1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2019 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
32 #include "dwarf2read.h"
33 #include "dwarf-index-cache.h"
34 #include "dwarf-index-common.h"
43 #include "gdb-demangle.h"
44 #include "expression.h"
45 #include "filenames.h" /* for DOSish file names */
48 #include "complaints.h"
49 #include "dwarf2expr.h"
50 #include "dwarf2loc.h"
51 #include "cp-support.h"
57 #include "typeprint.h"
60 #include "completer.h"
61 #include "common/vec.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
71 #include "common/filestuff.h"
73 #include "namespace.h"
74 #include "common/gdb_unlinker.h"
75 #include "common/function-view.h"
76 #include "common/gdb_optional.h"
77 #include "common/underlying.h"
78 #include "common/byte-vector.h"
79 #include "common/hash_enum.h"
80 #include "filename-seen-cache.h"
83 #include <sys/types.h>
85 #include <unordered_set>
86 #include <unordered_map>
87 #include "common/selftest.h"
90 #include <forward_list>
91 #include "rust-lang.h"
92 #include "common/pathstuff.h"
94 /* When == 1, print basic high level tracing messages.
95 When > 1, be more verbose.
96 This is in contrast to the low level DIE reading of dwarf_die_debug. */
97 static unsigned int dwarf_read_debug
= 0;
99 /* When non-zero, dump DIEs after they are read in. */
100 static unsigned int dwarf_die_debug
= 0;
102 /* When non-zero, dump line number entries as they are read in. */
103 static unsigned int dwarf_line_debug
= 0;
105 /* When non-zero, cross-check physname against demangler. */
106 static int check_physname
= 0;
108 /* When non-zero, do not reject deprecated .gdb_index sections. */
109 static int use_deprecated_index_sections
= 0;
111 static const struct objfile_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
113 /* The "aclass" indices for various kinds of computed DWARF symbols. */
115 static int dwarf2_locexpr_index
;
116 static int dwarf2_loclist_index
;
117 static int dwarf2_locexpr_block_index
;
118 static int dwarf2_loclist_block_index
;
120 /* An index into a (C++) symbol name component in a symbol name as
121 recorded in the mapped_index's symbol table. For each C++ symbol
122 in the symbol table, we record one entry for the start of each
123 component in the symbol in a table of name components, and then
124 sort the table, in order to be able to binary search symbol names,
125 ignoring leading namespaces, both completion and regular look up.
126 For example, for symbol "A::B::C", we'll have an entry that points
127 to "A::B::C", another that points to "B::C", and another for "C".
128 Note that function symbols in GDB index have no parameter
129 information, just the function/method names. You can convert a
130 name_component to a "const char *" using the
131 'mapped_index::symbol_name_at(offset_type)' method. */
133 struct name_component
135 /* Offset in the symbol name where the component starts. Stored as
136 a (32-bit) offset instead of a pointer to save memory and improve
137 locality on 64-bit architectures. */
138 offset_type name_offset
;
140 /* The symbol's index in the symbol and constant pool tables of a
145 /* Base class containing bits shared by both .gdb_index and
146 .debug_name indexes. */
148 struct mapped_index_base
150 mapped_index_base () = default;
151 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
153 /* The name_component table (a sorted vector). See name_component's
154 description above. */
155 std::vector
<name_component
> name_components
;
157 /* How NAME_COMPONENTS is sorted. */
158 enum case_sensitivity name_components_casing
;
160 /* Return the number of names in the symbol table. */
161 virtual size_t symbol_name_count () const = 0;
163 /* Get the name of the symbol at IDX in the symbol table. */
164 virtual const char *symbol_name_at (offset_type idx
) const = 0;
166 /* Return whether the name at IDX in the symbol table should be
168 virtual bool symbol_name_slot_invalid (offset_type idx
) const
173 /* Build the symbol name component sorted vector, if we haven't
175 void build_name_components ();
177 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
178 possible matches for LN_NO_PARAMS in the name component
180 std::pair
<std::vector
<name_component
>::const_iterator
,
181 std::vector
<name_component
>::const_iterator
>
182 find_name_components_bounds (const lookup_name_info
&ln_no_params
) const;
184 /* Prevent deleting/destroying via a base class pointer. */
186 ~mapped_index_base() = default;
189 /* A description of the mapped index. The file format is described in
190 a comment by the code that writes the index. */
191 struct mapped_index final
: public mapped_index_base
193 /* A slot/bucket in the symbol table hash. */
194 struct symbol_table_slot
196 const offset_type name
;
197 const offset_type vec
;
200 /* Index data format version. */
203 /* The address table data. */
204 gdb::array_view
<const gdb_byte
> address_table
;
206 /* The symbol table, implemented as a hash table. */
207 gdb::array_view
<symbol_table_slot
> symbol_table
;
209 /* A pointer to the constant pool. */
210 const char *constant_pool
= nullptr;
212 bool symbol_name_slot_invalid (offset_type idx
) const override
214 const auto &bucket
= this->symbol_table
[idx
];
215 return bucket
.name
== 0 && bucket
.vec
== 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
);
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 /* Class, the destructor of which frees all allocated queue entries. This
1894 will only have work to do if an error was thrown while processing the
1895 dwarf. If no error was thrown then the queue entries should have all
1896 been processed, and freed, as we went along. */
1898 class dwarf2_queue_guard
1901 dwarf2_queue_guard () = default;
1903 /* Free any entries remaining on the queue. There should only be
1904 entries left if we hit an error while processing the dwarf. */
1905 ~dwarf2_queue_guard ()
1907 struct dwarf2_queue_item
*item
, *last
;
1909 item
= dwarf2_queue
;
1912 /* Anything still marked queued is likely to be in an
1913 inconsistent state, so discard it. */
1914 if (item
->per_cu
->queued
)
1916 if (item
->per_cu
->cu
!= NULL
)
1917 free_one_cached_comp_unit (item
->per_cu
);
1918 item
->per_cu
->queued
= 0;
1926 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
1930 /* The return type of find_file_and_directory. Note, the enclosed
1931 string pointers are only valid while this object is valid. */
1933 struct file_and_directory
1935 /* The filename. This is never NULL. */
1938 /* The compilation directory. NULL if not known. If we needed to
1939 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1940 points directly to the DW_AT_comp_dir string attribute owned by
1941 the obstack that owns the DIE. */
1942 const char *comp_dir
;
1944 /* If we needed to build a new string for comp_dir, this is what
1945 owns the storage. */
1946 std::string comp_dir_storage
;
1949 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1950 struct dwarf2_cu
*cu
);
1952 static char *file_full_name (int file
, struct line_header
*lh
,
1953 const char *comp_dir
);
1955 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1956 enum class rcuh_kind
{ COMPILE
, TYPE
};
1958 static const gdb_byte
*read_and_check_comp_unit_head
1959 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1960 struct comp_unit_head
*header
,
1961 struct dwarf2_section_info
*section
,
1962 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1963 rcuh_kind section_kind
);
1965 static void init_cutu_and_read_dies
1966 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1967 int use_existing_cu
, int keep
, bool skip_partial
,
1968 die_reader_func_ftype
*die_reader_func
, void *data
);
1970 static void init_cutu_and_read_dies_simple
1971 (struct dwarf2_per_cu_data
*this_cu
,
1972 die_reader_func_ftype
*die_reader_func
, void *data
);
1974 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1976 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1978 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1979 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1980 struct dwp_file
*dwp_file
, const char *comp_dir
,
1981 ULONGEST signature
, int is_debug_types
);
1983 static struct dwp_file
*get_dwp_file
1984 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1986 static struct dwo_unit
*lookup_dwo_comp_unit
1987 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1989 static struct dwo_unit
*lookup_dwo_type_unit
1990 (struct signatured_type
*, const char *, const char *);
1992 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1994 /* A unique pointer to a dwo_file. */
1996 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1998 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2000 static void check_producer (struct dwarf2_cu
*cu
);
2002 static void free_line_header_voidp (void *arg
);
2004 /* Various complaints about symbol reading that don't abort the process. */
2007 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2009 complaint (_("statement list doesn't fit in .debug_line section"));
2013 dwarf2_debug_line_missing_file_complaint (void)
2015 complaint (_(".debug_line section has line data without a file"));
2019 dwarf2_debug_line_missing_end_sequence_complaint (void)
2021 complaint (_(".debug_line section has line "
2022 "program sequence without an end"));
2026 dwarf2_complex_location_expr_complaint (void)
2028 complaint (_("location expression too complex"));
2032 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2035 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
2040 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2042 complaint (_("debug info runs off end of %s section"
2044 get_section_name (section
),
2045 get_section_file_name (section
));
2049 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2051 complaint (_("macro debug info contains a "
2052 "malformed macro definition:\n`%s'"),
2057 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2059 complaint (_("invalid attribute class or form for '%s' in '%s'"),
2063 /* Hash function for line_header_hash. */
2066 line_header_hash (const struct line_header
*ofs
)
2068 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2071 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2074 line_header_hash_voidp (const void *item
)
2076 const struct line_header
*ofs
= (const struct line_header
*) item
;
2078 return line_header_hash (ofs
);
2081 /* Equality function for line_header_hash. */
2084 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2086 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2087 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2089 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2090 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2095 /* Read the given attribute value as an address, taking the attribute's
2096 form into account. */
2099 attr_value_as_address (struct attribute
*attr
)
2103 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_addrx
2104 && attr
->form
!= DW_FORM_GNU_addr_index
)
2106 /* Aside from a few clearly defined exceptions, attributes that
2107 contain an address must always be in DW_FORM_addr form.
2108 Unfortunately, some compilers happen to be violating this
2109 requirement by encoding addresses using other forms, such
2110 as DW_FORM_data4 for example. For those broken compilers,
2111 we try to do our best, without any guarantee of success,
2112 to interpret the address correctly. It would also be nice
2113 to generate a complaint, but that would require us to maintain
2114 a list of legitimate cases where a non-address form is allowed,
2115 as well as update callers to pass in at least the CU's DWARF
2116 version. This is more overhead than what we're willing to
2117 expand for a pretty rare case. */
2118 addr
= DW_UNSND (attr
);
2121 addr
= DW_ADDR (attr
);
2126 /* See declaration. */
2128 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2129 const dwarf2_debug_sections
*names
)
2130 : objfile (objfile_
)
2133 names
= &dwarf2_elf_names
;
2135 bfd
*obfd
= objfile
->obfd
;
2137 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2138 locate_sections (obfd
, sec
, *names
);
2141 dwarf2_per_objfile::~dwarf2_per_objfile ()
2143 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2144 free_cached_comp_units ();
2146 if (quick_file_names_table
)
2147 htab_delete (quick_file_names_table
);
2149 if (line_header_hash
)
2150 htab_delete (line_header_hash
);
2152 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2153 VEC_free (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
);
2155 for (signatured_type
*sig_type
: all_type_units
)
2156 VEC_free (dwarf2_per_cu_ptr
, sig_type
->per_cu
.imported_symtabs
);
2158 /* Everything else should be on the objfile obstack. */
2161 /* See declaration. */
2164 dwarf2_per_objfile::free_cached_comp_units ()
2166 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2167 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2168 while (per_cu
!= NULL
)
2170 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2173 *last_chain
= next_cu
;
2178 /* A helper class that calls free_cached_comp_units on
2181 class free_cached_comp_units
2185 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2186 : m_per_objfile (per_objfile
)
2190 ~free_cached_comp_units ()
2192 m_per_objfile
->free_cached_comp_units ();
2195 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2199 dwarf2_per_objfile
*m_per_objfile
;
2202 /* Try to locate the sections we need for DWARF 2 debugging
2203 information and return true if we have enough to do something.
2204 NAMES points to the dwarf2 section names, or is NULL if the standard
2205 ELF names are used. */
2208 dwarf2_has_info (struct objfile
*objfile
,
2209 const struct dwarf2_debug_sections
*names
)
2211 if (objfile
->flags
& OBJF_READNEVER
)
2214 struct dwarf2_per_objfile
*dwarf2_per_objfile
2215 = get_dwarf2_per_objfile (objfile
);
2217 if (dwarf2_per_objfile
== NULL
)
2218 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
2221 return (!dwarf2_per_objfile
->info
.is_virtual
2222 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2223 && !dwarf2_per_objfile
->abbrev
.is_virtual
2224 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2227 /* Return the containing section of virtual section SECTION. */
2229 static struct dwarf2_section_info
*
2230 get_containing_section (const struct dwarf2_section_info
*section
)
2232 gdb_assert (section
->is_virtual
);
2233 return section
->s
.containing_section
;
2236 /* Return the bfd owner of SECTION. */
2239 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2241 if (section
->is_virtual
)
2243 section
= get_containing_section (section
);
2244 gdb_assert (!section
->is_virtual
);
2246 return section
->s
.section
->owner
;
2249 /* Return the bfd section of SECTION.
2250 Returns NULL if the section is not present. */
2253 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2255 if (section
->is_virtual
)
2257 section
= get_containing_section (section
);
2258 gdb_assert (!section
->is_virtual
);
2260 return section
->s
.section
;
2263 /* Return the name of SECTION. */
2266 get_section_name (const struct dwarf2_section_info
*section
)
2268 asection
*sectp
= get_section_bfd_section (section
);
2270 gdb_assert (sectp
!= NULL
);
2271 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2274 /* Return the name of the file SECTION is in. */
2277 get_section_file_name (const struct dwarf2_section_info
*section
)
2279 bfd
*abfd
= get_section_bfd_owner (section
);
2281 return bfd_get_filename (abfd
);
2284 /* Return the id of SECTION.
2285 Returns 0 if SECTION doesn't exist. */
2288 get_section_id (const struct dwarf2_section_info
*section
)
2290 asection
*sectp
= get_section_bfd_section (section
);
2297 /* Return the flags of SECTION.
2298 SECTION (or containing section if this is a virtual section) must exist. */
2301 get_section_flags (const struct dwarf2_section_info
*section
)
2303 asection
*sectp
= get_section_bfd_section (section
);
2305 gdb_assert (sectp
!= NULL
);
2306 return bfd_get_section_flags (sectp
->owner
, sectp
);
2309 /* When loading sections, we look either for uncompressed section or for
2310 compressed section names. */
2313 section_is_p (const char *section_name
,
2314 const struct dwarf2_section_names
*names
)
2316 if (names
->normal
!= NULL
2317 && strcmp (section_name
, names
->normal
) == 0)
2319 if (names
->compressed
!= NULL
2320 && strcmp (section_name
, names
->compressed
) == 0)
2325 /* See declaration. */
2328 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2329 const dwarf2_debug_sections
&names
)
2331 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2333 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2336 else if (section_is_p (sectp
->name
, &names
.info
))
2338 this->info
.s
.section
= sectp
;
2339 this->info
.size
= bfd_get_section_size (sectp
);
2341 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2343 this->abbrev
.s
.section
= sectp
;
2344 this->abbrev
.size
= bfd_get_section_size (sectp
);
2346 else if (section_is_p (sectp
->name
, &names
.line
))
2348 this->line
.s
.section
= sectp
;
2349 this->line
.size
= bfd_get_section_size (sectp
);
2351 else if (section_is_p (sectp
->name
, &names
.loc
))
2353 this->loc
.s
.section
= sectp
;
2354 this->loc
.size
= bfd_get_section_size (sectp
);
2356 else if (section_is_p (sectp
->name
, &names
.loclists
))
2358 this->loclists
.s
.section
= sectp
;
2359 this->loclists
.size
= bfd_get_section_size (sectp
);
2361 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2363 this->macinfo
.s
.section
= sectp
;
2364 this->macinfo
.size
= bfd_get_section_size (sectp
);
2366 else if (section_is_p (sectp
->name
, &names
.macro
))
2368 this->macro
.s
.section
= sectp
;
2369 this->macro
.size
= bfd_get_section_size (sectp
);
2371 else if (section_is_p (sectp
->name
, &names
.str
))
2373 this->str
.s
.section
= sectp
;
2374 this->str
.size
= bfd_get_section_size (sectp
);
2376 else if (section_is_p (sectp
->name
, &names
.line_str
))
2378 this->line_str
.s
.section
= sectp
;
2379 this->line_str
.size
= bfd_get_section_size (sectp
);
2381 else if (section_is_p (sectp
->name
, &names
.addr
))
2383 this->addr
.s
.section
= sectp
;
2384 this->addr
.size
= bfd_get_section_size (sectp
);
2386 else if (section_is_p (sectp
->name
, &names
.frame
))
2388 this->frame
.s
.section
= sectp
;
2389 this->frame
.size
= bfd_get_section_size (sectp
);
2391 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2393 this->eh_frame
.s
.section
= sectp
;
2394 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2396 else if (section_is_p (sectp
->name
, &names
.ranges
))
2398 this->ranges
.s
.section
= sectp
;
2399 this->ranges
.size
= bfd_get_section_size (sectp
);
2401 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2403 this->rnglists
.s
.section
= sectp
;
2404 this->rnglists
.size
= bfd_get_section_size (sectp
);
2406 else if (section_is_p (sectp
->name
, &names
.types
))
2408 struct dwarf2_section_info type_section
;
2410 memset (&type_section
, 0, sizeof (type_section
));
2411 type_section
.s
.section
= sectp
;
2412 type_section
.size
= bfd_get_section_size (sectp
);
2414 this->types
.push_back (type_section
);
2416 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2418 this->gdb_index
.s
.section
= sectp
;
2419 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2421 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2423 this->debug_names
.s
.section
= sectp
;
2424 this->debug_names
.size
= bfd_get_section_size (sectp
);
2426 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2428 this->debug_aranges
.s
.section
= sectp
;
2429 this->debug_aranges
.size
= bfd_get_section_size (sectp
);
2432 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2433 && bfd_section_vma (abfd
, sectp
) == 0)
2434 this->has_section_at_zero
= true;
2437 /* A helper function that decides whether a section is empty,
2441 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2443 if (section
->is_virtual
)
2444 return section
->size
== 0;
2445 return section
->s
.section
== NULL
|| section
->size
== 0;
2448 /* See dwarf2read.h. */
2451 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2455 gdb_byte
*buf
, *retbuf
;
2459 info
->buffer
= NULL
;
2460 info
->readin
= true;
2462 if (dwarf2_section_empty_p (info
))
2465 sectp
= get_section_bfd_section (info
);
2467 /* If this is a virtual section we need to read in the real one first. */
2468 if (info
->is_virtual
)
2470 struct dwarf2_section_info
*containing_section
=
2471 get_containing_section (info
);
2473 gdb_assert (sectp
!= NULL
);
2474 if ((sectp
->flags
& SEC_RELOC
) != 0)
2476 error (_("Dwarf Error: DWP format V2 with relocations is not"
2477 " supported in section %s [in module %s]"),
2478 get_section_name (info
), get_section_file_name (info
));
2480 dwarf2_read_section (objfile
, containing_section
);
2481 /* Other code should have already caught virtual sections that don't
2483 gdb_assert (info
->virtual_offset
+ info
->size
2484 <= containing_section
->size
);
2485 /* If the real section is empty or there was a problem reading the
2486 section we shouldn't get here. */
2487 gdb_assert (containing_section
->buffer
!= NULL
);
2488 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2492 /* If the section has relocations, we must read it ourselves.
2493 Otherwise we attach it to the BFD. */
2494 if ((sectp
->flags
& SEC_RELOC
) == 0)
2496 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2500 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2503 /* When debugging .o files, we may need to apply relocations; see
2504 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2505 We never compress sections in .o files, so we only need to
2506 try this when the section is not compressed. */
2507 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2510 info
->buffer
= retbuf
;
2514 abfd
= get_section_bfd_owner (info
);
2515 gdb_assert (abfd
!= NULL
);
2517 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2518 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2520 error (_("Dwarf Error: Can't read DWARF data"
2521 " in section %s [in module %s]"),
2522 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2526 /* A helper function that returns the size of a section in a safe way.
2527 If you are positive that the section has been read before using the
2528 size, then it is safe to refer to the dwarf2_section_info object's
2529 "size" field directly. In other cases, you must call this
2530 function, because for compressed sections the size field is not set
2531 correctly until the section has been read. */
2533 static bfd_size_type
2534 dwarf2_section_size (struct objfile
*objfile
,
2535 struct dwarf2_section_info
*info
)
2538 dwarf2_read_section (objfile
, info
);
2542 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2546 dwarf2_get_section_info (struct objfile
*objfile
,
2547 enum dwarf2_section_enum sect
,
2548 asection
**sectp
, const gdb_byte
**bufp
,
2549 bfd_size_type
*sizep
)
2551 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
2552 struct dwarf2_section_info
*info
;
2554 /* We may see an objfile without any DWARF, in which case we just
2565 case DWARF2_DEBUG_FRAME
:
2566 info
= &data
->frame
;
2568 case DWARF2_EH_FRAME
:
2569 info
= &data
->eh_frame
;
2572 gdb_assert_not_reached ("unexpected section");
2575 dwarf2_read_section (objfile
, info
);
2577 *sectp
= get_section_bfd_section (info
);
2578 *bufp
= info
->buffer
;
2579 *sizep
= info
->size
;
2582 /* A helper function to find the sections for a .dwz file. */
2585 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2587 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2589 /* Note that we only support the standard ELF names, because .dwz
2590 is ELF-only (at the time of writing). */
2591 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2593 dwz_file
->abbrev
.s
.section
= sectp
;
2594 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2596 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2598 dwz_file
->info
.s
.section
= sectp
;
2599 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2601 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2603 dwz_file
->str
.s
.section
= sectp
;
2604 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2606 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2608 dwz_file
->line
.s
.section
= sectp
;
2609 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2611 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2613 dwz_file
->macro
.s
.section
= sectp
;
2614 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2616 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2618 dwz_file
->gdb_index
.s
.section
= sectp
;
2619 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2621 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2623 dwz_file
->debug_names
.s
.section
= sectp
;
2624 dwz_file
->debug_names
.size
= bfd_get_section_size (sectp
);
2628 /* See dwarf2read.h. */
2631 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2633 const char *filename
;
2634 bfd_size_type buildid_len_arg
;
2638 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2639 return dwarf2_per_objfile
->dwz_file
.get ();
2641 bfd_set_error (bfd_error_no_error
);
2642 gdb::unique_xmalloc_ptr
<char> data
2643 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2644 &buildid_len_arg
, &buildid
));
2647 if (bfd_get_error () == bfd_error_no_error
)
2649 error (_("could not read '.gnu_debugaltlink' section: %s"),
2650 bfd_errmsg (bfd_get_error ()));
2653 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2655 buildid_len
= (size_t) buildid_len_arg
;
2657 filename
= data
.get ();
2659 std::string abs_storage
;
2660 if (!IS_ABSOLUTE_PATH (filename
))
2662 gdb::unique_xmalloc_ptr
<char> abs
2663 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2665 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2666 filename
= abs_storage
.c_str ();
2669 /* First try the file name given in the section. If that doesn't
2670 work, try to use the build-id instead. */
2671 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2672 if (dwz_bfd
!= NULL
)
2674 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2675 dwz_bfd
.reset (nullptr);
2678 if (dwz_bfd
== NULL
)
2679 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2681 if (dwz_bfd
== NULL
)
2682 error (_("could not find '.gnu_debugaltlink' file for %s"),
2683 objfile_name (dwarf2_per_objfile
->objfile
));
2685 std::unique_ptr
<struct dwz_file
> result
2686 (new struct dwz_file (std::move (dwz_bfd
)));
2688 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2691 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2692 result
->dwz_bfd
.get ());
2693 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2694 return dwarf2_per_objfile
->dwz_file
.get ();
2697 /* DWARF quick_symbols_functions support. */
2699 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2700 unique line tables, so we maintain a separate table of all .debug_line
2701 derived entries to support the sharing.
2702 All the quick functions need is the list of file names. We discard the
2703 line_header when we're done and don't need to record it here. */
2704 struct quick_file_names
2706 /* The data used to construct the hash key. */
2707 struct stmt_list_hash hash
;
2709 /* The number of entries in file_names, real_names. */
2710 unsigned int num_file_names
;
2712 /* The file names from the line table, after being run through
2714 const char **file_names
;
2716 /* The file names from the line table after being run through
2717 gdb_realpath. These are computed lazily. */
2718 const char **real_names
;
2721 /* When using the index (and thus not using psymtabs), each CU has an
2722 object of this type. This is used to hold information needed by
2723 the various "quick" methods. */
2724 struct dwarf2_per_cu_quick_data
2726 /* The file table. This can be NULL if there was no file table
2727 or it's currently not read in.
2728 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2729 struct quick_file_names
*file_names
;
2731 /* The corresponding symbol table. This is NULL if symbols for this
2732 CU have not yet been read. */
2733 struct compunit_symtab
*compunit_symtab
;
2735 /* A temporary mark bit used when iterating over all CUs in
2736 expand_symtabs_matching. */
2737 unsigned int mark
: 1;
2739 /* True if we've tried to read the file table and found there isn't one.
2740 There will be no point in trying to read it again next time. */
2741 unsigned int no_file_data
: 1;
2744 /* Utility hash function for a stmt_list_hash. */
2747 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2751 if (stmt_list_hash
->dwo_unit
!= NULL
)
2752 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2753 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2757 /* Utility equality function for a stmt_list_hash. */
2760 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2761 const struct stmt_list_hash
*rhs
)
2763 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2765 if (lhs
->dwo_unit
!= NULL
2766 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2769 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2772 /* Hash function for a quick_file_names. */
2775 hash_file_name_entry (const void *e
)
2777 const struct quick_file_names
*file_data
2778 = (const struct quick_file_names
*) e
;
2780 return hash_stmt_list_entry (&file_data
->hash
);
2783 /* Equality function for a quick_file_names. */
2786 eq_file_name_entry (const void *a
, const void *b
)
2788 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2789 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2791 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2794 /* Delete function for a quick_file_names. */
2797 delete_file_name_entry (void *e
)
2799 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2802 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2804 xfree ((void*) file_data
->file_names
[i
]);
2805 if (file_data
->real_names
)
2806 xfree ((void*) file_data
->real_names
[i
]);
2809 /* The space for the struct itself lives on objfile_obstack,
2810 so we don't free it here. */
2813 /* Create a quick_file_names hash table. */
2816 create_quick_file_names_table (unsigned int nr_initial_entries
)
2818 return htab_create_alloc (nr_initial_entries
,
2819 hash_file_name_entry
, eq_file_name_entry
,
2820 delete_file_name_entry
, xcalloc
, xfree
);
2823 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2824 have to be created afterwards. You should call age_cached_comp_units after
2825 processing PER_CU->CU. dw2_setup must have been already called. */
2828 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2830 if (per_cu
->is_debug_types
)
2831 load_full_type_unit (per_cu
);
2833 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2835 if (per_cu
->cu
== NULL
)
2836 return; /* Dummy CU. */
2838 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2841 /* Read in the symbols for PER_CU. */
2844 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2846 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2848 /* Skip type_unit_groups, reading the type units they contain
2849 is handled elsewhere. */
2850 if (IS_TYPE_UNIT_GROUP (per_cu
))
2853 /* The destructor of dwarf2_queue_guard frees any entries left on
2854 the queue. After this point we're guaranteed to leave this function
2855 with the dwarf queue empty. */
2856 dwarf2_queue_guard q_guard
;
2858 if (dwarf2_per_objfile
->using_index
2859 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2860 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2862 queue_comp_unit (per_cu
, language_minimal
);
2863 load_cu (per_cu
, skip_partial
);
2865 /* If we just loaded a CU from a DWO, and we're working with an index
2866 that may badly handle TUs, load all the TUs in that DWO as well.
2867 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2868 if (!per_cu
->is_debug_types
2869 && per_cu
->cu
!= NULL
2870 && per_cu
->cu
->dwo_unit
!= NULL
2871 && dwarf2_per_objfile
->index_table
!= NULL
2872 && dwarf2_per_objfile
->index_table
->version
<= 7
2873 /* DWP files aren't supported yet. */
2874 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2875 queue_and_load_all_dwo_tus (per_cu
);
2878 process_queue (dwarf2_per_objfile
);
2880 /* Age the cache, releasing compilation units that have not
2881 been used recently. */
2882 age_cached_comp_units (dwarf2_per_objfile
);
2885 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2886 the objfile from which this CU came. Returns the resulting symbol
2889 static struct compunit_symtab
*
2890 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2892 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2894 gdb_assert (dwarf2_per_objfile
->using_index
);
2895 if (!per_cu
->v
.quick
->compunit_symtab
)
2897 free_cached_comp_units
freer (dwarf2_per_objfile
);
2898 scoped_restore decrementer
= increment_reading_symtab ();
2899 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2900 process_cu_includes (dwarf2_per_objfile
);
2903 return per_cu
->v
.quick
->compunit_symtab
;
2906 /* See declaration. */
2908 dwarf2_per_cu_data
*
2909 dwarf2_per_objfile::get_cutu (int index
)
2911 if (index
>= this->all_comp_units
.size ())
2913 index
-= this->all_comp_units
.size ();
2914 gdb_assert (index
< this->all_type_units
.size ());
2915 return &this->all_type_units
[index
]->per_cu
;
2918 return this->all_comp_units
[index
];
2921 /* See declaration. */
2923 dwarf2_per_cu_data
*
2924 dwarf2_per_objfile::get_cu (int index
)
2926 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2928 return this->all_comp_units
[index
];
2931 /* See declaration. */
2934 dwarf2_per_objfile::get_tu (int index
)
2936 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2938 return this->all_type_units
[index
];
2941 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2942 objfile_obstack, and constructed with the specified field
2945 static dwarf2_per_cu_data
*
2946 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2947 struct dwarf2_section_info
*section
,
2949 sect_offset sect_off
, ULONGEST length
)
2951 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2952 dwarf2_per_cu_data
*the_cu
2953 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2954 struct dwarf2_per_cu_data
);
2955 the_cu
->sect_off
= sect_off
;
2956 the_cu
->length
= length
;
2957 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2958 the_cu
->section
= section
;
2959 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2960 struct dwarf2_per_cu_quick_data
);
2961 the_cu
->is_dwz
= is_dwz
;
2965 /* A helper for create_cus_from_index that handles a given list of
2969 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2970 const gdb_byte
*cu_list
, offset_type n_elements
,
2971 struct dwarf2_section_info
*section
,
2974 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2976 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2978 sect_offset sect_off
2979 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2980 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2983 dwarf2_per_cu_data
*per_cu
2984 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2986 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
2990 /* Read the CU list from the mapped index, and use it to create all
2991 the CU objects for this objfile. */
2994 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2995 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2996 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2998 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
2999 dwarf2_per_objfile
->all_comp_units
.reserve
3000 ((cu_list_elements
+ dwz_elements
) / 2);
3002 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3003 &dwarf2_per_objfile
->info
, 0);
3005 if (dwz_elements
== 0)
3008 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3009 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
3013 /* Create the signatured type hash table from the index. */
3016 create_signatured_type_table_from_index
3017 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3018 struct dwarf2_section_info
*section
,
3019 const gdb_byte
*bytes
,
3020 offset_type elements
)
3022 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3024 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3025 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
3027 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3029 for (offset_type i
= 0; i
< elements
; i
+= 3)
3031 struct signatured_type
*sig_type
;
3034 cu_offset type_offset_in_tu
;
3036 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3037 sect_offset sect_off
3038 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3040 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3042 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3045 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3046 struct signatured_type
);
3047 sig_type
->signature
= signature
;
3048 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3049 sig_type
->per_cu
.is_debug_types
= 1;
3050 sig_type
->per_cu
.section
= section
;
3051 sig_type
->per_cu
.sect_off
= sect_off
;
3052 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3053 sig_type
->per_cu
.v
.quick
3054 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3055 struct dwarf2_per_cu_quick_data
);
3057 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3060 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3063 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3066 /* Create the signatured type hash table from .debug_names. */
3069 create_signatured_type_table_from_debug_names
3070 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3071 const mapped_debug_names
&map
,
3072 struct dwarf2_section_info
*section
,
3073 struct dwarf2_section_info
*abbrev_section
)
3075 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3077 dwarf2_read_section (objfile
, section
);
3078 dwarf2_read_section (objfile
, abbrev_section
);
3080 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3081 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
3083 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3085 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3087 struct signatured_type
*sig_type
;
3090 sect_offset sect_off
3091 = (sect_offset
) (extract_unsigned_integer
3092 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3094 map
.dwarf5_byte_order
));
3096 comp_unit_head cu_header
;
3097 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3099 section
->buffer
+ to_underlying (sect_off
),
3102 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3103 struct signatured_type
);
3104 sig_type
->signature
= cu_header
.signature
;
3105 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3106 sig_type
->per_cu
.is_debug_types
= 1;
3107 sig_type
->per_cu
.section
= section
;
3108 sig_type
->per_cu
.sect_off
= sect_off
;
3109 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3110 sig_type
->per_cu
.v
.quick
3111 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3112 struct dwarf2_per_cu_quick_data
);
3114 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3117 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3120 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3123 /* Read the address map data from the mapped index, and use it to
3124 populate the objfile's psymtabs_addrmap. */
3127 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3128 struct mapped_index
*index
)
3130 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3131 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3132 const gdb_byte
*iter
, *end
;
3133 struct addrmap
*mutable_map
;
3136 auto_obstack temp_obstack
;
3138 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3140 iter
= index
->address_table
.data ();
3141 end
= iter
+ index
->address_table
.size ();
3143 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3147 ULONGEST hi
, lo
, cu_index
;
3148 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3150 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3152 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3157 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
3158 hex_string (lo
), hex_string (hi
));
3162 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
3164 complaint (_(".gdb_index address table has invalid CU number %u"),
3165 (unsigned) cu_index
);
3169 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
3170 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
3171 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3172 dwarf2_per_objfile
->get_cu (cu_index
));
3175 objfile
->partial_symtabs
->psymtabs_addrmap
3176 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3179 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3180 populate the objfile's psymtabs_addrmap. */
3183 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3184 struct dwarf2_section_info
*section
)
3186 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3187 bfd
*abfd
= objfile
->obfd
;
3188 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3189 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3190 SECT_OFF_TEXT (objfile
));
3192 auto_obstack temp_obstack
;
3193 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3195 std::unordered_map
<sect_offset
,
3196 dwarf2_per_cu_data
*,
3197 gdb::hash_enum
<sect_offset
>>
3198 debug_info_offset_to_per_cu
;
3199 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3201 const auto insertpair
3202 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3203 if (!insertpair
.second
)
3205 warning (_("Section .debug_aranges in %s has duplicate "
3206 "debug_info_offset %s, ignoring .debug_aranges."),
3207 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3212 dwarf2_read_section (objfile
, section
);
3214 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3216 const gdb_byte
*addr
= section
->buffer
;
3218 while (addr
< section
->buffer
+ section
->size
)
3220 const gdb_byte
*const entry_addr
= addr
;
3221 unsigned int bytes_read
;
3223 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3227 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3228 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3229 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3230 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3232 warning (_("Section .debug_aranges in %s entry at offset %s "
3233 "length %s exceeds section length %s, "
3234 "ignoring .debug_aranges."),
3235 objfile_name (objfile
),
3236 plongest (entry_addr
- section
->buffer
),
3237 plongest (bytes_read
+ entry_length
),
3238 pulongest (section
->size
));
3242 /* The version number. */
3243 const uint16_t version
= read_2_bytes (abfd
, addr
);
3247 warning (_("Section .debug_aranges in %s entry at offset %s "
3248 "has unsupported version %d, ignoring .debug_aranges."),
3249 objfile_name (objfile
),
3250 plongest (entry_addr
- section
->buffer
), version
);
3254 const uint64_t debug_info_offset
3255 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3256 addr
+= offset_size
;
3257 const auto per_cu_it
3258 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3259 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3261 warning (_("Section .debug_aranges in %s entry at offset %s "
3262 "debug_info_offset %s does not exists, "
3263 "ignoring .debug_aranges."),
3264 objfile_name (objfile
),
3265 plongest (entry_addr
- section
->buffer
),
3266 pulongest (debug_info_offset
));
3269 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3271 const uint8_t address_size
= *addr
++;
3272 if (address_size
< 1 || address_size
> 8)
3274 warning (_("Section .debug_aranges in %s entry at offset %s "
3275 "address_size %u is invalid, ignoring .debug_aranges."),
3276 objfile_name (objfile
),
3277 plongest (entry_addr
- section
->buffer
), address_size
);
3281 const uint8_t segment_selector_size
= *addr
++;
3282 if (segment_selector_size
!= 0)
3284 warning (_("Section .debug_aranges in %s entry at offset %s "
3285 "segment_selector_size %u is not supported, "
3286 "ignoring .debug_aranges."),
3287 objfile_name (objfile
),
3288 plongest (entry_addr
- section
->buffer
),
3289 segment_selector_size
);
3293 /* Must pad to an alignment boundary that is twice the address
3294 size. It is undocumented by the DWARF standard but GCC does
3296 for (size_t padding
= ((-(addr
- section
->buffer
))
3297 & (2 * address_size
- 1));
3298 padding
> 0; padding
--)
3301 warning (_("Section .debug_aranges in %s entry at offset %s "
3302 "padding is not zero, ignoring .debug_aranges."),
3303 objfile_name (objfile
),
3304 plongest (entry_addr
- section
->buffer
));
3310 if (addr
+ 2 * address_size
> entry_end
)
3312 warning (_("Section .debug_aranges in %s entry at offset %s "
3313 "address list is not properly terminated, "
3314 "ignoring .debug_aranges."),
3315 objfile_name (objfile
),
3316 plongest (entry_addr
- section
->buffer
));
3319 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3321 addr
+= address_size
;
3322 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3324 addr
+= address_size
;
3325 if (start
== 0 && length
== 0)
3327 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3329 /* Symbol was eliminated due to a COMDAT group. */
3332 ULONGEST end
= start
+ length
;
3333 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
3335 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
3337 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3341 objfile
->partial_symtabs
->psymtabs_addrmap
3342 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3345 /* Find a slot in the mapped index INDEX for the object named NAME.
3346 If NAME is found, set *VEC_OUT to point to the CU vector in the
3347 constant pool and return true. If NAME cannot be found, return
3351 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3352 offset_type
**vec_out
)
3355 offset_type slot
, step
;
3356 int (*cmp
) (const char *, const char *);
3358 gdb::unique_xmalloc_ptr
<char> without_params
;
3359 if (current_language
->la_language
== language_cplus
3360 || current_language
->la_language
== language_fortran
3361 || current_language
->la_language
== language_d
)
3363 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3366 if (strchr (name
, '(') != NULL
)
3368 without_params
= cp_remove_params (name
);
3370 if (without_params
!= NULL
)
3371 name
= without_params
.get ();
3375 /* Index version 4 did not support case insensitive searches. But the
3376 indices for case insensitive languages are built in lowercase, therefore
3377 simulate our NAME being searched is also lowercased. */
3378 hash
= mapped_index_string_hash ((index
->version
== 4
3379 && case_sensitivity
== case_sensitive_off
3380 ? 5 : index
->version
),
3383 slot
= hash
& (index
->symbol_table
.size () - 1);
3384 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3385 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3391 const auto &bucket
= index
->symbol_table
[slot
];
3392 if (bucket
.name
== 0 && bucket
.vec
== 0)
3395 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3396 if (!cmp (name
, str
))
3398 *vec_out
= (offset_type
*) (index
->constant_pool
3399 + MAYBE_SWAP (bucket
.vec
));
3403 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3407 /* A helper function that reads the .gdb_index from BUFFER and fills
3408 in MAP. FILENAME is the name of the file containing the data;
3409 it is used for error reporting. DEPRECATED_OK is true if it is
3410 ok to use deprecated sections.
3412 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3413 out parameters that are filled in with information about the CU and
3414 TU lists in the section.
3416 Returns true if all went well, false otherwise. */
3419 read_gdb_index_from_buffer (struct objfile
*objfile
,
3420 const char *filename
,
3422 gdb::array_view
<const gdb_byte
> buffer
,
3423 struct mapped_index
*map
,
3424 const gdb_byte
**cu_list
,
3425 offset_type
*cu_list_elements
,
3426 const gdb_byte
**types_list
,
3427 offset_type
*types_list_elements
)
3429 const gdb_byte
*addr
= &buffer
[0];
3431 /* Version check. */
3432 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
3433 /* Versions earlier than 3 emitted every copy of a psymbol. This
3434 causes the index to behave very poorly for certain requests. Version 3
3435 contained incomplete addrmap. So, it seems better to just ignore such
3439 static int warning_printed
= 0;
3440 if (!warning_printed
)
3442 warning (_("Skipping obsolete .gdb_index section in %s."),
3444 warning_printed
= 1;
3448 /* Index version 4 uses a different hash function than index version
3451 Versions earlier than 6 did not emit psymbols for inlined
3452 functions. Using these files will cause GDB not to be able to
3453 set breakpoints on inlined functions by name, so we ignore these
3454 indices unless the user has done
3455 "set use-deprecated-index-sections on". */
3456 if (version
< 6 && !deprecated_ok
)
3458 static int warning_printed
= 0;
3459 if (!warning_printed
)
3462 Skipping deprecated .gdb_index section in %s.\n\
3463 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3464 to use the section anyway."),
3466 warning_printed
= 1;
3470 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3471 of the TU (for symbols coming from TUs),
3472 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3473 Plus gold-generated indices can have duplicate entries for global symbols,
3474 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3475 These are just performance bugs, and we can't distinguish gdb-generated
3476 indices from gold-generated ones, so issue no warning here. */
3478 /* Indexes with higher version than the one supported by GDB may be no
3479 longer backward compatible. */
3483 map
->version
= version
;
3485 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3488 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3489 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3493 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3494 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3495 - MAYBE_SWAP (metadata
[i
]))
3499 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3500 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3502 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3505 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3506 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3508 = gdb::array_view
<mapped_index::symbol_table_slot
>
3509 ((mapped_index::symbol_table_slot
*) symbol_table
,
3510 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3513 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3518 /* Callback types for dwarf2_read_gdb_index. */
3520 typedef gdb::function_view
3521 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
3522 get_gdb_index_contents_ftype
;
3523 typedef gdb::function_view
3524 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3525 get_gdb_index_contents_dwz_ftype
;
3527 /* Read .gdb_index. If everything went ok, initialize the "quick"
3528 elements of all the CUs and return 1. Otherwise, return 0. */
3531 dwarf2_read_gdb_index
3532 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3533 get_gdb_index_contents_ftype get_gdb_index_contents
,
3534 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3536 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3537 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3538 struct dwz_file
*dwz
;
3539 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3541 gdb::array_view
<const gdb_byte
> main_index_contents
3542 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3544 if (main_index_contents
.empty ())
3547 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3548 if (!read_gdb_index_from_buffer (objfile
, objfile_name (objfile
),
3549 use_deprecated_index_sections
,
3550 main_index_contents
, map
.get (), &cu_list
,
3551 &cu_list_elements
, &types_list
,
3552 &types_list_elements
))
3555 /* Don't use the index if it's empty. */
3556 if (map
->symbol_table
.empty ())
3559 /* If there is a .dwz file, read it so we can get its CU list as
3561 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3564 struct mapped_index dwz_map
;
3565 const gdb_byte
*dwz_types_ignore
;
3566 offset_type dwz_types_elements_ignore
;
3568 gdb::array_view
<const gdb_byte
> dwz_index_content
3569 = get_gdb_index_contents_dwz (objfile
, dwz
);
3571 if (dwz_index_content
.empty ())
3574 if (!read_gdb_index_from_buffer (objfile
,
3575 bfd_get_filename (dwz
->dwz_bfd
), 1,
3576 dwz_index_content
, &dwz_map
,
3577 &dwz_list
, &dwz_list_elements
,
3579 &dwz_types_elements_ignore
))
3581 warning (_("could not read '.gdb_index' section from %s; skipping"),
3582 bfd_get_filename (dwz
->dwz_bfd
));
3587 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3588 dwz_list
, dwz_list_elements
);
3590 if (types_list_elements
)
3592 /* We can only handle a single .debug_types when we have an
3594 if (dwarf2_per_objfile
->types
.size () != 1)
3597 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
3599 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3600 types_list
, types_list_elements
);
3603 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3605 dwarf2_per_objfile
->index_table
= std::move (map
);
3606 dwarf2_per_objfile
->using_index
= 1;
3607 dwarf2_per_objfile
->quick_file_names_table
=
3608 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3613 /* die_reader_func for dw2_get_file_names. */
3616 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3617 const gdb_byte
*info_ptr
,
3618 struct die_info
*comp_unit_die
,
3622 struct dwarf2_cu
*cu
= reader
->cu
;
3623 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3624 struct dwarf2_per_objfile
*dwarf2_per_objfile
3625 = cu
->per_cu
->dwarf2_per_objfile
;
3626 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3627 struct dwarf2_per_cu_data
*lh_cu
;
3628 struct attribute
*attr
;
3631 struct quick_file_names
*qfn
;
3633 gdb_assert (! this_cu
->is_debug_types
);
3635 /* Our callers never want to match partial units -- instead they
3636 will match the enclosing full CU. */
3637 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3639 this_cu
->v
.quick
->no_file_data
= 1;
3647 sect_offset line_offset
{};
3649 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3652 struct quick_file_names find_entry
;
3654 line_offset
= (sect_offset
) DW_UNSND (attr
);
3656 /* We may have already read in this line header (TU line header sharing).
3657 If we have we're done. */
3658 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3659 find_entry
.hash
.line_sect_off
= line_offset
;
3660 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3661 &find_entry
, INSERT
);
3664 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3668 lh
= dwarf_decode_line_header (line_offset
, cu
);
3672 lh_cu
->v
.quick
->no_file_data
= 1;
3676 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3677 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3678 qfn
->hash
.line_sect_off
= line_offset
;
3679 gdb_assert (slot
!= NULL
);
3682 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3684 qfn
->num_file_names
= lh
->file_names
.size ();
3686 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3687 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3688 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3689 qfn
->real_names
= NULL
;
3691 lh_cu
->v
.quick
->file_names
= qfn
;
3694 /* A helper for the "quick" functions which attempts to read the line
3695 table for THIS_CU. */
3697 static struct quick_file_names
*
3698 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3700 /* This should never be called for TUs. */
3701 gdb_assert (! this_cu
->is_debug_types
);
3702 /* Nor type unit groups. */
3703 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3705 if (this_cu
->v
.quick
->file_names
!= NULL
)
3706 return this_cu
->v
.quick
->file_names
;
3707 /* If we know there is no line data, no point in looking again. */
3708 if (this_cu
->v
.quick
->no_file_data
)
3711 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3713 if (this_cu
->v
.quick
->no_file_data
)
3715 return this_cu
->v
.quick
->file_names
;
3718 /* A helper for the "quick" functions which computes and caches the
3719 real path for a given file name from the line table. */
3722 dw2_get_real_path (struct objfile
*objfile
,
3723 struct quick_file_names
*qfn
, int index
)
3725 if (qfn
->real_names
== NULL
)
3726 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3727 qfn
->num_file_names
, const char *);
3729 if (qfn
->real_names
[index
] == NULL
)
3730 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3732 return qfn
->real_names
[index
];
3735 static struct symtab
*
3736 dw2_find_last_source_symtab (struct objfile
*objfile
)
3738 struct dwarf2_per_objfile
*dwarf2_per_objfile
3739 = get_dwarf2_per_objfile (objfile
);
3740 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3741 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3746 return compunit_primary_filetab (cust
);
3749 /* Traversal function for dw2_forget_cached_source_info. */
3752 dw2_free_cached_file_names (void **slot
, void *info
)
3754 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3756 if (file_data
->real_names
)
3760 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3762 xfree ((void*) file_data
->real_names
[i
]);
3763 file_data
->real_names
[i
] = NULL
;
3771 dw2_forget_cached_source_info (struct objfile
*objfile
)
3773 struct dwarf2_per_objfile
*dwarf2_per_objfile
3774 = get_dwarf2_per_objfile (objfile
);
3776 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3777 dw2_free_cached_file_names
, NULL
);
3780 /* Helper function for dw2_map_symtabs_matching_filename that expands
3781 the symtabs and calls the iterator. */
3784 dw2_map_expand_apply (struct objfile
*objfile
,
3785 struct dwarf2_per_cu_data
*per_cu
,
3786 const char *name
, const char *real_path
,
3787 gdb::function_view
<bool (symtab
*)> callback
)
3789 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3791 /* Don't visit already-expanded CUs. */
3792 if (per_cu
->v
.quick
->compunit_symtab
)
3795 /* This may expand more than one symtab, and we want to iterate over
3797 dw2_instantiate_symtab (per_cu
, false);
3799 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3800 last_made
, callback
);
3803 /* Implementation of the map_symtabs_matching_filename method. */
3806 dw2_map_symtabs_matching_filename
3807 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3808 gdb::function_view
<bool (symtab
*)> callback
)
3810 const char *name_basename
= lbasename (name
);
3811 struct dwarf2_per_objfile
*dwarf2_per_objfile
3812 = get_dwarf2_per_objfile (objfile
);
3814 /* The rule is CUs specify all the files, including those used by
3815 any TU, so there's no need to scan TUs here. */
3817 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3819 /* We only need to look at symtabs not already expanded. */
3820 if (per_cu
->v
.quick
->compunit_symtab
)
3823 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3824 if (file_data
== NULL
)
3827 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3829 const char *this_name
= file_data
->file_names
[j
];
3830 const char *this_real_name
;
3832 if (compare_filenames_for_search (this_name
, name
))
3834 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3840 /* Before we invoke realpath, which can get expensive when many
3841 files are involved, do a quick comparison of the basenames. */
3842 if (! basenames_may_differ
3843 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3846 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3847 if (compare_filenames_for_search (this_real_name
, name
))
3849 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3855 if (real_path
!= NULL
)
3857 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3858 gdb_assert (IS_ABSOLUTE_PATH (name
));
3859 if (this_real_name
!= NULL
3860 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3862 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3874 /* Struct used to manage iterating over all CUs looking for a symbol. */
3876 struct dw2_symtab_iterator
3878 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3879 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3880 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3881 int want_specific_block
;
3882 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3883 Unused if !WANT_SPECIFIC_BLOCK. */
3885 /* The kind of symbol we're looking for. */
3887 /* The list of CUs from the index entry of the symbol,
3888 or NULL if not found. */
3890 /* The next element in VEC to look at. */
3892 /* The number of elements in VEC, or zero if there is no match. */
3894 /* Have we seen a global version of the symbol?
3895 If so we can ignore all further global instances.
3896 This is to work around gold/15646, inefficient gold-generated
3901 /* Initialize the index symtab iterator ITER.
3902 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3903 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3906 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3907 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3908 int want_specific_block
,
3913 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3914 iter
->want_specific_block
= want_specific_block
;
3915 iter
->block_index
= block_index
;
3916 iter
->domain
= domain
;
3918 iter
->global_seen
= 0;
3920 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3922 /* index is NULL if OBJF_READNOW. */
3923 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3924 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3932 /* Return the next matching CU or NULL if there are no more. */
3934 static struct dwarf2_per_cu_data
*
3935 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3937 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3939 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3941 offset_type cu_index_and_attrs
=
3942 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3943 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3944 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3945 /* This value is only valid for index versions >= 7. */
3946 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3947 gdb_index_symbol_kind symbol_kind
=
3948 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3949 /* Only check the symbol attributes if they're present.
3950 Indices prior to version 7 don't record them,
3951 and indices >= 7 may elide them for certain symbols
3952 (gold does this). */
3954 (dwarf2_per_objfile
->index_table
->version
>= 7
3955 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3957 /* Don't crash on bad data. */
3958 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3959 + dwarf2_per_objfile
->all_type_units
.size ()))
3961 complaint (_(".gdb_index entry has bad CU index"
3963 objfile_name (dwarf2_per_objfile
->objfile
));
3967 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3969 /* Skip if already read in. */
3970 if (per_cu
->v
.quick
->compunit_symtab
)
3973 /* Check static vs global. */
3976 if (iter
->want_specific_block
3977 && want_static
!= is_static
)
3979 /* Work around gold/15646. */
3980 if (!is_static
&& iter
->global_seen
)
3983 iter
->global_seen
= 1;
3986 /* Only check the symbol's kind if it has one. */
3989 switch (iter
->domain
)
3992 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3993 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3994 /* Some types are also in VAR_DOMAIN. */
3995 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3999 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4003 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4018 static struct compunit_symtab
*
4019 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
4020 const char *name
, domain_enum domain
)
4022 struct compunit_symtab
*stab_best
= NULL
;
4023 struct dwarf2_per_objfile
*dwarf2_per_objfile
4024 = get_dwarf2_per_objfile (objfile
);
4026 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4028 struct dw2_symtab_iterator iter
;
4029 struct dwarf2_per_cu_data
*per_cu
;
4031 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 1, block_index
, domain
, name
);
4033 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4035 struct symbol
*sym
, *with_opaque
= NULL
;
4036 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
4037 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4038 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4040 sym
= block_find_symbol (block
, name
, domain
,
4041 block_find_non_opaque_type_preferred
,
4044 /* Some caution must be observed with overloaded functions
4045 and methods, since the index will not contain any overload
4046 information (but NAME might contain it). */
4049 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4051 if (with_opaque
!= NULL
4052 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4055 /* Keep looking through other CUs. */
4062 dw2_print_stats (struct objfile
*objfile
)
4064 struct dwarf2_per_objfile
*dwarf2_per_objfile
4065 = get_dwarf2_per_objfile (objfile
);
4066 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
4067 + dwarf2_per_objfile
->all_type_units
.size ());
4070 for (int i
= 0; i
< total
; ++i
)
4072 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4074 if (!per_cu
->v
.quick
->compunit_symtab
)
4077 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4078 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4081 /* This dumps minimal information about the index.
4082 It is called via "mt print objfiles".
4083 One use is to verify .gdb_index has been loaded by the
4084 gdb.dwarf2/gdb-index.exp testcase. */
4087 dw2_dump (struct objfile
*objfile
)
4089 struct dwarf2_per_objfile
*dwarf2_per_objfile
4090 = get_dwarf2_per_objfile (objfile
);
4092 gdb_assert (dwarf2_per_objfile
->using_index
);
4093 printf_filtered (".gdb_index:");
4094 if (dwarf2_per_objfile
->index_table
!= NULL
)
4096 printf_filtered (" version %d\n",
4097 dwarf2_per_objfile
->index_table
->version
);
4100 printf_filtered (" faked for \"readnow\"\n");
4101 printf_filtered ("\n");
4105 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4106 const char *func_name
)
4108 struct dwarf2_per_objfile
*dwarf2_per_objfile
4109 = get_dwarf2_per_objfile (objfile
);
4111 struct dw2_symtab_iterator iter
;
4112 struct dwarf2_per_cu_data
*per_cu
;
4114 /* Note: It doesn't matter what we pass for block_index here. */
4115 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
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 /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block
5661 BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
5662 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5663 bool want_specific_block
,
5664 block_enum block_index
, domain_enum domain
,
5666 : m_map (map
), m_want_specific_block (want_specific_block
),
5667 m_block_index (block_index
), m_domain (domain
),
5668 m_addr (find_vec_in_debug_names (map
, name
))
5671 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5672 search_domain search
, uint32_t namei
)
5675 m_addr (find_vec_in_debug_names (map
, namei
))
5678 /* Return the next matching CU or NULL if there are no more. */
5679 dwarf2_per_cu_data
*next ();
5682 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5684 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5687 /* The internalized form of .debug_names. */
5688 const mapped_debug_names
&m_map
;
5690 /* If true, only look for symbols that match BLOCK_INDEX. */
5691 const bool m_want_specific_block
= false;
5693 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
5694 Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid
5696 const block_enum m_block_index
= FIRST_LOCAL_BLOCK
;
5698 /* The kind of symbol we're looking for. */
5699 const domain_enum m_domain
= UNDEF_DOMAIN
;
5700 const search_domain m_search
= ALL_DOMAIN
;
5702 /* The list of CUs from the index entry of the symbol, or NULL if
5704 const gdb_byte
*m_addr
;
5708 mapped_debug_names::namei_to_name (uint32_t namei
) const
5710 const ULONGEST namei_string_offs
5711 = extract_unsigned_integer ((name_table_string_offs_reordered
5712 + namei
* offset_size
),
5715 return read_indirect_string_at_offset
5716 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5719 /* Find a slot in .debug_names for the object named NAME. If NAME is
5720 found, return pointer to its pool data. If NAME cannot be found,
5724 dw2_debug_names_iterator::find_vec_in_debug_names
5725 (const mapped_debug_names
&map
, const char *name
)
5727 int (*cmp
) (const char *, const char *);
5729 if (current_language
->la_language
== language_cplus
5730 || current_language
->la_language
== language_fortran
5731 || current_language
->la_language
== language_d
)
5733 /* NAME is already canonical. Drop any qualifiers as
5734 .debug_names does not contain any. */
5736 if (strchr (name
, '(') != NULL
)
5738 gdb::unique_xmalloc_ptr
<char> without_params
5739 = cp_remove_params (name
);
5741 if (without_params
!= NULL
)
5743 name
= without_params
.get();
5748 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5750 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5752 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5753 (map
.bucket_table_reordered
5754 + (full_hash
% map
.bucket_count
)), 4,
5755 map
.dwarf5_byte_order
);
5759 if (namei
>= map
.name_count
)
5761 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5763 namei
, map
.name_count
,
5764 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5770 const uint32_t namei_full_hash
5771 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5772 (map
.hash_table_reordered
+ namei
), 4,
5773 map
.dwarf5_byte_order
);
5774 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5777 if (full_hash
== namei_full_hash
)
5779 const char *const namei_string
= map
.namei_to_name (namei
);
5781 #if 0 /* An expensive sanity check. */
5782 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5784 complaint (_("Wrong .debug_names hash for string at index %u "
5786 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5791 if (cmp (namei_string
, name
) == 0)
5793 const ULONGEST namei_entry_offs
5794 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5795 + namei
* map
.offset_size
),
5796 map
.offset_size
, map
.dwarf5_byte_order
);
5797 return map
.entry_pool
+ namei_entry_offs
;
5802 if (namei
>= map
.name_count
)
5808 dw2_debug_names_iterator::find_vec_in_debug_names
5809 (const mapped_debug_names
&map
, uint32_t namei
)
5811 if (namei
>= map
.name_count
)
5813 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5815 namei
, map
.name_count
,
5816 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5820 const ULONGEST namei_entry_offs
5821 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5822 + namei
* map
.offset_size
),
5823 map
.offset_size
, map
.dwarf5_byte_order
);
5824 return map
.entry_pool
+ namei_entry_offs
;
5827 /* See dw2_debug_names_iterator. */
5829 dwarf2_per_cu_data
*
5830 dw2_debug_names_iterator::next ()
5835 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5836 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5837 bfd
*const abfd
= objfile
->obfd
;
5841 unsigned int bytes_read
;
5842 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5843 m_addr
+= bytes_read
;
5847 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5848 if (indexval_it
== m_map
.abbrev_map
.cend ())
5850 complaint (_("Wrong .debug_names undefined abbrev code %s "
5852 pulongest (abbrev
), objfile_name (objfile
));
5855 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5856 bool have_is_static
= false;
5858 dwarf2_per_cu_data
*per_cu
= NULL
;
5859 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5864 case DW_FORM_implicit_const
:
5865 ull
= attr
.implicit_const
;
5867 case DW_FORM_flag_present
:
5871 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5872 m_addr
+= bytes_read
;
5875 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5876 dwarf_form_name (attr
.form
),
5877 objfile_name (objfile
));
5880 switch (attr
.dw_idx
)
5882 case DW_IDX_compile_unit
:
5883 /* Don't crash on bad data. */
5884 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5886 complaint (_(".debug_names entry has bad CU index %s"
5889 objfile_name (dwarf2_per_objfile
->objfile
));
5892 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5894 case DW_IDX_type_unit
:
5895 /* Don't crash on bad data. */
5896 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5898 complaint (_(".debug_names entry has bad TU index %s"
5901 objfile_name (dwarf2_per_objfile
->objfile
));
5904 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5906 case DW_IDX_GNU_internal
:
5907 if (!m_map
.augmentation_is_gdb
)
5909 have_is_static
= true;
5912 case DW_IDX_GNU_external
:
5913 if (!m_map
.augmentation_is_gdb
)
5915 have_is_static
= true;
5921 /* Skip if already read in. */
5922 if (per_cu
->v
.quick
->compunit_symtab
)
5925 /* Check static vs global. */
5928 const bool want_static
= m_block_index
!= GLOBAL_BLOCK
;
5929 if (m_want_specific_block
&& want_static
!= is_static
)
5933 /* Match dw2_symtab_iter_next, symbol_kind
5934 and debug_names::psymbol_tag. */
5938 switch (indexval
.dwarf_tag
)
5940 case DW_TAG_variable
:
5941 case DW_TAG_subprogram
:
5942 /* Some types are also in VAR_DOMAIN. */
5943 case DW_TAG_typedef
:
5944 case DW_TAG_structure_type
:
5951 switch (indexval
.dwarf_tag
)
5953 case DW_TAG_typedef
:
5954 case DW_TAG_structure_type
:
5961 switch (indexval
.dwarf_tag
)
5964 case DW_TAG_variable
:
5974 /* Match dw2_expand_symtabs_matching, symbol_kind and
5975 debug_names::psymbol_tag. */
5978 case VARIABLES_DOMAIN
:
5979 switch (indexval
.dwarf_tag
)
5981 case DW_TAG_variable
:
5987 case FUNCTIONS_DOMAIN
:
5988 switch (indexval
.dwarf_tag
)
5990 case DW_TAG_subprogram
:
5997 switch (indexval
.dwarf_tag
)
5999 case DW_TAG_typedef
:
6000 case DW_TAG_structure_type
:
6013 static struct compunit_symtab
*
6014 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, int block_index_int
,
6015 const char *name
, domain_enum domain
)
6017 const block_enum block_index
= static_cast<block_enum
> (block_index_int
);
6018 struct dwarf2_per_objfile
*dwarf2_per_objfile
6019 = get_dwarf2_per_objfile (objfile
);
6021 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6024 /* index is NULL if OBJF_READNOW. */
6027 const auto &map
= *mapp
;
6029 dw2_debug_names_iterator
iter (map
, true /* want_specific_block */,
6030 block_index
, domain
, name
);
6032 struct compunit_symtab
*stab_best
= NULL
;
6033 struct dwarf2_per_cu_data
*per_cu
;
6034 while ((per_cu
= iter
.next ()) != NULL
)
6036 struct symbol
*sym
, *with_opaque
= NULL
;
6037 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
6038 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6039 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6041 sym
= block_find_symbol (block
, name
, domain
,
6042 block_find_non_opaque_type_preferred
,
6045 /* Some caution must be observed with overloaded functions and
6046 methods, since the index will not contain any overload
6047 information (but NAME might contain it). */
6050 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6052 if (with_opaque
!= NULL
6053 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6056 /* Keep looking through other CUs. */
6062 /* This dumps minimal information about .debug_names. It is called
6063 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6064 uses this to verify that .debug_names has been loaded. */
6067 dw2_debug_names_dump (struct objfile
*objfile
)
6069 struct dwarf2_per_objfile
*dwarf2_per_objfile
6070 = get_dwarf2_per_objfile (objfile
);
6072 gdb_assert (dwarf2_per_objfile
->using_index
);
6073 printf_filtered (".debug_names:");
6074 if (dwarf2_per_objfile
->debug_names_table
)
6075 printf_filtered (" exists\n");
6077 printf_filtered (" faked for \"readnow\"\n");
6078 printf_filtered ("\n");
6082 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6083 const char *func_name
)
6085 struct dwarf2_per_objfile
*dwarf2_per_objfile
6086 = get_dwarf2_per_objfile (objfile
);
6088 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6089 if (dwarf2_per_objfile
->debug_names_table
)
6091 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6093 /* Note: It doesn't matter what we pass for block_index here. */
6094 dw2_debug_names_iterator
iter (map
, false /* want_specific_block */,
6095 GLOBAL_BLOCK
, VAR_DOMAIN
, func_name
);
6097 struct dwarf2_per_cu_data
*per_cu
;
6098 while ((per_cu
= iter
.next ()) != NULL
)
6099 dw2_instantiate_symtab (per_cu
, false);
6104 dw2_debug_names_expand_symtabs_matching
6105 (struct objfile
*objfile
,
6106 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6107 const lookup_name_info
&lookup_name
,
6108 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6109 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6110 enum search_domain kind
)
6112 struct dwarf2_per_objfile
*dwarf2_per_objfile
6113 = get_dwarf2_per_objfile (objfile
);
6115 /* debug_names_table is NULL if OBJF_READNOW. */
6116 if (!dwarf2_per_objfile
->debug_names_table
)
6119 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6121 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6123 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6125 kind
, [&] (offset_type namei
)
6127 /* The name was matched, now expand corresponding CUs that were
6129 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6131 struct dwarf2_per_cu_data
*per_cu
;
6132 while ((per_cu
= iter
.next ()) != NULL
)
6133 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6138 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6141 dw2_find_last_source_symtab
,
6142 dw2_forget_cached_source_info
,
6143 dw2_map_symtabs_matching_filename
,
6144 dw2_debug_names_lookup_symbol
,
6146 dw2_debug_names_dump
,
6147 dw2_debug_names_expand_symtabs_for_function
,
6148 dw2_expand_all_symtabs
,
6149 dw2_expand_symtabs_with_fullname
,
6150 dw2_map_matching_symbols
,
6151 dw2_debug_names_expand_symtabs_matching
,
6152 dw2_find_pc_sect_compunit_symtab
,
6154 dw2_map_symbol_filenames
6157 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
6158 to either a dwarf2_per_objfile or dwz_file object. */
6160 template <typename T
>
6161 static gdb::array_view
<const gdb_byte
>
6162 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
6164 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
6166 if (dwarf2_section_empty_p (section
))
6169 /* Older elfutils strip versions could keep the section in the main
6170 executable while splitting it for the separate debug info file. */
6171 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
6174 dwarf2_read_section (obj
, section
);
6176 /* dwarf2_section_info::size is a bfd_size_type, while
6177 gdb::array_view works with size_t. On 32-bit hosts, with
6178 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
6179 is 32-bit. So we need an explicit narrowing conversion here.
6180 This is fine, because it's impossible to allocate or mmap an
6181 array/buffer larger than what size_t can represent. */
6182 return gdb::make_array_view (section
->buffer
, section
->size
);
6185 /* Lookup the index cache for the contents of the index associated to
6188 static gdb::array_view
<const gdb_byte
>
6189 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
6191 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
6192 if (build_id
== nullptr)
6195 return global_index_cache
.lookup_gdb_index (build_id
,
6196 &dwarf2_obj
->index_cache_res
);
6199 /* Same as the above, but for DWZ. */
6201 static gdb::array_view
<const gdb_byte
>
6202 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
6204 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
6205 if (build_id
== nullptr)
6208 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
6211 /* See symfile.h. */
6214 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6216 struct dwarf2_per_objfile
*dwarf2_per_objfile
6217 = get_dwarf2_per_objfile (objfile
);
6219 /* If we're about to read full symbols, don't bother with the
6220 indices. In this case we also don't care if some other debug
6221 format is making psymtabs, because they are all about to be
6223 if ((objfile
->flags
& OBJF_READNOW
))
6225 dwarf2_per_objfile
->using_index
= 1;
6226 create_all_comp_units (dwarf2_per_objfile
);
6227 create_all_type_units (dwarf2_per_objfile
);
6228 dwarf2_per_objfile
->quick_file_names_table
6229 = create_quick_file_names_table
6230 (dwarf2_per_objfile
->all_comp_units
.size ());
6232 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
6233 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
6235 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6237 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6238 struct dwarf2_per_cu_quick_data
);
6241 /* Return 1 so that gdb sees the "quick" functions. However,
6242 these functions will be no-ops because we will have expanded
6244 *index_kind
= dw_index_kind::GDB_INDEX
;
6248 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6250 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6254 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6255 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
6256 get_gdb_index_contents_from_section
<dwz_file
>))
6258 *index_kind
= dw_index_kind::GDB_INDEX
;
6262 /* ... otherwise, try to find the index in the index cache. */
6263 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6264 get_gdb_index_contents_from_cache
,
6265 get_gdb_index_contents_from_cache_dwz
))
6267 global_index_cache
.hit ();
6268 *index_kind
= dw_index_kind::GDB_INDEX
;
6272 global_index_cache
.miss ();
6278 /* Build a partial symbol table. */
6281 dwarf2_build_psymtabs (struct objfile
*objfile
)
6283 struct dwarf2_per_objfile
*dwarf2_per_objfile
6284 = get_dwarf2_per_objfile (objfile
);
6286 init_psymbol_list (objfile
, 1024);
6290 /* This isn't really ideal: all the data we allocate on the
6291 objfile's obstack is still uselessly kept around. However,
6292 freeing it seems unsafe. */
6293 psymtab_discarder
psymtabs (objfile
);
6294 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6297 /* (maybe) store an index in the cache. */
6298 global_index_cache
.store (dwarf2_per_objfile
);
6300 catch (const gdb_exception_error
&except
)
6302 exception_print (gdb_stderr
, except
);
6306 /* Return the total length of the CU described by HEADER. */
6309 get_cu_length (const struct comp_unit_head
*header
)
6311 return header
->initial_length_size
+ header
->length
;
6314 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6317 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6319 sect_offset bottom
= cu_header
->sect_off
;
6320 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6322 return sect_off
>= bottom
&& sect_off
< top
;
6325 /* Find the base address of the compilation unit for range lists and
6326 location lists. It will normally be specified by DW_AT_low_pc.
6327 In DWARF-3 draft 4, the base address could be overridden by
6328 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6329 compilation units with discontinuous ranges. */
6332 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6334 struct attribute
*attr
;
6337 cu
->base_address
= 0;
6339 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6342 cu
->base_address
= attr_value_as_address (attr
);
6347 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6350 cu
->base_address
= attr_value_as_address (attr
);
6356 /* Read in the comp unit header information from the debug_info at info_ptr.
6357 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6358 NOTE: This leaves members offset, first_die_offset to be filled in
6361 static const gdb_byte
*
6362 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6363 const gdb_byte
*info_ptr
,
6364 struct dwarf2_section_info
*section
,
6365 rcuh_kind section_kind
)
6368 unsigned int bytes_read
;
6369 const char *filename
= get_section_file_name (section
);
6370 bfd
*abfd
= get_section_bfd_owner (section
);
6372 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6373 cu_header
->initial_length_size
= bytes_read
;
6374 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6375 info_ptr
+= bytes_read
;
6376 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6377 if (cu_header
->version
< 2 || cu_header
->version
> 5)
6378 error (_("Dwarf Error: wrong version in compilation unit header "
6379 "(is %d, should be 2, 3, 4 or 5) [in module %s]"),
6380 cu_header
->version
, filename
);
6382 if (cu_header
->version
< 5)
6383 switch (section_kind
)
6385 case rcuh_kind::COMPILE
:
6386 cu_header
->unit_type
= DW_UT_compile
;
6388 case rcuh_kind::TYPE
:
6389 cu_header
->unit_type
= DW_UT_type
;
6392 internal_error (__FILE__
, __LINE__
,
6393 _("read_comp_unit_head: invalid section_kind"));
6397 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6398 (read_1_byte (abfd
, info_ptr
));
6400 switch (cu_header
->unit_type
)
6403 if (section_kind
!= rcuh_kind::COMPILE
)
6404 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6405 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
6409 section_kind
= rcuh_kind::TYPE
;
6412 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6413 "(is %d, should be %d or %d) [in module %s]"),
6414 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
6417 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6420 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6423 info_ptr
+= bytes_read
;
6424 if (cu_header
->version
< 5)
6426 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6429 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6430 if (signed_addr
< 0)
6431 internal_error (__FILE__
, __LINE__
,
6432 _("read_comp_unit_head: dwarf from non elf file"));
6433 cu_header
->signed_addr_p
= signed_addr
;
6435 if (section_kind
== rcuh_kind::TYPE
)
6437 LONGEST type_offset
;
6439 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6442 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6443 info_ptr
+= bytes_read
;
6444 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6445 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6446 error (_("Dwarf Error: Too big type_offset in compilation unit "
6447 "header (is %s) [in module %s]"), plongest (type_offset
),
6454 /* Helper function that returns the proper abbrev section for
6457 static struct dwarf2_section_info
*
6458 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6460 struct dwarf2_section_info
*abbrev
;
6461 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6463 if (this_cu
->is_dwz
)
6464 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6466 abbrev
= &dwarf2_per_objfile
->abbrev
;
6471 /* Subroutine of read_and_check_comp_unit_head and
6472 read_and_check_type_unit_head to simplify them.
6473 Perform various error checking on the header. */
6476 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6477 struct comp_unit_head
*header
,
6478 struct dwarf2_section_info
*section
,
6479 struct dwarf2_section_info
*abbrev_section
)
6481 const char *filename
= get_section_file_name (section
);
6483 if (to_underlying (header
->abbrev_sect_off
)
6484 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6485 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6486 "(offset %s + 6) [in module %s]"),
6487 sect_offset_str (header
->abbrev_sect_off
),
6488 sect_offset_str (header
->sect_off
),
6491 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6492 avoid potential 32-bit overflow. */
6493 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6495 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6496 "(offset %s + 0) [in module %s]"),
6497 header
->length
, sect_offset_str (header
->sect_off
),
6501 /* Read in a CU/TU header and perform some basic error checking.
6502 The contents of the header are stored in HEADER.
6503 The result is a pointer to the start of the first DIE. */
6505 static const gdb_byte
*
6506 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6507 struct comp_unit_head
*header
,
6508 struct dwarf2_section_info
*section
,
6509 struct dwarf2_section_info
*abbrev_section
,
6510 const gdb_byte
*info_ptr
,
6511 rcuh_kind section_kind
)
6513 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6515 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6517 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6519 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6521 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6527 /* Fetch the abbreviation table offset from a comp or type unit header. */
6530 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6531 struct dwarf2_section_info
*section
,
6532 sect_offset sect_off
)
6534 bfd
*abfd
= get_section_bfd_owner (section
);
6535 const gdb_byte
*info_ptr
;
6536 unsigned int initial_length_size
, offset_size
;
6539 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6540 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6541 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6542 offset_size
= initial_length_size
== 4 ? 4 : 8;
6543 info_ptr
+= initial_length_size
;
6545 version
= read_2_bytes (abfd
, info_ptr
);
6549 /* Skip unit type and address size. */
6553 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6556 /* Allocate a new partial symtab for file named NAME and mark this new
6557 partial symtab as being an include of PST. */
6560 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6561 struct objfile
*objfile
)
6563 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6565 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6567 /* It shares objfile->objfile_obstack. */
6568 subpst
->dirname
= pst
->dirname
;
6571 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6572 subpst
->dependencies
[0] = pst
;
6573 subpst
->number_of_dependencies
= 1;
6575 subpst
->read_symtab
= pst
->read_symtab
;
6577 /* No private part is necessary for include psymtabs. This property
6578 can be used to differentiate between such include psymtabs and
6579 the regular ones. */
6580 subpst
->read_symtab_private
= NULL
;
6583 /* Read the Line Number Program data and extract the list of files
6584 included by the source file represented by PST. Build an include
6585 partial symtab for each of these included files. */
6588 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6589 struct die_info
*die
,
6590 struct partial_symtab
*pst
)
6593 struct attribute
*attr
;
6595 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6597 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6599 return; /* No linetable, so no includes. */
6601 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6602 that we pass in the raw text_low here; that is ok because we're
6603 only decoding the line table to make include partial symtabs, and
6604 so the addresses aren't really used. */
6605 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6606 pst
->raw_text_low (), 1);
6610 hash_signatured_type (const void *item
)
6612 const struct signatured_type
*sig_type
6613 = (const struct signatured_type
*) item
;
6615 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6616 return sig_type
->signature
;
6620 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6622 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6623 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6625 return lhs
->signature
== rhs
->signature
;
6628 /* Allocate a hash table for signatured types. */
6631 allocate_signatured_type_table (struct objfile
*objfile
)
6633 return htab_create_alloc_ex (41,
6634 hash_signatured_type
,
6637 &objfile
->objfile_obstack
,
6638 hashtab_obstack_allocate
,
6639 dummy_obstack_deallocate
);
6642 /* A helper function to add a signatured type CU to a table. */
6645 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6647 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6648 std::vector
<signatured_type
*> *all_type_units
6649 = (std::vector
<signatured_type
*> *) datum
;
6651 all_type_units
->push_back (sigt
);
6656 /* A helper for create_debug_types_hash_table. Read types from SECTION
6657 and fill them into TYPES_HTAB. It will process only type units,
6658 therefore DW_UT_type. */
6661 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6662 struct dwo_file
*dwo_file
,
6663 dwarf2_section_info
*section
, htab_t
&types_htab
,
6664 rcuh_kind section_kind
)
6666 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6667 struct dwarf2_section_info
*abbrev_section
;
6669 const gdb_byte
*info_ptr
, *end_ptr
;
6671 abbrev_section
= (dwo_file
!= NULL
6672 ? &dwo_file
->sections
.abbrev
6673 : &dwarf2_per_objfile
->abbrev
);
6675 if (dwarf_read_debug
)
6676 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6677 get_section_name (section
),
6678 get_section_file_name (abbrev_section
));
6680 dwarf2_read_section (objfile
, section
);
6681 info_ptr
= section
->buffer
;
6683 if (info_ptr
== NULL
)
6686 /* We can't set abfd until now because the section may be empty or
6687 not present, in which case the bfd is unknown. */
6688 abfd
= get_section_bfd_owner (section
);
6690 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6691 because we don't need to read any dies: the signature is in the
6694 end_ptr
= info_ptr
+ section
->size
;
6695 while (info_ptr
< end_ptr
)
6697 struct signatured_type
*sig_type
;
6698 struct dwo_unit
*dwo_tu
;
6700 const gdb_byte
*ptr
= info_ptr
;
6701 struct comp_unit_head header
;
6702 unsigned int length
;
6704 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6706 /* Initialize it due to a false compiler warning. */
6707 header
.signature
= -1;
6708 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6710 /* We need to read the type's signature in order to build the hash
6711 table, but we don't need anything else just yet. */
6713 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6714 abbrev_section
, ptr
, section_kind
);
6716 length
= get_cu_length (&header
);
6718 /* Skip dummy type units. */
6719 if (ptr
>= info_ptr
+ length
6720 || peek_abbrev_code (abfd
, ptr
) == 0
6721 || header
.unit_type
!= DW_UT_type
)
6727 if (types_htab
== NULL
)
6730 types_htab
= allocate_dwo_unit_table (objfile
);
6732 types_htab
= allocate_signatured_type_table (objfile
);
6738 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6740 dwo_tu
->dwo_file
= dwo_file
;
6741 dwo_tu
->signature
= header
.signature
;
6742 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6743 dwo_tu
->section
= section
;
6744 dwo_tu
->sect_off
= sect_off
;
6745 dwo_tu
->length
= length
;
6749 /* N.B.: type_offset is not usable if this type uses a DWO file.
6750 The real type_offset is in the DWO file. */
6752 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6753 struct signatured_type
);
6754 sig_type
->signature
= header
.signature
;
6755 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6756 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6757 sig_type
->per_cu
.is_debug_types
= 1;
6758 sig_type
->per_cu
.section
= section
;
6759 sig_type
->per_cu
.sect_off
= sect_off
;
6760 sig_type
->per_cu
.length
= length
;
6763 slot
= htab_find_slot (types_htab
,
6764 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6766 gdb_assert (slot
!= NULL
);
6769 sect_offset dup_sect_off
;
6773 const struct dwo_unit
*dup_tu
6774 = (const struct dwo_unit
*) *slot
;
6776 dup_sect_off
= dup_tu
->sect_off
;
6780 const struct signatured_type
*dup_tu
6781 = (const struct signatured_type
*) *slot
;
6783 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6786 complaint (_("debug type entry at offset %s is duplicate to"
6787 " the entry at offset %s, signature %s"),
6788 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6789 hex_string (header
.signature
));
6791 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6793 if (dwarf_read_debug
> 1)
6794 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6795 sect_offset_str (sect_off
),
6796 hex_string (header
.signature
));
6802 /* Create the hash table of all entries in the .debug_types
6803 (or .debug_types.dwo) section(s).
6804 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6805 otherwise it is NULL.
6807 The result is a pointer to the hash table or NULL if there are no types.
6809 Note: This function processes DWO files only, not DWP files. */
6812 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6813 struct dwo_file
*dwo_file
,
6814 gdb::array_view
<dwarf2_section_info
> type_sections
,
6817 for (dwarf2_section_info
§ion
: type_sections
)
6818 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6819 types_htab
, rcuh_kind::TYPE
);
6822 /* Create the hash table of all entries in the .debug_types section,
6823 and initialize all_type_units.
6824 The result is zero if there is an error (e.g. missing .debug_types section),
6825 otherwise non-zero. */
6828 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6830 htab_t types_htab
= NULL
;
6832 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6833 &dwarf2_per_objfile
->info
, types_htab
,
6834 rcuh_kind::COMPILE
);
6835 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6836 dwarf2_per_objfile
->types
, types_htab
);
6837 if (types_htab
== NULL
)
6839 dwarf2_per_objfile
->signatured_types
= NULL
;
6843 dwarf2_per_objfile
->signatured_types
= types_htab
;
6845 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6846 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6848 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6849 &dwarf2_per_objfile
->all_type_units
);
6854 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6855 If SLOT is non-NULL, it is the entry to use in the hash table.
6856 Otherwise we find one. */
6858 static struct signatured_type
*
6859 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6862 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6864 if (dwarf2_per_objfile
->all_type_units
.size ()
6865 == dwarf2_per_objfile
->all_type_units
.capacity ())
6866 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6868 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6869 struct signatured_type
);
6871 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6872 sig_type
->signature
= sig
;
6873 sig_type
->per_cu
.is_debug_types
= 1;
6874 if (dwarf2_per_objfile
->using_index
)
6876 sig_type
->per_cu
.v
.quick
=
6877 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6878 struct dwarf2_per_cu_quick_data
);
6883 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6886 gdb_assert (*slot
== NULL
);
6888 /* The rest of sig_type must be filled in by the caller. */
6892 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6893 Fill in SIG_ENTRY with DWO_ENTRY. */
6896 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6897 struct signatured_type
*sig_entry
,
6898 struct dwo_unit
*dwo_entry
)
6900 /* Make sure we're not clobbering something we don't expect to. */
6901 gdb_assert (! sig_entry
->per_cu
.queued
);
6902 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6903 if (dwarf2_per_objfile
->using_index
)
6905 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6906 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6909 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6910 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6911 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6912 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6913 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6915 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6916 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6917 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6918 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6919 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6920 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6921 sig_entry
->dwo_unit
= dwo_entry
;
6924 /* Subroutine of lookup_signatured_type.
6925 If we haven't read the TU yet, create the signatured_type data structure
6926 for a TU to be read in directly from a DWO file, bypassing the stub.
6927 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6928 using .gdb_index, then when reading a CU we want to stay in the DWO file
6929 containing that CU. Otherwise we could end up reading several other DWO
6930 files (due to comdat folding) to process the transitive closure of all the
6931 mentioned TUs, and that can be slow. The current DWO file will have every
6932 type signature that it needs.
6933 We only do this for .gdb_index because in the psymtab case we already have
6934 to read all the DWOs to build the type unit groups. */
6936 static struct signatured_type
*
6937 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6939 struct dwarf2_per_objfile
*dwarf2_per_objfile
6940 = cu
->per_cu
->dwarf2_per_objfile
;
6941 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6942 struct dwo_file
*dwo_file
;
6943 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6944 struct signatured_type find_sig_entry
, *sig_entry
;
6947 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6949 /* If TU skeletons have been removed then we may not have read in any
6951 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6953 dwarf2_per_objfile
->signatured_types
6954 = allocate_signatured_type_table (objfile
);
6957 /* We only ever need to read in one copy of a signatured type.
6958 Use the global signatured_types array to do our own comdat-folding
6959 of types. If this is the first time we're reading this TU, and
6960 the TU has an entry in .gdb_index, replace the recorded data from
6961 .gdb_index with this TU. */
6963 find_sig_entry
.signature
= sig
;
6964 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6965 &find_sig_entry
, INSERT
);
6966 sig_entry
= (struct signatured_type
*) *slot
;
6968 /* We can get here with the TU already read, *or* in the process of being
6969 read. Don't reassign the global entry to point to this DWO if that's
6970 the case. Also note that if the TU is already being read, it may not
6971 have come from a DWO, the program may be a mix of Fission-compiled
6972 code and non-Fission-compiled code. */
6974 /* Have we already tried to read this TU?
6975 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6976 needn't exist in the global table yet). */
6977 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6980 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6981 dwo_unit of the TU itself. */
6982 dwo_file
= cu
->dwo_unit
->dwo_file
;
6984 /* Ok, this is the first time we're reading this TU. */
6985 if (dwo_file
->tus
== NULL
)
6987 find_dwo_entry
.signature
= sig
;
6988 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
6989 if (dwo_entry
== NULL
)
6992 /* If the global table doesn't have an entry for this TU, add one. */
6993 if (sig_entry
== NULL
)
6994 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6996 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6997 sig_entry
->per_cu
.tu_read
= 1;
7001 /* Subroutine of lookup_signatured_type.
7002 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
7003 then try the DWP file. If the TU stub (skeleton) has been removed then
7004 it won't be in .gdb_index. */
7006 static struct signatured_type
*
7007 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7009 struct dwarf2_per_objfile
*dwarf2_per_objfile
7010 = cu
->per_cu
->dwarf2_per_objfile
;
7011 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7012 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
7013 struct dwo_unit
*dwo_entry
;
7014 struct signatured_type find_sig_entry
, *sig_entry
;
7017 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
7018 gdb_assert (dwp_file
!= NULL
);
7020 /* If TU skeletons have been removed then we may not have read in any
7022 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7024 dwarf2_per_objfile
->signatured_types
7025 = allocate_signatured_type_table (objfile
);
7028 find_sig_entry
.signature
= sig
;
7029 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7030 &find_sig_entry
, INSERT
);
7031 sig_entry
= (struct signatured_type
*) *slot
;
7033 /* Have we already tried to read this TU?
7034 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7035 needn't exist in the global table yet). */
7036 if (sig_entry
!= NULL
)
7039 if (dwp_file
->tus
== NULL
)
7041 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
7042 sig
, 1 /* is_debug_types */);
7043 if (dwo_entry
== NULL
)
7046 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7047 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7052 /* Lookup a signature based type for DW_FORM_ref_sig8.
7053 Returns NULL if signature SIG is not present in the table.
7054 It is up to the caller to complain about this. */
7056 static struct signatured_type
*
7057 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7059 struct dwarf2_per_objfile
*dwarf2_per_objfile
7060 = cu
->per_cu
->dwarf2_per_objfile
;
7063 && dwarf2_per_objfile
->using_index
)
7065 /* We're in a DWO/DWP file, and we're using .gdb_index.
7066 These cases require special processing. */
7067 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7068 return lookup_dwo_signatured_type (cu
, sig
);
7070 return lookup_dwp_signatured_type (cu
, sig
);
7074 struct signatured_type find_entry
, *entry
;
7076 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7078 find_entry
.signature
= sig
;
7079 entry
= ((struct signatured_type
*)
7080 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7085 /* Low level DIE reading support. */
7087 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7090 init_cu_die_reader (struct die_reader_specs
*reader
,
7091 struct dwarf2_cu
*cu
,
7092 struct dwarf2_section_info
*section
,
7093 struct dwo_file
*dwo_file
,
7094 struct abbrev_table
*abbrev_table
)
7096 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7097 reader
->abfd
= get_section_bfd_owner (section
);
7099 reader
->dwo_file
= dwo_file
;
7100 reader
->die_section
= section
;
7101 reader
->buffer
= section
->buffer
;
7102 reader
->buffer_end
= section
->buffer
+ section
->size
;
7103 reader
->comp_dir
= NULL
;
7104 reader
->abbrev_table
= abbrev_table
;
7107 /* Subroutine of init_cutu_and_read_dies to simplify it.
7108 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7109 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7112 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7113 from it to the DIE in the DWO. If NULL we are skipping the stub.
7114 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7115 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7116 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7117 STUB_COMP_DIR may be non-NULL.
7118 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7119 are filled in with the info of the DIE from the DWO file.
7120 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7121 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7122 kept around for at least as long as *RESULT_READER.
7124 The result is non-zero if a valid (non-dummy) DIE was found. */
7127 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7128 struct dwo_unit
*dwo_unit
,
7129 struct die_info
*stub_comp_unit_die
,
7130 const char *stub_comp_dir
,
7131 struct die_reader_specs
*result_reader
,
7132 const gdb_byte
**result_info_ptr
,
7133 struct die_info
**result_comp_unit_die
,
7134 int *result_has_children
,
7135 abbrev_table_up
*result_dwo_abbrev_table
)
7137 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7138 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7139 struct dwarf2_cu
*cu
= this_cu
->cu
;
7141 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7142 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7143 int i
,num_extra_attrs
;
7144 struct dwarf2_section_info
*dwo_abbrev_section
;
7145 struct attribute
*attr
;
7146 struct die_info
*comp_unit_die
;
7148 /* At most one of these may be provided. */
7149 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7151 /* These attributes aren't processed until later:
7152 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7153 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7154 referenced later. However, these attributes are found in the stub
7155 which we won't have later. In order to not impose this complication
7156 on the rest of the code, we read them here and copy them to the
7165 if (stub_comp_unit_die
!= NULL
)
7167 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7169 if (! this_cu
->is_debug_types
)
7170 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7171 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7172 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7173 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7174 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7176 /* There should be a DW_AT_addr_base attribute here (if needed).
7177 We need the value before we can process DW_FORM_GNU_addr_index
7178 or DW_FORM_addrx. */
7180 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7182 cu
->addr_base
= DW_UNSND (attr
);
7184 /* There should be a DW_AT_ranges_base attribute here (if needed).
7185 We need the value before we can process DW_AT_ranges. */
7186 cu
->ranges_base
= 0;
7187 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7189 cu
->ranges_base
= DW_UNSND (attr
);
7191 else if (stub_comp_dir
!= NULL
)
7193 /* Reconstruct the comp_dir attribute to simplify the code below. */
7194 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7195 comp_dir
->name
= DW_AT_comp_dir
;
7196 comp_dir
->form
= DW_FORM_string
;
7197 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7198 DW_STRING (comp_dir
) = stub_comp_dir
;
7201 /* Set up for reading the DWO CU/TU. */
7202 cu
->dwo_unit
= dwo_unit
;
7203 dwarf2_section_info
*section
= dwo_unit
->section
;
7204 dwarf2_read_section (objfile
, section
);
7205 abfd
= get_section_bfd_owner (section
);
7206 begin_info_ptr
= info_ptr
= (section
->buffer
7207 + to_underlying (dwo_unit
->sect_off
));
7208 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7210 if (this_cu
->is_debug_types
)
7212 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7214 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7215 &cu
->header
, section
,
7217 info_ptr
, rcuh_kind::TYPE
);
7218 /* This is not an assert because it can be caused by bad debug info. */
7219 if (sig_type
->signature
!= cu
->header
.signature
)
7221 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7222 " TU at offset %s [in module %s]"),
7223 hex_string (sig_type
->signature
),
7224 hex_string (cu
->header
.signature
),
7225 sect_offset_str (dwo_unit
->sect_off
),
7226 bfd_get_filename (abfd
));
7228 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7229 /* For DWOs coming from DWP files, we don't know the CU length
7230 nor the type's offset in the TU until now. */
7231 dwo_unit
->length
= get_cu_length (&cu
->header
);
7232 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7234 /* Establish the type offset that can be used to lookup the type.
7235 For DWO files, we don't know it until now. */
7236 sig_type
->type_offset_in_section
7237 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7241 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7242 &cu
->header
, section
,
7244 info_ptr
, rcuh_kind::COMPILE
);
7245 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7246 /* For DWOs coming from DWP files, we don't know the CU length
7248 dwo_unit
->length
= get_cu_length (&cu
->header
);
7251 *result_dwo_abbrev_table
7252 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7253 cu
->header
.abbrev_sect_off
);
7254 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7255 result_dwo_abbrev_table
->get ());
7257 /* Read in the die, but leave space to copy over the attributes
7258 from the stub. This has the benefit of simplifying the rest of
7259 the code - all the work to maintain the illusion of a single
7260 DW_TAG_{compile,type}_unit DIE is done here. */
7261 num_extra_attrs
= ((stmt_list
!= NULL
)
7265 + (comp_dir
!= NULL
));
7266 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7267 result_has_children
, num_extra_attrs
);
7269 /* Copy over the attributes from the stub to the DIE we just read in. */
7270 comp_unit_die
= *result_comp_unit_die
;
7271 i
= comp_unit_die
->num_attrs
;
7272 if (stmt_list
!= NULL
)
7273 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7275 comp_unit_die
->attrs
[i
++] = *low_pc
;
7276 if (high_pc
!= NULL
)
7277 comp_unit_die
->attrs
[i
++] = *high_pc
;
7279 comp_unit_die
->attrs
[i
++] = *ranges
;
7280 if (comp_dir
!= NULL
)
7281 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7282 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7284 if (dwarf_die_debug
)
7286 fprintf_unfiltered (gdb_stdlog
,
7287 "Read die from %s@0x%x of %s:\n",
7288 get_section_name (section
),
7289 (unsigned) (begin_info_ptr
- section
->buffer
),
7290 bfd_get_filename (abfd
));
7291 dump_die (comp_unit_die
, dwarf_die_debug
);
7294 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7295 TUs by skipping the stub and going directly to the entry in the DWO file.
7296 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7297 to get it via circuitous means. Blech. */
7298 if (comp_dir
!= NULL
)
7299 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7301 /* Skip dummy compilation units. */
7302 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7303 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7306 *result_info_ptr
= info_ptr
;
7310 /* Subroutine of init_cutu_and_read_dies to simplify it.
7311 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7312 Returns NULL if the specified DWO unit cannot be found. */
7314 static struct dwo_unit
*
7315 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7316 struct die_info
*comp_unit_die
)
7318 struct dwarf2_cu
*cu
= this_cu
->cu
;
7320 struct dwo_unit
*dwo_unit
;
7321 const char *comp_dir
, *dwo_name
;
7323 gdb_assert (cu
!= NULL
);
7325 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7326 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7327 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7329 if (this_cu
->is_debug_types
)
7331 struct signatured_type
*sig_type
;
7333 /* Since this_cu is the first member of struct signatured_type,
7334 we can go from a pointer to one to a pointer to the other. */
7335 sig_type
= (struct signatured_type
*) this_cu
;
7336 signature
= sig_type
->signature
;
7337 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7341 struct attribute
*attr
;
7343 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7345 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7347 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7348 signature
= DW_UNSND (attr
);
7349 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7356 /* Subroutine of init_cutu_and_read_dies to simplify it.
7357 See it for a description of the parameters.
7358 Read a TU directly from a DWO file, bypassing the stub. */
7361 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7362 int use_existing_cu
, int keep
,
7363 die_reader_func_ftype
*die_reader_func
,
7366 std::unique_ptr
<dwarf2_cu
> new_cu
;
7367 struct signatured_type
*sig_type
;
7368 struct die_reader_specs reader
;
7369 const gdb_byte
*info_ptr
;
7370 struct die_info
*comp_unit_die
;
7372 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7374 /* Verify we can do the following downcast, and that we have the
7376 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7377 sig_type
= (struct signatured_type
*) this_cu
;
7378 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7380 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7382 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7383 /* There's no need to do the rereading_dwo_cu handling that
7384 init_cutu_and_read_dies does since we don't read the stub. */
7388 /* If !use_existing_cu, this_cu->cu must be NULL. */
7389 gdb_assert (this_cu
->cu
== NULL
);
7390 new_cu
.reset (new dwarf2_cu (this_cu
));
7393 /* A future optimization, if needed, would be to use an existing
7394 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7395 could share abbrev tables. */
7397 /* The abbreviation table used by READER, this must live at least as long as
7399 abbrev_table_up dwo_abbrev_table
;
7401 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7402 NULL
/* stub_comp_unit_die */,
7403 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7405 &comp_unit_die
, &has_children
,
7406 &dwo_abbrev_table
) == 0)
7412 /* All the "real" work is done here. */
7413 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7415 /* This duplicates the code in init_cutu_and_read_dies,
7416 but the alternative is making the latter more complex.
7417 This function is only for the special case of using DWO files directly:
7418 no point in overly complicating the general case just to handle this. */
7419 if (new_cu
!= NULL
&& keep
)
7421 /* Link this CU into read_in_chain. */
7422 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7423 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7424 /* The chain owns it now. */
7429 /* Initialize a CU (or TU) and read its DIEs.
7430 If the CU defers to a DWO file, read the DWO file as well.
7432 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7433 Otherwise the table specified in the comp unit header is read in and used.
7434 This is an optimization for when we already have the abbrev table.
7436 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7437 Otherwise, a new CU is allocated with xmalloc.
7439 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7440 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7442 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7443 linker) then DIE_READER_FUNC will not get called. */
7446 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7447 struct abbrev_table
*abbrev_table
,
7448 int use_existing_cu
, int keep
,
7450 die_reader_func_ftype
*die_reader_func
,
7453 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7454 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7455 struct dwarf2_section_info
*section
= this_cu
->section
;
7456 bfd
*abfd
= get_section_bfd_owner (section
);
7457 struct dwarf2_cu
*cu
;
7458 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7459 struct die_reader_specs reader
;
7460 struct die_info
*comp_unit_die
;
7462 struct attribute
*attr
;
7463 struct signatured_type
*sig_type
= NULL
;
7464 struct dwarf2_section_info
*abbrev_section
;
7465 /* Non-zero if CU currently points to a DWO file and we need to
7466 reread it. When this happens we need to reread the skeleton die
7467 before we can reread the DWO file (this only applies to CUs, not TUs). */
7468 int rereading_dwo_cu
= 0;
7470 if (dwarf_die_debug
)
7471 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7472 this_cu
->is_debug_types
? "type" : "comp",
7473 sect_offset_str (this_cu
->sect_off
));
7475 if (use_existing_cu
)
7478 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7479 file (instead of going through the stub), short-circuit all of this. */
7480 if (this_cu
->reading_dwo_directly
)
7482 /* Narrow down the scope of possibilities to have to understand. */
7483 gdb_assert (this_cu
->is_debug_types
);
7484 gdb_assert (abbrev_table
== NULL
);
7485 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7486 die_reader_func
, data
);
7490 /* This is cheap if the section is already read in. */
7491 dwarf2_read_section (objfile
, section
);
7493 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7495 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7497 std::unique_ptr
<dwarf2_cu
> new_cu
;
7498 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7501 /* If this CU is from a DWO file we need to start over, we need to
7502 refetch the attributes from the skeleton CU.
7503 This could be optimized by retrieving those attributes from when we
7504 were here the first time: the previous comp_unit_die was stored in
7505 comp_unit_obstack. But there's no data yet that we need this
7507 if (cu
->dwo_unit
!= NULL
)
7508 rereading_dwo_cu
= 1;
7512 /* If !use_existing_cu, this_cu->cu must be NULL. */
7513 gdb_assert (this_cu
->cu
== NULL
);
7514 new_cu
.reset (new dwarf2_cu (this_cu
));
7518 /* Get the header. */
7519 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7521 /* We already have the header, there's no need to read it in again. */
7522 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7526 if (this_cu
->is_debug_types
)
7528 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7529 &cu
->header
, section
,
7530 abbrev_section
, info_ptr
,
7533 /* Since per_cu is the first member of struct signatured_type,
7534 we can go from a pointer to one to a pointer to the other. */
7535 sig_type
= (struct signatured_type
*) this_cu
;
7536 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7537 gdb_assert (sig_type
->type_offset_in_tu
7538 == cu
->header
.type_cu_offset_in_tu
);
7539 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7541 /* LENGTH has not been set yet for type units if we're
7542 using .gdb_index. */
7543 this_cu
->length
= get_cu_length (&cu
->header
);
7545 /* Establish the type offset that can be used to lookup the type. */
7546 sig_type
->type_offset_in_section
=
7547 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7549 this_cu
->dwarf_version
= cu
->header
.version
;
7553 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7554 &cu
->header
, section
,
7557 rcuh_kind::COMPILE
);
7559 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7560 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7561 this_cu
->dwarf_version
= cu
->header
.version
;
7565 /* Skip dummy compilation units. */
7566 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7567 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7570 /* If we don't have them yet, read the abbrevs for this compilation unit.
7571 And if we need to read them now, make sure they're freed when we're
7572 done (own the table through ABBREV_TABLE_HOLDER). */
7573 abbrev_table_up abbrev_table_holder
;
7574 if (abbrev_table
!= NULL
)
7575 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7579 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7580 cu
->header
.abbrev_sect_off
);
7581 abbrev_table
= abbrev_table_holder
.get ();
7584 /* Read the top level CU/TU die. */
7585 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7586 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7588 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7591 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7592 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7593 table from the DWO file and pass the ownership over to us. It will be
7594 referenced from READER, so we must make sure to free it after we're done
7597 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7598 DWO CU, that this test will fail (the attribute will not be present). */
7599 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7600 abbrev_table_up dwo_abbrev_table
;
7603 struct dwo_unit
*dwo_unit
;
7604 struct die_info
*dwo_comp_unit_die
;
7608 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7609 " has children (offset %s) [in module %s]"),
7610 sect_offset_str (this_cu
->sect_off
),
7611 bfd_get_filename (abfd
));
7613 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7614 if (dwo_unit
!= NULL
)
7616 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7617 comp_unit_die
, NULL
,
7619 &dwo_comp_unit_die
, &has_children
,
7620 &dwo_abbrev_table
) == 0)
7625 comp_unit_die
= dwo_comp_unit_die
;
7629 /* Yikes, we couldn't find the rest of the DIE, we only have
7630 the stub. A complaint has already been logged. There's
7631 not much more we can do except pass on the stub DIE to
7632 die_reader_func. We don't want to throw an error on bad
7637 /* All of the above is setup for this call. Yikes. */
7638 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7640 /* Done, clean up. */
7641 if (new_cu
!= NULL
&& keep
)
7643 /* Link this CU into read_in_chain. */
7644 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7645 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7646 /* The chain owns it now. */
7651 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7652 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7653 to have already done the lookup to find the DWO file).
7655 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7656 THIS_CU->is_debug_types, but nothing else.
7658 We fill in THIS_CU->length.
7660 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7661 linker) then DIE_READER_FUNC will not get called.
7663 THIS_CU->cu is always freed when done.
7664 This is done in order to not leave THIS_CU->cu in a state where we have
7665 to care whether it refers to the "main" CU or the DWO CU. */
7668 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7669 struct dwo_file
*dwo_file
,
7670 die_reader_func_ftype
*die_reader_func
,
7673 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7674 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7675 struct dwarf2_section_info
*section
= this_cu
->section
;
7676 bfd
*abfd
= get_section_bfd_owner (section
);
7677 struct dwarf2_section_info
*abbrev_section
;
7678 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7679 struct die_reader_specs reader
;
7680 struct die_info
*comp_unit_die
;
7683 if (dwarf_die_debug
)
7684 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7685 this_cu
->is_debug_types
? "type" : "comp",
7686 sect_offset_str (this_cu
->sect_off
));
7688 gdb_assert (this_cu
->cu
== NULL
);
7690 abbrev_section
= (dwo_file
!= NULL
7691 ? &dwo_file
->sections
.abbrev
7692 : get_abbrev_section_for_cu (this_cu
));
7694 /* This is cheap if the section is already read in. */
7695 dwarf2_read_section (objfile
, section
);
7697 struct dwarf2_cu
cu (this_cu
);
7699 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7700 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7701 &cu
.header
, section
,
7702 abbrev_section
, info_ptr
,
7703 (this_cu
->is_debug_types
7705 : rcuh_kind::COMPILE
));
7707 this_cu
->length
= get_cu_length (&cu
.header
);
7709 /* Skip dummy compilation units. */
7710 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7711 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7714 abbrev_table_up abbrev_table
7715 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7716 cu
.header
.abbrev_sect_off
);
7718 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7719 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7721 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7724 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7725 does not lookup the specified DWO file.
7726 This cannot be used to read DWO files.
7728 THIS_CU->cu is always freed when done.
7729 This is done in order to not leave THIS_CU->cu in a state where we have
7730 to care whether it refers to the "main" CU or the DWO CU.
7731 We can revisit this if the data shows there's a performance issue. */
7734 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7735 die_reader_func_ftype
*die_reader_func
,
7738 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7741 /* Type Unit Groups.
7743 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7744 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7745 so that all types coming from the same compilation (.o file) are grouped
7746 together. A future step could be to put the types in the same symtab as
7747 the CU the types ultimately came from. */
7750 hash_type_unit_group (const void *item
)
7752 const struct type_unit_group
*tu_group
7753 = (const struct type_unit_group
*) item
;
7755 return hash_stmt_list_entry (&tu_group
->hash
);
7759 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7761 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7762 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7764 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7767 /* Allocate a hash table for type unit groups. */
7770 allocate_type_unit_groups_table (struct objfile
*objfile
)
7772 return htab_create_alloc_ex (3,
7773 hash_type_unit_group
,
7776 &objfile
->objfile_obstack
,
7777 hashtab_obstack_allocate
,
7778 dummy_obstack_deallocate
);
7781 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7782 partial symtabs. We combine several TUs per psymtab to not let the size
7783 of any one psymtab grow too big. */
7784 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7785 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7787 /* Helper routine for get_type_unit_group.
7788 Create the type_unit_group object used to hold one or more TUs. */
7790 static struct type_unit_group
*
7791 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7793 struct dwarf2_per_objfile
*dwarf2_per_objfile
7794 = cu
->per_cu
->dwarf2_per_objfile
;
7795 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7796 struct dwarf2_per_cu_data
*per_cu
;
7797 struct type_unit_group
*tu_group
;
7799 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7800 struct type_unit_group
);
7801 per_cu
= &tu_group
->per_cu
;
7802 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7804 if (dwarf2_per_objfile
->using_index
)
7806 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7807 struct dwarf2_per_cu_quick_data
);
7811 unsigned int line_offset
= to_underlying (line_offset_struct
);
7812 struct partial_symtab
*pst
;
7815 /* Give the symtab a useful name for debug purposes. */
7816 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7817 name
= string_printf ("<type_units_%d>",
7818 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7820 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7822 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7826 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7827 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7832 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7833 STMT_LIST is a DW_AT_stmt_list attribute. */
7835 static struct type_unit_group
*
7836 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7838 struct dwarf2_per_objfile
*dwarf2_per_objfile
7839 = cu
->per_cu
->dwarf2_per_objfile
;
7840 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7841 struct type_unit_group
*tu_group
;
7843 unsigned int line_offset
;
7844 struct type_unit_group type_unit_group_for_lookup
;
7846 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7848 dwarf2_per_objfile
->type_unit_groups
=
7849 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7852 /* Do we need to create a new group, or can we use an existing one? */
7856 line_offset
= DW_UNSND (stmt_list
);
7857 ++tu_stats
->nr_symtab_sharers
;
7861 /* Ugh, no stmt_list. Rare, but we have to handle it.
7862 We can do various things here like create one group per TU or
7863 spread them over multiple groups to split up the expansion work.
7864 To avoid worst case scenarios (too many groups or too large groups)
7865 we, umm, group them in bunches. */
7866 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7867 | (tu_stats
->nr_stmt_less_type_units
7868 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7869 ++tu_stats
->nr_stmt_less_type_units
;
7872 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7873 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7874 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7875 &type_unit_group_for_lookup
, INSERT
);
7878 tu_group
= (struct type_unit_group
*) *slot
;
7879 gdb_assert (tu_group
!= NULL
);
7883 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7884 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7886 ++tu_stats
->nr_symtabs
;
7892 /* Partial symbol tables. */
7894 /* Create a psymtab named NAME and assign it to PER_CU.
7896 The caller must fill in the following details:
7897 dirname, textlow, texthigh. */
7899 static struct partial_symtab
*
7900 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7902 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7903 struct partial_symtab
*pst
;
7905 pst
= start_psymtab_common (objfile
, name
, 0);
7907 pst
->psymtabs_addrmap_supported
= 1;
7909 /* This is the glue that links PST into GDB's symbol API. */
7910 pst
->read_symtab_private
= per_cu
;
7911 pst
->read_symtab
= dwarf2_read_symtab
;
7912 per_cu
->v
.psymtab
= pst
;
7917 /* The DATA object passed to process_psymtab_comp_unit_reader has this
7920 struct process_psymtab_comp_unit_data
7922 /* True if we are reading a DW_TAG_partial_unit. */
7924 int want_partial_unit
;
7926 /* The "pretend" language that is used if the CU doesn't declare a
7929 enum language pretend_language
;
7932 /* die_reader_func for process_psymtab_comp_unit. */
7935 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7936 const gdb_byte
*info_ptr
,
7937 struct die_info
*comp_unit_die
,
7941 struct dwarf2_cu
*cu
= reader
->cu
;
7942 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7943 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7944 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7946 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7947 struct partial_symtab
*pst
;
7948 enum pc_bounds_kind cu_bounds_kind
;
7949 const char *filename
;
7950 struct process_psymtab_comp_unit_data
*info
7951 = (struct process_psymtab_comp_unit_data
*) data
;
7953 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
7956 gdb_assert (! per_cu
->is_debug_types
);
7958 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
7960 /* Allocate a new partial symbol table structure. */
7961 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7962 if (filename
== NULL
)
7965 pst
= create_partial_symtab (per_cu
, filename
);
7967 /* This must be done before calling dwarf2_build_include_psymtabs. */
7968 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7970 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7972 dwarf2_find_base_address (comp_unit_die
, cu
);
7974 /* Possibly set the default values of LOWPC and HIGHPC from
7976 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7977 &best_highpc
, cu
, pst
);
7978 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7981 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7984 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7986 /* Store the contiguous range if it is not empty; it can be
7987 empty for CUs with no code. */
7988 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7992 /* Check if comp unit has_children.
7993 If so, read the rest of the partial symbols from this comp unit.
7994 If not, there's no more debug_info for this comp unit. */
7997 struct partial_die_info
*first_die
;
7998 CORE_ADDR lowpc
, highpc
;
8000 lowpc
= ((CORE_ADDR
) -1);
8001 highpc
= ((CORE_ADDR
) 0);
8003 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8005 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
8006 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
8008 /* If we didn't find a lowpc, set it to highpc to avoid
8009 complaints from `maint check'. */
8010 if (lowpc
== ((CORE_ADDR
) -1))
8013 /* If the compilation unit didn't have an explicit address range,
8014 then use the information extracted from its child dies. */
8015 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
8018 best_highpc
= highpc
;
8021 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
8022 best_lowpc
+ baseaddr
)
8024 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
8025 best_highpc
+ baseaddr
)
8028 end_psymtab_common (objfile
, pst
);
8030 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
8033 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8034 struct dwarf2_per_cu_data
*iter
;
8036 /* Fill in 'dependencies' here; we fill in 'users' in a
8038 pst
->number_of_dependencies
= len
;
8040 = objfile
->partial_symtabs
->allocate_dependencies (len
);
8042 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8045 pst
->dependencies
[i
] = iter
->v
.psymtab
;
8047 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8050 /* Get the list of files included in the current compilation unit,
8051 and build a psymtab for each of them. */
8052 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8054 if (dwarf_read_debug
)
8055 fprintf_unfiltered (gdb_stdlog
,
8056 "Psymtab for %s unit @%s: %s - %s"
8057 ", %d global, %d static syms\n",
8058 per_cu
->is_debug_types
? "type" : "comp",
8059 sect_offset_str (per_cu
->sect_off
),
8060 paddress (gdbarch
, pst
->text_low (objfile
)),
8061 paddress (gdbarch
, pst
->text_high (objfile
)),
8062 pst
->n_global_syms
, pst
->n_static_syms
);
8065 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8066 Process compilation unit THIS_CU for a psymtab. */
8069 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8070 int want_partial_unit
,
8071 enum language pretend_language
)
8073 /* If this compilation unit was already read in, free the
8074 cached copy in order to read it in again. This is
8075 necessary because we skipped some symbols when we first
8076 read in the compilation unit (see load_partial_dies).
8077 This problem could be avoided, but the benefit is unclear. */
8078 if (this_cu
->cu
!= NULL
)
8079 free_one_cached_comp_unit (this_cu
);
8081 if (this_cu
->is_debug_types
)
8082 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8083 build_type_psymtabs_reader
, NULL
);
8086 process_psymtab_comp_unit_data info
;
8087 info
.want_partial_unit
= want_partial_unit
;
8088 info
.pretend_language
= pretend_language
;
8089 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8090 process_psymtab_comp_unit_reader
, &info
);
8093 /* Age out any secondary CUs. */
8094 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8097 /* Reader function for build_type_psymtabs. */
8100 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8101 const gdb_byte
*info_ptr
,
8102 struct die_info
*type_unit_die
,
8106 struct dwarf2_per_objfile
*dwarf2_per_objfile
8107 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8108 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8109 struct dwarf2_cu
*cu
= reader
->cu
;
8110 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8111 struct signatured_type
*sig_type
;
8112 struct type_unit_group
*tu_group
;
8113 struct attribute
*attr
;
8114 struct partial_die_info
*first_die
;
8115 CORE_ADDR lowpc
, highpc
;
8116 struct partial_symtab
*pst
;
8118 gdb_assert (data
== NULL
);
8119 gdb_assert (per_cu
->is_debug_types
);
8120 sig_type
= (struct signatured_type
*) per_cu
;
8125 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8126 tu_group
= get_type_unit_group (cu
, attr
);
8128 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
8130 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8131 pst
= create_partial_symtab (per_cu
, "");
8134 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8136 lowpc
= (CORE_ADDR
) -1;
8137 highpc
= (CORE_ADDR
) 0;
8138 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8140 end_psymtab_common (objfile
, pst
);
8143 /* Struct used to sort TUs by their abbreviation table offset. */
8145 struct tu_abbrev_offset
8147 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
8148 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
8151 signatured_type
*sig_type
;
8152 sect_offset abbrev_offset
;
8155 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8158 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8159 const struct tu_abbrev_offset
&b
)
8161 return a
.abbrev_offset
< b
.abbrev_offset
;
8164 /* Efficiently read all the type units.
8165 This does the bulk of the work for build_type_psymtabs.
8167 The efficiency is because we sort TUs by the abbrev table they use and
8168 only read each abbrev table once. In one program there are 200K TUs
8169 sharing 8K abbrev tables.
8171 The main purpose of this function is to support building the
8172 dwarf2_per_objfile->type_unit_groups table.
8173 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8174 can collapse the search space by grouping them by stmt_list.
8175 The savings can be significant, in the same program from above the 200K TUs
8176 share 8K stmt_list tables.
8178 FUNC is expected to call get_type_unit_group, which will create the
8179 struct type_unit_group if necessary and add it to
8180 dwarf2_per_objfile->type_unit_groups. */
8183 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8185 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8186 abbrev_table_up abbrev_table
;
8187 sect_offset abbrev_offset
;
8189 /* It's up to the caller to not call us multiple times. */
8190 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8192 if (dwarf2_per_objfile
->all_type_units
.empty ())
8195 /* TUs typically share abbrev tables, and there can be way more TUs than
8196 abbrev tables. Sort by abbrev table to reduce the number of times we
8197 read each abbrev table in.
8198 Alternatives are to punt or to maintain a cache of abbrev tables.
8199 This is simpler and efficient enough for now.
8201 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8202 symtab to use). Typically TUs with the same abbrev offset have the same
8203 stmt_list value too so in practice this should work well.
8205 The basic algorithm here is:
8207 sort TUs by abbrev table
8208 for each TU with same abbrev table:
8209 read abbrev table if first user
8210 read TU top level DIE
8211 [IWBN if DWO skeletons had DW_AT_stmt_list]
8214 if (dwarf_read_debug
)
8215 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8217 /* Sort in a separate table to maintain the order of all_type_units
8218 for .gdb_index: TU indices directly index all_type_units. */
8219 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
8220 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
8222 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
8223 sorted_by_abbrev
.emplace_back
8224 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
8225 sig_type
->per_cu
.section
,
8226 sig_type
->per_cu
.sect_off
));
8228 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8229 sort_tu_by_abbrev_offset
);
8231 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8233 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
8235 /* Switch to the next abbrev table if necessary. */
8236 if (abbrev_table
== NULL
8237 || tu
.abbrev_offset
!= abbrev_offset
)
8239 abbrev_offset
= tu
.abbrev_offset
;
8241 abbrev_table_read_table (dwarf2_per_objfile
,
8242 &dwarf2_per_objfile
->abbrev
,
8244 ++tu_stats
->nr_uniq_abbrev_tables
;
8247 init_cutu_and_read_dies (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
8248 0, 0, false, build_type_psymtabs_reader
, NULL
);
8252 /* Print collected type unit statistics. */
8255 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8257 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8259 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8260 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8261 dwarf2_per_objfile
->all_type_units
.size ());
8262 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8263 tu_stats
->nr_uniq_abbrev_tables
);
8264 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8265 tu_stats
->nr_symtabs
);
8266 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8267 tu_stats
->nr_symtab_sharers
);
8268 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8269 tu_stats
->nr_stmt_less_type_units
);
8270 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8271 tu_stats
->nr_all_type_units_reallocs
);
8274 /* Traversal function for build_type_psymtabs. */
8277 build_type_psymtab_dependencies (void **slot
, void *info
)
8279 struct dwarf2_per_objfile
*dwarf2_per_objfile
8280 = (struct dwarf2_per_objfile
*) info
;
8281 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8282 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8283 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8284 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8285 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
8286 struct signatured_type
*iter
;
8289 gdb_assert (len
> 0);
8290 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8292 pst
->number_of_dependencies
= len
;
8293 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
8295 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
8298 gdb_assert (iter
->per_cu
.is_debug_types
);
8299 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8300 iter
->type_unit_group
= tu_group
;
8303 VEC_free (sig_type_ptr
, tu_group
->tus
);
8308 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8309 Build partial symbol tables for the .debug_types comp-units. */
8312 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8314 if (! create_all_type_units (dwarf2_per_objfile
))
8317 build_type_psymtabs_1 (dwarf2_per_objfile
);
8320 /* Traversal function for process_skeletonless_type_unit.
8321 Read a TU in a DWO file and build partial symbols for it. */
8324 process_skeletonless_type_unit (void **slot
, void *info
)
8326 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8327 struct dwarf2_per_objfile
*dwarf2_per_objfile
8328 = (struct dwarf2_per_objfile
*) info
;
8329 struct signatured_type find_entry
, *entry
;
8331 /* If this TU doesn't exist in the global table, add it and read it in. */
8333 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8335 dwarf2_per_objfile
->signatured_types
8336 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8339 find_entry
.signature
= dwo_unit
->signature
;
8340 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8342 /* If we've already seen this type there's nothing to do. What's happening
8343 is we're doing our own version of comdat-folding here. */
8347 /* This does the job that create_all_type_units would have done for
8349 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8350 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8353 /* This does the job that build_type_psymtabs_1 would have done. */
8354 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0, false,
8355 build_type_psymtabs_reader
, NULL
);
8360 /* Traversal function for process_skeletonless_type_units. */
8363 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8365 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8367 if (dwo_file
->tus
!= NULL
)
8369 htab_traverse_noresize (dwo_file
->tus
,
8370 process_skeletonless_type_unit
, info
);
8376 /* Scan all TUs of DWO files, verifying we've processed them.
8377 This is needed in case a TU was emitted without its skeleton.
8378 Note: This can't be done until we know what all the DWO files are. */
8381 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8383 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8384 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8385 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8387 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
8388 process_dwo_file_for_skeletonless_type_units
,
8389 dwarf2_per_objfile
);
8393 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8396 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8398 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8400 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8405 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8407 /* Set the 'user' field only if it is not already set. */
8408 if (pst
->dependencies
[j
]->user
== NULL
)
8409 pst
->dependencies
[j
]->user
= pst
;
8414 /* Build the partial symbol table by doing a quick pass through the
8415 .debug_info and .debug_abbrev sections. */
8418 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8420 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8422 if (dwarf_read_debug
)
8424 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8425 objfile_name (objfile
));
8428 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8430 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8432 /* Any cached compilation units will be linked by the per-objfile
8433 read_in_chain. Make sure to free them when we're done. */
8434 free_cached_comp_units
freer (dwarf2_per_objfile
);
8436 build_type_psymtabs (dwarf2_per_objfile
);
8438 create_all_comp_units (dwarf2_per_objfile
);
8440 /* Create a temporary address map on a temporary obstack. We later
8441 copy this to the final obstack. */
8442 auto_obstack temp_obstack
;
8444 scoped_restore save_psymtabs_addrmap
8445 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
8446 addrmap_create_mutable (&temp_obstack
));
8448 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8449 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8451 /* This has to wait until we read the CUs, we need the list of DWOs. */
8452 process_skeletonless_type_units (dwarf2_per_objfile
);
8454 /* Now that all TUs have been processed we can fill in the dependencies. */
8455 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8457 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8458 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8461 if (dwarf_read_debug
)
8462 print_tu_stats (dwarf2_per_objfile
);
8464 set_partial_user (dwarf2_per_objfile
);
8466 objfile
->partial_symtabs
->psymtabs_addrmap
8467 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
8468 objfile
->partial_symtabs
->obstack ());
8469 /* At this point we want to keep the address map. */
8470 save_psymtabs_addrmap
.release ();
8472 if (dwarf_read_debug
)
8473 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8474 objfile_name (objfile
));
8477 /* die_reader_func for load_partial_comp_unit. */
8480 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8481 const gdb_byte
*info_ptr
,
8482 struct die_info
*comp_unit_die
,
8486 struct dwarf2_cu
*cu
= reader
->cu
;
8488 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8490 /* Check if comp unit has_children.
8491 If so, read the rest of the partial symbols from this comp unit.
8492 If not, there's no more debug_info for this comp unit. */
8494 load_partial_dies (reader
, info_ptr
, 0);
8497 /* Load the partial DIEs for a secondary CU into memory.
8498 This is also used when rereading a primary CU with load_all_dies. */
8501 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8503 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, false,
8504 load_partial_comp_unit_reader
, NULL
);
8508 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8509 struct dwarf2_section_info
*section
,
8510 struct dwarf2_section_info
*abbrev_section
,
8511 unsigned int is_dwz
)
8513 const gdb_byte
*info_ptr
;
8514 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8516 if (dwarf_read_debug
)
8517 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8518 get_section_name (section
),
8519 get_section_file_name (section
));
8521 dwarf2_read_section (objfile
, section
);
8523 info_ptr
= section
->buffer
;
8525 while (info_ptr
< section
->buffer
+ section
->size
)
8527 struct dwarf2_per_cu_data
*this_cu
;
8529 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8531 comp_unit_head cu_header
;
8532 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8533 abbrev_section
, info_ptr
,
8534 rcuh_kind::COMPILE
);
8536 /* Save the compilation unit for later lookup. */
8537 if (cu_header
.unit_type
!= DW_UT_type
)
8539 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8540 struct dwarf2_per_cu_data
);
8541 memset (this_cu
, 0, sizeof (*this_cu
));
8545 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8546 struct signatured_type
);
8547 memset (sig_type
, 0, sizeof (*sig_type
));
8548 sig_type
->signature
= cu_header
.signature
;
8549 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8550 this_cu
= &sig_type
->per_cu
;
8552 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8553 this_cu
->sect_off
= sect_off
;
8554 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8555 this_cu
->is_dwz
= is_dwz
;
8556 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8557 this_cu
->section
= section
;
8559 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8561 info_ptr
= info_ptr
+ this_cu
->length
;
8565 /* Create a list of all compilation units in OBJFILE.
8566 This is only done for -readnow and building partial symtabs. */
8569 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8571 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8572 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8573 &dwarf2_per_objfile
->abbrev
, 0);
8575 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8577 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8581 /* Process all loaded DIEs for compilation unit CU, starting at
8582 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8583 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8584 DW_AT_ranges). See the comments of add_partial_subprogram on how
8585 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8588 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8589 CORE_ADDR
*highpc
, int set_addrmap
,
8590 struct dwarf2_cu
*cu
)
8592 struct partial_die_info
*pdi
;
8594 /* Now, march along the PDI's, descending into ones which have
8595 interesting children but skipping the children of the other ones,
8596 until we reach the end of the compilation unit. */
8604 /* Anonymous namespaces or modules have no name but have interesting
8605 children, so we need to look at them. Ditto for anonymous
8608 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8609 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8610 || pdi
->tag
== DW_TAG_imported_unit
8611 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8615 case DW_TAG_subprogram
:
8616 case DW_TAG_inlined_subroutine
:
8617 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8619 case DW_TAG_constant
:
8620 case DW_TAG_variable
:
8621 case DW_TAG_typedef
:
8622 case DW_TAG_union_type
:
8623 if (!pdi
->is_declaration
)
8625 add_partial_symbol (pdi
, cu
);
8628 case DW_TAG_class_type
:
8629 case DW_TAG_interface_type
:
8630 case DW_TAG_structure_type
:
8631 if (!pdi
->is_declaration
)
8633 add_partial_symbol (pdi
, cu
);
8635 if ((cu
->language
== language_rust
8636 || cu
->language
== language_cplus
) && pdi
->has_children
)
8637 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8640 case DW_TAG_enumeration_type
:
8641 if (!pdi
->is_declaration
)
8642 add_partial_enumeration (pdi
, cu
);
8644 case DW_TAG_base_type
:
8645 case DW_TAG_subrange_type
:
8646 /* File scope base type definitions are added to the partial
8648 add_partial_symbol (pdi
, cu
);
8650 case DW_TAG_namespace
:
8651 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8654 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8656 case DW_TAG_imported_unit
:
8658 struct dwarf2_per_cu_data
*per_cu
;
8660 /* For now we don't handle imported units in type units. */
8661 if (cu
->per_cu
->is_debug_types
)
8663 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8664 " supported in type units [in module %s]"),
8665 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8668 per_cu
= dwarf2_find_containing_comp_unit
8669 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8670 cu
->per_cu
->dwarf2_per_objfile
);
8672 /* Go read the partial unit, if needed. */
8673 if (per_cu
->v
.psymtab
== NULL
)
8674 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8676 VEC_safe_push (dwarf2_per_cu_ptr
,
8677 cu
->per_cu
->imported_symtabs
, per_cu
);
8680 case DW_TAG_imported_declaration
:
8681 add_partial_symbol (pdi
, cu
);
8688 /* If the die has a sibling, skip to the sibling. */
8690 pdi
= pdi
->die_sibling
;
8694 /* Functions used to compute the fully scoped name of a partial DIE.
8696 Normally, this is simple. For C++, the parent DIE's fully scoped
8697 name is concatenated with "::" and the partial DIE's name.
8698 Enumerators are an exception; they use the scope of their parent
8699 enumeration type, i.e. the name of the enumeration type is not
8700 prepended to the enumerator.
8702 There are two complexities. One is DW_AT_specification; in this
8703 case "parent" means the parent of the target of the specification,
8704 instead of the direct parent of the DIE. The other is compilers
8705 which do not emit DW_TAG_namespace; in this case we try to guess
8706 the fully qualified name of structure types from their members'
8707 linkage names. This must be done using the DIE's children rather
8708 than the children of any DW_AT_specification target. We only need
8709 to do this for structures at the top level, i.e. if the target of
8710 any DW_AT_specification (if any; otherwise the DIE itself) does not
8713 /* Compute the scope prefix associated with PDI's parent, in
8714 compilation unit CU. The result will be allocated on CU's
8715 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8716 field. NULL is returned if no prefix is necessary. */
8718 partial_die_parent_scope (struct partial_die_info
*pdi
,
8719 struct dwarf2_cu
*cu
)
8721 const char *grandparent_scope
;
8722 struct partial_die_info
*parent
, *real_pdi
;
8724 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8725 then this means the parent of the specification DIE. */
8728 while (real_pdi
->has_specification
)
8730 auto res
= find_partial_die (real_pdi
->spec_offset
,
8731 real_pdi
->spec_is_dwz
, cu
);
8736 parent
= real_pdi
->die_parent
;
8740 if (parent
->scope_set
)
8741 return parent
->scope
;
8745 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8747 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8748 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8749 Work around this problem here. */
8750 if (cu
->language
== language_cplus
8751 && parent
->tag
== DW_TAG_namespace
8752 && strcmp (parent
->name
, "::") == 0
8753 && grandparent_scope
== NULL
)
8755 parent
->scope
= NULL
;
8756 parent
->scope_set
= 1;
8760 if (pdi
->tag
== DW_TAG_enumerator
)
8761 /* Enumerators should not get the name of the enumeration as a prefix. */
8762 parent
->scope
= grandparent_scope
;
8763 else if (parent
->tag
== DW_TAG_namespace
8764 || parent
->tag
== DW_TAG_module
8765 || parent
->tag
== DW_TAG_structure_type
8766 || parent
->tag
== DW_TAG_class_type
8767 || parent
->tag
== DW_TAG_interface_type
8768 || parent
->tag
== DW_TAG_union_type
8769 || parent
->tag
== DW_TAG_enumeration_type
)
8771 if (grandparent_scope
== NULL
)
8772 parent
->scope
= parent
->name
;
8774 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8776 parent
->name
, 0, cu
);
8780 /* FIXME drow/2004-04-01: What should we be doing with
8781 function-local names? For partial symbols, we should probably be
8783 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8784 dwarf_tag_name (parent
->tag
),
8785 sect_offset_str (pdi
->sect_off
));
8786 parent
->scope
= grandparent_scope
;
8789 parent
->scope_set
= 1;
8790 return parent
->scope
;
8793 /* Return the fully scoped name associated with PDI, from compilation unit
8794 CU. The result will be allocated with malloc. */
8797 partial_die_full_name (struct partial_die_info
*pdi
,
8798 struct dwarf2_cu
*cu
)
8800 const char *parent_scope
;
8802 /* If this is a template instantiation, we can not work out the
8803 template arguments from partial DIEs. So, unfortunately, we have
8804 to go through the full DIEs. At least any work we do building
8805 types here will be reused if full symbols are loaded later. */
8806 if (pdi
->has_template_arguments
)
8810 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8812 struct die_info
*die
;
8813 struct attribute attr
;
8814 struct dwarf2_cu
*ref_cu
= cu
;
8816 /* DW_FORM_ref_addr is using section offset. */
8817 attr
.name
= (enum dwarf_attribute
) 0;
8818 attr
.form
= DW_FORM_ref_addr
;
8819 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8820 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8822 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8826 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8827 if (parent_scope
== NULL
)
8830 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8834 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8836 struct dwarf2_per_objfile
*dwarf2_per_objfile
8837 = cu
->per_cu
->dwarf2_per_objfile
;
8838 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8839 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8841 const char *actual_name
= NULL
;
8843 char *built_actual_name
;
8845 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8847 built_actual_name
= partial_die_full_name (pdi
, cu
);
8848 if (built_actual_name
!= NULL
)
8849 actual_name
= built_actual_name
;
8851 if (actual_name
== NULL
)
8852 actual_name
= pdi
->name
;
8856 case DW_TAG_inlined_subroutine
:
8857 case DW_TAG_subprogram
:
8858 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8860 if (pdi
->is_external
|| cu
->language
== language_ada
)
8862 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
8863 of the global scope. But in Ada, we want to be able to access
8864 nested procedures globally. So all Ada subprograms are stored
8865 in the global scope. */
8866 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8867 built_actual_name
!= NULL
,
8868 VAR_DOMAIN
, LOC_BLOCK
,
8869 SECT_OFF_TEXT (objfile
),
8870 psymbol_placement::GLOBAL
,
8872 cu
->language
, objfile
);
8876 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8877 built_actual_name
!= NULL
,
8878 VAR_DOMAIN
, LOC_BLOCK
,
8879 SECT_OFF_TEXT (objfile
),
8880 psymbol_placement::STATIC
,
8881 addr
, cu
->language
, objfile
);
8884 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8885 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8887 case DW_TAG_constant
:
8888 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8889 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8890 -1, (pdi
->is_external
8891 ? psymbol_placement::GLOBAL
8892 : psymbol_placement::STATIC
),
8893 0, cu
->language
, objfile
);
8895 case DW_TAG_variable
:
8897 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8901 && !dwarf2_per_objfile
->has_section_at_zero
)
8903 /* A global or static variable may also have been stripped
8904 out by the linker if unused, in which case its address
8905 will be nullified; do not add such variables into partial
8906 symbol table then. */
8908 else if (pdi
->is_external
)
8911 Don't enter into the minimal symbol tables as there is
8912 a minimal symbol table entry from the ELF symbols already.
8913 Enter into partial symbol table if it has a location
8914 descriptor or a type.
8915 If the location descriptor is missing, new_symbol will create
8916 a LOC_UNRESOLVED symbol, the address of the variable will then
8917 be determined from the minimal symbol table whenever the variable
8919 The address for the partial symbol table entry is not
8920 used by GDB, but it comes in handy for debugging partial symbol
8923 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8924 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8925 built_actual_name
!= NULL
,
8926 VAR_DOMAIN
, LOC_STATIC
,
8927 SECT_OFF_TEXT (objfile
),
8928 psymbol_placement::GLOBAL
,
8929 addr
, cu
->language
, objfile
);
8933 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8935 /* Static Variable. Skip symbols whose value we cannot know (those
8936 without location descriptors or constant values). */
8937 if (!has_loc
&& !pdi
->has_const_value
)
8939 xfree (built_actual_name
);
8943 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8944 built_actual_name
!= NULL
,
8945 VAR_DOMAIN
, LOC_STATIC
,
8946 SECT_OFF_TEXT (objfile
),
8947 psymbol_placement::STATIC
,
8949 cu
->language
, objfile
);
8952 case DW_TAG_typedef
:
8953 case DW_TAG_base_type
:
8954 case DW_TAG_subrange_type
:
8955 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8956 built_actual_name
!= NULL
,
8957 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8958 psymbol_placement::STATIC
,
8959 0, cu
->language
, objfile
);
8961 case DW_TAG_imported_declaration
:
8962 case DW_TAG_namespace
:
8963 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8964 built_actual_name
!= NULL
,
8965 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8966 psymbol_placement::GLOBAL
,
8967 0, cu
->language
, objfile
);
8970 /* With Fortran 77 there might be a "BLOCK DATA" module
8971 available without any name. If so, we skip the module as it
8972 doesn't bring any value. */
8973 if (actual_name
!= nullptr)
8974 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8975 built_actual_name
!= NULL
,
8976 MODULE_DOMAIN
, LOC_TYPEDEF
, -1,
8977 psymbol_placement::GLOBAL
,
8978 0, cu
->language
, objfile
);
8980 case DW_TAG_class_type
:
8981 case DW_TAG_interface_type
:
8982 case DW_TAG_structure_type
:
8983 case DW_TAG_union_type
:
8984 case DW_TAG_enumeration_type
:
8985 /* Skip external references. The DWARF standard says in the section
8986 about "Structure, Union, and Class Type Entries": "An incomplete
8987 structure, union or class type is represented by a structure,
8988 union or class entry that does not have a byte size attribute
8989 and that has a DW_AT_declaration attribute." */
8990 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8992 xfree (built_actual_name
);
8996 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8997 static vs. global. */
8998 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8999 built_actual_name
!= NULL
,
9000 STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
9001 cu
->language
== language_cplus
9002 ? psymbol_placement::GLOBAL
9003 : psymbol_placement::STATIC
,
9004 0, cu
->language
, objfile
);
9007 case DW_TAG_enumerator
:
9008 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9009 built_actual_name
!= NULL
,
9010 VAR_DOMAIN
, LOC_CONST
, -1,
9011 cu
->language
== language_cplus
9012 ? psymbol_placement::GLOBAL
9013 : psymbol_placement::STATIC
,
9014 0, cu
->language
, objfile
);
9020 xfree (built_actual_name
);
9023 /* Read a partial die corresponding to a namespace; also, add a symbol
9024 corresponding to that namespace to the symbol table. NAMESPACE is
9025 the name of the enclosing namespace. */
9028 add_partial_namespace (struct partial_die_info
*pdi
,
9029 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9030 int set_addrmap
, struct dwarf2_cu
*cu
)
9032 /* Add a symbol for the namespace. */
9034 add_partial_symbol (pdi
, cu
);
9036 /* Now scan partial symbols in that namespace. */
9038 if (pdi
->has_children
)
9039 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9042 /* Read a partial die corresponding to a Fortran module. */
9045 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
9046 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
9048 /* Add a symbol for the namespace. */
9050 add_partial_symbol (pdi
, cu
);
9052 /* Now scan partial symbols in that module. */
9054 if (pdi
->has_children
)
9055 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9058 /* Read a partial die corresponding to a subprogram or an inlined
9059 subprogram and create a partial symbol for that subprogram.
9060 When the CU language allows it, this routine also defines a partial
9061 symbol for each nested subprogram that this subprogram contains.
9062 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9063 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9065 PDI may also be a lexical block, in which case we simply search
9066 recursively for subprograms defined inside that lexical block.
9067 Again, this is only performed when the CU language allows this
9068 type of definitions. */
9071 add_partial_subprogram (struct partial_die_info
*pdi
,
9072 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9073 int set_addrmap
, struct dwarf2_cu
*cu
)
9075 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9077 if (pdi
->has_pc_info
)
9079 if (pdi
->lowpc
< *lowpc
)
9080 *lowpc
= pdi
->lowpc
;
9081 if (pdi
->highpc
> *highpc
)
9082 *highpc
= pdi
->highpc
;
9085 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9086 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9088 CORE_ADDR this_highpc
;
9089 CORE_ADDR this_lowpc
;
9091 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9092 SECT_OFF_TEXT (objfile
));
9094 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
9095 pdi
->lowpc
+ baseaddr
)
9098 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
9099 pdi
->highpc
+ baseaddr
)
9101 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
9102 this_lowpc
, this_highpc
- 1,
9103 cu
->per_cu
->v
.psymtab
);
9107 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9109 if (!pdi
->is_declaration
)
9110 /* Ignore subprogram DIEs that do not have a name, they are
9111 illegal. Do not emit a complaint at this point, we will
9112 do so when we convert this psymtab into a symtab. */
9114 add_partial_symbol (pdi
, cu
);
9118 if (! pdi
->has_children
)
9121 if (cu
->language
== language_ada
)
9123 pdi
= pdi
->die_child
;
9127 if (pdi
->tag
== DW_TAG_subprogram
9128 || pdi
->tag
== DW_TAG_inlined_subroutine
9129 || pdi
->tag
== DW_TAG_lexical_block
)
9130 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9131 pdi
= pdi
->die_sibling
;
9136 /* Read a partial die corresponding to an enumeration type. */
9139 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9140 struct dwarf2_cu
*cu
)
9142 struct partial_die_info
*pdi
;
9144 if (enum_pdi
->name
!= NULL
)
9145 add_partial_symbol (enum_pdi
, cu
);
9147 pdi
= enum_pdi
->die_child
;
9150 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9151 complaint (_("malformed enumerator DIE ignored"));
9153 add_partial_symbol (pdi
, cu
);
9154 pdi
= pdi
->die_sibling
;
9158 /* Return the initial uleb128 in the die at INFO_PTR. */
9161 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9163 unsigned int bytes_read
;
9165 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9168 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9169 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9171 Return the corresponding abbrev, or NULL if the number is zero (indicating
9172 an empty DIE). In either case *BYTES_READ will be set to the length of
9173 the initial number. */
9175 static struct abbrev_info
*
9176 peek_die_abbrev (const die_reader_specs
&reader
,
9177 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9179 dwarf2_cu
*cu
= reader
.cu
;
9180 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9181 unsigned int abbrev_number
9182 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9184 if (abbrev_number
== 0)
9187 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9190 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9191 " at offset %s [in module %s]"),
9192 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9193 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9199 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9200 Returns a pointer to the end of a series of DIEs, terminated by an empty
9201 DIE. Any children of the skipped DIEs will also be skipped. */
9203 static const gdb_byte
*
9204 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9208 unsigned int bytes_read
;
9209 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9212 return info_ptr
+ bytes_read
;
9214 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9218 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9219 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9220 abbrev corresponding to that skipped uleb128 should be passed in
9221 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9224 static const gdb_byte
*
9225 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9226 struct abbrev_info
*abbrev
)
9228 unsigned int bytes_read
;
9229 struct attribute attr
;
9230 bfd
*abfd
= reader
->abfd
;
9231 struct dwarf2_cu
*cu
= reader
->cu
;
9232 const gdb_byte
*buffer
= reader
->buffer
;
9233 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9234 unsigned int form
, i
;
9236 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9238 /* The only abbrev we care about is DW_AT_sibling. */
9239 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9241 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9242 if (attr
.form
== DW_FORM_ref_addr
)
9243 complaint (_("ignoring absolute DW_AT_sibling"));
9246 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9247 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9249 if (sibling_ptr
< info_ptr
)
9250 complaint (_("DW_AT_sibling points backwards"));
9251 else if (sibling_ptr
> reader
->buffer_end
)
9252 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9258 /* If it isn't DW_AT_sibling, skip this attribute. */
9259 form
= abbrev
->attrs
[i
].form
;
9263 case DW_FORM_ref_addr
:
9264 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9265 and later it is offset sized. */
9266 if (cu
->header
.version
== 2)
9267 info_ptr
+= cu
->header
.addr_size
;
9269 info_ptr
+= cu
->header
.offset_size
;
9271 case DW_FORM_GNU_ref_alt
:
9272 info_ptr
+= cu
->header
.offset_size
;
9275 info_ptr
+= cu
->header
.addr_size
;
9282 case DW_FORM_flag_present
:
9283 case DW_FORM_implicit_const
:
9295 case DW_FORM_ref_sig8
:
9298 case DW_FORM_data16
:
9301 case DW_FORM_string
:
9302 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9303 info_ptr
+= bytes_read
;
9305 case DW_FORM_sec_offset
:
9307 case DW_FORM_GNU_strp_alt
:
9308 info_ptr
+= cu
->header
.offset_size
;
9310 case DW_FORM_exprloc
:
9312 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9313 info_ptr
+= bytes_read
;
9315 case DW_FORM_block1
:
9316 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9318 case DW_FORM_block2
:
9319 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9321 case DW_FORM_block4
:
9322 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9328 case DW_FORM_ref_udata
:
9329 case DW_FORM_GNU_addr_index
:
9330 case DW_FORM_GNU_str_index
:
9331 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9333 case DW_FORM_indirect
:
9334 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9335 info_ptr
+= bytes_read
;
9336 /* We need to continue parsing from here, so just go back to
9338 goto skip_attribute
;
9341 error (_("Dwarf Error: Cannot handle %s "
9342 "in DWARF reader [in module %s]"),
9343 dwarf_form_name (form
),
9344 bfd_get_filename (abfd
));
9348 if (abbrev
->has_children
)
9349 return skip_children (reader
, info_ptr
);
9354 /* Locate ORIG_PDI's sibling.
9355 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9357 static const gdb_byte
*
9358 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9359 struct partial_die_info
*orig_pdi
,
9360 const gdb_byte
*info_ptr
)
9362 /* Do we know the sibling already? */
9364 if (orig_pdi
->sibling
)
9365 return orig_pdi
->sibling
;
9367 /* Are there any children to deal with? */
9369 if (!orig_pdi
->has_children
)
9372 /* Skip the children the long way. */
9374 return skip_children (reader
, info_ptr
);
9377 /* Expand this partial symbol table into a full symbol table. SELF is
9381 dwarf2_read_symtab (struct partial_symtab
*self
,
9382 struct objfile
*objfile
)
9384 struct dwarf2_per_objfile
*dwarf2_per_objfile
9385 = get_dwarf2_per_objfile (objfile
);
9389 warning (_("bug: psymtab for %s is already read in."),
9396 printf_filtered (_("Reading in symbols for %s..."),
9398 gdb_flush (gdb_stdout
);
9401 /* If this psymtab is constructed from a debug-only objfile, the
9402 has_section_at_zero flag will not necessarily be correct. We
9403 can get the correct value for this flag by looking at the data
9404 associated with the (presumably stripped) associated objfile. */
9405 if (objfile
->separate_debug_objfile_backlink
)
9407 struct dwarf2_per_objfile
*dpo_backlink
9408 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9410 dwarf2_per_objfile
->has_section_at_zero
9411 = dpo_backlink
->has_section_at_zero
;
9414 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9416 psymtab_to_symtab_1 (self
);
9418 /* Finish up the debug error message. */
9420 printf_filtered (_("done.\n"));
9423 process_cu_includes (dwarf2_per_objfile
);
9426 /* Reading in full CUs. */
9428 /* Add PER_CU to the queue. */
9431 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9432 enum language pretend_language
)
9434 struct dwarf2_queue_item
*item
;
9437 item
= XNEW (struct dwarf2_queue_item
);
9438 item
->per_cu
= per_cu
;
9439 item
->pretend_language
= pretend_language
;
9442 if (dwarf2_queue
== NULL
)
9443 dwarf2_queue
= item
;
9445 dwarf2_queue_tail
->next
= item
;
9447 dwarf2_queue_tail
= item
;
9450 /* If PER_CU is not yet queued, add it to the queue.
9451 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9453 The result is non-zero if PER_CU was queued, otherwise the result is zero
9454 meaning either PER_CU is already queued or it is already loaded.
9456 N.B. There is an invariant here that if a CU is queued then it is loaded.
9457 The caller is required to load PER_CU if we return non-zero. */
9460 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9461 struct dwarf2_per_cu_data
*per_cu
,
9462 enum language pretend_language
)
9464 /* We may arrive here during partial symbol reading, if we need full
9465 DIEs to process an unusual case (e.g. template arguments). Do
9466 not queue PER_CU, just tell our caller to load its DIEs. */
9467 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9469 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9474 /* Mark the dependence relation so that we don't flush PER_CU
9476 if (dependent_cu
!= NULL
)
9477 dwarf2_add_dependence (dependent_cu
, per_cu
);
9479 /* If it's already on the queue, we have nothing to do. */
9483 /* If the compilation unit is already loaded, just mark it as
9485 if (per_cu
->cu
!= NULL
)
9487 per_cu
->cu
->last_used
= 0;
9491 /* Add it to the queue. */
9492 queue_comp_unit (per_cu
, pretend_language
);
9497 /* Process the queue. */
9500 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9502 struct dwarf2_queue_item
*item
, *next_item
;
9504 if (dwarf_read_debug
)
9506 fprintf_unfiltered (gdb_stdlog
,
9507 "Expanding one or more symtabs of objfile %s ...\n",
9508 objfile_name (dwarf2_per_objfile
->objfile
));
9511 /* The queue starts out with one item, but following a DIE reference
9512 may load a new CU, adding it to the end of the queue. */
9513 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9515 if ((dwarf2_per_objfile
->using_index
9516 ? !item
->per_cu
->v
.quick
->compunit_symtab
9517 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9518 /* Skip dummy CUs. */
9519 && item
->per_cu
->cu
!= NULL
)
9521 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9522 unsigned int debug_print_threshold
;
9525 if (per_cu
->is_debug_types
)
9527 struct signatured_type
*sig_type
=
9528 (struct signatured_type
*) per_cu
;
9530 sprintf (buf
, "TU %s at offset %s",
9531 hex_string (sig_type
->signature
),
9532 sect_offset_str (per_cu
->sect_off
));
9533 /* There can be 100s of TUs.
9534 Only print them in verbose mode. */
9535 debug_print_threshold
= 2;
9539 sprintf (buf
, "CU at offset %s",
9540 sect_offset_str (per_cu
->sect_off
));
9541 debug_print_threshold
= 1;
9544 if (dwarf_read_debug
>= debug_print_threshold
)
9545 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9547 if (per_cu
->is_debug_types
)
9548 process_full_type_unit (per_cu
, item
->pretend_language
);
9550 process_full_comp_unit (per_cu
, item
->pretend_language
);
9552 if (dwarf_read_debug
>= debug_print_threshold
)
9553 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9556 item
->per_cu
->queued
= 0;
9557 next_item
= item
->next
;
9561 dwarf2_queue_tail
= NULL
;
9563 if (dwarf_read_debug
)
9565 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9566 objfile_name (dwarf2_per_objfile
->objfile
));
9570 /* Read in full symbols for PST, and anything it depends on. */
9573 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9575 struct dwarf2_per_cu_data
*per_cu
;
9581 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9582 if (!pst
->dependencies
[i
]->readin
9583 && pst
->dependencies
[i
]->user
== NULL
)
9585 /* Inform about additional files that need to be read in. */
9588 /* FIXME: i18n: Need to make this a single string. */
9589 fputs_filtered (" ", gdb_stdout
);
9591 fputs_filtered ("and ", gdb_stdout
);
9593 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9594 wrap_here (""); /* Flush output. */
9595 gdb_flush (gdb_stdout
);
9597 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9600 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9604 /* It's an include file, no symbols to read for it.
9605 Everything is in the parent symtab. */
9610 dw2_do_instantiate_symtab (per_cu
, false);
9613 /* Trivial hash function for die_info: the hash value of a DIE
9614 is its offset in .debug_info for this objfile. */
9617 die_hash (const void *item
)
9619 const struct die_info
*die
= (const struct die_info
*) item
;
9621 return to_underlying (die
->sect_off
);
9624 /* Trivial comparison function for die_info structures: two DIEs
9625 are equal if they have the same offset. */
9628 die_eq (const void *item_lhs
, const void *item_rhs
)
9630 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9631 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9633 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9636 /* die_reader_func for load_full_comp_unit.
9637 This is identical to read_signatured_type_reader,
9638 but is kept separate for now. */
9641 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9642 const gdb_byte
*info_ptr
,
9643 struct die_info
*comp_unit_die
,
9647 struct dwarf2_cu
*cu
= reader
->cu
;
9648 enum language
*language_ptr
= (enum language
*) data
;
9650 gdb_assert (cu
->die_hash
== NULL
);
9652 htab_create_alloc_ex (cu
->header
.length
/ 12,
9656 &cu
->comp_unit_obstack
,
9657 hashtab_obstack_allocate
,
9658 dummy_obstack_deallocate
);
9661 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9662 &info_ptr
, comp_unit_die
);
9663 cu
->dies
= comp_unit_die
;
9664 /* comp_unit_die is not stored in die_hash, no need. */
9666 /* We try not to read any attributes in this function, because not
9667 all CUs needed for references have been loaded yet, and symbol
9668 table processing isn't initialized. But we have to set the CU language,
9669 or we won't be able to build types correctly.
9670 Similarly, if we do not read the producer, we can not apply
9671 producer-specific interpretation. */
9672 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9675 /* Load the DIEs associated with PER_CU into memory. */
9678 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9680 enum language pretend_language
)
9682 gdb_assert (! this_cu
->is_debug_types
);
9684 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, skip_partial
,
9685 load_full_comp_unit_reader
, &pretend_language
);
9688 /* Add a DIE to the delayed physname list. */
9691 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9692 const char *name
, struct die_info
*die
,
9693 struct dwarf2_cu
*cu
)
9695 struct delayed_method_info mi
;
9697 mi
.fnfield_index
= fnfield_index
;
9701 cu
->method_list
.push_back (mi
);
9704 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9705 "const" / "volatile". If so, decrements LEN by the length of the
9706 modifier and return true. Otherwise return false. */
9710 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9712 size_t mod_len
= sizeof (mod
) - 1;
9713 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9721 /* Compute the physnames of any methods on the CU's method list.
9723 The computation of method physnames is delayed in order to avoid the
9724 (bad) condition that one of the method's formal parameters is of an as yet
9728 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9730 /* Only C++ delays computing physnames. */
9731 if (cu
->method_list
.empty ())
9733 gdb_assert (cu
->language
== language_cplus
);
9735 for (const delayed_method_info
&mi
: cu
->method_list
)
9737 const char *physname
;
9738 struct fn_fieldlist
*fn_flp
9739 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9740 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9741 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9742 = physname
? physname
: "";
9744 /* Since there's no tag to indicate whether a method is a
9745 const/volatile overload, extract that information out of the
9747 if (physname
!= NULL
)
9749 size_t len
= strlen (physname
);
9753 if (physname
[len
] == ')') /* shortcut */
9755 else if (check_modifier (physname
, len
, " const"))
9756 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9757 else if (check_modifier (physname
, len
, " volatile"))
9758 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9765 /* The list is no longer needed. */
9766 cu
->method_list
.clear ();
9769 /* Go objects should be embedded in a DW_TAG_module DIE,
9770 and it's not clear if/how imported objects will appear.
9771 To keep Go support simple until that's worked out,
9772 go back through what we've read and create something usable.
9773 We could do this while processing each DIE, and feels kinda cleaner,
9774 but that way is more invasive.
9775 This is to, for example, allow the user to type "p var" or "b main"
9776 without having to specify the package name, and allow lookups
9777 of module.object to work in contexts that use the expression
9781 fixup_go_packaging (struct dwarf2_cu
*cu
)
9783 char *package_name
= NULL
;
9784 struct pending
*list
;
9787 for (list
= *cu
->get_builder ()->get_global_symbols ();
9791 for (i
= 0; i
< list
->nsyms
; ++i
)
9793 struct symbol
*sym
= list
->symbol
[i
];
9795 if (SYMBOL_LANGUAGE (sym
) == language_go
9796 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9798 char *this_package_name
= go_symbol_package_name (sym
);
9800 if (this_package_name
== NULL
)
9802 if (package_name
== NULL
)
9803 package_name
= this_package_name
;
9806 struct objfile
*objfile
9807 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9808 if (strcmp (package_name
, this_package_name
) != 0)
9809 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9810 (symbol_symtab (sym
) != NULL
9811 ? symtab_to_filename_for_display
9812 (symbol_symtab (sym
))
9813 : objfile_name (objfile
)),
9814 this_package_name
, package_name
);
9815 xfree (this_package_name
);
9821 if (package_name
!= NULL
)
9823 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9824 const char *saved_package_name
9825 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9827 strlen (package_name
));
9828 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9829 saved_package_name
);
9832 sym
= allocate_symbol (objfile
);
9833 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9834 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9835 strlen (saved_package_name
), 0, objfile
);
9836 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9837 e.g., "main" finds the "main" module and not C's main(). */
9838 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9839 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9840 SYMBOL_TYPE (sym
) = type
;
9842 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9844 xfree (package_name
);
9848 /* Allocate a fully-qualified name consisting of the two parts on the
9852 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9854 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9857 /* A helper that allocates a struct discriminant_info to attach to a
9860 static struct discriminant_info
*
9861 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9864 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9865 gdb_assert (discriminant_index
== -1
9866 || (discriminant_index
>= 0
9867 && discriminant_index
< TYPE_NFIELDS (type
)));
9868 gdb_assert (default_index
== -1
9869 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9871 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9873 struct discriminant_info
*disc
9874 = ((struct discriminant_info
*)
9876 offsetof (struct discriminant_info
, discriminants
)
9877 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9878 disc
->default_index
= default_index
;
9879 disc
->discriminant_index
= discriminant_index
;
9881 struct dynamic_prop prop
;
9882 prop
.kind
= PROP_UNDEFINED
;
9883 prop
.data
.baton
= disc
;
9885 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9890 /* Some versions of rustc emitted enums in an unusual way.
9892 Ordinary enums were emitted as unions. The first element of each
9893 structure in the union was named "RUST$ENUM$DISR". This element
9894 held the discriminant.
9896 These versions of Rust also implemented the "non-zero"
9897 optimization. When the enum had two values, and one is empty and
9898 the other holds a pointer that cannot be zero, the pointer is used
9899 as the discriminant, with a zero value meaning the empty variant.
9900 Here, the union's first member is of the form
9901 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9902 where the fieldnos are the indices of the fields that should be
9903 traversed in order to find the field (which may be several fields deep)
9904 and the variantname is the name of the variant of the case when the
9907 This function recognizes whether TYPE is of one of these forms,
9908 and, if so, smashes it to be a variant type. */
9911 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9913 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9915 /* We don't need to deal with empty enums. */
9916 if (TYPE_NFIELDS (type
) == 0)
9919 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9920 if (TYPE_NFIELDS (type
) == 1
9921 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9923 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9925 /* Decode the field name to find the offset of the
9927 ULONGEST bit_offset
= 0;
9928 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9929 while (name
[0] >= '0' && name
[0] <= '9')
9932 unsigned long index
= strtoul (name
, &tail
, 10);
9935 || index
>= TYPE_NFIELDS (field_type
)
9936 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9937 != FIELD_LOC_KIND_BITPOS
))
9939 complaint (_("Could not parse Rust enum encoding string \"%s\""
9941 TYPE_FIELD_NAME (type
, 0),
9942 objfile_name (objfile
));
9947 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9948 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9951 /* Make a union to hold the variants. */
9952 struct type
*union_type
= alloc_type (objfile
);
9953 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9954 TYPE_NFIELDS (union_type
) = 3;
9955 TYPE_FIELDS (union_type
)
9956 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9957 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9958 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9960 /* Put the discriminant must at index 0. */
9961 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
9962 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9963 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9964 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
9966 /* The order of fields doesn't really matter, so put the real
9967 field at index 1 and the data-less field at index 2. */
9968 struct discriminant_info
*disc
9969 = alloc_discriminant_info (union_type
, 0, 1);
9970 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
9971 TYPE_FIELD_NAME (union_type
, 1)
9972 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
9973 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
9974 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9975 TYPE_FIELD_NAME (union_type
, 1));
9977 const char *dataless_name
9978 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9980 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9982 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
9983 /* NAME points into the original discriminant name, which
9984 already has the correct lifetime. */
9985 TYPE_FIELD_NAME (union_type
, 2) = name
;
9986 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
9987 disc
->discriminants
[2] = 0;
9989 /* Smash this type to be a structure type. We have to do this
9990 because the type has already been recorded. */
9991 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9992 TYPE_NFIELDS (type
) = 1;
9994 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
9996 /* Install the variant part. */
9997 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9998 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9999 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10001 else if (TYPE_NFIELDS (type
) == 1)
10003 /* We assume that a union with a single field is a univariant
10005 /* Smash this type to be a structure type. We have to do this
10006 because the type has already been recorded. */
10007 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10009 /* Make a union to hold the variants. */
10010 struct type
*union_type
= alloc_type (objfile
);
10011 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10012 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
10013 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10014 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10015 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
10017 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
10018 const char *variant_name
10019 = rust_last_path_segment (TYPE_NAME (field_type
));
10020 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
10021 TYPE_NAME (field_type
)
10022 = rust_fully_qualify (&objfile
->objfile_obstack
,
10023 TYPE_NAME (type
), variant_name
);
10025 /* Install the union in the outer struct type. */
10026 TYPE_NFIELDS (type
) = 1;
10028 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
10029 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10030 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10031 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10033 alloc_discriminant_info (union_type
, -1, 0);
10037 struct type
*disr_type
= nullptr;
10038 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
10040 disr_type
= TYPE_FIELD_TYPE (type
, i
);
10042 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
10044 /* All fields of a true enum will be structs. */
10047 else if (TYPE_NFIELDS (disr_type
) == 0)
10049 /* Could be data-less variant, so keep going. */
10050 disr_type
= nullptr;
10052 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
10053 "RUST$ENUM$DISR") != 0)
10055 /* Not a Rust enum. */
10065 /* If we got here without a discriminant, then it's probably
10067 if (disr_type
== nullptr)
10070 /* Smash this type to be a structure type. We have to do this
10071 because the type has already been recorded. */
10072 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10074 /* Make a union to hold the variants. */
10075 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10076 struct type
*union_type
= alloc_type (objfile
);
10077 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10078 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10079 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10080 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10081 TYPE_FIELDS (union_type
)
10082 = (struct field
*) TYPE_ZALLOC (union_type
,
10083 (TYPE_NFIELDS (union_type
)
10084 * sizeof (struct field
)));
10086 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10087 TYPE_NFIELDS (type
) * sizeof (struct field
));
10089 /* Install the discriminant at index 0 in the union. */
10090 TYPE_FIELD (union_type
, 0) = *disr_field
;
10091 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10092 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10094 /* Install the union in the outer struct type. */
10095 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10096 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10097 TYPE_NFIELDS (type
) = 1;
10099 /* Set the size and offset of the union type. */
10100 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10102 /* We need a way to find the correct discriminant given a
10103 variant name. For convenience we build a map here. */
10104 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10105 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10106 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10108 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10111 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10112 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10116 int n_fields
= TYPE_NFIELDS (union_type
);
10117 struct discriminant_info
*disc
10118 = alloc_discriminant_info (union_type
, 0, -1);
10119 /* Skip the discriminant here. */
10120 for (int i
= 1; i
< n_fields
; ++i
)
10122 /* Find the final word in the name of this variant's type.
10123 That name can be used to look up the correct
10125 const char *variant_name
10126 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10129 auto iter
= discriminant_map
.find (variant_name
);
10130 if (iter
!= discriminant_map
.end ())
10131 disc
->discriminants
[i
] = iter
->second
;
10133 /* Remove the discriminant field, if it exists. */
10134 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10135 if (TYPE_NFIELDS (sub_type
) > 0)
10137 --TYPE_NFIELDS (sub_type
);
10138 ++TYPE_FIELDS (sub_type
);
10140 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10141 TYPE_NAME (sub_type
)
10142 = rust_fully_qualify (&objfile
->objfile_obstack
,
10143 TYPE_NAME (type
), variant_name
);
10148 /* Rewrite some Rust unions to be structures with variants parts. */
10151 rust_union_quirks (struct dwarf2_cu
*cu
)
10153 gdb_assert (cu
->language
== language_rust
);
10154 for (type
*type_
: cu
->rust_unions
)
10155 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10156 /* We don't need this any more. */
10157 cu
->rust_unions
.clear ();
10160 /* Return the symtab for PER_CU. This works properly regardless of
10161 whether we're using the index or psymtabs. */
10163 static struct compunit_symtab
*
10164 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10166 return (per_cu
->dwarf2_per_objfile
->using_index
10167 ? per_cu
->v
.quick
->compunit_symtab
10168 : per_cu
->v
.psymtab
->compunit_symtab
);
10171 /* A helper function for computing the list of all symbol tables
10172 included by PER_CU. */
10175 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
10176 htab_t all_children
, htab_t all_type_symtabs
,
10177 struct dwarf2_per_cu_data
*per_cu
,
10178 struct compunit_symtab
*immediate_parent
)
10182 struct compunit_symtab
*cust
;
10183 struct dwarf2_per_cu_data
*iter
;
10185 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10188 /* This inclusion and its children have been processed. */
10193 /* Only add a CU if it has a symbol table. */
10194 cust
= get_compunit_symtab (per_cu
);
10197 /* If this is a type unit only add its symbol table if we haven't
10198 seen it yet (type unit per_cu's can share symtabs). */
10199 if (per_cu
->is_debug_types
)
10201 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10205 result
->push_back (cust
);
10206 if (cust
->user
== NULL
)
10207 cust
->user
= immediate_parent
;
10212 result
->push_back (cust
);
10213 if (cust
->user
== NULL
)
10214 cust
->user
= immediate_parent
;
10219 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10222 recursively_compute_inclusions (result
, all_children
,
10223 all_type_symtabs
, iter
, cust
);
10227 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10231 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10233 gdb_assert (! per_cu
->is_debug_types
);
10235 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10238 struct dwarf2_per_cu_data
*per_cu_iter
;
10239 std::vector
<compunit_symtab
*> result_symtabs
;
10240 htab_t all_children
, all_type_symtabs
;
10241 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10243 /* If we don't have a symtab, we can just skip this case. */
10247 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10248 NULL
, xcalloc
, xfree
);
10249 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10250 NULL
, xcalloc
, xfree
);
10253 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10257 recursively_compute_inclusions (&result_symtabs
, all_children
,
10258 all_type_symtabs
, per_cu_iter
,
10262 /* Now we have a transitive closure of all the included symtabs. */
10263 len
= result_symtabs
.size ();
10265 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10266 struct compunit_symtab
*, len
+ 1);
10267 memcpy (cust
->includes
, result_symtabs
.data (),
10268 len
* sizeof (compunit_symtab
*));
10269 cust
->includes
[len
] = NULL
;
10271 htab_delete (all_children
);
10272 htab_delete (all_type_symtabs
);
10276 /* Compute the 'includes' field for the symtabs of all the CUs we just
10280 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10282 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
10284 if (! iter
->is_debug_types
)
10285 compute_compunit_symtab_includes (iter
);
10288 dwarf2_per_objfile
->just_read_cus
.clear ();
10291 /* Generate full symbol information for PER_CU, whose DIEs have
10292 already been loaded into memory. */
10295 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10296 enum language pretend_language
)
10298 struct dwarf2_cu
*cu
= per_cu
->cu
;
10299 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10300 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10301 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10302 CORE_ADDR lowpc
, highpc
;
10303 struct compunit_symtab
*cust
;
10304 CORE_ADDR baseaddr
;
10305 struct block
*static_block
;
10308 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10310 /* Clear the list here in case something was left over. */
10311 cu
->method_list
.clear ();
10313 cu
->language
= pretend_language
;
10314 cu
->language_defn
= language_def (cu
->language
);
10316 /* Do line number decoding in read_file_scope () */
10317 process_die (cu
->dies
, cu
);
10319 /* For now fudge the Go package. */
10320 if (cu
->language
== language_go
)
10321 fixup_go_packaging (cu
);
10323 /* Now that we have processed all the DIEs in the CU, all the types
10324 should be complete, and it should now be safe to compute all of the
10326 compute_delayed_physnames (cu
);
10328 if (cu
->language
== language_rust
)
10329 rust_union_quirks (cu
);
10331 /* Some compilers don't define a DW_AT_high_pc attribute for the
10332 compilation unit. If the DW_AT_high_pc is missing, synthesize
10333 it, by scanning the DIE's below the compilation unit. */
10334 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10336 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10337 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
10339 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10340 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10341 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10342 addrmap to help ensure it has an accurate map of pc values belonging to
10344 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10346 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
10347 SECT_OFF_TEXT (objfile
),
10352 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10354 /* Set symtab language to language from DW_AT_language. If the
10355 compilation is from a C file generated by language preprocessors, do
10356 not set the language if it was already deduced by start_subfile. */
10357 if (!(cu
->language
== language_c
10358 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10359 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10361 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10362 produce DW_AT_location with location lists but it can be possibly
10363 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10364 there were bugs in prologue debug info, fixed later in GCC-4.5
10365 by "unwind info for epilogues" patch (which is not directly related).
10367 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10368 needed, it would be wrong due to missing DW_AT_producer there.
10370 Still one can confuse GDB by using non-standard GCC compilation
10371 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10373 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10374 cust
->locations_valid
= 1;
10376 if (gcc_4_minor
>= 5)
10377 cust
->epilogue_unwind_valid
= 1;
10379 cust
->call_site_htab
= cu
->call_site_htab
;
10382 if (dwarf2_per_objfile
->using_index
)
10383 per_cu
->v
.quick
->compunit_symtab
= cust
;
10386 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10387 pst
->compunit_symtab
= cust
;
10391 /* Push it for inclusion processing later. */
10392 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
10394 /* Not needed any more. */
10395 cu
->reset_builder ();
10398 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10399 already been loaded into memory. */
10402 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10403 enum language pretend_language
)
10405 struct dwarf2_cu
*cu
= per_cu
->cu
;
10406 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10407 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10408 struct compunit_symtab
*cust
;
10409 struct signatured_type
*sig_type
;
10411 gdb_assert (per_cu
->is_debug_types
);
10412 sig_type
= (struct signatured_type
*) per_cu
;
10414 /* Clear the list here in case something was left over. */
10415 cu
->method_list
.clear ();
10417 cu
->language
= pretend_language
;
10418 cu
->language_defn
= language_def (cu
->language
);
10420 /* The symbol tables are set up in read_type_unit_scope. */
10421 process_die (cu
->dies
, cu
);
10423 /* For now fudge the Go package. */
10424 if (cu
->language
== language_go
)
10425 fixup_go_packaging (cu
);
10427 /* Now that we have processed all the DIEs in the CU, all the types
10428 should be complete, and it should now be safe to compute all of the
10430 compute_delayed_physnames (cu
);
10432 if (cu
->language
== language_rust
)
10433 rust_union_quirks (cu
);
10435 /* TUs share symbol tables.
10436 If this is the first TU to use this symtab, complete the construction
10437 of it with end_expandable_symtab. Otherwise, complete the addition of
10438 this TU's symbols to the existing symtab. */
10439 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10441 buildsym_compunit
*builder
= cu
->get_builder ();
10442 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10443 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10447 /* Set symtab language to language from DW_AT_language. If the
10448 compilation is from a C file generated by language preprocessors,
10449 do not set the language if it was already deduced by
10451 if (!(cu
->language
== language_c
10452 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10453 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10458 cu
->get_builder ()->augment_type_symtab ();
10459 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10462 if (dwarf2_per_objfile
->using_index
)
10463 per_cu
->v
.quick
->compunit_symtab
= cust
;
10466 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10467 pst
->compunit_symtab
= cust
;
10471 /* Not needed any more. */
10472 cu
->reset_builder ();
10475 /* Process an imported unit DIE. */
10478 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10480 struct attribute
*attr
;
10482 /* For now we don't handle imported units in type units. */
10483 if (cu
->per_cu
->is_debug_types
)
10485 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10486 " supported in type units [in module %s]"),
10487 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10490 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10493 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10494 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10495 dwarf2_per_cu_data
*per_cu
10496 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10497 cu
->per_cu
->dwarf2_per_objfile
);
10499 /* If necessary, add it to the queue and load its DIEs. */
10500 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10501 load_full_comp_unit (per_cu
, false, cu
->language
);
10503 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10508 /* RAII object that represents a process_die scope: i.e.,
10509 starts/finishes processing a DIE. */
10510 class process_die_scope
10513 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10514 : m_die (die
), m_cu (cu
)
10516 /* We should only be processing DIEs not already in process. */
10517 gdb_assert (!m_die
->in_process
);
10518 m_die
->in_process
= true;
10521 ~process_die_scope ()
10523 m_die
->in_process
= false;
10525 /* If we're done processing the DIE for the CU that owns the line
10526 header, we don't need the line header anymore. */
10527 if (m_cu
->line_header_die_owner
== m_die
)
10529 delete m_cu
->line_header
;
10530 m_cu
->line_header
= NULL
;
10531 m_cu
->line_header_die_owner
= NULL
;
10540 /* Process a die and its children. */
10543 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10545 process_die_scope
scope (die
, cu
);
10549 case DW_TAG_padding
:
10551 case DW_TAG_compile_unit
:
10552 case DW_TAG_partial_unit
:
10553 read_file_scope (die
, cu
);
10555 case DW_TAG_type_unit
:
10556 read_type_unit_scope (die
, cu
);
10558 case DW_TAG_subprogram
:
10559 case DW_TAG_inlined_subroutine
:
10560 read_func_scope (die
, cu
);
10562 case DW_TAG_lexical_block
:
10563 case DW_TAG_try_block
:
10564 case DW_TAG_catch_block
:
10565 read_lexical_block_scope (die
, cu
);
10567 case DW_TAG_call_site
:
10568 case DW_TAG_GNU_call_site
:
10569 read_call_site_scope (die
, cu
);
10571 case DW_TAG_class_type
:
10572 case DW_TAG_interface_type
:
10573 case DW_TAG_structure_type
:
10574 case DW_TAG_union_type
:
10575 process_structure_scope (die
, cu
);
10577 case DW_TAG_enumeration_type
:
10578 process_enumeration_scope (die
, cu
);
10581 /* These dies have a type, but processing them does not create
10582 a symbol or recurse to process the children. Therefore we can
10583 read them on-demand through read_type_die. */
10584 case DW_TAG_subroutine_type
:
10585 case DW_TAG_set_type
:
10586 case DW_TAG_array_type
:
10587 case DW_TAG_pointer_type
:
10588 case DW_TAG_ptr_to_member_type
:
10589 case DW_TAG_reference_type
:
10590 case DW_TAG_rvalue_reference_type
:
10591 case DW_TAG_string_type
:
10594 case DW_TAG_base_type
:
10595 case DW_TAG_subrange_type
:
10596 case DW_TAG_typedef
:
10597 /* Add a typedef symbol for the type definition, if it has a
10599 new_symbol (die
, read_type_die (die
, cu
), cu
);
10601 case DW_TAG_common_block
:
10602 read_common_block (die
, cu
);
10604 case DW_TAG_common_inclusion
:
10606 case DW_TAG_namespace
:
10607 cu
->processing_has_namespace_info
= true;
10608 read_namespace (die
, cu
);
10610 case DW_TAG_module
:
10611 cu
->processing_has_namespace_info
= true;
10612 read_module (die
, cu
);
10614 case DW_TAG_imported_declaration
:
10615 cu
->processing_has_namespace_info
= true;
10616 if (read_namespace_alias (die
, cu
))
10618 /* The declaration is not a global namespace alias. */
10619 /* Fall through. */
10620 case DW_TAG_imported_module
:
10621 cu
->processing_has_namespace_info
= true;
10622 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10623 || cu
->language
!= language_fortran
))
10624 complaint (_("Tag '%s' has unexpected children"),
10625 dwarf_tag_name (die
->tag
));
10626 read_import_statement (die
, cu
);
10629 case DW_TAG_imported_unit
:
10630 process_imported_unit_die (die
, cu
);
10633 case DW_TAG_variable
:
10634 read_variable (die
, cu
);
10638 new_symbol (die
, NULL
, cu
);
10643 /* DWARF name computation. */
10645 /* A helper function for dwarf2_compute_name which determines whether DIE
10646 needs to have the name of the scope prepended to the name listed in the
10650 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10652 struct attribute
*attr
;
10656 case DW_TAG_namespace
:
10657 case DW_TAG_typedef
:
10658 case DW_TAG_class_type
:
10659 case DW_TAG_interface_type
:
10660 case DW_TAG_structure_type
:
10661 case DW_TAG_union_type
:
10662 case DW_TAG_enumeration_type
:
10663 case DW_TAG_enumerator
:
10664 case DW_TAG_subprogram
:
10665 case DW_TAG_inlined_subroutine
:
10666 case DW_TAG_member
:
10667 case DW_TAG_imported_declaration
:
10670 case DW_TAG_variable
:
10671 case DW_TAG_constant
:
10672 /* We only need to prefix "globally" visible variables. These include
10673 any variable marked with DW_AT_external or any variable that
10674 lives in a namespace. [Variables in anonymous namespaces
10675 require prefixing, but they are not DW_AT_external.] */
10677 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10679 struct dwarf2_cu
*spec_cu
= cu
;
10681 return die_needs_namespace (die_specification (die
, &spec_cu
),
10685 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10686 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10687 && die
->parent
->tag
!= DW_TAG_module
)
10689 /* A variable in a lexical block of some kind does not need a
10690 namespace, even though in C++ such variables may be external
10691 and have a mangled name. */
10692 if (die
->parent
->tag
== DW_TAG_lexical_block
10693 || die
->parent
->tag
== DW_TAG_try_block
10694 || die
->parent
->tag
== DW_TAG_catch_block
10695 || die
->parent
->tag
== DW_TAG_subprogram
)
10704 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10705 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10706 defined for the given DIE. */
10708 static struct attribute
*
10709 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10711 struct attribute
*attr
;
10713 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10715 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10720 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10721 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10722 defined for the given DIE. */
10724 static const char *
10725 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10727 const char *linkage_name
;
10729 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10730 if (linkage_name
== NULL
)
10731 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10733 return linkage_name
;
10736 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10737 compute the physname for the object, which include a method's:
10738 - formal parameters (C++),
10739 - receiver type (Go),
10741 The term "physname" is a bit confusing.
10742 For C++, for example, it is the demangled name.
10743 For Go, for example, it's the mangled name.
10745 For Ada, return the DIE's linkage name rather than the fully qualified
10746 name. PHYSNAME is ignored..
10748 The result is allocated on the objfile_obstack and canonicalized. */
10750 static const char *
10751 dwarf2_compute_name (const char *name
,
10752 struct die_info
*die
, struct dwarf2_cu
*cu
,
10755 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10758 name
= dwarf2_name (die
, cu
);
10760 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10761 but otherwise compute it by typename_concat inside GDB.
10762 FIXME: Actually this is not really true, or at least not always true.
10763 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10764 Fortran names because there is no mangling standard. So new_symbol
10765 will set the demangled name to the result of dwarf2_full_name, and it is
10766 the demangled name that GDB uses if it exists. */
10767 if (cu
->language
== language_ada
10768 || (cu
->language
== language_fortran
&& physname
))
10770 /* For Ada unit, we prefer the linkage name over the name, as
10771 the former contains the exported name, which the user expects
10772 to be able to reference. Ideally, we want the user to be able
10773 to reference this entity using either natural or linkage name,
10774 but we haven't started looking at this enhancement yet. */
10775 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10777 if (linkage_name
!= NULL
)
10778 return linkage_name
;
10781 /* These are the only languages we know how to qualify names in. */
10783 && (cu
->language
== language_cplus
10784 || cu
->language
== language_fortran
|| cu
->language
== language_d
10785 || cu
->language
== language_rust
))
10787 if (die_needs_namespace (die
, cu
))
10789 const char *prefix
;
10790 const char *canonical_name
= NULL
;
10794 prefix
= determine_prefix (die
, cu
);
10795 if (*prefix
!= '\0')
10797 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10800 buf
.puts (prefixed_name
);
10801 xfree (prefixed_name
);
10806 /* Template parameters may be specified in the DIE's DW_AT_name, or
10807 as children with DW_TAG_template_type_param or
10808 DW_TAG_value_type_param. If the latter, add them to the name
10809 here. If the name already has template parameters, then
10810 skip this step; some versions of GCC emit both, and
10811 it is more efficient to use the pre-computed name.
10813 Something to keep in mind about this process: it is very
10814 unlikely, or in some cases downright impossible, to produce
10815 something that will match the mangled name of a function.
10816 If the definition of the function has the same debug info,
10817 we should be able to match up with it anyway. But fallbacks
10818 using the minimal symbol, for instance to find a method
10819 implemented in a stripped copy of libstdc++, will not work.
10820 If we do not have debug info for the definition, we will have to
10821 match them up some other way.
10823 When we do name matching there is a related problem with function
10824 templates; two instantiated function templates are allowed to
10825 differ only by their return types, which we do not add here. */
10827 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10829 struct attribute
*attr
;
10830 struct die_info
*child
;
10833 die
->building_fullname
= 1;
10835 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10839 const gdb_byte
*bytes
;
10840 struct dwarf2_locexpr_baton
*baton
;
10843 if (child
->tag
!= DW_TAG_template_type_param
10844 && child
->tag
!= DW_TAG_template_value_param
)
10855 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10858 complaint (_("template parameter missing DW_AT_type"));
10859 buf
.puts ("UNKNOWN_TYPE");
10862 type
= die_type (child
, cu
);
10864 if (child
->tag
== DW_TAG_template_type_param
)
10866 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10867 &type_print_raw_options
);
10871 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10874 complaint (_("template parameter missing "
10875 "DW_AT_const_value"));
10876 buf
.puts ("UNKNOWN_VALUE");
10880 dwarf2_const_value_attr (attr
, type
, name
,
10881 &cu
->comp_unit_obstack
, cu
,
10882 &value
, &bytes
, &baton
);
10884 if (TYPE_NOSIGN (type
))
10885 /* GDB prints characters as NUMBER 'CHAR'. If that's
10886 changed, this can use value_print instead. */
10887 c_printchar (value
, type
, &buf
);
10890 struct value_print_options opts
;
10893 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10897 else if (bytes
!= NULL
)
10899 v
= allocate_value (type
);
10900 memcpy (value_contents_writeable (v
), bytes
,
10901 TYPE_LENGTH (type
));
10904 v
= value_from_longest (type
, value
);
10906 /* Specify decimal so that we do not depend on
10908 get_formatted_print_options (&opts
, 'd');
10910 value_print (v
, &buf
, &opts
);
10915 die
->building_fullname
= 0;
10919 /* Close the argument list, with a space if necessary
10920 (nested templates). */
10921 if (!buf
.empty () && buf
.string ().back () == '>')
10928 /* For C++ methods, append formal parameter type
10929 information, if PHYSNAME. */
10931 if (physname
&& die
->tag
== DW_TAG_subprogram
10932 && cu
->language
== language_cplus
)
10934 struct type
*type
= read_type_die (die
, cu
);
10936 c_type_print_args (type
, &buf
, 1, cu
->language
,
10937 &type_print_raw_options
);
10939 if (cu
->language
== language_cplus
)
10941 /* Assume that an artificial first parameter is
10942 "this", but do not crash if it is not. RealView
10943 marks unnamed (and thus unused) parameters as
10944 artificial; there is no way to differentiate
10946 if (TYPE_NFIELDS (type
) > 0
10947 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10948 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10949 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10951 buf
.puts (" const");
10955 const std::string
&intermediate_name
= buf
.string ();
10957 if (cu
->language
== language_cplus
)
10959 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10960 &objfile
->per_bfd
->storage_obstack
);
10962 /* If we only computed INTERMEDIATE_NAME, or if
10963 INTERMEDIATE_NAME is already canonical, then we need to
10964 copy it to the appropriate obstack. */
10965 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10966 name
= ((const char *)
10967 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
10968 intermediate_name
.c_str (),
10969 intermediate_name
.length ()));
10971 name
= canonical_name
;
10978 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10979 If scope qualifiers are appropriate they will be added. The result
10980 will be allocated on the storage_obstack, or NULL if the DIE does
10981 not have a name. NAME may either be from a previous call to
10982 dwarf2_name or NULL.
10984 The output string will be canonicalized (if C++). */
10986 static const char *
10987 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10989 return dwarf2_compute_name (name
, die
, cu
, 0);
10992 /* Construct a physname for the given DIE in CU. NAME may either be
10993 from a previous call to dwarf2_name or NULL. The result will be
10994 allocated on the objfile_objstack or NULL if the DIE does not have a
10997 The output string will be canonicalized (if C++). */
10999 static const char *
11000 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11002 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11003 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
11006 /* In this case dwarf2_compute_name is just a shortcut not building anything
11008 if (!die_needs_namespace (die
, cu
))
11009 return dwarf2_compute_name (name
, die
, cu
, 1);
11011 mangled
= dw2_linkage_name (die
, cu
);
11013 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
11014 See https://github.com/rust-lang/rust/issues/32925. */
11015 if (cu
->language
== language_rust
&& mangled
!= NULL
11016 && strchr (mangled
, '{') != NULL
)
11019 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
11021 gdb::unique_xmalloc_ptr
<char> demangled
;
11022 if (mangled
!= NULL
)
11025 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
11027 /* Do nothing (do not demangle the symbol name). */
11029 else if (cu
->language
== language_go
)
11031 /* This is a lie, but we already lie to the caller new_symbol.
11032 new_symbol assumes we return the mangled name.
11033 This just undoes that lie until things are cleaned up. */
11037 /* Use DMGL_RET_DROP for C++ template functions to suppress
11038 their return type. It is easier for GDB users to search
11039 for such functions as `name(params)' than `long name(params)'.
11040 In such case the minimal symbol names do not match the full
11041 symbol names but for template functions there is never a need
11042 to look up their definition from their declaration so
11043 the only disadvantage remains the minimal symbol variant
11044 `long name(params)' does not have the proper inferior type. */
11045 demangled
.reset (gdb_demangle (mangled
,
11046 (DMGL_PARAMS
| DMGL_ANSI
11047 | DMGL_RET_DROP
)));
11050 canon
= demangled
.get ();
11058 if (canon
== NULL
|| check_physname
)
11060 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11062 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11064 /* It may not mean a bug in GDB. The compiler could also
11065 compute DW_AT_linkage_name incorrectly. But in such case
11066 GDB would need to be bug-to-bug compatible. */
11068 complaint (_("Computed physname <%s> does not match demangled <%s> "
11069 "(from linkage <%s>) - DIE at %s [in module %s]"),
11070 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11071 objfile_name (objfile
));
11073 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11074 is available here - over computed PHYSNAME. It is safer
11075 against both buggy GDB and buggy compilers. */
11089 retval
= ((const char *)
11090 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11091 retval
, strlen (retval
)));
11096 /* Inspect DIE in CU for a namespace alias. If one exists, record
11097 a new symbol for it.
11099 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11102 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11104 struct attribute
*attr
;
11106 /* If the die does not have a name, this is not a namespace
11108 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11112 struct die_info
*d
= die
;
11113 struct dwarf2_cu
*imported_cu
= cu
;
11115 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11116 keep inspecting DIEs until we hit the underlying import. */
11117 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11118 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11120 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11124 d
= follow_die_ref (d
, attr
, &imported_cu
);
11125 if (d
->tag
!= DW_TAG_imported_declaration
)
11129 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11131 complaint (_("DIE at %s has too many recursively imported "
11132 "declarations"), sect_offset_str (d
->sect_off
));
11139 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11141 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11142 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11144 /* This declaration is a global namespace alias. Add
11145 a symbol for it whose type is the aliased namespace. */
11146 new_symbol (die
, type
, cu
);
11155 /* Return the using directives repository (global or local?) to use in the
11156 current context for CU.
11158 For Ada, imported declarations can materialize renamings, which *may* be
11159 global. However it is impossible (for now?) in DWARF to distinguish
11160 "external" imported declarations and "static" ones. As all imported
11161 declarations seem to be static in all other languages, make them all CU-wide
11162 global only in Ada. */
11164 static struct using_direct
**
11165 using_directives (struct dwarf2_cu
*cu
)
11167 if (cu
->language
== language_ada
11168 && cu
->get_builder ()->outermost_context_p ())
11169 return cu
->get_builder ()->get_global_using_directives ();
11171 return cu
->get_builder ()->get_local_using_directives ();
11174 /* Read the import statement specified by the given die and record it. */
11177 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11179 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11180 struct attribute
*import_attr
;
11181 struct die_info
*imported_die
, *child_die
;
11182 struct dwarf2_cu
*imported_cu
;
11183 const char *imported_name
;
11184 const char *imported_name_prefix
;
11185 const char *canonical_name
;
11186 const char *import_alias
;
11187 const char *imported_declaration
= NULL
;
11188 const char *import_prefix
;
11189 std::vector
<const char *> excludes
;
11191 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11192 if (import_attr
== NULL
)
11194 complaint (_("Tag '%s' has no DW_AT_import"),
11195 dwarf_tag_name (die
->tag
));
11200 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11201 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11202 if (imported_name
== NULL
)
11204 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11206 The import in the following code:
11220 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11221 <52> DW_AT_decl_file : 1
11222 <53> DW_AT_decl_line : 6
11223 <54> DW_AT_import : <0x75>
11224 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11225 <59> DW_AT_name : B
11226 <5b> DW_AT_decl_file : 1
11227 <5c> DW_AT_decl_line : 2
11228 <5d> DW_AT_type : <0x6e>
11230 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11231 <76> DW_AT_byte_size : 4
11232 <77> DW_AT_encoding : 5 (signed)
11234 imports the wrong die ( 0x75 instead of 0x58 ).
11235 This case will be ignored until the gcc bug is fixed. */
11239 /* Figure out the local name after import. */
11240 import_alias
= dwarf2_name (die
, cu
);
11242 /* Figure out where the statement is being imported to. */
11243 import_prefix
= determine_prefix (die
, cu
);
11245 /* Figure out what the scope of the imported die is and prepend it
11246 to the name of the imported die. */
11247 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11249 if (imported_die
->tag
!= DW_TAG_namespace
11250 && imported_die
->tag
!= DW_TAG_module
)
11252 imported_declaration
= imported_name
;
11253 canonical_name
= imported_name_prefix
;
11255 else if (strlen (imported_name_prefix
) > 0)
11256 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11257 imported_name_prefix
,
11258 (cu
->language
== language_d
? "." : "::"),
11259 imported_name
, (char *) NULL
);
11261 canonical_name
= imported_name
;
11263 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11264 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11265 child_die
= sibling_die (child_die
))
11267 /* DWARF-4: A Fortran use statement with a “rename list” may be
11268 represented by an imported module entry with an import attribute
11269 referring to the module and owned entries corresponding to those
11270 entities that are renamed as part of being imported. */
11272 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11274 complaint (_("child DW_TAG_imported_declaration expected "
11275 "- DIE at %s [in module %s]"),
11276 sect_offset_str (child_die
->sect_off
),
11277 objfile_name (objfile
));
11281 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11282 if (import_attr
== NULL
)
11284 complaint (_("Tag '%s' has no DW_AT_import"),
11285 dwarf_tag_name (child_die
->tag
));
11290 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11292 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11293 if (imported_name
== NULL
)
11295 complaint (_("child DW_TAG_imported_declaration has unknown "
11296 "imported name - DIE at %s [in module %s]"),
11297 sect_offset_str (child_die
->sect_off
),
11298 objfile_name (objfile
));
11302 excludes
.push_back (imported_name
);
11304 process_die (child_die
, cu
);
11307 add_using_directive (using_directives (cu
),
11311 imported_declaration
,
11314 &objfile
->objfile_obstack
);
11317 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11318 types, but gives them a size of zero. Starting with version 14,
11319 ICC is compatible with GCC. */
11322 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11324 if (!cu
->checked_producer
)
11325 check_producer (cu
);
11327 return cu
->producer_is_icc_lt_14
;
11330 /* ICC generates a DW_AT_type for C void functions. This was observed on
11331 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
11332 which says that void functions should not have a DW_AT_type. */
11335 producer_is_icc (struct dwarf2_cu
*cu
)
11337 if (!cu
->checked_producer
)
11338 check_producer (cu
);
11340 return cu
->producer_is_icc
;
11343 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11344 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11345 this, it was first present in GCC release 4.3.0. */
11348 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11350 if (!cu
->checked_producer
)
11351 check_producer (cu
);
11353 return cu
->producer_is_gcc_lt_4_3
;
11356 static file_and_directory
11357 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11359 file_and_directory res
;
11361 /* Find the filename. Do not use dwarf2_name here, since the filename
11362 is not a source language identifier. */
11363 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11364 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11366 if (res
.comp_dir
== NULL
11367 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11368 && IS_ABSOLUTE_PATH (res
.name
))
11370 res
.comp_dir_storage
= ldirname (res
.name
);
11371 if (!res
.comp_dir_storage
.empty ())
11372 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11374 if (res
.comp_dir
!= NULL
)
11376 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11377 directory, get rid of it. */
11378 const char *cp
= strchr (res
.comp_dir
, ':');
11380 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11381 res
.comp_dir
= cp
+ 1;
11384 if (res
.name
== NULL
)
11385 res
.name
= "<unknown>";
11390 /* Handle DW_AT_stmt_list for a compilation unit.
11391 DIE is the DW_TAG_compile_unit die for CU.
11392 COMP_DIR is the compilation directory. LOWPC is passed to
11393 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11396 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11397 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11399 struct dwarf2_per_objfile
*dwarf2_per_objfile
11400 = cu
->per_cu
->dwarf2_per_objfile
;
11401 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11402 struct attribute
*attr
;
11403 struct line_header line_header_local
;
11404 hashval_t line_header_local_hash
;
11406 int decode_mapping
;
11408 gdb_assert (! cu
->per_cu
->is_debug_types
);
11410 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11414 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11416 /* The line header hash table is only created if needed (it exists to
11417 prevent redundant reading of the line table for partial_units).
11418 If we're given a partial_unit, we'll need it. If we're given a
11419 compile_unit, then use the line header hash table if it's already
11420 created, but don't create one just yet. */
11422 if (dwarf2_per_objfile
->line_header_hash
== NULL
11423 && die
->tag
== DW_TAG_partial_unit
)
11425 dwarf2_per_objfile
->line_header_hash
11426 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11427 line_header_eq_voidp
,
11428 free_line_header_voidp
,
11429 &objfile
->objfile_obstack
,
11430 hashtab_obstack_allocate
,
11431 dummy_obstack_deallocate
);
11434 line_header_local
.sect_off
= line_offset
;
11435 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11436 line_header_local_hash
= line_header_hash (&line_header_local
);
11437 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11439 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11440 &line_header_local
,
11441 line_header_local_hash
, NO_INSERT
);
11443 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11444 is not present in *SLOT (since if there is something in *SLOT then
11445 it will be for a partial_unit). */
11446 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11448 gdb_assert (*slot
!= NULL
);
11449 cu
->line_header
= (struct line_header
*) *slot
;
11454 /* dwarf_decode_line_header does not yet provide sufficient information.
11455 We always have to call also dwarf_decode_lines for it. */
11456 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11460 cu
->line_header
= lh
.release ();
11461 cu
->line_header_die_owner
= die
;
11463 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11467 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11468 &line_header_local
,
11469 line_header_local_hash
, INSERT
);
11470 gdb_assert (slot
!= NULL
);
11472 if (slot
!= NULL
&& *slot
== NULL
)
11474 /* This newly decoded line number information unit will be owned
11475 by line_header_hash hash table. */
11476 *slot
= cu
->line_header
;
11477 cu
->line_header_die_owner
= NULL
;
11481 /* We cannot free any current entry in (*slot) as that struct line_header
11482 may be already used by multiple CUs. Create only temporary decoded
11483 line_header for this CU - it may happen at most once for each line
11484 number information unit. And if we're not using line_header_hash
11485 then this is what we want as well. */
11486 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11488 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11489 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11494 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11497 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11499 struct dwarf2_per_objfile
*dwarf2_per_objfile
11500 = cu
->per_cu
->dwarf2_per_objfile
;
11501 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11502 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11503 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11504 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11505 struct attribute
*attr
;
11506 struct die_info
*child_die
;
11507 CORE_ADDR baseaddr
;
11509 prepare_one_comp_unit (cu
, die
, cu
->language
);
11510 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11512 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11514 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11515 from finish_block. */
11516 if (lowpc
== ((CORE_ADDR
) -1))
11518 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11520 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11522 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11523 standardised yet. As a workaround for the language detection we fall
11524 back to the DW_AT_producer string. */
11525 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11526 cu
->language
= language_opencl
;
11528 /* Similar hack for Go. */
11529 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11530 set_cu_language (DW_LANG_Go
, cu
);
11532 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
11534 /* Decode line number information if present. We do this before
11535 processing child DIEs, so that the line header table is available
11536 for DW_AT_decl_file. */
11537 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11539 /* Process all dies in compilation unit. */
11540 if (die
->child
!= NULL
)
11542 child_die
= die
->child
;
11543 while (child_die
&& child_die
->tag
)
11545 process_die (child_die
, cu
);
11546 child_die
= sibling_die (child_die
);
11550 /* Decode macro information, if present. Dwarf 2 macro information
11551 refers to information in the line number info statement program
11552 header, so we can only read it if we've read the header
11554 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11556 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11557 if (attr
&& cu
->line_header
)
11559 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11560 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11562 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11566 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11567 if (attr
&& cu
->line_header
)
11569 unsigned int macro_offset
= DW_UNSND (attr
);
11571 dwarf_decode_macros (cu
, macro_offset
, 0);
11577 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11579 struct type_unit_group
*tu_group
;
11581 struct attribute
*attr
;
11583 struct signatured_type
*sig_type
;
11585 gdb_assert (per_cu
->is_debug_types
);
11586 sig_type
= (struct signatured_type
*) per_cu
;
11588 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11590 /* If we're using .gdb_index (includes -readnow) then
11591 per_cu->type_unit_group may not have been set up yet. */
11592 if (sig_type
->type_unit_group
== NULL
)
11593 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11594 tu_group
= sig_type
->type_unit_group
;
11596 /* If we've already processed this stmt_list there's no real need to
11597 do it again, we could fake it and just recreate the part we need
11598 (file name,index -> symtab mapping). If data shows this optimization
11599 is useful we can do it then. */
11600 first_time
= tu_group
->compunit_symtab
== NULL
;
11602 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11607 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11608 lh
= dwarf_decode_line_header (line_offset
, this);
11613 start_symtab ("", NULL
, 0);
11616 gdb_assert (tu_group
->symtabs
== NULL
);
11617 gdb_assert (m_builder
== nullptr);
11618 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11619 m_builder
.reset (new struct buildsym_compunit
11620 (COMPUNIT_OBJFILE (cust
), "",
11621 COMPUNIT_DIRNAME (cust
),
11622 compunit_language (cust
),
11628 line_header
= lh
.release ();
11629 line_header_die_owner
= die
;
11633 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11635 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11636 still initializing it, and our caller (a few levels up)
11637 process_full_type_unit still needs to know if this is the first
11640 tu_group
->num_symtabs
= line_header
->file_names
.size ();
11641 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11642 line_header
->file_names
.size ());
11644 for (i
= 0; i
< line_header
->file_names
.size (); ++i
)
11646 file_entry
&fe
= line_header
->file_names
[i
];
11648 dwarf2_start_subfile (this, fe
.name
,
11649 fe
.include_dir (line_header
));
11650 buildsym_compunit
*b
= get_builder ();
11651 if (b
->get_current_subfile ()->symtab
== NULL
)
11653 /* NOTE: start_subfile will recognize when it's been
11654 passed a file it has already seen. So we can't
11655 assume there's a simple mapping from
11656 cu->line_header->file_names to subfiles, plus
11657 cu->line_header->file_names may contain dups. */
11658 b
->get_current_subfile ()->symtab
11659 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11662 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11663 tu_group
->symtabs
[i
] = fe
.symtab
;
11668 gdb_assert (m_builder
== nullptr);
11669 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11670 m_builder
.reset (new struct buildsym_compunit
11671 (COMPUNIT_OBJFILE (cust
), "",
11672 COMPUNIT_DIRNAME (cust
),
11673 compunit_language (cust
),
11676 for (i
= 0; i
< line_header
->file_names
.size (); ++i
)
11678 file_entry
&fe
= line_header
->file_names
[i
];
11680 fe
.symtab
= tu_group
->symtabs
[i
];
11684 /* The main symtab is allocated last. Type units don't have DW_AT_name
11685 so they don't have a "real" (so to speak) symtab anyway.
11686 There is later code that will assign the main symtab to all symbols
11687 that don't have one. We need to handle the case of a symbol with a
11688 missing symtab (DW_AT_decl_file) anyway. */
11691 /* Process DW_TAG_type_unit.
11692 For TUs we want to skip the first top level sibling if it's not the
11693 actual type being defined by this TU. In this case the first top
11694 level sibling is there to provide context only. */
11697 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11699 struct die_info
*child_die
;
11701 prepare_one_comp_unit (cu
, die
, language_minimal
);
11703 /* Initialize (or reinitialize) the machinery for building symtabs.
11704 We do this before processing child DIEs, so that the line header table
11705 is available for DW_AT_decl_file. */
11706 cu
->setup_type_unit_groups (die
);
11708 if (die
->child
!= NULL
)
11710 child_die
= die
->child
;
11711 while (child_die
&& child_die
->tag
)
11713 process_die (child_die
, cu
);
11714 child_die
= sibling_die (child_die
);
11721 http://gcc.gnu.org/wiki/DebugFission
11722 http://gcc.gnu.org/wiki/DebugFissionDWP
11724 To simplify handling of both DWO files ("object" files with the DWARF info)
11725 and DWP files (a file with the DWOs packaged up into one file), we treat
11726 DWP files as having a collection of virtual DWO files. */
11729 hash_dwo_file (const void *item
)
11731 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11734 hash
= htab_hash_string (dwo_file
->dwo_name
);
11735 if (dwo_file
->comp_dir
!= NULL
)
11736 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11741 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11743 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11744 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11746 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11748 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11749 return lhs
->comp_dir
== rhs
->comp_dir
;
11750 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11753 /* Allocate a hash table for DWO files. */
11756 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11758 auto delete_dwo_file
= [] (void *item
)
11760 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11765 return htab_up (htab_create_alloc_ex (41,
11769 &objfile
->objfile_obstack
,
11770 hashtab_obstack_allocate
,
11771 dummy_obstack_deallocate
));
11774 /* Lookup DWO file DWO_NAME. */
11777 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11778 const char *dwo_name
,
11779 const char *comp_dir
)
11781 struct dwo_file find_entry
;
11784 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11785 dwarf2_per_objfile
->dwo_files
11786 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11788 find_entry
.dwo_name
= dwo_name
;
11789 find_entry
.comp_dir
= comp_dir
;
11790 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
.get (), &find_entry
,
11797 hash_dwo_unit (const void *item
)
11799 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11801 /* This drops the top 32 bits of the id, but is ok for a hash. */
11802 return dwo_unit
->signature
;
11806 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11808 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11809 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11811 /* The signature is assumed to be unique within the DWO file.
11812 So while object file CU dwo_id's always have the value zero,
11813 that's OK, assuming each object file DWO file has only one CU,
11814 and that's the rule for now. */
11815 return lhs
->signature
== rhs
->signature
;
11818 /* Allocate a hash table for DWO CUs,TUs.
11819 There is one of these tables for each of CUs,TUs for each DWO file. */
11822 allocate_dwo_unit_table (struct objfile
*objfile
)
11824 /* Start out with a pretty small number.
11825 Generally DWO files contain only one CU and maybe some TUs. */
11826 return htab_create_alloc_ex (3,
11830 &objfile
->objfile_obstack
,
11831 hashtab_obstack_allocate
,
11832 dummy_obstack_deallocate
);
11835 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11837 struct create_dwo_cu_data
11839 struct dwo_file
*dwo_file
;
11840 struct dwo_unit dwo_unit
;
11843 /* die_reader_func for create_dwo_cu. */
11846 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11847 const gdb_byte
*info_ptr
,
11848 struct die_info
*comp_unit_die
,
11852 struct dwarf2_cu
*cu
= reader
->cu
;
11853 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11854 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11855 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11856 struct dwo_file
*dwo_file
= data
->dwo_file
;
11857 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11858 struct attribute
*attr
;
11860 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11863 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11864 " its dwo_id [in module %s]"),
11865 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11869 dwo_unit
->dwo_file
= dwo_file
;
11870 dwo_unit
->signature
= DW_UNSND (attr
);
11871 dwo_unit
->section
= section
;
11872 dwo_unit
->sect_off
= sect_off
;
11873 dwo_unit
->length
= cu
->per_cu
->length
;
11875 if (dwarf_read_debug
)
11876 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11877 sect_offset_str (sect_off
),
11878 hex_string (dwo_unit
->signature
));
11881 /* Create the dwo_units for the CUs in a DWO_FILE.
11882 Note: This function processes DWO files only, not DWP files. */
11885 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11886 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11889 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11890 const gdb_byte
*info_ptr
, *end_ptr
;
11892 dwarf2_read_section (objfile
, §ion
);
11893 info_ptr
= section
.buffer
;
11895 if (info_ptr
== NULL
)
11898 if (dwarf_read_debug
)
11900 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11901 get_section_name (§ion
),
11902 get_section_file_name (§ion
));
11905 end_ptr
= info_ptr
+ section
.size
;
11906 while (info_ptr
< end_ptr
)
11908 struct dwarf2_per_cu_data per_cu
;
11909 struct create_dwo_cu_data create_dwo_cu_data
;
11910 struct dwo_unit
*dwo_unit
;
11912 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11914 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11915 sizeof (create_dwo_cu_data
.dwo_unit
));
11916 memset (&per_cu
, 0, sizeof (per_cu
));
11917 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11918 per_cu
.is_debug_types
= 0;
11919 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11920 per_cu
.section
= §ion
;
11921 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11923 init_cutu_and_read_dies_no_follow (
11924 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11925 info_ptr
+= per_cu
.length
;
11927 // If the unit could not be parsed, skip it.
11928 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11931 if (cus_htab
== NULL
)
11932 cus_htab
= allocate_dwo_unit_table (objfile
);
11934 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11935 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
11936 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11937 gdb_assert (slot
!= NULL
);
11940 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11941 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11943 complaint (_("debug cu entry at offset %s is duplicate to"
11944 " the entry at offset %s, signature %s"),
11945 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11946 hex_string (dwo_unit
->signature
));
11948 *slot
= (void *)dwo_unit
;
11952 /* DWP file .debug_{cu,tu}_index section format:
11953 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11957 Both index sections have the same format, and serve to map a 64-bit
11958 signature to a set of section numbers. Each section begins with a header,
11959 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11960 indexes, and a pool of 32-bit section numbers. The index sections will be
11961 aligned at 8-byte boundaries in the file.
11963 The index section header consists of:
11965 V, 32 bit version number
11967 N, 32 bit number of compilation units or type units in the index
11968 M, 32 bit number of slots in the hash table
11970 Numbers are recorded using the byte order of the application binary.
11972 The hash table begins at offset 16 in the section, and consists of an array
11973 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11974 order of the application binary). Unused slots in the hash table are 0.
11975 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11977 The parallel table begins immediately after the hash table
11978 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11979 array of 32-bit indexes (using the byte order of the application binary),
11980 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11981 table contains a 32-bit index into the pool of section numbers. For unused
11982 hash table slots, the corresponding entry in the parallel table will be 0.
11984 The pool of section numbers begins immediately following the hash table
11985 (at offset 16 + 12 * M from the beginning of the section). The pool of
11986 section numbers consists of an array of 32-bit words (using the byte order
11987 of the application binary). Each item in the array is indexed starting
11988 from 0. The hash table entry provides the index of the first section
11989 number in the set. Additional section numbers in the set follow, and the
11990 set is terminated by a 0 entry (section number 0 is not used in ELF).
11992 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11993 section must be the first entry in the set, and the .debug_abbrev.dwo must
11994 be the second entry. Other members of the set may follow in any order.
12000 DWP Version 2 combines all the .debug_info, etc. sections into one,
12001 and the entries in the index tables are now offsets into these sections.
12002 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
12005 Index Section Contents:
12007 Hash Table of Signatures dwp_hash_table.hash_table
12008 Parallel Table of Indices dwp_hash_table.unit_table
12009 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
12010 Table of Section Sizes dwp_hash_table.v2.sizes
12012 The index section header consists of:
12014 V, 32 bit version number
12015 L, 32 bit number of columns in the table of section offsets
12016 N, 32 bit number of compilation units or type units in the index
12017 M, 32 bit number of slots in the hash table
12019 Numbers are recorded using the byte order of the application binary.
12021 The hash table has the same format as version 1.
12022 The parallel table of indices has the same format as version 1,
12023 except that the entries are origin-1 indices into the table of sections
12024 offsets and the table of section sizes.
12026 The table of offsets begins immediately following the parallel table
12027 (at offset 16 + 12 * M from the beginning of the section). The table is
12028 a two-dimensional array of 32-bit words (using the byte order of the
12029 application binary), with L columns and N+1 rows, in row-major order.
12030 Each row in the array is indexed starting from 0. The first row provides
12031 a key to the remaining rows: each column in this row provides an identifier
12032 for a debug section, and the offsets in the same column of subsequent rows
12033 refer to that section. The section identifiers are:
12035 DW_SECT_INFO 1 .debug_info.dwo
12036 DW_SECT_TYPES 2 .debug_types.dwo
12037 DW_SECT_ABBREV 3 .debug_abbrev.dwo
12038 DW_SECT_LINE 4 .debug_line.dwo
12039 DW_SECT_LOC 5 .debug_loc.dwo
12040 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
12041 DW_SECT_MACINFO 7 .debug_macinfo.dwo
12042 DW_SECT_MACRO 8 .debug_macro.dwo
12044 The offsets provided by the CU and TU index sections are the base offsets
12045 for the contributions made by each CU or TU to the corresponding section
12046 in the package file. Each CU and TU header contains an abbrev_offset
12047 field, used to find the abbreviations table for that CU or TU within the
12048 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
12049 be interpreted as relative to the base offset given in the index section.
12050 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
12051 should be interpreted as relative to the base offset for .debug_line.dwo,
12052 and offsets into other debug sections obtained from DWARF attributes should
12053 also be interpreted as relative to the corresponding base offset.
12055 The table of sizes begins immediately following the table of offsets.
12056 Like the table of offsets, it is a two-dimensional array of 32-bit words,
12057 with L columns and N rows, in row-major order. Each row in the array is
12058 indexed starting from 1 (row 0 is shared by the two tables).
12062 Hash table lookup is handled the same in version 1 and 2:
12064 We assume that N and M will not exceed 2^32 - 1.
12065 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12067 Given a 64-bit compilation unit signature or a type signature S, an entry
12068 in the hash table is located as follows:
12070 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12071 the low-order k bits all set to 1.
12073 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12075 3) If the hash table entry at index H matches the signature, use that
12076 entry. If the hash table entry at index H is unused (all zeroes),
12077 terminate the search: the signature is not present in the table.
12079 4) Let H = (H + H') modulo M. Repeat at Step 3.
12081 Because M > N and H' and M are relatively prime, the search is guaranteed
12082 to stop at an unused slot or find the match. */
12084 /* Create a hash table to map DWO IDs to their CU/TU entry in
12085 .debug_{info,types}.dwo in DWP_FILE.
12086 Returns NULL if there isn't one.
12087 Note: This function processes DWP files only, not DWO files. */
12089 static struct dwp_hash_table
*
12090 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12091 struct dwp_file
*dwp_file
, int is_debug_types
)
12093 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12094 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12095 const gdb_byte
*index_ptr
, *index_end
;
12096 struct dwarf2_section_info
*index
;
12097 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12098 struct dwp_hash_table
*htab
;
12100 if (is_debug_types
)
12101 index
= &dwp_file
->sections
.tu_index
;
12103 index
= &dwp_file
->sections
.cu_index
;
12105 if (dwarf2_section_empty_p (index
))
12107 dwarf2_read_section (objfile
, index
);
12109 index_ptr
= index
->buffer
;
12110 index_end
= index_ptr
+ index
->size
;
12112 version
= read_4_bytes (dbfd
, index_ptr
);
12115 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12119 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12121 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12124 if (version
!= 1 && version
!= 2)
12126 error (_("Dwarf Error: unsupported DWP file version (%s)"
12127 " [in module %s]"),
12128 pulongest (version
), dwp_file
->name
);
12130 if (nr_slots
!= (nr_slots
& -nr_slots
))
12132 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12133 " is not power of 2 [in module %s]"),
12134 pulongest (nr_slots
), dwp_file
->name
);
12137 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12138 htab
->version
= version
;
12139 htab
->nr_columns
= nr_columns
;
12140 htab
->nr_units
= nr_units
;
12141 htab
->nr_slots
= nr_slots
;
12142 htab
->hash_table
= index_ptr
;
12143 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12145 /* Exit early if the table is empty. */
12146 if (nr_slots
== 0 || nr_units
== 0
12147 || (version
== 2 && nr_columns
== 0))
12149 /* All must be zero. */
12150 if (nr_slots
!= 0 || nr_units
!= 0
12151 || (version
== 2 && nr_columns
!= 0))
12153 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
12154 " all zero [in modules %s]"),
12162 htab
->section_pool
.v1
.indices
=
12163 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12164 /* It's harder to decide whether the section is too small in v1.
12165 V1 is deprecated anyway so we punt. */
12169 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12170 int *ids
= htab
->section_pool
.v2
.section_ids
;
12171 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
12172 /* Reverse map for error checking. */
12173 int ids_seen
[DW_SECT_MAX
+ 1];
12176 if (nr_columns
< 2)
12178 error (_("Dwarf Error: bad DWP hash table, too few columns"
12179 " in section table [in module %s]"),
12182 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12184 error (_("Dwarf Error: bad DWP hash table, too many columns"
12185 " in section table [in module %s]"),
12188 memset (ids
, 255, sizeof_ids
);
12189 memset (ids_seen
, 255, sizeof (ids_seen
));
12190 for (i
= 0; i
< nr_columns
; ++i
)
12192 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12194 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12196 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12197 " in section table [in module %s]"),
12198 id
, dwp_file
->name
);
12200 if (ids_seen
[id
] != -1)
12202 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12203 " id %d in section table [in module %s]"),
12204 id
, dwp_file
->name
);
12209 /* Must have exactly one info or types section. */
12210 if (((ids_seen
[DW_SECT_INFO
] != -1)
12211 + (ids_seen
[DW_SECT_TYPES
] != -1))
12214 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12215 " DWO info/types section [in module %s]"),
12218 /* Must have an abbrev section. */
12219 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12221 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12222 " section [in module %s]"),
12225 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12226 htab
->section_pool
.v2
.sizes
=
12227 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12228 * nr_units
* nr_columns
);
12229 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12230 * nr_units
* nr_columns
))
12233 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12234 " [in module %s]"),
12242 /* Update SECTIONS with the data from SECTP.
12244 This function is like the other "locate" section routines that are
12245 passed to bfd_map_over_sections, but in this context the sections to
12246 read comes from the DWP V1 hash table, not the full ELF section table.
12248 The result is non-zero for success, or zero if an error was found. */
12251 locate_v1_virtual_dwo_sections (asection
*sectp
,
12252 struct virtual_v1_dwo_sections
*sections
)
12254 const struct dwop_section_names
*names
= &dwop_section_names
;
12256 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12258 /* There can be only one. */
12259 if (sections
->abbrev
.s
.section
!= NULL
)
12261 sections
->abbrev
.s
.section
= sectp
;
12262 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12264 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12265 || section_is_p (sectp
->name
, &names
->types_dwo
))
12267 /* There can be only one. */
12268 if (sections
->info_or_types
.s
.section
!= NULL
)
12270 sections
->info_or_types
.s
.section
= sectp
;
12271 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12273 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12275 /* There can be only one. */
12276 if (sections
->line
.s
.section
!= NULL
)
12278 sections
->line
.s
.section
= sectp
;
12279 sections
->line
.size
= bfd_get_section_size (sectp
);
12281 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12283 /* There can be only one. */
12284 if (sections
->loc
.s
.section
!= NULL
)
12286 sections
->loc
.s
.section
= sectp
;
12287 sections
->loc
.size
= bfd_get_section_size (sectp
);
12289 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12291 /* There can be only one. */
12292 if (sections
->macinfo
.s
.section
!= NULL
)
12294 sections
->macinfo
.s
.section
= sectp
;
12295 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12297 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12299 /* There can be only one. */
12300 if (sections
->macro
.s
.section
!= NULL
)
12302 sections
->macro
.s
.section
= sectp
;
12303 sections
->macro
.size
= bfd_get_section_size (sectp
);
12305 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12307 /* There can be only one. */
12308 if (sections
->str_offsets
.s
.section
!= NULL
)
12310 sections
->str_offsets
.s
.section
= sectp
;
12311 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12315 /* No other kind of section is valid. */
12322 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12323 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12324 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12325 This is for DWP version 1 files. */
12327 static struct dwo_unit
*
12328 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12329 struct dwp_file
*dwp_file
,
12330 uint32_t unit_index
,
12331 const char *comp_dir
,
12332 ULONGEST signature
, int is_debug_types
)
12334 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12335 const struct dwp_hash_table
*dwp_htab
=
12336 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12337 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12338 const char *kind
= is_debug_types
? "TU" : "CU";
12339 struct dwo_file
*dwo_file
;
12340 struct dwo_unit
*dwo_unit
;
12341 struct virtual_v1_dwo_sections sections
;
12342 void **dwo_file_slot
;
12345 gdb_assert (dwp_file
->version
== 1);
12347 if (dwarf_read_debug
)
12349 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12351 pulongest (unit_index
), hex_string (signature
),
12355 /* Fetch the sections of this DWO unit.
12356 Put a limit on the number of sections we look for so that bad data
12357 doesn't cause us to loop forever. */
12359 #define MAX_NR_V1_DWO_SECTIONS \
12360 (1 /* .debug_info or .debug_types */ \
12361 + 1 /* .debug_abbrev */ \
12362 + 1 /* .debug_line */ \
12363 + 1 /* .debug_loc */ \
12364 + 1 /* .debug_str_offsets */ \
12365 + 1 /* .debug_macro or .debug_macinfo */ \
12366 + 1 /* trailing zero */)
12368 memset (§ions
, 0, sizeof (sections
));
12370 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12373 uint32_t section_nr
=
12374 read_4_bytes (dbfd
,
12375 dwp_htab
->section_pool
.v1
.indices
12376 + (unit_index
+ i
) * sizeof (uint32_t));
12378 if (section_nr
== 0)
12380 if (section_nr
>= dwp_file
->num_sections
)
12382 error (_("Dwarf Error: bad DWP hash table, section number too large"
12383 " [in module %s]"),
12387 sectp
= dwp_file
->elf_sections
[section_nr
];
12388 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12390 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12391 " [in module %s]"),
12397 || dwarf2_section_empty_p (§ions
.info_or_types
)
12398 || dwarf2_section_empty_p (§ions
.abbrev
))
12400 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12401 " [in module %s]"),
12404 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12406 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12407 " [in module %s]"),
12411 /* It's easier for the rest of the code if we fake a struct dwo_file and
12412 have dwo_unit "live" in that. At least for now.
12414 The DWP file can be made up of a random collection of CUs and TUs.
12415 However, for each CU + set of TUs that came from the same original DWO
12416 file, we can combine them back into a virtual DWO file to save space
12417 (fewer struct dwo_file objects to allocate). Remember that for really
12418 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12420 std::string virtual_dwo_name
=
12421 string_printf ("virtual-dwo/%d-%d-%d-%d",
12422 get_section_id (§ions
.abbrev
),
12423 get_section_id (§ions
.line
),
12424 get_section_id (§ions
.loc
),
12425 get_section_id (§ions
.str_offsets
));
12426 /* Can we use an existing virtual DWO file? */
12427 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12428 virtual_dwo_name
.c_str (),
12430 /* Create one if necessary. */
12431 if (*dwo_file_slot
== NULL
)
12433 if (dwarf_read_debug
)
12435 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12436 virtual_dwo_name
.c_str ());
12438 dwo_file
= new struct dwo_file
;
12440 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12441 virtual_dwo_name
.c_str (),
12442 virtual_dwo_name
.size ());
12443 dwo_file
->comp_dir
= comp_dir
;
12444 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12445 dwo_file
->sections
.line
= sections
.line
;
12446 dwo_file
->sections
.loc
= sections
.loc
;
12447 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12448 dwo_file
->sections
.macro
= sections
.macro
;
12449 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12450 /* The "str" section is global to the entire DWP file. */
12451 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12452 /* The info or types section is assigned below to dwo_unit,
12453 there's no need to record it in dwo_file.
12454 Also, we can't simply record type sections in dwo_file because
12455 we record a pointer into the vector in dwo_unit. As we collect more
12456 types we'll grow the vector and eventually have to reallocate space
12457 for it, invalidating all copies of pointers into the previous
12459 *dwo_file_slot
= dwo_file
;
12463 if (dwarf_read_debug
)
12465 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12466 virtual_dwo_name
.c_str ());
12468 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12471 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12472 dwo_unit
->dwo_file
= dwo_file
;
12473 dwo_unit
->signature
= signature
;
12474 dwo_unit
->section
=
12475 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12476 *dwo_unit
->section
= sections
.info_or_types
;
12477 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12482 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12483 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12484 piece within that section used by a TU/CU, return a virtual section
12485 of just that piece. */
12487 static struct dwarf2_section_info
12488 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12489 struct dwarf2_section_info
*section
,
12490 bfd_size_type offset
, bfd_size_type size
)
12492 struct dwarf2_section_info result
;
12495 gdb_assert (section
!= NULL
);
12496 gdb_assert (!section
->is_virtual
);
12498 memset (&result
, 0, sizeof (result
));
12499 result
.s
.containing_section
= section
;
12500 result
.is_virtual
= true;
12505 sectp
= get_section_bfd_section (section
);
12507 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12508 bounds of the real section. This is a pretty-rare event, so just
12509 flag an error (easier) instead of a warning and trying to cope. */
12511 || offset
+ size
> bfd_get_section_size (sectp
))
12513 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12514 " in section %s [in module %s]"),
12515 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12516 objfile_name (dwarf2_per_objfile
->objfile
));
12519 result
.virtual_offset
= offset
;
12520 result
.size
= size
;
12524 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12525 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12526 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12527 This is for DWP version 2 files. */
12529 static struct dwo_unit
*
12530 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12531 struct dwp_file
*dwp_file
,
12532 uint32_t unit_index
,
12533 const char *comp_dir
,
12534 ULONGEST signature
, int is_debug_types
)
12536 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12537 const struct dwp_hash_table
*dwp_htab
=
12538 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12539 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12540 const char *kind
= is_debug_types
? "TU" : "CU";
12541 struct dwo_file
*dwo_file
;
12542 struct dwo_unit
*dwo_unit
;
12543 struct virtual_v2_dwo_sections sections
;
12544 void **dwo_file_slot
;
12547 gdb_assert (dwp_file
->version
== 2);
12549 if (dwarf_read_debug
)
12551 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12553 pulongest (unit_index
), hex_string (signature
),
12557 /* Fetch the section offsets of this DWO unit. */
12559 memset (§ions
, 0, sizeof (sections
));
12561 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12563 uint32_t offset
= read_4_bytes (dbfd
,
12564 dwp_htab
->section_pool
.v2
.offsets
12565 + (((unit_index
- 1) * dwp_htab
->nr_columns
12567 * sizeof (uint32_t)));
12568 uint32_t size
= read_4_bytes (dbfd
,
12569 dwp_htab
->section_pool
.v2
.sizes
12570 + (((unit_index
- 1) * dwp_htab
->nr_columns
12572 * sizeof (uint32_t)));
12574 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12577 case DW_SECT_TYPES
:
12578 sections
.info_or_types_offset
= offset
;
12579 sections
.info_or_types_size
= size
;
12581 case DW_SECT_ABBREV
:
12582 sections
.abbrev_offset
= offset
;
12583 sections
.abbrev_size
= size
;
12586 sections
.line_offset
= offset
;
12587 sections
.line_size
= size
;
12590 sections
.loc_offset
= offset
;
12591 sections
.loc_size
= size
;
12593 case DW_SECT_STR_OFFSETS
:
12594 sections
.str_offsets_offset
= offset
;
12595 sections
.str_offsets_size
= size
;
12597 case DW_SECT_MACINFO
:
12598 sections
.macinfo_offset
= offset
;
12599 sections
.macinfo_size
= size
;
12601 case DW_SECT_MACRO
:
12602 sections
.macro_offset
= offset
;
12603 sections
.macro_size
= size
;
12608 /* It's easier for the rest of the code if we fake a struct dwo_file and
12609 have dwo_unit "live" in that. At least for now.
12611 The DWP file can be made up of a random collection of CUs and TUs.
12612 However, for each CU + set of TUs that came from the same original DWO
12613 file, we can combine them back into a virtual DWO file to save space
12614 (fewer struct dwo_file objects to allocate). Remember that for really
12615 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12617 std::string virtual_dwo_name
=
12618 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12619 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12620 (long) (sections
.line_size
? sections
.line_offset
: 0),
12621 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12622 (long) (sections
.str_offsets_size
12623 ? sections
.str_offsets_offset
: 0));
12624 /* Can we use an existing virtual DWO file? */
12625 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12626 virtual_dwo_name
.c_str (),
12628 /* Create one if necessary. */
12629 if (*dwo_file_slot
== NULL
)
12631 if (dwarf_read_debug
)
12633 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12634 virtual_dwo_name
.c_str ());
12636 dwo_file
= new struct dwo_file
;
12638 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12639 virtual_dwo_name
.c_str (),
12640 virtual_dwo_name
.size ());
12641 dwo_file
->comp_dir
= comp_dir
;
12642 dwo_file
->sections
.abbrev
=
12643 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12644 sections
.abbrev_offset
, sections
.abbrev_size
);
12645 dwo_file
->sections
.line
=
12646 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12647 sections
.line_offset
, sections
.line_size
);
12648 dwo_file
->sections
.loc
=
12649 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12650 sections
.loc_offset
, sections
.loc_size
);
12651 dwo_file
->sections
.macinfo
=
12652 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12653 sections
.macinfo_offset
, sections
.macinfo_size
);
12654 dwo_file
->sections
.macro
=
12655 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12656 sections
.macro_offset
, sections
.macro_size
);
12657 dwo_file
->sections
.str_offsets
=
12658 create_dwp_v2_section (dwarf2_per_objfile
,
12659 &dwp_file
->sections
.str_offsets
,
12660 sections
.str_offsets_offset
,
12661 sections
.str_offsets_size
);
12662 /* The "str" section is global to the entire DWP file. */
12663 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12664 /* The info or types section is assigned below to dwo_unit,
12665 there's no need to record it in dwo_file.
12666 Also, we can't simply record type sections in dwo_file because
12667 we record a pointer into the vector in dwo_unit. As we collect more
12668 types we'll grow the vector and eventually have to reallocate space
12669 for it, invalidating all copies of pointers into the previous
12671 *dwo_file_slot
= dwo_file
;
12675 if (dwarf_read_debug
)
12677 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12678 virtual_dwo_name
.c_str ());
12680 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12683 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12684 dwo_unit
->dwo_file
= dwo_file
;
12685 dwo_unit
->signature
= signature
;
12686 dwo_unit
->section
=
12687 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12688 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12690 ? &dwp_file
->sections
.types
12691 : &dwp_file
->sections
.info
,
12692 sections
.info_or_types_offset
,
12693 sections
.info_or_types_size
);
12694 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12699 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12700 Returns NULL if the signature isn't found. */
12702 static struct dwo_unit
*
12703 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12704 struct dwp_file
*dwp_file
, const char *comp_dir
,
12705 ULONGEST signature
, int is_debug_types
)
12707 const struct dwp_hash_table
*dwp_htab
=
12708 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12709 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12710 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12711 uint32_t hash
= signature
& mask
;
12712 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12715 struct dwo_unit find_dwo_cu
;
12717 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12718 find_dwo_cu
.signature
= signature
;
12719 slot
= htab_find_slot (is_debug_types
12720 ? dwp_file
->loaded_tus
12721 : dwp_file
->loaded_cus
,
12722 &find_dwo_cu
, INSERT
);
12725 return (struct dwo_unit
*) *slot
;
12727 /* Use a for loop so that we don't loop forever on bad debug info. */
12728 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12730 ULONGEST signature_in_table
;
12732 signature_in_table
=
12733 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12734 if (signature_in_table
== signature
)
12736 uint32_t unit_index
=
12737 read_4_bytes (dbfd
,
12738 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12740 if (dwp_file
->version
== 1)
12742 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12743 dwp_file
, unit_index
,
12744 comp_dir
, signature
,
12749 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12750 dwp_file
, unit_index
,
12751 comp_dir
, signature
,
12754 return (struct dwo_unit
*) *slot
;
12756 if (signature_in_table
== 0)
12758 hash
= (hash
+ hash2
) & mask
;
12761 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12762 " [in module %s]"),
12766 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12767 Open the file specified by FILE_NAME and hand it off to BFD for
12768 preliminary analysis. Return a newly initialized bfd *, which
12769 includes a canonicalized copy of FILE_NAME.
12770 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12771 SEARCH_CWD is true if the current directory is to be searched.
12772 It will be searched before debug-file-directory.
12773 If successful, the file is added to the bfd include table of the
12774 objfile's bfd (see gdb_bfd_record_inclusion).
12775 If unable to find/open the file, return NULL.
12776 NOTE: This function is derived from symfile_bfd_open. */
12778 static gdb_bfd_ref_ptr
12779 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12780 const char *file_name
, int is_dwp
, int search_cwd
)
12783 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12784 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12785 to debug_file_directory. */
12786 const char *search_path
;
12787 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12789 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12792 if (*debug_file_directory
!= '\0')
12794 search_path_holder
.reset (concat (".", dirname_separator_string
,
12795 debug_file_directory
,
12797 search_path
= search_path_holder
.get ();
12803 search_path
= debug_file_directory
;
12805 openp_flags flags
= OPF_RETURN_REALPATH
;
12807 flags
|= OPF_SEARCH_IN_PATH
;
12809 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12810 desc
= openp (search_path
, flags
, file_name
,
12811 O_RDONLY
| O_BINARY
, &absolute_name
);
12815 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12817 if (sym_bfd
== NULL
)
12819 bfd_set_cacheable (sym_bfd
.get (), 1);
12821 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12824 /* Success. Record the bfd as having been included by the objfile's bfd.
12825 This is important because things like demangled_names_hash lives in the
12826 objfile's per_bfd space and may have references to things like symbol
12827 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12828 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12833 /* Try to open DWO file FILE_NAME.
12834 COMP_DIR is the DW_AT_comp_dir attribute.
12835 The result is the bfd handle of the file.
12836 If there is a problem finding or opening the file, return NULL.
12837 Upon success, the canonicalized path of the file is stored in the bfd,
12838 same as symfile_bfd_open. */
12840 static gdb_bfd_ref_ptr
12841 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12842 const char *file_name
, const char *comp_dir
)
12844 if (IS_ABSOLUTE_PATH (file_name
))
12845 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12846 0 /*is_dwp*/, 0 /*search_cwd*/);
12848 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12850 if (comp_dir
!= NULL
)
12852 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12853 file_name
, (char *) NULL
);
12855 /* NOTE: If comp_dir is a relative path, this will also try the
12856 search path, which seems useful. */
12857 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12860 1 /*search_cwd*/));
12861 xfree (path_to_try
);
12866 /* That didn't work, try debug-file-directory, which, despite its name,
12867 is a list of paths. */
12869 if (*debug_file_directory
== '\0')
12872 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12873 0 /*is_dwp*/, 1 /*search_cwd*/);
12876 /* This function is mapped across the sections and remembers the offset and
12877 size of each of the DWO debugging sections we are interested in. */
12880 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12882 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12883 const struct dwop_section_names
*names
= &dwop_section_names
;
12885 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12887 dwo_sections
->abbrev
.s
.section
= sectp
;
12888 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12890 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12892 dwo_sections
->info
.s
.section
= sectp
;
12893 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12895 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12897 dwo_sections
->line
.s
.section
= sectp
;
12898 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12900 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12902 dwo_sections
->loc
.s
.section
= sectp
;
12903 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
12905 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12907 dwo_sections
->macinfo
.s
.section
= sectp
;
12908 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12910 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12912 dwo_sections
->macro
.s
.section
= sectp
;
12913 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
12915 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12917 dwo_sections
->str
.s
.section
= sectp
;
12918 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
12920 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12922 dwo_sections
->str_offsets
.s
.section
= sectp
;
12923 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12925 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12927 struct dwarf2_section_info type_section
;
12929 memset (&type_section
, 0, sizeof (type_section
));
12930 type_section
.s
.section
= sectp
;
12931 type_section
.size
= bfd_get_section_size (sectp
);
12932 dwo_sections
->types
.push_back (type_section
);
12936 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12937 by PER_CU. This is for the non-DWP case.
12938 The result is NULL if DWO_NAME can't be found. */
12940 static struct dwo_file
*
12941 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12942 const char *dwo_name
, const char *comp_dir
)
12944 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12946 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12949 if (dwarf_read_debug
)
12950 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12954 dwo_file_up
dwo_file (new struct dwo_file
);
12955 dwo_file
->dwo_name
= dwo_name
;
12956 dwo_file
->comp_dir
= comp_dir
;
12957 dwo_file
->dbfd
= std::move (dbfd
);
12959 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12960 &dwo_file
->sections
);
12962 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
12965 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12966 dwo_file
->sections
.types
, dwo_file
->tus
);
12968 if (dwarf_read_debug
)
12969 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12971 return dwo_file
.release ();
12974 /* This function is mapped across the sections and remembers the offset and
12975 size of each of the DWP debugging sections common to version 1 and 2 that
12976 we are interested in. */
12979 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12980 void *dwp_file_ptr
)
12982 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12983 const struct dwop_section_names
*names
= &dwop_section_names
;
12984 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12986 /* Record the ELF section number for later lookup: this is what the
12987 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12988 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12989 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12991 /* Look for specific sections that we need. */
12992 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12994 dwp_file
->sections
.str
.s
.section
= sectp
;
12995 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
12997 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12999 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
13000 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
13002 else if (section_is_p (sectp
->name
, &names
->tu_index
))
13004 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
13005 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
13009 /* This function is mapped across the sections and remembers the offset and
13010 size of each of the DWP version 2 debugging sections that we are interested
13011 in. This is split into a separate function because we don't know if we
13012 have version 1 or 2 until we parse the cu_index/tu_index sections. */
13015 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
13017 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13018 const struct dwop_section_names
*names
= &dwop_section_names
;
13019 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13021 /* Record the ELF section number for later lookup: this is what the
13022 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13023 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13024 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13026 /* Look for specific sections that we need. */
13027 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
13029 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
13030 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
13032 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
13034 dwp_file
->sections
.info
.s
.section
= sectp
;
13035 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
13037 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
13039 dwp_file
->sections
.line
.s
.section
= sectp
;
13040 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
13042 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
13044 dwp_file
->sections
.loc
.s
.section
= sectp
;
13045 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
13047 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
13049 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
13050 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
13052 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13054 dwp_file
->sections
.macro
.s
.section
= sectp
;
13055 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
13057 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13059 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13060 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
13062 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13064 dwp_file
->sections
.types
.s
.section
= sectp
;
13065 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
13069 /* Hash function for dwp_file loaded CUs/TUs. */
13072 hash_dwp_loaded_cutus (const void *item
)
13074 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13076 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13077 return dwo_unit
->signature
;
13080 /* Equality function for dwp_file loaded CUs/TUs. */
13083 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13085 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13086 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13088 return dua
->signature
== dub
->signature
;
13091 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13094 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13096 return htab_create_alloc_ex (3,
13097 hash_dwp_loaded_cutus
,
13098 eq_dwp_loaded_cutus
,
13100 &objfile
->objfile_obstack
,
13101 hashtab_obstack_allocate
,
13102 dummy_obstack_deallocate
);
13105 /* Try to open DWP file FILE_NAME.
13106 The result is the bfd handle of the file.
13107 If there is a problem finding or opening the file, return NULL.
13108 Upon success, the canonicalized path of the file is stored in the bfd,
13109 same as symfile_bfd_open. */
13111 static gdb_bfd_ref_ptr
13112 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13113 const char *file_name
)
13115 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13117 1 /*search_cwd*/));
13121 /* Work around upstream bug 15652.
13122 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13123 [Whether that's a "bug" is debatable, but it is getting in our way.]
13124 We have no real idea where the dwp file is, because gdb's realpath-ing
13125 of the executable's path may have discarded the needed info.
13126 [IWBN if the dwp file name was recorded in the executable, akin to
13127 .gnu_debuglink, but that doesn't exist yet.]
13128 Strip the directory from FILE_NAME and search again. */
13129 if (*debug_file_directory
!= '\0')
13131 /* Don't implicitly search the current directory here.
13132 If the user wants to search "." to handle this case,
13133 it must be added to debug-file-directory. */
13134 return try_open_dwop_file (dwarf2_per_objfile
,
13135 lbasename (file_name
), 1 /*is_dwp*/,
13142 /* Initialize the use of the DWP file for the current objfile.
13143 By convention the name of the DWP file is ${objfile}.dwp.
13144 The result is NULL if it can't be found. */
13146 static std::unique_ptr
<struct dwp_file
>
13147 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13149 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13151 /* Try to find first .dwp for the binary file before any symbolic links
13154 /* If the objfile is a debug file, find the name of the real binary
13155 file and get the name of dwp file from there. */
13156 std::string dwp_name
;
13157 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13159 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13160 const char *backlink_basename
= lbasename (backlink
->original_name
);
13162 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13165 dwp_name
= objfile
->original_name
;
13167 dwp_name
+= ".dwp";
13169 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13171 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13173 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13174 dwp_name
= objfile_name (objfile
);
13175 dwp_name
+= ".dwp";
13176 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13181 if (dwarf_read_debug
)
13182 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13183 return std::unique_ptr
<dwp_file
> ();
13186 const char *name
= bfd_get_filename (dbfd
.get ());
13187 std::unique_ptr
<struct dwp_file
> dwp_file
13188 (new struct dwp_file (name
, std::move (dbfd
)));
13190 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
13191 dwp_file
->elf_sections
=
13192 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13193 dwp_file
->num_sections
, asection
*);
13195 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13196 dwarf2_locate_common_dwp_sections
,
13199 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13202 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13205 /* The DWP file version is stored in the hash table. Oh well. */
13206 if (dwp_file
->cus
&& dwp_file
->tus
13207 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13209 /* Technically speaking, we should try to limp along, but this is
13210 pretty bizarre. We use pulongest here because that's the established
13211 portability solution (e.g, we cannot use %u for uint32_t). */
13212 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13213 " TU version %s [in DWP file %s]"),
13214 pulongest (dwp_file
->cus
->version
),
13215 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13219 dwp_file
->version
= dwp_file
->cus
->version
;
13220 else if (dwp_file
->tus
)
13221 dwp_file
->version
= dwp_file
->tus
->version
;
13223 dwp_file
->version
= 2;
13225 if (dwp_file
->version
== 2)
13226 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13227 dwarf2_locate_v2_dwp_sections
,
13230 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13231 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13233 if (dwarf_read_debug
)
13235 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13236 fprintf_unfiltered (gdb_stdlog
,
13237 " %s CUs, %s TUs\n",
13238 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13239 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13245 /* Wrapper around open_and_init_dwp_file, only open it once. */
13247 static struct dwp_file
*
13248 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13250 if (! dwarf2_per_objfile
->dwp_checked
)
13252 dwarf2_per_objfile
->dwp_file
13253 = open_and_init_dwp_file (dwarf2_per_objfile
);
13254 dwarf2_per_objfile
->dwp_checked
= 1;
13256 return dwarf2_per_objfile
->dwp_file
.get ();
13259 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13260 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13261 or in the DWP file for the objfile, referenced by THIS_UNIT.
13262 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13263 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13265 This is called, for example, when wanting to read a variable with a
13266 complex location. Therefore we don't want to do file i/o for every call.
13267 Therefore we don't want to look for a DWO file on every call.
13268 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13269 then we check if we've already seen DWO_NAME, and only THEN do we check
13272 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13273 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13275 static struct dwo_unit
*
13276 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13277 const char *dwo_name
, const char *comp_dir
,
13278 ULONGEST signature
, int is_debug_types
)
13280 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13281 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13282 const char *kind
= is_debug_types
? "TU" : "CU";
13283 void **dwo_file_slot
;
13284 struct dwo_file
*dwo_file
;
13285 struct dwp_file
*dwp_file
;
13287 /* First see if there's a DWP file.
13288 If we have a DWP file but didn't find the DWO inside it, don't
13289 look for the original DWO file. It makes gdb behave differently
13290 depending on whether one is debugging in the build tree. */
13292 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13293 if (dwp_file
!= NULL
)
13295 const struct dwp_hash_table
*dwp_htab
=
13296 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13298 if (dwp_htab
!= NULL
)
13300 struct dwo_unit
*dwo_cutu
=
13301 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13302 signature
, is_debug_types
);
13304 if (dwo_cutu
!= NULL
)
13306 if (dwarf_read_debug
)
13308 fprintf_unfiltered (gdb_stdlog
,
13309 "Virtual DWO %s %s found: @%s\n",
13310 kind
, hex_string (signature
),
13311 host_address_to_string (dwo_cutu
));
13319 /* No DWP file, look for the DWO file. */
13321 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13322 dwo_name
, comp_dir
);
13323 if (*dwo_file_slot
== NULL
)
13325 /* Read in the file and build a table of the CUs/TUs it contains. */
13326 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13328 /* NOTE: This will be NULL if unable to open the file. */
13329 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13331 if (dwo_file
!= NULL
)
13333 struct dwo_unit
*dwo_cutu
= NULL
;
13335 if (is_debug_types
&& dwo_file
->tus
)
13337 struct dwo_unit find_dwo_cutu
;
13339 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13340 find_dwo_cutu
.signature
= signature
;
13342 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13344 else if (!is_debug_types
&& dwo_file
->cus
)
13346 struct dwo_unit find_dwo_cutu
;
13348 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13349 find_dwo_cutu
.signature
= signature
;
13350 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13354 if (dwo_cutu
!= NULL
)
13356 if (dwarf_read_debug
)
13358 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13359 kind
, dwo_name
, hex_string (signature
),
13360 host_address_to_string (dwo_cutu
));
13367 /* We didn't find it. This could mean a dwo_id mismatch, or
13368 someone deleted the DWO/DWP file, or the search path isn't set up
13369 correctly to find the file. */
13371 if (dwarf_read_debug
)
13373 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13374 kind
, dwo_name
, hex_string (signature
));
13377 /* This is a warning and not a complaint because it can be caused by
13378 pilot error (e.g., user accidentally deleting the DWO). */
13380 /* Print the name of the DWP file if we looked there, helps the user
13381 better diagnose the problem. */
13382 std::string dwp_text
;
13384 if (dwp_file
!= NULL
)
13385 dwp_text
= string_printf (" [in DWP file %s]",
13386 lbasename (dwp_file
->name
));
13388 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13389 " [in module %s]"),
13390 kind
, dwo_name
, hex_string (signature
),
13392 this_unit
->is_debug_types
? "TU" : "CU",
13393 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13398 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13399 See lookup_dwo_cutu_unit for details. */
13401 static struct dwo_unit
*
13402 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13403 const char *dwo_name
, const char *comp_dir
,
13404 ULONGEST signature
)
13406 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13409 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13410 See lookup_dwo_cutu_unit for details. */
13412 static struct dwo_unit
*
13413 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13414 const char *dwo_name
, const char *comp_dir
)
13416 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13419 /* Traversal function for queue_and_load_all_dwo_tus. */
13422 queue_and_load_dwo_tu (void **slot
, void *info
)
13424 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13425 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13426 ULONGEST signature
= dwo_unit
->signature
;
13427 struct signatured_type
*sig_type
=
13428 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13430 if (sig_type
!= NULL
)
13432 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13434 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13435 a real dependency of PER_CU on SIG_TYPE. That is detected later
13436 while processing PER_CU. */
13437 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13438 load_full_type_unit (sig_cu
);
13439 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13445 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13446 The DWO may have the only definition of the type, though it may not be
13447 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13448 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13451 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13453 struct dwo_unit
*dwo_unit
;
13454 struct dwo_file
*dwo_file
;
13456 gdb_assert (!per_cu
->is_debug_types
);
13457 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13458 gdb_assert (per_cu
->cu
!= NULL
);
13460 dwo_unit
= per_cu
->cu
->dwo_unit
;
13461 gdb_assert (dwo_unit
!= NULL
);
13463 dwo_file
= dwo_unit
->dwo_file
;
13464 if (dwo_file
->tus
!= NULL
)
13465 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13468 /* Read in various DIEs. */
13470 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13471 Inherit only the children of the DW_AT_abstract_origin DIE not being
13472 already referenced by DW_AT_abstract_origin from the children of the
13476 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13478 struct die_info
*child_die
;
13479 sect_offset
*offsetp
;
13480 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13481 struct die_info
*origin_die
;
13482 /* Iterator of the ORIGIN_DIE children. */
13483 struct die_info
*origin_child_die
;
13484 struct attribute
*attr
;
13485 struct dwarf2_cu
*origin_cu
;
13486 struct pending
**origin_previous_list_in_scope
;
13488 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13492 /* Note that following die references may follow to a die in a
13496 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13498 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13500 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13501 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13503 if (die
->tag
!= origin_die
->tag
13504 && !(die
->tag
== DW_TAG_inlined_subroutine
13505 && origin_die
->tag
== DW_TAG_subprogram
))
13506 complaint (_("DIE %s and its abstract origin %s have different tags"),
13507 sect_offset_str (die
->sect_off
),
13508 sect_offset_str (origin_die
->sect_off
));
13510 std::vector
<sect_offset
> offsets
;
13512 for (child_die
= die
->child
;
13513 child_die
&& child_die
->tag
;
13514 child_die
= sibling_die (child_die
))
13516 struct die_info
*child_origin_die
;
13517 struct dwarf2_cu
*child_origin_cu
;
13519 /* We are trying to process concrete instance entries:
13520 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13521 it's not relevant to our analysis here. i.e. detecting DIEs that are
13522 present in the abstract instance but not referenced in the concrete
13524 if (child_die
->tag
== DW_TAG_call_site
13525 || child_die
->tag
== DW_TAG_GNU_call_site
)
13528 /* For each CHILD_DIE, find the corresponding child of
13529 ORIGIN_DIE. If there is more than one layer of
13530 DW_AT_abstract_origin, follow them all; there shouldn't be,
13531 but GCC versions at least through 4.4 generate this (GCC PR
13533 child_origin_die
= child_die
;
13534 child_origin_cu
= cu
;
13537 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13541 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13545 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13546 counterpart may exist. */
13547 if (child_origin_die
!= child_die
)
13549 if (child_die
->tag
!= child_origin_die
->tag
13550 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13551 && child_origin_die
->tag
== DW_TAG_subprogram
))
13552 complaint (_("Child DIE %s and its abstract origin %s have "
13554 sect_offset_str (child_die
->sect_off
),
13555 sect_offset_str (child_origin_die
->sect_off
));
13556 if (child_origin_die
->parent
!= origin_die
)
13557 complaint (_("Child DIE %s and its abstract origin %s have "
13558 "different parents"),
13559 sect_offset_str (child_die
->sect_off
),
13560 sect_offset_str (child_origin_die
->sect_off
));
13562 offsets
.push_back (child_origin_die
->sect_off
);
13565 std::sort (offsets
.begin (), offsets
.end ());
13566 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13567 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13568 if (offsetp
[-1] == *offsetp
)
13569 complaint (_("Multiple children of DIE %s refer "
13570 "to DIE %s as their abstract origin"),
13571 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13573 offsetp
= offsets
.data ();
13574 origin_child_die
= origin_die
->child
;
13575 while (origin_child_die
&& origin_child_die
->tag
)
13577 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13578 while (offsetp
< offsets_end
13579 && *offsetp
< origin_child_die
->sect_off
)
13581 if (offsetp
>= offsets_end
13582 || *offsetp
> origin_child_die
->sect_off
)
13584 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13585 Check whether we're already processing ORIGIN_CHILD_DIE.
13586 This can happen with mutually referenced abstract_origins.
13588 if (!origin_child_die
->in_process
)
13589 process_die (origin_child_die
, origin_cu
);
13591 origin_child_die
= sibling_die (origin_child_die
);
13593 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13597 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13599 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13600 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13601 struct context_stack
*newobj
;
13604 struct die_info
*child_die
;
13605 struct attribute
*attr
, *call_line
, *call_file
;
13607 CORE_ADDR baseaddr
;
13608 struct block
*block
;
13609 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13610 std::vector
<struct symbol
*> template_args
;
13611 struct template_symbol
*templ_func
= NULL
;
13615 /* If we do not have call site information, we can't show the
13616 caller of this inlined function. That's too confusing, so
13617 only use the scope for local variables. */
13618 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13619 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13620 if (call_line
== NULL
|| call_file
== NULL
)
13622 read_lexical_block_scope (die
, cu
);
13627 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13629 name
= dwarf2_name (die
, cu
);
13631 /* Ignore functions with missing or empty names. These are actually
13632 illegal according to the DWARF standard. */
13635 complaint (_("missing name for subprogram DIE at %s"),
13636 sect_offset_str (die
->sect_off
));
13640 /* Ignore functions with missing or invalid low and high pc attributes. */
13641 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13642 <= PC_BOUNDS_INVALID
)
13644 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13645 if (!attr
|| !DW_UNSND (attr
))
13646 complaint (_("cannot get low and high bounds "
13647 "for subprogram DIE at %s"),
13648 sect_offset_str (die
->sect_off
));
13652 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13653 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13655 /* If we have any template arguments, then we must allocate a
13656 different sort of symbol. */
13657 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13659 if (child_die
->tag
== DW_TAG_template_type_param
13660 || child_die
->tag
== DW_TAG_template_value_param
)
13662 templ_func
= allocate_template_symbol (objfile
);
13663 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13668 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13669 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13670 (struct symbol
*) templ_func
);
13672 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13673 set_objfile_main_name (objfile
, SYMBOL_LINKAGE_NAME (newobj
->name
),
13676 /* If there is a location expression for DW_AT_frame_base, record
13678 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13680 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13682 /* If there is a location for the static link, record it. */
13683 newobj
->static_link
= NULL
;
13684 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13687 newobj
->static_link
13688 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13689 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
13692 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13694 if (die
->child
!= NULL
)
13696 child_die
= die
->child
;
13697 while (child_die
&& child_die
->tag
)
13699 if (child_die
->tag
== DW_TAG_template_type_param
13700 || child_die
->tag
== DW_TAG_template_value_param
)
13702 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13705 template_args
.push_back (arg
);
13708 process_die (child_die
, cu
);
13709 child_die
= sibling_die (child_die
);
13713 inherit_abstract_dies (die
, cu
);
13715 /* If we have a DW_AT_specification, we might need to import using
13716 directives from the context of the specification DIE. See the
13717 comment in determine_prefix. */
13718 if (cu
->language
== language_cplus
13719 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13721 struct dwarf2_cu
*spec_cu
= cu
;
13722 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13726 child_die
= spec_die
->child
;
13727 while (child_die
&& child_die
->tag
)
13729 if (child_die
->tag
== DW_TAG_imported_module
)
13730 process_die (child_die
, spec_cu
);
13731 child_die
= sibling_die (child_die
);
13734 /* In some cases, GCC generates specification DIEs that
13735 themselves contain DW_AT_specification attributes. */
13736 spec_die
= die_specification (spec_die
, &spec_cu
);
13740 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13741 /* Make a block for the local symbols within. */
13742 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13743 cstk
.static_link
, lowpc
, highpc
);
13745 /* For C++, set the block's scope. */
13746 if ((cu
->language
== language_cplus
13747 || cu
->language
== language_fortran
13748 || cu
->language
== language_d
13749 || cu
->language
== language_rust
)
13750 && cu
->processing_has_namespace_info
)
13751 block_set_scope (block
, determine_prefix (die
, cu
),
13752 &objfile
->objfile_obstack
);
13754 /* If we have address ranges, record them. */
13755 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13757 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13759 /* Attach template arguments to function. */
13760 if (!template_args
.empty ())
13762 gdb_assert (templ_func
!= NULL
);
13764 templ_func
->n_template_arguments
= template_args
.size ();
13765 templ_func
->template_arguments
13766 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13767 templ_func
->n_template_arguments
);
13768 memcpy (templ_func
->template_arguments
,
13769 template_args
.data (),
13770 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13772 /* Make sure that the symtab is set on the new symbols. Even
13773 though they don't appear in this symtab directly, other parts
13774 of gdb assume that symbols do, and this is reasonably
13776 for (symbol
*sym
: template_args
)
13777 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13780 /* In C++, we can have functions nested inside functions (e.g., when
13781 a function declares a class that has methods). This means that
13782 when we finish processing a function scope, we may need to go
13783 back to building a containing block's symbol lists. */
13784 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13785 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13787 /* If we've finished processing a top-level function, subsequent
13788 symbols go in the file symbol list. */
13789 if (cu
->get_builder ()->outermost_context_p ())
13790 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13793 /* Process all the DIES contained within a lexical block scope. Start
13794 a new scope, process the dies, and then close the scope. */
13797 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13799 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13800 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13801 CORE_ADDR lowpc
, highpc
;
13802 struct die_info
*child_die
;
13803 CORE_ADDR baseaddr
;
13805 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13807 /* Ignore blocks with missing or invalid low and high pc attributes. */
13808 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13809 as multiple lexical blocks? Handling children in a sane way would
13810 be nasty. Might be easier to properly extend generic blocks to
13811 describe ranges. */
13812 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13814 case PC_BOUNDS_NOT_PRESENT
:
13815 /* DW_TAG_lexical_block has no attributes, process its children as if
13816 there was no wrapping by that DW_TAG_lexical_block.
13817 GCC does no longer produces such DWARF since GCC r224161. */
13818 for (child_die
= die
->child
;
13819 child_die
!= NULL
&& child_die
->tag
;
13820 child_die
= sibling_die (child_die
))
13821 process_die (child_die
, cu
);
13823 case PC_BOUNDS_INVALID
:
13826 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13827 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13829 cu
->get_builder ()->push_context (0, lowpc
);
13830 if (die
->child
!= NULL
)
13832 child_die
= die
->child
;
13833 while (child_die
&& child_die
->tag
)
13835 process_die (child_die
, cu
);
13836 child_die
= sibling_die (child_die
);
13839 inherit_abstract_dies (die
, cu
);
13840 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13842 if (*cu
->get_builder ()->get_local_symbols () != NULL
13843 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13845 struct block
*block
13846 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13847 cstk
.start_addr
, highpc
);
13849 /* Note that recording ranges after traversing children, as we
13850 do here, means that recording a parent's ranges entails
13851 walking across all its children's ranges as they appear in
13852 the address map, which is quadratic behavior.
13854 It would be nicer to record the parent's ranges before
13855 traversing its children, simply overriding whatever you find
13856 there. But since we don't even decide whether to create a
13857 block until after we've traversed its children, that's hard
13859 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13861 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13862 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13865 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13868 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13870 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13871 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13872 CORE_ADDR pc
, baseaddr
;
13873 struct attribute
*attr
;
13874 struct call_site
*call_site
, call_site_local
;
13877 struct die_info
*child_die
;
13879 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13881 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13884 /* This was a pre-DWARF-5 GNU extension alias
13885 for DW_AT_call_return_pc. */
13886 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13890 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13891 "DIE %s [in module %s]"),
13892 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13895 pc
= attr_value_as_address (attr
) + baseaddr
;
13896 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13898 if (cu
->call_site_htab
== NULL
)
13899 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13900 NULL
, &objfile
->objfile_obstack
,
13901 hashtab_obstack_allocate
, NULL
);
13902 call_site_local
.pc
= pc
;
13903 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13906 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13907 "DIE %s [in module %s]"),
13908 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13909 objfile_name (objfile
));
13913 /* Count parameters at the caller. */
13916 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13917 child_die
= sibling_die (child_die
))
13919 if (child_die
->tag
!= DW_TAG_call_site_parameter
13920 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13922 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13923 "DW_TAG_call_site child DIE %s [in module %s]"),
13924 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13925 objfile_name (objfile
));
13933 = ((struct call_site
*)
13934 obstack_alloc (&objfile
->objfile_obstack
,
13935 sizeof (*call_site
)
13936 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13938 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13939 call_site
->pc
= pc
;
13941 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13942 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13944 struct die_info
*func_die
;
13946 /* Skip also over DW_TAG_inlined_subroutine. */
13947 for (func_die
= die
->parent
;
13948 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13949 && func_die
->tag
!= DW_TAG_subroutine_type
;
13950 func_die
= func_die
->parent
);
13952 /* DW_AT_call_all_calls is a superset
13953 of DW_AT_call_all_tail_calls. */
13955 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13956 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13957 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13958 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13960 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13961 not complete. But keep CALL_SITE for look ups via call_site_htab,
13962 both the initial caller containing the real return address PC and
13963 the final callee containing the current PC of a chain of tail
13964 calls do not need to have the tail call list complete. But any
13965 function candidate for a virtual tail call frame searched via
13966 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13967 determined unambiguously. */
13971 struct type
*func_type
= NULL
;
13974 func_type
= get_die_type (func_die
, cu
);
13975 if (func_type
!= NULL
)
13977 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13979 /* Enlist this call site to the function. */
13980 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13981 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13984 complaint (_("Cannot find function owning DW_TAG_call_site "
13985 "DIE %s [in module %s]"),
13986 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13990 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13992 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13994 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13997 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13998 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14000 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
14001 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
14002 /* Keep NULL DWARF_BLOCK. */;
14003 else if (attr_form_is_block (attr
))
14005 struct dwarf2_locexpr_baton
*dlbaton
;
14007 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14008 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14009 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14010 dlbaton
->per_cu
= cu
->per_cu
;
14012 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
14014 else if (attr_form_is_ref (attr
))
14016 struct dwarf2_cu
*target_cu
= cu
;
14017 struct die_info
*target_die
;
14019 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14020 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
14021 if (die_is_declaration (target_die
, target_cu
))
14023 const char *target_physname
;
14025 /* Prefer the mangled name; otherwise compute the demangled one. */
14026 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14027 if (target_physname
== NULL
)
14028 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14029 if (target_physname
== NULL
)
14030 complaint (_("DW_AT_call_target target DIE has invalid "
14031 "physname, for referencing DIE %s [in module %s]"),
14032 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14034 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14040 /* DW_AT_entry_pc should be preferred. */
14041 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14042 <= PC_BOUNDS_INVALID
)
14043 complaint (_("DW_AT_call_target target DIE has invalid "
14044 "low pc, for referencing DIE %s [in module %s]"),
14045 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14048 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14049 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14054 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
14055 "block nor reference, for DIE %s [in module %s]"),
14056 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14058 call_site
->per_cu
= cu
->per_cu
;
14060 for (child_die
= die
->child
;
14061 child_die
&& child_die
->tag
;
14062 child_die
= sibling_die (child_die
))
14064 struct call_site_parameter
*parameter
;
14065 struct attribute
*loc
, *origin
;
14067 if (child_die
->tag
!= DW_TAG_call_site_parameter
14068 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14070 /* Already printed the complaint above. */
14074 gdb_assert (call_site
->parameter_count
< nparams
);
14075 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14077 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14078 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14079 register is contained in DW_AT_call_value. */
14081 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14082 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14083 if (origin
== NULL
)
14085 /* This was a pre-DWARF-5 GNU extension alias
14086 for DW_AT_call_parameter. */
14087 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14089 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14091 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14093 sect_offset sect_off
14094 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14095 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14097 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14098 binding can be done only inside one CU. Such referenced DIE
14099 therefore cannot be even moved to DW_TAG_partial_unit. */
14100 complaint (_("DW_AT_call_parameter offset is not in CU for "
14101 "DW_TAG_call_site child DIE %s [in module %s]"),
14102 sect_offset_str (child_die
->sect_off
),
14103 objfile_name (objfile
));
14106 parameter
->u
.param_cu_off
14107 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14109 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14111 complaint (_("No DW_FORM_block* DW_AT_location for "
14112 "DW_TAG_call_site child DIE %s [in module %s]"),
14113 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14118 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14119 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14120 if (parameter
->u
.dwarf_reg
!= -1)
14121 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14122 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14123 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14124 ¶meter
->u
.fb_offset
))
14125 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14128 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
14129 "for DW_FORM_block* DW_AT_location is supported for "
14130 "DW_TAG_call_site child DIE %s "
14132 sect_offset_str (child_die
->sect_off
),
14133 objfile_name (objfile
));
14138 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14140 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14141 if (!attr_form_is_block (attr
))
14143 complaint (_("No DW_FORM_block* DW_AT_call_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
->value
= DW_BLOCK (attr
)->data
;
14150 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14152 /* Parameters are not pre-cleared by memset above. */
14153 parameter
->data_value
= NULL
;
14154 parameter
->data_value_size
= 0;
14155 call_site
->parameter_count
++;
14157 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14159 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14162 if (!attr_form_is_block (attr
))
14163 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
14164 "DW_TAG_call_site child DIE %s [in module %s]"),
14165 sect_offset_str (child_die
->sect_off
),
14166 objfile_name (objfile
));
14169 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14170 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14176 /* Helper function for read_variable. If DIE represents a virtual
14177 table, then return the type of the concrete object that is
14178 associated with the virtual table. Otherwise, return NULL. */
14180 static struct type
*
14181 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14183 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14187 /* Find the type DIE. */
14188 struct die_info
*type_die
= NULL
;
14189 struct dwarf2_cu
*type_cu
= cu
;
14191 if (attr_form_is_ref (attr
))
14192 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14193 if (type_die
== NULL
)
14196 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14198 return die_containing_type (type_die
, type_cu
);
14201 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14204 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14206 struct rust_vtable_symbol
*storage
= NULL
;
14208 if (cu
->language
== language_rust
)
14210 struct type
*containing_type
= rust_containing_type (die
, cu
);
14212 if (containing_type
!= NULL
)
14214 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14216 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14217 struct rust_vtable_symbol
);
14218 initialize_objfile_symbol (storage
);
14219 storage
->concrete_type
= containing_type
;
14220 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14224 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
14225 struct attribute
*abstract_origin
14226 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14227 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
14228 if (res
== NULL
&& loc
&& abstract_origin
)
14230 /* We have a variable without a name, but with a location and an abstract
14231 origin. This may be a concrete instance of an abstract variable
14232 referenced from an DW_OP_GNU_variable_value, so save it to find it back
14234 struct dwarf2_cu
*origin_cu
= cu
;
14235 struct die_info
*origin_die
14236 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
14237 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
14238 dpo
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
14242 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14243 reading .debug_rnglists.
14244 Callback's type should be:
14245 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14246 Return true if the attributes are present and valid, otherwise,
14249 template <typename Callback
>
14251 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14252 Callback
&&callback
)
14254 struct dwarf2_per_objfile
*dwarf2_per_objfile
14255 = cu
->per_cu
->dwarf2_per_objfile
;
14256 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14257 bfd
*obfd
= objfile
->obfd
;
14258 /* Base address selection entry. */
14261 const gdb_byte
*buffer
;
14262 CORE_ADDR baseaddr
;
14263 bool overflow
= false;
14265 found_base
= cu
->base_known
;
14266 base
= cu
->base_address
;
14268 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14269 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14271 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14275 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14277 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14281 /* Initialize it due to a false compiler warning. */
14282 CORE_ADDR range_beginning
= 0, range_end
= 0;
14283 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14284 + dwarf2_per_objfile
->rnglists
.size
);
14285 unsigned int bytes_read
;
14287 if (buffer
== buf_end
)
14292 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14295 case DW_RLE_end_of_list
:
14297 case DW_RLE_base_address
:
14298 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14303 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14305 buffer
+= bytes_read
;
14307 case DW_RLE_start_length
:
14308 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14313 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14314 buffer
+= bytes_read
;
14315 range_end
= (range_beginning
14316 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14317 buffer
+= bytes_read
;
14318 if (buffer
> buf_end
)
14324 case DW_RLE_offset_pair
:
14325 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14326 buffer
+= bytes_read
;
14327 if (buffer
> buf_end
)
14332 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14333 buffer
+= bytes_read
;
14334 if (buffer
> buf_end
)
14340 case DW_RLE_start_end
:
14341 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14346 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14347 buffer
+= bytes_read
;
14348 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14349 buffer
+= bytes_read
;
14352 complaint (_("Invalid .debug_rnglists data (no base address)"));
14355 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14357 if (rlet
== DW_RLE_base_address
)
14362 /* We have no valid base address for the ranges
14364 complaint (_("Invalid .debug_rnglists data (no base address)"));
14368 if (range_beginning
> range_end
)
14370 /* Inverted range entries are invalid. */
14371 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14375 /* Empty range entries have no effect. */
14376 if (range_beginning
== range_end
)
14379 range_beginning
+= base
;
14382 /* A not-uncommon case of bad debug info.
14383 Don't pollute the addrmap with bad data. */
14384 if (range_beginning
+ baseaddr
== 0
14385 && !dwarf2_per_objfile
->has_section_at_zero
)
14387 complaint (_(".debug_rnglists entry has start address of zero"
14388 " [in module %s]"), objfile_name (objfile
));
14392 callback (range_beginning
, range_end
);
14397 complaint (_("Offset %d is not terminated "
14398 "for DW_AT_ranges attribute"),
14406 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14407 Callback's type should be:
14408 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14409 Return 1 if the attributes are present and valid, otherwise, return 0. */
14411 template <typename Callback
>
14413 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14414 Callback
&&callback
)
14416 struct dwarf2_per_objfile
*dwarf2_per_objfile
14417 = cu
->per_cu
->dwarf2_per_objfile
;
14418 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14419 struct comp_unit_head
*cu_header
= &cu
->header
;
14420 bfd
*obfd
= objfile
->obfd
;
14421 unsigned int addr_size
= cu_header
->addr_size
;
14422 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14423 /* Base address selection entry. */
14426 unsigned int dummy
;
14427 const gdb_byte
*buffer
;
14428 CORE_ADDR baseaddr
;
14430 if (cu_header
->version
>= 5)
14431 return dwarf2_rnglists_process (offset
, cu
, callback
);
14433 found_base
= cu
->base_known
;
14434 base
= cu
->base_address
;
14436 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14437 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14439 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14443 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14445 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14449 CORE_ADDR range_beginning
, range_end
;
14451 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14452 buffer
+= addr_size
;
14453 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14454 buffer
+= addr_size
;
14455 offset
+= 2 * addr_size
;
14457 /* An end of list marker is a pair of zero addresses. */
14458 if (range_beginning
== 0 && range_end
== 0)
14459 /* Found the end of list entry. */
14462 /* Each base address selection entry is a pair of 2 values.
14463 The first is the largest possible address, the second is
14464 the base address. Check for a base address here. */
14465 if ((range_beginning
& mask
) == mask
)
14467 /* If we found the largest possible address, then we already
14468 have the base address in range_end. */
14476 /* We have no valid base address for the ranges
14478 complaint (_("Invalid .debug_ranges data (no base address)"));
14482 if (range_beginning
> range_end
)
14484 /* Inverted range entries are invalid. */
14485 complaint (_("Invalid .debug_ranges data (inverted range)"));
14489 /* Empty range entries have no effect. */
14490 if (range_beginning
== range_end
)
14493 range_beginning
+= base
;
14496 /* A not-uncommon case of bad debug info.
14497 Don't pollute the addrmap with bad data. */
14498 if (range_beginning
+ baseaddr
== 0
14499 && !dwarf2_per_objfile
->has_section_at_zero
)
14501 complaint (_(".debug_ranges entry has start address of zero"
14502 " [in module %s]"), objfile_name (objfile
));
14506 callback (range_beginning
, range_end
);
14512 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14513 Return 1 if the attributes are present and valid, otherwise, return 0.
14514 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14517 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14518 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14519 struct partial_symtab
*ranges_pst
)
14521 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14522 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14523 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14524 SECT_OFF_TEXT (objfile
));
14527 CORE_ADDR high
= 0;
14530 retval
= dwarf2_ranges_process (offset
, cu
,
14531 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14533 if (ranges_pst
!= NULL
)
14538 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14539 range_beginning
+ baseaddr
)
14541 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14542 range_end
+ baseaddr
)
14544 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
14545 lowpc
, highpc
- 1, ranges_pst
);
14548 /* FIXME: This is recording everything as a low-high
14549 segment of consecutive addresses. We should have a
14550 data structure for discontiguous block ranges
14554 low
= range_beginning
;
14560 if (range_beginning
< low
)
14561 low
= range_beginning
;
14562 if (range_end
> high
)
14570 /* If the first entry is an end-of-list marker, the range
14571 describes an empty scope, i.e. no instructions. */
14577 *high_return
= high
;
14581 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14582 definition for the return value. *LOWPC and *HIGHPC are set iff
14583 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14585 static enum pc_bounds_kind
14586 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14587 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14588 struct partial_symtab
*pst
)
14590 struct dwarf2_per_objfile
*dwarf2_per_objfile
14591 = cu
->per_cu
->dwarf2_per_objfile
;
14592 struct attribute
*attr
;
14593 struct attribute
*attr_high
;
14595 CORE_ADDR high
= 0;
14596 enum pc_bounds_kind ret
;
14598 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14601 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14604 low
= attr_value_as_address (attr
);
14605 high
= attr_value_as_address (attr_high
);
14606 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14610 /* Found high w/o low attribute. */
14611 return PC_BOUNDS_INVALID
;
14613 /* Found consecutive range of addresses. */
14614 ret
= PC_BOUNDS_HIGH_LOW
;
14618 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14621 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14622 We take advantage of the fact that DW_AT_ranges does not appear
14623 in DW_TAG_compile_unit of DWO files. */
14624 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14625 unsigned int ranges_offset
= (DW_UNSND (attr
)
14626 + (need_ranges_base
14630 /* Value of the DW_AT_ranges attribute is the offset in the
14631 .debug_ranges section. */
14632 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14633 return PC_BOUNDS_INVALID
;
14634 /* Found discontinuous range of addresses. */
14635 ret
= PC_BOUNDS_RANGES
;
14638 return PC_BOUNDS_NOT_PRESENT
;
14641 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14643 return PC_BOUNDS_INVALID
;
14645 /* When using the GNU linker, .gnu.linkonce. sections are used to
14646 eliminate duplicate copies of functions and vtables and such.
14647 The linker will arbitrarily choose one and discard the others.
14648 The AT_*_pc values for such functions refer to local labels in
14649 these sections. If the section from that file was discarded, the
14650 labels are not in the output, so the relocs get a value of 0.
14651 If this is a discarded function, mark the pc bounds as invalid,
14652 so that GDB will ignore it. */
14653 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14654 return PC_BOUNDS_INVALID
;
14662 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14663 its low and high PC addresses. Do nothing if these addresses could not
14664 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14665 and HIGHPC to the high address if greater than HIGHPC. */
14668 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14669 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14670 struct dwarf2_cu
*cu
)
14672 CORE_ADDR low
, high
;
14673 struct die_info
*child
= die
->child
;
14675 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14677 *lowpc
= std::min (*lowpc
, low
);
14678 *highpc
= std::max (*highpc
, high
);
14681 /* If the language does not allow nested subprograms (either inside
14682 subprograms or lexical blocks), we're done. */
14683 if (cu
->language
!= language_ada
)
14686 /* Check all the children of the given DIE. If it contains nested
14687 subprograms, then check their pc bounds. Likewise, we need to
14688 check lexical blocks as well, as they may also contain subprogram
14690 while (child
&& child
->tag
)
14692 if (child
->tag
== DW_TAG_subprogram
14693 || child
->tag
== DW_TAG_lexical_block
)
14694 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14695 child
= sibling_die (child
);
14699 /* Get the low and high pc's represented by the scope DIE, and store
14700 them in *LOWPC and *HIGHPC. If the correct values can't be
14701 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14704 get_scope_pc_bounds (struct die_info
*die
,
14705 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14706 struct dwarf2_cu
*cu
)
14708 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14709 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14710 CORE_ADDR current_low
, current_high
;
14712 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14713 >= PC_BOUNDS_RANGES
)
14715 best_low
= current_low
;
14716 best_high
= current_high
;
14720 struct die_info
*child
= die
->child
;
14722 while (child
&& child
->tag
)
14724 switch (child
->tag
) {
14725 case DW_TAG_subprogram
:
14726 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14728 case DW_TAG_namespace
:
14729 case DW_TAG_module
:
14730 /* FIXME: carlton/2004-01-16: Should we do this for
14731 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14732 that current GCC's always emit the DIEs corresponding
14733 to definitions of methods of classes as children of a
14734 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14735 the DIEs giving the declarations, which could be
14736 anywhere). But I don't see any reason why the
14737 standards says that they have to be there. */
14738 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14740 if (current_low
!= ((CORE_ADDR
) -1))
14742 best_low
= std::min (best_low
, current_low
);
14743 best_high
= std::max (best_high
, current_high
);
14751 child
= sibling_die (child
);
14756 *highpc
= best_high
;
14759 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14763 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14764 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14766 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14767 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14768 struct attribute
*attr
;
14769 struct attribute
*attr_high
;
14771 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14774 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14777 CORE_ADDR low
= attr_value_as_address (attr
);
14778 CORE_ADDR high
= attr_value_as_address (attr_high
);
14780 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14783 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14784 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14785 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14789 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14792 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14793 We take advantage of the fact that DW_AT_ranges does not appear
14794 in DW_TAG_compile_unit of DWO files. */
14795 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14797 /* The value of the DW_AT_ranges attribute is the offset of the
14798 address range list in the .debug_ranges section. */
14799 unsigned long offset
= (DW_UNSND (attr
)
14800 + (need_ranges_base
? cu
->ranges_base
: 0));
14802 std::vector
<blockrange
> blockvec
;
14803 dwarf2_ranges_process (offset
, cu
,
14804 [&] (CORE_ADDR start
, CORE_ADDR end
)
14808 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14809 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14810 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14811 blockvec
.emplace_back (start
, end
);
14814 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14818 /* Check whether the producer field indicates either of GCC < 4.6, or the
14819 Intel C/C++ compiler, and cache the result in CU. */
14822 check_producer (struct dwarf2_cu
*cu
)
14826 if (cu
->producer
== NULL
)
14828 /* For unknown compilers expect their behavior is DWARF version
14831 GCC started to support .debug_types sections by -gdwarf-4 since
14832 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14833 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14834 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14835 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14837 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14839 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14840 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14842 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14844 cu
->producer_is_icc
= true;
14845 cu
->producer_is_icc_lt_14
= major
< 14;
14847 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14848 cu
->producer_is_codewarrior
= true;
14851 /* For other non-GCC compilers, expect their behavior is DWARF version
14855 cu
->checked_producer
= true;
14858 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14859 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14860 during 4.6.0 experimental. */
14863 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14865 if (!cu
->checked_producer
)
14866 check_producer (cu
);
14868 return cu
->producer_is_gxx_lt_4_6
;
14872 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14873 with incorrect is_stmt attributes. */
14876 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14878 if (!cu
->checked_producer
)
14879 check_producer (cu
);
14881 return cu
->producer_is_codewarrior
;
14884 /* Return the default accessibility type if it is not overriden by
14885 DW_AT_accessibility. */
14887 static enum dwarf_access_attribute
14888 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14890 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14892 /* The default DWARF 2 accessibility for members is public, the default
14893 accessibility for inheritance is private. */
14895 if (die
->tag
!= DW_TAG_inheritance
)
14896 return DW_ACCESS_public
;
14898 return DW_ACCESS_private
;
14902 /* DWARF 3+ defines the default accessibility a different way. The same
14903 rules apply now for DW_TAG_inheritance as for the members and it only
14904 depends on the container kind. */
14906 if (die
->parent
->tag
== DW_TAG_class_type
)
14907 return DW_ACCESS_private
;
14909 return DW_ACCESS_public
;
14913 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14914 offset. If the attribute was not found return 0, otherwise return
14915 1. If it was found but could not properly be handled, set *OFFSET
14919 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14922 struct attribute
*attr
;
14924 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14929 /* Note that we do not check for a section offset first here.
14930 This is because DW_AT_data_member_location is new in DWARF 4,
14931 so if we see it, we can assume that a constant form is really
14932 a constant and not a section offset. */
14933 if (attr_form_is_constant (attr
))
14934 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
14935 else if (attr_form_is_section_offset (attr
))
14936 dwarf2_complex_location_expr_complaint ();
14937 else if (attr_form_is_block (attr
))
14938 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14940 dwarf2_complex_location_expr_complaint ();
14948 /* Add an aggregate field to the field list. */
14951 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14952 struct dwarf2_cu
*cu
)
14954 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14955 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14956 struct nextfield
*new_field
;
14957 struct attribute
*attr
;
14959 const char *fieldname
= "";
14961 if (die
->tag
== DW_TAG_inheritance
)
14963 fip
->baseclasses
.emplace_back ();
14964 new_field
= &fip
->baseclasses
.back ();
14968 fip
->fields
.emplace_back ();
14969 new_field
= &fip
->fields
.back ();
14974 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14976 new_field
->accessibility
= DW_UNSND (attr
);
14978 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14979 if (new_field
->accessibility
!= DW_ACCESS_public
)
14980 fip
->non_public_fields
= 1;
14982 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14984 new_field
->virtuality
= DW_UNSND (attr
);
14986 new_field
->virtuality
= DW_VIRTUALITY_none
;
14988 fp
= &new_field
->field
;
14990 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14994 /* Data member other than a C++ static data member. */
14996 /* Get type of field. */
14997 fp
->type
= die_type (die
, cu
);
14999 SET_FIELD_BITPOS (*fp
, 0);
15001 /* Get bit size of field (zero if none). */
15002 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
15005 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
15009 FIELD_BITSIZE (*fp
) = 0;
15012 /* Get bit offset of field. */
15013 if (handle_data_member_location (die
, cu
, &offset
))
15014 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15015 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
15018 if (gdbarch_bits_big_endian (gdbarch
))
15020 /* For big endian bits, the DW_AT_bit_offset gives the
15021 additional bit offset from the MSB of the containing
15022 anonymous object to the MSB of the field. We don't
15023 have to do anything special since we don't need to
15024 know the size of the anonymous object. */
15025 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
15029 /* For little endian bits, compute the bit offset to the
15030 MSB of the anonymous object, subtract off the number of
15031 bits from the MSB of the field to the MSB of the
15032 object, and then subtract off the number of bits of
15033 the field itself. The result is the bit offset of
15034 the LSB of the field. */
15035 int anonymous_size
;
15036 int bit_offset
= DW_UNSND (attr
);
15038 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15041 /* The size of the anonymous object containing
15042 the bit field is explicit, so use the
15043 indicated size (in bytes). */
15044 anonymous_size
= DW_UNSND (attr
);
15048 /* The size of the anonymous object containing
15049 the bit field must be inferred from the type
15050 attribute of the data member containing the
15052 anonymous_size
= TYPE_LENGTH (fp
->type
);
15054 SET_FIELD_BITPOS (*fp
,
15055 (FIELD_BITPOS (*fp
)
15056 + anonymous_size
* bits_per_byte
15057 - bit_offset
- FIELD_BITSIZE (*fp
)));
15060 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15062 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15063 + dwarf2_get_attr_constant_value (attr
, 0)));
15065 /* Get name of field. */
15066 fieldname
= dwarf2_name (die
, cu
);
15067 if (fieldname
== NULL
)
15070 /* The name is already allocated along with this objfile, so we don't
15071 need to duplicate it for the type. */
15072 fp
->name
= fieldname
;
15074 /* Change accessibility for artificial fields (e.g. virtual table
15075 pointer or virtual base class pointer) to private. */
15076 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15078 FIELD_ARTIFICIAL (*fp
) = 1;
15079 new_field
->accessibility
= DW_ACCESS_private
;
15080 fip
->non_public_fields
= 1;
15083 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15085 /* C++ static member. */
15087 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15088 is a declaration, but all versions of G++ as of this writing
15089 (so through at least 3.2.1) incorrectly generate
15090 DW_TAG_variable tags. */
15092 const char *physname
;
15094 /* Get name of field. */
15095 fieldname
= dwarf2_name (die
, cu
);
15096 if (fieldname
== NULL
)
15099 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15101 /* Only create a symbol if this is an external value.
15102 new_symbol checks this and puts the value in the global symbol
15103 table, which we want. If it is not external, new_symbol
15104 will try to put the value in cu->list_in_scope which is wrong. */
15105 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15107 /* A static const member, not much different than an enum as far as
15108 we're concerned, except that we can support more types. */
15109 new_symbol (die
, NULL
, cu
);
15112 /* Get physical name. */
15113 physname
= dwarf2_physname (fieldname
, die
, cu
);
15115 /* The name is already allocated along with this objfile, so we don't
15116 need to duplicate it for the type. */
15117 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15118 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15119 FIELD_NAME (*fp
) = fieldname
;
15121 else if (die
->tag
== DW_TAG_inheritance
)
15125 /* C++ base class field. */
15126 if (handle_data_member_location (die
, cu
, &offset
))
15127 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15128 FIELD_BITSIZE (*fp
) = 0;
15129 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15130 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
15132 else if (die
->tag
== DW_TAG_variant_part
)
15134 /* process_structure_scope will treat this DIE as a union. */
15135 process_structure_scope (die
, cu
);
15137 /* The variant part is relative to the start of the enclosing
15139 SET_FIELD_BITPOS (*fp
, 0);
15140 fp
->type
= get_die_type (die
, cu
);
15141 fp
->artificial
= 1;
15142 fp
->name
= "<<variant>>";
15144 /* Normally a DW_TAG_variant_part won't have a size, but our
15145 representation requires one, so set it to the maximum of the
15147 if (TYPE_LENGTH (fp
->type
) == 0)
15150 for (int i
= 0; i
< TYPE_NFIELDS (fp
->type
); ++i
)
15151 if (TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
)) > max
)
15152 max
= TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
));
15153 TYPE_LENGTH (fp
->type
) = max
;
15157 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15160 /* Can the type given by DIE define another type? */
15163 type_can_define_types (const struct die_info
*die
)
15167 case DW_TAG_typedef
:
15168 case DW_TAG_class_type
:
15169 case DW_TAG_structure_type
:
15170 case DW_TAG_union_type
:
15171 case DW_TAG_enumeration_type
:
15179 /* Add a type definition defined in the scope of the FIP's class. */
15182 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15183 struct dwarf2_cu
*cu
)
15185 struct decl_field fp
;
15186 memset (&fp
, 0, sizeof (fp
));
15188 gdb_assert (type_can_define_types (die
));
15190 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15191 fp
.name
= dwarf2_name (die
, cu
);
15192 fp
.type
= read_type_die (die
, cu
);
15194 /* Save accessibility. */
15195 enum dwarf_access_attribute accessibility
;
15196 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15198 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15200 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15201 switch (accessibility
)
15203 case DW_ACCESS_public
:
15204 /* The assumed value if neither private nor protected. */
15206 case DW_ACCESS_private
:
15209 case DW_ACCESS_protected
:
15210 fp
.is_protected
= 1;
15213 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15216 if (die
->tag
== DW_TAG_typedef
)
15217 fip
->typedef_field_list
.push_back (fp
);
15219 fip
->nested_types_list
.push_back (fp
);
15222 /* Create the vector of fields, and attach it to the type. */
15225 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15226 struct dwarf2_cu
*cu
)
15228 int nfields
= fip
->nfields
;
15230 /* Record the field count, allocate space for the array of fields,
15231 and create blank accessibility bitfields if necessary. */
15232 TYPE_NFIELDS (type
) = nfields
;
15233 TYPE_FIELDS (type
) = (struct field
*)
15234 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15236 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15238 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15240 TYPE_FIELD_PRIVATE_BITS (type
) =
15241 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15242 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15244 TYPE_FIELD_PROTECTED_BITS (type
) =
15245 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15246 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15248 TYPE_FIELD_IGNORE_BITS (type
) =
15249 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15250 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15253 /* If the type has baseclasses, allocate and clear a bit vector for
15254 TYPE_FIELD_VIRTUAL_BITS. */
15255 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15257 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15258 unsigned char *pointer
;
15260 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15261 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15262 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15263 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15264 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15267 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15269 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15271 for (int index
= 0; index
< nfields
; ++index
)
15273 struct nextfield
&field
= fip
->fields
[index
];
15275 if (field
.variant
.is_discriminant
)
15276 di
->discriminant_index
= index
;
15277 else if (field
.variant
.default_branch
)
15278 di
->default_index
= index
;
15280 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15284 /* Copy the saved-up fields into the field vector. */
15285 for (int i
= 0; i
< nfields
; ++i
)
15287 struct nextfield
&field
15288 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15289 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15291 TYPE_FIELD (type
, i
) = field
.field
;
15292 switch (field
.accessibility
)
15294 case DW_ACCESS_private
:
15295 if (cu
->language
!= language_ada
)
15296 SET_TYPE_FIELD_PRIVATE (type
, i
);
15299 case DW_ACCESS_protected
:
15300 if (cu
->language
!= language_ada
)
15301 SET_TYPE_FIELD_PROTECTED (type
, i
);
15304 case DW_ACCESS_public
:
15308 /* Unknown accessibility. Complain and treat it as public. */
15310 complaint (_("unsupported accessibility %d"),
15311 field
.accessibility
);
15315 if (i
< fip
->baseclasses
.size ())
15317 switch (field
.virtuality
)
15319 case DW_VIRTUALITY_virtual
:
15320 case DW_VIRTUALITY_pure_virtual
:
15321 if (cu
->language
== language_ada
)
15322 error (_("unexpected virtuality in component of Ada type"));
15323 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15330 /* Return true if this member function is a constructor, false
15334 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15336 const char *fieldname
;
15337 const char *type_name
;
15340 if (die
->parent
== NULL
)
15343 if (die
->parent
->tag
!= DW_TAG_structure_type
15344 && die
->parent
->tag
!= DW_TAG_union_type
15345 && die
->parent
->tag
!= DW_TAG_class_type
)
15348 fieldname
= dwarf2_name (die
, cu
);
15349 type_name
= dwarf2_name (die
->parent
, cu
);
15350 if (fieldname
== NULL
|| type_name
== NULL
)
15353 len
= strlen (fieldname
);
15354 return (strncmp (fieldname
, type_name
, len
) == 0
15355 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15358 /* Add a member function to the proper fieldlist. */
15361 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15362 struct type
*type
, struct dwarf2_cu
*cu
)
15364 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15365 struct attribute
*attr
;
15367 struct fnfieldlist
*flp
= nullptr;
15368 struct fn_field
*fnp
;
15369 const char *fieldname
;
15370 struct type
*this_type
;
15371 enum dwarf_access_attribute accessibility
;
15373 if (cu
->language
== language_ada
)
15374 error (_("unexpected member function in Ada type"));
15376 /* Get name of member function. */
15377 fieldname
= dwarf2_name (die
, cu
);
15378 if (fieldname
== NULL
)
15381 /* Look up member function name in fieldlist. */
15382 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15384 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15386 flp
= &fip
->fnfieldlists
[i
];
15391 /* Create a new fnfieldlist if necessary. */
15392 if (flp
== nullptr)
15394 fip
->fnfieldlists
.emplace_back ();
15395 flp
= &fip
->fnfieldlists
.back ();
15396 flp
->name
= fieldname
;
15397 i
= fip
->fnfieldlists
.size () - 1;
15400 /* Create a new member function field and add it to the vector of
15402 flp
->fnfields
.emplace_back ();
15403 fnp
= &flp
->fnfields
.back ();
15405 /* Delay processing of the physname until later. */
15406 if (cu
->language
== language_cplus
)
15407 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15411 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15412 fnp
->physname
= physname
? physname
: "";
15415 fnp
->type
= alloc_type (objfile
);
15416 this_type
= read_type_die (die
, cu
);
15417 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15419 int nparams
= TYPE_NFIELDS (this_type
);
15421 /* TYPE is the domain of this method, and THIS_TYPE is the type
15422 of the method itself (TYPE_CODE_METHOD). */
15423 smash_to_method_type (fnp
->type
, type
,
15424 TYPE_TARGET_TYPE (this_type
),
15425 TYPE_FIELDS (this_type
),
15426 TYPE_NFIELDS (this_type
),
15427 TYPE_VARARGS (this_type
));
15429 /* Handle static member functions.
15430 Dwarf2 has no clean way to discern C++ static and non-static
15431 member functions. G++ helps GDB by marking the first
15432 parameter for non-static member functions (which is the this
15433 pointer) as artificial. We obtain this information from
15434 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15435 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15436 fnp
->voffset
= VOFFSET_STATIC
;
15439 complaint (_("member function type missing for '%s'"),
15440 dwarf2_full_name (fieldname
, die
, cu
));
15442 /* Get fcontext from DW_AT_containing_type if present. */
15443 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15444 fnp
->fcontext
= die_containing_type (die
, cu
);
15446 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15447 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15449 /* Get accessibility. */
15450 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15452 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15454 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15455 switch (accessibility
)
15457 case DW_ACCESS_private
:
15458 fnp
->is_private
= 1;
15460 case DW_ACCESS_protected
:
15461 fnp
->is_protected
= 1;
15465 /* Check for artificial methods. */
15466 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15467 if (attr
&& DW_UNSND (attr
) != 0)
15468 fnp
->is_artificial
= 1;
15470 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15472 /* Get index in virtual function table if it is a virtual member
15473 function. For older versions of GCC, this is an offset in the
15474 appropriate virtual table, as specified by DW_AT_containing_type.
15475 For everyone else, it is an expression to be evaluated relative
15476 to the object address. */
15478 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15481 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15483 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15485 /* Old-style GCC. */
15486 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15488 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15489 || (DW_BLOCK (attr
)->size
> 1
15490 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15491 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15493 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15494 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15495 dwarf2_complex_location_expr_complaint ();
15497 fnp
->voffset
/= cu
->header
.addr_size
;
15501 dwarf2_complex_location_expr_complaint ();
15503 if (!fnp
->fcontext
)
15505 /* If there is no `this' field and no DW_AT_containing_type,
15506 we cannot actually find a base class context for the
15508 if (TYPE_NFIELDS (this_type
) == 0
15509 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15511 complaint (_("cannot determine context for virtual member "
15512 "function \"%s\" (offset %s)"),
15513 fieldname
, sect_offset_str (die
->sect_off
));
15518 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15522 else if (attr_form_is_section_offset (attr
))
15524 dwarf2_complex_location_expr_complaint ();
15528 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15534 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15535 if (attr
&& DW_UNSND (attr
))
15537 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15538 complaint (_("Member function \"%s\" (offset %s) is virtual "
15539 "but the vtable offset is not specified"),
15540 fieldname
, sect_offset_str (die
->sect_off
));
15541 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15542 TYPE_CPLUS_DYNAMIC (type
) = 1;
15547 /* Create the vector of member function fields, and attach it to the type. */
15550 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15551 struct dwarf2_cu
*cu
)
15553 if (cu
->language
== language_ada
)
15554 error (_("unexpected member functions in Ada type"));
15556 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15557 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15559 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15561 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15563 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15564 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15566 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15567 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15568 fn_flp
->fn_fields
= (struct fn_field
*)
15569 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15571 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15572 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15575 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15578 /* Returns non-zero if NAME is the name of a vtable member in CU's
15579 language, zero otherwise. */
15581 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15583 static const char vptr
[] = "_vptr";
15585 /* Look for the C++ form of the vtable. */
15586 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15592 /* GCC outputs unnamed structures that are really pointers to member
15593 functions, with the ABI-specified layout. If TYPE describes
15594 such a structure, smash it into a member function type.
15596 GCC shouldn't do this; it should just output pointer to member DIEs.
15597 This is GCC PR debug/28767. */
15600 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15602 struct type
*pfn_type
, *self_type
, *new_type
;
15604 /* Check for a structure with no name and two children. */
15605 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15608 /* Check for __pfn and __delta members. */
15609 if (TYPE_FIELD_NAME (type
, 0) == NULL
15610 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15611 || TYPE_FIELD_NAME (type
, 1) == NULL
15612 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15615 /* Find the type of the method. */
15616 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15617 if (pfn_type
== NULL
15618 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15619 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15622 /* Look for the "this" argument. */
15623 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15624 if (TYPE_NFIELDS (pfn_type
) == 0
15625 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15626 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15629 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15630 new_type
= alloc_type (objfile
);
15631 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15632 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15633 TYPE_VARARGS (pfn_type
));
15634 smash_to_methodptr_type (type
, new_type
);
15637 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15638 appropriate error checking and issuing complaints if there is a
15642 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15644 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15646 if (attr
== nullptr)
15649 if (!attr_form_is_constant (attr
))
15651 complaint (_("DW_AT_alignment must have constant form"
15652 " - DIE at %s [in module %s]"),
15653 sect_offset_str (die
->sect_off
),
15654 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15659 if (attr
->form
== DW_FORM_sdata
)
15661 LONGEST val
= DW_SND (attr
);
15664 complaint (_("DW_AT_alignment value must not be negative"
15665 " - DIE at %s [in module %s]"),
15666 sect_offset_str (die
->sect_off
),
15667 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15673 align
= DW_UNSND (attr
);
15677 complaint (_("DW_AT_alignment value must not be zero"
15678 " - DIE at %s [in module %s]"),
15679 sect_offset_str (die
->sect_off
),
15680 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15683 if ((align
& (align
- 1)) != 0)
15685 complaint (_("DW_AT_alignment value must be a power of 2"
15686 " - DIE at %s [in module %s]"),
15687 sect_offset_str (die
->sect_off
),
15688 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15695 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15696 the alignment for TYPE. */
15699 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15702 if (!set_type_align (type
, get_alignment (cu
, die
)))
15703 complaint (_("DW_AT_alignment value too large"
15704 " - DIE at %s [in module %s]"),
15705 sect_offset_str (die
->sect_off
),
15706 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15709 /* Called when we find the DIE that starts a structure or union scope
15710 (definition) to create a type for the structure or union. Fill in
15711 the type's name and general properties; the members will not be
15712 processed until process_structure_scope. A symbol table entry for
15713 the type will also not be done until process_structure_scope (assuming
15714 the type has a name).
15716 NOTE: we need to call these functions regardless of whether or not the
15717 DIE has a DW_AT_name attribute, since it might be an anonymous
15718 structure or union. This gets the type entered into our set of
15719 user defined types. */
15721 static struct type
*
15722 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15724 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15726 struct attribute
*attr
;
15729 /* If the definition of this type lives in .debug_types, read that type.
15730 Don't follow DW_AT_specification though, that will take us back up
15731 the chain and we want to go down. */
15732 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15735 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15737 /* The type's CU may not be the same as CU.
15738 Ensure TYPE is recorded with CU in die_type_hash. */
15739 return set_die_type (die
, type
, cu
);
15742 type
= alloc_type (objfile
);
15743 INIT_CPLUS_SPECIFIC (type
);
15745 name
= dwarf2_name (die
, cu
);
15748 if (cu
->language
== language_cplus
15749 || cu
->language
== language_d
15750 || cu
->language
== language_rust
)
15752 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15754 /* dwarf2_full_name might have already finished building the DIE's
15755 type. If so, there is no need to continue. */
15756 if (get_die_type (die
, cu
) != NULL
)
15757 return get_die_type (die
, cu
);
15759 TYPE_NAME (type
) = full_name
;
15763 /* The name is already allocated along with this objfile, so
15764 we don't need to duplicate it for the type. */
15765 TYPE_NAME (type
) = name
;
15769 if (die
->tag
== DW_TAG_structure_type
)
15771 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15773 else if (die
->tag
== DW_TAG_union_type
)
15775 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15777 else if (die
->tag
== DW_TAG_variant_part
)
15779 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15780 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15784 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15787 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15788 TYPE_DECLARED_CLASS (type
) = 1;
15790 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15793 if (attr_form_is_constant (attr
))
15794 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15797 /* For the moment, dynamic type sizes are not supported
15798 by GDB's struct type. The actual size is determined
15799 on-demand when resolving the type of a given object,
15800 so set the type's length to zero for now. Otherwise,
15801 we record an expression as the length, and that expression
15802 could lead to a very large value, which could eventually
15803 lead to us trying to allocate that much memory when creating
15804 a value of that type. */
15805 TYPE_LENGTH (type
) = 0;
15810 TYPE_LENGTH (type
) = 0;
15813 maybe_set_alignment (cu
, die
, type
);
15815 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15817 /* ICC<14 does not output the required DW_AT_declaration on
15818 incomplete types, but gives them a size of zero. */
15819 TYPE_STUB (type
) = 1;
15822 TYPE_STUB_SUPPORTED (type
) = 1;
15824 if (die_is_declaration (die
, cu
))
15825 TYPE_STUB (type
) = 1;
15826 else if (attr
== NULL
&& die
->child
== NULL
15827 && producer_is_realview (cu
->producer
))
15828 /* RealView does not output the required DW_AT_declaration
15829 on incomplete types. */
15830 TYPE_STUB (type
) = 1;
15832 /* We need to add the type field to the die immediately so we don't
15833 infinitely recurse when dealing with pointers to the structure
15834 type within the structure itself. */
15835 set_die_type (die
, type
, cu
);
15837 /* set_die_type should be already done. */
15838 set_descriptive_type (type
, die
, cu
);
15843 /* A helper for process_structure_scope that handles a single member
15847 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15848 struct field_info
*fi
,
15849 std::vector
<struct symbol
*> *template_args
,
15850 struct dwarf2_cu
*cu
)
15852 if (child_die
->tag
== DW_TAG_member
15853 || child_die
->tag
== DW_TAG_variable
15854 || child_die
->tag
== DW_TAG_variant_part
)
15856 /* NOTE: carlton/2002-11-05: A C++ static data member
15857 should be a DW_TAG_member that is a declaration, but
15858 all versions of G++ as of this writing (so through at
15859 least 3.2.1) incorrectly generate DW_TAG_variable
15860 tags for them instead. */
15861 dwarf2_add_field (fi
, child_die
, cu
);
15863 else if (child_die
->tag
== DW_TAG_subprogram
)
15865 /* Rust doesn't have member functions in the C++ sense.
15866 However, it does emit ordinary functions as children
15867 of a struct DIE. */
15868 if (cu
->language
== language_rust
)
15869 read_func_scope (child_die
, cu
);
15872 /* C++ member function. */
15873 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15876 else if (child_die
->tag
== DW_TAG_inheritance
)
15878 /* C++ base class field. */
15879 dwarf2_add_field (fi
, child_die
, cu
);
15881 else if (type_can_define_types (child_die
))
15882 dwarf2_add_type_defn (fi
, child_die
, cu
);
15883 else if (child_die
->tag
== DW_TAG_template_type_param
15884 || child_die
->tag
== DW_TAG_template_value_param
)
15886 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15889 template_args
->push_back (arg
);
15891 else if (child_die
->tag
== DW_TAG_variant
)
15893 /* In a variant we want to get the discriminant and also add a
15894 field for our sole member child. */
15895 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15897 for (die_info
*variant_child
= child_die
->child
;
15898 variant_child
!= NULL
;
15899 variant_child
= sibling_die (variant_child
))
15901 if (variant_child
->tag
== DW_TAG_member
)
15903 handle_struct_member_die (variant_child
, type
, fi
,
15904 template_args
, cu
);
15905 /* Only handle the one. */
15910 /* We don't handle this but we might as well report it if we see
15912 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15913 complaint (_("DW_AT_discr_list is not supported yet"
15914 " - DIE at %s [in module %s]"),
15915 sect_offset_str (child_die
->sect_off
),
15916 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15918 /* The first field was just added, so we can stash the
15919 discriminant there. */
15920 gdb_assert (!fi
->fields
.empty ());
15922 fi
->fields
.back ().variant
.default_branch
= true;
15924 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15928 /* Finish creating a structure or union type, including filling in
15929 its members and creating a symbol for it. */
15932 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15934 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15935 struct die_info
*child_die
;
15938 type
= get_die_type (die
, cu
);
15940 type
= read_structure_type (die
, cu
);
15942 /* When reading a DW_TAG_variant_part, we need to notice when we
15943 read the discriminant member, so we can record it later in the
15944 discriminant_info. */
15945 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15946 sect_offset discr_offset
;
15947 bool has_template_parameters
= false;
15949 if (is_variant_part
)
15951 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15954 /* Maybe it's a univariant form, an extension we support.
15955 In this case arrange not to check the offset. */
15956 is_variant_part
= false;
15958 else if (attr_form_is_ref (discr
))
15960 struct dwarf2_cu
*target_cu
= cu
;
15961 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15963 discr_offset
= target_die
->sect_off
;
15967 complaint (_("DW_AT_discr does not have DIE reference form"
15968 " - DIE at %s [in module %s]"),
15969 sect_offset_str (die
->sect_off
),
15970 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15971 is_variant_part
= false;
15975 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15977 struct field_info fi
;
15978 std::vector
<struct symbol
*> template_args
;
15980 child_die
= die
->child
;
15982 while (child_die
&& child_die
->tag
)
15984 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15986 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
15987 fi
.fields
.back ().variant
.is_discriminant
= true;
15989 child_die
= sibling_die (child_die
);
15992 /* Attach template arguments to type. */
15993 if (!template_args
.empty ())
15995 has_template_parameters
= true;
15996 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15997 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15998 TYPE_TEMPLATE_ARGUMENTS (type
)
15999 = XOBNEWVEC (&objfile
->objfile_obstack
,
16001 TYPE_N_TEMPLATE_ARGUMENTS (type
));
16002 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
16003 template_args
.data (),
16004 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
16005 * sizeof (struct symbol
*)));
16008 /* Attach fields and member functions to the type. */
16010 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
16011 if (!fi
.fnfieldlists
.empty ())
16013 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
16015 /* Get the type which refers to the base class (possibly this
16016 class itself) which contains the vtable pointer for the current
16017 class from the DW_AT_containing_type attribute. This use of
16018 DW_AT_containing_type is a GNU extension. */
16020 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
16022 struct type
*t
= die_containing_type (die
, cu
);
16024 set_type_vptr_basetype (type
, t
);
16029 /* Our own class provides vtbl ptr. */
16030 for (i
= TYPE_NFIELDS (t
) - 1;
16031 i
>= TYPE_N_BASECLASSES (t
);
16034 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
16036 if (is_vtable_name (fieldname
, cu
))
16038 set_type_vptr_fieldno (type
, i
);
16043 /* Complain if virtual function table field not found. */
16044 if (i
< TYPE_N_BASECLASSES (t
))
16045 complaint (_("virtual function table pointer "
16046 "not found when defining class '%s'"),
16047 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
16051 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16054 else if (cu
->producer
16055 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16057 /* The IBM XLC compiler does not provide direct indication
16058 of the containing type, but the vtable pointer is
16059 always named __vfp. */
16063 for (i
= TYPE_NFIELDS (type
) - 1;
16064 i
>= TYPE_N_BASECLASSES (type
);
16067 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16069 set_type_vptr_fieldno (type
, i
);
16070 set_type_vptr_basetype (type
, type
);
16077 /* Copy fi.typedef_field_list linked list elements content into the
16078 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16079 if (!fi
.typedef_field_list
.empty ())
16081 int count
= fi
.typedef_field_list
.size ();
16083 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16084 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16085 = ((struct decl_field
*)
16087 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16088 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16090 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16091 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16094 /* Copy fi.nested_types_list linked list elements content into the
16095 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16096 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16098 int count
= fi
.nested_types_list
.size ();
16100 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16101 TYPE_NESTED_TYPES_ARRAY (type
)
16102 = ((struct decl_field
*)
16103 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16104 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16106 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16107 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16111 quirk_gcc_member_function_pointer (type
, objfile
);
16112 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16113 cu
->rust_unions
.push_back (type
);
16115 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16116 snapshots) has been known to create a die giving a declaration
16117 for a class that has, as a child, a die giving a definition for a
16118 nested class. So we have to process our children even if the
16119 current die is a declaration. Normally, of course, a declaration
16120 won't have any children at all. */
16122 child_die
= die
->child
;
16124 while (child_die
!= NULL
&& child_die
->tag
)
16126 if (child_die
->tag
== DW_TAG_member
16127 || child_die
->tag
== DW_TAG_variable
16128 || child_die
->tag
== DW_TAG_inheritance
16129 || child_die
->tag
== DW_TAG_template_value_param
16130 || child_die
->tag
== DW_TAG_template_type_param
)
16135 process_die (child_die
, cu
);
16137 child_die
= sibling_die (child_die
);
16140 /* Do not consider external references. According to the DWARF standard,
16141 these DIEs are identified by the fact that they have no byte_size
16142 attribute, and a declaration attribute. */
16143 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16144 || !die_is_declaration (die
, cu
))
16146 struct symbol
*sym
= new_symbol (die
, type
, cu
);
16148 if (has_template_parameters
)
16150 struct symtab
*symtab
;
16151 if (sym
!= nullptr)
16152 symtab
= symbol_symtab (sym
);
16153 else if (cu
->line_header
!= nullptr)
16155 /* Any related symtab will do. */
16157 = cu
->line_header
->file_name_at (file_name_index (1))->symtab
;
16162 complaint (_("could not find suitable "
16163 "symtab for template parameter"
16164 " - DIE at %s [in module %s]"),
16165 sect_offset_str (die
->sect_off
),
16166 objfile_name (objfile
));
16169 if (symtab
!= nullptr)
16171 /* Make sure that the symtab is set on the new symbols.
16172 Even though they don't appear in this symtab directly,
16173 other parts of gdb assume that symbols do, and this is
16174 reasonably true. */
16175 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
16176 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
16182 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16183 update TYPE using some information only available in DIE's children. */
16186 update_enumeration_type_from_children (struct die_info
*die
,
16188 struct dwarf2_cu
*cu
)
16190 struct die_info
*child_die
;
16191 int unsigned_enum
= 1;
16195 auto_obstack obstack
;
16197 for (child_die
= die
->child
;
16198 child_die
!= NULL
&& child_die
->tag
;
16199 child_die
= sibling_die (child_die
))
16201 struct attribute
*attr
;
16203 const gdb_byte
*bytes
;
16204 struct dwarf2_locexpr_baton
*baton
;
16207 if (child_die
->tag
!= DW_TAG_enumerator
)
16210 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16214 name
= dwarf2_name (child_die
, cu
);
16216 name
= "<anonymous enumerator>";
16218 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16219 &value
, &bytes
, &baton
);
16225 else if ((mask
& value
) != 0)
16230 /* If we already know that the enum type is neither unsigned, nor
16231 a flag type, no need to look at the rest of the enumerates. */
16232 if (!unsigned_enum
&& !flag_enum
)
16237 TYPE_UNSIGNED (type
) = 1;
16239 TYPE_FLAG_ENUM (type
) = 1;
16242 /* Given a DW_AT_enumeration_type die, set its type. We do not
16243 complete the type's fields yet, or create any symbols. */
16245 static struct type
*
16246 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16248 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16250 struct attribute
*attr
;
16253 /* If the definition of this type lives in .debug_types, read that type.
16254 Don't follow DW_AT_specification though, that will take us back up
16255 the chain and we want to go down. */
16256 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16259 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16261 /* The type's CU may not be the same as CU.
16262 Ensure TYPE is recorded with CU in die_type_hash. */
16263 return set_die_type (die
, type
, cu
);
16266 type
= alloc_type (objfile
);
16268 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16269 name
= dwarf2_full_name (NULL
, die
, cu
);
16271 TYPE_NAME (type
) = name
;
16273 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16276 struct type
*underlying_type
= die_type (die
, cu
);
16278 TYPE_TARGET_TYPE (type
) = underlying_type
;
16281 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16284 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16288 TYPE_LENGTH (type
) = 0;
16291 maybe_set_alignment (cu
, die
, type
);
16293 /* The enumeration DIE can be incomplete. In Ada, any type can be
16294 declared as private in the package spec, and then defined only
16295 inside the package body. Such types are known as Taft Amendment
16296 Types. When another package uses such a type, an incomplete DIE
16297 may be generated by the compiler. */
16298 if (die_is_declaration (die
, cu
))
16299 TYPE_STUB (type
) = 1;
16301 /* Finish the creation of this type by using the enum's children.
16302 We must call this even when the underlying type has been provided
16303 so that we can determine if we're looking at a "flag" enum. */
16304 update_enumeration_type_from_children (die
, type
, cu
);
16306 /* If this type has an underlying type that is not a stub, then we
16307 may use its attributes. We always use the "unsigned" attribute
16308 in this situation, because ordinarily we guess whether the type
16309 is unsigned -- but the guess can be wrong and the underlying type
16310 can tell us the reality. However, we defer to a local size
16311 attribute if one exists, because this lets the compiler override
16312 the underlying type if needed. */
16313 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16315 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16316 if (TYPE_LENGTH (type
) == 0)
16317 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16318 if (TYPE_RAW_ALIGN (type
) == 0
16319 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16320 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16323 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16325 return set_die_type (die
, type
, cu
);
16328 /* Given a pointer to a die which begins an enumeration, process all
16329 the dies that define the members of the enumeration, and create the
16330 symbol for the enumeration type.
16332 NOTE: We reverse the order of the element list. */
16335 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16337 struct type
*this_type
;
16339 this_type
= get_die_type (die
, cu
);
16340 if (this_type
== NULL
)
16341 this_type
= read_enumeration_type (die
, cu
);
16343 if (die
->child
!= NULL
)
16345 struct die_info
*child_die
;
16346 struct symbol
*sym
;
16347 struct field
*fields
= NULL
;
16348 int num_fields
= 0;
16351 child_die
= die
->child
;
16352 while (child_die
&& child_die
->tag
)
16354 if (child_die
->tag
!= DW_TAG_enumerator
)
16356 process_die (child_die
, cu
);
16360 name
= dwarf2_name (child_die
, cu
);
16363 sym
= new_symbol (child_die
, this_type
, cu
);
16365 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16367 fields
= (struct field
*)
16369 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16370 * sizeof (struct field
));
16373 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16374 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16375 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16376 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16382 child_die
= sibling_die (child_die
);
16387 TYPE_NFIELDS (this_type
) = num_fields
;
16388 TYPE_FIELDS (this_type
) = (struct field
*)
16389 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16390 memcpy (TYPE_FIELDS (this_type
), fields
,
16391 sizeof (struct field
) * num_fields
);
16396 /* If we are reading an enum from a .debug_types unit, and the enum
16397 is a declaration, and the enum is not the signatured type in the
16398 unit, then we do not want to add a symbol for it. Adding a
16399 symbol would in some cases obscure the true definition of the
16400 enum, giving users an incomplete type when the definition is
16401 actually available. Note that we do not want to do this for all
16402 enums which are just declarations, because C++0x allows forward
16403 enum declarations. */
16404 if (cu
->per_cu
->is_debug_types
16405 && die_is_declaration (die
, cu
))
16407 struct signatured_type
*sig_type
;
16409 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16410 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16411 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16415 new_symbol (die
, this_type
, cu
);
16418 /* Extract all information from a DW_TAG_array_type DIE and put it in
16419 the DIE's type field. For now, this only handles one dimensional
16422 static struct type
*
16423 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16425 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16426 struct die_info
*child_die
;
16428 struct type
*element_type
, *range_type
, *index_type
;
16429 struct attribute
*attr
;
16431 struct dynamic_prop
*byte_stride_prop
= NULL
;
16432 unsigned int bit_stride
= 0;
16434 element_type
= die_type (die
, cu
);
16436 /* The die_type call above may have already set the type for this DIE. */
16437 type
= get_die_type (die
, cu
);
16441 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16447 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16448 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
);
16451 complaint (_("unable to read array DW_AT_byte_stride "
16452 " - DIE at %s [in module %s]"),
16453 sect_offset_str (die
->sect_off
),
16454 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16455 /* Ignore this attribute. We will likely not be able to print
16456 arrays of this type correctly, but there is little we can do
16457 to help if we cannot read the attribute's value. */
16458 byte_stride_prop
= NULL
;
16462 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16464 bit_stride
= DW_UNSND (attr
);
16466 /* Irix 6.2 native cc creates array types without children for
16467 arrays with unspecified length. */
16468 if (die
->child
== NULL
)
16470 index_type
= objfile_type (objfile
)->builtin_int
;
16471 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16472 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16473 byte_stride_prop
, bit_stride
);
16474 return set_die_type (die
, type
, cu
);
16477 std::vector
<struct type
*> range_types
;
16478 child_die
= die
->child
;
16479 while (child_die
&& child_die
->tag
)
16481 if (child_die
->tag
== DW_TAG_subrange_type
)
16483 struct type
*child_type
= read_type_die (child_die
, cu
);
16485 if (child_type
!= NULL
)
16487 /* The range type was succesfully read. Save it for the
16488 array type creation. */
16489 range_types
.push_back (child_type
);
16492 child_die
= sibling_die (child_die
);
16495 /* Dwarf2 dimensions are output from left to right, create the
16496 necessary array types in backwards order. */
16498 type
= element_type
;
16500 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16504 while (i
< range_types
.size ())
16505 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16506 byte_stride_prop
, bit_stride
);
16510 size_t ndim
= range_types
.size ();
16512 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16513 byte_stride_prop
, bit_stride
);
16516 /* Understand Dwarf2 support for vector types (like they occur on
16517 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16518 array type. This is not part of the Dwarf2/3 standard yet, but a
16519 custom vendor extension. The main difference between a regular
16520 array and the vector variant is that vectors are passed by value
16522 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16524 make_vector_type (type
);
16526 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16527 implementation may choose to implement triple vectors using this
16529 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16532 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16533 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16535 complaint (_("DW_AT_byte_size for array type smaller "
16536 "than the total size of elements"));
16539 name
= dwarf2_name (die
, cu
);
16541 TYPE_NAME (type
) = name
;
16543 maybe_set_alignment (cu
, die
, type
);
16545 /* Install the type in the die. */
16546 set_die_type (die
, type
, cu
);
16548 /* set_die_type should be already done. */
16549 set_descriptive_type (type
, die
, cu
);
16554 static enum dwarf_array_dim_ordering
16555 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16557 struct attribute
*attr
;
16559 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16562 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16564 /* GNU F77 is a special case, as at 08/2004 array type info is the
16565 opposite order to the dwarf2 specification, but data is still
16566 laid out as per normal fortran.
16568 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16569 version checking. */
16571 if (cu
->language
== language_fortran
16572 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16574 return DW_ORD_row_major
;
16577 switch (cu
->language_defn
->la_array_ordering
)
16579 case array_column_major
:
16580 return DW_ORD_col_major
;
16581 case array_row_major
:
16583 return DW_ORD_row_major
;
16587 /* Extract all information from a DW_TAG_set_type DIE and put it in
16588 the DIE's type field. */
16590 static struct type
*
16591 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16593 struct type
*domain_type
, *set_type
;
16594 struct attribute
*attr
;
16596 domain_type
= die_type (die
, cu
);
16598 /* The die_type call above may have already set the type for this DIE. */
16599 set_type
= get_die_type (die
, cu
);
16603 set_type
= create_set_type (NULL
, domain_type
);
16605 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16607 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16609 maybe_set_alignment (cu
, die
, set_type
);
16611 return set_die_type (die
, set_type
, cu
);
16614 /* A helper for read_common_block that creates a locexpr baton.
16615 SYM is the symbol which we are marking as computed.
16616 COMMON_DIE is the DIE for the common block.
16617 COMMON_LOC is the location expression attribute for the common
16619 MEMBER_LOC is the location expression attribute for the particular
16620 member of the common block that we are processing.
16621 CU is the CU from which the above come. */
16624 mark_common_block_symbol_computed (struct symbol
*sym
,
16625 struct die_info
*common_die
,
16626 struct attribute
*common_loc
,
16627 struct attribute
*member_loc
,
16628 struct dwarf2_cu
*cu
)
16630 struct dwarf2_per_objfile
*dwarf2_per_objfile
16631 = cu
->per_cu
->dwarf2_per_objfile
;
16632 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16633 struct dwarf2_locexpr_baton
*baton
;
16635 unsigned int cu_off
;
16636 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16637 LONGEST offset
= 0;
16639 gdb_assert (common_loc
&& member_loc
);
16640 gdb_assert (attr_form_is_block (common_loc
));
16641 gdb_assert (attr_form_is_block (member_loc
)
16642 || attr_form_is_constant (member_loc
));
16644 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16645 baton
->per_cu
= cu
->per_cu
;
16646 gdb_assert (baton
->per_cu
);
16648 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16650 if (attr_form_is_constant (member_loc
))
16652 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16653 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16656 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16658 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16661 *ptr
++ = DW_OP_call4
;
16662 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16663 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16666 if (attr_form_is_constant (member_loc
))
16668 *ptr
++ = DW_OP_addr
;
16669 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16670 ptr
+= cu
->header
.addr_size
;
16674 /* We have to copy the data here, because DW_OP_call4 will only
16675 use a DW_AT_location attribute. */
16676 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16677 ptr
+= DW_BLOCK (member_loc
)->size
;
16680 *ptr
++ = DW_OP_plus
;
16681 gdb_assert (ptr
- baton
->data
== baton
->size
);
16683 SYMBOL_LOCATION_BATON (sym
) = baton
;
16684 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16687 /* Create appropriate locally-scoped variables for all the
16688 DW_TAG_common_block entries. Also create a struct common_block
16689 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16690 is used to sepate the common blocks name namespace from regular
16694 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16696 struct attribute
*attr
;
16698 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16701 /* Support the .debug_loc offsets. */
16702 if (attr_form_is_block (attr
))
16706 else if (attr_form_is_section_offset (attr
))
16708 dwarf2_complex_location_expr_complaint ();
16713 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16714 "common block member");
16719 if (die
->child
!= NULL
)
16721 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16722 struct die_info
*child_die
;
16723 size_t n_entries
= 0, size
;
16724 struct common_block
*common_block
;
16725 struct symbol
*sym
;
16727 for (child_die
= die
->child
;
16728 child_die
&& child_die
->tag
;
16729 child_die
= sibling_die (child_die
))
16732 size
= (sizeof (struct common_block
)
16733 + (n_entries
- 1) * sizeof (struct symbol
*));
16735 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16737 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16738 common_block
->n_entries
= 0;
16740 for (child_die
= die
->child
;
16741 child_die
&& child_die
->tag
;
16742 child_die
= sibling_die (child_die
))
16744 /* Create the symbol in the DW_TAG_common_block block in the current
16746 sym
= new_symbol (child_die
, NULL
, cu
);
16749 struct attribute
*member_loc
;
16751 common_block
->contents
[common_block
->n_entries
++] = sym
;
16753 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16757 /* GDB has handled this for a long time, but it is
16758 not specified by DWARF. It seems to have been
16759 emitted by gfortran at least as recently as:
16760 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16761 complaint (_("Variable in common block has "
16762 "DW_AT_data_member_location "
16763 "- DIE at %s [in module %s]"),
16764 sect_offset_str (child_die
->sect_off
),
16765 objfile_name (objfile
));
16767 if (attr_form_is_section_offset (member_loc
))
16768 dwarf2_complex_location_expr_complaint ();
16769 else if (attr_form_is_constant (member_loc
)
16770 || attr_form_is_block (member_loc
))
16773 mark_common_block_symbol_computed (sym
, die
, attr
,
16777 dwarf2_complex_location_expr_complaint ();
16782 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16783 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16787 /* Create a type for a C++ namespace. */
16789 static struct type
*
16790 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16792 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16793 const char *previous_prefix
, *name
;
16797 /* For extensions, reuse the type of the original namespace. */
16798 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16800 struct die_info
*ext_die
;
16801 struct dwarf2_cu
*ext_cu
= cu
;
16803 ext_die
= dwarf2_extension (die
, &ext_cu
);
16804 type
= read_type_die (ext_die
, ext_cu
);
16806 /* EXT_CU may not be the same as CU.
16807 Ensure TYPE is recorded with CU in die_type_hash. */
16808 return set_die_type (die
, type
, cu
);
16811 name
= namespace_name (die
, &is_anonymous
, cu
);
16813 /* Now build the name of the current namespace. */
16815 previous_prefix
= determine_prefix (die
, cu
);
16816 if (previous_prefix
[0] != '\0')
16817 name
= typename_concat (&objfile
->objfile_obstack
,
16818 previous_prefix
, name
, 0, cu
);
16820 /* Create the type. */
16821 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16823 return set_die_type (die
, type
, cu
);
16826 /* Read a namespace scope. */
16829 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16831 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16834 /* Add a symbol associated to this if we haven't seen the namespace
16835 before. Also, add a using directive if it's an anonymous
16838 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16842 type
= read_type_die (die
, cu
);
16843 new_symbol (die
, type
, cu
);
16845 namespace_name (die
, &is_anonymous
, cu
);
16848 const char *previous_prefix
= determine_prefix (die
, cu
);
16850 std::vector
<const char *> excludes
;
16851 add_using_directive (using_directives (cu
),
16852 previous_prefix
, TYPE_NAME (type
), NULL
,
16853 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16857 if (die
->child
!= NULL
)
16859 struct die_info
*child_die
= die
->child
;
16861 while (child_die
&& child_die
->tag
)
16863 process_die (child_die
, cu
);
16864 child_die
= sibling_die (child_die
);
16869 /* Read a Fortran module as type. This DIE can be only a declaration used for
16870 imported module. Still we need that type as local Fortran "use ... only"
16871 declaration imports depend on the created type in determine_prefix. */
16873 static struct type
*
16874 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16876 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16877 const char *module_name
;
16880 module_name
= dwarf2_name (die
, cu
);
16881 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16883 return set_die_type (die
, type
, cu
);
16886 /* Read a Fortran module. */
16889 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16891 struct die_info
*child_die
= die
->child
;
16894 type
= read_type_die (die
, cu
);
16895 new_symbol (die
, type
, cu
);
16897 while (child_die
&& child_die
->tag
)
16899 process_die (child_die
, cu
);
16900 child_die
= sibling_die (child_die
);
16904 /* Return the name of the namespace represented by DIE. Set
16905 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16908 static const char *
16909 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16911 struct die_info
*current_die
;
16912 const char *name
= NULL
;
16914 /* Loop through the extensions until we find a name. */
16916 for (current_die
= die
;
16917 current_die
!= NULL
;
16918 current_die
= dwarf2_extension (die
, &cu
))
16920 /* We don't use dwarf2_name here so that we can detect the absence
16921 of a name -> anonymous namespace. */
16922 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16928 /* Is it an anonymous namespace? */
16930 *is_anonymous
= (name
== NULL
);
16932 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16937 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16938 the user defined type vector. */
16940 static struct type
*
16941 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16943 struct gdbarch
*gdbarch
16944 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16945 struct comp_unit_head
*cu_header
= &cu
->header
;
16947 struct attribute
*attr_byte_size
;
16948 struct attribute
*attr_address_class
;
16949 int byte_size
, addr_class
;
16950 struct type
*target_type
;
16952 target_type
= die_type (die
, cu
);
16954 /* The die_type call above may have already set the type for this DIE. */
16955 type
= get_die_type (die
, cu
);
16959 type
= lookup_pointer_type (target_type
);
16961 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16962 if (attr_byte_size
)
16963 byte_size
= DW_UNSND (attr_byte_size
);
16965 byte_size
= cu_header
->addr_size
;
16967 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16968 if (attr_address_class
)
16969 addr_class
= DW_UNSND (attr_address_class
);
16971 addr_class
= DW_ADDR_none
;
16973 ULONGEST alignment
= get_alignment (cu
, die
);
16975 /* If the pointer size, alignment, or address class is different
16976 than the default, create a type variant marked as such and set
16977 the length accordingly. */
16978 if (TYPE_LENGTH (type
) != byte_size
16979 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16980 && alignment
!= TYPE_RAW_ALIGN (type
))
16981 || addr_class
!= DW_ADDR_none
)
16983 if (gdbarch_address_class_type_flags_p (gdbarch
))
16987 type_flags
= gdbarch_address_class_type_flags
16988 (gdbarch
, byte_size
, addr_class
);
16989 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16991 type
= make_type_with_address_space (type
, type_flags
);
16993 else if (TYPE_LENGTH (type
) != byte_size
)
16995 complaint (_("invalid pointer size %d"), byte_size
);
16997 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16999 complaint (_("Invalid DW_AT_alignment"
17000 " - DIE at %s [in module %s]"),
17001 sect_offset_str (die
->sect_off
),
17002 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17006 /* Should we also complain about unhandled address classes? */
17010 TYPE_LENGTH (type
) = byte_size
;
17011 set_type_align (type
, alignment
);
17012 return set_die_type (die
, type
, cu
);
17015 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
17016 the user defined type vector. */
17018 static struct type
*
17019 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17022 struct type
*to_type
;
17023 struct type
*domain
;
17025 to_type
= die_type (die
, cu
);
17026 domain
= die_containing_type (die
, cu
);
17028 /* The calls above may have already set the type for this DIE. */
17029 type
= get_die_type (die
, cu
);
17033 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
17034 type
= lookup_methodptr_type (to_type
);
17035 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
17037 struct type
*new_type
17038 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
17040 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
17041 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
17042 TYPE_VARARGS (to_type
));
17043 type
= lookup_methodptr_type (new_type
);
17046 type
= lookup_memberptr_type (to_type
, domain
);
17048 return set_die_type (die
, type
, cu
);
17051 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
17052 the user defined type vector. */
17054 static struct type
*
17055 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17056 enum type_code refcode
)
17058 struct comp_unit_head
*cu_header
= &cu
->header
;
17059 struct type
*type
, *target_type
;
17060 struct attribute
*attr
;
17062 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17064 target_type
= die_type (die
, cu
);
17066 /* The die_type call above may have already set the type for this DIE. */
17067 type
= get_die_type (die
, cu
);
17071 type
= lookup_reference_type (target_type
, refcode
);
17072 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17075 TYPE_LENGTH (type
) = DW_UNSND (attr
);
17079 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17081 maybe_set_alignment (cu
, die
, type
);
17082 return set_die_type (die
, type
, cu
);
17085 /* Add the given cv-qualifiers to the element type of the array. GCC
17086 outputs DWARF type qualifiers that apply to an array, not the
17087 element type. But GDB relies on the array element type to carry
17088 the cv-qualifiers. This mimics section 6.7.3 of the C99
17091 static struct type
*
17092 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17093 struct type
*base_type
, int cnst
, int voltl
)
17095 struct type
*el_type
, *inner_array
;
17097 base_type
= copy_type (base_type
);
17098 inner_array
= base_type
;
17100 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
17102 TYPE_TARGET_TYPE (inner_array
) =
17103 copy_type (TYPE_TARGET_TYPE (inner_array
));
17104 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17107 el_type
= TYPE_TARGET_TYPE (inner_array
);
17108 cnst
|= TYPE_CONST (el_type
);
17109 voltl
|= TYPE_VOLATILE (el_type
);
17110 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17112 return set_die_type (die
, base_type
, cu
);
17115 static struct type
*
17116 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17118 struct type
*base_type
, *cv_type
;
17120 base_type
= die_type (die
, cu
);
17122 /* The die_type call above may have already set the type for this DIE. */
17123 cv_type
= get_die_type (die
, cu
);
17127 /* In case the const qualifier is applied to an array type, the element type
17128 is so qualified, not the array type (section 6.7.3 of C99). */
17129 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17130 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17132 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17133 return set_die_type (die
, cv_type
, cu
);
17136 static struct type
*
17137 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17139 struct type
*base_type
, *cv_type
;
17141 base_type
= die_type (die
, cu
);
17143 /* The die_type call above may have already set the type for this DIE. */
17144 cv_type
= get_die_type (die
, cu
);
17148 /* In case the volatile qualifier is applied to an array type, the
17149 element type is so qualified, not the array type (section 6.7.3
17151 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17152 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17154 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17155 return set_die_type (die
, cv_type
, cu
);
17158 /* Handle DW_TAG_restrict_type. */
17160 static struct type
*
17161 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17163 struct type
*base_type
, *cv_type
;
17165 base_type
= die_type (die
, cu
);
17167 /* The die_type call above may have already set the type for this DIE. */
17168 cv_type
= get_die_type (die
, cu
);
17172 cv_type
= make_restrict_type (base_type
);
17173 return set_die_type (die
, cv_type
, cu
);
17176 /* Handle DW_TAG_atomic_type. */
17178 static struct type
*
17179 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17181 struct type
*base_type
, *cv_type
;
17183 base_type
= die_type (die
, cu
);
17185 /* The die_type call above may have already set the type for this DIE. */
17186 cv_type
= get_die_type (die
, cu
);
17190 cv_type
= make_atomic_type (base_type
);
17191 return set_die_type (die
, cv_type
, cu
);
17194 /* Extract all information from a DW_TAG_string_type DIE and add to
17195 the user defined type vector. It isn't really a user defined type,
17196 but it behaves like one, with other DIE's using an AT_user_def_type
17197 attribute to reference it. */
17199 static struct type
*
17200 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17202 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17203 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17204 struct type
*type
, *range_type
, *index_type
, *char_type
;
17205 struct attribute
*attr
;
17206 unsigned int length
;
17208 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17211 length
= DW_UNSND (attr
);
17215 /* Check for the DW_AT_byte_size attribute. */
17216 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17219 length
= DW_UNSND (attr
);
17227 index_type
= objfile_type (objfile
)->builtin_int
;
17228 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17229 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17230 type
= create_string_type (NULL
, char_type
, range_type
);
17232 return set_die_type (die
, type
, cu
);
17235 /* Assuming that DIE corresponds to a function, returns nonzero
17236 if the function is prototyped. */
17239 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17241 struct attribute
*attr
;
17243 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17244 if (attr
&& (DW_UNSND (attr
) != 0))
17247 /* The DWARF standard implies that the DW_AT_prototyped attribute
17248 is only meaninful for C, but the concept also extends to other
17249 languages that allow unprototyped functions (Eg: Objective C).
17250 For all other languages, assume that functions are always
17252 if (cu
->language
!= language_c
17253 && cu
->language
!= language_objc
17254 && cu
->language
!= language_opencl
)
17257 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17258 prototyped and unprototyped functions; default to prototyped,
17259 since that is more common in modern code (and RealView warns
17260 about unprototyped functions). */
17261 if (producer_is_realview (cu
->producer
))
17267 /* Handle DIES due to C code like:
17271 int (*funcp)(int a, long l);
17275 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17277 static struct type
*
17278 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17280 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17281 struct type
*type
; /* Type that this function returns. */
17282 struct type
*ftype
; /* Function that returns above type. */
17283 struct attribute
*attr
;
17285 type
= die_type (die
, cu
);
17287 /* The die_type call above may have already set the type for this DIE. */
17288 ftype
= get_die_type (die
, cu
);
17292 ftype
= lookup_function_type (type
);
17294 if (prototyped_function_p (die
, cu
))
17295 TYPE_PROTOTYPED (ftype
) = 1;
17297 /* Store the calling convention in the type if it's available in
17298 the subroutine die. Otherwise set the calling convention to
17299 the default value DW_CC_normal. */
17300 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17302 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17303 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17304 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17306 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17308 /* Record whether the function returns normally to its caller or not
17309 if the DWARF producer set that information. */
17310 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17311 if (attr
&& (DW_UNSND (attr
) != 0))
17312 TYPE_NO_RETURN (ftype
) = 1;
17314 /* We need to add the subroutine type to the die immediately so
17315 we don't infinitely recurse when dealing with parameters
17316 declared as the same subroutine type. */
17317 set_die_type (die
, ftype
, cu
);
17319 if (die
->child
!= NULL
)
17321 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17322 struct die_info
*child_die
;
17323 int nparams
, iparams
;
17325 /* Count the number of parameters.
17326 FIXME: GDB currently ignores vararg functions, but knows about
17327 vararg member functions. */
17329 child_die
= die
->child
;
17330 while (child_die
&& child_die
->tag
)
17332 if (child_die
->tag
== DW_TAG_formal_parameter
)
17334 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17335 TYPE_VARARGS (ftype
) = 1;
17336 child_die
= sibling_die (child_die
);
17339 /* Allocate storage for parameters and fill them in. */
17340 TYPE_NFIELDS (ftype
) = nparams
;
17341 TYPE_FIELDS (ftype
) = (struct field
*)
17342 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17344 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17345 even if we error out during the parameters reading below. */
17346 for (iparams
= 0; iparams
< nparams
; iparams
++)
17347 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17350 child_die
= die
->child
;
17351 while (child_die
&& child_die
->tag
)
17353 if (child_die
->tag
== DW_TAG_formal_parameter
)
17355 struct type
*arg_type
;
17357 /* DWARF version 2 has no clean way to discern C++
17358 static and non-static member functions. G++ helps
17359 GDB by marking the first parameter for non-static
17360 member functions (which is the this pointer) as
17361 artificial. We pass this information to
17362 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17364 DWARF version 3 added DW_AT_object_pointer, which GCC
17365 4.5 does not yet generate. */
17366 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17368 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17370 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17371 arg_type
= die_type (child_die
, cu
);
17373 /* RealView does not mark THIS as const, which the testsuite
17374 expects. GCC marks THIS as const in method definitions,
17375 but not in the class specifications (GCC PR 43053). */
17376 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17377 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17380 struct dwarf2_cu
*arg_cu
= cu
;
17381 const char *name
= dwarf2_name (child_die
, cu
);
17383 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17386 /* If the compiler emits this, use it. */
17387 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17390 else if (name
&& strcmp (name
, "this") == 0)
17391 /* Function definitions will have the argument names. */
17393 else if (name
== NULL
&& iparams
== 0)
17394 /* Declarations may not have the names, so like
17395 elsewhere in GDB, assume an artificial first
17396 argument is "this". */
17400 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17404 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17407 child_die
= sibling_die (child_die
);
17414 static struct type
*
17415 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17417 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17418 const char *name
= NULL
;
17419 struct type
*this_type
, *target_type
;
17421 name
= dwarf2_full_name (NULL
, die
, cu
);
17422 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17423 TYPE_TARGET_STUB (this_type
) = 1;
17424 set_die_type (die
, this_type
, cu
);
17425 target_type
= die_type (die
, cu
);
17426 if (target_type
!= this_type
)
17427 TYPE_TARGET_TYPE (this_type
) = target_type
;
17430 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17431 spec and cause infinite loops in GDB. */
17432 complaint (_("Self-referential DW_TAG_typedef "
17433 "- DIE at %s [in module %s]"),
17434 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17435 TYPE_TARGET_TYPE (this_type
) = NULL
;
17440 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17441 (which may be different from NAME) to the architecture back-end to allow
17442 it to guess the correct format if necessary. */
17444 static struct type
*
17445 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17446 const char *name_hint
)
17448 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17449 const struct floatformat
**format
;
17452 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17454 type
= init_float_type (objfile
, bits
, name
, format
);
17456 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17461 /* Allocate an integer type of size BITS and name NAME. */
17463 static struct type
*
17464 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17465 int bits
, int unsigned_p
, const char *name
)
17469 /* Versions of Intel's C Compiler generate an integer type called "void"
17470 instead of using DW_TAG_unspecified_type. This has been seen on
17471 at least versions 14, 17, and 18. */
17472 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17473 && strcmp (name
, "void") == 0)
17474 type
= objfile_type (objfile
)->builtin_void
;
17476 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17481 /* Initialise and return a floating point type of size BITS suitable for
17482 use as a component of a complex number. The NAME_HINT is passed through
17483 when initialising the floating point type and is the name of the complex
17486 As DWARF doesn't currently provide an explicit name for the components
17487 of a complex number, but it can be helpful to have these components
17488 named, we try to select a suitable name based on the size of the
17490 static struct type
*
17491 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17492 struct objfile
*objfile
,
17493 int bits
, const char *name_hint
)
17495 gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17496 struct type
*tt
= nullptr;
17498 /* Try to find a suitable floating point builtin type of size BITS.
17499 We're going to use the name of this type as the name for the complex
17500 target type that we are about to create. */
17501 switch (cu
->language
)
17503 case language_fortran
:
17507 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17510 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17512 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17514 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17522 tt
= builtin_type (gdbarch
)->builtin_float
;
17525 tt
= builtin_type (gdbarch
)->builtin_double
;
17527 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17529 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17535 /* If the type we found doesn't match the size we were looking for, then
17536 pretend we didn't find a type at all, the complex target type we
17537 create will then be nameless. */
17538 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17541 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
17542 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
);
17545 /* Find a representation of a given base type and install
17546 it in the TYPE field of the die. */
17548 static struct type
*
17549 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17551 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17553 struct attribute
*attr
;
17554 int encoding
= 0, bits
= 0;
17557 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17560 encoding
= DW_UNSND (attr
);
17562 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17565 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17567 name
= dwarf2_name (die
, cu
);
17570 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17575 case DW_ATE_address
:
17576 /* Turn DW_ATE_address into a void * pointer. */
17577 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17578 type
= init_pointer_type (objfile
, bits
, name
, type
);
17580 case DW_ATE_boolean
:
17581 type
= init_boolean_type (objfile
, bits
, 1, name
);
17583 case DW_ATE_complex_float
:
17584 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
);
17585 type
= init_complex_type (objfile
, name
, type
);
17587 case DW_ATE_decimal_float
:
17588 type
= init_decfloat_type (objfile
, bits
, name
);
17591 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17593 case DW_ATE_signed
:
17594 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17596 case DW_ATE_unsigned
:
17597 if (cu
->language
== language_fortran
17599 && startswith (name
, "character("))
17600 type
= init_character_type (objfile
, bits
, 1, name
);
17602 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17604 case DW_ATE_signed_char
:
17605 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17606 || cu
->language
== language_pascal
17607 || cu
->language
== language_fortran
)
17608 type
= init_character_type (objfile
, bits
, 0, name
);
17610 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17612 case DW_ATE_unsigned_char
:
17613 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17614 || cu
->language
== language_pascal
17615 || cu
->language
== language_fortran
17616 || cu
->language
== language_rust
)
17617 type
= init_character_type (objfile
, bits
, 1, name
);
17619 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17623 gdbarch
*arch
= get_objfile_arch (objfile
);
17626 type
= builtin_type (arch
)->builtin_char16
;
17627 else if (bits
== 32)
17628 type
= builtin_type (arch
)->builtin_char32
;
17631 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17633 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17635 return set_die_type (die
, type
, cu
);
17640 complaint (_("unsupported DW_AT_encoding: '%s'"),
17641 dwarf_type_encoding_name (encoding
));
17642 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17646 if (name
&& strcmp (name
, "char") == 0)
17647 TYPE_NOSIGN (type
) = 1;
17649 maybe_set_alignment (cu
, die
, type
);
17651 return set_die_type (die
, type
, cu
);
17654 /* Parse dwarf attribute if it's a block, reference or constant and put the
17655 resulting value of the attribute into struct bound_prop.
17656 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17659 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17660 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
17662 struct dwarf2_property_baton
*baton
;
17663 struct obstack
*obstack
17664 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17666 if (attr
== NULL
|| prop
== NULL
)
17669 if (attr_form_is_block (attr
))
17671 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17672 baton
->referenced_type
= NULL
;
17673 baton
->locexpr
.per_cu
= cu
->per_cu
;
17674 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17675 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17676 prop
->data
.baton
= baton
;
17677 prop
->kind
= PROP_LOCEXPR
;
17678 gdb_assert (prop
->data
.baton
!= NULL
);
17680 else if (attr_form_is_ref (attr
))
17682 struct dwarf2_cu
*target_cu
= cu
;
17683 struct die_info
*target_die
;
17684 struct attribute
*target_attr
;
17686 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17687 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17688 if (target_attr
== NULL
)
17689 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17691 if (target_attr
== NULL
)
17694 switch (target_attr
->name
)
17696 case DW_AT_location
:
17697 if (attr_form_is_section_offset (target_attr
))
17699 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17700 baton
->referenced_type
= die_type (target_die
, target_cu
);
17701 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17702 prop
->data
.baton
= baton
;
17703 prop
->kind
= PROP_LOCLIST
;
17704 gdb_assert (prop
->data
.baton
!= NULL
);
17706 else if (attr_form_is_block (target_attr
))
17708 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17709 baton
->referenced_type
= die_type (target_die
, target_cu
);
17710 baton
->locexpr
.per_cu
= cu
->per_cu
;
17711 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17712 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17713 prop
->data
.baton
= baton
;
17714 prop
->kind
= PROP_LOCEXPR
;
17715 gdb_assert (prop
->data
.baton
!= NULL
);
17719 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17720 "dynamic property");
17724 case DW_AT_data_member_location
:
17728 if (!handle_data_member_location (target_die
, target_cu
,
17732 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17733 baton
->referenced_type
= read_type_die (target_die
->parent
,
17735 baton
->offset_info
.offset
= offset
;
17736 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17737 prop
->data
.baton
= baton
;
17738 prop
->kind
= PROP_ADDR_OFFSET
;
17743 else if (attr_form_is_constant (attr
))
17745 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17746 prop
->kind
= PROP_CONST
;
17750 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17751 dwarf2_name (die
, cu
));
17758 /* Read the given DW_AT_subrange DIE. */
17760 static struct type
*
17761 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17763 struct type
*base_type
, *orig_base_type
;
17764 struct type
*range_type
;
17765 struct attribute
*attr
;
17766 struct dynamic_prop low
, high
;
17767 int low_default_is_valid
;
17768 int high_bound_is_count
= 0;
17770 ULONGEST negative_mask
;
17772 orig_base_type
= die_type (die
, cu
);
17773 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17774 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17775 creating the range type, but we use the result of check_typedef
17776 when examining properties of the type. */
17777 base_type
= check_typedef (orig_base_type
);
17779 /* The die_type call above may have already set the type for this DIE. */
17780 range_type
= get_die_type (die
, cu
);
17784 low
.kind
= PROP_CONST
;
17785 high
.kind
= PROP_CONST
;
17786 high
.data
.const_val
= 0;
17788 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17789 omitting DW_AT_lower_bound. */
17790 switch (cu
->language
)
17793 case language_cplus
:
17794 low
.data
.const_val
= 0;
17795 low_default_is_valid
= 1;
17797 case language_fortran
:
17798 low
.data
.const_val
= 1;
17799 low_default_is_valid
= 1;
17802 case language_objc
:
17803 case language_rust
:
17804 low
.data
.const_val
= 0;
17805 low_default_is_valid
= (cu
->header
.version
>= 4);
17809 case language_pascal
:
17810 low
.data
.const_val
= 1;
17811 low_default_is_valid
= (cu
->header
.version
>= 4);
17814 low
.data
.const_val
= 0;
17815 low_default_is_valid
= 0;
17819 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17821 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
17822 else if (!low_default_is_valid
)
17823 complaint (_("Missing DW_AT_lower_bound "
17824 "- DIE at %s [in module %s]"),
17825 sect_offset_str (die
->sect_off
),
17826 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17828 struct attribute
*attr_ub
, *attr_count
;
17829 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17830 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17832 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17833 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17835 /* If bounds are constant do the final calculation here. */
17836 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17837 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17839 high_bound_is_count
= 1;
17843 if (attr_ub
!= NULL
)
17844 complaint (_("Unresolved DW_AT_upper_bound "
17845 "- DIE at %s [in module %s]"),
17846 sect_offset_str (die
->sect_off
),
17847 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17848 if (attr_count
!= NULL
)
17849 complaint (_("Unresolved DW_AT_count "
17850 "- DIE at %s [in module %s]"),
17851 sect_offset_str (die
->sect_off
),
17852 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17857 /* Dwarf-2 specifications explicitly allows to create subrange types
17858 without specifying a base type.
17859 In that case, the base type must be set to the type of
17860 the lower bound, upper bound or count, in that order, if any of these
17861 three attributes references an object that has a type.
17862 If no base type is found, the Dwarf-2 specifications say that
17863 a signed integer type of size equal to the size of an address should
17865 For the following C code: `extern char gdb_int [];'
17866 GCC produces an empty range DIE.
17867 FIXME: muller/2010-05-28: Possible references to object for low bound,
17868 high bound or count are not yet handled by this code. */
17869 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
17871 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17872 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17873 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
17874 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
17876 /* Test "int", "long int", and "long long int" objfile types,
17877 and select the first one having a size above or equal to the
17878 architecture address size. */
17879 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17880 base_type
= int_type
;
17883 int_type
= objfile_type (objfile
)->builtin_long
;
17884 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17885 base_type
= int_type
;
17888 int_type
= objfile_type (objfile
)->builtin_long_long
;
17889 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17890 base_type
= int_type
;
17895 /* Normally, the DWARF producers are expected to use a signed
17896 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17897 But this is unfortunately not always the case, as witnessed
17898 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17899 is used instead. To work around that ambiguity, we treat
17900 the bounds as signed, and thus sign-extend their values, when
17901 the base type is signed. */
17903 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17904 if (low
.kind
== PROP_CONST
17905 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17906 low
.data
.const_val
|= negative_mask
;
17907 if (high
.kind
== PROP_CONST
17908 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17909 high
.data
.const_val
|= negative_mask
;
17911 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17913 if (high_bound_is_count
)
17914 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17916 /* Ada expects an empty array on no boundary attributes. */
17917 if (attr
== NULL
&& cu
->language
!= language_ada
)
17918 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17920 name
= dwarf2_name (die
, cu
);
17922 TYPE_NAME (range_type
) = name
;
17924 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17926 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17928 maybe_set_alignment (cu
, die
, range_type
);
17930 set_die_type (die
, range_type
, cu
);
17932 /* set_die_type should be already done. */
17933 set_descriptive_type (range_type
, die
, cu
);
17938 static struct type
*
17939 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17943 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17945 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17947 /* In Ada, an unspecified type is typically used when the description
17948 of the type is defered to a different unit. When encountering
17949 such a type, we treat it as a stub, and try to resolve it later on,
17951 if (cu
->language
== language_ada
)
17952 TYPE_STUB (type
) = 1;
17954 return set_die_type (die
, type
, cu
);
17957 /* Read a single die and all its descendents. Set the die's sibling
17958 field to NULL; set other fields in the die correctly, and set all
17959 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17960 location of the info_ptr after reading all of those dies. PARENT
17961 is the parent of the die in question. */
17963 static struct die_info
*
17964 read_die_and_children (const struct die_reader_specs
*reader
,
17965 const gdb_byte
*info_ptr
,
17966 const gdb_byte
**new_info_ptr
,
17967 struct die_info
*parent
)
17969 struct die_info
*die
;
17970 const gdb_byte
*cur_ptr
;
17973 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
17976 *new_info_ptr
= cur_ptr
;
17979 store_in_ref_table (die
, reader
->cu
);
17982 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17986 *new_info_ptr
= cur_ptr
;
17989 die
->sibling
= NULL
;
17990 die
->parent
= parent
;
17994 /* Read a die, all of its descendents, and all of its siblings; set
17995 all of the fields of all of the dies correctly. Arguments are as
17996 in read_die_and_children. */
17998 static struct die_info
*
17999 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
18000 const gdb_byte
*info_ptr
,
18001 const gdb_byte
**new_info_ptr
,
18002 struct die_info
*parent
)
18004 struct die_info
*first_die
, *last_sibling
;
18005 const gdb_byte
*cur_ptr
;
18007 cur_ptr
= info_ptr
;
18008 first_die
= last_sibling
= NULL
;
18012 struct die_info
*die
18013 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
18017 *new_info_ptr
= cur_ptr
;
18024 last_sibling
->sibling
= die
;
18026 last_sibling
= die
;
18030 /* Read a die, all of its descendents, and all of its siblings; set
18031 all of the fields of all of the dies correctly. Arguments are as
18032 in read_die_and_children.
18033 This the main entry point for reading a DIE and all its children. */
18035 static struct die_info
*
18036 read_die_and_siblings (const struct die_reader_specs
*reader
,
18037 const gdb_byte
*info_ptr
,
18038 const gdb_byte
**new_info_ptr
,
18039 struct die_info
*parent
)
18041 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
18042 new_info_ptr
, parent
);
18044 if (dwarf_die_debug
)
18046 fprintf_unfiltered (gdb_stdlog
,
18047 "Read die from %s@0x%x of %s:\n",
18048 get_section_name (reader
->die_section
),
18049 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18050 bfd_get_filename (reader
->abfd
));
18051 dump_die (die
, dwarf_die_debug
);
18057 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
18059 The caller is responsible for filling in the extra attributes
18060 and updating (*DIEP)->num_attrs.
18061 Set DIEP to point to a newly allocated die with its information,
18062 except for its child, sibling, and parent fields.
18063 Set HAS_CHILDREN to tell whether the die has children or not. */
18065 static const gdb_byte
*
18066 read_full_die_1 (const struct die_reader_specs
*reader
,
18067 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18068 int *has_children
, int num_extra_attrs
)
18070 unsigned int abbrev_number
, bytes_read
, i
;
18071 struct abbrev_info
*abbrev
;
18072 struct die_info
*die
;
18073 struct dwarf2_cu
*cu
= reader
->cu
;
18074 bfd
*abfd
= reader
->abfd
;
18076 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
18077 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18078 info_ptr
+= bytes_read
;
18079 if (!abbrev_number
)
18086 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
18088 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
18090 bfd_get_filename (abfd
));
18092 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
18093 die
->sect_off
= sect_off
;
18094 die
->tag
= abbrev
->tag
;
18095 die
->abbrev
= abbrev_number
;
18097 /* Make the result usable.
18098 The caller needs to update num_attrs after adding the extra
18100 die
->num_attrs
= abbrev
->num_attrs
;
18102 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18103 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
18107 *has_children
= abbrev
->has_children
;
18111 /* Read a die and all its attributes.
18112 Set DIEP to point to a newly allocated die with its information,
18113 except for its child, sibling, and parent fields.
18114 Set HAS_CHILDREN to tell whether the die has children or not. */
18116 static const gdb_byte
*
18117 read_full_die (const struct die_reader_specs
*reader
,
18118 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18121 const gdb_byte
*result
;
18123 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
18125 if (dwarf_die_debug
)
18127 fprintf_unfiltered (gdb_stdlog
,
18128 "Read die from %s@0x%x of %s:\n",
18129 get_section_name (reader
->die_section
),
18130 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18131 bfd_get_filename (reader
->abfd
));
18132 dump_die (*diep
, dwarf_die_debug
);
18138 /* Abbreviation tables.
18140 In DWARF version 2, the description of the debugging information is
18141 stored in a separate .debug_abbrev section. Before we read any
18142 dies from a section we read in all abbreviations and install them
18143 in a hash table. */
18145 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
18147 struct abbrev_info
*
18148 abbrev_table::alloc_abbrev ()
18150 struct abbrev_info
*abbrev
;
18152 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
18153 memset (abbrev
, 0, sizeof (struct abbrev_info
));
18158 /* Add an abbreviation to the table. */
18161 abbrev_table::add_abbrev (unsigned int abbrev_number
,
18162 struct abbrev_info
*abbrev
)
18164 unsigned int hash_number
;
18166 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18167 abbrev
->next
= m_abbrevs
[hash_number
];
18168 m_abbrevs
[hash_number
] = abbrev
;
18171 /* Look up an abbrev in the table.
18172 Returns NULL if the abbrev is not found. */
18174 struct abbrev_info
*
18175 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
18177 unsigned int hash_number
;
18178 struct abbrev_info
*abbrev
;
18180 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18181 abbrev
= m_abbrevs
[hash_number
];
18185 if (abbrev
->number
== abbrev_number
)
18187 abbrev
= abbrev
->next
;
18192 /* Read in an abbrev table. */
18194 static abbrev_table_up
18195 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18196 struct dwarf2_section_info
*section
,
18197 sect_offset sect_off
)
18199 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18200 bfd
*abfd
= get_section_bfd_owner (section
);
18201 const gdb_byte
*abbrev_ptr
;
18202 struct abbrev_info
*cur_abbrev
;
18203 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
18204 unsigned int abbrev_form
;
18205 struct attr_abbrev
*cur_attrs
;
18206 unsigned int allocated_attrs
;
18208 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
18210 dwarf2_read_section (objfile
, section
);
18211 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
18212 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18213 abbrev_ptr
+= bytes_read
;
18215 allocated_attrs
= ATTR_ALLOC_CHUNK
;
18216 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
18218 /* Loop until we reach an abbrev number of 0. */
18219 while (abbrev_number
)
18221 cur_abbrev
= abbrev_table
->alloc_abbrev ();
18223 /* read in abbrev header */
18224 cur_abbrev
->number
= abbrev_number
;
18226 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18227 abbrev_ptr
+= bytes_read
;
18228 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18231 /* now read in declarations */
18234 LONGEST implicit_const
;
18236 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18237 abbrev_ptr
+= bytes_read
;
18238 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18239 abbrev_ptr
+= bytes_read
;
18240 if (abbrev_form
== DW_FORM_implicit_const
)
18242 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18244 abbrev_ptr
+= bytes_read
;
18248 /* Initialize it due to a false compiler warning. */
18249 implicit_const
= -1;
18252 if (abbrev_name
== 0)
18255 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18257 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18259 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18262 cur_attrs
[cur_abbrev
->num_attrs
].name
18263 = (enum dwarf_attribute
) abbrev_name
;
18264 cur_attrs
[cur_abbrev
->num_attrs
].form
18265 = (enum dwarf_form
) abbrev_form
;
18266 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18267 ++cur_abbrev
->num_attrs
;
18270 cur_abbrev
->attrs
=
18271 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18272 cur_abbrev
->num_attrs
);
18273 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18274 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18276 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18278 /* Get next abbreviation.
18279 Under Irix6 the abbreviations for a compilation unit are not
18280 always properly terminated with an abbrev number of 0.
18281 Exit loop if we encounter an abbreviation which we have
18282 already read (which means we are about to read the abbreviations
18283 for the next compile unit) or if the end of the abbreviation
18284 table is reached. */
18285 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18287 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18288 abbrev_ptr
+= bytes_read
;
18289 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18294 return abbrev_table
;
18297 /* Returns nonzero if TAG represents a type that we might generate a partial
18301 is_type_tag_for_partial (int tag
)
18306 /* Some types that would be reasonable to generate partial symbols for,
18307 that we don't at present. */
18308 case DW_TAG_array_type
:
18309 case DW_TAG_file_type
:
18310 case DW_TAG_ptr_to_member_type
:
18311 case DW_TAG_set_type
:
18312 case DW_TAG_string_type
:
18313 case DW_TAG_subroutine_type
:
18315 case DW_TAG_base_type
:
18316 case DW_TAG_class_type
:
18317 case DW_TAG_interface_type
:
18318 case DW_TAG_enumeration_type
:
18319 case DW_TAG_structure_type
:
18320 case DW_TAG_subrange_type
:
18321 case DW_TAG_typedef
:
18322 case DW_TAG_union_type
:
18329 /* Load all DIEs that are interesting for partial symbols into memory. */
18331 static struct partial_die_info
*
18332 load_partial_dies (const struct die_reader_specs
*reader
,
18333 const gdb_byte
*info_ptr
, int building_psymtab
)
18335 struct dwarf2_cu
*cu
= reader
->cu
;
18336 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18337 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18338 unsigned int bytes_read
;
18339 unsigned int load_all
= 0;
18340 int nesting_level
= 1;
18345 gdb_assert (cu
->per_cu
!= NULL
);
18346 if (cu
->per_cu
->load_all_dies
)
18350 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18354 &cu
->comp_unit_obstack
,
18355 hashtab_obstack_allocate
,
18356 dummy_obstack_deallocate
);
18360 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18362 /* A NULL abbrev means the end of a series of children. */
18363 if (abbrev
== NULL
)
18365 if (--nesting_level
== 0)
18368 info_ptr
+= bytes_read
;
18369 last_die
= parent_die
;
18370 parent_die
= parent_die
->die_parent
;
18374 /* Check for template arguments. We never save these; if
18375 they're seen, we just mark the parent, and go on our way. */
18376 if (parent_die
!= NULL
18377 && cu
->language
== language_cplus
18378 && (abbrev
->tag
== DW_TAG_template_type_param
18379 || abbrev
->tag
== DW_TAG_template_value_param
))
18381 parent_die
->has_template_arguments
= 1;
18385 /* We don't need a partial DIE for the template argument. */
18386 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18391 /* We only recurse into c++ subprograms looking for template arguments.
18392 Skip their other children. */
18394 && cu
->language
== language_cplus
18395 && parent_die
!= NULL
18396 && parent_die
->tag
== DW_TAG_subprogram
)
18398 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18402 /* Check whether this DIE is interesting enough to save. Normally
18403 we would not be interested in members here, but there may be
18404 later variables referencing them via DW_AT_specification (for
18405 static members). */
18407 && !is_type_tag_for_partial (abbrev
->tag
)
18408 && abbrev
->tag
!= DW_TAG_constant
18409 && abbrev
->tag
!= DW_TAG_enumerator
18410 && abbrev
->tag
!= DW_TAG_subprogram
18411 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18412 && abbrev
->tag
!= DW_TAG_lexical_block
18413 && abbrev
->tag
!= DW_TAG_variable
18414 && abbrev
->tag
!= DW_TAG_namespace
18415 && abbrev
->tag
!= DW_TAG_module
18416 && abbrev
->tag
!= DW_TAG_member
18417 && abbrev
->tag
!= DW_TAG_imported_unit
18418 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18420 /* Otherwise we skip to the next sibling, if any. */
18421 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18425 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18428 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18430 /* This two-pass algorithm for processing partial symbols has a
18431 high cost in cache pressure. Thus, handle some simple cases
18432 here which cover the majority of C partial symbols. DIEs
18433 which neither have specification tags in them, nor could have
18434 specification tags elsewhere pointing at them, can simply be
18435 processed and discarded.
18437 This segment is also optional; scan_partial_symbols and
18438 add_partial_symbol will handle these DIEs if we chain
18439 them in normally. When compilers which do not emit large
18440 quantities of duplicate debug information are more common,
18441 this code can probably be removed. */
18443 /* Any complete simple types at the top level (pretty much all
18444 of them, for a language without namespaces), can be processed
18446 if (parent_die
== NULL
18447 && pdi
.has_specification
== 0
18448 && pdi
.is_declaration
== 0
18449 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18450 || pdi
.tag
== DW_TAG_base_type
18451 || pdi
.tag
== DW_TAG_subrange_type
))
18453 if (building_psymtab
&& pdi
.name
!= NULL
)
18454 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18455 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18456 psymbol_placement::STATIC
,
18457 0, cu
->language
, objfile
);
18458 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18462 /* The exception for DW_TAG_typedef with has_children above is
18463 a workaround of GCC PR debug/47510. In the case of this complaint
18464 type_name_or_error will error on such types later.
18466 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18467 it could not find the child DIEs referenced later, this is checked
18468 above. In correct DWARF DW_TAG_typedef should have no children. */
18470 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18471 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18472 "- DIE at %s [in module %s]"),
18473 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18475 /* If we're at the second level, and we're an enumerator, and
18476 our parent has no specification (meaning possibly lives in a
18477 namespace elsewhere), then we can add the partial symbol now
18478 instead of queueing it. */
18479 if (pdi
.tag
== DW_TAG_enumerator
18480 && parent_die
!= NULL
18481 && parent_die
->die_parent
== NULL
18482 && parent_die
->tag
== DW_TAG_enumeration_type
18483 && parent_die
->has_specification
== 0)
18485 if (pdi
.name
== NULL
)
18486 complaint (_("malformed enumerator DIE ignored"));
18487 else if (building_psymtab
)
18488 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18489 VAR_DOMAIN
, LOC_CONST
, -1,
18490 cu
->language
== language_cplus
18491 ? psymbol_placement::GLOBAL
18492 : psymbol_placement::STATIC
,
18493 0, cu
->language
, objfile
);
18495 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18499 struct partial_die_info
*part_die
18500 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18502 /* We'll save this DIE so link it in. */
18503 part_die
->die_parent
= parent_die
;
18504 part_die
->die_sibling
= NULL
;
18505 part_die
->die_child
= NULL
;
18507 if (last_die
&& last_die
== parent_die
)
18508 last_die
->die_child
= part_die
;
18510 last_die
->die_sibling
= part_die
;
18512 last_die
= part_die
;
18514 if (first_die
== NULL
)
18515 first_die
= part_die
;
18517 /* Maybe add the DIE to the hash table. Not all DIEs that we
18518 find interesting need to be in the hash table, because we
18519 also have the parent/sibling/child chains; only those that we
18520 might refer to by offset later during partial symbol reading.
18522 For now this means things that might have be the target of a
18523 DW_AT_specification, DW_AT_abstract_origin, or
18524 DW_AT_extension. DW_AT_extension will refer only to
18525 namespaces; DW_AT_abstract_origin refers to functions (and
18526 many things under the function DIE, but we do not recurse
18527 into function DIEs during partial symbol reading) and
18528 possibly variables as well; DW_AT_specification refers to
18529 declarations. Declarations ought to have the DW_AT_declaration
18530 flag. It happens that GCC forgets to put it in sometimes, but
18531 only for functions, not for types.
18533 Adding more things than necessary to the hash table is harmless
18534 except for the performance cost. Adding too few will result in
18535 wasted time in find_partial_die, when we reread the compilation
18536 unit with load_all_dies set. */
18539 || abbrev
->tag
== DW_TAG_constant
18540 || abbrev
->tag
== DW_TAG_subprogram
18541 || abbrev
->tag
== DW_TAG_variable
18542 || abbrev
->tag
== DW_TAG_namespace
18543 || part_die
->is_declaration
)
18547 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18548 to_underlying (part_die
->sect_off
),
18553 /* For some DIEs we want to follow their children (if any). For C
18554 we have no reason to follow the children of structures; for other
18555 languages we have to, so that we can get at method physnames
18556 to infer fully qualified class names, for DW_AT_specification,
18557 and for C++ template arguments. For C++, we also look one level
18558 inside functions to find template arguments (if the name of the
18559 function does not already contain the template arguments).
18561 For Ada, we need to scan the children of subprograms and lexical
18562 blocks as well because Ada allows the definition of nested
18563 entities that could be interesting for the debugger, such as
18564 nested subprograms for instance. */
18565 if (last_die
->has_children
18567 || last_die
->tag
== DW_TAG_namespace
18568 || last_die
->tag
== DW_TAG_module
18569 || last_die
->tag
== DW_TAG_enumeration_type
18570 || (cu
->language
== language_cplus
18571 && last_die
->tag
== DW_TAG_subprogram
18572 && (last_die
->name
== NULL
18573 || strchr (last_die
->name
, '<') == NULL
))
18574 || (cu
->language
!= language_c
18575 && (last_die
->tag
== DW_TAG_class_type
18576 || last_die
->tag
== DW_TAG_interface_type
18577 || last_die
->tag
== DW_TAG_structure_type
18578 || last_die
->tag
== DW_TAG_union_type
))
18579 || (cu
->language
== language_ada
18580 && (last_die
->tag
== DW_TAG_subprogram
18581 || last_die
->tag
== DW_TAG_lexical_block
))))
18584 parent_die
= last_die
;
18588 /* Otherwise we skip to the next sibling, if any. */
18589 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18591 /* Back to the top, do it again. */
18595 partial_die_info::partial_die_info (sect_offset sect_off_
,
18596 struct abbrev_info
*abbrev
)
18597 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18601 /* Read a minimal amount of information into the minimal die structure.
18602 INFO_PTR should point just after the initial uleb128 of a DIE. */
18605 partial_die_info::read (const struct die_reader_specs
*reader
,
18606 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18608 struct dwarf2_cu
*cu
= reader
->cu
;
18609 struct dwarf2_per_objfile
*dwarf2_per_objfile
18610 = cu
->per_cu
->dwarf2_per_objfile
;
18612 int has_low_pc_attr
= 0;
18613 int has_high_pc_attr
= 0;
18614 int high_pc_relative
= 0;
18616 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18618 struct attribute attr
;
18620 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18622 /* Store the data if it is of an attribute we want to keep in a
18623 partial symbol table. */
18629 case DW_TAG_compile_unit
:
18630 case DW_TAG_partial_unit
:
18631 case DW_TAG_type_unit
:
18632 /* Compilation units have a DW_AT_name that is a filename, not
18633 a source language identifier. */
18634 case DW_TAG_enumeration_type
:
18635 case DW_TAG_enumerator
:
18636 /* These tags always have simple identifiers already; no need
18637 to canonicalize them. */
18638 name
= DW_STRING (&attr
);
18642 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18645 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18646 &objfile
->per_bfd
->storage_obstack
);
18651 case DW_AT_linkage_name
:
18652 case DW_AT_MIPS_linkage_name
:
18653 /* Note that both forms of linkage name might appear. We
18654 assume they will be the same, and we only store the last
18656 if (cu
->language
== language_ada
)
18657 name
= DW_STRING (&attr
);
18658 linkage_name
= DW_STRING (&attr
);
18661 has_low_pc_attr
= 1;
18662 lowpc
= attr_value_as_address (&attr
);
18664 case DW_AT_high_pc
:
18665 has_high_pc_attr
= 1;
18666 highpc
= attr_value_as_address (&attr
);
18667 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18668 high_pc_relative
= 1;
18670 case DW_AT_location
:
18671 /* Support the .debug_loc offsets. */
18672 if (attr_form_is_block (&attr
))
18674 d
.locdesc
= DW_BLOCK (&attr
);
18676 else if (attr_form_is_section_offset (&attr
))
18678 dwarf2_complex_location_expr_complaint ();
18682 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18683 "partial symbol information");
18686 case DW_AT_external
:
18687 is_external
= DW_UNSND (&attr
);
18689 case DW_AT_declaration
:
18690 is_declaration
= DW_UNSND (&attr
);
18695 case DW_AT_abstract_origin
:
18696 case DW_AT_specification
:
18697 case DW_AT_extension
:
18698 has_specification
= 1;
18699 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18700 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18701 || cu
->per_cu
->is_dwz
);
18703 case DW_AT_sibling
:
18704 /* Ignore absolute siblings, they might point outside of
18705 the current compile unit. */
18706 if (attr
.form
== DW_FORM_ref_addr
)
18707 complaint (_("ignoring absolute DW_AT_sibling"));
18710 const gdb_byte
*buffer
= reader
->buffer
;
18711 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18712 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18714 if (sibling_ptr
< info_ptr
)
18715 complaint (_("DW_AT_sibling points backwards"));
18716 else if (sibling_ptr
> reader
->buffer_end
)
18717 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18719 sibling
= sibling_ptr
;
18722 case DW_AT_byte_size
:
18725 case DW_AT_const_value
:
18726 has_const_value
= 1;
18728 case DW_AT_calling_convention
:
18729 /* DWARF doesn't provide a way to identify a program's source-level
18730 entry point. DW_AT_calling_convention attributes are only meant
18731 to describe functions' calling conventions.
18733 However, because it's a necessary piece of information in
18734 Fortran, and before DWARF 4 DW_CC_program was the only
18735 piece of debugging information whose definition refers to
18736 a 'main program' at all, several compilers marked Fortran
18737 main programs with DW_CC_program --- even when those
18738 functions use the standard calling conventions.
18740 Although DWARF now specifies a way to provide this
18741 information, we support this practice for backward
18743 if (DW_UNSND (&attr
) == DW_CC_program
18744 && cu
->language
== language_fortran
)
18745 main_subprogram
= 1;
18748 if (DW_UNSND (&attr
) == DW_INL_inlined
18749 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18750 may_be_inlined
= 1;
18754 if (tag
== DW_TAG_imported_unit
)
18756 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18757 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18758 || cu
->per_cu
->is_dwz
);
18762 case DW_AT_main_subprogram
:
18763 main_subprogram
= DW_UNSND (&attr
);
18768 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18769 but that requires a full DIE, so instead we just
18771 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18772 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18773 + (need_ranges_base
18777 /* Value of the DW_AT_ranges attribute is the offset in the
18778 .debug_ranges section. */
18779 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18790 if (high_pc_relative
)
18793 if (has_low_pc_attr
&& has_high_pc_attr
)
18795 /* When using the GNU linker, .gnu.linkonce. sections are used to
18796 eliminate duplicate copies of functions and vtables and such.
18797 The linker will arbitrarily choose one and discard the others.
18798 The AT_*_pc values for such functions refer to local labels in
18799 these sections. If the section from that file was discarded, the
18800 labels are not in the output, so the relocs get a value of 0.
18801 If this is a discarded function, mark the pc bounds as invalid,
18802 so that GDB will ignore it. */
18803 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18805 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18806 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18808 complaint (_("DW_AT_low_pc %s is zero "
18809 "for DIE at %s [in module %s]"),
18810 paddress (gdbarch
, lowpc
),
18811 sect_offset_str (sect_off
),
18812 objfile_name (objfile
));
18814 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18815 else if (lowpc
>= highpc
)
18817 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18818 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18820 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18821 "for DIE at %s [in module %s]"),
18822 paddress (gdbarch
, lowpc
),
18823 paddress (gdbarch
, highpc
),
18824 sect_offset_str (sect_off
),
18825 objfile_name (objfile
));
18834 /* Find a cached partial DIE at OFFSET in CU. */
18836 struct partial_die_info
*
18837 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18839 struct partial_die_info
*lookup_die
= NULL
;
18840 struct partial_die_info
part_die (sect_off
);
18842 lookup_die
= ((struct partial_die_info
*)
18843 htab_find_with_hash (partial_dies
, &part_die
,
18844 to_underlying (sect_off
)));
18849 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18850 except in the case of .debug_types DIEs which do not reference
18851 outside their CU (they do however referencing other types via
18852 DW_FORM_ref_sig8). */
18854 static const struct cu_partial_die_info
18855 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18857 struct dwarf2_per_objfile
*dwarf2_per_objfile
18858 = cu
->per_cu
->dwarf2_per_objfile
;
18859 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18860 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18861 struct partial_die_info
*pd
= NULL
;
18863 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18864 && offset_in_cu_p (&cu
->header
, sect_off
))
18866 pd
= cu
->find_partial_die (sect_off
);
18869 /* We missed recording what we needed.
18870 Load all dies and try again. */
18871 per_cu
= cu
->per_cu
;
18875 /* TUs don't reference other CUs/TUs (except via type signatures). */
18876 if (cu
->per_cu
->is_debug_types
)
18878 error (_("Dwarf Error: Type Unit at offset %s contains"
18879 " external reference to offset %s [in module %s].\n"),
18880 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18881 bfd_get_filename (objfile
->obfd
));
18883 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18884 dwarf2_per_objfile
);
18886 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18887 load_partial_comp_unit (per_cu
);
18889 per_cu
->cu
->last_used
= 0;
18890 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18893 /* If we didn't find it, and not all dies have been loaded,
18894 load them all and try again. */
18896 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18898 per_cu
->load_all_dies
= 1;
18900 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18901 THIS_CU->cu may already be in use. So we can't just free it and
18902 replace its DIEs with the ones we read in. Instead, we leave those
18903 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18904 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18906 load_partial_comp_unit (per_cu
);
18908 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18912 internal_error (__FILE__
, __LINE__
,
18913 _("could not find partial DIE %s "
18914 "in cache [from module %s]\n"),
18915 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18916 return { per_cu
->cu
, pd
};
18919 /* See if we can figure out if the class lives in a namespace. We do
18920 this by looking for a member function; its demangled name will
18921 contain namespace info, if there is any. */
18924 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18925 struct dwarf2_cu
*cu
)
18927 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18928 what template types look like, because the demangler
18929 frequently doesn't give the same name as the debug info. We
18930 could fix this by only using the demangled name to get the
18931 prefix (but see comment in read_structure_type). */
18933 struct partial_die_info
*real_pdi
;
18934 struct partial_die_info
*child_pdi
;
18936 /* If this DIE (this DIE's specification, if any) has a parent, then
18937 we should not do this. We'll prepend the parent's fully qualified
18938 name when we create the partial symbol. */
18940 real_pdi
= struct_pdi
;
18941 while (real_pdi
->has_specification
)
18943 auto res
= find_partial_die (real_pdi
->spec_offset
,
18944 real_pdi
->spec_is_dwz
, cu
);
18945 real_pdi
= res
.pdi
;
18949 if (real_pdi
->die_parent
!= NULL
)
18952 for (child_pdi
= struct_pdi
->die_child
;
18954 child_pdi
= child_pdi
->die_sibling
)
18956 if (child_pdi
->tag
== DW_TAG_subprogram
18957 && child_pdi
->linkage_name
!= NULL
)
18959 char *actual_class_name
18960 = language_class_name_from_physname (cu
->language_defn
,
18961 child_pdi
->linkage_name
);
18962 if (actual_class_name
!= NULL
)
18964 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18967 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18969 strlen (actual_class_name
)));
18970 xfree (actual_class_name
);
18978 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18980 /* Once we've fixed up a die, there's no point in doing so again.
18981 This also avoids a memory leak if we were to call
18982 guess_partial_die_structure_name multiple times. */
18986 /* If we found a reference attribute and the DIE has no name, try
18987 to find a name in the referred to DIE. */
18989 if (name
== NULL
&& has_specification
)
18991 struct partial_die_info
*spec_die
;
18993 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18994 spec_die
= res
.pdi
;
18997 spec_die
->fixup (cu
);
18999 if (spec_die
->name
)
19001 name
= spec_die
->name
;
19003 /* Copy DW_AT_external attribute if it is set. */
19004 if (spec_die
->is_external
)
19005 is_external
= spec_die
->is_external
;
19009 /* Set default names for some unnamed DIEs. */
19011 if (name
== NULL
&& tag
== DW_TAG_namespace
)
19012 name
= CP_ANONYMOUS_NAMESPACE_STR
;
19014 /* If there is no parent die to provide a namespace, and there are
19015 children, see if we can determine the namespace from their linkage
19017 if (cu
->language
== language_cplus
19018 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
19019 && die_parent
== NULL
19021 && (tag
== DW_TAG_class_type
19022 || tag
== DW_TAG_structure_type
19023 || tag
== DW_TAG_union_type
))
19024 guess_partial_die_structure_name (this, cu
);
19026 /* GCC might emit a nameless struct or union that has a linkage
19027 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19029 && (tag
== DW_TAG_class_type
19030 || tag
== DW_TAG_interface_type
19031 || tag
== DW_TAG_structure_type
19032 || tag
== DW_TAG_union_type
)
19033 && linkage_name
!= NULL
)
19037 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
19042 /* Strip any leading namespaces/classes, keep only the base name.
19043 DW_AT_name for named DIEs does not contain the prefixes. */
19044 base
= strrchr (demangled
, ':');
19045 if (base
&& base
> demangled
&& base
[-1] == ':')
19050 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19053 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
19054 base
, strlen (base
)));
19062 /* Read an attribute value described by an attribute form. */
19064 static const gdb_byte
*
19065 read_attribute_value (const struct die_reader_specs
*reader
,
19066 struct attribute
*attr
, unsigned form
,
19067 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
19069 struct dwarf2_cu
*cu
= reader
->cu
;
19070 struct dwarf2_per_objfile
*dwarf2_per_objfile
19071 = cu
->per_cu
->dwarf2_per_objfile
;
19072 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19073 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19074 bfd
*abfd
= reader
->abfd
;
19075 struct comp_unit_head
*cu_header
= &cu
->header
;
19076 unsigned int bytes_read
;
19077 struct dwarf_block
*blk
;
19079 attr
->form
= (enum dwarf_form
) form
;
19082 case DW_FORM_ref_addr
:
19083 if (cu
->header
.version
== 2)
19084 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
19086 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
19087 &cu
->header
, &bytes_read
);
19088 info_ptr
+= bytes_read
;
19090 case DW_FORM_GNU_ref_alt
:
19091 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19092 info_ptr
+= bytes_read
;
19095 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
19096 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
19097 info_ptr
+= bytes_read
;
19099 case DW_FORM_block2
:
19100 blk
= dwarf_alloc_block (cu
);
19101 blk
->size
= read_2_bytes (abfd
, info_ptr
);
19103 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19104 info_ptr
+= blk
->size
;
19105 DW_BLOCK (attr
) = blk
;
19107 case DW_FORM_block4
:
19108 blk
= dwarf_alloc_block (cu
);
19109 blk
->size
= read_4_bytes (abfd
, info_ptr
);
19111 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19112 info_ptr
+= blk
->size
;
19113 DW_BLOCK (attr
) = blk
;
19115 case DW_FORM_data2
:
19116 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
19119 case DW_FORM_data4
:
19120 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
19123 case DW_FORM_data8
:
19124 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
19127 case DW_FORM_data16
:
19128 blk
= dwarf_alloc_block (cu
);
19130 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19132 DW_BLOCK (attr
) = blk
;
19134 case DW_FORM_sec_offset
:
19135 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19136 info_ptr
+= bytes_read
;
19138 case DW_FORM_string
:
19139 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19140 DW_STRING_IS_CANONICAL (attr
) = 0;
19141 info_ptr
+= bytes_read
;
19144 if (!cu
->per_cu
->is_dwz
)
19146 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19147 abfd
, info_ptr
, cu_header
,
19149 DW_STRING_IS_CANONICAL (attr
) = 0;
19150 info_ptr
+= bytes_read
;
19154 case DW_FORM_line_strp
:
19155 if (!cu
->per_cu
->is_dwz
)
19157 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
19159 cu_header
, &bytes_read
);
19160 DW_STRING_IS_CANONICAL (attr
) = 0;
19161 info_ptr
+= bytes_read
;
19165 case DW_FORM_GNU_strp_alt
:
19167 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19168 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
19171 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
19173 DW_STRING_IS_CANONICAL (attr
) = 0;
19174 info_ptr
+= bytes_read
;
19177 case DW_FORM_exprloc
:
19178 case DW_FORM_block
:
19179 blk
= dwarf_alloc_block (cu
);
19180 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19181 info_ptr
+= bytes_read
;
19182 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19183 info_ptr
+= blk
->size
;
19184 DW_BLOCK (attr
) = blk
;
19186 case DW_FORM_block1
:
19187 blk
= dwarf_alloc_block (cu
);
19188 blk
->size
= read_1_byte (abfd
, info_ptr
);
19190 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19191 info_ptr
+= blk
->size
;
19192 DW_BLOCK (attr
) = blk
;
19194 case DW_FORM_data1
:
19195 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19199 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19202 case DW_FORM_flag_present
:
19203 DW_UNSND (attr
) = 1;
19205 case DW_FORM_sdata
:
19206 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19207 info_ptr
+= bytes_read
;
19209 case DW_FORM_udata
:
19210 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19211 info_ptr
+= bytes_read
;
19214 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19215 + read_1_byte (abfd
, info_ptr
));
19219 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19220 + read_2_bytes (abfd
, info_ptr
));
19224 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19225 + read_4_bytes (abfd
, info_ptr
));
19229 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19230 + read_8_bytes (abfd
, info_ptr
));
19233 case DW_FORM_ref_sig8
:
19234 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19237 case DW_FORM_ref_udata
:
19238 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19239 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19240 info_ptr
+= bytes_read
;
19242 case DW_FORM_indirect
:
19243 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19244 info_ptr
+= bytes_read
;
19245 if (form
== DW_FORM_implicit_const
)
19247 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19248 info_ptr
+= bytes_read
;
19250 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19253 case DW_FORM_implicit_const
:
19254 DW_SND (attr
) = implicit_const
;
19256 case DW_FORM_addrx
:
19257 case DW_FORM_GNU_addr_index
:
19258 if (reader
->dwo_file
== NULL
)
19260 /* For now flag a hard error.
19261 Later we can turn this into a complaint. */
19262 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19263 dwarf_form_name (form
),
19264 bfd_get_filename (abfd
));
19266 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19267 info_ptr
+= bytes_read
;
19270 case DW_FORM_strx1
:
19271 case DW_FORM_strx2
:
19272 case DW_FORM_strx3
:
19273 case DW_FORM_strx4
:
19274 case DW_FORM_GNU_str_index
:
19275 if (reader
->dwo_file
== NULL
)
19277 /* For now flag a hard error.
19278 Later we can turn this into a complaint if warranted. */
19279 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19280 dwarf_form_name (form
),
19281 bfd_get_filename (abfd
));
19284 ULONGEST str_index
;
19285 if (form
== DW_FORM_strx1
)
19287 str_index
= read_1_byte (abfd
, info_ptr
);
19290 else if (form
== DW_FORM_strx2
)
19292 str_index
= read_2_bytes (abfd
, info_ptr
);
19295 else if (form
== DW_FORM_strx3
)
19297 str_index
= read_3_bytes (abfd
, info_ptr
);
19300 else if (form
== DW_FORM_strx4
)
19302 str_index
= read_4_bytes (abfd
, info_ptr
);
19307 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19308 info_ptr
+= bytes_read
;
19310 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19311 DW_STRING_IS_CANONICAL (attr
) = 0;
19315 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19316 dwarf_form_name (form
),
19317 bfd_get_filename (abfd
));
19321 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19322 attr
->form
= DW_FORM_GNU_ref_alt
;
19324 /* We have seen instances where the compiler tried to emit a byte
19325 size attribute of -1 which ended up being encoded as an unsigned
19326 0xffffffff. Although 0xffffffff is technically a valid size value,
19327 an object of this size seems pretty unlikely so we can relatively
19328 safely treat these cases as if the size attribute was invalid and
19329 treat them as zero by default. */
19330 if (attr
->name
== DW_AT_byte_size
19331 && form
== DW_FORM_data4
19332 && DW_UNSND (attr
) >= 0xffffffff)
19335 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19336 hex_string (DW_UNSND (attr
)));
19337 DW_UNSND (attr
) = 0;
19343 /* Read an attribute described by an abbreviated attribute. */
19345 static const gdb_byte
*
19346 read_attribute (const struct die_reader_specs
*reader
,
19347 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19348 const gdb_byte
*info_ptr
)
19350 attr
->name
= abbrev
->name
;
19351 return read_attribute_value (reader
, attr
, abbrev
->form
,
19352 abbrev
->implicit_const
, info_ptr
);
19355 /* Read dwarf information from a buffer. */
19357 static unsigned int
19358 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19360 return bfd_get_8 (abfd
, buf
);
19364 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19366 return bfd_get_signed_8 (abfd
, buf
);
19369 static unsigned int
19370 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19372 return bfd_get_16 (abfd
, buf
);
19376 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19378 return bfd_get_signed_16 (abfd
, buf
);
19381 static unsigned int
19382 read_3_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19384 unsigned int result
= 0;
19385 for (int i
= 0; i
< 3; ++i
)
19387 unsigned char byte
= bfd_get_8 (abfd
, buf
);
19389 result
|= ((unsigned int) byte
<< (i
* 8));
19394 static unsigned int
19395 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19397 return bfd_get_32 (abfd
, buf
);
19401 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19403 return bfd_get_signed_32 (abfd
, buf
);
19407 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19409 return bfd_get_64 (abfd
, buf
);
19413 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19414 unsigned int *bytes_read
)
19416 struct comp_unit_head
*cu_header
= &cu
->header
;
19417 CORE_ADDR retval
= 0;
19419 if (cu_header
->signed_addr_p
)
19421 switch (cu_header
->addr_size
)
19424 retval
= bfd_get_signed_16 (abfd
, buf
);
19427 retval
= bfd_get_signed_32 (abfd
, buf
);
19430 retval
= bfd_get_signed_64 (abfd
, buf
);
19433 internal_error (__FILE__
, __LINE__
,
19434 _("read_address: bad switch, signed [in module %s]"),
19435 bfd_get_filename (abfd
));
19440 switch (cu_header
->addr_size
)
19443 retval
= bfd_get_16 (abfd
, buf
);
19446 retval
= bfd_get_32 (abfd
, buf
);
19449 retval
= bfd_get_64 (abfd
, buf
);
19452 internal_error (__FILE__
, __LINE__
,
19453 _("read_address: bad switch, "
19454 "unsigned [in module %s]"),
19455 bfd_get_filename (abfd
));
19459 *bytes_read
= cu_header
->addr_size
;
19463 /* Read the initial length from a section. The (draft) DWARF 3
19464 specification allows the initial length to take up either 4 bytes
19465 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19466 bytes describe the length and all offsets will be 8 bytes in length
19469 An older, non-standard 64-bit format is also handled by this
19470 function. The older format in question stores the initial length
19471 as an 8-byte quantity without an escape value. Lengths greater
19472 than 2^32 aren't very common which means that the initial 4 bytes
19473 is almost always zero. Since a length value of zero doesn't make
19474 sense for the 32-bit format, this initial zero can be considered to
19475 be an escape value which indicates the presence of the older 64-bit
19476 format. As written, the code can't detect (old format) lengths
19477 greater than 4GB. If it becomes necessary to handle lengths
19478 somewhat larger than 4GB, we could allow other small values (such
19479 as the non-sensical values of 1, 2, and 3) to also be used as
19480 escape values indicating the presence of the old format.
19482 The value returned via bytes_read should be used to increment the
19483 relevant pointer after calling read_initial_length().
19485 [ Note: read_initial_length() and read_offset() are based on the
19486 document entitled "DWARF Debugging Information Format", revision
19487 3, draft 8, dated November 19, 2001. This document was obtained
19490 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19492 This document is only a draft and is subject to change. (So beware.)
19494 Details regarding the older, non-standard 64-bit format were
19495 determined empirically by examining 64-bit ELF files produced by
19496 the SGI toolchain on an IRIX 6.5 machine.
19498 - Kevin, July 16, 2002
19502 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19504 LONGEST length
= bfd_get_32 (abfd
, buf
);
19506 if (length
== 0xffffffff)
19508 length
= bfd_get_64 (abfd
, buf
+ 4);
19511 else if (length
== 0)
19513 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19514 length
= bfd_get_64 (abfd
, buf
);
19525 /* Cover function for read_initial_length.
19526 Returns the length of the object at BUF, and stores the size of the
19527 initial length in *BYTES_READ and stores the size that offsets will be in
19529 If the initial length size is not equivalent to that specified in
19530 CU_HEADER then issue a complaint.
19531 This is useful when reading non-comp-unit headers. */
19534 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19535 const struct comp_unit_head
*cu_header
,
19536 unsigned int *bytes_read
,
19537 unsigned int *offset_size
)
19539 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19541 gdb_assert (cu_header
->initial_length_size
== 4
19542 || cu_header
->initial_length_size
== 8
19543 || cu_header
->initial_length_size
== 12);
19545 if (cu_header
->initial_length_size
!= *bytes_read
)
19546 complaint (_("intermixed 32-bit and 64-bit DWARF sections"));
19548 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19552 /* Read an offset from the data stream. The size of the offset is
19553 given by cu_header->offset_size. */
19556 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19557 const struct comp_unit_head
*cu_header
,
19558 unsigned int *bytes_read
)
19560 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19562 *bytes_read
= cu_header
->offset_size
;
19566 /* Read an offset from the data stream. */
19569 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19571 LONGEST retval
= 0;
19573 switch (offset_size
)
19576 retval
= bfd_get_32 (abfd
, buf
);
19579 retval
= bfd_get_64 (abfd
, buf
);
19582 internal_error (__FILE__
, __LINE__
,
19583 _("read_offset_1: bad switch [in module %s]"),
19584 bfd_get_filename (abfd
));
19590 static const gdb_byte
*
19591 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19593 /* If the size of a host char is 8 bits, we can return a pointer
19594 to the buffer, otherwise we have to copy the data to a buffer
19595 allocated on the temporary obstack. */
19596 gdb_assert (HOST_CHAR_BIT
== 8);
19600 static const char *
19601 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19602 unsigned int *bytes_read_ptr
)
19604 /* If the size of a host char is 8 bits, we can return a pointer
19605 to the string, otherwise we have to copy the string to a buffer
19606 allocated on the temporary obstack. */
19607 gdb_assert (HOST_CHAR_BIT
== 8);
19610 *bytes_read_ptr
= 1;
19613 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19614 return (const char *) buf
;
19617 /* Return pointer to string at section SECT offset STR_OFFSET with error
19618 reporting strings FORM_NAME and SECT_NAME. */
19620 static const char *
19621 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19622 bfd
*abfd
, LONGEST str_offset
,
19623 struct dwarf2_section_info
*sect
,
19624 const char *form_name
,
19625 const char *sect_name
)
19627 dwarf2_read_section (objfile
, sect
);
19628 if (sect
->buffer
== NULL
)
19629 error (_("%s used without %s section [in module %s]"),
19630 form_name
, sect_name
, bfd_get_filename (abfd
));
19631 if (str_offset
>= sect
->size
)
19632 error (_("%s pointing outside of %s section [in module %s]"),
19633 form_name
, sect_name
, bfd_get_filename (abfd
));
19634 gdb_assert (HOST_CHAR_BIT
== 8);
19635 if (sect
->buffer
[str_offset
] == '\0')
19637 return (const char *) (sect
->buffer
+ str_offset
);
19640 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19642 static const char *
19643 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19644 bfd
*abfd
, LONGEST str_offset
)
19646 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19648 &dwarf2_per_objfile
->str
,
19649 "DW_FORM_strp", ".debug_str");
19652 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19654 static const char *
19655 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19656 bfd
*abfd
, LONGEST str_offset
)
19658 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19660 &dwarf2_per_objfile
->line_str
,
19661 "DW_FORM_line_strp",
19662 ".debug_line_str");
19665 /* Read a string at offset STR_OFFSET in the .debug_str section from
19666 the .dwz file DWZ. Throw an error if the offset is too large. If
19667 the string consists of a single NUL byte, return NULL; otherwise
19668 return a pointer to the string. */
19670 static const char *
19671 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19672 LONGEST str_offset
)
19674 dwarf2_read_section (objfile
, &dwz
->str
);
19676 if (dwz
->str
.buffer
== NULL
)
19677 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19678 "section [in module %s]"),
19679 bfd_get_filename (dwz
->dwz_bfd
));
19680 if (str_offset
>= dwz
->str
.size
)
19681 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19682 ".debug_str section [in module %s]"),
19683 bfd_get_filename (dwz
->dwz_bfd
));
19684 gdb_assert (HOST_CHAR_BIT
== 8);
19685 if (dwz
->str
.buffer
[str_offset
] == '\0')
19687 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19690 /* Return pointer to string at .debug_str offset as read from BUF.
19691 BUF is assumed to be in a compilation unit described by CU_HEADER.
19692 Return *BYTES_READ_PTR count of bytes read from BUF. */
19694 static const char *
19695 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19696 const gdb_byte
*buf
,
19697 const struct comp_unit_head
*cu_header
,
19698 unsigned int *bytes_read_ptr
)
19700 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19702 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19705 /* Return pointer to string at .debug_line_str offset as read from BUF.
19706 BUF is assumed to be in a compilation unit described by CU_HEADER.
19707 Return *BYTES_READ_PTR count of bytes read from BUF. */
19709 static const char *
19710 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19711 bfd
*abfd
, const gdb_byte
*buf
,
19712 const struct comp_unit_head
*cu_header
,
19713 unsigned int *bytes_read_ptr
)
19715 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19717 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19722 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19723 unsigned int *bytes_read_ptr
)
19726 unsigned int num_read
;
19728 unsigned char byte
;
19735 byte
= bfd_get_8 (abfd
, buf
);
19738 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19739 if ((byte
& 128) == 0)
19745 *bytes_read_ptr
= num_read
;
19750 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19751 unsigned int *bytes_read_ptr
)
19754 int shift
, num_read
;
19755 unsigned char byte
;
19762 byte
= bfd_get_8 (abfd
, buf
);
19765 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19767 if ((byte
& 128) == 0)
19772 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19773 result
|= -(((ULONGEST
) 1) << shift
);
19774 *bytes_read_ptr
= num_read
;
19778 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19779 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19780 ADDR_SIZE is the size of addresses from the CU header. */
19783 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19784 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19786 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19787 bfd
*abfd
= objfile
->obfd
;
19788 const gdb_byte
*info_ptr
;
19790 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19791 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19792 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19793 objfile_name (objfile
));
19794 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19795 error (_("DW_FORM_addr_index pointing outside of "
19796 ".debug_addr section [in module %s]"),
19797 objfile_name (objfile
));
19798 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19799 + addr_base
+ addr_index
* addr_size
);
19800 if (addr_size
== 4)
19801 return bfd_get_32 (abfd
, info_ptr
);
19803 return bfd_get_64 (abfd
, info_ptr
);
19806 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19809 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19811 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19812 cu
->addr_base
, cu
->header
.addr_size
);
19815 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19818 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19819 unsigned int *bytes_read
)
19821 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19822 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19824 return read_addr_index (cu
, addr_index
);
19827 /* Data structure to pass results from dwarf2_read_addr_index_reader
19828 back to dwarf2_read_addr_index. */
19830 struct dwarf2_read_addr_index_data
19832 ULONGEST addr_base
;
19836 /* die_reader_func for dwarf2_read_addr_index. */
19839 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19840 const gdb_byte
*info_ptr
,
19841 struct die_info
*comp_unit_die
,
19845 struct dwarf2_cu
*cu
= reader
->cu
;
19846 struct dwarf2_read_addr_index_data
*aidata
=
19847 (struct dwarf2_read_addr_index_data
*) data
;
19849 aidata
->addr_base
= cu
->addr_base
;
19850 aidata
->addr_size
= cu
->header
.addr_size
;
19853 /* Given an index in .debug_addr, fetch the value.
19854 NOTE: This can be called during dwarf expression evaluation,
19855 long after the debug information has been read, and thus per_cu->cu
19856 may no longer exist. */
19859 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19860 unsigned int addr_index
)
19862 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19863 struct dwarf2_cu
*cu
= per_cu
->cu
;
19864 ULONGEST addr_base
;
19867 /* We need addr_base and addr_size.
19868 If we don't have PER_CU->cu, we have to get it.
19869 Nasty, but the alternative is storing the needed info in PER_CU,
19870 which at this point doesn't seem justified: it's not clear how frequently
19871 it would get used and it would increase the size of every PER_CU.
19872 Entry points like dwarf2_per_cu_addr_size do a similar thing
19873 so we're not in uncharted territory here.
19874 Alas we need to be a bit more complicated as addr_base is contained
19877 We don't need to read the entire CU(/TU).
19878 We just need the header and top level die.
19880 IWBN to use the aging mechanism to let us lazily later discard the CU.
19881 For now we skip this optimization. */
19885 addr_base
= cu
->addr_base
;
19886 addr_size
= cu
->header
.addr_size
;
19890 struct dwarf2_read_addr_index_data aidata
;
19892 /* Note: We can't use init_cutu_and_read_dies_simple here,
19893 we need addr_base. */
19894 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0, false,
19895 dwarf2_read_addr_index_reader
, &aidata
);
19896 addr_base
= aidata
.addr_base
;
19897 addr_size
= aidata
.addr_size
;
19900 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19904 /* Given a DW_FORM_GNU_str_index or DW_FORM_strx, fetch the string.
19905 This is only used by the Fission support. */
19907 static const char *
19908 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19910 struct dwarf2_cu
*cu
= reader
->cu
;
19911 struct dwarf2_per_objfile
*dwarf2_per_objfile
19912 = cu
->per_cu
->dwarf2_per_objfile
;
19913 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19914 const char *objf_name
= objfile_name (objfile
);
19915 bfd
*abfd
= objfile
->obfd
;
19916 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19917 struct dwarf2_section_info
*str_offsets_section
=
19918 &reader
->dwo_file
->sections
.str_offsets
;
19919 const gdb_byte
*info_ptr
;
19920 ULONGEST str_offset
;
19921 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19923 dwarf2_read_section (objfile
, str_section
);
19924 dwarf2_read_section (objfile
, str_offsets_section
);
19925 if (str_section
->buffer
== NULL
)
19926 error (_("%s used without .debug_str.dwo section"
19927 " in CU at offset %s [in module %s]"),
19928 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19929 if (str_offsets_section
->buffer
== NULL
)
19930 error (_("%s used without .debug_str_offsets.dwo section"
19931 " in CU at offset %s [in module %s]"),
19932 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19933 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
19934 error (_("%s pointing outside of .debug_str_offsets.dwo"
19935 " section in CU at offset %s [in module %s]"),
19936 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19937 info_ptr
= (str_offsets_section
->buffer
19938 + str_index
* cu
->header
.offset_size
);
19939 if (cu
->header
.offset_size
== 4)
19940 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19942 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19943 if (str_offset
>= str_section
->size
)
19944 error (_("Offset from %s pointing outside of"
19945 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19946 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19947 return (const char *) (str_section
->buffer
+ str_offset
);
19950 /* Return the length of an LEB128 number in BUF. */
19953 leb128_size (const gdb_byte
*buf
)
19955 const gdb_byte
*begin
= buf
;
19961 if ((byte
& 128) == 0)
19962 return buf
- begin
;
19967 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19976 cu
->language
= language_c
;
19979 case DW_LANG_C_plus_plus
:
19980 case DW_LANG_C_plus_plus_11
:
19981 case DW_LANG_C_plus_plus_14
:
19982 cu
->language
= language_cplus
;
19985 cu
->language
= language_d
;
19987 case DW_LANG_Fortran77
:
19988 case DW_LANG_Fortran90
:
19989 case DW_LANG_Fortran95
:
19990 case DW_LANG_Fortran03
:
19991 case DW_LANG_Fortran08
:
19992 cu
->language
= language_fortran
;
19995 cu
->language
= language_go
;
19997 case DW_LANG_Mips_Assembler
:
19998 cu
->language
= language_asm
;
20000 case DW_LANG_Ada83
:
20001 case DW_LANG_Ada95
:
20002 cu
->language
= language_ada
;
20004 case DW_LANG_Modula2
:
20005 cu
->language
= language_m2
;
20007 case DW_LANG_Pascal83
:
20008 cu
->language
= language_pascal
;
20011 cu
->language
= language_objc
;
20014 case DW_LANG_Rust_old
:
20015 cu
->language
= language_rust
;
20017 case DW_LANG_Cobol74
:
20018 case DW_LANG_Cobol85
:
20020 cu
->language
= language_minimal
;
20023 cu
->language_defn
= language_def (cu
->language
);
20026 /* Return the named attribute or NULL if not there. */
20028 static struct attribute
*
20029 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20034 struct attribute
*spec
= NULL
;
20036 for (i
= 0; i
< die
->num_attrs
; ++i
)
20038 if (die
->attrs
[i
].name
== name
)
20039 return &die
->attrs
[i
];
20040 if (die
->attrs
[i
].name
== DW_AT_specification
20041 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
20042 spec
= &die
->attrs
[i
];
20048 die
= follow_die_ref (die
, spec
, &cu
);
20054 /* Return the named attribute or NULL if not there,
20055 but do not follow DW_AT_specification, etc.
20056 This is for use in contexts where we're reading .debug_types dies.
20057 Following DW_AT_specification, DW_AT_abstract_origin will take us
20058 back up the chain, and we want to go down. */
20060 static struct attribute
*
20061 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
20065 for (i
= 0; i
< die
->num_attrs
; ++i
)
20066 if (die
->attrs
[i
].name
== name
)
20067 return &die
->attrs
[i
];
20072 /* Return the string associated with a string-typed attribute, or NULL if it
20073 is either not found or is of an incorrect type. */
20075 static const char *
20076 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20078 struct attribute
*attr
;
20079 const char *str
= NULL
;
20081 attr
= dwarf2_attr (die
, name
, cu
);
20085 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
20086 || attr
->form
== DW_FORM_string
20087 || attr
->form
== DW_FORM_strx
20088 || attr
->form
== DW_FORM_GNU_str_index
20089 || attr
->form
== DW_FORM_GNU_strp_alt
)
20090 str
= DW_STRING (attr
);
20092 complaint (_("string type expected for attribute %s for "
20093 "DIE at %s in module %s"),
20094 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
20095 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
20101 /* Return non-zero iff the attribute NAME is defined for the given DIE,
20102 and holds a non-zero value. This function should only be used for
20103 DW_FORM_flag or DW_FORM_flag_present attributes. */
20106 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
20108 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
20110 return (attr
&& DW_UNSND (attr
));
20114 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
20116 /* A DIE is a declaration if it has a DW_AT_declaration attribute
20117 which value is non-zero. However, we have to be careful with
20118 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
20119 (via dwarf2_flag_true_p) follows this attribute. So we may
20120 end up accidently finding a declaration attribute that belongs
20121 to a different DIE referenced by the specification attribute,
20122 even though the given DIE does not have a declaration attribute. */
20123 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
20124 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
20127 /* Return the die giving the specification for DIE, if there is
20128 one. *SPEC_CU is the CU containing DIE on input, and the CU
20129 containing the return value on output. If there is no
20130 specification, but there is an abstract origin, that is
20133 static struct die_info
*
20134 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
20136 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
20139 if (spec_attr
== NULL
)
20140 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
20142 if (spec_attr
== NULL
)
20145 return follow_die_ref (die
, spec_attr
, spec_cu
);
20148 /* Stub for free_line_header to match void * callback types. */
20151 free_line_header_voidp (void *arg
)
20153 struct line_header
*lh
= (struct line_header
*) arg
;
20159 line_header::add_include_dir (const char *include_dir
)
20161 if (dwarf_line_debug
>= 2)
20162 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
20163 include_dirs
.size () + 1, include_dir
);
20165 include_dirs
.push_back (include_dir
);
20169 line_header::add_file_name (const char *name
,
20171 unsigned int mod_time
,
20172 unsigned int length
)
20174 if (dwarf_line_debug
>= 2)
20175 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
20176 (unsigned) file_names
.size () + 1, name
);
20178 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
20181 /* A convenience function to find the proper .debug_line section for a CU. */
20183 static struct dwarf2_section_info
*
20184 get_debug_line_section (struct dwarf2_cu
*cu
)
20186 struct dwarf2_section_info
*section
;
20187 struct dwarf2_per_objfile
*dwarf2_per_objfile
20188 = cu
->per_cu
->dwarf2_per_objfile
;
20190 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
20192 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20193 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
20194 else if (cu
->per_cu
->is_dwz
)
20196 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
20198 section
= &dwz
->line
;
20201 section
= &dwarf2_per_objfile
->line
;
20206 /* Read directory or file name entry format, starting with byte of
20207 format count entries, ULEB128 pairs of entry formats, ULEB128 of
20208 entries count and the entries themselves in the described entry
20212 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
20213 bfd
*abfd
, const gdb_byte
**bufp
,
20214 struct line_header
*lh
,
20215 const struct comp_unit_head
*cu_header
,
20216 void (*callback
) (struct line_header
*lh
,
20219 unsigned int mod_time
,
20220 unsigned int length
))
20222 gdb_byte format_count
, formati
;
20223 ULONGEST data_count
, datai
;
20224 const gdb_byte
*buf
= *bufp
;
20225 const gdb_byte
*format_header_data
;
20226 unsigned int bytes_read
;
20228 format_count
= read_1_byte (abfd
, buf
);
20230 format_header_data
= buf
;
20231 for (formati
= 0; formati
< format_count
; formati
++)
20233 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20235 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20239 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20241 for (datai
= 0; datai
< data_count
; datai
++)
20243 const gdb_byte
*format
= format_header_data
;
20244 struct file_entry fe
;
20246 for (formati
= 0; formati
< format_count
; formati
++)
20248 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20249 format
+= bytes_read
;
20251 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20252 format
+= bytes_read
;
20254 gdb::optional
<const char *> string
;
20255 gdb::optional
<unsigned int> uint
;
20259 case DW_FORM_string
:
20260 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
20264 case DW_FORM_line_strp
:
20265 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
20272 case DW_FORM_data1
:
20273 uint
.emplace (read_1_byte (abfd
, buf
));
20277 case DW_FORM_data2
:
20278 uint
.emplace (read_2_bytes (abfd
, buf
));
20282 case DW_FORM_data4
:
20283 uint
.emplace (read_4_bytes (abfd
, buf
));
20287 case DW_FORM_data8
:
20288 uint
.emplace (read_8_bytes (abfd
, buf
));
20292 case DW_FORM_udata
:
20293 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20297 case DW_FORM_block
:
20298 /* It is valid only for DW_LNCT_timestamp which is ignored by
20303 switch (content_type
)
20306 if (string
.has_value ())
20309 case DW_LNCT_directory_index
:
20310 if (uint
.has_value ())
20311 fe
.d_index
= (dir_index
) *uint
;
20313 case DW_LNCT_timestamp
:
20314 if (uint
.has_value ())
20315 fe
.mod_time
= *uint
;
20318 if (uint
.has_value ())
20324 complaint (_("Unknown format content type %s"),
20325 pulongest (content_type
));
20329 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20335 /* Read the statement program header starting at OFFSET in
20336 .debug_line, or .debug_line.dwo. Return a pointer
20337 to a struct line_header, allocated using xmalloc.
20338 Returns NULL if there is a problem reading the header, e.g., if it
20339 has a version we don't understand.
20341 NOTE: the strings in the include directory and file name tables of
20342 the returned object point into the dwarf line section buffer,
20343 and must not be freed. */
20345 static line_header_up
20346 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20348 const gdb_byte
*line_ptr
;
20349 unsigned int bytes_read
, offset_size
;
20351 const char *cur_dir
, *cur_file
;
20352 struct dwarf2_section_info
*section
;
20354 struct dwarf2_per_objfile
*dwarf2_per_objfile
20355 = cu
->per_cu
->dwarf2_per_objfile
;
20357 section
= get_debug_line_section (cu
);
20358 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20359 if (section
->buffer
== NULL
)
20361 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20362 complaint (_("missing .debug_line.dwo section"));
20364 complaint (_("missing .debug_line section"));
20368 /* We can't do this until we know the section is non-empty.
20369 Only then do we know we have such a section. */
20370 abfd
= get_section_bfd_owner (section
);
20372 /* Make sure that at least there's room for the total_length field.
20373 That could be 12 bytes long, but we're just going to fudge that. */
20374 if (to_underlying (sect_off
) + 4 >= section
->size
)
20376 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20380 line_header_up
lh (new line_header ());
20382 lh
->sect_off
= sect_off
;
20383 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20385 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20387 /* Read in the header. */
20389 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20390 &bytes_read
, &offset_size
);
20391 line_ptr
+= bytes_read
;
20392 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20394 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20397 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20398 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20400 if (lh
->version
> 5)
20402 /* This is a version we don't understand. The format could have
20403 changed in ways we don't handle properly so just punt. */
20404 complaint (_("unsupported version in .debug_line section"));
20407 if (lh
->version
>= 5)
20409 gdb_byte segment_selector_size
;
20411 /* Skip address size. */
20412 read_1_byte (abfd
, line_ptr
);
20415 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20417 if (segment_selector_size
!= 0)
20419 complaint (_("unsupported segment selector size %u "
20420 "in .debug_line section"),
20421 segment_selector_size
);
20425 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20426 line_ptr
+= offset_size
;
20427 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20429 if (lh
->version
>= 4)
20431 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20435 lh
->maximum_ops_per_instruction
= 1;
20437 if (lh
->maximum_ops_per_instruction
== 0)
20439 lh
->maximum_ops_per_instruction
= 1;
20440 complaint (_("invalid maximum_ops_per_instruction "
20441 "in `.debug_line' section"));
20444 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20446 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20448 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20450 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20452 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20454 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20455 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20457 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20461 if (lh
->version
>= 5)
20463 /* Read directory table. */
20464 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20466 [] (struct line_header
*header
, const char *name
,
20467 dir_index d_index
, unsigned int mod_time
,
20468 unsigned int length
)
20470 header
->add_include_dir (name
);
20473 /* Read file name table. */
20474 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20476 [] (struct line_header
*header
, const char *name
,
20477 dir_index d_index
, unsigned int mod_time
,
20478 unsigned int length
)
20480 header
->add_file_name (name
, d_index
, mod_time
, length
);
20485 /* Read directory table. */
20486 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20488 line_ptr
+= bytes_read
;
20489 lh
->add_include_dir (cur_dir
);
20491 line_ptr
+= bytes_read
;
20493 /* Read file name table. */
20494 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20496 unsigned int mod_time
, length
;
20499 line_ptr
+= bytes_read
;
20500 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20501 line_ptr
+= bytes_read
;
20502 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20503 line_ptr
+= bytes_read
;
20504 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20505 line_ptr
+= bytes_read
;
20507 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20509 line_ptr
+= bytes_read
;
20511 lh
->statement_program_start
= line_ptr
;
20513 if (line_ptr
> (section
->buffer
+ section
->size
))
20514 complaint (_("line number info header doesn't "
20515 "fit in `.debug_line' section"));
20520 /* Subroutine of dwarf_decode_lines to simplify it.
20521 Return the file name of the psymtab for included file FILE_INDEX
20522 in line header LH of PST.
20523 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20524 If space for the result is malloc'd, *NAME_HOLDER will be set.
20525 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20527 static const char *
20528 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20529 const struct partial_symtab
*pst
,
20530 const char *comp_dir
,
20531 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20533 const file_entry
&fe
= lh
->file_names
[file_index
];
20534 const char *include_name
= fe
.name
;
20535 const char *include_name_to_compare
= include_name
;
20536 const char *pst_filename
;
20539 const char *dir_name
= fe
.include_dir (lh
);
20541 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20542 if (!IS_ABSOLUTE_PATH (include_name
)
20543 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20545 /* Avoid creating a duplicate psymtab for PST.
20546 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20547 Before we do the comparison, however, we need to account
20548 for DIR_NAME and COMP_DIR.
20549 First prepend dir_name (if non-NULL). If we still don't
20550 have an absolute path prepend comp_dir (if non-NULL).
20551 However, the directory we record in the include-file's
20552 psymtab does not contain COMP_DIR (to match the
20553 corresponding symtab(s)).
20558 bash$ gcc -g ./hello.c
20559 include_name = "hello.c"
20561 DW_AT_comp_dir = comp_dir = "/tmp"
20562 DW_AT_name = "./hello.c"
20566 if (dir_name
!= NULL
)
20568 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20569 include_name
, (char *) NULL
));
20570 include_name
= name_holder
->get ();
20571 include_name_to_compare
= include_name
;
20573 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20575 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20576 include_name
, (char *) NULL
));
20577 include_name_to_compare
= hold_compare
.get ();
20581 pst_filename
= pst
->filename
;
20582 gdb::unique_xmalloc_ptr
<char> copied_name
;
20583 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20585 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20586 pst_filename
, (char *) NULL
));
20587 pst_filename
= copied_name
.get ();
20590 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20594 return include_name
;
20597 /* State machine to track the state of the line number program. */
20599 class lnp_state_machine
20602 /* Initialize a machine state for the start of a line number
20604 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
20605 bool record_lines_p
);
20607 file_entry
*current_file ()
20609 /* lh->file_names is 0-based, but the file name numbers in the
20610 statement program are 1-based. */
20611 return m_line_header
->file_name_at (m_file
);
20614 /* Record the line in the state machine. END_SEQUENCE is true if
20615 we're processing the end of a sequence. */
20616 void record_line (bool end_sequence
);
20618 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
20619 nop-out rest of the lines in this sequence. */
20620 void check_line_address (struct dwarf2_cu
*cu
,
20621 const gdb_byte
*line_ptr
,
20622 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
20624 void handle_set_discriminator (unsigned int discriminator
)
20626 m_discriminator
= discriminator
;
20627 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20630 /* Handle DW_LNE_set_address. */
20631 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20634 address
+= baseaddr
;
20635 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20638 /* Handle DW_LNS_advance_pc. */
20639 void handle_advance_pc (CORE_ADDR adjust
);
20641 /* Handle a special opcode. */
20642 void handle_special_opcode (unsigned char op_code
);
20644 /* Handle DW_LNS_advance_line. */
20645 void handle_advance_line (int line_delta
)
20647 advance_line (line_delta
);
20650 /* Handle DW_LNS_set_file. */
20651 void handle_set_file (file_name_index file
);
20653 /* Handle DW_LNS_negate_stmt. */
20654 void handle_negate_stmt ()
20656 m_is_stmt
= !m_is_stmt
;
20659 /* Handle DW_LNS_const_add_pc. */
20660 void handle_const_add_pc ();
20662 /* Handle DW_LNS_fixed_advance_pc. */
20663 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20665 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20669 /* Handle DW_LNS_copy. */
20670 void handle_copy ()
20672 record_line (false);
20673 m_discriminator
= 0;
20676 /* Handle DW_LNE_end_sequence. */
20677 void handle_end_sequence ()
20679 m_currently_recording_lines
= true;
20683 /* Advance the line by LINE_DELTA. */
20684 void advance_line (int line_delta
)
20686 m_line
+= line_delta
;
20688 if (line_delta
!= 0)
20689 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20692 struct dwarf2_cu
*m_cu
;
20694 gdbarch
*m_gdbarch
;
20696 /* True if we're recording lines.
20697 Otherwise we're building partial symtabs and are just interested in
20698 finding include files mentioned by the line number program. */
20699 bool m_record_lines_p
;
20701 /* The line number header. */
20702 line_header
*m_line_header
;
20704 /* These are part of the standard DWARF line number state machine,
20705 and initialized according to the DWARF spec. */
20707 unsigned char m_op_index
= 0;
20708 /* The line table index (1-based) of the current file. */
20709 file_name_index m_file
= (file_name_index
) 1;
20710 unsigned int m_line
= 1;
20712 /* These are initialized in the constructor. */
20714 CORE_ADDR m_address
;
20716 unsigned int m_discriminator
;
20718 /* Additional bits of state we need to track. */
20720 /* The last file that we called dwarf2_start_subfile for.
20721 This is only used for TLLs. */
20722 unsigned int m_last_file
= 0;
20723 /* The last file a line number was recorded for. */
20724 struct subfile
*m_last_subfile
= NULL
;
20726 /* When true, record the lines we decode. */
20727 bool m_currently_recording_lines
= false;
20729 /* The last line number that was recorded, used to coalesce
20730 consecutive entries for the same line. This can happen, for
20731 example, when discriminators are present. PR 17276. */
20732 unsigned int m_last_line
= 0;
20733 bool m_line_has_non_zero_discriminator
= false;
20737 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20739 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20740 / m_line_header
->maximum_ops_per_instruction
)
20741 * m_line_header
->minimum_instruction_length
);
20742 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20743 m_op_index
= ((m_op_index
+ adjust
)
20744 % m_line_header
->maximum_ops_per_instruction
);
20748 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20750 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20751 CORE_ADDR addr_adj
= (((m_op_index
20752 + (adj_opcode
/ m_line_header
->line_range
))
20753 / m_line_header
->maximum_ops_per_instruction
)
20754 * m_line_header
->minimum_instruction_length
);
20755 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20756 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20757 % m_line_header
->maximum_ops_per_instruction
);
20759 int line_delta
= (m_line_header
->line_base
20760 + (adj_opcode
% m_line_header
->line_range
));
20761 advance_line (line_delta
);
20762 record_line (false);
20763 m_discriminator
= 0;
20767 lnp_state_machine::handle_set_file (file_name_index file
)
20771 const file_entry
*fe
= current_file ();
20773 dwarf2_debug_line_missing_file_complaint ();
20774 else if (m_record_lines_p
)
20776 const char *dir
= fe
->include_dir (m_line_header
);
20778 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20779 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20780 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
20785 lnp_state_machine::handle_const_add_pc ()
20788 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20791 = (((m_op_index
+ adjust
)
20792 / m_line_header
->maximum_ops_per_instruction
)
20793 * m_line_header
->minimum_instruction_length
);
20795 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20796 m_op_index
= ((m_op_index
+ adjust
)
20797 % m_line_header
->maximum_ops_per_instruction
);
20800 /* Return non-zero if we should add LINE to the line number table.
20801 LINE is the line to add, LAST_LINE is the last line that was added,
20802 LAST_SUBFILE is the subfile for LAST_LINE.
20803 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20804 had a non-zero discriminator.
20806 We have to be careful in the presence of discriminators.
20807 E.g., for this line:
20809 for (i = 0; i < 100000; i++);
20811 clang can emit four line number entries for that one line,
20812 each with a different discriminator.
20813 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20815 However, we want gdb to coalesce all four entries into one.
20816 Otherwise the user could stepi into the middle of the line and
20817 gdb would get confused about whether the pc really was in the
20818 middle of the line.
20820 Things are further complicated by the fact that two consecutive
20821 line number entries for the same line is a heuristic used by gcc
20822 to denote the end of the prologue. So we can't just discard duplicate
20823 entries, we have to be selective about it. The heuristic we use is
20824 that we only collapse consecutive entries for the same line if at least
20825 one of those entries has a non-zero discriminator. PR 17276.
20827 Note: Addresses in the line number state machine can never go backwards
20828 within one sequence, thus this coalescing is ok. */
20831 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20832 unsigned int line
, unsigned int last_line
,
20833 int line_has_non_zero_discriminator
,
20834 struct subfile
*last_subfile
)
20836 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20838 if (line
!= last_line
)
20840 /* Same line for the same file that we've seen already.
20841 As a last check, for pr 17276, only record the line if the line
20842 has never had a non-zero discriminator. */
20843 if (!line_has_non_zero_discriminator
)
20848 /* Use the CU's builder to record line number LINE beginning at
20849 address ADDRESS in the line table of subfile SUBFILE. */
20852 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20853 unsigned int line
, CORE_ADDR address
,
20854 struct dwarf2_cu
*cu
)
20856 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20858 if (dwarf_line_debug
)
20860 fprintf_unfiltered (gdb_stdlog
,
20861 "Recording line %u, file %s, address %s\n",
20862 line
, lbasename (subfile
->name
),
20863 paddress (gdbarch
, address
));
20867 cu
->get_builder ()->record_line (subfile
, line
, addr
);
20870 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20871 Mark the end of a set of line number records.
20872 The arguments are the same as for dwarf_record_line_1.
20873 If SUBFILE is NULL the request is ignored. */
20876 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20877 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20879 if (subfile
== NULL
)
20882 if (dwarf_line_debug
)
20884 fprintf_unfiltered (gdb_stdlog
,
20885 "Finishing current line, file %s, address %s\n",
20886 lbasename (subfile
->name
),
20887 paddress (gdbarch
, address
));
20890 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, cu
);
20894 lnp_state_machine::record_line (bool end_sequence
)
20896 if (dwarf_line_debug
)
20898 fprintf_unfiltered (gdb_stdlog
,
20899 "Processing actual line %u: file %u,"
20900 " address %s, is_stmt %u, discrim %u\n",
20901 m_line
, to_underlying (m_file
),
20902 paddress (m_gdbarch
, m_address
),
20903 m_is_stmt
, m_discriminator
);
20906 file_entry
*fe
= current_file ();
20909 dwarf2_debug_line_missing_file_complaint ();
20910 /* For now we ignore lines not starting on an instruction boundary.
20911 But not when processing end_sequence for compatibility with the
20912 previous version of the code. */
20913 else if (m_op_index
== 0 || end_sequence
)
20915 fe
->included_p
= 1;
20916 if (m_record_lines_p
&& (producer_is_codewarrior (m_cu
) || m_is_stmt
))
20918 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20921 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20922 m_currently_recording_lines
? m_cu
: nullptr);
20927 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20928 m_line_has_non_zero_discriminator
,
20931 buildsym_compunit
*builder
= m_cu
->get_builder ();
20932 dwarf_record_line_1 (m_gdbarch
,
20933 builder
->get_current_subfile (),
20935 m_currently_recording_lines
? m_cu
: nullptr);
20937 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20938 m_last_line
= m_line
;
20944 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20945 line_header
*lh
, bool record_lines_p
)
20949 m_record_lines_p
= record_lines_p
;
20950 m_line_header
= lh
;
20952 m_currently_recording_lines
= true;
20954 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20955 was a line entry for it so that the backend has a chance to adjust it
20956 and also record it in case it needs it. This is currently used by MIPS
20957 code, cf. `mips_adjust_dwarf2_line'. */
20958 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20959 m_is_stmt
= lh
->default_is_stmt
;
20960 m_discriminator
= 0;
20964 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20965 const gdb_byte
*line_ptr
,
20966 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20968 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20969 the pc range of the CU. However, we restrict the test to only ADDRESS
20970 values of zero to preserve GDB's previous behaviour which is to handle
20971 the specific case of a function being GC'd by the linker. */
20973 if (address
== 0 && address
< unrelocated_lowpc
)
20975 /* This line table is for a function which has been
20976 GCd by the linker. Ignore it. PR gdb/12528 */
20978 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20979 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20981 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20982 line_offset
, objfile_name (objfile
));
20983 m_currently_recording_lines
= false;
20984 /* Note: m_currently_recording_lines is left as false until we see
20985 DW_LNE_end_sequence. */
20989 /* Subroutine of dwarf_decode_lines to simplify it.
20990 Process the line number information in LH.
20991 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20992 program in order to set included_p for every referenced header. */
20995 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20996 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20998 const gdb_byte
*line_ptr
, *extended_end
;
20999 const gdb_byte
*line_end
;
21000 unsigned int bytes_read
, extended_len
;
21001 unsigned char op_code
, extended_op
;
21002 CORE_ADDR baseaddr
;
21003 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21004 bfd
*abfd
= objfile
->obfd
;
21005 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21006 /* True if we're recording line info (as opposed to building partial
21007 symtabs and just interested in finding include files mentioned by
21008 the line number program). */
21009 bool record_lines_p
= !decode_for_pst_p
;
21011 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21013 line_ptr
= lh
->statement_program_start
;
21014 line_end
= lh
->statement_program_end
;
21016 /* Read the statement sequences until there's nothing left. */
21017 while (line_ptr
< line_end
)
21019 /* The DWARF line number program state machine. Reset the state
21020 machine at the start of each sequence. */
21021 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
21022 bool end_sequence
= false;
21024 if (record_lines_p
)
21026 /* Start a subfile for the current file of the state
21028 const file_entry
*fe
= state_machine
.current_file ();
21031 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
21034 /* Decode the table. */
21035 while (line_ptr
< line_end
&& !end_sequence
)
21037 op_code
= read_1_byte (abfd
, line_ptr
);
21040 if (op_code
>= lh
->opcode_base
)
21042 /* Special opcode. */
21043 state_machine
.handle_special_opcode (op_code
);
21045 else switch (op_code
)
21047 case DW_LNS_extended_op
:
21048 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
21050 line_ptr
+= bytes_read
;
21051 extended_end
= line_ptr
+ extended_len
;
21052 extended_op
= read_1_byte (abfd
, line_ptr
);
21054 switch (extended_op
)
21056 case DW_LNE_end_sequence
:
21057 state_machine
.handle_end_sequence ();
21058 end_sequence
= true;
21060 case DW_LNE_set_address
:
21063 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
21064 line_ptr
+= bytes_read
;
21066 state_machine
.check_line_address (cu
, line_ptr
,
21067 lowpc
- baseaddr
, address
);
21068 state_machine
.handle_set_address (baseaddr
, address
);
21071 case DW_LNE_define_file
:
21073 const char *cur_file
;
21074 unsigned int mod_time
, length
;
21077 cur_file
= read_direct_string (abfd
, line_ptr
,
21079 line_ptr
+= bytes_read
;
21080 dindex
= (dir_index
)
21081 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21082 line_ptr
+= bytes_read
;
21084 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21085 line_ptr
+= bytes_read
;
21087 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21088 line_ptr
+= bytes_read
;
21089 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
21092 case DW_LNE_set_discriminator
:
21094 /* The discriminator is not interesting to the
21095 debugger; just ignore it. We still need to
21096 check its value though:
21097 if there are consecutive entries for the same
21098 (non-prologue) line we want to coalesce them.
21101 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21102 line_ptr
+= bytes_read
;
21104 state_machine
.handle_set_discriminator (discr
);
21108 complaint (_("mangled .debug_line section"));
21111 /* Make sure that we parsed the extended op correctly. If e.g.
21112 we expected a different address size than the producer used,
21113 we may have read the wrong number of bytes. */
21114 if (line_ptr
!= extended_end
)
21116 complaint (_("mangled .debug_line section"));
21121 state_machine
.handle_copy ();
21123 case DW_LNS_advance_pc
:
21126 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21127 line_ptr
+= bytes_read
;
21129 state_machine
.handle_advance_pc (adjust
);
21132 case DW_LNS_advance_line
:
21135 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
21136 line_ptr
+= bytes_read
;
21138 state_machine
.handle_advance_line (line_delta
);
21141 case DW_LNS_set_file
:
21143 file_name_index file
21144 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
21146 line_ptr
+= bytes_read
;
21148 state_machine
.handle_set_file (file
);
21151 case DW_LNS_set_column
:
21152 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21153 line_ptr
+= bytes_read
;
21155 case DW_LNS_negate_stmt
:
21156 state_machine
.handle_negate_stmt ();
21158 case DW_LNS_set_basic_block
:
21160 /* Add to the address register of the state machine the
21161 address increment value corresponding to special opcode
21162 255. I.e., this value is scaled by the minimum
21163 instruction length since special opcode 255 would have
21164 scaled the increment. */
21165 case DW_LNS_const_add_pc
:
21166 state_machine
.handle_const_add_pc ();
21168 case DW_LNS_fixed_advance_pc
:
21170 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
21173 state_machine
.handle_fixed_advance_pc (addr_adj
);
21178 /* Unknown standard opcode, ignore it. */
21181 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
21183 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21184 line_ptr
+= bytes_read
;
21191 dwarf2_debug_line_missing_end_sequence_complaint ();
21193 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
21194 in which case we still finish recording the last line). */
21195 state_machine
.record_line (true);
21199 /* Decode the Line Number Program (LNP) for the given line_header
21200 structure and CU. The actual information extracted and the type
21201 of structures created from the LNP depends on the value of PST.
21203 1. If PST is NULL, then this procedure uses the data from the program
21204 to create all necessary symbol tables, and their linetables.
21206 2. If PST is not NULL, this procedure reads the program to determine
21207 the list of files included by the unit represented by PST, and
21208 builds all the associated partial symbol tables.
21210 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21211 It is used for relative paths in the line table.
21212 NOTE: When processing partial symtabs (pst != NULL),
21213 comp_dir == pst->dirname.
21215 NOTE: It is important that psymtabs have the same file name (via strcmp)
21216 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21217 symtab we don't use it in the name of the psymtabs we create.
21218 E.g. expand_line_sal requires this when finding psymtabs to expand.
21219 A good testcase for this is mb-inline.exp.
21221 LOWPC is the lowest address in CU (or 0 if not known).
21223 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21224 for its PC<->lines mapping information. Otherwise only the filename
21225 table is read in. */
21228 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21229 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
21230 CORE_ADDR lowpc
, int decode_mapping
)
21232 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21233 const int decode_for_pst_p
= (pst
!= NULL
);
21235 if (decode_mapping
)
21236 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21238 if (decode_for_pst_p
)
21242 /* Now that we're done scanning the Line Header Program, we can
21243 create the psymtab of each included file. */
21244 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
21245 if (lh
->file_names
[file_index
].included_p
== 1)
21247 gdb::unique_xmalloc_ptr
<char> name_holder
;
21248 const char *include_name
=
21249 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
21251 if (include_name
!= NULL
)
21252 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21257 /* Make sure a symtab is created for every file, even files
21258 which contain only variables (i.e. no code with associated
21260 buildsym_compunit
*builder
= cu
->get_builder ();
21261 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
21264 for (i
= 0; i
< lh
->file_names
.size (); i
++)
21266 file_entry
&fe
= lh
->file_names
[i
];
21268 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
21270 if (builder
->get_current_subfile ()->symtab
== NULL
)
21272 builder
->get_current_subfile ()->symtab
21273 = allocate_symtab (cust
,
21274 builder
->get_current_subfile ()->name
);
21276 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
21281 /* Start a subfile for DWARF. FILENAME is the name of the file and
21282 DIRNAME the name of the source directory which contains FILENAME
21283 or NULL if not known.
21284 This routine tries to keep line numbers from identical absolute and
21285 relative file names in a common subfile.
21287 Using the `list' example from the GDB testsuite, which resides in
21288 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21289 of /srcdir/list0.c yields the following debugging information for list0.c:
21291 DW_AT_name: /srcdir/list0.c
21292 DW_AT_comp_dir: /compdir
21293 files.files[0].name: list0.h
21294 files.files[0].dir: /srcdir
21295 files.files[1].name: list0.c
21296 files.files[1].dir: /srcdir
21298 The line number information for list0.c has to end up in a single
21299 subfile, so that `break /srcdir/list0.c:1' works as expected.
21300 start_subfile will ensure that this happens provided that we pass the
21301 concatenation of files.files[1].dir and files.files[1].name as the
21305 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
21306 const char *dirname
)
21310 /* In order not to lose the line information directory,
21311 we concatenate it to the filename when it makes sense.
21312 Note that the Dwarf3 standard says (speaking of filenames in line
21313 information): ``The directory index is ignored for file names
21314 that represent full path names''. Thus ignoring dirname in the
21315 `else' branch below isn't an issue. */
21317 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21319 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21323 cu
->get_builder ()->start_subfile (filename
);
21329 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
21330 buildsym_compunit constructor. */
21332 struct compunit_symtab
*
21333 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
21336 gdb_assert (m_builder
== nullptr);
21338 m_builder
.reset (new struct buildsym_compunit
21339 (per_cu
->dwarf2_per_objfile
->objfile
,
21340 name
, comp_dir
, language
, low_pc
));
21342 list_in_scope
= get_builder ()->get_file_symbols ();
21344 get_builder ()->record_debugformat ("DWARF 2");
21345 get_builder ()->record_producer (producer
);
21347 processing_has_namespace_info
= false;
21349 return get_builder ()->get_compunit_symtab ();
21353 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21354 struct dwarf2_cu
*cu
)
21356 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21357 struct comp_unit_head
*cu_header
= &cu
->header
;
21359 /* NOTE drow/2003-01-30: There used to be a comment and some special
21360 code here to turn a symbol with DW_AT_external and a
21361 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21362 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21363 with some versions of binutils) where shared libraries could have
21364 relocations against symbols in their debug information - the
21365 minimal symbol would have the right address, but the debug info
21366 would not. It's no longer necessary, because we will explicitly
21367 apply relocations when we read in the debug information now. */
21369 /* A DW_AT_location attribute with no contents indicates that a
21370 variable has been optimized away. */
21371 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21373 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21377 /* Handle one degenerate form of location expression specially, to
21378 preserve GDB's previous behavior when section offsets are
21379 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
21380 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
21382 if (attr_form_is_block (attr
)
21383 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21384 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21385 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21386 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
21387 && (DW_BLOCK (attr
)->size
21388 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21390 unsigned int dummy
;
21392 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21393 SYMBOL_VALUE_ADDRESS (sym
) =
21394 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21396 SYMBOL_VALUE_ADDRESS (sym
) =
21397 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21398 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21399 fixup_symbol_section (sym
, objfile
);
21400 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21401 SYMBOL_SECTION (sym
));
21405 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21406 expression evaluator, and use LOC_COMPUTED only when necessary
21407 (i.e. when the value of a register or memory location is
21408 referenced, or a thread-local block, etc.). Then again, it might
21409 not be worthwhile. I'm assuming that it isn't unless performance
21410 or memory numbers show me otherwise. */
21412 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21414 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21415 cu
->has_loclist
= true;
21418 /* Given a pointer to a DWARF information entry, figure out if we need
21419 to make a symbol table entry for it, and if so, create a new entry
21420 and return a pointer to it.
21421 If TYPE is NULL, determine symbol type from the die, otherwise
21422 used the passed type.
21423 If SPACE is not NULL, use it to hold the new symbol. If it is
21424 NULL, allocate a new symbol on the objfile's obstack. */
21426 static struct symbol
*
21427 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21428 struct symbol
*space
)
21430 struct dwarf2_per_objfile
*dwarf2_per_objfile
21431 = cu
->per_cu
->dwarf2_per_objfile
;
21432 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21433 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21434 struct symbol
*sym
= NULL
;
21436 struct attribute
*attr
= NULL
;
21437 struct attribute
*attr2
= NULL
;
21438 CORE_ADDR baseaddr
;
21439 struct pending
**list_to_add
= NULL
;
21441 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21443 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21445 name
= dwarf2_name (die
, cu
);
21448 const char *linkagename
;
21449 int suppress_add
= 0;
21454 sym
= allocate_symbol (objfile
);
21455 OBJSTAT (objfile
, n_syms
++);
21457 /* Cache this symbol's name and the name's demangled form (if any). */
21458 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21459 linkagename
= dwarf2_physname (name
, die
, cu
);
21460 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21462 /* Fortran does not have mangling standard and the mangling does differ
21463 between gfortran, iFort etc. */
21464 if (cu
->language
== language_fortran
21465 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21466 symbol_set_demangled_name (&(sym
->ginfo
),
21467 dwarf2_full_name (name
, die
, cu
),
21470 /* Default assumptions.
21471 Use the passed type or decode it from the die. */
21472 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21473 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21475 SYMBOL_TYPE (sym
) = type
;
21477 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21478 attr
= dwarf2_attr (die
,
21479 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21483 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21486 attr
= dwarf2_attr (die
,
21487 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21491 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21492 struct file_entry
*fe
;
21494 if (cu
->line_header
!= NULL
)
21495 fe
= cu
->line_header
->file_name_at (file_index
);
21500 complaint (_("file index out of range"));
21502 symbol_set_symtab (sym
, fe
->symtab
);
21508 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21513 addr
= attr_value_as_address (attr
);
21514 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21515 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21517 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21518 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21519 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21520 add_symbol_to_list (sym
, cu
->list_in_scope
);
21522 case DW_TAG_subprogram
:
21523 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21525 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21526 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21527 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21528 || cu
->language
== language_ada
)
21530 /* Subprograms marked external are stored as a global symbol.
21531 Ada subprograms, whether marked external or not, are always
21532 stored as a global symbol, because we want to be able to
21533 access them globally. For instance, we want to be able
21534 to break on a nested subprogram without having to
21535 specify the context. */
21536 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21540 list_to_add
= cu
->list_in_scope
;
21543 case DW_TAG_inlined_subroutine
:
21544 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21546 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21547 SYMBOL_INLINED (sym
) = 1;
21548 list_to_add
= cu
->list_in_scope
;
21550 case DW_TAG_template_value_param
:
21552 /* Fall through. */
21553 case DW_TAG_constant
:
21554 case DW_TAG_variable
:
21555 case DW_TAG_member
:
21556 /* Compilation with minimal debug info may result in
21557 variables with missing type entries. Change the
21558 misleading `void' type to something sensible. */
21559 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21560 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21562 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21563 /* In the case of DW_TAG_member, we should only be called for
21564 static const members. */
21565 if (die
->tag
== DW_TAG_member
)
21567 /* dwarf2_add_field uses die_is_declaration,
21568 so we do the same. */
21569 gdb_assert (die_is_declaration (die
, cu
));
21574 dwarf2_const_value (attr
, sym
, cu
);
21575 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21578 if (attr2
&& (DW_UNSND (attr2
) != 0))
21579 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21581 list_to_add
= cu
->list_in_scope
;
21585 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21588 var_decode_location (attr
, sym
, cu
);
21589 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21591 /* Fortran explicitly imports any global symbols to the local
21592 scope by DW_TAG_common_block. */
21593 if (cu
->language
== language_fortran
&& die
->parent
21594 && die
->parent
->tag
== DW_TAG_common_block
)
21597 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21598 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21599 && !dwarf2_per_objfile
->has_section_at_zero
)
21601 /* When a static variable is eliminated by the linker,
21602 the corresponding debug information is not stripped
21603 out, but the variable address is set to null;
21604 do not add such variables into symbol table. */
21606 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21608 /* Workaround gfortran PR debug/40040 - it uses
21609 DW_AT_location for variables in -fPIC libraries which may
21610 get overriden by other libraries/executable and get
21611 a different address. Resolve it by the minimal symbol
21612 which may come from inferior's executable using copy
21613 relocation. Make this workaround only for gfortran as for
21614 other compilers GDB cannot guess the minimal symbol
21615 Fortran mangling kind. */
21616 if (cu
->language
== language_fortran
&& die
->parent
21617 && die
->parent
->tag
== DW_TAG_module
21619 && startswith (cu
->producer
, "GNU Fortran"))
21620 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21622 /* A variable with DW_AT_external is never static,
21623 but it may be block-scoped. */
21625 = ((cu
->list_in_scope
21626 == cu
->get_builder ()->get_file_symbols ())
21627 ? cu
->get_builder ()->get_global_symbols ()
21628 : cu
->list_in_scope
);
21631 list_to_add
= cu
->list_in_scope
;
21635 /* We do not know the address of this symbol.
21636 If it is an external symbol and we have type information
21637 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21638 The address of the variable will then be determined from
21639 the minimal symbol table whenever the variable is
21641 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21643 /* Fortran explicitly imports any global symbols to the local
21644 scope by DW_TAG_common_block. */
21645 if (cu
->language
== language_fortran
&& die
->parent
21646 && die
->parent
->tag
== DW_TAG_common_block
)
21648 /* SYMBOL_CLASS doesn't matter here because
21649 read_common_block is going to reset it. */
21651 list_to_add
= cu
->list_in_scope
;
21653 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21654 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21656 /* A variable with DW_AT_external is never static, but it
21657 may be block-scoped. */
21659 = ((cu
->list_in_scope
21660 == cu
->get_builder ()->get_file_symbols ())
21661 ? cu
->get_builder ()->get_global_symbols ()
21662 : cu
->list_in_scope
);
21664 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21666 else if (!die_is_declaration (die
, cu
))
21668 /* Use the default LOC_OPTIMIZED_OUT class. */
21669 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21671 list_to_add
= cu
->list_in_scope
;
21675 case DW_TAG_formal_parameter
:
21677 /* If we are inside a function, mark this as an argument. If
21678 not, we might be looking at an argument to an inlined function
21679 when we do not have enough information to show inlined frames;
21680 pretend it's a local variable in that case so that the user can
21682 struct context_stack
*curr
21683 = cu
->get_builder ()->get_current_context_stack ();
21684 if (curr
!= nullptr && curr
->name
!= nullptr)
21685 SYMBOL_IS_ARGUMENT (sym
) = 1;
21686 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21689 var_decode_location (attr
, sym
, cu
);
21691 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21694 dwarf2_const_value (attr
, sym
, cu
);
21697 list_to_add
= cu
->list_in_scope
;
21700 case DW_TAG_unspecified_parameters
:
21701 /* From varargs functions; gdb doesn't seem to have any
21702 interest in this information, so just ignore it for now.
21705 case DW_TAG_template_type_param
:
21707 /* Fall through. */
21708 case DW_TAG_class_type
:
21709 case DW_TAG_interface_type
:
21710 case DW_TAG_structure_type
:
21711 case DW_TAG_union_type
:
21712 case DW_TAG_set_type
:
21713 case DW_TAG_enumeration_type
:
21714 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21715 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21718 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21719 really ever be static objects: otherwise, if you try
21720 to, say, break of a class's method and you're in a file
21721 which doesn't mention that class, it won't work unless
21722 the check for all static symbols in lookup_symbol_aux
21723 saves you. See the OtherFileClass tests in
21724 gdb.c++/namespace.exp. */
21728 buildsym_compunit
*builder
= cu
->get_builder ();
21730 = (cu
->list_in_scope
== builder
->get_file_symbols ()
21731 && cu
->language
== language_cplus
21732 ? builder
->get_global_symbols ()
21733 : cu
->list_in_scope
);
21735 /* The semantics of C++ state that "struct foo {
21736 ... }" also defines a typedef for "foo". */
21737 if (cu
->language
== language_cplus
21738 || cu
->language
== language_ada
21739 || cu
->language
== language_d
21740 || cu
->language
== language_rust
)
21742 /* The symbol's name is already allocated along
21743 with this objfile, so we don't need to
21744 duplicate it for the type. */
21745 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21746 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21751 case DW_TAG_typedef
:
21752 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21753 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21754 list_to_add
= cu
->list_in_scope
;
21756 case DW_TAG_base_type
:
21757 case DW_TAG_subrange_type
:
21758 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21759 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21760 list_to_add
= cu
->list_in_scope
;
21762 case DW_TAG_enumerator
:
21763 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21766 dwarf2_const_value (attr
, sym
, cu
);
21769 /* NOTE: carlton/2003-11-10: See comment above in the
21770 DW_TAG_class_type, etc. block. */
21773 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
21774 && cu
->language
== language_cplus
21775 ? cu
->get_builder ()->get_global_symbols ()
21776 : cu
->list_in_scope
);
21779 case DW_TAG_imported_declaration
:
21780 case DW_TAG_namespace
:
21781 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21782 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21784 case DW_TAG_module
:
21785 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21786 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21787 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21789 case DW_TAG_common_block
:
21790 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21791 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21792 add_symbol_to_list (sym
, cu
->list_in_scope
);
21795 /* Not a tag we recognize. Hopefully we aren't processing
21796 trash data, but since we must specifically ignore things
21797 we don't recognize, there is nothing else we should do at
21799 complaint (_("unsupported tag: '%s'"),
21800 dwarf_tag_name (die
->tag
));
21806 sym
->hash_next
= objfile
->template_symbols
;
21807 objfile
->template_symbols
= sym
;
21808 list_to_add
= NULL
;
21811 if (list_to_add
!= NULL
)
21812 add_symbol_to_list (sym
, list_to_add
);
21814 /* For the benefit of old versions of GCC, check for anonymous
21815 namespaces based on the demangled name. */
21816 if (!cu
->processing_has_namespace_info
21817 && cu
->language
== language_cplus
)
21818 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21823 /* Given an attr with a DW_FORM_dataN value in host byte order,
21824 zero-extend it as appropriate for the symbol's type. The DWARF
21825 standard (v4) is not entirely clear about the meaning of using
21826 DW_FORM_dataN for a constant with a signed type, where the type is
21827 wider than the data. The conclusion of a discussion on the DWARF
21828 list was that this is unspecified. We choose to always zero-extend
21829 because that is the interpretation long in use by GCC. */
21832 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21833 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21835 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21836 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21837 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21838 LONGEST l
= DW_UNSND (attr
);
21840 if (bits
< sizeof (*value
) * 8)
21842 l
&= ((LONGEST
) 1 << bits
) - 1;
21845 else if (bits
== sizeof (*value
) * 8)
21849 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21850 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21857 /* Read a constant value from an attribute. Either set *VALUE, or if
21858 the value does not fit in *VALUE, set *BYTES - either already
21859 allocated on the objfile obstack, or newly allocated on OBSTACK,
21860 or, set *BATON, if we translated the constant to a location
21864 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21865 const char *name
, struct obstack
*obstack
,
21866 struct dwarf2_cu
*cu
,
21867 LONGEST
*value
, const gdb_byte
**bytes
,
21868 struct dwarf2_locexpr_baton
**baton
)
21870 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21871 struct comp_unit_head
*cu_header
= &cu
->header
;
21872 struct dwarf_block
*blk
;
21873 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21874 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21880 switch (attr
->form
)
21883 case DW_FORM_addrx
:
21884 case DW_FORM_GNU_addr_index
:
21888 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21889 dwarf2_const_value_length_mismatch_complaint (name
,
21890 cu_header
->addr_size
,
21891 TYPE_LENGTH (type
));
21892 /* Symbols of this form are reasonably rare, so we just
21893 piggyback on the existing location code rather than writing
21894 a new implementation of symbol_computed_ops. */
21895 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21896 (*baton
)->per_cu
= cu
->per_cu
;
21897 gdb_assert ((*baton
)->per_cu
);
21899 (*baton
)->size
= 2 + cu_header
->addr_size
;
21900 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21901 (*baton
)->data
= data
;
21903 data
[0] = DW_OP_addr
;
21904 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21905 byte_order
, DW_ADDR (attr
));
21906 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21909 case DW_FORM_string
:
21912 case DW_FORM_GNU_str_index
:
21913 case DW_FORM_GNU_strp_alt
:
21914 /* DW_STRING is already allocated on the objfile obstack, point
21916 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21918 case DW_FORM_block1
:
21919 case DW_FORM_block2
:
21920 case DW_FORM_block4
:
21921 case DW_FORM_block
:
21922 case DW_FORM_exprloc
:
21923 case DW_FORM_data16
:
21924 blk
= DW_BLOCK (attr
);
21925 if (TYPE_LENGTH (type
) != blk
->size
)
21926 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21927 TYPE_LENGTH (type
));
21928 *bytes
= blk
->data
;
21931 /* The DW_AT_const_value attributes are supposed to carry the
21932 symbol's value "represented as it would be on the target
21933 architecture." By the time we get here, it's already been
21934 converted to host endianness, so we just need to sign- or
21935 zero-extend it as appropriate. */
21936 case DW_FORM_data1
:
21937 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21939 case DW_FORM_data2
:
21940 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21942 case DW_FORM_data4
:
21943 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21945 case DW_FORM_data8
:
21946 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21949 case DW_FORM_sdata
:
21950 case DW_FORM_implicit_const
:
21951 *value
= DW_SND (attr
);
21954 case DW_FORM_udata
:
21955 *value
= DW_UNSND (attr
);
21959 complaint (_("unsupported const value attribute form: '%s'"),
21960 dwarf_form_name (attr
->form
));
21967 /* Copy constant value from an attribute to a symbol. */
21970 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21971 struct dwarf2_cu
*cu
)
21973 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21975 const gdb_byte
*bytes
;
21976 struct dwarf2_locexpr_baton
*baton
;
21978 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21979 SYMBOL_PRINT_NAME (sym
),
21980 &objfile
->objfile_obstack
, cu
,
21981 &value
, &bytes
, &baton
);
21985 SYMBOL_LOCATION_BATON (sym
) = baton
;
21986 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21988 else if (bytes
!= NULL
)
21990 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21991 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21995 SYMBOL_VALUE (sym
) = value
;
21996 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
22000 /* Return the type of the die in question using its DW_AT_type attribute. */
22002 static struct type
*
22003 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22005 struct attribute
*type_attr
;
22007 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
22010 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22011 /* A missing DW_AT_type represents a void type. */
22012 return objfile_type (objfile
)->builtin_void
;
22015 return lookup_die_type (die
, type_attr
, cu
);
22018 /* True iff CU's producer generates GNAT Ada auxiliary information
22019 that allows to find parallel types through that information instead
22020 of having to do expensive parallel lookups by type name. */
22023 need_gnat_info (struct dwarf2_cu
*cu
)
22025 /* Assume that the Ada compiler was GNAT, which always produces
22026 the auxiliary information. */
22027 return (cu
->language
== language_ada
);
22030 /* Return the auxiliary type of the die in question using its
22031 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
22032 attribute is not present. */
22034 static struct type
*
22035 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22037 struct attribute
*type_attr
;
22039 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
22043 return lookup_die_type (die
, type_attr
, cu
);
22046 /* If DIE has a descriptive_type attribute, then set the TYPE's
22047 descriptive type accordingly. */
22050 set_descriptive_type (struct type
*type
, struct die_info
*die
,
22051 struct dwarf2_cu
*cu
)
22053 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
22055 if (descriptive_type
)
22057 ALLOCATE_GNAT_AUX_TYPE (type
);
22058 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
22062 /* Return the containing type of the die in question using its
22063 DW_AT_containing_type attribute. */
22065 static struct type
*
22066 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22068 struct attribute
*type_attr
;
22069 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22071 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
22073 error (_("Dwarf Error: Problem turning containing type into gdb type "
22074 "[in module %s]"), objfile_name (objfile
));
22076 return lookup_die_type (die
, type_attr
, cu
);
22079 /* Return an error marker type to use for the ill formed type in DIE/CU. */
22081 static struct type
*
22082 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
22084 struct dwarf2_per_objfile
*dwarf2_per_objfile
22085 = cu
->per_cu
->dwarf2_per_objfile
;
22086 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22089 std::string message
22090 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
22091 objfile_name (objfile
),
22092 sect_offset_str (cu
->header
.sect_off
),
22093 sect_offset_str (die
->sect_off
));
22094 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
22095 message
.c_str (), message
.length ());
22097 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
22100 /* Look up the type of DIE in CU using its type attribute ATTR.
22101 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
22102 DW_AT_containing_type.
22103 If there is no type substitute an error marker. */
22105 static struct type
*
22106 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
22107 struct dwarf2_cu
*cu
)
22109 struct dwarf2_per_objfile
*dwarf2_per_objfile
22110 = cu
->per_cu
->dwarf2_per_objfile
;
22111 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22112 struct type
*this_type
;
22114 gdb_assert (attr
->name
== DW_AT_type
22115 || attr
->name
== DW_AT_GNAT_descriptive_type
22116 || attr
->name
== DW_AT_containing_type
);
22118 /* First see if we have it cached. */
22120 if (attr
->form
== DW_FORM_GNU_ref_alt
)
22122 struct dwarf2_per_cu_data
*per_cu
;
22123 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22125 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
22126 dwarf2_per_objfile
);
22127 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
22129 else if (attr_form_is_ref (attr
))
22131 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22133 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
22135 else if (attr
->form
== DW_FORM_ref_sig8
)
22137 ULONGEST signature
= DW_SIGNATURE (attr
);
22139 return get_signatured_type (die
, signature
, cu
);
22143 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
22144 " at %s [in module %s]"),
22145 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
22146 objfile_name (objfile
));
22147 return build_error_marker_type (cu
, die
);
22150 /* If not cached we need to read it in. */
22152 if (this_type
== NULL
)
22154 struct die_info
*type_die
= NULL
;
22155 struct dwarf2_cu
*type_cu
= cu
;
22157 if (attr_form_is_ref (attr
))
22158 type_die
= follow_die_ref (die
, attr
, &type_cu
);
22159 if (type_die
== NULL
)
22160 return build_error_marker_type (cu
, die
);
22161 /* If we find the type now, it's probably because the type came
22162 from an inter-CU reference and the type's CU got expanded before
22164 this_type
= read_type_die (type_die
, type_cu
);
22167 /* If we still don't have a type use an error marker. */
22169 if (this_type
== NULL
)
22170 return build_error_marker_type (cu
, die
);
22175 /* Return the type in DIE, CU.
22176 Returns NULL for invalid types.
22178 This first does a lookup in die_type_hash,
22179 and only reads the die in if necessary.
22181 NOTE: This can be called when reading in partial or full symbols. */
22183 static struct type
*
22184 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
22186 struct type
*this_type
;
22188 this_type
= get_die_type (die
, cu
);
22192 return read_type_die_1 (die
, cu
);
22195 /* Read the type in DIE, CU.
22196 Returns NULL for invalid types. */
22198 static struct type
*
22199 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
22201 struct type
*this_type
= NULL
;
22205 case DW_TAG_class_type
:
22206 case DW_TAG_interface_type
:
22207 case DW_TAG_structure_type
:
22208 case DW_TAG_union_type
:
22209 this_type
= read_structure_type (die
, cu
);
22211 case DW_TAG_enumeration_type
:
22212 this_type
= read_enumeration_type (die
, cu
);
22214 case DW_TAG_subprogram
:
22215 case DW_TAG_subroutine_type
:
22216 case DW_TAG_inlined_subroutine
:
22217 this_type
= read_subroutine_type (die
, cu
);
22219 case DW_TAG_array_type
:
22220 this_type
= read_array_type (die
, cu
);
22222 case DW_TAG_set_type
:
22223 this_type
= read_set_type (die
, cu
);
22225 case DW_TAG_pointer_type
:
22226 this_type
= read_tag_pointer_type (die
, cu
);
22228 case DW_TAG_ptr_to_member_type
:
22229 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22231 case DW_TAG_reference_type
:
22232 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22234 case DW_TAG_rvalue_reference_type
:
22235 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22237 case DW_TAG_const_type
:
22238 this_type
= read_tag_const_type (die
, cu
);
22240 case DW_TAG_volatile_type
:
22241 this_type
= read_tag_volatile_type (die
, cu
);
22243 case DW_TAG_restrict_type
:
22244 this_type
= read_tag_restrict_type (die
, cu
);
22246 case DW_TAG_string_type
:
22247 this_type
= read_tag_string_type (die
, cu
);
22249 case DW_TAG_typedef
:
22250 this_type
= read_typedef (die
, cu
);
22252 case DW_TAG_subrange_type
:
22253 this_type
= read_subrange_type (die
, cu
);
22255 case DW_TAG_base_type
:
22256 this_type
= read_base_type (die
, cu
);
22258 case DW_TAG_unspecified_type
:
22259 this_type
= read_unspecified_type (die
, cu
);
22261 case DW_TAG_namespace
:
22262 this_type
= read_namespace_type (die
, cu
);
22264 case DW_TAG_module
:
22265 this_type
= read_module_type (die
, cu
);
22267 case DW_TAG_atomic_type
:
22268 this_type
= read_tag_atomic_type (die
, cu
);
22271 complaint (_("unexpected tag in read_type_die: '%s'"),
22272 dwarf_tag_name (die
->tag
));
22279 /* See if we can figure out if the class lives in a namespace. We do
22280 this by looking for a member function; its demangled name will
22281 contain namespace info, if there is any.
22282 Return the computed name or NULL.
22283 Space for the result is allocated on the objfile's obstack.
22284 This is the full-die version of guess_partial_die_structure_name.
22285 In this case we know DIE has no useful parent. */
22288 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22290 struct die_info
*spec_die
;
22291 struct dwarf2_cu
*spec_cu
;
22292 struct die_info
*child
;
22293 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22296 spec_die
= die_specification (die
, &spec_cu
);
22297 if (spec_die
!= NULL
)
22303 for (child
= die
->child
;
22305 child
= child
->sibling
)
22307 if (child
->tag
== DW_TAG_subprogram
)
22309 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22311 if (linkage_name
!= NULL
)
22314 = language_class_name_from_physname (cu
->language_defn
,
22318 if (actual_name
!= NULL
)
22320 const char *die_name
= dwarf2_name (die
, cu
);
22322 if (die_name
!= NULL
22323 && strcmp (die_name
, actual_name
) != 0)
22325 /* Strip off the class name from the full name.
22326 We want the prefix. */
22327 int die_name_len
= strlen (die_name
);
22328 int actual_name_len
= strlen (actual_name
);
22330 /* Test for '::' as a sanity check. */
22331 if (actual_name_len
> die_name_len
+ 2
22332 && actual_name
[actual_name_len
22333 - die_name_len
- 1] == ':')
22334 name
= (char *) obstack_copy0 (
22335 &objfile
->per_bfd
->storage_obstack
,
22336 actual_name
, actual_name_len
- die_name_len
- 2);
22339 xfree (actual_name
);
22348 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22349 prefix part in such case. See
22350 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22352 static const char *
22353 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22355 struct attribute
*attr
;
22358 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22359 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22362 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22365 attr
= dw2_linkage_name_attr (die
, cu
);
22366 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22369 /* dwarf2_name had to be already called. */
22370 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22372 /* Strip the base name, keep any leading namespaces/classes. */
22373 base
= strrchr (DW_STRING (attr
), ':');
22374 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22377 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22378 return (char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22380 &base
[-1] - DW_STRING (attr
));
22383 /* Return the name of the namespace/class that DIE is defined within,
22384 or "" if we can't tell. The caller should not xfree the result.
22386 For example, if we're within the method foo() in the following
22396 then determine_prefix on foo's die will return "N::C". */
22398 static const char *
22399 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22401 struct dwarf2_per_objfile
*dwarf2_per_objfile
22402 = cu
->per_cu
->dwarf2_per_objfile
;
22403 struct die_info
*parent
, *spec_die
;
22404 struct dwarf2_cu
*spec_cu
;
22405 struct type
*parent_type
;
22406 const char *retval
;
22408 if (cu
->language
!= language_cplus
22409 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22410 && cu
->language
!= language_rust
)
22413 retval
= anonymous_struct_prefix (die
, cu
);
22417 /* We have to be careful in the presence of DW_AT_specification.
22418 For example, with GCC 3.4, given the code
22422 // Definition of N::foo.
22426 then we'll have a tree of DIEs like this:
22428 1: DW_TAG_compile_unit
22429 2: DW_TAG_namespace // N
22430 3: DW_TAG_subprogram // declaration of N::foo
22431 4: DW_TAG_subprogram // definition of N::foo
22432 DW_AT_specification // refers to die #3
22434 Thus, when processing die #4, we have to pretend that we're in
22435 the context of its DW_AT_specification, namely the contex of die
22438 spec_die
= die_specification (die
, &spec_cu
);
22439 if (spec_die
== NULL
)
22440 parent
= die
->parent
;
22443 parent
= spec_die
->parent
;
22447 if (parent
== NULL
)
22449 else if (parent
->building_fullname
)
22452 const char *parent_name
;
22454 /* It has been seen on RealView 2.2 built binaries,
22455 DW_TAG_template_type_param types actually _defined_ as
22456 children of the parent class:
22459 template class <class Enum> Class{};
22460 Class<enum E> class_e;
22462 1: DW_TAG_class_type (Class)
22463 2: DW_TAG_enumeration_type (E)
22464 3: DW_TAG_enumerator (enum1:0)
22465 3: DW_TAG_enumerator (enum2:1)
22467 2: DW_TAG_template_type_param
22468 DW_AT_type DW_FORM_ref_udata (E)
22470 Besides being broken debug info, it can put GDB into an
22471 infinite loop. Consider:
22473 When we're building the full name for Class<E>, we'll start
22474 at Class, and go look over its template type parameters,
22475 finding E. We'll then try to build the full name of E, and
22476 reach here. We're now trying to build the full name of E,
22477 and look over the parent DIE for containing scope. In the
22478 broken case, if we followed the parent DIE of E, we'd again
22479 find Class, and once again go look at its template type
22480 arguments, etc., etc. Simply don't consider such parent die
22481 as source-level parent of this die (it can't be, the language
22482 doesn't allow it), and break the loop here. */
22483 name
= dwarf2_name (die
, cu
);
22484 parent_name
= dwarf2_name (parent
, cu
);
22485 complaint (_("template param type '%s' defined within parent '%s'"),
22486 name
? name
: "<unknown>",
22487 parent_name
? parent_name
: "<unknown>");
22491 switch (parent
->tag
)
22493 case DW_TAG_namespace
:
22494 parent_type
= read_type_die (parent
, cu
);
22495 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22496 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22497 Work around this problem here. */
22498 if (cu
->language
== language_cplus
22499 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
22501 /* We give a name to even anonymous namespaces. */
22502 return TYPE_NAME (parent_type
);
22503 case DW_TAG_class_type
:
22504 case DW_TAG_interface_type
:
22505 case DW_TAG_structure_type
:
22506 case DW_TAG_union_type
:
22507 case DW_TAG_module
:
22508 parent_type
= read_type_die (parent
, cu
);
22509 if (TYPE_NAME (parent_type
) != NULL
)
22510 return TYPE_NAME (parent_type
);
22512 /* An anonymous structure is only allowed non-static data
22513 members; no typedefs, no member functions, et cetera.
22514 So it does not need a prefix. */
22516 case DW_TAG_compile_unit
:
22517 case DW_TAG_partial_unit
:
22518 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22519 if (cu
->language
== language_cplus
22520 && !dwarf2_per_objfile
->types
.empty ()
22521 && die
->child
!= NULL
22522 && (die
->tag
== DW_TAG_class_type
22523 || die
->tag
== DW_TAG_structure_type
22524 || die
->tag
== DW_TAG_union_type
))
22526 char *name
= guess_full_die_structure_name (die
, cu
);
22531 case DW_TAG_enumeration_type
:
22532 parent_type
= read_type_die (parent
, cu
);
22533 if (TYPE_DECLARED_CLASS (parent_type
))
22535 if (TYPE_NAME (parent_type
) != NULL
)
22536 return TYPE_NAME (parent_type
);
22539 /* Fall through. */
22541 return determine_prefix (parent
, cu
);
22545 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22546 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22547 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22548 an obconcat, otherwise allocate storage for the result. The CU argument is
22549 used to determine the language and hence, the appropriate separator. */
22551 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22554 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22555 int physname
, struct dwarf2_cu
*cu
)
22557 const char *lead
= "";
22560 if (suffix
== NULL
|| suffix
[0] == '\0'
22561 || prefix
== NULL
|| prefix
[0] == '\0')
22563 else if (cu
->language
== language_d
)
22565 /* For D, the 'main' function could be defined in any module, but it
22566 should never be prefixed. */
22567 if (strcmp (suffix
, "D main") == 0)
22575 else if (cu
->language
== language_fortran
&& physname
)
22577 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22578 DW_AT_MIPS_linkage_name is preferred and used instead. */
22586 if (prefix
== NULL
)
22588 if (suffix
== NULL
)
22595 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22597 strcpy (retval
, lead
);
22598 strcat (retval
, prefix
);
22599 strcat (retval
, sep
);
22600 strcat (retval
, suffix
);
22605 /* We have an obstack. */
22606 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22610 /* Return sibling of die, NULL if no sibling. */
22612 static struct die_info
*
22613 sibling_die (struct die_info
*die
)
22615 return die
->sibling
;
22618 /* Get name of a die, return NULL if not found. */
22620 static const char *
22621 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22622 struct obstack
*obstack
)
22624 if (name
&& cu
->language
== language_cplus
)
22626 std::string canon_name
= cp_canonicalize_string (name
);
22628 if (!canon_name
.empty ())
22630 if (canon_name
!= name
)
22631 name
= (const char *) obstack_copy0 (obstack
,
22632 canon_name
.c_str (),
22633 canon_name
.length ());
22640 /* Get name of a die, return NULL if not found.
22641 Anonymous namespaces are converted to their magic string. */
22643 static const char *
22644 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22646 struct attribute
*attr
;
22647 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22649 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22650 if ((!attr
|| !DW_STRING (attr
))
22651 && die
->tag
!= DW_TAG_namespace
22652 && die
->tag
!= DW_TAG_class_type
22653 && die
->tag
!= DW_TAG_interface_type
22654 && die
->tag
!= DW_TAG_structure_type
22655 && die
->tag
!= DW_TAG_union_type
)
22660 case DW_TAG_compile_unit
:
22661 case DW_TAG_partial_unit
:
22662 /* Compilation units have a DW_AT_name that is a filename, not
22663 a source language identifier. */
22664 case DW_TAG_enumeration_type
:
22665 case DW_TAG_enumerator
:
22666 /* These tags always have simple identifiers already; no need
22667 to canonicalize them. */
22668 return DW_STRING (attr
);
22670 case DW_TAG_namespace
:
22671 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22672 return DW_STRING (attr
);
22673 return CP_ANONYMOUS_NAMESPACE_STR
;
22675 case DW_TAG_class_type
:
22676 case DW_TAG_interface_type
:
22677 case DW_TAG_structure_type
:
22678 case DW_TAG_union_type
:
22679 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22680 structures or unions. These were of the form "._%d" in GCC 4.1,
22681 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22682 and GCC 4.4. We work around this problem by ignoring these. */
22683 if (attr
&& DW_STRING (attr
)
22684 && (startswith (DW_STRING (attr
), "._")
22685 || startswith (DW_STRING (attr
), "<anonymous")))
22688 /* GCC might emit a nameless typedef that has a linkage name. See
22689 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22690 if (!attr
|| DW_STRING (attr
) == NULL
)
22692 char *demangled
= NULL
;
22694 attr
= dw2_linkage_name_attr (die
, cu
);
22695 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22698 /* Avoid demangling DW_STRING (attr) the second time on a second
22699 call for the same DIE. */
22700 if (!DW_STRING_IS_CANONICAL (attr
))
22701 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22707 /* FIXME: we already did this for the partial symbol... */
22710 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22711 demangled
, strlen (demangled
)));
22712 DW_STRING_IS_CANONICAL (attr
) = 1;
22715 /* Strip any leading namespaces/classes, keep only the base name.
22716 DW_AT_name for named DIEs does not contain the prefixes. */
22717 base
= strrchr (DW_STRING (attr
), ':');
22718 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22721 return DW_STRING (attr
);
22730 if (!DW_STRING_IS_CANONICAL (attr
))
22733 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22734 &objfile
->per_bfd
->storage_obstack
);
22735 DW_STRING_IS_CANONICAL (attr
) = 1;
22737 return DW_STRING (attr
);
22740 /* Return the die that this die in an extension of, or NULL if there
22741 is none. *EXT_CU is the CU containing DIE on input, and the CU
22742 containing the return value on output. */
22744 static struct die_info
*
22745 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22747 struct attribute
*attr
;
22749 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22753 return follow_die_ref (die
, attr
, ext_cu
);
22756 /* A convenience function that returns an "unknown" DWARF name,
22757 including the value of V. STR is the name of the entity being
22758 printed, e.g., "TAG". */
22760 static const char *
22761 dwarf_unknown (const char *str
, unsigned v
)
22763 char *cell
= get_print_cell ();
22764 xsnprintf (cell
, PRINT_CELL_SIZE
, "DW_%s_<unknown: %u>", str
, v
);
22768 /* Convert a DIE tag into its string name. */
22770 static const char *
22771 dwarf_tag_name (unsigned tag
)
22773 const char *name
= get_DW_TAG_name (tag
);
22776 return dwarf_unknown ("TAG", tag
);
22781 /* Convert a DWARF attribute code into its string name. */
22783 static const char *
22784 dwarf_attr_name (unsigned attr
)
22788 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22789 if (attr
== DW_AT_MIPS_fde
)
22790 return "DW_AT_MIPS_fde";
22792 if (attr
== DW_AT_HP_block_index
)
22793 return "DW_AT_HP_block_index";
22796 name
= get_DW_AT_name (attr
);
22799 return dwarf_unknown ("AT", attr
);
22804 /* Convert a DWARF value form code into its string name. */
22806 static const char *
22807 dwarf_form_name (unsigned form
)
22809 const char *name
= get_DW_FORM_name (form
);
22812 return dwarf_unknown ("FORM", form
);
22817 static const char *
22818 dwarf_bool_name (unsigned mybool
)
22826 /* Convert a DWARF type code into its string name. */
22828 static const char *
22829 dwarf_type_encoding_name (unsigned enc
)
22831 const char *name
= get_DW_ATE_name (enc
);
22834 return dwarf_unknown ("ATE", enc
);
22840 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22844 print_spaces (indent
, f
);
22845 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22846 dwarf_tag_name (die
->tag
), die
->abbrev
,
22847 sect_offset_str (die
->sect_off
));
22849 if (die
->parent
!= NULL
)
22851 print_spaces (indent
, f
);
22852 fprintf_unfiltered (f
, " parent at offset: %s\n",
22853 sect_offset_str (die
->parent
->sect_off
));
22856 print_spaces (indent
, f
);
22857 fprintf_unfiltered (f
, " has children: %s\n",
22858 dwarf_bool_name (die
->child
!= NULL
));
22860 print_spaces (indent
, f
);
22861 fprintf_unfiltered (f
, " attributes:\n");
22863 for (i
= 0; i
< die
->num_attrs
; ++i
)
22865 print_spaces (indent
, f
);
22866 fprintf_unfiltered (f
, " %s (%s) ",
22867 dwarf_attr_name (die
->attrs
[i
].name
),
22868 dwarf_form_name (die
->attrs
[i
].form
));
22870 switch (die
->attrs
[i
].form
)
22873 case DW_FORM_addrx
:
22874 case DW_FORM_GNU_addr_index
:
22875 fprintf_unfiltered (f
, "address: ");
22876 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22878 case DW_FORM_block2
:
22879 case DW_FORM_block4
:
22880 case DW_FORM_block
:
22881 case DW_FORM_block1
:
22882 fprintf_unfiltered (f
, "block: size %s",
22883 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22885 case DW_FORM_exprloc
:
22886 fprintf_unfiltered (f
, "expression: size %s",
22887 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22889 case DW_FORM_data16
:
22890 fprintf_unfiltered (f
, "constant of 16 bytes");
22892 case DW_FORM_ref_addr
:
22893 fprintf_unfiltered (f
, "ref address: ");
22894 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22896 case DW_FORM_GNU_ref_alt
:
22897 fprintf_unfiltered (f
, "alt ref address: ");
22898 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22904 case DW_FORM_ref_udata
:
22905 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22906 (long) (DW_UNSND (&die
->attrs
[i
])));
22908 case DW_FORM_data1
:
22909 case DW_FORM_data2
:
22910 case DW_FORM_data4
:
22911 case DW_FORM_data8
:
22912 case DW_FORM_udata
:
22913 case DW_FORM_sdata
:
22914 fprintf_unfiltered (f
, "constant: %s",
22915 pulongest (DW_UNSND (&die
->attrs
[i
])));
22917 case DW_FORM_sec_offset
:
22918 fprintf_unfiltered (f
, "section offset: %s",
22919 pulongest (DW_UNSND (&die
->attrs
[i
])));
22921 case DW_FORM_ref_sig8
:
22922 fprintf_unfiltered (f
, "signature: %s",
22923 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22925 case DW_FORM_string
:
22927 case DW_FORM_line_strp
:
22929 case DW_FORM_GNU_str_index
:
22930 case DW_FORM_GNU_strp_alt
:
22931 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22932 DW_STRING (&die
->attrs
[i
])
22933 ? DW_STRING (&die
->attrs
[i
]) : "",
22934 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22937 if (DW_UNSND (&die
->attrs
[i
]))
22938 fprintf_unfiltered (f
, "flag: TRUE");
22940 fprintf_unfiltered (f
, "flag: FALSE");
22942 case DW_FORM_flag_present
:
22943 fprintf_unfiltered (f
, "flag: TRUE");
22945 case DW_FORM_indirect
:
22946 /* The reader will have reduced the indirect form to
22947 the "base form" so this form should not occur. */
22948 fprintf_unfiltered (f
,
22949 "unexpected attribute form: DW_FORM_indirect");
22951 case DW_FORM_implicit_const
:
22952 fprintf_unfiltered (f
, "constant: %s",
22953 plongest (DW_SND (&die
->attrs
[i
])));
22956 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22957 die
->attrs
[i
].form
);
22960 fprintf_unfiltered (f
, "\n");
22965 dump_die_for_error (struct die_info
*die
)
22967 dump_die_shallow (gdb_stderr
, 0, die
);
22971 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22973 int indent
= level
* 4;
22975 gdb_assert (die
!= NULL
);
22977 if (level
>= max_level
)
22980 dump_die_shallow (f
, indent
, die
);
22982 if (die
->child
!= NULL
)
22984 print_spaces (indent
, f
);
22985 fprintf_unfiltered (f
, " Children:");
22986 if (level
+ 1 < max_level
)
22988 fprintf_unfiltered (f
, "\n");
22989 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22993 fprintf_unfiltered (f
,
22994 " [not printed, max nesting level reached]\n");
22998 if (die
->sibling
!= NULL
&& level
> 0)
23000 dump_die_1 (f
, level
, max_level
, die
->sibling
);
23004 /* This is called from the pdie macro in gdbinit.in.
23005 It's not static so gcc will keep a copy callable from gdb. */
23008 dump_die (struct die_info
*die
, int max_level
)
23010 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
23014 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
23018 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
23019 to_underlying (die
->sect_off
),
23025 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
23029 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
23031 if (attr_form_is_ref (attr
))
23032 return (sect_offset
) DW_UNSND (attr
);
23034 complaint (_("unsupported die ref attribute form: '%s'"),
23035 dwarf_form_name (attr
->form
));
23039 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
23040 * the value held by the attribute is not constant. */
23043 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
23045 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
23046 return DW_SND (attr
);
23047 else if (attr
->form
== DW_FORM_udata
23048 || attr
->form
== DW_FORM_data1
23049 || attr
->form
== DW_FORM_data2
23050 || attr
->form
== DW_FORM_data4
23051 || attr
->form
== DW_FORM_data8
)
23052 return DW_UNSND (attr
);
23055 /* For DW_FORM_data16 see attr_form_is_constant. */
23056 complaint (_("Attribute value is not a constant (%s)"),
23057 dwarf_form_name (attr
->form
));
23058 return default_value
;
23062 /* Follow reference or signature attribute ATTR of SRC_DIE.
23063 On entry *REF_CU is the CU of SRC_DIE.
23064 On exit *REF_CU is the CU of the result. */
23066 static struct die_info
*
23067 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23068 struct dwarf2_cu
**ref_cu
)
23070 struct die_info
*die
;
23072 if (attr_form_is_ref (attr
))
23073 die
= follow_die_ref (src_die
, attr
, ref_cu
);
23074 else if (attr
->form
== DW_FORM_ref_sig8
)
23075 die
= follow_die_sig (src_die
, attr
, ref_cu
);
23078 dump_die_for_error (src_die
);
23079 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
23080 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23086 /* Follow reference OFFSET.
23087 On entry *REF_CU is the CU of the source die referencing OFFSET.
23088 On exit *REF_CU is the CU of the result.
23089 Returns NULL if OFFSET is invalid. */
23091 static struct die_info
*
23092 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
23093 struct dwarf2_cu
**ref_cu
)
23095 struct die_info temp_die
;
23096 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
23097 struct dwarf2_per_objfile
*dwarf2_per_objfile
23098 = cu
->per_cu
->dwarf2_per_objfile
;
23100 gdb_assert (cu
->per_cu
!= NULL
);
23104 if (cu
->per_cu
->is_debug_types
)
23106 /* .debug_types CUs cannot reference anything outside their CU.
23107 If they need to, they have to reference a signatured type via
23108 DW_FORM_ref_sig8. */
23109 if (!offset_in_cu_p (&cu
->header
, sect_off
))
23112 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
23113 || !offset_in_cu_p (&cu
->header
, sect_off
))
23115 struct dwarf2_per_cu_data
*per_cu
;
23117 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23118 dwarf2_per_objfile
);
23120 /* If necessary, add it to the queue and load its DIEs. */
23121 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
23122 load_full_comp_unit (per_cu
, false, cu
->language
);
23124 target_cu
= per_cu
->cu
;
23126 else if (cu
->dies
== NULL
)
23128 /* We're loading full DIEs during partial symbol reading. */
23129 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
23130 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
23133 *ref_cu
= target_cu
;
23134 temp_die
.sect_off
= sect_off
;
23136 if (target_cu
!= cu
)
23137 target_cu
->ancestor
= cu
;
23139 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
23141 to_underlying (sect_off
));
23144 /* Follow reference attribute ATTR of SRC_DIE.
23145 On entry *REF_CU is the CU of SRC_DIE.
23146 On exit *REF_CU is the CU of the result. */
23148 static struct die_info
*
23149 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
23150 struct dwarf2_cu
**ref_cu
)
23152 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
23153 struct dwarf2_cu
*cu
= *ref_cu
;
23154 struct die_info
*die
;
23156 die
= follow_die_offset (sect_off
,
23157 (attr
->form
== DW_FORM_GNU_ref_alt
23158 || cu
->per_cu
->is_dwz
),
23161 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
23162 "at %s [in module %s]"),
23163 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
23164 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
23169 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
23170 Returned value is intended for DW_OP_call*. Returned
23171 dwarf2_locexpr_baton->data has lifetime of
23172 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
23174 struct dwarf2_locexpr_baton
23175 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
23176 struct dwarf2_per_cu_data
*per_cu
,
23177 CORE_ADDR (*get_frame_pc
) (void *baton
),
23178 void *baton
, bool resolve_abstract_p
)
23180 struct dwarf2_cu
*cu
;
23181 struct die_info
*die
;
23182 struct attribute
*attr
;
23183 struct dwarf2_locexpr_baton retval
;
23184 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23185 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23187 if (per_cu
->cu
== NULL
)
23188 load_cu (per_cu
, false);
23192 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23193 Instead just throw an error, not much else we can do. */
23194 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23195 sect_offset_str (sect_off
), objfile_name (objfile
));
23198 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23200 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23201 sect_offset_str (sect_off
), objfile_name (objfile
));
23203 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23204 if (!attr
&& resolve_abstract_p
23205 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
23206 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
23208 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23210 for (const auto &cand_off
23211 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
23213 struct dwarf2_cu
*cand_cu
= cu
;
23214 struct die_info
*cand
23215 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
23218 || cand
->parent
->tag
!= DW_TAG_subprogram
)
23221 CORE_ADDR pc_low
, pc_high
;
23222 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
23223 if (pc_low
== ((CORE_ADDR
) -1)
23224 || !(pc_low
<= pc
&& pc
< pc_high
))
23228 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23235 /* DWARF: "If there is no such attribute, then there is no effect.".
23236 DATA is ignored if SIZE is 0. */
23238 retval
.data
= NULL
;
23241 else if (attr_form_is_section_offset (attr
))
23243 struct dwarf2_loclist_baton loclist_baton
;
23244 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23247 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
23249 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
23251 retval
.size
= size
;
23255 if (!attr_form_is_block (attr
))
23256 error (_("Dwarf Error: DIE at %s referenced in module %s "
23257 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23258 sect_offset_str (sect_off
), objfile_name (objfile
));
23260 retval
.data
= DW_BLOCK (attr
)->data
;
23261 retval
.size
= DW_BLOCK (attr
)->size
;
23263 retval
.per_cu
= cu
->per_cu
;
23265 age_cached_comp_units (dwarf2_per_objfile
);
23270 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
23273 struct dwarf2_locexpr_baton
23274 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23275 struct dwarf2_per_cu_data
*per_cu
,
23276 CORE_ADDR (*get_frame_pc
) (void *baton
),
23279 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23281 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
23284 /* Write a constant of a given type as target-ordered bytes into
23287 static const gdb_byte
*
23288 write_constant_as_bytes (struct obstack
*obstack
,
23289 enum bfd_endian byte_order
,
23296 *len
= TYPE_LENGTH (type
);
23297 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23298 store_unsigned_integer (result
, *len
, byte_order
, value
);
23303 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23304 pointer to the constant bytes and set LEN to the length of the
23305 data. If memory is needed, allocate it on OBSTACK. If the DIE
23306 does not have a DW_AT_const_value, return NULL. */
23309 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23310 struct dwarf2_per_cu_data
*per_cu
,
23311 struct obstack
*obstack
,
23314 struct dwarf2_cu
*cu
;
23315 struct die_info
*die
;
23316 struct attribute
*attr
;
23317 const gdb_byte
*result
= NULL
;
23320 enum bfd_endian byte_order
;
23321 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23323 if (per_cu
->cu
== NULL
)
23324 load_cu (per_cu
, false);
23328 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23329 Instead just throw an error, not much else we can do. */
23330 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23331 sect_offset_str (sect_off
), objfile_name (objfile
));
23334 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23336 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23337 sect_offset_str (sect_off
), objfile_name (objfile
));
23339 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23343 byte_order
= (bfd_big_endian (objfile
->obfd
)
23344 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23346 switch (attr
->form
)
23349 case DW_FORM_addrx
:
23350 case DW_FORM_GNU_addr_index
:
23354 *len
= cu
->header
.addr_size
;
23355 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23356 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23360 case DW_FORM_string
:
23363 case DW_FORM_GNU_str_index
:
23364 case DW_FORM_GNU_strp_alt
:
23365 /* DW_STRING is already allocated on the objfile obstack, point
23367 result
= (const gdb_byte
*) DW_STRING (attr
);
23368 *len
= strlen (DW_STRING (attr
));
23370 case DW_FORM_block1
:
23371 case DW_FORM_block2
:
23372 case DW_FORM_block4
:
23373 case DW_FORM_block
:
23374 case DW_FORM_exprloc
:
23375 case DW_FORM_data16
:
23376 result
= DW_BLOCK (attr
)->data
;
23377 *len
= DW_BLOCK (attr
)->size
;
23380 /* The DW_AT_const_value attributes are supposed to carry the
23381 symbol's value "represented as it would be on the target
23382 architecture." By the time we get here, it's already been
23383 converted to host endianness, so we just need to sign- or
23384 zero-extend it as appropriate. */
23385 case DW_FORM_data1
:
23386 type
= die_type (die
, cu
);
23387 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23388 if (result
== NULL
)
23389 result
= write_constant_as_bytes (obstack
, byte_order
,
23392 case DW_FORM_data2
:
23393 type
= die_type (die
, cu
);
23394 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23395 if (result
== NULL
)
23396 result
= write_constant_as_bytes (obstack
, byte_order
,
23399 case DW_FORM_data4
:
23400 type
= die_type (die
, cu
);
23401 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23402 if (result
== NULL
)
23403 result
= write_constant_as_bytes (obstack
, byte_order
,
23406 case DW_FORM_data8
:
23407 type
= die_type (die
, cu
);
23408 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23409 if (result
== NULL
)
23410 result
= write_constant_as_bytes (obstack
, byte_order
,
23414 case DW_FORM_sdata
:
23415 case DW_FORM_implicit_const
:
23416 type
= die_type (die
, cu
);
23417 result
= write_constant_as_bytes (obstack
, byte_order
,
23418 type
, DW_SND (attr
), len
);
23421 case DW_FORM_udata
:
23422 type
= die_type (die
, cu
);
23423 result
= write_constant_as_bytes (obstack
, byte_order
,
23424 type
, DW_UNSND (attr
), len
);
23428 complaint (_("unsupported const value attribute form: '%s'"),
23429 dwarf_form_name (attr
->form
));
23436 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23437 valid type for this die is found. */
23440 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23441 struct dwarf2_per_cu_data
*per_cu
)
23443 struct dwarf2_cu
*cu
;
23444 struct die_info
*die
;
23446 if (per_cu
->cu
== NULL
)
23447 load_cu (per_cu
, false);
23452 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23456 return die_type (die
, cu
);
23459 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23463 dwarf2_get_die_type (cu_offset die_offset
,
23464 struct dwarf2_per_cu_data
*per_cu
)
23466 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23467 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23470 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23471 On entry *REF_CU is the CU of SRC_DIE.
23472 On exit *REF_CU is the CU of the result.
23473 Returns NULL if the referenced DIE isn't found. */
23475 static struct die_info
*
23476 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23477 struct dwarf2_cu
**ref_cu
)
23479 struct die_info temp_die
;
23480 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
23481 struct die_info
*die
;
23483 /* While it might be nice to assert sig_type->type == NULL here,
23484 we can get here for DW_AT_imported_declaration where we need
23485 the DIE not the type. */
23487 /* If necessary, add it to the queue and load its DIEs. */
23489 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23490 read_signatured_type (sig_type
);
23492 sig_cu
= sig_type
->per_cu
.cu
;
23493 gdb_assert (sig_cu
!= NULL
);
23494 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23495 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23496 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23497 to_underlying (temp_die
.sect_off
));
23500 struct dwarf2_per_objfile
*dwarf2_per_objfile
23501 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23503 /* For .gdb_index version 7 keep track of included TUs.
23504 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23505 if (dwarf2_per_objfile
->index_table
!= NULL
23506 && dwarf2_per_objfile
->index_table
->version
<= 7)
23508 VEC_safe_push (dwarf2_per_cu_ptr
,
23509 (*ref_cu
)->per_cu
->imported_symtabs
,
23515 sig_cu
->ancestor
= cu
;
23523 /* Follow signatured type referenced by ATTR in SRC_DIE.
23524 On entry *REF_CU is the CU of SRC_DIE.
23525 On exit *REF_CU is the CU of the result.
23526 The result is the DIE of the type.
23527 If the referenced type cannot be found an error is thrown. */
23529 static struct die_info
*
23530 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23531 struct dwarf2_cu
**ref_cu
)
23533 ULONGEST signature
= DW_SIGNATURE (attr
);
23534 struct signatured_type
*sig_type
;
23535 struct die_info
*die
;
23537 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23539 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23540 /* sig_type will be NULL if the signatured type is missing from
23542 if (sig_type
== NULL
)
23544 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23545 " from DIE at %s [in module %s]"),
23546 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23547 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23550 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23553 dump_die_for_error (src_die
);
23554 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23555 " from DIE at %s [in module %s]"),
23556 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23557 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23563 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23564 reading in and processing the type unit if necessary. */
23566 static struct type
*
23567 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23568 struct dwarf2_cu
*cu
)
23570 struct dwarf2_per_objfile
*dwarf2_per_objfile
23571 = cu
->per_cu
->dwarf2_per_objfile
;
23572 struct signatured_type
*sig_type
;
23573 struct dwarf2_cu
*type_cu
;
23574 struct die_info
*type_die
;
23577 sig_type
= lookup_signatured_type (cu
, signature
);
23578 /* sig_type will be NULL if the signatured type is missing from
23580 if (sig_type
== NULL
)
23582 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23583 " from DIE at %s [in module %s]"),
23584 hex_string (signature
), sect_offset_str (die
->sect_off
),
23585 objfile_name (dwarf2_per_objfile
->objfile
));
23586 return build_error_marker_type (cu
, die
);
23589 /* If we already know the type we're done. */
23590 if (sig_type
->type
!= NULL
)
23591 return sig_type
->type
;
23594 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23595 if (type_die
!= NULL
)
23597 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23598 is created. This is important, for example, because for c++ classes
23599 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23600 type
= read_type_die (type_die
, type_cu
);
23603 complaint (_("Dwarf Error: Cannot build signatured type %s"
23604 " referenced from DIE at %s [in module %s]"),
23605 hex_string (signature
), sect_offset_str (die
->sect_off
),
23606 objfile_name (dwarf2_per_objfile
->objfile
));
23607 type
= build_error_marker_type (cu
, die
);
23612 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23613 " from DIE at %s [in module %s]"),
23614 hex_string (signature
), sect_offset_str (die
->sect_off
),
23615 objfile_name (dwarf2_per_objfile
->objfile
));
23616 type
= build_error_marker_type (cu
, die
);
23618 sig_type
->type
= type
;
23623 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23624 reading in and processing the type unit if necessary. */
23626 static struct type
*
23627 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23628 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23630 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23631 if (attr_form_is_ref (attr
))
23633 struct dwarf2_cu
*type_cu
= cu
;
23634 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23636 return read_type_die (type_die
, type_cu
);
23638 else if (attr
->form
== DW_FORM_ref_sig8
)
23640 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23644 struct dwarf2_per_objfile
*dwarf2_per_objfile
23645 = cu
->per_cu
->dwarf2_per_objfile
;
23647 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23648 " at %s [in module %s]"),
23649 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23650 objfile_name (dwarf2_per_objfile
->objfile
));
23651 return build_error_marker_type (cu
, die
);
23655 /* Load the DIEs associated with type unit PER_CU into memory. */
23658 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23660 struct signatured_type
*sig_type
;
23662 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23663 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23665 /* We have the per_cu, but we need the signatured_type.
23666 Fortunately this is an easy translation. */
23667 gdb_assert (per_cu
->is_debug_types
);
23668 sig_type
= (struct signatured_type
*) per_cu
;
23670 gdb_assert (per_cu
->cu
== NULL
);
23672 read_signatured_type (sig_type
);
23674 gdb_assert (per_cu
->cu
!= NULL
);
23677 /* die_reader_func for read_signatured_type.
23678 This is identical to load_full_comp_unit_reader,
23679 but is kept separate for now. */
23682 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23683 const gdb_byte
*info_ptr
,
23684 struct die_info
*comp_unit_die
,
23688 struct dwarf2_cu
*cu
= reader
->cu
;
23690 gdb_assert (cu
->die_hash
== NULL
);
23692 htab_create_alloc_ex (cu
->header
.length
/ 12,
23696 &cu
->comp_unit_obstack
,
23697 hashtab_obstack_allocate
,
23698 dummy_obstack_deallocate
);
23701 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23702 &info_ptr
, comp_unit_die
);
23703 cu
->dies
= comp_unit_die
;
23704 /* comp_unit_die is not stored in die_hash, no need. */
23706 /* We try not to read any attributes in this function, because not
23707 all CUs needed for references have been loaded yet, and symbol
23708 table processing isn't initialized. But we have to set the CU language,
23709 or we won't be able to build types correctly.
23710 Similarly, if we do not read the producer, we can not apply
23711 producer-specific interpretation. */
23712 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23715 /* Read in a signatured type and build its CU and DIEs.
23716 If the type is a stub for the real type in a DWO file,
23717 read in the real type from the DWO file as well. */
23720 read_signatured_type (struct signatured_type
*sig_type
)
23722 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23724 gdb_assert (per_cu
->is_debug_types
);
23725 gdb_assert (per_cu
->cu
== NULL
);
23727 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1, false,
23728 read_signatured_type_reader
, NULL
);
23729 sig_type
->per_cu
.tu_read
= 1;
23732 /* Decode simple location descriptions.
23733 Given a pointer to a dwarf block that defines a location, compute
23734 the location and return the value.
23736 NOTE drow/2003-11-18: This function is called in two situations
23737 now: for the address of static or global variables (partial symbols
23738 only) and for offsets into structures which are expected to be
23739 (more or less) constant. The partial symbol case should go away,
23740 and only the constant case should remain. That will let this
23741 function complain more accurately. A few special modes are allowed
23742 without complaint for global variables (for instance, global
23743 register values and thread-local values).
23745 A location description containing no operations indicates that the
23746 object is optimized out. The return value is 0 for that case.
23747 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23748 callers will only want a very basic result and this can become a
23751 Note that stack[0] is unused except as a default error return. */
23754 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23756 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23758 size_t size
= blk
->size
;
23759 const gdb_byte
*data
= blk
->data
;
23760 CORE_ADDR stack
[64];
23762 unsigned int bytes_read
, unsnd
;
23768 stack
[++stacki
] = 0;
23807 stack
[++stacki
] = op
- DW_OP_lit0
;
23842 stack
[++stacki
] = op
- DW_OP_reg0
;
23844 dwarf2_complex_location_expr_complaint ();
23848 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23850 stack
[++stacki
] = unsnd
;
23852 dwarf2_complex_location_expr_complaint ();
23856 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23861 case DW_OP_const1u
:
23862 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23866 case DW_OP_const1s
:
23867 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23871 case DW_OP_const2u
:
23872 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23876 case DW_OP_const2s
:
23877 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23881 case DW_OP_const4u
:
23882 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23886 case DW_OP_const4s
:
23887 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23891 case DW_OP_const8u
:
23892 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23897 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23903 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23908 stack
[stacki
+ 1] = stack
[stacki
];
23913 stack
[stacki
- 1] += stack
[stacki
];
23917 case DW_OP_plus_uconst
:
23918 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23924 stack
[stacki
- 1] -= stack
[stacki
];
23929 /* If we're not the last op, then we definitely can't encode
23930 this using GDB's address_class enum. This is valid for partial
23931 global symbols, although the variable's address will be bogus
23934 dwarf2_complex_location_expr_complaint ();
23937 case DW_OP_GNU_push_tls_address
:
23938 case DW_OP_form_tls_address
:
23939 /* The top of the stack has the offset from the beginning
23940 of the thread control block at which the variable is located. */
23941 /* Nothing should follow this operator, so the top of stack would
23943 /* This is valid for partial global symbols, but the variable's
23944 address will be bogus in the psymtab. Make it always at least
23945 non-zero to not look as a variable garbage collected by linker
23946 which have DW_OP_addr 0. */
23948 dwarf2_complex_location_expr_complaint ();
23952 case DW_OP_GNU_uninit
:
23956 case DW_OP_GNU_addr_index
:
23957 case DW_OP_GNU_const_index
:
23958 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23965 const char *name
= get_DW_OP_name (op
);
23968 complaint (_("unsupported stack op: '%s'"),
23971 complaint (_("unsupported stack op: '%02x'"),
23975 return (stack
[stacki
]);
23978 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23979 outside of the allocated space. Also enforce minimum>0. */
23980 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23982 complaint (_("location description stack overflow"));
23988 complaint (_("location description stack underflow"));
23992 return (stack
[stacki
]);
23995 /* memory allocation interface */
23997 static struct dwarf_block
*
23998 dwarf_alloc_block (struct dwarf2_cu
*cu
)
24000 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
24003 static struct die_info
*
24004 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
24006 struct die_info
*die
;
24007 size_t size
= sizeof (struct die_info
);
24010 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
24012 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
24013 memset (die
, 0, sizeof (struct die_info
));
24018 /* Macro support. */
24020 /* Return file name relative to the compilation directory of file number I in
24021 *LH's file name table. The result is allocated using xmalloc; the caller is
24022 responsible for freeing it. */
24025 file_file_name (int file
, struct line_header
*lh
)
24027 /* Is the file number a valid index into the line header's file name
24028 table? Remember that file numbers start with one, not zero. */
24029 if (1 <= file
&& file
<= lh
->file_names
.size ())
24031 const file_entry
&fe
= lh
->file_names
[file
- 1];
24033 if (!IS_ABSOLUTE_PATH (fe
.name
))
24035 const char *dir
= fe
.include_dir (lh
);
24037 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
24039 return xstrdup (fe
.name
);
24043 /* The compiler produced a bogus file number. We can at least
24044 record the macro definitions made in the file, even if we
24045 won't be able to find the file by name. */
24046 char fake_name
[80];
24048 xsnprintf (fake_name
, sizeof (fake_name
),
24049 "<bad macro file number %d>", file
);
24051 complaint (_("bad file number in macro information (%d)"),
24054 return xstrdup (fake_name
);
24058 /* Return the full name of file number I in *LH's file name table.
24059 Use COMP_DIR as the name of the current directory of the
24060 compilation. The result is allocated using xmalloc; the caller is
24061 responsible for freeing it. */
24063 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
24065 /* Is the file number a valid index into the line header's file name
24066 table? Remember that file numbers start with one, not zero. */
24067 if (1 <= file
&& file
<= lh
->file_names
.size ())
24069 char *relative
= file_file_name (file
, lh
);
24071 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
24073 return reconcat (relative
, comp_dir
, SLASH_STRING
,
24074 relative
, (char *) NULL
);
24077 return file_file_name (file
, lh
);
24081 static struct macro_source_file
*
24082 macro_start_file (struct dwarf2_cu
*cu
,
24083 int file
, int line
,
24084 struct macro_source_file
*current_file
,
24085 struct line_header
*lh
)
24087 /* File name relative to the compilation directory of this source file. */
24088 char *file_name
= file_file_name (file
, lh
);
24090 if (! current_file
)
24092 /* Note: We don't create a macro table for this compilation unit
24093 at all until we actually get a filename. */
24094 struct macro_table
*macro_table
= cu
->get_builder ()->get_macro_table ();
24096 /* If we have no current file, then this must be the start_file
24097 directive for the compilation unit's main source file. */
24098 current_file
= macro_set_main (macro_table
, file_name
);
24099 macro_define_special (macro_table
);
24102 current_file
= macro_include (current_file
, line
, file_name
);
24106 return current_file
;
24109 static const char *
24110 consume_improper_spaces (const char *p
, const char *body
)
24114 complaint (_("macro definition contains spaces "
24115 "in formal argument list:\n`%s'"),
24127 parse_macro_definition (struct macro_source_file
*file
, int line
,
24132 /* The body string takes one of two forms. For object-like macro
24133 definitions, it should be:
24135 <macro name> " " <definition>
24137 For function-like macro definitions, it should be:
24139 <macro name> "() " <definition>
24141 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
24143 Spaces may appear only where explicitly indicated, and in the
24146 The Dwarf 2 spec says that an object-like macro's name is always
24147 followed by a space, but versions of GCC around March 2002 omit
24148 the space when the macro's definition is the empty string.
24150 The Dwarf 2 spec says that there should be no spaces between the
24151 formal arguments in a function-like macro's formal argument list,
24152 but versions of GCC around March 2002 include spaces after the
24156 /* Find the extent of the macro name. The macro name is terminated
24157 by either a space or null character (for an object-like macro) or
24158 an opening paren (for a function-like macro). */
24159 for (p
= body
; *p
; p
++)
24160 if (*p
== ' ' || *p
== '(')
24163 if (*p
== ' ' || *p
== '\0')
24165 /* It's an object-like macro. */
24166 int name_len
= p
- body
;
24167 char *name
= savestring (body
, name_len
);
24168 const char *replacement
;
24171 replacement
= body
+ name_len
+ 1;
24174 dwarf2_macro_malformed_definition_complaint (body
);
24175 replacement
= body
+ name_len
;
24178 macro_define_object (file
, line
, name
, replacement
);
24182 else if (*p
== '(')
24184 /* It's a function-like macro. */
24185 char *name
= savestring (body
, p
- body
);
24188 char **argv
= XNEWVEC (char *, argv_size
);
24192 p
= consume_improper_spaces (p
, body
);
24194 /* Parse the formal argument list. */
24195 while (*p
&& *p
!= ')')
24197 /* Find the extent of the current argument name. */
24198 const char *arg_start
= p
;
24200 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
24203 if (! *p
|| p
== arg_start
)
24204 dwarf2_macro_malformed_definition_complaint (body
);
24207 /* Make sure argv has room for the new argument. */
24208 if (argc
>= argv_size
)
24211 argv
= XRESIZEVEC (char *, argv
, argv_size
);
24214 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
24217 p
= consume_improper_spaces (p
, body
);
24219 /* Consume the comma, if present. */
24224 p
= consume_improper_spaces (p
, body
);
24233 /* Perfectly formed definition, no complaints. */
24234 macro_define_function (file
, line
, name
,
24235 argc
, (const char **) argv
,
24237 else if (*p
== '\0')
24239 /* Complain, but do define it. */
24240 dwarf2_macro_malformed_definition_complaint (body
);
24241 macro_define_function (file
, line
, name
,
24242 argc
, (const char **) argv
,
24246 /* Just complain. */
24247 dwarf2_macro_malformed_definition_complaint (body
);
24250 /* Just complain. */
24251 dwarf2_macro_malformed_definition_complaint (body
);
24257 for (i
= 0; i
< argc
; i
++)
24263 dwarf2_macro_malformed_definition_complaint (body
);
24266 /* Skip some bytes from BYTES according to the form given in FORM.
24267 Returns the new pointer. */
24269 static const gdb_byte
*
24270 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
24271 enum dwarf_form form
,
24272 unsigned int offset_size
,
24273 struct dwarf2_section_info
*section
)
24275 unsigned int bytes_read
;
24279 case DW_FORM_data1
:
24284 case DW_FORM_data2
:
24288 case DW_FORM_data4
:
24292 case DW_FORM_data8
:
24296 case DW_FORM_data16
:
24300 case DW_FORM_string
:
24301 read_direct_string (abfd
, bytes
, &bytes_read
);
24302 bytes
+= bytes_read
;
24305 case DW_FORM_sec_offset
:
24307 case DW_FORM_GNU_strp_alt
:
24308 bytes
+= offset_size
;
24311 case DW_FORM_block
:
24312 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24313 bytes
+= bytes_read
;
24316 case DW_FORM_block1
:
24317 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24319 case DW_FORM_block2
:
24320 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24322 case DW_FORM_block4
:
24323 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24326 case DW_FORM_addrx
:
24327 case DW_FORM_sdata
:
24329 case DW_FORM_udata
:
24330 case DW_FORM_GNU_addr_index
:
24331 case DW_FORM_GNU_str_index
:
24332 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24335 dwarf2_section_buffer_overflow_complaint (section
);
24340 case DW_FORM_implicit_const
:
24345 complaint (_("invalid form 0x%x in `%s'"),
24346 form
, get_section_name (section
));
24354 /* A helper for dwarf_decode_macros that handles skipping an unknown
24355 opcode. Returns an updated pointer to the macro data buffer; or,
24356 on error, issues a complaint and returns NULL. */
24358 static const gdb_byte
*
24359 skip_unknown_opcode (unsigned int opcode
,
24360 const gdb_byte
**opcode_definitions
,
24361 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24363 unsigned int offset_size
,
24364 struct dwarf2_section_info
*section
)
24366 unsigned int bytes_read
, i
;
24368 const gdb_byte
*defn
;
24370 if (opcode_definitions
[opcode
] == NULL
)
24372 complaint (_("unrecognized DW_MACFINO opcode 0x%x"),
24377 defn
= opcode_definitions
[opcode
];
24378 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24379 defn
+= bytes_read
;
24381 for (i
= 0; i
< arg
; ++i
)
24383 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24384 (enum dwarf_form
) defn
[i
], offset_size
,
24386 if (mac_ptr
== NULL
)
24388 /* skip_form_bytes already issued the complaint. */
24396 /* A helper function which parses the header of a macro section.
24397 If the macro section is the extended (for now called "GNU") type,
24398 then this updates *OFFSET_SIZE. Returns a pointer to just after
24399 the header, or issues a complaint and returns NULL on error. */
24401 static const gdb_byte
*
24402 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24404 const gdb_byte
*mac_ptr
,
24405 unsigned int *offset_size
,
24406 int section_is_gnu
)
24408 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24410 if (section_is_gnu
)
24412 unsigned int version
, flags
;
24414 version
= read_2_bytes (abfd
, mac_ptr
);
24415 if (version
!= 4 && version
!= 5)
24417 complaint (_("unrecognized version `%d' in .debug_macro section"),
24423 flags
= read_1_byte (abfd
, mac_ptr
);
24425 *offset_size
= (flags
& 1) ? 8 : 4;
24427 if ((flags
& 2) != 0)
24428 /* We don't need the line table offset. */
24429 mac_ptr
+= *offset_size
;
24431 /* Vendor opcode descriptions. */
24432 if ((flags
& 4) != 0)
24434 unsigned int i
, count
;
24436 count
= read_1_byte (abfd
, mac_ptr
);
24438 for (i
= 0; i
< count
; ++i
)
24440 unsigned int opcode
, bytes_read
;
24443 opcode
= read_1_byte (abfd
, mac_ptr
);
24445 opcode_definitions
[opcode
] = mac_ptr
;
24446 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24447 mac_ptr
+= bytes_read
;
24456 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24457 including DW_MACRO_import. */
24460 dwarf_decode_macro_bytes (struct dwarf2_cu
*cu
,
24462 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24463 struct macro_source_file
*current_file
,
24464 struct line_header
*lh
,
24465 struct dwarf2_section_info
*section
,
24466 int section_is_gnu
, int section_is_dwz
,
24467 unsigned int offset_size
,
24468 htab_t include_hash
)
24470 struct dwarf2_per_objfile
*dwarf2_per_objfile
24471 = cu
->per_cu
->dwarf2_per_objfile
;
24472 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24473 enum dwarf_macro_record_type macinfo_type
;
24474 int at_commandline
;
24475 const gdb_byte
*opcode_definitions
[256];
24477 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24478 &offset_size
, section_is_gnu
);
24479 if (mac_ptr
== NULL
)
24481 /* We already issued a complaint. */
24485 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24486 GDB is still reading the definitions from command line. First
24487 DW_MACINFO_start_file will need to be ignored as it was already executed
24488 to create CURRENT_FILE for the main source holding also the command line
24489 definitions. On first met DW_MACINFO_start_file this flag is reset to
24490 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24492 at_commandline
= 1;
24496 /* Do we at least have room for a macinfo type byte? */
24497 if (mac_ptr
>= mac_end
)
24499 dwarf2_section_buffer_overflow_complaint (section
);
24503 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24506 /* Note that we rely on the fact that the corresponding GNU and
24507 DWARF constants are the same. */
24509 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24510 switch (macinfo_type
)
24512 /* A zero macinfo type indicates the end of the macro
24517 case DW_MACRO_define
:
24518 case DW_MACRO_undef
:
24519 case DW_MACRO_define_strp
:
24520 case DW_MACRO_undef_strp
:
24521 case DW_MACRO_define_sup
:
24522 case DW_MACRO_undef_sup
:
24524 unsigned int bytes_read
;
24529 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24530 mac_ptr
+= bytes_read
;
24532 if (macinfo_type
== DW_MACRO_define
24533 || macinfo_type
== DW_MACRO_undef
)
24535 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24536 mac_ptr
+= bytes_read
;
24540 LONGEST str_offset
;
24542 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24543 mac_ptr
+= offset_size
;
24545 if (macinfo_type
== DW_MACRO_define_sup
24546 || macinfo_type
== DW_MACRO_undef_sup
24549 struct dwz_file
*dwz
24550 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24552 body
= read_indirect_string_from_dwz (objfile
,
24556 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24560 is_define
= (macinfo_type
== DW_MACRO_define
24561 || macinfo_type
== DW_MACRO_define_strp
24562 || macinfo_type
== DW_MACRO_define_sup
);
24563 if (! current_file
)
24565 /* DWARF violation as no main source is present. */
24566 complaint (_("debug info with no main source gives macro %s "
24568 is_define
? _("definition") : _("undefinition"),
24572 if ((line
== 0 && !at_commandline
)
24573 || (line
!= 0 && at_commandline
))
24574 complaint (_("debug info gives %s macro %s with %s line %d: %s"),
24575 at_commandline
? _("command-line") : _("in-file"),
24576 is_define
? _("definition") : _("undefinition"),
24577 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24581 /* Fedora's rpm-build's "debugedit" binary
24582 corrupted .debug_macro sections.
24585 https://bugzilla.redhat.com/show_bug.cgi?id=1708786 */
24586 complaint (_("debug info gives %s invalid macro %s "
24587 "without body (corrupted?) at line %d "
24589 at_commandline
? _("command-line") : _("in-file"),
24590 is_define
? _("definition") : _("undefinition"),
24591 line
, current_file
->filename
);
24593 else if (is_define
)
24594 parse_macro_definition (current_file
, line
, body
);
24597 gdb_assert (macinfo_type
== DW_MACRO_undef
24598 || macinfo_type
== DW_MACRO_undef_strp
24599 || macinfo_type
== DW_MACRO_undef_sup
);
24600 macro_undef (current_file
, line
, body
);
24605 case DW_MACRO_start_file
:
24607 unsigned int bytes_read
;
24610 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24611 mac_ptr
+= bytes_read
;
24612 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24613 mac_ptr
+= bytes_read
;
24615 if ((line
== 0 && !at_commandline
)
24616 || (line
!= 0 && at_commandline
))
24617 complaint (_("debug info gives source %d included "
24618 "from %s at %s line %d"),
24619 file
, at_commandline
? _("command-line") : _("file"),
24620 line
== 0 ? _("zero") : _("non-zero"), line
);
24622 if (at_commandline
)
24624 /* This DW_MACRO_start_file was executed in the
24626 at_commandline
= 0;
24629 current_file
= macro_start_file (cu
, file
, line
, current_file
,
24634 case DW_MACRO_end_file
:
24635 if (! current_file
)
24636 complaint (_("macro debug info has an unmatched "
24637 "`close_file' directive"));
24640 current_file
= current_file
->included_by
;
24641 if (! current_file
)
24643 enum dwarf_macro_record_type next_type
;
24645 /* GCC circa March 2002 doesn't produce the zero
24646 type byte marking the end of the compilation
24647 unit. Complain if it's not there, but exit no
24650 /* Do we at least have room for a macinfo type byte? */
24651 if (mac_ptr
>= mac_end
)
24653 dwarf2_section_buffer_overflow_complaint (section
);
24657 /* We don't increment mac_ptr here, so this is just
24660 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24662 if (next_type
!= 0)
24663 complaint (_("no terminating 0-type entry for "
24664 "macros in `.debug_macinfo' section"));
24671 case DW_MACRO_import
:
24672 case DW_MACRO_import_sup
:
24676 bfd
*include_bfd
= abfd
;
24677 struct dwarf2_section_info
*include_section
= section
;
24678 const gdb_byte
*include_mac_end
= mac_end
;
24679 int is_dwz
= section_is_dwz
;
24680 const gdb_byte
*new_mac_ptr
;
24682 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24683 mac_ptr
+= offset_size
;
24685 if (macinfo_type
== DW_MACRO_import_sup
)
24687 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24689 dwarf2_read_section (objfile
, &dwz
->macro
);
24691 include_section
= &dwz
->macro
;
24692 include_bfd
= get_section_bfd_owner (include_section
);
24693 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24697 new_mac_ptr
= include_section
->buffer
+ offset
;
24698 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24702 /* This has actually happened; see
24703 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24704 complaint (_("recursive DW_MACRO_import in "
24705 ".debug_macro section"));
24709 *slot
= (void *) new_mac_ptr
;
24711 dwarf_decode_macro_bytes (cu
, include_bfd
, new_mac_ptr
,
24712 include_mac_end
, current_file
, lh
,
24713 section
, section_is_gnu
, is_dwz
,
24714 offset_size
, include_hash
);
24716 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24721 case DW_MACINFO_vendor_ext
:
24722 if (!section_is_gnu
)
24724 unsigned int bytes_read
;
24726 /* This reads the constant, but since we don't recognize
24727 any vendor extensions, we ignore it. */
24728 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24729 mac_ptr
+= bytes_read
;
24730 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24731 mac_ptr
+= bytes_read
;
24733 /* We don't recognize any vendor extensions. */
24739 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24740 mac_ptr
, mac_end
, abfd
, offset_size
,
24742 if (mac_ptr
== NULL
)
24747 } while (macinfo_type
!= 0);
24751 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24752 int section_is_gnu
)
24754 struct dwarf2_per_objfile
*dwarf2_per_objfile
24755 = cu
->per_cu
->dwarf2_per_objfile
;
24756 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24757 struct line_header
*lh
= cu
->line_header
;
24759 const gdb_byte
*mac_ptr
, *mac_end
;
24760 struct macro_source_file
*current_file
= 0;
24761 enum dwarf_macro_record_type macinfo_type
;
24762 unsigned int offset_size
= cu
->header
.offset_size
;
24763 const gdb_byte
*opcode_definitions
[256];
24765 struct dwarf2_section_info
*section
;
24766 const char *section_name
;
24768 if (cu
->dwo_unit
!= NULL
)
24770 if (section_is_gnu
)
24772 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24773 section_name
= ".debug_macro.dwo";
24777 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24778 section_name
= ".debug_macinfo.dwo";
24783 if (section_is_gnu
)
24785 section
= &dwarf2_per_objfile
->macro
;
24786 section_name
= ".debug_macro";
24790 section
= &dwarf2_per_objfile
->macinfo
;
24791 section_name
= ".debug_macinfo";
24795 dwarf2_read_section (objfile
, section
);
24796 if (section
->buffer
== NULL
)
24798 complaint (_("missing %s section"), section_name
);
24801 abfd
= get_section_bfd_owner (section
);
24803 /* First pass: Find the name of the base filename.
24804 This filename is needed in order to process all macros whose definition
24805 (or undefinition) comes from the command line. These macros are defined
24806 before the first DW_MACINFO_start_file entry, and yet still need to be
24807 associated to the base file.
24809 To determine the base file name, we scan the macro definitions until we
24810 reach the first DW_MACINFO_start_file entry. We then initialize
24811 CURRENT_FILE accordingly so that any macro definition found before the
24812 first DW_MACINFO_start_file can still be associated to the base file. */
24814 mac_ptr
= section
->buffer
+ offset
;
24815 mac_end
= section
->buffer
+ section
->size
;
24817 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24818 &offset_size
, section_is_gnu
);
24819 if (mac_ptr
== NULL
)
24821 /* We already issued a complaint. */
24827 /* Do we at least have room for a macinfo type byte? */
24828 if (mac_ptr
>= mac_end
)
24830 /* Complaint is printed during the second pass as GDB will probably
24831 stop the first pass earlier upon finding
24832 DW_MACINFO_start_file. */
24836 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24839 /* Note that we rely on the fact that the corresponding GNU and
24840 DWARF constants are the same. */
24842 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24843 switch (macinfo_type
)
24845 /* A zero macinfo type indicates the end of the macro
24850 case DW_MACRO_define
:
24851 case DW_MACRO_undef
:
24852 /* Only skip the data by MAC_PTR. */
24854 unsigned int bytes_read
;
24856 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24857 mac_ptr
+= bytes_read
;
24858 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24859 mac_ptr
+= bytes_read
;
24863 case DW_MACRO_start_file
:
24865 unsigned int bytes_read
;
24868 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24869 mac_ptr
+= bytes_read
;
24870 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24871 mac_ptr
+= bytes_read
;
24873 current_file
= macro_start_file (cu
, file
, line
, current_file
, lh
);
24877 case DW_MACRO_end_file
:
24878 /* No data to skip by MAC_PTR. */
24881 case DW_MACRO_define_strp
:
24882 case DW_MACRO_undef_strp
:
24883 case DW_MACRO_define_sup
:
24884 case DW_MACRO_undef_sup
:
24886 unsigned int bytes_read
;
24888 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24889 mac_ptr
+= bytes_read
;
24890 mac_ptr
+= offset_size
;
24894 case DW_MACRO_import
:
24895 case DW_MACRO_import_sup
:
24896 /* Note that, according to the spec, a transparent include
24897 chain cannot call DW_MACRO_start_file. So, we can just
24898 skip this opcode. */
24899 mac_ptr
+= offset_size
;
24902 case DW_MACINFO_vendor_ext
:
24903 /* Only skip the data by MAC_PTR. */
24904 if (!section_is_gnu
)
24906 unsigned int bytes_read
;
24908 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24909 mac_ptr
+= bytes_read
;
24910 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24911 mac_ptr
+= bytes_read
;
24916 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24917 mac_ptr
, mac_end
, abfd
, offset_size
,
24919 if (mac_ptr
== NULL
)
24924 } while (macinfo_type
!= 0 && current_file
== NULL
);
24926 /* Second pass: Process all entries.
24928 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24929 command-line macro definitions/undefinitions. This flag is unset when we
24930 reach the first DW_MACINFO_start_file entry. */
24932 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24934 NULL
, xcalloc
, xfree
));
24935 mac_ptr
= section
->buffer
+ offset
;
24936 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24937 *slot
= (void *) mac_ptr
;
24938 dwarf_decode_macro_bytes (cu
, abfd
, mac_ptr
, mac_end
,
24939 current_file
, lh
, section
,
24940 section_is_gnu
, 0, offset_size
,
24941 include_hash
.get ());
24944 /* Check if the attribute's form is a DW_FORM_block*
24945 if so return true else false. */
24948 attr_form_is_block (const struct attribute
*attr
)
24950 return (attr
== NULL
? 0 :
24951 attr
->form
== DW_FORM_block1
24952 || attr
->form
== DW_FORM_block2
24953 || attr
->form
== DW_FORM_block4
24954 || attr
->form
== DW_FORM_block
24955 || attr
->form
== DW_FORM_exprloc
);
24958 /* Return non-zero if ATTR's value is a section offset --- classes
24959 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
24960 You may use DW_UNSND (attr) to retrieve such offsets.
24962 Section 7.5.4, "Attribute Encodings", explains that no attribute
24963 may have a value that belongs to more than one of these classes; it
24964 would be ambiguous if we did, because we use the same forms for all
24968 attr_form_is_section_offset (const struct attribute
*attr
)
24970 return (attr
->form
== DW_FORM_data4
24971 || attr
->form
== DW_FORM_data8
24972 || attr
->form
== DW_FORM_sec_offset
);
24975 /* Return non-zero if ATTR's value falls in the 'constant' class, or
24976 zero otherwise. When this function returns true, you can apply
24977 dwarf2_get_attr_constant_value to it.
24979 However, note that for some attributes you must check
24980 attr_form_is_section_offset before using this test. DW_FORM_data4
24981 and DW_FORM_data8 are members of both the constant class, and of
24982 the classes that contain offsets into other debug sections
24983 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
24984 that, if an attribute's can be either a constant or one of the
24985 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
24986 taken as section offsets, not constants.
24988 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
24989 cannot handle that. */
24992 attr_form_is_constant (const struct attribute
*attr
)
24994 switch (attr
->form
)
24996 case DW_FORM_sdata
:
24997 case DW_FORM_udata
:
24998 case DW_FORM_data1
:
24999 case DW_FORM_data2
:
25000 case DW_FORM_data4
:
25001 case DW_FORM_data8
:
25002 case DW_FORM_implicit_const
:
25010 /* DW_ADDR is always stored already as sect_offset; despite for the forms
25011 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
25014 attr_form_is_ref (const struct attribute
*attr
)
25016 switch (attr
->form
)
25018 case DW_FORM_ref_addr
:
25023 case DW_FORM_ref_udata
:
25024 case DW_FORM_GNU_ref_alt
:
25031 /* Return the .debug_loc section to use for CU.
25032 For DWO files use .debug_loc.dwo. */
25034 static struct dwarf2_section_info
*
25035 cu_debug_loc_section (struct dwarf2_cu
*cu
)
25037 struct dwarf2_per_objfile
*dwarf2_per_objfile
25038 = cu
->per_cu
->dwarf2_per_objfile
;
25042 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
25044 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
25046 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
25047 : &dwarf2_per_objfile
->loc
);
25050 /* A helper function that fills in a dwarf2_loclist_baton. */
25053 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
25054 struct dwarf2_loclist_baton
*baton
,
25055 const struct attribute
*attr
)
25057 struct dwarf2_per_objfile
*dwarf2_per_objfile
25058 = cu
->per_cu
->dwarf2_per_objfile
;
25059 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
25061 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
25063 baton
->per_cu
= cu
->per_cu
;
25064 gdb_assert (baton
->per_cu
);
25065 /* We don't know how long the location list is, but make sure we
25066 don't run off the edge of the section. */
25067 baton
->size
= section
->size
- DW_UNSND (attr
);
25068 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
25069 baton
->base_address
= cu
->base_address
;
25070 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
25074 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
25075 struct dwarf2_cu
*cu
, int is_block
)
25077 struct dwarf2_per_objfile
*dwarf2_per_objfile
25078 = cu
->per_cu
->dwarf2_per_objfile
;
25079 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25080 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
25082 if (attr_form_is_section_offset (attr
)
25083 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
25084 the section. If so, fall through to the complaint in the
25086 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
25088 struct dwarf2_loclist_baton
*baton
;
25090 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
25092 fill_in_loclist_baton (cu
, baton
, attr
);
25094 if (cu
->base_known
== 0)
25095 complaint (_("Location list used without "
25096 "specifying the CU base address."));
25098 SYMBOL_ACLASS_INDEX (sym
) = (is_block
25099 ? dwarf2_loclist_block_index
25100 : dwarf2_loclist_index
);
25101 SYMBOL_LOCATION_BATON (sym
) = baton
;
25105 struct dwarf2_locexpr_baton
*baton
;
25107 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
25108 baton
->per_cu
= cu
->per_cu
;
25109 gdb_assert (baton
->per_cu
);
25111 if (attr_form_is_block (attr
))
25113 /* Note that we're just copying the block's data pointer
25114 here, not the actual data. We're still pointing into the
25115 info_buffer for SYM's objfile; right now we never release
25116 that buffer, but when we do clean up properly this may
25118 baton
->size
= DW_BLOCK (attr
)->size
;
25119 baton
->data
= DW_BLOCK (attr
)->data
;
25123 dwarf2_invalid_attrib_class_complaint ("location description",
25124 SYMBOL_NATURAL_NAME (sym
));
25128 SYMBOL_ACLASS_INDEX (sym
) = (is_block
25129 ? dwarf2_locexpr_block_index
25130 : dwarf2_locexpr_index
);
25131 SYMBOL_LOCATION_BATON (sym
) = baton
;
25135 /* Return the OBJFILE associated with the compilation unit CU. If CU
25136 came from a separate debuginfo file, then the master objfile is
25140 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
25142 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25144 /* Return the master objfile, so that we can report and look up the
25145 correct file containing this variable. */
25146 if (objfile
->separate_debug_objfile_backlink
)
25147 objfile
= objfile
->separate_debug_objfile_backlink
;
25152 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
25153 (CU_HEADERP is unused in such case) or prepare a temporary copy at
25154 CU_HEADERP first. */
25156 static const struct comp_unit_head
*
25157 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
25158 struct dwarf2_per_cu_data
*per_cu
)
25160 const gdb_byte
*info_ptr
;
25163 return &per_cu
->cu
->header
;
25165 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
25167 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
25168 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
25169 rcuh_kind::COMPILE
);
25174 /* Return the address size given in the compilation unit header for CU. */
25177 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
25179 struct comp_unit_head cu_header_local
;
25180 const struct comp_unit_head
*cu_headerp
;
25182 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25184 return cu_headerp
->addr_size
;
25187 /* Return the offset size given in the compilation unit header for CU. */
25190 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
25192 struct comp_unit_head cu_header_local
;
25193 const struct comp_unit_head
*cu_headerp
;
25195 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25197 return cu_headerp
->offset_size
;
25200 /* See its dwarf2loc.h declaration. */
25203 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
25205 struct comp_unit_head cu_header_local
;
25206 const struct comp_unit_head
*cu_headerp
;
25208 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25210 if (cu_headerp
->version
== 2)
25211 return cu_headerp
->addr_size
;
25213 return cu_headerp
->offset_size
;
25216 /* Return the text offset of the CU. The returned offset comes from
25217 this CU's objfile. If this objfile came from a separate debuginfo
25218 file, then the offset may be different from the corresponding
25219 offset in the parent objfile. */
25222 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
25224 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25226 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
25229 /* Return DWARF version number of PER_CU. */
25232 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
25234 return per_cu
->dwarf_version
;
25237 /* Locate the .debug_info compilation unit from CU's objfile which contains
25238 the DIE at OFFSET. Raises an error on failure. */
25240 static struct dwarf2_per_cu_data
*
25241 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
25242 unsigned int offset_in_dwz
,
25243 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25245 struct dwarf2_per_cu_data
*this_cu
;
25249 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
25252 struct dwarf2_per_cu_data
*mid_cu
;
25253 int mid
= low
+ (high
- low
) / 2;
25255 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
25256 if (mid_cu
->is_dwz
> offset_in_dwz
25257 || (mid_cu
->is_dwz
== offset_in_dwz
25258 && mid_cu
->sect_off
+ mid_cu
->length
>= sect_off
))
25263 gdb_assert (low
== high
);
25264 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25265 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
25267 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
25268 error (_("Dwarf Error: could not find partial DIE containing "
25269 "offset %s [in module %s]"),
25270 sect_offset_str (sect_off
),
25271 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
25273 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
25275 return dwarf2_per_objfile
->all_comp_units
[low
-1];
25279 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
25280 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
25281 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
25282 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
25287 /* Initialize dwarf2_cu CU, owned by PER_CU. */
25289 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
25290 : per_cu (per_cu_
),
25292 has_loclist (false),
25293 checked_producer (false),
25294 producer_is_gxx_lt_4_6 (false),
25295 producer_is_gcc_lt_4_3 (false),
25296 producer_is_icc (false),
25297 producer_is_icc_lt_14 (false),
25298 producer_is_codewarrior (false),
25299 processing_has_namespace_info (false)
25304 /* Destroy a dwarf2_cu. */
25306 dwarf2_cu::~dwarf2_cu ()
25311 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
25314 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
25315 enum language pretend_language
)
25317 struct attribute
*attr
;
25319 /* Set the language we're debugging. */
25320 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
25322 set_cu_language (DW_UNSND (attr
), cu
);
25325 cu
->language
= pretend_language
;
25326 cu
->language_defn
= language_def (cu
->language
);
25329 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25332 /* Increase the age counter on each cached compilation unit, and free
25333 any that are too old. */
25336 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25338 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25340 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25341 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25342 while (per_cu
!= NULL
)
25344 per_cu
->cu
->last_used
++;
25345 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25346 dwarf2_mark (per_cu
->cu
);
25347 per_cu
= per_cu
->cu
->read_in_chain
;
25350 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25351 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25352 while (per_cu
!= NULL
)
25354 struct dwarf2_per_cu_data
*next_cu
;
25356 next_cu
= per_cu
->cu
->read_in_chain
;
25358 if (!per_cu
->cu
->mark
)
25361 *last_chain
= next_cu
;
25364 last_chain
= &per_cu
->cu
->read_in_chain
;
25370 /* Remove a single compilation unit from the cache. */
25373 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25375 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25376 struct dwarf2_per_objfile
*dwarf2_per_objfile
25377 = target_per_cu
->dwarf2_per_objfile
;
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
== target_per_cu
)
25391 *last_chain
= next_cu
;
25395 last_chain
= &per_cu
->cu
->read_in_chain
;
25401 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25402 We store these in a hash table separate from the DIEs, and preserve them
25403 when the DIEs are flushed out of cache.
25405 The CU "per_cu" pointer is needed because offset alone is not enough to
25406 uniquely identify the type. A file may have multiple .debug_types sections,
25407 or the type may come from a DWO file. Furthermore, while it's more logical
25408 to use per_cu->section+offset, with Fission the section with the data is in
25409 the DWO file but we don't know that section at the point we need it.
25410 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25411 because we can enter the lookup routine, get_die_type_at_offset, from
25412 outside this file, and thus won't necessarily have PER_CU->cu.
25413 Fortunately, PER_CU is stable for the life of the objfile. */
25415 struct dwarf2_per_cu_offset_and_type
25417 const struct dwarf2_per_cu_data
*per_cu
;
25418 sect_offset sect_off
;
25422 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25425 per_cu_offset_and_type_hash (const void *item
)
25427 const struct dwarf2_per_cu_offset_and_type
*ofs
25428 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25430 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25433 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25436 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25438 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25439 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25440 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25441 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25443 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25444 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25447 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25448 table if necessary. For convenience, return TYPE.
25450 The DIEs reading must have careful ordering to:
25451 * Not cause infite loops trying to read in DIEs as a prerequisite for
25452 reading current DIE.
25453 * Not trying to dereference contents of still incompletely read in types
25454 while reading in other DIEs.
25455 * Enable referencing still incompletely read in types just by a pointer to
25456 the type without accessing its fields.
25458 Therefore caller should follow these rules:
25459 * Try to fetch any prerequisite types we may need to build this DIE type
25460 before building the type and calling set_die_type.
25461 * After building type call set_die_type for current DIE as soon as
25462 possible before fetching more types to complete the current type.
25463 * Make the type as complete as possible before fetching more types. */
25465 static struct type
*
25466 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25468 struct dwarf2_per_objfile
*dwarf2_per_objfile
25469 = cu
->per_cu
->dwarf2_per_objfile
;
25470 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25471 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25472 struct attribute
*attr
;
25473 struct dynamic_prop prop
;
25475 /* For Ada types, make sure that the gnat-specific data is always
25476 initialized (if not already set). There are a few types where
25477 we should not be doing so, because the type-specific area is
25478 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25479 where the type-specific area is used to store the floatformat).
25480 But this is not a problem, because the gnat-specific information
25481 is actually not needed for these types. */
25482 if (need_gnat_info (cu
)
25483 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25484 && TYPE_CODE (type
) != TYPE_CODE_FLT
25485 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25486 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25487 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25488 && !HAVE_GNAT_AUX_INFO (type
))
25489 INIT_GNAT_SPECIFIC (type
);
25491 /* Read DW_AT_allocated and set in type. */
25492 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25493 if (attr_form_is_block (attr
))
25495 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25496 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25498 else if (attr
!= NULL
)
25500 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25501 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25502 sect_offset_str (die
->sect_off
));
25505 /* Read DW_AT_associated and set in type. */
25506 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25507 if (attr_form_is_block (attr
))
25509 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25510 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25512 else if (attr
!= NULL
)
25514 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
25515 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25516 sect_offset_str (die
->sect_off
));
25519 /* Read DW_AT_data_location and set in type. */
25520 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25521 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25522 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25524 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25526 dwarf2_per_objfile
->die_type_hash
=
25527 htab_create_alloc_ex (127,
25528 per_cu_offset_and_type_hash
,
25529 per_cu_offset_and_type_eq
,
25531 &objfile
->objfile_obstack
,
25532 hashtab_obstack_allocate
,
25533 dummy_obstack_deallocate
);
25536 ofs
.per_cu
= cu
->per_cu
;
25537 ofs
.sect_off
= die
->sect_off
;
25539 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25540 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25542 complaint (_("A problem internal to GDB: DIE %s has type already set"),
25543 sect_offset_str (die
->sect_off
));
25544 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25545 struct dwarf2_per_cu_offset_and_type
);
25550 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25551 or return NULL if the die does not have a saved type. */
25553 static struct type
*
25554 get_die_type_at_offset (sect_offset sect_off
,
25555 struct dwarf2_per_cu_data
*per_cu
)
25557 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25558 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25560 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25563 ofs
.per_cu
= per_cu
;
25564 ofs
.sect_off
= sect_off
;
25565 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25566 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25573 /* Look up the type for DIE in CU in die_type_hash,
25574 or return NULL if DIE does not have a saved type. */
25576 static struct type
*
25577 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25579 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25582 /* Add a dependence relationship from CU to REF_PER_CU. */
25585 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25586 struct dwarf2_per_cu_data
*ref_per_cu
)
25590 if (cu
->dependencies
== NULL
)
25592 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25593 NULL
, &cu
->comp_unit_obstack
,
25594 hashtab_obstack_allocate
,
25595 dummy_obstack_deallocate
);
25597 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25599 *slot
= ref_per_cu
;
25602 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25603 Set the mark field in every compilation unit in the
25604 cache that we must keep because we are keeping CU. */
25607 dwarf2_mark_helper (void **slot
, void *data
)
25609 struct dwarf2_per_cu_data
*per_cu
;
25611 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25613 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25614 reading of the chain. As such dependencies remain valid it is not much
25615 useful to track and undo them during QUIT cleanups. */
25616 if (per_cu
->cu
== NULL
)
25619 if (per_cu
->cu
->mark
)
25621 per_cu
->cu
->mark
= true;
25623 if (per_cu
->cu
->dependencies
!= NULL
)
25624 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25629 /* Set the mark field in CU and in every other compilation unit in the
25630 cache that we must keep because we are keeping CU. */
25633 dwarf2_mark (struct dwarf2_cu
*cu
)
25638 if (cu
->dependencies
!= NULL
)
25639 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25643 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25647 per_cu
->cu
->mark
= false;
25648 per_cu
= per_cu
->cu
->read_in_chain
;
25652 /* Trivial hash function for partial_die_info: the hash value of a DIE
25653 is its offset in .debug_info for this objfile. */
25656 partial_die_hash (const void *item
)
25658 const struct partial_die_info
*part_die
25659 = (const struct partial_die_info
*) item
;
25661 return to_underlying (part_die
->sect_off
);
25664 /* Trivial comparison function for partial_die_info structures: two DIEs
25665 are equal if they have the same offset. */
25668 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25670 const struct partial_die_info
*part_die_lhs
25671 = (const struct partial_die_info
*) item_lhs
;
25672 const struct partial_die_info
*part_die_rhs
25673 = (const struct partial_die_info
*) item_rhs
;
25675 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25678 struct cmd_list_element
*set_dwarf_cmdlist
;
25679 struct cmd_list_element
*show_dwarf_cmdlist
;
25682 set_dwarf_cmd (const char *args
, int from_tty
)
25684 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25689 show_dwarf_cmd (const char *args
, int from_tty
)
25691 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25694 int dwarf_always_disassemble
;
25697 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25698 struct cmd_list_element
*c
, const char *value
)
25700 fprintf_filtered (file
,
25701 _("Whether to always disassemble "
25702 "DWARF expressions is %s.\n"),
25707 show_check_physname (struct ui_file
*file
, int from_tty
,
25708 struct cmd_list_element
*c
, const char *value
)
25710 fprintf_filtered (file
,
25711 _("Whether to check \"physname\" is %s.\n"),
25716 _initialize_dwarf2_read (void)
25718 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25719 Set DWARF specific variables.\n\
25720 Configure DWARF variables such as the cache size"),
25721 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25722 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25724 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25725 Show DWARF specific variables\n\
25726 Show DWARF variables such as the cache size"),
25727 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25728 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25730 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25731 &dwarf_max_cache_age
, _("\
25732 Set the upper bound on the age of cached DWARF compilation units."), _("\
25733 Show the upper bound on the age of cached DWARF compilation units."), _("\
25734 A higher limit means that cached compilation units will be stored\n\
25735 in memory longer, and more total memory will be used. Zero disables\n\
25736 caching, which can slow down startup."),
25738 show_dwarf_max_cache_age
,
25739 &set_dwarf_cmdlist
,
25740 &show_dwarf_cmdlist
);
25742 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25743 &dwarf_always_disassemble
, _("\
25744 Set whether `info address' always disassembles DWARF expressions."), _("\
25745 Show whether `info address' always disassembles DWARF expressions."), _("\
25746 When enabled, DWARF expressions are always printed in an assembly-like\n\
25747 syntax. When disabled, expressions will be printed in a more\n\
25748 conversational style, when possible."),
25750 show_dwarf_always_disassemble
,
25751 &set_dwarf_cmdlist
,
25752 &show_dwarf_cmdlist
);
25754 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25755 Set debugging of the DWARF reader."), _("\
25756 Show debugging of the DWARF reader."), _("\
25757 When enabled (non-zero), debugging messages are printed during DWARF\n\
25758 reading and symtab expansion. A value of 1 (one) provides basic\n\
25759 information. A value greater than 1 provides more verbose information."),
25762 &setdebuglist
, &showdebuglist
);
25764 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25765 Set debugging of the DWARF DIE reader."), _("\
25766 Show debugging of the DWARF DIE reader."), _("\
25767 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25768 The value is the maximum depth to print."),
25771 &setdebuglist
, &showdebuglist
);
25773 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25774 Set debugging of the dwarf line reader."), _("\
25775 Show debugging of the dwarf line reader."), _("\
25776 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25777 A value of 1 (one) provides basic information.\n\
25778 A value greater than 1 provides more verbose information."),
25781 &setdebuglist
, &showdebuglist
);
25783 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25784 Set cross-checking of \"physname\" code against demangler."), _("\
25785 Show cross-checking of \"physname\" code against demangler."), _("\
25786 When enabled, GDB's internal \"physname\" code is checked against\n\
25788 NULL
, show_check_physname
,
25789 &setdebuglist
, &showdebuglist
);
25791 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25792 no_class
, &use_deprecated_index_sections
, _("\
25793 Set whether to use deprecated gdb_index sections."), _("\
25794 Show whether to use deprecated gdb_index sections."), _("\
25795 When enabled, deprecated .gdb_index sections are used anyway.\n\
25796 Normally they are ignored either because of a missing feature or\n\
25797 performance issue.\n\
25798 Warning: This option must be enabled before gdb reads the file."),
25801 &setlist
, &showlist
);
25803 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25804 &dwarf2_locexpr_funcs
);
25805 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25806 &dwarf2_loclist_funcs
);
25808 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25809 &dwarf2_block_frame_base_locexpr_funcs
);
25810 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25811 &dwarf2_block_frame_base_loclist_funcs
);
25814 selftests::register_test ("dw2_expand_symtabs_matching",
25815 selftests::dw2_expand_symtabs_matching::run_test
);