1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2019 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
32 #include "dwarf2read.h"
33 #include "dwarf-index-cache.h"
34 #include "dwarf-index-common.h"
43 #include "gdb-demangle.h"
44 #include "expression.h"
45 #include "filenames.h" /* for DOSish file names */
48 #include "complaints.h"
49 #include "dwarf2expr.h"
50 #include "dwarf2loc.h"
51 #include "cp-support.h"
57 #include "typeprint.h"
60 #include "completer.h"
61 #include "common/vec.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
71 #include "common/filestuff.h"
73 #include "namespace.h"
74 #include "common/gdb_unlinker.h"
75 #include "common/function-view.h"
76 #include "common/gdb_optional.h"
77 #include "common/underlying.h"
78 #include "common/byte-vector.h"
79 #include "common/hash_enum.h"
80 #include "filename-seen-cache.h"
83 #include <sys/types.h>
85 #include <unordered_set>
86 #include <unordered_map>
87 #include "common/selftest.h"
90 #include <forward_list>
91 #include "rust-lang.h"
92 #include "common/pathstuff.h"
94 /* When == 1, print basic high level tracing messages.
95 When > 1, be more verbose.
96 This is in contrast to the low level DIE reading of dwarf_die_debug. */
97 static unsigned int dwarf_read_debug
= 0;
99 /* When non-zero, dump DIEs after they are read in. */
100 static unsigned int dwarf_die_debug
= 0;
102 /* When non-zero, dump line number entries as they are read in. */
103 static unsigned int dwarf_line_debug
= 0;
105 /* When non-zero, cross-check physname against demangler. */
106 static int check_physname
= 0;
108 /* When non-zero, do not reject deprecated .gdb_index sections. */
109 static int use_deprecated_index_sections
= 0;
111 static const struct objfile_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
113 /* The "aclass" indices for various kinds of computed DWARF symbols. */
115 static int dwarf2_locexpr_index
;
116 static int dwarf2_loclist_index
;
117 static int dwarf2_locexpr_block_index
;
118 static int dwarf2_loclist_block_index
;
120 /* An index into a (C++) symbol name component in a symbol name as
121 recorded in the mapped_index's symbol table. For each C++ symbol
122 in the symbol table, we record one entry for the start of each
123 component in the symbol in a table of name components, and then
124 sort the table, in order to be able to binary search symbol names,
125 ignoring leading namespaces, both completion and regular look up.
126 For example, for symbol "A::B::C", we'll have an entry that points
127 to "A::B::C", another that points to "B::C", and another for "C".
128 Note that function symbols in GDB index have no parameter
129 information, just the function/method names. You can convert a
130 name_component to a "const char *" using the
131 'mapped_index::symbol_name_at(offset_type)' method. */
133 struct name_component
135 /* Offset in the symbol name where the component starts. Stored as
136 a (32-bit) offset instead of a pointer to save memory and improve
137 locality on 64-bit architectures. */
138 offset_type name_offset
;
140 /* The symbol's index in the symbol and constant pool tables of a
145 /* Base class containing bits shared by both .gdb_index and
146 .debug_name indexes. */
148 struct mapped_index_base
150 mapped_index_base () = default;
151 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
153 /* The name_component table (a sorted vector). See name_component's
154 description above. */
155 std::vector
<name_component
> name_components
;
157 /* How NAME_COMPONENTS is sorted. */
158 enum case_sensitivity name_components_casing
;
160 /* Return the number of names in the symbol table. */
161 virtual size_t symbol_name_count () const = 0;
163 /* Get the name of the symbol at IDX in the symbol table. */
164 virtual const char *symbol_name_at (offset_type idx
) const = 0;
166 /* Return whether the name at IDX in the symbol table should be
168 virtual bool symbol_name_slot_invalid (offset_type idx
) const
173 /* Build the symbol name component sorted vector, if we haven't
175 void build_name_components ();
177 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
178 possible matches for LN_NO_PARAMS in the name component
180 std::pair
<std::vector
<name_component
>::const_iterator
,
181 std::vector
<name_component
>::const_iterator
>
182 find_name_components_bounds (const lookup_name_info
&ln_no_params
) const;
184 /* Prevent deleting/destroying via a base class pointer. */
186 ~mapped_index_base() = default;
189 /* A description of the mapped index. The file format is described in
190 a comment by the code that writes the index. */
191 struct mapped_index final
: public mapped_index_base
193 /* A slot/bucket in the symbol table hash. */
194 struct symbol_table_slot
196 const offset_type name
;
197 const offset_type vec
;
200 /* Index data format version. */
203 /* The address table data. */
204 gdb::array_view
<const gdb_byte
> address_table
;
206 /* The symbol table, implemented as a hash table. */
207 gdb::array_view
<symbol_table_slot
> symbol_table
;
209 /* A pointer to the constant pool. */
210 const char *constant_pool
= nullptr;
212 bool symbol_name_slot_invalid (offset_type idx
) const override
214 const auto &bucket
= this->symbol_table
[idx
];
215 return bucket
.name
== 0 && bucket
.vec
;
218 /* Convenience method to get at the name of the symbol at IDX in the
220 const char *symbol_name_at (offset_type idx
) const override
221 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
223 size_t symbol_name_count () const override
224 { return this->symbol_table
.size (); }
227 /* A description of the mapped .debug_names.
228 Uninitialized map has CU_COUNT 0. */
229 struct mapped_debug_names final
: public mapped_index_base
231 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
232 : dwarf2_per_objfile (dwarf2_per_objfile_
)
235 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
236 bfd_endian dwarf5_byte_order
;
237 bool dwarf5_is_dwarf64
;
238 bool augmentation_is_gdb
;
240 uint32_t cu_count
= 0;
241 uint32_t tu_count
, bucket_count
, name_count
;
242 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
243 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
244 const gdb_byte
*name_table_string_offs_reordered
;
245 const gdb_byte
*name_table_entry_offs_reordered
;
246 const gdb_byte
*entry_pool
;
253 /* Attribute name DW_IDX_*. */
256 /* Attribute form DW_FORM_*. */
259 /* Value if FORM is DW_FORM_implicit_const. */
260 LONGEST implicit_const
;
262 std::vector
<attr
> attr_vec
;
265 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
267 const char *namei_to_name (uint32_t namei
) const;
269 /* Implementation of the mapped_index_base virtual interface, for
270 the name_components cache. */
272 const char *symbol_name_at (offset_type idx
) const override
273 { return namei_to_name (idx
); }
275 size_t symbol_name_count () const override
276 { return this->name_count
; }
279 /* See dwarf2read.h. */
282 get_dwarf2_per_objfile (struct objfile
*objfile
)
284 return dwarf2_objfile_data_key
.get (objfile
);
287 /* Default names of the debugging sections. */
289 /* Note that if the debugging section has been compressed, it might
290 have a name like .zdebug_info. */
292 static const struct dwarf2_debug_sections dwarf2_elf_names
=
294 { ".debug_info", ".zdebug_info" },
295 { ".debug_abbrev", ".zdebug_abbrev" },
296 { ".debug_line", ".zdebug_line" },
297 { ".debug_loc", ".zdebug_loc" },
298 { ".debug_loclists", ".zdebug_loclists" },
299 { ".debug_macinfo", ".zdebug_macinfo" },
300 { ".debug_macro", ".zdebug_macro" },
301 { ".debug_str", ".zdebug_str" },
302 { ".debug_line_str", ".zdebug_line_str" },
303 { ".debug_ranges", ".zdebug_ranges" },
304 { ".debug_rnglists", ".zdebug_rnglists" },
305 { ".debug_types", ".zdebug_types" },
306 { ".debug_addr", ".zdebug_addr" },
307 { ".debug_frame", ".zdebug_frame" },
308 { ".eh_frame", NULL
},
309 { ".gdb_index", ".zgdb_index" },
310 { ".debug_names", ".zdebug_names" },
311 { ".debug_aranges", ".zdebug_aranges" },
315 /* List of DWO/DWP sections. */
317 static const struct dwop_section_names
319 struct dwarf2_section_names abbrev_dwo
;
320 struct dwarf2_section_names info_dwo
;
321 struct dwarf2_section_names line_dwo
;
322 struct dwarf2_section_names loc_dwo
;
323 struct dwarf2_section_names loclists_dwo
;
324 struct dwarf2_section_names macinfo_dwo
;
325 struct dwarf2_section_names macro_dwo
;
326 struct dwarf2_section_names str_dwo
;
327 struct dwarf2_section_names str_offsets_dwo
;
328 struct dwarf2_section_names types_dwo
;
329 struct dwarf2_section_names cu_index
;
330 struct dwarf2_section_names tu_index
;
334 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
335 { ".debug_info.dwo", ".zdebug_info.dwo" },
336 { ".debug_line.dwo", ".zdebug_line.dwo" },
337 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
338 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
339 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
340 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
341 { ".debug_str.dwo", ".zdebug_str.dwo" },
342 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
343 { ".debug_types.dwo", ".zdebug_types.dwo" },
344 { ".debug_cu_index", ".zdebug_cu_index" },
345 { ".debug_tu_index", ".zdebug_tu_index" },
348 /* local data types */
350 /* The data in a compilation unit header, after target2host
351 translation, looks like this. */
352 struct comp_unit_head
356 unsigned char addr_size
;
357 unsigned char signed_addr_p
;
358 sect_offset abbrev_sect_off
;
360 /* Size of file offsets; either 4 or 8. */
361 unsigned int offset_size
;
363 /* Size of the length field; either 4 or 12. */
364 unsigned int initial_length_size
;
366 enum dwarf_unit_type unit_type
;
368 /* Offset to the first byte of this compilation unit header in the
369 .debug_info section, for resolving relative reference dies. */
370 sect_offset sect_off
;
372 /* Offset to first die in this cu from the start of the cu.
373 This will be the first byte following the compilation unit header. */
374 cu_offset first_die_cu_offset
;
376 /* 64-bit signature of this type unit - it is valid only for
377 UNIT_TYPE DW_UT_type. */
380 /* For types, offset in the type's DIE of the type defined by this TU. */
381 cu_offset type_cu_offset_in_tu
;
384 /* Type used for delaying computation of method physnames.
385 See comments for compute_delayed_physnames. */
386 struct delayed_method_info
388 /* The type to which the method is attached, i.e., its parent class. */
391 /* The index of the method in the type's function fieldlists. */
394 /* The index of the method in the fieldlist. */
397 /* The name of the DIE. */
400 /* The DIE associated with this method. */
401 struct die_info
*die
;
404 /* Internal state when decoding a particular compilation unit. */
407 explicit dwarf2_cu (struct dwarf2_per_cu_data
*per_cu
);
410 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
412 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
413 Create the set of symtabs used by this TU, or if this TU is sharing
414 symtabs with another TU and the symtabs have already been created
415 then restore those symtabs in the line header.
416 We don't need the pc/line-number mapping for type units. */
417 void setup_type_unit_groups (struct die_info
*die
);
419 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
420 buildsym_compunit constructor. */
421 struct compunit_symtab
*start_symtab (const char *name
,
422 const char *comp_dir
,
425 /* Reset the builder. */
426 void reset_builder () { m_builder
.reset (); }
428 /* The header of the compilation unit. */
429 struct comp_unit_head header
{};
431 /* Base address of this compilation unit. */
432 CORE_ADDR base_address
= 0;
434 /* Non-zero if base_address has been set. */
437 /* The language we are debugging. */
438 enum language language
= language_unknown
;
439 const struct language_defn
*language_defn
= nullptr;
441 const char *producer
= nullptr;
444 /* The symtab builder for this CU. This is only non-NULL when full
445 symbols are being read. */
446 std::unique_ptr
<buildsym_compunit
> m_builder
;
449 /* The generic symbol table building routines have separate lists for
450 file scope symbols and all all other scopes (local scopes). So
451 we need to select the right one to pass to add_symbol_to_list().
452 We do it by keeping a pointer to the correct list in list_in_scope.
454 FIXME: The original dwarf code just treated the file scope as the
455 first local scope, and all other local scopes as nested local
456 scopes, and worked fine. Check to see if we really need to
457 distinguish these in buildsym.c. */
458 struct pending
**list_in_scope
= nullptr;
460 /* Hash table holding all the loaded partial DIEs
461 with partial_die->offset.SECT_OFF as hash. */
462 htab_t partial_dies
= nullptr;
464 /* Storage for things with the same lifetime as this read-in compilation
465 unit, including partial DIEs. */
466 auto_obstack comp_unit_obstack
;
468 /* When multiple dwarf2_cu structures are living in memory, this field
469 chains them all together, so that they can be released efficiently.
470 We will probably also want a generation counter so that most-recently-used
471 compilation units are cached... */
472 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
474 /* Backlink to our per_cu entry. */
475 struct dwarf2_per_cu_data
*per_cu
;
477 /* How many compilation units ago was this CU last referenced? */
480 /* A hash table of DIE cu_offset for following references with
481 die_info->offset.sect_off as hash. */
482 htab_t die_hash
= nullptr;
484 /* Full DIEs if read in. */
485 struct die_info
*dies
= nullptr;
487 /* A set of pointers to dwarf2_per_cu_data objects for compilation
488 units referenced by this one. Only set during full symbol processing;
489 partial symbol tables do not have dependencies. */
490 htab_t dependencies
= nullptr;
492 /* Header data from the line table, during full symbol processing. */
493 struct line_header
*line_header
= nullptr;
494 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
495 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
496 this is the DW_TAG_compile_unit die for this CU. We'll hold on
497 to the line header as long as this DIE is being processed. See
498 process_die_scope. */
499 die_info
*line_header_die_owner
= nullptr;
501 /* A list of methods which need to have physnames computed
502 after all type information has been read. */
503 std::vector
<delayed_method_info
> method_list
;
505 /* To be copied to symtab->call_site_htab. */
506 htab_t call_site_htab
= nullptr;
508 /* Non-NULL if this CU came from a DWO file.
509 There is an invariant here that is important to remember:
510 Except for attributes copied from the top level DIE in the "main"
511 (or "stub") file in preparation for reading the DWO file
512 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
513 Either there isn't a DWO file (in which case this is NULL and the point
514 is moot), or there is and either we're not going to read it (in which
515 case this is NULL) or there is and we are reading it (in which case this
517 struct dwo_unit
*dwo_unit
= nullptr;
519 /* The DW_AT_addr_base attribute if present, zero otherwise
520 (zero is a valid value though).
521 Note this value comes from the Fission stub CU/TU's DIE. */
522 ULONGEST addr_base
= 0;
524 /* The DW_AT_ranges_base attribute if present, zero otherwise
525 (zero is a valid value though).
526 Note this value comes from the Fission stub CU/TU's DIE.
527 Also note that the value is zero in the non-DWO case so this value can
528 be used without needing to know whether DWO files are in use or not.
529 N.B. This does not apply to DW_AT_ranges appearing in
530 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
531 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
532 DW_AT_ranges_base *would* have to be applied, and we'd have to care
533 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
534 ULONGEST ranges_base
= 0;
536 /* When reading debug info generated by older versions of rustc, we
537 have to rewrite some union types to be struct types with a
538 variant part. This rewriting must be done after the CU is fully
539 read in, because otherwise at the point of rewriting some struct
540 type might not have been fully processed. So, we keep a list of
541 all such types here and process them after expansion. */
542 std::vector
<struct type
*> rust_unions
;
544 /* Mark used when releasing cached dies. */
547 /* This CU references .debug_loc. See the symtab->locations_valid field.
548 This test is imperfect as there may exist optimized debug code not using
549 any location list and still facing inlining issues if handled as
550 unoptimized code. For a future better test see GCC PR other/32998. */
551 bool has_loclist
: 1;
553 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
554 if all the producer_is_* fields are valid. This information is cached
555 because profiling CU expansion showed excessive time spent in
556 producer_is_gxx_lt_4_6. */
557 bool checked_producer
: 1;
558 bool producer_is_gxx_lt_4_6
: 1;
559 bool producer_is_gcc_lt_4_3
: 1;
560 bool producer_is_icc
: 1;
561 bool producer_is_icc_lt_14
: 1;
562 bool producer_is_codewarrior
: 1;
564 /* When true, the file that we're processing is known to have
565 debugging info for C++ namespaces. GCC 3.3.x did not produce
566 this information, but later versions do. */
568 bool processing_has_namespace_info
: 1;
570 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
572 /* If this CU was inherited by another CU (via specification,
573 abstract_origin, etc), this is the ancestor CU. */
576 /* Get the buildsym_compunit for this CU. */
577 buildsym_compunit
*get_builder ()
579 /* If this CU has a builder associated with it, use that. */
580 if (m_builder
!= nullptr)
581 return m_builder
.get ();
583 /* Otherwise, search ancestors for a valid builder. */
584 if (ancestor
!= nullptr)
585 return ancestor
->get_builder ();
591 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
592 This includes type_unit_group and quick_file_names. */
594 struct stmt_list_hash
596 /* The DWO unit this table is from or NULL if there is none. */
597 struct dwo_unit
*dwo_unit
;
599 /* Offset in .debug_line or .debug_line.dwo. */
600 sect_offset line_sect_off
;
603 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
604 an object of this type. */
606 struct type_unit_group
608 /* dwarf2read.c's main "handle" on a TU symtab.
609 To simplify things we create an artificial CU that "includes" all the
610 type units using this stmt_list so that the rest of the code still has
611 a "per_cu" handle on the symtab.
612 This PER_CU is recognized by having no section. */
613 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
614 struct dwarf2_per_cu_data per_cu
;
616 /* The TUs that share this DW_AT_stmt_list entry.
617 This is added to while parsing type units to build partial symtabs,
618 and is deleted afterwards and not used again. */
619 VEC (sig_type_ptr
) *tus
;
621 /* The compunit symtab.
622 Type units in a group needn't all be defined in the same source file,
623 so we create an essentially anonymous symtab as the compunit symtab. */
624 struct compunit_symtab
*compunit_symtab
;
626 /* The data used to construct the hash key. */
627 struct stmt_list_hash hash
;
629 /* The number of symtabs from the line header.
630 The value here must match line_header.num_file_names. */
631 unsigned int num_symtabs
;
633 /* The symbol tables for this TU (obtained from the files listed in
635 WARNING: The order of entries here must match the order of entries
636 in the line header. After the first TU using this type_unit_group, the
637 line header for the subsequent TUs is recreated from this. This is done
638 because we need to use the same symtabs for each TU using the same
639 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
640 there's no guarantee the line header doesn't have duplicate entries. */
641 struct symtab
**symtabs
;
644 /* These sections are what may appear in a (real or virtual) DWO file. */
648 struct dwarf2_section_info abbrev
;
649 struct dwarf2_section_info line
;
650 struct dwarf2_section_info loc
;
651 struct dwarf2_section_info loclists
;
652 struct dwarf2_section_info macinfo
;
653 struct dwarf2_section_info macro
;
654 struct dwarf2_section_info str
;
655 struct dwarf2_section_info str_offsets
;
656 /* In the case of a virtual DWO file, these two are unused. */
657 struct dwarf2_section_info info
;
658 VEC (dwarf2_section_info_def
) *types
;
661 /* CUs/TUs in DWP/DWO files. */
665 /* Backlink to the containing struct dwo_file. */
666 struct dwo_file
*dwo_file
;
668 /* The "id" that distinguishes this CU/TU.
669 .debug_info calls this "dwo_id", .debug_types calls this "signature".
670 Since signatures came first, we stick with it for consistency. */
673 /* The section this CU/TU lives in, in the DWO file. */
674 struct dwarf2_section_info
*section
;
676 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
677 sect_offset sect_off
;
680 /* For types, offset in the type's DIE of the type defined by this TU. */
681 cu_offset type_offset_in_tu
;
684 /* include/dwarf2.h defines the DWP section codes.
685 It defines a max value but it doesn't define a min value, which we
686 use for error checking, so provide one. */
688 enum dwp_v2_section_ids
693 /* Data for one DWO file.
695 This includes virtual DWO files (a virtual DWO file is a DWO file as it
696 appears in a DWP file). DWP files don't really have DWO files per se -
697 comdat folding of types "loses" the DWO file they came from, and from
698 a high level view DWP files appear to contain a mass of random types.
699 However, to maintain consistency with the non-DWP case we pretend DWP
700 files contain virtual DWO files, and we assign each TU with one virtual
701 DWO file (generally based on the line and abbrev section offsets -
702 a heuristic that seems to work in practice). */
706 /* The DW_AT_GNU_dwo_name attribute.
707 For virtual DWO files the name is constructed from the section offsets
708 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
709 from related CU+TUs. */
710 const char *dwo_name
;
712 /* The DW_AT_comp_dir attribute. */
713 const char *comp_dir
;
715 /* The bfd, when the file is open. Otherwise this is NULL.
716 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
719 /* The sections that make up this DWO file.
720 Remember that for virtual DWO files in DWP V2, these are virtual
721 sections (for lack of a better name). */
722 struct dwo_sections sections
;
724 /* The CUs in the file.
725 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
726 an extension to handle LLVM's Link Time Optimization output (where
727 multiple source files may be compiled into a single object/dwo pair). */
730 /* Table of TUs in the file.
731 Each element is a struct dwo_unit. */
735 /* These sections are what may appear in a DWP file. */
739 /* These are used by both DWP version 1 and 2. */
740 struct dwarf2_section_info str
;
741 struct dwarf2_section_info cu_index
;
742 struct dwarf2_section_info tu_index
;
744 /* These are only used by DWP version 2 files.
745 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
746 sections are referenced by section number, and are not recorded here.
747 In DWP version 2 there is at most one copy of all these sections, each
748 section being (effectively) comprised of the concatenation of all of the
749 individual sections that exist in the version 1 format.
750 To keep the code simple we treat each of these concatenated pieces as a
751 section itself (a virtual section?). */
752 struct dwarf2_section_info abbrev
;
753 struct dwarf2_section_info info
;
754 struct dwarf2_section_info line
;
755 struct dwarf2_section_info loc
;
756 struct dwarf2_section_info macinfo
;
757 struct dwarf2_section_info macro
;
758 struct dwarf2_section_info str_offsets
;
759 struct dwarf2_section_info types
;
762 /* These sections are what may appear in a virtual DWO file in DWP version 1.
763 A virtual DWO file is a DWO file as it appears in a DWP file. */
765 struct virtual_v1_dwo_sections
767 struct dwarf2_section_info abbrev
;
768 struct dwarf2_section_info line
;
769 struct dwarf2_section_info loc
;
770 struct dwarf2_section_info macinfo
;
771 struct dwarf2_section_info macro
;
772 struct dwarf2_section_info str_offsets
;
773 /* Each DWP hash table entry records one CU or one TU.
774 That is recorded here, and copied to dwo_unit.section. */
775 struct dwarf2_section_info info_or_types
;
778 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
779 In version 2, the sections of the DWO files are concatenated together
780 and stored in one section of that name. Thus each ELF section contains
781 several "virtual" sections. */
783 struct virtual_v2_dwo_sections
785 bfd_size_type abbrev_offset
;
786 bfd_size_type abbrev_size
;
788 bfd_size_type line_offset
;
789 bfd_size_type line_size
;
791 bfd_size_type loc_offset
;
792 bfd_size_type loc_size
;
794 bfd_size_type macinfo_offset
;
795 bfd_size_type macinfo_size
;
797 bfd_size_type macro_offset
;
798 bfd_size_type macro_size
;
800 bfd_size_type str_offsets_offset
;
801 bfd_size_type str_offsets_size
;
803 /* Each DWP hash table entry records one CU or one TU.
804 That is recorded here, and copied to dwo_unit.section. */
805 bfd_size_type info_or_types_offset
;
806 bfd_size_type info_or_types_size
;
809 /* Contents of DWP hash tables. */
811 struct dwp_hash_table
813 uint32_t version
, nr_columns
;
814 uint32_t nr_units
, nr_slots
;
815 const gdb_byte
*hash_table
, *unit_table
;
820 const gdb_byte
*indices
;
824 /* This is indexed by column number and gives the id of the section
826 #define MAX_NR_V2_DWO_SECTIONS \
827 (1 /* .debug_info or .debug_types */ \
828 + 1 /* .debug_abbrev */ \
829 + 1 /* .debug_line */ \
830 + 1 /* .debug_loc */ \
831 + 1 /* .debug_str_offsets */ \
832 + 1 /* .debug_macro or .debug_macinfo */)
833 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
834 const gdb_byte
*offsets
;
835 const gdb_byte
*sizes
;
840 /* Data for one DWP file. */
844 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
846 dbfd (std::move (abfd
))
850 /* Name of the file. */
853 /* File format version. */
857 gdb_bfd_ref_ptr dbfd
;
859 /* Section info for this file. */
860 struct dwp_sections sections
{};
862 /* Table of CUs in the file. */
863 const struct dwp_hash_table
*cus
= nullptr;
865 /* Table of TUs in the file. */
866 const struct dwp_hash_table
*tus
= nullptr;
868 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
869 htab_t loaded_cus
{};
870 htab_t loaded_tus
{};
872 /* Table to map ELF section numbers to their sections.
873 This is only needed for the DWP V1 file format. */
874 unsigned int num_sections
= 0;
875 asection
**elf_sections
= nullptr;
878 /* This represents a '.dwz' file. */
882 dwz_file (gdb_bfd_ref_ptr
&&bfd
)
883 : dwz_bfd (std::move (bfd
))
887 /* A dwz file can only contain a few sections. */
888 struct dwarf2_section_info abbrev
{};
889 struct dwarf2_section_info info
{};
890 struct dwarf2_section_info str
{};
891 struct dwarf2_section_info line
{};
892 struct dwarf2_section_info macro
{};
893 struct dwarf2_section_info gdb_index
{};
894 struct dwarf2_section_info debug_names
{};
897 gdb_bfd_ref_ptr dwz_bfd
;
899 /* If we loaded the index from an external file, this contains the
900 resources associated to the open file, memory mapping, etc. */
901 std::unique_ptr
<index_cache_resource
> index_cache_res
;
904 /* Struct used to pass misc. parameters to read_die_and_children, et
905 al. which are used for both .debug_info and .debug_types dies.
906 All parameters here are unchanging for the life of the call. This
907 struct exists to abstract away the constant parameters of die reading. */
909 struct die_reader_specs
911 /* The bfd of die_section. */
914 /* The CU of the DIE we are parsing. */
915 struct dwarf2_cu
*cu
;
917 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
918 struct dwo_file
*dwo_file
;
920 /* The section the die comes from.
921 This is either .debug_info or .debug_types, or the .dwo variants. */
922 struct dwarf2_section_info
*die_section
;
924 /* die_section->buffer. */
925 const gdb_byte
*buffer
;
927 /* The end of the buffer. */
928 const gdb_byte
*buffer_end
;
930 /* The value of the DW_AT_comp_dir attribute. */
931 const char *comp_dir
;
933 /* The abbreviation table to use when reading the DIEs. */
934 struct abbrev_table
*abbrev_table
;
937 /* Type of function passed to init_cutu_and_read_dies, et.al. */
938 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
939 const gdb_byte
*info_ptr
,
940 struct die_info
*comp_unit_die
,
944 /* A 1-based directory index. This is a strong typedef to prevent
945 accidentally using a directory index as a 0-based index into an
947 enum class dir_index
: unsigned int {};
949 /* Likewise, a 1-based file name index. */
950 enum class file_name_index
: unsigned int {};
954 file_entry () = default;
956 file_entry (const char *name_
, dir_index d_index_
,
957 unsigned int mod_time_
, unsigned int length_
)
960 mod_time (mod_time_
),
964 /* Return the include directory at D_INDEX stored in LH. Returns
965 NULL if D_INDEX is out of bounds. */
966 const char *include_dir (const line_header
*lh
) const;
968 /* The file name. Note this is an observing pointer. The memory is
969 owned by debug_line_buffer. */
972 /* The directory index (1-based). */
973 dir_index d_index
{};
975 unsigned int mod_time
{};
977 unsigned int length
{};
979 /* True if referenced by the Line Number Program. */
982 /* The associated symbol table, if any. */
983 struct symtab
*symtab
{};
986 /* The line number information for a compilation unit (found in the
987 .debug_line section) begins with a "statement program header",
988 which contains the following information. */
995 /* Add an entry to the include directory table. */
996 void add_include_dir (const char *include_dir
);
998 /* Add an entry to the file name table. */
999 void add_file_name (const char *name
, dir_index d_index
,
1000 unsigned int mod_time
, unsigned int length
);
1002 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
1003 is out of bounds. */
1004 const char *include_dir_at (dir_index index
) const
1006 /* Convert directory index number (1-based) to vector index
1008 size_t vec_index
= to_underlying (index
) - 1;
1010 if (vec_index
>= include_dirs
.size ())
1012 return include_dirs
[vec_index
];
1015 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
1016 is out of bounds. */
1017 file_entry
*file_name_at (file_name_index index
)
1019 /* Convert file name index number (1-based) to vector index
1021 size_t vec_index
= to_underlying (index
) - 1;
1023 if (vec_index
>= file_names
.size ())
1025 return &file_names
[vec_index
];
1028 /* Offset of line number information in .debug_line section. */
1029 sect_offset sect_off
{};
1031 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1032 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1034 unsigned int total_length
{};
1035 unsigned short version
{};
1036 unsigned int header_length
{};
1037 unsigned char minimum_instruction_length
{};
1038 unsigned char maximum_ops_per_instruction
{};
1039 unsigned char default_is_stmt
{};
1041 unsigned char line_range
{};
1042 unsigned char opcode_base
{};
1044 /* standard_opcode_lengths[i] is the number of operands for the
1045 standard opcode whose value is i. This means that
1046 standard_opcode_lengths[0] is unused, and the last meaningful
1047 element is standard_opcode_lengths[opcode_base - 1]. */
1048 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1050 /* The include_directories table. Note these are observing
1051 pointers. The memory is owned by debug_line_buffer. */
1052 std::vector
<const char *> include_dirs
;
1054 /* The file_names table. */
1055 std::vector
<file_entry
> file_names
;
1057 /* The start and end of the statement program following this
1058 header. These point into dwarf2_per_objfile->line_buffer. */
1059 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1062 typedef std::unique_ptr
<line_header
> line_header_up
;
1065 file_entry::include_dir (const line_header
*lh
) const
1067 return lh
->include_dir_at (d_index
);
1070 /* When we construct a partial symbol table entry we only
1071 need this much information. */
1072 struct partial_die_info
: public allocate_on_obstack
1074 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1076 /* Disable assign but still keep copy ctor, which is needed
1077 load_partial_dies. */
1078 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1080 /* Adjust the partial die before generating a symbol for it. This
1081 function may set the is_external flag or change the DIE's
1083 void fixup (struct dwarf2_cu
*cu
);
1085 /* Read a minimal amount of information into the minimal die
1087 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1088 const struct abbrev_info
&abbrev
,
1089 const gdb_byte
*info_ptr
);
1091 /* Offset of this DIE. */
1092 const sect_offset sect_off
;
1094 /* DWARF-2 tag for this DIE. */
1095 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1097 /* Assorted flags describing the data found in this DIE. */
1098 const unsigned int has_children
: 1;
1100 unsigned int is_external
: 1;
1101 unsigned int is_declaration
: 1;
1102 unsigned int has_type
: 1;
1103 unsigned int has_specification
: 1;
1104 unsigned int has_pc_info
: 1;
1105 unsigned int may_be_inlined
: 1;
1107 /* This DIE has been marked DW_AT_main_subprogram. */
1108 unsigned int main_subprogram
: 1;
1110 /* Flag set if the SCOPE field of this structure has been
1112 unsigned int scope_set
: 1;
1114 /* Flag set if the DIE has a byte_size attribute. */
1115 unsigned int has_byte_size
: 1;
1117 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1118 unsigned int has_const_value
: 1;
1120 /* Flag set if any of the DIE's children are template arguments. */
1121 unsigned int has_template_arguments
: 1;
1123 /* Flag set if fixup has been called on this die. */
1124 unsigned int fixup_called
: 1;
1126 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1127 unsigned int is_dwz
: 1;
1129 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1130 unsigned int spec_is_dwz
: 1;
1132 /* The name of this DIE. Normally the value of DW_AT_name, but
1133 sometimes a default name for unnamed DIEs. */
1134 const char *name
= nullptr;
1136 /* The linkage name, if present. */
1137 const char *linkage_name
= nullptr;
1139 /* The scope to prepend to our children. This is generally
1140 allocated on the comp_unit_obstack, so will disappear
1141 when this compilation unit leaves the cache. */
1142 const char *scope
= nullptr;
1144 /* Some data associated with the partial DIE. The tag determines
1145 which field is live. */
1148 /* The location description associated with this DIE, if any. */
1149 struct dwarf_block
*locdesc
;
1150 /* The offset of an import, for DW_TAG_imported_unit. */
1151 sect_offset sect_off
;
1154 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1155 CORE_ADDR lowpc
= 0;
1156 CORE_ADDR highpc
= 0;
1158 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1159 DW_AT_sibling, if any. */
1160 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1161 could return DW_AT_sibling values to its caller load_partial_dies. */
1162 const gdb_byte
*sibling
= nullptr;
1164 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1165 DW_AT_specification (or DW_AT_abstract_origin or
1166 DW_AT_extension). */
1167 sect_offset spec_offset
{};
1169 /* Pointers to this DIE's parent, first child, and next sibling,
1171 struct partial_die_info
*die_parent
= nullptr;
1172 struct partial_die_info
*die_child
= nullptr;
1173 struct partial_die_info
*die_sibling
= nullptr;
1175 friend struct partial_die_info
*
1176 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1179 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1180 partial_die_info (sect_offset sect_off
)
1181 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1185 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1187 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1192 has_specification
= 0;
1195 main_subprogram
= 0;
1198 has_const_value
= 0;
1199 has_template_arguments
= 0;
1206 /* This data structure holds the information of an abbrev. */
1209 unsigned int number
; /* number identifying abbrev */
1210 enum dwarf_tag tag
; /* dwarf tag */
1211 unsigned short has_children
; /* boolean */
1212 unsigned short num_attrs
; /* number of attributes */
1213 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1214 struct abbrev_info
*next
; /* next in chain */
1219 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1220 ENUM_BITFIELD(dwarf_form
) form
: 16;
1222 /* It is valid only if FORM is DW_FORM_implicit_const. */
1223 LONGEST implicit_const
;
1226 /* Size of abbrev_table.abbrev_hash_table. */
1227 #define ABBREV_HASH_SIZE 121
1229 /* Top level data structure to contain an abbreviation table. */
1233 explicit abbrev_table (sect_offset off
)
1237 XOBNEWVEC (&abbrev_obstack
, struct abbrev_info
*, ABBREV_HASH_SIZE
);
1238 memset (m_abbrevs
, 0, ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
1241 DISABLE_COPY_AND_ASSIGN (abbrev_table
);
1243 /* Allocate space for a struct abbrev_info object in
1245 struct abbrev_info
*alloc_abbrev ();
1247 /* Add an abbreviation to the table. */
1248 void add_abbrev (unsigned int abbrev_number
, struct abbrev_info
*abbrev
);
1250 /* Look up an abbrev in the table.
1251 Returns NULL if the abbrev is not found. */
1253 struct abbrev_info
*lookup_abbrev (unsigned int abbrev_number
);
1256 /* Where the abbrev table came from.
1257 This is used as a sanity check when the table is used. */
1258 const sect_offset sect_off
;
1260 /* Storage for the abbrev table. */
1261 auto_obstack abbrev_obstack
;
1265 /* Hash table of abbrevs.
1266 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1267 It could be statically allocated, but the previous code didn't so we
1269 struct abbrev_info
**m_abbrevs
;
1272 typedef std::unique_ptr
<struct abbrev_table
> abbrev_table_up
;
1274 /* Attributes have a name and a value. */
1277 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1278 ENUM_BITFIELD(dwarf_form
) form
: 15;
1280 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1281 field should be in u.str (existing only for DW_STRING) but it is kept
1282 here for better struct attribute alignment. */
1283 unsigned int string_is_canonical
: 1;
1288 struct dwarf_block
*blk
;
1297 /* This data structure holds a complete die structure. */
1300 /* DWARF-2 tag for this DIE. */
1301 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1303 /* Number of attributes */
1304 unsigned char num_attrs
;
1306 /* True if we're presently building the full type name for the
1307 type derived from this DIE. */
1308 unsigned char building_fullname
: 1;
1310 /* True if this die is in process. PR 16581. */
1311 unsigned char in_process
: 1;
1314 unsigned int abbrev
;
1316 /* Offset in .debug_info or .debug_types section. */
1317 sect_offset sect_off
;
1319 /* The dies in a compilation unit form an n-ary tree. PARENT
1320 points to this die's parent; CHILD points to the first child of
1321 this node; and all the children of a given node are chained
1322 together via their SIBLING fields. */
1323 struct die_info
*child
; /* Its first child, if any. */
1324 struct die_info
*sibling
; /* Its next sibling, if any. */
1325 struct die_info
*parent
; /* Its parent, if any. */
1327 /* An array of attributes, with NUM_ATTRS elements. There may be
1328 zero, but it's not common and zero-sized arrays are not
1329 sufficiently portable C. */
1330 struct attribute attrs
[1];
1333 /* Get at parts of an attribute structure. */
1335 #define DW_STRING(attr) ((attr)->u.str)
1336 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1337 #define DW_UNSND(attr) ((attr)->u.unsnd)
1338 #define DW_BLOCK(attr) ((attr)->u.blk)
1339 #define DW_SND(attr) ((attr)->u.snd)
1340 #define DW_ADDR(attr) ((attr)->u.addr)
1341 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1343 /* Blocks are a bunch of untyped bytes. */
1348 /* Valid only if SIZE is not zero. */
1349 const gdb_byte
*data
;
1352 #ifndef ATTR_ALLOC_CHUNK
1353 #define ATTR_ALLOC_CHUNK 4
1356 /* Allocate fields for structs, unions and enums in this size. */
1357 #ifndef DW_FIELD_ALLOC_CHUNK
1358 #define DW_FIELD_ALLOC_CHUNK 4
1361 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1362 but this would require a corresponding change in unpack_field_as_long
1364 static int bits_per_byte
= 8;
1366 /* When reading a variant or variant part, we track a bit more
1367 information about the field, and store it in an object of this
1370 struct variant_field
1372 /* If we see a DW_TAG_variant, then this will be the discriminant
1374 ULONGEST discriminant_value
;
1375 /* If we see a DW_TAG_variant, then this will be set if this is the
1377 bool default_branch
;
1378 /* While reading a DW_TAG_variant_part, this will be set if this
1379 field is the discriminant. */
1380 bool is_discriminant
;
1385 int accessibility
= 0;
1387 /* Extra information to describe a variant or variant part. */
1388 struct variant_field variant
{};
1389 struct field field
{};
1394 const char *name
= nullptr;
1395 std::vector
<struct fn_field
> fnfields
;
1398 /* The routines that read and process dies for a C struct or C++ class
1399 pass lists of data member fields and lists of member function fields
1400 in an instance of a field_info structure, as defined below. */
1403 /* List of data member and baseclasses fields. */
1404 std::vector
<struct nextfield
> fields
;
1405 std::vector
<struct nextfield
> baseclasses
;
1407 /* Number of fields (including baseclasses). */
1410 /* Set if the accesibility of one of the fields is not public. */
1411 int non_public_fields
= 0;
1413 /* Member function fieldlist array, contains name of possibly overloaded
1414 member function, number of overloaded member functions and a pointer
1415 to the head of the member function field chain. */
1416 std::vector
<struct fnfieldlist
> fnfieldlists
;
1418 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1419 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1420 std::vector
<struct decl_field
> typedef_field_list
;
1422 /* Nested types defined by this class and the number of elements in this
1424 std::vector
<struct decl_field
> nested_types_list
;
1427 /* One item on the queue of compilation units to read in full symbols
1429 struct dwarf2_queue_item
1431 struct dwarf2_per_cu_data
*per_cu
;
1432 enum language pretend_language
;
1433 struct dwarf2_queue_item
*next
;
1436 /* The current queue. */
1437 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1439 /* Loaded secondary compilation units are kept in memory until they
1440 have not been referenced for the processing of this many
1441 compilation units. Set this to zero to disable caching. Cache
1442 sizes of up to at least twenty will improve startup time for
1443 typical inter-CU-reference binaries, at an obvious memory cost. */
1444 static int dwarf_max_cache_age
= 5;
1446 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1447 struct cmd_list_element
*c
, const char *value
)
1449 fprintf_filtered (file
, _("The upper bound on the age of cached "
1450 "DWARF compilation units is %s.\n"),
1454 /* local function prototypes */
1456 static const char *get_section_name (const struct dwarf2_section_info
*);
1458 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1460 static void dwarf2_find_base_address (struct die_info
*die
,
1461 struct dwarf2_cu
*cu
);
1463 static struct partial_symtab
*create_partial_symtab
1464 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1466 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1467 const gdb_byte
*info_ptr
,
1468 struct die_info
*type_unit_die
,
1469 int has_children
, void *data
);
1471 static void dwarf2_build_psymtabs_hard
1472 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1474 static void scan_partial_symbols (struct partial_die_info
*,
1475 CORE_ADDR
*, CORE_ADDR
*,
1476 int, struct dwarf2_cu
*);
1478 static void add_partial_symbol (struct partial_die_info
*,
1479 struct dwarf2_cu
*);
1481 static void add_partial_namespace (struct partial_die_info
*pdi
,
1482 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1483 int set_addrmap
, struct dwarf2_cu
*cu
);
1485 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1486 CORE_ADDR
*highpc
, int set_addrmap
,
1487 struct dwarf2_cu
*cu
);
1489 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1490 struct dwarf2_cu
*cu
);
1492 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1493 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1494 int need_pc
, struct dwarf2_cu
*cu
);
1496 static void dwarf2_read_symtab (struct partial_symtab
*,
1499 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1501 static abbrev_table_up abbrev_table_read_table
1502 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, struct dwarf2_section_info
*,
1505 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1507 static struct partial_die_info
*load_partial_dies
1508 (const struct die_reader_specs
*, const gdb_byte
*, int);
1510 /* A pair of partial_die_info and compilation unit. */
1511 struct cu_partial_die_info
1513 /* The compilation unit of the partial_die_info. */
1514 struct dwarf2_cu
*cu
;
1515 /* A partial_die_info. */
1516 struct partial_die_info
*pdi
;
1519 static struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1520 struct dwarf2_cu
*);
1522 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1523 struct attribute
*, struct attr_abbrev
*,
1526 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1528 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1530 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1532 /* Read the next three bytes (little-endian order) as an unsigned integer. */
1533 static unsigned int read_3_bytes (bfd
*, const gdb_byte
*);
1535 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1537 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1539 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1542 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1544 static LONGEST read_checked_initial_length_and_offset
1545 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1546 unsigned int *, unsigned int *);
1548 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1549 const struct comp_unit_head
*,
1552 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1554 static sect_offset read_abbrev_offset
1555 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1556 struct dwarf2_section_info
*, sect_offset
);
1558 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1560 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1562 static const char *read_indirect_string
1563 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1564 const struct comp_unit_head
*, unsigned int *);
1566 static const char *read_indirect_line_string
1567 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1568 const struct comp_unit_head
*, unsigned int *);
1570 static const char *read_indirect_string_at_offset
1571 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1572 LONGEST str_offset
);
1574 static const char *read_indirect_string_from_dwz
1575 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1577 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1579 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1583 static const char *read_str_index (const struct die_reader_specs
*reader
,
1584 ULONGEST str_index
);
1586 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1588 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1589 struct dwarf2_cu
*);
1591 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1594 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1595 struct dwarf2_cu
*cu
);
1597 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1598 struct dwarf2_cu
*cu
);
1600 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1602 static struct die_info
*die_specification (struct die_info
*die
,
1603 struct dwarf2_cu
**);
1605 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1606 struct dwarf2_cu
*cu
);
1608 static void dwarf_decode_lines (struct line_header
*, const char *,
1609 struct dwarf2_cu
*, struct partial_symtab
*,
1610 CORE_ADDR
, int decode_mapping
);
1612 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1615 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1616 struct dwarf2_cu
*, struct symbol
* = NULL
);
1618 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1619 struct dwarf2_cu
*);
1621 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1624 struct obstack
*obstack
,
1625 struct dwarf2_cu
*cu
, LONGEST
*value
,
1626 const gdb_byte
**bytes
,
1627 struct dwarf2_locexpr_baton
**baton
);
1629 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1631 static int need_gnat_info (struct dwarf2_cu
*);
1633 static struct type
*die_descriptive_type (struct die_info
*,
1634 struct dwarf2_cu
*);
1636 static void set_descriptive_type (struct type
*, struct die_info
*,
1637 struct dwarf2_cu
*);
1639 static struct type
*die_containing_type (struct die_info
*,
1640 struct dwarf2_cu
*);
1642 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1643 struct dwarf2_cu
*);
1645 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1647 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1649 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1651 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1652 const char *suffix
, int physname
,
1653 struct dwarf2_cu
*cu
);
1655 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1657 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1659 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1661 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1663 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1665 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1667 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1668 struct dwarf2_cu
*, struct partial_symtab
*);
1670 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1671 values. Keep the items ordered with increasing constraints compliance. */
1674 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1675 PC_BOUNDS_NOT_PRESENT
,
1677 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1678 were present but they do not form a valid range of PC addresses. */
1681 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1684 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1688 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1689 CORE_ADDR
*, CORE_ADDR
*,
1691 struct partial_symtab
*);
1693 static void get_scope_pc_bounds (struct die_info
*,
1694 CORE_ADDR
*, CORE_ADDR
*,
1695 struct dwarf2_cu
*);
1697 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1698 CORE_ADDR
, struct dwarf2_cu
*);
1700 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1701 struct dwarf2_cu
*);
1703 static void dwarf2_attach_fields_to_type (struct field_info
*,
1704 struct type
*, struct dwarf2_cu
*);
1706 static void dwarf2_add_member_fn (struct field_info
*,
1707 struct die_info
*, struct type
*,
1708 struct dwarf2_cu
*);
1710 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1712 struct dwarf2_cu
*);
1714 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1716 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1718 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1720 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1722 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1724 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1726 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1728 static struct type
*read_module_type (struct die_info
*die
,
1729 struct dwarf2_cu
*cu
);
1731 static const char *namespace_name (struct die_info
*die
,
1732 int *is_anonymous
, struct dwarf2_cu
*);
1734 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1736 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1738 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1739 struct dwarf2_cu
*);
1741 static struct die_info
*read_die_and_siblings_1
1742 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1745 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1746 const gdb_byte
*info_ptr
,
1747 const gdb_byte
**new_info_ptr
,
1748 struct die_info
*parent
);
1750 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1751 struct die_info
**, const gdb_byte
*,
1754 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1755 struct die_info
**, const gdb_byte
*,
1758 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1760 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1763 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1765 static const char *dwarf2_full_name (const char *name
,
1766 struct die_info
*die
,
1767 struct dwarf2_cu
*cu
);
1769 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1770 struct dwarf2_cu
*cu
);
1772 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1773 struct dwarf2_cu
**);
1775 static const char *dwarf_tag_name (unsigned int);
1777 static const char *dwarf_attr_name (unsigned int);
1779 static const char *dwarf_form_name (unsigned int);
1781 static const char *dwarf_bool_name (unsigned int);
1783 static const char *dwarf_type_encoding_name (unsigned int);
1785 static struct die_info
*sibling_die (struct die_info
*);
1787 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1789 static void dump_die_for_error (struct die_info
*);
1791 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1794 /*static*/ void dump_die (struct die_info
*, int max_level
);
1796 static void store_in_ref_table (struct die_info
*,
1797 struct dwarf2_cu
*);
1799 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1801 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1803 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1804 const struct attribute
*,
1805 struct dwarf2_cu
**);
1807 static struct die_info
*follow_die_ref (struct die_info
*,
1808 const struct attribute
*,
1809 struct dwarf2_cu
**);
1811 static struct die_info
*follow_die_sig (struct die_info
*,
1812 const struct attribute
*,
1813 struct dwarf2_cu
**);
1815 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1816 struct dwarf2_cu
*);
1818 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1819 const struct attribute
*,
1820 struct dwarf2_cu
*);
1822 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1824 static void read_signatured_type (struct signatured_type
*);
1826 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1827 struct die_info
*die
, struct dwarf2_cu
*cu
,
1828 struct dynamic_prop
*prop
);
1830 /* memory allocation interface */
1832 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1834 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1836 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1838 static int attr_form_is_block (const struct attribute
*);
1840 static int attr_form_is_section_offset (const struct attribute
*);
1842 static int attr_form_is_constant (const struct attribute
*);
1844 static int attr_form_is_ref (const struct attribute
*);
1846 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1847 struct dwarf2_loclist_baton
*baton
,
1848 const struct attribute
*attr
);
1850 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1852 struct dwarf2_cu
*cu
,
1855 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1856 const gdb_byte
*info_ptr
,
1857 struct abbrev_info
*abbrev
);
1859 static hashval_t
partial_die_hash (const void *item
);
1861 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1863 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1864 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1865 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1867 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1868 struct die_info
*comp_unit_die
,
1869 enum language pretend_language
);
1871 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1873 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1875 static struct type
*set_die_type (struct die_info
*, struct type
*,
1876 struct dwarf2_cu
*);
1878 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1880 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1882 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1885 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1888 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1891 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1892 struct dwarf2_per_cu_data
*);
1894 static void dwarf2_mark (struct dwarf2_cu
*);
1896 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1898 static struct type
*get_die_type_at_offset (sect_offset
,
1899 struct dwarf2_per_cu_data
*);
1901 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1903 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1904 enum language pretend_language
);
1906 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1908 /* Class, the destructor of which frees all allocated queue entries. This
1909 will only have work to do if an error was thrown while processing the
1910 dwarf. If no error was thrown then the queue entries should have all
1911 been processed, and freed, as we went along. */
1913 class dwarf2_queue_guard
1916 dwarf2_queue_guard () = default;
1918 /* Free any entries remaining on the queue. There should only be
1919 entries left if we hit an error while processing the dwarf. */
1920 ~dwarf2_queue_guard ()
1922 struct dwarf2_queue_item
*item
, *last
;
1924 item
= dwarf2_queue
;
1927 /* Anything still marked queued is likely to be in an
1928 inconsistent state, so discard it. */
1929 if (item
->per_cu
->queued
)
1931 if (item
->per_cu
->cu
!= NULL
)
1932 free_one_cached_comp_unit (item
->per_cu
);
1933 item
->per_cu
->queued
= 0;
1941 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
1945 /* The return type of find_file_and_directory. Note, the enclosed
1946 string pointers are only valid while this object is valid. */
1948 struct file_and_directory
1950 /* The filename. This is never NULL. */
1953 /* The compilation directory. NULL if not known. If we needed to
1954 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1955 points directly to the DW_AT_comp_dir string attribute owned by
1956 the obstack that owns the DIE. */
1957 const char *comp_dir
;
1959 /* If we needed to build a new string for comp_dir, this is what
1960 owns the storage. */
1961 std::string comp_dir_storage
;
1964 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1965 struct dwarf2_cu
*cu
);
1967 static char *file_full_name (int file
, struct line_header
*lh
,
1968 const char *comp_dir
);
1970 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1971 enum class rcuh_kind
{ COMPILE
, TYPE
};
1973 static const gdb_byte
*read_and_check_comp_unit_head
1974 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1975 struct comp_unit_head
*header
,
1976 struct dwarf2_section_info
*section
,
1977 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1978 rcuh_kind section_kind
);
1980 static void init_cutu_and_read_dies
1981 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1982 int use_existing_cu
, int keep
, bool skip_partial
,
1983 die_reader_func_ftype
*die_reader_func
, void *data
);
1985 static void init_cutu_and_read_dies_simple
1986 (struct dwarf2_per_cu_data
*this_cu
,
1987 die_reader_func_ftype
*die_reader_func
, void *data
);
1989 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1991 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1993 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1994 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1995 struct dwp_file
*dwp_file
, const char *comp_dir
,
1996 ULONGEST signature
, int is_debug_types
);
1998 static struct dwp_file
*get_dwp_file
1999 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2001 static struct dwo_unit
*lookup_dwo_comp_unit
2002 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
2004 static struct dwo_unit
*lookup_dwo_type_unit
2005 (struct signatured_type
*, const char *, const char *);
2007 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
2009 static void free_dwo_file (struct dwo_file
*);
2011 /* A unique_ptr helper to free a dwo_file. */
2013 struct dwo_file_deleter
2015 void operator() (struct dwo_file
*df
) const
2021 /* A unique pointer to a dwo_file. */
2023 typedef std::unique_ptr
<struct dwo_file
, dwo_file_deleter
> dwo_file_up
;
2025 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2027 static void check_producer (struct dwarf2_cu
*cu
);
2029 static void free_line_header_voidp (void *arg
);
2031 /* Various complaints about symbol reading that don't abort the process. */
2034 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2036 complaint (_("statement list doesn't fit in .debug_line section"));
2040 dwarf2_debug_line_missing_file_complaint (void)
2042 complaint (_(".debug_line section has line data without a file"));
2046 dwarf2_debug_line_missing_end_sequence_complaint (void)
2048 complaint (_(".debug_line section has line "
2049 "program sequence without an end"));
2053 dwarf2_complex_location_expr_complaint (void)
2055 complaint (_("location expression too complex"));
2059 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2062 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
2067 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2069 complaint (_("debug info runs off end of %s section"
2071 get_section_name (section
),
2072 get_section_file_name (section
));
2076 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2078 complaint (_("macro debug info contains a "
2079 "malformed macro definition:\n`%s'"),
2084 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2086 complaint (_("invalid attribute class or form for '%s' in '%s'"),
2090 /* Hash function for line_header_hash. */
2093 line_header_hash (const struct line_header
*ofs
)
2095 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2098 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2101 line_header_hash_voidp (const void *item
)
2103 const struct line_header
*ofs
= (const struct line_header
*) item
;
2105 return line_header_hash (ofs
);
2108 /* Equality function for line_header_hash. */
2111 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2113 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2114 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2116 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2117 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2122 /* Read the given attribute value as an address, taking the attribute's
2123 form into account. */
2126 attr_value_as_address (struct attribute
*attr
)
2130 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_addrx
2131 && attr
->form
!= DW_FORM_GNU_addr_index
)
2133 /* Aside from a few clearly defined exceptions, attributes that
2134 contain an address must always be in DW_FORM_addr form.
2135 Unfortunately, some compilers happen to be violating this
2136 requirement by encoding addresses using other forms, such
2137 as DW_FORM_data4 for example. For those broken compilers,
2138 we try to do our best, without any guarantee of success,
2139 to interpret the address correctly. It would also be nice
2140 to generate a complaint, but that would require us to maintain
2141 a list of legitimate cases where a non-address form is allowed,
2142 as well as update callers to pass in at least the CU's DWARF
2143 version. This is more overhead than what we're willing to
2144 expand for a pretty rare case. */
2145 addr
= DW_UNSND (attr
);
2148 addr
= DW_ADDR (attr
);
2153 /* See declaration. */
2155 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2156 const dwarf2_debug_sections
*names
)
2157 : objfile (objfile_
)
2160 names
= &dwarf2_elf_names
;
2162 bfd
*obfd
= objfile
->obfd
;
2164 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2165 locate_sections (obfd
, sec
, *names
);
2168 static void free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
);
2170 dwarf2_per_objfile::~dwarf2_per_objfile ()
2172 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2173 free_cached_comp_units ();
2175 if (quick_file_names_table
)
2176 htab_delete (quick_file_names_table
);
2178 if (line_header_hash
)
2179 htab_delete (line_header_hash
);
2181 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2182 VEC_free (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
);
2184 for (signatured_type
*sig_type
: all_type_units
)
2185 VEC_free (dwarf2_per_cu_ptr
, sig_type
->per_cu
.imported_symtabs
);
2187 VEC_free (dwarf2_section_info_def
, types
);
2189 if (dwo_files
!= NULL
)
2190 free_dwo_files (dwo_files
, objfile
);
2192 /* Everything else should be on the objfile obstack. */
2195 /* See declaration. */
2198 dwarf2_per_objfile::free_cached_comp_units ()
2200 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2201 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2202 while (per_cu
!= NULL
)
2204 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2207 *last_chain
= next_cu
;
2212 /* A helper class that calls free_cached_comp_units on
2215 class free_cached_comp_units
2219 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2220 : m_per_objfile (per_objfile
)
2224 ~free_cached_comp_units ()
2226 m_per_objfile
->free_cached_comp_units ();
2229 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2233 dwarf2_per_objfile
*m_per_objfile
;
2236 /* Try to locate the sections we need for DWARF 2 debugging
2237 information and return true if we have enough to do something.
2238 NAMES points to the dwarf2 section names, or is NULL if the standard
2239 ELF names are used. */
2242 dwarf2_has_info (struct objfile
*objfile
,
2243 const struct dwarf2_debug_sections
*names
)
2245 if (objfile
->flags
& OBJF_READNEVER
)
2248 struct dwarf2_per_objfile
*dwarf2_per_objfile
2249 = get_dwarf2_per_objfile (objfile
);
2251 if (dwarf2_per_objfile
== NULL
)
2252 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
2255 return (!dwarf2_per_objfile
->info
.is_virtual
2256 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2257 && !dwarf2_per_objfile
->abbrev
.is_virtual
2258 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2261 /* Return the containing section of virtual section SECTION. */
2263 static struct dwarf2_section_info
*
2264 get_containing_section (const struct dwarf2_section_info
*section
)
2266 gdb_assert (section
->is_virtual
);
2267 return section
->s
.containing_section
;
2270 /* Return the bfd owner of SECTION. */
2273 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2275 if (section
->is_virtual
)
2277 section
= get_containing_section (section
);
2278 gdb_assert (!section
->is_virtual
);
2280 return section
->s
.section
->owner
;
2283 /* Return the bfd section of SECTION.
2284 Returns NULL if the section is not present. */
2287 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2289 if (section
->is_virtual
)
2291 section
= get_containing_section (section
);
2292 gdb_assert (!section
->is_virtual
);
2294 return section
->s
.section
;
2297 /* Return the name of SECTION. */
2300 get_section_name (const struct dwarf2_section_info
*section
)
2302 asection
*sectp
= get_section_bfd_section (section
);
2304 gdb_assert (sectp
!= NULL
);
2305 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2308 /* Return the name of the file SECTION is in. */
2311 get_section_file_name (const struct dwarf2_section_info
*section
)
2313 bfd
*abfd
= get_section_bfd_owner (section
);
2315 return bfd_get_filename (abfd
);
2318 /* Return the id of SECTION.
2319 Returns 0 if SECTION doesn't exist. */
2322 get_section_id (const struct dwarf2_section_info
*section
)
2324 asection
*sectp
= get_section_bfd_section (section
);
2331 /* Return the flags of SECTION.
2332 SECTION (or containing section if this is a virtual section) must exist. */
2335 get_section_flags (const struct dwarf2_section_info
*section
)
2337 asection
*sectp
= get_section_bfd_section (section
);
2339 gdb_assert (sectp
!= NULL
);
2340 return bfd_get_section_flags (sectp
->owner
, sectp
);
2343 /* When loading sections, we look either for uncompressed section or for
2344 compressed section names. */
2347 section_is_p (const char *section_name
,
2348 const struct dwarf2_section_names
*names
)
2350 if (names
->normal
!= NULL
2351 && strcmp (section_name
, names
->normal
) == 0)
2353 if (names
->compressed
!= NULL
2354 && strcmp (section_name
, names
->compressed
) == 0)
2359 /* See declaration. */
2362 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2363 const dwarf2_debug_sections
&names
)
2365 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2367 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2370 else if (section_is_p (sectp
->name
, &names
.info
))
2372 this->info
.s
.section
= sectp
;
2373 this->info
.size
= bfd_get_section_size (sectp
);
2375 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2377 this->abbrev
.s
.section
= sectp
;
2378 this->abbrev
.size
= bfd_get_section_size (sectp
);
2380 else if (section_is_p (sectp
->name
, &names
.line
))
2382 this->line
.s
.section
= sectp
;
2383 this->line
.size
= bfd_get_section_size (sectp
);
2385 else if (section_is_p (sectp
->name
, &names
.loc
))
2387 this->loc
.s
.section
= sectp
;
2388 this->loc
.size
= bfd_get_section_size (sectp
);
2390 else if (section_is_p (sectp
->name
, &names
.loclists
))
2392 this->loclists
.s
.section
= sectp
;
2393 this->loclists
.size
= bfd_get_section_size (sectp
);
2395 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2397 this->macinfo
.s
.section
= sectp
;
2398 this->macinfo
.size
= bfd_get_section_size (sectp
);
2400 else if (section_is_p (sectp
->name
, &names
.macro
))
2402 this->macro
.s
.section
= sectp
;
2403 this->macro
.size
= bfd_get_section_size (sectp
);
2405 else if (section_is_p (sectp
->name
, &names
.str
))
2407 this->str
.s
.section
= sectp
;
2408 this->str
.size
= bfd_get_section_size (sectp
);
2410 else if (section_is_p (sectp
->name
, &names
.line_str
))
2412 this->line_str
.s
.section
= sectp
;
2413 this->line_str
.size
= bfd_get_section_size (sectp
);
2415 else if (section_is_p (sectp
->name
, &names
.addr
))
2417 this->addr
.s
.section
= sectp
;
2418 this->addr
.size
= bfd_get_section_size (sectp
);
2420 else if (section_is_p (sectp
->name
, &names
.frame
))
2422 this->frame
.s
.section
= sectp
;
2423 this->frame
.size
= bfd_get_section_size (sectp
);
2425 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2427 this->eh_frame
.s
.section
= sectp
;
2428 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2430 else if (section_is_p (sectp
->name
, &names
.ranges
))
2432 this->ranges
.s
.section
= sectp
;
2433 this->ranges
.size
= bfd_get_section_size (sectp
);
2435 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2437 this->rnglists
.s
.section
= sectp
;
2438 this->rnglists
.size
= bfd_get_section_size (sectp
);
2440 else if (section_is_p (sectp
->name
, &names
.types
))
2442 struct dwarf2_section_info type_section
;
2444 memset (&type_section
, 0, sizeof (type_section
));
2445 type_section
.s
.section
= sectp
;
2446 type_section
.size
= bfd_get_section_size (sectp
);
2448 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2451 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2453 this->gdb_index
.s
.section
= sectp
;
2454 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2456 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2458 this->debug_names
.s
.section
= sectp
;
2459 this->debug_names
.size
= bfd_get_section_size (sectp
);
2461 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2463 this->debug_aranges
.s
.section
= sectp
;
2464 this->debug_aranges
.size
= bfd_get_section_size (sectp
);
2467 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2468 && bfd_section_vma (abfd
, sectp
) == 0)
2469 this->has_section_at_zero
= true;
2472 /* A helper function that decides whether a section is empty,
2476 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2478 if (section
->is_virtual
)
2479 return section
->size
== 0;
2480 return section
->s
.section
== NULL
|| section
->size
== 0;
2483 /* See dwarf2read.h. */
2486 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2490 gdb_byte
*buf
, *retbuf
;
2494 info
->buffer
= NULL
;
2497 if (dwarf2_section_empty_p (info
))
2500 sectp
= get_section_bfd_section (info
);
2502 /* If this is a virtual section we need to read in the real one first. */
2503 if (info
->is_virtual
)
2505 struct dwarf2_section_info
*containing_section
=
2506 get_containing_section (info
);
2508 gdb_assert (sectp
!= NULL
);
2509 if ((sectp
->flags
& SEC_RELOC
) != 0)
2511 error (_("Dwarf Error: DWP format V2 with relocations is not"
2512 " supported in section %s [in module %s]"),
2513 get_section_name (info
), get_section_file_name (info
));
2515 dwarf2_read_section (objfile
, containing_section
);
2516 /* Other code should have already caught virtual sections that don't
2518 gdb_assert (info
->virtual_offset
+ info
->size
2519 <= containing_section
->size
);
2520 /* If the real section is empty or there was a problem reading the
2521 section we shouldn't get here. */
2522 gdb_assert (containing_section
->buffer
!= NULL
);
2523 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2527 /* If the section has relocations, we must read it ourselves.
2528 Otherwise we attach it to the BFD. */
2529 if ((sectp
->flags
& SEC_RELOC
) == 0)
2531 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2535 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2538 /* When debugging .o files, we may need to apply relocations; see
2539 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2540 We never compress sections in .o files, so we only need to
2541 try this when the section is not compressed. */
2542 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2545 info
->buffer
= retbuf
;
2549 abfd
= get_section_bfd_owner (info
);
2550 gdb_assert (abfd
!= NULL
);
2552 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2553 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2555 error (_("Dwarf Error: Can't read DWARF data"
2556 " in section %s [in module %s]"),
2557 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2561 /* A helper function that returns the size of a section in a safe way.
2562 If you are positive that the section has been read before using the
2563 size, then it is safe to refer to the dwarf2_section_info object's
2564 "size" field directly. In other cases, you must call this
2565 function, because for compressed sections the size field is not set
2566 correctly until the section has been read. */
2568 static bfd_size_type
2569 dwarf2_section_size (struct objfile
*objfile
,
2570 struct dwarf2_section_info
*info
)
2573 dwarf2_read_section (objfile
, info
);
2577 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2581 dwarf2_get_section_info (struct objfile
*objfile
,
2582 enum dwarf2_section_enum sect
,
2583 asection
**sectp
, const gdb_byte
**bufp
,
2584 bfd_size_type
*sizep
)
2586 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
2587 struct dwarf2_section_info
*info
;
2589 /* We may see an objfile without any DWARF, in which case we just
2600 case DWARF2_DEBUG_FRAME
:
2601 info
= &data
->frame
;
2603 case DWARF2_EH_FRAME
:
2604 info
= &data
->eh_frame
;
2607 gdb_assert_not_reached ("unexpected section");
2610 dwarf2_read_section (objfile
, info
);
2612 *sectp
= get_section_bfd_section (info
);
2613 *bufp
= info
->buffer
;
2614 *sizep
= info
->size
;
2617 /* A helper function to find the sections for a .dwz file. */
2620 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2622 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2624 /* Note that we only support the standard ELF names, because .dwz
2625 is ELF-only (at the time of writing). */
2626 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2628 dwz_file
->abbrev
.s
.section
= sectp
;
2629 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2631 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2633 dwz_file
->info
.s
.section
= sectp
;
2634 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2636 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2638 dwz_file
->str
.s
.section
= sectp
;
2639 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2641 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2643 dwz_file
->line
.s
.section
= sectp
;
2644 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2646 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2648 dwz_file
->macro
.s
.section
= sectp
;
2649 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2651 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2653 dwz_file
->gdb_index
.s
.section
= sectp
;
2654 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2656 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2658 dwz_file
->debug_names
.s
.section
= sectp
;
2659 dwz_file
->debug_names
.size
= bfd_get_section_size (sectp
);
2663 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2664 there is no .gnu_debugaltlink section in the file. Error if there
2665 is such a section but the file cannot be found. */
2667 static struct dwz_file
*
2668 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2670 const char *filename
;
2671 bfd_size_type buildid_len_arg
;
2675 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2676 return dwarf2_per_objfile
->dwz_file
.get ();
2678 bfd_set_error (bfd_error_no_error
);
2679 gdb::unique_xmalloc_ptr
<char> data
2680 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2681 &buildid_len_arg
, &buildid
));
2684 if (bfd_get_error () == bfd_error_no_error
)
2686 error (_("could not read '.gnu_debugaltlink' section: %s"),
2687 bfd_errmsg (bfd_get_error ()));
2690 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2692 buildid_len
= (size_t) buildid_len_arg
;
2694 filename
= data
.get ();
2696 std::string abs_storage
;
2697 if (!IS_ABSOLUTE_PATH (filename
))
2699 gdb::unique_xmalloc_ptr
<char> abs
2700 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2702 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2703 filename
= abs_storage
.c_str ();
2706 /* First try the file name given in the section. If that doesn't
2707 work, try to use the build-id instead. */
2708 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2709 if (dwz_bfd
!= NULL
)
2711 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2712 dwz_bfd
.reset (nullptr);
2715 if (dwz_bfd
== NULL
)
2716 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2718 if (dwz_bfd
== NULL
)
2719 error (_("could not find '.gnu_debugaltlink' file for %s"),
2720 objfile_name (dwarf2_per_objfile
->objfile
));
2722 std::unique_ptr
<struct dwz_file
> result
2723 (new struct dwz_file (std::move (dwz_bfd
)));
2725 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2728 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2729 result
->dwz_bfd
.get ());
2730 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2731 return dwarf2_per_objfile
->dwz_file
.get ();
2734 /* DWARF quick_symbols_functions support. */
2736 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2737 unique line tables, so we maintain a separate table of all .debug_line
2738 derived entries to support the sharing.
2739 All the quick functions need is the list of file names. We discard the
2740 line_header when we're done and don't need to record it here. */
2741 struct quick_file_names
2743 /* The data used to construct the hash key. */
2744 struct stmt_list_hash hash
;
2746 /* The number of entries in file_names, real_names. */
2747 unsigned int num_file_names
;
2749 /* The file names from the line table, after being run through
2751 const char **file_names
;
2753 /* The file names from the line table after being run through
2754 gdb_realpath. These are computed lazily. */
2755 const char **real_names
;
2758 /* When using the index (and thus not using psymtabs), each CU has an
2759 object of this type. This is used to hold information needed by
2760 the various "quick" methods. */
2761 struct dwarf2_per_cu_quick_data
2763 /* The file table. This can be NULL if there was no file table
2764 or it's currently not read in.
2765 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2766 struct quick_file_names
*file_names
;
2768 /* The corresponding symbol table. This is NULL if symbols for this
2769 CU have not yet been read. */
2770 struct compunit_symtab
*compunit_symtab
;
2772 /* A temporary mark bit used when iterating over all CUs in
2773 expand_symtabs_matching. */
2774 unsigned int mark
: 1;
2776 /* True if we've tried to read the file table and found there isn't one.
2777 There will be no point in trying to read it again next time. */
2778 unsigned int no_file_data
: 1;
2781 /* Utility hash function for a stmt_list_hash. */
2784 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2788 if (stmt_list_hash
->dwo_unit
!= NULL
)
2789 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2790 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2794 /* Utility equality function for a stmt_list_hash. */
2797 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2798 const struct stmt_list_hash
*rhs
)
2800 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2802 if (lhs
->dwo_unit
!= NULL
2803 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2806 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2809 /* Hash function for a quick_file_names. */
2812 hash_file_name_entry (const void *e
)
2814 const struct quick_file_names
*file_data
2815 = (const struct quick_file_names
*) e
;
2817 return hash_stmt_list_entry (&file_data
->hash
);
2820 /* Equality function for a quick_file_names. */
2823 eq_file_name_entry (const void *a
, const void *b
)
2825 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2826 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2828 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2831 /* Delete function for a quick_file_names. */
2834 delete_file_name_entry (void *e
)
2836 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2839 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2841 xfree ((void*) file_data
->file_names
[i
]);
2842 if (file_data
->real_names
)
2843 xfree ((void*) file_data
->real_names
[i
]);
2846 /* The space for the struct itself lives on objfile_obstack,
2847 so we don't free it here. */
2850 /* Create a quick_file_names hash table. */
2853 create_quick_file_names_table (unsigned int nr_initial_entries
)
2855 return htab_create_alloc (nr_initial_entries
,
2856 hash_file_name_entry
, eq_file_name_entry
,
2857 delete_file_name_entry
, xcalloc
, xfree
);
2860 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2861 have to be created afterwards. You should call age_cached_comp_units after
2862 processing PER_CU->CU. dw2_setup must have been already called. */
2865 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2867 if (per_cu
->is_debug_types
)
2868 load_full_type_unit (per_cu
);
2870 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2872 if (per_cu
->cu
== NULL
)
2873 return; /* Dummy CU. */
2875 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2878 /* Read in the symbols for PER_CU. */
2881 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2883 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2885 /* Skip type_unit_groups, reading the type units they contain
2886 is handled elsewhere. */
2887 if (IS_TYPE_UNIT_GROUP (per_cu
))
2890 /* The destructor of dwarf2_queue_guard frees any entries left on
2891 the queue. After this point we're guaranteed to leave this function
2892 with the dwarf queue empty. */
2893 dwarf2_queue_guard q_guard
;
2895 if (dwarf2_per_objfile
->using_index
2896 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2897 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2899 queue_comp_unit (per_cu
, language_minimal
);
2900 load_cu (per_cu
, skip_partial
);
2902 /* If we just loaded a CU from a DWO, and we're working with an index
2903 that may badly handle TUs, load all the TUs in that DWO as well.
2904 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2905 if (!per_cu
->is_debug_types
2906 && per_cu
->cu
!= NULL
2907 && per_cu
->cu
->dwo_unit
!= NULL
2908 && dwarf2_per_objfile
->index_table
!= NULL
2909 && dwarf2_per_objfile
->index_table
->version
<= 7
2910 /* DWP files aren't supported yet. */
2911 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2912 queue_and_load_all_dwo_tus (per_cu
);
2915 process_queue (dwarf2_per_objfile
);
2917 /* Age the cache, releasing compilation units that have not
2918 been used recently. */
2919 age_cached_comp_units (dwarf2_per_objfile
);
2922 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2923 the objfile from which this CU came. Returns the resulting symbol
2926 static struct compunit_symtab
*
2927 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2929 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2931 gdb_assert (dwarf2_per_objfile
->using_index
);
2932 if (!per_cu
->v
.quick
->compunit_symtab
)
2934 free_cached_comp_units
freer (dwarf2_per_objfile
);
2935 scoped_restore decrementer
= increment_reading_symtab ();
2936 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2937 process_cu_includes (dwarf2_per_objfile
);
2940 return per_cu
->v
.quick
->compunit_symtab
;
2943 /* See declaration. */
2945 dwarf2_per_cu_data
*
2946 dwarf2_per_objfile::get_cutu (int index
)
2948 if (index
>= this->all_comp_units
.size ())
2950 index
-= this->all_comp_units
.size ();
2951 gdb_assert (index
< this->all_type_units
.size ());
2952 return &this->all_type_units
[index
]->per_cu
;
2955 return this->all_comp_units
[index
];
2958 /* See declaration. */
2960 dwarf2_per_cu_data
*
2961 dwarf2_per_objfile::get_cu (int index
)
2963 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2965 return this->all_comp_units
[index
];
2968 /* See declaration. */
2971 dwarf2_per_objfile::get_tu (int index
)
2973 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2975 return this->all_type_units
[index
];
2978 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2979 objfile_obstack, and constructed with the specified field
2982 static dwarf2_per_cu_data
*
2983 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2984 struct dwarf2_section_info
*section
,
2986 sect_offset sect_off
, ULONGEST length
)
2988 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2989 dwarf2_per_cu_data
*the_cu
2990 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2991 struct dwarf2_per_cu_data
);
2992 the_cu
->sect_off
= sect_off
;
2993 the_cu
->length
= length
;
2994 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2995 the_cu
->section
= section
;
2996 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2997 struct dwarf2_per_cu_quick_data
);
2998 the_cu
->is_dwz
= is_dwz
;
3002 /* A helper for create_cus_from_index that handles a given list of
3006 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3007 const gdb_byte
*cu_list
, offset_type n_elements
,
3008 struct dwarf2_section_info
*section
,
3011 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
3013 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3015 sect_offset sect_off
3016 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
3017 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
3020 dwarf2_per_cu_data
*per_cu
3021 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
3023 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
3027 /* Read the CU list from the mapped index, and use it to create all
3028 the CU objects for this objfile. */
3031 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3032 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3033 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3035 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
3036 dwarf2_per_objfile
->all_comp_units
.reserve
3037 ((cu_list_elements
+ dwz_elements
) / 2);
3039 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3040 &dwarf2_per_objfile
->info
, 0);
3042 if (dwz_elements
== 0)
3045 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3046 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
3050 /* Create the signatured type hash table from the index. */
3053 create_signatured_type_table_from_index
3054 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3055 struct dwarf2_section_info
*section
,
3056 const gdb_byte
*bytes
,
3057 offset_type elements
)
3059 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3061 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3062 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
3064 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3066 for (offset_type i
= 0; i
< elements
; i
+= 3)
3068 struct signatured_type
*sig_type
;
3071 cu_offset type_offset_in_tu
;
3073 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3074 sect_offset sect_off
3075 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3077 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3079 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3082 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3083 struct signatured_type
);
3084 sig_type
->signature
= signature
;
3085 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3086 sig_type
->per_cu
.is_debug_types
= 1;
3087 sig_type
->per_cu
.section
= section
;
3088 sig_type
->per_cu
.sect_off
= sect_off
;
3089 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3090 sig_type
->per_cu
.v
.quick
3091 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3092 struct dwarf2_per_cu_quick_data
);
3094 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3097 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3100 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3103 /* Create the signatured type hash table from .debug_names. */
3106 create_signatured_type_table_from_debug_names
3107 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3108 const mapped_debug_names
&map
,
3109 struct dwarf2_section_info
*section
,
3110 struct dwarf2_section_info
*abbrev_section
)
3112 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3114 dwarf2_read_section (objfile
, section
);
3115 dwarf2_read_section (objfile
, abbrev_section
);
3117 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3118 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
3120 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3122 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3124 struct signatured_type
*sig_type
;
3127 sect_offset sect_off
3128 = (sect_offset
) (extract_unsigned_integer
3129 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3131 map
.dwarf5_byte_order
));
3133 comp_unit_head cu_header
;
3134 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3136 section
->buffer
+ to_underlying (sect_off
),
3139 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3140 struct signatured_type
);
3141 sig_type
->signature
= cu_header
.signature
;
3142 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3143 sig_type
->per_cu
.is_debug_types
= 1;
3144 sig_type
->per_cu
.section
= section
;
3145 sig_type
->per_cu
.sect_off
= sect_off
;
3146 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3147 sig_type
->per_cu
.v
.quick
3148 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3149 struct dwarf2_per_cu_quick_data
);
3151 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3154 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3157 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3160 /* Read the address map data from the mapped index, and use it to
3161 populate the objfile's psymtabs_addrmap. */
3164 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3165 struct mapped_index
*index
)
3167 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3168 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3169 const gdb_byte
*iter
, *end
;
3170 struct addrmap
*mutable_map
;
3173 auto_obstack temp_obstack
;
3175 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3177 iter
= index
->address_table
.data ();
3178 end
= iter
+ index
->address_table
.size ();
3180 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3184 ULONGEST hi
, lo
, cu_index
;
3185 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3187 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3189 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3194 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
3195 hex_string (lo
), hex_string (hi
));
3199 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
3201 complaint (_(".gdb_index address table has invalid CU number %u"),
3202 (unsigned) cu_index
);
3206 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
3207 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
3208 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3209 dwarf2_per_objfile
->get_cu (cu_index
));
3212 objfile
->partial_symtabs
->psymtabs_addrmap
3213 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3216 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3217 populate the objfile's psymtabs_addrmap. */
3220 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3221 struct dwarf2_section_info
*section
)
3223 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3224 bfd
*abfd
= objfile
->obfd
;
3225 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3226 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3227 SECT_OFF_TEXT (objfile
));
3229 auto_obstack temp_obstack
;
3230 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3232 std::unordered_map
<sect_offset
,
3233 dwarf2_per_cu_data
*,
3234 gdb::hash_enum
<sect_offset
>>
3235 debug_info_offset_to_per_cu
;
3236 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3238 const auto insertpair
3239 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3240 if (!insertpair
.second
)
3242 warning (_("Section .debug_aranges in %s has duplicate "
3243 "debug_info_offset %s, ignoring .debug_aranges."),
3244 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3249 dwarf2_read_section (objfile
, section
);
3251 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3253 const gdb_byte
*addr
= section
->buffer
;
3255 while (addr
< section
->buffer
+ section
->size
)
3257 const gdb_byte
*const entry_addr
= addr
;
3258 unsigned int bytes_read
;
3260 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3264 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3265 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3266 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3267 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3269 warning (_("Section .debug_aranges in %s entry at offset %zu "
3270 "length %s exceeds section length %s, "
3271 "ignoring .debug_aranges."),
3272 objfile_name (objfile
), entry_addr
- section
->buffer
,
3273 plongest (bytes_read
+ entry_length
),
3274 pulongest (section
->size
));
3278 /* The version number. */
3279 const uint16_t version
= read_2_bytes (abfd
, addr
);
3283 warning (_("Section .debug_aranges in %s entry at offset %zu "
3284 "has unsupported version %d, ignoring .debug_aranges."),
3285 objfile_name (objfile
), entry_addr
- section
->buffer
,
3290 const uint64_t debug_info_offset
3291 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3292 addr
+= offset_size
;
3293 const auto per_cu_it
3294 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3295 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3297 warning (_("Section .debug_aranges in %s entry at offset %zu "
3298 "debug_info_offset %s does not exists, "
3299 "ignoring .debug_aranges."),
3300 objfile_name (objfile
), entry_addr
- section
->buffer
,
3301 pulongest (debug_info_offset
));
3304 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3306 const uint8_t address_size
= *addr
++;
3307 if (address_size
< 1 || address_size
> 8)
3309 warning (_("Section .debug_aranges in %s entry at offset %zu "
3310 "address_size %u is invalid, ignoring .debug_aranges."),
3311 objfile_name (objfile
), entry_addr
- section
->buffer
,
3316 const uint8_t segment_selector_size
= *addr
++;
3317 if (segment_selector_size
!= 0)
3319 warning (_("Section .debug_aranges in %s entry at offset %zu "
3320 "segment_selector_size %u is not supported, "
3321 "ignoring .debug_aranges."),
3322 objfile_name (objfile
), entry_addr
- section
->buffer
,
3323 segment_selector_size
);
3327 /* Must pad to an alignment boundary that is twice the address
3328 size. It is undocumented by the DWARF standard but GCC does
3330 for (size_t padding
= ((-(addr
- section
->buffer
))
3331 & (2 * address_size
- 1));
3332 padding
> 0; padding
--)
3335 warning (_("Section .debug_aranges in %s entry at offset %zu "
3336 "padding is not zero, ignoring .debug_aranges."),
3337 objfile_name (objfile
), entry_addr
- section
->buffer
);
3343 if (addr
+ 2 * address_size
> entry_end
)
3345 warning (_("Section .debug_aranges in %s entry at offset %zu "
3346 "address list is not properly terminated, "
3347 "ignoring .debug_aranges."),
3348 objfile_name (objfile
), entry_addr
- section
->buffer
);
3351 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3353 addr
+= address_size
;
3354 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3356 addr
+= address_size
;
3357 if (start
== 0 && length
== 0)
3359 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3361 /* Symbol was eliminated due to a COMDAT group. */
3364 ULONGEST end
= start
+ length
;
3365 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
3367 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
3369 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3373 objfile
->partial_symtabs
->psymtabs_addrmap
3374 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3377 /* Find a slot in the mapped index INDEX for the object named NAME.
3378 If NAME is found, set *VEC_OUT to point to the CU vector in the
3379 constant pool and return true. If NAME cannot be found, return
3383 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3384 offset_type
**vec_out
)
3387 offset_type slot
, step
;
3388 int (*cmp
) (const char *, const char *);
3390 gdb::unique_xmalloc_ptr
<char> without_params
;
3391 if (current_language
->la_language
== language_cplus
3392 || current_language
->la_language
== language_fortran
3393 || current_language
->la_language
== language_d
)
3395 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3398 if (strchr (name
, '(') != NULL
)
3400 without_params
= cp_remove_params (name
);
3402 if (without_params
!= NULL
)
3403 name
= without_params
.get ();
3407 /* Index version 4 did not support case insensitive searches. But the
3408 indices for case insensitive languages are built in lowercase, therefore
3409 simulate our NAME being searched is also lowercased. */
3410 hash
= mapped_index_string_hash ((index
->version
== 4
3411 && case_sensitivity
== case_sensitive_off
3412 ? 5 : index
->version
),
3415 slot
= hash
& (index
->symbol_table
.size () - 1);
3416 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3417 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3423 const auto &bucket
= index
->symbol_table
[slot
];
3424 if (bucket
.name
== 0 && bucket
.vec
== 0)
3427 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3428 if (!cmp (name
, str
))
3430 *vec_out
= (offset_type
*) (index
->constant_pool
3431 + MAYBE_SWAP (bucket
.vec
));
3435 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3439 /* A helper function that reads the .gdb_index from BUFFER and fills
3440 in MAP. FILENAME is the name of the file containing the data;
3441 it is used for error reporting. DEPRECATED_OK is true if it is
3442 ok to use deprecated sections.
3444 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3445 out parameters that are filled in with information about the CU and
3446 TU lists in the section.
3448 Returns true if all went well, false otherwise. */
3451 read_gdb_index_from_buffer (struct objfile
*objfile
,
3452 const char *filename
,
3454 gdb::array_view
<const gdb_byte
> buffer
,
3455 struct mapped_index
*map
,
3456 const gdb_byte
**cu_list
,
3457 offset_type
*cu_list_elements
,
3458 const gdb_byte
**types_list
,
3459 offset_type
*types_list_elements
)
3461 const gdb_byte
*addr
= &buffer
[0];
3463 /* Version check. */
3464 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
3465 /* Versions earlier than 3 emitted every copy of a psymbol. This
3466 causes the index to behave very poorly for certain requests. Version 3
3467 contained incomplete addrmap. So, it seems better to just ignore such
3471 static int warning_printed
= 0;
3472 if (!warning_printed
)
3474 warning (_("Skipping obsolete .gdb_index section in %s."),
3476 warning_printed
= 1;
3480 /* Index version 4 uses a different hash function than index version
3483 Versions earlier than 6 did not emit psymbols for inlined
3484 functions. Using these files will cause GDB not to be able to
3485 set breakpoints on inlined functions by name, so we ignore these
3486 indices unless the user has done
3487 "set use-deprecated-index-sections on". */
3488 if (version
< 6 && !deprecated_ok
)
3490 static int warning_printed
= 0;
3491 if (!warning_printed
)
3494 Skipping deprecated .gdb_index section in %s.\n\
3495 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3496 to use the section anyway."),
3498 warning_printed
= 1;
3502 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3503 of the TU (for symbols coming from TUs),
3504 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3505 Plus gold-generated indices can have duplicate entries for global symbols,
3506 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3507 These are just performance bugs, and we can't distinguish gdb-generated
3508 indices from gold-generated ones, so issue no warning here. */
3510 /* Indexes with higher version than the one supported by GDB may be no
3511 longer backward compatible. */
3515 map
->version
= version
;
3517 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3520 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3521 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3525 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3526 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3527 - MAYBE_SWAP (metadata
[i
]))
3531 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3532 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3534 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3537 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3538 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3540 = gdb::array_view
<mapped_index::symbol_table_slot
>
3541 ((mapped_index::symbol_table_slot
*) symbol_table
,
3542 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3545 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3550 /* Callback types for dwarf2_read_gdb_index. */
3552 typedef gdb::function_view
3553 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
3554 get_gdb_index_contents_ftype
;
3555 typedef gdb::function_view
3556 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3557 get_gdb_index_contents_dwz_ftype
;
3559 /* Read .gdb_index. If everything went ok, initialize the "quick"
3560 elements of all the CUs and return 1. Otherwise, return 0. */
3563 dwarf2_read_gdb_index
3564 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3565 get_gdb_index_contents_ftype get_gdb_index_contents
,
3566 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3568 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3569 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3570 struct dwz_file
*dwz
;
3571 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3573 gdb::array_view
<const gdb_byte
> main_index_contents
3574 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3576 if (main_index_contents
.empty ())
3579 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3580 if (!read_gdb_index_from_buffer (objfile
, objfile_name (objfile
),
3581 use_deprecated_index_sections
,
3582 main_index_contents
, map
.get (), &cu_list
,
3583 &cu_list_elements
, &types_list
,
3584 &types_list_elements
))
3587 /* Don't use the index if it's empty. */
3588 if (map
->symbol_table
.empty ())
3591 /* If there is a .dwz file, read it so we can get its CU list as
3593 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3596 struct mapped_index dwz_map
;
3597 const gdb_byte
*dwz_types_ignore
;
3598 offset_type dwz_types_elements_ignore
;
3600 gdb::array_view
<const gdb_byte
> dwz_index_content
3601 = get_gdb_index_contents_dwz (objfile
, dwz
);
3603 if (dwz_index_content
.empty ())
3606 if (!read_gdb_index_from_buffer (objfile
,
3607 bfd_get_filename (dwz
->dwz_bfd
), 1,
3608 dwz_index_content
, &dwz_map
,
3609 &dwz_list
, &dwz_list_elements
,
3611 &dwz_types_elements_ignore
))
3613 warning (_("could not read '.gdb_index' section from %s; skipping"),
3614 bfd_get_filename (dwz
->dwz_bfd
));
3619 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3620 dwz_list
, dwz_list_elements
);
3622 if (types_list_elements
)
3624 struct dwarf2_section_info
*section
;
3626 /* We can only handle a single .debug_types when we have an
3628 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3631 section
= VEC_index (dwarf2_section_info_def
,
3632 dwarf2_per_objfile
->types
, 0);
3634 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3635 types_list
, types_list_elements
);
3638 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3640 dwarf2_per_objfile
->index_table
= std::move (map
);
3641 dwarf2_per_objfile
->using_index
= 1;
3642 dwarf2_per_objfile
->quick_file_names_table
=
3643 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3648 /* die_reader_func for dw2_get_file_names. */
3651 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3652 const gdb_byte
*info_ptr
,
3653 struct die_info
*comp_unit_die
,
3657 struct dwarf2_cu
*cu
= reader
->cu
;
3658 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3659 struct dwarf2_per_objfile
*dwarf2_per_objfile
3660 = cu
->per_cu
->dwarf2_per_objfile
;
3661 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3662 struct dwarf2_per_cu_data
*lh_cu
;
3663 struct attribute
*attr
;
3666 struct quick_file_names
*qfn
;
3668 gdb_assert (! this_cu
->is_debug_types
);
3670 /* Our callers never want to match partial units -- instead they
3671 will match the enclosing full CU. */
3672 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3674 this_cu
->v
.quick
->no_file_data
= 1;
3682 sect_offset line_offset
{};
3684 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3687 struct quick_file_names find_entry
;
3689 line_offset
= (sect_offset
) DW_UNSND (attr
);
3691 /* We may have already read in this line header (TU line header sharing).
3692 If we have we're done. */
3693 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3694 find_entry
.hash
.line_sect_off
= line_offset
;
3695 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3696 &find_entry
, INSERT
);
3699 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3703 lh
= dwarf_decode_line_header (line_offset
, cu
);
3707 lh_cu
->v
.quick
->no_file_data
= 1;
3711 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3712 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3713 qfn
->hash
.line_sect_off
= line_offset
;
3714 gdb_assert (slot
!= NULL
);
3717 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3719 qfn
->num_file_names
= lh
->file_names
.size ();
3721 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3722 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3723 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3724 qfn
->real_names
= NULL
;
3726 lh_cu
->v
.quick
->file_names
= qfn
;
3729 /* A helper for the "quick" functions which attempts to read the line
3730 table for THIS_CU. */
3732 static struct quick_file_names
*
3733 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3735 /* This should never be called for TUs. */
3736 gdb_assert (! this_cu
->is_debug_types
);
3737 /* Nor type unit groups. */
3738 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3740 if (this_cu
->v
.quick
->file_names
!= NULL
)
3741 return this_cu
->v
.quick
->file_names
;
3742 /* If we know there is no line data, no point in looking again. */
3743 if (this_cu
->v
.quick
->no_file_data
)
3746 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3748 if (this_cu
->v
.quick
->no_file_data
)
3750 return this_cu
->v
.quick
->file_names
;
3753 /* A helper for the "quick" functions which computes and caches the
3754 real path for a given file name from the line table. */
3757 dw2_get_real_path (struct objfile
*objfile
,
3758 struct quick_file_names
*qfn
, int index
)
3760 if (qfn
->real_names
== NULL
)
3761 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3762 qfn
->num_file_names
, const char *);
3764 if (qfn
->real_names
[index
] == NULL
)
3765 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3767 return qfn
->real_names
[index
];
3770 static struct symtab
*
3771 dw2_find_last_source_symtab (struct objfile
*objfile
)
3773 struct dwarf2_per_objfile
*dwarf2_per_objfile
3774 = get_dwarf2_per_objfile (objfile
);
3775 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3776 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3781 return compunit_primary_filetab (cust
);
3784 /* Traversal function for dw2_forget_cached_source_info. */
3787 dw2_free_cached_file_names (void **slot
, void *info
)
3789 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3791 if (file_data
->real_names
)
3795 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3797 xfree ((void*) file_data
->real_names
[i
]);
3798 file_data
->real_names
[i
] = NULL
;
3806 dw2_forget_cached_source_info (struct objfile
*objfile
)
3808 struct dwarf2_per_objfile
*dwarf2_per_objfile
3809 = get_dwarf2_per_objfile (objfile
);
3811 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3812 dw2_free_cached_file_names
, NULL
);
3815 /* Helper function for dw2_map_symtabs_matching_filename that expands
3816 the symtabs and calls the iterator. */
3819 dw2_map_expand_apply (struct objfile
*objfile
,
3820 struct dwarf2_per_cu_data
*per_cu
,
3821 const char *name
, const char *real_path
,
3822 gdb::function_view
<bool (symtab
*)> callback
)
3824 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3826 /* Don't visit already-expanded CUs. */
3827 if (per_cu
->v
.quick
->compunit_symtab
)
3830 /* This may expand more than one symtab, and we want to iterate over
3832 dw2_instantiate_symtab (per_cu
, false);
3834 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3835 last_made
, callback
);
3838 /* Implementation of the map_symtabs_matching_filename method. */
3841 dw2_map_symtabs_matching_filename
3842 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3843 gdb::function_view
<bool (symtab
*)> callback
)
3845 const char *name_basename
= lbasename (name
);
3846 struct dwarf2_per_objfile
*dwarf2_per_objfile
3847 = get_dwarf2_per_objfile (objfile
);
3849 /* The rule is CUs specify all the files, including those used by
3850 any TU, so there's no need to scan TUs here. */
3852 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3854 /* We only need to look at symtabs not already expanded. */
3855 if (per_cu
->v
.quick
->compunit_symtab
)
3858 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3859 if (file_data
== NULL
)
3862 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3864 const char *this_name
= file_data
->file_names
[j
];
3865 const char *this_real_name
;
3867 if (compare_filenames_for_search (this_name
, name
))
3869 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3875 /* Before we invoke realpath, which can get expensive when many
3876 files are involved, do a quick comparison of the basenames. */
3877 if (! basenames_may_differ
3878 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3881 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3882 if (compare_filenames_for_search (this_real_name
, name
))
3884 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3890 if (real_path
!= NULL
)
3892 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3893 gdb_assert (IS_ABSOLUTE_PATH (name
));
3894 if (this_real_name
!= NULL
3895 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3897 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3909 /* Struct used to manage iterating over all CUs looking for a symbol. */
3911 struct dw2_symtab_iterator
3913 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3914 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3915 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3916 int want_specific_block
;
3917 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3918 Unused if !WANT_SPECIFIC_BLOCK. */
3920 /* The kind of symbol we're looking for. */
3922 /* The list of CUs from the index entry of the symbol,
3923 or NULL if not found. */
3925 /* The next element in VEC to look at. */
3927 /* The number of elements in VEC, or zero if there is no match. */
3929 /* Have we seen a global version of the symbol?
3930 If so we can ignore all further global instances.
3931 This is to work around gold/15646, inefficient gold-generated
3936 /* Initialize the index symtab iterator ITER.
3937 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3938 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3941 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3942 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3943 int want_specific_block
,
3948 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3949 iter
->want_specific_block
= want_specific_block
;
3950 iter
->block_index
= block_index
;
3951 iter
->domain
= domain
;
3953 iter
->global_seen
= 0;
3955 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3957 /* index is NULL if OBJF_READNOW. */
3958 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3959 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3967 /* Return the next matching CU or NULL if there are no more. */
3969 static struct dwarf2_per_cu_data
*
3970 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3972 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3974 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3976 offset_type cu_index_and_attrs
=
3977 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3978 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3979 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3980 /* This value is only valid for index versions >= 7. */
3981 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3982 gdb_index_symbol_kind symbol_kind
=
3983 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3984 /* Only check the symbol attributes if they're present.
3985 Indices prior to version 7 don't record them,
3986 and indices >= 7 may elide them for certain symbols
3987 (gold does this). */
3989 (dwarf2_per_objfile
->index_table
->version
>= 7
3990 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3992 /* Don't crash on bad data. */
3993 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3994 + dwarf2_per_objfile
->all_type_units
.size ()))
3996 complaint (_(".gdb_index entry has bad CU index"
3998 objfile_name (dwarf2_per_objfile
->objfile
));
4002 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
4004 /* Skip if already read in. */
4005 if (per_cu
->v
.quick
->compunit_symtab
)
4008 /* Check static vs global. */
4011 if (iter
->want_specific_block
4012 && want_static
!= is_static
)
4014 /* Work around gold/15646. */
4015 if (!is_static
&& iter
->global_seen
)
4018 iter
->global_seen
= 1;
4021 /* Only check the symbol's kind if it has one. */
4024 switch (iter
->domain
)
4027 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
4028 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
4029 /* Some types are also in VAR_DOMAIN. */
4030 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4034 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4038 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4053 static struct compunit_symtab
*
4054 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
4055 const char *name
, domain_enum domain
)
4057 struct compunit_symtab
*stab_best
= NULL
;
4058 struct dwarf2_per_objfile
*dwarf2_per_objfile
4059 = get_dwarf2_per_objfile (objfile
);
4061 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4063 struct dw2_symtab_iterator iter
;
4064 struct dwarf2_per_cu_data
*per_cu
;
4066 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 1, block_index
, domain
, name
);
4068 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4070 struct symbol
*sym
, *with_opaque
= NULL
;
4071 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
4072 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4073 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4075 sym
= block_find_symbol (block
, name
, domain
,
4076 block_find_non_opaque_type_preferred
,
4079 /* Some caution must be observed with overloaded functions
4080 and methods, since the index will not contain any overload
4081 information (but NAME might contain it). */
4084 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4086 if (with_opaque
!= NULL
4087 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4090 /* Keep looking through other CUs. */
4097 dw2_print_stats (struct objfile
*objfile
)
4099 struct dwarf2_per_objfile
*dwarf2_per_objfile
4100 = get_dwarf2_per_objfile (objfile
);
4101 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
4102 + dwarf2_per_objfile
->all_type_units
.size ());
4105 for (int i
= 0; i
< total
; ++i
)
4107 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4109 if (!per_cu
->v
.quick
->compunit_symtab
)
4112 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4113 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4116 /* This dumps minimal information about the index.
4117 It is called via "mt print objfiles".
4118 One use is to verify .gdb_index has been loaded by the
4119 gdb.dwarf2/gdb-index.exp testcase. */
4122 dw2_dump (struct objfile
*objfile
)
4124 struct dwarf2_per_objfile
*dwarf2_per_objfile
4125 = get_dwarf2_per_objfile (objfile
);
4127 gdb_assert (dwarf2_per_objfile
->using_index
);
4128 printf_filtered (".gdb_index:");
4129 if (dwarf2_per_objfile
->index_table
!= NULL
)
4131 printf_filtered (" version %d\n",
4132 dwarf2_per_objfile
->index_table
->version
);
4135 printf_filtered (" faked for \"readnow\"\n");
4136 printf_filtered ("\n");
4140 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4141 const char *func_name
)
4143 struct dwarf2_per_objfile
*dwarf2_per_objfile
4144 = get_dwarf2_per_objfile (objfile
);
4146 struct dw2_symtab_iterator iter
;
4147 struct dwarf2_per_cu_data
*per_cu
;
4149 /* Note: It doesn't matter what we pass for block_index here. */
4150 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4153 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4154 dw2_instantiate_symtab (per_cu
, false);
4159 dw2_expand_all_symtabs (struct objfile
*objfile
)
4161 struct dwarf2_per_objfile
*dwarf2_per_objfile
4162 = get_dwarf2_per_objfile (objfile
);
4163 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
4164 + dwarf2_per_objfile
->all_type_units
.size ());
4166 for (int i
= 0; i
< total_units
; ++i
)
4168 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4170 /* We don't want to directly expand a partial CU, because if we
4171 read it with the wrong language, then assertion failures can
4172 be triggered later on. See PR symtab/23010. So, tell
4173 dw2_instantiate_symtab to skip partial CUs -- any important
4174 partial CU will be read via DW_TAG_imported_unit anyway. */
4175 dw2_instantiate_symtab (per_cu
, true);
4180 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4181 const char *fullname
)
4183 struct dwarf2_per_objfile
*dwarf2_per_objfile
4184 = get_dwarf2_per_objfile (objfile
);
4186 /* We don't need to consider type units here.
4187 This is only called for examining code, e.g. expand_line_sal.
4188 There can be an order of magnitude (or more) more type units
4189 than comp units, and we avoid them if we can. */
4191 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4193 /* We only need to look at symtabs not already expanded. */
4194 if (per_cu
->v
.quick
->compunit_symtab
)
4197 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4198 if (file_data
== NULL
)
4201 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4203 const char *this_fullname
= file_data
->file_names
[j
];
4205 if (filename_cmp (this_fullname
, fullname
) == 0)
4207 dw2_instantiate_symtab (per_cu
, false);
4215 dw2_map_matching_symbols (struct objfile
*objfile
,
4216 const char * name
, domain_enum domain
,
4218 int (*callback
) (const struct block
*,
4219 struct symbol
*, void *),
4220 void *data
, symbol_name_match_type match
,
4221 symbol_compare_ftype
*ordered_compare
)
4223 /* Currently unimplemented; used for Ada. The function can be called if the
4224 current language is Ada for a non-Ada objfile using GNU index. As Ada
4225 does not look for non-Ada symbols this function should just return. */
4228 /* Symbol name matcher for .gdb_index names.
4230 Symbol names in .gdb_index have a few particularities:
4232 - There's no indication of which is the language of each symbol.
4234 Since each language has its own symbol name matching algorithm,
4235 and we don't know which language is the right one, we must match
4236 each symbol against all languages. This would be a potential
4237 performance problem if it were not mitigated by the
4238 mapped_index::name_components lookup table, which significantly
4239 reduces the number of times we need to call into this matcher,
4240 making it a non-issue.
4242 - Symbol names in the index have no overload (parameter)
4243 information. I.e., in C++, "foo(int)" and "foo(long)" both
4244 appear as "foo" in the index, for example.
4246 This means that the lookup names passed to the symbol name
4247 matcher functions must have no parameter information either
4248 because (e.g.) symbol search name "foo" does not match
4249 lookup-name "foo(int)" [while swapping search name for lookup
4252 class gdb_index_symbol_name_matcher
4255 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4256 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4258 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4259 Returns true if any matcher matches. */
4260 bool matches (const char *symbol_name
);
4263 /* A reference to the lookup name we're matching against. */
4264 const lookup_name_info
&m_lookup_name
;
4266 /* A vector holding all the different symbol name matchers, for all
4268 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4271 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4272 (const lookup_name_info
&lookup_name
)
4273 : m_lookup_name (lookup_name
)
4275 /* Prepare the vector of comparison functions upfront, to avoid
4276 doing the same work for each symbol. Care is taken to avoid
4277 matching with the same matcher more than once if/when multiple
4278 languages use the same matcher function. */
4279 auto &matchers
= m_symbol_name_matcher_funcs
;
4280 matchers
.reserve (nr_languages
);
4282 matchers
.push_back (default_symbol_name_matcher
);
4284 for (int i
= 0; i
< nr_languages
; i
++)
4286 const language_defn
*lang
= language_def ((enum language
) i
);
4287 symbol_name_matcher_ftype
*name_matcher
4288 = get_symbol_name_matcher (lang
, m_lookup_name
);
4290 /* Don't insert the same comparison routine more than once.
4291 Note that we do this linear walk instead of a seemingly
4292 cheaper sorted insert, or use a std::set or something like
4293 that, because relative order of function addresses is not
4294 stable. This is not a problem in practice because the number
4295 of supported languages is low, and the cost here is tiny
4296 compared to the number of searches we'll do afterwards using
4298 if (name_matcher
!= default_symbol_name_matcher
4299 && (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4300 == matchers
.end ()))
4301 matchers
.push_back (name_matcher
);
4306 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4308 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4309 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4315 /* Starting from a search name, return the string that finds the upper
4316 bound of all strings that start with SEARCH_NAME in a sorted name
4317 list. Returns the empty string to indicate that the upper bound is
4318 the end of the list. */
4321 make_sort_after_prefix_name (const char *search_name
)
4323 /* When looking to complete "func", we find the upper bound of all
4324 symbols that start with "func" by looking for where we'd insert
4325 the closest string that would follow "func" in lexicographical
4326 order. Usually, that's "func"-with-last-character-incremented,
4327 i.e. "fund". Mind non-ASCII characters, though. Usually those
4328 will be UTF-8 multi-byte sequences, but we can't be certain.
4329 Especially mind the 0xff character, which is a valid character in
4330 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4331 rule out compilers allowing it in identifiers. Note that
4332 conveniently, strcmp/strcasecmp are specified to compare
4333 characters interpreted as unsigned char. So what we do is treat
4334 the whole string as a base 256 number composed of a sequence of
4335 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4336 to 0, and carries 1 to the following more-significant position.
4337 If the very first character in SEARCH_NAME ends up incremented
4338 and carries/overflows, then the upper bound is the end of the
4339 list. The string after the empty string is also the empty
4342 Some examples of this operation:
4344 SEARCH_NAME => "+1" RESULT
4348 "\xff" "a" "\xff" => "\xff" "b"
4353 Then, with these symbols for example:
4359 completing "func" looks for symbols between "func" and
4360 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4361 which finds "func" and "func1", but not "fund".
4365 funcÿ (Latin1 'ÿ' [0xff])
4369 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4370 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4374 ÿÿ (Latin1 'ÿ' [0xff])
4377 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4378 the end of the list.
4380 std::string after
= search_name
;
4381 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4383 if (!after
.empty ())
4384 after
.back () = (unsigned char) after
.back () + 1;
4388 /* See declaration. */
4390 std::pair
<std::vector
<name_component
>::const_iterator
,
4391 std::vector
<name_component
>::const_iterator
>
4392 mapped_index_base::find_name_components_bounds
4393 (const lookup_name_info
&lookup_name_without_params
) const
4396 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4399 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4401 /* Comparison function object for lower_bound that matches against a
4402 given symbol name. */
4403 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4406 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4407 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4408 return name_cmp (elem_name
, name
) < 0;
4411 /* Comparison function object for upper_bound that matches against a
4412 given symbol name. */
4413 auto lookup_compare_upper
= [&] (const char *name
,
4414 const name_component
&elem
)
4416 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4417 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4418 return name_cmp (name
, elem_name
) < 0;
4421 auto begin
= this->name_components
.begin ();
4422 auto end
= this->name_components
.end ();
4424 /* Find the lower bound. */
4427 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4430 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4433 /* Find the upper bound. */
4436 if (lookup_name_without_params
.completion_mode ())
4438 /* In completion mode, we want UPPER to point past all
4439 symbols names that have the same prefix. I.e., with
4440 these symbols, and completing "func":
4442 function << lower bound
4444 other_function << upper bound
4446 We find the upper bound by looking for the insertion
4447 point of "func"-with-last-character-incremented,
4449 std::string after
= make_sort_after_prefix_name (cplus
);
4452 return std::lower_bound (lower
, end
, after
.c_str (),
4453 lookup_compare_lower
);
4456 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4459 return {lower
, upper
};
4462 /* See declaration. */
4465 mapped_index_base::build_name_components ()
4467 if (!this->name_components
.empty ())
4470 this->name_components_casing
= case_sensitivity
;
4472 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4474 /* The code below only knows how to break apart components of C++
4475 symbol names (and other languages that use '::' as
4476 namespace/module separator). If we add support for wild matching
4477 to some language that uses some other operator (E.g., Ada, Go and
4478 D use '.'), then we'll need to try splitting the symbol name
4479 according to that language too. Note that Ada does support wild
4480 matching, but doesn't currently support .gdb_index. */
4481 auto count
= this->symbol_name_count ();
4482 for (offset_type idx
= 0; idx
< count
; idx
++)
4484 if (this->symbol_name_slot_invalid (idx
))
4487 const char *name
= this->symbol_name_at (idx
);
4489 /* Add each name component to the name component table. */
4490 unsigned int previous_len
= 0;
4491 for (unsigned int current_len
= cp_find_first_component (name
);
4492 name
[current_len
] != '\0';
4493 current_len
+= cp_find_first_component (name
+ current_len
))
4495 gdb_assert (name
[current_len
] == ':');
4496 this->name_components
.push_back ({previous_len
, idx
});
4497 /* Skip the '::'. */
4499 previous_len
= current_len
;
4501 this->name_components
.push_back ({previous_len
, idx
});
4504 /* Sort name_components elements by name. */
4505 auto name_comp_compare
= [&] (const name_component
&left
,
4506 const name_component
&right
)
4508 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4509 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4511 const char *left_name
= left_qualified
+ left
.name_offset
;
4512 const char *right_name
= right_qualified
+ right
.name_offset
;
4514 return name_cmp (left_name
, right_name
) < 0;
4517 std::sort (this->name_components
.begin (),
4518 this->name_components
.end (),
4522 /* Helper for dw2_expand_symtabs_matching that works with a
4523 mapped_index_base instead of the containing objfile. This is split
4524 to a separate function in order to be able to unit test the
4525 name_components matching using a mock mapped_index_base. For each
4526 symbol name that matches, calls MATCH_CALLBACK, passing it the
4527 symbol's index in the mapped_index_base symbol table. */
4530 dw2_expand_symtabs_matching_symbol
4531 (mapped_index_base
&index
,
4532 const lookup_name_info
&lookup_name_in
,
4533 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4534 enum search_domain kind
,
4535 gdb::function_view
<void (offset_type
)> match_callback
)
4537 lookup_name_info lookup_name_without_params
4538 = lookup_name_in
.make_ignore_params ();
4539 gdb_index_symbol_name_matcher lookup_name_matcher
4540 (lookup_name_without_params
);
4542 /* Build the symbol name component sorted vector, if we haven't
4544 index
.build_name_components ();
4546 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4548 /* Now for each symbol name in range, check to see if we have a name
4549 match, and if so, call the MATCH_CALLBACK callback. */
4551 /* The same symbol may appear more than once in the range though.
4552 E.g., if we're looking for symbols that complete "w", and we have
4553 a symbol named "w1::w2", we'll find the two name components for
4554 that same symbol in the range. To be sure we only call the
4555 callback once per symbol, we first collect the symbol name
4556 indexes that matched in a temporary vector and ignore
4558 std::vector
<offset_type
> matches
;
4559 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4561 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4563 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4565 if (!lookup_name_matcher
.matches (qualified
)
4566 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4569 matches
.push_back (bounds
.first
->idx
);
4572 std::sort (matches
.begin (), matches
.end ());
4574 /* Finally call the callback, once per match. */
4576 for (offset_type idx
: matches
)
4580 match_callback (idx
);
4585 /* Above we use a type wider than idx's for 'prev', since 0 and
4586 (offset_type)-1 are both possible values. */
4587 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4592 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4594 /* A mock .gdb_index/.debug_names-like name index table, enough to
4595 exercise dw2_expand_symtabs_matching_symbol, which works with the
4596 mapped_index_base interface. Builds an index from the symbol list
4597 passed as parameter to the constructor. */
4598 class mock_mapped_index
: public mapped_index_base
4601 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4602 : m_symbol_table (symbols
)
4605 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4607 /* Return the number of names in the symbol table. */
4608 size_t symbol_name_count () const override
4610 return m_symbol_table
.size ();
4613 /* Get the name of the symbol at IDX in the symbol table. */
4614 const char *symbol_name_at (offset_type idx
) const override
4616 return m_symbol_table
[idx
];
4620 gdb::array_view
<const char *> m_symbol_table
;
4623 /* Convenience function that converts a NULL pointer to a "<null>"
4624 string, to pass to print routines. */
4627 string_or_null (const char *str
)
4629 return str
!= NULL
? str
: "<null>";
4632 /* Check if a lookup_name_info built from
4633 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4634 index. EXPECTED_LIST is the list of expected matches, in expected
4635 matching order. If no match expected, then an empty list is
4636 specified. Returns true on success. On failure prints a warning
4637 indicating the file:line that failed, and returns false. */
4640 check_match (const char *file
, int line
,
4641 mock_mapped_index
&mock_index
,
4642 const char *name
, symbol_name_match_type match_type
,
4643 bool completion_mode
,
4644 std::initializer_list
<const char *> expected_list
)
4646 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4648 bool matched
= true;
4650 auto mismatch
= [&] (const char *expected_str
,
4653 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4654 "expected=\"%s\", got=\"%s\"\n"),
4656 (match_type
== symbol_name_match_type::FULL
4658 name
, string_or_null (expected_str
), string_or_null (got
));
4662 auto expected_it
= expected_list
.begin ();
4663 auto expected_end
= expected_list
.end ();
4665 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4667 [&] (offset_type idx
)
4669 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4670 const char *expected_str
4671 = expected_it
== expected_end
? NULL
: *expected_it
++;
4673 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4674 mismatch (expected_str
, matched_name
);
4677 const char *expected_str
4678 = expected_it
== expected_end
? NULL
: *expected_it
++;
4679 if (expected_str
!= NULL
)
4680 mismatch (expected_str
, NULL
);
4685 /* The symbols added to the mock mapped_index for testing (in
4687 static const char *test_symbols
[] = {
4696 "ns2::tmpl<int>::foo2",
4697 "(anonymous namespace)::A::B::C",
4699 /* These are used to check that the increment-last-char in the
4700 matching algorithm for completion doesn't match "t1_fund" when
4701 completing "t1_func". */
4707 /* A UTF-8 name with multi-byte sequences to make sure that
4708 cp-name-parser understands this as a single identifier ("função"
4709 is "function" in PT). */
4712 /* \377 (0xff) is Latin1 'ÿ'. */
4715 /* \377 (0xff) is Latin1 'ÿ'. */
4719 /* A name with all sorts of complications. Starts with "z" to make
4720 it easier for the completion tests below. */
4721 #define Z_SYM_NAME \
4722 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4723 "::tuple<(anonymous namespace)::ui*, " \
4724 "std::default_delete<(anonymous namespace)::ui>, void>"
4729 /* Returns true if the mapped_index_base::find_name_component_bounds
4730 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4731 in completion mode. */
4734 check_find_bounds_finds (mapped_index_base
&index
,
4735 const char *search_name
,
4736 gdb::array_view
<const char *> expected_syms
)
4738 lookup_name_info
lookup_name (search_name
,
4739 symbol_name_match_type::FULL
, true);
4741 auto bounds
= index
.find_name_components_bounds (lookup_name
);
4743 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4744 if (distance
!= expected_syms
.size ())
4747 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4749 auto nc_elem
= bounds
.first
+ exp_elem
;
4750 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4751 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4758 /* Test the lower-level mapped_index::find_name_component_bounds
4762 test_mapped_index_find_name_component_bounds ()
4764 mock_mapped_index
mock_index (test_symbols
);
4766 mock_index
.build_name_components ();
4768 /* Test the lower-level mapped_index::find_name_component_bounds
4769 method in completion mode. */
4771 static const char *expected_syms
[] = {
4776 SELF_CHECK (check_find_bounds_finds (mock_index
,
4777 "t1_func", expected_syms
));
4780 /* Check that the increment-last-char in the name matching algorithm
4781 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4783 static const char *expected_syms1
[] = {
4787 SELF_CHECK (check_find_bounds_finds (mock_index
,
4788 "\377", expected_syms1
));
4790 static const char *expected_syms2
[] = {
4793 SELF_CHECK (check_find_bounds_finds (mock_index
,
4794 "\377\377", expected_syms2
));
4798 /* Test dw2_expand_symtabs_matching_symbol. */
4801 test_dw2_expand_symtabs_matching_symbol ()
4803 mock_mapped_index
mock_index (test_symbols
);
4805 /* We let all tests run until the end even if some fails, for debug
4807 bool any_mismatch
= false;
4809 /* Create the expected symbols list (an initializer_list). Needed
4810 because lists have commas, and we need to pass them to CHECK,
4811 which is a macro. */
4812 #define EXPECT(...) { __VA_ARGS__ }
4814 /* Wrapper for check_match that passes down the current
4815 __FILE__/__LINE__. */
4816 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4817 any_mismatch |= !check_match (__FILE__, __LINE__, \
4819 NAME, MATCH_TYPE, COMPLETION_MODE, \
4822 /* Identity checks. */
4823 for (const char *sym
: test_symbols
)
4825 /* Should be able to match all existing symbols. */
4826 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4829 /* Should be able to match all existing symbols with
4831 std::string with_params
= std::string (sym
) + "(int)";
4832 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4835 /* Should be able to match all existing symbols with
4836 parameters and qualifiers. */
4837 with_params
= std::string (sym
) + " ( int ) const";
4838 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4841 /* This should really find sym, but cp-name-parser.y doesn't
4842 know about lvalue/rvalue qualifiers yet. */
4843 with_params
= std::string (sym
) + " ( int ) &&";
4844 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4848 /* Check that the name matching algorithm for completion doesn't get
4849 confused with Latin1 'ÿ' / 0xff. */
4851 static const char str
[] = "\377";
4852 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4853 EXPECT ("\377", "\377\377123"));
4856 /* Check that the increment-last-char in the matching algorithm for
4857 completion doesn't match "t1_fund" when completing "t1_func". */
4859 static const char str
[] = "t1_func";
4860 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4861 EXPECT ("t1_func", "t1_func1"));
4864 /* Check that completion mode works at each prefix of the expected
4867 static const char str
[] = "function(int)";
4868 size_t len
= strlen (str
);
4871 for (size_t i
= 1; i
< len
; i
++)
4873 lookup
.assign (str
, i
);
4874 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4875 EXPECT ("function"));
4879 /* While "w" is a prefix of both components, the match function
4880 should still only be called once. */
4882 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4884 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4888 /* Same, with a "complicated" symbol. */
4890 static const char str
[] = Z_SYM_NAME
;
4891 size_t len
= strlen (str
);
4894 for (size_t i
= 1; i
< len
; i
++)
4896 lookup
.assign (str
, i
);
4897 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4898 EXPECT (Z_SYM_NAME
));
4902 /* In FULL mode, an incomplete symbol doesn't match. */
4904 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4908 /* A complete symbol with parameters matches any overload, since the
4909 index has no overload info. */
4911 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4912 EXPECT ("std::zfunction", "std::zfunction2"));
4913 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4914 EXPECT ("std::zfunction", "std::zfunction2"));
4915 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4916 EXPECT ("std::zfunction", "std::zfunction2"));
4919 /* Check that whitespace is ignored appropriately. A symbol with a
4920 template argument list. */
4922 static const char expected
[] = "ns::foo<int>";
4923 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4925 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4929 /* Check that whitespace is ignored appropriately. A symbol with a
4930 template argument list that includes a pointer. */
4932 static const char expected
[] = "ns::foo<char*>";
4933 /* Try both completion and non-completion modes. */
4934 static const bool completion_mode
[2] = {false, true};
4935 for (size_t i
= 0; i
< 2; i
++)
4937 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4938 completion_mode
[i
], EXPECT (expected
));
4939 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4940 completion_mode
[i
], EXPECT (expected
));
4942 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4943 completion_mode
[i
], EXPECT (expected
));
4944 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4945 completion_mode
[i
], EXPECT (expected
));
4950 /* Check method qualifiers are ignored. */
4951 static const char expected
[] = "ns::foo<char*>";
4952 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4953 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4954 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4955 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4956 CHECK_MATCH ("foo < char * > ( int ) const",
4957 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4958 CHECK_MATCH ("foo < char * > ( int ) &&",
4959 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4962 /* Test lookup names that don't match anything. */
4964 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4967 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4971 /* Some wild matching tests, exercising "(anonymous namespace)",
4972 which should not be confused with a parameter list. */
4974 static const char *syms
[] = {
4978 "A :: B :: C ( int )",
4983 for (const char *s
: syms
)
4985 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4986 EXPECT ("(anonymous namespace)::A::B::C"));
4991 static const char expected
[] = "ns2::tmpl<int>::foo2";
4992 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4994 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4998 SELF_CHECK (!any_mismatch
);
5007 test_mapped_index_find_name_component_bounds ();
5008 test_dw2_expand_symtabs_matching_symbol ();
5011 }} // namespace selftests::dw2_expand_symtabs_matching
5013 #endif /* GDB_SELF_TEST */
5015 /* If FILE_MATCHER is NULL or if PER_CU has
5016 dwarf2_per_cu_quick_data::MARK set (see
5017 dw_expand_symtabs_matching_file_matcher), expand the CU and call
5018 EXPANSION_NOTIFY on it. */
5021 dw2_expand_symtabs_matching_one
5022 (struct dwarf2_per_cu_data
*per_cu
,
5023 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5024 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
5026 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
5028 bool symtab_was_null
5029 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
5031 dw2_instantiate_symtab (per_cu
, false);
5033 if (expansion_notify
!= NULL
5035 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5036 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5040 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5041 matched, to expand corresponding CUs that were marked. IDX is the
5042 index of the symbol name that matched. */
5045 dw2_expand_marked_cus
5046 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5047 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5048 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5051 offset_type
*vec
, vec_len
, vec_idx
;
5052 bool global_seen
= false;
5053 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5055 vec
= (offset_type
*) (index
.constant_pool
5056 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5057 vec_len
= MAYBE_SWAP (vec
[0]);
5058 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5060 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5061 /* This value is only valid for index versions >= 7. */
5062 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5063 gdb_index_symbol_kind symbol_kind
=
5064 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5065 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5066 /* Only check the symbol attributes if they're present.
5067 Indices prior to version 7 don't record them,
5068 and indices >= 7 may elide them for certain symbols
5069 (gold does this). */
5072 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5074 /* Work around gold/15646. */
5077 if (!is_static
&& global_seen
)
5083 /* Only check the symbol's kind if it has one. */
5088 case VARIABLES_DOMAIN
:
5089 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5092 case FUNCTIONS_DOMAIN
:
5093 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5097 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5105 /* Don't crash on bad data. */
5106 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
5107 + dwarf2_per_objfile
->all_type_units
.size ()))
5109 complaint (_(".gdb_index entry has bad CU index"
5111 objfile_name (dwarf2_per_objfile
->objfile
));
5115 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
5116 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5121 /* If FILE_MATCHER is non-NULL, set all the
5122 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5123 that match FILE_MATCHER. */
5126 dw_expand_symtabs_matching_file_matcher
5127 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5128 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5130 if (file_matcher
== NULL
)
5133 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5135 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5137 NULL
, xcalloc
, xfree
));
5138 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5140 NULL
, xcalloc
, xfree
));
5142 /* The rule is CUs specify all the files, including those used by
5143 any TU, so there's no need to scan TUs here. */
5145 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5149 per_cu
->v
.quick
->mark
= 0;
5151 /* We only need to look at symtabs not already expanded. */
5152 if (per_cu
->v
.quick
->compunit_symtab
)
5155 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5156 if (file_data
== NULL
)
5159 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5161 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5163 per_cu
->v
.quick
->mark
= 1;
5167 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5169 const char *this_real_name
;
5171 if (file_matcher (file_data
->file_names
[j
], false))
5173 per_cu
->v
.quick
->mark
= 1;
5177 /* Before we invoke realpath, which can get expensive when many
5178 files are involved, do a quick comparison of the basenames. */
5179 if (!basenames_may_differ
5180 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5184 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5185 if (file_matcher (this_real_name
, false))
5187 per_cu
->v
.quick
->mark
= 1;
5192 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
5193 ? visited_found
.get ()
5194 : visited_not_found
.get (),
5201 dw2_expand_symtabs_matching
5202 (struct objfile
*objfile
,
5203 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5204 const lookup_name_info
&lookup_name
,
5205 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5206 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5207 enum search_domain kind
)
5209 struct dwarf2_per_objfile
*dwarf2_per_objfile
5210 = get_dwarf2_per_objfile (objfile
);
5212 /* index_table is NULL if OBJF_READNOW. */
5213 if (!dwarf2_per_objfile
->index_table
)
5216 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5218 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5220 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5222 kind
, [&] (offset_type idx
)
5224 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5225 expansion_notify
, kind
);
5229 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5232 static struct compunit_symtab
*
5233 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5238 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5239 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5242 if (cust
->includes
== NULL
)
5245 for (i
= 0; cust
->includes
[i
]; ++i
)
5247 struct compunit_symtab
*s
= cust
->includes
[i
];
5249 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5257 static struct compunit_symtab
*
5258 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5259 struct bound_minimal_symbol msymbol
,
5261 struct obj_section
*section
,
5264 struct dwarf2_per_cu_data
*data
;
5265 struct compunit_symtab
*result
;
5267 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
5270 CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
5271 SECT_OFF_TEXT (objfile
));
5272 data
= (struct dwarf2_per_cu_data
*) addrmap_find
5273 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
5277 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5278 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5279 paddress (get_objfile_arch (objfile
), pc
));
5282 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
5285 gdb_assert (result
!= NULL
);
5290 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5291 void *data
, int need_fullname
)
5293 struct dwarf2_per_objfile
*dwarf2_per_objfile
5294 = get_dwarf2_per_objfile (objfile
);
5296 if (!dwarf2_per_objfile
->filenames_cache
)
5298 dwarf2_per_objfile
->filenames_cache
.emplace ();
5300 htab_up
visited (htab_create_alloc (10,
5301 htab_hash_pointer
, htab_eq_pointer
,
5302 NULL
, xcalloc
, xfree
));
5304 /* The rule is CUs specify all the files, including those used
5305 by any TU, so there's no need to scan TUs here. We can
5306 ignore file names coming from already-expanded CUs. */
5308 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5310 if (per_cu
->v
.quick
->compunit_symtab
)
5312 void **slot
= htab_find_slot (visited
.get (),
5313 per_cu
->v
.quick
->file_names
,
5316 *slot
= per_cu
->v
.quick
->file_names
;
5320 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5322 /* We only need to look at symtabs not already expanded. */
5323 if (per_cu
->v
.quick
->compunit_symtab
)
5326 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5327 if (file_data
== NULL
)
5330 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5333 /* Already visited. */
5338 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5340 const char *filename
= file_data
->file_names
[j
];
5341 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5346 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5348 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5351 this_real_name
= gdb_realpath (filename
);
5352 (*fun
) (filename
, this_real_name
.get (), data
);
5357 dw2_has_symbols (struct objfile
*objfile
)
5362 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5365 dw2_find_last_source_symtab
,
5366 dw2_forget_cached_source_info
,
5367 dw2_map_symtabs_matching_filename
,
5371 dw2_expand_symtabs_for_function
,
5372 dw2_expand_all_symtabs
,
5373 dw2_expand_symtabs_with_fullname
,
5374 dw2_map_matching_symbols
,
5375 dw2_expand_symtabs_matching
,
5376 dw2_find_pc_sect_compunit_symtab
,
5378 dw2_map_symbol_filenames
5381 /* DWARF-5 debug_names reader. */
5383 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5384 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5386 /* A helper function that reads the .debug_names section in SECTION
5387 and fills in MAP. FILENAME is the name of the file containing the
5388 section; it is used for error reporting.
5390 Returns true if all went well, false otherwise. */
5393 read_debug_names_from_section (struct objfile
*objfile
,
5394 const char *filename
,
5395 struct dwarf2_section_info
*section
,
5396 mapped_debug_names
&map
)
5398 if (dwarf2_section_empty_p (section
))
5401 /* Older elfutils strip versions could keep the section in the main
5402 executable while splitting it for the separate debug info file. */
5403 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5406 dwarf2_read_section (objfile
, section
);
5408 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5410 const gdb_byte
*addr
= section
->buffer
;
5412 bfd
*const abfd
= get_section_bfd_owner (section
);
5414 unsigned int bytes_read
;
5415 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5418 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5419 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5420 if (bytes_read
+ length
!= section
->size
)
5422 /* There may be multiple per-CU indices. */
5423 warning (_("Section .debug_names in %s length %s does not match "
5424 "section length %s, ignoring .debug_names."),
5425 filename
, plongest (bytes_read
+ length
),
5426 pulongest (section
->size
));
5430 /* The version number. */
5431 uint16_t version
= read_2_bytes (abfd
, addr
);
5435 warning (_("Section .debug_names in %s has unsupported version %d, "
5436 "ignoring .debug_names."),
5442 uint16_t padding
= read_2_bytes (abfd
, addr
);
5446 warning (_("Section .debug_names in %s has unsupported padding %d, "
5447 "ignoring .debug_names."),
5452 /* comp_unit_count - The number of CUs in the CU list. */
5453 map
.cu_count
= read_4_bytes (abfd
, addr
);
5456 /* local_type_unit_count - The number of TUs in the local TU
5458 map
.tu_count
= read_4_bytes (abfd
, addr
);
5461 /* foreign_type_unit_count - The number of TUs in the foreign TU
5463 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5465 if (foreign_tu_count
!= 0)
5467 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5468 "ignoring .debug_names."),
5469 filename
, static_cast<unsigned long> (foreign_tu_count
));
5473 /* bucket_count - The number of hash buckets in the hash lookup
5475 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5478 /* name_count - The number of unique names in the index. */
5479 map
.name_count
= read_4_bytes (abfd
, addr
);
5482 /* abbrev_table_size - The size in bytes of the abbreviations
5484 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5487 /* augmentation_string_size - The size in bytes of the augmentation
5488 string. This value is rounded up to a multiple of 4. */
5489 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5491 map
.augmentation_is_gdb
= ((augmentation_string_size
5492 == sizeof (dwarf5_augmentation
))
5493 && memcmp (addr
, dwarf5_augmentation
,
5494 sizeof (dwarf5_augmentation
)) == 0);
5495 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5496 addr
+= augmentation_string_size
;
5499 map
.cu_table_reordered
= addr
;
5500 addr
+= map
.cu_count
* map
.offset_size
;
5502 /* List of Local TUs */
5503 map
.tu_table_reordered
= addr
;
5504 addr
+= map
.tu_count
* map
.offset_size
;
5506 /* Hash Lookup Table */
5507 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5508 addr
+= map
.bucket_count
* 4;
5509 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5510 addr
+= map
.name_count
* 4;
5513 map
.name_table_string_offs_reordered
= addr
;
5514 addr
+= map
.name_count
* map
.offset_size
;
5515 map
.name_table_entry_offs_reordered
= addr
;
5516 addr
+= map
.name_count
* map
.offset_size
;
5518 const gdb_byte
*abbrev_table_start
= addr
;
5521 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5526 const auto insertpair
5527 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5528 if (!insertpair
.second
)
5530 warning (_("Section .debug_names in %s has duplicate index %s, "
5531 "ignoring .debug_names."),
5532 filename
, pulongest (index_num
));
5535 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5536 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5541 mapped_debug_names::index_val::attr attr
;
5542 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5544 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5546 if (attr
.form
== DW_FORM_implicit_const
)
5548 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5552 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5554 indexval
.attr_vec
.push_back (std::move (attr
));
5557 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5559 warning (_("Section .debug_names in %s has abbreviation_table "
5560 "of size %zu vs. written as %u, ignoring .debug_names."),
5561 filename
, addr
- abbrev_table_start
, abbrev_table_size
);
5564 map
.entry_pool
= addr
;
5569 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5573 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5574 const mapped_debug_names
&map
,
5575 dwarf2_section_info
§ion
,
5578 sect_offset sect_off_prev
;
5579 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5581 sect_offset sect_off_next
;
5582 if (i
< map
.cu_count
)
5585 = (sect_offset
) (extract_unsigned_integer
5586 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5588 map
.dwarf5_byte_order
));
5591 sect_off_next
= (sect_offset
) section
.size
;
5594 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5595 dwarf2_per_cu_data
*per_cu
5596 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5597 sect_off_prev
, length
);
5598 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5600 sect_off_prev
= sect_off_next
;
5604 /* Read the CU list from the mapped index, and use it to create all
5605 the CU objects for this dwarf2_per_objfile. */
5608 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5609 const mapped_debug_names
&map
,
5610 const mapped_debug_names
&dwz_map
)
5612 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5613 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5615 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5616 dwarf2_per_objfile
->info
,
5617 false /* is_dwz */);
5619 if (dwz_map
.cu_count
== 0)
5622 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5623 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5627 /* Read .debug_names. If everything went ok, initialize the "quick"
5628 elements of all the CUs and return true. Otherwise, return false. */
5631 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5633 std::unique_ptr
<mapped_debug_names
> map
5634 (new mapped_debug_names (dwarf2_per_objfile
));
5635 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5636 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5638 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5639 &dwarf2_per_objfile
->debug_names
,
5643 /* Don't use the index if it's empty. */
5644 if (map
->name_count
== 0)
5647 /* If there is a .dwz file, read it so we can get its CU list as
5649 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5652 if (!read_debug_names_from_section (objfile
,
5653 bfd_get_filename (dwz
->dwz_bfd
),
5654 &dwz
->debug_names
, dwz_map
))
5656 warning (_("could not read '.debug_names' section from %s; skipping"),
5657 bfd_get_filename (dwz
->dwz_bfd
));
5662 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5664 if (map
->tu_count
!= 0)
5666 /* We can only handle a single .debug_types when we have an
5668 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
5671 dwarf2_section_info
*section
= VEC_index (dwarf2_section_info_def
,
5672 dwarf2_per_objfile
->types
, 0);
5674 create_signatured_type_table_from_debug_names
5675 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5678 create_addrmap_from_aranges (dwarf2_per_objfile
,
5679 &dwarf2_per_objfile
->debug_aranges
);
5681 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5682 dwarf2_per_objfile
->using_index
= 1;
5683 dwarf2_per_objfile
->quick_file_names_table
=
5684 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5689 /* Type used to manage iterating over all CUs looking for a symbol for
5692 class dw2_debug_names_iterator
5695 /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block
5696 BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
5697 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5698 bool want_specific_block
,
5699 block_enum block_index
, domain_enum domain
,
5701 : m_map (map
), m_want_specific_block (want_specific_block
),
5702 m_block_index (block_index
), m_domain (domain
),
5703 m_addr (find_vec_in_debug_names (map
, name
))
5706 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5707 search_domain search
, uint32_t namei
)
5710 m_addr (find_vec_in_debug_names (map
, namei
))
5713 /* Return the next matching CU or NULL if there are no more. */
5714 dwarf2_per_cu_data
*next ();
5717 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5719 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5722 /* The internalized form of .debug_names. */
5723 const mapped_debug_names
&m_map
;
5725 /* If true, only look for symbols that match BLOCK_INDEX. */
5726 const bool m_want_specific_block
= false;
5728 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
5729 Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid
5731 const block_enum m_block_index
= FIRST_LOCAL_BLOCK
;
5733 /* The kind of symbol we're looking for. */
5734 const domain_enum m_domain
= UNDEF_DOMAIN
;
5735 const search_domain m_search
= ALL_DOMAIN
;
5737 /* The list of CUs from the index entry of the symbol, or NULL if
5739 const gdb_byte
*m_addr
;
5743 mapped_debug_names::namei_to_name (uint32_t namei
) const
5745 const ULONGEST namei_string_offs
5746 = extract_unsigned_integer ((name_table_string_offs_reordered
5747 + namei
* offset_size
),
5750 return read_indirect_string_at_offset
5751 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5754 /* Find a slot in .debug_names for the object named NAME. If NAME is
5755 found, return pointer to its pool data. If NAME cannot be found,
5759 dw2_debug_names_iterator::find_vec_in_debug_names
5760 (const mapped_debug_names
&map
, const char *name
)
5762 int (*cmp
) (const char *, const char *);
5764 if (current_language
->la_language
== language_cplus
5765 || current_language
->la_language
== language_fortran
5766 || current_language
->la_language
== language_d
)
5768 /* NAME is already canonical. Drop any qualifiers as
5769 .debug_names does not contain any. */
5771 if (strchr (name
, '(') != NULL
)
5773 gdb::unique_xmalloc_ptr
<char> without_params
5774 = cp_remove_params (name
);
5776 if (without_params
!= NULL
)
5778 name
= without_params
.get();
5783 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5785 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5787 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5788 (map
.bucket_table_reordered
5789 + (full_hash
% map
.bucket_count
)), 4,
5790 map
.dwarf5_byte_order
);
5794 if (namei
>= map
.name_count
)
5796 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5798 namei
, map
.name_count
,
5799 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5805 const uint32_t namei_full_hash
5806 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5807 (map
.hash_table_reordered
+ namei
), 4,
5808 map
.dwarf5_byte_order
);
5809 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5812 if (full_hash
== namei_full_hash
)
5814 const char *const namei_string
= map
.namei_to_name (namei
);
5816 #if 0 /* An expensive sanity check. */
5817 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5819 complaint (_("Wrong .debug_names hash for string at index %u "
5821 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5826 if (cmp (namei_string
, name
) == 0)
5828 const ULONGEST namei_entry_offs
5829 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5830 + namei
* map
.offset_size
),
5831 map
.offset_size
, map
.dwarf5_byte_order
);
5832 return map
.entry_pool
+ namei_entry_offs
;
5837 if (namei
>= map
.name_count
)
5843 dw2_debug_names_iterator::find_vec_in_debug_names
5844 (const mapped_debug_names
&map
, uint32_t namei
)
5846 if (namei
>= map
.name_count
)
5848 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5850 namei
, map
.name_count
,
5851 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5855 const ULONGEST namei_entry_offs
5856 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5857 + namei
* map
.offset_size
),
5858 map
.offset_size
, map
.dwarf5_byte_order
);
5859 return map
.entry_pool
+ namei_entry_offs
;
5862 /* See dw2_debug_names_iterator. */
5864 dwarf2_per_cu_data
*
5865 dw2_debug_names_iterator::next ()
5870 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5871 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5872 bfd
*const abfd
= objfile
->obfd
;
5876 unsigned int bytes_read
;
5877 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5878 m_addr
+= bytes_read
;
5882 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5883 if (indexval_it
== m_map
.abbrev_map
.cend ())
5885 complaint (_("Wrong .debug_names undefined abbrev code %s "
5887 pulongest (abbrev
), objfile_name (objfile
));
5890 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5891 bool have_is_static
= false;
5893 dwarf2_per_cu_data
*per_cu
= NULL
;
5894 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5899 case DW_FORM_implicit_const
:
5900 ull
= attr
.implicit_const
;
5902 case DW_FORM_flag_present
:
5906 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5907 m_addr
+= bytes_read
;
5910 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5911 dwarf_form_name (attr
.form
),
5912 objfile_name (objfile
));
5915 switch (attr
.dw_idx
)
5917 case DW_IDX_compile_unit
:
5918 /* Don't crash on bad data. */
5919 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5921 complaint (_(".debug_names entry has bad CU index %s"
5924 objfile_name (dwarf2_per_objfile
->objfile
));
5927 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5929 case DW_IDX_type_unit
:
5930 /* Don't crash on bad data. */
5931 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5933 complaint (_(".debug_names entry has bad TU index %s"
5936 objfile_name (dwarf2_per_objfile
->objfile
));
5939 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5941 case DW_IDX_GNU_internal
:
5942 if (!m_map
.augmentation_is_gdb
)
5944 have_is_static
= true;
5947 case DW_IDX_GNU_external
:
5948 if (!m_map
.augmentation_is_gdb
)
5950 have_is_static
= true;
5956 /* Skip if already read in. */
5957 if (per_cu
->v
.quick
->compunit_symtab
)
5960 /* Check static vs global. */
5963 const bool want_static
= m_block_index
!= GLOBAL_BLOCK
;
5964 if (m_want_specific_block
&& want_static
!= is_static
)
5968 /* Match dw2_symtab_iter_next, symbol_kind
5969 and debug_names::psymbol_tag. */
5973 switch (indexval
.dwarf_tag
)
5975 case DW_TAG_variable
:
5976 case DW_TAG_subprogram
:
5977 /* Some types are also in VAR_DOMAIN. */
5978 case DW_TAG_typedef
:
5979 case DW_TAG_structure_type
:
5986 switch (indexval
.dwarf_tag
)
5988 case DW_TAG_typedef
:
5989 case DW_TAG_structure_type
:
5996 switch (indexval
.dwarf_tag
)
5999 case DW_TAG_variable
:
6009 /* Match dw2_expand_symtabs_matching, symbol_kind and
6010 debug_names::psymbol_tag. */
6013 case VARIABLES_DOMAIN
:
6014 switch (indexval
.dwarf_tag
)
6016 case DW_TAG_variable
:
6022 case FUNCTIONS_DOMAIN
:
6023 switch (indexval
.dwarf_tag
)
6025 case DW_TAG_subprogram
:
6032 switch (indexval
.dwarf_tag
)
6034 case DW_TAG_typedef
:
6035 case DW_TAG_structure_type
:
6048 static struct compunit_symtab
*
6049 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, int block_index_int
,
6050 const char *name
, domain_enum domain
)
6052 const block_enum block_index
= static_cast<block_enum
> (block_index_int
);
6053 struct dwarf2_per_objfile
*dwarf2_per_objfile
6054 = get_dwarf2_per_objfile (objfile
);
6056 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6059 /* index is NULL if OBJF_READNOW. */
6062 const auto &map
= *mapp
;
6064 dw2_debug_names_iterator
iter (map
, true /* want_specific_block */,
6065 block_index
, domain
, name
);
6067 struct compunit_symtab
*stab_best
= NULL
;
6068 struct dwarf2_per_cu_data
*per_cu
;
6069 while ((per_cu
= iter
.next ()) != NULL
)
6071 struct symbol
*sym
, *with_opaque
= NULL
;
6072 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
6073 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6074 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6076 sym
= block_find_symbol (block
, name
, domain
,
6077 block_find_non_opaque_type_preferred
,
6080 /* Some caution must be observed with overloaded functions and
6081 methods, since the index will not contain any overload
6082 information (but NAME might contain it). */
6085 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6087 if (with_opaque
!= NULL
6088 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6091 /* Keep looking through other CUs. */
6097 /* This dumps minimal information about .debug_names. It is called
6098 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6099 uses this to verify that .debug_names has been loaded. */
6102 dw2_debug_names_dump (struct objfile
*objfile
)
6104 struct dwarf2_per_objfile
*dwarf2_per_objfile
6105 = get_dwarf2_per_objfile (objfile
);
6107 gdb_assert (dwarf2_per_objfile
->using_index
);
6108 printf_filtered (".debug_names:");
6109 if (dwarf2_per_objfile
->debug_names_table
)
6110 printf_filtered (" exists\n");
6112 printf_filtered (" faked for \"readnow\"\n");
6113 printf_filtered ("\n");
6117 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6118 const char *func_name
)
6120 struct dwarf2_per_objfile
*dwarf2_per_objfile
6121 = get_dwarf2_per_objfile (objfile
);
6123 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6124 if (dwarf2_per_objfile
->debug_names_table
)
6126 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6128 /* Note: It doesn't matter what we pass for block_index here. */
6129 dw2_debug_names_iterator
iter (map
, false /* want_specific_block */,
6130 GLOBAL_BLOCK
, VAR_DOMAIN
, func_name
);
6132 struct dwarf2_per_cu_data
*per_cu
;
6133 while ((per_cu
= iter
.next ()) != NULL
)
6134 dw2_instantiate_symtab (per_cu
, false);
6139 dw2_debug_names_expand_symtabs_matching
6140 (struct objfile
*objfile
,
6141 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6142 const lookup_name_info
&lookup_name
,
6143 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6144 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6145 enum search_domain kind
)
6147 struct dwarf2_per_objfile
*dwarf2_per_objfile
6148 = get_dwarf2_per_objfile (objfile
);
6150 /* debug_names_table is NULL if OBJF_READNOW. */
6151 if (!dwarf2_per_objfile
->debug_names_table
)
6154 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6156 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6158 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6160 kind
, [&] (offset_type namei
)
6162 /* The name was matched, now expand corresponding CUs that were
6164 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6166 struct dwarf2_per_cu_data
*per_cu
;
6167 while ((per_cu
= iter
.next ()) != NULL
)
6168 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6173 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6176 dw2_find_last_source_symtab
,
6177 dw2_forget_cached_source_info
,
6178 dw2_map_symtabs_matching_filename
,
6179 dw2_debug_names_lookup_symbol
,
6181 dw2_debug_names_dump
,
6182 dw2_debug_names_expand_symtabs_for_function
,
6183 dw2_expand_all_symtabs
,
6184 dw2_expand_symtabs_with_fullname
,
6185 dw2_map_matching_symbols
,
6186 dw2_debug_names_expand_symtabs_matching
,
6187 dw2_find_pc_sect_compunit_symtab
,
6189 dw2_map_symbol_filenames
6192 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
6193 to either a dwarf2_per_objfile or dwz_file object. */
6195 template <typename T
>
6196 static gdb::array_view
<const gdb_byte
>
6197 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
6199 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
6201 if (dwarf2_section_empty_p (section
))
6204 /* Older elfutils strip versions could keep the section in the main
6205 executable while splitting it for the separate debug info file. */
6206 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
6209 dwarf2_read_section (obj
, section
);
6211 /* dwarf2_section_info::size is a bfd_size_type, while
6212 gdb::array_view works with size_t. On 32-bit hosts, with
6213 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
6214 is 32-bit. So we need an explicit narrowing conversion here.
6215 This is fine, because it's impossible to allocate or mmap an
6216 array/buffer larger than what size_t can represent. */
6217 return gdb::make_array_view (section
->buffer
, section
->size
);
6220 /* Lookup the index cache for the contents of the index associated to
6223 static gdb::array_view
<const gdb_byte
>
6224 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
6226 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
6227 if (build_id
== nullptr)
6230 return global_index_cache
.lookup_gdb_index (build_id
,
6231 &dwarf2_obj
->index_cache_res
);
6234 /* Same as the above, but for DWZ. */
6236 static gdb::array_view
<const gdb_byte
>
6237 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
6239 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
6240 if (build_id
== nullptr)
6243 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
6246 /* See symfile.h. */
6249 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6251 struct dwarf2_per_objfile
*dwarf2_per_objfile
6252 = get_dwarf2_per_objfile (objfile
);
6254 /* If we're about to read full symbols, don't bother with the
6255 indices. In this case we also don't care if some other debug
6256 format is making psymtabs, because they are all about to be
6258 if ((objfile
->flags
& OBJF_READNOW
))
6260 dwarf2_per_objfile
->using_index
= 1;
6261 create_all_comp_units (dwarf2_per_objfile
);
6262 create_all_type_units (dwarf2_per_objfile
);
6263 dwarf2_per_objfile
->quick_file_names_table
6264 = create_quick_file_names_table
6265 (dwarf2_per_objfile
->all_comp_units
.size ());
6267 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
6268 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
6270 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6272 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6273 struct dwarf2_per_cu_quick_data
);
6276 /* Return 1 so that gdb sees the "quick" functions. However,
6277 these functions will be no-ops because we will have expanded
6279 *index_kind
= dw_index_kind::GDB_INDEX
;
6283 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6285 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6289 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6290 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
6291 get_gdb_index_contents_from_section
<dwz_file
>))
6293 *index_kind
= dw_index_kind::GDB_INDEX
;
6297 /* ... otherwise, try to find the index in the index cache. */
6298 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6299 get_gdb_index_contents_from_cache
,
6300 get_gdb_index_contents_from_cache_dwz
))
6302 global_index_cache
.hit ();
6303 *index_kind
= dw_index_kind::GDB_INDEX
;
6307 global_index_cache
.miss ();
6313 /* Build a partial symbol table. */
6316 dwarf2_build_psymtabs (struct objfile
*objfile
)
6318 struct dwarf2_per_objfile
*dwarf2_per_objfile
6319 = get_dwarf2_per_objfile (objfile
);
6321 init_psymbol_list (objfile
, 1024);
6325 /* This isn't really ideal: all the data we allocate on the
6326 objfile's obstack is still uselessly kept around. However,
6327 freeing it seems unsafe. */
6328 psymtab_discarder
psymtabs (objfile
);
6329 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6332 /* (maybe) store an index in the cache. */
6333 global_index_cache
.store (dwarf2_per_objfile
);
6335 catch (const gdb_exception_error
&except
)
6337 exception_print (gdb_stderr
, except
);
6341 /* Return the total length of the CU described by HEADER. */
6344 get_cu_length (const struct comp_unit_head
*header
)
6346 return header
->initial_length_size
+ header
->length
;
6349 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6352 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6354 sect_offset bottom
= cu_header
->sect_off
;
6355 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6357 return sect_off
>= bottom
&& sect_off
< top
;
6360 /* Find the base address of the compilation unit for range lists and
6361 location lists. It will normally be specified by DW_AT_low_pc.
6362 In DWARF-3 draft 4, the base address could be overridden by
6363 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6364 compilation units with discontinuous ranges. */
6367 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6369 struct attribute
*attr
;
6372 cu
->base_address
= 0;
6374 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6377 cu
->base_address
= attr_value_as_address (attr
);
6382 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6385 cu
->base_address
= attr_value_as_address (attr
);
6391 /* Read in the comp unit header information from the debug_info at info_ptr.
6392 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6393 NOTE: This leaves members offset, first_die_offset to be filled in
6396 static const gdb_byte
*
6397 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6398 const gdb_byte
*info_ptr
,
6399 struct dwarf2_section_info
*section
,
6400 rcuh_kind section_kind
)
6403 unsigned int bytes_read
;
6404 const char *filename
= get_section_file_name (section
);
6405 bfd
*abfd
= get_section_bfd_owner (section
);
6407 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6408 cu_header
->initial_length_size
= bytes_read
;
6409 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6410 info_ptr
+= bytes_read
;
6411 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6412 if (cu_header
->version
< 2 || cu_header
->version
> 5)
6413 error (_("Dwarf Error: wrong version in compilation unit header "
6414 "(is %d, should be 2, 3, 4 or 5) [in module %s]"),
6415 cu_header
->version
, filename
);
6417 if (cu_header
->version
< 5)
6418 switch (section_kind
)
6420 case rcuh_kind::COMPILE
:
6421 cu_header
->unit_type
= DW_UT_compile
;
6423 case rcuh_kind::TYPE
:
6424 cu_header
->unit_type
= DW_UT_type
;
6427 internal_error (__FILE__
, __LINE__
,
6428 _("read_comp_unit_head: invalid section_kind"));
6432 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6433 (read_1_byte (abfd
, info_ptr
));
6435 switch (cu_header
->unit_type
)
6438 if (section_kind
!= rcuh_kind::COMPILE
)
6439 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6440 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
6444 section_kind
= rcuh_kind::TYPE
;
6447 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6448 "(is %d, should be %d or %d) [in module %s]"),
6449 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
6452 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6455 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6458 info_ptr
+= bytes_read
;
6459 if (cu_header
->version
< 5)
6461 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6464 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6465 if (signed_addr
< 0)
6466 internal_error (__FILE__
, __LINE__
,
6467 _("read_comp_unit_head: dwarf from non elf file"));
6468 cu_header
->signed_addr_p
= signed_addr
;
6470 if (section_kind
== rcuh_kind::TYPE
)
6472 LONGEST type_offset
;
6474 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6477 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6478 info_ptr
+= bytes_read
;
6479 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6480 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6481 error (_("Dwarf Error: Too big type_offset in compilation unit "
6482 "header (is %s) [in module %s]"), plongest (type_offset
),
6489 /* Helper function that returns the proper abbrev section for
6492 static struct dwarf2_section_info
*
6493 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6495 struct dwarf2_section_info
*abbrev
;
6496 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6498 if (this_cu
->is_dwz
)
6499 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6501 abbrev
= &dwarf2_per_objfile
->abbrev
;
6506 /* Subroutine of read_and_check_comp_unit_head and
6507 read_and_check_type_unit_head to simplify them.
6508 Perform various error checking on the header. */
6511 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6512 struct comp_unit_head
*header
,
6513 struct dwarf2_section_info
*section
,
6514 struct dwarf2_section_info
*abbrev_section
)
6516 const char *filename
= get_section_file_name (section
);
6518 if (to_underlying (header
->abbrev_sect_off
)
6519 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6520 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6521 "(offset %s + 6) [in module %s]"),
6522 sect_offset_str (header
->abbrev_sect_off
),
6523 sect_offset_str (header
->sect_off
),
6526 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6527 avoid potential 32-bit overflow. */
6528 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6530 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6531 "(offset %s + 0) [in module %s]"),
6532 header
->length
, sect_offset_str (header
->sect_off
),
6536 /* Read in a CU/TU header and perform some basic error checking.
6537 The contents of the header are stored in HEADER.
6538 The result is a pointer to the start of the first DIE. */
6540 static const gdb_byte
*
6541 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6542 struct comp_unit_head
*header
,
6543 struct dwarf2_section_info
*section
,
6544 struct dwarf2_section_info
*abbrev_section
,
6545 const gdb_byte
*info_ptr
,
6546 rcuh_kind section_kind
)
6548 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6550 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6552 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6554 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6556 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6562 /* Fetch the abbreviation table offset from a comp or type unit header. */
6565 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6566 struct dwarf2_section_info
*section
,
6567 sect_offset sect_off
)
6569 bfd
*abfd
= get_section_bfd_owner (section
);
6570 const gdb_byte
*info_ptr
;
6571 unsigned int initial_length_size
, offset_size
;
6574 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6575 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6576 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6577 offset_size
= initial_length_size
== 4 ? 4 : 8;
6578 info_ptr
+= initial_length_size
;
6580 version
= read_2_bytes (abfd
, info_ptr
);
6584 /* Skip unit type and address size. */
6588 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6591 /* Allocate a new partial symtab for file named NAME and mark this new
6592 partial symtab as being an include of PST. */
6595 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6596 struct objfile
*objfile
)
6598 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6600 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6602 /* It shares objfile->objfile_obstack. */
6603 subpst
->dirname
= pst
->dirname
;
6606 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6607 subpst
->dependencies
[0] = pst
;
6608 subpst
->number_of_dependencies
= 1;
6610 subpst
->read_symtab
= pst
->read_symtab
;
6612 /* No private part is necessary for include psymtabs. This property
6613 can be used to differentiate between such include psymtabs and
6614 the regular ones. */
6615 subpst
->read_symtab_private
= NULL
;
6618 /* Read the Line Number Program data and extract the list of files
6619 included by the source file represented by PST. Build an include
6620 partial symtab for each of these included files. */
6623 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6624 struct die_info
*die
,
6625 struct partial_symtab
*pst
)
6628 struct attribute
*attr
;
6630 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6632 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6634 return; /* No linetable, so no includes. */
6636 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6637 that we pass in the raw text_low here; that is ok because we're
6638 only decoding the line table to make include partial symtabs, and
6639 so the addresses aren't really used. */
6640 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6641 pst
->raw_text_low (), 1);
6645 hash_signatured_type (const void *item
)
6647 const struct signatured_type
*sig_type
6648 = (const struct signatured_type
*) item
;
6650 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6651 return sig_type
->signature
;
6655 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6657 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6658 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6660 return lhs
->signature
== rhs
->signature
;
6663 /* Allocate a hash table for signatured types. */
6666 allocate_signatured_type_table (struct objfile
*objfile
)
6668 return htab_create_alloc_ex (41,
6669 hash_signatured_type
,
6672 &objfile
->objfile_obstack
,
6673 hashtab_obstack_allocate
,
6674 dummy_obstack_deallocate
);
6677 /* A helper function to add a signatured type CU to a table. */
6680 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6682 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6683 std::vector
<signatured_type
*> *all_type_units
6684 = (std::vector
<signatured_type
*> *) datum
;
6686 all_type_units
->push_back (sigt
);
6691 /* A helper for create_debug_types_hash_table. Read types from SECTION
6692 and fill them into TYPES_HTAB. It will process only type units,
6693 therefore DW_UT_type. */
6696 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6697 struct dwo_file
*dwo_file
,
6698 dwarf2_section_info
*section
, htab_t
&types_htab
,
6699 rcuh_kind section_kind
)
6701 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6702 struct dwarf2_section_info
*abbrev_section
;
6704 const gdb_byte
*info_ptr
, *end_ptr
;
6706 abbrev_section
= (dwo_file
!= NULL
6707 ? &dwo_file
->sections
.abbrev
6708 : &dwarf2_per_objfile
->abbrev
);
6710 if (dwarf_read_debug
)
6711 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6712 get_section_name (section
),
6713 get_section_file_name (abbrev_section
));
6715 dwarf2_read_section (objfile
, section
);
6716 info_ptr
= section
->buffer
;
6718 if (info_ptr
== NULL
)
6721 /* We can't set abfd until now because the section may be empty or
6722 not present, in which case the bfd is unknown. */
6723 abfd
= get_section_bfd_owner (section
);
6725 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6726 because we don't need to read any dies: the signature is in the
6729 end_ptr
= info_ptr
+ section
->size
;
6730 while (info_ptr
< end_ptr
)
6732 struct signatured_type
*sig_type
;
6733 struct dwo_unit
*dwo_tu
;
6735 const gdb_byte
*ptr
= info_ptr
;
6736 struct comp_unit_head header
;
6737 unsigned int length
;
6739 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6741 /* Initialize it due to a false compiler warning. */
6742 header
.signature
= -1;
6743 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6745 /* We need to read the type's signature in order to build the hash
6746 table, but we don't need anything else just yet. */
6748 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6749 abbrev_section
, ptr
, section_kind
);
6751 length
= get_cu_length (&header
);
6753 /* Skip dummy type units. */
6754 if (ptr
>= info_ptr
+ length
6755 || peek_abbrev_code (abfd
, ptr
) == 0
6756 || header
.unit_type
!= DW_UT_type
)
6762 if (types_htab
== NULL
)
6765 types_htab
= allocate_dwo_unit_table (objfile
);
6767 types_htab
= allocate_signatured_type_table (objfile
);
6773 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6775 dwo_tu
->dwo_file
= dwo_file
;
6776 dwo_tu
->signature
= header
.signature
;
6777 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6778 dwo_tu
->section
= section
;
6779 dwo_tu
->sect_off
= sect_off
;
6780 dwo_tu
->length
= length
;
6784 /* N.B.: type_offset is not usable if this type uses a DWO file.
6785 The real type_offset is in the DWO file. */
6787 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6788 struct signatured_type
);
6789 sig_type
->signature
= header
.signature
;
6790 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6791 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6792 sig_type
->per_cu
.is_debug_types
= 1;
6793 sig_type
->per_cu
.section
= section
;
6794 sig_type
->per_cu
.sect_off
= sect_off
;
6795 sig_type
->per_cu
.length
= length
;
6798 slot
= htab_find_slot (types_htab
,
6799 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6801 gdb_assert (slot
!= NULL
);
6804 sect_offset dup_sect_off
;
6808 const struct dwo_unit
*dup_tu
6809 = (const struct dwo_unit
*) *slot
;
6811 dup_sect_off
= dup_tu
->sect_off
;
6815 const struct signatured_type
*dup_tu
6816 = (const struct signatured_type
*) *slot
;
6818 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6821 complaint (_("debug type entry at offset %s is duplicate to"
6822 " the entry at offset %s, signature %s"),
6823 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6824 hex_string (header
.signature
));
6826 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6828 if (dwarf_read_debug
> 1)
6829 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6830 sect_offset_str (sect_off
),
6831 hex_string (header
.signature
));
6837 /* Create the hash table of all entries in the .debug_types
6838 (or .debug_types.dwo) section(s).
6839 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6840 otherwise it is NULL.
6842 The result is a pointer to the hash table or NULL if there are no types.
6844 Note: This function processes DWO files only, not DWP files. */
6847 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6848 struct dwo_file
*dwo_file
,
6849 VEC (dwarf2_section_info_def
) *types
,
6853 struct dwarf2_section_info
*section
;
6855 if (VEC_empty (dwarf2_section_info_def
, types
))
6859 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
6861 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, section
,
6862 types_htab
, rcuh_kind::TYPE
);
6865 /* Create the hash table of all entries in the .debug_types section,
6866 and initialize all_type_units.
6867 The result is zero if there is an error (e.g. missing .debug_types section),
6868 otherwise non-zero. */
6871 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6873 htab_t types_htab
= NULL
;
6875 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6876 &dwarf2_per_objfile
->info
, types_htab
,
6877 rcuh_kind::COMPILE
);
6878 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6879 dwarf2_per_objfile
->types
, types_htab
);
6880 if (types_htab
== NULL
)
6882 dwarf2_per_objfile
->signatured_types
= NULL
;
6886 dwarf2_per_objfile
->signatured_types
= types_htab
;
6888 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6889 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6891 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6892 &dwarf2_per_objfile
->all_type_units
);
6897 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6898 If SLOT is non-NULL, it is the entry to use in the hash table.
6899 Otherwise we find one. */
6901 static struct signatured_type
*
6902 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6905 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6907 if (dwarf2_per_objfile
->all_type_units
.size ()
6908 == dwarf2_per_objfile
->all_type_units
.capacity ())
6909 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6911 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6912 struct signatured_type
);
6914 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6915 sig_type
->signature
= sig
;
6916 sig_type
->per_cu
.is_debug_types
= 1;
6917 if (dwarf2_per_objfile
->using_index
)
6919 sig_type
->per_cu
.v
.quick
=
6920 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6921 struct dwarf2_per_cu_quick_data
);
6926 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6929 gdb_assert (*slot
== NULL
);
6931 /* The rest of sig_type must be filled in by the caller. */
6935 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6936 Fill in SIG_ENTRY with DWO_ENTRY. */
6939 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6940 struct signatured_type
*sig_entry
,
6941 struct dwo_unit
*dwo_entry
)
6943 /* Make sure we're not clobbering something we don't expect to. */
6944 gdb_assert (! sig_entry
->per_cu
.queued
);
6945 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6946 if (dwarf2_per_objfile
->using_index
)
6948 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6949 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6952 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6953 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6954 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6955 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6956 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6958 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6959 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6960 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6961 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6962 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6963 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6964 sig_entry
->dwo_unit
= dwo_entry
;
6967 /* Subroutine of lookup_signatured_type.
6968 If we haven't read the TU yet, create the signatured_type data structure
6969 for a TU to be read in directly from a DWO file, bypassing the stub.
6970 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6971 using .gdb_index, then when reading a CU we want to stay in the DWO file
6972 containing that CU. Otherwise we could end up reading several other DWO
6973 files (due to comdat folding) to process the transitive closure of all the
6974 mentioned TUs, and that can be slow. The current DWO file will have every
6975 type signature that it needs.
6976 We only do this for .gdb_index because in the psymtab case we already have
6977 to read all the DWOs to build the type unit groups. */
6979 static struct signatured_type
*
6980 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6982 struct dwarf2_per_objfile
*dwarf2_per_objfile
6983 = cu
->per_cu
->dwarf2_per_objfile
;
6984 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6985 struct dwo_file
*dwo_file
;
6986 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6987 struct signatured_type find_sig_entry
, *sig_entry
;
6990 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6992 /* If TU skeletons have been removed then we may not have read in any
6994 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6996 dwarf2_per_objfile
->signatured_types
6997 = allocate_signatured_type_table (objfile
);
7000 /* We only ever need to read in one copy of a signatured type.
7001 Use the global signatured_types array to do our own comdat-folding
7002 of types. If this is the first time we're reading this TU, and
7003 the TU has an entry in .gdb_index, replace the recorded data from
7004 .gdb_index with this TU. */
7006 find_sig_entry
.signature
= sig
;
7007 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7008 &find_sig_entry
, INSERT
);
7009 sig_entry
= (struct signatured_type
*) *slot
;
7011 /* We can get here with the TU already read, *or* in the process of being
7012 read. Don't reassign the global entry to point to this DWO if that's
7013 the case. Also note that if the TU is already being read, it may not
7014 have come from a DWO, the program may be a mix of Fission-compiled
7015 code and non-Fission-compiled code. */
7017 /* Have we already tried to read this TU?
7018 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7019 needn't exist in the global table yet). */
7020 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
7023 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
7024 dwo_unit of the TU itself. */
7025 dwo_file
= cu
->dwo_unit
->dwo_file
;
7027 /* Ok, this is the first time we're reading this TU. */
7028 if (dwo_file
->tus
== NULL
)
7030 find_dwo_entry
.signature
= sig
;
7031 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
7032 if (dwo_entry
== NULL
)
7035 /* If the global table doesn't have an entry for this TU, add one. */
7036 if (sig_entry
== NULL
)
7037 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7039 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7040 sig_entry
->per_cu
.tu_read
= 1;
7044 /* Subroutine of lookup_signatured_type.
7045 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
7046 then try the DWP file. If the TU stub (skeleton) has been removed then
7047 it won't be in .gdb_index. */
7049 static struct signatured_type
*
7050 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7052 struct dwarf2_per_objfile
*dwarf2_per_objfile
7053 = cu
->per_cu
->dwarf2_per_objfile
;
7054 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7055 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
7056 struct dwo_unit
*dwo_entry
;
7057 struct signatured_type find_sig_entry
, *sig_entry
;
7060 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
7061 gdb_assert (dwp_file
!= NULL
);
7063 /* If TU skeletons have been removed then we may not have read in any
7065 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7067 dwarf2_per_objfile
->signatured_types
7068 = allocate_signatured_type_table (objfile
);
7071 find_sig_entry
.signature
= sig
;
7072 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7073 &find_sig_entry
, INSERT
);
7074 sig_entry
= (struct signatured_type
*) *slot
;
7076 /* Have we already tried to read this TU?
7077 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7078 needn't exist in the global table yet). */
7079 if (sig_entry
!= NULL
)
7082 if (dwp_file
->tus
== NULL
)
7084 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
7085 sig
, 1 /* is_debug_types */);
7086 if (dwo_entry
== NULL
)
7089 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7090 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7095 /* Lookup a signature based type for DW_FORM_ref_sig8.
7096 Returns NULL if signature SIG is not present in the table.
7097 It is up to the caller to complain about this. */
7099 static struct signatured_type
*
7100 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7102 struct dwarf2_per_objfile
*dwarf2_per_objfile
7103 = cu
->per_cu
->dwarf2_per_objfile
;
7106 && dwarf2_per_objfile
->using_index
)
7108 /* We're in a DWO/DWP file, and we're using .gdb_index.
7109 These cases require special processing. */
7110 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7111 return lookup_dwo_signatured_type (cu
, sig
);
7113 return lookup_dwp_signatured_type (cu
, sig
);
7117 struct signatured_type find_entry
, *entry
;
7119 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7121 find_entry
.signature
= sig
;
7122 entry
= ((struct signatured_type
*)
7123 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7128 /* Low level DIE reading support. */
7130 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7133 init_cu_die_reader (struct die_reader_specs
*reader
,
7134 struct dwarf2_cu
*cu
,
7135 struct dwarf2_section_info
*section
,
7136 struct dwo_file
*dwo_file
,
7137 struct abbrev_table
*abbrev_table
)
7139 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7140 reader
->abfd
= get_section_bfd_owner (section
);
7142 reader
->dwo_file
= dwo_file
;
7143 reader
->die_section
= section
;
7144 reader
->buffer
= section
->buffer
;
7145 reader
->buffer_end
= section
->buffer
+ section
->size
;
7146 reader
->comp_dir
= NULL
;
7147 reader
->abbrev_table
= abbrev_table
;
7150 /* Subroutine of init_cutu_and_read_dies to simplify it.
7151 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7152 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7155 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7156 from it to the DIE in the DWO. If NULL we are skipping the stub.
7157 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7158 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7159 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7160 STUB_COMP_DIR may be non-NULL.
7161 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7162 are filled in with the info of the DIE from the DWO file.
7163 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7164 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7165 kept around for at least as long as *RESULT_READER.
7167 The result is non-zero if a valid (non-dummy) DIE was found. */
7170 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7171 struct dwo_unit
*dwo_unit
,
7172 struct die_info
*stub_comp_unit_die
,
7173 const char *stub_comp_dir
,
7174 struct die_reader_specs
*result_reader
,
7175 const gdb_byte
**result_info_ptr
,
7176 struct die_info
**result_comp_unit_die
,
7177 int *result_has_children
,
7178 abbrev_table_up
*result_dwo_abbrev_table
)
7180 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7181 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7182 struct dwarf2_cu
*cu
= this_cu
->cu
;
7184 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7185 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7186 int i
,num_extra_attrs
;
7187 struct dwarf2_section_info
*dwo_abbrev_section
;
7188 struct attribute
*attr
;
7189 struct die_info
*comp_unit_die
;
7191 /* At most one of these may be provided. */
7192 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7194 /* These attributes aren't processed until later:
7195 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7196 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7197 referenced later. However, these attributes are found in the stub
7198 which we won't have later. In order to not impose this complication
7199 on the rest of the code, we read them here and copy them to the
7208 if (stub_comp_unit_die
!= NULL
)
7210 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7212 if (! this_cu
->is_debug_types
)
7213 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7214 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7215 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7216 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7217 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7219 /* There should be a DW_AT_addr_base attribute here (if needed).
7220 We need the value before we can process DW_FORM_GNU_addr_index
7221 or DW_FORM_addrx. */
7223 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7225 cu
->addr_base
= DW_UNSND (attr
);
7227 /* There should be a DW_AT_ranges_base attribute here (if needed).
7228 We need the value before we can process DW_AT_ranges. */
7229 cu
->ranges_base
= 0;
7230 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7232 cu
->ranges_base
= DW_UNSND (attr
);
7234 else if (stub_comp_dir
!= NULL
)
7236 /* Reconstruct the comp_dir attribute to simplify the code below. */
7237 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7238 comp_dir
->name
= DW_AT_comp_dir
;
7239 comp_dir
->form
= DW_FORM_string
;
7240 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7241 DW_STRING (comp_dir
) = stub_comp_dir
;
7244 /* Set up for reading the DWO CU/TU. */
7245 cu
->dwo_unit
= dwo_unit
;
7246 dwarf2_section_info
*section
= dwo_unit
->section
;
7247 dwarf2_read_section (objfile
, section
);
7248 abfd
= get_section_bfd_owner (section
);
7249 begin_info_ptr
= info_ptr
= (section
->buffer
7250 + to_underlying (dwo_unit
->sect_off
));
7251 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7253 if (this_cu
->is_debug_types
)
7255 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7257 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7258 &cu
->header
, section
,
7260 info_ptr
, rcuh_kind::TYPE
);
7261 /* This is not an assert because it can be caused by bad debug info. */
7262 if (sig_type
->signature
!= cu
->header
.signature
)
7264 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7265 " TU at offset %s [in module %s]"),
7266 hex_string (sig_type
->signature
),
7267 hex_string (cu
->header
.signature
),
7268 sect_offset_str (dwo_unit
->sect_off
),
7269 bfd_get_filename (abfd
));
7271 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7272 /* For DWOs coming from DWP files, we don't know the CU length
7273 nor the type's offset in the TU until now. */
7274 dwo_unit
->length
= get_cu_length (&cu
->header
);
7275 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7277 /* Establish the type offset that can be used to lookup the type.
7278 For DWO files, we don't know it until now. */
7279 sig_type
->type_offset_in_section
7280 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7284 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7285 &cu
->header
, section
,
7287 info_ptr
, rcuh_kind::COMPILE
);
7288 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7289 /* For DWOs coming from DWP files, we don't know the CU length
7291 dwo_unit
->length
= get_cu_length (&cu
->header
);
7294 *result_dwo_abbrev_table
7295 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7296 cu
->header
.abbrev_sect_off
);
7297 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7298 result_dwo_abbrev_table
->get ());
7300 /* Read in the die, but leave space to copy over the attributes
7301 from the stub. This has the benefit of simplifying the rest of
7302 the code - all the work to maintain the illusion of a single
7303 DW_TAG_{compile,type}_unit DIE is done here. */
7304 num_extra_attrs
= ((stmt_list
!= NULL
)
7308 + (comp_dir
!= NULL
));
7309 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7310 result_has_children
, num_extra_attrs
);
7312 /* Copy over the attributes from the stub to the DIE we just read in. */
7313 comp_unit_die
= *result_comp_unit_die
;
7314 i
= comp_unit_die
->num_attrs
;
7315 if (stmt_list
!= NULL
)
7316 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7318 comp_unit_die
->attrs
[i
++] = *low_pc
;
7319 if (high_pc
!= NULL
)
7320 comp_unit_die
->attrs
[i
++] = *high_pc
;
7322 comp_unit_die
->attrs
[i
++] = *ranges
;
7323 if (comp_dir
!= NULL
)
7324 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7325 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7327 if (dwarf_die_debug
)
7329 fprintf_unfiltered (gdb_stdlog
,
7330 "Read die from %s@0x%x of %s:\n",
7331 get_section_name (section
),
7332 (unsigned) (begin_info_ptr
- section
->buffer
),
7333 bfd_get_filename (abfd
));
7334 dump_die (comp_unit_die
, dwarf_die_debug
);
7337 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7338 TUs by skipping the stub and going directly to the entry in the DWO file.
7339 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7340 to get it via circuitous means. Blech. */
7341 if (comp_dir
!= NULL
)
7342 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7344 /* Skip dummy compilation units. */
7345 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7346 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7349 *result_info_ptr
= info_ptr
;
7353 /* Subroutine of init_cutu_and_read_dies to simplify it.
7354 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7355 Returns NULL if the specified DWO unit cannot be found. */
7357 static struct dwo_unit
*
7358 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7359 struct die_info
*comp_unit_die
)
7361 struct dwarf2_cu
*cu
= this_cu
->cu
;
7363 struct dwo_unit
*dwo_unit
;
7364 const char *comp_dir
, *dwo_name
;
7366 gdb_assert (cu
!= NULL
);
7368 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7369 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7370 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7372 if (this_cu
->is_debug_types
)
7374 struct signatured_type
*sig_type
;
7376 /* Since this_cu is the first member of struct signatured_type,
7377 we can go from a pointer to one to a pointer to the other. */
7378 sig_type
= (struct signatured_type
*) this_cu
;
7379 signature
= sig_type
->signature
;
7380 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7384 struct attribute
*attr
;
7386 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7388 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7390 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7391 signature
= DW_UNSND (attr
);
7392 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7399 /* Subroutine of init_cutu_and_read_dies to simplify it.
7400 See it for a description of the parameters.
7401 Read a TU directly from a DWO file, bypassing the stub. */
7404 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7405 int use_existing_cu
, int keep
,
7406 die_reader_func_ftype
*die_reader_func
,
7409 std::unique_ptr
<dwarf2_cu
> new_cu
;
7410 struct signatured_type
*sig_type
;
7411 struct die_reader_specs reader
;
7412 const gdb_byte
*info_ptr
;
7413 struct die_info
*comp_unit_die
;
7415 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7417 /* Verify we can do the following downcast, and that we have the
7419 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7420 sig_type
= (struct signatured_type
*) this_cu
;
7421 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7423 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7425 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7426 /* There's no need to do the rereading_dwo_cu handling that
7427 init_cutu_and_read_dies does since we don't read the stub. */
7431 /* If !use_existing_cu, this_cu->cu must be NULL. */
7432 gdb_assert (this_cu
->cu
== NULL
);
7433 new_cu
.reset (new dwarf2_cu (this_cu
));
7436 /* A future optimization, if needed, would be to use an existing
7437 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7438 could share abbrev tables. */
7440 /* The abbreviation table used by READER, this must live at least as long as
7442 abbrev_table_up dwo_abbrev_table
;
7444 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7445 NULL
/* stub_comp_unit_die */,
7446 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7448 &comp_unit_die
, &has_children
,
7449 &dwo_abbrev_table
) == 0)
7455 /* All the "real" work is done here. */
7456 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7458 /* This duplicates the code in init_cutu_and_read_dies,
7459 but the alternative is making the latter more complex.
7460 This function is only for the special case of using DWO files directly:
7461 no point in overly complicating the general case just to handle this. */
7462 if (new_cu
!= NULL
&& keep
)
7464 /* Link this CU into read_in_chain. */
7465 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7466 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7467 /* The chain owns it now. */
7472 /* Initialize a CU (or TU) and read its DIEs.
7473 If the CU defers to a DWO file, read the DWO file as well.
7475 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7476 Otherwise the table specified in the comp unit header is read in and used.
7477 This is an optimization for when we already have the abbrev table.
7479 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7480 Otherwise, a new CU is allocated with xmalloc.
7482 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7483 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7485 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7486 linker) then DIE_READER_FUNC will not get called. */
7489 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7490 struct abbrev_table
*abbrev_table
,
7491 int use_existing_cu
, int keep
,
7493 die_reader_func_ftype
*die_reader_func
,
7496 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7497 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7498 struct dwarf2_section_info
*section
= this_cu
->section
;
7499 bfd
*abfd
= get_section_bfd_owner (section
);
7500 struct dwarf2_cu
*cu
;
7501 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7502 struct die_reader_specs reader
;
7503 struct die_info
*comp_unit_die
;
7505 struct attribute
*attr
;
7506 struct signatured_type
*sig_type
= NULL
;
7507 struct dwarf2_section_info
*abbrev_section
;
7508 /* Non-zero if CU currently points to a DWO file and we need to
7509 reread it. When this happens we need to reread the skeleton die
7510 before we can reread the DWO file (this only applies to CUs, not TUs). */
7511 int rereading_dwo_cu
= 0;
7513 if (dwarf_die_debug
)
7514 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7515 this_cu
->is_debug_types
? "type" : "comp",
7516 sect_offset_str (this_cu
->sect_off
));
7518 if (use_existing_cu
)
7521 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7522 file (instead of going through the stub), short-circuit all of this. */
7523 if (this_cu
->reading_dwo_directly
)
7525 /* Narrow down the scope of possibilities to have to understand. */
7526 gdb_assert (this_cu
->is_debug_types
);
7527 gdb_assert (abbrev_table
== NULL
);
7528 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7529 die_reader_func
, data
);
7533 /* This is cheap if the section is already read in. */
7534 dwarf2_read_section (objfile
, section
);
7536 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7538 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7540 std::unique_ptr
<dwarf2_cu
> new_cu
;
7541 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7544 /* If this CU is from a DWO file we need to start over, we need to
7545 refetch the attributes from the skeleton CU.
7546 This could be optimized by retrieving those attributes from when we
7547 were here the first time: the previous comp_unit_die was stored in
7548 comp_unit_obstack. But there's no data yet that we need this
7550 if (cu
->dwo_unit
!= NULL
)
7551 rereading_dwo_cu
= 1;
7555 /* If !use_existing_cu, this_cu->cu must be NULL. */
7556 gdb_assert (this_cu
->cu
== NULL
);
7557 new_cu
.reset (new dwarf2_cu (this_cu
));
7561 /* Get the header. */
7562 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7564 /* We already have the header, there's no need to read it in again. */
7565 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7569 if (this_cu
->is_debug_types
)
7571 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7572 &cu
->header
, section
,
7573 abbrev_section
, info_ptr
,
7576 /* Since per_cu is the first member of struct signatured_type,
7577 we can go from a pointer to one to a pointer to the other. */
7578 sig_type
= (struct signatured_type
*) this_cu
;
7579 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7580 gdb_assert (sig_type
->type_offset_in_tu
7581 == cu
->header
.type_cu_offset_in_tu
);
7582 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7584 /* LENGTH has not been set yet for type units if we're
7585 using .gdb_index. */
7586 this_cu
->length
= get_cu_length (&cu
->header
);
7588 /* Establish the type offset that can be used to lookup the type. */
7589 sig_type
->type_offset_in_section
=
7590 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7592 this_cu
->dwarf_version
= cu
->header
.version
;
7596 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7597 &cu
->header
, section
,
7600 rcuh_kind::COMPILE
);
7602 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7603 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7604 this_cu
->dwarf_version
= cu
->header
.version
;
7608 /* Skip dummy compilation units. */
7609 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7610 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7613 /* If we don't have them yet, read the abbrevs for this compilation unit.
7614 And if we need to read them now, make sure they're freed when we're
7615 done (own the table through ABBREV_TABLE_HOLDER). */
7616 abbrev_table_up abbrev_table_holder
;
7617 if (abbrev_table
!= NULL
)
7618 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7622 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7623 cu
->header
.abbrev_sect_off
);
7624 abbrev_table
= abbrev_table_holder
.get ();
7627 /* Read the top level CU/TU die. */
7628 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7629 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7631 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7634 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7635 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7636 table from the DWO file and pass the ownership over to us. It will be
7637 referenced from READER, so we must make sure to free it after we're done
7640 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7641 DWO CU, that this test will fail (the attribute will not be present). */
7642 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7643 abbrev_table_up dwo_abbrev_table
;
7646 struct dwo_unit
*dwo_unit
;
7647 struct die_info
*dwo_comp_unit_die
;
7651 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7652 " has children (offset %s) [in module %s]"),
7653 sect_offset_str (this_cu
->sect_off
),
7654 bfd_get_filename (abfd
));
7656 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7657 if (dwo_unit
!= NULL
)
7659 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7660 comp_unit_die
, NULL
,
7662 &dwo_comp_unit_die
, &has_children
,
7663 &dwo_abbrev_table
) == 0)
7668 comp_unit_die
= dwo_comp_unit_die
;
7672 /* Yikes, we couldn't find the rest of the DIE, we only have
7673 the stub. A complaint has already been logged. There's
7674 not much more we can do except pass on the stub DIE to
7675 die_reader_func. We don't want to throw an error on bad
7680 /* All of the above is setup for this call. Yikes. */
7681 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7683 /* Done, clean up. */
7684 if (new_cu
!= NULL
&& keep
)
7686 /* Link this CU into read_in_chain. */
7687 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7688 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7689 /* The chain owns it now. */
7694 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7695 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7696 to have already done the lookup to find the DWO file).
7698 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7699 THIS_CU->is_debug_types, but nothing else.
7701 We fill in THIS_CU->length.
7703 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7704 linker) then DIE_READER_FUNC will not get called.
7706 THIS_CU->cu is always freed when done.
7707 This is done in order to not leave THIS_CU->cu in a state where we have
7708 to care whether it refers to the "main" CU or the DWO CU. */
7711 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7712 struct dwo_file
*dwo_file
,
7713 die_reader_func_ftype
*die_reader_func
,
7716 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7717 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7718 struct dwarf2_section_info
*section
= this_cu
->section
;
7719 bfd
*abfd
= get_section_bfd_owner (section
);
7720 struct dwarf2_section_info
*abbrev_section
;
7721 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7722 struct die_reader_specs reader
;
7723 struct die_info
*comp_unit_die
;
7726 if (dwarf_die_debug
)
7727 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7728 this_cu
->is_debug_types
? "type" : "comp",
7729 sect_offset_str (this_cu
->sect_off
));
7731 gdb_assert (this_cu
->cu
== NULL
);
7733 abbrev_section
= (dwo_file
!= NULL
7734 ? &dwo_file
->sections
.abbrev
7735 : get_abbrev_section_for_cu (this_cu
));
7737 /* This is cheap if the section is already read in. */
7738 dwarf2_read_section (objfile
, section
);
7740 struct dwarf2_cu
cu (this_cu
);
7742 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7743 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7744 &cu
.header
, section
,
7745 abbrev_section
, info_ptr
,
7746 (this_cu
->is_debug_types
7748 : rcuh_kind::COMPILE
));
7750 this_cu
->length
= get_cu_length (&cu
.header
);
7752 /* Skip dummy compilation units. */
7753 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7754 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7757 abbrev_table_up abbrev_table
7758 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7759 cu
.header
.abbrev_sect_off
);
7761 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7762 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7764 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7767 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7768 does not lookup the specified DWO file.
7769 This cannot be used to read DWO files.
7771 THIS_CU->cu is always freed when done.
7772 This is done in order to not leave THIS_CU->cu in a state where we have
7773 to care whether it refers to the "main" CU or the DWO CU.
7774 We can revisit this if the data shows there's a performance issue. */
7777 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7778 die_reader_func_ftype
*die_reader_func
,
7781 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7784 /* Type Unit Groups.
7786 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7787 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7788 so that all types coming from the same compilation (.o file) are grouped
7789 together. A future step could be to put the types in the same symtab as
7790 the CU the types ultimately came from. */
7793 hash_type_unit_group (const void *item
)
7795 const struct type_unit_group
*tu_group
7796 = (const struct type_unit_group
*) item
;
7798 return hash_stmt_list_entry (&tu_group
->hash
);
7802 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7804 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7805 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7807 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7810 /* Allocate a hash table for type unit groups. */
7813 allocate_type_unit_groups_table (struct objfile
*objfile
)
7815 return htab_create_alloc_ex (3,
7816 hash_type_unit_group
,
7819 &objfile
->objfile_obstack
,
7820 hashtab_obstack_allocate
,
7821 dummy_obstack_deallocate
);
7824 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7825 partial symtabs. We combine several TUs per psymtab to not let the size
7826 of any one psymtab grow too big. */
7827 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7828 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7830 /* Helper routine for get_type_unit_group.
7831 Create the type_unit_group object used to hold one or more TUs. */
7833 static struct type_unit_group
*
7834 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7836 struct dwarf2_per_objfile
*dwarf2_per_objfile
7837 = cu
->per_cu
->dwarf2_per_objfile
;
7838 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7839 struct dwarf2_per_cu_data
*per_cu
;
7840 struct type_unit_group
*tu_group
;
7842 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7843 struct type_unit_group
);
7844 per_cu
= &tu_group
->per_cu
;
7845 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7847 if (dwarf2_per_objfile
->using_index
)
7849 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7850 struct dwarf2_per_cu_quick_data
);
7854 unsigned int line_offset
= to_underlying (line_offset_struct
);
7855 struct partial_symtab
*pst
;
7858 /* Give the symtab a useful name for debug purposes. */
7859 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7860 name
= string_printf ("<type_units_%d>",
7861 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7863 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7865 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7869 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7870 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7875 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7876 STMT_LIST is a DW_AT_stmt_list attribute. */
7878 static struct type_unit_group
*
7879 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7881 struct dwarf2_per_objfile
*dwarf2_per_objfile
7882 = cu
->per_cu
->dwarf2_per_objfile
;
7883 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7884 struct type_unit_group
*tu_group
;
7886 unsigned int line_offset
;
7887 struct type_unit_group type_unit_group_for_lookup
;
7889 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7891 dwarf2_per_objfile
->type_unit_groups
=
7892 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7895 /* Do we need to create a new group, or can we use an existing one? */
7899 line_offset
= DW_UNSND (stmt_list
);
7900 ++tu_stats
->nr_symtab_sharers
;
7904 /* Ugh, no stmt_list. Rare, but we have to handle it.
7905 We can do various things here like create one group per TU or
7906 spread them over multiple groups to split up the expansion work.
7907 To avoid worst case scenarios (too many groups or too large groups)
7908 we, umm, group them in bunches. */
7909 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7910 | (tu_stats
->nr_stmt_less_type_units
7911 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7912 ++tu_stats
->nr_stmt_less_type_units
;
7915 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7916 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7917 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7918 &type_unit_group_for_lookup
, INSERT
);
7921 tu_group
= (struct type_unit_group
*) *slot
;
7922 gdb_assert (tu_group
!= NULL
);
7926 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7927 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7929 ++tu_stats
->nr_symtabs
;
7935 /* Partial symbol tables. */
7937 /* Create a psymtab named NAME and assign it to PER_CU.
7939 The caller must fill in the following details:
7940 dirname, textlow, texthigh. */
7942 static struct partial_symtab
*
7943 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7945 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7946 struct partial_symtab
*pst
;
7948 pst
= start_psymtab_common (objfile
, name
, 0);
7950 pst
->psymtabs_addrmap_supported
= 1;
7952 /* This is the glue that links PST into GDB's symbol API. */
7953 pst
->read_symtab_private
= per_cu
;
7954 pst
->read_symtab
= dwarf2_read_symtab
;
7955 per_cu
->v
.psymtab
= pst
;
7960 /* The DATA object passed to process_psymtab_comp_unit_reader has this
7963 struct process_psymtab_comp_unit_data
7965 /* True if we are reading a DW_TAG_partial_unit. */
7967 int want_partial_unit
;
7969 /* The "pretend" language that is used if the CU doesn't declare a
7972 enum language pretend_language
;
7975 /* die_reader_func for process_psymtab_comp_unit. */
7978 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7979 const gdb_byte
*info_ptr
,
7980 struct die_info
*comp_unit_die
,
7984 struct dwarf2_cu
*cu
= reader
->cu
;
7985 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7986 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7987 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7989 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7990 struct partial_symtab
*pst
;
7991 enum pc_bounds_kind cu_bounds_kind
;
7992 const char *filename
;
7993 struct process_psymtab_comp_unit_data
*info
7994 = (struct process_psymtab_comp_unit_data
*) data
;
7996 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
7999 gdb_assert (! per_cu
->is_debug_types
);
8001 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
8003 /* Allocate a new partial symbol table structure. */
8004 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
8005 if (filename
== NULL
)
8008 pst
= create_partial_symtab (per_cu
, filename
);
8010 /* This must be done before calling dwarf2_build_include_psymtabs. */
8011 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
8013 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8015 dwarf2_find_base_address (comp_unit_die
, cu
);
8017 /* Possibly set the default values of LOWPC and HIGHPC from
8019 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
8020 &best_highpc
, cu
, pst
);
8021 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
8024 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
8027 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
8029 /* Store the contiguous range if it is not empty; it can be
8030 empty for CUs with no code. */
8031 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8035 /* Check if comp unit has_children.
8036 If so, read the rest of the partial symbols from this comp unit.
8037 If not, there's no more debug_info for this comp unit. */
8040 struct partial_die_info
*first_die
;
8041 CORE_ADDR lowpc
, highpc
;
8043 lowpc
= ((CORE_ADDR
) -1);
8044 highpc
= ((CORE_ADDR
) 0);
8046 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8048 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
8049 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
8051 /* If we didn't find a lowpc, set it to highpc to avoid
8052 complaints from `maint check'. */
8053 if (lowpc
== ((CORE_ADDR
) -1))
8056 /* If the compilation unit didn't have an explicit address range,
8057 then use the information extracted from its child dies. */
8058 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
8061 best_highpc
= highpc
;
8064 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
8065 best_lowpc
+ baseaddr
)
8067 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
8068 best_highpc
+ baseaddr
)
8071 end_psymtab_common (objfile
, pst
);
8073 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
8076 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8077 struct dwarf2_per_cu_data
*iter
;
8079 /* Fill in 'dependencies' here; we fill in 'users' in a
8081 pst
->number_of_dependencies
= len
;
8083 = objfile
->partial_symtabs
->allocate_dependencies (len
);
8085 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8088 pst
->dependencies
[i
] = iter
->v
.psymtab
;
8090 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8093 /* Get the list of files included in the current compilation unit,
8094 and build a psymtab for each of them. */
8095 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8097 if (dwarf_read_debug
)
8098 fprintf_unfiltered (gdb_stdlog
,
8099 "Psymtab for %s unit @%s: %s - %s"
8100 ", %d global, %d static syms\n",
8101 per_cu
->is_debug_types
? "type" : "comp",
8102 sect_offset_str (per_cu
->sect_off
),
8103 paddress (gdbarch
, pst
->text_low (objfile
)),
8104 paddress (gdbarch
, pst
->text_high (objfile
)),
8105 pst
->n_global_syms
, pst
->n_static_syms
);
8108 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8109 Process compilation unit THIS_CU for a psymtab. */
8112 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8113 int want_partial_unit
,
8114 enum language pretend_language
)
8116 /* If this compilation unit was already read in, free the
8117 cached copy in order to read it in again. This is
8118 necessary because we skipped some symbols when we first
8119 read in the compilation unit (see load_partial_dies).
8120 This problem could be avoided, but the benefit is unclear. */
8121 if (this_cu
->cu
!= NULL
)
8122 free_one_cached_comp_unit (this_cu
);
8124 if (this_cu
->is_debug_types
)
8125 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8126 build_type_psymtabs_reader
, NULL
);
8129 process_psymtab_comp_unit_data info
;
8130 info
.want_partial_unit
= want_partial_unit
;
8131 info
.pretend_language
= pretend_language
;
8132 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8133 process_psymtab_comp_unit_reader
, &info
);
8136 /* Age out any secondary CUs. */
8137 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8140 /* Reader function for build_type_psymtabs. */
8143 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8144 const gdb_byte
*info_ptr
,
8145 struct die_info
*type_unit_die
,
8149 struct dwarf2_per_objfile
*dwarf2_per_objfile
8150 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8151 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8152 struct dwarf2_cu
*cu
= reader
->cu
;
8153 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8154 struct signatured_type
*sig_type
;
8155 struct type_unit_group
*tu_group
;
8156 struct attribute
*attr
;
8157 struct partial_die_info
*first_die
;
8158 CORE_ADDR lowpc
, highpc
;
8159 struct partial_symtab
*pst
;
8161 gdb_assert (data
== NULL
);
8162 gdb_assert (per_cu
->is_debug_types
);
8163 sig_type
= (struct signatured_type
*) per_cu
;
8168 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8169 tu_group
= get_type_unit_group (cu
, attr
);
8171 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
8173 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8174 pst
= create_partial_symtab (per_cu
, "");
8177 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8179 lowpc
= (CORE_ADDR
) -1;
8180 highpc
= (CORE_ADDR
) 0;
8181 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8183 end_psymtab_common (objfile
, pst
);
8186 /* Struct used to sort TUs by their abbreviation table offset. */
8188 struct tu_abbrev_offset
8190 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
8191 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
8194 signatured_type
*sig_type
;
8195 sect_offset abbrev_offset
;
8198 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8201 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8202 const struct tu_abbrev_offset
&b
)
8204 return a
.abbrev_offset
< b
.abbrev_offset
;
8207 /* Efficiently read all the type units.
8208 This does the bulk of the work for build_type_psymtabs.
8210 The efficiency is because we sort TUs by the abbrev table they use and
8211 only read each abbrev table once. In one program there are 200K TUs
8212 sharing 8K abbrev tables.
8214 The main purpose of this function is to support building the
8215 dwarf2_per_objfile->type_unit_groups table.
8216 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8217 can collapse the search space by grouping them by stmt_list.
8218 The savings can be significant, in the same program from above the 200K TUs
8219 share 8K stmt_list tables.
8221 FUNC is expected to call get_type_unit_group, which will create the
8222 struct type_unit_group if necessary and add it to
8223 dwarf2_per_objfile->type_unit_groups. */
8226 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8228 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8229 abbrev_table_up abbrev_table
;
8230 sect_offset abbrev_offset
;
8232 /* It's up to the caller to not call us multiple times. */
8233 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8235 if (dwarf2_per_objfile
->all_type_units
.empty ())
8238 /* TUs typically share abbrev tables, and there can be way more TUs than
8239 abbrev tables. Sort by abbrev table to reduce the number of times we
8240 read each abbrev table in.
8241 Alternatives are to punt or to maintain a cache of abbrev tables.
8242 This is simpler and efficient enough for now.
8244 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8245 symtab to use). Typically TUs with the same abbrev offset have the same
8246 stmt_list value too so in practice this should work well.
8248 The basic algorithm here is:
8250 sort TUs by abbrev table
8251 for each TU with same abbrev table:
8252 read abbrev table if first user
8253 read TU top level DIE
8254 [IWBN if DWO skeletons had DW_AT_stmt_list]
8257 if (dwarf_read_debug
)
8258 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8260 /* Sort in a separate table to maintain the order of all_type_units
8261 for .gdb_index: TU indices directly index all_type_units. */
8262 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
8263 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
8265 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
8266 sorted_by_abbrev
.emplace_back
8267 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
8268 sig_type
->per_cu
.section
,
8269 sig_type
->per_cu
.sect_off
));
8271 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8272 sort_tu_by_abbrev_offset
);
8274 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8276 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
8278 /* Switch to the next abbrev table if necessary. */
8279 if (abbrev_table
== NULL
8280 || tu
.abbrev_offset
!= abbrev_offset
)
8282 abbrev_offset
= tu
.abbrev_offset
;
8284 abbrev_table_read_table (dwarf2_per_objfile
,
8285 &dwarf2_per_objfile
->abbrev
,
8287 ++tu_stats
->nr_uniq_abbrev_tables
;
8290 init_cutu_and_read_dies (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
8291 0, 0, false, build_type_psymtabs_reader
, NULL
);
8295 /* Print collected type unit statistics. */
8298 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8300 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8302 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8303 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8304 dwarf2_per_objfile
->all_type_units
.size ());
8305 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8306 tu_stats
->nr_uniq_abbrev_tables
);
8307 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8308 tu_stats
->nr_symtabs
);
8309 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8310 tu_stats
->nr_symtab_sharers
);
8311 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8312 tu_stats
->nr_stmt_less_type_units
);
8313 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8314 tu_stats
->nr_all_type_units_reallocs
);
8317 /* Traversal function for build_type_psymtabs. */
8320 build_type_psymtab_dependencies (void **slot
, void *info
)
8322 struct dwarf2_per_objfile
*dwarf2_per_objfile
8323 = (struct dwarf2_per_objfile
*) info
;
8324 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8325 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8326 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8327 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8328 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
8329 struct signatured_type
*iter
;
8332 gdb_assert (len
> 0);
8333 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8335 pst
->number_of_dependencies
= len
;
8336 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
8338 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
8341 gdb_assert (iter
->per_cu
.is_debug_types
);
8342 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8343 iter
->type_unit_group
= tu_group
;
8346 VEC_free (sig_type_ptr
, tu_group
->tus
);
8351 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8352 Build partial symbol tables for the .debug_types comp-units. */
8355 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8357 if (! create_all_type_units (dwarf2_per_objfile
))
8360 build_type_psymtabs_1 (dwarf2_per_objfile
);
8363 /* Traversal function for process_skeletonless_type_unit.
8364 Read a TU in a DWO file and build partial symbols for it. */
8367 process_skeletonless_type_unit (void **slot
, void *info
)
8369 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8370 struct dwarf2_per_objfile
*dwarf2_per_objfile
8371 = (struct dwarf2_per_objfile
*) info
;
8372 struct signatured_type find_entry
, *entry
;
8374 /* If this TU doesn't exist in the global table, add it and read it in. */
8376 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8378 dwarf2_per_objfile
->signatured_types
8379 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8382 find_entry
.signature
= dwo_unit
->signature
;
8383 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8385 /* If we've already seen this type there's nothing to do. What's happening
8386 is we're doing our own version of comdat-folding here. */
8390 /* This does the job that create_all_type_units would have done for
8392 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8393 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8396 /* This does the job that build_type_psymtabs_1 would have done. */
8397 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0, false,
8398 build_type_psymtabs_reader
, NULL
);
8403 /* Traversal function for process_skeletonless_type_units. */
8406 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8408 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8410 if (dwo_file
->tus
!= NULL
)
8412 htab_traverse_noresize (dwo_file
->tus
,
8413 process_skeletonless_type_unit
, info
);
8419 /* Scan all TUs of DWO files, verifying we've processed them.
8420 This is needed in case a TU was emitted without its skeleton.
8421 Note: This can't be done until we know what all the DWO files are. */
8424 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8426 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8427 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8428 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8430 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
8431 process_dwo_file_for_skeletonless_type_units
,
8432 dwarf2_per_objfile
);
8436 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8439 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8441 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8443 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8448 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8450 /* Set the 'user' field only if it is not already set. */
8451 if (pst
->dependencies
[j
]->user
== NULL
)
8452 pst
->dependencies
[j
]->user
= pst
;
8457 /* Build the partial symbol table by doing a quick pass through the
8458 .debug_info and .debug_abbrev sections. */
8461 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8463 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8465 if (dwarf_read_debug
)
8467 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8468 objfile_name (objfile
));
8471 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8473 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8475 /* Any cached compilation units will be linked by the per-objfile
8476 read_in_chain. Make sure to free them when we're done. */
8477 free_cached_comp_units
freer (dwarf2_per_objfile
);
8479 build_type_psymtabs (dwarf2_per_objfile
);
8481 create_all_comp_units (dwarf2_per_objfile
);
8483 /* Create a temporary address map on a temporary obstack. We later
8484 copy this to the final obstack. */
8485 auto_obstack temp_obstack
;
8487 scoped_restore save_psymtabs_addrmap
8488 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
8489 addrmap_create_mutable (&temp_obstack
));
8491 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8492 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8494 /* This has to wait until we read the CUs, we need the list of DWOs. */
8495 process_skeletonless_type_units (dwarf2_per_objfile
);
8497 /* Now that all TUs have been processed we can fill in the dependencies. */
8498 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8500 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8501 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8504 if (dwarf_read_debug
)
8505 print_tu_stats (dwarf2_per_objfile
);
8507 set_partial_user (dwarf2_per_objfile
);
8509 objfile
->partial_symtabs
->psymtabs_addrmap
8510 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
8511 objfile
->partial_symtabs
->obstack ());
8512 /* At this point we want to keep the address map. */
8513 save_psymtabs_addrmap
.release ();
8515 if (dwarf_read_debug
)
8516 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8517 objfile_name (objfile
));
8520 /* die_reader_func for load_partial_comp_unit. */
8523 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8524 const gdb_byte
*info_ptr
,
8525 struct die_info
*comp_unit_die
,
8529 struct dwarf2_cu
*cu
= reader
->cu
;
8531 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8533 /* Check if comp unit has_children.
8534 If so, read the rest of the partial symbols from this comp unit.
8535 If not, there's no more debug_info for this comp unit. */
8537 load_partial_dies (reader
, info_ptr
, 0);
8540 /* Load the partial DIEs for a secondary CU into memory.
8541 This is also used when rereading a primary CU with load_all_dies. */
8544 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8546 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, false,
8547 load_partial_comp_unit_reader
, NULL
);
8551 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8552 struct dwarf2_section_info
*section
,
8553 struct dwarf2_section_info
*abbrev_section
,
8554 unsigned int is_dwz
)
8556 const gdb_byte
*info_ptr
;
8557 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8559 if (dwarf_read_debug
)
8560 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8561 get_section_name (section
),
8562 get_section_file_name (section
));
8564 dwarf2_read_section (objfile
, section
);
8566 info_ptr
= section
->buffer
;
8568 while (info_ptr
< section
->buffer
+ section
->size
)
8570 struct dwarf2_per_cu_data
*this_cu
;
8572 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8574 comp_unit_head cu_header
;
8575 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8576 abbrev_section
, info_ptr
,
8577 rcuh_kind::COMPILE
);
8579 /* Save the compilation unit for later lookup. */
8580 if (cu_header
.unit_type
!= DW_UT_type
)
8582 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8583 struct dwarf2_per_cu_data
);
8584 memset (this_cu
, 0, sizeof (*this_cu
));
8588 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8589 struct signatured_type
);
8590 memset (sig_type
, 0, sizeof (*sig_type
));
8591 sig_type
->signature
= cu_header
.signature
;
8592 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8593 this_cu
= &sig_type
->per_cu
;
8595 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8596 this_cu
->sect_off
= sect_off
;
8597 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8598 this_cu
->is_dwz
= is_dwz
;
8599 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8600 this_cu
->section
= section
;
8602 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8604 info_ptr
= info_ptr
+ this_cu
->length
;
8608 /* Create a list of all compilation units in OBJFILE.
8609 This is only done for -readnow and building partial symtabs. */
8612 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8614 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8615 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8616 &dwarf2_per_objfile
->abbrev
, 0);
8618 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8620 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8624 /* Process all loaded DIEs for compilation unit CU, starting at
8625 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8626 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8627 DW_AT_ranges). See the comments of add_partial_subprogram on how
8628 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8631 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8632 CORE_ADDR
*highpc
, int set_addrmap
,
8633 struct dwarf2_cu
*cu
)
8635 struct partial_die_info
*pdi
;
8637 /* Now, march along the PDI's, descending into ones which have
8638 interesting children but skipping the children of the other ones,
8639 until we reach the end of the compilation unit. */
8647 /* Anonymous namespaces or modules have no name but have interesting
8648 children, so we need to look at them. Ditto for anonymous
8651 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8652 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8653 || pdi
->tag
== DW_TAG_imported_unit
8654 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8658 case DW_TAG_subprogram
:
8659 case DW_TAG_inlined_subroutine
:
8660 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8662 case DW_TAG_constant
:
8663 case DW_TAG_variable
:
8664 case DW_TAG_typedef
:
8665 case DW_TAG_union_type
:
8666 if (!pdi
->is_declaration
)
8668 add_partial_symbol (pdi
, cu
);
8671 case DW_TAG_class_type
:
8672 case DW_TAG_interface_type
:
8673 case DW_TAG_structure_type
:
8674 if (!pdi
->is_declaration
)
8676 add_partial_symbol (pdi
, cu
);
8678 if ((cu
->language
== language_rust
8679 || cu
->language
== language_cplus
) && pdi
->has_children
)
8680 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8683 case DW_TAG_enumeration_type
:
8684 if (!pdi
->is_declaration
)
8685 add_partial_enumeration (pdi
, cu
);
8687 case DW_TAG_base_type
:
8688 case DW_TAG_subrange_type
:
8689 /* File scope base type definitions are added to the partial
8691 add_partial_symbol (pdi
, cu
);
8693 case DW_TAG_namespace
:
8694 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8697 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8699 case DW_TAG_imported_unit
:
8701 struct dwarf2_per_cu_data
*per_cu
;
8703 /* For now we don't handle imported units in type units. */
8704 if (cu
->per_cu
->is_debug_types
)
8706 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8707 " supported in type units [in module %s]"),
8708 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8711 per_cu
= dwarf2_find_containing_comp_unit
8712 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8713 cu
->per_cu
->dwarf2_per_objfile
);
8715 /* Go read the partial unit, if needed. */
8716 if (per_cu
->v
.psymtab
== NULL
)
8717 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8719 VEC_safe_push (dwarf2_per_cu_ptr
,
8720 cu
->per_cu
->imported_symtabs
, per_cu
);
8723 case DW_TAG_imported_declaration
:
8724 add_partial_symbol (pdi
, cu
);
8731 /* If the die has a sibling, skip to the sibling. */
8733 pdi
= pdi
->die_sibling
;
8737 /* Functions used to compute the fully scoped name of a partial DIE.
8739 Normally, this is simple. For C++, the parent DIE's fully scoped
8740 name is concatenated with "::" and the partial DIE's name.
8741 Enumerators are an exception; they use the scope of their parent
8742 enumeration type, i.e. the name of the enumeration type is not
8743 prepended to the enumerator.
8745 There are two complexities. One is DW_AT_specification; in this
8746 case "parent" means the parent of the target of the specification,
8747 instead of the direct parent of the DIE. The other is compilers
8748 which do not emit DW_TAG_namespace; in this case we try to guess
8749 the fully qualified name of structure types from their members'
8750 linkage names. This must be done using the DIE's children rather
8751 than the children of any DW_AT_specification target. We only need
8752 to do this for structures at the top level, i.e. if the target of
8753 any DW_AT_specification (if any; otherwise the DIE itself) does not
8756 /* Compute the scope prefix associated with PDI's parent, in
8757 compilation unit CU. The result will be allocated on CU's
8758 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8759 field. NULL is returned if no prefix is necessary. */
8761 partial_die_parent_scope (struct partial_die_info
*pdi
,
8762 struct dwarf2_cu
*cu
)
8764 const char *grandparent_scope
;
8765 struct partial_die_info
*parent
, *real_pdi
;
8766 struct cu_partial_die_info res
;
8768 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8769 then this means the parent of the specification DIE. */
8772 while (real_pdi
->has_specification
)
8774 res
= find_partial_die (real_pdi
->spec_offset
,
8775 real_pdi
->spec_is_dwz
, cu
);
8780 parent
= real_pdi
->die_parent
;
8784 if (parent
->scope_set
)
8785 return parent
->scope
;
8789 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8791 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8792 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8793 Work around this problem here. */
8794 if (cu
->language
== language_cplus
8795 && parent
->tag
== DW_TAG_namespace
8796 && strcmp (parent
->name
, "::") == 0
8797 && grandparent_scope
== NULL
)
8799 parent
->scope
= NULL
;
8800 parent
->scope_set
= 1;
8804 if (pdi
->tag
== DW_TAG_enumerator
)
8805 /* Enumerators should not get the name of the enumeration as a prefix. */
8806 parent
->scope
= grandparent_scope
;
8807 else if (parent
->tag
== DW_TAG_namespace
8808 || parent
->tag
== DW_TAG_module
8809 || parent
->tag
== DW_TAG_structure_type
8810 || parent
->tag
== DW_TAG_class_type
8811 || parent
->tag
== DW_TAG_interface_type
8812 || parent
->tag
== DW_TAG_union_type
8813 || parent
->tag
== DW_TAG_enumeration_type
)
8815 if (grandparent_scope
== NULL
)
8816 parent
->scope
= parent
->name
;
8818 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8820 parent
->name
, 0, cu
);
8824 /* FIXME drow/2004-04-01: What should we be doing with
8825 function-local names? For partial symbols, we should probably be
8827 complaint (_("unhandled containing DIE tag %d for DIE at %s"),
8828 parent
->tag
, sect_offset_str (pdi
->sect_off
));
8829 parent
->scope
= grandparent_scope
;
8832 parent
->scope_set
= 1;
8833 return parent
->scope
;
8836 /* Return the fully scoped name associated with PDI, from compilation unit
8837 CU. The result will be allocated with malloc. */
8840 partial_die_full_name (struct partial_die_info
*pdi
,
8841 struct dwarf2_cu
*cu
)
8843 const char *parent_scope
;
8845 /* If this is a template instantiation, we can not work out the
8846 template arguments from partial DIEs. So, unfortunately, we have
8847 to go through the full DIEs. At least any work we do building
8848 types here will be reused if full symbols are loaded later. */
8849 if (pdi
->has_template_arguments
)
8853 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8855 struct die_info
*die
;
8856 struct attribute attr
;
8857 struct dwarf2_cu
*ref_cu
= cu
;
8859 /* DW_FORM_ref_addr is using section offset. */
8860 attr
.name
= (enum dwarf_attribute
) 0;
8861 attr
.form
= DW_FORM_ref_addr
;
8862 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8863 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8865 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8869 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8870 if (parent_scope
== NULL
)
8873 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8877 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8879 struct dwarf2_per_objfile
*dwarf2_per_objfile
8880 = cu
->per_cu
->dwarf2_per_objfile
;
8881 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8882 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8884 const char *actual_name
= NULL
;
8886 char *built_actual_name
;
8888 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8890 built_actual_name
= partial_die_full_name (pdi
, cu
);
8891 if (built_actual_name
!= NULL
)
8892 actual_name
= built_actual_name
;
8894 if (actual_name
== NULL
)
8895 actual_name
= pdi
->name
;
8899 case DW_TAG_inlined_subroutine
:
8900 case DW_TAG_subprogram
:
8901 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8903 if (pdi
->is_external
|| cu
->language
== language_ada
)
8905 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
8906 of the global scope. But in Ada, we want to be able to access
8907 nested procedures globally. So all Ada subprograms are stored
8908 in the global scope. */
8909 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8910 built_actual_name
!= NULL
,
8911 VAR_DOMAIN
, LOC_BLOCK
,
8912 SECT_OFF_TEXT (objfile
),
8913 psymbol_placement::GLOBAL
,
8915 cu
->language
, objfile
);
8919 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8920 built_actual_name
!= NULL
,
8921 VAR_DOMAIN
, LOC_BLOCK
,
8922 SECT_OFF_TEXT (objfile
),
8923 psymbol_placement::STATIC
,
8924 addr
, cu
->language
, objfile
);
8927 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8928 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8930 case DW_TAG_constant
:
8931 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8932 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8933 -1, (pdi
->is_external
8934 ? psymbol_placement::GLOBAL
8935 : psymbol_placement::STATIC
),
8936 0, cu
->language
, objfile
);
8938 case DW_TAG_variable
:
8940 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8944 && !dwarf2_per_objfile
->has_section_at_zero
)
8946 /* A global or static variable may also have been stripped
8947 out by the linker if unused, in which case its address
8948 will be nullified; do not add such variables into partial
8949 symbol table then. */
8951 else if (pdi
->is_external
)
8954 Don't enter into the minimal symbol tables as there is
8955 a minimal symbol table entry from the ELF symbols already.
8956 Enter into partial symbol table if it has a location
8957 descriptor or a type.
8958 If the location descriptor is missing, new_symbol will create
8959 a LOC_UNRESOLVED symbol, the address of the variable will then
8960 be determined from the minimal symbol table whenever the variable
8962 The address for the partial symbol table entry is not
8963 used by GDB, but it comes in handy for debugging partial symbol
8966 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8967 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8968 built_actual_name
!= NULL
,
8969 VAR_DOMAIN
, LOC_STATIC
,
8970 SECT_OFF_TEXT (objfile
),
8971 psymbol_placement::GLOBAL
,
8972 addr
, cu
->language
, objfile
);
8976 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8978 /* Static Variable. Skip symbols whose value we cannot know (those
8979 without location descriptors or constant values). */
8980 if (!has_loc
&& !pdi
->has_const_value
)
8982 xfree (built_actual_name
);
8986 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8987 built_actual_name
!= NULL
,
8988 VAR_DOMAIN
, LOC_STATIC
,
8989 SECT_OFF_TEXT (objfile
),
8990 psymbol_placement::STATIC
,
8992 cu
->language
, objfile
);
8995 case DW_TAG_typedef
:
8996 case DW_TAG_base_type
:
8997 case DW_TAG_subrange_type
:
8998 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8999 built_actual_name
!= NULL
,
9000 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
9001 psymbol_placement::STATIC
,
9002 0, cu
->language
, objfile
);
9004 case DW_TAG_imported_declaration
:
9005 case DW_TAG_namespace
:
9006 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9007 built_actual_name
!= NULL
,
9008 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
9009 psymbol_placement::GLOBAL
,
9010 0, cu
->language
, objfile
);
9013 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9014 built_actual_name
!= NULL
,
9015 MODULE_DOMAIN
, LOC_TYPEDEF
, -1,
9016 psymbol_placement::GLOBAL
,
9017 0, cu
->language
, objfile
);
9019 case DW_TAG_class_type
:
9020 case DW_TAG_interface_type
:
9021 case DW_TAG_structure_type
:
9022 case DW_TAG_union_type
:
9023 case DW_TAG_enumeration_type
:
9024 /* Skip external references. The DWARF standard says in the section
9025 about "Structure, Union, and Class Type Entries": "An incomplete
9026 structure, union or class type is represented by a structure,
9027 union or class entry that does not have a byte size attribute
9028 and that has a DW_AT_declaration attribute." */
9029 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
9031 xfree (built_actual_name
);
9035 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
9036 static vs. global. */
9037 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9038 built_actual_name
!= NULL
,
9039 STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
9040 cu
->language
== language_cplus
9041 ? psymbol_placement::GLOBAL
9042 : psymbol_placement::STATIC
,
9043 0, cu
->language
, objfile
);
9046 case DW_TAG_enumerator
:
9047 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9048 built_actual_name
!= NULL
,
9049 VAR_DOMAIN
, LOC_CONST
, -1,
9050 cu
->language
== language_cplus
9051 ? psymbol_placement::GLOBAL
9052 : psymbol_placement::STATIC
,
9053 0, cu
->language
, objfile
);
9059 xfree (built_actual_name
);
9062 /* Read a partial die corresponding to a namespace; also, add a symbol
9063 corresponding to that namespace to the symbol table. NAMESPACE is
9064 the name of the enclosing namespace. */
9067 add_partial_namespace (struct partial_die_info
*pdi
,
9068 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9069 int set_addrmap
, struct dwarf2_cu
*cu
)
9071 /* Add a symbol for the namespace. */
9073 add_partial_symbol (pdi
, cu
);
9075 /* Now scan partial symbols in that namespace. */
9077 if (pdi
->has_children
)
9078 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9081 /* Read a partial die corresponding to a Fortran module. */
9084 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
9085 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
9087 /* Add a symbol for the namespace. */
9089 add_partial_symbol (pdi
, cu
);
9091 /* Now scan partial symbols in that module. */
9093 if (pdi
->has_children
)
9094 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9097 /* Read a partial die corresponding to a subprogram or an inlined
9098 subprogram and create a partial symbol for that subprogram.
9099 When the CU language allows it, this routine also defines a partial
9100 symbol for each nested subprogram that this subprogram contains.
9101 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9102 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9104 PDI may also be a lexical block, in which case we simply search
9105 recursively for subprograms defined inside that lexical block.
9106 Again, this is only performed when the CU language allows this
9107 type of definitions. */
9110 add_partial_subprogram (struct partial_die_info
*pdi
,
9111 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9112 int set_addrmap
, struct dwarf2_cu
*cu
)
9114 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9116 if (pdi
->has_pc_info
)
9118 if (pdi
->lowpc
< *lowpc
)
9119 *lowpc
= pdi
->lowpc
;
9120 if (pdi
->highpc
> *highpc
)
9121 *highpc
= pdi
->highpc
;
9124 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9125 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9127 CORE_ADDR this_highpc
;
9128 CORE_ADDR this_lowpc
;
9130 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9131 SECT_OFF_TEXT (objfile
));
9133 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
9134 pdi
->lowpc
+ baseaddr
)
9137 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
9138 pdi
->highpc
+ baseaddr
)
9140 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
9141 this_lowpc
, this_highpc
- 1,
9142 cu
->per_cu
->v
.psymtab
);
9146 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9148 if (!pdi
->is_declaration
)
9149 /* Ignore subprogram DIEs that do not have a name, they are
9150 illegal. Do not emit a complaint at this point, we will
9151 do so when we convert this psymtab into a symtab. */
9153 add_partial_symbol (pdi
, cu
);
9157 if (! pdi
->has_children
)
9160 if (cu
->language
== language_ada
)
9162 pdi
= pdi
->die_child
;
9166 if (pdi
->tag
== DW_TAG_subprogram
9167 || pdi
->tag
== DW_TAG_inlined_subroutine
9168 || pdi
->tag
== DW_TAG_lexical_block
)
9169 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9170 pdi
= pdi
->die_sibling
;
9175 /* Read a partial die corresponding to an enumeration type. */
9178 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9179 struct dwarf2_cu
*cu
)
9181 struct partial_die_info
*pdi
;
9183 if (enum_pdi
->name
!= NULL
)
9184 add_partial_symbol (enum_pdi
, cu
);
9186 pdi
= enum_pdi
->die_child
;
9189 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9190 complaint (_("malformed enumerator DIE ignored"));
9192 add_partial_symbol (pdi
, cu
);
9193 pdi
= pdi
->die_sibling
;
9197 /* Return the initial uleb128 in the die at INFO_PTR. */
9200 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9202 unsigned int bytes_read
;
9204 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9207 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9208 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9210 Return the corresponding abbrev, or NULL if the number is zero (indicating
9211 an empty DIE). In either case *BYTES_READ will be set to the length of
9212 the initial number. */
9214 static struct abbrev_info
*
9215 peek_die_abbrev (const die_reader_specs
&reader
,
9216 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9218 dwarf2_cu
*cu
= reader
.cu
;
9219 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9220 unsigned int abbrev_number
9221 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9223 if (abbrev_number
== 0)
9226 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9229 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9230 " at offset %s [in module %s]"),
9231 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9232 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9238 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9239 Returns a pointer to the end of a series of DIEs, terminated by an empty
9240 DIE. Any children of the skipped DIEs will also be skipped. */
9242 static const gdb_byte
*
9243 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9247 unsigned int bytes_read
;
9248 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9251 return info_ptr
+ bytes_read
;
9253 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9257 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9258 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9259 abbrev corresponding to that skipped uleb128 should be passed in
9260 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9263 static const gdb_byte
*
9264 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9265 struct abbrev_info
*abbrev
)
9267 unsigned int bytes_read
;
9268 struct attribute attr
;
9269 bfd
*abfd
= reader
->abfd
;
9270 struct dwarf2_cu
*cu
= reader
->cu
;
9271 const gdb_byte
*buffer
= reader
->buffer
;
9272 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9273 unsigned int form
, i
;
9275 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9277 /* The only abbrev we care about is DW_AT_sibling. */
9278 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9280 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9281 if (attr
.form
== DW_FORM_ref_addr
)
9282 complaint (_("ignoring absolute DW_AT_sibling"));
9285 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9286 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9288 if (sibling_ptr
< info_ptr
)
9289 complaint (_("DW_AT_sibling points backwards"));
9290 else if (sibling_ptr
> reader
->buffer_end
)
9291 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9297 /* If it isn't DW_AT_sibling, skip this attribute. */
9298 form
= abbrev
->attrs
[i
].form
;
9302 case DW_FORM_ref_addr
:
9303 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9304 and later it is offset sized. */
9305 if (cu
->header
.version
== 2)
9306 info_ptr
+= cu
->header
.addr_size
;
9308 info_ptr
+= cu
->header
.offset_size
;
9310 case DW_FORM_GNU_ref_alt
:
9311 info_ptr
+= cu
->header
.offset_size
;
9314 info_ptr
+= cu
->header
.addr_size
;
9321 case DW_FORM_flag_present
:
9322 case DW_FORM_implicit_const
:
9334 case DW_FORM_ref_sig8
:
9337 case DW_FORM_data16
:
9340 case DW_FORM_string
:
9341 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9342 info_ptr
+= bytes_read
;
9344 case DW_FORM_sec_offset
:
9346 case DW_FORM_GNU_strp_alt
:
9347 info_ptr
+= cu
->header
.offset_size
;
9349 case DW_FORM_exprloc
:
9351 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9352 info_ptr
+= bytes_read
;
9354 case DW_FORM_block1
:
9355 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9357 case DW_FORM_block2
:
9358 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9360 case DW_FORM_block4
:
9361 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9367 case DW_FORM_ref_udata
:
9368 case DW_FORM_GNU_addr_index
:
9369 case DW_FORM_GNU_str_index
:
9370 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9372 case DW_FORM_indirect
:
9373 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9374 info_ptr
+= bytes_read
;
9375 /* We need to continue parsing from here, so just go back to
9377 goto skip_attribute
;
9380 error (_("Dwarf Error: Cannot handle %s "
9381 "in DWARF reader [in module %s]"),
9382 dwarf_form_name (form
),
9383 bfd_get_filename (abfd
));
9387 if (abbrev
->has_children
)
9388 return skip_children (reader
, info_ptr
);
9393 /* Locate ORIG_PDI's sibling.
9394 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9396 static const gdb_byte
*
9397 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9398 struct partial_die_info
*orig_pdi
,
9399 const gdb_byte
*info_ptr
)
9401 /* Do we know the sibling already? */
9403 if (orig_pdi
->sibling
)
9404 return orig_pdi
->sibling
;
9406 /* Are there any children to deal with? */
9408 if (!orig_pdi
->has_children
)
9411 /* Skip the children the long way. */
9413 return skip_children (reader
, info_ptr
);
9416 /* Expand this partial symbol table into a full symbol table. SELF is
9420 dwarf2_read_symtab (struct partial_symtab
*self
,
9421 struct objfile
*objfile
)
9423 struct dwarf2_per_objfile
*dwarf2_per_objfile
9424 = get_dwarf2_per_objfile (objfile
);
9428 warning (_("bug: psymtab for %s is already read in."),
9435 printf_filtered (_("Reading in symbols for %s..."),
9437 gdb_flush (gdb_stdout
);
9440 /* If this psymtab is constructed from a debug-only objfile, the
9441 has_section_at_zero flag will not necessarily be correct. We
9442 can get the correct value for this flag by looking at the data
9443 associated with the (presumably stripped) associated objfile. */
9444 if (objfile
->separate_debug_objfile_backlink
)
9446 struct dwarf2_per_objfile
*dpo_backlink
9447 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9449 dwarf2_per_objfile
->has_section_at_zero
9450 = dpo_backlink
->has_section_at_zero
;
9453 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9455 psymtab_to_symtab_1 (self
);
9457 /* Finish up the debug error message. */
9459 printf_filtered (_("done.\n"));
9462 process_cu_includes (dwarf2_per_objfile
);
9465 /* Reading in full CUs. */
9467 /* Add PER_CU to the queue. */
9470 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9471 enum language pretend_language
)
9473 struct dwarf2_queue_item
*item
;
9476 item
= XNEW (struct dwarf2_queue_item
);
9477 item
->per_cu
= per_cu
;
9478 item
->pretend_language
= pretend_language
;
9481 if (dwarf2_queue
== NULL
)
9482 dwarf2_queue
= item
;
9484 dwarf2_queue_tail
->next
= item
;
9486 dwarf2_queue_tail
= item
;
9489 /* If PER_CU is not yet queued, add it to the queue.
9490 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9492 The result is non-zero if PER_CU was queued, otherwise the result is zero
9493 meaning either PER_CU is already queued or it is already loaded.
9495 N.B. There is an invariant here that if a CU is queued then it is loaded.
9496 The caller is required to load PER_CU if we return non-zero. */
9499 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9500 struct dwarf2_per_cu_data
*per_cu
,
9501 enum language pretend_language
)
9503 /* We may arrive here during partial symbol reading, if we need full
9504 DIEs to process an unusual case (e.g. template arguments). Do
9505 not queue PER_CU, just tell our caller to load its DIEs. */
9506 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9508 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9513 /* Mark the dependence relation so that we don't flush PER_CU
9515 if (dependent_cu
!= NULL
)
9516 dwarf2_add_dependence (dependent_cu
, per_cu
);
9518 /* If it's already on the queue, we have nothing to do. */
9522 /* If the compilation unit is already loaded, just mark it as
9524 if (per_cu
->cu
!= NULL
)
9526 per_cu
->cu
->last_used
= 0;
9530 /* Add it to the queue. */
9531 queue_comp_unit (per_cu
, pretend_language
);
9536 /* Process the queue. */
9539 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9541 struct dwarf2_queue_item
*item
, *next_item
;
9543 if (dwarf_read_debug
)
9545 fprintf_unfiltered (gdb_stdlog
,
9546 "Expanding one or more symtabs of objfile %s ...\n",
9547 objfile_name (dwarf2_per_objfile
->objfile
));
9550 /* The queue starts out with one item, but following a DIE reference
9551 may load a new CU, adding it to the end of the queue. */
9552 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9554 if ((dwarf2_per_objfile
->using_index
9555 ? !item
->per_cu
->v
.quick
->compunit_symtab
9556 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9557 /* Skip dummy CUs. */
9558 && item
->per_cu
->cu
!= NULL
)
9560 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9561 unsigned int debug_print_threshold
;
9564 if (per_cu
->is_debug_types
)
9566 struct signatured_type
*sig_type
=
9567 (struct signatured_type
*) per_cu
;
9569 sprintf (buf
, "TU %s at offset %s",
9570 hex_string (sig_type
->signature
),
9571 sect_offset_str (per_cu
->sect_off
));
9572 /* There can be 100s of TUs.
9573 Only print them in verbose mode. */
9574 debug_print_threshold
= 2;
9578 sprintf (buf
, "CU at offset %s",
9579 sect_offset_str (per_cu
->sect_off
));
9580 debug_print_threshold
= 1;
9583 if (dwarf_read_debug
>= debug_print_threshold
)
9584 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9586 if (per_cu
->is_debug_types
)
9587 process_full_type_unit (per_cu
, item
->pretend_language
);
9589 process_full_comp_unit (per_cu
, item
->pretend_language
);
9591 if (dwarf_read_debug
>= debug_print_threshold
)
9592 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9595 item
->per_cu
->queued
= 0;
9596 next_item
= item
->next
;
9600 dwarf2_queue_tail
= NULL
;
9602 if (dwarf_read_debug
)
9604 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9605 objfile_name (dwarf2_per_objfile
->objfile
));
9609 /* Read in full symbols for PST, and anything it depends on. */
9612 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9614 struct dwarf2_per_cu_data
*per_cu
;
9620 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9621 if (!pst
->dependencies
[i
]->readin
9622 && pst
->dependencies
[i
]->user
== NULL
)
9624 /* Inform about additional files that need to be read in. */
9627 /* FIXME: i18n: Need to make this a single string. */
9628 fputs_filtered (" ", gdb_stdout
);
9630 fputs_filtered ("and ", gdb_stdout
);
9632 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9633 wrap_here (""); /* Flush output. */
9634 gdb_flush (gdb_stdout
);
9636 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9639 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9643 /* It's an include file, no symbols to read for it.
9644 Everything is in the parent symtab. */
9649 dw2_do_instantiate_symtab (per_cu
, false);
9652 /* Trivial hash function for die_info: the hash value of a DIE
9653 is its offset in .debug_info for this objfile. */
9656 die_hash (const void *item
)
9658 const struct die_info
*die
= (const struct die_info
*) item
;
9660 return to_underlying (die
->sect_off
);
9663 /* Trivial comparison function for die_info structures: two DIEs
9664 are equal if they have the same offset. */
9667 die_eq (const void *item_lhs
, const void *item_rhs
)
9669 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9670 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9672 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9675 /* die_reader_func for load_full_comp_unit.
9676 This is identical to read_signatured_type_reader,
9677 but is kept separate for now. */
9680 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9681 const gdb_byte
*info_ptr
,
9682 struct die_info
*comp_unit_die
,
9686 struct dwarf2_cu
*cu
= reader
->cu
;
9687 enum language
*language_ptr
= (enum language
*) data
;
9689 gdb_assert (cu
->die_hash
== NULL
);
9691 htab_create_alloc_ex (cu
->header
.length
/ 12,
9695 &cu
->comp_unit_obstack
,
9696 hashtab_obstack_allocate
,
9697 dummy_obstack_deallocate
);
9700 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9701 &info_ptr
, comp_unit_die
);
9702 cu
->dies
= comp_unit_die
;
9703 /* comp_unit_die is not stored in die_hash, no need. */
9705 /* We try not to read any attributes in this function, because not
9706 all CUs needed for references have been loaded yet, and symbol
9707 table processing isn't initialized. But we have to set the CU language,
9708 or we won't be able to build types correctly.
9709 Similarly, if we do not read the producer, we can not apply
9710 producer-specific interpretation. */
9711 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9714 /* Load the DIEs associated with PER_CU into memory. */
9717 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9719 enum language pretend_language
)
9721 gdb_assert (! this_cu
->is_debug_types
);
9723 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, skip_partial
,
9724 load_full_comp_unit_reader
, &pretend_language
);
9727 /* Add a DIE to the delayed physname list. */
9730 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9731 const char *name
, struct die_info
*die
,
9732 struct dwarf2_cu
*cu
)
9734 struct delayed_method_info mi
;
9736 mi
.fnfield_index
= fnfield_index
;
9740 cu
->method_list
.push_back (mi
);
9743 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9744 "const" / "volatile". If so, decrements LEN by the length of the
9745 modifier and return true. Otherwise return false. */
9749 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9751 size_t mod_len
= sizeof (mod
) - 1;
9752 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9760 /* Compute the physnames of any methods on the CU's method list.
9762 The computation of method physnames is delayed in order to avoid the
9763 (bad) condition that one of the method's formal parameters is of an as yet
9767 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9769 /* Only C++ delays computing physnames. */
9770 if (cu
->method_list
.empty ())
9772 gdb_assert (cu
->language
== language_cplus
);
9774 for (const delayed_method_info
&mi
: cu
->method_list
)
9776 const char *physname
;
9777 struct fn_fieldlist
*fn_flp
9778 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9779 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9780 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9781 = physname
? physname
: "";
9783 /* Since there's no tag to indicate whether a method is a
9784 const/volatile overload, extract that information out of the
9786 if (physname
!= NULL
)
9788 size_t len
= strlen (physname
);
9792 if (physname
[len
] == ')') /* shortcut */
9794 else if (check_modifier (physname
, len
, " const"))
9795 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9796 else if (check_modifier (physname
, len
, " volatile"))
9797 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9804 /* The list is no longer needed. */
9805 cu
->method_list
.clear ();
9808 /* Go objects should be embedded in a DW_TAG_module DIE,
9809 and it's not clear if/how imported objects will appear.
9810 To keep Go support simple until that's worked out,
9811 go back through what we've read and create something usable.
9812 We could do this while processing each DIE, and feels kinda cleaner,
9813 but that way is more invasive.
9814 This is to, for example, allow the user to type "p var" or "b main"
9815 without having to specify the package name, and allow lookups
9816 of module.object to work in contexts that use the expression
9820 fixup_go_packaging (struct dwarf2_cu
*cu
)
9822 char *package_name
= NULL
;
9823 struct pending
*list
;
9826 for (list
= *cu
->get_builder ()->get_global_symbols ();
9830 for (i
= 0; i
< list
->nsyms
; ++i
)
9832 struct symbol
*sym
= list
->symbol
[i
];
9834 if (SYMBOL_LANGUAGE (sym
) == language_go
9835 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9837 char *this_package_name
= go_symbol_package_name (sym
);
9839 if (this_package_name
== NULL
)
9841 if (package_name
== NULL
)
9842 package_name
= this_package_name
;
9845 struct objfile
*objfile
9846 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9847 if (strcmp (package_name
, this_package_name
) != 0)
9848 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9849 (symbol_symtab (sym
) != NULL
9850 ? symtab_to_filename_for_display
9851 (symbol_symtab (sym
))
9852 : objfile_name (objfile
)),
9853 this_package_name
, package_name
);
9854 xfree (this_package_name
);
9860 if (package_name
!= NULL
)
9862 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9863 const char *saved_package_name
9864 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9866 strlen (package_name
));
9867 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9868 saved_package_name
);
9871 sym
= allocate_symbol (objfile
);
9872 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9873 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9874 strlen (saved_package_name
), 0, objfile
);
9875 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9876 e.g., "main" finds the "main" module and not C's main(). */
9877 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9878 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9879 SYMBOL_TYPE (sym
) = type
;
9881 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9883 xfree (package_name
);
9887 /* Allocate a fully-qualified name consisting of the two parts on the
9891 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9893 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9896 /* A helper that allocates a struct discriminant_info to attach to a
9899 static struct discriminant_info
*
9900 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9903 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9904 gdb_assert (discriminant_index
== -1
9905 || (discriminant_index
>= 0
9906 && discriminant_index
< TYPE_NFIELDS (type
)));
9907 gdb_assert (default_index
== -1
9908 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9910 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9912 struct discriminant_info
*disc
9913 = ((struct discriminant_info
*)
9915 offsetof (struct discriminant_info
, discriminants
)
9916 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9917 disc
->default_index
= default_index
;
9918 disc
->discriminant_index
= discriminant_index
;
9920 struct dynamic_prop prop
;
9921 prop
.kind
= PROP_UNDEFINED
;
9922 prop
.data
.baton
= disc
;
9924 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9929 /* Some versions of rustc emitted enums in an unusual way.
9931 Ordinary enums were emitted as unions. The first element of each
9932 structure in the union was named "RUST$ENUM$DISR". This element
9933 held the discriminant.
9935 These versions of Rust also implemented the "non-zero"
9936 optimization. When the enum had two values, and one is empty and
9937 the other holds a pointer that cannot be zero, the pointer is used
9938 as the discriminant, with a zero value meaning the empty variant.
9939 Here, the union's first member is of the form
9940 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9941 where the fieldnos are the indices of the fields that should be
9942 traversed in order to find the field (which may be several fields deep)
9943 and the variantname is the name of the variant of the case when the
9946 This function recognizes whether TYPE is of one of these forms,
9947 and, if so, smashes it to be a variant type. */
9950 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9952 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9954 /* We don't need to deal with empty enums. */
9955 if (TYPE_NFIELDS (type
) == 0)
9958 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9959 if (TYPE_NFIELDS (type
) == 1
9960 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9962 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9964 /* Decode the field name to find the offset of the
9966 ULONGEST bit_offset
= 0;
9967 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9968 while (name
[0] >= '0' && name
[0] <= '9')
9971 unsigned long index
= strtoul (name
, &tail
, 10);
9974 || index
>= TYPE_NFIELDS (field_type
)
9975 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9976 != FIELD_LOC_KIND_BITPOS
))
9978 complaint (_("Could not parse Rust enum encoding string \"%s\""
9980 TYPE_FIELD_NAME (type
, 0),
9981 objfile_name (objfile
));
9986 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9987 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9990 /* Make a union to hold the variants. */
9991 struct type
*union_type
= alloc_type (objfile
);
9992 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9993 TYPE_NFIELDS (union_type
) = 3;
9994 TYPE_FIELDS (union_type
)
9995 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9996 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9997 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9999 /* Put the discriminant must at index 0. */
10000 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
10001 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10002 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10003 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
10005 /* The order of fields doesn't really matter, so put the real
10006 field at index 1 and the data-less field at index 2. */
10007 struct discriminant_info
*disc
10008 = alloc_discriminant_info (union_type
, 0, 1);
10009 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
10010 TYPE_FIELD_NAME (union_type
, 1)
10011 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
10012 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
10013 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
10014 TYPE_FIELD_NAME (union_type
, 1));
10016 const char *dataless_name
10017 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
10019 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
10021 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
10022 /* NAME points into the original discriminant name, which
10023 already has the correct lifetime. */
10024 TYPE_FIELD_NAME (union_type
, 2) = name
;
10025 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
10026 disc
->discriminants
[2] = 0;
10028 /* Smash this type to be a structure type. We have to do this
10029 because the type has already been recorded. */
10030 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10031 TYPE_NFIELDS (type
) = 1;
10033 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
10035 /* Install the variant part. */
10036 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10037 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10038 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10040 else if (TYPE_NFIELDS (type
) == 1)
10042 /* We assume that a union with a single field is a univariant
10044 /* Smash this type to be a structure type. We have to do this
10045 because the type has already been recorded. */
10046 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10048 /* Make a union to hold the variants. */
10049 struct type
*union_type
= alloc_type (objfile
);
10050 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10051 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
10052 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10053 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10054 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
10056 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
10057 const char *variant_name
10058 = rust_last_path_segment (TYPE_NAME (field_type
));
10059 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
10060 TYPE_NAME (field_type
)
10061 = rust_fully_qualify (&objfile
->objfile_obstack
,
10062 TYPE_NAME (type
), variant_name
);
10064 /* Install the union in the outer struct type. */
10065 TYPE_NFIELDS (type
) = 1;
10067 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
10068 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10069 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10070 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10072 alloc_discriminant_info (union_type
, -1, 0);
10076 struct type
*disr_type
= nullptr;
10077 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
10079 disr_type
= TYPE_FIELD_TYPE (type
, i
);
10081 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
10083 /* All fields of a true enum will be structs. */
10086 else if (TYPE_NFIELDS (disr_type
) == 0)
10088 /* Could be data-less variant, so keep going. */
10089 disr_type
= nullptr;
10091 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
10092 "RUST$ENUM$DISR") != 0)
10094 /* Not a Rust enum. */
10104 /* If we got here without a discriminant, then it's probably
10106 if (disr_type
== nullptr)
10109 /* Smash this type to be a structure type. We have to do this
10110 because the type has already been recorded. */
10111 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10113 /* Make a union to hold the variants. */
10114 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10115 struct type
*union_type
= alloc_type (objfile
);
10116 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10117 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10118 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10119 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10120 TYPE_FIELDS (union_type
)
10121 = (struct field
*) TYPE_ZALLOC (union_type
,
10122 (TYPE_NFIELDS (union_type
)
10123 * sizeof (struct field
)));
10125 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10126 TYPE_NFIELDS (type
) * sizeof (struct field
));
10128 /* Install the discriminant at index 0 in the union. */
10129 TYPE_FIELD (union_type
, 0) = *disr_field
;
10130 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10131 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10133 /* Install the union in the outer struct type. */
10134 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10135 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10136 TYPE_NFIELDS (type
) = 1;
10138 /* Set the size and offset of the union type. */
10139 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10141 /* We need a way to find the correct discriminant given a
10142 variant name. For convenience we build a map here. */
10143 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10144 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10145 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10147 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10150 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10151 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10155 int n_fields
= TYPE_NFIELDS (union_type
);
10156 struct discriminant_info
*disc
10157 = alloc_discriminant_info (union_type
, 0, -1);
10158 /* Skip the discriminant here. */
10159 for (int i
= 1; i
< n_fields
; ++i
)
10161 /* Find the final word in the name of this variant's type.
10162 That name can be used to look up the correct
10164 const char *variant_name
10165 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10168 auto iter
= discriminant_map
.find (variant_name
);
10169 if (iter
!= discriminant_map
.end ())
10170 disc
->discriminants
[i
] = iter
->second
;
10172 /* Remove the discriminant field, if it exists. */
10173 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10174 if (TYPE_NFIELDS (sub_type
) > 0)
10176 --TYPE_NFIELDS (sub_type
);
10177 ++TYPE_FIELDS (sub_type
);
10179 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10180 TYPE_NAME (sub_type
)
10181 = rust_fully_qualify (&objfile
->objfile_obstack
,
10182 TYPE_NAME (type
), variant_name
);
10187 /* Rewrite some Rust unions to be structures with variants parts. */
10190 rust_union_quirks (struct dwarf2_cu
*cu
)
10192 gdb_assert (cu
->language
== language_rust
);
10193 for (type
*type_
: cu
->rust_unions
)
10194 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10195 /* We don't need this any more. */
10196 cu
->rust_unions
.clear ();
10199 /* Return the symtab for PER_CU. This works properly regardless of
10200 whether we're using the index or psymtabs. */
10202 static struct compunit_symtab
*
10203 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10205 return (per_cu
->dwarf2_per_objfile
->using_index
10206 ? per_cu
->v
.quick
->compunit_symtab
10207 : per_cu
->v
.psymtab
->compunit_symtab
);
10210 /* A helper function for computing the list of all symbol tables
10211 included by PER_CU. */
10214 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
10215 htab_t all_children
, htab_t all_type_symtabs
,
10216 struct dwarf2_per_cu_data
*per_cu
,
10217 struct compunit_symtab
*immediate_parent
)
10221 struct compunit_symtab
*cust
;
10222 struct dwarf2_per_cu_data
*iter
;
10224 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10227 /* This inclusion and its children have been processed. */
10232 /* Only add a CU if it has a symbol table. */
10233 cust
= get_compunit_symtab (per_cu
);
10236 /* If this is a type unit only add its symbol table if we haven't
10237 seen it yet (type unit per_cu's can share symtabs). */
10238 if (per_cu
->is_debug_types
)
10240 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10244 result
->push_back (cust
);
10245 if (cust
->user
== NULL
)
10246 cust
->user
= immediate_parent
;
10251 result
->push_back (cust
);
10252 if (cust
->user
== NULL
)
10253 cust
->user
= immediate_parent
;
10258 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10261 recursively_compute_inclusions (result
, all_children
,
10262 all_type_symtabs
, iter
, cust
);
10266 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10270 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10272 gdb_assert (! per_cu
->is_debug_types
);
10274 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10277 struct dwarf2_per_cu_data
*per_cu_iter
;
10278 std::vector
<compunit_symtab
*> result_symtabs
;
10279 htab_t all_children
, all_type_symtabs
;
10280 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10282 /* If we don't have a symtab, we can just skip this case. */
10286 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10287 NULL
, xcalloc
, xfree
);
10288 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10289 NULL
, xcalloc
, xfree
);
10292 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10296 recursively_compute_inclusions (&result_symtabs
, all_children
,
10297 all_type_symtabs
, per_cu_iter
,
10301 /* Now we have a transitive closure of all the included symtabs. */
10302 len
= result_symtabs
.size ();
10304 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10305 struct compunit_symtab
*, len
+ 1);
10306 memcpy (cust
->includes
, result_symtabs
.data (),
10307 len
* sizeof (compunit_symtab
*));
10308 cust
->includes
[len
] = NULL
;
10310 htab_delete (all_children
);
10311 htab_delete (all_type_symtabs
);
10315 /* Compute the 'includes' field for the symtabs of all the CUs we just
10319 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10321 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
10323 if (! iter
->is_debug_types
)
10324 compute_compunit_symtab_includes (iter
);
10327 dwarf2_per_objfile
->just_read_cus
.clear ();
10330 /* Generate full symbol information for PER_CU, whose DIEs have
10331 already been loaded into memory. */
10334 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10335 enum language pretend_language
)
10337 struct dwarf2_cu
*cu
= per_cu
->cu
;
10338 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10339 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10340 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10341 CORE_ADDR lowpc
, highpc
;
10342 struct compunit_symtab
*cust
;
10343 CORE_ADDR baseaddr
;
10344 struct block
*static_block
;
10347 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10349 /* Clear the list here in case something was left over. */
10350 cu
->method_list
.clear ();
10352 cu
->language
= pretend_language
;
10353 cu
->language_defn
= language_def (cu
->language
);
10355 /* Do line number decoding in read_file_scope () */
10356 process_die (cu
->dies
, cu
);
10358 /* For now fudge the Go package. */
10359 if (cu
->language
== language_go
)
10360 fixup_go_packaging (cu
);
10362 /* Now that we have processed all the DIEs in the CU, all the types
10363 should be complete, and it should now be safe to compute all of the
10365 compute_delayed_physnames (cu
);
10367 if (cu
->language
== language_rust
)
10368 rust_union_quirks (cu
);
10370 /* Some compilers don't define a DW_AT_high_pc attribute for the
10371 compilation unit. If the DW_AT_high_pc is missing, synthesize
10372 it, by scanning the DIE's below the compilation unit. */
10373 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10375 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10376 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
10378 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10379 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10380 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10381 addrmap to help ensure it has an accurate map of pc values belonging to
10383 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10385 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
10386 SECT_OFF_TEXT (objfile
),
10391 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10393 /* Set symtab language to language from DW_AT_language. If the
10394 compilation is from a C file generated by language preprocessors, do
10395 not set the language if it was already deduced by start_subfile. */
10396 if (!(cu
->language
== language_c
10397 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10398 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10400 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10401 produce DW_AT_location with location lists but it can be possibly
10402 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10403 there were bugs in prologue debug info, fixed later in GCC-4.5
10404 by "unwind info for epilogues" patch (which is not directly related).
10406 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10407 needed, it would be wrong due to missing DW_AT_producer there.
10409 Still one can confuse GDB by using non-standard GCC compilation
10410 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10412 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10413 cust
->locations_valid
= 1;
10415 if (gcc_4_minor
>= 5)
10416 cust
->epilogue_unwind_valid
= 1;
10418 cust
->call_site_htab
= cu
->call_site_htab
;
10421 if (dwarf2_per_objfile
->using_index
)
10422 per_cu
->v
.quick
->compunit_symtab
= cust
;
10425 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10426 pst
->compunit_symtab
= cust
;
10430 /* Push it for inclusion processing later. */
10431 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
10433 /* Not needed any more. */
10434 cu
->reset_builder ();
10437 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10438 already been loaded into memory. */
10441 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10442 enum language pretend_language
)
10444 struct dwarf2_cu
*cu
= per_cu
->cu
;
10445 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10446 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10447 struct compunit_symtab
*cust
;
10448 struct signatured_type
*sig_type
;
10450 gdb_assert (per_cu
->is_debug_types
);
10451 sig_type
= (struct signatured_type
*) per_cu
;
10453 /* Clear the list here in case something was left over. */
10454 cu
->method_list
.clear ();
10456 cu
->language
= pretend_language
;
10457 cu
->language_defn
= language_def (cu
->language
);
10459 /* The symbol tables are set up in read_type_unit_scope. */
10460 process_die (cu
->dies
, cu
);
10462 /* For now fudge the Go package. */
10463 if (cu
->language
== language_go
)
10464 fixup_go_packaging (cu
);
10466 /* Now that we have processed all the DIEs in the CU, all the types
10467 should be complete, and it should now be safe to compute all of the
10469 compute_delayed_physnames (cu
);
10471 if (cu
->language
== language_rust
)
10472 rust_union_quirks (cu
);
10474 /* TUs share symbol tables.
10475 If this is the first TU to use this symtab, complete the construction
10476 of it with end_expandable_symtab. Otherwise, complete the addition of
10477 this TU's symbols to the existing symtab. */
10478 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10480 buildsym_compunit
*builder
= cu
->get_builder ();
10481 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10482 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10486 /* Set symtab language to language from DW_AT_language. If the
10487 compilation is from a C file generated by language preprocessors,
10488 do not set the language if it was already deduced by
10490 if (!(cu
->language
== language_c
10491 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10492 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10497 cu
->get_builder ()->augment_type_symtab ();
10498 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10501 if (dwarf2_per_objfile
->using_index
)
10502 per_cu
->v
.quick
->compunit_symtab
= cust
;
10505 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10506 pst
->compunit_symtab
= cust
;
10510 /* Not needed any more. */
10511 cu
->reset_builder ();
10514 /* Process an imported unit DIE. */
10517 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10519 struct attribute
*attr
;
10521 /* For now we don't handle imported units in type units. */
10522 if (cu
->per_cu
->is_debug_types
)
10524 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10525 " supported in type units [in module %s]"),
10526 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10529 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10532 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10533 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10534 dwarf2_per_cu_data
*per_cu
10535 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10536 cu
->per_cu
->dwarf2_per_objfile
);
10538 /* If necessary, add it to the queue and load its DIEs. */
10539 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10540 load_full_comp_unit (per_cu
, false, cu
->language
);
10542 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10547 /* RAII object that represents a process_die scope: i.e.,
10548 starts/finishes processing a DIE. */
10549 class process_die_scope
10552 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10553 : m_die (die
), m_cu (cu
)
10555 /* We should only be processing DIEs not already in process. */
10556 gdb_assert (!m_die
->in_process
);
10557 m_die
->in_process
= true;
10560 ~process_die_scope ()
10562 m_die
->in_process
= false;
10564 /* If we're done processing the DIE for the CU that owns the line
10565 header, we don't need the line header anymore. */
10566 if (m_cu
->line_header_die_owner
== m_die
)
10568 delete m_cu
->line_header
;
10569 m_cu
->line_header
= NULL
;
10570 m_cu
->line_header_die_owner
= NULL
;
10579 /* Process a die and its children. */
10582 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10584 process_die_scope
scope (die
, cu
);
10588 case DW_TAG_padding
:
10590 case DW_TAG_compile_unit
:
10591 case DW_TAG_partial_unit
:
10592 read_file_scope (die
, cu
);
10594 case DW_TAG_type_unit
:
10595 read_type_unit_scope (die
, cu
);
10597 case DW_TAG_subprogram
:
10598 case DW_TAG_inlined_subroutine
:
10599 read_func_scope (die
, cu
);
10601 case DW_TAG_lexical_block
:
10602 case DW_TAG_try_block
:
10603 case DW_TAG_catch_block
:
10604 read_lexical_block_scope (die
, cu
);
10606 case DW_TAG_call_site
:
10607 case DW_TAG_GNU_call_site
:
10608 read_call_site_scope (die
, cu
);
10610 case DW_TAG_class_type
:
10611 case DW_TAG_interface_type
:
10612 case DW_TAG_structure_type
:
10613 case DW_TAG_union_type
:
10614 process_structure_scope (die
, cu
);
10616 case DW_TAG_enumeration_type
:
10617 process_enumeration_scope (die
, cu
);
10620 /* These dies have a type, but processing them does not create
10621 a symbol or recurse to process the children. Therefore we can
10622 read them on-demand through read_type_die. */
10623 case DW_TAG_subroutine_type
:
10624 case DW_TAG_set_type
:
10625 case DW_TAG_array_type
:
10626 case DW_TAG_pointer_type
:
10627 case DW_TAG_ptr_to_member_type
:
10628 case DW_TAG_reference_type
:
10629 case DW_TAG_rvalue_reference_type
:
10630 case DW_TAG_string_type
:
10633 case DW_TAG_base_type
:
10634 case DW_TAG_subrange_type
:
10635 case DW_TAG_typedef
:
10636 /* Add a typedef symbol for the type definition, if it has a
10638 new_symbol (die
, read_type_die (die
, cu
), cu
);
10640 case DW_TAG_common_block
:
10641 read_common_block (die
, cu
);
10643 case DW_TAG_common_inclusion
:
10645 case DW_TAG_namespace
:
10646 cu
->processing_has_namespace_info
= true;
10647 read_namespace (die
, cu
);
10649 case DW_TAG_module
:
10650 cu
->processing_has_namespace_info
= true;
10651 read_module (die
, cu
);
10653 case DW_TAG_imported_declaration
:
10654 cu
->processing_has_namespace_info
= true;
10655 if (read_namespace_alias (die
, cu
))
10657 /* The declaration is not a global namespace alias. */
10658 /* Fall through. */
10659 case DW_TAG_imported_module
:
10660 cu
->processing_has_namespace_info
= true;
10661 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10662 || cu
->language
!= language_fortran
))
10663 complaint (_("Tag '%s' has unexpected children"),
10664 dwarf_tag_name (die
->tag
));
10665 read_import_statement (die
, cu
);
10668 case DW_TAG_imported_unit
:
10669 process_imported_unit_die (die
, cu
);
10672 case DW_TAG_variable
:
10673 read_variable (die
, cu
);
10677 new_symbol (die
, NULL
, cu
);
10682 /* DWARF name computation. */
10684 /* A helper function for dwarf2_compute_name which determines whether DIE
10685 needs to have the name of the scope prepended to the name listed in the
10689 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10691 struct attribute
*attr
;
10695 case DW_TAG_namespace
:
10696 case DW_TAG_typedef
:
10697 case DW_TAG_class_type
:
10698 case DW_TAG_interface_type
:
10699 case DW_TAG_structure_type
:
10700 case DW_TAG_union_type
:
10701 case DW_TAG_enumeration_type
:
10702 case DW_TAG_enumerator
:
10703 case DW_TAG_subprogram
:
10704 case DW_TAG_inlined_subroutine
:
10705 case DW_TAG_member
:
10706 case DW_TAG_imported_declaration
:
10709 case DW_TAG_variable
:
10710 case DW_TAG_constant
:
10711 /* We only need to prefix "globally" visible variables. These include
10712 any variable marked with DW_AT_external or any variable that
10713 lives in a namespace. [Variables in anonymous namespaces
10714 require prefixing, but they are not DW_AT_external.] */
10716 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10718 struct dwarf2_cu
*spec_cu
= cu
;
10720 return die_needs_namespace (die_specification (die
, &spec_cu
),
10724 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10725 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10726 && die
->parent
->tag
!= DW_TAG_module
)
10728 /* A variable in a lexical block of some kind does not need a
10729 namespace, even though in C++ such variables may be external
10730 and have a mangled name. */
10731 if (die
->parent
->tag
== DW_TAG_lexical_block
10732 || die
->parent
->tag
== DW_TAG_try_block
10733 || die
->parent
->tag
== DW_TAG_catch_block
10734 || die
->parent
->tag
== DW_TAG_subprogram
)
10743 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10744 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10745 defined for the given DIE. */
10747 static struct attribute
*
10748 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10750 struct attribute
*attr
;
10752 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10754 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10759 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10760 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10761 defined for the given DIE. */
10763 static const char *
10764 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10766 const char *linkage_name
;
10768 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10769 if (linkage_name
== NULL
)
10770 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10772 return linkage_name
;
10775 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10776 compute the physname for the object, which include a method's:
10777 - formal parameters (C++),
10778 - receiver type (Go),
10780 The term "physname" is a bit confusing.
10781 For C++, for example, it is the demangled name.
10782 For Go, for example, it's the mangled name.
10784 For Ada, return the DIE's linkage name rather than the fully qualified
10785 name. PHYSNAME is ignored..
10787 The result is allocated on the objfile_obstack and canonicalized. */
10789 static const char *
10790 dwarf2_compute_name (const char *name
,
10791 struct die_info
*die
, struct dwarf2_cu
*cu
,
10794 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10797 name
= dwarf2_name (die
, cu
);
10799 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10800 but otherwise compute it by typename_concat inside GDB.
10801 FIXME: Actually this is not really true, or at least not always true.
10802 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10803 Fortran names because there is no mangling standard. So new_symbol
10804 will set the demangled name to the result of dwarf2_full_name, and it is
10805 the demangled name that GDB uses if it exists. */
10806 if (cu
->language
== language_ada
10807 || (cu
->language
== language_fortran
&& physname
))
10809 /* For Ada unit, we prefer the linkage name over the name, as
10810 the former contains the exported name, which the user expects
10811 to be able to reference. Ideally, we want the user to be able
10812 to reference this entity using either natural or linkage name,
10813 but we haven't started looking at this enhancement yet. */
10814 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10816 if (linkage_name
!= NULL
)
10817 return linkage_name
;
10820 /* These are the only languages we know how to qualify names in. */
10822 && (cu
->language
== language_cplus
10823 || cu
->language
== language_fortran
|| cu
->language
== language_d
10824 || cu
->language
== language_rust
))
10826 if (die_needs_namespace (die
, cu
))
10828 const char *prefix
;
10829 const char *canonical_name
= NULL
;
10833 prefix
= determine_prefix (die
, cu
);
10834 if (*prefix
!= '\0')
10836 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10839 buf
.puts (prefixed_name
);
10840 xfree (prefixed_name
);
10845 /* Template parameters may be specified in the DIE's DW_AT_name, or
10846 as children with DW_TAG_template_type_param or
10847 DW_TAG_value_type_param. If the latter, add them to the name
10848 here. If the name already has template parameters, then
10849 skip this step; some versions of GCC emit both, and
10850 it is more efficient to use the pre-computed name.
10852 Something to keep in mind about this process: it is very
10853 unlikely, or in some cases downright impossible, to produce
10854 something that will match the mangled name of a function.
10855 If the definition of the function has the same debug info,
10856 we should be able to match up with it anyway. But fallbacks
10857 using the minimal symbol, for instance to find a method
10858 implemented in a stripped copy of libstdc++, will not work.
10859 If we do not have debug info for the definition, we will have to
10860 match them up some other way.
10862 When we do name matching there is a related problem with function
10863 templates; two instantiated function templates are allowed to
10864 differ only by their return types, which we do not add here. */
10866 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10868 struct attribute
*attr
;
10869 struct die_info
*child
;
10872 die
->building_fullname
= 1;
10874 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10878 const gdb_byte
*bytes
;
10879 struct dwarf2_locexpr_baton
*baton
;
10882 if (child
->tag
!= DW_TAG_template_type_param
10883 && child
->tag
!= DW_TAG_template_value_param
)
10894 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10897 complaint (_("template parameter missing DW_AT_type"));
10898 buf
.puts ("UNKNOWN_TYPE");
10901 type
= die_type (child
, cu
);
10903 if (child
->tag
== DW_TAG_template_type_param
)
10905 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10906 &type_print_raw_options
);
10910 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10913 complaint (_("template parameter missing "
10914 "DW_AT_const_value"));
10915 buf
.puts ("UNKNOWN_VALUE");
10919 dwarf2_const_value_attr (attr
, type
, name
,
10920 &cu
->comp_unit_obstack
, cu
,
10921 &value
, &bytes
, &baton
);
10923 if (TYPE_NOSIGN (type
))
10924 /* GDB prints characters as NUMBER 'CHAR'. If that's
10925 changed, this can use value_print instead. */
10926 c_printchar (value
, type
, &buf
);
10929 struct value_print_options opts
;
10932 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10936 else if (bytes
!= NULL
)
10938 v
= allocate_value (type
);
10939 memcpy (value_contents_writeable (v
), bytes
,
10940 TYPE_LENGTH (type
));
10943 v
= value_from_longest (type
, value
);
10945 /* Specify decimal so that we do not depend on
10947 get_formatted_print_options (&opts
, 'd');
10949 value_print (v
, &buf
, &opts
);
10954 die
->building_fullname
= 0;
10958 /* Close the argument list, with a space if necessary
10959 (nested templates). */
10960 if (!buf
.empty () && buf
.string ().back () == '>')
10967 /* For C++ methods, append formal parameter type
10968 information, if PHYSNAME. */
10970 if (physname
&& die
->tag
== DW_TAG_subprogram
10971 && cu
->language
== language_cplus
)
10973 struct type
*type
= read_type_die (die
, cu
);
10975 c_type_print_args (type
, &buf
, 1, cu
->language
,
10976 &type_print_raw_options
);
10978 if (cu
->language
== language_cplus
)
10980 /* Assume that an artificial first parameter is
10981 "this", but do not crash if it is not. RealView
10982 marks unnamed (and thus unused) parameters as
10983 artificial; there is no way to differentiate
10985 if (TYPE_NFIELDS (type
) > 0
10986 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10987 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10988 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10990 buf
.puts (" const");
10994 const std::string
&intermediate_name
= buf
.string ();
10996 if (cu
->language
== language_cplus
)
10998 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10999 &objfile
->per_bfd
->storage_obstack
);
11001 /* If we only computed INTERMEDIATE_NAME, or if
11002 INTERMEDIATE_NAME is already canonical, then we need to
11003 copy it to the appropriate obstack. */
11004 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
11005 name
= ((const char *)
11006 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11007 intermediate_name
.c_str (),
11008 intermediate_name
.length ()));
11010 name
= canonical_name
;
11017 /* Return the fully qualified name of DIE, based on its DW_AT_name.
11018 If scope qualifiers are appropriate they will be added. The result
11019 will be allocated on the storage_obstack, or NULL if the DIE does
11020 not have a name. NAME may either be from a previous call to
11021 dwarf2_name or NULL.
11023 The output string will be canonicalized (if C++). */
11025 static const char *
11026 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11028 return dwarf2_compute_name (name
, die
, cu
, 0);
11031 /* Construct a physname for the given DIE in CU. NAME may either be
11032 from a previous call to dwarf2_name or NULL. The result will be
11033 allocated on the objfile_objstack or NULL if the DIE does not have a
11036 The output string will be canonicalized (if C++). */
11038 static const char *
11039 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11041 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11042 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
11045 /* In this case dwarf2_compute_name is just a shortcut not building anything
11047 if (!die_needs_namespace (die
, cu
))
11048 return dwarf2_compute_name (name
, die
, cu
, 1);
11050 mangled
= dw2_linkage_name (die
, cu
);
11052 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
11053 See https://github.com/rust-lang/rust/issues/32925. */
11054 if (cu
->language
== language_rust
&& mangled
!= NULL
11055 && strchr (mangled
, '{') != NULL
)
11058 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
11060 gdb::unique_xmalloc_ptr
<char> demangled
;
11061 if (mangled
!= NULL
)
11064 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
11066 /* Do nothing (do not demangle the symbol name). */
11068 else if (cu
->language
== language_go
)
11070 /* This is a lie, but we already lie to the caller new_symbol.
11071 new_symbol assumes we return the mangled name.
11072 This just undoes that lie until things are cleaned up. */
11076 /* Use DMGL_RET_DROP for C++ template functions to suppress
11077 their return type. It is easier for GDB users to search
11078 for such functions as `name(params)' than `long name(params)'.
11079 In such case the minimal symbol names do not match the full
11080 symbol names but for template functions there is never a need
11081 to look up their definition from their declaration so
11082 the only disadvantage remains the minimal symbol variant
11083 `long name(params)' does not have the proper inferior type. */
11084 demangled
.reset (gdb_demangle (mangled
,
11085 (DMGL_PARAMS
| DMGL_ANSI
11086 | DMGL_RET_DROP
)));
11089 canon
= demangled
.get ();
11097 if (canon
== NULL
|| check_physname
)
11099 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11101 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11103 /* It may not mean a bug in GDB. The compiler could also
11104 compute DW_AT_linkage_name incorrectly. But in such case
11105 GDB would need to be bug-to-bug compatible. */
11107 complaint (_("Computed physname <%s> does not match demangled <%s> "
11108 "(from linkage <%s>) - DIE at %s [in module %s]"),
11109 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11110 objfile_name (objfile
));
11112 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11113 is available here - over computed PHYSNAME. It is safer
11114 against both buggy GDB and buggy compilers. */
11128 retval
= ((const char *)
11129 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11130 retval
, strlen (retval
)));
11135 /* Inspect DIE in CU for a namespace alias. If one exists, record
11136 a new symbol for it.
11138 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11141 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11143 struct attribute
*attr
;
11145 /* If the die does not have a name, this is not a namespace
11147 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11151 struct die_info
*d
= die
;
11152 struct dwarf2_cu
*imported_cu
= cu
;
11154 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11155 keep inspecting DIEs until we hit the underlying import. */
11156 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11157 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11159 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11163 d
= follow_die_ref (d
, attr
, &imported_cu
);
11164 if (d
->tag
!= DW_TAG_imported_declaration
)
11168 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11170 complaint (_("DIE at %s has too many recursively imported "
11171 "declarations"), sect_offset_str (d
->sect_off
));
11178 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11180 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11181 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11183 /* This declaration is a global namespace alias. Add
11184 a symbol for it whose type is the aliased namespace. */
11185 new_symbol (die
, type
, cu
);
11194 /* Return the using directives repository (global or local?) to use in the
11195 current context for CU.
11197 For Ada, imported declarations can materialize renamings, which *may* be
11198 global. However it is impossible (for now?) in DWARF to distinguish
11199 "external" imported declarations and "static" ones. As all imported
11200 declarations seem to be static in all other languages, make them all CU-wide
11201 global only in Ada. */
11203 static struct using_direct
**
11204 using_directives (struct dwarf2_cu
*cu
)
11206 if (cu
->language
== language_ada
11207 && cu
->get_builder ()->outermost_context_p ())
11208 return cu
->get_builder ()->get_global_using_directives ();
11210 return cu
->get_builder ()->get_local_using_directives ();
11213 /* Read the import statement specified by the given die and record it. */
11216 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11218 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11219 struct attribute
*import_attr
;
11220 struct die_info
*imported_die
, *child_die
;
11221 struct dwarf2_cu
*imported_cu
;
11222 const char *imported_name
;
11223 const char *imported_name_prefix
;
11224 const char *canonical_name
;
11225 const char *import_alias
;
11226 const char *imported_declaration
= NULL
;
11227 const char *import_prefix
;
11228 std::vector
<const char *> excludes
;
11230 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11231 if (import_attr
== NULL
)
11233 complaint (_("Tag '%s' has no DW_AT_import"),
11234 dwarf_tag_name (die
->tag
));
11239 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11240 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11241 if (imported_name
== NULL
)
11243 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11245 The import in the following code:
11259 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11260 <52> DW_AT_decl_file : 1
11261 <53> DW_AT_decl_line : 6
11262 <54> DW_AT_import : <0x75>
11263 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11264 <59> DW_AT_name : B
11265 <5b> DW_AT_decl_file : 1
11266 <5c> DW_AT_decl_line : 2
11267 <5d> DW_AT_type : <0x6e>
11269 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11270 <76> DW_AT_byte_size : 4
11271 <77> DW_AT_encoding : 5 (signed)
11273 imports the wrong die ( 0x75 instead of 0x58 ).
11274 This case will be ignored until the gcc bug is fixed. */
11278 /* Figure out the local name after import. */
11279 import_alias
= dwarf2_name (die
, cu
);
11281 /* Figure out where the statement is being imported to. */
11282 import_prefix
= determine_prefix (die
, cu
);
11284 /* Figure out what the scope of the imported die is and prepend it
11285 to the name of the imported die. */
11286 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11288 if (imported_die
->tag
!= DW_TAG_namespace
11289 && imported_die
->tag
!= DW_TAG_module
)
11291 imported_declaration
= imported_name
;
11292 canonical_name
= imported_name_prefix
;
11294 else if (strlen (imported_name_prefix
) > 0)
11295 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11296 imported_name_prefix
,
11297 (cu
->language
== language_d
? "." : "::"),
11298 imported_name
, (char *) NULL
);
11300 canonical_name
= imported_name
;
11302 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11303 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11304 child_die
= sibling_die (child_die
))
11306 /* DWARF-4: A Fortran use statement with a “rename list” may be
11307 represented by an imported module entry with an import attribute
11308 referring to the module and owned entries corresponding to those
11309 entities that are renamed as part of being imported. */
11311 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11313 complaint (_("child DW_TAG_imported_declaration expected "
11314 "- DIE at %s [in module %s]"),
11315 sect_offset_str (child_die
->sect_off
),
11316 objfile_name (objfile
));
11320 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11321 if (import_attr
== NULL
)
11323 complaint (_("Tag '%s' has no DW_AT_import"),
11324 dwarf_tag_name (child_die
->tag
));
11329 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11331 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11332 if (imported_name
== NULL
)
11334 complaint (_("child DW_TAG_imported_declaration has unknown "
11335 "imported name - DIE at %s [in module %s]"),
11336 sect_offset_str (child_die
->sect_off
),
11337 objfile_name (objfile
));
11341 excludes
.push_back (imported_name
);
11343 process_die (child_die
, cu
);
11346 add_using_directive (using_directives (cu
),
11350 imported_declaration
,
11353 &objfile
->objfile_obstack
);
11356 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11357 types, but gives them a size of zero. Starting with version 14,
11358 ICC is compatible with GCC. */
11361 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11363 if (!cu
->checked_producer
)
11364 check_producer (cu
);
11366 return cu
->producer_is_icc_lt_14
;
11369 /* ICC generates a DW_AT_type for C void functions. This was observed on
11370 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
11371 which says that void functions should not have a DW_AT_type. */
11374 producer_is_icc (struct dwarf2_cu
*cu
)
11376 if (!cu
->checked_producer
)
11377 check_producer (cu
);
11379 return cu
->producer_is_icc
;
11382 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11383 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11384 this, it was first present in GCC release 4.3.0. */
11387 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11389 if (!cu
->checked_producer
)
11390 check_producer (cu
);
11392 return cu
->producer_is_gcc_lt_4_3
;
11395 static file_and_directory
11396 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11398 file_and_directory res
;
11400 /* Find the filename. Do not use dwarf2_name here, since the filename
11401 is not a source language identifier. */
11402 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11403 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11405 if (res
.comp_dir
== NULL
11406 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11407 && IS_ABSOLUTE_PATH (res
.name
))
11409 res
.comp_dir_storage
= ldirname (res
.name
);
11410 if (!res
.comp_dir_storage
.empty ())
11411 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11413 if (res
.comp_dir
!= NULL
)
11415 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11416 directory, get rid of it. */
11417 const char *cp
= strchr (res
.comp_dir
, ':');
11419 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11420 res
.comp_dir
= cp
+ 1;
11423 if (res
.name
== NULL
)
11424 res
.name
= "<unknown>";
11429 /* Handle DW_AT_stmt_list for a compilation unit.
11430 DIE is the DW_TAG_compile_unit die for CU.
11431 COMP_DIR is the compilation directory. LOWPC is passed to
11432 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11435 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11436 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11438 struct dwarf2_per_objfile
*dwarf2_per_objfile
11439 = cu
->per_cu
->dwarf2_per_objfile
;
11440 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11441 struct attribute
*attr
;
11442 struct line_header line_header_local
;
11443 hashval_t line_header_local_hash
;
11445 int decode_mapping
;
11447 gdb_assert (! cu
->per_cu
->is_debug_types
);
11449 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11453 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11455 /* The line header hash table is only created if needed (it exists to
11456 prevent redundant reading of the line table for partial_units).
11457 If we're given a partial_unit, we'll need it. If we're given a
11458 compile_unit, then use the line header hash table if it's already
11459 created, but don't create one just yet. */
11461 if (dwarf2_per_objfile
->line_header_hash
== NULL
11462 && die
->tag
== DW_TAG_partial_unit
)
11464 dwarf2_per_objfile
->line_header_hash
11465 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11466 line_header_eq_voidp
,
11467 free_line_header_voidp
,
11468 &objfile
->objfile_obstack
,
11469 hashtab_obstack_allocate
,
11470 dummy_obstack_deallocate
);
11473 line_header_local
.sect_off
= line_offset
;
11474 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11475 line_header_local_hash
= line_header_hash (&line_header_local
);
11476 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11478 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11479 &line_header_local
,
11480 line_header_local_hash
, NO_INSERT
);
11482 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11483 is not present in *SLOT (since if there is something in *SLOT then
11484 it will be for a partial_unit). */
11485 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11487 gdb_assert (*slot
!= NULL
);
11488 cu
->line_header
= (struct line_header
*) *slot
;
11493 /* dwarf_decode_line_header does not yet provide sufficient information.
11494 We always have to call also dwarf_decode_lines for it. */
11495 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11499 cu
->line_header
= lh
.release ();
11500 cu
->line_header_die_owner
= die
;
11502 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11506 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11507 &line_header_local
,
11508 line_header_local_hash
, INSERT
);
11509 gdb_assert (slot
!= NULL
);
11511 if (slot
!= NULL
&& *slot
== NULL
)
11513 /* This newly decoded line number information unit will be owned
11514 by line_header_hash hash table. */
11515 *slot
= cu
->line_header
;
11516 cu
->line_header_die_owner
= NULL
;
11520 /* We cannot free any current entry in (*slot) as that struct line_header
11521 may be already used by multiple CUs. Create only temporary decoded
11522 line_header for this CU - it may happen at most once for each line
11523 number information unit. And if we're not using line_header_hash
11524 then this is what we want as well. */
11525 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11527 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11528 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11533 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11536 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11538 struct dwarf2_per_objfile
*dwarf2_per_objfile
11539 = cu
->per_cu
->dwarf2_per_objfile
;
11540 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11541 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11542 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11543 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11544 struct attribute
*attr
;
11545 struct die_info
*child_die
;
11546 CORE_ADDR baseaddr
;
11548 prepare_one_comp_unit (cu
, die
, cu
->language
);
11549 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11551 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11553 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11554 from finish_block. */
11555 if (lowpc
== ((CORE_ADDR
) -1))
11557 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11559 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11561 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11562 standardised yet. As a workaround for the language detection we fall
11563 back to the DW_AT_producer string. */
11564 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11565 cu
->language
= language_opencl
;
11567 /* Similar hack for Go. */
11568 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11569 set_cu_language (DW_LANG_Go
, cu
);
11571 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
11573 /* Decode line number information if present. We do this before
11574 processing child DIEs, so that the line header table is available
11575 for DW_AT_decl_file. */
11576 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11578 /* Process all dies in compilation unit. */
11579 if (die
->child
!= NULL
)
11581 child_die
= die
->child
;
11582 while (child_die
&& child_die
->tag
)
11584 process_die (child_die
, cu
);
11585 child_die
= sibling_die (child_die
);
11589 /* Decode macro information, if present. Dwarf 2 macro information
11590 refers to information in the line number info statement program
11591 header, so we can only read it if we've read the header
11593 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11595 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11596 if (attr
&& cu
->line_header
)
11598 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11599 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11601 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11605 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11606 if (attr
&& cu
->line_header
)
11608 unsigned int macro_offset
= DW_UNSND (attr
);
11610 dwarf_decode_macros (cu
, macro_offset
, 0);
11616 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11618 struct type_unit_group
*tu_group
;
11620 struct attribute
*attr
;
11622 struct signatured_type
*sig_type
;
11624 gdb_assert (per_cu
->is_debug_types
);
11625 sig_type
= (struct signatured_type
*) per_cu
;
11627 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11629 /* If we're using .gdb_index (includes -readnow) then
11630 per_cu->type_unit_group may not have been set up yet. */
11631 if (sig_type
->type_unit_group
== NULL
)
11632 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11633 tu_group
= sig_type
->type_unit_group
;
11635 /* If we've already processed this stmt_list there's no real need to
11636 do it again, we could fake it and just recreate the part we need
11637 (file name,index -> symtab mapping). If data shows this optimization
11638 is useful we can do it then. */
11639 first_time
= tu_group
->compunit_symtab
== NULL
;
11641 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11646 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11647 lh
= dwarf_decode_line_header (line_offset
, this);
11652 start_symtab ("", NULL
, 0);
11655 gdb_assert (tu_group
->symtabs
== NULL
);
11656 gdb_assert (m_builder
== nullptr);
11657 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11658 m_builder
.reset (new struct buildsym_compunit
11659 (COMPUNIT_OBJFILE (cust
), "",
11660 COMPUNIT_DIRNAME (cust
),
11661 compunit_language (cust
),
11667 line_header
= lh
.release ();
11668 line_header_die_owner
= die
;
11672 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11674 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11675 still initializing it, and our caller (a few levels up)
11676 process_full_type_unit still needs to know if this is the first
11679 tu_group
->num_symtabs
= line_header
->file_names
.size ();
11680 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11681 line_header
->file_names
.size ());
11683 for (i
= 0; i
< line_header
->file_names
.size (); ++i
)
11685 file_entry
&fe
= line_header
->file_names
[i
];
11687 dwarf2_start_subfile (this, fe
.name
,
11688 fe
.include_dir (line_header
));
11689 buildsym_compunit
*b
= get_builder ();
11690 if (b
->get_current_subfile ()->symtab
== NULL
)
11692 /* NOTE: start_subfile will recognize when it's been
11693 passed a file it has already seen. So we can't
11694 assume there's a simple mapping from
11695 cu->line_header->file_names to subfiles, plus
11696 cu->line_header->file_names may contain dups. */
11697 b
->get_current_subfile ()->symtab
11698 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11701 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11702 tu_group
->symtabs
[i
] = fe
.symtab
;
11707 gdb_assert (m_builder
== nullptr);
11708 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11709 m_builder
.reset (new struct buildsym_compunit
11710 (COMPUNIT_OBJFILE (cust
), "",
11711 COMPUNIT_DIRNAME (cust
),
11712 compunit_language (cust
),
11715 for (i
= 0; i
< line_header
->file_names
.size (); ++i
)
11717 file_entry
&fe
= line_header
->file_names
[i
];
11719 fe
.symtab
= tu_group
->symtabs
[i
];
11723 /* The main symtab is allocated last. Type units don't have DW_AT_name
11724 so they don't have a "real" (so to speak) symtab anyway.
11725 There is later code that will assign the main symtab to all symbols
11726 that don't have one. We need to handle the case of a symbol with a
11727 missing symtab (DW_AT_decl_file) anyway. */
11730 /* Process DW_TAG_type_unit.
11731 For TUs we want to skip the first top level sibling if it's not the
11732 actual type being defined by this TU. In this case the first top
11733 level sibling is there to provide context only. */
11736 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11738 struct die_info
*child_die
;
11740 prepare_one_comp_unit (cu
, die
, language_minimal
);
11742 /* Initialize (or reinitialize) the machinery for building symtabs.
11743 We do this before processing child DIEs, so that the line header table
11744 is available for DW_AT_decl_file. */
11745 cu
->setup_type_unit_groups (die
);
11747 if (die
->child
!= NULL
)
11749 child_die
= die
->child
;
11750 while (child_die
&& child_die
->tag
)
11752 process_die (child_die
, cu
);
11753 child_die
= sibling_die (child_die
);
11760 http://gcc.gnu.org/wiki/DebugFission
11761 http://gcc.gnu.org/wiki/DebugFissionDWP
11763 To simplify handling of both DWO files ("object" files with the DWARF info)
11764 and DWP files (a file with the DWOs packaged up into one file), we treat
11765 DWP files as having a collection of virtual DWO files. */
11768 hash_dwo_file (const void *item
)
11770 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11773 hash
= htab_hash_string (dwo_file
->dwo_name
);
11774 if (dwo_file
->comp_dir
!= NULL
)
11775 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11780 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11782 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11783 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11785 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11787 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11788 return lhs
->comp_dir
== rhs
->comp_dir
;
11789 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11792 /* Allocate a hash table for DWO files. */
11795 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11797 return htab_create_alloc_ex (41,
11801 &objfile
->objfile_obstack
,
11802 hashtab_obstack_allocate
,
11803 dummy_obstack_deallocate
);
11806 /* Lookup DWO file DWO_NAME. */
11809 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11810 const char *dwo_name
,
11811 const char *comp_dir
)
11813 struct dwo_file find_entry
;
11816 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11817 dwarf2_per_objfile
->dwo_files
11818 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11820 memset (&find_entry
, 0, sizeof (find_entry
));
11821 find_entry
.dwo_name
= dwo_name
;
11822 find_entry
.comp_dir
= comp_dir
;
11823 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
11829 hash_dwo_unit (const void *item
)
11831 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11833 /* This drops the top 32 bits of the id, but is ok for a hash. */
11834 return dwo_unit
->signature
;
11838 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11840 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11841 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11843 /* The signature is assumed to be unique within the DWO file.
11844 So while object file CU dwo_id's always have the value zero,
11845 that's OK, assuming each object file DWO file has only one CU,
11846 and that's the rule for now. */
11847 return lhs
->signature
== rhs
->signature
;
11850 /* Allocate a hash table for DWO CUs,TUs.
11851 There is one of these tables for each of CUs,TUs for each DWO file. */
11854 allocate_dwo_unit_table (struct objfile
*objfile
)
11856 /* Start out with a pretty small number.
11857 Generally DWO files contain only one CU and maybe some TUs. */
11858 return htab_create_alloc_ex (3,
11862 &objfile
->objfile_obstack
,
11863 hashtab_obstack_allocate
,
11864 dummy_obstack_deallocate
);
11867 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11869 struct create_dwo_cu_data
11871 struct dwo_file
*dwo_file
;
11872 struct dwo_unit dwo_unit
;
11875 /* die_reader_func for create_dwo_cu. */
11878 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11879 const gdb_byte
*info_ptr
,
11880 struct die_info
*comp_unit_die
,
11884 struct dwarf2_cu
*cu
= reader
->cu
;
11885 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11886 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11887 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11888 struct dwo_file
*dwo_file
= data
->dwo_file
;
11889 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11890 struct attribute
*attr
;
11892 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11895 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11896 " its dwo_id [in module %s]"),
11897 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11901 dwo_unit
->dwo_file
= dwo_file
;
11902 dwo_unit
->signature
= DW_UNSND (attr
);
11903 dwo_unit
->section
= section
;
11904 dwo_unit
->sect_off
= sect_off
;
11905 dwo_unit
->length
= cu
->per_cu
->length
;
11907 if (dwarf_read_debug
)
11908 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11909 sect_offset_str (sect_off
),
11910 hex_string (dwo_unit
->signature
));
11913 /* Create the dwo_units for the CUs in a DWO_FILE.
11914 Note: This function processes DWO files only, not DWP files. */
11917 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11918 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11921 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11922 const gdb_byte
*info_ptr
, *end_ptr
;
11924 dwarf2_read_section (objfile
, §ion
);
11925 info_ptr
= section
.buffer
;
11927 if (info_ptr
== NULL
)
11930 if (dwarf_read_debug
)
11932 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11933 get_section_name (§ion
),
11934 get_section_file_name (§ion
));
11937 end_ptr
= info_ptr
+ section
.size
;
11938 while (info_ptr
< end_ptr
)
11940 struct dwarf2_per_cu_data per_cu
;
11941 struct create_dwo_cu_data create_dwo_cu_data
;
11942 struct dwo_unit
*dwo_unit
;
11944 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11946 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11947 sizeof (create_dwo_cu_data
.dwo_unit
));
11948 memset (&per_cu
, 0, sizeof (per_cu
));
11949 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11950 per_cu
.is_debug_types
= 0;
11951 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11952 per_cu
.section
= §ion
;
11953 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11955 init_cutu_and_read_dies_no_follow (
11956 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11957 info_ptr
+= per_cu
.length
;
11959 // If the unit could not be parsed, skip it.
11960 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11963 if (cus_htab
== NULL
)
11964 cus_htab
= allocate_dwo_unit_table (objfile
);
11966 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11967 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
11968 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11969 gdb_assert (slot
!= NULL
);
11972 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11973 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11975 complaint (_("debug cu entry at offset %s is duplicate to"
11976 " the entry at offset %s, signature %s"),
11977 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11978 hex_string (dwo_unit
->signature
));
11980 *slot
= (void *)dwo_unit
;
11984 /* DWP file .debug_{cu,tu}_index section format:
11985 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11989 Both index sections have the same format, and serve to map a 64-bit
11990 signature to a set of section numbers. Each section begins with a header,
11991 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11992 indexes, and a pool of 32-bit section numbers. The index sections will be
11993 aligned at 8-byte boundaries in the file.
11995 The index section header consists of:
11997 V, 32 bit version number
11999 N, 32 bit number of compilation units or type units in the index
12000 M, 32 bit number of slots in the hash table
12002 Numbers are recorded using the byte order of the application binary.
12004 The hash table begins at offset 16 in the section, and consists of an array
12005 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
12006 order of the application binary). Unused slots in the hash table are 0.
12007 (We rely on the extreme unlikeliness of a signature being exactly 0.)
12009 The parallel table begins immediately after the hash table
12010 (at offset 16 + 8 * M from the beginning of the section), and consists of an
12011 array of 32-bit indexes (using the byte order of the application binary),
12012 corresponding 1-1 with slots in the hash table. Each entry in the parallel
12013 table contains a 32-bit index into the pool of section numbers. For unused
12014 hash table slots, the corresponding entry in the parallel table will be 0.
12016 The pool of section numbers begins immediately following the hash table
12017 (at offset 16 + 12 * M from the beginning of the section). The pool of
12018 section numbers consists of an array of 32-bit words (using the byte order
12019 of the application binary). Each item in the array is indexed starting
12020 from 0. The hash table entry provides the index of the first section
12021 number in the set. Additional section numbers in the set follow, and the
12022 set is terminated by a 0 entry (section number 0 is not used in ELF).
12024 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
12025 section must be the first entry in the set, and the .debug_abbrev.dwo must
12026 be the second entry. Other members of the set may follow in any order.
12032 DWP Version 2 combines all the .debug_info, etc. sections into one,
12033 and the entries in the index tables are now offsets into these sections.
12034 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
12037 Index Section Contents:
12039 Hash Table of Signatures dwp_hash_table.hash_table
12040 Parallel Table of Indices dwp_hash_table.unit_table
12041 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
12042 Table of Section Sizes dwp_hash_table.v2.sizes
12044 The index section header consists of:
12046 V, 32 bit version number
12047 L, 32 bit number of columns in the table of section offsets
12048 N, 32 bit number of compilation units or type units in the index
12049 M, 32 bit number of slots in the hash table
12051 Numbers are recorded using the byte order of the application binary.
12053 The hash table has the same format as version 1.
12054 The parallel table of indices has the same format as version 1,
12055 except that the entries are origin-1 indices into the table of sections
12056 offsets and the table of section sizes.
12058 The table of offsets begins immediately following the parallel table
12059 (at offset 16 + 12 * M from the beginning of the section). The table is
12060 a two-dimensional array of 32-bit words (using the byte order of the
12061 application binary), with L columns and N+1 rows, in row-major order.
12062 Each row in the array is indexed starting from 0. The first row provides
12063 a key to the remaining rows: each column in this row provides an identifier
12064 for a debug section, and the offsets in the same column of subsequent rows
12065 refer to that section. The section identifiers are:
12067 DW_SECT_INFO 1 .debug_info.dwo
12068 DW_SECT_TYPES 2 .debug_types.dwo
12069 DW_SECT_ABBREV 3 .debug_abbrev.dwo
12070 DW_SECT_LINE 4 .debug_line.dwo
12071 DW_SECT_LOC 5 .debug_loc.dwo
12072 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
12073 DW_SECT_MACINFO 7 .debug_macinfo.dwo
12074 DW_SECT_MACRO 8 .debug_macro.dwo
12076 The offsets provided by the CU and TU index sections are the base offsets
12077 for the contributions made by each CU or TU to the corresponding section
12078 in the package file. Each CU and TU header contains an abbrev_offset
12079 field, used to find the abbreviations table for that CU or TU within the
12080 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
12081 be interpreted as relative to the base offset given in the index section.
12082 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
12083 should be interpreted as relative to the base offset for .debug_line.dwo,
12084 and offsets into other debug sections obtained from DWARF attributes should
12085 also be interpreted as relative to the corresponding base offset.
12087 The table of sizes begins immediately following the table of offsets.
12088 Like the table of offsets, it is a two-dimensional array of 32-bit words,
12089 with L columns and N rows, in row-major order. Each row in the array is
12090 indexed starting from 1 (row 0 is shared by the two tables).
12094 Hash table lookup is handled the same in version 1 and 2:
12096 We assume that N and M will not exceed 2^32 - 1.
12097 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12099 Given a 64-bit compilation unit signature or a type signature S, an entry
12100 in the hash table is located as follows:
12102 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12103 the low-order k bits all set to 1.
12105 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12107 3) If the hash table entry at index H matches the signature, use that
12108 entry. If the hash table entry at index H is unused (all zeroes),
12109 terminate the search: the signature is not present in the table.
12111 4) Let H = (H + H') modulo M. Repeat at Step 3.
12113 Because M > N and H' and M are relatively prime, the search is guaranteed
12114 to stop at an unused slot or find the match. */
12116 /* Create a hash table to map DWO IDs to their CU/TU entry in
12117 .debug_{info,types}.dwo in DWP_FILE.
12118 Returns NULL if there isn't one.
12119 Note: This function processes DWP files only, not DWO files. */
12121 static struct dwp_hash_table
*
12122 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12123 struct dwp_file
*dwp_file
, int is_debug_types
)
12125 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12126 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12127 const gdb_byte
*index_ptr
, *index_end
;
12128 struct dwarf2_section_info
*index
;
12129 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12130 struct dwp_hash_table
*htab
;
12132 if (is_debug_types
)
12133 index
= &dwp_file
->sections
.tu_index
;
12135 index
= &dwp_file
->sections
.cu_index
;
12137 if (dwarf2_section_empty_p (index
))
12139 dwarf2_read_section (objfile
, index
);
12141 index_ptr
= index
->buffer
;
12142 index_end
= index_ptr
+ index
->size
;
12144 version
= read_4_bytes (dbfd
, index_ptr
);
12147 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12151 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12153 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12156 if (version
!= 1 && version
!= 2)
12158 error (_("Dwarf Error: unsupported DWP file version (%s)"
12159 " [in module %s]"),
12160 pulongest (version
), dwp_file
->name
);
12162 if (nr_slots
!= (nr_slots
& -nr_slots
))
12164 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12165 " is not power of 2 [in module %s]"),
12166 pulongest (nr_slots
), dwp_file
->name
);
12169 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12170 htab
->version
= version
;
12171 htab
->nr_columns
= nr_columns
;
12172 htab
->nr_units
= nr_units
;
12173 htab
->nr_slots
= nr_slots
;
12174 htab
->hash_table
= index_ptr
;
12175 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12177 /* Exit early if the table is empty. */
12178 if (nr_slots
== 0 || nr_units
== 0
12179 || (version
== 2 && nr_columns
== 0))
12181 /* All must be zero. */
12182 if (nr_slots
!= 0 || nr_units
!= 0
12183 || (version
== 2 && nr_columns
!= 0))
12185 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
12186 " all zero [in modules %s]"),
12194 htab
->section_pool
.v1
.indices
=
12195 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12196 /* It's harder to decide whether the section is too small in v1.
12197 V1 is deprecated anyway so we punt. */
12201 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12202 int *ids
= htab
->section_pool
.v2
.section_ids
;
12203 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
12204 /* Reverse map for error checking. */
12205 int ids_seen
[DW_SECT_MAX
+ 1];
12208 if (nr_columns
< 2)
12210 error (_("Dwarf Error: bad DWP hash table, too few columns"
12211 " in section table [in module %s]"),
12214 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12216 error (_("Dwarf Error: bad DWP hash table, too many columns"
12217 " in section table [in module %s]"),
12220 memset (ids
, 255, sizeof_ids
);
12221 memset (ids_seen
, 255, sizeof (ids_seen
));
12222 for (i
= 0; i
< nr_columns
; ++i
)
12224 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12226 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12228 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12229 " in section table [in module %s]"),
12230 id
, dwp_file
->name
);
12232 if (ids_seen
[id
] != -1)
12234 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12235 " id %d in section table [in module %s]"),
12236 id
, dwp_file
->name
);
12241 /* Must have exactly one info or types section. */
12242 if (((ids_seen
[DW_SECT_INFO
] != -1)
12243 + (ids_seen
[DW_SECT_TYPES
] != -1))
12246 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12247 " DWO info/types section [in module %s]"),
12250 /* Must have an abbrev section. */
12251 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12253 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12254 " section [in module %s]"),
12257 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12258 htab
->section_pool
.v2
.sizes
=
12259 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12260 * nr_units
* nr_columns
);
12261 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12262 * nr_units
* nr_columns
))
12265 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12266 " [in module %s]"),
12274 /* Update SECTIONS with the data from SECTP.
12276 This function is like the other "locate" section routines that are
12277 passed to bfd_map_over_sections, but in this context the sections to
12278 read comes from the DWP V1 hash table, not the full ELF section table.
12280 The result is non-zero for success, or zero if an error was found. */
12283 locate_v1_virtual_dwo_sections (asection
*sectp
,
12284 struct virtual_v1_dwo_sections
*sections
)
12286 const struct dwop_section_names
*names
= &dwop_section_names
;
12288 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12290 /* There can be only one. */
12291 if (sections
->abbrev
.s
.section
!= NULL
)
12293 sections
->abbrev
.s
.section
= sectp
;
12294 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12296 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12297 || section_is_p (sectp
->name
, &names
->types_dwo
))
12299 /* There can be only one. */
12300 if (sections
->info_or_types
.s
.section
!= NULL
)
12302 sections
->info_or_types
.s
.section
= sectp
;
12303 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12305 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12307 /* There can be only one. */
12308 if (sections
->line
.s
.section
!= NULL
)
12310 sections
->line
.s
.section
= sectp
;
12311 sections
->line
.size
= bfd_get_section_size (sectp
);
12313 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12315 /* There can be only one. */
12316 if (sections
->loc
.s
.section
!= NULL
)
12318 sections
->loc
.s
.section
= sectp
;
12319 sections
->loc
.size
= bfd_get_section_size (sectp
);
12321 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12323 /* There can be only one. */
12324 if (sections
->macinfo
.s
.section
!= NULL
)
12326 sections
->macinfo
.s
.section
= sectp
;
12327 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12329 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12331 /* There can be only one. */
12332 if (sections
->macro
.s
.section
!= NULL
)
12334 sections
->macro
.s
.section
= sectp
;
12335 sections
->macro
.size
= bfd_get_section_size (sectp
);
12337 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12339 /* There can be only one. */
12340 if (sections
->str_offsets
.s
.section
!= NULL
)
12342 sections
->str_offsets
.s
.section
= sectp
;
12343 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12347 /* No other kind of section is valid. */
12354 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12355 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12356 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12357 This is for DWP version 1 files. */
12359 static struct dwo_unit
*
12360 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12361 struct dwp_file
*dwp_file
,
12362 uint32_t unit_index
,
12363 const char *comp_dir
,
12364 ULONGEST signature
, int is_debug_types
)
12366 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12367 const struct dwp_hash_table
*dwp_htab
=
12368 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12369 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12370 const char *kind
= is_debug_types
? "TU" : "CU";
12371 struct dwo_file
*dwo_file
;
12372 struct dwo_unit
*dwo_unit
;
12373 struct virtual_v1_dwo_sections sections
;
12374 void **dwo_file_slot
;
12377 gdb_assert (dwp_file
->version
== 1);
12379 if (dwarf_read_debug
)
12381 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12383 pulongest (unit_index
), hex_string (signature
),
12387 /* Fetch the sections of this DWO unit.
12388 Put a limit on the number of sections we look for so that bad data
12389 doesn't cause us to loop forever. */
12391 #define MAX_NR_V1_DWO_SECTIONS \
12392 (1 /* .debug_info or .debug_types */ \
12393 + 1 /* .debug_abbrev */ \
12394 + 1 /* .debug_line */ \
12395 + 1 /* .debug_loc */ \
12396 + 1 /* .debug_str_offsets */ \
12397 + 1 /* .debug_macro or .debug_macinfo */ \
12398 + 1 /* trailing zero */)
12400 memset (§ions
, 0, sizeof (sections
));
12402 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12405 uint32_t section_nr
=
12406 read_4_bytes (dbfd
,
12407 dwp_htab
->section_pool
.v1
.indices
12408 + (unit_index
+ i
) * sizeof (uint32_t));
12410 if (section_nr
== 0)
12412 if (section_nr
>= dwp_file
->num_sections
)
12414 error (_("Dwarf Error: bad DWP hash table, section number too large"
12415 " [in module %s]"),
12419 sectp
= dwp_file
->elf_sections
[section_nr
];
12420 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12422 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12423 " [in module %s]"),
12429 || dwarf2_section_empty_p (§ions
.info_or_types
)
12430 || dwarf2_section_empty_p (§ions
.abbrev
))
12432 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12433 " [in module %s]"),
12436 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12438 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12439 " [in module %s]"),
12443 /* It's easier for the rest of the code if we fake a struct dwo_file and
12444 have dwo_unit "live" in that. At least for now.
12446 The DWP file can be made up of a random collection of CUs and TUs.
12447 However, for each CU + set of TUs that came from the same original DWO
12448 file, we can combine them back into a virtual DWO file to save space
12449 (fewer struct dwo_file objects to allocate). Remember that for really
12450 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12452 std::string virtual_dwo_name
=
12453 string_printf ("virtual-dwo/%d-%d-%d-%d",
12454 get_section_id (§ions
.abbrev
),
12455 get_section_id (§ions
.line
),
12456 get_section_id (§ions
.loc
),
12457 get_section_id (§ions
.str_offsets
));
12458 /* Can we use an existing virtual DWO file? */
12459 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12460 virtual_dwo_name
.c_str (),
12462 /* Create one if necessary. */
12463 if (*dwo_file_slot
== NULL
)
12465 if (dwarf_read_debug
)
12467 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12468 virtual_dwo_name
.c_str ());
12470 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12472 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12473 virtual_dwo_name
.c_str (),
12474 virtual_dwo_name
.size ());
12475 dwo_file
->comp_dir
= comp_dir
;
12476 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12477 dwo_file
->sections
.line
= sections
.line
;
12478 dwo_file
->sections
.loc
= sections
.loc
;
12479 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12480 dwo_file
->sections
.macro
= sections
.macro
;
12481 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12482 /* The "str" section is global to the entire DWP file. */
12483 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12484 /* The info or types section is assigned below to dwo_unit,
12485 there's no need to record it in dwo_file.
12486 Also, we can't simply record type sections in dwo_file because
12487 we record a pointer into the vector in dwo_unit. As we collect more
12488 types we'll grow the vector and eventually have to reallocate space
12489 for it, invalidating all copies of pointers into the previous
12491 *dwo_file_slot
= dwo_file
;
12495 if (dwarf_read_debug
)
12497 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12498 virtual_dwo_name
.c_str ());
12500 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12503 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12504 dwo_unit
->dwo_file
= dwo_file
;
12505 dwo_unit
->signature
= signature
;
12506 dwo_unit
->section
=
12507 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12508 *dwo_unit
->section
= sections
.info_or_types
;
12509 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12514 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12515 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12516 piece within that section used by a TU/CU, return a virtual section
12517 of just that piece. */
12519 static struct dwarf2_section_info
12520 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12521 struct dwarf2_section_info
*section
,
12522 bfd_size_type offset
, bfd_size_type size
)
12524 struct dwarf2_section_info result
;
12527 gdb_assert (section
!= NULL
);
12528 gdb_assert (!section
->is_virtual
);
12530 memset (&result
, 0, sizeof (result
));
12531 result
.s
.containing_section
= section
;
12532 result
.is_virtual
= 1;
12537 sectp
= get_section_bfd_section (section
);
12539 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12540 bounds of the real section. This is a pretty-rare event, so just
12541 flag an error (easier) instead of a warning and trying to cope. */
12543 || offset
+ size
> bfd_get_section_size (sectp
))
12545 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12546 " in section %s [in module %s]"),
12547 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12548 objfile_name (dwarf2_per_objfile
->objfile
));
12551 result
.virtual_offset
= offset
;
12552 result
.size
= size
;
12556 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12557 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12558 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12559 This is for DWP version 2 files. */
12561 static struct dwo_unit
*
12562 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12563 struct dwp_file
*dwp_file
,
12564 uint32_t unit_index
,
12565 const char *comp_dir
,
12566 ULONGEST signature
, int is_debug_types
)
12568 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12569 const struct dwp_hash_table
*dwp_htab
=
12570 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12571 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12572 const char *kind
= is_debug_types
? "TU" : "CU";
12573 struct dwo_file
*dwo_file
;
12574 struct dwo_unit
*dwo_unit
;
12575 struct virtual_v2_dwo_sections sections
;
12576 void **dwo_file_slot
;
12579 gdb_assert (dwp_file
->version
== 2);
12581 if (dwarf_read_debug
)
12583 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12585 pulongest (unit_index
), hex_string (signature
),
12589 /* Fetch the section offsets of this DWO unit. */
12591 memset (§ions
, 0, sizeof (sections
));
12593 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12595 uint32_t offset
= read_4_bytes (dbfd
,
12596 dwp_htab
->section_pool
.v2
.offsets
12597 + (((unit_index
- 1) * dwp_htab
->nr_columns
12599 * sizeof (uint32_t)));
12600 uint32_t size
= read_4_bytes (dbfd
,
12601 dwp_htab
->section_pool
.v2
.sizes
12602 + (((unit_index
- 1) * dwp_htab
->nr_columns
12604 * sizeof (uint32_t)));
12606 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12609 case DW_SECT_TYPES
:
12610 sections
.info_or_types_offset
= offset
;
12611 sections
.info_or_types_size
= size
;
12613 case DW_SECT_ABBREV
:
12614 sections
.abbrev_offset
= offset
;
12615 sections
.abbrev_size
= size
;
12618 sections
.line_offset
= offset
;
12619 sections
.line_size
= size
;
12622 sections
.loc_offset
= offset
;
12623 sections
.loc_size
= size
;
12625 case DW_SECT_STR_OFFSETS
:
12626 sections
.str_offsets_offset
= offset
;
12627 sections
.str_offsets_size
= size
;
12629 case DW_SECT_MACINFO
:
12630 sections
.macinfo_offset
= offset
;
12631 sections
.macinfo_size
= size
;
12633 case DW_SECT_MACRO
:
12634 sections
.macro_offset
= offset
;
12635 sections
.macro_size
= size
;
12640 /* It's easier for the rest of the code if we fake a struct dwo_file and
12641 have dwo_unit "live" in that. At least for now.
12643 The DWP file can be made up of a random collection of CUs and TUs.
12644 However, for each CU + set of TUs that came from the same original DWO
12645 file, we can combine them back into a virtual DWO file to save space
12646 (fewer struct dwo_file objects to allocate). Remember that for really
12647 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12649 std::string virtual_dwo_name
=
12650 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12651 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12652 (long) (sections
.line_size
? sections
.line_offset
: 0),
12653 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12654 (long) (sections
.str_offsets_size
12655 ? sections
.str_offsets_offset
: 0));
12656 /* Can we use an existing virtual DWO file? */
12657 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12658 virtual_dwo_name
.c_str (),
12660 /* Create one if necessary. */
12661 if (*dwo_file_slot
== NULL
)
12663 if (dwarf_read_debug
)
12665 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12666 virtual_dwo_name
.c_str ());
12668 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12670 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12671 virtual_dwo_name
.c_str (),
12672 virtual_dwo_name
.size ());
12673 dwo_file
->comp_dir
= comp_dir
;
12674 dwo_file
->sections
.abbrev
=
12675 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12676 sections
.abbrev_offset
, sections
.abbrev_size
);
12677 dwo_file
->sections
.line
=
12678 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12679 sections
.line_offset
, sections
.line_size
);
12680 dwo_file
->sections
.loc
=
12681 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12682 sections
.loc_offset
, sections
.loc_size
);
12683 dwo_file
->sections
.macinfo
=
12684 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12685 sections
.macinfo_offset
, sections
.macinfo_size
);
12686 dwo_file
->sections
.macro
=
12687 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12688 sections
.macro_offset
, sections
.macro_size
);
12689 dwo_file
->sections
.str_offsets
=
12690 create_dwp_v2_section (dwarf2_per_objfile
,
12691 &dwp_file
->sections
.str_offsets
,
12692 sections
.str_offsets_offset
,
12693 sections
.str_offsets_size
);
12694 /* The "str" section is global to the entire DWP file. */
12695 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12696 /* The info or types section is assigned below to dwo_unit,
12697 there's no need to record it in dwo_file.
12698 Also, we can't simply record type sections in dwo_file because
12699 we record a pointer into the vector in dwo_unit. As we collect more
12700 types we'll grow the vector and eventually have to reallocate space
12701 for it, invalidating all copies of pointers into the previous
12703 *dwo_file_slot
= dwo_file
;
12707 if (dwarf_read_debug
)
12709 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12710 virtual_dwo_name
.c_str ());
12712 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12715 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12716 dwo_unit
->dwo_file
= dwo_file
;
12717 dwo_unit
->signature
= signature
;
12718 dwo_unit
->section
=
12719 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12720 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12722 ? &dwp_file
->sections
.types
12723 : &dwp_file
->sections
.info
,
12724 sections
.info_or_types_offset
,
12725 sections
.info_or_types_size
);
12726 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12731 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12732 Returns NULL if the signature isn't found. */
12734 static struct dwo_unit
*
12735 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12736 struct dwp_file
*dwp_file
, const char *comp_dir
,
12737 ULONGEST signature
, int is_debug_types
)
12739 const struct dwp_hash_table
*dwp_htab
=
12740 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12741 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12742 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12743 uint32_t hash
= signature
& mask
;
12744 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12747 struct dwo_unit find_dwo_cu
;
12749 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12750 find_dwo_cu
.signature
= signature
;
12751 slot
= htab_find_slot (is_debug_types
12752 ? dwp_file
->loaded_tus
12753 : dwp_file
->loaded_cus
,
12754 &find_dwo_cu
, INSERT
);
12757 return (struct dwo_unit
*) *slot
;
12759 /* Use a for loop so that we don't loop forever on bad debug info. */
12760 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12762 ULONGEST signature_in_table
;
12764 signature_in_table
=
12765 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12766 if (signature_in_table
== signature
)
12768 uint32_t unit_index
=
12769 read_4_bytes (dbfd
,
12770 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12772 if (dwp_file
->version
== 1)
12774 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12775 dwp_file
, unit_index
,
12776 comp_dir
, signature
,
12781 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12782 dwp_file
, unit_index
,
12783 comp_dir
, signature
,
12786 return (struct dwo_unit
*) *slot
;
12788 if (signature_in_table
== 0)
12790 hash
= (hash
+ hash2
) & mask
;
12793 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12794 " [in module %s]"),
12798 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12799 Open the file specified by FILE_NAME and hand it off to BFD for
12800 preliminary analysis. Return a newly initialized bfd *, which
12801 includes a canonicalized copy of FILE_NAME.
12802 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12803 SEARCH_CWD is true if the current directory is to be searched.
12804 It will be searched before debug-file-directory.
12805 If successful, the file is added to the bfd include table of the
12806 objfile's bfd (see gdb_bfd_record_inclusion).
12807 If unable to find/open the file, return NULL.
12808 NOTE: This function is derived from symfile_bfd_open. */
12810 static gdb_bfd_ref_ptr
12811 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12812 const char *file_name
, int is_dwp
, int search_cwd
)
12815 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12816 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12817 to debug_file_directory. */
12818 const char *search_path
;
12819 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12821 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12824 if (*debug_file_directory
!= '\0')
12826 search_path_holder
.reset (concat (".", dirname_separator_string
,
12827 debug_file_directory
,
12829 search_path
= search_path_holder
.get ();
12835 search_path
= debug_file_directory
;
12837 openp_flags flags
= OPF_RETURN_REALPATH
;
12839 flags
|= OPF_SEARCH_IN_PATH
;
12841 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12842 desc
= openp (search_path
, flags
, file_name
,
12843 O_RDONLY
| O_BINARY
, &absolute_name
);
12847 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12849 if (sym_bfd
== NULL
)
12851 bfd_set_cacheable (sym_bfd
.get (), 1);
12853 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12856 /* Success. Record the bfd as having been included by the objfile's bfd.
12857 This is important because things like demangled_names_hash lives in the
12858 objfile's per_bfd space and may have references to things like symbol
12859 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12860 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12865 /* Try to open DWO file FILE_NAME.
12866 COMP_DIR is the DW_AT_comp_dir attribute.
12867 The result is the bfd handle of the file.
12868 If there is a problem finding or opening the file, return NULL.
12869 Upon success, the canonicalized path of the file is stored in the bfd,
12870 same as symfile_bfd_open. */
12872 static gdb_bfd_ref_ptr
12873 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12874 const char *file_name
, const char *comp_dir
)
12876 if (IS_ABSOLUTE_PATH (file_name
))
12877 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12878 0 /*is_dwp*/, 0 /*search_cwd*/);
12880 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12882 if (comp_dir
!= NULL
)
12884 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12885 file_name
, (char *) NULL
);
12887 /* NOTE: If comp_dir is a relative path, this will also try the
12888 search path, which seems useful. */
12889 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12892 1 /*search_cwd*/));
12893 xfree (path_to_try
);
12898 /* That didn't work, try debug-file-directory, which, despite its name,
12899 is a list of paths. */
12901 if (*debug_file_directory
== '\0')
12904 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12905 0 /*is_dwp*/, 1 /*search_cwd*/);
12908 /* This function is mapped across the sections and remembers the offset and
12909 size of each of the DWO debugging sections we are interested in. */
12912 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12914 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12915 const struct dwop_section_names
*names
= &dwop_section_names
;
12917 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12919 dwo_sections
->abbrev
.s
.section
= sectp
;
12920 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12922 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12924 dwo_sections
->info
.s
.section
= sectp
;
12925 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12927 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12929 dwo_sections
->line
.s
.section
= sectp
;
12930 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12932 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12934 dwo_sections
->loc
.s
.section
= sectp
;
12935 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
12937 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12939 dwo_sections
->macinfo
.s
.section
= sectp
;
12940 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12942 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12944 dwo_sections
->macro
.s
.section
= sectp
;
12945 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
12947 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12949 dwo_sections
->str
.s
.section
= sectp
;
12950 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
12952 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12954 dwo_sections
->str_offsets
.s
.section
= sectp
;
12955 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12957 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12959 struct dwarf2_section_info type_section
;
12961 memset (&type_section
, 0, sizeof (type_section
));
12962 type_section
.s
.section
= sectp
;
12963 type_section
.size
= bfd_get_section_size (sectp
);
12964 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
12969 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12970 by PER_CU. This is for the non-DWP case.
12971 The result is NULL if DWO_NAME can't be found. */
12973 static struct dwo_file
*
12974 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12975 const char *dwo_name
, const char *comp_dir
)
12977 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12978 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12980 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
));
12983 if (dwarf_read_debug
)
12984 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12988 /* We use a unique pointer here, despite the obstack allocation,
12989 because a dwo_file needs some cleanup if it is abandoned. */
12990 dwo_file_up
dwo_file (OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
12992 dwo_file
->dwo_name
= dwo_name
;
12993 dwo_file
->comp_dir
= comp_dir
;
12994 dwo_file
->dbfd
= dbfd
.release ();
12996 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
12997 &dwo_file
->sections
);
12999 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
13002 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
13003 dwo_file
->sections
.types
, dwo_file
->tus
);
13005 if (dwarf_read_debug
)
13006 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
13008 return dwo_file
.release ();
13011 /* This function is mapped across the sections and remembers the offset and
13012 size of each of the DWP debugging sections common to version 1 and 2 that
13013 we are interested in. */
13016 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
13017 void *dwp_file_ptr
)
13019 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13020 const struct dwop_section_names
*names
= &dwop_section_names
;
13021 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13023 /* Record the ELF section number for later lookup: this is what the
13024 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13025 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13026 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13028 /* Look for specific sections that we need. */
13029 if (section_is_p (sectp
->name
, &names
->str_dwo
))
13031 dwp_file
->sections
.str
.s
.section
= sectp
;
13032 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
13034 else if (section_is_p (sectp
->name
, &names
->cu_index
))
13036 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
13037 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
13039 else if (section_is_p (sectp
->name
, &names
->tu_index
))
13041 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
13042 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
13046 /* This function is mapped across the sections and remembers the offset and
13047 size of each of the DWP version 2 debugging sections that we are interested
13048 in. This is split into a separate function because we don't know if we
13049 have version 1 or 2 until we parse the cu_index/tu_index sections. */
13052 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
13054 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13055 const struct dwop_section_names
*names
= &dwop_section_names
;
13056 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13058 /* Record the ELF section number for later lookup: this is what the
13059 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13060 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13061 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13063 /* Look for specific sections that we need. */
13064 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
13066 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
13067 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
13069 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
13071 dwp_file
->sections
.info
.s
.section
= sectp
;
13072 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
13074 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
13076 dwp_file
->sections
.line
.s
.section
= sectp
;
13077 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
13079 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
13081 dwp_file
->sections
.loc
.s
.section
= sectp
;
13082 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
13084 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
13086 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
13087 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
13089 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13091 dwp_file
->sections
.macro
.s
.section
= sectp
;
13092 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
13094 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13096 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13097 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
13099 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13101 dwp_file
->sections
.types
.s
.section
= sectp
;
13102 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
13106 /* Hash function for dwp_file loaded CUs/TUs. */
13109 hash_dwp_loaded_cutus (const void *item
)
13111 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13113 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13114 return dwo_unit
->signature
;
13117 /* Equality function for dwp_file loaded CUs/TUs. */
13120 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13122 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13123 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13125 return dua
->signature
== dub
->signature
;
13128 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13131 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13133 return htab_create_alloc_ex (3,
13134 hash_dwp_loaded_cutus
,
13135 eq_dwp_loaded_cutus
,
13137 &objfile
->objfile_obstack
,
13138 hashtab_obstack_allocate
,
13139 dummy_obstack_deallocate
);
13142 /* Try to open DWP file FILE_NAME.
13143 The result is the bfd handle of the file.
13144 If there is a problem finding or opening the file, return NULL.
13145 Upon success, the canonicalized path of the file is stored in the bfd,
13146 same as symfile_bfd_open. */
13148 static gdb_bfd_ref_ptr
13149 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13150 const char *file_name
)
13152 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13154 1 /*search_cwd*/));
13158 /* Work around upstream bug 15652.
13159 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13160 [Whether that's a "bug" is debatable, but it is getting in our way.]
13161 We have no real idea where the dwp file is, because gdb's realpath-ing
13162 of the executable's path may have discarded the needed info.
13163 [IWBN if the dwp file name was recorded in the executable, akin to
13164 .gnu_debuglink, but that doesn't exist yet.]
13165 Strip the directory from FILE_NAME and search again. */
13166 if (*debug_file_directory
!= '\0')
13168 /* Don't implicitly search the current directory here.
13169 If the user wants to search "." to handle this case,
13170 it must be added to debug-file-directory. */
13171 return try_open_dwop_file (dwarf2_per_objfile
,
13172 lbasename (file_name
), 1 /*is_dwp*/,
13179 /* Initialize the use of the DWP file for the current objfile.
13180 By convention the name of the DWP file is ${objfile}.dwp.
13181 The result is NULL if it can't be found. */
13183 static std::unique_ptr
<struct dwp_file
>
13184 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13186 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13188 /* Try to find first .dwp for the binary file before any symbolic links
13191 /* If the objfile is a debug file, find the name of the real binary
13192 file and get the name of dwp file from there. */
13193 std::string dwp_name
;
13194 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13196 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13197 const char *backlink_basename
= lbasename (backlink
->original_name
);
13199 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13202 dwp_name
= objfile
->original_name
;
13204 dwp_name
+= ".dwp";
13206 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13208 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13210 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13211 dwp_name
= objfile_name (objfile
);
13212 dwp_name
+= ".dwp";
13213 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13218 if (dwarf_read_debug
)
13219 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13220 return std::unique_ptr
<dwp_file
> ();
13223 const char *name
= bfd_get_filename (dbfd
.get ());
13224 std::unique_ptr
<struct dwp_file
> dwp_file
13225 (new struct dwp_file (name
, std::move (dbfd
)));
13227 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
13228 dwp_file
->elf_sections
=
13229 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13230 dwp_file
->num_sections
, asection
*);
13232 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13233 dwarf2_locate_common_dwp_sections
,
13236 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13239 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13242 /* The DWP file version is stored in the hash table. Oh well. */
13243 if (dwp_file
->cus
&& dwp_file
->tus
13244 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13246 /* Technically speaking, we should try to limp along, but this is
13247 pretty bizarre. We use pulongest here because that's the established
13248 portability solution (e.g, we cannot use %u for uint32_t). */
13249 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13250 " TU version %s [in DWP file %s]"),
13251 pulongest (dwp_file
->cus
->version
),
13252 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13256 dwp_file
->version
= dwp_file
->cus
->version
;
13257 else if (dwp_file
->tus
)
13258 dwp_file
->version
= dwp_file
->tus
->version
;
13260 dwp_file
->version
= 2;
13262 if (dwp_file
->version
== 2)
13263 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13264 dwarf2_locate_v2_dwp_sections
,
13267 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13268 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13270 if (dwarf_read_debug
)
13272 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13273 fprintf_unfiltered (gdb_stdlog
,
13274 " %s CUs, %s TUs\n",
13275 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13276 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13282 /* Wrapper around open_and_init_dwp_file, only open it once. */
13284 static struct dwp_file
*
13285 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13287 if (! dwarf2_per_objfile
->dwp_checked
)
13289 dwarf2_per_objfile
->dwp_file
13290 = open_and_init_dwp_file (dwarf2_per_objfile
);
13291 dwarf2_per_objfile
->dwp_checked
= 1;
13293 return dwarf2_per_objfile
->dwp_file
.get ();
13296 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13297 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13298 or in the DWP file for the objfile, referenced by THIS_UNIT.
13299 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13300 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13302 This is called, for example, when wanting to read a variable with a
13303 complex location. Therefore we don't want to do file i/o for every call.
13304 Therefore we don't want to look for a DWO file on every call.
13305 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13306 then we check if we've already seen DWO_NAME, and only THEN do we check
13309 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13310 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13312 static struct dwo_unit
*
13313 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13314 const char *dwo_name
, const char *comp_dir
,
13315 ULONGEST signature
, int is_debug_types
)
13317 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13318 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13319 const char *kind
= is_debug_types
? "TU" : "CU";
13320 void **dwo_file_slot
;
13321 struct dwo_file
*dwo_file
;
13322 struct dwp_file
*dwp_file
;
13324 /* First see if there's a DWP file.
13325 If we have a DWP file but didn't find the DWO inside it, don't
13326 look for the original DWO file. It makes gdb behave differently
13327 depending on whether one is debugging in the build tree. */
13329 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13330 if (dwp_file
!= NULL
)
13332 const struct dwp_hash_table
*dwp_htab
=
13333 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13335 if (dwp_htab
!= NULL
)
13337 struct dwo_unit
*dwo_cutu
=
13338 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13339 signature
, is_debug_types
);
13341 if (dwo_cutu
!= NULL
)
13343 if (dwarf_read_debug
)
13345 fprintf_unfiltered (gdb_stdlog
,
13346 "Virtual DWO %s %s found: @%s\n",
13347 kind
, hex_string (signature
),
13348 host_address_to_string (dwo_cutu
));
13356 /* No DWP file, look for the DWO file. */
13358 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13359 dwo_name
, comp_dir
);
13360 if (*dwo_file_slot
== NULL
)
13362 /* Read in the file and build a table of the CUs/TUs it contains. */
13363 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13365 /* NOTE: This will be NULL if unable to open the file. */
13366 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13368 if (dwo_file
!= NULL
)
13370 struct dwo_unit
*dwo_cutu
= NULL
;
13372 if (is_debug_types
&& dwo_file
->tus
)
13374 struct dwo_unit find_dwo_cutu
;
13376 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13377 find_dwo_cutu
.signature
= signature
;
13379 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13381 else if (!is_debug_types
&& dwo_file
->cus
)
13383 struct dwo_unit find_dwo_cutu
;
13385 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13386 find_dwo_cutu
.signature
= signature
;
13387 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13391 if (dwo_cutu
!= NULL
)
13393 if (dwarf_read_debug
)
13395 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13396 kind
, dwo_name
, hex_string (signature
),
13397 host_address_to_string (dwo_cutu
));
13404 /* We didn't find it. This could mean a dwo_id mismatch, or
13405 someone deleted the DWO/DWP file, or the search path isn't set up
13406 correctly to find the file. */
13408 if (dwarf_read_debug
)
13410 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13411 kind
, dwo_name
, hex_string (signature
));
13414 /* This is a warning and not a complaint because it can be caused by
13415 pilot error (e.g., user accidentally deleting the DWO). */
13417 /* Print the name of the DWP file if we looked there, helps the user
13418 better diagnose the problem. */
13419 std::string dwp_text
;
13421 if (dwp_file
!= NULL
)
13422 dwp_text
= string_printf (" [in DWP file %s]",
13423 lbasename (dwp_file
->name
));
13425 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13426 " [in module %s]"),
13427 kind
, dwo_name
, hex_string (signature
),
13429 this_unit
->is_debug_types
? "TU" : "CU",
13430 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13435 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13436 See lookup_dwo_cutu_unit for details. */
13438 static struct dwo_unit
*
13439 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13440 const char *dwo_name
, const char *comp_dir
,
13441 ULONGEST signature
)
13443 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13446 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13447 See lookup_dwo_cutu_unit for details. */
13449 static struct dwo_unit
*
13450 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13451 const char *dwo_name
, const char *comp_dir
)
13453 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13456 /* Traversal function for queue_and_load_all_dwo_tus. */
13459 queue_and_load_dwo_tu (void **slot
, void *info
)
13461 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13462 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13463 ULONGEST signature
= dwo_unit
->signature
;
13464 struct signatured_type
*sig_type
=
13465 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13467 if (sig_type
!= NULL
)
13469 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13471 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13472 a real dependency of PER_CU on SIG_TYPE. That is detected later
13473 while processing PER_CU. */
13474 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13475 load_full_type_unit (sig_cu
);
13476 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13482 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13483 The DWO may have the only definition of the type, though it may not be
13484 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13485 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13488 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13490 struct dwo_unit
*dwo_unit
;
13491 struct dwo_file
*dwo_file
;
13493 gdb_assert (!per_cu
->is_debug_types
);
13494 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13495 gdb_assert (per_cu
->cu
!= NULL
);
13497 dwo_unit
= per_cu
->cu
->dwo_unit
;
13498 gdb_assert (dwo_unit
!= NULL
);
13500 dwo_file
= dwo_unit
->dwo_file
;
13501 if (dwo_file
->tus
!= NULL
)
13502 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13505 /* Free all resources associated with DWO_FILE.
13506 Close the DWO file and munmap the sections. */
13509 free_dwo_file (struct dwo_file
*dwo_file
)
13511 /* Note: dbfd is NULL for virtual DWO files. */
13512 gdb_bfd_unref (dwo_file
->dbfd
);
13514 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
13517 /* Traversal function for free_dwo_files. */
13520 free_dwo_file_from_slot (void **slot
, void *info
)
13522 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
13524 free_dwo_file (dwo_file
);
13529 /* Free all resources associated with DWO_FILES. */
13532 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
13534 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
13537 /* Read in various DIEs. */
13539 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13540 Inherit only the children of the DW_AT_abstract_origin DIE not being
13541 already referenced by DW_AT_abstract_origin from the children of the
13545 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13547 struct die_info
*child_die
;
13548 sect_offset
*offsetp
;
13549 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13550 struct die_info
*origin_die
;
13551 /* Iterator of the ORIGIN_DIE children. */
13552 struct die_info
*origin_child_die
;
13553 struct attribute
*attr
;
13554 struct dwarf2_cu
*origin_cu
;
13555 struct pending
**origin_previous_list_in_scope
;
13557 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13561 /* Note that following die references may follow to a die in a
13565 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13567 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13569 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13570 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13572 if (die
->tag
!= origin_die
->tag
13573 && !(die
->tag
== DW_TAG_inlined_subroutine
13574 && origin_die
->tag
== DW_TAG_subprogram
))
13575 complaint (_("DIE %s and its abstract origin %s have different tags"),
13576 sect_offset_str (die
->sect_off
),
13577 sect_offset_str (origin_die
->sect_off
));
13579 std::vector
<sect_offset
> offsets
;
13581 for (child_die
= die
->child
;
13582 child_die
&& child_die
->tag
;
13583 child_die
= sibling_die (child_die
))
13585 struct die_info
*child_origin_die
;
13586 struct dwarf2_cu
*child_origin_cu
;
13588 /* We are trying to process concrete instance entries:
13589 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13590 it's not relevant to our analysis here. i.e. detecting DIEs that are
13591 present in the abstract instance but not referenced in the concrete
13593 if (child_die
->tag
== DW_TAG_call_site
13594 || child_die
->tag
== DW_TAG_GNU_call_site
)
13597 /* For each CHILD_DIE, find the corresponding child of
13598 ORIGIN_DIE. If there is more than one layer of
13599 DW_AT_abstract_origin, follow them all; there shouldn't be,
13600 but GCC versions at least through 4.4 generate this (GCC PR
13602 child_origin_die
= child_die
;
13603 child_origin_cu
= cu
;
13606 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13610 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13614 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13615 counterpart may exist. */
13616 if (child_origin_die
!= child_die
)
13618 if (child_die
->tag
!= child_origin_die
->tag
13619 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13620 && child_origin_die
->tag
== DW_TAG_subprogram
))
13621 complaint (_("Child DIE %s and its abstract origin %s have "
13623 sect_offset_str (child_die
->sect_off
),
13624 sect_offset_str (child_origin_die
->sect_off
));
13625 if (child_origin_die
->parent
!= origin_die
)
13626 complaint (_("Child DIE %s and its abstract origin %s have "
13627 "different parents"),
13628 sect_offset_str (child_die
->sect_off
),
13629 sect_offset_str (child_origin_die
->sect_off
));
13631 offsets
.push_back (child_origin_die
->sect_off
);
13634 std::sort (offsets
.begin (), offsets
.end ());
13635 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13636 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13637 if (offsetp
[-1] == *offsetp
)
13638 complaint (_("Multiple children of DIE %s refer "
13639 "to DIE %s as their abstract origin"),
13640 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13642 offsetp
= offsets
.data ();
13643 origin_child_die
= origin_die
->child
;
13644 while (origin_child_die
&& origin_child_die
->tag
)
13646 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13647 while (offsetp
< offsets_end
13648 && *offsetp
< origin_child_die
->sect_off
)
13650 if (offsetp
>= offsets_end
13651 || *offsetp
> origin_child_die
->sect_off
)
13653 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13654 Check whether we're already processing ORIGIN_CHILD_DIE.
13655 This can happen with mutually referenced abstract_origins.
13657 if (!origin_child_die
->in_process
)
13658 process_die (origin_child_die
, origin_cu
);
13660 origin_child_die
= sibling_die (origin_child_die
);
13662 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13666 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13668 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13669 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13670 struct context_stack
*newobj
;
13673 struct die_info
*child_die
;
13674 struct attribute
*attr
, *call_line
, *call_file
;
13676 CORE_ADDR baseaddr
;
13677 struct block
*block
;
13678 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13679 std::vector
<struct symbol
*> template_args
;
13680 struct template_symbol
*templ_func
= NULL
;
13684 /* If we do not have call site information, we can't show the
13685 caller of this inlined function. That's too confusing, so
13686 only use the scope for local variables. */
13687 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13688 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13689 if (call_line
== NULL
|| call_file
== NULL
)
13691 read_lexical_block_scope (die
, cu
);
13696 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13698 name
= dwarf2_name (die
, cu
);
13700 /* Ignore functions with missing or empty names. These are actually
13701 illegal according to the DWARF standard. */
13704 complaint (_("missing name for subprogram DIE at %s"),
13705 sect_offset_str (die
->sect_off
));
13709 /* Ignore functions with missing or invalid low and high pc attributes. */
13710 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13711 <= PC_BOUNDS_INVALID
)
13713 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13714 if (!attr
|| !DW_UNSND (attr
))
13715 complaint (_("cannot get low and high bounds "
13716 "for subprogram DIE at %s"),
13717 sect_offset_str (die
->sect_off
));
13721 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13722 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13724 /* If we have any template arguments, then we must allocate a
13725 different sort of symbol. */
13726 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13728 if (child_die
->tag
== DW_TAG_template_type_param
13729 || child_die
->tag
== DW_TAG_template_value_param
)
13731 templ_func
= allocate_template_symbol (objfile
);
13732 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13737 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13738 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13739 (struct symbol
*) templ_func
);
13741 /* If there is a location expression for DW_AT_frame_base, record
13743 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13745 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13747 /* If there is a location for the static link, record it. */
13748 newobj
->static_link
= NULL
;
13749 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13752 newobj
->static_link
13753 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13754 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
13757 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13759 if (die
->child
!= NULL
)
13761 child_die
= die
->child
;
13762 while (child_die
&& child_die
->tag
)
13764 if (child_die
->tag
== DW_TAG_template_type_param
13765 || child_die
->tag
== DW_TAG_template_value_param
)
13767 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13770 template_args
.push_back (arg
);
13773 process_die (child_die
, cu
);
13774 child_die
= sibling_die (child_die
);
13778 inherit_abstract_dies (die
, cu
);
13780 /* If we have a DW_AT_specification, we might need to import using
13781 directives from the context of the specification DIE. See the
13782 comment in determine_prefix. */
13783 if (cu
->language
== language_cplus
13784 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13786 struct dwarf2_cu
*spec_cu
= cu
;
13787 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13791 child_die
= spec_die
->child
;
13792 while (child_die
&& child_die
->tag
)
13794 if (child_die
->tag
== DW_TAG_imported_module
)
13795 process_die (child_die
, spec_cu
);
13796 child_die
= sibling_die (child_die
);
13799 /* In some cases, GCC generates specification DIEs that
13800 themselves contain DW_AT_specification attributes. */
13801 spec_die
= die_specification (spec_die
, &spec_cu
);
13805 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13806 /* Make a block for the local symbols within. */
13807 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13808 cstk
.static_link
, lowpc
, highpc
);
13810 /* For C++, set the block's scope. */
13811 if ((cu
->language
== language_cplus
13812 || cu
->language
== language_fortran
13813 || cu
->language
== language_d
13814 || cu
->language
== language_rust
)
13815 && cu
->processing_has_namespace_info
)
13816 block_set_scope (block
, determine_prefix (die
, cu
),
13817 &objfile
->objfile_obstack
);
13819 /* If we have address ranges, record them. */
13820 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13822 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13824 /* Attach template arguments to function. */
13825 if (!template_args
.empty ())
13827 gdb_assert (templ_func
!= NULL
);
13829 templ_func
->n_template_arguments
= template_args
.size ();
13830 templ_func
->template_arguments
13831 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13832 templ_func
->n_template_arguments
);
13833 memcpy (templ_func
->template_arguments
,
13834 template_args
.data (),
13835 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13837 /* Make sure that the symtab is set on the new symbols. Even
13838 though they don't appear in this symtab directly, other parts
13839 of gdb assume that symbols do, and this is reasonably
13841 for (symbol
*sym
: template_args
)
13842 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13845 /* In C++, we can have functions nested inside functions (e.g., when
13846 a function declares a class that has methods). This means that
13847 when we finish processing a function scope, we may need to go
13848 back to building a containing block's symbol lists. */
13849 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13850 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13852 /* If we've finished processing a top-level function, subsequent
13853 symbols go in the file symbol list. */
13854 if (cu
->get_builder ()->outermost_context_p ())
13855 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13858 /* Process all the DIES contained within a lexical block scope. Start
13859 a new scope, process the dies, and then close the scope. */
13862 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13864 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13865 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13866 CORE_ADDR lowpc
, highpc
;
13867 struct die_info
*child_die
;
13868 CORE_ADDR baseaddr
;
13870 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13872 /* Ignore blocks with missing or invalid low and high pc attributes. */
13873 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13874 as multiple lexical blocks? Handling children in a sane way would
13875 be nasty. Might be easier to properly extend generic blocks to
13876 describe ranges. */
13877 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13879 case PC_BOUNDS_NOT_PRESENT
:
13880 /* DW_TAG_lexical_block has no attributes, process its children as if
13881 there was no wrapping by that DW_TAG_lexical_block.
13882 GCC does no longer produces such DWARF since GCC r224161. */
13883 for (child_die
= die
->child
;
13884 child_die
!= NULL
&& child_die
->tag
;
13885 child_die
= sibling_die (child_die
))
13886 process_die (child_die
, cu
);
13888 case PC_BOUNDS_INVALID
:
13891 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13892 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13894 cu
->get_builder ()->push_context (0, lowpc
);
13895 if (die
->child
!= NULL
)
13897 child_die
= die
->child
;
13898 while (child_die
&& child_die
->tag
)
13900 process_die (child_die
, cu
);
13901 child_die
= sibling_die (child_die
);
13904 inherit_abstract_dies (die
, cu
);
13905 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13907 if (*cu
->get_builder ()->get_local_symbols () != NULL
13908 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13910 struct block
*block
13911 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13912 cstk
.start_addr
, highpc
);
13914 /* Note that recording ranges after traversing children, as we
13915 do here, means that recording a parent's ranges entails
13916 walking across all its children's ranges as they appear in
13917 the address map, which is quadratic behavior.
13919 It would be nicer to record the parent's ranges before
13920 traversing its children, simply overriding whatever you find
13921 there. But since we don't even decide whether to create a
13922 block until after we've traversed its children, that's hard
13924 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13926 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13927 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13930 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13933 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13935 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13936 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13937 CORE_ADDR pc
, baseaddr
;
13938 struct attribute
*attr
;
13939 struct call_site
*call_site
, call_site_local
;
13942 struct die_info
*child_die
;
13944 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13946 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13949 /* This was a pre-DWARF-5 GNU extension alias
13950 for DW_AT_call_return_pc. */
13951 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13955 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13956 "DIE %s [in module %s]"),
13957 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13960 pc
= attr_value_as_address (attr
) + baseaddr
;
13961 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13963 if (cu
->call_site_htab
== NULL
)
13964 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13965 NULL
, &objfile
->objfile_obstack
,
13966 hashtab_obstack_allocate
, NULL
);
13967 call_site_local
.pc
= pc
;
13968 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13971 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13972 "DIE %s [in module %s]"),
13973 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13974 objfile_name (objfile
));
13978 /* Count parameters at the caller. */
13981 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13982 child_die
= sibling_die (child_die
))
13984 if (child_die
->tag
!= DW_TAG_call_site_parameter
13985 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13987 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13988 "DW_TAG_call_site child DIE %s [in module %s]"),
13989 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13990 objfile_name (objfile
));
13998 = ((struct call_site
*)
13999 obstack_alloc (&objfile
->objfile_obstack
,
14000 sizeof (*call_site
)
14001 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
14003 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
14004 call_site
->pc
= pc
;
14006 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
14007 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
14009 struct die_info
*func_die
;
14011 /* Skip also over DW_TAG_inlined_subroutine. */
14012 for (func_die
= die
->parent
;
14013 func_die
&& func_die
->tag
!= DW_TAG_subprogram
14014 && func_die
->tag
!= DW_TAG_subroutine_type
;
14015 func_die
= func_die
->parent
);
14017 /* DW_AT_call_all_calls is a superset
14018 of DW_AT_call_all_tail_calls. */
14020 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
14021 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
14022 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
14023 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
14025 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
14026 not complete. But keep CALL_SITE for look ups via call_site_htab,
14027 both the initial caller containing the real return address PC and
14028 the final callee containing the current PC of a chain of tail
14029 calls do not need to have the tail call list complete. But any
14030 function candidate for a virtual tail call frame searched via
14031 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
14032 determined unambiguously. */
14036 struct type
*func_type
= NULL
;
14039 func_type
= get_die_type (func_die
, cu
);
14040 if (func_type
!= NULL
)
14042 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
14044 /* Enlist this call site to the function. */
14045 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
14046 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
14049 complaint (_("Cannot find function owning DW_TAG_call_site "
14050 "DIE %s [in module %s]"),
14051 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14055 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
14057 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
14059 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
14062 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
14063 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14065 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
14066 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
14067 /* Keep NULL DWARF_BLOCK. */;
14068 else if (attr_form_is_block (attr
))
14070 struct dwarf2_locexpr_baton
*dlbaton
;
14072 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14073 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14074 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14075 dlbaton
->per_cu
= cu
->per_cu
;
14077 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
14079 else if (attr_form_is_ref (attr
))
14081 struct dwarf2_cu
*target_cu
= cu
;
14082 struct die_info
*target_die
;
14084 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14085 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
14086 if (die_is_declaration (target_die
, target_cu
))
14088 const char *target_physname
;
14090 /* Prefer the mangled name; otherwise compute the demangled one. */
14091 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14092 if (target_physname
== NULL
)
14093 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14094 if (target_physname
== NULL
)
14095 complaint (_("DW_AT_call_target target DIE has invalid "
14096 "physname, for referencing DIE %s [in module %s]"),
14097 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14099 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14105 /* DW_AT_entry_pc should be preferred. */
14106 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14107 <= PC_BOUNDS_INVALID
)
14108 complaint (_("DW_AT_call_target target DIE has invalid "
14109 "low pc, for referencing DIE %s [in module %s]"),
14110 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14113 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14114 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14119 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
14120 "block nor reference, for DIE %s [in module %s]"),
14121 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14123 call_site
->per_cu
= cu
->per_cu
;
14125 for (child_die
= die
->child
;
14126 child_die
&& child_die
->tag
;
14127 child_die
= sibling_die (child_die
))
14129 struct call_site_parameter
*parameter
;
14130 struct attribute
*loc
, *origin
;
14132 if (child_die
->tag
!= DW_TAG_call_site_parameter
14133 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14135 /* Already printed the complaint above. */
14139 gdb_assert (call_site
->parameter_count
< nparams
);
14140 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14142 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14143 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14144 register is contained in DW_AT_call_value. */
14146 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14147 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14148 if (origin
== NULL
)
14150 /* This was a pre-DWARF-5 GNU extension alias
14151 for DW_AT_call_parameter. */
14152 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14154 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14156 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14158 sect_offset sect_off
14159 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14160 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14162 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14163 binding can be done only inside one CU. Such referenced DIE
14164 therefore cannot be even moved to DW_TAG_partial_unit. */
14165 complaint (_("DW_AT_call_parameter offset is not in CU for "
14166 "DW_TAG_call_site child DIE %s [in module %s]"),
14167 sect_offset_str (child_die
->sect_off
),
14168 objfile_name (objfile
));
14171 parameter
->u
.param_cu_off
14172 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14174 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14176 complaint (_("No DW_FORM_block* DW_AT_location for "
14177 "DW_TAG_call_site child DIE %s [in module %s]"),
14178 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14183 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14184 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14185 if (parameter
->u
.dwarf_reg
!= -1)
14186 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14187 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14188 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14189 ¶meter
->u
.fb_offset
))
14190 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14193 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
14194 "for DW_FORM_block* DW_AT_location is supported for "
14195 "DW_TAG_call_site child DIE %s "
14197 sect_offset_str (child_die
->sect_off
),
14198 objfile_name (objfile
));
14203 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14205 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14206 if (!attr_form_is_block (attr
))
14208 complaint (_("No DW_FORM_block* DW_AT_call_value for "
14209 "DW_TAG_call_site child DIE %s [in module %s]"),
14210 sect_offset_str (child_die
->sect_off
),
14211 objfile_name (objfile
));
14214 parameter
->value
= DW_BLOCK (attr
)->data
;
14215 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14217 /* Parameters are not pre-cleared by memset above. */
14218 parameter
->data_value
= NULL
;
14219 parameter
->data_value_size
= 0;
14220 call_site
->parameter_count
++;
14222 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14224 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14227 if (!attr_form_is_block (attr
))
14228 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
14229 "DW_TAG_call_site child DIE %s [in module %s]"),
14230 sect_offset_str (child_die
->sect_off
),
14231 objfile_name (objfile
));
14234 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14235 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14241 /* Helper function for read_variable. If DIE represents a virtual
14242 table, then return the type of the concrete object that is
14243 associated with the virtual table. Otherwise, return NULL. */
14245 static struct type
*
14246 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14248 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14252 /* Find the type DIE. */
14253 struct die_info
*type_die
= NULL
;
14254 struct dwarf2_cu
*type_cu
= cu
;
14256 if (attr_form_is_ref (attr
))
14257 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14258 if (type_die
== NULL
)
14261 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14263 return die_containing_type (type_die
, type_cu
);
14266 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14269 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14271 struct rust_vtable_symbol
*storage
= NULL
;
14273 if (cu
->language
== language_rust
)
14275 struct type
*containing_type
= rust_containing_type (die
, cu
);
14277 if (containing_type
!= NULL
)
14279 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14281 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14282 struct rust_vtable_symbol
);
14283 initialize_objfile_symbol (storage
);
14284 storage
->concrete_type
= containing_type
;
14285 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14289 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
14290 struct attribute
*abstract_origin
14291 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14292 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
14293 if (res
== NULL
&& loc
&& abstract_origin
)
14295 /* We have a variable without a name, but with a location and an abstract
14296 origin. This may be a concrete instance of an abstract variable
14297 referenced from an DW_OP_GNU_variable_value, so save it to find it back
14299 struct dwarf2_cu
*origin_cu
= cu
;
14300 struct die_info
*origin_die
14301 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
14302 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
14303 dpo
->abstract_to_concrete
[origin_die
].push_back (die
);
14307 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14308 reading .debug_rnglists.
14309 Callback's type should be:
14310 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14311 Return true if the attributes are present and valid, otherwise,
14314 template <typename Callback
>
14316 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14317 Callback
&&callback
)
14319 struct dwarf2_per_objfile
*dwarf2_per_objfile
14320 = cu
->per_cu
->dwarf2_per_objfile
;
14321 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14322 bfd
*obfd
= objfile
->obfd
;
14323 /* Base address selection entry. */
14326 const gdb_byte
*buffer
;
14327 CORE_ADDR baseaddr
;
14328 bool overflow
= false;
14330 found_base
= cu
->base_known
;
14331 base
= cu
->base_address
;
14333 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14334 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14336 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14340 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14342 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14346 /* Initialize it due to a false compiler warning. */
14347 CORE_ADDR range_beginning
= 0, range_end
= 0;
14348 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14349 + dwarf2_per_objfile
->rnglists
.size
);
14350 unsigned int bytes_read
;
14352 if (buffer
== buf_end
)
14357 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14360 case DW_RLE_end_of_list
:
14362 case DW_RLE_base_address
:
14363 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14368 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14370 buffer
+= bytes_read
;
14372 case DW_RLE_start_length
:
14373 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14378 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14379 buffer
+= bytes_read
;
14380 range_end
= (range_beginning
14381 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14382 buffer
+= bytes_read
;
14383 if (buffer
> buf_end
)
14389 case DW_RLE_offset_pair
:
14390 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14391 buffer
+= bytes_read
;
14392 if (buffer
> buf_end
)
14397 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14398 buffer
+= bytes_read
;
14399 if (buffer
> buf_end
)
14405 case DW_RLE_start_end
:
14406 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14411 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14412 buffer
+= bytes_read
;
14413 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14414 buffer
+= bytes_read
;
14417 complaint (_("Invalid .debug_rnglists data (no base address)"));
14420 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14422 if (rlet
== DW_RLE_base_address
)
14427 /* We have no valid base address for the ranges
14429 complaint (_("Invalid .debug_rnglists data (no base address)"));
14433 if (range_beginning
> range_end
)
14435 /* Inverted range entries are invalid. */
14436 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14440 /* Empty range entries have no effect. */
14441 if (range_beginning
== range_end
)
14444 range_beginning
+= base
;
14447 /* A not-uncommon case of bad debug info.
14448 Don't pollute the addrmap with bad data. */
14449 if (range_beginning
+ baseaddr
== 0
14450 && !dwarf2_per_objfile
->has_section_at_zero
)
14452 complaint (_(".debug_rnglists entry has start address of zero"
14453 " [in module %s]"), objfile_name (objfile
));
14457 callback (range_beginning
, range_end
);
14462 complaint (_("Offset %d is not terminated "
14463 "for DW_AT_ranges attribute"),
14471 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14472 Callback's type should be:
14473 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14474 Return 1 if the attributes are present and valid, otherwise, return 0. */
14476 template <typename Callback
>
14478 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14479 Callback
&&callback
)
14481 struct dwarf2_per_objfile
*dwarf2_per_objfile
14482 = cu
->per_cu
->dwarf2_per_objfile
;
14483 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14484 struct comp_unit_head
*cu_header
= &cu
->header
;
14485 bfd
*obfd
= objfile
->obfd
;
14486 unsigned int addr_size
= cu_header
->addr_size
;
14487 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14488 /* Base address selection entry. */
14491 unsigned int dummy
;
14492 const gdb_byte
*buffer
;
14493 CORE_ADDR baseaddr
;
14495 if (cu_header
->version
>= 5)
14496 return dwarf2_rnglists_process (offset
, cu
, callback
);
14498 found_base
= cu
->base_known
;
14499 base
= cu
->base_address
;
14501 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14502 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14504 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14508 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14510 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14514 CORE_ADDR range_beginning
, range_end
;
14516 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14517 buffer
+= addr_size
;
14518 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14519 buffer
+= addr_size
;
14520 offset
+= 2 * addr_size
;
14522 /* An end of list marker is a pair of zero addresses. */
14523 if (range_beginning
== 0 && range_end
== 0)
14524 /* Found the end of list entry. */
14527 /* Each base address selection entry is a pair of 2 values.
14528 The first is the largest possible address, the second is
14529 the base address. Check for a base address here. */
14530 if ((range_beginning
& mask
) == mask
)
14532 /* If we found the largest possible address, then we already
14533 have the base address in range_end. */
14541 /* We have no valid base address for the ranges
14543 complaint (_("Invalid .debug_ranges data (no base address)"));
14547 if (range_beginning
> range_end
)
14549 /* Inverted range entries are invalid. */
14550 complaint (_("Invalid .debug_ranges data (inverted range)"));
14554 /* Empty range entries have no effect. */
14555 if (range_beginning
== range_end
)
14558 range_beginning
+= base
;
14561 /* A not-uncommon case of bad debug info.
14562 Don't pollute the addrmap with bad data. */
14563 if (range_beginning
+ baseaddr
== 0
14564 && !dwarf2_per_objfile
->has_section_at_zero
)
14566 complaint (_(".debug_ranges entry has start address of zero"
14567 " [in module %s]"), objfile_name (objfile
));
14571 callback (range_beginning
, range_end
);
14577 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14578 Return 1 if the attributes are present and valid, otherwise, return 0.
14579 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14582 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14583 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14584 struct partial_symtab
*ranges_pst
)
14586 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14587 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14588 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14589 SECT_OFF_TEXT (objfile
));
14592 CORE_ADDR high
= 0;
14595 retval
= dwarf2_ranges_process (offset
, cu
,
14596 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14598 if (ranges_pst
!= NULL
)
14603 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14604 range_beginning
+ baseaddr
)
14606 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14607 range_end
+ baseaddr
)
14609 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
14610 lowpc
, highpc
- 1, ranges_pst
);
14613 /* FIXME: This is recording everything as a low-high
14614 segment of consecutive addresses. We should have a
14615 data structure for discontiguous block ranges
14619 low
= range_beginning
;
14625 if (range_beginning
< low
)
14626 low
= range_beginning
;
14627 if (range_end
> high
)
14635 /* If the first entry is an end-of-list marker, the range
14636 describes an empty scope, i.e. no instructions. */
14642 *high_return
= high
;
14646 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14647 definition for the return value. *LOWPC and *HIGHPC are set iff
14648 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14650 static enum pc_bounds_kind
14651 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14652 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14653 struct partial_symtab
*pst
)
14655 struct dwarf2_per_objfile
*dwarf2_per_objfile
14656 = cu
->per_cu
->dwarf2_per_objfile
;
14657 struct attribute
*attr
;
14658 struct attribute
*attr_high
;
14660 CORE_ADDR high
= 0;
14661 enum pc_bounds_kind ret
;
14663 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14666 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14669 low
= attr_value_as_address (attr
);
14670 high
= attr_value_as_address (attr_high
);
14671 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14675 /* Found high w/o low attribute. */
14676 return PC_BOUNDS_INVALID
;
14678 /* Found consecutive range of addresses. */
14679 ret
= PC_BOUNDS_HIGH_LOW
;
14683 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14686 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14687 We take advantage of the fact that DW_AT_ranges does not appear
14688 in DW_TAG_compile_unit of DWO files. */
14689 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14690 unsigned int ranges_offset
= (DW_UNSND (attr
)
14691 + (need_ranges_base
14695 /* Value of the DW_AT_ranges attribute is the offset in the
14696 .debug_ranges section. */
14697 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14698 return PC_BOUNDS_INVALID
;
14699 /* Found discontinuous range of addresses. */
14700 ret
= PC_BOUNDS_RANGES
;
14703 return PC_BOUNDS_NOT_PRESENT
;
14706 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14708 return PC_BOUNDS_INVALID
;
14710 /* When using the GNU linker, .gnu.linkonce. sections are used to
14711 eliminate duplicate copies of functions and vtables and such.
14712 The linker will arbitrarily choose one and discard the others.
14713 The AT_*_pc values for such functions refer to local labels in
14714 these sections. If the section from that file was discarded, the
14715 labels are not in the output, so the relocs get a value of 0.
14716 If this is a discarded function, mark the pc bounds as invalid,
14717 so that GDB will ignore it. */
14718 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14719 return PC_BOUNDS_INVALID
;
14727 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14728 its low and high PC addresses. Do nothing if these addresses could not
14729 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14730 and HIGHPC to the high address if greater than HIGHPC. */
14733 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14734 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14735 struct dwarf2_cu
*cu
)
14737 CORE_ADDR low
, high
;
14738 struct die_info
*child
= die
->child
;
14740 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14742 *lowpc
= std::min (*lowpc
, low
);
14743 *highpc
= std::max (*highpc
, high
);
14746 /* If the language does not allow nested subprograms (either inside
14747 subprograms or lexical blocks), we're done. */
14748 if (cu
->language
!= language_ada
)
14751 /* Check all the children of the given DIE. If it contains nested
14752 subprograms, then check their pc bounds. Likewise, we need to
14753 check lexical blocks as well, as they may also contain subprogram
14755 while (child
&& child
->tag
)
14757 if (child
->tag
== DW_TAG_subprogram
14758 || child
->tag
== DW_TAG_lexical_block
)
14759 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14760 child
= sibling_die (child
);
14764 /* Get the low and high pc's represented by the scope DIE, and store
14765 them in *LOWPC and *HIGHPC. If the correct values can't be
14766 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14769 get_scope_pc_bounds (struct die_info
*die
,
14770 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14771 struct dwarf2_cu
*cu
)
14773 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14774 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14775 CORE_ADDR current_low
, current_high
;
14777 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14778 >= PC_BOUNDS_RANGES
)
14780 best_low
= current_low
;
14781 best_high
= current_high
;
14785 struct die_info
*child
= die
->child
;
14787 while (child
&& child
->tag
)
14789 switch (child
->tag
) {
14790 case DW_TAG_subprogram
:
14791 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14793 case DW_TAG_namespace
:
14794 case DW_TAG_module
:
14795 /* FIXME: carlton/2004-01-16: Should we do this for
14796 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14797 that current GCC's always emit the DIEs corresponding
14798 to definitions of methods of classes as children of a
14799 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14800 the DIEs giving the declarations, which could be
14801 anywhere). But I don't see any reason why the
14802 standards says that they have to be there. */
14803 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14805 if (current_low
!= ((CORE_ADDR
) -1))
14807 best_low
= std::min (best_low
, current_low
);
14808 best_high
= std::max (best_high
, current_high
);
14816 child
= sibling_die (child
);
14821 *highpc
= best_high
;
14824 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14828 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14829 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14831 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14832 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14833 struct attribute
*attr
;
14834 struct attribute
*attr_high
;
14836 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14839 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14842 CORE_ADDR low
= attr_value_as_address (attr
);
14843 CORE_ADDR high
= attr_value_as_address (attr_high
);
14845 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14848 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14849 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14850 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14854 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14857 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14858 We take advantage of the fact that DW_AT_ranges does not appear
14859 in DW_TAG_compile_unit of DWO files. */
14860 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14862 /* The value of the DW_AT_ranges attribute is the offset of the
14863 address range list in the .debug_ranges section. */
14864 unsigned long offset
= (DW_UNSND (attr
)
14865 + (need_ranges_base
? cu
->ranges_base
: 0));
14867 std::vector
<blockrange
> blockvec
;
14868 dwarf2_ranges_process (offset
, cu
,
14869 [&] (CORE_ADDR start
, CORE_ADDR end
)
14873 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14874 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14875 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14876 blockvec
.emplace_back (start
, end
);
14879 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14883 /* Check whether the producer field indicates either of GCC < 4.6, or the
14884 Intel C/C++ compiler, and cache the result in CU. */
14887 check_producer (struct dwarf2_cu
*cu
)
14891 if (cu
->producer
== NULL
)
14893 /* For unknown compilers expect their behavior is DWARF version
14896 GCC started to support .debug_types sections by -gdwarf-4 since
14897 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14898 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14899 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14900 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14902 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14904 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14905 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14907 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14909 cu
->producer_is_icc
= true;
14910 cu
->producer_is_icc_lt_14
= major
< 14;
14912 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14913 cu
->producer_is_codewarrior
= true;
14916 /* For other non-GCC compilers, expect their behavior is DWARF version
14920 cu
->checked_producer
= true;
14923 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14924 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14925 during 4.6.0 experimental. */
14928 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14930 if (!cu
->checked_producer
)
14931 check_producer (cu
);
14933 return cu
->producer_is_gxx_lt_4_6
;
14937 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14938 with incorrect is_stmt attributes. */
14941 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14943 if (!cu
->checked_producer
)
14944 check_producer (cu
);
14946 return cu
->producer_is_codewarrior
;
14949 /* Return the default accessibility type if it is not overriden by
14950 DW_AT_accessibility. */
14952 static enum dwarf_access_attribute
14953 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14955 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14957 /* The default DWARF 2 accessibility for members is public, the default
14958 accessibility for inheritance is private. */
14960 if (die
->tag
!= DW_TAG_inheritance
)
14961 return DW_ACCESS_public
;
14963 return DW_ACCESS_private
;
14967 /* DWARF 3+ defines the default accessibility a different way. The same
14968 rules apply now for DW_TAG_inheritance as for the members and it only
14969 depends on the container kind. */
14971 if (die
->parent
->tag
== DW_TAG_class_type
)
14972 return DW_ACCESS_private
;
14974 return DW_ACCESS_public
;
14978 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14979 offset. If the attribute was not found return 0, otherwise return
14980 1. If it was found but could not properly be handled, set *OFFSET
14984 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14987 struct attribute
*attr
;
14989 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14994 /* Note that we do not check for a section offset first here.
14995 This is because DW_AT_data_member_location is new in DWARF 4,
14996 so if we see it, we can assume that a constant form is really
14997 a constant and not a section offset. */
14998 if (attr_form_is_constant (attr
))
14999 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
15000 else if (attr_form_is_section_offset (attr
))
15001 dwarf2_complex_location_expr_complaint ();
15002 else if (attr_form_is_block (attr
))
15003 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15005 dwarf2_complex_location_expr_complaint ();
15013 /* Add an aggregate field to the field list. */
15016 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
15017 struct dwarf2_cu
*cu
)
15019 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15020 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15021 struct nextfield
*new_field
;
15022 struct attribute
*attr
;
15024 const char *fieldname
= "";
15026 if (die
->tag
== DW_TAG_inheritance
)
15028 fip
->baseclasses
.emplace_back ();
15029 new_field
= &fip
->baseclasses
.back ();
15033 fip
->fields
.emplace_back ();
15034 new_field
= &fip
->fields
.back ();
15039 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15041 new_field
->accessibility
= DW_UNSND (attr
);
15043 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
15044 if (new_field
->accessibility
!= DW_ACCESS_public
)
15045 fip
->non_public_fields
= 1;
15047 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15049 new_field
->virtuality
= DW_UNSND (attr
);
15051 new_field
->virtuality
= DW_VIRTUALITY_none
;
15053 fp
= &new_field
->field
;
15055 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
15059 /* Data member other than a C++ static data member. */
15061 /* Get type of field. */
15062 fp
->type
= die_type (die
, cu
);
15064 SET_FIELD_BITPOS (*fp
, 0);
15066 /* Get bit size of field (zero if none). */
15067 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
15070 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
15074 FIELD_BITSIZE (*fp
) = 0;
15077 /* Get bit offset of field. */
15078 if (handle_data_member_location (die
, cu
, &offset
))
15079 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15080 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
15083 if (gdbarch_bits_big_endian (gdbarch
))
15085 /* For big endian bits, the DW_AT_bit_offset gives the
15086 additional bit offset from the MSB of the containing
15087 anonymous object to the MSB of the field. We don't
15088 have to do anything special since we don't need to
15089 know the size of the anonymous object. */
15090 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
15094 /* For little endian bits, compute the bit offset to the
15095 MSB of the anonymous object, subtract off the number of
15096 bits from the MSB of the field to the MSB of the
15097 object, and then subtract off the number of bits of
15098 the field itself. The result is the bit offset of
15099 the LSB of the field. */
15100 int anonymous_size
;
15101 int bit_offset
= DW_UNSND (attr
);
15103 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15106 /* The size of the anonymous object containing
15107 the bit field is explicit, so use the
15108 indicated size (in bytes). */
15109 anonymous_size
= DW_UNSND (attr
);
15113 /* The size of the anonymous object containing
15114 the bit field must be inferred from the type
15115 attribute of the data member containing the
15117 anonymous_size
= TYPE_LENGTH (fp
->type
);
15119 SET_FIELD_BITPOS (*fp
,
15120 (FIELD_BITPOS (*fp
)
15121 + anonymous_size
* bits_per_byte
15122 - bit_offset
- FIELD_BITSIZE (*fp
)));
15125 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15127 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15128 + dwarf2_get_attr_constant_value (attr
, 0)));
15130 /* Get name of field. */
15131 fieldname
= dwarf2_name (die
, cu
);
15132 if (fieldname
== NULL
)
15135 /* The name is already allocated along with this objfile, so we don't
15136 need to duplicate it for the type. */
15137 fp
->name
= fieldname
;
15139 /* Change accessibility for artificial fields (e.g. virtual table
15140 pointer or virtual base class pointer) to private. */
15141 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15143 FIELD_ARTIFICIAL (*fp
) = 1;
15144 new_field
->accessibility
= DW_ACCESS_private
;
15145 fip
->non_public_fields
= 1;
15148 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15150 /* C++ static member. */
15152 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15153 is a declaration, but all versions of G++ as of this writing
15154 (so through at least 3.2.1) incorrectly generate
15155 DW_TAG_variable tags. */
15157 const char *physname
;
15159 /* Get name of field. */
15160 fieldname
= dwarf2_name (die
, cu
);
15161 if (fieldname
== NULL
)
15164 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15166 /* Only create a symbol if this is an external value.
15167 new_symbol checks this and puts the value in the global symbol
15168 table, which we want. If it is not external, new_symbol
15169 will try to put the value in cu->list_in_scope which is wrong. */
15170 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15172 /* A static const member, not much different than an enum as far as
15173 we're concerned, except that we can support more types. */
15174 new_symbol (die
, NULL
, cu
);
15177 /* Get physical name. */
15178 physname
= dwarf2_physname (fieldname
, die
, cu
);
15180 /* The name is already allocated along with this objfile, so we don't
15181 need to duplicate it for the type. */
15182 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15183 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15184 FIELD_NAME (*fp
) = fieldname
;
15186 else if (die
->tag
== DW_TAG_inheritance
)
15190 /* C++ base class field. */
15191 if (handle_data_member_location (die
, cu
, &offset
))
15192 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15193 FIELD_BITSIZE (*fp
) = 0;
15194 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15195 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
15197 else if (die
->tag
== DW_TAG_variant_part
)
15199 /* process_structure_scope will treat this DIE as a union. */
15200 process_structure_scope (die
, cu
);
15202 /* The variant part is relative to the start of the enclosing
15204 SET_FIELD_BITPOS (*fp
, 0);
15205 fp
->type
= get_die_type (die
, cu
);
15206 fp
->artificial
= 1;
15207 fp
->name
= "<<variant>>";
15209 /* Normally a DW_TAG_variant_part won't have a size, but our
15210 representation requires one, so set it to the maximum of the
15212 if (TYPE_LENGTH (fp
->type
) == 0)
15215 for (int i
= 0; i
< TYPE_NFIELDS (fp
->type
); ++i
)
15216 if (TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
)) > max
)
15217 max
= TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
));
15218 TYPE_LENGTH (fp
->type
) = max
;
15222 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15225 /* Can the type given by DIE define another type? */
15228 type_can_define_types (const struct die_info
*die
)
15232 case DW_TAG_typedef
:
15233 case DW_TAG_class_type
:
15234 case DW_TAG_structure_type
:
15235 case DW_TAG_union_type
:
15236 case DW_TAG_enumeration_type
:
15244 /* Add a type definition defined in the scope of the FIP's class. */
15247 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15248 struct dwarf2_cu
*cu
)
15250 struct decl_field fp
;
15251 memset (&fp
, 0, sizeof (fp
));
15253 gdb_assert (type_can_define_types (die
));
15255 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15256 fp
.name
= dwarf2_name (die
, cu
);
15257 fp
.type
= read_type_die (die
, cu
);
15259 /* Save accessibility. */
15260 enum dwarf_access_attribute accessibility
;
15261 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15263 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15265 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15266 switch (accessibility
)
15268 case DW_ACCESS_public
:
15269 /* The assumed value if neither private nor protected. */
15271 case DW_ACCESS_private
:
15274 case DW_ACCESS_protected
:
15275 fp
.is_protected
= 1;
15278 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15281 if (die
->tag
== DW_TAG_typedef
)
15282 fip
->typedef_field_list
.push_back (fp
);
15284 fip
->nested_types_list
.push_back (fp
);
15287 /* Create the vector of fields, and attach it to the type. */
15290 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15291 struct dwarf2_cu
*cu
)
15293 int nfields
= fip
->nfields
;
15295 /* Record the field count, allocate space for the array of fields,
15296 and create blank accessibility bitfields if necessary. */
15297 TYPE_NFIELDS (type
) = nfields
;
15298 TYPE_FIELDS (type
) = (struct field
*)
15299 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15301 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15303 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15305 TYPE_FIELD_PRIVATE_BITS (type
) =
15306 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15307 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15309 TYPE_FIELD_PROTECTED_BITS (type
) =
15310 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15311 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15313 TYPE_FIELD_IGNORE_BITS (type
) =
15314 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15315 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15318 /* If the type has baseclasses, allocate and clear a bit vector for
15319 TYPE_FIELD_VIRTUAL_BITS. */
15320 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15322 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15323 unsigned char *pointer
;
15325 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15326 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15327 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15328 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15329 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15332 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15334 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15336 for (int index
= 0; index
< nfields
; ++index
)
15338 struct nextfield
&field
= fip
->fields
[index
];
15340 if (field
.variant
.is_discriminant
)
15341 di
->discriminant_index
= index
;
15342 else if (field
.variant
.default_branch
)
15343 di
->default_index
= index
;
15345 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15349 /* Copy the saved-up fields into the field vector. */
15350 for (int i
= 0; i
< nfields
; ++i
)
15352 struct nextfield
&field
15353 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15354 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15356 TYPE_FIELD (type
, i
) = field
.field
;
15357 switch (field
.accessibility
)
15359 case DW_ACCESS_private
:
15360 if (cu
->language
!= language_ada
)
15361 SET_TYPE_FIELD_PRIVATE (type
, i
);
15364 case DW_ACCESS_protected
:
15365 if (cu
->language
!= language_ada
)
15366 SET_TYPE_FIELD_PROTECTED (type
, i
);
15369 case DW_ACCESS_public
:
15373 /* Unknown accessibility. Complain and treat it as public. */
15375 complaint (_("unsupported accessibility %d"),
15376 field
.accessibility
);
15380 if (i
< fip
->baseclasses
.size ())
15382 switch (field
.virtuality
)
15384 case DW_VIRTUALITY_virtual
:
15385 case DW_VIRTUALITY_pure_virtual
:
15386 if (cu
->language
== language_ada
)
15387 error (_("unexpected virtuality in component of Ada type"));
15388 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15395 /* Return true if this member function is a constructor, false
15399 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15401 const char *fieldname
;
15402 const char *type_name
;
15405 if (die
->parent
== NULL
)
15408 if (die
->parent
->tag
!= DW_TAG_structure_type
15409 && die
->parent
->tag
!= DW_TAG_union_type
15410 && die
->parent
->tag
!= DW_TAG_class_type
)
15413 fieldname
= dwarf2_name (die
, cu
);
15414 type_name
= dwarf2_name (die
->parent
, cu
);
15415 if (fieldname
== NULL
|| type_name
== NULL
)
15418 len
= strlen (fieldname
);
15419 return (strncmp (fieldname
, type_name
, len
) == 0
15420 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15423 /* Add a member function to the proper fieldlist. */
15426 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15427 struct type
*type
, struct dwarf2_cu
*cu
)
15429 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15430 struct attribute
*attr
;
15432 struct fnfieldlist
*flp
= nullptr;
15433 struct fn_field
*fnp
;
15434 const char *fieldname
;
15435 struct type
*this_type
;
15436 enum dwarf_access_attribute accessibility
;
15438 if (cu
->language
== language_ada
)
15439 error (_("unexpected member function in Ada type"));
15441 /* Get name of member function. */
15442 fieldname
= dwarf2_name (die
, cu
);
15443 if (fieldname
== NULL
)
15446 /* Look up member function name in fieldlist. */
15447 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15449 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15451 flp
= &fip
->fnfieldlists
[i
];
15456 /* Create a new fnfieldlist if necessary. */
15457 if (flp
== nullptr)
15459 fip
->fnfieldlists
.emplace_back ();
15460 flp
= &fip
->fnfieldlists
.back ();
15461 flp
->name
= fieldname
;
15462 i
= fip
->fnfieldlists
.size () - 1;
15465 /* Create a new member function field and add it to the vector of
15467 flp
->fnfields
.emplace_back ();
15468 fnp
= &flp
->fnfields
.back ();
15470 /* Delay processing of the physname until later. */
15471 if (cu
->language
== language_cplus
)
15472 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15476 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15477 fnp
->physname
= physname
? physname
: "";
15480 fnp
->type
= alloc_type (objfile
);
15481 this_type
= read_type_die (die
, cu
);
15482 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15484 int nparams
= TYPE_NFIELDS (this_type
);
15486 /* TYPE is the domain of this method, and THIS_TYPE is the type
15487 of the method itself (TYPE_CODE_METHOD). */
15488 smash_to_method_type (fnp
->type
, type
,
15489 TYPE_TARGET_TYPE (this_type
),
15490 TYPE_FIELDS (this_type
),
15491 TYPE_NFIELDS (this_type
),
15492 TYPE_VARARGS (this_type
));
15494 /* Handle static member functions.
15495 Dwarf2 has no clean way to discern C++ static and non-static
15496 member functions. G++ helps GDB by marking the first
15497 parameter for non-static member functions (which is the this
15498 pointer) as artificial. We obtain this information from
15499 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15500 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15501 fnp
->voffset
= VOFFSET_STATIC
;
15504 complaint (_("member function type missing for '%s'"),
15505 dwarf2_full_name (fieldname
, die
, cu
));
15507 /* Get fcontext from DW_AT_containing_type if present. */
15508 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15509 fnp
->fcontext
= die_containing_type (die
, cu
);
15511 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15512 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15514 /* Get accessibility. */
15515 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15517 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15519 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15520 switch (accessibility
)
15522 case DW_ACCESS_private
:
15523 fnp
->is_private
= 1;
15525 case DW_ACCESS_protected
:
15526 fnp
->is_protected
= 1;
15530 /* Check for artificial methods. */
15531 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15532 if (attr
&& DW_UNSND (attr
) != 0)
15533 fnp
->is_artificial
= 1;
15535 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15537 /* Get index in virtual function table if it is a virtual member
15538 function. For older versions of GCC, this is an offset in the
15539 appropriate virtual table, as specified by DW_AT_containing_type.
15540 For everyone else, it is an expression to be evaluated relative
15541 to the object address. */
15543 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15546 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15548 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15550 /* Old-style GCC. */
15551 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15553 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15554 || (DW_BLOCK (attr
)->size
> 1
15555 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15556 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15558 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15559 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15560 dwarf2_complex_location_expr_complaint ();
15562 fnp
->voffset
/= cu
->header
.addr_size
;
15566 dwarf2_complex_location_expr_complaint ();
15568 if (!fnp
->fcontext
)
15570 /* If there is no `this' field and no DW_AT_containing_type,
15571 we cannot actually find a base class context for the
15573 if (TYPE_NFIELDS (this_type
) == 0
15574 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15576 complaint (_("cannot determine context for virtual member "
15577 "function \"%s\" (offset %s)"),
15578 fieldname
, sect_offset_str (die
->sect_off
));
15583 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15587 else if (attr_form_is_section_offset (attr
))
15589 dwarf2_complex_location_expr_complaint ();
15593 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15599 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15600 if (attr
&& DW_UNSND (attr
))
15602 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15603 complaint (_("Member function \"%s\" (offset %s) is virtual "
15604 "but the vtable offset is not specified"),
15605 fieldname
, sect_offset_str (die
->sect_off
));
15606 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15607 TYPE_CPLUS_DYNAMIC (type
) = 1;
15612 /* Create the vector of member function fields, and attach it to the type. */
15615 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15616 struct dwarf2_cu
*cu
)
15618 if (cu
->language
== language_ada
)
15619 error (_("unexpected member functions in Ada type"));
15621 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15622 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15624 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15626 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15628 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15629 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15631 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15632 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15633 fn_flp
->fn_fields
= (struct fn_field
*)
15634 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15636 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15637 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15640 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15643 /* Returns non-zero if NAME is the name of a vtable member in CU's
15644 language, zero otherwise. */
15646 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15648 static const char vptr
[] = "_vptr";
15650 /* Look for the C++ form of the vtable. */
15651 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15657 /* GCC outputs unnamed structures that are really pointers to member
15658 functions, with the ABI-specified layout. If TYPE describes
15659 such a structure, smash it into a member function type.
15661 GCC shouldn't do this; it should just output pointer to member DIEs.
15662 This is GCC PR debug/28767. */
15665 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15667 struct type
*pfn_type
, *self_type
, *new_type
;
15669 /* Check for a structure with no name and two children. */
15670 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15673 /* Check for __pfn and __delta members. */
15674 if (TYPE_FIELD_NAME (type
, 0) == NULL
15675 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15676 || TYPE_FIELD_NAME (type
, 1) == NULL
15677 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15680 /* Find the type of the method. */
15681 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15682 if (pfn_type
== NULL
15683 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15684 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15687 /* Look for the "this" argument. */
15688 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15689 if (TYPE_NFIELDS (pfn_type
) == 0
15690 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15691 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15694 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15695 new_type
= alloc_type (objfile
);
15696 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15697 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15698 TYPE_VARARGS (pfn_type
));
15699 smash_to_methodptr_type (type
, new_type
);
15702 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15703 appropriate error checking and issuing complaints if there is a
15707 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15709 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15711 if (attr
== nullptr)
15714 if (!attr_form_is_constant (attr
))
15716 complaint (_("DW_AT_alignment must have constant form"
15717 " - DIE at %s [in module %s]"),
15718 sect_offset_str (die
->sect_off
),
15719 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15724 if (attr
->form
== DW_FORM_sdata
)
15726 LONGEST val
= DW_SND (attr
);
15729 complaint (_("DW_AT_alignment value must not be negative"
15730 " - DIE at %s [in module %s]"),
15731 sect_offset_str (die
->sect_off
),
15732 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15738 align
= DW_UNSND (attr
);
15742 complaint (_("DW_AT_alignment value must not be zero"
15743 " - DIE at %s [in module %s]"),
15744 sect_offset_str (die
->sect_off
),
15745 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15748 if ((align
& (align
- 1)) != 0)
15750 complaint (_("DW_AT_alignment value must be a power of 2"
15751 " - DIE at %s [in module %s]"),
15752 sect_offset_str (die
->sect_off
),
15753 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15760 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15761 the alignment for TYPE. */
15764 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15767 if (!set_type_align (type
, get_alignment (cu
, die
)))
15768 complaint (_("DW_AT_alignment value too large"
15769 " - DIE at %s [in module %s]"),
15770 sect_offset_str (die
->sect_off
),
15771 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15774 /* Called when we find the DIE that starts a structure or union scope
15775 (definition) to create a type for the structure or union. Fill in
15776 the type's name and general properties; the members will not be
15777 processed until process_structure_scope. A symbol table entry for
15778 the type will also not be done until process_structure_scope (assuming
15779 the type has a name).
15781 NOTE: we need to call these functions regardless of whether or not the
15782 DIE has a DW_AT_name attribute, since it might be an anonymous
15783 structure or union. This gets the type entered into our set of
15784 user defined types. */
15786 static struct type
*
15787 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15789 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15791 struct attribute
*attr
;
15794 /* If the definition of this type lives in .debug_types, read that type.
15795 Don't follow DW_AT_specification though, that will take us back up
15796 the chain and we want to go down. */
15797 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15800 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15802 /* The type's CU may not be the same as CU.
15803 Ensure TYPE is recorded with CU in die_type_hash. */
15804 return set_die_type (die
, type
, cu
);
15807 type
= alloc_type (objfile
);
15808 INIT_CPLUS_SPECIFIC (type
);
15810 name
= dwarf2_name (die
, cu
);
15813 if (cu
->language
== language_cplus
15814 || cu
->language
== language_d
15815 || cu
->language
== language_rust
)
15817 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15819 /* dwarf2_full_name might have already finished building the DIE's
15820 type. If so, there is no need to continue. */
15821 if (get_die_type (die
, cu
) != NULL
)
15822 return get_die_type (die
, cu
);
15824 TYPE_NAME (type
) = full_name
;
15828 /* The name is already allocated along with this objfile, so
15829 we don't need to duplicate it for the type. */
15830 TYPE_NAME (type
) = name
;
15834 if (die
->tag
== DW_TAG_structure_type
)
15836 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15838 else if (die
->tag
== DW_TAG_union_type
)
15840 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15842 else if (die
->tag
== DW_TAG_variant_part
)
15844 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15845 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15849 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15852 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15853 TYPE_DECLARED_CLASS (type
) = 1;
15855 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15858 if (attr_form_is_constant (attr
))
15859 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15862 /* For the moment, dynamic type sizes are not supported
15863 by GDB's struct type. The actual size is determined
15864 on-demand when resolving the type of a given object,
15865 so set the type's length to zero for now. Otherwise,
15866 we record an expression as the length, and that expression
15867 could lead to a very large value, which could eventually
15868 lead to us trying to allocate that much memory when creating
15869 a value of that type. */
15870 TYPE_LENGTH (type
) = 0;
15875 TYPE_LENGTH (type
) = 0;
15878 maybe_set_alignment (cu
, die
, type
);
15880 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15882 /* ICC<14 does not output the required DW_AT_declaration on
15883 incomplete types, but gives them a size of zero. */
15884 TYPE_STUB (type
) = 1;
15887 TYPE_STUB_SUPPORTED (type
) = 1;
15889 if (die_is_declaration (die
, cu
))
15890 TYPE_STUB (type
) = 1;
15891 else if (attr
== NULL
&& die
->child
== NULL
15892 && producer_is_realview (cu
->producer
))
15893 /* RealView does not output the required DW_AT_declaration
15894 on incomplete types. */
15895 TYPE_STUB (type
) = 1;
15897 /* We need to add the type field to the die immediately so we don't
15898 infinitely recurse when dealing with pointers to the structure
15899 type within the structure itself. */
15900 set_die_type (die
, type
, cu
);
15902 /* set_die_type should be already done. */
15903 set_descriptive_type (type
, die
, cu
);
15908 /* A helper for process_structure_scope that handles a single member
15912 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15913 struct field_info
*fi
,
15914 std::vector
<struct symbol
*> *template_args
,
15915 struct dwarf2_cu
*cu
)
15917 if (child_die
->tag
== DW_TAG_member
15918 || child_die
->tag
== DW_TAG_variable
15919 || child_die
->tag
== DW_TAG_variant_part
)
15921 /* NOTE: carlton/2002-11-05: A C++ static data member
15922 should be a DW_TAG_member that is a declaration, but
15923 all versions of G++ as of this writing (so through at
15924 least 3.2.1) incorrectly generate DW_TAG_variable
15925 tags for them instead. */
15926 dwarf2_add_field (fi
, child_die
, cu
);
15928 else if (child_die
->tag
== DW_TAG_subprogram
)
15930 /* Rust doesn't have member functions in the C++ sense.
15931 However, it does emit ordinary functions as children
15932 of a struct DIE. */
15933 if (cu
->language
== language_rust
)
15934 read_func_scope (child_die
, cu
);
15937 /* C++ member function. */
15938 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15941 else if (child_die
->tag
== DW_TAG_inheritance
)
15943 /* C++ base class field. */
15944 dwarf2_add_field (fi
, child_die
, cu
);
15946 else if (type_can_define_types (child_die
))
15947 dwarf2_add_type_defn (fi
, child_die
, cu
);
15948 else if (child_die
->tag
== DW_TAG_template_type_param
15949 || child_die
->tag
== DW_TAG_template_value_param
)
15951 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15954 template_args
->push_back (arg
);
15956 else if (child_die
->tag
== DW_TAG_variant
)
15958 /* In a variant we want to get the discriminant and also add a
15959 field for our sole member child. */
15960 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15962 for (die_info
*variant_child
= child_die
->child
;
15963 variant_child
!= NULL
;
15964 variant_child
= sibling_die (variant_child
))
15966 if (variant_child
->tag
== DW_TAG_member
)
15968 handle_struct_member_die (variant_child
, type
, fi
,
15969 template_args
, cu
);
15970 /* Only handle the one. */
15975 /* We don't handle this but we might as well report it if we see
15977 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15978 complaint (_("DW_AT_discr_list is not supported yet"
15979 " - DIE at %s [in module %s]"),
15980 sect_offset_str (child_die
->sect_off
),
15981 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15983 /* The first field was just added, so we can stash the
15984 discriminant there. */
15985 gdb_assert (!fi
->fields
.empty ());
15987 fi
->fields
.back ().variant
.default_branch
= true;
15989 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15993 /* Finish creating a structure or union type, including filling in
15994 its members and creating a symbol for it. */
15997 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15999 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16000 struct die_info
*child_die
;
16003 type
= get_die_type (die
, cu
);
16005 type
= read_structure_type (die
, cu
);
16007 /* When reading a DW_TAG_variant_part, we need to notice when we
16008 read the discriminant member, so we can record it later in the
16009 discriminant_info. */
16010 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
16011 sect_offset discr_offset
;
16012 bool has_template_parameters
= false;
16014 if (is_variant_part
)
16016 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
16019 /* Maybe it's a univariant form, an extension we support.
16020 In this case arrange not to check the offset. */
16021 is_variant_part
= false;
16023 else if (attr_form_is_ref (discr
))
16025 struct dwarf2_cu
*target_cu
= cu
;
16026 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
16028 discr_offset
= target_die
->sect_off
;
16032 complaint (_("DW_AT_discr does not have DIE reference form"
16033 " - DIE at %s [in module %s]"),
16034 sect_offset_str (die
->sect_off
),
16035 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16036 is_variant_part
= false;
16040 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
16042 struct field_info fi
;
16043 std::vector
<struct symbol
*> template_args
;
16045 child_die
= die
->child
;
16047 while (child_die
&& child_die
->tag
)
16049 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
16051 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
16052 fi
.fields
.back ().variant
.is_discriminant
= true;
16054 child_die
= sibling_die (child_die
);
16057 /* Attach template arguments to type. */
16058 if (!template_args
.empty ())
16060 has_template_parameters
= true;
16061 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16062 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
16063 TYPE_TEMPLATE_ARGUMENTS (type
)
16064 = XOBNEWVEC (&objfile
->objfile_obstack
,
16066 TYPE_N_TEMPLATE_ARGUMENTS (type
));
16067 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
16068 template_args
.data (),
16069 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
16070 * sizeof (struct symbol
*)));
16073 /* Attach fields and member functions to the type. */
16075 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
16076 if (!fi
.fnfieldlists
.empty ())
16078 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
16080 /* Get the type which refers to the base class (possibly this
16081 class itself) which contains the vtable pointer for the current
16082 class from the DW_AT_containing_type attribute. This use of
16083 DW_AT_containing_type is a GNU extension. */
16085 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
16087 struct type
*t
= die_containing_type (die
, cu
);
16089 set_type_vptr_basetype (type
, t
);
16094 /* Our own class provides vtbl ptr. */
16095 for (i
= TYPE_NFIELDS (t
) - 1;
16096 i
>= TYPE_N_BASECLASSES (t
);
16099 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
16101 if (is_vtable_name (fieldname
, cu
))
16103 set_type_vptr_fieldno (type
, i
);
16108 /* Complain if virtual function table field not found. */
16109 if (i
< TYPE_N_BASECLASSES (t
))
16110 complaint (_("virtual function table pointer "
16111 "not found when defining class '%s'"),
16112 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
16116 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16119 else if (cu
->producer
16120 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16122 /* The IBM XLC compiler does not provide direct indication
16123 of the containing type, but the vtable pointer is
16124 always named __vfp. */
16128 for (i
= TYPE_NFIELDS (type
) - 1;
16129 i
>= TYPE_N_BASECLASSES (type
);
16132 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16134 set_type_vptr_fieldno (type
, i
);
16135 set_type_vptr_basetype (type
, type
);
16142 /* Copy fi.typedef_field_list linked list elements content into the
16143 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16144 if (!fi
.typedef_field_list
.empty ())
16146 int count
= fi
.typedef_field_list
.size ();
16148 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16149 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16150 = ((struct decl_field
*)
16152 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16153 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16155 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16156 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16159 /* Copy fi.nested_types_list linked list elements content into the
16160 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16161 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16163 int count
= fi
.nested_types_list
.size ();
16165 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16166 TYPE_NESTED_TYPES_ARRAY (type
)
16167 = ((struct decl_field
*)
16168 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16169 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16171 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16172 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16176 quirk_gcc_member_function_pointer (type
, objfile
);
16177 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16178 cu
->rust_unions
.push_back (type
);
16180 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16181 snapshots) has been known to create a die giving a declaration
16182 for a class that has, as a child, a die giving a definition for a
16183 nested class. So we have to process our children even if the
16184 current die is a declaration. Normally, of course, a declaration
16185 won't have any children at all. */
16187 child_die
= die
->child
;
16189 while (child_die
!= NULL
&& child_die
->tag
)
16191 if (child_die
->tag
== DW_TAG_member
16192 || child_die
->tag
== DW_TAG_variable
16193 || child_die
->tag
== DW_TAG_inheritance
16194 || child_die
->tag
== DW_TAG_template_value_param
16195 || child_die
->tag
== DW_TAG_template_type_param
)
16200 process_die (child_die
, cu
);
16202 child_die
= sibling_die (child_die
);
16205 /* Do not consider external references. According to the DWARF standard,
16206 these DIEs are identified by the fact that they have no byte_size
16207 attribute, and a declaration attribute. */
16208 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16209 || !die_is_declaration (die
, cu
))
16211 struct symbol
*sym
= new_symbol (die
, type
, cu
);
16213 if (has_template_parameters
)
16215 struct symtab
*symtab
;
16216 if (sym
!= nullptr)
16217 symtab
= symbol_symtab (sym
);
16218 else if (cu
->line_header
!= nullptr)
16220 /* Any related symtab will do. */
16222 = cu
->line_header
->file_name_at (file_name_index (1))->symtab
;
16227 complaint (_("could not find suitable "
16228 "symtab for template parameter"
16229 " - DIE at %s [in module %s]"),
16230 sect_offset_str (die
->sect_off
),
16231 objfile_name (objfile
));
16234 if (symtab
!= nullptr)
16236 /* Make sure that the symtab is set on the new symbols.
16237 Even though they don't appear in this symtab directly,
16238 other parts of gdb assume that symbols do, and this is
16239 reasonably true. */
16240 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
16241 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
16247 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16248 update TYPE using some information only available in DIE's children. */
16251 update_enumeration_type_from_children (struct die_info
*die
,
16253 struct dwarf2_cu
*cu
)
16255 struct die_info
*child_die
;
16256 int unsigned_enum
= 1;
16260 auto_obstack obstack
;
16262 for (child_die
= die
->child
;
16263 child_die
!= NULL
&& child_die
->tag
;
16264 child_die
= sibling_die (child_die
))
16266 struct attribute
*attr
;
16268 const gdb_byte
*bytes
;
16269 struct dwarf2_locexpr_baton
*baton
;
16272 if (child_die
->tag
!= DW_TAG_enumerator
)
16275 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16279 name
= dwarf2_name (child_die
, cu
);
16281 name
= "<anonymous enumerator>";
16283 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16284 &value
, &bytes
, &baton
);
16290 else if ((mask
& value
) != 0)
16295 /* If we already know that the enum type is neither unsigned, nor
16296 a flag type, no need to look at the rest of the enumerates. */
16297 if (!unsigned_enum
&& !flag_enum
)
16302 TYPE_UNSIGNED (type
) = 1;
16304 TYPE_FLAG_ENUM (type
) = 1;
16307 /* Given a DW_AT_enumeration_type die, set its type. We do not
16308 complete the type's fields yet, or create any symbols. */
16310 static struct type
*
16311 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16313 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16315 struct attribute
*attr
;
16318 /* If the definition of this type lives in .debug_types, read that type.
16319 Don't follow DW_AT_specification though, that will take us back up
16320 the chain and we want to go down. */
16321 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16324 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16326 /* The type's CU may not be the same as CU.
16327 Ensure TYPE is recorded with CU in die_type_hash. */
16328 return set_die_type (die
, type
, cu
);
16331 type
= alloc_type (objfile
);
16333 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16334 name
= dwarf2_full_name (NULL
, die
, cu
);
16336 TYPE_NAME (type
) = name
;
16338 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16341 struct type
*underlying_type
= die_type (die
, cu
);
16343 TYPE_TARGET_TYPE (type
) = underlying_type
;
16346 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16349 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16353 TYPE_LENGTH (type
) = 0;
16356 maybe_set_alignment (cu
, die
, type
);
16358 /* The enumeration DIE can be incomplete. In Ada, any type can be
16359 declared as private in the package spec, and then defined only
16360 inside the package body. Such types are known as Taft Amendment
16361 Types. When another package uses such a type, an incomplete DIE
16362 may be generated by the compiler. */
16363 if (die_is_declaration (die
, cu
))
16364 TYPE_STUB (type
) = 1;
16366 /* Finish the creation of this type by using the enum's children.
16367 We must call this even when the underlying type has been provided
16368 so that we can determine if we're looking at a "flag" enum. */
16369 update_enumeration_type_from_children (die
, type
, cu
);
16371 /* If this type has an underlying type that is not a stub, then we
16372 may use its attributes. We always use the "unsigned" attribute
16373 in this situation, because ordinarily we guess whether the type
16374 is unsigned -- but the guess can be wrong and the underlying type
16375 can tell us the reality. However, we defer to a local size
16376 attribute if one exists, because this lets the compiler override
16377 the underlying type if needed. */
16378 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16380 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16381 if (TYPE_LENGTH (type
) == 0)
16382 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16383 if (TYPE_RAW_ALIGN (type
) == 0
16384 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16385 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16388 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16390 return set_die_type (die
, type
, cu
);
16393 /* Given a pointer to a die which begins an enumeration, process all
16394 the dies that define the members of the enumeration, and create the
16395 symbol for the enumeration type.
16397 NOTE: We reverse the order of the element list. */
16400 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16402 struct type
*this_type
;
16404 this_type
= get_die_type (die
, cu
);
16405 if (this_type
== NULL
)
16406 this_type
= read_enumeration_type (die
, cu
);
16408 if (die
->child
!= NULL
)
16410 struct die_info
*child_die
;
16411 struct symbol
*sym
;
16412 struct field
*fields
= NULL
;
16413 int num_fields
= 0;
16416 child_die
= die
->child
;
16417 while (child_die
&& child_die
->tag
)
16419 if (child_die
->tag
!= DW_TAG_enumerator
)
16421 process_die (child_die
, cu
);
16425 name
= dwarf2_name (child_die
, cu
);
16428 sym
= new_symbol (child_die
, this_type
, cu
);
16430 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16432 fields
= (struct field
*)
16434 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16435 * sizeof (struct field
));
16438 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16439 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16440 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16441 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16447 child_die
= sibling_die (child_die
);
16452 TYPE_NFIELDS (this_type
) = num_fields
;
16453 TYPE_FIELDS (this_type
) = (struct field
*)
16454 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16455 memcpy (TYPE_FIELDS (this_type
), fields
,
16456 sizeof (struct field
) * num_fields
);
16461 /* If we are reading an enum from a .debug_types unit, and the enum
16462 is a declaration, and the enum is not the signatured type in the
16463 unit, then we do not want to add a symbol for it. Adding a
16464 symbol would in some cases obscure the true definition of the
16465 enum, giving users an incomplete type when the definition is
16466 actually available. Note that we do not want to do this for all
16467 enums which are just declarations, because C++0x allows forward
16468 enum declarations. */
16469 if (cu
->per_cu
->is_debug_types
16470 && die_is_declaration (die
, cu
))
16472 struct signatured_type
*sig_type
;
16474 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16475 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16476 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16480 new_symbol (die
, this_type
, cu
);
16483 /* Extract all information from a DW_TAG_array_type DIE and put it in
16484 the DIE's type field. For now, this only handles one dimensional
16487 static struct type
*
16488 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16490 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16491 struct die_info
*child_die
;
16493 struct type
*element_type
, *range_type
, *index_type
;
16494 struct attribute
*attr
;
16496 struct dynamic_prop
*byte_stride_prop
= NULL
;
16497 unsigned int bit_stride
= 0;
16499 element_type
= die_type (die
, cu
);
16501 /* The die_type call above may have already set the type for this DIE. */
16502 type
= get_die_type (die
, cu
);
16506 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16512 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16513 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
);
16516 complaint (_("unable to read array DW_AT_byte_stride "
16517 " - DIE at %s [in module %s]"),
16518 sect_offset_str (die
->sect_off
),
16519 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16520 /* Ignore this attribute. We will likely not be able to print
16521 arrays of this type correctly, but there is little we can do
16522 to help if we cannot read the attribute's value. */
16523 byte_stride_prop
= NULL
;
16527 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16529 bit_stride
= DW_UNSND (attr
);
16531 /* Irix 6.2 native cc creates array types without children for
16532 arrays with unspecified length. */
16533 if (die
->child
== NULL
)
16535 index_type
= objfile_type (objfile
)->builtin_int
;
16536 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16537 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16538 byte_stride_prop
, bit_stride
);
16539 return set_die_type (die
, type
, cu
);
16542 std::vector
<struct type
*> range_types
;
16543 child_die
= die
->child
;
16544 while (child_die
&& child_die
->tag
)
16546 if (child_die
->tag
== DW_TAG_subrange_type
)
16548 struct type
*child_type
= read_type_die (child_die
, cu
);
16550 if (child_type
!= NULL
)
16552 /* The range type was succesfully read. Save it for the
16553 array type creation. */
16554 range_types
.push_back (child_type
);
16557 child_die
= sibling_die (child_die
);
16560 /* Dwarf2 dimensions are output from left to right, create the
16561 necessary array types in backwards order. */
16563 type
= element_type
;
16565 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16569 while (i
< range_types
.size ())
16570 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16571 byte_stride_prop
, bit_stride
);
16575 size_t ndim
= range_types
.size ();
16577 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16578 byte_stride_prop
, bit_stride
);
16581 /* Understand Dwarf2 support for vector types (like they occur on
16582 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16583 array type. This is not part of the Dwarf2/3 standard yet, but a
16584 custom vendor extension. The main difference between a regular
16585 array and the vector variant is that vectors are passed by value
16587 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16589 make_vector_type (type
);
16591 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16592 implementation may choose to implement triple vectors using this
16594 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16597 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16598 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16600 complaint (_("DW_AT_byte_size for array type smaller "
16601 "than the total size of elements"));
16604 name
= dwarf2_name (die
, cu
);
16606 TYPE_NAME (type
) = name
;
16608 maybe_set_alignment (cu
, die
, type
);
16610 /* Install the type in the die. */
16611 set_die_type (die
, type
, cu
);
16613 /* set_die_type should be already done. */
16614 set_descriptive_type (type
, die
, cu
);
16619 static enum dwarf_array_dim_ordering
16620 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16622 struct attribute
*attr
;
16624 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16627 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16629 /* GNU F77 is a special case, as at 08/2004 array type info is the
16630 opposite order to the dwarf2 specification, but data is still
16631 laid out as per normal fortran.
16633 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16634 version checking. */
16636 if (cu
->language
== language_fortran
16637 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16639 return DW_ORD_row_major
;
16642 switch (cu
->language_defn
->la_array_ordering
)
16644 case array_column_major
:
16645 return DW_ORD_col_major
;
16646 case array_row_major
:
16648 return DW_ORD_row_major
;
16652 /* Extract all information from a DW_TAG_set_type DIE and put it in
16653 the DIE's type field. */
16655 static struct type
*
16656 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16658 struct type
*domain_type
, *set_type
;
16659 struct attribute
*attr
;
16661 domain_type
= die_type (die
, cu
);
16663 /* The die_type call above may have already set the type for this DIE. */
16664 set_type
= get_die_type (die
, cu
);
16668 set_type
= create_set_type (NULL
, domain_type
);
16670 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16672 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16674 maybe_set_alignment (cu
, die
, set_type
);
16676 return set_die_type (die
, set_type
, cu
);
16679 /* A helper for read_common_block that creates a locexpr baton.
16680 SYM is the symbol which we are marking as computed.
16681 COMMON_DIE is the DIE for the common block.
16682 COMMON_LOC is the location expression attribute for the common
16684 MEMBER_LOC is the location expression attribute for the particular
16685 member of the common block that we are processing.
16686 CU is the CU from which the above come. */
16689 mark_common_block_symbol_computed (struct symbol
*sym
,
16690 struct die_info
*common_die
,
16691 struct attribute
*common_loc
,
16692 struct attribute
*member_loc
,
16693 struct dwarf2_cu
*cu
)
16695 struct dwarf2_per_objfile
*dwarf2_per_objfile
16696 = cu
->per_cu
->dwarf2_per_objfile
;
16697 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16698 struct dwarf2_locexpr_baton
*baton
;
16700 unsigned int cu_off
;
16701 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16702 LONGEST offset
= 0;
16704 gdb_assert (common_loc
&& member_loc
);
16705 gdb_assert (attr_form_is_block (common_loc
));
16706 gdb_assert (attr_form_is_block (member_loc
)
16707 || attr_form_is_constant (member_loc
));
16709 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16710 baton
->per_cu
= cu
->per_cu
;
16711 gdb_assert (baton
->per_cu
);
16713 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16715 if (attr_form_is_constant (member_loc
))
16717 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16718 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16721 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16723 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16726 *ptr
++ = DW_OP_call4
;
16727 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16728 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16731 if (attr_form_is_constant (member_loc
))
16733 *ptr
++ = DW_OP_addr
;
16734 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16735 ptr
+= cu
->header
.addr_size
;
16739 /* We have to copy the data here, because DW_OP_call4 will only
16740 use a DW_AT_location attribute. */
16741 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16742 ptr
+= DW_BLOCK (member_loc
)->size
;
16745 *ptr
++ = DW_OP_plus
;
16746 gdb_assert (ptr
- baton
->data
== baton
->size
);
16748 SYMBOL_LOCATION_BATON (sym
) = baton
;
16749 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16752 /* Create appropriate locally-scoped variables for all the
16753 DW_TAG_common_block entries. Also create a struct common_block
16754 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16755 is used to sepate the common blocks name namespace from regular
16759 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16761 struct attribute
*attr
;
16763 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16766 /* Support the .debug_loc offsets. */
16767 if (attr_form_is_block (attr
))
16771 else if (attr_form_is_section_offset (attr
))
16773 dwarf2_complex_location_expr_complaint ();
16778 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16779 "common block member");
16784 if (die
->child
!= NULL
)
16786 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16787 struct die_info
*child_die
;
16788 size_t n_entries
= 0, size
;
16789 struct common_block
*common_block
;
16790 struct symbol
*sym
;
16792 for (child_die
= die
->child
;
16793 child_die
&& child_die
->tag
;
16794 child_die
= sibling_die (child_die
))
16797 size
= (sizeof (struct common_block
)
16798 + (n_entries
- 1) * sizeof (struct symbol
*));
16800 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16802 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16803 common_block
->n_entries
= 0;
16805 for (child_die
= die
->child
;
16806 child_die
&& child_die
->tag
;
16807 child_die
= sibling_die (child_die
))
16809 /* Create the symbol in the DW_TAG_common_block block in the current
16811 sym
= new_symbol (child_die
, NULL
, cu
);
16814 struct attribute
*member_loc
;
16816 common_block
->contents
[common_block
->n_entries
++] = sym
;
16818 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16822 /* GDB has handled this for a long time, but it is
16823 not specified by DWARF. It seems to have been
16824 emitted by gfortran at least as recently as:
16825 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16826 complaint (_("Variable in common block has "
16827 "DW_AT_data_member_location "
16828 "- DIE at %s [in module %s]"),
16829 sect_offset_str (child_die
->sect_off
),
16830 objfile_name (objfile
));
16832 if (attr_form_is_section_offset (member_loc
))
16833 dwarf2_complex_location_expr_complaint ();
16834 else if (attr_form_is_constant (member_loc
)
16835 || attr_form_is_block (member_loc
))
16838 mark_common_block_symbol_computed (sym
, die
, attr
,
16842 dwarf2_complex_location_expr_complaint ();
16847 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16848 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16852 /* Create a type for a C++ namespace. */
16854 static struct type
*
16855 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16857 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16858 const char *previous_prefix
, *name
;
16862 /* For extensions, reuse the type of the original namespace. */
16863 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16865 struct die_info
*ext_die
;
16866 struct dwarf2_cu
*ext_cu
= cu
;
16868 ext_die
= dwarf2_extension (die
, &ext_cu
);
16869 type
= read_type_die (ext_die
, ext_cu
);
16871 /* EXT_CU may not be the same as CU.
16872 Ensure TYPE is recorded with CU in die_type_hash. */
16873 return set_die_type (die
, type
, cu
);
16876 name
= namespace_name (die
, &is_anonymous
, cu
);
16878 /* Now build the name of the current namespace. */
16880 previous_prefix
= determine_prefix (die
, cu
);
16881 if (previous_prefix
[0] != '\0')
16882 name
= typename_concat (&objfile
->objfile_obstack
,
16883 previous_prefix
, name
, 0, cu
);
16885 /* Create the type. */
16886 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16888 return set_die_type (die
, type
, cu
);
16891 /* Read a namespace scope. */
16894 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16896 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16899 /* Add a symbol associated to this if we haven't seen the namespace
16900 before. Also, add a using directive if it's an anonymous
16903 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16907 type
= read_type_die (die
, cu
);
16908 new_symbol (die
, type
, cu
);
16910 namespace_name (die
, &is_anonymous
, cu
);
16913 const char *previous_prefix
= determine_prefix (die
, cu
);
16915 std::vector
<const char *> excludes
;
16916 add_using_directive (using_directives (cu
),
16917 previous_prefix
, TYPE_NAME (type
), NULL
,
16918 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16922 if (die
->child
!= NULL
)
16924 struct die_info
*child_die
= die
->child
;
16926 while (child_die
&& child_die
->tag
)
16928 process_die (child_die
, cu
);
16929 child_die
= sibling_die (child_die
);
16934 /* Read a Fortran module as type. This DIE can be only a declaration used for
16935 imported module. Still we need that type as local Fortran "use ... only"
16936 declaration imports depend on the created type in determine_prefix. */
16938 static struct type
*
16939 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16941 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16942 const char *module_name
;
16945 module_name
= dwarf2_name (die
, cu
);
16947 complaint (_("DW_TAG_module has no name, offset %s"),
16948 sect_offset_str (die
->sect_off
));
16949 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16951 return set_die_type (die
, type
, cu
);
16954 /* Read a Fortran module. */
16957 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16959 struct die_info
*child_die
= die
->child
;
16962 type
= read_type_die (die
, cu
);
16963 new_symbol (die
, type
, cu
);
16965 while (child_die
&& child_die
->tag
)
16967 process_die (child_die
, cu
);
16968 child_die
= sibling_die (child_die
);
16972 /* Return the name of the namespace represented by DIE. Set
16973 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16976 static const char *
16977 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16979 struct die_info
*current_die
;
16980 const char *name
= NULL
;
16982 /* Loop through the extensions until we find a name. */
16984 for (current_die
= die
;
16985 current_die
!= NULL
;
16986 current_die
= dwarf2_extension (die
, &cu
))
16988 /* We don't use dwarf2_name here so that we can detect the absence
16989 of a name -> anonymous namespace. */
16990 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16996 /* Is it an anonymous namespace? */
16998 *is_anonymous
= (name
== NULL
);
17000 name
= CP_ANONYMOUS_NAMESPACE_STR
;
17005 /* Extract all information from a DW_TAG_pointer_type DIE and add to
17006 the user defined type vector. */
17008 static struct type
*
17009 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17011 struct gdbarch
*gdbarch
17012 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
17013 struct comp_unit_head
*cu_header
= &cu
->header
;
17015 struct attribute
*attr_byte_size
;
17016 struct attribute
*attr_address_class
;
17017 int byte_size
, addr_class
;
17018 struct type
*target_type
;
17020 target_type
= die_type (die
, cu
);
17022 /* The die_type call above may have already set the type for this DIE. */
17023 type
= get_die_type (die
, cu
);
17027 type
= lookup_pointer_type (target_type
);
17029 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17030 if (attr_byte_size
)
17031 byte_size
= DW_UNSND (attr_byte_size
);
17033 byte_size
= cu_header
->addr_size
;
17035 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
17036 if (attr_address_class
)
17037 addr_class
= DW_UNSND (attr_address_class
);
17039 addr_class
= DW_ADDR_none
;
17041 ULONGEST alignment
= get_alignment (cu
, die
);
17043 /* If the pointer size, alignment, or address class is different
17044 than the default, create a type variant marked as such and set
17045 the length accordingly. */
17046 if (TYPE_LENGTH (type
) != byte_size
17047 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
17048 && alignment
!= TYPE_RAW_ALIGN (type
))
17049 || addr_class
!= DW_ADDR_none
)
17051 if (gdbarch_address_class_type_flags_p (gdbarch
))
17055 type_flags
= gdbarch_address_class_type_flags
17056 (gdbarch
, byte_size
, addr_class
);
17057 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
17059 type
= make_type_with_address_space (type
, type_flags
);
17061 else if (TYPE_LENGTH (type
) != byte_size
)
17063 complaint (_("invalid pointer size %d"), byte_size
);
17065 else if (TYPE_RAW_ALIGN (type
) != alignment
)
17067 complaint (_("Invalid DW_AT_alignment"
17068 " - DIE at %s [in module %s]"),
17069 sect_offset_str (die
->sect_off
),
17070 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17074 /* Should we also complain about unhandled address classes? */
17078 TYPE_LENGTH (type
) = byte_size
;
17079 set_type_align (type
, alignment
);
17080 return set_die_type (die
, type
, cu
);
17083 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
17084 the user defined type vector. */
17086 static struct type
*
17087 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17090 struct type
*to_type
;
17091 struct type
*domain
;
17093 to_type
= die_type (die
, cu
);
17094 domain
= die_containing_type (die
, cu
);
17096 /* The calls above may have already set the type for this DIE. */
17097 type
= get_die_type (die
, cu
);
17101 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
17102 type
= lookup_methodptr_type (to_type
);
17103 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
17105 struct type
*new_type
17106 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
17108 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
17109 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
17110 TYPE_VARARGS (to_type
));
17111 type
= lookup_methodptr_type (new_type
);
17114 type
= lookup_memberptr_type (to_type
, domain
);
17116 return set_die_type (die
, type
, cu
);
17119 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
17120 the user defined type vector. */
17122 static struct type
*
17123 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17124 enum type_code refcode
)
17126 struct comp_unit_head
*cu_header
= &cu
->header
;
17127 struct type
*type
, *target_type
;
17128 struct attribute
*attr
;
17130 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17132 target_type
= die_type (die
, cu
);
17134 /* The die_type call above may have already set the type for this DIE. */
17135 type
= get_die_type (die
, cu
);
17139 type
= lookup_reference_type (target_type
, refcode
);
17140 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17143 TYPE_LENGTH (type
) = DW_UNSND (attr
);
17147 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17149 maybe_set_alignment (cu
, die
, type
);
17150 return set_die_type (die
, type
, cu
);
17153 /* Add the given cv-qualifiers to the element type of the array. GCC
17154 outputs DWARF type qualifiers that apply to an array, not the
17155 element type. But GDB relies on the array element type to carry
17156 the cv-qualifiers. This mimics section 6.7.3 of the C99
17159 static struct type
*
17160 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17161 struct type
*base_type
, int cnst
, int voltl
)
17163 struct type
*el_type
, *inner_array
;
17165 base_type
= copy_type (base_type
);
17166 inner_array
= base_type
;
17168 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
17170 TYPE_TARGET_TYPE (inner_array
) =
17171 copy_type (TYPE_TARGET_TYPE (inner_array
));
17172 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17175 el_type
= TYPE_TARGET_TYPE (inner_array
);
17176 cnst
|= TYPE_CONST (el_type
);
17177 voltl
|= TYPE_VOLATILE (el_type
);
17178 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17180 return set_die_type (die
, base_type
, cu
);
17183 static struct type
*
17184 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17186 struct type
*base_type
, *cv_type
;
17188 base_type
= die_type (die
, cu
);
17190 /* The die_type call above may have already set the type for this DIE. */
17191 cv_type
= get_die_type (die
, cu
);
17195 /* In case the const qualifier is applied to an array type, the element type
17196 is so qualified, not the array type (section 6.7.3 of C99). */
17197 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17198 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17200 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17201 return set_die_type (die
, cv_type
, cu
);
17204 static struct type
*
17205 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17207 struct type
*base_type
, *cv_type
;
17209 base_type
= die_type (die
, cu
);
17211 /* The die_type call above may have already set the type for this DIE. */
17212 cv_type
= get_die_type (die
, cu
);
17216 /* In case the volatile qualifier is applied to an array type, the
17217 element type is so qualified, not the array type (section 6.7.3
17219 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17220 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17222 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17223 return set_die_type (die
, cv_type
, cu
);
17226 /* Handle DW_TAG_restrict_type. */
17228 static struct type
*
17229 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17231 struct type
*base_type
, *cv_type
;
17233 base_type
= die_type (die
, cu
);
17235 /* The die_type call above may have already set the type for this DIE. */
17236 cv_type
= get_die_type (die
, cu
);
17240 cv_type
= make_restrict_type (base_type
);
17241 return set_die_type (die
, cv_type
, cu
);
17244 /* Handle DW_TAG_atomic_type. */
17246 static struct type
*
17247 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17249 struct type
*base_type
, *cv_type
;
17251 base_type
= die_type (die
, cu
);
17253 /* The die_type call above may have already set the type for this DIE. */
17254 cv_type
= get_die_type (die
, cu
);
17258 cv_type
= make_atomic_type (base_type
);
17259 return set_die_type (die
, cv_type
, cu
);
17262 /* Extract all information from a DW_TAG_string_type DIE and add to
17263 the user defined type vector. It isn't really a user defined type,
17264 but it behaves like one, with other DIE's using an AT_user_def_type
17265 attribute to reference it. */
17267 static struct type
*
17268 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17270 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17271 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17272 struct type
*type
, *range_type
, *index_type
, *char_type
;
17273 struct attribute
*attr
;
17274 unsigned int length
;
17276 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17279 length
= DW_UNSND (attr
);
17283 /* Check for the DW_AT_byte_size attribute. */
17284 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17287 length
= DW_UNSND (attr
);
17295 index_type
= objfile_type (objfile
)->builtin_int
;
17296 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17297 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17298 type
= create_string_type (NULL
, char_type
, range_type
);
17300 return set_die_type (die
, type
, cu
);
17303 /* Assuming that DIE corresponds to a function, returns nonzero
17304 if the function is prototyped. */
17307 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17309 struct attribute
*attr
;
17311 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17312 if (attr
&& (DW_UNSND (attr
) != 0))
17315 /* The DWARF standard implies that the DW_AT_prototyped attribute
17316 is only meaninful for C, but the concept also extends to other
17317 languages that allow unprototyped functions (Eg: Objective C).
17318 For all other languages, assume that functions are always
17320 if (cu
->language
!= language_c
17321 && cu
->language
!= language_objc
17322 && cu
->language
!= language_opencl
)
17325 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17326 prototyped and unprototyped functions; default to prototyped,
17327 since that is more common in modern code (and RealView warns
17328 about unprototyped functions). */
17329 if (producer_is_realview (cu
->producer
))
17335 /* Handle DIES due to C code like:
17339 int (*funcp)(int a, long l);
17343 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17345 static struct type
*
17346 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17348 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17349 struct type
*type
; /* Type that this function returns. */
17350 struct type
*ftype
; /* Function that returns above type. */
17351 struct attribute
*attr
;
17353 type
= die_type (die
, cu
);
17355 /* The die_type call above may have already set the type for this DIE. */
17356 ftype
= get_die_type (die
, cu
);
17360 ftype
= lookup_function_type (type
);
17362 if (prototyped_function_p (die
, cu
))
17363 TYPE_PROTOTYPED (ftype
) = 1;
17365 /* Store the calling convention in the type if it's available in
17366 the subroutine die. Otherwise set the calling convention to
17367 the default value DW_CC_normal. */
17368 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17370 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17371 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17372 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17374 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17376 /* Record whether the function returns normally to its caller or not
17377 if the DWARF producer set that information. */
17378 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17379 if (attr
&& (DW_UNSND (attr
) != 0))
17380 TYPE_NO_RETURN (ftype
) = 1;
17382 /* We need to add the subroutine type to the die immediately so
17383 we don't infinitely recurse when dealing with parameters
17384 declared as the same subroutine type. */
17385 set_die_type (die
, ftype
, cu
);
17387 if (die
->child
!= NULL
)
17389 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17390 struct die_info
*child_die
;
17391 int nparams
, iparams
;
17393 /* Count the number of parameters.
17394 FIXME: GDB currently ignores vararg functions, but knows about
17395 vararg member functions. */
17397 child_die
= die
->child
;
17398 while (child_die
&& child_die
->tag
)
17400 if (child_die
->tag
== DW_TAG_formal_parameter
)
17402 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17403 TYPE_VARARGS (ftype
) = 1;
17404 child_die
= sibling_die (child_die
);
17407 /* Allocate storage for parameters and fill them in. */
17408 TYPE_NFIELDS (ftype
) = nparams
;
17409 TYPE_FIELDS (ftype
) = (struct field
*)
17410 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17412 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17413 even if we error out during the parameters reading below. */
17414 for (iparams
= 0; iparams
< nparams
; iparams
++)
17415 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17418 child_die
= die
->child
;
17419 while (child_die
&& child_die
->tag
)
17421 if (child_die
->tag
== DW_TAG_formal_parameter
)
17423 struct type
*arg_type
;
17425 /* DWARF version 2 has no clean way to discern C++
17426 static and non-static member functions. G++ helps
17427 GDB by marking the first parameter for non-static
17428 member functions (which is the this pointer) as
17429 artificial. We pass this information to
17430 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17432 DWARF version 3 added DW_AT_object_pointer, which GCC
17433 4.5 does not yet generate. */
17434 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17436 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17438 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17439 arg_type
= die_type (child_die
, cu
);
17441 /* RealView does not mark THIS as const, which the testsuite
17442 expects. GCC marks THIS as const in method definitions,
17443 but not in the class specifications (GCC PR 43053). */
17444 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17445 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17448 struct dwarf2_cu
*arg_cu
= cu
;
17449 const char *name
= dwarf2_name (child_die
, cu
);
17451 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17454 /* If the compiler emits this, use it. */
17455 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17458 else if (name
&& strcmp (name
, "this") == 0)
17459 /* Function definitions will have the argument names. */
17461 else if (name
== NULL
&& iparams
== 0)
17462 /* Declarations may not have the names, so like
17463 elsewhere in GDB, assume an artificial first
17464 argument is "this". */
17468 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17472 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17475 child_die
= sibling_die (child_die
);
17482 static struct type
*
17483 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17485 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17486 const char *name
= NULL
;
17487 struct type
*this_type
, *target_type
;
17489 name
= dwarf2_full_name (NULL
, die
, cu
);
17490 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17491 TYPE_TARGET_STUB (this_type
) = 1;
17492 set_die_type (die
, this_type
, cu
);
17493 target_type
= die_type (die
, cu
);
17494 if (target_type
!= this_type
)
17495 TYPE_TARGET_TYPE (this_type
) = target_type
;
17498 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17499 spec and cause infinite loops in GDB. */
17500 complaint (_("Self-referential DW_TAG_typedef "
17501 "- DIE at %s [in module %s]"),
17502 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17503 TYPE_TARGET_TYPE (this_type
) = NULL
;
17508 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17509 (which may be different from NAME) to the architecture back-end to allow
17510 it to guess the correct format if necessary. */
17512 static struct type
*
17513 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17514 const char *name_hint
)
17516 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17517 const struct floatformat
**format
;
17520 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17522 type
= init_float_type (objfile
, bits
, name
, format
);
17524 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17529 /* Allocate an integer type of size BITS and name NAME. */
17531 static struct type
*
17532 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17533 int bits
, int unsigned_p
, const char *name
)
17537 /* Versions of Intel's C Compiler generate an integer type called "void"
17538 instead of using DW_TAG_unspecified_type. This has been seen on
17539 at least versions 14, 17, and 18. */
17540 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17541 && strcmp (name
, "void") == 0)
17542 type
= objfile_type (objfile
)->builtin_void
;
17544 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17549 /* Initialise and return a floating point type of size BITS suitable for
17550 use as a component of a complex number. The NAME_HINT is passed through
17551 when initialising the floating point type and is the name of the complex
17554 As DWARF doesn't currently provide an explicit name for the components
17555 of a complex number, but it can be helpful to have these components
17556 named, we try to select a suitable name based on the size of the
17558 static struct type
*
17559 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17560 struct objfile
*objfile
,
17561 int bits
, const char *name_hint
)
17563 gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17564 struct type
*tt
= nullptr;
17566 /* Try to find a suitable floating point builtin type of size BITS.
17567 We're going to use the name of this type as the name for the complex
17568 target type that we are about to create. */
17569 switch (cu
->language
)
17571 case language_fortran
:
17575 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17578 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17580 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17582 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17590 tt
= builtin_type (gdbarch
)->builtin_float
;
17593 tt
= builtin_type (gdbarch
)->builtin_double
;
17595 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17597 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17603 /* If the type we found doesn't match the size we were looking for, then
17604 pretend we didn't find a type at all, the complex target type we
17605 create will then be nameless. */
17606 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17609 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
17610 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
);
17613 /* Find a representation of a given base type and install
17614 it in the TYPE field of the die. */
17616 static struct type
*
17617 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17619 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17621 struct attribute
*attr
;
17622 int encoding
= 0, bits
= 0;
17625 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17628 encoding
= DW_UNSND (attr
);
17630 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17633 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17635 name
= dwarf2_name (die
, cu
);
17638 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17643 case DW_ATE_address
:
17644 /* Turn DW_ATE_address into a void * pointer. */
17645 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17646 type
= init_pointer_type (objfile
, bits
, name
, type
);
17648 case DW_ATE_boolean
:
17649 type
= init_boolean_type (objfile
, bits
, 1, name
);
17651 case DW_ATE_complex_float
:
17652 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
);
17653 type
= init_complex_type (objfile
, name
, type
);
17655 case DW_ATE_decimal_float
:
17656 type
= init_decfloat_type (objfile
, bits
, name
);
17659 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17661 case DW_ATE_signed
:
17662 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17664 case DW_ATE_unsigned
:
17665 if (cu
->language
== language_fortran
17667 && startswith (name
, "character("))
17668 type
= init_character_type (objfile
, bits
, 1, name
);
17670 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17672 case DW_ATE_signed_char
:
17673 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17674 || cu
->language
== language_pascal
17675 || cu
->language
== language_fortran
)
17676 type
= init_character_type (objfile
, bits
, 0, name
);
17678 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17680 case DW_ATE_unsigned_char
:
17681 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17682 || cu
->language
== language_pascal
17683 || cu
->language
== language_fortran
17684 || cu
->language
== language_rust
)
17685 type
= init_character_type (objfile
, bits
, 1, name
);
17687 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17691 gdbarch
*arch
= get_objfile_arch (objfile
);
17694 type
= builtin_type (arch
)->builtin_char16
;
17695 else if (bits
== 32)
17696 type
= builtin_type (arch
)->builtin_char32
;
17699 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17701 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17703 return set_die_type (die
, type
, cu
);
17708 complaint (_("unsupported DW_AT_encoding: '%s'"),
17709 dwarf_type_encoding_name (encoding
));
17710 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17714 if (name
&& strcmp (name
, "char") == 0)
17715 TYPE_NOSIGN (type
) = 1;
17717 maybe_set_alignment (cu
, die
, type
);
17719 return set_die_type (die
, type
, cu
);
17722 /* Parse dwarf attribute if it's a block, reference or constant and put the
17723 resulting value of the attribute into struct bound_prop.
17724 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17727 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17728 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
17730 struct dwarf2_property_baton
*baton
;
17731 struct obstack
*obstack
17732 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17734 if (attr
== NULL
|| prop
== NULL
)
17737 if (attr_form_is_block (attr
))
17739 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17740 baton
->referenced_type
= NULL
;
17741 baton
->locexpr
.per_cu
= cu
->per_cu
;
17742 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17743 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17744 prop
->data
.baton
= baton
;
17745 prop
->kind
= PROP_LOCEXPR
;
17746 gdb_assert (prop
->data
.baton
!= NULL
);
17748 else if (attr_form_is_ref (attr
))
17750 struct dwarf2_cu
*target_cu
= cu
;
17751 struct die_info
*target_die
;
17752 struct attribute
*target_attr
;
17754 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17755 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17756 if (target_attr
== NULL
)
17757 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17759 if (target_attr
== NULL
)
17762 switch (target_attr
->name
)
17764 case DW_AT_location
:
17765 if (attr_form_is_section_offset (target_attr
))
17767 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17768 baton
->referenced_type
= die_type (target_die
, target_cu
);
17769 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17770 prop
->data
.baton
= baton
;
17771 prop
->kind
= PROP_LOCLIST
;
17772 gdb_assert (prop
->data
.baton
!= NULL
);
17774 else if (attr_form_is_block (target_attr
))
17776 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17777 baton
->referenced_type
= die_type (target_die
, target_cu
);
17778 baton
->locexpr
.per_cu
= cu
->per_cu
;
17779 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17780 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17781 prop
->data
.baton
= baton
;
17782 prop
->kind
= PROP_LOCEXPR
;
17783 gdb_assert (prop
->data
.baton
!= NULL
);
17787 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17788 "dynamic property");
17792 case DW_AT_data_member_location
:
17796 if (!handle_data_member_location (target_die
, target_cu
,
17800 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17801 baton
->referenced_type
= read_type_die (target_die
->parent
,
17803 baton
->offset_info
.offset
= offset
;
17804 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17805 prop
->data
.baton
= baton
;
17806 prop
->kind
= PROP_ADDR_OFFSET
;
17811 else if (attr_form_is_constant (attr
))
17813 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17814 prop
->kind
= PROP_CONST
;
17818 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17819 dwarf2_name (die
, cu
));
17826 /* Read the given DW_AT_subrange DIE. */
17828 static struct type
*
17829 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17831 struct type
*base_type
, *orig_base_type
;
17832 struct type
*range_type
;
17833 struct attribute
*attr
;
17834 struct dynamic_prop low
, high
;
17835 int low_default_is_valid
;
17836 int high_bound_is_count
= 0;
17838 ULONGEST negative_mask
;
17840 orig_base_type
= die_type (die
, cu
);
17841 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17842 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17843 creating the range type, but we use the result of check_typedef
17844 when examining properties of the type. */
17845 base_type
= check_typedef (orig_base_type
);
17847 /* The die_type call above may have already set the type for this DIE. */
17848 range_type
= get_die_type (die
, cu
);
17852 low
.kind
= PROP_CONST
;
17853 high
.kind
= PROP_CONST
;
17854 high
.data
.const_val
= 0;
17856 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17857 omitting DW_AT_lower_bound. */
17858 switch (cu
->language
)
17861 case language_cplus
:
17862 low
.data
.const_val
= 0;
17863 low_default_is_valid
= 1;
17865 case language_fortran
:
17866 low
.data
.const_val
= 1;
17867 low_default_is_valid
= 1;
17870 case language_objc
:
17871 case language_rust
:
17872 low
.data
.const_val
= 0;
17873 low_default_is_valid
= (cu
->header
.version
>= 4);
17877 case language_pascal
:
17878 low
.data
.const_val
= 1;
17879 low_default_is_valid
= (cu
->header
.version
>= 4);
17882 low
.data
.const_val
= 0;
17883 low_default_is_valid
= 0;
17887 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17889 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
17890 else if (!low_default_is_valid
)
17891 complaint (_("Missing DW_AT_lower_bound "
17892 "- DIE at %s [in module %s]"),
17893 sect_offset_str (die
->sect_off
),
17894 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17896 struct attribute
*attr_ub
, *attr_count
;
17897 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17898 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17900 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17901 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17903 /* If bounds are constant do the final calculation here. */
17904 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17905 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17907 high_bound_is_count
= 1;
17911 if (attr_ub
!= NULL
)
17912 complaint (_("Unresolved DW_AT_upper_bound "
17913 "- DIE at %s [in module %s]"),
17914 sect_offset_str (die
->sect_off
),
17915 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17916 if (attr_count
!= NULL
)
17917 complaint (_("Unresolved DW_AT_count "
17918 "- DIE at %s [in module %s]"),
17919 sect_offset_str (die
->sect_off
),
17920 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17925 /* Dwarf-2 specifications explicitly allows to create subrange types
17926 without specifying a base type.
17927 In that case, the base type must be set to the type of
17928 the lower bound, upper bound or count, in that order, if any of these
17929 three attributes references an object that has a type.
17930 If no base type is found, the Dwarf-2 specifications say that
17931 a signed integer type of size equal to the size of an address should
17933 For the following C code: `extern char gdb_int [];'
17934 GCC produces an empty range DIE.
17935 FIXME: muller/2010-05-28: Possible references to object for low bound,
17936 high bound or count are not yet handled by this code. */
17937 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
17939 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17940 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17941 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
17942 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
17944 /* Test "int", "long int", and "long long int" objfile types,
17945 and select the first one having a size above or equal to the
17946 architecture address size. */
17947 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17948 base_type
= int_type
;
17951 int_type
= objfile_type (objfile
)->builtin_long
;
17952 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17953 base_type
= int_type
;
17956 int_type
= objfile_type (objfile
)->builtin_long_long
;
17957 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17958 base_type
= int_type
;
17963 /* Normally, the DWARF producers are expected to use a signed
17964 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17965 But this is unfortunately not always the case, as witnessed
17966 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17967 is used instead. To work around that ambiguity, we treat
17968 the bounds as signed, and thus sign-extend their values, when
17969 the base type is signed. */
17971 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17972 if (low
.kind
== PROP_CONST
17973 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17974 low
.data
.const_val
|= negative_mask
;
17975 if (high
.kind
== PROP_CONST
17976 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17977 high
.data
.const_val
|= negative_mask
;
17979 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17981 if (high_bound_is_count
)
17982 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17984 /* Ada expects an empty array on no boundary attributes. */
17985 if (attr
== NULL
&& cu
->language
!= language_ada
)
17986 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17988 name
= dwarf2_name (die
, cu
);
17990 TYPE_NAME (range_type
) = name
;
17992 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17994 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17996 maybe_set_alignment (cu
, die
, range_type
);
17998 set_die_type (die
, range_type
, cu
);
18000 /* set_die_type should be already done. */
18001 set_descriptive_type (range_type
, die
, cu
);
18006 static struct type
*
18007 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18011 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
18013 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
18015 /* In Ada, an unspecified type is typically used when the description
18016 of the type is defered to a different unit. When encountering
18017 such a type, we treat it as a stub, and try to resolve it later on,
18019 if (cu
->language
== language_ada
)
18020 TYPE_STUB (type
) = 1;
18022 return set_die_type (die
, type
, cu
);
18025 /* Read a single die and all its descendents. Set the die's sibling
18026 field to NULL; set other fields in the die correctly, and set all
18027 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
18028 location of the info_ptr after reading all of those dies. PARENT
18029 is the parent of the die in question. */
18031 static struct die_info
*
18032 read_die_and_children (const struct die_reader_specs
*reader
,
18033 const gdb_byte
*info_ptr
,
18034 const gdb_byte
**new_info_ptr
,
18035 struct die_info
*parent
)
18037 struct die_info
*die
;
18038 const gdb_byte
*cur_ptr
;
18041 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
18044 *new_info_ptr
= cur_ptr
;
18047 store_in_ref_table (die
, reader
->cu
);
18050 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
18054 *new_info_ptr
= cur_ptr
;
18057 die
->sibling
= NULL
;
18058 die
->parent
= parent
;
18062 /* Read a die, all of its descendents, and all of its siblings; set
18063 all of the fields of all of the dies correctly. Arguments are as
18064 in read_die_and_children. */
18066 static struct die_info
*
18067 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
18068 const gdb_byte
*info_ptr
,
18069 const gdb_byte
**new_info_ptr
,
18070 struct die_info
*parent
)
18072 struct die_info
*first_die
, *last_sibling
;
18073 const gdb_byte
*cur_ptr
;
18075 cur_ptr
= info_ptr
;
18076 first_die
= last_sibling
= NULL
;
18080 struct die_info
*die
18081 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
18085 *new_info_ptr
= cur_ptr
;
18092 last_sibling
->sibling
= die
;
18094 last_sibling
= die
;
18098 /* Read a die, all of its descendents, and all of its siblings; set
18099 all of the fields of all of the dies correctly. Arguments are as
18100 in read_die_and_children.
18101 This the main entry point for reading a DIE and all its children. */
18103 static struct die_info
*
18104 read_die_and_siblings (const struct die_reader_specs
*reader
,
18105 const gdb_byte
*info_ptr
,
18106 const gdb_byte
**new_info_ptr
,
18107 struct die_info
*parent
)
18109 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
18110 new_info_ptr
, parent
);
18112 if (dwarf_die_debug
)
18114 fprintf_unfiltered (gdb_stdlog
,
18115 "Read die from %s@0x%x of %s:\n",
18116 get_section_name (reader
->die_section
),
18117 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18118 bfd_get_filename (reader
->abfd
));
18119 dump_die (die
, dwarf_die_debug
);
18125 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
18127 The caller is responsible for filling in the extra attributes
18128 and updating (*DIEP)->num_attrs.
18129 Set DIEP to point to a newly allocated die with its information,
18130 except for its child, sibling, and parent fields.
18131 Set HAS_CHILDREN to tell whether the die has children or not. */
18133 static const gdb_byte
*
18134 read_full_die_1 (const struct die_reader_specs
*reader
,
18135 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18136 int *has_children
, int num_extra_attrs
)
18138 unsigned int abbrev_number
, bytes_read
, i
;
18139 struct abbrev_info
*abbrev
;
18140 struct die_info
*die
;
18141 struct dwarf2_cu
*cu
= reader
->cu
;
18142 bfd
*abfd
= reader
->abfd
;
18144 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
18145 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18146 info_ptr
+= bytes_read
;
18147 if (!abbrev_number
)
18154 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
18156 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
18158 bfd_get_filename (abfd
));
18160 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
18161 die
->sect_off
= sect_off
;
18162 die
->tag
= abbrev
->tag
;
18163 die
->abbrev
= abbrev_number
;
18165 /* Make the result usable.
18166 The caller needs to update num_attrs after adding the extra
18168 die
->num_attrs
= abbrev
->num_attrs
;
18170 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18171 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
18175 *has_children
= abbrev
->has_children
;
18179 /* Read a die and all its attributes.
18180 Set DIEP to point to a newly allocated die with its information,
18181 except for its child, sibling, and parent fields.
18182 Set HAS_CHILDREN to tell whether the die has children or not. */
18184 static const gdb_byte
*
18185 read_full_die (const struct die_reader_specs
*reader
,
18186 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18189 const gdb_byte
*result
;
18191 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
18193 if (dwarf_die_debug
)
18195 fprintf_unfiltered (gdb_stdlog
,
18196 "Read die from %s@0x%x of %s:\n",
18197 get_section_name (reader
->die_section
),
18198 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18199 bfd_get_filename (reader
->abfd
));
18200 dump_die (*diep
, dwarf_die_debug
);
18206 /* Abbreviation tables.
18208 In DWARF version 2, the description of the debugging information is
18209 stored in a separate .debug_abbrev section. Before we read any
18210 dies from a section we read in all abbreviations and install them
18211 in a hash table. */
18213 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
18215 struct abbrev_info
*
18216 abbrev_table::alloc_abbrev ()
18218 struct abbrev_info
*abbrev
;
18220 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
18221 memset (abbrev
, 0, sizeof (struct abbrev_info
));
18226 /* Add an abbreviation to the table. */
18229 abbrev_table::add_abbrev (unsigned int abbrev_number
,
18230 struct abbrev_info
*abbrev
)
18232 unsigned int hash_number
;
18234 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18235 abbrev
->next
= m_abbrevs
[hash_number
];
18236 m_abbrevs
[hash_number
] = abbrev
;
18239 /* Look up an abbrev in the table.
18240 Returns NULL if the abbrev is not found. */
18242 struct abbrev_info
*
18243 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
18245 unsigned int hash_number
;
18246 struct abbrev_info
*abbrev
;
18248 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18249 abbrev
= m_abbrevs
[hash_number
];
18253 if (abbrev
->number
== abbrev_number
)
18255 abbrev
= abbrev
->next
;
18260 /* Read in an abbrev table. */
18262 static abbrev_table_up
18263 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18264 struct dwarf2_section_info
*section
,
18265 sect_offset sect_off
)
18267 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18268 bfd
*abfd
= get_section_bfd_owner (section
);
18269 const gdb_byte
*abbrev_ptr
;
18270 struct abbrev_info
*cur_abbrev
;
18271 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
18272 unsigned int abbrev_form
;
18273 struct attr_abbrev
*cur_attrs
;
18274 unsigned int allocated_attrs
;
18276 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
18278 dwarf2_read_section (objfile
, section
);
18279 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
18280 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18281 abbrev_ptr
+= bytes_read
;
18283 allocated_attrs
= ATTR_ALLOC_CHUNK
;
18284 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
18286 /* Loop until we reach an abbrev number of 0. */
18287 while (abbrev_number
)
18289 cur_abbrev
= abbrev_table
->alloc_abbrev ();
18291 /* read in abbrev header */
18292 cur_abbrev
->number
= abbrev_number
;
18294 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18295 abbrev_ptr
+= bytes_read
;
18296 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18299 /* now read in declarations */
18302 LONGEST implicit_const
;
18304 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18305 abbrev_ptr
+= bytes_read
;
18306 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18307 abbrev_ptr
+= bytes_read
;
18308 if (abbrev_form
== DW_FORM_implicit_const
)
18310 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18312 abbrev_ptr
+= bytes_read
;
18316 /* Initialize it due to a false compiler warning. */
18317 implicit_const
= -1;
18320 if (abbrev_name
== 0)
18323 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18325 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18327 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18330 cur_attrs
[cur_abbrev
->num_attrs
].name
18331 = (enum dwarf_attribute
) abbrev_name
;
18332 cur_attrs
[cur_abbrev
->num_attrs
].form
18333 = (enum dwarf_form
) abbrev_form
;
18334 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18335 ++cur_abbrev
->num_attrs
;
18338 cur_abbrev
->attrs
=
18339 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18340 cur_abbrev
->num_attrs
);
18341 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18342 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18344 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18346 /* Get next abbreviation.
18347 Under Irix6 the abbreviations for a compilation unit are not
18348 always properly terminated with an abbrev number of 0.
18349 Exit loop if we encounter an abbreviation which we have
18350 already read (which means we are about to read the abbreviations
18351 for the next compile unit) or if the end of the abbreviation
18352 table is reached. */
18353 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18355 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18356 abbrev_ptr
+= bytes_read
;
18357 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18362 return abbrev_table
;
18365 /* Returns nonzero if TAG represents a type that we might generate a partial
18369 is_type_tag_for_partial (int tag
)
18374 /* Some types that would be reasonable to generate partial symbols for,
18375 that we don't at present. */
18376 case DW_TAG_array_type
:
18377 case DW_TAG_file_type
:
18378 case DW_TAG_ptr_to_member_type
:
18379 case DW_TAG_set_type
:
18380 case DW_TAG_string_type
:
18381 case DW_TAG_subroutine_type
:
18383 case DW_TAG_base_type
:
18384 case DW_TAG_class_type
:
18385 case DW_TAG_interface_type
:
18386 case DW_TAG_enumeration_type
:
18387 case DW_TAG_structure_type
:
18388 case DW_TAG_subrange_type
:
18389 case DW_TAG_typedef
:
18390 case DW_TAG_union_type
:
18397 /* Load all DIEs that are interesting for partial symbols into memory. */
18399 static struct partial_die_info
*
18400 load_partial_dies (const struct die_reader_specs
*reader
,
18401 const gdb_byte
*info_ptr
, int building_psymtab
)
18403 struct dwarf2_cu
*cu
= reader
->cu
;
18404 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18405 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18406 unsigned int bytes_read
;
18407 unsigned int load_all
= 0;
18408 int nesting_level
= 1;
18413 gdb_assert (cu
->per_cu
!= NULL
);
18414 if (cu
->per_cu
->load_all_dies
)
18418 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18422 &cu
->comp_unit_obstack
,
18423 hashtab_obstack_allocate
,
18424 dummy_obstack_deallocate
);
18428 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18430 /* A NULL abbrev means the end of a series of children. */
18431 if (abbrev
== NULL
)
18433 if (--nesting_level
== 0)
18436 info_ptr
+= bytes_read
;
18437 last_die
= parent_die
;
18438 parent_die
= parent_die
->die_parent
;
18442 /* Check for template arguments. We never save these; if
18443 they're seen, we just mark the parent, and go on our way. */
18444 if (parent_die
!= NULL
18445 && cu
->language
== language_cplus
18446 && (abbrev
->tag
== DW_TAG_template_type_param
18447 || abbrev
->tag
== DW_TAG_template_value_param
))
18449 parent_die
->has_template_arguments
= 1;
18453 /* We don't need a partial DIE for the template argument. */
18454 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18459 /* We only recurse into c++ subprograms looking for template arguments.
18460 Skip their other children. */
18462 && cu
->language
== language_cplus
18463 && parent_die
!= NULL
18464 && parent_die
->tag
== DW_TAG_subprogram
)
18466 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18470 /* Check whether this DIE is interesting enough to save. Normally
18471 we would not be interested in members here, but there may be
18472 later variables referencing them via DW_AT_specification (for
18473 static members). */
18475 && !is_type_tag_for_partial (abbrev
->tag
)
18476 && abbrev
->tag
!= DW_TAG_constant
18477 && abbrev
->tag
!= DW_TAG_enumerator
18478 && abbrev
->tag
!= DW_TAG_subprogram
18479 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18480 && abbrev
->tag
!= DW_TAG_lexical_block
18481 && abbrev
->tag
!= DW_TAG_variable
18482 && abbrev
->tag
!= DW_TAG_namespace
18483 && abbrev
->tag
!= DW_TAG_module
18484 && abbrev
->tag
!= DW_TAG_member
18485 && abbrev
->tag
!= DW_TAG_imported_unit
18486 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18488 /* Otherwise we skip to the next sibling, if any. */
18489 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18493 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18496 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18498 /* This two-pass algorithm for processing partial symbols has a
18499 high cost in cache pressure. Thus, handle some simple cases
18500 here which cover the majority of C partial symbols. DIEs
18501 which neither have specification tags in them, nor could have
18502 specification tags elsewhere pointing at them, can simply be
18503 processed and discarded.
18505 This segment is also optional; scan_partial_symbols and
18506 add_partial_symbol will handle these DIEs if we chain
18507 them in normally. When compilers which do not emit large
18508 quantities of duplicate debug information are more common,
18509 this code can probably be removed. */
18511 /* Any complete simple types at the top level (pretty much all
18512 of them, for a language without namespaces), can be processed
18514 if (parent_die
== NULL
18515 && pdi
.has_specification
== 0
18516 && pdi
.is_declaration
== 0
18517 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18518 || pdi
.tag
== DW_TAG_base_type
18519 || pdi
.tag
== DW_TAG_subrange_type
))
18521 if (building_psymtab
&& pdi
.name
!= NULL
)
18522 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18523 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18524 psymbol_placement::STATIC
,
18525 0, cu
->language
, objfile
);
18526 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18530 /* The exception for DW_TAG_typedef with has_children above is
18531 a workaround of GCC PR debug/47510. In the case of this complaint
18532 type_name_or_error will error on such types later.
18534 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18535 it could not find the child DIEs referenced later, this is checked
18536 above. In correct DWARF DW_TAG_typedef should have no children. */
18538 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18539 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18540 "- DIE at %s [in module %s]"),
18541 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18543 /* If we're at the second level, and we're an enumerator, and
18544 our parent has no specification (meaning possibly lives in a
18545 namespace elsewhere), then we can add the partial symbol now
18546 instead of queueing it. */
18547 if (pdi
.tag
== DW_TAG_enumerator
18548 && parent_die
!= NULL
18549 && parent_die
->die_parent
== NULL
18550 && parent_die
->tag
== DW_TAG_enumeration_type
18551 && parent_die
->has_specification
== 0)
18553 if (pdi
.name
== NULL
)
18554 complaint (_("malformed enumerator DIE ignored"));
18555 else if (building_psymtab
)
18556 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18557 VAR_DOMAIN
, LOC_CONST
, -1,
18558 cu
->language
== language_cplus
18559 ? psymbol_placement::GLOBAL
18560 : psymbol_placement::STATIC
,
18561 0, cu
->language
, objfile
);
18563 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18567 struct partial_die_info
*part_die
18568 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18570 /* We'll save this DIE so link it in. */
18571 part_die
->die_parent
= parent_die
;
18572 part_die
->die_sibling
= NULL
;
18573 part_die
->die_child
= NULL
;
18575 if (last_die
&& last_die
== parent_die
)
18576 last_die
->die_child
= part_die
;
18578 last_die
->die_sibling
= part_die
;
18580 last_die
= part_die
;
18582 if (first_die
== NULL
)
18583 first_die
= part_die
;
18585 /* Maybe add the DIE to the hash table. Not all DIEs that we
18586 find interesting need to be in the hash table, because we
18587 also have the parent/sibling/child chains; only those that we
18588 might refer to by offset later during partial symbol reading.
18590 For now this means things that might have be the target of a
18591 DW_AT_specification, DW_AT_abstract_origin, or
18592 DW_AT_extension. DW_AT_extension will refer only to
18593 namespaces; DW_AT_abstract_origin refers to functions (and
18594 many things under the function DIE, but we do not recurse
18595 into function DIEs during partial symbol reading) and
18596 possibly variables as well; DW_AT_specification refers to
18597 declarations. Declarations ought to have the DW_AT_declaration
18598 flag. It happens that GCC forgets to put it in sometimes, but
18599 only for functions, not for types.
18601 Adding more things than necessary to the hash table is harmless
18602 except for the performance cost. Adding too few will result in
18603 wasted time in find_partial_die, when we reread the compilation
18604 unit with load_all_dies set. */
18607 || abbrev
->tag
== DW_TAG_constant
18608 || abbrev
->tag
== DW_TAG_subprogram
18609 || abbrev
->tag
== DW_TAG_variable
18610 || abbrev
->tag
== DW_TAG_namespace
18611 || part_die
->is_declaration
)
18615 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18616 to_underlying (part_die
->sect_off
),
18621 /* For some DIEs we want to follow their children (if any). For C
18622 we have no reason to follow the children of structures; for other
18623 languages we have to, so that we can get at method physnames
18624 to infer fully qualified class names, for DW_AT_specification,
18625 and for C++ template arguments. For C++, we also look one level
18626 inside functions to find template arguments (if the name of the
18627 function does not already contain the template arguments).
18629 For Ada, we need to scan the children of subprograms and lexical
18630 blocks as well because Ada allows the definition of nested
18631 entities that could be interesting for the debugger, such as
18632 nested subprograms for instance. */
18633 if (last_die
->has_children
18635 || last_die
->tag
== DW_TAG_namespace
18636 || last_die
->tag
== DW_TAG_module
18637 || last_die
->tag
== DW_TAG_enumeration_type
18638 || (cu
->language
== language_cplus
18639 && last_die
->tag
== DW_TAG_subprogram
18640 && (last_die
->name
== NULL
18641 || strchr (last_die
->name
, '<') == NULL
))
18642 || (cu
->language
!= language_c
18643 && (last_die
->tag
== DW_TAG_class_type
18644 || last_die
->tag
== DW_TAG_interface_type
18645 || last_die
->tag
== DW_TAG_structure_type
18646 || last_die
->tag
== DW_TAG_union_type
))
18647 || (cu
->language
== language_ada
18648 && (last_die
->tag
== DW_TAG_subprogram
18649 || last_die
->tag
== DW_TAG_lexical_block
))))
18652 parent_die
= last_die
;
18656 /* Otherwise we skip to the next sibling, if any. */
18657 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18659 /* Back to the top, do it again. */
18663 partial_die_info::partial_die_info (sect_offset sect_off_
,
18664 struct abbrev_info
*abbrev
)
18665 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18669 /* Read a minimal amount of information into the minimal die structure.
18670 INFO_PTR should point just after the initial uleb128 of a DIE. */
18673 partial_die_info::read (const struct die_reader_specs
*reader
,
18674 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18676 struct dwarf2_cu
*cu
= reader
->cu
;
18677 struct dwarf2_per_objfile
*dwarf2_per_objfile
18678 = cu
->per_cu
->dwarf2_per_objfile
;
18680 int has_low_pc_attr
= 0;
18681 int has_high_pc_attr
= 0;
18682 int high_pc_relative
= 0;
18684 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18686 struct attribute attr
;
18688 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18690 /* Store the data if it is of an attribute we want to keep in a
18691 partial symbol table. */
18697 case DW_TAG_compile_unit
:
18698 case DW_TAG_partial_unit
:
18699 case DW_TAG_type_unit
:
18700 /* Compilation units have a DW_AT_name that is a filename, not
18701 a source language identifier. */
18702 case DW_TAG_enumeration_type
:
18703 case DW_TAG_enumerator
:
18704 /* These tags always have simple identifiers already; no need
18705 to canonicalize them. */
18706 name
= DW_STRING (&attr
);
18710 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18713 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18714 &objfile
->per_bfd
->storage_obstack
);
18719 case DW_AT_linkage_name
:
18720 case DW_AT_MIPS_linkage_name
:
18721 /* Note that both forms of linkage name might appear. We
18722 assume they will be the same, and we only store the last
18724 if (cu
->language
== language_ada
)
18725 name
= DW_STRING (&attr
);
18726 linkage_name
= DW_STRING (&attr
);
18729 has_low_pc_attr
= 1;
18730 lowpc
= attr_value_as_address (&attr
);
18732 case DW_AT_high_pc
:
18733 has_high_pc_attr
= 1;
18734 highpc
= attr_value_as_address (&attr
);
18735 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18736 high_pc_relative
= 1;
18738 case DW_AT_location
:
18739 /* Support the .debug_loc offsets. */
18740 if (attr_form_is_block (&attr
))
18742 d
.locdesc
= DW_BLOCK (&attr
);
18744 else if (attr_form_is_section_offset (&attr
))
18746 dwarf2_complex_location_expr_complaint ();
18750 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18751 "partial symbol information");
18754 case DW_AT_external
:
18755 is_external
= DW_UNSND (&attr
);
18757 case DW_AT_declaration
:
18758 is_declaration
= DW_UNSND (&attr
);
18763 case DW_AT_abstract_origin
:
18764 case DW_AT_specification
:
18765 case DW_AT_extension
:
18766 has_specification
= 1;
18767 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18768 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18769 || cu
->per_cu
->is_dwz
);
18771 case DW_AT_sibling
:
18772 /* Ignore absolute siblings, they might point outside of
18773 the current compile unit. */
18774 if (attr
.form
== DW_FORM_ref_addr
)
18775 complaint (_("ignoring absolute DW_AT_sibling"));
18778 const gdb_byte
*buffer
= reader
->buffer
;
18779 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18780 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18782 if (sibling_ptr
< info_ptr
)
18783 complaint (_("DW_AT_sibling points backwards"));
18784 else if (sibling_ptr
> reader
->buffer_end
)
18785 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18787 sibling
= sibling_ptr
;
18790 case DW_AT_byte_size
:
18793 case DW_AT_const_value
:
18794 has_const_value
= 1;
18796 case DW_AT_calling_convention
:
18797 /* DWARF doesn't provide a way to identify a program's source-level
18798 entry point. DW_AT_calling_convention attributes are only meant
18799 to describe functions' calling conventions.
18801 However, because it's a necessary piece of information in
18802 Fortran, and before DWARF 4 DW_CC_program was the only
18803 piece of debugging information whose definition refers to
18804 a 'main program' at all, several compilers marked Fortran
18805 main programs with DW_CC_program --- even when those
18806 functions use the standard calling conventions.
18808 Although DWARF now specifies a way to provide this
18809 information, we support this practice for backward
18811 if (DW_UNSND (&attr
) == DW_CC_program
18812 && cu
->language
== language_fortran
)
18813 main_subprogram
= 1;
18816 if (DW_UNSND (&attr
) == DW_INL_inlined
18817 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18818 may_be_inlined
= 1;
18822 if (tag
== DW_TAG_imported_unit
)
18824 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18825 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18826 || cu
->per_cu
->is_dwz
);
18830 case DW_AT_main_subprogram
:
18831 main_subprogram
= DW_UNSND (&attr
);
18836 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18837 but that requires a full DIE, so instead we just
18839 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18840 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18841 + (need_ranges_base
18845 /* Value of the DW_AT_ranges attribute is the offset in the
18846 .debug_ranges section. */
18847 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18858 if (high_pc_relative
)
18861 if (has_low_pc_attr
&& has_high_pc_attr
)
18863 /* When using the GNU linker, .gnu.linkonce. sections are used to
18864 eliminate duplicate copies of functions and vtables and such.
18865 The linker will arbitrarily choose one and discard the others.
18866 The AT_*_pc values for such functions refer to local labels in
18867 these sections. If the section from that file was discarded, the
18868 labels are not in the output, so the relocs get a value of 0.
18869 If this is a discarded function, mark the pc bounds as invalid,
18870 so that GDB will ignore it. */
18871 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18873 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18874 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18876 complaint (_("DW_AT_low_pc %s is zero "
18877 "for DIE at %s [in module %s]"),
18878 paddress (gdbarch
, lowpc
),
18879 sect_offset_str (sect_off
),
18880 objfile_name (objfile
));
18882 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18883 else if (lowpc
>= highpc
)
18885 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18886 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18888 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18889 "for DIE at %s [in module %s]"),
18890 paddress (gdbarch
, lowpc
),
18891 paddress (gdbarch
, highpc
),
18892 sect_offset_str (sect_off
),
18893 objfile_name (objfile
));
18902 /* Find a cached partial DIE at OFFSET in CU. */
18904 struct partial_die_info
*
18905 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18907 struct partial_die_info
*lookup_die
= NULL
;
18908 struct partial_die_info
part_die (sect_off
);
18910 lookup_die
= ((struct partial_die_info
*)
18911 htab_find_with_hash (partial_dies
, &part_die
,
18912 to_underlying (sect_off
)));
18917 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18918 except in the case of .debug_types DIEs which do not reference
18919 outside their CU (they do however referencing other types via
18920 DW_FORM_ref_sig8). */
18922 static struct cu_partial_die_info
18923 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18925 struct dwarf2_per_objfile
*dwarf2_per_objfile
18926 = cu
->per_cu
->dwarf2_per_objfile
;
18927 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18928 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18929 struct partial_die_info
*pd
= NULL
;
18931 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18932 && offset_in_cu_p (&cu
->header
, sect_off
))
18934 pd
= cu
->find_partial_die (sect_off
);
18937 /* We missed recording what we needed.
18938 Load all dies and try again. */
18939 per_cu
= cu
->per_cu
;
18943 /* TUs don't reference other CUs/TUs (except via type signatures). */
18944 if (cu
->per_cu
->is_debug_types
)
18946 error (_("Dwarf Error: Type Unit at offset %s contains"
18947 " external reference to offset %s [in module %s].\n"),
18948 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18949 bfd_get_filename (objfile
->obfd
));
18951 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18952 dwarf2_per_objfile
);
18954 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18955 load_partial_comp_unit (per_cu
);
18957 per_cu
->cu
->last_used
= 0;
18958 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18961 /* If we didn't find it, and not all dies have been loaded,
18962 load them all and try again. */
18964 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18966 per_cu
->load_all_dies
= 1;
18968 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18969 THIS_CU->cu may already be in use. So we can't just free it and
18970 replace its DIEs with the ones we read in. Instead, we leave those
18971 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18972 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18974 load_partial_comp_unit (per_cu
);
18976 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18980 internal_error (__FILE__
, __LINE__
,
18981 _("could not find partial DIE %s "
18982 "in cache [from module %s]\n"),
18983 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18984 return { per_cu
->cu
, pd
};
18987 /* See if we can figure out if the class lives in a namespace. We do
18988 this by looking for a member function; its demangled name will
18989 contain namespace info, if there is any. */
18992 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18993 struct dwarf2_cu
*cu
)
18995 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18996 what template types look like, because the demangler
18997 frequently doesn't give the same name as the debug info. We
18998 could fix this by only using the demangled name to get the
18999 prefix (but see comment in read_structure_type). */
19001 struct partial_die_info
*real_pdi
;
19002 struct partial_die_info
*child_pdi
;
19003 struct cu_partial_die_info res
;
19005 /* If this DIE (this DIE's specification, if any) has a parent, then
19006 we should not do this. We'll prepend the parent's fully qualified
19007 name when we create the partial symbol. */
19009 real_pdi
= struct_pdi
;
19010 while (real_pdi
->has_specification
)
19012 res
= find_partial_die (real_pdi
->spec_offset
,
19013 real_pdi
->spec_is_dwz
, cu
);
19014 real_pdi
= res
.pdi
;
19018 if (real_pdi
->die_parent
!= NULL
)
19021 for (child_pdi
= struct_pdi
->die_child
;
19023 child_pdi
= child_pdi
->die_sibling
)
19025 if (child_pdi
->tag
== DW_TAG_subprogram
19026 && child_pdi
->linkage_name
!= NULL
)
19028 char *actual_class_name
19029 = language_class_name_from_physname (cu
->language_defn
,
19030 child_pdi
->linkage_name
);
19031 if (actual_class_name
!= NULL
)
19033 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19036 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
19038 strlen (actual_class_name
)));
19039 xfree (actual_class_name
);
19047 partial_die_info::fixup (struct dwarf2_cu
*cu
)
19049 /* Once we've fixed up a die, there's no point in doing so again.
19050 This also avoids a memory leak if we were to call
19051 guess_partial_die_structure_name multiple times. */
19055 /* If we found a reference attribute and the DIE has no name, try
19056 to find a name in the referred to DIE. */
19058 if (name
== NULL
&& has_specification
)
19060 struct partial_die_info
*spec_die
;
19061 struct cu_partial_die_info res
;
19063 res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
19064 spec_die
= res
.pdi
;
19067 spec_die
->fixup (cu
);
19069 if (spec_die
->name
)
19071 name
= spec_die
->name
;
19073 /* Copy DW_AT_external attribute if it is set. */
19074 if (spec_die
->is_external
)
19075 is_external
= spec_die
->is_external
;
19079 /* Set default names for some unnamed DIEs. */
19081 if (name
== NULL
&& tag
== DW_TAG_namespace
)
19082 name
= CP_ANONYMOUS_NAMESPACE_STR
;
19084 /* If there is no parent die to provide a namespace, and there are
19085 children, see if we can determine the namespace from their linkage
19087 if (cu
->language
== language_cplus
19088 && !VEC_empty (dwarf2_section_info_def
,
19089 cu
->per_cu
->dwarf2_per_objfile
->types
)
19090 && die_parent
== NULL
19092 && (tag
== DW_TAG_class_type
19093 || tag
== DW_TAG_structure_type
19094 || tag
== DW_TAG_union_type
))
19095 guess_partial_die_structure_name (this, cu
);
19097 /* GCC might emit a nameless struct or union that has a linkage
19098 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19100 && (tag
== DW_TAG_class_type
19101 || tag
== DW_TAG_interface_type
19102 || tag
== DW_TAG_structure_type
19103 || tag
== DW_TAG_union_type
)
19104 && linkage_name
!= NULL
)
19108 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
19113 /* Strip any leading namespaces/classes, keep only the base name.
19114 DW_AT_name for named DIEs does not contain the prefixes. */
19115 base
= strrchr (demangled
, ':');
19116 if (base
&& base
> demangled
&& base
[-1] == ':')
19121 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19124 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
19125 base
, strlen (base
)));
19133 /* Read an attribute value described by an attribute form. */
19135 static const gdb_byte
*
19136 read_attribute_value (const struct die_reader_specs
*reader
,
19137 struct attribute
*attr
, unsigned form
,
19138 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
19140 struct dwarf2_cu
*cu
= reader
->cu
;
19141 struct dwarf2_per_objfile
*dwarf2_per_objfile
19142 = cu
->per_cu
->dwarf2_per_objfile
;
19143 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19144 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19145 bfd
*abfd
= reader
->abfd
;
19146 struct comp_unit_head
*cu_header
= &cu
->header
;
19147 unsigned int bytes_read
;
19148 struct dwarf_block
*blk
;
19150 attr
->form
= (enum dwarf_form
) form
;
19153 case DW_FORM_ref_addr
:
19154 if (cu
->header
.version
== 2)
19155 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
19157 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
19158 &cu
->header
, &bytes_read
);
19159 info_ptr
+= bytes_read
;
19161 case DW_FORM_GNU_ref_alt
:
19162 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19163 info_ptr
+= bytes_read
;
19166 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
19167 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
19168 info_ptr
+= bytes_read
;
19170 case DW_FORM_block2
:
19171 blk
= dwarf_alloc_block (cu
);
19172 blk
->size
= read_2_bytes (abfd
, info_ptr
);
19174 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19175 info_ptr
+= blk
->size
;
19176 DW_BLOCK (attr
) = blk
;
19178 case DW_FORM_block4
:
19179 blk
= dwarf_alloc_block (cu
);
19180 blk
->size
= read_4_bytes (abfd
, info_ptr
);
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_data2
:
19187 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
19190 case DW_FORM_data4
:
19191 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
19194 case DW_FORM_data8
:
19195 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
19198 case DW_FORM_data16
:
19199 blk
= dwarf_alloc_block (cu
);
19201 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19203 DW_BLOCK (attr
) = blk
;
19205 case DW_FORM_sec_offset
:
19206 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19207 info_ptr
+= bytes_read
;
19209 case DW_FORM_string
:
19210 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19211 DW_STRING_IS_CANONICAL (attr
) = 0;
19212 info_ptr
+= bytes_read
;
19215 if (!cu
->per_cu
->is_dwz
)
19217 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19218 abfd
, info_ptr
, cu_header
,
19220 DW_STRING_IS_CANONICAL (attr
) = 0;
19221 info_ptr
+= bytes_read
;
19225 case DW_FORM_line_strp
:
19226 if (!cu
->per_cu
->is_dwz
)
19228 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
19230 cu_header
, &bytes_read
);
19231 DW_STRING_IS_CANONICAL (attr
) = 0;
19232 info_ptr
+= bytes_read
;
19236 case DW_FORM_GNU_strp_alt
:
19238 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19239 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
19242 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
19244 DW_STRING_IS_CANONICAL (attr
) = 0;
19245 info_ptr
+= bytes_read
;
19248 case DW_FORM_exprloc
:
19249 case DW_FORM_block
:
19250 blk
= dwarf_alloc_block (cu
);
19251 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19252 info_ptr
+= bytes_read
;
19253 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19254 info_ptr
+= blk
->size
;
19255 DW_BLOCK (attr
) = blk
;
19257 case DW_FORM_block1
:
19258 blk
= dwarf_alloc_block (cu
);
19259 blk
->size
= read_1_byte (abfd
, info_ptr
);
19261 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19262 info_ptr
+= blk
->size
;
19263 DW_BLOCK (attr
) = blk
;
19265 case DW_FORM_data1
:
19266 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19270 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19273 case DW_FORM_flag_present
:
19274 DW_UNSND (attr
) = 1;
19276 case DW_FORM_sdata
:
19277 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19278 info_ptr
+= bytes_read
;
19280 case DW_FORM_udata
:
19281 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19282 info_ptr
+= bytes_read
;
19285 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19286 + read_1_byte (abfd
, info_ptr
));
19290 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19291 + read_2_bytes (abfd
, info_ptr
));
19295 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19296 + read_4_bytes (abfd
, info_ptr
));
19300 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19301 + read_8_bytes (abfd
, info_ptr
));
19304 case DW_FORM_ref_sig8
:
19305 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19308 case DW_FORM_ref_udata
:
19309 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19310 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19311 info_ptr
+= bytes_read
;
19313 case DW_FORM_indirect
:
19314 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19315 info_ptr
+= bytes_read
;
19316 if (form
== DW_FORM_implicit_const
)
19318 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19319 info_ptr
+= bytes_read
;
19321 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19324 case DW_FORM_implicit_const
:
19325 DW_SND (attr
) = implicit_const
;
19327 case DW_FORM_addrx
:
19328 case DW_FORM_GNU_addr_index
:
19329 if (reader
->dwo_file
== NULL
)
19331 /* For now flag a hard error.
19332 Later we can turn this into a complaint. */
19333 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19334 dwarf_form_name (form
),
19335 bfd_get_filename (abfd
));
19337 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19338 info_ptr
+= bytes_read
;
19341 case DW_FORM_strx1
:
19342 case DW_FORM_strx2
:
19343 case DW_FORM_strx3
:
19344 case DW_FORM_strx4
:
19345 case DW_FORM_GNU_str_index
:
19346 if (reader
->dwo_file
== NULL
)
19348 /* For now flag a hard error.
19349 Later we can turn this into a complaint if warranted. */
19350 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19351 dwarf_form_name (form
),
19352 bfd_get_filename (abfd
));
19355 ULONGEST str_index
;
19356 if (form
== DW_FORM_strx1
)
19358 str_index
= read_1_byte (abfd
, info_ptr
);
19361 else if (form
== DW_FORM_strx2
)
19363 str_index
= read_2_bytes (abfd
, info_ptr
);
19366 else if (form
== DW_FORM_strx3
)
19368 str_index
= read_3_bytes (abfd
, info_ptr
);
19371 else if (form
== DW_FORM_strx4
)
19373 str_index
= read_4_bytes (abfd
, info_ptr
);
19378 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19379 info_ptr
+= bytes_read
;
19381 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19382 DW_STRING_IS_CANONICAL (attr
) = 0;
19386 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19387 dwarf_form_name (form
),
19388 bfd_get_filename (abfd
));
19392 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19393 attr
->form
= DW_FORM_GNU_ref_alt
;
19395 /* We have seen instances where the compiler tried to emit a byte
19396 size attribute of -1 which ended up being encoded as an unsigned
19397 0xffffffff. Although 0xffffffff is technically a valid size value,
19398 an object of this size seems pretty unlikely so we can relatively
19399 safely treat these cases as if the size attribute was invalid and
19400 treat them as zero by default. */
19401 if (attr
->name
== DW_AT_byte_size
19402 && form
== DW_FORM_data4
19403 && DW_UNSND (attr
) >= 0xffffffff)
19406 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19407 hex_string (DW_UNSND (attr
)));
19408 DW_UNSND (attr
) = 0;
19414 /* Read an attribute described by an abbreviated attribute. */
19416 static const gdb_byte
*
19417 read_attribute (const struct die_reader_specs
*reader
,
19418 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19419 const gdb_byte
*info_ptr
)
19421 attr
->name
= abbrev
->name
;
19422 return read_attribute_value (reader
, attr
, abbrev
->form
,
19423 abbrev
->implicit_const
, info_ptr
);
19426 /* Read dwarf information from a buffer. */
19428 static unsigned int
19429 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19431 return bfd_get_8 (abfd
, buf
);
19435 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19437 return bfd_get_signed_8 (abfd
, buf
);
19440 static unsigned int
19441 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19443 return bfd_get_16 (abfd
, buf
);
19447 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19449 return bfd_get_signed_16 (abfd
, buf
);
19452 static unsigned int
19453 read_3_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19455 unsigned int result
= 0;
19456 for (int i
= 0; i
< 3; ++i
)
19458 unsigned char byte
= bfd_get_8 (abfd
, buf
);
19460 result
|= ((unsigned int) byte
<< (i
* 8));
19465 static unsigned int
19466 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19468 return bfd_get_32 (abfd
, buf
);
19472 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19474 return bfd_get_signed_32 (abfd
, buf
);
19478 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19480 return bfd_get_64 (abfd
, buf
);
19484 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19485 unsigned int *bytes_read
)
19487 struct comp_unit_head
*cu_header
= &cu
->header
;
19488 CORE_ADDR retval
= 0;
19490 if (cu_header
->signed_addr_p
)
19492 switch (cu_header
->addr_size
)
19495 retval
= bfd_get_signed_16 (abfd
, buf
);
19498 retval
= bfd_get_signed_32 (abfd
, buf
);
19501 retval
= bfd_get_signed_64 (abfd
, buf
);
19504 internal_error (__FILE__
, __LINE__
,
19505 _("read_address: bad switch, signed [in module %s]"),
19506 bfd_get_filename (abfd
));
19511 switch (cu_header
->addr_size
)
19514 retval
= bfd_get_16 (abfd
, buf
);
19517 retval
= bfd_get_32 (abfd
, buf
);
19520 retval
= bfd_get_64 (abfd
, buf
);
19523 internal_error (__FILE__
, __LINE__
,
19524 _("read_address: bad switch, "
19525 "unsigned [in module %s]"),
19526 bfd_get_filename (abfd
));
19530 *bytes_read
= cu_header
->addr_size
;
19534 /* Read the initial length from a section. The (draft) DWARF 3
19535 specification allows the initial length to take up either 4 bytes
19536 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19537 bytes describe the length and all offsets will be 8 bytes in length
19540 An older, non-standard 64-bit format is also handled by this
19541 function. The older format in question stores the initial length
19542 as an 8-byte quantity without an escape value. Lengths greater
19543 than 2^32 aren't very common which means that the initial 4 bytes
19544 is almost always zero. Since a length value of zero doesn't make
19545 sense for the 32-bit format, this initial zero can be considered to
19546 be an escape value which indicates the presence of the older 64-bit
19547 format. As written, the code can't detect (old format) lengths
19548 greater than 4GB. If it becomes necessary to handle lengths
19549 somewhat larger than 4GB, we could allow other small values (such
19550 as the non-sensical values of 1, 2, and 3) to also be used as
19551 escape values indicating the presence of the old format.
19553 The value returned via bytes_read should be used to increment the
19554 relevant pointer after calling read_initial_length().
19556 [ Note: read_initial_length() and read_offset() are based on the
19557 document entitled "DWARF Debugging Information Format", revision
19558 3, draft 8, dated November 19, 2001. This document was obtained
19561 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19563 This document is only a draft and is subject to change. (So beware.)
19565 Details regarding the older, non-standard 64-bit format were
19566 determined empirically by examining 64-bit ELF files produced by
19567 the SGI toolchain on an IRIX 6.5 machine.
19569 - Kevin, July 16, 2002
19573 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19575 LONGEST length
= bfd_get_32 (abfd
, buf
);
19577 if (length
== 0xffffffff)
19579 length
= bfd_get_64 (abfd
, buf
+ 4);
19582 else if (length
== 0)
19584 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19585 length
= bfd_get_64 (abfd
, buf
);
19596 /* Cover function for read_initial_length.
19597 Returns the length of the object at BUF, and stores the size of the
19598 initial length in *BYTES_READ and stores the size that offsets will be in
19600 If the initial length size is not equivalent to that specified in
19601 CU_HEADER then issue a complaint.
19602 This is useful when reading non-comp-unit headers. */
19605 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19606 const struct comp_unit_head
*cu_header
,
19607 unsigned int *bytes_read
,
19608 unsigned int *offset_size
)
19610 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19612 gdb_assert (cu_header
->initial_length_size
== 4
19613 || cu_header
->initial_length_size
== 8
19614 || cu_header
->initial_length_size
== 12);
19616 if (cu_header
->initial_length_size
!= *bytes_read
)
19617 complaint (_("intermixed 32-bit and 64-bit DWARF sections"));
19619 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19623 /* Read an offset from the data stream. The size of the offset is
19624 given by cu_header->offset_size. */
19627 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19628 const struct comp_unit_head
*cu_header
,
19629 unsigned int *bytes_read
)
19631 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19633 *bytes_read
= cu_header
->offset_size
;
19637 /* Read an offset from the data stream. */
19640 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19642 LONGEST retval
= 0;
19644 switch (offset_size
)
19647 retval
= bfd_get_32 (abfd
, buf
);
19650 retval
= bfd_get_64 (abfd
, buf
);
19653 internal_error (__FILE__
, __LINE__
,
19654 _("read_offset_1: bad switch [in module %s]"),
19655 bfd_get_filename (abfd
));
19661 static const gdb_byte
*
19662 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19664 /* If the size of a host char is 8 bits, we can return a pointer
19665 to the buffer, otherwise we have to copy the data to a buffer
19666 allocated on the temporary obstack. */
19667 gdb_assert (HOST_CHAR_BIT
== 8);
19671 static const char *
19672 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19673 unsigned int *bytes_read_ptr
)
19675 /* If the size of a host char is 8 bits, we can return a pointer
19676 to the string, otherwise we have to copy the string to a buffer
19677 allocated on the temporary obstack. */
19678 gdb_assert (HOST_CHAR_BIT
== 8);
19681 *bytes_read_ptr
= 1;
19684 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19685 return (const char *) buf
;
19688 /* Return pointer to string at section SECT offset STR_OFFSET with error
19689 reporting strings FORM_NAME and SECT_NAME. */
19691 static const char *
19692 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19693 bfd
*abfd
, LONGEST str_offset
,
19694 struct dwarf2_section_info
*sect
,
19695 const char *form_name
,
19696 const char *sect_name
)
19698 dwarf2_read_section (objfile
, sect
);
19699 if (sect
->buffer
== NULL
)
19700 error (_("%s used without %s section [in module %s]"),
19701 form_name
, sect_name
, bfd_get_filename (abfd
));
19702 if (str_offset
>= sect
->size
)
19703 error (_("%s pointing outside of %s section [in module %s]"),
19704 form_name
, sect_name
, bfd_get_filename (abfd
));
19705 gdb_assert (HOST_CHAR_BIT
== 8);
19706 if (sect
->buffer
[str_offset
] == '\0')
19708 return (const char *) (sect
->buffer
+ str_offset
);
19711 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19713 static const char *
19714 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19715 bfd
*abfd
, LONGEST str_offset
)
19717 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19719 &dwarf2_per_objfile
->str
,
19720 "DW_FORM_strp", ".debug_str");
19723 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19725 static const char *
19726 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19727 bfd
*abfd
, LONGEST str_offset
)
19729 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19731 &dwarf2_per_objfile
->line_str
,
19732 "DW_FORM_line_strp",
19733 ".debug_line_str");
19736 /* Read a string at offset STR_OFFSET in the .debug_str section from
19737 the .dwz file DWZ. Throw an error if the offset is too large. If
19738 the string consists of a single NUL byte, return NULL; otherwise
19739 return a pointer to the string. */
19741 static const char *
19742 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19743 LONGEST str_offset
)
19745 dwarf2_read_section (objfile
, &dwz
->str
);
19747 if (dwz
->str
.buffer
== NULL
)
19748 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19749 "section [in module %s]"),
19750 bfd_get_filename (dwz
->dwz_bfd
));
19751 if (str_offset
>= dwz
->str
.size
)
19752 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19753 ".debug_str section [in module %s]"),
19754 bfd_get_filename (dwz
->dwz_bfd
));
19755 gdb_assert (HOST_CHAR_BIT
== 8);
19756 if (dwz
->str
.buffer
[str_offset
] == '\0')
19758 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19761 /* Return pointer to string at .debug_str offset as read from BUF.
19762 BUF is assumed to be in a compilation unit described by CU_HEADER.
19763 Return *BYTES_READ_PTR count of bytes read from BUF. */
19765 static const char *
19766 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19767 const gdb_byte
*buf
,
19768 const struct comp_unit_head
*cu_header
,
19769 unsigned int *bytes_read_ptr
)
19771 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19773 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19776 /* Return pointer to string at .debug_line_str offset as read from BUF.
19777 BUF is assumed to be in a compilation unit described by CU_HEADER.
19778 Return *BYTES_READ_PTR count of bytes read from BUF. */
19780 static const char *
19781 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19782 bfd
*abfd
, const gdb_byte
*buf
,
19783 const struct comp_unit_head
*cu_header
,
19784 unsigned int *bytes_read_ptr
)
19786 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19788 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19793 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19794 unsigned int *bytes_read_ptr
)
19797 unsigned int num_read
;
19799 unsigned char byte
;
19806 byte
= bfd_get_8 (abfd
, buf
);
19809 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19810 if ((byte
& 128) == 0)
19816 *bytes_read_ptr
= num_read
;
19821 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19822 unsigned int *bytes_read_ptr
)
19825 int shift
, num_read
;
19826 unsigned char byte
;
19833 byte
= bfd_get_8 (abfd
, buf
);
19836 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19838 if ((byte
& 128) == 0)
19843 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19844 result
|= -(((ULONGEST
) 1) << shift
);
19845 *bytes_read_ptr
= num_read
;
19849 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19850 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19851 ADDR_SIZE is the size of addresses from the CU header. */
19854 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19855 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19857 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19858 bfd
*abfd
= objfile
->obfd
;
19859 const gdb_byte
*info_ptr
;
19861 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19862 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19863 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19864 objfile_name (objfile
));
19865 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19866 error (_("DW_FORM_addr_index pointing outside of "
19867 ".debug_addr section [in module %s]"),
19868 objfile_name (objfile
));
19869 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19870 + addr_base
+ addr_index
* addr_size
);
19871 if (addr_size
== 4)
19872 return bfd_get_32 (abfd
, info_ptr
);
19874 return bfd_get_64 (abfd
, info_ptr
);
19877 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19880 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19882 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19883 cu
->addr_base
, cu
->header
.addr_size
);
19886 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19889 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19890 unsigned int *bytes_read
)
19892 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19893 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19895 return read_addr_index (cu
, addr_index
);
19898 /* Data structure to pass results from dwarf2_read_addr_index_reader
19899 back to dwarf2_read_addr_index. */
19901 struct dwarf2_read_addr_index_data
19903 ULONGEST addr_base
;
19907 /* die_reader_func for dwarf2_read_addr_index. */
19910 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19911 const gdb_byte
*info_ptr
,
19912 struct die_info
*comp_unit_die
,
19916 struct dwarf2_cu
*cu
= reader
->cu
;
19917 struct dwarf2_read_addr_index_data
*aidata
=
19918 (struct dwarf2_read_addr_index_data
*) data
;
19920 aidata
->addr_base
= cu
->addr_base
;
19921 aidata
->addr_size
= cu
->header
.addr_size
;
19924 /* Given an index in .debug_addr, fetch the value.
19925 NOTE: This can be called during dwarf expression evaluation,
19926 long after the debug information has been read, and thus per_cu->cu
19927 may no longer exist. */
19930 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19931 unsigned int addr_index
)
19933 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19934 struct dwarf2_cu
*cu
= per_cu
->cu
;
19935 ULONGEST addr_base
;
19938 /* We need addr_base and addr_size.
19939 If we don't have PER_CU->cu, we have to get it.
19940 Nasty, but the alternative is storing the needed info in PER_CU,
19941 which at this point doesn't seem justified: it's not clear how frequently
19942 it would get used and it would increase the size of every PER_CU.
19943 Entry points like dwarf2_per_cu_addr_size do a similar thing
19944 so we're not in uncharted territory here.
19945 Alas we need to be a bit more complicated as addr_base is contained
19948 We don't need to read the entire CU(/TU).
19949 We just need the header and top level die.
19951 IWBN to use the aging mechanism to let us lazily later discard the CU.
19952 For now we skip this optimization. */
19956 addr_base
= cu
->addr_base
;
19957 addr_size
= cu
->header
.addr_size
;
19961 struct dwarf2_read_addr_index_data aidata
;
19963 /* Note: We can't use init_cutu_and_read_dies_simple here,
19964 we need addr_base. */
19965 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0, false,
19966 dwarf2_read_addr_index_reader
, &aidata
);
19967 addr_base
= aidata
.addr_base
;
19968 addr_size
= aidata
.addr_size
;
19971 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19975 /* Given a DW_FORM_GNU_str_index or DW_FORM_strx, fetch the string.
19976 This is only used by the Fission support. */
19978 static const char *
19979 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19981 struct dwarf2_cu
*cu
= reader
->cu
;
19982 struct dwarf2_per_objfile
*dwarf2_per_objfile
19983 = cu
->per_cu
->dwarf2_per_objfile
;
19984 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19985 const char *objf_name
= objfile_name (objfile
);
19986 bfd
*abfd
= objfile
->obfd
;
19987 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19988 struct dwarf2_section_info
*str_offsets_section
=
19989 &reader
->dwo_file
->sections
.str_offsets
;
19990 const gdb_byte
*info_ptr
;
19991 ULONGEST str_offset
;
19992 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19994 dwarf2_read_section (objfile
, str_section
);
19995 dwarf2_read_section (objfile
, str_offsets_section
);
19996 if (str_section
->buffer
== NULL
)
19997 error (_("%s used without .debug_str.dwo section"
19998 " in CU at offset %s [in module %s]"),
19999 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20000 if (str_offsets_section
->buffer
== NULL
)
20001 error (_("%s used without .debug_str_offsets.dwo section"
20002 " in CU at offset %s [in module %s]"),
20003 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20004 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
20005 error (_("%s pointing outside of .debug_str_offsets.dwo"
20006 " section in CU at offset %s [in module %s]"),
20007 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20008 info_ptr
= (str_offsets_section
->buffer
20009 + str_index
* cu
->header
.offset_size
);
20010 if (cu
->header
.offset_size
== 4)
20011 str_offset
= bfd_get_32 (abfd
, info_ptr
);
20013 str_offset
= bfd_get_64 (abfd
, info_ptr
);
20014 if (str_offset
>= str_section
->size
)
20015 error (_("Offset from %s pointing outside of"
20016 " .debug_str.dwo section in CU at offset %s [in module %s]"),
20017 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20018 return (const char *) (str_section
->buffer
+ str_offset
);
20021 /* Return the length of an LEB128 number in BUF. */
20024 leb128_size (const gdb_byte
*buf
)
20026 const gdb_byte
*begin
= buf
;
20032 if ((byte
& 128) == 0)
20033 return buf
- begin
;
20038 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
20047 cu
->language
= language_c
;
20050 case DW_LANG_C_plus_plus
:
20051 case DW_LANG_C_plus_plus_11
:
20052 case DW_LANG_C_plus_plus_14
:
20053 cu
->language
= language_cplus
;
20056 cu
->language
= language_d
;
20058 case DW_LANG_Fortran77
:
20059 case DW_LANG_Fortran90
:
20060 case DW_LANG_Fortran95
:
20061 case DW_LANG_Fortran03
:
20062 case DW_LANG_Fortran08
:
20063 cu
->language
= language_fortran
;
20066 cu
->language
= language_go
;
20068 case DW_LANG_Mips_Assembler
:
20069 cu
->language
= language_asm
;
20071 case DW_LANG_Ada83
:
20072 case DW_LANG_Ada95
:
20073 cu
->language
= language_ada
;
20075 case DW_LANG_Modula2
:
20076 cu
->language
= language_m2
;
20078 case DW_LANG_Pascal83
:
20079 cu
->language
= language_pascal
;
20082 cu
->language
= language_objc
;
20085 case DW_LANG_Rust_old
:
20086 cu
->language
= language_rust
;
20088 case DW_LANG_Cobol74
:
20089 case DW_LANG_Cobol85
:
20091 cu
->language
= language_minimal
;
20094 cu
->language_defn
= language_def (cu
->language
);
20097 /* Return the named attribute or NULL if not there. */
20099 static struct attribute
*
20100 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20105 struct attribute
*spec
= NULL
;
20107 for (i
= 0; i
< die
->num_attrs
; ++i
)
20109 if (die
->attrs
[i
].name
== name
)
20110 return &die
->attrs
[i
];
20111 if (die
->attrs
[i
].name
== DW_AT_specification
20112 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
20113 spec
= &die
->attrs
[i
];
20119 die
= follow_die_ref (die
, spec
, &cu
);
20125 /* Return the named attribute or NULL if not there,
20126 but do not follow DW_AT_specification, etc.
20127 This is for use in contexts where we're reading .debug_types dies.
20128 Following DW_AT_specification, DW_AT_abstract_origin will take us
20129 back up the chain, and we want to go down. */
20131 static struct attribute
*
20132 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
20136 for (i
= 0; i
< die
->num_attrs
; ++i
)
20137 if (die
->attrs
[i
].name
== name
)
20138 return &die
->attrs
[i
];
20143 /* Return the string associated with a string-typed attribute, or NULL if it
20144 is either not found or is of an incorrect type. */
20146 static const char *
20147 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20149 struct attribute
*attr
;
20150 const char *str
= NULL
;
20152 attr
= dwarf2_attr (die
, name
, cu
);
20156 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
20157 || attr
->form
== DW_FORM_string
20158 || attr
->form
== DW_FORM_strx
20159 || attr
->form
== DW_FORM_GNU_str_index
20160 || attr
->form
== DW_FORM_GNU_strp_alt
)
20161 str
= DW_STRING (attr
);
20163 complaint (_("string type expected for attribute %s for "
20164 "DIE at %s in module %s"),
20165 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
20166 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
20172 /* Return non-zero iff the attribute NAME is defined for the given DIE,
20173 and holds a non-zero value. This function should only be used for
20174 DW_FORM_flag or DW_FORM_flag_present attributes. */
20177 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
20179 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
20181 return (attr
&& DW_UNSND (attr
));
20185 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
20187 /* A DIE is a declaration if it has a DW_AT_declaration attribute
20188 which value is non-zero. However, we have to be careful with
20189 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
20190 (via dwarf2_flag_true_p) follows this attribute. So we may
20191 end up accidently finding a declaration attribute that belongs
20192 to a different DIE referenced by the specification attribute,
20193 even though the given DIE does not have a declaration attribute. */
20194 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
20195 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
20198 /* Return the die giving the specification for DIE, if there is
20199 one. *SPEC_CU is the CU containing DIE on input, and the CU
20200 containing the return value on output. If there is no
20201 specification, but there is an abstract origin, that is
20204 static struct die_info
*
20205 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
20207 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
20210 if (spec_attr
== NULL
)
20211 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
20213 if (spec_attr
== NULL
)
20216 return follow_die_ref (die
, spec_attr
, spec_cu
);
20219 /* Stub for free_line_header to match void * callback types. */
20222 free_line_header_voidp (void *arg
)
20224 struct line_header
*lh
= (struct line_header
*) arg
;
20230 line_header::add_include_dir (const char *include_dir
)
20232 if (dwarf_line_debug
>= 2)
20233 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
20234 include_dirs
.size () + 1, include_dir
);
20236 include_dirs
.push_back (include_dir
);
20240 line_header::add_file_name (const char *name
,
20242 unsigned int mod_time
,
20243 unsigned int length
)
20245 if (dwarf_line_debug
>= 2)
20246 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
20247 (unsigned) file_names
.size () + 1, name
);
20249 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
20252 /* A convenience function to find the proper .debug_line section for a CU. */
20254 static struct dwarf2_section_info
*
20255 get_debug_line_section (struct dwarf2_cu
*cu
)
20257 struct dwarf2_section_info
*section
;
20258 struct dwarf2_per_objfile
*dwarf2_per_objfile
20259 = cu
->per_cu
->dwarf2_per_objfile
;
20261 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
20263 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20264 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
20265 else if (cu
->per_cu
->is_dwz
)
20267 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
20269 section
= &dwz
->line
;
20272 section
= &dwarf2_per_objfile
->line
;
20277 /* Read directory or file name entry format, starting with byte of
20278 format count entries, ULEB128 pairs of entry formats, ULEB128 of
20279 entries count and the entries themselves in the described entry
20283 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
20284 bfd
*abfd
, const gdb_byte
**bufp
,
20285 struct line_header
*lh
,
20286 const struct comp_unit_head
*cu_header
,
20287 void (*callback
) (struct line_header
*lh
,
20290 unsigned int mod_time
,
20291 unsigned int length
))
20293 gdb_byte format_count
, formati
;
20294 ULONGEST data_count
, datai
;
20295 const gdb_byte
*buf
= *bufp
;
20296 const gdb_byte
*format_header_data
;
20297 unsigned int bytes_read
;
20299 format_count
= read_1_byte (abfd
, buf
);
20301 format_header_data
= buf
;
20302 for (formati
= 0; formati
< format_count
; formati
++)
20304 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20306 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20310 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20312 for (datai
= 0; datai
< data_count
; datai
++)
20314 const gdb_byte
*format
= format_header_data
;
20315 struct file_entry fe
;
20317 for (formati
= 0; formati
< format_count
; formati
++)
20319 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20320 format
+= bytes_read
;
20322 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20323 format
+= bytes_read
;
20325 gdb::optional
<const char *> string
;
20326 gdb::optional
<unsigned int> uint
;
20330 case DW_FORM_string
:
20331 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
20335 case DW_FORM_line_strp
:
20336 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
20343 case DW_FORM_data1
:
20344 uint
.emplace (read_1_byte (abfd
, buf
));
20348 case DW_FORM_data2
:
20349 uint
.emplace (read_2_bytes (abfd
, buf
));
20353 case DW_FORM_data4
:
20354 uint
.emplace (read_4_bytes (abfd
, buf
));
20358 case DW_FORM_data8
:
20359 uint
.emplace (read_8_bytes (abfd
, buf
));
20363 case DW_FORM_udata
:
20364 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20368 case DW_FORM_block
:
20369 /* It is valid only for DW_LNCT_timestamp which is ignored by
20374 switch (content_type
)
20377 if (string
.has_value ())
20380 case DW_LNCT_directory_index
:
20381 if (uint
.has_value ())
20382 fe
.d_index
= (dir_index
) *uint
;
20384 case DW_LNCT_timestamp
:
20385 if (uint
.has_value ())
20386 fe
.mod_time
= *uint
;
20389 if (uint
.has_value ())
20395 complaint (_("Unknown format content type %s"),
20396 pulongest (content_type
));
20400 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20406 /* Read the statement program header starting at OFFSET in
20407 .debug_line, or .debug_line.dwo. Return a pointer
20408 to a struct line_header, allocated using xmalloc.
20409 Returns NULL if there is a problem reading the header, e.g., if it
20410 has a version we don't understand.
20412 NOTE: the strings in the include directory and file name tables of
20413 the returned object point into the dwarf line section buffer,
20414 and must not be freed. */
20416 static line_header_up
20417 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20419 const gdb_byte
*line_ptr
;
20420 unsigned int bytes_read
, offset_size
;
20422 const char *cur_dir
, *cur_file
;
20423 struct dwarf2_section_info
*section
;
20425 struct dwarf2_per_objfile
*dwarf2_per_objfile
20426 = cu
->per_cu
->dwarf2_per_objfile
;
20428 section
= get_debug_line_section (cu
);
20429 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20430 if (section
->buffer
== NULL
)
20432 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20433 complaint (_("missing .debug_line.dwo section"));
20435 complaint (_("missing .debug_line section"));
20439 /* We can't do this until we know the section is non-empty.
20440 Only then do we know we have such a section. */
20441 abfd
= get_section_bfd_owner (section
);
20443 /* Make sure that at least there's room for the total_length field.
20444 That could be 12 bytes long, but we're just going to fudge that. */
20445 if (to_underlying (sect_off
) + 4 >= section
->size
)
20447 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20451 line_header_up
lh (new line_header ());
20453 lh
->sect_off
= sect_off
;
20454 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20456 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20458 /* Read in the header. */
20460 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20461 &bytes_read
, &offset_size
);
20462 line_ptr
+= bytes_read
;
20463 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20465 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20468 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20469 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20471 if (lh
->version
> 5)
20473 /* This is a version we don't understand. The format could have
20474 changed in ways we don't handle properly so just punt. */
20475 complaint (_("unsupported version in .debug_line section"));
20478 if (lh
->version
>= 5)
20480 gdb_byte segment_selector_size
;
20482 /* Skip address size. */
20483 read_1_byte (abfd
, line_ptr
);
20486 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20488 if (segment_selector_size
!= 0)
20490 complaint (_("unsupported segment selector size %u "
20491 "in .debug_line section"),
20492 segment_selector_size
);
20496 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20497 line_ptr
+= offset_size
;
20498 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20500 if (lh
->version
>= 4)
20502 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20506 lh
->maximum_ops_per_instruction
= 1;
20508 if (lh
->maximum_ops_per_instruction
== 0)
20510 lh
->maximum_ops_per_instruction
= 1;
20511 complaint (_("invalid maximum_ops_per_instruction "
20512 "in `.debug_line' section"));
20515 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20517 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20519 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20521 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20523 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20525 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20526 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20528 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20532 if (lh
->version
>= 5)
20534 /* Read directory table. */
20535 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20537 [] (struct line_header
*header
, const char *name
,
20538 dir_index d_index
, unsigned int mod_time
,
20539 unsigned int length
)
20541 header
->add_include_dir (name
);
20544 /* Read file name table. */
20545 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20547 [] (struct line_header
*header
, const char *name
,
20548 dir_index d_index
, unsigned int mod_time
,
20549 unsigned int length
)
20551 header
->add_file_name (name
, d_index
, mod_time
, length
);
20556 /* Read directory table. */
20557 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20559 line_ptr
+= bytes_read
;
20560 lh
->add_include_dir (cur_dir
);
20562 line_ptr
+= bytes_read
;
20564 /* Read file name table. */
20565 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20567 unsigned int mod_time
, length
;
20570 line_ptr
+= bytes_read
;
20571 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20572 line_ptr
+= bytes_read
;
20573 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20574 line_ptr
+= bytes_read
;
20575 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20576 line_ptr
+= bytes_read
;
20578 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20580 line_ptr
+= bytes_read
;
20582 lh
->statement_program_start
= line_ptr
;
20584 if (line_ptr
> (section
->buffer
+ section
->size
))
20585 complaint (_("line number info header doesn't "
20586 "fit in `.debug_line' section"));
20591 /* Subroutine of dwarf_decode_lines to simplify it.
20592 Return the file name of the psymtab for included file FILE_INDEX
20593 in line header LH of PST.
20594 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20595 If space for the result is malloc'd, *NAME_HOLDER will be set.
20596 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20598 static const char *
20599 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20600 const struct partial_symtab
*pst
,
20601 const char *comp_dir
,
20602 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20604 const file_entry
&fe
= lh
->file_names
[file_index
];
20605 const char *include_name
= fe
.name
;
20606 const char *include_name_to_compare
= include_name
;
20607 const char *pst_filename
;
20610 const char *dir_name
= fe
.include_dir (lh
);
20612 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20613 if (!IS_ABSOLUTE_PATH (include_name
)
20614 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20616 /* Avoid creating a duplicate psymtab for PST.
20617 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20618 Before we do the comparison, however, we need to account
20619 for DIR_NAME and COMP_DIR.
20620 First prepend dir_name (if non-NULL). If we still don't
20621 have an absolute path prepend comp_dir (if non-NULL).
20622 However, the directory we record in the include-file's
20623 psymtab does not contain COMP_DIR (to match the
20624 corresponding symtab(s)).
20629 bash$ gcc -g ./hello.c
20630 include_name = "hello.c"
20632 DW_AT_comp_dir = comp_dir = "/tmp"
20633 DW_AT_name = "./hello.c"
20637 if (dir_name
!= NULL
)
20639 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20640 include_name
, (char *) NULL
));
20641 include_name
= name_holder
->get ();
20642 include_name_to_compare
= include_name
;
20644 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20646 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20647 include_name
, (char *) NULL
));
20648 include_name_to_compare
= hold_compare
.get ();
20652 pst_filename
= pst
->filename
;
20653 gdb::unique_xmalloc_ptr
<char> copied_name
;
20654 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20656 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20657 pst_filename
, (char *) NULL
));
20658 pst_filename
= copied_name
.get ();
20661 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20665 return include_name
;
20668 /* State machine to track the state of the line number program. */
20670 class lnp_state_machine
20673 /* Initialize a machine state for the start of a line number
20675 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
20676 bool record_lines_p
);
20678 file_entry
*current_file ()
20680 /* lh->file_names is 0-based, but the file name numbers in the
20681 statement program are 1-based. */
20682 return m_line_header
->file_name_at (m_file
);
20685 /* Record the line in the state machine. END_SEQUENCE is true if
20686 we're processing the end of a sequence. */
20687 void record_line (bool end_sequence
);
20689 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
20690 nop-out rest of the lines in this sequence. */
20691 void check_line_address (struct dwarf2_cu
*cu
,
20692 const gdb_byte
*line_ptr
,
20693 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
20695 void handle_set_discriminator (unsigned int discriminator
)
20697 m_discriminator
= discriminator
;
20698 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20701 /* Handle DW_LNE_set_address. */
20702 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20705 address
+= baseaddr
;
20706 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20709 /* Handle DW_LNS_advance_pc. */
20710 void handle_advance_pc (CORE_ADDR adjust
);
20712 /* Handle a special opcode. */
20713 void handle_special_opcode (unsigned char op_code
);
20715 /* Handle DW_LNS_advance_line. */
20716 void handle_advance_line (int line_delta
)
20718 advance_line (line_delta
);
20721 /* Handle DW_LNS_set_file. */
20722 void handle_set_file (file_name_index file
);
20724 /* Handle DW_LNS_negate_stmt. */
20725 void handle_negate_stmt ()
20727 m_is_stmt
= !m_is_stmt
;
20730 /* Handle DW_LNS_const_add_pc. */
20731 void handle_const_add_pc ();
20733 /* Handle DW_LNS_fixed_advance_pc. */
20734 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20736 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20740 /* Handle DW_LNS_copy. */
20741 void handle_copy ()
20743 record_line (false);
20744 m_discriminator
= 0;
20747 /* Handle DW_LNE_end_sequence. */
20748 void handle_end_sequence ()
20750 m_currently_recording_lines
= true;
20754 /* Advance the line by LINE_DELTA. */
20755 void advance_line (int line_delta
)
20757 m_line
+= line_delta
;
20759 if (line_delta
!= 0)
20760 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20763 struct dwarf2_cu
*m_cu
;
20765 gdbarch
*m_gdbarch
;
20767 /* True if we're recording lines.
20768 Otherwise we're building partial symtabs and are just interested in
20769 finding include files mentioned by the line number program. */
20770 bool m_record_lines_p
;
20772 /* The line number header. */
20773 line_header
*m_line_header
;
20775 /* These are part of the standard DWARF line number state machine,
20776 and initialized according to the DWARF spec. */
20778 unsigned char m_op_index
= 0;
20779 /* The line table index (1-based) of the current file. */
20780 file_name_index m_file
= (file_name_index
) 1;
20781 unsigned int m_line
= 1;
20783 /* These are initialized in the constructor. */
20785 CORE_ADDR m_address
;
20787 unsigned int m_discriminator
;
20789 /* Additional bits of state we need to track. */
20791 /* The last file that we called dwarf2_start_subfile for.
20792 This is only used for TLLs. */
20793 unsigned int m_last_file
= 0;
20794 /* The last file a line number was recorded for. */
20795 struct subfile
*m_last_subfile
= NULL
;
20797 /* When true, record the lines we decode. */
20798 bool m_currently_recording_lines
= false;
20800 /* The last line number that was recorded, used to coalesce
20801 consecutive entries for the same line. This can happen, for
20802 example, when discriminators are present. PR 17276. */
20803 unsigned int m_last_line
= 0;
20804 bool m_line_has_non_zero_discriminator
= false;
20808 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20810 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20811 / m_line_header
->maximum_ops_per_instruction
)
20812 * m_line_header
->minimum_instruction_length
);
20813 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20814 m_op_index
= ((m_op_index
+ adjust
)
20815 % m_line_header
->maximum_ops_per_instruction
);
20819 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20821 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20822 CORE_ADDR addr_adj
= (((m_op_index
20823 + (adj_opcode
/ m_line_header
->line_range
))
20824 / m_line_header
->maximum_ops_per_instruction
)
20825 * m_line_header
->minimum_instruction_length
);
20826 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20827 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20828 % m_line_header
->maximum_ops_per_instruction
);
20830 int line_delta
= (m_line_header
->line_base
20831 + (adj_opcode
% m_line_header
->line_range
));
20832 advance_line (line_delta
);
20833 record_line (false);
20834 m_discriminator
= 0;
20838 lnp_state_machine::handle_set_file (file_name_index file
)
20842 const file_entry
*fe
= current_file ();
20844 dwarf2_debug_line_missing_file_complaint ();
20845 else if (m_record_lines_p
)
20847 const char *dir
= fe
->include_dir (m_line_header
);
20849 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20850 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20851 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
20856 lnp_state_machine::handle_const_add_pc ()
20859 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20862 = (((m_op_index
+ adjust
)
20863 / m_line_header
->maximum_ops_per_instruction
)
20864 * m_line_header
->minimum_instruction_length
);
20866 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20867 m_op_index
= ((m_op_index
+ adjust
)
20868 % m_line_header
->maximum_ops_per_instruction
);
20871 /* Return non-zero if we should add LINE to the line number table.
20872 LINE is the line to add, LAST_LINE is the last line that was added,
20873 LAST_SUBFILE is the subfile for LAST_LINE.
20874 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20875 had a non-zero discriminator.
20877 We have to be careful in the presence of discriminators.
20878 E.g., for this line:
20880 for (i = 0; i < 100000; i++);
20882 clang can emit four line number entries for that one line,
20883 each with a different discriminator.
20884 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20886 However, we want gdb to coalesce all four entries into one.
20887 Otherwise the user could stepi into the middle of the line and
20888 gdb would get confused about whether the pc really was in the
20889 middle of the line.
20891 Things are further complicated by the fact that two consecutive
20892 line number entries for the same line is a heuristic used by gcc
20893 to denote the end of the prologue. So we can't just discard duplicate
20894 entries, we have to be selective about it. The heuristic we use is
20895 that we only collapse consecutive entries for the same line if at least
20896 one of those entries has a non-zero discriminator. PR 17276.
20898 Note: Addresses in the line number state machine can never go backwards
20899 within one sequence, thus this coalescing is ok. */
20902 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20903 unsigned int line
, unsigned int last_line
,
20904 int line_has_non_zero_discriminator
,
20905 struct subfile
*last_subfile
)
20907 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20909 if (line
!= last_line
)
20911 /* Same line for the same file that we've seen already.
20912 As a last check, for pr 17276, only record the line if the line
20913 has never had a non-zero discriminator. */
20914 if (!line_has_non_zero_discriminator
)
20919 /* Use the CU's builder to record line number LINE beginning at
20920 address ADDRESS in the line table of subfile SUBFILE. */
20923 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20924 unsigned int line
, CORE_ADDR address
,
20925 struct dwarf2_cu
*cu
)
20927 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20929 if (dwarf_line_debug
)
20931 fprintf_unfiltered (gdb_stdlog
,
20932 "Recording line %u, file %s, address %s\n",
20933 line
, lbasename (subfile
->name
),
20934 paddress (gdbarch
, address
));
20938 cu
->get_builder ()->record_line (subfile
, line
, addr
);
20941 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20942 Mark the end of a set of line number records.
20943 The arguments are the same as for dwarf_record_line_1.
20944 If SUBFILE is NULL the request is ignored. */
20947 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20948 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20950 if (subfile
== NULL
)
20953 if (dwarf_line_debug
)
20955 fprintf_unfiltered (gdb_stdlog
,
20956 "Finishing current line, file %s, address %s\n",
20957 lbasename (subfile
->name
),
20958 paddress (gdbarch
, address
));
20961 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, cu
);
20965 lnp_state_machine::record_line (bool end_sequence
)
20967 if (dwarf_line_debug
)
20969 fprintf_unfiltered (gdb_stdlog
,
20970 "Processing actual line %u: file %u,"
20971 " address %s, is_stmt %u, discrim %u\n",
20972 m_line
, to_underlying (m_file
),
20973 paddress (m_gdbarch
, m_address
),
20974 m_is_stmt
, m_discriminator
);
20977 file_entry
*fe
= current_file ();
20980 dwarf2_debug_line_missing_file_complaint ();
20981 /* For now we ignore lines not starting on an instruction boundary.
20982 But not when processing end_sequence for compatibility with the
20983 previous version of the code. */
20984 else if (m_op_index
== 0 || end_sequence
)
20986 fe
->included_p
= 1;
20987 if (m_record_lines_p
&& (producer_is_codewarrior (m_cu
) || m_is_stmt
))
20989 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20992 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20993 m_currently_recording_lines
? m_cu
: nullptr);
20998 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20999 m_line_has_non_zero_discriminator
,
21002 buildsym_compunit
*builder
= m_cu
->get_builder ();
21003 dwarf_record_line_1 (m_gdbarch
,
21004 builder
->get_current_subfile (),
21006 m_currently_recording_lines
? m_cu
: nullptr);
21008 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
21009 m_last_line
= m_line
;
21015 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
21016 line_header
*lh
, bool record_lines_p
)
21020 m_record_lines_p
= record_lines_p
;
21021 m_line_header
= lh
;
21023 m_currently_recording_lines
= true;
21025 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
21026 was a line entry for it so that the backend has a chance to adjust it
21027 and also record it in case it needs it. This is currently used by MIPS
21028 code, cf. `mips_adjust_dwarf2_line'. */
21029 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
21030 m_is_stmt
= lh
->default_is_stmt
;
21031 m_discriminator
= 0;
21035 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
21036 const gdb_byte
*line_ptr
,
21037 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
21039 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
21040 the pc range of the CU. However, we restrict the test to only ADDRESS
21041 values of zero to preserve GDB's previous behaviour which is to handle
21042 the specific case of a function being GC'd by the linker. */
21044 if (address
== 0 && address
< unrelocated_lowpc
)
21046 /* This line table is for a function which has been
21047 GCd by the linker. Ignore it. PR gdb/12528 */
21049 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21050 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
21052 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
21053 line_offset
, objfile_name (objfile
));
21054 m_currently_recording_lines
= false;
21055 /* Note: m_currently_recording_lines is left as false until we see
21056 DW_LNE_end_sequence. */
21060 /* Subroutine of dwarf_decode_lines to simplify it.
21061 Process the line number information in LH.
21062 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
21063 program in order to set included_p for every referenced header. */
21066 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
21067 const int decode_for_pst_p
, CORE_ADDR lowpc
)
21069 const gdb_byte
*line_ptr
, *extended_end
;
21070 const gdb_byte
*line_end
;
21071 unsigned int bytes_read
, extended_len
;
21072 unsigned char op_code
, extended_op
;
21073 CORE_ADDR baseaddr
;
21074 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21075 bfd
*abfd
= objfile
->obfd
;
21076 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21077 /* True if we're recording line info (as opposed to building partial
21078 symtabs and just interested in finding include files mentioned by
21079 the line number program). */
21080 bool record_lines_p
= !decode_for_pst_p
;
21082 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21084 line_ptr
= lh
->statement_program_start
;
21085 line_end
= lh
->statement_program_end
;
21087 /* Read the statement sequences until there's nothing left. */
21088 while (line_ptr
< line_end
)
21090 /* The DWARF line number program state machine. Reset the state
21091 machine at the start of each sequence. */
21092 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
21093 bool end_sequence
= false;
21095 if (record_lines_p
)
21097 /* Start a subfile for the current file of the state
21099 const file_entry
*fe
= state_machine
.current_file ();
21102 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
21105 /* Decode the table. */
21106 while (line_ptr
< line_end
&& !end_sequence
)
21108 op_code
= read_1_byte (abfd
, line_ptr
);
21111 if (op_code
>= lh
->opcode_base
)
21113 /* Special opcode. */
21114 state_machine
.handle_special_opcode (op_code
);
21116 else switch (op_code
)
21118 case DW_LNS_extended_op
:
21119 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
21121 line_ptr
+= bytes_read
;
21122 extended_end
= line_ptr
+ extended_len
;
21123 extended_op
= read_1_byte (abfd
, line_ptr
);
21125 switch (extended_op
)
21127 case DW_LNE_end_sequence
:
21128 state_machine
.handle_end_sequence ();
21129 end_sequence
= true;
21131 case DW_LNE_set_address
:
21134 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
21135 line_ptr
+= bytes_read
;
21137 state_machine
.check_line_address (cu
, line_ptr
,
21138 lowpc
- baseaddr
, address
);
21139 state_machine
.handle_set_address (baseaddr
, address
);
21142 case DW_LNE_define_file
:
21144 const char *cur_file
;
21145 unsigned int mod_time
, length
;
21148 cur_file
= read_direct_string (abfd
, line_ptr
,
21150 line_ptr
+= bytes_read
;
21151 dindex
= (dir_index
)
21152 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21153 line_ptr
+= bytes_read
;
21155 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21156 line_ptr
+= bytes_read
;
21158 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21159 line_ptr
+= bytes_read
;
21160 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
21163 case DW_LNE_set_discriminator
:
21165 /* The discriminator is not interesting to the
21166 debugger; just ignore it. We still need to
21167 check its value though:
21168 if there are consecutive entries for the same
21169 (non-prologue) line we want to coalesce them.
21172 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21173 line_ptr
+= bytes_read
;
21175 state_machine
.handle_set_discriminator (discr
);
21179 complaint (_("mangled .debug_line section"));
21182 /* Make sure that we parsed the extended op correctly. If e.g.
21183 we expected a different address size than the producer used,
21184 we may have read the wrong number of bytes. */
21185 if (line_ptr
!= extended_end
)
21187 complaint (_("mangled .debug_line section"));
21192 state_machine
.handle_copy ();
21194 case DW_LNS_advance_pc
:
21197 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21198 line_ptr
+= bytes_read
;
21200 state_machine
.handle_advance_pc (adjust
);
21203 case DW_LNS_advance_line
:
21206 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
21207 line_ptr
+= bytes_read
;
21209 state_machine
.handle_advance_line (line_delta
);
21212 case DW_LNS_set_file
:
21214 file_name_index file
21215 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
21217 line_ptr
+= bytes_read
;
21219 state_machine
.handle_set_file (file
);
21222 case DW_LNS_set_column
:
21223 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21224 line_ptr
+= bytes_read
;
21226 case DW_LNS_negate_stmt
:
21227 state_machine
.handle_negate_stmt ();
21229 case DW_LNS_set_basic_block
:
21231 /* Add to the address register of the state machine the
21232 address increment value corresponding to special opcode
21233 255. I.e., this value is scaled by the minimum
21234 instruction length since special opcode 255 would have
21235 scaled the increment. */
21236 case DW_LNS_const_add_pc
:
21237 state_machine
.handle_const_add_pc ();
21239 case DW_LNS_fixed_advance_pc
:
21241 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
21244 state_machine
.handle_fixed_advance_pc (addr_adj
);
21249 /* Unknown standard opcode, ignore it. */
21252 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
21254 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21255 line_ptr
+= bytes_read
;
21262 dwarf2_debug_line_missing_end_sequence_complaint ();
21264 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
21265 in which case we still finish recording the last line). */
21266 state_machine
.record_line (true);
21270 /* Decode the Line Number Program (LNP) for the given line_header
21271 structure and CU. The actual information extracted and the type
21272 of structures created from the LNP depends on the value of PST.
21274 1. If PST is NULL, then this procedure uses the data from the program
21275 to create all necessary symbol tables, and their linetables.
21277 2. If PST is not NULL, this procedure reads the program to determine
21278 the list of files included by the unit represented by PST, and
21279 builds all the associated partial symbol tables.
21281 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21282 It is used for relative paths in the line table.
21283 NOTE: When processing partial symtabs (pst != NULL),
21284 comp_dir == pst->dirname.
21286 NOTE: It is important that psymtabs have the same file name (via strcmp)
21287 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21288 symtab we don't use it in the name of the psymtabs we create.
21289 E.g. expand_line_sal requires this when finding psymtabs to expand.
21290 A good testcase for this is mb-inline.exp.
21292 LOWPC is the lowest address in CU (or 0 if not known).
21294 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21295 for its PC<->lines mapping information. Otherwise only the filename
21296 table is read in. */
21299 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21300 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
21301 CORE_ADDR lowpc
, int decode_mapping
)
21303 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21304 const int decode_for_pst_p
= (pst
!= NULL
);
21306 if (decode_mapping
)
21307 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21309 if (decode_for_pst_p
)
21313 /* Now that we're done scanning the Line Header Program, we can
21314 create the psymtab of each included file. */
21315 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
21316 if (lh
->file_names
[file_index
].included_p
== 1)
21318 gdb::unique_xmalloc_ptr
<char> name_holder
;
21319 const char *include_name
=
21320 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
21322 if (include_name
!= NULL
)
21323 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21328 /* Make sure a symtab is created for every file, even files
21329 which contain only variables (i.e. no code with associated
21331 buildsym_compunit
*builder
= cu
->get_builder ();
21332 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
21335 for (i
= 0; i
< lh
->file_names
.size (); i
++)
21337 file_entry
&fe
= lh
->file_names
[i
];
21339 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
21341 if (builder
->get_current_subfile ()->symtab
== NULL
)
21343 builder
->get_current_subfile ()->symtab
21344 = allocate_symtab (cust
,
21345 builder
->get_current_subfile ()->name
);
21347 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
21352 /* Start a subfile for DWARF. FILENAME is the name of the file and
21353 DIRNAME the name of the source directory which contains FILENAME
21354 or NULL if not known.
21355 This routine tries to keep line numbers from identical absolute and
21356 relative file names in a common subfile.
21358 Using the `list' example from the GDB testsuite, which resides in
21359 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21360 of /srcdir/list0.c yields the following debugging information for list0.c:
21362 DW_AT_name: /srcdir/list0.c
21363 DW_AT_comp_dir: /compdir
21364 files.files[0].name: list0.h
21365 files.files[0].dir: /srcdir
21366 files.files[1].name: list0.c
21367 files.files[1].dir: /srcdir
21369 The line number information for list0.c has to end up in a single
21370 subfile, so that `break /srcdir/list0.c:1' works as expected.
21371 start_subfile will ensure that this happens provided that we pass the
21372 concatenation of files.files[1].dir and files.files[1].name as the
21376 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
21377 const char *dirname
)
21381 /* In order not to lose the line information directory,
21382 we concatenate it to the filename when it makes sense.
21383 Note that the Dwarf3 standard says (speaking of filenames in line
21384 information): ``The directory index is ignored for file names
21385 that represent full path names''. Thus ignoring dirname in the
21386 `else' branch below isn't an issue. */
21388 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21390 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21394 cu
->get_builder ()->start_subfile (filename
);
21400 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
21401 buildsym_compunit constructor. */
21403 struct compunit_symtab
*
21404 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
21407 gdb_assert (m_builder
== nullptr);
21409 m_builder
.reset (new struct buildsym_compunit
21410 (per_cu
->dwarf2_per_objfile
->objfile
,
21411 name
, comp_dir
, language
, low_pc
));
21413 list_in_scope
= get_builder ()->get_file_symbols ();
21415 get_builder ()->record_debugformat ("DWARF 2");
21416 get_builder ()->record_producer (producer
);
21418 processing_has_namespace_info
= false;
21420 return get_builder ()->get_compunit_symtab ();
21424 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21425 struct dwarf2_cu
*cu
)
21427 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21428 struct comp_unit_head
*cu_header
= &cu
->header
;
21430 /* NOTE drow/2003-01-30: There used to be a comment and some special
21431 code here to turn a symbol with DW_AT_external and a
21432 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21433 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21434 with some versions of binutils) where shared libraries could have
21435 relocations against symbols in their debug information - the
21436 minimal symbol would have the right address, but the debug info
21437 would not. It's no longer necessary, because we will explicitly
21438 apply relocations when we read in the debug information now. */
21440 /* A DW_AT_location attribute with no contents indicates that a
21441 variable has been optimized away. */
21442 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21444 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21448 /* Handle one degenerate form of location expression specially, to
21449 preserve GDB's previous behavior when section offsets are
21450 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
21451 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
21453 if (attr_form_is_block (attr
)
21454 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21455 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21456 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21457 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
21458 && (DW_BLOCK (attr
)->size
21459 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21461 unsigned int dummy
;
21463 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21464 SYMBOL_VALUE_ADDRESS (sym
) =
21465 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21467 SYMBOL_VALUE_ADDRESS (sym
) =
21468 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21469 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21470 fixup_symbol_section (sym
, objfile
);
21471 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21472 SYMBOL_SECTION (sym
));
21476 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21477 expression evaluator, and use LOC_COMPUTED only when necessary
21478 (i.e. when the value of a register or memory location is
21479 referenced, or a thread-local block, etc.). Then again, it might
21480 not be worthwhile. I'm assuming that it isn't unless performance
21481 or memory numbers show me otherwise. */
21483 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21485 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21486 cu
->has_loclist
= true;
21489 /* Given a pointer to a DWARF information entry, figure out if we need
21490 to make a symbol table entry for it, and if so, create a new entry
21491 and return a pointer to it.
21492 If TYPE is NULL, determine symbol type from the die, otherwise
21493 used the passed type.
21494 If SPACE is not NULL, use it to hold the new symbol. If it is
21495 NULL, allocate a new symbol on the objfile's obstack. */
21497 static struct symbol
*
21498 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21499 struct symbol
*space
)
21501 struct dwarf2_per_objfile
*dwarf2_per_objfile
21502 = cu
->per_cu
->dwarf2_per_objfile
;
21503 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21504 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21505 struct symbol
*sym
= NULL
;
21507 struct attribute
*attr
= NULL
;
21508 struct attribute
*attr2
= NULL
;
21509 CORE_ADDR baseaddr
;
21510 struct pending
**list_to_add
= NULL
;
21512 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21514 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21516 name
= dwarf2_name (die
, cu
);
21519 const char *linkagename
;
21520 int suppress_add
= 0;
21525 sym
= allocate_symbol (objfile
);
21526 OBJSTAT (objfile
, n_syms
++);
21528 /* Cache this symbol's name and the name's demangled form (if any). */
21529 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21530 linkagename
= dwarf2_physname (name
, die
, cu
);
21531 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21533 /* Fortran does not have mangling standard and the mangling does differ
21534 between gfortran, iFort etc. */
21535 if (cu
->language
== language_fortran
21536 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21537 symbol_set_demangled_name (&(sym
->ginfo
),
21538 dwarf2_full_name (name
, die
, cu
),
21541 /* Default assumptions.
21542 Use the passed type or decode it from the die. */
21543 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21544 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21546 SYMBOL_TYPE (sym
) = type
;
21548 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21549 attr
= dwarf2_attr (die
,
21550 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21554 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21557 attr
= dwarf2_attr (die
,
21558 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21562 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21563 struct file_entry
*fe
;
21565 if (cu
->line_header
!= NULL
)
21566 fe
= cu
->line_header
->file_name_at (file_index
);
21571 complaint (_("file index out of range"));
21573 symbol_set_symtab (sym
, fe
->symtab
);
21579 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21584 addr
= attr_value_as_address (attr
);
21585 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21586 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21588 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21589 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21590 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21591 add_symbol_to_list (sym
, cu
->list_in_scope
);
21593 case DW_TAG_subprogram
:
21594 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21596 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21597 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21598 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21599 || cu
->language
== language_ada
)
21601 /* Subprograms marked external are stored as a global symbol.
21602 Ada subprograms, whether marked external or not, are always
21603 stored as a global symbol, because we want to be able to
21604 access them globally. For instance, we want to be able
21605 to break on a nested subprogram without having to
21606 specify the context. */
21607 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21611 list_to_add
= cu
->list_in_scope
;
21614 case DW_TAG_inlined_subroutine
:
21615 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21617 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21618 SYMBOL_INLINED (sym
) = 1;
21619 list_to_add
= cu
->list_in_scope
;
21621 case DW_TAG_template_value_param
:
21623 /* Fall through. */
21624 case DW_TAG_constant
:
21625 case DW_TAG_variable
:
21626 case DW_TAG_member
:
21627 /* Compilation with minimal debug info may result in
21628 variables with missing type entries. Change the
21629 misleading `void' type to something sensible. */
21630 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21631 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21633 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21634 /* In the case of DW_TAG_member, we should only be called for
21635 static const members. */
21636 if (die
->tag
== DW_TAG_member
)
21638 /* dwarf2_add_field uses die_is_declaration,
21639 so we do the same. */
21640 gdb_assert (die_is_declaration (die
, cu
));
21645 dwarf2_const_value (attr
, sym
, cu
);
21646 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21649 if (attr2
&& (DW_UNSND (attr2
) != 0))
21650 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21652 list_to_add
= cu
->list_in_scope
;
21656 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21659 var_decode_location (attr
, sym
, cu
);
21660 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21662 /* Fortran explicitly imports any global symbols to the local
21663 scope by DW_TAG_common_block. */
21664 if (cu
->language
== language_fortran
&& die
->parent
21665 && die
->parent
->tag
== DW_TAG_common_block
)
21668 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21669 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21670 && !dwarf2_per_objfile
->has_section_at_zero
)
21672 /* When a static variable is eliminated by the linker,
21673 the corresponding debug information is not stripped
21674 out, but the variable address is set to null;
21675 do not add such variables into symbol table. */
21677 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21679 /* Workaround gfortran PR debug/40040 - it uses
21680 DW_AT_location for variables in -fPIC libraries which may
21681 get overriden by other libraries/executable and get
21682 a different address. Resolve it by the minimal symbol
21683 which may come from inferior's executable using copy
21684 relocation. Make this workaround only for gfortran as for
21685 other compilers GDB cannot guess the minimal symbol
21686 Fortran mangling kind. */
21687 if (cu
->language
== language_fortran
&& die
->parent
21688 && die
->parent
->tag
== DW_TAG_module
21690 && startswith (cu
->producer
, "GNU Fortran"))
21691 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21693 /* A variable with DW_AT_external is never static,
21694 but it may be block-scoped. */
21696 = ((cu
->list_in_scope
21697 == cu
->get_builder ()->get_file_symbols ())
21698 ? cu
->get_builder ()->get_global_symbols ()
21699 : cu
->list_in_scope
);
21702 list_to_add
= cu
->list_in_scope
;
21706 /* We do not know the address of this symbol.
21707 If it is an external symbol and we have type information
21708 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21709 The address of the variable will then be determined from
21710 the minimal symbol table whenever the variable is
21712 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21714 /* Fortran explicitly imports any global symbols to the local
21715 scope by DW_TAG_common_block. */
21716 if (cu
->language
== language_fortran
&& die
->parent
21717 && die
->parent
->tag
== DW_TAG_common_block
)
21719 /* SYMBOL_CLASS doesn't matter here because
21720 read_common_block is going to reset it. */
21722 list_to_add
= cu
->list_in_scope
;
21724 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21725 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21727 /* A variable with DW_AT_external is never static, but it
21728 may be block-scoped. */
21730 = ((cu
->list_in_scope
21731 == cu
->get_builder ()->get_file_symbols ())
21732 ? cu
->get_builder ()->get_global_symbols ()
21733 : cu
->list_in_scope
);
21735 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21737 else if (!die_is_declaration (die
, cu
))
21739 /* Use the default LOC_OPTIMIZED_OUT class. */
21740 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21742 list_to_add
= cu
->list_in_scope
;
21746 case DW_TAG_formal_parameter
:
21748 /* If we are inside a function, mark this as an argument. If
21749 not, we might be looking at an argument to an inlined function
21750 when we do not have enough information to show inlined frames;
21751 pretend it's a local variable in that case so that the user can
21753 struct context_stack
*curr
21754 = cu
->get_builder ()->get_current_context_stack ();
21755 if (curr
!= nullptr && curr
->name
!= nullptr)
21756 SYMBOL_IS_ARGUMENT (sym
) = 1;
21757 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21760 var_decode_location (attr
, sym
, cu
);
21762 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21765 dwarf2_const_value (attr
, sym
, cu
);
21768 list_to_add
= cu
->list_in_scope
;
21771 case DW_TAG_unspecified_parameters
:
21772 /* From varargs functions; gdb doesn't seem to have any
21773 interest in this information, so just ignore it for now.
21776 case DW_TAG_template_type_param
:
21778 /* Fall through. */
21779 case DW_TAG_class_type
:
21780 case DW_TAG_interface_type
:
21781 case DW_TAG_structure_type
:
21782 case DW_TAG_union_type
:
21783 case DW_TAG_set_type
:
21784 case DW_TAG_enumeration_type
:
21785 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21786 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21789 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21790 really ever be static objects: otherwise, if you try
21791 to, say, break of a class's method and you're in a file
21792 which doesn't mention that class, it won't work unless
21793 the check for all static symbols in lookup_symbol_aux
21794 saves you. See the OtherFileClass tests in
21795 gdb.c++/namespace.exp. */
21799 buildsym_compunit
*builder
= cu
->get_builder ();
21801 = (cu
->list_in_scope
== builder
->get_file_symbols ()
21802 && cu
->language
== language_cplus
21803 ? builder
->get_global_symbols ()
21804 : cu
->list_in_scope
);
21806 /* The semantics of C++ state that "struct foo {
21807 ... }" also defines a typedef for "foo". */
21808 if (cu
->language
== language_cplus
21809 || cu
->language
== language_ada
21810 || cu
->language
== language_d
21811 || cu
->language
== language_rust
)
21813 /* The symbol's name is already allocated along
21814 with this objfile, so we don't need to
21815 duplicate it for the type. */
21816 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21817 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21822 case DW_TAG_typedef
:
21823 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21824 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21825 list_to_add
= cu
->list_in_scope
;
21827 case DW_TAG_base_type
:
21828 case DW_TAG_subrange_type
:
21829 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21830 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21831 list_to_add
= cu
->list_in_scope
;
21833 case DW_TAG_enumerator
:
21834 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21837 dwarf2_const_value (attr
, sym
, cu
);
21840 /* NOTE: carlton/2003-11-10: See comment above in the
21841 DW_TAG_class_type, etc. block. */
21844 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
21845 && cu
->language
== language_cplus
21846 ? cu
->get_builder ()->get_global_symbols ()
21847 : cu
->list_in_scope
);
21850 case DW_TAG_imported_declaration
:
21851 case DW_TAG_namespace
:
21852 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21853 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21855 case DW_TAG_module
:
21856 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21857 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21858 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21860 case DW_TAG_common_block
:
21861 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21862 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21863 add_symbol_to_list (sym
, cu
->list_in_scope
);
21866 /* Not a tag we recognize. Hopefully we aren't processing
21867 trash data, but since we must specifically ignore things
21868 we don't recognize, there is nothing else we should do at
21870 complaint (_("unsupported tag: '%s'"),
21871 dwarf_tag_name (die
->tag
));
21877 sym
->hash_next
= objfile
->template_symbols
;
21878 objfile
->template_symbols
= sym
;
21879 list_to_add
= NULL
;
21882 if (list_to_add
!= NULL
)
21883 add_symbol_to_list (sym
, list_to_add
);
21885 /* For the benefit of old versions of GCC, check for anonymous
21886 namespaces based on the demangled name. */
21887 if (!cu
->processing_has_namespace_info
21888 && cu
->language
== language_cplus
)
21889 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21894 /* Given an attr with a DW_FORM_dataN value in host byte order,
21895 zero-extend it as appropriate for the symbol's type. The DWARF
21896 standard (v4) is not entirely clear about the meaning of using
21897 DW_FORM_dataN for a constant with a signed type, where the type is
21898 wider than the data. The conclusion of a discussion on the DWARF
21899 list was that this is unspecified. We choose to always zero-extend
21900 because that is the interpretation long in use by GCC. */
21903 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21904 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21906 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21907 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21908 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21909 LONGEST l
= DW_UNSND (attr
);
21911 if (bits
< sizeof (*value
) * 8)
21913 l
&= ((LONGEST
) 1 << bits
) - 1;
21916 else if (bits
== sizeof (*value
) * 8)
21920 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21921 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21928 /* Read a constant value from an attribute. Either set *VALUE, or if
21929 the value does not fit in *VALUE, set *BYTES - either already
21930 allocated on the objfile obstack, or newly allocated on OBSTACK,
21931 or, set *BATON, if we translated the constant to a location
21935 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21936 const char *name
, struct obstack
*obstack
,
21937 struct dwarf2_cu
*cu
,
21938 LONGEST
*value
, const gdb_byte
**bytes
,
21939 struct dwarf2_locexpr_baton
**baton
)
21941 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21942 struct comp_unit_head
*cu_header
= &cu
->header
;
21943 struct dwarf_block
*blk
;
21944 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21945 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21951 switch (attr
->form
)
21954 case DW_FORM_addrx
:
21955 case DW_FORM_GNU_addr_index
:
21959 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21960 dwarf2_const_value_length_mismatch_complaint (name
,
21961 cu_header
->addr_size
,
21962 TYPE_LENGTH (type
));
21963 /* Symbols of this form are reasonably rare, so we just
21964 piggyback on the existing location code rather than writing
21965 a new implementation of symbol_computed_ops. */
21966 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21967 (*baton
)->per_cu
= cu
->per_cu
;
21968 gdb_assert ((*baton
)->per_cu
);
21970 (*baton
)->size
= 2 + cu_header
->addr_size
;
21971 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21972 (*baton
)->data
= data
;
21974 data
[0] = DW_OP_addr
;
21975 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21976 byte_order
, DW_ADDR (attr
));
21977 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21980 case DW_FORM_string
:
21983 case DW_FORM_GNU_str_index
:
21984 case DW_FORM_GNU_strp_alt
:
21985 /* DW_STRING is already allocated on the objfile obstack, point
21987 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21989 case DW_FORM_block1
:
21990 case DW_FORM_block2
:
21991 case DW_FORM_block4
:
21992 case DW_FORM_block
:
21993 case DW_FORM_exprloc
:
21994 case DW_FORM_data16
:
21995 blk
= DW_BLOCK (attr
);
21996 if (TYPE_LENGTH (type
) != blk
->size
)
21997 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21998 TYPE_LENGTH (type
));
21999 *bytes
= blk
->data
;
22002 /* The DW_AT_const_value attributes are supposed to carry the
22003 symbol's value "represented as it would be on the target
22004 architecture." By the time we get here, it's already been
22005 converted to host endianness, so we just need to sign- or
22006 zero-extend it as appropriate. */
22007 case DW_FORM_data1
:
22008 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
22010 case DW_FORM_data2
:
22011 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
22013 case DW_FORM_data4
:
22014 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
22016 case DW_FORM_data8
:
22017 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
22020 case DW_FORM_sdata
:
22021 case DW_FORM_implicit_const
:
22022 *value
= DW_SND (attr
);
22025 case DW_FORM_udata
:
22026 *value
= DW_UNSND (attr
);
22030 complaint (_("unsupported const value attribute form: '%s'"),
22031 dwarf_form_name (attr
->form
));
22038 /* Copy constant value from an attribute to a symbol. */
22041 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
22042 struct dwarf2_cu
*cu
)
22044 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22046 const gdb_byte
*bytes
;
22047 struct dwarf2_locexpr_baton
*baton
;
22049 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
22050 SYMBOL_PRINT_NAME (sym
),
22051 &objfile
->objfile_obstack
, cu
,
22052 &value
, &bytes
, &baton
);
22056 SYMBOL_LOCATION_BATON (sym
) = baton
;
22057 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
22059 else if (bytes
!= NULL
)
22061 SYMBOL_VALUE_BYTES (sym
) = bytes
;
22062 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
22066 SYMBOL_VALUE (sym
) = value
;
22067 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
22071 /* Return the type of the die in question using its DW_AT_type attribute. */
22073 static struct type
*
22074 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22076 struct attribute
*type_attr
;
22078 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
22081 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22082 /* A missing DW_AT_type represents a void type. */
22083 return objfile_type (objfile
)->builtin_void
;
22086 return lookup_die_type (die
, type_attr
, cu
);
22089 /* True iff CU's producer generates GNAT Ada auxiliary information
22090 that allows to find parallel types through that information instead
22091 of having to do expensive parallel lookups by type name. */
22094 need_gnat_info (struct dwarf2_cu
*cu
)
22096 /* Assume that the Ada compiler was GNAT, which always produces
22097 the auxiliary information. */
22098 return (cu
->language
== language_ada
);
22101 /* Return the auxiliary type of the die in question using its
22102 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
22103 attribute is not present. */
22105 static struct type
*
22106 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22108 struct attribute
*type_attr
;
22110 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
22114 return lookup_die_type (die
, type_attr
, cu
);
22117 /* If DIE has a descriptive_type attribute, then set the TYPE's
22118 descriptive type accordingly. */
22121 set_descriptive_type (struct type
*type
, struct die_info
*die
,
22122 struct dwarf2_cu
*cu
)
22124 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
22126 if (descriptive_type
)
22128 ALLOCATE_GNAT_AUX_TYPE (type
);
22129 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
22133 /* Return the containing type of the die in question using its
22134 DW_AT_containing_type attribute. */
22136 static struct type
*
22137 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22139 struct attribute
*type_attr
;
22140 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22142 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
22144 error (_("Dwarf Error: Problem turning containing type into gdb type "
22145 "[in module %s]"), objfile_name (objfile
));
22147 return lookup_die_type (die
, type_attr
, cu
);
22150 /* Return an error marker type to use for the ill formed type in DIE/CU. */
22152 static struct type
*
22153 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
22155 struct dwarf2_per_objfile
*dwarf2_per_objfile
22156 = cu
->per_cu
->dwarf2_per_objfile
;
22157 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22160 std::string message
22161 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
22162 objfile_name (objfile
),
22163 sect_offset_str (cu
->header
.sect_off
),
22164 sect_offset_str (die
->sect_off
));
22165 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
22166 message
.c_str (), message
.length ());
22168 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
22171 /* Look up the type of DIE in CU using its type attribute ATTR.
22172 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
22173 DW_AT_containing_type.
22174 If there is no type substitute an error marker. */
22176 static struct type
*
22177 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
22178 struct dwarf2_cu
*cu
)
22180 struct dwarf2_per_objfile
*dwarf2_per_objfile
22181 = cu
->per_cu
->dwarf2_per_objfile
;
22182 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22183 struct type
*this_type
;
22185 gdb_assert (attr
->name
== DW_AT_type
22186 || attr
->name
== DW_AT_GNAT_descriptive_type
22187 || attr
->name
== DW_AT_containing_type
);
22189 /* First see if we have it cached. */
22191 if (attr
->form
== DW_FORM_GNU_ref_alt
)
22193 struct dwarf2_per_cu_data
*per_cu
;
22194 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22196 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
22197 dwarf2_per_objfile
);
22198 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
22200 else if (attr_form_is_ref (attr
))
22202 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22204 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
22206 else if (attr
->form
== DW_FORM_ref_sig8
)
22208 ULONGEST signature
= DW_SIGNATURE (attr
);
22210 return get_signatured_type (die
, signature
, cu
);
22214 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
22215 " at %s [in module %s]"),
22216 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
22217 objfile_name (objfile
));
22218 return build_error_marker_type (cu
, die
);
22221 /* If not cached we need to read it in. */
22223 if (this_type
== NULL
)
22225 struct die_info
*type_die
= NULL
;
22226 struct dwarf2_cu
*type_cu
= cu
;
22228 if (attr_form_is_ref (attr
))
22229 type_die
= follow_die_ref (die
, attr
, &type_cu
);
22230 if (type_die
== NULL
)
22231 return build_error_marker_type (cu
, die
);
22232 /* If we find the type now, it's probably because the type came
22233 from an inter-CU reference and the type's CU got expanded before
22235 this_type
= read_type_die (type_die
, type_cu
);
22238 /* If we still don't have a type use an error marker. */
22240 if (this_type
== NULL
)
22241 return build_error_marker_type (cu
, die
);
22246 /* Return the type in DIE, CU.
22247 Returns NULL for invalid types.
22249 This first does a lookup in die_type_hash,
22250 and only reads the die in if necessary.
22252 NOTE: This can be called when reading in partial or full symbols. */
22254 static struct type
*
22255 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
22257 struct type
*this_type
;
22259 this_type
= get_die_type (die
, cu
);
22263 return read_type_die_1 (die
, cu
);
22266 /* Read the type in DIE, CU.
22267 Returns NULL for invalid types. */
22269 static struct type
*
22270 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
22272 struct type
*this_type
= NULL
;
22276 case DW_TAG_class_type
:
22277 case DW_TAG_interface_type
:
22278 case DW_TAG_structure_type
:
22279 case DW_TAG_union_type
:
22280 this_type
= read_structure_type (die
, cu
);
22282 case DW_TAG_enumeration_type
:
22283 this_type
= read_enumeration_type (die
, cu
);
22285 case DW_TAG_subprogram
:
22286 case DW_TAG_subroutine_type
:
22287 case DW_TAG_inlined_subroutine
:
22288 this_type
= read_subroutine_type (die
, cu
);
22290 case DW_TAG_array_type
:
22291 this_type
= read_array_type (die
, cu
);
22293 case DW_TAG_set_type
:
22294 this_type
= read_set_type (die
, cu
);
22296 case DW_TAG_pointer_type
:
22297 this_type
= read_tag_pointer_type (die
, cu
);
22299 case DW_TAG_ptr_to_member_type
:
22300 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22302 case DW_TAG_reference_type
:
22303 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22305 case DW_TAG_rvalue_reference_type
:
22306 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22308 case DW_TAG_const_type
:
22309 this_type
= read_tag_const_type (die
, cu
);
22311 case DW_TAG_volatile_type
:
22312 this_type
= read_tag_volatile_type (die
, cu
);
22314 case DW_TAG_restrict_type
:
22315 this_type
= read_tag_restrict_type (die
, cu
);
22317 case DW_TAG_string_type
:
22318 this_type
= read_tag_string_type (die
, cu
);
22320 case DW_TAG_typedef
:
22321 this_type
= read_typedef (die
, cu
);
22323 case DW_TAG_subrange_type
:
22324 this_type
= read_subrange_type (die
, cu
);
22326 case DW_TAG_base_type
:
22327 this_type
= read_base_type (die
, cu
);
22329 case DW_TAG_unspecified_type
:
22330 this_type
= read_unspecified_type (die
, cu
);
22332 case DW_TAG_namespace
:
22333 this_type
= read_namespace_type (die
, cu
);
22335 case DW_TAG_module
:
22336 this_type
= read_module_type (die
, cu
);
22338 case DW_TAG_atomic_type
:
22339 this_type
= read_tag_atomic_type (die
, cu
);
22342 complaint (_("unexpected tag in read_type_die: '%s'"),
22343 dwarf_tag_name (die
->tag
));
22350 /* See if we can figure out if the class lives in a namespace. We do
22351 this by looking for a member function; its demangled name will
22352 contain namespace info, if there is any.
22353 Return the computed name or NULL.
22354 Space for the result is allocated on the objfile's obstack.
22355 This is the full-die version of guess_partial_die_structure_name.
22356 In this case we know DIE has no useful parent. */
22359 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22361 struct die_info
*spec_die
;
22362 struct dwarf2_cu
*spec_cu
;
22363 struct die_info
*child
;
22364 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22367 spec_die
= die_specification (die
, &spec_cu
);
22368 if (spec_die
!= NULL
)
22374 for (child
= die
->child
;
22376 child
= child
->sibling
)
22378 if (child
->tag
== DW_TAG_subprogram
)
22380 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22382 if (linkage_name
!= NULL
)
22385 = language_class_name_from_physname (cu
->language_defn
,
22389 if (actual_name
!= NULL
)
22391 const char *die_name
= dwarf2_name (die
, cu
);
22393 if (die_name
!= NULL
22394 && strcmp (die_name
, actual_name
) != 0)
22396 /* Strip off the class name from the full name.
22397 We want the prefix. */
22398 int die_name_len
= strlen (die_name
);
22399 int actual_name_len
= strlen (actual_name
);
22401 /* Test for '::' as a sanity check. */
22402 if (actual_name_len
> die_name_len
+ 2
22403 && actual_name
[actual_name_len
22404 - die_name_len
- 1] == ':')
22405 name
= (char *) obstack_copy0 (
22406 &objfile
->per_bfd
->storage_obstack
,
22407 actual_name
, actual_name_len
- die_name_len
- 2);
22410 xfree (actual_name
);
22419 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22420 prefix part in such case. See
22421 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22423 static const char *
22424 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22426 struct attribute
*attr
;
22429 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22430 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22433 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22436 attr
= dw2_linkage_name_attr (die
, cu
);
22437 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22440 /* dwarf2_name had to be already called. */
22441 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22443 /* Strip the base name, keep any leading namespaces/classes. */
22444 base
= strrchr (DW_STRING (attr
), ':');
22445 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22448 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22449 return (char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22451 &base
[-1] - DW_STRING (attr
));
22454 /* Return the name of the namespace/class that DIE is defined within,
22455 or "" if we can't tell. The caller should not xfree the result.
22457 For example, if we're within the method foo() in the following
22467 then determine_prefix on foo's die will return "N::C". */
22469 static const char *
22470 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22472 struct dwarf2_per_objfile
*dwarf2_per_objfile
22473 = cu
->per_cu
->dwarf2_per_objfile
;
22474 struct die_info
*parent
, *spec_die
;
22475 struct dwarf2_cu
*spec_cu
;
22476 struct type
*parent_type
;
22477 const char *retval
;
22479 if (cu
->language
!= language_cplus
22480 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22481 && cu
->language
!= language_rust
)
22484 retval
= anonymous_struct_prefix (die
, cu
);
22488 /* We have to be careful in the presence of DW_AT_specification.
22489 For example, with GCC 3.4, given the code
22493 // Definition of N::foo.
22497 then we'll have a tree of DIEs like this:
22499 1: DW_TAG_compile_unit
22500 2: DW_TAG_namespace // N
22501 3: DW_TAG_subprogram // declaration of N::foo
22502 4: DW_TAG_subprogram // definition of N::foo
22503 DW_AT_specification // refers to die #3
22505 Thus, when processing die #4, we have to pretend that we're in
22506 the context of its DW_AT_specification, namely the contex of die
22509 spec_die
= die_specification (die
, &spec_cu
);
22510 if (spec_die
== NULL
)
22511 parent
= die
->parent
;
22514 parent
= spec_die
->parent
;
22518 if (parent
== NULL
)
22520 else if (parent
->building_fullname
)
22523 const char *parent_name
;
22525 /* It has been seen on RealView 2.2 built binaries,
22526 DW_TAG_template_type_param types actually _defined_ as
22527 children of the parent class:
22530 template class <class Enum> Class{};
22531 Class<enum E> class_e;
22533 1: DW_TAG_class_type (Class)
22534 2: DW_TAG_enumeration_type (E)
22535 3: DW_TAG_enumerator (enum1:0)
22536 3: DW_TAG_enumerator (enum2:1)
22538 2: DW_TAG_template_type_param
22539 DW_AT_type DW_FORM_ref_udata (E)
22541 Besides being broken debug info, it can put GDB into an
22542 infinite loop. Consider:
22544 When we're building the full name for Class<E>, we'll start
22545 at Class, and go look over its template type parameters,
22546 finding E. We'll then try to build the full name of E, and
22547 reach here. We're now trying to build the full name of E,
22548 and look over the parent DIE for containing scope. In the
22549 broken case, if we followed the parent DIE of E, we'd again
22550 find Class, and once again go look at its template type
22551 arguments, etc., etc. Simply don't consider such parent die
22552 as source-level parent of this die (it can't be, the language
22553 doesn't allow it), and break the loop here. */
22554 name
= dwarf2_name (die
, cu
);
22555 parent_name
= dwarf2_name (parent
, cu
);
22556 complaint (_("template param type '%s' defined within parent '%s'"),
22557 name
? name
: "<unknown>",
22558 parent_name
? parent_name
: "<unknown>");
22562 switch (parent
->tag
)
22564 case DW_TAG_namespace
:
22565 parent_type
= read_type_die (parent
, cu
);
22566 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22567 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22568 Work around this problem here. */
22569 if (cu
->language
== language_cplus
22570 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
22572 /* We give a name to even anonymous namespaces. */
22573 return TYPE_NAME (parent_type
);
22574 case DW_TAG_class_type
:
22575 case DW_TAG_interface_type
:
22576 case DW_TAG_structure_type
:
22577 case DW_TAG_union_type
:
22578 case DW_TAG_module
:
22579 parent_type
= read_type_die (parent
, cu
);
22580 if (TYPE_NAME (parent_type
) != NULL
)
22581 return TYPE_NAME (parent_type
);
22583 /* An anonymous structure is only allowed non-static data
22584 members; no typedefs, no member functions, et cetera.
22585 So it does not need a prefix. */
22587 case DW_TAG_compile_unit
:
22588 case DW_TAG_partial_unit
:
22589 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22590 if (cu
->language
== language_cplus
22591 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
22592 && die
->child
!= NULL
22593 && (die
->tag
== DW_TAG_class_type
22594 || die
->tag
== DW_TAG_structure_type
22595 || die
->tag
== DW_TAG_union_type
))
22597 char *name
= guess_full_die_structure_name (die
, cu
);
22602 case DW_TAG_enumeration_type
:
22603 parent_type
= read_type_die (parent
, cu
);
22604 if (TYPE_DECLARED_CLASS (parent_type
))
22606 if (TYPE_NAME (parent_type
) != NULL
)
22607 return TYPE_NAME (parent_type
);
22610 /* Fall through. */
22612 return determine_prefix (parent
, cu
);
22616 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22617 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22618 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22619 an obconcat, otherwise allocate storage for the result. The CU argument is
22620 used to determine the language and hence, the appropriate separator. */
22622 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22625 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22626 int physname
, struct dwarf2_cu
*cu
)
22628 const char *lead
= "";
22631 if (suffix
== NULL
|| suffix
[0] == '\0'
22632 || prefix
== NULL
|| prefix
[0] == '\0')
22634 else if (cu
->language
== language_d
)
22636 /* For D, the 'main' function could be defined in any module, but it
22637 should never be prefixed. */
22638 if (strcmp (suffix
, "D main") == 0)
22646 else if (cu
->language
== language_fortran
&& physname
)
22648 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22649 DW_AT_MIPS_linkage_name is preferred and used instead. */
22657 if (prefix
== NULL
)
22659 if (suffix
== NULL
)
22666 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22668 strcpy (retval
, lead
);
22669 strcat (retval
, prefix
);
22670 strcat (retval
, sep
);
22671 strcat (retval
, suffix
);
22676 /* We have an obstack. */
22677 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22681 /* Return sibling of die, NULL if no sibling. */
22683 static struct die_info
*
22684 sibling_die (struct die_info
*die
)
22686 return die
->sibling
;
22689 /* Get name of a die, return NULL if not found. */
22691 static const char *
22692 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22693 struct obstack
*obstack
)
22695 if (name
&& cu
->language
== language_cplus
)
22697 std::string canon_name
= cp_canonicalize_string (name
);
22699 if (!canon_name
.empty ())
22701 if (canon_name
!= name
)
22702 name
= (const char *) obstack_copy0 (obstack
,
22703 canon_name
.c_str (),
22704 canon_name
.length ());
22711 /* Get name of a die, return NULL if not found.
22712 Anonymous namespaces are converted to their magic string. */
22714 static const char *
22715 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22717 struct attribute
*attr
;
22718 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22720 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22721 if ((!attr
|| !DW_STRING (attr
))
22722 && die
->tag
!= DW_TAG_namespace
22723 && die
->tag
!= DW_TAG_class_type
22724 && die
->tag
!= DW_TAG_interface_type
22725 && die
->tag
!= DW_TAG_structure_type
22726 && die
->tag
!= DW_TAG_union_type
)
22731 case DW_TAG_compile_unit
:
22732 case DW_TAG_partial_unit
:
22733 /* Compilation units have a DW_AT_name that is a filename, not
22734 a source language identifier. */
22735 case DW_TAG_enumeration_type
:
22736 case DW_TAG_enumerator
:
22737 /* These tags always have simple identifiers already; no need
22738 to canonicalize them. */
22739 return DW_STRING (attr
);
22741 case DW_TAG_namespace
:
22742 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22743 return DW_STRING (attr
);
22744 return CP_ANONYMOUS_NAMESPACE_STR
;
22746 case DW_TAG_class_type
:
22747 case DW_TAG_interface_type
:
22748 case DW_TAG_structure_type
:
22749 case DW_TAG_union_type
:
22750 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22751 structures or unions. These were of the form "._%d" in GCC 4.1,
22752 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22753 and GCC 4.4. We work around this problem by ignoring these. */
22754 if (attr
&& DW_STRING (attr
)
22755 && (startswith (DW_STRING (attr
), "._")
22756 || startswith (DW_STRING (attr
), "<anonymous")))
22759 /* GCC might emit a nameless typedef that has a linkage name. See
22760 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22761 if (!attr
|| DW_STRING (attr
) == NULL
)
22763 char *demangled
= NULL
;
22765 attr
= dw2_linkage_name_attr (die
, cu
);
22766 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22769 /* Avoid demangling DW_STRING (attr) the second time on a second
22770 call for the same DIE. */
22771 if (!DW_STRING_IS_CANONICAL (attr
))
22772 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22778 /* FIXME: we already did this for the partial symbol... */
22781 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22782 demangled
, strlen (demangled
)));
22783 DW_STRING_IS_CANONICAL (attr
) = 1;
22786 /* Strip any leading namespaces/classes, keep only the base name.
22787 DW_AT_name for named DIEs does not contain the prefixes. */
22788 base
= strrchr (DW_STRING (attr
), ':');
22789 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22792 return DW_STRING (attr
);
22801 if (!DW_STRING_IS_CANONICAL (attr
))
22804 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22805 &objfile
->per_bfd
->storage_obstack
);
22806 DW_STRING_IS_CANONICAL (attr
) = 1;
22808 return DW_STRING (attr
);
22811 /* Return the die that this die in an extension of, or NULL if there
22812 is none. *EXT_CU is the CU containing DIE on input, and the CU
22813 containing the return value on output. */
22815 static struct die_info
*
22816 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22818 struct attribute
*attr
;
22820 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22824 return follow_die_ref (die
, attr
, ext_cu
);
22827 /* Convert a DIE tag into its string name. */
22829 static const char *
22830 dwarf_tag_name (unsigned tag
)
22832 const char *name
= get_DW_TAG_name (tag
);
22835 return "DW_TAG_<unknown>";
22840 /* Convert a DWARF attribute code into its string name. */
22842 static const char *
22843 dwarf_attr_name (unsigned attr
)
22847 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22848 if (attr
== DW_AT_MIPS_fde
)
22849 return "DW_AT_MIPS_fde";
22851 if (attr
== DW_AT_HP_block_index
)
22852 return "DW_AT_HP_block_index";
22855 name
= get_DW_AT_name (attr
);
22858 return "DW_AT_<unknown>";
22863 /* Convert a DWARF value form code into its string name. */
22865 static const char *
22866 dwarf_form_name (unsigned form
)
22868 const char *name
= get_DW_FORM_name (form
);
22871 return "DW_FORM_<unknown>";
22876 static const char *
22877 dwarf_bool_name (unsigned mybool
)
22885 /* Convert a DWARF type code into its string name. */
22887 static const char *
22888 dwarf_type_encoding_name (unsigned enc
)
22890 const char *name
= get_DW_ATE_name (enc
);
22893 return "DW_ATE_<unknown>";
22899 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22903 print_spaces (indent
, f
);
22904 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22905 dwarf_tag_name (die
->tag
), die
->abbrev
,
22906 sect_offset_str (die
->sect_off
));
22908 if (die
->parent
!= NULL
)
22910 print_spaces (indent
, f
);
22911 fprintf_unfiltered (f
, " parent at offset: %s\n",
22912 sect_offset_str (die
->parent
->sect_off
));
22915 print_spaces (indent
, f
);
22916 fprintf_unfiltered (f
, " has children: %s\n",
22917 dwarf_bool_name (die
->child
!= NULL
));
22919 print_spaces (indent
, f
);
22920 fprintf_unfiltered (f
, " attributes:\n");
22922 for (i
= 0; i
< die
->num_attrs
; ++i
)
22924 print_spaces (indent
, f
);
22925 fprintf_unfiltered (f
, " %s (%s) ",
22926 dwarf_attr_name (die
->attrs
[i
].name
),
22927 dwarf_form_name (die
->attrs
[i
].form
));
22929 switch (die
->attrs
[i
].form
)
22932 case DW_FORM_addrx
:
22933 case DW_FORM_GNU_addr_index
:
22934 fprintf_unfiltered (f
, "address: ");
22935 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22937 case DW_FORM_block2
:
22938 case DW_FORM_block4
:
22939 case DW_FORM_block
:
22940 case DW_FORM_block1
:
22941 fprintf_unfiltered (f
, "block: size %s",
22942 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22944 case DW_FORM_exprloc
:
22945 fprintf_unfiltered (f
, "expression: size %s",
22946 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22948 case DW_FORM_data16
:
22949 fprintf_unfiltered (f
, "constant of 16 bytes");
22951 case DW_FORM_ref_addr
:
22952 fprintf_unfiltered (f
, "ref address: ");
22953 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22955 case DW_FORM_GNU_ref_alt
:
22956 fprintf_unfiltered (f
, "alt ref address: ");
22957 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22963 case DW_FORM_ref_udata
:
22964 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22965 (long) (DW_UNSND (&die
->attrs
[i
])));
22967 case DW_FORM_data1
:
22968 case DW_FORM_data2
:
22969 case DW_FORM_data4
:
22970 case DW_FORM_data8
:
22971 case DW_FORM_udata
:
22972 case DW_FORM_sdata
:
22973 fprintf_unfiltered (f
, "constant: %s",
22974 pulongest (DW_UNSND (&die
->attrs
[i
])));
22976 case DW_FORM_sec_offset
:
22977 fprintf_unfiltered (f
, "section offset: %s",
22978 pulongest (DW_UNSND (&die
->attrs
[i
])));
22980 case DW_FORM_ref_sig8
:
22981 fprintf_unfiltered (f
, "signature: %s",
22982 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22984 case DW_FORM_string
:
22986 case DW_FORM_line_strp
:
22988 case DW_FORM_GNU_str_index
:
22989 case DW_FORM_GNU_strp_alt
:
22990 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22991 DW_STRING (&die
->attrs
[i
])
22992 ? DW_STRING (&die
->attrs
[i
]) : "",
22993 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22996 if (DW_UNSND (&die
->attrs
[i
]))
22997 fprintf_unfiltered (f
, "flag: TRUE");
22999 fprintf_unfiltered (f
, "flag: FALSE");
23001 case DW_FORM_flag_present
:
23002 fprintf_unfiltered (f
, "flag: TRUE");
23004 case DW_FORM_indirect
:
23005 /* The reader will have reduced the indirect form to
23006 the "base form" so this form should not occur. */
23007 fprintf_unfiltered (f
,
23008 "unexpected attribute form: DW_FORM_indirect");
23010 case DW_FORM_implicit_const
:
23011 fprintf_unfiltered (f
, "constant: %s",
23012 plongest (DW_SND (&die
->attrs
[i
])));
23015 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
23016 die
->attrs
[i
].form
);
23019 fprintf_unfiltered (f
, "\n");
23024 dump_die_for_error (struct die_info
*die
)
23026 dump_die_shallow (gdb_stderr
, 0, die
);
23030 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
23032 int indent
= level
* 4;
23034 gdb_assert (die
!= NULL
);
23036 if (level
>= max_level
)
23039 dump_die_shallow (f
, indent
, die
);
23041 if (die
->child
!= NULL
)
23043 print_spaces (indent
, f
);
23044 fprintf_unfiltered (f
, " Children:");
23045 if (level
+ 1 < max_level
)
23047 fprintf_unfiltered (f
, "\n");
23048 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
23052 fprintf_unfiltered (f
,
23053 " [not printed, max nesting level reached]\n");
23057 if (die
->sibling
!= NULL
&& level
> 0)
23059 dump_die_1 (f
, level
, max_level
, die
->sibling
);
23063 /* This is called from the pdie macro in gdbinit.in.
23064 It's not static so gcc will keep a copy callable from gdb. */
23067 dump_die (struct die_info
*die
, int max_level
)
23069 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
23073 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
23077 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
23078 to_underlying (die
->sect_off
),
23084 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
23088 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
23090 if (attr_form_is_ref (attr
))
23091 return (sect_offset
) DW_UNSND (attr
);
23093 complaint (_("unsupported die ref attribute form: '%s'"),
23094 dwarf_form_name (attr
->form
));
23098 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
23099 * the value held by the attribute is not constant. */
23102 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
23104 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
23105 return DW_SND (attr
);
23106 else if (attr
->form
== DW_FORM_udata
23107 || attr
->form
== DW_FORM_data1
23108 || attr
->form
== DW_FORM_data2
23109 || attr
->form
== DW_FORM_data4
23110 || attr
->form
== DW_FORM_data8
)
23111 return DW_UNSND (attr
);
23114 /* For DW_FORM_data16 see attr_form_is_constant. */
23115 complaint (_("Attribute value is not a constant (%s)"),
23116 dwarf_form_name (attr
->form
));
23117 return default_value
;
23121 /* Follow reference or signature attribute ATTR of SRC_DIE.
23122 On entry *REF_CU is the CU of SRC_DIE.
23123 On exit *REF_CU is the CU of the result. */
23125 static struct die_info
*
23126 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23127 struct dwarf2_cu
**ref_cu
)
23129 struct die_info
*die
;
23131 if (attr_form_is_ref (attr
))
23132 die
= follow_die_ref (src_die
, attr
, ref_cu
);
23133 else if (attr
->form
== DW_FORM_ref_sig8
)
23134 die
= follow_die_sig (src_die
, attr
, ref_cu
);
23137 dump_die_for_error (src_die
);
23138 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
23139 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23145 /* Follow reference OFFSET.
23146 On entry *REF_CU is the CU of the source die referencing OFFSET.
23147 On exit *REF_CU is the CU of the result.
23148 Returns NULL if OFFSET is invalid. */
23150 static struct die_info
*
23151 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
23152 struct dwarf2_cu
**ref_cu
)
23154 struct die_info temp_die
;
23155 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
23156 struct dwarf2_per_objfile
*dwarf2_per_objfile
23157 = cu
->per_cu
->dwarf2_per_objfile
;
23159 gdb_assert (cu
->per_cu
!= NULL
);
23163 if (cu
->per_cu
->is_debug_types
)
23165 /* .debug_types CUs cannot reference anything outside their CU.
23166 If they need to, they have to reference a signatured type via
23167 DW_FORM_ref_sig8. */
23168 if (!offset_in_cu_p (&cu
->header
, sect_off
))
23171 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
23172 || !offset_in_cu_p (&cu
->header
, sect_off
))
23174 struct dwarf2_per_cu_data
*per_cu
;
23176 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23177 dwarf2_per_objfile
);
23179 /* If necessary, add it to the queue and load its DIEs. */
23180 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
23181 load_full_comp_unit (per_cu
, false, cu
->language
);
23183 target_cu
= per_cu
->cu
;
23185 else if (cu
->dies
== NULL
)
23187 /* We're loading full DIEs during partial symbol reading. */
23188 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
23189 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
23192 *ref_cu
= target_cu
;
23193 temp_die
.sect_off
= sect_off
;
23195 if (target_cu
!= cu
)
23196 target_cu
->ancestor
= cu
;
23198 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
23200 to_underlying (sect_off
));
23203 /* Follow reference attribute ATTR of SRC_DIE.
23204 On entry *REF_CU is the CU of SRC_DIE.
23205 On exit *REF_CU is the CU of the result. */
23207 static struct die_info
*
23208 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
23209 struct dwarf2_cu
**ref_cu
)
23211 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
23212 struct dwarf2_cu
*cu
= *ref_cu
;
23213 struct die_info
*die
;
23215 die
= follow_die_offset (sect_off
,
23216 (attr
->form
== DW_FORM_GNU_ref_alt
23217 || cu
->per_cu
->is_dwz
),
23220 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
23221 "at %s [in module %s]"),
23222 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
23223 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
23228 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
23229 Returned value is intended for DW_OP_call*. Returned
23230 dwarf2_locexpr_baton->data has lifetime of
23231 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
23233 struct dwarf2_locexpr_baton
23234 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
23235 struct dwarf2_per_cu_data
*per_cu
,
23236 CORE_ADDR (*get_frame_pc
) (void *baton
),
23237 void *baton
, bool resolve_abstract_p
)
23239 struct dwarf2_cu
*cu
;
23240 struct die_info
*die
;
23241 struct attribute
*attr
;
23242 struct dwarf2_locexpr_baton retval
;
23243 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23244 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23246 if (per_cu
->cu
== NULL
)
23247 load_cu (per_cu
, false);
23251 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23252 Instead just throw an error, not much else we can do. */
23253 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23254 sect_offset_str (sect_off
), objfile_name (objfile
));
23257 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23259 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23260 sect_offset_str (sect_off
), objfile_name (objfile
));
23262 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23263 if (!attr
&& resolve_abstract_p
23264 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
)
23265 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
23267 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23269 for (const auto &cand
: dwarf2_per_objfile
->abstract_to_concrete
[die
])
23272 || cand
->parent
->tag
!= DW_TAG_subprogram
)
23275 CORE_ADDR pc_low
, pc_high
;
23276 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
23277 if (pc_low
== ((CORE_ADDR
) -1)
23278 || !(pc_low
<= pc
&& pc
< pc_high
))
23282 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23289 /* DWARF: "If there is no such attribute, then there is no effect.".
23290 DATA is ignored if SIZE is 0. */
23292 retval
.data
= NULL
;
23295 else if (attr_form_is_section_offset (attr
))
23297 struct dwarf2_loclist_baton loclist_baton
;
23298 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23301 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
23303 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
23305 retval
.size
= size
;
23309 if (!attr_form_is_block (attr
))
23310 error (_("Dwarf Error: DIE at %s referenced in module %s "
23311 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23312 sect_offset_str (sect_off
), objfile_name (objfile
));
23314 retval
.data
= DW_BLOCK (attr
)->data
;
23315 retval
.size
= DW_BLOCK (attr
)->size
;
23317 retval
.per_cu
= cu
->per_cu
;
23319 age_cached_comp_units (dwarf2_per_objfile
);
23324 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
23327 struct dwarf2_locexpr_baton
23328 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23329 struct dwarf2_per_cu_data
*per_cu
,
23330 CORE_ADDR (*get_frame_pc
) (void *baton
),
23333 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23335 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
23338 /* Write a constant of a given type as target-ordered bytes into
23341 static const gdb_byte
*
23342 write_constant_as_bytes (struct obstack
*obstack
,
23343 enum bfd_endian byte_order
,
23350 *len
= TYPE_LENGTH (type
);
23351 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23352 store_unsigned_integer (result
, *len
, byte_order
, value
);
23357 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23358 pointer to the constant bytes and set LEN to the length of the
23359 data. If memory is needed, allocate it on OBSTACK. If the DIE
23360 does not have a DW_AT_const_value, return NULL. */
23363 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23364 struct dwarf2_per_cu_data
*per_cu
,
23365 struct obstack
*obstack
,
23368 struct dwarf2_cu
*cu
;
23369 struct die_info
*die
;
23370 struct attribute
*attr
;
23371 const gdb_byte
*result
= NULL
;
23374 enum bfd_endian byte_order
;
23375 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23377 if (per_cu
->cu
== NULL
)
23378 load_cu (per_cu
, false);
23382 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23383 Instead just throw an error, not much else we can do. */
23384 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23385 sect_offset_str (sect_off
), objfile_name (objfile
));
23388 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23390 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23391 sect_offset_str (sect_off
), objfile_name (objfile
));
23393 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23397 byte_order
= (bfd_big_endian (objfile
->obfd
)
23398 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23400 switch (attr
->form
)
23403 case DW_FORM_addrx
:
23404 case DW_FORM_GNU_addr_index
:
23408 *len
= cu
->header
.addr_size
;
23409 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23410 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23414 case DW_FORM_string
:
23417 case DW_FORM_GNU_str_index
:
23418 case DW_FORM_GNU_strp_alt
:
23419 /* DW_STRING is already allocated on the objfile obstack, point
23421 result
= (const gdb_byte
*) DW_STRING (attr
);
23422 *len
= strlen (DW_STRING (attr
));
23424 case DW_FORM_block1
:
23425 case DW_FORM_block2
:
23426 case DW_FORM_block4
:
23427 case DW_FORM_block
:
23428 case DW_FORM_exprloc
:
23429 case DW_FORM_data16
:
23430 result
= DW_BLOCK (attr
)->data
;
23431 *len
= DW_BLOCK (attr
)->size
;
23434 /* The DW_AT_const_value attributes are supposed to carry the
23435 symbol's value "represented as it would be on the target
23436 architecture." By the time we get here, it's already been
23437 converted to host endianness, so we just need to sign- or
23438 zero-extend it as appropriate. */
23439 case DW_FORM_data1
:
23440 type
= die_type (die
, cu
);
23441 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23442 if (result
== NULL
)
23443 result
= write_constant_as_bytes (obstack
, byte_order
,
23446 case DW_FORM_data2
:
23447 type
= die_type (die
, cu
);
23448 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23449 if (result
== NULL
)
23450 result
= write_constant_as_bytes (obstack
, byte_order
,
23453 case DW_FORM_data4
:
23454 type
= die_type (die
, cu
);
23455 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23456 if (result
== NULL
)
23457 result
= write_constant_as_bytes (obstack
, byte_order
,
23460 case DW_FORM_data8
:
23461 type
= die_type (die
, cu
);
23462 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23463 if (result
== NULL
)
23464 result
= write_constant_as_bytes (obstack
, byte_order
,
23468 case DW_FORM_sdata
:
23469 case DW_FORM_implicit_const
:
23470 type
= die_type (die
, cu
);
23471 result
= write_constant_as_bytes (obstack
, byte_order
,
23472 type
, DW_SND (attr
), len
);
23475 case DW_FORM_udata
:
23476 type
= die_type (die
, cu
);
23477 result
= write_constant_as_bytes (obstack
, byte_order
,
23478 type
, DW_UNSND (attr
), len
);
23482 complaint (_("unsupported const value attribute form: '%s'"),
23483 dwarf_form_name (attr
->form
));
23490 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23491 valid type for this die is found. */
23494 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23495 struct dwarf2_per_cu_data
*per_cu
)
23497 struct dwarf2_cu
*cu
;
23498 struct die_info
*die
;
23500 if (per_cu
->cu
== NULL
)
23501 load_cu (per_cu
, false);
23506 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23510 return die_type (die
, cu
);
23513 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23517 dwarf2_get_die_type (cu_offset die_offset
,
23518 struct dwarf2_per_cu_data
*per_cu
)
23520 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23521 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23524 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23525 On entry *REF_CU is the CU of SRC_DIE.
23526 On exit *REF_CU is the CU of the result.
23527 Returns NULL if the referenced DIE isn't found. */
23529 static struct die_info
*
23530 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23531 struct dwarf2_cu
**ref_cu
)
23533 struct die_info temp_die
;
23534 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
23535 struct die_info
*die
;
23537 /* While it might be nice to assert sig_type->type == NULL here,
23538 we can get here for DW_AT_imported_declaration where we need
23539 the DIE not the type. */
23541 /* If necessary, add it to the queue and load its DIEs. */
23543 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23544 read_signatured_type (sig_type
);
23546 sig_cu
= sig_type
->per_cu
.cu
;
23547 gdb_assert (sig_cu
!= NULL
);
23548 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23549 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23550 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23551 to_underlying (temp_die
.sect_off
));
23554 struct dwarf2_per_objfile
*dwarf2_per_objfile
23555 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23557 /* For .gdb_index version 7 keep track of included TUs.
23558 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23559 if (dwarf2_per_objfile
->index_table
!= NULL
23560 && dwarf2_per_objfile
->index_table
->version
<= 7)
23562 VEC_safe_push (dwarf2_per_cu_ptr
,
23563 (*ref_cu
)->per_cu
->imported_symtabs
,
23569 sig_cu
->ancestor
= cu
;
23577 /* Follow signatured type referenced by ATTR in SRC_DIE.
23578 On entry *REF_CU is the CU of SRC_DIE.
23579 On exit *REF_CU is the CU of the result.
23580 The result is the DIE of the type.
23581 If the referenced type cannot be found an error is thrown. */
23583 static struct die_info
*
23584 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23585 struct dwarf2_cu
**ref_cu
)
23587 ULONGEST signature
= DW_SIGNATURE (attr
);
23588 struct signatured_type
*sig_type
;
23589 struct die_info
*die
;
23591 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23593 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23594 /* sig_type will be NULL if the signatured type is missing from
23596 if (sig_type
== NULL
)
23598 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23599 " from DIE at %s [in module %s]"),
23600 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23601 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23604 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23607 dump_die_for_error (src_die
);
23608 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23609 " from DIE at %s [in module %s]"),
23610 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23611 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23617 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23618 reading in and processing the type unit if necessary. */
23620 static struct type
*
23621 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23622 struct dwarf2_cu
*cu
)
23624 struct dwarf2_per_objfile
*dwarf2_per_objfile
23625 = cu
->per_cu
->dwarf2_per_objfile
;
23626 struct signatured_type
*sig_type
;
23627 struct dwarf2_cu
*type_cu
;
23628 struct die_info
*type_die
;
23631 sig_type
= lookup_signatured_type (cu
, signature
);
23632 /* sig_type will be NULL if the signatured type is missing from
23634 if (sig_type
== NULL
)
23636 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23637 " from DIE at %s [in module %s]"),
23638 hex_string (signature
), sect_offset_str (die
->sect_off
),
23639 objfile_name (dwarf2_per_objfile
->objfile
));
23640 return build_error_marker_type (cu
, die
);
23643 /* If we already know the type we're done. */
23644 if (sig_type
->type
!= NULL
)
23645 return sig_type
->type
;
23648 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23649 if (type_die
!= NULL
)
23651 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23652 is created. This is important, for example, because for c++ classes
23653 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23654 type
= read_type_die (type_die
, type_cu
);
23657 complaint (_("Dwarf Error: Cannot build signatured type %s"
23658 " referenced from DIE at %s [in module %s]"),
23659 hex_string (signature
), sect_offset_str (die
->sect_off
),
23660 objfile_name (dwarf2_per_objfile
->objfile
));
23661 type
= build_error_marker_type (cu
, die
);
23666 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23667 " from DIE at %s [in module %s]"),
23668 hex_string (signature
), sect_offset_str (die
->sect_off
),
23669 objfile_name (dwarf2_per_objfile
->objfile
));
23670 type
= build_error_marker_type (cu
, die
);
23672 sig_type
->type
= type
;
23677 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23678 reading in and processing the type unit if necessary. */
23680 static struct type
*
23681 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23682 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23684 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23685 if (attr_form_is_ref (attr
))
23687 struct dwarf2_cu
*type_cu
= cu
;
23688 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23690 return read_type_die (type_die
, type_cu
);
23692 else if (attr
->form
== DW_FORM_ref_sig8
)
23694 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23698 struct dwarf2_per_objfile
*dwarf2_per_objfile
23699 = cu
->per_cu
->dwarf2_per_objfile
;
23701 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23702 " at %s [in module %s]"),
23703 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23704 objfile_name (dwarf2_per_objfile
->objfile
));
23705 return build_error_marker_type (cu
, die
);
23709 /* Load the DIEs associated with type unit PER_CU into memory. */
23712 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23714 struct signatured_type
*sig_type
;
23716 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23717 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23719 /* We have the per_cu, but we need the signatured_type.
23720 Fortunately this is an easy translation. */
23721 gdb_assert (per_cu
->is_debug_types
);
23722 sig_type
= (struct signatured_type
*) per_cu
;
23724 gdb_assert (per_cu
->cu
== NULL
);
23726 read_signatured_type (sig_type
);
23728 gdb_assert (per_cu
->cu
!= NULL
);
23731 /* die_reader_func for read_signatured_type.
23732 This is identical to load_full_comp_unit_reader,
23733 but is kept separate for now. */
23736 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23737 const gdb_byte
*info_ptr
,
23738 struct die_info
*comp_unit_die
,
23742 struct dwarf2_cu
*cu
= reader
->cu
;
23744 gdb_assert (cu
->die_hash
== NULL
);
23746 htab_create_alloc_ex (cu
->header
.length
/ 12,
23750 &cu
->comp_unit_obstack
,
23751 hashtab_obstack_allocate
,
23752 dummy_obstack_deallocate
);
23755 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23756 &info_ptr
, comp_unit_die
);
23757 cu
->dies
= comp_unit_die
;
23758 /* comp_unit_die is not stored in die_hash, no need. */
23760 /* We try not to read any attributes in this function, because not
23761 all CUs needed for references have been loaded yet, and symbol
23762 table processing isn't initialized. But we have to set the CU language,
23763 or we won't be able to build types correctly.
23764 Similarly, if we do not read the producer, we can not apply
23765 producer-specific interpretation. */
23766 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23769 /* Read in a signatured type and build its CU and DIEs.
23770 If the type is a stub for the real type in a DWO file,
23771 read in the real type from the DWO file as well. */
23774 read_signatured_type (struct signatured_type
*sig_type
)
23776 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23778 gdb_assert (per_cu
->is_debug_types
);
23779 gdb_assert (per_cu
->cu
== NULL
);
23781 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1, false,
23782 read_signatured_type_reader
, NULL
);
23783 sig_type
->per_cu
.tu_read
= 1;
23786 /* Decode simple location descriptions.
23787 Given a pointer to a dwarf block that defines a location, compute
23788 the location and return the value.
23790 NOTE drow/2003-11-18: This function is called in two situations
23791 now: for the address of static or global variables (partial symbols
23792 only) and for offsets into structures which are expected to be
23793 (more or less) constant. The partial symbol case should go away,
23794 and only the constant case should remain. That will let this
23795 function complain more accurately. A few special modes are allowed
23796 without complaint for global variables (for instance, global
23797 register values and thread-local values).
23799 A location description containing no operations indicates that the
23800 object is optimized out. The return value is 0 for that case.
23801 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23802 callers will only want a very basic result and this can become a
23805 Note that stack[0] is unused except as a default error return. */
23808 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23810 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23812 size_t size
= blk
->size
;
23813 const gdb_byte
*data
= blk
->data
;
23814 CORE_ADDR stack
[64];
23816 unsigned int bytes_read
, unsnd
;
23822 stack
[++stacki
] = 0;
23861 stack
[++stacki
] = op
- DW_OP_lit0
;
23896 stack
[++stacki
] = op
- DW_OP_reg0
;
23898 dwarf2_complex_location_expr_complaint ();
23902 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23904 stack
[++stacki
] = unsnd
;
23906 dwarf2_complex_location_expr_complaint ();
23910 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23915 case DW_OP_const1u
:
23916 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23920 case DW_OP_const1s
:
23921 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23925 case DW_OP_const2u
:
23926 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23930 case DW_OP_const2s
:
23931 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23935 case DW_OP_const4u
:
23936 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23940 case DW_OP_const4s
:
23941 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23945 case DW_OP_const8u
:
23946 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23951 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23957 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23962 stack
[stacki
+ 1] = stack
[stacki
];
23967 stack
[stacki
- 1] += stack
[stacki
];
23971 case DW_OP_plus_uconst
:
23972 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23978 stack
[stacki
- 1] -= stack
[stacki
];
23983 /* If we're not the last op, then we definitely can't encode
23984 this using GDB's address_class enum. This is valid for partial
23985 global symbols, although the variable's address will be bogus
23988 dwarf2_complex_location_expr_complaint ();
23991 case DW_OP_GNU_push_tls_address
:
23992 case DW_OP_form_tls_address
:
23993 /* The top of the stack has the offset from the beginning
23994 of the thread control block at which the variable is located. */
23995 /* Nothing should follow this operator, so the top of stack would
23997 /* This is valid for partial global symbols, but the variable's
23998 address will be bogus in the psymtab. Make it always at least
23999 non-zero to not look as a variable garbage collected by linker
24000 which have DW_OP_addr 0. */
24002 dwarf2_complex_location_expr_complaint ();
24006 case DW_OP_GNU_uninit
:
24010 case DW_OP_GNU_addr_index
:
24011 case DW_OP_GNU_const_index
:
24012 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
24019 const char *name
= get_DW_OP_name (op
);
24022 complaint (_("unsupported stack op: '%s'"),
24025 complaint (_("unsupported stack op: '%02x'"),
24029 return (stack
[stacki
]);
24032 /* Enforce maximum stack depth of SIZE-1 to avoid writing
24033 outside of the allocated space. Also enforce minimum>0. */
24034 if (stacki
>= ARRAY_SIZE (stack
) - 1)
24036 complaint (_("location description stack overflow"));
24042 complaint (_("location description stack underflow"));
24046 return (stack
[stacki
]);
24049 /* memory allocation interface */
24051 static struct dwarf_block
*
24052 dwarf_alloc_block (struct dwarf2_cu
*cu
)
24054 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
24057 static struct die_info
*
24058 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
24060 struct die_info
*die
;
24061 size_t size
= sizeof (struct die_info
);
24064 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
24066 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
24067 memset (die
, 0, sizeof (struct die_info
));
24072 /* Macro support. */
24074 /* Return file name relative to the compilation directory of file number I in
24075 *LH's file name table. The result is allocated using xmalloc; the caller is
24076 responsible for freeing it. */
24079 file_file_name (int file
, struct line_header
*lh
)
24081 /* Is the file number a valid index into the line header's file name
24082 table? Remember that file numbers start with one, not zero. */
24083 if (1 <= file
&& file
<= lh
->file_names
.size ())
24085 const file_entry
&fe
= lh
->file_names
[file
- 1];
24087 if (!IS_ABSOLUTE_PATH (fe
.name
))
24089 const char *dir
= fe
.include_dir (lh
);
24091 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
24093 return xstrdup (fe
.name
);
24097 /* The compiler produced a bogus file number. We can at least
24098 record the macro definitions made in the file, even if we
24099 won't be able to find the file by name. */
24100 char fake_name
[80];
24102 xsnprintf (fake_name
, sizeof (fake_name
),
24103 "<bad macro file number %d>", file
);
24105 complaint (_("bad file number in macro information (%d)"),
24108 return xstrdup (fake_name
);
24112 /* Return the full name of file number I in *LH's file name table.
24113 Use COMP_DIR as the name of the current directory of the
24114 compilation. The result is allocated using xmalloc; the caller is
24115 responsible for freeing it. */
24117 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
24119 /* Is the file number a valid index into the line header's file name
24120 table? Remember that file numbers start with one, not zero. */
24121 if (1 <= file
&& file
<= lh
->file_names
.size ())
24123 char *relative
= file_file_name (file
, lh
);
24125 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
24127 return reconcat (relative
, comp_dir
, SLASH_STRING
,
24128 relative
, (char *) NULL
);
24131 return file_file_name (file
, lh
);
24135 static struct macro_source_file
*
24136 macro_start_file (struct dwarf2_cu
*cu
,
24137 int file
, int line
,
24138 struct macro_source_file
*current_file
,
24139 struct line_header
*lh
)
24141 /* File name relative to the compilation directory of this source file. */
24142 char *file_name
= file_file_name (file
, lh
);
24144 if (! current_file
)
24146 /* Note: We don't create a macro table for this compilation unit
24147 at all until we actually get a filename. */
24148 struct macro_table
*macro_table
= cu
->get_builder ()->get_macro_table ();
24150 /* If we have no current file, then this must be the start_file
24151 directive for the compilation unit's main source file. */
24152 current_file
= macro_set_main (macro_table
, file_name
);
24153 macro_define_special (macro_table
);
24156 current_file
= macro_include (current_file
, line
, file_name
);
24160 return current_file
;
24163 static const char *
24164 consume_improper_spaces (const char *p
, const char *body
)
24168 complaint (_("macro definition contains spaces "
24169 "in formal argument list:\n`%s'"),
24181 parse_macro_definition (struct macro_source_file
*file
, int line
,
24186 /* The body string takes one of two forms. For object-like macro
24187 definitions, it should be:
24189 <macro name> " " <definition>
24191 For function-like macro definitions, it should be:
24193 <macro name> "() " <definition>
24195 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
24197 Spaces may appear only where explicitly indicated, and in the
24200 The Dwarf 2 spec says that an object-like macro's name is always
24201 followed by a space, but versions of GCC around March 2002 omit
24202 the space when the macro's definition is the empty string.
24204 The Dwarf 2 spec says that there should be no spaces between the
24205 formal arguments in a function-like macro's formal argument list,
24206 but versions of GCC around March 2002 include spaces after the
24210 /* Find the extent of the macro name. The macro name is terminated
24211 by either a space or null character (for an object-like macro) or
24212 an opening paren (for a function-like macro). */
24213 for (p
= body
; *p
; p
++)
24214 if (*p
== ' ' || *p
== '(')
24217 if (*p
== ' ' || *p
== '\0')
24219 /* It's an object-like macro. */
24220 int name_len
= p
- body
;
24221 char *name
= savestring (body
, name_len
);
24222 const char *replacement
;
24225 replacement
= body
+ name_len
+ 1;
24228 dwarf2_macro_malformed_definition_complaint (body
);
24229 replacement
= body
+ name_len
;
24232 macro_define_object (file
, line
, name
, replacement
);
24236 else if (*p
== '(')
24238 /* It's a function-like macro. */
24239 char *name
= savestring (body
, p
- body
);
24242 char **argv
= XNEWVEC (char *, argv_size
);
24246 p
= consume_improper_spaces (p
, body
);
24248 /* Parse the formal argument list. */
24249 while (*p
&& *p
!= ')')
24251 /* Find the extent of the current argument name. */
24252 const char *arg_start
= p
;
24254 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
24257 if (! *p
|| p
== arg_start
)
24258 dwarf2_macro_malformed_definition_complaint (body
);
24261 /* Make sure argv has room for the new argument. */
24262 if (argc
>= argv_size
)
24265 argv
= XRESIZEVEC (char *, argv
, argv_size
);
24268 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
24271 p
= consume_improper_spaces (p
, body
);
24273 /* Consume the comma, if present. */
24278 p
= consume_improper_spaces (p
, body
);
24287 /* Perfectly formed definition, no complaints. */
24288 macro_define_function (file
, line
, name
,
24289 argc
, (const char **) argv
,
24291 else if (*p
== '\0')
24293 /* Complain, but do define it. */
24294 dwarf2_macro_malformed_definition_complaint (body
);
24295 macro_define_function (file
, line
, name
,
24296 argc
, (const char **) argv
,
24300 /* Just complain. */
24301 dwarf2_macro_malformed_definition_complaint (body
);
24304 /* Just complain. */
24305 dwarf2_macro_malformed_definition_complaint (body
);
24311 for (i
= 0; i
< argc
; i
++)
24317 dwarf2_macro_malformed_definition_complaint (body
);
24320 /* Skip some bytes from BYTES according to the form given in FORM.
24321 Returns the new pointer. */
24323 static const gdb_byte
*
24324 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
24325 enum dwarf_form form
,
24326 unsigned int offset_size
,
24327 struct dwarf2_section_info
*section
)
24329 unsigned int bytes_read
;
24333 case DW_FORM_data1
:
24338 case DW_FORM_data2
:
24342 case DW_FORM_data4
:
24346 case DW_FORM_data8
:
24350 case DW_FORM_data16
:
24354 case DW_FORM_string
:
24355 read_direct_string (abfd
, bytes
, &bytes_read
);
24356 bytes
+= bytes_read
;
24359 case DW_FORM_sec_offset
:
24361 case DW_FORM_GNU_strp_alt
:
24362 bytes
+= offset_size
;
24365 case DW_FORM_block
:
24366 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24367 bytes
+= bytes_read
;
24370 case DW_FORM_block1
:
24371 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24373 case DW_FORM_block2
:
24374 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24376 case DW_FORM_block4
:
24377 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24380 case DW_FORM_addrx
:
24381 case DW_FORM_sdata
:
24383 case DW_FORM_udata
:
24384 case DW_FORM_GNU_addr_index
:
24385 case DW_FORM_GNU_str_index
:
24386 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24389 dwarf2_section_buffer_overflow_complaint (section
);
24394 case DW_FORM_implicit_const
:
24399 complaint (_("invalid form 0x%x in `%s'"),
24400 form
, get_section_name (section
));
24408 /* A helper for dwarf_decode_macros that handles skipping an unknown
24409 opcode. Returns an updated pointer to the macro data buffer; or,
24410 on error, issues a complaint and returns NULL. */
24412 static const gdb_byte
*
24413 skip_unknown_opcode (unsigned int opcode
,
24414 const gdb_byte
**opcode_definitions
,
24415 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24417 unsigned int offset_size
,
24418 struct dwarf2_section_info
*section
)
24420 unsigned int bytes_read
, i
;
24422 const gdb_byte
*defn
;
24424 if (opcode_definitions
[opcode
] == NULL
)
24426 complaint (_("unrecognized DW_MACFINO opcode 0x%x"),
24431 defn
= opcode_definitions
[opcode
];
24432 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24433 defn
+= bytes_read
;
24435 for (i
= 0; i
< arg
; ++i
)
24437 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24438 (enum dwarf_form
) defn
[i
], offset_size
,
24440 if (mac_ptr
== NULL
)
24442 /* skip_form_bytes already issued the complaint. */
24450 /* A helper function which parses the header of a macro section.
24451 If the macro section is the extended (for now called "GNU") type,
24452 then this updates *OFFSET_SIZE. Returns a pointer to just after
24453 the header, or issues a complaint and returns NULL on error. */
24455 static const gdb_byte
*
24456 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24458 const gdb_byte
*mac_ptr
,
24459 unsigned int *offset_size
,
24460 int section_is_gnu
)
24462 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24464 if (section_is_gnu
)
24466 unsigned int version
, flags
;
24468 version
= read_2_bytes (abfd
, mac_ptr
);
24469 if (version
!= 4 && version
!= 5)
24471 complaint (_("unrecognized version `%d' in .debug_macro section"),
24477 flags
= read_1_byte (abfd
, mac_ptr
);
24479 *offset_size
= (flags
& 1) ? 8 : 4;
24481 if ((flags
& 2) != 0)
24482 /* We don't need the line table offset. */
24483 mac_ptr
+= *offset_size
;
24485 /* Vendor opcode descriptions. */
24486 if ((flags
& 4) != 0)
24488 unsigned int i
, count
;
24490 count
= read_1_byte (abfd
, mac_ptr
);
24492 for (i
= 0; i
< count
; ++i
)
24494 unsigned int opcode
, bytes_read
;
24497 opcode
= read_1_byte (abfd
, mac_ptr
);
24499 opcode_definitions
[opcode
] = mac_ptr
;
24500 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24501 mac_ptr
+= bytes_read
;
24510 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24511 including DW_MACRO_import. */
24514 dwarf_decode_macro_bytes (struct dwarf2_cu
*cu
,
24516 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24517 struct macro_source_file
*current_file
,
24518 struct line_header
*lh
,
24519 struct dwarf2_section_info
*section
,
24520 int section_is_gnu
, int section_is_dwz
,
24521 unsigned int offset_size
,
24522 htab_t include_hash
)
24524 struct dwarf2_per_objfile
*dwarf2_per_objfile
24525 = cu
->per_cu
->dwarf2_per_objfile
;
24526 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24527 enum dwarf_macro_record_type macinfo_type
;
24528 int at_commandline
;
24529 const gdb_byte
*opcode_definitions
[256];
24531 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24532 &offset_size
, section_is_gnu
);
24533 if (mac_ptr
== NULL
)
24535 /* We already issued a complaint. */
24539 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24540 GDB is still reading the definitions from command line. First
24541 DW_MACINFO_start_file will need to be ignored as it was already executed
24542 to create CURRENT_FILE for the main source holding also the command line
24543 definitions. On first met DW_MACINFO_start_file this flag is reset to
24544 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24546 at_commandline
= 1;
24550 /* Do we at least have room for a macinfo type byte? */
24551 if (mac_ptr
>= mac_end
)
24553 dwarf2_section_buffer_overflow_complaint (section
);
24557 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24560 /* Note that we rely on the fact that the corresponding GNU and
24561 DWARF constants are the same. */
24563 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24564 switch (macinfo_type
)
24566 /* A zero macinfo type indicates the end of the macro
24571 case DW_MACRO_define
:
24572 case DW_MACRO_undef
:
24573 case DW_MACRO_define_strp
:
24574 case DW_MACRO_undef_strp
:
24575 case DW_MACRO_define_sup
:
24576 case DW_MACRO_undef_sup
:
24578 unsigned int bytes_read
;
24583 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24584 mac_ptr
+= bytes_read
;
24586 if (macinfo_type
== DW_MACRO_define
24587 || macinfo_type
== DW_MACRO_undef
)
24589 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24590 mac_ptr
+= bytes_read
;
24594 LONGEST str_offset
;
24596 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24597 mac_ptr
+= offset_size
;
24599 if (macinfo_type
== DW_MACRO_define_sup
24600 || macinfo_type
== DW_MACRO_undef_sup
24603 struct dwz_file
*dwz
24604 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24606 body
= read_indirect_string_from_dwz (objfile
,
24610 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24614 is_define
= (macinfo_type
== DW_MACRO_define
24615 || macinfo_type
== DW_MACRO_define_strp
24616 || macinfo_type
== DW_MACRO_define_sup
);
24617 if (! current_file
)
24619 /* DWARF violation as no main source is present. */
24620 complaint (_("debug info with no main source gives macro %s "
24622 is_define
? _("definition") : _("undefinition"),
24626 if ((line
== 0 && !at_commandline
)
24627 || (line
!= 0 && at_commandline
))
24628 complaint (_("debug info gives %s macro %s with %s line %d: %s"),
24629 at_commandline
? _("command-line") : _("in-file"),
24630 is_define
? _("definition") : _("undefinition"),
24631 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24636 parse_macro_definition (current_file
, line
, body
);
24639 /* Fedora's rpm-build's "debugedit" binary
24640 corrupted .debug_macro sections.
24643 https://bugzilla.redhat.com/show_bug.cgi?id=1708786 */
24644 complaint (_("debug info gives %s invalid macro definition "
24645 "without body (corrupted?) at line %d"
24647 at_commandline
? _("command-line")
24649 line
, current_file
->filename
);
24654 gdb_assert (macinfo_type
== DW_MACRO_undef
24655 || macinfo_type
== DW_MACRO_undef_strp
24656 || macinfo_type
== DW_MACRO_undef_sup
);
24657 macro_undef (current_file
, line
, body
);
24662 case DW_MACRO_start_file
:
24664 unsigned int bytes_read
;
24667 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24668 mac_ptr
+= bytes_read
;
24669 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24670 mac_ptr
+= bytes_read
;
24672 if ((line
== 0 && !at_commandline
)
24673 || (line
!= 0 && at_commandline
))
24674 complaint (_("debug info gives source %d included "
24675 "from %s at %s line %d"),
24676 file
, at_commandline
? _("command-line") : _("file"),
24677 line
== 0 ? _("zero") : _("non-zero"), line
);
24679 if (at_commandline
)
24681 /* This DW_MACRO_start_file was executed in the
24683 at_commandline
= 0;
24686 current_file
= macro_start_file (cu
, file
, line
, current_file
,
24691 case DW_MACRO_end_file
:
24692 if (! current_file
)
24693 complaint (_("macro debug info has an unmatched "
24694 "`close_file' directive"));
24697 current_file
= current_file
->included_by
;
24698 if (! current_file
)
24700 enum dwarf_macro_record_type next_type
;
24702 /* GCC circa March 2002 doesn't produce the zero
24703 type byte marking the end of the compilation
24704 unit. Complain if it's not there, but exit no
24707 /* Do we at least have room for a macinfo type byte? */
24708 if (mac_ptr
>= mac_end
)
24710 dwarf2_section_buffer_overflow_complaint (section
);
24714 /* We don't increment mac_ptr here, so this is just
24717 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24719 if (next_type
!= 0)
24720 complaint (_("no terminating 0-type entry for "
24721 "macros in `.debug_macinfo' section"));
24728 case DW_MACRO_import
:
24729 case DW_MACRO_import_sup
:
24733 bfd
*include_bfd
= abfd
;
24734 struct dwarf2_section_info
*include_section
= section
;
24735 const gdb_byte
*include_mac_end
= mac_end
;
24736 int is_dwz
= section_is_dwz
;
24737 const gdb_byte
*new_mac_ptr
;
24739 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24740 mac_ptr
+= offset_size
;
24742 if (macinfo_type
== DW_MACRO_import_sup
)
24744 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24746 dwarf2_read_section (objfile
, &dwz
->macro
);
24748 include_section
= &dwz
->macro
;
24749 include_bfd
= get_section_bfd_owner (include_section
);
24750 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24754 new_mac_ptr
= include_section
->buffer
+ offset
;
24755 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24759 /* This has actually happened; see
24760 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24761 complaint (_("recursive DW_MACRO_import in "
24762 ".debug_macro section"));
24766 *slot
= (void *) new_mac_ptr
;
24768 dwarf_decode_macro_bytes (cu
, include_bfd
, new_mac_ptr
,
24769 include_mac_end
, current_file
, lh
,
24770 section
, section_is_gnu
, is_dwz
,
24771 offset_size
, include_hash
);
24773 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24778 case DW_MACINFO_vendor_ext
:
24779 if (!section_is_gnu
)
24781 unsigned int bytes_read
;
24783 /* This reads the constant, but since we don't recognize
24784 any vendor extensions, we ignore it. */
24785 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24786 mac_ptr
+= bytes_read
;
24787 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24788 mac_ptr
+= bytes_read
;
24790 /* We don't recognize any vendor extensions. */
24796 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24797 mac_ptr
, mac_end
, abfd
, offset_size
,
24799 if (mac_ptr
== NULL
)
24804 } while (macinfo_type
!= 0);
24808 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24809 int section_is_gnu
)
24811 struct dwarf2_per_objfile
*dwarf2_per_objfile
24812 = cu
->per_cu
->dwarf2_per_objfile
;
24813 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24814 struct line_header
*lh
= cu
->line_header
;
24816 const gdb_byte
*mac_ptr
, *mac_end
;
24817 struct macro_source_file
*current_file
= 0;
24818 enum dwarf_macro_record_type macinfo_type
;
24819 unsigned int offset_size
= cu
->header
.offset_size
;
24820 const gdb_byte
*opcode_definitions
[256];
24822 struct dwarf2_section_info
*section
;
24823 const char *section_name
;
24825 if (cu
->dwo_unit
!= NULL
)
24827 if (section_is_gnu
)
24829 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24830 section_name
= ".debug_macro.dwo";
24834 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24835 section_name
= ".debug_macinfo.dwo";
24840 if (section_is_gnu
)
24842 section
= &dwarf2_per_objfile
->macro
;
24843 section_name
= ".debug_macro";
24847 section
= &dwarf2_per_objfile
->macinfo
;
24848 section_name
= ".debug_macinfo";
24852 dwarf2_read_section (objfile
, section
);
24853 if (section
->buffer
== NULL
)
24855 complaint (_("missing %s section"), section_name
);
24858 abfd
= get_section_bfd_owner (section
);
24860 /* First pass: Find the name of the base filename.
24861 This filename is needed in order to process all macros whose definition
24862 (or undefinition) comes from the command line. These macros are defined
24863 before the first DW_MACINFO_start_file entry, and yet still need to be
24864 associated to the base file.
24866 To determine the base file name, we scan the macro definitions until we
24867 reach the first DW_MACINFO_start_file entry. We then initialize
24868 CURRENT_FILE accordingly so that any macro definition found before the
24869 first DW_MACINFO_start_file can still be associated to the base file. */
24871 mac_ptr
= section
->buffer
+ offset
;
24872 mac_end
= section
->buffer
+ section
->size
;
24874 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24875 &offset_size
, section_is_gnu
);
24876 if (mac_ptr
== NULL
)
24878 /* We already issued a complaint. */
24884 /* Do we at least have room for a macinfo type byte? */
24885 if (mac_ptr
>= mac_end
)
24887 /* Complaint is printed during the second pass as GDB will probably
24888 stop the first pass earlier upon finding
24889 DW_MACINFO_start_file. */
24893 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24896 /* Note that we rely on the fact that the corresponding GNU and
24897 DWARF constants are the same. */
24899 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24900 switch (macinfo_type
)
24902 /* A zero macinfo type indicates the end of the macro
24907 case DW_MACRO_define
:
24908 case DW_MACRO_undef
:
24909 /* Only skip the data by MAC_PTR. */
24911 unsigned int bytes_read
;
24913 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24914 mac_ptr
+= bytes_read
;
24915 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24916 mac_ptr
+= bytes_read
;
24920 case DW_MACRO_start_file
:
24922 unsigned int bytes_read
;
24925 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24926 mac_ptr
+= bytes_read
;
24927 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24928 mac_ptr
+= bytes_read
;
24930 current_file
= macro_start_file (cu
, file
, line
, current_file
, lh
);
24934 case DW_MACRO_end_file
:
24935 /* No data to skip by MAC_PTR. */
24938 case DW_MACRO_define_strp
:
24939 case DW_MACRO_undef_strp
:
24940 case DW_MACRO_define_sup
:
24941 case DW_MACRO_undef_sup
:
24943 unsigned int bytes_read
;
24945 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24946 mac_ptr
+= bytes_read
;
24947 mac_ptr
+= offset_size
;
24951 case DW_MACRO_import
:
24952 case DW_MACRO_import_sup
:
24953 /* Note that, according to the spec, a transparent include
24954 chain cannot call DW_MACRO_start_file. So, we can just
24955 skip this opcode. */
24956 mac_ptr
+= offset_size
;
24959 case DW_MACINFO_vendor_ext
:
24960 /* Only skip the data by MAC_PTR. */
24961 if (!section_is_gnu
)
24963 unsigned int bytes_read
;
24965 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24966 mac_ptr
+= bytes_read
;
24967 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24968 mac_ptr
+= bytes_read
;
24973 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24974 mac_ptr
, mac_end
, abfd
, offset_size
,
24976 if (mac_ptr
== NULL
)
24981 } while (macinfo_type
!= 0 && current_file
== NULL
);
24983 /* Second pass: Process all entries.
24985 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24986 command-line macro definitions/undefinitions. This flag is unset when we
24987 reach the first DW_MACINFO_start_file entry. */
24989 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24991 NULL
, xcalloc
, xfree
));
24992 mac_ptr
= section
->buffer
+ offset
;
24993 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24994 *slot
= (void *) mac_ptr
;
24995 dwarf_decode_macro_bytes (cu
, abfd
, mac_ptr
, mac_end
,
24996 current_file
, lh
, section
,
24997 section_is_gnu
, 0, offset_size
,
24998 include_hash
.get ());
25001 /* Check if the attribute's form is a DW_FORM_block*
25002 if so return true else false. */
25005 attr_form_is_block (const struct attribute
*attr
)
25007 return (attr
== NULL
? 0 :
25008 attr
->form
== DW_FORM_block1
25009 || attr
->form
== DW_FORM_block2
25010 || attr
->form
== DW_FORM_block4
25011 || attr
->form
== DW_FORM_block
25012 || attr
->form
== DW_FORM_exprloc
);
25015 /* Return non-zero if ATTR's value is a section offset --- classes
25016 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
25017 You may use DW_UNSND (attr) to retrieve such offsets.
25019 Section 7.5.4, "Attribute Encodings", explains that no attribute
25020 may have a value that belongs to more than one of these classes; it
25021 would be ambiguous if we did, because we use the same forms for all
25025 attr_form_is_section_offset (const struct attribute
*attr
)
25027 return (attr
->form
== DW_FORM_data4
25028 || attr
->form
== DW_FORM_data8
25029 || attr
->form
== DW_FORM_sec_offset
);
25032 /* Return non-zero if ATTR's value falls in the 'constant' class, or
25033 zero otherwise. When this function returns true, you can apply
25034 dwarf2_get_attr_constant_value to it.
25036 However, note that for some attributes you must check
25037 attr_form_is_section_offset before using this test. DW_FORM_data4
25038 and DW_FORM_data8 are members of both the constant class, and of
25039 the classes that contain offsets into other debug sections
25040 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
25041 that, if an attribute's can be either a constant or one of the
25042 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
25043 taken as section offsets, not constants.
25045 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
25046 cannot handle that. */
25049 attr_form_is_constant (const struct attribute
*attr
)
25051 switch (attr
->form
)
25053 case DW_FORM_sdata
:
25054 case DW_FORM_udata
:
25055 case DW_FORM_data1
:
25056 case DW_FORM_data2
:
25057 case DW_FORM_data4
:
25058 case DW_FORM_data8
:
25059 case DW_FORM_implicit_const
:
25067 /* DW_ADDR is always stored already as sect_offset; despite for the forms
25068 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
25071 attr_form_is_ref (const struct attribute
*attr
)
25073 switch (attr
->form
)
25075 case DW_FORM_ref_addr
:
25080 case DW_FORM_ref_udata
:
25081 case DW_FORM_GNU_ref_alt
:
25088 /* Return the .debug_loc section to use for CU.
25089 For DWO files use .debug_loc.dwo. */
25091 static struct dwarf2_section_info
*
25092 cu_debug_loc_section (struct dwarf2_cu
*cu
)
25094 struct dwarf2_per_objfile
*dwarf2_per_objfile
25095 = cu
->per_cu
->dwarf2_per_objfile
;
25099 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
25101 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
25103 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
25104 : &dwarf2_per_objfile
->loc
);
25107 /* A helper function that fills in a dwarf2_loclist_baton. */
25110 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
25111 struct dwarf2_loclist_baton
*baton
,
25112 const struct attribute
*attr
)
25114 struct dwarf2_per_objfile
*dwarf2_per_objfile
25115 = cu
->per_cu
->dwarf2_per_objfile
;
25116 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
25118 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
25120 baton
->per_cu
= cu
->per_cu
;
25121 gdb_assert (baton
->per_cu
);
25122 /* We don't know how long the location list is, but make sure we
25123 don't run off the edge of the section. */
25124 baton
->size
= section
->size
- DW_UNSND (attr
);
25125 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
25126 baton
->base_address
= cu
->base_address
;
25127 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
25131 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
25132 struct dwarf2_cu
*cu
, int is_block
)
25134 struct dwarf2_per_objfile
*dwarf2_per_objfile
25135 = cu
->per_cu
->dwarf2_per_objfile
;
25136 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25137 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
25139 if (attr_form_is_section_offset (attr
)
25140 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
25141 the section. If so, fall through to the complaint in the
25143 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
25145 struct dwarf2_loclist_baton
*baton
;
25147 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
25149 fill_in_loclist_baton (cu
, baton
, attr
);
25151 if (cu
->base_known
== 0)
25152 complaint (_("Location list used without "
25153 "specifying the CU base address."));
25155 SYMBOL_ACLASS_INDEX (sym
) = (is_block
25156 ? dwarf2_loclist_block_index
25157 : dwarf2_loclist_index
);
25158 SYMBOL_LOCATION_BATON (sym
) = baton
;
25162 struct dwarf2_locexpr_baton
*baton
;
25164 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
25165 baton
->per_cu
= cu
->per_cu
;
25166 gdb_assert (baton
->per_cu
);
25168 if (attr_form_is_block (attr
))
25170 /* Note that we're just copying the block's data pointer
25171 here, not the actual data. We're still pointing into the
25172 info_buffer for SYM's objfile; right now we never release
25173 that buffer, but when we do clean up properly this may
25175 baton
->size
= DW_BLOCK (attr
)->size
;
25176 baton
->data
= DW_BLOCK (attr
)->data
;
25180 dwarf2_invalid_attrib_class_complaint ("location description",
25181 SYMBOL_NATURAL_NAME (sym
));
25185 SYMBOL_ACLASS_INDEX (sym
) = (is_block
25186 ? dwarf2_locexpr_block_index
25187 : dwarf2_locexpr_index
);
25188 SYMBOL_LOCATION_BATON (sym
) = baton
;
25192 /* Return the OBJFILE associated with the compilation unit CU. If CU
25193 came from a separate debuginfo file, then the master objfile is
25197 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
25199 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25201 /* Return the master objfile, so that we can report and look up the
25202 correct file containing this variable. */
25203 if (objfile
->separate_debug_objfile_backlink
)
25204 objfile
= objfile
->separate_debug_objfile_backlink
;
25209 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
25210 (CU_HEADERP is unused in such case) or prepare a temporary copy at
25211 CU_HEADERP first. */
25213 static const struct comp_unit_head
*
25214 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
25215 struct dwarf2_per_cu_data
*per_cu
)
25217 const gdb_byte
*info_ptr
;
25220 return &per_cu
->cu
->header
;
25222 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
25224 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
25225 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
25226 rcuh_kind::COMPILE
);
25231 /* Return the address size given in the compilation unit header for CU. */
25234 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
25236 struct comp_unit_head cu_header_local
;
25237 const struct comp_unit_head
*cu_headerp
;
25239 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25241 return cu_headerp
->addr_size
;
25244 /* Return the offset size given in the compilation unit header for CU. */
25247 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
25249 struct comp_unit_head cu_header_local
;
25250 const struct comp_unit_head
*cu_headerp
;
25252 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25254 return cu_headerp
->offset_size
;
25257 /* See its dwarf2loc.h declaration. */
25260 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
25262 struct comp_unit_head cu_header_local
;
25263 const struct comp_unit_head
*cu_headerp
;
25265 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25267 if (cu_headerp
->version
== 2)
25268 return cu_headerp
->addr_size
;
25270 return cu_headerp
->offset_size
;
25273 /* Return the text offset of the CU. The returned offset comes from
25274 this CU's objfile. If this objfile came from a separate debuginfo
25275 file, then the offset may be different from the corresponding
25276 offset in the parent objfile. */
25279 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
25281 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25283 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
25286 /* Return DWARF version number of PER_CU. */
25289 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
25291 return per_cu
->dwarf_version
;
25294 /* Locate the .debug_info compilation unit from CU's objfile which contains
25295 the DIE at OFFSET. Raises an error on failure. */
25297 static struct dwarf2_per_cu_data
*
25298 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
25299 unsigned int offset_in_dwz
,
25300 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25302 struct dwarf2_per_cu_data
*this_cu
;
25306 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
25309 struct dwarf2_per_cu_data
*mid_cu
;
25310 int mid
= low
+ (high
- low
) / 2;
25312 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
25313 if (mid_cu
->is_dwz
> offset_in_dwz
25314 || (mid_cu
->is_dwz
== offset_in_dwz
25315 && mid_cu
->sect_off
+ mid_cu
->length
>= sect_off
))
25320 gdb_assert (low
== high
);
25321 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25322 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
25324 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
25325 error (_("Dwarf Error: could not find partial DIE containing "
25326 "offset %s [in module %s]"),
25327 sect_offset_str (sect_off
),
25328 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
25330 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
25332 return dwarf2_per_objfile
->all_comp_units
[low
-1];
25336 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
25337 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
25338 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
25339 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
25344 /* Initialize dwarf2_cu CU, owned by PER_CU. */
25346 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
25347 : per_cu (per_cu_
),
25349 has_loclist (false),
25350 checked_producer (false),
25351 producer_is_gxx_lt_4_6 (false),
25352 producer_is_gcc_lt_4_3 (false),
25353 producer_is_icc (false),
25354 producer_is_icc_lt_14 (false),
25355 producer_is_codewarrior (false),
25356 processing_has_namespace_info (false)
25361 /* Destroy a dwarf2_cu. */
25363 dwarf2_cu::~dwarf2_cu ()
25368 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
25371 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
25372 enum language pretend_language
)
25374 struct attribute
*attr
;
25376 /* Set the language we're debugging. */
25377 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
25379 set_cu_language (DW_UNSND (attr
), cu
);
25382 cu
->language
= pretend_language
;
25383 cu
->language_defn
= language_def (cu
->language
);
25386 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25389 /* Increase the age counter on each cached compilation unit, and free
25390 any that are too old. */
25393 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25395 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25397 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25398 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25399 while (per_cu
!= NULL
)
25401 per_cu
->cu
->last_used
++;
25402 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25403 dwarf2_mark (per_cu
->cu
);
25404 per_cu
= per_cu
->cu
->read_in_chain
;
25407 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25408 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25409 while (per_cu
!= NULL
)
25411 struct dwarf2_per_cu_data
*next_cu
;
25413 next_cu
= per_cu
->cu
->read_in_chain
;
25415 if (!per_cu
->cu
->mark
)
25418 *last_chain
= next_cu
;
25421 last_chain
= &per_cu
->cu
->read_in_chain
;
25427 /* Remove a single compilation unit from the cache. */
25430 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25432 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25433 struct dwarf2_per_objfile
*dwarf2_per_objfile
25434 = target_per_cu
->dwarf2_per_objfile
;
25436 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25437 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25438 while (per_cu
!= NULL
)
25440 struct dwarf2_per_cu_data
*next_cu
;
25442 next_cu
= per_cu
->cu
->read_in_chain
;
25444 if (per_cu
== target_per_cu
)
25448 *last_chain
= next_cu
;
25452 last_chain
= &per_cu
->cu
->read_in_chain
;
25458 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25459 We store these in a hash table separate from the DIEs, and preserve them
25460 when the DIEs are flushed out of cache.
25462 The CU "per_cu" pointer is needed because offset alone is not enough to
25463 uniquely identify the type. A file may have multiple .debug_types sections,
25464 or the type may come from a DWO file. Furthermore, while it's more logical
25465 to use per_cu->section+offset, with Fission the section with the data is in
25466 the DWO file but we don't know that section at the point we need it.
25467 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25468 because we can enter the lookup routine, get_die_type_at_offset, from
25469 outside this file, and thus won't necessarily have PER_CU->cu.
25470 Fortunately, PER_CU is stable for the life of the objfile. */
25472 struct dwarf2_per_cu_offset_and_type
25474 const struct dwarf2_per_cu_data
*per_cu
;
25475 sect_offset sect_off
;
25479 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25482 per_cu_offset_and_type_hash (const void *item
)
25484 const struct dwarf2_per_cu_offset_and_type
*ofs
25485 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25487 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25490 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25493 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25495 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25496 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25497 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25498 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25500 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25501 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25504 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25505 table if necessary. For convenience, return TYPE.
25507 The DIEs reading must have careful ordering to:
25508 * Not cause infite loops trying to read in DIEs as a prerequisite for
25509 reading current DIE.
25510 * Not trying to dereference contents of still incompletely read in types
25511 while reading in other DIEs.
25512 * Enable referencing still incompletely read in types just by a pointer to
25513 the type without accessing its fields.
25515 Therefore caller should follow these rules:
25516 * Try to fetch any prerequisite types we may need to build this DIE type
25517 before building the type and calling set_die_type.
25518 * After building type call set_die_type for current DIE as soon as
25519 possible before fetching more types to complete the current type.
25520 * Make the type as complete as possible before fetching more types. */
25522 static struct type
*
25523 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25525 struct dwarf2_per_objfile
*dwarf2_per_objfile
25526 = cu
->per_cu
->dwarf2_per_objfile
;
25527 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25528 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25529 struct attribute
*attr
;
25530 struct dynamic_prop prop
;
25532 /* For Ada types, make sure that the gnat-specific data is always
25533 initialized (if not already set). There are a few types where
25534 we should not be doing so, because the type-specific area is
25535 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25536 where the type-specific area is used to store the floatformat).
25537 But this is not a problem, because the gnat-specific information
25538 is actually not needed for these types. */
25539 if (need_gnat_info (cu
)
25540 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25541 && TYPE_CODE (type
) != TYPE_CODE_FLT
25542 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25543 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25544 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25545 && !HAVE_GNAT_AUX_INFO (type
))
25546 INIT_GNAT_SPECIFIC (type
);
25548 /* Read DW_AT_allocated and set in type. */
25549 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25550 if (attr_form_is_block (attr
))
25552 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25553 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25555 else if (attr
!= NULL
)
25557 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25558 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25559 sect_offset_str (die
->sect_off
));
25562 /* Read DW_AT_associated and set in type. */
25563 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25564 if (attr_form_is_block (attr
))
25566 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25567 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25569 else if (attr
!= NULL
)
25571 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
25572 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25573 sect_offset_str (die
->sect_off
));
25576 /* Read DW_AT_data_location and set in type. */
25577 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25578 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25579 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25581 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25583 dwarf2_per_objfile
->die_type_hash
=
25584 htab_create_alloc_ex (127,
25585 per_cu_offset_and_type_hash
,
25586 per_cu_offset_and_type_eq
,
25588 &objfile
->objfile_obstack
,
25589 hashtab_obstack_allocate
,
25590 dummy_obstack_deallocate
);
25593 ofs
.per_cu
= cu
->per_cu
;
25594 ofs
.sect_off
= die
->sect_off
;
25596 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25597 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25599 complaint (_("A problem internal to GDB: DIE %s has type already set"),
25600 sect_offset_str (die
->sect_off
));
25601 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25602 struct dwarf2_per_cu_offset_and_type
);
25607 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25608 or return NULL if the die does not have a saved type. */
25610 static struct type
*
25611 get_die_type_at_offset (sect_offset sect_off
,
25612 struct dwarf2_per_cu_data
*per_cu
)
25614 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25615 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25617 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25620 ofs
.per_cu
= per_cu
;
25621 ofs
.sect_off
= sect_off
;
25622 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25623 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25630 /* Look up the type for DIE in CU in die_type_hash,
25631 or return NULL if DIE does not have a saved type. */
25633 static struct type
*
25634 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25636 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25639 /* Add a dependence relationship from CU to REF_PER_CU. */
25642 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25643 struct dwarf2_per_cu_data
*ref_per_cu
)
25647 if (cu
->dependencies
== NULL
)
25649 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25650 NULL
, &cu
->comp_unit_obstack
,
25651 hashtab_obstack_allocate
,
25652 dummy_obstack_deallocate
);
25654 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25656 *slot
= ref_per_cu
;
25659 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25660 Set the mark field in every compilation unit in the
25661 cache that we must keep because we are keeping CU. */
25664 dwarf2_mark_helper (void **slot
, void *data
)
25666 struct dwarf2_per_cu_data
*per_cu
;
25668 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25670 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25671 reading of the chain. As such dependencies remain valid it is not much
25672 useful to track and undo them during QUIT cleanups. */
25673 if (per_cu
->cu
== NULL
)
25676 if (per_cu
->cu
->mark
)
25678 per_cu
->cu
->mark
= true;
25680 if (per_cu
->cu
->dependencies
!= NULL
)
25681 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25686 /* Set the mark field in CU and in every other compilation unit in the
25687 cache that we must keep because we are keeping CU. */
25690 dwarf2_mark (struct dwarf2_cu
*cu
)
25695 if (cu
->dependencies
!= NULL
)
25696 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25700 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25704 per_cu
->cu
->mark
= false;
25705 per_cu
= per_cu
->cu
->read_in_chain
;
25709 /* Trivial hash function for partial_die_info: the hash value of a DIE
25710 is its offset in .debug_info for this objfile. */
25713 partial_die_hash (const void *item
)
25715 const struct partial_die_info
*part_die
25716 = (const struct partial_die_info
*) item
;
25718 return to_underlying (part_die
->sect_off
);
25721 /* Trivial comparison function for partial_die_info structures: two DIEs
25722 are equal if they have the same offset. */
25725 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25727 const struct partial_die_info
*part_die_lhs
25728 = (const struct partial_die_info
*) item_lhs
;
25729 const struct partial_die_info
*part_die_rhs
25730 = (const struct partial_die_info
*) item_rhs
;
25732 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25735 struct cmd_list_element
*set_dwarf_cmdlist
;
25736 struct cmd_list_element
*show_dwarf_cmdlist
;
25739 set_dwarf_cmd (const char *args
, int from_tty
)
25741 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25746 show_dwarf_cmd (const char *args
, int from_tty
)
25748 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25751 int dwarf_always_disassemble
;
25754 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25755 struct cmd_list_element
*c
, const char *value
)
25757 fprintf_filtered (file
,
25758 _("Whether to always disassemble "
25759 "DWARF expressions is %s.\n"),
25764 show_check_physname (struct ui_file
*file
, int from_tty
,
25765 struct cmd_list_element
*c
, const char *value
)
25767 fprintf_filtered (file
,
25768 _("Whether to check \"physname\" is %s.\n"),
25773 _initialize_dwarf2_read (void)
25775 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25776 Set DWARF specific variables.\n\
25777 Configure DWARF variables such as the cache size"),
25778 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25779 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25781 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25782 Show DWARF specific variables\n\
25783 Show DWARF variables such as the cache size"),
25784 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25785 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25787 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25788 &dwarf_max_cache_age
, _("\
25789 Set the upper bound on the age of cached DWARF compilation units."), _("\
25790 Show the upper bound on the age of cached DWARF compilation units."), _("\
25791 A higher limit means that cached compilation units will be stored\n\
25792 in memory longer, and more total memory will be used. Zero disables\n\
25793 caching, which can slow down startup."),
25795 show_dwarf_max_cache_age
,
25796 &set_dwarf_cmdlist
,
25797 &show_dwarf_cmdlist
);
25799 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25800 &dwarf_always_disassemble
, _("\
25801 Set whether `info address' always disassembles DWARF expressions."), _("\
25802 Show whether `info address' always disassembles DWARF expressions."), _("\
25803 When enabled, DWARF expressions are always printed in an assembly-like\n\
25804 syntax. When disabled, expressions will be printed in a more\n\
25805 conversational style, when possible."),
25807 show_dwarf_always_disassemble
,
25808 &set_dwarf_cmdlist
,
25809 &show_dwarf_cmdlist
);
25811 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25812 Set debugging of the DWARF reader."), _("\
25813 Show debugging of the DWARF reader."), _("\
25814 When enabled (non-zero), debugging messages are printed during DWARF\n\
25815 reading and symtab expansion. A value of 1 (one) provides basic\n\
25816 information. A value greater than 1 provides more verbose information."),
25819 &setdebuglist
, &showdebuglist
);
25821 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25822 Set debugging of the DWARF DIE reader."), _("\
25823 Show debugging of the DWARF DIE reader."), _("\
25824 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25825 The value is the maximum depth to print."),
25828 &setdebuglist
, &showdebuglist
);
25830 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25831 Set debugging of the dwarf line reader."), _("\
25832 Show debugging of the dwarf line reader."), _("\
25833 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25834 A value of 1 (one) provides basic information.\n\
25835 A value greater than 1 provides more verbose information."),
25838 &setdebuglist
, &showdebuglist
);
25840 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25841 Set cross-checking of \"physname\" code against demangler."), _("\
25842 Show cross-checking of \"physname\" code against demangler."), _("\
25843 When enabled, GDB's internal \"physname\" code is checked against\n\
25845 NULL
, show_check_physname
,
25846 &setdebuglist
, &showdebuglist
);
25848 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25849 no_class
, &use_deprecated_index_sections
, _("\
25850 Set whether to use deprecated gdb_index sections."), _("\
25851 Show whether to use deprecated gdb_index sections."), _("\
25852 When enabled, deprecated .gdb_index sections are used anyway.\n\
25853 Normally they are ignored either because of a missing feature or\n\
25854 performance issue.\n\
25855 Warning: This option must be enabled before gdb reads the file."),
25858 &setlist
, &showlist
);
25860 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25861 &dwarf2_locexpr_funcs
);
25862 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25863 &dwarf2_loclist_funcs
);
25865 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25866 &dwarf2_block_frame_base_locexpr_funcs
);
25867 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25868 &dwarf2_block_frame_base_loclist_funcs
);
25871 selftests::register_test ("dw2_expand_symtabs_matching",
25872 selftests::dw2_expand_symtabs_matching::run_test
);