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 "gdbsupport/vec.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
71 #include "gdbsupport/filestuff.h"
73 #include "namespace.h"
74 #include "gdbsupport/gdb_unlinker.h"
75 #include "gdbsupport/function-view.h"
76 #include "gdbsupport/gdb_optional.h"
77 #include "gdbsupport/underlying.h"
78 #include "gdbsupport/byte-vector.h"
79 #include "gdbsupport/hash_enum.h"
80 #include "filename-seen-cache.h"
83 #include <sys/types.h>
85 #include <unordered_set>
86 #include <unordered_map>
87 #include "gdbsupport/selftest.h"
90 #include <forward_list>
91 #include "rust-lang.h"
92 #include "gdbsupport/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
== 0;
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 std::vector
<dwarf2_section_info
> 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 dwo_file () = default;
707 DISABLE_COPY_AND_ASSIGN (dwo_file
);
709 /* The DW_AT_GNU_dwo_name attribute.
710 For virtual DWO files the name is constructed from the section offsets
711 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
712 from related CU+TUs. */
713 const char *dwo_name
= nullptr;
715 /* The DW_AT_comp_dir attribute. */
716 const char *comp_dir
= nullptr;
718 /* The bfd, when the file is open. Otherwise this is NULL.
719 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
720 gdb_bfd_ref_ptr dbfd
;
722 /* The sections that make up this DWO file.
723 Remember that for virtual DWO files in DWP V2, these are virtual
724 sections (for lack of a better name). */
725 struct dwo_sections sections
{};
727 /* The CUs in the file.
728 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
729 an extension to handle LLVM's Link Time Optimization output (where
730 multiple source files may be compiled into a single object/dwo pair). */
733 /* Table of TUs in the file.
734 Each element is a struct dwo_unit. */
738 /* These sections are what may appear in a DWP file. */
742 /* These are used by both DWP version 1 and 2. */
743 struct dwarf2_section_info str
;
744 struct dwarf2_section_info cu_index
;
745 struct dwarf2_section_info tu_index
;
747 /* These are only used by DWP version 2 files.
748 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
749 sections are referenced by section number, and are not recorded here.
750 In DWP version 2 there is at most one copy of all these sections, each
751 section being (effectively) comprised of the concatenation of all of the
752 individual sections that exist in the version 1 format.
753 To keep the code simple we treat each of these concatenated pieces as a
754 section itself (a virtual section?). */
755 struct dwarf2_section_info abbrev
;
756 struct dwarf2_section_info info
;
757 struct dwarf2_section_info line
;
758 struct dwarf2_section_info loc
;
759 struct dwarf2_section_info macinfo
;
760 struct dwarf2_section_info macro
;
761 struct dwarf2_section_info str_offsets
;
762 struct dwarf2_section_info types
;
765 /* These sections are what may appear in a virtual DWO file in DWP version 1.
766 A virtual DWO file is a DWO file as it appears in a DWP file. */
768 struct virtual_v1_dwo_sections
770 struct dwarf2_section_info abbrev
;
771 struct dwarf2_section_info line
;
772 struct dwarf2_section_info loc
;
773 struct dwarf2_section_info macinfo
;
774 struct dwarf2_section_info macro
;
775 struct dwarf2_section_info str_offsets
;
776 /* Each DWP hash table entry records one CU or one TU.
777 That is recorded here, and copied to dwo_unit.section. */
778 struct dwarf2_section_info info_or_types
;
781 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
782 In version 2, the sections of the DWO files are concatenated together
783 and stored in one section of that name. Thus each ELF section contains
784 several "virtual" sections. */
786 struct virtual_v2_dwo_sections
788 bfd_size_type abbrev_offset
;
789 bfd_size_type abbrev_size
;
791 bfd_size_type line_offset
;
792 bfd_size_type line_size
;
794 bfd_size_type loc_offset
;
795 bfd_size_type loc_size
;
797 bfd_size_type macinfo_offset
;
798 bfd_size_type macinfo_size
;
800 bfd_size_type macro_offset
;
801 bfd_size_type macro_size
;
803 bfd_size_type str_offsets_offset
;
804 bfd_size_type str_offsets_size
;
806 /* Each DWP hash table entry records one CU or one TU.
807 That is recorded here, and copied to dwo_unit.section. */
808 bfd_size_type info_or_types_offset
;
809 bfd_size_type info_or_types_size
;
812 /* Contents of DWP hash tables. */
814 struct dwp_hash_table
816 uint32_t version
, nr_columns
;
817 uint32_t nr_units
, nr_slots
;
818 const gdb_byte
*hash_table
, *unit_table
;
823 const gdb_byte
*indices
;
827 /* This is indexed by column number and gives the id of the section
829 #define MAX_NR_V2_DWO_SECTIONS \
830 (1 /* .debug_info or .debug_types */ \
831 + 1 /* .debug_abbrev */ \
832 + 1 /* .debug_line */ \
833 + 1 /* .debug_loc */ \
834 + 1 /* .debug_str_offsets */ \
835 + 1 /* .debug_macro or .debug_macinfo */)
836 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
837 const gdb_byte
*offsets
;
838 const gdb_byte
*sizes
;
843 /* Data for one DWP file. */
847 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
849 dbfd (std::move (abfd
))
853 /* Name of the file. */
856 /* File format version. */
860 gdb_bfd_ref_ptr dbfd
;
862 /* Section info for this file. */
863 struct dwp_sections sections
{};
865 /* Table of CUs in the file. */
866 const struct dwp_hash_table
*cus
= nullptr;
868 /* Table of TUs in the file. */
869 const struct dwp_hash_table
*tus
= nullptr;
871 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
872 htab_t loaded_cus
{};
873 htab_t loaded_tus
{};
875 /* Table to map ELF section numbers to their sections.
876 This is only needed for the DWP V1 file format. */
877 unsigned int num_sections
= 0;
878 asection
**elf_sections
= nullptr;
881 /* Struct used to pass misc. parameters to read_die_and_children, et
882 al. which are used for both .debug_info and .debug_types dies.
883 All parameters here are unchanging for the life of the call. This
884 struct exists to abstract away the constant parameters of die reading. */
886 struct die_reader_specs
888 /* The bfd of die_section. */
891 /* The CU of the DIE we are parsing. */
892 struct dwarf2_cu
*cu
;
894 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
895 struct dwo_file
*dwo_file
;
897 /* The section the die comes from.
898 This is either .debug_info or .debug_types, or the .dwo variants. */
899 struct dwarf2_section_info
*die_section
;
901 /* die_section->buffer. */
902 const gdb_byte
*buffer
;
904 /* The end of the buffer. */
905 const gdb_byte
*buffer_end
;
907 /* The value of the DW_AT_comp_dir attribute. */
908 const char *comp_dir
;
910 /* The abbreviation table to use when reading the DIEs. */
911 struct abbrev_table
*abbrev_table
;
914 /* Type of function passed to init_cutu_and_read_dies, et.al. */
915 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
916 const gdb_byte
*info_ptr
,
917 struct die_info
*comp_unit_die
,
921 /* A 1-based directory index. This is a strong typedef to prevent
922 accidentally using a directory index as a 0-based index into an
924 enum class dir_index
: unsigned int {};
926 /* Likewise, a 1-based file name index. */
927 enum class file_name_index
: unsigned int {};
931 file_entry () = default;
933 file_entry (const char *name_
, dir_index d_index_
,
934 unsigned int mod_time_
, unsigned int length_
)
937 mod_time (mod_time_
),
941 /* Return the include directory at D_INDEX stored in LH. Returns
942 NULL if D_INDEX is out of bounds. */
943 const char *include_dir (const line_header
*lh
) const;
945 /* The file name. Note this is an observing pointer. The memory is
946 owned by debug_line_buffer. */
949 /* The directory index (1-based). */
950 dir_index d_index
{};
952 unsigned int mod_time
{};
954 unsigned int length
{};
956 /* True if referenced by the Line Number Program. */
959 /* The associated symbol table, if any. */
960 struct symtab
*symtab
{};
963 /* The line number information for a compilation unit (found in the
964 .debug_line section) begins with a "statement program header",
965 which contains the following information. */
972 /* Add an entry to the include directory table. */
973 void add_include_dir (const char *include_dir
);
975 /* Add an entry to the file name table. */
976 void add_file_name (const char *name
, dir_index d_index
,
977 unsigned int mod_time
, unsigned int length
);
979 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
981 const char *include_dir_at (dir_index index
) const
983 /* Convert directory index number (1-based) to vector index
985 size_t vec_index
= to_underlying (index
) - 1;
987 if (vec_index
>= include_dirs
.size ())
989 return include_dirs
[vec_index
];
992 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
994 file_entry
*file_name_at (file_name_index index
)
996 /* Convert file name index number (1-based) to vector index
998 size_t vec_index
= to_underlying (index
) - 1;
1000 if (vec_index
>= file_names
.size ())
1002 return &file_names
[vec_index
];
1005 /* Offset of line number information in .debug_line section. */
1006 sect_offset sect_off
{};
1008 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1009 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1011 unsigned int total_length
{};
1012 unsigned short version
{};
1013 unsigned int header_length
{};
1014 unsigned char minimum_instruction_length
{};
1015 unsigned char maximum_ops_per_instruction
{};
1016 unsigned char default_is_stmt
{};
1018 unsigned char line_range
{};
1019 unsigned char opcode_base
{};
1021 /* standard_opcode_lengths[i] is the number of operands for the
1022 standard opcode whose value is i. This means that
1023 standard_opcode_lengths[0] is unused, and the last meaningful
1024 element is standard_opcode_lengths[opcode_base - 1]. */
1025 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1027 /* The include_directories table. Note these are observing
1028 pointers. The memory is owned by debug_line_buffer. */
1029 std::vector
<const char *> include_dirs
;
1031 /* The file_names table. */
1032 std::vector
<file_entry
> file_names
;
1034 /* The start and end of the statement program following this
1035 header. These point into dwarf2_per_objfile->line_buffer. */
1036 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1039 typedef std::unique_ptr
<line_header
> line_header_up
;
1042 file_entry::include_dir (const line_header
*lh
) const
1044 return lh
->include_dir_at (d_index
);
1047 /* When we construct a partial symbol table entry we only
1048 need this much information. */
1049 struct partial_die_info
: public allocate_on_obstack
1051 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1053 /* Disable assign but still keep copy ctor, which is needed
1054 load_partial_dies. */
1055 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1057 /* Adjust the partial die before generating a symbol for it. This
1058 function may set the is_external flag or change the DIE's
1060 void fixup (struct dwarf2_cu
*cu
);
1062 /* Read a minimal amount of information into the minimal die
1064 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1065 const struct abbrev_info
&abbrev
,
1066 const gdb_byte
*info_ptr
);
1068 /* Offset of this DIE. */
1069 const sect_offset sect_off
;
1071 /* DWARF-2 tag for this DIE. */
1072 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1074 /* Assorted flags describing the data found in this DIE. */
1075 const unsigned int has_children
: 1;
1077 unsigned int is_external
: 1;
1078 unsigned int is_declaration
: 1;
1079 unsigned int has_type
: 1;
1080 unsigned int has_specification
: 1;
1081 unsigned int has_pc_info
: 1;
1082 unsigned int may_be_inlined
: 1;
1084 /* This DIE has been marked DW_AT_main_subprogram. */
1085 unsigned int main_subprogram
: 1;
1087 /* Flag set if the SCOPE field of this structure has been
1089 unsigned int scope_set
: 1;
1091 /* Flag set if the DIE has a byte_size attribute. */
1092 unsigned int has_byte_size
: 1;
1094 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1095 unsigned int has_const_value
: 1;
1097 /* Flag set if any of the DIE's children are template arguments. */
1098 unsigned int has_template_arguments
: 1;
1100 /* Flag set if fixup has been called on this die. */
1101 unsigned int fixup_called
: 1;
1103 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1104 unsigned int is_dwz
: 1;
1106 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1107 unsigned int spec_is_dwz
: 1;
1109 /* The name of this DIE. Normally the value of DW_AT_name, but
1110 sometimes a default name for unnamed DIEs. */
1111 const char *name
= nullptr;
1113 /* The linkage name, if present. */
1114 const char *linkage_name
= nullptr;
1116 /* The scope to prepend to our children. This is generally
1117 allocated on the comp_unit_obstack, so will disappear
1118 when this compilation unit leaves the cache. */
1119 const char *scope
= nullptr;
1121 /* Some data associated with the partial DIE. The tag determines
1122 which field is live. */
1125 /* The location description associated with this DIE, if any. */
1126 struct dwarf_block
*locdesc
;
1127 /* The offset of an import, for DW_TAG_imported_unit. */
1128 sect_offset sect_off
;
1131 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1132 CORE_ADDR lowpc
= 0;
1133 CORE_ADDR highpc
= 0;
1135 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1136 DW_AT_sibling, if any. */
1137 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1138 could return DW_AT_sibling values to its caller load_partial_dies. */
1139 const gdb_byte
*sibling
= nullptr;
1141 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1142 DW_AT_specification (or DW_AT_abstract_origin or
1143 DW_AT_extension). */
1144 sect_offset spec_offset
{};
1146 /* Pointers to this DIE's parent, first child, and next sibling,
1148 struct partial_die_info
*die_parent
= nullptr;
1149 struct partial_die_info
*die_child
= nullptr;
1150 struct partial_die_info
*die_sibling
= nullptr;
1152 friend struct partial_die_info
*
1153 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1156 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1157 partial_die_info (sect_offset sect_off
)
1158 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1162 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1164 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1169 has_specification
= 0;
1172 main_subprogram
= 0;
1175 has_const_value
= 0;
1176 has_template_arguments
= 0;
1183 /* This data structure holds the information of an abbrev. */
1186 unsigned int number
; /* number identifying abbrev */
1187 enum dwarf_tag tag
; /* dwarf tag */
1188 unsigned short has_children
; /* boolean */
1189 unsigned short num_attrs
; /* number of attributes */
1190 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1191 struct abbrev_info
*next
; /* next in chain */
1196 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1197 ENUM_BITFIELD(dwarf_form
) form
: 16;
1199 /* It is valid only if FORM is DW_FORM_implicit_const. */
1200 LONGEST implicit_const
;
1203 /* Size of abbrev_table.abbrev_hash_table. */
1204 #define ABBREV_HASH_SIZE 121
1206 /* Top level data structure to contain an abbreviation table. */
1210 explicit abbrev_table (sect_offset off
)
1214 XOBNEWVEC (&abbrev_obstack
, struct abbrev_info
*, ABBREV_HASH_SIZE
);
1215 memset (m_abbrevs
, 0, ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
1218 DISABLE_COPY_AND_ASSIGN (abbrev_table
);
1220 /* Allocate space for a struct abbrev_info object in
1222 struct abbrev_info
*alloc_abbrev ();
1224 /* Add an abbreviation to the table. */
1225 void add_abbrev (unsigned int abbrev_number
, struct abbrev_info
*abbrev
);
1227 /* Look up an abbrev in the table.
1228 Returns NULL if the abbrev is not found. */
1230 struct abbrev_info
*lookup_abbrev (unsigned int abbrev_number
);
1233 /* Where the abbrev table came from.
1234 This is used as a sanity check when the table is used. */
1235 const sect_offset sect_off
;
1237 /* Storage for the abbrev table. */
1238 auto_obstack abbrev_obstack
;
1242 /* Hash table of abbrevs.
1243 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1244 It could be statically allocated, but the previous code didn't so we
1246 struct abbrev_info
**m_abbrevs
;
1249 typedef std::unique_ptr
<struct abbrev_table
> abbrev_table_up
;
1251 /* Attributes have a name and a value. */
1254 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1255 ENUM_BITFIELD(dwarf_form
) form
: 15;
1257 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1258 field should be in u.str (existing only for DW_STRING) but it is kept
1259 here for better struct attribute alignment. */
1260 unsigned int string_is_canonical
: 1;
1265 struct dwarf_block
*blk
;
1274 /* This data structure holds a complete die structure. */
1277 /* DWARF-2 tag for this DIE. */
1278 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1280 /* Number of attributes */
1281 unsigned char num_attrs
;
1283 /* True if we're presently building the full type name for the
1284 type derived from this DIE. */
1285 unsigned char building_fullname
: 1;
1287 /* True if this die is in process. PR 16581. */
1288 unsigned char in_process
: 1;
1291 unsigned int abbrev
;
1293 /* Offset in .debug_info or .debug_types section. */
1294 sect_offset sect_off
;
1296 /* The dies in a compilation unit form an n-ary tree. PARENT
1297 points to this die's parent; CHILD points to the first child of
1298 this node; and all the children of a given node are chained
1299 together via their SIBLING fields. */
1300 struct die_info
*child
; /* Its first child, if any. */
1301 struct die_info
*sibling
; /* Its next sibling, if any. */
1302 struct die_info
*parent
; /* Its parent, if any. */
1304 /* An array of attributes, with NUM_ATTRS elements. There may be
1305 zero, but it's not common and zero-sized arrays are not
1306 sufficiently portable C. */
1307 struct attribute attrs
[1];
1310 /* Get at parts of an attribute structure. */
1312 #define DW_STRING(attr) ((attr)->u.str)
1313 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1314 #define DW_UNSND(attr) ((attr)->u.unsnd)
1315 #define DW_BLOCK(attr) ((attr)->u.blk)
1316 #define DW_SND(attr) ((attr)->u.snd)
1317 #define DW_ADDR(attr) ((attr)->u.addr)
1318 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1320 /* Blocks are a bunch of untyped bytes. */
1325 /* Valid only if SIZE is not zero. */
1326 const gdb_byte
*data
;
1329 #ifndef ATTR_ALLOC_CHUNK
1330 #define ATTR_ALLOC_CHUNK 4
1333 /* Allocate fields for structs, unions and enums in this size. */
1334 #ifndef DW_FIELD_ALLOC_CHUNK
1335 #define DW_FIELD_ALLOC_CHUNK 4
1338 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1339 but this would require a corresponding change in unpack_field_as_long
1341 static int bits_per_byte
= 8;
1343 /* When reading a variant or variant part, we track a bit more
1344 information about the field, and store it in an object of this
1347 struct variant_field
1349 /* If we see a DW_TAG_variant, then this will be the discriminant
1351 ULONGEST discriminant_value
;
1352 /* If we see a DW_TAG_variant, then this will be set if this is the
1354 bool default_branch
;
1355 /* While reading a DW_TAG_variant_part, this will be set if this
1356 field is the discriminant. */
1357 bool is_discriminant
;
1362 int accessibility
= 0;
1364 /* Extra information to describe a variant or variant part. */
1365 struct variant_field variant
{};
1366 struct field field
{};
1371 const char *name
= nullptr;
1372 std::vector
<struct fn_field
> fnfields
;
1375 /* The routines that read and process dies for a C struct or C++ class
1376 pass lists of data member fields and lists of member function fields
1377 in an instance of a field_info structure, as defined below. */
1380 /* List of data member and baseclasses fields. */
1381 std::vector
<struct nextfield
> fields
;
1382 std::vector
<struct nextfield
> baseclasses
;
1384 /* Number of fields (including baseclasses). */
1387 /* Set if the accesibility of one of the fields is not public. */
1388 int non_public_fields
= 0;
1390 /* Member function fieldlist array, contains name of possibly overloaded
1391 member function, number of overloaded member functions and a pointer
1392 to the head of the member function field chain. */
1393 std::vector
<struct fnfieldlist
> fnfieldlists
;
1395 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1396 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1397 std::vector
<struct decl_field
> typedef_field_list
;
1399 /* Nested types defined by this class and the number of elements in this
1401 std::vector
<struct decl_field
> nested_types_list
;
1404 /* One item on the queue of compilation units to read in full symbols
1406 struct dwarf2_queue_item
1408 struct dwarf2_per_cu_data
*per_cu
;
1409 enum language pretend_language
;
1410 struct dwarf2_queue_item
*next
;
1413 /* The current queue. */
1414 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1416 /* Loaded secondary compilation units are kept in memory until they
1417 have not been referenced for the processing of this many
1418 compilation units. Set this to zero to disable caching. Cache
1419 sizes of up to at least twenty will improve startup time for
1420 typical inter-CU-reference binaries, at an obvious memory cost. */
1421 static int dwarf_max_cache_age
= 5;
1423 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1424 struct cmd_list_element
*c
, const char *value
)
1426 fprintf_filtered (file
, _("The upper bound on the age of cached "
1427 "DWARF compilation units is %s.\n"),
1431 /* local function prototypes */
1433 static const char *get_section_name (const struct dwarf2_section_info
*);
1435 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1437 static void dwarf2_find_base_address (struct die_info
*die
,
1438 struct dwarf2_cu
*cu
);
1440 static struct partial_symtab
*create_partial_symtab
1441 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1443 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1444 const gdb_byte
*info_ptr
,
1445 struct die_info
*type_unit_die
,
1446 int has_children
, void *data
);
1448 static void dwarf2_build_psymtabs_hard
1449 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1451 static void scan_partial_symbols (struct partial_die_info
*,
1452 CORE_ADDR
*, CORE_ADDR
*,
1453 int, struct dwarf2_cu
*);
1455 static void add_partial_symbol (struct partial_die_info
*,
1456 struct dwarf2_cu
*);
1458 static void add_partial_namespace (struct partial_die_info
*pdi
,
1459 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1460 int set_addrmap
, struct dwarf2_cu
*cu
);
1462 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1463 CORE_ADDR
*highpc
, int set_addrmap
,
1464 struct dwarf2_cu
*cu
);
1466 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1467 struct dwarf2_cu
*cu
);
1469 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1470 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1471 int need_pc
, struct dwarf2_cu
*cu
);
1473 static void dwarf2_read_symtab (struct partial_symtab
*,
1476 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1478 static abbrev_table_up abbrev_table_read_table
1479 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, struct dwarf2_section_info
*,
1482 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1484 static struct partial_die_info
*load_partial_dies
1485 (const struct die_reader_specs
*, const gdb_byte
*, int);
1487 /* A pair of partial_die_info and compilation unit. */
1488 struct cu_partial_die_info
1490 /* The compilation unit of the partial_die_info. */
1491 struct dwarf2_cu
*cu
;
1492 /* A partial_die_info. */
1493 struct partial_die_info
*pdi
;
1495 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1501 cu_partial_die_info () = delete;
1504 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1505 struct dwarf2_cu
*);
1507 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1508 struct attribute
*, struct attr_abbrev
*,
1511 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1513 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1515 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1517 /* Read the next three bytes (little-endian order) as an unsigned integer. */
1518 static unsigned int read_3_bytes (bfd
*, const gdb_byte
*);
1520 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1522 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1524 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1527 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1529 static LONGEST read_checked_initial_length_and_offset
1530 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1531 unsigned int *, unsigned int *);
1533 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1534 const struct comp_unit_head
*,
1537 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1539 static sect_offset read_abbrev_offset
1540 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1541 struct dwarf2_section_info
*, sect_offset
);
1543 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1545 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1547 static const char *read_indirect_string
1548 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1549 const struct comp_unit_head
*, unsigned int *);
1551 static const char *read_indirect_line_string
1552 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1553 const struct comp_unit_head
*, unsigned int *);
1555 static const char *read_indirect_string_at_offset
1556 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1557 LONGEST str_offset
);
1559 static const char *read_indirect_string_from_dwz
1560 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1562 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1564 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1568 static const char *read_str_index (const struct die_reader_specs
*reader
,
1569 ULONGEST str_index
);
1571 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1573 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1574 struct dwarf2_cu
*);
1576 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1579 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1580 struct dwarf2_cu
*cu
);
1582 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1583 struct dwarf2_cu
*cu
);
1585 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1587 static struct die_info
*die_specification (struct die_info
*die
,
1588 struct dwarf2_cu
**);
1590 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1591 struct dwarf2_cu
*cu
);
1593 static void dwarf_decode_lines (struct line_header
*, const char *,
1594 struct dwarf2_cu
*, struct partial_symtab
*,
1595 CORE_ADDR
, int decode_mapping
);
1597 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1600 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1601 struct dwarf2_cu
*, struct symbol
* = NULL
);
1603 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1604 struct dwarf2_cu
*);
1606 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1609 struct obstack
*obstack
,
1610 struct dwarf2_cu
*cu
, LONGEST
*value
,
1611 const gdb_byte
**bytes
,
1612 struct dwarf2_locexpr_baton
**baton
);
1614 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1616 static int need_gnat_info (struct dwarf2_cu
*);
1618 static struct type
*die_descriptive_type (struct die_info
*,
1619 struct dwarf2_cu
*);
1621 static void set_descriptive_type (struct type
*, struct die_info
*,
1622 struct dwarf2_cu
*);
1624 static struct type
*die_containing_type (struct die_info
*,
1625 struct dwarf2_cu
*);
1627 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1628 struct dwarf2_cu
*);
1630 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1632 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1634 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1636 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1637 const char *suffix
, int physname
,
1638 struct dwarf2_cu
*cu
);
1640 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1642 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1644 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1646 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1648 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1650 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1652 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1653 struct dwarf2_cu
*, struct partial_symtab
*);
1655 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1656 values. Keep the items ordered with increasing constraints compliance. */
1659 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1660 PC_BOUNDS_NOT_PRESENT
,
1662 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1663 were present but they do not form a valid range of PC addresses. */
1666 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1669 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1673 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1674 CORE_ADDR
*, CORE_ADDR
*,
1676 struct partial_symtab
*);
1678 static void get_scope_pc_bounds (struct die_info
*,
1679 CORE_ADDR
*, CORE_ADDR
*,
1680 struct dwarf2_cu
*);
1682 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1683 CORE_ADDR
, struct dwarf2_cu
*);
1685 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1686 struct dwarf2_cu
*);
1688 static void dwarf2_attach_fields_to_type (struct field_info
*,
1689 struct type
*, struct dwarf2_cu
*);
1691 static void dwarf2_add_member_fn (struct field_info
*,
1692 struct die_info
*, struct type
*,
1693 struct dwarf2_cu
*);
1695 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1697 struct dwarf2_cu
*);
1699 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1701 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1703 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1705 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1707 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1709 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1711 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1713 static struct type
*read_module_type (struct die_info
*die
,
1714 struct dwarf2_cu
*cu
);
1716 static const char *namespace_name (struct die_info
*die
,
1717 int *is_anonymous
, struct dwarf2_cu
*);
1719 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1721 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1723 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1724 struct dwarf2_cu
*);
1726 static struct die_info
*read_die_and_siblings_1
1727 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1730 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1731 const gdb_byte
*info_ptr
,
1732 const gdb_byte
**new_info_ptr
,
1733 struct die_info
*parent
);
1735 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1736 struct die_info
**, const gdb_byte
*,
1739 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1740 struct die_info
**, const gdb_byte
*,
1743 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1745 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1748 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1750 static const char *dwarf2_full_name (const char *name
,
1751 struct die_info
*die
,
1752 struct dwarf2_cu
*cu
);
1754 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1755 struct dwarf2_cu
*cu
);
1757 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1758 struct dwarf2_cu
**);
1760 static const char *dwarf_tag_name (unsigned int);
1762 static const char *dwarf_attr_name (unsigned int);
1764 static const char *dwarf_form_name (unsigned int);
1766 static const char *dwarf_bool_name (unsigned int);
1768 static const char *dwarf_type_encoding_name (unsigned int);
1770 static struct die_info
*sibling_die (struct die_info
*);
1772 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1774 static void dump_die_for_error (struct die_info
*);
1776 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1779 /*static*/ void dump_die (struct die_info
*, int max_level
);
1781 static void store_in_ref_table (struct die_info
*,
1782 struct dwarf2_cu
*);
1784 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1786 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1788 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1789 const struct attribute
*,
1790 struct dwarf2_cu
**);
1792 static struct die_info
*follow_die_ref (struct die_info
*,
1793 const struct attribute
*,
1794 struct dwarf2_cu
**);
1796 static struct die_info
*follow_die_sig (struct die_info
*,
1797 const struct attribute
*,
1798 struct dwarf2_cu
**);
1800 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1801 struct dwarf2_cu
*);
1803 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1804 const struct attribute
*,
1805 struct dwarf2_cu
*);
1807 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1809 static void read_signatured_type (struct signatured_type
*);
1811 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1812 struct die_info
*die
, struct dwarf2_cu
*cu
,
1813 struct dynamic_prop
*prop
, struct type
*type
);
1815 /* memory allocation interface */
1817 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1819 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1821 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1823 static int attr_form_is_block (const struct attribute
*);
1825 static int attr_form_is_section_offset (const struct attribute
*);
1827 static int attr_form_is_constant (const struct attribute
*);
1829 static int attr_form_is_ref (const struct attribute
*);
1831 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1832 struct dwarf2_loclist_baton
*baton
,
1833 const struct attribute
*attr
);
1835 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1837 struct dwarf2_cu
*cu
,
1840 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1841 const gdb_byte
*info_ptr
,
1842 struct abbrev_info
*abbrev
);
1844 static hashval_t
partial_die_hash (const void *item
);
1846 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1848 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1849 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1850 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1852 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1853 struct die_info
*comp_unit_die
,
1854 enum language pretend_language
);
1856 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1858 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1860 static struct type
*set_die_type (struct die_info
*, struct type
*,
1861 struct dwarf2_cu
*);
1863 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1865 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1867 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1870 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1873 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1876 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1877 struct dwarf2_per_cu_data
*);
1879 static void dwarf2_mark (struct dwarf2_cu
*);
1881 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1883 static struct type
*get_die_type_at_offset (sect_offset
,
1884 struct dwarf2_per_cu_data
*);
1886 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1888 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1889 enum language pretend_language
);
1891 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1893 static struct type
*dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data
*per_cu
);
1894 static struct type
*dwarf2_per_cu_addr_sized_int_type
1895 (struct dwarf2_per_cu_data
*per_cu
, bool unsigned_p
);
1897 /* Class, the destructor of which frees all allocated queue entries. This
1898 will only have work to do if an error was thrown while processing the
1899 dwarf. If no error was thrown then the queue entries should have all
1900 been processed, and freed, as we went along. */
1902 class dwarf2_queue_guard
1905 dwarf2_queue_guard () = default;
1907 /* Free any entries remaining on the queue. There should only be
1908 entries left if we hit an error while processing the dwarf. */
1909 ~dwarf2_queue_guard ()
1911 struct dwarf2_queue_item
*item
, *last
;
1913 item
= dwarf2_queue
;
1916 /* Anything still marked queued is likely to be in an
1917 inconsistent state, so discard it. */
1918 if (item
->per_cu
->queued
)
1920 if (item
->per_cu
->cu
!= NULL
)
1921 free_one_cached_comp_unit (item
->per_cu
);
1922 item
->per_cu
->queued
= 0;
1930 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
1934 /* The return type of find_file_and_directory. Note, the enclosed
1935 string pointers are only valid while this object is valid. */
1937 struct file_and_directory
1939 /* The filename. This is never NULL. */
1942 /* The compilation directory. NULL if not known. If we needed to
1943 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1944 points directly to the DW_AT_comp_dir string attribute owned by
1945 the obstack that owns the DIE. */
1946 const char *comp_dir
;
1948 /* If we needed to build a new string for comp_dir, this is what
1949 owns the storage. */
1950 std::string comp_dir_storage
;
1953 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1954 struct dwarf2_cu
*cu
);
1956 static char *file_full_name (int file
, struct line_header
*lh
,
1957 const char *comp_dir
);
1959 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1960 enum class rcuh_kind
{ COMPILE
, TYPE
};
1962 static const gdb_byte
*read_and_check_comp_unit_head
1963 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1964 struct comp_unit_head
*header
,
1965 struct dwarf2_section_info
*section
,
1966 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1967 rcuh_kind section_kind
);
1969 static void init_cutu_and_read_dies
1970 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1971 int use_existing_cu
, int keep
, bool skip_partial
,
1972 die_reader_func_ftype
*die_reader_func
, void *data
);
1974 static void init_cutu_and_read_dies_simple
1975 (struct dwarf2_per_cu_data
*this_cu
,
1976 die_reader_func_ftype
*die_reader_func
, void *data
);
1978 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1980 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1982 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1983 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1984 struct dwp_file
*dwp_file
, const char *comp_dir
,
1985 ULONGEST signature
, int is_debug_types
);
1987 static struct dwp_file
*get_dwp_file
1988 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1990 static struct dwo_unit
*lookup_dwo_comp_unit
1991 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1993 static struct dwo_unit
*lookup_dwo_type_unit
1994 (struct signatured_type
*, const char *, const char *);
1996 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1998 /* A unique pointer to a dwo_file. */
2000 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
2002 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2004 static void check_producer (struct dwarf2_cu
*cu
);
2006 static void free_line_header_voidp (void *arg
);
2008 /* Various complaints about symbol reading that don't abort the process. */
2011 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2013 complaint (_("statement list doesn't fit in .debug_line section"));
2017 dwarf2_debug_line_missing_file_complaint (void)
2019 complaint (_(".debug_line section has line data without a file"));
2023 dwarf2_debug_line_missing_end_sequence_complaint (void)
2025 complaint (_(".debug_line section has line "
2026 "program sequence without an end"));
2030 dwarf2_complex_location_expr_complaint (void)
2032 complaint (_("location expression too complex"));
2036 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2039 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
2044 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2046 complaint (_("debug info runs off end of %s section"
2048 get_section_name (section
),
2049 get_section_file_name (section
));
2053 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2055 complaint (_("macro debug info contains a "
2056 "malformed macro definition:\n`%s'"),
2061 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2063 complaint (_("invalid attribute class or form for '%s' in '%s'"),
2067 /* Hash function for line_header_hash. */
2070 line_header_hash (const struct line_header
*ofs
)
2072 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2075 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2078 line_header_hash_voidp (const void *item
)
2080 const struct line_header
*ofs
= (const struct line_header
*) item
;
2082 return line_header_hash (ofs
);
2085 /* Equality function for line_header_hash. */
2088 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2090 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2091 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2093 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2094 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2099 /* Read the given attribute value as an address, taking the attribute's
2100 form into account. */
2103 attr_value_as_address (struct attribute
*attr
)
2107 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_addrx
2108 && attr
->form
!= DW_FORM_GNU_addr_index
)
2110 /* Aside from a few clearly defined exceptions, attributes that
2111 contain an address must always be in DW_FORM_addr form.
2112 Unfortunately, some compilers happen to be violating this
2113 requirement by encoding addresses using other forms, such
2114 as DW_FORM_data4 for example. For those broken compilers,
2115 we try to do our best, without any guarantee of success,
2116 to interpret the address correctly. It would also be nice
2117 to generate a complaint, but that would require us to maintain
2118 a list of legitimate cases where a non-address form is allowed,
2119 as well as update callers to pass in at least the CU's DWARF
2120 version. This is more overhead than what we're willing to
2121 expand for a pretty rare case. */
2122 addr
= DW_UNSND (attr
);
2125 addr
= DW_ADDR (attr
);
2130 /* See declaration. */
2132 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2133 const dwarf2_debug_sections
*names
)
2134 : objfile (objfile_
)
2137 names
= &dwarf2_elf_names
;
2139 bfd
*obfd
= objfile
->obfd
;
2141 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2142 locate_sections (obfd
, sec
, *names
);
2145 dwarf2_per_objfile::~dwarf2_per_objfile ()
2147 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2148 free_cached_comp_units ();
2150 if (quick_file_names_table
)
2151 htab_delete (quick_file_names_table
);
2153 if (line_header_hash
)
2154 htab_delete (line_header_hash
);
2156 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2157 VEC_free (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
);
2159 for (signatured_type
*sig_type
: all_type_units
)
2160 VEC_free (dwarf2_per_cu_ptr
, sig_type
->per_cu
.imported_symtabs
);
2162 /* Everything else should be on the objfile obstack. */
2165 /* See declaration. */
2168 dwarf2_per_objfile::free_cached_comp_units ()
2170 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2171 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2172 while (per_cu
!= NULL
)
2174 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2177 *last_chain
= next_cu
;
2182 /* A helper class that calls free_cached_comp_units on
2185 class free_cached_comp_units
2189 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2190 : m_per_objfile (per_objfile
)
2194 ~free_cached_comp_units ()
2196 m_per_objfile
->free_cached_comp_units ();
2199 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2203 dwarf2_per_objfile
*m_per_objfile
;
2206 /* Try to locate the sections we need for DWARF 2 debugging
2207 information and return true if we have enough to do something.
2208 NAMES points to the dwarf2 section names, or is NULL if the standard
2209 ELF names are used. */
2212 dwarf2_has_info (struct objfile
*objfile
,
2213 const struct dwarf2_debug_sections
*names
)
2215 if (objfile
->flags
& OBJF_READNEVER
)
2218 struct dwarf2_per_objfile
*dwarf2_per_objfile
2219 = get_dwarf2_per_objfile (objfile
);
2221 if (dwarf2_per_objfile
== NULL
)
2222 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
2225 return (!dwarf2_per_objfile
->info
.is_virtual
2226 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2227 && !dwarf2_per_objfile
->abbrev
.is_virtual
2228 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2231 /* Return the containing section of virtual section SECTION. */
2233 static struct dwarf2_section_info
*
2234 get_containing_section (const struct dwarf2_section_info
*section
)
2236 gdb_assert (section
->is_virtual
);
2237 return section
->s
.containing_section
;
2240 /* Return the bfd owner of SECTION. */
2243 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2245 if (section
->is_virtual
)
2247 section
= get_containing_section (section
);
2248 gdb_assert (!section
->is_virtual
);
2250 return section
->s
.section
->owner
;
2253 /* Return the bfd section of SECTION.
2254 Returns NULL if the section is not present. */
2257 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2259 if (section
->is_virtual
)
2261 section
= get_containing_section (section
);
2262 gdb_assert (!section
->is_virtual
);
2264 return section
->s
.section
;
2267 /* Return the name of SECTION. */
2270 get_section_name (const struct dwarf2_section_info
*section
)
2272 asection
*sectp
= get_section_bfd_section (section
);
2274 gdb_assert (sectp
!= NULL
);
2275 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2278 /* Return the name of the file SECTION is in. */
2281 get_section_file_name (const struct dwarf2_section_info
*section
)
2283 bfd
*abfd
= get_section_bfd_owner (section
);
2285 return bfd_get_filename (abfd
);
2288 /* Return the id of SECTION.
2289 Returns 0 if SECTION doesn't exist. */
2292 get_section_id (const struct dwarf2_section_info
*section
)
2294 asection
*sectp
= get_section_bfd_section (section
);
2301 /* Return the flags of SECTION.
2302 SECTION (or containing section if this is a virtual section) must exist. */
2305 get_section_flags (const struct dwarf2_section_info
*section
)
2307 asection
*sectp
= get_section_bfd_section (section
);
2309 gdb_assert (sectp
!= NULL
);
2310 return bfd_get_section_flags (sectp
->owner
, sectp
);
2313 /* When loading sections, we look either for uncompressed section or for
2314 compressed section names. */
2317 section_is_p (const char *section_name
,
2318 const struct dwarf2_section_names
*names
)
2320 if (names
->normal
!= NULL
2321 && strcmp (section_name
, names
->normal
) == 0)
2323 if (names
->compressed
!= NULL
2324 && strcmp (section_name
, names
->compressed
) == 0)
2329 /* See declaration. */
2332 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2333 const dwarf2_debug_sections
&names
)
2335 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2337 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2340 else if (section_is_p (sectp
->name
, &names
.info
))
2342 this->info
.s
.section
= sectp
;
2343 this->info
.size
= bfd_get_section_size (sectp
);
2345 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2347 this->abbrev
.s
.section
= sectp
;
2348 this->abbrev
.size
= bfd_get_section_size (sectp
);
2350 else if (section_is_p (sectp
->name
, &names
.line
))
2352 this->line
.s
.section
= sectp
;
2353 this->line
.size
= bfd_get_section_size (sectp
);
2355 else if (section_is_p (sectp
->name
, &names
.loc
))
2357 this->loc
.s
.section
= sectp
;
2358 this->loc
.size
= bfd_get_section_size (sectp
);
2360 else if (section_is_p (sectp
->name
, &names
.loclists
))
2362 this->loclists
.s
.section
= sectp
;
2363 this->loclists
.size
= bfd_get_section_size (sectp
);
2365 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2367 this->macinfo
.s
.section
= sectp
;
2368 this->macinfo
.size
= bfd_get_section_size (sectp
);
2370 else if (section_is_p (sectp
->name
, &names
.macro
))
2372 this->macro
.s
.section
= sectp
;
2373 this->macro
.size
= bfd_get_section_size (sectp
);
2375 else if (section_is_p (sectp
->name
, &names
.str
))
2377 this->str
.s
.section
= sectp
;
2378 this->str
.size
= bfd_get_section_size (sectp
);
2380 else if (section_is_p (sectp
->name
, &names
.line_str
))
2382 this->line_str
.s
.section
= sectp
;
2383 this->line_str
.size
= bfd_get_section_size (sectp
);
2385 else if (section_is_p (sectp
->name
, &names
.addr
))
2387 this->addr
.s
.section
= sectp
;
2388 this->addr
.size
= bfd_get_section_size (sectp
);
2390 else if (section_is_p (sectp
->name
, &names
.frame
))
2392 this->frame
.s
.section
= sectp
;
2393 this->frame
.size
= bfd_get_section_size (sectp
);
2395 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2397 this->eh_frame
.s
.section
= sectp
;
2398 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2400 else if (section_is_p (sectp
->name
, &names
.ranges
))
2402 this->ranges
.s
.section
= sectp
;
2403 this->ranges
.size
= bfd_get_section_size (sectp
);
2405 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2407 this->rnglists
.s
.section
= sectp
;
2408 this->rnglists
.size
= bfd_get_section_size (sectp
);
2410 else if (section_is_p (sectp
->name
, &names
.types
))
2412 struct dwarf2_section_info type_section
;
2414 memset (&type_section
, 0, sizeof (type_section
));
2415 type_section
.s
.section
= sectp
;
2416 type_section
.size
= bfd_get_section_size (sectp
);
2418 this->types
.push_back (type_section
);
2420 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2422 this->gdb_index
.s
.section
= sectp
;
2423 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2425 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2427 this->debug_names
.s
.section
= sectp
;
2428 this->debug_names
.size
= bfd_get_section_size (sectp
);
2430 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2432 this->debug_aranges
.s
.section
= sectp
;
2433 this->debug_aranges
.size
= bfd_get_section_size (sectp
);
2436 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2437 && bfd_section_vma (abfd
, sectp
) == 0)
2438 this->has_section_at_zero
= true;
2441 /* A helper function that decides whether a section is empty,
2445 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2447 if (section
->is_virtual
)
2448 return section
->size
== 0;
2449 return section
->s
.section
== NULL
|| section
->size
== 0;
2452 /* See dwarf2read.h. */
2455 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2459 gdb_byte
*buf
, *retbuf
;
2463 info
->buffer
= NULL
;
2464 info
->readin
= true;
2466 if (dwarf2_section_empty_p (info
))
2469 sectp
= get_section_bfd_section (info
);
2471 /* If this is a virtual section we need to read in the real one first. */
2472 if (info
->is_virtual
)
2474 struct dwarf2_section_info
*containing_section
=
2475 get_containing_section (info
);
2477 gdb_assert (sectp
!= NULL
);
2478 if ((sectp
->flags
& SEC_RELOC
) != 0)
2480 error (_("Dwarf Error: DWP format V2 with relocations is not"
2481 " supported in section %s [in module %s]"),
2482 get_section_name (info
), get_section_file_name (info
));
2484 dwarf2_read_section (objfile
, containing_section
);
2485 /* Other code should have already caught virtual sections that don't
2487 gdb_assert (info
->virtual_offset
+ info
->size
2488 <= containing_section
->size
);
2489 /* If the real section is empty or there was a problem reading the
2490 section we shouldn't get here. */
2491 gdb_assert (containing_section
->buffer
!= NULL
);
2492 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2496 /* If the section has relocations, we must read it ourselves.
2497 Otherwise we attach it to the BFD. */
2498 if ((sectp
->flags
& SEC_RELOC
) == 0)
2500 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2504 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2507 /* When debugging .o files, we may need to apply relocations; see
2508 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2509 We never compress sections in .o files, so we only need to
2510 try this when the section is not compressed. */
2511 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2514 info
->buffer
= retbuf
;
2518 abfd
= get_section_bfd_owner (info
);
2519 gdb_assert (abfd
!= NULL
);
2521 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2522 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2524 error (_("Dwarf Error: Can't read DWARF data"
2525 " in section %s [in module %s]"),
2526 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2530 /* A helper function that returns the size of a section in a safe way.
2531 If you are positive that the section has been read before using the
2532 size, then it is safe to refer to the dwarf2_section_info object's
2533 "size" field directly. In other cases, you must call this
2534 function, because for compressed sections the size field is not set
2535 correctly until the section has been read. */
2537 static bfd_size_type
2538 dwarf2_section_size (struct objfile
*objfile
,
2539 struct dwarf2_section_info
*info
)
2542 dwarf2_read_section (objfile
, info
);
2546 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2550 dwarf2_get_section_info (struct objfile
*objfile
,
2551 enum dwarf2_section_enum sect
,
2552 asection
**sectp
, const gdb_byte
**bufp
,
2553 bfd_size_type
*sizep
)
2555 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
2556 struct dwarf2_section_info
*info
;
2558 /* We may see an objfile without any DWARF, in which case we just
2569 case DWARF2_DEBUG_FRAME
:
2570 info
= &data
->frame
;
2572 case DWARF2_EH_FRAME
:
2573 info
= &data
->eh_frame
;
2576 gdb_assert_not_reached ("unexpected section");
2579 dwarf2_read_section (objfile
, info
);
2581 *sectp
= get_section_bfd_section (info
);
2582 *bufp
= info
->buffer
;
2583 *sizep
= info
->size
;
2586 /* A helper function to find the sections for a .dwz file. */
2589 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2591 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2593 /* Note that we only support the standard ELF names, because .dwz
2594 is ELF-only (at the time of writing). */
2595 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2597 dwz_file
->abbrev
.s
.section
= sectp
;
2598 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2600 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2602 dwz_file
->info
.s
.section
= sectp
;
2603 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2605 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2607 dwz_file
->str
.s
.section
= sectp
;
2608 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2610 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2612 dwz_file
->line
.s
.section
= sectp
;
2613 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2615 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2617 dwz_file
->macro
.s
.section
= sectp
;
2618 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2620 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2622 dwz_file
->gdb_index
.s
.section
= sectp
;
2623 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2625 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2627 dwz_file
->debug_names
.s
.section
= sectp
;
2628 dwz_file
->debug_names
.size
= bfd_get_section_size (sectp
);
2632 /* See dwarf2read.h. */
2635 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2637 const char *filename
;
2638 bfd_size_type buildid_len_arg
;
2642 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2643 return dwarf2_per_objfile
->dwz_file
.get ();
2645 bfd_set_error (bfd_error_no_error
);
2646 gdb::unique_xmalloc_ptr
<char> data
2647 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2648 &buildid_len_arg
, &buildid
));
2651 if (bfd_get_error () == bfd_error_no_error
)
2653 error (_("could not read '.gnu_debugaltlink' section: %s"),
2654 bfd_errmsg (bfd_get_error ()));
2657 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2659 buildid_len
= (size_t) buildid_len_arg
;
2661 filename
= data
.get ();
2663 std::string abs_storage
;
2664 if (!IS_ABSOLUTE_PATH (filename
))
2666 gdb::unique_xmalloc_ptr
<char> abs
2667 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2669 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2670 filename
= abs_storage
.c_str ();
2673 /* First try the file name given in the section. If that doesn't
2674 work, try to use the build-id instead. */
2675 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2676 if (dwz_bfd
!= NULL
)
2678 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2679 dwz_bfd
.reset (nullptr);
2682 if (dwz_bfd
== NULL
)
2683 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2685 if (dwz_bfd
== NULL
)
2686 error (_("could not find '.gnu_debugaltlink' file for %s"),
2687 objfile_name (dwarf2_per_objfile
->objfile
));
2689 std::unique_ptr
<struct dwz_file
> result
2690 (new struct dwz_file (std::move (dwz_bfd
)));
2692 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2695 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2696 result
->dwz_bfd
.get ());
2697 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2698 return dwarf2_per_objfile
->dwz_file
.get ();
2701 /* DWARF quick_symbols_functions support. */
2703 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2704 unique line tables, so we maintain a separate table of all .debug_line
2705 derived entries to support the sharing.
2706 All the quick functions need is the list of file names. We discard the
2707 line_header when we're done and don't need to record it here. */
2708 struct quick_file_names
2710 /* The data used to construct the hash key. */
2711 struct stmt_list_hash hash
;
2713 /* The number of entries in file_names, real_names. */
2714 unsigned int num_file_names
;
2716 /* The file names from the line table, after being run through
2718 const char **file_names
;
2720 /* The file names from the line table after being run through
2721 gdb_realpath. These are computed lazily. */
2722 const char **real_names
;
2725 /* When using the index (and thus not using psymtabs), each CU has an
2726 object of this type. This is used to hold information needed by
2727 the various "quick" methods. */
2728 struct dwarf2_per_cu_quick_data
2730 /* The file table. This can be NULL if there was no file table
2731 or it's currently not read in.
2732 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2733 struct quick_file_names
*file_names
;
2735 /* The corresponding symbol table. This is NULL if symbols for this
2736 CU have not yet been read. */
2737 struct compunit_symtab
*compunit_symtab
;
2739 /* A temporary mark bit used when iterating over all CUs in
2740 expand_symtabs_matching. */
2741 unsigned int mark
: 1;
2743 /* True if we've tried to read the file table and found there isn't one.
2744 There will be no point in trying to read it again next time. */
2745 unsigned int no_file_data
: 1;
2748 /* Utility hash function for a stmt_list_hash. */
2751 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2755 if (stmt_list_hash
->dwo_unit
!= NULL
)
2756 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2757 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2761 /* Utility equality function for a stmt_list_hash. */
2764 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2765 const struct stmt_list_hash
*rhs
)
2767 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2769 if (lhs
->dwo_unit
!= NULL
2770 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2773 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2776 /* Hash function for a quick_file_names. */
2779 hash_file_name_entry (const void *e
)
2781 const struct quick_file_names
*file_data
2782 = (const struct quick_file_names
*) e
;
2784 return hash_stmt_list_entry (&file_data
->hash
);
2787 /* Equality function for a quick_file_names. */
2790 eq_file_name_entry (const void *a
, const void *b
)
2792 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2793 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2795 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2798 /* Delete function for a quick_file_names. */
2801 delete_file_name_entry (void *e
)
2803 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2806 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2808 xfree ((void*) file_data
->file_names
[i
]);
2809 if (file_data
->real_names
)
2810 xfree ((void*) file_data
->real_names
[i
]);
2813 /* The space for the struct itself lives on objfile_obstack,
2814 so we don't free it here. */
2817 /* Create a quick_file_names hash table. */
2820 create_quick_file_names_table (unsigned int nr_initial_entries
)
2822 return htab_create_alloc (nr_initial_entries
,
2823 hash_file_name_entry
, eq_file_name_entry
,
2824 delete_file_name_entry
, xcalloc
, xfree
);
2827 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2828 have to be created afterwards. You should call age_cached_comp_units after
2829 processing PER_CU->CU. dw2_setup must have been already called. */
2832 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2834 if (per_cu
->is_debug_types
)
2835 load_full_type_unit (per_cu
);
2837 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2839 if (per_cu
->cu
== NULL
)
2840 return; /* Dummy CU. */
2842 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2845 /* Read in the symbols for PER_CU. */
2848 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2850 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2852 /* Skip type_unit_groups, reading the type units they contain
2853 is handled elsewhere. */
2854 if (IS_TYPE_UNIT_GROUP (per_cu
))
2857 /* The destructor of dwarf2_queue_guard frees any entries left on
2858 the queue. After this point we're guaranteed to leave this function
2859 with the dwarf queue empty. */
2860 dwarf2_queue_guard q_guard
;
2862 if (dwarf2_per_objfile
->using_index
2863 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2864 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2866 queue_comp_unit (per_cu
, language_minimal
);
2867 load_cu (per_cu
, skip_partial
);
2869 /* If we just loaded a CU from a DWO, and we're working with an index
2870 that may badly handle TUs, load all the TUs in that DWO as well.
2871 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2872 if (!per_cu
->is_debug_types
2873 && per_cu
->cu
!= NULL
2874 && per_cu
->cu
->dwo_unit
!= NULL
2875 && dwarf2_per_objfile
->index_table
!= NULL
2876 && dwarf2_per_objfile
->index_table
->version
<= 7
2877 /* DWP files aren't supported yet. */
2878 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2879 queue_and_load_all_dwo_tus (per_cu
);
2882 process_queue (dwarf2_per_objfile
);
2884 /* Age the cache, releasing compilation units that have not
2885 been used recently. */
2886 age_cached_comp_units (dwarf2_per_objfile
);
2889 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2890 the objfile from which this CU came. Returns the resulting symbol
2893 static struct compunit_symtab
*
2894 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2896 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2898 gdb_assert (dwarf2_per_objfile
->using_index
);
2899 if (!per_cu
->v
.quick
->compunit_symtab
)
2901 free_cached_comp_units
freer (dwarf2_per_objfile
);
2902 scoped_restore decrementer
= increment_reading_symtab ();
2903 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2904 process_cu_includes (dwarf2_per_objfile
);
2907 return per_cu
->v
.quick
->compunit_symtab
;
2910 /* See declaration. */
2912 dwarf2_per_cu_data
*
2913 dwarf2_per_objfile::get_cutu (int index
)
2915 if (index
>= this->all_comp_units
.size ())
2917 index
-= this->all_comp_units
.size ();
2918 gdb_assert (index
< this->all_type_units
.size ());
2919 return &this->all_type_units
[index
]->per_cu
;
2922 return this->all_comp_units
[index
];
2925 /* See declaration. */
2927 dwarf2_per_cu_data
*
2928 dwarf2_per_objfile::get_cu (int index
)
2930 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2932 return this->all_comp_units
[index
];
2935 /* See declaration. */
2938 dwarf2_per_objfile::get_tu (int index
)
2940 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2942 return this->all_type_units
[index
];
2945 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2946 objfile_obstack, and constructed with the specified field
2949 static dwarf2_per_cu_data
*
2950 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2951 struct dwarf2_section_info
*section
,
2953 sect_offset sect_off
, ULONGEST length
)
2955 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2956 dwarf2_per_cu_data
*the_cu
2957 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2958 struct dwarf2_per_cu_data
);
2959 the_cu
->sect_off
= sect_off
;
2960 the_cu
->length
= length
;
2961 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2962 the_cu
->section
= section
;
2963 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2964 struct dwarf2_per_cu_quick_data
);
2965 the_cu
->is_dwz
= is_dwz
;
2969 /* A helper for create_cus_from_index that handles a given list of
2973 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2974 const gdb_byte
*cu_list
, offset_type n_elements
,
2975 struct dwarf2_section_info
*section
,
2978 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2980 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2982 sect_offset sect_off
2983 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2984 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2987 dwarf2_per_cu_data
*per_cu
2988 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2990 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
2994 /* Read the CU list from the mapped index, and use it to create all
2995 the CU objects for this objfile. */
2998 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2999 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3000 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3002 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
3003 dwarf2_per_objfile
->all_comp_units
.reserve
3004 ((cu_list_elements
+ dwz_elements
) / 2);
3006 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3007 &dwarf2_per_objfile
->info
, 0);
3009 if (dwz_elements
== 0)
3012 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3013 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
3017 /* Create the signatured type hash table from the index. */
3020 create_signatured_type_table_from_index
3021 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3022 struct dwarf2_section_info
*section
,
3023 const gdb_byte
*bytes
,
3024 offset_type elements
)
3026 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3028 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3029 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
3031 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3033 for (offset_type i
= 0; i
< elements
; i
+= 3)
3035 struct signatured_type
*sig_type
;
3038 cu_offset type_offset_in_tu
;
3040 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3041 sect_offset sect_off
3042 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3044 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3046 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3049 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3050 struct signatured_type
);
3051 sig_type
->signature
= signature
;
3052 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3053 sig_type
->per_cu
.is_debug_types
= 1;
3054 sig_type
->per_cu
.section
= section
;
3055 sig_type
->per_cu
.sect_off
= sect_off
;
3056 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3057 sig_type
->per_cu
.v
.quick
3058 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3059 struct dwarf2_per_cu_quick_data
);
3061 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3064 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3067 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3070 /* Create the signatured type hash table from .debug_names. */
3073 create_signatured_type_table_from_debug_names
3074 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3075 const mapped_debug_names
&map
,
3076 struct dwarf2_section_info
*section
,
3077 struct dwarf2_section_info
*abbrev_section
)
3079 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3081 dwarf2_read_section (objfile
, section
);
3082 dwarf2_read_section (objfile
, abbrev_section
);
3084 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3085 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
3087 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3089 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3091 struct signatured_type
*sig_type
;
3094 sect_offset sect_off
3095 = (sect_offset
) (extract_unsigned_integer
3096 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3098 map
.dwarf5_byte_order
));
3100 comp_unit_head cu_header
;
3101 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3103 section
->buffer
+ to_underlying (sect_off
),
3106 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3107 struct signatured_type
);
3108 sig_type
->signature
= cu_header
.signature
;
3109 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3110 sig_type
->per_cu
.is_debug_types
= 1;
3111 sig_type
->per_cu
.section
= section
;
3112 sig_type
->per_cu
.sect_off
= sect_off
;
3113 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3114 sig_type
->per_cu
.v
.quick
3115 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3116 struct dwarf2_per_cu_quick_data
);
3118 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3121 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3124 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3127 /* Read the address map data from the mapped index, and use it to
3128 populate the objfile's psymtabs_addrmap. */
3131 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3132 struct mapped_index
*index
)
3134 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3135 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3136 const gdb_byte
*iter
, *end
;
3137 struct addrmap
*mutable_map
;
3140 auto_obstack temp_obstack
;
3142 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3144 iter
= index
->address_table
.data ();
3145 end
= iter
+ index
->address_table
.size ();
3147 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3151 ULONGEST hi
, lo
, cu_index
;
3152 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3154 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3156 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3161 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
3162 hex_string (lo
), hex_string (hi
));
3166 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
3168 complaint (_(".gdb_index address table has invalid CU number %u"),
3169 (unsigned) cu_index
);
3173 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
3174 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
3175 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3176 dwarf2_per_objfile
->get_cu (cu_index
));
3179 objfile
->partial_symtabs
->psymtabs_addrmap
3180 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3183 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3184 populate the objfile's psymtabs_addrmap. */
3187 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3188 struct dwarf2_section_info
*section
)
3190 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3191 bfd
*abfd
= objfile
->obfd
;
3192 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3193 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3194 SECT_OFF_TEXT (objfile
));
3196 auto_obstack temp_obstack
;
3197 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3199 std::unordered_map
<sect_offset
,
3200 dwarf2_per_cu_data
*,
3201 gdb::hash_enum
<sect_offset
>>
3202 debug_info_offset_to_per_cu
;
3203 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3205 const auto insertpair
3206 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3207 if (!insertpair
.second
)
3209 warning (_("Section .debug_aranges in %s has duplicate "
3210 "debug_info_offset %s, ignoring .debug_aranges."),
3211 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3216 dwarf2_read_section (objfile
, section
);
3218 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3220 const gdb_byte
*addr
= section
->buffer
;
3222 while (addr
< section
->buffer
+ section
->size
)
3224 const gdb_byte
*const entry_addr
= addr
;
3225 unsigned int bytes_read
;
3227 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3231 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3232 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3233 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3234 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3236 warning (_("Section .debug_aranges in %s entry at offset %s "
3237 "length %s exceeds section length %s, "
3238 "ignoring .debug_aranges."),
3239 objfile_name (objfile
),
3240 plongest (entry_addr
- section
->buffer
),
3241 plongest (bytes_read
+ entry_length
),
3242 pulongest (section
->size
));
3246 /* The version number. */
3247 const uint16_t version
= read_2_bytes (abfd
, addr
);
3251 warning (_("Section .debug_aranges in %s entry at offset %s "
3252 "has unsupported version %d, ignoring .debug_aranges."),
3253 objfile_name (objfile
),
3254 plongest (entry_addr
- section
->buffer
), version
);
3258 const uint64_t debug_info_offset
3259 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3260 addr
+= offset_size
;
3261 const auto per_cu_it
3262 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3263 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3265 warning (_("Section .debug_aranges in %s entry at offset %s "
3266 "debug_info_offset %s does not exists, "
3267 "ignoring .debug_aranges."),
3268 objfile_name (objfile
),
3269 plongest (entry_addr
- section
->buffer
),
3270 pulongest (debug_info_offset
));
3273 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3275 const uint8_t address_size
= *addr
++;
3276 if (address_size
< 1 || address_size
> 8)
3278 warning (_("Section .debug_aranges in %s entry at offset %s "
3279 "address_size %u is invalid, ignoring .debug_aranges."),
3280 objfile_name (objfile
),
3281 plongest (entry_addr
- section
->buffer
), address_size
);
3285 const uint8_t segment_selector_size
= *addr
++;
3286 if (segment_selector_size
!= 0)
3288 warning (_("Section .debug_aranges in %s entry at offset %s "
3289 "segment_selector_size %u is not supported, "
3290 "ignoring .debug_aranges."),
3291 objfile_name (objfile
),
3292 plongest (entry_addr
- section
->buffer
),
3293 segment_selector_size
);
3297 /* Must pad to an alignment boundary that is twice the address
3298 size. It is undocumented by the DWARF standard but GCC does
3300 for (size_t padding
= ((-(addr
- section
->buffer
))
3301 & (2 * address_size
- 1));
3302 padding
> 0; padding
--)
3305 warning (_("Section .debug_aranges in %s entry at offset %s "
3306 "padding is not zero, ignoring .debug_aranges."),
3307 objfile_name (objfile
),
3308 plongest (entry_addr
- section
->buffer
));
3314 if (addr
+ 2 * address_size
> entry_end
)
3316 warning (_("Section .debug_aranges in %s entry at offset %s "
3317 "address list is not properly terminated, "
3318 "ignoring .debug_aranges."),
3319 objfile_name (objfile
),
3320 plongest (entry_addr
- section
->buffer
));
3323 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3325 addr
+= address_size
;
3326 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3328 addr
+= address_size
;
3329 if (start
== 0 && length
== 0)
3331 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3333 /* Symbol was eliminated due to a COMDAT group. */
3336 ULONGEST end
= start
+ length
;
3337 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
3339 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
3341 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3345 objfile
->partial_symtabs
->psymtabs_addrmap
3346 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3349 /* Find a slot in the mapped index INDEX for the object named NAME.
3350 If NAME is found, set *VEC_OUT to point to the CU vector in the
3351 constant pool and return true. If NAME cannot be found, return
3355 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3356 offset_type
**vec_out
)
3359 offset_type slot
, step
;
3360 int (*cmp
) (const char *, const char *);
3362 gdb::unique_xmalloc_ptr
<char> without_params
;
3363 if (current_language
->la_language
== language_cplus
3364 || current_language
->la_language
== language_fortran
3365 || current_language
->la_language
== language_d
)
3367 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3370 if (strchr (name
, '(') != NULL
)
3372 without_params
= cp_remove_params (name
);
3374 if (without_params
!= NULL
)
3375 name
= without_params
.get ();
3379 /* Index version 4 did not support case insensitive searches. But the
3380 indices for case insensitive languages are built in lowercase, therefore
3381 simulate our NAME being searched is also lowercased. */
3382 hash
= mapped_index_string_hash ((index
->version
== 4
3383 && case_sensitivity
== case_sensitive_off
3384 ? 5 : index
->version
),
3387 slot
= hash
& (index
->symbol_table
.size () - 1);
3388 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3389 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3395 const auto &bucket
= index
->symbol_table
[slot
];
3396 if (bucket
.name
== 0 && bucket
.vec
== 0)
3399 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3400 if (!cmp (name
, str
))
3402 *vec_out
= (offset_type
*) (index
->constant_pool
3403 + MAYBE_SWAP (bucket
.vec
));
3407 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3411 /* A helper function that reads the .gdb_index from BUFFER and fills
3412 in MAP. FILENAME is the name of the file containing the data;
3413 it is used for error reporting. DEPRECATED_OK is true if it is
3414 ok to use deprecated sections.
3416 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3417 out parameters that are filled in with information about the CU and
3418 TU lists in the section.
3420 Returns true if all went well, false otherwise. */
3423 read_gdb_index_from_buffer (struct objfile
*objfile
,
3424 const char *filename
,
3426 gdb::array_view
<const gdb_byte
> buffer
,
3427 struct mapped_index
*map
,
3428 const gdb_byte
**cu_list
,
3429 offset_type
*cu_list_elements
,
3430 const gdb_byte
**types_list
,
3431 offset_type
*types_list_elements
)
3433 const gdb_byte
*addr
= &buffer
[0];
3435 /* Version check. */
3436 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
3437 /* Versions earlier than 3 emitted every copy of a psymbol. This
3438 causes the index to behave very poorly for certain requests. Version 3
3439 contained incomplete addrmap. So, it seems better to just ignore such
3443 static int warning_printed
= 0;
3444 if (!warning_printed
)
3446 warning (_("Skipping obsolete .gdb_index section in %s."),
3448 warning_printed
= 1;
3452 /* Index version 4 uses a different hash function than index version
3455 Versions earlier than 6 did not emit psymbols for inlined
3456 functions. Using these files will cause GDB not to be able to
3457 set breakpoints on inlined functions by name, so we ignore these
3458 indices unless the user has done
3459 "set use-deprecated-index-sections on". */
3460 if (version
< 6 && !deprecated_ok
)
3462 static int warning_printed
= 0;
3463 if (!warning_printed
)
3466 Skipping deprecated .gdb_index section in %s.\n\
3467 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3468 to use the section anyway."),
3470 warning_printed
= 1;
3474 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3475 of the TU (for symbols coming from TUs),
3476 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3477 Plus gold-generated indices can have duplicate entries for global symbols,
3478 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3479 These are just performance bugs, and we can't distinguish gdb-generated
3480 indices from gold-generated ones, so issue no warning here. */
3482 /* Indexes with higher version than the one supported by GDB may be no
3483 longer backward compatible. */
3487 map
->version
= version
;
3489 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3492 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3493 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3497 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3498 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3499 - MAYBE_SWAP (metadata
[i
]))
3503 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3504 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3506 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3509 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3510 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3512 = gdb::array_view
<mapped_index::symbol_table_slot
>
3513 ((mapped_index::symbol_table_slot
*) symbol_table
,
3514 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3517 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3522 /* Callback types for dwarf2_read_gdb_index. */
3524 typedef gdb::function_view
3525 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
3526 get_gdb_index_contents_ftype
;
3527 typedef gdb::function_view
3528 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3529 get_gdb_index_contents_dwz_ftype
;
3531 /* Read .gdb_index. If everything went ok, initialize the "quick"
3532 elements of all the CUs and return 1. Otherwise, return 0. */
3535 dwarf2_read_gdb_index
3536 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3537 get_gdb_index_contents_ftype get_gdb_index_contents
,
3538 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3540 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3541 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3542 struct dwz_file
*dwz
;
3543 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3545 gdb::array_view
<const gdb_byte
> main_index_contents
3546 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3548 if (main_index_contents
.empty ())
3551 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3552 if (!read_gdb_index_from_buffer (objfile
, objfile_name (objfile
),
3553 use_deprecated_index_sections
,
3554 main_index_contents
, map
.get (), &cu_list
,
3555 &cu_list_elements
, &types_list
,
3556 &types_list_elements
))
3559 /* Don't use the index if it's empty. */
3560 if (map
->symbol_table
.empty ())
3563 /* If there is a .dwz file, read it so we can get its CU list as
3565 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3568 struct mapped_index dwz_map
;
3569 const gdb_byte
*dwz_types_ignore
;
3570 offset_type dwz_types_elements_ignore
;
3572 gdb::array_view
<const gdb_byte
> dwz_index_content
3573 = get_gdb_index_contents_dwz (objfile
, dwz
);
3575 if (dwz_index_content
.empty ())
3578 if (!read_gdb_index_from_buffer (objfile
,
3579 bfd_get_filename (dwz
->dwz_bfd
), 1,
3580 dwz_index_content
, &dwz_map
,
3581 &dwz_list
, &dwz_list_elements
,
3583 &dwz_types_elements_ignore
))
3585 warning (_("could not read '.gdb_index' section from %s; skipping"),
3586 bfd_get_filename (dwz
->dwz_bfd
));
3591 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3592 dwz_list
, dwz_list_elements
);
3594 if (types_list_elements
)
3596 /* We can only handle a single .debug_types when we have an
3598 if (dwarf2_per_objfile
->types
.size () != 1)
3601 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
3603 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3604 types_list
, types_list_elements
);
3607 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3609 dwarf2_per_objfile
->index_table
= std::move (map
);
3610 dwarf2_per_objfile
->using_index
= 1;
3611 dwarf2_per_objfile
->quick_file_names_table
=
3612 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3617 /* die_reader_func for dw2_get_file_names. */
3620 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3621 const gdb_byte
*info_ptr
,
3622 struct die_info
*comp_unit_die
,
3626 struct dwarf2_cu
*cu
= reader
->cu
;
3627 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3628 struct dwarf2_per_objfile
*dwarf2_per_objfile
3629 = cu
->per_cu
->dwarf2_per_objfile
;
3630 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3631 struct dwarf2_per_cu_data
*lh_cu
;
3632 struct attribute
*attr
;
3635 struct quick_file_names
*qfn
;
3637 gdb_assert (! this_cu
->is_debug_types
);
3639 /* Our callers never want to match partial units -- instead they
3640 will match the enclosing full CU. */
3641 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3643 this_cu
->v
.quick
->no_file_data
= 1;
3651 sect_offset line_offset
{};
3653 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3656 struct quick_file_names find_entry
;
3658 line_offset
= (sect_offset
) DW_UNSND (attr
);
3660 /* We may have already read in this line header (TU line header sharing).
3661 If we have we're done. */
3662 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3663 find_entry
.hash
.line_sect_off
= line_offset
;
3664 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3665 &find_entry
, INSERT
);
3668 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3672 lh
= dwarf_decode_line_header (line_offset
, cu
);
3676 lh_cu
->v
.quick
->no_file_data
= 1;
3680 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3681 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3682 qfn
->hash
.line_sect_off
= line_offset
;
3683 gdb_assert (slot
!= NULL
);
3686 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3688 qfn
->num_file_names
= lh
->file_names
.size ();
3690 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3691 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3692 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3693 qfn
->real_names
= NULL
;
3695 lh_cu
->v
.quick
->file_names
= qfn
;
3698 /* A helper for the "quick" functions which attempts to read the line
3699 table for THIS_CU. */
3701 static struct quick_file_names
*
3702 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3704 /* This should never be called for TUs. */
3705 gdb_assert (! this_cu
->is_debug_types
);
3706 /* Nor type unit groups. */
3707 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3709 if (this_cu
->v
.quick
->file_names
!= NULL
)
3710 return this_cu
->v
.quick
->file_names
;
3711 /* If we know there is no line data, no point in looking again. */
3712 if (this_cu
->v
.quick
->no_file_data
)
3715 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3717 if (this_cu
->v
.quick
->no_file_data
)
3719 return this_cu
->v
.quick
->file_names
;
3722 /* A helper for the "quick" functions which computes and caches the
3723 real path for a given file name from the line table. */
3726 dw2_get_real_path (struct objfile
*objfile
,
3727 struct quick_file_names
*qfn
, int index
)
3729 if (qfn
->real_names
== NULL
)
3730 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3731 qfn
->num_file_names
, const char *);
3733 if (qfn
->real_names
[index
] == NULL
)
3734 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3736 return qfn
->real_names
[index
];
3739 static struct symtab
*
3740 dw2_find_last_source_symtab (struct objfile
*objfile
)
3742 struct dwarf2_per_objfile
*dwarf2_per_objfile
3743 = get_dwarf2_per_objfile (objfile
);
3744 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3745 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3750 return compunit_primary_filetab (cust
);
3753 /* Traversal function for dw2_forget_cached_source_info. */
3756 dw2_free_cached_file_names (void **slot
, void *info
)
3758 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3760 if (file_data
->real_names
)
3764 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3766 xfree ((void*) file_data
->real_names
[i
]);
3767 file_data
->real_names
[i
] = NULL
;
3775 dw2_forget_cached_source_info (struct objfile
*objfile
)
3777 struct dwarf2_per_objfile
*dwarf2_per_objfile
3778 = get_dwarf2_per_objfile (objfile
);
3780 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3781 dw2_free_cached_file_names
, NULL
);
3784 /* Helper function for dw2_map_symtabs_matching_filename that expands
3785 the symtabs and calls the iterator. */
3788 dw2_map_expand_apply (struct objfile
*objfile
,
3789 struct dwarf2_per_cu_data
*per_cu
,
3790 const char *name
, const char *real_path
,
3791 gdb::function_view
<bool (symtab
*)> callback
)
3793 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3795 /* Don't visit already-expanded CUs. */
3796 if (per_cu
->v
.quick
->compunit_symtab
)
3799 /* This may expand more than one symtab, and we want to iterate over
3801 dw2_instantiate_symtab (per_cu
, false);
3803 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3804 last_made
, callback
);
3807 /* Implementation of the map_symtabs_matching_filename method. */
3810 dw2_map_symtabs_matching_filename
3811 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3812 gdb::function_view
<bool (symtab
*)> callback
)
3814 const char *name_basename
= lbasename (name
);
3815 struct dwarf2_per_objfile
*dwarf2_per_objfile
3816 = get_dwarf2_per_objfile (objfile
);
3818 /* The rule is CUs specify all the files, including those used by
3819 any TU, so there's no need to scan TUs here. */
3821 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3823 /* We only need to look at symtabs not already expanded. */
3824 if (per_cu
->v
.quick
->compunit_symtab
)
3827 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3828 if (file_data
== NULL
)
3831 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3833 const char *this_name
= file_data
->file_names
[j
];
3834 const char *this_real_name
;
3836 if (compare_filenames_for_search (this_name
, name
))
3838 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3844 /* Before we invoke realpath, which can get expensive when many
3845 files are involved, do a quick comparison of the basenames. */
3846 if (! basenames_may_differ
3847 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3850 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3851 if (compare_filenames_for_search (this_real_name
, name
))
3853 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3859 if (real_path
!= NULL
)
3861 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3862 gdb_assert (IS_ABSOLUTE_PATH (name
));
3863 if (this_real_name
!= NULL
3864 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3866 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3878 /* Struct used to manage iterating over all CUs looking for a symbol. */
3880 struct dw2_symtab_iterator
3882 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3883 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3884 /* If set, only look for symbols that match that block. Valid values are
3885 GLOBAL_BLOCK and STATIC_BLOCK. */
3886 gdb::optional
<int> block_index
;
3887 /* The kind of symbol we're looking for. */
3889 /* The list of CUs from the index entry of the symbol,
3890 or NULL if not found. */
3892 /* The next element in VEC to look at. */
3894 /* The number of elements in VEC, or zero if there is no match. */
3896 /* Have we seen a global version of the symbol?
3897 If so we can ignore all further global instances.
3898 This is to work around gold/15646, inefficient gold-generated
3903 /* Initialize the index symtab iterator ITER. */
3906 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3907 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3908 gdb::optional
<int> block_index
,
3912 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3913 iter
->block_index
= block_index
;
3914 iter
->domain
= domain
;
3916 iter
->global_seen
= 0;
3918 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3920 /* index is NULL if OBJF_READNOW. */
3921 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3922 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3930 /* Return the next matching CU or NULL if there are no more. */
3932 static struct dwarf2_per_cu_data
*
3933 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3935 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3937 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3939 offset_type cu_index_and_attrs
=
3940 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3941 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3942 gdb_index_symbol_kind symbol_kind
=
3943 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3944 /* Only check the symbol attributes if they're present.
3945 Indices prior to version 7 don't record them,
3946 and indices >= 7 may elide them for certain symbols
3947 (gold does this). */
3949 (dwarf2_per_objfile
->index_table
->version
>= 7
3950 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3952 /* Don't crash on bad data. */
3953 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3954 + dwarf2_per_objfile
->all_type_units
.size ()))
3956 complaint (_(".gdb_index entry has bad CU index"
3958 objfile_name (dwarf2_per_objfile
->objfile
));
3962 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3964 /* Skip if already read in. */
3965 if (per_cu
->v
.quick
->compunit_symtab
)
3968 /* Check static vs global. */
3971 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3973 if (iter
->block_index
.has_value ())
3975 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3977 if (is_static
!= want_static
)
3981 /* Work around gold/15646. */
3982 if (!is_static
&& iter
->global_seen
)
3985 iter
->global_seen
= 1;
3988 /* Only check the symbol's kind if it has one. */
3991 switch (iter
->domain
)
3994 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3995 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3996 /* Some types are also in VAR_DOMAIN. */
3997 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4001 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4005 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4020 static struct compunit_symtab
*
4021 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
4022 const char *name
, domain_enum domain
)
4024 struct compunit_symtab
*stab_best
= NULL
;
4025 struct dwarf2_per_objfile
*dwarf2_per_objfile
4026 = get_dwarf2_per_objfile (objfile
);
4028 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4030 struct dw2_symtab_iterator iter
;
4031 struct dwarf2_per_cu_data
*per_cu
;
4033 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
4035 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4037 struct symbol
*sym
, *with_opaque
= NULL
;
4038 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
4039 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4040 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4042 sym
= block_find_symbol (block
, name
, domain
,
4043 block_find_non_opaque_type_preferred
,
4046 /* Some caution must be observed with overloaded functions
4047 and methods, since the index will not contain any overload
4048 information (but NAME might contain it). */
4051 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4053 if (with_opaque
!= NULL
4054 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4057 /* Keep looking through other CUs. */
4064 dw2_print_stats (struct objfile
*objfile
)
4066 struct dwarf2_per_objfile
*dwarf2_per_objfile
4067 = get_dwarf2_per_objfile (objfile
);
4068 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
4069 + dwarf2_per_objfile
->all_type_units
.size ());
4072 for (int i
= 0; i
< total
; ++i
)
4074 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4076 if (!per_cu
->v
.quick
->compunit_symtab
)
4079 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4080 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4083 /* This dumps minimal information about the index.
4084 It is called via "mt print objfiles".
4085 One use is to verify .gdb_index has been loaded by the
4086 gdb.dwarf2/gdb-index.exp testcase. */
4089 dw2_dump (struct objfile
*objfile
)
4091 struct dwarf2_per_objfile
*dwarf2_per_objfile
4092 = get_dwarf2_per_objfile (objfile
);
4094 gdb_assert (dwarf2_per_objfile
->using_index
);
4095 printf_filtered (".gdb_index:");
4096 if (dwarf2_per_objfile
->index_table
!= NULL
)
4098 printf_filtered (" version %d\n",
4099 dwarf2_per_objfile
->index_table
->version
);
4102 printf_filtered (" faked for \"readnow\"\n");
4103 printf_filtered ("\n");
4107 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4108 const char *func_name
)
4110 struct dwarf2_per_objfile
*dwarf2_per_objfile
4111 = get_dwarf2_per_objfile (objfile
);
4113 struct dw2_symtab_iterator iter
;
4114 struct dwarf2_per_cu_data
*per_cu
;
4116 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
4118 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4119 dw2_instantiate_symtab (per_cu
, false);
4124 dw2_expand_all_symtabs (struct objfile
*objfile
)
4126 struct dwarf2_per_objfile
*dwarf2_per_objfile
4127 = get_dwarf2_per_objfile (objfile
);
4128 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
4129 + dwarf2_per_objfile
->all_type_units
.size ());
4131 for (int i
= 0; i
< total_units
; ++i
)
4133 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4135 /* We don't want to directly expand a partial CU, because if we
4136 read it with the wrong language, then assertion failures can
4137 be triggered later on. See PR symtab/23010. So, tell
4138 dw2_instantiate_symtab to skip partial CUs -- any important
4139 partial CU will be read via DW_TAG_imported_unit anyway. */
4140 dw2_instantiate_symtab (per_cu
, true);
4145 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4146 const char *fullname
)
4148 struct dwarf2_per_objfile
*dwarf2_per_objfile
4149 = get_dwarf2_per_objfile (objfile
);
4151 /* We don't need to consider type units here.
4152 This is only called for examining code, e.g. expand_line_sal.
4153 There can be an order of magnitude (or more) more type units
4154 than comp units, and we avoid them if we can. */
4156 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4158 /* We only need to look at symtabs not already expanded. */
4159 if (per_cu
->v
.quick
->compunit_symtab
)
4162 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4163 if (file_data
== NULL
)
4166 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4168 const char *this_fullname
= file_data
->file_names
[j
];
4170 if (filename_cmp (this_fullname
, fullname
) == 0)
4172 dw2_instantiate_symtab (per_cu
, false);
4180 dw2_map_matching_symbols (struct objfile
*objfile
,
4181 const char * name
, domain_enum domain
,
4183 int (*callback
) (const struct block
*,
4184 struct symbol
*, void *),
4185 void *data
, symbol_name_match_type match
,
4186 symbol_compare_ftype
*ordered_compare
)
4188 /* Currently unimplemented; used for Ada. The function can be called if the
4189 current language is Ada for a non-Ada objfile using GNU index. As Ada
4190 does not look for non-Ada symbols this function should just return. */
4193 /* Symbol name matcher for .gdb_index names.
4195 Symbol names in .gdb_index have a few particularities:
4197 - There's no indication of which is the language of each symbol.
4199 Since each language has its own symbol name matching algorithm,
4200 and we don't know which language is the right one, we must match
4201 each symbol against all languages. This would be a potential
4202 performance problem if it were not mitigated by the
4203 mapped_index::name_components lookup table, which significantly
4204 reduces the number of times we need to call into this matcher,
4205 making it a non-issue.
4207 - Symbol names in the index have no overload (parameter)
4208 information. I.e., in C++, "foo(int)" and "foo(long)" both
4209 appear as "foo" in the index, for example.
4211 This means that the lookup names passed to the symbol name
4212 matcher functions must have no parameter information either
4213 because (e.g.) symbol search name "foo" does not match
4214 lookup-name "foo(int)" [while swapping search name for lookup
4217 class gdb_index_symbol_name_matcher
4220 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4221 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4223 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4224 Returns true if any matcher matches. */
4225 bool matches (const char *symbol_name
);
4228 /* A reference to the lookup name we're matching against. */
4229 const lookup_name_info
&m_lookup_name
;
4231 /* A vector holding all the different symbol name matchers, for all
4233 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4236 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4237 (const lookup_name_info
&lookup_name
)
4238 : m_lookup_name (lookup_name
)
4240 /* Prepare the vector of comparison functions upfront, to avoid
4241 doing the same work for each symbol. Care is taken to avoid
4242 matching with the same matcher more than once if/when multiple
4243 languages use the same matcher function. */
4244 auto &matchers
= m_symbol_name_matcher_funcs
;
4245 matchers
.reserve (nr_languages
);
4247 matchers
.push_back (default_symbol_name_matcher
);
4249 for (int i
= 0; i
< nr_languages
; i
++)
4251 const language_defn
*lang
= language_def ((enum language
) i
);
4252 symbol_name_matcher_ftype
*name_matcher
4253 = get_symbol_name_matcher (lang
, m_lookup_name
);
4255 /* Don't insert the same comparison routine more than once.
4256 Note that we do this linear walk instead of a seemingly
4257 cheaper sorted insert, or use a std::set or something like
4258 that, because relative order of function addresses is not
4259 stable. This is not a problem in practice because the number
4260 of supported languages is low, and the cost here is tiny
4261 compared to the number of searches we'll do afterwards using
4263 if (name_matcher
!= default_symbol_name_matcher
4264 && (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4265 == matchers
.end ()))
4266 matchers
.push_back (name_matcher
);
4271 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4273 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4274 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4280 /* Starting from a search name, return the string that finds the upper
4281 bound of all strings that start with SEARCH_NAME in a sorted name
4282 list. Returns the empty string to indicate that the upper bound is
4283 the end of the list. */
4286 make_sort_after_prefix_name (const char *search_name
)
4288 /* When looking to complete "func", we find the upper bound of all
4289 symbols that start with "func" by looking for where we'd insert
4290 the closest string that would follow "func" in lexicographical
4291 order. Usually, that's "func"-with-last-character-incremented,
4292 i.e. "fund". Mind non-ASCII characters, though. Usually those
4293 will be UTF-8 multi-byte sequences, but we can't be certain.
4294 Especially mind the 0xff character, which is a valid character in
4295 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4296 rule out compilers allowing it in identifiers. Note that
4297 conveniently, strcmp/strcasecmp are specified to compare
4298 characters interpreted as unsigned char. So what we do is treat
4299 the whole string as a base 256 number composed of a sequence of
4300 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4301 to 0, and carries 1 to the following more-significant position.
4302 If the very first character in SEARCH_NAME ends up incremented
4303 and carries/overflows, then the upper bound is the end of the
4304 list. The string after the empty string is also the empty
4307 Some examples of this operation:
4309 SEARCH_NAME => "+1" RESULT
4313 "\xff" "a" "\xff" => "\xff" "b"
4318 Then, with these symbols for example:
4324 completing "func" looks for symbols between "func" and
4325 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4326 which finds "func" and "func1", but not "fund".
4330 funcÿ (Latin1 'ÿ' [0xff])
4334 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4335 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4339 ÿÿ (Latin1 'ÿ' [0xff])
4342 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4343 the end of the list.
4345 std::string after
= search_name
;
4346 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4348 if (!after
.empty ())
4349 after
.back () = (unsigned char) after
.back () + 1;
4353 /* See declaration. */
4355 std::pair
<std::vector
<name_component
>::const_iterator
,
4356 std::vector
<name_component
>::const_iterator
>
4357 mapped_index_base::find_name_components_bounds
4358 (const lookup_name_info
&lookup_name_without_params
) const
4361 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4364 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4366 /* Comparison function object for lower_bound that matches against a
4367 given symbol name. */
4368 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4371 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4372 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4373 return name_cmp (elem_name
, name
) < 0;
4376 /* Comparison function object for upper_bound that matches against a
4377 given symbol name. */
4378 auto lookup_compare_upper
= [&] (const char *name
,
4379 const name_component
&elem
)
4381 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4382 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4383 return name_cmp (name
, elem_name
) < 0;
4386 auto begin
= this->name_components
.begin ();
4387 auto end
= this->name_components
.end ();
4389 /* Find the lower bound. */
4392 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4395 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4398 /* Find the upper bound. */
4401 if (lookup_name_without_params
.completion_mode ())
4403 /* In completion mode, we want UPPER to point past all
4404 symbols names that have the same prefix. I.e., with
4405 these symbols, and completing "func":
4407 function << lower bound
4409 other_function << upper bound
4411 We find the upper bound by looking for the insertion
4412 point of "func"-with-last-character-incremented,
4414 std::string after
= make_sort_after_prefix_name (cplus
);
4417 return std::lower_bound (lower
, end
, after
.c_str (),
4418 lookup_compare_lower
);
4421 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4424 return {lower
, upper
};
4427 /* See declaration. */
4430 mapped_index_base::build_name_components ()
4432 if (!this->name_components
.empty ())
4435 this->name_components_casing
= case_sensitivity
;
4437 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4439 /* The code below only knows how to break apart components of C++
4440 symbol names (and other languages that use '::' as
4441 namespace/module separator). If we add support for wild matching
4442 to some language that uses some other operator (E.g., Ada, Go and
4443 D use '.'), then we'll need to try splitting the symbol name
4444 according to that language too. Note that Ada does support wild
4445 matching, but doesn't currently support .gdb_index. */
4446 auto count
= this->symbol_name_count ();
4447 for (offset_type idx
= 0; idx
< count
; idx
++)
4449 if (this->symbol_name_slot_invalid (idx
))
4452 const char *name
= this->symbol_name_at (idx
);
4454 /* Add each name component to the name component table. */
4455 unsigned int previous_len
= 0;
4456 for (unsigned int current_len
= cp_find_first_component (name
);
4457 name
[current_len
] != '\0';
4458 current_len
+= cp_find_first_component (name
+ current_len
))
4460 gdb_assert (name
[current_len
] == ':');
4461 this->name_components
.push_back ({previous_len
, idx
});
4462 /* Skip the '::'. */
4464 previous_len
= current_len
;
4466 this->name_components
.push_back ({previous_len
, idx
});
4469 /* Sort name_components elements by name. */
4470 auto name_comp_compare
= [&] (const name_component
&left
,
4471 const name_component
&right
)
4473 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4474 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4476 const char *left_name
= left_qualified
+ left
.name_offset
;
4477 const char *right_name
= right_qualified
+ right
.name_offset
;
4479 return name_cmp (left_name
, right_name
) < 0;
4482 std::sort (this->name_components
.begin (),
4483 this->name_components
.end (),
4487 /* Helper for dw2_expand_symtabs_matching that works with a
4488 mapped_index_base instead of the containing objfile. This is split
4489 to a separate function in order to be able to unit test the
4490 name_components matching using a mock mapped_index_base. For each
4491 symbol name that matches, calls MATCH_CALLBACK, passing it the
4492 symbol's index in the mapped_index_base symbol table. */
4495 dw2_expand_symtabs_matching_symbol
4496 (mapped_index_base
&index
,
4497 const lookup_name_info
&lookup_name_in
,
4498 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4499 enum search_domain kind
,
4500 gdb::function_view
<void (offset_type
)> match_callback
)
4502 lookup_name_info lookup_name_without_params
4503 = lookup_name_in
.make_ignore_params ();
4504 gdb_index_symbol_name_matcher lookup_name_matcher
4505 (lookup_name_without_params
);
4507 /* Build the symbol name component sorted vector, if we haven't
4509 index
.build_name_components ();
4511 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4513 /* Now for each symbol name in range, check to see if we have a name
4514 match, and if so, call the MATCH_CALLBACK callback. */
4516 /* The same symbol may appear more than once in the range though.
4517 E.g., if we're looking for symbols that complete "w", and we have
4518 a symbol named "w1::w2", we'll find the two name components for
4519 that same symbol in the range. To be sure we only call the
4520 callback once per symbol, we first collect the symbol name
4521 indexes that matched in a temporary vector and ignore
4523 std::vector
<offset_type
> matches
;
4524 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4526 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4528 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4530 if (!lookup_name_matcher
.matches (qualified
)
4531 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4534 matches
.push_back (bounds
.first
->idx
);
4537 std::sort (matches
.begin (), matches
.end ());
4539 /* Finally call the callback, once per match. */
4541 for (offset_type idx
: matches
)
4545 match_callback (idx
);
4550 /* Above we use a type wider than idx's for 'prev', since 0 and
4551 (offset_type)-1 are both possible values. */
4552 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4557 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4559 /* A mock .gdb_index/.debug_names-like name index table, enough to
4560 exercise dw2_expand_symtabs_matching_symbol, which works with the
4561 mapped_index_base interface. Builds an index from the symbol list
4562 passed as parameter to the constructor. */
4563 class mock_mapped_index
: public mapped_index_base
4566 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4567 : m_symbol_table (symbols
)
4570 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4572 /* Return the number of names in the symbol table. */
4573 size_t symbol_name_count () const override
4575 return m_symbol_table
.size ();
4578 /* Get the name of the symbol at IDX in the symbol table. */
4579 const char *symbol_name_at (offset_type idx
) const override
4581 return m_symbol_table
[idx
];
4585 gdb::array_view
<const char *> m_symbol_table
;
4588 /* Convenience function that converts a NULL pointer to a "<null>"
4589 string, to pass to print routines. */
4592 string_or_null (const char *str
)
4594 return str
!= NULL
? str
: "<null>";
4597 /* Check if a lookup_name_info built from
4598 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4599 index. EXPECTED_LIST is the list of expected matches, in expected
4600 matching order. If no match expected, then an empty list is
4601 specified. Returns true on success. On failure prints a warning
4602 indicating the file:line that failed, and returns false. */
4605 check_match (const char *file
, int line
,
4606 mock_mapped_index
&mock_index
,
4607 const char *name
, symbol_name_match_type match_type
,
4608 bool completion_mode
,
4609 std::initializer_list
<const char *> expected_list
)
4611 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4613 bool matched
= true;
4615 auto mismatch
= [&] (const char *expected_str
,
4618 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4619 "expected=\"%s\", got=\"%s\"\n"),
4621 (match_type
== symbol_name_match_type::FULL
4623 name
, string_or_null (expected_str
), string_or_null (got
));
4627 auto expected_it
= expected_list
.begin ();
4628 auto expected_end
= expected_list
.end ();
4630 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4632 [&] (offset_type idx
)
4634 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4635 const char *expected_str
4636 = expected_it
== expected_end
? NULL
: *expected_it
++;
4638 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4639 mismatch (expected_str
, matched_name
);
4642 const char *expected_str
4643 = expected_it
== expected_end
? NULL
: *expected_it
++;
4644 if (expected_str
!= NULL
)
4645 mismatch (expected_str
, NULL
);
4650 /* The symbols added to the mock mapped_index for testing (in
4652 static const char *test_symbols
[] = {
4661 "ns2::tmpl<int>::foo2",
4662 "(anonymous namespace)::A::B::C",
4664 /* These are used to check that the increment-last-char in the
4665 matching algorithm for completion doesn't match "t1_fund" when
4666 completing "t1_func". */
4672 /* A UTF-8 name with multi-byte sequences to make sure that
4673 cp-name-parser understands this as a single identifier ("função"
4674 is "function" in PT). */
4677 /* \377 (0xff) is Latin1 'ÿ'. */
4680 /* \377 (0xff) is Latin1 'ÿ'. */
4684 /* A name with all sorts of complications. Starts with "z" to make
4685 it easier for the completion tests below. */
4686 #define Z_SYM_NAME \
4687 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4688 "::tuple<(anonymous namespace)::ui*, " \
4689 "std::default_delete<(anonymous namespace)::ui>, void>"
4694 /* Returns true if the mapped_index_base::find_name_component_bounds
4695 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4696 in completion mode. */
4699 check_find_bounds_finds (mapped_index_base
&index
,
4700 const char *search_name
,
4701 gdb::array_view
<const char *> expected_syms
)
4703 lookup_name_info
lookup_name (search_name
,
4704 symbol_name_match_type::FULL
, true);
4706 auto bounds
= index
.find_name_components_bounds (lookup_name
);
4708 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4709 if (distance
!= expected_syms
.size ())
4712 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4714 auto nc_elem
= bounds
.first
+ exp_elem
;
4715 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4716 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4723 /* Test the lower-level mapped_index::find_name_component_bounds
4727 test_mapped_index_find_name_component_bounds ()
4729 mock_mapped_index
mock_index (test_symbols
);
4731 mock_index
.build_name_components ();
4733 /* Test the lower-level mapped_index::find_name_component_bounds
4734 method in completion mode. */
4736 static const char *expected_syms
[] = {
4741 SELF_CHECK (check_find_bounds_finds (mock_index
,
4742 "t1_func", expected_syms
));
4745 /* Check that the increment-last-char in the name matching algorithm
4746 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4748 static const char *expected_syms1
[] = {
4752 SELF_CHECK (check_find_bounds_finds (mock_index
,
4753 "\377", expected_syms1
));
4755 static const char *expected_syms2
[] = {
4758 SELF_CHECK (check_find_bounds_finds (mock_index
,
4759 "\377\377", expected_syms2
));
4763 /* Test dw2_expand_symtabs_matching_symbol. */
4766 test_dw2_expand_symtabs_matching_symbol ()
4768 mock_mapped_index
mock_index (test_symbols
);
4770 /* We let all tests run until the end even if some fails, for debug
4772 bool any_mismatch
= false;
4774 /* Create the expected symbols list (an initializer_list). Needed
4775 because lists have commas, and we need to pass them to CHECK,
4776 which is a macro. */
4777 #define EXPECT(...) { __VA_ARGS__ }
4779 /* Wrapper for check_match that passes down the current
4780 __FILE__/__LINE__. */
4781 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4782 any_mismatch |= !check_match (__FILE__, __LINE__, \
4784 NAME, MATCH_TYPE, COMPLETION_MODE, \
4787 /* Identity checks. */
4788 for (const char *sym
: test_symbols
)
4790 /* Should be able to match all existing symbols. */
4791 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4794 /* Should be able to match all existing symbols with
4796 std::string with_params
= std::string (sym
) + "(int)";
4797 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4800 /* Should be able to match all existing symbols with
4801 parameters and qualifiers. */
4802 with_params
= std::string (sym
) + " ( int ) const";
4803 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4806 /* This should really find sym, but cp-name-parser.y doesn't
4807 know about lvalue/rvalue qualifiers yet. */
4808 with_params
= std::string (sym
) + " ( int ) &&";
4809 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4813 /* Check that the name matching algorithm for completion doesn't get
4814 confused with Latin1 'ÿ' / 0xff. */
4816 static const char str
[] = "\377";
4817 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4818 EXPECT ("\377", "\377\377123"));
4821 /* Check that the increment-last-char in the matching algorithm for
4822 completion doesn't match "t1_fund" when completing "t1_func". */
4824 static const char str
[] = "t1_func";
4825 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4826 EXPECT ("t1_func", "t1_func1"));
4829 /* Check that completion mode works at each prefix of the expected
4832 static const char str
[] = "function(int)";
4833 size_t len
= strlen (str
);
4836 for (size_t i
= 1; i
< len
; i
++)
4838 lookup
.assign (str
, i
);
4839 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4840 EXPECT ("function"));
4844 /* While "w" is a prefix of both components, the match function
4845 should still only be called once. */
4847 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4849 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4853 /* Same, with a "complicated" symbol. */
4855 static const char str
[] = Z_SYM_NAME
;
4856 size_t len
= strlen (str
);
4859 for (size_t i
= 1; i
< len
; i
++)
4861 lookup
.assign (str
, i
);
4862 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4863 EXPECT (Z_SYM_NAME
));
4867 /* In FULL mode, an incomplete symbol doesn't match. */
4869 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4873 /* A complete symbol with parameters matches any overload, since the
4874 index has no overload info. */
4876 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4877 EXPECT ("std::zfunction", "std::zfunction2"));
4878 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4879 EXPECT ("std::zfunction", "std::zfunction2"));
4880 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4881 EXPECT ("std::zfunction", "std::zfunction2"));
4884 /* Check that whitespace is ignored appropriately. A symbol with a
4885 template argument list. */
4887 static const char expected
[] = "ns::foo<int>";
4888 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4890 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4894 /* Check that whitespace is ignored appropriately. A symbol with a
4895 template argument list that includes a pointer. */
4897 static const char expected
[] = "ns::foo<char*>";
4898 /* Try both completion and non-completion modes. */
4899 static const bool completion_mode
[2] = {false, true};
4900 for (size_t i
= 0; i
< 2; i
++)
4902 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4903 completion_mode
[i
], EXPECT (expected
));
4904 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4905 completion_mode
[i
], EXPECT (expected
));
4907 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4908 completion_mode
[i
], EXPECT (expected
));
4909 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4910 completion_mode
[i
], EXPECT (expected
));
4915 /* Check method qualifiers are ignored. */
4916 static const char expected
[] = "ns::foo<char*>";
4917 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4918 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4919 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4920 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4921 CHECK_MATCH ("foo < char * > ( int ) const",
4922 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4923 CHECK_MATCH ("foo < char * > ( int ) &&",
4924 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4927 /* Test lookup names that don't match anything. */
4929 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4932 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4936 /* Some wild matching tests, exercising "(anonymous namespace)",
4937 which should not be confused with a parameter list. */
4939 static const char *syms
[] = {
4943 "A :: B :: C ( int )",
4948 for (const char *s
: syms
)
4950 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4951 EXPECT ("(anonymous namespace)::A::B::C"));
4956 static const char expected
[] = "ns2::tmpl<int>::foo2";
4957 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4959 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4963 SELF_CHECK (!any_mismatch
);
4972 test_mapped_index_find_name_component_bounds ();
4973 test_dw2_expand_symtabs_matching_symbol ();
4976 }} // namespace selftests::dw2_expand_symtabs_matching
4978 #endif /* GDB_SELF_TEST */
4980 /* If FILE_MATCHER is NULL or if PER_CU has
4981 dwarf2_per_cu_quick_data::MARK set (see
4982 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4983 EXPANSION_NOTIFY on it. */
4986 dw2_expand_symtabs_matching_one
4987 (struct dwarf2_per_cu_data
*per_cu
,
4988 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4989 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4991 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4993 bool symtab_was_null
4994 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4996 dw2_instantiate_symtab (per_cu
, false);
4998 if (expansion_notify
!= NULL
5000 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5001 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5005 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5006 matched, to expand corresponding CUs that were marked. IDX is the
5007 index of the symbol name that matched. */
5010 dw2_expand_marked_cus
5011 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5012 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5013 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5016 offset_type
*vec
, vec_len
, vec_idx
;
5017 bool global_seen
= false;
5018 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5020 vec
= (offset_type
*) (index
.constant_pool
5021 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5022 vec_len
= MAYBE_SWAP (vec
[0]);
5023 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5025 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5026 /* This value is only valid for index versions >= 7. */
5027 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5028 gdb_index_symbol_kind symbol_kind
=
5029 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5030 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5031 /* Only check the symbol attributes if they're present.
5032 Indices prior to version 7 don't record them,
5033 and indices >= 7 may elide them for certain symbols
5034 (gold does this). */
5037 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5039 /* Work around gold/15646. */
5042 if (!is_static
&& global_seen
)
5048 /* Only check the symbol's kind if it has one. */
5053 case VARIABLES_DOMAIN
:
5054 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5057 case FUNCTIONS_DOMAIN
:
5058 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5062 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5070 /* Don't crash on bad data. */
5071 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
5072 + dwarf2_per_objfile
->all_type_units
.size ()))
5074 complaint (_(".gdb_index entry has bad CU index"
5076 objfile_name (dwarf2_per_objfile
->objfile
));
5080 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
5081 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5086 /* If FILE_MATCHER is non-NULL, set all the
5087 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5088 that match FILE_MATCHER. */
5091 dw_expand_symtabs_matching_file_matcher
5092 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5093 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5095 if (file_matcher
== NULL
)
5098 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5100 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5102 NULL
, xcalloc
, xfree
));
5103 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5105 NULL
, xcalloc
, xfree
));
5107 /* The rule is CUs specify all the files, including those used by
5108 any TU, so there's no need to scan TUs here. */
5110 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5114 per_cu
->v
.quick
->mark
= 0;
5116 /* We only need to look at symtabs not already expanded. */
5117 if (per_cu
->v
.quick
->compunit_symtab
)
5120 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5121 if (file_data
== NULL
)
5124 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5126 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5128 per_cu
->v
.quick
->mark
= 1;
5132 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5134 const char *this_real_name
;
5136 if (file_matcher (file_data
->file_names
[j
], false))
5138 per_cu
->v
.quick
->mark
= 1;
5142 /* Before we invoke realpath, which can get expensive when many
5143 files are involved, do a quick comparison of the basenames. */
5144 if (!basenames_may_differ
5145 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5149 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5150 if (file_matcher (this_real_name
, false))
5152 per_cu
->v
.quick
->mark
= 1;
5157 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
5158 ? visited_found
.get ()
5159 : visited_not_found
.get (),
5166 dw2_expand_symtabs_matching
5167 (struct objfile
*objfile
,
5168 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5169 const lookup_name_info
&lookup_name
,
5170 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5171 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5172 enum search_domain kind
)
5174 struct dwarf2_per_objfile
*dwarf2_per_objfile
5175 = get_dwarf2_per_objfile (objfile
);
5177 /* index_table is NULL if OBJF_READNOW. */
5178 if (!dwarf2_per_objfile
->index_table
)
5181 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5183 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5185 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5187 kind
, [&] (offset_type idx
)
5189 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5190 expansion_notify
, kind
);
5194 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5197 static struct compunit_symtab
*
5198 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5203 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5204 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5207 if (cust
->includes
== NULL
)
5210 for (i
= 0; cust
->includes
[i
]; ++i
)
5212 struct compunit_symtab
*s
= cust
->includes
[i
];
5214 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5222 static struct compunit_symtab
*
5223 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5224 struct bound_minimal_symbol msymbol
,
5226 struct obj_section
*section
,
5229 struct dwarf2_per_cu_data
*data
;
5230 struct compunit_symtab
*result
;
5232 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
5235 CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
5236 SECT_OFF_TEXT (objfile
));
5237 data
= (struct dwarf2_per_cu_data
*) addrmap_find
5238 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
5242 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5243 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5244 paddress (get_objfile_arch (objfile
), pc
));
5247 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
5250 gdb_assert (result
!= NULL
);
5255 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5256 void *data
, int need_fullname
)
5258 struct dwarf2_per_objfile
*dwarf2_per_objfile
5259 = get_dwarf2_per_objfile (objfile
);
5261 if (!dwarf2_per_objfile
->filenames_cache
)
5263 dwarf2_per_objfile
->filenames_cache
.emplace ();
5265 htab_up
visited (htab_create_alloc (10,
5266 htab_hash_pointer
, htab_eq_pointer
,
5267 NULL
, xcalloc
, xfree
));
5269 /* The rule is CUs specify all the files, including those used
5270 by any TU, so there's no need to scan TUs here. We can
5271 ignore file names coming from already-expanded CUs. */
5273 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5275 if (per_cu
->v
.quick
->compunit_symtab
)
5277 void **slot
= htab_find_slot (visited
.get (),
5278 per_cu
->v
.quick
->file_names
,
5281 *slot
= per_cu
->v
.quick
->file_names
;
5285 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5287 /* We only need to look at symtabs not already expanded. */
5288 if (per_cu
->v
.quick
->compunit_symtab
)
5291 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5292 if (file_data
== NULL
)
5295 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5298 /* Already visited. */
5303 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5305 const char *filename
= file_data
->file_names
[j
];
5306 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5311 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5313 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5316 this_real_name
= gdb_realpath (filename
);
5317 (*fun
) (filename
, this_real_name
.get (), data
);
5322 dw2_has_symbols (struct objfile
*objfile
)
5327 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5330 dw2_find_last_source_symtab
,
5331 dw2_forget_cached_source_info
,
5332 dw2_map_symtabs_matching_filename
,
5336 dw2_expand_symtabs_for_function
,
5337 dw2_expand_all_symtabs
,
5338 dw2_expand_symtabs_with_fullname
,
5339 dw2_map_matching_symbols
,
5340 dw2_expand_symtabs_matching
,
5341 dw2_find_pc_sect_compunit_symtab
,
5343 dw2_map_symbol_filenames
5346 /* DWARF-5 debug_names reader. */
5348 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5349 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5351 /* A helper function that reads the .debug_names section in SECTION
5352 and fills in MAP. FILENAME is the name of the file containing the
5353 section; it is used for error reporting.
5355 Returns true if all went well, false otherwise. */
5358 read_debug_names_from_section (struct objfile
*objfile
,
5359 const char *filename
,
5360 struct dwarf2_section_info
*section
,
5361 mapped_debug_names
&map
)
5363 if (dwarf2_section_empty_p (section
))
5366 /* Older elfutils strip versions could keep the section in the main
5367 executable while splitting it for the separate debug info file. */
5368 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5371 dwarf2_read_section (objfile
, section
);
5373 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5375 const gdb_byte
*addr
= section
->buffer
;
5377 bfd
*const abfd
= get_section_bfd_owner (section
);
5379 unsigned int bytes_read
;
5380 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5383 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5384 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5385 if (bytes_read
+ length
!= section
->size
)
5387 /* There may be multiple per-CU indices. */
5388 warning (_("Section .debug_names in %s length %s does not match "
5389 "section length %s, ignoring .debug_names."),
5390 filename
, plongest (bytes_read
+ length
),
5391 pulongest (section
->size
));
5395 /* The version number. */
5396 uint16_t version
= read_2_bytes (abfd
, addr
);
5400 warning (_("Section .debug_names in %s has unsupported version %d, "
5401 "ignoring .debug_names."),
5407 uint16_t padding
= read_2_bytes (abfd
, addr
);
5411 warning (_("Section .debug_names in %s has unsupported padding %d, "
5412 "ignoring .debug_names."),
5417 /* comp_unit_count - The number of CUs in the CU list. */
5418 map
.cu_count
= read_4_bytes (abfd
, addr
);
5421 /* local_type_unit_count - The number of TUs in the local TU
5423 map
.tu_count
= read_4_bytes (abfd
, addr
);
5426 /* foreign_type_unit_count - The number of TUs in the foreign TU
5428 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5430 if (foreign_tu_count
!= 0)
5432 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5433 "ignoring .debug_names."),
5434 filename
, static_cast<unsigned long> (foreign_tu_count
));
5438 /* bucket_count - The number of hash buckets in the hash lookup
5440 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5443 /* name_count - The number of unique names in the index. */
5444 map
.name_count
= read_4_bytes (abfd
, addr
);
5447 /* abbrev_table_size - The size in bytes of the abbreviations
5449 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5452 /* augmentation_string_size - The size in bytes of the augmentation
5453 string. This value is rounded up to a multiple of 4. */
5454 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5456 map
.augmentation_is_gdb
= ((augmentation_string_size
5457 == sizeof (dwarf5_augmentation
))
5458 && memcmp (addr
, dwarf5_augmentation
,
5459 sizeof (dwarf5_augmentation
)) == 0);
5460 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5461 addr
+= augmentation_string_size
;
5464 map
.cu_table_reordered
= addr
;
5465 addr
+= map
.cu_count
* map
.offset_size
;
5467 /* List of Local TUs */
5468 map
.tu_table_reordered
= addr
;
5469 addr
+= map
.tu_count
* map
.offset_size
;
5471 /* Hash Lookup Table */
5472 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5473 addr
+= map
.bucket_count
* 4;
5474 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5475 addr
+= map
.name_count
* 4;
5478 map
.name_table_string_offs_reordered
= addr
;
5479 addr
+= map
.name_count
* map
.offset_size
;
5480 map
.name_table_entry_offs_reordered
= addr
;
5481 addr
+= map
.name_count
* map
.offset_size
;
5483 const gdb_byte
*abbrev_table_start
= addr
;
5486 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5491 const auto insertpair
5492 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5493 if (!insertpair
.second
)
5495 warning (_("Section .debug_names in %s has duplicate index %s, "
5496 "ignoring .debug_names."),
5497 filename
, pulongest (index_num
));
5500 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5501 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5506 mapped_debug_names::index_val::attr attr
;
5507 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5509 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5511 if (attr
.form
== DW_FORM_implicit_const
)
5513 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5517 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5519 indexval
.attr_vec
.push_back (std::move (attr
));
5522 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5524 warning (_("Section .debug_names in %s has abbreviation_table "
5525 "of size %s vs. written as %u, ignoring .debug_names."),
5526 filename
, plongest (addr
- abbrev_table_start
),
5530 map
.entry_pool
= addr
;
5535 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5539 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5540 const mapped_debug_names
&map
,
5541 dwarf2_section_info
§ion
,
5544 sect_offset sect_off_prev
;
5545 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5547 sect_offset sect_off_next
;
5548 if (i
< map
.cu_count
)
5551 = (sect_offset
) (extract_unsigned_integer
5552 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5554 map
.dwarf5_byte_order
));
5557 sect_off_next
= (sect_offset
) section
.size
;
5560 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5561 dwarf2_per_cu_data
*per_cu
5562 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5563 sect_off_prev
, length
);
5564 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5566 sect_off_prev
= sect_off_next
;
5570 /* Read the CU list from the mapped index, and use it to create all
5571 the CU objects for this dwarf2_per_objfile. */
5574 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5575 const mapped_debug_names
&map
,
5576 const mapped_debug_names
&dwz_map
)
5578 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5579 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5581 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5582 dwarf2_per_objfile
->info
,
5583 false /* is_dwz */);
5585 if (dwz_map
.cu_count
== 0)
5588 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5589 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5593 /* Read .debug_names. If everything went ok, initialize the "quick"
5594 elements of all the CUs and return true. Otherwise, return false. */
5597 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5599 std::unique_ptr
<mapped_debug_names
> map
5600 (new mapped_debug_names (dwarf2_per_objfile
));
5601 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5602 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5604 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5605 &dwarf2_per_objfile
->debug_names
,
5609 /* Don't use the index if it's empty. */
5610 if (map
->name_count
== 0)
5613 /* If there is a .dwz file, read it so we can get its CU list as
5615 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5618 if (!read_debug_names_from_section (objfile
,
5619 bfd_get_filename (dwz
->dwz_bfd
),
5620 &dwz
->debug_names
, dwz_map
))
5622 warning (_("could not read '.debug_names' section from %s; skipping"),
5623 bfd_get_filename (dwz
->dwz_bfd
));
5628 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5630 if (map
->tu_count
!= 0)
5632 /* We can only handle a single .debug_types when we have an
5634 if (dwarf2_per_objfile
->types
.size () != 1)
5637 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
5639 create_signatured_type_table_from_debug_names
5640 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5643 create_addrmap_from_aranges (dwarf2_per_objfile
,
5644 &dwarf2_per_objfile
->debug_aranges
);
5646 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5647 dwarf2_per_objfile
->using_index
= 1;
5648 dwarf2_per_objfile
->quick_file_names_table
=
5649 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5654 /* Type used to manage iterating over all CUs looking for a symbol for
5657 class dw2_debug_names_iterator
5660 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5661 gdb::optional
<block_enum
> block_index
,
5664 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5665 m_addr (find_vec_in_debug_names (map
, name
))
5668 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5669 search_domain search
, uint32_t namei
)
5672 m_addr (find_vec_in_debug_names (map
, namei
))
5675 /* Return the next matching CU or NULL if there are no more. */
5676 dwarf2_per_cu_data
*next ();
5679 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5681 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5684 /* The internalized form of .debug_names. */
5685 const mapped_debug_names
&m_map
;
5687 /* If set, only look for symbols that match that block. Valid values are
5688 GLOBAL_BLOCK and STATIC_BLOCK. */
5689 const gdb::optional
<block_enum
> m_block_index
;
5691 /* The kind of symbol we're looking for. */
5692 const domain_enum m_domain
= UNDEF_DOMAIN
;
5693 const search_domain m_search
= ALL_DOMAIN
;
5695 /* The list of CUs from the index entry of the symbol, or NULL if
5697 const gdb_byte
*m_addr
;
5701 mapped_debug_names::namei_to_name (uint32_t namei
) const
5703 const ULONGEST namei_string_offs
5704 = extract_unsigned_integer ((name_table_string_offs_reordered
5705 + namei
* offset_size
),
5708 return read_indirect_string_at_offset
5709 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5712 /* Find a slot in .debug_names for the object named NAME. If NAME is
5713 found, return pointer to its pool data. If NAME cannot be found,
5717 dw2_debug_names_iterator::find_vec_in_debug_names
5718 (const mapped_debug_names
&map
, const char *name
)
5720 int (*cmp
) (const char *, const char *);
5722 gdb::unique_xmalloc_ptr
<char> without_params
;
5723 if (current_language
->la_language
== language_cplus
5724 || current_language
->la_language
== language_fortran
5725 || current_language
->la_language
== language_d
)
5727 /* NAME is already canonical. Drop any qualifiers as
5728 .debug_names does not contain any. */
5730 if (strchr (name
, '(') != NULL
)
5732 without_params
= cp_remove_params (name
);
5733 if (without_params
!= NULL
)
5734 name
= without_params
.get ();
5738 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5740 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5742 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5743 (map
.bucket_table_reordered
5744 + (full_hash
% map
.bucket_count
)), 4,
5745 map
.dwarf5_byte_order
);
5749 if (namei
>= map
.name_count
)
5751 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5753 namei
, map
.name_count
,
5754 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5760 const uint32_t namei_full_hash
5761 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5762 (map
.hash_table_reordered
+ namei
), 4,
5763 map
.dwarf5_byte_order
);
5764 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5767 if (full_hash
== namei_full_hash
)
5769 const char *const namei_string
= map
.namei_to_name (namei
);
5771 #if 0 /* An expensive sanity check. */
5772 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5774 complaint (_("Wrong .debug_names hash for string at index %u "
5776 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5781 if (cmp (namei_string
, name
) == 0)
5783 const ULONGEST namei_entry_offs
5784 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5785 + namei
* map
.offset_size
),
5786 map
.offset_size
, map
.dwarf5_byte_order
);
5787 return map
.entry_pool
+ namei_entry_offs
;
5792 if (namei
>= map
.name_count
)
5798 dw2_debug_names_iterator::find_vec_in_debug_names
5799 (const mapped_debug_names
&map
, uint32_t namei
)
5801 if (namei
>= map
.name_count
)
5803 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5805 namei
, map
.name_count
,
5806 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5810 const ULONGEST namei_entry_offs
5811 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5812 + namei
* map
.offset_size
),
5813 map
.offset_size
, map
.dwarf5_byte_order
);
5814 return map
.entry_pool
+ namei_entry_offs
;
5817 /* See dw2_debug_names_iterator. */
5819 dwarf2_per_cu_data
*
5820 dw2_debug_names_iterator::next ()
5825 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5826 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5827 bfd
*const abfd
= objfile
->obfd
;
5831 unsigned int bytes_read
;
5832 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5833 m_addr
+= bytes_read
;
5837 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5838 if (indexval_it
== m_map
.abbrev_map
.cend ())
5840 complaint (_("Wrong .debug_names undefined abbrev code %s "
5842 pulongest (abbrev
), objfile_name (objfile
));
5845 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5846 enum class symbol_linkage
{
5850 } symbol_linkage
= symbol_linkage::unknown
;
5851 dwarf2_per_cu_data
*per_cu
= NULL
;
5852 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5857 case DW_FORM_implicit_const
:
5858 ull
= attr
.implicit_const
;
5860 case DW_FORM_flag_present
:
5864 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5865 m_addr
+= bytes_read
;
5868 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5869 dwarf_form_name (attr
.form
),
5870 objfile_name (objfile
));
5873 switch (attr
.dw_idx
)
5875 case DW_IDX_compile_unit
:
5876 /* Don't crash on bad data. */
5877 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5879 complaint (_(".debug_names entry has bad CU index %s"
5882 objfile_name (dwarf2_per_objfile
->objfile
));
5885 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5887 case DW_IDX_type_unit
:
5888 /* Don't crash on bad data. */
5889 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5891 complaint (_(".debug_names entry has bad TU index %s"
5894 objfile_name (dwarf2_per_objfile
->objfile
));
5897 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5899 case DW_IDX_GNU_internal
:
5900 if (!m_map
.augmentation_is_gdb
)
5902 symbol_linkage
= symbol_linkage::static_
;
5904 case DW_IDX_GNU_external
:
5905 if (!m_map
.augmentation_is_gdb
)
5907 symbol_linkage
= symbol_linkage::extern_
;
5912 /* Skip if already read in. */
5913 if (per_cu
->v
.quick
->compunit_symtab
)
5916 /* Check static vs global. */
5917 if (symbol_linkage
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5919 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5920 const bool symbol_is_static
= symbol_linkage
== symbol_linkage::static_
;
5921 if (want_static
!= symbol_is_static
)
5925 /* Match dw2_symtab_iter_next, symbol_kind
5926 and debug_names::psymbol_tag. */
5930 switch (indexval
.dwarf_tag
)
5932 case DW_TAG_variable
:
5933 case DW_TAG_subprogram
:
5934 /* Some types are also in VAR_DOMAIN. */
5935 case DW_TAG_typedef
:
5936 case DW_TAG_structure_type
:
5943 switch (indexval
.dwarf_tag
)
5945 case DW_TAG_typedef
:
5946 case DW_TAG_structure_type
:
5953 switch (indexval
.dwarf_tag
)
5956 case DW_TAG_variable
:
5966 /* Match dw2_expand_symtabs_matching, symbol_kind and
5967 debug_names::psymbol_tag. */
5970 case VARIABLES_DOMAIN
:
5971 switch (indexval
.dwarf_tag
)
5973 case DW_TAG_variable
:
5979 case FUNCTIONS_DOMAIN
:
5980 switch (indexval
.dwarf_tag
)
5982 case DW_TAG_subprogram
:
5989 switch (indexval
.dwarf_tag
)
5991 case DW_TAG_typedef
:
5992 case DW_TAG_structure_type
:
6005 static struct compunit_symtab
*
6006 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, int block_index_int
,
6007 const char *name
, domain_enum domain
)
6009 const block_enum block_index
= static_cast<block_enum
> (block_index_int
);
6010 struct dwarf2_per_objfile
*dwarf2_per_objfile
6011 = get_dwarf2_per_objfile (objfile
);
6013 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6016 /* index is NULL if OBJF_READNOW. */
6019 const auto &map
= *mapp
;
6021 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
6023 struct compunit_symtab
*stab_best
= NULL
;
6024 struct dwarf2_per_cu_data
*per_cu
;
6025 while ((per_cu
= iter
.next ()) != NULL
)
6027 struct symbol
*sym
, *with_opaque
= NULL
;
6028 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
6029 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6030 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6032 sym
= block_find_symbol (block
, name
, domain
,
6033 block_find_non_opaque_type_preferred
,
6036 /* Some caution must be observed with overloaded functions and
6037 methods, since the index will not contain any overload
6038 information (but NAME might contain it). */
6041 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6043 if (with_opaque
!= NULL
6044 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6047 /* Keep looking through other CUs. */
6053 /* This dumps minimal information about .debug_names. It is called
6054 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6055 uses this to verify that .debug_names has been loaded. */
6058 dw2_debug_names_dump (struct objfile
*objfile
)
6060 struct dwarf2_per_objfile
*dwarf2_per_objfile
6061 = get_dwarf2_per_objfile (objfile
);
6063 gdb_assert (dwarf2_per_objfile
->using_index
);
6064 printf_filtered (".debug_names:");
6065 if (dwarf2_per_objfile
->debug_names_table
)
6066 printf_filtered (" exists\n");
6068 printf_filtered (" faked for \"readnow\"\n");
6069 printf_filtered ("\n");
6073 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6074 const char *func_name
)
6076 struct dwarf2_per_objfile
*dwarf2_per_objfile
6077 = get_dwarf2_per_objfile (objfile
);
6079 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6080 if (dwarf2_per_objfile
->debug_names_table
)
6082 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6084 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
6086 struct dwarf2_per_cu_data
*per_cu
;
6087 while ((per_cu
= iter
.next ()) != NULL
)
6088 dw2_instantiate_symtab (per_cu
, false);
6093 dw2_debug_names_expand_symtabs_matching
6094 (struct objfile
*objfile
,
6095 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6096 const lookup_name_info
&lookup_name
,
6097 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6098 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6099 enum search_domain kind
)
6101 struct dwarf2_per_objfile
*dwarf2_per_objfile
6102 = get_dwarf2_per_objfile (objfile
);
6104 /* debug_names_table is NULL if OBJF_READNOW. */
6105 if (!dwarf2_per_objfile
->debug_names_table
)
6108 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6110 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6112 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6114 kind
, [&] (offset_type namei
)
6116 /* The name was matched, now expand corresponding CUs that were
6118 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6120 struct dwarf2_per_cu_data
*per_cu
;
6121 while ((per_cu
= iter
.next ()) != NULL
)
6122 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6127 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6130 dw2_find_last_source_symtab
,
6131 dw2_forget_cached_source_info
,
6132 dw2_map_symtabs_matching_filename
,
6133 dw2_debug_names_lookup_symbol
,
6135 dw2_debug_names_dump
,
6136 dw2_debug_names_expand_symtabs_for_function
,
6137 dw2_expand_all_symtabs
,
6138 dw2_expand_symtabs_with_fullname
,
6139 dw2_map_matching_symbols
,
6140 dw2_debug_names_expand_symtabs_matching
,
6141 dw2_find_pc_sect_compunit_symtab
,
6143 dw2_map_symbol_filenames
6146 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
6147 to either a dwarf2_per_objfile or dwz_file object. */
6149 template <typename T
>
6150 static gdb::array_view
<const gdb_byte
>
6151 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
6153 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
6155 if (dwarf2_section_empty_p (section
))
6158 /* Older elfutils strip versions could keep the section in the main
6159 executable while splitting it for the separate debug info file. */
6160 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
6163 dwarf2_read_section (obj
, section
);
6165 /* dwarf2_section_info::size is a bfd_size_type, while
6166 gdb::array_view works with size_t. On 32-bit hosts, with
6167 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
6168 is 32-bit. So we need an explicit narrowing conversion here.
6169 This is fine, because it's impossible to allocate or mmap an
6170 array/buffer larger than what size_t can represent. */
6171 return gdb::make_array_view (section
->buffer
, section
->size
);
6174 /* Lookup the index cache for the contents of the index associated to
6177 static gdb::array_view
<const gdb_byte
>
6178 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
6180 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
6181 if (build_id
== nullptr)
6184 return global_index_cache
.lookup_gdb_index (build_id
,
6185 &dwarf2_obj
->index_cache_res
);
6188 /* Same as the above, but for DWZ. */
6190 static gdb::array_view
<const gdb_byte
>
6191 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
6193 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
6194 if (build_id
== nullptr)
6197 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
6200 /* See symfile.h. */
6203 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6205 struct dwarf2_per_objfile
*dwarf2_per_objfile
6206 = get_dwarf2_per_objfile (objfile
);
6208 /* If we're about to read full symbols, don't bother with the
6209 indices. In this case we also don't care if some other debug
6210 format is making psymtabs, because they are all about to be
6212 if ((objfile
->flags
& OBJF_READNOW
))
6214 dwarf2_per_objfile
->using_index
= 1;
6215 create_all_comp_units (dwarf2_per_objfile
);
6216 create_all_type_units (dwarf2_per_objfile
);
6217 dwarf2_per_objfile
->quick_file_names_table
6218 = create_quick_file_names_table
6219 (dwarf2_per_objfile
->all_comp_units
.size ());
6221 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
6222 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
6224 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6226 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6227 struct dwarf2_per_cu_quick_data
);
6230 /* Return 1 so that gdb sees the "quick" functions. However,
6231 these functions will be no-ops because we will have expanded
6233 *index_kind
= dw_index_kind::GDB_INDEX
;
6237 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6239 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6243 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6244 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
6245 get_gdb_index_contents_from_section
<dwz_file
>))
6247 *index_kind
= dw_index_kind::GDB_INDEX
;
6251 /* ... otherwise, try to find the index in the index cache. */
6252 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6253 get_gdb_index_contents_from_cache
,
6254 get_gdb_index_contents_from_cache_dwz
))
6256 global_index_cache
.hit ();
6257 *index_kind
= dw_index_kind::GDB_INDEX
;
6261 global_index_cache
.miss ();
6267 /* Build a partial symbol table. */
6270 dwarf2_build_psymtabs (struct objfile
*objfile
)
6272 struct dwarf2_per_objfile
*dwarf2_per_objfile
6273 = get_dwarf2_per_objfile (objfile
);
6275 init_psymbol_list (objfile
, 1024);
6279 /* This isn't really ideal: all the data we allocate on the
6280 objfile's obstack is still uselessly kept around. However,
6281 freeing it seems unsafe. */
6282 psymtab_discarder
psymtabs (objfile
);
6283 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6286 /* (maybe) store an index in the cache. */
6287 global_index_cache
.store (dwarf2_per_objfile
);
6289 catch (const gdb_exception_error
&except
)
6291 exception_print (gdb_stderr
, except
);
6295 /* Return the total length of the CU described by HEADER. */
6298 get_cu_length (const struct comp_unit_head
*header
)
6300 return header
->initial_length_size
+ header
->length
;
6303 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6306 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6308 sect_offset bottom
= cu_header
->sect_off
;
6309 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6311 return sect_off
>= bottom
&& sect_off
< top
;
6314 /* Find the base address of the compilation unit for range lists and
6315 location lists. It will normally be specified by DW_AT_low_pc.
6316 In DWARF-3 draft 4, the base address could be overridden by
6317 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6318 compilation units with discontinuous ranges. */
6321 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6323 struct attribute
*attr
;
6326 cu
->base_address
= 0;
6328 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6331 cu
->base_address
= attr_value_as_address (attr
);
6336 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6339 cu
->base_address
= attr_value_as_address (attr
);
6345 /* Read in the comp unit header information from the debug_info at info_ptr.
6346 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6347 NOTE: This leaves members offset, first_die_offset to be filled in
6350 static const gdb_byte
*
6351 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6352 const gdb_byte
*info_ptr
,
6353 struct dwarf2_section_info
*section
,
6354 rcuh_kind section_kind
)
6357 unsigned int bytes_read
;
6358 const char *filename
= get_section_file_name (section
);
6359 bfd
*abfd
= get_section_bfd_owner (section
);
6361 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6362 cu_header
->initial_length_size
= bytes_read
;
6363 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6364 info_ptr
+= bytes_read
;
6365 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6366 if (cu_header
->version
< 2 || cu_header
->version
> 5)
6367 error (_("Dwarf Error: wrong version in compilation unit header "
6368 "(is %d, should be 2, 3, 4 or 5) [in module %s]"),
6369 cu_header
->version
, filename
);
6371 if (cu_header
->version
< 5)
6372 switch (section_kind
)
6374 case rcuh_kind::COMPILE
:
6375 cu_header
->unit_type
= DW_UT_compile
;
6377 case rcuh_kind::TYPE
:
6378 cu_header
->unit_type
= DW_UT_type
;
6381 internal_error (__FILE__
, __LINE__
,
6382 _("read_comp_unit_head: invalid section_kind"));
6386 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6387 (read_1_byte (abfd
, info_ptr
));
6389 switch (cu_header
->unit_type
)
6392 if (section_kind
!= rcuh_kind::COMPILE
)
6393 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6394 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
6398 section_kind
= rcuh_kind::TYPE
;
6401 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6402 "(is %d, should be %d or %d) [in module %s]"),
6403 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
6406 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6409 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6412 info_ptr
+= bytes_read
;
6413 if (cu_header
->version
< 5)
6415 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6418 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6419 if (signed_addr
< 0)
6420 internal_error (__FILE__
, __LINE__
,
6421 _("read_comp_unit_head: dwarf from non elf file"));
6422 cu_header
->signed_addr_p
= signed_addr
;
6424 if (section_kind
== rcuh_kind::TYPE
)
6426 LONGEST type_offset
;
6428 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6431 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6432 info_ptr
+= bytes_read
;
6433 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6434 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6435 error (_("Dwarf Error: Too big type_offset in compilation unit "
6436 "header (is %s) [in module %s]"), plongest (type_offset
),
6443 /* Helper function that returns the proper abbrev section for
6446 static struct dwarf2_section_info
*
6447 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6449 struct dwarf2_section_info
*abbrev
;
6450 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6452 if (this_cu
->is_dwz
)
6453 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6455 abbrev
= &dwarf2_per_objfile
->abbrev
;
6460 /* Subroutine of read_and_check_comp_unit_head and
6461 read_and_check_type_unit_head to simplify them.
6462 Perform various error checking on the header. */
6465 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6466 struct comp_unit_head
*header
,
6467 struct dwarf2_section_info
*section
,
6468 struct dwarf2_section_info
*abbrev_section
)
6470 const char *filename
= get_section_file_name (section
);
6472 if (to_underlying (header
->abbrev_sect_off
)
6473 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6474 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6475 "(offset %s + 6) [in module %s]"),
6476 sect_offset_str (header
->abbrev_sect_off
),
6477 sect_offset_str (header
->sect_off
),
6480 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6481 avoid potential 32-bit overflow. */
6482 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6484 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6485 "(offset %s + 0) [in module %s]"),
6486 header
->length
, sect_offset_str (header
->sect_off
),
6490 /* Read in a CU/TU header and perform some basic error checking.
6491 The contents of the header are stored in HEADER.
6492 The result is a pointer to the start of the first DIE. */
6494 static const gdb_byte
*
6495 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6496 struct comp_unit_head
*header
,
6497 struct dwarf2_section_info
*section
,
6498 struct dwarf2_section_info
*abbrev_section
,
6499 const gdb_byte
*info_ptr
,
6500 rcuh_kind section_kind
)
6502 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6504 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6506 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6508 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6510 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6516 /* Fetch the abbreviation table offset from a comp or type unit header. */
6519 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6520 struct dwarf2_section_info
*section
,
6521 sect_offset sect_off
)
6523 bfd
*abfd
= get_section_bfd_owner (section
);
6524 const gdb_byte
*info_ptr
;
6525 unsigned int initial_length_size
, offset_size
;
6528 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6529 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6530 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6531 offset_size
= initial_length_size
== 4 ? 4 : 8;
6532 info_ptr
+= initial_length_size
;
6534 version
= read_2_bytes (abfd
, info_ptr
);
6538 /* Skip unit type and address size. */
6542 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6545 /* Allocate a new partial symtab for file named NAME and mark this new
6546 partial symtab as being an include of PST. */
6549 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6550 struct objfile
*objfile
)
6552 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6554 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6556 /* It shares objfile->objfile_obstack. */
6557 subpst
->dirname
= pst
->dirname
;
6560 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6561 subpst
->dependencies
[0] = pst
;
6562 subpst
->number_of_dependencies
= 1;
6564 subpst
->read_symtab
= pst
->read_symtab
;
6566 /* No private part is necessary for include psymtabs. This property
6567 can be used to differentiate between such include psymtabs and
6568 the regular ones. */
6569 subpst
->read_symtab_private
= NULL
;
6572 /* Read the Line Number Program data and extract the list of files
6573 included by the source file represented by PST. Build an include
6574 partial symtab for each of these included files. */
6577 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6578 struct die_info
*die
,
6579 struct partial_symtab
*pst
)
6582 struct attribute
*attr
;
6584 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6586 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6588 return; /* No linetable, so no includes. */
6590 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6591 that we pass in the raw text_low here; that is ok because we're
6592 only decoding the line table to make include partial symtabs, and
6593 so the addresses aren't really used. */
6594 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6595 pst
->raw_text_low (), 1);
6599 hash_signatured_type (const void *item
)
6601 const struct signatured_type
*sig_type
6602 = (const struct signatured_type
*) item
;
6604 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6605 return sig_type
->signature
;
6609 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6611 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6612 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6614 return lhs
->signature
== rhs
->signature
;
6617 /* Allocate a hash table for signatured types. */
6620 allocate_signatured_type_table (struct objfile
*objfile
)
6622 return htab_create_alloc_ex (41,
6623 hash_signatured_type
,
6626 &objfile
->objfile_obstack
,
6627 hashtab_obstack_allocate
,
6628 dummy_obstack_deallocate
);
6631 /* A helper function to add a signatured type CU to a table. */
6634 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6636 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6637 std::vector
<signatured_type
*> *all_type_units
6638 = (std::vector
<signatured_type
*> *) datum
;
6640 all_type_units
->push_back (sigt
);
6645 /* A helper for create_debug_types_hash_table. Read types from SECTION
6646 and fill them into TYPES_HTAB. It will process only type units,
6647 therefore DW_UT_type. */
6650 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6651 struct dwo_file
*dwo_file
,
6652 dwarf2_section_info
*section
, htab_t
&types_htab
,
6653 rcuh_kind section_kind
)
6655 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6656 struct dwarf2_section_info
*abbrev_section
;
6658 const gdb_byte
*info_ptr
, *end_ptr
;
6660 abbrev_section
= (dwo_file
!= NULL
6661 ? &dwo_file
->sections
.abbrev
6662 : &dwarf2_per_objfile
->abbrev
);
6664 if (dwarf_read_debug
)
6665 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6666 get_section_name (section
),
6667 get_section_file_name (abbrev_section
));
6669 dwarf2_read_section (objfile
, section
);
6670 info_ptr
= section
->buffer
;
6672 if (info_ptr
== NULL
)
6675 /* We can't set abfd until now because the section may be empty or
6676 not present, in which case the bfd is unknown. */
6677 abfd
= get_section_bfd_owner (section
);
6679 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6680 because we don't need to read any dies: the signature is in the
6683 end_ptr
= info_ptr
+ section
->size
;
6684 while (info_ptr
< end_ptr
)
6686 struct signatured_type
*sig_type
;
6687 struct dwo_unit
*dwo_tu
;
6689 const gdb_byte
*ptr
= info_ptr
;
6690 struct comp_unit_head header
;
6691 unsigned int length
;
6693 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6695 /* Initialize it due to a false compiler warning. */
6696 header
.signature
= -1;
6697 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6699 /* We need to read the type's signature in order to build the hash
6700 table, but we don't need anything else just yet. */
6702 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6703 abbrev_section
, ptr
, section_kind
);
6705 length
= get_cu_length (&header
);
6707 /* Skip dummy type units. */
6708 if (ptr
>= info_ptr
+ length
6709 || peek_abbrev_code (abfd
, ptr
) == 0
6710 || header
.unit_type
!= DW_UT_type
)
6716 if (types_htab
== NULL
)
6719 types_htab
= allocate_dwo_unit_table (objfile
);
6721 types_htab
= allocate_signatured_type_table (objfile
);
6727 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6729 dwo_tu
->dwo_file
= dwo_file
;
6730 dwo_tu
->signature
= header
.signature
;
6731 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6732 dwo_tu
->section
= section
;
6733 dwo_tu
->sect_off
= sect_off
;
6734 dwo_tu
->length
= length
;
6738 /* N.B.: type_offset is not usable if this type uses a DWO file.
6739 The real type_offset is in the DWO file. */
6741 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6742 struct signatured_type
);
6743 sig_type
->signature
= header
.signature
;
6744 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6745 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6746 sig_type
->per_cu
.is_debug_types
= 1;
6747 sig_type
->per_cu
.section
= section
;
6748 sig_type
->per_cu
.sect_off
= sect_off
;
6749 sig_type
->per_cu
.length
= length
;
6752 slot
= htab_find_slot (types_htab
,
6753 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6755 gdb_assert (slot
!= NULL
);
6758 sect_offset dup_sect_off
;
6762 const struct dwo_unit
*dup_tu
6763 = (const struct dwo_unit
*) *slot
;
6765 dup_sect_off
= dup_tu
->sect_off
;
6769 const struct signatured_type
*dup_tu
6770 = (const struct signatured_type
*) *slot
;
6772 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6775 complaint (_("debug type entry at offset %s is duplicate to"
6776 " the entry at offset %s, signature %s"),
6777 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6778 hex_string (header
.signature
));
6780 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6782 if (dwarf_read_debug
> 1)
6783 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6784 sect_offset_str (sect_off
),
6785 hex_string (header
.signature
));
6791 /* Create the hash table of all entries in the .debug_types
6792 (or .debug_types.dwo) section(s).
6793 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6794 otherwise it is NULL.
6796 The result is a pointer to the hash table or NULL if there are no types.
6798 Note: This function processes DWO files only, not DWP files. */
6801 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6802 struct dwo_file
*dwo_file
,
6803 gdb::array_view
<dwarf2_section_info
> type_sections
,
6806 for (dwarf2_section_info
§ion
: type_sections
)
6807 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6808 types_htab
, rcuh_kind::TYPE
);
6811 /* Create the hash table of all entries in the .debug_types section,
6812 and initialize all_type_units.
6813 The result is zero if there is an error (e.g. missing .debug_types section),
6814 otherwise non-zero. */
6817 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6819 htab_t types_htab
= NULL
;
6821 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6822 &dwarf2_per_objfile
->info
, types_htab
,
6823 rcuh_kind::COMPILE
);
6824 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6825 dwarf2_per_objfile
->types
, types_htab
);
6826 if (types_htab
== NULL
)
6828 dwarf2_per_objfile
->signatured_types
= NULL
;
6832 dwarf2_per_objfile
->signatured_types
= types_htab
;
6834 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6835 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6837 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6838 &dwarf2_per_objfile
->all_type_units
);
6843 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6844 If SLOT is non-NULL, it is the entry to use in the hash table.
6845 Otherwise we find one. */
6847 static struct signatured_type
*
6848 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6851 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6853 if (dwarf2_per_objfile
->all_type_units
.size ()
6854 == dwarf2_per_objfile
->all_type_units
.capacity ())
6855 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6857 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6858 struct signatured_type
);
6860 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6861 sig_type
->signature
= sig
;
6862 sig_type
->per_cu
.is_debug_types
= 1;
6863 if (dwarf2_per_objfile
->using_index
)
6865 sig_type
->per_cu
.v
.quick
=
6866 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6867 struct dwarf2_per_cu_quick_data
);
6872 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6875 gdb_assert (*slot
== NULL
);
6877 /* The rest of sig_type must be filled in by the caller. */
6881 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6882 Fill in SIG_ENTRY with DWO_ENTRY. */
6885 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6886 struct signatured_type
*sig_entry
,
6887 struct dwo_unit
*dwo_entry
)
6889 /* Make sure we're not clobbering something we don't expect to. */
6890 gdb_assert (! sig_entry
->per_cu
.queued
);
6891 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6892 if (dwarf2_per_objfile
->using_index
)
6894 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6895 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6898 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6899 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6900 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6901 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6902 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6904 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6905 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6906 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6907 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6908 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6909 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6910 sig_entry
->dwo_unit
= dwo_entry
;
6913 /* Subroutine of lookup_signatured_type.
6914 If we haven't read the TU yet, create the signatured_type data structure
6915 for a TU to be read in directly from a DWO file, bypassing the stub.
6916 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6917 using .gdb_index, then when reading a CU we want to stay in the DWO file
6918 containing that CU. Otherwise we could end up reading several other DWO
6919 files (due to comdat folding) to process the transitive closure of all the
6920 mentioned TUs, and that can be slow. The current DWO file will have every
6921 type signature that it needs.
6922 We only do this for .gdb_index because in the psymtab case we already have
6923 to read all the DWOs to build the type unit groups. */
6925 static struct signatured_type
*
6926 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6928 struct dwarf2_per_objfile
*dwarf2_per_objfile
6929 = cu
->per_cu
->dwarf2_per_objfile
;
6930 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6931 struct dwo_file
*dwo_file
;
6932 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6933 struct signatured_type find_sig_entry
, *sig_entry
;
6936 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6938 /* If TU skeletons have been removed then we may not have read in any
6940 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6942 dwarf2_per_objfile
->signatured_types
6943 = allocate_signatured_type_table (objfile
);
6946 /* We only ever need to read in one copy of a signatured type.
6947 Use the global signatured_types array to do our own comdat-folding
6948 of types. If this is the first time we're reading this TU, and
6949 the TU has an entry in .gdb_index, replace the recorded data from
6950 .gdb_index with this TU. */
6952 find_sig_entry
.signature
= sig
;
6953 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6954 &find_sig_entry
, INSERT
);
6955 sig_entry
= (struct signatured_type
*) *slot
;
6957 /* We can get here with the TU already read, *or* in the process of being
6958 read. Don't reassign the global entry to point to this DWO if that's
6959 the case. Also note that if the TU is already being read, it may not
6960 have come from a DWO, the program may be a mix of Fission-compiled
6961 code and non-Fission-compiled code. */
6963 /* Have we already tried to read this TU?
6964 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6965 needn't exist in the global table yet). */
6966 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6969 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6970 dwo_unit of the TU itself. */
6971 dwo_file
= cu
->dwo_unit
->dwo_file
;
6973 /* Ok, this is the first time we're reading this TU. */
6974 if (dwo_file
->tus
== NULL
)
6976 find_dwo_entry
.signature
= sig
;
6977 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
6978 if (dwo_entry
== NULL
)
6981 /* If the global table doesn't have an entry for this TU, add one. */
6982 if (sig_entry
== NULL
)
6983 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6985 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6986 sig_entry
->per_cu
.tu_read
= 1;
6990 /* Subroutine of lookup_signatured_type.
6991 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6992 then try the DWP file. If the TU stub (skeleton) has been removed then
6993 it won't be in .gdb_index. */
6995 static struct signatured_type
*
6996 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6998 struct dwarf2_per_objfile
*dwarf2_per_objfile
6999 = cu
->per_cu
->dwarf2_per_objfile
;
7000 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7001 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
7002 struct dwo_unit
*dwo_entry
;
7003 struct signatured_type find_sig_entry
, *sig_entry
;
7006 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
7007 gdb_assert (dwp_file
!= NULL
);
7009 /* If TU skeletons have been removed then we may not have read in any
7011 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7013 dwarf2_per_objfile
->signatured_types
7014 = allocate_signatured_type_table (objfile
);
7017 find_sig_entry
.signature
= sig
;
7018 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7019 &find_sig_entry
, INSERT
);
7020 sig_entry
= (struct signatured_type
*) *slot
;
7022 /* Have we already tried to read this TU?
7023 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7024 needn't exist in the global table yet). */
7025 if (sig_entry
!= NULL
)
7028 if (dwp_file
->tus
== NULL
)
7030 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
7031 sig
, 1 /* is_debug_types */);
7032 if (dwo_entry
== NULL
)
7035 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7036 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7041 /* Lookup a signature based type for DW_FORM_ref_sig8.
7042 Returns NULL if signature SIG is not present in the table.
7043 It is up to the caller to complain about this. */
7045 static struct signatured_type
*
7046 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7048 struct dwarf2_per_objfile
*dwarf2_per_objfile
7049 = cu
->per_cu
->dwarf2_per_objfile
;
7052 && dwarf2_per_objfile
->using_index
)
7054 /* We're in a DWO/DWP file, and we're using .gdb_index.
7055 These cases require special processing. */
7056 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7057 return lookup_dwo_signatured_type (cu
, sig
);
7059 return lookup_dwp_signatured_type (cu
, sig
);
7063 struct signatured_type find_entry
, *entry
;
7065 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7067 find_entry
.signature
= sig
;
7068 entry
= ((struct signatured_type
*)
7069 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7074 /* Low level DIE reading support. */
7076 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7079 init_cu_die_reader (struct die_reader_specs
*reader
,
7080 struct dwarf2_cu
*cu
,
7081 struct dwarf2_section_info
*section
,
7082 struct dwo_file
*dwo_file
,
7083 struct abbrev_table
*abbrev_table
)
7085 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7086 reader
->abfd
= get_section_bfd_owner (section
);
7088 reader
->dwo_file
= dwo_file
;
7089 reader
->die_section
= section
;
7090 reader
->buffer
= section
->buffer
;
7091 reader
->buffer_end
= section
->buffer
+ section
->size
;
7092 reader
->comp_dir
= NULL
;
7093 reader
->abbrev_table
= abbrev_table
;
7096 /* Subroutine of init_cutu_and_read_dies to simplify it.
7097 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7098 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7101 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7102 from it to the DIE in the DWO. If NULL we are skipping the stub.
7103 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7104 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7105 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7106 STUB_COMP_DIR may be non-NULL.
7107 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7108 are filled in with the info of the DIE from the DWO file.
7109 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7110 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7111 kept around for at least as long as *RESULT_READER.
7113 The result is non-zero if a valid (non-dummy) DIE was found. */
7116 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7117 struct dwo_unit
*dwo_unit
,
7118 struct die_info
*stub_comp_unit_die
,
7119 const char *stub_comp_dir
,
7120 struct die_reader_specs
*result_reader
,
7121 const gdb_byte
**result_info_ptr
,
7122 struct die_info
**result_comp_unit_die
,
7123 int *result_has_children
,
7124 abbrev_table_up
*result_dwo_abbrev_table
)
7126 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7127 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7128 struct dwarf2_cu
*cu
= this_cu
->cu
;
7130 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7131 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7132 int i
,num_extra_attrs
;
7133 struct dwarf2_section_info
*dwo_abbrev_section
;
7134 struct attribute
*attr
;
7135 struct die_info
*comp_unit_die
;
7137 /* At most one of these may be provided. */
7138 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7140 /* These attributes aren't processed until later:
7141 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7142 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7143 referenced later. However, these attributes are found in the stub
7144 which we won't have later. In order to not impose this complication
7145 on the rest of the code, we read them here and copy them to the
7154 if (stub_comp_unit_die
!= NULL
)
7156 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7158 if (! this_cu
->is_debug_types
)
7159 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7160 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7161 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7162 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7163 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7165 /* There should be a DW_AT_addr_base attribute here (if needed).
7166 We need the value before we can process DW_FORM_GNU_addr_index
7167 or DW_FORM_addrx. */
7169 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7171 cu
->addr_base
= DW_UNSND (attr
);
7173 /* There should be a DW_AT_ranges_base attribute here (if needed).
7174 We need the value before we can process DW_AT_ranges. */
7175 cu
->ranges_base
= 0;
7176 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7178 cu
->ranges_base
= DW_UNSND (attr
);
7180 else if (stub_comp_dir
!= NULL
)
7182 /* Reconstruct the comp_dir attribute to simplify the code below. */
7183 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7184 comp_dir
->name
= DW_AT_comp_dir
;
7185 comp_dir
->form
= DW_FORM_string
;
7186 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7187 DW_STRING (comp_dir
) = stub_comp_dir
;
7190 /* Set up for reading the DWO CU/TU. */
7191 cu
->dwo_unit
= dwo_unit
;
7192 dwarf2_section_info
*section
= dwo_unit
->section
;
7193 dwarf2_read_section (objfile
, section
);
7194 abfd
= get_section_bfd_owner (section
);
7195 begin_info_ptr
= info_ptr
= (section
->buffer
7196 + to_underlying (dwo_unit
->sect_off
));
7197 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7199 if (this_cu
->is_debug_types
)
7201 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7203 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7204 &cu
->header
, section
,
7206 info_ptr
, rcuh_kind::TYPE
);
7207 /* This is not an assert because it can be caused by bad debug info. */
7208 if (sig_type
->signature
!= cu
->header
.signature
)
7210 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7211 " TU at offset %s [in module %s]"),
7212 hex_string (sig_type
->signature
),
7213 hex_string (cu
->header
.signature
),
7214 sect_offset_str (dwo_unit
->sect_off
),
7215 bfd_get_filename (abfd
));
7217 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7218 /* For DWOs coming from DWP files, we don't know the CU length
7219 nor the type's offset in the TU until now. */
7220 dwo_unit
->length
= get_cu_length (&cu
->header
);
7221 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7223 /* Establish the type offset that can be used to lookup the type.
7224 For DWO files, we don't know it until now. */
7225 sig_type
->type_offset_in_section
7226 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7230 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7231 &cu
->header
, section
,
7233 info_ptr
, rcuh_kind::COMPILE
);
7234 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7235 /* For DWOs coming from DWP files, we don't know the CU length
7237 dwo_unit
->length
= get_cu_length (&cu
->header
);
7240 *result_dwo_abbrev_table
7241 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7242 cu
->header
.abbrev_sect_off
);
7243 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7244 result_dwo_abbrev_table
->get ());
7246 /* Read in the die, but leave space to copy over the attributes
7247 from the stub. This has the benefit of simplifying the rest of
7248 the code - all the work to maintain the illusion of a single
7249 DW_TAG_{compile,type}_unit DIE is done here. */
7250 num_extra_attrs
= ((stmt_list
!= NULL
)
7254 + (comp_dir
!= NULL
));
7255 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7256 result_has_children
, num_extra_attrs
);
7258 /* Copy over the attributes from the stub to the DIE we just read in. */
7259 comp_unit_die
= *result_comp_unit_die
;
7260 i
= comp_unit_die
->num_attrs
;
7261 if (stmt_list
!= NULL
)
7262 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7264 comp_unit_die
->attrs
[i
++] = *low_pc
;
7265 if (high_pc
!= NULL
)
7266 comp_unit_die
->attrs
[i
++] = *high_pc
;
7268 comp_unit_die
->attrs
[i
++] = *ranges
;
7269 if (comp_dir
!= NULL
)
7270 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7271 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7273 if (dwarf_die_debug
)
7275 fprintf_unfiltered (gdb_stdlog
,
7276 "Read die from %s@0x%x of %s:\n",
7277 get_section_name (section
),
7278 (unsigned) (begin_info_ptr
- section
->buffer
),
7279 bfd_get_filename (abfd
));
7280 dump_die (comp_unit_die
, dwarf_die_debug
);
7283 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7284 TUs by skipping the stub and going directly to the entry in the DWO file.
7285 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7286 to get it via circuitous means. Blech. */
7287 if (comp_dir
!= NULL
)
7288 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7290 /* Skip dummy compilation units. */
7291 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7292 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7295 *result_info_ptr
= info_ptr
;
7299 /* Subroutine of init_cutu_and_read_dies to simplify it.
7300 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7301 Returns NULL if the specified DWO unit cannot be found. */
7303 static struct dwo_unit
*
7304 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7305 struct die_info
*comp_unit_die
)
7307 struct dwarf2_cu
*cu
= this_cu
->cu
;
7309 struct dwo_unit
*dwo_unit
;
7310 const char *comp_dir
, *dwo_name
;
7312 gdb_assert (cu
!= NULL
);
7314 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7315 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7316 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7318 if (this_cu
->is_debug_types
)
7320 struct signatured_type
*sig_type
;
7322 /* Since this_cu is the first member of struct signatured_type,
7323 we can go from a pointer to one to a pointer to the other. */
7324 sig_type
= (struct signatured_type
*) this_cu
;
7325 signature
= sig_type
->signature
;
7326 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7330 struct attribute
*attr
;
7332 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7334 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7336 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7337 signature
= DW_UNSND (attr
);
7338 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7345 /* Subroutine of init_cutu_and_read_dies to simplify it.
7346 See it for a description of the parameters.
7347 Read a TU directly from a DWO file, bypassing the stub. */
7350 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7351 int use_existing_cu
, int keep
,
7352 die_reader_func_ftype
*die_reader_func
,
7355 std::unique_ptr
<dwarf2_cu
> new_cu
;
7356 struct signatured_type
*sig_type
;
7357 struct die_reader_specs reader
;
7358 const gdb_byte
*info_ptr
;
7359 struct die_info
*comp_unit_die
;
7361 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7363 /* Verify we can do the following downcast, and that we have the
7365 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7366 sig_type
= (struct signatured_type
*) this_cu
;
7367 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7369 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7371 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7372 /* There's no need to do the rereading_dwo_cu handling that
7373 init_cutu_and_read_dies does since we don't read the stub. */
7377 /* If !use_existing_cu, this_cu->cu must be NULL. */
7378 gdb_assert (this_cu
->cu
== NULL
);
7379 new_cu
.reset (new dwarf2_cu (this_cu
));
7382 /* A future optimization, if needed, would be to use an existing
7383 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7384 could share abbrev tables. */
7386 /* The abbreviation table used by READER, this must live at least as long as
7388 abbrev_table_up dwo_abbrev_table
;
7390 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7391 NULL
/* stub_comp_unit_die */,
7392 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7394 &comp_unit_die
, &has_children
,
7395 &dwo_abbrev_table
) == 0)
7401 /* All the "real" work is done here. */
7402 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7404 /* This duplicates the code in init_cutu_and_read_dies,
7405 but the alternative is making the latter more complex.
7406 This function is only for the special case of using DWO files directly:
7407 no point in overly complicating the general case just to handle this. */
7408 if (new_cu
!= NULL
&& keep
)
7410 /* Link this CU into read_in_chain. */
7411 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7412 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7413 /* The chain owns it now. */
7418 /* Initialize a CU (or TU) and read its DIEs.
7419 If the CU defers to a DWO file, read the DWO file as well.
7421 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7422 Otherwise the table specified in the comp unit header is read in and used.
7423 This is an optimization for when we already have the abbrev table.
7425 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7426 Otherwise, a new CU is allocated with xmalloc.
7428 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7429 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7431 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7432 linker) then DIE_READER_FUNC will not get called. */
7435 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7436 struct abbrev_table
*abbrev_table
,
7437 int use_existing_cu
, int keep
,
7439 die_reader_func_ftype
*die_reader_func
,
7442 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7443 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7444 struct dwarf2_section_info
*section
= this_cu
->section
;
7445 bfd
*abfd
= get_section_bfd_owner (section
);
7446 struct dwarf2_cu
*cu
;
7447 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7448 struct die_reader_specs reader
;
7449 struct die_info
*comp_unit_die
;
7451 struct attribute
*attr
;
7452 struct signatured_type
*sig_type
= NULL
;
7453 struct dwarf2_section_info
*abbrev_section
;
7454 /* Non-zero if CU currently points to a DWO file and we need to
7455 reread it. When this happens we need to reread the skeleton die
7456 before we can reread the DWO file (this only applies to CUs, not TUs). */
7457 int rereading_dwo_cu
= 0;
7459 if (dwarf_die_debug
)
7460 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7461 this_cu
->is_debug_types
? "type" : "comp",
7462 sect_offset_str (this_cu
->sect_off
));
7464 if (use_existing_cu
)
7467 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7468 file (instead of going through the stub), short-circuit all of this. */
7469 if (this_cu
->reading_dwo_directly
)
7471 /* Narrow down the scope of possibilities to have to understand. */
7472 gdb_assert (this_cu
->is_debug_types
);
7473 gdb_assert (abbrev_table
== NULL
);
7474 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7475 die_reader_func
, data
);
7479 /* This is cheap if the section is already read in. */
7480 dwarf2_read_section (objfile
, section
);
7482 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7484 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7486 std::unique_ptr
<dwarf2_cu
> new_cu
;
7487 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7490 /* If this CU is from a DWO file we need to start over, we need to
7491 refetch the attributes from the skeleton CU.
7492 This could be optimized by retrieving those attributes from when we
7493 were here the first time: the previous comp_unit_die was stored in
7494 comp_unit_obstack. But there's no data yet that we need this
7496 if (cu
->dwo_unit
!= NULL
)
7497 rereading_dwo_cu
= 1;
7501 /* If !use_existing_cu, this_cu->cu must be NULL. */
7502 gdb_assert (this_cu
->cu
== NULL
);
7503 new_cu
.reset (new dwarf2_cu (this_cu
));
7507 /* Get the header. */
7508 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7510 /* We already have the header, there's no need to read it in again. */
7511 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7515 if (this_cu
->is_debug_types
)
7517 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7518 &cu
->header
, section
,
7519 abbrev_section
, info_ptr
,
7522 /* Since per_cu is the first member of struct signatured_type,
7523 we can go from a pointer to one to a pointer to the other. */
7524 sig_type
= (struct signatured_type
*) this_cu
;
7525 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7526 gdb_assert (sig_type
->type_offset_in_tu
7527 == cu
->header
.type_cu_offset_in_tu
);
7528 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7530 /* LENGTH has not been set yet for type units if we're
7531 using .gdb_index. */
7532 this_cu
->length
= get_cu_length (&cu
->header
);
7534 /* Establish the type offset that can be used to lookup the type. */
7535 sig_type
->type_offset_in_section
=
7536 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7538 this_cu
->dwarf_version
= cu
->header
.version
;
7542 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7543 &cu
->header
, section
,
7546 rcuh_kind::COMPILE
);
7548 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7549 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7550 this_cu
->dwarf_version
= cu
->header
.version
;
7554 /* Skip dummy compilation units. */
7555 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7556 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7559 /* If we don't have them yet, read the abbrevs for this compilation unit.
7560 And if we need to read them now, make sure they're freed when we're
7561 done (own the table through ABBREV_TABLE_HOLDER). */
7562 abbrev_table_up abbrev_table_holder
;
7563 if (abbrev_table
!= NULL
)
7564 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7568 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7569 cu
->header
.abbrev_sect_off
);
7570 abbrev_table
= abbrev_table_holder
.get ();
7573 /* Read the top level CU/TU die. */
7574 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7575 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7577 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7580 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7581 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7582 table from the DWO file and pass the ownership over to us. It will be
7583 referenced from READER, so we must make sure to free it after we're done
7586 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7587 DWO CU, that this test will fail (the attribute will not be present). */
7588 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7589 abbrev_table_up dwo_abbrev_table
;
7592 struct dwo_unit
*dwo_unit
;
7593 struct die_info
*dwo_comp_unit_die
;
7597 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7598 " has children (offset %s) [in module %s]"),
7599 sect_offset_str (this_cu
->sect_off
),
7600 bfd_get_filename (abfd
));
7602 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7603 if (dwo_unit
!= NULL
)
7605 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7606 comp_unit_die
, NULL
,
7608 &dwo_comp_unit_die
, &has_children
,
7609 &dwo_abbrev_table
) == 0)
7614 comp_unit_die
= dwo_comp_unit_die
;
7618 /* Yikes, we couldn't find the rest of the DIE, we only have
7619 the stub. A complaint has already been logged. There's
7620 not much more we can do except pass on the stub DIE to
7621 die_reader_func. We don't want to throw an error on bad
7626 /* All of the above is setup for this call. Yikes. */
7627 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7629 /* Done, clean up. */
7630 if (new_cu
!= NULL
&& keep
)
7632 /* Link this CU into read_in_chain. */
7633 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7634 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7635 /* The chain owns it now. */
7640 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7641 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7642 to have already done the lookup to find the DWO file).
7644 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7645 THIS_CU->is_debug_types, but nothing else.
7647 We fill in THIS_CU->length.
7649 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7650 linker) then DIE_READER_FUNC will not get called.
7652 THIS_CU->cu is always freed when done.
7653 This is done in order to not leave THIS_CU->cu in a state where we have
7654 to care whether it refers to the "main" CU or the DWO CU. */
7657 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7658 struct dwo_file
*dwo_file
,
7659 die_reader_func_ftype
*die_reader_func
,
7662 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7663 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7664 struct dwarf2_section_info
*section
= this_cu
->section
;
7665 bfd
*abfd
= get_section_bfd_owner (section
);
7666 struct dwarf2_section_info
*abbrev_section
;
7667 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7668 struct die_reader_specs reader
;
7669 struct die_info
*comp_unit_die
;
7672 if (dwarf_die_debug
)
7673 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7674 this_cu
->is_debug_types
? "type" : "comp",
7675 sect_offset_str (this_cu
->sect_off
));
7677 gdb_assert (this_cu
->cu
== NULL
);
7679 abbrev_section
= (dwo_file
!= NULL
7680 ? &dwo_file
->sections
.abbrev
7681 : get_abbrev_section_for_cu (this_cu
));
7683 /* This is cheap if the section is already read in. */
7684 dwarf2_read_section (objfile
, section
);
7686 struct dwarf2_cu
cu (this_cu
);
7688 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7689 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7690 &cu
.header
, section
,
7691 abbrev_section
, info_ptr
,
7692 (this_cu
->is_debug_types
7694 : rcuh_kind::COMPILE
));
7696 this_cu
->length
= get_cu_length (&cu
.header
);
7698 /* Skip dummy compilation units. */
7699 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7700 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7703 abbrev_table_up abbrev_table
7704 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7705 cu
.header
.abbrev_sect_off
);
7707 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7708 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7710 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7713 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7714 does not lookup the specified DWO file.
7715 This cannot be used to read DWO files.
7717 THIS_CU->cu is always freed when done.
7718 This is done in order to not leave THIS_CU->cu in a state where we have
7719 to care whether it refers to the "main" CU or the DWO CU.
7720 We can revisit this if the data shows there's a performance issue. */
7723 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7724 die_reader_func_ftype
*die_reader_func
,
7727 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7730 /* Type Unit Groups.
7732 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7733 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7734 so that all types coming from the same compilation (.o file) are grouped
7735 together. A future step could be to put the types in the same symtab as
7736 the CU the types ultimately came from. */
7739 hash_type_unit_group (const void *item
)
7741 const struct type_unit_group
*tu_group
7742 = (const struct type_unit_group
*) item
;
7744 return hash_stmt_list_entry (&tu_group
->hash
);
7748 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7750 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7751 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7753 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7756 /* Allocate a hash table for type unit groups. */
7759 allocate_type_unit_groups_table (struct objfile
*objfile
)
7761 return htab_create_alloc_ex (3,
7762 hash_type_unit_group
,
7765 &objfile
->objfile_obstack
,
7766 hashtab_obstack_allocate
,
7767 dummy_obstack_deallocate
);
7770 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7771 partial symtabs. We combine several TUs per psymtab to not let the size
7772 of any one psymtab grow too big. */
7773 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7774 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7776 /* Helper routine for get_type_unit_group.
7777 Create the type_unit_group object used to hold one or more TUs. */
7779 static struct type_unit_group
*
7780 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7782 struct dwarf2_per_objfile
*dwarf2_per_objfile
7783 = cu
->per_cu
->dwarf2_per_objfile
;
7784 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7785 struct dwarf2_per_cu_data
*per_cu
;
7786 struct type_unit_group
*tu_group
;
7788 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7789 struct type_unit_group
);
7790 per_cu
= &tu_group
->per_cu
;
7791 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7793 if (dwarf2_per_objfile
->using_index
)
7795 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7796 struct dwarf2_per_cu_quick_data
);
7800 unsigned int line_offset
= to_underlying (line_offset_struct
);
7801 struct partial_symtab
*pst
;
7804 /* Give the symtab a useful name for debug purposes. */
7805 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7806 name
= string_printf ("<type_units_%d>",
7807 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7809 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7811 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7815 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7816 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7821 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7822 STMT_LIST is a DW_AT_stmt_list attribute. */
7824 static struct type_unit_group
*
7825 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7827 struct dwarf2_per_objfile
*dwarf2_per_objfile
7828 = cu
->per_cu
->dwarf2_per_objfile
;
7829 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7830 struct type_unit_group
*tu_group
;
7832 unsigned int line_offset
;
7833 struct type_unit_group type_unit_group_for_lookup
;
7835 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7837 dwarf2_per_objfile
->type_unit_groups
=
7838 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7841 /* Do we need to create a new group, or can we use an existing one? */
7845 line_offset
= DW_UNSND (stmt_list
);
7846 ++tu_stats
->nr_symtab_sharers
;
7850 /* Ugh, no stmt_list. Rare, but we have to handle it.
7851 We can do various things here like create one group per TU or
7852 spread them over multiple groups to split up the expansion work.
7853 To avoid worst case scenarios (too many groups or too large groups)
7854 we, umm, group them in bunches. */
7855 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7856 | (tu_stats
->nr_stmt_less_type_units
7857 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7858 ++tu_stats
->nr_stmt_less_type_units
;
7861 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7862 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7863 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7864 &type_unit_group_for_lookup
, INSERT
);
7867 tu_group
= (struct type_unit_group
*) *slot
;
7868 gdb_assert (tu_group
!= NULL
);
7872 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7873 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7875 ++tu_stats
->nr_symtabs
;
7881 /* Partial symbol tables. */
7883 /* Create a psymtab named NAME and assign it to PER_CU.
7885 The caller must fill in the following details:
7886 dirname, textlow, texthigh. */
7888 static struct partial_symtab
*
7889 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7891 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7892 struct partial_symtab
*pst
;
7894 pst
= start_psymtab_common (objfile
, name
, 0);
7896 pst
->psymtabs_addrmap_supported
= 1;
7898 /* This is the glue that links PST into GDB's symbol API. */
7899 pst
->read_symtab_private
= per_cu
;
7900 pst
->read_symtab
= dwarf2_read_symtab
;
7901 per_cu
->v
.psymtab
= pst
;
7906 /* The DATA object passed to process_psymtab_comp_unit_reader has this
7909 struct process_psymtab_comp_unit_data
7911 /* True if we are reading a DW_TAG_partial_unit. */
7913 int want_partial_unit
;
7915 /* The "pretend" language that is used if the CU doesn't declare a
7918 enum language pretend_language
;
7921 /* die_reader_func for process_psymtab_comp_unit. */
7924 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7925 const gdb_byte
*info_ptr
,
7926 struct die_info
*comp_unit_die
,
7930 struct dwarf2_cu
*cu
= reader
->cu
;
7931 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7932 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7933 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7935 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7936 struct partial_symtab
*pst
;
7937 enum pc_bounds_kind cu_bounds_kind
;
7938 const char *filename
;
7939 struct process_psymtab_comp_unit_data
*info
7940 = (struct process_psymtab_comp_unit_data
*) data
;
7942 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
7945 gdb_assert (! per_cu
->is_debug_types
);
7947 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
7949 /* Allocate a new partial symbol table structure. */
7950 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7951 if (filename
== NULL
)
7954 pst
= create_partial_symtab (per_cu
, filename
);
7956 /* This must be done before calling dwarf2_build_include_psymtabs. */
7957 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7959 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7961 dwarf2_find_base_address (comp_unit_die
, cu
);
7963 /* Possibly set the default values of LOWPC and HIGHPC from
7965 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7966 &best_highpc
, cu
, pst
);
7967 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7970 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7973 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7975 /* Store the contiguous range if it is not empty; it can be
7976 empty for CUs with no code. */
7977 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7981 /* Check if comp unit has_children.
7982 If so, read the rest of the partial symbols from this comp unit.
7983 If not, there's no more debug_info for this comp unit. */
7986 struct partial_die_info
*first_die
;
7987 CORE_ADDR lowpc
, highpc
;
7989 lowpc
= ((CORE_ADDR
) -1);
7990 highpc
= ((CORE_ADDR
) 0);
7992 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7994 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7995 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7997 /* If we didn't find a lowpc, set it to highpc to avoid
7998 complaints from `maint check'. */
7999 if (lowpc
== ((CORE_ADDR
) -1))
8002 /* If the compilation unit didn't have an explicit address range,
8003 then use the information extracted from its child dies. */
8004 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
8007 best_highpc
= highpc
;
8010 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
8011 best_lowpc
+ baseaddr
)
8013 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
8014 best_highpc
+ baseaddr
)
8017 end_psymtab_common (objfile
, pst
);
8019 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
8022 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8023 struct dwarf2_per_cu_data
*iter
;
8025 /* Fill in 'dependencies' here; we fill in 'users' in a
8027 pst
->number_of_dependencies
= len
;
8029 = objfile
->partial_symtabs
->allocate_dependencies (len
);
8031 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8034 pst
->dependencies
[i
] = iter
->v
.psymtab
;
8036 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8039 /* Get the list of files included in the current compilation unit,
8040 and build a psymtab for each of them. */
8041 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8043 if (dwarf_read_debug
)
8044 fprintf_unfiltered (gdb_stdlog
,
8045 "Psymtab for %s unit @%s: %s - %s"
8046 ", %d global, %d static syms\n",
8047 per_cu
->is_debug_types
? "type" : "comp",
8048 sect_offset_str (per_cu
->sect_off
),
8049 paddress (gdbarch
, pst
->text_low (objfile
)),
8050 paddress (gdbarch
, pst
->text_high (objfile
)),
8051 pst
->n_global_syms
, pst
->n_static_syms
);
8054 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8055 Process compilation unit THIS_CU for a psymtab. */
8058 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8059 int want_partial_unit
,
8060 enum language pretend_language
)
8062 /* If this compilation unit was already read in, free the
8063 cached copy in order to read it in again. This is
8064 necessary because we skipped some symbols when we first
8065 read in the compilation unit (see load_partial_dies).
8066 This problem could be avoided, but the benefit is unclear. */
8067 if (this_cu
->cu
!= NULL
)
8068 free_one_cached_comp_unit (this_cu
);
8070 if (this_cu
->is_debug_types
)
8071 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8072 build_type_psymtabs_reader
, NULL
);
8075 process_psymtab_comp_unit_data info
;
8076 info
.want_partial_unit
= want_partial_unit
;
8077 info
.pretend_language
= pretend_language
;
8078 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8079 process_psymtab_comp_unit_reader
, &info
);
8082 /* Age out any secondary CUs. */
8083 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8086 /* Reader function for build_type_psymtabs. */
8089 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8090 const gdb_byte
*info_ptr
,
8091 struct die_info
*type_unit_die
,
8095 struct dwarf2_per_objfile
*dwarf2_per_objfile
8096 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8097 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8098 struct dwarf2_cu
*cu
= reader
->cu
;
8099 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8100 struct signatured_type
*sig_type
;
8101 struct type_unit_group
*tu_group
;
8102 struct attribute
*attr
;
8103 struct partial_die_info
*first_die
;
8104 CORE_ADDR lowpc
, highpc
;
8105 struct partial_symtab
*pst
;
8107 gdb_assert (data
== NULL
);
8108 gdb_assert (per_cu
->is_debug_types
);
8109 sig_type
= (struct signatured_type
*) per_cu
;
8114 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8115 tu_group
= get_type_unit_group (cu
, attr
);
8117 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
8119 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8120 pst
= create_partial_symtab (per_cu
, "");
8123 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8125 lowpc
= (CORE_ADDR
) -1;
8126 highpc
= (CORE_ADDR
) 0;
8127 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8129 end_psymtab_common (objfile
, pst
);
8132 /* Struct used to sort TUs by their abbreviation table offset. */
8134 struct tu_abbrev_offset
8136 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
8137 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
8140 signatured_type
*sig_type
;
8141 sect_offset abbrev_offset
;
8144 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8147 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8148 const struct tu_abbrev_offset
&b
)
8150 return a
.abbrev_offset
< b
.abbrev_offset
;
8153 /* Efficiently read all the type units.
8154 This does the bulk of the work for build_type_psymtabs.
8156 The efficiency is because we sort TUs by the abbrev table they use and
8157 only read each abbrev table once. In one program there are 200K TUs
8158 sharing 8K abbrev tables.
8160 The main purpose of this function is to support building the
8161 dwarf2_per_objfile->type_unit_groups table.
8162 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8163 can collapse the search space by grouping them by stmt_list.
8164 The savings can be significant, in the same program from above the 200K TUs
8165 share 8K stmt_list tables.
8167 FUNC is expected to call get_type_unit_group, which will create the
8168 struct type_unit_group if necessary and add it to
8169 dwarf2_per_objfile->type_unit_groups. */
8172 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8174 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8175 abbrev_table_up abbrev_table
;
8176 sect_offset abbrev_offset
;
8178 /* It's up to the caller to not call us multiple times. */
8179 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8181 if (dwarf2_per_objfile
->all_type_units
.empty ())
8184 /* TUs typically share abbrev tables, and there can be way more TUs than
8185 abbrev tables. Sort by abbrev table to reduce the number of times we
8186 read each abbrev table in.
8187 Alternatives are to punt or to maintain a cache of abbrev tables.
8188 This is simpler and efficient enough for now.
8190 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8191 symtab to use). Typically TUs with the same abbrev offset have the same
8192 stmt_list value too so in practice this should work well.
8194 The basic algorithm here is:
8196 sort TUs by abbrev table
8197 for each TU with same abbrev table:
8198 read abbrev table if first user
8199 read TU top level DIE
8200 [IWBN if DWO skeletons had DW_AT_stmt_list]
8203 if (dwarf_read_debug
)
8204 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8206 /* Sort in a separate table to maintain the order of all_type_units
8207 for .gdb_index: TU indices directly index all_type_units. */
8208 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
8209 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
8211 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
8212 sorted_by_abbrev
.emplace_back
8213 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
8214 sig_type
->per_cu
.section
,
8215 sig_type
->per_cu
.sect_off
));
8217 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8218 sort_tu_by_abbrev_offset
);
8220 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8222 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
8224 /* Switch to the next abbrev table if necessary. */
8225 if (abbrev_table
== NULL
8226 || tu
.abbrev_offset
!= abbrev_offset
)
8228 abbrev_offset
= tu
.abbrev_offset
;
8230 abbrev_table_read_table (dwarf2_per_objfile
,
8231 &dwarf2_per_objfile
->abbrev
,
8233 ++tu_stats
->nr_uniq_abbrev_tables
;
8236 init_cutu_and_read_dies (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
8237 0, 0, false, build_type_psymtabs_reader
, NULL
);
8241 /* Print collected type unit statistics. */
8244 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8246 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8248 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8249 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8250 dwarf2_per_objfile
->all_type_units
.size ());
8251 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8252 tu_stats
->nr_uniq_abbrev_tables
);
8253 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8254 tu_stats
->nr_symtabs
);
8255 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8256 tu_stats
->nr_symtab_sharers
);
8257 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8258 tu_stats
->nr_stmt_less_type_units
);
8259 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8260 tu_stats
->nr_all_type_units_reallocs
);
8263 /* Traversal function for build_type_psymtabs. */
8266 build_type_psymtab_dependencies (void **slot
, void *info
)
8268 struct dwarf2_per_objfile
*dwarf2_per_objfile
8269 = (struct dwarf2_per_objfile
*) info
;
8270 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8271 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8272 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8273 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8274 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
8275 struct signatured_type
*iter
;
8278 gdb_assert (len
> 0);
8279 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8281 pst
->number_of_dependencies
= len
;
8282 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
8284 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
8287 gdb_assert (iter
->per_cu
.is_debug_types
);
8288 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8289 iter
->type_unit_group
= tu_group
;
8292 VEC_free (sig_type_ptr
, tu_group
->tus
);
8297 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8298 Build partial symbol tables for the .debug_types comp-units. */
8301 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8303 if (! create_all_type_units (dwarf2_per_objfile
))
8306 build_type_psymtabs_1 (dwarf2_per_objfile
);
8309 /* Traversal function for process_skeletonless_type_unit.
8310 Read a TU in a DWO file and build partial symbols for it. */
8313 process_skeletonless_type_unit (void **slot
, void *info
)
8315 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8316 struct dwarf2_per_objfile
*dwarf2_per_objfile
8317 = (struct dwarf2_per_objfile
*) info
;
8318 struct signatured_type find_entry
, *entry
;
8320 /* If this TU doesn't exist in the global table, add it and read it in. */
8322 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8324 dwarf2_per_objfile
->signatured_types
8325 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8328 find_entry
.signature
= dwo_unit
->signature
;
8329 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8331 /* If we've already seen this type there's nothing to do. What's happening
8332 is we're doing our own version of comdat-folding here. */
8336 /* This does the job that create_all_type_units would have done for
8338 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8339 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8342 /* This does the job that build_type_psymtabs_1 would have done. */
8343 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0, false,
8344 build_type_psymtabs_reader
, NULL
);
8349 /* Traversal function for process_skeletonless_type_units. */
8352 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8354 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8356 if (dwo_file
->tus
!= NULL
)
8358 htab_traverse_noresize (dwo_file
->tus
,
8359 process_skeletonless_type_unit
, info
);
8365 /* Scan all TUs of DWO files, verifying we've processed them.
8366 This is needed in case a TU was emitted without its skeleton.
8367 Note: This can't be done until we know what all the DWO files are. */
8370 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8372 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8373 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8374 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8376 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
8377 process_dwo_file_for_skeletonless_type_units
,
8378 dwarf2_per_objfile
);
8382 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8385 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8387 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8389 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8394 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8396 /* Set the 'user' field only if it is not already set. */
8397 if (pst
->dependencies
[j
]->user
== NULL
)
8398 pst
->dependencies
[j
]->user
= pst
;
8403 /* Build the partial symbol table by doing a quick pass through the
8404 .debug_info and .debug_abbrev sections. */
8407 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8409 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8411 if (dwarf_read_debug
)
8413 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8414 objfile_name (objfile
));
8417 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8419 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8421 /* Any cached compilation units will be linked by the per-objfile
8422 read_in_chain. Make sure to free them when we're done. */
8423 free_cached_comp_units
freer (dwarf2_per_objfile
);
8425 build_type_psymtabs (dwarf2_per_objfile
);
8427 create_all_comp_units (dwarf2_per_objfile
);
8429 /* Create a temporary address map on a temporary obstack. We later
8430 copy this to the final obstack. */
8431 auto_obstack temp_obstack
;
8433 scoped_restore save_psymtabs_addrmap
8434 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
8435 addrmap_create_mutable (&temp_obstack
));
8437 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8438 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8440 /* This has to wait until we read the CUs, we need the list of DWOs. */
8441 process_skeletonless_type_units (dwarf2_per_objfile
);
8443 /* Now that all TUs have been processed we can fill in the dependencies. */
8444 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8446 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8447 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8450 if (dwarf_read_debug
)
8451 print_tu_stats (dwarf2_per_objfile
);
8453 set_partial_user (dwarf2_per_objfile
);
8455 objfile
->partial_symtabs
->psymtabs_addrmap
8456 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
8457 objfile
->partial_symtabs
->obstack ());
8458 /* At this point we want to keep the address map. */
8459 save_psymtabs_addrmap
.release ();
8461 if (dwarf_read_debug
)
8462 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8463 objfile_name (objfile
));
8466 /* die_reader_func for load_partial_comp_unit. */
8469 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8470 const gdb_byte
*info_ptr
,
8471 struct die_info
*comp_unit_die
,
8475 struct dwarf2_cu
*cu
= reader
->cu
;
8477 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8479 /* Check if comp unit has_children.
8480 If so, read the rest of the partial symbols from this comp unit.
8481 If not, there's no more debug_info for this comp unit. */
8483 load_partial_dies (reader
, info_ptr
, 0);
8486 /* Load the partial DIEs for a secondary CU into memory.
8487 This is also used when rereading a primary CU with load_all_dies. */
8490 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8492 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, false,
8493 load_partial_comp_unit_reader
, NULL
);
8497 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8498 struct dwarf2_section_info
*section
,
8499 struct dwarf2_section_info
*abbrev_section
,
8500 unsigned int is_dwz
)
8502 const gdb_byte
*info_ptr
;
8503 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8505 if (dwarf_read_debug
)
8506 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8507 get_section_name (section
),
8508 get_section_file_name (section
));
8510 dwarf2_read_section (objfile
, section
);
8512 info_ptr
= section
->buffer
;
8514 while (info_ptr
< section
->buffer
+ section
->size
)
8516 struct dwarf2_per_cu_data
*this_cu
;
8518 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8520 comp_unit_head cu_header
;
8521 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8522 abbrev_section
, info_ptr
,
8523 rcuh_kind::COMPILE
);
8525 /* Save the compilation unit for later lookup. */
8526 if (cu_header
.unit_type
!= DW_UT_type
)
8528 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8529 struct dwarf2_per_cu_data
);
8530 memset (this_cu
, 0, sizeof (*this_cu
));
8534 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8535 struct signatured_type
);
8536 memset (sig_type
, 0, sizeof (*sig_type
));
8537 sig_type
->signature
= cu_header
.signature
;
8538 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8539 this_cu
= &sig_type
->per_cu
;
8541 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8542 this_cu
->sect_off
= sect_off
;
8543 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8544 this_cu
->is_dwz
= is_dwz
;
8545 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8546 this_cu
->section
= section
;
8548 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8550 info_ptr
= info_ptr
+ this_cu
->length
;
8554 /* Create a list of all compilation units in OBJFILE.
8555 This is only done for -readnow and building partial symtabs. */
8558 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8560 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8561 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8562 &dwarf2_per_objfile
->abbrev
, 0);
8564 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8566 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8570 /* Process all loaded DIEs for compilation unit CU, starting at
8571 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8572 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8573 DW_AT_ranges). See the comments of add_partial_subprogram on how
8574 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8577 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8578 CORE_ADDR
*highpc
, int set_addrmap
,
8579 struct dwarf2_cu
*cu
)
8581 struct partial_die_info
*pdi
;
8583 /* Now, march along the PDI's, descending into ones which have
8584 interesting children but skipping the children of the other ones,
8585 until we reach the end of the compilation unit. */
8593 /* Anonymous namespaces or modules have no name but have interesting
8594 children, so we need to look at them. Ditto for anonymous
8597 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8598 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8599 || pdi
->tag
== DW_TAG_imported_unit
8600 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8604 case DW_TAG_subprogram
:
8605 case DW_TAG_inlined_subroutine
:
8606 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8608 case DW_TAG_constant
:
8609 case DW_TAG_variable
:
8610 case DW_TAG_typedef
:
8611 case DW_TAG_union_type
:
8612 if (!pdi
->is_declaration
)
8614 add_partial_symbol (pdi
, cu
);
8617 case DW_TAG_class_type
:
8618 case DW_TAG_interface_type
:
8619 case DW_TAG_structure_type
:
8620 if (!pdi
->is_declaration
)
8622 add_partial_symbol (pdi
, cu
);
8624 if ((cu
->language
== language_rust
8625 || cu
->language
== language_cplus
) && pdi
->has_children
)
8626 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8629 case DW_TAG_enumeration_type
:
8630 if (!pdi
->is_declaration
)
8631 add_partial_enumeration (pdi
, cu
);
8633 case DW_TAG_base_type
:
8634 case DW_TAG_subrange_type
:
8635 /* File scope base type definitions are added to the partial
8637 add_partial_symbol (pdi
, cu
);
8639 case DW_TAG_namespace
:
8640 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8643 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8645 case DW_TAG_imported_unit
:
8647 struct dwarf2_per_cu_data
*per_cu
;
8649 /* For now we don't handle imported units in type units. */
8650 if (cu
->per_cu
->is_debug_types
)
8652 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8653 " supported in type units [in module %s]"),
8654 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8657 per_cu
= dwarf2_find_containing_comp_unit
8658 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8659 cu
->per_cu
->dwarf2_per_objfile
);
8661 /* Go read the partial unit, if needed. */
8662 if (per_cu
->v
.psymtab
== NULL
)
8663 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8665 VEC_safe_push (dwarf2_per_cu_ptr
,
8666 cu
->per_cu
->imported_symtabs
, per_cu
);
8669 case DW_TAG_imported_declaration
:
8670 add_partial_symbol (pdi
, cu
);
8677 /* If the die has a sibling, skip to the sibling. */
8679 pdi
= pdi
->die_sibling
;
8683 /* Functions used to compute the fully scoped name of a partial DIE.
8685 Normally, this is simple. For C++, the parent DIE's fully scoped
8686 name is concatenated with "::" and the partial DIE's name.
8687 Enumerators are an exception; they use the scope of their parent
8688 enumeration type, i.e. the name of the enumeration type is not
8689 prepended to the enumerator.
8691 There are two complexities. One is DW_AT_specification; in this
8692 case "parent" means the parent of the target of the specification,
8693 instead of the direct parent of the DIE. The other is compilers
8694 which do not emit DW_TAG_namespace; in this case we try to guess
8695 the fully qualified name of structure types from their members'
8696 linkage names. This must be done using the DIE's children rather
8697 than the children of any DW_AT_specification target. We only need
8698 to do this for structures at the top level, i.e. if the target of
8699 any DW_AT_specification (if any; otherwise the DIE itself) does not
8702 /* Compute the scope prefix associated with PDI's parent, in
8703 compilation unit CU. The result will be allocated on CU's
8704 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8705 field. NULL is returned if no prefix is necessary. */
8707 partial_die_parent_scope (struct partial_die_info
*pdi
,
8708 struct dwarf2_cu
*cu
)
8710 const char *grandparent_scope
;
8711 struct partial_die_info
*parent
, *real_pdi
;
8713 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8714 then this means the parent of the specification DIE. */
8717 while (real_pdi
->has_specification
)
8719 auto res
= find_partial_die (real_pdi
->spec_offset
,
8720 real_pdi
->spec_is_dwz
, cu
);
8725 parent
= real_pdi
->die_parent
;
8729 if (parent
->scope_set
)
8730 return parent
->scope
;
8734 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8736 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8737 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8738 Work around this problem here. */
8739 if (cu
->language
== language_cplus
8740 && parent
->tag
== DW_TAG_namespace
8741 && strcmp (parent
->name
, "::") == 0
8742 && grandparent_scope
== NULL
)
8744 parent
->scope
= NULL
;
8745 parent
->scope_set
= 1;
8749 if (pdi
->tag
== DW_TAG_enumerator
)
8750 /* Enumerators should not get the name of the enumeration as a prefix. */
8751 parent
->scope
= grandparent_scope
;
8752 else if (parent
->tag
== DW_TAG_namespace
8753 || parent
->tag
== DW_TAG_module
8754 || parent
->tag
== DW_TAG_structure_type
8755 || parent
->tag
== DW_TAG_class_type
8756 || parent
->tag
== DW_TAG_interface_type
8757 || parent
->tag
== DW_TAG_union_type
8758 || parent
->tag
== DW_TAG_enumeration_type
)
8760 if (grandparent_scope
== NULL
)
8761 parent
->scope
= parent
->name
;
8763 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8765 parent
->name
, 0, cu
);
8769 /* FIXME drow/2004-04-01: What should we be doing with
8770 function-local names? For partial symbols, we should probably be
8772 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8773 dwarf_tag_name (parent
->tag
),
8774 sect_offset_str (pdi
->sect_off
));
8775 parent
->scope
= grandparent_scope
;
8778 parent
->scope_set
= 1;
8779 return parent
->scope
;
8782 /* Return the fully scoped name associated with PDI, from compilation unit
8783 CU. The result will be allocated with malloc. */
8786 partial_die_full_name (struct partial_die_info
*pdi
,
8787 struct dwarf2_cu
*cu
)
8789 const char *parent_scope
;
8791 /* If this is a template instantiation, we can not work out the
8792 template arguments from partial DIEs. So, unfortunately, we have
8793 to go through the full DIEs. At least any work we do building
8794 types here will be reused if full symbols are loaded later. */
8795 if (pdi
->has_template_arguments
)
8799 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8801 struct die_info
*die
;
8802 struct attribute attr
;
8803 struct dwarf2_cu
*ref_cu
= cu
;
8805 /* DW_FORM_ref_addr is using section offset. */
8806 attr
.name
= (enum dwarf_attribute
) 0;
8807 attr
.form
= DW_FORM_ref_addr
;
8808 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8809 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8811 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8815 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8816 if (parent_scope
== NULL
)
8819 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8823 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8825 struct dwarf2_per_objfile
*dwarf2_per_objfile
8826 = cu
->per_cu
->dwarf2_per_objfile
;
8827 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8828 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8830 const char *actual_name
= NULL
;
8832 char *built_actual_name
;
8834 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8836 built_actual_name
= partial_die_full_name (pdi
, cu
);
8837 if (built_actual_name
!= NULL
)
8838 actual_name
= built_actual_name
;
8840 if (actual_name
== NULL
)
8841 actual_name
= pdi
->name
;
8845 case DW_TAG_inlined_subroutine
:
8846 case DW_TAG_subprogram
:
8847 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8849 if (pdi
->is_external
|| cu
->language
== language_ada
)
8851 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
8852 of the global scope. But in Ada, we want to be able to access
8853 nested procedures globally. So all Ada subprograms are stored
8854 in the global scope. */
8855 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8856 built_actual_name
!= NULL
,
8857 VAR_DOMAIN
, LOC_BLOCK
,
8858 SECT_OFF_TEXT (objfile
),
8859 psymbol_placement::GLOBAL
,
8861 cu
->language
, objfile
);
8865 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8866 built_actual_name
!= NULL
,
8867 VAR_DOMAIN
, LOC_BLOCK
,
8868 SECT_OFF_TEXT (objfile
),
8869 psymbol_placement::STATIC
,
8870 addr
, cu
->language
, objfile
);
8873 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8874 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8876 case DW_TAG_constant
:
8877 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8878 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8879 -1, (pdi
->is_external
8880 ? psymbol_placement::GLOBAL
8881 : psymbol_placement::STATIC
),
8882 0, cu
->language
, objfile
);
8884 case DW_TAG_variable
:
8886 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8890 && !dwarf2_per_objfile
->has_section_at_zero
)
8892 /* A global or static variable may also have been stripped
8893 out by the linker if unused, in which case its address
8894 will be nullified; do not add such variables into partial
8895 symbol table then. */
8897 else if (pdi
->is_external
)
8900 Don't enter into the minimal symbol tables as there is
8901 a minimal symbol table entry from the ELF symbols already.
8902 Enter into partial symbol table if it has a location
8903 descriptor or a type.
8904 If the location descriptor is missing, new_symbol will create
8905 a LOC_UNRESOLVED symbol, the address of the variable will then
8906 be determined from the minimal symbol table whenever the variable
8908 The address for the partial symbol table entry is not
8909 used by GDB, but it comes in handy for debugging partial symbol
8912 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8913 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8914 built_actual_name
!= NULL
,
8915 VAR_DOMAIN
, LOC_STATIC
,
8916 SECT_OFF_TEXT (objfile
),
8917 psymbol_placement::GLOBAL
,
8918 addr
, cu
->language
, objfile
);
8922 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8924 /* Static Variable. Skip symbols whose value we cannot know (those
8925 without location descriptors or constant values). */
8926 if (!has_loc
&& !pdi
->has_const_value
)
8928 xfree (built_actual_name
);
8932 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8933 built_actual_name
!= NULL
,
8934 VAR_DOMAIN
, LOC_STATIC
,
8935 SECT_OFF_TEXT (objfile
),
8936 psymbol_placement::STATIC
,
8938 cu
->language
, objfile
);
8941 case DW_TAG_typedef
:
8942 case DW_TAG_base_type
:
8943 case DW_TAG_subrange_type
:
8944 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8945 built_actual_name
!= NULL
,
8946 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8947 psymbol_placement::STATIC
,
8948 0, cu
->language
, objfile
);
8950 case DW_TAG_imported_declaration
:
8951 case DW_TAG_namespace
:
8952 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8953 built_actual_name
!= NULL
,
8954 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8955 psymbol_placement::GLOBAL
,
8956 0, cu
->language
, objfile
);
8959 /* With Fortran 77 there might be a "BLOCK DATA" module
8960 available without any name. If so, we skip the module as it
8961 doesn't bring any value. */
8962 if (actual_name
!= nullptr)
8963 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8964 built_actual_name
!= NULL
,
8965 MODULE_DOMAIN
, LOC_TYPEDEF
, -1,
8966 psymbol_placement::GLOBAL
,
8967 0, cu
->language
, objfile
);
8969 case DW_TAG_class_type
:
8970 case DW_TAG_interface_type
:
8971 case DW_TAG_structure_type
:
8972 case DW_TAG_union_type
:
8973 case DW_TAG_enumeration_type
:
8974 /* Skip external references. The DWARF standard says in the section
8975 about "Structure, Union, and Class Type Entries": "An incomplete
8976 structure, union or class type is represented by a structure,
8977 union or class entry that does not have a byte size attribute
8978 and that has a DW_AT_declaration attribute." */
8979 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8981 xfree (built_actual_name
);
8985 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8986 static vs. global. */
8987 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8988 built_actual_name
!= NULL
,
8989 STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
8990 cu
->language
== language_cplus
8991 ? psymbol_placement::GLOBAL
8992 : psymbol_placement::STATIC
,
8993 0, cu
->language
, objfile
);
8996 case DW_TAG_enumerator
:
8997 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8998 built_actual_name
!= NULL
,
8999 VAR_DOMAIN
, LOC_CONST
, -1,
9000 cu
->language
== language_cplus
9001 ? psymbol_placement::GLOBAL
9002 : psymbol_placement::STATIC
,
9003 0, cu
->language
, objfile
);
9009 xfree (built_actual_name
);
9012 /* Read a partial die corresponding to a namespace; also, add a symbol
9013 corresponding to that namespace to the symbol table. NAMESPACE is
9014 the name of the enclosing namespace. */
9017 add_partial_namespace (struct partial_die_info
*pdi
,
9018 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9019 int set_addrmap
, struct dwarf2_cu
*cu
)
9021 /* Add a symbol for the namespace. */
9023 add_partial_symbol (pdi
, cu
);
9025 /* Now scan partial symbols in that namespace. */
9027 if (pdi
->has_children
)
9028 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9031 /* Read a partial die corresponding to a Fortran module. */
9034 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
9035 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
9037 /* Add a symbol for the namespace. */
9039 add_partial_symbol (pdi
, cu
);
9041 /* Now scan partial symbols in that module. */
9043 if (pdi
->has_children
)
9044 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9047 /* Read a partial die corresponding to a subprogram or an inlined
9048 subprogram and create a partial symbol for that subprogram.
9049 When the CU language allows it, this routine also defines a partial
9050 symbol for each nested subprogram that this subprogram contains.
9051 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9052 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9054 PDI may also be a lexical block, in which case we simply search
9055 recursively for subprograms defined inside that lexical block.
9056 Again, this is only performed when the CU language allows this
9057 type of definitions. */
9060 add_partial_subprogram (struct partial_die_info
*pdi
,
9061 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9062 int set_addrmap
, struct dwarf2_cu
*cu
)
9064 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9066 if (pdi
->has_pc_info
)
9068 if (pdi
->lowpc
< *lowpc
)
9069 *lowpc
= pdi
->lowpc
;
9070 if (pdi
->highpc
> *highpc
)
9071 *highpc
= pdi
->highpc
;
9074 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9075 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9077 CORE_ADDR this_highpc
;
9078 CORE_ADDR this_lowpc
;
9080 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9081 SECT_OFF_TEXT (objfile
));
9083 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
9084 pdi
->lowpc
+ baseaddr
)
9087 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
9088 pdi
->highpc
+ baseaddr
)
9090 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
9091 this_lowpc
, this_highpc
- 1,
9092 cu
->per_cu
->v
.psymtab
);
9096 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9098 if (!pdi
->is_declaration
)
9099 /* Ignore subprogram DIEs that do not have a name, they are
9100 illegal. Do not emit a complaint at this point, we will
9101 do so when we convert this psymtab into a symtab. */
9103 add_partial_symbol (pdi
, cu
);
9107 if (! pdi
->has_children
)
9110 if (cu
->language
== language_ada
)
9112 pdi
= pdi
->die_child
;
9116 if (pdi
->tag
== DW_TAG_subprogram
9117 || pdi
->tag
== DW_TAG_inlined_subroutine
9118 || pdi
->tag
== DW_TAG_lexical_block
)
9119 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9120 pdi
= pdi
->die_sibling
;
9125 /* Read a partial die corresponding to an enumeration type. */
9128 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9129 struct dwarf2_cu
*cu
)
9131 struct partial_die_info
*pdi
;
9133 if (enum_pdi
->name
!= NULL
)
9134 add_partial_symbol (enum_pdi
, cu
);
9136 pdi
= enum_pdi
->die_child
;
9139 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9140 complaint (_("malformed enumerator DIE ignored"));
9142 add_partial_symbol (pdi
, cu
);
9143 pdi
= pdi
->die_sibling
;
9147 /* Return the initial uleb128 in the die at INFO_PTR. */
9150 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9152 unsigned int bytes_read
;
9154 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9157 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9158 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9160 Return the corresponding abbrev, or NULL if the number is zero (indicating
9161 an empty DIE). In either case *BYTES_READ will be set to the length of
9162 the initial number. */
9164 static struct abbrev_info
*
9165 peek_die_abbrev (const die_reader_specs
&reader
,
9166 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9168 dwarf2_cu
*cu
= reader
.cu
;
9169 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9170 unsigned int abbrev_number
9171 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9173 if (abbrev_number
== 0)
9176 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9179 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9180 " at offset %s [in module %s]"),
9181 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9182 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9188 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9189 Returns a pointer to the end of a series of DIEs, terminated by an empty
9190 DIE. Any children of the skipped DIEs will also be skipped. */
9192 static const gdb_byte
*
9193 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9197 unsigned int bytes_read
;
9198 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9201 return info_ptr
+ bytes_read
;
9203 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9207 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9208 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9209 abbrev corresponding to that skipped uleb128 should be passed in
9210 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9213 static const gdb_byte
*
9214 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9215 struct abbrev_info
*abbrev
)
9217 unsigned int bytes_read
;
9218 struct attribute attr
;
9219 bfd
*abfd
= reader
->abfd
;
9220 struct dwarf2_cu
*cu
= reader
->cu
;
9221 const gdb_byte
*buffer
= reader
->buffer
;
9222 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9223 unsigned int form
, i
;
9225 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9227 /* The only abbrev we care about is DW_AT_sibling. */
9228 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9230 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9231 if (attr
.form
== DW_FORM_ref_addr
)
9232 complaint (_("ignoring absolute DW_AT_sibling"));
9235 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9236 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9238 if (sibling_ptr
< info_ptr
)
9239 complaint (_("DW_AT_sibling points backwards"));
9240 else if (sibling_ptr
> reader
->buffer_end
)
9241 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9247 /* If it isn't DW_AT_sibling, skip this attribute. */
9248 form
= abbrev
->attrs
[i
].form
;
9252 case DW_FORM_ref_addr
:
9253 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9254 and later it is offset sized. */
9255 if (cu
->header
.version
== 2)
9256 info_ptr
+= cu
->header
.addr_size
;
9258 info_ptr
+= cu
->header
.offset_size
;
9260 case DW_FORM_GNU_ref_alt
:
9261 info_ptr
+= cu
->header
.offset_size
;
9264 info_ptr
+= cu
->header
.addr_size
;
9271 case DW_FORM_flag_present
:
9272 case DW_FORM_implicit_const
:
9284 case DW_FORM_ref_sig8
:
9287 case DW_FORM_data16
:
9290 case DW_FORM_string
:
9291 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9292 info_ptr
+= bytes_read
;
9294 case DW_FORM_sec_offset
:
9296 case DW_FORM_GNU_strp_alt
:
9297 info_ptr
+= cu
->header
.offset_size
;
9299 case DW_FORM_exprloc
:
9301 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9302 info_ptr
+= bytes_read
;
9304 case DW_FORM_block1
:
9305 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9307 case DW_FORM_block2
:
9308 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9310 case DW_FORM_block4
:
9311 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9317 case DW_FORM_ref_udata
:
9318 case DW_FORM_GNU_addr_index
:
9319 case DW_FORM_GNU_str_index
:
9320 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9322 case DW_FORM_indirect
:
9323 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9324 info_ptr
+= bytes_read
;
9325 /* We need to continue parsing from here, so just go back to
9327 goto skip_attribute
;
9330 error (_("Dwarf Error: Cannot handle %s "
9331 "in DWARF reader [in module %s]"),
9332 dwarf_form_name (form
),
9333 bfd_get_filename (abfd
));
9337 if (abbrev
->has_children
)
9338 return skip_children (reader
, info_ptr
);
9343 /* Locate ORIG_PDI's sibling.
9344 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9346 static const gdb_byte
*
9347 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9348 struct partial_die_info
*orig_pdi
,
9349 const gdb_byte
*info_ptr
)
9351 /* Do we know the sibling already? */
9353 if (orig_pdi
->sibling
)
9354 return orig_pdi
->sibling
;
9356 /* Are there any children to deal with? */
9358 if (!orig_pdi
->has_children
)
9361 /* Skip the children the long way. */
9363 return skip_children (reader
, info_ptr
);
9366 /* Expand this partial symbol table into a full symbol table. SELF is
9370 dwarf2_read_symtab (struct partial_symtab
*self
,
9371 struct objfile
*objfile
)
9373 struct dwarf2_per_objfile
*dwarf2_per_objfile
9374 = get_dwarf2_per_objfile (objfile
);
9378 warning (_("bug: psymtab for %s is already read in."),
9385 printf_filtered (_("Reading in symbols for %s..."),
9387 gdb_flush (gdb_stdout
);
9390 /* If this psymtab is constructed from a debug-only objfile, the
9391 has_section_at_zero flag will not necessarily be correct. We
9392 can get the correct value for this flag by looking at the data
9393 associated with the (presumably stripped) associated objfile. */
9394 if (objfile
->separate_debug_objfile_backlink
)
9396 struct dwarf2_per_objfile
*dpo_backlink
9397 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9399 dwarf2_per_objfile
->has_section_at_zero
9400 = dpo_backlink
->has_section_at_zero
;
9403 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9405 psymtab_to_symtab_1 (self
);
9407 /* Finish up the debug error message. */
9409 printf_filtered (_("done.\n"));
9412 process_cu_includes (dwarf2_per_objfile
);
9415 /* Reading in full CUs. */
9417 /* Add PER_CU to the queue. */
9420 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9421 enum language pretend_language
)
9423 struct dwarf2_queue_item
*item
;
9426 item
= XNEW (struct dwarf2_queue_item
);
9427 item
->per_cu
= per_cu
;
9428 item
->pretend_language
= pretend_language
;
9431 if (dwarf2_queue
== NULL
)
9432 dwarf2_queue
= item
;
9434 dwarf2_queue_tail
->next
= item
;
9436 dwarf2_queue_tail
= item
;
9439 /* If PER_CU is not yet queued, add it to the queue.
9440 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9442 The result is non-zero if PER_CU was queued, otherwise the result is zero
9443 meaning either PER_CU is already queued or it is already loaded.
9445 N.B. There is an invariant here that if a CU is queued then it is loaded.
9446 The caller is required to load PER_CU if we return non-zero. */
9449 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9450 struct dwarf2_per_cu_data
*per_cu
,
9451 enum language pretend_language
)
9453 /* We may arrive here during partial symbol reading, if we need full
9454 DIEs to process an unusual case (e.g. template arguments). Do
9455 not queue PER_CU, just tell our caller to load its DIEs. */
9456 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9458 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9463 /* Mark the dependence relation so that we don't flush PER_CU
9465 if (dependent_cu
!= NULL
)
9466 dwarf2_add_dependence (dependent_cu
, per_cu
);
9468 /* If it's already on the queue, we have nothing to do. */
9472 /* If the compilation unit is already loaded, just mark it as
9474 if (per_cu
->cu
!= NULL
)
9476 per_cu
->cu
->last_used
= 0;
9480 /* Add it to the queue. */
9481 queue_comp_unit (per_cu
, pretend_language
);
9486 /* Process the queue. */
9489 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9491 struct dwarf2_queue_item
*item
, *next_item
;
9493 if (dwarf_read_debug
)
9495 fprintf_unfiltered (gdb_stdlog
,
9496 "Expanding one or more symtabs of objfile %s ...\n",
9497 objfile_name (dwarf2_per_objfile
->objfile
));
9500 /* The queue starts out with one item, but following a DIE reference
9501 may load a new CU, adding it to the end of the queue. */
9502 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9504 if ((dwarf2_per_objfile
->using_index
9505 ? !item
->per_cu
->v
.quick
->compunit_symtab
9506 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9507 /* Skip dummy CUs. */
9508 && item
->per_cu
->cu
!= NULL
)
9510 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9511 unsigned int debug_print_threshold
;
9514 if (per_cu
->is_debug_types
)
9516 struct signatured_type
*sig_type
=
9517 (struct signatured_type
*) per_cu
;
9519 sprintf (buf
, "TU %s at offset %s",
9520 hex_string (sig_type
->signature
),
9521 sect_offset_str (per_cu
->sect_off
));
9522 /* There can be 100s of TUs.
9523 Only print them in verbose mode. */
9524 debug_print_threshold
= 2;
9528 sprintf (buf
, "CU at offset %s",
9529 sect_offset_str (per_cu
->sect_off
));
9530 debug_print_threshold
= 1;
9533 if (dwarf_read_debug
>= debug_print_threshold
)
9534 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9536 if (per_cu
->is_debug_types
)
9537 process_full_type_unit (per_cu
, item
->pretend_language
);
9539 process_full_comp_unit (per_cu
, item
->pretend_language
);
9541 if (dwarf_read_debug
>= debug_print_threshold
)
9542 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9545 item
->per_cu
->queued
= 0;
9546 next_item
= item
->next
;
9550 dwarf2_queue_tail
= NULL
;
9552 if (dwarf_read_debug
)
9554 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9555 objfile_name (dwarf2_per_objfile
->objfile
));
9559 /* Read in full symbols for PST, and anything it depends on. */
9562 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9564 struct dwarf2_per_cu_data
*per_cu
;
9570 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9571 if (!pst
->dependencies
[i
]->readin
9572 && pst
->dependencies
[i
]->user
== NULL
)
9574 /* Inform about additional files that need to be read in. */
9577 /* FIXME: i18n: Need to make this a single string. */
9578 fputs_filtered (" ", gdb_stdout
);
9580 fputs_filtered ("and ", gdb_stdout
);
9582 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9583 wrap_here (""); /* Flush output. */
9584 gdb_flush (gdb_stdout
);
9586 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9589 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9593 /* It's an include file, no symbols to read for it.
9594 Everything is in the parent symtab. */
9599 dw2_do_instantiate_symtab (per_cu
, false);
9602 /* Trivial hash function for die_info: the hash value of a DIE
9603 is its offset in .debug_info for this objfile. */
9606 die_hash (const void *item
)
9608 const struct die_info
*die
= (const struct die_info
*) item
;
9610 return to_underlying (die
->sect_off
);
9613 /* Trivial comparison function for die_info structures: two DIEs
9614 are equal if they have the same offset. */
9617 die_eq (const void *item_lhs
, const void *item_rhs
)
9619 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9620 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9622 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9625 /* die_reader_func for load_full_comp_unit.
9626 This is identical to read_signatured_type_reader,
9627 but is kept separate for now. */
9630 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9631 const gdb_byte
*info_ptr
,
9632 struct die_info
*comp_unit_die
,
9636 struct dwarf2_cu
*cu
= reader
->cu
;
9637 enum language
*language_ptr
= (enum language
*) data
;
9639 gdb_assert (cu
->die_hash
== NULL
);
9641 htab_create_alloc_ex (cu
->header
.length
/ 12,
9645 &cu
->comp_unit_obstack
,
9646 hashtab_obstack_allocate
,
9647 dummy_obstack_deallocate
);
9650 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9651 &info_ptr
, comp_unit_die
);
9652 cu
->dies
= comp_unit_die
;
9653 /* comp_unit_die is not stored in die_hash, no need. */
9655 /* We try not to read any attributes in this function, because not
9656 all CUs needed for references have been loaded yet, and symbol
9657 table processing isn't initialized. But we have to set the CU language,
9658 or we won't be able to build types correctly.
9659 Similarly, if we do not read the producer, we can not apply
9660 producer-specific interpretation. */
9661 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9664 /* Load the DIEs associated with PER_CU into memory. */
9667 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9669 enum language pretend_language
)
9671 gdb_assert (! this_cu
->is_debug_types
);
9673 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, skip_partial
,
9674 load_full_comp_unit_reader
, &pretend_language
);
9677 /* Add a DIE to the delayed physname list. */
9680 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9681 const char *name
, struct die_info
*die
,
9682 struct dwarf2_cu
*cu
)
9684 struct delayed_method_info mi
;
9686 mi
.fnfield_index
= fnfield_index
;
9690 cu
->method_list
.push_back (mi
);
9693 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9694 "const" / "volatile". If so, decrements LEN by the length of the
9695 modifier and return true. Otherwise return false. */
9699 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9701 size_t mod_len
= sizeof (mod
) - 1;
9702 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9710 /* Compute the physnames of any methods on the CU's method list.
9712 The computation of method physnames is delayed in order to avoid the
9713 (bad) condition that one of the method's formal parameters is of an as yet
9717 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9719 /* Only C++ delays computing physnames. */
9720 if (cu
->method_list
.empty ())
9722 gdb_assert (cu
->language
== language_cplus
);
9724 for (const delayed_method_info
&mi
: cu
->method_list
)
9726 const char *physname
;
9727 struct fn_fieldlist
*fn_flp
9728 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9729 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9730 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9731 = physname
? physname
: "";
9733 /* Since there's no tag to indicate whether a method is a
9734 const/volatile overload, extract that information out of the
9736 if (physname
!= NULL
)
9738 size_t len
= strlen (physname
);
9742 if (physname
[len
] == ')') /* shortcut */
9744 else if (check_modifier (physname
, len
, " const"))
9745 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9746 else if (check_modifier (physname
, len
, " volatile"))
9747 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9754 /* The list is no longer needed. */
9755 cu
->method_list
.clear ();
9758 /* Go objects should be embedded in a DW_TAG_module DIE,
9759 and it's not clear if/how imported objects will appear.
9760 To keep Go support simple until that's worked out,
9761 go back through what we've read and create something usable.
9762 We could do this while processing each DIE, and feels kinda cleaner,
9763 but that way is more invasive.
9764 This is to, for example, allow the user to type "p var" or "b main"
9765 without having to specify the package name, and allow lookups
9766 of module.object to work in contexts that use the expression
9770 fixup_go_packaging (struct dwarf2_cu
*cu
)
9772 char *package_name
= NULL
;
9773 struct pending
*list
;
9776 for (list
= *cu
->get_builder ()->get_global_symbols ();
9780 for (i
= 0; i
< list
->nsyms
; ++i
)
9782 struct symbol
*sym
= list
->symbol
[i
];
9784 if (SYMBOL_LANGUAGE (sym
) == language_go
9785 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9787 char *this_package_name
= go_symbol_package_name (sym
);
9789 if (this_package_name
== NULL
)
9791 if (package_name
== NULL
)
9792 package_name
= this_package_name
;
9795 struct objfile
*objfile
9796 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9797 if (strcmp (package_name
, this_package_name
) != 0)
9798 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9799 (symbol_symtab (sym
) != NULL
9800 ? symtab_to_filename_for_display
9801 (symbol_symtab (sym
))
9802 : objfile_name (objfile
)),
9803 this_package_name
, package_name
);
9804 xfree (this_package_name
);
9810 if (package_name
!= NULL
)
9812 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9813 const char *saved_package_name
9814 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
, package_name
);
9815 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9816 saved_package_name
);
9819 sym
= allocate_symbol (objfile
);
9820 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9821 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9822 strlen (saved_package_name
), 0, objfile
);
9823 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9824 e.g., "main" finds the "main" module and not C's main(). */
9825 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9826 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9827 SYMBOL_TYPE (sym
) = type
;
9829 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9831 xfree (package_name
);
9835 /* Allocate a fully-qualified name consisting of the two parts on the
9839 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9841 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9844 /* A helper that allocates a struct discriminant_info to attach to a
9847 static struct discriminant_info
*
9848 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9851 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9852 gdb_assert (discriminant_index
== -1
9853 || (discriminant_index
>= 0
9854 && discriminant_index
< TYPE_NFIELDS (type
)));
9855 gdb_assert (default_index
== -1
9856 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9858 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9860 struct discriminant_info
*disc
9861 = ((struct discriminant_info
*)
9863 offsetof (struct discriminant_info
, discriminants
)
9864 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9865 disc
->default_index
= default_index
;
9866 disc
->discriminant_index
= discriminant_index
;
9868 struct dynamic_prop prop
;
9869 prop
.kind
= PROP_UNDEFINED
;
9870 prop
.data
.baton
= disc
;
9872 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9877 /* Some versions of rustc emitted enums in an unusual way.
9879 Ordinary enums were emitted as unions. The first element of each
9880 structure in the union was named "RUST$ENUM$DISR". This element
9881 held the discriminant.
9883 These versions of Rust also implemented the "non-zero"
9884 optimization. When the enum had two values, and one is empty and
9885 the other holds a pointer that cannot be zero, the pointer is used
9886 as the discriminant, with a zero value meaning the empty variant.
9887 Here, the union's first member is of the form
9888 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9889 where the fieldnos are the indices of the fields that should be
9890 traversed in order to find the field (which may be several fields deep)
9891 and the variantname is the name of the variant of the case when the
9894 This function recognizes whether TYPE is of one of these forms,
9895 and, if so, smashes it to be a variant type. */
9898 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9900 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9902 /* We don't need to deal with empty enums. */
9903 if (TYPE_NFIELDS (type
) == 0)
9906 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9907 if (TYPE_NFIELDS (type
) == 1
9908 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9910 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9912 /* Decode the field name to find the offset of the
9914 ULONGEST bit_offset
= 0;
9915 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9916 while (name
[0] >= '0' && name
[0] <= '9')
9919 unsigned long index
= strtoul (name
, &tail
, 10);
9922 || index
>= TYPE_NFIELDS (field_type
)
9923 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9924 != FIELD_LOC_KIND_BITPOS
))
9926 complaint (_("Could not parse Rust enum encoding string \"%s\""
9928 TYPE_FIELD_NAME (type
, 0),
9929 objfile_name (objfile
));
9934 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9935 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9938 /* Make a union to hold the variants. */
9939 struct type
*union_type
= alloc_type (objfile
);
9940 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9941 TYPE_NFIELDS (union_type
) = 3;
9942 TYPE_FIELDS (union_type
)
9943 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9944 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9945 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9947 /* Put the discriminant must at index 0. */
9948 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
9949 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9950 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9951 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
9953 /* The order of fields doesn't really matter, so put the real
9954 field at index 1 and the data-less field at index 2. */
9955 struct discriminant_info
*disc
9956 = alloc_discriminant_info (union_type
, 0, 1);
9957 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
9958 TYPE_FIELD_NAME (union_type
, 1)
9959 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
9960 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
9961 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9962 TYPE_FIELD_NAME (union_type
, 1));
9964 const char *dataless_name
9965 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9967 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9969 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
9970 /* NAME points into the original discriminant name, which
9971 already has the correct lifetime. */
9972 TYPE_FIELD_NAME (union_type
, 2) = name
;
9973 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
9974 disc
->discriminants
[2] = 0;
9976 /* Smash this type to be a structure type. We have to do this
9977 because the type has already been recorded. */
9978 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9979 TYPE_NFIELDS (type
) = 1;
9981 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
9983 /* Install the variant part. */
9984 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9985 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9986 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9988 else if (TYPE_NFIELDS (type
) == 1)
9990 /* We assume that a union with a single field is a univariant
9992 /* Smash this type to be a structure type. We have to do this
9993 because the type has already been recorded. */
9994 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9996 /* Make a union to hold the variants. */
9997 struct type
*union_type
= alloc_type (objfile
);
9998 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9999 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
10000 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10001 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10002 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
10004 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
10005 const char *variant_name
10006 = rust_last_path_segment (TYPE_NAME (field_type
));
10007 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
10008 TYPE_NAME (field_type
)
10009 = rust_fully_qualify (&objfile
->objfile_obstack
,
10010 TYPE_NAME (type
), variant_name
);
10012 /* Install the union in the outer struct type. */
10013 TYPE_NFIELDS (type
) = 1;
10015 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
10016 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10017 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10018 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10020 alloc_discriminant_info (union_type
, -1, 0);
10024 struct type
*disr_type
= nullptr;
10025 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
10027 disr_type
= TYPE_FIELD_TYPE (type
, i
);
10029 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
10031 /* All fields of a true enum will be structs. */
10034 else if (TYPE_NFIELDS (disr_type
) == 0)
10036 /* Could be data-less variant, so keep going. */
10037 disr_type
= nullptr;
10039 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
10040 "RUST$ENUM$DISR") != 0)
10042 /* Not a Rust enum. */
10052 /* If we got here without a discriminant, then it's probably
10054 if (disr_type
== nullptr)
10057 /* Smash this type to be a structure type. We have to do this
10058 because the type has already been recorded. */
10059 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10061 /* Make a union to hold the variants. */
10062 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10063 struct type
*union_type
= alloc_type (objfile
);
10064 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10065 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10066 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10067 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10068 TYPE_FIELDS (union_type
)
10069 = (struct field
*) TYPE_ZALLOC (union_type
,
10070 (TYPE_NFIELDS (union_type
)
10071 * sizeof (struct field
)));
10073 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10074 TYPE_NFIELDS (type
) * sizeof (struct field
));
10076 /* Install the discriminant at index 0 in the union. */
10077 TYPE_FIELD (union_type
, 0) = *disr_field
;
10078 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10079 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10081 /* Install the union in the outer struct type. */
10082 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10083 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10084 TYPE_NFIELDS (type
) = 1;
10086 /* Set the size and offset of the union type. */
10087 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10089 /* We need a way to find the correct discriminant given a
10090 variant name. For convenience we build a map here. */
10091 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10092 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10093 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10095 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10098 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10099 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10103 int n_fields
= TYPE_NFIELDS (union_type
);
10104 struct discriminant_info
*disc
10105 = alloc_discriminant_info (union_type
, 0, -1);
10106 /* Skip the discriminant here. */
10107 for (int i
= 1; i
< n_fields
; ++i
)
10109 /* Find the final word in the name of this variant's type.
10110 That name can be used to look up the correct
10112 const char *variant_name
10113 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10116 auto iter
= discriminant_map
.find (variant_name
);
10117 if (iter
!= discriminant_map
.end ())
10118 disc
->discriminants
[i
] = iter
->second
;
10120 /* Remove the discriminant field, if it exists. */
10121 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10122 if (TYPE_NFIELDS (sub_type
) > 0)
10124 --TYPE_NFIELDS (sub_type
);
10125 ++TYPE_FIELDS (sub_type
);
10127 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10128 TYPE_NAME (sub_type
)
10129 = rust_fully_qualify (&objfile
->objfile_obstack
,
10130 TYPE_NAME (type
), variant_name
);
10135 /* Rewrite some Rust unions to be structures with variants parts. */
10138 rust_union_quirks (struct dwarf2_cu
*cu
)
10140 gdb_assert (cu
->language
== language_rust
);
10141 for (type
*type_
: cu
->rust_unions
)
10142 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10143 /* We don't need this any more. */
10144 cu
->rust_unions
.clear ();
10147 /* Return the symtab for PER_CU. This works properly regardless of
10148 whether we're using the index or psymtabs. */
10150 static struct compunit_symtab
*
10151 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10153 return (per_cu
->dwarf2_per_objfile
->using_index
10154 ? per_cu
->v
.quick
->compunit_symtab
10155 : per_cu
->v
.psymtab
->compunit_symtab
);
10158 /* A helper function for computing the list of all symbol tables
10159 included by PER_CU. */
10162 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
10163 htab_t all_children
, htab_t all_type_symtabs
,
10164 struct dwarf2_per_cu_data
*per_cu
,
10165 struct compunit_symtab
*immediate_parent
)
10169 struct compunit_symtab
*cust
;
10170 struct dwarf2_per_cu_data
*iter
;
10172 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10175 /* This inclusion and its children have been processed. */
10180 /* Only add a CU if it has a symbol table. */
10181 cust
= get_compunit_symtab (per_cu
);
10184 /* If this is a type unit only add its symbol table if we haven't
10185 seen it yet (type unit per_cu's can share symtabs). */
10186 if (per_cu
->is_debug_types
)
10188 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10192 result
->push_back (cust
);
10193 if (cust
->user
== NULL
)
10194 cust
->user
= immediate_parent
;
10199 result
->push_back (cust
);
10200 if (cust
->user
== NULL
)
10201 cust
->user
= immediate_parent
;
10206 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10209 recursively_compute_inclusions (result
, all_children
,
10210 all_type_symtabs
, iter
, cust
);
10214 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10218 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10220 gdb_assert (! per_cu
->is_debug_types
);
10222 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10225 struct dwarf2_per_cu_data
*per_cu_iter
;
10226 std::vector
<compunit_symtab
*> result_symtabs
;
10227 htab_t all_children
, all_type_symtabs
;
10228 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10230 /* If we don't have a symtab, we can just skip this case. */
10234 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10235 NULL
, xcalloc
, xfree
);
10236 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10237 NULL
, xcalloc
, xfree
);
10240 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10244 recursively_compute_inclusions (&result_symtabs
, all_children
,
10245 all_type_symtabs
, per_cu_iter
,
10249 /* Now we have a transitive closure of all the included symtabs. */
10250 len
= result_symtabs
.size ();
10252 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10253 struct compunit_symtab
*, len
+ 1);
10254 memcpy (cust
->includes
, result_symtabs
.data (),
10255 len
* sizeof (compunit_symtab
*));
10256 cust
->includes
[len
] = NULL
;
10258 htab_delete (all_children
);
10259 htab_delete (all_type_symtabs
);
10263 /* Compute the 'includes' field for the symtabs of all the CUs we just
10267 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10269 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
10271 if (! iter
->is_debug_types
)
10272 compute_compunit_symtab_includes (iter
);
10275 dwarf2_per_objfile
->just_read_cus
.clear ();
10278 /* Generate full symbol information for PER_CU, whose DIEs have
10279 already been loaded into memory. */
10282 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10283 enum language pretend_language
)
10285 struct dwarf2_cu
*cu
= per_cu
->cu
;
10286 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10287 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10288 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10289 CORE_ADDR lowpc
, highpc
;
10290 struct compunit_symtab
*cust
;
10291 CORE_ADDR baseaddr
;
10292 struct block
*static_block
;
10295 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10297 /* Clear the list here in case something was left over. */
10298 cu
->method_list
.clear ();
10300 cu
->language
= pretend_language
;
10301 cu
->language_defn
= language_def (cu
->language
);
10303 /* Do line number decoding in read_file_scope () */
10304 process_die (cu
->dies
, cu
);
10306 /* For now fudge the Go package. */
10307 if (cu
->language
== language_go
)
10308 fixup_go_packaging (cu
);
10310 /* Now that we have processed all the DIEs in the CU, all the types
10311 should be complete, and it should now be safe to compute all of the
10313 compute_delayed_physnames (cu
);
10315 if (cu
->language
== language_rust
)
10316 rust_union_quirks (cu
);
10318 /* Some compilers don't define a DW_AT_high_pc attribute for the
10319 compilation unit. If the DW_AT_high_pc is missing, synthesize
10320 it, by scanning the DIE's below the compilation unit. */
10321 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10323 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10324 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
10326 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10327 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10328 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10329 addrmap to help ensure it has an accurate map of pc values belonging to
10331 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10333 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
10334 SECT_OFF_TEXT (objfile
),
10339 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10341 /* Set symtab language to language from DW_AT_language. If the
10342 compilation is from a C file generated by language preprocessors, do
10343 not set the language if it was already deduced by start_subfile. */
10344 if (!(cu
->language
== language_c
10345 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10346 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10348 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10349 produce DW_AT_location with location lists but it can be possibly
10350 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10351 there were bugs in prologue debug info, fixed later in GCC-4.5
10352 by "unwind info for epilogues" patch (which is not directly related).
10354 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10355 needed, it would be wrong due to missing DW_AT_producer there.
10357 Still one can confuse GDB by using non-standard GCC compilation
10358 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10360 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10361 cust
->locations_valid
= 1;
10363 if (gcc_4_minor
>= 5)
10364 cust
->epilogue_unwind_valid
= 1;
10366 cust
->call_site_htab
= cu
->call_site_htab
;
10369 if (dwarf2_per_objfile
->using_index
)
10370 per_cu
->v
.quick
->compunit_symtab
= cust
;
10373 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10374 pst
->compunit_symtab
= cust
;
10378 /* Push it for inclusion processing later. */
10379 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
10381 /* Not needed any more. */
10382 cu
->reset_builder ();
10385 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10386 already been loaded into memory. */
10389 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10390 enum language pretend_language
)
10392 struct dwarf2_cu
*cu
= per_cu
->cu
;
10393 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10394 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10395 struct compunit_symtab
*cust
;
10396 struct signatured_type
*sig_type
;
10398 gdb_assert (per_cu
->is_debug_types
);
10399 sig_type
= (struct signatured_type
*) per_cu
;
10401 /* Clear the list here in case something was left over. */
10402 cu
->method_list
.clear ();
10404 cu
->language
= pretend_language
;
10405 cu
->language_defn
= language_def (cu
->language
);
10407 /* The symbol tables are set up in read_type_unit_scope. */
10408 process_die (cu
->dies
, cu
);
10410 /* For now fudge the Go package. */
10411 if (cu
->language
== language_go
)
10412 fixup_go_packaging (cu
);
10414 /* Now that we have processed all the DIEs in the CU, all the types
10415 should be complete, and it should now be safe to compute all of the
10417 compute_delayed_physnames (cu
);
10419 if (cu
->language
== language_rust
)
10420 rust_union_quirks (cu
);
10422 /* TUs share symbol tables.
10423 If this is the first TU to use this symtab, complete the construction
10424 of it with end_expandable_symtab. Otherwise, complete the addition of
10425 this TU's symbols to the existing symtab. */
10426 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10428 buildsym_compunit
*builder
= cu
->get_builder ();
10429 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10430 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10434 /* Set symtab language to language from DW_AT_language. If the
10435 compilation is from a C file generated by language preprocessors,
10436 do not set the language if it was already deduced by
10438 if (!(cu
->language
== language_c
10439 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10440 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10445 cu
->get_builder ()->augment_type_symtab ();
10446 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10449 if (dwarf2_per_objfile
->using_index
)
10450 per_cu
->v
.quick
->compunit_symtab
= cust
;
10453 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10454 pst
->compunit_symtab
= cust
;
10458 /* Not needed any more. */
10459 cu
->reset_builder ();
10462 /* Process an imported unit DIE. */
10465 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10467 struct attribute
*attr
;
10469 /* For now we don't handle imported units in type units. */
10470 if (cu
->per_cu
->is_debug_types
)
10472 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10473 " supported in type units [in module %s]"),
10474 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10477 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10480 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10481 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10482 dwarf2_per_cu_data
*per_cu
10483 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10484 cu
->per_cu
->dwarf2_per_objfile
);
10486 /* If necessary, add it to the queue and load its DIEs. */
10487 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10488 load_full_comp_unit (per_cu
, false, cu
->language
);
10490 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10495 /* RAII object that represents a process_die scope: i.e.,
10496 starts/finishes processing a DIE. */
10497 class process_die_scope
10500 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10501 : m_die (die
), m_cu (cu
)
10503 /* We should only be processing DIEs not already in process. */
10504 gdb_assert (!m_die
->in_process
);
10505 m_die
->in_process
= true;
10508 ~process_die_scope ()
10510 m_die
->in_process
= false;
10512 /* If we're done processing the DIE for the CU that owns the line
10513 header, we don't need the line header anymore. */
10514 if (m_cu
->line_header_die_owner
== m_die
)
10516 delete m_cu
->line_header
;
10517 m_cu
->line_header
= NULL
;
10518 m_cu
->line_header_die_owner
= NULL
;
10527 /* Process a die and its children. */
10530 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10532 process_die_scope
scope (die
, cu
);
10536 case DW_TAG_padding
:
10538 case DW_TAG_compile_unit
:
10539 case DW_TAG_partial_unit
:
10540 read_file_scope (die
, cu
);
10542 case DW_TAG_type_unit
:
10543 read_type_unit_scope (die
, cu
);
10545 case DW_TAG_subprogram
:
10546 case DW_TAG_inlined_subroutine
:
10547 read_func_scope (die
, cu
);
10549 case DW_TAG_lexical_block
:
10550 case DW_TAG_try_block
:
10551 case DW_TAG_catch_block
:
10552 read_lexical_block_scope (die
, cu
);
10554 case DW_TAG_call_site
:
10555 case DW_TAG_GNU_call_site
:
10556 read_call_site_scope (die
, cu
);
10558 case DW_TAG_class_type
:
10559 case DW_TAG_interface_type
:
10560 case DW_TAG_structure_type
:
10561 case DW_TAG_union_type
:
10562 process_structure_scope (die
, cu
);
10564 case DW_TAG_enumeration_type
:
10565 process_enumeration_scope (die
, cu
);
10568 /* These dies have a type, but processing them does not create
10569 a symbol or recurse to process the children. Therefore we can
10570 read them on-demand through read_type_die. */
10571 case DW_TAG_subroutine_type
:
10572 case DW_TAG_set_type
:
10573 case DW_TAG_array_type
:
10574 case DW_TAG_pointer_type
:
10575 case DW_TAG_ptr_to_member_type
:
10576 case DW_TAG_reference_type
:
10577 case DW_TAG_rvalue_reference_type
:
10578 case DW_TAG_string_type
:
10581 case DW_TAG_base_type
:
10582 case DW_TAG_subrange_type
:
10583 case DW_TAG_typedef
:
10584 /* Add a typedef symbol for the type definition, if it has a
10586 new_symbol (die
, read_type_die (die
, cu
), cu
);
10588 case DW_TAG_common_block
:
10589 read_common_block (die
, cu
);
10591 case DW_TAG_common_inclusion
:
10593 case DW_TAG_namespace
:
10594 cu
->processing_has_namespace_info
= true;
10595 read_namespace (die
, cu
);
10597 case DW_TAG_module
:
10598 cu
->processing_has_namespace_info
= true;
10599 read_module (die
, cu
);
10601 case DW_TAG_imported_declaration
:
10602 cu
->processing_has_namespace_info
= true;
10603 if (read_namespace_alias (die
, cu
))
10605 /* The declaration is not a global namespace alias. */
10606 /* Fall through. */
10607 case DW_TAG_imported_module
:
10608 cu
->processing_has_namespace_info
= true;
10609 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10610 || cu
->language
!= language_fortran
))
10611 complaint (_("Tag '%s' has unexpected children"),
10612 dwarf_tag_name (die
->tag
));
10613 read_import_statement (die
, cu
);
10616 case DW_TAG_imported_unit
:
10617 process_imported_unit_die (die
, cu
);
10620 case DW_TAG_variable
:
10621 read_variable (die
, cu
);
10625 new_symbol (die
, NULL
, cu
);
10630 /* DWARF name computation. */
10632 /* A helper function for dwarf2_compute_name which determines whether DIE
10633 needs to have the name of the scope prepended to the name listed in the
10637 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10639 struct attribute
*attr
;
10643 case DW_TAG_namespace
:
10644 case DW_TAG_typedef
:
10645 case DW_TAG_class_type
:
10646 case DW_TAG_interface_type
:
10647 case DW_TAG_structure_type
:
10648 case DW_TAG_union_type
:
10649 case DW_TAG_enumeration_type
:
10650 case DW_TAG_enumerator
:
10651 case DW_TAG_subprogram
:
10652 case DW_TAG_inlined_subroutine
:
10653 case DW_TAG_member
:
10654 case DW_TAG_imported_declaration
:
10657 case DW_TAG_variable
:
10658 case DW_TAG_constant
:
10659 /* We only need to prefix "globally" visible variables. These include
10660 any variable marked with DW_AT_external or any variable that
10661 lives in a namespace. [Variables in anonymous namespaces
10662 require prefixing, but they are not DW_AT_external.] */
10664 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10666 struct dwarf2_cu
*spec_cu
= cu
;
10668 return die_needs_namespace (die_specification (die
, &spec_cu
),
10672 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10673 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10674 && die
->parent
->tag
!= DW_TAG_module
)
10676 /* A variable in a lexical block of some kind does not need a
10677 namespace, even though in C++ such variables may be external
10678 and have a mangled name. */
10679 if (die
->parent
->tag
== DW_TAG_lexical_block
10680 || die
->parent
->tag
== DW_TAG_try_block
10681 || die
->parent
->tag
== DW_TAG_catch_block
10682 || die
->parent
->tag
== DW_TAG_subprogram
)
10691 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10692 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10693 defined for the given DIE. */
10695 static struct attribute
*
10696 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10698 struct attribute
*attr
;
10700 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10702 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10707 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10708 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10709 defined for the given DIE. */
10711 static const char *
10712 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10714 const char *linkage_name
;
10716 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10717 if (linkage_name
== NULL
)
10718 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10720 return linkage_name
;
10723 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10724 compute the physname for the object, which include a method's:
10725 - formal parameters (C++),
10726 - receiver type (Go),
10728 The term "physname" is a bit confusing.
10729 For C++, for example, it is the demangled name.
10730 For Go, for example, it's the mangled name.
10732 For Ada, return the DIE's linkage name rather than the fully qualified
10733 name. PHYSNAME is ignored..
10735 The result is allocated on the objfile_obstack and canonicalized. */
10737 static const char *
10738 dwarf2_compute_name (const char *name
,
10739 struct die_info
*die
, struct dwarf2_cu
*cu
,
10742 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10745 name
= dwarf2_name (die
, cu
);
10747 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10748 but otherwise compute it by typename_concat inside GDB.
10749 FIXME: Actually this is not really true, or at least not always true.
10750 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10751 Fortran names because there is no mangling standard. So new_symbol
10752 will set the demangled name to the result of dwarf2_full_name, and it is
10753 the demangled name that GDB uses if it exists. */
10754 if (cu
->language
== language_ada
10755 || (cu
->language
== language_fortran
&& physname
))
10757 /* For Ada unit, we prefer the linkage name over the name, as
10758 the former contains the exported name, which the user expects
10759 to be able to reference. Ideally, we want the user to be able
10760 to reference this entity using either natural or linkage name,
10761 but we haven't started looking at this enhancement yet. */
10762 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10764 if (linkage_name
!= NULL
)
10765 return linkage_name
;
10768 /* These are the only languages we know how to qualify names in. */
10770 && (cu
->language
== language_cplus
10771 || cu
->language
== language_fortran
|| cu
->language
== language_d
10772 || cu
->language
== language_rust
))
10774 if (die_needs_namespace (die
, cu
))
10776 const char *prefix
;
10777 const char *canonical_name
= NULL
;
10781 prefix
= determine_prefix (die
, cu
);
10782 if (*prefix
!= '\0')
10784 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10787 buf
.puts (prefixed_name
);
10788 xfree (prefixed_name
);
10793 /* Template parameters may be specified in the DIE's DW_AT_name, or
10794 as children with DW_TAG_template_type_param or
10795 DW_TAG_value_type_param. If the latter, add them to the name
10796 here. If the name already has template parameters, then
10797 skip this step; some versions of GCC emit both, and
10798 it is more efficient to use the pre-computed name.
10800 Something to keep in mind about this process: it is very
10801 unlikely, or in some cases downright impossible, to produce
10802 something that will match the mangled name of a function.
10803 If the definition of the function has the same debug info,
10804 we should be able to match up with it anyway. But fallbacks
10805 using the minimal symbol, for instance to find a method
10806 implemented in a stripped copy of libstdc++, will not work.
10807 If we do not have debug info for the definition, we will have to
10808 match them up some other way.
10810 When we do name matching there is a related problem with function
10811 templates; two instantiated function templates are allowed to
10812 differ only by their return types, which we do not add here. */
10814 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10816 struct attribute
*attr
;
10817 struct die_info
*child
;
10820 die
->building_fullname
= 1;
10822 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10826 const gdb_byte
*bytes
;
10827 struct dwarf2_locexpr_baton
*baton
;
10830 if (child
->tag
!= DW_TAG_template_type_param
10831 && child
->tag
!= DW_TAG_template_value_param
)
10842 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10845 complaint (_("template parameter missing DW_AT_type"));
10846 buf
.puts ("UNKNOWN_TYPE");
10849 type
= die_type (child
, cu
);
10851 if (child
->tag
== DW_TAG_template_type_param
)
10853 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10854 &type_print_raw_options
);
10858 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10861 complaint (_("template parameter missing "
10862 "DW_AT_const_value"));
10863 buf
.puts ("UNKNOWN_VALUE");
10867 dwarf2_const_value_attr (attr
, type
, name
,
10868 &cu
->comp_unit_obstack
, cu
,
10869 &value
, &bytes
, &baton
);
10871 if (TYPE_NOSIGN (type
))
10872 /* GDB prints characters as NUMBER 'CHAR'. If that's
10873 changed, this can use value_print instead. */
10874 c_printchar (value
, type
, &buf
);
10877 struct value_print_options opts
;
10880 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10884 else if (bytes
!= NULL
)
10886 v
= allocate_value (type
);
10887 memcpy (value_contents_writeable (v
), bytes
,
10888 TYPE_LENGTH (type
));
10891 v
= value_from_longest (type
, value
);
10893 /* Specify decimal so that we do not depend on
10895 get_formatted_print_options (&opts
, 'd');
10897 value_print (v
, &buf
, &opts
);
10902 die
->building_fullname
= 0;
10906 /* Close the argument list, with a space if necessary
10907 (nested templates). */
10908 if (!buf
.empty () && buf
.string ().back () == '>')
10915 /* For C++ methods, append formal parameter type
10916 information, if PHYSNAME. */
10918 if (physname
&& die
->tag
== DW_TAG_subprogram
10919 && cu
->language
== language_cplus
)
10921 struct type
*type
= read_type_die (die
, cu
);
10923 c_type_print_args (type
, &buf
, 1, cu
->language
,
10924 &type_print_raw_options
);
10926 if (cu
->language
== language_cplus
)
10928 /* Assume that an artificial first parameter is
10929 "this", but do not crash if it is not. RealView
10930 marks unnamed (and thus unused) parameters as
10931 artificial; there is no way to differentiate
10933 if (TYPE_NFIELDS (type
) > 0
10934 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10935 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10936 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10938 buf
.puts (" const");
10942 const std::string
&intermediate_name
= buf
.string ();
10944 if (cu
->language
== language_cplus
)
10946 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10947 &objfile
->per_bfd
->storage_obstack
);
10949 /* If we only computed INTERMEDIATE_NAME, or if
10950 INTERMEDIATE_NAME is already canonical, then we need to
10951 copy it to the appropriate obstack. */
10952 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10953 name
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
10954 intermediate_name
);
10956 name
= canonical_name
;
10963 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10964 If scope qualifiers are appropriate they will be added. The result
10965 will be allocated on the storage_obstack, or NULL if the DIE does
10966 not have a name. NAME may either be from a previous call to
10967 dwarf2_name or NULL.
10969 The output string will be canonicalized (if C++). */
10971 static const char *
10972 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10974 return dwarf2_compute_name (name
, die
, cu
, 0);
10977 /* Construct a physname for the given DIE in CU. NAME may either be
10978 from a previous call to dwarf2_name or NULL. The result will be
10979 allocated on the objfile_objstack or NULL if the DIE does not have a
10982 The output string will be canonicalized (if C++). */
10984 static const char *
10985 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10987 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10988 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10991 /* In this case dwarf2_compute_name is just a shortcut not building anything
10993 if (!die_needs_namespace (die
, cu
))
10994 return dwarf2_compute_name (name
, die
, cu
, 1);
10996 mangled
= dw2_linkage_name (die
, cu
);
10998 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10999 See https://github.com/rust-lang/rust/issues/32925. */
11000 if (cu
->language
== language_rust
&& mangled
!= NULL
11001 && strchr (mangled
, '{') != NULL
)
11004 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
11006 gdb::unique_xmalloc_ptr
<char> demangled
;
11007 if (mangled
!= NULL
)
11010 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
11012 /* Do nothing (do not demangle the symbol name). */
11014 else if (cu
->language
== language_go
)
11016 /* This is a lie, but we already lie to the caller new_symbol.
11017 new_symbol assumes we return the mangled name.
11018 This just undoes that lie until things are cleaned up. */
11022 /* Use DMGL_RET_DROP for C++ template functions to suppress
11023 their return type. It is easier for GDB users to search
11024 for such functions as `name(params)' than `long name(params)'.
11025 In such case the minimal symbol names do not match the full
11026 symbol names but for template functions there is never a need
11027 to look up their definition from their declaration so
11028 the only disadvantage remains the minimal symbol variant
11029 `long name(params)' does not have the proper inferior type. */
11030 demangled
.reset (gdb_demangle (mangled
,
11031 (DMGL_PARAMS
| DMGL_ANSI
11032 | DMGL_RET_DROP
)));
11035 canon
= demangled
.get ();
11043 if (canon
== NULL
|| check_physname
)
11045 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11047 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11049 /* It may not mean a bug in GDB. The compiler could also
11050 compute DW_AT_linkage_name incorrectly. But in such case
11051 GDB would need to be bug-to-bug compatible. */
11053 complaint (_("Computed physname <%s> does not match demangled <%s> "
11054 "(from linkage <%s>) - DIE at %s [in module %s]"),
11055 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11056 objfile_name (objfile
));
11058 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11059 is available here - over computed PHYSNAME. It is safer
11060 against both buggy GDB and buggy compilers. */
11074 retval
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
, retval
);
11079 /* Inspect DIE in CU for a namespace alias. If one exists, record
11080 a new symbol for it.
11082 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11085 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11087 struct attribute
*attr
;
11089 /* If the die does not have a name, this is not a namespace
11091 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11095 struct die_info
*d
= die
;
11096 struct dwarf2_cu
*imported_cu
= cu
;
11098 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11099 keep inspecting DIEs until we hit the underlying import. */
11100 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11101 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11103 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11107 d
= follow_die_ref (d
, attr
, &imported_cu
);
11108 if (d
->tag
!= DW_TAG_imported_declaration
)
11112 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11114 complaint (_("DIE at %s has too many recursively imported "
11115 "declarations"), sect_offset_str (d
->sect_off
));
11122 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11124 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11125 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11127 /* This declaration is a global namespace alias. Add
11128 a symbol for it whose type is the aliased namespace. */
11129 new_symbol (die
, type
, cu
);
11138 /* Return the using directives repository (global or local?) to use in the
11139 current context for CU.
11141 For Ada, imported declarations can materialize renamings, which *may* be
11142 global. However it is impossible (for now?) in DWARF to distinguish
11143 "external" imported declarations and "static" ones. As all imported
11144 declarations seem to be static in all other languages, make them all CU-wide
11145 global only in Ada. */
11147 static struct using_direct
**
11148 using_directives (struct dwarf2_cu
*cu
)
11150 if (cu
->language
== language_ada
11151 && cu
->get_builder ()->outermost_context_p ())
11152 return cu
->get_builder ()->get_global_using_directives ();
11154 return cu
->get_builder ()->get_local_using_directives ();
11157 /* Read the import statement specified by the given die and record it. */
11160 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11162 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11163 struct attribute
*import_attr
;
11164 struct die_info
*imported_die
, *child_die
;
11165 struct dwarf2_cu
*imported_cu
;
11166 const char *imported_name
;
11167 const char *imported_name_prefix
;
11168 const char *canonical_name
;
11169 const char *import_alias
;
11170 const char *imported_declaration
= NULL
;
11171 const char *import_prefix
;
11172 std::vector
<const char *> excludes
;
11174 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11175 if (import_attr
== NULL
)
11177 complaint (_("Tag '%s' has no DW_AT_import"),
11178 dwarf_tag_name (die
->tag
));
11183 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11184 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11185 if (imported_name
== NULL
)
11187 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11189 The import in the following code:
11203 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11204 <52> DW_AT_decl_file : 1
11205 <53> DW_AT_decl_line : 6
11206 <54> DW_AT_import : <0x75>
11207 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11208 <59> DW_AT_name : B
11209 <5b> DW_AT_decl_file : 1
11210 <5c> DW_AT_decl_line : 2
11211 <5d> DW_AT_type : <0x6e>
11213 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11214 <76> DW_AT_byte_size : 4
11215 <77> DW_AT_encoding : 5 (signed)
11217 imports the wrong die ( 0x75 instead of 0x58 ).
11218 This case will be ignored until the gcc bug is fixed. */
11222 /* Figure out the local name after import. */
11223 import_alias
= dwarf2_name (die
, cu
);
11225 /* Figure out where the statement is being imported to. */
11226 import_prefix
= determine_prefix (die
, cu
);
11228 /* Figure out what the scope of the imported die is and prepend it
11229 to the name of the imported die. */
11230 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11232 if (imported_die
->tag
!= DW_TAG_namespace
11233 && imported_die
->tag
!= DW_TAG_module
)
11235 imported_declaration
= imported_name
;
11236 canonical_name
= imported_name_prefix
;
11238 else if (strlen (imported_name_prefix
) > 0)
11239 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11240 imported_name_prefix
,
11241 (cu
->language
== language_d
? "." : "::"),
11242 imported_name
, (char *) NULL
);
11244 canonical_name
= imported_name
;
11246 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11247 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11248 child_die
= sibling_die (child_die
))
11250 /* DWARF-4: A Fortran use statement with a “rename list” may be
11251 represented by an imported module entry with an import attribute
11252 referring to the module and owned entries corresponding to those
11253 entities that are renamed as part of being imported. */
11255 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11257 complaint (_("child DW_TAG_imported_declaration expected "
11258 "- DIE at %s [in module %s]"),
11259 sect_offset_str (child_die
->sect_off
),
11260 objfile_name (objfile
));
11264 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11265 if (import_attr
== NULL
)
11267 complaint (_("Tag '%s' has no DW_AT_import"),
11268 dwarf_tag_name (child_die
->tag
));
11273 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11275 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11276 if (imported_name
== NULL
)
11278 complaint (_("child DW_TAG_imported_declaration has unknown "
11279 "imported name - DIE at %s [in module %s]"),
11280 sect_offset_str (child_die
->sect_off
),
11281 objfile_name (objfile
));
11285 excludes
.push_back (imported_name
);
11287 process_die (child_die
, cu
);
11290 add_using_directive (using_directives (cu
),
11294 imported_declaration
,
11297 &objfile
->objfile_obstack
);
11300 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11301 types, but gives them a size of zero. Starting with version 14,
11302 ICC is compatible with GCC. */
11305 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11307 if (!cu
->checked_producer
)
11308 check_producer (cu
);
11310 return cu
->producer_is_icc_lt_14
;
11313 /* ICC generates a DW_AT_type for C void functions. This was observed on
11314 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
11315 which says that void functions should not have a DW_AT_type. */
11318 producer_is_icc (struct dwarf2_cu
*cu
)
11320 if (!cu
->checked_producer
)
11321 check_producer (cu
);
11323 return cu
->producer_is_icc
;
11326 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11327 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11328 this, it was first present in GCC release 4.3.0. */
11331 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11333 if (!cu
->checked_producer
)
11334 check_producer (cu
);
11336 return cu
->producer_is_gcc_lt_4_3
;
11339 static file_and_directory
11340 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11342 file_and_directory res
;
11344 /* Find the filename. Do not use dwarf2_name here, since the filename
11345 is not a source language identifier. */
11346 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11347 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11349 if (res
.comp_dir
== NULL
11350 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11351 && IS_ABSOLUTE_PATH (res
.name
))
11353 res
.comp_dir_storage
= ldirname (res
.name
);
11354 if (!res
.comp_dir_storage
.empty ())
11355 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11357 if (res
.comp_dir
!= NULL
)
11359 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11360 directory, get rid of it. */
11361 const char *cp
= strchr (res
.comp_dir
, ':');
11363 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11364 res
.comp_dir
= cp
+ 1;
11367 if (res
.name
== NULL
)
11368 res
.name
= "<unknown>";
11373 /* Handle DW_AT_stmt_list for a compilation unit.
11374 DIE is the DW_TAG_compile_unit die for CU.
11375 COMP_DIR is the compilation directory. LOWPC is passed to
11376 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11379 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11380 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11382 struct dwarf2_per_objfile
*dwarf2_per_objfile
11383 = cu
->per_cu
->dwarf2_per_objfile
;
11384 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11385 struct attribute
*attr
;
11386 struct line_header line_header_local
;
11387 hashval_t line_header_local_hash
;
11389 int decode_mapping
;
11391 gdb_assert (! cu
->per_cu
->is_debug_types
);
11393 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11397 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11399 /* The line header hash table is only created if needed (it exists to
11400 prevent redundant reading of the line table for partial_units).
11401 If we're given a partial_unit, we'll need it. If we're given a
11402 compile_unit, then use the line header hash table if it's already
11403 created, but don't create one just yet. */
11405 if (dwarf2_per_objfile
->line_header_hash
== NULL
11406 && die
->tag
== DW_TAG_partial_unit
)
11408 dwarf2_per_objfile
->line_header_hash
11409 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11410 line_header_eq_voidp
,
11411 free_line_header_voidp
,
11412 &objfile
->objfile_obstack
,
11413 hashtab_obstack_allocate
,
11414 dummy_obstack_deallocate
);
11417 line_header_local
.sect_off
= line_offset
;
11418 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11419 line_header_local_hash
= line_header_hash (&line_header_local
);
11420 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11422 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11423 &line_header_local
,
11424 line_header_local_hash
, NO_INSERT
);
11426 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11427 is not present in *SLOT (since if there is something in *SLOT then
11428 it will be for a partial_unit). */
11429 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11431 gdb_assert (*slot
!= NULL
);
11432 cu
->line_header
= (struct line_header
*) *slot
;
11437 /* dwarf_decode_line_header does not yet provide sufficient information.
11438 We always have to call also dwarf_decode_lines for it. */
11439 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11443 cu
->line_header
= lh
.release ();
11444 cu
->line_header_die_owner
= die
;
11446 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11450 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11451 &line_header_local
,
11452 line_header_local_hash
, INSERT
);
11453 gdb_assert (slot
!= NULL
);
11455 if (slot
!= NULL
&& *slot
== NULL
)
11457 /* This newly decoded line number information unit will be owned
11458 by line_header_hash hash table. */
11459 *slot
= cu
->line_header
;
11460 cu
->line_header_die_owner
= NULL
;
11464 /* We cannot free any current entry in (*slot) as that struct line_header
11465 may be already used by multiple CUs. Create only temporary decoded
11466 line_header for this CU - it may happen at most once for each line
11467 number information unit. And if we're not using line_header_hash
11468 then this is what we want as well. */
11469 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11471 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11472 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11477 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11480 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11482 struct dwarf2_per_objfile
*dwarf2_per_objfile
11483 = cu
->per_cu
->dwarf2_per_objfile
;
11484 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11485 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11486 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11487 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11488 struct attribute
*attr
;
11489 struct die_info
*child_die
;
11490 CORE_ADDR baseaddr
;
11492 prepare_one_comp_unit (cu
, die
, cu
->language
);
11493 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11495 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11497 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11498 from finish_block. */
11499 if (lowpc
== ((CORE_ADDR
) -1))
11501 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11503 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11505 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11506 standardised yet. As a workaround for the language detection we fall
11507 back to the DW_AT_producer string. */
11508 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11509 cu
->language
= language_opencl
;
11511 /* Similar hack for Go. */
11512 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11513 set_cu_language (DW_LANG_Go
, cu
);
11515 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
11517 /* Decode line number information if present. We do this before
11518 processing child DIEs, so that the line header table is available
11519 for DW_AT_decl_file. */
11520 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11522 /* Process all dies in compilation unit. */
11523 if (die
->child
!= NULL
)
11525 child_die
= die
->child
;
11526 while (child_die
&& child_die
->tag
)
11528 process_die (child_die
, cu
);
11529 child_die
= sibling_die (child_die
);
11533 /* Decode macro information, if present. Dwarf 2 macro information
11534 refers to information in the line number info statement program
11535 header, so we can only read it if we've read the header
11537 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11539 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11540 if (attr
&& cu
->line_header
)
11542 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11543 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11545 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11549 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11550 if (attr
&& cu
->line_header
)
11552 unsigned int macro_offset
= DW_UNSND (attr
);
11554 dwarf_decode_macros (cu
, macro_offset
, 0);
11560 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11562 struct type_unit_group
*tu_group
;
11564 struct attribute
*attr
;
11566 struct signatured_type
*sig_type
;
11568 gdb_assert (per_cu
->is_debug_types
);
11569 sig_type
= (struct signatured_type
*) per_cu
;
11571 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11573 /* If we're using .gdb_index (includes -readnow) then
11574 per_cu->type_unit_group may not have been set up yet. */
11575 if (sig_type
->type_unit_group
== NULL
)
11576 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11577 tu_group
= sig_type
->type_unit_group
;
11579 /* If we've already processed this stmt_list there's no real need to
11580 do it again, we could fake it and just recreate the part we need
11581 (file name,index -> symtab mapping). If data shows this optimization
11582 is useful we can do it then. */
11583 first_time
= tu_group
->compunit_symtab
== NULL
;
11585 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11590 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11591 lh
= dwarf_decode_line_header (line_offset
, this);
11596 start_symtab ("", NULL
, 0);
11599 gdb_assert (tu_group
->symtabs
== NULL
);
11600 gdb_assert (m_builder
== nullptr);
11601 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11602 m_builder
.reset (new struct buildsym_compunit
11603 (COMPUNIT_OBJFILE (cust
), "",
11604 COMPUNIT_DIRNAME (cust
),
11605 compunit_language (cust
),
11611 line_header
= lh
.release ();
11612 line_header_die_owner
= die
;
11616 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11618 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11619 still initializing it, and our caller (a few levels up)
11620 process_full_type_unit still needs to know if this is the first
11623 tu_group
->num_symtabs
= line_header
->file_names
.size ();
11624 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11625 line_header
->file_names
.size ());
11627 for (i
= 0; i
< line_header
->file_names
.size (); ++i
)
11629 file_entry
&fe
= line_header
->file_names
[i
];
11631 dwarf2_start_subfile (this, fe
.name
,
11632 fe
.include_dir (line_header
));
11633 buildsym_compunit
*b
= get_builder ();
11634 if (b
->get_current_subfile ()->symtab
== NULL
)
11636 /* NOTE: start_subfile will recognize when it's been
11637 passed a file it has already seen. So we can't
11638 assume there's a simple mapping from
11639 cu->line_header->file_names to subfiles, plus
11640 cu->line_header->file_names may contain dups. */
11641 b
->get_current_subfile ()->symtab
11642 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11645 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11646 tu_group
->symtabs
[i
] = fe
.symtab
;
11651 gdb_assert (m_builder
== nullptr);
11652 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11653 m_builder
.reset (new struct buildsym_compunit
11654 (COMPUNIT_OBJFILE (cust
), "",
11655 COMPUNIT_DIRNAME (cust
),
11656 compunit_language (cust
),
11659 for (i
= 0; i
< line_header
->file_names
.size (); ++i
)
11661 file_entry
&fe
= line_header
->file_names
[i
];
11663 fe
.symtab
= tu_group
->symtabs
[i
];
11667 /* The main symtab is allocated last. Type units don't have DW_AT_name
11668 so they don't have a "real" (so to speak) symtab anyway.
11669 There is later code that will assign the main symtab to all symbols
11670 that don't have one. We need to handle the case of a symbol with a
11671 missing symtab (DW_AT_decl_file) anyway. */
11674 /* Process DW_TAG_type_unit.
11675 For TUs we want to skip the first top level sibling if it's not the
11676 actual type being defined by this TU. In this case the first top
11677 level sibling is there to provide context only. */
11680 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11682 struct die_info
*child_die
;
11684 prepare_one_comp_unit (cu
, die
, language_minimal
);
11686 /* Initialize (or reinitialize) the machinery for building symtabs.
11687 We do this before processing child DIEs, so that the line header table
11688 is available for DW_AT_decl_file. */
11689 cu
->setup_type_unit_groups (die
);
11691 if (die
->child
!= NULL
)
11693 child_die
= die
->child
;
11694 while (child_die
&& child_die
->tag
)
11696 process_die (child_die
, cu
);
11697 child_die
= sibling_die (child_die
);
11704 http://gcc.gnu.org/wiki/DebugFission
11705 http://gcc.gnu.org/wiki/DebugFissionDWP
11707 To simplify handling of both DWO files ("object" files with the DWARF info)
11708 and DWP files (a file with the DWOs packaged up into one file), we treat
11709 DWP files as having a collection of virtual DWO files. */
11712 hash_dwo_file (const void *item
)
11714 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11717 hash
= htab_hash_string (dwo_file
->dwo_name
);
11718 if (dwo_file
->comp_dir
!= NULL
)
11719 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11724 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11726 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11727 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11729 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11731 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11732 return lhs
->comp_dir
== rhs
->comp_dir
;
11733 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11736 /* Allocate a hash table for DWO files. */
11739 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11741 auto delete_dwo_file
= [] (void *item
)
11743 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11748 return htab_up (htab_create_alloc_ex (41,
11752 &objfile
->objfile_obstack
,
11753 hashtab_obstack_allocate
,
11754 dummy_obstack_deallocate
));
11757 /* Lookup DWO file DWO_NAME. */
11760 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11761 const char *dwo_name
,
11762 const char *comp_dir
)
11764 struct dwo_file find_entry
;
11767 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11768 dwarf2_per_objfile
->dwo_files
11769 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11771 find_entry
.dwo_name
= dwo_name
;
11772 find_entry
.comp_dir
= comp_dir
;
11773 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
.get (), &find_entry
,
11780 hash_dwo_unit (const void *item
)
11782 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11784 /* This drops the top 32 bits of the id, but is ok for a hash. */
11785 return dwo_unit
->signature
;
11789 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11791 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11792 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11794 /* The signature is assumed to be unique within the DWO file.
11795 So while object file CU dwo_id's always have the value zero,
11796 that's OK, assuming each object file DWO file has only one CU,
11797 and that's the rule for now. */
11798 return lhs
->signature
== rhs
->signature
;
11801 /* Allocate a hash table for DWO CUs,TUs.
11802 There is one of these tables for each of CUs,TUs for each DWO file. */
11805 allocate_dwo_unit_table (struct objfile
*objfile
)
11807 /* Start out with a pretty small number.
11808 Generally DWO files contain only one CU and maybe some TUs. */
11809 return htab_create_alloc_ex (3,
11813 &objfile
->objfile_obstack
,
11814 hashtab_obstack_allocate
,
11815 dummy_obstack_deallocate
);
11818 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11820 struct create_dwo_cu_data
11822 struct dwo_file
*dwo_file
;
11823 struct dwo_unit dwo_unit
;
11826 /* die_reader_func for create_dwo_cu. */
11829 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11830 const gdb_byte
*info_ptr
,
11831 struct die_info
*comp_unit_die
,
11835 struct dwarf2_cu
*cu
= reader
->cu
;
11836 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11837 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11838 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11839 struct dwo_file
*dwo_file
= data
->dwo_file
;
11840 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11841 struct attribute
*attr
;
11843 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11846 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11847 " its dwo_id [in module %s]"),
11848 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11852 dwo_unit
->dwo_file
= dwo_file
;
11853 dwo_unit
->signature
= DW_UNSND (attr
);
11854 dwo_unit
->section
= section
;
11855 dwo_unit
->sect_off
= sect_off
;
11856 dwo_unit
->length
= cu
->per_cu
->length
;
11858 if (dwarf_read_debug
)
11859 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11860 sect_offset_str (sect_off
),
11861 hex_string (dwo_unit
->signature
));
11864 /* Create the dwo_units for the CUs in a DWO_FILE.
11865 Note: This function processes DWO files only, not DWP files. */
11868 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11869 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11872 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11873 const gdb_byte
*info_ptr
, *end_ptr
;
11875 dwarf2_read_section (objfile
, §ion
);
11876 info_ptr
= section
.buffer
;
11878 if (info_ptr
== NULL
)
11881 if (dwarf_read_debug
)
11883 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11884 get_section_name (§ion
),
11885 get_section_file_name (§ion
));
11888 end_ptr
= info_ptr
+ section
.size
;
11889 while (info_ptr
< end_ptr
)
11891 struct dwarf2_per_cu_data per_cu
;
11892 struct create_dwo_cu_data create_dwo_cu_data
;
11893 struct dwo_unit
*dwo_unit
;
11895 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11897 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11898 sizeof (create_dwo_cu_data
.dwo_unit
));
11899 memset (&per_cu
, 0, sizeof (per_cu
));
11900 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11901 per_cu
.is_debug_types
= 0;
11902 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11903 per_cu
.section
= §ion
;
11904 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11906 init_cutu_and_read_dies_no_follow (
11907 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11908 info_ptr
+= per_cu
.length
;
11910 // If the unit could not be parsed, skip it.
11911 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11914 if (cus_htab
== NULL
)
11915 cus_htab
= allocate_dwo_unit_table (objfile
);
11917 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11918 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
11919 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11920 gdb_assert (slot
!= NULL
);
11923 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11924 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11926 complaint (_("debug cu entry at offset %s is duplicate to"
11927 " the entry at offset %s, signature %s"),
11928 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11929 hex_string (dwo_unit
->signature
));
11931 *slot
= (void *)dwo_unit
;
11935 /* DWP file .debug_{cu,tu}_index section format:
11936 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11940 Both index sections have the same format, and serve to map a 64-bit
11941 signature to a set of section numbers. Each section begins with a header,
11942 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11943 indexes, and a pool of 32-bit section numbers. The index sections will be
11944 aligned at 8-byte boundaries in the file.
11946 The index section header consists of:
11948 V, 32 bit version number
11950 N, 32 bit number of compilation units or type units in the index
11951 M, 32 bit number of slots in the hash table
11953 Numbers are recorded using the byte order of the application binary.
11955 The hash table begins at offset 16 in the section, and consists of an array
11956 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11957 order of the application binary). Unused slots in the hash table are 0.
11958 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11960 The parallel table begins immediately after the hash table
11961 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11962 array of 32-bit indexes (using the byte order of the application binary),
11963 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11964 table contains a 32-bit index into the pool of section numbers. For unused
11965 hash table slots, the corresponding entry in the parallel table will be 0.
11967 The pool of section numbers begins immediately following the hash table
11968 (at offset 16 + 12 * M from the beginning of the section). The pool of
11969 section numbers consists of an array of 32-bit words (using the byte order
11970 of the application binary). Each item in the array is indexed starting
11971 from 0. The hash table entry provides the index of the first section
11972 number in the set. Additional section numbers in the set follow, and the
11973 set is terminated by a 0 entry (section number 0 is not used in ELF).
11975 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11976 section must be the first entry in the set, and the .debug_abbrev.dwo must
11977 be the second entry. Other members of the set may follow in any order.
11983 DWP Version 2 combines all the .debug_info, etc. sections into one,
11984 and the entries in the index tables are now offsets into these sections.
11985 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11988 Index Section Contents:
11990 Hash Table of Signatures dwp_hash_table.hash_table
11991 Parallel Table of Indices dwp_hash_table.unit_table
11992 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11993 Table of Section Sizes dwp_hash_table.v2.sizes
11995 The index section header consists of:
11997 V, 32 bit version number
11998 L, 32 bit number of columns in the table of section offsets
11999 N, 32 bit number of compilation units or type units in the index
12000 M, 32 bit number of slots in the hash table
12002 Numbers are recorded using the byte order of the application binary.
12004 The hash table has the same format as version 1.
12005 The parallel table of indices has the same format as version 1,
12006 except that the entries are origin-1 indices into the table of sections
12007 offsets and the table of section sizes.
12009 The table of offsets begins immediately following the parallel table
12010 (at offset 16 + 12 * M from the beginning of the section). The table is
12011 a two-dimensional array of 32-bit words (using the byte order of the
12012 application binary), with L columns and N+1 rows, in row-major order.
12013 Each row in the array is indexed starting from 0. The first row provides
12014 a key to the remaining rows: each column in this row provides an identifier
12015 for a debug section, and the offsets in the same column of subsequent rows
12016 refer to that section. The section identifiers are:
12018 DW_SECT_INFO 1 .debug_info.dwo
12019 DW_SECT_TYPES 2 .debug_types.dwo
12020 DW_SECT_ABBREV 3 .debug_abbrev.dwo
12021 DW_SECT_LINE 4 .debug_line.dwo
12022 DW_SECT_LOC 5 .debug_loc.dwo
12023 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
12024 DW_SECT_MACINFO 7 .debug_macinfo.dwo
12025 DW_SECT_MACRO 8 .debug_macro.dwo
12027 The offsets provided by the CU and TU index sections are the base offsets
12028 for the contributions made by each CU or TU to the corresponding section
12029 in the package file. Each CU and TU header contains an abbrev_offset
12030 field, used to find the abbreviations table for that CU or TU within the
12031 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
12032 be interpreted as relative to the base offset given in the index section.
12033 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
12034 should be interpreted as relative to the base offset for .debug_line.dwo,
12035 and offsets into other debug sections obtained from DWARF attributes should
12036 also be interpreted as relative to the corresponding base offset.
12038 The table of sizes begins immediately following the table of offsets.
12039 Like the table of offsets, it is a two-dimensional array of 32-bit words,
12040 with L columns and N rows, in row-major order. Each row in the array is
12041 indexed starting from 1 (row 0 is shared by the two tables).
12045 Hash table lookup is handled the same in version 1 and 2:
12047 We assume that N and M will not exceed 2^32 - 1.
12048 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12050 Given a 64-bit compilation unit signature or a type signature S, an entry
12051 in the hash table is located as follows:
12053 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12054 the low-order k bits all set to 1.
12056 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12058 3) If the hash table entry at index H matches the signature, use that
12059 entry. If the hash table entry at index H is unused (all zeroes),
12060 terminate the search: the signature is not present in the table.
12062 4) Let H = (H + H') modulo M. Repeat at Step 3.
12064 Because M > N and H' and M are relatively prime, the search is guaranteed
12065 to stop at an unused slot or find the match. */
12067 /* Create a hash table to map DWO IDs to their CU/TU entry in
12068 .debug_{info,types}.dwo in DWP_FILE.
12069 Returns NULL if there isn't one.
12070 Note: This function processes DWP files only, not DWO files. */
12072 static struct dwp_hash_table
*
12073 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12074 struct dwp_file
*dwp_file
, int is_debug_types
)
12076 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12077 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12078 const gdb_byte
*index_ptr
, *index_end
;
12079 struct dwarf2_section_info
*index
;
12080 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12081 struct dwp_hash_table
*htab
;
12083 if (is_debug_types
)
12084 index
= &dwp_file
->sections
.tu_index
;
12086 index
= &dwp_file
->sections
.cu_index
;
12088 if (dwarf2_section_empty_p (index
))
12090 dwarf2_read_section (objfile
, index
);
12092 index_ptr
= index
->buffer
;
12093 index_end
= index_ptr
+ index
->size
;
12095 version
= read_4_bytes (dbfd
, index_ptr
);
12098 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12102 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12104 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12107 if (version
!= 1 && version
!= 2)
12109 error (_("Dwarf Error: unsupported DWP file version (%s)"
12110 " [in module %s]"),
12111 pulongest (version
), dwp_file
->name
);
12113 if (nr_slots
!= (nr_slots
& -nr_slots
))
12115 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12116 " is not power of 2 [in module %s]"),
12117 pulongest (nr_slots
), dwp_file
->name
);
12120 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12121 htab
->version
= version
;
12122 htab
->nr_columns
= nr_columns
;
12123 htab
->nr_units
= nr_units
;
12124 htab
->nr_slots
= nr_slots
;
12125 htab
->hash_table
= index_ptr
;
12126 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12128 /* Exit early if the table is empty. */
12129 if (nr_slots
== 0 || nr_units
== 0
12130 || (version
== 2 && nr_columns
== 0))
12132 /* All must be zero. */
12133 if (nr_slots
!= 0 || nr_units
!= 0
12134 || (version
== 2 && nr_columns
!= 0))
12136 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
12137 " all zero [in modules %s]"),
12145 htab
->section_pool
.v1
.indices
=
12146 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12147 /* It's harder to decide whether the section is too small in v1.
12148 V1 is deprecated anyway so we punt. */
12152 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12153 int *ids
= htab
->section_pool
.v2
.section_ids
;
12154 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
12155 /* Reverse map for error checking. */
12156 int ids_seen
[DW_SECT_MAX
+ 1];
12159 if (nr_columns
< 2)
12161 error (_("Dwarf Error: bad DWP hash table, too few columns"
12162 " in section table [in module %s]"),
12165 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12167 error (_("Dwarf Error: bad DWP hash table, too many columns"
12168 " in section table [in module %s]"),
12171 memset (ids
, 255, sizeof_ids
);
12172 memset (ids_seen
, 255, sizeof (ids_seen
));
12173 for (i
= 0; i
< nr_columns
; ++i
)
12175 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12177 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12179 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12180 " in section table [in module %s]"),
12181 id
, dwp_file
->name
);
12183 if (ids_seen
[id
] != -1)
12185 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12186 " id %d in section table [in module %s]"),
12187 id
, dwp_file
->name
);
12192 /* Must have exactly one info or types section. */
12193 if (((ids_seen
[DW_SECT_INFO
] != -1)
12194 + (ids_seen
[DW_SECT_TYPES
] != -1))
12197 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12198 " DWO info/types section [in module %s]"),
12201 /* Must have an abbrev section. */
12202 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12204 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12205 " section [in module %s]"),
12208 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12209 htab
->section_pool
.v2
.sizes
=
12210 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12211 * nr_units
* nr_columns
);
12212 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12213 * nr_units
* nr_columns
))
12216 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12217 " [in module %s]"),
12225 /* Update SECTIONS with the data from SECTP.
12227 This function is like the other "locate" section routines that are
12228 passed to bfd_map_over_sections, but in this context the sections to
12229 read comes from the DWP V1 hash table, not the full ELF section table.
12231 The result is non-zero for success, or zero if an error was found. */
12234 locate_v1_virtual_dwo_sections (asection
*sectp
,
12235 struct virtual_v1_dwo_sections
*sections
)
12237 const struct dwop_section_names
*names
= &dwop_section_names
;
12239 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12241 /* There can be only one. */
12242 if (sections
->abbrev
.s
.section
!= NULL
)
12244 sections
->abbrev
.s
.section
= sectp
;
12245 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12247 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12248 || section_is_p (sectp
->name
, &names
->types_dwo
))
12250 /* There can be only one. */
12251 if (sections
->info_or_types
.s
.section
!= NULL
)
12253 sections
->info_or_types
.s
.section
= sectp
;
12254 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12256 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12258 /* There can be only one. */
12259 if (sections
->line
.s
.section
!= NULL
)
12261 sections
->line
.s
.section
= sectp
;
12262 sections
->line
.size
= bfd_get_section_size (sectp
);
12264 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12266 /* There can be only one. */
12267 if (sections
->loc
.s
.section
!= NULL
)
12269 sections
->loc
.s
.section
= sectp
;
12270 sections
->loc
.size
= bfd_get_section_size (sectp
);
12272 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12274 /* There can be only one. */
12275 if (sections
->macinfo
.s
.section
!= NULL
)
12277 sections
->macinfo
.s
.section
= sectp
;
12278 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12280 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12282 /* There can be only one. */
12283 if (sections
->macro
.s
.section
!= NULL
)
12285 sections
->macro
.s
.section
= sectp
;
12286 sections
->macro
.size
= bfd_get_section_size (sectp
);
12288 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12290 /* There can be only one. */
12291 if (sections
->str_offsets
.s
.section
!= NULL
)
12293 sections
->str_offsets
.s
.section
= sectp
;
12294 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12298 /* No other kind of section is valid. */
12305 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12306 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12307 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12308 This is for DWP version 1 files. */
12310 static struct dwo_unit
*
12311 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12312 struct dwp_file
*dwp_file
,
12313 uint32_t unit_index
,
12314 const char *comp_dir
,
12315 ULONGEST signature
, int is_debug_types
)
12317 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12318 const struct dwp_hash_table
*dwp_htab
=
12319 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12320 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12321 const char *kind
= is_debug_types
? "TU" : "CU";
12322 struct dwo_file
*dwo_file
;
12323 struct dwo_unit
*dwo_unit
;
12324 struct virtual_v1_dwo_sections sections
;
12325 void **dwo_file_slot
;
12328 gdb_assert (dwp_file
->version
== 1);
12330 if (dwarf_read_debug
)
12332 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12334 pulongest (unit_index
), hex_string (signature
),
12338 /* Fetch the sections of this DWO unit.
12339 Put a limit on the number of sections we look for so that bad data
12340 doesn't cause us to loop forever. */
12342 #define MAX_NR_V1_DWO_SECTIONS \
12343 (1 /* .debug_info or .debug_types */ \
12344 + 1 /* .debug_abbrev */ \
12345 + 1 /* .debug_line */ \
12346 + 1 /* .debug_loc */ \
12347 + 1 /* .debug_str_offsets */ \
12348 + 1 /* .debug_macro or .debug_macinfo */ \
12349 + 1 /* trailing zero */)
12351 memset (§ions
, 0, sizeof (sections
));
12353 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12356 uint32_t section_nr
=
12357 read_4_bytes (dbfd
,
12358 dwp_htab
->section_pool
.v1
.indices
12359 + (unit_index
+ i
) * sizeof (uint32_t));
12361 if (section_nr
== 0)
12363 if (section_nr
>= dwp_file
->num_sections
)
12365 error (_("Dwarf Error: bad DWP hash table, section number too large"
12366 " [in module %s]"),
12370 sectp
= dwp_file
->elf_sections
[section_nr
];
12371 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12373 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12374 " [in module %s]"),
12380 || dwarf2_section_empty_p (§ions
.info_or_types
)
12381 || dwarf2_section_empty_p (§ions
.abbrev
))
12383 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12384 " [in module %s]"),
12387 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12389 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12390 " [in module %s]"),
12394 /* It's easier for the rest of the code if we fake a struct dwo_file and
12395 have dwo_unit "live" in that. At least for now.
12397 The DWP file can be made up of a random collection of CUs and TUs.
12398 However, for each CU + set of TUs that came from the same original DWO
12399 file, we can combine them back into a virtual DWO file to save space
12400 (fewer struct dwo_file objects to allocate). Remember that for really
12401 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12403 std::string virtual_dwo_name
=
12404 string_printf ("virtual-dwo/%d-%d-%d-%d",
12405 get_section_id (§ions
.abbrev
),
12406 get_section_id (§ions
.line
),
12407 get_section_id (§ions
.loc
),
12408 get_section_id (§ions
.str_offsets
));
12409 /* Can we use an existing virtual DWO file? */
12410 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12411 virtual_dwo_name
.c_str (),
12413 /* Create one if necessary. */
12414 if (*dwo_file_slot
== NULL
)
12416 if (dwarf_read_debug
)
12418 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12419 virtual_dwo_name
.c_str ());
12421 dwo_file
= new struct dwo_file
;
12422 dwo_file
->dwo_name
= obstack_strdup (&objfile
->objfile_obstack
,
12424 dwo_file
->comp_dir
= comp_dir
;
12425 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12426 dwo_file
->sections
.line
= sections
.line
;
12427 dwo_file
->sections
.loc
= sections
.loc
;
12428 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12429 dwo_file
->sections
.macro
= sections
.macro
;
12430 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12431 /* The "str" section is global to the entire DWP file. */
12432 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12433 /* The info or types section is assigned below to dwo_unit,
12434 there's no need to record it in dwo_file.
12435 Also, we can't simply record type sections in dwo_file because
12436 we record a pointer into the vector in dwo_unit. As we collect more
12437 types we'll grow the vector and eventually have to reallocate space
12438 for it, invalidating all copies of pointers into the previous
12440 *dwo_file_slot
= dwo_file
;
12444 if (dwarf_read_debug
)
12446 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12447 virtual_dwo_name
.c_str ());
12449 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12452 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12453 dwo_unit
->dwo_file
= dwo_file
;
12454 dwo_unit
->signature
= signature
;
12455 dwo_unit
->section
=
12456 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12457 *dwo_unit
->section
= sections
.info_or_types
;
12458 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12463 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12464 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12465 piece within that section used by a TU/CU, return a virtual section
12466 of just that piece. */
12468 static struct dwarf2_section_info
12469 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12470 struct dwarf2_section_info
*section
,
12471 bfd_size_type offset
, bfd_size_type size
)
12473 struct dwarf2_section_info result
;
12476 gdb_assert (section
!= NULL
);
12477 gdb_assert (!section
->is_virtual
);
12479 memset (&result
, 0, sizeof (result
));
12480 result
.s
.containing_section
= section
;
12481 result
.is_virtual
= true;
12486 sectp
= get_section_bfd_section (section
);
12488 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12489 bounds of the real section. This is a pretty-rare event, so just
12490 flag an error (easier) instead of a warning and trying to cope. */
12492 || offset
+ size
> bfd_get_section_size (sectp
))
12494 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12495 " in section %s [in module %s]"),
12496 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12497 objfile_name (dwarf2_per_objfile
->objfile
));
12500 result
.virtual_offset
= offset
;
12501 result
.size
= size
;
12505 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12506 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12507 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12508 This is for DWP version 2 files. */
12510 static struct dwo_unit
*
12511 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12512 struct dwp_file
*dwp_file
,
12513 uint32_t unit_index
,
12514 const char *comp_dir
,
12515 ULONGEST signature
, int is_debug_types
)
12517 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12518 const struct dwp_hash_table
*dwp_htab
=
12519 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12520 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12521 const char *kind
= is_debug_types
? "TU" : "CU";
12522 struct dwo_file
*dwo_file
;
12523 struct dwo_unit
*dwo_unit
;
12524 struct virtual_v2_dwo_sections sections
;
12525 void **dwo_file_slot
;
12528 gdb_assert (dwp_file
->version
== 2);
12530 if (dwarf_read_debug
)
12532 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12534 pulongest (unit_index
), hex_string (signature
),
12538 /* Fetch the section offsets of this DWO unit. */
12540 memset (§ions
, 0, sizeof (sections
));
12542 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12544 uint32_t offset
= read_4_bytes (dbfd
,
12545 dwp_htab
->section_pool
.v2
.offsets
12546 + (((unit_index
- 1) * dwp_htab
->nr_columns
12548 * sizeof (uint32_t)));
12549 uint32_t size
= read_4_bytes (dbfd
,
12550 dwp_htab
->section_pool
.v2
.sizes
12551 + (((unit_index
- 1) * dwp_htab
->nr_columns
12553 * sizeof (uint32_t)));
12555 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12558 case DW_SECT_TYPES
:
12559 sections
.info_or_types_offset
= offset
;
12560 sections
.info_or_types_size
= size
;
12562 case DW_SECT_ABBREV
:
12563 sections
.abbrev_offset
= offset
;
12564 sections
.abbrev_size
= size
;
12567 sections
.line_offset
= offset
;
12568 sections
.line_size
= size
;
12571 sections
.loc_offset
= offset
;
12572 sections
.loc_size
= size
;
12574 case DW_SECT_STR_OFFSETS
:
12575 sections
.str_offsets_offset
= offset
;
12576 sections
.str_offsets_size
= size
;
12578 case DW_SECT_MACINFO
:
12579 sections
.macinfo_offset
= offset
;
12580 sections
.macinfo_size
= size
;
12582 case DW_SECT_MACRO
:
12583 sections
.macro_offset
= offset
;
12584 sections
.macro_size
= size
;
12589 /* It's easier for the rest of the code if we fake a struct dwo_file and
12590 have dwo_unit "live" in that. At least for now.
12592 The DWP file can be made up of a random collection of CUs and TUs.
12593 However, for each CU + set of TUs that came from the same original DWO
12594 file, we can combine them back into a virtual DWO file to save space
12595 (fewer struct dwo_file objects to allocate). Remember that for really
12596 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12598 std::string virtual_dwo_name
=
12599 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12600 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12601 (long) (sections
.line_size
? sections
.line_offset
: 0),
12602 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12603 (long) (sections
.str_offsets_size
12604 ? sections
.str_offsets_offset
: 0));
12605 /* Can we use an existing virtual DWO file? */
12606 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12607 virtual_dwo_name
.c_str (),
12609 /* Create one if necessary. */
12610 if (*dwo_file_slot
== NULL
)
12612 if (dwarf_read_debug
)
12614 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12615 virtual_dwo_name
.c_str ());
12617 dwo_file
= new struct dwo_file
;
12618 dwo_file
->dwo_name
= obstack_strdup (&objfile
->objfile_obstack
,
12620 dwo_file
->comp_dir
= comp_dir
;
12621 dwo_file
->sections
.abbrev
=
12622 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12623 sections
.abbrev_offset
, sections
.abbrev_size
);
12624 dwo_file
->sections
.line
=
12625 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12626 sections
.line_offset
, sections
.line_size
);
12627 dwo_file
->sections
.loc
=
12628 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12629 sections
.loc_offset
, sections
.loc_size
);
12630 dwo_file
->sections
.macinfo
=
12631 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12632 sections
.macinfo_offset
, sections
.macinfo_size
);
12633 dwo_file
->sections
.macro
=
12634 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12635 sections
.macro_offset
, sections
.macro_size
);
12636 dwo_file
->sections
.str_offsets
=
12637 create_dwp_v2_section (dwarf2_per_objfile
,
12638 &dwp_file
->sections
.str_offsets
,
12639 sections
.str_offsets_offset
,
12640 sections
.str_offsets_size
);
12641 /* The "str" section is global to the entire DWP file. */
12642 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12643 /* The info or types section is assigned below to dwo_unit,
12644 there's no need to record it in dwo_file.
12645 Also, we can't simply record type sections in dwo_file because
12646 we record a pointer into the vector in dwo_unit. As we collect more
12647 types we'll grow the vector and eventually have to reallocate space
12648 for it, invalidating all copies of pointers into the previous
12650 *dwo_file_slot
= dwo_file
;
12654 if (dwarf_read_debug
)
12656 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12657 virtual_dwo_name
.c_str ());
12659 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12662 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12663 dwo_unit
->dwo_file
= dwo_file
;
12664 dwo_unit
->signature
= signature
;
12665 dwo_unit
->section
=
12666 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12667 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12669 ? &dwp_file
->sections
.types
12670 : &dwp_file
->sections
.info
,
12671 sections
.info_or_types_offset
,
12672 sections
.info_or_types_size
);
12673 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12678 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12679 Returns NULL if the signature isn't found. */
12681 static struct dwo_unit
*
12682 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12683 struct dwp_file
*dwp_file
, const char *comp_dir
,
12684 ULONGEST signature
, int is_debug_types
)
12686 const struct dwp_hash_table
*dwp_htab
=
12687 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12688 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12689 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12690 uint32_t hash
= signature
& mask
;
12691 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12694 struct dwo_unit find_dwo_cu
;
12696 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12697 find_dwo_cu
.signature
= signature
;
12698 slot
= htab_find_slot (is_debug_types
12699 ? dwp_file
->loaded_tus
12700 : dwp_file
->loaded_cus
,
12701 &find_dwo_cu
, INSERT
);
12704 return (struct dwo_unit
*) *slot
;
12706 /* Use a for loop so that we don't loop forever on bad debug info. */
12707 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12709 ULONGEST signature_in_table
;
12711 signature_in_table
=
12712 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12713 if (signature_in_table
== signature
)
12715 uint32_t unit_index
=
12716 read_4_bytes (dbfd
,
12717 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12719 if (dwp_file
->version
== 1)
12721 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12722 dwp_file
, unit_index
,
12723 comp_dir
, signature
,
12728 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12729 dwp_file
, unit_index
,
12730 comp_dir
, signature
,
12733 return (struct dwo_unit
*) *slot
;
12735 if (signature_in_table
== 0)
12737 hash
= (hash
+ hash2
) & mask
;
12740 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12741 " [in module %s]"),
12745 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12746 Open the file specified by FILE_NAME and hand it off to BFD for
12747 preliminary analysis. Return a newly initialized bfd *, which
12748 includes a canonicalized copy of FILE_NAME.
12749 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12750 SEARCH_CWD is true if the current directory is to be searched.
12751 It will be searched before debug-file-directory.
12752 If successful, the file is added to the bfd include table of the
12753 objfile's bfd (see gdb_bfd_record_inclusion).
12754 If unable to find/open the file, return NULL.
12755 NOTE: This function is derived from symfile_bfd_open. */
12757 static gdb_bfd_ref_ptr
12758 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12759 const char *file_name
, int is_dwp
, int search_cwd
)
12762 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12763 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12764 to debug_file_directory. */
12765 const char *search_path
;
12766 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12768 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12771 if (*debug_file_directory
!= '\0')
12773 search_path_holder
.reset (concat (".", dirname_separator_string
,
12774 debug_file_directory
,
12776 search_path
= search_path_holder
.get ();
12782 search_path
= debug_file_directory
;
12784 openp_flags flags
= OPF_RETURN_REALPATH
;
12786 flags
|= OPF_SEARCH_IN_PATH
;
12788 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12789 desc
= openp (search_path
, flags
, file_name
,
12790 O_RDONLY
| O_BINARY
, &absolute_name
);
12794 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12796 if (sym_bfd
== NULL
)
12798 bfd_set_cacheable (sym_bfd
.get (), 1);
12800 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12803 /* Success. Record the bfd as having been included by the objfile's bfd.
12804 This is important because things like demangled_names_hash lives in the
12805 objfile's per_bfd space and may have references to things like symbol
12806 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12807 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12812 /* Try to open DWO file FILE_NAME.
12813 COMP_DIR is the DW_AT_comp_dir attribute.
12814 The result is the bfd handle of the file.
12815 If there is a problem finding or opening the file, return NULL.
12816 Upon success, the canonicalized path of the file is stored in the bfd,
12817 same as symfile_bfd_open. */
12819 static gdb_bfd_ref_ptr
12820 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12821 const char *file_name
, const char *comp_dir
)
12823 if (IS_ABSOLUTE_PATH (file_name
))
12824 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12825 0 /*is_dwp*/, 0 /*search_cwd*/);
12827 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12829 if (comp_dir
!= NULL
)
12831 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12832 file_name
, (char *) NULL
);
12834 /* NOTE: If comp_dir is a relative path, this will also try the
12835 search path, which seems useful. */
12836 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12839 1 /*search_cwd*/));
12840 xfree (path_to_try
);
12845 /* That didn't work, try debug-file-directory, which, despite its name,
12846 is a list of paths. */
12848 if (*debug_file_directory
== '\0')
12851 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12852 0 /*is_dwp*/, 1 /*search_cwd*/);
12855 /* This function is mapped across the sections and remembers the offset and
12856 size of each of the DWO debugging sections we are interested in. */
12859 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12861 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12862 const struct dwop_section_names
*names
= &dwop_section_names
;
12864 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12866 dwo_sections
->abbrev
.s
.section
= sectp
;
12867 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12869 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12871 dwo_sections
->info
.s
.section
= sectp
;
12872 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12874 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12876 dwo_sections
->line
.s
.section
= sectp
;
12877 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12879 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12881 dwo_sections
->loc
.s
.section
= sectp
;
12882 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
12884 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12886 dwo_sections
->macinfo
.s
.section
= sectp
;
12887 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12889 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12891 dwo_sections
->macro
.s
.section
= sectp
;
12892 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
12894 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12896 dwo_sections
->str
.s
.section
= sectp
;
12897 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
12899 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12901 dwo_sections
->str_offsets
.s
.section
= sectp
;
12902 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12904 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12906 struct dwarf2_section_info type_section
;
12908 memset (&type_section
, 0, sizeof (type_section
));
12909 type_section
.s
.section
= sectp
;
12910 type_section
.size
= bfd_get_section_size (sectp
);
12911 dwo_sections
->types
.push_back (type_section
);
12915 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12916 by PER_CU. This is for the non-DWP case.
12917 The result is NULL if DWO_NAME can't be found. */
12919 static struct dwo_file
*
12920 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12921 const char *dwo_name
, const char *comp_dir
)
12923 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12925 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12928 if (dwarf_read_debug
)
12929 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12933 dwo_file_up
dwo_file (new struct dwo_file
);
12934 dwo_file
->dwo_name
= dwo_name
;
12935 dwo_file
->comp_dir
= comp_dir
;
12936 dwo_file
->dbfd
= std::move (dbfd
);
12938 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12939 &dwo_file
->sections
);
12941 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
12944 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12945 dwo_file
->sections
.types
, dwo_file
->tus
);
12947 if (dwarf_read_debug
)
12948 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12950 return dwo_file
.release ();
12953 /* This function is mapped across the sections and remembers the offset and
12954 size of each of the DWP debugging sections common to version 1 and 2 that
12955 we are interested in. */
12958 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12959 void *dwp_file_ptr
)
12961 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12962 const struct dwop_section_names
*names
= &dwop_section_names
;
12963 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12965 /* Record the ELF section number for later lookup: this is what the
12966 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12967 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12968 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12970 /* Look for specific sections that we need. */
12971 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12973 dwp_file
->sections
.str
.s
.section
= sectp
;
12974 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
12976 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12978 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12979 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
12981 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12983 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12984 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
12988 /* This function is mapped across the sections and remembers the offset and
12989 size of each of the DWP version 2 debugging sections that we are interested
12990 in. This is split into a separate function because we don't know if we
12991 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12994 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12996 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12997 const struct dwop_section_names
*names
= &dwop_section_names
;
12998 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13000 /* Record the ELF section number for later lookup: this is what the
13001 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13002 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13003 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13005 /* Look for specific sections that we need. */
13006 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
13008 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
13009 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
13011 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
13013 dwp_file
->sections
.info
.s
.section
= sectp
;
13014 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
13016 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
13018 dwp_file
->sections
.line
.s
.section
= sectp
;
13019 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
13021 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
13023 dwp_file
->sections
.loc
.s
.section
= sectp
;
13024 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
13026 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
13028 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
13029 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
13031 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13033 dwp_file
->sections
.macro
.s
.section
= sectp
;
13034 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
13036 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13038 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13039 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
13041 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13043 dwp_file
->sections
.types
.s
.section
= sectp
;
13044 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
13048 /* Hash function for dwp_file loaded CUs/TUs. */
13051 hash_dwp_loaded_cutus (const void *item
)
13053 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13055 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13056 return dwo_unit
->signature
;
13059 /* Equality function for dwp_file loaded CUs/TUs. */
13062 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13064 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13065 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13067 return dua
->signature
== dub
->signature
;
13070 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13073 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13075 return htab_create_alloc_ex (3,
13076 hash_dwp_loaded_cutus
,
13077 eq_dwp_loaded_cutus
,
13079 &objfile
->objfile_obstack
,
13080 hashtab_obstack_allocate
,
13081 dummy_obstack_deallocate
);
13084 /* Try to open DWP file FILE_NAME.
13085 The result is the bfd handle of the file.
13086 If there is a problem finding or opening the file, return NULL.
13087 Upon success, the canonicalized path of the file is stored in the bfd,
13088 same as symfile_bfd_open. */
13090 static gdb_bfd_ref_ptr
13091 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13092 const char *file_name
)
13094 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13096 1 /*search_cwd*/));
13100 /* Work around upstream bug 15652.
13101 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13102 [Whether that's a "bug" is debatable, but it is getting in our way.]
13103 We have no real idea where the dwp file is, because gdb's realpath-ing
13104 of the executable's path may have discarded the needed info.
13105 [IWBN if the dwp file name was recorded in the executable, akin to
13106 .gnu_debuglink, but that doesn't exist yet.]
13107 Strip the directory from FILE_NAME and search again. */
13108 if (*debug_file_directory
!= '\0')
13110 /* Don't implicitly search the current directory here.
13111 If the user wants to search "." to handle this case,
13112 it must be added to debug-file-directory. */
13113 return try_open_dwop_file (dwarf2_per_objfile
,
13114 lbasename (file_name
), 1 /*is_dwp*/,
13121 /* Initialize the use of the DWP file for the current objfile.
13122 By convention the name of the DWP file is ${objfile}.dwp.
13123 The result is NULL if it can't be found. */
13125 static std::unique_ptr
<struct dwp_file
>
13126 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13128 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13130 /* Try to find first .dwp for the binary file before any symbolic links
13133 /* If the objfile is a debug file, find the name of the real binary
13134 file and get the name of dwp file from there. */
13135 std::string dwp_name
;
13136 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13138 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13139 const char *backlink_basename
= lbasename (backlink
->original_name
);
13141 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13144 dwp_name
= objfile
->original_name
;
13146 dwp_name
+= ".dwp";
13148 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13150 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13152 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13153 dwp_name
= objfile_name (objfile
);
13154 dwp_name
+= ".dwp";
13155 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13160 if (dwarf_read_debug
)
13161 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13162 return std::unique_ptr
<dwp_file
> ();
13165 const char *name
= bfd_get_filename (dbfd
.get ());
13166 std::unique_ptr
<struct dwp_file
> dwp_file
13167 (new struct dwp_file (name
, std::move (dbfd
)));
13169 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
13170 dwp_file
->elf_sections
=
13171 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13172 dwp_file
->num_sections
, asection
*);
13174 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13175 dwarf2_locate_common_dwp_sections
,
13178 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13181 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13184 /* The DWP file version is stored in the hash table. Oh well. */
13185 if (dwp_file
->cus
&& dwp_file
->tus
13186 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13188 /* Technically speaking, we should try to limp along, but this is
13189 pretty bizarre. We use pulongest here because that's the established
13190 portability solution (e.g, we cannot use %u for uint32_t). */
13191 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13192 " TU version %s [in DWP file %s]"),
13193 pulongest (dwp_file
->cus
->version
),
13194 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13198 dwp_file
->version
= dwp_file
->cus
->version
;
13199 else if (dwp_file
->tus
)
13200 dwp_file
->version
= dwp_file
->tus
->version
;
13202 dwp_file
->version
= 2;
13204 if (dwp_file
->version
== 2)
13205 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13206 dwarf2_locate_v2_dwp_sections
,
13209 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13210 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13212 if (dwarf_read_debug
)
13214 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13215 fprintf_unfiltered (gdb_stdlog
,
13216 " %s CUs, %s TUs\n",
13217 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13218 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13224 /* Wrapper around open_and_init_dwp_file, only open it once. */
13226 static struct dwp_file
*
13227 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13229 if (! dwarf2_per_objfile
->dwp_checked
)
13231 dwarf2_per_objfile
->dwp_file
13232 = open_and_init_dwp_file (dwarf2_per_objfile
);
13233 dwarf2_per_objfile
->dwp_checked
= 1;
13235 return dwarf2_per_objfile
->dwp_file
.get ();
13238 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13239 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13240 or in the DWP file for the objfile, referenced by THIS_UNIT.
13241 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13242 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13244 This is called, for example, when wanting to read a variable with a
13245 complex location. Therefore we don't want to do file i/o for every call.
13246 Therefore we don't want to look for a DWO file on every call.
13247 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13248 then we check if we've already seen DWO_NAME, and only THEN do we check
13251 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13252 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13254 static struct dwo_unit
*
13255 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13256 const char *dwo_name
, const char *comp_dir
,
13257 ULONGEST signature
, int is_debug_types
)
13259 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13260 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13261 const char *kind
= is_debug_types
? "TU" : "CU";
13262 void **dwo_file_slot
;
13263 struct dwo_file
*dwo_file
;
13264 struct dwp_file
*dwp_file
;
13266 /* First see if there's a DWP file.
13267 If we have a DWP file but didn't find the DWO inside it, don't
13268 look for the original DWO file. It makes gdb behave differently
13269 depending on whether one is debugging in the build tree. */
13271 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13272 if (dwp_file
!= NULL
)
13274 const struct dwp_hash_table
*dwp_htab
=
13275 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13277 if (dwp_htab
!= NULL
)
13279 struct dwo_unit
*dwo_cutu
=
13280 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13281 signature
, is_debug_types
);
13283 if (dwo_cutu
!= NULL
)
13285 if (dwarf_read_debug
)
13287 fprintf_unfiltered (gdb_stdlog
,
13288 "Virtual DWO %s %s found: @%s\n",
13289 kind
, hex_string (signature
),
13290 host_address_to_string (dwo_cutu
));
13298 /* No DWP file, look for the DWO file. */
13300 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13301 dwo_name
, comp_dir
);
13302 if (*dwo_file_slot
== NULL
)
13304 /* Read in the file and build a table of the CUs/TUs it contains. */
13305 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13307 /* NOTE: This will be NULL if unable to open the file. */
13308 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13310 if (dwo_file
!= NULL
)
13312 struct dwo_unit
*dwo_cutu
= NULL
;
13314 if (is_debug_types
&& dwo_file
->tus
)
13316 struct dwo_unit find_dwo_cutu
;
13318 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13319 find_dwo_cutu
.signature
= signature
;
13321 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13323 else if (!is_debug_types
&& dwo_file
->cus
)
13325 struct dwo_unit find_dwo_cutu
;
13327 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13328 find_dwo_cutu
.signature
= signature
;
13329 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13333 if (dwo_cutu
!= NULL
)
13335 if (dwarf_read_debug
)
13337 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13338 kind
, dwo_name
, hex_string (signature
),
13339 host_address_to_string (dwo_cutu
));
13346 /* We didn't find it. This could mean a dwo_id mismatch, or
13347 someone deleted the DWO/DWP file, or the search path isn't set up
13348 correctly to find the file. */
13350 if (dwarf_read_debug
)
13352 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13353 kind
, dwo_name
, hex_string (signature
));
13356 /* This is a warning and not a complaint because it can be caused by
13357 pilot error (e.g., user accidentally deleting the DWO). */
13359 /* Print the name of the DWP file if we looked there, helps the user
13360 better diagnose the problem. */
13361 std::string dwp_text
;
13363 if (dwp_file
!= NULL
)
13364 dwp_text
= string_printf (" [in DWP file %s]",
13365 lbasename (dwp_file
->name
));
13367 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13368 " [in module %s]"),
13369 kind
, dwo_name
, hex_string (signature
),
13371 this_unit
->is_debug_types
? "TU" : "CU",
13372 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13377 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13378 See lookup_dwo_cutu_unit for details. */
13380 static struct dwo_unit
*
13381 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13382 const char *dwo_name
, const char *comp_dir
,
13383 ULONGEST signature
)
13385 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13388 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13389 See lookup_dwo_cutu_unit for details. */
13391 static struct dwo_unit
*
13392 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13393 const char *dwo_name
, const char *comp_dir
)
13395 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13398 /* Traversal function for queue_and_load_all_dwo_tus. */
13401 queue_and_load_dwo_tu (void **slot
, void *info
)
13403 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13404 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13405 ULONGEST signature
= dwo_unit
->signature
;
13406 struct signatured_type
*sig_type
=
13407 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13409 if (sig_type
!= NULL
)
13411 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13413 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13414 a real dependency of PER_CU on SIG_TYPE. That is detected later
13415 while processing PER_CU. */
13416 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13417 load_full_type_unit (sig_cu
);
13418 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13424 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13425 The DWO may have the only definition of the type, though it may not be
13426 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13427 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13430 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13432 struct dwo_unit
*dwo_unit
;
13433 struct dwo_file
*dwo_file
;
13435 gdb_assert (!per_cu
->is_debug_types
);
13436 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13437 gdb_assert (per_cu
->cu
!= NULL
);
13439 dwo_unit
= per_cu
->cu
->dwo_unit
;
13440 gdb_assert (dwo_unit
!= NULL
);
13442 dwo_file
= dwo_unit
->dwo_file
;
13443 if (dwo_file
->tus
!= NULL
)
13444 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13447 /* Read in various DIEs. */
13449 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13450 Inherit only the children of the DW_AT_abstract_origin DIE not being
13451 already referenced by DW_AT_abstract_origin from the children of the
13455 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13457 struct die_info
*child_die
;
13458 sect_offset
*offsetp
;
13459 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13460 struct die_info
*origin_die
;
13461 /* Iterator of the ORIGIN_DIE children. */
13462 struct die_info
*origin_child_die
;
13463 struct attribute
*attr
;
13464 struct dwarf2_cu
*origin_cu
;
13465 struct pending
**origin_previous_list_in_scope
;
13467 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13471 /* Note that following die references may follow to a die in a
13475 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13477 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13479 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13480 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13482 if (die
->tag
!= origin_die
->tag
13483 && !(die
->tag
== DW_TAG_inlined_subroutine
13484 && origin_die
->tag
== DW_TAG_subprogram
))
13485 complaint (_("DIE %s and its abstract origin %s have different tags"),
13486 sect_offset_str (die
->sect_off
),
13487 sect_offset_str (origin_die
->sect_off
));
13489 std::vector
<sect_offset
> offsets
;
13491 for (child_die
= die
->child
;
13492 child_die
&& child_die
->tag
;
13493 child_die
= sibling_die (child_die
))
13495 struct die_info
*child_origin_die
;
13496 struct dwarf2_cu
*child_origin_cu
;
13498 /* We are trying to process concrete instance entries:
13499 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13500 it's not relevant to our analysis here. i.e. detecting DIEs that are
13501 present in the abstract instance but not referenced in the concrete
13503 if (child_die
->tag
== DW_TAG_call_site
13504 || child_die
->tag
== DW_TAG_GNU_call_site
)
13507 /* For each CHILD_DIE, find the corresponding child of
13508 ORIGIN_DIE. If there is more than one layer of
13509 DW_AT_abstract_origin, follow them all; there shouldn't be,
13510 but GCC versions at least through 4.4 generate this (GCC PR
13512 child_origin_die
= child_die
;
13513 child_origin_cu
= cu
;
13516 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13520 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13524 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13525 counterpart may exist. */
13526 if (child_origin_die
!= child_die
)
13528 if (child_die
->tag
!= child_origin_die
->tag
13529 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13530 && child_origin_die
->tag
== DW_TAG_subprogram
))
13531 complaint (_("Child DIE %s and its abstract origin %s have "
13533 sect_offset_str (child_die
->sect_off
),
13534 sect_offset_str (child_origin_die
->sect_off
));
13535 if (child_origin_die
->parent
!= origin_die
)
13536 complaint (_("Child DIE %s and its abstract origin %s have "
13537 "different parents"),
13538 sect_offset_str (child_die
->sect_off
),
13539 sect_offset_str (child_origin_die
->sect_off
));
13541 offsets
.push_back (child_origin_die
->sect_off
);
13544 std::sort (offsets
.begin (), offsets
.end ());
13545 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13546 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13547 if (offsetp
[-1] == *offsetp
)
13548 complaint (_("Multiple children of DIE %s refer "
13549 "to DIE %s as their abstract origin"),
13550 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13552 offsetp
= offsets
.data ();
13553 origin_child_die
= origin_die
->child
;
13554 while (origin_child_die
&& origin_child_die
->tag
)
13556 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13557 while (offsetp
< offsets_end
13558 && *offsetp
< origin_child_die
->sect_off
)
13560 if (offsetp
>= offsets_end
13561 || *offsetp
> origin_child_die
->sect_off
)
13563 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13564 Check whether we're already processing ORIGIN_CHILD_DIE.
13565 This can happen with mutually referenced abstract_origins.
13567 if (!origin_child_die
->in_process
)
13568 process_die (origin_child_die
, origin_cu
);
13570 origin_child_die
= sibling_die (origin_child_die
);
13572 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13576 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13578 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13579 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13580 struct context_stack
*newobj
;
13583 struct die_info
*child_die
;
13584 struct attribute
*attr
, *call_line
, *call_file
;
13586 CORE_ADDR baseaddr
;
13587 struct block
*block
;
13588 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13589 std::vector
<struct symbol
*> template_args
;
13590 struct template_symbol
*templ_func
= NULL
;
13594 /* If we do not have call site information, we can't show the
13595 caller of this inlined function. That's too confusing, so
13596 only use the scope for local variables. */
13597 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13598 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13599 if (call_line
== NULL
|| call_file
== NULL
)
13601 read_lexical_block_scope (die
, cu
);
13606 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13608 name
= dwarf2_name (die
, cu
);
13610 /* Ignore functions with missing or empty names. These are actually
13611 illegal according to the DWARF standard. */
13614 complaint (_("missing name for subprogram DIE at %s"),
13615 sect_offset_str (die
->sect_off
));
13619 /* Ignore functions with missing or invalid low and high pc attributes. */
13620 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13621 <= PC_BOUNDS_INVALID
)
13623 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13624 if (!attr
|| !DW_UNSND (attr
))
13625 complaint (_("cannot get low and high bounds "
13626 "for subprogram DIE at %s"),
13627 sect_offset_str (die
->sect_off
));
13631 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13632 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13634 /* If we have any template arguments, then we must allocate a
13635 different sort of symbol. */
13636 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13638 if (child_die
->tag
== DW_TAG_template_type_param
13639 || child_die
->tag
== DW_TAG_template_value_param
)
13641 templ_func
= allocate_template_symbol (objfile
);
13642 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13647 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13648 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13649 (struct symbol
*) templ_func
);
13651 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13652 set_objfile_main_name (objfile
, SYMBOL_LINKAGE_NAME (newobj
->name
),
13655 /* If there is a location expression for DW_AT_frame_base, record
13657 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13659 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13661 /* If there is a location for the static link, record it. */
13662 newobj
->static_link
= NULL
;
13663 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13666 newobj
->static_link
13667 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13668 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13669 dwarf2_per_cu_addr_type (cu
->per_cu
));
13672 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13674 if (die
->child
!= NULL
)
13676 child_die
= die
->child
;
13677 while (child_die
&& child_die
->tag
)
13679 if (child_die
->tag
== DW_TAG_template_type_param
13680 || child_die
->tag
== DW_TAG_template_value_param
)
13682 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13685 template_args
.push_back (arg
);
13688 process_die (child_die
, cu
);
13689 child_die
= sibling_die (child_die
);
13693 inherit_abstract_dies (die
, cu
);
13695 /* If we have a DW_AT_specification, we might need to import using
13696 directives from the context of the specification DIE. See the
13697 comment in determine_prefix. */
13698 if (cu
->language
== language_cplus
13699 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13701 struct dwarf2_cu
*spec_cu
= cu
;
13702 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13706 child_die
= spec_die
->child
;
13707 while (child_die
&& child_die
->tag
)
13709 if (child_die
->tag
== DW_TAG_imported_module
)
13710 process_die (child_die
, spec_cu
);
13711 child_die
= sibling_die (child_die
);
13714 /* In some cases, GCC generates specification DIEs that
13715 themselves contain DW_AT_specification attributes. */
13716 spec_die
= die_specification (spec_die
, &spec_cu
);
13720 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13721 /* Make a block for the local symbols within. */
13722 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13723 cstk
.static_link
, lowpc
, highpc
);
13725 /* For C++, set the block's scope. */
13726 if ((cu
->language
== language_cplus
13727 || cu
->language
== language_fortran
13728 || cu
->language
== language_d
13729 || cu
->language
== language_rust
)
13730 && cu
->processing_has_namespace_info
)
13731 block_set_scope (block
, determine_prefix (die
, cu
),
13732 &objfile
->objfile_obstack
);
13734 /* If we have address ranges, record them. */
13735 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13737 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13739 /* Attach template arguments to function. */
13740 if (!template_args
.empty ())
13742 gdb_assert (templ_func
!= NULL
);
13744 templ_func
->n_template_arguments
= template_args
.size ();
13745 templ_func
->template_arguments
13746 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13747 templ_func
->n_template_arguments
);
13748 memcpy (templ_func
->template_arguments
,
13749 template_args
.data (),
13750 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13752 /* Make sure that the symtab is set on the new symbols. Even
13753 though they don't appear in this symtab directly, other parts
13754 of gdb assume that symbols do, and this is reasonably
13756 for (symbol
*sym
: template_args
)
13757 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13760 /* In C++, we can have functions nested inside functions (e.g., when
13761 a function declares a class that has methods). This means that
13762 when we finish processing a function scope, we may need to go
13763 back to building a containing block's symbol lists. */
13764 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13765 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13767 /* If we've finished processing a top-level function, subsequent
13768 symbols go in the file symbol list. */
13769 if (cu
->get_builder ()->outermost_context_p ())
13770 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13773 /* Process all the DIES contained within a lexical block scope. Start
13774 a new scope, process the dies, and then close the scope. */
13777 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13779 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13780 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13781 CORE_ADDR lowpc
, highpc
;
13782 struct die_info
*child_die
;
13783 CORE_ADDR baseaddr
;
13785 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13787 /* Ignore blocks with missing or invalid low and high pc attributes. */
13788 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13789 as multiple lexical blocks? Handling children in a sane way would
13790 be nasty. Might be easier to properly extend generic blocks to
13791 describe ranges. */
13792 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13794 case PC_BOUNDS_NOT_PRESENT
:
13795 /* DW_TAG_lexical_block has no attributes, process its children as if
13796 there was no wrapping by that DW_TAG_lexical_block.
13797 GCC does no longer produces such DWARF since GCC r224161. */
13798 for (child_die
= die
->child
;
13799 child_die
!= NULL
&& child_die
->tag
;
13800 child_die
= sibling_die (child_die
))
13801 process_die (child_die
, cu
);
13803 case PC_BOUNDS_INVALID
:
13806 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13807 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13809 cu
->get_builder ()->push_context (0, lowpc
);
13810 if (die
->child
!= NULL
)
13812 child_die
= die
->child
;
13813 while (child_die
&& child_die
->tag
)
13815 process_die (child_die
, cu
);
13816 child_die
= sibling_die (child_die
);
13819 inherit_abstract_dies (die
, cu
);
13820 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13822 if (*cu
->get_builder ()->get_local_symbols () != NULL
13823 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13825 struct block
*block
13826 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13827 cstk
.start_addr
, highpc
);
13829 /* Note that recording ranges after traversing children, as we
13830 do here, means that recording a parent's ranges entails
13831 walking across all its children's ranges as they appear in
13832 the address map, which is quadratic behavior.
13834 It would be nicer to record the parent's ranges before
13835 traversing its children, simply overriding whatever you find
13836 there. But since we don't even decide whether to create a
13837 block until after we've traversed its children, that's hard
13839 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13841 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13842 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13845 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13848 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13850 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13851 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13852 CORE_ADDR pc
, baseaddr
;
13853 struct attribute
*attr
;
13854 struct call_site
*call_site
, call_site_local
;
13857 struct die_info
*child_die
;
13859 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13861 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13864 /* This was a pre-DWARF-5 GNU extension alias
13865 for DW_AT_call_return_pc. */
13866 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13870 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13871 "DIE %s [in module %s]"),
13872 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13875 pc
= attr_value_as_address (attr
) + baseaddr
;
13876 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13878 if (cu
->call_site_htab
== NULL
)
13879 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13880 NULL
, &objfile
->objfile_obstack
,
13881 hashtab_obstack_allocate
, NULL
);
13882 call_site_local
.pc
= pc
;
13883 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13886 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13887 "DIE %s [in module %s]"),
13888 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13889 objfile_name (objfile
));
13893 /* Count parameters at the caller. */
13896 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13897 child_die
= sibling_die (child_die
))
13899 if (child_die
->tag
!= DW_TAG_call_site_parameter
13900 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13902 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13903 "DW_TAG_call_site child DIE %s [in module %s]"),
13904 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13905 objfile_name (objfile
));
13913 = ((struct call_site
*)
13914 obstack_alloc (&objfile
->objfile_obstack
,
13915 sizeof (*call_site
)
13916 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13918 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13919 call_site
->pc
= pc
;
13921 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13922 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13924 struct die_info
*func_die
;
13926 /* Skip also over DW_TAG_inlined_subroutine. */
13927 for (func_die
= die
->parent
;
13928 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13929 && func_die
->tag
!= DW_TAG_subroutine_type
;
13930 func_die
= func_die
->parent
);
13932 /* DW_AT_call_all_calls is a superset
13933 of DW_AT_call_all_tail_calls. */
13935 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13936 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13937 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13938 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13940 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13941 not complete. But keep CALL_SITE for look ups via call_site_htab,
13942 both the initial caller containing the real return address PC and
13943 the final callee containing the current PC of a chain of tail
13944 calls do not need to have the tail call list complete. But any
13945 function candidate for a virtual tail call frame searched via
13946 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13947 determined unambiguously. */
13951 struct type
*func_type
= NULL
;
13954 func_type
= get_die_type (func_die
, cu
);
13955 if (func_type
!= NULL
)
13957 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13959 /* Enlist this call site to the function. */
13960 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13961 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13964 complaint (_("Cannot find function owning DW_TAG_call_site "
13965 "DIE %s [in module %s]"),
13966 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13970 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13972 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13974 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13977 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13978 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13980 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13981 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
13982 /* Keep NULL DWARF_BLOCK. */;
13983 else if (attr_form_is_block (attr
))
13985 struct dwarf2_locexpr_baton
*dlbaton
;
13987 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13988 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13989 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13990 dlbaton
->per_cu
= cu
->per_cu
;
13992 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13994 else if (attr_form_is_ref (attr
))
13996 struct dwarf2_cu
*target_cu
= cu
;
13997 struct die_info
*target_die
;
13999 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14000 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
14001 if (die_is_declaration (target_die
, target_cu
))
14003 const char *target_physname
;
14005 /* Prefer the mangled name; otherwise compute the demangled one. */
14006 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14007 if (target_physname
== NULL
)
14008 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14009 if (target_physname
== NULL
)
14010 complaint (_("DW_AT_call_target target DIE has invalid "
14011 "physname, for referencing DIE %s [in module %s]"),
14012 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14014 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14020 /* DW_AT_entry_pc should be preferred. */
14021 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14022 <= PC_BOUNDS_INVALID
)
14023 complaint (_("DW_AT_call_target target DIE has invalid "
14024 "low pc, for referencing DIE %s [in module %s]"),
14025 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14028 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14029 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14034 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
14035 "block nor reference, for DIE %s [in module %s]"),
14036 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14038 call_site
->per_cu
= cu
->per_cu
;
14040 for (child_die
= die
->child
;
14041 child_die
&& child_die
->tag
;
14042 child_die
= sibling_die (child_die
))
14044 struct call_site_parameter
*parameter
;
14045 struct attribute
*loc
, *origin
;
14047 if (child_die
->tag
!= DW_TAG_call_site_parameter
14048 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14050 /* Already printed the complaint above. */
14054 gdb_assert (call_site
->parameter_count
< nparams
);
14055 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14057 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14058 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14059 register is contained in DW_AT_call_value. */
14061 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14062 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14063 if (origin
== NULL
)
14065 /* This was a pre-DWARF-5 GNU extension alias
14066 for DW_AT_call_parameter. */
14067 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14069 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14071 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14073 sect_offset sect_off
14074 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14075 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14077 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14078 binding can be done only inside one CU. Such referenced DIE
14079 therefore cannot be even moved to DW_TAG_partial_unit. */
14080 complaint (_("DW_AT_call_parameter offset is not in CU for "
14081 "DW_TAG_call_site child DIE %s [in module %s]"),
14082 sect_offset_str (child_die
->sect_off
),
14083 objfile_name (objfile
));
14086 parameter
->u
.param_cu_off
14087 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14089 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14091 complaint (_("No DW_FORM_block* DW_AT_location for "
14092 "DW_TAG_call_site child DIE %s [in module %s]"),
14093 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14098 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14099 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14100 if (parameter
->u
.dwarf_reg
!= -1)
14101 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14102 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14103 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14104 ¶meter
->u
.fb_offset
))
14105 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14108 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
14109 "for DW_FORM_block* DW_AT_location is supported for "
14110 "DW_TAG_call_site child DIE %s "
14112 sect_offset_str (child_die
->sect_off
),
14113 objfile_name (objfile
));
14118 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14120 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14121 if (!attr_form_is_block (attr
))
14123 complaint (_("No DW_FORM_block* DW_AT_call_value for "
14124 "DW_TAG_call_site child DIE %s [in module %s]"),
14125 sect_offset_str (child_die
->sect_off
),
14126 objfile_name (objfile
));
14129 parameter
->value
= DW_BLOCK (attr
)->data
;
14130 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14132 /* Parameters are not pre-cleared by memset above. */
14133 parameter
->data_value
= NULL
;
14134 parameter
->data_value_size
= 0;
14135 call_site
->parameter_count
++;
14137 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14139 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14142 if (!attr_form_is_block (attr
))
14143 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
14144 "DW_TAG_call_site child DIE %s [in module %s]"),
14145 sect_offset_str (child_die
->sect_off
),
14146 objfile_name (objfile
));
14149 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14150 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14156 /* Helper function for read_variable. If DIE represents a virtual
14157 table, then return the type of the concrete object that is
14158 associated with the virtual table. Otherwise, return NULL. */
14160 static struct type
*
14161 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14163 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14167 /* Find the type DIE. */
14168 struct die_info
*type_die
= NULL
;
14169 struct dwarf2_cu
*type_cu
= cu
;
14171 if (attr_form_is_ref (attr
))
14172 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14173 if (type_die
== NULL
)
14176 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14178 return die_containing_type (type_die
, type_cu
);
14181 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14184 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14186 struct rust_vtable_symbol
*storage
= NULL
;
14188 if (cu
->language
== language_rust
)
14190 struct type
*containing_type
= rust_containing_type (die
, cu
);
14192 if (containing_type
!= NULL
)
14194 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14196 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14197 struct rust_vtable_symbol
);
14198 initialize_objfile_symbol (storage
);
14199 storage
->concrete_type
= containing_type
;
14200 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14204 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
14205 struct attribute
*abstract_origin
14206 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14207 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
14208 if (res
== NULL
&& loc
&& abstract_origin
)
14210 /* We have a variable without a name, but with a location and an abstract
14211 origin. This may be a concrete instance of an abstract variable
14212 referenced from an DW_OP_GNU_variable_value, so save it to find it back
14214 struct dwarf2_cu
*origin_cu
= cu
;
14215 struct die_info
*origin_die
14216 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
14217 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
14218 dpo
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
14222 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14223 reading .debug_rnglists.
14224 Callback's type should be:
14225 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14226 Return true if the attributes are present and valid, otherwise,
14229 template <typename Callback
>
14231 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14232 Callback
&&callback
)
14234 struct dwarf2_per_objfile
*dwarf2_per_objfile
14235 = cu
->per_cu
->dwarf2_per_objfile
;
14236 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14237 bfd
*obfd
= objfile
->obfd
;
14238 /* Base address selection entry. */
14241 const gdb_byte
*buffer
;
14242 CORE_ADDR baseaddr
;
14243 bool overflow
= false;
14245 found_base
= cu
->base_known
;
14246 base
= cu
->base_address
;
14248 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14249 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14251 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14255 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14257 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14261 /* Initialize it due to a false compiler warning. */
14262 CORE_ADDR range_beginning
= 0, range_end
= 0;
14263 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14264 + dwarf2_per_objfile
->rnglists
.size
);
14265 unsigned int bytes_read
;
14267 if (buffer
== buf_end
)
14272 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14275 case DW_RLE_end_of_list
:
14277 case DW_RLE_base_address
:
14278 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14283 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14285 buffer
+= bytes_read
;
14287 case DW_RLE_start_length
:
14288 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14293 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14294 buffer
+= bytes_read
;
14295 range_end
= (range_beginning
14296 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14297 buffer
+= bytes_read
;
14298 if (buffer
> buf_end
)
14304 case DW_RLE_offset_pair
:
14305 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14306 buffer
+= bytes_read
;
14307 if (buffer
> buf_end
)
14312 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14313 buffer
+= bytes_read
;
14314 if (buffer
> buf_end
)
14320 case DW_RLE_start_end
:
14321 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14326 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14327 buffer
+= bytes_read
;
14328 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14329 buffer
+= bytes_read
;
14332 complaint (_("Invalid .debug_rnglists data (no base address)"));
14335 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14337 if (rlet
== DW_RLE_base_address
)
14342 /* We have no valid base address for the ranges
14344 complaint (_("Invalid .debug_rnglists data (no base address)"));
14348 if (range_beginning
> range_end
)
14350 /* Inverted range entries are invalid. */
14351 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14355 /* Empty range entries have no effect. */
14356 if (range_beginning
== range_end
)
14359 range_beginning
+= base
;
14362 /* A not-uncommon case of bad debug info.
14363 Don't pollute the addrmap with bad data. */
14364 if (range_beginning
+ baseaddr
== 0
14365 && !dwarf2_per_objfile
->has_section_at_zero
)
14367 complaint (_(".debug_rnglists entry has start address of zero"
14368 " [in module %s]"), objfile_name (objfile
));
14372 callback (range_beginning
, range_end
);
14377 complaint (_("Offset %d is not terminated "
14378 "for DW_AT_ranges attribute"),
14386 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14387 Callback's type should be:
14388 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14389 Return 1 if the attributes are present and valid, otherwise, return 0. */
14391 template <typename Callback
>
14393 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14394 Callback
&&callback
)
14396 struct dwarf2_per_objfile
*dwarf2_per_objfile
14397 = cu
->per_cu
->dwarf2_per_objfile
;
14398 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14399 struct comp_unit_head
*cu_header
= &cu
->header
;
14400 bfd
*obfd
= objfile
->obfd
;
14401 unsigned int addr_size
= cu_header
->addr_size
;
14402 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14403 /* Base address selection entry. */
14406 unsigned int dummy
;
14407 const gdb_byte
*buffer
;
14408 CORE_ADDR baseaddr
;
14410 if (cu_header
->version
>= 5)
14411 return dwarf2_rnglists_process (offset
, cu
, callback
);
14413 found_base
= cu
->base_known
;
14414 base
= cu
->base_address
;
14416 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14417 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14419 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14423 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14425 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14429 CORE_ADDR range_beginning
, range_end
;
14431 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14432 buffer
+= addr_size
;
14433 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14434 buffer
+= addr_size
;
14435 offset
+= 2 * addr_size
;
14437 /* An end of list marker is a pair of zero addresses. */
14438 if (range_beginning
== 0 && range_end
== 0)
14439 /* Found the end of list entry. */
14442 /* Each base address selection entry is a pair of 2 values.
14443 The first is the largest possible address, the second is
14444 the base address. Check for a base address here. */
14445 if ((range_beginning
& mask
) == mask
)
14447 /* If we found the largest possible address, then we already
14448 have the base address in range_end. */
14456 /* We have no valid base address for the ranges
14458 complaint (_("Invalid .debug_ranges data (no base address)"));
14462 if (range_beginning
> range_end
)
14464 /* Inverted range entries are invalid. */
14465 complaint (_("Invalid .debug_ranges data (inverted range)"));
14469 /* Empty range entries have no effect. */
14470 if (range_beginning
== range_end
)
14473 range_beginning
+= base
;
14476 /* A not-uncommon case of bad debug info.
14477 Don't pollute the addrmap with bad data. */
14478 if (range_beginning
+ baseaddr
== 0
14479 && !dwarf2_per_objfile
->has_section_at_zero
)
14481 complaint (_(".debug_ranges entry has start address of zero"
14482 " [in module %s]"), objfile_name (objfile
));
14486 callback (range_beginning
, range_end
);
14492 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14493 Return 1 if the attributes are present and valid, otherwise, return 0.
14494 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14497 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14498 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14499 struct partial_symtab
*ranges_pst
)
14501 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14502 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14503 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14504 SECT_OFF_TEXT (objfile
));
14507 CORE_ADDR high
= 0;
14510 retval
= dwarf2_ranges_process (offset
, cu
,
14511 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14513 if (ranges_pst
!= NULL
)
14518 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14519 range_beginning
+ baseaddr
)
14521 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14522 range_end
+ baseaddr
)
14524 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
14525 lowpc
, highpc
- 1, ranges_pst
);
14528 /* FIXME: This is recording everything as a low-high
14529 segment of consecutive addresses. We should have a
14530 data structure for discontiguous block ranges
14534 low
= range_beginning
;
14540 if (range_beginning
< low
)
14541 low
= range_beginning
;
14542 if (range_end
> high
)
14550 /* If the first entry is an end-of-list marker, the range
14551 describes an empty scope, i.e. no instructions. */
14557 *high_return
= high
;
14561 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14562 definition for the return value. *LOWPC and *HIGHPC are set iff
14563 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14565 static enum pc_bounds_kind
14566 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14567 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14568 struct partial_symtab
*pst
)
14570 struct dwarf2_per_objfile
*dwarf2_per_objfile
14571 = cu
->per_cu
->dwarf2_per_objfile
;
14572 struct attribute
*attr
;
14573 struct attribute
*attr_high
;
14575 CORE_ADDR high
= 0;
14576 enum pc_bounds_kind ret
;
14578 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14581 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14584 low
= attr_value_as_address (attr
);
14585 high
= attr_value_as_address (attr_high
);
14586 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14590 /* Found high w/o low attribute. */
14591 return PC_BOUNDS_INVALID
;
14593 /* Found consecutive range of addresses. */
14594 ret
= PC_BOUNDS_HIGH_LOW
;
14598 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14601 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14602 We take advantage of the fact that DW_AT_ranges does not appear
14603 in DW_TAG_compile_unit of DWO files. */
14604 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14605 unsigned int ranges_offset
= (DW_UNSND (attr
)
14606 + (need_ranges_base
14610 /* Value of the DW_AT_ranges attribute is the offset in the
14611 .debug_ranges section. */
14612 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14613 return PC_BOUNDS_INVALID
;
14614 /* Found discontinuous range of addresses. */
14615 ret
= PC_BOUNDS_RANGES
;
14618 return PC_BOUNDS_NOT_PRESENT
;
14621 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14623 return PC_BOUNDS_INVALID
;
14625 /* When using the GNU linker, .gnu.linkonce. sections are used to
14626 eliminate duplicate copies of functions and vtables and such.
14627 The linker will arbitrarily choose one and discard the others.
14628 The AT_*_pc values for such functions refer to local labels in
14629 these sections. If the section from that file was discarded, the
14630 labels are not in the output, so the relocs get a value of 0.
14631 If this is a discarded function, mark the pc bounds as invalid,
14632 so that GDB will ignore it. */
14633 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14634 return PC_BOUNDS_INVALID
;
14642 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14643 its low and high PC addresses. Do nothing if these addresses could not
14644 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14645 and HIGHPC to the high address if greater than HIGHPC. */
14648 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14649 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14650 struct dwarf2_cu
*cu
)
14652 CORE_ADDR low
, high
;
14653 struct die_info
*child
= die
->child
;
14655 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14657 *lowpc
= std::min (*lowpc
, low
);
14658 *highpc
= std::max (*highpc
, high
);
14661 /* If the language does not allow nested subprograms (either inside
14662 subprograms or lexical blocks), we're done. */
14663 if (cu
->language
!= language_ada
)
14666 /* Check all the children of the given DIE. If it contains nested
14667 subprograms, then check their pc bounds. Likewise, we need to
14668 check lexical blocks as well, as they may also contain subprogram
14670 while (child
&& child
->tag
)
14672 if (child
->tag
== DW_TAG_subprogram
14673 || child
->tag
== DW_TAG_lexical_block
)
14674 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14675 child
= sibling_die (child
);
14679 /* Get the low and high pc's represented by the scope DIE, and store
14680 them in *LOWPC and *HIGHPC. If the correct values can't be
14681 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14684 get_scope_pc_bounds (struct die_info
*die
,
14685 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14686 struct dwarf2_cu
*cu
)
14688 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14689 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14690 CORE_ADDR current_low
, current_high
;
14692 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14693 >= PC_BOUNDS_RANGES
)
14695 best_low
= current_low
;
14696 best_high
= current_high
;
14700 struct die_info
*child
= die
->child
;
14702 while (child
&& child
->tag
)
14704 switch (child
->tag
) {
14705 case DW_TAG_subprogram
:
14706 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14708 case DW_TAG_namespace
:
14709 case DW_TAG_module
:
14710 /* FIXME: carlton/2004-01-16: Should we do this for
14711 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14712 that current GCC's always emit the DIEs corresponding
14713 to definitions of methods of classes as children of a
14714 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14715 the DIEs giving the declarations, which could be
14716 anywhere). But I don't see any reason why the
14717 standards says that they have to be there. */
14718 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14720 if (current_low
!= ((CORE_ADDR
) -1))
14722 best_low
= std::min (best_low
, current_low
);
14723 best_high
= std::max (best_high
, current_high
);
14731 child
= sibling_die (child
);
14736 *highpc
= best_high
;
14739 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14743 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14744 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14746 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14747 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14748 struct attribute
*attr
;
14749 struct attribute
*attr_high
;
14751 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14754 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14757 CORE_ADDR low
= attr_value_as_address (attr
);
14758 CORE_ADDR high
= attr_value_as_address (attr_high
);
14760 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14763 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14764 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14765 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14769 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14772 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14773 We take advantage of the fact that DW_AT_ranges does not appear
14774 in DW_TAG_compile_unit of DWO files. */
14775 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14777 /* The value of the DW_AT_ranges attribute is the offset of the
14778 address range list in the .debug_ranges section. */
14779 unsigned long offset
= (DW_UNSND (attr
)
14780 + (need_ranges_base
? cu
->ranges_base
: 0));
14782 std::vector
<blockrange
> blockvec
;
14783 dwarf2_ranges_process (offset
, cu
,
14784 [&] (CORE_ADDR start
, CORE_ADDR end
)
14788 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14789 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14790 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14791 blockvec
.emplace_back (start
, end
);
14794 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14798 /* Check whether the producer field indicates either of GCC < 4.6, or the
14799 Intel C/C++ compiler, and cache the result in CU. */
14802 check_producer (struct dwarf2_cu
*cu
)
14806 if (cu
->producer
== NULL
)
14808 /* For unknown compilers expect their behavior is DWARF version
14811 GCC started to support .debug_types sections by -gdwarf-4 since
14812 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14813 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14814 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14815 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14817 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14819 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14820 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14822 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14824 cu
->producer_is_icc
= true;
14825 cu
->producer_is_icc_lt_14
= major
< 14;
14827 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14828 cu
->producer_is_codewarrior
= true;
14831 /* For other non-GCC compilers, expect their behavior is DWARF version
14835 cu
->checked_producer
= true;
14838 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14839 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14840 during 4.6.0 experimental. */
14843 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14845 if (!cu
->checked_producer
)
14846 check_producer (cu
);
14848 return cu
->producer_is_gxx_lt_4_6
;
14852 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14853 with incorrect is_stmt attributes. */
14856 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14858 if (!cu
->checked_producer
)
14859 check_producer (cu
);
14861 return cu
->producer_is_codewarrior
;
14864 /* Return the default accessibility type if it is not overriden by
14865 DW_AT_accessibility. */
14867 static enum dwarf_access_attribute
14868 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14870 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14872 /* The default DWARF 2 accessibility for members is public, the default
14873 accessibility for inheritance is private. */
14875 if (die
->tag
!= DW_TAG_inheritance
)
14876 return DW_ACCESS_public
;
14878 return DW_ACCESS_private
;
14882 /* DWARF 3+ defines the default accessibility a different way. The same
14883 rules apply now for DW_TAG_inheritance as for the members and it only
14884 depends on the container kind. */
14886 if (die
->parent
->tag
== DW_TAG_class_type
)
14887 return DW_ACCESS_private
;
14889 return DW_ACCESS_public
;
14893 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14894 offset. If the attribute was not found return 0, otherwise return
14895 1. If it was found but could not properly be handled, set *OFFSET
14899 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14902 struct attribute
*attr
;
14904 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14909 /* Note that we do not check for a section offset first here.
14910 This is because DW_AT_data_member_location is new in DWARF 4,
14911 so if we see it, we can assume that a constant form is really
14912 a constant and not a section offset. */
14913 if (attr_form_is_constant (attr
))
14914 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
14915 else if (attr_form_is_section_offset (attr
))
14916 dwarf2_complex_location_expr_complaint ();
14917 else if (attr_form_is_block (attr
))
14918 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14920 dwarf2_complex_location_expr_complaint ();
14928 /* Add an aggregate field to the field list. */
14931 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14932 struct dwarf2_cu
*cu
)
14934 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14935 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14936 struct nextfield
*new_field
;
14937 struct attribute
*attr
;
14939 const char *fieldname
= "";
14941 if (die
->tag
== DW_TAG_inheritance
)
14943 fip
->baseclasses
.emplace_back ();
14944 new_field
= &fip
->baseclasses
.back ();
14948 fip
->fields
.emplace_back ();
14949 new_field
= &fip
->fields
.back ();
14954 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14956 new_field
->accessibility
= DW_UNSND (attr
);
14958 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14959 if (new_field
->accessibility
!= DW_ACCESS_public
)
14960 fip
->non_public_fields
= 1;
14962 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14964 new_field
->virtuality
= DW_UNSND (attr
);
14966 new_field
->virtuality
= DW_VIRTUALITY_none
;
14968 fp
= &new_field
->field
;
14970 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14974 /* Data member other than a C++ static data member. */
14976 /* Get type of field. */
14977 fp
->type
= die_type (die
, cu
);
14979 SET_FIELD_BITPOS (*fp
, 0);
14981 /* Get bit size of field (zero if none). */
14982 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14985 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14989 FIELD_BITSIZE (*fp
) = 0;
14992 /* Get bit offset of field. */
14993 if (handle_data_member_location (die
, cu
, &offset
))
14994 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14995 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14998 if (gdbarch_bits_big_endian (gdbarch
))
15000 /* For big endian bits, the DW_AT_bit_offset gives the
15001 additional bit offset from the MSB of the containing
15002 anonymous object to the MSB of the field. We don't
15003 have to do anything special since we don't need to
15004 know the size of the anonymous object. */
15005 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
15009 /* For little endian bits, compute the bit offset to the
15010 MSB of the anonymous object, subtract off the number of
15011 bits from the MSB of the field to the MSB of the
15012 object, and then subtract off the number of bits of
15013 the field itself. The result is the bit offset of
15014 the LSB of the field. */
15015 int anonymous_size
;
15016 int bit_offset
= DW_UNSND (attr
);
15018 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15021 /* The size of the anonymous object containing
15022 the bit field is explicit, so use the
15023 indicated size (in bytes). */
15024 anonymous_size
= DW_UNSND (attr
);
15028 /* The size of the anonymous object containing
15029 the bit field must be inferred from the type
15030 attribute of the data member containing the
15032 anonymous_size
= TYPE_LENGTH (fp
->type
);
15034 SET_FIELD_BITPOS (*fp
,
15035 (FIELD_BITPOS (*fp
)
15036 + anonymous_size
* bits_per_byte
15037 - bit_offset
- FIELD_BITSIZE (*fp
)));
15040 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15042 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15043 + dwarf2_get_attr_constant_value (attr
, 0)));
15045 /* Get name of field. */
15046 fieldname
= dwarf2_name (die
, cu
);
15047 if (fieldname
== NULL
)
15050 /* The name is already allocated along with this objfile, so we don't
15051 need to duplicate it for the type. */
15052 fp
->name
= fieldname
;
15054 /* Change accessibility for artificial fields (e.g. virtual table
15055 pointer or virtual base class pointer) to private. */
15056 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15058 FIELD_ARTIFICIAL (*fp
) = 1;
15059 new_field
->accessibility
= DW_ACCESS_private
;
15060 fip
->non_public_fields
= 1;
15063 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15065 /* C++ static member. */
15067 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15068 is a declaration, but all versions of G++ as of this writing
15069 (so through at least 3.2.1) incorrectly generate
15070 DW_TAG_variable tags. */
15072 const char *physname
;
15074 /* Get name of field. */
15075 fieldname
= dwarf2_name (die
, cu
);
15076 if (fieldname
== NULL
)
15079 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15081 /* Only create a symbol if this is an external value.
15082 new_symbol checks this and puts the value in the global symbol
15083 table, which we want. If it is not external, new_symbol
15084 will try to put the value in cu->list_in_scope which is wrong. */
15085 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15087 /* A static const member, not much different than an enum as far as
15088 we're concerned, except that we can support more types. */
15089 new_symbol (die
, NULL
, cu
);
15092 /* Get physical name. */
15093 physname
= dwarf2_physname (fieldname
, die
, cu
);
15095 /* The name is already allocated along with this objfile, so we don't
15096 need to duplicate it for the type. */
15097 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15098 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15099 FIELD_NAME (*fp
) = fieldname
;
15101 else if (die
->tag
== DW_TAG_inheritance
)
15105 /* C++ base class field. */
15106 if (handle_data_member_location (die
, cu
, &offset
))
15107 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15108 FIELD_BITSIZE (*fp
) = 0;
15109 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15110 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
15112 else if (die
->tag
== DW_TAG_variant_part
)
15114 /* process_structure_scope will treat this DIE as a union. */
15115 process_structure_scope (die
, cu
);
15117 /* The variant part is relative to the start of the enclosing
15119 SET_FIELD_BITPOS (*fp
, 0);
15120 fp
->type
= get_die_type (die
, cu
);
15121 fp
->artificial
= 1;
15122 fp
->name
= "<<variant>>";
15124 /* Normally a DW_TAG_variant_part won't have a size, but our
15125 representation requires one, so set it to the maximum of the
15127 if (TYPE_LENGTH (fp
->type
) == 0)
15130 for (int i
= 0; i
< TYPE_NFIELDS (fp
->type
); ++i
)
15131 if (TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
)) > max
)
15132 max
= TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
));
15133 TYPE_LENGTH (fp
->type
) = max
;
15137 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15140 /* Can the type given by DIE define another type? */
15143 type_can_define_types (const struct die_info
*die
)
15147 case DW_TAG_typedef
:
15148 case DW_TAG_class_type
:
15149 case DW_TAG_structure_type
:
15150 case DW_TAG_union_type
:
15151 case DW_TAG_enumeration_type
:
15159 /* Add a type definition defined in the scope of the FIP's class. */
15162 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15163 struct dwarf2_cu
*cu
)
15165 struct decl_field fp
;
15166 memset (&fp
, 0, sizeof (fp
));
15168 gdb_assert (type_can_define_types (die
));
15170 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15171 fp
.name
= dwarf2_name (die
, cu
);
15172 fp
.type
= read_type_die (die
, cu
);
15174 /* Save accessibility. */
15175 enum dwarf_access_attribute accessibility
;
15176 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15178 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15180 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15181 switch (accessibility
)
15183 case DW_ACCESS_public
:
15184 /* The assumed value if neither private nor protected. */
15186 case DW_ACCESS_private
:
15189 case DW_ACCESS_protected
:
15190 fp
.is_protected
= 1;
15193 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15196 if (die
->tag
== DW_TAG_typedef
)
15197 fip
->typedef_field_list
.push_back (fp
);
15199 fip
->nested_types_list
.push_back (fp
);
15202 /* Create the vector of fields, and attach it to the type. */
15205 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15206 struct dwarf2_cu
*cu
)
15208 int nfields
= fip
->nfields
;
15210 /* Record the field count, allocate space for the array of fields,
15211 and create blank accessibility bitfields if necessary. */
15212 TYPE_NFIELDS (type
) = nfields
;
15213 TYPE_FIELDS (type
) = (struct field
*)
15214 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15216 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15218 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15220 TYPE_FIELD_PRIVATE_BITS (type
) =
15221 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15222 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15224 TYPE_FIELD_PROTECTED_BITS (type
) =
15225 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15226 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15228 TYPE_FIELD_IGNORE_BITS (type
) =
15229 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15230 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15233 /* If the type has baseclasses, allocate and clear a bit vector for
15234 TYPE_FIELD_VIRTUAL_BITS. */
15235 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15237 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15238 unsigned char *pointer
;
15240 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15241 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15242 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15243 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15244 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15247 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15249 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15251 for (int index
= 0; index
< nfields
; ++index
)
15253 struct nextfield
&field
= fip
->fields
[index
];
15255 if (field
.variant
.is_discriminant
)
15256 di
->discriminant_index
= index
;
15257 else if (field
.variant
.default_branch
)
15258 di
->default_index
= index
;
15260 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15264 /* Copy the saved-up fields into the field vector. */
15265 for (int i
= 0; i
< nfields
; ++i
)
15267 struct nextfield
&field
15268 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15269 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15271 TYPE_FIELD (type
, i
) = field
.field
;
15272 switch (field
.accessibility
)
15274 case DW_ACCESS_private
:
15275 if (cu
->language
!= language_ada
)
15276 SET_TYPE_FIELD_PRIVATE (type
, i
);
15279 case DW_ACCESS_protected
:
15280 if (cu
->language
!= language_ada
)
15281 SET_TYPE_FIELD_PROTECTED (type
, i
);
15284 case DW_ACCESS_public
:
15288 /* Unknown accessibility. Complain and treat it as public. */
15290 complaint (_("unsupported accessibility %d"),
15291 field
.accessibility
);
15295 if (i
< fip
->baseclasses
.size ())
15297 switch (field
.virtuality
)
15299 case DW_VIRTUALITY_virtual
:
15300 case DW_VIRTUALITY_pure_virtual
:
15301 if (cu
->language
== language_ada
)
15302 error (_("unexpected virtuality in component of Ada type"));
15303 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15310 /* Return true if this member function is a constructor, false
15314 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15316 const char *fieldname
;
15317 const char *type_name
;
15320 if (die
->parent
== NULL
)
15323 if (die
->parent
->tag
!= DW_TAG_structure_type
15324 && die
->parent
->tag
!= DW_TAG_union_type
15325 && die
->parent
->tag
!= DW_TAG_class_type
)
15328 fieldname
= dwarf2_name (die
, cu
);
15329 type_name
= dwarf2_name (die
->parent
, cu
);
15330 if (fieldname
== NULL
|| type_name
== NULL
)
15333 len
= strlen (fieldname
);
15334 return (strncmp (fieldname
, type_name
, len
) == 0
15335 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15338 /* Add a member function to the proper fieldlist. */
15341 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15342 struct type
*type
, struct dwarf2_cu
*cu
)
15344 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15345 struct attribute
*attr
;
15347 struct fnfieldlist
*flp
= nullptr;
15348 struct fn_field
*fnp
;
15349 const char *fieldname
;
15350 struct type
*this_type
;
15351 enum dwarf_access_attribute accessibility
;
15353 if (cu
->language
== language_ada
)
15354 error (_("unexpected member function in Ada type"));
15356 /* Get name of member function. */
15357 fieldname
= dwarf2_name (die
, cu
);
15358 if (fieldname
== NULL
)
15361 /* Look up member function name in fieldlist. */
15362 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15364 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15366 flp
= &fip
->fnfieldlists
[i
];
15371 /* Create a new fnfieldlist if necessary. */
15372 if (flp
== nullptr)
15374 fip
->fnfieldlists
.emplace_back ();
15375 flp
= &fip
->fnfieldlists
.back ();
15376 flp
->name
= fieldname
;
15377 i
= fip
->fnfieldlists
.size () - 1;
15380 /* Create a new member function field and add it to the vector of
15382 flp
->fnfields
.emplace_back ();
15383 fnp
= &flp
->fnfields
.back ();
15385 /* Delay processing of the physname until later. */
15386 if (cu
->language
== language_cplus
)
15387 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15391 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15392 fnp
->physname
= physname
? physname
: "";
15395 fnp
->type
= alloc_type (objfile
);
15396 this_type
= read_type_die (die
, cu
);
15397 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15399 int nparams
= TYPE_NFIELDS (this_type
);
15401 /* TYPE is the domain of this method, and THIS_TYPE is the type
15402 of the method itself (TYPE_CODE_METHOD). */
15403 smash_to_method_type (fnp
->type
, type
,
15404 TYPE_TARGET_TYPE (this_type
),
15405 TYPE_FIELDS (this_type
),
15406 TYPE_NFIELDS (this_type
),
15407 TYPE_VARARGS (this_type
));
15409 /* Handle static member functions.
15410 Dwarf2 has no clean way to discern C++ static and non-static
15411 member functions. G++ helps GDB by marking the first
15412 parameter for non-static member functions (which is the this
15413 pointer) as artificial. We obtain this information from
15414 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15415 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15416 fnp
->voffset
= VOFFSET_STATIC
;
15419 complaint (_("member function type missing for '%s'"),
15420 dwarf2_full_name (fieldname
, die
, cu
));
15422 /* Get fcontext from DW_AT_containing_type if present. */
15423 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15424 fnp
->fcontext
= die_containing_type (die
, cu
);
15426 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15427 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15429 /* Get accessibility. */
15430 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15432 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15434 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15435 switch (accessibility
)
15437 case DW_ACCESS_private
:
15438 fnp
->is_private
= 1;
15440 case DW_ACCESS_protected
:
15441 fnp
->is_protected
= 1;
15445 /* Check for artificial methods. */
15446 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15447 if (attr
&& DW_UNSND (attr
) != 0)
15448 fnp
->is_artificial
= 1;
15450 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15452 /* Get index in virtual function table if it is a virtual member
15453 function. For older versions of GCC, this is an offset in the
15454 appropriate virtual table, as specified by DW_AT_containing_type.
15455 For everyone else, it is an expression to be evaluated relative
15456 to the object address. */
15458 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15461 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15463 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15465 /* Old-style GCC. */
15466 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15468 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15469 || (DW_BLOCK (attr
)->size
> 1
15470 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15471 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15473 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15474 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15475 dwarf2_complex_location_expr_complaint ();
15477 fnp
->voffset
/= cu
->header
.addr_size
;
15481 dwarf2_complex_location_expr_complaint ();
15483 if (!fnp
->fcontext
)
15485 /* If there is no `this' field and no DW_AT_containing_type,
15486 we cannot actually find a base class context for the
15488 if (TYPE_NFIELDS (this_type
) == 0
15489 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15491 complaint (_("cannot determine context for virtual member "
15492 "function \"%s\" (offset %s)"),
15493 fieldname
, sect_offset_str (die
->sect_off
));
15498 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15502 else if (attr_form_is_section_offset (attr
))
15504 dwarf2_complex_location_expr_complaint ();
15508 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15514 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15515 if (attr
&& DW_UNSND (attr
))
15517 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15518 complaint (_("Member function \"%s\" (offset %s) is virtual "
15519 "but the vtable offset is not specified"),
15520 fieldname
, sect_offset_str (die
->sect_off
));
15521 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15522 TYPE_CPLUS_DYNAMIC (type
) = 1;
15527 /* Create the vector of member function fields, and attach it to the type. */
15530 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15531 struct dwarf2_cu
*cu
)
15533 if (cu
->language
== language_ada
)
15534 error (_("unexpected member functions in Ada type"));
15536 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15537 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15539 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15541 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15543 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15544 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15546 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15547 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15548 fn_flp
->fn_fields
= (struct fn_field
*)
15549 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15551 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15552 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15555 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15558 /* Returns non-zero if NAME is the name of a vtable member in CU's
15559 language, zero otherwise. */
15561 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15563 static const char vptr
[] = "_vptr";
15565 /* Look for the C++ form of the vtable. */
15566 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15572 /* GCC outputs unnamed structures that are really pointers to member
15573 functions, with the ABI-specified layout. If TYPE describes
15574 such a structure, smash it into a member function type.
15576 GCC shouldn't do this; it should just output pointer to member DIEs.
15577 This is GCC PR debug/28767. */
15580 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15582 struct type
*pfn_type
, *self_type
, *new_type
;
15584 /* Check for a structure with no name and two children. */
15585 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15588 /* Check for __pfn and __delta members. */
15589 if (TYPE_FIELD_NAME (type
, 0) == NULL
15590 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15591 || TYPE_FIELD_NAME (type
, 1) == NULL
15592 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15595 /* Find the type of the method. */
15596 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15597 if (pfn_type
== NULL
15598 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15599 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15602 /* Look for the "this" argument. */
15603 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15604 if (TYPE_NFIELDS (pfn_type
) == 0
15605 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15606 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15609 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15610 new_type
= alloc_type (objfile
);
15611 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15612 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15613 TYPE_VARARGS (pfn_type
));
15614 smash_to_methodptr_type (type
, new_type
);
15617 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15618 appropriate error checking and issuing complaints if there is a
15622 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15624 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15626 if (attr
== nullptr)
15629 if (!attr_form_is_constant (attr
))
15631 complaint (_("DW_AT_alignment must have constant form"
15632 " - DIE at %s [in module %s]"),
15633 sect_offset_str (die
->sect_off
),
15634 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15639 if (attr
->form
== DW_FORM_sdata
)
15641 LONGEST val
= DW_SND (attr
);
15644 complaint (_("DW_AT_alignment value must not be negative"
15645 " - DIE at %s [in module %s]"),
15646 sect_offset_str (die
->sect_off
),
15647 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15653 align
= DW_UNSND (attr
);
15657 complaint (_("DW_AT_alignment value must not be zero"
15658 " - DIE at %s [in module %s]"),
15659 sect_offset_str (die
->sect_off
),
15660 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15663 if ((align
& (align
- 1)) != 0)
15665 complaint (_("DW_AT_alignment value must be a power of 2"
15666 " - DIE at %s [in module %s]"),
15667 sect_offset_str (die
->sect_off
),
15668 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15675 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15676 the alignment for TYPE. */
15679 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15682 if (!set_type_align (type
, get_alignment (cu
, die
)))
15683 complaint (_("DW_AT_alignment value too large"
15684 " - DIE at %s [in module %s]"),
15685 sect_offset_str (die
->sect_off
),
15686 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15689 /* Called when we find the DIE that starts a structure or union scope
15690 (definition) to create a type for the structure or union. Fill in
15691 the type's name and general properties; the members will not be
15692 processed until process_structure_scope. A symbol table entry for
15693 the type will also not be done until process_structure_scope (assuming
15694 the type has a name).
15696 NOTE: we need to call these functions regardless of whether or not the
15697 DIE has a DW_AT_name attribute, since it might be an anonymous
15698 structure or union. This gets the type entered into our set of
15699 user defined types. */
15701 static struct type
*
15702 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15704 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15706 struct attribute
*attr
;
15709 /* If the definition of this type lives in .debug_types, read that type.
15710 Don't follow DW_AT_specification though, that will take us back up
15711 the chain and we want to go down. */
15712 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15715 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15717 /* The type's CU may not be the same as CU.
15718 Ensure TYPE is recorded with CU in die_type_hash. */
15719 return set_die_type (die
, type
, cu
);
15722 type
= alloc_type (objfile
);
15723 INIT_CPLUS_SPECIFIC (type
);
15725 name
= dwarf2_name (die
, cu
);
15728 if (cu
->language
== language_cplus
15729 || cu
->language
== language_d
15730 || cu
->language
== language_rust
)
15732 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15734 /* dwarf2_full_name might have already finished building the DIE's
15735 type. If so, there is no need to continue. */
15736 if (get_die_type (die
, cu
) != NULL
)
15737 return get_die_type (die
, cu
);
15739 TYPE_NAME (type
) = full_name
;
15743 /* The name is already allocated along with this objfile, so
15744 we don't need to duplicate it for the type. */
15745 TYPE_NAME (type
) = name
;
15749 if (die
->tag
== DW_TAG_structure_type
)
15751 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15753 else if (die
->tag
== DW_TAG_union_type
)
15755 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15757 else if (die
->tag
== DW_TAG_variant_part
)
15759 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15760 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15764 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15767 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15768 TYPE_DECLARED_CLASS (type
) = 1;
15770 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15773 if (attr_form_is_constant (attr
))
15774 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15777 /* For the moment, dynamic type sizes are not supported
15778 by GDB's struct type. The actual size is determined
15779 on-demand when resolving the type of a given object,
15780 so set the type's length to zero for now. Otherwise,
15781 we record an expression as the length, and that expression
15782 could lead to a very large value, which could eventually
15783 lead to us trying to allocate that much memory when creating
15784 a value of that type. */
15785 TYPE_LENGTH (type
) = 0;
15790 TYPE_LENGTH (type
) = 0;
15793 maybe_set_alignment (cu
, die
, type
);
15795 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15797 /* ICC<14 does not output the required DW_AT_declaration on
15798 incomplete types, but gives them a size of zero. */
15799 TYPE_STUB (type
) = 1;
15802 TYPE_STUB_SUPPORTED (type
) = 1;
15804 if (die_is_declaration (die
, cu
))
15805 TYPE_STUB (type
) = 1;
15806 else if (attr
== NULL
&& die
->child
== NULL
15807 && producer_is_realview (cu
->producer
))
15808 /* RealView does not output the required DW_AT_declaration
15809 on incomplete types. */
15810 TYPE_STUB (type
) = 1;
15812 /* We need to add the type field to the die immediately so we don't
15813 infinitely recurse when dealing with pointers to the structure
15814 type within the structure itself. */
15815 set_die_type (die
, type
, cu
);
15817 /* set_die_type should be already done. */
15818 set_descriptive_type (type
, die
, cu
);
15823 /* A helper for process_structure_scope that handles a single member
15827 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15828 struct field_info
*fi
,
15829 std::vector
<struct symbol
*> *template_args
,
15830 struct dwarf2_cu
*cu
)
15832 if (child_die
->tag
== DW_TAG_member
15833 || child_die
->tag
== DW_TAG_variable
15834 || child_die
->tag
== DW_TAG_variant_part
)
15836 /* NOTE: carlton/2002-11-05: A C++ static data member
15837 should be a DW_TAG_member that is a declaration, but
15838 all versions of G++ as of this writing (so through at
15839 least 3.2.1) incorrectly generate DW_TAG_variable
15840 tags for them instead. */
15841 dwarf2_add_field (fi
, child_die
, cu
);
15843 else if (child_die
->tag
== DW_TAG_subprogram
)
15845 /* Rust doesn't have member functions in the C++ sense.
15846 However, it does emit ordinary functions as children
15847 of a struct DIE. */
15848 if (cu
->language
== language_rust
)
15849 read_func_scope (child_die
, cu
);
15852 /* C++ member function. */
15853 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15856 else if (child_die
->tag
== DW_TAG_inheritance
)
15858 /* C++ base class field. */
15859 dwarf2_add_field (fi
, child_die
, cu
);
15861 else if (type_can_define_types (child_die
))
15862 dwarf2_add_type_defn (fi
, child_die
, cu
);
15863 else if (child_die
->tag
== DW_TAG_template_type_param
15864 || child_die
->tag
== DW_TAG_template_value_param
)
15866 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15869 template_args
->push_back (arg
);
15871 else if (child_die
->tag
== DW_TAG_variant
)
15873 /* In a variant we want to get the discriminant and also add a
15874 field for our sole member child. */
15875 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15877 for (die_info
*variant_child
= child_die
->child
;
15878 variant_child
!= NULL
;
15879 variant_child
= sibling_die (variant_child
))
15881 if (variant_child
->tag
== DW_TAG_member
)
15883 handle_struct_member_die (variant_child
, type
, fi
,
15884 template_args
, cu
);
15885 /* Only handle the one. */
15890 /* We don't handle this but we might as well report it if we see
15892 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15893 complaint (_("DW_AT_discr_list is not supported yet"
15894 " - DIE at %s [in module %s]"),
15895 sect_offset_str (child_die
->sect_off
),
15896 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15898 /* The first field was just added, so we can stash the
15899 discriminant there. */
15900 gdb_assert (!fi
->fields
.empty ());
15902 fi
->fields
.back ().variant
.default_branch
= true;
15904 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15908 /* Finish creating a structure or union type, including filling in
15909 its members and creating a symbol for it. */
15912 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15914 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15915 struct die_info
*child_die
;
15918 type
= get_die_type (die
, cu
);
15920 type
= read_structure_type (die
, cu
);
15922 /* When reading a DW_TAG_variant_part, we need to notice when we
15923 read the discriminant member, so we can record it later in the
15924 discriminant_info. */
15925 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15926 sect_offset discr_offset
;
15927 bool has_template_parameters
= false;
15929 if (is_variant_part
)
15931 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15934 /* Maybe it's a univariant form, an extension we support.
15935 In this case arrange not to check the offset. */
15936 is_variant_part
= false;
15938 else if (attr_form_is_ref (discr
))
15940 struct dwarf2_cu
*target_cu
= cu
;
15941 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15943 discr_offset
= target_die
->sect_off
;
15947 complaint (_("DW_AT_discr does not have DIE reference form"
15948 " - DIE at %s [in module %s]"),
15949 sect_offset_str (die
->sect_off
),
15950 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15951 is_variant_part
= false;
15955 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15957 struct field_info fi
;
15958 std::vector
<struct symbol
*> template_args
;
15960 child_die
= die
->child
;
15962 while (child_die
&& child_die
->tag
)
15964 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15966 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
15967 fi
.fields
.back ().variant
.is_discriminant
= true;
15969 child_die
= sibling_die (child_die
);
15972 /* Attach template arguments to type. */
15973 if (!template_args
.empty ())
15975 has_template_parameters
= true;
15976 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15977 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15978 TYPE_TEMPLATE_ARGUMENTS (type
)
15979 = XOBNEWVEC (&objfile
->objfile_obstack
,
15981 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15982 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15983 template_args
.data (),
15984 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15985 * sizeof (struct symbol
*)));
15988 /* Attach fields and member functions to the type. */
15990 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15991 if (!fi
.fnfieldlists
.empty ())
15993 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15995 /* Get the type which refers to the base class (possibly this
15996 class itself) which contains the vtable pointer for the current
15997 class from the DW_AT_containing_type attribute. This use of
15998 DW_AT_containing_type is a GNU extension. */
16000 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
16002 struct type
*t
= die_containing_type (die
, cu
);
16004 set_type_vptr_basetype (type
, t
);
16009 /* Our own class provides vtbl ptr. */
16010 for (i
= TYPE_NFIELDS (t
) - 1;
16011 i
>= TYPE_N_BASECLASSES (t
);
16014 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
16016 if (is_vtable_name (fieldname
, cu
))
16018 set_type_vptr_fieldno (type
, i
);
16023 /* Complain if virtual function table field not found. */
16024 if (i
< TYPE_N_BASECLASSES (t
))
16025 complaint (_("virtual function table pointer "
16026 "not found when defining class '%s'"),
16027 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
16031 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16034 else if (cu
->producer
16035 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16037 /* The IBM XLC compiler does not provide direct indication
16038 of the containing type, but the vtable pointer is
16039 always named __vfp. */
16043 for (i
= TYPE_NFIELDS (type
) - 1;
16044 i
>= TYPE_N_BASECLASSES (type
);
16047 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16049 set_type_vptr_fieldno (type
, i
);
16050 set_type_vptr_basetype (type
, type
);
16057 /* Copy fi.typedef_field_list linked list elements content into the
16058 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16059 if (!fi
.typedef_field_list
.empty ())
16061 int count
= fi
.typedef_field_list
.size ();
16063 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16064 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16065 = ((struct decl_field
*)
16067 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16068 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16070 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16071 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16074 /* Copy fi.nested_types_list linked list elements content into the
16075 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16076 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16078 int count
= fi
.nested_types_list
.size ();
16080 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16081 TYPE_NESTED_TYPES_ARRAY (type
)
16082 = ((struct decl_field
*)
16083 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16084 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16086 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16087 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16091 quirk_gcc_member_function_pointer (type
, objfile
);
16092 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16093 cu
->rust_unions
.push_back (type
);
16095 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16096 snapshots) has been known to create a die giving a declaration
16097 for a class that has, as a child, a die giving a definition for a
16098 nested class. So we have to process our children even if the
16099 current die is a declaration. Normally, of course, a declaration
16100 won't have any children at all. */
16102 child_die
= die
->child
;
16104 while (child_die
!= NULL
&& child_die
->tag
)
16106 if (child_die
->tag
== DW_TAG_member
16107 || child_die
->tag
== DW_TAG_variable
16108 || child_die
->tag
== DW_TAG_inheritance
16109 || child_die
->tag
== DW_TAG_template_value_param
16110 || child_die
->tag
== DW_TAG_template_type_param
)
16115 process_die (child_die
, cu
);
16117 child_die
= sibling_die (child_die
);
16120 /* Do not consider external references. According to the DWARF standard,
16121 these DIEs are identified by the fact that they have no byte_size
16122 attribute, and a declaration attribute. */
16123 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16124 || !die_is_declaration (die
, cu
))
16126 struct symbol
*sym
= new_symbol (die
, type
, cu
);
16128 if (has_template_parameters
)
16130 struct symtab
*symtab
;
16131 if (sym
!= nullptr)
16132 symtab
= symbol_symtab (sym
);
16133 else if (cu
->line_header
!= nullptr)
16135 /* Any related symtab will do. */
16137 = cu
->line_header
->file_name_at (file_name_index (1))->symtab
;
16142 complaint (_("could not find suitable "
16143 "symtab for template parameter"
16144 " - DIE at %s [in module %s]"),
16145 sect_offset_str (die
->sect_off
),
16146 objfile_name (objfile
));
16149 if (symtab
!= nullptr)
16151 /* Make sure that the symtab is set on the new symbols.
16152 Even though they don't appear in this symtab directly,
16153 other parts of gdb assume that symbols do, and this is
16154 reasonably true. */
16155 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
16156 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
16162 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16163 update TYPE using some information only available in DIE's children. */
16166 update_enumeration_type_from_children (struct die_info
*die
,
16168 struct dwarf2_cu
*cu
)
16170 struct die_info
*child_die
;
16171 int unsigned_enum
= 1;
16175 auto_obstack obstack
;
16177 for (child_die
= die
->child
;
16178 child_die
!= NULL
&& child_die
->tag
;
16179 child_die
= sibling_die (child_die
))
16181 struct attribute
*attr
;
16183 const gdb_byte
*bytes
;
16184 struct dwarf2_locexpr_baton
*baton
;
16187 if (child_die
->tag
!= DW_TAG_enumerator
)
16190 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16194 name
= dwarf2_name (child_die
, cu
);
16196 name
= "<anonymous enumerator>";
16198 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16199 &value
, &bytes
, &baton
);
16205 else if ((mask
& value
) != 0)
16210 /* If we already know that the enum type is neither unsigned, nor
16211 a flag type, no need to look at the rest of the enumerates. */
16212 if (!unsigned_enum
&& !flag_enum
)
16217 TYPE_UNSIGNED (type
) = 1;
16219 TYPE_FLAG_ENUM (type
) = 1;
16222 /* Given a DW_AT_enumeration_type die, set its type. We do not
16223 complete the type's fields yet, or create any symbols. */
16225 static struct type
*
16226 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16228 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16230 struct attribute
*attr
;
16233 /* If the definition of this type lives in .debug_types, read that type.
16234 Don't follow DW_AT_specification though, that will take us back up
16235 the chain and we want to go down. */
16236 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16239 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16241 /* The type's CU may not be the same as CU.
16242 Ensure TYPE is recorded with CU in die_type_hash. */
16243 return set_die_type (die
, type
, cu
);
16246 type
= alloc_type (objfile
);
16248 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16249 name
= dwarf2_full_name (NULL
, die
, cu
);
16251 TYPE_NAME (type
) = name
;
16253 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16256 struct type
*underlying_type
= die_type (die
, cu
);
16258 TYPE_TARGET_TYPE (type
) = underlying_type
;
16261 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16264 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16268 TYPE_LENGTH (type
) = 0;
16271 maybe_set_alignment (cu
, die
, type
);
16273 /* The enumeration DIE can be incomplete. In Ada, any type can be
16274 declared as private in the package spec, and then defined only
16275 inside the package body. Such types are known as Taft Amendment
16276 Types. When another package uses such a type, an incomplete DIE
16277 may be generated by the compiler. */
16278 if (die_is_declaration (die
, cu
))
16279 TYPE_STUB (type
) = 1;
16281 /* Finish the creation of this type by using the enum's children.
16282 We must call this even when the underlying type has been provided
16283 so that we can determine if we're looking at a "flag" enum. */
16284 update_enumeration_type_from_children (die
, type
, cu
);
16286 /* If this type has an underlying type that is not a stub, then we
16287 may use its attributes. We always use the "unsigned" attribute
16288 in this situation, because ordinarily we guess whether the type
16289 is unsigned -- but the guess can be wrong and the underlying type
16290 can tell us the reality. However, we defer to a local size
16291 attribute if one exists, because this lets the compiler override
16292 the underlying type if needed. */
16293 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16295 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16296 if (TYPE_LENGTH (type
) == 0)
16297 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16298 if (TYPE_RAW_ALIGN (type
) == 0
16299 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16300 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16303 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16305 return set_die_type (die
, type
, cu
);
16308 /* Given a pointer to a die which begins an enumeration, process all
16309 the dies that define the members of the enumeration, and create the
16310 symbol for the enumeration type.
16312 NOTE: We reverse the order of the element list. */
16315 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16317 struct type
*this_type
;
16319 this_type
= get_die_type (die
, cu
);
16320 if (this_type
== NULL
)
16321 this_type
= read_enumeration_type (die
, cu
);
16323 if (die
->child
!= NULL
)
16325 struct die_info
*child_die
;
16326 struct symbol
*sym
;
16327 struct field
*fields
= NULL
;
16328 int num_fields
= 0;
16331 child_die
= die
->child
;
16332 while (child_die
&& child_die
->tag
)
16334 if (child_die
->tag
!= DW_TAG_enumerator
)
16336 process_die (child_die
, cu
);
16340 name
= dwarf2_name (child_die
, cu
);
16343 sym
= new_symbol (child_die
, this_type
, cu
);
16345 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16347 fields
= (struct field
*)
16349 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16350 * sizeof (struct field
));
16353 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16354 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16355 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16356 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16362 child_die
= sibling_die (child_die
);
16367 TYPE_NFIELDS (this_type
) = num_fields
;
16368 TYPE_FIELDS (this_type
) = (struct field
*)
16369 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16370 memcpy (TYPE_FIELDS (this_type
), fields
,
16371 sizeof (struct field
) * num_fields
);
16376 /* If we are reading an enum from a .debug_types unit, and the enum
16377 is a declaration, and the enum is not the signatured type in the
16378 unit, then we do not want to add a symbol for it. Adding a
16379 symbol would in some cases obscure the true definition of the
16380 enum, giving users an incomplete type when the definition is
16381 actually available. Note that we do not want to do this for all
16382 enums which are just declarations, because C++0x allows forward
16383 enum declarations. */
16384 if (cu
->per_cu
->is_debug_types
16385 && die_is_declaration (die
, cu
))
16387 struct signatured_type
*sig_type
;
16389 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16390 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16391 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16395 new_symbol (die
, this_type
, cu
);
16398 /* Extract all information from a DW_TAG_array_type DIE and put it in
16399 the DIE's type field. For now, this only handles one dimensional
16402 static struct type
*
16403 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16405 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16406 struct die_info
*child_die
;
16408 struct type
*element_type
, *range_type
, *index_type
;
16409 struct attribute
*attr
;
16411 struct dynamic_prop
*byte_stride_prop
= NULL
;
16412 unsigned int bit_stride
= 0;
16414 element_type
= die_type (die
, cu
);
16416 /* The die_type call above may have already set the type for this DIE. */
16417 type
= get_die_type (die
, cu
);
16421 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16425 struct type
*prop_type
16426 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
16429 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16430 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16434 complaint (_("unable to read array DW_AT_byte_stride "
16435 " - DIE at %s [in module %s]"),
16436 sect_offset_str (die
->sect_off
),
16437 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16438 /* Ignore this attribute. We will likely not be able to print
16439 arrays of this type correctly, but there is little we can do
16440 to help if we cannot read the attribute's value. */
16441 byte_stride_prop
= NULL
;
16445 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16447 bit_stride
= DW_UNSND (attr
);
16449 /* Irix 6.2 native cc creates array types without children for
16450 arrays with unspecified length. */
16451 if (die
->child
== NULL
)
16453 index_type
= objfile_type (objfile
)->builtin_int
;
16454 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16455 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16456 byte_stride_prop
, bit_stride
);
16457 return set_die_type (die
, type
, cu
);
16460 std::vector
<struct type
*> range_types
;
16461 child_die
= die
->child
;
16462 while (child_die
&& child_die
->tag
)
16464 if (child_die
->tag
== DW_TAG_subrange_type
)
16466 struct type
*child_type
= read_type_die (child_die
, cu
);
16468 if (child_type
!= NULL
)
16470 /* The range type was succesfully read. Save it for the
16471 array type creation. */
16472 range_types
.push_back (child_type
);
16475 child_die
= sibling_die (child_die
);
16478 /* Dwarf2 dimensions are output from left to right, create the
16479 necessary array types in backwards order. */
16481 type
= element_type
;
16483 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16487 while (i
< range_types
.size ())
16488 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16489 byte_stride_prop
, bit_stride
);
16493 size_t ndim
= range_types
.size ();
16495 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16496 byte_stride_prop
, bit_stride
);
16499 /* Understand Dwarf2 support for vector types (like they occur on
16500 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16501 array type. This is not part of the Dwarf2/3 standard yet, but a
16502 custom vendor extension. The main difference between a regular
16503 array and the vector variant is that vectors are passed by value
16505 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16507 make_vector_type (type
);
16509 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16510 implementation may choose to implement triple vectors using this
16512 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16515 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16516 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16518 complaint (_("DW_AT_byte_size for array type smaller "
16519 "than the total size of elements"));
16522 name
= dwarf2_name (die
, cu
);
16524 TYPE_NAME (type
) = name
;
16526 maybe_set_alignment (cu
, die
, type
);
16528 /* Install the type in the die. */
16529 set_die_type (die
, type
, cu
);
16531 /* set_die_type should be already done. */
16532 set_descriptive_type (type
, die
, cu
);
16537 static enum dwarf_array_dim_ordering
16538 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16540 struct attribute
*attr
;
16542 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16545 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16547 /* GNU F77 is a special case, as at 08/2004 array type info is the
16548 opposite order to the dwarf2 specification, but data is still
16549 laid out as per normal fortran.
16551 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16552 version checking. */
16554 if (cu
->language
== language_fortran
16555 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16557 return DW_ORD_row_major
;
16560 switch (cu
->language_defn
->la_array_ordering
)
16562 case array_column_major
:
16563 return DW_ORD_col_major
;
16564 case array_row_major
:
16566 return DW_ORD_row_major
;
16570 /* Extract all information from a DW_TAG_set_type DIE and put it in
16571 the DIE's type field. */
16573 static struct type
*
16574 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16576 struct type
*domain_type
, *set_type
;
16577 struct attribute
*attr
;
16579 domain_type
= die_type (die
, cu
);
16581 /* The die_type call above may have already set the type for this DIE. */
16582 set_type
= get_die_type (die
, cu
);
16586 set_type
= create_set_type (NULL
, domain_type
);
16588 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16590 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16592 maybe_set_alignment (cu
, die
, set_type
);
16594 return set_die_type (die
, set_type
, cu
);
16597 /* A helper for read_common_block that creates a locexpr baton.
16598 SYM is the symbol which we are marking as computed.
16599 COMMON_DIE is the DIE for the common block.
16600 COMMON_LOC is the location expression attribute for the common
16602 MEMBER_LOC is the location expression attribute for the particular
16603 member of the common block that we are processing.
16604 CU is the CU from which the above come. */
16607 mark_common_block_symbol_computed (struct symbol
*sym
,
16608 struct die_info
*common_die
,
16609 struct attribute
*common_loc
,
16610 struct attribute
*member_loc
,
16611 struct dwarf2_cu
*cu
)
16613 struct dwarf2_per_objfile
*dwarf2_per_objfile
16614 = cu
->per_cu
->dwarf2_per_objfile
;
16615 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16616 struct dwarf2_locexpr_baton
*baton
;
16618 unsigned int cu_off
;
16619 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16620 LONGEST offset
= 0;
16622 gdb_assert (common_loc
&& member_loc
);
16623 gdb_assert (attr_form_is_block (common_loc
));
16624 gdb_assert (attr_form_is_block (member_loc
)
16625 || attr_form_is_constant (member_loc
));
16627 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16628 baton
->per_cu
= cu
->per_cu
;
16629 gdb_assert (baton
->per_cu
);
16631 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16633 if (attr_form_is_constant (member_loc
))
16635 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16636 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16639 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16641 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16644 *ptr
++ = DW_OP_call4
;
16645 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16646 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16649 if (attr_form_is_constant (member_loc
))
16651 *ptr
++ = DW_OP_addr
;
16652 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16653 ptr
+= cu
->header
.addr_size
;
16657 /* We have to copy the data here, because DW_OP_call4 will only
16658 use a DW_AT_location attribute. */
16659 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16660 ptr
+= DW_BLOCK (member_loc
)->size
;
16663 *ptr
++ = DW_OP_plus
;
16664 gdb_assert (ptr
- baton
->data
== baton
->size
);
16666 SYMBOL_LOCATION_BATON (sym
) = baton
;
16667 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16670 /* Create appropriate locally-scoped variables for all the
16671 DW_TAG_common_block entries. Also create a struct common_block
16672 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16673 is used to sepate the common blocks name namespace from regular
16677 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16679 struct attribute
*attr
;
16681 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16684 /* Support the .debug_loc offsets. */
16685 if (attr_form_is_block (attr
))
16689 else if (attr_form_is_section_offset (attr
))
16691 dwarf2_complex_location_expr_complaint ();
16696 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16697 "common block member");
16702 if (die
->child
!= NULL
)
16704 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16705 struct die_info
*child_die
;
16706 size_t n_entries
= 0, size
;
16707 struct common_block
*common_block
;
16708 struct symbol
*sym
;
16710 for (child_die
= die
->child
;
16711 child_die
&& child_die
->tag
;
16712 child_die
= sibling_die (child_die
))
16715 size
= (sizeof (struct common_block
)
16716 + (n_entries
- 1) * sizeof (struct symbol
*));
16718 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16720 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16721 common_block
->n_entries
= 0;
16723 for (child_die
= die
->child
;
16724 child_die
&& child_die
->tag
;
16725 child_die
= sibling_die (child_die
))
16727 /* Create the symbol in the DW_TAG_common_block block in the current
16729 sym
= new_symbol (child_die
, NULL
, cu
);
16732 struct attribute
*member_loc
;
16734 common_block
->contents
[common_block
->n_entries
++] = sym
;
16736 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16740 /* GDB has handled this for a long time, but it is
16741 not specified by DWARF. It seems to have been
16742 emitted by gfortran at least as recently as:
16743 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16744 complaint (_("Variable in common block has "
16745 "DW_AT_data_member_location "
16746 "- DIE at %s [in module %s]"),
16747 sect_offset_str (child_die
->sect_off
),
16748 objfile_name (objfile
));
16750 if (attr_form_is_section_offset (member_loc
))
16751 dwarf2_complex_location_expr_complaint ();
16752 else if (attr_form_is_constant (member_loc
)
16753 || attr_form_is_block (member_loc
))
16756 mark_common_block_symbol_computed (sym
, die
, attr
,
16760 dwarf2_complex_location_expr_complaint ();
16765 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16766 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16770 /* Create a type for a C++ namespace. */
16772 static struct type
*
16773 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16775 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16776 const char *previous_prefix
, *name
;
16780 /* For extensions, reuse the type of the original namespace. */
16781 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16783 struct die_info
*ext_die
;
16784 struct dwarf2_cu
*ext_cu
= cu
;
16786 ext_die
= dwarf2_extension (die
, &ext_cu
);
16787 type
= read_type_die (ext_die
, ext_cu
);
16789 /* EXT_CU may not be the same as CU.
16790 Ensure TYPE is recorded with CU in die_type_hash. */
16791 return set_die_type (die
, type
, cu
);
16794 name
= namespace_name (die
, &is_anonymous
, cu
);
16796 /* Now build the name of the current namespace. */
16798 previous_prefix
= determine_prefix (die
, cu
);
16799 if (previous_prefix
[0] != '\0')
16800 name
= typename_concat (&objfile
->objfile_obstack
,
16801 previous_prefix
, name
, 0, cu
);
16803 /* Create the type. */
16804 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16806 return set_die_type (die
, type
, cu
);
16809 /* Read a namespace scope. */
16812 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16814 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16817 /* Add a symbol associated to this if we haven't seen the namespace
16818 before. Also, add a using directive if it's an anonymous
16821 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16825 type
= read_type_die (die
, cu
);
16826 new_symbol (die
, type
, cu
);
16828 namespace_name (die
, &is_anonymous
, cu
);
16831 const char *previous_prefix
= determine_prefix (die
, cu
);
16833 std::vector
<const char *> excludes
;
16834 add_using_directive (using_directives (cu
),
16835 previous_prefix
, TYPE_NAME (type
), NULL
,
16836 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16840 if (die
->child
!= NULL
)
16842 struct die_info
*child_die
= die
->child
;
16844 while (child_die
&& child_die
->tag
)
16846 process_die (child_die
, cu
);
16847 child_die
= sibling_die (child_die
);
16852 /* Read a Fortran module as type. This DIE can be only a declaration used for
16853 imported module. Still we need that type as local Fortran "use ... only"
16854 declaration imports depend on the created type in determine_prefix. */
16856 static struct type
*
16857 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16859 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16860 const char *module_name
;
16863 module_name
= dwarf2_name (die
, cu
);
16864 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16866 return set_die_type (die
, type
, cu
);
16869 /* Read a Fortran module. */
16872 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16874 struct die_info
*child_die
= die
->child
;
16877 type
= read_type_die (die
, cu
);
16878 new_symbol (die
, type
, cu
);
16880 while (child_die
&& child_die
->tag
)
16882 process_die (child_die
, cu
);
16883 child_die
= sibling_die (child_die
);
16887 /* Return the name of the namespace represented by DIE. Set
16888 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16891 static const char *
16892 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16894 struct die_info
*current_die
;
16895 const char *name
= NULL
;
16897 /* Loop through the extensions until we find a name. */
16899 for (current_die
= die
;
16900 current_die
!= NULL
;
16901 current_die
= dwarf2_extension (die
, &cu
))
16903 /* We don't use dwarf2_name here so that we can detect the absence
16904 of a name -> anonymous namespace. */
16905 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16911 /* Is it an anonymous namespace? */
16913 *is_anonymous
= (name
== NULL
);
16915 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16920 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16921 the user defined type vector. */
16923 static struct type
*
16924 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16926 struct gdbarch
*gdbarch
16927 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16928 struct comp_unit_head
*cu_header
= &cu
->header
;
16930 struct attribute
*attr_byte_size
;
16931 struct attribute
*attr_address_class
;
16932 int byte_size
, addr_class
;
16933 struct type
*target_type
;
16935 target_type
= die_type (die
, cu
);
16937 /* The die_type call above may have already set the type for this DIE. */
16938 type
= get_die_type (die
, cu
);
16942 type
= lookup_pointer_type (target_type
);
16944 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16945 if (attr_byte_size
)
16946 byte_size
= DW_UNSND (attr_byte_size
);
16948 byte_size
= cu_header
->addr_size
;
16950 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16951 if (attr_address_class
)
16952 addr_class
= DW_UNSND (attr_address_class
);
16954 addr_class
= DW_ADDR_none
;
16956 ULONGEST alignment
= get_alignment (cu
, die
);
16958 /* If the pointer size, alignment, or address class is different
16959 than the default, create a type variant marked as such and set
16960 the length accordingly. */
16961 if (TYPE_LENGTH (type
) != byte_size
16962 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16963 && alignment
!= TYPE_RAW_ALIGN (type
))
16964 || addr_class
!= DW_ADDR_none
)
16966 if (gdbarch_address_class_type_flags_p (gdbarch
))
16970 type_flags
= gdbarch_address_class_type_flags
16971 (gdbarch
, byte_size
, addr_class
);
16972 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16974 type
= make_type_with_address_space (type
, type_flags
);
16976 else if (TYPE_LENGTH (type
) != byte_size
)
16978 complaint (_("invalid pointer size %d"), byte_size
);
16980 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16982 complaint (_("Invalid DW_AT_alignment"
16983 " - DIE at %s [in module %s]"),
16984 sect_offset_str (die
->sect_off
),
16985 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16989 /* Should we also complain about unhandled address classes? */
16993 TYPE_LENGTH (type
) = byte_size
;
16994 set_type_align (type
, alignment
);
16995 return set_die_type (die
, type
, cu
);
16998 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16999 the user defined type vector. */
17001 static struct type
*
17002 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17005 struct type
*to_type
;
17006 struct type
*domain
;
17008 to_type
= die_type (die
, cu
);
17009 domain
= die_containing_type (die
, cu
);
17011 /* The calls above may have already set the type for this DIE. */
17012 type
= get_die_type (die
, cu
);
17016 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
17017 type
= lookup_methodptr_type (to_type
);
17018 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
17020 struct type
*new_type
17021 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
17023 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
17024 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
17025 TYPE_VARARGS (to_type
));
17026 type
= lookup_methodptr_type (new_type
);
17029 type
= lookup_memberptr_type (to_type
, domain
);
17031 return set_die_type (die
, type
, cu
);
17034 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
17035 the user defined type vector. */
17037 static struct type
*
17038 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17039 enum type_code refcode
)
17041 struct comp_unit_head
*cu_header
= &cu
->header
;
17042 struct type
*type
, *target_type
;
17043 struct attribute
*attr
;
17045 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17047 target_type
= die_type (die
, cu
);
17049 /* The die_type call above may have already set the type for this DIE. */
17050 type
= get_die_type (die
, cu
);
17054 type
= lookup_reference_type (target_type
, refcode
);
17055 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17058 TYPE_LENGTH (type
) = DW_UNSND (attr
);
17062 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17064 maybe_set_alignment (cu
, die
, type
);
17065 return set_die_type (die
, type
, cu
);
17068 /* Add the given cv-qualifiers to the element type of the array. GCC
17069 outputs DWARF type qualifiers that apply to an array, not the
17070 element type. But GDB relies on the array element type to carry
17071 the cv-qualifiers. This mimics section 6.7.3 of the C99
17074 static struct type
*
17075 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17076 struct type
*base_type
, int cnst
, int voltl
)
17078 struct type
*el_type
, *inner_array
;
17080 base_type
= copy_type (base_type
);
17081 inner_array
= base_type
;
17083 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
17085 TYPE_TARGET_TYPE (inner_array
) =
17086 copy_type (TYPE_TARGET_TYPE (inner_array
));
17087 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17090 el_type
= TYPE_TARGET_TYPE (inner_array
);
17091 cnst
|= TYPE_CONST (el_type
);
17092 voltl
|= TYPE_VOLATILE (el_type
);
17093 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17095 return set_die_type (die
, base_type
, cu
);
17098 static struct type
*
17099 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17101 struct type
*base_type
, *cv_type
;
17103 base_type
= die_type (die
, cu
);
17105 /* The die_type call above may have already set the type for this DIE. */
17106 cv_type
= get_die_type (die
, cu
);
17110 /* In case the const qualifier is applied to an array type, the element type
17111 is so qualified, not the array type (section 6.7.3 of C99). */
17112 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17113 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17115 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17116 return set_die_type (die
, cv_type
, cu
);
17119 static struct type
*
17120 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17122 struct type
*base_type
, *cv_type
;
17124 base_type
= die_type (die
, cu
);
17126 /* The die_type call above may have already set the type for this DIE. */
17127 cv_type
= get_die_type (die
, cu
);
17131 /* In case the volatile qualifier is applied to an array type, the
17132 element type is so qualified, not the array type (section 6.7.3
17134 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17135 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17137 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17138 return set_die_type (die
, cv_type
, cu
);
17141 /* Handle DW_TAG_restrict_type. */
17143 static struct type
*
17144 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17146 struct type
*base_type
, *cv_type
;
17148 base_type
= die_type (die
, cu
);
17150 /* The die_type call above may have already set the type for this DIE. */
17151 cv_type
= get_die_type (die
, cu
);
17155 cv_type
= make_restrict_type (base_type
);
17156 return set_die_type (die
, cv_type
, cu
);
17159 /* Handle DW_TAG_atomic_type. */
17161 static struct type
*
17162 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17164 struct type
*base_type
, *cv_type
;
17166 base_type
= die_type (die
, cu
);
17168 /* The die_type call above may have already set the type for this DIE. */
17169 cv_type
= get_die_type (die
, cu
);
17173 cv_type
= make_atomic_type (base_type
);
17174 return set_die_type (die
, cv_type
, cu
);
17177 /* Extract all information from a DW_TAG_string_type DIE and add to
17178 the user defined type vector. It isn't really a user defined type,
17179 but it behaves like one, with other DIE's using an AT_user_def_type
17180 attribute to reference it. */
17182 static struct type
*
17183 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17185 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17186 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17187 struct type
*type
, *range_type
, *index_type
, *char_type
;
17188 struct attribute
*attr
;
17189 unsigned int length
;
17191 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17194 length
= DW_UNSND (attr
);
17198 /* Check for the DW_AT_byte_size attribute. */
17199 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17202 length
= DW_UNSND (attr
);
17210 index_type
= objfile_type (objfile
)->builtin_int
;
17211 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17212 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17213 type
= create_string_type (NULL
, char_type
, range_type
);
17215 return set_die_type (die
, type
, cu
);
17218 /* Assuming that DIE corresponds to a function, returns nonzero
17219 if the function is prototyped. */
17222 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17224 struct attribute
*attr
;
17226 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17227 if (attr
&& (DW_UNSND (attr
) != 0))
17230 /* The DWARF standard implies that the DW_AT_prototyped attribute
17231 is only meaninful for C, but the concept also extends to other
17232 languages that allow unprototyped functions (Eg: Objective C).
17233 For all other languages, assume that functions are always
17235 if (cu
->language
!= language_c
17236 && cu
->language
!= language_objc
17237 && cu
->language
!= language_opencl
)
17240 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17241 prototyped and unprototyped functions; default to prototyped,
17242 since that is more common in modern code (and RealView warns
17243 about unprototyped functions). */
17244 if (producer_is_realview (cu
->producer
))
17250 /* Handle DIES due to C code like:
17254 int (*funcp)(int a, long l);
17258 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17260 static struct type
*
17261 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17263 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17264 struct type
*type
; /* Type that this function returns. */
17265 struct type
*ftype
; /* Function that returns above type. */
17266 struct attribute
*attr
;
17268 type
= die_type (die
, cu
);
17270 /* The die_type call above may have already set the type for this DIE. */
17271 ftype
= get_die_type (die
, cu
);
17275 ftype
= lookup_function_type (type
);
17277 if (prototyped_function_p (die
, cu
))
17278 TYPE_PROTOTYPED (ftype
) = 1;
17280 /* Store the calling convention in the type if it's available in
17281 the subroutine die. Otherwise set the calling convention to
17282 the default value DW_CC_normal. */
17283 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17285 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17286 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17287 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17289 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17291 /* Record whether the function returns normally to its caller or not
17292 if the DWARF producer set that information. */
17293 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17294 if (attr
&& (DW_UNSND (attr
) != 0))
17295 TYPE_NO_RETURN (ftype
) = 1;
17297 /* We need to add the subroutine type to the die immediately so
17298 we don't infinitely recurse when dealing with parameters
17299 declared as the same subroutine type. */
17300 set_die_type (die
, ftype
, cu
);
17302 if (die
->child
!= NULL
)
17304 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17305 struct die_info
*child_die
;
17306 int nparams
, iparams
;
17308 /* Count the number of parameters.
17309 FIXME: GDB currently ignores vararg functions, but knows about
17310 vararg member functions. */
17312 child_die
= die
->child
;
17313 while (child_die
&& child_die
->tag
)
17315 if (child_die
->tag
== DW_TAG_formal_parameter
)
17317 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17318 TYPE_VARARGS (ftype
) = 1;
17319 child_die
= sibling_die (child_die
);
17322 /* Allocate storage for parameters and fill them in. */
17323 TYPE_NFIELDS (ftype
) = nparams
;
17324 TYPE_FIELDS (ftype
) = (struct field
*)
17325 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17327 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17328 even if we error out during the parameters reading below. */
17329 for (iparams
= 0; iparams
< nparams
; iparams
++)
17330 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17333 child_die
= die
->child
;
17334 while (child_die
&& child_die
->tag
)
17336 if (child_die
->tag
== DW_TAG_formal_parameter
)
17338 struct type
*arg_type
;
17340 /* DWARF version 2 has no clean way to discern C++
17341 static and non-static member functions. G++ helps
17342 GDB by marking the first parameter for non-static
17343 member functions (which is the this pointer) as
17344 artificial. We pass this information to
17345 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17347 DWARF version 3 added DW_AT_object_pointer, which GCC
17348 4.5 does not yet generate. */
17349 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17351 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17353 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17354 arg_type
= die_type (child_die
, cu
);
17356 /* RealView does not mark THIS as const, which the testsuite
17357 expects. GCC marks THIS as const in method definitions,
17358 but not in the class specifications (GCC PR 43053). */
17359 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17360 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17363 struct dwarf2_cu
*arg_cu
= cu
;
17364 const char *name
= dwarf2_name (child_die
, cu
);
17366 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17369 /* If the compiler emits this, use it. */
17370 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17373 else if (name
&& strcmp (name
, "this") == 0)
17374 /* Function definitions will have the argument names. */
17376 else if (name
== NULL
&& iparams
== 0)
17377 /* Declarations may not have the names, so like
17378 elsewhere in GDB, assume an artificial first
17379 argument is "this". */
17383 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17387 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17390 child_die
= sibling_die (child_die
);
17397 static struct type
*
17398 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17400 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17401 const char *name
= NULL
;
17402 struct type
*this_type
, *target_type
;
17404 name
= dwarf2_full_name (NULL
, die
, cu
);
17405 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17406 TYPE_TARGET_STUB (this_type
) = 1;
17407 set_die_type (die
, this_type
, cu
);
17408 target_type
= die_type (die
, cu
);
17409 if (target_type
!= this_type
)
17410 TYPE_TARGET_TYPE (this_type
) = target_type
;
17413 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17414 spec and cause infinite loops in GDB. */
17415 complaint (_("Self-referential DW_TAG_typedef "
17416 "- DIE at %s [in module %s]"),
17417 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17418 TYPE_TARGET_TYPE (this_type
) = NULL
;
17423 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17424 (which may be different from NAME) to the architecture back-end to allow
17425 it to guess the correct format if necessary. */
17427 static struct type
*
17428 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17429 const char *name_hint
)
17431 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17432 const struct floatformat
**format
;
17435 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17437 type
= init_float_type (objfile
, bits
, name
, format
);
17439 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17444 /* Allocate an integer type of size BITS and name NAME. */
17446 static struct type
*
17447 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17448 int bits
, int unsigned_p
, const char *name
)
17452 /* Versions of Intel's C Compiler generate an integer type called "void"
17453 instead of using DW_TAG_unspecified_type. This has been seen on
17454 at least versions 14, 17, and 18. */
17455 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17456 && strcmp (name
, "void") == 0)
17457 type
= objfile_type (objfile
)->builtin_void
;
17459 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17464 /* Initialise and return a floating point type of size BITS suitable for
17465 use as a component of a complex number. The NAME_HINT is passed through
17466 when initialising the floating point type and is the name of the complex
17469 As DWARF doesn't currently provide an explicit name for the components
17470 of a complex number, but it can be helpful to have these components
17471 named, we try to select a suitable name based on the size of the
17473 static struct type
*
17474 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17475 struct objfile
*objfile
,
17476 int bits
, const char *name_hint
)
17478 gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17479 struct type
*tt
= nullptr;
17481 /* Try to find a suitable floating point builtin type of size BITS.
17482 We're going to use the name of this type as the name for the complex
17483 target type that we are about to create. */
17484 switch (cu
->language
)
17486 case language_fortran
:
17490 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17493 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17495 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17497 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17505 tt
= builtin_type (gdbarch
)->builtin_float
;
17508 tt
= builtin_type (gdbarch
)->builtin_double
;
17510 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17512 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17518 /* If the type we found doesn't match the size we were looking for, then
17519 pretend we didn't find a type at all, the complex target type we
17520 create will then be nameless. */
17521 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17524 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
17525 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
);
17528 /* Find a representation of a given base type and install
17529 it in the TYPE field of the die. */
17531 static struct type
*
17532 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17534 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17536 struct attribute
*attr
;
17537 int encoding
= 0, bits
= 0;
17540 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17543 encoding
= DW_UNSND (attr
);
17545 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17548 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17550 name
= dwarf2_name (die
, cu
);
17553 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17558 case DW_ATE_address
:
17559 /* Turn DW_ATE_address into a void * pointer. */
17560 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17561 type
= init_pointer_type (objfile
, bits
, name
, type
);
17563 case DW_ATE_boolean
:
17564 type
= init_boolean_type (objfile
, bits
, 1, name
);
17566 case DW_ATE_complex_float
:
17567 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
);
17568 type
= init_complex_type (objfile
, name
, type
);
17570 case DW_ATE_decimal_float
:
17571 type
= init_decfloat_type (objfile
, bits
, name
);
17574 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17576 case DW_ATE_signed
:
17577 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17579 case DW_ATE_unsigned
:
17580 if (cu
->language
== language_fortran
17582 && startswith (name
, "character("))
17583 type
= init_character_type (objfile
, bits
, 1, name
);
17585 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17587 case DW_ATE_signed_char
:
17588 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17589 || cu
->language
== language_pascal
17590 || cu
->language
== language_fortran
)
17591 type
= init_character_type (objfile
, bits
, 0, name
);
17593 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17595 case DW_ATE_unsigned_char
:
17596 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17597 || cu
->language
== language_pascal
17598 || cu
->language
== language_fortran
17599 || cu
->language
== language_rust
)
17600 type
= init_character_type (objfile
, bits
, 1, name
);
17602 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17606 gdbarch
*arch
= get_objfile_arch (objfile
);
17609 type
= builtin_type (arch
)->builtin_char16
;
17610 else if (bits
== 32)
17611 type
= builtin_type (arch
)->builtin_char32
;
17614 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17616 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17618 return set_die_type (die
, type
, cu
);
17623 complaint (_("unsupported DW_AT_encoding: '%s'"),
17624 dwarf_type_encoding_name (encoding
));
17625 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17629 if (name
&& strcmp (name
, "char") == 0)
17630 TYPE_NOSIGN (type
) = 1;
17632 maybe_set_alignment (cu
, die
, type
);
17634 return set_die_type (die
, type
, cu
);
17637 /* Parse dwarf attribute if it's a block, reference or constant and put the
17638 resulting value of the attribute into struct bound_prop.
17639 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17642 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17643 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17644 struct type
*default_type
)
17646 struct dwarf2_property_baton
*baton
;
17647 struct obstack
*obstack
17648 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17650 gdb_assert (default_type
!= NULL
);
17652 if (attr
== NULL
|| prop
== NULL
)
17655 if (attr_form_is_block (attr
))
17657 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17658 baton
->property_type
= default_type
;
17659 baton
->locexpr
.per_cu
= cu
->per_cu
;
17660 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17661 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17662 baton
->locexpr
.is_reference
= false;
17663 prop
->data
.baton
= baton
;
17664 prop
->kind
= PROP_LOCEXPR
;
17665 gdb_assert (prop
->data
.baton
!= NULL
);
17667 else if (attr_form_is_ref (attr
))
17669 struct dwarf2_cu
*target_cu
= cu
;
17670 struct die_info
*target_die
;
17671 struct attribute
*target_attr
;
17673 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17674 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17675 if (target_attr
== NULL
)
17676 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17678 if (target_attr
== NULL
)
17681 switch (target_attr
->name
)
17683 case DW_AT_location
:
17684 if (attr_form_is_section_offset (target_attr
))
17686 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17687 baton
->property_type
= die_type (target_die
, target_cu
);
17688 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17689 prop
->data
.baton
= baton
;
17690 prop
->kind
= PROP_LOCLIST
;
17691 gdb_assert (prop
->data
.baton
!= NULL
);
17693 else if (attr_form_is_block (target_attr
))
17695 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17696 baton
->property_type
= die_type (target_die
, target_cu
);
17697 baton
->locexpr
.per_cu
= cu
->per_cu
;
17698 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17699 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17700 baton
->locexpr
.is_reference
= true;
17701 prop
->data
.baton
= baton
;
17702 prop
->kind
= PROP_LOCEXPR
;
17703 gdb_assert (prop
->data
.baton
!= NULL
);
17707 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17708 "dynamic property");
17712 case DW_AT_data_member_location
:
17716 if (!handle_data_member_location (target_die
, target_cu
,
17720 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17721 baton
->property_type
= read_type_die (target_die
->parent
,
17723 baton
->offset_info
.offset
= offset
;
17724 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17725 prop
->data
.baton
= baton
;
17726 prop
->kind
= PROP_ADDR_OFFSET
;
17731 else if (attr_form_is_constant (attr
))
17733 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17734 prop
->kind
= PROP_CONST
;
17738 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17739 dwarf2_name (die
, cu
));
17746 /* Find an integer type the same size as the address size given in the
17747 compilation unit header for PER_CU. UNSIGNED_P controls if the integer
17748 is unsigned or not. */
17750 static struct type
*
17751 dwarf2_per_cu_addr_sized_int_type (struct dwarf2_per_cu_data
*per_cu
,
17754 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
17755 int addr_size
= dwarf2_per_cu_addr_size (per_cu
);
17756 struct type
*int_type
;
17758 /* Helper macro to examine the various builtin types. */
17759 #define TRY_TYPE(F) \
17760 int_type = (unsigned_p \
17761 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17762 : objfile_type (objfile)->builtin_ ## F); \
17763 if (int_type != NULL && TYPE_LENGTH (int_type) == addr_size) \
17770 TRY_TYPE (long_long
);
17774 gdb_assert_not_reached ("unable to find suitable integer type");
17777 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17778 present (which is valid) then compute the default type based on the
17779 compilation units address size. */
17781 static struct type
*
17782 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17784 struct type
*index_type
= die_type (die
, cu
);
17786 /* Dwarf-2 specifications explicitly allows to create subrange types
17787 without specifying a base type.
17788 In that case, the base type must be set to the type of
17789 the lower bound, upper bound or count, in that order, if any of these
17790 three attributes references an object that has a type.
17791 If no base type is found, the Dwarf-2 specifications say that
17792 a signed integer type of size equal to the size of an address should
17794 For the following C code: `extern char gdb_int [];'
17795 GCC produces an empty range DIE.
17796 FIXME: muller/2010-05-28: Possible references to object for low bound,
17797 high bound or count are not yet handled by this code. */
17798 if (TYPE_CODE (index_type
) == TYPE_CODE_VOID
)
17799 index_type
= dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
17804 /* Read the given DW_AT_subrange DIE. */
17806 static struct type
*
17807 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17809 struct type
*base_type
, *orig_base_type
;
17810 struct type
*range_type
;
17811 struct attribute
*attr
;
17812 struct dynamic_prop low
, high
;
17813 int low_default_is_valid
;
17814 int high_bound_is_count
= 0;
17816 ULONGEST negative_mask
;
17818 orig_base_type
= read_subrange_index_type (die
, cu
);
17820 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17821 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17822 creating the range type, but we use the result of check_typedef
17823 when examining properties of the type. */
17824 base_type
= check_typedef (orig_base_type
);
17826 /* The die_type call above may have already set the type for this DIE. */
17827 range_type
= get_die_type (die
, cu
);
17831 low
.kind
= PROP_CONST
;
17832 high
.kind
= PROP_CONST
;
17833 high
.data
.const_val
= 0;
17835 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17836 omitting DW_AT_lower_bound. */
17837 switch (cu
->language
)
17840 case language_cplus
:
17841 low
.data
.const_val
= 0;
17842 low_default_is_valid
= 1;
17844 case language_fortran
:
17845 low
.data
.const_val
= 1;
17846 low_default_is_valid
= 1;
17849 case language_objc
:
17850 case language_rust
:
17851 low
.data
.const_val
= 0;
17852 low_default_is_valid
= (cu
->header
.version
>= 4);
17856 case language_pascal
:
17857 low
.data
.const_val
= 1;
17858 low_default_is_valid
= (cu
->header
.version
>= 4);
17861 low
.data
.const_val
= 0;
17862 low_default_is_valid
= 0;
17866 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17868 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17869 else if (!low_default_is_valid
)
17870 complaint (_("Missing DW_AT_lower_bound "
17871 "- DIE at %s [in module %s]"),
17872 sect_offset_str (die
->sect_off
),
17873 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17875 struct attribute
*attr_ub
, *attr_count
;
17876 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17877 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17879 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17880 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17882 /* If bounds are constant do the final calculation here. */
17883 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17884 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17886 high_bound_is_count
= 1;
17890 if (attr_ub
!= NULL
)
17891 complaint (_("Unresolved DW_AT_upper_bound "
17892 "- DIE at %s [in module %s]"),
17893 sect_offset_str (die
->sect_off
),
17894 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17895 if (attr_count
!= NULL
)
17896 complaint (_("Unresolved DW_AT_count "
17897 "- DIE at %s [in module %s]"),
17898 sect_offset_str (die
->sect_off
),
17899 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17903 /* Normally, the DWARF producers are expected to use a signed
17904 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17905 But this is unfortunately not always the case, as witnessed
17906 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17907 is used instead. To work around that ambiguity, we treat
17908 the bounds as signed, and thus sign-extend their values, when
17909 the base type is signed. */
17911 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17912 if (low
.kind
== PROP_CONST
17913 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17914 low
.data
.const_val
|= negative_mask
;
17915 if (high
.kind
== PROP_CONST
17916 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17917 high
.data
.const_val
|= negative_mask
;
17919 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17921 if (high_bound_is_count
)
17922 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17924 /* Ada expects an empty array on no boundary attributes. */
17925 if (attr
== NULL
&& cu
->language
!= language_ada
)
17926 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17928 name
= dwarf2_name (die
, cu
);
17930 TYPE_NAME (range_type
) = name
;
17932 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17934 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17936 maybe_set_alignment (cu
, die
, range_type
);
17938 set_die_type (die
, range_type
, cu
);
17940 /* set_die_type should be already done. */
17941 set_descriptive_type (range_type
, die
, cu
);
17946 static struct type
*
17947 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17951 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17953 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17955 /* In Ada, an unspecified type is typically used when the description
17956 of the type is defered to a different unit. When encountering
17957 such a type, we treat it as a stub, and try to resolve it later on,
17959 if (cu
->language
== language_ada
)
17960 TYPE_STUB (type
) = 1;
17962 return set_die_type (die
, type
, cu
);
17965 /* Read a single die and all its descendents. Set the die's sibling
17966 field to NULL; set other fields in the die correctly, and set all
17967 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17968 location of the info_ptr after reading all of those dies. PARENT
17969 is the parent of the die in question. */
17971 static struct die_info
*
17972 read_die_and_children (const struct die_reader_specs
*reader
,
17973 const gdb_byte
*info_ptr
,
17974 const gdb_byte
**new_info_ptr
,
17975 struct die_info
*parent
)
17977 struct die_info
*die
;
17978 const gdb_byte
*cur_ptr
;
17981 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
17984 *new_info_ptr
= cur_ptr
;
17987 store_in_ref_table (die
, reader
->cu
);
17990 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17994 *new_info_ptr
= cur_ptr
;
17997 die
->sibling
= NULL
;
17998 die
->parent
= parent
;
18002 /* Read a die, all of its descendents, and all of its siblings; set
18003 all of the fields of all of the dies correctly. Arguments are as
18004 in read_die_and_children. */
18006 static struct die_info
*
18007 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
18008 const gdb_byte
*info_ptr
,
18009 const gdb_byte
**new_info_ptr
,
18010 struct die_info
*parent
)
18012 struct die_info
*first_die
, *last_sibling
;
18013 const gdb_byte
*cur_ptr
;
18015 cur_ptr
= info_ptr
;
18016 first_die
= last_sibling
= NULL
;
18020 struct die_info
*die
18021 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
18025 *new_info_ptr
= cur_ptr
;
18032 last_sibling
->sibling
= die
;
18034 last_sibling
= die
;
18038 /* Read a die, all of its descendents, and all of its siblings; set
18039 all of the fields of all of the dies correctly. Arguments are as
18040 in read_die_and_children.
18041 This the main entry point for reading a DIE and all its children. */
18043 static struct die_info
*
18044 read_die_and_siblings (const struct die_reader_specs
*reader
,
18045 const gdb_byte
*info_ptr
,
18046 const gdb_byte
**new_info_ptr
,
18047 struct die_info
*parent
)
18049 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
18050 new_info_ptr
, parent
);
18052 if (dwarf_die_debug
)
18054 fprintf_unfiltered (gdb_stdlog
,
18055 "Read die from %s@0x%x of %s:\n",
18056 get_section_name (reader
->die_section
),
18057 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18058 bfd_get_filename (reader
->abfd
));
18059 dump_die (die
, dwarf_die_debug
);
18065 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
18067 The caller is responsible for filling in the extra attributes
18068 and updating (*DIEP)->num_attrs.
18069 Set DIEP to point to a newly allocated die with its information,
18070 except for its child, sibling, and parent fields.
18071 Set HAS_CHILDREN to tell whether the die has children or not. */
18073 static const gdb_byte
*
18074 read_full_die_1 (const struct die_reader_specs
*reader
,
18075 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18076 int *has_children
, int num_extra_attrs
)
18078 unsigned int abbrev_number
, bytes_read
, i
;
18079 struct abbrev_info
*abbrev
;
18080 struct die_info
*die
;
18081 struct dwarf2_cu
*cu
= reader
->cu
;
18082 bfd
*abfd
= reader
->abfd
;
18084 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
18085 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18086 info_ptr
+= bytes_read
;
18087 if (!abbrev_number
)
18094 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
18096 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
18098 bfd_get_filename (abfd
));
18100 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
18101 die
->sect_off
= sect_off
;
18102 die
->tag
= abbrev
->tag
;
18103 die
->abbrev
= abbrev_number
;
18105 /* Make the result usable.
18106 The caller needs to update num_attrs after adding the extra
18108 die
->num_attrs
= abbrev
->num_attrs
;
18110 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18111 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
18115 *has_children
= abbrev
->has_children
;
18119 /* Read a die and all its attributes.
18120 Set DIEP to point to a newly allocated die with its information,
18121 except for its child, sibling, and parent fields.
18122 Set HAS_CHILDREN to tell whether the die has children or not. */
18124 static const gdb_byte
*
18125 read_full_die (const struct die_reader_specs
*reader
,
18126 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18129 const gdb_byte
*result
;
18131 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
18133 if (dwarf_die_debug
)
18135 fprintf_unfiltered (gdb_stdlog
,
18136 "Read die from %s@0x%x of %s:\n",
18137 get_section_name (reader
->die_section
),
18138 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18139 bfd_get_filename (reader
->abfd
));
18140 dump_die (*diep
, dwarf_die_debug
);
18146 /* Abbreviation tables.
18148 In DWARF version 2, the description of the debugging information is
18149 stored in a separate .debug_abbrev section. Before we read any
18150 dies from a section we read in all abbreviations and install them
18151 in a hash table. */
18153 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
18155 struct abbrev_info
*
18156 abbrev_table::alloc_abbrev ()
18158 struct abbrev_info
*abbrev
;
18160 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
18161 memset (abbrev
, 0, sizeof (struct abbrev_info
));
18166 /* Add an abbreviation to the table. */
18169 abbrev_table::add_abbrev (unsigned int abbrev_number
,
18170 struct abbrev_info
*abbrev
)
18172 unsigned int hash_number
;
18174 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18175 abbrev
->next
= m_abbrevs
[hash_number
];
18176 m_abbrevs
[hash_number
] = abbrev
;
18179 /* Look up an abbrev in the table.
18180 Returns NULL if the abbrev is not found. */
18182 struct abbrev_info
*
18183 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
18185 unsigned int hash_number
;
18186 struct abbrev_info
*abbrev
;
18188 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18189 abbrev
= m_abbrevs
[hash_number
];
18193 if (abbrev
->number
== abbrev_number
)
18195 abbrev
= abbrev
->next
;
18200 /* Read in an abbrev table. */
18202 static abbrev_table_up
18203 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18204 struct dwarf2_section_info
*section
,
18205 sect_offset sect_off
)
18207 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18208 bfd
*abfd
= get_section_bfd_owner (section
);
18209 const gdb_byte
*abbrev_ptr
;
18210 struct abbrev_info
*cur_abbrev
;
18211 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
18212 unsigned int abbrev_form
;
18213 struct attr_abbrev
*cur_attrs
;
18214 unsigned int allocated_attrs
;
18216 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
18218 dwarf2_read_section (objfile
, section
);
18219 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
18220 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18221 abbrev_ptr
+= bytes_read
;
18223 allocated_attrs
= ATTR_ALLOC_CHUNK
;
18224 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
18226 /* Loop until we reach an abbrev number of 0. */
18227 while (abbrev_number
)
18229 cur_abbrev
= abbrev_table
->alloc_abbrev ();
18231 /* read in abbrev header */
18232 cur_abbrev
->number
= abbrev_number
;
18234 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18235 abbrev_ptr
+= bytes_read
;
18236 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18239 /* now read in declarations */
18242 LONGEST implicit_const
;
18244 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18245 abbrev_ptr
+= bytes_read
;
18246 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18247 abbrev_ptr
+= bytes_read
;
18248 if (abbrev_form
== DW_FORM_implicit_const
)
18250 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18252 abbrev_ptr
+= bytes_read
;
18256 /* Initialize it due to a false compiler warning. */
18257 implicit_const
= -1;
18260 if (abbrev_name
== 0)
18263 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18265 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18267 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18270 cur_attrs
[cur_abbrev
->num_attrs
].name
18271 = (enum dwarf_attribute
) abbrev_name
;
18272 cur_attrs
[cur_abbrev
->num_attrs
].form
18273 = (enum dwarf_form
) abbrev_form
;
18274 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18275 ++cur_abbrev
->num_attrs
;
18278 cur_abbrev
->attrs
=
18279 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18280 cur_abbrev
->num_attrs
);
18281 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18282 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18284 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18286 /* Get next abbreviation.
18287 Under Irix6 the abbreviations for a compilation unit are not
18288 always properly terminated with an abbrev number of 0.
18289 Exit loop if we encounter an abbreviation which we have
18290 already read (which means we are about to read the abbreviations
18291 for the next compile unit) or if the end of the abbreviation
18292 table is reached. */
18293 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18295 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18296 abbrev_ptr
+= bytes_read
;
18297 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18302 return abbrev_table
;
18305 /* Returns nonzero if TAG represents a type that we might generate a partial
18309 is_type_tag_for_partial (int tag
)
18314 /* Some types that would be reasonable to generate partial symbols for,
18315 that we don't at present. */
18316 case DW_TAG_array_type
:
18317 case DW_TAG_file_type
:
18318 case DW_TAG_ptr_to_member_type
:
18319 case DW_TAG_set_type
:
18320 case DW_TAG_string_type
:
18321 case DW_TAG_subroutine_type
:
18323 case DW_TAG_base_type
:
18324 case DW_TAG_class_type
:
18325 case DW_TAG_interface_type
:
18326 case DW_TAG_enumeration_type
:
18327 case DW_TAG_structure_type
:
18328 case DW_TAG_subrange_type
:
18329 case DW_TAG_typedef
:
18330 case DW_TAG_union_type
:
18337 /* Load all DIEs that are interesting for partial symbols into memory. */
18339 static struct partial_die_info
*
18340 load_partial_dies (const struct die_reader_specs
*reader
,
18341 const gdb_byte
*info_ptr
, int building_psymtab
)
18343 struct dwarf2_cu
*cu
= reader
->cu
;
18344 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18345 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18346 unsigned int bytes_read
;
18347 unsigned int load_all
= 0;
18348 int nesting_level
= 1;
18353 gdb_assert (cu
->per_cu
!= NULL
);
18354 if (cu
->per_cu
->load_all_dies
)
18358 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18362 &cu
->comp_unit_obstack
,
18363 hashtab_obstack_allocate
,
18364 dummy_obstack_deallocate
);
18368 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18370 /* A NULL abbrev means the end of a series of children. */
18371 if (abbrev
== NULL
)
18373 if (--nesting_level
== 0)
18376 info_ptr
+= bytes_read
;
18377 last_die
= parent_die
;
18378 parent_die
= parent_die
->die_parent
;
18382 /* Check for template arguments. We never save these; if
18383 they're seen, we just mark the parent, and go on our way. */
18384 if (parent_die
!= NULL
18385 && cu
->language
== language_cplus
18386 && (abbrev
->tag
== DW_TAG_template_type_param
18387 || abbrev
->tag
== DW_TAG_template_value_param
))
18389 parent_die
->has_template_arguments
= 1;
18393 /* We don't need a partial DIE for the template argument. */
18394 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18399 /* We only recurse into c++ subprograms looking for template arguments.
18400 Skip their other children. */
18402 && cu
->language
== language_cplus
18403 && parent_die
!= NULL
18404 && parent_die
->tag
== DW_TAG_subprogram
)
18406 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18410 /* Check whether this DIE is interesting enough to save. Normally
18411 we would not be interested in members here, but there may be
18412 later variables referencing them via DW_AT_specification (for
18413 static members). */
18415 && !is_type_tag_for_partial (abbrev
->tag
)
18416 && abbrev
->tag
!= DW_TAG_constant
18417 && abbrev
->tag
!= DW_TAG_enumerator
18418 && abbrev
->tag
!= DW_TAG_subprogram
18419 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18420 && abbrev
->tag
!= DW_TAG_lexical_block
18421 && abbrev
->tag
!= DW_TAG_variable
18422 && abbrev
->tag
!= DW_TAG_namespace
18423 && abbrev
->tag
!= DW_TAG_module
18424 && abbrev
->tag
!= DW_TAG_member
18425 && abbrev
->tag
!= DW_TAG_imported_unit
18426 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18428 /* Otherwise we skip to the next sibling, if any. */
18429 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18433 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18436 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18438 /* This two-pass algorithm for processing partial symbols has a
18439 high cost in cache pressure. Thus, handle some simple cases
18440 here which cover the majority of C partial symbols. DIEs
18441 which neither have specification tags in them, nor could have
18442 specification tags elsewhere pointing at them, can simply be
18443 processed and discarded.
18445 This segment is also optional; scan_partial_symbols and
18446 add_partial_symbol will handle these DIEs if we chain
18447 them in normally. When compilers which do not emit large
18448 quantities of duplicate debug information are more common,
18449 this code can probably be removed. */
18451 /* Any complete simple types at the top level (pretty much all
18452 of them, for a language without namespaces), can be processed
18454 if (parent_die
== NULL
18455 && pdi
.has_specification
== 0
18456 && pdi
.is_declaration
== 0
18457 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18458 || pdi
.tag
== DW_TAG_base_type
18459 || pdi
.tag
== DW_TAG_subrange_type
))
18461 if (building_psymtab
&& pdi
.name
!= NULL
)
18462 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18463 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18464 psymbol_placement::STATIC
,
18465 0, cu
->language
, objfile
);
18466 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18470 /* The exception for DW_TAG_typedef with has_children above is
18471 a workaround of GCC PR debug/47510. In the case of this complaint
18472 type_name_or_error will error on such types later.
18474 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18475 it could not find the child DIEs referenced later, this is checked
18476 above. In correct DWARF DW_TAG_typedef should have no children. */
18478 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18479 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18480 "- DIE at %s [in module %s]"),
18481 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18483 /* If we're at the second level, and we're an enumerator, and
18484 our parent has no specification (meaning possibly lives in a
18485 namespace elsewhere), then we can add the partial symbol now
18486 instead of queueing it. */
18487 if (pdi
.tag
== DW_TAG_enumerator
18488 && parent_die
!= NULL
18489 && parent_die
->die_parent
== NULL
18490 && parent_die
->tag
== DW_TAG_enumeration_type
18491 && parent_die
->has_specification
== 0)
18493 if (pdi
.name
== NULL
)
18494 complaint (_("malformed enumerator DIE ignored"));
18495 else if (building_psymtab
)
18496 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18497 VAR_DOMAIN
, LOC_CONST
, -1,
18498 cu
->language
== language_cplus
18499 ? psymbol_placement::GLOBAL
18500 : psymbol_placement::STATIC
,
18501 0, cu
->language
, objfile
);
18503 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18507 struct partial_die_info
*part_die
18508 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18510 /* We'll save this DIE so link it in. */
18511 part_die
->die_parent
= parent_die
;
18512 part_die
->die_sibling
= NULL
;
18513 part_die
->die_child
= NULL
;
18515 if (last_die
&& last_die
== parent_die
)
18516 last_die
->die_child
= part_die
;
18518 last_die
->die_sibling
= part_die
;
18520 last_die
= part_die
;
18522 if (first_die
== NULL
)
18523 first_die
= part_die
;
18525 /* Maybe add the DIE to the hash table. Not all DIEs that we
18526 find interesting need to be in the hash table, because we
18527 also have the parent/sibling/child chains; only those that we
18528 might refer to by offset later during partial symbol reading.
18530 For now this means things that might have be the target of a
18531 DW_AT_specification, DW_AT_abstract_origin, or
18532 DW_AT_extension. DW_AT_extension will refer only to
18533 namespaces; DW_AT_abstract_origin refers to functions (and
18534 many things under the function DIE, but we do not recurse
18535 into function DIEs during partial symbol reading) and
18536 possibly variables as well; DW_AT_specification refers to
18537 declarations. Declarations ought to have the DW_AT_declaration
18538 flag. It happens that GCC forgets to put it in sometimes, but
18539 only for functions, not for types.
18541 Adding more things than necessary to the hash table is harmless
18542 except for the performance cost. Adding too few will result in
18543 wasted time in find_partial_die, when we reread the compilation
18544 unit with load_all_dies set. */
18547 || abbrev
->tag
== DW_TAG_constant
18548 || abbrev
->tag
== DW_TAG_subprogram
18549 || abbrev
->tag
== DW_TAG_variable
18550 || abbrev
->tag
== DW_TAG_namespace
18551 || part_die
->is_declaration
)
18555 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18556 to_underlying (part_die
->sect_off
),
18561 /* For some DIEs we want to follow their children (if any). For C
18562 we have no reason to follow the children of structures; for other
18563 languages we have to, so that we can get at method physnames
18564 to infer fully qualified class names, for DW_AT_specification,
18565 and for C++ template arguments. For C++, we also look one level
18566 inside functions to find template arguments (if the name of the
18567 function does not already contain the template arguments).
18569 For Ada, we need to scan the children of subprograms and lexical
18570 blocks as well because Ada allows the definition of nested
18571 entities that could be interesting for the debugger, such as
18572 nested subprograms for instance. */
18573 if (last_die
->has_children
18575 || last_die
->tag
== DW_TAG_namespace
18576 || last_die
->tag
== DW_TAG_module
18577 || last_die
->tag
== DW_TAG_enumeration_type
18578 || (cu
->language
== language_cplus
18579 && last_die
->tag
== DW_TAG_subprogram
18580 && (last_die
->name
== NULL
18581 || strchr (last_die
->name
, '<') == NULL
))
18582 || (cu
->language
!= language_c
18583 && (last_die
->tag
== DW_TAG_class_type
18584 || last_die
->tag
== DW_TAG_interface_type
18585 || last_die
->tag
== DW_TAG_structure_type
18586 || last_die
->tag
== DW_TAG_union_type
))
18587 || (cu
->language
== language_ada
18588 && (last_die
->tag
== DW_TAG_subprogram
18589 || last_die
->tag
== DW_TAG_lexical_block
))))
18592 parent_die
= last_die
;
18596 /* Otherwise we skip to the next sibling, if any. */
18597 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18599 /* Back to the top, do it again. */
18603 partial_die_info::partial_die_info (sect_offset sect_off_
,
18604 struct abbrev_info
*abbrev
)
18605 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18609 /* Read a minimal amount of information into the minimal die structure.
18610 INFO_PTR should point just after the initial uleb128 of a DIE. */
18613 partial_die_info::read (const struct die_reader_specs
*reader
,
18614 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18616 struct dwarf2_cu
*cu
= reader
->cu
;
18617 struct dwarf2_per_objfile
*dwarf2_per_objfile
18618 = cu
->per_cu
->dwarf2_per_objfile
;
18620 int has_low_pc_attr
= 0;
18621 int has_high_pc_attr
= 0;
18622 int high_pc_relative
= 0;
18624 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18626 struct attribute attr
;
18628 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18630 /* Store the data if it is of an attribute we want to keep in a
18631 partial symbol table. */
18637 case DW_TAG_compile_unit
:
18638 case DW_TAG_partial_unit
:
18639 case DW_TAG_type_unit
:
18640 /* Compilation units have a DW_AT_name that is a filename, not
18641 a source language identifier. */
18642 case DW_TAG_enumeration_type
:
18643 case DW_TAG_enumerator
:
18644 /* These tags always have simple identifiers already; no need
18645 to canonicalize them. */
18646 name
= DW_STRING (&attr
);
18650 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18653 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18654 &objfile
->per_bfd
->storage_obstack
);
18659 case DW_AT_linkage_name
:
18660 case DW_AT_MIPS_linkage_name
:
18661 /* Note that both forms of linkage name might appear. We
18662 assume they will be the same, and we only store the last
18664 linkage_name
= DW_STRING (&attr
);
18667 has_low_pc_attr
= 1;
18668 lowpc
= attr_value_as_address (&attr
);
18670 case DW_AT_high_pc
:
18671 has_high_pc_attr
= 1;
18672 highpc
= attr_value_as_address (&attr
);
18673 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18674 high_pc_relative
= 1;
18676 case DW_AT_location
:
18677 /* Support the .debug_loc offsets. */
18678 if (attr_form_is_block (&attr
))
18680 d
.locdesc
= DW_BLOCK (&attr
);
18682 else if (attr_form_is_section_offset (&attr
))
18684 dwarf2_complex_location_expr_complaint ();
18688 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18689 "partial symbol information");
18692 case DW_AT_external
:
18693 is_external
= DW_UNSND (&attr
);
18695 case DW_AT_declaration
:
18696 is_declaration
= DW_UNSND (&attr
);
18701 case DW_AT_abstract_origin
:
18702 case DW_AT_specification
:
18703 case DW_AT_extension
:
18704 has_specification
= 1;
18705 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18706 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18707 || cu
->per_cu
->is_dwz
);
18709 case DW_AT_sibling
:
18710 /* Ignore absolute siblings, they might point outside of
18711 the current compile unit. */
18712 if (attr
.form
== DW_FORM_ref_addr
)
18713 complaint (_("ignoring absolute DW_AT_sibling"));
18716 const gdb_byte
*buffer
= reader
->buffer
;
18717 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18718 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18720 if (sibling_ptr
< info_ptr
)
18721 complaint (_("DW_AT_sibling points backwards"));
18722 else if (sibling_ptr
> reader
->buffer_end
)
18723 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18725 sibling
= sibling_ptr
;
18728 case DW_AT_byte_size
:
18731 case DW_AT_const_value
:
18732 has_const_value
= 1;
18734 case DW_AT_calling_convention
:
18735 /* DWARF doesn't provide a way to identify a program's source-level
18736 entry point. DW_AT_calling_convention attributes are only meant
18737 to describe functions' calling conventions.
18739 However, because it's a necessary piece of information in
18740 Fortran, and before DWARF 4 DW_CC_program was the only
18741 piece of debugging information whose definition refers to
18742 a 'main program' at all, several compilers marked Fortran
18743 main programs with DW_CC_program --- even when those
18744 functions use the standard calling conventions.
18746 Although DWARF now specifies a way to provide this
18747 information, we support this practice for backward
18749 if (DW_UNSND (&attr
) == DW_CC_program
18750 && cu
->language
== language_fortran
)
18751 main_subprogram
= 1;
18754 if (DW_UNSND (&attr
) == DW_INL_inlined
18755 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18756 may_be_inlined
= 1;
18760 if (tag
== DW_TAG_imported_unit
)
18762 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18763 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18764 || cu
->per_cu
->is_dwz
);
18768 case DW_AT_main_subprogram
:
18769 main_subprogram
= DW_UNSND (&attr
);
18774 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18775 but that requires a full DIE, so instead we just
18777 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18778 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18779 + (need_ranges_base
18783 /* Value of the DW_AT_ranges attribute is the offset in the
18784 .debug_ranges section. */
18785 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18796 /* For Ada, if both the name and the linkage name appear, we prefer
18797 the latter. This lets "catch exception" work better, regardless
18798 of the order in which the name and linkage name were emitted.
18799 Really, though, this is just a workaround for the fact that gdb
18800 doesn't store both the name and the linkage name. */
18801 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18802 name
= linkage_name
;
18804 if (high_pc_relative
)
18807 if (has_low_pc_attr
&& has_high_pc_attr
)
18809 /* When using the GNU linker, .gnu.linkonce. sections are used to
18810 eliminate duplicate copies of functions and vtables and such.
18811 The linker will arbitrarily choose one and discard the others.
18812 The AT_*_pc values for such functions refer to local labels in
18813 these sections. If the section from that file was discarded, the
18814 labels are not in the output, so the relocs get a value of 0.
18815 If this is a discarded function, mark the pc bounds as invalid,
18816 so that GDB will ignore it. */
18817 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18819 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18820 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18822 complaint (_("DW_AT_low_pc %s is zero "
18823 "for DIE at %s [in module %s]"),
18824 paddress (gdbarch
, lowpc
),
18825 sect_offset_str (sect_off
),
18826 objfile_name (objfile
));
18828 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18829 else if (lowpc
>= highpc
)
18831 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18832 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18834 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18835 "for DIE at %s [in module %s]"),
18836 paddress (gdbarch
, lowpc
),
18837 paddress (gdbarch
, highpc
),
18838 sect_offset_str (sect_off
),
18839 objfile_name (objfile
));
18848 /* Find a cached partial DIE at OFFSET in CU. */
18850 struct partial_die_info
*
18851 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18853 struct partial_die_info
*lookup_die
= NULL
;
18854 struct partial_die_info
part_die (sect_off
);
18856 lookup_die
= ((struct partial_die_info
*)
18857 htab_find_with_hash (partial_dies
, &part_die
,
18858 to_underlying (sect_off
)));
18863 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18864 except in the case of .debug_types DIEs which do not reference
18865 outside their CU (they do however referencing other types via
18866 DW_FORM_ref_sig8). */
18868 static const struct cu_partial_die_info
18869 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18871 struct dwarf2_per_objfile
*dwarf2_per_objfile
18872 = cu
->per_cu
->dwarf2_per_objfile
;
18873 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18874 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18875 struct partial_die_info
*pd
= NULL
;
18877 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18878 && offset_in_cu_p (&cu
->header
, sect_off
))
18880 pd
= cu
->find_partial_die (sect_off
);
18883 /* We missed recording what we needed.
18884 Load all dies and try again. */
18885 per_cu
= cu
->per_cu
;
18889 /* TUs don't reference other CUs/TUs (except via type signatures). */
18890 if (cu
->per_cu
->is_debug_types
)
18892 error (_("Dwarf Error: Type Unit at offset %s contains"
18893 " external reference to offset %s [in module %s].\n"),
18894 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18895 bfd_get_filename (objfile
->obfd
));
18897 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18898 dwarf2_per_objfile
);
18900 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18901 load_partial_comp_unit (per_cu
);
18903 per_cu
->cu
->last_used
= 0;
18904 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18907 /* If we didn't find it, and not all dies have been loaded,
18908 load them all and try again. */
18910 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18912 per_cu
->load_all_dies
= 1;
18914 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18915 THIS_CU->cu may already be in use. So we can't just free it and
18916 replace its DIEs with the ones we read in. Instead, we leave those
18917 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18918 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18920 load_partial_comp_unit (per_cu
);
18922 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18926 internal_error (__FILE__
, __LINE__
,
18927 _("could not find partial DIE %s "
18928 "in cache [from module %s]\n"),
18929 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18930 return { per_cu
->cu
, pd
};
18933 /* See if we can figure out if the class lives in a namespace. We do
18934 this by looking for a member function; its demangled name will
18935 contain namespace info, if there is any. */
18938 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18939 struct dwarf2_cu
*cu
)
18941 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18942 what template types look like, because the demangler
18943 frequently doesn't give the same name as the debug info. We
18944 could fix this by only using the demangled name to get the
18945 prefix (but see comment in read_structure_type). */
18947 struct partial_die_info
*real_pdi
;
18948 struct partial_die_info
*child_pdi
;
18950 /* If this DIE (this DIE's specification, if any) has a parent, then
18951 we should not do this. We'll prepend the parent's fully qualified
18952 name when we create the partial symbol. */
18954 real_pdi
= struct_pdi
;
18955 while (real_pdi
->has_specification
)
18957 auto res
= find_partial_die (real_pdi
->spec_offset
,
18958 real_pdi
->spec_is_dwz
, cu
);
18959 real_pdi
= res
.pdi
;
18963 if (real_pdi
->die_parent
!= NULL
)
18966 for (child_pdi
= struct_pdi
->die_child
;
18968 child_pdi
= child_pdi
->die_sibling
)
18970 if (child_pdi
->tag
== DW_TAG_subprogram
18971 && child_pdi
->linkage_name
!= NULL
)
18973 char *actual_class_name
18974 = language_class_name_from_physname (cu
->language_defn
,
18975 child_pdi
->linkage_name
);
18976 if (actual_class_name
!= NULL
)
18978 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18980 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
18981 actual_class_name
);
18982 xfree (actual_class_name
);
18990 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18992 /* Once we've fixed up a die, there's no point in doing so again.
18993 This also avoids a memory leak if we were to call
18994 guess_partial_die_structure_name multiple times. */
18998 /* If we found a reference attribute and the DIE has no name, try
18999 to find a name in the referred to DIE. */
19001 if (name
== NULL
&& has_specification
)
19003 struct partial_die_info
*spec_die
;
19005 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
19006 spec_die
= res
.pdi
;
19009 spec_die
->fixup (cu
);
19011 if (spec_die
->name
)
19013 name
= spec_die
->name
;
19015 /* Copy DW_AT_external attribute if it is set. */
19016 if (spec_die
->is_external
)
19017 is_external
= spec_die
->is_external
;
19021 /* Set default names for some unnamed DIEs. */
19023 if (name
== NULL
&& tag
== DW_TAG_namespace
)
19024 name
= CP_ANONYMOUS_NAMESPACE_STR
;
19026 /* If there is no parent die to provide a namespace, and there are
19027 children, see if we can determine the namespace from their linkage
19029 if (cu
->language
== language_cplus
19030 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
19031 && die_parent
== NULL
19033 && (tag
== DW_TAG_class_type
19034 || tag
== DW_TAG_structure_type
19035 || tag
== DW_TAG_union_type
))
19036 guess_partial_die_structure_name (this, cu
);
19038 /* GCC might emit a nameless struct or union that has a linkage
19039 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19041 && (tag
== DW_TAG_class_type
19042 || tag
== DW_TAG_interface_type
19043 || tag
== DW_TAG_structure_type
19044 || tag
== DW_TAG_union_type
)
19045 && linkage_name
!= NULL
)
19049 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
19054 /* Strip any leading namespaces/classes, keep only the base name.
19055 DW_AT_name for named DIEs does not contain the prefixes. */
19056 base
= strrchr (demangled
, ':');
19057 if (base
&& base
> demangled
&& base
[-1] == ':')
19062 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19063 name
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
, base
);
19071 /* Read an attribute value described by an attribute form. */
19073 static const gdb_byte
*
19074 read_attribute_value (const struct die_reader_specs
*reader
,
19075 struct attribute
*attr
, unsigned form
,
19076 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
19078 struct dwarf2_cu
*cu
= reader
->cu
;
19079 struct dwarf2_per_objfile
*dwarf2_per_objfile
19080 = cu
->per_cu
->dwarf2_per_objfile
;
19081 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19082 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19083 bfd
*abfd
= reader
->abfd
;
19084 struct comp_unit_head
*cu_header
= &cu
->header
;
19085 unsigned int bytes_read
;
19086 struct dwarf_block
*blk
;
19088 attr
->form
= (enum dwarf_form
) form
;
19091 case DW_FORM_ref_addr
:
19092 if (cu
->header
.version
== 2)
19093 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
19095 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
19096 &cu
->header
, &bytes_read
);
19097 info_ptr
+= bytes_read
;
19099 case DW_FORM_GNU_ref_alt
:
19100 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19101 info_ptr
+= bytes_read
;
19104 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
19105 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
19106 info_ptr
+= bytes_read
;
19108 case DW_FORM_block2
:
19109 blk
= dwarf_alloc_block (cu
);
19110 blk
->size
= read_2_bytes (abfd
, info_ptr
);
19112 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19113 info_ptr
+= blk
->size
;
19114 DW_BLOCK (attr
) = blk
;
19116 case DW_FORM_block4
:
19117 blk
= dwarf_alloc_block (cu
);
19118 blk
->size
= read_4_bytes (abfd
, info_ptr
);
19120 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19121 info_ptr
+= blk
->size
;
19122 DW_BLOCK (attr
) = blk
;
19124 case DW_FORM_data2
:
19125 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
19128 case DW_FORM_data4
:
19129 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
19132 case DW_FORM_data8
:
19133 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
19136 case DW_FORM_data16
:
19137 blk
= dwarf_alloc_block (cu
);
19139 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19141 DW_BLOCK (attr
) = blk
;
19143 case DW_FORM_sec_offset
:
19144 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19145 info_ptr
+= bytes_read
;
19147 case DW_FORM_string
:
19148 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19149 DW_STRING_IS_CANONICAL (attr
) = 0;
19150 info_ptr
+= bytes_read
;
19153 if (!cu
->per_cu
->is_dwz
)
19155 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19156 abfd
, info_ptr
, cu_header
,
19158 DW_STRING_IS_CANONICAL (attr
) = 0;
19159 info_ptr
+= bytes_read
;
19163 case DW_FORM_line_strp
:
19164 if (!cu
->per_cu
->is_dwz
)
19166 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
19168 cu_header
, &bytes_read
);
19169 DW_STRING_IS_CANONICAL (attr
) = 0;
19170 info_ptr
+= bytes_read
;
19174 case DW_FORM_GNU_strp_alt
:
19176 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19177 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
19180 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
19182 DW_STRING_IS_CANONICAL (attr
) = 0;
19183 info_ptr
+= bytes_read
;
19186 case DW_FORM_exprloc
:
19187 case DW_FORM_block
:
19188 blk
= dwarf_alloc_block (cu
);
19189 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19190 info_ptr
+= bytes_read
;
19191 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19192 info_ptr
+= blk
->size
;
19193 DW_BLOCK (attr
) = blk
;
19195 case DW_FORM_block1
:
19196 blk
= dwarf_alloc_block (cu
);
19197 blk
->size
= read_1_byte (abfd
, info_ptr
);
19199 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19200 info_ptr
+= blk
->size
;
19201 DW_BLOCK (attr
) = blk
;
19203 case DW_FORM_data1
:
19204 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19208 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19211 case DW_FORM_flag_present
:
19212 DW_UNSND (attr
) = 1;
19214 case DW_FORM_sdata
:
19215 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19216 info_ptr
+= bytes_read
;
19218 case DW_FORM_udata
:
19219 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19220 info_ptr
+= bytes_read
;
19223 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19224 + read_1_byte (abfd
, info_ptr
));
19228 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19229 + read_2_bytes (abfd
, info_ptr
));
19233 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19234 + read_4_bytes (abfd
, info_ptr
));
19238 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19239 + read_8_bytes (abfd
, info_ptr
));
19242 case DW_FORM_ref_sig8
:
19243 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19246 case DW_FORM_ref_udata
:
19247 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19248 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19249 info_ptr
+= bytes_read
;
19251 case DW_FORM_indirect
:
19252 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19253 info_ptr
+= bytes_read
;
19254 if (form
== DW_FORM_implicit_const
)
19256 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19257 info_ptr
+= bytes_read
;
19259 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19262 case DW_FORM_implicit_const
:
19263 DW_SND (attr
) = implicit_const
;
19265 case DW_FORM_addrx
:
19266 case DW_FORM_GNU_addr_index
:
19267 if (reader
->dwo_file
== NULL
)
19269 /* For now flag a hard error.
19270 Later we can turn this into a complaint. */
19271 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19272 dwarf_form_name (form
),
19273 bfd_get_filename (abfd
));
19275 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19276 info_ptr
+= bytes_read
;
19279 case DW_FORM_strx1
:
19280 case DW_FORM_strx2
:
19281 case DW_FORM_strx3
:
19282 case DW_FORM_strx4
:
19283 case DW_FORM_GNU_str_index
:
19284 if (reader
->dwo_file
== NULL
)
19286 /* For now flag a hard error.
19287 Later we can turn this into a complaint if warranted. */
19288 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19289 dwarf_form_name (form
),
19290 bfd_get_filename (abfd
));
19293 ULONGEST str_index
;
19294 if (form
== DW_FORM_strx1
)
19296 str_index
= read_1_byte (abfd
, info_ptr
);
19299 else if (form
== DW_FORM_strx2
)
19301 str_index
= read_2_bytes (abfd
, info_ptr
);
19304 else if (form
== DW_FORM_strx3
)
19306 str_index
= read_3_bytes (abfd
, info_ptr
);
19309 else if (form
== DW_FORM_strx4
)
19311 str_index
= read_4_bytes (abfd
, info_ptr
);
19316 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19317 info_ptr
+= bytes_read
;
19319 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19320 DW_STRING_IS_CANONICAL (attr
) = 0;
19324 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19325 dwarf_form_name (form
),
19326 bfd_get_filename (abfd
));
19330 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19331 attr
->form
= DW_FORM_GNU_ref_alt
;
19333 /* We have seen instances where the compiler tried to emit a byte
19334 size attribute of -1 which ended up being encoded as an unsigned
19335 0xffffffff. Although 0xffffffff is technically a valid size value,
19336 an object of this size seems pretty unlikely so we can relatively
19337 safely treat these cases as if the size attribute was invalid and
19338 treat them as zero by default. */
19339 if (attr
->name
== DW_AT_byte_size
19340 && form
== DW_FORM_data4
19341 && DW_UNSND (attr
) >= 0xffffffff)
19344 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19345 hex_string (DW_UNSND (attr
)));
19346 DW_UNSND (attr
) = 0;
19352 /* Read an attribute described by an abbreviated attribute. */
19354 static const gdb_byte
*
19355 read_attribute (const struct die_reader_specs
*reader
,
19356 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19357 const gdb_byte
*info_ptr
)
19359 attr
->name
= abbrev
->name
;
19360 return read_attribute_value (reader
, attr
, abbrev
->form
,
19361 abbrev
->implicit_const
, info_ptr
);
19364 /* Read dwarf information from a buffer. */
19366 static unsigned int
19367 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19369 return bfd_get_8 (abfd
, buf
);
19373 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19375 return bfd_get_signed_8 (abfd
, buf
);
19378 static unsigned int
19379 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19381 return bfd_get_16 (abfd
, buf
);
19385 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19387 return bfd_get_signed_16 (abfd
, buf
);
19390 static unsigned int
19391 read_3_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19393 unsigned int result
= 0;
19394 for (int i
= 0; i
< 3; ++i
)
19396 unsigned char byte
= bfd_get_8 (abfd
, buf
);
19398 result
|= ((unsigned int) byte
<< (i
* 8));
19403 static unsigned int
19404 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19406 return bfd_get_32 (abfd
, buf
);
19410 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19412 return bfd_get_signed_32 (abfd
, buf
);
19416 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19418 return bfd_get_64 (abfd
, buf
);
19422 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19423 unsigned int *bytes_read
)
19425 struct comp_unit_head
*cu_header
= &cu
->header
;
19426 CORE_ADDR retval
= 0;
19428 if (cu_header
->signed_addr_p
)
19430 switch (cu_header
->addr_size
)
19433 retval
= bfd_get_signed_16 (abfd
, buf
);
19436 retval
= bfd_get_signed_32 (abfd
, buf
);
19439 retval
= bfd_get_signed_64 (abfd
, buf
);
19442 internal_error (__FILE__
, __LINE__
,
19443 _("read_address: bad switch, signed [in module %s]"),
19444 bfd_get_filename (abfd
));
19449 switch (cu_header
->addr_size
)
19452 retval
= bfd_get_16 (abfd
, buf
);
19455 retval
= bfd_get_32 (abfd
, buf
);
19458 retval
= bfd_get_64 (abfd
, buf
);
19461 internal_error (__FILE__
, __LINE__
,
19462 _("read_address: bad switch, "
19463 "unsigned [in module %s]"),
19464 bfd_get_filename (abfd
));
19468 *bytes_read
= cu_header
->addr_size
;
19472 /* Read the initial length from a section. The (draft) DWARF 3
19473 specification allows the initial length to take up either 4 bytes
19474 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19475 bytes describe the length and all offsets will be 8 bytes in length
19478 An older, non-standard 64-bit format is also handled by this
19479 function. The older format in question stores the initial length
19480 as an 8-byte quantity without an escape value. Lengths greater
19481 than 2^32 aren't very common which means that the initial 4 bytes
19482 is almost always zero. Since a length value of zero doesn't make
19483 sense for the 32-bit format, this initial zero can be considered to
19484 be an escape value which indicates the presence of the older 64-bit
19485 format. As written, the code can't detect (old format) lengths
19486 greater than 4GB. If it becomes necessary to handle lengths
19487 somewhat larger than 4GB, we could allow other small values (such
19488 as the non-sensical values of 1, 2, and 3) to also be used as
19489 escape values indicating the presence of the old format.
19491 The value returned via bytes_read should be used to increment the
19492 relevant pointer after calling read_initial_length().
19494 [ Note: read_initial_length() and read_offset() are based on the
19495 document entitled "DWARF Debugging Information Format", revision
19496 3, draft 8, dated November 19, 2001. This document was obtained
19499 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19501 This document is only a draft and is subject to change. (So beware.)
19503 Details regarding the older, non-standard 64-bit format were
19504 determined empirically by examining 64-bit ELF files produced by
19505 the SGI toolchain on an IRIX 6.5 machine.
19507 - Kevin, July 16, 2002
19511 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19513 LONGEST length
= bfd_get_32 (abfd
, buf
);
19515 if (length
== 0xffffffff)
19517 length
= bfd_get_64 (abfd
, buf
+ 4);
19520 else if (length
== 0)
19522 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19523 length
= bfd_get_64 (abfd
, buf
);
19534 /* Cover function for read_initial_length.
19535 Returns the length of the object at BUF, and stores the size of the
19536 initial length in *BYTES_READ and stores the size that offsets will be in
19538 If the initial length size is not equivalent to that specified in
19539 CU_HEADER then issue a complaint.
19540 This is useful when reading non-comp-unit headers. */
19543 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19544 const struct comp_unit_head
*cu_header
,
19545 unsigned int *bytes_read
,
19546 unsigned int *offset_size
)
19548 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19550 gdb_assert (cu_header
->initial_length_size
== 4
19551 || cu_header
->initial_length_size
== 8
19552 || cu_header
->initial_length_size
== 12);
19554 if (cu_header
->initial_length_size
!= *bytes_read
)
19555 complaint (_("intermixed 32-bit and 64-bit DWARF sections"));
19557 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19561 /* Read an offset from the data stream. The size of the offset is
19562 given by cu_header->offset_size. */
19565 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19566 const struct comp_unit_head
*cu_header
,
19567 unsigned int *bytes_read
)
19569 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19571 *bytes_read
= cu_header
->offset_size
;
19575 /* Read an offset from the data stream. */
19578 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19580 LONGEST retval
= 0;
19582 switch (offset_size
)
19585 retval
= bfd_get_32 (abfd
, buf
);
19588 retval
= bfd_get_64 (abfd
, buf
);
19591 internal_error (__FILE__
, __LINE__
,
19592 _("read_offset_1: bad switch [in module %s]"),
19593 bfd_get_filename (abfd
));
19599 static const gdb_byte
*
19600 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19602 /* If the size of a host char is 8 bits, we can return a pointer
19603 to the buffer, otherwise we have to copy the data to a buffer
19604 allocated on the temporary obstack. */
19605 gdb_assert (HOST_CHAR_BIT
== 8);
19609 static const char *
19610 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19611 unsigned int *bytes_read_ptr
)
19613 /* If the size of a host char is 8 bits, we can return a pointer
19614 to the string, otherwise we have to copy the string to a buffer
19615 allocated on the temporary obstack. */
19616 gdb_assert (HOST_CHAR_BIT
== 8);
19619 *bytes_read_ptr
= 1;
19622 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19623 return (const char *) buf
;
19626 /* Return pointer to string at section SECT offset STR_OFFSET with error
19627 reporting strings FORM_NAME and SECT_NAME. */
19629 static const char *
19630 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19631 bfd
*abfd
, LONGEST str_offset
,
19632 struct dwarf2_section_info
*sect
,
19633 const char *form_name
,
19634 const char *sect_name
)
19636 dwarf2_read_section (objfile
, sect
);
19637 if (sect
->buffer
== NULL
)
19638 error (_("%s used without %s section [in module %s]"),
19639 form_name
, sect_name
, bfd_get_filename (abfd
));
19640 if (str_offset
>= sect
->size
)
19641 error (_("%s pointing outside of %s section [in module %s]"),
19642 form_name
, sect_name
, bfd_get_filename (abfd
));
19643 gdb_assert (HOST_CHAR_BIT
== 8);
19644 if (sect
->buffer
[str_offset
] == '\0')
19646 return (const char *) (sect
->buffer
+ str_offset
);
19649 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19651 static const char *
19652 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19653 bfd
*abfd
, LONGEST str_offset
)
19655 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19657 &dwarf2_per_objfile
->str
,
19658 "DW_FORM_strp", ".debug_str");
19661 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19663 static const char *
19664 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19665 bfd
*abfd
, LONGEST str_offset
)
19667 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19669 &dwarf2_per_objfile
->line_str
,
19670 "DW_FORM_line_strp",
19671 ".debug_line_str");
19674 /* Read a string at offset STR_OFFSET in the .debug_str section from
19675 the .dwz file DWZ. Throw an error if the offset is too large. If
19676 the string consists of a single NUL byte, return NULL; otherwise
19677 return a pointer to the string. */
19679 static const char *
19680 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19681 LONGEST str_offset
)
19683 dwarf2_read_section (objfile
, &dwz
->str
);
19685 if (dwz
->str
.buffer
== NULL
)
19686 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19687 "section [in module %s]"),
19688 bfd_get_filename (dwz
->dwz_bfd
));
19689 if (str_offset
>= dwz
->str
.size
)
19690 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19691 ".debug_str section [in module %s]"),
19692 bfd_get_filename (dwz
->dwz_bfd
));
19693 gdb_assert (HOST_CHAR_BIT
== 8);
19694 if (dwz
->str
.buffer
[str_offset
] == '\0')
19696 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19699 /* Return pointer to string at .debug_str offset as read from BUF.
19700 BUF is assumed to be in a compilation unit described by CU_HEADER.
19701 Return *BYTES_READ_PTR count of bytes read from BUF. */
19703 static const char *
19704 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19705 const gdb_byte
*buf
,
19706 const struct comp_unit_head
*cu_header
,
19707 unsigned int *bytes_read_ptr
)
19709 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19711 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19714 /* Return pointer to string at .debug_line_str offset as read from BUF.
19715 BUF is assumed to be in a compilation unit described by CU_HEADER.
19716 Return *BYTES_READ_PTR count of bytes read from BUF. */
19718 static const char *
19719 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19720 bfd
*abfd
, const gdb_byte
*buf
,
19721 const struct comp_unit_head
*cu_header
,
19722 unsigned int *bytes_read_ptr
)
19724 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19726 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19731 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19732 unsigned int *bytes_read_ptr
)
19735 unsigned int num_read
;
19737 unsigned char byte
;
19744 byte
= bfd_get_8 (abfd
, buf
);
19747 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19748 if ((byte
& 128) == 0)
19754 *bytes_read_ptr
= num_read
;
19759 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19760 unsigned int *bytes_read_ptr
)
19763 int shift
, num_read
;
19764 unsigned char byte
;
19771 byte
= bfd_get_8 (abfd
, buf
);
19774 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19776 if ((byte
& 128) == 0)
19781 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19782 result
|= -(((ULONGEST
) 1) << shift
);
19783 *bytes_read_ptr
= num_read
;
19787 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19788 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19789 ADDR_SIZE is the size of addresses from the CU header. */
19792 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19793 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19795 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19796 bfd
*abfd
= objfile
->obfd
;
19797 const gdb_byte
*info_ptr
;
19799 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19800 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19801 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19802 objfile_name (objfile
));
19803 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19804 error (_("DW_FORM_addr_index pointing outside of "
19805 ".debug_addr section [in module %s]"),
19806 objfile_name (objfile
));
19807 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19808 + addr_base
+ addr_index
* addr_size
);
19809 if (addr_size
== 4)
19810 return bfd_get_32 (abfd
, info_ptr
);
19812 return bfd_get_64 (abfd
, info_ptr
);
19815 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19818 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19820 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19821 cu
->addr_base
, cu
->header
.addr_size
);
19824 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19827 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19828 unsigned int *bytes_read
)
19830 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19831 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19833 return read_addr_index (cu
, addr_index
);
19836 /* Data structure to pass results from dwarf2_read_addr_index_reader
19837 back to dwarf2_read_addr_index. */
19839 struct dwarf2_read_addr_index_data
19841 ULONGEST addr_base
;
19845 /* die_reader_func for dwarf2_read_addr_index. */
19848 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19849 const gdb_byte
*info_ptr
,
19850 struct die_info
*comp_unit_die
,
19854 struct dwarf2_cu
*cu
= reader
->cu
;
19855 struct dwarf2_read_addr_index_data
*aidata
=
19856 (struct dwarf2_read_addr_index_data
*) data
;
19858 aidata
->addr_base
= cu
->addr_base
;
19859 aidata
->addr_size
= cu
->header
.addr_size
;
19862 /* Given an index in .debug_addr, fetch the value.
19863 NOTE: This can be called during dwarf expression evaluation,
19864 long after the debug information has been read, and thus per_cu->cu
19865 may no longer exist. */
19868 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19869 unsigned int addr_index
)
19871 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19872 struct dwarf2_cu
*cu
= per_cu
->cu
;
19873 ULONGEST addr_base
;
19876 /* We need addr_base and addr_size.
19877 If we don't have PER_CU->cu, we have to get it.
19878 Nasty, but the alternative is storing the needed info in PER_CU,
19879 which at this point doesn't seem justified: it's not clear how frequently
19880 it would get used and it would increase the size of every PER_CU.
19881 Entry points like dwarf2_per_cu_addr_size do a similar thing
19882 so we're not in uncharted territory here.
19883 Alas we need to be a bit more complicated as addr_base is contained
19886 We don't need to read the entire CU(/TU).
19887 We just need the header and top level die.
19889 IWBN to use the aging mechanism to let us lazily later discard the CU.
19890 For now we skip this optimization. */
19894 addr_base
= cu
->addr_base
;
19895 addr_size
= cu
->header
.addr_size
;
19899 struct dwarf2_read_addr_index_data aidata
;
19901 /* Note: We can't use init_cutu_and_read_dies_simple here,
19902 we need addr_base. */
19903 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0, false,
19904 dwarf2_read_addr_index_reader
, &aidata
);
19905 addr_base
= aidata
.addr_base
;
19906 addr_size
= aidata
.addr_size
;
19909 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19913 /* Given a DW_FORM_GNU_str_index or DW_FORM_strx, fetch the string.
19914 This is only used by the Fission support. */
19916 static const char *
19917 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19919 struct dwarf2_cu
*cu
= reader
->cu
;
19920 struct dwarf2_per_objfile
*dwarf2_per_objfile
19921 = cu
->per_cu
->dwarf2_per_objfile
;
19922 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19923 const char *objf_name
= objfile_name (objfile
);
19924 bfd
*abfd
= objfile
->obfd
;
19925 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19926 struct dwarf2_section_info
*str_offsets_section
=
19927 &reader
->dwo_file
->sections
.str_offsets
;
19928 const gdb_byte
*info_ptr
;
19929 ULONGEST str_offset
;
19930 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19932 dwarf2_read_section (objfile
, str_section
);
19933 dwarf2_read_section (objfile
, str_offsets_section
);
19934 if (str_section
->buffer
== NULL
)
19935 error (_("%s used without .debug_str.dwo section"
19936 " in CU at offset %s [in module %s]"),
19937 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19938 if (str_offsets_section
->buffer
== NULL
)
19939 error (_("%s used without .debug_str_offsets.dwo section"
19940 " in CU at offset %s [in module %s]"),
19941 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19942 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
19943 error (_("%s pointing outside of .debug_str_offsets.dwo"
19944 " section in CU at offset %s [in module %s]"),
19945 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19946 info_ptr
= (str_offsets_section
->buffer
19947 + str_index
* cu
->header
.offset_size
);
19948 if (cu
->header
.offset_size
== 4)
19949 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19951 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19952 if (str_offset
>= str_section
->size
)
19953 error (_("Offset from %s pointing outside of"
19954 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19955 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19956 return (const char *) (str_section
->buffer
+ str_offset
);
19959 /* Return the length of an LEB128 number in BUF. */
19962 leb128_size (const gdb_byte
*buf
)
19964 const gdb_byte
*begin
= buf
;
19970 if ((byte
& 128) == 0)
19971 return buf
- begin
;
19976 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19985 cu
->language
= language_c
;
19988 case DW_LANG_C_plus_plus
:
19989 case DW_LANG_C_plus_plus_11
:
19990 case DW_LANG_C_plus_plus_14
:
19991 cu
->language
= language_cplus
;
19994 cu
->language
= language_d
;
19996 case DW_LANG_Fortran77
:
19997 case DW_LANG_Fortran90
:
19998 case DW_LANG_Fortran95
:
19999 case DW_LANG_Fortran03
:
20000 case DW_LANG_Fortran08
:
20001 cu
->language
= language_fortran
;
20004 cu
->language
= language_go
;
20006 case DW_LANG_Mips_Assembler
:
20007 cu
->language
= language_asm
;
20009 case DW_LANG_Ada83
:
20010 case DW_LANG_Ada95
:
20011 cu
->language
= language_ada
;
20013 case DW_LANG_Modula2
:
20014 cu
->language
= language_m2
;
20016 case DW_LANG_Pascal83
:
20017 cu
->language
= language_pascal
;
20020 cu
->language
= language_objc
;
20023 case DW_LANG_Rust_old
:
20024 cu
->language
= language_rust
;
20026 case DW_LANG_Cobol74
:
20027 case DW_LANG_Cobol85
:
20029 cu
->language
= language_minimal
;
20032 cu
->language_defn
= language_def (cu
->language
);
20035 /* Return the named attribute or NULL if not there. */
20037 static struct attribute
*
20038 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20043 struct attribute
*spec
= NULL
;
20045 for (i
= 0; i
< die
->num_attrs
; ++i
)
20047 if (die
->attrs
[i
].name
== name
)
20048 return &die
->attrs
[i
];
20049 if (die
->attrs
[i
].name
== DW_AT_specification
20050 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
20051 spec
= &die
->attrs
[i
];
20057 die
= follow_die_ref (die
, spec
, &cu
);
20063 /* Return the named attribute or NULL if not there,
20064 but do not follow DW_AT_specification, etc.
20065 This is for use in contexts where we're reading .debug_types dies.
20066 Following DW_AT_specification, DW_AT_abstract_origin will take us
20067 back up the chain, and we want to go down. */
20069 static struct attribute
*
20070 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
20074 for (i
= 0; i
< die
->num_attrs
; ++i
)
20075 if (die
->attrs
[i
].name
== name
)
20076 return &die
->attrs
[i
];
20081 /* Return the string associated with a string-typed attribute, or NULL if it
20082 is either not found or is of an incorrect type. */
20084 static const char *
20085 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20087 struct attribute
*attr
;
20088 const char *str
= NULL
;
20090 attr
= dwarf2_attr (die
, name
, cu
);
20094 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
20095 || attr
->form
== DW_FORM_string
20096 || attr
->form
== DW_FORM_strx
20097 || attr
->form
== DW_FORM_GNU_str_index
20098 || attr
->form
== DW_FORM_GNU_strp_alt
)
20099 str
= DW_STRING (attr
);
20101 complaint (_("string type expected for attribute %s for "
20102 "DIE at %s in module %s"),
20103 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
20104 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
20110 /* Return non-zero iff the attribute NAME is defined for the given DIE,
20111 and holds a non-zero value. This function should only be used for
20112 DW_FORM_flag or DW_FORM_flag_present attributes. */
20115 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
20117 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
20119 return (attr
&& DW_UNSND (attr
));
20123 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
20125 /* A DIE is a declaration if it has a DW_AT_declaration attribute
20126 which value is non-zero. However, we have to be careful with
20127 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
20128 (via dwarf2_flag_true_p) follows this attribute. So we may
20129 end up accidently finding a declaration attribute that belongs
20130 to a different DIE referenced by the specification attribute,
20131 even though the given DIE does not have a declaration attribute. */
20132 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
20133 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
20136 /* Return the die giving the specification for DIE, if there is
20137 one. *SPEC_CU is the CU containing DIE on input, and the CU
20138 containing the return value on output. If there is no
20139 specification, but there is an abstract origin, that is
20142 static struct die_info
*
20143 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
20145 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
20148 if (spec_attr
== NULL
)
20149 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
20151 if (spec_attr
== NULL
)
20154 return follow_die_ref (die
, spec_attr
, spec_cu
);
20157 /* Stub for free_line_header to match void * callback types. */
20160 free_line_header_voidp (void *arg
)
20162 struct line_header
*lh
= (struct line_header
*) arg
;
20168 line_header::add_include_dir (const char *include_dir
)
20170 if (dwarf_line_debug
>= 2)
20171 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
20172 include_dirs
.size () + 1, include_dir
);
20174 include_dirs
.push_back (include_dir
);
20178 line_header::add_file_name (const char *name
,
20180 unsigned int mod_time
,
20181 unsigned int length
)
20183 if (dwarf_line_debug
>= 2)
20184 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
20185 (unsigned) file_names
.size () + 1, name
);
20187 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
20190 /* A convenience function to find the proper .debug_line section for a CU. */
20192 static struct dwarf2_section_info
*
20193 get_debug_line_section (struct dwarf2_cu
*cu
)
20195 struct dwarf2_section_info
*section
;
20196 struct dwarf2_per_objfile
*dwarf2_per_objfile
20197 = cu
->per_cu
->dwarf2_per_objfile
;
20199 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
20201 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20202 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
20203 else if (cu
->per_cu
->is_dwz
)
20205 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
20207 section
= &dwz
->line
;
20210 section
= &dwarf2_per_objfile
->line
;
20215 /* Read directory or file name entry format, starting with byte of
20216 format count entries, ULEB128 pairs of entry formats, ULEB128 of
20217 entries count and the entries themselves in the described entry
20221 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
20222 bfd
*abfd
, const gdb_byte
**bufp
,
20223 struct line_header
*lh
,
20224 const struct comp_unit_head
*cu_header
,
20225 void (*callback
) (struct line_header
*lh
,
20228 unsigned int mod_time
,
20229 unsigned int length
))
20231 gdb_byte format_count
, formati
;
20232 ULONGEST data_count
, datai
;
20233 const gdb_byte
*buf
= *bufp
;
20234 const gdb_byte
*format_header_data
;
20235 unsigned int bytes_read
;
20237 format_count
= read_1_byte (abfd
, buf
);
20239 format_header_data
= buf
;
20240 for (formati
= 0; formati
< format_count
; formati
++)
20242 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20244 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20248 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20250 for (datai
= 0; datai
< data_count
; datai
++)
20252 const gdb_byte
*format
= format_header_data
;
20253 struct file_entry fe
;
20255 for (formati
= 0; formati
< format_count
; formati
++)
20257 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20258 format
+= bytes_read
;
20260 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20261 format
+= bytes_read
;
20263 gdb::optional
<const char *> string
;
20264 gdb::optional
<unsigned int> uint
;
20268 case DW_FORM_string
:
20269 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
20273 case DW_FORM_line_strp
:
20274 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
20281 case DW_FORM_data1
:
20282 uint
.emplace (read_1_byte (abfd
, buf
));
20286 case DW_FORM_data2
:
20287 uint
.emplace (read_2_bytes (abfd
, buf
));
20291 case DW_FORM_data4
:
20292 uint
.emplace (read_4_bytes (abfd
, buf
));
20296 case DW_FORM_data8
:
20297 uint
.emplace (read_8_bytes (abfd
, buf
));
20301 case DW_FORM_udata
:
20302 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20306 case DW_FORM_block
:
20307 /* It is valid only for DW_LNCT_timestamp which is ignored by
20312 switch (content_type
)
20315 if (string
.has_value ())
20318 case DW_LNCT_directory_index
:
20319 if (uint
.has_value ())
20320 fe
.d_index
= (dir_index
) *uint
;
20322 case DW_LNCT_timestamp
:
20323 if (uint
.has_value ())
20324 fe
.mod_time
= *uint
;
20327 if (uint
.has_value ())
20333 complaint (_("Unknown format content type %s"),
20334 pulongest (content_type
));
20338 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20344 /* Read the statement program header starting at OFFSET in
20345 .debug_line, or .debug_line.dwo. Return a pointer
20346 to a struct line_header, allocated using xmalloc.
20347 Returns NULL if there is a problem reading the header, e.g., if it
20348 has a version we don't understand.
20350 NOTE: the strings in the include directory and file name tables of
20351 the returned object point into the dwarf line section buffer,
20352 and must not be freed. */
20354 static line_header_up
20355 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20357 const gdb_byte
*line_ptr
;
20358 unsigned int bytes_read
, offset_size
;
20360 const char *cur_dir
, *cur_file
;
20361 struct dwarf2_section_info
*section
;
20363 struct dwarf2_per_objfile
*dwarf2_per_objfile
20364 = cu
->per_cu
->dwarf2_per_objfile
;
20366 section
= get_debug_line_section (cu
);
20367 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20368 if (section
->buffer
== NULL
)
20370 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20371 complaint (_("missing .debug_line.dwo section"));
20373 complaint (_("missing .debug_line section"));
20377 /* We can't do this until we know the section is non-empty.
20378 Only then do we know we have such a section. */
20379 abfd
= get_section_bfd_owner (section
);
20381 /* Make sure that at least there's room for the total_length field.
20382 That could be 12 bytes long, but we're just going to fudge that. */
20383 if (to_underlying (sect_off
) + 4 >= section
->size
)
20385 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20389 line_header_up
lh (new line_header ());
20391 lh
->sect_off
= sect_off
;
20392 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20394 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20396 /* Read in the header. */
20398 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20399 &bytes_read
, &offset_size
);
20400 line_ptr
+= bytes_read
;
20401 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20403 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20406 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20407 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20409 if (lh
->version
> 5)
20411 /* This is a version we don't understand. The format could have
20412 changed in ways we don't handle properly so just punt. */
20413 complaint (_("unsupported version in .debug_line section"));
20416 if (lh
->version
>= 5)
20418 gdb_byte segment_selector_size
;
20420 /* Skip address size. */
20421 read_1_byte (abfd
, line_ptr
);
20424 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20426 if (segment_selector_size
!= 0)
20428 complaint (_("unsupported segment selector size %u "
20429 "in .debug_line section"),
20430 segment_selector_size
);
20434 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20435 line_ptr
+= offset_size
;
20436 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20438 if (lh
->version
>= 4)
20440 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20444 lh
->maximum_ops_per_instruction
= 1;
20446 if (lh
->maximum_ops_per_instruction
== 0)
20448 lh
->maximum_ops_per_instruction
= 1;
20449 complaint (_("invalid maximum_ops_per_instruction "
20450 "in `.debug_line' section"));
20453 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20455 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20457 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20459 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20461 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20463 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20464 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20466 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20470 if (lh
->version
>= 5)
20472 /* Read directory table. */
20473 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20475 [] (struct line_header
*header
, const char *name
,
20476 dir_index d_index
, unsigned int mod_time
,
20477 unsigned int length
)
20479 header
->add_include_dir (name
);
20482 /* Read file name table. */
20483 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20485 [] (struct line_header
*header
, const char *name
,
20486 dir_index d_index
, unsigned int mod_time
,
20487 unsigned int length
)
20489 header
->add_file_name (name
, d_index
, mod_time
, length
);
20494 /* Read directory table. */
20495 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20497 line_ptr
+= bytes_read
;
20498 lh
->add_include_dir (cur_dir
);
20500 line_ptr
+= bytes_read
;
20502 /* Read file name table. */
20503 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20505 unsigned int mod_time
, length
;
20508 line_ptr
+= bytes_read
;
20509 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20510 line_ptr
+= bytes_read
;
20511 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20512 line_ptr
+= bytes_read
;
20513 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20514 line_ptr
+= bytes_read
;
20516 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20518 line_ptr
+= bytes_read
;
20520 lh
->statement_program_start
= line_ptr
;
20522 if (line_ptr
> (section
->buffer
+ section
->size
))
20523 complaint (_("line number info header doesn't "
20524 "fit in `.debug_line' section"));
20529 /* Subroutine of dwarf_decode_lines to simplify it.
20530 Return the file name of the psymtab for included file FILE_INDEX
20531 in line header LH of PST.
20532 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20533 If space for the result is malloc'd, *NAME_HOLDER will be set.
20534 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20536 static const char *
20537 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20538 const struct partial_symtab
*pst
,
20539 const char *comp_dir
,
20540 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20542 const file_entry
&fe
= lh
->file_names
[file_index
];
20543 const char *include_name
= fe
.name
;
20544 const char *include_name_to_compare
= include_name
;
20545 const char *pst_filename
;
20548 const char *dir_name
= fe
.include_dir (lh
);
20550 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20551 if (!IS_ABSOLUTE_PATH (include_name
)
20552 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20554 /* Avoid creating a duplicate psymtab for PST.
20555 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20556 Before we do the comparison, however, we need to account
20557 for DIR_NAME and COMP_DIR.
20558 First prepend dir_name (if non-NULL). If we still don't
20559 have an absolute path prepend comp_dir (if non-NULL).
20560 However, the directory we record in the include-file's
20561 psymtab does not contain COMP_DIR (to match the
20562 corresponding symtab(s)).
20567 bash$ gcc -g ./hello.c
20568 include_name = "hello.c"
20570 DW_AT_comp_dir = comp_dir = "/tmp"
20571 DW_AT_name = "./hello.c"
20575 if (dir_name
!= NULL
)
20577 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20578 include_name
, (char *) NULL
));
20579 include_name
= name_holder
->get ();
20580 include_name_to_compare
= include_name
;
20582 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20584 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20585 include_name
, (char *) NULL
));
20586 include_name_to_compare
= hold_compare
.get ();
20590 pst_filename
= pst
->filename
;
20591 gdb::unique_xmalloc_ptr
<char> copied_name
;
20592 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20594 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20595 pst_filename
, (char *) NULL
));
20596 pst_filename
= copied_name
.get ();
20599 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20603 return include_name
;
20606 /* State machine to track the state of the line number program. */
20608 class lnp_state_machine
20611 /* Initialize a machine state for the start of a line number
20613 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
20614 bool record_lines_p
);
20616 file_entry
*current_file ()
20618 /* lh->file_names is 0-based, but the file name numbers in the
20619 statement program are 1-based. */
20620 return m_line_header
->file_name_at (m_file
);
20623 /* Record the line in the state machine. END_SEQUENCE is true if
20624 we're processing the end of a sequence. */
20625 void record_line (bool end_sequence
);
20627 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
20628 nop-out rest of the lines in this sequence. */
20629 void check_line_address (struct dwarf2_cu
*cu
,
20630 const gdb_byte
*line_ptr
,
20631 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
20633 void handle_set_discriminator (unsigned int discriminator
)
20635 m_discriminator
= discriminator
;
20636 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20639 /* Handle DW_LNE_set_address. */
20640 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20643 address
+= baseaddr
;
20644 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20647 /* Handle DW_LNS_advance_pc. */
20648 void handle_advance_pc (CORE_ADDR adjust
);
20650 /* Handle a special opcode. */
20651 void handle_special_opcode (unsigned char op_code
);
20653 /* Handle DW_LNS_advance_line. */
20654 void handle_advance_line (int line_delta
)
20656 advance_line (line_delta
);
20659 /* Handle DW_LNS_set_file. */
20660 void handle_set_file (file_name_index file
);
20662 /* Handle DW_LNS_negate_stmt. */
20663 void handle_negate_stmt ()
20665 m_is_stmt
= !m_is_stmt
;
20668 /* Handle DW_LNS_const_add_pc. */
20669 void handle_const_add_pc ();
20671 /* Handle DW_LNS_fixed_advance_pc. */
20672 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20674 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20678 /* Handle DW_LNS_copy. */
20679 void handle_copy ()
20681 record_line (false);
20682 m_discriminator
= 0;
20685 /* Handle DW_LNE_end_sequence. */
20686 void handle_end_sequence ()
20688 m_currently_recording_lines
= true;
20692 /* Advance the line by LINE_DELTA. */
20693 void advance_line (int line_delta
)
20695 m_line
+= line_delta
;
20697 if (line_delta
!= 0)
20698 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20701 struct dwarf2_cu
*m_cu
;
20703 gdbarch
*m_gdbarch
;
20705 /* True if we're recording lines.
20706 Otherwise we're building partial symtabs and are just interested in
20707 finding include files mentioned by the line number program. */
20708 bool m_record_lines_p
;
20710 /* The line number header. */
20711 line_header
*m_line_header
;
20713 /* These are part of the standard DWARF line number state machine,
20714 and initialized according to the DWARF spec. */
20716 unsigned char m_op_index
= 0;
20717 /* The line table index (1-based) of the current file. */
20718 file_name_index m_file
= (file_name_index
) 1;
20719 unsigned int m_line
= 1;
20721 /* These are initialized in the constructor. */
20723 CORE_ADDR m_address
;
20725 unsigned int m_discriminator
;
20727 /* Additional bits of state we need to track. */
20729 /* The last file that we called dwarf2_start_subfile for.
20730 This is only used for TLLs. */
20731 unsigned int m_last_file
= 0;
20732 /* The last file a line number was recorded for. */
20733 struct subfile
*m_last_subfile
= NULL
;
20735 /* When true, record the lines we decode. */
20736 bool m_currently_recording_lines
= false;
20738 /* The last line number that was recorded, used to coalesce
20739 consecutive entries for the same line. This can happen, for
20740 example, when discriminators are present. PR 17276. */
20741 unsigned int m_last_line
= 0;
20742 bool m_line_has_non_zero_discriminator
= false;
20746 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20748 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20749 / m_line_header
->maximum_ops_per_instruction
)
20750 * m_line_header
->minimum_instruction_length
);
20751 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20752 m_op_index
= ((m_op_index
+ adjust
)
20753 % m_line_header
->maximum_ops_per_instruction
);
20757 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20759 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20760 CORE_ADDR addr_adj
= (((m_op_index
20761 + (adj_opcode
/ m_line_header
->line_range
))
20762 / m_line_header
->maximum_ops_per_instruction
)
20763 * m_line_header
->minimum_instruction_length
);
20764 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20765 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20766 % m_line_header
->maximum_ops_per_instruction
);
20768 int line_delta
= (m_line_header
->line_base
20769 + (adj_opcode
% m_line_header
->line_range
));
20770 advance_line (line_delta
);
20771 record_line (false);
20772 m_discriminator
= 0;
20776 lnp_state_machine::handle_set_file (file_name_index file
)
20780 const file_entry
*fe
= current_file ();
20782 dwarf2_debug_line_missing_file_complaint ();
20783 else if (m_record_lines_p
)
20785 const char *dir
= fe
->include_dir (m_line_header
);
20787 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20788 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20789 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
20794 lnp_state_machine::handle_const_add_pc ()
20797 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20800 = (((m_op_index
+ adjust
)
20801 / m_line_header
->maximum_ops_per_instruction
)
20802 * m_line_header
->minimum_instruction_length
);
20804 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20805 m_op_index
= ((m_op_index
+ adjust
)
20806 % m_line_header
->maximum_ops_per_instruction
);
20809 /* Return non-zero if we should add LINE to the line number table.
20810 LINE is the line to add, LAST_LINE is the last line that was added,
20811 LAST_SUBFILE is the subfile for LAST_LINE.
20812 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20813 had a non-zero discriminator.
20815 We have to be careful in the presence of discriminators.
20816 E.g., for this line:
20818 for (i = 0; i < 100000; i++);
20820 clang can emit four line number entries for that one line,
20821 each with a different discriminator.
20822 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20824 However, we want gdb to coalesce all four entries into one.
20825 Otherwise the user could stepi into the middle of the line and
20826 gdb would get confused about whether the pc really was in the
20827 middle of the line.
20829 Things are further complicated by the fact that two consecutive
20830 line number entries for the same line is a heuristic used by gcc
20831 to denote the end of the prologue. So we can't just discard duplicate
20832 entries, we have to be selective about it. The heuristic we use is
20833 that we only collapse consecutive entries for the same line if at least
20834 one of those entries has a non-zero discriminator. PR 17276.
20836 Note: Addresses in the line number state machine can never go backwards
20837 within one sequence, thus this coalescing is ok. */
20840 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20841 unsigned int line
, unsigned int last_line
,
20842 int line_has_non_zero_discriminator
,
20843 struct subfile
*last_subfile
)
20845 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20847 if (line
!= last_line
)
20849 /* Same line for the same file that we've seen already.
20850 As a last check, for pr 17276, only record the line if the line
20851 has never had a non-zero discriminator. */
20852 if (!line_has_non_zero_discriminator
)
20857 /* Use the CU's builder to record line number LINE beginning at
20858 address ADDRESS in the line table of subfile SUBFILE. */
20861 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20862 unsigned int line
, CORE_ADDR address
,
20863 struct dwarf2_cu
*cu
)
20865 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20867 if (dwarf_line_debug
)
20869 fprintf_unfiltered (gdb_stdlog
,
20870 "Recording line %u, file %s, address %s\n",
20871 line
, lbasename (subfile
->name
),
20872 paddress (gdbarch
, address
));
20876 cu
->get_builder ()->record_line (subfile
, line
, addr
);
20879 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20880 Mark the end of a set of line number records.
20881 The arguments are the same as for dwarf_record_line_1.
20882 If SUBFILE is NULL the request is ignored. */
20885 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20886 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20888 if (subfile
== NULL
)
20891 if (dwarf_line_debug
)
20893 fprintf_unfiltered (gdb_stdlog
,
20894 "Finishing current line, file %s, address %s\n",
20895 lbasename (subfile
->name
),
20896 paddress (gdbarch
, address
));
20899 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, cu
);
20903 lnp_state_machine::record_line (bool end_sequence
)
20905 if (dwarf_line_debug
)
20907 fprintf_unfiltered (gdb_stdlog
,
20908 "Processing actual line %u: file %u,"
20909 " address %s, is_stmt %u, discrim %u\n",
20910 m_line
, to_underlying (m_file
),
20911 paddress (m_gdbarch
, m_address
),
20912 m_is_stmt
, m_discriminator
);
20915 file_entry
*fe
= current_file ();
20918 dwarf2_debug_line_missing_file_complaint ();
20919 /* For now we ignore lines not starting on an instruction boundary.
20920 But not when processing end_sequence for compatibility with the
20921 previous version of the code. */
20922 else if (m_op_index
== 0 || end_sequence
)
20924 fe
->included_p
= 1;
20925 if (m_record_lines_p
&& (producer_is_codewarrior (m_cu
) || m_is_stmt
))
20927 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20930 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20931 m_currently_recording_lines
? m_cu
: nullptr);
20936 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20937 m_line_has_non_zero_discriminator
,
20940 buildsym_compunit
*builder
= m_cu
->get_builder ();
20941 dwarf_record_line_1 (m_gdbarch
,
20942 builder
->get_current_subfile (),
20944 m_currently_recording_lines
? m_cu
: nullptr);
20946 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20947 m_last_line
= m_line
;
20953 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20954 line_header
*lh
, bool record_lines_p
)
20958 m_record_lines_p
= record_lines_p
;
20959 m_line_header
= lh
;
20961 m_currently_recording_lines
= true;
20963 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20964 was a line entry for it so that the backend has a chance to adjust it
20965 and also record it in case it needs it. This is currently used by MIPS
20966 code, cf. `mips_adjust_dwarf2_line'. */
20967 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20968 m_is_stmt
= lh
->default_is_stmt
;
20969 m_discriminator
= 0;
20973 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20974 const gdb_byte
*line_ptr
,
20975 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20977 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20978 the pc range of the CU. However, we restrict the test to only ADDRESS
20979 values of zero to preserve GDB's previous behaviour which is to handle
20980 the specific case of a function being GC'd by the linker. */
20982 if (address
== 0 && address
< unrelocated_lowpc
)
20984 /* This line table is for a function which has been
20985 GCd by the linker. Ignore it. PR gdb/12528 */
20987 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20988 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20990 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20991 line_offset
, objfile_name (objfile
));
20992 m_currently_recording_lines
= false;
20993 /* Note: m_currently_recording_lines is left as false until we see
20994 DW_LNE_end_sequence. */
20998 /* Subroutine of dwarf_decode_lines to simplify it.
20999 Process the line number information in LH.
21000 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
21001 program in order to set included_p for every referenced header. */
21004 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
21005 const int decode_for_pst_p
, CORE_ADDR lowpc
)
21007 const gdb_byte
*line_ptr
, *extended_end
;
21008 const gdb_byte
*line_end
;
21009 unsigned int bytes_read
, extended_len
;
21010 unsigned char op_code
, extended_op
;
21011 CORE_ADDR baseaddr
;
21012 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21013 bfd
*abfd
= objfile
->obfd
;
21014 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21015 /* True if we're recording line info (as opposed to building partial
21016 symtabs and just interested in finding include files mentioned by
21017 the line number program). */
21018 bool record_lines_p
= !decode_for_pst_p
;
21020 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21022 line_ptr
= lh
->statement_program_start
;
21023 line_end
= lh
->statement_program_end
;
21025 /* Read the statement sequences until there's nothing left. */
21026 while (line_ptr
< line_end
)
21028 /* The DWARF line number program state machine. Reset the state
21029 machine at the start of each sequence. */
21030 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
21031 bool end_sequence
= false;
21033 if (record_lines_p
)
21035 /* Start a subfile for the current file of the state
21037 const file_entry
*fe
= state_machine
.current_file ();
21040 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
21043 /* Decode the table. */
21044 while (line_ptr
< line_end
&& !end_sequence
)
21046 op_code
= read_1_byte (abfd
, line_ptr
);
21049 if (op_code
>= lh
->opcode_base
)
21051 /* Special opcode. */
21052 state_machine
.handle_special_opcode (op_code
);
21054 else switch (op_code
)
21056 case DW_LNS_extended_op
:
21057 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
21059 line_ptr
+= bytes_read
;
21060 extended_end
= line_ptr
+ extended_len
;
21061 extended_op
= read_1_byte (abfd
, line_ptr
);
21063 switch (extended_op
)
21065 case DW_LNE_end_sequence
:
21066 state_machine
.handle_end_sequence ();
21067 end_sequence
= true;
21069 case DW_LNE_set_address
:
21072 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
21073 line_ptr
+= bytes_read
;
21075 state_machine
.check_line_address (cu
, line_ptr
,
21076 lowpc
- baseaddr
, address
);
21077 state_machine
.handle_set_address (baseaddr
, address
);
21080 case DW_LNE_define_file
:
21082 const char *cur_file
;
21083 unsigned int mod_time
, length
;
21086 cur_file
= read_direct_string (abfd
, line_ptr
,
21088 line_ptr
+= bytes_read
;
21089 dindex
= (dir_index
)
21090 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21091 line_ptr
+= bytes_read
;
21093 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21094 line_ptr
+= bytes_read
;
21096 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21097 line_ptr
+= bytes_read
;
21098 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
21101 case DW_LNE_set_discriminator
:
21103 /* The discriminator is not interesting to the
21104 debugger; just ignore it. We still need to
21105 check its value though:
21106 if there are consecutive entries for the same
21107 (non-prologue) line we want to coalesce them.
21110 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21111 line_ptr
+= bytes_read
;
21113 state_machine
.handle_set_discriminator (discr
);
21117 complaint (_("mangled .debug_line section"));
21120 /* Make sure that we parsed the extended op correctly. If e.g.
21121 we expected a different address size than the producer used,
21122 we may have read the wrong number of bytes. */
21123 if (line_ptr
!= extended_end
)
21125 complaint (_("mangled .debug_line section"));
21130 state_machine
.handle_copy ();
21132 case DW_LNS_advance_pc
:
21135 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21136 line_ptr
+= bytes_read
;
21138 state_machine
.handle_advance_pc (adjust
);
21141 case DW_LNS_advance_line
:
21144 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
21145 line_ptr
+= bytes_read
;
21147 state_machine
.handle_advance_line (line_delta
);
21150 case DW_LNS_set_file
:
21152 file_name_index file
21153 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
21155 line_ptr
+= bytes_read
;
21157 state_machine
.handle_set_file (file
);
21160 case DW_LNS_set_column
:
21161 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21162 line_ptr
+= bytes_read
;
21164 case DW_LNS_negate_stmt
:
21165 state_machine
.handle_negate_stmt ();
21167 case DW_LNS_set_basic_block
:
21169 /* Add to the address register of the state machine the
21170 address increment value corresponding to special opcode
21171 255. I.e., this value is scaled by the minimum
21172 instruction length since special opcode 255 would have
21173 scaled the increment. */
21174 case DW_LNS_const_add_pc
:
21175 state_machine
.handle_const_add_pc ();
21177 case DW_LNS_fixed_advance_pc
:
21179 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
21182 state_machine
.handle_fixed_advance_pc (addr_adj
);
21187 /* Unknown standard opcode, ignore it. */
21190 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
21192 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21193 line_ptr
+= bytes_read
;
21200 dwarf2_debug_line_missing_end_sequence_complaint ();
21202 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
21203 in which case we still finish recording the last line). */
21204 state_machine
.record_line (true);
21208 /* Decode the Line Number Program (LNP) for the given line_header
21209 structure and CU. The actual information extracted and the type
21210 of structures created from the LNP depends on the value of PST.
21212 1. If PST is NULL, then this procedure uses the data from the program
21213 to create all necessary symbol tables, and their linetables.
21215 2. If PST is not NULL, this procedure reads the program to determine
21216 the list of files included by the unit represented by PST, and
21217 builds all the associated partial symbol tables.
21219 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21220 It is used for relative paths in the line table.
21221 NOTE: When processing partial symtabs (pst != NULL),
21222 comp_dir == pst->dirname.
21224 NOTE: It is important that psymtabs have the same file name (via strcmp)
21225 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21226 symtab we don't use it in the name of the psymtabs we create.
21227 E.g. expand_line_sal requires this when finding psymtabs to expand.
21228 A good testcase for this is mb-inline.exp.
21230 LOWPC is the lowest address in CU (or 0 if not known).
21232 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21233 for its PC<->lines mapping information. Otherwise only the filename
21234 table is read in. */
21237 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21238 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
21239 CORE_ADDR lowpc
, int decode_mapping
)
21241 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21242 const int decode_for_pst_p
= (pst
!= NULL
);
21244 if (decode_mapping
)
21245 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21247 if (decode_for_pst_p
)
21251 /* Now that we're done scanning the Line Header Program, we can
21252 create the psymtab of each included file. */
21253 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
21254 if (lh
->file_names
[file_index
].included_p
== 1)
21256 gdb::unique_xmalloc_ptr
<char> name_holder
;
21257 const char *include_name
=
21258 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
21260 if (include_name
!= NULL
)
21261 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21266 /* Make sure a symtab is created for every file, even files
21267 which contain only variables (i.e. no code with associated
21269 buildsym_compunit
*builder
= cu
->get_builder ();
21270 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
21273 for (i
= 0; i
< lh
->file_names
.size (); i
++)
21275 file_entry
&fe
= lh
->file_names
[i
];
21277 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
21279 if (builder
->get_current_subfile ()->symtab
== NULL
)
21281 builder
->get_current_subfile ()->symtab
21282 = allocate_symtab (cust
,
21283 builder
->get_current_subfile ()->name
);
21285 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
21290 /* Start a subfile for DWARF. FILENAME is the name of the file and
21291 DIRNAME the name of the source directory which contains FILENAME
21292 or NULL if not known.
21293 This routine tries to keep line numbers from identical absolute and
21294 relative file names in a common subfile.
21296 Using the `list' example from the GDB testsuite, which resides in
21297 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21298 of /srcdir/list0.c yields the following debugging information for list0.c:
21300 DW_AT_name: /srcdir/list0.c
21301 DW_AT_comp_dir: /compdir
21302 files.files[0].name: list0.h
21303 files.files[0].dir: /srcdir
21304 files.files[1].name: list0.c
21305 files.files[1].dir: /srcdir
21307 The line number information for list0.c has to end up in a single
21308 subfile, so that `break /srcdir/list0.c:1' works as expected.
21309 start_subfile will ensure that this happens provided that we pass the
21310 concatenation of files.files[1].dir and files.files[1].name as the
21314 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
21315 const char *dirname
)
21319 /* In order not to lose the line information directory,
21320 we concatenate it to the filename when it makes sense.
21321 Note that the Dwarf3 standard says (speaking of filenames in line
21322 information): ``The directory index is ignored for file names
21323 that represent full path names''. Thus ignoring dirname in the
21324 `else' branch below isn't an issue. */
21326 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21328 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21332 cu
->get_builder ()->start_subfile (filename
);
21338 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
21339 buildsym_compunit constructor. */
21341 struct compunit_symtab
*
21342 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
21345 gdb_assert (m_builder
== nullptr);
21347 m_builder
.reset (new struct buildsym_compunit
21348 (per_cu
->dwarf2_per_objfile
->objfile
,
21349 name
, comp_dir
, language
, low_pc
));
21351 list_in_scope
= get_builder ()->get_file_symbols ();
21353 get_builder ()->record_debugformat ("DWARF 2");
21354 get_builder ()->record_producer (producer
);
21356 processing_has_namespace_info
= false;
21358 return get_builder ()->get_compunit_symtab ();
21362 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21363 struct dwarf2_cu
*cu
)
21365 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21366 struct comp_unit_head
*cu_header
= &cu
->header
;
21368 /* NOTE drow/2003-01-30: There used to be a comment and some special
21369 code here to turn a symbol with DW_AT_external and a
21370 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21371 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21372 with some versions of binutils) where shared libraries could have
21373 relocations against symbols in their debug information - the
21374 minimal symbol would have the right address, but the debug info
21375 would not. It's no longer necessary, because we will explicitly
21376 apply relocations when we read in the debug information now. */
21378 /* A DW_AT_location attribute with no contents indicates that a
21379 variable has been optimized away. */
21380 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21382 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21386 /* Handle one degenerate form of location expression specially, to
21387 preserve GDB's previous behavior when section offsets are
21388 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
21389 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
21391 if (attr_form_is_block (attr
)
21392 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21393 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21394 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21395 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
21396 && (DW_BLOCK (attr
)->size
21397 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21399 unsigned int dummy
;
21401 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21402 SYMBOL_VALUE_ADDRESS (sym
) =
21403 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21405 SYMBOL_VALUE_ADDRESS (sym
) =
21406 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21407 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21408 fixup_symbol_section (sym
, objfile
);
21409 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21410 SYMBOL_SECTION (sym
));
21414 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21415 expression evaluator, and use LOC_COMPUTED only when necessary
21416 (i.e. when the value of a register or memory location is
21417 referenced, or a thread-local block, etc.). Then again, it might
21418 not be worthwhile. I'm assuming that it isn't unless performance
21419 or memory numbers show me otherwise. */
21421 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21423 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21424 cu
->has_loclist
= true;
21427 /* Given a pointer to a DWARF information entry, figure out if we need
21428 to make a symbol table entry for it, and if so, create a new entry
21429 and return a pointer to it.
21430 If TYPE is NULL, determine symbol type from the die, otherwise
21431 used the passed type.
21432 If SPACE is not NULL, use it to hold the new symbol. If it is
21433 NULL, allocate a new symbol on the objfile's obstack. */
21435 static struct symbol
*
21436 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21437 struct symbol
*space
)
21439 struct dwarf2_per_objfile
*dwarf2_per_objfile
21440 = cu
->per_cu
->dwarf2_per_objfile
;
21441 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21442 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21443 struct symbol
*sym
= NULL
;
21445 struct attribute
*attr
= NULL
;
21446 struct attribute
*attr2
= NULL
;
21447 CORE_ADDR baseaddr
;
21448 struct pending
**list_to_add
= NULL
;
21450 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21452 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21454 name
= dwarf2_name (die
, cu
);
21457 const char *linkagename
;
21458 int suppress_add
= 0;
21463 sym
= allocate_symbol (objfile
);
21464 OBJSTAT (objfile
, n_syms
++);
21466 /* Cache this symbol's name and the name's demangled form (if any). */
21467 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21468 linkagename
= dwarf2_physname (name
, die
, cu
);
21469 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21471 /* Fortran does not have mangling standard and the mangling does differ
21472 between gfortran, iFort etc. */
21473 if (cu
->language
== language_fortran
21474 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21475 symbol_set_demangled_name (&(sym
->ginfo
),
21476 dwarf2_full_name (name
, die
, cu
),
21479 /* Default assumptions.
21480 Use the passed type or decode it from the die. */
21481 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21482 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21484 SYMBOL_TYPE (sym
) = type
;
21486 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21487 attr
= dwarf2_attr (die
,
21488 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21492 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21495 attr
= dwarf2_attr (die
,
21496 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21500 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21501 struct file_entry
*fe
;
21503 if (cu
->line_header
!= NULL
)
21504 fe
= cu
->line_header
->file_name_at (file_index
);
21509 complaint (_("file index out of range"));
21511 symbol_set_symtab (sym
, fe
->symtab
);
21517 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21522 addr
= attr_value_as_address (attr
);
21523 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21524 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21526 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21527 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21528 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21529 add_symbol_to_list (sym
, cu
->list_in_scope
);
21531 case DW_TAG_subprogram
:
21532 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21534 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21535 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21536 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21537 || cu
->language
== language_ada
)
21539 /* Subprograms marked external are stored as a global symbol.
21540 Ada subprograms, whether marked external or not, are always
21541 stored as a global symbol, because we want to be able to
21542 access them globally. For instance, we want to be able
21543 to break on a nested subprogram without having to
21544 specify the context. */
21545 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21549 list_to_add
= cu
->list_in_scope
;
21552 case DW_TAG_inlined_subroutine
:
21553 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21555 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21556 SYMBOL_INLINED (sym
) = 1;
21557 list_to_add
= cu
->list_in_scope
;
21559 case DW_TAG_template_value_param
:
21561 /* Fall through. */
21562 case DW_TAG_constant
:
21563 case DW_TAG_variable
:
21564 case DW_TAG_member
:
21565 /* Compilation with minimal debug info may result in
21566 variables with missing type entries. Change the
21567 misleading `void' type to something sensible. */
21568 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21569 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21571 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21572 /* In the case of DW_TAG_member, we should only be called for
21573 static const members. */
21574 if (die
->tag
== DW_TAG_member
)
21576 /* dwarf2_add_field uses die_is_declaration,
21577 so we do the same. */
21578 gdb_assert (die_is_declaration (die
, cu
));
21583 dwarf2_const_value (attr
, sym
, cu
);
21584 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21587 if (attr2
&& (DW_UNSND (attr2
) != 0))
21588 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21590 list_to_add
= cu
->list_in_scope
;
21594 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21597 var_decode_location (attr
, sym
, cu
);
21598 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21600 /* Fortran explicitly imports any global symbols to the local
21601 scope by DW_TAG_common_block. */
21602 if (cu
->language
== language_fortran
&& die
->parent
21603 && die
->parent
->tag
== DW_TAG_common_block
)
21606 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21607 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21608 && !dwarf2_per_objfile
->has_section_at_zero
)
21610 /* When a static variable is eliminated by the linker,
21611 the corresponding debug information is not stripped
21612 out, but the variable address is set to null;
21613 do not add such variables into symbol table. */
21615 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21617 /* Workaround gfortran PR debug/40040 - it uses
21618 DW_AT_location for variables in -fPIC libraries which may
21619 get overriden by other libraries/executable and get
21620 a different address. Resolve it by the minimal symbol
21621 which may come from inferior's executable using copy
21622 relocation. Make this workaround only for gfortran as for
21623 other compilers GDB cannot guess the minimal symbol
21624 Fortran mangling kind. */
21625 if (cu
->language
== language_fortran
&& die
->parent
21626 && die
->parent
->tag
== DW_TAG_module
21628 && startswith (cu
->producer
, "GNU Fortran"))
21629 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21631 /* A variable with DW_AT_external is never static,
21632 but it may be block-scoped. */
21634 = ((cu
->list_in_scope
21635 == cu
->get_builder ()->get_file_symbols ())
21636 ? cu
->get_builder ()->get_global_symbols ()
21637 : cu
->list_in_scope
);
21640 list_to_add
= cu
->list_in_scope
;
21644 /* We do not know the address of this symbol.
21645 If it is an external symbol and we have type information
21646 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21647 The address of the variable will then be determined from
21648 the minimal symbol table whenever the variable is
21650 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21652 /* Fortran explicitly imports any global symbols to the local
21653 scope by DW_TAG_common_block. */
21654 if (cu
->language
== language_fortran
&& die
->parent
21655 && die
->parent
->tag
== DW_TAG_common_block
)
21657 /* SYMBOL_CLASS doesn't matter here because
21658 read_common_block is going to reset it. */
21660 list_to_add
= cu
->list_in_scope
;
21662 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21663 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21665 /* A variable with DW_AT_external is never static, but it
21666 may be block-scoped. */
21668 = ((cu
->list_in_scope
21669 == cu
->get_builder ()->get_file_symbols ())
21670 ? cu
->get_builder ()->get_global_symbols ()
21671 : cu
->list_in_scope
);
21673 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21675 else if (!die_is_declaration (die
, cu
))
21677 /* Use the default LOC_OPTIMIZED_OUT class. */
21678 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21680 list_to_add
= cu
->list_in_scope
;
21684 case DW_TAG_formal_parameter
:
21686 /* If we are inside a function, mark this as an argument. If
21687 not, we might be looking at an argument to an inlined function
21688 when we do not have enough information to show inlined frames;
21689 pretend it's a local variable in that case so that the user can
21691 struct context_stack
*curr
21692 = cu
->get_builder ()->get_current_context_stack ();
21693 if (curr
!= nullptr && curr
->name
!= nullptr)
21694 SYMBOL_IS_ARGUMENT (sym
) = 1;
21695 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21698 var_decode_location (attr
, sym
, cu
);
21700 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21703 dwarf2_const_value (attr
, sym
, cu
);
21706 list_to_add
= cu
->list_in_scope
;
21709 case DW_TAG_unspecified_parameters
:
21710 /* From varargs functions; gdb doesn't seem to have any
21711 interest in this information, so just ignore it for now.
21714 case DW_TAG_template_type_param
:
21716 /* Fall through. */
21717 case DW_TAG_class_type
:
21718 case DW_TAG_interface_type
:
21719 case DW_TAG_structure_type
:
21720 case DW_TAG_union_type
:
21721 case DW_TAG_set_type
:
21722 case DW_TAG_enumeration_type
:
21723 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21724 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21727 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21728 really ever be static objects: otherwise, if you try
21729 to, say, break of a class's method and you're in a file
21730 which doesn't mention that class, it won't work unless
21731 the check for all static symbols in lookup_symbol_aux
21732 saves you. See the OtherFileClass tests in
21733 gdb.c++/namespace.exp. */
21737 buildsym_compunit
*builder
= cu
->get_builder ();
21739 = (cu
->list_in_scope
== builder
->get_file_symbols ()
21740 && cu
->language
== language_cplus
21741 ? builder
->get_global_symbols ()
21742 : cu
->list_in_scope
);
21744 /* The semantics of C++ state that "struct foo {
21745 ... }" also defines a typedef for "foo". */
21746 if (cu
->language
== language_cplus
21747 || cu
->language
== language_ada
21748 || cu
->language
== language_d
21749 || cu
->language
== language_rust
)
21751 /* The symbol's name is already allocated along
21752 with this objfile, so we don't need to
21753 duplicate it for the type. */
21754 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21755 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21760 case DW_TAG_typedef
:
21761 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21762 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21763 list_to_add
= cu
->list_in_scope
;
21765 case DW_TAG_base_type
:
21766 case DW_TAG_subrange_type
:
21767 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21768 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21769 list_to_add
= cu
->list_in_scope
;
21771 case DW_TAG_enumerator
:
21772 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21775 dwarf2_const_value (attr
, sym
, cu
);
21778 /* NOTE: carlton/2003-11-10: See comment above in the
21779 DW_TAG_class_type, etc. block. */
21782 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
21783 && cu
->language
== language_cplus
21784 ? cu
->get_builder ()->get_global_symbols ()
21785 : cu
->list_in_scope
);
21788 case DW_TAG_imported_declaration
:
21789 case DW_TAG_namespace
:
21790 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21791 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21793 case DW_TAG_module
:
21794 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21795 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21796 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21798 case DW_TAG_common_block
:
21799 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21800 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21801 add_symbol_to_list (sym
, cu
->list_in_scope
);
21804 /* Not a tag we recognize. Hopefully we aren't processing
21805 trash data, but since we must specifically ignore things
21806 we don't recognize, there is nothing else we should do at
21808 complaint (_("unsupported tag: '%s'"),
21809 dwarf_tag_name (die
->tag
));
21815 sym
->hash_next
= objfile
->template_symbols
;
21816 objfile
->template_symbols
= sym
;
21817 list_to_add
= NULL
;
21820 if (list_to_add
!= NULL
)
21821 add_symbol_to_list (sym
, list_to_add
);
21823 /* For the benefit of old versions of GCC, check for anonymous
21824 namespaces based on the demangled name. */
21825 if (!cu
->processing_has_namespace_info
21826 && cu
->language
== language_cplus
)
21827 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21832 /* Given an attr with a DW_FORM_dataN value in host byte order,
21833 zero-extend it as appropriate for the symbol's type. The DWARF
21834 standard (v4) is not entirely clear about the meaning of using
21835 DW_FORM_dataN for a constant with a signed type, where the type is
21836 wider than the data. The conclusion of a discussion on the DWARF
21837 list was that this is unspecified. We choose to always zero-extend
21838 because that is the interpretation long in use by GCC. */
21841 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21842 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21844 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21845 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21846 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21847 LONGEST l
= DW_UNSND (attr
);
21849 if (bits
< sizeof (*value
) * 8)
21851 l
&= ((LONGEST
) 1 << bits
) - 1;
21854 else if (bits
== sizeof (*value
) * 8)
21858 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21859 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21866 /* Read a constant value from an attribute. Either set *VALUE, or if
21867 the value does not fit in *VALUE, set *BYTES - either already
21868 allocated on the objfile obstack, or newly allocated on OBSTACK,
21869 or, set *BATON, if we translated the constant to a location
21873 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21874 const char *name
, struct obstack
*obstack
,
21875 struct dwarf2_cu
*cu
,
21876 LONGEST
*value
, const gdb_byte
**bytes
,
21877 struct dwarf2_locexpr_baton
**baton
)
21879 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21880 struct comp_unit_head
*cu_header
= &cu
->header
;
21881 struct dwarf_block
*blk
;
21882 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21883 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21889 switch (attr
->form
)
21892 case DW_FORM_addrx
:
21893 case DW_FORM_GNU_addr_index
:
21897 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21898 dwarf2_const_value_length_mismatch_complaint (name
,
21899 cu_header
->addr_size
,
21900 TYPE_LENGTH (type
));
21901 /* Symbols of this form are reasonably rare, so we just
21902 piggyback on the existing location code rather than writing
21903 a new implementation of symbol_computed_ops. */
21904 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21905 (*baton
)->per_cu
= cu
->per_cu
;
21906 gdb_assert ((*baton
)->per_cu
);
21908 (*baton
)->size
= 2 + cu_header
->addr_size
;
21909 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21910 (*baton
)->data
= data
;
21912 data
[0] = DW_OP_addr
;
21913 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21914 byte_order
, DW_ADDR (attr
));
21915 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21918 case DW_FORM_string
:
21921 case DW_FORM_GNU_str_index
:
21922 case DW_FORM_GNU_strp_alt
:
21923 /* DW_STRING is already allocated on the objfile obstack, point
21925 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21927 case DW_FORM_block1
:
21928 case DW_FORM_block2
:
21929 case DW_FORM_block4
:
21930 case DW_FORM_block
:
21931 case DW_FORM_exprloc
:
21932 case DW_FORM_data16
:
21933 blk
= DW_BLOCK (attr
);
21934 if (TYPE_LENGTH (type
) != blk
->size
)
21935 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21936 TYPE_LENGTH (type
));
21937 *bytes
= blk
->data
;
21940 /* The DW_AT_const_value attributes are supposed to carry the
21941 symbol's value "represented as it would be on the target
21942 architecture." By the time we get here, it's already been
21943 converted to host endianness, so we just need to sign- or
21944 zero-extend it as appropriate. */
21945 case DW_FORM_data1
:
21946 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21948 case DW_FORM_data2
:
21949 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21951 case DW_FORM_data4
:
21952 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21954 case DW_FORM_data8
:
21955 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21958 case DW_FORM_sdata
:
21959 case DW_FORM_implicit_const
:
21960 *value
= DW_SND (attr
);
21963 case DW_FORM_udata
:
21964 *value
= DW_UNSND (attr
);
21968 complaint (_("unsupported const value attribute form: '%s'"),
21969 dwarf_form_name (attr
->form
));
21976 /* Copy constant value from an attribute to a symbol. */
21979 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21980 struct dwarf2_cu
*cu
)
21982 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21984 const gdb_byte
*bytes
;
21985 struct dwarf2_locexpr_baton
*baton
;
21987 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21988 SYMBOL_PRINT_NAME (sym
),
21989 &objfile
->objfile_obstack
, cu
,
21990 &value
, &bytes
, &baton
);
21994 SYMBOL_LOCATION_BATON (sym
) = baton
;
21995 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21997 else if (bytes
!= NULL
)
21999 SYMBOL_VALUE_BYTES (sym
) = bytes
;
22000 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
22004 SYMBOL_VALUE (sym
) = value
;
22005 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
22009 /* Return the type of the die in question using its DW_AT_type attribute. */
22011 static struct type
*
22012 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22014 struct attribute
*type_attr
;
22016 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
22019 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22020 /* A missing DW_AT_type represents a void type. */
22021 return objfile_type (objfile
)->builtin_void
;
22024 return lookup_die_type (die
, type_attr
, cu
);
22027 /* True iff CU's producer generates GNAT Ada auxiliary information
22028 that allows to find parallel types through that information instead
22029 of having to do expensive parallel lookups by type name. */
22032 need_gnat_info (struct dwarf2_cu
*cu
)
22034 /* Assume that the Ada compiler was GNAT, which always produces
22035 the auxiliary information. */
22036 return (cu
->language
== language_ada
);
22039 /* Return the auxiliary type of the die in question using its
22040 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
22041 attribute is not present. */
22043 static struct type
*
22044 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22046 struct attribute
*type_attr
;
22048 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
22052 return lookup_die_type (die
, type_attr
, cu
);
22055 /* If DIE has a descriptive_type attribute, then set the TYPE's
22056 descriptive type accordingly. */
22059 set_descriptive_type (struct type
*type
, struct die_info
*die
,
22060 struct dwarf2_cu
*cu
)
22062 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
22064 if (descriptive_type
)
22066 ALLOCATE_GNAT_AUX_TYPE (type
);
22067 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
22071 /* Return the containing type of the die in question using its
22072 DW_AT_containing_type attribute. */
22074 static struct type
*
22075 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22077 struct attribute
*type_attr
;
22078 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22080 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
22082 error (_("Dwarf Error: Problem turning containing type into gdb type "
22083 "[in module %s]"), objfile_name (objfile
));
22085 return lookup_die_type (die
, type_attr
, cu
);
22088 /* Return an error marker type to use for the ill formed type in DIE/CU. */
22090 static struct type
*
22091 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
22093 struct dwarf2_per_objfile
*dwarf2_per_objfile
22094 = cu
->per_cu
->dwarf2_per_objfile
;
22095 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22098 std::string message
22099 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
22100 objfile_name (objfile
),
22101 sect_offset_str (cu
->header
.sect_off
),
22102 sect_offset_str (die
->sect_off
));
22103 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
22105 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
22108 /* Look up the type of DIE in CU using its type attribute ATTR.
22109 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
22110 DW_AT_containing_type.
22111 If there is no type substitute an error marker. */
22113 static struct type
*
22114 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
22115 struct dwarf2_cu
*cu
)
22117 struct dwarf2_per_objfile
*dwarf2_per_objfile
22118 = cu
->per_cu
->dwarf2_per_objfile
;
22119 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22120 struct type
*this_type
;
22122 gdb_assert (attr
->name
== DW_AT_type
22123 || attr
->name
== DW_AT_GNAT_descriptive_type
22124 || attr
->name
== DW_AT_containing_type
);
22126 /* First see if we have it cached. */
22128 if (attr
->form
== DW_FORM_GNU_ref_alt
)
22130 struct dwarf2_per_cu_data
*per_cu
;
22131 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22133 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
22134 dwarf2_per_objfile
);
22135 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
22137 else if (attr_form_is_ref (attr
))
22139 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22141 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
22143 else if (attr
->form
== DW_FORM_ref_sig8
)
22145 ULONGEST signature
= DW_SIGNATURE (attr
);
22147 return get_signatured_type (die
, signature
, cu
);
22151 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
22152 " at %s [in module %s]"),
22153 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
22154 objfile_name (objfile
));
22155 return build_error_marker_type (cu
, die
);
22158 /* If not cached we need to read it in. */
22160 if (this_type
== NULL
)
22162 struct die_info
*type_die
= NULL
;
22163 struct dwarf2_cu
*type_cu
= cu
;
22165 if (attr_form_is_ref (attr
))
22166 type_die
= follow_die_ref (die
, attr
, &type_cu
);
22167 if (type_die
== NULL
)
22168 return build_error_marker_type (cu
, die
);
22169 /* If we find the type now, it's probably because the type came
22170 from an inter-CU reference and the type's CU got expanded before
22172 this_type
= read_type_die (type_die
, type_cu
);
22175 /* If we still don't have a type use an error marker. */
22177 if (this_type
== NULL
)
22178 return build_error_marker_type (cu
, die
);
22183 /* Return the type in DIE, CU.
22184 Returns NULL for invalid types.
22186 This first does a lookup in die_type_hash,
22187 and only reads the die in if necessary.
22189 NOTE: This can be called when reading in partial or full symbols. */
22191 static struct type
*
22192 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
22194 struct type
*this_type
;
22196 this_type
= get_die_type (die
, cu
);
22200 return read_type_die_1 (die
, cu
);
22203 /* Read the type in DIE, CU.
22204 Returns NULL for invalid types. */
22206 static struct type
*
22207 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
22209 struct type
*this_type
= NULL
;
22213 case DW_TAG_class_type
:
22214 case DW_TAG_interface_type
:
22215 case DW_TAG_structure_type
:
22216 case DW_TAG_union_type
:
22217 this_type
= read_structure_type (die
, cu
);
22219 case DW_TAG_enumeration_type
:
22220 this_type
= read_enumeration_type (die
, cu
);
22222 case DW_TAG_subprogram
:
22223 case DW_TAG_subroutine_type
:
22224 case DW_TAG_inlined_subroutine
:
22225 this_type
= read_subroutine_type (die
, cu
);
22227 case DW_TAG_array_type
:
22228 this_type
= read_array_type (die
, cu
);
22230 case DW_TAG_set_type
:
22231 this_type
= read_set_type (die
, cu
);
22233 case DW_TAG_pointer_type
:
22234 this_type
= read_tag_pointer_type (die
, cu
);
22236 case DW_TAG_ptr_to_member_type
:
22237 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22239 case DW_TAG_reference_type
:
22240 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22242 case DW_TAG_rvalue_reference_type
:
22243 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22245 case DW_TAG_const_type
:
22246 this_type
= read_tag_const_type (die
, cu
);
22248 case DW_TAG_volatile_type
:
22249 this_type
= read_tag_volatile_type (die
, cu
);
22251 case DW_TAG_restrict_type
:
22252 this_type
= read_tag_restrict_type (die
, cu
);
22254 case DW_TAG_string_type
:
22255 this_type
= read_tag_string_type (die
, cu
);
22257 case DW_TAG_typedef
:
22258 this_type
= read_typedef (die
, cu
);
22260 case DW_TAG_subrange_type
:
22261 this_type
= read_subrange_type (die
, cu
);
22263 case DW_TAG_base_type
:
22264 this_type
= read_base_type (die
, cu
);
22266 case DW_TAG_unspecified_type
:
22267 this_type
= read_unspecified_type (die
, cu
);
22269 case DW_TAG_namespace
:
22270 this_type
= read_namespace_type (die
, cu
);
22272 case DW_TAG_module
:
22273 this_type
= read_module_type (die
, cu
);
22275 case DW_TAG_atomic_type
:
22276 this_type
= read_tag_atomic_type (die
, cu
);
22279 complaint (_("unexpected tag in read_type_die: '%s'"),
22280 dwarf_tag_name (die
->tag
));
22287 /* See if we can figure out if the class lives in a namespace. We do
22288 this by looking for a member function; its demangled name will
22289 contain namespace info, if there is any.
22290 Return the computed name or NULL.
22291 Space for the result is allocated on the objfile's obstack.
22292 This is the full-die version of guess_partial_die_structure_name.
22293 In this case we know DIE has no useful parent. */
22296 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22298 struct die_info
*spec_die
;
22299 struct dwarf2_cu
*spec_cu
;
22300 struct die_info
*child
;
22301 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22304 spec_die
= die_specification (die
, &spec_cu
);
22305 if (spec_die
!= NULL
)
22311 for (child
= die
->child
;
22313 child
= child
->sibling
)
22315 if (child
->tag
== DW_TAG_subprogram
)
22317 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22319 if (linkage_name
!= NULL
)
22322 = language_class_name_from_physname (cu
->language_defn
,
22326 if (actual_name
!= NULL
)
22328 const char *die_name
= dwarf2_name (die
, cu
);
22330 if (die_name
!= NULL
22331 && strcmp (die_name
, actual_name
) != 0)
22333 /* Strip off the class name from the full name.
22334 We want the prefix. */
22335 int die_name_len
= strlen (die_name
);
22336 int actual_name_len
= strlen (actual_name
);
22338 /* Test for '::' as a sanity check. */
22339 if (actual_name_len
> die_name_len
+ 2
22340 && actual_name
[actual_name_len
22341 - die_name_len
- 1] == ':')
22342 name
= obstack_strndup (
22343 &objfile
->per_bfd
->storage_obstack
,
22344 actual_name
, actual_name_len
- die_name_len
- 2);
22347 xfree (actual_name
);
22356 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22357 prefix part in such case. See
22358 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22360 static const char *
22361 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22363 struct attribute
*attr
;
22366 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22367 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22370 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22373 attr
= dw2_linkage_name_attr (die
, cu
);
22374 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22377 /* dwarf2_name had to be already called. */
22378 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22380 /* Strip the base name, keep any leading namespaces/classes. */
22381 base
= strrchr (DW_STRING (attr
), ':');
22382 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22385 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22386 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
22388 &base
[-1] - DW_STRING (attr
));
22391 /* Return the name of the namespace/class that DIE is defined within,
22392 or "" if we can't tell. The caller should not xfree the result.
22394 For example, if we're within the method foo() in the following
22404 then determine_prefix on foo's die will return "N::C". */
22406 static const char *
22407 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22409 struct dwarf2_per_objfile
*dwarf2_per_objfile
22410 = cu
->per_cu
->dwarf2_per_objfile
;
22411 struct die_info
*parent
, *spec_die
;
22412 struct dwarf2_cu
*spec_cu
;
22413 struct type
*parent_type
;
22414 const char *retval
;
22416 if (cu
->language
!= language_cplus
22417 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22418 && cu
->language
!= language_rust
)
22421 retval
= anonymous_struct_prefix (die
, cu
);
22425 /* We have to be careful in the presence of DW_AT_specification.
22426 For example, with GCC 3.4, given the code
22430 // Definition of N::foo.
22434 then we'll have a tree of DIEs like this:
22436 1: DW_TAG_compile_unit
22437 2: DW_TAG_namespace // N
22438 3: DW_TAG_subprogram // declaration of N::foo
22439 4: DW_TAG_subprogram // definition of N::foo
22440 DW_AT_specification // refers to die #3
22442 Thus, when processing die #4, we have to pretend that we're in
22443 the context of its DW_AT_specification, namely the contex of die
22446 spec_die
= die_specification (die
, &spec_cu
);
22447 if (spec_die
== NULL
)
22448 parent
= die
->parent
;
22451 parent
= spec_die
->parent
;
22455 if (parent
== NULL
)
22457 else if (parent
->building_fullname
)
22460 const char *parent_name
;
22462 /* It has been seen on RealView 2.2 built binaries,
22463 DW_TAG_template_type_param types actually _defined_ as
22464 children of the parent class:
22467 template class <class Enum> Class{};
22468 Class<enum E> class_e;
22470 1: DW_TAG_class_type (Class)
22471 2: DW_TAG_enumeration_type (E)
22472 3: DW_TAG_enumerator (enum1:0)
22473 3: DW_TAG_enumerator (enum2:1)
22475 2: DW_TAG_template_type_param
22476 DW_AT_type DW_FORM_ref_udata (E)
22478 Besides being broken debug info, it can put GDB into an
22479 infinite loop. Consider:
22481 When we're building the full name for Class<E>, we'll start
22482 at Class, and go look over its template type parameters,
22483 finding E. We'll then try to build the full name of E, and
22484 reach here. We're now trying to build the full name of E,
22485 and look over the parent DIE for containing scope. In the
22486 broken case, if we followed the parent DIE of E, we'd again
22487 find Class, and once again go look at its template type
22488 arguments, etc., etc. Simply don't consider such parent die
22489 as source-level parent of this die (it can't be, the language
22490 doesn't allow it), and break the loop here. */
22491 name
= dwarf2_name (die
, cu
);
22492 parent_name
= dwarf2_name (parent
, cu
);
22493 complaint (_("template param type '%s' defined within parent '%s'"),
22494 name
? name
: "<unknown>",
22495 parent_name
? parent_name
: "<unknown>");
22499 switch (parent
->tag
)
22501 case DW_TAG_namespace
:
22502 parent_type
= read_type_die (parent
, cu
);
22503 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22504 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22505 Work around this problem here. */
22506 if (cu
->language
== language_cplus
22507 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
22509 /* We give a name to even anonymous namespaces. */
22510 return TYPE_NAME (parent_type
);
22511 case DW_TAG_class_type
:
22512 case DW_TAG_interface_type
:
22513 case DW_TAG_structure_type
:
22514 case DW_TAG_union_type
:
22515 case DW_TAG_module
:
22516 parent_type
= read_type_die (parent
, cu
);
22517 if (TYPE_NAME (parent_type
) != NULL
)
22518 return TYPE_NAME (parent_type
);
22520 /* An anonymous structure is only allowed non-static data
22521 members; no typedefs, no member functions, et cetera.
22522 So it does not need a prefix. */
22524 case DW_TAG_compile_unit
:
22525 case DW_TAG_partial_unit
:
22526 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22527 if (cu
->language
== language_cplus
22528 && !dwarf2_per_objfile
->types
.empty ()
22529 && die
->child
!= NULL
22530 && (die
->tag
== DW_TAG_class_type
22531 || die
->tag
== DW_TAG_structure_type
22532 || die
->tag
== DW_TAG_union_type
))
22534 char *name
= guess_full_die_structure_name (die
, cu
);
22539 case DW_TAG_enumeration_type
:
22540 parent_type
= read_type_die (parent
, cu
);
22541 if (TYPE_DECLARED_CLASS (parent_type
))
22543 if (TYPE_NAME (parent_type
) != NULL
)
22544 return TYPE_NAME (parent_type
);
22547 /* Fall through. */
22549 return determine_prefix (parent
, cu
);
22553 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22554 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22555 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22556 an obconcat, otherwise allocate storage for the result. The CU argument is
22557 used to determine the language and hence, the appropriate separator. */
22559 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22562 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22563 int physname
, struct dwarf2_cu
*cu
)
22565 const char *lead
= "";
22568 if (suffix
== NULL
|| suffix
[0] == '\0'
22569 || prefix
== NULL
|| prefix
[0] == '\0')
22571 else if (cu
->language
== language_d
)
22573 /* For D, the 'main' function could be defined in any module, but it
22574 should never be prefixed. */
22575 if (strcmp (suffix
, "D main") == 0)
22583 else if (cu
->language
== language_fortran
&& physname
)
22585 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22586 DW_AT_MIPS_linkage_name is preferred and used instead. */
22594 if (prefix
== NULL
)
22596 if (suffix
== NULL
)
22603 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22605 strcpy (retval
, lead
);
22606 strcat (retval
, prefix
);
22607 strcat (retval
, sep
);
22608 strcat (retval
, suffix
);
22613 /* We have an obstack. */
22614 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22618 /* Return sibling of die, NULL if no sibling. */
22620 static struct die_info
*
22621 sibling_die (struct die_info
*die
)
22623 return die
->sibling
;
22626 /* Get name of a die, return NULL if not found. */
22628 static const char *
22629 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22630 struct obstack
*obstack
)
22632 if (name
&& cu
->language
== language_cplus
)
22634 std::string canon_name
= cp_canonicalize_string (name
);
22636 if (!canon_name
.empty ())
22638 if (canon_name
!= name
)
22639 name
= obstack_strdup (obstack
, canon_name
);
22646 /* Get name of a die, return NULL if not found.
22647 Anonymous namespaces are converted to their magic string. */
22649 static const char *
22650 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22652 struct attribute
*attr
;
22653 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22655 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22656 if ((!attr
|| !DW_STRING (attr
))
22657 && die
->tag
!= DW_TAG_namespace
22658 && die
->tag
!= DW_TAG_class_type
22659 && die
->tag
!= DW_TAG_interface_type
22660 && die
->tag
!= DW_TAG_structure_type
22661 && die
->tag
!= DW_TAG_union_type
)
22666 case DW_TAG_compile_unit
:
22667 case DW_TAG_partial_unit
:
22668 /* Compilation units have a DW_AT_name that is a filename, not
22669 a source language identifier. */
22670 case DW_TAG_enumeration_type
:
22671 case DW_TAG_enumerator
:
22672 /* These tags always have simple identifiers already; no need
22673 to canonicalize them. */
22674 return DW_STRING (attr
);
22676 case DW_TAG_namespace
:
22677 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22678 return DW_STRING (attr
);
22679 return CP_ANONYMOUS_NAMESPACE_STR
;
22681 case DW_TAG_class_type
:
22682 case DW_TAG_interface_type
:
22683 case DW_TAG_structure_type
:
22684 case DW_TAG_union_type
:
22685 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22686 structures or unions. These were of the form "._%d" in GCC 4.1,
22687 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22688 and GCC 4.4. We work around this problem by ignoring these. */
22689 if (attr
&& DW_STRING (attr
)
22690 && (startswith (DW_STRING (attr
), "._")
22691 || startswith (DW_STRING (attr
), "<anonymous")))
22694 /* GCC might emit a nameless typedef that has a linkage name. See
22695 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22696 if (!attr
|| DW_STRING (attr
) == NULL
)
22698 char *demangled
= NULL
;
22700 attr
= dw2_linkage_name_attr (die
, cu
);
22701 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22704 /* Avoid demangling DW_STRING (attr) the second time on a second
22705 call for the same DIE. */
22706 if (!DW_STRING_IS_CANONICAL (attr
))
22707 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22713 /* FIXME: we already did this for the partial symbol... */
22715 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
22717 DW_STRING_IS_CANONICAL (attr
) = 1;
22720 /* Strip any leading namespaces/classes, keep only the base name.
22721 DW_AT_name for named DIEs does not contain the prefixes. */
22722 base
= strrchr (DW_STRING (attr
), ':');
22723 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22726 return DW_STRING (attr
);
22735 if (!DW_STRING_IS_CANONICAL (attr
))
22738 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22739 &objfile
->per_bfd
->storage_obstack
);
22740 DW_STRING_IS_CANONICAL (attr
) = 1;
22742 return DW_STRING (attr
);
22745 /* Return the die that this die in an extension of, or NULL if there
22746 is none. *EXT_CU is the CU containing DIE on input, and the CU
22747 containing the return value on output. */
22749 static struct die_info
*
22750 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22752 struct attribute
*attr
;
22754 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22758 return follow_die_ref (die
, attr
, ext_cu
);
22761 /* A convenience function that returns an "unknown" DWARF name,
22762 including the value of V. STR is the name of the entity being
22763 printed, e.g., "TAG". */
22765 static const char *
22766 dwarf_unknown (const char *str
, unsigned v
)
22768 char *cell
= get_print_cell ();
22769 xsnprintf (cell
, PRINT_CELL_SIZE
, "DW_%s_<unknown: %u>", str
, v
);
22773 /* Convert a DIE tag into its string name. */
22775 static const char *
22776 dwarf_tag_name (unsigned tag
)
22778 const char *name
= get_DW_TAG_name (tag
);
22781 return dwarf_unknown ("TAG", tag
);
22786 /* Convert a DWARF attribute code into its string name. */
22788 static const char *
22789 dwarf_attr_name (unsigned attr
)
22793 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22794 if (attr
== DW_AT_MIPS_fde
)
22795 return "DW_AT_MIPS_fde";
22797 if (attr
== DW_AT_HP_block_index
)
22798 return "DW_AT_HP_block_index";
22801 name
= get_DW_AT_name (attr
);
22804 return dwarf_unknown ("AT", attr
);
22809 /* Convert a DWARF value form code into its string name. */
22811 static const char *
22812 dwarf_form_name (unsigned form
)
22814 const char *name
= get_DW_FORM_name (form
);
22817 return dwarf_unknown ("FORM", form
);
22822 static const char *
22823 dwarf_bool_name (unsigned mybool
)
22831 /* Convert a DWARF type code into its string name. */
22833 static const char *
22834 dwarf_type_encoding_name (unsigned enc
)
22836 const char *name
= get_DW_ATE_name (enc
);
22839 return dwarf_unknown ("ATE", enc
);
22845 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22849 print_spaces (indent
, f
);
22850 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22851 dwarf_tag_name (die
->tag
), die
->abbrev
,
22852 sect_offset_str (die
->sect_off
));
22854 if (die
->parent
!= NULL
)
22856 print_spaces (indent
, f
);
22857 fprintf_unfiltered (f
, " parent at offset: %s\n",
22858 sect_offset_str (die
->parent
->sect_off
));
22861 print_spaces (indent
, f
);
22862 fprintf_unfiltered (f
, " has children: %s\n",
22863 dwarf_bool_name (die
->child
!= NULL
));
22865 print_spaces (indent
, f
);
22866 fprintf_unfiltered (f
, " attributes:\n");
22868 for (i
= 0; i
< die
->num_attrs
; ++i
)
22870 print_spaces (indent
, f
);
22871 fprintf_unfiltered (f
, " %s (%s) ",
22872 dwarf_attr_name (die
->attrs
[i
].name
),
22873 dwarf_form_name (die
->attrs
[i
].form
));
22875 switch (die
->attrs
[i
].form
)
22878 case DW_FORM_addrx
:
22879 case DW_FORM_GNU_addr_index
:
22880 fprintf_unfiltered (f
, "address: ");
22881 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22883 case DW_FORM_block2
:
22884 case DW_FORM_block4
:
22885 case DW_FORM_block
:
22886 case DW_FORM_block1
:
22887 fprintf_unfiltered (f
, "block: size %s",
22888 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22890 case DW_FORM_exprloc
:
22891 fprintf_unfiltered (f
, "expression: size %s",
22892 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22894 case DW_FORM_data16
:
22895 fprintf_unfiltered (f
, "constant of 16 bytes");
22897 case DW_FORM_ref_addr
:
22898 fprintf_unfiltered (f
, "ref address: ");
22899 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22901 case DW_FORM_GNU_ref_alt
:
22902 fprintf_unfiltered (f
, "alt ref address: ");
22903 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22909 case DW_FORM_ref_udata
:
22910 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22911 (long) (DW_UNSND (&die
->attrs
[i
])));
22913 case DW_FORM_data1
:
22914 case DW_FORM_data2
:
22915 case DW_FORM_data4
:
22916 case DW_FORM_data8
:
22917 case DW_FORM_udata
:
22918 case DW_FORM_sdata
:
22919 fprintf_unfiltered (f
, "constant: %s",
22920 pulongest (DW_UNSND (&die
->attrs
[i
])));
22922 case DW_FORM_sec_offset
:
22923 fprintf_unfiltered (f
, "section offset: %s",
22924 pulongest (DW_UNSND (&die
->attrs
[i
])));
22926 case DW_FORM_ref_sig8
:
22927 fprintf_unfiltered (f
, "signature: %s",
22928 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22930 case DW_FORM_string
:
22932 case DW_FORM_line_strp
:
22934 case DW_FORM_GNU_str_index
:
22935 case DW_FORM_GNU_strp_alt
:
22936 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22937 DW_STRING (&die
->attrs
[i
])
22938 ? DW_STRING (&die
->attrs
[i
]) : "",
22939 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22942 if (DW_UNSND (&die
->attrs
[i
]))
22943 fprintf_unfiltered (f
, "flag: TRUE");
22945 fprintf_unfiltered (f
, "flag: FALSE");
22947 case DW_FORM_flag_present
:
22948 fprintf_unfiltered (f
, "flag: TRUE");
22950 case DW_FORM_indirect
:
22951 /* The reader will have reduced the indirect form to
22952 the "base form" so this form should not occur. */
22953 fprintf_unfiltered (f
,
22954 "unexpected attribute form: DW_FORM_indirect");
22956 case DW_FORM_implicit_const
:
22957 fprintf_unfiltered (f
, "constant: %s",
22958 plongest (DW_SND (&die
->attrs
[i
])));
22961 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22962 die
->attrs
[i
].form
);
22965 fprintf_unfiltered (f
, "\n");
22970 dump_die_for_error (struct die_info
*die
)
22972 dump_die_shallow (gdb_stderr
, 0, die
);
22976 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22978 int indent
= level
* 4;
22980 gdb_assert (die
!= NULL
);
22982 if (level
>= max_level
)
22985 dump_die_shallow (f
, indent
, die
);
22987 if (die
->child
!= NULL
)
22989 print_spaces (indent
, f
);
22990 fprintf_unfiltered (f
, " Children:");
22991 if (level
+ 1 < max_level
)
22993 fprintf_unfiltered (f
, "\n");
22994 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22998 fprintf_unfiltered (f
,
22999 " [not printed, max nesting level reached]\n");
23003 if (die
->sibling
!= NULL
&& level
> 0)
23005 dump_die_1 (f
, level
, max_level
, die
->sibling
);
23009 /* This is called from the pdie macro in gdbinit.in.
23010 It's not static so gcc will keep a copy callable from gdb. */
23013 dump_die (struct die_info
*die
, int max_level
)
23015 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
23019 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
23023 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
23024 to_underlying (die
->sect_off
),
23030 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
23034 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
23036 if (attr_form_is_ref (attr
))
23037 return (sect_offset
) DW_UNSND (attr
);
23039 complaint (_("unsupported die ref attribute form: '%s'"),
23040 dwarf_form_name (attr
->form
));
23044 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
23045 * the value held by the attribute is not constant. */
23048 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
23050 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
23051 return DW_SND (attr
);
23052 else if (attr
->form
== DW_FORM_udata
23053 || attr
->form
== DW_FORM_data1
23054 || attr
->form
== DW_FORM_data2
23055 || attr
->form
== DW_FORM_data4
23056 || attr
->form
== DW_FORM_data8
)
23057 return DW_UNSND (attr
);
23060 /* For DW_FORM_data16 see attr_form_is_constant. */
23061 complaint (_("Attribute value is not a constant (%s)"),
23062 dwarf_form_name (attr
->form
));
23063 return default_value
;
23067 /* Follow reference or signature attribute ATTR of SRC_DIE.
23068 On entry *REF_CU is the CU of SRC_DIE.
23069 On exit *REF_CU is the CU of the result. */
23071 static struct die_info
*
23072 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23073 struct dwarf2_cu
**ref_cu
)
23075 struct die_info
*die
;
23077 if (attr_form_is_ref (attr
))
23078 die
= follow_die_ref (src_die
, attr
, ref_cu
);
23079 else if (attr
->form
== DW_FORM_ref_sig8
)
23080 die
= follow_die_sig (src_die
, attr
, ref_cu
);
23083 dump_die_for_error (src_die
);
23084 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
23085 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23091 /* Follow reference OFFSET.
23092 On entry *REF_CU is the CU of the source die referencing OFFSET.
23093 On exit *REF_CU is the CU of the result.
23094 Returns NULL if OFFSET is invalid. */
23096 static struct die_info
*
23097 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
23098 struct dwarf2_cu
**ref_cu
)
23100 struct die_info temp_die
;
23101 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
23102 struct dwarf2_per_objfile
*dwarf2_per_objfile
23103 = cu
->per_cu
->dwarf2_per_objfile
;
23105 gdb_assert (cu
->per_cu
!= NULL
);
23109 if (cu
->per_cu
->is_debug_types
)
23111 /* .debug_types CUs cannot reference anything outside their CU.
23112 If they need to, they have to reference a signatured type via
23113 DW_FORM_ref_sig8. */
23114 if (!offset_in_cu_p (&cu
->header
, sect_off
))
23117 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
23118 || !offset_in_cu_p (&cu
->header
, sect_off
))
23120 struct dwarf2_per_cu_data
*per_cu
;
23122 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23123 dwarf2_per_objfile
);
23125 /* If necessary, add it to the queue and load its DIEs. */
23126 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
23127 load_full_comp_unit (per_cu
, false, cu
->language
);
23129 target_cu
= per_cu
->cu
;
23131 else if (cu
->dies
== NULL
)
23133 /* We're loading full DIEs during partial symbol reading. */
23134 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
23135 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
23138 *ref_cu
= target_cu
;
23139 temp_die
.sect_off
= sect_off
;
23141 if (target_cu
!= cu
)
23142 target_cu
->ancestor
= cu
;
23144 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
23146 to_underlying (sect_off
));
23149 /* Follow reference attribute ATTR of SRC_DIE.
23150 On entry *REF_CU is the CU of SRC_DIE.
23151 On exit *REF_CU is the CU of the result. */
23153 static struct die_info
*
23154 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
23155 struct dwarf2_cu
**ref_cu
)
23157 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
23158 struct dwarf2_cu
*cu
= *ref_cu
;
23159 struct die_info
*die
;
23161 die
= follow_die_offset (sect_off
,
23162 (attr
->form
== DW_FORM_GNU_ref_alt
23163 || cu
->per_cu
->is_dwz
),
23166 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
23167 "at %s [in module %s]"),
23168 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
23169 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
23174 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
23175 Returned value is intended for DW_OP_call*. Returned
23176 dwarf2_locexpr_baton->data has lifetime of
23177 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
23179 struct dwarf2_locexpr_baton
23180 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
23181 struct dwarf2_per_cu_data
*per_cu
,
23182 CORE_ADDR (*get_frame_pc
) (void *baton
),
23183 void *baton
, bool resolve_abstract_p
)
23185 struct dwarf2_cu
*cu
;
23186 struct die_info
*die
;
23187 struct attribute
*attr
;
23188 struct dwarf2_locexpr_baton retval
;
23189 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23190 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23192 if (per_cu
->cu
== NULL
)
23193 load_cu (per_cu
, false);
23197 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23198 Instead just throw an error, not much else we can do. */
23199 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23200 sect_offset_str (sect_off
), objfile_name (objfile
));
23203 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23205 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23206 sect_offset_str (sect_off
), objfile_name (objfile
));
23208 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23209 if (!attr
&& resolve_abstract_p
23210 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
23211 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
23213 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23215 = ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23216 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
23218 for (const auto &cand_off
23219 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
23221 struct dwarf2_cu
*cand_cu
= cu
;
23222 struct die_info
*cand
23223 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
23226 || cand
->parent
->tag
!= DW_TAG_subprogram
)
23229 CORE_ADDR pc_low
, pc_high
;
23230 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
23231 if (pc_low
== ((CORE_ADDR
) -1))
23233 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
23234 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
23235 if (!(pc_low
<= pc
&& pc
< pc_high
))
23239 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23246 /* DWARF: "If there is no such attribute, then there is no effect.".
23247 DATA is ignored if SIZE is 0. */
23249 retval
.data
= NULL
;
23252 else if (attr_form_is_section_offset (attr
))
23254 struct dwarf2_loclist_baton loclist_baton
;
23255 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23258 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
23260 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
23262 retval
.size
= size
;
23266 if (!attr_form_is_block (attr
))
23267 error (_("Dwarf Error: DIE at %s referenced in module %s "
23268 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23269 sect_offset_str (sect_off
), objfile_name (objfile
));
23271 retval
.data
= DW_BLOCK (attr
)->data
;
23272 retval
.size
= DW_BLOCK (attr
)->size
;
23274 retval
.per_cu
= cu
->per_cu
;
23276 age_cached_comp_units (dwarf2_per_objfile
);
23281 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
23284 struct dwarf2_locexpr_baton
23285 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23286 struct dwarf2_per_cu_data
*per_cu
,
23287 CORE_ADDR (*get_frame_pc
) (void *baton
),
23290 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23292 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
23295 /* Write a constant of a given type as target-ordered bytes into
23298 static const gdb_byte
*
23299 write_constant_as_bytes (struct obstack
*obstack
,
23300 enum bfd_endian byte_order
,
23307 *len
= TYPE_LENGTH (type
);
23308 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23309 store_unsigned_integer (result
, *len
, byte_order
, value
);
23314 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23315 pointer to the constant bytes and set LEN to the length of the
23316 data. If memory is needed, allocate it on OBSTACK. If the DIE
23317 does not have a DW_AT_const_value, return NULL. */
23320 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23321 struct dwarf2_per_cu_data
*per_cu
,
23322 struct obstack
*obstack
,
23325 struct dwarf2_cu
*cu
;
23326 struct die_info
*die
;
23327 struct attribute
*attr
;
23328 const gdb_byte
*result
= NULL
;
23331 enum bfd_endian byte_order
;
23332 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23334 if (per_cu
->cu
== NULL
)
23335 load_cu (per_cu
, false);
23339 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23340 Instead just throw an error, not much else we can do. */
23341 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23342 sect_offset_str (sect_off
), objfile_name (objfile
));
23345 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23347 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23348 sect_offset_str (sect_off
), objfile_name (objfile
));
23350 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23354 byte_order
= (bfd_big_endian (objfile
->obfd
)
23355 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23357 switch (attr
->form
)
23360 case DW_FORM_addrx
:
23361 case DW_FORM_GNU_addr_index
:
23365 *len
= cu
->header
.addr_size
;
23366 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23367 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23371 case DW_FORM_string
:
23374 case DW_FORM_GNU_str_index
:
23375 case DW_FORM_GNU_strp_alt
:
23376 /* DW_STRING is already allocated on the objfile obstack, point
23378 result
= (const gdb_byte
*) DW_STRING (attr
);
23379 *len
= strlen (DW_STRING (attr
));
23381 case DW_FORM_block1
:
23382 case DW_FORM_block2
:
23383 case DW_FORM_block4
:
23384 case DW_FORM_block
:
23385 case DW_FORM_exprloc
:
23386 case DW_FORM_data16
:
23387 result
= DW_BLOCK (attr
)->data
;
23388 *len
= DW_BLOCK (attr
)->size
;
23391 /* The DW_AT_const_value attributes are supposed to carry the
23392 symbol's value "represented as it would be on the target
23393 architecture." By the time we get here, it's already been
23394 converted to host endianness, so we just need to sign- or
23395 zero-extend it as appropriate. */
23396 case DW_FORM_data1
:
23397 type
= die_type (die
, cu
);
23398 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23399 if (result
== NULL
)
23400 result
= write_constant_as_bytes (obstack
, byte_order
,
23403 case DW_FORM_data2
:
23404 type
= die_type (die
, cu
);
23405 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23406 if (result
== NULL
)
23407 result
= write_constant_as_bytes (obstack
, byte_order
,
23410 case DW_FORM_data4
:
23411 type
= die_type (die
, cu
);
23412 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23413 if (result
== NULL
)
23414 result
= write_constant_as_bytes (obstack
, byte_order
,
23417 case DW_FORM_data8
:
23418 type
= die_type (die
, cu
);
23419 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23420 if (result
== NULL
)
23421 result
= write_constant_as_bytes (obstack
, byte_order
,
23425 case DW_FORM_sdata
:
23426 case DW_FORM_implicit_const
:
23427 type
= die_type (die
, cu
);
23428 result
= write_constant_as_bytes (obstack
, byte_order
,
23429 type
, DW_SND (attr
), len
);
23432 case DW_FORM_udata
:
23433 type
= die_type (die
, cu
);
23434 result
= write_constant_as_bytes (obstack
, byte_order
,
23435 type
, DW_UNSND (attr
), len
);
23439 complaint (_("unsupported const value attribute form: '%s'"),
23440 dwarf_form_name (attr
->form
));
23447 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23448 valid type for this die is found. */
23451 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23452 struct dwarf2_per_cu_data
*per_cu
)
23454 struct dwarf2_cu
*cu
;
23455 struct die_info
*die
;
23457 if (per_cu
->cu
== NULL
)
23458 load_cu (per_cu
, false);
23463 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23467 return die_type (die
, cu
);
23470 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23474 dwarf2_get_die_type (cu_offset die_offset
,
23475 struct dwarf2_per_cu_data
*per_cu
)
23477 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23478 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23481 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23482 On entry *REF_CU is the CU of SRC_DIE.
23483 On exit *REF_CU is the CU of the result.
23484 Returns NULL if the referenced DIE isn't found. */
23486 static struct die_info
*
23487 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23488 struct dwarf2_cu
**ref_cu
)
23490 struct die_info temp_die
;
23491 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
23492 struct die_info
*die
;
23494 /* While it might be nice to assert sig_type->type == NULL here,
23495 we can get here for DW_AT_imported_declaration where we need
23496 the DIE not the type. */
23498 /* If necessary, add it to the queue and load its DIEs. */
23500 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23501 read_signatured_type (sig_type
);
23503 sig_cu
= sig_type
->per_cu
.cu
;
23504 gdb_assert (sig_cu
!= NULL
);
23505 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23506 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23507 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23508 to_underlying (temp_die
.sect_off
));
23511 struct dwarf2_per_objfile
*dwarf2_per_objfile
23512 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23514 /* For .gdb_index version 7 keep track of included TUs.
23515 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23516 if (dwarf2_per_objfile
->index_table
!= NULL
23517 && dwarf2_per_objfile
->index_table
->version
<= 7)
23519 VEC_safe_push (dwarf2_per_cu_ptr
,
23520 (*ref_cu
)->per_cu
->imported_symtabs
,
23526 sig_cu
->ancestor
= cu
;
23534 /* Follow signatured type referenced by ATTR in SRC_DIE.
23535 On entry *REF_CU is the CU of SRC_DIE.
23536 On exit *REF_CU is the CU of the result.
23537 The result is the DIE of the type.
23538 If the referenced type cannot be found an error is thrown. */
23540 static struct die_info
*
23541 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23542 struct dwarf2_cu
**ref_cu
)
23544 ULONGEST signature
= DW_SIGNATURE (attr
);
23545 struct signatured_type
*sig_type
;
23546 struct die_info
*die
;
23548 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23550 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23551 /* sig_type will be NULL if the signatured type is missing from
23553 if (sig_type
== NULL
)
23555 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23556 " from DIE at %s [in module %s]"),
23557 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23558 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23561 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23564 dump_die_for_error (src_die
);
23565 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23566 " from DIE at %s [in module %s]"),
23567 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23568 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23574 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23575 reading in and processing the type unit if necessary. */
23577 static struct type
*
23578 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23579 struct dwarf2_cu
*cu
)
23581 struct dwarf2_per_objfile
*dwarf2_per_objfile
23582 = cu
->per_cu
->dwarf2_per_objfile
;
23583 struct signatured_type
*sig_type
;
23584 struct dwarf2_cu
*type_cu
;
23585 struct die_info
*type_die
;
23588 sig_type
= lookup_signatured_type (cu
, signature
);
23589 /* sig_type will be NULL if the signatured type is missing from
23591 if (sig_type
== NULL
)
23593 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23594 " from DIE at %s [in module %s]"),
23595 hex_string (signature
), sect_offset_str (die
->sect_off
),
23596 objfile_name (dwarf2_per_objfile
->objfile
));
23597 return build_error_marker_type (cu
, die
);
23600 /* If we already know the type we're done. */
23601 if (sig_type
->type
!= NULL
)
23602 return sig_type
->type
;
23605 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23606 if (type_die
!= NULL
)
23608 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23609 is created. This is important, for example, because for c++ classes
23610 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23611 type
= read_type_die (type_die
, type_cu
);
23614 complaint (_("Dwarf Error: Cannot build signatured type %s"
23615 " referenced from DIE at %s [in module %s]"),
23616 hex_string (signature
), sect_offset_str (die
->sect_off
),
23617 objfile_name (dwarf2_per_objfile
->objfile
));
23618 type
= build_error_marker_type (cu
, die
);
23623 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23624 " from DIE at %s [in module %s]"),
23625 hex_string (signature
), sect_offset_str (die
->sect_off
),
23626 objfile_name (dwarf2_per_objfile
->objfile
));
23627 type
= build_error_marker_type (cu
, die
);
23629 sig_type
->type
= type
;
23634 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23635 reading in and processing the type unit if necessary. */
23637 static struct type
*
23638 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23639 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23641 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23642 if (attr_form_is_ref (attr
))
23644 struct dwarf2_cu
*type_cu
= cu
;
23645 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23647 return read_type_die (type_die
, type_cu
);
23649 else if (attr
->form
== DW_FORM_ref_sig8
)
23651 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23655 struct dwarf2_per_objfile
*dwarf2_per_objfile
23656 = cu
->per_cu
->dwarf2_per_objfile
;
23658 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23659 " at %s [in module %s]"),
23660 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23661 objfile_name (dwarf2_per_objfile
->objfile
));
23662 return build_error_marker_type (cu
, die
);
23666 /* Load the DIEs associated with type unit PER_CU into memory. */
23669 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23671 struct signatured_type
*sig_type
;
23673 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23674 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23676 /* We have the per_cu, but we need the signatured_type.
23677 Fortunately this is an easy translation. */
23678 gdb_assert (per_cu
->is_debug_types
);
23679 sig_type
= (struct signatured_type
*) per_cu
;
23681 gdb_assert (per_cu
->cu
== NULL
);
23683 read_signatured_type (sig_type
);
23685 gdb_assert (per_cu
->cu
!= NULL
);
23688 /* die_reader_func for read_signatured_type.
23689 This is identical to load_full_comp_unit_reader,
23690 but is kept separate for now. */
23693 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23694 const gdb_byte
*info_ptr
,
23695 struct die_info
*comp_unit_die
,
23699 struct dwarf2_cu
*cu
= reader
->cu
;
23701 gdb_assert (cu
->die_hash
== NULL
);
23703 htab_create_alloc_ex (cu
->header
.length
/ 12,
23707 &cu
->comp_unit_obstack
,
23708 hashtab_obstack_allocate
,
23709 dummy_obstack_deallocate
);
23712 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23713 &info_ptr
, comp_unit_die
);
23714 cu
->dies
= comp_unit_die
;
23715 /* comp_unit_die is not stored in die_hash, no need. */
23717 /* We try not to read any attributes in this function, because not
23718 all CUs needed for references have been loaded yet, and symbol
23719 table processing isn't initialized. But we have to set the CU language,
23720 or we won't be able to build types correctly.
23721 Similarly, if we do not read the producer, we can not apply
23722 producer-specific interpretation. */
23723 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23726 /* Read in a signatured type and build its CU and DIEs.
23727 If the type is a stub for the real type in a DWO file,
23728 read in the real type from the DWO file as well. */
23731 read_signatured_type (struct signatured_type
*sig_type
)
23733 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23735 gdb_assert (per_cu
->is_debug_types
);
23736 gdb_assert (per_cu
->cu
== NULL
);
23738 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1, false,
23739 read_signatured_type_reader
, NULL
);
23740 sig_type
->per_cu
.tu_read
= 1;
23743 /* Decode simple location descriptions.
23744 Given a pointer to a dwarf block that defines a location, compute
23745 the location and return the value.
23747 NOTE drow/2003-11-18: This function is called in two situations
23748 now: for the address of static or global variables (partial symbols
23749 only) and for offsets into structures which are expected to be
23750 (more or less) constant. The partial symbol case should go away,
23751 and only the constant case should remain. That will let this
23752 function complain more accurately. A few special modes are allowed
23753 without complaint for global variables (for instance, global
23754 register values and thread-local values).
23756 A location description containing no operations indicates that the
23757 object is optimized out. The return value is 0 for that case.
23758 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23759 callers will only want a very basic result and this can become a
23762 Note that stack[0] is unused except as a default error return. */
23765 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23767 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23769 size_t size
= blk
->size
;
23770 const gdb_byte
*data
= blk
->data
;
23771 CORE_ADDR stack
[64];
23773 unsigned int bytes_read
, unsnd
;
23779 stack
[++stacki
] = 0;
23818 stack
[++stacki
] = op
- DW_OP_lit0
;
23853 stack
[++stacki
] = op
- DW_OP_reg0
;
23855 dwarf2_complex_location_expr_complaint ();
23859 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23861 stack
[++stacki
] = unsnd
;
23863 dwarf2_complex_location_expr_complaint ();
23867 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23872 case DW_OP_const1u
:
23873 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23877 case DW_OP_const1s
:
23878 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23882 case DW_OP_const2u
:
23883 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23887 case DW_OP_const2s
:
23888 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23892 case DW_OP_const4u
:
23893 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23897 case DW_OP_const4s
:
23898 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23902 case DW_OP_const8u
:
23903 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23908 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23914 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23919 stack
[stacki
+ 1] = stack
[stacki
];
23924 stack
[stacki
- 1] += stack
[stacki
];
23928 case DW_OP_plus_uconst
:
23929 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23935 stack
[stacki
- 1] -= stack
[stacki
];
23940 /* If we're not the last op, then we definitely can't encode
23941 this using GDB's address_class enum. This is valid for partial
23942 global symbols, although the variable's address will be bogus
23945 dwarf2_complex_location_expr_complaint ();
23948 case DW_OP_GNU_push_tls_address
:
23949 case DW_OP_form_tls_address
:
23950 /* The top of the stack has the offset from the beginning
23951 of the thread control block at which the variable is located. */
23952 /* Nothing should follow this operator, so the top of stack would
23954 /* This is valid for partial global symbols, but the variable's
23955 address will be bogus in the psymtab. Make it always at least
23956 non-zero to not look as a variable garbage collected by linker
23957 which have DW_OP_addr 0. */
23959 dwarf2_complex_location_expr_complaint ();
23963 case DW_OP_GNU_uninit
:
23967 case DW_OP_GNU_addr_index
:
23968 case DW_OP_GNU_const_index
:
23969 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23976 const char *name
= get_DW_OP_name (op
);
23979 complaint (_("unsupported stack op: '%s'"),
23982 complaint (_("unsupported stack op: '%02x'"),
23986 return (stack
[stacki
]);
23989 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23990 outside of the allocated space. Also enforce minimum>0. */
23991 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23993 complaint (_("location description stack overflow"));
23999 complaint (_("location description stack underflow"));
24003 return (stack
[stacki
]);
24006 /* memory allocation interface */
24008 static struct dwarf_block
*
24009 dwarf_alloc_block (struct dwarf2_cu
*cu
)
24011 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
24014 static struct die_info
*
24015 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
24017 struct die_info
*die
;
24018 size_t size
= sizeof (struct die_info
);
24021 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
24023 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
24024 memset (die
, 0, sizeof (struct die_info
));
24029 /* Macro support. */
24031 /* Return file name relative to the compilation directory of file number I in
24032 *LH's file name table. The result is allocated using xmalloc; the caller is
24033 responsible for freeing it. */
24036 file_file_name (int file
, struct line_header
*lh
)
24038 /* Is the file number a valid index into the line header's file name
24039 table? Remember that file numbers start with one, not zero. */
24040 if (1 <= file
&& file
<= lh
->file_names
.size ())
24042 const file_entry
&fe
= lh
->file_names
[file
- 1];
24044 if (!IS_ABSOLUTE_PATH (fe
.name
))
24046 const char *dir
= fe
.include_dir (lh
);
24048 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
24050 return xstrdup (fe
.name
);
24054 /* The compiler produced a bogus file number. We can at least
24055 record the macro definitions made in the file, even if we
24056 won't be able to find the file by name. */
24057 char fake_name
[80];
24059 xsnprintf (fake_name
, sizeof (fake_name
),
24060 "<bad macro file number %d>", file
);
24062 complaint (_("bad file number in macro information (%d)"),
24065 return xstrdup (fake_name
);
24069 /* Return the full name of file number I in *LH's file name table.
24070 Use COMP_DIR as the name of the current directory of the
24071 compilation. The result is allocated using xmalloc; the caller is
24072 responsible for freeing it. */
24074 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
24076 /* Is the file number a valid index into the line header's file name
24077 table? Remember that file numbers start with one, not zero. */
24078 if (1 <= file
&& file
<= lh
->file_names
.size ())
24080 char *relative
= file_file_name (file
, lh
);
24082 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
24084 return reconcat (relative
, comp_dir
, SLASH_STRING
,
24085 relative
, (char *) NULL
);
24088 return file_file_name (file
, lh
);
24092 static struct macro_source_file
*
24093 macro_start_file (struct dwarf2_cu
*cu
,
24094 int file
, int line
,
24095 struct macro_source_file
*current_file
,
24096 struct line_header
*lh
)
24098 /* File name relative to the compilation directory of this source file. */
24099 char *file_name
= file_file_name (file
, lh
);
24101 if (! current_file
)
24103 /* Note: We don't create a macro table for this compilation unit
24104 at all until we actually get a filename. */
24105 struct macro_table
*macro_table
= cu
->get_builder ()->get_macro_table ();
24107 /* If we have no current file, then this must be the start_file
24108 directive for the compilation unit's main source file. */
24109 current_file
= macro_set_main (macro_table
, file_name
);
24110 macro_define_special (macro_table
);
24113 current_file
= macro_include (current_file
, line
, file_name
);
24117 return current_file
;
24120 static const char *
24121 consume_improper_spaces (const char *p
, const char *body
)
24125 complaint (_("macro definition contains spaces "
24126 "in formal argument list:\n`%s'"),
24138 parse_macro_definition (struct macro_source_file
*file
, int line
,
24143 /* The body string takes one of two forms. For object-like macro
24144 definitions, it should be:
24146 <macro name> " " <definition>
24148 For function-like macro definitions, it should be:
24150 <macro name> "() " <definition>
24152 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
24154 Spaces may appear only where explicitly indicated, and in the
24157 The Dwarf 2 spec says that an object-like macro's name is always
24158 followed by a space, but versions of GCC around March 2002 omit
24159 the space when the macro's definition is the empty string.
24161 The Dwarf 2 spec says that there should be no spaces between the
24162 formal arguments in a function-like macro's formal argument list,
24163 but versions of GCC around March 2002 include spaces after the
24167 /* Find the extent of the macro name. The macro name is terminated
24168 by either a space or null character (for an object-like macro) or
24169 an opening paren (for a function-like macro). */
24170 for (p
= body
; *p
; p
++)
24171 if (*p
== ' ' || *p
== '(')
24174 if (*p
== ' ' || *p
== '\0')
24176 /* It's an object-like macro. */
24177 int name_len
= p
- body
;
24178 char *name
= savestring (body
, name_len
);
24179 const char *replacement
;
24182 replacement
= body
+ name_len
+ 1;
24185 dwarf2_macro_malformed_definition_complaint (body
);
24186 replacement
= body
+ name_len
;
24189 macro_define_object (file
, line
, name
, replacement
);
24193 else if (*p
== '(')
24195 /* It's a function-like macro. */
24196 char *name
= savestring (body
, p
- body
);
24199 char **argv
= XNEWVEC (char *, argv_size
);
24203 p
= consume_improper_spaces (p
, body
);
24205 /* Parse the formal argument list. */
24206 while (*p
&& *p
!= ')')
24208 /* Find the extent of the current argument name. */
24209 const char *arg_start
= p
;
24211 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
24214 if (! *p
|| p
== arg_start
)
24215 dwarf2_macro_malformed_definition_complaint (body
);
24218 /* Make sure argv has room for the new argument. */
24219 if (argc
>= argv_size
)
24222 argv
= XRESIZEVEC (char *, argv
, argv_size
);
24225 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
24228 p
= consume_improper_spaces (p
, body
);
24230 /* Consume the comma, if present. */
24235 p
= consume_improper_spaces (p
, body
);
24244 /* Perfectly formed definition, no complaints. */
24245 macro_define_function (file
, line
, name
,
24246 argc
, (const char **) argv
,
24248 else if (*p
== '\0')
24250 /* Complain, but do define it. */
24251 dwarf2_macro_malformed_definition_complaint (body
);
24252 macro_define_function (file
, line
, name
,
24253 argc
, (const char **) argv
,
24257 /* Just complain. */
24258 dwarf2_macro_malformed_definition_complaint (body
);
24261 /* Just complain. */
24262 dwarf2_macro_malformed_definition_complaint (body
);
24268 for (i
= 0; i
< argc
; i
++)
24274 dwarf2_macro_malformed_definition_complaint (body
);
24277 /* Skip some bytes from BYTES according to the form given in FORM.
24278 Returns the new pointer. */
24280 static const gdb_byte
*
24281 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
24282 enum dwarf_form form
,
24283 unsigned int offset_size
,
24284 struct dwarf2_section_info
*section
)
24286 unsigned int bytes_read
;
24290 case DW_FORM_data1
:
24295 case DW_FORM_data2
:
24299 case DW_FORM_data4
:
24303 case DW_FORM_data8
:
24307 case DW_FORM_data16
:
24311 case DW_FORM_string
:
24312 read_direct_string (abfd
, bytes
, &bytes_read
);
24313 bytes
+= bytes_read
;
24316 case DW_FORM_sec_offset
:
24318 case DW_FORM_GNU_strp_alt
:
24319 bytes
+= offset_size
;
24322 case DW_FORM_block
:
24323 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24324 bytes
+= bytes_read
;
24327 case DW_FORM_block1
:
24328 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24330 case DW_FORM_block2
:
24331 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24333 case DW_FORM_block4
:
24334 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24337 case DW_FORM_addrx
:
24338 case DW_FORM_sdata
:
24340 case DW_FORM_udata
:
24341 case DW_FORM_GNU_addr_index
:
24342 case DW_FORM_GNU_str_index
:
24343 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24346 dwarf2_section_buffer_overflow_complaint (section
);
24351 case DW_FORM_implicit_const
:
24356 complaint (_("invalid form 0x%x in `%s'"),
24357 form
, get_section_name (section
));
24365 /* A helper for dwarf_decode_macros that handles skipping an unknown
24366 opcode. Returns an updated pointer to the macro data buffer; or,
24367 on error, issues a complaint and returns NULL. */
24369 static const gdb_byte
*
24370 skip_unknown_opcode (unsigned int opcode
,
24371 const gdb_byte
**opcode_definitions
,
24372 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24374 unsigned int offset_size
,
24375 struct dwarf2_section_info
*section
)
24377 unsigned int bytes_read
, i
;
24379 const gdb_byte
*defn
;
24381 if (opcode_definitions
[opcode
] == NULL
)
24383 complaint (_("unrecognized DW_MACFINO opcode 0x%x"),
24388 defn
= opcode_definitions
[opcode
];
24389 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24390 defn
+= bytes_read
;
24392 for (i
= 0; i
< arg
; ++i
)
24394 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24395 (enum dwarf_form
) defn
[i
], offset_size
,
24397 if (mac_ptr
== NULL
)
24399 /* skip_form_bytes already issued the complaint. */
24407 /* A helper function which parses the header of a macro section.
24408 If the macro section is the extended (for now called "GNU") type,
24409 then this updates *OFFSET_SIZE. Returns a pointer to just after
24410 the header, or issues a complaint and returns NULL on error. */
24412 static const gdb_byte
*
24413 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24415 const gdb_byte
*mac_ptr
,
24416 unsigned int *offset_size
,
24417 int section_is_gnu
)
24419 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24421 if (section_is_gnu
)
24423 unsigned int version
, flags
;
24425 version
= read_2_bytes (abfd
, mac_ptr
);
24426 if (version
!= 4 && version
!= 5)
24428 complaint (_("unrecognized version `%d' in .debug_macro section"),
24434 flags
= read_1_byte (abfd
, mac_ptr
);
24436 *offset_size
= (flags
& 1) ? 8 : 4;
24438 if ((flags
& 2) != 0)
24439 /* We don't need the line table offset. */
24440 mac_ptr
+= *offset_size
;
24442 /* Vendor opcode descriptions. */
24443 if ((flags
& 4) != 0)
24445 unsigned int i
, count
;
24447 count
= read_1_byte (abfd
, mac_ptr
);
24449 for (i
= 0; i
< count
; ++i
)
24451 unsigned int opcode
, bytes_read
;
24454 opcode
= read_1_byte (abfd
, mac_ptr
);
24456 opcode_definitions
[opcode
] = mac_ptr
;
24457 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24458 mac_ptr
+= bytes_read
;
24467 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24468 including DW_MACRO_import. */
24471 dwarf_decode_macro_bytes (struct dwarf2_cu
*cu
,
24473 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24474 struct macro_source_file
*current_file
,
24475 struct line_header
*lh
,
24476 struct dwarf2_section_info
*section
,
24477 int section_is_gnu
, int section_is_dwz
,
24478 unsigned int offset_size
,
24479 htab_t include_hash
)
24481 struct dwarf2_per_objfile
*dwarf2_per_objfile
24482 = cu
->per_cu
->dwarf2_per_objfile
;
24483 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24484 enum dwarf_macro_record_type macinfo_type
;
24485 int at_commandline
;
24486 const gdb_byte
*opcode_definitions
[256];
24488 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24489 &offset_size
, section_is_gnu
);
24490 if (mac_ptr
== NULL
)
24492 /* We already issued a complaint. */
24496 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24497 GDB is still reading the definitions from command line. First
24498 DW_MACINFO_start_file will need to be ignored as it was already executed
24499 to create CURRENT_FILE for the main source holding also the command line
24500 definitions. On first met DW_MACINFO_start_file this flag is reset to
24501 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24503 at_commandline
= 1;
24507 /* Do we at least have room for a macinfo type byte? */
24508 if (mac_ptr
>= mac_end
)
24510 dwarf2_section_buffer_overflow_complaint (section
);
24514 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24517 /* Note that we rely on the fact that the corresponding GNU and
24518 DWARF constants are the same. */
24520 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24521 switch (macinfo_type
)
24523 /* A zero macinfo type indicates the end of the macro
24528 case DW_MACRO_define
:
24529 case DW_MACRO_undef
:
24530 case DW_MACRO_define_strp
:
24531 case DW_MACRO_undef_strp
:
24532 case DW_MACRO_define_sup
:
24533 case DW_MACRO_undef_sup
:
24535 unsigned int bytes_read
;
24540 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24541 mac_ptr
+= bytes_read
;
24543 if (macinfo_type
== DW_MACRO_define
24544 || macinfo_type
== DW_MACRO_undef
)
24546 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24547 mac_ptr
+= bytes_read
;
24551 LONGEST str_offset
;
24553 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24554 mac_ptr
+= offset_size
;
24556 if (macinfo_type
== DW_MACRO_define_sup
24557 || macinfo_type
== DW_MACRO_undef_sup
24560 struct dwz_file
*dwz
24561 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24563 body
= read_indirect_string_from_dwz (objfile
,
24567 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24571 is_define
= (macinfo_type
== DW_MACRO_define
24572 || macinfo_type
== DW_MACRO_define_strp
24573 || macinfo_type
== DW_MACRO_define_sup
);
24574 if (! current_file
)
24576 /* DWARF violation as no main source is present. */
24577 complaint (_("debug info with no main source gives macro %s "
24579 is_define
? _("definition") : _("undefinition"),
24583 if ((line
== 0 && !at_commandline
)
24584 || (line
!= 0 && at_commandline
))
24585 complaint (_("debug info gives %s macro %s with %s line %d: %s"),
24586 at_commandline
? _("command-line") : _("in-file"),
24587 is_define
? _("definition") : _("undefinition"),
24588 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24592 /* Fedora's rpm-build's "debugedit" binary
24593 corrupted .debug_macro sections.
24596 https://bugzilla.redhat.com/show_bug.cgi?id=1708786 */
24597 complaint (_("debug info gives %s invalid macro %s "
24598 "without body (corrupted?) at line %d "
24600 at_commandline
? _("command-line") : _("in-file"),
24601 is_define
? _("definition") : _("undefinition"),
24602 line
, current_file
->filename
);
24604 else if (is_define
)
24605 parse_macro_definition (current_file
, line
, body
);
24608 gdb_assert (macinfo_type
== DW_MACRO_undef
24609 || macinfo_type
== DW_MACRO_undef_strp
24610 || macinfo_type
== DW_MACRO_undef_sup
);
24611 macro_undef (current_file
, line
, body
);
24616 case DW_MACRO_start_file
:
24618 unsigned int bytes_read
;
24621 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24622 mac_ptr
+= bytes_read
;
24623 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24624 mac_ptr
+= bytes_read
;
24626 if ((line
== 0 && !at_commandline
)
24627 || (line
!= 0 && at_commandline
))
24628 complaint (_("debug info gives source %d included "
24629 "from %s at %s line %d"),
24630 file
, at_commandline
? _("command-line") : _("file"),
24631 line
== 0 ? _("zero") : _("non-zero"), line
);
24633 if (at_commandline
)
24635 /* This DW_MACRO_start_file was executed in the
24637 at_commandline
= 0;
24640 current_file
= macro_start_file (cu
, file
, line
, current_file
,
24645 case DW_MACRO_end_file
:
24646 if (! current_file
)
24647 complaint (_("macro debug info has an unmatched "
24648 "`close_file' directive"));
24651 current_file
= current_file
->included_by
;
24652 if (! current_file
)
24654 enum dwarf_macro_record_type next_type
;
24656 /* GCC circa March 2002 doesn't produce the zero
24657 type byte marking the end of the compilation
24658 unit. Complain if it's not there, but exit no
24661 /* Do we at least have room for a macinfo type byte? */
24662 if (mac_ptr
>= mac_end
)
24664 dwarf2_section_buffer_overflow_complaint (section
);
24668 /* We don't increment mac_ptr here, so this is just
24671 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24673 if (next_type
!= 0)
24674 complaint (_("no terminating 0-type entry for "
24675 "macros in `.debug_macinfo' section"));
24682 case DW_MACRO_import
:
24683 case DW_MACRO_import_sup
:
24687 bfd
*include_bfd
= abfd
;
24688 struct dwarf2_section_info
*include_section
= section
;
24689 const gdb_byte
*include_mac_end
= mac_end
;
24690 int is_dwz
= section_is_dwz
;
24691 const gdb_byte
*new_mac_ptr
;
24693 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24694 mac_ptr
+= offset_size
;
24696 if (macinfo_type
== DW_MACRO_import_sup
)
24698 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24700 dwarf2_read_section (objfile
, &dwz
->macro
);
24702 include_section
= &dwz
->macro
;
24703 include_bfd
= get_section_bfd_owner (include_section
);
24704 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24708 new_mac_ptr
= include_section
->buffer
+ offset
;
24709 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24713 /* This has actually happened; see
24714 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24715 complaint (_("recursive DW_MACRO_import in "
24716 ".debug_macro section"));
24720 *slot
= (void *) new_mac_ptr
;
24722 dwarf_decode_macro_bytes (cu
, include_bfd
, new_mac_ptr
,
24723 include_mac_end
, current_file
, lh
,
24724 section
, section_is_gnu
, is_dwz
,
24725 offset_size
, include_hash
);
24727 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24732 case DW_MACINFO_vendor_ext
:
24733 if (!section_is_gnu
)
24735 unsigned int bytes_read
;
24737 /* This reads the constant, but since we don't recognize
24738 any vendor extensions, we ignore it. */
24739 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24740 mac_ptr
+= bytes_read
;
24741 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24742 mac_ptr
+= bytes_read
;
24744 /* We don't recognize any vendor extensions. */
24750 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24751 mac_ptr
, mac_end
, abfd
, offset_size
,
24753 if (mac_ptr
== NULL
)
24758 } while (macinfo_type
!= 0);
24762 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24763 int section_is_gnu
)
24765 struct dwarf2_per_objfile
*dwarf2_per_objfile
24766 = cu
->per_cu
->dwarf2_per_objfile
;
24767 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24768 struct line_header
*lh
= cu
->line_header
;
24770 const gdb_byte
*mac_ptr
, *mac_end
;
24771 struct macro_source_file
*current_file
= 0;
24772 enum dwarf_macro_record_type macinfo_type
;
24773 unsigned int offset_size
= cu
->header
.offset_size
;
24774 const gdb_byte
*opcode_definitions
[256];
24776 struct dwarf2_section_info
*section
;
24777 const char *section_name
;
24779 if (cu
->dwo_unit
!= NULL
)
24781 if (section_is_gnu
)
24783 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24784 section_name
= ".debug_macro.dwo";
24788 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24789 section_name
= ".debug_macinfo.dwo";
24794 if (section_is_gnu
)
24796 section
= &dwarf2_per_objfile
->macro
;
24797 section_name
= ".debug_macro";
24801 section
= &dwarf2_per_objfile
->macinfo
;
24802 section_name
= ".debug_macinfo";
24806 dwarf2_read_section (objfile
, section
);
24807 if (section
->buffer
== NULL
)
24809 complaint (_("missing %s section"), section_name
);
24812 abfd
= get_section_bfd_owner (section
);
24814 /* First pass: Find the name of the base filename.
24815 This filename is needed in order to process all macros whose definition
24816 (or undefinition) comes from the command line. These macros are defined
24817 before the first DW_MACINFO_start_file entry, and yet still need to be
24818 associated to the base file.
24820 To determine the base file name, we scan the macro definitions until we
24821 reach the first DW_MACINFO_start_file entry. We then initialize
24822 CURRENT_FILE accordingly so that any macro definition found before the
24823 first DW_MACINFO_start_file can still be associated to the base file. */
24825 mac_ptr
= section
->buffer
+ offset
;
24826 mac_end
= section
->buffer
+ section
->size
;
24828 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24829 &offset_size
, section_is_gnu
);
24830 if (mac_ptr
== NULL
)
24832 /* We already issued a complaint. */
24838 /* Do we at least have room for a macinfo type byte? */
24839 if (mac_ptr
>= mac_end
)
24841 /* Complaint is printed during the second pass as GDB will probably
24842 stop the first pass earlier upon finding
24843 DW_MACINFO_start_file. */
24847 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24850 /* Note that we rely on the fact that the corresponding GNU and
24851 DWARF constants are the same. */
24853 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24854 switch (macinfo_type
)
24856 /* A zero macinfo type indicates the end of the macro
24861 case DW_MACRO_define
:
24862 case DW_MACRO_undef
:
24863 /* Only skip the data by MAC_PTR. */
24865 unsigned int bytes_read
;
24867 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24868 mac_ptr
+= bytes_read
;
24869 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24870 mac_ptr
+= bytes_read
;
24874 case DW_MACRO_start_file
:
24876 unsigned int bytes_read
;
24879 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24880 mac_ptr
+= bytes_read
;
24881 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24882 mac_ptr
+= bytes_read
;
24884 current_file
= macro_start_file (cu
, file
, line
, current_file
, lh
);
24888 case DW_MACRO_end_file
:
24889 /* No data to skip by MAC_PTR. */
24892 case DW_MACRO_define_strp
:
24893 case DW_MACRO_undef_strp
:
24894 case DW_MACRO_define_sup
:
24895 case DW_MACRO_undef_sup
:
24897 unsigned int bytes_read
;
24899 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24900 mac_ptr
+= bytes_read
;
24901 mac_ptr
+= offset_size
;
24905 case DW_MACRO_import
:
24906 case DW_MACRO_import_sup
:
24907 /* Note that, according to the spec, a transparent include
24908 chain cannot call DW_MACRO_start_file. So, we can just
24909 skip this opcode. */
24910 mac_ptr
+= offset_size
;
24913 case DW_MACINFO_vendor_ext
:
24914 /* Only skip the data by MAC_PTR. */
24915 if (!section_is_gnu
)
24917 unsigned int bytes_read
;
24919 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24920 mac_ptr
+= bytes_read
;
24921 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24922 mac_ptr
+= bytes_read
;
24927 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24928 mac_ptr
, mac_end
, abfd
, offset_size
,
24930 if (mac_ptr
== NULL
)
24935 } while (macinfo_type
!= 0 && current_file
== NULL
);
24937 /* Second pass: Process all entries.
24939 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24940 command-line macro definitions/undefinitions. This flag is unset when we
24941 reach the first DW_MACINFO_start_file entry. */
24943 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24945 NULL
, xcalloc
, xfree
));
24946 mac_ptr
= section
->buffer
+ offset
;
24947 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24948 *slot
= (void *) mac_ptr
;
24949 dwarf_decode_macro_bytes (cu
, abfd
, mac_ptr
, mac_end
,
24950 current_file
, lh
, section
,
24951 section_is_gnu
, 0, offset_size
,
24952 include_hash
.get ());
24955 /* Check if the attribute's form is a DW_FORM_block*
24956 if so return true else false. */
24959 attr_form_is_block (const struct attribute
*attr
)
24961 return (attr
== NULL
? 0 :
24962 attr
->form
== DW_FORM_block1
24963 || attr
->form
== DW_FORM_block2
24964 || attr
->form
== DW_FORM_block4
24965 || attr
->form
== DW_FORM_block
24966 || attr
->form
== DW_FORM_exprloc
);
24969 /* Return non-zero if ATTR's value is a section offset --- classes
24970 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
24971 You may use DW_UNSND (attr) to retrieve such offsets.
24973 Section 7.5.4, "Attribute Encodings", explains that no attribute
24974 may have a value that belongs to more than one of these classes; it
24975 would be ambiguous if we did, because we use the same forms for all
24979 attr_form_is_section_offset (const struct attribute
*attr
)
24981 return (attr
->form
== DW_FORM_data4
24982 || attr
->form
== DW_FORM_data8
24983 || attr
->form
== DW_FORM_sec_offset
);
24986 /* Return non-zero if ATTR's value falls in the 'constant' class, or
24987 zero otherwise. When this function returns true, you can apply
24988 dwarf2_get_attr_constant_value to it.
24990 However, note that for some attributes you must check
24991 attr_form_is_section_offset before using this test. DW_FORM_data4
24992 and DW_FORM_data8 are members of both the constant class, and of
24993 the classes that contain offsets into other debug sections
24994 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
24995 that, if an attribute's can be either a constant or one of the
24996 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
24997 taken as section offsets, not constants.
24999 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
25000 cannot handle that. */
25003 attr_form_is_constant (const struct attribute
*attr
)
25005 switch (attr
->form
)
25007 case DW_FORM_sdata
:
25008 case DW_FORM_udata
:
25009 case DW_FORM_data1
:
25010 case DW_FORM_data2
:
25011 case DW_FORM_data4
:
25012 case DW_FORM_data8
:
25013 case DW_FORM_implicit_const
:
25021 /* DW_ADDR is always stored already as sect_offset; despite for the forms
25022 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
25025 attr_form_is_ref (const struct attribute
*attr
)
25027 switch (attr
->form
)
25029 case DW_FORM_ref_addr
:
25034 case DW_FORM_ref_udata
:
25035 case DW_FORM_GNU_ref_alt
:
25042 /* Return the .debug_loc section to use for CU.
25043 For DWO files use .debug_loc.dwo. */
25045 static struct dwarf2_section_info
*
25046 cu_debug_loc_section (struct dwarf2_cu
*cu
)
25048 struct dwarf2_per_objfile
*dwarf2_per_objfile
25049 = cu
->per_cu
->dwarf2_per_objfile
;
25053 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
25055 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
25057 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
25058 : &dwarf2_per_objfile
->loc
);
25061 /* A helper function that fills in a dwarf2_loclist_baton. */
25064 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
25065 struct dwarf2_loclist_baton
*baton
,
25066 const struct attribute
*attr
)
25068 struct dwarf2_per_objfile
*dwarf2_per_objfile
25069 = cu
->per_cu
->dwarf2_per_objfile
;
25070 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
25072 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
25074 baton
->per_cu
= cu
->per_cu
;
25075 gdb_assert (baton
->per_cu
);
25076 /* We don't know how long the location list is, but make sure we
25077 don't run off the edge of the section. */
25078 baton
->size
= section
->size
- DW_UNSND (attr
);
25079 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
25080 baton
->base_address
= cu
->base_address
;
25081 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
25085 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
25086 struct dwarf2_cu
*cu
, int is_block
)
25088 struct dwarf2_per_objfile
*dwarf2_per_objfile
25089 = cu
->per_cu
->dwarf2_per_objfile
;
25090 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25091 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
25093 if (attr_form_is_section_offset (attr
)
25094 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
25095 the section. If so, fall through to the complaint in the
25097 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
25099 struct dwarf2_loclist_baton
*baton
;
25101 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
25103 fill_in_loclist_baton (cu
, baton
, attr
);
25105 if (cu
->base_known
== 0)
25106 complaint (_("Location list used without "
25107 "specifying the CU base address."));
25109 SYMBOL_ACLASS_INDEX (sym
) = (is_block
25110 ? dwarf2_loclist_block_index
25111 : dwarf2_loclist_index
);
25112 SYMBOL_LOCATION_BATON (sym
) = baton
;
25116 struct dwarf2_locexpr_baton
*baton
;
25118 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
25119 baton
->per_cu
= cu
->per_cu
;
25120 gdb_assert (baton
->per_cu
);
25122 if (attr_form_is_block (attr
))
25124 /* Note that we're just copying the block's data pointer
25125 here, not the actual data. We're still pointing into the
25126 info_buffer for SYM's objfile; right now we never release
25127 that buffer, but when we do clean up properly this may
25129 baton
->size
= DW_BLOCK (attr
)->size
;
25130 baton
->data
= DW_BLOCK (attr
)->data
;
25134 dwarf2_invalid_attrib_class_complaint ("location description",
25135 SYMBOL_NATURAL_NAME (sym
));
25139 SYMBOL_ACLASS_INDEX (sym
) = (is_block
25140 ? dwarf2_locexpr_block_index
25141 : dwarf2_locexpr_index
);
25142 SYMBOL_LOCATION_BATON (sym
) = baton
;
25146 /* Return the OBJFILE associated with the compilation unit CU. If CU
25147 came from a separate debuginfo file, then the master objfile is
25151 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
25153 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25155 /* Return the master objfile, so that we can report and look up the
25156 correct file containing this variable. */
25157 if (objfile
->separate_debug_objfile_backlink
)
25158 objfile
= objfile
->separate_debug_objfile_backlink
;
25163 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
25164 (CU_HEADERP is unused in such case) or prepare a temporary copy at
25165 CU_HEADERP first. */
25167 static const struct comp_unit_head
*
25168 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
25169 struct dwarf2_per_cu_data
*per_cu
)
25171 const gdb_byte
*info_ptr
;
25174 return &per_cu
->cu
->header
;
25176 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
25178 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
25179 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
25180 rcuh_kind::COMPILE
);
25185 /* Return the address size given in the compilation unit header for CU. */
25188 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
25190 struct comp_unit_head cu_header_local
;
25191 const struct comp_unit_head
*cu_headerp
;
25193 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25195 return cu_headerp
->addr_size
;
25198 /* Return the offset size given in the compilation unit header for CU. */
25201 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
25203 struct comp_unit_head cu_header_local
;
25204 const struct comp_unit_head
*cu_headerp
;
25206 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25208 return cu_headerp
->offset_size
;
25211 /* See its dwarf2loc.h declaration. */
25214 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
25216 struct comp_unit_head cu_header_local
;
25217 const struct comp_unit_head
*cu_headerp
;
25219 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25221 if (cu_headerp
->version
== 2)
25222 return cu_headerp
->addr_size
;
25224 return cu_headerp
->offset_size
;
25227 /* Return the text offset of the CU. The returned offset comes from
25228 this CU's objfile. If this objfile came from a separate debuginfo
25229 file, then the offset may be different from the corresponding
25230 offset in the parent objfile. */
25233 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
25235 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25237 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
25240 /* Return a type that is a generic pointer type, the size of which matches
25241 the address size given in the compilation unit header for PER_CU. */
25242 static struct type
*
25243 dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data
*per_cu
)
25245 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25246 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
25247 struct type
*addr_type
= lookup_pointer_type (void_type
);
25248 int addr_size
= dwarf2_per_cu_addr_size (per_cu
);
25250 if (TYPE_LENGTH (addr_type
) == addr_size
)
25254 = dwarf2_per_cu_addr_sized_int_type (per_cu
, TYPE_UNSIGNED (addr_type
));
25258 /* Return DWARF version number of PER_CU. */
25261 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
25263 return per_cu
->dwarf_version
;
25266 /* Locate the .debug_info compilation unit from CU's objfile which contains
25267 the DIE at OFFSET. Raises an error on failure. */
25269 static struct dwarf2_per_cu_data
*
25270 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
25271 unsigned int offset_in_dwz
,
25272 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25274 struct dwarf2_per_cu_data
*this_cu
;
25278 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
25281 struct dwarf2_per_cu_data
*mid_cu
;
25282 int mid
= low
+ (high
- low
) / 2;
25284 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
25285 if (mid_cu
->is_dwz
> offset_in_dwz
25286 || (mid_cu
->is_dwz
== offset_in_dwz
25287 && mid_cu
->sect_off
+ mid_cu
->length
>= sect_off
))
25292 gdb_assert (low
== high
);
25293 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25294 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
25296 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
25297 error (_("Dwarf Error: could not find partial DIE containing "
25298 "offset %s [in module %s]"),
25299 sect_offset_str (sect_off
),
25300 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
25302 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
25304 return dwarf2_per_objfile
->all_comp_units
[low
-1];
25308 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
25309 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
25310 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
25311 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
25316 /* Initialize dwarf2_cu CU, owned by PER_CU. */
25318 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
25319 : per_cu (per_cu_
),
25321 has_loclist (false),
25322 checked_producer (false),
25323 producer_is_gxx_lt_4_6 (false),
25324 producer_is_gcc_lt_4_3 (false),
25325 producer_is_icc (false),
25326 producer_is_icc_lt_14 (false),
25327 producer_is_codewarrior (false),
25328 processing_has_namespace_info (false)
25333 /* Destroy a dwarf2_cu. */
25335 dwarf2_cu::~dwarf2_cu ()
25340 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
25343 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
25344 enum language pretend_language
)
25346 struct attribute
*attr
;
25348 /* Set the language we're debugging. */
25349 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
25351 set_cu_language (DW_UNSND (attr
), cu
);
25354 cu
->language
= pretend_language
;
25355 cu
->language_defn
= language_def (cu
->language
);
25358 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25361 /* Increase the age counter on each cached compilation unit, and free
25362 any that are too old. */
25365 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25367 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25369 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25370 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25371 while (per_cu
!= NULL
)
25373 per_cu
->cu
->last_used
++;
25374 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25375 dwarf2_mark (per_cu
->cu
);
25376 per_cu
= per_cu
->cu
->read_in_chain
;
25379 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25380 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25381 while (per_cu
!= NULL
)
25383 struct dwarf2_per_cu_data
*next_cu
;
25385 next_cu
= per_cu
->cu
->read_in_chain
;
25387 if (!per_cu
->cu
->mark
)
25390 *last_chain
= next_cu
;
25393 last_chain
= &per_cu
->cu
->read_in_chain
;
25399 /* Remove a single compilation unit from the cache. */
25402 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25404 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25405 struct dwarf2_per_objfile
*dwarf2_per_objfile
25406 = target_per_cu
->dwarf2_per_objfile
;
25408 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25409 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25410 while (per_cu
!= NULL
)
25412 struct dwarf2_per_cu_data
*next_cu
;
25414 next_cu
= per_cu
->cu
->read_in_chain
;
25416 if (per_cu
== target_per_cu
)
25420 *last_chain
= next_cu
;
25424 last_chain
= &per_cu
->cu
->read_in_chain
;
25430 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25431 We store these in a hash table separate from the DIEs, and preserve them
25432 when the DIEs are flushed out of cache.
25434 The CU "per_cu" pointer is needed because offset alone is not enough to
25435 uniquely identify the type. A file may have multiple .debug_types sections,
25436 or the type may come from a DWO file. Furthermore, while it's more logical
25437 to use per_cu->section+offset, with Fission the section with the data is in
25438 the DWO file but we don't know that section at the point we need it.
25439 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25440 because we can enter the lookup routine, get_die_type_at_offset, from
25441 outside this file, and thus won't necessarily have PER_CU->cu.
25442 Fortunately, PER_CU is stable for the life of the objfile. */
25444 struct dwarf2_per_cu_offset_and_type
25446 const struct dwarf2_per_cu_data
*per_cu
;
25447 sect_offset sect_off
;
25451 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25454 per_cu_offset_and_type_hash (const void *item
)
25456 const struct dwarf2_per_cu_offset_and_type
*ofs
25457 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25459 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25462 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25465 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25467 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25468 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25469 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25470 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25472 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25473 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25476 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25477 table if necessary. For convenience, return TYPE.
25479 The DIEs reading must have careful ordering to:
25480 * Not cause infite loops trying to read in DIEs as a prerequisite for
25481 reading current DIE.
25482 * Not trying to dereference contents of still incompletely read in types
25483 while reading in other DIEs.
25484 * Enable referencing still incompletely read in types just by a pointer to
25485 the type without accessing its fields.
25487 Therefore caller should follow these rules:
25488 * Try to fetch any prerequisite types we may need to build this DIE type
25489 before building the type and calling set_die_type.
25490 * After building type call set_die_type for current DIE as soon as
25491 possible before fetching more types to complete the current type.
25492 * Make the type as complete as possible before fetching more types. */
25494 static struct type
*
25495 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25497 struct dwarf2_per_objfile
*dwarf2_per_objfile
25498 = cu
->per_cu
->dwarf2_per_objfile
;
25499 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25500 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25501 struct attribute
*attr
;
25502 struct dynamic_prop prop
;
25504 /* For Ada types, make sure that the gnat-specific data is always
25505 initialized (if not already set). There are a few types where
25506 we should not be doing so, because the type-specific area is
25507 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25508 where the type-specific area is used to store the floatformat).
25509 But this is not a problem, because the gnat-specific information
25510 is actually not needed for these types. */
25511 if (need_gnat_info (cu
)
25512 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25513 && TYPE_CODE (type
) != TYPE_CODE_FLT
25514 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25515 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25516 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25517 && !HAVE_GNAT_AUX_INFO (type
))
25518 INIT_GNAT_SPECIFIC (type
);
25520 /* Read DW_AT_allocated and set in type. */
25521 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25522 if (attr_form_is_block (attr
))
25524 struct type
*prop_type
25525 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
25526 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25527 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25529 else if (attr
!= NULL
)
25531 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25532 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25533 sect_offset_str (die
->sect_off
));
25536 /* Read DW_AT_associated and set in type. */
25537 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25538 if (attr_form_is_block (attr
))
25540 struct type
*prop_type
25541 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
25542 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25543 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25545 else if (attr
!= NULL
)
25547 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
25548 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25549 sect_offset_str (die
->sect_off
));
25552 /* Read DW_AT_data_location and set in type. */
25553 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25554 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
25555 dwarf2_per_cu_addr_type (cu
->per_cu
)))
25556 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25558 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25560 dwarf2_per_objfile
->die_type_hash
=
25561 htab_create_alloc_ex (127,
25562 per_cu_offset_and_type_hash
,
25563 per_cu_offset_and_type_eq
,
25565 &objfile
->objfile_obstack
,
25566 hashtab_obstack_allocate
,
25567 dummy_obstack_deallocate
);
25570 ofs
.per_cu
= cu
->per_cu
;
25571 ofs
.sect_off
= die
->sect_off
;
25573 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25574 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25576 complaint (_("A problem internal to GDB: DIE %s has type already set"),
25577 sect_offset_str (die
->sect_off
));
25578 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25579 struct dwarf2_per_cu_offset_and_type
);
25584 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25585 or return NULL if the die does not have a saved type. */
25587 static struct type
*
25588 get_die_type_at_offset (sect_offset sect_off
,
25589 struct dwarf2_per_cu_data
*per_cu
)
25591 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25592 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25594 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25597 ofs
.per_cu
= per_cu
;
25598 ofs
.sect_off
= sect_off
;
25599 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25600 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25607 /* Look up the type for DIE in CU in die_type_hash,
25608 or return NULL if DIE does not have a saved type. */
25610 static struct type
*
25611 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25613 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25616 /* Add a dependence relationship from CU to REF_PER_CU. */
25619 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25620 struct dwarf2_per_cu_data
*ref_per_cu
)
25624 if (cu
->dependencies
== NULL
)
25626 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25627 NULL
, &cu
->comp_unit_obstack
,
25628 hashtab_obstack_allocate
,
25629 dummy_obstack_deallocate
);
25631 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25633 *slot
= ref_per_cu
;
25636 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25637 Set the mark field in every compilation unit in the
25638 cache that we must keep because we are keeping CU. */
25641 dwarf2_mark_helper (void **slot
, void *data
)
25643 struct dwarf2_per_cu_data
*per_cu
;
25645 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25647 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25648 reading of the chain. As such dependencies remain valid it is not much
25649 useful to track and undo them during QUIT cleanups. */
25650 if (per_cu
->cu
== NULL
)
25653 if (per_cu
->cu
->mark
)
25655 per_cu
->cu
->mark
= true;
25657 if (per_cu
->cu
->dependencies
!= NULL
)
25658 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25663 /* Set the mark field in CU and in every other compilation unit in the
25664 cache that we must keep because we are keeping CU. */
25667 dwarf2_mark (struct dwarf2_cu
*cu
)
25672 if (cu
->dependencies
!= NULL
)
25673 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25677 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25681 per_cu
->cu
->mark
= false;
25682 per_cu
= per_cu
->cu
->read_in_chain
;
25686 /* Trivial hash function for partial_die_info: the hash value of a DIE
25687 is its offset in .debug_info for this objfile. */
25690 partial_die_hash (const void *item
)
25692 const struct partial_die_info
*part_die
25693 = (const struct partial_die_info
*) item
;
25695 return to_underlying (part_die
->sect_off
);
25698 /* Trivial comparison function for partial_die_info structures: two DIEs
25699 are equal if they have the same offset. */
25702 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25704 const struct partial_die_info
*part_die_lhs
25705 = (const struct partial_die_info
*) item_lhs
;
25706 const struct partial_die_info
*part_die_rhs
25707 = (const struct partial_die_info
*) item_rhs
;
25709 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25712 struct cmd_list_element
*set_dwarf_cmdlist
;
25713 struct cmd_list_element
*show_dwarf_cmdlist
;
25716 set_dwarf_cmd (const char *args
, int from_tty
)
25718 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25723 show_dwarf_cmd (const char *args
, int from_tty
)
25725 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25728 int dwarf_always_disassemble
;
25731 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25732 struct cmd_list_element
*c
, const char *value
)
25734 fprintf_filtered (file
,
25735 _("Whether to always disassemble "
25736 "DWARF expressions is %s.\n"),
25741 show_check_physname (struct ui_file
*file
, int from_tty
,
25742 struct cmd_list_element
*c
, const char *value
)
25744 fprintf_filtered (file
,
25745 _("Whether to check \"physname\" is %s.\n"),
25750 _initialize_dwarf2_read (void)
25752 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25753 Set DWARF specific variables.\n\
25754 Configure DWARF variables such as the cache size."),
25755 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25756 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25758 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25759 Show DWARF specific variables.\n\
25760 Show DWARF variables such as the cache size."),
25761 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25762 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25764 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25765 &dwarf_max_cache_age
, _("\
25766 Set the upper bound on the age of cached DWARF compilation units."), _("\
25767 Show the upper bound on the age of cached DWARF compilation units."), _("\
25768 A higher limit means that cached compilation units will be stored\n\
25769 in memory longer, and more total memory will be used. Zero disables\n\
25770 caching, which can slow down startup."),
25772 show_dwarf_max_cache_age
,
25773 &set_dwarf_cmdlist
,
25774 &show_dwarf_cmdlist
);
25776 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25777 &dwarf_always_disassemble
, _("\
25778 Set whether `info address' always disassembles DWARF expressions."), _("\
25779 Show whether `info address' always disassembles DWARF expressions."), _("\
25780 When enabled, DWARF expressions are always printed in an assembly-like\n\
25781 syntax. When disabled, expressions will be printed in a more\n\
25782 conversational style, when possible."),
25784 show_dwarf_always_disassemble
,
25785 &set_dwarf_cmdlist
,
25786 &show_dwarf_cmdlist
);
25788 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25789 Set debugging of the DWARF reader."), _("\
25790 Show debugging of the DWARF reader."), _("\
25791 When enabled (non-zero), debugging messages are printed during DWARF\n\
25792 reading and symtab expansion. A value of 1 (one) provides basic\n\
25793 information. A value greater than 1 provides more verbose information."),
25796 &setdebuglist
, &showdebuglist
);
25798 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25799 Set debugging of the DWARF DIE reader."), _("\
25800 Show debugging of the DWARF DIE reader."), _("\
25801 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25802 The value is the maximum depth to print."),
25805 &setdebuglist
, &showdebuglist
);
25807 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25808 Set debugging of the dwarf line reader."), _("\
25809 Show debugging of the dwarf line reader."), _("\
25810 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25811 A value of 1 (one) provides basic information.\n\
25812 A value greater than 1 provides more verbose information."),
25815 &setdebuglist
, &showdebuglist
);
25817 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25818 Set cross-checking of \"physname\" code against demangler."), _("\
25819 Show cross-checking of \"physname\" code against demangler."), _("\
25820 When enabled, GDB's internal \"physname\" code is checked against\n\
25822 NULL
, show_check_physname
,
25823 &setdebuglist
, &showdebuglist
);
25825 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25826 no_class
, &use_deprecated_index_sections
, _("\
25827 Set whether to use deprecated gdb_index sections."), _("\
25828 Show whether to use deprecated gdb_index sections."), _("\
25829 When enabled, deprecated .gdb_index sections are used anyway.\n\
25830 Normally they are ignored either because of a missing feature or\n\
25831 performance issue.\n\
25832 Warning: This option must be enabled before gdb reads the file."),
25835 &setlist
, &showlist
);
25837 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25838 &dwarf2_locexpr_funcs
);
25839 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25840 &dwarf2_loclist_funcs
);
25842 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25843 &dwarf2_block_frame_base_locexpr_funcs
);
25844 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25845 &dwarf2_block_frame_base_loclist_funcs
);
25848 selftests::register_test ("dw2_expand_symtabs_matching",
25849 selftests::dw2_expand_symtabs_matching::run_test
);