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 "filenames.h" /* for DOSish file names */
47 #include "complaints.h"
48 #include "dwarf2expr.h"
49 #include "dwarf2loc.h"
50 #include "cp-support.h"
56 #include "typeprint.h"
58 #include "gdbsupport/vec.h"
62 #include "gdbcore.h" /* for gnutarget */
63 #include "gdb/gdb-index.h"
68 #include "namespace.h"
69 #include "gdbsupport/function-view.h"
70 #include "gdbsupport/gdb_optional.h"
71 #include "gdbsupport/underlying.h"
72 #include "gdbsupport/hash_enum.h"
73 #include "filename-seen-cache.h"
77 #include <unordered_map>
78 #include "gdbsupport/selftest.h"
79 #include "rust-lang.h"
80 #include "gdbsupport/pathstuff.h"
82 /* When == 1, print basic high level tracing messages.
83 When > 1, be more verbose.
84 This is in contrast to the low level DIE reading of dwarf_die_debug. */
85 static unsigned int dwarf_read_debug
= 0;
87 /* When non-zero, dump DIEs after they are read in. */
88 static unsigned int dwarf_die_debug
= 0;
90 /* When non-zero, dump line number entries as they are read in. */
91 static unsigned int dwarf_line_debug
= 0;
93 /* When true, cross-check physname against demangler. */
94 static bool check_physname
= false;
96 /* When true, do not reject deprecated .gdb_index sections. */
97 static bool use_deprecated_index_sections
= false;
99 static const struct objfile_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
101 /* The "aclass" indices for various kinds of computed DWARF symbols. */
103 static int dwarf2_locexpr_index
;
104 static int dwarf2_loclist_index
;
105 static int dwarf2_locexpr_block_index
;
106 static int dwarf2_loclist_block_index
;
108 /* An index into a (C++) symbol name component in a symbol name as
109 recorded in the mapped_index's symbol table. For each C++ symbol
110 in the symbol table, we record one entry for the start of each
111 component in the symbol in a table of name components, and then
112 sort the table, in order to be able to binary search symbol names,
113 ignoring leading namespaces, both completion and regular look up.
114 For example, for symbol "A::B::C", we'll have an entry that points
115 to "A::B::C", another that points to "B::C", and another for "C".
116 Note that function symbols in GDB index have no parameter
117 information, just the function/method names. You can convert a
118 name_component to a "const char *" using the
119 'mapped_index::symbol_name_at(offset_type)' method. */
121 struct name_component
123 /* Offset in the symbol name where the component starts. Stored as
124 a (32-bit) offset instead of a pointer to save memory and improve
125 locality on 64-bit architectures. */
126 offset_type name_offset
;
128 /* The symbol's index in the symbol and constant pool tables of a
133 /* Base class containing bits shared by both .gdb_index and
134 .debug_name indexes. */
136 struct mapped_index_base
138 mapped_index_base () = default;
139 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
141 /* The name_component table (a sorted vector). See name_component's
142 description above. */
143 std::vector
<name_component
> name_components
;
145 /* How NAME_COMPONENTS is sorted. */
146 enum case_sensitivity name_components_casing
;
148 /* Return the number of names in the symbol table. */
149 virtual size_t symbol_name_count () const = 0;
151 /* Get the name of the symbol at IDX in the symbol table. */
152 virtual const char *symbol_name_at (offset_type idx
) const = 0;
154 /* Return whether the name at IDX in the symbol table should be
156 virtual bool symbol_name_slot_invalid (offset_type idx
) const
161 /* Build the symbol name component sorted vector, if we haven't
163 void build_name_components ();
165 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
166 possible matches for LN_NO_PARAMS in the name component
168 std::pair
<std::vector
<name_component
>::const_iterator
,
169 std::vector
<name_component
>::const_iterator
>
170 find_name_components_bounds (const lookup_name_info
&ln_no_params
,
171 enum language lang
) const;
173 /* Prevent deleting/destroying via a base class pointer. */
175 ~mapped_index_base() = default;
178 /* A description of the mapped index. The file format is described in
179 a comment by the code that writes the index. */
180 struct mapped_index final
: public mapped_index_base
182 /* A slot/bucket in the symbol table hash. */
183 struct symbol_table_slot
185 const offset_type name
;
186 const offset_type vec
;
189 /* Index data format version. */
192 /* The address table data. */
193 gdb::array_view
<const gdb_byte
> address_table
;
195 /* The symbol table, implemented as a hash table. */
196 gdb::array_view
<symbol_table_slot
> symbol_table
;
198 /* A pointer to the constant pool. */
199 const char *constant_pool
= nullptr;
201 bool symbol_name_slot_invalid (offset_type idx
) const override
203 const auto &bucket
= this->symbol_table
[idx
];
204 return bucket
.name
== 0 && bucket
.vec
== 0;
207 /* Convenience method to get at the name of the symbol at IDX in the
209 const char *symbol_name_at (offset_type idx
) const override
210 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
212 size_t symbol_name_count () const override
213 { return this->symbol_table
.size (); }
216 /* A description of the mapped .debug_names.
217 Uninitialized map has CU_COUNT 0. */
218 struct mapped_debug_names final
: public mapped_index_base
220 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
221 : dwarf2_per_objfile (dwarf2_per_objfile_
)
224 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
225 bfd_endian dwarf5_byte_order
;
226 bool dwarf5_is_dwarf64
;
227 bool augmentation_is_gdb
;
229 uint32_t cu_count
= 0;
230 uint32_t tu_count
, bucket_count
, name_count
;
231 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
232 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
233 const gdb_byte
*name_table_string_offs_reordered
;
234 const gdb_byte
*name_table_entry_offs_reordered
;
235 const gdb_byte
*entry_pool
;
242 /* Attribute name DW_IDX_*. */
245 /* Attribute form DW_FORM_*. */
248 /* Value if FORM is DW_FORM_implicit_const. */
249 LONGEST implicit_const
;
251 std::vector
<attr
> attr_vec
;
254 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
256 const char *namei_to_name (uint32_t namei
) const;
258 /* Implementation of the mapped_index_base virtual interface, for
259 the name_components cache. */
261 const char *symbol_name_at (offset_type idx
) const override
262 { return namei_to_name (idx
); }
264 size_t symbol_name_count () const override
265 { return this->name_count
; }
268 /* See dwarf2read.h. */
271 get_dwarf2_per_objfile (struct objfile
*objfile
)
273 return dwarf2_objfile_data_key
.get (objfile
);
276 /* Default names of the debugging sections. */
278 /* Note that if the debugging section has been compressed, it might
279 have a name like .zdebug_info. */
281 static const struct dwarf2_debug_sections dwarf2_elf_names
=
283 { ".debug_info", ".zdebug_info" },
284 { ".debug_abbrev", ".zdebug_abbrev" },
285 { ".debug_line", ".zdebug_line" },
286 { ".debug_loc", ".zdebug_loc" },
287 { ".debug_loclists", ".zdebug_loclists" },
288 { ".debug_macinfo", ".zdebug_macinfo" },
289 { ".debug_macro", ".zdebug_macro" },
290 { ".debug_str", ".zdebug_str" },
291 { ".debug_line_str", ".zdebug_line_str" },
292 { ".debug_ranges", ".zdebug_ranges" },
293 { ".debug_rnglists", ".zdebug_rnglists" },
294 { ".debug_types", ".zdebug_types" },
295 { ".debug_addr", ".zdebug_addr" },
296 { ".debug_frame", ".zdebug_frame" },
297 { ".eh_frame", NULL
},
298 { ".gdb_index", ".zgdb_index" },
299 { ".debug_names", ".zdebug_names" },
300 { ".debug_aranges", ".zdebug_aranges" },
304 /* List of DWO/DWP sections. */
306 static const struct dwop_section_names
308 struct dwarf2_section_names abbrev_dwo
;
309 struct dwarf2_section_names info_dwo
;
310 struct dwarf2_section_names line_dwo
;
311 struct dwarf2_section_names loc_dwo
;
312 struct dwarf2_section_names loclists_dwo
;
313 struct dwarf2_section_names macinfo_dwo
;
314 struct dwarf2_section_names macro_dwo
;
315 struct dwarf2_section_names str_dwo
;
316 struct dwarf2_section_names str_offsets_dwo
;
317 struct dwarf2_section_names types_dwo
;
318 struct dwarf2_section_names cu_index
;
319 struct dwarf2_section_names tu_index
;
323 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
324 { ".debug_info.dwo", ".zdebug_info.dwo" },
325 { ".debug_line.dwo", ".zdebug_line.dwo" },
326 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
327 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
328 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
329 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
330 { ".debug_str.dwo", ".zdebug_str.dwo" },
331 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
332 { ".debug_types.dwo", ".zdebug_types.dwo" },
333 { ".debug_cu_index", ".zdebug_cu_index" },
334 { ".debug_tu_index", ".zdebug_tu_index" },
337 /* local data types */
339 /* The data in a compilation unit header, after target2host
340 translation, looks like this. */
341 struct comp_unit_head
345 unsigned char addr_size
;
346 unsigned char signed_addr_p
;
347 sect_offset abbrev_sect_off
;
349 /* Size of file offsets; either 4 or 8. */
350 unsigned int offset_size
;
352 /* Size of the length field; either 4 or 12. */
353 unsigned int initial_length_size
;
355 enum dwarf_unit_type unit_type
;
357 /* Offset to the first byte of this compilation unit header in the
358 .debug_info section, for resolving relative reference dies. */
359 sect_offset sect_off
;
361 /* Offset to first die in this cu from the start of the cu.
362 This will be the first byte following the compilation unit header. */
363 cu_offset first_die_cu_offset
;
366 /* 64-bit signature of this unit. For type units, it denotes the signature of
367 the type (DW_UT_type in DWARF 4, additionally DW_UT_split_type in DWARF 5).
368 Also used in DWARF 5, to denote the dwo id when the unit type is
369 DW_UT_skeleton or DW_UT_split_compile. */
372 /* For types, offset in the type's DIE of the type defined by this TU. */
373 cu_offset type_cu_offset_in_tu
;
376 /* Type used for delaying computation of method physnames.
377 See comments for compute_delayed_physnames. */
378 struct delayed_method_info
380 /* The type to which the method is attached, i.e., its parent class. */
383 /* The index of the method in the type's function fieldlists. */
386 /* The index of the method in the fieldlist. */
389 /* The name of the DIE. */
392 /* The DIE associated with this method. */
393 struct die_info
*die
;
396 /* Internal state when decoding a particular compilation unit. */
399 explicit dwarf2_cu (struct dwarf2_per_cu_data
*per_cu
);
402 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
404 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
405 Create the set of symtabs used by this TU, or if this TU is sharing
406 symtabs with another TU and the symtabs have already been created
407 then restore those symtabs in the line header.
408 We don't need the pc/line-number mapping for type units. */
409 void setup_type_unit_groups (struct die_info
*die
);
411 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
412 buildsym_compunit constructor. */
413 struct compunit_symtab
*start_symtab (const char *name
,
414 const char *comp_dir
,
417 /* Reset the builder. */
418 void reset_builder () { m_builder
.reset (); }
420 /* The header of the compilation unit. */
421 struct comp_unit_head header
{};
423 /* Base address of this compilation unit. */
424 CORE_ADDR base_address
= 0;
426 /* Non-zero if base_address has been set. */
429 /* The language we are debugging. */
430 enum language language
= language_unknown
;
431 const struct language_defn
*language_defn
= nullptr;
433 const char *producer
= nullptr;
436 /* The symtab builder for this CU. This is only non-NULL when full
437 symbols are being read. */
438 std::unique_ptr
<buildsym_compunit
> m_builder
;
441 /* The generic symbol table building routines have separate lists for
442 file scope symbols and all all other scopes (local scopes). So
443 we need to select the right one to pass to add_symbol_to_list().
444 We do it by keeping a pointer to the correct list in list_in_scope.
446 FIXME: The original dwarf code just treated the file scope as the
447 first local scope, and all other local scopes as nested local
448 scopes, and worked fine. Check to see if we really need to
449 distinguish these in buildsym.c. */
450 struct pending
**list_in_scope
= nullptr;
452 /* Hash table holding all the loaded partial DIEs
453 with partial_die->offset.SECT_OFF as hash. */
454 htab_t partial_dies
= nullptr;
456 /* Storage for things with the same lifetime as this read-in compilation
457 unit, including partial DIEs. */
458 auto_obstack comp_unit_obstack
;
460 /* When multiple dwarf2_cu structures are living in memory, this field
461 chains them all together, so that they can be released efficiently.
462 We will probably also want a generation counter so that most-recently-used
463 compilation units are cached... */
464 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
466 /* Backlink to our per_cu entry. */
467 struct dwarf2_per_cu_data
*per_cu
;
469 /* How many compilation units ago was this CU last referenced? */
472 /* A hash table of DIE cu_offset for following references with
473 die_info->offset.sect_off as hash. */
474 htab_t die_hash
= nullptr;
476 /* Full DIEs if read in. */
477 struct die_info
*dies
= nullptr;
479 /* A set of pointers to dwarf2_per_cu_data objects for compilation
480 units referenced by this one. Only set during full symbol processing;
481 partial symbol tables do not have dependencies. */
482 htab_t dependencies
= nullptr;
484 /* Header data from the line table, during full symbol processing. */
485 struct line_header
*line_header
= nullptr;
486 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
487 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
488 this is the DW_TAG_compile_unit die for this CU. We'll hold on
489 to the line header as long as this DIE is being processed. See
490 process_die_scope. */
491 die_info
*line_header_die_owner
= nullptr;
493 /* A list of methods which need to have physnames computed
494 after all type information has been read. */
495 std::vector
<delayed_method_info
> method_list
;
497 /* To be copied to symtab->call_site_htab. */
498 htab_t call_site_htab
= nullptr;
500 /* Non-NULL if this CU came from a DWO file.
501 There is an invariant here that is important to remember:
502 Except for attributes copied from the top level DIE in the "main"
503 (or "stub") file in preparation for reading the DWO file
504 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
505 Either there isn't a DWO file (in which case this is NULL and the point
506 is moot), or there is and either we're not going to read it (in which
507 case this is NULL) or there is and we are reading it (in which case this
509 struct dwo_unit
*dwo_unit
= nullptr;
511 /* The DW_AT_addr_base attribute if present, zero otherwise
512 (zero is a valid value though).
513 Note this value comes from the Fission stub CU/TU's DIE. */
514 ULONGEST addr_base
= 0;
516 /* The DW_AT_ranges_base attribute if present, zero otherwise
517 (zero is a valid value though).
518 Note this value comes from the Fission stub CU/TU's DIE.
519 Also note that the value is zero in the non-DWO case so this value can
520 be used without needing to know whether DWO files are in use or not.
521 N.B. This does not apply to DW_AT_ranges appearing in
522 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
523 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
524 DW_AT_ranges_base *would* have to be applied, and we'd have to care
525 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
526 ULONGEST ranges_base
= 0;
528 /* When reading debug info generated by older versions of rustc, we
529 have to rewrite some union types to be struct types with a
530 variant part. This rewriting must be done after the CU is fully
531 read in, because otherwise at the point of rewriting some struct
532 type might not have been fully processed. So, we keep a list of
533 all such types here and process them after expansion. */
534 std::vector
<struct type
*> rust_unions
;
536 /* Mark used when releasing cached dies. */
539 /* This CU references .debug_loc. See the symtab->locations_valid field.
540 This test is imperfect as there may exist optimized debug code not using
541 any location list and still facing inlining issues if handled as
542 unoptimized code. For a future better test see GCC PR other/32998. */
543 bool has_loclist
: 1;
545 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
546 if all the producer_is_* fields are valid. This information is cached
547 because profiling CU expansion showed excessive time spent in
548 producer_is_gxx_lt_4_6. */
549 bool checked_producer
: 1;
550 bool producer_is_gxx_lt_4_6
: 1;
551 bool producer_is_gcc_lt_4_3
: 1;
552 bool producer_is_icc
: 1;
553 bool producer_is_icc_lt_14
: 1;
554 bool producer_is_codewarrior
: 1;
556 /* When true, the file that we're processing is known to have
557 debugging info for C++ namespaces. GCC 3.3.x did not produce
558 this information, but later versions do. */
560 bool processing_has_namespace_info
: 1;
562 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
564 /* If this CU was inherited by another CU (via specification,
565 abstract_origin, etc), this is the ancestor CU. */
568 /* Get the buildsym_compunit for this CU. */
569 buildsym_compunit
*get_builder ()
571 /* If this CU has a builder associated with it, use that. */
572 if (m_builder
!= nullptr)
573 return m_builder
.get ();
575 /* Otherwise, search ancestors for a valid builder. */
576 if (ancestor
!= nullptr)
577 return ancestor
->get_builder ();
583 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
584 This includes type_unit_group and quick_file_names. */
586 struct stmt_list_hash
588 /* The DWO unit this table is from or NULL if there is none. */
589 struct dwo_unit
*dwo_unit
;
591 /* Offset in .debug_line or .debug_line.dwo. */
592 sect_offset line_sect_off
;
595 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
596 an object of this type. */
598 struct type_unit_group
600 /* dwarf2read.c's main "handle" on a TU symtab.
601 To simplify things we create an artificial CU that "includes" all the
602 type units using this stmt_list so that the rest of the code still has
603 a "per_cu" handle on the symtab.
604 This PER_CU is recognized by having no section. */
605 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
606 struct dwarf2_per_cu_data per_cu
;
608 /* The TUs that share this DW_AT_stmt_list entry.
609 This is added to while parsing type units to build partial symtabs,
610 and is deleted afterwards and not used again. */
611 std::vector
<signatured_type
*> *tus
;
613 /* The compunit symtab.
614 Type units in a group needn't all be defined in the same source file,
615 so we create an essentially anonymous symtab as the compunit symtab. */
616 struct compunit_symtab
*compunit_symtab
;
618 /* The data used to construct the hash key. */
619 struct stmt_list_hash hash
;
621 /* The number of symtabs from the line header.
622 The value here must match line_header.num_file_names. */
623 unsigned int num_symtabs
;
625 /* The symbol tables for this TU (obtained from the files listed in
627 WARNING: The order of entries here must match the order of entries
628 in the line header. After the first TU using this type_unit_group, the
629 line header for the subsequent TUs is recreated from this. This is done
630 because we need to use the same symtabs for each TU using the same
631 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
632 there's no guarantee the line header doesn't have duplicate entries. */
633 struct symtab
**symtabs
;
636 /* These sections are what may appear in a (real or virtual) DWO file. */
640 struct dwarf2_section_info abbrev
;
641 struct dwarf2_section_info line
;
642 struct dwarf2_section_info loc
;
643 struct dwarf2_section_info loclists
;
644 struct dwarf2_section_info macinfo
;
645 struct dwarf2_section_info macro
;
646 struct dwarf2_section_info str
;
647 struct dwarf2_section_info str_offsets
;
648 /* In the case of a virtual DWO file, these two are unused. */
649 struct dwarf2_section_info info
;
650 std::vector
<dwarf2_section_info
> types
;
653 /* CUs/TUs in DWP/DWO files. */
657 /* Backlink to the containing struct dwo_file. */
658 struct dwo_file
*dwo_file
;
660 /* The "id" that distinguishes this CU/TU.
661 .debug_info calls this "dwo_id", .debug_types calls this "signature".
662 Since signatures came first, we stick with it for consistency. */
665 /* The section this CU/TU lives in, in the DWO file. */
666 struct dwarf2_section_info
*section
;
668 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
669 sect_offset sect_off
;
672 /* For types, offset in the type's DIE of the type defined by this TU. */
673 cu_offset type_offset_in_tu
;
676 /* include/dwarf2.h defines the DWP section codes.
677 It defines a max value but it doesn't define a min value, which we
678 use for error checking, so provide one. */
680 enum dwp_v2_section_ids
685 /* Data for one DWO file.
687 This includes virtual DWO files (a virtual DWO file is a DWO file as it
688 appears in a DWP file). DWP files don't really have DWO files per se -
689 comdat folding of types "loses" the DWO file they came from, and from
690 a high level view DWP files appear to contain a mass of random types.
691 However, to maintain consistency with the non-DWP case we pretend DWP
692 files contain virtual DWO files, and we assign each TU with one virtual
693 DWO file (generally based on the line and abbrev section offsets -
694 a heuristic that seems to work in practice). */
698 dwo_file () = default;
699 DISABLE_COPY_AND_ASSIGN (dwo_file
);
701 /* The DW_AT_GNU_dwo_name attribute.
702 For virtual DWO files the name is constructed from the section offsets
703 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
704 from related CU+TUs. */
705 const char *dwo_name
= nullptr;
707 /* The DW_AT_comp_dir attribute. */
708 const char *comp_dir
= nullptr;
710 /* The bfd, when the file is open. Otherwise this is NULL.
711 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
712 gdb_bfd_ref_ptr dbfd
;
714 /* The sections that make up this DWO file.
715 Remember that for virtual DWO files in DWP V2, these are virtual
716 sections (for lack of a better name). */
717 struct dwo_sections sections
{};
719 /* The CUs in the file.
720 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
721 an extension to handle LLVM's Link Time Optimization output (where
722 multiple source files may be compiled into a single object/dwo pair). */
725 /* Table of TUs in the file.
726 Each element is a struct dwo_unit. */
730 /* These sections are what may appear in a DWP file. */
734 /* These are used by both DWP version 1 and 2. */
735 struct dwarf2_section_info str
;
736 struct dwarf2_section_info cu_index
;
737 struct dwarf2_section_info tu_index
;
739 /* These are only used by DWP version 2 files.
740 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
741 sections are referenced by section number, and are not recorded here.
742 In DWP version 2 there is at most one copy of all these sections, each
743 section being (effectively) comprised of the concatenation of all of the
744 individual sections that exist in the version 1 format.
745 To keep the code simple we treat each of these concatenated pieces as a
746 section itself (a virtual section?). */
747 struct dwarf2_section_info abbrev
;
748 struct dwarf2_section_info info
;
749 struct dwarf2_section_info line
;
750 struct dwarf2_section_info loc
;
751 struct dwarf2_section_info macinfo
;
752 struct dwarf2_section_info macro
;
753 struct dwarf2_section_info str_offsets
;
754 struct dwarf2_section_info types
;
757 /* These sections are what may appear in a virtual DWO file in DWP version 1.
758 A virtual DWO file is a DWO file as it appears in a DWP file. */
760 struct virtual_v1_dwo_sections
762 struct dwarf2_section_info abbrev
;
763 struct dwarf2_section_info line
;
764 struct dwarf2_section_info loc
;
765 struct dwarf2_section_info macinfo
;
766 struct dwarf2_section_info macro
;
767 struct dwarf2_section_info str_offsets
;
768 /* Each DWP hash table entry records one CU or one TU.
769 That is recorded here, and copied to dwo_unit.section. */
770 struct dwarf2_section_info info_or_types
;
773 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
774 In version 2, the sections of the DWO files are concatenated together
775 and stored in one section of that name. Thus each ELF section contains
776 several "virtual" sections. */
778 struct virtual_v2_dwo_sections
780 bfd_size_type abbrev_offset
;
781 bfd_size_type abbrev_size
;
783 bfd_size_type line_offset
;
784 bfd_size_type line_size
;
786 bfd_size_type loc_offset
;
787 bfd_size_type loc_size
;
789 bfd_size_type macinfo_offset
;
790 bfd_size_type macinfo_size
;
792 bfd_size_type macro_offset
;
793 bfd_size_type macro_size
;
795 bfd_size_type str_offsets_offset
;
796 bfd_size_type str_offsets_size
;
798 /* Each DWP hash table entry records one CU or one TU.
799 That is recorded here, and copied to dwo_unit.section. */
800 bfd_size_type info_or_types_offset
;
801 bfd_size_type info_or_types_size
;
804 /* Contents of DWP hash tables. */
806 struct dwp_hash_table
808 uint32_t version
, nr_columns
;
809 uint32_t nr_units
, nr_slots
;
810 const gdb_byte
*hash_table
, *unit_table
;
815 const gdb_byte
*indices
;
819 /* This is indexed by column number and gives the id of the section
821 #define MAX_NR_V2_DWO_SECTIONS \
822 (1 /* .debug_info or .debug_types */ \
823 + 1 /* .debug_abbrev */ \
824 + 1 /* .debug_line */ \
825 + 1 /* .debug_loc */ \
826 + 1 /* .debug_str_offsets */ \
827 + 1 /* .debug_macro or .debug_macinfo */)
828 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
829 const gdb_byte
*offsets
;
830 const gdb_byte
*sizes
;
835 /* Data for one DWP file. */
839 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
841 dbfd (std::move (abfd
))
845 /* Name of the file. */
848 /* File format version. */
852 gdb_bfd_ref_ptr dbfd
;
854 /* Section info for this file. */
855 struct dwp_sections sections
{};
857 /* Table of CUs in the file. */
858 const struct dwp_hash_table
*cus
= nullptr;
860 /* Table of TUs in the file. */
861 const struct dwp_hash_table
*tus
= nullptr;
863 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
864 htab_t loaded_cus
{};
865 htab_t loaded_tus
{};
867 /* Table to map ELF section numbers to their sections.
868 This is only needed for the DWP V1 file format. */
869 unsigned int num_sections
= 0;
870 asection
**elf_sections
= nullptr;
873 /* Struct used to pass misc. parameters to read_die_and_children, et
874 al. which are used for both .debug_info and .debug_types dies.
875 All parameters here are unchanging for the life of the call. This
876 struct exists to abstract away the constant parameters of die reading. */
878 struct die_reader_specs
880 /* The bfd of die_section. */
883 /* The CU of the DIE we are parsing. */
884 struct dwarf2_cu
*cu
;
886 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
887 struct dwo_file
*dwo_file
;
889 /* The section the die comes from.
890 This is either .debug_info or .debug_types, or the .dwo variants. */
891 struct dwarf2_section_info
*die_section
;
893 /* die_section->buffer. */
894 const gdb_byte
*buffer
;
896 /* The end of the buffer. */
897 const gdb_byte
*buffer_end
;
899 /* The value of the DW_AT_comp_dir attribute. */
900 const char *comp_dir
;
902 /* The abbreviation table to use when reading the DIEs. */
903 struct abbrev_table
*abbrev_table
;
906 /* Type of function passed to init_cutu_and_read_dies, et.al. */
907 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
908 const gdb_byte
*info_ptr
,
909 struct die_info
*comp_unit_die
,
913 /* A 1-based directory index. This is a strong typedef to prevent
914 accidentally using a directory index as a 0-based index into an
916 enum class dir_index
: unsigned int {};
918 /* Likewise, a 1-based file name index. */
919 enum class file_name_index
: unsigned int {};
923 file_entry () = default;
925 file_entry (const char *name_
, dir_index d_index_
,
926 unsigned int mod_time_
, unsigned int length_
)
929 mod_time (mod_time_
),
933 /* Return the include directory at D_INDEX stored in LH. Returns
934 NULL if D_INDEX is out of bounds. */
935 const char *include_dir (const line_header
*lh
) const;
937 /* The file name. Note this is an observing pointer. The memory is
938 owned by debug_line_buffer. */
941 /* The directory index (1-based). */
942 dir_index d_index
{};
944 unsigned int mod_time
{};
946 unsigned int length
{};
948 /* True if referenced by the Line Number Program. */
951 /* The associated symbol table, if any. */
952 struct symtab
*symtab
{};
955 /* The line number information for a compilation unit (found in the
956 .debug_line section) begins with a "statement program header",
957 which contains the following information. */
964 /* Add an entry to the include directory table. */
965 void add_include_dir (const char *include_dir
);
967 /* Add an entry to the file name table. */
968 void add_file_name (const char *name
, dir_index d_index
,
969 unsigned int mod_time
, unsigned int length
);
971 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
973 const char *include_dir_at (dir_index index
) const
975 /* Convert directory index number (1-based) to vector index
977 size_t vec_index
= to_underlying (index
) - 1;
979 if (vec_index
>= include_dirs
.size ())
981 return include_dirs
[vec_index
];
984 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
986 file_entry
*file_name_at (file_name_index index
)
988 /* Convert file name index number (1-based) to vector index
990 size_t vec_index
= to_underlying (index
) - 1;
992 if (vec_index
>= file_names
.size ())
994 return &file_names
[vec_index
];
997 /* Offset of line number information in .debug_line section. */
998 sect_offset sect_off
{};
1000 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1001 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1003 unsigned int total_length
{};
1004 unsigned short version
{};
1005 unsigned int header_length
{};
1006 unsigned char minimum_instruction_length
{};
1007 unsigned char maximum_ops_per_instruction
{};
1008 unsigned char default_is_stmt
{};
1010 unsigned char line_range
{};
1011 unsigned char opcode_base
{};
1013 /* standard_opcode_lengths[i] is the number of operands for the
1014 standard opcode whose value is i. This means that
1015 standard_opcode_lengths[0] is unused, and the last meaningful
1016 element is standard_opcode_lengths[opcode_base - 1]. */
1017 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1019 /* The include_directories table. Note these are observing
1020 pointers. The memory is owned by debug_line_buffer. */
1021 std::vector
<const char *> include_dirs
;
1023 /* The file_names table. */
1024 std::vector
<file_entry
> file_names
;
1026 /* The start and end of the statement program following this
1027 header. These point into dwarf2_per_objfile->line_buffer. */
1028 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1031 typedef std::unique_ptr
<line_header
> line_header_up
;
1034 file_entry::include_dir (const line_header
*lh
) const
1036 return lh
->include_dir_at (d_index
);
1039 /* When we construct a partial symbol table entry we only
1040 need this much information. */
1041 struct partial_die_info
: public allocate_on_obstack
1043 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1045 /* Disable assign but still keep copy ctor, which is needed
1046 load_partial_dies. */
1047 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1049 /* Adjust the partial die before generating a symbol for it. This
1050 function may set the is_external flag or change the DIE's
1052 void fixup (struct dwarf2_cu
*cu
);
1054 /* Read a minimal amount of information into the minimal die
1056 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1057 const struct abbrev_info
&abbrev
,
1058 const gdb_byte
*info_ptr
);
1060 /* Offset of this DIE. */
1061 const sect_offset sect_off
;
1063 /* DWARF-2 tag for this DIE. */
1064 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1066 /* Assorted flags describing the data found in this DIE. */
1067 const unsigned int has_children
: 1;
1069 unsigned int is_external
: 1;
1070 unsigned int is_declaration
: 1;
1071 unsigned int has_type
: 1;
1072 unsigned int has_specification
: 1;
1073 unsigned int has_pc_info
: 1;
1074 unsigned int may_be_inlined
: 1;
1076 /* This DIE has been marked DW_AT_main_subprogram. */
1077 unsigned int main_subprogram
: 1;
1079 /* Flag set if the SCOPE field of this structure has been
1081 unsigned int scope_set
: 1;
1083 /* Flag set if the DIE has a byte_size attribute. */
1084 unsigned int has_byte_size
: 1;
1086 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1087 unsigned int has_const_value
: 1;
1089 /* Flag set if any of the DIE's children are template arguments. */
1090 unsigned int has_template_arguments
: 1;
1092 /* Flag set if fixup has been called on this die. */
1093 unsigned int fixup_called
: 1;
1095 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1096 unsigned int is_dwz
: 1;
1098 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1099 unsigned int spec_is_dwz
: 1;
1101 /* The name of this DIE. Normally the value of DW_AT_name, but
1102 sometimes a default name for unnamed DIEs. */
1103 const char *name
= nullptr;
1105 /* The linkage name, if present. */
1106 const char *linkage_name
= nullptr;
1108 /* The scope to prepend to our children. This is generally
1109 allocated on the comp_unit_obstack, so will disappear
1110 when this compilation unit leaves the cache. */
1111 const char *scope
= nullptr;
1113 /* Some data associated with the partial DIE. The tag determines
1114 which field is live. */
1117 /* The location description associated with this DIE, if any. */
1118 struct dwarf_block
*locdesc
;
1119 /* The offset of an import, for DW_TAG_imported_unit. */
1120 sect_offset sect_off
;
1123 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1124 CORE_ADDR lowpc
= 0;
1125 CORE_ADDR highpc
= 0;
1127 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1128 DW_AT_sibling, if any. */
1129 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1130 could return DW_AT_sibling values to its caller load_partial_dies. */
1131 const gdb_byte
*sibling
= nullptr;
1133 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1134 DW_AT_specification (or DW_AT_abstract_origin or
1135 DW_AT_extension). */
1136 sect_offset spec_offset
{};
1138 /* Pointers to this DIE's parent, first child, and next sibling,
1140 struct partial_die_info
*die_parent
= nullptr;
1141 struct partial_die_info
*die_child
= nullptr;
1142 struct partial_die_info
*die_sibling
= nullptr;
1144 friend struct partial_die_info
*
1145 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1148 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1149 partial_die_info (sect_offset sect_off
)
1150 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1154 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1156 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1161 has_specification
= 0;
1164 main_subprogram
= 0;
1167 has_const_value
= 0;
1168 has_template_arguments
= 0;
1175 /* This data structure holds the information of an abbrev. */
1178 unsigned int number
; /* number identifying abbrev */
1179 enum dwarf_tag tag
; /* dwarf tag */
1180 unsigned short has_children
; /* boolean */
1181 unsigned short num_attrs
; /* number of attributes */
1182 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1183 struct abbrev_info
*next
; /* next in chain */
1188 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1189 ENUM_BITFIELD(dwarf_form
) form
: 16;
1191 /* It is valid only if FORM is DW_FORM_implicit_const. */
1192 LONGEST implicit_const
;
1195 /* Size of abbrev_table.abbrev_hash_table. */
1196 #define ABBREV_HASH_SIZE 121
1198 /* Top level data structure to contain an abbreviation table. */
1202 explicit abbrev_table (sect_offset off
)
1206 XOBNEWVEC (&abbrev_obstack
, struct abbrev_info
*, ABBREV_HASH_SIZE
);
1207 memset (m_abbrevs
, 0, ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
1210 DISABLE_COPY_AND_ASSIGN (abbrev_table
);
1212 /* Allocate space for a struct abbrev_info object in
1214 struct abbrev_info
*alloc_abbrev ();
1216 /* Add an abbreviation to the table. */
1217 void add_abbrev (unsigned int abbrev_number
, struct abbrev_info
*abbrev
);
1219 /* Look up an abbrev in the table.
1220 Returns NULL if the abbrev is not found. */
1222 struct abbrev_info
*lookup_abbrev (unsigned int abbrev_number
);
1225 /* Where the abbrev table came from.
1226 This is used as a sanity check when the table is used. */
1227 const sect_offset sect_off
;
1229 /* Storage for the abbrev table. */
1230 auto_obstack abbrev_obstack
;
1234 /* Hash table of abbrevs.
1235 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1236 It could be statically allocated, but the previous code didn't so we
1238 struct abbrev_info
**m_abbrevs
;
1241 typedef std::unique_ptr
<struct abbrev_table
> abbrev_table_up
;
1243 /* Attributes have a name and a value. */
1246 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1247 ENUM_BITFIELD(dwarf_form
) form
: 15;
1249 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1250 field should be in u.str (existing only for DW_STRING) but it is kept
1251 here for better struct attribute alignment. */
1252 unsigned int string_is_canonical
: 1;
1257 struct dwarf_block
*blk
;
1266 /* This data structure holds a complete die structure. */
1269 /* DWARF-2 tag for this DIE. */
1270 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1272 /* Number of attributes */
1273 unsigned char num_attrs
;
1275 /* True if we're presently building the full type name for the
1276 type derived from this DIE. */
1277 unsigned char building_fullname
: 1;
1279 /* True if this die is in process. PR 16581. */
1280 unsigned char in_process
: 1;
1283 unsigned int abbrev
;
1285 /* Offset in .debug_info or .debug_types section. */
1286 sect_offset sect_off
;
1288 /* The dies in a compilation unit form an n-ary tree. PARENT
1289 points to this die's parent; CHILD points to the first child of
1290 this node; and all the children of a given node are chained
1291 together via their SIBLING fields. */
1292 struct die_info
*child
; /* Its first child, if any. */
1293 struct die_info
*sibling
; /* Its next sibling, if any. */
1294 struct die_info
*parent
; /* Its parent, if any. */
1296 /* An array of attributes, with NUM_ATTRS elements. There may be
1297 zero, but it's not common and zero-sized arrays are not
1298 sufficiently portable C. */
1299 struct attribute attrs
[1];
1302 /* Get at parts of an attribute structure. */
1304 #define DW_STRING(attr) ((attr)->u.str)
1305 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1306 #define DW_UNSND(attr) ((attr)->u.unsnd)
1307 #define DW_BLOCK(attr) ((attr)->u.blk)
1308 #define DW_SND(attr) ((attr)->u.snd)
1309 #define DW_ADDR(attr) ((attr)->u.addr)
1310 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1312 /* Blocks are a bunch of untyped bytes. */
1317 /* Valid only if SIZE is not zero. */
1318 const gdb_byte
*data
;
1321 #ifndef ATTR_ALLOC_CHUNK
1322 #define ATTR_ALLOC_CHUNK 4
1325 /* Allocate fields for structs, unions and enums in this size. */
1326 #ifndef DW_FIELD_ALLOC_CHUNK
1327 #define DW_FIELD_ALLOC_CHUNK 4
1330 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1331 but this would require a corresponding change in unpack_field_as_long
1333 static int bits_per_byte
= 8;
1335 /* When reading a variant or variant part, we track a bit more
1336 information about the field, and store it in an object of this
1339 struct variant_field
1341 /* If we see a DW_TAG_variant, then this will be the discriminant
1343 ULONGEST discriminant_value
;
1344 /* If we see a DW_TAG_variant, then this will be set if this is the
1346 bool default_branch
;
1347 /* While reading a DW_TAG_variant_part, this will be set if this
1348 field is the discriminant. */
1349 bool is_discriminant
;
1354 int accessibility
= 0;
1356 /* Extra information to describe a variant or variant part. */
1357 struct variant_field variant
{};
1358 struct field field
{};
1363 const char *name
= nullptr;
1364 std::vector
<struct fn_field
> fnfields
;
1367 /* The routines that read and process dies for a C struct or C++ class
1368 pass lists of data member fields and lists of member function fields
1369 in an instance of a field_info structure, as defined below. */
1372 /* List of data member and baseclasses fields. */
1373 std::vector
<struct nextfield
> fields
;
1374 std::vector
<struct nextfield
> baseclasses
;
1376 /* Number of fields (including baseclasses). */
1379 /* Set if the accesibility of one of the fields is not public. */
1380 int non_public_fields
= 0;
1382 /* Member function fieldlist array, contains name of possibly overloaded
1383 member function, number of overloaded member functions and a pointer
1384 to the head of the member function field chain. */
1385 std::vector
<struct fnfieldlist
> fnfieldlists
;
1387 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1388 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1389 std::vector
<struct decl_field
> typedef_field_list
;
1391 /* Nested types defined by this class and the number of elements in this
1393 std::vector
<struct decl_field
> nested_types_list
;
1396 /* One item on the queue of compilation units to read in full symbols
1398 struct dwarf2_queue_item
1400 struct dwarf2_per_cu_data
*per_cu
;
1401 enum language pretend_language
;
1402 struct dwarf2_queue_item
*next
;
1405 /* The current queue. */
1406 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1408 /* Loaded secondary compilation units are kept in memory until they
1409 have not been referenced for the processing of this many
1410 compilation units. Set this to zero to disable caching. Cache
1411 sizes of up to at least twenty will improve startup time for
1412 typical inter-CU-reference binaries, at an obvious memory cost. */
1413 static int dwarf_max_cache_age
= 5;
1415 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1416 struct cmd_list_element
*c
, const char *value
)
1418 fprintf_filtered (file
, _("The upper bound on the age of cached "
1419 "DWARF compilation units is %s.\n"),
1423 /* local function prototypes */
1425 static const char *get_section_name (const struct dwarf2_section_info
*);
1427 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1429 static void dwarf2_find_base_address (struct die_info
*die
,
1430 struct dwarf2_cu
*cu
);
1432 static struct partial_symtab
*create_partial_symtab
1433 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1435 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1436 const gdb_byte
*info_ptr
,
1437 struct die_info
*type_unit_die
,
1438 int has_children
, void *data
);
1440 static void dwarf2_build_psymtabs_hard
1441 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1443 static void scan_partial_symbols (struct partial_die_info
*,
1444 CORE_ADDR
*, CORE_ADDR
*,
1445 int, struct dwarf2_cu
*);
1447 static void add_partial_symbol (struct partial_die_info
*,
1448 struct dwarf2_cu
*);
1450 static void add_partial_namespace (struct partial_die_info
*pdi
,
1451 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1452 int set_addrmap
, struct dwarf2_cu
*cu
);
1454 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1455 CORE_ADDR
*highpc
, int set_addrmap
,
1456 struct dwarf2_cu
*cu
);
1458 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1459 struct dwarf2_cu
*cu
);
1461 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1462 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1463 int need_pc
, struct dwarf2_cu
*cu
);
1465 static void dwarf2_read_symtab (struct partial_symtab
*,
1468 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1470 static abbrev_table_up abbrev_table_read_table
1471 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, struct dwarf2_section_info
*,
1474 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1476 static struct partial_die_info
*load_partial_dies
1477 (const struct die_reader_specs
*, const gdb_byte
*, int);
1479 /* A pair of partial_die_info and compilation unit. */
1480 struct cu_partial_die_info
1482 /* The compilation unit of the partial_die_info. */
1483 struct dwarf2_cu
*cu
;
1484 /* A partial_die_info. */
1485 struct partial_die_info
*pdi
;
1487 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1493 cu_partial_die_info () = delete;
1496 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1497 struct dwarf2_cu
*);
1499 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1500 struct attribute
*, struct attr_abbrev
*,
1503 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1505 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1507 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1509 /* Read the next three bytes (little-endian order) as an unsigned integer. */
1510 static unsigned int read_3_bytes (bfd
*, const gdb_byte
*);
1512 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1514 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1516 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1519 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1521 static LONGEST read_checked_initial_length_and_offset
1522 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1523 unsigned int *, unsigned int *);
1525 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1526 const struct comp_unit_head
*,
1529 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1531 static sect_offset read_abbrev_offset
1532 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1533 struct dwarf2_section_info
*, sect_offset
);
1535 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1537 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1539 static const char *read_indirect_string
1540 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1541 const struct comp_unit_head
*, unsigned int *);
1543 static const char *read_indirect_line_string
1544 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1545 const struct comp_unit_head
*, unsigned int *);
1547 static const char *read_indirect_string_at_offset
1548 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1549 LONGEST str_offset
);
1551 static const char *read_indirect_string_from_dwz
1552 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1554 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1556 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1560 static const char *read_str_index (const struct die_reader_specs
*reader
,
1561 ULONGEST str_index
);
1563 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1565 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1566 struct dwarf2_cu
*);
1568 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1571 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1572 struct dwarf2_cu
*cu
);
1574 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1576 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1577 struct dwarf2_cu
*cu
);
1579 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1581 static struct die_info
*die_specification (struct die_info
*die
,
1582 struct dwarf2_cu
**);
1584 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1585 struct dwarf2_cu
*cu
);
1587 static void dwarf_decode_lines (struct line_header
*, const char *,
1588 struct dwarf2_cu
*, struct partial_symtab
*,
1589 CORE_ADDR
, int decode_mapping
);
1591 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1594 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1595 struct dwarf2_cu
*, struct symbol
* = NULL
);
1597 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1598 struct dwarf2_cu
*);
1600 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1603 struct obstack
*obstack
,
1604 struct dwarf2_cu
*cu
, LONGEST
*value
,
1605 const gdb_byte
**bytes
,
1606 struct dwarf2_locexpr_baton
**baton
);
1608 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1610 static int need_gnat_info (struct dwarf2_cu
*);
1612 static struct type
*die_descriptive_type (struct die_info
*,
1613 struct dwarf2_cu
*);
1615 static void set_descriptive_type (struct type
*, struct die_info
*,
1616 struct dwarf2_cu
*);
1618 static struct type
*die_containing_type (struct die_info
*,
1619 struct dwarf2_cu
*);
1621 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1622 struct dwarf2_cu
*);
1624 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1626 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1628 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1630 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1631 const char *suffix
, int physname
,
1632 struct dwarf2_cu
*cu
);
1634 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1636 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1638 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1640 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1642 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1644 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1646 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1647 struct dwarf2_cu
*, struct partial_symtab
*);
1649 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1650 values. Keep the items ordered with increasing constraints compliance. */
1653 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1654 PC_BOUNDS_NOT_PRESENT
,
1656 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1657 were present but they do not form a valid range of PC addresses. */
1660 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1663 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1667 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1668 CORE_ADDR
*, CORE_ADDR
*,
1670 struct partial_symtab
*);
1672 static void get_scope_pc_bounds (struct die_info
*,
1673 CORE_ADDR
*, CORE_ADDR
*,
1674 struct dwarf2_cu
*);
1676 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1677 CORE_ADDR
, struct dwarf2_cu
*);
1679 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1680 struct dwarf2_cu
*);
1682 static void dwarf2_attach_fields_to_type (struct field_info
*,
1683 struct type
*, struct dwarf2_cu
*);
1685 static void dwarf2_add_member_fn (struct field_info
*,
1686 struct die_info
*, struct type
*,
1687 struct dwarf2_cu
*);
1689 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1691 struct dwarf2_cu
*);
1693 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1695 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1697 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1699 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1701 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1703 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1705 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1707 static struct type
*read_module_type (struct die_info
*die
,
1708 struct dwarf2_cu
*cu
);
1710 static const char *namespace_name (struct die_info
*die
,
1711 int *is_anonymous
, struct dwarf2_cu
*);
1713 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1715 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1717 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1718 struct dwarf2_cu
*);
1720 static struct die_info
*read_die_and_siblings_1
1721 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1724 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1725 const gdb_byte
*info_ptr
,
1726 const gdb_byte
**new_info_ptr
,
1727 struct die_info
*parent
);
1729 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1730 struct die_info
**, const gdb_byte
*,
1733 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1734 struct die_info
**, const gdb_byte
*,
1737 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1739 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1742 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1744 static const char *dwarf2_full_name (const char *name
,
1745 struct die_info
*die
,
1746 struct dwarf2_cu
*cu
);
1748 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1749 struct dwarf2_cu
*cu
);
1751 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1752 struct dwarf2_cu
**);
1754 static const char *dwarf_tag_name (unsigned int);
1756 static const char *dwarf_attr_name (unsigned int);
1758 static const char *dwarf_unit_type_name (int unit_type
);
1760 static const char *dwarf_form_name (unsigned int);
1762 static const char *dwarf_bool_name (unsigned int);
1764 static const char *dwarf_type_encoding_name (unsigned int);
1766 static struct die_info
*sibling_die (struct die_info
*);
1768 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1770 static void dump_die_for_error (struct die_info
*);
1772 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1775 /*static*/ void dump_die (struct die_info
*, int max_level
);
1777 static void store_in_ref_table (struct die_info
*,
1778 struct dwarf2_cu
*);
1780 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1782 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1784 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1785 const struct attribute
*,
1786 struct dwarf2_cu
**);
1788 static struct die_info
*follow_die_ref (struct die_info
*,
1789 const struct attribute
*,
1790 struct dwarf2_cu
**);
1792 static struct die_info
*follow_die_sig (struct die_info
*,
1793 const struct attribute
*,
1794 struct dwarf2_cu
**);
1796 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1797 struct dwarf2_cu
*);
1799 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1800 const struct attribute
*,
1801 struct dwarf2_cu
*);
1803 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1805 static void read_signatured_type (struct signatured_type
*);
1807 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1808 struct die_info
*die
, struct dwarf2_cu
*cu
,
1809 struct dynamic_prop
*prop
, struct type
*type
);
1811 /* memory allocation interface */
1813 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1815 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1817 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1819 static int attr_form_is_block (const struct attribute
*);
1821 static int attr_form_is_section_offset (const struct attribute
*);
1823 static int attr_form_is_constant (const struct attribute
*);
1825 static int attr_form_is_ref (const struct attribute
*);
1827 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1828 struct dwarf2_loclist_baton
*baton
,
1829 const struct attribute
*attr
);
1831 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1833 struct dwarf2_cu
*cu
,
1836 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1837 const gdb_byte
*info_ptr
,
1838 struct abbrev_info
*abbrev
);
1840 static hashval_t
partial_die_hash (const void *item
);
1842 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1844 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1845 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1846 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1848 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1849 struct die_info
*comp_unit_die
,
1850 enum language pretend_language
);
1852 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1854 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1856 static struct type
*set_die_type (struct die_info
*, struct type
*,
1857 struct dwarf2_cu
*);
1859 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1861 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1863 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1866 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1869 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1872 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1873 struct dwarf2_per_cu_data
*);
1875 static void dwarf2_mark (struct dwarf2_cu
*);
1877 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1879 static struct type
*get_die_type_at_offset (sect_offset
,
1880 struct dwarf2_per_cu_data
*);
1882 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1884 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1885 enum language pretend_language
);
1887 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1889 static struct type
*dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data
*per_cu
);
1890 static struct type
*dwarf2_per_cu_addr_sized_int_type
1891 (struct dwarf2_per_cu_data
*per_cu
, bool unsigned_p
);
1893 /* Class, the destructor of which frees all allocated queue entries. This
1894 will only have work to do if an error was thrown while processing the
1895 dwarf. If no error was thrown then the queue entries should have all
1896 been processed, and freed, as we went along. */
1898 class dwarf2_queue_guard
1901 dwarf2_queue_guard () = default;
1903 /* Free any entries remaining on the queue. There should only be
1904 entries left if we hit an error while processing the dwarf. */
1905 ~dwarf2_queue_guard ()
1907 struct dwarf2_queue_item
*item
, *last
;
1909 item
= dwarf2_queue
;
1912 /* Anything still marked queued is likely to be in an
1913 inconsistent state, so discard it. */
1914 if (item
->per_cu
->queued
)
1916 if (item
->per_cu
->cu
!= NULL
)
1917 free_one_cached_comp_unit (item
->per_cu
);
1918 item
->per_cu
->queued
= 0;
1926 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
1930 /* The return type of find_file_and_directory. Note, the enclosed
1931 string pointers are only valid while this object is valid. */
1933 struct file_and_directory
1935 /* The filename. This is never NULL. */
1938 /* The compilation directory. NULL if not known. If we needed to
1939 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1940 points directly to the DW_AT_comp_dir string attribute owned by
1941 the obstack that owns the DIE. */
1942 const char *comp_dir
;
1944 /* If we needed to build a new string for comp_dir, this is what
1945 owns the storage. */
1946 std::string comp_dir_storage
;
1949 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1950 struct dwarf2_cu
*cu
);
1952 static char *file_full_name (int file
, struct line_header
*lh
,
1953 const char *comp_dir
);
1955 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1956 enum class rcuh_kind
{ COMPILE
, TYPE
};
1958 static const gdb_byte
*read_and_check_comp_unit_head
1959 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1960 struct comp_unit_head
*header
,
1961 struct dwarf2_section_info
*section
,
1962 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1963 rcuh_kind section_kind
);
1965 static void init_cutu_and_read_dies
1966 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1967 int use_existing_cu
, int keep
, bool skip_partial
,
1968 die_reader_func_ftype
*die_reader_func
, void *data
);
1970 static void init_cutu_and_read_dies_simple
1971 (struct dwarf2_per_cu_data
*this_cu
,
1972 die_reader_func_ftype
*die_reader_func
, void *data
);
1974 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1976 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1978 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1979 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1980 struct dwp_file
*dwp_file
, const char *comp_dir
,
1981 ULONGEST signature
, int is_debug_types
);
1983 static struct dwp_file
*get_dwp_file
1984 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1986 static struct dwo_unit
*lookup_dwo_comp_unit
1987 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1989 static struct dwo_unit
*lookup_dwo_type_unit
1990 (struct signatured_type
*, const char *, const char *);
1992 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1994 /* A unique pointer to a dwo_file. */
1996 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1998 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2000 static void check_producer (struct dwarf2_cu
*cu
);
2002 static void free_line_header_voidp (void *arg
);
2004 /* Various complaints about symbol reading that don't abort the process. */
2007 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2009 complaint (_("statement list doesn't fit in .debug_line section"));
2013 dwarf2_debug_line_missing_file_complaint (void)
2015 complaint (_(".debug_line section has line data without a file"));
2019 dwarf2_debug_line_missing_end_sequence_complaint (void)
2021 complaint (_(".debug_line section has line "
2022 "program sequence without an end"));
2026 dwarf2_complex_location_expr_complaint (void)
2028 complaint (_("location expression too complex"));
2032 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2035 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
2040 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2042 complaint (_("debug info runs off end of %s section"
2044 get_section_name (section
),
2045 get_section_file_name (section
));
2049 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2051 complaint (_("macro debug info contains a "
2052 "malformed macro definition:\n`%s'"),
2057 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2059 complaint (_("invalid attribute class or form for '%s' in '%s'"),
2063 /* Hash function for line_header_hash. */
2066 line_header_hash (const struct line_header
*ofs
)
2068 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2071 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2074 line_header_hash_voidp (const void *item
)
2076 const struct line_header
*ofs
= (const struct line_header
*) item
;
2078 return line_header_hash (ofs
);
2081 /* Equality function for line_header_hash. */
2084 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2086 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2087 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2089 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2090 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2095 /* Read the given attribute value as an address, taking the attribute's
2096 form into account. */
2099 attr_value_as_address (struct attribute
*attr
)
2103 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_addrx
2104 && attr
->form
!= DW_FORM_GNU_addr_index
)
2106 /* Aside from a few clearly defined exceptions, attributes that
2107 contain an address must always be in DW_FORM_addr form.
2108 Unfortunately, some compilers happen to be violating this
2109 requirement by encoding addresses using other forms, such
2110 as DW_FORM_data4 for example. For those broken compilers,
2111 we try to do our best, without any guarantee of success,
2112 to interpret the address correctly. It would also be nice
2113 to generate a complaint, but that would require us to maintain
2114 a list of legitimate cases where a non-address form is allowed,
2115 as well as update callers to pass in at least the CU's DWARF
2116 version. This is more overhead than what we're willing to
2117 expand for a pretty rare case. */
2118 addr
= DW_UNSND (attr
);
2121 addr
= DW_ADDR (attr
);
2126 /* See declaration. */
2128 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2129 const dwarf2_debug_sections
*names
,
2131 : objfile (objfile_
),
2132 can_copy (can_copy_
)
2135 names
= &dwarf2_elf_names
;
2137 bfd
*obfd
= objfile
->obfd
;
2139 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2140 locate_sections (obfd
, sec
, *names
);
2143 dwarf2_per_objfile::~dwarf2_per_objfile ()
2145 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2146 free_cached_comp_units ();
2148 if (quick_file_names_table
)
2149 htab_delete (quick_file_names_table
);
2151 if (line_header_hash
)
2152 htab_delete (line_header_hash
);
2154 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2155 VEC_free (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
);
2157 for (signatured_type
*sig_type
: all_type_units
)
2158 VEC_free (dwarf2_per_cu_ptr
, sig_type
->per_cu
.imported_symtabs
);
2160 /* Everything else should be on the objfile obstack. */
2163 /* See declaration. */
2166 dwarf2_per_objfile::free_cached_comp_units ()
2168 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2169 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2170 while (per_cu
!= NULL
)
2172 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2175 *last_chain
= next_cu
;
2180 /* A helper class that calls free_cached_comp_units on
2183 class free_cached_comp_units
2187 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2188 : m_per_objfile (per_objfile
)
2192 ~free_cached_comp_units ()
2194 m_per_objfile
->free_cached_comp_units ();
2197 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2201 dwarf2_per_objfile
*m_per_objfile
;
2204 /* Try to locate the sections we need for DWARF 2 debugging
2205 information and return true if we have enough to do something.
2206 NAMES points to the dwarf2 section names, or is NULL if the standard
2207 ELF names are used. CAN_COPY is true for formats where symbol
2208 interposition is possible and so symbol values must follow copy
2209 relocation rules. */
2212 dwarf2_has_info (struct objfile
*objfile
,
2213 const struct dwarf2_debug_sections
*names
,
2216 if (objfile
->flags
& OBJF_READNEVER
)
2219 struct dwarf2_per_objfile
*dwarf2_per_objfile
2220 = get_dwarf2_per_objfile (objfile
);
2222 if (dwarf2_per_objfile
== NULL
)
2223 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
2227 return (!dwarf2_per_objfile
->info
.is_virtual
2228 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2229 && !dwarf2_per_objfile
->abbrev
.is_virtual
2230 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2233 /* Return the containing section of virtual section SECTION. */
2235 static struct dwarf2_section_info
*
2236 get_containing_section (const struct dwarf2_section_info
*section
)
2238 gdb_assert (section
->is_virtual
);
2239 return section
->s
.containing_section
;
2242 /* Return the bfd owner of SECTION. */
2245 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2247 if (section
->is_virtual
)
2249 section
= get_containing_section (section
);
2250 gdb_assert (!section
->is_virtual
);
2252 return section
->s
.section
->owner
;
2255 /* Return the bfd section of SECTION.
2256 Returns NULL if the section is not present. */
2259 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2261 if (section
->is_virtual
)
2263 section
= get_containing_section (section
);
2264 gdb_assert (!section
->is_virtual
);
2266 return section
->s
.section
;
2269 /* Return the name of SECTION. */
2272 get_section_name (const struct dwarf2_section_info
*section
)
2274 asection
*sectp
= get_section_bfd_section (section
);
2276 gdb_assert (sectp
!= NULL
);
2277 return bfd_section_name (sectp
);
2280 /* Return the name of the file SECTION is in. */
2283 get_section_file_name (const struct dwarf2_section_info
*section
)
2285 bfd
*abfd
= get_section_bfd_owner (section
);
2287 return bfd_get_filename (abfd
);
2290 /* Return the id of SECTION.
2291 Returns 0 if SECTION doesn't exist. */
2294 get_section_id (const struct dwarf2_section_info
*section
)
2296 asection
*sectp
= get_section_bfd_section (section
);
2303 /* Return the flags of SECTION.
2304 SECTION (or containing section if this is a virtual section) must exist. */
2307 get_section_flags (const struct dwarf2_section_info
*section
)
2309 asection
*sectp
= get_section_bfd_section (section
);
2311 gdb_assert (sectp
!= NULL
);
2312 return bfd_section_flags (sectp
);
2315 /* When loading sections, we look either for uncompressed section or for
2316 compressed section names. */
2319 section_is_p (const char *section_name
,
2320 const struct dwarf2_section_names
*names
)
2322 if (names
->normal
!= NULL
2323 && strcmp (section_name
, names
->normal
) == 0)
2325 if (names
->compressed
!= NULL
2326 && strcmp (section_name
, names
->compressed
) == 0)
2331 /* See declaration. */
2334 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2335 const dwarf2_debug_sections
&names
)
2337 flagword aflag
= bfd_section_flags (sectp
);
2339 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2342 else if (section_is_p (sectp
->name
, &names
.info
))
2344 this->info
.s
.section
= sectp
;
2345 this->info
.size
= bfd_section_size (sectp
);
2347 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2349 this->abbrev
.s
.section
= sectp
;
2350 this->abbrev
.size
= bfd_section_size (sectp
);
2352 else if (section_is_p (sectp
->name
, &names
.line
))
2354 this->line
.s
.section
= sectp
;
2355 this->line
.size
= bfd_section_size (sectp
);
2357 else if (section_is_p (sectp
->name
, &names
.loc
))
2359 this->loc
.s
.section
= sectp
;
2360 this->loc
.size
= bfd_section_size (sectp
);
2362 else if (section_is_p (sectp
->name
, &names
.loclists
))
2364 this->loclists
.s
.section
= sectp
;
2365 this->loclists
.size
= bfd_section_size (sectp
);
2367 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2369 this->macinfo
.s
.section
= sectp
;
2370 this->macinfo
.size
= bfd_section_size (sectp
);
2372 else if (section_is_p (sectp
->name
, &names
.macro
))
2374 this->macro
.s
.section
= sectp
;
2375 this->macro
.size
= bfd_section_size (sectp
);
2377 else if (section_is_p (sectp
->name
, &names
.str
))
2379 this->str
.s
.section
= sectp
;
2380 this->str
.size
= bfd_section_size (sectp
);
2382 else if (section_is_p (sectp
->name
, &names
.line_str
))
2384 this->line_str
.s
.section
= sectp
;
2385 this->line_str
.size
= bfd_section_size (sectp
);
2387 else if (section_is_p (sectp
->name
, &names
.addr
))
2389 this->addr
.s
.section
= sectp
;
2390 this->addr
.size
= bfd_section_size (sectp
);
2392 else if (section_is_p (sectp
->name
, &names
.frame
))
2394 this->frame
.s
.section
= sectp
;
2395 this->frame
.size
= bfd_section_size (sectp
);
2397 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2399 this->eh_frame
.s
.section
= sectp
;
2400 this->eh_frame
.size
= bfd_section_size (sectp
);
2402 else if (section_is_p (sectp
->name
, &names
.ranges
))
2404 this->ranges
.s
.section
= sectp
;
2405 this->ranges
.size
= bfd_section_size (sectp
);
2407 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2409 this->rnglists
.s
.section
= sectp
;
2410 this->rnglists
.size
= bfd_section_size (sectp
);
2412 else if (section_is_p (sectp
->name
, &names
.types
))
2414 struct dwarf2_section_info type_section
;
2416 memset (&type_section
, 0, sizeof (type_section
));
2417 type_section
.s
.section
= sectp
;
2418 type_section
.size
= bfd_section_size (sectp
);
2420 this->types
.push_back (type_section
);
2422 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2424 this->gdb_index
.s
.section
= sectp
;
2425 this->gdb_index
.size
= bfd_section_size (sectp
);
2427 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2429 this->debug_names
.s
.section
= sectp
;
2430 this->debug_names
.size
= bfd_section_size (sectp
);
2432 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2434 this->debug_aranges
.s
.section
= sectp
;
2435 this->debug_aranges
.size
= bfd_section_size (sectp
);
2438 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2439 && bfd_section_vma (sectp
) == 0)
2440 this->has_section_at_zero
= true;
2443 /* A helper function that decides whether a section is empty,
2447 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2449 if (section
->is_virtual
)
2450 return section
->size
== 0;
2451 return section
->s
.section
== NULL
|| section
->size
== 0;
2454 /* See dwarf2read.h. */
2457 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2461 gdb_byte
*buf
, *retbuf
;
2465 info
->buffer
= NULL
;
2466 info
->readin
= true;
2468 if (dwarf2_section_empty_p (info
))
2471 sectp
= get_section_bfd_section (info
);
2473 /* If this is a virtual section we need to read in the real one first. */
2474 if (info
->is_virtual
)
2476 struct dwarf2_section_info
*containing_section
=
2477 get_containing_section (info
);
2479 gdb_assert (sectp
!= NULL
);
2480 if ((sectp
->flags
& SEC_RELOC
) != 0)
2482 error (_("Dwarf Error: DWP format V2 with relocations is not"
2483 " supported in section %s [in module %s]"),
2484 get_section_name (info
), get_section_file_name (info
));
2486 dwarf2_read_section (objfile
, containing_section
);
2487 /* Other code should have already caught virtual sections that don't
2489 gdb_assert (info
->virtual_offset
+ info
->size
2490 <= containing_section
->size
);
2491 /* If the real section is empty or there was a problem reading the
2492 section we shouldn't get here. */
2493 gdb_assert (containing_section
->buffer
!= NULL
);
2494 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2498 /* If the section has relocations, we must read it ourselves.
2499 Otherwise we attach it to the BFD. */
2500 if ((sectp
->flags
& SEC_RELOC
) == 0)
2502 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2506 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2509 /* When debugging .o files, we may need to apply relocations; see
2510 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2511 We never compress sections in .o files, so we only need to
2512 try this when the section is not compressed. */
2513 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2516 info
->buffer
= retbuf
;
2520 abfd
= get_section_bfd_owner (info
);
2521 gdb_assert (abfd
!= NULL
);
2523 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2524 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2526 error (_("Dwarf Error: Can't read DWARF data"
2527 " in section %s [in module %s]"),
2528 bfd_section_name (sectp
), bfd_get_filename (abfd
));
2532 /* A helper function that returns the size of a section in a safe way.
2533 If you are positive that the section has been read before using the
2534 size, then it is safe to refer to the dwarf2_section_info object's
2535 "size" field directly. In other cases, you must call this
2536 function, because for compressed sections the size field is not set
2537 correctly until the section has been read. */
2539 static bfd_size_type
2540 dwarf2_section_size (struct objfile
*objfile
,
2541 struct dwarf2_section_info
*info
)
2544 dwarf2_read_section (objfile
, info
);
2548 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2552 dwarf2_get_section_info (struct objfile
*objfile
,
2553 enum dwarf2_section_enum sect
,
2554 asection
**sectp
, const gdb_byte
**bufp
,
2555 bfd_size_type
*sizep
)
2557 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
2558 struct dwarf2_section_info
*info
;
2560 /* We may see an objfile without any DWARF, in which case we just
2571 case DWARF2_DEBUG_FRAME
:
2572 info
= &data
->frame
;
2574 case DWARF2_EH_FRAME
:
2575 info
= &data
->eh_frame
;
2578 gdb_assert_not_reached ("unexpected section");
2581 dwarf2_read_section (objfile
, info
);
2583 *sectp
= get_section_bfd_section (info
);
2584 *bufp
= info
->buffer
;
2585 *sizep
= info
->size
;
2588 /* A helper function to find the sections for a .dwz file. */
2591 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2593 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2595 /* Note that we only support the standard ELF names, because .dwz
2596 is ELF-only (at the time of writing). */
2597 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2599 dwz_file
->abbrev
.s
.section
= sectp
;
2600 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2602 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2604 dwz_file
->info
.s
.section
= sectp
;
2605 dwz_file
->info
.size
= bfd_section_size (sectp
);
2607 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2609 dwz_file
->str
.s
.section
= sectp
;
2610 dwz_file
->str
.size
= bfd_section_size (sectp
);
2612 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2614 dwz_file
->line
.s
.section
= sectp
;
2615 dwz_file
->line
.size
= bfd_section_size (sectp
);
2617 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2619 dwz_file
->macro
.s
.section
= sectp
;
2620 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2622 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2624 dwz_file
->gdb_index
.s
.section
= sectp
;
2625 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2627 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2629 dwz_file
->debug_names
.s
.section
= sectp
;
2630 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2634 /* See dwarf2read.h. */
2637 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2639 const char *filename
;
2640 bfd_size_type buildid_len_arg
;
2644 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2645 return dwarf2_per_objfile
->dwz_file
.get ();
2647 bfd_set_error (bfd_error_no_error
);
2648 gdb::unique_xmalloc_ptr
<char> data
2649 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2650 &buildid_len_arg
, &buildid
));
2653 if (bfd_get_error () == bfd_error_no_error
)
2655 error (_("could not read '.gnu_debugaltlink' section: %s"),
2656 bfd_errmsg (bfd_get_error ()));
2659 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2661 buildid_len
= (size_t) buildid_len_arg
;
2663 filename
= data
.get ();
2665 std::string abs_storage
;
2666 if (!IS_ABSOLUTE_PATH (filename
))
2668 gdb::unique_xmalloc_ptr
<char> abs
2669 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2671 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2672 filename
= abs_storage
.c_str ();
2675 /* First try the file name given in the section. If that doesn't
2676 work, try to use the build-id instead. */
2677 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2678 if (dwz_bfd
!= NULL
)
2680 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2681 dwz_bfd
.reset (nullptr);
2684 if (dwz_bfd
== NULL
)
2685 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2687 if (dwz_bfd
== NULL
)
2688 error (_("could not find '.gnu_debugaltlink' file for %s"),
2689 objfile_name (dwarf2_per_objfile
->objfile
));
2691 std::unique_ptr
<struct dwz_file
> result
2692 (new struct dwz_file (std::move (dwz_bfd
)));
2694 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2697 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2698 result
->dwz_bfd
.get ());
2699 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2700 return dwarf2_per_objfile
->dwz_file
.get ();
2703 /* DWARF quick_symbols_functions support. */
2705 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2706 unique line tables, so we maintain a separate table of all .debug_line
2707 derived entries to support the sharing.
2708 All the quick functions need is the list of file names. We discard the
2709 line_header when we're done and don't need to record it here. */
2710 struct quick_file_names
2712 /* The data used to construct the hash key. */
2713 struct stmt_list_hash hash
;
2715 /* The number of entries in file_names, real_names. */
2716 unsigned int num_file_names
;
2718 /* The file names from the line table, after being run through
2720 const char **file_names
;
2722 /* The file names from the line table after being run through
2723 gdb_realpath. These are computed lazily. */
2724 const char **real_names
;
2727 /* When using the index (and thus not using psymtabs), each CU has an
2728 object of this type. This is used to hold information needed by
2729 the various "quick" methods. */
2730 struct dwarf2_per_cu_quick_data
2732 /* The file table. This can be NULL if there was no file table
2733 or it's currently not read in.
2734 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2735 struct quick_file_names
*file_names
;
2737 /* The corresponding symbol table. This is NULL if symbols for this
2738 CU have not yet been read. */
2739 struct compunit_symtab
*compunit_symtab
;
2741 /* A temporary mark bit used when iterating over all CUs in
2742 expand_symtabs_matching. */
2743 unsigned int mark
: 1;
2745 /* True if we've tried to read the file table and found there isn't one.
2746 There will be no point in trying to read it again next time. */
2747 unsigned int no_file_data
: 1;
2750 /* Utility hash function for a stmt_list_hash. */
2753 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2757 if (stmt_list_hash
->dwo_unit
!= NULL
)
2758 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2759 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2763 /* Utility equality function for a stmt_list_hash. */
2766 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2767 const struct stmt_list_hash
*rhs
)
2769 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2771 if (lhs
->dwo_unit
!= NULL
2772 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2775 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2778 /* Hash function for a quick_file_names. */
2781 hash_file_name_entry (const void *e
)
2783 const struct quick_file_names
*file_data
2784 = (const struct quick_file_names
*) e
;
2786 return hash_stmt_list_entry (&file_data
->hash
);
2789 /* Equality function for a quick_file_names. */
2792 eq_file_name_entry (const void *a
, const void *b
)
2794 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2795 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2797 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2800 /* Delete function for a quick_file_names. */
2803 delete_file_name_entry (void *e
)
2805 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2808 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2810 xfree ((void*) file_data
->file_names
[i
]);
2811 if (file_data
->real_names
)
2812 xfree ((void*) file_data
->real_names
[i
]);
2815 /* The space for the struct itself lives on objfile_obstack,
2816 so we don't free it here. */
2819 /* Create a quick_file_names hash table. */
2822 create_quick_file_names_table (unsigned int nr_initial_entries
)
2824 return htab_create_alloc (nr_initial_entries
,
2825 hash_file_name_entry
, eq_file_name_entry
,
2826 delete_file_name_entry
, xcalloc
, xfree
);
2829 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2830 have to be created afterwards. You should call age_cached_comp_units after
2831 processing PER_CU->CU. dw2_setup must have been already called. */
2834 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2836 if (per_cu
->is_debug_types
)
2837 load_full_type_unit (per_cu
);
2839 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2841 if (per_cu
->cu
== NULL
)
2842 return; /* Dummy CU. */
2844 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2847 /* Read in the symbols for PER_CU. */
2850 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2852 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2854 /* Skip type_unit_groups, reading the type units they contain
2855 is handled elsewhere. */
2856 if (IS_TYPE_UNIT_GROUP (per_cu
))
2859 /* The destructor of dwarf2_queue_guard frees any entries left on
2860 the queue. After this point we're guaranteed to leave this function
2861 with the dwarf queue empty. */
2862 dwarf2_queue_guard q_guard
;
2864 if (dwarf2_per_objfile
->using_index
2865 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2866 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2868 queue_comp_unit (per_cu
, language_minimal
);
2869 load_cu (per_cu
, skip_partial
);
2871 /* If we just loaded a CU from a DWO, and we're working with an index
2872 that may badly handle TUs, load all the TUs in that DWO as well.
2873 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2874 if (!per_cu
->is_debug_types
2875 && per_cu
->cu
!= NULL
2876 && per_cu
->cu
->dwo_unit
!= NULL
2877 && dwarf2_per_objfile
->index_table
!= NULL
2878 && dwarf2_per_objfile
->index_table
->version
<= 7
2879 /* DWP files aren't supported yet. */
2880 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2881 queue_and_load_all_dwo_tus (per_cu
);
2884 process_queue (dwarf2_per_objfile
);
2886 /* Age the cache, releasing compilation units that have not
2887 been used recently. */
2888 age_cached_comp_units (dwarf2_per_objfile
);
2891 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2892 the objfile from which this CU came. Returns the resulting symbol
2895 static struct compunit_symtab
*
2896 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2898 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2900 gdb_assert (dwarf2_per_objfile
->using_index
);
2901 if (!per_cu
->v
.quick
->compunit_symtab
)
2903 free_cached_comp_units
freer (dwarf2_per_objfile
);
2904 scoped_restore decrementer
= increment_reading_symtab ();
2905 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2906 process_cu_includes (dwarf2_per_objfile
);
2909 return per_cu
->v
.quick
->compunit_symtab
;
2912 /* See declaration. */
2914 dwarf2_per_cu_data
*
2915 dwarf2_per_objfile::get_cutu (int index
)
2917 if (index
>= this->all_comp_units
.size ())
2919 index
-= this->all_comp_units
.size ();
2920 gdb_assert (index
< this->all_type_units
.size ());
2921 return &this->all_type_units
[index
]->per_cu
;
2924 return this->all_comp_units
[index
];
2927 /* See declaration. */
2929 dwarf2_per_cu_data
*
2930 dwarf2_per_objfile::get_cu (int index
)
2932 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2934 return this->all_comp_units
[index
];
2937 /* See declaration. */
2940 dwarf2_per_objfile::get_tu (int index
)
2942 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2944 return this->all_type_units
[index
];
2947 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2948 objfile_obstack, and constructed with the specified field
2951 static dwarf2_per_cu_data
*
2952 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2953 struct dwarf2_section_info
*section
,
2955 sect_offset sect_off
, ULONGEST length
)
2957 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2958 dwarf2_per_cu_data
*the_cu
2959 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2960 struct dwarf2_per_cu_data
);
2961 the_cu
->sect_off
= sect_off
;
2962 the_cu
->length
= length
;
2963 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2964 the_cu
->section
= section
;
2965 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2966 struct dwarf2_per_cu_quick_data
);
2967 the_cu
->is_dwz
= is_dwz
;
2971 /* A helper for create_cus_from_index that handles a given list of
2975 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2976 const gdb_byte
*cu_list
, offset_type n_elements
,
2977 struct dwarf2_section_info
*section
,
2980 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2982 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2984 sect_offset sect_off
2985 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2986 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2989 dwarf2_per_cu_data
*per_cu
2990 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2992 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
2996 /* Read the CU list from the mapped index, and use it to create all
2997 the CU objects for this objfile. */
3000 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3001 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3002 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3004 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
3005 dwarf2_per_objfile
->all_comp_units
.reserve
3006 ((cu_list_elements
+ dwz_elements
) / 2);
3008 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3009 &dwarf2_per_objfile
->info
, 0);
3011 if (dwz_elements
== 0)
3014 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3015 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
3019 /* Create the signatured type hash table from the index. */
3022 create_signatured_type_table_from_index
3023 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3024 struct dwarf2_section_info
*section
,
3025 const gdb_byte
*bytes
,
3026 offset_type elements
)
3028 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3030 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3031 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
3033 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3035 for (offset_type i
= 0; i
< elements
; i
+= 3)
3037 struct signatured_type
*sig_type
;
3040 cu_offset type_offset_in_tu
;
3042 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3043 sect_offset sect_off
3044 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3046 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3048 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3051 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3052 struct signatured_type
);
3053 sig_type
->signature
= signature
;
3054 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3055 sig_type
->per_cu
.is_debug_types
= 1;
3056 sig_type
->per_cu
.section
= section
;
3057 sig_type
->per_cu
.sect_off
= sect_off
;
3058 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3059 sig_type
->per_cu
.v
.quick
3060 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3061 struct dwarf2_per_cu_quick_data
);
3063 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3066 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3069 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3072 /* Create the signatured type hash table from .debug_names. */
3075 create_signatured_type_table_from_debug_names
3076 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3077 const mapped_debug_names
&map
,
3078 struct dwarf2_section_info
*section
,
3079 struct dwarf2_section_info
*abbrev_section
)
3081 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3083 dwarf2_read_section (objfile
, section
);
3084 dwarf2_read_section (objfile
, abbrev_section
);
3086 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3087 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
3089 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3091 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3093 struct signatured_type
*sig_type
;
3096 sect_offset sect_off
3097 = (sect_offset
) (extract_unsigned_integer
3098 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3100 map
.dwarf5_byte_order
));
3102 comp_unit_head cu_header
;
3103 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3105 section
->buffer
+ to_underlying (sect_off
),
3108 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3109 struct signatured_type
);
3110 sig_type
->signature
= cu_header
.signature
;
3111 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3112 sig_type
->per_cu
.is_debug_types
= 1;
3113 sig_type
->per_cu
.section
= section
;
3114 sig_type
->per_cu
.sect_off
= sect_off
;
3115 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3116 sig_type
->per_cu
.v
.quick
3117 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3118 struct dwarf2_per_cu_quick_data
);
3120 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3123 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3126 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3129 /* Read the address map data from the mapped index, and use it to
3130 populate the objfile's psymtabs_addrmap. */
3133 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3134 struct mapped_index
*index
)
3136 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3137 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3138 const gdb_byte
*iter
, *end
;
3139 struct addrmap
*mutable_map
;
3142 auto_obstack temp_obstack
;
3144 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3146 iter
= index
->address_table
.data ();
3147 end
= iter
+ index
->address_table
.size ();
3149 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3153 ULONGEST hi
, lo
, cu_index
;
3154 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3156 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3158 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3163 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
3164 hex_string (lo
), hex_string (hi
));
3168 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
3170 complaint (_(".gdb_index address table has invalid CU number %u"),
3171 (unsigned) cu_index
);
3175 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
3176 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
3177 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3178 dwarf2_per_objfile
->get_cu (cu_index
));
3181 objfile
->partial_symtabs
->psymtabs_addrmap
3182 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3185 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3186 populate the objfile's psymtabs_addrmap. */
3189 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3190 struct dwarf2_section_info
*section
)
3192 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3193 bfd
*abfd
= objfile
->obfd
;
3194 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3195 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3196 SECT_OFF_TEXT (objfile
));
3198 auto_obstack temp_obstack
;
3199 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3201 std::unordered_map
<sect_offset
,
3202 dwarf2_per_cu_data
*,
3203 gdb::hash_enum
<sect_offset
>>
3204 debug_info_offset_to_per_cu
;
3205 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3207 const auto insertpair
3208 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3209 if (!insertpair
.second
)
3211 warning (_("Section .debug_aranges in %s has duplicate "
3212 "debug_info_offset %s, ignoring .debug_aranges."),
3213 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3218 dwarf2_read_section (objfile
, section
);
3220 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3222 const gdb_byte
*addr
= section
->buffer
;
3224 while (addr
< section
->buffer
+ section
->size
)
3226 const gdb_byte
*const entry_addr
= addr
;
3227 unsigned int bytes_read
;
3229 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3233 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3234 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3235 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3236 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3238 warning (_("Section .debug_aranges in %s entry at offset %s "
3239 "length %s exceeds section length %s, "
3240 "ignoring .debug_aranges."),
3241 objfile_name (objfile
),
3242 plongest (entry_addr
- section
->buffer
),
3243 plongest (bytes_read
+ entry_length
),
3244 pulongest (section
->size
));
3248 /* The version number. */
3249 const uint16_t version
= read_2_bytes (abfd
, addr
);
3253 warning (_("Section .debug_aranges in %s entry at offset %s "
3254 "has unsupported version %d, ignoring .debug_aranges."),
3255 objfile_name (objfile
),
3256 plongest (entry_addr
- section
->buffer
), version
);
3260 const uint64_t debug_info_offset
3261 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3262 addr
+= offset_size
;
3263 const auto per_cu_it
3264 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3265 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3267 warning (_("Section .debug_aranges in %s entry at offset %s "
3268 "debug_info_offset %s does not exists, "
3269 "ignoring .debug_aranges."),
3270 objfile_name (objfile
),
3271 plongest (entry_addr
- section
->buffer
),
3272 pulongest (debug_info_offset
));
3275 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3277 const uint8_t address_size
= *addr
++;
3278 if (address_size
< 1 || address_size
> 8)
3280 warning (_("Section .debug_aranges in %s entry at offset %s "
3281 "address_size %u is invalid, ignoring .debug_aranges."),
3282 objfile_name (objfile
),
3283 plongest (entry_addr
- section
->buffer
), address_size
);
3287 const uint8_t segment_selector_size
= *addr
++;
3288 if (segment_selector_size
!= 0)
3290 warning (_("Section .debug_aranges in %s entry at offset %s "
3291 "segment_selector_size %u is not supported, "
3292 "ignoring .debug_aranges."),
3293 objfile_name (objfile
),
3294 plongest (entry_addr
- section
->buffer
),
3295 segment_selector_size
);
3299 /* Must pad to an alignment boundary that is twice the address
3300 size. It is undocumented by the DWARF standard but GCC does
3302 for (size_t padding
= ((-(addr
- section
->buffer
))
3303 & (2 * address_size
- 1));
3304 padding
> 0; padding
--)
3307 warning (_("Section .debug_aranges in %s entry at offset %s "
3308 "padding is not zero, ignoring .debug_aranges."),
3309 objfile_name (objfile
),
3310 plongest (entry_addr
- section
->buffer
));
3316 if (addr
+ 2 * address_size
> entry_end
)
3318 warning (_("Section .debug_aranges in %s entry at offset %s "
3319 "address list is not properly terminated, "
3320 "ignoring .debug_aranges."),
3321 objfile_name (objfile
),
3322 plongest (entry_addr
- section
->buffer
));
3325 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3327 addr
+= address_size
;
3328 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3330 addr
+= address_size
;
3331 if (start
== 0 && length
== 0)
3333 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3335 /* Symbol was eliminated due to a COMDAT group. */
3338 ULONGEST end
= start
+ length
;
3339 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
3341 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
3343 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3347 objfile
->partial_symtabs
->psymtabs_addrmap
3348 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3351 /* Find a slot in the mapped index INDEX for the object named NAME.
3352 If NAME is found, set *VEC_OUT to point to the CU vector in the
3353 constant pool and return true. If NAME cannot be found, return
3357 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3358 offset_type
**vec_out
)
3361 offset_type slot
, step
;
3362 int (*cmp
) (const char *, const char *);
3364 gdb::unique_xmalloc_ptr
<char> without_params
;
3365 if (current_language
->la_language
== language_cplus
3366 || current_language
->la_language
== language_fortran
3367 || current_language
->la_language
== language_d
)
3369 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3372 if (strchr (name
, '(') != NULL
)
3374 without_params
= cp_remove_params (name
);
3376 if (without_params
!= NULL
)
3377 name
= without_params
.get ();
3381 /* Index version 4 did not support case insensitive searches. But the
3382 indices for case insensitive languages are built in lowercase, therefore
3383 simulate our NAME being searched is also lowercased. */
3384 hash
= mapped_index_string_hash ((index
->version
== 4
3385 && case_sensitivity
== case_sensitive_off
3386 ? 5 : index
->version
),
3389 slot
= hash
& (index
->symbol_table
.size () - 1);
3390 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3391 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3397 const auto &bucket
= index
->symbol_table
[slot
];
3398 if (bucket
.name
== 0 && bucket
.vec
== 0)
3401 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3402 if (!cmp (name
, str
))
3404 *vec_out
= (offset_type
*) (index
->constant_pool
3405 + MAYBE_SWAP (bucket
.vec
));
3409 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3413 /* A helper function that reads the .gdb_index from BUFFER and fills
3414 in MAP. FILENAME is the name of the file containing the data;
3415 it is used for error reporting. DEPRECATED_OK is true if it is
3416 ok to use deprecated sections.
3418 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3419 out parameters that are filled in with information about the CU and
3420 TU lists in the section.
3422 Returns true if all went well, false otherwise. */
3425 read_gdb_index_from_buffer (struct objfile
*objfile
,
3426 const char *filename
,
3428 gdb::array_view
<const gdb_byte
> buffer
,
3429 struct mapped_index
*map
,
3430 const gdb_byte
**cu_list
,
3431 offset_type
*cu_list_elements
,
3432 const gdb_byte
**types_list
,
3433 offset_type
*types_list_elements
)
3435 const gdb_byte
*addr
= &buffer
[0];
3437 /* Version check. */
3438 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
3439 /* Versions earlier than 3 emitted every copy of a psymbol. This
3440 causes the index to behave very poorly for certain requests. Version 3
3441 contained incomplete addrmap. So, it seems better to just ignore such
3445 static int warning_printed
= 0;
3446 if (!warning_printed
)
3448 warning (_("Skipping obsolete .gdb_index section in %s."),
3450 warning_printed
= 1;
3454 /* Index version 4 uses a different hash function than index version
3457 Versions earlier than 6 did not emit psymbols for inlined
3458 functions. Using these files will cause GDB not to be able to
3459 set breakpoints on inlined functions by name, so we ignore these
3460 indices unless the user has done
3461 "set use-deprecated-index-sections on". */
3462 if (version
< 6 && !deprecated_ok
)
3464 static int warning_printed
= 0;
3465 if (!warning_printed
)
3468 Skipping deprecated .gdb_index section in %s.\n\
3469 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3470 to use the section anyway."),
3472 warning_printed
= 1;
3476 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3477 of the TU (for symbols coming from TUs),
3478 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3479 Plus gold-generated indices can have duplicate entries for global symbols,
3480 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3481 These are just performance bugs, and we can't distinguish gdb-generated
3482 indices from gold-generated ones, so issue no warning here. */
3484 /* Indexes with higher version than the one supported by GDB may be no
3485 longer backward compatible. */
3489 map
->version
= version
;
3491 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3494 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3495 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3499 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3500 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3501 - MAYBE_SWAP (metadata
[i
]))
3505 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3506 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3508 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3511 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3512 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3514 = gdb::array_view
<mapped_index::symbol_table_slot
>
3515 ((mapped_index::symbol_table_slot
*) symbol_table
,
3516 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3519 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3524 /* Callback types for dwarf2_read_gdb_index. */
3526 typedef gdb::function_view
3527 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
3528 get_gdb_index_contents_ftype
;
3529 typedef gdb::function_view
3530 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3531 get_gdb_index_contents_dwz_ftype
;
3533 /* Read .gdb_index. If everything went ok, initialize the "quick"
3534 elements of all the CUs and return 1. Otherwise, return 0. */
3537 dwarf2_read_gdb_index
3538 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3539 get_gdb_index_contents_ftype get_gdb_index_contents
,
3540 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3542 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3543 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3544 struct dwz_file
*dwz
;
3545 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3547 gdb::array_view
<const gdb_byte
> main_index_contents
3548 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3550 if (main_index_contents
.empty ())
3553 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3554 if (!read_gdb_index_from_buffer (objfile
, objfile_name (objfile
),
3555 use_deprecated_index_sections
,
3556 main_index_contents
, map
.get (), &cu_list
,
3557 &cu_list_elements
, &types_list
,
3558 &types_list_elements
))
3561 /* Don't use the index if it's empty. */
3562 if (map
->symbol_table
.empty ())
3565 /* If there is a .dwz file, read it so we can get its CU list as
3567 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3570 struct mapped_index dwz_map
;
3571 const gdb_byte
*dwz_types_ignore
;
3572 offset_type dwz_types_elements_ignore
;
3574 gdb::array_view
<const gdb_byte
> dwz_index_content
3575 = get_gdb_index_contents_dwz (objfile
, dwz
);
3577 if (dwz_index_content
.empty ())
3580 if (!read_gdb_index_from_buffer (objfile
,
3581 bfd_get_filename (dwz
->dwz_bfd
.get ()),
3582 1, dwz_index_content
, &dwz_map
,
3583 &dwz_list
, &dwz_list_elements
,
3585 &dwz_types_elements_ignore
))
3587 warning (_("could not read '.gdb_index' section from %s; skipping"),
3588 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3593 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3594 dwz_list
, dwz_list_elements
);
3596 if (types_list_elements
)
3598 /* We can only handle a single .debug_types when we have an
3600 if (dwarf2_per_objfile
->types
.size () != 1)
3603 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
3605 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3606 types_list
, types_list_elements
);
3609 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3611 dwarf2_per_objfile
->index_table
= std::move (map
);
3612 dwarf2_per_objfile
->using_index
= 1;
3613 dwarf2_per_objfile
->quick_file_names_table
=
3614 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3619 /* die_reader_func for dw2_get_file_names. */
3622 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3623 const gdb_byte
*info_ptr
,
3624 struct die_info
*comp_unit_die
,
3628 struct dwarf2_cu
*cu
= reader
->cu
;
3629 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3630 struct dwarf2_per_objfile
*dwarf2_per_objfile
3631 = cu
->per_cu
->dwarf2_per_objfile
;
3632 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3633 struct dwarf2_per_cu_data
*lh_cu
;
3634 struct attribute
*attr
;
3637 struct quick_file_names
*qfn
;
3639 gdb_assert (! this_cu
->is_debug_types
);
3641 /* Our callers never want to match partial units -- instead they
3642 will match the enclosing full CU. */
3643 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3645 this_cu
->v
.quick
->no_file_data
= 1;
3653 sect_offset line_offset
{};
3655 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3658 struct quick_file_names find_entry
;
3660 line_offset
= (sect_offset
) DW_UNSND (attr
);
3662 /* We may have already read in this line header (TU line header sharing).
3663 If we have we're done. */
3664 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3665 find_entry
.hash
.line_sect_off
= line_offset
;
3666 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3667 &find_entry
, INSERT
);
3670 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3674 lh
= dwarf_decode_line_header (line_offset
, cu
);
3678 lh_cu
->v
.quick
->no_file_data
= 1;
3682 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3683 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3684 qfn
->hash
.line_sect_off
= line_offset
;
3685 gdb_assert (slot
!= NULL
);
3688 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3691 if (strcmp (fnd
.name
, "<unknown>") != 0)
3694 qfn
->num_file_names
= offset
+ lh
->file_names
.size ();
3696 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, qfn
->num_file_names
);
3698 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3699 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3700 qfn
->file_names
[i
+ offset
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3701 qfn
->real_names
= NULL
;
3703 lh_cu
->v
.quick
->file_names
= qfn
;
3706 /* A helper for the "quick" functions which attempts to read the line
3707 table for THIS_CU. */
3709 static struct quick_file_names
*
3710 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3712 /* This should never be called for TUs. */
3713 gdb_assert (! this_cu
->is_debug_types
);
3714 /* Nor type unit groups. */
3715 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3717 if (this_cu
->v
.quick
->file_names
!= NULL
)
3718 return this_cu
->v
.quick
->file_names
;
3719 /* If we know there is no line data, no point in looking again. */
3720 if (this_cu
->v
.quick
->no_file_data
)
3723 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3725 if (this_cu
->v
.quick
->no_file_data
)
3727 return this_cu
->v
.quick
->file_names
;
3730 /* A helper for the "quick" functions which computes and caches the
3731 real path for a given file name from the line table. */
3734 dw2_get_real_path (struct objfile
*objfile
,
3735 struct quick_file_names
*qfn
, int index
)
3737 if (qfn
->real_names
== NULL
)
3738 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3739 qfn
->num_file_names
, const char *);
3741 if (qfn
->real_names
[index
] == NULL
)
3742 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3744 return qfn
->real_names
[index
];
3747 static struct symtab
*
3748 dw2_find_last_source_symtab (struct objfile
*objfile
)
3750 struct dwarf2_per_objfile
*dwarf2_per_objfile
3751 = get_dwarf2_per_objfile (objfile
);
3752 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3753 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3758 return compunit_primary_filetab (cust
);
3761 /* Traversal function for dw2_forget_cached_source_info. */
3764 dw2_free_cached_file_names (void **slot
, void *info
)
3766 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3768 if (file_data
->real_names
)
3772 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3774 xfree ((void*) file_data
->real_names
[i
]);
3775 file_data
->real_names
[i
] = NULL
;
3783 dw2_forget_cached_source_info (struct objfile
*objfile
)
3785 struct dwarf2_per_objfile
*dwarf2_per_objfile
3786 = get_dwarf2_per_objfile (objfile
);
3788 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3789 dw2_free_cached_file_names
, NULL
);
3792 /* Helper function for dw2_map_symtabs_matching_filename that expands
3793 the symtabs and calls the iterator. */
3796 dw2_map_expand_apply (struct objfile
*objfile
,
3797 struct dwarf2_per_cu_data
*per_cu
,
3798 const char *name
, const char *real_path
,
3799 gdb::function_view
<bool (symtab
*)> callback
)
3801 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3803 /* Don't visit already-expanded CUs. */
3804 if (per_cu
->v
.quick
->compunit_symtab
)
3807 /* This may expand more than one symtab, and we want to iterate over
3809 dw2_instantiate_symtab (per_cu
, false);
3811 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3812 last_made
, callback
);
3815 /* Implementation of the map_symtabs_matching_filename method. */
3818 dw2_map_symtabs_matching_filename
3819 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3820 gdb::function_view
<bool (symtab
*)> callback
)
3822 const char *name_basename
= lbasename (name
);
3823 struct dwarf2_per_objfile
*dwarf2_per_objfile
3824 = get_dwarf2_per_objfile (objfile
);
3826 /* The rule is CUs specify all the files, including those used by
3827 any TU, so there's no need to scan TUs here. */
3829 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3831 /* We only need to look at symtabs not already expanded. */
3832 if (per_cu
->v
.quick
->compunit_symtab
)
3835 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3836 if (file_data
== NULL
)
3839 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3841 const char *this_name
= file_data
->file_names
[j
];
3842 const char *this_real_name
;
3844 if (compare_filenames_for_search (this_name
, name
))
3846 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3852 /* Before we invoke realpath, which can get expensive when many
3853 files are involved, do a quick comparison of the basenames. */
3854 if (! basenames_may_differ
3855 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3858 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3859 if (compare_filenames_for_search (this_real_name
, name
))
3861 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3867 if (real_path
!= NULL
)
3869 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3870 gdb_assert (IS_ABSOLUTE_PATH (name
));
3871 if (this_real_name
!= NULL
3872 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3874 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3886 /* Struct used to manage iterating over all CUs looking for a symbol. */
3888 struct dw2_symtab_iterator
3890 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3891 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3892 /* If set, only look for symbols that match that block. Valid values are
3893 GLOBAL_BLOCK and STATIC_BLOCK. */
3894 gdb::optional
<block_enum
> block_index
;
3895 /* The kind of symbol we're looking for. */
3897 /* The list of CUs from the index entry of the symbol,
3898 or NULL if not found. */
3900 /* The next element in VEC to look at. */
3902 /* The number of elements in VEC, or zero if there is no match. */
3904 /* Have we seen a global version of the symbol?
3905 If so we can ignore all further global instances.
3906 This is to work around gold/15646, inefficient gold-generated
3911 /* Initialize the index symtab iterator ITER. */
3914 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3915 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3916 gdb::optional
<block_enum
> block_index
,
3920 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3921 iter
->block_index
= block_index
;
3922 iter
->domain
= domain
;
3924 iter
->global_seen
= 0;
3926 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3928 /* index is NULL if OBJF_READNOW. */
3929 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3930 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3938 /* Return the next matching CU or NULL if there are no more. */
3940 static struct dwarf2_per_cu_data
*
3941 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3943 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3945 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3947 offset_type cu_index_and_attrs
=
3948 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3949 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3950 gdb_index_symbol_kind symbol_kind
=
3951 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3952 /* Only check the symbol attributes if they're present.
3953 Indices prior to version 7 don't record them,
3954 and indices >= 7 may elide them for certain symbols
3955 (gold does this). */
3957 (dwarf2_per_objfile
->index_table
->version
>= 7
3958 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3960 /* Don't crash on bad data. */
3961 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3962 + dwarf2_per_objfile
->all_type_units
.size ()))
3964 complaint (_(".gdb_index entry has bad CU index"
3966 objfile_name (dwarf2_per_objfile
->objfile
));
3970 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3972 /* Skip if already read in. */
3973 if (per_cu
->v
.quick
->compunit_symtab
)
3976 /* Check static vs global. */
3979 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3981 if (iter
->block_index
.has_value ())
3983 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3985 if (is_static
!= want_static
)
3989 /* Work around gold/15646. */
3990 if (!is_static
&& iter
->global_seen
)
3993 iter
->global_seen
= 1;
3996 /* Only check the symbol's kind if it has one. */
3999 switch (iter
->domain
)
4002 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
4003 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
4004 /* Some types are also in VAR_DOMAIN. */
4005 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4009 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4013 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4028 static struct compunit_symtab
*
4029 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
4030 const char *name
, domain_enum domain
)
4032 struct compunit_symtab
*stab_best
= NULL
;
4033 struct dwarf2_per_objfile
*dwarf2_per_objfile
4034 = get_dwarf2_per_objfile (objfile
);
4036 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4038 struct dw2_symtab_iterator iter
;
4039 struct dwarf2_per_cu_data
*per_cu
;
4041 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
4043 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4045 struct symbol
*sym
, *with_opaque
= NULL
;
4046 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
4047 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4048 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4050 sym
= block_find_symbol (block
, name
, domain
,
4051 block_find_non_opaque_type_preferred
,
4054 /* Some caution must be observed with overloaded functions
4055 and methods, since the index will not contain any overload
4056 information (but NAME might contain it). */
4059 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4061 if (with_opaque
!= NULL
4062 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4065 /* Keep looking through other CUs. */
4072 dw2_print_stats (struct objfile
*objfile
)
4074 struct dwarf2_per_objfile
*dwarf2_per_objfile
4075 = get_dwarf2_per_objfile (objfile
);
4076 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
4077 + dwarf2_per_objfile
->all_type_units
.size ());
4080 for (int i
= 0; i
< total
; ++i
)
4082 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4084 if (!per_cu
->v
.quick
->compunit_symtab
)
4087 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4088 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4091 /* This dumps minimal information about the index.
4092 It is called via "mt print objfiles".
4093 One use is to verify .gdb_index has been loaded by the
4094 gdb.dwarf2/gdb-index.exp testcase. */
4097 dw2_dump (struct objfile
*objfile
)
4099 struct dwarf2_per_objfile
*dwarf2_per_objfile
4100 = get_dwarf2_per_objfile (objfile
);
4102 gdb_assert (dwarf2_per_objfile
->using_index
);
4103 printf_filtered (".gdb_index:");
4104 if (dwarf2_per_objfile
->index_table
!= NULL
)
4106 printf_filtered (" version %d\n",
4107 dwarf2_per_objfile
->index_table
->version
);
4110 printf_filtered (" faked for \"readnow\"\n");
4111 printf_filtered ("\n");
4115 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4116 const char *func_name
)
4118 struct dwarf2_per_objfile
*dwarf2_per_objfile
4119 = get_dwarf2_per_objfile (objfile
);
4121 struct dw2_symtab_iterator iter
;
4122 struct dwarf2_per_cu_data
*per_cu
;
4124 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
4126 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4127 dw2_instantiate_symtab (per_cu
, false);
4132 dw2_expand_all_symtabs (struct objfile
*objfile
)
4134 struct dwarf2_per_objfile
*dwarf2_per_objfile
4135 = get_dwarf2_per_objfile (objfile
);
4136 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
4137 + dwarf2_per_objfile
->all_type_units
.size ());
4139 for (int i
= 0; i
< total_units
; ++i
)
4141 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4143 /* We don't want to directly expand a partial CU, because if we
4144 read it with the wrong language, then assertion failures can
4145 be triggered later on. See PR symtab/23010. So, tell
4146 dw2_instantiate_symtab to skip partial CUs -- any important
4147 partial CU will be read via DW_TAG_imported_unit anyway. */
4148 dw2_instantiate_symtab (per_cu
, true);
4153 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4154 const char *fullname
)
4156 struct dwarf2_per_objfile
*dwarf2_per_objfile
4157 = get_dwarf2_per_objfile (objfile
);
4159 /* We don't need to consider type units here.
4160 This is only called for examining code, e.g. expand_line_sal.
4161 There can be an order of magnitude (or more) more type units
4162 than comp units, and we avoid them if we can. */
4164 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4166 /* We only need to look at symtabs not already expanded. */
4167 if (per_cu
->v
.quick
->compunit_symtab
)
4170 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4171 if (file_data
== NULL
)
4174 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4176 const char *this_fullname
= file_data
->file_names
[j
];
4178 if (filename_cmp (this_fullname
, fullname
) == 0)
4180 dw2_instantiate_symtab (per_cu
, false);
4188 dw2_map_matching_symbols
4189 (struct objfile
*objfile
,
4190 const lookup_name_info
&name
, domain_enum domain
,
4192 gdb::function_view
<symbol_found_callback_ftype
> callback
,
4193 symbol_compare_ftype
*ordered_compare
)
4195 /* Currently unimplemented; used for Ada. The function can be called if the
4196 current language is Ada for a non-Ada objfile using GNU index. As Ada
4197 does not look for non-Ada symbols this function should just return. */
4200 /* Starting from a search name, return the string that finds the upper
4201 bound of all strings that start with SEARCH_NAME in a sorted name
4202 list. Returns the empty string to indicate that the upper bound is
4203 the end of the list. */
4206 make_sort_after_prefix_name (const char *search_name
)
4208 /* When looking to complete "func", we find the upper bound of all
4209 symbols that start with "func" by looking for where we'd insert
4210 the closest string that would follow "func" in lexicographical
4211 order. Usually, that's "func"-with-last-character-incremented,
4212 i.e. "fund". Mind non-ASCII characters, though. Usually those
4213 will be UTF-8 multi-byte sequences, but we can't be certain.
4214 Especially mind the 0xff character, which is a valid character in
4215 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4216 rule out compilers allowing it in identifiers. Note that
4217 conveniently, strcmp/strcasecmp are specified to compare
4218 characters interpreted as unsigned char. So what we do is treat
4219 the whole string as a base 256 number composed of a sequence of
4220 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4221 to 0, and carries 1 to the following more-significant position.
4222 If the very first character in SEARCH_NAME ends up incremented
4223 and carries/overflows, then the upper bound is the end of the
4224 list. The string after the empty string is also the empty
4227 Some examples of this operation:
4229 SEARCH_NAME => "+1" RESULT
4233 "\xff" "a" "\xff" => "\xff" "b"
4238 Then, with these symbols for example:
4244 completing "func" looks for symbols between "func" and
4245 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4246 which finds "func" and "func1", but not "fund".
4250 funcÿ (Latin1 'ÿ' [0xff])
4254 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4255 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4259 ÿÿ (Latin1 'ÿ' [0xff])
4262 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4263 the end of the list.
4265 std::string after
= search_name
;
4266 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4268 if (!after
.empty ())
4269 after
.back () = (unsigned char) after
.back () + 1;
4273 /* See declaration. */
4275 std::pair
<std::vector
<name_component
>::const_iterator
,
4276 std::vector
<name_component
>::const_iterator
>
4277 mapped_index_base::find_name_components_bounds
4278 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
4281 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4283 const char *lang_name
4284 = lookup_name_without_params
.language_lookup_name (lang
).c_str ();
4286 /* Comparison function object for lower_bound that matches against a
4287 given symbol name. */
4288 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4291 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4292 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4293 return name_cmp (elem_name
, name
) < 0;
4296 /* Comparison function object for upper_bound that matches against a
4297 given symbol name. */
4298 auto lookup_compare_upper
= [&] (const char *name
,
4299 const name_component
&elem
)
4301 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4302 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4303 return name_cmp (name
, elem_name
) < 0;
4306 auto begin
= this->name_components
.begin ();
4307 auto end
= this->name_components
.end ();
4309 /* Find the lower bound. */
4312 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
4315 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
4318 /* Find the upper bound. */
4321 if (lookup_name_without_params
.completion_mode ())
4323 /* In completion mode, we want UPPER to point past all
4324 symbols names that have the same prefix. I.e., with
4325 these symbols, and completing "func":
4327 function << lower bound
4329 other_function << upper bound
4331 We find the upper bound by looking for the insertion
4332 point of "func"-with-last-character-incremented,
4334 std::string after
= make_sort_after_prefix_name (lang_name
);
4337 return std::lower_bound (lower
, end
, after
.c_str (),
4338 lookup_compare_lower
);
4341 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
4344 return {lower
, upper
};
4347 /* See declaration. */
4350 mapped_index_base::build_name_components ()
4352 if (!this->name_components
.empty ())
4355 this->name_components_casing
= case_sensitivity
;
4357 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4359 /* The code below only knows how to break apart components of C++
4360 symbol names (and other languages that use '::' as
4361 namespace/module separator) and Ada symbol names. */
4362 auto count
= this->symbol_name_count ();
4363 for (offset_type idx
= 0; idx
< count
; idx
++)
4365 if (this->symbol_name_slot_invalid (idx
))
4368 const char *name
= this->symbol_name_at (idx
);
4370 /* Add each name component to the name component table. */
4371 unsigned int previous_len
= 0;
4373 if (strstr (name
, "::") != nullptr)
4375 for (unsigned int current_len
= cp_find_first_component (name
);
4376 name
[current_len
] != '\0';
4377 current_len
+= cp_find_first_component (name
+ current_len
))
4379 gdb_assert (name
[current_len
] == ':');
4380 this->name_components
.push_back ({previous_len
, idx
});
4381 /* Skip the '::'. */
4383 previous_len
= current_len
;
4388 /* Handle the Ada encoded (aka mangled) form here. */
4389 for (const char *iter
= strstr (name
, "__");
4391 iter
= strstr (iter
, "__"))
4393 this->name_components
.push_back ({previous_len
, idx
});
4395 previous_len
= iter
- name
;
4399 this->name_components
.push_back ({previous_len
, idx
});
4402 /* Sort name_components elements by name. */
4403 auto name_comp_compare
= [&] (const name_component
&left
,
4404 const name_component
&right
)
4406 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4407 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4409 const char *left_name
= left_qualified
+ left
.name_offset
;
4410 const char *right_name
= right_qualified
+ right
.name_offset
;
4412 return name_cmp (left_name
, right_name
) < 0;
4415 std::sort (this->name_components
.begin (),
4416 this->name_components
.end (),
4420 /* Helper for dw2_expand_symtabs_matching that works with a
4421 mapped_index_base instead of the containing objfile. This is split
4422 to a separate function in order to be able to unit test the
4423 name_components matching using a mock mapped_index_base. For each
4424 symbol name that matches, calls MATCH_CALLBACK, passing it the
4425 symbol's index in the mapped_index_base symbol table. */
4428 dw2_expand_symtabs_matching_symbol
4429 (mapped_index_base
&index
,
4430 const lookup_name_info
&lookup_name_in
,
4431 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4432 enum search_domain kind
,
4433 gdb::function_view
<bool (offset_type
)> match_callback
)
4435 lookup_name_info lookup_name_without_params
4436 = lookup_name_in
.make_ignore_params ();
4438 /* Build the symbol name component sorted vector, if we haven't
4440 index
.build_name_components ();
4442 /* The same symbol may appear more than once in the range though.
4443 E.g., if we're looking for symbols that complete "w", and we have
4444 a symbol named "w1::w2", we'll find the two name components for
4445 that same symbol in the range. To be sure we only call the
4446 callback once per symbol, we first collect the symbol name
4447 indexes that matched in a temporary vector and ignore
4449 std::vector
<offset_type
> matches
;
4451 struct name_and_matcher
4453 symbol_name_matcher_ftype
*matcher
;
4454 const std::string
&name
;
4456 bool operator== (const name_and_matcher
&other
) const
4458 return matcher
== other
.matcher
&& name
== other
.name
;
4462 /* A vector holding all the different symbol name matchers, for all
4464 std::vector
<name_and_matcher
> matchers
;
4466 for (int i
= 0; i
< nr_languages
; i
++)
4468 enum language lang_e
= (enum language
) i
;
4470 const language_defn
*lang
= language_def (lang_e
);
4471 symbol_name_matcher_ftype
*name_matcher
4472 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
4474 name_and_matcher key
{
4476 lookup_name_without_params
.language_lookup_name (lang_e
)
4479 /* Don't insert the same comparison routine more than once.
4480 Note that we do this linear walk. This is not a problem in
4481 practice because the number of supported languages is
4483 if (std::find (matchers
.begin (), matchers
.end (), key
)
4486 matchers
.push_back (std::move (key
));
4489 = index
.find_name_components_bounds (lookup_name_without_params
,
4492 /* Now for each symbol name in range, check to see if we have a name
4493 match, and if so, call the MATCH_CALLBACK callback. */
4495 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4497 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4499 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
4500 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4503 matches
.push_back (bounds
.first
->idx
);
4507 std::sort (matches
.begin (), matches
.end ());
4509 /* Finally call the callback, once per match. */
4511 for (offset_type idx
: matches
)
4515 if (!match_callback (idx
))
4521 /* Above we use a type wider than idx's for 'prev', since 0 and
4522 (offset_type)-1 are both possible values. */
4523 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4528 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4530 /* A mock .gdb_index/.debug_names-like name index table, enough to
4531 exercise dw2_expand_symtabs_matching_symbol, which works with the
4532 mapped_index_base interface. Builds an index from the symbol list
4533 passed as parameter to the constructor. */
4534 class mock_mapped_index
: public mapped_index_base
4537 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4538 : m_symbol_table (symbols
)
4541 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4543 /* Return the number of names in the symbol table. */
4544 size_t symbol_name_count () const override
4546 return m_symbol_table
.size ();
4549 /* Get the name of the symbol at IDX in the symbol table. */
4550 const char *symbol_name_at (offset_type idx
) const override
4552 return m_symbol_table
[idx
];
4556 gdb::array_view
<const char *> m_symbol_table
;
4559 /* Convenience function that converts a NULL pointer to a "<null>"
4560 string, to pass to print routines. */
4563 string_or_null (const char *str
)
4565 return str
!= NULL
? str
: "<null>";
4568 /* Check if a lookup_name_info built from
4569 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4570 index. EXPECTED_LIST is the list of expected matches, in expected
4571 matching order. If no match expected, then an empty list is
4572 specified. Returns true on success. On failure prints a warning
4573 indicating the file:line that failed, and returns false. */
4576 check_match (const char *file
, int line
,
4577 mock_mapped_index
&mock_index
,
4578 const char *name
, symbol_name_match_type match_type
,
4579 bool completion_mode
,
4580 std::initializer_list
<const char *> expected_list
)
4582 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4584 bool matched
= true;
4586 auto mismatch
= [&] (const char *expected_str
,
4589 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4590 "expected=\"%s\", got=\"%s\"\n"),
4592 (match_type
== symbol_name_match_type::FULL
4594 name
, string_or_null (expected_str
), string_or_null (got
));
4598 auto expected_it
= expected_list
.begin ();
4599 auto expected_end
= expected_list
.end ();
4601 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4603 [&] (offset_type idx
)
4605 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4606 const char *expected_str
4607 = expected_it
== expected_end
? NULL
: *expected_it
++;
4609 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4610 mismatch (expected_str
, matched_name
);
4614 const char *expected_str
4615 = expected_it
== expected_end
? NULL
: *expected_it
++;
4616 if (expected_str
!= NULL
)
4617 mismatch (expected_str
, NULL
);
4622 /* The symbols added to the mock mapped_index for testing (in
4624 static const char *test_symbols
[] = {
4633 "ns2::tmpl<int>::foo2",
4634 "(anonymous namespace)::A::B::C",
4636 /* These are used to check that the increment-last-char in the
4637 matching algorithm for completion doesn't match "t1_fund" when
4638 completing "t1_func". */
4644 /* A UTF-8 name with multi-byte sequences to make sure that
4645 cp-name-parser understands this as a single identifier ("função"
4646 is "function" in PT). */
4649 /* \377 (0xff) is Latin1 'ÿ'. */
4652 /* \377 (0xff) is Latin1 'ÿ'. */
4656 /* A name with all sorts of complications. Starts with "z" to make
4657 it easier for the completion tests below. */
4658 #define Z_SYM_NAME \
4659 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4660 "::tuple<(anonymous namespace)::ui*, " \
4661 "std::default_delete<(anonymous namespace)::ui>, void>"
4666 /* Returns true if the mapped_index_base::find_name_component_bounds
4667 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4668 in completion mode. */
4671 check_find_bounds_finds (mapped_index_base
&index
,
4672 const char *search_name
,
4673 gdb::array_view
<const char *> expected_syms
)
4675 lookup_name_info
lookup_name (search_name
,
4676 symbol_name_match_type::FULL
, true);
4678 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4681 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4682 if (distance
!= expected_syms
.size ())
4685 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4687 auto nc_elem
= bounds
.first
+ exp_elem
;
4688 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4689 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4696 /* Test the lower-level mapped_index::find_name_component_bounds
4700 test_mapped_index_find_name_component_bounds ()
4702 mock_mapped_index
mock_index (test_symbols
);
4704 mock_index
.build_name_components ();
4706 /* Test the lower-level mapped_index::find_name_component_bounds
4707 method in completion mode. */
4709 static const char *expected_syms
[] = {
4714 SELF_CHECK (check_find_bounds_finds (mock_index
,
4715 "t1_func", expected_syms
));
4718 /* Check that the increment-last-char in the name matching algorithm
4719 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4721 static const char *expected_syms1
[] = {
4725 SELF_CHECK (check_find_bounds_finds (mock_index
,
4726 "\377", expected_syms1
));
4728 static const char *expected_syms2
[] = {
4731 SELF_CHECK (check_find_bounds_finds (mock_index
,
4732 "\377\377", expected_syms2
));
4736 /* Test dw2_expand_symtabs_matching_symbol. */
4739 test_dw2_expand_symtabs_matching_symbol ()
4741 mock_mapped_index
mock_index (test_symbols
);
4743 /* We let all tests run until the end even if some fails, for debug
4745 bool any_mismatch
= false;
4747 /* Create the expected symbols list (an initializer_list). Needed
4748 because lists have commas, and we need to pass them to CHECK,
4749 which is a macro. */
4750 #define EXPECT(...) { __VA_ARGS__ }
4752 /* Wrapper for check_match that passes down the current
4753 __FILE__/__LINE__. */
4754 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4755 any_mismatch |= !check_match (__FILE__, __LINE__, \
4757 NAME, MATCH_TYPE, COMPLETION_MODE, \
4760 /* Identity checks. */
4761 for (const char *sym
: test_symbols
)
4763 /* Should be able to match all existing symbols. */
4764 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4767 /* Should be able to match all existing symbols with
4769 std::string with_params
= std::string (sym
) + "(int)";
4770 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4773 /* Should be able to match all existing symbols with
4774 parameters and qualifiers. */
4775 with_params
= std::string (sym
) + " ( int ) const";
4776 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4779 /* This should really find sym, but cp-name-parser.y doesn't
4780 know about lvalue/rvalue qualifiers yet. */
4781 with_params
= std::string (sym
) + " ( int ) &&";
4782 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4786 /* Check that the name matching algorithm for completion doesn't get
4787 confused with Latin1 'ÿ' / 0xff. */
4789 static const char str
[] = "\377";
4790 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4791 EXPECT ("\377", "\377\377123"));
4794 /* Check that the increment-last-char in the matching algorithm for
4795 completion doesn't match "t1_fund" when completing "t1_func". */
4797 static const char str
[] = "t1_func";
4798 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4799 EXPECT ("t1_func", "t1_func1"));
4802 /* Check that completion mode works at each prefix of the expected
4805 static const char str
[] = "function(int)";
4806 size_t len
= strlen (str
);
4809 for (size_t i
= 1; i
< len
; i
++)
4811 lookup
.assign (str
, i
);
4812 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4813 EXPECT ("function"));
4817 /* While "w" is a prefix of both components, the match function
4818 should still only be called once. */
4820 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4822 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4826 /* Same, with a "complicated" symbol. */
4828 static const char str
[] = Z_SYM_NAME
;
4829 size_t len
= strlen (str
);
4832 for (size_t i
= 1; i
< len
; i
++)
4834 lookup
.assign (str
, i
);
4835 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4836 EXPECT (Z_SYM_NAME
));
4840 /* In FULL mode, an incomplete symbol doesn't match. */
4842 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4846 /* A complete symbol with parameters matches any overload, since the
4847 index has no overload info. */
4849 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4850 EXPECT ("std::zfunction", "std::zfunction2"));
4851 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4852 EXPECT ("std::zfunction", "std::zfunction2"));
4853 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4854 EXPECT ("std::zfunction", "std::zfunction2"));
4857 /* Check that whitespace is ignored appropriately. A symbol with a
4858 template argument list. */
4860 static const char expected
[] = "ns::foo<int>";
4861 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4863 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4867 /* Check that whitespace is ignored appropriately. A symbol with a
4868 template argument list that includes a pointer. */
4870 static const char expected
[] = "ns::foo<char*>";
4871 /* Try both completion and non-completion modes. */
4872 static const bool completion_mode
[2] = {false, true};
4873 for (size_t i
= 0; i
< 2; i
++)
4875 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4876 completion_mode
[i
], EXPECT (expected
));
4877 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4878 completion_mode
[i
], EXPECT (expected
));
4880 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4881 completion_mode
[i
], EXPECT (expected
));
4882 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4883 completion_mode
[i
], EXPECT (expected
));
4888 /* Check method qualifiers are ignored. */
4889 static const char expected
[] = "ns::foo<char*>";
4890 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4891 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4892 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4893 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4894 CHECK_MATCH ("foo < char * > ( int ) const",
4895 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4896 CHECK_MATCH ("foo < char * > ( int ) &&",
4897 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4900 /* Test lookup names that don't match anything. */
4902 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4905 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4909 /* Some wild matching tests, exercising "(anonymous namespace)",
4910 which should not be confused with a parameter list. */
4912 static const char *syms
[] = {
4916 "A :: B :: C ( int )",
4921 for (const char *s
: syms
)
4923 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4924 EXPECT ("(anonymous namespace)::A::B::C"));
4929 static const char expected
[] = "ns2::tmpl<int>::foo2";
4930 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4932 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4936 SELF_CHECK (!any_mismatch
);
4945 test_mapped_index_find_name_component_bounds ();
4946 test_dw2_expand_symtabs_matching_symbol ();
4949 }} // namespace selftests::dw2_expand_symtabs_matching
4951 #endif /* GDB_SELF_TEST */
4953 /* If FILE_MATCHER is NULL or if PER_CU has
4954 dwarf2_per_cu_quick_data::MARK set (see
4955 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4956 EXPANSION_NOTIFY on it. */
4959 dw2_expand_symtabs_matching_one
4960 (struct dwarf2_per_cu_data
*per_cu
,
4961 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4962 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4964 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4966 bool symtab_was_null
4967 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4969 dw2_instantiate_symtab (per_cu
, false);
4971 if (expansion_notify
!= NULL
4973 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4974 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4978 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4979 matched, to expand corresponding CUs that were marked. IDX is the
4980 index of the symbol name that matched. */
4983 dw2_expand_marked_cus
4984 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
4985 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4986 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4989 offset_type
*vec
, vec_len
, vec_idx
;
4990 bool global_seen
= false;
4991 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4993 vec
= (offset_type
*) (index
.constant_pool
4994 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4995 vec_len
= MAYBE_SWAP (vec
[0]);
4996 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4998 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4999 /* This value is only valid for index versions >= 7. */
5000 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5001 gdb_index_symbol_kind symbol_kind
=
5002 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5003 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5004 /* Only check the symbol attributes if they're present.
5005 Indices prior to version 7 don't record them,
5006 and indices >= 7 may elide them for certain symbols
5007 (gold does this). */
5010 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5012 /* Work around gold/15646. */
5015 if (!is_static
&& global_seen
)
5021 /* Only check the symbol's kind if it has one. */
5026 case VARIABLES_DOMAIN
:
5027 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5030 case FUNCTIONS_DOMAIN
:
5031 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5035 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5043 /* Don't crash on bad data. */
5044 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
5045 + dwarf2_per_objfile
->all_type_units
.size ()))
5047 complaint (_(".gdb_index entry has bad CU index"
5049 objfile_name (dwarf2_per_objfile
->objfile
));
5053 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
5054 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5059 /* If FILE_MATCHER is non-NULL, set all the
5060 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5061 that match FILE_MATCHER. */
5064 dw_expand_symtabs_matching_file_matcher
5065 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5066 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5068 if (file_matcher
== NULL
)
5071 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5073 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5075 NULL
, xcalloc
, xfree
));
5076 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5078 NULL
, xcalloc
, xfree
));
5080 /* The rule is CUs specify all the files, including those used by
5081 any TU, so there's no need to scan TUs here. */
5083 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5087 per_cu
->v
.quick
->mark
= 0;
5089 /* We only need to look at symtabs not already expanded. */
5090 if (per_cu
->v
.quick
->compunit_symtab
)
5093 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5094 if (file_data
== NULL
)
5097 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5099 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5101 per_cu
->v
.quick
->mark
= 1;
5105 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5107 const char *this_real_name
;
5109 if (file_matcher (file_data
->file_names
[j
], false))
5111 per_cu
->v
.quick
->mark
= 1;
5115 /* Before we invoke realpath, which can get expensive when many
5116 files are involved, do a quick comparison of the basenames. */
5117 if (!basenames_may_differ
5118 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5122 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5123 if (file_matcher (this_real_name
, false))
5125 per_cu
->v
.quick
->mark
= 1;
5130 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
5131 ? visited_found
.get ()
5132 : visited_not_found
.get (),
5139 dw2_expand_symtabs_matching
5140 (struct objfile
*objfile
,
5141 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5142 const lookup_name_info
&lookup_name
,
5143 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5144 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5145 enum search_domain kind
)
5147 struct dwarf2_per_objfile
*dwarf2_per_objfile
5148 = get_dwarf2_per_objfile (objfile
);
5150 /* index_table is NULL if OBJF_READNOW. */
5151 if (!dwarf2_per_objfile
->index_table
)
5154 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5156 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5158 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5160 kind
, [&] (offset_type idx
)
5162 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5163 expansion_notify
, kind
);
5168 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5171 static struct compunit_symtab
*
5172 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5177 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5178 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5181 if (cust
->includes
== NULL
)
5184 for (i
= 0; cust
->includes
[i
]; ++i
)
5186 struct compunit_symtab
*s
= cust
->includes
[i
];
5188 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5196 static struct compunit_symtab
*
5197 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5198 struct bound_minimal_symbol msymbol
,
5200 struct obj_section
*section
,
5203 struct dwarf2_per_cu_data
*data
;
5204 struct compunit_symtab
*result
;
5206 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
5209 CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
5210 SECT_OFF_TEXT (objfile
));
5211 data
= (struct dwarf2_per_cu_data
*) addrmap_find
5212 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
5216 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5217 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5218 paddress (get_objfile_arch (objfile
), pc
));
5221 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
5224 gdb_assert (result
!= NULL
);
5229 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5230 void *data
, int need_fullname
)
5232 struct dwarf2_per_objfile
*dwarf2_per_objfile
5233 = get_dwarf2_per_objfile (objfile
);
5235 if (!dwarf2_per_objfile
->filenames_cache
)
5237 dwarf2_per_objfile
->filenames_cache
.emplace ();
5239 htab_up
visited (htab_create_alloc (10,
5240 htab_hash_pointer
, htab_eq_pointer
,
5241 NULL
, xcalloc
, xfree
));
5243 /* The rule is CUs specify all the files, including those used
5244 by any TU, so there's no need to scan TUs here. We can
5245 ignore file names coming from already-expanded CUs. */
5247 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5249 if (per_cu
->v
.quick
->compunit_symtab
)
5251 void **slot
= htab_find_slot (visited
.get (),
5252 per_cu
->v
.quick
->file_names
,
5255 *slot
= per_cu
->v
.quick
->file_names
;
5259 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5261 /* We only need to look at symtabs not already expanded. */
5262 if (per_cu
->v
.quick
->compunit_symtab
)
5265 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5266 if (file_data
== NULL
)
5269 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5272 /* Already visited. */
5277 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5279 const char *filename
= file_data
->file_names
[j
];
5280 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5285 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5287 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5290 this_real_name
= gdb_realpath (filename
);
5291 (*fun
) (filename
, this_real_name
.get (), data
);
5296 dw2_has_symbols (struct objfile
*objfile
)
5301 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5304 dw2_find_last_source_symtab
,
5305 dw2_forget_cached_source_info
,
5306 dw2_map_symtabs_matching_filename
,
5310 dw2_expand_symtabs_for_function
,
5311 dw2_expand_all_symtabs
,
5312 dw2_expand_symtabs_with_fullname
,
5313 dw2_map_matching_symbols
,
5314 dw2_expand_symtabs_matching
,
5315 dw2_find_pc_sect_compunit_symtab
,
5317 dw2_map_symbol_filenames
5320 /* DWARF-5 debug_names reader. */
5322 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5323 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5325 /* A helper function that reads the .debug_names section in SECTION
5326 and fills in MAP. FILENAME is the name of the file containing the
5327 section; it is used for error reporting.
5329 Returns true if all went well, false otherwise. */
5332 read_debug_names_from_section (struct objfile
*objfile
,
5333 const char *filename
,
5334 struct dwarf2_section_info
*section
,
5335 mapped_debug_names
&map
)
5337 if (dwarf2_section_empty_p (section
))
5340 /* Older elfutils strip versions could keep the section in the main
5341 executable while splitting it for the separate debug info file. */
5342 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5345 dwarf2_read_section (objfile
, section
);
5347 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5349 const gdb_byte
*addr
= section
->buffer
;
5351 bfd
*const abfd
= get_section_bfd_owner (section
);
5353 unsigned int bytes_read
;
5354 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5357 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5358 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5359 if (bytes_read
+ length
!= section
->size
)
5361 /* There may be multiple per-CU indices. */
5362 warning (_("Section .debug_names in %s length %s does not match "
5363 "section length %s, ignoring .debug_names."),
5364 filename
, plongest (bytes_read
+ length
),
5365 pulongest (section
->size
));
5369 /* The version number. */
5370 uint16_t version
= read_2_bytes (abfd
, addr
);
5374 warning (_("Section .debug_names in %s has unsupported version %d, "
5375 "ignoring .debug_names."),
5381 uint16_t padding
= read_2_bytes (abfd
, addr
);
5385 warning (_("Section .debug_names in %s has unsupported padding %d, "
5386 "ignoring .debug_names."),
5391 /* comp_unit_count - The number of CUs in the CU list. */
5392 map
.cu_count
= read_4_bytes (abfd
, addr
);
5395 /* local_type_unit_count - The number of TUs in the local TU
5397 map
.tu_count
= read_4_bytes (abfd
, addr
);
5400 /* foreign_type_unit_count - The number of TUs in the foreign TU
5402 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5404 if (foreign_tu_count
!= 0)
5406 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5407 "ignoring .debug_names."),
5408 filename
, static_cast<unsigned long> (foreign_tu_count
));
5412 /* bucket_count - The number of hash buckets in the hash lookup
5414 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5417 /* name_count - The number of unique names in the index. */
5418 map
.name_count
= read_4_bytes (abfd
, addr
);
5421 /* abbrev_table_size - The size in bytes of the abbreviations
5423 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5426 /* augmentation_string_size - The size in bytes of the augmentation
5427 string. This value is rounded up to a multiple of 4. */
5428 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5430 map
.augmentation_is_gdb
= ((augmentation_string_size
5431 == sizeof (dwarf5_augmentation
))
5432 && memcmp (addr
, dwarf5_augmentation
,
5433 sizeof (dwarf5_augmentation
)) == 0);
5434 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5435 addr
+= augmentation_string_size
;
5438 map
.cu_table_reordered
= addr
;
5439 addr
+= map
.cu_count
* map
.offset_size
;
5441 /* List of Local TUs */
5442 map
.tu_table_reordered
= addr
;
5443 addr
+= map
.tu_count
* map
.offset_size
;
5445 /* Hash Lookup Table */
5446 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5447 addr
+= map
.bucket_count
* 4;
5448 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5449 addr
+= map
.name_count
* 4;
5452 map
.name_table_string_offs_reordered
= addr
;
5453 addr
+= map
.name_count
* map
.offset_size
;
5454 map
.name_table_entry_offs_reordered
= addr
;
5455 addr
+= map
.name_count
* map
.offset_size
;
5457 const gdb_byte
*abbrev_table_start
= addr
;
5460 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5465 const auto insertpair
5466 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5467 if (!insertpair
.second
)
5469 warning (_("Section .debug_names in %s has duplicate index %s, "
5470 "ignoring .debug_names."),
5471 filename
, pulongest (index_num
));
5474 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5475 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5480 mapped_debug_names::index_val::attr attr
;
5481 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5483 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5485 if (attr
.form
== DW_FORM_implicit_const
)
5487 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5491 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5493 indexval
.attr_vec
.push_back (std::move (attr
));
5496 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5498 warning (_("Section .debug_names in %s has abbreviation_table "
5499 "of size %s vs. written as %u, ignoring .debug_names."),
5500 filename
, plongest (addr
- abbrev_table_start
),
5504 map
.entry_pool
= addr
;
5509 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5513 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5514 const mapped_debug_names
&map
,
5515 dwarf2_section_info
§ion
,
5518 sect_offset sect_off_prev
;
5519 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5521 sect_offset sect_off_next
;
5522 if (i
< map
.cu_count
)
5525 = (sect_offset
) (extract_unsigned_integer
5526 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5528 map
.dwarf5_byte_order
));
5531 sect_off_next
= (sect_offset
) section
.size
;
5534 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5535 dwarf2_per_cu_data
*per_cu
5536 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5537 sect_off_prev
, length
);
5538 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5540 sect_off_prev
= sect_off_next
;
5544 /* Read the CU list from the mapped index, and use it to create all
5545 the CU objects for this dwarf2_per_objfile. */
5548 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5549 const mapped_debug_names
&map
,
5550 const mapped_debug_names
&dwz_map
)
5552 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5553 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5555 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5556 dwarf2_per_objfile
->info
,
5557 false /* is_dwz */);
5559 if (dwz_map
.cu_count
== 0)
5562 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5563 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5567 /* Read .debug_names. If everything went ok, initialize the "quick"
5568 elements of all the CUs and return true. Otherwise, return false. */
5571 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5573 std::unique_ptr
<mapped_debug_names
> map
5574 (new mapped_debug_names (dwarf2_per_objfile
));
5575 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5576 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5578 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5579 &dwarf2_per_objfile
->debug_names
,
5583 /* Don't use the index if it's empty. */
5584 if (map
->name_count
== 0)
5587 /* If there is a .dwz file, read it so we can get its CU list as
5589 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5592 if (!read_debug_names_from_section (objfile
,
5593 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5594 &dwz
->debug_names
, dwz_map
))
5596 warning (_("could not read '.debug_names' section from %s; skipping"),
5597 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5602 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5604 if (map
->tu_count
!= 0)
5606 /* We can only handle a single .debug_types when we have an
5608 if (dwarf2_per_objfile
->types
.size () != 1)
5611 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
5613 create_signatured_type_table_from_debug_names
5614 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5617 create_addrmap_from_aranges (dwarf2_per_objfile
,
5618 &dwarf2_per_objfile
->debug_aranges
);
5620 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5621 dwarf2_per_objfile
->using_index
= 1;
5622 dwarf2_per_objfile
->quick_file_names_table
=
5623 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5628 /* Type used to manage iterating over all CUs looking for a symbol for
5631 class dw2_debug_names_iterator
5634 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5635 gdb::optional
<block_enum
> block_index
,
5638 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5639 m_addr (find_vec_in_debug_names (map
, name
))
5642 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5643 search_domain search
, uint32_t namei
)
5646 m_addr (find_vec_in_debug_names (map
, namei
))
5649 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5650 block_enum block_index
, domain_enum domain
,
5652 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5653 m_addr (find_vec_in_debug_names (map
, namei
))
5656 /* Return the next matching CU or NULL if there are no more. */
5657 dwarf2_per_cu_data
*next ();
5660 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5662 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5665 /* The internalized form of .debug_names. */
5666 const mapped_debug_names
&m_map
;
5668 /* If set, only look for symbols that match that block. Valid values are
5669 GLOBAL_BLOCK and STATIC_BLOCK. */
5670 const gdb::optional
<block_enum
> m_block_index
;
5672 /* The kind of symbol we're looking for. */
5673 const domain_enum m_domain
= UNDEF_DOMAIN
;
5674 const search_domain m_search
= ALL_DOMAIN
;
5676 /* The list of CUs from the index entry of the symbol, or NULL if
5678 const gdb_byte
*m_addr
;
5682 mapped_debug_names::namei_to_name (uint32_t namei
) const
5684 const ULONGEST namei_string_offs
5685 = extract_unsigned_integer ((name_table_string_offs_reordered
5686 + namei
* offset_size
),
5689 return read_indirect_string_at_offset
5690 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5693 /* Find a slot in .debug_names for the object named NAME. If NAME is
5694 found, return pointer to its pool data. If NAME cannot be found,
5698 dw2_debug_names_iterator::find_vec_in_debug_names
5699 (const mapped_debug_names
&map
, const char *name
)
5701 int (*cmp
) (const char *, const char *);
5703 gdb::unique_xmalloc_ptr
<char> without_params
;
5704 if (current_language
->la_language
== language_cplus
5705 || current_language
->la_language
== language_fortran
5706 || current_language
->la_language
== language_d
)
5708 /* NAME is already canonical. Drop any qualifiers as
5709 .debug_names does not contain any. */
5711 if (strchr (name
, '(') != NULL
)
5713 without_params
= cp_remove_params (name
);
5714 if (without_params
!= NULL
)
5715 name
= without_params
.get ();
5719 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5721 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5723 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5724 (map
.bucket_table_reordered
5725 + (full_hash
% map
.bucket_count
)), 4,
5726 map
.dwarf5_byte_order
);
5730 if (namei
>= map
.name_count
)
5732 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5734 namei
, map
.name_count
,
5735 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5741 const uint32_t namei_full_hash
5742 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5743 (map
.hash_table_reordered
+ namei
), 4,
5744 map
.dwarf5_byte_order
);
5745 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5748 if (full_hash
== namei_full_hash
)
5750 const char *const namei_string
= map
.namei_to_name (namei
);
5752 #if 0 /* An expensive sanity check. */
5753 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5755 complaint (_("Wrong .debug_names hash for string at index %u "
5757 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5762 if (cmp (namei_string
, name
) == 0)
5764 const ULONGEST namei_entry_offs
5765 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5766 + namei
* map
.offset_size
),
5767 map
.offset_size
, map
.dwarf5_byte_order
);
5768 return map
.entry_pool
+ namei_entry_offs
;
5773 if (namei
>= map
.name_count
)
5779 dw2_debug_names_iterator::find_vec_in_debug_names
5780 (const mapped_debug_names
&map
, uint32_t namei
)
5782 if (namei
>= map
.name_count
)
5784 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5786 namei
, map
.name_count
,
5787 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5791 const ULONGEST namei_entry_offs
5792 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5793 + namei
* map
.offset_size
),
5794 map
.offset_size
, map
.dwarf5_byte_order
);
5795 return map
.entry_pool
+ namei_entry_offs
;
5798 /* See dw2_debug_names_iterator. */
5800 dwarf2_per_cu_data
*
5801 dw2_debug_names_iterator::next ()
5806 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5807 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5808 bfd
*const abfd
= objfile
->obfd
;
5812 unsigned int bytes_read
;
5813 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5814 m_addr
+= bytes_read
;
5818 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5819 if (indexval_it
== m_map
.abbrev_map
.cend ())
5821 complaint (_("Wrong .debug_names undefined abbrev code %s "
5823 pulongest (abbrev
), objfile_name (objfile
));
5826 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5827 enum class symbol_linkage
{
5831 } symbol_linkage_
= symbol_linkage::unknown
;
5832 dwarf2_per_cu_data
*per_cu
= NULL
;
5833 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5838 case DW_FORM_implicit_const
:
5839 ull
= attr
.implicit_const
;
5841 case DW_FORM_flag_present
:
5845 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5846 m_addr
+= bytes_read
;
5849 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5850 dwarf_form_name (attr
.form
),
5851 objfile_name (objfile
));
5854 switch (attr
.dw_idx
)
5856 case DW_IDX_compile_unit
:
5857 /* Don't crash on bad data. */
5858 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5860 complaint (_(".debug_names entry has bad CU index %s"
5863 objfile_name (dwarf2_per_objfile
->objfile
));
5866 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5868 case DW_IDX_type_unit
:
5869 /* Don't crash on bad data. */
5870 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5872 complaint (_(".debug_names entry has bad TU index %s"
5875 objfile_name (dwarf2_per_objfile
->objfile
));
5878 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5880 case DW_IDX_GNU_internal
:
5881 if (!m_map
.augmentation_is_gdb
)
5883 symbol_linkage_
= symbol_linkage::static_
;
5885 case DW_IDX_GNU_external
:
5886 if (!m_map
.augmentation_is_gdb
)
5888 symbol_linkage_
= symbol_linkage::extern_
;
5893 /* Skip if already read in. */
5894 if (per_cu
->v
.quick
->compunit_symtab
)
5897 /* Check static vs global. */
5898 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5900 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5901 const bool symbol_is_static
=
5902 symbol_linkage_
== symbol_linkage::static_
;
5903 if (want_static
!= symbol_is_static
)
5907 /* Match dw2_symtab_iter_next, symbol_kind
5908 and debug_names::psymbol_tag. */
5912 switch (indexval
.dwarf_tag
)
5914 case DW_TAG_variable
:
5915 case DW_TAG_subprogram
:
5916 /* Some types are also in VAR_DOMAIN. */
5917 case DW_TAG_typedef
:
5918 case DW_TAG_structure_type
:
5925 switch (indexval
.dwarf_tag
)
5927 case DW_TAG_typedef
:
5928 case DW_TAG_structure_type
:
5935 switch (indexval
.dwarf_tag
)
5938 case DW_TAG_variable
:
5948 /* Match dw2_expand_symtabs_matching, symbol_kind and
5949 debug_names::psymbol_tag. */
5952 case VARIABLES_DOMAIN
:
5953 switch (indexval
.dwarf_tag
)
5955 case DW_TAG_variable
:
5961 case FUNCTIONS_DOMAIN
:
5962 switch (indexval
.dwarf_tag
)
5964 case DW_TAG_subprogram
:
5971 switch (indexval
.dwarf_tag
)
5973 case DW_TAG_typedef
:
5974 case DW_TAG_structure_type
:
5987 static struct compunit_symtab
*
5988 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5989 const char *name
, domain_enum domain
)
5991 struct dwarf2_per_objfile
*dwarf2_per_objfile
5992 = get_dwarf2_per_objfile (objfile
);
5994 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
5997 /* index is NULL if OBJF_READNOW. */
6000 const auto &map
= *mapp
;
6002 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
6004 struct compunit_symtab
*stab_best
= NULL
;
6005 struct dwarf2_per_cu_data
*per_cu
;
6006 while ((per_cu
= iter
.next ()) != NULL
)
6008 struct symbol
*sym
, *with_opaque
= NULL
;
6009 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
6010 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6011 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6013 sym
= block_find_symbol (block
, name
, domain
,
6014 block_find_non_opaque_type_preferred
,
6017 /* Some caution must be observed with overloaded functions and
6018 methods, since the index will not contain any overload
6019 information (but NAME might contain it). */
6022 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6024 if (with_opaque
!= NULL
6025 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6028 /* Keep looking through other CUs. */
6034 /* This dumps minimal information about .debug_names. It is called
6035 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6036 uses this to verify that .debug_names has been loaded. */
6039 dw2_debug_names_dump (struct objfile
*objfile
)
6041 struct dwarf2_per_objfile
*dwarf2_per_objfile
6042 = get_dwarf2_per_objfile (objfile
);
6044 gdb_assert (dwarf2_per_objfile
->using_index
);
6045 printf_filtered (".debug_names:");
6046 if (dwarf2_per_objfile
->debug_names_table
)
6047 printf_filtered (" exists\n");
6049 printf_filtered (" faked for \"readnow\"\n");
6050 printf_filtered ("\n");
6054 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6055 const char *func_name
)
6057 struct dwarf2_per_objfile
*dwarf2_per_objfile
6058 = get_dwarf2_per_objfile (objfile
);
6060 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6061 if (dwarf2_per_objfile
->debug_names_table
)
6063 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6065 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
6067 struct dwarf2_per_cu_data
*per_cu
;
6068 while ((per_cu
= iter
.next ()) != NULL
)
6069 dw2_instantiate_symtab (per_cu
, false);
6074 dw2_debug_names_map_matching_symbols
6075 (struct objfile
*objfile
,
6076 const lookup_name_info
&name
, domain_enum domain
,
6078 gdb::function_view
<symbol_found_callback_ftype
> callback
,
6079 symbol_compare_ftype
*ordered_compare
)
6081 struct dwarf2_per_objfile
*dwarf2_per_objfile
6082 = get_dwarf2_per_objfile (objfile
);
6084 /* debug_names_table is NULL if OBJF_READNOW. */
6085 if (!dwarf2_per_objfile
->debug_names_table
)
6088 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6089 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
6091 const char *match_name
= name
.ada ().lookup_name ().c_str ();
6092 auto matcher
= [&] (const char *symname
)
6094 if (ordered_compare
== nullptr)
6096 return ordered_compare (symname
, match_name
) == 0;
6099 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
6100 [&] (offset_type namei
)
6102 /* The name was matched, now expand corresponding CUs that were
6104 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
6106 struct dwarf2_per_cu_data
*per_cu
;
6107 while ((per_cu
= iter
.next ()) != NULL
)
6108 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
6112 /* It's a shame we couldn't do this inside the
6113 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
6114 that have already been expanded. Instead, this loop matches what
6115 the psymtab code does. */
6116 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
6118 struct compunit_symtab
*cust
= per_cu
->v
.quick
->compunit_symtab
;
6119 if (cust
!= nullptr)
6121 const struct block
*block
6122 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
6123 if (!iterate_over_symbols_terminated (block
, name
,
6131 dw2_debug_names_expand_symtabs_matching
6132 (struct objfile
*objfile
,
6133 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6134 const lookup_name_info
&lookup_name
,
6135 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6136 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6137 enum search_domain kind
)
6139 struct dwarf2_per_objfile
*dwarf2_per_objfile
6140 = get_dwarf2_per_objfile (objfile
);
6142 /* debug_names_table is NULL if OBJF_READNOW. */
6143 if (!dwarf2_per_objfile
->debug_names_table
)
6146 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6148 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6150 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6152 kind
, [&] (offset_type namei
)
6154 /* The name was matched, now expand corresponding CUs that were
6156 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6158 struct dwarf2_per_cu_data
*per_cu
;
6159 while ((per_cu
= iter
.next ()) != NULL
)
6160 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6166 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6169 dw2_find_last_source_symtab
,
6170 dw2_forget_cached_source_info
,
6171 dw2_map_symtabs_matching_filename
,
6172 dw2_debug_names_lookup_symbol
,
6174 dw2_debug_names_dump
,
6175 dw2_debug_names_expand_symtabs_for_function
,
6176 dw2_expand_all_symtabs
,
6177 dw2_expand_symtabs_with_fullname
,
6178 dw2_debug_names_map_matching_symbols
,
6179 dw2_debug_names_expand_symtabs_matching
,
6180 dw2_find_pc_sect_compunit_symtab
,
6182 dw2_map_symbol_filenames
6185 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
6186 to either a dwarf2_per_objfile or dwz_file object. */
6188 template <typename T
>
6189 static gdb::array_view
<const gdb_byte
>
6190 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
6192 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
6194 if (dwarf2_section_empty_p (section
))
6197 /* Older elfutils strip versions could keep the section in the main
6198 executable while splitting it for the separate debug info file. */
6199 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
6202 dwarf2_read_section (obj
, section
);
6204 /* dwarf2_section_info::size is a bfd_size_type, while
6205 gdb::array_view works with size_t. On 32-bit hosts, with
6206 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
6207 is 32-bit. So we need an explicit narrowing conversion here.
6208 This is fine, because it's impossible to allocate or mmap an
6209 array/buffer larger than what size_t can represent. */
6210 return gdb::make_array_view (section
->buffer
, section
->size
);
6213 /* Lookup the index cache for the contents of the index associated to
6216 static gdb::array_view
<const gdb_byte
>
6217 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
6219 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
6220 if (build_id
== nullptr)
6223 return global_index_cache
.lookup_gdb_index (build_id
,
6224 &dwarf2_obj
->index_cache_res
);
6227 /* Same as the above, but for DWZ. */
6229 static gdb::array_view
<const gdb_byte
>
6230 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
6232 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
6233 if (build_id
== nullptr)
6236 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
6239 /* See symfile.h. */
6242 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6244 struct dwarf2_per_objfile
*dwarf2_per_objfile
6245 = get_dwarf2_per_objfile (objfile
);
6247 /* If we're about to read full symbols, don't bother with the
6248 indices. In this case we also don't care if some other debug
6249 format is making psymtabs, because they are all about to be
6251 if ((objfile
->flags
& OBJF_READNOW
))
6253 dwarf2_per_objfile
->using_index
= 1;
6254 create_all_comp_units (dwarf2_per_objfile
);
6255 create_all_type_units (dwarf2_per_objfile
);
6256 dwarf2_per_objfile
->quick_file_names_table
6257 = create_quick_file_names_table
6258 (dwarf2_per_objfile
->all_comp_units
.size ());
6260 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
6261 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
6263 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6265 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6266 struct dwarf2_per_cu_quick_data
);
6269 /* Return 1 so that gdb sees the "quick" functions. However,
6270 these functions will be no-ops because we will have expanded
6272 *index_kind
= dw_index_kind::GDB_INDEX
;
6276 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6278 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6282 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6283 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
6284 get_gdb_index_contents_from_section
<dwz_file
>))
6286 *index_kind
= dw_index_kind::GDB_INDEX
;
6290 /* ... otherwise, try to find the index in the index cache. */
6291 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6292 get_gdb_index_contents_from_cache
,
6293 get_gdb_index_contents_from_cache_dwz
))
6295 global_index_cache
.hit ();
6296 *index_kind
= dw_index_kind::GDB_INDEX
;
6300 global_index_cache
.miss ();
6306 /* Build a partial symbol table. */
6309 dwarf2_build_psymtabs (struct objfile
*objfile
)
6311 struct dwarf2_per_objfile
*dwarf2_per_objfile
6312 = get_dwarf2_per_objfile (objfile
);
6314 init_psymbol_list (objfile
, 1024);
6318 /* This isn't really ideal: all the data we allocate on the
6319 objfile's obstack is still uselessly kept around. However,
6320 freeing it seems unsafe. */
6321 psymtab_discarder
psymtabs (objfile
);
6322 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6325 /* (maybe) store an index in the cache. */
6326 global_index_cache
.store (dwarf2_per_objfile
);
6328 catch (const gdb_exception_error
&except
)
6330 exception_print (gdb_stderr
, except
);
6334 /* Return the total length of the CU described by HEADER. */
6337 get_cu_length (const struct comp_unit_head
*header
)
6339 return header
->initial_length_size
+ header
->length
;
6342 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6345 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6347 sect_offset bottom
= cu_header
->sect_off
;
6348 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6350 return sect_off
>= bottom
&& sect_off
< top
;
6353 /* Find the base address of the compilation unit for range lists and
6354 location lists. It will normally be specified by DW_AT_low_pc.
6355 In DWARF-3 draft 4, the base address could be overridden by
6356 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6357 compilation units with discontinuous ranges. */
6360 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6362 struct attribute
*attr
;
6365 cu
->base_address
= 0;
6367 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6370 cu
->base_address
= attr_value_as_address (attr
);
6375 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6378 cu
->base_address
= attr_value_as_address (attr
);
6384 /* Read in the comp unit header information from the debug_info at info_ptr.
6385 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6386 NOTE: This leaves members offset, first_die_offset to be filled in
6389 static const gdb_byte
*
6390 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6391 const gdb_byte
*info_ptr
,
6392 struct dwarf2_section_info
*section
,
6393 rcuh_kind section_kind
)
6396 unsigned int bytes_read
;
6397 const char *filename
= get_section_file_name (section
);
6398 bfd
*abfd
= get_section_bfd_owner (section
);
6400 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6401 cu_header
->initial_length_size
= bytes_read
;
6402 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6403 info_ptr
+= bytes_read
;
6404 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6405 if (cu_header
->version
< 2 || cu_header
->version
> 5)
6406 error (_("Dwarf Error: wrong version in compilation unit header "
6407 "(is %d, should be 2, 3, 4 or 5) [in module %s]"),
6408 cu_header
->version
, filename
);
6410 if (cu_header
->version
< 5)
6411 switch (section_kind
)
6413 case rcuh_kind::COMPILE
:
6414 cu_header
->unit_type
= DW_UT_compile
;
6416 case rcuh_kind::TYPE
:
6417 cu_header
->unit_type
= DW_UT_type
;
6420 internal_error (__FILE__
, __LINE__
,
6421 _("read_comp_unit_head: invalid section_kind"));
6425 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6426 (read_1_byte (abfd
, info_ptr
));
6428 switch (cu_header
->unit_type
)
6432 case DW_UT_skeleton
:
6433 case DW_UT_split_compile
:
6434 if (section_kind
!= rcuh_kind::COMPILE
)
6435 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6436 "(is %s, should be %s) [in module %s]"),
6437 dwarf_unit_type_name (cu_header
->unit_type
),
6438 dwarf_unit_type_name (DW_UT_type
), filename
);
6441 case DW_UT_split_type
:
6442 section_kind
= rcuh_kind::TYPE
;
6445 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6446 "(is %#04x, should be one of: %s, %s, %s, %s or %s) "
6447 "[in module %s]"), cu_header
->unit_type
,
6448 dwarf_unit_type_name (DW_UT_compile
),
6449 dwarf_unit_type_name (DW_UT_skeleton
),
6450 dwarf_unit_type_name (DW_UT_split_compile
),
6451 dwarf_unit_type_name (DW_UT_type
),
6452 dwarf_unit_type_name (DW_UT_split_type
), filename
);
6455 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6458 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6461 info_ptr
+= bytes_read
;
6462 if (cu_header
->version
< 5)
6464 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6467 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6468 if (signed_addr
< 0)
6469 internal_error (__FILE__
, __LINE__
,
6470 _("read_comp_unit_head: dwarf from non elf file"));
6471 cu_header
->signed_addr_p
= signed_addr
;
6473 bool header_has_signature
= section_kind
== rcuh_kind::TYPE
6474 || cu_header
->unit_type
== DW_UT_skeleton
6475 || cu_header
->unit_type
== DW_UT_split_compile
;
6477 if (header_has_signature
)
6479 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6483 if (section_kind
== rcuh_kind::TYPE
)
6485 LONGEST type_offset
;
6486 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6487 info_ptr
+= bytes_read
;
6488 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6489 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6490 error (_("Dwarf Error: Too big type_offset in compilation unit "
6491 "header (is %s) [in module %s]"), plongest (type_offset
),
6498 /* Helper function that returns the proper abbrev section for
6501 static struct dwarf2_section_info
*
6502 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6504 struct dwarf2_section_info
*abbrev
;
6505 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6507 if (this_cu
->is_dwz
)
6508 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6510 abbrev
= &dwarf2_per_objfile
->abbrev
;
6515 /* Subroutine of read_and_check_comp_unit_head and
6516 read_and_check_type_unit_head to simplify them.
6517 Perform various error checking on the header. */
6520 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6521 struct comp_unit_head
*header
,
6522 struct dwarf2_section_info
*section
,
6523 struct dwarf2_section_info
*abbrev_section
)
6525 const char *filename
= get_section_file_name (section
);
6527 if (to_underlying (header
->abbrev_sect_off
)
6528 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6529 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6530 "(offset %s + 6) [in module %s]"),
6531 sect_offset_str (header
->abbrev_sect_off
),
6532 sect_offset_str (header
->sect_off
),
6535 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6536 avoid potential 32-bit overflow. */
6537 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6539 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6540 "(offset %s + 0) [in module %s]"),
6541 header
->length
, sect_offset_str (header
->sect_off
),
6545 /* Read in a CU/TU header and perform some basic error checking.
6546 The contents of the header are stored in HEADER.
6547 The result is a pointer to the start of the first DIE. */
6549 static const gdb_byte
*
6550 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6551 struct comp_unit_head
*header
,
6552 struct dwarf2_section_info
*section
,
6553 struct dwarf2_section_info
*abbrev_section
,
6554 const gdb_byte
*info_ptr
,
6555 rcuh_kind section_kind
)
6557 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6559 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6561 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6563 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6565 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6571 /* Fetch the abbreviation table offset from a comp or type unit header. */
6574 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6575 struct dwarf2_section_info
*section
,
6576 sect_offset sect_off
)
6578 bfd
*abfd
= get_section_bfd_owner (section
);
6579 const gdb_byte
*info_ptr
;
6580 unsigned int initial_length_size
, offset_size
;
6583 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6584 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6585 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6586 offset_size
= initial_length_size
== 4 ? 4 : 8;
6587 info_ptr
+= initial_length_size
;
6589 version
= read_2_bytes (abfd
, info_ptr
);
6593 /* Skip unit type and address size. */
6597 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6600 /* Allocate a new partial symtab for file named NAME and mark this new
6601 partial symtab as being an include of PST. */
6604 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6605 struct objfile
*objfile
)
6607 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6609 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6611 /* It shares objfile->objfile_obstack. */
6612 subpst
->dirname
= pst
->dirname
;
6615 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6616 subpst
->dependencies
[0] = pst
;
6617 subpst
->number_of_dependencies
= 1;
6619 subpst
->read_symtab
= pst
->read_symtab
;
6621 /* No private part is necessary for include psymtabs. This property
6622 can be used to differentiate between such include psymtabs and
6623 the regular ones. */
6624 subpst
->read_symtab_private
= NULL
;
6627 /* Read the Line Number Program data and extract the list of files
6628 included by the source file represented by PST. Build an include
6629 partial symtab for each of these included files. */
6632 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6633 struct die_info
*die
,
6634 struct partial_symtab
*pst
)
6637 struct attribute
*attr
;
6639 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6641 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6643 return; /* No linetable, so no includes. */
6645 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6646 that we pass in the raw text_low here; that is ok because we're
6647 only decoding the line table to make include partial symtabs, and
6648 so the addresses aren't really used. */
6649 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6650 pst
->raw_text_low (), 1);
6654 hash_signatured_type (const void *item
)
6656 const struct signatured_type
*sig_type
6657 = (const struct signatured_type
*) item
;
6659 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6660 return sig_type
->signature
;
6664 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6666 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6667 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6669 return lhs
->signature
== rhs
->signature
;
6672 /* Allocate a hash table for signatured types. */
6675 allocate_signatured_type_table (struct objfile
*objfile
)
6677 return htab_create_alloc_ex (41,
6678 hash_signatured_type
,
6681 &objfile
->objfile_obstack
,
6682 hashtab_obstack_allocate
,
6683 dummy_obstack_deallocate
);
6686 /* A helper function to add a signatured type CU to a table. */
6689 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6691 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6692 std::vector
<signatured_type
*> *all_type_units
6693 = (std::vector
<signatured_type
*> *) datum
;
6695 all_type_units
->push_back (sigt
);
6700 /* A helper for create_debug_types_hash_table. Read types from SECTION
6701 and fill them into TYPES_HTAB. It will process only type units,
6702 therefore DW_UT_type. */
6705 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6706 struct dwo_file
*dwo_file
,
6707 dwarf2_section_info
*section
, htab_t
&types_htab
,
6708 rcuh_kind section_kind
)
6710 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6711 struct dwarf2_section_info
*abbrev_section
;
6713 const gdb_byte
*info_ptr
, *end_ptr
;
6715 abbrev_section
= (dwo_file
!= NULL
6716 ? &dwo_file
->sections
.abbrev
6717 : &dwarf2_per_objfile
->abbrev
);
6719 if (dwarf_read_debug
)
6720 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6721 get_section_name (section
),
6722 get_section_file_name (abbrev_section
));
6724 dwarf2_read_section (objfile
, section
);
6725 info_ptr
= section
->buffer
;
6727 if (info_ptr
== NULL
)
6730 /* We can't set abfd until now because the section may be empty or
6731 not present, in which case the bfd is unknown. */
6732 abfd
= get_section_bfd_owner (section
);
6734 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6735 because we don't need to read any dies: the signature is in the
6738 end_ptr
= info_ptr
+ section
->size
;
6739 while (info_ptr
< end_ptr
)
6741 struct signatured_type
*sig_type
;
6742 struct dwo_unit
*dwo_tu
;
6744 const gdb_byte
*ptr
= info_ptr
;
6745 struct comp_unit_head header
;
6746 unsigned int length
;
6748 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6750 /* Initialize it due to a false compiler warning. */
6751 header
.signature
= -1;
6752 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6754 /* We need to read the type's signature in order to build the hash
6755 table, but we don't need anything else just yet. */
6757 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6758 abbrev_section
, ptr
, section_kind
);
6760 length
= get_cu_length (&header
);
6762 /* Skip dummy type units. */
6763 if (ptr
>= info_ptr
+ length
6764 || peek_abbrev_code (abfd
, ptr
) == 0
6765 || header
.unit_type
!= DW_UT_type
)
6771 if (types_htab
== NULL
)
6774 types_htab
= allocate_dwo_unit_table (objfile
);
6776 types_htab
= allocate_signatured_type_table (objfile
);
6782 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6784 dwo_tu
->dwo_file
= dwo_file
;
6785 dwo_tu
->signature
= header
.signature
;
6786 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6787 dwo_tu
->section
= section
;
6788 dwo_tu
->sect_off
= sect_off
;
6789 dwo_tu
->length
= length
;
6793 /* N.B.: type_offset is not usable if this type uses a DWO file.
6794 The real type_offset is in the DWO file. */
6796 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6797 struct signatured_type
);
6798 sig_type
->signature
= header
.signature
;
6799 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6800 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6801 sig_type
->per_cu
.is_debug_types
= 1;
6802 sig_type
->per_cu
.section
= section
;
6803 sig_type
->per_cu
.sect_off
= sect_off
;
6804 sig_type
->per_cu
.length
= length
;
6807 slot
= htab_find_slot (types_htab
,
6808 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6810 gdb_assert (slot
!= NULL
);
6813 sect_offset dup_sect_off
;
6817 const struct dwo_unit
*dup_tu
6818 = (const struct dwo_unit
*) *slot
;
6820 dup_sect_off
= dup_tu
->sect_off
;
6824 const struct signatured_type
*dup_tu
6825 = (const struct signatured_type
*) *slot
;
6827 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6830 complaint (_("debug type entry at offset %s is duplicate to"
6831 " the entry at offset %s, signature %s"),
6832 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6833 hex_string (header
.signature
));
6835 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6837 if (dwarf_read_debug
> 1)
6838 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6839 sect_offset_str (sect_off
),
6840 hex_string (header
.signature
));
6846 /* Create the hash table of all entries in the .debug_types
6847 (or .debug_types.dwo) section(s).
6848 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6849 otherwise it is NULL.
6851 The result is a pointer to the hash table or NULL if there are no types.
6853 Note: This function processes DWO files only, not DWP files. */
6856 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6857 struct dwo_file
*dwo_file
,
6858 gdb::array_view
<dwarf2_section_info
> type_sections
,
6861 for (dwarf2_section_info
§ion
: type_sections
)
6862 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6863 types_htab
, rcuh_kind::TYPE
);
6866 /* Create the hash table of all entries in the .debug_types section,
6867 and initialize all_type_units.
6868 The result is zero if there is an error (e.g. missing .debug_types section),
6869 otherwise non-zero. */
6872 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6874 htab_t types_htab
= NULL
;
6876 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6877 &dwarf2_per_objfile
->info
, types_htab
,
6878 rcuh_kind::COMPILE
);
6879 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6880 dwarf2_per_objfile
->types
, types_htab
);
6881 if (types_htab
== NULL
)
6883 dwarf2_per_objfile
->signatured_types
= NULL
;
6887 dwarf2_per_objfile
->signatured_types
= types_htab
;
6889 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6890 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6892 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6893 &dwarf2_per_objfile
->all_type_units
);
6898 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6899 If SLOT is non-NULL, it is the entry to use in the hash table.
6900 Otherwise we find one. */
6902 static struct signatured_type
*
6903 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6906 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6908 if (dwarf2_per_objfile
->all_type_units
.size ()
6909 == dwarf2_per_objfile
->all_type_units
.capacity ())
6910 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6912 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6913 struct signatured_type
);
6915 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6916 sig_type
->signature
= sig
;
6917 sig_type
->per_cu
.is_debug_types
= 1;
6918 if (dwarf2_per_objfile
->using_index
)
6920 sig_type
->per_cu
.v
.quick
=
6921 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6922 struct dwarf2_per_cu_quick_data
);
6927 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6930 gdb_assert (*slot
== NULL
);
6932 /* The rest of sig_type must be filled in by the caller. */
6936 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6937 Fill in SIG_ENTRY with DWO_ENTRY. */
6940 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6941 struct signatured_type
*sig_entry
,
6942 struct dwo_unit
*dwo_entry
)
6944 /* Make sure we're not clobbering something we don't expect to. */
6945 gdb_assert (! sig_entry
->per_cu
.queued
);
6946 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6947 if (dwarf2_per_objfile
->using_index
)
6949 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6950 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6953 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6954 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6955 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6956 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6957 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6959 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6960 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6961 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6962 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6963 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6964 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6965 sig_entry
->dwo_unit
= dwo_entry
;
6968 /* Subroutine of lookup_signatured_type.
6969 If we haven't read the TU yet, create the signatured_type data structure
6970 for a TU to be read in directly from a DWO file, bypassing the stub.
6971 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6972 using .gdb_index, then when reading a CU we want to stay in the DWO file
6973 containing that CU. Otherwise we could end up reading several other DWO
6974 files (due to comdat folding) to process the transitive closure of all the
6975 mentioned TUs, and that can be slow. The current DWO file will have every
6976 type signature that it needs.
6977 We only do this for .gdb_index because in the psymtab case we already have
6978 to read all the DWOs to build the type unit groups. */
6980 static struct signatured_type
*
6981 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6983 struct dwarf2_per_objfile
*dwarf2_per_objfile
6984 = cu
->per_cu
->dwarf2_per_objfile
;
6985 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6986 struct dwo_file
*dwo_file
;
6987 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6988 struct signatured_type find_sig_entry
, *sig_entry
;
6991 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6993 /* If TU skeletons have been removed then we may not have read in any
6995 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6997 dwarf2_per_objfile
->signatured_types
6998 = allocate_signatured_type_table (objfile
);
7001 /* We only ever need to read in one copy of a signatured type.
7002 Use the global signatured_types array to do our own comdat-folding
7003 of types. If this is the first time we're reading this TU, and
7004 the TU has an entry in .gdb_index, replace the recorded data from
7005 .gdb_index with this TU. */
7007 find_sig_entry
.signature
= sig
;
7008 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7009 &find_sig_entry
, INSERT
);
7010 sig_entry
= (struct signatured_type
*) *slot
;
7012 /* We can get here with the TU already read, *or* in the process of being
7013 read. Don't reassign the global entry to point to this DWO if that's
7014 the case. Also note that if the TU is already being read, it may not
7015 have come from a DWO, the program may be a mix of Fission-compiled
7016 code and non-Fission-compiled code. */
7018 /* Have we already tried to read this TU?
7019 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7020 needn't exist in the global table yet). */
7021 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
7024 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
7025 dwo_unit of the TU itself. */
7026 dwo_file
= cu
->dwo_unit
->dwo_file
;
7028 /* Ok, this is the first time we're reading this TU. */
7029 if (dwo_file
->tus
== NULL
)
7031 find_dwo_entry
.signature
= sig
;
7032 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
7033 if (dwo_entry
== NULL
)
7036 /* If the global table doesn't have an entry for this TU, add one. */
7037 if (sig_entry
== NULL
)
7038 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7040 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7041 sig_entry
->per_cu
.tu_read
= 1;
7045 /* Subroutine of lookup_signatured_type.
7046 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
7047 then try the DWP file. If the TU stub (skeleton) has been removed then
7048 it won't be in .gdb_index. */
7050 static struct signatured_type
*
7051 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7053 struct dwarf2_per_objfile
*dwarf2_per_objfile
7054 = cu
->per_cu
->dwarf2_per_objfile
;
7055 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7056 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
7057 struct dwo_unit
*dwo_entry
;
7058 struct signatured_type find_sig_entry
, *sig_entry
;
7061 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
7062 gdb_assert (dwp_file
!= NULL
);
7064 /* If TU skeletons have been removed then we may not have read in any
7066 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7068 dwarf2_per_objfile
->signatured_types
7069 = allocate_signatured_type_table (objfile
);
7072 find_sig_entry
.signature
= sig
;
7073 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7074 &find_sig_entry
, INSERT
);
7075 sig_entry
= (struct signatured_type
*) *slot
;
7077 /* Have we already tried to read this TU?
7078 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7079 needn't exist in the global table yet). */
7080 if (sig_entry
!= NULL
)
7083 if (dwp_file
->tus
== NULL
)
7085 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
7086 sig
, 1 /* is_debug_types */);
7087 if (dwo_entry
== NULL
)
7090 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7091 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7096 /* Lookup a signature based type for DW_FORM_ref_sig8.
7097 Returns NULL if signature SIG is not present in the table.
7098 It is up to the caller to complain about this. */
7100 static struct signatured_type
*
7101 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7103 struct dwarf2_per_objfile
*dwarf2_per_objfile
7104 = cu
->per_cu
->dwarf2_per_objfile
;
7107 && dwarf2_per_objfile
->using_index
)
7109 /* We're in a DWO/DWP file, and we're using .gdb_index.
7110 These cases require special processing. */
7111 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7112 return lookup_dwo_signatured_type (cu
, sig
);
7114 return lookup_dwp_signatured_type (cu
, sig
);
7118 struct signatured_type find_entry
, *entry
;
7120 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7122 find_entry
.signature
= sig
;
7123 entry
= ((struct signatured_type
*)
7124 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7129 /* Low level DIE reading support. */
7131 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7134 init_cu_die_reader (struct die_reader_specs
*reader
,
7135 struct dwarf2_cu
*cu
,
7136 struct dwarf2_section_info
*section
,
7137 struct dwo_file
*dwo_file
,
7138 struct abbrev_table
*abbrev_table
)
7140 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7141 reader
->abfd
= get_section_bfd_owner (section
);
7143 reader
->dwo_file
= dwo_file
;
7144 reader
->die_section
= section
;
7145 reader
->buffer
= section
->buffer
;
7146 reader
->buffer_end
= section
->buffer
+ section
->size
;
7147 reader
->comp_dir
= NULL
;
7148 reader
->abbrev_table
= abbrev_table
;
7151 /* Subroutine of init_cutu_and_read_dies to simplify it.
7152 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7153 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7156 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7157 from it to the DIE in the DWO. If NULL we are skipping the stub.
7158 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7159 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7160 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7161 STUB_COMP_DIR may be non-NULL.
7162 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7163 are filled in with the info of the DIE from the DWO file.
7164 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7165 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7166 kept around for at least as long as *RESULT_READER.
7168 The result is non-zero if a valid (non-dummy) DIE was found. */
7171 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7172 struct dwo_unit
*dwo_unit
,
7173 struct die_info
*stub_comp_unit_die
,
7174 const char *stub_comp_dir
,
7175 struct die_reader_specs
*result_reader
,
7176 const gdb_byte
**result_info_ptr
,
7177 struct die_info
**result_comp_unit_die
,
7178 int *result_has_children
,
7179 abbrev_table_up
*result_dwo_abbrev_table
)
7181 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7182 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7183 struct dwarf2_cu
*cu
= this_cu
->cu
;
7185 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7186 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7187 int i
,num_extra_attrs
;
7188 struct dwarf2_section_info
*dwo_abbrev_section
;
7189 struct attribute
*attr
;
7190 struct die_info
*comp_unit_die
;
7192 /* At most one of these may be provided. */
7193 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7195 /* These attributes aren't processed until later:
7196 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7197 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7198 referenced later. However, these attributes are found in the stub
7199 which we won't have later. In order to not impose this complication
7200 on the rest of the code, we read them here and copy them to the
7209 if (stub_comp_unit_die
!= NULL
)
7211 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7213 if (! this_cu
->is_debug_types
)
7214 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7215 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7216 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7217 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7218 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7220 /* There should be a DW_AT_addr_base attribute here (if needed).
7221 We need the value before we can process DW_FORM_GNU_addr_index
7222 or DW_FORM_addrx. */
7224 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7226 cu
->addr_base
= DW_UNSND (attr
);
7228 /* There should be a DW_AT_ranges_base attribute here (if needed).
7229 We need the value before we can process DW_AT_ranges. */
7230 cu
->ranges_base
= 0;
7231 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7233 cu
->ranges_base
= DW_UNSND (attr
);
7235 else if (stub_comp_dir
!= NULL
)
7237 /* Reconstruct the comp_dir attribute to simplify the code below. */
7238 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7239 comp_dir
->name
= DW_AT_comp_dir
;
7240 comp_dir
->form
= DW_FORM_string
;
7241 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7242 DW_STRING (comp_dir
) = stub_comp_dir
;
7245 /* Set up for reading the DWO CU/TU. */
7246 cu
->dwo_unit
= dwo_unit
;
7247 dwarf2_section_info
*section
= dwo_unit
->section
;
7248 dwarf2_read_section (objfile
, section
);
7249 abfd
= get_section_bfd_owner (section
);
7250 begin_info_ptr
= info_ptr
= (section
->buffer
7251 + to_underlying (dwo_unit
->sect_off
));
7252 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7254 if (this_cu
->is_debug_types
)
7256 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7258 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7259 &cu
->header
, section
,
7261 info_ptr
, rcuh_kind::TYPE
);
7262 /* This is not an assert because it can be caused by bad debug info. */
7263 if (sig_type
->signature
!= cu
->header
.signature
)
7265 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7266 " TU at offset %s [in module %s]"),
7267 hex_string (sig_type
->signature
),
7268 hex_string (cu
->header
.signature
),
7269 sect_offset_str (dwo_unit
->sect_off
),
7270 bfd_get_filename (abfd
));
7272 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7273 /* For DWOs coming from DWP files, we don't know the CU length
7274 nor the type's offset in the TU until now. */
7275 dwo_unit
->length
= get_cu_length (&cu
->header
);
7276 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7278 /* Establish the type offset that can be used to lookup the type.
7279 For DWO files, we don't know it until now. */
7280 sig_type
->type_offset_in_section
7281 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7285 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7286 &cu
->header
, section
,
7288 info_ptr
, rcuh_kind::COMPILE
);
7289 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7290 /* For DWOs coming from DWP files, we don't know the CU length
7292 dwo_unit
->length
= get_cu_length (&cu
->header
);
7295 *result_dwo_abbrev_table
7296 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7297 cu
->header
.abbrev_sect_off
);
7298 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7299 result_dwo_abbrev_table
->get ());
7301 /* Read in the die, but leave space to copy over the attributes
7302 from the stub. This has the benefit of simplifying the rest of
7303 the code - all the work to maintain the illusion of a single
7304 DW_TAG_{compile,type}_unit DIE is done here. */
7305 num_extra_attrs
= ((stmt_list
!= NULL
)
7309 + (comp_dir
!= NULL
));
7310 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7311 result_has_children
, num_extra_attrs
);
7313 /* Copy over the attributes from the stub to the DIE we just read in. */
7314 comp_unit_die
= *result_comp_unit_die
;
7315 i
= comp_unit_die
->num_attrs
;
7316 if (stmt_list
!= NULL
)
7317 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7319 comp_unit_die
->attrs
[i
++] = *low_pc
;
7320 if (high_pc
!= NULL
)
7321 comp_unit_die
->attrs
[i
++] = *high_pc
;
7323 comp_unit_die
->attrs
[i
++] = *ranges
;
7324 if (comp_dir
!= NULL
)
7325 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7326 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7328 if (dwarf_die_debug
)
7330 fprintf_unfiltered (gdb_stdlog
,
7331 "Read die from %s@0x%x of %s:\n",
7332 get_section_name (section
),
7333 (unsigned) (begin_info_ptr
- section
->buffer
),
7334 bfd_get_filename (abfd
));
7335 dump_die (comp_unit_die
, dwarf_die_debug
);
7338 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7339 TUs by skipping the stub and going directly to the entry in the DWO file.
7340 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7341 to get it via circuitous means. Blech. */
7342 if (comp_dir
!= NULL
)
7343 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7345 /* Skip dummy compilation units. */
7346 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7347 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7350 *result_info_ptr
= info_ptr
;
7354 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
7355 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
7356 signature is part of the header. */
7357 static gdb::optional
<ULONGEST
>
7358 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
7360 if (cu
->header
.version
>= 5)
7361 return cu
->header
.signature
;
7362 struct attribute
*attr
;
7363 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7364 if (attr
== nullptr)
7365 return gdb::optional
<ULONGEST
> ();
7366 return DW_UNSND (attr
);
7369 /* Subroutine of init_cutu_and_read_dies to simplify it.
7370 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7371 Returns NULL if the specified DWO unit cannot be found. */
7373 static struct dwo_unit
*
7374 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7375 struct die_info
*comp_unit_die
)
7377 struct dwarf2_cu
*cu
= this_cu
->cu
;
7378 struct dwo_unit
*dwo_unit
;
7379 const char *comp_dir
, *dwo_name
;
7381 gdb_assert (cu
!= NULL
);
7383 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7384 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7385 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7387 if (this_cu
->is_debug_types
)
7389 struct signatured_type
*sig_type
;
7391 /* Since this_cu is the first member of struct signatured_type,
7392 we can go from a pointer to one to a pointer to the other. */
7393 sig_type
= (struct signatured_type
*) this_cu
;
7394 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7398 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
7399 if (!signature
.has_value ())
7400 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7402 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7403 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7410 /* Subroutine of init_cutu_and_read_dies to simplify it.
7411 See it for a description of the parameters.
7412 Read a TU directly from a DWO file, bypassing the stub. */
7415 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7416 int use_existing_cu
, int keep
,
7417 die_reader_func_ftype
*die_reader_func
,
7420 std::unique_ptr
<dwarf2_cu
> new_cu
;
7421 struct signatured_type
*sig_type
;
7422 struct die_reader_specs reader
;
7423 const gdb_byte
*info_ptr
;
7424 struct die_info
*comp_unit_die
;
7426 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7428 /* Verify we can do the following downcast, and that we have the
7430 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7431 sig_type
= (struct signatured_type
*) this_cu
;
7432 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7434 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7436 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7437 /* There's no need to do the rereading_dwo_cu handling that
7438 init_cutu_and_read_dies does since we don't read the stub. */
7442 /* If !use_existing_cu, this_cu->cu must be NULL. */
7443 gdb_assert (this_cu
->cu
== NULL
);
7444 new_cu
.reset (new dwarf2_cu (this_cu
));
7447 /* A future optimization, if needed, would be to use an existing
7448 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7449 could share abbrev tables. */
7451 /* The abbreviation table used by READER, this must live at least as long as
7453 abbrev_table_up dwo_abbrev_table
;
7455 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7456 NULL
/* stub_comp_unit_die */,
7457 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7459 &comp_unit_die
, &has_children
,
7460 &dwo_abbrev_table
) == 0)
7466 /* All the "real" work is done here. */
7467 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7469 /* This duplicates the code in init_cutu_and_read_dies,
7470 but the alternative is making the latter more complex.
7471 This function is only for the special case of using DWO files directly:
7472 no point in overly complicating the general case just to handle this. */
7473 if (new_cu
!= NULL
&& keep
)
7475 /* Link this CU into read_in_chain. */
7476 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7477 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7478 /* The chain owns it now. */
7483 /* Initialize a CU (or TU) and read its DIEs.
7484 If the CU defers to a DWO file, read the DWO file as well.
7486 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7487 Otherwise the table specified in the comp unit header is read in and used.
7488 This is an optimization for when we already have the abbrev table.
7490 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7491 Otherwise, a new CU is allocated with xmalloc.
7493 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7494 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7496 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7497 linker) then DIE_READER_FUNC will not get called. */
7500 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7501 struct abbrev_table
*abbrev_table
,
7502 int use_existing_cu
, int keep
,
7504 die_reader_func_ftype
*die_reader_func
,
7507 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7508 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7509 struct dwarf2_section_info
*section
= this_cu
->section
;
7510 bfd
*abfd
= get_section_bfd_owner (section
);
7511 struct dwarf2_cu
*cu
;
7512 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7513 struct die_reader_specs reader
;
7514 struct die_info
*comp_unit_die
;
7516 struct signatured_type
*sig_type
= NULL
;
7517 struct dwarf2_section_info
*abbrev_section
;
7518 /* Non-zero if CU currently points to a DWO file and we need to
7519 reread it. When this happens we need to reread the skeleton die
7520 before we can reread the DWO file (this only applies to CUs, not TUs). */
7521 int rereading_dwo_cu
= 0;
7523 if (dwarf_die_debug
)
7524 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7525 this_cu
->is_debug_types
? "type" : "comp",
7526 sect_offset_str (this_cu
->sect_off
));
7528 if (use_existing_cu
)
7531 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7532 file (instead of going through the stub), short-circuit all of this. */
7533 if (this_cu
->reading_dwo_directly
)
7535 /* Narrow down the scope of possibilities to have to understand. */
7536 gdb_assert (this_cu
->is_debug_types
);
7537 gdb_assert (abbrev_table
== NULL
);
7538 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7539 die_reader_func
, data
);
7543 /* This is cheap if the section is already read in. */
7544 dwarf2_read_section (objfile
, section
);
7546 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7548 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7550 std::unique_ptr
<dwarf2_cu
> new_cu
;
7551 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7554 /* If this CU is from a DWO file we need to start over, we need to
7555 refetch the attributes from the skeleton CU.
7556 This could be optimized by retrieving those attributes from when we
7557 were here the first time: the previous comp_unit_die was stored in
7558 comp_unit_obstack. But there's no data yet that we need this
7560 if (cu
->dwo_unit
!= NULL
)
7561 rereading_dwo_cu
= 1;
7565 /* If !use_existing_cu, this_cu->cu must be NULL. */
7566 gdb_assert (this_cu
->cu
== NULL
);
7567 new_cu
.reset (new dwarf2_cu (this_cu
));
7571 /* Get the header. */
7572 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7574 /* We already have the header, there's no need to read it in again. */
7575 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7579 if (this_cu
->is_debug_types
)
7581 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7582 &cu
->header
, section
,
7583 abbrev_section
, info_ptr
,
7586 /* Since per_cu is the first member of struct signatured_type,
7587 we can go from a pointer to one to a pointer to the other. */
7588 sig_type
= (struct signatured_type
*) this_cu
;
7589 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7590 gdb_assert (sig_type
->type_offset_in_tu
7591 == cu
->header
.type_cu_offset_in_tu
);
7592 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7594 /* LENGTH has not been set yet for type units if we're
7595 using .gdb_index. */
7596 this_cu
->length
= get_cu_length (&cu
->header
);
7598 /* Establish the type offset that can be used to lookup the type. */
7599 sig_type
->type_offset_in_section
=
7600 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7602 this_cu
->dwarf_version
= cu
->header
.version
;
7606 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7607 &cu
->header
, section
,
7610 rcuh_kind::COMPILE
);
7612 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7613 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7614 this_cu
->dwarf_version
= cu
->header
.version
;
7618 /* Skip dummy compilation units. */
7619 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7620 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7623 /* If we don't have them yet, read the abbrevs for this compilation unit.
7624 And if we need to read them now, make sure they're freed when we're
7625 done (own the table through ABBREV_TABLE_HOLDER). */
7626 abbrev_table_up abbrev_table_holder
;
7627 if (abbrev_table
!= NULL
)
7628 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7632 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7633 cu
->header
.abbrev_sect_off
);
7634 abbrev_table
= abbrev_table_holder
.get ();
7637 /* Read the top level CU/TU die. */
7638 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7639 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7641 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7644 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7645 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7646 table from the DWO file and pass the ownership over to us. It will be
7647 referenced from READER, so we must make sure to free it after we're done
7650 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7651 DWO CU, that this test will fail (the attribute will not be present). */
7652 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7653 abbrev_table_up dwo_abbrev_table
;
7654 if (dwo_name
!= nullptr)
7656 struct dwo_unit
*dwo_unit
;
7657 struct die_info
*dwo_comp_unit_die
;
7661 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7662 " has children (offset %s) [in module %s]"),
7663 sect_offset_str (this_cu
->sect_off
),
7664 bfd_get_filename (abfd
));
7666 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7667 if (dwo_unit
!= NULL
)
7669 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7670 comp_unit_die
, NULL
,
7672 &dwo_comp_unit_die
, &has_children
,
7673 &dwo_abbrev_table
) == 0)
7678 comp_unit_die
= dwo_comp_unit_die
;
7682 /* Yikes, we couldn't find the rest of the DIE, we only have
7683 the stub. A complaint has already been logged. There's
7684 not much more we can do except pass on the stub DIE to
7685 die_reader_func. We don't want to throw an error on bad
7690 /* All of the above is setup for this call. Yikes. */
7691 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7693 /* Done, clean up. */
7694 if (new_cu
!= NULL
&& keep
)
7696 /* Link this CU into read_in_chain. */
7697 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7698 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7699 /* The chain owns it now. */
7704 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7705 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7706 to have already done the lookup to find the DWO file).
7708 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7709 THIS_CU->is_debug_types, but nothing else.
7711 We fill in THIS_CU->length.
7713 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7714 linker) then DIE_READER_FUNC will not get called.
7716 THIS_CU->cu is always freed when done.
7717 This is done in order to not leave THIS_CU->cu in a state where we have
7718 to care whether it refers to the "main" CU or the DWO CU. */
7721 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7722 struct dwo_file
*dwo_file
,
7723 die_reader_func_ftype
*die_reader_func
,
7726 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7727 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7728 struct dwarf2_section_info
*section
= this_cu
->section
;
7729 bfd
*abfd
= get_section_bfd_owner (section
);
7730 struct dwarf2_section_info
*abbrev_section
;
7731 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7732 struct die_reader_specs reader
;
7733 struct die_info
*comp_unit_die
;
7736 if (dwarf_die_debug
)
7737 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7738 this_cu
->is_debug_types
? "type" : "comp",
7739 sect_offset_str (this_cu
->sect_off
));
7741 gdb_assert (this_cu
->cu
== NULL
);
7743 abbrev_section
= (dwo_file
!= NULL
7744 ? &dwo_file
->sections
.abbrev
7745 : get_abbrev_section_for_cu (this_cu
));
7747 /* This is cheap if the section is already read in. */
7748 dwarf2_read_section (objfile
, section
);
7750 struct dwarf2_cu
cu (this_cu
);
7752 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7753 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7754 &cu
.header
, section
,
7755 abbrev_section
, info_ptr
,
7756 (this_cu
->is_debug_types
7758 : rcuh_kind::COMPILE
));
7760 this_cu
->length
= get_cu_length (&cu
.header
);
7762 /* Skip dummy compilation units. */
7763 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7764 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7767 abbrev_table_up abbrev_table
7768 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7769 cu
.header
.abbrev_sect_off
);
7771 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7772 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7774 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7777 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7778 does not lookup the specified DWO file.
7779 This cannot be used to read DWO files.
7781 THIS_CU->cu is always freed when done.
7782 This is done in order to not leave THIS_CU->cu in a state where we have
7783 to care whether it refers to the "main" CU or the DWO CU.
7784 We can revisit this if the data shows there's a performance issue. */
7787 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7788 die_reader_func_ftype
*die_reader_func
,
7791 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7794 /* Type Unit Groups.
7796 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7797 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7798 so that all types coming from the same compilation (.o file) are grouped
7799 together. A future step could be to put the types in the same symtab as
7800 the CU the types ultimately came from. */
7803 hash_type_unit_group (const void *item
)
7805 const struct type_unit_group
*tu_group
7806 = (const struct type_unit_group
*) item
;
7808 return hash_stmt_list_entry (&tu_group
->hash
);
7812 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7814 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7815 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7817 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7820 /* Allocate a hash table for type unit groups. */
7823 allocate_type_unit_groups_table (struct objfile
*objfile
)
7825 return htab_create_alloc_ex (3,
7826 hash_type_unit_group
,
7829 &objfile
->objfile_obstack
,
7830 hashtab_obstack_allocate
,
7831 dummy_obstack_deallocate
);
7834 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7835 partial symtabs. We combine several TUs per psymtab to not let the size
7836 of any one psymtab grow too big. */
7837 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7838 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7840 /* Helper routine for get_type_unit_group.
7841 Create the type_unit_group object used to hold one or more TUs. */
7843 static struct type_unit_group
*
7844 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7846 struct dwarf2_per_objfile
*dwarf2_per_objfile
7847 = cu
->per_cu
->dwarf2_per_objfile
;
7848 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7849 struct dwarf2_per_cu_data
*per_cu
;
7850 struct type_unit_group
*tu_group
;
7852 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7853 struct type_unit_group
);
7854 per_cu
= &tu_group
->per_cu
;
7855 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7857 if (dwarf2_per_objfile
->using_index
)
7859 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7860 struct dwarf2_per_cu_quick_data
);
7864 unsigned int line_offset
= to_underlying (line_offset_struct
);
7865 struct partial_symtab
*pst
;
7868 /* Give the symtab a useful name for debug purposes. */
7869 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7870 name
= string_printf ("<type_units_%d>",
7871 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7873 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7875 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7879 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7880 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7885 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7886 STMT_LIST is a DW_AT_stmt_list attribute. */
7888 static struct type_unit_group
*
7889 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7891 struct dwarf2_per_objfile
*dwarf2_per_objfile
7892 = cu
->per_cu
->dwarf2_per_objfile
;
7893 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7894 struct type_unit_group
*tu_group
;
7896 unsigned int line_offset
;
7897 struct type_unit_group type_unit_group_for_lookup
;
7899 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7901 dwarf2_per_objfile
->type_unit_groups
=
7902 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7905 /* Do we need to create a new group, or can we use an existing one? */
7909 line_offset
= DW_UNSND (stmt_list
);
7910 ++tu_stats
->nr_symtab_sharers
;
7914 /* Ugh, no stmt_list. Rare, but we have to handle it.
7915 We can do various things here like create one group per TU or
7916 spread them over multiple groups to split up the expansion work.
7917 To avoid worst case scenarios (too many groups or too large groups)
7918 we, umm, group them in bunches. */
7919 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7920 | (tu_stats
->nr_stmt_less_type_units
7921 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7922 ++tu_stats
->nr_stmt_less_type_units
;
7925 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7926 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7927 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7928 &type_unit_group_for_lookup
, INSERT
);
7931 tu_group
= (struct type_unit_group
*) *slot
;
7932 gdb_assert (tu_group
!= NULL
);
7936 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7937 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7939 ++tu_stats
->nr_symtabs
;
7945 /* Partial symbol tables. */
7947 /* Create a psymtab named NAME and assign it to PER_CU.
7949 The caller must fill in the following details:
7950 dirname, textlow, texthigh. */
7952 static struct partial_symtab
*
7953 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7955 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7956 struct partial_symtab
*pst
;
7958 pst
= start_psymtab_common (objfile
, name
, 0);
7960 pst
->psymtabs_addrmap_supported
= 1;
7962 /* This is the glue that links PST into GDB's symbol API. */
7963 pst
->read_symtab_private
= per_cu
;
7964 pst
->read_symtab
= dwarf2_read_symtab
;
7965 per_cu
->v
.psymtab
= pst
;
7970 /* The DATA object passed to process_psymtab_comp_unit_reader has this
7973 struct process_psymtab_comp_unit_data
7975 /* True if we are reading a DW_TAG_partial_unit. */
7977 int want_partial_unit
;
7979 /* The "pretend" language that is used if the CU doesn't declare a
7982 enum language pretend_language
;
7985 /* die_reader_func for process_psymtab_comp_unit. */
7988 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7989 const gdb_byte
*info_ptr
,
7990 struct die_info
*comp_unit_die
,
7994 struct dwarf2_cu
*cu
= reader
->cu
;
7995 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7996 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7997 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7999 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
8000 struct partial_symtab
*pst
;
8001 enum pc_bounds_kind cu_bounds_kind
;
8002 const char *filename
;
8003 struct process_psymtab_comp_unit_data
*info
8004 = (struct process_psymtab_comp_unit_data
*) data
;
8006 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
8009 gdb_assert (! per_cu
->is_debug_types
);
8011 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
8013 /* Allocate a new partial symbol table structure. */
8014 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
8015 if (filename
== NULL
)
8018 pst
= create_partial_symtab (per_cu
, filename
);
8020 /* This must be done before calling dwarf2_build_include_psymtabs. */
8021 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
8023 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8025 dwarf2_find_base_address (comp_unit_die
, cu
);
8027 /* Possibly set the default values of LOWPC and HIGHPC from
8029 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
8030 &best_highpc
, cu
, pst
);
8031 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
8034 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
8037 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
8039 /* Store the contiguous range if it is not empty; it can be
8040 empty for CUs with no code. */
8041 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8045 /* Check if comp unit has_children.
8046 If so, read the rest of the partial symbols from this comp unit.
8047 If not, there's no more debug_info for this comp unit. */
8050 struct partial_die_info
*first_die
;
8051 CORE_ADDR lowpc
, highpc
;
8053 lowpc
= ((CORE_ADDR
) -1);
8054 highpc
= ((CORE_ADDR
) 0);
8056 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8058 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
8059 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
8061 /* If we didn't find a lowpc, set it to highpc to avoid
8062 complaints from `maint check'. */
8063 if (lowpc
== ((CORE_ADDR
) -1))
8066 /* If the compilation unit didn't have an explicit address range,
8067 then use the information extracted from its child dies. */
8068 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
8071 best_highpc
= highpc
;
8074 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
8075 best_lowpc
+ baseaddr
)
8077 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
8078 best_highpc
+ baseaddr
)
8081 end_psymtab_common (objfile
, pst
);
8083 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
8086 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8087 struct dwarf2_per_cu_data
*iter
;
8089 /* Fill in 'dependencies' here; we fill in 'users' in a
8091 pst
->number_of_dependencies
= len
;
8093 = objfile
->partial_symtabs
->allocate_dependencies (len
);
8095 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8098 pst
->dependencies
[i
] = iter
->v
.psymtab
;
8100 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8103 /* Get the list of files included in the current compilation unit,
8104 and build a psymtab for each of them. */
8105 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8107 if (dwarf_read_debug
)
8108 fprintf_unfiltered (gdb_stdlog
,
8109 "Psymtab for %s unit @%s: %s - %s"
8110 ", %d global, %d static syms\n",
8111 per_cu
->is_debug_types
? "type" : "comp",
8112 sect_offset_str (per_cu
->sect_off
),
8113 paddress (gdbarch
, pst
->text_low (objfile
)),
8114 paddress (gdbarch
, pst
->text_high (objfile
)),
8115 pst
->n_global_syms
, pst
->n_static_syms
);
8118 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8119 Process compilation unit THIS_CU for a psymtab. */
8122 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8123 int want_partial_unit
,
8124 enum language pretend_language
)
8126 /* If this compilation unit was already read in, free the
8127 cached copy in order to read it in again. This is
8128 necessary because we skipped some symbols when we first
8129 read in the compilation unit (see load_partial_dies).
8130 This problem could be avoided, but the benefit is unclear. */
8131 if (this_cu
->cu
!= NULL
)
8132 free_one_cached_comp_unit (this_cu
);
8134 if (this_cu
->is_debug_types
)
8135 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8136 build_type_psymtabs_reader
, NULL
);
8139 process_psymtab_comp_unit_data info
;
8140 info
.want_partial_unit
= want_partial_unit
;
8141 info
.pretend_language
= pretend_language
;
8142 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8143 process_psymtab_comp_unit_reader
, &info
);
8146 /* Age out any secondary CUs. */
8147 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8150 /* Reader function for build_type_psymtabs. */
8153 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8154 const gdb_byte
*info_ptr
,
8155 struct die_info
*type_unit_die
,
8159 struct dwarf2_per_objfile
*dwarf2_per_objfile
8160 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8161 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8162 struct dwarf2_cu
*cu
= reader
->cu
;
8163 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8164 struct signatured_type
*sig_type
;
8165 struct type_unit_group
*tu_group
;
8166 struct attribute
*attr
;
8167 struct partial_die_info
*first_die
;
8168 CORE_ADDR lowpc
, highpc
;
8169 struct partial_symtab
*pst
;
8171 gdb_assert (data
== NULL
);
8172 gdb_assert (per_cu
->is_debug_types
);
8173 sig_type
= (struct signatured_type
*) per_cu
;
8178 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8179 tu_group
= get_type_unit_group (cu
, attr
);
8181 if (tu_group
->tus
== nullptr)
8182 tu_group
->tus
= new std::vector
<signatured_type
*>;
8183 tu_group
->tus
->push_back (sig_type
);
8185 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8186 pst
= create_partial_symtab (per_cu
, "");
8189 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8191 lowpc
= (CORE_ADDR
) -1;
8192 highpc
= (CORE_ADDR
) 0;
8193 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8195 end_psymtab_common (objfile
, pst
);
8198 /* Struct used to sort TUs by their abbreviation table offset. */
8200 struct tu_abbrev_offset
8202 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
8203 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
8206 signatured_type
*sig_type
;
8207 sect_offset abbrev_offset
;
8210 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8213 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8214 const struct tu_abbrev_offset
&b
)
8216 return a
.abbrev_offset
< b
.abbrev_offset
;
8219 /* Efficiently read all the type units.
8220 This does the bulk of the work for build_type_psymtabs.
8222 The efficiency is because we sort TUs by the abbrev table they use and
8223 only read each abbrev table once. In one program there are 200K TUs
8224 sharing 8K abbrev tables.
8226 The main purpose of this function is to support building the
8227 dwarf2_per_objfile->type_unit_groups table.
8228 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8229 can collapse the search space by grouping them by stmt_list.
8230 The savings can be significant, in the same program from above the 200K TUs
8231 share 8K stmt_list tables.
8233 FUNC is expected to call get_type_unit_group, which will create the
8234 struct type_unit_group if necessary and add it to
8235 dwarf2_per_objfile->type_unit_groups. */
8238 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8240 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8241 abbrev_table_up abbrev_table
;
8242 sect_offset abbrev_offset
;
8244 /* It's up to the caller to not call us multiple times. */
8245 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8247 if (dwarf2_per_objfile
->all_type_units
.empty ())
8250 /* TUs typically share abbrev tables, and there can be way more TUs than
8251 abbrev tables. Sort by abbrev table to reduce the number of times we
8252 read each abbrev table in.
8253 Alternatives are to punt or to maintain a cache of abbrev tables.
8254 This is simpler and efficient enough for now.
8256 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8257 symtab to use). Typically TUs with the same abbrev offset have the same
8258 stmt_list value too so in practice this should work well.
8260 The basic algorithm here is:
8262 sort TUs by abbrev table
8263 for each TU with same abbrev table:
8264 read abbrev table if first user
8265 read TU top level DIE
8266 [IWBN if DWO skeletons had DW_AT_stmt_list]
8269 if (dwarf_read_debug
)
8270 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8272 /* Sort in a separate table to maintain the order of all_type_units
8273 for .gdb_index: TU indices directly index all_type_units. */
8274 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
8275 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
8277 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
8278 sorted_by_abbrev
.emplace_back
8279 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
8280 sig_type
->per_cu
.section
,
8281 sig_type
->per_cu
.sect_off
));
8283 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8284 sort_tu_by_abbrev_offset
);
8286 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8288 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
8290 /* Switch to the next abbrev table if necessary. */
8291 if (abbrev_table
== NULL
8292 || tu
.abbrev_offset
!= abbrev_offset
)
8294 abbrev_offset
= tu
.abbrev_offset
;
8296 abbrev_table_read_table (dwarf2_per_objfile
,
8297 &dwarf2_per_objfile
->abbrev
,
8299 ++tu_stats
->nr_uniq_abbrev_tables
;
8302 init_cutu_and_read_dies (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
8303 0, 0, false, build_type_psymtabs_reader
, NULL
);
8307 /* Print collected type unit statistics. */
8310 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8312 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8314 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8315 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8316 dwarf2_per_objfile
->all_type_units
.size ());
8317 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8318 tu_stats
->nr_uniq_abbrev_tables
);
8319 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8320 tu_stats
->nr_symtabs
);
8321 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8322 tu_stats
->nr_symtab_sharers
);
8323 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8324 tu_stats
->nr_stmt_less_type_units
);
8325 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8326 tu_stats
->nr_all_type_units_reallocs
);
8329 /* Traversal function for build_type_psymtabs. */
8332 build_type_psymtab_dependencies (void **slot
, void *info
)
8334 struct dwarf2_per_objfile
*dwarf2_per_objfile
8335 = (struct dwarf2_per_objfile
*) info
;
8336 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8337 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8338 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8339 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8340 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
8343 gdb_assert (len
> 0);
8344 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8346 pst
->number_of_dependencies
= len
;
8347 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
8348 for (i
= 0; i
< len
; ++i
)
8350 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
8351 gdb_assert (iter
->per_cu
.is_debug_types
);
8352 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8353 iter
->type_unit_group
= tu_group
;
8356 delete tu_group
->tus
;
8357 tu_group
->tus
= nullptr;
8362 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8363 Build partial symbol tables for the .debug_types comp-units. */
8366 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8368 if (! create_all_type_units (dwarf2_per_objfile
))
8371 build_type_psymtabs_1 (dwarf2_per_objfile
);
8374 /* Traversal function for process_skeletonless_type_unit.
8375 Read a TU in a DWO file and build partial symbols for it. */
8378 process_skeletonless_type_unit (void **slot
, void *info
)
8380 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8381 struct dwarf2_per_objfile
*dwarf2_per_objfile
8382 = (struct dwarf2_per_objfile
*) info
;
8383 struct signatured_type find_entry
, *entry
;
8385 /* If this TU doesn't exist in the global table, add it and read it in. */
8387 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8389 dwarf2_per_objfile
->signatured_types
8390 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8393 find_entry
.signature
= dwo_unit
->signature
;
8394 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8396 /* If we've already seen this type there's nothing to do. What's happening
8397 is we're doing our own version of comdat-folding here. */
8401 /* This does the job that create_all_type_units would have done for
8403 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8404 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8407 /* This does the job that build_type_psymtabs_1 would have done. */
8408 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0, false,
8409 build_type_psymtabs_reader
, NULL
);
8414 /* Traversal function for process_skeletonless_type_units. */
8417 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8419 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8421 if (dwo_file
->tus
!= NULL
)
8423 htab_traverse_noresize (dwo_file
->tus
,
8424 process_skeletonless_type_unit
, info
);
8430 /* Scan all TUs of DWO files, verifying we've processed them.
8431 This is needed in case a TU was emitted without its skeleton.
8432 Note: This can't be done until we know what all the DWO files are. */
8435 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8437 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8438 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8439 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8441 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
8442 process_dwo_file_for_skeletonless_type_units
,
8443 dwarf2_per_objfile
);
8447 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8450 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8452 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8454 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8459 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8461 /* Set the 'user' field only if it is not already set. */
8462 if (pst
->dependencies
[j
]->user
== NULL
)
8463 pst
->dependencies
[j
]->user
= pst
;
8468 /* Build the partial symbol table by doing a quick pass through the
8469 .debug_info and .debug_abbrev sections. */
8472 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8474 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8476 if (dwarf_read_debug
)
8478 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8479 objfile_name (objfile
));
8482 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8484 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8486 /* Any cached compilation units will be linked by the per-objfile
8487 read_in_chain. Make sure to free them when we're done. */
8488 free_cached_comp_units
freer (dwarf2_per_objfile
);
8490 build_type_psymtabs (dwarf2_per_objfile
);
8492 create_all_comp_units (dwarf2_per_objfile
);
8494 /* Create a temporary address map on a temporary obstack. We later
8495 copy this to the final obstack. */
8496 auto_obstack temp_obstack
;
8498 scoped_restore save_psymtabs_addrmap
8499 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
8500 addrmap_create_mutable (&temp_obstack
));
8502 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8503 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8505 /* This has to wait until we read the CUs, we need the list of DWOs. */
8506 process_skeletonless_type_units (dwarf2_per_objfile
);
8508 /* Now that all TUs have been processed we can fill in the dependencies. */
8509 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8511 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8512 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8515 if (dwarf_read_debug
)
8516 print_tu_stats (dwarf2_per_objfile
);
8518 set_partial_user (dwarf2_per_objfile
);
8520 objfile
->partial_symtabs
->psymtabs_addrmap
8521 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
8522 objfile
->partial_symtabs
->obstack ());
8523 /* At this point we want to keep the address map. */
8524 save_psymtabs_addrmap
.release ();
8526 if (dwarf_read_debug
)
8527 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8528 objfile_name (objfile
));
8531 /* die_reader_func for load_partial_comp_unit. */
8534 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8535 const gdb_byte
*info_ptr
,
8536 struct die_info
*comp_unit_die
,
8540 struct dwarf2_cu
*cu
= reader
->cu
;
8542 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8544 /* Check if comp unit has_children.
8545 If so, read the rest of the partial symbols from this comp unit.
8546 If not, there's no more debug_info for this comp unit. */
8548 load_partial_dies (reader
, info_ptr
, 0);
8551 /* Load the partial DIEs for a secondary CU into memory.
8552 This is also used when rereading a primary CU with load_all_dies. */
8555 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8557 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, false,
8558 load_partial_comp_unit_reader
, NULL
);
8562 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8563 struct dwarf2_section_info
*section
,
8564 struct dwarf2_section_info
*abbrev_section
,
8565 unsigned int is_dwz
)
8567 const gdb_byte
*info_ptr
;
8568 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8570 if (dwarf_read_debug
)
8571 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8572 get_section_name (section
),
8573 get_section_file_name (section
));
8575 dwarf2_read_section (objfile
, section
);
8577 info_ptr
= section
->buffer
;
8579 while (info_ptr
< section
->buffer
+ section
->size
)
8581 struct dwarf2_per_cu_data
*this_cu
;
8583 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8585 comp_unit_head cu_header
;
8586 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8587 abbrev_section
, info_ptr
,
8588 rcuh_kind::COMPILE
);
8590 /* Save the compilation unit for later lookup. */
8591 if (cu_header
.unit_type
!= DW_UT_type
)
8593 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8594 struct dwarf2_per_cu_data
);
8595 memset (this_cu
, 0, sizeof (*this_cu
));
8599 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8600 struct signatured_type
);
8601 memset (sig_type
, 0, sizeof (*sig_type
));
8602 sig_type
->signature
= cu_header
.signature
;
8603 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8604 this_cu
= &sig_type
->per_cu
;
8606 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8607 this_cu
->sect_off
= sect_off
;
8608 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8609 this_cu
->is_dwz
= is_dwz
;
8610 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8611 this_cu
->section
= section
;
8613 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8615 info_ptr
= info_ptr
+ this_cu
->length
;
8619 /* Create a list of all compilation units in OBJFILE.
8620 This is only done for -readnow and building partial symtabs. */
8623 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8625 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8626 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8627 &dwarf2_per_objfile
->abbrev
, 0);
8629 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8631 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8635 /* Process all loaded DIEs for compilation unit CU, starting at
8636 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8637 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8638 DW_AT_ranges). See the comments of add_partial_subprogram on how
8639 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8642 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8643 CORE_ADDR
*highpc
, int set_addrmap
,
8644 struct dwarf2_cu
*cu
)
8646 struct partial_die_info
*pdi
;
8648 /* Now, march along the PDI's, descending into ones which have
8649 interesting children but skipping the children of the other ones,
8650 until we reach the end of the compilation unit. */
8658 /* Anonymous namespaces or modules have no name but have interesting
8659 children, so we need to look at them. Ditto for anonymous
8662 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8663 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8664 || pdi
->tag
== DW_TAG_imported_unit
8665 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8669 case DW_TAG_subprogram
:
8670 case DW_TAG_inlined_subroutine
:
8671 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8673 case DW_TAG_constant
:
8674 case DW_TAG_variable
:
8675 case DW_TAG_typedef
:
8676 case DW_TAG_union_type
:
8677 if (!pdi
->is_declaration
)
8679 add_partial_symbol (pdi
, cu
);
8682 case DW_TAG_class_type
:
8683 case DW_TAG_interface_type
:
8684 case DW_TAG_structure_type
:
8685 if (!pdi
->is_declaration
)
8687 add_partial_symbol (pdi
, cu
);
8689 if ((cu
->language
== language_rust
8690 || cu
->language
== language_cplus
) && pdi
->has_children
)
8691 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8694 case DW_TAG_enumeration_type
:
8695 if (!pdi
->is_declaration
)
8696 add_partial_enumeration (pdi
, cu
);
8698 case DW_TAG_base_type
:
8699 case DW_TAG_subrange_type
:
8700 /* File scope base type definitions are added to the partial
8702 add_partial_symbol (pdi
, cu
);
8704 case DW_TAG_namespace
:
8705 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8708 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8710 case DW_TAG_imported_unit
:
8712 struct dwarf2_per_cu_data
*per_cu
;
8714 /* For now we don't handle imported units in type units. */
8715 if (cu
->per_cu
->is_debug_types
)
8717 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8718 " supported in type units [in module %s]"),
8719 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8722 per_cu
= dwarf2_find_containing_comp_unit
8723 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8724 cu
->per_cu
->dwarf2_per_objfile
);
8726 /* Go read the partial unit, if needed. */
8727 if (per_cu
->v
.psymtab
== NULL
)
8728 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8730 VEC_safe_push (dwarf2_per_cu_ptr
,
8731 cu
->per_cu
->imported_symtabs
, per_cu
);
8734 case DW_TAG_imported_declaration
:
8735 add_partial_symbol (pdi
, cu
);
8742 /* If the die has a sibling, skip to the sibling. */
8744 pdi
= pdi
->die_sibling
;
8748 /* Functions used to compute the fully scoped name of a partial DIE.
8750 Normally, this is simple. For C++, the parent DIE's fully scoped
8751 name is concatenated with "::" and the partial DIE's name.
8752 Enumerators are an exception; they use the scope of their parent
8753 enumeration type, i.e. the name of the enumeration type is not
8754 prepended to the enumerator.
8756 There are two complexities. One is DW_AT_specification; in this
8757 case "parent" means the parent of the target of the specification,
8758 instead of the direct parent of the DIE. The other is compilers
8759 which do not emit DW_TAG_namespace; in this case we try to guess
8760 the fully qualified name of structure types from their members'
8761 linkage names. This must be done using the DIE's children rather
8762 than the children of any DW_AT_specification target. We only need
8763 to do this for structures at the top level, i.e. if the target of
8764 any DW_AT_specification (if any; otherwise the DIE itself) does not
8767 /* Compute the scope prefix associated with PDI's parent, in
8768 compilation unit CU. The result will be allocated on CU's
8769 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8770 field. NULL is returned if no prefix is necessary. */
8772 partial_die_parent_scope (struct partial_die_info
*pdi
,
8773 struct dwarf2_cu
*cu
)
8775 const char *grandparent_scope
;
8776 struct partial_die_info
*parent
, *real_pdi
;
8778 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8779 then this means the parent of the specification DIE. */
8782 while (real_pdi
->has_specification
)
8784 auto res
= find_partial_die (real_pdi
->spec_offset
,
8785 real_pdi
->spec_is_dwz
, cu
);
8790 parent
= real_pdi
->die_parent
;
8794 if (parent
->scope_set
)
8795 return parent
->scope
;
8799 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8801 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8802 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8803 Work around this problem here. */
8804 if (cu
->language
== language_cplus
8805 && parent
->tag
== DW_TAG_namespace
8806 && strcmp (parent
->name
, "::") == 0
8807 && grandparent_scope
== NULL
)
8809 parent
->scope
= NULL
;
8810 parent
->scope_set
= 1;
8814 /* Nested subroutines in Fortran get a prefix. */
8815 if (pdi
->tag
== DW_TAG_enumerator
)
8816 /* Enumerators should not get the name of the enumeration as a prefix. */
8817 parent
->scope
= grandparent_scope
;
8818 else if (parent
->tag
== DW_TAG_namespace
8819 || parent
->tag
== DW_TAG_module
8820 || parent
->tag
== DW_TAG_structure_type
8821 || parent
->tag
== DW_TAG_class_type
8822 || parent
->tag
== DW_TAG_interface_type
8823 || parent
->tag
== DW_TAG_union_type
8824 || parent
->tag
== DW_TAG_enumeration_type
8825 || (cu
->language
== language_fortran
8826 && parent
->tag
== DW_TAG_subprogram
8827 && pdi
->tag
== DW_TAG_subprogram
))
8829 if (grandparent_scope
== NULL
)
8830 parent
->scope
= parent
->name
;
8832 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8834 parent
->name
, 0, cu
);
8838 /* FIXME drow/2004-04-01: What should we be doing with
8839 function-local names? For partial symbols, we should probably be
8841 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8842 dwarf_tag_name (parent
->tag
),
8843 sect_offset_str (pdi
->sect_off
));
8844 parent
->scope
= grandparent_scope
;
8847 parent
->scope_set
= 1;
8848 return parent
->scope
;
8851 /* Return the fully scoped name associated with PDI, from compilation unit
8852 CU. The result will be allocated with malloc. */
8855 partial_die_full_name (struct partial_die_info
*pdi
,
8856 struct dwarf2_cu
*cu
)
8858 const char *parent_scope
;
8860 /* If this is a template instantiation, we can not work out the
8861 template arguments from partial DIEs. So, unfortunately, we have
8862 to go through the full DIEs. At least any work we do building
8863 types here will be reused if full symbols are loaded later. */
8864 if (pdi
->has_template_arguments
)
8868 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8870 struct die_info
*die
;
8871 struct attribute attr
;
8872 struct dwarf2_cu
*ref_cu
= cu
;
8874 /* DW_FORM_ref_addr is using section offset. */
8875 attr
.name
= (enum dwarf_attribute
) 0;
8876 attr
.form
= DW_FORM_ref_addr
;
8877 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8878 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8880 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8884 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8885 if (parent_scope
== NULL
)
8888 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8892 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8894 struct dwarf2_per_objfile
*dwarf2_per_objfile
8895 = cu
->per_cu
->dwarf2_per_objfile
;
8896 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8897 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8899 const char *actual_name
= NULL
;
8901 char *built_actual_name
;
8903 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8905 built_actual_name
= partial_die_full_name (pdi
, cu
);
8906 if (built_actual_name
!= NULL
)
8907 actual_name
= built_actual_name
;
8909 if (actual_name
== NULL
)
8910 actual_name
= pdi
->name
;
8914 case DW_TAG_inlined_subroutine
:
8915 case DW_TAG_subprogram
:
8916 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8918 if (pdi
->is_external
8919 || cu
->language
== language_ada
8920 || (cu
->language
== language_fortran
8921 && pdi
->die_parent
!= NULL
8922 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8924 /* Normally, only "external" DIEs are part of the global scope.
8925 But in Ada and Fortran, we want to be able to access nested
8926 procedures globally. So all Ada and Fortran subprograms are
8927 stored in the global scope. */
8928 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8929 built_actual_name
!= NULL
,
8930 VAR_DOMAIN
, LOC_BLOCK
,
8931 SECT_OFF_TEXT (objfile
),
8932 psymbol_placement::GLOBAL
,
8934 cu
->language
, objfile
);
8938 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8939 built_actual_name
!= NULL
,
8940 VAR_DOMAIN
, LOC_BLOCK
,
8941 SECT_OFF_TEXT (objfile
),
8942 psymbol_placement::STATIC
,
8943 addr
, cu
->language
, objfile
);
8946 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8947 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8949 case DW_TAG_constant
:
8950 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8951 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8952 -1, (pdi
->is_external
8953 ? psymbol_placement::GLOBAL
8954 : psymbol_placement::STATIC
),
8955 0, cu
->language
, objfile
);
8957 case DW_TAG_variable
:
8959 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8963 && !dwarf2_per_objfile
->has_section_at_zero
)
8965 /* A global or static variable may also have been stripped
8966 out by the linker if unused, in which case its address
8967 will be nullified; do not add such variables into partial
8968 symbol table then. */
8970 else if (pdi
->is_external
)
8973 Don't enter into the minimal symbol tables as there is
8974 a minimal symbol table entry from the ELF symbols already.
8975 Enter into partial symbol table if it has a location
8976 descriptor or a type.
8977 If the location descriptor is missing, new_symbol will create
8978 a LOC_UNRESOLVED symbol, the address of the variable will then
8979 be determined from the minimal symbol table whenever the variable
8981 The address for the partial symbol table entry is not
8982 used by GDB, but it comes in handy for debugging partial symbol
8985 if (pdi
->d
.locdesc
|| pdi
->has_type
)
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::GLOBAL
,
8991 addr
, cu
->language
, objfile
);
8995 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8997 /* Static Variable. Skip symbols whose value we cannot know (those
8998 without location descriptors or constant values). */
8999 if (!has_loc
&& !pdi
->has_const_value
)
9001 xfree (built_actual_name
);
9005 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9006 built_actual_name
!= NULL
,
9007 VAR_DOMAIN
, LOC_STATIC
,
9008 SECT_OFF_TEXT (objfile
),
9009 psymbol_placement::STATIC
,
9011 cu
->language
, objfile
);
9014 case DW_TAG_typedef
:
9015 case DW_TAG_base_type
:
9016 case DW_TAG_subrange_type
:
9017 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9018 built_actual_name
!= NULL
,
9019 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
9020 psymbol_placement::STATIC
,
9021 0, cu
->language
, objfile
);
9023 case DW_TAG_imported_declaration
:
9024 case DW_TAG_namespace
:
9025 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9026 built_actual_name
!= NULL
,
9027 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
9028 psymbol_placement::GLOBAL
,
9029 0, cu
->language
, objfile
);
9032 /* With Fortran 77 there might be a "BLOCK DATA" module
9033 available without any name. If so, we skip the module as it
9034 doesn't bring any value. */
9035 if (actual_name
!= nullptr)
9036 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9037 built_actual_name
!= NULL
,
9038 MODULE_DOMAIN
, LOC_TYPEDEF
, -1,
9039 psymbol_placement::GLOBAL
,
9040 0, cu
->language
, objfile
);
9042 case DW_TAG_class_type
:
9043 case DW_TAG_interface_type
:
9044 case DW_TAG_structure_type
:
9045 case DW_TAG_union_type
:
9046 case DW_TAG_enumeration_type
:
9047 /* Skip external references. The DWARF standard says in the section
9048 about "Structure, Union, and Class Type Entries": "An incomplete
9049 structure, union or class type is represented by a structure,
9050 union or class entry that does not have a byte size attribute
9051 and that has a DW_AT_declaration attribute." */
9052 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
9054 xfree (built_actual_name
);
9058 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
9059 static vs. global. */
9060 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9061 built_actual_name
!= NULL
,
9062 STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
9063 cu
->language
== language_cplus
9064 ? psymbol_placement::GLOBAL
9065 : psymbol_placement::STATIC
,
9066 0, cu
->language
, objfile
);
9069 case DW_TAG_enumerator
:
9070 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9071 built_actual_name
!= NULL
,
9072 VAR_DOMAIN
, LOC_CONST
, -1,
9073 cu
->language
== language_cplus
9074 ? psymbol_placement::GLOBAL
9075 : psymbol_placement::STATIC
,
9076 0, cu
->language
, objfile
);
9082 xfree (built_actual_name
);
9085 /* Read a partial die corresponding to a namespace; also, add a symbol
9086 corresponding to that namespace to the symbol table. NAMESPACE is
9087 the name of the enclosing namespace. */
9090 add_partial_namespace (struct partial_die_info
*pdi
,
9091 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9092 int set_addrmap
, struct dwarf2_cu
*cu
)
9094 /* Add a symbol for the namespace. */
9096 add_partial_symbol (pdi
, cu
);
9098 /* Now scan partial symbols in that namespace. */
9100 if (pdi
->has_children
)
9101 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9104 /* Read a partial die corresponding to a Fortran module. */
9107 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
9108 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
9110 /* Add a symbol for the namespace. */
9112 add_partial_symbol (pdi
, cu
);
9114 /* Now scan partial symbols in that module. */
9116 if (pdi
->has_children
)
9117 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9120 /* Read a partial die corresponding to a subprogram or an inlined
9121 subprogram and create a partial symbol for that subprogram.
9122 When the CU language allows it, this routine also defines a partial
9123 symbol for each nested subprogram that this subprogram contains.
9124 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9125 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9127 PDI may also be a lexical block, in which case we simply search
9128 recursively for subprograms defined inside that lexical block.
9129 Again, this is only performed when the CU language allows this
9130 type of definitions. */
9133 add_partial_subprogram (struct partial_die_info
*pdi
,
9134 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9135 int set_addrmap
, struct dwarf2_cu
*cu
)
9137 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9139 if (pdi
->has_pc_info
)
9141 if (pdi
->lowpc
< *lowpc
)
9142 *lowpc
= pdi
->lowpc
;
9143 if (pdi
->highpc
> *highpc
)
9144 *highpc
= pdi
->highpc
;
9147 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9148 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9150 CORE_ADDR this_highpc
;
9151 CORE_ADDR this_lowpc
;
9153 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9154 SECT_OFF_TEXT (objfile
));
9156 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
9157 pdi
->lowpc
+ baseaddr
)
9160 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
9161 pdi
->highpc
+ baseaddr
)
9163 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
9164 this_lowpc
, this_highpc
- 1,
9165 cu
->per_cu
->v
.psymtab
);
9169 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9171 if (!pdi
->is_declaration
)
9172 /* Ignore subprogram DIEs that do not have a name, they are
9173 illegal. Do not emit a complaint at this point, we will
9174 do so when we convert this psymtab into a symtab. */
9176 add_partial_symbol (pdi
, cu
);
9180 if (! pdi
->has_children
)
9183 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
9185 pdi
= pdi
->die_child
;
9189 if (pdi
->tag
== DW_TAG_subprogram
9190 || pdi
->tag
== DW_TAG_inlined_subroutine
9191 || pdi
->tag
== DW_TAG_lexical_block
)
9192 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9193 pdi
= pdi
->die_sibling
;
9198 /* Read a partial die corresponding to an enumeration type. */
9201 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9202 struct dwarf2_cu
*cu
)
9204 struct partial_die_info
*pdi
;
9206 if (enum_pdi
->name
!= NULL
)
9207 add_partial_symbol (enum_pdi
, cu
);
9209 pdi
= enum_pdi
->die_child
;
9212 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9213 complaint (_("malformed enumerator DIE ignored"));
9215 add_partial_symbol (pdi
, cu
);
9216 pdi
= pdi
->die_sibling
;
9220 /* Return the initial uleb128 in the die at INFO_PTR. */
9223 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9225 unsigned int bytes_read
;
9227 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9230 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9231 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9233 Return the corresponding abbrev, or NULL if the number is zero (indicating
9234 an empty DIE). In either case *BYTES_READ will be set to the length of
9235 the initial number. */
9237 static struct abbrev_info
*
9238 peek_die_abbrev (const die_reader_specs
&reader
,
9239 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9241 dwarf2_cu
*cu
= reader
.cu
;
9242 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9243 unsigned int abbrev_number
9244 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9246 if (abbrev_number
== 0)
9249 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9252 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9253 " at offset %s [in module %s]"),
9254 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9255 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9261 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9262 Returns a pointer to the end of a series of DIEs, terminated by an empty
9263 DIE. Any children of the skipped DIEs will also be skipped. */
9265 static const gdb_byte
*
9266 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9270 unsigned int bytes_read
;
9271 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9274 return info_ptr
+ bytes_read
;
9276 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9280 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9281 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9282 abbrev corresponding to that skipped uleb128 should be passed in
9283 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9286 static const gdb_byte
*
9287 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9288 struct abbrev_info
*abbrev
)
9290 unsigned int bytes_read
;
9291 struct attribute attr
;
9292 bfd
*abfd
= reader
->abfd
;
9293 struct dwarf2_cu
*cu
= reader
->cu
;
9294 const gdb_byte
*buffer
= reader
->buffer
;
9295 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9296 unsigned int form
, i
;
9298 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9300 /* The only abbrev we care about is DW_AT_sibling. */
9301 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9303 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9304 if (attr
.form
== DW_FORM_ref_addr
)
9305 complaint (_("ignoring absolute DW_AT_sibling"));
9308 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9309 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9311 if (sibling_ptr
< info_ptr
)
9312 complaint (_("DW_AT_sibling points backwards"));
9313 else if (sibling_ptr
> reader
->buffer_end
)
9314 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9320 /* If it isn't DW_AT_sibling, skip this attribute. */
9321 form
= abbrev
->attrs
[i
].form
;
9325 case DW_FORM_ref_addr
:
9326 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9327 and later it is offset sized. */
9328 if (cu
->header
.version
== 2)
9329 info_ptr
+= cu
->header
.addr_size
;
9331 info_ptr
+= cu
->header
.offset_size
;
9333 case DW_FORM_GNU_ref_alt
:
9334 info_ptr
+= cu
->header
.offset_size
;
9337 info_ptr
+= cu
->header
.addr_size
;
9345 case DW_FORM_flag_present
:
9346 case DW_FORM_implicit_const
:
9363 case DW_FORM_ref_sig8
:
9366 case DW_FORM_data16
:
9369 case DW_FORM_string
:
9370 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9371 info_ptr
+= bytes_read
;
9373 case DW_FORM_sec_offset
:
9375 case DW_FORM_GNU_strp_alt
:
9376 info_ptr
+= cu
->header
.offset_size
;
9378 case DW_FORM_exprloc
:
9380 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9381 info_ptr
+= bytes_read
;
9383 case DW_FORM_block1
:
9384 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9386 case DW_FORM_block2
:
9387 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9389 case DW_FORM_block4
:
9390 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9396 case DW_FORM_ref_udata
:
9397 case DW_FORM_GNU_addr_index
:
9398 case DW_FORM_GNU_str_index
:
9399 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9401 case DW_FORM_indirect
:
9402 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9403 info_ptr
+= bytes_read
;
9404 /* We need to continue parsing from here, so just go back to
9406 goto skip_attribute
;
9409 error (_("Dwarf Error: Cannot handle %s "
9410 "in DWARF reader [in module %s]"),
9411 dwarf_form_name (form
),
9412 bfd_get_filename (abfd
));
9416 if (abbrev
->has_children
)
9417 return skip_children (reader
, info_ptr
);
9422 /* Locate ORIG_PDI's sibling.
9423 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9425 static const gdb_byte
*
9426 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9427 struct partial_die_info
*orig_pdi
,
9428 const gdb_byte
*info_ptr
)
9430 /* Do we know the sibling already? */
9432 if (orig_pdi
->sibling
)
9433 return orig_pdi
->sibling
;
9435 /* Are there any children to deal with? */
9437 if (!orig_pdi
->has_children
)
9440 /* Skip the children the long way. */
9442 return skip_children (reader
, info_ptr
);
9445 /* Expand this partial symbol table into a full symbol table. SELF is
9449 dwarf2_read_symtab (struct partial_symtab
*self
,
9450 struct objfile
*objfile
)
9452 struct dwarf2_per_objfile
*dwarf2_per_objfile
9453 = get_dwarf2_per_objfile (objfile
);
9457 warning (_("bug: psymtab for %s is already read in."),
9464 printf_filtered (_("Reading in symbols for %s..."),
9466 gdb_flush (gdb_stdout
);
9469 /* If this psymtab is constructed from a debug-only objfile, the
9470 has_section_at_zero flag will not necessarily be correct. We
9471 can get the correct value for this flag by looking at the data
9472 associated with the (presumably stripped) associated objfile. */
9473 if (objfile
->separate_debug_objfile_backlink
)
9475 struct dwarf2_per_objfile
*dpo_backlink
9476 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9478 dwarf2_per_objfile
->has_section_at_zero
9479 = dpo_backlink
->has_section_at_zero
;
9482 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9484 psymtab_to_symtab_1 (self
);
9486 /* Finish up the debug error message. */
9488 printf_filtered (_("done.\n"));
9491 process_cu_includes (dwarf2_per_objfile
);
9494 /* Reading in full CUs. */
9496 /* Add PER_CU to the queue. */
9499 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9500 enum language pretend_language
)
9502 struct dwarf2_queue_item
*item
;
9505 item
= XNEW (struct dwarf2_queue_item
);
9506 item
->per_cu
= per_cu
;
9507 item
->pretend_language
= pretend_language
;
9510 if (dwarf2_queue
== NULL
)
9511 dwarf2_queue
= item
;
9513 dwarf2_queue_tail
->next
= item
;
9515 dwarf2_queue_tail
= item
;
9518 /* If PER_CU is not yet queued, add it to the queue.
9519 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9521 The result is non-zero if PER_CU was queued, otherwise the result is zero
9522 meaning either PER_CU is already queued or it is already loaded.
9524 N.B. There is an invariant here that if a CU is queued then it is loaded.
9525 The caller is required to load PER_CU if we return non-zero. */
9528 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9529 struct dwarf2_per_cu_data
*per_cu
,
9530 enum language pretend_language
)
9532 /* We may arrive here during partial symbol reading, if we need full
9533 DIEs to process an unusual case (e.g. template arguments). Do
9534 not queue PER_CU, just tell our caller to load its DIEs. */
9535 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9537 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9542 /* Mark the dependence relation so that we don't flush PER_CU
9544 if (dependent_cu
!= NULL
)
9545 dwarf2_add_dependence (dependent_cu
, per_cu
);
9547 /* If it's already on the queue, we have nothing to do. */
9551 /* If the compilation unit is already loaded, just mark it as
9553 if (per_cu
->cu
!= NULL
)
9555 per_cu
->cu
->last_used
= 0;
9559 /* Add it to the queue. */
9560 queue_comp_unit (per_cu
, pretend_language
);
9565 /* Process the queue. */
9568 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9570 struct dwarf2_queue_item
*item
, *next_item
;
9572 if (dwarf_read_debug
)
9574 fprintf_unfiltered (gdb_stdlog
,
9575 "Expanding one or more symtabs of objfile %s ...\n",
9576 objfile_name (dwarf2_per_objfile
->objfile
));
9579 /* The queue starts out with one item, but following a DIE reference
9580 may load a new CU, adding it to the end of the queue. */
9581 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9583 if ((dwarf2_per_objfile
->using_index
9584 ? !item
->per_cu
->v
.quick
->compunit_symtab
9585 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9586 /* Skip dummy CUs. */
9587 && item
->per_cu
->cu
!= NULL
)
9589 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9590 unsigned int debug_print_threshold
;
9593 if (per_cu
->is_debug_types
)
9595 struct signatured_type
*sig_type
=
9596 (struct signatured_type
*) per_cu
;
9598 sprintf (buf
, "TU %s at offset %s",
9599 hex_string (sig_type
->signature
),
9600 sect_offset_str (per_cu
->sect_off
));
9601 /* There can be 100s of TUs.
9602 Only print them in verbose mode. */
9603 debug_print_threshold
= 2;
9607 sprintf (buf
, "CU at offset %s",
9608 sect_offset_str (per_cu
->sect_off
));
9609 debug_print_threshold
= 1;
9612 if (dwarf_read_debug
>= debug_print_threshold
)
9613 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9615 if (per_cu
->is_debug_types
)
9616 process_full_type_unit (per_cu
, item
->pretend_language
);
9618 process_full_comp_unit (per_cu
, item
->pretend_language
);
9620 if (dwarf_read_debug
>= debug_print_threshold
)
9621 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9624 item
->per_cu
->queued
= 0;
9625 next_item
= item
->next
;
9629 dwarf2_queue_tail
= NULL
;
9631 if (dwarf_read_debug
)
9633 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9634 objfile_name (dwarf2_per_objfile
->objfile
));
9638 /* Read in full symbols for PST, and anything it depends on. */
9641 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9643 struct dwarf2_per_cu_data
*per_cu
;
9649 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9650 if (!pst
->dependencies
[i
]->readin
9651 && pst
->dependencies
[i
]->user
== NULL
)
9653 /* Inform about additional files that need to be read in. */
9656 /* FIXME: i18n: Need to make this a single string. */
9657 fputs_filtered (" ", gdb_stdout
);
9659 fputs_filtered ("and ", gdb_stdout
);
9661 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9662 wrap_here (""); /* Flush output. */
9663 gdb_flush (gdb_stdout
);
9665 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9668 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9672 /* It's an include file, no symbols to read for it.
9673 Everything is in the parent symtab. */
9678 dw2_do_instantiate_symtab (per_cu
, false);
9681 /* Trivial hash function for die_info: the hash value of a DIE
9682 is its offset in .debug_info for this objfile. */
9685 die_hash (const void *item
)
9687 const struct die_info
*die
= (const struct die_info
*) item
;
9689 return to_underlying (die
->sect_off
);
9692 /* Trivial comparison function for die_info structures: two DIEs
9693 are equal if they have the same offset. */
9696 die_eq (const void *item_lhs
, const void *item_rhs
)
9698 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9699 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9701 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9704 /* die_reader_func for load_full_comp_unit.
9705 This is identical to read_signatured_type_reader,
9706 but is kept separate for now. */
9709 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9710 const gdb_byte
*info_ptr
,
9711 struct die_info
*comp_unit_die
,
9715 struct dwarf2_cu
*cu
= reader
->cu
;
9716 enum language
*language_ptr
= (enum language
*) data
;
9718 gdb_assert (cu
->die_hash
== NULL
);
9720 htab_create_alloc_ex (cu
->header
.length
/ 12,
9724 &cu
->comp_unit_obstack
,
9725 hashtab_obstack_allocate
,
9726 dummy_obstack_deallocate
);
9729 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9730 &info_ptr
, comp_unit_die
);
9731 cu
->dies
= comp_unit_die
;
9732 /* comp_unit_die is not stored in die_hash, no need. */
9734 /* We try not to read any attributes in this function, because not
9735 all CUs needed for references have been loaded yet, and symbol
9736 table processing isn't initialized. But we have to set the CU language,
9737 or we won't be able to build types correctly.
9738 Similarly, if we do not read the producer, we can not apply
9739 producer-specific interpretation. */
9740 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9743 /* Load the DIEs associated with PER_CU into memory. */
9746 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9748 enum language pretend_language
)
9750 gdb_assert (! this_cu
->is_debug_types
);
9752 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, skip_partial
,
9753 load_full_comp_unit_reader
, &pretend_language
);
9756 /* Add a DIE to the delayed physname list. */
9759 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9760 const char *name
, struct die_info
*die
,
9761 struct dwarf2_cu
*cu
)
9763 struct delayed_method_info mi
;
9765 mi
.fnfield_index
= fnfield_index
;
9769 cu
->method_list
.push_back (mi
);
9772 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9773 "const" / "volatile". If so, decrements LEN by the length of the
9774 modifier and return true. Otherwise return false. */
9778 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9780 size_t mod_len
= sizeof (mod
) - 1;
9781 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9789 /* Compute the physnames of any methods on the CU's method list.
9791 The computation of method physnames is delayed in order to avoid the
9792 (bad) condition that one of the method's formal parameters is of an as yet
9796 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9798 /* Only C++ delays computing physnames. */
9799 if (cu
->method_list
.empty ())
9801 gdb_assert (cu
->language
== language_cplus
);
9803 for (const delayed_method_info
&mi
: cu
->method_list
)
9805 const char *physname
;
9806 struct fn_fieldlist
*fn_flp
9807 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9808 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9809 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9810 = physname
? physname
: "";
9812 /* Since there's no tag to indicate whether a method is a
9813 const/volatile overload, extract that information out of the
9815 if (physname
!= NULL
)
9817 size_t len
= strlen (physname
);
9821 if (physname
[len
] == ')') /* shortcut */
9823 else if (check_modifier (physname
, len
, " const"))
9824 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9825 else if (check_modifier (physname
, len
, " volatile"))
9826 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9833 /* The list is no longer needed. */
9834 cu
->method_list
.clear ();
9837 /* Go objects should be embedded in a DW_TAG_module DIE,
9838 and it's not clear if/how imported objects will appear.
9839 To keep Go support simple until that's worked out,
9840 go back through what we've read and create something usable.
9841 We could do this while processing each DIE, and feels kinda cleaner,
9842 but that way is more invasive.
9843 This is to, for example, allow the user to type "p var" or "b main"
9844 without having to specify the package name, and allow lookups
9845 of module.object to work in contexts that use the expression
9849 fixup_go_packaging (struct dwarf2_cu
*cu
)
9851 char *package_name
= NULL
;
9852 struct pending
*list
;
9855 for (list
= *cu
->get_builder ()->get_global_symbols ();
9859 for (i
= 0; i
< list
->nsyms
; ++i
)
9861 struct symbol
*sym
= list
->symbol
[i
];
9863 if (SYMBOL_LANGUAGE (sym
) == language_go
9864 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9866 char *this_package_name
= go_symbol_package_name (sym
);
9868 if (this_package_name
== NULL
)
9870 if (package_name
== NULL
)
9871 package_name
= this_package_name
;
9874 struct objfile
*objfile
9875 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9876 if (strcmp (package_name
, this_package_name
) != 0)
9877 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9878 (symbol_symtab (sym
) != NULL
9879 ? symtab_to_filename_for_display
9880 (symbol_symtab (sym
))
9881 : objfile_name (objfile
)),
9882 this_package_name
, package_name
);
9883 xfree (this_package_name
);
9889 if (package_name
!= NULL
)
9891 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9892 const char *saved_package_name
9893 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
, package_name
);
9894 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9895 saved_package_name
);
9898 sym
= allocate_symbol (objfile
);
9899 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9900 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9901 strlen (saved_package_name
), 0, objfile
);
9902 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9903 e.g., "main" finds the "main" module and not C's main(). */
9904 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9905 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9906 SYMBOL_TYPE (sym
) = type
;
9908 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9910 xfree (package_name
);
9914 /* Allocate a fully-qualified name consisting of the two parts on the
9918 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9920 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9923 /* A helper that allocates a struct discriminant_info to attach to a
9926 static struct discriminant_info
*
9927 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9930 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9931 gdb_assert (discriminant_index
== -1
9932 || (discriminant_index
>= 0
9933 && discriminant_index
< TYPE_NFIELDS (type
)));
9934 gdb_assert (default_index
== -1
9935 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9937 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9939 struct discriminant_info
*disc
9940 = ((struct discriminant_info
*)
9942 offsetof (struct discriminant_info
, discriminants
)
9943 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9944 disc
->default_index
= default_index
;
9945 disc
->discriminant_index
= discriminant_index
;
9947 struct dynamic_prop prop
;
9948 prop
.kind
= PROP_UNDEFINED
;
9949 prop
.data
.baton
= disc
;
9951 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9956 /* Some versions of rustc emitted enums in an unusual way.
9958 Ordinary enums were emitted as unions. The first element of each
9959 structure in the union was named "RUST$ENUM$DISR". This element
9960 held the discriminant.
9962 These versions of Rust also implemented the "non-zero"
9963 optimization. When the enum had two values, and one is empty and
9964 the other holds a pointer that cannot be zero, the pointer is used
9965 as the discriminant, with a zero value meaning the empty variant.
9966 Here, the union's first member is of the form
9967 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9968 where the fieldnos are the indices of the fields that should be
9969 traversed in order to find the field (which may be several fields deep)
9970 and the variantname is the name of the variant of the case when the
9973 This function recognizes whether TYPE is of one of these forms,
9974 and, if so, smashes it to be a variant type. */
9977 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9979 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9981 /* We don't need to deal with empty enums. */
9982 if (TYPE_NFIELDS (type
) == 0)
9985 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9986 if (TYPE_NFIELDS (type
) == 1
9987 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9989 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9991 /* Decode the field name to find the offset of the
9993 ULONGEST bit_offset
= 0;
9994 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9995 while (name
[0] >= '0' && name
[0] <= '9')
9998 unsigned long index
= strtoul (name
, &tail
, 10);
10001 || index
>= TYPE_NFIELDS (field_type
)
10002 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
10003 != FIELD_LOC_KIND_BITPOS
))
10005 complaint (_("Could not parse Rust enum encoding string \"%s\""
10007 TYPE_FIELD_NAME (type
, 0),
10008 objfile_name (objfile
));
10013 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
10014 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
10017 /* Make a union to hold the variants. */
10018 struct type
*union_type
= alloc_type (objfile
);
10019 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10020 TYPE_NFIELDS (union_type
) = 3;
10021 TYPE_FIELDS (union_type
)
10022 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
10023 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10024 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10026 /* Put the discriminant must at index 0. */
10027 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
10028 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10029 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10030 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
10032 /* The order of fields doesn't really matter, so put the real
10033 field at index 1 and the data-less field at index 2. */
10034 struct discriminant_info
*disc
10035 = alloc_discriminant_info (union_type
, 0, 1);
10036 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
10037 TYPE_FIELD_NAME (union_type
, 1)
10038 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
10039 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
10040 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
10041 TYPE_FIELD_NAME (union_type
, 1));
10043 const char *dataless_name
10044 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
10046 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
10048 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
10049 /* NAME points into the original discriminant name, which
10050 already has the correct lifetime. */
10051 TYPE_FIELD_NAME (union_type
, 2) = name
;
10052 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
10053 disc
->discriminants
[2] = 0;
10055 /* Smash this type to be a structure type. We have to do this
10056 because the type has already been recorded. */
10057 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10058 TYPE_NFIELDS (type
) = 1;
10060 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
10062 /* Install the variant part. */
10063 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10064 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10065 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10067 /* A union with a single anonymous field is probably an old-style
10068 univariant enum. */
10069 else if (TYPE_NFIELDS (type
) == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
10071 /* Smash this type to be a structure type. We have to do this
10072 because the type has already been recorded. */
10073 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10075 /* Make a union to hold the variants. */
10076 struct type
*union_type
= alloc_type (objfile
);
10077 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10078 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
10079 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10080 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10081 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
10083 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
10084 const char *variant_name
10085 = rust_last_path_segment (TYPE_NAME (field_type
));
10086 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
10087 TYPE_NAME (field_type
)
10088 = rust_fully_qualify (&objfile
->objfile_obstack
,
10089 TYPE_NAME (type
), variant_name
);
10091 /* Install the union in the outer struct type. */
10092 TYPE_NFIELDS (type
) = 1;
10094 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
10095 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10096 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10097 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10099 alloc_discriminant_info (union_type
, -1, 0);
10103 struct type
*disr_type
= nullptr;
10104 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
10106 disr_type
= TYPE_FIELD_TYPE (type
, i
);
10108 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
10110 /* All fields of a true enum will be structs. */
10113 else if (TYPE_NFIELDS (disr_type
) == 0)
10115 /* Could be data-less variant, so keep going. */
10116 disr_type
= nullptr;
10118 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
10119 "RUST$ENUM$DISR") != 0)
10121 /* Not a Rust enum. */
10131 /* If we got here without a discriminant, then it's probably
10133 if (disr_type
== nullptr)
10136 /* Smash this type to be a structure type. We have to do this
10137 because the type has already been recorded. */
10138 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10140 /* Make a union to hold the variants. */
10141 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10142 struct type
*union_type
= alloc_type (objfile
);
10143 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10144 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10145 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10146 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10147 TYPE_FIELDS (union_type
)
10148 = (struct field
*) TYPE_ZALLOC (union_type
,
10149 (TYPE_NFIELDS (union_type
)
10150 * sizeof (struct field
)));
10152 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10153 TYPE_NFIELDS (type
) * sizeof (struct field
));
10155 /* Install the discriminant at index 0 in the union. */
10156 TYPE_FIELD (union_type
, 0) = *disr_field
;
10157 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10158 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10160 /* Install the union in the outer struct type. */
10161 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10162 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10163 TYPE_NFIELDS (type
) = 1;
10165 /* Set the size and offset of the union type. */
10166 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10168 /* We need a way to find the correct discriminant given a
10169 variant name. For convenience we build a map here. */
10170 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10171 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10172 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10174 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10177 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10178 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10182 int n_fields
= TYPE_NFIELDS (union_type
);
10183 struct discriminant_info
*disc
10184 = alloc_discriminant_info (union_type
, 0, -1);
10185 /* Skip the discriminant here. */
10186 for (int i
= 1; i
< n_fields
; ++i
)
10188 /* Find the final word in the name of this variant's type.
10189 That name can be used to look up the correct
10191 const char *variant_name
10192 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10195 auto iter
= discriminant_map
.find (variant_name
);
10196 if (iter
!= discriminant_map
.end ())
10197 disc
->discriminants
[i
] = iter
->second
;
10199 /* Remove the discriminant field, if it exists. */
10200 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10201 if (TYPE_NFIELDS (sub_type
) > 0)
10203 --TYPE_NFIELDS (sub_type
);
10204 ++TYPE_FIELDS (sub_type
);
10206 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10207 TYPE_NAME (sub_type
)
10208 = rust_fully_qualify (&objfile
->objfile_obstack
,
10209 TYPE_NAME (type
), variant_name
);
10214 /* Rewrite some Rust unions to be structures with variants parts. */
10217 rust_union_quirks (struct dwarf2_cu
*cu
)
10219 gdb_assert (cu
->language
== language_rust
);
10220 for (type
*type_
: cu
->rust_unions
)
10221 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10222 /* We don't need this any more. */
10223 cu
->rust_unions
.clear ();
10226 /* Return the symtab for PER_CU. This works properly regardless of
10227 whether we're using the index or psymtabs. */
10229 static struct compunit_symtab
*
10230 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10232 return (per_cu
->dwarf2_per_objfile
->using_index
10233 ? per_cu
->v
.quick
->compunit_symtab
10234 : per_cu
->v
.psymtab
->compunit_symtab
);
10237 /* A helper function for computing the list of all symbol tables
10238 included by PER_CU. */
10241 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
10242 htab_t all_children
, htab_t all_type_symtabs
,
10243 struct dwarf2_per_cu_data
*per_cu
,
10244 struct compunit_symtab
*immediate_parent
)
10248 struct compunit_symtab
*cust
;
10249 struct dwarf2_per_cu_data
*iter
;
10251 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10254 /* This inclusion and its children have been processed. */
10259 /* Only add a CU if it has a symbol table. */
10260 cust
= get_compunit_symtab (per_cu
);
10263 /* If this is a type unit only add its symbol table if we haven't
10264 seen it yet (type unit per_cu's can share symtabs). */
10265 if (per_cu
->is_debug_types
)
10267 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10271 result
->push_back (cust
);
10272 if (cust
->user
== NULL
)
10273 cust
->user
= immediate_parent
;
10278 result
->push_back (cust
);
10279 if (cust
->user
== NULL
)
10280 cust
->user
= immediate_parent
;
10285 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10288 recursively_compute_inclusions (result
, all_children
,
10289 all_type_symtabs
, iter
, cust
);
10293 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10297 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10299 gdb_assert (! per_cu
->is_debug_types
);
10301 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10304 struct dwarf2_per_cu_data
*per_cu_iter
;
10305 std::vector
<compunit_symtab
*> result_symtabs
;
10306 htab_t all_children
, all_type_symtabs
;
10307 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10309 /* If we don't have a symtab, we can just skip this case. */
10313 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10314 NULL
, xcalloc
, xfree
);
10315 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10316 NULL
, xcalloc
, xfree
);
10319 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10323 recursively_compute_inclusions (&result_symtabs
, all_children
,
10324 all_type_symtabs
, per_cu_iter
,
10328 /* Now we have a transitive closure of all the included symtabs. */
10329 len
= result_symtabs
.size ();
10331 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10332 struct compunit_symtab
*, len
+ 1);
10333 memcpy (cust
->includes
, result_symtabs
.data (),
10334 len
* sizeof (compunit_symtab
*));
10335 cust
->includes
[len
] = NULL
;
10337 htab_delete (all_children
);
10338 htab_delete (all_type_symtabs
);
10342 /* Compute the 'includes' field for the symtabs of all the CUs we just
10346 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10348 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
10350 if (! iter
->is_debug_types
)
10351 compute_compunit_symtab_includes (iter
);
10354 dwarf2_per_objfile
->just_read_cus
.clear ();
10357 /* Generate full symbol information for PER_CU, whose DIEs have
10358 already been loaded into memory. */
10361 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10362 enum language pretend_language
)
10364 struct dwarf2_cu
*cu
= per_cu
->cu
;
10365 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10366 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10367 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10368 CORE_ADDR lowpc
, highpc
;
10369 struct compunit_symtab
*cust
;
10370 CORE_ADDR baseaddr
;
10371 struct block
*static_block
;
10374 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10376 /* Clear the list here in case something was left over. */
10377 cu
->method_list
.clear ();
10379 cu
->language
= pretend_language
;
10380 cu
->language_defn
= language_def (cu
->language
);
10382 /* Do line number decoding in read_file_scope () */
10383 process_die (cu
->dies
, cu
);
10385 /* For now fudge the Go package. */
10386 if (cu
->language
== language_go
)
10387 fixup_go_packaging (cu
);
10389 /* Now that we have processed all the DIEs in the CU, all the types
10390 should be complete, and it should now be safe to compute all of the
10392 compute_delayed_physnames (cu
);
10394 if (cu
->language
== language_rust
)
10395 rust_union_quirks (cu
);
10397 /* Some compilers don't define a DW_AT_high_pc attribute for the
10398 compilation unit. If the DW_AT_high_pc is missing, synthesize
10399 it, by scanning the DIE's below the compilation unit. */
10400 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10402 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10403 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
10405 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10406 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10407 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10408 addrmap to help ensure it has an accurate map of pc values belonging to
10410 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10412 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
10413 SECT_OFF_TEXT (objfile
),
10418 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10420 /* Set symtab language to language from DW_AT_language. If the
10421 compilation is from a C file generated by language preprocessors, do
10422 not set the language if it was already deduced by start_subfile. */
10423 if (!(cu
->language
== language_c
10424 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10425 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10427 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10428 produce DW_AT_location with location lists but it can be possibly
10429 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10430 there were bugs in prologue debug info, fixed later in GCC-4.5
10431 by "unwind info for epilogues" patch (which is not directly related).
10433 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10434 needed, it would be wrong due to missing DW_AT_producer there.
10436 Still one can confuse GDB by using non-standard GCC compilation
10437 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10439 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10440 cust
->locations_valid
= 1;
10442 if (gcc_4_minor
>= 5)
10443 cust
->epilogue_unwind_valid
= 1;
10445 cust
->call_site_htab
= cu
->call_site_htab
;
10448 if (dwarf2_per_objfile
->using_index
)
10449 per_cu
->v
.quick
->compunit_symtab
= cust
;
10452 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10453 pst
->compunit_symtab
= cust
;
10457 /* Push it for inclusion processing later. */
10458 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
10460 /* Not needed any more. */
10461 cu
->reset_builder ();
10464 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10465 already been loaded into memory. */
10468 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10469 enum language pretend_language
)
10471 struct dwarf2_cu
*cu
= per_cu
->cu
;
10472 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10473 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10474 struct compunit_symtab
*cust
;
10475 struct signatured_type
*sig_type
;
10477 gdb_assert (per_cu
->is_debug_types
);
10478 sig_type
= (struct signatured_type
*) per_cu
;
10480 /* Clear the list here in case something was left over. */
10481 cu
->method_list
.clear ();
10483 cu
->language
= pretend_language
;
10484 cu
->language_defn
= language_def (cu
->language
);
10486 /* The symbol tables are set up in read_type_unit_scope. */
10487 process_die (cu
->dies
, cu
);
10489 /* For now fudge the Go package. */
10490 if (cu
->language
== language_go
)
10491 fixup_go_packaging (cu
);
10493 /* Now that we have processed all the DIEs in the CU, all the types
10494 should be complete, and it should now be safe to compute all of the
10496 compute_delayed_physnames (cu
);
10498 if (cu
->language
== language_rust
)
10499 rust_union_quirks (cu
);
10501 /* TUs share symbol tables.
10502 If this is the first TU to use this symtab, complete the construction
10503 of it with end_expandable_symtab. Otherwise, complete the addition of
10504 this TU's symbols to the existing symtab. */
10505 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10507 buildsym_compunit
*builder
= cu
->get_builder ();
10508 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10509 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10513 /* Set symtab language to language from DW_AT_language. If the
10514 compilation is from a C file generated by language preprocessors,
10515 do not set the language if it was already deduced by
10517 if (!(cu
->language
== language_c
10518 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10519 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10524 cu
->get_builder ()->augment_type_symtab ();
10525 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10528 if (dwarf2_per_objfile
->using_index
)
10529 per_cu
->v
.quick
->compunit_symtab
= cust
;
10532 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10533 pst
->compunit_symtab
= cust
;
10537 /* Not needed any more. */
10538 cu
->reset_builder ();
10541 /* Process an imported unit DIE. */
10544 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10546 struct attribute
*attr
;
10548 /* For now we don't handle imported units in type units. */
10549 if (cu
->per_cu
->is_debug_types
)
10551 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10552 " supported in type units [in module %s]"),
10553 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10556 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10559 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10560 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10561 dwarf2_per_cu_data
*per_cu
10562 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10563 cu
->per_cu
->dwarf2_per_objfile
);
10565 /* If necessary, add it to the queue and load its DIEs. */
10566 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10567 load_full_comp_unit (per_cu
, false, cu
->language
);
10569 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10574 /* RAII object that represents a process_die scope: i.e.,
10575 starts/finishes processing a DIE. */
10576 class process_die_scope
10579 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10580 : m_die (die
), m_cu (cu
)
10582 /* We should only be processing DIEs not already in process. */
10583 gdb_assert (!m_die
->in_process
);
10584 m_die
->in_process
= true;
10587 ~process_die_scope ()
10589 m_die
->in_process
= false;
10591 /* If we're done processing the DIE for the CU that owns the line
10592 header, we don't need the line header anymore. */
10593 if (m_cu
->line_header_die_owner
== m_die
)
10595 delete m_cu
->line_header
;
10596 m_cu
->line_header
= NULL
;
10597 m_cu
->line_header_die_owner
= NULL
;
10606 /* Process a die and its children. */
10609 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10611 process_die_scope
scope (die
, cu
);
10615 case DW_TAG_padding
:
10617 case DW_TAG_compile_unit
:
10618 case DW_TAG_partial_unit
:
10619 read_file_scope (die
, cu
);
10621 case DW_TAG_type_unit
:
10622 read_type_unit_scope (die
, cu
);
10624 case DW_TAG_subprogram
:
10625 /* Nested subprograms in Fortran get a prefix. */
10626 if (cu
->language
== language_fortran
10627 && die
->parent
!= NULL
10628 && die
->parent
->tag
== DW_TAG_subprogram
)
10629 cu
->processing_has_namespace_info
= true;
10630 /* Fall through. */
10631 case DW_TAG_inlined_subroutine
:
10632 read_func_scope (die
, cu
);
10634 case DW_TAG_lexical_block
:
10635 case DW_TAG_try_block
:
10636 case DW_TAG_catch_block
:
10637 read_lexical_block_scope (die
, cu
);
10639 case DW_TAG_call_site
:
10640 case DW_TAG_GNU_call_site
:
10641 read_call_site_scope (die
, cu
);
10643 case DW_TAG_class_type
:
10644 case DW_TAG_interface_type
:
10645 case DW_TAG_structure_type
:
10646 case DW_TAG_union_type
:
10647 process_structure_scope (die
, cu
);
10649 case DW_TAG_enumeration_type
:
10650 process_enumeration_scope (die
, cu
);
10653 /* These dies have a type, but processing them does not create
10654 a symbol or recurse to process the children. Therefore we can
10655 read them on-demand through read_type_die. */
10656 case DW_TAG_subroutine_type
:
10657 case DW_TAG_set_type
:
10658 case DW_TAG_array_type
:
10659 case DW_TAG_pointer_type
:
10660 case DW_TAG_ptr_to_member_type
:
10661 case DW_TAG_reference_type
:
10662 case DW_TAG_rvalue_reference_type
:
10663 case DW_TAG_string_type
:
10666 case DW_TAG_base_type
:
10667 case DW_TAG_subrange_type
:
10668 case DW_TAG_typedef
:
10669 /* Add a typedef symbol for the type definition, if it has a
10671 new_symbol (die
, read_type_die (die
, cu
), cu
);
10673 case DW_TAG_common_block
:
10674 read_common_block (die
, cu
);
10676 case DW_TAG_common_inclusion
:
10678 case DW_TAG_namespace
:
10679 cu
->processing_has_namespace_info
= true;
10680 read_namespace (die
, cu
);
10682 case DW_TAG_module
:
10683 cu
->processing_has_namespace_info
= true;
10684 read_module (die
, cu
);
10686 case DW_TAG_imported_declaration
:
10687 cu
->processing_has_namespace_info
= true;
10688 if (read_namespace_alias (die
, cu
))
10690 /* The declaration is not a global namespace alias. */
10691 /* Fall through. */
10692 case DW_TAG_imported_module
:
10693 cu
->processing_has_namespace_info
= true;
10694 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10695 || cu
->language
!= language_fortran
))
10696 complaint (_("Tag '%s' has unexpected children"),
10697 dwarf_tag_name (die
->tag
));
10698 read_import_statement (die
, cu
);
10701 case DW_TAG_imported_unit
:
10702 process_imported_unit_die (die
, cu
);
10705 case DW_TAG_variable
:
10706 read_variable (die
, cu
);
10710 new_symbol (die
, NULL
, cu
);
10715 /* DWARF name computation. */
10717 /* A helper function for dwarf2_compute_name which determines whether DIE
10718 needs to have the name of the scope prepended to the name listed in the
10722 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10724 struct attribute
*attr
;
10728 case DW_TAG_namespace
:
10729 case DW_TAG_typedef
:
10730 case DW_TAG_class_type
:
10731 case DW_TAG_interface_type
:
10732 case DW_TAG_structure_type
:
10733 case DW_TAG_union_type
:
10734 case DW_TAG_enumeration_type
:
10735 case DW_TAG_enumerator
:
10736 case DW_TAG_subprogram
:
10737 case DW_TAG_inlined_subroutine
:
10738 case DW_TAG_member
:
10739 case DW_TAG_imported_declaration
:
10742 case DW_TAG_variable
:
10743 case DW_TAG_constant
:
10744 /* We only need to prefix "globally" visible variables. These include
10745 any variable marked with DW_AT_external or any variable that
10746 lives in a namespace. [Variables in anonymous namespaces
10747 require prefixing, but they are not DW_AT_external.] */
10749 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10751 struct dwarf2_cu
*spec_cu
= cu
;
10753 return die_needs_namespace (die_specification (die
, &spec_cu
),
10757 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10758 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10759 && die
->parent
->tag
!= DW_TAG_module
)
10761 /* A variable in a lexical block of some kind does not need a
10762 namespace, even though in C++ such variables may be external
10763 and have a mangled name. */
10764 if (die
->parent
->tag
== DW_TAG_lexical_block
10765 || die
->parent
->tag
== DW_TAG_try_block
10766 || die
->parent
->tag
== DW_TAG_catch_block
10767 || die
->parent
->tag
== DW_TAG_subprogram
)
10776 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10777 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10778 defined for the given DIE. */
10780 static struct attribute
*
10781 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10783 struct attribute
*attr
;
10785 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10787 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10792 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10793 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10794 defined for the given DIE. */
10796 static const char *
10797 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10799 const char *linkage_name
;
10801 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10802 if (linkage_name
== NULL
)
10803 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10805 return linkage_name
;
10808 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10809 compute the physname for the object, which include a method's:
10810 - formal parameters (C++),
10811 - receiver type (Go),
10813 The term "physname" is a bit confusing.
10814 For C++, for example, it is the demangled name.
10815 For Go, for example, it's the mangled name.
10817 For Ada, return the DIE's linkage name rather than the fully qualified
10818 name. PHYSNAME is ignored..
10820 The result is allocated on the objfile_obstack and canonicalized. */
10822 static const char *
10823 dwarf2_compute_name (const char *name
,
10824 struct die_info
*die
, struct dwarf2_cu
*cu
,
10827 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10830 name
= dwarf2_name (die
, cu
);
10832 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10833 but otherwise compute it by typename_concat inside GDB.
10834 FIXME: Actually this is not really true, or at least not always true.
10835 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10836 Fortran names because there is no mangling standard. So new_symbol
10837 will set the demangled name to the result of dwarf2_full_name, and it is
10838 the demangled name that GDB uses if it exists. */
10839 if (cu
->language
== language_ada
10840 || (cu
->language
== language_fortran
&& physname
))
10842 /* For Ada unit, we prefer the linkage name over the name, as
10843 the former contains the exported name, which the user expects
10844 to be able to reference. Ideally, we want the user to be able
10845 to reference this entity using either natural or linkage name,
10846 but we haven't started looking at this enhancement yet. */
10847 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10849 if (linkage_name
!= NULL
)
10850 return linkage_name
;
10853 /* These are the only languages we know how to qualify names in. */
10855 && (cu
->language
== language_cplus
10856 || cu
->language
== language_fortran
|| cu
->language
== language_d
10857 || cu
->language
== language_rust
))
10859 if (die_needs_namespace (die
, cu
))
10861 const char *prefix
;
10862 const char *canonical_name
= NULL
;
10866 prefix
= determine_prefix (die
, cu
);
10867 if (*prefix
!= '\0')
10869 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10872 buf
.puts (prefixed_name
);
10873 xfree (prefixed_name
);
10878 /* Template parameters may be specified in the DIE's DW_AT_name, or
10879 as children with DW_TAG_template_type_param or
10880 DW_TAG_value_type_param. If the latter, add them to the name
10881 here. If the name already has template parameters, then
10882 skip this step; some versions of GCC emit both, and
10883 it is more efficient to use the pre-computed name.
10885 Something to keep in mind about this process: it is very
10886 unlikely, or in some cases downright impossible, to produce
10887 something that will match the mangled name of a function.
10888 If the definition of the function has the same debug info,
10889 we should be able to match up with it anyway. But fallbacks
10890 using the minimal symbol, for instance to find a method
10891 implemented in a stripped copy of libstdc++, will not work.
10892 If we do not have debug info for the definition, we will have to
10893 match them up some other way.
10895 When we do name matching there is a related problem with function
10896 templates; two instantiated function templates are allowed to
10897 differ only by their return types, which we do not add here. */
10899 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10901 struct attribute
*attr
;
10902 struct die_info
*child
;
10905 die
->building_fullname
= 1;
10907 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10911 const gdb_byte
*bytes
;
10912 struct dwarf2_locexpr_baton
*baton
;
10915 if (child
->tag
!= DW_TAG_template_type_param
10916 && child
->tag
!= DW_TAG_template_value_param
)
10927 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10930 complaint (_("template parameter missing DW_AT_type"));
10931 buf
.puts ("UNKNOWN_TYPE");
10934 type
= die_type (child
, cu
);
10936 if (child
->tag
== DW_TAG_template_type_param
)
10938 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10939 &type_print_raw_options
);
10943 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10946 complaint (_("template parameter missing "
10947 "DW_AT_const_value"));
10948 buf
.puts ("UNKNOWN_VALUE");
10952 dwarf2_const_value_attr (attr
, type
, name
,
10953 &cu
->comp_unit_obstack
, cu
,
10954 &value
, &bytes
, &baton
);
10956 if (TYPE_NOSIGN (type
))
10957 /* GDB prints characters as NUMBER 'CHAR'. If that's
10958 changed, this can use value_print instead. */
10959 c_printchar (value
, type
, &buf
);
10962 struct value_print_options opts
;
10965 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10969 else if (bytes
!= NULL
)
10971 v
= allocate_value (type
);
10972 memcpy (value_contents_writeable (v
), bytes
,
10973 TYPE_LENGTH (type
));
10976 v
= value_from_longest (type
, value
);
10978 /* Specify decimal so that we do not depend on
10980 get_formatted_print_options (&opts
, 'd');
10982 value_print (v
, &buf
, &opts
);
10987 die
->building_fullname
= 0;
10991 /* Close the argument list, with a space if necessary
10992 (nested templates). */
10993 if (!buf
.empty () && buf
.string ().back () == '>')
11000 /* For C++ methods, append formal parameter type
11001 information, if PHYSNAME. */
11003 if (physname
&& die
->tag
== DW_TAG_subprogram
11004 && cu
->language
== language_cplus
)
11006 struct type
*type
= read_type_die (die
, cu
);
11008 c_type_print_args (type
, &buf
, 1, cu
->language
,
11009 &type_print_raw_options
);
11011 if (cu
->language
== language_cplus
)
11013 /* Assume that an artificial first parameter is
11014 "this", but do not crash if it is not. RealView
11015 marks unnamed (and thus unused) parameters as
11016 artificial; there is no way to differentiate
11018 if (TYPE_NFIELDS (type
) > 0
11019 && TYPE_FIELD_ARTIFICIAL (type
, 0)
11020 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
11021 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
11023 buf
.puts (" const");
11027 const std::string
&intermediate_name
= buf
.string ();
11029 if (cu
->language
== language_cplus
)
11031 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
11032 &objfile
->per_bfd
->storage_obstack
);
11034 /* If we only computed INTERMEDIATE_NAME, or if
11035 INTERMEDIATE_NAME is already canonical, then we need to
11036 copy it to the appropriate obstack. */
11037 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
11038 name
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
11039 intermediate_name
);
11041 name
= canonical_name
;
11048 /* Return the fully qualified name of DIE, based on its DW_AT_name.
11049 If scope qualifiers are appropriate they will be added. The result
11050 will be allocated on the storage_obstack, or NULL if the DIE does
11051 not have a name. NAME may either be from a previous call to
11052 dwarf2_name or NULL.
11054 The output string will be canonicalized (if C++). */
11056 static const char *
11057 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11059 return dwarf2_compute_name (name
, die
, cu
, 0);
11062 /* Construct a physname for the given DIE in CU. NAME may either be
11063 from a previous call to dwarf2_name or NULL. The result will be
11064 allocated on the objfile_objstack or NULL if the DIE does not have a
11067 The output string will be canonicalized (if C++). */
11069 static const char *
11070 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11072 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11073 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
11076 /* In this case dwarf2_compute_name is just a shortcut not building anything
11078 if (!die_needs_namespace (die
, cu
))
11079 return dwarf2_compute_name (name
, die
, cu
, 1);
11081 mangled
= dw2_linkage_name (die
, cu
);
11083 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
11084 See https://github.com/rust-lang/rust/issues/32925. */
11085 if (cu
->language
== language_rust
&& mangled
!= NULL
11086 && strchr (mangled
, '{') != NULL
)
11089 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
11091 gdb::unique_xmalloc_ptr
<char> demangled
;
11092 if (mangled
!= NULL
)
11095 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
11097 /* Do nothing (do not demangle the symbol name). */
11099 else if (cu
->language
== language_go
)
11101 /* This is a lie, but we already lie to the caller new_symbol.
11102 new_symbol assumes we return the mangled name.
11103 This just undoes that lie until things are cleaned up. */
11107 /* Use DMGL_RET_DROP for C++ template functions to suppress
11108 their return type. It is easier for GDB users to search
11109 for such functions as `name(params)' than `long name(params)'.
11110 In such case the minimal symbol names do not match the full
11111 symbol names but for template functions there is never a need
11112 to look up their definition from their declaration so
11113 the only disadvantage remains the minimal symbol variant
11114 `long name(params)' does not have the proper inferior type. */
11115 demangled
.reset (gdb_demangle (mangled
,
11116 (DMGL_PARAMS
| DMGL_ANSI
11117 | DMGL_RET_DROP
)));
11120 canon
= demangled
.get ();
11128 if (canon
== NULL
|| check_physname
)
11130 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11132 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11134 /* It may not mean a bug in GDB. The compiler could also
11135 compute DW_AT_linkage_name incorrectly. But in such case
11136 GDB would need to be bug-to-bug compatible. */
11138 complaint (_("Computed physname <%s> does not match demangled <%s> "
11139 "(from linkage <%s>) - DIE at %s [in module %s]"),
11140 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11141 objfile_name (objfile
));
11143 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11144 is available here - over computed PHYSNAME. It is safer
11145 against both buggy GDB and buggy compilers. */
11159 retval
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
, retval
);
11164 /* Inspect DIE in CU for a namespace alias. If one exists, record
11165 a new symbol for it.
11167 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11170 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11172 struct attribute
*attr
;
11174 /* If the die does not have a name, this is not a namespace
11176 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11180 struct die_info
*d
= die
;
11181 struct dwarf2_cu
*imported_cu
= cu
;
11183 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11184 keep inspecting DIEs until we hit the underlying import. */
11185 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11186 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11188 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11192 d
= follow_die_ref (d
, attr
, &imported_cu
);
11193 if (d
->tag
!= DW_TAG_imported_declaration
)
11197 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11199 complaint (_("DIE at %s has too many recursively imported "
11200 "declarations"), sect_offset_str (d
->sect_off
));
11207 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11209 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11210 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11212 /* This declaration is a global namespace alias. Add
11213 a symbol for it whose type is the aliased namespace. */
11214 new_symbol (die
, type
, cu
);
11223 /* Return the using directives repository (global or local?) to use in the
11224 current context for CU.
11226 For Ada, imported declarations can materialize renamings, which *may* be
11227 global. However it is impossible (for now?) in DWARF to distinguish
11228 "external" imported declarations and "static" ones. As all imported
11229 declarations seem to be static in all other languages, make them all CU-wide
11230 global only in Ada. */
11232 static struct using_direct
**
11233 using_directives (struct dwarf2_cu
*cu
)
11235 if (cu
->language
== language_ada
11236 && cu
->get_builder ()->outermost_context_p ())
11237 return cu
->get_builder ()->get_global_using_directives ();
11239 return cu
->get_builder ()->get_local_using_directives ();
11242 /* Read the import statement specified by the given die and record it. */
11245 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11247 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11248 struct attribute
*import_attr
;
11249 struct die_info
*imported_die
, *child_die
;
11250 struct dwarf2_cu
*imported_cu
;
11251 const char *imported_name
;
11252 const char *imported_name_prefix
;
11253 const char *canonical_name
;
11254 const char *import_alias
;
11255 const char *imported_declaration
= NULL
;
11256 const char *import_prefix
;
11257 std::vector
<const char *> excludes
;
11259 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11260 if (import_attr
== NULL
)
11262 complaint (_("Tag '%s' has no DW_AT_import"),
11263 dwarf_tag_name (die
->tag
));
11268 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11269 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11270 if (imported_name
== NULL
)
11272 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11274 The import in the following code:
11288 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11289 <52> DW_AT_decl_file : 1
11290 <53> DW_AT_decl_line : 6
11291 <54> DW_AT_import : <0x75>
11292 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11293 <59> DW_AT_name : B
11294 <5b> DW_AT_decl_file : 1
11295 <5c> DW_AT_decl_line : 2
11296 <5d> DW_AT_type : <0x6e>
11298 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11299 <76> DW_AT_byte_size : 4
11300 <77> DW_AT_encoding : 5 (signed)
11302 imports the wrong die ( 0x75 instead of 0x58 ).
11303 This case will be ignored until the gcc bug is fixed. */
11307 /* Figure out the local name after import. */
11308 import_alias
= dwarf2_name (die
, cu
);
11310 /* Figure out where the statement is being imported to. */
11311 import_prefix
= determine_prefix (die
, cu
);
11313 /* Figure out what the scope of the imported die is and prepend it
11314 to the name of the imported die. */
11315 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11317 if (imported_die
->tag
!= DW_TAG_namespace
11318 && imported_die
->tag
!= DW_TAG_module
)
11320 imported_declaration
= imported_name
;
11321 canonical_name
= imported_name_prefix
;
11323 else if (strlen (imported_name_prefix
) > 0)
11324 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11325 imported_name_prefix
,
11326 (cu
->language
== language_d
? "." : "::"),
11327 imported_name
, (char *) NULL
);
11329 canonical_name
= imported_name
;
11331 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11332 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11333 child_die
= sibling_die (child_die
))
11335 /* DWARF-4: A Fortran use statement with a “rename list” may be
11336 represented by an imported module entry with an import attribute
11337 referring to the module and owned entries corresponding to those
11338 entities that are renamed as part of being imported. */
11340 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11342 complaint (_("child DW_TAG_imported_declaration expected "
11343 "- DIE at %s [in module %s]"),
11344 sect_offset_str (child_die
->sect_off
),
11345 objfile_name (objfile
));
11349 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11350 if (import_attr
== NULL
)
11352 complaint (_("Tag '%s' has no DW_AT_import"),
11353 dwarf_tag_name (child_die
->tag
));
11358 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11360 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11361 if (imported_name
== NULL
)
11363 complaint (_("child DW_TAG_imported_declaration has unknown "
11364 "imported name - DIE at %s [in module %s]"),
11365 sect_offset_str (child_die
->sect_off
),
11366 objfile_name (objfile
));
11370 excludes
.push_back (imported_name
);
11372 process_die (child_die
, cu
);
11375 add_using_directive (using_directives (cu
),
11379 imported_declaration
,
11382 &objfile
->objfile_obstack
);
11385 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11386 types, but gives them a size of zero. Starting with version 14,
11387 ICC is compatible with GCC. */
11390 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11392 if (!cu
->checked_producer
)
11393 check_producer (cu
);
11395 return cu
->producer_is_icc_lt_14
;
11398 /* ICC generates a DW_AT_type for C void functions. This was observed on
11399 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
11400 which says that void functions should not have a DW_AT_type. */
11403 producer_is_icc (struct dwarf2_cu
*cu
)
11405 if (!cu
->checked_producer
)
11406 check_producer (cu
);
11408 return cu
->producer_is_icc
;
11411 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11412 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11413 this, it was first present in GCC release 4.3.0. */
11416 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11418 if (!cu
->checked_producer
)
11419 check_producer (cu
);
11421 return cu
->producer_is_gcc_lt_4_3
;
11424 static file_and_directory
11425 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11427 file_and_directory res
;
11429 /* Find the filename. Do not use dwarf2_name here, since the filename
11430 is not a source language identifier. */
11431 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11432 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11434 if (res
.comp_dir
== NULL
11435 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11436 && IS_ABSOLUTE_PATH (res
.name
))
11438 res
.comp_dir_storage
= ldirname (res
.name
);
11439 if (!res
.comp_dir_storage
.empty ())
11440 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11442 if (res
.comp_dir
!= NULL
)
11444 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11445 directory, get rid of it. */
11446 const char *cp
= strchr (res
.comp_dir
, ':');
11448 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11449 res
.comp_dir
= cp
+ 1;
11452 if (res
.name
== NULL
)
11453 res
.name
= "<unknown>";
11458 /* Handle DW_AT_stmt_list for a compilation unit.
11459 DIE is the DW_TAG_compile_unit die for CU.
11460 COMP_DIR is the compilation directory. LOWPC is passed to
11461 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11464 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11465 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11467 struct dwarf2_per_objfile
*dwarf2_per_objfile
11468 = cu
->per_cu
->dwarf2_per_objfile
;
11469 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11470 struct attribute
*attr
;
11471 struct line_header line_header_local
;
11472 hashval_t line_header_local_hash
;
11474 int decode_mapping
;
11476 gdb_assert (! cu
->per_cu
->is_debug_types
);
11478 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11482 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11484 /* The line header hash table is only created if needed (it exists to
11485 prevent redundant reading of the line table for partial_units).
11486 If we're given a partial_unit, we'll need it. If we're given a
11487 compile_unit, then use the line header hash table if it's already
11488 created, but don't create one just yet. */
11490 if (dwarf2_per_objfile
->line_header_hash
== NULL
11491 && die
->tag
== DW_TAG_partial_unit
)
11493 dwarf2_per_objfile
->line_header_hash
11494 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11495 line_header_eq_voidp
,
11496 free_line_header_voidp
,
11497 &objfile
->objfile_obstack
,
11498 hashtab_obstack_allocate
,
11499 dummy_obstack_deallocate
);
11502 line_header_local
.sect_off
= line_offset
;
11503 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11504 line_header_local_hash
= line_header_hash (&line_header_local
);
11505 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11507 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11508 &line_header_local
,
11509 line_header_local_hash
, NO_INSERT
);
11511 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11512 is not present in *SLOT (since if there is something in *SLOT then
11513 it will be for a partial_unit). */
11514 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11516 gdb_assert (*slot
!= NULL
);
11517 cu
->line_header
= (struct line_header
*) *slot
;
11522 /* dwarf_decode_line_header does not yet provide sufficient information.
11523 We always have to call also dwarf_decode_lines for it. */
11524 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11528 cu
->line_header
= lh
.release ();
11529 cu
->line_header_die_owner
= die
;
11531 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11535 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11536 &line_header_local
,
11537 line_header_local_hash
, INSERT
);
11538 gdb_assert (slot
!= NULL
);
11540 if (slot
!= NULL
&& *slot
== NULL
)
11542 /* This newly decoded line number information unit will be owned
11543 by line_header_hash hash table. */
11544 *slot
= cu
->line_header
;
11545 cu
->line_header_die_owner
= NULL
;
11549 /* We cannot free any current entry in (*slot) as that struct line_header
11550 may be already used by multiple CUs. Create only temporary decoded
11551 line_header for this CU - it may happen at most once for each line
11552 number information unit. And if we're not using line_header_hash
11553 then this is what we want as well. */
11554 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11556 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11557 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11562 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11565 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11567 struct dwarf2_per_objfile
*dwarf2_per_objfile
11568 = cu
->per_cu
->dwarf2_per_objfile
;
11569 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11570 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11571 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11572 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11573 struct attribute
*attr
;
11574 struct die_info
*child_die
;
11575 CORE_ADDR baseaddr
;
11577 prepare_one_comp_unit (cu
, die
, cu
->language
);
11578 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11580 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11582 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11583 from finish_block. */
11584 if (lowpc
== ((CORE_ADDR
) -1))
11586 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11588 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11590 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11591 standardised yet. As a workaround for the language detection we fall
11592 back to the DW_AT_producer string. */
11593 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11594 cu
->language
= language_opencl
;
11596 /* Similar hack for Go. */
11597 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11598 set_cu_language (DW_LANG_Go
, cu
);
11600 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
11602 /* Decode line number information if present. We do this before
11603 processing child DIEs, so that the line header table is available
11604 for DW_AT_decl_file. */
11605 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11607 /* Process all dies in compilation unit. */
11608 if (die
->child
!= NULL
)
11610 child_die
= die
->child
;
11611 while (child_die
&& child_die
->tag
)
11613 process_die (child_die
, cu
);
11614 child_die
= sibling_die (child_die
);
11618 /* Decode macro information, if present. Dwarf 2 macro information
11619 refers to information in the line number info statement program
11620 header, so we can only read it if we've read the header
11622 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11624 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11625 if (attr
&& cu
->line_header
)
11627 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11628 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11630 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11634 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11635 if (attr
&& cu
->line_header
)
11637 unsigned int macro_offset
= DW_UNSND (attr
);
11639 dwarf_decode_macros (cu
, macro_offset
, 0);
11645 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11647 struct type_unit_group
*tu_group
;
11649 struct attribute
*attr
;
11651 struct signatured_type
*sig_type
;
11653 gdb_assert (per_cu
->is_debug_types
);
11654 sig_type
= (struct signatured_type
*) per_cu
;
11656 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11658 /* If we're using .gdb_index (includes -readnow) then
11659 per_cu->type_unit_group may not have been set up yet. */
11660 if (sig_type
->type_unit_group
== NULL
)
11661 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11662 tu_group
= sig_type
->type_unit_group
;
11664 /* If we've already processed this stmt_list there's no real need to
11665 do it again, we could fake it and just recreate the part we need
11666 (file name,index -> symtab mapping). If data shows this optimization
11667 is useful we can do it then. */
11668 first_time
= tu_group
->compunit_symtab
== NULL
;
11670 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11675 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11676 lh
= dwarf_decode_line_header (line_offset
, this);
11681 start_symtab ("", NULL
, 0);
11684 gdb_assert (tu_group
->symtabs
== NULL
);
11685 gdb_assert (m_builder
== nullptr);
11686 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11687 m_builder
.reset (new struct buildsym_compunit
11688 (COMPUNIT_OBJFILE (cust
), "",
11689 COMPUNIT_DIRNAME (cust
),
11690 compunit_language (cust
),
11696 line_header
= lh
.release ();
11697 line_header_die_owner
= die
;
11701 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11703 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11704 still initializing it, and our caller (a few levels up)
11705 process_full_type_unit still needs to know if this is the first
11708 tu_group
->num_symtabs
= line_header
->file_names
.size ();
11709 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11710 line_header
->file_names
.size ());
11712 for (i
= 0; i
< line_header
->file_names
.size (); ++i
)
11714 file_entry
&fe
= line_header
->file_names
[i
];
11716 dwarf2_start_subfile (this, fe
.name
,
11717 fe
.include_dir (line_header
));
11718 buildsym_compunit
*b
= get_builder ();
11719 if (b
->get_current_subfile ()->symtab
== NULL
)
11721 /* NOTE: start_subfile will recognize when it's been
11722 passed a file it has already seen. So we can't
11723 assume there's a simple mapping from
11724 cu->line_header->file_names to subfiles, plus
11725 cu->line_header->file_names may contain dups. */
11726 b
->get_current_subfile ()->symtab
11727 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11730 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11731 tu_group
->symtabs
[i
] = fe
.symtab
;
11736 gdb_assert (m_builder
== nullptr);
11737 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11738 m_builder
.reset (new struct buildsym_compunit
11739 (COMPUNIT_OBJFILE (cust
), "",
11740 COMPUNIT_DIRNAME (cust
),
11741 compunit_language (cust
),
11744 for (i
= 0; i
< line_header
->file_names
.size (); ++i
)
11746 file_entry
&fe
= line_header
->file_names
[i
];
11748 fe
.symtab
= tu_group
->symtabs
[i
];
11752 /* The main symtab is allocated last. Type units don't have DW_AT_name
11753 so they don't have a "real" (so to speak) symtab anyway.
11754 There is later code that will assign the main symtab to all symbols
11755 that don't have one. We need to handle the case of a symbol with a
11756 missing symtab (DW_AT_decl_file) anyway. */
11759 /* Process DW_TAG_type_unit.
11760 For TUs we want to skip the first top level sibling if it's not the
11761 actual type being defined by this TU. In this case the first top
11762 level sibling is there to provide context only. */
11765 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11767 struct die_info
*child_die
;
11769 prepare_one_comp_unit (cu
, die
, language_minimal
);
11771 /* Initialize (or reinitialize) the machinery for building symtabs.
11772 We do this before processing child DIEs, so that the line header table
11773 is available for DW_AT_decl_file. */
11774 cu
->setup_type_unit_groups (die
);
11776 if (die
->child
!= NULL
)
11778 child_die
= die
->child
;
11779 while (child_die
&& child_die
->tag
)
11781 process_die (child_die
, cu
);
11782 child_die
= sibling_die (child_die
);
11789 http://gcc.gnu.org/wiki/DebugFission
11790 http://gcc.gnu.org/wiki/DebugFissionDWP
11792 To simplify handling of both DWO files ("object" files with the DWARF info)
11793 and DWP files (a file with the DWOs packaged up into one file), we treat
11794 DWP files as having a collection of virtual DWO files. */
11797 hash_dwo_file (const void *item
)
11799 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11802 hash
= htab_hash_string (dwo_file
->dwo_name
);
11803 if (dwo_file
->comp_dir
!= NULL
)
11804 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11809 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11811 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11812 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11814 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11816 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11817 return lhs
->comp_dir
== rhs
->comp_dir
;
11818 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11821 /* Allocate a hash table for DWO files. */
11824 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11826 auto delete_dwo_file
= [] (void *item
)
11828 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11833 return htab_up (htab_create_alloc_ex (41,
11837 &objfile
->objfile_obstack
,
11838 hashtab_obstack_allocate
,
11839 dummy_obstack_deallocate
));
11842 /* Lookup DWO file DWO_NAME. */
11845 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11846 const char *dwo_name
,
11847 const char *comp_dir
)
11849 struct dwo_file find_entry
;
11852 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11853 dwarf2_per_objfile
->dwo_files
11854 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11856 find_entry
.dwo_name
= dwo_name
;
11857 find_entry
.comp_dir
= comp_dir
;
11858 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
.get (), &find_entry
,
11865 hash_dwo_unit (const void *item
)
11867 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11869 /* This drops the top 32 bits of the id, but is ok for a hash. */
11870 return dwo_unit
->signature
;
11874 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11876 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11877 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11879 /* The signature is assumed to be unique within the DWO file.
11880 So while object file CU dwo_id's always have the value zero,
11881 that's OK, assuming each object file DWO file has only one CU,
11882 and that's the rule for now. */
11883 return lhs
->signature
== rhs
->signature
;
11886 /* Allocate a hash table for DWO CUs,TUs.
11887 There is one of these tables for each of CUs,TUs for each DWO file. */
11890 allocate_dwo_unit_table (struct objfile
*objfile
)
11892 /* Start out with a pretty small number.
11893 Generally DWO files contain only one CU and maybe some TUs. */
11894 return htab_create_alloc_ex (3,
11898 &objfile
->objfile_obstack
,
11899 hashtab_obstack_allocate
,
11900 dummy_obstack_deallocate
);
11903 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11905 struct create_dwo_cu_data
11907 struct dwo_file
*dwo_file
;
11908 struct dwo_unit dwo_unit
;
11911 /* die_reader_func for create_dwo_cu. */
11914 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11915 const gdb_byte
*info_ptr
,
11916 struct die_info
*comp_unit_die
,
11920 struct dwarf2_cu
*cu
= reader
->cu
;
11921 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11922 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11923 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11924 struct dwo_file
*dwo_file
= data
->dwo_file
;
11925 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11927 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11928 if (!signature
.has_value ())
11930 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11931 " its dwo_id [in module %s]"),
11932 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11936 dwo_unit
->dwo_file
= dwo_file
;
11937 dwo_unit
->signature
= *signature
;
11938 dwo_unit
->section
= section
;
11939 dwo_unit
->sect_off
= sect_off
;
11940 dwo_unit
->length
= cu
->per_cu
->length
;
11942 if (dwarf_read_debug
)
11943 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11944 sect_offset_str (sect_off
),
11945 hex_string (dwo_unit
->signature
));
11948 /* Create the dwo_units for the CUs in a DWO_FILE.
11949 Note: This function processes DWO files only, not DWP files. */
11952 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11953 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11956 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11957 const gdb_byte
*info_ptr
, *end_ptr
;
11959 dwarf2_read_section (objfile
, §ion
);
11960 info_ptr
= section
.buffer
;
11962 if (info_ptr
== NULL
)
11965 if (dwarf_read_debug
)
11967 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11968 get_section_name (§ion
),
11969 get_section_file_name (§ion
));
11972 end_ptr
= info_ptr
+ section
.size
;
11973 while (info_ptr
< end_ptr
)
11975 struct dwarf2_per_cu_data per_cu
;
11976 struct create_dwo_cu_data create_dwo_cu_data
;
11977 struct dwo_unit
*dwo_unit
;
11979 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11981 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11982 sizeof (create_dwo_cu_data
.dwo_unit
));
11983 memset (&per_cu
, 0, sizeof (per_cu
));
11984 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11985 per_cu
.is_debug_types
= 0;
11986 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11987 per_cu
.section
= §ion
;
11988 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11990 init_cutu_and_read_dies_no_follow (
11991 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11992 info_ptr
+= per_cu
.length
;
11994 // If the unit could not be parsed, skip it.
11995 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11998 if (cus_htab
== NULL
)
11999 cus_htab
= allocate_dwo_unit_table (objfile
);
12001 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12002 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
12003 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
12004 gdb_assert (slot
!= NULL
);
12007 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
12008 sect_offset dup_sect_off
= dup_cu
->sect_off
;
12010 complaint (_("debug cu entry at offset %s is duplicate to"
12011 " the entry at offset %s, signature %s"),
12012 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
12013 hex_string (dwo_unit
->signature
));
12015 *slot
= (void *)dwo_unit
;
12019 /* DWP file .debug_{cu,tu}_index section format:
12020 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
12024 Both index sections have the same format, and serve to map a 64-bit
12025 signature to a set of section numbers. Each section begins with a header,
12026 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
12027 indexes, and a pool of 32-bit section numbers. The index sections will be
12028 aligned at 8-byte boundaries in the file.
12030 The index section header consists of:
12032 V, 32 bit version number
12034 N, 32 bit number of compilation units or type units in the index
12035 M, 32 bit number of slots in the hash table
12037 Numbers are recorded using the byte order of the application binary.
12039 The hash table begins at offset 16 in the section, and consists of an array
12040 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
12041 order of the application binary). Unused slots in the hash table are 0.
12042 (We rely on the extreme unlikeliness of a signature being exactly 0.)
12044 The parallel table begins immediately after the hash table
12045 (at offset 16 + 8 * M from the beginning of the section), and consists of an
12046 array of 32-bit indexes (using the byte order of the application binary),
12047 corresponding 1-1 with slots in the hash table. Each entry in the parallel
12048 table contains a 32-bit index into the pool of section numbers. For unused
12049 hash table slots, the corresponding entry in the parallel table will be 0.
12051 The pool of section numbers begins immediately following the hash table
12052 (at offset 16 + 12 * M from the beginning of the section). The pool of
12053 section numbers consists of an array of 32-bit words (using the byte order
12054 of the application binary). Each item in the array is indexed starting
12055 from 0. The hash table entry provides the index of the first section
12056 number in the set. Additional section numbers in the set follow, and the
12057 set is terminated by a 0 entry (section number 0 is not used in ELF).
12059 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
12060 section must be the first entry in the set, and the .debug_abbrev.dwo must
12061 be the second entry. Other members of the set may follow in any order.
12067 DWP Version 2 combines all the .debug_info, etc. sections into one,
12068 and the entries in the index tables are now offsets into these sections.
12069 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
12072 Index Section Contents:
12074 Hash Table of Signatures dwp_hash_table.hash_table
12075 Parallel Table of Indices dwp_hash_table.unit_table
12076 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
12077 Table of Section Sizes dwp_hash_table.v2.sizes
12079 The index section header consists of:
12081 V, 32 bit version number
12082 L, 32 bit number of columns in the table of section offsets
12083 N, 32 bit number of compilation units or type units in the index
12084 M, 32 bit number of slots in the hash table
12086 Numbers are recorded using the byte order of the application binary.
12088 The hash table has the same format as version 1.
12089 The parallel table of indices has the same format as version 1,
12090 except that the entries are origin-1 indices into the table of sections
12091 offsets and the table of section sizes.
12093 The table of offsets begins immediately following the parallel table
12094 (at offset 16 + 12 * M from the beginning of the section). The table is
12095 a two-dimensional array of 32-bit words (using the byte order of the
12096 application binary), with L columns and N+1 rows, in row-major order.
12097 Each row in the array is indexed starting from 0. The first row provides
12098 a key to the remaining rows: each column in this row provides an identifier
12099 for a debug section, and the offsets in the same column of subsequent rows
12100 refer to that section. The section identifiers are:
12102 DW_SECT_INFO 1 .debug_info.dwo
12103 DW_SECT_TYPES 2 .debug_types.dwo
12104 DW_SECT_ABBREV 3 .debug_abbrev.dwo
12105 DW_SECT_LINE 4 .debug_line.dwo
12106 DW_SECT_LOC 5 .debug_loc.dwo
12107 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
12108 DW_SECT_MACINFO 7 .debug_macinfo.dwo
12109 DW_SECT_MACRO 8 .debug_macro.dwo
12111 The offsets provided by the CU and TU index sections are the base offsets
12112 for the contributions made by each CU or TU to the corresponding section
12113 in the package file. Each CU and TU header contains an abbrev_offset
12114 field, used to find the abbreviations table for that CU or TU within the
12115 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
12116 be interpreted as relative to the base offset given in the index section.
12117 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
12118 should be interpreted as relative to the base offset for .debug_line.dwo,
12119 and offsets into other debug sections obtained from DWARF attributes should
12120 also be interpreted as relative to the corresponding base offset.
12122 The table of sizes begins immediately following the table of offsets.
12123 Like the table of offsets, it is a two-dimensional array of 32-bit words,
12124 with L columns and N rows, in row-major order. Each row in the array is
12125 indexed starting from 1 (row 0 is shared by the two tables).
12129 Hash table lookup is handled the same in version 1 and 2:
12131 We assume that N and M will not exceed 2^32 - 1.
12132 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12134 Given a 64-bit compilation unit signature or a type signature S, an entry
12135 in the hash table is located as follows:
12137 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12138 the low-order k bits all set to 1.
12140 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12142 3) If the hash table entry at index H matches the signature, use that
12143 entry. If the hash table entry at index H is unused (all zeroes),
12144 terminate the search: the signature is not present in the table.
12146 4) Let H = (H + H') modulo M. Repeat at Step 3.
12148 Because M > N and H' and M are relatively prime, the search is guaranteed
12149 to stop at an unused slot or find the match. */
12151 /* Create a hash table to map DWO IDs to their CU/TU entry in
12152 .debug_{info,types}.dwo in DWP_FILE.
12153 Returns NULL if there isn't one.
12154 Note: This function processes DWP files only, not DWO files. */
12156 static struct dwp_hash_table
*
12157 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12158 struct dwp_file
*dwp_file
, int is_debug_types
)
12160 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12161 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12162 const gdb_byte
*index_ptr
, *index_end
;
12163 struct dwarf2_section_info
*index
;
12164 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12165 struct dwp_hash_table
*htab
;
12167 if (is_debug_types
)
12168 index
= &dwp_file
->sections
.tu_index
;
12170 index
= &dwp_file
->sections
.cu_index
;
12172 if (dwarf2_section_empty_p (index
))
12174 dwarf2_read_section (objfile
, index
);
12176 index_ptr
= index
->buffer
;
12177 index_end
= index_ptr
+ index
->size
;
12179 version
= read_4_bytes (dbfd
, index_ptr
);
12182 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12186 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12188 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12191 if (version
!= 1 && version
!= 2)
12193 error (_("Dwarf Error: unsupported DWP file version (%s)"
12194 " [in module %s]"),
12195 pulongest (version
), dwp_file
->name
);
12197 if (nr_slots
!= (nr_slots
& -nr_slots
))
12199 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12200 " is not power of 2 [in module %s]"),
12201 pulongest (nr_slots
), dwp_file
->name
);
12204 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12205 htab
->version
= version
;
12206 htab
->nr_columns
= nr_columns
;
12207 htab
->nr_units
= nr_units
;
12208 htab
->nr_slots
= nr_slots
;
12209 htab
->hash_table
= index_ptr
;
12210 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12212 /* Exit early if the table is empty. */
12213 if (nr_slots
== 0 || nr_units
== 0
12214 || (version
== 2 && nr_columns
== 0))
12216 /* All must be zero. */
12217 if (nr_slots
!= 0 || nr_units
!= 0
12218 || (version
== 2 && nr_columns
!= 0))
12220 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
12221 " all zero [in modules %s]"),
12229 htab
->section_pool
.v1
.indices
=
12230 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12231 /* It's harder to decide whether the section is too small in v1.
12232 V1 is deprecated anyway so we punt. */
12236 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12237 int *ids
= htab
->section_pool
.v2
.section_ids
;
12238 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
12239 /* Reverse map for error checking. */
12240 int ids_seen
[DW_SECT_MAX
+ 1];
12243 if (nr_columns
< 2)
12245 error (_("Dwarf Error: bad DWP hash table, too few columns"
12246 " in section table [in module %s]"),
12249 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12251 error (_("Dwarf Error: bad DWP hash table, too many columns"
12252 " in section table [in module %s]"),
12255 memset (ids
, 255, sizeof_ids
);
12256 memset (ids_seen
, 255, sizeof (ids_seen
));
12257 for (i
= 0; i
< nr_columns
; ++i
)
12259 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12261 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12263 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12264 " in section table [in module %s]"),
12265 id
, dwp_file
->name
);
12267 if (ids_seen
[id
] != -1)
12269 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12270 " id %d in section table [in module %s]"),
12271 id
, dwp_file
->name
);
12276 /* Must have exactly one info or types section. */
12277 if (((ids_seen
[DW_SECT_INFO
] != -1)
12278 + (ids_seen
[DW_SECT_TYPES
] != -1))
12281 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12282 " DWO info/types section [in module %s]"),
12285 /* Must have an abbrev section. */
12286 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12288 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12289 " section [in module %s]"),
12292 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12293 htab
->section_pool
.v2
.sizes
=
12294 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12295 * nr_units
* nr_columns
);
12296 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12297 * nr_units
* nr_columns
))
12300 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12301 " [in module %s]"),
12309 /* Update SECTIONS with the data from SECTP.
12311 This function is like the other "locate" section routines that are
12312 passed to bfd_map_over_sections, but in this context the sections to
12313 read comes from the DWP V1 hash table, not the full ELF section table.
12315 The result is non-zero for success, or zero if an error was found. */
12318 locate_v1_virtual_dwo_sections (asection
*sectp
,
12319 struct virtual_v1_dwo_sections
*sections
)
12321 const struct dwop_section_names
*names
= &dwop_section_names
;
12323 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12325 /* There can be only one. */
12326 if (sections
->abbrev
.s
.section
!= NULL
)
12328 sections
->abbrev
.s
.section
= sectp
;
12329 sections
->abbrev
.size
= bfd_section_size (sectp
);
12331 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12332 || section_is_p (sectp
->name
, &names
->types_dwo
))
12334 /* There can be only one. */
12335 if (sections
->info_or_types
.s
.section
!= NULL
)
12337 sections
->info_or_types
.s
.section
= sectp
;
12338 sections
->info_or_types
.size
= bfd_section_size (sectp
);
12340 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12342 /* There can be only one. */
12343 if (sections
->line
.s
.section
!= NULL
)
12345 sections
->line
.s
.section
= sectp
;
12346 sections
->line
.size
= bfd_section_size (sectp
);
12348 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12350 /* There can be only one. */
12351 if (sections
->loc
.s
.section
!= NULL
)
12353 sections
->loc
.s
.section
= sectp
;
12354 sections
->loc
.size
= bfd_section_size (sectp
);
12356 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12358 /* There can be only one. */
12359 if (sections
->macinfo
.s
.section
!= NULL
)
12361 sections
->macinfo
.s
.section
= sectp
;
12362 sections
->macinfo
.size
= bfd_section_size (sectp
);
12364 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12366 /* There can be only one. */
12367 if (sections
->macro
.s
.section
!= NULL
)
12369 sections
->macro
.s
.section
= sectp
;
12370 sections
->macro
.size
= bfd_section_size (sectp
);
12372 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12374 /* There can be only one. */
12375 if (sections
->str_offsets
.s
.section
!= NULL
)
12377 sections
->str_offsets
.s
.section
= sectp
;
12378 sections
->str_offsets
.size
= bfd_section_size (sectp
);
12382 /* No other kind of section is valid. */
12389 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12390 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12391 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12392 This is for DWP version 1 files. */
12394 static struct dwo_unit
*
12395 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12396 struct dwp_file
*dwp_file
,
12397 uint32_t unit_index
,
12398 const char *comp_dir
,
12399 ULONGEST signature
, int is_debug_types
)
12401 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12402 const struct dwp_hash_table
*dwp_htab
=
12403 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12404 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12405 const char *kind
= is_debug_types
? "TU" : "CU";
12406 struct dwo_file
*dwo_file
;
12407 struct dwo_unit
*dwo_unit
;
12408 struct virtual_v1_dwo_sections sections
;
12409 void **dwo_file_slot
;
12412 gdb_assert (dwp_file
->version
== 1);
12414 if (dwarf_read_debug
)
12416 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12418 pulongest (unit_index
), hex_string (signature
),
12422 /* Fetch the sections of this DWO unit.
12423 Put a limit on the number of sections we look for so that bad data
12424 doesn't cause us to loop forever. */
12426 #define MAX_NR_V1_DWO_SECTIONS \
12427 (1 /* .debug_info or .debug_types */ \
12428 + 1 /* .debug_abbrev */ \
12429 + 1 /* .debug_line */ \
12430 + 1 /* .debug_loc */ \
12431 + 1 /* .debug_str_offsets */ \
12432 + 1 /* .debug_macro or .debug_macinfo */ \
12433 + 1 /* trailing zero */)
12435 memset (§ions
, 0, sizeof (sections
));
12437 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12440 uint32_t section_nr
=
12441 read_4_bytes (dbfd
,
12442 dwp_htab
->section_pool
.v1
.indices
12443 + (unit_index
+ i
) * sizeof (uint32_t));
12445 if (section_nr
== 0)
12447 if (section_nr
>= dwp_file
->num_sections
)
12449 error (_("Dwarf Error: bad DWP hash table, section number too large"
12450 " [in module %s]"),
12454 sectp
= dwp_file
->elf_sections
[section_nr
];
12455 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12457 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12458 " [in module %s]"),
12464 || dwarf2_section_empty_p (§ions
.info_or_types
)
12465 || dwarf2_section_empty_p (§ions
.abbrev
))
12467 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12468 " [in module %s]"),
12471 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12473 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12474 " [in module %s]"),
12478 /* It's easier for the rest of the code if we fake a struct dwo_file and
12479 have dwo_unit "live" in that. At least for now.
12481 The DWP file can be made up of a random collection of CUs and TUs.
12482 However, for each CU + set of TUs that came from the same original DWO
12483 file, we can combine them back into a virtual DWO file to save space
12484 (fewer struct dwo_file objects to allocate). Remember that for really
12485 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12487 std::string virtual_dwo_name
=
12488 string_printf ("virtual-dwo/%d-%d-%d-%d",
12489 get_section_id (§ions
.abbrev
),
12490 get_section_id (§ions
.line
),
12491 get_section_id (§ions
.loc
),
12492 get_section_id (§ions
.str_offsets
));
12493 /* Can we use an existing virtual DWO file? */
12494 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12495 virtual_dwo_name
.c_str (),
12497 /* Create one if necessary. */
12498 if (*dwo_file_slot
== NULL
)
12500 if (dwarf_read_debug
)
12502 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12503 virtual_dwo_name
.c_str ());
12505 dwo_file
= new struct dwo_file
;
12506 dwo_file
->dwo_name
= obstack_strdup (&objfile
->objfile_obstack
,
12508 dwo_file
->comp_dir
= comp_dir
;
12509 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12510 dwo_file
->sections
.line
= sections
.line
;
12511 dwo_file
->sections
.loc
= sections
.loc
;
12512 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12513 dwo_file
->sections
.macro
= sections
.macro
;
12514 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12515 /* The "str" section is global to the entire DWP file. */
12516 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12517 /* The info or types section is assigned below to dwo_unit,
12518 there's no need to record it in dwo_file.
12519 Also, we can't simply record type sections in dwo_file because
12520 we record a pointer into the vector in dwo_unit. As we collect more
12521 types we'll grow the vector and eventually have to reallocate space
12522 for it, invalidating all copies of pointers into the previous
12524 *dwo_file_slot
= dwo_file
;
12528 if (dwarf_read_debug
)
12530 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12531 virtual_dwo_name
.c_str ());
12533 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12536 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12537 dwo_unit
->dwo_file
= dwo_file
;
12538 dwo_unit
->signature
= signature
;
12539 dwo_unit
->section
=
12540 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12541 *dwo_unit
->section
= sections
.info_or_types
;
12542 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12547 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12548 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12549 piece within that section used by a TU/CU, return a virtual section
12550 of just that piece. */
12552 static struct dwarf2_section_info
12553 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12554 struct dwarf2_section_info
*section
,
12555 bfd_size_type offset
, bfd_size_type size
)
12557 struct dwarf2_section_info result
;
12560 gdb_assert (section
!= NULL
);
12561 gdb_assert (!section
->is_virtual
);
12563 memset (&result
, 0, sizeof (result
));
12564 result
.s
.containing_section
= section
;
12565 result
.is_virtual
= true;
12570 sectp
= get_section_bfd_section (section
);
12572 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12573 bounds of the real section. This is a pretty-rare event, so just
12574 flag an error (easier) instead of a warning and trying to cope. */
12576 || offset
+ size
> bfd_section_size (sectp
))
12578 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12579 " in section %s [in module %s]"),
12580 sectp
? bfd_section_name (sectp
) : "<unknown>",
12581 objfile_name (dwarf2_per_objfile
->objfile
));
12584 result
.virtual_offset
= offset
;
12585 result
.size
= size
;
12589 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12590 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12591 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12592 This is for DWP version 2 files. */
12594 static struct dwo_unit
*
12595 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12596 struct dwp_file
*dwp_file
,
12597 uint32_t unit_index
,
12598 const char *comp_dir
,
12599 ULONGEST signature
, int is_debug_types
)
12601 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12602 const struct dwp_hash_table
*dwp_htab
=
12603 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12604 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12605 const char *kind
= is_debug_types
? "TU" : "CU";
12606 struct dwo_file
*dwo_file
;
12607 struct dwo_unit
*dwo_unit
;
12608 struct virtual_v2_dwo_sections sections
;
12609 void **dwo_file_slot
;
12612 gdb_assert (dwp_file
->version
== 2);
12614 if (dwarf_read_debug
)
12616 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12618 pulongest (unit_index
), hex_string (signature
),
12622 /* Fetch the section offsets of this DWO unit. */
12624 memset (§ions
, 0, sizeof (sections
));
12626 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12628 uint32_t offset
= read_4_bytes (dbfd
,
12629 dwp_htab
->section_pool
.v2
.offsets
12630 + (((unit_index
- 1) * dwp_htab
->nr_columns
12632 * sizeof (uint32_t)));
12633 uint32_t size
= read_4_bytes (dbfd
,
12634 dwp_htab
->section_pool
.v2
.sizes
12635 + (((unit_index
- 1) * dwp_htab
->nr_columns
12637 * sizeof (uint32_t)));
12639 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12642 case DW_SECT_TYPES
:
12643 sections
.info_or_types_offset
= offset
;
12644 sections
.info_or_types_size
= size
;
12646 case DW_SECT_ABBREV
:
12647 sections
.abbrev_offset
= offset
;
12648 sections
.abbrev_size
= size
;
12651 sections
.line_offset
= offset
;
12652 sections
.line_size
= size
;
12655 sections
.loc_offset
= offset
;
12656 sections
.loc_size
= size
;
12658 case DW_SECT_STR_OFFSETS
:
12659 sections
.str_offsets_offset
= offset
;
12660 sections
.str_offsets_size
= size
;
12662 case DW_SECT_MACINFO
:
12663 sections
.macinfo_offset
= offset
;
12664 sections
.macinfo_size
= size
;
12666 case DW_SECT_MACRO
:
12667 sections
.macro_offset
= offset
;
12668 sections
.macro_size
= size
;
12673 /* It's easier for the rest of the code if we fake a struct dwo_file and
12674 have dwo_unit "live" in that. At least for now.
12676 The DWP file can be made up of a random collection of CUs and TUs.
12677 However, for each CU + set of TUs that came from the same original DWO
12678 file, we can combine them back into a virtual DWO file to save space
12679 (fewer struct dwo_file objects to allocate). Remember that for really
12680 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12682 std::string virtual_dwo_name
=
12683 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12684 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12685 (long) (sections
.line_size
? sections
.line_offset
: 0),
12686 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12687 (long) (sections
.str_offsets_size
12688 ? sections
.str_offsets_offset
: 0));
12689 /* Can we use an existing virtual DWO file? */
12690 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12691 virtual_dwo_name
.c_str (),
12693 /* Create one if necessary. */
12694 if (*dwo_file_slot
== NULL
)
12696 if (dwarf_read_debug
)
12698 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12699 virtual_dwo_name
.c_str ());
12701 dwo_file
= new struct dwo_file
;
12702 dwo_file
->dwo_name
= obstack_strdup (&objfile
->objfile_obstack
,
12704 dwo_file
->comp_dir
= comp_dir
;
12705 dwo_file
->sections
.abbrev
=
12706 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12707 sections
.abbrev_offset
, sections
.abbrev_size
);
12708 dwo_file
->sections
.line
=
12709 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12710 sections
.line_offset
, sections
.line_size
);
12711 dwo_file
->sections
.loc
=
12712 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12713 sections
.loc_offset
, sections
.loc_size
);
12714 dwo_file
->sections
.macinfo
=
12715 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12716 sections
.macinfo_offset
, sections
.macinfo_size
);
12717 dwo_file
->sections
.macro
=
12718 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12719 sections
.macro_offset
, sections
.macro_size
);
12720 dwo_file
->sections
.str_offsets
=
12721 create_dwp_v2_section (dwarf2_per_objfile
,
12722 &dwp_file
->sections
.str_offsets
,
12723 sections
.str_offsets_offset
,
12724 sections
.str_offsets_size
);
12725 /* The "str" section is global to the entire DWP file. */
12726 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12727 /* The info or types section is assigned below to dwo_unit,
12728 there's no need to record it in dwo_file.
12729 Also, we can't simply record type sections in dwo_file because
12730 we record a pointer into the vector in dwo_unit. As we collect more
12731 types we'll grow the vector and eventually have to reallocate space
12732 for it, invalidating all copies of pointers into the previous
12734 *dwo_file_slot
= dwo_file
;
12738 if (dwarf_read_debug
)
12740 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12741 virtual_dwo_name
.c_str ());
12743 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12746 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12747 dwo_unit
->dwo_file
= dwo_file
;
12748 dwo_unit
->signature
= signature
;
12749 dwo_unit
->section
=
12750 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12751 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12753 ? &dwp_file
->sections
.types
12754 : &dwp_file
->sections
.info
,
12755 sections
.info_or_types_offset
,
12756 sections
.info_or_types_size
);
12757 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12762 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12763 Returns NULL if the signature isn't found. */
12765 static struct dwo_unit
*
12766 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12767 struct dwp_file
*dwp_file
, const char *comp_dir
,
12768 ULONGEST signature
, int is_debug_types
)
12770 const struct dwp_hash_table
*dwp_htab
=
12771 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12772 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12773 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12774 uint32_t hash
= signature
& mask
;
12775 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12778 struct dwo_unit find_dwo_cu
;
12780 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12781 find_dwo_cu
.signature
= signature
;
12782 slot
= htab_find_slot (is_debug_types
12783 ? dwp_file
->loaded_tus
12784 : dwp_file
->loaded_cus
,
12785 &find_dwo_cu
, INSERT
);
12788 return (struct dwo_unit
*) *slot
;
12790 /* Use a for loop so that we don't loop forever on bad debug info. */
12791 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12793 ULONGEST signature_in_table
;
12795 signature_in_table
=
12796 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12797 if (signature_in_table
== signature
)
12799 uint32_t unit_index
=
12800 read_4_bytes (dbfd
,
12801 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12803 if (dwp_file
->version
== 1)
12805 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12806 dwp_file
, unit_index
,
12807 comp_dir
, signature
,
12812 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12813 dwp_file
, unit_index
,
12814 comp_dir
, signature
,
12817 return (struct dwo_unit
*) *slot
;
12819 if (signature_in_table
== 0)
12821 hash
= (hash
+ hash2
) & mask
;
12824 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12825 " [in module %s]"),
12829 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12830 Open the file specified by FILE_NAME and hand it off to BFD for
12831 preliminary analysis. Return a newly initialized bfd *, which
12832 includes a canonicalized copy of FILE_NAME.
12833 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12834 SEARCH_CWD is true if the current directory is to be searched.
12835 It will be searched before debug-file-directory.
12836 If successful, the file is added to the bfd include table of the
12837 objfile's bfd (see gdb_bfd_record_inclusion).
12838 If unable to find/open the file, return NULL.
12839 NOTE: This function is derived from symfile_bfd_open. */
12841 static gdb_bfd_ref_ptr
12842 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12843 const char *file_name
, int is_dwp
, int search_cwd
)
12846 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12847 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12848 to debug_file_directory. */
12849 const char *search_path
;
12850 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12852 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12855 if (*debug_file_directory
!= '\0')
12857 search_path_holder
.reset (concat (".", dirname_separator_string
,
12858 debug_file_directory
,
12860 search_path
= search_path_holder
.get ();
12866 search_path
= debug_file_directory
;
12868 openp_flags flags
= OPF_RETURN_REALPATH
;
12870 flags
|= OPF_SEARCH_IN_PATH
;
12872 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12873 desc
= openp (search_path
, flags
, file_name
,
12874 O_RDONLY
| O_BINARY
, &absolute_name
);
12878 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12880 if (sym_bfd
== NULL
)
12882 bfd_set_cacheable (sym_bfd
.get (), 1);
12884 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12887 /* Success. Record the bfd as having been included by the objfile's bfd.
12888 This is important because things like demangled_names_hash lives in the
12889 objfile's per_bfd space and may have references to things like symbol
12890 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12891 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12896 /* Try to open DWO file FILE_NAME.
12897 COMP_DIR is the DW_AT_comp_dir attribute.
12898 The result is the bfd handle of the file.
12899 If there is a problem finding or opening the file, return NULL.
12900 Upon success, the canonicalized path of the file is stored in the bfd,
12901 same as symfile_bfd_open. */
12903 static gdb_bfd_ref_ptr
12904 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12905 const char *file_name
, const char *comp_dir
)
12907 if (IS_ABSOLUTE_PATH (file_name
))
12908 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12909 0 /*is_dwp*/, 0 /*search_cwd*/);
12911 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12913 if (comp_dir
!= NULL
)
12915 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12916 file_name
, (char *) NULL
);
12918 /* NOTE: If comp_dir is a relative path, this will also try the
12919 search path, which seems useful. */
12920 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12923 1 /*search_cwd*/));
12924 xfree (path_to_try
);
12929 /* That didn't work, try debug-file-directory, which, despite its name,
12930 is a list of paths. */
12932 if (*debug_file_directory
== '\0')
12935 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12936 0 /*is_dwp*/, 1 /*search_cwd*/);
12939 /* This function is mapped across the sections and remembers the offset and
12940 size of each of the DWO debugging sections we are interested in. */
12943 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12945 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12946 const struct dwop_section_names
*names
= &dwop_section_names
;
12948 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12950 dwo_sections
->abbrev
.s
.section
= sectp
;
12951 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12953 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12955 dwo_sections
->info
.s
.section
= sectp
;
12956 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12958 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12960 dwo_sections
->line
.s
.section
= sectp
;
12961 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12963 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12965 dwo_sections
->loc
.s
.section
= sectp
;
12966 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12968 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12970 dwo_sections
->macinfo
.s
.section
= sectp
;
12971 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12973 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12975 dwo_sections
->macro
.s
.section
= sectp
;
12976 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12978 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12980 dwo_sections
->str
.s
.section
= sectp
;
12981 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12983 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12985 dwo_sections
->str_offsets
.s
.section
= sectp
;
12986 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12988 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12990 struct dwarf2_section_info type_section
;
12992 memset (&type_section
, 0, sizeof (type_section
));
12993 type_section
.s
.section
= sectp
;
12994 type_section
.size
= bfd_section_size (sectp
);
12995 dwo_sections
->types
.push_back (type_section
);
12999 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
13000 by PER_CU. This is for the non-DWP case.
13001 The result is NULL if DWO_NAME can't be found. */
13003 static struct dwo_file
*
13004 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
13005 const char *dwo_name
, const char *comp_dir
)
13007 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
13009 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
13012 if (dwarf_read_debug
)
13013 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
13017 dwo_file_up
dwo_file (new struct dwo_file
);
13018 dwo_file
->dwo_name
= dwo_name
;
13019 dwo_file
->comp_dir
= comp_dir
;
13020 dwo_file
->dbfd
= std::move (dbfd
);
13022 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
13023 &dwo_file
->sections
);
13025 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
13028 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
13029 dwo_file
->sections
.types
, dwo_file
->tus
);
13031 if (dwarf_read_debug
)
13032 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
13034 return dwo_file
.release ();
13037 /* This function is mapped across the sections and remembers the offset and
13038 size of each of the DWP debugging sections common to version 1 and 2 that
13039 we are interested in. */
13042 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
13043 void *dwp_file_ptr
)
13045 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13046 const struct dwop_section_names
*names
= &dwop_section_names
;
13047 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13049 /* Record the ELF section number for later lookup: this is what the
13050 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13051 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13052 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13054 /* Look for specific sections that we need. */
13055 if (section_is_p (sectp
->name
, &names
->str_dwo
))
13057 dwp_file
->sections
.str
.s
.section
= sectp
;
13058 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
13060 else if (section_is_p (sectp
->name
, &names
->cu_index
))
13062 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
13063 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
13065 else if (section_is_p (sectp
->name
, &names
->tu_index
))
13067 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
13068 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
13072 /* This function is mapped across the sections and remembers the offset and
13073 size of each of the DWP version 2 debugging sections that we are interested
13074 in. This is split into a separate function because we don't know if we
13075 have version 1 or 2 until we parse the cu_index/tu_index sections. */
13078 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
13080 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13081 const struct dwop_section_names
*names
= &dwop_section_names
;
13082 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13084 /* Record the ELF section number for later lookup: this is what the
13085 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13086 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13087 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13089 /* Look for specific sections that we need. */
13090 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
13092 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
13093 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
13095 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
13097 dwp_file
->sections
.info
.s
.section
= sectp
;
13098 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
13100 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
13102 dwp_file
->sections
.line
.s
.section
= sectp
;
13103 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
13105 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
13107 dwp_file
->sections
.loc
.s
.section
= sectp
;
13108 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
13110 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
13112 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
13113 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
13115 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13117 dwp_file
->sections
.macro
.s
.section
= sectp
;
13118 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
13120 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13122 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13123 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
13125 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13127 dwp_file
->sections
.types
.s
.section
= sectp
;
13128 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
13132 /* Hash function for dwp_file loaded CUs/TUs. */
13135 hash_dwp_loaded_cutus (const void *item
)
13137 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13139 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13140 return dwo_unit
->signature
;
13143 /* Equality function for dwp_file loaded CUs/TUs. */
13146 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13148 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13149 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13151 return dua
->signature
== dub
->signature
;
13154 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13157 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13159 return htab_create_alloc_ex (3,
13160 hash_dwp_loaded_cutus
,
13161 eq_dwp_loaded_cutus
,
13163 &objfile
->objfile_obstack
,
13164 hashtab_obstack_allocate
,
13165 dummy_obstack_deallocate
);
13168 /* Try to open DWP file FILE_NAME.
13169 The result is the bfd handle of the file.
13170 If there is a problem finding or opening the file, return NULL.
13171 Upon success, the canonicalized path of the file is stored in the bfd,
13172 same as symfile_bfd_open. */
13174 static gdb_bfd_ref_ptr
13175 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13176 const char *file_name
)
13178 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13180 1 /*search_cwd*/));
13184 /* Work around upstream bug 15652.
13185 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13186 [Whether that's a "bug" is debatable, but it is getting in our way.]
13187 We have no real idea where the dwp file is, because gdb's realpath-ing
13188 of the executable's path may have discarded the needed info.
13189 [IWBN if the dwp file name was recorded in the executable, akin to
13190 .gnu_debuglink, but that doesn't exist yet.]
13191 Strip the directory from FILE_NAME and search again. */
13192 if (*debug_file_directory
!= '\0')
13194 /* Don't implicitly search the current directory here.
13195 If the user wants to search "." to handle this case,
13196 it must be added to debug-file-directory. */
13197 return try_open_dwop_file (dwarf2_per_objfile
,
13198 lbasename (file_name
), 1 /*is_dwp*/,
13205 /* Initialize the use of the DWP file for the current objfile.
13206 By convention the name of the DWP file is ${objfile}.dwp.
13207 The result is NULL if it can't be found. */
13209 static std::unique_ptr
<struct dwp_file
>
13210 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13212 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13214 /* Try to find first .dwp for the binary file before any symbolic links
13217 /* If the objfile is a debug file, find the name of the real binary
13218 file and get the name of dwp file from there. */
13219 std::string dwp_name
;
13220 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13222 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13223 const char *backlink_basename
= lbasename (backlink
->original_name
);
13225 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13228 dwp_name
= objfile
->original_name
;
13230 dwp_name
+= ".dwp";
13232 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13234 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13236 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13237 dwp_name
= objfile_name (objfile
);
13238 dwp_name
+= ".dwp";
13239 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13244 if (dwarf_read_debug
)
13245 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13246 return std::unique_ptr
<dwp_file
> ();
13249 const char *name
= bfd_get_filename (dbfd
.get ());
13250 std::unique_ptr
<struct dwp_file
> dwp_file
13251 (new struct dwp_file (name
, std::move (dbfd
)));
13253 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
13254 dwp_file
->elf_sections
=
13255 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13256 dwp_file
->num_sections
, asection
*);
13258 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13259 dwarf2_locate_common_dwp_sections
,
13262 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13265 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13268 /* The DWP file version is stored in the hash table. Oh well. */
13269 if (dwp_file
->cus
&& dwp_file
->tus
13270 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13272 /* Technically speaking, we should try to limp along, but this is
13273 pretty bizarre. We use pulongest here because that's the established
13274 portability solution (e.g, we cannot use %u for uint32_t). */
13275 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13276 " TU version %s [in DWP file %s]"),
13277 pulongest (dwp_file
->cus
->version
),
13278 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13282 dwp_file
->version
= dwp_file
->cus
->version
;
13283 else if (dwp_file
->tus
)
13284 dwp_file
->version
= dwp_file
->tus
->version
;
13286 dwp_file
->version
= 2;
13288 if (dwp_file
->version
== 2)
13289 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13290 dwarf2_locate_v2_dwp_sections
,
13293 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13294 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13296 if (dwarf_read_debug
)
13298 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13299 fprintf_unfiltered (gdb_stdlog
,
13300 " %s CUs, %s TUs\n",
13301 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13302 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13308 /* Wrapper around open_and_init_dwp_file, only open it once. */
13310 static struct dwp_file
*
13311 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13313 if (! dwarf2_per_objfile
->dwp_checked
)
13315 dwarf2_per_objfile
->dwp_file
13316 = open_and_init_dwp_file (dwarf2_per_objfile
);
13317 dwarf2_per_objfile
->dwp_checked
= 1;
13319 return dwarf2_per_objfile
->dwp_file
.get ();
13322 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13323 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13324 or in the DWP file for the objfile, referenced by THIS_UNIT.
13325 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13326 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13328 This is called, for example, when wanting to read a variable with a
13329 complex location. Therefore we don't want to do file i/o for every call.
13330 Therefore we don't want to look for a DWO file on every call.
13331 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13332 then we check if we've already seen DWO_NAME, and only THEN do we check
13335 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13336 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13338 static struct dwo_unit
*
13339 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13340 const char *dwo_name
, const char *comp_dir
,
13341 ULONGEST signature
, int is_debug_types
)
13343 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13344 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13345 const char *kind
= is_debug_types
? "TU" : "CU";
13346 void **dwo_file_slot
;
13347 struct dwo_file
*dwo_file
;
13348 struct dwp_file
*dwp_file
;
13350 /* First see if there's a DWP file.
13351 If we have a DWP file but didn't find the DWO inside it, don't
13352 look for the original DWO file. It makes gdb behave differently
13353 depending on whether one is debugging in the build tree. */
13355 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13356 if (dwp_file
!= NULL
)
13358 const struct dwp_hash_table
*dwp_htab
=
13359 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13361 if (dwp_htab
!= NULL
)
13363 struct dwo_unit
*dwo_cutu
=
13364 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13365 signature
, is_debug_types
);
13367 if (dwo_cutu
!= NULL
)
13369 if (dwarf_read_debug
)
13371 fprintf_unfiltered (gdb_stdlog
,
13372 "Virtual DWO %s %s found: @%s\n",
13373 kind
, hex_string (signature
),
13374 host_address_to_string (dwo_cutu
));
13382 /* No DWP file, look for the DWO file. */
13384 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13385 dwo_name
, comp_dir
);
13386 if (*dwo_file_slot
== NULL
)
13388 /* Read in the file and build a table of the CUs/TUs it contains. */
13389 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13391 /* NOTE: This will be NULL if unable to open the file. */
13392 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13394 if (dwo_file
!= NULL
)
13396 struct dwo_unit
*dwo_cutu
= NULL
;
13398 if (is_debug_types
&& dwo_file
->tus
)
13400 struct dwo_unit find_dwo_cutu
;
13402 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13403 find_dwo_cutu
.signature
= signature
;
13405 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13407 else if (!is_debug_types
&& dwo_file
->cus
)
13409 struct dwo_unit find_dwo_cutu
;
13411 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13412 find_dwo_cutu
.signature
= signature
;
13413 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13417 if (dwo_cutu
!= NULL
)
13419 if (dwarf_read_debug
)
13421 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13422 kind
, dwo_name
, hex_string (signature
),
13423 host_address_to_string (dwo_cutu
));
13430 /* We didn't find it. This could mean a dwo_id mismatch, or
13431 someone deleted the DWO/DWP file, or the search path isn't set up
13432 correctly to find the file. */
13434 if (dwarf_read_debug
)
13436 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13437 kind
, dwo_name
, hex_string (signature
));
13440 /* This is a warning and not a complaint because it can be caused by
13441 pilot error (e.g., user accidentally deleting the DWO). */
13443 /* Print the name of the DWP file if we looked there, helps the user
13444 better diagnose the problem. */
13445 std::string dwp_text
;
13447 if (dwp_file
!= NULL
)
13448 dwp_text
= string_printf (" [in DWP file %s]",
13449 lbasename (dwp_file
->name
));
13451 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13452 " [in module %s]"),
13453 kind
, dwo_name
, hex_string (signature
),
13455 this_unit
->is_debug_types
? "TU" : "CU",
13456 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13461 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13462 See lookup_dwo_cutu_unit for details. */
13464 static struct dwo_unit
*
13465 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13466 const char *dwo_name
, const char *comp_dir
,
13467 ULONGEST signature
)
13469 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13472 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13473 See lookup_dwo_cutu_unit for details. */
13475 static struct dwo_unit
*
13476 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13477 const char *dwo_name
, const char *comp_dir
)
13479 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13482 /* Traversal function for queue_and_load_all_dwo_tus. */
13485 queue_and_load_dwo_tu (void **slot
, void *info
)
13487 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13488 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13489 ULONGEST signature
= dwo_unit
->signature
;
13490 struct signatured_type
*sig_type
=
13491 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13493 if (sig_type
!= NULL
)
13495 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13497 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13498 a real dependency of PER_CU on SIG_TYPE. That is detected later
13499 while processing PER_CU. */
13500 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13501 load_full_type_unit (sig_cu
);
13502 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13508 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13509 The DWO may have the only definition of the type, though it may not be
13510 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13511 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13514 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13516 struct dwo_unit
*dwo_unit
;
13517 struct dwo_file
*dwo_file
;
13519 gdb_assert (!per_cu
->is_debug_types
);
13520 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13521 gdb_assert (per_cu
->cu
!= NULL
);
13523 dwo_unit
= per_cu
->cu
->dwo_unit
;
13524 gdb_assert (dwo_unit
!= NULL
);
13526 dwo_file
= dwo_unit
->dwo_file
;
13527 if (dwo_file
->tus
!= NULL
)
13528 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13531 /* Read in various DIEs. */
13533 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13534 Inherit only the children of the DW_AT_abstract_origin DIE not being
13535 already referenced by DW_AT_abstract_origin from the children of the
13539 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13541 struct die_info
*child_die
;
13542 sect_offset
*offsetp
;
13543 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13544 struct die_info
*origin_die
;
13545 /* Iterator of the ORIGIN_DIE children. */
13546 struct die_info
*origin_child_die
;
13547 struct attribute
*attr
;
13548 struct dwarf2_cu
*origin_cu
;
13549 struct pending
**origin_previous_list_in_scope
;
13551 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13555 /* Note that following die references may follow to a die in a
13559 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13561 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13563 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13564 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13566 if (die
->tag
!= origin_die
->tag
13567 && !(die
->tag
== DW_TAG_inlined_subroutine
13568 && origin_die
->tag
== DW_TAG_subprogram
))
13569 complaint (_("DIE %s and its abstract origin %s have different tags"),
13570 sect_offset_str (die
->sect_off
),
13571 sect_offset_str (origin_die
->sect_off
));
13573 std::vector
<sect_offset
> offsets
;
13575 for (child_die
= die
->child
;
13576 child_die
&& child_die
->tag
;
13577 child_die
= sibling_die (child_die
))
13579 struct die_info
*child_origin_die
;
13580 struct dwarf2_cu
*child_origin_cu
;
13582 /* We are trying to process concrete instance entries:
13583 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13584 it's not relevant to our analysis here. i.e. detecting DIEs that are
13585 present in the abstract instance but not referenced in the concrete
13587 if (child_die
->tag
== DW_TAG_call_site
13588 || child_die
->tag
== DW_TAG_GNU_call_site
)
13591 /* For each CHILD_DIE, find the corresponding child of
13592 ORIGIN_DIE. If there is more than one layer of
13593 DW_AT_abstract_origin, follow them all; there shouldn't be,
13594 but GCC versions at least through 4.4 generate this (GCC PR
13596 child_origin_die
= child_die
;
13597 child_origin_cu
= cu
;
13600 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13604 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13608 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13609 counterpart may exist. */
13610 if (child_origin_die
!= child_die
)
13612 if (child_die
->tag
!= child_origin_die
->tag
13613 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13614 && child_origin_die
->tag
== DW_TAG_subprogram
))
13615 complaint (_("Child DIE %s and its abstract origin %s have "
13617 sect_offset_str (child_die
->sect_off
),
13618 sect_offset_str (child_origin_die
->sect_off
));
13619 if (child_origin_die
->parent
!= origin_die
)
13620 complaint (_("Child DIE %s and its abstract origin %s have "
13621 "different parents"),
13622 sect_offset_str (child_die
->sect_off
),
13623 sect_offset_str (child_origin_die
->sect_off
));
13625 offsets
.push_back (child_origin_die
->sect_off
);
13628 std::sort (offsets
.begin (), offsets
.end ());
13629 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13630 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13631 if (offsetp
[-1] == *offsetp
)
13632 complaint (_("Multiple children of DIE %s refer "
13633 "to DIE %s as their abstract origin"),
13634 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13636 offsetp
= offsets
.data ();
13637 origin_child_die
= origin_die
->child
;
13638 while (origin_child_die
&& origin_child_die
->tag
)
13640 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13641 while (offsetp
< offsets_end
13642 && *offsetp
< origin_child_die
->sect_off
)
13644 if (offsetp
>= offsets_end
13645 || *offsetp
> origin_child_die
->sect_off
)
13647 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13648 Check whether we're already processing ORIGIN_CHILD_DIE.
13649 This can happen with mutually referenced abstract_origins.
13651 if (!origin_child_die
->in_process
)
13652 process_die (origin_child_die
, origin_cu
);
13654 origin_child_die
= sibling_die (origin_child_die
);
13656 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13660 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13662 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13663 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13664 struct context_stack
*newobj
;
13667 struct die_info
*child_die
;
13668 struct attribute
*attr
, *call_line
, *call_file
;
13670 CORE_ADDR baseaddr
;
13671 struct block
*block
;
13672 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13673 std::vector
<struct symbol
*> template_args
;
13674 struct template_symbol
*templ_func
= NULL
;
13678 /* If we do not have call site information, we can't show the
13679 caller of this inlined function. That's too confusing, so
13680 only use the scope for local variables. */
13681 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13682 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13683 if (call_line
== NULL
|| call_file
== NULL
)
13685 read_lexical_block_scope (die
, cu
);
13690 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13692 name
= dwarf2_name (die
, cu
);
13694 /* Ignore functions with missing or empty names. These are actually
13695 illegal according to the DWARF standard. */
13698 complaint (_("missing name for subprogram DIE at %s"),
13699 sect_offset_str (die
->sect_off
));
13703 /* Ignore functions with missing or invalid low and high pc attributes. */
13704 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13705 <= PC_BOUNDS_INVALID
)
13707 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13708 if (!attr
|| !DW_UNSND (attr
))
13709 complaint (_("cannot get low and high bounds "
13710 "for subprogram DIE at %s"),
13711 sect_offset_str (die
->sect_off
));
13715 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13716 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13718 /* If we have any template arguments, then we must allocate a
13719 different sort of symbol. */
13720 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13722 if (child_die
->tag
== DW_TAG_template_type_param
13723 || child_die
->tag
== DW_TAG_template_value_param
)
13725 templ_func
= allocate_template_symbol (objfile
);
13726 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13731 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13732 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13733 (struct symbol
*) templ_func
);
13735 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13736 set_objfile_main_name (objfile
, SYMBOL_LINKAGE_NAME (newobj
->name
),
13739 /* If there is a location expression for DW_AT_frame_base, record
13741 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13743 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13745 /* If there is a location for the static link, record it. */
13746 newobj
->static_link
= NULL
;
13747 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13750 newobj
->static_link
13751 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13752 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13753 dwarf2_per_cu_addr_type (cu
->per_cu
));
13756 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13758 if (die
->child
!= NULL
)
13760 child_die
= die
->child
;
13761 while (child_die
&& child_die
->tag
)
13763 if (child_die
->tag
== DW_TAG_template_type_param
13764 || child_die
->tag
== DW_TAG_template_value_param
)
13766 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13769 template_args
.push_back (arg
);
13772 process_die (child_die
, cu
);
13773 child_die
= sibling_die (child_die
);
13777 inherit_abstract_dies (die
, cu
);
13779 /* If we have a DW_AT_specification, we might need to import using
13780 directives from the context of the specification DIE. See the
13781 comment in determine_prefix. */
13782 if (cu
->language
== language_cplus
13783 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13785 struct dwarf2_cu
*spec_cu
= cu
;
13786 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13790 child_die
= spec_die
->child
;
13791 while (child_die
&& child_die
->tag
)
13793 if (child_die
->tag
== DW_TAG_imported_module
)
13794 process_die (child_die
, spec_cu
);
13795 child_die
= sibling_die (child_die
);
13798 /* In some cases, GCC generates specification DIEs that
13799 themselves contain DW_AT_specification attributes. */
13800 spec_die
= die_specification (spec_die
, &spec_cu
);
13804 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13805 /* Make a block for the local symbols within. */
13806 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13807 cstk
.static_link
, lowpc
, highpc
);
13809 /* For C++, set the block's scope. */
13810 if ((cu
->language
== language_cplus
13811 || cu
->language
== language_fortran
13812 || cu
->language
== language_d
13813 || cu
->language
== language_rust
)
13814 && cu
->processing_has_namespace_info
)
13815 block_set_scope (block
, determine_prefix (die
, cu
),
13816 &objfile
->objfile_obstack
);
13818 /* If we have address ranges, record them. */
13819 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13821 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13823 /* Attach template arguments to function. */
13824 if (!template_args
.empty ())
13826 gdb_assert (templ_func
!= NULL
);
13828 templ_func
->n_template_arguments
= template_args
.size ();
13829 templ_func
->template_arguments
13830 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13831 templ_func
->n_template_arguments
);
13832 memcpy (templ_func
->template_arguments
,
13833 template_args
.data (),
13834 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13836 /* Make sure that the symtab is set on the new symbols. Even
13837 though they don't appear in this symtab directly, other parts
13838 of gdb assume that symbols do, and this is reasonably
13840 for (symbol
*sym
: template_args
)
13841 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13844 /* In C++, we can have functions nested inside functions (e.g., when
13845 a function declares a class that has methods). This means that
13846 when we finish processing a function scope, we may need to go
13847 back to building a containing block's symbol lists. */
13848 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13849 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13851 /* If we've finished processing a top-level function, subsequent
13852 symbols go in the file symbol list. */
13853 if (cu
->get_builder ()->outermost_context_p ())
13854 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13857 /* Process all the DIES contained within a lexical block scope. Start
13858 a new scope, process the dies, and then close the scope. */
13861 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13863 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13864 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13865 CORE_ADDR lowpc
, highpc
;
13866 struct die_info
*child_die
;
13867 CORE_ADDR baseaddr
;
13869 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13871 /* Ignore blocks with missing or invalid low and high pc attributes. */
13872 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13873 as multiple lexical blocks? Handling children in a sane way would
13874 be nasty. Might be easier to properly extend generic blocks to
13875 describe ranges. */
13876 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13878 case PC_BOUNDS_NOT_PRESENT
:
13879 /* DW_TAG_lexical_block has no attributes, process its children as if
13880 there was no wrapping by that DW_TAG_lexical_block.
13881 GCC does no longer produces such DWARF since GCC r224161. */
13882 for (child_die
= die
->child
;
13883 child_die
!= NULL
&& child_die
->tag
;
13884 child_die
= sibling_die (child_die
))
13885 process_die (child_die
, cu
);
13887 case PC_BOUNDS_INVALID
:
13890 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13891 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13893 cu
->get_builder ()->push_context (0, lowpc
);
13894 if (die
->child
!= NULL
)
13896 child_die
= die
->child
;
13897 while (child_die
&& child_die
->tag
)
13899 process_die (child_die
, cu
);
13900 child_die
= sibling_die (child_die
);
13903 inherit_abstract_dies (die
, cu
);
13904 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13906 if (*cu
->get_builder ()->get_local_symbols () != NULL
13907 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13909 struct block
*block
13910 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13911 cstk
.start_addr
, highpc
);
13913 /* Note that recording ranges after traversing children, as we
13914 do here, means that recording a parent's ranges entails
13915 walking across all its children's ranges as they appear in
13916 the address map, which is quadratic behavior.
13918 It would be nicer to record the parent's ranges before
13919 traversing its children, simply overriding whatever you find
13920 there. But since we don't even decide whether to create a
13921 block until after we've traversed its children, that's hard
13923 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13925 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13926 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13929 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13932 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13934 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13935 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13936 CORE_ADDR pc
, baseaddr
;
13937 struct attribute
*attr
;
13938 struct call_site
*call_site
, call_site_local
;
13941 struct die_info
*child_die
;
13943 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13945 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13948 /* This was a pre-DWARF-5 GNU extension alias
13949 for DW_AT_call_return_pc. */
13950 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13954 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13955 "DIE %s [in module %s]"),
13956 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13959 pc
= attr_value_as_address (attr
) + baseaddr
;
13960 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13962 if (cu
->call_site_htab
== NULL
)
13963 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13964 NULL
, &objfile
->objfile_obstack
,
13965 hashtab_obstack_allocate
, NULL
);
13966 call_site_local
.pc
= pc
;
13967 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13970 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13971 "DIE %s [in module %s]"),
13972 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13973 objfile_name (objfile
));
13977 /* Count parameters at the caller. */
13980 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13981 child_die
= sibling_die (child_die
))
13983 if (child_die
->tag
!= DW_TAG_call_site_parameter
13984 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13986 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13987 "DW_TAG_call_site child DIE %s [in module %s]"),
13988 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13989 objfile_name (objfile
));
13997 = ((struct call_site
*)
13998 obstack_alloc (&objfile
->objfile_obstack
,
13999 sizeof (*call_site
)
14000 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
14002 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
14003 call_site
->pc
= pc
;
14005 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
14006 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
14008 struct die_info
*func_die
;
14010 /* Skip also over DW_TAG_inlined_subroutine. */
14011 for (func_die
= die
->parent
;
14012 func_die
&& func_die
->tag
!= DW_TAG_subprogram
14013 && func_die
->tag
!= DW_TAG_subroutine_type
;
14014 func_die
= func_die
->parent
);
14016 /* DW_AT_call_all_calls is a superset
14017 of DW_AT_call_all_tail_calls. */
14019 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
14020 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
14021 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
14022 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
14024 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
14025 not complete. But keep CALL_SITE for look ups via call_site_htab,
14026 both the initial caller containing the real return address PC and
14027 the final callee containing the current PC of a chain of tail
14028 calls do not need to have the tail call list complete. But any
14029 function candidate for a virtual tail call frame searched via
14030 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
14031 determined unambiguously. */
14035 struct type
*func_type
= NULL
;
14038 func_type
= get_die_type (func_die
, cu
);
14039 if (func_type
!= NULL
)
14041 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
14043 /* Enlist this call site to the function. */
14044 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
14045 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
14048 complaint (_("Cannot find function owning DW_TAG_call_site "
14049 "DIE %s [in module %s]"),
14050 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14054 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
14056 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
14058 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
14061 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
14062 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14064 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
14065 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
14066 /* Keep NULL DWARF_BLOCK. */;
14067 else if (attr_form_is_block (attr
))
14069 struct dwarf2_locexpr_baton
*dlbaton
;
14071 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14072 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14073 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14074 dlbaton
->per_cu
= cu
->per_cu
;
14076 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
14078 else if (attr_form_is_ref (attr
))
14080 struct dwarf2_cu
*target_cu
= cu
;
14081 struct die_info
*target_die
;
14083 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14084 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
14085 if (die_is_declaration (target_die
, target_cu
))
14087 const char *target_physname
;
14089 /* Prefer the mangled name; otherwise compute the demangled one. */
14090 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14091 if (target_physname
== NULL
)
14092 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14093 if (target_physname
== NULL
)
14094 complaint (_("DW_AT_call_target target DIE has invalid "
14095 "physname, for referencing DIE %s [in module %s]"),
14096 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14098 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14104 /* DW_AT_entry_pc should be preferred. */
14105 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14106 <= PC_BOUNDS_INVALID
)
14107 complaint (_("DW_AT_call_target target DIE has invalid "
14108 "low pc, for referencing DIE %s [in module %s]"),
14109 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14112 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14113 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14118 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
14119 "block nor reference, for DIE %s [in module %s]"),
14120 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14122 call_site
->per_cu
= cu
->per_cu
;
14124 for (child_die
= die
->child
;
14125 child_die
&& child_die
->tag
;
14126 child_die
= sibling_die (child_die
))
14128 struct call_site_parameter
*parameter
;
14129 struct attribute
*loc
, *origin
;
14131 if (child_die
->tag
!= DW_TAG_call_site_parameter
14132 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14134 /* Already printed the complaint above. */
14138 gdb_assert (call_site
->parameter_count
< nparams
);
14139 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14141 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14142 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14143 register is contained in DW_AT_call_value. */
14145 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14146 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14147 if (origin
== NULL
)
14149 /* This was a pre-DWARF-5 GNU extension alias
14150 for DW_AT_call_parameter. */
14151 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14153 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14155 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14157 sect_offset sect_off
14158 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14159 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14161 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14162 binding can be done only inside one CU. Such referenced DIE
14163 therefore cannot be even moved to DW_TAG_partial_unit. */
14164 complaint (_("DW_AT_call_parameter offset is not in CU for "
14165 "DW_TAG_call_site child DIE %s [in module %s]"),
14166 sect_offset_str (child_die
->sect_off
),
14167 objfile_name (objfile
));
14170 parameter
->u
.param_cu_off
14171 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14173 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14175 complaint (_("No DW_FORM_block* DW_AT_location for "
14176 "DW_TAG_call_site child DIE %s [in module %s]"),
14177 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14182 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14183 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14184 if (parameter
->u
.dwarf_reg
!= -1)
14185 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14186 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14187 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14188 ¶meter
->u
.fb_offset
))
14189 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14192 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
14193 "for DW_FORM_block* DW_AT_location is supported for "
14194 "DW_TAG_call_site child DIE %s "
14196 sect_offset_str (child_die
->sect_off
),
14197 objfile_name (objfile
));
14202 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14204 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14205 if (!attr_form_is_block (attr
))
14207 complaint (_("No DW_FORM_block* DW_AT_call_value for "
14208 "DW_TAG_call_site child DIE %s [in module %s]"),
14209 sect_offset_str (child_die
->sect_off
),
14210 objfile_name (objfile
));
14213 parameter
->value
= DW_BLOCK (attr
)->data
;
14214 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14216 /* Parameters are not pre-cleared by memset above. */
14217 parameter
->data_value
= NULL
;
14218 parameter
->data_value_size
= 0;
14219 call_site
->parameter_count
++;
14221 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14223 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14226 if (!attr_form_is_block (attr
))
14227 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
14228 "DW_TAG_call_site child DIE %s [in module %s]"),
14229 sect_offset_str (child_die
->sect_off
),
14230 objfile_name (objfile
));
14233 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14234 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14240 /* Helper function for read_variable. If DIE represents a virtual
14241 table, then return the type of the concrete object that is
14242 associated with the virtual table. Otherwise, return NULL. */
14244 static struct type
*
14245 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14247 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14251 /* Find the type DIE. */
14252 struct die_info
*type_die
= NULL
;
14253 struct dwarf2_cu
*type_cu
= cu
;
14255 if (attr_form_is_ref (attr
))
14256 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14257 if (type_die
== NULL
)
14260 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14262 return die_containing_type (type_die
, type_cu
);
14265 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14268 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14270 struct rust_vtable_symbol
*storage
= NULL
;
14272 if (cu
->language
== language_rust
)
14274 struct type
*containing_type
= rust_containing_type (die
, cu
);
14276 if (containing_type
!= NULL
)
14278 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14280 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14281 struct rust_vtable_symbol
);
14282 initialize_objfile_symbol (storage
);
14283 storage
->concrete_type
= containing_type
;
14284 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14288 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
14289 struct attribute
*abstract_origin
14290 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14291 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
14292 if (res
== NULL
&& loc
&& abstract_origin
)
14294 /* We have a variable without a name, but with a location and an abstract
14295 origin. This may be a concrete instance of an abstract variable
14296 referenced from an DW_OP_GNU_variable_value, so save it to find it back
14298 struct dwarf2_cu
*origin_cu
= cu
;
14299 struct die_info
*origin_die
14300 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
14301 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
14302 dpo
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
14306 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14307 reading .debug_rnglists.
14308 Callback's type should be:
14309 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14310 Return true if the attributes are present and valid, otherwise,
14313 template <typename Callback
>
14315 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14316 Callback
&&callback
)
14318 struct dwarf2_per_objfile
*dwarf2_per_objfile
14319 = cu
->per_cu
->dwarf2_per_objfile
;
14320 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14321 bfd
*obfd
= objfile
->obfd
;
14322 /* Base address selection entry. */
14325 const gdb_byte
*buffer
;
14326 CORE_ADDR baseaddr
;
14327 bool overflow
= false;
14329 found_base
= cu
->base_known
;
14330 base
= cu
->base_address
;
14332 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14333 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14335 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14339 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14341 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14345 /* Initialize it due to a false compiler warning. */
14346 CORE_ADDR range_beginning
= 0, range_end
= 0;
14347 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14348 + dwarf2_per_objfile
->rnglists
.size
);
14349 unsigned int bytes_read
;
14351 if (buffer
== buf_end
)
14356 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14359 case DW_RLE_end_of_list
:
14361 case DW_RLE_base_address
:
14362 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14367 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14369 buffer
+= bytes_read
;
14371 case DW_RLE_start_length
:
14372 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14377 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14378 buffer
+= bytes_read
;
14379 range_end
= (range_beginning
14380 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14381 buffer
+= bytes_read
;
14382 if (buffer
> buf_end
)
14388 case DW_RLE_offset_pair
:
14389 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14390 buffer
+= bytes_read
;
14391 if (buffer
> buf_end
)
14396 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14397 buffer
+= bytes_read
;
14398 if (buffer
> buf_end
)
14404 case DW_RLE_start_end
:
14405 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14410 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14411 buffer
+= bytes_read
;
14412 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14413 buffer
+= bytes_read
;
14416 complaint (_("Invalid .debug_rnglists data (no base address)"));
14419 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14421 if (rlet
== DW_RLE_base_address
)
14426 /* We have no valid base address for the ranges
14428 complaint (_("Invalid .debug_rnglists data (no base address)"));
14432 if (range_beginning
> range_end
)
14434 /* Inverted range entries are invalid. */
14435 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14439 /* Empty range entries have no effect. */
14440 if (range_beginning
== range_end
)
14443 range_beginning
+= base
;
14446 /* A not-uncommon case of bad debug info.
14447 Don't pollute the addrmap with bad data. */
14448 if (range_beginning
+ baseaddr
== 0
14449 && !dwarf2_per_objfile
->has_section_at_zero
)
14451 complaint (_(".debug_rnglists entry has start address of zero"
14452 " [in module %s]"), objfile_name (objfile
));
14456 callback (range_beginning
, range_end
);
14461 complaint (_("Offset %d is not terminated "
14462 "for DW_AT_ranges attribute"),
14470 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14471 Callback's type should be:
14472 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14473 Return 1 if the attributes are present and valid, otherwise, return 0. */
14475 template <typename Callback
>
14477 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14478 Callback
&&callback
)
14480 struct dwarf2_per_objfile
*dwarf2_per_objfile
14481 = cu
->per_cu
->dwarf2_per_objfile
;
14482 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14483 struct comp_unit_head
*cu_header
= &cu
->header
;
14484 bfd
*obfd
= objfile
->obfd
;
14485 unsigned int addr_size
= cu_header
->addr_size
;
14486 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14487 /* Base address selection entry. */
14490 unsigned int dummy
;
14491 const gdb_byte
*buffer
;
14492 CORE_ADDR baseaddr
;
14494 if (cu_header
->version
>= 5)
14495 return dwarf2_rnglists_process (offset
, cu
, callback
);
14497 found_base
= cu
->base_known
;
14498 base
= cu
->base_address
;
14500 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14501 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14503 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14507 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14509 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14513 CORE_ADDR range_beginning
, range_end
;
14515 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14516 buffer
+= addr_size
;
14517 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14518 buffer
+= addr_size
;
14519 offset
+= 2 * addr_size
;
14521 /* An end of list marker is a pair of zero addresses. */
14522 if (range_beginning
== 0 && range_end
== 0)
14523 /* Found the end of list entry. */
14526 /* Each base address selection entry is a pair of 2 values.
14527 The first is the largest possible address, the second is
14528 the base address. Check for a base address here. */
14529 if ((range_beginning
& mask
) == mask
)
14531 /* If we found the largest possible address, then we already
14532 have the base address in range_end. */
14540 /* We have no valid base address for the ranges
14542 complaint (_("Invalid .debug_ranges data (no base address)"));
14546 if (range_beginning
> range_end
)
14548 /* Inverted range entries are invalid. */
14549 complaint (_("Invalid .debug_ranges data (inverted range)"));
14553 /* Empty range entries have no effect. */
14554 if (range_beginning
== range_end
)
14557 range_beginning
+= base
;
14560 /* A not-uncommon case of bad debug info.
14561 Don't pollute the addrmap with bad data. */
14562 if (range_beginning
+ baseaddr
== 0
14563 && !dwarf2_per_objfile
->has_section_at_zero
)
14565 complaint (_(".debug_ranges entry has start address of zero"
14566 " [in module %s]"), objfile_name (objfile
));
14570 callback (range_beginning
, range_end
);
14576 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14577 Return 1 if the attributes are present and valid, otherwise, return 0.
14578 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14581 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14582 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14583 struct partial_symtab
*ranges_pst
)
14585 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14586 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14587 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14588 SECT_OFF_TEXT (objfile
));
14591 CORE_ADDR high
= 0;
14594 retval
= dwarf2_ranges_process (offset
, cu
,
14595 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14597 if (ranges_pst
!= NULL
)
14602 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14603 range_beginning
+ baseaddr
)
14605 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14606 range_end
+ baseaddr
)
14608 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
14609 lowpc
, highpc
- 1, ranges_pst
);
14612 /* FIXME: This is recording everything as a low-high
14613 segment of consecutive addresses. We should have a
14614 data structure for discontiguous block ranges
14618 low
= range_beginning
;
14624 if (range_beginning
< low
)
14625 low
= range_beginning
;
14626 if (range_end
> high
)
14634 /* If the first entry is an end-of-list marker, the range
14635 describes an empty scope, i.e. no instructions. */
14641 *high_return
= high
;
14645 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14646 definition for the return value. *LOWPC and *HIGHPC are set iff
14647 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14649 static enum pc_bounds_kind
14650 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14651 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14652 struct partial_symtab
*pst
)
14654 struct dwarf2_per_objfile
*dwarf2_per_objfile
14655 = cu
->per_cu
->dwarf2_per_objfile
;
14656 struct attribute
*attr
;
14657 struct attribute
*attr_high
;
14659 CORE_ADDR high
= 0;
14660 enum pc_bounds_kind ret
;
14662 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14665 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14668 low
= attr_value_as_address (attr
);
14669 high
= attr_value_as_address (attr_high
);
14670 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14674 /* Found high w/o low attribute. */
14675 return PC_BOUNDS_INVALID
;
14677 /* Found consecutive range of addresses. */
14678 ret
= PC_BOUNDS_HIGH_LOW
;
14682 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14685 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14686 We take advantage of the fact that DW_AT_ranges does not appear
14687 in DW_TAG_compile_unit of DWO files. */
14688 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14689 unsigned int ranges_offset
= (DW_UNSND (attr
)
14690 + (need_ranges_base
14694 /* Value of the DW_AT_ranges attribute is the offset in the
14695 .debug_ranges section. */
14696 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14697 return PC_BOUNDS_INVALID
;
14698 /* Found discontinuous range of addresses. */
14699 ret
= PC_BOUNDS_RANGES
;
14702 return PC_BOUNDS_NOT_PRESENT
;
14705 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14707 return PC_BOUNDS_INVALID
;
14709 /* When using the GNU linker, .gnu.linkonce. sections are used to
14710 eliminate duplicate copies of functions and vtables and such.
14711 The linker will arbitrarily choose one and discard the others.
14712 The AT_*_pc values for such functions refer to local labels in
14713 these sections. If the section from that file was discarded, the
14714 labels are not in the output, so the relocs get a value of 0.
14715 If this is a discarded function, mark the pc bounds as invalid,
14716 so that GDB will ignore it. */
14717 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14718 return PC_BOUNDS_INVALID
;
14726 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14727 its low and high PC addresses. Do nothing if these addresses could not
14728 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14729 and HIGHPC to the high address if greater than HIGHPC. */
14732 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14733 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14734 struct dwarf2_cu
*cu
)
14736 CORE_ADDR low
, high
;
14737 struct die_info
*child
= die
->child
;
14739 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14741 *lowpc
= std::min (*lowpc
, low
);
14742 *highpc
= std::max (*highpc
, high
);
14745 /* If the language does not allow nested subprograms (either inside
14746 subprograms or lexical blocks), we're done. */
14747 if (cu
->language
!= language_ada
)
14750 /* Check all the children of the given DIE. If it contains nested
14751 subprograms, then check their pc bounds. Likewise, we need to
14752 check lexical blocks as well, as they may also contain subprogram
14754 while (child
&& child
->tag
)
14756 if (child
->tag
== DW_TAG_subprogram
14757 || child
->tag
== DW_TAG_lexical_block
)
14758 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14759 child
= sibling_die (child
);
14763 /* Get the low and high pc's represented by the scope DIE, and store
14764 them in *LOWPC and *HIGHPC. If the correct values can't be
14765 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14768 get_scope_pc_bounds (struct die_info
*die
,
14769 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14770 struct dwarf2_cu
*cu
)
14772 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14773 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14774 CORE_ADDR current_low
, current_high
;
14776 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14777 >= PC_BOUNDS_RANGES
)
14779 best_low
= current_low
;
14780 best_high
= current_high
;
14784 struct die_info
*child
= die
->child
;
14786 while (child
&& child
->tag
)
14788 switch (child
->tag
) {
14789 case DW_TAG_subprogram
:
14790 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14792 case DW_TAG_namespace
:
14793 case DW_TAG_module
:
14794 /* FIXME: carlton/2004-01-16: Should we do this for
14795 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14796 that current GCC's always emit the DIEs corresponding
14797 to definitions of methods of classes as children of a
14798 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14799 the DIEs giving the declarations, which could be
14800 anywhere). But I don't see any reason why the
14801 standards says that they have to be there. */
14802 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14804 if (current_low
!= ((CORE_ADDR
) -1))
14806 best_low
= std::min (best_low
, current_low
);
14807 best_high
= std::max (best_high
, current_high
);
14815 child
= sibling_die (child
);
14820 *highpc
= best_high
;
14823 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14827 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14828 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14830 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14831 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14832 struct attribute
*attr
;
14833 struct attribute
*attr_high
;
14835 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14838 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14841 CORE_ADDR low
= attr_value_as_address (attr
);
14842 CORE_ADDR high
= attr_value_as_address (attr_high
);
14844 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14847 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14848 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14849 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14853 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14856 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14857 We take advantage of the fact that DW_AT_ranges does not appear
14858 in DW_TAG_compile_unit of DWO files. */
14859 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14861 /* The value of the DW_AT_ranges attribute is the offset of the
14862 address range list in the .debug_ranges section. */
14863 unsigned long offset
= (DW_UNSND (attr
)
14864 + (need_ranges_base
? cu
->ranges_base
: 0));
14866 std::vector
<blockrange
> blockvec
;
14867 dwarf2_ranges_process (offset
, cu
,
14868 [&] (CORE_ADDR start
, CORE_ADDR end
)
14872 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14873 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14874 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14875 blockvec
.emplace_back (start
, end
);
14878 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14882 /* Check whether the producer field indicates either of GCC < 4.6, or the
14883 Intel C/C++ compiler, and cache the result in CU. */
14886 check_producer (struct dwarf2_cu
*cu
)
14890 if (cu
->producer
== NULL
)
14892 /* For unknown compilers expect their behavior is DWARF version
14895 GCC started to support .debug_types sections by -gdwarf-4 since
14896 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14897 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14898 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14899 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14901 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14903 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14904 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14906 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14908 cu
->producer_is_icc
= true;
14909 cu
->producer_is_icc_lt_14
= major
< 14;
14911 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14912 cu
->producer_is_codewarrior
= true;
14915 /* For other non-GCC compilers, expect their behavior is DWARF version
14919 cu
->checked_producer
= true;
14922 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14923 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14924 during 4.6.0 experimental. */
14927 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14929 if (!cu
->checked_producer
)
14930 check_producer (cu
);
14932 return cu
->producer_is_gxx_lt_4_6
;
14936 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14937 with incorrect is_stmt attributes. */
14940 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14942 if (!cu
->checked_producer
)
14943 check_producer (cu
);
14945 return cu
->producer_is_codewarrior
;
14948 /* Return the default accessibility type if it is not overriden by
14949 DW_AT_accessibility. */
14951 static enum dwarf_access_attribute
14952 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14954 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14956 /* The default DWARF 2 accessibility for members is public, the default
14957 accessibility for inheritance is private. */
14959 if (die
->tag
!= DW_TAG_inheritance
)
14960 return DW_ACCESS_public
;
14962 return DW_ACCESS_private
;
14966 /* DWARF 3+ defines the default accessibility a different way. The same
14967 rules apply now for DW_TAG_inheritance as for the members and it only
14968 depends on the container kind. */
14970 if (die
->parent
->tag
== DW_TAG_class_type
)
14971 return DW_ACCESS_private
;
14973 return DW_ACCESS_public
;
14977 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14978 offset. If the attribute was not found return 0, otherwise return
14979 1. If it was found but could not properly be handled, set *OFFSET
14983 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14986 struct attribute
*attr
;
14988 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14993 /* Note that we do not check for a section offset first here.
14994 This is because DW_AT_data_member_location is new in DWARF 4,
14995 so if we see it, we can assume that a constant form is really
14996 a constant and not a section offset. */
14997 if (attr_form_is_constant (attr
))
14998 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
14999 else if (attr_form_is_section_offset (attr
))
15000 dwarf2_complex_location_expr_complaint ();
15001 else if (attr_form_is_block (attr
))
15002 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15004 dwarf2_complex_location_expr_complaint ();
15012 /* Add an aggregate field to the field list. */
15015 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
15016 struct dwarf2_cu
*cu
)
15018 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15019 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15020 struct nextfield
*new_field
;
15021 struct attribute
*attr
;
15023 const char *fieldname
= "";
15025 if (die
->tag
== DW_TAG_inheritance
)
15027 fip
->baseclasses
.emplace_back ();
15028 new_field
= &fip
->baseclasses
.back ();
15032 fip
->fields
.emplace_back ();
15033 new_field
= &fip
->fields
.back ();
15038 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15040 new_field
->accessibility
= DW_UNSND (attr
);
15042 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
15043 if (new_field
->accessibility
!= DW_ACCESS_public
)
15044 fip
->non_public_fields
= 1;
15046 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15048 new_field
->virtuality
= DW_UNSND (attr
);
15050 new_field
->virtuality
= DW_VIRTUALITY_none
;
15052 fp
= &new_field
->field
;
15054 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
15058 /* Data member other than a C++ static data member. */
15060 /* Get type of field. */
15061 fp
->type
= die_type (die
, cu
);
15063 SET_FIELD_BITPOS (*fp
, 0);
15065 /* Get bit size of field (zero if none). */
15066 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
15069 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
15073 FIELD_BITSIZE (*fp
) = 0;
15076 /* Get bit offset of field. */
15077 if (handle_data_member_location (die
, cu
, &offset
))
15078 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15079 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
15082 if (gdbarch_bits_big_endian (gdbarch
))
15084 /* For big endian bits, the DW_AT_bit_offset gives the
15085 additional bit offset from the MSB of the containing
15086 anonymous object to the MSB of the field. We don't
15087 have to do anything special since we don't need to
15088 know the size of the anonymous object. */
15089 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
15093 /* For little endian bits, compute the bit offset to the
15094 MSB of the anonymous object, subtract off the number of
15095 bits from the MSB of the field to the MSB of the
15096 object, and then subtract off the number of bits of
15097 the field itself. The result is the bit offset of
15098 the LSB of the field. */
15099 int anonymous_size
;
15100 int bit_offset
= DW_UNSND (attr
);
15102 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15105 /* The size of the anonymous object containing
15106 the bit field is explicit, so use the
15107 indicated size (in bytes). */
15108 anonymous_size
= DW_UNSND (attr
);
15112 /* The size of the anonymous object containing
15113 the bit field must be inferred from the type
15114 attribute of the data member containing the
15116 anonymous_size
= TYPE_LENGTH (fp
->type
);
15118 SET_FIELD_BITPOS (*fp
,
15119 (FIELD_BITPOS (*fp
)
15120 + anonymous_size
* bits_per_byte
15121 - bit_offset
- FIELD_BITSIZE (*fp
)));
15124 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15126 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15127 + dwarf2_get_attr_constant_value (attr
, 0)));
15129 /* Get name of field. */
15130 fieldname
= dwarf2_name (die
, cu
);
15131 if (fieldname
== NULL
)
15134 /* The name is already allocated along with this objfile, so we don't
15135 need to duplicate it for the type. */
15136 fp
->name
= fieldname
;
15138 /* Change accessibility for artificial fields (e.g. virtual table
15139 pointer or virtual base class pointer) to private. */
15140 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15142 FIELD_ARTIFICIAL (*fp
) = 1;
15143 new_field
->accessibility
= DW_ACCESS_private
;
15144 fip
->non_public_fields
= 1;
15147 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15149 /* C++ static member. */
15151 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15152 is a declaration, but all versions of G++ as of this writing
15153 (so through at least 3.2.1) incorrectly generate
15154 DW_TAG_variable tags. */
15156 const char *physname
;
15158 /* Get name of field. */
15159 fieldname
= dwarf2_name (die
, cu
);
15160 if (fieldname
== NULL
)
15163 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15165 /* Only create a symbol if this is an external value.
15166 new_symbol checks this and puts the value in the global symbol
15167 table, which we want. If it is not external, new_symbol
15168 will try to put the value in cu->list_in_scope which is wrong. */
15169 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15171 /* A static const member, not much different than an enum as far as
15172 we're concerned, except that we can support more types. */
15173 new_symbol (die
, NULL
, cu
);
15176 /* Get physical name. */
15177 physname
= dwarf2_physname (fieldname
, die
, cu
);
15179 /* The name is already allocated along with this objfile, so we don't
15180 need to duplicate it for the type. */
15181 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15182 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15183 FIELD_NAME (*fp
) = fieldname
;
15185 else if (die
->tag
== DW_TAG_inheritance
)
15189 /* C++ base class field. */
15190 if (handle_data_member_location (die
, cu
, &offset
))
15191 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15192 FIELD_BITSIZE (*fp
) = 0;
15193 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15194 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
15196 else if (die
->tag
== DW_TAG_variant_part
)
15198 /* process_structure_scope will treat this DIE as a union. */
15199 process_structure_scope (die
, cu
);
15201 /* The variant part is relative to the start of the enclosing
15203 SET_FIELD_BITPOS (*fp
, 0);
15204 fp
->type
= get_die_type (die
, cu
);
15205 fp
->artificial
= 1;
15206 fp
->name
= "<<variant>>";
15208 /* Normally a DW_TAG_variant_part won't have a size, but our
15209 representation requires one, so set it to the maximum of the
15211 if (TYPE_LENGTH (fp
->type
) == 0)
15214 for (int i
= 0; i
< TYPE_NFIELDS (fp
->type
); ++i
)
15215 if (TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
)) > max
)
15216 max
= TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
));
15217 TYPE_LENGTH (fp
->type
) = max
;
15221 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15224 /* Can the type given by DIE define another type? */
15227 type_can_define_types (const struct die_info
*die
)
15231 case DW_TAG_typedef
:
15232 case DW_TAG_class_type
:
15233 case DW_TAG_structure_type
:
15234 case DW_TAG_union_type
:
15235 case DW_TAG_enumeration_type
:
15243 /* Add a type definition defined in the scope of the FIP's class. */
15246 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15247 struct dwarf2_cu
*cu
)
15249 struct decl_field fp
;
15250 memset (&fp
, 0, sizeof (fp
));
15252 gdb_assert (type_can_define_types (die
));
15254 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15255 fp
.name
= dwarf2_name (die
, cu
);
15256 fp
.type
= read_type_die (die
, cu
);
15258 /* Save accessibility. */
15259 enum dwarf_access_attribute accessibility
;
15260 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15262 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15264 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15265 switch (accessibility
)
15267 case DW_ACCESS_public
:
15268 /* The assumed value if neither private nor protected. */
15270 case DW_ACCESS_private
:
15273 case DW_ACCESS_protected
:
15274 fp
.is_protected
= 1;
15277 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15280 if (die
->tag
== DW_TAG_typedef
)
15281 fip
->typedef_field_list
.push_back (fp
);
15283 fip
->nested_types_list
.push_back (fp
);
15286 /* Create the vector of fields, and attach it to the type. */
15289 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15290 struct dwarf2_cu
*cu
)
15292 int nfields
= fip
->nfields
;
15294 /* Record the field count, allocate space for the array of fields,
15295 and create blank accessibility bitfields if necessary. */
15296 TYPE_NFIELDS (type
) = nfields
;
15297 TYPE_FIELDS (type
) = (struct field
*)
15298 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15300 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15302 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15304 TYPE_FIELD_PRIVATE_BITS (type
) =
15305 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15306 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15308 TYPE_FIELD_PROTECTED_BITS (type
) =
15309 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15310 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15312 TYPE_FIELD_IGNORE_BITS (type
) =
15313 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15314 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15317 /* If the type has baseclasses, allocate and clear a bit vector for
15318 TYPE_FIELD_VIRTUAL_BITS. */
15319 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15321 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15322 unsigned char *pointer
;
15324 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15325 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15326 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15327 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15328 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15331 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15333 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15335 for (int index
= 0; index
< nfields
; ++index
)
15337 struct nextfield
&field
= fip
->fields
[index
];
15339 if (field
.variant
.is_discriminant
)
15340 di
->discriminant_index
= index
;
15341 else if (field
.variant
.default_branch
)
15342 di
->default_index
= index
;
15344 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15348 /* Copy the saved-up fields into the field vector. */
15349 for (int i
= 0; i
< nfields
; ++i
)
15351 struct nextfield
&field
15352 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15353 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15355 TYPE_FIELD (type
, i
) = field
.field
;
15356 switch (field
.accessibility
)
15358 case DW_ACCESS_private
:
15359 if (cu
->language
!= language_ada
)
15360 SET_TYPE_FIELD_PRIVATE (type
, i
);
15363 case DW_ACCESS_protected
:
15364 if (cu
->language
!= language_ada
)
15365 SET_TYPE_FIELD_PROTECTED (type
, i
);
15368 case DW_ACCESS_public
:
15372 /* Unknown accessibility. Complain and treat it as public. */
15374 complaint (_("unsupported accessibility %d"),
15375 field
.accessibility
);
15379 if (i
< fip
->baseclasses
.size ())
15381 switch (field
.virtuality
)
15383 case DW_VIRTUALITY_virtual
:
15384 case DW_VIRTUALITY_pure_virtual
:
15385 if (cu
->language
== language_ada
)
15386 error (_("unexpected virtuality in component of Ada type"));
15387 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15394 /* Return true if this member function is a constructor, false
15398 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15400 const char *fieldname
;
15401 const char *type_name
;
15404 if (die
->parent
== NULL
)
15407 if (die
->parent
->tag
!= DW_TAG_structure_type
15408 && die
->parent
->tag
!= DW_TAG_union_type
15409 && die
->parent
->tag
!= DW_TAG_class_type
)
15412 fieldname
= dwarf2_name (die
, cu
);
15413 type_name
= dwarf2_name (die
->parent
, cu
);
15414 if (fieldname
== NULL
|| type_name
== NULL
)
15417 len
= strlen (fieldname
);
15418 return (strncmp (fieldname
, type_name
, len
) == 0
15419 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15422 /* Add a member function to the proper fieldlist. */
15425 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15426 struct type
*type
, struct dwarf2_cu
*cu
)
15428 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15429 struct attribute
*attr
;
15431 struct fnfieldlist
*flp
= nullptr;
15432 struct fn_field
*fnp
;
15433 const char *fieldname
;
15434 struct type
*this_type
;
15435 enum dwarf_access_attribute accessibility
;
15437 if (cu
->language
== language_ada
)
15438 error (_("unexpected member function in Ada type"));
15440 /* Get name of member function. */
15441 fieldname
= dwarf2_name (die
, cu
);
15442 if (fieldname
== NULL
)
15445 /* Look up member function name in fieldlist. */
15446 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15448 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15450 flp
= &fip
->fnfieldlists
[i
];
15455 /* Create a new fnfieldlist if necessary. */
15456 if (flp
== nullptr)
15458 fip
->fnfieldlists
.emplace_back ();
15459 flp
= &fip
->fnfieldlists
.back ();
15460 flp
->name
= fieldname
;
15461 i
= fip
->fnfieldlists
.size () - 1;
15464 /* Create a new member function field and add it to the vector of
15466 flp
->fnfields
.emplace_back ();
15467 fnp
= &flp
->fnfields
.back ();
15469 /* Delay processing of the physname until later. */
15470 if (cu
->language
== language_cplus
)
15471 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15475 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15476 fnp
->physname
= physname
? physname
: "";
15479 fnp
->type
= alloc_type (objfile
);
15480 this_type
= read_type_die (die
, cu
);
15481 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15483 int nparams
= TYPE_NFIELDS (this_type
);
15485 /* TYPE is the domain of this method, and THIS_TYPE is the type
15486 of the method itself (TYPE_CODE_METHOD). */
15487 smash_to_method_type (fnp
->type
, type
,
15488 TYPE_TARGET_TYPE (this_type
),
15489 TYPE_FIELDS (this_type
),
15490 TYPE_NFIELDS (this_type
),
15491 TYPE_VARARGS (this_type
));
15493 /* Handle static member functions.
15494 Dwarf2 has no clean way to discern C++ static and non-static
15495 member functions. G++ helps GDB by marking the first
15496 parameter for non-static member functions (which is the this
15497 pointer) as artificial. We obtain this information from
15498 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15499 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15500 fnp
->voffset
= VOFFSET_STATIC
;
15503 complaint (_("member function type missing for '%s'"),
15504 dwarf2_full_name (fieldname
, die
, cu
));
15506 /* Get fcontext from DW_AT_containing_type if present. */
15507 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15508 fnp
->fcontext
= die_containing_type (die
, cu
);
15510 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15511 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15513 /* Get accessibility. */
15514 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15516 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15518 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15519 switch (accessibility
)
15521 case DW_ACCESS_private
:
15522 fnp
->is_private
= 1;
15524 case DW_ACCESS_protected
:
15525 fnp
->is_protected
= 1;
15529 /* Check for artificial methods. */
15530 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15531 if (attr
&& DW_UNSND (attr
) != 0)
15532 fnp
->is_artificial
= 1;
15534 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15536 /* Get index in virtual function table if it is a virtual member
15537 function. For older versions of GCC, this is an offset in the
15538 appropriate virtual table, as specified by DW_AT_containing_type.
15539 For everyone else, it is an expression to be evaluated relative
15540 to the object address. */
15542 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15545 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15547 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15549 /* Old-style GCC. */
15550 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15552 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15553 || (DW_BLOCK (attr
)->size
> 1
15554 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15555 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15557 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15558 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15559 dwarf2_complex_location_expr_complaint ();
15561 fnp
->voffset
/= cu
->header
.addr_size
;
15565 dwarf2_complex_location_expr_complaint ();
15567 if (!fnp
->fcontext
)
15569 /* If there is no `this' field and no DW_AT_containing_type,
15570 we cannot actually find a base class context for the
15572 if (TYPE_NFIELDS (this_type
) == 0
15573 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15575 complaint (_("cannot determine context for virtual member "
15576 "function \"%s\" (offset %s)"),
15577 fieldname
, sect_offset_str (die
->sect_off
));
15582 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15586 else if (attr_form_is_section_offset (attr
))
15588 dwarf2_complex_location_expr_complaint ();
15592 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15598 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15599 if (attr
&& DW_UNSND (attr
))
15601 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15602 complaint (_("Member function \"%s\" (offset %s) is virtual "
15603 "but the vtable offset is not specified"),
15604 fieldname
, sect_offset_str (die
->sect_off
));
15605 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15606 TYPE_CPLUS_DYNAMIC (type
) = 1;
15611 /* Create the vector of member function fields, and attach it to the type. */
15614 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15615 struct dwarf2_cu
*cu
)
15617 if (cu
->language
== language_ada
)
15618 error (_("unexpected member functions in Ada type"));
15620 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15621 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15623 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15625 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15627 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15628 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15630 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15631 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15632 fn_flp
->fn_fields
= (struct fn_field
*)
15633 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15635 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15636 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15639 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15642 /* Returns non-zero if NAME is the name of a vtable member in CU's
15643 language, zero otherwise. */
15645 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15647 static const char vptr
[] = "_vptr";
15649 /* Look for the C++ form of the vtable. */
15650 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15656 /* GCC outputs unnamed structures that are really pointers to member
15657 functions, with the ABI-specified layout. If TYPE describes
15658 such a structure, smash it into a member function type.
15660 GCC shouldn't do this; it should just output pointer to member DIEs.
15661 This is GCC PR debug/28767. */
15664 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15666 struct type
*pfn_type
, *self_type
, *new_type
;
15668 /* Check for a structure with no name and two children. */
15669 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15672 /* Check for __pfn and __delta members. */
15673 if (TYPE_FIELD_NAME (type
, 0) == NULL
15674 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15675 || TYPE_FIELD_NAME (type
, 1) == NULL
15676 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15679 /* Find the type of the method. */
15680 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15681 if (pfn_type
== NULL
15682 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15683 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15686 /* Look for the "this" argument. */
15687 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15688 if (TYPE_NFIELDS (pfn_type
) == 0
15689 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15690 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15693 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15694 new_type
= alloc_type (objfile
);
15695 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15696 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15697 TYPE_VARARGS (pfn_type
));
15698 smash_to_methodptr_type (type
, new_type
);
15701 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15702 appropriate error checking and issuing complaints if there is a
15706 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15708 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15710 if (attr
== nullptr)
15713 if (!attr_form_is_constant (attr
))
15715 complaint (_("DW_AT_alignment must have constant form"
15716 " - DIE at %s [in module %s]"),
15717 sect_offset_str (die
->sect_off
),
15718 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15723 if (attr
->form
== DW_FORM_sdata
)
15725 LONGEST val
= DW_SND (attr
);
15728 complaint (_("DW_AT_alignment value must not be negative"
15729 " - DIE at %s [in module %s]"),
15730 sect_offset_str (die
->sect_off
),
15731 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15737 align
= DW_UNSND (attr
);
15741 complaint (_("DW_AT_alignment value must not be zero"
15742 " - DIE at %s [in module %s]"),
15743 sect_offset_str (die
->sect_off
),
15744 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15747 if ((align
& (align
- 1)) != 0)
15749 complaint (_("DW_AT_alignment value must be a power of 2"
15750 " - DIE at %s [in module %s]"),
15751 sect_offset_str (die
->sect_off
),
15752 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15759 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15760 the alignment for TYPE. */
15763 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15766 if (!set_type_align (type
, get_alignment (cu
, die
)))
15767 complaint (_("DW_AT_alignment value too large"
15768 " - DIE at %s [in module %s]"),
15769 sect_offset_str (die
->sect_off
),
15770 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15773 /* Called when we find the DIE that starts a structure or union scope
15774 (definition) to create a type for the structure or union. Fill in
15775 the type's name and general properties; the members will not be
15776 processed until process_structure_scope. A symbol table entry for
15777 the type will also not be done until process_structure_scope (assuming
15778 the type has a name).
15780 NOTE: we need to call these functions regardless of whether or not the
15781 DIE has a DW_AT_name attribute, since it might be an anonymous
15782 structure or union. This gets the type entered into our set of
15783 user defined types. */
15785 static struct type
*
15786 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15788 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15790 struct attribute
*attr
;
15793 /* If the definition of this type lives in .debug_types, read that type.
15794 Don't follow DW_AT_specification though, that will take us back up
15795 the chain and we want to go down. */
15796 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15799 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15801 /* The type's CU may not be the same as CU.
15802 Ensure TYPE is recorded with CU in die_type_hash. */
15803 return set_die_type (die
, type
, cu
);
15806 type
= alloc_type (objfile
);
15807 INIT_CPLUS_SPECIFIC (type
);
15809 name
= dwarf2_name (die
, cu
);
15812 if (cu
->language
== language_cplus
15813 || cu
->language
== language_d
15814 || cu
->language
== language_rust
)
15816 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15818 /* dwarf2_full_name might have already finished building the DIE's
15819 type. If so, there is no need to continue. */
15820 if (get_die_type (die
, cu
) != NULL
)
15821 return get_die_type (die
, cu
);
15823 TYPE_NAME (type
) = full_name
;
15827 /* The name is already allocated along with this objfile, so
15828 we don't need to duplicate it for the type. */
15829 TYPE_NAME (type
) = name
;
15833 if (die
->tag
== DW_TAG_structure_type
)
15835 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15837 else if (die
->tag
== DW_TAG_union_type
)
15839 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15841 else if (die
->tag
== DW_TAG_variant_part
)
15843 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15844 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15848 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15851 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15852 TYPE_DECLARED_CLASS (type
) = 1;
15854 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15857 if (attr_form_is_constant (attr
))
15858 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15861 /* For the moment, dynamic type sizes are not supported
15862 by GDB's struct type. The actual size is determined
15863 on-demand when resolving the type of a given object,
15864 so set the type's length to zero for now. Otherwise,
15865 we record an expression as the length, and that expression
15866 could lead to a very large value, which could eventually
15867 lead to us trying to allocate that much memory when creating
15868 a value of that type. */
15869 TYPE_LENGTH (type
) = 0;
15874 TYPE_LENGTH (type
) = 0;
15877 maybe_set_alignment (cu
, die
, type
);
15879 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15881 /* ICC<14 does not output the required DW_AT_declaration on
15882 incomplete types, but gives them a size of zero. */
15883 TYPE_STUB (type
) = 1;
15886 TYPE_STUB_SUPPORTED (type
) = 1;
15888 if (die_is_declaration (die
, cu
))
15889 TYPE_STUB (type
) = 1;
15890 else if (attr
== NULL
&& die
->child
== NULL
15891 && producer_is_realview (cu
->producer
))
15892 /* RealView does not output the required DW_AT_declaration
15893 on incomplete types. */
15894 TYPE_STUB (type
) = 1;
15896 /* We need to add the type field to the die immediately so we don't
15897 infinitely recurse when dealing with pointers to the structure
15898 type within the structure itself. */
15899 set_die_type (die
, type
, cu
);
15901 /* set_die_type should be already done. */
15902 set_descriptive_type (type
, die
, cu
);
15907 /* A helper for process_structure_scope that handles a single member
15911 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15912 struct field_info
*fi
,
15913 std::vector
<struct symbol
*> *template_args
,
15914 struct dwarf2_cu
*cu
)
15916 if (child_die
->tag
== DW_TAG_member
15917 || child_die
->tag
== DW_TAG_variable
15918 || child_die
->tag
== DW_TAG_variant_part
)
15920 /* NOTE: carlton/2002-11-05: A C++ static data member
15921 should be a DW_TAG_member that is a declaration, but
15922 all versions of G++ as of this writing (so through at
15923 least 3.2.1) incorrectly generate DW_TAG_variable
15924 tags for them instead. */
15925 dwarf2_add_field (fi
, child_die
, cu
);
15927 else if (child_die
->tag
== DW_TAG_subprogram
)
15929 /* Rust doesn't have member functions in the C++ sense.
15930 However, it does emit ordinary functions as children
15931 of a struct DIE. */
15932 if (cu
->language
== language_rust
)
15933 read_func_scope (child_die
, cu
);
15936 /* C++ member function. */
15937 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15940 else if (child_die
->tag
== DW_TAG_inheritance
)
15942 /* C++ base class field. */
15943 dwarf2_add_field (fi
, child_die
, cu
);
15945 else if (type_can_define_types (child_die
))
15946 dwarf2_add_type_defn (fi
, child_die
, cu
);
15947 else if (child_die
->tag
== DW_TAG_template_type_param
15948 || child_die
->tag
== DW_TAG_template_value_param
)
15950 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15953 template_args
->push_back (arg
);
15955 else if (child_die
->tag
== DW_TAG_variant
)
15957 /* In a variant we want to get the discriminant and also add a
15958 field for our sole member child. */
15959 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15961 for (die_info
*variant_child
= child_die
->child
;
15962 variant_child
!= NULL
;
15963 variant_child
= sibling_die (variant_child
))
15965 if (variant_child
->tag
== DW_TAG_member
)
15967 handle_struct_member_die (variant_child
, type
, fi
,
15968 template_args
, cu
);
15969 /* Only handle the one. */
15974 /* We don't handle this but we might as well report it if we see
15976 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15977 complaint (_("DW_AT_discr_list is not supported yet"
15978 " - DIE at %s [in module %s]"),
15979 sect_offset_str (child_die
->sect_off
),
15980 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15982 /* The first field was just added, so we can stash the
15983 discriminant there. */
15984 gdb_assert (!fi
->fields
.empty ());
15986 fi
->fields
.back ().variant
.default_branch
= true;
15988 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15992 /* Finish creating a structure or union type, including filling in
15993 its members and creating a symbol for it. */
15996 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15998 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15999 struct die_info
*child_die
;
16002 type
= get_die_type (die
, cu
);
16004 type
= read_structure_type (die
, cu
);
16006 /* When reading a DW_TAG_variant_part, we need to notice when we
16007 read the discriminant member, so we can record it later in the
16008 discriminant_info. */
16009 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
16010 sect_offset discr_offset
;
16011 bool has_template_parameters
= false;
16013 if (is_variant_part
)
16015 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
16018 /* Maybe it's a univariant form, an extension we support.
16019 In this case arrange not to check the offset. */
16020 is_variant_part
= false;
16022 else if (attr_form_is_ref (discr
))
16024 struct dwarf2_cu
*target_cu
= cu
;
16025 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
16027 discr_offset
= target_die
->sect_off
;
16031 complaint (_("DW_AT_discr does not have DIE reference form"
16032 " - DIE at %s [in module %s]"),
16033 sect_offset_str (die
->sect_off
),
16034 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16035 is_variant_part
= false;
16039 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
16041 struct field_info fi
;
16042 std::vector
<struct symbol
*> template_args
;
16044 child_die
= die
->child
;
16046 while (child_die
&& child_die
->tag
)
16048 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
16050 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
16051 fi
.fields
.back ().variant
.is_discriminant
= true;
16053 child_die
= sibling_die (child_die
);
16056 /* Attach template arguments to type. */
16057 if (!template_args
.empty ())
16059 has_template_parameters
= true;
16060 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16061 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
16062 TYPE_TEMPLATE_ARGUMENTS (type
)
16063 = XOBNEWVEC (&objfile
->objfile_obstack
,
16065 TYPE_N_TEMPLATE_ARGUMENTS (type
));
16066 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
16067 template_args
.data (),
16068 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
16069 * sizeof (struct symbol
*)));
16072 /* Attach fields and member functions to the type. */
16074 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
16075 if (!fi
.fnfieldlists
.empty ())
16077 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
16079 /* Get the type which refers to the base class (possibly this
16080 class itself) which contains the vtable pointer for the current
16081 class from the DW_AT_containing_type attribute. This use of
16082 DW_AT_containing_type is a GNU extension. */
16084 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
16086 struct type
*t
= die_containing_type (die
, cu
);
16088 set_type_vptr_basetype (type
, t
);
16093 /* Our own class provides vtbl ptr. */
16094 for (i
= TYPE_NFIELDS (t
) - 1;
16095 i
>= TYPE_N_BASECLASSES (t
);
16098 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
16100 if (is_vtable_name (fieldname
, cu
))
16102 set_type_vptr_fieldno (type
, i
);
16107 /* Complain if virtual function table field not found. */
16108 if (i
< TYPE_N_BASECLASSES (t
))
16109 complaint (_("virtual function table pointer "
16110 "not found when defining class '%s'"),
16111 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
16115 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16118 else if (cu
->producer
16119 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16121 /* The IBM XLC compiler does not provide direct indication
16122 of the containing type, but the vtable pointer is
16123 always named __vfp. */
16127 for (i
= TYPE_NFIELDS (type
) - 1;
16128 i
>= TYPE_N_BASECLASSES (type
);
16131 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16133 set_type_vptr_fieldno (type
, i
);
16134 set_type_vptr_basetype (type
, type
);
16141 /* Copy fi.typedef_field_list linked list elements content into the
16142 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16143 if (!fi
.typedef_field_list
.empty ())
16145 int count
= fi
.typedef_field_list
.size ();
16147 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16148 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16149 = ((struct decl_field
*)
16151 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16152 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16154 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16155 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16158 /* Copy fi.nested_types_list linked list elements content into the
16159 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16160 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16162 int count
= fi
.nested_types_list
.size ();
16164 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16165 TYPE_NESTED_TYPES_ARRAY (type
)
16166 = ((struct decl_field
*)
16167 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16168 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16170 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16171 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16175 quirk_gcc_member_function_pointer (type
, objfile
);
16176 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16177 cu
->rust_unions
.push_back (type
);
16179 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16180 snapshots) has been known to create a die giving a declaration
16181 for a class that has, as a child, a die giving a definition for a
16182 nested class. So we have to process our children even if the
16183 current die is a declaration. Normally, of course, a declaration
16184 won't have any children at all. */
16186 child_die
= die
->child
;
16188 while (child_die
!= NULL
&& child_die
->tag
)
16190 if (child_die
->tag
== DW_TAG_member
16191 || child_die
->tag
== DW_TAG_variable
16192 || child_die
->tag
== DW_TAG_inheritance
16193 || child_die
->tag
== DW_TAG_template_value_param
16194 || child_die
->tag
== DW_TAG_template_type_param
)
16199 process_die (child_die
, cu
);
16201 child_die
= sibling_die (child_die
);
16204 /* Do not consider external references. According to the DWARF standard,
16205 these DIEs are identified by the fact that they have no byte_size
16206 attribute, and a declaration attribute. */
16207 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16208 || !die_is_declaration (die
, cu
))
16210 struct symbol
*sym
= new_symbol (die
, type
, cu
);
16212 if (has_template_parameters
)
16214 struct symtab
*symtab
;
16215 if (sym
!= nullptr)
16216 symtab
= symbol_symtab (sym
);
16217 else if (cu
->line_header
!= nullptr)
16219 /* Any related symtab will do. */
16221 = cu
->line_header
->file_name_at (file_name_index (1))->symtab
;
16226 complaint (_("could not find suitable "
16227 "symtab for template parameter"
16228 " - DIE at %s [in module %s]"),
16229 sect_offset_str (die
->sect_off
),
16230 objfile_name (objfile
));
16233 if (symtab
!= nullptr)
16235 /* Make sure that the symtab is set on the new symbols.
16236 Even though they don't appear in this symtab directly,
16237 other parts of gdb assume that symbols do, and this is
16238 reasonably true. */
16239 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
16240 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
16246 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16247 update TYPE using some information only available in DIE's children. */
16250 update_enumeration_type_from_children (struct die_info
*die
,
16252 struct dwarf2_cu
*cu
)
16254 struct die_info
*child_die
;
16255 int unsigned_enum
= 1;
16259 auto_obstack obstack
;
16261 for (child_die
= die
->child
;
16262 child_die
!= NULL
&& child_die
->tag
;
16263 child_die
= sibling_die (child_die
))
16265 struct attribute
*attr
;
16267 const gdb_byte
*bytes
;
16268 struct dwarf2_locexpr_baton
*baton
;
16271 if (child_die
->tag
!= DW_TAG_enumerator
)
16274 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16278 name
= dwarf2_name (child_die
, cu
);
16280 name
= "<anonymous enumerator>";
16282 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16283 &value
, &bytes
, &baton
);
16289 else if ((mask
& value
) != 0)
16294 /* If we already know that the enum type is neither unsigned, nor
16295 a flag type, no need to look at the rest of the enumerates. */
16296 if (!unsigned_enum
&& !flag_enum
)
16301 TYPE_UNSIGNED (type
) = 1;
16303 TYPE_FLAG_ENUM (type
) = 1;
16306 /* Given a DW_AT_enumeration_type die, set its type. We do not
16307 complete the type's fields yet, or create any symbols. */
16309 static struct type
*
16310 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16312 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16314 struct attribute
*attr
;
16317 /* If the definition of this type lives in .debug_types, read that type.
16318 Don't follow DW_AT_specification though, that will take us back up
16319 the chain and we want to go down. */
16320 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16323 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16325 /* The type's CU may not be the same as CU.
16326 Ensure TYPE is recorded with CU in die_type_hash. */
16327 return set_die_type (die
, type
, cu
);
16330 type
= alloc_type (objfile
);
16332 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16333 name
= dwarf2_full_name (NULL
, die
, cu
);
16335 TYPE_NAME (type
) = name
;
16337 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16340 struct type
*underlying_type
= die_type (die
, cu
);
16342 TYPE_TARGET_TYPE (type
) = underlying_type
;
16345 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16348 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16352 TYPE_LENGTH (type
) = 0;
16355 maybe_set_alignment (cu
, die
, type
);
16357 /* The enumeration DIE can be incomplete. In Ada, any type can be
16358 declared as private in the package spec, and then defined only
16359 inside the package body. Such types are known as Taft Amendment
16360 Types. When another package uses such a type, an incomplete DIE
16361 may be generated by the compiler. */
16362 if (die_is_declaration (die
, cu
))
16363 TYPE_STUB (type
) = 1;
16365 /* Finish the creation of this type by using the enum's children.
16366 We must call this even when the underlying type has been provided
16367 so that we can determine if we're looking at a "flag" enum. */
16368 update_enumeration_type_from_children (die
, type
, cu
);
16370 /* If this type has an underlying type that is not a stub, then we
16371 may use its attributes. We always use the "unsigned" attribute
16372 in this situation, because ordinarily we guess whether the type
16373 is unsigned -- but the guess can be wrong and the underlying type
16374 can tell us the reality. However, we defer to a local size
16375 attribute if one exists, because this lets the compiler override
16376 the underlying type if needed. */
16377 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16379 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16380 if (TYPE_LENGTH (type
) == 0)
16381 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16382 if (TYPE_RAW_ALIGN (type
) == 0
16383 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16384 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16387 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16389 return set_die_type (die
, type
, cu
);
16392 /* Given a pointer to a die which begins an enumeration, process all
16393 the dies that define the members of the enumeration, and create the
16394 symbol for the enumeration type.
16396 NOTE: We reverse the order of the element list. */
16399 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16401 struct type
*this_type
;
16403 this_type
= get_die_type (die
, cu
);
16404 if (this_type
== NULL
)
16405 this_type
= read_enumeration_type (die
, cu
);
16407 if (die
->child
!= NULL
)
16409 struct die_info
*child_die
;
16410 struct symbol
*sym
;
16411 struct field
*fields
= NULL
;
16412 int num_fields
= 0;
16415 child_die
= die
->child
;
16416 while (child_die
&& child_die
->tag
)
16418 if (child_die
->tag
!= DW_TAG_enumerator
)
16420 process_die (child_die
, cu
);
16424 name
= dwarf2_name (child_die
, cu
);
16427 sym
= new_symbol (child_die
, this_type
, cu
);
16429 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16431 fields
= (struct field
*)
16433 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16434 * sizeof (struct field
));
16437 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16438 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16439 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16440 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16446 child_die
= sibling_die (child_die
);
16451 TYPE_NFIELDS (this_type
) = num_fields
;
16452 TYPE_FIELDS (this_type
) = (struct field
*)
16453 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16454 memcpy (TYPE_FIELDS (this_type
), fields
,
16455 sizeof (struct field
) * num_fields
);
16460 /* If we are reading an enum from a .debug_types unit, and the enum
16461 is a declaration, and the enum is not the signatured type in the
16462 unit, then we do not want to add a symbol for it. Adding a
16463 symbol would in some cases obscure the true definition of the
16464 enum, giving users an incomplete type when the definition is
16465 actually available. Note that we do not want to do this for all
16466 enums which are just declarations, because C++0x allows forward
16467 enum declarations. */
16468 if (cu
->per_cu
->is_debug_types
16469 && die_is_declaration (die
, cu
))
16471 struct signatured_type
*sig_type
;
16473 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16474 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16475 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16479 new_symbol (die
, this_type
, cu
);
16482 /* Extract all information from a DW_TAG_array_type DIE and put it in
16483 the DIE's type field. For now, this only handles one dimensional
16486 static struct type
*
16487 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16489 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16490 struct die_info
*child_die
;
16492 struct type
*element_type
, *range_type
, *index_type
;
16493 struct attribute
*attr
;
16495 struct dynamic_prop
*byte_stride_prop
= NULL
;
16496 unsigned int bit_stride
= 0;
16498 element_type
= die_type (die
, cu
);
16500 /* The die_type call above may have already set the type for this DIE. */
16501 type
= get_die_type (die
, cu
);
16505 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16509 struct type
*prop_type
16510 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
16513 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16514 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16518 complaint (_("unable to read array DW_AT_byte_stride "
16519 " - DIE at %s [in module %s]"),
16520 sect_offset_str (die
->sect_off
),
16521 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16522 /* Ignore this attribute. We will likely not be able to print
16523 arrays of this type correctly, but there is little we can do
16524 to help if we cannot read the attribute's value. */
16525 byte_stride_prop
= NULL
;
16529 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16531 bit_stride
= DW_UNSND (attr
);
16533 /* Irix 6.2 native cc creates array types without children for
16534 arrays with unspecified length. */
16535 if (die
->child
== NULL
)
16537 index_type
= objfile_type (objfile
)->builtin_int
;
16538 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16539 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16540 byte_stride_prop
, bit_stride
);
16541 return set_die_type (die
, type
, cu
);
16544 std::vector
<struct type
*> range_types
;
16545 child_die
= die
->child
;
16546 while (child_die
&& child_die
->tag
)
16548 if (child_die
->tag
== DW_TAG_subrange_type
)
16550 struct type
*child_type
= read_type_die (child_die
, cu
);
16552 if (child_type
!= NULL
)
16554 /* The range type was succesfully read. Save it for the
16555 array type creation. */
16556 range_types
.push_back (child_type
);
16559 child_die
= sibling_die (child_die
);
16562 /* Dwarf2 dimensions are output from left to right, create the
16563 necessary array types in backwards order. */
16565 type
= element_type
;
16567 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16571 while (i
< range_types
.size ())
16572 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16573 byte_stride_prop
, bit_stride
);
16577 size_t ndim
= range_types
.size ();
16579 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16580 byte_stride_prop
, bit_stride
);
16583 /* Understand Dwarf2 support for vector types (like they occur on
16584 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16585 array type. This is not part of the Dwarf2/3 standard yet, but a
16586 custom vendor extension. The main difference between a regular
16587 array and the vector variant is that vectors are passed by value
16589 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16591 make_vector_type (type
);
16593 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16594 implementation may choose to implement triple vectors using this
16596 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16599 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16600 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16602 complaint (_("DW_AT_byte_size for array type smaller "
16603 "than the total size of elements"));
16606 name
= dwarf2_name (die
, cu
);
16608 TYPE_NAME (type
) = name
;
16610 maybe_set_alignment (cu
, die
, type
);
16612 /* Install the type in the die. */
16613 set_die_type (die
, type
, cu
);
16615 /* set_die_type should be already done. */
16616 set_descriptive_type (type
, die
, cu
);
16621 static enum dwarf_array_dim_ordering
16622 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16624 struct attribute
*attr
;
16626 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16629 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16631 /* GNU F77 is a special case, as at 08/2004 array type info is the
16632 opposite order to the dwarf2 specification, but data is still
16633 laid out as per normal fortran.
16635 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16636 version checking. */
16638 if (cu
->language
== language_fortran
16639 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16641 return DW_ORD_row_major
;
16644 switch (cu
->language_defn
->la_array_ordering
)
16646 case array_column_major
:
16647 return DW_ORD_col_major
;
16648 case array_row_major
:
16650 return DW_ORD_row_major
;
16654 /* Extract all information from a DW_TAG_set_type DIE and put it in
16655 the DIE's type field. */
16657 static struct type
*
16658 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16660 struct type
*domain_type
, *set_type
;
16661 struct attribute
*attr
;
16663 domain_type
= die_type (die
, cu
);
16665 /* The die_type call above may have already set the type for this DIE. */
16666 set_type
= get_die_type (die
, cu
);
16670 set_type
= create_set_type (NULL
, domain_type
);
16672 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16674 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16676 maybe_set_alignment (cu
, die
, set_type
);
16678 return set_die_type (die
, set_type
, cu
);
16681 /* A helper for read_common_block that creates a locexpr baton.
16682 SYM is the symbol which we are marking as computed.
16683 COMMON_DIE is the DIE for the common block.
16684 COMMON_LOC is the location expression attribute for the common
16686 MEMBER_LOC is the location expression attribute for the particular
16687 member of the common block that we are processing.
16688 CU is the CU from which the above come. */
16691 mark_common_block_symbol_computed (struct symbol
*sym
,
16692 struct die_info
*common_die
,
16693 struct attribute
*common_loc
,
16694 struct attribute
*member_loc
,
16695 struct dwarf2_cu
*cu
)
16697 struct dwarf2_per_objfile
*dwarf2_per_objfile
16698 = cu
->per_cu
->dwarf2_per_objfile
;
16699 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16700 struct dwarf2_locexpr_baton
*baton
;
16702 unsigned int cu_off
;
16703 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16704 LONGEST offset
= 0;
16706 gdb_assert (common_loc
&& member_loc
);
16707 gdb_assert (attr_form_is_block (common_loc
));
16708 gdb_assert (attr_form_is_block (member_loc
)
16709 || attr_form_is_constant (member_loc
));
16711 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16712 baton
->per_cu
= cu
->per_cu
;
16713 gdb_assert (baton
->per_cu
);
16715 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16717 if (attr_form_is_constant (member_loc
))
16719 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16720 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16723 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16725 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16728 *ptr
++ = DW_OP_call4
;
16729 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16730 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16733 if (attr_form_is_constant (member_loc
))
16735 *ptr
++ = DW_OP_addr
;
16736 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16737 ptr
+= cu
->header
.addr_size
;
16741 /* We have to copy the data here, because DW_OP_call4 will only
16742 use a DW_AT_location attribute. */
16743 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16744 ptr
+= DW_BLOCK (member_loc
)->size
;
16747 *ptr
++ = DW_OP_plus
;
16748 gdb_assert (ptr
- baton
->data
== baton
->size
);
16750 SYMBOL_LOCATION_BATON (sym
) = baton
;
16751 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16754 /* Create appropriate locally-scoped variables for all the
16755 DW_TAG_common_block entries. Also create a struct common_block
16756 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16757 is used to sepate the common blocks name namespace from regular
16761 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16763 struct attribute
*attr
;
16765 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16768 /* Support the .debug_loc offsets. */
16769 if (attr_form_is_block (attr
))
16773 else if (attr_form_is_section_offset (attr
))
16775 dwarf2_complex_location_expr_complaint ();
16780 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16781 "common block member");
16786 if (die
->child
!= NULL
)
16788 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16789 struct die_info
*child_die
;
16790 size_t n_entries
= 0, size
;
16791 struct common_block
*common_block
;
16792 struct symbol
*sym
;
16794 for (child_die
= die
->child
;
16795 child_die
&& child_die
->tag
;
16796 child_die
= sibling_die (child_die
))
16799 size
= (sizeof (struct common_block
)
16800 + (n_entries
- 1) * sizeof (struct symbol
*));
16802 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16804 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16805 common_block
->n_entries
= 0;
16807 for (child_die
= die
->child
;
16808 child_die
&& child_die
->tag
;
16809 child_die
= sibling_die (child_die
))
16811 /* Create the symbol in the DW_TAG_common_block block in the current
16813 sym
= new_symbol (child_die
, NULL
, cu
);
16816 struct attribute
*member_loc
;
16818 common_block
->contents
[common_block
->n_entries
++] = sym
;
16820 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16824 /* GDB has handled this for a long time, but it is
16825 not specified by DWARF. It seems to have been
16826 emitted by gfortran at least as recently as:
16827 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16828 complaint (_("Variable in common block has "
16829 "DW_AT_data_member_location "
16830 "- DIE at %s [in module %s]"),
16831 sect_offset_str (child_die
->sect_off
),
16832 objfile_name (objfile
));
16834 if (attr_form_is_section_offset (member_loc
))
16835 dwarf2_complex_location_expr_complaint ();
16836 else if (attr_form_is_constant (member_loc
)
16837 || attr_form_is_block (member_loc
))
16840 mark_common_block_symbol_computed (sym
, die
, attr
,
16844 dwarf2_complex_location_expr_complaint ();
16849 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16850 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16854 /* Create a type for a C++ namespace. */
16856 static struct type
*
16857 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16859 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16860 const char *previous_prefix
, *name
;
16864 /* For extensions, reuse the type of the original namespace. */
16865 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16867 struct die_info
*ext_die
;
16868 struct dwarf2_cu
*ext_cu
= cu
;
16870 ext_die
= dwarf2_extension (die
, &ext_cu
);
16871 type
= read_type_die (ext_die
, ext_cu
);
16873 /* EXT_CU may not be the same as CU.
16874 Ensure TYPE is recorded with CU in die_type_hash. */
16875 return set_die_type (die
, type
, cu
);
16878 name
= namespace_name (die
, &is_anonymous
, cu
);
16880 /* Now build the name of the current namespace. */
16882 previous_prefix
= determine_prefix (die
, cu
);
16883 if (previous_prefix
[0] != '\0')
16884 name
= typename_concat (&objfile
->objfile_obstack
,
16885 previous_prefix
, name
, 0, cu
);
16887 /* Create the type. */
16888 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16890 return set_die_type (die
, type
, cu
);
16893 /* Read a namespace scope. */
16896 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16898 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16901 /* Add a symbol associated to this if we haven't seen the namespace
16902 before. Also, add a using directive if it's an anonymous
16905 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16909 type
= read_type_die (die
, cu
);
16910 new_symbol (die
, type
, cu
);
16912 namespace_name (die
, &is_anonymous
, cu
);
16915 const char *previous_prefix
= determine_prefix (die
, cu
);
16917 std::vector
<const char *> excludes
;
16918 add_using_directive (using_directives (cu
),
16919 previous_prefix
, TYPE_NAME (type
), NULL
,
16920 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16924 if (die
->child
!= NULL
)
16926 struct die_info
*child_die
= die
->child
;
16928 while (child_die
&& child_die
->tag
)
16930 process_die (child_die
, cu
);
16931 child_die
= sibling_die (child_die
);
16936 /* Read a Fortran module as type. This DIE can be only a declaration used for
16937 imported module. Still we need that type as local Fortran "use ... only"
16938 declaration imports depend on the created type in determine_prefix. */
16940 static struct type
*
16941 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16943 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16944 const char *module_name
;
16947 module_name
= dwarf2_name (die
, cu
);
16948 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16950 return set_die_type (die
, type
, cu
);
16953 /* Read a Fortran module. */
16956 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16958 struct die_info
*child_die
= die
->child
;
16961 type
= read_type_die (die
, cu
);
16962 new_symbol (die
, type
, cu
);
16964 while (child_die
&& child_die
->tag
)
16966 process_die (child_die
, cu
);
16967 child_die
= sibling_die (child_die
);
16971 /* Return the name of the namespace represented by DIE. Set
16972 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16975 static const char *
16976 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16978 struct die_info
*current_die
;
16979 const char *name
= NULL
;
16981 /* Loop through the extensions until we find a name. */
16983 for (current_die
= die
;
16984 current_die
!= NULL
;
16985 current_die
= dwarf2_extension (die
, &cu
))
16987 /* We don't use dwarf2_name here so that we can detect the absence
16988 of a name -> anonymous namespace. */
16989 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16995 /* Is it an anonymous namespace? */
16997 *is_anonymous
= (name
== NULL
);
16999 name
= CP_ANONYMOUS_NAMESPACE_STR
;
17004 /* Extract all information from a DW_TAG_pointer_type DIE and add to
17005 the user defined type vector. */
17007 static struct type
*
17008 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17010 struct gdbarch
*gdbarch
17011 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
17012 struct comp_unit_head
*cu_header
= &cu
->header
;
17014 struct attribute
*attr_byte_size
;
17015 struct attribute
*attr_address_class
;
17016 int byte_size
, addr_class
;
17017 struct type
*target_type
;
17019 target_type
= die_type (die
, cu
);
17021 /* The die_type call above may have already set the type for this DIE. */
17022 type
= get_die_type (die
, cu
);
17026 type
= lookup_pointer_type (target_type
);
17028 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17029 if (attr_byte_size
)
17030 byte_size
= DW_UNSND (attr_byte_size
);
17032 byte_size
= cu_header
->addr_size
;
17034 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
17035 if (attr_address_class
)
17036 addr_class
= DW_UNSND (attr_address_class
);
17038 addr_class
= DW_ADDR_none
;
17040 ULONGEST alignment
= get_alignment (cu
, die
);
17042 /* If the pointer size, alignment, or address class is different
17043 than the default, create a type variant marked as such and set
17044 the length accordingly. */
17045 if (TYPE_LENGTH (type
) != byte_size
17046 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
17047 && alignment
!= TYPE_RAW_ALIGN (type
))
17048 || addr_class
!= DW_ADDR_none
)
17050 if (gdbarch_address_class_type_flags_p (gdbarch
))
17054 type_flags
= gdbarch_address_class_type_flags
17055 (gdbarch
, byte_size
, addr_class
);
17056 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
17058 type
= make_type_with_address_space (type
, type_flags
);
17060 else if (TYPE_LENGTH (type
) != byte_size
)
17062 complaint (_("invalid pointer size %d"), byte_size
);
17064 else if (TYPE_RAW_ALIGN (type
) != alignment
)
17066 complaint (_("Invalid DW_AT_alignment"
17067 " - DIE at %s [in module %s]"),
17068 sect_offset_str (die
->sect_off
),
17069 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17073 /* Should we also complain about unhandled address classes? */
17077 TYPE_LENGTH (type
) = byte_size
;
17078 set_type_align (type
, alignment
);
17079 return set_die_type (die
, type
, cu
);
17082 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
17083 the user defined type vector. */
17085 static struct type
*
17086 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17089 struct type
*to_type
;
17090 struct type
*domain
;
17092 to_type
= die_type (die
, cu
);
17093 domain
= die_containing_type (die
, cu
);
17095 /* The calls above may have already set the type for this DIE. */
17096 type
= get_die_type (die
, cu
);
17100 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
17101 type
= lookup_methodptr_type (to_type
);
17102 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
17104 struct type
*new_type
17105 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
17107 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
17108 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
17109 TYPE_VARARGS (to_type
));
17110 type
= lookup_methodptr_type (new_type
);
17113 type
= lookup_memberptr_type (to_type
, domain
);
17115 return set_die_type (die
, type
, cu
);
17118 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
17119 the user defined type vector. */
17121 static struct type
*
17122 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17123 enum type_code refcode
)
17125 struct comp_unit_head
*cu_header
= &cu
->header
;
17126 struct type
*type
, *target_type
;
17127 struct attribute
*attr
;
17129 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17131 target_type
= die_type (die
, cu
);
17133 /* The die_type call above may have already set the type for this DIE. */
17134 type
= get_die_type (die
, cu
);
17138 type
= lookup_reference_type (target_type
, refcode
);
17139 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17142 TYPE_LENGTH (type
) = DW_UNSND (attr
);
17146 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17148 maybe_set_alignment (cu
, die
, type
);
17149 return set_die_type (die
, type
, cu
);
17152 /* Add the given cv-qualifiers to the element type of the array. GCC
17153 outputs DWARF type qualifiers that apply to an array, not the
17154 element type. But GDB relies on the array element type to carry
17155 the cv-qualifiers. This mimics section 6.7.3 of the C99
17158 static struct type
*
17159 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17160 struct type
*base_type
, int cnst
, int voltl
)
17162 struct type
*el_type
, *inner_array
;
17164 base_type
= copy_type (base_type
);
17165 inner_array
= base_type
;
17167 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
17169 TYPE_TARGET_TYPE (inner_array
) =
17170 copy_type (TYPE_TARGET_TYPE (inner_array
));
17171 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17174 el_type
= TYPE_TARGET_TYPE (inner_array
);
17175 cnst
|= TYPE_CONST (el_type
);
17176 voltl
|= TYPE_VOLATILE (el_type
);
17177 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17179 return set_die_type (die
, base_type
, cu
);
17182 static struct type
*
17183 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17185 struct type
*base_type
, *cv_type
;
17187 base_type
= die_type (die
, cu
);
17189 /* The die_type call above may have already set the type for this DIE. */
17190 cv_type
= get_die_type (die
, cu
);
17194 /* In case the const qualifier is applied to an array type, the element type
17195 is so qualified, not the array type (section 6.7.3 of C99). */
17196 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17197 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17199 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17200 return set_die_type (die
, cv_type
, cu
);
17203 static struct type
*
17204 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17206 struct type
*base_type
, *cv_type
;
17208 base_type
= die_type (die
, cu
);
17210 /* The die_type call above may have already set the type for this DIE. */
17211 cv_type
= get_die_type (die
, cu
);
17215 /* In case the volatile qualifier is applied to an array type, the
17216 element type is so qualified, not the array type (section 6.7.3
17218 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17219 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17221 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17222 return set_die_type (die
, cv_type
, cu
);
17225 /* Handle DW_TAG_restrict_type. */
17227 static struct type
*
17228 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17230 struct type
*base_type
, *cv_type
;
17232 base_type
= die_type (die
, cu
);
17234 /* The die_type call above may have already set the type for this DIE. */
17235 cv_type
= get_die_type (die
, cu
);
17239 cv_type
= make_restrict_type (base_type
);
17240 return set_die_type (die
, cv_type
, cu
);
17243 /* Handle DW_TAG_atomic_type. */
17245 static struct type
*
17246 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17248 struct type
*base_type
, *cv_type
;
17250 base_type
= die_type (die
, cu
);
17252 /* The die_type call above may have already set the type for this DIE. */
17253 cv_type
= get_die_type (die
, cu
);
17257 cv_type
= make_atomic_type (base_type
);
17258 return set_die_type (die
, cv_type
, cu
);
17261 /* Extract all information from a DW_TAG_string_type DIE and add to
17262 the user defined type vector. It isn't really a user defined type,
17263 but it behaves like one, with other DIE's using an AT_user_def_type
17264 attribute to reference it. */
17266 static struct type
*
17267 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17269 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17270 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17271 struct type
*type
, *range_type
, *index_type
, *char_type
;
17272 struct attribute
*attr
;
17273 unsigned int length
;
17275 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17278 length
= DW_UNSND (attr
);
17282 /* Check for the DW_AT_byte_size attribute. */
17283 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17286 length
= DW_UNSND (attr
);
17294 index_type
= objfile_type (objfile
)->builtin_int
;
17295 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17296 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17297 type
= create_string_type (NULL
, char_type
, range_type
);
17299 return set_die_type (die
, type
, cu
);
17302 /* Assuming that DIE corresponds to a function, returns nonzero
17303 if the function is prototyped. */
17306 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17308 struct attribute
*attr
;
17310 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17311 if (attr
&& (DW_UNSND (attr
) != 0))
17314 /* The DWARF standard implies that the DW_AT_prototyped attribute
17315 is only meaninful for C, but the concept also extends to other
17316 languages that allow unprototyped functions (Eg: Objective C).
17317 For all other languages, assume that functions are always
17319 if (cu
->language
!= language_c
17320 && cu
->language
!= language_objc
17321 && cu
->language
!= language_opencl
)
17324 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17325 prototyped and unprototyped functions; default to prototyped,
17326 since that is more common in modern code (and RealView warns
17327 about unprototyped functions). */
17328 if (producer_is_realview (cu
->producer
))
17334 /* Handle DIES due to C code like:
17338 int (*funcp)(int a, long l);
17342 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17344 static struct type
*
17345 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17347 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17348 struct type
*type
; /* Type that this function returns. */
17349 struct type
*ftype
; /* Function that returns above type. */
17350 struct attribute
*attr
;
17352 type
= die_type (die
, cu
);
17354 /* The die_type call above may have already set the type for this DIE. */
17355 ftype
= get_die_type (die
, cu
);
17359 ftype
= lookup_function_type (type
);
17361 if (prototyped_function_p (die
, cu
))
17362 TYPE_PROTOTYPED (ftype
) = 1;
17364 /* Store the calling convention in the type if it's available in
17365 the subroutine die. Otherwise set the calling convention to
17366 the default value DW_CC_normal. */
17367 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17369 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17370 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17371 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17373 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17375 /* Record whether the function returns normally to its caller or not
17376 if the DWARF producer set that information. */
17377 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17378 if (attr
&& (DW_UNSND (attr
) != 0))
17379 TYPE_NO_RETURN (ftype
) = 1;
17381 /* We need to add the subroutine type to the die immediately so
17382 we don't infinitely recurse when dealing with parameters
17383 declared as the same subroutine type. */
17384 set_die_type (die
, ftype
, cu
);
17386 if (die
->child
!= NULL
)
17388 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17389 struct die_info
*child_die
;
17390 int nparams
, iparams
;
17392 /* Count the number of parameters.
17393 FIXME: GDB currently ignores vararg functions, but knows about
17394 vararg member functions. */
17396 child_die
= die
->child
;
17397 while (child_die
&& child_die
->tag
)
17399 if (child_die
->tag
== DW_TAG_formal_parameter
)
17401 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17402 TYPE_VARARGS (ftype
) = 1;
17403 child_die
= sibling_die (child_die
);
17406 /* Allocate storage for parameters and fill them in. */
17407 TYPE_NFIELDS (ftype
) = nparams
;
17408 TYPE_FIELDS (ftype
) = (struct field
*)
17409 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17411 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17412 even if we error out during the parameters reading below. */
17413 for (iparams
= 0; iparams
< nparams
; iparams
++)
17414 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17417 child_die
= die
->child
;
17418 while (child_die
&& child_die
->tag
)
17420 if (child_die
->tag
== DW_TAG_formal_parameter
)
17422 struct type
*arg_type
;
17424 /* DWARF version 2 has no clean way to discern C++
17425 static and non-static member functions. G++ helps
17426 GDB by marking the first parameter for non-static
17427 member functions (which is the this pointer) as
17428 artificial. We pass this information to
17429 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17431 DWARF version 3 added DW_AT_object_pointer, which GCC
17432 4.5 does not yet generate. */
17433 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17435 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17437 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17438 arg_type
= die_type (child_die
, cu
);
17440 /* RealView does not mark THIS as const, which the testsuite
17441 expects. GCC marks THIS as const in method definitions,
17442 but not in the class specifications (GCC PR 43053). */
17443 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17444 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17447 struct dwarf2_cu
*arg_cu
= cu
;
17448 const char *name
= dwarf2_name (child_die
, cu
);
17450 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17453 /* If the compiler emits this, use it. */
17454 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17457 else if (name
&& strcmp (name
, "this") == 0)
17458 /* Function definitions will have the argument names. */
17460 else if (name
== NULL
&& iparams
== 0)
17461 /* Declarations may not have the names, so like
17462 elsewhere in GDB, assume an artificial first
17463 argument is "this". */
17467 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17471 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17474 child_die
= sibling_die (child_die
);
17481 static struct type
*
17482 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17484 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17485 const char *name
= NULL
;
17486 struct type
*this_type
, *target_type
;
17488 name
= dwarf2_full_name (NULL
, die
, cu
);
17489 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17490 TYPE_TARGET_STUB (this_type
) = 1;
17491 set_die_type (die
, this_type
, cu
);
17492 target_type
= die_type (die
, cu
);
17493 if (target_type
!= this_type
)
17494 TYPE_TARGET_TYPE (this_type
) = target_type
;
17497 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17498 spec and cause infinite loops in GDB. */
17499 complaint (_("Self-referential DW_TAG_typedef "
17500 "- DIE at %s [in module %s]"),
17501 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17502 TYPE_TARGET_TYPE (this_type
) = NULL
;
17507 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17508 (which may be different from NAME) to the architecture back-end to allow
17509 it to guess the correct format if necessary. */
17511 static struct type
*
17512 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17513 const char *name_hint
)
17515 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17516 const struct floatformat
**format
;
17519 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17521 type
= init_float_type (objfile
, bits
, name
, format
);
17523 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17528 /* Allocate an integer type of size BITS and name NAME. */
17530 static struct type
*
17531 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17532 int bits
, int unsigned_p
, const char *name
)
17536 /* Versions of Intel's C Compiler generate an integer type called "void"
17537 instead of using DW_TAG_unspecified_type. This has been seen on
17538 at least versions 14, 17, and 18. */
17539 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17540 && strcmp (name
, "void") == 0)
17541 type
= objfile_type (objfile
)->builtin_void
;
17543 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17548 /* Initialise and return a floating point type of size BITS suitable for
17549 use as a component of a complex number. The NAME_HINT is passed through
17550 when initialising the floating point type and is the name of the complex
17553 As DWARF doesn't currently provide an explicit name for the components
17554 of a complex number, but it can be helpful to have these components
17555 named, we try to select a suitable name based on the size of the
17557 static struct type
*
17558 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17559 struct objfile
*objfile
,
17560 int bits
, const char *name_hint
)
17562 gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17563 struct type
*tt
= nullptr;
17565 /* Try to find a suitable floating point builtin type of size BITS.
17566 We're going to use the name of this type as the name for the complex
17567 target type that we are about to create. */
17568 switch (cu
->language
)
17570 case language_fortran
:
17574 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17577 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17579 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17581 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17589 tt
= builtin_type (gdbarch
)->builtin_float
;
17592 tt
= builtin_type (gdbarch
)->builtin_double
;
17594 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17596 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17602 /* If the type we found doesn't match the size we were looking for, then
17603 pretend we didn't find a type at all, the complex target type we
17604 create will then be nameless. */
17605 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17608 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
17609 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
);
17612 /* Find a representation of a given base type and install
17613 it in the TYPE field of the die. */
17615 static struct type
*
17616 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17618 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17620 struct attribute
*attr
;
17621 int encoding
= 0, bits
= 0;
17624 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17627 encoding
= DW_UNSND (attr
);
17629 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17632 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17634 name
= dwarf2_name (die
, cu
);
17637 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17642 case DW_ATE_address
:
17643 /* Turn DW_ATE_address into a void * pointer. */
17644 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17645 type
= init_pointer_type (objfile
, bits
, name
, type
);
17647 case DW_ATE_boolean
:
17648 type
= init_boolean_type (objfile
, bits
, 1, name
);
17650 case DW_ATE_complex_float
:
17651 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
);
17652 type
= init_complex_type (objfile
, name
, type
);
17654 case DW_ATE_decimal_float
:
17655 type
= init_decfloat_type (objfile
, bits
, name
);
17658 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17660 case DW_ATE_signed
:
17661 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17663 case DW_ATE_unsigned
:
17664 if (cu
->language
== language_fortran
17666 && startswith (name
, "character("))
17667 type
= init_character_type (objfile
, bits
, 1, name
);
17669 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17671 case DW_ATE_signed_char
:
17672 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17673 || cu
->language
== language_pascal
17674 || cu
->language
== language_fortran
)
17675 type
= init_character_type (objfile
, bits
, 0, name
);
17677 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17679 case DW_ATE_unsigned_char
:
17680 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17681 || cu
->language
== language_pascal
17682 || cu
->language
== language_fortran
17683 || cu
->language
== language_rust
)
17684 type
= init_character_type (objfile
, bits
, 1, name
);
17686 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17690 gdbarch
*arch
= get_objfile_arch (objfile
);
17693 type
= builtin_type (arch
)->builtin_char16
;
17694 else if (bits
== 32)
17695 type
= builtin_type (arch
)->builtin_char32
;
17698 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17700 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17702 return set_die_type (die
, type
, cu
);
17707 complaint (_("unsupported DW_AT_encoding: '%s'"),
17708 dwarf_type_encoding_name (encoding
));
17709 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17713 if (name
&& strcmp (name
, "char") == 0)
17714 TYPE_NOSIGN (type
) = 1;
17716 maybe_set_alignment (cu
, die
, type
);
17718 return set_die_type (die
, type
, cu
);
17721 /* Parse dwarf attribute if it's a block, reference or constant and put the
17722 resulting value of the attribute into struct bound_prop.
17723 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17726 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17727 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17728 struct type
*default_type
)
17730 struct dwarf2_property_baton
*baton
;
17731 struct obstack
*obstack
17732 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17734 gdb_assert (default_type
!= NULL
);
17736 if (attr
== NULL
|| prop
== NULL
)
17739 if (attr_form_is_block (attr
))
17741 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17742 baton
->property_type
= default_type
;
17743 baton
->locexpr
.per_cu
= cu
->per_cu
;
17744 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17745 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17746 baton
->locexpr
.is_reference
= false;
17747 prop
->data
.baton
= baton
;
17748 prop
->kind
= PROP_LOCEXPR
;
17749 gdb_assert (prop
->data
.baton
!= NULL
);
17751 else if (attr_form_is_ref (attr
))
17753 struct dwarf2_cu
*target_cu
= cu
;
17754 struct die_info
*target_die
;
17755 struct attribute
*target_attr
;
17757 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17758 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17759 if (target_attr
== NULL
)
17760 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17762 if (target_attr
== NULL
)
17765 switch (target_attr
->name
)
17767 case DW_AT_location
:
17768 if (attr_form_is_section_offset (target_attr
))
17770 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17771 baton
->property_type
= die_type (target_die
, target_cu
);
17772 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17773 prop
->data
.baton
= baton
;
17774 prop
->kind
= PROP_LOCLIST
;
17775 gdb_assert (prop
->data
.baton
!= NULL
);
17777 else if (attr_form_is_block (target_attr
))
17779 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17780 baton
->property_type
= die_type (target_die
, target_cu
);
17781 baton
->locexpr
.per_cu
= cu
->per_cu
;
17782 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17783 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17784 baton
->locexpr
.is_reference
= true;
17785 prop
->data
.baton
= baton
;
17786 prop
->kind
= PROP_LOCEXPR
;
17787 gdb_assert (prop
->data
.baton
!= NULL
);
17791 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17792 "dynamic property");
17796 case DW_AT_data_member_location
:
17800 if (!handle_data_member_location (target_die
, target_cu
,
17804 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17805 baton
->property_type
= read_type_die (target_die
->parent
,
17807 baton
->offset_info
.offset
= offset
;
17808 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17809 prop
->data
.baton
= baton
;
17810 prop
->kind
= PROP_ADDR_OFFSET
;
17815 else if (attr_form_is_constant (attr
))
17817 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17818 prop
->kind
= PROP_CONST
;
17822 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17823 dwarf2_name (die
, cu
));
17830 /* Find an integer type the same size as the address size given in the
17831 compilation unit header for PER_CU. UNSIGNED_P controls if the integer
17832 is unsigned or not. */
17834 static struct type
*
17835 dwarf2_per_cu_addr_sized_int_type (struct dwarf2_per_cu_data
*per_cu
,
17838 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
17839 int addr_size
= dwarf2_per_cu_addr_size (per_cu
);
17840 struct type
*int_type
;
17842 /* Helper macro to examine the various builtin types. */
17843 #define TRY_TYPE(F) \
17844 int_type = (unsigned_p \
17845 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17846 : objfile_type (objfile)->builtin_ ## F); \
17847 if (int_type != NULL && TYPE_LENGTH (int_type) == addr_size) \
17854 TRY_TYPE (long_long
);
17858 gdb_assert_not_reached ("unable to find suitable integer type");
17861 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17862 present (which is valid) then compute the default type based on the
17863 compilation units address size. */
17865 static struct type
*
17866 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17868 struct type
*index_type
= die_type (die
, cu
);
17870 /* Dwarf-2 specifications explicitly allows to create subrange types
17871 without specifying a base type.
17872 In that case, the base type must be set to the type of
17873 the lower bound, upper bound or count, in that order, if any of these
17874 three attributes references an object that has a type.
17875 If no base type is found, the Dwarf-2 specifications say that
17876 a signed integer type of size equal to the size of an address should
17878 For the following C code: `extern char gdb_int [];'
17879 GCC produces an empty range DIE.
17880 FIXME: muller/2010-05-28: Possible references to object for low bound,
17881 high bound or count are not yet handled by this code. */
17882 if (TYPE_CODE (index_type
) == TYPE_CODE_VOID
)
17883 index_type
= dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
17888 /* Read the given DW_AT_subrange DIE. */
17890 static struct type
*
17891 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17893 struct type
*base_type
, *orig_base_type
;
17894 struct type
*range_type
;
17895 struct attribute
*attr
;
17896 struct dynamic_prop low
, high
;
17897 int low_default_is_valid
;
17898 int high_bound_is_count
= 0;
17900 ULONGEST negative_mask
;
17902 orig_base_type
= read_subrange_index_type (die
, cu
);
17904 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17905 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17906 creating the range type, but we use the result of check_typedef
17907 when examining properties of the type. */
17908 base_type
= check_typedef (orig_base_type
);
17910 /* The die_type call above may have already set the type for this DIE. */
17911 range_type
= get_die_type (die
, cu
);
17915 low
.kind
= PROP_CONST
;
17916 high
.kind
= PROP_CONST
;
17917 high
.data
.const_val
= 0;
17919 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17920 omitting DW_AT_lower_bound. */
17921 switch (cu
->language
)
17924 case language_cplus
:
17925 low
.data
.const_val
= 0;
17926 low_default_is_valid
= 1;
17928 case language_fortran
:
17929 low
.data
.const_val
= 1;
17930 low_default_is_valid
= 1;
17933 case language_objc
:
17934 case language_rust
:
17935 low
.data
.const_val
= 0;
17936 low_default_is_valid
= (cu
->header
.version
>= 4);
17940 case language_pascal
:
17941 low
.data
.const_val
= 1;
17942 low_default_is_valid
= (cu
->header
.version
>= 4);
17945 low
.data
.const_val
= 0;
17946 low_default_is_valid
= 0;
17950 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17952 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17953 else if (!low_default_is_valid
)
17954 complaint (_("Missing DW_AT_lower_bound "
17955 "- DIE at %s [in module %s]"),
17956 sect_offset_str (die
->sect_off
),
17957 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17959 struct attribute
*attr_ub
, *attr_count
;
17960 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17961 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17963 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17964 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17966 /* If bounds are constant do the final calculation here. */
17967 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17968 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17970 high_bound_is_count
= 1;
17974 if (attr_ub
!= NULL
)
17975 complaint (_("Unresolved DW_AT_upper_bound "
17976 "- DIE at %s [in module %s]"),
17977 sect_offset_str (die
->sect_off
),
17978 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17979 if (attr_count
!= NULL
)
17980 complaint (_("Unresolved DW_AT_count "
17981 "- DIE at %s [in module %s]"),
17982 sect_offset_str (die
->sect_off
),
17983 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17988 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17989 if (bias_attr
!= nullptr && attr_form_is_constant (bias_attr
))
17990 bias
= dwarf2_get_attr_constant_value (bias_attr
, 0);
17992 /* Normally, the DWARF producers are expected to use a signed
17993 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17994 But this is unfortunately not always the case, as witnessed
17995 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17996 is used instead. To work around that ambiguity, we treat
17997 the bounds as signed, and thus sign-extend their values, when
17998 the base type is signed. */
18000 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
18001 if (low
.kind
== PROP_CONST
18002 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
18003 low
.data
.const_val
|= negative_mask
;
18004 if (high
.kind
== PROP_CONST
18005 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
18006 high
.data
.const_val
|= negative_mask
;
18008 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
18010 if (high_bound_is_count
)
18011 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
18013 /* Ada expects an empty array on no boundary attributes. */
18014 if (attr
== NULL
&& cu
->language
!= language_ada
)
18015 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
18017 name
= dwarf2_name (die
, cu
);
18019 TYPE_NAME (range_type
) = name
;
18021 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
18023 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
18025 maybe_set_alignment (cu
, die
, range_type
);
18027 set_die_type (die
, range_type
, cu
);
18029 /* set_die_type should be already done. */
18030 set_descriptive_type (range_type
, die
, cu
);
18035 static struct type
*
18036 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18040 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
18042 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
18044 /* In Ada, an unspecified type is typically used when the description
18045 of the type is defered to a different unit. When encountering
18046 such a type, we treat it as a stub, and try to resolve it later on,
18048 if (cu
->language
== language_ada
)
18049 TYPE_STUB (type
) = 1;
18051 return set_die_type (die
, type
, cu
);
18054 /* Read a single die and all its descendents. Set the die's sibling
18055 field to NULL; set other fields in the die correctly, and set all
18056 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
18057 location of the info_ptr after reading all of those dies. PARENT
18058 is the parent of the die in question. */
18060 static struct die_info
*
18061 read_die_and_children (const struct die_reader_specs
*reader
,
18062 const gdb_byte
*info_ptr
,
18063 const gdb_byte
**new_info_ptr
,
18064 struct die_info
*parent
)
18066 struct die_info
*die
;
18067 const gdb_byte
*cur_ptr
;
18070 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
18073 *new_info_ptr
= cur_ptr
;
18076 store_in_ref_table (die
, reader
->cu
);
18079 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
18083 *new_info_ptr
= cur_ptr
;
18086 die
->sibling
= NULL
;
18087 die
->parent
= parent
;
18091 /* Read a die, all of its descendents, and all of its siblings; set
18092 all of the fields of all of the dies correctly. Arguments are as
18093 in read_die_and_children. */
18095 static struct die_info
*
18096 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
18097 const gdb_byte
*info_ptr
,
18098 const gdb_byte
**new_info_ptr
,
18099 struct die_info
*parent
)
18101 struct die_info
*first_die
, *last_sibling
;
18102 const gdb_byte
*cur_ptr
;
18104 cur_ptr
= info_ptr
;
18105 first_die
= last_sibling
= NULL
;
18109 struct die_info
*die
18110 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
18114 *new_info_ptr
= cur_ptr
;
18121 last_sibling
->sibling
= die
;
18123 last_sibling
= die
;
18127 /* Read a die, all of its descendents, and all of its siblings; set
18128 all of the fields of all of the dies correctly. Arguments are as
18129 in read_die_and_children.
18130 This the main entry point for reading a DIE and all its children. */
18132 static struct die_info
*
18133 read_die_and_siblings (const struct die_reader_specs
*reader
,
18134 const gdb_byte
*info_ptr
,
18135 const gdb_byte
**new_info_ptr
,
18136 struct die_info
*parent
)
18138 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
18139 new_info_ptr
, parent
);
18141 if (dwarf_die_debug
)
18143 fprintf_unfiltered (gdb_stdlog
,
18144 "Read die from %s@0x%x of %s:\n",
18145 get_section_name (reader
->die_section
),
18146 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18147 bfd_get_filename (reader
->abfd
));
18148 dump_die (die
, dwarf_die_debug
);
18154 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
18156 The caller is responsible for filling in the extra attributes
18157 and updating (*DIEP)->num_attrs.
18158 Set DIEP to point to a newly allocated die with its information,
18159 except for its child, sibling, and parent fields.
18160 Set HAS_CHILDREN to tell whether the die has children or not. */
18162 static const gdb_byte
*
18163 read_full_die_1 (const struct die_reader_specs
*reader
,
18164 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18165 int *has_children
, int num_extra_attrs
)
18167 unsigned int abbrev_number
, bytes_read
, i
;
18168 struct abbrev_info
*abbrev
;
18169 struct die_info
*die
;
18170 struct dwarf2_cu
*cu
= reader
->cu
;
18171 bfd
*abfd
= reader
->abfd
;
18173 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
18174 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18175 info_ptr
+= bytes_read
;
18176 if (!abbrev_number
)
18183 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
18185 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
18187 bfd_get_filename (abfd
));
18189 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
18190 die
->sect_off
= sect_off
;
18191 die
->tag
= abbrev
->tag
;
18192 die
->abbrev
= abbrev_number
;
18194 /* Make the result usable.
18195 The caller needs to update num_attrs after adding the extra
18197 die
->num_attrs
= abbrev
->num_attrs
;
18199 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18200 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
18204 *has_children
= abbrev
->has_children
;
18208 /* Read a die and all its attributes.
18209 Set DIEP to point to a newly allocated die with its information,
18210 except for its child, sibling, and parent fields.
18211 Set HAS_CHILDREN to tell whether the die has children or not. */
18213 static const gdb_byte
*
18214 read_full_die (const struct die_reader_specs
*reader
,
18215 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18218 const gdb_byte
*result
;
18220 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
18222 if (dwarf_die_debug
)
18224 fprintf_unfiltered (gdb_stdlog
,
18225 "Read die from %s@0x%x of %s:\n",
18226 get_section_name (reader
->die_section
),
18227 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18228 bfd_get_filename (reader
->abfd
));
18229 dump_die (*diep
, dwarf_die_debug
);
18235 /* Abbreviation tables.
18237 In DWARF version 2, the description of the debugging information is
18238 stored in a separate .debug_abbrev section. Before we read any
18239 dies from a section we read in all abbreviations and install them
18240 in a hash table. */
18242 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
18244 struct abbrev_info
*
18245 abbrev_table::alloc_abbrev ()
18247 struct abbrev_info
*abbrev
;
18249 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
18250 memset (abbrev
, 0, sizeof (struct abbrev_info
));
18255 /* Add an abbreviation to the table. */
18258 abbrev_table::add_abbrev (unsigned int abbrev_number
,
18259 struct abbrev_info
*abbrev
)
18261 unsigned int hash_number
;
18263 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18264 abbrev
->next
= m_abbrevs
[hash_number
];
18265 m_abbrevs
[hash_number
] = abbrev
;
18268 /* Look up an abbrev in the table.
18269 Returns NULL if the abbrev is not found. */
18271 struct abbrev_info
*
18272 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
18274 unsigned int hash_number
;
18275 struct abbrev_info
*abbrev
;
18277 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18278 abbrev
= m_abbrevs
[hash_number
];
18282 if (abbrev
->number
== abbrev_number
)
18284 abbrev
= abbrev
->next
;
18289 /* Read in an abbrev table. */
18291 static abbrev_table_up
18292 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18293 struct dwarf2_section_info
*section
,
18294 sect_offset sect_off
)
18296 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18297 bfd
*abfd
= get_section_bfd_owner (section
);
18298 const gdb_byte
*abbrev_ptr
;
18299 struct abbrev_info
*cur_abbrev
;
18300 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
18301 unsigned int abbrev_form
;
18302 struct attr_abbrev
*cur_attrs
;
18303 unsigned int allocated_attrs
;
18305 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
18307 dwarf2_read_section (objfile
, section
);
18308 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
18309 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18310 abbrev_ptr
+= bytes_read
;
18312 allocated_attrs
= ATTR_ALLOC_CHUNK
;
18313 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
18315 /* Loop until we reach an abbrev number of 0. */
18316 while (abbrev_number
)
18318 cur_abbrev
= abbrev_table
->alloc_abbrev ();
18320 /* read in abbrev header */
18321 cur_abbrev
->number
= abbrev_number
;
18323 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18324 abbrev_ptr
+= bytes_read
;
18325 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18328 /* now read in declarations */
18331 LONGEST implicit_const
;
18333 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18334 abbrev_ptr
+= bytes_read
;
18335 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18336 abbrev_ptr
+= bytes_read
;
18337 if (abbrev_form
== DW_FORM_implicit_const
)
18339 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18341 abbrev_ptr
+= bytes_read
;
18345 /* Initialize it due to a false compiler warning. */
18346 implicit_const
= -1;
18349 if (abbrev_name
== 0)
18352 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18354 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18356 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18359 cur_attrs
[cur_abbrev
->num_attrs
].name
18360 = (enum dwarf_attribute
) abbrev_name
;
18361 cur_attrs
[cur_abbrev
->num_attrs
].form
18362 = (enum dwarf_form
) abbrev_form
;
18363 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18364 ++cur_abbrev
->num_attrs
;
18367 cur_abbrev
->attrs
=
18368 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18369 cur_abbrev
->num_attrs
);
18370 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18371 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18373 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18375 /* Get next abbreviation.
18376 Under Irix6 the abbreviations for a compilation unit are not
18377 always properly terminated with an abbrev number of 0.
18378 Exit loop if we encounter an abbreviation which we have
18379 already read (which means we are about to read the abbreviations
18380 for the next compile unit) or if the end of the abbreviation
18381 table is reached. */
18382 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18384 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18385 abbrev_ptr
+= bytes_read
;
18386 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18391 return abbrev_table
;
18394 /* Returns nonzero if TAG represents a type that we might generate a partial
18398 is_type_tag_for_partial (int tag
)
18403 /* Some types that would be reasonable to generate partial symbols for,
18404 that we don't at present. */
18405 case DW_TAG_array_type
:
18406 case DW_TAG_file_type
:
18407 case DW_TAG_ptr_to_member_type
:
18408 case DW_TAG_set_type
:
18409 case DW_TAG_string_type
:
18410 case DW_TAG_subroutine_type
:
18412 case DW_TAG_base_type
:
18413 case DW_TAG_class_type
:
18414 case DW_TAG_interface_type
:
18415 case DW_TAG_enumeration_type
:
18416 case DW_TAG_structure_type
:
18417 case DW_TAG_subrange_type
:
18418 case DW_TAG_typedef
:
18419 case DW_TAG_union_type
:
18426 /* Load all DIEs that are interesting for partial symbols into memory. */
18428 static struct partial_die_info
*
18429 load_partial_dies (const struct die_reader_specs
*reader
,
18430 const gdb_byte
*info_ptr
, int building_psymtab
)
18432 struct dwarf2_cu
*cu
= reader
->cu
;
18433 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18434 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18435 unsigned int bytes_read
;
18436 unsigned int load_all
= 0;
18437 int nesting_level
= 1;
18442 gdb_assert (cu
->per_cu
!= NULL
);
18443 if (cu
->per_cu
->load_all_dies
)
18447 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18451 &cu
->comp_unit_obstack
,
18452 hashtab_obstack_allocate
,
18453 dummy_obstack_deallocate
);
18457 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18459 /* A NULL abbrev means the end of a series of children. */
18460 if (abbrev
== NULL
)
18462 if (--nesting_level
== 0)
18465 info_ptr
+= bytes_read
;
18466 last_die
= parent_die
;
18467 parent_die
= parent_die
->die_parent
;
18471 /* Check for template arguments. We never save these; if
18472 they're seen, we just mark the parent, and go on our way. */
18473 if (parent_die
!= NULL
18474 && cu
->language
== language_cplus
18475 && (abbrev
->tag
== DW_TAG_template_type_param
18476 || abbrev
->tag
== DW_TAG_template_value_param
))
18478 parent_die
->has_template_arguments
= 1;
18482 /* We don't need a partial DIE for the template argument. */
18483 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18488 /* We only recurse into c++ subprograms looking for template arguments.
18489 Skip their other children. */
18491 && cu
->language
== language_cplus
18492 && parent_die
!= NULL
18493 && parent_die
->tag
== DW_TAG_subprogram
)
18495 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18499 /* Check whether this DIE is interesting enough to save. Normally
18500 we would not be interested in members here, but there may be
18501 later variables referencing them via DW_AT_specification (for
18502 static members). */
18504 && !is_type_tag_for_partial (abbrev
->tag
)
18505 && abbrev
->tag
!= DW_TAG_constant
18506 && abbrev
->tag
!= DW_TAG_enumerator
18507 && abbrev
->tag
!= DW_TAG_subprogram
18508 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18509 && abbrev
->tag
!= DW_TAG_lexical_block
18510 && abbrev
->tag
!= DW_TAG_variable
18511 && abbrev
->tag
!= DW_TAG_namespace
18512 && abbrev
->tag
!= DW_TAG_module
18513 && abbrev
->tag
!= DW_TAG_member
18514 && abbrev
->tag
!= DW_TAG_imported_unit
18515 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18517 /* Otherwise we skip to the next sibling, if any. */
18518 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18522 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18525 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18527 /* This two-pass algorithm for processing partial symbols has a
18528 high cost in cache pressure. Thus, handle some simple cases
18529 here which cover the majority of C partial symbols. DIEs
18530 which neither have specification tags in them, nor could have
18531 specification tags elsewhere pointing at them, can simply be
18532 processed and discarded.
18534 This segment is also optional; scan_partial_symbols and
18535 add_partial_symbol will handle these DIEs if we chain
18536 them in normally. When compilers which do not emit large
18537 quantities of duplicate debug information are more common,
18538 this code can probably be removed. */
18540 /* Any complete simple types at the top level (pretty much all
18541 of them, for a language without namespaces), can be processed
18543 if (parent_die
== NULL
18544 && pdi
.has_specification
== 0
18545 && pdi
.is_declaration
== 0
18546 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18547 || pdi
.tag
== DW_TAG_base_type
18548 || pdi
.tag
== DW_TAG_subrange_type
))
18550 if (building_psymtab
&& pdi
.name
!= NULL
)
18551 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), false,
18552 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18553 psymbol_placement::STATIC
,
18554 0, cu
->language
, objfile
);
18555 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18559 /* The exception for DW_TAG_typedef with has_children above is
18560 a workaround of GCC PR debug/47510. In the case of this complaint
18561 type_name_or_error will error on such types later.
18563 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18564 it could not find the child DIEs referenced later, this is checked
18565 above. In correct DWARF DW_TAG_typedef should have no children. */
18567 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18568 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18569 "- DIE at %s [in module %s]"),
18570 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18572 /* If we're at the second level, and we're an enumerator, and
18573 our parent has no specification (meaning possibly lives in a
18574 namespace elsewhere), then we can add the partial symbol now
18575 instead of queueing it. */
18576 if (pdi
.tag
== DW_TAG_enumerator
18577 && parent_die
!= NULL
18578 && parent_die
->die_parent
== NULL
18579 && parent_die
->tag
== DW_TAG_enumeration_type
18580 && parent_die
->has_specification
== 0)
18582 if (pdi
.name
== NULL
)
18583 complaint (_("malformed enumerator DIE ignored"));
18584 else if (building_psymtab
)
18585 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), false,
18586 VAR_DOMAIN
, LOC_CONST
, -1,
18587 cu
->language
== language_cplus
18588 ? psymbol_placement::GLOBAL
18589 : psymbol_placement::STATIC
,
18590 0, cu
->language
, objfile
);
18592 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18596 struct partial_die_info
*part_die
18597 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18599 /* We'll save this DIE so link it in. */
18600 part_die
->die_parent
= parent_die
;
18601 part_die
->die_sibling
= NULL
;
18602 part_die
->die_child
= NULL
;
18604 if (last_die
&& last_die
== parent_die
)
18605 last_die
->die_child
= part_die
;
18607 last_die
->die_sibling
= part_die
;
18609 last_die
= part_die
;
18611 if (first_die
== NULL
)
18612 first_die
= part_die
;
18614 /* Maybe add the DIE to the hash table. Not all DIEs that we
18615 find interesting need to be in the hash table, because we
18616 also have the parent/sibling/child chains; only those that we
18617 might refer to by offset later during partial symbol reading.
18619 For now this means things that might have be the target of a
18620 DW_AT_specification, DW_AT_abstract_origin, or
18621 DW_AT_extension. DW_AT_extension will refer only to
18622 namespaces; DW_AT_abstract_origin refers to functions (and
18623 many things under the function DIE, but we do not recurse
18624 into function DIEs during partial symbol reading) and
18625 possibly variables as well; DW_AT_specification refers to
18626 declarations. Declarations ought to have the DW_AT_declaration
18627 flag. It happens that GCC forgets to put it in sometimes, but
18628 only for functions, not for types.
18630 Adding more things than necessary to the hash table is harmless
18631 except for the performance cost. Adding too few will result in
18632 wasted time in find_partial_die, when we reread the compilation
18633 unit with load_all_dies set. */
18636 || abbrev
->tag
== DW_TAG_constant
18637 || abbrev
->tag
== DW_TAG_subprogram
18638 || abbrev
->tag
== DW_TAG_variable
18639 || abbrev
->tag
== DW_TAG_namespace
18640 || part_die
->is_declaration
)
18644 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18645 to_underlying (part_die
->sect_off
),
18650 /* For some DIEs we want to follow their children (if any). For C
18651 we have no reason to follow the children of structures; for other
18652 languages we have to, so that we can get at method physnames
18653 to infer fully qualified class names, for DW_AT_specification,
18654 and for C++ template arguments. For C++, we also look one level
18655 inside functions to find template arguments (if the name of the
18656 function does not already contain the template arguments).
18658 For Ada and Fortran, we need to scan the children of subprograms
18659 and lexical blocks as well because these languages allow the
18660 definition of nested entities that could be interesting for the
18661 debugger, such as nested subprograms for instance. */
18662 if (last_die
->has_children
18664 || last_die
->tag
== DW_TAG_namespace
18665 || last_die
->tag
== DW_TAG_module
18666 || last_die
->tag
== DW_TAG_enumeration_type
18667 || (cu
->language
== language_cplus
18668 && last_die
->tag
== DW_TAG_subprogram
18669 && (last_die
->name
== NULL
18670 || strchr (last_die
->name
, '<') == NULL
))
18671 || (cu
->language
!= language_c
18672 && (last_die
->tag
== DW_TAG_class_type
18673 || last_die
->tag
== DW_TAG_interface_type
18674 || last_die
->tag
== DW_TAG_structure_type
18675 || last_die
->tag
== DW_TAG_union_type
))
18676 || ((cu
->language
== language_ada
18677 || cu
->language
== language_fortran
)
18678 && (last_die
->tag
== DW_TAG_subprogram
18679 || last_die
->tag
== DW_TAG_lexical_block
))))
18682 parent_die
= last_die
;
18686 /* Otherwise we skip to the next sibling, if any. */
18687 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18689 /* Back to the top, do it again. */
18693 partial_die_info::partial_die_info (sect_offset sect_off_
,
18694 struct abbrev_info
*abbrev
)
18695 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18699 /* Read a minimal amount of information into the minimal die structure.
18700 INFO_PTR should point just after the initial uleb128 of a DIE. */
18703 partial_die_info::read (const struct die_reader_specs
*reader
,
18704 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18706 struct dwarf2_cu
*cu
= reader
->cu
;
18707 struct dwarf2_per_objfile
*dwarf2_per_objfile
18708 = cu
->per_cu
->dwarf2_per_objfile
;
18710 int has_low_pc_attr
= 0;
18711 int has_high_pc_attr
= 0;
18712 int high_pc_relative
= 0;
18714 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18716 struct attribute attr
;
18718 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18720 /* Store the data if it is of an attribute we want to keep in a
18721 partial symbol table. */
18727 case DW_TAG_compile_unit
:
18728 case DW_TAG_partial_unit
:
18729 case DW_TAG_type_unit
:
18730 /* Compilation units have a DW_AT_name that is a filename, not
18731 a source language identifier. */
18732 case DW_TAG_enumeration_type
:
18733 case DW_TAG_enumerator
:
18734 /* These tags always have simple identifiers already; no need
18735 to canonicalize them. */
18736 name
= DW_STRING (&attr
);
18740 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18743 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18744 &objfile
->per_bfd
->storage_obstack
);
18749 case DW_AT_linkage_name
:
18750 case DW_AT_MIPS_linkage_name
:
18751 /* Note that both forms of linkage name might appear. We
18752 assume they will be the same, and we only store the last
18754 linkage_name
= DW_STRING (&attr
);
18757 has_low_pc_attr
= 1;
18758 lowpc
= attr_value_as_address (&attr
);
18760 case DW_AT_high_pc
:
18761 has_high_pc_attr
= 1;
18762 highpc
= attr_value_as_address (&attr
);
18763 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18764 high_pc_relative
= 1;
18766 case DW_AT_location
:
18767 /* Support the .debug_loc offsets. */
18768 if (attr_form_is_block (&attr
))
18770 d
.locdesc
= DW_BLOCK (&attr
);
18772 else if (attr_form_is_section_offset (&attr
))
18774 dwarf2_complex_location_expr_complaint ();
18778 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18779 "partial symbol information");
18782 case DW_AT_external
:
18783 is_external
= DW_UNSND (&attr
);
18785 case DW_AT_declaration
:
18786 is_declaration
= DW_UNSND (&attr
);
18791 case DW_AT_abstract_origin
:
18792 case DW_AT_specification
:
18793 case DW_AT_extension
:
18794 has_specification
= 1;
18795 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18796 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18797 || cu
->per_cu
->is_dwz
);
18799 case DW_AT_sibling
:
18800 /* Ignore absolute siblings, they might point outside of
18801 the current compile unit. */
18802 if (attr
.form
== DW_FORM_ref_addr
)
18803 complaint (_("ignoring absolute DW_AT_sibling"));
18806 const gdb_byte
*buffer
= reader
->buffer
;
18807 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18808 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18810 if (sibling_ptr
< info_ptr
)
18811 complaint (_("DW_AT_sibling points backwards"));
18812 else if (sibling_ptr
> reader
->buffer_end
)
18813 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18815 sibling
= sibling_ptr
;
18818 case DW_AT_byte_size
:
18821 case DW_AT_const_value
:
18822 has_const_value
= 1;
18824 case DW_AT_calling_convention
:
18825 /* DWARF doesn't provide a way to identify a program's source-level
18826 entry point. DW_AT_calling_convention attributes are only meant
18827 to describe functions' calling conventions.
18829 However, because it's a necessary piece of information in
18830 Fortran, and before DWARF 4 DW_CC_program was the only
18831 piece of debugging information whose definition refers to
18832 a 'main program' at all, several compilers marked Fortran
18833 main programs with DW_CC_program --- even when those
18834 functions use the standard calling conventions.
18836 Although DWARF now specifies a way to provide this
18837 information, we support this practice for backward
18839 if (DW_UNSND (&attr
) == DW_CC_program
18840 && cu
->language
== language_fortran
)
18841 main_subprogram
= 1;
18844 if (DW_UNSND (&attr
) == DW_INL_inlined
18845 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18846 may_be_inlined
= 1;
18850 if (tag
== DW_TAG_imported_unit
)
18852 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18853 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18854 || cu
->per_cu
->is_dwz
);
18858 case DW_AT_main_subprogram
:
18859 main_subprogram
= DW_UNSND (&attr
);
18864 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18865 but that requires a full DIE, so instead we just
18867 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18868 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18869 + (need_ranges_base
18873 /* Value of the DW_AT_ranges attribute is the offset in the
18874 .debug_ranges section. */
18875 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18886 /* For Ada, if both the name and the linkage name appear, we prefer
18887 the latter. This lets "catch exception" work better, regardless
18888 of the order in which the name and linkage name were emitted.
18889 Really, though, this is just a workaround for the fact that gdb
18890 doesn't store both the name and the linkage name. */
18891 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18892 name
= linkage_name
;
18894 if (high_pc_relative
)
18897 if (has_low_pc_attr
&& has_high_pc_attr
)
18899 /* When using the GNU linker, .gnu.linkonce. sections are used to
18900 eliminate duplicate copies of functions and vtables and such.
18901 The linker will arbitrarily choose one and discard the others.
18902 The AT_*_pc values for such functions refer to local labels in
18903 these sections. If the section from that file was discarded, the
18904 labels are not in the output, so the relocs get a value of 0.
18905 If this is a discarded function, mark the pc bounds as invalid,
18906 so that GDB will ignore it. */
18907 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18909 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18910 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18912 complaint (_("DW_AT_low_pc %s is zero "
18913 "for DIE at %s [in module %s]"),
18914 paddress (gdbarch
, lowpc
),
18915 sect_offset_str (sect_off
),
18916 objfile_name (objfile
));
18918 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18919 else if (lowpc
>= highpc
)
18921 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18922 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18924 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18925 "for DIE at %s [in module %s]"),
18926 paddress (gdbarch
, lowpc
),
18927 paddress (gdbarch
, highpc
),
18928 sect_offset_str (sect_off
),
18929 objfile_name (objfile
));
18938 /* Find a cached partial DIE at OFFSET in CU. */
18940 struct partial_die_info
*
18941 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18943 struct partial_die_info
*lookup_die
= NULL
;
18944 struct partial_die_info
part_die (sect_off
);
18946 lookup_die
= ((struct partial_die_info
*)
18947 htab_find_with_hash (partial_dies
, &part_die
,
18948 to_underlying (sect_off
)));
18953 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18954 except in the case of .debug_types DIEs which do not reference
18955 outside their CU (they do however referencing other types via
18956 DW_FORM_ref_sig8). */
18958 static const struct cu_partial_die_info
18959 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18961 struct dwarf2_per_objfile
*dwarf2_per_objfile
18962 = cu
->per_cu
->dwarf2_per_objfile
;
18963 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18964 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18965 struct partial_die_info
*pd
= NULL
;
18967 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18968 && offset_in_cu_p (&cu
->header
, sect_off
))
18970 pd
= cu
->find_partial_die (sect_off
);
18973 /* We missed recording what we needed.
18974 Load all dies and try again. */
18975 per_cu
= cu
->per_cu
;
18979 /* TUs don't reference other CUs/TUs (except via type signatures). */
18980 if (cu
->per_cu
->is_debug_types
)
18982 error (_("Dwarf Error: Type Unit at offset %s contains"
18983 " external reference to offset %s [in module %s].\n"),
18984 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18985 bfd_get_filename (objfile
->obfd
));
18987 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18988 dwarf2_per_objfile
);
18990 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18991 load_partial_comp_unit (per_cu
);
18993 per_cu
->cu
->last_used
= 0;
18994 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18997 /* If we didn't find it, and not all dies have been loaded,
18998 load them all and try again. */
19000 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
19002 per_cu
->load_all_dies
= 1;
19004 /* This is nasty. When we reread the DIEs, somewhere up the call chain
19005 THIS_CU->cu may already be in use. So we can't just free it and
19006 replace its DIEs with the ones we read in. Instead, we leave those
19007 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
19008 and clobber THIS_CU->cu->partial_dies with the hash table for the new
19010 load_partial_comp_unit (per_cu
);
19012 pd
= per_cu
->cu
->find_partial_die (sect_off
);
19016 internal_error (__FILE__
, __LINE__
,
19017 _("could not find partial DIE %s "
19018 "in cache [from module %s]\n"),
19019 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
19020 return { per_cu
->cu
, pd
};
19023 /* See if we can figure out if the class lives in a namespace. We do
19024 this by looking for a member function; its demangled name will
19025 contain namespace info, if there is any. */
19028 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
19029 struct dwarf2_cu
*cu
)
19031 /* NOTE: carlton/2003-10-07: Getting the info this way changes
19032 what template types look like, because the demangler
19033 frequently doesn't give the same name as the debug info. We
19034 could fix this by only using the demangled name to get the
19035 prefix (but see comment in read_structure_type). */
19037 struct partial_die_info
*real_pdi
;
19038 struct partial_die_info
*child_pdi
;
19040 /* If this DIE (this DIE's specification, if any) has a parent, then
19041 we should not do this. We'll prepend the parent's fully qualified
19042 name when we create the partial symbol. */
19044 real_pdi
= struct_pdi
;
19045 while (real_pdi
->has_specification
)
19047 auto res
= find_partial_die (real_pdi
->spec_offset
,
19048 real_pdi
->spec_is_dwz
, cu
);
19049 real_pdi
= res
.pdi
;
19053 if (real_pdi
->die_parent
!= NULL
)
19056 for (child_pdi
= struct_pdi
->die_child
;
19058 child_pdi
= child_pdi
->die_sibling
)
19060 if (child_pdi
->tag
== DW_TAG_subprogram
19061 && child_pdi
->linkage_name
!= NULL
)
19063 char *actual_class_name
19064 = language_class_name_from_physname (cu
->language_defn
,
19065 child_pdi
->linkage_name
);
19066 if (actual_class_name
!= NULL
)
19068 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19070 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
19071 actual_class_name
);
19072 xfree (actual_class_name
);
19080 partial_die_info::fixup (struct dwarf2_cu
*cu
)
19082 /* Once we've fixed up a die, there's no point in doing so again.
19083 This also avoids a memory leak if we were to call
19084 guess_partial_die_structure_name multiple times. */
19088 /* If we found a reference attribute and the DIE has no name, try
19089 to find a name in the referred to DIE. */
19091 if (name
== NULL
&& has_specification
)
19093 struct partial_die_info
*spec_die
;
19095 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
19096 spec_die
= res
.pdi
;
19099 spec_die
->fixup (cu
);
19101 if (spec_die
->name
)
19103 name
= spec_die
->name
;
19105 /* Copy DW_AT_external attribute if it is set. */
19106 if (spec_die
->is_external
)
19107 is_external
= spec_die
->is_external
;
19111 /* Set default names for some unnamed DIEs. */
19113 if (name
== NULL
&& tag
== DW_TAG_namespace
)
19114 name
= CP_ANONYMOUS_NAMESPACE_STR
;
19116 /* If there is no parent die to provide a namespace, and there are
19117 children, see if we can determine the namespace from their linkage
19119 if (cu
->language
== language_cplus
19120 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
19121 && die_parent
== NULL
19123 && (tag
== DW_TAG_class_type
19124 || tag
== DW_TAG_structure_type
19125 || tag
== DW_TAG_union_type
))
19126 guess_partial_die_structure_name (this, cu
);
19128 /* GCC might emit a nameless struct or union that has a linkage
19129 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19131 && (tag
== DW_TAG_class_type
19132 || tag
== DW_TAG_interface_type
19133 || tag
== DW_TAG_structure_type
19134 || tag
== DW_TAG_union_type
)
19135 && linkage_name
!= NULL
)
19139 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
19144 /* Strip any leading namespaces/classes, keep only the base name.
19145 DW_AT_name for named DIEs does not contain the prefixes. */
19146 base
= strrchr (demangled
, ':');
19147 if (base
&& base
> demangled
&& base
[-1] == ':')
19152 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19153 name
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
, base
);
19161 /* Read an attribute value described by an attribute form. */
19163 static const gdb_byte
*
19164 read_attribute_value (const struct die_reader_specs
*reader
,
19165 struct attribute
*attr
, unsigned form
,
19166 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
19168 struct dwarf2_cu
*cu
= reader
->cu
;
19169 struct dwarf2_per_objfile
*dwarf2_per_objfile
19170 = cu
->per_cu
->dwarf2_per_objfile
;
19171 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19172 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19173 bfd
*abfd
= reader
->abfd
;
19174 struct comp_unit_head
*cu_header
= &cu
->header
;
19175 unsigned int bytes_read
;
19176 struct dwarf_block
*blk
;
19178 attr
->form
= (enum dwarf_form
) form
;
19181 case DW_FORM_ref_addr
:
19182 if (cu
->header
.version
== 2)
19183 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
19185 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
19186 &cu
->header
, &bytes_read
);
19187 info_ptr
+= bytes_read
;
19189 case DW_FORM_GNU_ref_alt
:
19190 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19191 info_ptr
+= bytes_read
;
19194 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
19195 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
19196 info_ptr
+= bytes_read
;
19198 case DW_FORM_block2
:
19199 blk
= dwarf_alloc_block (cu
);
19200 blk
->size
= read_2_bytes (abfd
, info_ptr
);
19202 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19203 info_ptr
+= blk
->size
;
19204 DW_BLOCK (attr
) = blk
;
19206 case DW_FORM_block4
:
19207 blk
= dwarf_alloc_block (cu
);
19208 blk
->size
= read_4_bytes (abfd
, info_ptr
);
19210 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19211 info_ptr
+= blk
->size
;
19212 DW_BLOCK (attr
) = blk
;
19214 case DW_FORM_data2
:
19215 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
19218 case DW_FORM_data4
:
19219 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
19222 case DW_FORM_data8
:
19223 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
19226 case DW_FORM_data16
:
19227 blk
= dwarf_alloc_block (cu
);
19229 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19231 DW_BLOCK (attr
) = blk
;
19233 case DW_FORM_sec_offset
:
19234 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19235 info_ptr
+= bytes_read
;
19237 case DW_FORM_string
:
19238 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19239 DW_STRING_IS_CANONICAL (attr
) = 0;
19240 info_ptr
+= bytes_read
;
19243 if (!cu
->per_cu
->is_dwz
)
19245 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19246 abfd
, info_ptr
, cu_header
,
19248 DW_STRING_IS_CANONICAL (attr
) = 0;
19249 info_ptr
+= bytes_read
;
19253 case DW_FORM_line_strp
:
19254 if (!cu
->per_cu
->is_dwz
)
19256 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
19258 cu_header
, &bytes_read
);
19259 DW_STRING_IS_CANONICAL (attr
) = 0;
19260 info_ptr
+= bytes_read
;
19264 case DW_FORM_GNU_strp_alt
:
19266 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19267 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
19270 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
19272 DW_STRING_IS_CANONICAL (attr
) = 0;
19273 info_ptr
+= bytes_read
;
19276 case DW_FORM_exprloc
:
19277 case DW_FORM_block
:
19278 blk
= dwarf_alloc_block (cu
);
19279 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19280 info_ptr
+= bytes_read
;
19281 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19282 info_ptr
+= blk
->size
;
19283 DW_BLOCK (attr
) = blk
;
19285 case DW_FORM_block1
:
19286 blk
= dwarf_alloc_block (cu
);
19287 blk
->size
= read_1_byte (abfd
, info_ptr
);
19289 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19290 info_ptr
+= blk
->size
;
19291 DW_BLOCK (attr
) = blk
;
19293 case DW_FORM_data1
:
19294 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19298 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19301 case DW_FORM_flag_present
:
19302 DW_UNSND (attr
) = 1;
19304 case DW_FORM_sdata
:
19305 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19306 info_ptr
+= bytes_read
;
19308 case DW_FORM_udata
:
19309 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19310 info_ptr
+= bytes_read
;
19313 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19314 + read_1_byte (abfd
, info_ptr
));
19318 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19319 + read_2_bytes (abfd
, info_ptr
));
19323 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19324 + read_4_bytes (abfd
, info_ptr
));
19328 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19329 + read_8_bytes (abfd
, info_ptr
));
19332 case DW_FORM_ref_sig8
:
19333 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19336 case DW_FORM_ref_udata
:
19337 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19338 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19339 info_ptr
+= bytes_read
;
19341 case DW_FORM_indirect
:
19342 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19343 info_ptr
+= bytes_read
;
19344 if (form
== DW_FORM_implicit_const
)
19346 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19347 info_ptr
+= bytes_read
;
19349 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19352 case DW_FORM_implicit_const
:
19353 DW_SND (attr
) = implicit_const
;
19355 case DW_FORM_addrx
:
19356 case DW_FORM_GNU_addr_index
:
19357 if (reader
->dwo_file
== NULL
)
19359 /* For now flag a hard error.
19360 Later we can turn this into a complaint. */
19361 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19362 dwarf_form_name (form
),
19363 bfd_get_filename (abfd
));
19365 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19366 info_ptr
+= bytes_read
;
19369 case DW_FORM_strx1
:
19370 case DW_FORM_strx2
:
19371 case DW_FORM_strx3
:
19372 case DW_FORM_strx4
:
19373 case DW_FORM_GNU_str_index
:
19374 if (reader
->dwo_file
== NULL
)
19376 /* For now flag a hard error.
19377 Later we can turn this into a complaint if warranted. */
19378 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19379 dwarf_form_name (form
),
19380 bfd_get_filename (abfd
));
19383 ULONGEST str_index
;
19384 if (form
== DW_FORM_strx1
)
19386 str_index
= read_1_byte (abfd
, info_ptr
);
19389 else if (form
== DW_FORM_strx2
)
19391 str_index
= read_2_bytes (abfd
, info_ptr
);
19394 else if (form
== DW_FORM_strx3
)
19396 str_index
= read_3_bytes (abfd
, info_ptr
);
19399 else if (form
== DW_FORM_strx4
)
19401 str_index
= read_4_bytes (abfd
, info_ptr
);
19406 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19407 info_ptr
+= bytes_read
;
19409 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19410 DW_STRING_IS_CANONICAL (attr
) = 0;
19414 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19415 dwarf_form_name (form
),
19416 bfd_get_filename (abfd
));
19420 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19421 attr
->form
= DW_FORM_GNU_ref_alt
;
19423 /* We have seen instances where the compiler tried to emit a byte
19424 size attribute of -1 which ended up being encoded as an unsigned
19425 0xffffffff. Although 0xffffffff is technically a valid size value,
19426 an object of this size seems pretty unlikely so we can relatively
19427 safely treat these cases as if the size attribute was invalid and
19428 treat them as zero by default. */
19429 if (attr
->name
== DW_AT_byte_size
19430 && form
== DW_FORM_data4
19431 && DW_UNSND (attr
) >= 0xffffffff)
19434 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19435 hex_string (DW_UNSND (attr
)));
19436 DW_UNSND (attr
) = 0;
19442 /* Read an attribute described by an abbreviated attribute. */
19444 static const gdb_byte
*
19445 read_attribute (const struct die_reader_specs
*reader
,
19446 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19447 const gdb_byte
*info_ptr
)
19449 attr
->name
= abbrev
->name
;
19450 return read_attribute_value (reader
, attr
, abbrev
->form
,
19451 abbrev
->implicit_const
, info_ptr
);
19454 /* Read dwarf information from a buffer. */
19456 static unsigned int
19457 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19459 return bfd_get_8 (abfd
, buf
);
19463 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19465 return bfd_get_signed_8 (abfd
, buf
);
19468 static unsigned int
19469 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19471 return bfd_get_16 (abfd
, buf
);
19475 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19477 return bfd_get_signed_16 (abfd
, buf
);
19480 static unsigned int
19481 read_3_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19483 unsigned int result
= 0;
19484 for (int i
= 0; i
< 3; ++i
)
19486 unsigned char byte
= bfd_get_8 (abfd
, buf
);
19488 result
|= ((unsigned int) byte
<< (i
* 8));
19493 static unsigned int
19494 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19496 return bfd_get_32 (abfd
, buf
);
19500 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19502 return bfd_get_signed_32 (abfd
, buf
);
19506 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19508 return bfd_get_64 (abfd
, buf
);
19512 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19513 unsigned int *bytes_read
)
19515 struct comp_unit_head
*cu_header
= &cu
->header
;
19516 CORE_ADDR retval
= 0;
19518 if (cu_header
->signed_addr_p
)
19520 switch (cu_header
->addr_size
)
19523 retval
= bfd_get_signed_16 (abfd
, buf
);
19526 retval
= bfd_get_signed_32 (abfd
, buf
);
19529 retval
= bfd_get_signed_64 (abfd
, buf
);
19532 internal_error (__FILE__
, __LINE__
,
19533 _("read_address: bad switch, signed [in module %s]"),
19534 bfd_get_filename (abfd
));
19539 switch (cu_header
->addr_size
)
19542 retval
= bfd_get_16 (abfd
, buf
);
19545 retval
= bfd_get_32 (abfd
, buf
);
19548 retval
= bfd_get_64 (abfd
, buf
);
19551 internal_error (__FILE__
, __LINE__
,
19552 _("read_address: bad switch, "
19553 "unsigned [in module %s]"),
19554 bfd_get_filename (abfd
));
19558 *bytes_read
= cu_header
->addr_size
;
19562 /* Read the initial length from a section. The (draft) DWARF 3
19563 specification allows the initial length to take up either 4 bytes
19564 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19565 bytes describe the length and all offsets will be 8 bytes in length
19568 An older, non-standard 64-bit format is also handled by this
19569 function. The older format in question stores the initial length
19570 as an 8-byte quantity without an escape value. Lengths greater
19571 than 2^32 aren't very common which means that the initial 4 bytes
19572 is almost always zero. Since a length value of zero doesn't make
19573 sense for the 32-bit format, this initial zero can be considered to
19574 be an escape value which indicates the presence of the older 64-bit
19575 format. As written, the code can't detect (old format) lengths
19576 greater than 4GB. If it becomes necessary to handle lengths
19577 somewhat larger than 4GB, we could allow other small values (such
19578 as the non-sensical values of 1, 2, and 3) to also be used as
19579 escape values indicating the presence of the old format.
19581 The value returned via bytes_read should be used to increment the
19582 relevant pointer after calling read_initial_length().
19584 [ Note: read_initial_length() and read_offset() are based on the
19585 document entitled "DWARF Debugging Information Format", revision
19586 3, draft 8, dated November 19, 2001. This document was obtained
19589 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19591 This document is only a draft and is subject to change. (So beware.)
19593 Details regarding the older, non-standard 64-bit format were
19594 determined empirically by examining 64-bit ELF files produced by
19595 the SGI toolchain on an IRIX 6.5 machine.
19597 - Kevin, July 16, 2002
19601 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19603 LONGEST length
= bfd_get_32 (abfd
, buf
);
19605 if (length
== 0xffffffff)
19607 length
= bfd_get_64 (abfd
, buf
+ 4);
19610 else if (length
== 0)
19612 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19613 length
= bfd_get_64 (abfd
, buf
);
19624 /* Cover function for read_initial_length.
19625 Returns the length of the object at BUF, and stores the size of the
19626 initial length in *BYTES_READ and stores the size that offsets will be in
19628 If the initial length size is not equivalent to that specified in
19629 CU_HEADER then issue a complaint.
19630 This is useful when reading non-comp-unit headers. */
19633 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19634 const struct comp_unit_head
*cu_header
,
19635 unsigned int *bytes_read
,
19636 unsigned int *offset_size
)
19638 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19640 gdb_assert (cu_header
->initial_length_size
== 4
19641 || cu_header
->initial_length_size
== 8
19642 || cu_header
->initial_length_size
== 12);
19644 if (cu_header
->initial_length_size
!= *bytes_read
)
19645 complaint (_("intermixed 32-bit and 64-bit DWARF sections"));
19647 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19651 /* Read an offset from the data stream. The size of the offset is
19652 given by cu_header->offset_size. */
19655 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19656 const struct comp_unit_head
*cu_header
,
19657 unsigned int *bytes_read
)
19659 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19661 *bytes_read
= cu_header
->offset_size
;
19665 /* Read an offset from the data stream. */
19668 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19670 LONGEST retval
= 0;
19672 switch (offset_size
)
19675 retval
= bfd_get_32 (abfd
, buf
);
19678 retval
= bfd_get_64 (abfd
, buf
);
19681 internal_error (__FILE__
, __LINE__
,
19682 _("read_offset_1: bad switch [in module %s]"),
19683 bfd_get_filename (abfd
));
19689 static const gdb_byte
*
19690 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19692 /* If the size of a host char is 8 bits, we can return a pointer
19693 to the buffer, otherwise we have to copy the data to a buffer
19694 allocated on the temporary obstack. */
19695 gdb_assert (HOST_CHAR_BIT
== 8);
19699 static const char *
19700 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19701 unsigned int *bytes_read_ptr
)
19703 /* If the size of a host char is 8 bits, we can return a pointer
19704 to the string, otherwise we have to copy the string to a buffer
19705 allocated on the temporary obstack. */
19706 gdb_assert (HOST_CHAR_BIT
== 8);
19709 *bytes_read_ptr
= 1;
19712 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19713 return (const char *) buf
;
19716 /* Return pointer to string at section SECT offset STR_OFFSET with error
19717 reporting strings FORM_NAME and SECT_NAME. */
19719 static const char *
19720 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19721 bfd
*abfd
, LONGEST str_offset
,
19722 struct dwarf2_section_info
*sect
,
19723 const char *form_name
,
19724 const char *sect_name
)
19726 dwarf2_read_section (objfile
, sect
);
19727 if (sect
->buffer
== NULL
)
19728 error (_("%s used without %s section [in module %s]"),
19729 form_name
, sect_name
, bfd_get_filename (abfd
));
19730 if (str_offset
>= sect
->size
)
19731 error (_("%s pointing outside of %s section [in module %s]"),
19732 form_name
, sect_name
, bfd_get_filename (abfd
));
19733 gdb_assert (HOST_CHAR_BIT
== 8);
19734 if (sect
->buffer
[str_offset
] == '\0')
19736 return (const char *) (sect
->buffer
+ str_offset
);
19739 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19741 static const char *
19742 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19743 bfd
*abfd
, LONGEST str_offset
)
19745 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19747 &dwarf2_per_objfile
->str
,
19748 "DW_FORM_strp", ".debug_str");
19751 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19753 static const char *
19754 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19755 bfd
*abfd
, LONGEST str_offset
)
19757 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19759 &dwarf2_per_objfile
->line_str
,
19760 "DW_FORM_line_strp",
19761 ".debug_line_str");
19764 /* Read a string at offset STR_OFFSET in the .debug_str section from
19765 the .dwz file DWZ. Throw an error if the offset is too large. If
19766 the string consists of a single NUL byte, return NULL; otherwise
19767 return a pointer to the string. */
19769 static const char *
19770 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19771 LONGEST str_offset
)
19773 dwarf2_read_section (objfile
, &dwz
->str
);
19775 if (dwz
->str
.buffer
== NULL
)
19776 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19777 "section [in module %s]"),
19778 bfd_get_filename (dwz
->dwz_bfd
.get ()));
19779 if (str_offset
>= dwz
->str
.size
)
19780 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19781 ".debug_str section [in module %s]"),
19782 bfd_get_filename (dwz
->dwz_bfd
.get ()));
19783 gdb_assert (HOST_CHAR_BIT
== 8);
19784 if (dwz
->str
.buffer
[str_offset
] == '\0')
19786 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19789 /* Return pointer to string at .debug_str offset as read from BUF.
19790 BUF is assumed to be in a compilation unit described by CU_HEADER.
19791 Return *BYTES_READ_PTR count of bytes read from BUF. */
19793 static const char *
19794 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19795 const gdb_byte
*buf
,
19796 const struct comp_unit_head
*cu_header
,
19797 unsigned int *bytes_read_ptr
)
19799 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19801 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19804 /* Return pointer to string at .debug_line_str offset as read from BUF.
19805 BUF is assumed to be in a compilation unit described by CU_HEADER.
19806 Return *BYTES_READ_PTR count of bytes read from BUF. */
19808 static const char *
19809 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19810 bfd
*abfd
, const gdb_byte
*buf
,
19811 const struct comp_unit_head
*cu_header
,
19812 unsigned int *bytes_read_ptr
)
19814 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19816 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19821 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19822 unsigned int *bytes_read_ptr
)
19825 unsigned int num_read
;
19827 unsigned char byte
;
19834 byte
= bfd_get_8 (abfd
, buf
);
19837 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19838 if ((byte
& 128) == 0)
19844 *bytes_read_ptr
= num_read
;
19849 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19850 unsigned int *bytes_read_ptr
)
19853 int shift
, num_read
;
19854 unsigned char byte
;
19861 byte
= bfd_get_8 (abfd
, buf
);
19864 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19866 if ((byte
& 128) == 0)
19871 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19872 result
|= -(((ULONGEST
) 1) << shift
);
19873 *bytes_read_ptr
= num_read
;
19877 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19878 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19879 ADDR_SIZE is the size of addresses from the CU header. */
19882 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19883 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19885 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19886 bfd
*abfd
= objfile
->obfd
;
19887 const gdb_byte
*info_ptr
;
19889 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19890 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19891 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19892 objfile_name (objfile
));
19893 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19894 error (_("DW_FORM_addr_index pointing outside of "
19895 ".debug_addr section [in module %s]"),
19896 objfile_name (objfile
));
19897 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19898 + addr_base
+ addr_index
* addr_size
);
19899 if (addr_size
== 4)
19900 return bfd_get_32 (abfd
, info_ptr
);
19902 return bfd_get_64 (abfd
, info_ptr
);
19905 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19908 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19910 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19911 cu
->addr_base
, cu
->header
.addr_size
);
19914 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19917 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19918 unsigned int *bytes_read
)
19920 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19921 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19923 return read_addr_index (cu
, addr_index
);
19926 /* Data structure to pass results from dwarf2_read_addr_index_reader
19927 back to dwarf2_read_addr_index. */
19929 struct dwarf2_read_addr_index_data
19931 ULONGEST addr_base
;
19935 /* die_reader_func for dwarf2_read_addr_index. */
19938 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19939 const gdb_byte
*info_ptr
,
19940 struct die_info
*comp_unit_die
,
19944 struct dwarf2_cu
*cu
= reader
->cu
;
19945 struct dwarf2_read_addr_index_data
*aidata
=
19946 (struct dwarf2_read_addr_index_data
*) data
;
19948 aidata
->addr_base
= cu
->addr_base
;
19949 aidata
->addr_size
= cu
->header
.addr_size
;
19952 /* Given an index in .debug_addr, fetch the value.
19953 NOTE: This can be called during dwarf expression evaluation,
19954 long after the debug information has been read, and thus per_cu->cu
19955 may no longer exist. */
19958 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19959 unsigned int addr_index
)
19961 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19962 struct dwarf2_cu
*cu
= per_cu
->cu
;
19963 ULONGEST addr_base
;
19966 /* We need addr_base and addr_size.
19967 If we don't have PER_CU->cu, we have to get it.
19968 Nasty, but the alternative is storing the needed info in PER_CU,
19969 which at this point doesn't seem justified: it's not clear how frequently
19970 it would get used and it would increase the size of every PER_CU.
19971 Entry points like dwarf2_per_cu_addr_size do a similar thing
19972 so we're not in uncharted territory here.
19973 Alas we need to be a bit more complicated as addr_base is contained
19976 We don't need to read the entire CU(/TU).
19977 We just need the header and top level die.
19979 IWBN to use the aging mechanism to let us lazily later discard the CU.
19980 For now we skip this optimization. */
19984 addr_base
= cu
->addr_base
;
19985 addr_size
= cu
->header
.addr_size
;
19989 struct dwarf2_read_addr_index_data aidata
;
19991 /* Note: We can't use init_cutu_and_read_dies_simple here,
19992 we need addr_base. */
19993 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0, false,
19994 dwarf2_read_addr_index_reader
, &aidata
);
19995 addr_base
= aidata
.addr_base
;
19996 addr_size
= aidata
.addr_size
;
19999 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
20003 /* Given a DW_FORM_GNU_str_index or DW_FORM_strx, fetch the string.
20004 This is only used by the Fission support. */
20006 static const char *
20007 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
20009 struct dwarf2_cu
*cu
= reader
->cu
;
20010 struct dwarf2_per_objfile
*dwarf2_per_objfile
20011 = cu
->per_cu
->dwarf2_per_objfile
;
20012 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20013 const char *objf_name
= objfile_name (objfile
);
20014 bfd
*abfd
= objfile
->obfd
;
20015 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
20016 struct dwarf2_section_info
*str_offsets_section
=
20017 &reader
->dwo_file
->sections
.str_offsets
;
20018 const gdb_byte
*info_ptr
;
20019 ULONGEST str_offset
;
20020 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
20022 dwarf2_read_section (objfile
, str_section
);
20023 dwarf2_read_section (objfile
, str_offsets_section
);
20024 if (str_section
->buffer
== NULL
)
20025 error (_("%s used without .debug_str.dwo section"
20026 " in CU at offset %s [in module %s]"),
20027 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20028 if (str_offsets_section
->buffer
== NULL
)
20029 error (_("%s used without .debug_str_offsets.dwo section"
20030 " in CU at offset %s [in module %s]"),
20031 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20032 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
20033 error (_("%s pointing outside of .debug_str_offsets.dwo"
20034 " section in CU at offset %s [in module %s]"),
20035 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20036 info_ptr
= (str_offsets_section
->buffer
20037 + str_index
* cu
->header
.offset_size
);
20038 if (cu
->header
.offset_size
== 4)
20039 str_offset
= bfd_get_32 (abfd
, info_ptr
);
20041 str_offset
= bfd_get_64 (abfd
, info_ptr
);
20042 if (str_offset
>= str_section
->size
)
20043 error (_("Offset from %s pointing outside of"
20044 " .debug_str.dwo section in CU at offset %s [in module %s]"),
20045 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20046 return (const char *) (str_section
->buffer
+ str_offset
);
20049 /* Return the length of an LEB128 number in BUF. */
20052 leb128_size (const gdb_byte
*buf
)
20054 const gdb_byte
*begin
= buf
;
20060 if ((byte
& 128) == 0)
20061 return buf
- begin
;
20066 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
20075 cu
->language
= language_c
;
20078 case DW_LANG_C_plus_plus
:
20079 case DW_LANG_C_plus_plus_11
:
20080 case DW_LANG_C_plus_plus_14
:
20081 cu
->language
= language_cplus
;
20084 cu
->language
= language_d
;
20086 case DW_LANG_Fortran77
:
20087 case DW_LANG_Fortran90
:
20088 case DW_LANG_Fortran95
:
20089 case DW_LANG_Fortran03
:
20090 case DW_LANG_Fortran08
:
20091 cu
->language
= language_fortran
;
20094 cu
->language
= language_go
;
20096 case DW_LANG_Mips_Assembler
:
20097 cu
->language
= language_asm
;
20099 case DW_LANG_Ada83
:
20100 case DW_LANG_Ada95
:
20101 cu
->language
= language_ada
;
20103 case DW_LANG_Modula2
:
20104 cu
->language
= language_m2
;
20106 case DW_LANG_Pascal83
:
20107 cu
->language
= language_pascal
;
20110 cu
->language
= language_objc
;
20113 case DW_LANG_Rust_old
:
20114 cu
->language
= language_rust
;
20116 case DW_LANG_Cobol74
:
20117 case DW_LANG_Cobol85
:
20119 cu
->language
= language_minimal
;
20122 cu
->language_defn
= language_def (cu
->language
);
20125 /* Return the named attribute or NULL if not there. */
20127 static struct attribute
*
20128 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20133 struct attribute
*spec
= NULL
;
20135 for (i
= 0; i
< die
->num_attrs
; ++i
)
20137 if (die
->attrs
[i
].name
== name
)
20138 return &die
->attrs
[i
];
20139 if (die
->attrs
[i
].name
== DW_AT_specification
20140 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
20141 spec
= &die
->attrs
[i
];
20147 die
= follow_die_ref (die
, spec
, &cu
);
20153 /* Return the named attribute or NULL if not there,
20154 but do not follow DW_AT_specification, etc.
20155 This is for use in contexts where we're reading .debug_types dies.
20156 Following DW_AT_specification, DW_AT_abstract_origin will take us
20157 back up the chain, and we want to go down. */
20159 static struct attribute
*
20160 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
20164 for (i
= 0; i
< die
->num_attrs
; ++i
)
20165 if (die
->attrs
[i
].name
== name
)
20166 return &die
->attrs
[i
];
20171 /* Return the string associated with a string-typed attribute, or NULL if it
20172 is either not found or is of an incorrect type. */
20174 static const char *
20175 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20177 struct attribute
*attr
;
20178 const char *str
= NULL
;
20180 attr
= dwarf2_attr (die
, name
, cu
);
20184 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
20185 || attr
->form
== DW_FORM_string
20186 || attr
->form
== DW_FORM_strx
20187 || attr
->form
== DW_FORM_strx1
20188 || attr
->form
== DW_FORM_strx2
20189 || attr
->form
== DW_FORM_strx3
20190 || attr
->form
== DW_FORM_strx4
20191 || attr
->form
== DW_FORM_GNU_str_index
20192 || attr
->form
== DW_FORM_GNU_strp_alt
)
20193 str
= DW_STRING (attr
);
20195 complaint (_("string type expected for attribute %s for "
20196 "DIE at %s in module %s"),
20197 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
20198 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
20204 /* Return the dwo name or NULL if not present. If present, it is in either
20205 DW_AT_GNU_dwo_name or DW_AT_dwo_name atrribute. */
20206 static const char *
20207 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
20209 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
20210 if (dwo_name
== nullptr)
20211 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
20215 /* Return non-zero iff the attribute NAME is defined for the given DIE,
20216 and holds a non-zero value. This function should only be used for
20217 DW_FORM_flag or DW_FORM_flag_present attributes. */
20220 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
20222 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
20224 return (attr
&& DW_UNSND (attr
));
20228 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
20230 /* A DIE is a declaration if it has a DW_AT_declaration attribute
20231 which value is non-zero. However, we have to be careful with
20232 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
20233 (via dwarf2_flag_true_p) follows this attribute. So we may
20234 end up accidently finding a declaration attribute that belongs
20235 to a different DIE referenced by the specification attribute,
20236 even though the given DIE does not have a declaration attribute. */
20237 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
20238 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
20241 /* Return the die giving the specification for DIE, if there is
20242 one. *SPEC_CU is the CU containing DIE on input, and the CU
20243 containing the return value on output. If there is no
20244 specification, but there is an abstract origin, that is
20247 static struct die_info
*
20248 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
20250 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
20253 if (spec_attr
== NULL
)
20254 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
20256 if (spec_attr
== NULL
)
20259 return follow_die_ref (die
, spec_attr
, spec_cu
);
20262 /* Stub for free_line_header to match void * callback types. */
20265 free_line_header_voidp (void *arg
)
20267 struct line_header
*lh
= (struct line_header
*) arg
;
20273 line_header::add_include_dir (const char *include_dir
)
20275 if (dwarf_line_debug
>= 2)
20276 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
20277 include_dirs
.size () + 1, include_dir
);
20279 include_dirs
.push_back (include_dir
);
20283 line_header::add_file_name (const char *name
,
20285 unsigned int mod_time
,
20286 unsigned int length
)
20288 if (dwarf_line_debug
>= 2)
20289 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
20290 (unsigned) file_names
.size () + 1, name
);
20292 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
20295 /* A convenience function to find the proper .debug_line section for a CU. */
20297 static struct dwarf2_section_info
*
20298 get_debug_line_section (struct dwarf2_cu
*cu
)
20300 struct dwarf2_section_info
*section
;
20301 struct dwarf2_per_objfile
*dwarf2_per_objfile
20302 = cu
->per_cu
->dwarf2_per_objfile
;
20304 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
20306 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20307 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
20308 else if (cu
->per_cu
->is_dwz
)
20310 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
20312 section
= &dwz
->line
;
20315 section
= &dwarf2_per_objfile
->line
;
20320 /* Read directory or file name entry format, starting with byte of
20321 format count entries, ULEB128 pairs of entry formats, ULEB128 of
20322 entries count and the entries themselves in the described entry
20326 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
20327 bfd
*abfd
, const gdb_byte
**bufp
,
20328 struct line_header
*lh
,
20329 const struct comp_unit_head
*cu_header
,
20330 void (*callback
) (struct line_header
*lh
,
20333 unsigned int mod_time
,
20334 unsigned int length
))
20336 gdb_byte format_count
, formati
;
20337 ULONGEST data_count
, datai
;
20338 const gdb_byte
*buf
= *bufp
;
20339 const gdb_byte
*format_header_data
;
20340 unsigned int bytes_read
;
20342 format_count
= read_1_byte (abfd
, buf
);
20344 format_header_data
= buf
;
20345 for (formati
= 0; formati
< format_count
; formati
++)
20347 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20349 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20353 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20355 for (datai
= 0; datai
< data_count
; datai
++)
20357 const gdb_byte
*format
= format_header_data
;
20358 struct file_entry fe
;
20360 for (formati
= 0; formati
< format_count
; formati
++)
20362 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20363 format
+= bytes_read
;
20365 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20366 format
+= bytes_read
;
20368 gdb::optional
<const char *> string
;
20369 gdb::optional
<unsigned int> uint
;
20373 case DW_FORM_string
:
20374 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
20378 case DW_FORM_line_strp
:
20379 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
20386 case DW_FORM_data1
:
20387 uint
.emplace (read_1_byte (abfd
, buf
));
20391 case DW_FORM_data2
:
20392 uint
.emplace (read_2_bytes (abfd
, buf
));
20396 case DW_FORM_data4
:
20397 uint
.emplace (read_4_bytes (abfd
, buf
));
20401 case DW_FORM_data8
:
20402 uint
.emplace (read_8_bytes (abfd
, buf
));
20406 case DW_FORM_udata
:
20407 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20411 case DW_FORM_block
:
20412 /* It is valid only for DW_LNCT_timestamp which is ignored by
20417 switch (content_type
)
20420 if (string
.has_value ())
20423 case DW_LNCT_directory_index
:
20424 if (uint
.has_value ())
20425 fe
.d_index
= (dir_index
) *uint
;
20427 case DW_LNCT_timestamp
:
20428 if (uint
.has_value ())
20429 fe
.mod_time
= *uint
;
20432 if (uint
.has_value ())
20438 complaint (_("Unknown format content type %s"),
20439 pulongest (content_type
));
20443 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20449 /* Read the statement program header starting at OFFSET in
20450 .debug_line, or .debug_line.dwo. Return a pointer
20451 to a struct line_header, allocated using xmalloc.
20452 Returns NULL if there is a problem reading the header, e.g., if it
20453 has a version we don't understand.
20455 NOTE: the strings in the include directory and file name tables of
20456 the returned object point into the dwarf line section buffer,
20457 and must not be freed. */
20459 static line_header_up
20460 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20462 const gdb_byte
*line_ptr
;
20463 unsigned int bytes_read
, offset_size
;
20465 const char *cur_dir
, *cur_file
;
20466 struct dwarf2_section_info
*section
;
20468 struct dwarf2_per_objfile
*dwarf2_per_objfile
20469 = cu
->per_cu
->dwarf2_per_objfile
;
20471 section
= get_debug_line_section (cu
);
20472 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20473 if (section
->buffer
== NULL
)
20475 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20476 complaint (_("missing .debug_line.dwo section"));
20478 complaint (_("missing .debug_line section"));
20482 /* We can't do this until we know the section is non-empty.
20483 Only then do we know we have such a section. */
20484 abfd
= get_section_bfd_owner (section
);
20486 /* Make sure that at least there's room for the total_length field.
20487 That could be 12 bytes long, but we're just going to fudge that. */
20488 if (to_underlying (sect_off
) + 4 >= section
->size
)
20490 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20494 line_header_up
lh (new line_header ());
20496 lh
->sect_off
= sect_off
;
20497 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20499 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20501 /* Read in the header. */
20503 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20504 &bytes_read
, &offset_size
);
20505 line_ptr
+= bytes_read
;
20506 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20508 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20511 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20512 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20514 if (lh
->version
> 5)
20516 /* This is a version we don't understand. The format could have
20517 changed in ways we don't handle properly so just punt. */
20518 complaint (_("unsupported version in .debug_line section"));
20521 if (lh
->version
>= 5)
20523 gdb_byte segment_selector_size
;
20525 /* Skip address size. */
20526 read_1_byte (abfd
, line_ptr
);
20529 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20531 if (segment_selector_size
!= 0)
20533 complaint (_("unsupported segment selector size %u "
20534 "in .debug_line section"),
20535 segment_selector_size
);
20539 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20540 line_ptr
+= offset_size
;
20541 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20543 if (lh
->version
>= 4)
20545 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20549 lh
->maximum_ops_per_instruction
= 1;
20551 if (lh
->maximum_ops_per_instruction
== 0)
20553 lh
->maximum_ops_per_instruction
= 1;
20554 complaint (_("invalid maximum_ops_per_instruction "
20555 "in `.debug_line' section"));
20558 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20560 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20562 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20564 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20566 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20568 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20569 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20571 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20575 if (lh
->version
>= 5)
20577 /* Read directory table. */
20578 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20580 [] (struct line_header
*header
, const char *name
,
20581 dir_index d_index
, unsigned int mod_time
,
20582 unsigned int length
)
20584 header
->add_include_dir (name
);
20587 /* Read file name table. */
20588 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20590 [] (struct line_header
*header
, const char *name
,
20591 dir_index d_index
, unsigned int mod_time
,
20592 unsigned int length
)
20594 header
->add_file_name (name
, d_index
, mod_time
, length
);
20599 /* Read directory table. */
20600 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20602 line_ptr
+= bytes_read
;
20603 lh
->add_include_dir (cur_dir
);
20605 line_ptr
+= bytes_read
;
20607 /* Read file name table. */
20608 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20610 unsigned int mod_time
, length
;
20613 line_ptr
+= bytes_read
;
20614 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20615 line_ptr
+= bytes_read
;
20616 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20617 line_ptr
+= bytes_read
;
20618 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20619 line_ptr
+= bytes_read
;
20621 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20623 line_ptr
+= bytes_read
;
20625 lh
->statement_program_start
= line_ptr
;
20627 if (line_ptr
> (section
->buffer
+ section
->size
))
20628 complaint (_("line number info header doesn't "
20629 "fit in `.debug_line' section"));
20634 /* Subroutine of dwarf_decode_lines to simplify it.
20635 Return the file name of the psymtab for included file FILE_INDEX
20636 in line header LH of PST.
20637 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20638 If space for the result is malloc'd, *NAME_HOLDER will be set.
20639 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20641 static const char *
20642 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20643 const struct partial_symtab
*pst
,
20644 const char *comp_dir
,
20645 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20647 const file_entry
&fe
= lh
->file_names
[file_index
];
20648 const char *include_name
= fe
.name
;
20649 const char *include_name_to_compare
= include_name
;
20650 const char *pst_filename
;
20653 const char *dir_name
= fe
.include_dir (lh
);
20655 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20656 if (!IS_ABSOLUTE_PATH (include_name
)
20657 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20659 /* Avoid creating a duplicate psymtab for PST.
20660 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20661 Before we do the comparison, however, we need to account
20662 for DIR_NAME and COMP_DIR.
20663 First prepend dir_name (if non-NULL). If we still don't
20664 have an absolute path prepend comp_dir (if non-NULL).
20665 However, the directory we record in the include-file's
20666 psymtab does not contain COMP_DIR (to match the
20667 corresponding symtab(s)).
20672 bash$ gcc -g ./hello.c
20673 include_name = "hello.c"
20675 DW_AT_comp_dir = comp_dir = "/tmp"
20676 DW_AT_name = "./hello.c"
20680 if (dir_name
!= NULL
)
20682 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20683 include_name
, (char *) NULL
));
20684 include_name
= name_holder
->get ();
20685 include_name_to_compare
= include_name
;
20687 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20689 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20690 include_name
, (char *) NULL
));
20691 include_name_to_compare
= hold_compare
.get ();
20695 pst_filename
= pst
->filename
;
20696 gdb::unique_xmalloc_ptr
<char> copied_name
;
20697 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20699 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20700 pst_filename
, (char *) NULL
));
20701 pst_filename
= copied_name
.get ();
20704 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20708 return include_name
;
20711 /* State machine to track the state of the line number program. */
20713 class lnp_state_machine
20716 /* Initialize a machine state for the start of a line number
20718 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
20719 bool record_lines_p
);
20721 file_entry
*current_file ()
20723 /* lh->file_names is 0-based, but the file name numbers in the
20724 statement program are 1-based. */
20725 return m_line_header
->file_name_at (m_file
);
20728 /* Record the line in the state machine. END_SEQUENCE is true if
20729 we're processing the end of a sequence. */
20730 void record_line (bool end_sequence
);
20732 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
20733 nop-out rest of the lines in this sequence. */
20734 void check_line_address (struct dwarf2_cu
*cu
,
20735 const gdb_byte
*line_ptr
,
20736 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
20738 void handle_set_discriminator (unsigned int discriminator
)
20740 m_discriminator
= discriminator
;
20741 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20744 /* Handle DW_LNE_set_address. */
20745 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20748 address
+= baseaddr
;
20749 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20752 /* Handle DW_LNS_advance_pc. */
20753 void handle_advance_pc (CORE_ADDR adjust
);
20755 /* Handle a special opcode. */
20756 void handle_special_opcode (unsigned char op_code
);
20758 /* Handle DW_LNS_advance_line. */
20759 void handle_advance_line (int line_delta
)
20761 advance_line (line_delta
);
20764 /* Handle DW_LNS_set_file. */
20765 void handle_set_file (file_name_index file
);
20767 /* Handle DW_LNS_negate_stmt. */
20768 void handle_negate_stmt ()
20770 m_is_stmt
= !m_is_stmt
;
20773 /* Handle DW_LNS_const_add_pc. */
20774 void handle_const_add_pc ();
20776 /* Handle DW_LNS_fixed_advance_pc. */
20777 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20779 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20783 /* Handle DW_LNS_copy. */
20784 void handle_copy ()
20786 record_line (false);
20787 m_discriminator
= 0;
20790 /* Handle DW_LNE_end_sequence. */
20791 void handle_end_sequence ()
20793 m_currently_recording_lines
= true;
20797 /* Advance the line by LINE_DELTA. */
20798 void advance_line (int line_delta
)
20800 m_line
+= line_delta
;
20802 if (line_delta
!= 0)
20803 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20806 struct dwarf2_cu
*m_cu
;
20808 gdbarch
*m_gdbarch
;
20810 /* True if we're recording lines.
20811 Otherwise we're building partial symtabs and are just interested in
20812 finding include files mentioned by the line number program. */
20813 bool m_record_lines_p
;
20815 /* The line number header. */
20816 line_header
*m_line_header
;
20818 /* These are part of the standard DWARF line number state machine,
20819 and initialized according to the DWARF spec. */
20821 unsigned char m_op_index
= 0;
20822 /* The line table index (1-based) of the current file. */
20823 file_name_index m_file
= (file_name_index
) 1;
20824 unsigned int m_line
= 1;
20826 /* These are initialized in the constructor. */
20828 CORE_ADDR m_address
;
20830 unsigned int m_discriminator
;
20832 /* Additional bits of state we need to track. */
20834 /* The last file that we called dwarf2_start_subfile for.
20835 This is only used for TLLs. */
20836 unsigned int m_last_file
= 0;
20837 /* The last file a line number was recorded for. */
20838 struct subfile
*m_last_subfile
= NULL
;
20840 /* When true, record the lines we decode. */
20841 bool m_currently_recording_lines
= false;
20843 /* The last line number that was recorded, used to coalesce
20844 consecutive entries for the same line. This can happen, for
20845 example, when discriminators are present. PR 17276. */
20846 unsigned int m_last_line
= 0;
20847 bool m_line_has_non_zero_discriminator
= false;
20851 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20853 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20854 / m_line_header
->maximum_ops_per_instruction
)
20855 * m_line_header
->minimum_instruction_length
);
20856 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20857 m_op_index
= ((m_op_index
+ adjust
)
20858 % m_line_header
->maximum_ops_per_instruction
);
20862 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20864 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20865 CORE_ADDR addr_adj
= (((m_op_index
20866 + (adj_opcode
/ m_line_header
->line_range
))
20867 / m_line_header
->maximum_ops_per_instruction
)
20868 * m_line_header
->minimum_instruction_length
);
20869 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20870 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20871 % m_line_header
->maximum_ops_per_instruction
);
20873 int line_delta
= (m_line_header
->line_base
20874 + (adj_opcode
% m_line_header
->line_range
));
20875 advance_line (line_delta
);
20876 record_line (false);
20877 m_discriminator
= 0;
20881 lnp_state_machine::handle_set_file (file_name_index file
)
20885 const file_entry
*fe
= current_file ();
20887 dwarf2_debug_line_missing_file_complaint ();
20888 else if (m_record_lines_p
)
20890 const char *dir
= fe
->include_dir (m_line_header
);
20892 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20893 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20894 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
20899 lnp_state_machine::handle_const_add_pc ()
20902 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20905 = (((m_op_index
+ adjust
)
20906 / m_line_header
->maximum_ops_per_instruction
)
20907 * m_line_header
->minimum_instruction_length
);
20909 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20910 m_op_index
= ((m_op_index
+ adjust
)
20911 % m_line_header
->maximum_ops_per_instruction
);
20914 /* Return non-zero if we should add LINE to the line number table.
20915 LINE is the line to add, LAST_LINE is the last line that was added,
20916 LAST_SUBFILE is the subfile for LAST_LINE.
20917 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20918 had a non-zero discriminator.
20920 We have to be careful in the presence of discriminators.
20921 E.g., for this line:
20923 for (i = 0; i < 100000; i++);
20925 clang can emit four line number entries for that one line,
20926 each with a different discriminator.
20927 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20929 However, we want gdb to coalesce all four entries into one.
20930 Otherwise the user could stepi into the middle of the line and
20931 gdb would get confused about whether the pc really was in the
20932 middle of the line.
20934 Things are further complicated by the fact that two consecutive
20935 line number entries for the same line is a heuristic used by gcc
20936 to denote the end of the prologue. So we can't just discard duplicate
20937 entries, we have to be selective about it. The heuristic we use is
20938 that we only collapse consecutive entries for the same line if at least
20939 one of those entries has a non-zero discriminator. PR 17276.
20941 Note: Addresses in the line number state machine can never go backwards
20942 within one sequence, thus this coalescing is ok. */
20945 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20946 unsigned int line
, unsigned int last_line
,
20947 int line_has_non_zero_discriminator
,
20948 struct subfile
*last_subfile
)
20950 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20952 if (line
!= last_line
)
20954 /* Same line for the same file that we've seen already.
20955 As a last check, for pr 17276, only record the line if the line
20956 has never had a non-zero discriminator. */
20957 if (!line_has_non_zero_discriminator
)
20962 /* Use the CU's builder to record line number LINE beginning at
20963 address ADDRESS in the line table of subfile SUBFILE. */
20966 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20967 unsigned int line
, CORE_ADDR address
,
20968 struct dwarf2_cu
*cu
)
20970 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20972 if (dwarf_line_debug
)
20974 fprintf_unfiltered (gdb_stdlog
,
20975 "Recording line %u, file %s, address %s\n",
20976 line
, lbasename (subfile
->name
),
20977 paddress (gdbarch
, address
));
20981 cu
->get_builder ()->record_line (subfile
, line
, addr
);
20984 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20985 Mark the end of a set of line number records.
20986 The arguments are the same as for dwarf_record_line_1.
20987 If SUBFILE is NULL the request is ignored. */
20990 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20991 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20993 if (subfile
== NULL
)
20996 if (dwarf_line_debug
)
20998 fprintf_unfiltered (gdb_stdlog
,
20999 "Finishing current line, file %s, address %s\n",
21000 lbasename (subfile
->name
),
21001 paddress (gdbarch
, address
));
21004 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, cu
);
21008 lnp_state_machine::record_line (bool end_sequence
)
21010 if (dwarf_line_debug
)
21012 fprintf_unfiltered (gdb_stdlog
,
21013 "Processing actual line %u: file %u,"
21014 " address %s, is_stmt %u, discrim %u\n",
21015 m_line
, to_underlying (m_file
),
21016 paddress (m_gdbarch
, m_address
),
21017 m_is_stmt
, m_discriminator
);
21020 file_entry
*fe
= current_file ();
21023 dwarf2_debug_line_missing_file_complaint ();
21024 /* For now we ignore lines not starting on an instruction boundary.
21025 But not when processing end_sequence for compatibility with the
21026 previous version of the code. */
21027 else if (m_op_index
== 0 || end_sequence
)
21029 fe
->included_p
= 1;
21030 if (m_record_lines_p
&& (producer_is_codewarrior (m_cu
) || m_is_stmt
))
21032 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
21035 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
21036 m_currently_recording_lines
? m_cu
: nullptr);
21041 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
21042 m_line_has_non_zero_discriminator
,
21045 buildsym_compunit
*builder
= m_cu
->get_builder ();
21046 dwarf_record_line_1 (m_gdbarch
,
21047 builder
->get_current_subfile (),
21049 m_currently_recording_lines
? m_cu
: nullptr);
21051 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
21052 m_last_line
= m_line
;
21058 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
21059 line_header
*lh
, bool record_lines_p
)
21063 m_record_lines_p
= record_lines_p
;
21064 m_line_header
= lh
;
21066 m_currently_recording_lines
= true;
21068 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
21069 was a line entry for it so that the backend has a chance to adjust it
21070 and also record it in case it needs it. This is currently used by MIPS
21071 code, cf. `mips_adjust_dwarf2_line'. */
21072 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
21073 m_is_stmt
= lh
->default_is_stmt
;
21074 m_discriminator
= 0;
21078 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
21079 const gdb_byte
*line_ptr
,
21080 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
21082 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
21083 the pc range of the CU. However, we restrict the test to only ADDRESS
21084 values of zero to preserve GDB's previous behaviour which is to handle
21085 the specific case of a function being GC'd by the linker. */
21087 if (address
== 0 && address
< unrelocated_lowpc
)
21089 /* This line table is for a function which has been
21090 GCd by the linker. Ignore it. PR gdb/12528 */
21092 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21093 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
21095 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
21096 line_offset
, objfile_name (objfile
));
21097 m_currently_recording_lines
= false;
21098 /* Note: m_currently_recording_lines is left as false until we see
21099 DW_LNE_end_sequence. */
21103 /* Subroutine of dwarf_decode_lines to simplify it.
21104 Process the line number information in LH.
21105 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
21106 program in order to set included_p for every referenced header. */
21109 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
21110 const int decode_for_pst_p
, CORE_ADDR lowpc
)
21112 const gdb_byte
*line_ptr
, *extended_end
;
21113 const gdb_byte
*line_end
;
21114 unsigned int bytes_read
, extended_len
;
21115 unsigned char op_code
, extended_op
;
21116 CORE_ADDR baseaddr
;
21117 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21118 bfd
*abfd
= objfile
->obfd
;
21119 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21120 /* True if we're recording line info (as opposed to building partial
21121 symtabs and just interested in finding include files mentioned by
21122 the line number program). */
21123 bool record_lines_p
= !decode_for_pst_p
;
21125 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21127 line_ptr
= lh
->statement_program_start
;
21128 line_end
= lh
->statement_program_end
;
21130 /* Read the statement sequences until there's nothing left. */
21131 while (line_ptr
< line_end
)
21133 /* The DWARF line number program state machine. Reset the state
21134 machine at the start of each sequence. */
21135 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
21136 bool end_sequence
= false;
21138 if (record_lines_p
)
21140 /* Start a subfile for the current file of the state
21142 const file_entry
*fe
= state_machine
.current_file ();
21145 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
21148 /* Decode the table. */
21149 while (line_ptr
< line_end
&& !end_sequence
)
21151 op_code
= read_1_byte (abfd
, line_ptr
);
21154 if (op_code
>= lh
->opcode_base
)
21156 /* Special opcode. */
21157 state_machine
.handle_special_opcode (op_code
);
21159 else switch (op_code
)
21161 case DW_LNS_extended_op
:
21162 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
21164 line_ptr
+= bytes_read
;
21165 extended_end
= line_ptr
+ extended_len
;
21166 extended_op
= read_1_byte (abfd
, line_ptr
);
21168 switch (extended_op
)
21170 case DW_LNE_end_sequence
:
21171 state_machine
.handle_end_sequence ();
21172 end_sequence
= true;
21174 case DW_LNE_set_address
:
21177 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
21178 line_ptr
+= bytes_read
;
21180 state_machine
.check_line_address (cu
, line_ptr
,
21181 lowpc
- baseaddr
, address
);
21182 state_machine
.handle_set_address (baseaddr
, address
);
21185 case DW_LNE_define_file
:
21187 const char *cur_file
;
21188 unsigned int mod_time
, length
;
21191 cur_file
= read_direct_string (abfd
, line_ptr
,
21193 line_ptr
+= bytes_read
;
21194 dindex
= (dir_index
)
21195 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21196 line_ptr
+= bytes_read
;
21198 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21199 line_ptr
+= bytes_read
;
21201 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21202 line_ptr
+= bytes_read
;
21203 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
21206 case DW_LNE_set_discriminator
:
21208 /* The discriminator is not interesting to the
21209 debugger; just ignore it. We still need to
21210 check its value though:
21211 if there are consecutive entries for the same
21212 (non-prologue) line we want to coalesce them.
21215 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21216 line_ptr
+= bytes_read
;
21218 state_machine
.handle_set_discriminator (discr
);
21222 complaint (_("mangled .debug_line section"));
21225 /* Make sure that we parsed the extended op correctly. If e.g.
21226 we expected a different address size than the producer used,
21227 we may have read the wrong number of bytes. */
21228 if (line_ptr
!= extended_end
)
21230 complaint (_("mangled .debug_line section"));
21235 state_machine
.handle_copy ();
21237 case DW_LNS_advance_pc
:
21240 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21241 line_ptr
+= bytes_read
;
21243 state_machine
.handle_advance_pc (adjust
);
21246 case DW_LNS_advance_line
:
21249 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
21250 line_ptr
+= bytes_read
;
21252 state_machine
.handle_advance_line (line_delta
);
21255 case DW_LNS_set_file
:
21257 file_name_index file
21258 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
21260 line_ptr
+= bytes_read
;
21262 state_machine
.handle_set_file (file
);
21265 case DW_LNS_set_column
:
21266 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21267 line_ptr
+= bytes_read
;
21269 case DW_LNS_negate_stmt
:
21270 state_machine
.handle_negate_stmt ();
21272 case DW_LNS_set_basic_block
:
21274 /* Add to the address register of the state machine the
21275 address increment value corresponding to special opcode
21276 255. I.e., this value is scaled by the minimum
21277 instruction length since special opcode 255 would have
21278 scaled the increment. */
21279 case DW_LNS_const_add_pc
:
21280 state_machine
.handle_const_add_pc ();
21282 case DW_LNS_fixed_advance_pc
:
21284 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
21287 state_machine
.handle_fixed_advance_pc (addr_adj
);
21292 /* Unknown standard opcode, ignore it. */
21295 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
21297 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21298 line_ptr
+= bytes_read
;
21305 dwarf2_debug_line_missing_end_sequence_complaint ();
21307 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
21308 in which case we still finish recording the last line). */
21309 state_machine
.record_line (true);
21313 /* Decode the Line Number Program (LNP) for the given line_header
21314 structure and CU. The actual information extracted and the type
21315 of structures created from the LNP depends on the value of PST.
21317 1. If PST is NULL, then this procedure uses the data from the program
21318 to create all necessary symbol tables, and their linetables.
21320 2. If PST is not NULL, this procedure reads the program to determine
21321 the list of files included by the unit represented by PST, and
21322 builds all the associated partial symbol tables.
21324 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21325 It is used for relative paths in the line table.
21326 NOTE: When processing partial symtabs (pst != NULL),
21327 comp_dir == pst->dirname.
21329 NOTE: It is important that psymtabs have the same file name (via strcmp)
21330 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21331 symtab we don't use it in the name of the psymtabs we create.
21332 E.g. expand_line_sal requires this when finding psymtabs to expand.
21333 A good testcase for this is mb-inline.exp.
21335 LOWPC is the lowest address in CU (or 0 if not known).
21337 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21338 for its PC<->lines mapping information. Otherwise only the filename
21339 table is read in. */
21342 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21343 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
21344 CORE_ADDR lowpc
, int decode_mapping
)
21346 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21347 const int decode_for_pst_p
= (pst
!= NULL
);
21349 if (decode_mapping
)
21350 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21352 if (decode_for_pst_p
)
21356 /* Now that we're done scanning the Line Header Program, we can
21357 create the psymtab of each included file. */
21358 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
21359 if (lh
->file_names
[file_index
].included_p
== 1)
21361 gdb::unique_xmalloc_ptr
<char> name_holder
;
21362 const char *include_name
=
21363 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
21365 if (include_name
!= NULL
)
21366 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21371 /* Make sure a symtab is created for every file, even files
21372 which contain only variables (i.e. no code with associated
21374 buildsym_compunit
*builder
= cu
->get_builder ();
21375 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
21378 for (i
= 0; i
< lh
->file_names
.size (); i
++)
21380 file_entry
&fe
= lh
->file_names
[i
];
21382 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
21384 if (builder
->get_current_subfile ()->symtab
== NULL
)
21386 builder
->get_current_subfile ()->symtab
21387 = allocate_symtab (cust
,
21388 builder
->get_current_subfile ()->name
);
21390 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
21395 /* Start a subfile for DWARF. FILENAME is the name of the file and
21396 DIRNAME the name of the source directory which contains FILENAME
21397 or NULL if not known.
21398 This routine tries to keep line numbers from identical absolute and
21399 relative file names in a common subfile.
21401 Using the `list' example from the GDB testsuite, which resides in
21402 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21403 of /srcdir/list0.c yields the following debugging information for list0.c:
21405 DW_AT_name: /srcdir/list0.c
21406 DW_AT_comp_dir: /compdir
21407 files.files[0].name: list0.h
21408 files.files[0].dir: /srcdir
21409 files.files[1].name: list0.c
21410 files.files[1].dir: /srcdir
21412 The line number information for list0.c has to end up in a single
21413 subfile, so that `break /srcdir/list0.c:1' works as expected.
21414 start_subfile will ensure that this happens provided that we pass the
21415 concatenation of files.files[1].dir and files.files[1].name as the
21419 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
21420 const char *dirname
)
21424 /* In order not to lose the line information directory,
21425 we concatenate it to the filename when it makes sense.
21426 Note that the Dwarf3 standard says (speaking of filenames in line
21427 information): ``The directory index is ignored for file names
21428 that represent full path names''. Thus ignoring dirname in the
21429 `else' branch below isn't an issue. */
21431 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21433 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21437 cu
->get_builder ()->start_subfile (filename
);
21443 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
21444 buildsym_compunit constructor. */
21446 struct compunit_symtab
*
21447 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
21450 gdb_assert (m_builder
== nullptr);
21452 m_builder
.reset (new struct buildsym_compunit
21453 (per_cu
->dwarf2_per_objfile
->objfile
,
21454 name
, comp_dir
, language
, low_pc
));
21456 list_in_scope
= get_builder ()->get_file_symbols ();
21458 get_builder ()->record_debugformat ("DWARF 2");
21459 get_builder ()->record_producer (producer
);
21461 processing_has_namespace_info
= false;
21463 return get_builder ()->get_compunit_symtab ();
21467 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21468 struct dwarf2_cu
*cu
)
21470 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21471 struct comp_unit_head
*cu_header
= &cu
->header
;
21473 /* NOTE drow/2003-01-30: There used to be a comment and some special
21474 code here to turn a symbol with DW_AT_external and a
21475 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21476 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21477 with some versions of binutils) where shared libraries could have
21478 relocations against symbols in their debug information - the
21479 minimal symbol would have the right address, but the debug info
21480 would not. It's no longer necessary, because we will explicitly
21481 apply relocations when we read in the debug information now. */
21483 /* A DW_AT_location attribute with no contents indicates that a
21484 variable has been optimized away. */
21485 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21487 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21491 /* Handle one degenerate form of location expression specially, to
21492 preserve GDB's previous behavior when section offsets are
21493 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
21494 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
21496 if (attr_form_is_block (attr
)
21497 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21498 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21499 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21500 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
21501 && (DW_BLOCK (attr
)->size
21502 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21504 unsigned int dummy
;
21506 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21507 SET_SYMBOL_VALUE_ADDRESS (sym
,
21508 read_address (objfile
->obfd
,
21509 DW_BLOCK (attr
)->data
+ 1,
21512 SET_SYMBOL_VALUE_ADDRESS
21513 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
21515 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21516 fixup_symbol_section (sym
, objfile
);
21517 SET_SYMBOL_VALUE_ADDRESS (sym
,
21518 SYMBOL_VALUE_ADDRESS (sym
)
21519 + ANOFFSET (objfile
->section_offsets
,
21520 SYMBOL_SECTION (sym
)));
21524 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21525 expression evaluator, and use LOC_COMPUTED only when necessary
21526 (i.e. when the value of a register or memory location is
21527 referenced, or a thread-local block, etc.). Then again, it might
21528 not be worthwhile. I'm assuming that it isn't unless performance
21529 or memory numbers show me otherwise. */
21531 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21533 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21534 cu
->has_loclist
= true;
21537 /* Given a pointer to a DWARF information entry, figure out if we need
21538 to make a symbol table entry for it, and if so, create a new entry
21539 and return a pointer to it.
21540 If TYPE is NULL, determine symbol type from the die, otherwise
21541 used the passed type.
21542 If SPACE is not NULL, use it to hold the new symbol. If it is
21543 NULL, allocate a new symbol on the objfile's obstack. */
21545 static struct symbol
*
21546 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21547 struct symbol
*space
)
21549 struct dwarf2_per_objfile
*dwarf2_per_objfile
21550 = cu
->per_cu
->dwarf2_per_objfile
;
21551 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21552 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21553 struct symbol
*sym
= NULL
;
21555 struct attribute
*attr
= NULL
;
21556 struct attribute
*attr2
= NULL
;
21557 CORE_ADDR baseaddr
;
21558 struct pending
**list_to_add
= NULL
;
21560 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21562 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21564 name
= dwarf2_name (die
, cu
);
21567 const char *linkagename
;
21568 int suppress_add
= 0;
21573 sym
= allocate_symbol (objfile
);
21574 OBJSTAT (objfile
, n_syms
++);
21576 /* Cache this symbol's name and the name's demangled form (if any). */
21577 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21578 linkagename
= dwarf2_physname (name
, die
, cu
);
21579 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21581 /* Fortran does not have mangling standard and the mangling does differ
21582 between gfortran, iFort etc. */
21583 if (cu
->language
== language_fortran
21584 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21585 symbol_set_demangled_name (&(sym
->ginfo
),
21586 dwarf2_full_name (name
, die
, cu
),
21589 /* Default assumptions.
21590 Use the passed type or decode it from the die. */
21591 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21592 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21594 SYMBOL_TYPE (sym
) = type
;
21596 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21597 attr
= dwarf2_attr (die
,
21598 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21602 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21605 attr
= dwarf2_attr (die
,
21606 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21610 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21611 struct file_entry
*fe
;
21613 if (cu
->line_header
!= NULL
)
21614 fe
= cu
->line_header
->file_name_at (file_index
);
21619 complaint (_("file index out of range"));
21621 symbol_set_symtab (sym
, fe
->symtab
);
21627 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21632 addr
= attr_value_as_address (attr
);
21633 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21634 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
21636 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21637 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21638 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21639 add_symbol_to_list (sym
, cu
->list_in_scope
);
21641 case DW_TAG_subprogram
:
21642 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21644 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21645 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21646 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21647 || cu
->language
== language_ada
21648 || cu
->language
== language_fortran
)
21650 /* Subprograms marked external are stored as a global symbol.
21651 Ada and Fortran subprograms, whether marked external or
21652 not, are always stored as a global symbol, because we want
21653 to be able to access them globally. For instance, we want
21654 to be able to break on a nested subprogram without having
21655 to specify the context. */
21656 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21660 list_to_add
= cu
->list_in_scope
;
21663 case DW_TAG_inlined_subroutine
:
21664 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21666 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21667 SYMBOL_INLINED (sym
) = 1;
21668 list_to_add
= cu
->list_in_scope
;
21670 case DW_TAG_template_value_param
:
21672 /* Fall through. */
21673 case DW_TAG_constant
:
21674 case DW_TAG_variable
:
21675 case DW_TAG_member
:
21676 /* Compilation with minimal debug info may result in
21677 variables with missing type entries. Change the
21678 misleading `void' type to something sensible. */
21679 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21680 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21682 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21683 /* In the case of DW_TAG_member, we should only be called for
21684 static const members. */
21685 if (die
->tag
== DW_TAG_member
)
21687 /* dwarf2_add_field uses die_is_declaration,
21688 so we do the same. */
21689 gdb_assert (die_is_declaration (die
, cu
));
21694 dwarf2_const_value (attr
, sym
, cu
);
21695 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21698 if (attr2
&& (DW_UNSND (attr2
) != 0))
21699 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21701 list_to_add
= cu
->list_in_scope
;
21705 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21708 var_decode_location (attr
, sym
, cu
);
21709 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21711 /* Fortran explicitly imports any global symbols to the local
21712 scope by DW_TAG_common_block. */
21713 if (cu
->language
== language_fortran
&& die
->parent
21714 && die
->parent
->tag
== DW_TAG_common_block
)
21717 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21718 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21719 && !dwarf2_per_objfile
->has_section_at_zero
)
21721 /* When a static variable is eliminated by the linker,
21722 the corresponding debug information is not stripped
21723 out, but the variable address is set to null;
21724 do not add such variables into symbol table. */
21726 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21728 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21729 && (objfile
->flags
& OBJF_MAINLINE
) == 0
21730 && dwarf2_per_objfile
->can_copy
)
21732 /* A global static variable might be subject to
21733 copy relocation. We first check for a local
21734 minsym, though, because maybe the symbol was
21735 marked hidden, in which case this would not
21737 bound_minimal_symbol found
21738 = (lookup_minimal_symbol_linkage
21739 (SYMBOL_LINKAGE_NAME (sym
), objfile
));
21740 if (found
.minsym
!= nullptr)
21741 sym
->maybe_copied
= 1;
21744 /* A variable with DW_AT_external is never static,
21745 but it may be block-scoped. */
21747 = ((cu
->list_in_scope
21748 == cu
->get_builder ()->get_file_symbols ())
21749 ? cu
->get_builder ()->get_global_symbols ()
21750 : cu
->list_in_scope
);
21753 list_to_add
= cu
->list_in_scope
;
21757 /* We do not know the address of this symbol.
21758 If it is an external symbol and we have type information
21759 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21760 The address of the variable will then be determined from
21761 the minimal symbol table whenever the variable is
21763 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21765 /* Fortran explicitly imports any global symbols to the local
21766 scope by DW_TAG_common_block. */
21767 if (cu
->language
== language_fortran
&& die
->parent
21768 && die
->parent
->tag
== DW_TAG_common_block
)
21770 /* SYMBOL_CLASS doesn't matter here because
21771 read_common_block is going to reset it. */
21773 list_to_add
= cu
->list_in_scope
;
21775 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21776 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21778 /* A variable with DW_AT_external is never static, but it
21779 may be block-scoped. */
21781 = ((cu
->list_in_scope
21782 == cu
->get_builder ()->get_file_symbols ())
21783 ? cu
->get_builder ()->get_global_symbols ()
21784 : cu
->list_in_scope
);
21786 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21788 else if (!die_is_declaration (die
, cu
))
21790 /* Use the default LOC_OPTIMIZED_OUT class. */
21791 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21793 list_to_add
= cu
->list_in_scope
;
21797 case DW_TAG_formal_parameter
:
21799 /* If we are inside a function, mark this as an argument. If
21800 not, we might be looking at an argument to an inlined function
21801 when we do not have enough information to show inlined frames;
21802 pretend it's a local variable in that case so that the user can
21804 struct context_stack
*curr
21805 = cu
->get_builder ()->get_current_context_stack ();
21806 if (curr
!= nullptr && curr
->name
!= nullptr)
21807 SYMBOL_IS_ARGUMENT (sym
) = 1;
21808 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21811 var_decode_location (attr
, sym
, cu
);
21813 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21816 dwarf2_const_value (attr
, sym
, cu
);
21819 list_to_add
= cu
->list_in_scope
;
21822 case DW_TAG_unspecified_parameters
:
21823 /* From varargs functions; gdb doesn't seem to have any
21824 interest in this information, so just ignore it for now.
21827 case DW_TAG_template_type_param
:
21829 /* Fall through. */
21830 case DW_TAG_class_type
:
21831 case DW_TAG_interface_type
:
21832 case DW_TAG_structure_type
:
21833 case DW_TAG_union_type
:
21834 case DW_TAG_set_type
:
21835 case DW_TAG_enumeration_type
:
21836 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21837 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21840 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21841 really ever be static objects: otherwise, if you try
21842 to, say, break of a class's method and you're in a file
21843 which doesn't mention that class, it won't work unless
21844 the check for all static symbols in lookup_symbol_aux
21845 saves you. See the OtherFileClass tests in
21846 gdb.c++/namespace.exp. */
21850 buildsym_compunit
*builder
= cu
->get_builder ();
21852 = (cu
->list_in_scope
== builder
->get_file_symbols ()
21853 && cu
->language
== language_cplus
21854 ? builder
->get_global_symbols ()
21855 : cu
->list_in_scope
);
21857 /* The semantics of C++ state that "struct foo {
21858 ... }" also defines a typedef for "foo". */
21859 if (cu
->language
== language_cplus
21860 || cu
->language
== language_ada
21861 || cu
->language
== language_d
21862 || cu
->language
== language_rust
)
21864 /* The symbol's name is already allocated along
21865 with this objfile, so we don't need to
21866 duplicate it for the type. */
21867 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21868 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21873 case DW_TAG_typedef
:
21874 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21875 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21876 list_to_add
= cu
->list_in_scope
;
21878 case DW_TAG_base_type
:
21879 case DW_TAG_subrange_type
:
21880 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21881 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21882 list_to_add
= cu
->list_in_scope
;
21884 case DW_TAG_enumerator
:
21885 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21888 dwarf2_const_value (attr
, sym
, cu
);
21891 /* NOTE: carlton/2003-11-10: See comment above in the
21892 DW_TAG_class_type, etc. block. */
21895 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
21896 && cu
->language
== language_cplus
21897 ? cu
->get_builder ()->get_global_symbols ()
21898 : cu
->list_in_scope
);
21901 case DW_TAG_imported_declaration
:
21902 case DW_TAG_namespace
:
21903 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21904 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21906 case DW_TAG_module
:
21907 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21908 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21909 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21911 case DW_TAG_common_block
:
21912 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21913 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21914 add_symbol_to_list (sym
, cu
->list_in_scope
);
21917 /* Not a tag we recognize. Hopefully we aren't processing
21918 trash data, but since we must specifically ignore things
21919 we don't recognize, there is nothing else we should do at
21921 complaint (_("unsupported tag: '%s'"),
21922 dwarf_tag_name (die
->tag
));
21928 sym
->hash_next
= objfile
->template_symbols
;
21929 objfile
->template_symbols
= sym
;
21930 list_to_add
= NULL
;
21933 if (list_to_add
!= NULL
)
21934 add_symbol_to_list (sym
, list_to_add
);
21936 /* For the benefit of old versions of GCC, check for anonymous
21937 namespaces based on the demangled name. */
21938 if (!cu
->processing_has_namespace_info
21939 && cu
->language
== language_cplus
)
21940 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21945 /* Given an attr with a DW_FORM_dataN value in host byte order,
21946 zero-extend it as appropriate for the symbol's type. The DWARF
21947 standard (v4) is not entirely clear about the meaning of using
21948 DW_FORM_dataN for a constant with a signed type, where the type is
21949 wider than the data. The conclusion of a discussion on the DWARF
21950 list was that this is unspecified. We choose to always zero-extend
21951 because that is the interpretation long in use by GCC. */
21954 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21955 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21957 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21958 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21959 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21960 LONGEST l
= DW_UNSND (attr
);
21962 if (bits
< sizeof (*value
) * 8)
21964 l
&= ((LONGEST
) 1 << bits
) - 1;
21967 else if (bits
== sizeof (*value
) * 8)
21971 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21972 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21979 /* Read a constant value from an attribute. Either set *VALUE, or if
21980 the value does not fit in *VALUE, set *BYTES - either already
21981 allocated on the objfile obstack, or newly allocated on OBSTACK,
21982 or, set *BATON, if we translated the constant to a location
21986 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21987 const char *name
, struct obstack
*obstack
,
21988 struct dwarf2_cu
*cu
,
21989 LONGEST
*value
, const gdb_byte
**bytes
,
21990 struct dwarf2_locexpr_baton
**baton
)
21992 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21993 struct comp_unit_head
*cu_header
= &cu
->header
;
21994 struct dwarf_block
*blk
;
21995 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21996 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22002 switch (attr
->form
)
22005 case DW_FORM_addrx
:
22006 case DW_FORM_GNU_addr_index
:
22010 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
22011 dwarf2_const_value_length_mismatch_complaint (name
,
22012 cu_header
->addr_size
,
22013 TYPE_LENGTH (type
));
22014 /* Symbols of this form are reasonably rare, so we just
22015 piggyback on the existing location code rather than writing
22016 a new implementation of symbol_computed_ops. */
22017 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
22018 (*baton
)->per_cu
= cu
->per_cu
;
22019 gdb_assert ((*baton
)->per_cu
);
22021 (*baton
)->size
= 2 + cu_header
->addr_size
;
22022 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
22023 (*baton
)->data
= data
;
22025 data
[0] = DW_OP_addr
;
22026 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
22027 byte_order
, DW_ADDR (attr
));
22028 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
22031 case DW_FORM_string
:
22034 case DW_FORM_GNU_str_index
:
22035 case DW_FORM_GNU_strp_alt
:
22036 /* DW_STRING is already allocated on the objfile obstack, point
22038 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
22040 case DW_FORM_block1
:
22041 case DW_FORM_block2
:
22042 case DW_FORM_block4
:
22043 case DW_FORM_block
:
22044 case DW_FORM_exprloc
:
22045 case DW_FORM_data16
:
22046 blk
= DW_BLOCK (attr
);
22047 if (TYPE_LENGTH (type
) != blk
->size
)
22048 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
22049 TYPE_LENGTH (type
));
22050 *bytes
= blk
->data
;
22053 /* The DW_AT_const_value attributes are supposed to carry the
22054 symbol's value "represented as it would be on the target
22055 architecture." By the time we get here, it's already been
22056 converted to host endianness, so we just need to sign- or
22057 zero-extend it as appropriate. */
22058 case DW_FORM_data1
:
22059 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
22061 case DW_FORM_data2
:
22062 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
22064 case DW_FORM_data4
:
22065 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
22067 case DW_FORM_data8
:
22068 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
22071 case DW_FORM_sdata
:
22072 case DW_FORM_implicit_const
:
22073 *value
= DW_SND (attr
);
22076 case DW_FORM_udata
:
22077 *value
= DW_UNSND (attr
);
22081 complaint (_("unsupported const value attribute form: '%s'"),
22082 dwarf_form_name (attr
->form
));
22089 /* Copy constant value from an attribute to a symbol. */
22092 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
22093 struct dwarf2_cu
*cu
)
22095 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22097 const gdb_byte
*bytes
;
22098 struct dwarf2_locexpr_baton
*baton
;
22100 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
22101 SYMBOL_PRINT_NAME (sym
),
22102 &objfile
->objfile_obstack
, cu
,
22103 &value
, &bytes
, &baton
);
22107 SYMBOL_LOCATION_BATON (sym
) = baton
;
22108 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
22110 else if (bytes
!= NULL
)
22112 SYMBOL_VALUE_BYTES (sym
) = bytes
;
22113 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
22117 SYMBOL_VALUE (sym
) = value
;
22118 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
22122 /* Return the type of the die in question using its DW_AT_type attribute. */
22124 static struct type
*
22125 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22127 struct attribute
*type_attr
;
22129 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
22132 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22133 /* A missing DW_AT_type represents a void type. */
22134 return objfile_type (objfile
)->builtin_void
;
22137 return lookup_die_type (die
, type_attr
, cu
);
22140 /* True iff CU's producer generates GNAT Ada auxiliary information
22141 that allows to find parallel types through that information instead
22142 of having to do expensive parallel lookups by type name. */
22145 need_gnat_info (struct dwarf2_cu
*cu
)
22147 /* Assume that the Ada compiler was GNAT, which always produces
22148 the auxiliary information. */
22149 return (cu
->language
== language_ada
);
22152 /* Return the auxiliary type of the die in question using its
22153 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
22154 attribute is not present. */
22156 static struct type
*
22157 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22159 struct attribute
*type_attr
;
22161 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
22165 return lookup_die_type (die
, type_attr
, cu
);
22168 /* If DIE has a descriptive_type attribute, then set the TYPE's
22169 descriptive type accordingly. */
22172 set_descriptive_type (struct type
*type
, struct die_info
*die
,
22173 struct dwarf2_cu
*cu
)
22175 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
22177 if (descriptive_type
)
22179 ALLOCATE_GNAT_AUX_TYPE (type
);
22180 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
22184 /* Return the containing type of the die in question using its
22185 DW_AT_containing_type attribute. */
22187 static struct type
*
22188 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22190 struct attribute
*type_attr
;
22191 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22193 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
22195 error (_("Dwarf Error: Problem turning containing type into gdb type "
22196 "[in module %s]"), objfile_name (objfile
));
22198 return lookup_die_type (die
, type_attr
, cu
);
22201 /* Return an error marker type to use for the ill formed type in DIE/CU. */
22203 static struct type
*
22204 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
22206 struct dwarf2_per_objfile
*dwarf2_per_objfile
22207 = cu
->per_cu
->dwarf2_per_objfile
;
22208 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22211 std::string message
22212 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
22213 objfile_name (objfile
),
22214 sect_offset_str (cu
->header
.sect_off
),
22215 sect_offset_str (die
->sect_off
));
22216 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
22218 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
22221 /* Look up the type of DIE in CU using its type attribute ATTR.
22222 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
22223 DW_AT_containing_type.
22224 If there is no type substitute an error marker. */
22226 static struct type
*
22227 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
22228 struct dwarf2_cu
*cu
)
22230 struct dwarf2_per_objfile
*dwarf2_per_objfile
22231 = cu
->per_cu
->dwarf2_per_objfile
;
22232 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22233 struct type
*this_type
;
22235 gdb_assert (attr
->name
== DW_AT_type
22236 || attr
->name
== DW_AT_GNAT_descriptive_type
22237 || attr
->name
== DW_AT_containing_type
);
22239 /* First see if we have it cached. */
22241 if (attr
->form
== DW_FORM_GNU_ref_alt
)
22243 struct dwarf2_per_cu_data
*per_cu
;
22244 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22246 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
22247 dwarf2_per_objfile
);
22248 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
22250 else if (attr_form_is_ref (attr
))
22252 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22254 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
22256 else if (attr
->form
== DW_FORM_ref_sig8
)
22258 ULONGEST signature
= DW_SIGNATURE (attr
);
22260 return get_signatured_type (die
, signature
, cu
);
22264 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
22265 " at %s [in module %s]"),
22266 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
22267 objfile_name (objfile
));
22268 return build_error_marker_type (cu
, die
);
22271 /* If not cached we need to read it in. */
22273 if (this_type
== NULL
)
22275 struct die_info
*type_die
= NULL
;
22276 struct dwarf2_cu
*type_cu
= cu
;
22278 if (attr_form_is_ref (attr
))
22279 type_die
= follow_die_ref (die
, attr
, &type_cu
);
22280 if (type_die
== NULL
)
22281 return build_error_marker_type (cu
, die
);
22282 /* If we find the type now, it's probably because the type came
22283 from an inter-CU reference and the type's CU got expanded before
22285 this_type
= read_type_die (type_die
, type_cu
);
22288 /* If we still don't have a type use an error marker. */
22290 if (this_type
== NULL
)
22291 return build_error_marker_type (cu
, die
);
22296 /* Return the type in DIE, CU.
22297 Returns NULL for invalid types.
22299 This first does a lookup in die_type_hash,
22300 and only reads the die in if necessary.
22302 NOTE: This can be called when reading in partial or full symbols. */
22304 static struct type
*
22305 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
22307 struct type
*this_type
;
22309 this_type
= get_die_type (die
, cu
);
22313 return read_type_die_1 (die
, cu
);
22316 /* Read the type in DIE, CU.
22317 Returns NULL for invalid types. */
22319 static struct type
*
22320 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
22322 struct type
*this_type
= NULL
;
22326 case DW_TAG_class_type
:
22327 case DW_TAG_interface_type
:
22328 case DW_TAG_structure_type
:
22329 case DW_TAG_union_type
:
22330 this_type
= read_structure_type (die
, cu
);
22332 case DW_TAG_enumeration_type
:
22333 this_type
= read_enumeration_type (die
, cu
);
22335 case DW_TAG_subprogram
:
22336 case DW_TAG_subroutine_type
:
22337 case DW_TAG_inlined_subroutine
:
22338 this_type
= read_subroutine_type (die
, cu
);
22340 case DW_TAG_array_type
:
22341 this_type
= read_array_type (die
, cu
);
22343 case DW_TAG_set_type
:
22344 this_type
= read_set_type (die
, cu
);
22346 case DW_TAG_pointer_type
:
22347 this_type
= read_tag_pointer_type (die
, cu
);
22349 case DW_TAG_ptr_to_member_type
:
22350 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22352 case DW_TAG_reference_type
:
22353 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22355 case DW_TAG_rvalue_reference_type
:
22356 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22358 case DW_TAG_const_type
:
22359 this_type
= read_tag_const_type (die
, cu
);
22361 case DW_TAG_volatile_type
:
22362 this_type
= read_tag_volatile_type (die
, cu
);
22364 case DW_TAG_restrict_type
:
22365 this_type
= read_tag_restrict_type (die
, cu
);
22367 case DW_TAG_string_type
:
22368 this_type
= read_tag_string_type (die
, cu
);
22370 case DW_TAG_typedef
:
22371 this_type
= read_typedef (die
, cu
);
22373 case DW_TAG_subrange_type
:
22374 this_type
= read_subrange_type (die
, cu
);
22376 case DW_TAG_base_type
:
22377 this_type
= read_base_type (die
, cu
);
22379 case DW_TAG_unspecified_type
:
22380 this_type
= read_unspecified_type (die
, cu
);
22382 case DW_TAG_namespace
:
22383 this_type
= read_namespace_type (die
, cu
);
22385 case DW_TAG_module
:
22386 this_type
= read_module_type (die
, cu
);
22388 case DW_TAG_atomic_type
:
22389 this_type
= read_tag_atomic_type (die
, cu
);
22392 complaint (_("unexpected tag in read_type_die: '%s'"),
22393 dwarf_tag_name (die
->tag
));
22400 /* See if we can figure out if the class lives in a namespace. We do
22401 this by looking for a member function; its demangled name will
22402 contain namespace info, if there is any.
22403 Return the computed name or NULL.
22404 Space for the result is allocated on the objfile's obstack.
22405 This is the full-die version of guess_partial_die_structure_name.
22406 In this case we know DIE has no useful parent. */
22409 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22411 struct die_info
*spec_die
;
22412 struct dwarf2_cu
*spec_cu
;
22413 struct die_info
*child
;
22414 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22417 spec_die
= die_specification (die
, &spec_cu
);
22418 if (spec_die
!= NULL
)
22424 for (child
= die
->child
;
22426 child
= child
->sibling
)
22428 if (child
->tag
== DW_TAG_subprogram
)
22430 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22432 if (linkage_name
!= NULL
)
22435 = language_class_name_from_physname (cu
->language_defn
,
22439 if (actual_name
!= NULL
)
22441 const char *die_name
= dwarf2_name (die
, cu
);
22443 if (die_name
!= NULL
22444 && strcmp (die_name
, actual_name
) != 0)
22446 /* Strip off the class name from the full name.
22447 We want the prefix. */
22448 int die_name_len
= strlen (die_name
);
22449 int actual_name_len
= strlen (actual_name
);
22451 /* Test for '::' as a sanity check. */
22452 if (actual_name_len
> die_name_len
+ 2
22453 && actual_name
[actual_name_len
22454 - die_name_len
- 1] == ':')
22455 name
= obstack_strndup (
22456 &objfile
->per_bfd
->storage_obstack
,
22457 actual_name
, actual_name_len
- die_name_len
- 2);
22460 xfree (actual_name
);
22469 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22470 prefix part in such case. See
22471 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22473 static const char *
22474 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22476 struct attribute
*attr
;
22479 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22480 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22483 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22486 attr
= dw2_linkage_name_attr (die
, cu
);
22487 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22490 /* dwarf2_name had to be already called. */
22491 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22493 /* Strip the base name, keep any leading namespaces/classes. */
22494 base
= strrchr (DW_STRING (attr
), ':');
22495 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22498 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22499 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
22501 &base
[-1] - DW_STRING (attr
));
22504 /* Return the name of the namespace/class that DIE is defined within,
22505 or "" if we can't tell. The caller should not xfree the result.
22507 For example, if we're within the method foo() in the following
22517 then determine_prefix on foo's die will return "N::C". */
22519 static const char *
22520 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22522 struct dwarf2_per_objfile
*dwarf2_per_objfile
22523 = cu
->per_cu
->dwarf2_per_objfile
;
22524 struct die_info
*parent
, *spec_die
;
22525 struct dwarf2_cu
*spec_cu
;
22526 struct type
*parent_type
;
22527 const char *retval
;
22529 if (cu
->language
!= language_cplus
22530 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22531 && cu
->language
!= language_rust
)
22534 retval
= anonymous_struct_prefix (die
, cu
);
22538 /* We have to be careful in the presence of DW_AT_specification.
22539 For example, with GCC 3.4, given the code
22543 // Definition of N::foo.
22547 then we'll have a tree of DIEs like this:
22549 1: DW_TAG_compile_unit
22550 2: DW_TAG_namespace // N
22551 3: DW_TAG_subprogram // declaration of N::foo
22552 4: DW_TAG_subprogram // definition of N::foo
22553 DW_AT_specification // refers to die #3
22555 Thus, when processing die #4, we have to pretend that we're in
22556 the context of its DW_AT_specification, namely the contex of die
22559 spec_die
= die_specification (die
, &spec_cu
);
22560 if (spec_die
== NULL
)
22561 parent
= die
->parent
;
22564 parent
= spec_die
->parent
;
22568 if (parent
== NULL
)
22570 else if (parent
->building_fullname
)
22573 const char *parent_name
;
22575 /* It has been seen on RealView 2.2 built binaries,
22576 DW_TAG_template_type_param types actually _defined_ as
22577 children of the parent class:
22580 template class <class Enum> Class{};
22581 Class<enum E> class_e;
22583 1: DW_TAG_class_type (Class)
22584 2: DW_TAG_enumeration_type (E)
22585 3: DW_TAG_enumerator (enum1:0)
22586 3: DW_TAG_enumerator (enum2:1)
22588 2: DW_TAG_template_type_param
22589 DW_AT_type DW_FORM_ref_udata (E)
22591 Besides being broken debug info, it can put GDB into an
22592 infinite loop. Consider:
22594 When we're building the full name for Class<E>, we'll start
22595 at Class, and go look over its template type parameters,
22596 finding E. We'll then try to build the full name of E, and
22597 reach here. We're now trying to build the full name of E,
22598 and look over the parent DIE for containing scope. In the
22599 broken case, if we followed the parent DIE of E, we'd again
22600 find Class, and once again go look at its template type
22601 arguments, etc., etc. Simply don't consider such parent die
22602 as source-level parent of this die (it can't be, the language
22603 doesn't allow it), and break the loop here. */
22604 name
= dwarf2_name (die
, cu
);
22605 parent_name
= dwarf2_name (parent
, cu
);
22606 complaint (_("template param type '%s' defined within parent '%s'"),
22607 name
? name
: "<unknown>",
22608 parent_name
? parent_name
: "<unknown>");
22612 switch (parent
->tag
)
22614 case DW_TAG_namespace
:
22615 parent_type
= read_type_die (parent
, cu
);
22616 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22617 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22618 Work around this problem here. */
22619 if (cu
->language
== language_cplus
22620 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
22622 /* We give a name to even anonymous namespaces. */
22623 return TYPE_NAME (parent_type
);
22624 case DW_TAG_class_type
:
22625 case DW_TAG_interface_type
:
22626 case DW_TAG_structure_type
:
22627 case DW_TAG_union_type
:
22628 case DW_TAG_module
:
22629 parent_type
= read_type_die (parent
, cu
);
22630 if (TYPE_NAME (parent_type
) != NULL
)
22631 return TYPE_NAME (parent_type
);
22633 /* An anonymous structure is only allowed non-static data
22634 members; no typedefs, no member functions, et cetera.
22635 So it does not need a prefix. */
22637 case DW_TAG_compile_unit
:
22638 case DW_TAG_partial_unit
:
22639 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22640 if (cu
->language
== language_cplus
22641 && !dwarf2_per_objfile
->types
.empty ()
22642 && die
->child
!= NULL
22643 && (die
->tag
== DW_TAG_class_type
22644 || die
->tag
== DW_TAG_structure_type
22645 || die
->tag
== DW_TAG_union_type
))
22647 char *name
= guess_full_die_structure_name (die
, cu
);
22652 case DW_TAG_subprogram
:
22653 /* Nested subroutines in Fortran get a prefix with the name
22654 of the parent's subroutine. */
22655 if (cu
->language
== language_fortran
)
22657 if ((die
->tag
== DW_TAG_subprogram
)
22658 && (dwarf2_name (parent
, cu
) != NULL
))
22659 return dwarf2_name (parent
, cu
);
22661 return determine_prefix (parent
, cu
);
22662 case DW_TAG_enumeration_type
:
22663 parent_type
= read_type_die (parent
, cu
);
22664 if (TYPE_DECLARED_CLASS (parent_type
))
22666 if (TYPE_NAME (parent_type
) != NULL
)
22667 return TYPE_NAME (parent_type
);
22670 /* Fall through. */
22672 return determine_prefix (parent
, cu
);
22676 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22677 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22678 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22679 an obconcat, otherwise allocate storage for the result. The CU argument is
22680 used to determine the language and hence, the appropriate separator. */
22682 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22685 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22686 int physname
, struct dwarf2_cu
*cu
)
22688 const char *lead
= "";
22691 if (suffix
== NULL
|| suffix
[0] == '\0'
22692 || prefix
== NULL
|| prefix
[0] == '\0')
22694 else if (cu
->language
== language_d
)
22696 /* For D, the 'main' function could be defined in any module, but it
22697 should never be prefixed. */
22698 if (strcmp (suffix
, "D main") == 0)
22706 else if (cu
->language
== language_fortran
&& physname
)
22708 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22709 DW_AT_MIPS_linkage_name is preferred and used instead. */
22717 if (prefix
== NULL
)
22719 if (suffix
== NULL
)
22726 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22728 strcpy (retval
, lead
);
22729 strcat (retval
, prefix
);
22730 strcat (retval
, sep
);
22731 strcat (retval
, suffix
);
22736 /* We have an obstack. */
22737 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22741 /* Return sibling of die, NULL if no sibling. */
22743 static struct die_info
*
22744 sibling_die (struct die_info
*die
)
22746 return die
->sibling
;
22749 /* Get name of a die, return NULL if not found. */
22751 static const char *
22752 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22753 struct obstack
*obstack
)
22755 if (name
&& cu
->language
== language_cplus
)
22757 std::string canon_name
= cp_canonicalize_string (name
);
22759 if (!canon_name
.empty ())
22761 if (canon_name
!= name
)
22762 name
= obstack_strdup (obstack
, canon_name
);
22769 /* Get name of a die, return NULL if not found.
22770 Anonymous namespaces are converted to their magic string. */
22772 static const char *
22773 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22775 struct attribute
*attr
;
22776 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22778 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22779 if ((!attr
|| !DW_STRING (attr
))
22780 && die
->tag
!= DW_TAG_namespace
22781 && die
->tag
!= DW_TAG_class_type
22782 && die
->tag
!= DW_TAG_interface_type
22783 && die
->tag
!= DW_TAG_structure_type
22784 && die
->tag
!= DW_TAG_union_type
)
22789 case DW_TAG_compile_unit
:
22790 case DW_TAG_partial_unit
:
22791 /* Compilation units have a DW_AT_name that is a filename, not
22792 a source language identifier. */
22793 case DW_TAG_enumeration_type
:
22794 case DW_TAG_enumerator
:
22795 /* These tags always have simple identifiers already; no need
22796 to canonicalize them. */
22797 return DW_STRING (attr
);
22799 case DW_TAG_namespace
:
22800 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22801 return DW_STRING (attr
);
22802 return CP_ANONYMOUS_NAMESPACE_STR
;
22804 case DW_TAG_class_type
:
22805 case DW_TAG_interface_type
:
22806 case DW_TAG_structure_type
:
22807 case DW_TAG_union_type
:
22808 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22809 structures or unions. These were of the form "._%d" in GCC 4.1,
22810 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22811 and GCC 4.4. We work around this problem by ignoring these. */
22812 if (attr
&& DW_STRING (attr
)
22813 && (startswith (DW_STRING (attr
), "._")
22814 || startswith (DW_STRING (attr
), "<anonymous")))
22817 /* GCC might emit a nameless typedef that has a linkage name. See
22818 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22819 if (!attr
|| DW_STRING (attr
) == NULL
)
22821 char *demangled
= NULL
;
22823 attr
= dw2_linkage_name_attr (die
, cu
);
22824 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22827 /* Avoid demangling DW_STRING (attr) the second time on a second
22828 call for the same DIE. */
22829 if (!DW_STRING_IS_CANONICAL (attr
))
22830 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22836 /* FIXME: we already did this for the partial symbol... */
22838 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
22840 DW_STRING_IS_CANONICAL (attr
) = 1;
22843 /* Strip any leading namespaces/classes, keep only the base name.
22844 DW_AT_name for named DIEs does not contain the prefixes. */
22845 base
= strrchr (DW_STRING (attr
), ':');
22846 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22849 return DW_STRING (attr
);
22858 if (!DW_STRING_IS_CANONICAL (attr
))
22861 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22862 &objfile
->per_bfd
->storage_obstack
);
22863 DW_STRING_IS_CANONICAL (attr
) = 1;
22865 return DW_STRING (attr
);
22868 /* Return the die that this die in an extension of, or NULL if there
22869 is none. *EXT_CU is the CU containing DIE on input, and the CU
22870 containing the return value on output. */
22872 static struct die_info
*
22873 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22875 struct attribute
*attr
;
22877 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22881 return follow_die_ref (die
, attr
, ext_cu
);
22884 /* A convenience function that returns an "unknown" DWARF name,
22885 including the value of V. STR is the name of the entity being
22886 printed, e.g., "TAG". */
22888 static const char *
22889 dwarf_unknown (const char *str
, unsigned v
)
22891 char *cell
= get_print_cell ();
22892 xsnprintf (cell
, PRINT_CELL_SIZE
, "DW_%s_<unknown: %u>", str
, v
);
22896 /* Convert a DIE tag into its string name. */
22898 static const char *
22899 dwarf_tag_name (unsigned tag
)
22901 const char *name
= get_DW_TAG_name (tag
);
22904 return dwarf_unknown ("TAG", tag
);
22909 /* Convert a DWARF attribute code into its string name. */
22911 static const char *
22912 dwarf_attr_name (unsigned attr
)
22916 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22917 if (attr
== DW_AT_MIPS_fde
)
22918 return "DW_AT_MIPS_fde";
22920 if (attr
== DW_AT_HP_block_index
)
22921 return "DW_AT_HP_block_index";
22924 name
= get_DW_AT_name (attr
);
22927 return dwarf_unknown ("AT", attr
);
22932 /* Convert a unit type to corresponding DW_UT name. */
22934 static const char *
22935 dwarf_unit_type_name (int unit_type
) {
22939 return "DW_UT_compile (0x01)";
22941 return "DW_UT_type (0x02)";
22943 return "DW_UT_partial (0x03)";
22945 return "DW_UT_skeleton (0x04)";
22947 return "DW_UT_split_compile (0x05)";
22949 return "DW_UT_split_type (0x06)";
22951 return "DW_UT_lo_user (0x80)";
22953 return "DW_UT_hi_user (0xff)";
22959 /* Convert a DWARF value form code into its string name. */
22961 static const char *
22962 dwarf_form_name (unsigned form
)
22964 const char *name
= get_DW_FORM_name (form
);
22967 return dwarf_unknown ("FORM", form
);
22972 static const char *
22973 dwarf_bool_name (unsigned mybool
)
22981 /* Convert a DWARF type code into its string name. */
22983 static const char *
22984 dwarf_type_encoding_name (unsigned enc
)
22986 const char *name
= get_DW_ATE_name (enc
);
22989 return dwarf_unknown ("ATE", enc
);
22995 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22999 print_spaces (indent
, f
);
23000 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
23001 dwarf_tag_name (die
->tag
), die
->abbrev
,
23002 sect_offset_str (die
->sect_off
));
23004 if (die
->parent
!= NULL
)
23006 print_spaces (indent
, f
);
23007 fprintf_unfiltered (f
, " parent at offset: %s\n",
23008 sect_offset_str (die
->parent
->sect_off
));
23011 print_spaces (indent
, f
);
23012 fprintf_unfiltered (f
, " has children: %s\n",
23013 dwarf_bool_name (die
->child
!= NULL
));
23015 print_spaces (indent
, f
);
23016 fprintf_unfiltered (f
, " attributes:\n");
23018 for (i
= 0; i
< die
->num_attrs
; ++i
)
23020 print_spaces (indent
, f
);
23021 fprintf_unfiltered (f
, " %s (%s) ",
23022 dwarf_attr_name (die
->attrs
[i
].name
),
23023 dwarf_form_name (die
->attrs
[i
].form
));
23025 switch (die
->attrs
[i
].form
)
23028 case DW_FORM_addrx
:
23029 case DW_FORM_GNU_addr_index
:
23030 fprintf_unfiltered (f
, "address: ");
23031 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
23033 case DW_FORM_block2
:
23034 case DW_FORM_block4
:
23035 case DW_FORM_block
:
23036 case DW_FORM_block1
:
23037 fprintf_unfiltered (f
, "block: size %s",
23038 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
23040 case DW_FORM_exprloc
:
23041 fprintf_unfiltered (f
, "expression: size %s",
23042 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
23044 case DW_FORM_data16
:
23045 fprintf_unfiltered (f
, "constant of 16 bytes");
23047 case DW_FORM_ref_addr
:
23048 fprintf_unfiltered (f
, "ref address: ");
23049 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
23051 case DW_FORM_GNU_ref_alt
:
23052 fprintf_unfiltered (f
, "alt ref address: ");
23053 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
23059 case DW_FORM_ref_udata
:
23060 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
23061 (long) (DW_UNSND (&die
->attrs
[i
])));
23063 case DW_FORM_data1
:
23064 case DW_FORM_data2
:
23065 case DW_FORM_data4
:
23066 case DW_FORM_data8
:
23067 case DW_FORM_udata
:
23068 case DW_FORM_sdata
:
23069 fprintf_unfiltered (f
, "constant: %s",
23070 pulongest (DW_UNSND (&die
->attrs
[i
])));
23072 case DW_FORM_sec_offset
:
23073 fprintf_unfiltered (f
, "section offset: %s",
23074 pulongest (DW_UNSND (&die
->attrs
[i
])));
23076 case DW_FORM_ref_sig8
:
23077 fprintf_unfiltered (f
, "signature: %s",
23078 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
23080 case DW_FORM_string
:
23082 case DW_FORM_line_strp
:
23084 case DW_FORM_GNU_str_index
:
23085 case DW_FORM_GNU_strp_alt
:
23086 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
23087 DW_STRING (&die
->attrs
[i
])
23088 ? DW_STRING (&die
->attrs
[i
]) : "",
23089 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
23092 if (DW_UNSND (&die
->attrs
[i
]))
23093 fprintf_unfiltered (f
, "flag: TRUE");
23095 fprintf_unfiltered (f
, "flag: FALSE");
23097 case DW_FORM_flag_present
:
23098 fprintf_unfiltered (f
, "flag: TRUE");
23100 case DW_FORM_indirect
:
23101 /* The reader will have reduced the indirect form to
23102 the "base form" so this form should not occur. */
23103 fprintf_unfiltered (f
,
23104 "unexpected attribute form: DW_FORM_indirect");
23106 case DW_FORM_implicit_const
:
23107 fprintf_unfiltered (f
, "constant: %s",
23108 plongest (DW_SND (&die
->attrs
[i
])));
23111 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
23112 die
->attrs
[i
].form
);
23115 fprintf_unfiltered (f
, "\n");
23120 dump_die_for_error (struct die_info
*die
)
23122 dump_die_shallow (gdb_stderr
, 0, die
);
23126 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
23128 int indent
= level
* 4;
23130 gdb_assert (die
!= NULL
);
23132 if (level
>= max_level
)
23135 dump_die_shallow (f
, indent
, die
);
23137 if (die
->child
!= NULL
)
23139 print_spaces (indent
, f
);
23140 fprintf_unfiltered (f
, " Children:");
23141 if (level
+ 1 < max_level
)
23143 fprintf_unfiltered (f
, "\n");
23144 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
23148 fprintf_unfiltered (f
,
23149 " [not printed, max nesting level reached]\n");
23153 if (die
->sibling
!= NULL
&& level
> 0)
23155 dump_die_1 (f
, level
, max_level
, die
->sibling
);
23159 /* This is called from the pdie macro in gdbinit.in.
23160 It's not static so gcc will keep a copy callable from gdb. */
23163 dump_die (struct die_info
*die
, int max_level
)
23165 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
23169 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
23173 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
23174 to_underlying (die
->sect_off
),
23180 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
23184 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
23186 if (attr_form_is_ref (attr
))
23187 return (sect_offset
) DW_UNSND (attr
);
23189 complaint (_("unsupported die ref attribute form: '%s'"),
23190 dwarf_form_name (attr
->form
));
23194 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
23195 * the value held by the attribute is not constant. */
23198 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
23200 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
23201 return DW_SND (attr
);
23202 else if (attr
->form
== DW_FORM_udata
23203 || attr
->form
== DW_FORM_data1
23204 || attr
->form
== DW_FORM_data2
23205 || attr
->form
== DW_FORM_data4
23206 || attr
->form
== DW_FORM_data8
)
23207 return DW_UNSND (attr
);
23210 /* For DW_FORM_data16 see attr_form_is_constant. */
23211 complaint (_("Attribute value is not a constant (%s)"),
23212 dwarf_form_name (attr
->form
));
23213 return default_value
;
23217 /* Follow reference or signature attribute ATTR of SRC_DIE.
23218 On entry *REF_CU is the CU of SRC_DIE.
23219 On exit *REF_CU is the CU of the result. */
23221 static struct die_info
*
23222 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23223 struct dwarf2_cu
**ref_cu
)
23225 struct die_info
*die
;
23227 if (attr_form_is_ref (attr
))
23228 die
= follow_die_ref (src_die
, attr
, ref_cu
);
23229 else if (attr
->form
== DW_FORM_ref_sig8
)
23230 die
= follow_die_sig (src_die
, attr
, ref_cu
);
23233 dump_die_for_error (src_die
);
23234 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
23235 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23241 /* Follow reference OFFSET.
23242 On entry *REF_CU is the CU of the source die referencing OFFSET.
23243 On exit *REF_CU is the CU of the result.
23244 Returns NULL if OFFSET is invalid. */
23246 static struct die_info
*
23247 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
23248 struct dwarf2_cu
**ref_cu
)
23250 struct die_info temp_die
;
23251 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
23252 struct dwarf2_per_objfile
*dwarf2_per_objfile
23253 = cu
->per_cu
->dwarf2_per_objfile
;
23255 gdb_assert (cu
->per_cu
!= NULL
);
23259 if (cu
->per_cu
->is_debug_types
)
23261 /* .debug_types CUs cannot reference anything outside their CU.
23262 If they need to, they have to reference a signatured type via
23263 DW_FORM_ref_sig8. */
23264 if (!offset_in_cu_p (&cu
->header
, sect_off
))
23267 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
23268 || !offset_in_cu_p (&cu
->header
, sect_off
))
23270 struct dwarf2_per_cu_data
*per_cu
;
23272 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23273 dwarf2_per_objfile
);
23275 /* If necessary, add it to the queue and load its DIEs. */
23276 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
23277 load_full_comp_unit (per_cu
, false, cu
->language
);
23279 target_cu
= per_cu
->cu
;
23281 else if (cu
->dies
== NULL
)
23283 /* We're loading full DIEs during partial symbol reading. */
23284 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
23285 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
23288 *ref_cu
= target_cu
;
23289 temp_die
.sect_off
= sect_off
;
23291 if (target_cu
!= cu
)
23292 target_cu
->ancestor
= cu
;
23294 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
23296 to_underlying (sect_off
));
23299 /* Follow reference attribute ATTR of SRC_DIE.
23300 On entry *REF_CU is the CU of SRC_DIE.
23301 On exit *REF_CU is the CU of the result. */
23303 static struct die_info
*
23304 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
23305 struct dwarf2_cu
**ref_cu
)
23307 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
23308 struct dwarf2_cu
*cu
= *ref_cu
;
23309 struct die_info
*die
;
23311 die
= follow_die_offset (sect_off
,
23312 (attr
->form
== DW_FORM_GNU_ref_alt
23313 || cu
->per_cu
->is_dwz
),
23316 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
23317 "at %s [in module %s]"),
23318 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
23319 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
23324 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
23325 Returned value is intended for DW_OP_call*. Returned
23326 dwarf2_locexpr_baton->data has lifetime of
23327 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
23329 struct dwarf2_locexpr_baton
23330 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
23331 struct dwarf2_per_cu_data
*per_cu
,
23332 CORE_ADDR (*get_frame_pc
) (void *baton
),
23333 void *baton
, bool resolve_abstract_p
)
23335 struct dwarf2_cu
*cu
;
23336 struct die_info
*die
;
23337 struct attribute
*attr
;
23338 struct dwarf2_locexpr_baton retval
;
23339 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23340 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23342 if (per_cu
->cu
== NULL
)
23343 load_cu (per_cu
, false);
23347 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23348 Instead just throw an error, not much else we can do. */
23349 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23350 sect_offset_str (sect_off
), objfile_name (objfile
));
23353 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23355 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23356 sect_offset_str (sect_off
), objfile_name (objfile
));
23358 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23359 if (!attr
&& resolve_abstract_p
23360 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
23361 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
23363 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23365 = ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23366 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
23368 for (const auto &cand_off
23369 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
23371 struct dwarf2_cu
*cand_cu
= cu
;
23372 struct die_info
*cand
23373 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
23376 || cand
->parent
->tag
!= DW_TAG_subprogram
)
23379 CORE_ADDR pc_low
, pc_high
;
23380 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
23381 if (pc_low
== ((CORE_ADDR
) -1))
23383 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
23384 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
23385 if (!(pc_low
<= pc
&& pc
< pc_high
))
23389 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23396 /* DWARF: "If there is no such attribute, then there is no effect.".
23397 DATA is ignored if SIZE is 0. */
23399 retval
.data
= NULL
;
23402 else if (attr_form_is_section_offset (attr
))
23404 struct dwarf2_loclist_baton loclist_baton
;
23405 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23408 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
23410 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
23412 retval
.size
= size
;
23416 if (!attr_form_is_block (attr
))
23417 error (_("Dwarf Error: DIE at %s referenced in module %s "
23418 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23419 sect_offset_str (sect_off
), objfile_name (objfile
));
23421 retval
.data
= DW_BLOCK (attr
)->data
;
23422 retval
.size
= DW_BLOCK (attr
)->size
;
23424 retval
.per_cu
= cu
->per_cu
;
23426 age_cached_comp_units (dwarf2_per_objfile
);
23431 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
23434 struct dwarf2_locexpr_baton
23435 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23436 struct dwarf2_per_cu_data
*per_cu
,
23437 CORE_ADDR (*get_frame_pc
) (void *baton
),
23440 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23442 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
23445 /* Write a constant of a given type as target-ordered bytes into
23448 static const gdb_byte
*
23449 write_constant_as_bytes (struct obstack
*obstack
,
23450 enum bfd_endian byte_order
,
23457 *len
= TYPE_LENGTH (type
);
23458 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23459 store_unsigned_integer (result
, *len
, byte_order
, value
);
23464 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23465 pointer to the constant bytes and set LEN to the length of the
23466 data. If memory is needed, allocate it on OBSTACK. If the DIE
23467 does not have a DW_AT_const_value, return NULL. */
23470 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23471 struct dwarf2_per_cu_data
*per_cu
,
23472 struct obstack
*obstack
,
23475 struct dwarf2_cu
*cu
;
23476 struct die_info
*die
;
23477 struct attribute
*attr
;
23478 const gdb_byte
*result
= NULL
;
23481 enum bfd_endian byte_order
;
23482 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23484 if (per_cu
->cu
== NULL
)
23485 load_cu (per_cu
, false);
23489 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23490 Instead just throw an error, not much else we can do. */
23491 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23492 sect_offset_str (sect_off
), objfile_name (objfile
));
23495 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23497 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23498 sect_offset_str (sect_off
), objfile_name (objfile
));
23500 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23504 byte_order
= (bfd_big_endian (objfile
->obfd
)
23505 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23507 switch (attr
->form
)
23510 case DW_FORM_addrx
:
23511 case DW_FORM_GNU_addr_index
:
23515 *len
= cu
->header
.addr_size
;
23516 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23517 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23521 case DW_FORM_string
:
23524 case DW_FORM_GNU_str_index
:
23525 case DW_FORM_GNU_strp_alt
:
23526 /* DW_STRING is already allocated on the objfile obstack, point
23528 result
= (const gdb_byte
*) DW_STRING (attr
);
23529 *len
= strlen (DW_STRING (attr
));
23531 case DW_FORM_block1
:
23532 case DW_FORM_block2
:
23533 case DW_FORM_block4
:
23534 case DW_FORM_block
:
23535 case DW_FORM_exprloc
:
23536 case DW_FORM_data16
:
23537 result
= DW_BLOCK (attr
)->data
;
23538 *len
= DW_BLOCK (attr
)->size
;
23541 /* The DW_AT_const_value attributes are supposed to carry the
23542 symbol's value "represented as it would be on the target
23543 architecture." By the time we get here, it's already been
23544 converted to host endianness, so we just need to sign- or
23545 zero-extend it as appropriate. */
23546 case DW_FORM_data1
:
23547 type
= die_type (die
, cu
);
23548 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23549 if (result
== NULL
)
23550 result
= write_constant_as_bytes (obstack
, byte_order
,
23553 case DW_FORM_data2
:
23554 type
= die_type (die
, cu
);
23555 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23556 if (result
== NULL
)
23557 result
= write_constant_as_bytes (obstack
, byte_order
,
23560 case DW_FORM_data4
:
23561 type
= die_type (die
, cu
);
23562 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23563 if (result
== NULL
)
23564 result
= write_constant_as_bytes (obstack
, byte_order
,
23567 case DW_FORM_data8
:
23568 type
= die_type (die
, cu
);
23569 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23570 if (result
== NULL
)
23571 result
= write_constant_as_bytes (obstack
, byte_order
,
23575 case DW_FORM_sdata
:
23576 case DW_FORM_implicit_const
:
23577 type
= die_type (die
, cu
);
23578 result
= write_constant_as_bytes (obstack
, byte_order
,
23579 type
, DW_SND (attr
), len
);
23582 case DW_FORM_udata
:
23583 type
= die_type (die
, cu
);
23584 result
= write_constant_as_bytes (obstack
, byte_order
,
23585 type
, DW_UNSND (attr
), len
);
23589 complaint (_("unsupported const value attribute form: '%s'"),
23590 dwarf_form_name (attr
->form
));
23597 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23598 valid type for this die is found. */
23601 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23602 struct dwarf2_per_cu_data
*per_cu
)
23604 struct dwarf2_cu
*cu
;
23605 struct die_info
*die
;
23607 if (per_cu
->cu
== NULL
)
23608 load_cu (per_cu
, false);
23613 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23617 return die_type (die
, cu
);
23620 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23624 dwarf2_get_die_type (cu_offset die_offset
,
23625 struct dwarf2_per_cu_data
*per_cu
)
23627 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23628 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23631 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23632 On entry *REF_CU is the CU of SRC_DIE.
23633 On exit *REF_CU is the CU of the result.
23634 Returns NULL if the referenced DIE isn't found. */
23636 static struct die_info
*
23637 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23638 struct dwarf2_cu
**ref_cu
)
23640 struct die_info temp_die
;
23641 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
23642 struct die_info
*die
;
23644 /* While it might be nice to assert sig_type->type == NULL here,
23645 we can get here for DW_AT_imported_declaration where we need
23646 the DIE not the type. */
23648 /* If necessary, add it to the queue and load its DIEs. */
23650 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23651 read_signatured_type (sig_type
);
23653 sig_cu
= sig_type
->per_cu
.cu
;
23654 gdb_assert (sig_cu
!= NULL
);
23655 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23656 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23657 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23658 to_underlying (temp_die
.sect_off
));
23661 struct dwarf2_per_objfile
*dwarf2_per_objfile
23662 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23664 /* For .gdb_index version 7 keep track of included TUs.
23665 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23666 if (dwarf2_per_objfile
->index_table
!= NULL
23667 && dwarf2_per_objfile
->index_table
->version
<= 7)
23669 VEC_safe_push (dwarf2_per_cu_ptr
,
23670 (*ref_cu
)->per_cu
->imported_symtabs
,
23676 sig_cu
->ancestor
= cu
;
23684 /* Follow signatured type referenced by ATTR in SRC_DIE.
23685 On entry *REF_CU is the CU of SRC_DIE.
23686 On exit *REF_CU is the CU of the result.
23687 The result is the DIE of the type.
23688 If the referenced type cannot be found an error is thrown. */
23690 static struct die_info
*
23691 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23692 struct dwarf2_cu
**ref_cu
)
23694 ULONGEST signature
= DW_SIGNATURE (attr
);
23695 struct signatured_type
*sig_type
;
23696 struct die_info
*die
;
23698 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23700 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23701 /* sig_type will be NULL if the signatured type is missing from
23703 if (sig_type
== NULL
)
23705 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23706 " from DIE at %s [in module %s]"),
23707 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23708 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23711 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23714 dump_die_for_error (src_die
);
23715 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23716 " from DIE at %s [in module %s]"),
23717 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23718 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23724 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23725 reading in and processing the type unit if necessary. */
23727 static struct type
*
23728 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23729 struct dwarf2_cu
*cu
)
23731 struct dwarf2_per_objfile
*dwarf2_per_objfile
23732 = cu
->per_cu
->dwarf2_per_objfile
;
23733 struct signatured_type
*sig_type
;
23734 struct dwarf2_cu
*type_cu
;
23735 struct die_info
*type_die
;
23738 sig_type
= lookup_signatured_type (cu
, signature
);
23739 /* sig_type will be NULL if the signatured type is missing from
23741 if (sig_type
== NULL
)
23743 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23744 " from DIE at %s [in module %s]"),
23745 hex_string (signature
), sect_offset_str (die
->sect_off
),
23746 objfile_name (dwarf2_per_objfile
->objfile
));
23747 return build_error_marker_type (cu
, die
);
23750 /* If we already know the type we're done. */
23751 if (sig_type
->type
!= NULL
)
23752 return sig_type
->type
;
23755 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23756 if (type_die
!= NULL
)
23758 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23759 is created. This is important, for example, because for c++ classes
23760 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23761 type
= read_type_die (type_die
, type_cu
);
23764 complaint (_("Dwarf Error: Cannot build signatured type %s"
23765 " referenced from DIE at %s [in module %s]"),
23766 hex_string (signature
), sect_offset_str (die
->sect_off
),
23767 objfile_name (dwarf2_per_objfile
->objfile
));
23768 type
= build_error_marker_type (cu
, die
);
23773 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23774 " from DIE at %s [in module %s]"),
23775 hex_string (signature
), sect_offset_str (die
->sect_off
),
23776 objfile_name (dwarf2_per_objfile
->objfile
));
23777 type
= build_error_marker_type (cu
, die
);
23779 sig_type
->type
= type
;
23784 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23785 reading in and processing the type unit if necessary. */
23787 static struct type
*
23788 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23789 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23791 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23792 if (attr_form_is_ref (attr
))
23794 struct dwarf2_cu
*type_cu
= cu
;
23795 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23797 return read_type_die (type_die
, type_cu
);
23799 else if (attr
->form
== DW_FORM_ref_sig8
)
23801 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23805 struct dwarf2_per_objfile
*dwarf2_per_objfile
23806 = cu
->per_cu
->dwarf2_per_objfile
;
23808 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23809 " at %s [in module %s]"),
23810 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23811 objfile_name (dwarf2_per_objfile
->objfile
));
23812 return build_error_marker_type (cu
, die
);
23816 /* Load the DIEs associated with type unit PER_CU into memory. */
23819 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23821 struct signatured_type
*sig_type
;
23823 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23824 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23826 /* We have the per_cu, but we need the signatured_type.
23827 Fortunately this is an easy translation. */
23828 gdb_assert (per_cu
->is_debug_types
);
23829 sig_type
= (struct signatured_type
*) per_cu
;
23831 gdb_assert (per_cu
->cu
== NULL
);
23833 read_signatured_type (sig_type
);
23835 gdb_assert (per_cu
->cu
!= NULL
);
23838 /* die_reader_func for read_signatured_type.
23839 This is identical to load_full_comp_unit_reader,
23840 but is kept separate for now. */
23843 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23844 const gdb_byte
*info_ptr
,
23845 struct die_info
*comp_unit_die
,
23849 struct dwarf2_cu
*cu
= reader
->cu
;
23851 gdb_assert (cu
->die_hash
== NULL
);
23853 htab_create_alloc_ex (cu
->header
.length
/ 12,
23857 &cu
->comp_unit_obstack
,
23858 hashtab_obstack_allocate
,
23859 dummy_obstack_deallocate
);
23862 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23863 &info_ptr
, comp_unit_die
);
23864 cu
->dies
= comp_unit_die
;
23865 /* comp_unit_die is not stored in die_hash, no need. */
23867 /* We try not to read any attributes in this function, because not
23868 all CUs needed for references have been loaded yet, and symbol
23869 table processing isn't initialized. But we have to set the CU language,
23870 or we won't be able to build types correctly.
23871 Similarly, if we do not read the producer, we can not apply
23872 producer-specific interpretation. */
23873 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23876 /* Read in a signatured type and build its CU and DIEs.
23877 If the type is a stub for the real type in a DWO file,
23878 read in the real type from the DWO file as well. */
23881 read_signatured_type (struct signatured_type
*sig_type
)
23883 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23885 gdb_assert (per_cu
->is_debug_types
);
23886 gdb_assert (per_cu
->cu
== NULL
);
23888 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1, false,
23889 read_signatured_type_reader
, NULL
);
23890 sig_type
->per_cu
.tu_read
= 1;
23893 /* Decode simple location descriptions.
23894 Given a pointer to a dwarf block that defines a location, compute
23895 the location and return the value.
23897 NOTE drow/2003-11-18: This function is called in two situations
23898 now: for the address of static or global variables (partial symbols
23899 only) and for offsets into structures which are expected to be
23900 (more or less) constant. The partial symbol case should go away,
23901 and only the constant case should remain. That will let this
23902 function complain more accurately. A few special modes are allowed
23903 without complaint for global variables (for instance, global
23904 register values and thread-local values).
23906 A location description containing no operations indicates that the
23907 object is optimized out. The return value is 0 for that case.
23908 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23909 callers will only want a very basic result and this can become a
23912 Note that stack[0] is unused except as a default error return. */
23915 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23917 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23919 size_t size
= blk
->size
;
23920 const gdb_byte
*data
= blk
->data
;
23921 CORE_ADDR stack
[64];
23923 unsigned int bytes_read
, unsnd
;
23929 stack
[++stacki
] = 0;
23968 stack
[++stacki
] = op
- DW_OP_lit0
;
24003 stack
[++stacki
] = op
- DW_OP_reg0
;
24005 dwarf2_complex_location_expr_complaint ();
24009 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
24011 stack
[++stacki
] = unsnd
;
24013 dwarf2_complex_location_expr_complaint ();
24017 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
24022 case DW_OP_const1u
:
24023 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
24027 case DW_OP_const1s
:
24028 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
24032 case DW_OP_const2u
:
24033 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
24037 case DW_OP_const2s
:
24038 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
24042 case DW_OP_const4u
:
24043 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
24047 case DW_OP_const4s
:
24048 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
24052 case DW_OP_const8u
:
24053 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
24058 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
24064 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
24069 stack
[stacki
+ 1] = stack
[stacki
];
24074 stack
[stacki
- 1] += stack
[stacki
];
24078 case DW_OP_plus_uconst
:
24079 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
24085 stack
[stacki
- 1] -= stack
[stacki
];
24090 /* If we're not the last op, then we definitely can't encode
24091 this using GDB's address_class enum. This is valid for partial
24092 global symbols, although the variable's address will be bogus
24095 dwarf2_complex_location_expr_complaint ();
24098 case DW_OP_GNU_push_tls_address
:
24099 case DW_OP_form_tls_address
:
24100 /* The top of the stack has the offset from the beginning
24101 of the thread control block at which the variable is located. */
24102 /* Nothing should follow this operator, so the top of stack would
24104 /* This is valid for partial global symbols, but the variable's
24105 address will be bogus in the psymtab. Make it always at least
24106 non-zero to not look as a variable garbage collected by linker
24107 which have DW_OP_addr 0. */
24109 dwarf2_complex_location_expr_complaint ();
24113 case DW_OP_GNU_uninit
:
24117 case DW_OP_GNU_addr_index
:
24118 case DW_OP_GNU_const_index
:
24119 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
24126 const char *name
= get_DW_OP_name (op
);
24129 complaint (_("unsupported stack op: '%s'"),
24132 complaint (_("unsupported stack op: '%02x'"),
24136 return (stack
[stacki
]);
24139 /* Enforce maximum stack depth of SIZE-1 to avoid writing
24140 outside of the allocated space. Also enforce minimum>0. */
24141 if (stacki
>= ARRAY_SIZE (stack
) - 1)
24143 complaint (_("location description stack overflow"));
24149 complaint (_("location description stack underflow"));
24153 return (stack
[stacki
]);
24156 /* memory allocation interface */
24158 static struct dwarf_block
*
24159 dwarf_alloc_block (struct dwarf2_cu
*cu
)
24161 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
24164 static struct die_info
*
24165 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
24167 struct die_info
*die
;
24168 size_t size
= sizeof (struct die_info
);
24171 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
24173 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
24174 memset (die
, 0, sizeof (struct die_info
));
24179 /* Macro support. */
24181 /* Return file name relative to the compilation directory of file number I in
24182 *LH's file name table. The result is allocated using xmalloc; the caller is
24183 responsible for freeing it. */
24186 file_file_name (int file
, struct line_header
*lh
)
24188 /* Is the file number a valid index into the line header's file name
24189 table? Remember that file numbers start with one, not zero. */
24190 if (1 <= file
&& file
<= lh
->file_names
.size ())
24192 const file_entry
&fe
= lh
->file_names
[file
- 1];
24194 if (!IS_ABSOLUTE_PATH (fe
.name
))
24196 const char *dir
= fe
.include_dir (lh
);
24198 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
24200 return xstrdup (fe
.name
);
24204 /* The compiler produced a bogus file number. We can at least
24205 record the macro definitions made in the file, even if we
24206 won't be able to find the file by name. */
24207 char fake_name
[80];
24209 xsnprintf (fake_name
, sizeof (fake_name
),
24210 "<bad macro file number %d>", file
);
24212 complaint (_("bad file number in macro information (%d)"),
24215 return xstrdup (fake_name
);
24219 /* Return the full name of file number I in *LH's file name table.
24220 Use COMP_DIR as the name of the current directory of the
24221 compilation. The result is allocated using xmalloc; the caller is
24222 responsible for freeing it. */
24224 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
24226 /* Is the file number a valid index into the line header's file name
24227 table? Remember that file numbers start with one, not zero. */
24228 if (1 <= file
&& file
<= lh
->file_names
.size ())
24230 char *relative
= file_file_name (file
, lh
);
24232 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
24234 return reconcat (relative
, comp_dir
, SLASH_STRING
,
24235 relative
, (char *) NULL
);
24238 return file_file_name (file
, lh
);
24242 static struct macro_source_file
*
24243 macro_start_file (struct dwarf2_cu
*cu
,
24244 int file
, int line
,
24245 struct macro_source_file
*current_file
,
24246 struct line_header
*lh
)
24248 /* File name relative to the compilation directory of this source file. */
24249 char *file_name
= file_file_name (file
, lh
);
24251 if (! current_file
)
24253 /* Note: We don't create a macro table for this compilation unit
24254 at all until we actually get a filename. */
24255 struct macro_table
*macro_table
= cu
->get_builder ()->get_macro_table ();
24257 /* If we have no current file, then this must be the start_file
24258 directive for the compilation unit's main source file. */
24259 current_file
= macro_set_main (macro_table
, file_name
);
24260 macro_define_special (macro_table
);
24263 current_file
= macro_include (current_file
, line
, file_name
);
24267 return current_file
;
24270 static const char *
24271 consume_improper_spaces (const char *p
, const char *body
)
24275 complaint (_("macro definition contains spaces "
24276 "in formal argument list:\n`%s'"),
24288 parse_macro_definition (struct macro_source_file
*file
, int line
,
24293 /* The body string takes one of two forms. For object-like macro
24294 definitions, it should be:
24296 <macro name> " " <definition>
24298 For function-like macro definitions, it should be:
24300 <macro name> "() " <definition>
24302 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
24304 Spaces may appear only where explicitly indicated, and in the
24307 The Dwarf 2 spec says that an object-like macro's name is always
24308 followed by a space, but versions of GCC around March 2002 omit
24309 the space when the macro's definition is the empty string.
24311 The Dwarf 2 spec says that there should be no spaces between the
24312 formal arguments in a function-like macro's formal argument list,
24313 but versions of GCC around March 2002 include spaces after the
24317 /* Find the extent of the macro name. The macro name is terminated
24318 by either a space or null character (for an object-like macro) or
24319 an opening paren (for a function-like macro). */
24320 for (p
= body
; *p
; p
++)
24321 if (*p
== ' ' || *p
== '(')
24324 if (*p
== ' ' || *p
== '\0')
24326 /* It's an object-like macro. */
24327 int name_len
= p
- body
;
24328 char *name
= savestring (body
, name_len
);
24329 const char *replacement
;
24332 replacement
= body
+ name_len
+ 1;
24335 dwarf2_macro_malformed_definition_complaint (body
);
24336 replacement
= body
+ name_len
;
24339 macro_define_object (file
, line
, name
, replacement
);
24343 else if (*p
== '(')
24345 /* It's a function-like macro. */
24346 char *name
= savestring (body
, p
- body
);
24349 char **argv
= XNEWVEC (char *, argv_size
);
24353 p
= consume_improper_spaces (p
, body
);
24355 /* Parse the formal argument list. */
24356 while (*p
&& *p
!= ')')
24358 /* Find the extent of the current argument name. */
24359 const char *arg_start
= p
;
24361 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
24364 if (! *p
|| p
== arg_start
)
24365 dwarf2_macro_malformed_definition_complaint (body
);
24368 /* Make sure argv has room for the new argument. */
24369 if (argc
>= argv_size
)
24372 argv
= XRESIZEVEC (char *, argv
, argv_size
);
24375 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
24378 p
= consume_improper_spaces (p
, body
);
24380 /* Consume the comma, if present. */
24385 p
= consume_improper_spaces (p
, body
);
24394 /* Perfectly formed definition, no complaints. */
24395 macro_define_function (file
, line
, name
,
24396 argc
, (const char **) argv
,
24398 else if (*p
== '\0')
24400 /* Complain, but do define it. */
24401 dwarf2_macro_malformed_definition_complaint (body
);
24402 macro_define_function (file
, line
, name
,
24403 argc
, (const char **) argv
,
24407 /* Just complain. */
24408 dwarf2_macro_malformed_definition_complaint (body
);
24411 /* Just complain. */
24412 dwarf2_macro_malformed_definition_complaint (body
);
24418 for (i
= 0; i
< argc
; i
++)
24424 dwarf2_macro_malformed_definition_complaint (body
);
24427 /* Skip some bytes from BYTES according to the form given in FORM.
24428 Returns the new pointer. */
24430 static const gdb_byte
*
24431 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
24432 enum dwarf_form form
,
24433 unsigned int offset_size
,
24434 struct dwarf2_section_info
*section
)
24436 unsigned int bytes_read
;
24440 case DW_FORM_data1
:
24445 case DW_FORM_data2
:
24449 case DW_FORM_data4
:
24453 case DW_FORM_data8
:
24457 case DW_FORM_data16
:
24461 case DW_FORM_string
:
24462 read_direct_string (abfd
, bytes
, &bytes_read
);
24463 bytes
+= bytes_read
;
24466 case DW_FORM_sec_offset
:
24468 case DW_FORM_GNU_strp_alt
:
24469 bytes
+= offset_size
;
24472 case DW_FORM_block
:
24473 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24474 bytes
+= bytes_read
;
24477 case DW_FORM_block1
:
24478 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24480 case DW_FORM_block2
:
24481 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24483 case DW_FORM_block4
:
24484 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24487 case DW_FORM_addrx
:
24488 case DW_FORM_sdata
:
24490 case DW_FORM_udata
:
24491 case DW_FORM_GNU_addr_index
:
24492 case DW_FORM_GNU_str_index
:
24493 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24496 dwarf2_section_buffer_overflow_complaint (section
);
24501 case DW_FORM_implicit_const
:
24506 complaint (_("invalid form 0x%x in `%s'"),
24507 form
, get_section_name (section
));
24515 /* A helper for dwarf_decode_macros that handles skipping an unknown
24516 opcode. Returns an updated pointer to the macro data buffer; or,
24517 on error, issues a complaint and returns NULL. */
24519 static const gdb_byte
*
24520 skip_unknown_opcode (unsigned int opcode
,
24521 const gdb_byte
**opcode_definitions
,
24522 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24524 unsigned int offset_size
,
24525 struct dwarf2_section_info
*section
)
24527 unsigned int bytes_read
, i
;
24529 const gdb_byte
*defn
;
24531 if (opcode_definitions
[opcode
] == NULL
)
24533 complaint (_("unrecognized DW_MACFINO opcode 0x%x"),
24538 defn
= opcode_definitions
[opcode
];
24539 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24540 defn
+= bytes_read
;
24542 for (i
= 0; i
< arg
; ++i
)
24544 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24545 (enum dwarf_form
) defn
[i
], offset_size
,
24547 if (mac_ptr
== NULL
)
24549 /* skip_form_bytes already issued the complaint. */
24557 /* A helper function which parses the header of a macro section.
24558 If the macro section is the extended (for now called "GNU") type,
24559 then this updates *OFFSET_SIZE. Returns a pointer to just after
24560 the header, or issues a complaint and returns NULL on error. */
24562 static const gdb_byte
*
24563 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24565 const gdb_byte
*mac_ptr
,
24566 unsigned int *offset_size
,
24567 int section_is_gnu
)
24569 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24571 if (section_is_gnu
)
24573 unsigned int version
, flags
;
24575 version
= read_2_bytes (abfd
, mac_ptr
);
24576 if (version
!= 4 && version
!= 5)
24578 complaint (_("unrecognized version `%d' in .debug_macro section"),
24584 flags
= read_1_byte (abfd
, mac_ptr
);
24586 *offset_size
= (flags
& 1) ? 8 : 4;
24588 if ((flags
& 2) != 0)
24589 /* We don't need the line table offset. */
24590 mac_ptr
+= *offset_size
;
24592 /* Vendor opcode descriptions. */
24593 if ((flags
& 4) != 0)
24595 unsigned int i
, count
;
24597 count
= read_1_byte (abfd
, mac_ptr
);
24599 for (i
= 0; i
< count
; ++i
)
24601 unsigned int opcode
, bytes_read
;
24604 opcode
= read_1_byte (abfd
, mac_ptr
);
24606 opcode_definitions
[opcode
] = mac_ptr
;
24607 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24608 mac_ptr
+= bytes_read
;
24617 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24618 including DW_MACRO_import. */
24621 dwarf_decode_macro_bytes (struct dwarf2_cu
*cu
,
24623 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24624 struct macro_source_file
*current_file
,
24625 struct line_header
*lh
,
24626 struct dwarf2_section_info
*section
,
24627 int section_is_gnu
, int section_is_dwz
,
24628 unsigned int offset_size
,
24629 htab_t include_hash
)
24631 struct dwarf2_per_objfile
*dwarf2_per_objfile
24632 = cu
->per_cu
->dwarf2_per_objfile
;
24633 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24634 enum dwarf_macro_record_type macinfo_type
;
24635 int at_commandline
;
24636 const gdb_byte
*opcode_definitions
[256];
24638 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24639 &offset_size
, section_is_gnu
);
24640 if (mac_ptr
== NULL
)
24642 /* We already issued a complaint. */
24646 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24647 GDB is still reading the definitions from command line. First
24648 DW_MACINFO_start_file will need to be ignored as it was already executed
24649 to create CURRENT_FILE for the main source holding also the command line
24650 definitions. On first met DW_MACINFO_start_file this flag is reset to
24651 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24653 at_commandline
= 1;
24657 /* Do we at least have room for a macinfo type byte? */
24658 if (mac_ptr
>= mac_end
)
24660 dwarf2_section_buffer_overflow_complaint (section
);
24664 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24667 /* Note that we rely on the fact that the corresponding GNU and
24668 DWARF constants are the same. */
24670 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24671 switch (macinfo_type
)
24673 /* A zero macinfo type indicates the end of the macro
24678 case DW_MACRO_define
:
24679 case DW_MACRO_undef
:
24680 case DW_MACRO_define_strp
:
24681 case DW_MACRO_undef_strp
:
24682 case DW_MACRO_define_sup
:
24683 case DW_MACRO_undef_sup
:
24685 unsigned int bytes_read
;
24690 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24691 mac_ptr
+= bytes_read
;
24693 if (macinfo_type
== DW_MACRO_define
24694 || macinfo_type
== DW_MACRO_undef
)
24696 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24697 mac_ptr
+= bytes_read
;
24701 LONGEST str_offset
;
24703 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24704 mac_ptr
+= offset_size
;
24706 if (macinfo_type
== DW_MACRO_define_sup
24707 || macinfo_type
== DW_MACRO_undef_sup
24710 struct dwz_file
*dwz
24711 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24713 body
= read_indirect_string_from_dwz (objfile
,
24717 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24721 is_define
= (macinfo_type
== DW_MACRO_define
24722 || macinfo_type
== DW_MACRO_define_strp
24723 || macinfo_type
== DW_MACRO_define_sup
);
24724 if (! current_file
)
24726 /* DWARF violation as no main source is present. */
24727 complaint (_("debug info with no main source gives macro %s "
24729 is_define
? _("definition") : _("undefinition"),
24733 if ((line
== 0 && !at_commandline
)
24734 || (line
!= 0 && at_commandline
))
24735 complaint (_("debug info gives %s macro %s with %s line %d: %s"),
24736 at_commandline
? _("command-line") : _("in-file"),
24737 is_define
? _("definition") : _("undefinition"),
24738 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24742 /* Fedora's rpm-build's "debugedit" binary
24743 corrupted .debug_macro sections.
24746 https://bugzilla.redhat.com/show_bug.cgi?id=1708786 */
24747 complaint (_("debug info gives %s invalid macro %s "
24748 "without body (corrupted?) at line %d "
24750 at_commandline
? _("command-line") : _("in-file"),
24751 is_define
? _("definition") : _("undefinition"),
24752 line
, current_file
->filename
);
24754 else if (is_define
)
24755 parse_macro_definition (current_file
, line
, body
);
24758 gdb_assert (macinfo_type
== DW_MACRO_undef
24759 || macinfo_type
== DW_MACRO_undef_strp
24760 || macinfo_type
== DW_MACRO_undef_sup
);
24761 macro_undef (current_file
, line
, body
);
24766 case DW_MACRO_start_file
:
24768 unsigned int bytes_read
;
24771 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24772 mac_ptr
+= bytes_read
;
24773 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24774 mac_ptr
+= bytes_read
;
24776 if ((line
== 0 && !at_commandline
)
24777 || (line
!= 0 && at_commandline
))
24778 complaint (_("debug info gives source %d included "
24779 "from %s at %s line %d"),
24780 file
, at_commandline
? _("command-line") : _("file"),
24781 line
== 0 ? _("zero") : _("non-zero"), line
);
24783 if (at_commandline
)
24785 /* This DW_MACRO_start_file was executed in the
24787 at_commandline
= 0;
24790 current_file
= macro_start_file (cu
, file
, line
, current_file
,
24795 case DW_MACRO_end_file
:
24796 if (! current_file
)
24797 complaint (_("macro debug info has an unmatched "
24798 "`close_file' directive"));
24801 current_file
= current_file
->included_by
;
24802 if (! current_file
)
24804 enum dwarf_macro_record_type next_type
;
24806 /* GCC circa March 2002 doesn't produce the zero
24807 type byte marking the end of the compilation
24808 unit. Complain if it's not there, but exit no
24811 /* Do we at least have room for a macinfo type byte? */
24812 if (mac_ptr
>= mac_end
)
24814 dwarf2_section_buffer_overflow_complaint (section
);
24818 /* We don't increment mac_ptr here, so this is just
24821 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24823 if (next_type
!= 0)
24824 complaint (_("no terminating 0-type entry for "
24825 "macros in `.debug_macinfo' section"));
24832 case DW_MACRO_import
:
24833 case DW_MACRO_import_sup
:
24837 bfd
*include_bfd
= abfd
;
24838 struct dwarf2_section_info
*include_section
= section
;
24839 const gdb_byte
*include_mac_end
= mac_end
;
24840 int is_dwz
= section_is_dwz
;
24841 const gdb_byte
*new_mac_ptr
;
24843 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24844 mac_ptr
+= offset_size
;
24846 if (macinfo_type
== DW_MACRO_import_sup
)
24848 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24850 dwarf2_read_section (objfile
, &dwz
->macro
);
24852 include_section
= &dwz
->macro
;
24853 include_bfd
= get_section_bfd_owner (include_section
);
24854 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24858 new_mac_ptr
= include_section
->buffer
+ offset
;
24859 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24863 /* This has actually happened; see
24864 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24865 complaint (_("recursive DW_MACRO_import in "
24866 ".debug_macro section"));
24870 *slot
= (void *) new_mac_ptr
;
24872 dwarf_decode_macro_bytes (cu
, include_bfd
, new_mac_ptr
,
24873 include_mac_end
, current_file
, lh
,
24874 section
, section_is_gnu
, is_dwz
,
24875 offset_size
, include_hash
);
24877 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24882 case DW_MACINFO_vendor_ext
:
24883 if (!section_is_gnu
)
24885 unsigned int bytes_read
;
24887 /* This reads the constant, but since we don't recognize
24888 any vendor extensions, we ignore it. */
24889 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24890 mac_ptr
+= bytes_read
;
24891 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24892 mac_ptr
+= bytes_read
;
24894 /* We don't recognize any vendor extensions. */
24900 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24901 mac_ptr
, mac_end
, abfd
, offset_size
,
24903 if (mac_ptr
== NULL
)
24908 } while (macinfo_type
!= 0);
24912 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24913 int section_is_gnu
)
24915 struct dwarf2_per_objfile
*dwarf2_per_objfile
24916 = cu
->per_cu
->dwarf2_per_objfile
;
24917 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24918 struct line_header
*lh
= cu
->line_header
;
24920 const gdb_byte
*mac_ptr
, *mac_end
;
24921 struct macro_source_file
*current_file
= 0;
24922 enum dwarf_macro_record_type macinfo_type
;
24923 unsigned int offset_size
= cu
->header
.offset_size
;
24924 const gdb_byte
*opcode_definitions
[256];
24926 struct dwarf2_section_info
*section
;
24927 const char *section_name
;
24929 if (cu
->dwo_unit
!= NULL
)
24931 if (section_is_gnu
)
24933 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24934 section_name
= ".debug_macro.dwo";
24938 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24939 section_name
= ".debug_macinfo.dwo";
24944 if (section_is_gnu
)
24946 section
= &dwarf2_per_objfile
->macro
;
24947 section_name
= ".debug_macro";
24951 section
= &dwarf2_per_objfile
->macinfo
;
24952 section_name
= ".debug_macinfo";
24956 dwarf2_read_section (objfile
, section
);
24957 if (section
->buffer
== NULL
)
24959 complaint (_("missing %s section"), section_name
);
24962 abfd
= get_section_bfd_owner (section
);
24964 /* First pass: Find the name of the base filename.
24965 This filename is needed in order to process all macros whose definition
24966 (or undefinition) comes from the command line. These macros are defined
24967 before the first DW_MACINFO_start_file entry, and yet still need to be
24968 associated to the base file.
24970 To determine the base file name, we scan the macro definitions until we
24971 reach the first DW_MACINFO_start_file entry. We then initialize
24972 CURRENT_FILE accordingly so that any macro definition found before the
24973 first DW_MACINFO_start_file can still be associated to the base file. */
24975 mac_ptr
= section
->buffer
+ offset
;
24976 mac_end
= section
->buffer
+ section
->size
;
24978 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24979 &offset_size
, section_is_gnu
);
24980 if (mac_ptr
== NULL
)
24982 /* We already issued a complaint. */
24988 /* Do we at least have room for a macinfo type byte? */
24989 if (mac_ptr
>= mac_end
)
24991 /* Complaint is printed during the second pass as GDB will probably
24992 stop the first pass earlier upon finding
24993 DW_MACINFO_start_file. */
24997 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
25000 /* Note that we rely on the fact that the corresponding GNU and
25001 DWARF constants are the same. */
25003 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
25004 switch (macinfo_type
)
25006 /* A zero macinfo type indicates the end of the macro
25011 case DW_MACRO_define
:
25012 case DW_MACRO_undef
:
25013 /* Only skip the data by MAC_PTR. */
25015 unsigned int bytes_read
;
25017 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25018 mac_ptr
+= bytes_read
;
25019 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
25020 mac_ptr
+= bytes_read
;
25024 case DW_MACRO_start_file
:
25026 unsigned int bytes_read
;
25029 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25030 mac_ptr
+= bytes_read
;
25031 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25032 mac_ptr
+= bytes_read
;
25034 current_file
= macro_start_file (cu
, file
, line
, current_file
, lh
);
25038 case DW_MACRO_end_file
:
25039 /* No data to skip by MAC_PTR. */
25042 case DW_MACRO_define_strp
:
25043 case DW_MACRO_undef_strp
:
25044 case DW_MACRO_define_sup
:
25045 case DW_MACRO_undef_sup
:
25047 unsigned int bytes_read
;
25049 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25050 mac_ptr
+= bytes_read
;
25051 mac_ptr
+= offset_size
;
25055 case DW_MACRO_import
:
25056 case DW_MACRO_import_sup
:
25057 /* Note that, according to the spec, a transparent include
25058 chain cannot call DW_MACRO_start_file. So, we can just
25059 skip this opcode. */
25060 mac_ptr
+= offset_size
;
25063 case DW_MACINFO_vendor_ext
:
25064 /* Only skip the data by MAC_PTR. */
25065 if (!section_is_gnu
)
25067 unsigned int bytes_read
;
25069 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25070 mac_ptr
+= bytes_read
;
25071 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
25072 mac_ptr
+= bytes_read
;
25077 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
25078 mac_ptr
, mac_end
, abfd
, offset_size
,
25080 if (mac_ptr
== NULL
)
25085 } while (macinfo_type
!= 0 && current_file
== NULL
);
25087 /* Second pass: Process all entries.
25089 Use the AT_COMMAND_LINE flag to determine whether we are still processing
25090 command-line macro definitions/undefinitions. This flag is unset when we
25091 reach the first DW_MACINFO_start_file entry. */
25093 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
25095 NULL
, xcalloc
, xfree
));
25096 mac_ptr
= section
->buffer
+ offset
;
25097 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
25098 *slot
= (void *) mac_ptr
;
25099 dwarf_decode_macro_bytes (cu
, abfd
, mac_ptr
, mac_end
,
25100 current_file
, lh
, section
,
25101 section_is_gnu
, 0, offset_size
,
25102 include_hash
.get ());
25105 /* Check if the attribute's form is a DW_FORM_block*
25106 if so return true else false. */
25109 attr_form_is_block (const struct attribute
*attr
)
25111 return (attr
== NULL
? 0 :
25112 attr
->form
== DW_FORM_block1
25113 || attr
->form
== DW_FORM_block2
25114 || attr
->form
== DW_FORM_block4
25115 || attr
->form
== DW_FORM_block
25116 || attr
->form
== DW_FORM_exprloc
);
25119 /* Return non-zero if ATTR's value is a section offset --- classes
25120 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
25121 You may use DW_UNSND (attr) to retrieve such offsets.
25123 Section 7.5.4, "Attribute Encodings", explains that no attribute
25124 may have a value that belongs to more than one of these classes; it
25125 would be ambiguous if we did, because we use the same forms for all
25129 attr_form_is_section_offset (const struct attribute
*attr
)
25131 return (attr
->form
== DW_FORM_data4
25132 || attr
->form
== DW_FORM_data8
25133 || attr
->form
== DW_FORM_sec_offset
);
25136 /* Return non-zero if ATTR's value falls in the 'constant' class, or
25137 zero otherwise. When this function returns true, you can apply
25138 dwarf2_get_attr_constant_value to it.
25140 However, note that for some attributes you must check
25141 attr_form_is_section_offset before using this test. DW_FORM_data4
25142 and DW_FORM_data8 are members of both the constant class, and of
25143 the classes that contain offsets into other debug sections
25144 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
25145 that, if an attribute's can be either a constant or one of the
25146 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
25147 taken as section offsets, not constants.
25149 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
25150 cannot handle that. */
25153 attr_form_is_constant (const struct attribute
*attr
)
25155 switch (attr
->form
)
25157 case DW_FORM_sdata
:
25158 case DW_FORM_udata
:
25159 case DW_FORM_data1
:
25160 case DW_FORM_data2
:
25161 case DW_FORM_data4
:
25162 case DW_FORM_data8
:
25163 case DW_FORM_implicit_const
:
25171 /* DW_ADDR is always stored already as sect_offset; despite for the forms
25172 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
25175 attr_form_is_ref (const struct attribute
*attr
)
25177 switch (attr
->form
)
25179 case DW_FORM_ref_addr
:
25184 case DW_FORM_ref_udata
:
25185 case DW_FORM_GNU_ref_alt
:
25192 /* Return the .debug_loc section to use for CU.
25193 For DWO files use .debug_loc.dwo. */
25195 static struct dwarf2_section_info
*
25196 cu_debug_loc_section (struct dwarf2_cu
*cu
)
25198 struct dwarf2_per_objfile
*dwarf2_per_objfile
25199 = cu
->per_cu
->dwarf2_per_objfile
;
25203 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
25205 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
25207 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
25208 : &dwarf2_per_objfile
->loc
);
25211 /* A helper function that fills in a dwarf2_loclist_baton. */
25214 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
25215 struct dwarf2_loclist_baton
*baton
,
25216 const struct attribute
*attr
)
25218 struct dwarf2_per_objfile
*dwarf2_per_objfile
25219 = cu
->per_cu
->dwarf2_per_objfile
;
25220 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
25222 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
25224 baton
->per_cu
= cu
->per_cu
;
25225 gdb_assert (baton
->per_cu
);
25226 /* We don't know how long the location list is, but make sure we
25227 don't run off the edge of the section. */
25228 baton
->size
= section
->size
- DW_UNSND (attr
);
25229 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
25230 baton
->base_address
= cu
->base_address
;
25231 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
25235 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
25236 struct dwarf2_cu
*cu
, int is_block
)
25238 struct dwarf2_per_objfile
*dwarf2_per_objfile
25239 = cu
->per_cu
->dwarf2_per_objfile
;
25240 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25241 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
25243 if (attr_form_is_section_offset (attr
)
25244 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
25245 the section. If so, fall through to the complaint in the
25247 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
25249 struct dwarf2_loclist_baton
*baton
;
25251 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
25253 fill_in_loclist_baton (cu
, baton
, attr
);
25255 if (cu
->base_known
== 0)
25256 complaint (_("Location list used without "
25257 "specifying the CU base address."));
25259 SYMBOL_ACLASS_INDEX (sym
) = (is_block
25260 ? dwarf2_loclist_block_index
25261 : dwarf2_loclist_index
);
25262 SYMBOL_LOCATION_BATON (sym
) = baton
;
25266 struct dwarf2_locexpr_baton
*baton
;
25268 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
25269 baton
->per_cu
= cu
->per_cu
;
25270 gdb_assert (baton
->per_cu
);
25272 if (attr_form_is_block (attr
))
25274 /* Note that we're just copying the block's data pointer
25275 here, not the actual data. We're still pointing into the
25276 info_buffer for SYM's objfile; right now we never release
25277 that buffer, but when we do clean up properly this may
25279 baton
->size
= DW_BLOCK (attr
)->size
;
25280 baton
->data
= DW_BLOCK (attr
)->data
;
25284 dwarf2_invalid_attrib_class_complaint ("location description",
25285 SYMBOL_NATURAL_NAME (sym
));
25289 SYMBOL_ACLASS_INDEX (sym
) = (is_block
25290 ? dwarf2_locexpr_block_index
25291 : dwarf2_locexpr_index
);
25292 SYMBOL_LOCATION_BATON (sym
) = baton
;
25296 /* Return the OBJFILE associated with the compilation unit CU. If CU
25297 came from a separate debuginfo file, then the master objfile is
25301 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
25303 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25305 /* Return the master objfile, so that we can report and look up the
25306 correct file containing this variable. */
25307 if (objfile
->separate_debug_objfile_backlink
)
25308 objfile
= objfile
->separate_debug_objfile_backlink
;
25313 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
25314 (CU_HEADERP is unused in such case) or prepare a temporary copy at
25315 CU_HEADERP first. */
25317 static const struct comp_unit_head
*
25318 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
25319 struct dwarf2_per_cu_data
*per_cu
)
25321 const gdb_byte
*info_ptr
;
25324 return &per_cu
->cu
->header
;
25326 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
25328 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
25329 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
25330 rcuh_kind::COMPILE
);
25335 /* Return the address size given in the compilation unit header for CU. */
25338 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
25340 struct comp_unit_head cu_header_local
;
25341 const struct comp_unit_head
*cu_headerp
;
25343 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25345 return cu_headerp
->addr_size
;
25348 /* Return the offset size given in the compilation unit header for CU. */
25351 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
25353 struct comp_unit_head cu_header_local
;
25354 const struct comp_unit_head
*cu_headerp
;
25356 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25358 return cu_headerp
->offset_size
;
25361 /* See its dwarf2loc.h declaration. */
25364 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
25366 struct comp_unit_head cu_header_local
;
25367 const struct comp_unit_head
*cu_headerp
;
25369 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25371 if (cu_headerp
->version
== 2)
25372 return cu_headerp
->addr_size
;
25374 return cu_headerp
->offset_size
;
25377 /* Return the text offset of the CU. The returned offset comes from
25378 this CU's objfile. If this objfile came from a separate debuginfo
25379 file, then the offset may be different from the corresponding
25380 offset in the parent objfile. */
25383 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
25385 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25387 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
25390 /* Return a type that is a generic pointer type, the size of which matches
25391 the address size given in the compilation unit header for PER_CU. */
25392 static struct type
*
25393 dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data
*per_cu
)
25395 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25396 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
25397 struct type
*addr_type
= lookup_pointer_type (void_type
);
25398 int addr_size
= dwarf2_per_cu_addr_size (per_cu
);
25400 if (TYPE_LENGTH (addr_type
) == addr_size
)
25404 = dwarf2_per_cu_addr_sized_int_type (per_cu
, TYPE_UNSIGNED (addr_type
));
25408 /* Return DWARF version number of PER_CU. */
25411 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
25413 return per_cu
->dwarf_version
;
25416 /* Locate the .debug_info compilation unit from CU's objfile which contains
25417 the DIE at OFFSET. Raises an error on failure. */
25419 static struct dwarf2_per_cu_data
*
25420 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
25421 unsigned int offset_in_dwz
,
25422 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25424 struct dwarf2_per_cu_data
*this_cu
;
25428 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
25431 struct dwarf2_per_cu_data
*mid_cu
;
25432 int mid
= low
+ (high
- low
) / 2;
25434 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
25435 if (mid_cu
->is_dwz
> offset_in_dwz
25436 || (mid_cu
->is_dwz
== offset_in_dwz
25437 && mid_cu
->sect_off
+ mid_cu
->length
>= sect_off
))
25442 gdb_assert (low
== high
);
25443 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25444 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
25446 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
25447 error (_("Dwarf Error: could not find partial DIE containing "
25448 "offset %s [in module %s]"),
25449 sect_offset_str (sect_off
),
25450 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
25452 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
25454 return dwarf2_per_objfile
->all_comp_units
[low
-1];
25458 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
25459 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
25460 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
25461 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
25466 /* Initialize dwarf2_cu CU, owned by PER_CU. */
25468 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
25469 : per_cu (per_cu_
),
25471 has_loclist (false),
25472 checked_producer (false),
25473 producer_is_gxx_lt_4_6 (false),
25474 producer_is_gcc_lt_4_3 (false),
25475 producer_is_icc (false),
25476 producer_is_icc_lt_14 (false),
25477 producer_is_codewarrior (false),
25478 processing_has_namespace_info (false)
25483 /* Destroy a dwarf2_cu. */
25485 dwarf2_cu::~dwarf2_cu ()
25490 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
25493 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
25494 enum language pretend_language
)
25496 struct attribute
*attr
;
25498 /* Set the language we're debugging. */
25499 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
25501 set_cu_language (DW_UNSND (attr
), cu
);
25504 cu
->language
= pretend_language
;
25505 cu
->language_defn
= language_def (cu
->language
);
25508 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25511 /* Increase the age counter on each cached compilation unit, and free
25512 any that are too old. */
25515 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25517 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25519 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25520 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25521 while (per_cu
!= NULL
)
25523 per_cu
->cu
->last_used
++;
25524 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25525 dwarf2_mark (per_cu
->cu
);
25526 per_cu
= per_cu
->cu
->read_in_chain
;
25529 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25530 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25531 while (per_cu
!= NULL
)
25533 struct dwarf2_per_cu_data
*next_cu
;
25535 next_cu
= per_cu
->cu
->read_in_chain
;
25537 if (!per_cu
->cu
->mark
)
25540 *last_chain
= next_cu
;
25543 last_chain
= &per_cu
->cu
->read_in_chain
;
25549 /* Remove a single compilation unit from the cache. */
25552 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25554 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25555 struct dwarf2_per_objfile
*dwarf2_per_objfile
25556 = target_per_cu
->dwarf2_per_objfile
;
25558 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25559 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25560 while (per_cu
!= NULL
)
25562 struct dwarf2_per_cu_data
*next_cu
;
25564 next_cu
= per_cu
->cu
->read_in_chain
;
25566 if (per_cu
== target_per_cu
)
25570 *last_chain
= next_cu
;
25574 last_chain
= &per_cu
->cu
->read_in_chain
;
25580 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25581 We store these in a hash table separate from the DIEs, and preserve them
25582 when the DIEs are flushed out of cache.
25584 The CU "per_cu" pointer is needed because offset alone is not enough to
25585 uniquely identify the type. A file may have multiple .debug_types sections,
25586 or the type may come from a DWO file. Furthermore, while it's more logical
25587 to use per_cu->section+offset, with Fission the section with the data is in
25588 the DWO file but we don't know that section at the point we need it.
25589 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25590 because we can enter the lookup routine, get_die_type_at_offset, from
25591 outside this file, and thus won't necessarily have PER_CU->cu.
25592 Fortunately, PER_CU is stable for the life of the objfile. */
25594 struct dwarf2_per_cu_offset_and_type
25596 const struct dwarf2_per_cu_data
*per_cu
;
25597 sect_offset sect_off
;
25601 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25604 per_cu_offset_and_type_hash (const void *item
)
25606 const struct dwarf2_per_cu_offset_and_type
*ofs
25607 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25609 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25612 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25615 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25617 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25618 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25619 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25620 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25622 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25623 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25626 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25627 table if necessary. For convenience, return TYPE.
25629 The DIEs reading must have careful ordering to:
25630 * Not cause infite loops trying to read in DIEs as a prerequisite for
25631 reading current DIE.
25632 * Not trying to dereference contents of still incompletely read in types
25633 while reading in other DIEs.
25634 * Enable referencing still incompletely read in types just by a pointer to
25635 the type without accessing its fields.
25637 Therefore caller should follow these rules:
25638 * Try to fetch any prerequisite types we may need to build this DIE type
25639 before building the type and calling set_die_type.
25640 * After building type call set_die_type for current DIE as soon as
25641 possible before fetching more types to complete the current type.
25642 * Make the type as complete as possible before fetching more types. */
25644 static struct type
*
25645 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25647 struct dwarf2_per_objfile
*dwarf2_per_objfile
25648 = cu
->per_cu
->dwarf2_per_objfile
;
25649 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25650 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25651 struct attribute
*attr
;
25652 struct dynamic_prop prop
;
25654 /* For Ada types, make sure that the gnat-specific data is always
25655 initialized (if not already set). There are a few types where
25656 we should not be doing so, because the type-specific area is
25657 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25658 where the type-specific area is used to store the floatformat).
25659 But this is not a problem, because the gnat-specific information
25660 is actually not needed for these types. */
25661 if (need_gnat_info (cu
)
25662 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25663 && TYPE_CODE (type
) != TYPE_CODE_FLT
25664 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25665 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25666 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25667 && !HAVE_GNAT_AUX_INFO (type
))
25668 INIT_GNAT_SPECIFIC (type
);
25670 /* Read DW_AT_allocated and set in type. */
25671 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25672 if (attr_form_is_block (attr
))
25674 struct type
*prop_type
25675 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
25676 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25677 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25679 else if (attr
!= NULL
)
25681 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25682 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25683 sect_offset_str (die
->sect_off
));
25686 /* Read DW_AT_associated and set in type. */
25687 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25688 if (attr_form_is_block (attr
))
25690 struct type
*prop_type
25691 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
25692 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25693 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25695 else if (attr
!= NULL
)
25697 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
25698 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25699 sect_offset_str (die
->sect_off
));
25702 /* Read DW_AT_data_location and set in type. */
25703 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25704 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
25705 dwarf2_per_cu_addr_type (cu
->per_cu
)))
25706 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25708 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25710 dwarf2_per_objfile
->die_type_hash
=
25711 htab_create_alloc_ex (127,
25712 per_cu_offset_and_type_hash
,
25713 per_cu_offset_and_type_eq
,
25715 &objfile
->objfile_obstack
,
25716 hashtab_obstack_allocate
,
25717 dummy_obstack_deallocate
);
25720 ofs
.per_cu
= cu
->per_cu
;
25721 ofs
.sect_off
= die
->sect_off
;
25723 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25724 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25726 complaint (_("A problem internal to GDB: DIE %s has type already set"),
25727 sect_offset_str (die
->sect_off
));
25728 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25729 struct dwarf2_per_cu_offset_and_type
);
25734 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25735 or return NULL if the die does not have a saved type. */
25737 static struct type
*
25738 get_die_type_at_offset (sect_offset sect_off
,
25739 struct dwarf2_per_cu_data
*per_cu
)
25741 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25742 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25744 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25747 ofs
.per_cu
= per_cu
;
25748 ofs
.sect_off
= sect_off
;
25749 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25750 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25757 /* Look up the type for DIE in CU in die_type_hash,
25758 or return NULL if DIE does not have a saved type. */
25760 static struct type
*
25761 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25763 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25766 /* Add a dependence relationship from CU to REF_PER_CU. */
25769 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25770 struct dwarf2_per_cu_data
*ref_per_cu
)
25774 if (cu
->dependencies
== NULL
)
25776 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25777 NULL
, &cu
->comp_unit_obstack
,
25778 hashtab_obstack_allocate
,
25779 dummy_obstack_deallocate
);
25781 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25783 *slot
= ref_per_cu
;
25786 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25787 Set the mark field in every compilation unit in the
25788 cache that we must keep because we are keeping CU. */
25791 dwarf2_mark_helper (void **slot
, void *data
)
25793 struct dwarf2_per_cu_data
*per_cu
;
25795 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25797 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25798 reading of the chain. As such dependencies remain valid it is not much
25799 useful to track and undo them during QUIT cleanups. */
25800 if (per_cu
->cu
== NULL
)
25803 if (per_cu
->cu
->mark
)
25805 per_cu
->cu
->mark
= true;
25807 if (per_cu
->cu
->dependencies
!= NULL
)
25808 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25813 /* Set the mark field in CU and in every other compilation unit in the
25814 cache that we must keep because we are keeping CU. */
25817 dwarf2_mark (struct dwarf2_cu
*cu
)
25822 if (cu
->dependencies
!= NULL
)
25823 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25827 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25831 per_cu
->cu
->mark
= false;
25832 per_cu
= per_cu
->cu
->read_in_chain
;
25836 /* Trivial hash function for partial_die_info: the hash value of a DIE
25837 is its offset in .debug_info for this objfile. */
25840 partial_die_hash (const void *item
)
25842 const struct partial_die_info
*part_die
25843 = (const struct partial_die_info
*) item
;
25845 return to_underlying (part_die
->sect_off
);
25848 /* Trivial comparison function for partial_die_info structures: two DIEs
25849 are equal if they have the same offset. */
25852 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25854 const struct partial_die_info
*part_die_lhs
25855 = (const struct partial_die_info
*) item_lhs
;
25856 const struct partial_die_info
*part_die_rhs
25857 = (const struct partial_die_info
*) item_rhs
;
25859 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25862 struct cmd_list_element
*set_dwarf_cmdlist
;
25863 struct cmd_list_element
*show_dwarf_cmdlist
;
25866 set_dwarf_cmd (const char *args
, int from_tty
)
25868 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25873 show_dwarf_cmd (const char *args
, int from_tty
)
25875 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25878 bool dwarf_always_disassemble
;
25881 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25882 struct cmd_list_element
*c
, const char *value
)
25884 fprintf_filtered (file
,
25885 _("Whether to always disassemble "
25886 "DWARF expressions is %s.\n"),
25891 show_check_physname (struct ui_file
*file
, int from_tty
,
25892 struct cmd_list_element
*c
, const char *value
)
25894 fprintf_filtered (file
,
25895 _("Whether to check \"physname\" is %s.\n"),
25900 _initialize_dwarf2_read (void)
25902 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25903 Set DWARF specific variables.\n\
25904 Configure DWARF variables such as the cache size."),
25905 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25906 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25908 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25909 Show DWARF specific variables.\n\
25910 Show DWARF variables such as the cache size."),
25911 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25912 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25914 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25915 &dwarf_max_cache_age
, _("\
25916 Set the upper bound on the age of cached DWARF compilation units."), _("\
25917 Show the upper bound on the age of cached DWARF compilation units."), _("\
25918 A higher limit means that cached compilation units will be stored\n\
25919 in memory longer, and more total memory will be used. Zero disables\n\
25920 caching, which can slow down startup."),
25922 show_dwarf_max_cache_age
,
25923 &set_dwarf_cmdlist
,
25924 &show_dwarf_cmdlist
);
25926 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25927 &dwarf_always_disassemble
, _("\
25928 Set whether `info address' always disassembles DWARF expressions."), _("\
25929 Show whether `info address' always disassembles DWARF expressions."), _("\
25930 When enabled, DWARF expressions are always printed in an assembly-like\n\
25931 syntax. When disabled, expressions will be printed in a more\n\
25932 conversational style, when possible."),
25934 show_dwarf_always_disassemble
,
25935 &set_dwarf_cmdlist
,
25936 &show_dwarf_cmdlist
);
25938 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25939 Set debugging of the DWARF reader."), _("\
25940 Show debugging of the DWARF reader."), _("\
25941 When enabled (non-zero), debugging messages are printed during DWARF\n\
25942 reading and symtab expansion. A value of 1 (one) provides basic\n\
25943 information. A value greater than 1 provides more verbose information."),
25946 &setdebuglist
, &showdebuglist
);
25948 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25949 Set debugging of the DWARF DIE reader."), _("\
25950 Show debugging of the DWARF DIE reader."), _("\
25951 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25952 The value is the maximum depth to print."),
25955 &setdebuglist
, &showdebuglist
);
25957 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25958 Set debugging of the dwarf line reader."), _("\
25959 Show debugging of the dwarf line reader."), _("\
25960 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25961 A value of 1 (one) provides basic information.\n\
25962 A value greater than 1 provides more verbose information."),
25965 &setdebuglist
, &showdebuglist
);
25967 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25968 Set cross-checking of \"physname\" code against demangler."), _("\
25969 Show cross-checking of \"physname\" code against demangler."), _("\
25970 When enabled, GDB's internal \"physname\" code is checked against\n\
25972 NULL
, show_check_physname
,
25973 &setdebuglist
, &showdebuglist
);
25975 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25976 no_class
, &use_deprecated_index_sections
, _("\
25977 Set whether to use deprecated gdb_index sections."), _("\
25978 Show whether to use deprecated gdb_index sections."), _("\
25979 When enabled, deprecated .gdb_index sections are used anyway.\n\
25980 Normally they are ignored either because of a missing feature or\n\
25981 performance issue.\n\
25982 Warning: This option must be enabled before gdb reads the file."),
25985 &setlist
, &showlist
);
25987 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25988 &dwarf2_locexpr_funcs
);
25989 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25990 &dwarf2_loclist_funcs
);
25992 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25993 &dwarf2_block_frame_base_locexpr_funcs
);
25994 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25995 &dwarf2_block_frame_base_loclist_funcs
);
25998 selftests::register_test ("dw2_expand_symtabs_matching",
25999 selftests::dw2_expand_symtabs_matching::run_test
);