1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2020 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 "dwarf2/read.h"
33 #include "dwarf2/abbrev.h"
34 #include "dwarf2/attribute.h"
35 #include "dwarf2/comp-unit.h"
36 #include "dwarf2/index-cache.h"
37 #include "dwarf2/index-common.h"
38 #include "dwarf2/leb.h"
39 #include "dwarf2/line-header.h"
40 #include "dwarf2/dwz.h"
41 #include "dwarf2/macro.h"
42 #include "dwarf2/die.h"
43 #include "dwarf2/stringify.h"
52 #include "gdb-demangle.h"
53 #include "filenames.h" /* for DOSish file names */
55 #include "complaints.h"
56 #include "dwarf2/expr.h"
57 #include "dwarf2/loc.h"
58 #include "cp-support.h"
64 #include "typeprint.h"
69 #include "gdbcore.h" /* for gnutarget */
70 #include "gdb/gdb-index.h"
75 #include "namespace.h"
76 #include "gdbsupport/function-view.h"
77 #include "gdbsupport/gdb_optional.h"
78 #include "gdbsupport/underlying.h"
79 #include "gdbsupport/hash_enum.h"
80 #include "filename-seen-cache.h"
84 #include <unordered_map>
85 #include "gdbsupport/selftest.h"
86 #include "rust-lang.h"
87 #include "gdbsupport/pathstuff.h"
88 #include "count-one-bits.h"
89 #include "debuginfod-support.h"
91 /* When == 1, print basic high level tracing messages.
92 When > 1, be more verbose.
93 This is in contrast to the low level DIE reading of dwarf_die_debug. */
94 static unsigned int dwarf_read_debug
= 0;
96 /* When non-zero, dump DIEs after they are read in. */
97 static unsigned int dwarf_die_debug
= 0;
99 /* When non-zero, dump line number entries as they are read in. */
100 unsigned int dwarf_line_debug
= 0;
102 /* When true, cross-check physname against demangler. */
103 static bool check_physname
= false;
105 /* When true, do not reject deprecated .gdb_index sections. */
106 static bool use_deprecated_index_sections
= false;
108 static const struct objfile_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
110 /* The "aclass" indices for various kinds of computed DWARF symbols. */
112 static int dwarf2_locexpr_index
;
113 static int dwarf2_loclist_index
;
114 static int dwarf2_locexpr_block_index
;
115 static int dwarf2_loclist_block_index
;
117 /* Size of .debug_loclists section header for 32-bit DWARF format. */
118 #define LOCLIST_HEADER_SIZE32 12
120 /* Size of .debug_loclists section header for 64-bit DWARF format. */
121 #define LOCLIST_HEADER_SIZE64 20
123 /* An index into a (C++) symbol name component in a symbol name as
124 recorded in the mapped_index's symbol table. For each C++ symbol
125 in the symbol table, we record one entry for the start of each
126 component in the symbol in a table of name components, and then
127 sort the table, in order to be able to binary search symbol names,
128 ignoring leading namespaces, both completion and regular look up.
129 For example, for symbol "A::B::C", we'll have an entry that points
130 to "A::B::C", another that points to "B::C", and another for "C".
131 Note that function symbols in GDB index have no parameter
132 information, just the function/method names. You can convert a
133 name_component to a "const char *" using the
134 'mapped_index::symbol_name_at(offset_type)' method. */
136 struct name_component
138 /* Offset in the symbol name where the component starts. Stored as
139 a (32-bit) offset instead of a pointer to save memory and improve
140 locality on 64-bit architectures. */
141 offset_type name_offset
;
143 /* The symbol's index in the symbol and constant pool tables of a
148 /* Base class containing bits shared by both .gdb_index and
149 .debug_name indexes. */
151 struct mapped_index_base
153 mapped_index_base () = default;
154 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
156 /* The name_component table (a sorted vector). See name_component's
157 description above. */
158 std::vector
<name_component
> name_components
;
160 /* How NAME_COMPONENTS is sorted. */
161 enum case_sensitivity name_components_casing
;
163 /* Return the number of names in the symbol table. */
164 virtual size_t symbol_name_count () const = 0;
166 /* Get the name of the symbol at IDX in the symbol table. */
167 virtual const char *symbol_name_at (offset_type idx
) const = 0;
169 /* Return whether the name at IDX in the symbol table should be
171 virtual bool symbol_name_slot_invalid (offset_type idx
) const
176 /* Build the symbol name component sorted vector, if we haven't
178 void build_name_components ();
180 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
181 possible matches for LN_NO_PARAMS in the name component
183 std::pair
<std::vector
<name_component
>::const_iterator
,
184 std::vector
<name_component
>::const_iterator
>
185 find_name_components_bounds (const lookup_name_info
&ln_no_params
,
186 enum language lang
) const;
188 /* Prevent deleting/destroying via a base class pointer. */
190 ~mapped_index_base() = default;
193 /* A description of the mapped index. The file format is described in
194 a comment by the code that writes the index. */
195 struct mapped_index final
: public mapped_index_base
197 /* A slot/bucket in the symbol table hash. */
198 struct symbol_table_slot
200 const offset_type name
;
201 const offset_type vec
;
204 /* Index data format version. */
207 /* The address table data. */
208 gdb::array_view
<const gdb_byte
> address_table
;
210 /* The symbol table, implemented as a hash table. */
211 gdb::array_view
<symbol_table_slot
> symbol_table
;
213 /* A pointer to the constant pool. */
214 const char *constant_pool
= nullptr;
216 bool symbol_name_slot_invalid (offset_type idx
) const override
218 const auto &bucket
= this->symbol_table
[idx
];
219 return bucket
.name
== 0 && bucket
.vec
== 0;
222 /* Convenience method to get at the name of the symbol at IDX in the
224 const char *symbol_name_at (offset_type idx
) const override
225 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
227 size_t symbol_name_count () const override
228 { return this->symbol_table
.size (); }
231 /* A description of the mapped .debug_names.
232 Uninitialized map has CU_COUNT 0. */
233 struct mapped_debug_names final
: public mapped_index_base
235 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
236 : dwarf2_per_objfile (dwarf2_per_objfile_
)
239 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
240 bfd_endian dwarf5_byte_order
;
241 bool dwarf5_is_dwarf64
;
242 bool augmentation_is_gdb
;
244 uint32_t cu_count
= 0;
245 uint32_t tu_count
, bucket_count
, name_count
;
246 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
247 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
248 const gdb_byte
*name_table_string_offs_reordered
;
249 const gdb_byte
*name_table_entry_offs_reordered
;
250 const gdb_byte
*entry_pool
;
257 /* Attribute name DW_IDX_*. */
260 /* Attribute form DW_FORM_*. */
263 /* Value if FORM is DW_FORM_implicit_const. */
264 LONGEST implicit_const
;
266 std::vector
<attr
> attr_vec
;
269 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
271 const char *namei_to_name (uint32_t namei
) const;
273 /* Implementation of the mapped_index_base virtual interface, for
274 the name_components cache. */
276 const char *symbol_name_at (offset_type idx
) const override
277 { return namei_to_name (idx
); }
279 size_t symbol_name_count () const override
280 { return this->name_count
; }
283 /* See dwarf2read.h. */
286 get_dwarf2_per_objfile (struct objfile
*objfile
)
288 return dwarf2_objfile_data_key
.get (objfile
);
291 /* Default names of the debugging sections. */
293 /* Note that if the debugging section has been compressed, it might
294 have a name like .zdebug_info. */
296 static const struct dwarf2_debug_sections dwarf2_elf_names
=
298 { ".debug_info", ".zdebug_info" },
299 { ".debug_abbrev", ".zdebug_abbrev" },
300 { ".debug_line", ".zdebug_line" },
301 { ".debug_loc", ".zdebug_loc" },
302 { ".debug_loclists", ".zdebug_loclists" },
303 { ".debug_macinfo", ".zdebug_macinfo" },
304 { ".debug_macro", ".zdebug_macro" },
305 { ".debug_str", ".zdebug_str" },
306 { ".debug_str_offsets", ".zdebug_str_offsets" },
307 { ".debug_line_str", ".zdebug_line_str" },
308 { ".debug_ranges", ".zdebug_ranges" },
309 { ".debug_rnglists", ".zdebug_rnglists" },
310 { ".debug_types", ".zdebug_types" },
311 { ".debug_addr", ".zdebug_addr" },
312 { ".debug_frame", ".zdebug_frame" },
313 { ".eh_frame", NULL
},
314 { ".gdb_index", ".zgdb_index" },
315 { ".debug_names", ".zdebug_names" },
316 { ".debug_aranges", ".zdebug_aranges" },
320 /* List of DWO/DWP sections. */
322 static const struct dwop_section_names
324 struct dwarf2_section_names abbrev_dwo
;
325 struct dwarf2_section_names info_dwo
;
326 struct dwarf2_section_names line_dwo
;
327 struct dwarf2_section_names loc_dwo
;
328 struct dwarf2_section_names loclists_dwo
;
329 struct dwarf2_section_names macinfo_dwo
;
330 struct dwarf2_section_names macro_dwo
;
331 struct dwarf2_section_names str_dwo
;
332 struct dwarf2_section_names str_offsets_dwo
;
333 struct dwarf2_section_names types_dwo
;
334 struct dwarf2_section_names cu_index
;
335 struct dwarf2_section_names tu_index
;
339 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
340 { ".debug_info.dwo", ".zdebug_info.dwo" },
341 { ".debug_line.dwo", ".zdebug_line.dwo" },
342 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
343 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
344 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
345 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
346 { ".debug_str.dwo", ".zdebug_str.dwo" },
347 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
348 { ".debug_types.dwo", ".zdebug_types.dwo" },
349 { ".debug_cu_index", ".zdebug_cu_index" },
350 { ".debug_tu_index", ".zdebug_tu_index" },
353 /* local data types */
355 /* The location list section (.debug_loclists) begins with a header,
356 which contains the following information. */
357 struct loclist_header
359 /* A 4-byte or 12-byte length containing the length of the
360 set of entries for this compilation unit, not including the
361 length field itself. */
364 /* A 2-byte version identifier. */
367 /* A 1-byte unsigned integer containing the size in bytes of an address on
368 the target system. */
369 unsigned char addr_size
;
371 /* A 1-byte unsigned integer containing the size in bytes of a segment selector
372 on the target system. */
373 unsigned char segment_collector_size
;
375 /* A 4-byte count of the number of offsets that follow the header. */
376 unsigned int offset_entry_count
;
379 /* Type used for delaying computation of method physnames.
380 See comments for compute_delayed_physnames. */
381 struct delayed_method_info
383 /* The type to which the method is attached, i.e., its parent class. */
386 /* The index of the method in the type's function fieldlists. */
389 /* The index of the method in the fieldlist. */
392 /* The name of the DIE. */
395 /* The DIE associated with this method. */
396 struct die_info
*die
;
399 /* Internal state when decoding a particular compilation unit. */
402 explicit dwarf2_cu (struct dwarf2_per_cu_data
*per_cu
);
405 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
407 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
408 Create the set of symtabs used by this TU, or if this TU is sharing
409 symtabs with another TU and the symtabs have already been created
410 then restore those symtabs in the line header.
411 We don't need the pc/line-number mapping for type units. */
412 void setup_type_unit_groups (struct die_info
*die
);
414 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
415 buildsym_compunit constructor. */
416 struct compunit_symtab
*start_symtab (const char *name
,
417 const char *comp_dir
,
420 /* Reset the builder. */
421 void reset_builder () { m_builder
.reset (); }
423 /* The header of the compilation unit. */
424 struct comp_unit_head header
{};
426 /* Base address of this compilation unit. */
427 gdb::optional
<CORE_ADDR
> base_address
;
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_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 (DW_AT_GNU_addr_base) attribute if present.
512 Note this value comes from the Fission stub CU/TU's DIE. */
513 gdb::optional
<ULONGEST
> addr_base
;
515 /* The DW_AT_rnglists_base attribute if present.
516 Note this value comes from the Fission stub CU/TU's DIE.
517 Also note that the value is zero in the non-DWO case so this value can
518 be used without needing to know whether DWO files are in use or not.
519 N.B. This does not apply to DW_AT_ranges appearing in
520 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
521 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
522 DW_AT_rnglists_base *would* have to be applied, and we'd have to care
523 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
524 ULONGEST ranges_base
= 0;
526 /* The DW_AT_loclists_base attribute if present. */
527 ULONGEST loclist_base
= 0;
529 /* When reading debug info generated by older versions of rustc, we
530 have to rewrite some union types to be struct types with a
531 variant part. This rewriting must be done after the CU is fully
532 read in, because otherwise at the point of rewriting some struct
533 type might not have been fully processed. So, we keep a list of
534 all such types here and process them after expansion. */
535 std::vector
<struct type
*> rust_unions
;
537 /* The DW_AT_str_offsets_base attribute if present. For DWARF 4 version DWO
538 files, the value is implicitly zero. For DWARF 5 version DWO files, the
539 value is often implicit and is the size of the header of
540 .debug_str_offsets section (8 or 4, depending on the address size). */
541 gdb::optional
<ULONGEST
> str_offsets_base
;
543 /* Mark used when releasing cached dies. */
546 /* This CU references .debug_loc. See the symtab->locations_valid field.
547 This test is imperfect as there may exist optimized debug code not using
548 any location list and still facing inlining issues if handled as
549 unoptimized code. For a future better test see GCC PR other/32998. */
550 bool has_loclist
: 1;
552 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
553 if all the producer_is_* fields are valid. This information is cached
554 because profiling CU expansion showed excessive time spent in
555 producer_is_gxx_lt_4_6. */
556 bool checked_producer
: 1;
557 bool producer_is_gxx_lt_4_6
: 1;
558 bool producer_is_gcc_lt_4_3
: 1;
559 bool producer_is_icc
: 1;
560 bool producer_is_icc_lt_14
: 1;
561 bool producer_is_codewarrior
: 1;
563 /* When true, the file that we're processing is known to have
564 debugging info for C++ namespaces. GCC 3.3.x did not produce
565 this information, but later versions do. */
567 bool processing_has_namespace_info
: 1;
569 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
571 /* If this CU was inherited by another CU (via specification,
572 abstract_origin, etc), this is the ancestor CU. */
575 /* Get the buildsym_compunit for this CU. */
576 buildsym_compunit
*get_builder ()
578 /* If this CU has a builder associated with it, use that. */
579 if (m_builder
!= nullptr)
580 return m_builder
.get ();
582 /* Otherwise, search ancestors for a valid builder. */
583 if (ancestor
!= nullptr)
584 return ancestor
->get_builder ();
590 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
591 This includes type_unit_group and quick_file_names. */
593 struct stmt_list_hash
595 /* The DWO unit this table is from or NULL if there is none. */
596 struct dwo_unit
*dwo_unit
;
598 /* Offset in .debug_line or .debug_line.dwo. */
599 sect_offset line_sect_off
;
602 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
603 an object of this type. */
605 struct type_unit_group
607 /* dwarf2read.c's main "handle" on a TU symtab.
608 To simplify things we create an artificial CU that "includes" all the
609 type units using this stmt_list so that the rest of the code still has
610 a "per_cu" handle on the symtab. */
611 struct dwarf2_per_cu_data per_cu
;
613 /* The TUs that share this DW_AT_stmt_list entry.
614 This is added to while parsing type units to build partial symtabs,
615 and is deleted afterwards and not used again. */
616 std::vector
<signatured_type
*> *tus
;
618 /* The compunit symtab.
619 Type units in a group needn't all be defined in the same source file,
620 so we create an essentially anonymous symtab as the compunit symtab. */
621 struct compunit_symtab
*compunit_symtab
;
623 /* The data used to construct the hash key. */
624 struct stmt_list_hash hash
;
626 /* The symbol tables for this TU (obtained from the files listed in
628 WARNING: The order of entries here must match the order of entries
629 in the line header. After the first TU using this type_unit_group, the
630 line header for the subsequent TUs is recreated from this. This is done
631 because we need to use the same symtabs for each TU using the same
632 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
633 there's no guarantee the line header doesn't have duplicate entries. */
634 struct symtab
**symtabs
;
637 /* These sections are what may appear in a (real or virtual) DWO file. */
641 struct dwarf2_section_info abbrev
;
642 struct dwarf2_section_info line
;
643 struct dwarf2_section_info loc
;
644 struct dwarf2_section_info loclists
;
645 struct dwarf2_section_info macinfo
;
646 struct dwarf2_section_info macro
;
647 struct dwarf2_section_info str
;
648 struct dwarf2_section_info str_offsets
;
649 /* In the case of a virtual DWO file, these two are unused. */
650 struct dwarf2_section_info info
;
651 std::vector
<dwarf2_section_info
> types
;
654 /* CUs/TUs in DWP/DWO files. */
658 /* Backlink to the containing struct dwo_file. */
659 struct dwo_file
*dwo_file
;
661 /* The "id" that distinguishes this CU/TU.
662 .debug_info calls this "dwo_id", .debug_types calls this "signature".
663 Since signatures came first, we stick with it for consistency. */
666 /* The section this CU/TU lives in, in the DWO file. */
667 struct dwarf2_section_info
*section
;
669 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
670 sect_offset sect_off
;
673 /* For types, offset in the type's DIE of the type defined by this TU. */
674 cu_offset type_offset_in_tu
;
677 /* include/dwarf2.h defines the DWP section codes.
678 It defines a max value but it doesn't define a min value, which we
679 use for error checking, so provide one. */
681 enum dwp_v2_section_ids
686 /* Data for one DWO file.
688 This includes virtual DWO files (a virtual DWO file is a DWO file as it
689 appears in a DWP file). DWP files don't really have DWO files per se -
690 comdat folding of types "loses" the DWO file they came from, and from
691 a high level view DWP files appear to contain a mass of random types.
692 However, to maintain consistency with the non-DWP case we pretend DWP
693 files contain virtual DWO files, and we assign each TU with one virtual
694 DWO file (generally based on the line and abbrev section offsets -
695 a heuristic that seems to work in practice). */
699 dwo_file () = default;
700 DISABLE_COPY_AND_ASSIGN (dwo_file
);
702 /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute.
703 For virtual DWO files the name is constructed from the section offsets
704 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
705 from related CU+TUs. */
706 const char *dwo_name
= nullptr;
708 /* The DW_AT_comp_dir attribute. */
709 const char *comp_dir
= nullptr;
711 /* The bfd, when the file is open. Otherwise this is NULL.
712 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
713 gdb_bfd_ref_ptr dbfd
;
715 /* The sections that make up this DWO file.
716 Remember that for virtual DWO files in DWP V2, these are virtual
717 sections (for lack of a better name). */
718 struct dwo_sections sections
{};
720 /* The CUs in the file.
721 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
722 an extension to handle LLVM's Link Time Optimization output (where
723 multiple source files may be compiled into a single object/dwo pair). */
726 /* Table of TUs in the file.
727 Each element is a struct dwo_unit. */
731 /* These sections are what may appear in a DWP file. */
735 /* These are used by both DWP version 1 and 2. */
736 struct dwarf2_section_info str
;
737 struct dwarf2_section_info cu_index
;
738 struct dwarf2_section_info tu_index
;
740 /* These are only used by DWP version 2 files.
741 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
742 sections are referenced by section number, and are not recorded here.
743 In DWP version 2 there is at most one copy of all these sections, each
744 section being (effectively) comprised of the concatenation of all of the
745 individual sections that exist in the version 1 format.
746 To keep the code simple we treat each of these concatenated pieces as a
747 section itself (a virtual section?). */
748 struct dwarf2_section_info abbrev
;
749 struct dwarf2_section_info info
;
750 struct dwarf2_section_info line
;
751 struct dwarf2_section_info loc
;
752 struct dwarf2_section_info macinfo
;
753 struct dwarf2_section_info macro
;
754 struct dwarf2_section_info str_offsets
;
755 struct dwarf2_section_info types
;
758 /* These sections are what may appear in a virtual DWO file in DWP version 1.
759 A virtual DWO file is a DWO file as it appears in a DWP file. */
761 struct virtual_v1_dwo_sections
763 struct dwarf2_section_info abbrev
;
764 struct dwarf2_section_info line
;
765 struct dwarf2_section_info loc
;
766 struct dwarf2_section_info macinfo
;
767 struct dwarf2_section_info macro
;
768 struct dwarf2_section_info str_offsets
;
769 /* Each DWP hash table entry records one CU or one TU.
770 That is recorded here, and copied to dwo_unit.section. */
771 struct dwarf2_section_info info_or_types
;
774 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
775 In version 2, the sections of the DWO files are concatenated together
776 and stored in one section of that name. Thus each ELF section contains
777 several "virtual" sections. */
779 struct virtual_v2_dwo_sections
781 bfd_size_type abbrev_offset
;
782 bfd_size_type abbrev_size
;
784 bfd_size_type line_offset
;
785 bfd_size_type line_size
;
787 bfd_size_type loc_offset
;
788 bfd_size_type loc_size
;
790 bfd_size_type macinfo_offset
;
791 bfd_size_type macinfo_size
;
793 bfd_size_type macro_offset
;
794 bfd_size_type macro_size
;
796 bfd_size_type str_offsets_offset
;
797 bfd_size_type str_offsets_size
;
799 /* Each DWP hash table entry records one CU or one TU.
800 That is recorded here, and copied to dwo_unit.section. */
801 bfd_size_type info_or_types_offset
;
802 bfd_size_type info_or_types_size
;
805 /* Contents of DWP hash tables. */
807 struct dwp_hash_table
809 uint32_t version
, nr_columns
;
810 uint32_t nr_units
, nr_slots
;
811 const gdb_byte
*hash_table
, *unit_table
;
816 const gdb_byte
*indices
;
820 /* This is indexed by column number and gives the id of the section
822 #define MAX_NR_V2_DWO_SECTIONS \
823 (1 /* .debug_info or .debug_types */ \
824 + 1 /* .debug_abbrev */ \
825 + 1 /* .debug_line */ \
826 + 1 /* .debug_loc */ \
827 + 1 /* .debug_str_offsets */ \
828 + 1 /* .debug_macro or .debug_macinfo */)
829 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
830 const gdb_byte
*offsets
;
831 const gdb_byte
*sizes
;
836 /* Data for one DWP file. */
840 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
842 dbfd (std::move (abfd
))
846 /* Name of the file. */
849 /* File format version. */
853 gdb_bfd_ref_ptr dbfd
;
855 /* Section info for this file. */
856 struct dwp_sections sections
{};
858 /* Table of CUs in the file. */
859 const struct dwp_hash_table
*cus
= nullptr;
861 /* Table of TUs in the file. */
862 const struct dwp_hash_table
*tus
= nullptr;
864 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
868 /* Table to map ELF section numbers to their sections.
869 This is only needed for the DWP V1 file format. */
870 unsigned int num_sections
= 0;
871 asection
**elf_sections
= nullptr;
874 /* Struct used to pass misc. parameters to read_die_and_children, et
875 al. which are used for both .debug_info and .debug_types dies.
876 All parameters here are unchanging for the life of the call. This
877 struct exists to abstract away the constant parameters of die reading. */
879 struct die_reader_specs
881 /* The bfd of die_section. */
884 /* The CU of the DIE we are parsing. */
885 struct dwarf2_cu
*cu
;
887 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
888 struct dwo_file
*dwo_file
;
890 /* The section the die comes from.
891 This is either .debug_info or .debug_types, or the .dwo variants. */
892 struct dwarf2_section_info
*die_section
;
894 /* die_section->buffer. */
895 const gdb_byte
*buffer
;
897 /* The end of the buffer. */
898 const gdb_byte
*buffer_end
;
900 /* The abbreviation table to use when reading the DIEs. */
901 struct abbrev_table
*abbrev_table
;
904 /* A subclass of die_reader_specs that holds storage and has complex
905 constructor and destructor behavior. */
907 class cutu_reader
: public die_reader_specs
911 cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
912 struct abbrev_table
*abbrev_table
,
916 explicit cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
917 struct dwarf2_cu
*parent_cu
= nullptr,
918 struct dwo_file
*dwo_file
= nullptr);
920 DISABLE_COPY_AND_ASSIGN (cutu_reader
);
922 const gdb_byte
*info_ptr
= nullptr;
923 struct die_info
*comp_unit_die
= nullptr;
924 bool dummy_p
= false;
926 /* Release the new CU, putting it on the chain. This cannot be done
931 void init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
932 int use_existing_cu
);
934 struct dwarf2_per_cu_data
*m_this_cu
;
935 std::unique_ptr
<dwarf2_cu
> m_new_cu
;
937 /* The ordinary abbreviation table. */
938 abbrev_table_up m_abbrev_table_holder
;
940 /* The DWO abbreviation table. */
941 abbrev_table_up m_dwo_abbrev_table
;
944 /* When we construct a partial symbol table entry we only
945 need this much information. */
946 struct partial_die_info
: public allocate_on_obstack
948 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
950 /* Disable assign but still keep copy ctor, which is needed
951 load_partial_dies. */
952 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
954 /* Adjust the partial die before generating a symbol for it. This
955 function may set the is_external flag or change the DIE's
957 void fixup (struct dwarf2_cu
*cu
);
959 /* Read a minimal amount of information into the minimal die
961 const gdb_byte
*read (const struct die_reader_specs
*reader
,
962 const struct abbrev_info
&abbrev
,
963 const gdb_byte
*info_ptr
);
965 /* Offset of this DIE. */
966 const sect_offset sect_off
;
968 /* DWARF-2 tag for this DIE. */
969 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
971 /* Assorted flags describing the data found in this DIE. */
972 const unsigned int has_children
: 1;
974 unsigned int is_external
: 1;
975 unsigned int is_declaration
: 1;
976 unsigned int has_type
: 1;
977 unsigned int has_specification
: 1;
978 unsigned int has_pc_info
: 1;
979 unsigned int may_be_inlined
: 1;
981 /* This DIE has been marked DW_AT_main_subprogram. */
982 unsigned int main_subprogram
: 1;
984 /* Flag set if the SCOPE field of this structure has been
986 unsigned int scope_set
: 1;
988 /* Flag set if the DIE has a byte_size attribute. */
989 unsigned int has_byte_size
: 1;
991 /* Flag set if the DIE has a DW_AT_const_value attribute. */
992 unsigned int has_const_value
: 1;
994 /* Flag set if any of the DIE's children are template arguments. */
995 unsigned int has_template_arguments
: 1;
997 /* Flag set if fixup has been called on this die. */
998 unsigned int fixup_called
: 1;
1000 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1001 unsigned int is_dwz
: 1;
1003 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1004 unsigned int spec_is_dwz
: 1;
1006 /* The name of this DIE. Normally the value of DW_AT_name, but
1007 sometimes a default name for unnamed DIEs. */
1008 const char *name
= nullptr;
1010 /* The linkage name, if present. */
1011 const char *linkage_name
= nullptr;
1013 /* The scope to prepend to our children. This is generally
1014 allocated on the comp_unit_obstack, so will disappear
1015 when this compilation unit leaves the cache. */
1016 const char *scope
= nullptr;
1018 /* Some data associated with the partial DIE. The tag determines
1019 which field is live. */
1022 /* The location description associated with this DIE, if any. */
1023 struct dwarf_block
*locdesc
;
1024 /* The offset of an import, for DW_TAG_imported_unit. */
1025 sect_offset sect_off
;
1028 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1029 CORE_ADDR lowpc
= 0;
1030 CORE_ADDR highpc
= 0;
1032 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1033 DW_AT_sibling, if any. */
1034 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1035 could return DW_AT_sibling values to its caller load_partial_dies. */
1036 const gdb_byte
*sibling
= nullptr;
1038 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1039 DW_AT_specification (or DW_AT_abstract_origin or
1040 DW_AT_extension). */
1041 sect_offset spec_offset
{};
1043 /* Pointers to this DIE's parent, first child, and next sibling,
1045 struct partial_die_info
*die_parent
= nullptr;
1046 struct partial_die_info
*die_child
= nullptr;
1047 struct partial_die_info
*die_sibling
= nullptr;
1049 friend struct partial_die_info
*
1050 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1053 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1054 partial_die_info (sect_offset sect_off
)
1055 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1059 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1061 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1066 has_specification
= 0;
1069 main_subprogram
= 0;
1072 has_const_value
= 0;
1073 has_template_arguments
= 0;
1080 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1081 but this would require a corresponding change in unpack_field_as_long
1083 static int bits_per_byte
= 8;
1085 struct variant_part_builder
;
1087 /* When reading a variant, we track a bit more information about the
1088 field, and store it in an object of this type. */
1090 struct variant_field
1092 int first_field
= -1;
1093 int last_field
= -1;
1095 /* A variant can contain other variant parts. */
1096 std::vector
<variant_part_builder
> variant_parts
;
1098 /* If we see a DW_TAG_variant, then this will be set if this is the
1100 bool default_branch
= false;
1101 /* If we see a DW_AT_discr_value, then this will be the discriminant
1103 ULONGEST discriminant_value
= 0;
1104 /* If we see a DW_AT_discr_list, then this is a pointer to the list
1106 struct dwarf_block
*discr_list_data
= nullptr;
1109 /* This represents a DW_TAG_variant_part. */
1111 struct variant_part_builder
1113 /* The offset of the discriminant field. */
1114 sect_offset discriminant_offset
{};
1116 /* Variants that are direct children of this variant part. */
1117 std::vector
<variant_field
> variants
;
1119 /* True if we're currently reading a variant. */
1120 bool processing_variant
= false;
1125 int accessibility
= 0;
1127 /* Variant parts need to find the discriminant, which is a DIE
1128 reference. We track the section offset of each field to make
1131 struct field field
{};
1136 const char *name
= nullptr;
1137 std::vector
<struct fn_field
> fnfields
;
1140 /* The routines that read and process dies for a C struct or C++ class
1141 pass lists of data member fields and lists of member function fields
1142 in an instance of a field_info structure, as defined below. */
1145 /* List of data member and baseclasses fields. */
1146 std::vector
<struct nextfield
> fields
;
1147 std::vector
<struct nextfield
> baseclasses
;
1149 /* Set if the accessibility of one of the fields is not public. */
1150 int non_public_fields
= 0;
1152 /* Member function fieldlist array, contains name of possibly overloaded
1153 member function, number of overloaded member functions and a pointer
1154 to the head of the member function field chain. */
1155 std::vector
<struct fnfieldlist
> fnfieldlists
;
1157 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1158 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1159 std::vector
<struct decl_field
> typedef_field_list
;
1161 /* Nested types defined by this class and the number of elements in this
1163 std::vector
<struct decl_field
> nested_types_list
;
1165 /* If non-null, this is the variant part we are currently
1167 variant_part_builder
*current_variant_part
= nullptr;
1168 /* This holds all the top-level variant parts attached to the type
1170 std::vector
<variant_part_builder
> variant_parts
;
1172 /* Return the total number of fields (including baseclasses). */
1173 int nfields () const
1175 return fields
.size () + baseclasses
.size ();
1179 /* Loaded secondary compilation units are kept in memory until they
1180 have not been referenced for the processing of this many
1181 compilation units. Set this to zero to disable caching. Cache
1182 sizes of up to at least twenty will improve startup time for
1183 typical inter-CU-reference binaries, at an obvious memory cost. */
1184 static int dwarf_max_cache_age
= 5;
1186 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1187 struct cmd_list_element
*c
, const char *value
)
1189 fprintf_filtered (file
, _("The upper bound on the age of cached "
1190 "DWARF compilation units is %s.\n"),
1194 /* local function prototypes */
1196 static void dwarf2_find_base_address (struct die_info
*die
,
1197 struct dwarf2_cu
*cu
);
1199 static dwarf2_psymtab
*create_partial_symtab
1200 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1202 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1203 const gdb_byte
*info_ptr
,
1204 struct die_info
*type_unit_die
);
1206 static void dwarf2_build_psymtabs_hard
1207 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1209 static void scan_partial_symbols (struct partial_die_info
*,
1210 CORE_ADDR
*, CORE_ADDR
*,
1211 int, struct dwarf2_cu
*);
1213 static void add_partial_symbol (struct partial_die_info
*,
1214 struct dwarf2_cu
*);
1216 static void add_partial_namespace (struct partial_die_info
*pdi
,
1217 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1218 int set_addrmap
, struct dwarf2_cu
*cu
);
1220 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1221 CORE_ADDR
*highpc
, int set_addrmap
,
1222 struct dwarf2_cu
*cu
);
1224 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1225 struct dwarf2_cu
*cu
);
1227 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1228 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1229 int need_pc
, struct dwarf2_cu
*cu
);
1231 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1233 static struct partial_die_info
*load_partial_dies
1234 (const struct die_reader_specs
*, const gdb_byte
*, int);
1236 /* A pair of partial_die_info and compilation unit. */
1237 struct cu_partial_die_info
1239 /* The compilation unit of the partial_die_info. */
1240 struct dwarf2_cu
*cu
;
1241 /* A partial_die_info. */
1242 struct partial_die_info
*pdi
;
1244 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1250 cu_partial_die_info () = delete;
1253 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1254 struct dwarf2_cu
*);
1256 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1257 struct attribute
*, struct attr_abbrev
*,
1258 const gdb_byte
*, bool *need_reprocess
);
1260 static void read_attribute_reprocess (const struct die_reader_specs
*reader
,
1261 struct attribute
*attr
);
1263 static CORE_ADDR
read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
);
1265 static sect_offset read_abbrev_offset
1266 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1267 struct dwarf2_section_info
*, sect_offset
);
1269 static const char *read_indirect_string
1270 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1271 const struct comp_unit_head
*, unsigned int *);
1273 static const char *read_indirect_string_at_offset
1274 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, LONGEST str_offset
);
1276 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1280 static const char *read_dwo_str_index (const struct die_reader_specs
*reader
,
1281 ULONGEST str_index
);
1283 static const char *read_stub_str_index (struct dwarf2_cu
*cu
,
1284 ULONGEST str_index
);
1286 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1288 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1289 struct dwarf2_cu
*);
1291 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1292 struct dwarf2_cu
*cu
);
1294 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1296 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1297 struct dwarf2_cu
*cu
);
1299 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1301 static struct die_info
*die_specification (struct die_info
*die
,
1302 struct dwarf2_cu
**);
1304 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1305 struct dwarf2_cu
*cu
);
1307 static void dwarf_decode_lines (struct line_header
*, const char *,
1308 struct dwarf2_cu
*, dwarf2_psymtab
*,
1309 CORE_ADDR
, int decode_mapping
);
1311 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1314 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1315 struct dwarf2_cu
*, struct symbol
* = NULL
);
1317 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1318 struct dwarf2_cu
*);
1320 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1323 struct obstack
*obstack
,
1324 struct dwarf2_cu
*cu
, LONGEST
*value
,
1325 const gdb_byte
**bytes
,
1326 struct dwarf2_locexpr_baton
**baton
);
1328 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1330 static int need_gnat_info (struct dwarf2_cu
*);
1332 static struct type
*die_descriptive_type (struct die_info
*,
1333 struct dwarf2_cu
*);
1335 static void set_descriptive_type (struct type
*, struct die_info
*,
1336 struct dwarf2_cu
*);
1338 static struct type
*die_containing_type (struct die_info
*,
1339 struct dwarf2_cu
*);
1341 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1342 struct dwarf2_cu
*);
1344 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1346 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1348 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1350 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1351 const char *suffix
, int physname
,
1352 struct dwarf2_cu
*cu
);
1354 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1356 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1358 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1360 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1362 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1364 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1366 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1367 struct dwarf2_cu
*, dwarf2_psymtab
*);
1369 /* Return the .debug_loclists section to use for cu. */
1370 static struct dwarf2_section_info
*cu_debug_loc_section (struct dwarf2_cu
*cu
);
1372 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1373 values. Keep the items ordered with increasing constraints compliance. */
1376 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1377 PC_BOUNDS_NOT_PRESENT
,
1379 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1380 were present but they do not form a valid range of PC addresses. */
1383 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1386 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1390 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1391 CORE_ADDR
*, CORE_ADDR
*,
1395 static void get_scope_pc_bounds (struct die_info
*,
1396 CORE_ADDR
*, CORE_ADDR
*,
1397 struct dwarf2_cu
*);
1399 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1400 CORE_ADDR
, struct dwarf2_cu
*);
1402 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1403 struct dwarf2_cu
*);
1405 static void dwarf2_attach_fields_to_type (struct field_info
*,
1406 struct type
*, struct dwarf2_cu
*);
1408 static void dwarf2_add_member_fn (struct field_info
*,
1409 struct die_info
*, struct type
*,
1410 struct dwarf2_cu
*);
1412 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1414 struct dwarf2_cu
*);
1416 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1418 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1420 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1422 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1424 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1426 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1428 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1430 static struct type
*read_module_type (struct die_info
*die
,
1431 struct dwarf2_cu
*cu
);
1433 static const char *namespace_name (struct die_info
*die
,
1434 int *is_anonymous
, struct dwarf2_cu
*);
1436 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1438 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*,
1441 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1442 struct dwarf2_cu
*);
1444 static struct die_info
*read_die_and_siblings_1
1445 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1448 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1449 const gdb_byte
*info_ptr
,
1450 const gdb_byte
**new_info_ptr
,
1451 struct die_info
*parent
);
1453 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1454 struct die_info
**, const gdb_byte
*,
1457 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1458 struct die_info
**, const gdb_byte
*);
1460 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1462 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1465 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1467 static const char *dwarf2_full_name (const char *name
,
1468 struct die_info
*die
,
1469 struct dwarf2_cu
*cu
);
1471 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1472 struct dwarf2_cu
*cu
);
1474 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1475 struct dwarf2_cu
**);
1477 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1479 static void dump_die_for_error (struct die_info
*);
1481 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1484 /*static*/ void dump_die (struct die_info
*, int max_level
);
1486 static void store_in_ref_table (struct die_info
*,
1487 struct dwarf2_cu
*);
1489 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1490 const struct attribute
*,
1491 struct dwarf2_cu
**);
1493 static struct die_info
*follow_die_ref (struct die_info
*,
1494 const struct attribute
*,
1495 struct dwarf2_cu
**);
1497 static struct die_info
*follow_die_sig (struct die_info
*,
1498 const struct attribute
*,
1499 struct dwarf2_cu
**);
1501 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1502 struct dwarf2_cu
*);
1504 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1505 const struct attribute
*,
1506 struct dwarf2_cu
*);
1508 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1510 static void read_signatured_type (struct signatured_type
*);
1512 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1513 struct die_info
*die
, struct dwarf2_cu
*cu
,
1514 struct dynamic_prop
*prop
, struct type
*type
);
1516 /* memory allocation interface */
1518 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1520 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1522 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1524 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1525 struct dwarf2_loclist_baton
*baton
,
1526 const struct attribute
*attr
);
1528 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1530 struct dwarf2_cu
*cu
,
1533 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1534 const gdb_byte
*info_ptr
,
1535 struct abbrev_info
*abbrev
);
1537 static hashval_t
partial_die_hash (const void *item
);
1539 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1541 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1542 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1543 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1545 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1546 struct die_info
*comp_unit_die
,
1547 enum language pretend_language
);
1549 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1551 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1553 static struct type
*set_die_type (struct die_info
*, struct type
*,
1554 struct dwarf2_cu
*);
1556 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1558 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1560 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1563 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1566 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1569 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1570 struct dwarf2_per_cu_data
*);
1572 static void dwarf2_mark (struct dwarf2_cu
*);
1574 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1576 static struct type
*get_die_type_at_offset (sect_offset
,
1577 struct dwarf2_per_cu_data
*);
1579 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1581 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1582 enum language pretend_language
);
1584 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1586 /* Class, the destructor of which frees all allocated queue entries. This
1587 will only have work to do if an error was thrown while processing the
1588 dwarf. If no error was thrown then the queue entries should have all
1589 been processed, and freed, as we went along. */
1591 class dwarf2_queue_guard
1594 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1595 : m_per_objfile (per_objfile
)
1599 /* Free any entries remaining on the queue. There should only be
1600 entries left if we hit an error while processing the dwarf. */
1601 ~dwarf2_queue_guard ()
1603 /* Ensure that no memory is allocated by the queue. */
1604 std::queue
<dwarf2_queue_item
> empty
;
1605 std::swap (m_per_objfile
->queue
, empty
);
1608 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1611 dwarf2_per_objfile
*m_per_objfile
;
1614 dwarf2_queue_item::~dwarf2_queue_item ()
1616 /* Anything still marked queued is likely to be in an
1617 inconsistent state, so discard it. */
1620 if (per_cu
->cu
!= NULL
)
1621 free_one_cached_comp_unit (per_cu
);
1626 /* The return type of find_file_and_directory. Note, the enclosed
1627 string pointers are only valid while this object is valid. */
1629 struct file_and_directory
1631 /* The filename. This is never NULL. */
1634 /* The compilation directory. NULL if not known. If we needed to
1635 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1636 points directly to the DW_AT_comp_dir string attribute owned by
1637 the obstack that owns the DIE. */
1638 const char *comp_dir
;
1640 /* If we needed to build a new string for comp_dir, this is what
1641 owns the storage. */
1642 std::string comp_dir_storage
;
1645 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1646 struct dwarf2_cu
*cu
);
1648 static htab_up
allocate_signatured_type_table ();
1650 static htab_up
allocate_dwo_unit_table ();
1652 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1653 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1654 struct dwp_file
*dwp_file
, const char *comp_dir
,
1655 ULONGEST signature
, int is_debug_types
);
1657 static struct dwp_file
*get_dwp_file
1658 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1660 static struct dwo_unit
*lookup_dwo_comp_unit
1661 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1663 static struct dwo_unit
*lookup_dwo_type_unit
1664 (struct signatured_type
*, const char *, const char *);
1666 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1668 /* A unique pointer to a dwo_file. */
1670 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1672 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1674 static void check_producer (struct dwarf2_cu
*cu
);
1676 static void free_line_header_voidp (void *arg
);
1678 /* Various complaints about symbol reading that don't abort the process. */
1681 dwarf2_debug_line_missing_file_complaint (void)
1683 complaint (_(".debug_line section has line data without a file"));
1687 dwarf2_debug_line_missing_end_sequence_complaint (void)
1689 complaint (_(".debug_line section has line "
1690 "program sequence without an end"));
1694 dwarf2_complex_location_expr_complaint (void)
1696 complaint (_("location expression too complex"));
1700 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1703 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1708 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1710 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1714 /* Hash function for line_header_hash. */
1717 line_header_hash (const struct line_header
*ofs
)
1719 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1722 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1725 line_header_hash_voidp (const void *item
)
1727 const struct line_header
*ofs
= (const struct line_header
*) item
;
1729 return line_header_hash (ofs
);
1732 /* Equality function for line_header_hash. */
1735 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1737 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1738 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1740 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1741 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1746 /* See declaration. */
1748 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
1749 const dwarf2_debug_sections
*names
,
1751 : objfile (objfile_
),
1752 can_copy (can_copy_
)
1755 names
= &dwarf2_elf_names
;
1757 bfd
*obfd
= objfile
->obfd
;
1759 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1760 locate_sections (obfd
, sec
, *names
);
1763 dwarf2_per_objfile::~dwarf2_per_objfile ()
1765 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
1766 free_cached_comp_units ();
1768 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
1769 per_cu
->imported_symtabs_free ();
1771 for (signatured_type
*sig_type
: all_type_units
)
1772 sig_type
->per_cu
.imported_symtabs_free ();
1774 /* Everything else should be on the objfile obstack. */
1777 /* See declaration. */
1780 dwarf2_per_objfile::free_cached_comp_units ()
1782 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
1783 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
1784 while (per_cu
!= NULL
)
1786 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
1789 *last_chain
= next_cu
;
1794 /* A helper class that calls free_cached_comp_units on
1797 class free_cached_comp_units
1801 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
1802 : m_per_objfile (per_objfile
)
1806 ~free_cached_comp_units ()
1808 m_per_objfile
->free_cached_comp_units ();
1811 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
1815 dwarf2_per_objfile
*m_per_objfile
;
1818 /* Try to locate the sections we need for DWARF 2 debugging
1819 information and return true if we have enough to do something.
1820 NAMES points to the dwarf2 section names, or is NULL if the standard
1821 ELF names are used. CAN_COPY is true for formats where symbol
1822 interposition is possible and so symbol values must follow copy
1823 relocation rules. */
1826 dwarf2_has_info (struct objfile
*objfile
,
1827 const struct dwarf2_debug_sections
*names
,
1830 if (objfile
->flags
& OBJF_READNEVER
)
1833 struct dwarf2_per_objfile
*dwarf2_per_objfile
1834 = get_dwarf2_per_objfile (objfile
);
1836 if (dwarf2_per_objfile
== NULL
)
1837 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
1841 return (!dwarf2_per_objfile
->info
.is_virtual
1842 && dwarf2_per_objfile
->info
.s
.section
!= NULL
1843 && !dwarf2_per_objfile
->abbrev
.is_virtual
1844 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
1847 /* When loading sections, we look either for uncompressed section or for
1848 compressed section names. */
1851 section_is_p (const char *section_name
,
1852 const struct dwarf2_section_names
*names
)
1854 if (names
->normal
!= NULL
1855 && strcmp (section_name
, names
->normal
) == 0)
1857 if (names
->compressed
!= NULL
1858 && strcmp (section_name
, names
->compressed
) == 0)
1863 /* See declaration. */
1866 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
1867 const dwarf2_debug_sections
&names
)
1869 flagword aflag
= bfd_section_flags (sectp
);
1871 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1874 else if (elf_section_data (sectp
)->this_hdr
.sh_size
1875 > bfd_get_file_size (abfd
))
1877 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
1878 warning (_("Discarding section %s which has a section size (%s"
1879 ") larger than the file size [in module %s]"),
1880 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
1881 bfd_get_filename (abfd
));
1883 else if (section_is_p (sectp
->name
, &names
.info
))
1885 this->info
.s
.section
= sectp
;
1886 this->info
.size
= bfd_section_size (sectp
);
1888 else if (section_is_p (sectp
->name
, &names
.abbrev
))
1890 this->abbrev
.s
.section
= sectp
;
1891 this->abbrev
.size
= bfd_section_size (sectp
);
1893 else if (section_is_p (sectp
->name
, &names
.line
))
1895 this->line
.s
.section
= sectp
;
1896 this->line
.size
= bfd_section_size (sectp
);
1898 else if (section_is_p (sectp
->name
, &names
.loc
))
1900 this->loc
.s
.section
= sectp
;
1901 this->loc
.size
= bfd_section_size (sectp
);
1903 else if (section_is_p (sectp
->name
, &names
.loclists
))
1905 this->loclists
.s
.section
= sectp
;
1906 this->loclists
.size
= bfd_section_size (sectp
);
1908 else if (section_is_p (sectp
->name
, &names
.macinfo
))
1910 this->macinfo
.s
.section
= sectp
;
1911 this->macinfo
.size
= bfd_section_size (sectp
);
1913 else if (section_is_p (sectp
->name
, &names
.macro
))
1915 this->macro
.s
.section
= sectp
;
1916 this->macro
.size
= bfd_section_size (sectp
);
1918 else if (section_is_p (sectp
->name
, &names
.str
))
1920 this->str
.s
.section
= sectp
;
1921 this->str
.size
= bfd_section_size (sectp
);
1923 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
1925 this->str_offsets
.s
.section
= sectp
;
1926 this->str_offsets
.size
= bfd_section_size (sectp
);
1928 else if (section_is_p (sectp
->name
, &names
.line_str
))
1930 this->line_str
.s
.section
= sectp
;
1931 this->line_str
.size
= bfd_section_size (sectp
);
1933 else if (section_is_p (sectp
->name
, &names
.addr
))
1935 this->addr
.s
.section
= sectp
;
1936 this->addr
.size
= bfd_section_size (sectp
);
1938 else if (section_is_p (sectp
->name
, &names
.frame
))
1940 this->frame
.s
.section
= sectp
;
1941 this->frame
.size
= bfd_section_size (sectp
);
1943 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
1945 this->eh_frame
.s
.section
= sectp
;
1946 this->eh_frame
.size
= bfd_section_size (sectp
);
1948 else if (section_is_p (sectp
->name
, &names
.ranges
))
1950 this->ranges
.s
.section
= sectp
;
1951 this->ranges
.size
= bfd_section_size (sectp
);
1953 else if (section_is_p (sectp
->name
, &names
.rnglists
))
1955 this->rnglists
.s
.section
= sectp
;
1956 this->rnglists
.size
= bfd_section_size (sectp
);
1958 else if (section_is_p (sectp
->name
, &names
.types
))
1960 struct dwarf2_section_info type_section
;
1962 memset (&type_section
, 0, sizeof (type_section
));
1963 type_section
.s
.section
= sectp
;
1964 type_section
.size
= bfd_section_size (sectp
);
1966 this->types
.push_back (type_section
);
1968 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
1970 this->gdb_index
.s
.section
= sectp
;
1971 this->gdb_index
.size
= bfd_section_size (sectp
);
1973 else if (section_is_p (sectp
->name
, &names
.debug_names
))
1975 this->debug_names
.s
.section
= sectp
;
1976 this->debug_names
.size
= bfd_section_size (sectp
);
1978 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
1980 this->debug_aranges
.s
.section
= sectp
;
1981 this->debug_aranges
.size
= bfd_section_size (sectp
);
1984 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
1985 && bfd_section_vma (sectp
) == 0)
1986 this->has_section_at_zero
= true;
1989 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1993 dwarf2_get_section_info (struct objfile
*objfile
,
1994 enum dwarf2_section_enum sect
,
1995 asection
**sectp
, const gdb_byte
**bufp
,
1996 bfd_size_type
*sizep
)
1998 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
1999 struct dwarf2_section_info
*info
;
2001 /* We may see an objfile without any DWARF, in which case we just
2012 case DWARF2_DEBUG_FRAME
:
2013 info
= &data
->frame
;
2015 case DWARF2_EH_FRAME
:
2016 info
= &data
->eh_frame
;
2019 gdb_assert_not_reached ("unexpected section");
2022 info
->read (objfile
);
2024 *sectp
= info
->get_bfd_section ();
2025 *bufp
= info
->buffer
;
2026 *sizep
= info
->size
;
2029 /* A helper function to find the sections for a .dwz file. */
2032 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2034 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2036 /* Note that we only support the standard ELF names, because .dwz
2037 is ELF-only (at the time of writing). */
2038 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2040 dwz_file
->abbrev
.s
.section
= sectp
;
2041 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2043 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2045 dwz_file
->info
.s
.section
= sectp
;
2046 dwz_file
->info
.size
= bfd_section_size (sectp
);
2048 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2050 dwz_file
->str
.s
.section
= sectp
;
2051 dwz_file
->str
.size
= bfd_section_size (sectp
);
2053 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2055 dwz_file
->line
.s
.section
= sectp
;
2056 dwz_file
->line
.size
= bfd_section_size (sectp
);
2058 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2060 dwz_file
->macro
.s
.section
= sectp
;
2061 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2063 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2065 dwz_file
->gdb_index
.s
.section
= sectp
;
2066 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2068 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2070 dwz_file
->debug_names
.s
.section
= sectp
;
2071 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2075 /* See dwarf2read.h. */
2078 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2080 const char *filename
;
2081 bfd_size_type buildid_len_arg
;
2085 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2086 return dwarf2_per_objfile
->dwz_file
.get ();
2088 bfd_set_error (bfd_error_no_error
);
2089 gdb::unique_xmalloc_ptr
<char> data
2090 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2091 &buildid_len_arg
, &buildid
));
2094 if (bfd_get_error () == bfd_error_no_error
)
2096 error (_("could not read '.gnu_debugaltlink' section: %s"),
2097 bfd_errmsg (bfd_get_error ()));
2100 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2102 buildid_len
= (size_t) buildid_len_arg
;
2104 filename
= data
.get ();
2106 std::string abs_storage
;
2107 if (!IS_ABSOLUTE_PATH (filename
))
2109 gdb::unique_xmalloc_ptr
<char> abs
2110 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2112 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2113 filename
= abs_storage
.c_str ();
2116 /* First try the file name given in the section. If that doesn't
2117 work, try to use the build-id instead. */
2118 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2119 if (dwz_bfd
!= NULL
)
2121 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2122 dwz_bfd
.reset (nullptr);
2125 if (dwz_bfd
== NULL
)
2126 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2128 if (dwz_bfd
== nullptr)
2130 gdb::unique_xmalloc_ptr
<char> alt_filename
;
2131 const char *origname
= dwarf2_per_objfile
->objfile
->original_name
;
2133 scoped_fd
fd (debuginfod_debuginfo_query (buildid
,
2140 /* File successfully retrieved from server. */
2141 dwz_bfd
= gdb_bfd_open (alt_filename
.get (), gnutarget
, -1);
2143 if (dwz_bfd
== nullptr)
2144 warning (_("File \"%s\" from debuginfod cannot be opened as bfd"),
2145 alt_filename
.get ());
2146 else if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2147 dwz_bfd
.reset (nullptr);
2151 if (dwz_bfd
== NULL
)
2152 error (_("could not find '.gnu_debugaltlink' file for %s"),
2153 objfile_name (dwarf2_per_objfile
->objfile
));
2155 std::unique_ptr
<struct dwz_file
> result
2156 (new struct dwz_file (std::move (dwz_bfd
)));
2158 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2161 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2162 result
->dwz_bfd
.get ());
2163 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2164 return dwarf2_per_objfile
->dwz_file
.get ();
2167 /* DWARF quick_symbols_functions support. */
2169 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2170 unique line tables, so we maintain a separate table of all .debug_line
2171 derived entries to support the sharing.
2172 All the quick functions need is the list of file names. We discard the
2173 line_header when we're done and don't need to record it here. */
2174 struct quick_file_names
2176 /* The data used to construct the hash key. */
2177 struct stmt_list_hash hash
;
2179 /* The number of entries in file_names, real_names. */
2180 unsigned int num_file_names
;
2182 /* The file names from the line table, after being run through
2184 const char **file_names
;
2186 /* The file names from the line table after being run through
2187 gdb_realpath. These are computed lazily. */
2188 const char **real_names
;
2191 /* When using the index (and thus not using psymtabs), each CU has an
2192 object of this type. This is used to hold information needed by
2193 the various "quick" methods. */
2194 struct dwarf2_per_cu_quick_data
2196 /* The file table. This can be NULL if there was no file table
2197 or it's currently not read in.
2198 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2199 struct quick_file_names
*file_names
;
2201 /* The corresponding symbol table. This is NULL if symbols for this
2202 CU have not yet been read. */
2203 struct compunit_symtab
*compunit_symtab
;
2205 /* A temporary mark bit used when iterating over all CUs in
2206 expand_symtabs_matching. */
2207 unsigned int mark
: 1;
2209 /* True if we've tried to read the file table and found there isn't one.
2210 There will be no point in trying to read it again next time. */
2211 unsigned int no_file_data
: 1;
2214 /* Utility hash function for a stmt_list_hash. */
2217 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2221 if (stmt_list_hash
->dwo_unit
!= NULL
)
2222 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2223 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2227 /* Utility equality function for a stmt_list_hash. */
2230 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2231 const struct stmt_list_hash
*rhs
)
2233 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2235 if (lhs
->dwo_unit
!= NULL
2236 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2239 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2242 /* Hash function for a quick_file_names. */
2245 hash_file_name_entry (const void *e
)
2247 const struct quick_file_names
*file_data
2248 = (const struct quick_file_names
*) e
;
2250 return hash_stmt_list_entry (&file_data
->hash
);
2253 /* Equality function for a quick_file_names. */
2256 eq_file_name_entry (const void *a
, const void *b
)
2258 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2259 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2261 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2264 /* Delete function for a quick_file_names. */
2267 delete_file_name_entry (void *e
)
2269 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2272 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2274 xfree ((void*) file_data
->file_names
[i
]);
2275 if (file_data
->real_names
)
2276 xfree ((void*) file_data
->real_names
[i
]);
2279 /* The space for the struct itself lives on objfile_obstack,
2280 so we don't free it here. */
2283 /* Create a quick_file_names hash table. */
2286 create_quick_file_names_table (unsigned int nr_initial_entries
)
2288 return htab_up (htab_create_alloc (nr_initial_entries
,
2289 hash_file_name_entry
, eq_file_name_entry
,
2290 delete_file_name_entry
, xcalloc
, xfree
));
2293 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2294 have to be created afterwards. You should call age_cached_comp_units after
2295 processing PER_CU->CU. dw2_setup must have been already called. */
2298 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2300 if (per_cu
->is_debug_types
)
2301 load_full_type_unit (per_cu
);
2303 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2305 if (per_cu
->cu
== NULL
)
2306 return; /* Dummy CU. */
2308 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2311 /* Read in the symbols for PER_CU. */
2314 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2316 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2318 /* Skip type_unit_groups, reading the type units they contain
2319 is handled elsewhere. */
2320 if (per_cu
->type_unit_group_p ())
2323 /* The destructor of dwarf2_queue_guard frees any entries left on
2324 the queue. After this point we're guaranteed to leave this function
2325 with the dwarf queue empty. */
2326 dwarf2_queue_guard
q_guard (dwarf2_per_objfile
);
2328 if (dwarf2_per_objfile
->using_index
2329 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2330 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2332 queue_comp_unit (per_cu
, language_minimal
);
2333 load_cu (per_cu
, skip_partial
);
2335 /* If we just loaded a CU from a DWO, and we're working with an index
2336 that may badly handle TUs, load all the TUs in that DWO as well.
2337 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2338 if (!per_cu
->is_debug_types
2339 && per_cu
->cu
!= NULL
2340 && per_cu
->cu
->dwo_unit
!= NULL
2341 && dwarf2_per_objfile
->index_table
!= NULL
2342 && dwarf2_per_objfile
->index_table
->version
<= 7
2343 /* DWP files aren't supported yet. */
2344 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2345 queue_and_load_all_dwo_tus (per_cu
);
2348 process_queue (dwarf2_per_objfile
);
2350 /* Age the cache, releasing compilation units that have not
2351 been used recently. */
2352 age_cached_comp_units (dwarf2_per_objfile
);
2355 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2356 the objfile from which this CU came. Returns the resulting symbol
2359 static struct compunit_symtab
*
2360 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2362 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2364 gdb_assert (dwarf2_per_objfile
->using_index
);
2365 if (!per_cu
->v
.quick
->compunit_symtab
)
2367 free_cached_comp_units
freer (dwarf2_per_objfile
);
2368 scoped_restore decrementer
= increment_reading_symtab ();
2369 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2370 process_cu_includes (dwarf2_per_objfile
);
2373 return per_cu
->v
.quick
->compunit_symtab
;
2376 /* See declaration. */
2378 dwarf2_per_cu_data
*
2379 dwarf2_per_objfile::get_cutu (int index
)
2381 if (index
>= this->all_comp_units
.size ())
2383 index
-= this->all_comp_units
.size ();
2384 gdb_assert (index
< this->all_type_units
.size ());
2385 return &this->all_type_units
[index
]->per_cu
;
2388 return this->all_comp_units
[index
];
2391 /* See declaration. */
2393 dwarf2_per_cu_data
*
2394 dwarf2_per_objfile::get_cu (int index
)
2396 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2398 return this->all_comp_units
[index
];
2401 /* See declaration. */
2404 dwarf2_per_objfile::get_tu (int index
)
2406 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2408 return this->all_type_units
[index
];
2411 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2412 objfile_obstack, and constructed with the specified field
2415 static dwarf2_per_cu_data
*
2416 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2417 struct dwarf2_section_info
*section
,
2419 sect_offset sect_off
, ULONGEST length
)
2421 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2422 dwarf2_per_cu_data
*the_cu
2423 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2424 struct dwarf2_per_cu_data
);
2425 the_cu
->sect_off
= sect_off
;
2426 the_cu
->length
= length
;
2427 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2428 the_cu
->section
= section
;
2429 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2430 struct dwarf2_per_cu_quick_data
);
2431 the_cu
->is_dwz
= is_dwz
;
2435 /* A helper for create_cus_from_index that handles a given list of
2439 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2440 const gdb_byte
*cu_list
, offset_type n_elements
,
2441 struct dwarf2_section_info
*section
,
2444 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2446 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2448 sect_offset sect_off
2449 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2450 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2453 dwarf2_per_cu_data
*per_cu
2454 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2456 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
2460 /* Read the CU list from the mapped index, and use it to create all
2461 the CU objects for this objfile. */
2464 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2465 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2466 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2468 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
2469 dwarf2_per_objfile
->all_comp_units
.reserve
2470 ((cu_list_elements
+ dwz_elements
) / 2);
2472 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
2473 &dwarf2_per_objfile
->info
, 0);
2475 if (dwz_elements
== 0)
2478 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
2479 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
2483 /* Create the signatured type hash table from the index. */
2486 create_signatured_type_table_from_index
2487 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2488 struct dwarf2_section_info
*section
,
2489 const gdb_byte
*bytes
,
2490 offset_type elements
)
2492 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2494 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2495 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
2497 htab_up sig_types_hash
= allocate_signatured_type_table ();
2499 for (offset_type i
= 0; i
< elements
; i
+= 3)
2501 struct signatured_type
*sig_type
;
2504 cu_offset type_offset_in_tu
;
2506 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2507 sect_offset sect_off
2508 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2510 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2512 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2515 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2516 struct signatured_type
);
2517 sig_type
->signature
= signature
;
2518 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2519 sig_type
->per_cu
.is_debug_types
= 1;
2520 sig_type
->per_cu
.section
= section
;
2521 sig_type
->per_cu
.sect_off
= sect_off
;
2522 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2523 sig_type
->per_cu
.v
.quick
2524 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2525 struct dwarf2_per_cu_quick_data
);
2527 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2530 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2533 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2536 /* Create the signatured type hash table from .debug_names. */
2539 create_signatured_type_table_from_debug_names
2540 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2541 const mapped_debug_names
&map
,
2542 struct dwarf2_section_info
*section
,
2543 struct dwarf2_section_info
*abbrev_section
)
2545 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2547 section
->read (objfile
);
2548 abbrev_section
->read (objfile
);
2550 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2551 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
2553 htab_up sig_types_hash
= allocate_signatured_type_table ();
2555 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2557 struct signatured_type
*sig_type
;
2560 sect_offset sect_off
2561 = (sect_offset
) (extract_unsigned_integer
2562 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2564 map
.dwarf5_byte_order
));
2566 comp_unit_head cu_header
;
2567 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
2569 section
->buffer
+ to_underlying (sect_off
),
2572 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2573 struct signatured_type
);
2574 sig_type
->signature
= cu_header
.signature
;
2575 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2576 sig_type
->per_cu
.is_debug_types
= 1;
2577 sig_type
->per_cu
.section
= section
;
2578 sig_type
->per_cu
.sect_off
= sect_off
;
2579 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2580 sig_type
->per_cu
.v
.quick
2581 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2582 struct dwarf2_per_cu_quick_data
);
2584 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2587 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2590 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2593 /* Read the address map data from the mapped index, and use it to
2594 populate the objfile's psymtabs_addrmap. */
2597 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2598 struct mapped_index
*index
)
2600 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2601 struct gdbarch
*gdbarch
= objfile
->arch ();
2602 const gdb_byte
*iter
, *end
;
2603 struct addrmap
*mutable_map
;
2606 auto_obstack temp_obstack
;
2608 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2610 iter
= index
->address_table
.data ();
2611 end
= iter
+ index
->address_table
.size ();
2613 baseaddr
= objfile
->text_section_offset ();
2617 ULONGEST hi
, lo
, cu_index
;
2618 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2620 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2622 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2627 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2628 hex_string (lo
), hex_string (hi
));
2632 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
2634 complaint (_(".gdb_index address table has invalid CU number %u"),
2635 (unsigned) cu_index
);
2639 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2640 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2641 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2642 dwarf2_per_objfile
->get_cu (cu_index
));
2645 objfile
->partial_symtabs
->psymtabs_addrmap
2646 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2649 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2650 populate the objfile's psymtabs_addrmap. */
2653 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2654 struct dwarf2_section_info
*section
)
2656 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2657 bfd
*abfd
= objfile
->obfd
;
2658 struct gdbarch
*gdbarch
= objfile
->arch ();
2659 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2661 auto_obstack temp_obstack
;
2662 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2664 std::unordered_map
<sect_offset
,
2665 dwarf2_per_cu_data
*,
2666 gdb::hash_enum
<sect_offset
>>
2667 debug_info_offset_to_per_cu
;
2668 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
2670 const auto insertpair
2671 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2672 if (!insertpair
.second
)
2674 warning (_("Section .debug_aranges in %s has duplicate "
2675 "debug_info_offset %s, ignoring .debug_aranges."),
2676 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2681 section
->read (objfile
);
2683 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2685 const gdb_byte
*addr
= section
->buffer
;
2687 while (addr
< section
->buffer
+ section
->size
)
2689 const gdb_byte
*const entry_addr
= addr
;
2690 unsigned int bytes_read
;
2692 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2696 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2697 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2698 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2699 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2701 warning (_("Section .debug_aranges in %s entry at offset %s "
2702 "length %s exceeds section length %s, "
2703 "ignoring .debug_aranges."),
2704 objfile_name (objfile
),
2705 plongest (entry_addr
- section
->buffer
),
2706 plongest (bytes_read
+ entry_length
),
2707 pulongest (section
->size
));
2711 /* The version number. */
2712 const uint16_t version
= read_2_bytes (abfd
, addr
);
2716 warning (_("Section .debug_aranges in %s entry at offset %s "
2717 "has unsupported version %d, ignoring .debug_aranges."),
2718 objfile_name (objfile
),
2719 plongest (entry_addr
- section
->buffer
), version
);
2723 const uint64_t debug_info_offset
2724 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2725 addr
+= offset_size
;
2726 const auto per_cu_it
2727 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2728 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2730 warning (_("Section .debug_aranges in %s entry at offset %s "
2731 "debug_info_offset %s does not exists, "
2732 "ignoring .debug_aranges."),
2733 objfile_name (objfile
),
2734 plongest (entry_addr
- section
->buffer
),
2735 pulongest (debug_info_offset
));
2738 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2740 const uint8_t address_size
= *addr
++;
2741 if (address_size
< 1 || address_size
> 8)
2743 warning (_("Section .debug_aranges in %s entry at offset %s "
2744 "address_size %u is invalid, ignoring .debug_aranges."),
2745 objfile_name (objfile
),
2746 plongest (entry_addr
- section
->buffer
), address_size
);
2750 const uint8_t segment_selector_size
= *addr
++;
2751 if (segment_selector_size
!= 0)
2753 warning (_("Section .debug_aranges in %s entry at offset %s "
2754 "segment_selector_size %u is not supported, "
2755 "ignoring .debug_aranges."),
2756 objfile_name (objfile
),
2757 plongest (entry_addr
- section
->buffer
),
2758 segment_selector_size
);
2762 /* Must pad to an alignment boundary that is twice the address
2763 size. It is undocumented by the DWARF standard but GCC does
2765 for (size_t padding
= ((-(addr
- section
->buffer
))
2766 & (2 * address_size
- 1));
2767 padding
> 0; padding
--)
2770 warning (_("Section .debug_aranges in %s entry at offset %s "
2771 "padding is not zero, ignoring .debug_aranges."),
2772 objfile_name (objfile
),
2773 plongest (entry_addr
- section
->buffer
));
2779 if (addr
+ 2 * address_size
> entry_end
)
2781 warning (_("Section .debug_aranges in %s entry at offset %s "
2782 "address list is not properly terminated, "
2783 "ignoring .debug_aranges."),
2784 objfile_name (objfile
),
2785 plongest (entry_addr
- section
->buffer
));
2788 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
2790 addr
+= address_size
;
2791 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
2793 addr
+= address_size
;
2794 if (start
== 0 && length
== 0)
2796 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
2798 /* Symbol was eliminated due to a COMDAT group. */
2801 ULONGEST end
= start
+ length
;
2802 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
2804 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
2806 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
2810 objfile
->partial_symtabs
->psymtabs_addrmap
2811 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2814 /* Find a slot in the mapped index INDEX for the object named NAME.
2815 If NAME is found, set *VEC_OUT to point to the CU vector in the
2816 constant pool and return true. If NAME cannot be found, return
2820 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2821 offset_type
**vec_out
)
2824 offset_type slot
, step
;
2825 int (*cmp
) (const char *, const char *);
2827 gdb::unique_xmalloc_ptr
<char> without_params
;
2828 if (current_language
->la_language
== language_cplus
2829 || current_language
->la_language
== language_fortran
2830 || current_language
->la_language
== language_d
)
2832 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2835 if (strchr (name
, '(') != NULL
)
2837 without_params
= cp_remove_params (name
);
2839 if (without_params
!= NULL
)
2840 name
= without_params
.get ();
2844 /* Index version 4 did not support case insensitive searches. But the
2845 indices for case insensitive languages are built in lowercase, therefore
2846 simulate our NAME being searched is also lowercased. */
2847 hash
= mapped_index_string_hash ((index
->version
== 4
2848 && case_sensitivity
== case_sensitive_off
2849 ? 5 : index
->version
),
2852 slot
= hash
& (index
->symbol_table
.size () - 1);
2853 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
2854 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2860 const auto &bucket
= index
->symbol_table
[slot
];
2861 if (bucket
.name
== 0 && bucket
.vec
== 0)
2864 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
2865 if (!cmp (name
, str
))
2867 *vec_out
= (offset_type
*) (index
->constant_pool
2868 + MAYBE_SWAP (bucket
.vec
));
2872 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
2876 /* A helper function that reads the .gdb_index from BUFFER and fills
2877 in MAP. FILENAME is the name of the file containing the data;
2878 it is used for error reporting. DEPRECATED_OK is true if it is
2879 ok to use deprecated sections.
2881 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2882 out parameters that are filled in with information about the CU and
2883 TU lists in the section.
2885 Returns true if all went well, false otherwise. */
2888 read_gdb_index_from_buffer (const char *filename
,
2890 gdb::array_view
<const gdb_byte
> buffer
,
2891 struct mapped_index
*map
,
2892 const gdb_byte
**cu_list
,
2893 offset_type
*cu_list_elements
,
2894 const gdb_byte
**types_list
,
2895 offset_type
*types_list_elements
)
2897 const gdb_byte
*addr
= &buffer
[0];
2899 /* Version check. */
2900 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
2901 /* Versions earlier than 3 emitted every copy of a psymbol. This
2902 causes the index to behave very poorly for certain requests. Version 3
2903 contained incomplete addrmap. So, it seems better to just ignore such
2907 static int warning_printed
= 0;
2908 if (!warning_printed
)
2910 warning (_("Skipping obsolete .gdb_index section in %s."),
2912 warning_printed
= 1;
2916 /* Index version 4 uses a different hash function than index version
2919 Versions earlier than 6 did not emit psymbols for inlined
2920 functions. Using these files will cause GDB not to be able to
2921 set breakpoints on inlined functions by name, so we ignore these
2922 indices unless the user has done
2923 "set use-deprecated-index-sections on". */
2924 if (version
< 6 && !deprecated_ok
)
2926 static int warning_printed
= 0;
2927 if (!warning_printed
)
2930 Skipping deprecated .gdb_index section in %s.\n\
2931 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2932 to use the section anyway."),
2934 warning_printed
= 1;
2938 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2939 of the TU (for symbols coming from TUs),
2940 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
2941 Plus gold-generated indices can have duplicate entries for global symbols,
2942 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
2943 These are just performance bugs, and we can't distinguish gdb-generated
2944 indices from gold-generated ones, so issue no warning here. */
2946 /* Indexes with higher version than the one supported by GDB may be no
2947 longer backward compatible. */
2951 map
->version
= version
;
2953 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2956 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2957 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2961 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2962 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2963 - MAYBE_SWAP (metadata
[i
]))
2967 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2968 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2970 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
2973 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2974 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2976 = gdb::array_view
<mapped_index::symbol_table_slot
>
2977 ((mapped_index::symbol_table_slot
*) symbol_table
,
2978 (mapped_index::symbol_table_slot
*) symbol_table_end
);
2981 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
2986 /* Callback types for dwarf2_read_gdb_index. */
2988 typedef gdb::function_view
2989 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
2990 get_gdb_index_contents_ftype
;
2991 typedef gdb::function_view
2992 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
2993 get_gdb_index_contents_dwz_ftype
;
2995 /* Read .gdb_index. If everything went ok, initialize the "quick"
2996 elements of all the CUs and return 1. Otherwise, return 0. */
2999 dwarf2_read_gdb_index
3000 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3001 get_gdb_index_contents_ftype get_gdb_index_contents
,
3002 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3004 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3005 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3006 struct dwz_file
*dwz
;
3007 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3009 gdb::array_view
<const gdb_byte
> main_index_contents
3010 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3012 if (main_index_contents
.empty ())
3015 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3016 if (!read_gdb_index_from_buffer (objfile_name (objfile
),
3017 use_deprecated_index_sections
,
3018 main_index_contents
, map
.get (), &cu_list
,
3019 &cu_list_elements
, &types_list
,
3020 &types_list_elements
))
3023 /* Don't use the index if it's empty. */
3024 if (map
->symbol_table
.empty ())
3027 /* If there is a .dwz file, read it so we can get its CU list as
3029 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3032 struct mapped_index dwz_map
;
3033 const gdb_byte
*dwz_types_ignore
;
3034 offset_type dwz_types_elements_ignore
;
3036 gdb::array_view
<const gdb_byte
> dwz_index_content
3037 = get_gdb_index_contents_dwz (objfile
, dwz
);
3039 if (dwz_index_content
.empty ())
3042 if (!read_gdb_index_from_buffer (bfd_get_filename (dwz
->dwz_bfd
.get ()),
3043 1, dwz_index_content
, &dwz_map
,
3044 &dwz_list
, &dwz_list_elements
,
3046 &dwz_types_elements_ignore
))
3048 warning (_("could not read '.gdb_index' section from %s; skipping"),
3049 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3054 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3055 dwz_list
, dwz_list_elements
);
3057 if (types_list_elements
)
3059 /* We can only handle a single .debug_types when we have an
3061 if (dwarf2_per_objfile
->types
.size () != 1)
3064 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
3066 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3067 types_list
, types_list_elements
);
3070 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3072 dwarf2_per_objfile
->index_table
= std::move (map
);
3073 dwarf2_per_objfile
->using_index
= 1;
3074 dwarf2_per_objfile
->quick_file_names_table
=
3075 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3080 /* die_reader_func for dw2_get_file_names. */
3083 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3084 const gdb_byte
*info_ptr
,
3085 struct die_info
*comp_unit_die
)
3087 struct dwarf2_cu
*cu
= reader
->cu
;
3088 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3089 struct dwarf2_per_objfile
*dwarf2_per_objfile
3090 = cu
->per_cu
->dwarf2_per_objfile
;
3091 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3092 struct dwarf2_per_cu_data
*lh_cu
;
3093 struct attribute
*attr
;
3095 struct quick_file_names
*qfn
;
3097 gdb_assert (! this_cu
->is_debug_types
);
3099 /* Our callers never want to match partial units -- instead they
3100 will match the enclosing full CU. */
3101 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3103 this_cu
->v
.quick
->no_file_data
= 1;
3111 sect_offset line_offset
{};
3113 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3114 if (attr
!= nullptr)
3116 struct quick_file_names find_entry
;
3118 line_offset
= (sect_offset
) DW_UNSND (attr
);
3120 /* We may have already read in this line header (TU line header sharing).
3121 If we have we're done. */
3122 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3123 find_entry
.hash
.line_sect_off
= line_offset
;
3124 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
.get (),
3125 &find_entry
, INSERT
);
3128 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3132 lh
= dwarf_decode_line_header (line_offset
, cu
);
3136 lh_cu
->v
.quick
->no_file_data
= 1;
3140 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3141 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3142 qfn
->hash
.line_sect_off
= line_offset
;
3143 gdb_assert (slot
!= NULL
);
3146 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3149 if (strcmp (fnd
.name
, "<unknown>") != 0)
3152 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3154 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, qfn
->num_file_names
);
3156 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3157 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3158 qfn
->file_names
[i
+ offset
] = lh
->file_full_name (i
+ 1,
3159 fnd
.comp_dir
).release ();
3160 qfn
->real_names
= NULL
;
3162 lh_cu
->v
.quick
->file_names
= qfn
;
3165 /* A helper for the "quick" functions which attempts to read the line
3166 table for THIS_CU. */
3168 static struct quick_file_names
*
3169 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3171 /* This should never be called for TUs. */
3172 gdb_assert (! this_cu
->is_debug_types
);
3173 /* Nor type unit groups. */
3174 gdb_assert (! this_cu
->type_unit_group_p ());
3176 if (this_cu
->v
.quick
->file_names
!= NULL
)
3177 return this_cu
->v
.quick
->file_names
;
3178 /* If we know there is no line data, no point in looking again. */
3179 if (this_cu
->v
.quick
->no_file_data
)
3182 cutu_reader
reader (this_cu
);
3183 if (!reader
.dummy_p
)
3184 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3186 if (this_cu
->v
.quick
->no_file_data
)
3188 return this_cu
->v
.quick
->file_names
;
3191 /* A helper for the "quick" functions which computes and caches the
3192 real path for a given file name from the line table. */
3195 dw2_get_real_path (struct objfile
*objfile
,
3196 struct quick_file_names
*qfn
, int index
)
3198 if (qfn
->real_names
== NULL
)
3199 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3200 qfn
->num_file_names
, const char *);
3202 if (qfn
->real_names
[index
] == NULL
)
3203 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3205 return qfn
->real_names
[index
];
3208 static struct symtab
*
3209 dw2_find_last_source_symtab (struct objfile
*objfile
)
3211 struct dwarf2_per_objfile
*dwarf2_per_objfile
3212 = get_dwarf2_per_objfile (objfile
);
3213 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3214 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3219 return compunit_primary_filetab (cust
);
3222 /* Traversal function for dw2_forget_cached_source_info. */
3225 dw2_free_cached_file_names (void **slot
, void *info
)
3227 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3229 if (file_data
->real_names
)
3233 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3235 xfree ((void*) file_data
->real_names
[i
]);
3236 file_data
->real_names
[i
] = NULL
;
3244 dw2_forget_cached_source_info (struct objfile
*objfile
)
3246 struct dwarf2_per_objfile
*dwarf2_per_objfile
3247 = get_dwarf2_per_objfile (objfile
);
3249 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
.get (),
3250 dw2_free_cached_file_names
, NULL
);
3253 /* Helper function for dw2_map_symtabs_matching_filename that expands
3254 the symtabs and calls the iterator. */
3257 dw2_map_expand_apply (struct objfile
*objfile
,
3258 struct dwarf2_per_cu_data
*per_cu
,
3259 const char *name
, const char *real_path
,
3260 gdb::function_view
<bool (symtab
*)> callback
)
3262 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3264 /* Don't visit already-expanded CUs. */
3265 if (per_cu
->v
.quick
->compunit_symtab
)
3268 /* This may expand more than one symtab, and we want to iterate over
3270 dw2_instantiate_symtab (per_cu
, false);
3272 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3273 last_made
, callback
);
3276 /* Implementation of the map_symtabs_matching_filename method. */
3279 dw2_map_symtabs_matching_filename
3280 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3281 gdb::function_view
<bool (symtab
*)> callback
)
3283 const char *name_basename
= lbasename (name
);
3284 struct dwarf2_per_objfile
*dwarf2_per_objfile
3285 = get_dwarf2_per_objfile (objfile
);
3287 /* The rule is CUs specify all the files, including those used by
3288 any TU, so there's no need to scan TUs here. */
3290 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3292 /* We only need to look at symtabs not already expanded. */
3293 if (per_cu
->v
.quick
->compunit_symtab
)
3296 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3297 if (file_data
== NULL
)
3300 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3302 const char *this_name
= file_data
->file_names
[j
];
3303 const char *this_real_name
;
3305 if (compare_filenames_for_search (this_name
, name
))
3307 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3313 /* Before we invoke realpath, which can get expensive when many
3314 files are involved, do a quick comparison of the basenames. */
3315 if (! basenames_may_differ
3316 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3319 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3320 if (compare_filenames_for_search (this_real_name
, name
))
3322 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3328 if (real_path
!= NULL
)
3330 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3331 gdb_assert (IS_ABSOLUTE_PATH (name
));
3332 if (this_real_name
!= NULL
3333 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3335 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3347 /* Struct used to manage iterating over all CUs looking for a symbol. */
3349 struct dw2_symtab_iterator
3351 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3352 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3353 /* If set, only look for symbols that match that block. Valid values are
3354 GLOBAL_BLOCK and STATIC_BLOCK. */
3355 gdb::optional
<block_enum
> block_index
;
3356 /* The kind of symbol we're looking for. */
3358 /* The list of CUs from the index entry of the symbol,
3359 or NULL if not found. */
3361 /* The next element in VEC to look at. */
3363 /* The number of elements in VEC, or zero if there is no match. */
3365 /* Have we seen a global version of the symbol?
3366 If so we can ignore all further global instances.
3367 This is to work around gold/15646, inefficient gold-generated
3372 /* Initialize the index symtab iterator ITER. */
3375 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3376 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3377 gdb::optional
<block_enum
> block_index
,
3381 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3382 iter
->block_index
= block_index
;
3383 iter
->domain
= domain
;
3385 iter
->global_seen
= 0;
3387 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3389 /* index is NULL if OBJF_READNOW. */
3390 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3391 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3399 /* Return the next matching CU or NULL if there are no more. */
3401 static struct dwarf2_per_cu_data
*
3402 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3404 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3406 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3408 offset_type cu_index_and_attrs
=
3409 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3410 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3411 gdb_index_symbol_kind symbol_kind
=
3412 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3413 /* Only check the symbol attributes if they're present.
3414 Indices prior to version 7 don't record them,
3415 and indices >= 7 may elide them for certain symbols
3416 (gold does this). */
3418 (dwarf2_per_objfile
->index_table
->version
>= 7
3419 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3421 /* Don't crash on bad data. */
3422 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3423 + dwarf2_per_objfile
->all_type_units
.size ()))
3425 complaint (_(".gdb_index entry has bad CU index"
3427 objfile_name (dwarf2_per_objfile
->objfile
));
3431 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3433 /* Skip if already read in. */
3434 if (per_cu
->v
.quick
->compunit_symtab
)
3437 /* Check static vs global. */
3440 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3442 if (iter
->block_index
.has_value ())
3444 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3446 if (is_static
!= want_static
)
3450 /* Work around gold/15646. */
3451 if (!is_static
&& iter
->global_seen
)
3454 iter
->global_seen
= 1;
3457 /* Only check the symbol's kind if it has one. */
3460 switch (iter
->domain
)
3463 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3464 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3465 /* Some types are also in VAR_DOMAIN. */
3466 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3470 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3474 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3478 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3493 static struct compunit_symtab
*
3494 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3495 const char *name
, domain_enum domain
)
3497 struct compunit_symtab
*stab_best
= NULL
;
3498 struct dwarf2_per_objfile
*dwarf2_per_objfile
3499 = get_dwarf2_per_objfile (objfile
);
3501 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3503 struct dw2_symtab_iterator iter
;
3504 struct dwarf2_per_cu_data
*per_cu
;
3506 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
3508 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3510 struct symbol
*sym
, *with_opaque
= NULL
;
3511 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
3512 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3513 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3515 sym
= block_find_symbol (block
, name
, domain
,
3516 block_find_non_opaque_type_preferred
,
3519 /* Some caution must be observed with overloaded functions
3520 and methods, since the index will not contain any overload
3521 information (but NAME might contain it). */
3524 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3526 if (with_opaque
!= NULL
3527 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3530 /* Keep looking through other CUs. */
3537 dw2_print_stats (struct objfile
*objfile
)
3539 struct dwarf2_per_objfile
*dwarf2_per_objfile
3540 = get_dwarf2_per_objfile (objfile
);
3541 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
3542 + dwarf2_per_objfile
->all_type_units
.size ());
3545 for (int i
= 0; i
< total
; ++i
)
3547 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3549 if (!per_cu
->v
.quick
->compunit_symtab
)
3552 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3553 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3556 /* This dumps minimal information about the index.
3557 It is called via "mt print objfiles".
3558 One use is to verify .gdb_index has been loaded by the
3559 gdb.dwarf2/gdb-index.exp testcase. */
3562 dw2_dump (struct objfile
*objfile
)
3564 struct dwarf2_per_objfile
*dwarf2_per_objfile
3565 = get_dwarf2_per_objfile (objfile
);
3567 gdb_assert (dwarf2_per_objfile
->using_index
);
3568 printf_filtered (".gdb_index:");
3569 if (dwarf2_per_objfile
->index_table
!= NULL
)
3571 printf_filtered (" version %d\n",
3572 dwarf2_per_objfile
->index_table
->version
);
3575 printf_filtered (" faked for \"readnow\"\n");
3576 printf_filtered ("\n");
3580 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3581 const char *func_name
)
3583 struct dwarf2_per_objfile
*dwarf2_per_objfile
3584 = get_dwarf2_per_objfile (objfile
);
3586 struct dw2_symtab_iterator iter
;
3587 struct dwarf2_per_cu_data
*per_cu
;
3589 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
3591 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3592 dw2_instantiate_symtab (per_cu
, false);
3597 dw2_expand_all_symtabs (struct objfile
*objfile
)
3599 struct dwarf2_per_objfile
*dwarf2_per_objfile
3600 = get_dwarf2_per_objfile (objfile
);
3601 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
3602 + dwarf2_per_objfile
->all_type_units
.size ());
3604 for (int i
= 0; i
< total_units
; ++i
)
3606 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3608 /* We don't want to directly expand a partial CU, because if we
3609 read it with the wrong language, then assertion failures can
3610 be triggered later on. See PR symtab/23010. So, tell
3611 dw2_instantiate_symtab to skip partial CUs -- any important
3612 partial CU will be read via DW_TAG_imported_unit anyway. */
3613 dw2_instantiate_symtab (per_cu
, true);
3618 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3619 const char *fullname
)
3621 struct dwarf2_per_objfile
*dwarf2_per_objfile
3622 = get_dwarf2_per_objfile (objfile
);
3624 /* We don't need to consider type units here.
3625 This is only called for examining code, e.g. expand_line_sal.
3626 There can be an order of magnitude (or more) more type units
3627 than comp units, and we avoid them if we can. */
3629 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3631 /* We only need to look at symtabs not already expanded. */
3632 if (per_cu
->v
.quick
->compunit_symtab
)
3635 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3636 if (file_data
== NULL
)
3639 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3641 const char *this_fullname
= file_data
->file_names
[j
];
3643 if (filename_cmp (this_fullname
, fullname
) == 0)
3645 dw2_instantiate_symtab (per_cu
, false);
3653 dw2_map_matching_symbols
3654 (struct objfile
*objfile
,
3655 const lookup_name_info
&name
, domain_enum domain
,
3657 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3658 symbol_compare_ftype
*ordered_compare
)
3661 struct dwarf2_per_objfile
*dwarf2_per_objfile
3662 = get_dwarf2_per_objfile (objfile
);
3664 if (dwarf2_per_objfile
->index_table
!= nullptr)
3666 /* Ada currently doesn't support .gdb_index (see PR24713). We can get
3667 here though if the current language is Ada for a non-Ada objfile
3668 using GNU index. As Ada does not look for non-Ada symbols this
3669 function should just return. */
3673 /* We have -readnow: no .gdb_index, but no partial symtabs either. So,
3674 inline psym_map_matching_symbols here, assuming all partial symtabs have
3676 const int block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
3678 for (compunit_symtab
*cust
: objfile
->compunits ())
3680 const struct block
*block
;
3684 block
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
3685 if (!iterate_over_symbols_terminated (block
, name
,
3691 /* Starting from a search name, return the string that finds the upper
3692 bound of all strings that start with SEARCH_NAME in a sorted name
3693 list. Returns the empty string to indicate that the upper bound is
3694 the end of the list. */
3697 make_sort_after_prefix_name (const char *search_name
)
3699 /* When looking to complete "func", we find the upper bound of all
3700 symbols that start with "func" by looking for where we'd insert
3701 the closest string that would follow "func" in lexicographical
3702 order. Usually, that's "func"-with-last-character-incremented,
3703 i.e. "fund". Mind non-ASCII characters, though. Usually those
3704 will be UTF-8 multi-byte sequences, but we can't be certain.
3705 Especially mind the 0xff character, which is a valid character in
3706 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3707 rule out compilers allowing it in identifiers. Note that
3708 conveniently, strcmp/strcasecmp are specified to compare
3709 characters interpreted as unsigned char. So what we do is treat
3710 the whole string as a base 256 number composed of a sequence of
3711 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3712 to 0, and carries 1 to the following more-significant position.
3713 If the very first character in SEARCH_NAME ends up incremented
3714 and carries/overflows, then the upper bound is the end of the
3715 list. The string after the empty string is also the empty
3718 Some examples of this operation:
3720 SEARCH_NAME => "+1" RESULT
3724 "\xff" "a" "\xff" => "\xff" "b"
3729 Then, with these symbols for example:
3735 completing "func" looks for symbols between "func" and
3736 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
3737 which finds "func" and "func1", but not "fund".
3741 funcÿ (Latin1 'ÿ' [0xff])
3745 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
3746 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
3750 ÿÿ (Latin1 'ÿ' [0xff])
3753 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
3754 the end of the list.
3756 std::string after
= search_name
;
3757 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
3759 if (!after
.empty ())
3760 after
.back () = (unsigned char) after
.back () + 1;
3764 /* See declaration. */
3766 std::pair
<std::vector
<name_component
>::const_iterator
,
3767 std::vector
<name_component
>::const_iterator
>
3768 mapped_index_base::find_name_components_bounds
3769 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
3772 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3774 const char *lang_name
3775 = lookup_name_without_params
.language_lookup_name (lang
);
3777 /* Comparison function object for lower_bound that matches against a
3778 given symbol name. */
3779 auto lookup_compare_lower
= [&] (const name_component
&elem
,
3782 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3783 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3784 return name_cmp (elem_name
, name
) < 0;
3787 /* Comparison function object for upper_bound that matches against a
3788 given symbol name. */
3789 auto lookup_compare_upper
= [&] (const char *name
,
3790 const name_component
&elem
)
3792 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3793 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3794 return name_cmp (name
, elem_name
) < 0;
3797 auto begin
= this->name_components
.begin ();
3798 auto end
= this->name_components
.end ();
3800 /* Find the lower bound. */
3803 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
3806 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
3809 /* Find the upper bound. */
3812 if (lookup_name_without_params
.completion_mode ())
3814 /* In completion mode, we want UPPER to point past all
3815 symbols names that have the same prefix. I.e., with
3816 these symbols, and completing "func":
3818 function << lower bound
3820 other_function << upper bound
3822 We find the upper bound by looking for the insertion
3823 point of "func"-with-last-character-incremented,
3825 std::string after
= make_sort_after_prefix_name (lang_name
);
3828 return std::lower_bound (lower
, end
, after
.c_str (),
3829 lookup_compare_lower
);
3832 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
3835 return {lower
, upper
};
3838 /* See declaration. */
3841 mapped_index_base::build_name_components ()
3843 if (!this->name_components
.empty ())
3846 this->name_components_casing
= case_sensitivity
;
3848 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3850 /* The code below only knows how to break apart components of C++
3851 symbol names (and other languages that use '::' as
3852 namespace/module separator) and Ada symbol names. */
3853 auto count
= this->symbol_name_count ();
3854 for (offset_type idx
= 0; idx
< count
; idx
++)
3856 if (this->symbol_name_slot_invalid (idx
))
3859 const char *name
= this->symbol_name_at (idx
);
3861 /* Add each name component to the name component table. */
3862 unsigned int previous_len
= 0;
3864 if (strstr (name
, "::") != nullptr)
3866 for (unsigned int current_len
= cp_find_first_component (name
);
3867 name
[current_len
] != '\0';
3868 current_len
+= cp_find_first_component (name
+ current_len
))
3870 gdb_assert (name
[current_len
] == ':');
3871 this->name_components
.push_back ({previous_len
, idx
});
3872 /* Skip the '::'. */
3874 previous_len
= current_len
;
3879 /* Handle the Ada encoded (aka mangled) form here. */
3880 for (const char *iter
= strstr (name
, "__");
3882 iter
= strstr (iter
, "__"))
3884 this->name_components
.push_back ({previous_len
, idx
});
3886 previous_len
= iter
- name
;
3890 this->name_components
.push_back ({previous_len
, idx
});
3893 /* Sort name_components elements by name. */
3894 auto name_comp_compare
= [&] (const name_component
&left
,
3895 const name_component
&right
)
3897 const char *left_qualified
= this->symbol_name_at (left
.idx
);
3898 const char *right_qualified
= this->symbol_name_at (right
.idx
);
3900 const char *left_name
= left_qualified
+ left
.name_offset
;
3901 const char *right_name
= right_qualified
+ right
.name_offset
;
3903 return name_cmp (left_name
, right_name
) < 0;
3906 std::sort (this->name_components
.begin (),
3907 this->name_components
.end (),
3911 /* Helper for dw2_expand_symtabs_matching that works with a
3912 mapped_index_base instead of the containing objfile. This is split
3913 to a separate function in order to be able to unit test the
3914 name_components matching using a mock mapped_index_base. For each
3915 symbol name that matches, calls MATCH_CALLBACK, passing it the
3916 symbol's index in the mapped_index_base symbol table. */
3919 dw2_expand_symtabs_matching_symbol
3920 (mapped_index_base
&index
,
3921 const lookup_name_info
&lookup_name_in
,
3922 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3923 enum search_domain kind
,
3924 gdb::function_view
<bool (offset_type
)> match_callback
)
3926 lookup_name_info lookup_name_without_params
3927 = lookup_name_in
.make_ignore_params ();
3929 /* Build the symbol name component sorted vector, if we haven't
3931 index
.build_name_components ();
3933 /* The same symbol may appear more than once in the range though.
3934 E.g., if we're looking for symbols that complete "w", and we have
3935 a symbol named "w1::w2", we'll find the two name components for
3936 that same symbol in the range. To be sure we only call the
3937 callback once per symbol, we first collect the symbol name
3938 indexes that matched in a temporary vector and ignore
3940 std::vector
<offset_type
> matches
;
3942 struct name_and_matcher
3944 symbol_name_matcher_ftype
*matcher
;
3947 bool operator== (const name_and_matcher
&other
) const
3949 return matcher
== other
.matcher
&& strcmp (name
, other
.name
) == 0;
3953 /* A vector holding all the different symbol name matchers, for all
3955 std::vector
<name_and_matcher
> matchers
;
3957 for (int i
= 0; i
< nr_languages
; i
++)
3959 enum language lang_e
= (enum language
) i
;
3961 const language_defn
*lang
= language_def (lang_e
);
3962 symbol_name_matcher_ftype
*name_matcher
3963 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
3965 name_and_matcher key
{
3967 lookup_name_without_params
.language_lookup_name (lang_e
)
3970 /* Don't insert the same comparison routine more than once.
3971 Note that we do this linear walk. This is not a problem in
3972 practice because the number of supported languages is
3974 if (std::find (matchers
.begin (), matchers
.end (), key
)
3977 matchers
.push_back (std::move (key
));
3980 = index
.find_name_components_bounds (lookup_name_without_params
,
3983 /* Now for each symbol name in range, check to see if we have a name
3984 match, and if so, call the MATCH_CALLBACK callback. */
3986 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
3988 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
3990 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
3991 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
3994 matches
.push_back (bounds
.first
->idx
);
3998 std::sort (matches
.begin (), matches
.end ());
4000 /* Finally call the callback, once per match. */
4002 for (offset_type idx
: matches
)
4006 if (!match_callback (idx
))
4012 /* Above we use a type wider than idx's for 'prev', since 0 and
4013 (offset_type)-1 are both possible values. */
4014 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4019 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4021 /* A mock .gdb_index/.debug_names-like name index table, enough to
4022 exercise dw2_expand_symtabs_matching_symbol, which works with the
4023 mapped_index_base interface. Builds an index from the symbol list
4024 passed as parameter to the constructor. */
4025 class mock_mapped_index
: public mapped_index_base
4028 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4029 : m_symbol_table (symbols
)
4032 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4034 /* Return the number of names in the symbol table. */
4035 size_t symbol_name_count () const override
4037 return m_symbol_table
.size ();
4040 /* Get the name of the symbol at IDX in the symbol table. */
4041 const char *symbol_name_at (offset_type idx
) const override
4043 return m_symbol_table
[idx
];
4047 gdb::array_view
<const char *> m_symbol_table
;
4050 /* Convenience function that converts a NULL pointer to a "<null>"
4051 string, to pass to print routines. */
4054 string_or_null (const char *str
)
4056 return str
!= NULL
? str
: "<null>";
4059 /* Check if a lookup_name_info built from
4060 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4061 index. EXPECTED_LIST is the list of expected matches, in expected
4062 matching order. If no match expected, then an empty list is
4063 specified. Returns true on success. On failure prints a warning
4064 indicating the file:line that failed, and returns false. */
4067 check_match (const char *file
, int line
,
4068 mock_mapped_index
&mock_index
,
4069 const char *name
, symbol_name_match_type match_type
,
4070 bool completion_mode
,
4071 std::initializer_list
<const char *> expected_list
)
4073 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4075 bool matched
= true;
4077 auto mismatch
= [&] (const char *expected_str
,
4080 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4081 "expected=\"%s\", got=\"%s\"\n"),
4083 (match_type
== symbol_name_match_type::FULL
4085 name
, string_or_null (expected_str
), string_or_null (got
));
4089 auto expected_it
= expected_list
.begin ();
4090 auto expected_end
= expected_list
.end ();
4092 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4094 [&] (offset_type idx
)
4096 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4097 const char *expected_str
4098 = expected_it
== expected_end
? NULL
: *expected_it
++;
4100 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4101 mismatch (expected_str
, matched_name
);
4105 const char *expected_str
4106 = expected_it
== expected_end
? NULL
: *expected_it
++;
4107 if (expected_str
!= NULL
)
4108 mismatch (expected_str
, NULL
);
4113 /* The symbols added to the mock mapped_index for testing (in
4115 static const char *test_symbols
[] = {
4124 "ns2::tmpl<int>::foo2",
4125 "(anonymous namespace)::A::B::C",
4127 /* These are used to check that the increment-last-char in the
4128 matching algorithm for completion doesn't match "t1_fund" when
4129 completing "t1_func". */
4135 /* A UTF-8 name with multi-byte sequences to make sure that
4136 cp-name-parser understands this as a single identifier ("função"
4137 is "function" in PT). */
4140 /* \377 (0xff) is Latin1 'ÿ'. */
4143 /* \377 (0xff) is Latin1 'ÿ'. */
4147 /* A name with all sorts of complications. Starts with "z" to make
4148 it easier for the completion tests below. */
4149 #define Z_SYM_NAME \
4150 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4151 "::tuple<(anonymous namespace)::ui*, " \
4152 "std::default_delete<(anonymous namespace)::ui>, void>"
4157 /* Returns true if the mapped_index_base::find_name_component_bounds
4158 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4159 in completion mode. */
4162 check_find_bounds_finds (mapped_index_base
&index
,
4163 const char *search_name
,
4164 gdb::array_view
<const char *> expected_syms
)
4166 lookup_name_info
lookup_name (search_name
,
4167 symbol_name_match_type::FULL
, true);
4169 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4172 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4173 if (distance
!= expected_syms
.size ())
4176 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4178 auto nc_elem
= bounds
.first
+ exp_elem
;
4179 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4180 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4187 /* Test the lower-level mapped_index::find_name_component_bounds
4191 test_mapped_index_find_name_component_bounds ()
4193 mock_mapped_index
mock_index (test_symbols
);
4195 mock_index
.build_name_components ();
4197 /* Test the lower-level mapped_index::find_name_component_bounds
4198 method in completion mode. */
4200 static const char *expected_syms
[] = {
4205 SELF_CHECK (check_find_bounds_finds (mock_index
,
4206 "t1_func", expected_syms
));
4209 /* Check that the increment-last-char in the name matching algorithm
4210 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4212 static const char *expected_syms1
[] = {
4216 SELF_CHECK (check_find_bounds_finds (mock_index
,
4217 "\377", expected_syms1
));
4219 static const char *expected_syms2
[] = {
4222 SELF_CHECK (check_find_bounds_finds (mock_index
,
4223 "\377\377", expected_syms2
));
4227 /* Test dw2_expand_symtabs_matching_symbol. */
4230 test_dw2_expand_symtabs_matching_symbol ()
4232 mock_mapped_index
mock_index (test_symbols
);
4234 /* We let all tests run until the end even if some fails, for debug
4236 bool any_mismatch
= false;
4238 /* Create the expected symbols list (an initializer_list). Needed
4239 because lists have commas, and we need to pass them to CHECK,
4240 which is a macro. */
4241 #define EXPECT(...) { __VA_ARGS__ }
4243 /* Wrapper for check_match that passes down the current
4244 __FILE__/__LINE__. */
4245 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4246 any_mismatch |= !check_match (__FILE__, __LINE__, \
4248 NAME, MATCH_TYPE, COMPLETION_MODE, \
4251 /* Identity checks. */
4252 for (const char *sym
: test_symbols
)
4254 /* Should be able to match all existing symbols. */
4255 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4258 /* Should be able to match all existing symbols with
4260 std::string with_params
= std::string (sym
) + "(int)";
4261 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4264 /* Should be able to match all existing symbols with
4265 parameters and qualifiers. */
4266 with_params
= std::string (sym
) + " ( int ) const";
4267 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4270 /* This should really find sym, but cp-name-parser.y doesn't
4271 know about lvalue/rvalue qualifiers yet. */
4272 with_params
= std::string (sym
) + " ( int ) &&";
4273 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4277 /* Check that the name matching algorithm for completion doesn't get
4278 confused with Latin1 'ÿ' / 0xff. */
4280 static const char str
[] = "\377";
4281 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4282 EXPECT ("\377", "\377\377123"));
4285 /* Check that the increment-last-char in the matching algorithm for
4286 completion doesn't match "t1_fund" when completing "t1_func". */
4288 static const char str
[] = "t1_func";
4289 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4290 EXPECT ("t1_func", "t1_func1"));
4293 /* Check that completion mode works at each prefix of the expected
4296 static const char str
[] = "function(int)";
4297 size_t len
= strlen (str
);
4300 for (size_t i
= 1; i
< len
; i
++)
4302 lookup
.assign (str
, i
);
4303 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4304 EXPECT ("function"));
4308 /* While "w" is a prefix of both components, the match function
4309 should still only be called once. */
4311 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4313 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4317 /* Same, with a "complicated" symbol. */
4319 static const char str
[] = Z_SYM_NAME
;
4320 size_t len
= strlen (str
);
4323 for (size_t i
= 1; i
< len
; i
++)
4325 lookup
.assign (str
, i
);
4326 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4327 EXPECT (Z_SYM_NAME
));
4331 /* In FULL mode, an incomplete symbol doesn't match. */
4333 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4337 /* A complete symbol with parameters matches any overload, since the
4338 index has no overload info. */
4340 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4341 EXPECT ("std::zfunction", "std::zfunction2"));
4342 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4343 EXPECT ("std::zfunction", "std::zfunction2"));
4344 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4345 EXPECT ("std::zfunction", "std::zfunction2"));
4348 /* Check that whitespace is ignored appropriately. A symbol with a
4349 template argument list. */
4351 static const char expected
[] = "ns::foo<int>";
4352 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4354 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4358 /* Check that whitespace is ignored appropriately. A symbol with a
4359 template argument list that includes a pointer. */
4361 static const char expected
[] = "ns::foo<char*>";
4362 /* Try both completion and non-completion modes. */
4363 static const bool completion_mode
[2] = {false, true};
4364 for (size_t i
= 0; i
< 2; i
++)
4366 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4367 completion_mode
[i
], EXPECT (expected
));
4368 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4369 completion_mode
[i
], EXPECT (expected
));
4371 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4372 completion_mode
[i
], EXPECT (expected
));
4373 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4374 completion_mode
[i
], EXPECT (expected
));
4379 /* Check method qualifiers are ignored. */
4380 static const char expected
[] = "ns::foo<char*>";
4381 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4382 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4383 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4384 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4385 CHECK_MATCH ("foo < char * > ( int ) const",
4386 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4387 CHECK_MATCH ("foo < char * > ( int ) &&",
4388 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4391 /* Test lookup names that don't match anything. */
4393 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4396 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4400 /* Some wild matching tests, exercising "(anonymous namespace)",
4401 which should not be confused with a parameter list. */
4403 static const char *syms
[] = {
4407 "A :: B :: C ( int )",
4412 for (const char *s
: syms
)
4414 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4415 EXPECT ("(anonymous namespace)::A::B::C"));
4420 static const char expected
[] = "ns2::tmpl<int>::foo2";
4421 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4423 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4427 SELF_CHECK (!any_mismatch
);
4436 test_mapped_index_find_name_component_bounds ();
4437 test_dw2_expand_symtabs_matching_symbol ();
4440 }} // namespace selftests::dw2_expand_symtabs_matching
4442 #endif /* GDB_SELF_TEST */
4444 /* If FILE_MATCHER is NULL or if PER_CU has
4445 dwarf2_per_cu_quick_data::MARK set (see
4446 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4447 EXPANSION_NOTIFY on it. */
4450 dw2_expand_symtabs_matching_one
4451 (struct dwarf2_per_cu_data
*per_cu
,
4452 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4453 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4455 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4457 bool symtab_was_null
4458 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4460 dw2_instantiate_symtab (per_cu
, false);
4462 if (expansion_notify
!= NULL
4464 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4465 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4469 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4470 matched, to expand corresponding CUs that were marked. IDX is the
4471 index of the symbol name that matched. */
4474 dw2_expand_marked_cus
4475 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
4476 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4477 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4480 offset_type
*vec
, vec_len
, vec_idx
;
4481 bool global_seen
= false;
4482 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4484 vec
= (offset_type
*) (index
.constant_pool
4485 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4486 vec_len
= MAYBE_SWAP (vec
[0]);
4487 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4489 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4490 /* This value is only valid for index versions >= 7. */
4491 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4492 gdb_index_symbol_kind symbol_kind
=
4493 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4494 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4495 /* Only check the symbol attributes if they're present.
4496 Indices prior to version 7 don't record them,
4497 and indices >= 7 may elide them for certain symbols
4498 (gold does this). */
4501 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4503 /* Work around gold/15646. */
4506 if (!is_static
&& global_seen
)
4512 /* Only check the symbol's kind if it has one. */
4517 case VARIABLES_DOMAIN
:
4518 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4521 case FUNCTIONS_DOMAIN
:
4522 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4526 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4529 case MODULES_DOMAIN
:
4530 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4538 /* Don't crash on bad data. */
4539 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
4540 + dwarf2_per_objfile
->all_type_units
.size ()))
4542 complaint (_(".gdb_index entry has bad CU index"
4544 objfile_name (dwarf2_per_objfile
->objfile
));
4548 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
4549 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4554 /* If FILE_MATCHER is non-NULL, set all the
4555 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4556 that match FILE_MATCHER. */
4559 dw_expand_symtabs_matching_file_matcher
4560 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4561 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4563 if (file_matcher
== NULL
)
4566 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
4568 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4570 NULL
, xcalloc
, xfree
));
4571 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4573 NULL
, xcalloc
, xfree
));
4575 /* The rule is CUs specify all the files, including those used by
4576 any TU, so there's no need to scan TUs here. */
4578 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4582 per_cu
->v
.quick
->mark
= 0;
4584 /* We only need to look at symtabs not already expanded. */
4585 if (per_cu
->v
.quick
->compunit_symtab
)
4588 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4589 if (file_data
== NULL
)
4592 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4594 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4596 per_cu
->v
.quick
->mark
= 1;
4600 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4602 const char *this_real_name
;
4604 if (file_matcher (file_data
->file_names
[j
], false))
4606 per_cu
->v
.quick
->mark
= 1;
4610 /* Before we invoke realpath, which can get expensive when many
4611 files are involved, do a quick comparison of the basenames. */
4612 if (!basenames_may_differ
4613 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4617 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4618 if (file_matcher (this_real_name
, false))
4620 per_cu
->v
.quick
->mark
= 1;
4625 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4626 ? visited_found
.get ()
4627 : visited_not_found
.get (),
4634 dw2_expand_symtabs_matching
4635 (struct objfile
*objfile
,
4636 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4637 const lookup_name_info
*lookup_name
,
4638 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4639 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4640 enum search_domain kind
)
4642 struct dwarf2_per_objfile
*dwarf2_per_objfile
4643 = get_dwarf2_per_objfile (objfile
);
4645 /* index_table is NULL if OBJF_READNOW. */
4646 if (!dwarf2_per_objfile
->index_table
)
4649 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
4651 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
4653 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4657 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4663 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4665 dw2_expand_symtabs_matching_symbol (index
, *lookup_name
,
4667 kind
, [&] (offset_type idx
)
4669 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
4670 expansion_notify
, kind
);
4675 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4678 static struct compunit_symtab
*
4679 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4684 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4685 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4688 if (cust
->includes
== NULL
)
4691 for (i
= 0; cust
->includes
[i
]; ++i
)
4693 struct compunit_symtab
*s
= cust
->includes
[i
];
4695 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4703 static struct compunit_symtab
*
4704 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4705 struct bound_minimal_symbol msymbol
,
4707 struct obj_section
*section
,
4710 struct dwarf2_per_cu_data
*data
;
4711 struct compunit_symtab
*result
;
4713 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
4716 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
4717 data
= (struct dwarf2_per_cu_data
*) addrmap_find
4718 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
4722 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4723 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4724 paddress (objfile
->arch (), pc
));
4727 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
4730 gdb_assert (result
!= NULL
);
4735 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4736 void *data
, int need_fullname
)
4738 struct dwarf2_per_objfile
*dwarf2_per_objfile
4739 = get_dwarf2_per_objfile (objfile
);
4741 if (!dwarf2_per_objfile
->filenames_cache
)
4743 dwarf2_per_objfile
->filenames_cache
.emplace ();
4745 htab_up
visited (htab_create_alloc (10,
4746 htab_hash_pointer
, htab_eq_pointer
,
4747 NULL
, xcalloc
, xfree
));
4749 /* The rule is CUs specify all the files, including those used
4750 by any TU, so there's no need to scan TUs here. We can
4751 ignore file names coming from already-expanded CUs. */
4753 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4755 if (per_cu
->v
.quick
->compunit_symtab
)
4757 void **slot
= htab_find_slot (visited
.get (),
4758 per_cu
->v
.quick
->file_names
,
4761 *slot
= per_cu
->v
.quick
->file_names
;
4765 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4767 /* We only need to look at symtabs not already expanded. */
4768 if (per_cu
->v
.quick
->compunit_symtab
)
4771 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4772 if (file_data
== NULL
)
4775 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4778 /* Already visited. */
4783 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4785 const char *filename
= file_data
->file_names
[j
];
4786 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
4791 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
4793 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4796 this_real_name
= gdb_realpath (filename
);
4797 (*fun
) (filename
, this_real_name
.get (), data
);
4802 dw2_has_symbols (struct objfile
*objfile
)
4807 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4810 dw2_find_last_source_symtab
,
4811 dw2_forget_cached_source_info
,
4812 dw2_map_symtabs_matching_filename
,
4817 dw2_expand_symtabs_for_function
,
4818 dw2_expand_all_symtabs
,
4819 dw2_expand_symtabs_with_fullname
,
4820 dw2_map_matching_symbols
,
4821 dw2_expand_symtabs_matching
,
4822 dw2_find_pc_sect_compunit_symtab
,
4824 dw2_map_symbol_filenames
4827 /* DWARF-5 debug_names reader. */
4829 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
4830 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
4832 /* A helper function that reads the .debug_names section in SECTION
4833 and fills in MAP. FILENAME is the name of the file containing the
4834 section; it is used for error reporting.
4836 Returns true if all went well, false otherwise. */
4839 read_debug_names_from_section (struct objfile
*objfile
,
4840 const char *filename
,
4841 struct dwarf2_section_info
*section
,
4842 mapped_debug_names
&map
)
4844 if (section
->empty ())
4847 /* Older elfutils strip versions could keep the section in the main
4848 executable while splitting it for the separate debug info file. */
4849 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
4852 section
->read (objfile
);
4854 map
.dwarf5_byte_order
= gdbarch_byte_order (objfile
->arch ());
4856 const gdb_byte
*addr
= section
->buffer
;
4858 bfd
*const abfd
= section
->get_bfd_owner ();
4860 unsigned int bytes_read
;
4861 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
4864 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
4865 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
4866 if (bytes_read
+ length
!= section
->size
)
4868 /* There may be multiple per-CU indices. */
4869 warning (_("Section .debug_names in %s length %s does not match "
4870 "section length %s, ignoring .debug_names."),
4871 filename
, plongest (bytes_read
+ length
),
4872 pulongest (section
->size
));
4876 /* The version number. */
4877 uint16_t version
= read_2_bytes (abfd
, addr
);
4881 warning (_("Section .debug_names in %s has unsupported version %d, "
4882 "ignoring .debug_names."),
4888 uint16_t padding
= read_2_bytes (abfd
, addr
);
4892 warning (_("Section .debug_names in %s has unsupported padding %d, "
4893 "ignoring .debug_names."),
4898 /* comp_unit_count - The number of CUs in the CU list. */
4899 map
.cu_count
= read_4_bytes (abfd
, addr
);
4902 /* local_type_unit_count - The number of TUs in the local TU
4904 map
.tu_count
= read_4_bytes (abfd
, addr
);
4907 /* foreign_type_unit_count - The number of TUs in the foreign TU
4909 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
4911 if (foreign_tu_count
!= 0)
4913 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
4914 "ignoring .debug_names."),
4915 filename
, static_cast<unsigned long> (foreign_tu_count
));
4919 /* bucket_count - The number of hash buckets in the hash lookup
4921 map
.bucket_count
= read_4_bytes (abfd
, addr
);
4924 /* name_count - The number of unique names in the index. */
4925 map
.name_count
= read_4_bytes (abfd
, addr
);
4928 /* abbrev_table_size - The size in bytes of the abbreviations
4930 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
4933 /* augmentation_string_size - The size in bytes of the augmentation
4934 string. This value is rounded up to a multiple of 4. */
4935 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
4937 map
.augmentation_is_gdb
= ((augmentation_string_size
4938 == sizeof (dwarf5_augmentation
))
4939 && memcmp (addr
, dwarf5_augmentation
,
4940 sizeof (dwarf5_augmentation
)) == 0);
4941 augmentation_string_size
+= (-augmentation_string_size
) & 3;
4942 addr
+= augmentation_string_size
;
4945 map
.cu_table_reordered
= addr
;
4946 addr
+= map
.cu_count
* map
.offset_size
;
4948 /* List of Local TUs */
4949 map
.tu_table_reordered
= addr
;
4950 addr
+= map
.tu_count
* map
.offset_size
;
4952 /* Hash Lookup Table */
4953 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
4954 addr
+= map
.bucket_count
* 4;
4955 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
4956 addr
+= map
.name_count
* 4;
4959 map
.name_table_string_offs_reordered
= addr
;
4960 addr
+= map
.name_count
* map
.offset_size
;
4961 map
.name_table_entry_offs_reordered
= addr
;
4962 addr
+= map
.name_count
* map
.offset_size
;
4964 const gdb_byte
*abbrev_table_start
= addr
;
4967 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4972 const auto insertpair
4973 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
4974 if (!insertpair
.second
)
4976 warning (_("Section .debug_names in %s has duplicate index %s, "
4977 "ignoring .debug_names."),
4978 filename
, pulongest (index_num
));
4981 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
4982 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4987 mapped_debug_names::index_val::attr attr
;
4988 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4990 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4992 if (attr
.form
== DW_FORM_implicit_const
)
4994 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
4998 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5000 indexval
.attr_vec
.push_back (std::move (attr
));
5003 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5005 warning (_("Section .debug_names in %s has abbreviation_table "
5006 "of size %s vs. written as %u, ignoring .debug_names."),
5007 filename
, plongest (addr
- abbrev_table_start
),
5011 map
.entry_pool
= addr
;
5016 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5020 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5021 const mapped_debug_names
&map
,
5022 dwarf2_section_info
§ion
,
5025 if (!map
.augmentation_is_gdb
)
5027 for (uint32_t i
= 0; i
< map
.cu_count
; ++i
)
5029 sect_offset sect_off
5030 = (sect_offset
) (extract_unsigned_integer
5031 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5033 map
.dwarf5_byte_order
));
5034 /* We don't know the length of the CU, because the CU list in a
5035 .debug_names index can be incomplete, so we can't use the start of
5036 the next CU as end of this CU. We create the CUs here with length 0,
5037 and in cutu_reader::cutu_reader we'll fill in the actual length. */
5038 dwarf2_per_cu_data
*per_cu
5039 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5041 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5045 sect_offset sect_off_prev
;
5046 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5048 sect_offset sect_off_next
;
5049 if (i
< map
.cu_count
)
5052 = (sect_offset
) (extract_unsigned_integer
5053 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5055 map
.dwarf5_byte_order
));
5058 sect_off_next
= (sect_offset
) section
.size
;
5061 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5062 dwarf2_per_cu_data
*per_cu
5063 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5064 sect_off_prev
, length
);
5065 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5067 sect_off_prev
= sect_off_next
;
5071 /* Read the CU list from the mapped index, and use it to create all
5072 the CU objects for this dwarf2_per_objfile. */
5075 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5076 const mapped_debug_names
&map
,
5077 const mapped_debug_names
&dwz_map
)
5079 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5080 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5082 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5083 dwarf2_per_objfile
->info
,
5084 false /* is_dwz */);
5086 if (dwz_map
.cu_count
== 0)
5089 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5090 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5094 /* Read .debug_names. If everything went ok, initialize the "quick"
5095 elements of all the CUs and return true. Otherwise, return false. */
5098 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5100 std::unique_ptr
<mapped_debug_names
> map
5101 (new mapped_debug_names (dwarf2_per_objfile
));
5102 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5103 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5105 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5106 &dwarf2_per_objfile
->debug_names
,
5110 /* Don't use the index if it's empty. */
5111 if (map
->name_count
== 0)
5114 /* If there is a .dwz file, read it so we can get its CU list as
5116 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5119 if (!read_debug_names_from_section (objfile
,
5120 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5121 &dwz
->debug_names
, dwz_map
))
5123 warning (_("could not read '.debug_names' section from %s; skipping"),
5124 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5129 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5131 if (map
->tu_count
!= 0)
5133 /* We can only handle a single .debug_types when we have an
5135 if (dwarf2_per_objfile
->types
.size () != 1)
5138 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
5140 create_signatured_type_table_from_debug_names
5141 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5144 create_addrmap_from_aranges (dwarf2_per_objfile
,
5145 &dwarf2_per_objfile
->debug_aranges
);
5147 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5148 dwarf2_per_objfile
->using_index
= 1;
5149 dwarf2_per_objfile
->quick_file_names_table
=
5150 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5155 /* Type used to manage iterating over all CUs looking for a symbol for
5158 class dw2_debug_names_iterator
5161 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5162 gdb::optional
<block_enum
> block_index
,
5165 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5166 m_addr (find_vec_in_debug_names (map
, name
))
5169 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5170 search_domain search
, uint32_t namei
)
5173 m_addr (find_vec_in_debug_names (map
, namei
))
5176 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5177 block_enum block_index
, domain_enum domain
,
5179 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5180 m_addr (find_vec_in_debug_names (map
, namei
))
5183 /* Return the next matching CU or NULL if there are no more. */
5184 dwarf2_per_cu_data
*next ();
5187 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5189 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5192 /* The internalized form of .debug_names. */
5193 const mapped_debug_names
&m_map
;
5195 /* If set, only look for symbols that match that block. Valid values are
5196 GLOBAL_BLOCK and STATIC_BLOCK. */
5197 const gdb::optional
<block_enum
> m_block_index
;
5199 /* The kind of symbol we're looking for. */
5200 const domain_enum m_domain
= UNDEF_DOMAIN
;
5201 const search_domain m_search
= ALL_DOMAIN
;
5203 /* The list of CUs from the index entry of the symbol, or NULL if
5205 const gdb_byte
*m_addr
;
5209 mapped_debug_names::namei_to_name (uint32_t namei
) const
5211 const ULONGEST namei_string_offs
5212 = extract_unsigned_integer ((name_table_string_offs_reordered
5213 + namei
* offset_size
),
5216 return read_indirect_string_at_offset (dwarf2_per_objfile
,
5220 /* Find a slot in .debug_names for the object named NAME. If NAME is
5221 found, return pointer to its pool data. If NAME cannot be found,
5225 dw2_debug_names_iterator::find_vec_in_debug_names
5226 (const mapped_debug_names
&map
, const char *name
)
5228 int (*cmp
) (const char *, const char *);
5230 gdb::unique_xmalloc_ptr
<char> without_params
;
5231 if (current_language
->la_language
== language_cplus
5232 || current_language
->la_language
== language_fortran
5233 || current_language
->la_language
== language_d
)
5235 /* NAME is already canonical. Drop any qualifiers as
5236 .debug_names does not contain any. */
5238 if (strchr (name
, '(') != NULL
)
5240 without_params
= cp_remove_params (name
);
5241 if (without_params
!= NULL
)
5242 name
= without_params
.get ();
5246 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5248 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5250 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5251 (map
.bucket_table_reordered
5252 + (full_hash
% map
.bucket_count
)), 4,
5253 map
.dwarf5_byte_order
);
5257 if (namei
>= map
.name_count
)
5259 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5261 namei
, map
.name_count
,
5262 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5268 const uint32_t namei_full_hash
5269 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5270 (map
.hash_table_reordered
+ namei
), 4,
5271 map
.dwarf5_byte_order
);
5272 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5275 if (full_hash
== namei_full_hash
)
5277 const char *const namei_string
= map
.namei_to_name (namei
);
5279 #if 0 /* An expensive sanity check. */
5280 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5282 complaint (_("Wrong .debug_names hash for string at index %u "
5284 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5289 if (cmp (namei_string
, name
) == 0)
5291 const ULONGEST namei_entry_offs
5292 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5293 + namei
* map
.offset_size
),
5294 map
.offset_size
, map
.dwarf5_byte_order
);
5295 return map
.entry_pool
+ namei_entry_offs
;
5300 if (namei
>= map
.name_count
)
5306 dw2_debug_names_iterator::find_vec_in_debug_names
5307 (const mapped_debug_names
&map
, uint32_t namei
)
5309 if (namei
>= map
.name_count
)
5311 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5313 namei
, map
.name_count
,
5314 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5318 const ULONGEST namei_entry_offs
5319 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5320 + namei
* map
.offset_size
),
5321 map
.offset_size
, map
.dwarf5_byte_order
);
5322 return map
.entry_pool
+ namei_entry_offs
;
5325 /* See dw2_debug_names_iterator. */
5327 dwarf2_per_cu_data
*
5328 dw2_debug_names_iterator::next ()
5333 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5334 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5335 bfd
*const abfd
= objfile
->obfd
;
5339 unsigned int bytes_read
;
5340 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5341 m_addr
+= bytes_read
;
5345 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5346 if (indexval_it
== m_map
.abbrev_map
.cend ())
5348 complaint (_("Wrong .debug_names undefined abbrev code %s "
5350 pulongest (abbrev
), objfile_name (objfile
));
5353 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5354 enum class symbol_linkage
{
5358 } symbol_linkage_
= symbol_linkage::unknown
;
5359 dwarf2_per_cu_data
*per_cu
= NULL
;
5360 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5365 case DW_FORM_implicit_const
:
5366 ull
= attr
.implicit_const
;
5368 case DW_FORM_flag_present
:
5372 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5373 m_addr
+= bytes_read
;
5376 ull
= read_4_bytes (abfd
, m_addr
);
5380 ull
= read_8_bytes (abfd
, m_addr
);
5383 case DW_FORM_ref_sig8
:
5384 ull
= read_8_bytes (abfd
, m_addr
);
5388 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5389 dwarf_form_name (attr
.form
),
5390 objfile_name (objfile
));
5393 switch (attr
.dw_idx
)
5395 case DW_IDX_compile_unit
:
5396 /* Don't crash on bad data. */
5397 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5399 complaint (_(".debug_names entry has bad CU index %s"
5402 objfile_name (dwarf2_per_objfile
->objfile
));
5405 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5407 case DW_IDX_type_unit
:
5408 /* Don't crash on bad data. */
5409 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5411 complaint (_(".debug_names entry has bad TU index %s"
5414 objfile_name (dwarf2_per_objfile
->objfile
));
5417 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5419 case DW_IDX_die_offset
:
5420 /* In a per-CU index (as opposed to a per-module index), index
5421 entries without CU attribute implicitly refer to the single CU. */
5423 per_cu
= dwarf2_per_objfile
->get_cu (0);
5425 case DW_IDX_GNU_internal
:
5426 if (!m_map
.augmentation_is_gdb
)
5428 symbol_linkage_
= symbol_linkage::static_
;
5430 case DW_IDX_GNU_external
:
5431 if (!m_map
.augmentation_is_gdb
)
5433 symbol_linkage_
= symbol_linkage::extern_
;
5438 /* Skip if already read in. */
5439 if (per_cu
->v
.quick
->compunit_symtab
)
5442 /* Check static vs global. */
5443 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5445 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5446 const bool symbol_is_static
=
5447 symbol_linkage_
== symbol_linkage::static_
;
5448 if (want_static
!= symbol_is_static
)
5452 /* Match dw2_symtab_iter_next, symbol_kind
5453 and debug_names::psymbol_tag. */
5457 switch (indexval
.dwarf_tag
)
5459 case DW_TAG_variable
:
5460 case DW_TAG_subprogram
:
5461 /* Some types are also in VAR_DOMAIN. */
5462 case DW_TAG_typedef
:
5463 case DW_TAG_structure_type
:
5470 switch (indexval
.dwarf_tag
)
5472 case DW_TAG_typedef
:
5473 case DW_TAG_structure_type
:
5480 switch (indexval
.dwarf_tag
)
5483 case DW_TAG_variable
:
5490 switch (indexval
.dwarf_tag
)
5502 /* Match dw2_expand_symtabs_matching, symbol_kind and
5503 debug_names::psymbol_tag. */
5506 case VARIABLES_DOMAIN
:
5507 switch (indexval
.dwarf_tag
)
5509 case DW_TAG_variable
:
5515 case FUNCTIONS_DOMAIN
:
5516 switch (indexval
.dwarf_tag
)
5518 case DW_TAG_subprogram
:
5525 switch (indexval
.dwarf_tag
)
5527 case DW_TAG_typedef
:
5528 case DW_TAG_structure_type
:
5534 case MODULES_DOMAIN
:
5535 switch (indexval
.dwarf_tag
)
5549 static struct compunit_symtab
*
5550 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5551 const char *name
, domain_enum domain
)
5553 struct dwarf2_per_objfile
*dwarf2_per_objfile
5554 = get_dwarf2_per_objfile (objfile
);
5556 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
5559 /* index is NULL if OBJF_READNOW. */
5562 const auto &map
= *mapp
;
5564 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
5566 struct compunit_symtab
*stab_best
= NULL
;
5567 struct dwarf2_per_cu_data
*per_cu
;
5568 while ((per_cu
= iter
.next ()) != NULL
)
5570 struct symbol
*sym
, *with_opaque
= NULL
;
5571 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
5572 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5573 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5575 sym
= block_find_symbol (block
, name
, domain
,
5576 block_find_non_opaque_type_preferred
,
5579 /* Some caution must be observed with overloaded functions and
5580 methods, since the index will not contain any overload
5581 information (but NAME might contain it). */
5584 && strcmp_iw (sym
->search_name (), name
) == 0)
5586 if (with_opaque
!= NULL
5587 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5590 /* Keep looking through other CUs. */
5596 /* This dumps minimal information about .debug_names. It is called
5597 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5598 uses this to verify that .debug_names has been loaded. */
5601 dw2_debug_names_dump (struct objfile
*objfile
)
5603 struct dwarf2_per_objfile
*dwarf2_per_objfile
5604 = get_dwarf2_per_objfile (objfile
);
5606 gdb_assert (dwarf2_per_objfile
->using_index
);
5607 printf_filtered (".debug_names:");
5608 if (dwarf2_per_objfile
->debug_names_table
)
5609 printf_filtered (" exists\n");
5611 printf_filtered (" faked for \"readnow\"\n");
5612 printf_filtered ("\n");
5616 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5617 const char *func_name
)
5619 struct dwarf2_per_objfile
*dwarf2_per_objfile
5620 = get_dwarf2_per_objfile (objfile
);
5622 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
5623 if (dwarf2_per_objfile
->debug_names_table
)
5625 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5627 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
5629 struct dwarf2_per_cu_data
*per_cu
;
5630 while ((per_cu
= iter
.next ()) != NULL
)
5631 dw2_instantiate_symtab (per_cu
, false);
5636 dw2_debug_names_map_matching_symbols
5637 (struct objfile
*objfile
,
5638 const lookup_name_info
&name
, domain_enum domain
,
5640 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5641 symbol_compare_ftype
*ordered_compare
)
5643 struct dwarf2_per_objfile
*dwarf2_per_objfile
5644 = get_dwarf2_per_objfile (objfile
);
5646 /* debug_names_table is NULL if OBJF_READNOW. */
5647 if (!dwarf2_per_objfile
->debug_names_table
)
5650 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5651 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5653 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5654 auto matcher
= [&] (const char *symname
)
5656 if (ordered_compare
== nullptr)
5658 return ordered_compare (symname
, match_name
) == 0;
5661 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5662 [&] (offset_type namei
)
5664 /* The name was matched, now expand corresponding CUs that were
5666 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
5668 struct dwarf2_per_cu_data
*per_cu
;
5669 while ((per_cu
= iter
.next ()) != NULL
)
5670 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
5674 /* It's a shame we couldn't do this inside the
5675 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5676 that have already been expanded. Instead, this loop matches what
5677 the psymtab code does. */
5678 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5680 struct compunit_symtab
*cust
= per_cu
->v
.quick
->compunit_symtab
;
5681 if (cust
!= nullptr)
5683 const struct block
*block
5684 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
5685 if (!iterate_over_symbols_terminated (block
, name
,
5693 dw2_debug_names_expand_symtabs_matching
5694 (struct objfile
*objfile
,
5695 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5696 const lookup_name_info
*lookup_name
,
5697 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5698 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5699 enum search_domain kind
)
5701 struct dwarf2_per_objfile
*dwarf2_per_objfile
5702 = get_dwarf2_per_objfile (objfile
);
5704 /* debug_names_table is NULL if OBJF_READNOW. */
5705 if (!dwarf2_per_objfile
->debug_names_table
)
5708 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5710 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
5712 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5716 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5722 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5724 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
5726 kind
, [&] (offset_type namei
)
5728 /* The name was matched, now expand corresponding CUs that were
5730 dw2_debug_names_iterator
iter (map
, kind
, namei
);
5732 struct dwarf2_per_cu_data
*per_cu
;
5733 while ((per_cu
= iter
.next ()) != NULL
)
5734 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5740 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5743 dw2_find_last_source_symtab
,
5744 dw2_forget_cached_source_info
,
5745 dw2_map_symtabs_matching_filename
,
5746 dw2_debug_names_lookup_symbol
,
5749 dw2_debug_names_dump
,
5750 dw2_debug_names_expand_symtabs_for_function
,
5751 dw2_expand_all_symtabs
,
5752 dw2_expand_symtabs_with_fullname
,
5753 dw2_debug_names_map_matching_symbols
,
5754 dw2_debug_names_expand_symtabs_matching
,
5755 dw2_find_pc_sect_compunit_symtab
,
5757 dw2_map_symbol_filenames
5760 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5761 to either a dwarf2_per_objfile or dwz_file object. */
5763 template <typename T
>
5764 static gdb::array_view
<const gdb_byte
>
5765 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5767 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5769 if (section
->empty ())
5772 /* Older elfutils strip versions could keep the section in the main
5773 executable while splitting it for the separate debug info file. */
5774 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5777 section
->read (obj
);
5779 /* dwarf2_section_info::size is a bfd_size_type, while
5780 gdb::array_view works with size_t. On 32-bit hosts, with
5781 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5782 is 32-bit. So we need an explicit narrowing conversion here.
5783 This is fine, because it's impossible to allocate or mmap an
5784 array/buffer larger than what size_t can represent. */
5785 return gdb::make_array_view (section
->buffer
, section
->size
);
5788 /* Lookup the index cache for the contents of the index associated to
5791 static gdb::array_view
<const gdb_byte
>
5792 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
5794 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5795 if (build_id
== nullptr)
5798 return global_index_cache
.lookup_gdb_index (build_id
,
5799 &dwarf2_obj
->index_cache_res
);
5802 /* Same as the above, but for DWZ. */
5804 static gdb::array_view
<const gdb_byte
>
5805 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5807 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5808 if (build_id
== nullptr)
5811 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5814 /* See symfile.h. */
5817 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
5819 struct dwarf2_per_objfile
*dwarf2_per_objfile
5820 = get_dwarf2_per_objfile (objfile
);
5822 /* If we're about to read full symbols, don't bother with the
5823 indices. In this case we also don't care if some other debug
5824 format is making psymtabs, because they are all about to be
5826 if ((objfile
->flags
& OBJF_READNOW
))
5828 dwarf2_per_objfile
->using_index
= 1;
5829 create_all_comp_units (dwarf2_per_objfile
);
5830 create_all_type_units (dwarf2_per_objfile
);
5831 dwarf2_per_objfile
->quick_file_names_table
5832 = create_quick_file_names_table
5833 (dwarf2_per_objfile
->all_comp_units
.size ());
5835 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
5836 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
5838 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
5840 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5841 struct dwarf2_per_cu_quick_data
);
5844 /* Return 1 so that gdb sees the "quick" functions. However,
5845 these functions will be no-ops because we will have expanded
5847 *index_kind
= dw_index_kind::GDB_INDEX
;
5851 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
5853 *index_kind
= dw_index_kind::DEBUG_NAMES
;
5857 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5858 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
5859 get_gdb_index_contents_from_section
<dwz_file
>))
5861 *index_kind
= dw_index_kind::GDB_INDEX
;
5865 /* ... otherwise, try to find the index in the index cache. */
5866 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5867 get_gdb_index_contents_from_cache
,
5868 get_gdb_index_contents_from_cache_dwz
))
5870 global_index_cache
.hit ();
5871 *index_kind
= dw_index_kind::GDB_INDEX
;
5875 global_index_cache
.miss ();
5881 /* Build a partial symbol table. */
5884 dwarf2_build_psymtabs (struct objfile
*objfile
)
5886 struct dwarf2_per_objfile
*dwarf2_per_objfile
5887 = get_dwarf2_per_objfile (objfile
);
5889 init_psymbol_list (objfile
, 1024);
5893 /* This isn't really ideal: all the data we allocate on the
5894 objfile's obstack is still uselessly kept around. However,
5895 freeing it seems unsafe. */
5896 psymtab_discarder
psymtabs (objfile
);
5897 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
5900 /* (maybe) store an index in the cache. */
5901 global_index_cache
.store (dwarf2_per_objfile
);
5903 catch (const gdb_exception_error
&except
)
5905 exception_print (gdb_stderr
, except
);
5909 /* Find the base address of the compilation unit for range lists and
5910 location lists. It will normally be specified by DW_AT_low_pc.
5911 In DWARF-3 draft 4, the base address could be overridden by
5912 DW_AT_entry_pc. It's been removed, but GCC still uses this for
5913 compilation units with discontinuous ranges. */
5916 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
5918 struct attribute
*attr
;
5920 cu
->base_address
.reset ();
5922 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
5923 if (attr
!= nullptr)
5924 cu
->base_address
= attr
->value_as_address ();
5927 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5928 if (attr
!= nullptr)
5929 cu
->base_address
= attr
->value_as_address ();
5933 /* Helper function that returns the proper abbrev section for
5936 static struct dwarf2_section_info
*
5937 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
5939 struct dwarf2_section_info
*abbrev
;
5940 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
5942 if (this_cu
->is_dwz
)
5943 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
5945 abbrev
= &dwarf2_per_objfile
->abbrev
;
5950 /* Fetch the abbreviation table offset from a comp or type unit header. */
5953 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5954 struct dwarf2_section_info
*section
,
5955 sect_offset sect_off
)
5957 bfd
*abfd
= section
->get_bfd_owner ();
5958 const gdb_byte
*info_ptr
;
5959 unsigned int initial_length_size
, offset_size
;
5962 section
->read (dwarf2_per_objfile
->objfile
);
5963 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
5964 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5965 offset_size
= initial_length_size
== 4 ? 4 : 8;
5966 info_ptr
+= initial_length_size
;
5968 version
= read_2_bytes (abfd
, info_ptr
);
5972 /* Skip unit type and address size. */
5976 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
5979 /* A partial symtab that is used only for include files. */
5980 struct dwarf2_include_psymtab
: public partial_symtab
5982 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
5983 : partial_symtab (filename
, objfile
)
5987 void read_symtab (struct objfile
*objfile
) override
5989 /* It's an include file, no symbols to read for it.
5990 Everything is in the includer symtab. */
5992 /* The expansion of a dwarf2_include_psymtab is just a trigger for
5993 expansion of the includer psymtab. We use the dependencies[0] field to
5994 model the includer. But if we go the regular route of calling
5995 expand_psymtab here, and having expand_psymtab call expand_dependencies
5996 to expand the includer, we'll only use expand_psymtab on the includer
5997 (making it a non-toplevel psymtab), while if we expand the includer via
5998 another path, we'll use read_symtab (making it a toplevel psymtab).
5999 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
6000 psymtab, and trigger read_symtab on the includer here directly. */
6001 includer ()->read_symtab (objfile
);
6004 void expand_psymtab (struct objfile
*objfile
) override
6006 /* This is not called by read_symtab, and should not be called by any
6007 expand_dependencies. */
6011 bool readin_p () const override
6013 return includer ()->readin_p ();
6016 struct compunit_symtab
*get_compunit_symtab () const override
6022 partial_symtab
*includer () const
6024 /* An include psymtab has exactly one dependency: the psymtab that
6026 gdb_assert (this->number_of_dependencies
== 1);
6027 return this->dependencies
[0];
6031 /* Allocate a new partial symtab for file named NAME and mark this new
6032 partial symtab as being an include of PST. */
6035 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
6036 struct objfile
*objfile
)
6038 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
6040 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6042 /* It shares objfile->objfile_obstack. */
6043 subpst
->dirname
= pst
->dirname
;
6046 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6047 subpst
->dependencies
[0] = pst
;
6048 subpst
->number_of_dependencies
= 1;
6051 /* Read the Line Number Program data and extract the list of files
6052 included by the source file represented by PST. Build an include
6053 partial symtab for each of these included files. */
6056 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6057 struct die_info
*die
,
6058 dwarf2_psymtab
*pst
)
6061 struct attribute
*attr
;
6063 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6064 if (attr
!= nullptr)
6065 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6067 return; /* No linetable, so no includes. */
6069 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6070 that we pass in the raw text_low here; that is ok because we're
6071 only decoding the line table to make include partial symtabs, and
6072 so the addresses aren't really used. */
6073 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6074 pst
->raw_text_low (), 1);
6078 hash_signatured_type (const void *item
)
6080 const struct signatured_type
*sig_type
6081 = (const struct signatured_type
*) item
;
6083 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6084 return sig_type
->signature
;
6088 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6090 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6091 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6093 return lhs
->signature
== rhs
->signature
;
6096 /* Allocate a hash table for signatured types. */
6099 allocate_signatured_type_table ()
6101 return htab_up (htab_create_alloc (41,
6102 hash_signatured_type
,
6104 NULL
, xcalloc
, xfree
));
6107 /* A helper function to add a signatured type CU to a table. */
6110 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6112 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6113 std::vector
<signatured_type
*> *all_type_units
6114 = (std::vector
<signatured_type
*> *) datum
;
6116 all_type_units
->push_back (sigt
);
6121 /* A helper for create_debug_types_hash_table. Read types from SECTION
6122 and fill them into TYPES_HTAB. It will process only type units,
6123 therefore DW_UT_type. */
6126 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6127 struct dwo_file
*dwo_file
,
6128 dwarf2_section_info
*section
, htab_up
&types_htab
,
6129 rcuh_kind section_kind
)
6131 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6132 struct dwarf2_section_info
*abbrev_section
;
6134 const gdb_byte
*info_ptr
, *end_ptr
;
6136 abbrev_section
= (dwo_file
!= NULL
6137 ? &dwo_file
->sections
.abbrev
6138 : &dwarf2_per_objfile
->abbrev
);
6140 if (dwarf_read_debug
)
6141 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6142 section
->get_name (),
6143 abbrev_section
->get_file_name ());
6145 section
->read (objfile
);
6146 info_ptr
= section
->buffer
;
6148 if (info_ptr
== NULL
)
6151 /* We can't set abfd until now because the section may be empty or
6152 not present, in which case the bfd is unknown. */
6153 abfd
= section
->get_bfd_owner ();
6155 /* We don't use cutu_reader here because we don't need to read
6156 any dies: the signature is in the header. */
6158 end_ptr
= info_ptr
+ section
->size
;
6159 while (info_ptr
< end_ptr
)
6161 struct signatured_type
*sig_type
;
6162 struct dwo_unit
*dwo_tu
;
6164 const gdb_byte
*ptr
= info_ptr
;
6165 struct comp_unit_head header
;
6166 unsigned int length
;
6168 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6170 /* Initialize it due to a false compiler warning. */
6171 header
.signature
= -1;
6172 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6174 /* We need to read the type's signature in order to build the hash
6175 table, but we don't need anything else just yet. */
6177 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6178 abbrev_section
, ptr
, section_kind
);
6180 length
= header
.get_length ();
6182 /* Skip dummy type units. */
6183 if (ptr
>= info_ptr
+ length
6184 || peek_abbrev_code (abfd
, ptr
) == 0
6185 || header
.unit_type
!= DW_UT_type
)
6191 if (types_htab
== NULL
)
6194 types_htab
= allocate_dwo_unit_table ();
6196 types_htab
= allocate_signatured_type_table ();
6202 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6204 dwo_tu
->dwo_file
= dwo_file
;
6205 dwo_tu
->signature
= header
.signature
;
6206 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6207 dwo_tu
->section
= section
;
6208 dwo_tu
->sect_off
= sect_off
;
6209 dwo_tu
->length
= length
;
6213 /* N.B.: type_offset is not usable if this type uses a DWO file.
6214 The real type_offset is in the DWO file. */
6216 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6217 struct signatured_type
);
6218 sig_type
->signature
= header
.signature
;
6219 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6220 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6221 sig_type
->per_cu
.is_debug_types
= 1;
6222 sig_type
->per_cu
.section
= section
;
6223 sig_type
->per_cu
.sect_off
= sect_off
;
6224 sig_type
->per_cu
.length
= length
;
6227 slot
= htab_find_slot (types_htab
.get (),
6228 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6230 gdb_assert (slot
!= NULL
);
6233 sect_offset dup_sect_off
;
6237 const struct dwo_unit
*dup_tu
6238 = (const struct dwo_unit
*) *slot
;
6240 dup_sect_off
= dup_tu
->sect_off
;
6244 const struct signatured_type
*dup_tu
6245 = (const struct signatured_type
*) *slot
;
6247 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6250 complaint (_("debug type entry at offset %s is duplicate to"
6251 " the entry at offset %s, signature %s"),
6252 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6253 hex_string (header
.signature
));
6255 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6257 if (dwarf_read_debug
> 1)
6258 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6259 sect_offset_str (sect_off
),
6260 hex_string (header
.signature
));
6266 /* Create the hash table of all entries in the .debug_types
6267 (or .debug_types.dwo) section(s).
6268 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6269 otherwise it is NULL.
6271 The result is a pointer to the hash table or NULL if there are no types.
6273 Note: This function processes DWO files only, not DWP files. */
6276 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6277 struct dwo_file
*dwo_file
,
6278 gdb::array_view
<dwarf2_section_info
> type_sections
,
6279 htab_up
&types_htab
)
6281 for (dwarf2_section_info
§ion
: type_sections
)
6282 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6283 types_htab
, rcuh_kind::TYPE
);
6286 /* Create the hash table of all entries in the .debug_types section,
6287 and initialize all_type_units.
6288 The result is zero if there is an error (e.g. missing .debug_types section),
6289 otherwise non-zero. */
6292 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6296 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6297 &dwarf2_per_objfile
->info
, types_htab
,
6298 rcuh_kind::COMPILE
);
6299 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6300 dwarf2_per_objfile
->types
, types_htab
);
6301 if (types_htab
== NULL
)
6303 dwarf2_per_objfile
->signatured_types
= NULL
;
6307 dwarf2_per_objfile
->signatured_types
= std::move (types_htab
);
6309 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6310 dwarf2_per_objfile
->all_type_units
.reserve
6311 (htab_elements (dwarf2_per_objfile
->signatured_types
.get ()));
6313 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
.get (),
6314 add_signatured_type_cu_to_table
,
6315 &dwarf2_per_objfile
->all_type_units
);
6320 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6321 If SLOT is non-NULL, it is the entry to use in the hash table.
6322 Otherwise we find one. */
6324 static struct signatured_type
*
6325 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6328 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6330 if (dwarf2_per_objfile
->all_type_units
.size ()
6331 == dwarf2_per_objfile
->all_type_units
.capacity ())
6332 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6334 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6335 struct signatured_type
);
6337 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6338 sig_type
->signature
= sig
;
6339 sig_type
->per_cu
.is_debug_types
= 1;
6340 if (dwarf2_per_objfile
->using_index
)
6342 sig_type
->per_cu
.v
.quick
=
6343 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6344 struct dwarf2_per_cu_quick_data
);
6349 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6352 gdb_assert (*slot
== NULL
);
6354 /* The rest of sig_type must be filled in by the caller. */
6358 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6359 Fill in SIG_ENTRY with DWO_ENTRY. */
6362 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6363 struct signatured_type
*sig_entry
,
6364 struct dwo_unit
*dwo_entry
)
6366 /* Make sure we're not clobbering something we don't expect to. */
6367 gdb_assert (! sig_entry
->per_cu
.queued
);
6368 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6369 if (dwarf2_per_objfile
->using_index
)
6371 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6372 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6375 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6376 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6377 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6378 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6379 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6381 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6382 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6383 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6384 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6385 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6386 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6387 sig_entry
->dwo_unit
= dwo_entry
;
6390 /* Subroutine of lookup_signatured_type.
6391 If we haven't read the TU yet, create the signatured_type data structure
6392 for a TU to be read in directly from a DWO file, bypassing the stub.
6393 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6394 using .gdb_index, then when reading a CU we want to stay in the DWO file
6395 containing that CU. Otherwise we could end up reading several other DWO
6396 files (due to comdat folding) to process the transitive closure of all the
6397 mentioned TUs, and that can be slow. The current DWO file will have every
6398 type signature that it needs.
6399 We only do this for .gdb_index because in the psymtab case we already have
6400 to read all the DWOs to build the type unit groups. */
6402 static struct signatured_type
*
6403 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6405 struct dwarf2_per_objfile
*dwarf2_per_objfile
6406 = cu
->per_cu
->dwarf2_per_objfile
;
6407 struct dwo_file
*dwo_file
;
6408 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6409 struct signatured_type find_sig_entry
, *sig_entry
;
6412 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6414 /* If TU skeletons have been removed then we may not have read in any
6416 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6417 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6419 /* We only ever need to read in one copy of a signatured type.
6420 Use the global signatured_types array to do our own comdat-folding
6421 of types. If this is the first time we're reading this TU, and
6422 the TU has an entry in .gdb_index, replace the recorded data from
6423 .gdb_index with this TU. */
6425 find_sig_entry
.signature
= sig
;
6426 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6427 &find_sig_entry
, INSERT
);
6428 sig_entry
= (struct signatured_type
*) *slot
;
6430 /* We can get here with the TU already read, *or* in the process of being
6431 read. Don't reassign the global entry to point to this DWO if that's
6432 the case. Also note that if the TU is already being read, it may not
6433 have come from a DWO, the program may be a mix of Fission-compiled
6434 code and non-Fission-compiled code. */
6436 /* Have we already tried to read this TU?
6437 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6438 needn't exist in the global table yet). */
6439 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6442 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6443 dwo_unit of the TU itself. */
6444 dwo_file
= cu
->dwo_unit
->dwo_file
;
6446 /* Ok, this is the first time we're reading this TU. */
6447 if (dwo_file
->tus
== NULL
)
6449 find_dwo_entry
.signature
= sig
;
6450 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6452 if (dwo_entry
== NULL
)
6455 /* If the global table doesn't have an entry for this TU, add one. */
6456 if (sig_entry
== NULL
)
6457 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6459 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6460 sig_entry
->per_cu
.tu_read
= 1;
6464 /* Subroutine of lookup_signatured_type.
6465 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6466 then try the DWP file. If the TU stub (skeleton) has been removed then
6467 it won't be in .gdb_index. */
6469 static struct signatured_type
*
6470 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6472 struct dwarf2_per_objfile
*dwarf2_per_objfile
6473 = cu
->per_cu
->dwarf2_per_objfile
;
6474 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6475 struct dwo_unit
*dwo_entry
;
6476 struct signatured_type find_sig_entry
, *sig_entry
;
6479 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6480 gdb_assert (dwp_file
!= NULL
);
6482 /* If TU skeletons have been removed then we may not have read in any
6484 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6485 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6487 find_sig_entry
.signature
= sig
;
6488 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6489 &find_sig_entry
, INSERT
);
6490 sig_entry
= (struct signatured_type
*) *slot
;
6492 /* Have we already tried to read this TU?
6493 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6494 needn't exist in the global table yet). */
6495 if (sig_entry
!= NULL
)
6498 if (dwp_file
->tus
== NULL
)
6500 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6501 sig
, 1 /* is_debug_types */);
6502 if (dwo_entry
== NULL
)
6505 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6506 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6511 /* Lookup a signature based type for DW_FORM_ref_sig8.
6512 Returns NULL if signature SIG is not present in the table.
6513 It is up to the caller to complain about this. */
6515 static struct signatured_type
*
6516 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6518 struct dwarf2_per_objfile
*dwarf2_per_objfile
6519 = cu
->per_cu
->dwarf2_per_objfile
;
6522 && dwarf2_per_objfile
->using_index
)
6524 /* We're in a DWO/DWP file, and we're using .gdb_index.
6525 These cases require special processing. */
6526 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
6527 return lookup_dwo_signatured_type (cu
, sig
);
6529 return lookup_dwp_signatured_type (cu
, sig
);
6533 struct signatured_type find_entry
, *entry
;
6535 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6537 find_entry
.signature
= sig
;
6538 entry
= ((struct signatured_type
*)
6539 htab_find (dwarf2_per_objfile
->signatured_types
.get (),
6545 /* Low level DIE reading support. */
6547 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6550 init_cu_die_reader (struct die_reader_specs
*reader
,
6551 struct dwarf2_cu
*cu
,
6552 struct dwarf2_section_info
*section
,
6553 struct dwo_file
*dwo_file
,
6554 struct abbrev_table
*abbrev_table
)
6556 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6557 reader
->abfd
= section
->get_bfd_owner ();
6559 reader
->dwo_file
= dwo_file
;
6560 reader
->die_section
= section
;
6561 reader
->buffer
= section
->buffer
;
6562 reader
->buffer_end
= section
->buffer
+ section
->size
;
6563 reader
->abbrev_table
= abbrev_table
;
6566 /* Subroutine of cutu_reader to simplify it.
6567 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6568 There's just a lot of work to do, and cutu_reader is big enough
6571 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6572 from it to the DIE in the DWO. If NULL we are skipping the stub.
6573 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6574 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6575 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6576 STUB_COMP_DIR may be non-NULL.
6577 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6578 are filled in with the info of the DIE from the DWO file.
6579 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6580 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6581 kept around for at least as long as *RESULT_READER.
6583 The result is non-zero if a valid (non-dummy) DIE was found. */
6586 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
6587 struct dwo_unit
*dwo_unit
,
6588 struct die_info
*stub_comp_unit_die
,
6589 const char *stub_comp_dir
,
6590 struct die_reader_specs
*result_reader
,
6591 const gdb_byte
**result_info_ptr
,
6592 struct die_info
**result_comp_unit_die
,
6593 abbrev_table_up
*result_dwo_abbrev_table
)
6595 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6596 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6597 struct dwarf2_cu
*cu
= this_cu
->cu
;
6599 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6600 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6601 int i
,num_extra_attrs
;
6602 struct dwarf2_section_info
*dwo_abbrev_section
;
6603 struct die_info
*comp_unit_die
;
6605 /* At most one of these may be provided. */
6606 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6608 /* These attributes aren't processed until later:
6609 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6610 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6611 referenced later. However, these attributes are found in the stub
6612 which we won't have later. In order to not impose this complication
6613 on the rest of the code, we read them here and copy them to the
6622 if (stub_comp_unit_die
!= NULL
)
6624 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6626 if (! this_cu
->is_debug_types
)
6627 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6628 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6629 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6630 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6631 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6633 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6635 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6636 here (if needed). We need the value before we can process
6638 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6640 else if (stub_comp_dir
!= NULL
)
6642 /* Reconstruct the comp_dir attribute to simplify the code below. */
6643 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6644 comp_dir
->name
= DW_AT_comp_dir
;
6645 comp_dir
->form
= DW_FORM_string
;
6646 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6647 DW_STRING (comp_dir
) = stub_comp_dir
;
6650 /* Set up for reading the DWO CU/TU. */
6651 cu
->dwo_unit
= dwo_unit
;
6652 dwarf2_section_info
*section
= dwo_unit
->section
;
6653 section
->read (objfile
);
6654 abfd
= section
->get_bfd_owner ();
6655 begin_info_ptr
= info_ptr
= (section
->buffer
6656 + to_underlying (dwo_unit
->sect_off
));
6657 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6659 if (this_cu
->is_debug_types
)
6661 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
6663 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6664 &cu
->header
, section
,
6666 info_ptr
, rcuh_kind::TYPE
);
6667 /* This is not an assert because it can be caused by bad debug info. */
6668 if (sig_type
->signature
!= cu
->header
.signature
)
6670 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6671 " TU at offset %s [in module %s]"),
6672 hex_string (sig_type
->signature
),
6673 hex_string (cu
->header
.signature
),
6674 sect_offset_str (dwo_unit
->sect_off
),
6675 bfd_get_filename (abfd
));
6677 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6678 /* For DWOs coming from DWP files, we don't know the CU length
6679 nor the type's offset in the TU until now. */
6680 dwo_unit
->length
= cu
->header
.get_length ();
6681 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6683 /* Establish the type offset that can be used to lookup the type.
6684 For DWO files, we don't know it until now. */
6685 sig_type
->type_offset_in_section
6686 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6690 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6691 &cu
->header
, section
,
6693 info_ptr
, rcuh_kind::COMPILE
);
6694 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6695 /* For DWOs coming from DWP files, we don't know the CU length
6697 dwo_unit
->length
= cu
->header
.get_length ();
6700 *result_dwo_abbrev_table
6701 = abbrev_table::read (objfile
, dwo_abbrev_section
,
6702 cu
->header
.abbrev_sect_off
);
6703 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
6704 result_dwo_abbrev_table
->get ());
6706 /* Read in the die, but leave space to copy over the attributes
6707 from the stub. This has the benefit of simplifying the rest of
6708 the code - all the work to maintain the illusion of a single
6709 DW_TAG_{compile,type}_unit DIE is done here. */
6710 num_extra_attrs
= ((stmt_list
!= NULL
)
6714 + (comp_dir
!= NULL
));
6715 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6718 /* Copy over the attributes from the stub to the DIE we just read in. */
6719 comp_unit_die
= *result_comp_unit_die
;
6720 i
= comp_unit_die
->num_attrs
;
6721 if (stmt_list
!= NULL
)
6722 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6724 comp_unit_die
->attrs
[i
++] = *low_pc
;
6725 if (high_pc
!= NULL
)
6726 comp_unit_die
->attrs
[i
++] = *high_pc
;
6728 comp_unit_die
->attrs
[i
++] = *ranges
;
6729 if (comp_dir
!= NULL
)
6730 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6731 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6733 if (dwarf_die_debug
)
6735 fprintf_unfiltered (gdb_stdlog
,
6736 "Read die from %s@0x%x of %s:\n",
6737 section
->get_name (),
6738 (unsigned) (begin_info_ptr
- section
->buffer
),
6739 bfd_get_filename (abfd
));
6740 dump_die (comp_unit_die
, dwarf_die_debug
);
6743 /* Skip dummy compilation units. */
6744 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6745 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6748 *result_info_ptr
= info_ptr
;
6752 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
6753 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
6754 signature is part of the header. */
6755 static gdb::optional
<ULONGEST
>
6756 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
6758 if (cu
->header
.version
>= 5)
6759 return cu
->header
.signature
;
6760 struct attribute
*attr
;
6761 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6762 if (attr
== nullptr)
6763 return gdb::optional
<ULONGEST
> ();
6764 return DW_UNSND (attr
);
6767 /* Subroutine of cutu_reader to simplify it.
6768 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6769 Returns NULL if the specified DWO unit cannot be found. */
6771 static struct dwo_unit
*
6772 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
6773 struct die_info
*comp_unit_die
,
6774 const char *dwo_name
)
6776 struct dwarf2_cu
*cu
= this_cu
->cu
;
6777 struct dwo_unit
*dwo_unit
;
6778 const char *comp_dir
;
6780 gdb_assert (cu
!= NULL
);
6782 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6783 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6784 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6786 if (this_cu
->is_debug_types
)
6788 struct signatured_type
*sig_type
;
6790 /* Since this_cu is the first member of struct signatured_type,
6791 we can go from a pointer to one to a pointer to the other. */
6792 sig_type
= (struct signatured_type
*) this_cu
;
6793 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
6797 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
6798 if (!signature
.has_value ())
6799 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6801 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
6802 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
6809 /* Subroutine of cutu_reader to simplify it.
6810 See it for a description of the parameters.
6811 Read a TU directly from a DWO file, bypassing the stub. */
6814 cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
6815 int use_existing_cu
)
6817 struct signatured_type
*sig_type
;
6819 /* Verify we can do the following downcast, and that we have the
6821 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6822 sig_type
= (struct signatured_type
*) this_cu
;
6823 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6825 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6827 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6828 /* There's no need to do the rereading_dwo_cu handling that
6829 cutu_reader does since we don't read the stub. */
6833 /* If !use_existing_cu, this_cu->cu must be NULL. */
6834 gdb_assert (this_cu
->cu
== NULL
);
6835 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6838 /* A future optimization, if needed, would be to use an existing
6839 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6840 could share abbrev tables. */
6842 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
6843 NULL
/* stub_comp_unit_die */,
6844 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6847 &m_dwo_abbrev_table
) == 0)
6854 /* Initialize a CU (or TU) and read its DIEs.
6855 If the CU defers to a DWO file, read the DWO file as well.
6857 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6858 Otherwise the table specified in the comp unit header is read in and used.
6859 This is an optimization for when we already have the abbrev table.
6861 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6862 Otherwise, a new CU is allocated with xmalloc. */
6864 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
6865 struct abbrev_table
*abbrev_table
,
6866 int use_existing_cu
,
6868 : die_reader_specs
{},
6871 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6872 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6873 struct dwarf2_section_info
*section
= this_cu
->section
;
6874 bfd
*abfd
= section
->get_bfd_owner ();
6875 struct dwarf2_cu
*cu
;
6876 const gdb_byte
*begin_info_ptr
;
6877 struct signatured_type
*sig_type
= NULL
;
6878 struct dwarf2_section_info
*abbrev_section
;
6879 /* Non-zero if CU currently points to a DWO file and we need to
6880 reread it. When this happens we need to reread the skeleton die
6881 before we can reread the DWO file (this only applies to CUs, not TUs). */
6882 int rereading_dwo_cu
= 0;
6884 if (dwarf_die_debug
)
6885 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
6886 this_cu
->is_debug_types
? "type" : "comp",
6887 sect_offset_str (this_cu
->sect_off
));
6889 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6890 file (instead of going through the stub), short-circuit all of this. */
6891 if (this_cu
->reading_dwo_directly
)
6893 /* Narrow down the scope of possibilities to have to understand. */
6894 gdb_assert (this_cu
->is_debug_types
);
6895 gdb_assert (abbrev_table
== NULL
);
6896 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
);
6900 /* This is cheap if the section is already read in. */
6901 section
->read (objfile
);
6903 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6905 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
6907 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6910 /* If this CU is from a DWO file we need to start over, we need to
6911 refetch the attributes from the skeleton CU.
6912 This could be optimized by retrieving those attributes from when we
6913 were here the first time: the previous comp_unit_die was stored in
6914 comp_unit_obstack. But there's no data yet that we need this
6916 if (cu
->dwo_unit
!= NULL
)
6917 rereading_dwo_cu
= 1;
6921 /* If !use_existing_cu, this_cu->cu must be NULL. */
6922 gdb_assert (this_cu
->cu
== NULL
);
6923 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6924 cu
= m_new_cu
.get ();
6927 /* Get the header. */
6928 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
6930 /* We already have the header, there's no need to read it in again. */
6931 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
6935 if (this_cu
->is_debug_types
)
6937 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6938 &cu
->header
, section
,
6939 abbrev_section
, info_ptr
,
6942 /* Since per_cu is the first member of struct signatured_type,
6943 we can go from a pointer to one to a pointer to the other. */
6944 sig_type
= (struct signatured_type
*) this_cu
;
6945 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
6946 gdb_assert (sig_type
->type_offset_in_tu
6947 == cu
->header
.type_cu_offset_in_tu
);
6948 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6950 /* LENGTH has not been set yet for type units if we're
6951 using .gdb_index. */
6952 this_cu
->length
= cu
->header
.get_length ();
6954 /* Establish the type offset that can be used to lookup the type. */
6955 sig_type
->type_offset_in_section
=
6956 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
6958 this_cu
->dwarf_version
= cu
->header
.version
;
6962 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6963 &cu
->header
, section
,
6966 rcuh_kind::COMPILE
);
6968 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6969 if (this_cu
->length
== 0)
6970 this_cu
->length
= cu
->header
.get_length ();
6972 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
6973 this_cu
->dwarf_version
= cu
->header
.version
;
6977 /* Skip dummy compilation units. */
6978 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
6979 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6985 /* If we don't have them yet, read the abbrevs for this compilation unit.
6986 And if we need to read them now, make sure they're freed when we're
6988 if (abbrev_table
!= NULL
)
6989 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
6992 m_abbrev_table_holder
6993 = abbrev_table::read (objfile
, abbrev_section
,
6994 cu
->header
.abbrev_sect_off
);
6995 abbrev_table
= m_abbrev_table_holder
.get ();
6998 /* Read the top level CU/TU die. */
6999 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
7000 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7002 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7008 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7009 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7010 table from the DWO file and pass the ownership over to us. It will be
7011 referenced from READER, so we must make sure to free it after we're done
7014 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7015 DWO CU, that this test will fail (the attribute will not be present). */
7016 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7017 if (dwo_name
!= nullptr)
7019 struct dwo_unit
*dwo_unit
;
7020 struct die_info
*dwo_comp_unit_die
;
7022 if (comp_unit_die
->has_children
)
7024 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7025 " has children (offset %s) [in module %s]"),
7026 sect_offset_str (this_cu
->sect_off
),
7027 bfd_get_filename (abfd
));
7029 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
, dwo_name
);
7030 if (dwo_unit
!= NULL
)
7032 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7033 comp_unit_die
, NULL
,
7036 &m_dwo_abbrev_table
) == 0)
7042 comp_unit_die
= dwo_comp_unit_die
;
7046 /* Yikes, we couldn't find the rest of the DIE, we only have
7047 the stub. A complaint has already been logged. There's
7048 not much more we can do except pass on the stub DIE to
7049 die_reader_func. We don't want to throw an error on bad
7056 cutu_reader::keep ()
7058 /* Done, clean up. */
7059 gdb_assert (!dummy_p
);
7060 if (m_new_cu
!= NULL
)
7062 struct dwarf2_per_objfile
*dwarf2_per_objfile
7063 = m_this_cu
->dwarf2_per_objfile
;
7064 /* Link this CU into read_in_chain. */
7065 m_this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7066 dwarf2_per_objfile
->read_in_chain
= m_this_cu
;
7067 /* The chain owns it now. */
7068 m_new_cu
.release ();
7072 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7073 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7074 assumed to have already done the lookup to find the DWO file).
7076 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7077 THIS_CU->is_debug_types, but nothing else.
7079 We fill in THIS_CU->length.
7081 THIS_CU->cu is always freed when done.
7082 This is done in order to not leave THIS_CU->cu in a state where we have
7083 to care whether it refers to the "main" CU or the DWO CU.
7085 When parent_cu is passed, it is used to provide a default value for
7086 str_offsets_base and addr_base from the parent. */
7088 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
7089 struct dwarf2_cu
*parent_cu
,
7090 struct dwo_file
*dwo_file
)
7091 : die_reader_specs
{},
7094 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7095 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7096 struct dwarf2_section_info
*section
= this_cu
->section
;
7097 bfd
*abfd
= section
->get_bfd_owner ();
7098 struct dwarf2_section_info
*abbrev_section
;
7099 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7101 if (dwarf_die_debug
)
7102 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7103 this_cu
->is_debug_types
? "type" : "comp",
7104 sect_offset_str (this_cu
->sect_off
));
7106 gdb_assert (this_cu
->cu
== NULL
);
7108 abbrev_section
= (dwo_file
!= NULL
7109 ? &dwo_file
->sections
.abbrev
7110 : get_abbrev_section_for_cu (this_cu
));
7112 /* This is cheap if the section is already read in. */
7113 section
->read (objfile
);
7115 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7117 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7118 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7119 &m_new_cu
->header
, section
,
7120 abbrev_section
, info_ptr
,
7121 (this_cu
->is_debug_types
7123 : rcuh_kind::COMPILE
));
7125 if (parent_cu
!= nullptr)
7127 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7128 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7130 this_cu
->length
= m_new_cu
->header
.get_length ();
7132 /* Skip dummy compilation units. */
7133 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7134 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7140 m_abbrev_table_holder
7141 = abbrev_table::read (objfile
, abbrev_section
,
7142 m_new_cu
->header
.abbrev_sect_off
);
7144 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7145 m_abbrev_table_holder
.get ());
7146 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7150 /* Type Unit Groups.
7152 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7153 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7154 so that all types coming from the same compilation (.o file) are grouped
7155 together. A future step could be to put the types in the same symtab as
7156 the CU the types ultimately came from. */
7159 hash_type_unit_group (const void *item
)
7161 const struct type_unit_group
*tu_group
7162 = (const struct type_unit_group
*) item
;
7164 return hash_stmt_list_entry (&tu_group
->hash
);
7168 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7170 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7171 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7173 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7176 /* Allocate a hash table for type unit groups. */
7179 allocate_type_unit_groups_table ()
7181 return htab_up (htab_create_alloc (3,
7182 hash_type_unit_group
,
7184 NULL
, xcalloc
, xfree
));
7187 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7188 partial symtabs. We combine several TUs per psymtab to not let the size
7189 of any one psymtab grow too big. */
7190 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7191 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7193 /* Helper routine for get_type_unit_group.
7194 Create the type_unit_group object used to hold one or more TUs. */
7196 static struct type_unit_group
*
7197 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7199 struct dwarf2_per_objfile
*dwarf2_per_objfile
7200 = cu
->per_cu
->dwarf2_per_objfile
;
7201 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7202 struct dwarf2_per_cu_data
*per_cu
;
7203 struct type_unit_group
*tu_group
;
7205 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7206 struct type_unit_group
);
7207 per_cu
= &tu_group
->per_cu
;
7208 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7210 if (dwarf2_per_objfile
->using_index
)
7212 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7213 struct dwarf2_per_cu_quick_data
);
7217 unsigned int line_offset
= to_underlying (line_offset_struct
);
7218 dwarf2_psymtab
*pst
;
7221 /* Give the symtab a useful name for debug purposes. */
7222 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7223 name
= string_printf ("<type_units_%d>",
7224 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7226 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7228 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7229 pst
->anonymous
= true;
7232 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7233 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7238 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7239 STMT_LIST is a DW_AT_stmt_list attribute. */
7241 static struct type_unit_group
*
7242 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7244 struct dwarf2_per_objfile
*dwarf2_per_objfile
7245 = cu
->per_cu
->dwarf2_per_objfile
;
7246 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7247 struct type_unit_group
*tu_group
;
7249 unsigned int line_offset
;
7250 struct type_unit_group type_unit_group_for_lookup
;
7252 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7253 dwarf2_per_objfile
->type_unit_groups
= allocate_type_unit_groups_table ();
7255 /* Do we need to create a new group, or can we use an existing one? */
7259 line_offset
= DW_UNSND (stmt_list
);
7260 ++tu_stats
->nr_symtab_sharers
;
7264 /* Ugh, no stmt_list. Rare, but we have to handle it.
7265 We can do various things here like create one group per TU or
7266 spread them over multiple groups to split up the expansion work.
7267 To avoid worst case scenarios (too many groups or too large groups)
7268 we, umm, group them in bunches. */
7269 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7270 | (tu_stats
->nr_stmt_less_type_units
7271 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7272 ++tu_stats
->nr_stmt_less_type_units
;
7275 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7276 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7277 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
.get (),
7278 &type_unit_group_for_lookup
, INSERT
);
7281 tu_group
= (struct type_unit_group
*) *slot
;
7282 gdb_assert (tu_group
!= NULL
);
7286 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7287 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7289 ++tu_stats
->nr_symtabs
;
7295 /* Partial symbol tables. */
7297 /* Create a psymtab named NAME and assign it to PER_CU.
7299 The caller must fill in the following details:
7300 dirname, textlow, texthigh. */
7302 static dwarf2_psymtab
*
7303 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7305 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7306 dwarf2_psymtab
*pst
;
7308 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7310 pst
->psymtabs_addrmap_supported
= true;
7312 /* This is the glue that links PST into GDB's symbol API. */
7313 per_cu
->v
.psymtab
= pst
;
7318 /* DIE reader function for process_psymtab_comp_unit. */
7321 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7322 const gdb_byte
*info_ptr
,
7323 struct die_info
*comp_unit_die
,
7324 enum language pretend_language
)
7326 struct dwarf2_cu
*cu
= reader
->cu
;
7327 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7328 struct gdbarch
*gdbarch
= objfile
->arch ();
7329 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7331 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7332 dwarf2_psymtab
*pst
;
7333 enum pc_bounds_kind cu_bounds_kind
;
7334 const char *filename
;
7336 gdb_assert (! per_cu
->is_debug_types
);
7338 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7340 /* Allocate a new partial symbol table structure. */
7341 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7342 static const char artificial
[] = "<artificial>";
7343 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7344 if (filename
== NULL
)
7346 else if (strcmp (filename
, artificial
) == 0)
7348 debug_filename
.reset (concat (artificial
, "@",
7349 sect_offset_str (per_cu
->sect_off
),
7351 filename
= debug_filename
.get ();
7354 pst
= create_partial_symtab (per_cu
, filename
);
7356 /* This must be done before calling dwarf2_build_include_psymtabs. */
7357 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7359 baseaddr
= objfile
->text_section_offset ();
7361 dwarf2_find_base_address (comp_unit_die
, cu
);
7363 /* Possibly set the default values of LOWPC and HIGHPC from
7365 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7366 &best_highpc
, cu
, pst
);
7367 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7370 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7373 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7375 /* Store the contiguous range if it is not empty; it can be
7376 empty for CUs with no code. */
7377 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7381 /* Check if comp unit has_children.
7382 If so, read the rest of the partial symbols from this comp unit.
7383 If not, there's no more debug_info for this comp unit. */
7384 if (comp_unit_die
->has_children
)
7386 struct partial_die_info
*first_die
;
7387 CORE_ADDR lowpc
, highpc
;
7389 lowpc
= ((CORE_ADDR
) -1);
7390 highpc
= ((CORE_ADDR
) 0);
7392 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7394 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7395 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7397 /* If we didn't find a lowpc, set it to highpc to avoid
7398 complaints from `maint check'. */
7399 if (lowpc
== ((CORE_ADDR
) -1))
7402 /* If the compilation unit didn't have an explicit address range,
7403 then use the information extracted from its child dies. */
7404 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7407 best_highpc
= highpc
;
7410 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7411 best_lowpc
+ baseaddr
)
7413 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7414 best_highpc
+ baseaddr
)
7417 end_psymtab_common (objfile
, pst
);
7419 if (!cu
->per_cu
->imported_symtabs_empty ())
7422 int len
= cu
->per_cu
->imported_symtabs_size ();
7424 /* Fill in 'dependencies' here; we fill in 'users' in a
7426 pst
->number_of_dependencies
= len
;
7428 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7429 for (i
= 0; i
< len
; ++i
)
7431 pst
->dependencies
[i
]
7432 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7435 cu
->per_cu
->imported_symtabs_free ();
7438 /* Get the list of files included in the current compilation unit,
7439 and build a psymtab for each of them. */
7440 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7442 if (dwarf_read_debug
)
7443 fprintf_unfiltered (gdb_stdlog
,
7444 "Psymtab for %s unit @%s: %s - %s"
7445 ", %d global, %d static syms\n",
7446 per_cu
->is_debug_types
? "type" : "comp",
7447 sect_offset_str (per_cu
->sect_off
),
7448 paddress (gdbarch
, pst
->text_low (objfile
)),
7449 paddress (gdbarch
, pst
->text_high (objfile
)),
7450 pst
->n_global_syms
, pst
->n_static_syms
);
7453 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7454 Process compilation unit THIS_CU for a psymtab. */
7457 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7458 bool want_partial_unit
,
7459 enum language pretend_language
)
7461 /* If this compilation unit was already read in, free the
7462 cached copy in order to read it in again. This is
7463 necessary because we skipped some symbols when we first
7464 read in the compilation unit (see load_partial_dies).
7465 This problem could be avoided, but the benefit is unclear. */
7466 if (this_cu
->cu
!= NULL
)
7467 free_one_cached_comp_unit (this_cu
);
7469 cutu_reader
reader (this_cu
, NULL
, 0, false);
7471 switch (reader
.comp_unit_die
->tag
)
7473 case DW_TAG_compile_unit
:
7474 this_cu
->unit_type
= DW_UT_compile
;
7476 case DW_TAG_partial_unit
:
7477 this_cu
->unit_type
= DW_UT_partial
;
7487 else if (this_cu
->is_debug_types
)
7488 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7489 reader
.comp_unit_die
);
7490 else if (want_partial_unit
7491 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7492 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7493 reader
.comp_unit_die
,
7496 this_cu
->lang
= this_cu
->cu
->language
;
7498 /* Age out any secondary CUs. */
7499 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
7502 /* Reader function for build_type_psymtabs. */
7505 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7506 const gdb_byte
*info_ptr
,
7507 struct die_info
*type_unit_die
)
7509 struct dwarf2_per_objfile
*dwarf2_per_objfile
7510 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
7511 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7512 struct dwarf2_cu
*cu
= reader
->cu
;
7513 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7514 struct signatured_type
*sig_type
;
7515 struct type_unit_group
*tu_group
;
7516 struct attribute
*attr
;
7517 struct partial_die_info
*first_die
;
7518 CORE_ADDR lowpc
, highpc
;
7519 dwarf2_psymtab
*pst
;
7521 gdb_assert (per_cu
->is_debug_types
);
7522 sig_type
= (struct signatured_type
*) per_cu
;
7524 if (! type_unit_die
->has_children
)
7527 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7528 tu_group
= get_type_unit_group (cu
, attr
);
7530 if (tu_group
->tus
== nullptr)
7531 tu_group
->tus
= new std::vector
<signatured_type
*>;
7532 tu_group
->tus
->push_back (sig_type
);
7534 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7535 pst
= create_partial_symtab (per_cu
, "");
7536 pst
->anonymous
= true;
7538 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7540 lowpc
= (CORE_ADDR
) -1;
7541 highpc
= (CORE_ADDR
) 0;
7542 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7544 end_psymtab_common (objfile
, pst
);
7547 /* Struct used to sort TUs by their abbreviation table offset. */
7549 struct tu_abbrev_offset
7551 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7552 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7555 signatured_type
*sig_type
;
7556 sect_offset abbrev_offset
;
7559 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7562 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7563 const struct tu_abbrev_offset
&b
)
7565 return a
.abbrev_offset
< b
.abbrev_offset
;
7568 /* Efficiently read all the type units.
7569 This does the bulk of the work for build_type_psymtabs.
7571 The efficiency is because we sort TUs by the abbrev table they use and
7572 only read each abbrev table once. In one program there are 200K TUs
7573 sharing 8K abbrev tables.
7575 The main purpose of this function is to support building the
7576 dwarf2_per_objfile->type_unit_groups table.
7577 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7578 can collapse the search space by grouping them by stmt_list.
7579 The savings can be significant, in the same program from above the 200K TUs
7580 share 8K stmt_list tables.
7582 FUNC is expected to call get_type_unit_group, which will create the
7583 struct type_unit_group if necessary and add it to
7584 dwarf2_per_objfile->type_unit_groups. */
7587 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7589 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7590 abbrev_table_up abbrev_table
;
7591 sect_offset abbrev_offset
;
7593 /* It's up to the caller to not call us multiple times. */
7594 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
7596 if (dwarf2_per_objfile
->all_type_units
.empty ())
7599 /* TUs typically share abbrev tables, and there can be way more TUs than
7600 abbrev tables. Sort by abbrev table to reduce the number of times we
7601 read each abbrev table in.
7602 Alternatives are to punt or to maintain a cache of abbrev tables.
7603 This is simpler and efficient enough for now.
7605 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7606 symtab to use). Typically TUs with the same abbrev offset have the same
7607 stmt_list value too so in practice this should work well.
7609 The basic algorithm here is:
7611 sort TUs by abbrev table
7612 for each TU with same abbrev table:
7613 read abbrev table if first user
7614 read TU top level DIE
7615 [IWBN if DWO skeletons had DW_AT_stmt_list]
7618 if (dwarf_read_debug
)
7619 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7621 /* Sort in a separate table to maintain the order of all_type_units
7622 for .gdb_index: TU indices directly index all_type_units. */
7623 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7624 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
7626 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
7627 sorted_by_abbrev
.emplace_back
7628 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
7629 sig_type
->per_cu
.section
,
7630 sig_type
->per_cu
.sect_off
));
7632 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7633 sort_tu_by_abbrev_offset
);
7635 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7637 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7639 /* Switch to the next abbrev table if necessary. */
7640 if (abbrev_table
== NULL
7641 || tu
.abbrev_offset
!= abbrev_offset
)
7643 abbrev_offset
= tu
.abbrev_offset
;
7645 abbrev_table::read (dwarf2_per_objfile
->objfile
,
7646 &dwarf2_per_objfile
->abbrev
,
7648 ++tu_stats
->nr_uniq_abbrev_tables
;
7651 cutu_reader
reader (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
7653 if (!reader
.dummy_p
)
7654 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7655 reader
.comp_unit_die
);
7659 /* Print collected type unit statistics. */
7662 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7664 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7666 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7667 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
7668 dwarf2_per_objfile
->all_type_units
.size ());
7669 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7670 tu_stats
->nr_uniq_abbrev_tables
);
7671 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7672 tu_stats
->nr_symtabs
);
7673 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7674 tu_stats
->nr_symtab_sharers
);
7675 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7676 tu_stats
->nr_stmt_less_type_units
);
7677 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7678 tu_stats
->nr_all_type_units_reallocs
);
7681 /* Traversal function for build_type_psymtabs. */
7684 build_type_psymtab_dependencies (void **slot
, void *info
)
7686 struct dwarf2_per_objfile
*dwarf2_per_objfile
7687 = (struct dwarf2_per_objfile
*) info
;
7688 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7689 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7690 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7691 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7692 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
7695 gdb_assert (len
> 0);
7696 gdb_assert (per_cu
->type_unit_group_p ());
7698 pst
->number_of_dependencies
= len
;
7699 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
7700 for (i
= 0; i
< len
; ++i
)
7702 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
7703 gdb_assert (iter
->per_cu
.is_debug_types
);
7704 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7705 iter
->type_unit_group
= tu_group
;
7708 delete tu_group
->tus
;
7709 tu_group
->tus
= nullptr;
7714 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7715 Build partial symbol tables for the .debug_types comp-units. */
7718 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7720 if (! create_all_type_units (dwarf2_per_objfile
))
7723 build_type_psymtabs_1 (dwarf2_per_objfile
);
7726 /* Traversal function for process_skeletonless_type_unit.
7727 Read a TU in a DWO file and build partial symbols for it. */
7730 process_skeletonless_type_unit (void **slot
, void *info
)
7732 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7733 struct dwarf2_per_objfile
*dwarf2_per_objfile
7734 = (struct dwarf2_per_objfile
*) info
;
7735 struct signatured_type find_entry
, *entry
;
7737 /* If this TU doesn't exist in the global table, add it and read it in. */
7739 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7740 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
7742 find_entry
.signature
= dwo_unit
->signature
;
7743 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
7744 &find_entry
, INSERT
);
7745 /* If we've already seen this type there's nothing to do. What's happening
7746 is we're doing our own version of comdat-folding here. */
7750 /* This does the job that create_all_type_units would have done for
7752 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
7753 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
7756 /* This does the job that build_type_psymtabs_1 would have done. */
7757 cutu_reader
reader (&entry
->per_cu
, NULL
, 0, false);
7758 if (!reader
.dummy_p
)
7759 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7760 reader
.comp_unit_die
);
7765 /* Traversal function for process_skeletonless_type_units. */
7768 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7770 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7772 if (dwo_file
->tus
!= NULL
)
7773 htab_traverse_noresize (dwo_file
->tus
.get (),
7774 process_skeletonless_type_unit
, info
);
7779 /* Scan all TUs of DWO files, verifying we've processed them.
7780 This is needed in case a TU was emitted without its skeleton.
7781 Note: This can't be done until we know what all the DWO files are. */
7784 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7786 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7787 if (get_dwp_file (dwarf2_per_objfile
) == NULL
7788 && dwarf2_per_objfile
->dwo_files
!= NULL
)
7790 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
7791 process_dwo_file_for_skeletonless_type_units
,
7792 dwarf2_per_objfile
);
7796 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
7799 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7801 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7803 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7808 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7810 /* Set the 'user' field only if it is not already set. */
7811 if (pst
->dependencies
[j
]->user
== NULL
)
7812 pst
->dependencies
[j
]->user
= pst
;
7817 /* Build the partial symbol table by doing a quick pass through the
7818 .debug_info and .debug_abbrev sections. */
7821 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7823 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7825 if (dwarf_read_debug
)
7827 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7828 objfile_name (objfile
));
7831 scoped_restore restore_reading_psyms
7832 = make_scoped_restore (&dwarf2_per_objfile
->reading_partial_symbols
,
7835 dwarf2_per_objfile
->info
.read (objfile
);
7837 /* Any cached compilation units will be linked by the per-objfile
7838 read_in_chain. Make sure to free them when we're done. */
7839 free_cached_comp_units
freer (dwarf2_per_objfile
);
7841 build_type_psymtabs (dwarf2_per_objfile
);
7843 create_all_comp_units (dwarf2_per_objfile
);
7845 /* Create a temporary address map on a temporary obstack. We later
7846 copy this to the final obstack. */
7847 auto_obstack temp_obstack
;
7849 scoped_restore save_psymtabs_addrmap
7850 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
7851 addrmap_create_mutable (&temp_obstack
));
7853 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7855 if (per_cu
->v
.psymtab
!= NULL
)
7856 /* In case a forward DW_TAG_imported_unit has read the CU already. */
7858 process_psymtab_comp_unit (per_cu
, false, language_minimal
);
7861 /* This has to wait until we read the CUs, we need the list of DWOs. */
7862 process_skeletonless_type_units (dwarf2_per_objfile
);
7864 /* Now that all TUs have been processed we can fill in the dependencies. */
7865 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
7867 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
.get (),
7868 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
7871 if (dwarf_read_debug
)
7872 print_tu_stats (dwarf2_per_objfile
);
7874 set_partial_user (dwarf2_per_objfile
);
7876 objfile
->partial_symtabs
->psymtabs_addrmap
7877 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
7878 objfile
->partial_symtabs
->obstack ());
7879 /* At this point we want to keep the address map. */
7880 save_psymtabs_addrmap
.release ();
7882 if (dwarf_read_debug
)
7883 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7884 objfile_name (objfile
));
7887 /* Load the partial DIEs for a secondary CU into memory.
7888 This is also used when rereading a primary CU with load_all_dies. */
7891 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
7893 cutu_reader
reader (this_cu
, NULL
, 1, false);
7895 if (!reader
.dummy_p
)
7897 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
7900 /* Check if comp unit has_children.
7901 If so, read the rest of the partial symbols from this comp unit.
7902 If not, there's no more debug_info for this comp unit. */
7903 if (reader
.comp_unit_die
->has_children
)
7904 load_partial_dies (&reader
, reader
.info_ptr
, 0);
7911 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
7912 struct dwarf2_section_info
*section
,
7913 struct dwarf2_section_info
*abbrev_section
,
7914 unsigned int is_dwz
)
7916 const gdb_byte
*info_ptr
;
7917 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7919 if (dwarf_read_debug
)
7920 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
7921 section
->get_name (),
7922 section
->get_file_name ());
7924 section
->read (objfile
);
7926 info_ptr
= section
->buffer
;
7928 while (info_ptr
< section
->buffer
+ section
->size
)
7930 struct dwarf2_per_cu_data
*this_cu
;
7932 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
7934 comp_unit_head cu_header
;
7935 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
7936 abbrev_section
, info_ptr
,
7937 rcuh_kind::COMPILE
);
7939 /* Save the compilation unit for later lookup. */
7940 if (cu_header
.unit_type
!= DW_UT_type
)
7942 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
7943 struct dwarf2_per_cu_data
);
7944 memset (this_cu
, 0, sizeof (*this_cu
));
7948 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
7949 struct signatured_type
);
7950 memset (sig_type
, 0, sizeof (*sig_type
));
7951 sig_type
->signature
= cu_header
.signature
;
7952 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
7953 this_cu
= &sig_type
->per_cu
;
7955 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
7956 this_cu
->sect_off
= sect_off
;
7957 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
7958 this_cu
->is_dwz
= is_dwz
;
7959 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7960 this_cu
->section
= section
;
7962 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
7964 info_ptr
= info_ptr
+ this_cu
->length
;
7968 /* Create a list of all compilation units in OBJFILE.
7969 This is only done for -readnow and building partial symtabs. */
7972 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7974 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
7975 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
7976 &dwarf2_per_objfile
->abbrev
, 0);
7978 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
7980 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
7984 /* Process all loaded DIEs for compilation unit CU, starting at
7985 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
7986 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
7987 DW_AT_ranges). See the comments of add_partial_subprogram on how
7988 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
7991 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
7992 CORE_ADDR
*highpc
, int set_addrmap
,
7993 struct dwarf2_cu
*cu
)
7995 struct partial_die_info
*pdi
;
7997 /* Now, march along the PDI's, descending into ones which have
7998 interesting children but skipping the children of the other ones,
7999 until we reach the end of the compilation unit. */
8007 /* Anonymous namespaces or modules have no name but have interesting
8008 children, so we need to look at them. Ditto for anonymous
8011 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8012 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8013 || pdi
->tag
== DW_TAG_imported_unit
8014 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8018 case DW_TAG_subprogram
:
8019 case DW_TAG_inlined_subroutine
:
8020 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8022 case DW_TAG_constant
:
8023 case DW_TAG_variable
:
8024 case DW_TAG_typedef
:
8025 case DW_TAG_union_type
:
8026 if (!pdi
->is_declaration
8027 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
8029 add_partial_symbol (pdi
, cu
);
8032 case DW_TAG_class_type
:
8033 case DW_TAG_interface_type
:
8034 case DW_TAG_structure_type
:
8035 if (!pdi
->is_declaration
)
8037 add_partial_symbol (pdi
, cu
);
8039 if ((cu
->language
== language_rust
8040 || cu
->language
== language_cplus
) && pdi
->has_children
)
8041 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8044 case DW_TAG_enumeration_type
:
8045 if (!pdi
->is_declaration
)
8046 add_partial_enumeration (pdi
, cu
);
8048 case DW_TAG_base_type
:
8049 case DW_TAG_subrange_type
:
8050 /* File scope base type definitions are added to the partial
8052 add_partial_symbol (pdi
, cu
);
8054 case DW_TAG_namespace
:
8055 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8058 if (!pdi
->is_declaration
)
8059 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8061 case DW_TAG_imported_unit
:
8063 struct dwarf2_per_cu_data
*per_cu
;
8065 /* For now we don't handle imported units in type units. */
8066 if (cu
->per_cu
->is_debug_types
)
8068 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8069 " supported in type units [in module %s]"),
8070 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8073 per_cu
= dwarf2_find_containing_comp_unit
8074 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8075 cu
->per_cu
->dwarf2_per_objfile
);
8077 /* Go read the partial unit, if needed. */
8078 if (per_cu
->v
.psymtab
== NULL
)
8079 process_psymtab_comp_unit (per_cu
, true, cu
->language
);
8081 cu
->per_cu
->imported_symtabs_push (per_cu
);
8084 case DW_TAG_imported_declaration
:
8085 add_partial_symbol (pdi
, cu
);
8092 /* If the die has a sibling, skip to the sibling. */
8094 pdi
= pdi
->die_sibling
;
8098 /* Functions used to compute the fully scoped name of a partial DIE.
8100 Normally, this is simple. For C++, the parent DIE's fully scoped
8101 name is concatenated with "::" and the partial DIE's name.
8102 Enumerators are an exception; they use the scope of their parent
8103 enumeration type, i.e. the name of the enumeration type is not
8104 prepended to the enumerator.
8106 There are two complexities. One is DW_AT_specification; in this
8107 case "parent" means the parent of the target of the specification,
8108 instead of the direct parent of the DIE. The other is compilers
8109 which do not emit DW_TAG_namespace; in this case we try to guess
8110 the fully qualified name of structure types from their members'
8111 linkage names. This must be done using the DIE's children rather
8112 than the children of any DW_AT_specification target. We only need
8113 to do this for structures at the top level, i.e. if the target of
8114 any DW_AT_specification (if any; otherwise the DIE itself) does not
8117 /* Compute the scope prefix associated with PDI's parent, in
8118 compilation unit CU. The result will be allocated on CU's
8119 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8120 field. NULL is returned if no prefix is necessary. */
8122 partial_die_parent_scope (struct partial_die_info
*pdi
,
8123 struct dwarf2_cu
*cu
)
8125 const char *grandparent_scope
;
8126 struct partial_die_info
*parent
, *real_pdi
;
8128 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8129 then this means the parent of the specification DIE. */
8132 while (real_pdi
->has_specification
)
8134 auto res
= find_partial_die (real_pdi
->spec_offset
,
8135 real_pdi
->spec_is_dwz
, cu
);
8140 parent
= real_pdi
->die_parent
;
8144 if (parent
->scope_set
)
8145 return parent
->scope
;
8149 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8151 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8152 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8153 Work around this problem here. */
8154 if (cu
->language
== language_cplus
8155 && parent
->tag
== DW_TAG_namespace
8156 && strcmp (parent
->name
, "::") == 0
8157 && grandparent_scope
== NULL
)
8159 parent
->scope
= NULL
;
8160 parent
->scope_set
= 1;
8164 /* Nested subroutines in Fortran get a prefix. */
8165 if (pdi
->tag
== DW_TAG_enumerator
)
8166 /* Enumerators should not get the name of the enumeration as a prefix. */
8167 parent
->scope
= grandparent_scope
;
8168 else if (parent
->tag
== DW_TAG_namespace
8169 || parent
->tag
== DW_TAG_module
8170 || parent
->tag
== DW_TAG_structure_type
8171 || parent
->tag
== DW_TAG_class_type
8172 || parent
->tag
== DW_TAG_interface_type
8173 || parent
->tag
== DW_TAG_union_type
8174 || parent
->tag
== DW_TAG_enumeration_type
8175 || (cu
->language
== language_fortran
8176 && parent
->tag
== DW_TAG_subprogram
8177 && pdi
->tag
== DW_TAG_subprogram
))
8179 if (grandparent_scope
== NULL
)
8180 parent
->scope
= parent
->name
;
8182 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8184 parent
->name
, 0, cu
);
8188 /* FIXME drow/2004-04-01: What should we be doing with
8189 function-local names? For partial symbols, we should probably be
8191 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8192 dwarf_tag_name (parent
->tag
),
8193 sect_offset_str (pdi
->sect_off
));
8194 parent
->scope
= grandparent_scope
;
8197 parent
->scope_set
= 1;
8198 return parent
->scope
;
8201 /* Return the fully scoped name associated with PDI, from compilation unit
8202 CU. The result will be allocated with malloc. */
8204 static gdb::unique_xmalloc_ptr
<char>
8205 partial_die_full_name (struct partial_die_info
*pdi
,
8206 struct dwarf2_cu
*cu
)
8208 const char *parent_scope
;
8210 /* If this is a template instantiation, we can not work out the
8211 template arguments from partial DIEs. So, unfortunately, we have
8212 to go through the full DIEs. At least any work we do building
8213 types here will be reused if full symbols are loaded later. */
8214 if (pdi
->has_template_arguments
)
8218 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8220 struct die_info
*die
;
8221 struct attribute attr
;
8222 struct dwarf2_cu
*ref_cu
= cu
;
8224 /* DW_FORM_ref_addr is using section offset. */
8225 attr
.name
= (enum dwarf_attribute
) 0;
8226 attr
.form
= DW_FORM_ref_addr
;
8227 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8228 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8230 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8234 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8235 if (parent_scope
== NULL
)
8238 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8243 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8245 struct dwarf2_per_objfile
*dwarf2_per_objfile
8246 = cu
->per_cu
->dwarf2_per_objfile
;
8247 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8248 struct gdbarch
*gdbarch
= objfile
->arch ();
8250 const char *actual_name
= NULL
;
8253 baseaddr
= objfile
->text_section_offset ();
8255 gdb::unique_xmalloc_ptr
<char> built_actual_name
8256 = partial_die_full_name (pdi
, cu
);
8257 if (built_actual_name
!= NULL
)
8258 actual_name
= built_actual_name
.get ();
8260 if (actual_name
== NULL
)
8261 actual_name
= pdi
->name
;
8263 partial_symbol psymbol
;
8264 memset (&psymbol
, 0, sizeof (psymbol
));
8265 psymbol
.ginfo
.set_language (cu
->language
, &objfile
->objfile_obstack
);
8266 psymbol
.ginfo
.section
= -1;
8268 /* The code below indicates that the psymbol should be installed by
8270 gdb::optional
<psymbol_placement
> where
;
8274 case DW_TAG_inlined_subroutine
:
8275 case DW_TAG_subprogram
:
8276 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8278 if (pdi
->is_external
8279 || cu
->language
== language_ada
8280 || (cu
->language
== language_fortran
8281 && pdi
->die_parent
!= NULL
8282 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8284 /* Normally, only "external" DIEs are part of the global scope.
8285 But in Ada and Fortran, we want to be able to access nested
8286 procedures globally. So all Ada and Fortran subprograms are
8287 stored in the global scope. */
8288 where
= psymbol_placement::GLOBAL
;
8291 where
= psymbol_placement::STATIC
;
8293 psymbol
.domain
= VAR_DOMAIN
;
8294 psymbol
.aclass
= LOC_BLOCK
;
8295 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8296 psymbol
.ginfo
.value
.address
= addr
;
8298 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8299 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8301 case DW_TAG_constant
:
8302 psymbol
.domain
= VAR_DOMAIN
;
8303 psymbol
.aclass
= LOC_STATIC
;
8304 where
= (pdi
->is_external
8305 ? psymbol_placement::GLOBAL
8306 : psymbol_placement::STATIC
);
8308 case DW_TAG_variable
:
8310 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8314 && !dwarf2_per_objfile
->has_section_at_zero
)
8316 /* A global or static variable may also have been stripped
8317 out by the linker if unused, in which case its address
8318 will be nullified; do not add such variables into partial
8319 symbol table then. */
8321 else if (pdi
->is_external
)
8324 Don't enter into the minimal symbol tables as there is
8325 a minimal symbol table entry from the ELF symbols already.
8326 Enter into partial symbol table if it has a location
8327 descriptor or a type.
8328 If the location descriptor is missing, new_symbol will create
8329 a LOC_UNRESOLVED symbol, the address of the variable will then
8330 be determined from the minimal symbol table whenever the variable
8332 The address for the partial symbol table entry is not
8333 used by GDB, but it comes in handy for debugging partial symbol
8336 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8338 psymbol
.domain
= VAR_DOMAIN
;
8339 psymbol
.aclass
= LOC_STATIC
;
8340 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8341 psymbol
.ginfo
.value
.address
= addr
;
8342 where
= psymbol_placement::GLOBAL
;
8347 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8349 /* Static Variable. Skip symbols whose value we cannot know (those
8350 without location descriptors or constant values). */
8351 if (!has_loc
&& !pdi
->has_const_value
)
8354 psymbol
.domain
= VAR_DOMAIN
;
8355 psymbol
.aclass
= LOC_STATIC
;
8356 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8358 psymbol
.ginfo
.value
.address
= addr
;
8359 where
= psymbol_placement::STATIC
;
8362 case DW_TAG_typedef
:
8363 case DW_TAG_base_type
:
8364 case DW_TAG_subrange_type
:
8365 psymbol
.domain
= VAR_DOMAIN
;
8366 psymbol
.aclass
= LOC_TYPEDEF
;
8367 where
= psymbol_placement::STATIC
;
8369 case DW_TAG_imported_declaration
:
8370 case DW_TAG_namespace
:
8371 psymbol
.domain
= VAR_DOMAIN
;
8372 psymbol
.aclass
= LOC_TYPEDEF
;
8373 where
= psymbol_placement::GLOBAL
;
8376 /* With Fortran 77 there might be a "BLOCK DATA" module
8377 available without any name. If so, we skip the module as it
8378 doesn't bring any value. */
8379 if (actual_name
!= nullptr)
8381 psymbol
.domain
= MODULE_DOMAIN
;
8382 psymbol
.aclass
= LOC_TYPEDEF
;
8383 where
= psymbol_placement::GLOBAL
;
8386 case DW_TAG_class_type
:
8387 case DW_TAG_interface_type
:
8388 case DW_TAG_structure_type
:
8389 case DW_TAG_union_type
:
8390 case DW_TAG_enumeration_type
:
8391 /* Skip external references. The DWARF standard says in the section
8392 about "Structure, Union, and Class Type Entries": "An incomplete
8393 structure, union or class type is represented by a structure,
8394 union or class entry that does not have a byte size attribute
8395 and that has a DW_AT_declaration attribute." */
8396 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8399 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8400 static vs. global. */
8401 psymbol
.domain
= STRUCT_DOMAIN
;
8402 psymbol
.aclass
= LOC_TYPEDEF
;
8403 where
= (cu
->language
== language_cplus
8404 ? psymbol_placement::GLOBAL
8405 : psymbol_placement::STATIC
);
8407 case DW_TAG_enumerator
:
8408 psymbol
.domain
= VAR_DOMAIN
;
8409 psymbol
.aclass
= LOC_CONST
;
8410 where
= (cu
->language
== language_cplus
8411 ? psymbol_placement::GLOBAL
8412 : psymbol_placement::STATIC
);
8418 if (where
.has_value ())
8420 if (built_actual_name
!= nullptr)
8421 actual_name
= objfile
->intern (actual_name
);
8422 if (pdi
->linkage_name
== nullptr || cu
->language
== language_ada
)
8423 psymbol
.ginfo
.set_linkage_name (actual_name
);
8426 psymbol
.ginfo
.set_demangled_name (actual_name
,
8427 &objfile
->objfile_obstack
);
8428 psymbol
.ginfo
.set_linkage_name (pdi
->linkage_name
);
8430 add_psymbol_to_list (psymbol
, *where
, objfile
);
8434 /* Read a partial die corresponding to a namespace; also, add a symbol
8435 corresponding to that namespace to the symbol table. NAMESPACE is
8436 the name of the enclosing namespace. */
8439 add_partial_namespace (struct partial_die_info
*pdi
,
8440 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8441 int set_addrmap
, struct dwarf2_cu
*cu
)
8443 /* Add a symbol for the namespace. */
8445 add_partial_symbol (pdi
, cu
);
8447 /* Now scan partial symbols in that namespace. */
8449 if (pdi
->has_children
)
8450 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8453 /* Read a partial die corresponding to a Fortran module. */
8456 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8457 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8459 /* Add a symbol for the namespace. */
8461 add_partial_symbol (pdi
, cu
);
8463 /* Now scan partial symbols in that module. */
8465 if (pdi
->has_children
)
8466 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8469 /* Read a partial die corresponding to a subprogram or an inlined
8470 subprogram and create a partial symbol for that subprogram.
8471 When the CU language allows it, this routine also defines a partial
8472 symbol for each nested subprogram that this subprogram contains.
8473 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8474 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8476 PDI may also be a lexical block, in which case we simply search
8477 recursively for subprograms defined inside that lexical block.
8478 Again, this is only performed when the CU language allows this
8479 type of definitions. */
8482 add_partial_subprogram (struct partial_die_info
*pdi
,
8483 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8484 int set_addrmap
, struct dwarf2_cu
*cu
)
8486 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8488 if (pdi
->has_pc_info
)
8490 if (pdi
->lowpc
< *lowpc
)
8491 *lowpc
= pdi
->lowpc
;
8492 if (pdi
->highpc
> *highpc
)
8493 *highpc
= pdi
->highpc
;
8496 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
8497 struct gdbarch
*gdbarch
= objfile
->arch ();
8499 CORE_ADDR this_highpc
;
8500 CORE_ADDR this_lowpc
;
8502 baseaddr
= objfile
->text_section_offset ();
8504 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8505 pdi
->lowpc
+ baseaddr
)
8508 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8509 pdi
->highpc
+ baseaddr
)
8511 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8512 this_lowpc
, this_highpc
- 1,
8513 cu
->per_cu
->v
.psymtab
);
8517 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8519 if (!pdi
->is_declaration
)
8520 /* Ignore subprogram DIEs that do not have a name, they are
8521 illegal. Do not emit a complaint at this point, we will
8522 do so when we convert this psymtab into a symtab. */
8524 add_partial_symbol (pdi
, cu
);
8528 if (! pdi
->has_children
)
8531 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8533 pdi
= pdi
->die_child
;
8537 if (pdi
->tag
== DW_TAG_subprogram
8538 || pdi
->tag
== DW_TAG_inlined_subroutine
8539 || pdi
->tag
== DW_TAG_lexical_block
)
8540 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8541 pdi
= pdi
->die_sibling
;
8546 /* Read a partial die corresponding to an enumeration type. */
8549 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8550 struct dwarf2_cu
*cu
)
8552 struct partial_die_info
*pdi
;
8554 if (enum_pdi
->name
!= NULL
)
8555 add_partial_symbol (enum_pdi
, cu
);
8557 pdi
= enum_pdi
->die_child
;
8560 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8561 complaint (_("malformed enumerator DIE ignored"));
8563 add_partial_symbol (pdi
, cu
);
8564 pdi
= pdi
->die_sibling
;
8568 /* Return the initial uleb128 in the die at INFO_PTR. */
8571 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8573 unsigned int bytes_read
;
8575 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8578 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8579 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8581 Return the corresponding abbrev, or NULL if the number is zero (indicating
8582 an empty DIE). In either case *BYTES_READ will be set to the length of
8583 the initial number. */
8585 static struct abbrev_info
*
8586 peek_die_abbrev (const die_reader_specs
&reader
,
8587 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8589 dwarf2_cu
*cu
= reader
.cu
;
8590 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
8591 unsigned int abbrev_number
8592 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8594 if (abbrev_number
== 0)
8597 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8600 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8601 " at offset %s [in module %s]"),
8602 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8603 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8609 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8610 Returns a pointer to the end of a series of DIEs, terminated by an empty
8611 DIE. Any children of the skipped DIEs will also be skipped. */
8613 static const gdb_byte
*
8614 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8618 unsigned int bytes_read
;
8619 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8622 return info_ptr
+ bytes_read
;
8624 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8628 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8629 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8630 abbrev corresponding to that skipped uleb128 should be passed in
8631 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8634 static const gdb_byte
*
8635 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8636 struct abbrev_info
*abbrev
)
8638 unsigned int bytes_read
;
8639 struct attribute attr
;
8640 bfd
*abfd
= reader
->abfd
;
8641 struct dwarf2_cu
*cu
= reader
->cu
;
8642 const gdb_byte
*buffer
= reader
->buffer
;
8643 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8644 unsigned int form
, i
;
8646 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8648 /* The only abbrev we care about is DW_AT_sibling. */
8649 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8652 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
,
8654 if (attr
.form
== DW_FORM_ref_addr
)
8655 complaint (_("ignoring absolute DW_AT_sibling"));
8658 sect_offset off
= attr
.get_ref_die_offset ();
8659 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8661 if (sibling_ptr
< info_ptr
)
8662 complaint (_("DW_AT_sibling points backwards"));
8663 else if (sibling_ptr
> reader
->buffer_end
)
8664 reader
->die_section
->overflow_complaint ();
8670 /* If it isn't DW_AT_sibling, skip this attribute. */
8671 form
= abbrev
->attrs
[i
].form
;
8675 case DW_FORM_ref_addr
:
8676 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8677 and later it is offset sized. */
8678 if (cu
->header
.version
== 2)
8679 info_ptr
+= cu
->header
.addr_size
;
8681 info_ptr
+= cu
->header
.offset_size
;
8683 case DW_FORM_GNU_ref_alt
:
8684 info_ptr
+= cu
->header
.offset_size
;
8687 info_ptr
+= cu
->header
.addr_size
;
8695 case DW_FORM_flag_present
:
8696 case DW_FORM_implicit_const
:
8713 case DW_FORM_ref_sig8
:
8716 case DW_FORM_data16
:
8719 case DW_FORM_string
:
8720 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8721 info_ptr
+= bytes_read
;
8723 case DW_FORM_sec_offset
:
8725 case DW_FORM_GNU_strp_alt
:
8726 info_ptr
+= cu
->header
.offset_size
;
8728 case DW_FORM_exprloc
:
8730 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8731 info_ptr
+= bytes_read
;
8733 case DW_FORM_block1
:
8734 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8736 case DW_FORM_block2
:
8737 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8739 case DW_FORM_block4
:
8740 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8746 case DW_FORM_ref_udata
:
8747 case DW_FORM_GNU_addr_index
:
8748 case DW_FORM_GNU_str_index
:
8749 case DW_FORM_rnglistx
:
8750 case DW_FORM_loclistx
:
8751 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8753 case DW_FORM_indirect
:
8754 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8755 info_ptr
+= bytes_read
;
8756 /* We need to continue parsing from here, so just go back to
8758 goto skip_attribute
;
8761 error (_("Dwarf Error: Cannot handle %s "
8762 "in DWARF reader [in module %s]"),
8763 dwarf_form_name (form
),
8764 bfd_get_filename (abfd
));
8768 if (abbrev
->has_children
)
8769 return skip_children (reader
, info_ptr
);
8774 /* Locate ORIG_PDI's sibling.
8775 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8777 static const gdb_byte
*
8778 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8779 struct partial_die_info
*orig_pdi
,
8780 const gdb_byte
*info_ptr
)
8782 /* Do we know the sibling already? */
8784 if (orig_pdi
->sibling
)
8785 return orig_pdi
->sibling
;
8787 /* Are there any children to deal with? */
8789 if (!orig_pdi
->has_children
)
8792 /* Skip the children the long way. */
8794 return skip_children (reader
, info_ptr
);
8797 /* Expand this partial symbol table into a full symbol table. SELF is
8801 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
8803 struct dwarf2_per_objfile
*dwarf2_per_objfile
8804 = get_dwarf2_per_objfile (objfile
);
8806 gdb_assert (!readin
);
8807 /* If this psymtab is constructed from a debug-only objfile, the
8808 has_section_at_zero flag will not necessarily be correct. We
8809 can get the correct value for this flag by looking at the data
8810 associated with the (presumably stripped) associated objfile. */
8811 if (objfile
->separate_debug_objfile_backlink
)
8813 struct dwarf2_per_objfile
*dpo_backlink
8814 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
8816 dwarf2_per_objfile
->has_section_at_zero
8817 = dpo_backlink
->has_section_at_zero
;
8820 expand_psymtab (objfile
);
8822 process_cu_includes (dwarf2_per_objfile
);
8825 /* Reading in full CUs. */
8827 /* Add PER_CU to the queue. */
8830 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8831 enum language pretend_language
)
8834 per_cu
->dwarf2_per_objfile
->queue
.emplace (per_cu
, pretend_language
);
8837 /* If PER_CU is not yet queued, add it to the queue.
8838 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
8840 The result is non-zero if PER_CU was queued, otherwise the result is zero
8841 meaning either PER_CU is already queued or it is already loaded.
8843 N.B. There is an invariant here that if a CU is queued then it is loaded.
8844 The caller is required to load PER_CU if we return non-zero. */
8847 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
8848 struct dwarf2_per_cu_data
*per_cu
,
8849 enum language pretend_language
)
8851 /* We may arrive here during partial symbol reading, if we need full
8852 DIEs to process an unusual case (e.g. template arguments). Do
8853 not queue PER_CU, just tell our caller to load its DIEs. */
8854 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
8856 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
8861 /* Mark the dependence relation so that we don't flush PER_CU
8863 if (dependent_cu
!= NULL
)
8864 dwarf2_add_dependence (dependent_cu
, per_cu
);
8866 /* If it's already on the queue, we have nothing to do. */
8870 /* If the compilation unit is already loaded, just mark it as
8872 if (per_cu
->cu
!= NULL
)
8874 per_cu
->cu
->last_used
= 0;
8878 /* Add it to the queue. */
8879 queue_comp_unit (per_cu
, pretend_language
);
8884 /* Process the queue. */
8887 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8889 if (dwarf_read_debug
)
8891 fprintf_unfiltered (gdb_stdlog
,
8892 "Expanding one or more symtabs of objfile %s ...\n",
8893 objfile_name (dwarf2_per_objfile
->objfile
));
8896 /* The queue starts out with one item, but following a DIE reference
8897 may load a new CU, adding it to the end of the queue. */
8898 while (!dwarf2_per_objfile
->queue
.empty ())
8900 dwarf2_queue_item
&item
= dwarf2_per_objfile
->queue
.front ();
8902 if ((dwarf2_per_objfile
->using_index
8903 ? !item
.per_cu
->v
.quick
->compunit_symtab
8904 : (item
.per_cu
->v
.psymtab
&& !item
.per_cu
->v
.psymtab
->readin
))
8905 /* Skip dummy CUs. */
8906 && item
.per_cu
->cu
!= NULL
)
8908 struct dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
8909 unsigned int debug_print_threshold
;
8912 if (per_cu
->is_debug_types
)
8914 struct signatured_type
*sig_type
=
8915 (struct signatured_type
*) per_cu
;
8917 sprintf (buf
, "TU %s at offset %s",
8918 hex_string (sig_type
->signature
),
8919 sect_offset_str (per_cu
->sect_off
));
8920 /* There can be 100s of TUs.
8921 Only print them in verbose mode. */
8922 debug_print_threshold
= 2;
8926 sprintf (buf
, "CU at offset %s",
8927 sect_offset_str (per_cu
->sect_off
));
8928 debug_print_threshold
= 1;
8931 if (dwarf_read_debug
>= debug_print_threshold
)
8932 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
8934 if (per_cu
->is_debug_types
)
8935 process_full_type_unit (per_cu
, item
.pretend_language
);
8937 process_full_comp_unit (per_cu
, item
.pretend_language
);
8939 if (dwarf_read_debug
>= debug_print_threshold
)
8940 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
8943 item
.per_cu
->queued
= 0;
8944 dwarf2_per_objfile
->queue
.pop ();
8947 if (dwarf_read_debug
)
8949 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
8950 objfile_name (dwarf2_per_objfile
->objfile
));
8954 /* Read in full symbols for PST, and anything it depends on. */
8957 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
8959 gdb_assert (!readin
);
8961 expand_dependencies (objfile
);
8963 dw2_do_instantiate_symtab (per_cu_data
, false);
8964 gdb_assert (get_compunit_symtab () != nullptr);
8967 /* Trivial hash function for die_info: the hash value of a DIE
8968 is its offset in .debug_info for this objfile. */
8971 die_hash (const void *item
)
8973 const struct die_info
*die
= (const struct die_info
*) item
;
8975 return to_underlying (die
->sect_off
);
8978 /* Trivial comparison function for die_info structures: two DIEs
8979 are equal if they have the same offset. */
8982 die_eq (const void *item_lhs
, const void *item_rhs
)
8984 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
8985 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
8987 return die_lhs
->sect_off
== die_rhs
->sect_off
;
8990 /* Load the DIEs associated with PER_CU into memory. */
8993 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8995 enum language pretend_language
)
8997 gdb_assert (! this_cu
->is_debug_types
);
8999 cutu_reader
reader (this_cu
, NULL
, 1, skip_partial
);
9003 struct dwarf2_cu
*cu
= reader
.cu
;
9004 const gdb_byte
*info_ptr
= reader
.info_ptr
;
9006 gdb_assert (cu
->die_hash
== NULL
);
9008 htab_create_alloc_ex (cu
->header
.length
/ 12,
9012 &cu
->comp_unit_obstack
,
9013 hashtab_obstack_allocate
,
9014 dummy_obstack_deallocate
);
9016 if (reader
.comp_unit_die
->has_children
)
9017 reader
.comp_unit_die
->child
9018 = read_die_and_siblings (&reader
, reader
.info_ptr
,
9019 &info_ptr
, reader
.comp_unit_die
);
9020 cu
->dies
= reader
.comp_unit_die
;
9021 /* comp_unit_die is not stored in die_hash, no need. */
9023 /* We try not to read any attributes in this function, because not
9024 all CUs needed for references have been loaded yet, and symbol
9025 table processing isn't initialized. But we have to set the CU language,
9026 or we won't be able to build types correctly.
9027 Similarly, if we do not read the producer, we can not apply
9028 producer-specific interpretation. */
9029 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
9034 /* Add a DIE to the delayed physname list. */
9037 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9038 const char *name
, struct die_info
*die
,
9039 struct dwarf2_cu
*cu
)
9041 struct delayed_method_info mi
;
9043 mi
.fnfield_index
= fnfield_index
;
9047 cu
->method_list
.push_back (mi
);
9050 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9051 "const" / "volatile". If so, decrements LEN by the length of the
9052 modifier and return true. Otherwise return false. */
9056 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9058 size_t mod_len
= sizeof (mod
) - 1;
9059 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9067 /* Compute the physnames of any methods on the CU's method list.
9069 The computation of method physnames is delayed in order to avoid the
9070 (bad) condition that one of the method's formal parameters is of an as yet
9074 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9076 /* Only C++ delays computing physnames. */
9077 if (cu
->method_list
.empty ())
9079 gdb_assert (cu
->language
== language_cplus
);
9081 for (const delayed_method_info
&mi
: cu
->method_list
)
9083 const char *physname
;
9084 struct fn_fieldlist
*fn_flp
9085 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9086 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9087 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9088 = physname
? physname
: "";
9090 /* Since there's no tag to indicate whether a method is a
9091 const/volatile overload, extract that information out of the
9093 if (physname
!= NULL
)
9095 size_t len
= strlen (physname
);
9099 if (physname
[len
] == ')') /* shortcut */
9101 else if (check_modifier (physname
, len
, " const"))
9102 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9103 else if (check_modifier (physname
, len
, " volatile"))
9104 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9111 /* The list is no longer needed. */
9112 cu
->method_list
.clear ();
9115 /* Go objects should be embedded in a DW_TAG_module DIE,
9116 and it's not clear if/how imported objects will appear.
9117 To keep Go support simple until that's worked out,
9118 go back through what we've read and create something usable.
9119 We could do this while processing each DIE, and feels kinda cleaner,
9120 but that way is more invasive.
9121 This is to, for example, allow the user to type "p var" or "b main"
9122 without having to specify the package name, and allow lookups
9123 of module.object to work in contexts that use the expression
9127 fixup_go_packaging (struct dwarf2_cu
*cu
)
9129 gdb::unique_xmalloc_ptr
<char> package_name
;
9130 struct pending
*list
;
9133 for (list
= *cu
->get_builder ()->get_global_symbols ();
9137 for (i
= 0; i
< list
->nsyms
; ++i
)
9139 struct symbol
*sym
= list
->symbol
[i
];
9141 if (sym
->language () == language_go
9142 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9144 gdb::unique_xmalloc_ptr
<char> this_package_name
9145 (go_symbol_package_name (sym
));
9147 if (this_package_name
== NULL
)
9149 if (package_name
== NULL
)
9150 package_name
= std::move (this_package_name
);
9153 struct objfile
*objfile
9154 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9155 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9156 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9157 (symbol_symtab (sym
) != NULL
9158 ? symtab_to_filename_for_display
9159 (symbol_symtab (sym
))
9160 : objfile_name (objfile
)),
9161 this_package_name
.get (), package_name
.get ());
9167 if (package_name
!= NULL
)
9169 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9170 const char *saved_package_name
= objfile
->intern (package_name
.get ());
9171 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9172 saved_package_name
);
9175 sym
= allocate_symbol (objfile
);
9176 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9177 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9178 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9179 e.g., "main" finds the "main" module and not C's main(). */
9180 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9181 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9182 SYMBOL_TYPE (sym
) = type
;
9184 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9188 /* Allocate a fully-qualified name consisting of the two parts on the
9192 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9194 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9197 /* A helper that allocates a variant part to attach to a Rust enum
9198 type. OBSTACK is where the results should be allocated. TYPE is
9199 the type we're processing. DISCRIMINANT_INDEX is the index of the
9200 discriminant. It must be the index of one of the fields of TYPE.
9201 DEFAULT_INDEX is the index of the default field; or -1 if there is
9202 no default. RANGES is indexed by "effective" field number (the
9203 field index, but omitting the discriminant and default fields) and
9204 must hold the discriminant values used by the variants. Note that
9205 RANGES must have a lifetime at least as long as OBSTACK -- either
9206 already allocated on it, or static. */
9209 alloc_rust_variant (struct obstack
*obstack
, struct type
*type
,
9210 int discriminant_index
, int default_index
,
9211 gdb::array_view
<discriminant_range
> ranges
)
9213 /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. Those
9214 must be handled by the caller. */
9215 gdb_assert (discriminant_index
>= 0
9216 && discriminant_index
< TYPE_NFIELDS (type
));
9217 gdb_assert (default_index
== -1
9218 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9220 /* We have one variant for each non-discriminant field. */
9221 int n_variants
= TYPE_NFIELDS (type
) - 1;
9223 variant
*variants
= new (obstack
) variant
[n_variants
];
9226 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9228 if (i
== discriminant_index
)
9231 variants
[var_idx
].first_field
= i
;
9232 variants
[var_idx
].last_field
= i
+ 1;
9234 /* The default field does not need a range, but other fields do.
9235 We skipped the discriminant above. */
9236 if (i
!= default_index
)
9238 variants
[var_idx
].discriminants
= ranges
.slice (range_idx
, 1);
9245 gdb_assert (range_idx
== ranges
.size ());
9246 gdb_assert (var_idx
== n_variants
);
9248 variant_part
*part
= new (obstack
) variant_part
;
9249 part
->discriminant_index
= discriminant_index
;
9250 part
->is_unsigned
= TYPE_UNSIGNED (TYPE_FIELD_TYPE (type
,
9251 discriminant_index
));
9252 part
->variants
= gdb::array_view
<variant
> (variants
, n_variants
);
9254 void *storage
= obstack_alloc (obstack
, sizeof (gdb::array_view
<variant_part
>));
9255 gdb::array_view
<variant_part
> *prop_value
9256 = new (storage
) gdb::array_view
<variant_part
> (part
, 1);
9258 struct dynamic_prop prop
;
9259 prop
.kind
= PROP_VARIANT_PARTS
;
9260 prop
.data
.variant_parts
= prop_value
;
9262 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
9265 /* Some versions of rustc emitted enums in an unusual way.
9267 Ordinary enums were emitted as unions. The first element of each
9268 structure in the union was named "RUST$ENUM$DISR". This element
9269 held the discriminant.
9271 These versions of Rust also implemented the "non-zero"
9272 optimization. When the enum had two values, and one is empty and
9273 the other holds a pointer that cannot be zero, the pointer is used
9274 as the discriminant, with a zero value meaning the empty variant.
9275 Here, the union's first member is of the form
9276 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9277 where the fieldnos are the indices of the fields that should be
9278 traversed in order to find the field (which may be several fields deep)
9279 and the variantname is the name of the variant of the case when the
9282 This function recognizes whether TYPE is of one of these forms,
9283 and, if so, smashes it to be a variant type. */
9286 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9288 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9290 /* We don't need to deal with empty enums. */
9291 if (TYPE_NFIELDS (type
) == 0)
9294 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9295 if (TYPE_NFIELDS (type
) == 1
9296 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9298 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9300 /* Decode the field name to find the offset of the
9302 ULONGEST bit_offset
= 0;
9303 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9304 while (name
[0] >= '0' && name
[0] <= '9')
9307 unsigned long index
= strtoul (name
, &tail
, 10);
9310 || index
>= TYPE_NFIELDS (field_type
)
9311 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9312 != FIELD_LOC_KIND_BITPOS
))
9314 complaint (_("Could not parse Rust enum encoding string \"%s\""
9316 TYPE_FIELD_NAME (type
, 0),
9317 objfile_name (objfile
));
9322 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9323 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9326 /* Smash this type to be a structure type. We have to do this
9327 because the type has already been recorded. */
9328 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9329 TYPE_NFIELDS (type
) = 3;
9330 /* Save the field we care about. */
9331 struct field saved_field
= TYPE_FIELD (type
, 0);
9333 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9335 /* Put the discriminant at index 0. */
9336 TYPE_FIELD_TYPE (type
, 0) = field_type
;
9337 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9338 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9339 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), bit_offset
);
9341 /* The order of fields doesn't really matter, so put the real
9342 field at index 1 and the data-less field at index 2. */
9343 TYPE_FIELD (type
, 1) = saved_field
;
9344 TYPE_FIELD_NAME (type
, 1)
9345 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (type
, 1)));
9346 TYPE_NAME (TYPE_FIELD_TYPE (type
, 1))
9347 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9348 TYPE_FIELD_NAME (type
, 1));
9350 const char *dataless_name
9351 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9353 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9355 TYPE_FIELD_TYPE (type
, 2) = dataless_type
;
9356 /* NAME points into the original discriminant name, which
9357 already has the correct lifetime. */
9358 TYPE_FIELD_NAME (type
, 2) = name
;
9359 SET_FIELD_BITPOS (TYPE_FIELD (type
, 2), 0);
9361 /* Indicate that this is a variant type. */
9362 static discriminant_range ranges
[1] = { { 0, 0 } };
9363 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1, ranges
);
9365 /* A union with a single anonymous field is probably an old-style
9367 else if (TYPE_NFIELDS (type
) == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9369 /* Smash this type to be a structure type. We have to do this
9370 because the type has already been recorded. */
9371 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9373 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9374 const char *variant_name
9375 = rust_last_path_segment (TYPE_NAME (field_type
));
9376 TYPE_FIELD_NAME (type
, 0) = variant_name
;
9377 TYPE_NAME (field_type
)
9378 = rust_fully_qualify (&objfile
->objfile_obstack
,
9379 TYPE_NAME (type
), variant_name
);
9383 struct type
*disr_type
= nullptr;
9384 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9386 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9388 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
9390 /* All fields of a true enum will be structs. */
9393 else if (TYPE_NFIELDS (disr_type
) == 0)
9395 /* Could be data-less variant, so keep going. */
9396 disr_type
= nullptr;
9398 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9399 "RUST$ENUM$DISR") != 0)
9401 /* Not a Rust enum. */
9411 /* If we got here without a discriminant, then it's probably
9413 if (disr_type
== nullptr)
9416 /* Smash this type to be a structure type. We have to do this
9417 because the type has already been recorded. */
9418 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9420 /* Make space for the discriminant field. */
9421 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
9423 = (struct field
*) TYPE_ZALLOC (type
, (TYPE_NFIELDS (type
)
9424 * sizeof (struct field
)));
9425 memcpy (new_fields
+ 1, TYPE_FIELDS (type
),
9426 TYPE_NFIELDS (type
) * sizeof (struct field
));
9427 TYPE_FIELDS (type
) = new_fields
;
9428 TYPE_NFIELDS (type
) = TYPE_NFIELDS (type
) + 1;
9430 /* Install the discriminant at index 0 in the union. */
9431 TYPE_FIELD (type
, 0) = *disr_field
;
9432 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9433 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9435 /* We need a way to find the correct discriminant given a
9436 variant name. For convenience we build a map here. */
9437 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
9438 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9439 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
9441 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9444 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9445 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9449 int n_fields
= TYPE_NFIELDS (type
);
9450 /* We don't need a range entry for the discriminant, but we do
9451 need one for every other field, as there is no default
9453 discriminant_range
*ranges
= XOBNEWVEC (&objfile
->objfile_obstack
,
9456 /* Skip the discriminant here. */
9457 for (int i
= 1; i
< n_fields
; ++i
)
9459 /* Find the final word in the name of this variant's type.
9460 That name can be used to look up the correct
9462 const char *variant_name
9463 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (type
, i
)));
9465 auto iter
= discriminant_map
.find (variant_name
);
9466 if (iter
!= discriminant_map
.end ())
9468 ranges
[i
].low
= iter
->second
;
9469 ranges
[i
].high
= iter
->second
;
9472 /* Remove the discriminant field, if it exists. */
9473 struct type
*sub_type
= TYPE_FIELD_TYPE (type
, i
);
9474 if (TYPE_NFIELDS (sub_type
) > 0)
9476 --TYPE_NFIELDS (sub_type
);
9477 ++TYPE_FIELDS (sub_type
);
9479 TYPE_FIELD_NAME (type
, i
) = variant_name
;
9480 TYPE_NAME (sub_type
)
9481 = rust_fully_qualify (&objfile
->objfile_obstack
,
9482 TYPE_NAME (type
), variant_name
);
9485 /* Indicate that this is a variant type. */
9486 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1,
9487 gdb::array_view
<discriminant_range
> (ranges
,
9492 /* Rewrite some Rust unions to be structures with variants parts. */
9495 rust_union_quirks (struct dwarf2_cu
*cu
)
9497 gdb_assert (cu
->language
== language_rust
);
9498 for (type
*type_
: cu
->rust_unions
)
9499 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
9500 /* We don't need this any more. */
9501 cu
->rust_unions
.clear ();
9504 /* Return the symtab for PER_CU. This works properly regardless of
9505 whether we're using the index or psymtabs. */
9507 static struct compunit_symtab
*
9508 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
9510 return (per_cu
->dwarf2_per_objfile
->using_index
9511 ? per_cu
->v
.quick
->compunit_symtab
9512 : per_cu
->v
.psymtab
->compunit_symtab
);
9515 /* A helper function for computing the list of all symbol tables
9516 included by PER_CU. */
9519 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9520 htab_t all_children
, htab_t all_type_symtabs
,
9521 struct dwarf2_per_cu_data
*per_cu
,
9522 struct compunit_symtab
*immediate_parent
)
9525 struct compunit_symtab
*cust
;
9527 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9530 /* This inclusion and its children have been processed. */
9535 /* Only add a CU if it has a symbol table. */
9536 cust
= get_compunit_symtab (per_cu
);
9539 /* If this is a type unit only add its symbol table if we haven't
9540 seen it yet (type unit per_cu's can share symtabs). */
9541 if (per_cu
->is_debug_types
)
9543 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9547 result
->push_back (cust
);
9548 if (cust
->user
== NULL
)
9549 cust
->user
= immediate_parent
;
9554 result
->push_back (cust
);
9555 if (cust
->user
== NULL
)
9556 cust
->user
= immediate_parent
;
9560 if (!per_cu
->imported_symtabs_empty ())
9561 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9563 recursively_compute_inclusions (result
, all_children
,
9564 all_type_symtabs
, ptr
, cust
);
9568 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9572 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
9574 gdb_assert (! per_cu
->is_debug_types
);
9576 if (!per_cu
->imported_symtabs_empty ())
9579 std::vector
<compunit_symtab
*> result_symtabs
;
9580 htab_t all_children
, all_type_symtabs
;
9581 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
9583 /* If we don't have a symtab, we can just skip this case. */
9587 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9588 NULL
, xcalloc
, xfree
);
9589 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9590 NULL
, xcalloc
, xfree
);
9592 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9594 recursively_compute_inclusions (&result_symtabs
, all_children
,
9595 all_type_symtabs
, ptr
, cust
);
9598 /* Now we have a transitive closure of all the included symtabs. */
9599 len
= result_symtabs
.size ();
9601 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
9602 struct compunit_symtab
*, len
+ 1);
9603 memcpy (cust
->includes
, result_symtabs
.data (),
9604 len
* sizeof (compunit_symtab
*));
9605 cust
->includes
[len
] = NULL
;
9607 htab_delete (all_children
);
9608 htab_delete (all_type_symtabs
);
9612 /* Compute the 'includes' field for the symtabs of all the CUs we just
9616 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9618 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
9620 if (! iter
->is_debug_types
)
9621 compute_compunit_symtab_includes (iter
);
9624 dwarf2_per_objfile
->just_read_cus
.clear ();
9627 /* Generate full symbol information for PER_CU, whose DIEs have
9628 already been loaded into memory. */
9631 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9632 enum language pretend_language
)
9634 struct dwarf2_cu
*cu
= per_cu
->cu
;
9635 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9636 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9637 struct gdbarch
*gdbarch
= objfile
->arch ();
9638 CORE_ADDR lowpc
, highpc
;
9639 struct compunit_symtab
*cust
;
9641 struct block
*static_block
;
9644 baseaddr
= objfile
->text_section_offset ();
9646 /* Clear the list here in case something was left over. */
9647 cu
->method_list
.clear ();
9649 cu
->language
= pretend_language
;
9650 cu
->language_defn
= language_def (cu
->language
);
9652 /* Do line number decoding in read_file_scope () */
9653 process_die (cu
->dies
, cu
);
9655 /* For now fudge the Go package. */
9656 if (cu
->language
== language_go
)
9657 fixup_go_packaging (cu
);
9659 /* Now that we have processed all the DIEs in the CU, all the types
9660 should be complete, and it should now be safe to compute all of the
9662 compute_delayed_physnames (cu
);
9664 if (cu
->language
== language_rust
)
9665 rust_union_quirks (cu
);
9667 /* Some compilers don't define a DW_AT_high_pc attribute for the
9668 compilation unit. If the DW_AT_high_pc is missing, synthesize
9669 it, by scanning the DIE's below the compilation unit. */
9670 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
9672 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
9673 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
9675 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
9676 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
9677 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
9678 addrmap to help ensure it has an accurate map of pc values belonging to
9680 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
9682 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
9683 SECT_OFF_TEXT (objfile
),
9688 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
9690 /* Set symtab language to language from DW_AT_language. If the
9691 compilation is from a C file generated by language preprocessors, do
9692 not set the language if it was already deduced by start_subfile. */
9693 if (!(cu
->language
== language_c
9694 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
9695 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9697 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
9698 produce DW_AT_location with location lists but it can be possibly
9699 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
9700 there were bugs in prologue debug info, fixed later in GCC-4.5
9701 by "unwind info for epilogues" patch (which is not directly related).
9703 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
9704 needed, it would be wrong due to missing DW_AT_producer there.
9706 Still one can confuse GDB by using non-standard GCC compilation
9707 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
9709 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
9710 cust
->locations_valid
= 1;
9712 if (gcc_4_minor
>= 5)
9713 cust
->epilogue_unwind_valid
= 1;
9715 cust
->call_site_htab
= cu
->call_site_htab
;
9718 if (dwarf2_per_objfile
->using_index
)
9719 per_cu
->v
.quick
->compunit_symtab
= cust
;
9722 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9723 pst
->compunit_symtab
= cust
;
9727 /* Push it for inclusion processing later. */
9728 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
9730 /* Not needed any more. */
9731 cu
->reset_builder ();
9734 /* Generate full symbol information for type unit PER_CU, whose DIEs have
9735 already been loaded into memory. */
9738 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
9739 enum language pretend_language
)
9741 struct dwarf2_cu
*cu
= per_cu
->cu
;
9742 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9743 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9744 struct compunit_symtab
*cust
;
9745 struct signatured_type
*sig_type
;
9747 gdb_assert (per_cu
->is_debug_types
);
9748 sig_type
= (struct signatured_type
*) per_cu
;
9750 /* Clear the list here in case something was left over. */
9751 cu
->method_list
.clear ();
9753 cu
->language
= pretend_language
;
9754 cu
->language_defn
= language_def (cu
->language
);
9756 /* The symbol tables are set up in read_type_unit_scope. */
9757 process_die (cu
->dies
, cu
);
9759 /* For now fudge the Go package. */
9760 if (cu
->language
== language_go
)
9761 fixup_go_packaging (cu
);
9763 /* Now that we have processed all the DIEs in the CU, all the types
9764 should be complete, and it should now be safe to compute all of the
9766 compute_delayed_physnames (cu
);
9768 if (cu
->language
== language_rust
)
9769 rust_union_quirks (cu
);
9771 /* TUs share symbol tables.
9772 If this is the first TU to use this symtab, complete the construction
9773 of it with end_expandable_symtab. Otherwise, complete the addition of
9774 this TU's symbols to the existing symtab. */
9775 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
9777 buildsym_compunit
*builder
= cu
->get_builder ();
9778 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
9779 sig_type
->type_unit_group
->compunit_symtab
= cust
;
9783 /* Set symtab language to language from DW_AT_language. If the
9784 compilation is from a C file generated by language preprocessors,
9785 do not set the language if it was already deduced by
9787 if (!(cu
->language
== language_c
9788 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
9789 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9794 cu
->get_builder ()->augment_type_symtab ();
9795 cust
= sig_type
->type_unit_group
->compunit_symtab
;
9798 if (dwarf2_per_objfile
->using_index
)
9799 per_cu
->v
.quick
->compunit_symtab
= cust
;
9802 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9803 pst
->compunit_symtab
= cust
;
9807 /* Not needed any more. */
9808 cu
->reset_builder ();
9811 /* Process an imported unit DIE. */
9814 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9816 struct attribute
*attr
;
9818 /* For now we don't handle imported units in type units. */
9819 if (cu
->per_cu
->is_debug_types
)
9821 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9822 " supported in type units [in module %s]"),
9823 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
9826 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9829 sect_offset sect_off
= attr
->get_ref_die_offset ();
9830 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
9831 dwarf2_per_cu_data
*per_cu
9832 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
9833 cu
->per_cu
->dwarf2_per_objfile
);
9835 /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit
9836 into another compilation unit, at root level. Regard this as a hint,
9838 if (die
->parent
&& die
->parent
->parent
== NULL
9839 && per_cu
->unit_type
== DW_UT_compile
9840 && per_cu
->lang
== language_cplus
)
9843 /* If necessary, add it to the queue and load its DIEs. */
9844 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
9845 load_full_comp_unit (per_cu
, false, cu
->language
);
9847 cu
->per_cu
->imported_symtabs_push (per_cu
);
9851 /* RAII object that represents a process_die scope: i.e.,
9852 starts/finishes processing a DIE. */
9853 class process_die_scope
9856 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
9857 : m_die (die
), m_cu (cu
)
9859 /* We should only be processing DIEs not already in process. */
9860 gdb_assert (!m_die
->in_process
);
9861 m_die
->in_process
= true;
9864 ~process_die_scope ()
9866 m_die
->in_process
= false;
9868 /* If we're done processing the DIE for the CU that owns the line
9869 header, we don't need the line header anymore. */
9870 if (m_cu
->line_header_die_owner
== m_die
)
9872 delete m_cu
->line_header
;
9873 m_cu
->line_header
= NULL
;
9874 m_cu
->line_header_die_owner
= NULL
;
9883 /* Process a die and its children. */
9886 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9888 process_die_scope
scope (die
, cu
);
9892 case DW_TAG_padding
:
9894 case DW_TAG_compile_unit
:
9895 case DW_TAG_partial_unit
:
9896 read_file_scope (die
, cu
);
9898 case DW_TAG_type_unit
:
9899 read_type_unit_scope (die
, cu
);
9901 case DW_TAG_subprogram
:
9902 /* Nested subprograms in Fortran get a prefix. */
9903 if (cu
->language
== language_fortran
9904 && die
->parent
!= NULL
9905 && die
->parent
->tag
== DW_TAG_subprogram
)
9906 cu
->processing_has_namespace_info
= true;
9908 case DW_TAG_inlined_subroutine
:
9909 read_func_scope (die
, cu
);
9911 case DW_TAG_lexical_block
:
9912 case DW_TAG_try_block
:
9913 case DW_TAG_catch_block
:
9914 read_lexical_block_scope (die
, cu
);
9916 case DW_TAG_call_site
:
9917 case DW_TAG_GNU_call_site
:
9918 read_call_site_scope (die
, cu
);
9920 case DW_TAG_class_type
:
9921 case DW_TAG_interface_type
:
9922 case DW_TAG_structure_type
:
9923 case DW_TAG_union_type
:
9924 process_structure_scope (die
, cu
);
9926 case DW_TAG_enumeration_type
:
9927 process_enumeration_scope (die
, cu
);
9930 /* These dies have a type, but processing them does not create
9931 a symbol or recurse to process the children. Therefore we can
9932 read them on-demand through read_type_die. */
9933 case DW_TAG_subroutine_type
:
9934 case DW_TAG_set_type
:
9935 case DW_TAG_array_type
:
9936 case DW_TAG_pointer_type
:
9937 case DW_TAG_ptr_to_member_type
:
9938 case DW_TAG_reference_type
:
9939 case DW_TAG_rvalue_reference_type
:
9940 case DW_TAG_string_type
:
9943 case DW_TAG_base_type
:
9944 case DW_TAG_subrange_type
:
9945 case DW_TAG_typedef
:
9946 /* Add a typedef symbol for the type definition, if it has a
9948 new_symbol (die
, read_type_die (die
, cu
), cu
);
9950 case DW_TAG_common_block
:
9951 read_common_block (die
, cu
);
9953 case DW_TAG_common_inclusion
:
9955 case DW_TAG_namespace
:
9956 cu
->processing_has_namespace_info
= true;
9957 read_namespace (die
, cu
);
9960 cu
->processing_has_namespace_info
= true;
9961 read_module (die
, cu
);
9963 case DW_TAG_imported_declaration
:
9964 cu
->processing_has_namespace_info
= true;
9965 if (read_namespace_alias (die
, cu
))
9967 /* The declaration is not a global namespace alias. */
9969 case DW_TAG_imported_module
:
9970 cu
->processing_has_namespace_info
= true;
9971 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
9972 || cu
->language
!= language_fortran
))
9973 complaint (_("Tag '%s' has unexpected children"),
9974 dwarf_tag_name (die
->tag
));
9975 read_import_statement (die
, cu
);
9978 case DW_TAG_imported_unit
:
9979 process_imported_unit_die (die
, cu
);
9982 case DW_TAG_variable
:
9983 read_variable (die
, cu
);
9987 new_symbol (die
, NULL
, cu
);
9992 /* DWARF name computation. */
9994 /* A helper function for dwarf2_compute_name which determines whether DIE
9995 needs to have the name of the scope prepended to the name listed in the
9999 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10001 struct attribute
*attr
;
10005 case DW_TAG_namespace
:
10006 case DW_TAG_typedef
:
10007 case DW_TAG_class_type
:
10008 case DW_TAG_interface_type
:
10009 case DW_TAG_structure_type
:
10010 case DW_TAG_union_type
:
10011 case DW_TAG_enumeration_type
:
10012 case DW_TAG_enumerator
:
10013 case DW_TAG_subprogram
:
10014 case DW_TAG_inlined_subroutine
:
10015 case DW_TAG_member
:
10016 case DW_TAG_imported_declaration
:
10019 case DW_TAG_variable
:
10020 case DW_TAG_constant
:
10021 /* We only need to prefix "globally" visible variables. These include
10022 any variable marked with DW_AT_external or any variable that
10023 lives in a namespace. [Variables in anonymous namespaces
10024 require prefixing, but they are not DW_AT_external.] */
10026 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10028 struct dwarf2_cu
*spec_cu
= cu
;
10030 return die_needs_namespace (die_specification (die
, &spec_cu
),
10034 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10035 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10036 && die
->parent
->tag
!= DW_TAG_module
)
10038 /* A variable in a lexical block of some kind does not need a
10039 namespace, even though in C++ such variables may be external
10040 and have a mangled name. */
10041 if (die
->parent
->tag
== DW_TAG_lexical_block
10042 || die
->parent
->tag
== DW_TAG_try_block
10043 || die
->parent
->tag
== DW_TAG_catch_block
10044 || die
->parent
->tag
== DW_TAG_subprogram
)
10053 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10054 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10055 defined for the given DIE. */
10057 static struct attribute
*
10058 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10060 struct attribute
*attr
;
10062 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10064 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10069 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10070 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10071 defined for the given DIE. */
10073 static const char *
10074 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10076 const char *linkage_name
;
10078 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10079 if (linkage_name
== NULL
)
10080 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10082 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10083 See https://github.com/rust-lang/rust/issues/32925. */
10084 if (cu
->language
== language_rust
&& linkage_name
!= NULL
10085 && strchr (linkage_name
, '{') != NULL
)
10086 linkage_name
= NULL
;
10088 return linkage_name
;
10091 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10092 compute the physname for the object, which include a method's:
10093 - formal parameters (C++),
10094 - receiver type (Go),
10096 The term "physname" is a bit confusing.
10097 For C++, for example, it is the demangled name.
10098 For Go, for example, it's the mangled name.
10100 For Ada, return the DIE's linkage name rather than the fully qualified
10101 name. PHYSNAME is ignored..
10103 The result is allocated on the objfile_obstack and canonicalized. */
10105 static const char *
10106 dwarf2_compute_name (const char *name
,
10107 struct die_info
*die
, struct dwarf2_cu
*cu
,
10110 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10113 name
= dwarf2_name (die
, cu
);
10115 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10116 but otherwise compute it by typename_concat inside GDB.
10117 FIXME: Actually this is not really true, or at least not always true.
10118 It's all very confusing. compute_and_set_names doesn't try to demangle
10119 Fortran names because there is no mangling standard. So new_symbol
10120 will set the demangled name to the result of dwarf2_full_name, and it is
10121 the demangled name that GDB uses if it exists. */
10122 if (cu
->language
== language_ada
10123 || (cu
->language
== language_fortran
&& physname
))
10125 /* For Ada unit, we prefer the linkage name over the name, as
10126 the former contains the exported name, which the user expects
10127 to be able to reference. Ideally, we want the user to be able
10128 to reference this entity using either natural or linkage name,
10129 but we haven't started looking at this enhancement yet. */
10130 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10132 if (linkage_name
!= NULL
)
10133 return linkage_name
;
10136 /* These are the only languages we know how to qualify names in. */
10138 && (cu
->language
== language_cplus
10139 || cu
->language
== language_fortran
|| cu
->language
== language_d
10140 || cu
->language
== language_rust
))
10142 if (die_needs_namespace (die
, cu
))
10144 const char *prefix
;
10145 const char *canonical_name
= NULL
;
10149 prefix
= determine_prefix (die
, cu
);
10150 if (*prefix
!= '\0')
10152 gdb::unique_xmalloc_ptr
<char> prefixed_name
10153 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10155 buf
.puts (prefixed_name
.get ());
10160 /* Template parameters may be specified in the DIE's DW_AT_name, or
10161 as children with DW_TAG_template_type_param or
10162 DW_TAG_value_type_param. If the latter, add them to the name
10163 here. If the name already has template parameters, then
10164 skip this step; some versions of GCC emit both, and
10165 it is more efficient to use the pre-computed name.
10167 Something to keep in mind about this process: it is very
10168 unlikely, or in some cases downright impossible, to produce
10169 something that will match the mangled name of a function.
10170 If the definition of the function has the same debug info,
10171 we should be able to match up with it anyway. But fallbacks
10172 using the minimal symbol, for instance to find a method
10173 implemented in a stripped copy of libstdc++, will not work.
10174 If we do not have debug info for the definition, we will have to
10175 match them up some other way.
10177 When we do name matching there is a related problem with function
10178 templates; two instantiated function templates are allowed to
10179 differ only by their return types, which we do not add here. */
10181 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10183 struct attribute
*attr
;
10184 struct die_info
*child
;
10187 die
->building_fullname
= 1;
10189 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10193 const gdb_byte
*bytes
;
10194 struct dwarf2_locexpr_baton
*baton
;
10197 if (child
->tag
!= DW_TAG_template_type_param
10198 && child
->tag
!= DW_TAG_template_value_param
)
10209 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10212 complaint (_("template parameter missing DW_AT_type"));
10213 buf
.puts ("UNKNOWN_TYPE");
10216 type
= die_type (child
, cu
);
10218 if (child
->tag
== DW_TAG_template_type_param
)
10220 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10221 &type_print_raw_options
);
10225 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10228 complaint (_("template parameter missing "
10229 "DW_AT_const_value"));
10230 buf
.puts ("UNKNOWN_VALUE");
10234 dwarf2_const_value_attr (attr
, type
, name
,
10235 &cu
->comp_unit_obstack
, cu
,
10236 &value
, &bytes
, &baton
);
10238 if (TYPE_NOSIGN (type
))
10239 /* GDB prints characters as NUMBER 'CHAR'. If that's
10240 changed, this can use value_print instead. */
10241 c_printchar (value
, type
, &buf
);
10244 struct value_print_options opts
;
10247 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10251 else if (bytes
!= NULL
)
10253 v
= allocate_value (type
);
10254 memcpy (value_contents_writeable (v
), bytes
,
10255 TYPE_LENGTH (type
));
10258 v
= value_from_longest (type
, value
);
10260 /* Specify decimal so that we do not depend on
10262 get_formatted_print_options (&opts
, 'd');
10264 value_print (v
, &buf
, &opts
);
10269 die
->building_fullname
= 0;
10273 /* Close the argument list, with a space if necessary
10274 (nested templates). */
10275 if (!buf
.empty () && buf
.string ().back () == '>')
10282 /* For C++ methods, append formal parameter type
10283 information, if PHYSNAME. */
10285 if (physname
&& die
->tag
== DW_TAG_subprogram
10286 && cu
->language
== language_cplus
)
10288 struct type
*type
= read_type_die (die
, cu
);
10290 c_type_print_args (type
, &buf
, 1, cu
->language
,
10291 &type_print_raw_options
);
10293 if (cu
->language
== language_cplus
)
10295 /* Assume that an artificial first parameter is
10296 "this", but do not crash if it is not. RealView
10297 marks unnamed (and thus unused) parameters as
10298 artificial; there is no way to differentiate
10300 if (TYPE_NFIELDS (type
) > 0
10301 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10302 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10303 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10305 buf
.puts (" const");
10309 const std::string
&intermediate_name
= buf
.string ();
10311 if (cu
->language
== language_cplus
)
10313 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10316 /* If we only computed INTERMEDIATE_NAME, or if
10317 INTERMEDIATE_NAME is already canonical, then we need to
10319 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10320 name
= objfile
->intern (intermediate_name
);
10322 name
= canonical_name
;
10329 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10330 If scope qualifiers are appropriate they will be added. The result
10331 will be allocated on the storage_obstack, or NULL if the DIE does
10332 not have a name. NAME may either be from a previous call to
10333 dwarf2_name or NULL.
10335 The output string will be canonicalized (if C++). */
10337 static const char *
10338 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10340 return dwarf2_compute_name (name
, die
, cu
, 0);
10343 /* Construct a physname for the given DIE in CU. NAME may either be
10344 from a previous call to dwarf2_name or NULL. The result will be
10345 allocated on the objfile_objstack or NULL if the DIE does not have a
10348 The output string will be canonicalized (if C++). */
10350 static const char *
10351 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10353 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10354 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10357 /* In this case dwarf2_compute_name is just a shortcut not building anything
10359 if (!die_needs_namespace (die
, cu
))
10360 return dwarf2_compute_name (name
, die
, cu
, 1);
10362 if (cu
->language
!= language_rust
)
10363 mangled
= dw2_linkage_name (die
, cu
);
10365 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10367 gdb::unique_xmalloc_ptr
<char> demangled
;
10368 if (mangled
!= NULL
)
10371 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10373 /* Do nothing (do not demangle the symbol name). */
10375 else if (cu
->language
== language_go
)
10377 /* This is a lie, but we already lie to the caller new_symbol.
10378 new_symbol assumes we return the mangled name.
10379 This just undoes that lie until things are cleaned up. */
10383 /* Use DMGL_RET_DROP for C++ template functions to suppress
10384 their return type. It is easier for GDB users to search
10385 for such functions as `name(params)' than `long name(params)'.
10386 In such case the minimal symbol names do not match the full
10387 symbol names but for template functions there is never a need
10388 to look up their definition from their declaration so
10389 the only disadvantage remains the minimal symbol variant
10390 `long name(params)' does not have the proper inferior type. */
10391 demangled
.reset (gdb_demangle (mangled
,
10392 (DMGL_PARAMS
| DMGL_ANSI
10393 | DMGL_RET_DROP
)));
10396 canon
= demangled
.get ();
10404 if (canon
== NULL
|| check_physname
)
10406 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10408 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10410 /* It may not mean a bug in GDB. The compiler could also
10411 compute DW_AT_linkage_name incorrectly. But in such case
10412 GDB would need to be bug-to-bug compatible. */
10414 complaint (_("Computed physname <%s> does not match demangled <%s> "
10415 "(from linkage <%s>) - DIE at %s [in module %s]"),
10416 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10417 objfile_name (objfile
));
10419 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10420 is available here - over computed PHYSNAME. It is safer
10421 against both buggy GDB and buggy compilers. */
10435 retval
= objfile
->intern (retval
);
10440 /* Inspect DIE in CU for a namespace alias. If one exists, record
10441 a new symbol for it.
10443 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10446 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10448 struct attribute
*attr
;
10450 /* If the die does not have a name, this is not a namespace
10452 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10456 struct die_info
*d
= die
;
10457 struct dwarf2_cu
*imported_cu
= cu
;
10459 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10460 keep inspecting DIEs until we hit the underlying import. */
10461 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10462 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10464 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10468 d
= follow_die_ref (d
, attr
, &imported_cu
);
10469 if (d
->tag
!= DW_TAG_imported_declaration
)
10473 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10475 complaint (_("DIE at %s has too many recursively imported "
10476 "declarations"), sect_offset_str (d
->sect_off
));
10483 sect_offset sect_off
= attr
->get_ref_die_offset ();
10485 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
10486 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
10488 /* This declaration is a global namespace alias. Add
10489 a symbol for it whose type is the aliased namespace. */
10490 new_symbol (die
, type
, cu
);
10499 /* Return the using directives repository (global or local?) to use in the
10500 current context for CU.
10502 For Ada, imported declarations can materialize renamings, which *may* be
10503 global. However it is impossible (for now?) in DWARF to distinguish
10504 "external" imported declarations and "static" ones. As all imported
10505 declarations seem to be static in all other languages, make them all CU-wide
10506 global only in Ada. */
10508 static struct using_direct
**
10509 using_directives (struct dwarf2_cu
*cu
)
10511 if (cu
->language
== language_ada
10512 && cu
->get_builder ()->outermost_context_p ())
10513 return cu
->get_builder ()->get_global_using_directives ();
10515 return cu
->get_builder ()->get_local_using_directives ();
10518 /* Read the import statement specified by the given die and record it. */
10521 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10523 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10524 struct attribute
*import_attr
;
10525 struct die_info
*imported_die
, *child_die
;
10526 struct dwarf2_cu
*imported_cu
;
10527 const char *imported_name
;
10528 const char *imported_name_prefix
;
10529 const char *canonical_name
;
10530 const char *import_alias
;
10531 const char *imported_declaration
= NULL
;
10532 const char *import_prefix
;
10533 std::vector
<const char *> excludes
;
10535 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10536 if (import_attr
== NULL
)
10538 complaint (_("Tag '%s' has no DW_AT_import"),
10539 dwarf_tag_name (die
->tag
));
10544 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10545 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10546 if (imported_name
== NULL
)
10548 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10550 The import in the following code:
10564 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10565 <52> DW_AT_decl_file : 1
10566 <53> DW_AT_decl_line : 6
10567 <54> DW_AT_import : <0x75>
10568 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10569 <59> DW_AT_name : B
10570 <5b> DW_AT_decl_file : 1
10571 <5c> DW_AT_decl_line : 2
10572 <5d> DW_AT_type : <0x6e>
10574 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10575 <76> DW_AT_byte_size : 4
10576 <77> DW_AT_encoding : 5 (signed)
10578 imports the wrong die ( 0x75 instead of 0x58 ).
10579 This case will be ignored until the gcc bug is fixed. */
10583 /* Figure out the local name after import. */
10584 import_alias
= dwarf2_name (die
, cu
);
10586 /* Figure out where the statement is being imported to. */
10587 import_prefix
= determine_prefix (die
, cu
);
10589 /* Figure out what the scope of the imported die is and prepend it
10590 to the name of the imported die. */
10591 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10593 if (imported_die
->tag
!= DW_TAG_namespace
10594 && imported_die
->tag
!= DW_TAG_module
)
10596 imported_declaration
= imported_name
;
10597 canonical_name
= imported_name_prefix
;
10599 else if (strlen (imported_name_prefix
) > 0)
10600 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10601 imported_name_prefix
,
10602 (cu
->language
== language_d
? "." : "::"),
10603 imported_name
, (char *) NULL
);
10605 canonical_name
= imported_name
;
10607 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10608 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10609 child_die
= child_die
->sibling
)
10611 /* DWARF-4: A Fortran use statement with a “rename list” may be
10612 represented by an imported module entry with an import attribute
10613 referring to the module and owned entries corresponding to those
10614 entities that are renamed as part of being imported. */
10616 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10618 complaint (_("child DW_TAG_imported_declaration expected "
10619 "- DIE at %s [in module %s]"),
10620 sect_offset_str (child_die
->sect_off
),
10621 objfile_name (objfile
));
10625 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10626 if (import_attr
== NULL
)
10628 complaint (_("Tag '%s' has no DW_AT_import"),
10629 dwarf_tag_name (child_die
->tag
));
10634 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10636 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10637 if (imported_name
== NULL
)
10639 complaint (_("child DW_TAG_imported_declaration has unknown "
10640 "imported name - DIE at %s [in module %s]"),
10641 sect_offset_str (child_die
->sect_off
),
10642 objfile_name (objfile
));
10646 excludes
.push_back (imported_name
);
10648 process_die (child_die
, cu
);
10651 add_using_directive (using_directives (cu
),
10655 imported_declaration
,
10658 &objfile
->objfile_obstack
);
10661 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10662 types, but gives them a size of zero. Starting with version 14,
10663 ICC is compatible with GCC. */
10666 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10668 if (!cu
->checked_producer
)
10669 check_producer (cu
);
10671 return cu
->producer_is_icc_lt_14
;
10674 /* ICC generates a DW_AT_type for C void functions. This was observed on
10675 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
10676 which says that void functions should not have a DW_AT_type. */
10679 producer_is_icc (struct dwarf2_cu
*cu
)
10681 if (!cu
->checked_producer
)
10682 check_producer (cu
);
10684 return cu
->producer_is_icc
;
10687 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
10688 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
10689 this, it was first present in GCC release 4.3.0. */
10692 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
10694 if (!cu
->checked_producer
)
10695 check_producer (cu
);
10697 return cu
->producer_is_gcc_lt_4_3
;
10700 static file_and_directory
10701 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
10703 file_and_directory res
;
10705 /* Find the filename. Do not use dwarf2_name here, since the filename
10706 is not a source language identifier. */
10707 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
10708 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
10710 if (res
.comp_dir
== NULL
10711 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
10712 && IS_ABSOLUTE_PATH (res
.name
))
10714 res
.comp_dir_storage
= ldirname (res
.name
);
10715 if (!res
.comp_dir_storage
.empty ())
10716 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
10718 if (res
.comp_dir
!= NULL
)
10720 /* Irix 6.2 native cc prepends <machine>.: to the compilation
10721 directory, get rid of it. */
10722 const char *cp
= strchr (res
.comp_dir
, ':');
10724 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
10725 res
.comp_dir
= cp
+ 1;
10728 if (res
.name
== NULL
)
10729 res
.name
= "<unknown>";
10734 /* Handle DW_AT_stmt_list for a compilation unit.
10735 DIE is the DW_TAG_compile_unit die for CU.
10736 COMP_DIR is the compilation directory. LOWPC is passed to
10737 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
10740 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
10741 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
10743 struct dwarf2_per_objfile
*dwarf2_per_objfile
10744 = cu
->per_cu
->dwarf2_per_objfile
;
10745 struct attribute
*attr
;
10746 struct line_header line_header_local
;
10747 hashval_t line_header_local_hash
;
10749 int decode_mapping
;
10751 gdb_assert (! cu
->per_cu
->is_debug_types
);
10753 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10757 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10759 /* The line header hash table is only created if needed (it exists to
10760 prevent redundant reading of the line table for partial_units).
10761 If we're given a partial_unit, we'll need it. If we're given a
10762 compile_unit, then use the line header hash table if it's already
10763 created, but don't create one just yet. */
10765 if (dwarf2_per_objfile
->line_header_hash
== NULL
10766 && die
->tag
== DW_TAG_partial_unit
)
10768 dwarf2_per_objfile
->line_header_hash
10769 .reset (htab_create_alloc (127, line_header_hash_voidp
,
10770 line_header_eq_voidp
,
10771 free_line_header_voidp
,
10775 line_header_local
.sect_off
= line_offset
;
10776 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
10777 line_header_local_hash
= line_header_hash (&line_header_local
);
10778 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
10780 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
.get (),
10781 &line_header_local
,
10782 line_header_local_hash
, NO_INSERT
);
10784 /* For DW_TAG_compile_unit we need info like symtab::linetable which
10785 is not present in *SLOT (since if there is something in *SLOT then
10786 it will be for a partial_unit). */
10787 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
10789 gdb_assert (*slot
!= NULL
);
10790 cu
->line_header
= (struct line_header
*) *slot
;
10795 /* dwarf_decode_line_header does not yet provide sufficient information.
10796 We always have to call also dwarf_decode_lines for it. */
10797 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
10801 cu
->line_header
= lh
.release ();
10802 cu
->line_header_die_owner
= die
;
10804 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
10808 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
.get (),
10809 &line_header_local
,
10810 line_header_local_hash
, INSERT
);
10811 gdb_assert (slot
!= NULL
);
10813 if (slot
!= NULL
&& *slot
== NULL
)
10815 /* This newly decoded line number information unit will be owned
10816 by line_header_hash hash table. */
10817 *slot
= cu
->line_header
;
10818 cu
->line_header_die_owner
= NULL
;
10822 /* We cannot free any current entry in (*slot) as that struct line_header
10823 may be already used by multiple CUs. Create only temporary decoded
10824 line_header for this CU - it may happen at most once for each line
10825 number information unit. And if we're not using line_header_hash
10826 then this is what we want as well. */
10827 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
10829 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
10830 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
10835 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
10838 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10840 struct dwarf2_per_objfile
*dwarf2_per_objfile
10841 = cu
->per_cu
->dwarf2_per_objfile
;
10842 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10843 struct gdbarch
*gdbarch
= objfile
->arch ();
10844 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
10845 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
10846 struct attribute
*attr
;
10847 struct die_info
*child_die
;
10848 CORE_ADDR baseaddr
;
10850 prepare_one_comp_unit (cu
, die
, cu
->language
);
10851 baseaddr
= objfile
->text_section_offset ();
10853 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
10855 /* If we didn't find a lowpc, set it to highpc to avoid complaints
10856 from finish_block. */
10857 if (lowpc
== ((CORE_ADDR
) -1))
10859 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
10861 file_and_directory fnd
= find_file_and_directory (die
, cu
);
10863 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
10864 standardised yet. As a workaround for the language detection we fall
10865 back to the DW_AT_producer string. */
10866 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
10867 cu
->language
= language_opencl
;
10869 /* Similar hack for Go. */
10870 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
10871 set_cu_language (DW_LANG_Go
, cu
);
10873 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
10875 /* Decode line number information if present. We do this before
10876 processing child DIEs, so that the line header table is available
10877 for DW_AT_decl_file. */
10878 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
10880 /* Process all dies in compilation unit. */
10881 if (die
->child
!= NULL
)
10883 child_die
= die
->child
;
10884 while (child_die
&& child_die
->tag
)
10886 process_die (child_die
, cu
);
10887 child_die
= child_die
->sibling
;
10891 /* Decode macro information, if present. Dwarf 2 macro information
10892 refers to information in the line number info statement program
10893 header, so we can only read it if we've read the header
10895 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
10897 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
10898 if (attr
&& cu
->line_header
)
10900 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
10901 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
10903 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
10907 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
10908 if (attr
&& cu
->line_header
)
10910 unsigned int macro_offset
= DW_UNSND (attr
);
10912 dwarf_decode_macros (cu
, macro_offset
, 0);
10918 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
10920 struct type_unit_group
*tu_group
;
10922 struct attribute
*attr
;
10924 struct signatured_type
*sig_type
;
10926 gdb_assert (per_cu
->is_debug_types
);
10927 sig_type
= (struct signatured_type
*) per_cu
;
10929 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
10931 /* If we're using .gdb_index (includes -readnow) then
10932 per_cu->type_unit_group may not have been set up yet. */
10933 if (sig_type
->type_unit_group
== NULL
)
10934 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
10935 tu_group
= sig_type
->type_unit_group
;
10937 /* If we've already processed this stmt_list there's no real need to
10938 do it again, we could fake it and just recreate the part we need
10939 (file name,index -> symtab mapping). If data shows this optimization
10940 is useful we can do it then. */
10941 first_time
= tu_group
->compunit_symtab
== NULL
;
10943 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
10948 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10949 lh
= dwarf_decode_line_header (line_offset
, this);
10954 start_symtab ("", NULL
, 0);
10957 gdb_assert (tu_group
->symtabs
== NULL
);
10958 gdb_assert (m_builder
== nullptr);
10959 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
10960 m_builder
.reset (new struct buildsym_compunit
10961 (COMPUNIT_OBJFILE (cust
), "",
10962 COMPUNIT_DIRNAME (cust
),
10963 compunit_language (cust
),
10965 list_in_scope
= get_builder ()->get_file_symbols ();
10970 line_header
= lh
.release ();
10971 line_header_die_owner
= die
;
10975 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
10977 /* Note: We don't assign tu_group->compunit_symtab yet because we're
10978 still initializing it, and our caller (a few levels up)
10979 process_full_type_unit still needs to know if this is the first
10983 = XOBNEWVEC (&COMPUNIT_OBJFILE (cust
)->objfile_obstack
,
10984 struct symtab
*, line_header
->file_names_size ());
10986 auto &file_names
= line_header
->file_names ();
10987 for (i
= 0; i
< file_names
.size (); ++i
)
10989 file_entry
&fe
= file_names
[i
];
10990 dwarf2_start_subfile (this, fe
.name
,
10991 fe
.include_dir (line_header
));
10992 buildsym_compunit
*b
= get_builder ();
10993 if (b
->get_current_subfile ()->symtab
== NULL
)
10995 /* NOTE: start_subfile will recognize when it's been
10996 passed a file it has already seen. So we can't
10997 assume there's a simple mapping from
10998 cu->line_header->file_names to subfiles, plus
10999 cu->line_header->file_names may contain dups. */
11000 b
->get_current_subfile ()->symtab
11001 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11004 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11005 tu_group
->symtabs
[i
] = fe
.symtab
;
11010 gdb_assert (m_builder
== nullptr);
11011 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11012 m_builder
.reset (new struct buildsym_compunit
11013 (COMPUNIT_OBJFILE (cust
), "",
11014 COMPUNIT_DIRNAME (cust
),
11015 compunit_language (cust
),
11017 list_in_scope
= get_builder ()->get_file_symbols ();
11019 auto &file_names
= line_header
->file_names ();
11020 for (i
= 0; i
< file_names
.size (); ++i
)
11022 file_entry
&fe
= file_names
[i
];
11023 fe
.symtab
= tu_group
->symtabs
[i
];
11027 /* The main symtab is allocated last. Type units don't have DW_AT_name
11028 so they don't have a "real" (so to speak) symtab anyway.
11029 There is later code that will assign the main symtab to all symbols
11030 that don't have one. We need to handle the case of a symbol with a
11031 missing symtab (DW_AT_decl_file) anyway. */
11034 /* Process DW_TAG_type_unit.
11035 For TUs we want to skip the first top level sibling if it's not the
11036 actual type being defined by this TU. In this case the first top
11037 level sibling is there to provide context only. */
11040 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11042 struct die_info
*child_die
;
11044 prepare_one_comp_unit (cu
, die
, language_minimal
);
11046 /* Initialize (or reinitialize) the machinery for building symtabs.
11047 We do this before processing child DIEs, so that the line header table
11048 is available for DW_AT_decl_file. */
11049 cu
->setup_type_unit_groups (die
);
11051 if (die
->child
!= NULL
)
11053 child_die
= die
->child
;
11054 while (child_die
&& child_die
->tag
)
11056 process_die (child_die
, cu
);
11057 child_die
= child_die
->sibling
;
11064 http://gcc.gnu.org/wiki/DebugFission
11065 http://gcc.gnu.org/wiki/DebugFissionDWP
11067 To simplify handling of both DWO files ("object" files with the DWARF info)
11068 and DWP files (a file with the DWOs packaged up into one file), we treat
11069 DWP files as having a collection of virtual DWO files. */
11072 hash_dwo_file (const void *item
)
11074 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11077 hash
= htab_hash_string (dwo_file
->dwo_name
);
11078 if (dwo_file
->comp_dir
!= NULL
)
11079 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11084 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11086 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11087 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11089 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11091 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11092 return lhs
->comp_dir
== rhs
->comp_dir
;
11093 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11096 /* Allocate a hash table for DWO files. */
11099 allocate_dwo_file_hash_table ()
11101 auto delete_dwo_file
= [] (void *item
)
11103 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11108 return htab_up (htab_create_alloc (41,
11115 /* Lookup DWO file DWO_NAME. */
11118 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11119 const char *dwo_name
,
11120 const char *comp_dir
)
11122 struct dwo_file find_entry
;
11125 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11126 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
11128 find_entry
.dwo_name
= dwo_name
;
11129 find_entry
.comp_dir
= comp_dir
;
11130 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
.get (), &find_entry
,
11137 hash_dwo_unit (const void *item
)
11139 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11141 /* This drops the top 32 bits of the id, but is ok for a hash. */
11142 return dwo_unit
->signature
;
11146 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11148 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11149 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11151 /* The signature is assumed to be unique within the DWO file.
11152 So while object file CU dwo_id's always have the value zero,
11153 that's OK, assuming each object file DWO file has only one CU,
11154 and that's the rule for now. */
11155 return lhs
->signature
== rhs
->signature
;
11158 /* Allocate a hash table for DWO CUs,TUs.
11159 There is one of these tables for each of CUs,TUs for each DWO file. */
11162 allocate_dwo_unit_table ()
11164 /* Start out with a pretty small number.
11165 Generally DWO files contain only one CU and maybe some TUs. */
11166 return htab_up (htab_create_alloc (3,
11169 NULL
, xcalloc
, xfree
));
11172 /* die_reader_func for create_dwo_cu. */
11175 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11176 const gdb_byte
*info_ptr
,
11177 struct die_info
*comp_unit_die
,
11178 struct dwo_file
*dwo_file
,
11179 struct dwo_unit
*dwo_unit
)
11181 struct dwarf2_cu
*cu
= reader
->cu
;
11182 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11183 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11185 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11186 if (!signature
.has_value ())
11188 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11189 " its dwo_id [in module %s]"),
11190 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11194 dwo_unit
->dwo_file
= dwo_file
;
11195 dwo_unit
->signature
= *signature
;
11196 dwo_unit
->section
= section
;
11197 dwo_unit
->sect_off
= sect_off
;
11198 dwo_unit
->length
= cu
->per_cu
->length
;
11200 if (dwarf_read_debug
)
11201 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11202 sect_offset_str (sect_off
),
11203 hex_string (dwo_unit
->signature
));
11206 /* Create the dwo_units for the CUs in a DWO_FILE.
11207 Note: This function processes DWO files only, not DWP files. */
11210 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11211 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11212 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11214 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11215 const gdb_byte
*info_ptr
, *end_ptr
;
11217 section
.read (objfile
);
11218 info_ptr
= section
.buffer
;
11220 if (info_ptr
== NULL
)
11223 if (dwarf_read_debug
)
11225 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11226 section
.get_name (),
11227 section
.get_file_name ());
11230 end_ptr
= info_ptr
+ section
.size
;
11231 while (info_ptr
< end_ptr
)
11233 struct dwarf2_per_cu_data per_cu
;
11234 struct dwo_unit read_unit
{};
11235 struct dwo_unit
*dwo_unit
;
11237 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11239 memset (&per_cu
, 0, sizeof (per_cu
));
11240 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11241 per_cu
.is_debug_types
= 0;
11242 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11243 per_cu
.section
= §ion
;
11245 cutu_reader
reader (&per_cu
, cu
, &dwo_file
);
11246 if (!reader
.dummy_p
)
11247 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11248 &dwo_file
, &read_unit
);
11249 info_ptr
+= per_cu
.length
;
11251 // If the unit could not be parsed, skip it.
11252 if (read_unit
.dwo_file
== NULL
)
11255 if (cus_htab
== NULL
)
11256 cus_htab
= allocate_dwo_unit_table ();
11258 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11259 *dwo_unit
= read_unit
;
11260 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11261 gdb_assert (slot
!= NULL
);
11264 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11265 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11267 complaint (_("debug cu entry at offset %s is duplicate to"
11268 " the entry at offset %s, signature %s"),
11269 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11270 hex_string (dwo_unit
->signature
));
11272 *slot
= (void *)dwo_unit
;
11276 /* DWP file .debug_{cu,tu}_index section format:
11277 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11281 Both index sections have the same format, and serve to map a 64-bit
11282 signature to a set of section numbers. Each section begins with a header,
11283 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11284 indexes, and a pool of 32-bit section numbers. The index sections will be
11285 aligned at 8-byte boundaries in the file.
11287 The index section header consists of:
11289 V, 32 bit version number
11291 N, 32 bit number of compilation units or type units in the index
11292 M, 32 bit number of slots in the hash table
11294 Numbers are recorded using the byte order of the application binary.
11296 The hash table begins at offset 16 in the section, and consists of an array
11297 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11298 order of the application binary). Unused slots in the hash table are 0.
11299 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11301 The parallel table begins immediately after the hash table
11302 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11303 array of 32-bit indexes (using the byte order of the application binary),
11304 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11305 table contains a 32-bit index into the pool of section numbers. For unused
11306 hash table slots, the corresponding entry in the parallel table will be 0.
11308 The pool of section numbers begins immediately following the hash table
11309 (at offset 16 + 12 * M from the beginning of the section). The pool of
11310 section numbers consists of an array of 32-bit words (using the byte order
11311 of the application binary). Each item in the array is indexed starting
11312 from 0. The hash table entry provides the index of the first section
11313 number in the set. Additional section numbers in the set follow, and the
11314 set is terminated by a 0 entry (section number 0 is not used in ELF).
11316 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11317 section must be the first entry in the set, and the .debug_abbrev.dwo must
11318 be the second entry. Other members of the set may follow in any order.
11324 DWP Version 2 combines all the .debug_info, etc. sections into one,
11325 and the entries in the index tables are now offsets into these sections.
11326 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11329 Index Section Contents:
11331 Hash Table of Signatures dwp_hash_table.hash_table
11332 Parallel Table of Indices dwp_hash_table.unit_table
11333 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11334 Table of Section Sizes dwp_hash_table.v2.sizes
11336 The index section header consists of:
11338 V, 32 bit version number
11339 L, 32 bit number of columns in the table of section offsets
11340 N, 32 bit number of compilation units or type units in the index
11341 M, 32 bit number of slots in the hash table
11343 Numbers are recorded using the byte order of the application binary.
11345 The hash table has the same format as version 1.
11346 The parallel table of indices has the same format as version 1,
11347 except that the entries are origin-1 indices into the table of sections
11348 offsets and the table of section sizes.
11350 The table of offsets begins immediately following the parallel table
11351 (at offset 16 + 12 * M from the beginning of the section). The table is
11352 a two-dimensional array of 32-bit words (using the byte order of the
11353 application binary), with L columns and N+1 rows, in row-major order.
11354 Each row in the array is indexed starting from 0. The first row provides
11355 a key to the remaining rows: each column in this row provides an identifier
11356 for a debug section, and the offsets in the same column of subsequent rows
11357 refer to that section. The section identifiers are:
11359 DW_SECT_INFO 1 .debug_info.dwo
11360 DW_SECT_TYPES 2 .debug_types.dwo
11361 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11362 DW_SECT_LINE 4 .debug_line.dwo
11363 DW_SECT_LOC 5 .debug_loc.dwo
11364 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11365 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11366 DW_SECT_MACRO 8 .debug_macro.dwo
11368 The offsets provided by the CU and TU index sections are the base offsets
11369 for the contributions made by each CU or TU to the corresponding section
11370 in the package file. Each CU and TU header contains an abbrev_offset
11371 field, used to find the abbreviations table for that CU or TU within the
11372 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11373 be interpreted as relative to the base offset given in the index section.
11374 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11375 should be interpreted as relative to the base offset for .debug_line.dwo,
11376 and offsets into other debug sections obtained from DWARF attributes should
11377 also be interpreted as relative to the corresponding base offset.
11379 The table of sizes begins immediately following the table of offsets.
11380 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11381 with L columns and N rows, in row-major order. Each row in the array is
11382 indexed starting from 1 (row 0 is shared by the two tables).
11386 Hash table lookup is handled the same in version 1 and 2:
11388 We assume that N and M will not exceed 2^32 - 1.
11389 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11391 Given a 64-bit compilation unit signature or a type signature S, an entry
11392 in the hash table is located as follows:
11394 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11395 the low-order k bits all set to 1.
11397 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11399 3) If the hash table entry at index H matches the signature, use that
11400 entry. If the hash table entry at index H is unused (all zeroes),
11401 terminate the search: the signature is not present in the table.
11403 4) Let H = (H + H') modulo M. Repeat at Step 3.
11405 Because M > N and H' and M are relatively prime, the search is guaranteed
11406 to stop at an unused slot or find the match. */
11408 /* Create a hash table to map DWO IDs to their CU/TU entry in
11409 .debug_{info,types}.dwo in DWP_FILE.
11410 Returns NULL if there isn't one.
11411 Note: This function processes DWP files only, not DWO files. */
11413 static struct dwp_hash_table
*
11414 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11415 struct dwp_file
*dwp_file
, int is_debug_types
)
11417 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11418 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11419 const gdb_byte
*index_ptr
, *index_end
;
11420 struct dwarf2_section_info
*index
;
11421 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11422 struct dwp_hash_table
*htab
;
11424 if (is_debug_types
)
11425 index
= &dwp_file
->sections
.tu_index
;
11427 index
= &dwp_file
->sections
.cu_index
;
11429 if (index
->empty ())
11431 index
->read (objfile
);
11433 index_ptr
= index
->buffer
;
11434 index_end
= index_ptr
+ index
->size
;
11436 version
= read_4_bytes (dbfd
, index_ptr
);
11439 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11443 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11445 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11448 if (version
!= 1 && version
!= 2)
11450 error (_("Dwarf Error: unsupported DWP file version (%s)"
11451 " [in module %s]"),
11452 pulongest (version
), dwp_file
->name
);
11454 if (nr_slots
!= (nr_slots
& -nr_slots
))
11456 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11457 " is not power of 2 [in module %s]"),
11458 pulongest (nr_slots
), dwp_file
->name
);
11461 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
11462 htab
->version
= version
;
11463 htab
->nr_columns
= nr_columns
;
11464 htab
->nr_units
= nr_units
;
11465 htab
->nr_slots
= nr_slots
;
11466 htab
->hash_table
= index_ptr
;
11467 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11469 /* Exit early if the table is empty. */
11470 if (nr_slots
== 0 || nr_units
== 0
11471 || (version
== 2 && nr_columns
== 0))
11473 /* All must be zero. */
11474 if (nr_slots
!= 0 || nr_units
!= 0
11475 || (version
== 2 && nr_columns
!= 0))
11477 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11478 " all zero [in modules %s]"),
11486 htab
->section_pool
.v1
.indices
=
11487 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11488 /* It's harder to decide whether the section is too small in v1.
11489 V1 is deprecated anyway so we punt. */
11493 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11494 int *ids
= htab
->section_pool
.v2
.section_ids
;
11495 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11496 /* Reverse map for error checking. */
11497 int ids_seen
[DW_SECT_MAX
+ 1];
11500 if (nr_columns
< 2)
11502 error (_("Dwarf Error: bad DWP hash table, too few columns"
11503 " in section table [in module %s]"),
11506 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11508 error (_("Dwarf Error: bad DWP hash table, too many columns"
11509 " in section table [in module %s]"),
11512 memset (ids
, 255, sizeof_ids
);
11513 memset (ids_seen
, 255, sizeof (ids_seen
));
11514 for (i
= 0; i
< nr_columns
; ++i
)
11516 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11518 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11520 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11521 " in section table [in module %s]"),
11522 id
, dwp_file
->name
);
11524 if (ids_seen
[id
] != -1)
11526 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11527 " id %d in section table [in module %s]"),
11528 id
, dwp_file
->name
);
11533 /* Must have exactly one info or types section. */
11534 if (((ids_seen
[DW_SECT_INFO
] != -1)
11535 + (ids_seen
[DW_SECT_TYPES
] != -1))
11538 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11539 " DWO info/types section [in module %s]"),
11542 /* Must have an abbrev section. */
11543 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11545 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11546 " section [in module %s]"),
11549 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11550 htab
->section_pool
.v2
.sizes
=
11551 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11552 * nr_units
* nr_columns
);
11553 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11554 * nr_units
* nr_columns
))
11557 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11558 " [in module %s]"),
11566 /* Update SECTIONS with the data from SECTP.
11568 This function is like the other "locate" section routines that are
11569 passed to bfd_map_over_sections, but in this context the sections to
11570 read comes from the DWP V1 hash table, not the full ELF section table.
11572 The result is non-zero for success, or zero if an error was found. */
11575 locate_v1_virtual_dwo_sections (asection
*sectp
,
11576 struct virtual_v1_dwo_sections
*sections
)
11578 const struct dwop_section_names
*names
= &dwop_section_names
;
11580 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11582 /* There can be only one. */
11583 if (sections
->abbrev
.s
.section
!= NULL
)
11585 sections
->abbrev
.s
.section
= sectp
;
11586 sections
->abbrev
.size
= bfd_section_size (sectp
);
11588 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11589 || section_is_p (sectp
->name
, &names
->types_dwo
))
11591 /* There can be only one. */
11592 if (sections
->info_or_types
.s
.section
!= NULL
)
11594 sections
->info_or_types
.s
.section
= sectp
;
11595 sections
->info_or_types
.size
= bfd_section_size (sectp
);
11597 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11599 /* There can be only one. */
11600 if (sections
->line
.s
.section
!= NULL
)
11602 sections
->line
.s
.section
= sectp
;
11603 sections
->line
.size
= bfd_section_size (sectp
);
11605 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11607 /* There can be only one. */
11608 if (sections
->loc
.s
.section
!= NULL
)
11610 sections
->loc
.s
.section
= sectp
;
11611 sections
->loc
.size
= bfd_section_size (sectp
);
11613 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11615 /* There can be only one. */
11616 if (sections
->macinfo
.s
.section
!= NULL
)
11618 sections
->macinfo
.s
.section
= sectp
;
11619 sections
->macinfo
.size
= bfd_section_size (sectp
);
11621 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11623 /* There can be only one. */
11624 if (sections
->macro
.s
.section
!= NULL
)
11626 sections
->macro
.s
.section
= sectp
;
11627 sections
->macro
.size
= bfd_section_size (sectp
);
11629 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11631 /* There can be only one. */
11632 if (sections
->str_offsets
.s
.section
!= NULL
)
11634 sections
->str_offsets
.s
.section
= sectp
;
11635 sections
->str_offsets
.size
= bfd_section_size (sectp
);
11639 /* No other kind of section is valid. */
11646 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11647 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11648 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11649 This is for DWP version 1 files. */
11651 static struct dwo_unit
*
11652 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11653 struct dwp_file
*dwp_file
,
11654 uint32_t unit_index
,
11655 const char *comp_dir
,
11656 ULONGEST signature
, int is_debug_types
)
11658 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11659 const struct dwp_hash_table
*dwp_htab
=
11660 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11661 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11662 const char *kind
= is_debug_types
? "TU" : "CU";
11663 struct dwo_file
*dwo_file
;
11664 struct dwo_unit
*dwo_unit
;
11665 struct virtual_v1_dwo_sections sections
;
11666 void **dwo_file_slot
;
11669 gdb_assert (dwp_file
->version
== 1);
11671 if (dwarf_read_debug
)
11673 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
11675 pulongest (unit_index
), hex_string (signature
),
11679 /* Fetch the sections of this DWO unit.
11680 Put a limit on the number of sections we look for so that bad data
11681 doesn't cause us to loop forever. */
11683 #define MAX_NR_V1_DWO_SECTIONS \
11684 (1 /* .debug_info or .debug_types */ \
11685 + 1 /* .debug_abbrev */ \
11686 + 1 /* .debug_line */ \
11687 + 1 /* .debug_loc */ \
11688 + 1 /* .debug_str_offsets */ \
11689 + 1 /* .debug_macro or .debug_macinfo */ \
11690 + 1 /* trailing zero */)
11692 memset (§ions
, 0, sizeof (sections
));
11694 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
11697 uint32_t section_nr
=
11698 read_4_bytes (dbfd
,
11699 dwp_htab
->section_pool
.v1
.indices
11700 + (unit_index
+ i
) * sizeof (uint32_t));
11702 if (section_nr
== 0)
11704 if (section_nr
>= dwp_file
->num_sections
)
11706 error (_("Dwarf Error: bad DWP hash table, section number too large"
11707 " [in module %s]"),
11711 sectp
= dwp_file
->elf_sections
[section_nr
];
11712 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
11714 error (_("Dwarf Error: bad DWP hash table, invalid section found"
11715 " [in module %s]"),
11721 || sections
.info_or_types
.empty ()
11722 || sections
.abbrev
.empty ())
11724 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
11725 " [in module %s]"),
11728 if (i
== MAX_NR_V1_DWO_SECTIONS
)
11730 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
11731 " [in module %s]"),
11735 /* It's easier for the rest of the code if we fake a struct dwo_file and
11736 have dwo_unit "live" in that. At least for now.
11738 The DWP file can be made up of a random collection of CUs and TUs.
11739 However, for each CU + set of TUs that came from the same original DWO
11740 file, we can combine them back into a virtual DWO file to save space
11741 (fewer struct dwo_file objects to allocate). Remember that for really
11742 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11744 std::string virtual_dwo_name
=
11745 string_printf ("virtual-dwo/%d-%d-%d-%d",
11746 sections
.abbrev
.get_id (),
11747 sections
.line
.get_id (),
11748 sections
.loc
.get_id (),
11749 sections
.str_offsets
.get_id ());
11750 /* Can we use an existing virtual DWO file? */
11751 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11752 virtual_dwo_name
.c_str (),
11754 /* Create one if necessary. */
11755 if (*dwo_file_slot
== NULL
)
11757 if (dwarf_read_debug
)
11759 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11760 virtual_dwo_name
.c_str ());
11762 dwo_file
= new struct dwo_file
;
11763 dwo_file
->dwo_name
= objfile
->intern (virtual_dwo_name
);
11764 dwo_file
->comp_dir
= comp_dir
;
11765 dwo_file
->sections
.abbrev
= sections
.abbrev
;
11766 dwo_file
->sections
.line
= sections
.line
;
11767 dwo_file
->sections
.loc
= sections
.loc
;
11768 dwo_file
->sections
.macinfo
= sections
.macinfo
;
11769 dwo_file
->sections
.macro
= sections
.macro
;
11770 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
11771 /* The "str" section is global to the entire DWP file. */
11772 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11773 /* The info or types section is assigned below to dwo_unit,
11774 there's no need to record it in dwo_file.
11775 Also, we can't simply record type sections in dwo_file because
11776 we record a pointer into the vector in dwo_unit. As we collect more
11777 types we'll grow the vector and eventually have to reallocate space
11778 for it, invalidating all copies of pointers into the previous
11780 *dwo_file_slot
= dwo_file
;
11784 if (dwarf_read_debug
)
11786 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11787 virtual_dwo_name
.c_str ());
11789 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11792 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11793 dwo_unit
->dwo_file
= dwo_file
;
11794 dwo_unit
->signature
= signature
;
11795 dwo_unit
->section
=
11796 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11797 *dwo_unit
->section
= sections
.info_or_types
;
11798 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11803 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
11804 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
11805 piece within that section used by a TU/CU, return a virtual section
11806 of just that piece. */
11808 static struct dwarf2_section_info
11809 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11810 struct dwarf2_section_info
*section
,
11811 bfd_size_type offset
, bfd_size_type size
)
11813 struct dwarf2_section_info result
;
11816 gdb_assert (section
!= NULL
);
11817 gdb_assert (!section
->is_virtual
);
11819 memset (&result
, 0, sizeof (result
));
11820 result
.s
.containing_section
= section
;
11821 result
.is_virtual
= true;
11826 sectp
= section
->get_bfd_section ();
11828 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
11829 bounds of the real section. This is a pretty-rare event, so just
11830 flag an error (easier) instead of a warning and trying to cope. */
11832 || offset
+ size
> bfd_section_size (sectp
))
11834 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
11835 " in section %s [in module %s]"),
11836 sectp
? bfd_section_name (sectp
) : "<unknown>",
11837 objfile_name (dwarf2_per_objfile
->objfile
));
11840 result
.virtual_offset
= offset
;
11841 result
.size
= size
;
11845 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11846 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11847 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11848 This is for DWP version 2 files. */
11850 static struct dwo_unit
*
11851 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11852 struct dwp_file
*dwp_file
,
11853 uint32_t unit_index
,
11854 const char *comp_dir
,
11855 ULONGEST signature
, int is_debug_types
)
11857 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11858 const struct dwp_hash_table
*dwp_htab
=
11859 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11860 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11861 const char *kind
= is_debug_types
? "TU" : "CU";
11862 struct dwo_file
*dwo_file
;
11863 struct dwo_unit
*dwo_unit
;
11864 struct virtual_v2_dwo_sections sections
;
11865 void **dwo_file_slot
;
11868 gdb_assert (dwp_file
->version
== 2);
11870 if (dwarf_read_debug
)
11872 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
11874 pulongest (unit_index
), hex_string (signature
),
11878 /* Fetch the section offsets of this DWO unit. */
11880 memset (§ions
, 0, sizeof (sections
));
11882 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
11884 uint32_t offset
= read_4_bytes (dbfd
,
11885 dwp_htab
->section_pool
.v2
.offsets
11886 + (((unit_index
- 1) * dwp_htab
->nr_columns
11888 * sizeof (uint32_t)));
11889 uint32_t size
= read_4_bytes (dbfd
,
11890 dwp_htab
->section_pool
.v2
.sizes
11891 + (((unit_index
- 1) * dwp_htab
->nr_columns
11893 * sizeof (uint32_t)));
11895 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
11898 case DW_SECT_TYPES
:
11899 sections
.info_or_types_offset
= offset
;
11900 sections
.info_or_types_size
= size
;
11902 case DW_SECT_ABBREV
:
11903 sections
.abbrev_offset
= offset
;
11904 sections
.abbrev_size
= size
;
11907 sections
.line_offset
= offset
;
11908 sections
.line_size
= size
;
11911 sections
.loc_offset
= offset
;
11912 sections
.loc_size
= size
;
11914 case DW_SECT_STR_OFFSETS
:
11915 sections
.str_offsets_offset
= offset
;
11916 sections
.str_offsets_size
= size
;
11918 case DW_SECT_MACINFO
:
11919 sections
.macinfo_offset
= offset
;
11920 sections
.macinfo_size
= size
;
11922 case DW_SECT_MACRO
:
11923 sections
.macro_offset
= offset
;
11924 sections
.macro_size
= size
;
11929 /* It's easier for the rest of the code if we fake a struct dwo_file and
11930 have dwo_unit "live" in that. At least for now.
11932 The DWP file can be made up of a random collection of CUs and TUs.
11933 However, for each CU + set of TUs that came from the same original DWO
11934 file, we can combine them back into a virtual DWO file to save space
11935 (fewer struct dwo_file objects to allocate). Remember that for really
11936 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11938 std::string virtual_dwo_name
=
11939 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
11940 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
11941 (long) (sections
.line_size
? sections
.line_offset
: 0),
11942 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
11943 (long) (sections
.str_offsets_size
11944 ? sections
.str_offsets_offset
: 0));
11945 /* Can we use an existing virtual DWO file? */
11946 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11947 virtual_dwo_name
.c_str (),
11949 /* Create one if necessary. */
11950 if (*dwo_file_slot
== NULL
)
11952 if (dwarf_read_debug
)
11954 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11955 virtual_dwo_name
.c_str ());
11957 dwo_file
= new struct dwo_file
;
11958 dwo_file
->dwo_name
= objfile
->intern (virtual_dwo_name
);
11959 dwo_file
->comp_dir
= comp_dir
;
11960 dwo_file
->sections
.abbrev
=
11961 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
11962 sections
.abbrev_offset
, sections
.abbrev_size
);
11963 dwo_file
->sections
.line
=
11964 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
11965 sections
.line_offset
, sections
.line_size
);
11966 dwo_file
->sections
.loc
=
11967 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
11968 sections
.loc_offset
, sections
.loc_size
);
11969 dwo_file
->sections
.macinfo
=
11970 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
11971 sections
.macinfo_offset
, sections
.macinfo_size
);
11972 dwo_file
->sections
.macro
=
11973 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
11974 sections
.macro_offset
, sections
.macro_size
);
11975 dwo_file
->sections
.str_offsets
=
11976 create_dwp_v2_section (dwarf2_per_objfile
,
11977 &dwp_file
->sections
.str_offsets
,
11978 sections
.str_offsets_offset
,
11979 sections
.str_offsets_size
);
11980 /* The "str" section is global to the entire DWP file. */
11981 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11982 /* The info or types section is assigned below to dwo_unit,
11983 there's no need to record it in dwo_file.
11984 Also, we can't simply record type sections in dwo_file because
11985 we record a pointer into the vector in dwo_unit. As we collect more
11986 types we'll grow the vector and eventually have to reallocate space
11987 for it, invalidating all copies of pointers into the previous
11989 *dwo_file_slot
= dwo_file
;
11993 if (dwarf_read_debug
)
11995 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11996 virtual_dwo_name
.c_str ());
11998 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12001 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12002 dwo_unit
->dwo_file
= dwo_file
;
12003 dwo_unit
->signature
= signature
;
12004 dwo_unit
->section
=
12005 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12006 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12008 ? &dwp_file
->sections
.types
12009 : &dwp_file
->sections
.info
,
12010 sections
.info_or_types_offset
,
12011 sections
.info_or_types_size
);
12012 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12017 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12018 Returns NULL if the signature isn't found. */
12020 static struct dwo_unit
*
12021 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12022 struct dwp_file
*dwp_file
, const char *comp_dir
,
12023 ULONGEST signature
, int is_debug_types
)
12025 const struct dwp_hash_table
*dwp_htab
=
12026 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12027 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12028 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12029 uint32_t hash
= signature
& mask
;
12030 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12033 struct dwo_unit find_dwo_cu
;
12035 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12036 find_dwo_cu
.signature
= signature
;
12037 slot
= htab_find_slot (is_debug_types
12038 ? dwp_file
->loaded_tus
.get ()
12039 : dwp_file
->loaded_cus
.get (),
12040 &find_dwo_cu
, INSERT
);
12043 return (struct dwo_unit
*) *slot
;
12045 /* Use a for loop so that we don't loop forever on bad debug info. */
12046 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12048 ULONGEST signature_in_table
;
12050 signature_in_table
=
12051 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12052 if (signature_in_table
== signature
)
12054 uint32_t unit_index
=
12055 read_4_bytes (dbfd
,
12056 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12058 if (dwp_file
->version
== 1)
12060 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12061 dwp_file
, unit_index
,
12062 comp_dir
, signature
,
12067 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12068 dwp_file
, unit_index
,
12069 comp_dir
, signature
,
12072 return (struct dwo_unit
*) *slot
;
12074 if (signature_in_table
== 0)
12076 hash
= (hash
+ hash2
) & mask
;
12079 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12080 " [in module %s]"),
12084 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12085 Open the file specified by FILE_NAME and hand it off to BFD for
12086 preliminary analysis. Return a newly initialized bfd *, which
12087 includes a canonicalized copy of FILE_NAME.
12088 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12089 SEARCH_CWD is true if the current directory is to be searched.
12090 It will be searched before debug-file-directory.
12091 If successful, the file is added to the bfd include table of the
12092 objfile's bfd (see gdb_bfd_record_inclusion).
12093 If unable to find/open the file, return NULL.
12094 NOTE: This function is derived from symfile_bfd_open. */
12096 static gdb_bfd_ref_ptr
12097 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12098 const char *file_name
, int is_dwp
, int search_cwd
)
12101 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12102 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12103 to debug_file_directory. */
12104 const char *search_path
;
12105 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12107 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12110 if (*debug_file_directory
!= '\0')
12112 search_path_holder
.reset (concat (".", dirname_separator_string
,
12113 debug_file_directory
,
12115 search_path
= search_path_holder
.get ();
12121 search_path
= debug_file_directory
;
12123 openp_flags flags
= OPF_RETURN_REALPATH
;
12125 flags
|= OPF_SEARCH_IN_PATH
;
12127 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12128 desc
= openp (search_path
, flags
, file_name
,
12129 O_RDONLY
| O_BINARY
, &absolute_name
);
12133 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12135 if (sym_bfd
== NULL
)
12137 bfd_set_cacheable (sym_bfd
.get (), 1);
12139 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12142 /* Success. Record the bfd as having been included by the objfile's bfd.
12143 This is important because things like demangled_names_hash lives in the
12144 objfile's per_bfd space and may have references to things like symbol
12145 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12146 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12151 /* Try to open DWO file FILE_NAME.
12152 COMP_DIR is the DW_AT_comp_dir attribute.
12153 The result is the bfd handle of the file.
12154 If there is a problem finding or opening the file, return NULL.
12155 Upon success, the canonicalized path of the file is stored in the bfd,
12156 same as symfile_bfd_open. */
12158 static gdb_bfd_ref_ptr
12159 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12160 const char *file_name
, const char *comp_dir
)
12162 if (IS_ABSOLUTE_PATH (file_name
))
12163 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12164 0 /*is_dwp*/, 0 /*search_cwd*/);
12166 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12168 if (comp_dir
!= NULL
)
12170 gdb::unique_xmalloc_ptr
<char> path_to_try
12171 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12173 /* NOTE: If comp_dir is a relative path, this will also try the
12174 search path, which seems useful. */
12175 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12176 path_to_try
.get (),
12178 1 /*search_cwd*/));
12183 /* That didn't work, try debug-file-directory, which, despite its name,
12184 is a list of paths. */
12186 if (*debug_file_directory
== '\0')
12189 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12190 0 /*is_dwp*/, 1 /*search_cwd*/);
12193 /* This function is mapped across the sections and remembers the offset and
12194 size of each of the DWO debugging sections we are interested in. */
12197 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12199 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12200 const struct dwop_section_names
*names
= &dwop_section_names
;
12202 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12204 dwo_sections
->abbrev
.s
.section
= sectp
;
12205 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12207 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12209 dwo_sections
->info
.s
.section
= sectp
;
12210 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12212 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12214 dwo_sections
->line
.s
.section
= sectp
;
12215 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12217 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12219 dwo_sections
->loc
.s
.section
= sectp
;
12220 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12222 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12224 dwo_sections
->loclists
.s
.section
= sectp
;
12225 dwo_sections
->loclists
.size
= bfd_section_size (sectp
);
12227 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12229 dwo_sections
->macinfo
.s
.section
= sectp
;
12230 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12232 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12234 dwo_sections
->macro
.s
.section
= sectp
;
12235 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12237 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12239 dwo_sections
->str
.s
.section
= sectp
;
12240 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12242 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12244 dwo_sections
->str_offsets
.s
.section
= sectp
;
12245 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12247 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12249 struct dwarf2_section_info type_section
;
12251 memset (&type_section
, 0, sizeof (type_section
));
12252 type_section
.s
.section
= sectp
;
12253 type_section
.size
= bfd_section_size (sectp
);
12254 dwo_sections
->types
.push_back (type_section
);
12258 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12259 by PER_CU. This is for the non-DWP case.
12260 The result is NULL if DWO_NAME can't be found. */
12262 static struct dwo_file
*
12263 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12264 const char *dwo_name
, const char *comp_dir
)
12266 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12268 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12271 if (dwarf_read_debug
)
12272 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12276 dwo_file_up
dwo_file (new struct dwo_file
);
12277 dwo_file
->dwo_name
= dwo_name
;
12278 dwo_file
->comp_dir
= comp_dir
;
12279 dwo_file
->dbfd
= std::move (dbfd
);
12281 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12282 &dwo_file
->sections
);
12284 create_cus_hash_table (dwarf2_per_objfile
, per_cu
->cu
, *dwo_file
,
12285 dwo_file
->sections
.info
, dwo_file
->cus
);
12287 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12288 dwo_file
->sections
.types
, dwo_file
->tus
);
12290 if (dwarf_read_debug
)
12291 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12293 return dwo_file
.release ();
12296 /* This function is mapped across the sections and remembers the offset and
12297 size of each of the DWP debugging sections common to version 1 and 2 that
12298 we are interested in. */
12301 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12302 void *dwp_file_ptr
)
12304 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12305 const struct dwop_section_names
*names
= &dwop_section_names
;
12306 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12308 /* Record the ELF section number for later lookup: this is what the
12309 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12310 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12311 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12313 /* Look for specific sections that we need. */
12314 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12316 dwp_file
->sections
.str
.s
.section
= sectp
;
12317 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12319 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12321 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12322 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12324 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12326 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12327 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12331 /* This function is mapped across the sections and remembers the offset and
12332 size of each of the DWP version 2 debugging sections that we are interested
12333 in. This is split into a separate function because we don't know if we
12334 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12337 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12339 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12340 const struct dwop_section_names
*names
= &dwop_section_names
;
12341 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12343 /* Record the ELF section number for later lookup: this is what the
12344 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12345 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12346 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12348 /* Look for specific sections that we need. */
12349 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12351 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12352 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12354 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12356 dwp_file
->sections
.info
.s
.section
= sectp
;
12357 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12359 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12361 dwp_file
->sections
.line
.s
.section
= sectp
;
12362 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12364 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12366 dwp_file
->sections
.loc
.s
.section
= sectp
;
12367 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12369 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12371 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12372 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12374 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12376 dwp_file
->sections
.macro
.s
.section
= sectp
;
12377 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12379 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12381 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12382 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12384 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12386 dwp_file
->sections
.types
.s
.section
= sectp
;
12387 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
12391 /* Hash function for dwp_file loaded CUs/TUs. */
12394 hash_dwp_loaded_cutus (const void *item
)
12396 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
12398 /* This drops the top 32 bits of the signature, but is ok for a hash. */
12399 return dwo_unit
->signature
;
12402 /* Equality function for dwp_file loaded CUs/TUs. */
12405 eq_dwp_loaded_cutus (const void *a
, const void *b
)
12407 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
12408 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
12410 return dua
->signature
== dub
->signature
;
12413 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
12416 allocate_dwp_loaded_cutus_table ()
12418 return htab_up (htab_create_alloc (3,
12419 hash_dwp_loaded_cutus
,
12420 eq_dwp_loaded_cutus
,
12421 NULL
, xcalloc
, xfree
));
12424 /* Try to open DWP file FILE_NAME.
12425 The result is the bfd handle of the file.
12426 If there is a problem finding or opening the file, return NULL.
12427 Upon success, the canonicalized path of the file is stored in the bfd,
12428 same as symfile_bfd_open. */
12430 static gdb_bfd_ref_ptr
12431 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12432 const char *file_name
)
12434 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12436 1 /*search_cwd*/));
12440 /* Work around upstream bug 15652.
12441 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
12442 [Whether that's a "bug" is debatable, but it is getting in our way.]
12443 We have no real idea where the dwp file is, because gdb's realpath-ing
12444 of the executable's path may have discarded the needed info.
12445 [IWBN if the dwp file name was recorded in the executable, akin to
12446 .gnu_debuglink, but that doesn't exist yet.]
12447 Strip the directory from FILE_NAME and search again. */
12448 if (*debug_file_directory
!= '\0')
12450 /* Don't implicitly search the current directory here.
12451 If the user wants to search "." to handle this case,
12452 it must be added to debug-file-directory. */
12453 return try_open_dwop_file (dwarf2_per_objfile
,
12454 lbasename (file_name
), 1 /*is_dwp*/,
12461 /* Initialize the use of the DWP file for the current objfile.
12462 By convention the name of the DWP file is ${objfile}.dwp.
12463 The result is NULL if it can't be found. */
12465 static std::unique_ptr
<struct dwp_file
>
12466 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12468 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12470 /* Try to find first .dwp for the binary file before any symbolic links
12473 /* If the objfile is a debug file, find the name of the real binary
12474 file and get the name of dwp file from there. */
12475 std::string dwp_name
;
12476 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
12478 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
12479 const char *backlink_basename
= lbasename (backlink
->original_name
);
12481 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
12484 dwp_name
= objfile
->original_name
;
12486 dwp_name
+= ".dwp";
12488 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
12490 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
12492 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
12493 dwp_name
= objfile_name (objfile
);
12494 dwp_name
+= ".dwp";
12495 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
12500 if (dwarf_read_debug
)
12501 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
12502 return std::unique_ptr
<dwp_file
> ();
12505 const char *name
= bfd_get_filename (dbfd
.get ());
12506 std::unique_ptr
<struct dwp_file
> dwp_file
12507 (new struct dwp_file (name
, std::move (dbfd
)));
12509 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
12510 dwp_file
->elf_sections
=
12511 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
12512 dwp_file
->num_sections
, asection
*);
12514 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12515 dwarf2_locate_common_dwp_sections
,
12518 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12521 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12524 /* The DWP file version is stored in the hash table. Oh well. */
12525 if (dwp_file
->cus
&& dwp_file
->tus
12526 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
12528 /* Technically speaking, we should try to limp along, but this is
12529 pretty bizarre. We use pulongest here because that's the established
12530 portability solution (e.g, we cannot use %u for uint32_t). */
12531 error (_("Dwarf Error: DWP file CU version %s doesn't match"
12532 " TU version %s [in DWP file %s]"),
12533 pulongest (dwp_file
->cus
->version
),
12534 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12538 dwp_file
->version
= dwp_file
->cus
->version
;
12539 else if (dwp_file
->tus
)
12540 dwp_file
->version
= dwp_file
->tus
->version
;
12542 dwp_file
->version
= 2;
12544 if (dwp_file
->version
== 2)
12545 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12546 dwarf2_locate_v2_dwp_sections
,
12549 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table ();
12550 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table ();
12552 if (dwarf_read_debug
)
12554 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12555 fprintf_unfiltered (gdb_stdlog
,
12556 " %s CUs, %s TUs\n",
12557 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12558 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12564 /* Wrapper around open_and_init_dwp_file, only open it once. */
12566 static struct dwp_file
*
12567 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12569 if (! dwarf2_per_objfile
->dwp_checked
)
12571 dwarf2_per_objfile
->dwp_file
12572 = open_and_init_dwp_file (dwarf2_per_objfile
);
12573 dwarf2_per_objfile
->dwp_checked
= 1;
12575 return dwarf2_per_objfile
->dwp_file
.get ();
12578 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12579 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12580 or in the DWP file for the objfile, referenced by THIS_UNIT.
12581 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12582 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12584 This is called, for example, when wanting to read a variable with a
12585 complex location. Therefore we don't want to do file i/o for every call.
12586 Therefore we don't want to look for a DWO file on every call.
12587 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12588 then we check if we've already seen DWO_NAME, and only THEN do we check
12591 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12592 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12594 static struct dwo_unit
*
12595 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
12596 const char *dwo_name
, const char *comp_dir
,
12597 ULONGEST signature
, int is_debug_types
)
12599 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
12600 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12601 const char *kind
= is_debug_types
? "TU" : "CU";
12602 void **dwo_file_slot
;
12603 struct dwo_file
*dwo_file
;
12604 struct dwp_file
*dwp_file
;
12606 /* First see if there's a DWP file.
12607 If we have a DWP file but didn't find the DWO inside it, don't
12608 look for the original DWO file. It makes gdb behave differently
12609 depending on whether one is debugging in the build tree. */
12611 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
12612 if (dwp_file
!= NULL
)
12614 const struct dwp_hash_table
*dwp_htab
=
12615 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12617 if (dwp_htab
!= NULL
)
12619 struct dwo_unit
*dwo_cutu
=
12620 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
12621 signature
, is_debug_types
);
12623 if (dwo_cutu
!= NULL
)
12625 if (dwarf_read_debug
)
12627 fprintf_unfiltered (gdb_stdlog
,
12628 "Virtual DWO %s %s found: @%s\n",
12629 kind
, hex_string (signature
),
12630 host_address_to_string (dwo_cutu
));
12638 /* No DWP file, look for the DWO file. */
12640 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12641 dwo_name
, comp_dir
);
12642 if (*dwo_file_slot
== NULL
)
12644 /* Read in the file and build a table of the CUs/TUs it contains. */
12645 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
12647 /* NOTE: This will be NULL if unable to open the file. */
12648 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12650 if (dwo_file
!= NULL
)
12652 struct dwo_unit
*dwo_cutu
= NULL
;
12654 if (is_debug_types
&& dwo_file
->tus
)
12656 struct dwo_unit find_dwo_cutu
;
12658 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12659 find_dwo_cutu
.signature
= signature
;
12661 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
12664 else if (!is_debug_types
&& dwo_file
->cus
)
12666 struct dwo_unit find_dwo_cutu
;
12668 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12669 find_dwo_cutu
.signature
= signature
;
12670 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
12674 if (dwo_cutu
!= NULL
)
12676 if (dwarf_read_debug
)
12678 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
12679 kind
, dwo_name
, hex_string (signature
),
12680 host_address_to_string (dwo_cutu
));
12687 /* We didn't find it. This could mean a dwo_id mismatch, or
12688 someone deleted the DWO/DWP file, or the search path isn't set up
12689 correctly to find the file. */
12691 if (dwarf_read_debug
)
12693 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
12694 kind
, dwo_name
, hex_string (signature
));
12697 /* This is a warning and not a complaint because it can be caused by
12698 pilot error (e.g., user accidentally deleting the DWO). */
12700 /* Print the name of the DWP file if we looked there, helps the user
12701 better diagnose the problem. */
12702 std::string dwp_text
;
12704 if (dwp_file
!= NULL
)
12705 dwp_text
= string_printf (" [in DWP file %s]",
12706 lbasename (dwp_file
->name
));
12708 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
12709 " [in module %s]"),
12710 kind
, dwo_name
, hex_string (signature
),
12712 this_unit
->is_debug_types
? "TU" : "CU",
12713 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
12718 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
12719 See lookup_dwo_cutu_unit for details. */
12721 static struct dwo_unit
*
12722 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
12723 const char *dwo_name
, const char *comp_dir
,
12724 ULONGEST signature
)
12726 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
12729 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
12730 See lookup_dwo_cutu_unit for details. */
12732 static struct dwo_unit
*
12733 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
12734 const char *dwo_name
, const char *comp_dir
)
12736 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
12739 /* Traversal function for queue_and_load_all_dwo_tus. */
12742 queue_and_load_dwo_tu (void **slot
, void *info
)
12744 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
12745 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
12746 ULONGEST signature
= dwo_unit
->signature
;
12747 struct signatured_type
*sig_type
=
12748 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
12750 if (sig_type
!= NULL
)
12752 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
12754 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
12755 a real dependency of PER_CU on SIG_TYPE. That is detected later
12756 while processing PER_CU. */
12757 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
12758 load_full_type_unit (sig_cu
);
12759 per_cu
->imported_symtabs_push (sig_cu
);
12765 /* Queue all TUs contained in the DWO of PER_CU to be read in.
12766 The DWO may have the only definition of the type, though it may not be
12767 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
12768 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
12771 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
12773 struct dwo_unit
*dwo_unit
;
12774 struct dwo_file
*dwo_file
;
12776 gdb_assert (!per_cu
->is_debug_types
);
12777 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
12778 gdb_assert (per_cu
->cu
!= NULL
);
12780 dwo_unit
= per_cu
->cu
->dwo_unit
;
12781 gdb_assert (dwo_unit
!= NULL
);
12783 dwo_file
= dwo_unit
->dwo_file
;
12784 if (dwo_file
->tus
!= NULL
)
12785 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
,
12789 /* Read in various DIEs. */
12791 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
12792 Inherit only the children of the DW_AT_abstract_origin DIE not being
12793 already referenced by DW_AT_abstract_origin from the children of the
12797 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
12799 struct die_info
*child_die
;
12800 sect_offset
*offsetp
;
12801 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
12802 struct die_info
*origin_die
;
12803 /* Iterator of the ORIGIN_DIE children. */
12804 struct die_info
*origin_child_die
;
12805 struct attribute
*attr
;
12806 struct dwarf2_cu
*origin_cu
;
12807 struct pending
**origin_previous_list_in_scope
;
12809 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12813 /* Note that following die references may follow to a die in a
12817 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
12819 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
12821 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
12822 origin_cu
->list_in_scope
= cu
->list_in_scope
;
12824 if (die
->tag
!= origin_die
->tag
12825 && !(die
->tag
== DW_TAG_inlined_subroutine
12826 && origin_die
->tag
== DW_TAG_subprogram
))
12827 complaint (_("DIE %s and its abstract origin %s have different tags"),
12828 sect_offset_str (die
->sect_off
),
12829 sect_offset_str (origin_die
->sect_off
));
12831 std::vector
<sect_offset
> offsets
;
12833 for (child_die
= die
->child
;
12834 child_die
&& child_die
->tag
;
12835 child_die
= child_die
->sibling
)
12837 struct die_info
*child_origin_die
;
12838 struct dwarf2_cu
*child_origin_cu
;
12840 /* We are trying to process concrete instance entries:
12841 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
12842 it's not relevant to our analysis here. i.e. detecting DIEs that are
12843 present in the abstract instance but not referenced in the concrete
12845 if (child_die
->tag
== DW_TAG_call_site
12846 || child_die
->tag
== DW_TAG_GNU_call_site
)
12849 /* For each CHILD_DIE, find the corresponding child of
12850 ORIGIN_DIE. If there is more than one layer of
12851 DW_AT_abstract_origin, follow them all; there shouldn't be,
12852 but GCC versions at least through 4.4 generate this (GCC PR
12854 child_origin_die
= child_die
;
12855 child_origin_cu
= cu
;
12858 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
12862 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
12866 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
12867 counterpart may exist. */
12868 if (child_origin_die
!= child_die
)
12870 if (child_die
->tag
!= child_origin_die
->tag
12871 && !(child_die
->tag
== DW_TAG_inlined_subroutine
12872 && child_origin_die
->tag
== DW_TAG_subprogram
))
12873 complaint (_("Child DIE %s and its abstract origin %s have "
12875 sect_offset_str (child_die
->sect_off
),
12876 sect_offset_str (child_origin_die
->sect_off
));
12877 if (child_origin_die
->parent
!= origin_die
)
12878 complaint (_("Child DIE %s and its abstract origin %s have "
12879 "different parents"),
12880 sect_offset_str (child_die
->sect_off
),
12881 sect_offset_str (child_origin_die
->sect_off
));
12883 offsets
.push_back (child_origin_die
->sect_off
);
12886 std::sort (offsets
.begin (), offsets
.end ());
12887 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
12888 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
12889 if (offsetp
[-1] == *offsetp
)
12890 complaint (_("Multiple children of DIE %s refer "
12891 "to DIE %s as their abstract origin"),
12892 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
12894 offsetp
= offsets
.data ();
12895 origin_child_die
= origin_die
->child
;
12896 while (origin_child_die
&& origin_child_die
->tag
)
12898 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
12899 while (offsetp
< offsets_end
12900 && *offsetp
< origin_child_die
->sect_off
)
12902 if (offsetp
>= offsets_end
12903 || *offsetp
> origin_child_die
->sect_off
)
12905 /* Found that ORIGIN_CHILD_DIE is really not referenced.
12906 Check whether we're already processing ORIGIN_CHILD_DIE.
12907 This can happen with mutually referenced abstract_origins.
12909 if (!origin_child_die
->in_process
)
12910 process_die (origin_child_die
, origin_cu
);
12912 origin_child_die
= origin_child_die
->sibling
;
12914 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
12916 if (cu
!= origin_cu
)
12917 compute_delayed_physnames (origin_cu
);
12921 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12923 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
12924 struct gdbarch
*gdbarch
= objfile
->arch ();
12925 struct context_stack
*newobj
;
12928 struct die_info
*child_die
;
12929 struct attribute
*attr
, *call_line
, *call_file
;
12931 CORE_ADDR baseaddr
;
12932 struct block
*block
;
12933 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
12934 std::vector
<struct symbol
*> template_args
;
12935 struct template_symbol
*templ_func
= NULL
;
12939 /* If we do not have call site information, we can't show the
12940 caller of this inlined function. That's too confusing, so
12941 only use the scope for local variables. */
12942 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
12943 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
12944 if (call_line
== NULL
|| call_file
== NULL
)
12946 read_lexical_block_scope (die
, cu
);
12951 baseaddr
= objfile
->text_section_offset ();
12953 name
= dwarf2_name (die
, cu
);
12955 /* Ignore functions with missing or empty names. These are actually
12956 illegal according to the DWARF standard. */
12959 complaint (_("missing name for subprogram DIE at %s"),
12960 sect_offset_str (die
->sect_off
));
12964 /* Ignore functions with missing or invalid low and high pc attributes. */
12965 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
12966 <= PC_BOUNDS_INVALID
)
12968 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
12969 if (!attr
|| !DW_UNSND (attr
))
12970 complaint (_("cannot get low and high bounds "
12971 "for subprogram DIE at %s"),
12972 sect_offset_str (die
->sect_off
));
12976 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12977 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
12979 /* If we have any template arguments, then we must allocate a
12980 different sort of symbol. */
12981 for (child_die
= die
->child
; child_die
; child_die
= child_die
->sibling
)
12983 if (child_die
->tag
== DW_TAG_template_type_param
12984 || child_die
->tag
== DW_TAG_template_value_param
)
12986 templ_func
= allocate_template_symbol (objfile
);
12987 templ_func
->subclass
= SYMBOL_TEMPLATE
;
12992 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
12993 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
12994 (struct symbol
*) templ_func
);
12996 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
12997 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
13000 /* If there is a location expression for DW_AT_frame_base, record
13002 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13003 if (attr
!= nullptr)
13004 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13006 /* If there is a location for the static link, record it. */
13007 newobj
->static_link
= NULL
;
13008 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13009 if (attr
!= nullptr)
13011 newobj
->static_link
13012 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13013 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13014 cu
->per_cu
->addr_type ());
13017 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13019 if (die
->child
!= NULL
)
13021 child_die
= die
->child
;
13022 while (child_die
&& child_die
->tag
)
13024 if (child_die
->tag
== DW_TAG_template_type_param
13025 || child_die
->tag
== DW_TAG_template_value_param
)
13027 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13030 template_args
.push_back (arg
);
13033 process_die (child_die
, cu
);
13034 child_die
= child_die
->sibling
;
13038 inherit_abstract_dies (die
, cu
);
13040 /* If we have a DW_AT_specification, we might need to import using
13041 directives from the context of the specification DIE. See the
13042 comment in determine_prefix. */
13043 if (cu
->language
== language_cplus
13044 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13046 struct dwarf2_cu
*spec_cu
= cu
;
13047 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13051 child_die
= spec_die
->child
;
13052 while (child_die
&& child_die
->tag
)
13054 if (child_die
->tag
== DW_TAG_imported_module
)
13055 process_die (child_die
, spec_cu
);
13056 child_die
= child_die
->sibling
;
13059 /* In some cases, GCC generates specification DIEs that
13060 themselves contain DW_AT_specification attributes. */
13061 spec_die
= die_specification (spec_die
, &spec_cu
);
13065 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13066 /* Make a block for the local symbols within. */
13067 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13068 cstk
.static_link
, lowpc
, highpc
);
13070 /* For C++, set the block's scope. */
13071 if ((cu
->language
== language_cplus
13072 || cu
->language
== language_fortran
13073 || cu
->language
== language_d
13074 || cu
->language
== language_rust
)
13075 && cu
->processing_has_namespace_info
)
13076 block_set_scope (block
, determine_prefix (die
, cu
),
13077 &objfile
->objfile_obstack
);
13079 /* If we have address ranges, record them. */
13080 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13082 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13084 /* Attach template arguments to function. */
13085 if (!template_args
.empty ())
13087 gdb_assert (templ_func
!= NULL
);
13089 templ_func
->n_template_arguments
= template_args
.size ();
13090 templ_func
->template_arguments
13091 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13092 templ_func
->n_template_arguments
);
13093 memcpy (templ_func
->template_arguments
,
13094 template_args
.data (),
13095 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13097 /* Make sure that the symtab is set on the new symbols. Even
13098 though they don't appear in this symtab directly, other parts
13099 of gdb assume that symbols do, and this is reasonably
13101 for (symbol
*sym
: template_args
)
13102 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13105 /* In C++, we can have functions nested inside functions (e.g., when
13106 a function declares a class that has methods). This means that
13107 when we finish processing a function scope, we may need to go
13108 back to building a containing block's symbol lists. */
13109 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13110 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13112 /* If we've finished processing a top-level function, subsequent
13113 symbols go in the file symbol list. */
13114 if (cu
->get_builder ()->outermost_context_p ())
13115 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13118 /* Process all the DIES contained within a lexical block scope. Start
13119 a new scope, process the dies, and then close the scope. */
13122 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13124 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13125 struct gdbarch
*gdbarch
= objfile
->arch ();
13126 CORE_ADDR lowpc
, highpc
;
13127 struct die_info
*child_die
;
13128 CORE_ADDR baseaddr
;
13130 baseaddr
= objfile
->text_section_offset ();
13132 /* Ignore blocks with missing or invalid low and high pc attributes. */
13133 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13134 as multiple lexical blocks? Handling children in a sane way would
13135 be nasty. Might be easier to properly extend generic blocks to
13136 describe ranges. */
13137 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13139 case PC_BOUNDS_NOT_PRESENT
:
13140 /* DW_TAG_lexical_block has no attributes, process its children as if
13141 there was no wrapping by that DW_TAG_lexical_block.
13142 GCC does no longer produces such DWARF since GCC r224161. */
13143 for (child_die
= die
->child
;
13144 child_die
!= NULL
&& child_die
->tag
;
13145 child_die
= child_die
->sibling
)
13147 /* We might already be processing this DIE. This can happen
13148 in an unusual circumstance -- where a subroutine A
13149 appears lexically in another subroutine B, but A actually
13150 inlines B. The recursion is broken here, rather than in
13151 inherit_abstract_dies, because it seems better to simply
13152 drop concrete children here. */
13153 if (!child_die
->in_process
)
13154 process_die (child_die
, cu
);
13157 case PC_BOUNDS_INVALID
:
13160 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13161 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13163 cu
->get_builder ()->push_context (0, lowpc
);
13164 if (die
->child
!= NULL
)
13166 child_die
= die
->child
;
13167 while (child_die
&& child_die
->tag
)
13169 process_die (child_die
, cu
);
13170 child_die
= child_die
->sibling
;
13173 inherit_abstract_dies (die
, cu
);
13174 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13176 if (*cu
->get_builder ()->get_local_symbols () != NULL
13177 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13179 struct block
*block
13180 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13181 cstk
.start_addr
, highpc
);
13183 /* Note that recording ranges after traversing children, as we
13184 do here, means that recording a parent's ranges entails
13185 walking across all its children's ranges as they appear in
13186 the address map, which is quadratic behavior.
13188 It would be nicer to record the parent's ranges before
13189 traversing its children, simply overriding whatever you find
13190 there. But since we don't even decide whether to create a
13191 block until after we've traversed its children, that's hard
13193 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13195 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13196 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13199 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13202 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13204 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13205 struct gdbarch
*gdbarch
= objfile
->arch ();
13206 CORE_ADDR pc
, baseaddr
;
13207 struct attribute
*attr
;
13208 struct call_site
*call_site
, call_site_local
;
13211 struct die_info
*child_die
;
13213 baseaddr
= objfile
->text_section_offset ();
13215 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13218 /* This was a pre-DWARF-5 GNU extension alias
13219 for DW_AT_call_return_pc. */
13220 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13224 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13225 "DIE %s [in module %s]"),
13226 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13229 pc
= attr
->value_as_address () + baseaddr
;
13230 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13232 if (cu
->call_site_htab
== NULL
)
13233 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13234 NULL
, &objfile
->objfile_obstack
,
13235 hashtab_obstack_allocate
, NULL
);
13236 call_site_local
.pc
= pc
;
13237 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13240 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13241 "DIE %s [in module %s]"),
13242 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13243 objfile_name (objfile
));
13247 /* Count parameters at the caller. */
13250 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13251 child_die
= child_die
->sibling
)
13253 if (child_die
->tag
!= DW_TAG_call_site_parameter
13254 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13256 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13257 "DW_TAG_call_site child DIE %s [in module %s]"),
13258 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13259 objfile_name (objfile
));
13267 = ((struct call_site
*)
13268 obstack_alloc (&objfile
->objfile_obstack
,
13269 sizeof (*call_site
)
13270 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13272 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13273 call_site
->pc
= pc
;
13275 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13276 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13278 struct die_info
*func_die
;
13280 /* Skip also over DW_TAG_inlined_subroutine. */
13281 for (func_die
= die
->parent
;
13282 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13283 && func_die
->tag
!= DW_TAG_subroutine_type
;
13284 func_die
= func_die
->parent
);
13286 /* DW_AT_call_all_calls is a superset
13287 of DW_AT_call_all_tail_calls. */
13289 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13290 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13291 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13292 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13294 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13295 not complete. But keep CALL_SITE for look ups via call_site_htab,
13296 both the initial caller containing the real return address PC and
13297 the final callee containing the current PC of a chain of tail
13298 calls do not need to have the tail call list complete. But any
13299 function candidate for a virtual tail call frame searched via
13300 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13301 determined unambiguously. */
13305 struct type
*func_type
= NULL
;
13308 func_type
= get_die_type (func_die
, cu
);
13309 if (func_type
!= NULL
)
13311 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13313 /* Enlist this call site to the function. */
13314 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13315 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13318 complaint (_("Cannot find function owning DW_TAG_call_site "
13319 "DIE %s [in module %s]"),
13320 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13324 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13326 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13328 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13331 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13332 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13334 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13335 if (!attr
|| (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0))
13336 /* Keep NULL DWARF_BLOCK. */;
13337 else if (attr
->form_is_block ())
13339 struct dwarf2_locexpr_baton
*dlbaton
;
13341 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13342 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13343 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13344 dlbaton
->per_cu
= cu
->per_cu
;
13346 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13348 else if (attr
->form_is_ref ())
13350 struct dwarf2_cu
*target_cu
= cu
;
13351 struct die_info
*target_die
;
13353 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13354 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13355 if (die_is_declaration (target_die
, target_cu
))
13357 const char *target_physname
;
13359 /* Prefer the mangled name; otherwise compute the demangled one. */
13360 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13361 if (target_physname
== NULL
)
13362 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13363 if (target_physname
== NULL
)
13364 complaint (_("DW_AT_call_target target DIE has invalid "
13365 "physname, for referencing DIE %s [in module %s]"),
13366 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13368 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13374 /* DW_AT_entry_pc should be preferred. */
13375 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13376 <= PC_BOUNDS_INVALID
)
13377 complaint (_("DW_AT_call_target target DIE has invalid "
13378 "low pc, for referencing DIE %s [in module %s]"),
13379 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13382 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13383 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
13388 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
13389 "block nor reference, for DIE %s [in module %s]"),
13390 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13392 call_site
->per_cu
= cu
->per_cu
;
13394 for (child_die
= die
->child
;
13395 child_die
&& child_die
->tag
;
13396 child_die
= child_die
->sibling
)
13398 struct call_site_parameter
*parameter
;
13399 struct attribute
*loc
, *origin
;
13401 if (child_die
->tag
!= DW_TAG_call_site_parameter
13402 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13404 /* Already printed the complaint above. */
13408 gdb_assert (call_site
->parameter_count
< nparams
);
13409 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
13411 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
13412 specifies DW_TAG_formal_parameter. Value of the data assumed for the
13413 register is contained in DW_AT_call_value. */
13415 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
13416 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
13417 if (origin
== NULL
)
13419 /* This was a pre-DWARF-5 GNU extension alias
13420 for DW_AT_call_parameter. */
13421 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
13423 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
13425 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
13427 sect_offset sect_off
= origin
->get_ref_die_offset ();
13428 if (!cu
->header
.offset_in_cu_p (sect_off
))
13430 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
13431 binding can be done only inside one CU. Such referenced DIE
13432 therefore cannot be even moved to DW_TAG_partial_unit. */
13433 complaint (_("DW_AT_call_parameter offset is not in CU for "
13434 "DW_TAG_call_site child DIE %s [in module %s]"),
13435 sect_offset_str (child_die
->sect_off
),
13436 objfile_name (objfile
));
13439 parameter
->u
.param_cu_off
13440 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
13442 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
13444 complaint (_("No DW_FORM_block* DW_AT_location for "
13445 "DW_TAG_call_site child DIE %s [in module %s]"),
13446 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
13451 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
13452 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
13453 if (parameter
->u
.dwarf_reg
!= -1)
13454 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
13455 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
13456 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
13457 ¶meter
->u
.fb_offset
))
13458 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
13461 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
13462 "for DW_FORM_block* DW_AT_location is supported for "
13463 "DW_TAG_call_site child DIE %s "
13465 sect_offset_str (child_die
->sect_off
),
13466 objfile_name (objfile
));
13471 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
13473 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
13474 if (attr
== NULL
|| !attr
->form_is_block ())
13476 complaint (_("No DW_FORM_block* DW_AT_call_value for "
13477 "DW_TAG_call_site child DIE %s [in module %s]"),
13478 sect_offset_str (child_die
->sect_off
),
13479 objfile_name (objfile
));
13482 parameter
->value
= DW_BLOCK (attr
)->data
;
13483 parameter
->value_size
= DW_BLOCK (attr
)->size
;
13485 /* Parameters are not pre-cleared by memset above. */
13486 parameter
->data_value
= NULL
;
13487 parameter
->data_value_size
= 0;
13488 call_site
->parameter_count
++;
13490 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
13492 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
13493 if (attr
!= nullptr)
13495 if (!attr
->form_is_block ())
13496 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
13497 "DW_TAG_call_site child DIE %s [in module %s]"),
13498 sect_offset_str (child_die
->sect_off
),
13499 objfile_name (objfile
));
13502 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13503 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13509 /* Helper function for read_variable. If DIE represents a virtual
13510 table, then return the type of the concrete object that is
13511 associated with the virtual table. Otherwise, return NULL. */
13513 static struct type
*
13514 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13516 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13520 /* Find the type DIE. */
13521 struct die_info
*type_die
= NULL
;
13522 struct dwarf2_cu
*type_cu
= cu
;
13524 if (attr
->form_is_ref ())
13525 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13526 if (type_die
== NULL
)
13529 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13531 return die_containing_type (type_die
, type_cu
);
13534 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13537 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13539 struct rust_vtable_symbol
*storage
= NULL
;
13541 if (cu
->language
== language_rust
)
13543 struct type
*containing_type
= rust_containing_type (die
, cu
);
13545 if (containing_type
!= NULL
)
13547 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13549 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol ();
13550 initialize_objfile_symbol (storage
);
13551 storage
->concrete_type
= containing_type
;
13552 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13556 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
13557 struct attribute
*abstract_origin
13558 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13559 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
13560 if (res
== NULL
&& loc
&& abstract_origin
)
13562 /* We have a variable without a name, but with a location and an abstract
13563 origin. This may be a concrete instance of an abstract variable
13564 referenced from an DW_OP_GNU_variable_value, so save it to find it back
13566 struct dwarf2_cu
*origin_cu
= cu
;
13567 struct die_info
*origin_die
13568 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
13569 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
13570 dpo
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
13574 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13575 reading .debug_rnglists.
13576 Callback's type should be:
13577 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13578 Return true if the attributes are present and valid, otherwise,
13581 template <typename Callback
>
13583 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13584 Callback
&&callback
)
13586 struct dwarf2_per_objfile
*dwarf2_per_objfile
13587 = cu
->per_cu
->dwarf2_per_objfile
;
13588 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13589 bfd
*obfd
= objfile
->obfd
;
13590 /* Base address selection entry. */
13591 gdb::optional
<CORE_ADDR
> base
;
13592 const gdb_byte
*buffer
;
13593 CORE_ADDR baseaddr
;
13594 bool overflow
= false;
13596 base
= cu
->base_address
;
13598 dwarf2_per_objfile
->rnglists
.read (objfile
);
13599 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
13601 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13605 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
13607 baseaddr
= objfile
->text_section_offset ();
13611 /* Initialize it due to a false compiler warning. */
13612 CORE_ADDR range_beginning
= 0, range_end
= 0;
13613 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
13614 + dwarf2_per_objfile
->rnglists
.size
);
13615 unsigned int bytes_read
;
13617 if (buffer
== buf_end
)
13622 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13625 case DW_RLE_end_of_list
:
13627 case DW_RLE_base_address
:
13628 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13633 base
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13634 buffer
+= bytes_read
;
13636 case DW_RLE_start_length
:
13637 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13642 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13644 buffer
+= bytes_read
;
13645 range_end
= (range_beginning
13646 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13647 buffer
+= bytes_read
;
13648 if (buffer
> buf_end
)
13654 case DW_RLE_offset_pair
:
13655 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13656 buffer
+= bytes_read
;
13657 if (buffer
> buf_end
)
13662 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13663 buffer
+= bytes_read
;
13664 if (buffer
> buf_end
)
13670 case DW_RLE_start_end
:
13671 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13676 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13678 buffer
+= bytes_read
;
13679 range_end
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13680 buffer
+= bytes_read
;
13683 complaint (_("Invalid .debug_rnglists data (no base address)"));
13686 if (rlet
== DW_RLE_end_of_list
|| overflow
)
13688 if (rlet
== DW_RLE_base_address
)
13691 if (!base
.has_value ())
13693 /* We have no valid base address for the ranges
13695 complaint (_("Invalid .debug_rnglists data (no base address)"));
13699 if (range_beginning
> range_end
)
13701 /* Inverted range entries are invalid. */
13702 complaint (_("Invalid .debug_rnglists data (inverted range)"));
13706 /* Empty range entries have no effect. */
13707 if (range_beginning
== range_end
)
13710 range_beginning
+= *base
;
13711 range_end
+= *base
;
13713 /* A not-uncommon case of bad debug info.
13714 Don't pollute the addrmap with bad data. */
13715 if (range_beginning
+ baseaddr
== 0
13716 && !dwarf2_per_objfile
->has_section_at_zero
)
13718 complaint (_(".debug_rnglists entry has start address of zero"
13719 " [in module %s]"), objfile_name (objfile
));
13723 callback (range_beginning
, range_end
);
13728 complaint (_("Offset %d is not terminated "
13729 "for DW_AT_ranges attribute"),
13737 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
13738 Callback's type should be:
13739 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13740 Return 1 if the attributes are present and valid, otherwise, return 0. */
13742 template <typename Callback
>
13744 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
13745 Callback
&&callback
)
13747 struct dwarf2_per_objfile
*dwarf2_per_objfile
13748 = cu
->per_cu
->dwarf2_per_objfile
;
13749 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13750 struct comp_unit_head
*cu_header
= &cu
->header
;
13751 bfd
*obfd
= objfile
->obfd
;
13752 unsigned int addr_size
= cu_header
->addr_size
;
13753 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13754 /* Base address selection entry. */
13755 gdb::optional
<CORE_ADDR
> base
;
13756 unsigned int dummy
;
13757 const gdb_byte
*buffer
;
13758 CORE_ADDR baseaddr
;
13760 if (cu_header
->version
>= 5)
13761 return dwarf2_rnglists_process (offset
, cu
, callback
);
13763 base
= cu
->base_address
;
13765 dwarf2_per_objfile
->ranges
.read (objfile
);
13766 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
13768 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13772 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
13774 baseaddr
= objfile
->text_section_offset ();
13778 CORE_ADDR range_beginning
, range_end
;
13780 range_beginning
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13781 buffer
+= addr_size
;
13782 range_end
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13783 buffer
+= addr_size
;
13784 offset
+= 2 * addr_size
;
13786 /* An end of list marker is a pair of zero addresses. */
13787 if (range_beginning
== 0 && range_end
== 0)
13788 /* Found the end of list entry. */
13791 /* Each base address selection entry is a pair of 2 values.
13792 The first is the largest possible address, the second is
13793 the base address. Check for a base address here. */
13794 if ((range_beginning
& mask
) == mask
)
13796 /* If we found the largest possible address, then we already
13797 have the base address in range_end. */
13802 if (!base
.has_value ())
13804 /* We have no valid base address for the ranges
13806 complaint (_("Invalid .debug_ranges data (no base address)"));
13810 if (range_beginning
> range_end
)
13812 /* Inverted range entries are invalid. */
13813 complaint (_("Invalid .debug_ranges data (inverted range)"));
13817 /* Empty range entries have no effect. */
13818 if (range_beginning
== range_end
)
13821 range_beginning
+= *base
;
13822 range_end
+= *base
;
13824 /* A not-uncommon case of bad debug info.
13825 Don't pollute the addrmap with bad data. */
13826 if (range_beginning
+ baseaddr
== 0
13827 && !dwarf2_per_objfile
->has_section_at_zero
)
13829 complaint (_(".debug_ranges entry has start address of zero"
13830 " [in module %s]"), objfile_name (objfile
));
13834 callback (range_beginning
, range_end
);
13840 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
13841 Return 1 if the attributes are present and valid, otherwise, return 0.
13842 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
13845 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
13846 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
13847 dwarf2_psymtab
*ranges_pst
)
13849 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13850 struct gdbarch
*gdbarch
= objfile
->arch ();
13851 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
13854 CORE_ADDR high
= 0;
13857 retval
= dwarf2_ranges_process (offset
, cu
,
13858 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
13860 if (ranges_pst
!= NULL
)
13865 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13866 range_beginning
+ baseaddr
)
13868 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13869 range_end
+ baseaddr
)
13871 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
13872 lowpc
, highpc
- 1, ranges_pst
);
13875 /* FIXME: This is recording everything as a low-high
13876 segment of consecutive addresses. We should have a
13877 data structure for discontiguous block ranges
13881 low
= range_beginning
;
13887 if (range_beginning
< low
)
13888 low
= range_beginning
;
13889 if (range_end
> high
)
13897 /* If the first entry is an end-of-list marker, the range
13898 describes an empty scope, i.e. no instructions. */
13904 *high_return
= high
;
13908 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
13909 definition for the return value. *LOWPC and *HIGHPC are set iff
13910 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
13912 static enum pc_bounds_kind
13913 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
13914 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
13915 dwarf2_psymtab
*pst
)
13917 struct dwarf2_per_objfile
*dwarf2_per_objfile
13918 = cu
->per_cu
->dwarf2_per_objfile
;
13919 struct attribute
*attr
;
13920 struct attribute
*attr_high
;
13922 CORE_ADDR high
= 0;
13923 enum pc_bounds_kind ret
;
13925 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
13928 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13929 if (attr
!= nullptr)
13931 low
= attr
->value_as_address ();
13932 high
= attr_high
->value_as_address ();
13933 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
13937 /* Found high w/o low attribute. */
13938 return PC_BOUNDS_INVALID
;
13940 /* Found consecutive range of addresses. */
13941 ret
= PC_BOUNDS_HIGH_LOW
;
13945 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
13948 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
13949 We take advantage of the fact that DW_AT_ranges does not appear
13950 in DW_TAG_compile_unit of DWO files. */
13951 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
13952 unsigned int ranges_offset
= (DW_UNSND (attr
)
13953 + (need_ranges_base
13957 /* Value of the DW_AT_ranges attribute is the offset in the
13958 .debug_ranges section. */
13959 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
13960 return PC_BOUNDS_INVALID
;
13961 /* Found discontinuous range of addresses. */
13962 ret
= PC_BOUNDS_RANGES
;
13965 return PC_BOUNDS_NOT_PRESENT
;
13968 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
13970 return PC_BOUNDS_INVALID
;
13972 /* When using the GNU linker, .gnu.linkonce. sections are used to
13973 eliminate duplicate copies of functions and vtables and such.
13974 The linker will arbitrarily choose one and discard the others.
13975 The AT_*_pc values for such functions refer to local labels in
13976 these sections. If the section from that file was discarded, the
13977 labels are not in the output, so the relocs get a value of 0.
13978 If this is a discarded function, mark the pc bounds as invalid,
13979 so that GDB will ignore it. */
13980 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13981 return PC_BOUNDS_INVALID
;
13989 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
13990 its low and high PC addresses. Do nothing if these addresses could not
13991 be determined. Otherwise, set LOWPC to the low address if it is smaller,
13992 and HIGHPC to the high address if greater than HIGHPC. */
13995 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
13996 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13997 struct dwarf2_cu
*cu
)
13999 CORE_ADDR low
, high
;
14000 struct die_info
*child
= die
->child
;
14002 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14004 *lowpc
= std::min (*lowpc
, low
);
14005 *highpc
= std::max (*highpc
, high
);
14008 /* If the language does not allow nested subprograms (either inside
14009 subprograms or lexical blocks), we're done. */
14010 if (cu
->language
!= language_ada
)
14013 /* Check all the children of the given DIE. If it contains nested
14014 subprograms, then check their pc bounds. Likewise, we need to
14015 check lexical blocks as well, as they may also contain subprogram
14017 while (child
&& child
->tag
)
14019 if (child
->tag
== DW_TAG_subprogram
14020 || child
->tag
== DW_TAG_lexical_block
)
14021 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14022 child
= child
->sibling
;
14026 /* Get the low and high pc's represented by the scope DIE, and store
14027 them in *LOWPC and *HIGHPC. If the correct values can't be
14028 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14031 get_scope_pc_bounds (struct die_info
*die
,
14032 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14033 struct dwarf2_cu
*cu
)
14035 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14036 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14037 CORE_ADDR current_low
, current_high
;
14039 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14040 >= PC_BOUNDS_RANGES
)
14042 best_low
= current_low
;
14043 best_high
= current_high
;
14047 struct die_info
*child
= die
->child
;
14049 while (child
&& child
->tag
)
14051 switch (child
->tag
) {
14052 case DW_TAG_subprogram
:
14053 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14055 case DW_TAG_namespace
:
14056 case DW_TAG_module
:
14057 /* FIXME: carlton/2004-01-16: Should we do this for
14058 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14059 that current GCC's always emit the DIEs corresponding
14060 to definitions of methods of classes as children of a
14061 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14062 the DIEs giving the declarations, which could be
14063 anywhere). But I don't see any reason why the
14064 standards says that they have to be there. */
14065 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14067 if (current_low
!= ((CORE_ADDR
) -1))
14069 best_low
= std::min (best_low
, current_low
);
14070 best_high
= std::max (best_high
, current_high
);
14078 child
= child
->sibling
;
14083 *highpc
= best_high
;
14086 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14090 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14091 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14093 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14094 struct gdbarch
*gdbarch
= objfile
->arch ();
14095 struct attribute
*attr
;
14096 struct attribute
*attr_high
;
14098 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14101 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14102 if (attr
!= nullptr)
14104 CORE_ADDR low
= attr
->value_as_address ();
14105 CORE_ADDR high
= attr_high
->value_as_address ();
14107 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14110 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14111 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14112 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14116 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14117 if (attr
!= nullptr)
14119 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14120 We take advantage of the fact that DW_AT_ranges does not appear
14121 in DW_TAG_compile_unit of DWO files. */
14122 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14124 /* The value of the DW_AT_ranges attribute is the offset of the
14125 address range list in the .debug_ranges section. */
14126 unsigned long offset
= (DW_UNSND (attr
)
14127 + (need_ranges_base
? cu
->ranges_base
: 0));
14129 std::vector
<blockrange
> blockvec
;
14130 dwarf2_ranges_process (offset
, cu
,
14131 [&] (CORE_ADDR start
, CORE_ADDR end
)
14135 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14136 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14137 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14138 blockvec
.emplace_back (start
, end
);
14141 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14145 /* Check whether the producer field indicates either of GCC < 4.6, or the
14146 Intel C/C++ compiler, and cache the result in CU. */
14149 check_producer (struct dwarf2_cu
*cu
)
14153 if (cu
->producer
== NULL
)
14155 /* For unknown compilers expect their behavior is DWARF version
14158 GCC started to support .debug_types sections by -gdwarf-4 since
14159 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14160 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14161 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14162 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14164 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14166 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14167 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14169 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14171 cu
->producer_is_icc
= true;
14172 cu
->producer_is_icc_lt_14
= major
< 14;
14174 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14175 cu
->producer_is_codewarrior
= true;
14178 /* For other non-GCC compilers, expect their behavior is DWARF version
14182 cu
->checked_producer
= true;
14185 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14186 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14187 during 4.6.0 experimental. */
14190 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14192 if (!cu
->checked_producer
)
14193 check_producer (cu
);
14195 return cu
->producer_is_gxx_lt_4_6
;
14199 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14200 with incorrect is_stmt attributes. */
14203 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14205 if (!cu
->checked_producer
)
14206 check_producer (cu
);
14208 return cu
->producer_is_codewarrior
;
14211 /* Return the default accessibility type if it is not overridden by
14212 DW_AT_accessibility. */
14214 static enum dwarf_access_attribute
14215 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14217 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14219 /* The default DWARF 2 accessibility for members is public, the default
14220 accessibility for inheritance is private. */
14222 if (die
->tag
!= DW_TAG_inheritance
)
14223 return DW_ACCESS_public
;
14225 return DW_ACCESS_private
;
14229 /* DWARF 3+ defines the default accessibility a different way. The same
14230 rules apply now for DW_TAG_inheritance as for the members and it only
14231 depends on the container kind. */
14233 if (die
->parent
->tag
== DW_TAG_class_type
)
14234 return DW_ACCESS_private
;
14236 return DW_ACCESS_public
;
14240 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14241 offset. If the attribute was not found return 0, otherwise return
14242 1. If it was found but could not properly be handled, set *OFFSET
14246 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14249 struct attribute
*attr
;
14251 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14256 /* Note that we do not check for a section offset first here.
14257 This is because DW_AT_data_member_location is new in DWARF 4,
14258 so if we see it, we can assume that a constant form is really
14259 a constant and not a section offset. */
14260 if (attr
->form_is_constant ())
14261 *offset
= attr
->constant_value (0);
14262 else if (attr
->form_is_section_offset ())
14263 dwarf2_complex_location_expr_complaint ();
14264 else if (attr
->form_is_block ())
14265 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14267 dwarf2_complex_location_expr_complaint ();
14275 /* Look for DW_AT_data_member_location and store the results in FIELD. */
14278 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14279 struct field
*field
)
14281 struct attribute
*attr
;
14283 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14286 if (attr
->form_is_constant ())
14288 LONGEST offset
= attr
->constant_value (0);
14289 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14291 else if (attr
->form_is_section_offset ())
14292 dwarf2_complex_location_expr_complaint ();
14293 else if (attr
->form_is_block ())
14296 CORE_ADDR offset
= decode_locdesc (DW_BLOCK (attr
), cu
, &handled
);
14298 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14301 struct objfile
*objfile
14302 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14303 struct dwarf2_locexpr_baton
*dlbaton
14304 = XOBNEW (&objfile
->objfile_obstack
,
14305 struct dwarf2_locexpr_baton
);
14306 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14307 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14308 /* When using this baton, we want to compute the address
14309 of the field, not the value. This is why
14310 is_reference is set to false here. */
14311 dlbaton
->is_reference
= false;
14312 dlbaton
->per_cu
= cu
->per_cu
;
14314 SET_FIELD_DWARF_BLOCK (*field
, dlbaton
);
14318 dwarf2_complex_location_expr_complaint ();
14322 /* Add an aggregate field to the field list. */
14325 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14326 struct dwarf2_cu
*cu
)
14328 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14329 struct gdbarch
*gdbarch
= objfile
->arch ();
14330 struct nextfield
*new_field
;
14331 struct attribute
*attr
;
14333 const char *fieldname
= "";
14335 if (die
->tag
== DW_TAG_inheritance
)
14337 fip
->baseclasses
.emplace_back ();
14338 new_field
= &fip
->baseclasses
.back ();
14342 fip
->fields
.emplace_back ();
14343 new_field
= &fip
->fields
.back ();
14346 new_field
->offset
= die
->sect_off
;
14348 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14349 if (attr
!= nullptr)
14350 new_field
->accessibility
= DW_UNSND (attr
);
14352 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14353 if (new_field
->accessibility
!= DW_ACCESS_public
)
14354 fip
->non_public_fields
= 1;
14356 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14357 if (attr
!= nullptr)
14358 new_field
->virtuality
= DW_UNSND (attr
);
14360 new_field
->virtuality
= DW_VIRTUALITY_none
;
14362 fp
= &new_field
->field
;
14364 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14366 /* Data member other than a C++ static data member. */
14368 /* Get type of field. */
14369 fp
->type
= die_type (die
, cu
);
14371 SET_FIELD_BITPOS (*fp
, 0);
14373 /* Get bit size of field (zero if none). */
14374 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14375 if (attr
!= nullptr)
14377 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14381 FIELD_BITSIZE (*fp
) = 0;
14384 /* Get bit offset of field. */
14385 handle_data_member_location (die
, cu
, fp
);
14386 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14387 if (attr
!= nullptr)
14389 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
14391 /* For big endian bits, the DW_AT_bit_offset gives the
14392 additional bit offset from the MSB of the containing
14393 anonymous object to the MSB of the field. We don't
14394 have to do anything special since we don't need to
14395 know the size of the anonymous object. */
14396 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14400 /* For little endian bits, compute the bit offset to the
14401 MSB of the anonymous object, subtract off the number of
14402 bits from the MSB of the field to the MSB of the
14403 object, and then subtract off the number of bits of
14404 the field itself. The result is the bit offset of
14405 the LSB of the field. */
14406 int anonymous_size
;
14407 int bit_offset
= DW_UNSND (attr
);
14409 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14410 if (attr
!= nullptr)
14412 /* The size of the anonymous object containing
14413 the bit field is explicit, so use the
14414 indicated size (in bytes). */
14415 anonymous_size
= DW_UNSND (attr
);
14419 /* The size of the anonymous object containing
14420 the bit field must be inferred from the type
14421 attribute of the data member containing the
14423 anonymous_size
= TYPE_LENGTH (fp
->type
);
14425 SET_FIELD_BITPOS (*fp
,
14426 (FIELD_BITPOS (*fp
)
14427 + anonymous_size
* bits_per_byte
14428 - bit_offset
- FIELD_BITSIZE (*fp
)));
14431 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14433 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14434 + attr
->constant_value (0)));
14436 /* Get name of field. */
14437 fieldname
= dwarf2_name (die
, cu
);
14438 if (fieldname
== NULL
)
14441 /* The name is already allocated along with this objfile, so we don't
14442 need to duplicate it for the type. */
14443 fp
->name
= fieldname
;
14445 /* Change accessibility for artificial fields (e.g. virtual table
14446 pointer or virtual base class pointer) to private. */
14447 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14449 FIELD_ARTIFICIAL (*fp
) = 1;
14450 new_field
->accessibility
= DW_ACCESS_private
;
14451 fip
->non_public_fields
= 1;
14454 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14456 /* C++ static member. */
14458 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14459 is a declaration, but all versions of G++ as of this writing
14460 (so through at least 3.2.1) incorrectly generate
14461 DW_TAG_variable tags. */
14463 const char *physname
;
14465 /* Get name of field. */
14466 fieldname
= dwarf2_name (die
, cu
);
14467 if (fieldname
== NULL
)
14470 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14472 /* Only create a symbol if this is an external value.
14473 new_symbol checks this and puts the value in the global symbol
14474 table, which we want. If it is not external, new_symbol
14475 will try to put the value in cu->list_in_scope which is wrong. */
14476 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
14478 /* A static const member, not much different than an enum as far as
14479 we're concerned, except that we can support more types. */
14480 new_symbol (die
, NULL
, cu
);
14483 /* Get physical name. */
14484 physname
= dwarf2_physname (fieldname
, die
, cu
);
14486 /* The name is already allocated along with this objfile, so we don't
14487 need to duplicate it for the type. */
14488 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
14489 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14490 FIELD_NAME (*fp
) = fieldname
;
14492 else if (die
->tag
== DW_TAG_inheritance
)
14494 /* C++ base class field. */
14495 handle_data_member_location (die
, cu
, fp
);
14496 FIELD_BITSIZE (*fp
) = 0;
14497 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14498 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
14501 gdb_assert_not_reached ("missing case in dwarf2_add_field");
14504 /* Can the type given by DIE define another type? */
14507 type_can_define_types (const struct die_info
*die
)
14511 case DW_TAG_typedef
:
14512 case DW_TAG_class_type
:
14513 case DW_TAG_structure_type
:
14514 case DW_TAG_union_type
:
14515 case DW_TAG_enumeration_type
:
14523 /* Add a type definition defined in the scope of the FIP's class. */
14526 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
14527 struct dwarf2_cu
*cu
)
14529 struct decl_field fp
;
14530 memset (&fp
, 0, sizeof (fp
));
14532 gdb_assert (type_can_define_types (die
));
14534 /* Get name of field. NULL is okay here, meaning an anonymous type. */
14535 fp
.name
= dwarf2_name (die
, cu
);
14536 fp
.type
= read_type_die (die
, cu
);
14538 /* Save accessibility. */
14539 enum dwarf_access_attribute accessibility
;
14540 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14542 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14544 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14545 switch (accessibility
)
14547 case DW_ACCESS_public
:
14548 /* The assumed value if neither private nor protected. */
14550 case DW_ACCESS_private
:
14553 case DW_ACCESS_protected
:
14554 fp
.is_protected
= 1;
14557 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14560 if (die
->tag
== DW_TAG_typedef
)
14561 fip
->typedef_field_list
.push_back (fp
);
14563 fip
->nested_types_list
.push_back (fp
);
14566 /* A convenience typedef that's used when finding the discriminant
14567 field for a variant part. */
14568 typedef std::unordered_map
<sect_offset
, int, gdb::hash_enum
<sect_offset
>>
14571 /* Compute the discriminant range for a given variant. OBSTACK is
14572 where the results will be stored. VARIANT is the variant to
14573 process. IS_UNSIGNED indicates whether the discriminant is signed
14576 static const gdb::array_view
<discriminant_range
>
14577 convert_variant_range (struct obstack
*obstack
, const variant_field
&variant
,
14580 std::vector
<discriminant_range
> ranges
;
14582 if (variant
.default_branch
)
14585 if (variant
.discr_list_data
== nullptr)
14587 discriminant_range r
14588 = {variant
.discriminant_value
, variant
.discriminant_value
};
14589 ranges
.push_back (r
);
14593 gdb::array_view
<const gdb_byte
> data (variant
.discr_list_data
->data
,
14594 variant
.discr_list_data
->size
);
14595 while (!data
.empty ())
14597 if (data
[0] != DW_DSC_range
&& data
[0] != DW_DSC_label
)
14599 complaint (_("invalid discriminant marker: %d"), data
[0]);
14602 bool is_range
= data
[0] == DW_DSC_range
;
14603 data
= data
.slice (1);
14605 ULONGEST low
, high
;
14606 unsigned int bytes_read
;
14610 complaint (_("DW_AT_discr_list missing low value"));
14614 low
= read_unsigned_leb128 (nullptr, data
.data (), &bytes_read
);
14616 low
= (ULONGEST
) read_signed_leb128 (nullptr, data
.data (),
14618 data
= data
.slice (bytes_read
);
14624 complaint (_("DW_AT_discr_list missing high value"));
14628 high
= read_unsigned_leb128 (nullptr, data
.data (),
14631 high
= (LONGEST
) read_signed_leb128 (nullptr, data
.data (),
14633 data
= data
.slice (bytes_read
);
14638 ranges
.push_back ({ low
, high
});
14642 discriminant_range
*result
= XOBNEWVEC (obstack
, discriminant_range
,
14644 std::copy (ranges
.begin (), ranges
.end (), result
);
14645 return gdb::array_view
<discriminant_range
> (result
, ranges
.size ());
14648 static const gdb::array_view
<variant_part
> create_variant_parts
14649 (struct obstack
*obstack
,
14650 const offset_map_type
&offset_map
,
14651 struct field_info
*fi
,
14652 const std::vector
<variant_part_builder
> &variant_parts
);
14654 /* Fill in a "struct variant" for a given variant field. RESULT is
14655 the variant to fill in. OBSTACK is where any needed allocations
14656 will be done. OFFSET_MAP holds the mapping from section offsets to
14657 fields for the type. FI describes the fields of the type we're
14658 processing. FIELD is the variant field we're converting. */
14661 create_one_variant (variant
&result
, struct obstack
*obstack
,
14662 const offset_map_type
&offset_map
,
14663 struct field_info
*fi
, const variant_field
&field
)
14665 result
.discriminants
= convert_variant_range (obstack
, field
, false);
14666 result
.first_field
= field
.first_field
+ fi
->baseclasses
.size ();
14667 result
.last_field
= field
.last_field
+ fi
->baseclasses
.size ();
14668 result
.parts
= create_variant_parts (obstack
, offset_map
, fi
,
14669 field
.variant_parts
);
14672 /* Fill in a "struct variant_part" for a given variant part. RESULT
14673 is the variant part to fill in. OBSTACK is where any needed
14674 allocations will be done. OFFSET_MAP holds the mapping from
14675 section offsets to fields for the type. FI describes the fields of
14676 the type we're processing. BUILDER is the variant part to be
14680 create_one_variant_part (variant_part
&result
,
14681 struct obstack
*obstack
,
14682 const offset_map_type
&offset_map
,
14683 struct field_info
*fi
,
14684 const variant_part_builder
&builder
)
14686 auto iter
= offset_map
.find (builder
.discriminant_offset
);
14687 if (iter
== offset_map
.end ())
14689 result
.discriminant_index
= -1;
14690 /* Doesn't matter. */
14691 result
.is_unsigned
= false;
14695 result
.discriminant_index
= iter
->second
;
14697 = TYPE_UNSIGNED (FIELD_TYPE
14698 (fi
->fields
[result
.discriminant_index
].field
));
14701 size_t n
= builder
.variants
.size ();
14702 variant
*output
= new (obstack
) variant
[n
];
14703 for (size_t i
= 0; i
< n
; ++i
)
14704 create_one_variant (output
[i
], obstack
, offset_map
, fi
,
14705 builder
.variants
[i
]);
14707 result
.variants
= gdb::array_view
<variant
> (output
, n
);
14710 /* Create a vector of variant parts that can be attached to a type.
14711 OBSTACK is where any needed allocations will be done. OFFSET_MAP
14712 holds the mapping from section offsets to fields for the type. FI
14713 describes the fields of the type we're processing. VARIANT_PARTS
14714 is the vector to convert. */
14716 static const gdb::array_view
<variant_part
>
14717 create_variant_parts (struct obstack
*obstack
,
14718 const offset_map_type
&offset_map
,
14719 struct field_info
*fi
,
14720 const std::vector
<variant_part_builder
> &variant_parts
)
14722 if (variant_parts
.empty ())
14725 size_t n
= variant_parts
.size ();
14726 variant_part
*result
= new (obstack
) variant_part
[n
];
14727 for (size_t i
= 0; i
< n
; ++i
)
14728 create_one_variant_part (result
[i
], obstack
, offset_map
, fi
,
14731 return gdb::array_view
<variant_part
> (result
, n
);
14734 /* Compute the variant part vector for FIP, attaching it to TYPE when
14738 add_variant_property (struct field_info
*fip
, struct type
*type
,
14739 struct dwarf2_cu
*cu
)
14741 /* Map section offsets of fields to their field index. Note the
14742 field index here does not take the number of baseclasses into
14744 offset_map_type offset_map
;
14745 for (int i
= 0; i
< fip
->fields
.size (); ++i
)
14746 offset_map
[fip
->fields
[i
].offset
] = i
;
14748 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14749 gdb::array_view
<variant_part
> parts
14750 = create_variant_parts (&objfile
->objfile_obstack
, offset_map
, fip
,
14751 fip
->variant_parts
);
14753 struct dynamic_prop prop
;
14754 prop
.kind
= PROP_VARIANT_PARTS
;
14755 prop
.data
.variant_parts
14756 = ((gdb::array_view
<variant_part
> *)
14757 obstack_copy (&objfile
->objfile_obstack
, &parts
, sizeof (parts
)));
14759 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
14762 /* Create the vector of fields, and attach it to the type. */
14765 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14766 struct dwarf2_cu
*cu
)
14768 int nfields
= fip
->nfields ();
14770 /* Record the field count, allocate space for the array of fields,
14771 and create blank accessibility bitfields if necessary. */
14772 TYPE_NFIELDS (type
) = nfields
;
14773 TYPE_FIELDS (type
) = (struct field
*)
14774 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
14776 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14778 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14780 TYPE_FIELD_PRIVATE_BITS (type
) =
14781 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14782 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14784 TYPE_FIELD_PROTECTED_BITS (type
) =
14785 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14786 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14788 TYPE_FIELD_IGNORE_BITS (type
) =
14789 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14790 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14793 /* If the type has baseclasses, allocate and clear a bit vector for
14794 TYPE_FIELD_VIRTUAL_BITS. */
14795 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
14797 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
14798 unsigned char *pointer
;
14800 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14801 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14802 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14803 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
14804 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
14807 if (!fip
->variant_parts
.empty ())
14808 add_variant_property (fip
, type
, cu
);
14810 /* Copy the saved-up fields into the field vector. */
14811 for (int i
= 0; i
< nfields
; ++i
)
14813 struct nextfield
&field
14814 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
14815 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
14817 TYPE_FIELD (type
, i
) = field
.field
;
14818 switch (field
.accessibility
)
14820 case DW_ACCESS_private
:
14821 if (cu
->language
!= language_ada
)
14822 SET_TYPE_FIELD_PRIVATE (type
, i
);
14825 case DW_ACCESS_protected
:
14826 if (cu
->language
!= language_ada
)
14827 SET_TYPE_FIELD_PROTECTED (type
, i
);
14830 case DW_ACCESS_public
:
14834 /* Unknown accessibility. Complain and treat it as public. */
14836 complaint (_("unsupported accessibility %d"),
14837 field
.accessibility
);
14841 if (i
< fip
->baseclasses
.size ())
14843 switch (field
.virtuality
)
14845 case DW_VIRTUALITY_virtual
:
14846 case DW_VIRTUALITY_pure_virtual
:
14847 if (cu
->language
== language_ada
)
14848 error (_("unexpected virtuality in component of Ada type"));
14849 SET_TYPE_FIELD_VIRTUAL (type
, i
);
14856 /* Return true if this member function is a constructor, false
14860 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14862 const char *fieldname
;
14863 const char *type_name
;
14866 if (die
->parent
== NULL
)
14869 if (die
->parent
->tag
!= DW_TAG_structure_type
14870 && die
->parent
->tag
!= DW_TAG_union_type
14871 && die
->parent
->tag
!= DW_TAG_class_type
)
14874 fieldname
= dwarf2_name (die
, cu
);
14875 type_name
= dwarf2_name (die
->parent
, cu
);
14876 if (fieldname
== NULL
|| type_name
== NULL
)
14879 len
= strlen (fieldname
);
14880 return (strncmp (fieldname
, type_name
, len
) == 0
14881 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
14884 /* Check if the given VALUE is a recognized enum
14885 dwarf_defaulted_attribute constant according to DWARF5 spec,
14889 is_valid_DW_AT_defaulted (ULONGEST value
)
14893 case DW_DEFAULTED_no
:
14894 case DW_DEFAULTED_in_class
:
14895 case DW_DEFAULTED_out_of_class
:
14899 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
14903 /* Add a member function to the proper fieldlist. */
14906 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
14907 struct type
*type
, struct dwarf2_cu
*cu
)
14909 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14910 struct attribute
*attr
;
14912 struct fnfieldlist
*flp
= nullptr;
14913 struct fn_field
*fnp
;
14914 const char *fieldname
;
14915 struct type
*this_type
;
14916 enum dwarf_access_attribute accessibility
;
14918 if (cu
->language
== language_ada
)
14919 error (_("unexpected member function in Ada type"));
14921 /* Get name of member function. */
14922 fieldname
= dwarf2_name (die
, cu
);
14923 if (fieldname
== NULL
)
14926 /* Look up member function name in fieldlist. */
14927 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
14929 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
14931 flp
= &fip
->fnfieldlists
[i
];
14936 /* Create a new fnfieldlist if necessary. */
14937 if (flp
== nullptr)
14939 fip
->fnfieldlists
.emplace_back ();
14940 flp
= &fip
->fnfieldlists
.back ();
14941 flp
->name
= fieldname
;
14942 i
= fip
->fnfieldlists
.size () - 1;
14945 /* Create a new member function field and add it to the vector of
14947 flp
->fnfields
.emplace_back ();
14948 fnp
= &flp
->fnfields
.back ();
14950 /* Delay processing of the physname until later. */
14951 if (cu
->language
== language_cplus
)
14952 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
14956 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
14957 fnp
->physname
= physname
? physname
: "";
14960 fnp
->type
= alloc_type (objfile
);
14961 this_type
= read_type_die (die
, cu
);
14962 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
14964 int nparams
= TYPE_NFIELDS (this_type
);
14966 /* TYPE is the domain of this method, and THIS_TYPE is the type
14967 of the method itself (TYPE_CODE_METHOD). */
14968 smash_to_method_type (fnp
->type
, type
,
14969 TYPE_TARGET_TYPE (this_type
),
14970 TYPE_FIELDS (this_type
),
14971 TYPE_NFIELDS (this_type
),
14972 TYPE_VARARGS (this_type
));
14974 /* Handle static member functions.
14975 Dwarf2 has no clean way to discern C++ static and non-static
14976 member functions. G++ helps GDB by marking the first
14977 parameter for non-static member functions (which is the this
14978 pointer) as artificial. We obtain this information from
14979 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
14980 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
14981 fnp
->voffset
= VOFFSET_STATIC
;
14984 complaint (_("member function type missing for '%s'"),
14985 dwarf2_full_name (fieldname
, die
, cu
));
14987 /* Get fcontext from DW_AT_containing_type if present. */
14988 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
14989 fnp
->fcontext
= die_containing_type (die
, cu
);
14991 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
14992 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
14994 /* Get accessibility. */
14995 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14996 if (attr
!= nullptr)
14997 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14999 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15000 switch (accessibility
)
15002 case DW_ACCESS_private
:
15003 fnp
->is_private
= 1;
15005 case DW_ACCESS_protected
:
15006 fnp
->is_protected
= 1;
15010 /* Check for artificial methods. */
15011 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15012 if (attr
&& DW_UNSND (attr
) != 0)
15013 fnp
->is_artificial
= 1;
15015 /* Check for defaulted methods. */
15016 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
15017 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
15018 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
15020 /* Check for deleted methods. */
15021 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
15022 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
15023 fnp
->is_deleted
= 1;
15025 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15027 /* Get index in virtual function table if it is a virtual member
15028 function. For older versions of GCC, this is an offset in the
15029 appropriate virtual table, as specified by DW_AT_containing_type.
15030 For everyone else, it is an expression to be evaluated relative
15031 to the object address. */
15033 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15034 if (attr
!= nullptr)
15036 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
> 0)
15038 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15040 /* Old-style GCC. */
15041 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15043 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15044 || (DW_BLOCK (attr
)->size
> 1
15045 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15046 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15048 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15049 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15050 dwarf2_complex_location_expr_complaint ();
15052 fnp
->voffset
/= cu
->header
.addr_size
;
15056 dwarf2_complex_location_expr_complaint ();
15058 if (!fnp
->fcontext
)
15060 /* If there is no `this' field and no DW_AT_containing_type,
15061 we cannot actually find a base class context for the
15063 if (TYPE_NFIELDS (this_type
) == 0
15064 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15066 complaint (_("cannot determine context for virtual member "
15067 "function \"%s\" (offset %s)"),
15068 fieldname
, sect_offset_str (die
->sect_off
));
15073 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15077 else if (attr
->form_is_section_offset ())
15079 dwarf2_complex_location_expr_complaint ();
15083 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15089 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15090 if (attr
&& DW_UNSND (attr
))
15092 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15093 complaint (_("Member function \"%s\" (offset %s) is virtual "
15094 "but the vtable offset is not specified"),
15095 fieldname
, sect_offset_str (die
->sect_off
));
15096 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15097 TYPE_CPLUS_DYNAMIC (type
) = 1;
15102 /* Create the vector of member function fields, and attach it to the type. */
15105 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15106 struct dwarf2_cu
*cu
)
15108 if (cu
->language
== language_ada
)
15109 error (_("unexpected member functions in Ada type"));
15111 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15112 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15114 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15116 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15118 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15119 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15121 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15122 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15123 fn_flp
->fn_fields
= (struct fn_field
*)
15124 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15126 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15127 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15130 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15133 /* Returns non-zero if NAME is the name of a vtable member in CU's
15134 language, zero otherwise. */
15136 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15138 static const char vptr
[] = "_vptr";
15140 /* Look for the C++ form of the vtable. */
15141 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15147 /* GCC outputs unnamed structures that are really pointers to member
15148 functions, with the ABI-specified layout. If TYPE describes
15149 such a structure, smash it into a member function type.
15151 GCC shouldn't do this; it should just output pointer to member DIEs.
15152 This is GCC PR debug/28767. */
15155 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15157 struct type
*pfn_type
, *self_type
, *new_type
;
15159 /* Check for a structure with no name and two children. */
15160 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15163 /* Check for __pfn and __delta members. */
15164 if (TYPE_FIELD_NAME (type
, 0) == NULL
15165 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15166 || TYPE_FIELD_NAME (type
, 1) == NULL
15167 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15170 /* Find the type of the method. */
15171 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15172 if (pfn_type
== NULL
15173 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15174 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15177 /* Look for the "this" argument. */
15178 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15179 if (TYPE_NFIELDS (pfn_type
) == 0
15180 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15181 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15184 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15185 new_type
= alloc_type (objfile
);
15186 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15187 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15188 TYPE_VARARGS (pfn_type
));
15189 smash_to_methodptr_type (type
, new_type
);
15192 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15193 appropriate error checking and issuing complaints if there is a
15197 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15199 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15201 if (attr
== nullptr)
15204 if (!attr
->form_is_constant ())
15206 complaint (_("DW_AT_alignment must have constant form"
15207 " - DIE at %s [in module %s]"),
15208 sect_offset_str (die
->sect_off
),
15209 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15214 if (attr
->form
== DW_FORM_sdata
)
15216 LONGEST val
= DW_SND (attr
);
15219 complaint (_("DW_AT_alignment value must not be negative"
15220 " - DIE at %s [in module %s]"),
15221 sect_offset_str (die
->sect_off
),
15222 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15228 align
= DW_UNSND (attr
);
15232 complaint (_("DW_AT_alignment value must not be zero"
15233 " - DIE at %s [in module %s]"),
15234 sect_offset_str (die
->sect_off
),
15235 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15238 if ((align
& (align
- 1)) != 0)
15240 complaint (_("DW_AT_alignment value must be a power of 2"
15241 " - DIE at %s [in module %s]"),
15242 sect_offset_str (die
->sect_off
),
15243 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15250 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15251 the alignment for TYPE. */
15254 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15257 if (!set_type_align (type
, get_alignment (cu
, die
)))
15258 complaint (_("DW_AT_alignment value too large"
15259 " - DIE at %s [in module %s]"),
15260 sect_offset_str (die
->sect_off
),
15261 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15264 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15265 constant for a type, according to DWARF5 spec, Table 5.5. */
15268 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
15273 case DW_CC_pass_by_reference
:
15274 case DW_CC_pass_by_value
:
15278 complaint (_("unrecognized DW_AT_calling_convention value "
15279 "(%s) for a type"), pulongest (value
));
15284 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15285 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
15286 also according to GNU-specific values (see include/dwarf2.h). */
15289 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15294 case DW_CC_program
:
15298 case DW_CC_GNU_renesas_sh
:
15299 case DW_CC_GNU_borland_fastcall_i386
:
15300 case DW_CC_GDB_IBM_OpenCL
:
15304 complaint (_("unrecognized DW_AT_calling_convention value "
15305 "(%s) for a subroutine"), pulongest (value
));
15310 /* Called when we find the DIE that starts a structure or union scope
15311 (definition) to create a type for the structure or union. Fill in
15312 the type's name and general properties; the members will not be
15313 processed until process_structure_scope. A symbol table entry for
15314 the type will also not be done until process_structure_scope (assuming
15315 the type has a name).
15317 NOTE: we need to call these functions regardless of whether or not the
15318 DIE has a DW_AT_name attribute, since it might be an anonymous
15319 structure or union. This gets the type entered into our set of
15320 user defined types. */
15322 static struct type
*
15323 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15325 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15327 struct attribute
*attr
;
15330 /* If the definition of this type lives in .debug_types, read that type.
15331 Don't follow DW_AT_specification though, that will take us back up
15332 the chain and we want to go down. */
15333 attr
= die
->attr (DW_AT_signature
);
15334 if (attr
!= nullptr)
15336 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15338 /* The type's CU may not be the same as CU.
15339 Ensure TYPE is recorded with CU in die_type_hash. */
15340 return set_die_type (die
, type
, cu
);
15343 type
= alloc_type (objfile
);
15344 INIT_CPLUS_SPECIFIC (type
);
15346 name
= dwarf2_name (die
, cu
);
15349 if (cu
->language
== language_cplus
15350 || cu
->language
== language_d
15351 || cu
->language
== language_rust
)
15353 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15355 /* dwarf2_full_name might have already finished building the DIE's
15356 type. If so, there is no need to continue. */
15357 if (get_die_type (die
, cu
) != NULL
)
15358 return get_die_type (die
, cu
);
15360 TYPE_NAME (type
) = full_name
;
15364 /* The name is already allocated along with this objfile, so
15365 we don't need to duplicate it for the type. */
15366 TYPE_NAME (type
) = name
;
15370 if (die
->tag
== DW_TAG_structure_type
)
15372 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15374 else if (die
->tag
== DW_TAG_union_type
)
15376 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15380 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15383 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15384 TYPE_DECLARED_CLASS (type
) = 1;
15386 /* Store the calling convention in the type if it's available in
15387 the die. Otherwise the calling convention remains set to
15388 the default value DW_CC_normal. */
15389 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15390 if (attr
!= nullptr
15391 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
15393 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15394 TYPE_CPLUS_CALLING_CONVENTION (type
)
15395 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
15398 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15399 if (attr
!= nullptr)
15401 if (attr
->form_is_constant ())
15402 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15405 struct dynamic_prop prop
;
15406 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
15407 cu
->per_cu
->addr_type ()))
15408 type
->add_dyn_prop (DYN_PROP_BYTE_SIZE
, prop
);
15409 TYPE_LENGTH (type
) = 0;
15414 TYPE_LENGTH (type
) = 0;
15417 maybe_set_alignment (cu
, die
, type
);
15419 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15421 /* ICC<14 does not output the required DW_AT_declaration on
15422 incomplete types, but gives them a size of zero. */
15423 TYPE_STUB (type
) = 1;
15426 TYPE_STUB_SUPPORTED (type
) = 1;
15428 if (die_is_declaration (die
, cu
))
15429 TYPE_STUB (type
) = 1;
15430 else if (attr
== NULL
&& die
->child
== NULL
15431 && producer_is_realview (cu
->producer
))
15432 /* RealView does not output the required DW_AT_declaration
15433 on incomplete types. */
15434 TYPE_STUB (type
) = 1;
15436 /* We need to add the type field to the die immediately so we don't
15437 infinitely recurse when dealing with pointers to the structure
15438 type within the structure itself. */
15439 set_die_type (die
, type
, cu
);
15441 /* set_die_type should be already done. */
15442 set_descriptive_type (type
, die
, cu
);
15447 static void handle_struct_member_die
15448 (struct die_info
*child_die
,
15450 struct field_info
*fi
,
15451 std::vector
<struct symbol
*> *template_args
,
15452 struct dwarf2_cu
*cu
);
15454 /* A helper for handle_struct_member_die that handles
15455 DW_TAG_variant_part. */
15458 handle_variant_part (struct die_info
*die
, struct type
*type
,
15459 struct field_info
*fi
,
15460 std::vector
<struct symbol
*> *template_args
,
15461 struct dwarf2_cu
*cu
)
15463 variant_part_builder
*new_part
;
15464 if (fi
->current_variant_part
== nullptr)
15466 fi
->variant_parts
.emplace_back ();
15467 new_part
= &fi
->variant_parts
.back ();
15469 else if (!fi
->current_variant_part
->processing_variant
)
15471 complaint (_("nested DW_TAG_variant_part seen "
15472 "- DIE at %s [in module %s]"),
15473 sect_offset_str (die
->sect_off
),
15474 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15479 variant_field
¤t
= fi
->current_variant_part
->variants
.back ();
15480 current
.variant_parts
.emplace_back ();
15481 new_part
= ¤t
.variant_parts
.back ();
15484 /* When we recurse, we want callees to add to this new variant
15486 scoped_restore save_current_variant_part
15487 = make_scoped_restore (&fi
->current_variant_part
, new_part
);
15489 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15492 /* It's a univariant form, an extension we support. */
15494 else if (discr
->form_is_ref ())
15496 struct dwarf2_cu
*target_cu
= cu
;
15497 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15499 new_part
->discriminant_offset
= target_die
->sect_off
;
15503 complaint (_("DW_AT_discr does not have DIE reference form"
15504 " - DIE at %s [in module %s]"),
15505 sect_offset_str (die
->sect_off
),
15506 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15509 for (die_info
*child_die
= die
->child
;
15511 child_die
= child_die
->sibling
)
15512 handle_struct_member_die (child_die
, type
, fi
, template_args
, cu
);
15515 /* A helper for handle_struct_member_die that handles
15519 handle_variant (struct die_info
*die
, struct type
*type
,
15520 struct field_info
*fi
,
15521 std::vector
<struct symbol
*> *template_args
,
15522 struct dwarf2_cu
*cu
)
15524 if (fi
->current_variant_part
== nullptr)
15526 complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part "
15527 "- DIE at %s [in module %s]"),
15528 sect_offset_str (die
->sect_off
),
15529 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15532 if (fi
->current_variant_part
->processing_variant
)
15534 complaint (_("nested DW_TAG_variant seen "
15535 "- DIE at %s [in module %s]"),
15536 sect_offset_str (die
->sect_off
),
15537 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15541 scoped_restore save_processing_variant
15542 = make_scoped_restore (&fi
->current_variant_part
->processing_variant
,
15545 fi
->current_variant_part
->variants
.emplace_back ();
15546 variant_field
&variant
= fi
->current_variant_part
->variants
.back ();
15547 variant
.first_field
= fi
->fields
.size ();
15549 /* In a variant we want to get the discriminant and also add a
15550 field for our sole member child. */
15551 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr_value
, cu
);
15552 if (discr
== nullptr)
15554 discr
= dwarf2_attr (die
, DW_AT_discr_list
, cu
);
15555 if (discr
== nullptr || DW_BLOCK (discr
)->size
== 0)
15556 variant
.default_branch
= true;
15558 variant
.discr_list_data
= DW_BLOCK (discr
);
15561 variant
.discriminant_value
= DW_UNSND (discr
);
15563 for (die_info
*variant_child
= die
->child
;
15564 variant_child
!= NULL
;
15565 variant_child
= variant_child
->sibling
)
15566 handle_struct_member_die (variant_child
, type
, fi
, template_args
, cu
);
15568 variant
.last_field
= fi
->fields
.size ();
15571 /* A helper for process_structure_scope that handles a single member
15575 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15576 struct field_info
*fi
,
15577 std::vector
<struct symbol
*> *template_args
,
15578 struct dwarf2_cu
*cu
)
15580 if (child_die
->tag
== DW_TAG_member
15581 || child_die
->tag
== DW_TAG_variable
)
15583 /* NOTE: carlton/2002-11-05: A C++ static data member
15584 should be a DW_TAG_member that is a declaration, but
15585 all versions of G++ as of this writing (so through at
15586 least 3.2.1) incorrectly generate DW_TAG_variable
15587 tags for them instead. */
15588 dwarf2_add_field (fi
, child_die
, cu
);
15590 else if (child_die
->tag
== DW_TAG_subprogram
)
15592 /* Rust doesn't have member functions in the C++ sense.
15593 However, it does emit ordinary functions as children
15594 of a struct DIE. */
15595 if (cu
->language
== language_rust
)
15596 read_func_scope (child_die
, cu
);
15599 /* C++ member function. */
15600 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15603 else if (child_die
->tag
== DW_TAG_inheritance
)
15605 /* C++ base class field. */
15606 dwarf2_add_field (fi
, child_die
, cu
);
15608 else if (type_can_define_types (child_die
))
15609 dwarf2_add_type_defn (fi
, child_die
, cu
);
15610 else if (child_die
->tag
== DW_TAG_template_type_param
15611 || child_die
->tag
== DW_TAG_template_value_param
)
15613 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15616 template_args
->push_back (arg
);
15618 else if (child_die
->tag
== DW_TAG_variant_part
)
15619 handle_variant_part (child_die
, type
, fi
, template_args
, cu
);
15620 else if (child_die
->tag
== DW_TAG_variant
)
15621 handle_variant (child_die
, type
, fi
, template_args
, cu
);
15624 /* Finish creating a structure or union type, including filling in
15625 its members and creating a symbol for it. */
15628 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15630 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15631 struct die_info
*child_die
;
15634 type
= get_die_type (die
, cu
);
15636 type
= read_structure_type (die
, cu
);
15638 bool has_template_parameters
= false;
15639 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15641 struct field_info fi
;
15642 std::vector
<struct symbol
*> template_args
;
15644 child_die
= die
->child
;
15646 while (child_die
&& child_die
->tag
)
15648 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15649 child_die
= child_die
->sibling
;
15652 /* Attach template arguments to type. */
15653 if (!template_args
.empty ())
15655 has_template_parameters
= true;
15656 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15657 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15658 TYPE_TEMPLATE_ARGUMENTS (type
)
15659 = XOBNEWVEC (&objfile
->objfile_obstack
,
15661 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15662 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15663 template_args
.data (),
15664 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15665 * sizeof (struct symbol
*)));
15668 /* Attach fields and member functions to the type. */
15669 if (fi
.nfields () > 0)
15670 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15671 if (!fi
.fnfieldlists
.empty ())
15673 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15675 /* Get the type which refers to the base class (possibly this
15676 class itself) which contains the vtable pointer for the current
15677 class from the DW_AT_containing_type attribute. This use of
15678 DW_AT_containing_type is a GNU extension. */
15680 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15682 struct type
*t
= die_containing_type (die
, cu
);
15684 set_type_vptr_basetype (type
, t
);
15689 /* Our own class provides vtbl ptr. */
15690 for (i
= TYPE_NFIELDS (t
) - 1;
15691 i
>= TYPE_N_BASECLASSES (t
);
15694 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15696 if (is_vtable_name (fieldname
, cu
))
15698 set_type_vptr_fieldno (type
, i
);
15703 /* Complain if virtual function table field not found. */
15704 if (i
< TYPE_N_BASECLASSES (t
))
15705 complaint (_("virtual function table pointer "
15706 "not found when defining class '%s'"),
15707 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
15711 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15714 else if (cu
->producer
15715 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15717 /* The IBM XLC compiler does not provide direct indication
15718 of the containing type, but the vtable pointer is
15719 always named __vfp. */
15723 for (i
= TYPE_NFIELDS (type
) - 1;
15724 i
>= TYPE_N_BASECLASSES (type
);
15727 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15729 set_type_vptr_fieldno (type
, i
);
15730 set_type_vptr_basetype (type
, type
);
15737 /* Copy fi.typedef_field_list linked list elements content into the
15738 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15739 if (!fi
.typedef_field_list
.empty ())
15741 int count
= fi
.typedef_field_list
.size ();
15743 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15744 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15745 = ((struct decl_field
*)
15747 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15748 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15750 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15751 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15754 /* Copy fi.nested_types_list linked list elements content into the
15755 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15756 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15758 int count
= fi
.nested_types_list
.size ();
15760 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15761 TYPE_NESTED_TYPES_ARRAY (type
)
15762 = ((struct decl_field
*)
15763 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15764 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15766 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15767 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15771 quirk_gcc_member_function_pointer (type
, objfile
);
15772 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15773 cu
->rust_unions
.push_back (type
);
15775 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15776 snapshots) has been known to create a die giving a declaration
15777 for a class that has, as a child, a die giving a definition for a
15778 nested class. So we have to process our children even if the
15779 current die is a declaration. Normally, of course, a declaration
15780 won't have any children at all. */
15782 child_die
= die
->child
;
15784 while (child_die
!= NULL
&& child_die
->tag
)
15786 if (child_die
->tag
== DW_TAG_member
15787 || child_die
->tag
== DW_TAG_variable
15788 || child_die
->tag
== DW_TAG_inheritance
15789 || child_die
->tag
== DW_TAG_template_value_param
15790 || child_die
->tag
== DW_TAG_template_type_param
)
15795 process_die (child_die
, cu
);
15797 child_die
= child_die
->sibling
;
15800 /* Do not consider external references. According to the DWARF standard,
15801 these DIEs are identified by the fact that they have no byte_size
15802 attribute, and a declaration attribute. */
15803 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
15804 || !die_is_declaration (die
, cu
)
15805 || dwarf2_attr (die
, DW_AT_signature
, cu
) != NULL
)
15807 struct symbol
*sym
= new_symbol (die
, type
, cu
);
15809 if (has_template_parameters
)
15811 struct symtab
*symtab
;
15812 if (sym
!= nullptr)
15813 symtab
= symbol_symtab (sym
);
15814 else if (cu
->line_header
!= nullptr)
15816 /* Any related symtab will do. */
15818 = cu
->line_header
->file_names ()[0].symtab
;
15823 complaint (_("could not find suitable "
15824 "symtab for template parameter"
15825 " - DIE at %s [in module %s]"),
15826 sect_offset_str (die
->sect_off
),
15827 objfile_name (objfile
));
15830 if (symtab
!= nullptr)
15832 /* Make sure that the symtab is set on the new symbols.
15833 Even though they don't appear in this symtab directly,
15834 other parts of gdb assume that symbols do, and this is
15835 reasonably true. */
15836 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
15837 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
15843 /* Assuming DIE is an enumeration type, and TYPE is its associated
15844 type, update TYPE using some information only available in DIE's
15845 children. In particular, the fields are computed. */
15848 update_enumeration_type_from_children (struct die_info
*die
,
15850 struct dwarf2_cu
*cu
)
15852 struct die_info
*child_die
;
15853 int unsigned_enum
= 1;
15856 auto_obstack obstack
;
15857 std::vector
<struct field
> fields
;
15859 for (child_die
= die
->child
;
15860 child_die
!= NULL
&& child_die
->tag
;
15861 child_die
= child_die
->sibling
)
15863 struct attribute
*attr
;
15865 const gdb_byte
*bytes
;
15866 struct dwarf2_locexpr_baton
*baton
;
15869 if (child_die
->tag
!= DW_TAG_enumerator
)
15872 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
15876 name
= dwarf2_name (child_die
, cu
);
15878 name
= "<anonymous enumerator>";
15880 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
15881 &value
, &bytes
, &baton
);
15889 if (count_one_bits_ll (value
) >= 2)
15893 fields
.emplace_back ();
15894 struct field
&field
= fields
.back ();
15895 FIELD_NAME (field
) = dwarf2_physname (name
, child_die
, cu
);
15896 SET_FIELD_ENUMVAL (field
, value
);
15899 if (!fields
.empty ())
15901 TYPE_NFIELDS (type
) = fields
.size ();
15902 TYPE_FIELDS (type
) = (struct field
*)
15903 TYPE_ALLOC (type
, sizeof (struct field
) * fields
.size ());
15904 memcpy (TYPE_FIELDS (type
), fields
.data (),
15905 sizeof (struct field
) * fields
.size ());
15909 TYPE_UNSIGNED (type
) = 1;
15911 TYPE_FLAG_ENUM (type
) = 1;
15914 /* Given a DW_AT_enumeration_type die, set its type. We do not
15915 complete the type's fields yet, or create any symbols. */
15917 static struct type
*
15918 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15920 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15922 struct attribute
*attr
;
15925 /* If the definition of this type lives in .debug_types, read that type.
15926 Don't follow DW_AT_specification though, that will take us back up
15927 the chain and we want to go down. */
15928 attr
= die
->attr (DW_AT_signature
);
15929 if (attr
!= nullptr)
15931 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15933 /* The type's CU may not be the same as CU.
15934 Ensure TYPE is recorded with CU in die_type_hash. */
15935 return set_die_type (die
, type
, cu
);
15938 type
= alloc_type (objfile
);
15940 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
15941 name
= dwarf2_full_name (NULL
, die
, cu
);
15943 TYPE_NAME (type
) = name
;
15945 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
15948 struct type
*underlying_type
= die_type (die
, cu
);
15950 TYPE_TARGET_TYPE (type
) = underlying_type
;
15953 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15954 if (attr
!= nullptr)
15956 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15960 TYPE_LENGTH (type
) = 0;
15963 maybe_set_alignment (cu
, die
, type
);
15965 /* The enumeration DIE can be incomplete. In Ada, any type can be
15966 declared as private in the package spec, and then defined only
15967 inside the package body. Such types are known as Taft Amendment
15968 Types. When another package uses such a type, an incomplete DIE
15969 may be generated by the compiler. */
15970 if (die_is_declaration (die
, cu
))
15971 TYPE_STUB (type
) = 1;
15973 /* If this type has an underlying type that is not a stub, then we
15974 may use its attributes. We always use the "unsigned" attribute
15975 in this situation, because ordinarily we guess whether the type
15976 is unsigned -- but the guess can be wrong and the underlying type
15977 can tell us the reality. However, we defer to a local size
15978 attribute if one exists, because this lets the compiler override
15979 the underlying type if needed. */
15980 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
15982 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
15983 underlying_type
= check_typedef (underlying_type
);
15984 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (underlying_type
);
15985 if (TYPE_LENGTH (type
) == 0)
15986 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
15987 if (TYPE_RAW_ALIGN (type
) == 0
15988 && TYPE_RAW_ALIGN (underlying_type
) != 0)
15989 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
15992 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
15994 set_die_type (die
, type
, cu
);
15996 /* Finish the creation of this type by using the enum's children.
15997 Note that, as usual, this must come after set_die_type to avoid
15998 infinite recursion when trying to compute the names of the
16000 update_enumeration_type_from_children (die
, type
, cu
);
16005 /* Given a pointer to a die which begins an enumeration, process all
16006 the dies that define the members of the enumeration, and create the
16007 symbol for the enumeration type.
16009 NOTE: We reverse the order of the element list. */
16012 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16014 struct type
*this_type
;
16016 this_type
= get_die_type (die
, cu
);
16017 if (this_type
== NULL
)
16018 this_type
= read_enumeration_type (die
, cu
);
16020 if (die
->child
!= NULL
)
16022 struct die_info
*child_die
;
16025 child_die
= die
->child
;
16026 while (child_die
&& child_die
->tag
)
16028 if (child_die
->tag
!= DW_TAG_enumerator
)
16030 process_die (child_die
, cu
);
16034 name
= dwarf2_name (child_die
, cu
);
16036 new_symbol (child_die
, this_type
, cu
);
16039 child_die
= child_die
->sibling
;
16043 /* If we are reading an enum from a .debug_types unit, and the enum
16044 is a declaration, and the enum is not the signatured type in the
16045 unit, then we do not want to add a symbol for it. Adding a
16046 symbol would in some cases obscure the true definition of the
16047 enum, giving users an incomplete type when the definition is
16048 actually available. Note that we do not want to do this for all
16049 enums which are just declarations, because C++0x allows forward
16050 enum declarations. */
16051 if (cu
->per_cu
->is_debug_types
16052 && die_is_declaration (die
, cu
))
16054 struct signatured_type
*sig_type
;
16056 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16057 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16058 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16062 new_symbol (die
, this_type
, cu
);
16065 /* Extract all information from a DW_TAG_array_type DIE and put it in
16066 the DIE's type field. For now, this only handles one dimensional
16069 static struct type
*
16070 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16072 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16073 struct die_info
*child_die
;
16075 struct type
*element_type
, *range_type
, *index_type
;
16076 struct attribute
*attr
;
16078 struct dynamic_prop
*byte_stride_prop
= NULL
;
16079 unsigned int bit_stride
= 0;
16081 element_type
= die_type (die
, cu
);
16083 /* The die_type call above may have already set the type for this DIE. */
16084 type
= get_die_type (die
, cu
);
16088 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16092 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
16095 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16096 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16100 complaint (_("unable to read array DW_AT_byte_stride "
16101 " - DIE at %s [in module %s]"),
16102 sect_offset_str (die
->sect_off
),
16103 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16104 /* Ignore this attribute. We will likely not be able to print
16105 arrays of this type correctly, but there is little we can do
16106 to help if we cannot read the attribute's value. */
16107 byte_stride_prop
= NULL
;
16111 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16113 bit_stride
= DW_UNSND (attr
);
16115 /* Irix 6.2 native cc creates array types without children for
16116 arrays with unspecified length. */
16117 if (die
->child
== NULL
)
16119 index_type
= objfile_type (objfile
)->builtin_int
;
16120 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16121 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16122 byte_stride_prop
, bit_stride
);
16123 return set_die_type (die
, type
, cu
);
16126 std::vector
<struct type
*> range_types
;
16127 child_die
= die
->child
;
16128 while (child_die
&& child_die
->tag
)
16130 if (child_die
->tag
== DW_TAG_subrange_type
)
16132 struct type
*child_type
= read_type_die (child_die
, cu
);
16134 if (child_type
!= NULL
)
16136 /* The range type was succesfully read. Save it for the
16137 array type creation. */
16138 range_types
.push_back (child_type
);
16141 child_die
= child_die
->sibling
;
16144 /* Dwarf2 dimensions are output from left to right, create the
16145 necessary array types in backwards order. */
16147 type
= element_type
;
16149 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16153 while (i
< range_types
.size ())
16154 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16155 byte_stride_prop
, bit_stride
);
16159 size_t ndim
= range_types
.size ();
16161 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16162 byte_stride_prop
, bit_stride
);
16165 /* Understand Dwarf2 support for vector types (like they occur on
16166 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16167 array type. This is not part of the Dwarf2/3 standard yet, but a
16168 custom vendor extension. The main difference between a regular
16169 array and the vector variant is that vectors are passed by value
16171 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16172 if (attr
!= nullptr)
16173 make_vector_type (type
);
16175 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16176 implementation may choose to implement triple vectors using this
16178 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16179 if (attr
!= nullptr)
16181 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16182 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16184 complaint (_("DW_AT_byte_size for array type smaller "
16185 "than the total size of elements"));
16188 name
= dwarf2_name (die
, cu
);
16190 TYPE_NAME (type
) = name
;
16192 maybe_set_alignment (cu
, die
, type
);
16194 /* Install the type in the die. */
16195 set_die_type (die
, type
, cu
);
16197 /* set_die_type should be already done. */
16198 set_descriptive_type (type
, die
, cu
);
16203 static enum dwarf_array_dim_ordering
16204 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16206 struct attribute
*attr
;
16208 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16210 if (attr
!= nullptr)
16211 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16213 /* GNU F77 is a special case, as at 08/2004 array type info is the
16214 opposite order to the dwarf2 specification, but data is still
16215 laid out as per normal fortran.
16217 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16218 version checking. */
16220 if (cu
->language
== language_fortran
16221 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16223 return DW_ORD_row_major
;
16226 switch (cu
->language_defn
->la_array_ordering
)
16228 case array_column_major
:
16229 return DW_ORD_col_major
;
16230 case array_row_major
:
16232 return DW_ORD_row_major
;
16236 /* Extract all information from a DW_TAG_set_type DIE and put it in
16237 the DIE's type field. */
16239 static struct type
*
16240 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16242 struct type
*domain_type
, *set_type
;
16243 struct attribute
*attr
;
16245 domain_type
= die_type (die
, cu
);
16247 /* The die_type call above may have already set the type for this DIE. */
16248 set_type
= get_die_type (die
, cu
);
16252 set_type
= create_set_type (NULL
, domain_type
);
16254 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16255 if (attr
!= nullptr)
16256 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16258 maybe_set_alignment (cu
, die
, set_type
);
16260 return set_die_type (die
, set_type
, cu
);
16263 /* A helper for read_common_block that creates a locexpr baton.
16264 SYM is the symbol which we are marking as computed.
16265 COMMON_DIE is the DIE for the common block.
16266 COMMON_LOC is the location expression attribute for the common
16268 MEMBER_LOC is the location expression attribute for the particular
16269 member of the common block that we are processing.
16270 CU is the CU from which the above come. */
16273 mark_common_block_symbol_computed (struct symbol
*sym
,
16274 struct die_info
*common_die
,
16275 struct attribute
*common_loc
,
16276 struct attribute
*member_loc
,
16277 struct dwarf2_cu
*cu
)
16279 struct dwarf2_per_objfile
*dwarf2_per_objfile
16280 = cu
->per_cu
->dwarf2_per_objfile
;
16281 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16282 struct dwarf2_locexpr_baton
*baton
;
16284 unsigned int cu_off
;
16285 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
16286 LONGEST offset
= 0;
16288 gdb_assert (common_loc
&& member_loc
);
16289 gdb_assert (common_loc
->form_is_block ());
16290 gdb_assert (member_loc
->form_is_block ()
16291 || member_loc
->form_is_constant ());
16293 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16294 baton
->per_cu
= cu
->per_cu
;
16295 gdb_assert (baton
->per_cu
);
16297 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16299 if (member_loc
->form_is_constant ())
16301 offset
= member_loc
->constant_value (0);
16302 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16305 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16307 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16310 *ptr
++ = DW_OP_call4
;
16311 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16312 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16315 if (member_loc
->form_is_constant ())
16317 *ptr
++ = DW_OP_addr
;
16318 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16319 ptr
+= cu
->header
.addr_size
;
16323 /* We have to copy the data here, because DW_OP_call4 will only
16324 use a DW_AT_location attribute. */
16325 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16326 ptr
+= DW_BLOCK (member_loc
)->size
;
16329 *ptr
++ = DW_OP_plus
;
16330 gdb_assert (ptr
- baton
->data
== baton
->size
);
16332 SYMBOL_LOCATION_BATON (sym
) = baton
;
16333 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16336 /* Create appropriate locally-scoped variables for all the
16337 DW_TAG_common_block entries. Also create a struct common_block
16338 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16339 is used to separate the common blocks name namespace from regular
16343 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16345 struct attribute
*attr
;
16347 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16348 if (attr
!= nullptr)
16350 /* Support the .debug_loc offsets. */
16351 if (attr
->form_is_block ())
16355 else if (attr
->form_is_section_offset ())
16357 dwarf2_complex_location_expr_complaint ();
16362 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16363 "common block member");
16368 if (die
->child
!= NULL
)
16370 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16371 struct die_info
*child_die
;
16372 size_t n_entries
= 0, size
;
16373 struct common_block
*common_block
;
16374 struct symbol
*sym
;
16376 for (child_die
= die
->child
;
16377 child_die
&& child_die
->tag
;
16378 child_die
= child_die
->sibling
)
16381 size
= (sizeof (struct common_block
)
16382 + (n_entries
- 1) * sizeof (struct symbol
*));
16384 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16386 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16387 common_block
->n_entries
= 0;
16389 for (child_die
= die
->child
;
16390 child_die
&& child_die
->tag
;
16391 child_die
= child_die
->sibling
)
16393 /* Create the symbol in the DW_TAG_common_block block in the current
16395 sym
= new_symbol (child_die
, NULL
, cu
);
16398 struct attribute
*member_loc
;
16400 common_block
->contents
[common_block
->n_entries
++] = sym
;
16402 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16406 /* GDB has handled this for a long time, but it is
16407 not specified by DWARF. It seems to have been
16408 emitted by gfortran at least as recently as:
16409 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16410 complaint (_("Variable in common block has "
16411 "DW_AT_data_member_location "
16412 "- DIE at %s [in module %s]"),
16413 sect_offset_str (child_die
->sect_off
),
16414 objfile_name (objfile
));
16416 if (member_loc
->form_is_section_offset ())
16417 dwarf2_complex_location_expr_complaint ();
16418 else if (member_loc
->form_is_constant ()
16419 || member_loc
->form_is_block ())
16421 if (attr
!= nullptr)
16422 mark_common_block_symbol_computed (sym
, die
, attr
,
16426 dwarf2_complex_location_expr_complaint ();
16431 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16432 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16436 /* Create a type for a C++ namespace. */
16438 static struct type
*
16439 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16441 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16442 const char *previous_prefix
, *name
;
16446 /* For extensions, reuse the type of the original namespace. */
16447 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16449 struct die_info
*ext_die
;
16450 struct dwarf2_cu
*ext_cu
= cu
;
16452 ext_die
= dwarf2_extension (die
, &ext_cu
);
16453 type
= read_type_die (ext_die
, ext_cu
);
16455 /* EXT_CU may not be the same as CU.
16456 Ensure TYPE is recorded with CU in die_type_hash. */
16457 return set_die_type (die
, type
, cu
);
16460 name
= namespace_name (die
, &is_anonymous
, cu
);
16462 /* Now build the name of the current namespace. */
16464 previous_prefix
= determine_prefix (die
, cu
);
16465 if (previous_prefix
[0] != '\0')
16466 name
= typename_concat (&objfile
->objfile_obstack
,
16467 previous_prefix
, name
, 0, cu
);
16469 /* Create the type. */
16470 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16472 return set_die_type (die
, type
, cu
);
16475 /* Read a namespace scope. */
16478 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16480 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16483 /* Add a symbol associated to this if we haven't seen the namespace
16484 before. Also, add a using directive if it's an anonymous
16487 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16491 type
= read_type_die (die
, cu
);
16492 new_symbol (die
, type
, cu
);
16494 namespace_name (die
, &is_anonymous
, cu
);
16497 const char *previous_prefix
= determine_prefix (die
, cu
);
16499 std::vector
<const char *> excludes
;
16500 add_using_directive (using_directives (cu
),
16501 previous_prefix
, TYPE_NAME (type
), NULL
,
16502 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16506 if (die
->child
!= NULL
)
16508 struct die_info
*child_die
= die
->child
;
16510 while (child_die
&& child_die
->tag
)
16512 process_die (child_die
, cu
);
16513 child_die
= child_die
->sibling
;
16518 /* Read a Fortran module as type. This DIE can be only a declaration used for
16519 imported module. Still we need that type as local Fortran "use ... only"
16520 declaration imports depend on the created type in determine_prefix. */
16522 static struct type
*
16523 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16525 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16526 const char *module_name
;
16529 module_name
= dwarf2_name (die
, cu
);
16530 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16532 return set_die_type (die
, type
, cu
);
16535 /* Read a Fortran module. */
16538 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16540 struct die_info
*child_die
= die
->child
;
16543 type
= read_type_die (die
, cu
);
16544 new_symbol (die
, type
, cu
);
16546 while (child_die
&& child_die
->tag
)
16548 process_die (child_die
, cu
);
16549 child_die
= child_die
->sibling
;
16553 /* Return the name of the namespace represented by DIE. Set
16554 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16557 static const char *
16558 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16560 struct die_info
*current_die
;
16561 const char *name
= NULL
;
16563 /* Loop through the extensions until we find a name. */
16565 for (current_die
= die
;
16566 current_die
!= NULL
;
16567 current_die
= dwarf2_extension (die
, &cu
))
16569 /* We don't use dwarf2_name here so that we can detect the absence
16570 of a name -> anonymous namespace. */
16571 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16577 /* Is it an anonymous namespace? */
16579 *is_anonymous
= (name
== NULL
);
16581 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16586 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16587 the user defined type vector. */
16589 static struct type
*
16590 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16592 struct gdbarch
*gdbarch
16593 = cu
->per_cu
->dwarf2_per_objfile
->objfile
->arch ();
16594 struct comp_unit_head
*cu_header
= &cu
->header
;
16596 struct attribute
*attr_byte_size
;
16597 struct attribute
*attr_address_class
;
16598 int byte_size
, addr_class
;
16599 struct type
*target_type
;
16601 target_type
= die_type (die
, cu
);
16603 /* The die_type call above may have already set the type for this DIE. */
16604 type
= get_die_type (die
, cu
);
16608 type
= lookup_pointer_type (target_type
);
16610 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16611 if (attr_byte_size
)
16612 byte_size
= DW_UNSND (attr_byte_size
);
16614 byte_size
= cu_header
->addr_size
;
16616 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16617 if (attr_address_class
)
16618 addr_class
= DW_UNSND (attr_address_class
);
16620 addr_class
= DW_ADDR_none
;
16622 ULONGEST alignment
= get_alignment (cu
, die
);
16624 /* If the pointer size, alignment, or address class is different
16625 than the default, create a type variant marked as such and set
16626 the length accordingly. */
16627 if (TYPE_LENGTH (type
) != byte_size
16628 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16629 && alignment
!= TYPE_RAW_ALIGN (type
))
16630 || addr_class
!= DW_ADDR_none
)
16632 if (gdbarch_address_class_type_flags_p (gdbarch
))
16636 type_flags
= gdbarch_address_class_type_flags
16637 (gdbarch
, byte_size
, addr_class
);
16638 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16640 type
= make_type_with_address_space (type
, type_flags
);
16642 else if (TYPE_LENGTH (type
) != byte_size
)
16644 complaint (_("invalid pointer size %d"), byte_size
);
16646 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16648 complaint (_("Invalid DW_AT_alignment"
16649 " - DIE at %s [in module %s]"),
16650 sect_offset_str (die
->sect_off
),
16651 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16655 /* Should we also complain about unhandled address classes? */
16659 TYPE_LENGTH (type
) = byte_size
;
16660 set_type_align (type
, alignment
);
16661 return set_die_type (die
, type
, cu
);
16664 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16665 the user defined type vector. */
16667 static struct type
*
16668 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16671 struct type
*to_type
;
16672 struct type
*domain
;
16674 to_type
= die_type (die
, cu
);
16675 domain
= die_containing_type (die
, cu
);
16677 /* The calls above may have already set the type for this DIE. */
16678 type
= get_die_type (die
, cu
);
16682 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16683 type
= lookup_methodptr_type (to_type
);
16684 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16686 struct type
*new_type
16687 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16689 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16690 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16691 TYPE_VARARGS (to_type
));
16692 type
= lookup_methodptr_type (new_type
);
16695 type
= lookup_memberptr_type (to_type
, domain
);
16697 return set_die_type (die
, type
, cu
);
16700 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16701 the user defined type vector. */
16703 static struct type
*
16704 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16705 enum type_code refcode
)
16707 struct comp_unit_head
*cu_header
= &cu
->header
;
16708 struct type
*type
, *target_type
;
16709 struct attribute
*attr
;
16711 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16713 target_type
= die_type (die
, cu
);
16715 /* The die_type call above may have already set the type for this DIE. */
16716 type
= get_die_type (die
, cu
);
16720 type
= lookup_reference_type (target_type
, refcode
);
16721 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16722 if (attr
!= nullptr)
16724 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16728 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16730 maybe_set_alignment (cu
, die
, type
);
16731 return set_die_type (die
, type
, cu
);
16734 /* Add the given cv-qualifiers to the element type of the array. GCC
16735 outputs DWARF type qualifiers that apply to an array, not the
16736 element type. But GDB relies on the array element type to carry
16737 the cv-qualifiers. This mimics section 6.7.3 of the C99
16740 static struct type
*
16741 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16742 struct type
*base_type
, int cnst
, int voltl
)
16744 struct type
*el_type
, *inner_array
;
16746 base_type
= copy_type (base_type
);
16747 inner_array
= base_type
;
16749 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
16751 TYPE_TARGET_TYPE (inner_array
) =
16752 copy_type (TYPE_TARGET_TYPE (inner_array
));
16753 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16756 el_type
= TYPE_TARGET_TYPE (inner_array
);
16757 cnst
|= TYPE_CONST (el_type
);
16758 voltl
|= TYPE_VOLATILE (el_type
);
16759 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16761 return set_die_type (die
, base_type
, cu
);
16764 static struct type
*
16765 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16767 struct type
*base_type
, *cv_type
;
16769 base_type
= die_type (die
, cu
);
16771 /* The die_type call above may have already set the type for this DIE. */
16772 cv_type
= get_die_type (die
, cu
);
16776 /* In case the const qualifier is applied to an array type, the element type
16777 is so qualified, not the array type (section 6.7.3 of C99). */
16778 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16779 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16781 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16782 return set_die_type (die
, cv_type
, cu
);
16785 static struct type
*
16786 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16788 struct type
*base_type
, *cv_type
;
16790 base_type
= die_type (die
, cu
);
16792 /* The die_type call above may have already set the type for this DIE. */
16793 cv_type
= get_die_type (die
, cu
);
16797 /* In case the volatile qualifier is applied to an array type, the
16798 element type is so qualified, not the array type (section 6.7.3
16800 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16801 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16803 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16804 return set_die_type (die
, cv_type
, cu
);
16807 /* Handle DW_TAG_restrict_type. */
16809 static struct type
*
16810 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16812 struct type
*base_type
, *cv_type
;
16814 base_type
= die_type (die
, cu
);
16816 /* The die_type call above may have already set the type for this DIE. */
16817 cv_type
= get_die_type (die
, cu
);
16821 cv_type
= make_restrict_type (base_type
);
16822 return set_die_type (die
, cv_type
, cu
);
16825 /* Handle DW_TAG_atomic_type. */
16827 static struct type
*
16828 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16830 struct type
*base_type
, *cv_type
;
16832 base_type
= die_type (die
, cu
);
16834 /* The die_type call above may have already set the type for this DIE. */
16835 cv_type
= get_die_type (die
, cu
);
16839 cv_type
= make_atomic_type (base_type
);
16840 return set_die_type (die
, cv_type
, cu
);
16843 /* Extract all information from a DW_TAG_string_type DIE and add to
16844 the user defined type vector. It isn't really a user defined type,
16845 but it behaves like one, with other DIE's using an AT_user_def_type
16846 attribute to reference it. */
16848 static struct type
*
16849 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16851 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16852 struct gdbarch
*gdbarch
= objfile
->arch ();
16853 struct type
*type
, *range_type
, *index_type
, *char_type
;
16854 struct attribute
*attr
;
16855 struct dynamic_prop prop
;
16856 bool length_is_constant
= true;
16859 /* There are a couple of places where bit sizes might be made use of
16860 when parsing a DW_TAG_string_type, however, no producer that we know
16861 of make use of these. Handling bit sizes that are a multiple of the
16862 byte size is easy enough, but what about other bit sizes? Lets deal
16863 with that problem when we have to. Warn about these attributes being
16864 unsupported, then parse the type and ignore them like we always
16866 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
16867 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
16869 static bool warning_printed
= false;
16870 if (!warning_printed
)
16872 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
16873 "currently supported on DW_TAG_string_type."));
16874 warning_printed
= true;
16878 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
16879 if (attr
!= nullptr && !attr
->form_is_constant ())
16881 /* The string length describes the location at which the length of
16882 the string can be found. The size of the length field can be
16883 specified with one of the attributes below. */
16884 struct type
*prop_type
;
16885 struct attribute
*len
16886 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
16887 if (len
== nullptr)
16888 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16889 if (len
!= nullptr && len
->form_is_constant ())
16891 /* Pass 0 as the default as we know this attribute is constant
16892 and the default value will not be returned. */
16893 LONGEST sz
= len
->constant_value (0);
16894 prop_type
= cu
->per_cu
->int_type (sz
, true);
16898 /* If the size is not specified then we assume it is the size of
16899 an address on this target. */
16900 prop_type
= cu
->per_cu
->addr_sized_int_type (true);
16903 /* Convert the attribute into a dynamic property. */
16904 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
16907 length_is_constant
= false;
16909 else if (attr
!= nullptr)
16911 /* This DW_AT_string_length just contains the length with no
16912 indirection. There's no need to create a dynamic property in this
16913 case. Pass 0 for the default value as we know it will not be
16914 returned in this case. */
16915 length
= attr
->constant_value (0);
16917 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
16919 /* We don't currently support non-constant byte sizes for strings. */
16920 length
= attr
->constant_value (1);
16924 /* Use 1 as a fallback length if we have nothing else. */
16928 index_type
= objfile_type (objfile
)->builtin_int
;
16929 if (length_is_constant
)
16930 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
16933 struct dynamic_prop low_bound
;
16935 low_bound
.kind
= PROP_CONST
;
16936 low_bound
.data
.const_val
= 1;
16937 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
16939 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
16940 type
= create_string_type (NULL
, char_type
, range_type
);
16942 return set_die_type (die
, type
, cu
);
16945 /* Assuming that DIE corresponds to a function, returns nonzero
16946 if the function is prototyped. */
16949 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
16951 struct attribute
*attr
;
16953 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
16954 if (attr
&& (DW_UNSND (attr
) != 0))
16957 /* The DWARF standard implies that the DW_AT_prototyped attribute
16958 is only meaningful for C, but the concept also extends to other
16959 languages that allow unprototyped functions (Eg: Objective C).
16960 For all other languages, assume that functions are always
16962 if (cu
->language
!= language_c
16963 && cu
->language
!= language_objc
16964 && cu
->language
!= language_opencl
)
16967 /* RealView does not emit DW_AT_prototyped. We can not distinguish
16968 prototyped and unprototyped functions; default to prototyped,
16969 since that is more common in modern code (and RealView warns
16970 about unprototyped functions). */
16971 if (producer_is_realview (cu
->producer
))
16977 /* Handle DIES due to C code like:
16981 int (*funcp)(int a, long l);
16985 ('funcp' generates a DW_TAG_subroutine_type DIE). */
16987 static struct type
*
16988 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16990 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16991 struct type
*type
; /* Type that this function returns. */
16992 struct type
*ftype
; /* Function that returns above type. */
16993 struct attribute
*attr
;
16995 type
= die_type (die
, cu
);
16997 /* The die_type call above may have already set the type for this DIE. */
16998 ftype
= get_die_type (die
, cu
);
17002 ftype
= lookup_function_type (type
);
17004 if (prototyped_function_p (die
, cu
))
17005 TYPE_PROTOTYPED (ftype
) = 1;
17007 /* Store the calling convention in the type if it's available in
17008 the subroutine die. Otherwise set the calling convention to
17009 the default value DW_CC_normal. */
17010 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17011 if (attr
!= nullptr
17012 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
17013 TYPE_CALLING_CONVENTION (ftype
)
17014 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
17015 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17016 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17018 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17020 /* Record whether the function returns normally to its caller or not
17021 if the DWARF producer set that information. */
17022 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17023 if (attr
&& (DW_UNSND (attr
) != 0))
17024 TYPE_NO_RETURN (ftype
) = 1;
17026 /* We need to add the subroutine type to the die immediately so
17027 we don't infinitely recurse when dealing with parameters
17028 declared as the same subroutine type. */
17029 set_die_type (die
, ftype
, cu
);
17031 if (die
->child
!= NULL
)
17033 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17034 struct die_info
*child_die
;
17035 int nparams
, iparams
;
17037 /* Count the number of parameters.
17038 FIXME: GDB currently ignores vararg functions, but knows about
17039 vararg member functions. */
17041 child_die
= die
->child
;
17042 while (child_die
&& child_die
->tag
)
17044 if (child_die
->tag
== DW_TAG_formal_parameter
)
17046 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17047 TYPE_VARARGS (ftype
) = 1;
17048 child_die
= child_die
->sibling
;
17051 /* Allocate storage for parameters and fill them in. */
17052 TYPE_NFIELDS (ftype
) = nparams
;
17053 TYPE_FIELDS (ftype
) = (struct field
*)
17054 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17056 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17057 even if we error out during the parameters reading below. */
17058 for (iparams
= 0; iparams
< nparams
; iparams
++)
17059 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17062 child_die
= die
->child
;
17063 while (child_die
&& child_die
->tag
)
17065 if (child_die
->tag
== DW_TAG_formal_parameter
)
17067 struct type
*arg_type
;
17069 /* DWARF version 2 has no clean way to discern C++
17070 static and non-static member functions. G++ helps
17071 GDB by marking the first parameter for non-static
17072 member functions (which is the this pointer) as
17073 artificial. We pass this information to
17074 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17076 DWARF version 3 added DW_AT_object_pointer, which GCC
17077 4.5 does not yet generate. */
17078 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17079 if (attr
!= nullptr)
17080 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17082 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17083 arg_type
= die_type (child_die
, cu
);
17085 /* RealView does not mark THIS as const, which the testsuite
17086 expects. GCC marks THIS as const in method definitions,
17087 but not in the class specifications (GCC PR 43053). */
17088 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17089 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17092 struct dwarf2_cu
*arg_cu
= cu
;
17093 const char *name
= dwarf2_name (child_die
, cu
);
17095 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17096 if (attr
!= nullptr)
17098 /* If the compiler emits this, use it. */
17099 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17102 else if (name
&& strcmp (name
, "this") == 0)
17103 /* Function definitions will have the argument names. */
17105 else if (name
== NULL
&& iparams
== 0)
17106 /* Declarations may not have the names, so like
17107 elsewhere in GDB, assume an artificial first
17108 argument is "this". */
17112 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17116 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17119 child_die
= child_die
->sibling
;
17126 static struct type
*
17127 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17129 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17130 const char *name
= NULL
;
17131 struct type
*this_type
, *target_type
;
17133 name
= dwarf2_full_name (NULL
, die
, cu
);
17134 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17135 TYPE_TARGET_STUB (this_type
) = 1;
17136 set_die_type (die
, this_type
, cu
);
17137 target_type
= die_type (die
, cu
);
17138 if (target_type
!= this_type
)
17139 TYPE_TARGET_TYPE (this_type
) = target_type
;
17142 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17143 spec and cause infinite loops in GDB. */
17144 complaint (_("Self-referential DW_TAG_typedef "
17145 "- DIE at %s [in module %s]"),
17146 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17147 TYPE_TARGET_TYPE (this_type
) = NULL
;
17151 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
17152 anonymous typedefs, which is, strictly speaking, invalid DWARF.
17153 Handle these by just returning the target type, rather than
17154 constructing an anonymous typedef type and trying to handle this
17156 set_die_type (die
, target_type
, cu
);
17157 return target_type
;
17162 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17163 (which may be different from NAME) to the architecture back-end to allow
17164 it to guess the correct format if necessary. */
17166 static struct type
*
17167 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17168 const char *name_hint
, enum bfd_endian byte_order
)
17170 struct gdbarch
*gdbarch
= objfile
->arch ();
17171 const struct floatformat
**format
;
17174 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17176 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
17178 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17183 /* Allocate an integer type of size BITS and name NAME. */
17185 static struct type
*
17186 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17187 int bits
, int unsigned_p
, const char *name
)
17191 /* Versions of Intel's C Compiler generate an integer type called "void"
17192 instead of using DW_TAG_unspecified_type. This has been seen on
17193 at least versions 14, 17, and 18. */
17194 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17195 && strcmp (name
, "void") == 0)
17196 type
= objfile_type (objfile
)->builtin_void
;
17198 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17203 /* Initialise and return a floating point type of size BITS suitable for
17204 use as a component of a complex number. The NAME_HINT is passed through
17205 when initialising the floating point type and is the name of the complex
17208 As DWARF doesn't currently provide an explicit name for the components
17209 of a complex number, but it can be helpful to have these components
17210 named, we try to select a suitable name based on the size of the
17212 static struct type
*
17213 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17214 struct objfile
*objfile
,
17215 int bits
, const char *name_hint
,
17216 enum bfd_endian byte_order
)
17218 gdbarch
*gdbarch
= objfile
->arch ();
17219 struct type
*tt
= nullptr;
17221 /* Try to find a suitable floating point builtin type of size BITS.
17222 We're going to use the name of this type as the name for the complex
17223 target type that we are about to create. */
17224 switch (cu
->language
)
17226 case language_fortran
:
17230 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17233 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17235 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17237 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17245 tt
= builtin_type (gdbarch
)->builtin_float
;
17248 tt
= builtin_type (gdbarch
)->builtin_double
;
17250 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17252 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17258 /* If the type we found doesn't match the size we were looking for, then
17259 pretend we didn't find a type at all, the complex target type we
17260 create will then be nameless. */
17261 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17264 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
17265 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
17268 /* Find a representation of a given base type and install
17269 it in the TYPE field of the die. */
17271 static struct type
*
17272 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17274 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17276 struct attribute
*attr
;
17277 int encoding
= 0, bits
= 0;
17281 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17282 if (attr
!= nullptr)
17283 encoding
= DW_UNSND (attr
);
17284 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17285 if (attr
!= nullptr)
17286 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17287 name
= dwarf2_name (die
, cu
);
17289 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17291 arch
= objfile
->arch ();
17292 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
17294 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17297 int endianity
= DW_UNSND (attr
);
17302 byte_order
= BFD_ENDIAN_BIG
;
17304 case DW_END_little
:
17305 byte_order
= BFD_ENDIAN_LITTLE
;
17308 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
17315 case DW_ATE_address
:
17316 /* Turn DW_ATE_address into a void * pointer. */
17317 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17318 type
= init_pointer_type (objfile
, bits
, name
, type
);
17320 case DW_ATE_boolean
:
17321 type
= init_boolean_type (objfile
, bits
, 1, name
);
17323 case DW_ATE_complex_float
:
17324 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
17326 if (TYPE_CODE (type
) == TYPE_CODE_ERROR
)
17328 if (name
== nullptr)
17330 struct obstack
*obstack
17331 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17332 name
= obconcat (obstack
, "_Complex ", TYPE_NAME (type
),
17335 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17338 type
= init_complex_type (name
, type
);
17340 case DW_ATE_decimal_float
:
17341 type
= init_decfloat_type (objfile
, bits
, name
);
17344 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
17346 case DW_ATE_signed
:
17347 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17349 case DW_ATE_unsigned
:
17350 if (cu
->language
== language_fortran
17352 && startswith (name
, "character("))
17353 type
= init_character_type (objfile
, bits
, 1, name
);
17355 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17357 case DW_ATE_signed_char
:
17358 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17359 || cu
->language
== language_pascal
17360 || cu
->language
== language_fortran
)
17361 type
= init_character_type (objfile
, bits
, 0, name
);
17363 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17365 case DW_ATE_unsigned_char
:
17366 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17367 || cu
->language
== language_pascal
17368 || cu
->language
== language_fortran
17369 || cu
->language
== language_rust
)
17370 type
= init_character_type (objfile
, bits
, 1, name
);
17372 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17377 type
= builtin_type (arch
)->builtin_char16
;
17378 else if (bits
== 32)
17379 type
= builtin_type (arch
)->builtin_char32
;
17382 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17384 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17386 return set_die_type (die
, type
, cu
);
17391 complaint (_("unsupported DW_AT_encoding: '%s'"),
17392 dwarf_type_encoding_name (encoding
));
17393 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17397 if (name
&& strcmp (name
, "char") == 0)
17398 TYPE_NOSIGN (type
) = 1;
17400 maybe_set_alignment (cu
, die
, type
);
17402 TYPE_ENDIANITY_NOT_DEFAULT (type
) = gdbarch_byte_order (arch
) != byte_order
;
17404 return set_die_type (die
, type
, cu
);
17407 /* Parse dwarf attribute if it's a block, reference or constant and put the
17408 resulting value of the attribute into struct bound_prop.
17409 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17412 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17413 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17414 struct type
*default_type
)
17416 struct dwarf2_property_baton
*baton
;
17417 struct obstack
*obstack
17418 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17420 gdb_assert (default_type
!= NULL
);
17422 if (attr
== NULL
|| prop
== NULL
)
17425 if (attr
->form_is_block ())
17427 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17428 baton
->property_type
= default_type
;
17429 baton
->locexpr
.per_cu
= cu
->per_cu
;
17430 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17431 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17432 switch (attr
->name
)
17434 case DW_AT_string_length
:
17435 baton
->locexpr
.is_reference
= true;
17438 baton
->locexpr
.is_reference
= false;
17441 prop
->data
.baton
= baton
;
17442 prop
->kind
= PROP_LOCEXPR
;
17443 gdb_assert (prop
->data
.baton
!= NULL
);
17445 else if (attr
->form_is_ref ())
17447 struct dwarf2_cu
*target_cu
= cu
;
17448 struct die_info
*target_die
;
17449 struct attribute
*target_attr
;
17451 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17452 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17453 if (target_attr
== NULL
)
17454 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17456 if (target_attr
== NULL
)
17459 switch (target_attr
->name
)
17461 case DW_AT_location
:
17462 if (target_attr
->form_is_section_offset ())
17464 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17465 baton
->property_type
= die_type (target_die
, target_cu
);
17466 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17467 prop
->data
.baton
= baton
;
17468 prop
->kind
= PROP_LOCLIST
;
17469 gdb_assert (prop
->data
.baton
!= NULL
);
17471 else if (target_attr
->form_is_block ())
17473 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17474 baton
->property_type
= die_type (target_die
, target_cu
);
17475 baton
->locexpr
.per_cu
= cu
->per_cu
;
17476 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17477 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17478 baton
->locexpr
.is_reference
= true;
17479 prop
->data
.baton
= baton
;
17480 prop
->kind
= PROP_LOCEXPR
;
17481 gdb_assert (prop
->data
.baton
!= NULL
);
17485 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17486 "dynamic property");
17490 case DW_AT_data_member_location
:
17494 if (!handle_data_member_location (target_die
, target_cu
,
17498 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17499 baton
->property_type
= read_type_die (target_die
->parent
,
17501 baton
->offset_info
.offset
= offset
;
17502 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17503 prop
->data
.baton
= baton
;
17504 prop
->kind
= PROP_ADDR_OFFSET
;
17509 else if (attr
->form_is_constant ())
17511 prop
->data
.const_val
= attr
->constant_value (0);
17512 prop
->kind
= PROP_CONST
;
17516 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17517 dwarf2_name (die
, cu
));
17527 dwarf2_per_cu_data::int_type (int size_in_bytes
, bool unsigned_p
) const
17529 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17530 struct type
*int_type
;
17532 /* Helper macro to examine the various builtin types. */
17533 #define TRY_TYPE(F) \
17534 int_type = (unsigned_p \
17535 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17536 : objfile_type (objfile)->builtin_ ## F); \
17537 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
17544 TRY_TYPE (long_long
);
17548 gdb_assert_not_reached ("unable to find suitable integer type");
17554 dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p
) const
17556 int addr_size
= this->addr_size ();
17557 return int_type (addr_size
, unsigned_p
);
17560 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17561 present (which is valid) then compute the default type based on the
17562 compilation units address size. */
17564 static struct type
*
17565 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17567 struct type
*index_type
= die_type (die
, cu
);
17569 /* Dwarf-2 specifications explicitly allows to create subrange types
17570 without specifying a base type.
17571 In that case, the base type must be set to the type of
17572 the lower bound, upper bound or count, in that order, if any of these
17573 three attributes references an object that has a type.
17574 If no base type is found, the Dwarf-2 specifications say that
17575 a signed integer type of size equal to the size of an address should
17577 For the following C code: `extern char gdb_int [];'
17578 GCC produces an empty range DIE.
17579 FIXME: muller/2010-05-28: Possible references to object for low bound,
17580 high bound or count are not yet handled by this code. */
17581 if (TYPE_CODE (index_type
) == TYPE_CODE_VOID
)
17582 index_type
= cu
->per_cu
->addr_sized_int_type (false);
17587 /* Read the given DW_AT_subrange DIE. */
17589 static struct type
*
17590 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17592 struct type
*base_type
, *orig_base_type
;
17593 struct type
*range_type
;
17594 struct attribute
*attr
;
17595 struct dynamic_prop low
, high
;
17596 int low_default_is_valid
;
17597 int high_bound_is_count
= 0;
17599 ULONGEST negative_mask
;
17601 orig_base_type
= read_subrange_index_type (die
, cu
);
17603 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17604 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17605 creating the range type, but we use the result of check_typedef
17606 when examining properties of the type. */
17607 base_type
= check_typedef (orig_base_type
);
17609 /* The die_type call above may have already set the type for this DIE. */
17610 range_type
= get_die_type (die
, cu
);
17614 low
.kind
= PROP_CONST
;
17615 high
.kind
= PROP_CONST
;
17616 high
.data
.const_val
= 0;
17618 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17619 omitting DW_AT_lower_bound. */
17620 switch (cu
->language
)
17623 case language_cplus
:
17624 low
.data
.const_val
= 0;
17625 low_default_is_valid
= 1;
17627 case language_fortran
:
17628 low
.data
.const_val
= 1;
17629 low_default_is_valid
= 1;
17632 case language_objc
:
17633 case language_rust
:
17634 low
.data
.const_val
= 0;
17635 low_default_is_valid
= (cu
->header
.version
>= 4);
17639 case language_pascal
:
17640 low
.data
.const_val
= 1;
17641 low_default_is_valid
= (cu
->header
.version
>= 4);
17644 low
.data
.const_val
= 0;
17645 low_default_is_valid
= 0;
17649 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17650 if (attr
!= nullptr)
17651 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17652 else if (!low_default_is_valid
)
17653 complaint (_("Missing DW_AT_lower_bound "
17654 "- DIE at %s [in module %s]"),
17655 sect_offset_str (die
->sect_off
),
17656 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17658 struct attribute
*attr_ub
, *attr_count
;
17659 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17660 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17662 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17663 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17665 /* If bounds are constant do the final calculation here. */
17666 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17667 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17669 high_bound_is_count
= 1;
17673 if (attr_ub
!= NULL
)
17674 complaint (_("Unresolved DW_AT_upper_bound "
17675 "- DIE at %s [in module %s]"),
17676 sect_offset_str (die
->sect_off
),
17677 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17678 if (attr_count
!= NULL
)
17679 complaint (_("Unresolved DW_AT_count "
17680 "- DIE at %s [in module %s]"),
17681 sect_offset_str (die
->sect_off
),
17682 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17687 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17688 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
17689 bias
= bias_attr
->constant_value (0);
17691 /* Normally, the DWARF producers are expected to use a signed
17692 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17693 But this is unfortunately not always the case, as witnessed
17694 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17695 is used instead. To work around that ambiguity, we treat
17696 the bounds as signed, and thus sign-extend their values, when
17697 the base type is signed. */
17699 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17700 if (low
.kind
== PROP_CONST
17701 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17702 low
.data
.const_val
|= negative_mask
;
17703 if (high
.kind
== PROP_CONST
17704 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17705 high
.data
.const_val
|= negative_mask
;
17707 /* Check for bit and byte strides. */
17708 struct dynamic_prop byte_stride_prop
;
17709 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17710 if (attr_byte_stride
!= nullptr)
17712 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17713 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
17717 struct dynamic_prop bit_stride_prop
;
17718 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17719 if (attr_bit_stride
!= nullptr)
17721 /* It only makes sense to have either a bit or byte stride. */
17722 if (attr_byte_stride
!= nullptr)
17724 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
17725 "- DIE at %s [in module %s]"),
17726 sect_offset_str (die
->sect_off
),
17727 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17728 attr_bit_stride
= nullptr;
17732 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17733 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
17738 if (attr_byte_stride
!= nullptr
17739 || attr_bit_stride
!= nullptr)
17741 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
17742 struct dynamic_prop
*stride
17743 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
17746 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
17747 &high
, bias
, stride
, byte_stride_p
);
17750 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
17752 if (high_bound_is_count
)
17753 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17755 /* Ada expects an empty array on no boundary attributes. */
17756 if (attr
== NULL
&& cu
->language
!= language_ada
)
17757 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17759 name
= dwarf2_name (die
, cu
);
17761 TYPE_NAME (range_type
) = name
;
17763 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17764 if (attr
!= nullptr)
17765 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17767 maybe_set_alignment (cu
, die
, range_type
);
17769 set_die_type (die
, range_type
, cu
);
17771 /* set_die_type should be already done. */
17772 set_descriptive_type (range_type
, die
, cu
);
17777 static struct type
*
17778 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17782 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17784 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17786 /* In Ada, an unspecified type is typically used when the description
17787 of the type is deferred to a different unit. When encountering
17788 such a type, we treat it as a stub, and try to resolve it later on,
17790 if (cu
->language
== language_ada
)
17791 TYPE_STUB (type
) = 1;
17793 return set_die_type (die
, type
, cu
);
17796 /* Read a single die and all its descendents. Set the die's sibling
17797 field to NULL; set other fields in the die correctly, and set all
17798 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17799 location of the info_ptr after reading all of those dies. PARENT
17800 is the parent of the die in question. */
17802 static struct die_info
*
17803 read_die_and_children (const struct die_reader_specs
*reader
,
17804 const gdb_byte
*info_ptr
,
17805 const gdb_byte
**new_info_ptr
,
17806 struct die_info
*parent
)
17808 struct die_info
*die
;
17809 const gdb_byte
*cur_ptr
;
17811 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
17814 *new_info_ptr
= cur_ptr
;
17817 store_in_ref_table (die
, reader
->cu
);
17819 if (die
->has_children
)
17820 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17824 *new_info_ptr
= cur_ptr
;
17827 die
->sibling
= NULL
;
17828 die
->parent
= parent
;
17832 /* Read a die, all of its descendents, and all of its siblings; set
17833 all of the fields of all of the dies correctly. Arguments are as
17834 in read_die_and_children. */
17836 static struct die_info
*
17837 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17838 const gdb_byte
*info_ptr
,
17839 const gdb_byte
**new_info_ptr
,
17840 struct die_info
*parent
)
17842 struct die_info
*first_die
, *last_sibling
;
17843 const gdb_byte
*cur_ptr
;
17845 cur_ptr
= info_ptr
;
17846 first_die
= last_sibling
= NULL
;
17850 struct die_info
*die
17851 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17855 *new_info_ptr
= cur_ptr
;
17862 last_sibling
->sibling
= die
;
17864 last_sibling
= die
;
17868 /* Read a die, all of its descendents, and all of its siblings; set
17869 all of the fields of all of the dies correctly. Arguments are as
17870 in read_die_and_children.
17871 This the main entry point for reading a DIE and all its children. */
17873 static struct die_info
*
17874 read_die_and_siblings (const struct die_reader_specs
*reader
,
17875 const gdb_byte
*info_ptr
,
17876 const gdb_byte
**new_info_ptr
,
17877 struct die_info
*parent
)
17879 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17880 new_info_ptr
, parent
);
17882 if (dwarf_die_debug
)
17884 fprintf_unfiltered (gdb_stdlog
,
17885 "Read die from %s@0x%x of %s:\n",
17886 reader
->die_section
->get_name (),
17887 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17888 bfd_get_filename (reader
->abfd
));
17889 dump_die (die
, dwarf_die_debug
);
17895 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17897 The caller is responsible for filling in the extra attributes
17898 and updating (*DIEP)->num_attrs.
17899 Set DIEP to point to a newly allocated die with its information,
17900 except for its child, sibling, and parent fields. */
17902 static const gdb_byte
*
17903 read_full_die_1 (const struct die_reader_specs
*reader
,
17904 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17905 int num_extra_attrs
)
17907 unsigned int abbrev_number
, bytes_read
, i
;
17908 struct abbrev_info
*abbrev
;
17909 struct die_info
*die
;
17910 struct dwarf2_cu
*cu
= reader
->cu
;
17911 bfd
*abfd
= reader
->abfd
;
17913 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17914 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17915 info_ptr
+= bytes_read
;
17916 if (!abbrev_number
)
17922 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17924 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17926 bfd_get_filename (abfd
));
17928 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17929 die
->sect_off
= sect_off
;
17930 die
->tag
= abbrev
->tag
;
17931 die
->abbrev
= abbrev_number
;
17932 die
->has_children
= abbrev
->has_children
;
17934 /* Make the result usable.
17935 The caller needs to update num_attrs after adding the extra
17937 die
->num_attrs
= abbrev
->num_attrs
;
17939 std::vector
<int> indexes_that_need_reprocess
;
17940 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17942 bool need_reprocess
;
17944 read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17945 info_ptr
, &need_reprocess
);
17946 if (need_reprocess
)
17947 indexes_that_need_reprocess
.push_back (i
);
17950 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
17951 if (attr
!= nullptr)
17952 cu
->str_offsets_base
= DW_UNSND (attr
);
17954 attr
= die
->attr (DW_AT_loclists_base
);
17955 if (attr
!= nullptr)
17956 cu
->loclist_base
= DW_UNSND (attr
);
17958 auto maybe_addr_base
= die
->addr_base ();
17959 if (maybe_addr_base
.has_value ())
17960 cu
->addr_base
= *maybe_addr_base
;
17961 for (int index
: indexes_that_need_reprocess
)
17962 read_attribute_reprocess (reader
, &die
->attrs
[index
]);
17967 /* Read a die and all its attributes.
17968 Set DIEP to point to a newly allocated die with its information,
17969 except for its child, sibling, and parent fields. */
17971 static const gdb_byte
*
17972 read_full_die (const struct die_reader_specs
*reader
,
17973 struct die_info
**diep
, const gdb_byte
*info_ptr
)
17975 const gdb_byte
*result
;
17977 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
17979 if (dwarf_die_debug
)
17981 fprintf_unfiltered (gdb_stdlog
,
17982 "Read die from %s@0x%x of %s:\n",
17983 reader
->die_section
->get_name (),
17984 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17985 bfd_get_filename (reader
->abfd
));
17986 dump_die (*diep
, dwarf_die_debug
);
17993 /* Returns nonzero if TAG represents a type that we might generate a partial
17997 is_type_tag_for_partial (int tag
)
18002 /* Some types that would be reasonable to generate partial symbols for,
18003 that we don't at present. */
18004 case DW_TAG_array_type
:
18005 case DW_TAG_file_type
:
18006 case DW_TAG_ptr_to_member_type
:
18007 case DW_TAG_set_type
:
18008 case DW_TAG_string_type
:
18009 case DW_TAG_subroutine_type
:
18011 case DW_TAG_base_type
:
18012 case DW_TAG_class_type
:
18013 case DW_TAG_interface_type
:
18014 case DW_TAG_enumeration_type
:
18015 case DW_TAG_structure_type
:
18016 case DW_TAG_subrange_type
:
18017 case DW_TAG_typedef
:
18018 case DW_TAG_union_type
:
18025 /* Load all DIEs that are interesting for partial symbols into memory. */
18027 static struct partial_die_info
*
18028 load_partial_dies (const struct die_reader_specs
*reader
,
18029 const gdb_byte
*info_ptr
, int building_psymtab
)
18031 struct dwarf2_cu
*cu
= reader
->cu
;
18032 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18033 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18034 unsigned int bytes_read
;
18035 unsigned int load_all
= 0;
18036 int nesting_level
= 1;
18041 gdb_assert (cu
->per_cu
!= NULL
);
18042 if (cu
->per_cu
->load_all_dies
)
18046 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18050 &cu
->comp_unit_obstack
,
18051 hashtab_obstack_allocate
,
18052 dummy_obstack_deallocate
);
18056 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18058 /* A NULL abbrev means the end of a series of children. */
18059 if (abbrev
== NULL
)
18061 if (--nesting_level
== 0)
18064 info_ptr
+= bytes_read
;
18065 last_die
= parent_die
;
18066 parent_die
= parent_die
->die_parent
;
18070 /* Check for template arguments. We never save these; if
18071 they're seen, we just mark the parent, and go on our way. */
18072 if (parent_die
!= NULL
18073 && cu
->language
== language_cplus
18074 && (abbrev
->tag
== DW_TAG_template_type_param
18075 || abbrev
->tag
== DW_TAG_template_value_param
))
18077 parent_die
->has_template_arguments
= 1;
18081 /* We don't need a partial DIE for the template argument. */
18082 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18087 /* We only recurse into c++ subprograms looking for template arguments.
18088 Skip their other children. */
18090 && cu
->language
== language_cplus
18091 && parent_die
!= NULL
18092 && parent_die
->tag
== DW_TAG_subprogram
)
18094 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18098 /* Check whether this DIE is interesting enough to save. Normally
18099 we would not be interested in members here, but there may be
18100 later variables referencing them via DW_AT_specification (for
18101 static members). */
18103 && !is_type_tag_for_partial (abbrev
->tag
)
18104 && abbrev
->tag
!= DW_TAG_constant
18105 && abbrev
->tag
!= DW_TAG_enumerator
18106 && abbrev
->tag
!= DW_TAG_subprogram
18107 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18108 && abbrev
->tag
!= DW_TAG_lexical_block
18109 && abbrev
->tag
!= DW_TAG_variable
18110 && abbrev
->tag
!= DW_TAG_namespace
18111 && abbrev
->tag
!= DW_TAG_module
18112 && abbrev
->tag
!= DW_TAG_member
18113 && abbrev
->tag
!= DW_TAG_imported_unit
18114 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18116 /* Otherwise we skip to the next sibling, if any. */
18117 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18121 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18124 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18126 /* This two-pass algorithm for processing partial symbols has a
18127 high cost in cache pressure. Thus, handle some simple cases
18128 here which cover the majority of C partial symbols. DIEs
18129 which neither have specification tags in them, nor could have
18130 specification tags elsewhere pointing at them, can simply be
18131 processed and discarded.
18133 This segment is also optional; scan_partial_symbols and
18134 add_partial_symbol will handle these DIEs if we chain
18135 them in normally. When compilers which do not emit large
18136 quantities of duplicate debug information are more common,
18137 this code can probably be removed. */
18139 /* Any complete simple types at the top level (pretty much all
18140 of them, for a language without namespaces), can be processed
18142 if (parent_die
== NULL
18143 && pdi
.has_specification
== 0
18144 && pdi
.is_declaration
== 0
18145 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18146 || pdi
.tag
== DW_TAG_base_type
18147 || pdi
.tag
== DW_TAG_subrange_type
))
18149 if (building_psymtab
&& pdi
.name
!= NULL
)
18150 add_psymbol_to_list (pdi
.name
, false,
18151 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18152 psymbol_placement::STATIC
,
18153 0, cu
->language
, objfile
);
18154 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18158 /* The exception for DW_TAG_typedef with has_children above is
18159 a workaround of GCC PR debug/47510. In the case of this complaint
18160 type_name_or_error will error on such types later.
18162 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18163 it could not find the child DIEs referenced later, this is checked
18164 above. In correct DWARF DW_TAG_typedef should have no children. */
18166 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18167 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18168 "- DIE at %s [in module %s]"),
18169 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18171 /* If we're at the second level, and we're an enumerator, and
18172 our parent has no specification (meaning possibly lives in a
18173 namespace elsewhere), then we can add the partial symbol now
18174 instead of queueing it. */
18175 if (pdi
.tag
== DW_TAG_enumerator
18176 && parent_die
!= NULL
18177 && parent_die
->die_parent
== NULL
18178 && parent_die
->tag
== DW_TAG_enumeration_type
18179 && parent_die
->has_specification
== 0)
18181 if (pdi
.name
== NULL
)
18182 complaint (_("malformed enumerator DIE ignored"));
18183 else if (building_psymtab
)
18184 add_psymbol_to_list (pdi
.name
, false,
18185 VAR_DOMAIN
, LOC_CONST
, -1,
18186 cu
->language
== language_cplus
18187 ? psymbol_placement::GLOBAL
18188 : psymbol_placement::STATIC
,
18189 0, cu
->language
, objfile
);
18191 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18195 struct partial_die_info
*part_die
18196 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18198 /* We'll save this DIE so link it in. */
18199 part_die
->die_parent
= parent_die
;
18200 part_die
->die_sibling
= NULL
;
18201 part_die
->die_child
= NULL
;
18203 if (last_die
&& last_die
== parent_die
)
18204 last_die
->die_child
= part_die
;
18206 last_die
->die_sibling
= part_die
;
18208 last_die
= part_die
;
18210 if (first_die
== NULL
)
18211 first_die
= part_die
;
18213 /* Maybe add the DIE to the hash table. Not all DIEs that we
18214 find interesting need to be in the hash table, because we
18215 also have the parent/sibling/child chains; only those that we
18216 might refer to by offset later during partial symbol reading.
18218 For now this means things that might have be the target of a
18219 DW_AT_specification, DW_AT_abstract_origin, or
18220 DW_AT_extension. DW_AT_extension will refer only to
18221 namespaces; DW_AT_abstract_origin refers to functions (and
18222 many things under the function DIE, but we do not recurse
18223 into function DIEs during partial symbol reading) and
18224 possibly variables as well; DW_AT_specification refers to
18225 declarations. Declarations ought to have the DW_AT_declaration
18226 flag. It happens that GCC forgets to put it in sometimes, but
18227 only for functions, not for types.
18229 Adding more things than necessary to the hash table is harmless
18230 except for the performance cost. Adding too few will result in
18231 wasted time in find_partial_die, when we reread the compilation
18232 unit with load_all_dies set. */
18235 || abbrev
->tag
== DW_TAG_constant
18236 || abbrev
->tag
== DW_TAG_subprogram
18237 || abbrev
->tag
== DW_TAG_variable
18238 || abbrev
->tag
== DW_TAG_namespace
18239 || part_die
->is_declaration
)
18243 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18244 to_underlying (part_die
->sect_off
),
18249 /* For some DIEs we want to follow their children (if any). For C
18250 we have no reason to follow the children of structures; for other
18251 languages we have to, so that we can get at method physnames
18252 to infer fully qualified class names, for DW_AT_specification,
18253 and for C++ template arguments. For C++, we also look one level
18254 inside functions to find template arguments (if the name of the
18255 function does not already contain the template arguments).
18257 For Ada and Fortran, we need to scan the children of subprograms
18258 and lexical blocks as well because these languages allow the
18259 definition of nested entities that could be interesting for the
18260 debugger, such as nested subprograms for instance. */
18261 if (last_die
->has_children
18263 || last_die
->tag
== DW_TAG_namespace
18264 || last_die
->tag
== DW_TAG_module
18265 || last_die
->tag
== DW_TAG_enumeration_type
18266 || (cu
->language
== language_cplus
18267 && last_die
->tag
== DW_TAG_subprogram
18268 && (last_die
->name
== NULL
18269 || strchr (last_die
->name
, '<') == NULL
))
18270 || (cu
->language
!= language_c
18271 && (last_die
->tag
== DW_TAG_class_type
18272 || last_die
->tag
== DW_TAG_interface_type
18273 || last_die
->tag
== DW_TAG_structure_type
18274 || last_die
->tag
== DW_TAG_union_type
))
18275 || ((cu
->language
== language_ada
18276 || cu
->language
== language_fortran
)
18277 && (last_die
->tag
== DW_TAG_subprogram
18278 || last_die
->tag
== DW_TAG_lexical_block
))))
18281 parent_die
= last_die
;
18285 /* Otherwise we skip to the next sibling, if any. */
18286 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18288 /* Back to the top, do it again. */
18292 partial_die_info::partial_die_info (sect_offset sect_off_
,
18293 struct abbrev_info
*abbrev
)
18294 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18298 /* Read a minimal amount of information into the minimal die structure.
18299 INFO_PTR should point just after the initial uleb128 of a DIE. */
18302 partial_die_info::read (const struct die_reader_specs
*reader
,
18303 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18305 struct dwarf2_cu
*cu
= reader
->cu
;
18306 struct dwarf2_per_objfile
*dwarf2_per_objfile
18307 = cu
->per_cu
->dwarf2_per_objfile
;
18309 int has_low_pc_attr
= 0;
18310 int has_high_pc_attr
= 0;
18311 int high_pc_relative
= 0;
18313 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18316 bool need_reprocess
;
18317 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
],
18318 info_ptr
, &need_reprocess
);
18319 /* String and address offsets that need to do the reprocessing have
18320 already been read at this point, so there is no need to wait until
18321 the loop terminates to do the reprocessing. */
18322 if (need_reprocess
)
18323 read_attribute_reprocess (reader
, &attr
);
18324 /* Store the data if it is of an attribute we want to keep in a
18325 partial symbol table. */
18331 case DW_TAG_compile_unit
:
18332 case DW_TAG_partial_unit
:
18333 case DW_TAG_type_unit
:
18334 /* Compilation units have a DW_AT_name that is a filename, not
18335 a source language identifier. */
18336 case DW_TAG_enumeration_type
:
18337 case DW_TAG_enumerator
:
18338 /* These tags always have simple identifiers already; no need
18339 to canonicalize them. */
18340 name
= DW_STRING (&attr
);
18344 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18347 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
, objfile
);
18352 case DW_AT_linkage_name
:
18353 case DW_AT_MIPS_linkage_name
:
18354 /* Note that both forms of linkage name might appear. We
18355 assume they will be the same, and we only store the last
18357 linkage_name
= attr
.value_as_string ();
18358 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
18359 See https://github.com/rust-lang/rust/issues/32925. */
18360 if (cu
->language
== language_rust
&& linkage_name
!= NULL
18361 && strchr (linkage_name
, '{') != NULL
)
18362 linkage_name
= NULL
;
18365 has_low_pc_attr
= 1;
18366 lowpc
= attr
.value_as_address ();
18368 case DW_AT_high_pc
:
18369 has_high_pc_attr
= 1;
18370 highpc
= attr
.value_as_address ();
18371 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
18372 high_pc_relative
= 1;
18374 case DW_AT_location
:
18375 /* Support the .debug_loc offsets. */
18376 if (attr
.form_is_block ())
18378 d
.locdesc
= DW_BLOCK (&attr
);
18380 else if (attr
.form_is_section_offset ())
18382 dwarf2_complex_location_expr_complaint ();
18386 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18387 "partial symbol information");
18390 case DW_AT_external
:
18391 is_external
= DW_UNSND (&attr
);
18393 case DW_AT_declaration
:
18394 is_declaration
= DW_UNSND (&attr
);
18399 case DW_AT_abstract_origin
:
18400 case DW_AT_specification
:
18401 case DW_AT_extension
:
18402 has_specification
= 1;
18403 spec_offset
= attr
.get_ref_die_offset ();
18404 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18405 || cu
->per_cu
->is_dwz
);
18407 case DW_AT_sibling
:
18408 /* Ignore absolute siblings, they might point outside of
18409 the current compile unit. */
18410 if (attr
.form
== DW_FORM_ref_addr
)
18411 complaint (_("ignoring absolute DW_AT_sibling"));
18414 const gdb_byte
*buffer
= reader
->buffer
;
18415 sect_offset off
= attr
.get_ref_die_offset ();
18416 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18418 if (sibling_ptr
< info_ptr
)
18419 complaint (_("DW_AT_sibling points backwards"));
18420 else if (sibling_ptr
> reader
->buffer_end
)
18421 reader
->die_section
->overflow_complaint ();
18423 sibling
= sibling_ptr
;
18426 case DW_AT_byte_size
:
18429 case DW_AT_const_value
:
18430 has_const_value
= 1;
18432 case DW_AT_calling_convention
:
18433 /* DWARF doesn't provide a way to identify a program's source-level
18434 entry point. DW_AT_calling_convention attributes are only meant
18435 to describe functions' calling conventions.
18437 However, because it's a necessary piece of information in
18438 Fortran, and before DWARF 4 DW_CC_program was the only
18439 piece of debugging information whose definition refers to
18440 a 'main program' at all, several compilers marked Fortran
18441 main programs with DW_CC_program --- even when those
18442 functions use the standard calling conventions.
18444 Although DWARF now specifies a way to provide this
18445 information, we support this practice for backward
18447 if (DW_UNSND (&attr
) == DW_CC_program
18448 && cu
->language
== language_fortran
)
18449 main_subprogram
= 1;
18452 if (DW_UNSND (&attr
) == DW_INL_inlined
18453 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18454 may_be_inlined
= 1;
18458 if (tag
== DW_TAG_imported_unit
)
18460 d
.sect_off
= attr
.get_ref_die_offset ();
18461 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18462 || cu
->per_cu
->is_dwz
);
18466 case DW_AT_main_subprogram
:
18467 main_subprogram
= DW_UNSND (&attr
);
18472 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18473 but that requires a full DIE, so instead we just
18475 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18476 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18477 + (need_ranges_base
18481 /* Value of the DW_AT_ranges attribute is the offset in the
18482 .debug_ranges section. */
18483 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18494 /* For Ada, if both the name and the linkage name appear, we prefer
18495 the latter. This lets "catch exception" work better, regardless
18496 of the order in which the name and linkage name were emitted.
18497 Really, though, this is just a workaround for the fact that gdb
18498 doesn't store both the name and the linkage name. */
18499 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18500 name
= linkage_name
;
18502 if (high_pc_relative
)
18505 if (has_low_pc_attr
&& has_high_pc_attr
)
18507 /* When using the GNU linker, .gnu.linkonce. sections are used to
18508 eliminate duplicate copies of functions and vtables and such.
18509 The linker will arbitrarily choose one and discard the others.
18510 The AT_*_pc values for such functions refer to local labels in
18511 these sections. If the section from that file was discarded, the
18512 labels are not in the output, so the relocs get a value of 0.
18513 If this is a discarded function, mark the pc bounds as invalid,
18514 so that GDB will ignore it. */
18515 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18517 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18518 struct gdbarch
*gdbarch
= objfile
->arch ();
18520 complaint (_("DW_AT_low_pc %s is zero "
18521 "for DIE at %s [in module %s]"),
18522 paddress (gdbarch
, lowpc
),
18523 sect_offset_str (sect_off
),
18524 objfile_name (objfile
));
18526 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18527 else if (lowpc
>= highpc
)
18529 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18530 struct gdbarch
*gdbarch
= objfile
->arch ();
18532 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18533 "for DIE at %s [in module %s]"),
18534 paddress (gdbarch
, lowpc
),
18535 paddress (gdbarch
, highpc
),
18536 sect_offset_str (sect_off
),
18537 objfile_name (objfile
));
18546 /* Find a cached partial DIE at OFFSET in CU. */
18548 struct partial_die_info
*
18549 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18551 struct partial_die_info
*lookup_die
= NULL
;
18552 struct partial_die_info
part_die (sect_off
);
18554 lookup_die
= ((struct partial_die_info
*)
18555 htab_find_with_hash (partial_dies
, &part_die
,
18556 to_underlying (sect_off
)));
18561 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18562 except in the case of .debug_types DIEs which do not reference
18563 outside their CU (they do however referencing other types via
18564 DW_FORM_ref_sig8). */
18566 static const struct cu_partial_die_info
18567 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18569 struct dwarf2_per_objfile
*dwarf2_per_objfile
18570 = cu
->per_cu
->dwarf2_per_objfile
;
18571 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18572 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18573 struct partial_die_info
*pd
= NULL
;
18575 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18576 && cu
->header
.offset_in_cu_p (sect_off
))
18578 pd
= cu
->find_partial_die (sect_off
);
18581 /* We missed recording what we needed.
18582 Load all dies and try again. */
18583 per_cu
= cu
->per_cu
;
18587 /* TUs don't reference other CUs/TUs (except via type signatures). */
18588 if (cu
->per_cu
->is_debug_types
)
18590 error (_("Dwarf Error: Type Unit at offset %s contains"
18591 " external reference to offset %s [in module %s].\n"),
18592 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18593 bfd_get_filename (objfile
->obfd
));
18595 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18596 dwarf2_per_objfile
);
18598 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18599 load_partial_comp_unit (per_cu
);
18601 per_cu
->cu
->last_used
= 0;
18602 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18605 /* If we didn't find it, and not all dies have been loaded,
18606 load them all and try again. */
18608 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18610 per_cu
->load_all_dies
= 1;
18612 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18613 THIS_CU->cu may already be in use. So we can't just free it and
18614 replace its DIEs with the ones we read in. Instead, we leave those
18615 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18616 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18618 load_partial_comp_unit (per_cu
);
18620 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18624 internal_error (__FILE__
, __LINE__
,
18625 _("could not find partial DIE %s "
18626 "in cache [from module %s]\n"),
18627 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18628 return { per_cu
->cu
, pd
};
18631 /* See if we can figure out if the class lives in a namespace. We do
18632 this by looking for a member function; its demangled name will
18633 contain namespace info, if there is any. */
18636 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18637 struct dwarf2_cu
*cu
)
18639 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18640 what template types look like, because the demangler
18641 frequently doesn't give the same name as the debug info. We
18642 could fix this by only using the demangled name to get the
18643 prefix (but see comment in read_structure_type). */
18645 struct partial_die_info
*real_pdi
;
18646 struct partial_die_info
*child_pdi
;
18648 /* If this DIE (this DIE's specification, if any) has a parent, then
18649 we should not do this. We'll prepend the parent's fully qualified
18650 name when we create the partial symbol. */
18652 real_pdi
= struct_pdi
;
18653 while (real_pdi
->has_specification
)
18655 auto res
= find_partial_die (real_pdi
->spec_offset
,
18656 real_pdi
->spec_is_dwz
, cu
);
18657 real_pdi
= res
.pdi
;
18661 if (real_pdi
->die_parent
!= NULL
)
18664 for (child_pdi
= struct_pdi
->die_child
;
18666 child_pdi
= child_pdi
->die_sibling
)
18668 if (child_pdi
->tag
== DW_TAG_subprogram
18669 && child_pdi
->linkage_name
!= NULL
)
18671 gdb::unique_xmalloc_ptr
<char> actual_class_name
18672 (language_class_name_from_physname (cu
->language_defn
,
18673 child_pdi
->linkage_name
));
18674 if (actual_class_name
!= NULL
)
18676 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18677 struct_pdi
->name
= objfile
->intern (actual_class_name
.get ());
18684 /* Return true if a DIE with TAG may have the DW_AT_const_value
18688 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
18692 case DW_TAG_constant
:
18693 case DW_TAG_enumerator
:
18694 case DW_TAG_formal_parameter
:
18695 case DW_TAG_template_value_param
:
18696 case DW_TAG_variable
:
18704 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18706 /* Once we've fixed up a die, there's no point in doing so again.
18707 This also avoids a memory leak if we were to call
18708 guess_partial_die_structure_name multiple times. */
18712 /* If we found a reference attribute and the DIE has no name, try
18713 to find a name in the referred to DIE. */
18715 if (name
== NULL
&& has_specification
)
18717 struct partial_die_info
*spec_die
;
18719 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18720 spec_die
= res
.pdi
;
18723 spec_die
->fixup (cu
);
18725 if (spec_die
->name
)
18727 name
= spec_die
->name
;
18729 /* Copy DW_AT_external attribute if it is set. */
18730 if (spec_die
->is_external
)
18731 is_external
= spec_die
->is_external
;
18735 if (!has_const_value
&& has_specification
18736 && can_have_DW_AT_const_value_p (tag
))
18738 struct partial_die_info
*spec_die
;
18740 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18741 spec_die
= res
.pdi
;
18744 spec_die
->fixup (cu
);
18746 if (spec_die
->has_const_value
)
18748 /* Copy DW_AT_const_value attribute if it is set. */
18749 has_const_value
= spec_die
->has_const_value
;
18753 /* Set default names for some unnamed DIEs. */
18755 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18756 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18758 /* If there is no parent die to provide a namespace, and there are
18759 children, see if we can determine the namespace from their linkage
18761 if (cu
->language
== language_cplus
18762 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
18763 && die_parent
== NULL
18765 && (tag
== DW_TAG_class_type
18766 || tag
== DW_TAG_structure_type
18767 || tag
== DW_TAG_union_type
))
18768 guess_partial_die_structure_name (this, cu
);
18770 /* GCC might emit a nameless struct or union that has a linkage
18771 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18773 && (tag
== DW_TAG_class_type
18774 || tag
== DW_TAG_interface_type
18775 || tag
== DW_TAG_structure_type
18776 || tag
== DW_TAG_union_type
)
18777 && linkage_name
!= NULL
)
18779 gdb::unique_xmalloc_ptr
<char> demangled
18780 (gdb_demangle (linkage_name
, DMGL_TYPES
));
18781 if (demangled
!= nullptr)
18785 /* Strip any leading namespaces/classes, keep only the base name.
18786 DW_AT_name for named DIEs does not contain the prefixes. */
18787 base
= strrchr (demangled
.get (), ':');
18788 if (base
&& base
> demangled
.get () && base
[-1] == ':')
18791 base
= demangled
.get ();
18793 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18794 name
= objfile
->intern (base
);
18801 /* Read the .debug_loclists header contents from the given SECTION in the
18804 read_loclist_header (struct loclist_header
*header
,
18805 struct dwarf2_section_info
*section
)
18807 unsigned int bytes_read
;
18808 bfd
*abfd
= section
->get_bfd_owner ();
18809 const gdb_byte
*info_ptr
= section
->buffer
;
18810 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
18811 info_ptr
+= bytes_read
;
18812 header
->version
= read_2_bytes (abfd
, info_ptr
);
18814 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
18816 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
18818 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
18821 /* Return the DW_AT_loclists_base value for the CU. */
18823 lookup_loclist_base (struct dwarf2_cu
*cu
)
18825 /* For the .dwo unit, the loclist_base points to the first offset following
18826 the header. The header consists of the following entities-
18827 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
18829 2. version (2 bytes)
18830 3. address size (1 byte)
18831 4. segment selector size (1 byte)
18832 5. offset entry count (4 bytes)
18833 These sizes are derived as per the DWARFv5 standard. */
18834 if (cu
->dwo_unit
!= nullptr)
18836 if (cu
->header
.initial_length_size
== 4)
18837 return LOCLIST_HEADER_SIZE32
;
18838 return LOCLIST_HEADER_SIZE64
;
18840 return cu
->loclist_base
;
18843 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
18844 array of offsets in the .debug_loclists section. */
18846 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
18848 struct dwarf2_per_objfile
*dwarf2_per_objfile
18849 = cu
->per_cu
->dwarf2_per_objfile
;
18850 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18851 bfd
*abfd
= objfile
->obfd
;
18852 ULONGEST loclist_base
= lookup_loclist_base (cu
);
18853 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18855 section
->read (objfile
);
18856 if (section
->buffer
== NULL
)
18857 complaint (_("DW_FORM_loclistx used without .debug_loclists "
18858 "section [in module %s]"), objfile_name (objfile
));
18859 struct loclist_header header
;
18860 read_loclist_header (&header
, section
);
18861 if (loclist_index
>= header
.offset_entry_count
)
18862 complaint (_("DW_FORM_loclistx pointing outside of "
18863 ".debug_loclists offset array [in module %s]"),
18864 objfile_name (objfile
));
18865 if (loclist_base
+ loclist_index
* cu
->header
.offset_size
18867 complaint (_("DW_FORM_loclistx pointing outside of "
18868 ".debug_loclists section [in module %s]"),
18869 objfile_name (objfile
));
18870 const gdb_byte
*info_ptr
18871 = section
->buffer
+ loclist_base
+ loclist_index
* cu
->header
.offset_size
;
18873 if (cu
->header
.offset_size
== 4)
18874 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
18876 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
18879 /* Process the attributes that had to be skipped in the first round. These
18880 attributes are the ones that need str_offsets_base or addr_base attributes.
18881 They could not have been processed in the first round, because at the time
18882 the values of str_offsets_base or addr_base may not have been known. */
18884 read_attribute_reprocess (const struct die_reader_specs
*reader
,
18885 struct attribute
*attr
)
18887 struct dwarf2_cu
*cu
= reader
->cu
;
18888 switch (attr
->form
)
18890 case DW_FORM_addrx
:
18891 case DW_FORM_GNU_addr_index
:
18892 DW_ADDR (attr
) = read_addr_index (cu
, DW_UNSND (attr
));
18894 case DW_FORM_loclistx
:
18895 DW_UNSND (attr
) = read_loclist_index (cu
, DW_UNSND (attr
));
18898 case DW_FORM_strx1
:
18899 case DW_FORM_strx2
:
18900 case DW_FORM_strx3
:
18901 case DW_FORM_strx4
:
18902 case DW_FORM_GNU_str_index
:
18904 unsigned int str_index
= DW_UNSND (attr
);
18905 if (reader
->dwo_file
!= NULL
)
18907 DW_STRING (attr
) = read_dwo_str_index (reader
, str_index
);
18908 DW_STRING_IS_CANONICAL (attr
) = 0;
18912 DW_STRING (attr
) = read_stub_str_index (cu
, str_index
);
18913 DW_STRING_IS_CANONICAL (attr
) = 0;
18918 gdb_assert_not_reached (_("Unexpected DWARF form."));
18922 /* Read an attribute value described by an attribute form. */
18924 static const gdb_byte
*
18925 read_attribute_value (const struct die_reader_specs
*reader
,
18926 struct attribute
*attr
, unsigned form
,
18927 LONGEST implicit_const
, const gdb_byte
*info_ptr
,
18928 bool *need_reprocess
)
18930 struct dwarf2_cu
*cu
= reader
->cu
;
18931 struct dwarf2_per_objfile
*dwarf2_per_objfile
18932 = cu
->per_cu
->dwarf2_per_objfile
;
18933 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18934 bfd
*abfd
= reader
->abfd
;
18935 struct comp_unit_head
*cu_header
= &cu
->header
;
18936 unsigned int bytes_read
;
18937 struct dwarf_block
*blk
;
18938 *need_reprocess
= false;
18940 attr
->form
= (enum dwarf_form
) form
;
18943 case DW_FORM_ref_addr
:
18944 if (cu
->header
.version
== 2)
18945 DW_UNSND (attr
) = cu
->header
.read_address (abfd
, info_ptr
,
18948 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
,
18950 info_ptr
+= bytes_read
;
18952 case DW_FORM_GNU_ref_alt
:
18953 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
18954 info_ptr
+= bytes_read
;
18958 struct gdbarch
*gdbarch
= objfile
->arch ();
18959 DW_ADDR (attr
) = cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
18960 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18961 info_ptr
+= bytes_read
;
18964 case DW_FORM_block2
:
18965 blk
= dwarf_alloc_block (cu
);
18966 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18968 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18969 info_ptr
+= blk
->size
;
18970 DW_BLOCK (attr
) = blk
;
18972 case DW_FORM_block4
:
18973 blk
= dwarf_alloc_block (cu
);
18974 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18976 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18977 info_ptr
+= blk
->size
;
18978 DW_BLOCK (attr
) = blk
;
18980 case DW_FORM_data2
:
18981 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18984 case DW_FORM_data4
:
18985 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18988 case DW_FORM_data8
:
18989 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18992 case DW_FORM_data16
:
18993 blk
= dwarf_alloc_block (cu
);
18995 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18997 DW_BLOCK (attr
) = blk
;
18999 case DW_FORM_sec_offset
:
19000 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
19001 info_ptr
+= bytes_read
;
19003 case DW_FORM_loclistx
:
19005 *need_reprocess
= true;
19006 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19007 info_ptr
+= bytes_read
;
19010 case DW_FORM_string
:
19011 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19012 DW_STRING_IS_CANONICAL (attr
) = 0;
19013 info_ptr
+= bytes_read
;
19016 if (!cu
->per_cu
->is_dwz
)
19018 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19019 abfd
, info_ptr
, cu_header
,
19021 DW_STRING_IS_CANONICAL (attr
) = 0;
19022 info_ptr
+= bytes_read
;
19026 case DW_FORM_line_strp
:
19027 if (!cu
->per_cu
->is_dwz
)
19030 = dwarf2_per_objfile
->read_line_string (info_ptr
, cu_header
,
19032 DW_STRING_IS_CANONICAL (attr
) = 0;
19033 info_ptr
+= bytes_read
;
19037 case DW_FORM_GNU_strp_alt
:
19039 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19040 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
19043 DW_STRING (attr
) = dwz
->read_string (objfile
, str_offset
);
19044 DW_STRING_IS_CANONICAL (attr
) = 0;
19045 info_ptr
+= bytes_read
;
19048 case DW_FORM_exprloc
:
19049 case DW_FORM_block
:
19050 blk
= dwarf_alloc_block (cu
);
19051 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19052 info_ptr
+= bytes_read
;
19053 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19054 info_ptr
+= blk
->size
;
19055 DW_BLOCK (attr
) = blk
;
19057 case DW_FORM_block1
:
19058 blk
= dwarf_alloc_block (cu
);
19059 blk
->size
= read_1_byte (abfd
, info_ptr
);
19061 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19062 info_ptr
+= blk
->size
;
19063 DW_BLOCK (attr
) = blk
;
19065 case DW_FORM_data1
:
19066 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19070 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19073 case DW_FORM_flag_present
:
19074 DW_UNSND (attr
) = 1;
19076 case DW_FORM_sdata
:
19077 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19078 info_ptr
+= bytes_read
;
19080 case DW_FORM_udata
:
19081 case DW_FORM_rnglistx
:
19082 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19083 info_ptr
+= bytes_read
;
19086 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19087 + read_1_byte (abfd
, info_ptr
));
19091 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19092 + read_2_bytes (abfd
, info_ptr
));
19096 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19097 + read_4_bytes (abfd
, info_ptr
));
19101 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19102 + read_8_bytes (abfd
, info_ptr
));
19105 case DW_FORM_ref_sig8
:
19106 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19109 case DW_FORM_ref_udata
:
19110 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19111 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19112 info_ptr
+= bytes_read
;
19114 case DW_FORM_indirect
:
19115 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19116 info_ptr
+= bytes_read
;
19117 if (form
== DW_FORM_implicit_const
)
19119 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19120 info_ptr
+= bytes_read
;
19122 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19123 info_ptr
, need_reprocess
);
19125 case DW_FORM_implicit_const
:
19126 DW_SND (attr
) = implicit_const
;
19128 case DW_FORM_addrx
:
19129 case DW_FORM_GNU_addr_index
:
19130 *need_reprocess
= true;
19131 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19132 info_ptr
+= bytes_read
;
19135 case DW_FORM_strx1
:
19136 case DW_FORM_strx2
:
19137 case DW_FORM_strx3
:
19138 case DW_FORM_strx4
:
19139 case DW_FORM_GNU_str_index
:
19141 ULONGEST str_index
;
19142 if (form
== DW_FORM_strx1
)
19144 str_index
= read_1_byte (abfd
, info_ptr
);
19147 else if (form
== DW_FORM_strx2
)
19149 str_index
= read_2_bytes (abfd
, info_ptr
);
19152 else if (form
== DW_FORM_strx3
)
19154 str_index
= read_3_bytes (abfd
, info_ptr
);
19157 else if (form
== DW_FORM_strx4
)
19159 str_index
= read_4_bytes (abfd
, info_ptr
);
19164 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19165 info_ptr
+= bytes_read
;
19167 *need_reprocess
= true;
19168 DW_UNSND (attr
) = str_index
;
19172 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19173 dwarf_form_name (form
),
19174 bfd_get_filename (abfd
));
19178 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
19179 attr
->form
= DW_FORM_GNU_ref_alt
;
19181 /* We have seen instances where the compiler tried to emit a byte
19182 size attribute of -1 which ended up being encoded as an unsigned
19183 0xffffffff. Although 0xffffffff is technically a valid size value,
19184 an object of this size seems pretty unlikely so we can relatively
19185 safely treat these cases as if the size attribute was invalid and
19186 treat them as zero by default. */
19187 if (attr
->name
== DW_AT_byte_size
19188 && form
== DW_FORM_data4
19189 && DW_UNSND (attr
) >= 0xffffffff)
19192 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19193 hex_string (DW_UNSND (attr
)));
19194 DW_UNSND (attr
) = 0;
19200 /* Read an attribute described by an abbreviated attribute. */
19202 static const gdb_byte
*
19203 read_attribute (const struct die_reader_specs
*reader
,
19204 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19205 const gdb_byte
*info_ptr
, bool *need_reprocess
)
19207 attr
->name
= abbrev
->name
;
19208 return read_attribute_value (reader
, attr
, abbrev
->form
,
19209 abbrev
->implicit_const
, info_ptr
,
19213 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19215 static const char *
19216 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19217 LONGEST str_offset
)
19219 return dwarf2_per_objfile
->str
.read_string (dwarf2_per_objfile
->objfile
,
19220 str_offset
, "DW_FORM_strp");
19223 /* Return pointer to string at .debug_str offset as read from BUF.
19224 BUF is assumed to be in a compilation unit described by CU_HEADER.
19225 Return *BYTES_READ_PTR count of bytes read from BUF. */
19227 static const char *
19228 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19229 const gdb_byte
*buf
,
19230 const struct comp_unit_head
*cu_header
,
19231 unsigned int *bytes_read_ptr
)
19233 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19235 return read_indirect_string_at_offset (dwarf2_per_objfile
, str_offset
);
19241 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
19242 const struct comp_unit_head
*cu_header
,
19243 unsigned int *bytes_read_ptr
)
19245 bfd
*abfd
= objfile
->obfd
;
19246 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19248 return line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
19251 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19252 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
19253 ADDR_SIZE is the size of addresses from the CU header. */
19256 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19257 unsigned int addr_index
, gdb::optional
<ULONGEST
> addr_base
,
19260 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19261 bfd
*abfd
= objfile
->obfd
;
19262 const gdb_byte
*info_ptr
;
19263 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
19265 dwarf2_per_objfile
->addr
.read (objfile
);
19266 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19267 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19268 objfile_name (objfile
));
19269 if (addr_base_or_zero
+ addr_index
* addr_size
19270 >= dwarf2_per_objfile
->addr
.size
)
19271 error (_("DW_FORM_addr_index pointing outside of "
19272 ".debug_addr section [in module %s]"),
19273 objfile_name (objfile
));
19274 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19275 + addr_base_or_zero
+ addr_index
* addr_size
);
19276 if (addr_size
== 4)
19277 return bfd_get_32 (abfd
, info_ptr
);
19279 return bfd_get_64 (abfd
, info_ptr
);
19282 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19285 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19287 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19288 cu
->addr_base
, cu
->header
.addr_size
);
19291 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19294 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19295 unsigned int *bytes_read
)
19297 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19298 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19300 return read_addr_index (cu
, addr_index
);
19306 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
, unsigned int addr_index
)
19308 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19309 struct dwarf2_cu
*cu
= per_cu
->cu
;
19310 gdb::optional
<ULONGEST
> addr_base
;
19313 /* We need addr_base and addr_size.
19314 If we don't have PER_CU->cu, we have to get it.
19315 Nasty, but the alternative is storing the needed info in PER_CU,
19316 which at this point doesn't seem justified: it's not clear how frequently
19317 it would get used and it would increase the size of every PER_CU.
19318 Entry points like dwarf2_per_cu_addr_size do a similar thing
19319 so we're not in uncharted territory here.
19320 Alas we need to be a bit more complicated as addr_base is contained
19323 We don't need to read the entire CU(/TU).
19324 We just need the header and top level die.
19326 IWBN to use the aging mechanism to let us lazily later discard the CU.
19327 For now we skip this optimization. */
19331 addr_base
= cu
->addr_base
;
19332 addr_size
= cu
->header
.addr_size
;
19336 cutu_reader
reader (per_cu
, NULL
, 0, false);
19337 addr_base
= reader
.cu
->addr_base
;
19338 addr_size
= reader
.cu
->header
.addr_size
;
19341 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19345 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
19346 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
19349 static const char *
19350 read_str_index (struct dwarf2_cu
*cu
,
19351 struct dwarf2_section_info
*str_section
,
19352 struct dwarf2_section_info
*str_offsets_section
,
19353 ULONGEST str_offsets_base
, ULONGEST str_index
)
19355 struct dwarf2_per_objfile
*dwarf2_per_objfile
19356 = cu
->per_cu
->dwarf2_per_objfile
;
19357 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19358 const char *objf_name
= objfile_name (objfile
);
19359 bfd
*abfd
= objfile
->obfd
;
19360 const gdb_byte
*info_ptr
;
19361 ULONGEST str_offset
;
19362 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19364 str_section
->read (objfile
);
19365 str_offsets_section
->read (objfile
);
19366 if (str_section
->buffer
== NULL
)
19367 error (_("%s used without %s section"
19368 " in CU at offset %s [in module %s]"),
19369 form_name
, str_section
->get_name (),
19370 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19371 if (str_offsets_section
->buffer
== NULL
)
19372 error (_("%s used without %s section"
19373 " in CU at offset %s [in module %s]"),
19374 form_name
, str_section
->get_name (),
19375 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19376 info_ptr
= (str_offsets_section
->buffer
19378 + str_index
* cu
->header
.offset_size
);
19379 if (cu
->header
.offset_size
== 4)
19380 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19382 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19383 if (str_offset
>= str_section
->size
)
19384 error (_("Offset from %s pointing outside of"
19385 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19386 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19387 return (const char *) (str_section
->buffer
+ str_offset
);
19390 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
19392 static const char *
19393 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19395 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
19396 ? reader
->cu
->header
.addr_size
: 0;
19397 return read_str_index (reader
->cu
,
19398 &reader
->dwo_file
->sections
.str
,
19399 &reader
->dwo_file
->sections
.str_offsets
,
19400 str_offsets_base
, str_index
);
19403 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
19405 static const char *
19406 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
19408 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19409 const char *objf_name
= objfile_name (objfile
);
19410 static const char form_name
[] = "DW_FORM_GNU_str_index";
19411 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
19413 if (!cu
->str_offsets_base
.has_value ())
19414 error (_("%s used in Fission stub without %s"
19415 " in CU at offset 0x%lx [in module %s]"),
19416 form_name
, str_offsets_attr_name
,
19417 (long) cu
->header
.offset_size
, objf_name
);
19419 return read_str_index (cu
,
19420 &cu
->per_cu
->dwarf2_per_objfile
->str
,
19421 &cu
->per_cu
->dwarf2_per_objfile
->str_offsets
,
19422 *cu
->str_offsets_base
, str_index
);
19425 /* Return the length of an LEB128 number in BUF. */
19428 leb128_size (const gdb_byte
*buf
)
19430 const gdb_byte
*begin
= buf
;
19436 if ((byte
& 128) == 0)
19437 return buf
- begin
;
19442 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19451 cu
->language
= language_c
;
19454 case DW_LANG_C_plus_plus
:
19455 case DW_LANG_C_plus_plus_11
:
19456 case DW_LANG_C_plus_plus_14
:
19457 cu
->language
= language_cplus
;
19460 cu
->language
= language_d
;
19462 case DW_LANG_Fortran77
:
19463 case DW_LANG_Fortran90
:
19464 case DW_LANG_Fortran95
:
19465 case DW_LANG_Fortran03
:
19466 case DW_LANG_Fortran08
:
19467 cu
->language
= language_fortran
;
19470 cu
->language
= language_go
;
19472 case DW_LANG_Mips_Assembler
:
19473 cu
->language
= language_asm
;
19475 case DW_LANG_Ada83
:
19476 case DW_LANG_Ada95
:
19477 cu
->language
= language_ada
;
19479 case DW_LANG_Modula2
:
19480 cu
->language
= language_m2
;
19482 case DW_LANG_Pascal83
:
19483 cu
->language
= language_pascal
;
19486 cu
->language
= language_objc
;
19489 case DW_LANG_Rust_old
:
19490 cu
->language
= language_rust
;
19492 case DW_LANG_Cobol74
:
19493 case DW_LANG_Cobol85
:
19495 cu
->language
= language_minimal
;
19498 cu
->language_defn
= language_def (cu
->language
);
19501 /* Return the named attribute or NULL if not there. */
19503 static struct attribute
*
19504 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19509 struct attribute
*spec
= NULL
;
19511 for (i
= 0; i
< die
->num_attrs
; ++i
)
19513 if (die
->attrs
[i
].name
== name
)
19514 return &die
->attrs
[i
];
19515 if (die
->attrs
[i
].name
== DW_AT_specification
19516 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19517 spec
= &die
->attrs
[i
];
19523 die
= follow_die_ref (die
, spec
, &cu
);
19529 /* Return the string associated with a string-typed attribute, or NULL if it
19530 is either not found or is of an incorrect type. */
19532 static const char *
19533 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19535 struct attribute
*attr
;
19536 const char *str
= NULL
;
19538 attr
= dwarf2_attr (die
, name
, cu
);
19542 str
= attr
->value_as_string ();
19543 if (str
== nullptr)
19544 complaint (_("string type expected for attribute %s for "
19545 "DIE at %s in module %s"),
19546 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19547 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19553 /* Return the dwo name or NULL if not present. If present, it is in either
19554 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
19555 static const char *
19556 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19558 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
19559 if (dwo_name
== nullptr)
19560 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
19564 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19565 and holds a non-zero value. This function should only be used for
19566 DW_FORM_flag or DW_FORM_flag_present attributes. */
19569 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19571 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19573 return (attr
&& DW_UNSND (attr
));
19577 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19579 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19580 which value is non-zero. However, we have to be careful with
19581 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19582 (via dwarf2_flag_true_p) follows this attribute. So we may
19583 end up accidently finding a declaration attribute that belongs
19584 to a different DIE referenced by the specification attribute,
19585 even though the given DIE does not have a declaration attribute. */
19586 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19587 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19590 /* Return the die giving the specification for DIE, if there is
19591 one. *SPEC_CU is the CU containing DIE on input, and the CU
19592 containing the return value on output. If there is no
19593 specification, but there is an abstract origin, that is
19596 static struct die_info
*
19597 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19599 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19602 if (spec_attr
== NULL
)
19603 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19605 if (spec_attr
== NULL
)
19608 return follow_die_ref (die
, spec_attr
, spec_cu
);
19611 /* Stub for free_line_header to match void * callback types. */
19614 free_line_header_voidp (void *arg
)
19616 struct line_header
*lh
= (struct line_header
*) arg
;
19621 /* A convenience function to find the proper .debug_line section for a CU. */
19623 static struct dwarf2_section_info
*
19624 get_debug_line_section (struct dwarf2_cu
*cu
)
19626 struct dwarf2_section_info
*section
;
19627 struct dwarf2_per_objfile
*dwarf2_per_objfile
19628 = cu
->per_cu
->dwarf2_per_objfile
;
19630 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19632 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19633 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19634 else if (cu
->per_cu
->is_dwz
)
19636 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19638 section
= &dwz
->line
;
19641 section
= &dwarf2_per_objfile
->line
;
19646 /* Read the statement program header starting at OFFSET in
19647 .debug_line, or .debug_line.dwo. Return a pointer
19648 to a struct line_header, allocated using xmalloc.
19649 Returns NULL if there is a problem reading the header, e.g., if it
19650 has a version we don't understand.
19652 NOTE: the strings in the include directory and file name tables of
19653 the returned object point into the dwarf line section buffer,
19654 and must not be freed. */
19656 static line_header_up
19657 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
19659 struct dwarf2_section_info
*section
;
19660 struct dwarf2_per_objfile
*dwarf2_per_objfile
19661 = cu
->per_cu
->dwarf2_per_objfile
;
19663 section
= get_debug_line_section (cu
);
19664 section
->read (dwarf2_per_objfile
->objfile
);
19665 if (section
->buffer
== NULL
)
19667 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19668 complaint (_("missing .debug_line.dwo section"));
19670 complaint (_("missing .debug_line section"));
19674 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
19675 dwarf2_per_objfile
, section
,
19679 /* Subroutine of dwarf_decode_lines to simplify it.
19680 Return the file name of the psymtab for the given file_entry.
19681 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19682 If space for the result is malloc'd, *NAME_HOLDER will be set.
19683 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
19685 static const char *
19686 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
19687 const dwarf2_psymtab
*pst
,
19688 const char *comp_dir
,
19689 gdb::unique_xmalloc_ptr
<char> *name_holder
)
19691 const char *include_name
= fe
.name
;
19692 const char *include_name_to_compare
= include_name
;
19693 const char *pst_filename
;
19696 const char *dir_name
= fe
.include_dir (lh
);
19698 gdb::unique_xmalloc_ptr
<char> hold_compare
;
19699 if (!IS_ABSOLUTE_PATH (include_name
)
19700 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
19702 /* Avoid creating a duplicate psymtab for PST.
19703 We do this by comparing INCLUDE_NAME and PST_FILENAME.
19704 Before we do the comparison, however, we need to account
19705 for DIR_NAME and COMP_DIR.
19706 First prepend dir_name (if non-NULL). If we still don't
19707 have an absolute path prepend comp_dir (if non-NULL).
19708 However, the directory we record in the include-file's
19709 psymtab does not contain COMP_DIR (to match the
19710 corresponding symtab(s)).
19715 bash$ gcc -g ./hello.c
19716 include_name = "hello.c"
19718 DW_AT_comp_dir = comp_dir = "/tmp"
19719 DW_AT_name = "./hello.c"
19723 if (dir_name
!= NULL
)
19725 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
19726 include_name
, (char *) NULL
));
19727 include_name
= name_holder
->get ();
19728 include_name_to_compare
= include_name
;
19730 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
19732 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
19733 include_name
, (char *) NULL
));
19734 include_name_to_compare
= hold_compare
.get ();
19738 pst_filename
= pst
->filename
;
19739 gdb::unique_xmalloc_ptr
<char> copied_name
;
19740 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
19742 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
19743 pst_filename
, (char *) NULL
));
19744 pst_filename
= copied_name
.get ();
19747 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
19751 return include_name
;
19754 /* State machine to track the state of the line number program. */
19756 class lnp_state_machine
19759 /* Initialize a machine state for the start of a line number
19761 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
19762 bool record_lines_p
);
19764 file_entry
*current_file ()
19766 /* lh->file_names is 0-based, but the file name numbers in the
19767 statement program are 1-based. */
19768 return m_line_header
->file_name_at (m_file
);
19771 /* Record the line in the state machine. END_SEQUENCE is true if
19772 we're processing the end of a sequence. */
19773 void record_line (bool end_sequence
);
19775 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
19776 nop-out rest of the lines in this sequence. */
19777 void check_line_address (struct dwarf2_cu
*cu
,
19778 const gdb_byte
*line_ptr
,
19779 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
19781 void handle_set_discriminator (unsigned int discriminator
)
19783 m_discriminator
= discriminator
;
19784 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
19787 /* Handle DW_LNE_set_address. */
19788 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
19791 address
+= baseaddr
;
19792 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
19795 /* Handle DW_LNS_advance_pc. */
19796 void handle_advance_pc (CORE_ADDR adjust
);
19798 /* Handle a special opcode. */
19799 void handle_special_opcode (unsigned char op_code
);
19801 /* Handle DW_LNS_advance_line. */
19802 void handle_advance_line (int line_delta
)
19804 advance_line (line_delta
);
19807 /* Handle DW_LNS_set_file. */
19808 void handle_set_file (file_name_index file
);
19810 /* Handle DW_LNS_negate_stmt. */
19811 void handle_negate_stmt ()
19813 m_is_stmt
= !m_is_stmt
;
19816 /* Handle DW_LNS_const_add_pc. */
19817 void handle_const_add_pc ();
19819 /* Handle DW_LNS_fixed_advance_pc. */
19820 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
19822 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19826 /* Handle DW_LNS_copy. */
19827 void handle_copy ()
19829 record_line (false);
19830 m_discriminator
= 0;
19833 /* Handle DW_LNE_end_sequence. */
19834 void handle_end_sequence ()
19836 m_currently_recording_lines
= true;
19840 /* Advance the line by LINE_DELTA. */
19841 void advance_line (int line_delta
)
19843 m_line
+= line_delta
;
19845 if (line_delta
!= 0)
19846 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19849 struct dwarf2_cu
*m_cu
;
19851 gdbarch
*m_gdbarch
;
19853 /* True if we're recording lines.
19854 Otherwise we're building partial symtabs and are just interested in
19855 finding include files mentioned by the line number program. */
19856 bool m_record_lines_p
;
19858 /* The line number header. */
19859 line_header
*m_line_header
;
19861 /* These are part of the standard DWARF line number state machine,
19862 and initialized according to the DWARF spec. */
19864 unsigned char m_op_index
= 0;
19865 /* The line table index of the current file. */
19866 file_name_index m_file
= 1;
19867 unsigned int m_line
= 1;
19869 /* These are initialized in the constructor. */
19871 CORE_ADDR m_address
;
19873 unsigned int m_discriminator
;
19875 /* Additional bits of state we need to track. */
19877 /* The last file that we called dwarf2_start_subfile for.
19878 This is only used for TLLs. */
19879 unsigned int m_last_file
= 0;
19880 /* The last file a line number was recorded for. */
19881 struct subfile
*m_last_subfile
= NULL
;
19883 /* When true, record the lines we decode. */
19884 bool m_currently_recording_lines
= false;
19886 /* The last line number that was recorded, used to coalesce
19887 consecutive entries for the same line. This can happen, for
19888 example, when discriminators are present. PR 17276. */
19889 unsigned int m_last_line
= 0;
19890 bool m_line_has_non_zero_discriminator
= false;
19894 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
19896 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
19897 / m_line_header
->maximum_ops_per_instruction
)
19898 * m_line_header
->minimum_instruction_length
);
19899 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19900 m_op_index
= ((m_op_index
+ adjust
)
19901 % m_line_header
->maximum_ops_per_instruction
);
19905 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
19907 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
19908 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
19909 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
19910 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
19911 / m_line_header
->maximum_ops_per_instruction
)
19912 * m_line_header
->minimum_instruction_length
);
19913 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19914 m_op_index
= ((m_op_index
+ adj_opcode_d
)
19915 % m_line_header
->maximum_ops_per_instruction
);
19917 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
19918 advance_line (line_delta
);
19919 record_line (false);
19920 m_discriminator
= 0;
19924 lnp_state_machine::handle_set_file (file_name_index file
)
19928 const file_entry
*fe
= current_file ();
19930 dwarf2_debug_line_missing_file_complaint ();
19931 else if (m_record_lines_p
)
19933 const char *dir
= fe
->include_dir (m_line_header
);
19935 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
19936 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19937 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
19942 lnp_state_machine::handle_const_add_pc ()
19945 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
19948 = (((m_op_index
+ adjust
)
19949 / m_line_header
->maximum_ops_per_instruction
)
19950 * m_line_header
->minimum_instruction_length
);
19952 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19953 m_op_index
= ((m_op_index
+ adjust
)
19954 % m_line_header
->maximum_ops_per_instruction
);
19957 /* Return non-zero if we should add LINE to the line number table.
19958 LINE is the line to add, LAST_LINE is the last line that was added,
19959 LAST_SUBFILE is the subfile for LAST_LINE.
19960 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
19961 had a non-zero discriminator.
19963 We have to be careful in the presence of discriminators.
19964 E.g., for this line:
19966 for (i = 0; i < 100000; i++);
19968 clang can emit four line number entries for that one line,
19969 each with a different discriminator.
19970 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
19972 However, we want gdb to coalesce all four entries into one.
19973 Otherwise the user could stepi into the middle of the line and
19974 gdb would get confused about whether the pc really was in the
19975 middle of the line.
19977 Things are further complicated by the fact that two consecutive
19978 line number entries for the same line is a heuristic used by gcc
19979 to denote the end of the prologue. So we can't just discard duplicate
19980 entries, we have to be selective about it. The heuristic we use is
19981 that we only collapse consecutive entries for the same line if at least
19982 one of those entries has a non-zero discriminator. PR 17276.
19984 Note: Addresses in the line number state machine can never go backwards
19985 within one sequence, thus this coalescing is ok. */
19988 dwarf_record_line_p (struct dwarf2_cu
*cu
,
19989 unsigned int line
, unsigned int last_line
,
19990 int line_has_non_zero_discriminator
,
19991 struct subfile
*last_subfile
)
19993 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
19995 if (line
!= last_line
)
19997 /* Same line for the same file that we've seen already.
19998 As a last check, for pr 17276, only record the line if the line
19999 has never had a non-zero discriminator. */
20000 if (!line_has_non_zero_discriminator
)
20005 /* Use the CU's builder to record line number LINE beginning at
20006 address ADDRESS in the line table of subfile SUBFILE. */
20009 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20010 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
20011 struct dwarf2_cu
*cu
)
20013 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20015 if (dwarf_line_debug
)
20017 fprintf_unfiltered (gdb_stdlog
,
20018 "Recording line %u, file %s, address %s\n",
20019 line
, lbasename (subfile
->name
),
20020 paddress (gdbarch
, address
));
20024 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
20027 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20028 Mark the end of a set of line number records.
20029 The arguments are the same as for dwarf_record_line_1.
20030 If SUBFILE is NULL the request is ignored. */
20033 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20034 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20036 if (subfile
== NULL
)
20039 if (dwarf_line_debug
)
20041 fprintf_unfiltered (gdb_stdlog
,
20042 "Finishing current line, file %s, address %s\n",
20043 lbasename (subfile
->name
),
20044 paddress (gdbarch
, address
));
20047 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
20051 lnp_state_machine::record_line (bool end_sequence
)
20053 if (dwarf_line_debug
)
20055 fprintf_unfiltered (gdb_stdlog
,
20056 "Processing actual line %u: file %u,"
20057 " address %s, is_stmt %u, discrim %u%s\n",
20059 paddress (m_gdbarch
, m_address
),
20060 m_is_stmt
, m_discriminator
,
20061 (end_sequence
? "\t(end sequence)" : ""));
20064 file_entry
*fe
= current_file ();
20067 dwarf2_debug_line_missing_file_complaint ();
20068 /* For now we ignore lines not starting on an instruction boundary.
20069 But not when processing end_sequence for compatibility with the
20070 previous version of the code. */
20071 else if (m_op_index
== 0 || end_sequence
)
20073 fe
->included_p
= 1;
20074 if (m_record_lines_p
)
20076 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20079 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20080 m_currently_recording_lines
? m_cu
: nullptr);
20085 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
20087 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20088 m_line_has_non_zero_discriminator
,
20091 buildsym_compunit
*builder
= m_cu
->get_builder ();
20092 dwarf_record_line_1 (m_gdbarch
,
20093 builder
->get_current_subfile (),
20094 m_line
, m_address
, is_stmt
,
20095 m_currently_recording_lines
? m_cu
: nullptr);
20097 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20098 m_last_line
= m_line
;
20104 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20105 line_header
*lh
, bool record_lines_p
)
20109 m_record_lines_p
= record_lines_p
;
20110 m_line_header
= lh
;
20112 m_currently_recording_lines
= true;
20114 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20115 was a line entry for it so that the backend has a chance to adjust it
20116 and also record it in case it needs it. This is currently used by MIPS
20117 code, cf. `mips_adjust_dwarf2_line'. */
20118 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20119 m_is_stmt
= lh
->default_is_stmt
;
20120 m_discriminator
= 0;
20124 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20125 const gdb_byte
*line_ptr
,
20126 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20128 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20129 the pc range of the CU. However, we restrict the test to only ADDRESS
20130 values of zero to preserve GDB's previous behaviour which is to handle
20131 the specific case of a function being GC'd by the linker. */
20133 if (address
== 0 && address
< unrelocated_lowpc
)
20135 /* This line table is for a function which has been
20136 GCd by the linker. Ignore it. PR gdb/12528 */
20138 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20139 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20141 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20142 line_offset
, objfile_name (objfile
));
20143 m_currently_recording_lines
= false;
20144 /* Note: m_currently_recording_lines is left as false until we see
20145 DW_LNE_end_sequence. */
20149 /* Subroutine of dwarf_decode_lines to simplify it.
20150 Process the line number information in LH.
20151 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20152 program in order to set included_p for every referenced header. */
20155 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20156 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20158 const gdb_byte
*line_ptr
, *extended_end
;
20159 const gdb_byte
*line_end
;
20160 unsigned int bytes_read
, extended_len
;
20161 unsigned char op_code
, extended_op
;
20162 CORE_ADDR baseaddr
;
20163 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20164 bfd
*abfd
= objfile
->obfd
;
20165 struct gdbarch
*gdbarch
= objfile
->arch ();
20166 /* True if we're recording line info (as opposed to building partial
20167 symtabs and just interested in finding include files mentioned by
20168 the line number program). */
20169 bool record_lines_p
= !decode_for_pst_p
;
20171 baseaddr
= objfile
->text_section_offset ();
20173 line_ptr
= lh
->statement_program_start
;
20174 line_end
= lh
->statement_program_end
;
20176 /* Read the statement sequences until there's nothing left. */
20177 while (line_ptr
< line_end
)
20179 /* The DWARF line number program state machine. Reset the state
20180 machine at the start of each sequence. */
20181 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20182 bool end_sequence
= false;
20184 if (record_lines_p
)
20186 /* Start a subfile for the current file of the state
20188 const file_entry
*fe
= state_machine
.current_file ();
20191 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20194 /* Decode the table. */
20195 while (line_ptr
< line_end
&& !end_sequence
)
20197 op_code
= read_1_byte (abfd
, line_ptr
);
20200 if (op_code
>= lh
->opcode_base
)
20202 /* Special opcode. */
20203 state_machine
.handle_special_opcode (op_code
);
20205 else switch (op_code
)
20207 case DW_LNS_extended_op
:
20208 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20210 line_ptr
+= bytes_read
;
20211 extended_end
= line_ptr
+ extended_len
;
20212 extended_op
= read_1_byte (abfd
, line_ptr
);
20214 switch (extended_op
)
20216 case DW_LNE_end_sequence
:
20217 state_machine
.handle_end_sequence ();
20218 end_sequence
= true;
20220 case DW_LNE_set_address
:
20223 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
20224 line_ptr
+= bytes_read
;
20226 state_machine
.check_line_address (cu
, line_ptr
,
20227 lowpc
- baseaddr
, address
);
20228 state_machine
.handle_set_address (baseaddr
, address
);
20231 case DW_LNE_define_file
:
20233 const char *cur_file
;
20234 unsigned int mod_time
, length
;
20237 cur_file
= read_direct_string (abfd
, line_ptr
,
20239 line_ptr
+= bytes_read
;
20240 dindex
= (dir_index
)
20241 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20242 line_ptr
+= bytes_read
;
20244 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20245 line_ptr
+= bytes_read
;
20247 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20248 line_ptr
+= bytes_read
;
20249 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20252 case DW_LNE_set_discriminator
:
20254 /* The discriminator is not interesting to the
20255 debugger; just ignore it. We still need to
20256 check its value though:
20257 if there are consecutive entries for the same
20258 (non-prologue) line we want to coalesce them.
20261 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20262 line_ptr
+= bytes_read
;
20264 state_machine
.handle_set_discriminator (discr
);
20268 complaint (_("mangled .debug_line section"));
20271 /* Make sure that we parsed the extended op correctly. If e.g.
20272 we expected a different address size than the producer used,
20273 we may have read the wrong number of bytes. */
20274 if (line_ptr
!= extended_end
)
20276 complaint (_("mangled .debug_line section"));
20281 state_machine
.handle_copy ();
20283 case DW_LNS_advance_pc
:
20286 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20287 line_ptr
+= bytes_read
;
20289 state_machine
.handle_advance_pc (adjust
);
20292 case DW_LNS_advance_line
:
20295 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20296 line_ptr
+= bytes_read
;
20298 state_machine
.handle_advance_line (line_delta
);
20301 case DW_LNS_set_file
:
20303 file_name_index file
20304 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20306 line_ptr
+= bytes_read
;
20308 state_machine
.handle_set_file (file
);
20311 case DW_LNS_set_column
:
20312 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20313 line_ptr
+= bytes_read
;
20315 case DW_LNS_negate_stmt
:
20316 state_machine
.handle_negate_stmt ();
20318 case DW_LNS_set_basic_block
:
20320 /* Add to the address register of the state machine the
20321 address increment value corresponding to special opcode
20322 255. I.e., this value is scaled by the minimum
20323 instruction length since special opcode 255 would have
20324 scaled the increment. */
20325 case DW_LNS_const_add_pc
:
20326 state_machine
.handle_const_add_pc ();
20328 case DW_LNS_fixed_advance_pc
:
20330 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20333 state_machine
.handle_fixed_advance_pc (addr_adj
);
20338 /* Unknown standard opcode, ignore it. */
20341 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20343 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20344 line_ptr
+= bytes_read
;
20351 dwarf2_debug_line_missing_end_sequence_complaint ();
20353 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20354 in which case we still finish recording the last line). */
20355 state_machine
.record_line (true);
20359 /* Decode the Line Number Program (LNP) for the given line_header
20360 structure and CU. The actual information extracted and the type
20361 of structures created from the LNP depends on the value of PST.
20363 1. If PST is NULL, then this procedure uses the data from the program
20364 to create all necessary symbol tables, and their linetables.
20366 2. If PST is not NULL, this procedure reads the program to determine
20367 the list of files included by the unit represented by PST, and
20368 builds all the associated partial symbol tables.
20370 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20371 It is used for relative paths in the line table.
20372 NOTE: When processing partial symtabs (pst != NULL),
20373 comp_dir == pst->dirname.
20375 NOTE: It is important that psymtabs have the same file name (via strcmp)
20376 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20377 symtab we don't use it in the name of the psymtabs we create.
20378 E.g. expand_line_sal requires this when finding psymtabs to expand.
20379 A good testcase for this is mb-inline.exp.
20381 LOWPC is the lowest address in CU (or 0 if not known).
20383 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20384 for its PC<->lines mapping information. Otherwise only the filename
20385 table is read in. */
20388 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20389 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
20390 CORE_ADDR lowpc
, int decode_mapping
)
20392 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20393 const int decode_for_pst_p
= (pst
!= NULL
);
20395 if (decode_mapping
)
20396 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20398 if (decode_for_pst_p
)
20400 /* Now that we're done scanning the Line Header Program, we can
20401 create the psymtab of each included file. */
20402 for (auto &file_entry
: lh
->file_names ())
20403 if (file_entry
.included_p
== 1)
20405 gdb::unique_xmalloc_ptr
<char> name_holder
;
20406 const char *include_name
=
20407 psymtab_include_file_name (lh
, file_entry
, pst
,
20408 comp_dir
, &name_holder
);
20409 if (include_name
!= NULL
)
20410 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20415 /* Make sure a symtab is created for every file, even files
20416 which contain only variables (i.e. no code with associated
20418 buildsym_compunit
*builder
= cu
->get_builder ();
20419 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
20421 for (auto &fe
: lh
->file_names ())
20423 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20424 if (builder
->get_current_subfile ()->symtab
== NULL
)
20426 builder
->get_current_subfile ()->symtab
20427 = allocate_symtab (cust
,
20428 builder
->get_current_subfile ()->name
);
20430 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
20435 /* Start a subfile for DWARF. FILENAME is the name of the file and
20436 DIRNAME the name of the source directory which contains FILENAME
20437 or NULL if not known.
20438 This routine tries to keep line numbers from identical absolute and
20439 relative file names in a common subfile.
20441 Using the `list' example from the GDB testsuite, which resides in
20442 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20443 of /srcdir/list0.c yields the following debugging information for list0.c:
20445 DW_AT_name: /srcdir/list0.c
20446 DW_AT_comp_dir: /compdir
20447 files.files[0].name: list0.h
20448 files.files[0].dir: /srcdir
20449 files.files[1].name: list0.c
20450 files.files[1].dir: /srcdir
20452 The line number information for list0.c has to end up in a single
20453 subfile, so that `break /srcdir/list0.c:1' works as expected.
20454 start_subfile will ensure that this happens provided that we pass the
20455 concatenation of files.files[1].dir and files.files[1].name as the
20459 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
20460 const char *dirname
)
20462 gdb::unique_xmalloc_ptr
<char> copy
;
20464 /* In order not to lose the line information directory,
20465 we concatenate it to the filename when it makes sense.
20466 Note that the Dwarf3 standard says (speaking of filenames in line
20467 information): ``The directory index is ignored for file names
20468 that represent full path names''. Thus ignoring dirname in the
20469 `else' branch below isn't an issue. */
20471 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
20473 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
20474 filename
= copy
.get ();
20477 cu
->get_builder ()->start_subfile (filename
);
20480 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
20481 buildsym_compunit constructor. */
20483 struct compunit_symtab
*
20484 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
20487 gdb_assert (m_builder
== nullptr);
20489 m_builder
.reset (new struct buildsym_compunit
20490 (per_cu
->dwarf2_per_objfile
->objfile
,
20491 name
, comp_dir
, language
, low_pc
));
20493 list_in_scope
= get_builder ()->get_file_symbols ();
20495 get_builder ()->record_debugformat ("DWARF 2");
20496 get_builder ()->record_producer (producer
);
20498 processing_has_namespace_info
= false;
20500 return get_builder ()->get_compunit_symtab ();
20504 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
20505 struct dwarf2_cu
*cu
)
20507 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20508 struct comp_unit_head
*cu_header
= &cu
->header
;
20510 /* NOTE drow/2003-01-30: There used to be a comment and some special
20511 code here to turn a symbol with DW_AT_external and a
20512 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
20513 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
20514 with some versions of binutils) where shared libraries could have
20515 relocations against symbols in their debug information - the
20516 minimal symbol would have the right address, but the debug info
20517 would not. It's no longer necessary, because we will explicitly
20518 apply relocations when we read in the debug information now. */
20520 /* A DW_AT_location attribute with no contents indicates that a
20521 variable has been optimized away. */
20522 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0)
20524 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20528 /* Handle one degenerate form of location expression specially, to
20529 preserve GDB's previous behavior when section offsets are
20530 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
20531 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
20533 if (attr
->form_is_block ()
20534 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
20535 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
20536 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
20537 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
20538 && (DW_BLOCK (attr
)->size
20539 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
20541 unsigned int dummy
;
20543 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
20544 SET_SYMBOL_VALUE_ADDRESS
20545 (sym
, cu
->header
.read_address (objfile
->obfd
,
20546 DW_BLOCK (attr
)->data
+ 1,
20549 SET_SYMBOL_VALUE_ADDRESS
20550 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
20552 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
20553 fixup_symbol_section (sym
, objfile
);
20554 SET_SYMBOL_VALUE_ADDRESS
20556 SYMBOL_VALUE_ADDRESS (sym
)
20557 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
20561 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
20562 expression evaluator, and use LOC_COMPUTED only when necessary
20563 (i.e. when the value of a register or memory location is
20564 referenced, or a thread-local block, etc.). Then again, it might
20565 not be worthwhile. I'm assuming that it isn't unless performance
20566 or memory numbers show me otherwise. */
20568 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
20570 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
20571 cu
->has_loclist
= true;
20574 /* Given a pointer to a DWARF information entry, figure out if we need
20575 to make a symbol table entry for it, and if so, create a new entry
20576 and return a pointer to it.
20577 If TYPE is NULL, determine symbol type from the die, otherwise
20578 used the passed type.
20579 If SPACE is not NULL, use it to hold the new symbol. If it is
20580 NULL, allocate a new symbol on the objfile's obstack. */
20582 static struct symbol
*
20583 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
20584 struct symbol
*space
)
20586 struct dwarf2_per_objfile
*dwarf2_per_objfile
20587 = cu
->per_cu
->dwarf2_per_objfile
;
20588 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20589 struct gdbarch
*gdbarch
= objfile
->arch ();
20590 struct symbol
*sym
= NULL
;
20592 struct attribute
*attr
= NULL
;
20593 struct attribute
*attr2
= NULL
;
20594 CORE_ADDR baseaddr
;
20595 struct pending
**list_to_add
= NULL
;
20597 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
20599 baseaddr
= objfile
->text_section_offset ();
20601 name
= dwarf2_name (die
, cu
);
20604 int suppress_add
= 0;
20609 sym
= allocate_symbol (objfile
);
20610 OBJSTAT (objfile
, n_syms
++);
20612 /* Cache this symbol's name and the name's demangled form (if any). */
20613 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
20614 /* Fortran does not have mangling standard and the mangling does differ
20615 between gfortran, iFort etc. */
20616 const char *physname
20617 = (cu
->language
== language_fortran
20618 ? dwarf2_full_name (name
, die
, cu
)
20619 : dwarf2_physname (name
, die
, cu
));
20620 const char *linkagename
= dw2_linkage_name (die
, cu
);
20622 if (linkagename
== nullptr || cu
->language
== language_ada
)
20623 sym
->set_linkage_name (physname
);
20626 sym
->set_demangled_name (physname
, &objfile
->objfile_obstack
);
20627 sym
->set_linkage_name (linkagename
);
20630 /* Default assumptions.
20631 Use the passed type or decode it from the die. */
20632 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20633 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20635 SYMBOL_TYPE (sym
) = type
;
20637 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
20638 attr
= dwarf2_attr (die
,
20639 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
20641 if (attr
!= nullptr)
20643 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
20646 attr
= dwarf2_attr (die
,
20647 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
20649 if (attr
!= nullptr)
20651 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
20652 struct file_entry
*fe
;
20654 if (cu
->line_header
!= NULL
)
20655 fe
= cu
->line_header
->file_name_at (file_index
);
20660 complaint (_("file index out of range"));
20662 symbol_set_symtab (sym
, fe
->symtab
);
20668 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
20669 if (attr
!= nullptr)
20673 addr
= attr
->value_as_address ();
20674 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
20675 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
20677 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
20678 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
20679 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
20680 add_symbol_to_list (sym
, cu
->list_in_scope
);
20682 case DW_TAG_subprogram
:
20683 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20685 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20686 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20687 if ((attr2
&& (DW_UNSND (attr2
) != 0))
20688 || cu
->language
== language_ada
20689 || cu
->language
== language_fortran
)
20691 /* Subprograms marked external are stored as a global symbol.
20692 Ada and Fortran subprograms, whether marked external or
20693 not, are always stored as a global symbol, because we want
20694 to be able to access them globally. For instance, we want
20695 to be able to break on a nested subprogram without having
20696 to specify the context. */
20697 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20701 list_to_add
= cu
->list_in_scope
;
20704 case DW_TAG_inlined_subroutine
:
20705 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20707 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20708 SYMBOL_INLINED (sym
) = 1;
20709 list_to_add
= cu
->list_in_scope
;
20711 case DW_TAG_template_value_param
:
20713 /* Fall through. */
20714 case DW_TAG_constant
:
20715 case DW_TAG_variable
:
20716 case DW_TAG_member
:
20717 /* Compilation with minimal debug info may result in
20718 variables with missing type entries. Change the
20719 misleading `void' type to something sensible. */
20720 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
20721 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
20723 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20724 /* In the case of DW_TAG_member, we should only be called for
20725 static const members. */
20726 if (die
->tag
== DW_TAG_member
)
20728 /* dwarf2_add_field uses die_is_declaration,
20729 so we do the same. */
20730 gdb_assert (die_is_declaration (die
, cu
));
20733 if (attr
!= nullptr)
20735 dwarf2_const_value (attr
, sym
, cu
);
20736 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20739 if (attr2
&& (DW_UNSND (attr2
) != 0))
20740 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20742 list_to_add
= cu
->list_in_scope
;
20746 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20747 if (attr
!= nullptr)
20749 var_decode_location (attr
, sym
, cu
);
20750 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20752 /* Fortran explicitly imports any global symbols to the local
20753 scope by DW_TAG_common_block. */
20754 if (cu
->language
== language_fortran
&& die
->parent
20755 && die
->parent
->tag
== DW_TAG_common_block
)
20758 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20759 && SYMBOL_VALUE_ADDRESS (sym
) == 0
20760 && !dwarf2_per_objfile
->has_section_at_zero
)
20762 /* When a static variable is eliminated by the linker,
20763 the corresponding debug information is not stripped
20764 out, but the variable address is set to null;
20765 do not add such variables into symbol table. */
20767 else if (attr2
&& (DW_UNSND (attr2
) != 0))
20769 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20770 && (objfile
->flags
& OBJF_MAINLINE
) == 0
20771 && dwarf2_per_objfile
->can_copy
)
20773 /* A global static variable might be subject to
20774 copy relocation. We first check for a local
20775 minsym, though, because maybe the symbol was
20776 marked hidden, in which case this would not
20778 bound_minimal_symbol found
20779 = (lookup_minimal_symbol_linkage
20780 (sym
->linkage_name (), objfile
));
20781 if (found
.minsym
!= nullptr)
20782 sym
->maybe_copied
= 1;
20785 /* A variable with DW_AT_external is never static,
20786 but it may be block-scoped. */
20788 = ((cu
->list_in_scope
20789 == cu
->get_builder ()->get_file_symbols ())
20790 ? cu
->get_builder ()->get_global_symbols ()
20791 : cu
->list_in_scope
);
20794 list_to_add
= cu
->list_in_scope
;
20798 /* We do not know the address of this symbol.
20799 If it is an external symbol and we have type information
20800 for it, enter the symbol as a LOC_UNRESOLVED symbol.
20801 The address of the variable will then be determined from
20802 the minimal symbol table whenever the variable is
20804 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20806 /* Fortran explicitly imports any global symbols to the local
20807 scope by DW_TAG_common_block. */
20808 if (cu
->language
== language_fortran
&& die
->parent
20809 && die
->parent
->tag
== DW_TAG_common_block
)
20811 /* SYMBOL_CLASS doesn't matter here because
20812 read_common_block is going to reset it. */
20814 list_to_add
= cu
->list_in_scope
;
20816 else if (attr2
&& (DW_UNSND (attr2
) != 0)
20817 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
20819 /* A variable with DW_AT_external is never static, but it
20820 may be block-scoped. */
20822 = ((cu
->list_in_scope
20823 == cu
->get_builder ()->get_file_symbols ())
20824 ? cu
->get_builder ()->get_global_symbols ()
20825 : cu
->list_in_scope
);
20827 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20829 else if (!die_is_declaration (die
, cu
))
20831 /* Use the default LOC_OPTIMIZED_OUT class. */
20832 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
20834 list_to_add
= cu
->list_in_scope
;
20838 case DW_TAG_formal_parameter
:
20840 /* If we are inside a function, mark this as an argument. If
20841 not, we might be looking at an argument to an inlined function
20842 when we do not have enough information to show inlined frames;
20843 pretend it's a local variable in that case so that the user can
20845 struct context_stack
*curr
20846 = cu
->get_builder ()->get_current_context_stack ();
20847 if (curr
!= nullptr && curr
->name
!= nullptr)
20848 SYMBOL_IS_ARGUMENT (sym
) = 1;
20849 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20850 if (attr
!= nullptr)
20852 var_decode_location (attr
, sym
, cu
);
20854 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20855 if (attr
!= nullptr)
20857 dwarf2_const_value (attr
, sym
, cu
);
20860 list_to_add
= cu
->list_in_scope
;
20863 case DW_TAG_unspecified_parameters
:
20864 /* From varargs functions; gdb doesn't seem to have any
20865 interest in this information, so just ignore it for now.
20868 case DW_TAG_template_type_param
:
20870 /* Fall through. */
20871 case DW_TAG_class_type
:
20872 case DW_TAG_interface_type
:
20873 case DW_TAG_structure_type
:
20874 case DW_TAG_union_type
:
20875 case DW_TAG_set_type
:
20876 case DW_TAG_enumeration_type
:
20877 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20878 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
20881 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
20882 really ever be static objects: otherwise, if you try
20883 to, say, break of a class's method and you're in a file
20884 which doesn't mention that class, it won't work unless
20885 the check for all static symbols in lookup_symbol_aux
20886 saves you. See the OtherFileClass tests in
20887 gdb.c++/namespace.exp. */
20891 buildsym_compunit
*builder
= cu
->get_builder ();
20893 = (cu
->list_in_scope
== builder
->get_file_symbols ()
20894 && cu
->language
== language_cplus
20895 ? builder
->get_global_symbols ()
20896 : cu
->list_in_scope
);
20898 /* The semantics of C++ state that "struct foo {
20899 ... }" also defines a typedef for "foo". */
20900 if (cu
->language
== language_cplus
20901 || cu
->language
== language_ada
20902 || cu
->language
== language_d
20903 || cu
->language
== language_rust
)
20905 /* The symbol's name is already allocated along
20906 with this objfile, so we don't need to
20907 duplicate it for the type. */
20908 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
20909 TYPE_NAME (SYMBOL_TYPE (sym
)) = sym
->search_name ();
20914 case DW_TAG_typedef
:
20915 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20916 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20917 list_to_add
= cu
->list_in_scope
;
20919 case DW_TAG_base_type
:
20920 case DW_TAG_subrange_type
:
20921 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20922 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20923 list_to_add
= cu
->list_in_scope
;
20925 case DW_TAG_enumerator
:
20926 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20927 if (attr
!= nullptr)
20929 dwarf2_const_value (attr
, sym
, cu
);
20932 /* NOTE: carlton/2003-11-10: See comment above in the
20933 DW_TAG_class_type, etc. block. */
20936 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
20937 && cu
->language
== language_cplus
20938 ? cu
->get_builder ()->get_global_symbols ()
20939 : cu
->list_in_scope
);
20942 case DW_TAG_imported_declaration
:
20943 case DW_TAG_namespace
:
20944 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20945 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20947 case DW_TAG_module
:
20948 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20949 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
20950 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20952 case DW_TAG_common_block
:
20953 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
20954 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
20955 add_symbol_to_list (sym
, cu
->list_in_scope
);
20958 /* Not a tag we recognize. Hopefully we aren't processing
20959 trash data, but since we must specifically ignore things
20960 we don't recognize, there is nothing else we should do at
20962 complaint (_("unsupported tag: '%s'"),
20963 dwarf_tag_name (die
->tag
));
20969 sym
->hash_next
= objfile
->template_symbols
;
20970 objfile
->template_symbols
= sym
;
20971 list_to_add
= NULL
;
20974 if (list_to_add
!= NULL
)
20975 add_symbol_to_list (sym
, list_to_add
);
20977 /* For the benefit of old versions of GCC, check for anonymous
20978 namespaces based on the demangled name. */
20979 if (!cu
->processing_has_namespace_info
20980 && cu
->language
== language_cplus
)
20981 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
20986 /* Given an attr with a DW_FORM_dataN value in host byte order,
20987 zero-extend it as appropriate for the symbol's type. The DWARF
20988 standard (v4) is not entirely clear about the meaning of using
20989 DW_FORM_dataN for a constant with a signed type, where the type is
20990 wider than the data. The conclusion of a discussion on the DWARF
20991 list was that this is unspecified. We choose to always zero-extend
20992 because that is the interpretation long in use by GCC. */
20995 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
20996 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
20998 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20999 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21000 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21001 LONGEST l
= DW_UNSND (attr
);
21003 if (bits
< sizeof (*value
) * 8)
21005 l
&= ((LONGEST
) 1 << bits
) - 1;
21008 else if (bits
== sizeof (*value
) * 8)
21012 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21013 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21020 /* Read a constant value from an attribute. Either set *VALUE, or if
21021 the value does not fit in *VALUE, set *BYTES - either already
21022 allocated on the objfile obstack, or newly allocated on OBSTACK,
21023 or, set *BATON, if we translated the constant to a location
21027 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21028 const char *name
, struct obstack
*obstack
,
21029 struct dwarf2_cu
*cu
,
21030 LONGEST
*value
, const gdb_byte
**bytes
,
21031 struct dwarf2_locexpr_baton
**baton
)
21033 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21034 struct comp_unit_head
*cu_header
= &cu
->header
;
21035 struct dwarf_block
*blk
;
21036 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21037 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21043 switch (attr
->form
)
21046 case DW_FORM_addrx
:
21047 case DW_FORM_GNU_addr_index
:
21051 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21052 dwarf2_const_value_length_mismatch_complaint (name
,
21053 cu_header
->addr_size
,
21054 TYPE_LENGTH (type
));
21055 /* Symbols of this form are reasonably rare, so we just
21056 piggyback on the existing location code rather than writing
21057 a new implementation of symbol_computed_ops. */
21058 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21059 (*baton
)->per_cu
= cu
->per_cu
;
21060 gdb_assert ((*baton
)->per_cu
);
21062 (*baton
)->size
= 2 + cu_header
->addr_size
;
21063 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21064 (*baton
)->data
= data
;
21066 data
[0] = DW_OP_addr
;
21067 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21068 byte_order
, DW_ADDR (attr
));
21069 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21072 case DW_FORM_string
:
21075 case DW_FORM_GNU_str_index
:
21076 case DW_FORM_GNU_strp_alt
:
21077 /* DW_STRING is already allocated on the objfile obstack, point
21079 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21081 case DW_FORM_block1
:
21082 case DW_FORM_block2
:
21083 case DW_FORM_block4
:
21084 case DW_FORM_block
:
21085 case DW_FORM_exprloc
:
21086 case DW_FORM_data16
:
21087 blk
= DW_BLOCK (attr
);
21088 if (TYPE_LENGTH (type
) != blk
->size
)
21089 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21090 TYPE_LENGTH (type
));
21091 *bytes
= blk
->data
;
21094 /* The DW_AT_const_value attributes are supposed to carry the
21095 symbol's value "represented as it would be on the target
21096 architecture." By the time we get here, it's already been
21097 converted to host endianness, so we just need to sign- or
21098 zero-extend it as appropriate. */
21099 case DW_FORM_data1
:
21100 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21102 case DW_FORM_data2
:
21103 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21105 case DW_FORM_data4
:
21106 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21108 case DW_FORM_data8
:
21109 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21112 case DW_FORM_sdata
:
21113 case DW_FORM_implicit_const
:
21114 *value
= DW_SND (attr
);
21117 case DW_FORM_udata
:
21118 *value
= DW_UNSND (attr
);
21122 complaint (_("unsupported const value attribute form: '%s'"),
21123 dwarf_form_name (attr
->form
));
21130 /* Copy constant value from an attribute to a symbol. */
21133 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21134 struct dwarf2_cu
*cu
)
21136 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21138 const gdb_byte
*bytes
;
21139 struct dwarf2_locexpr_baton
*baton
;
21141 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21142 sym
->print_name (),
21143 &objfile
->objfile_obstack
, cu
,
21144 &value
, &bytes
, &baton
);
21148 SYMBOL_LOCATION_BATON (sym
) = baton
;
21149 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21151 else if (bytes
!= NULL
)
21153 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21154 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21158 SYMBOL_VALUE (sym
) = value
;
21159 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21163 /* Return the type of the die in question using its DW_AT_type attribute. */
21165 static struct type
*
21166 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21168 struct attribute
*type_attr
;
21170 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21173 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21174 /* A missing DW_AT_type represents a void type. */
21175 return objfile_type (objfile
)->builtin_void
;
21178 return lookup_die_type (die
, type_attr
, cu
);
21181 /* True iff CU's producer generates GNAT Ada auxiliary information
21182 that allows to find parallel types through that information instead
21183 of having to do expensive parallel lookups by type name. */
21186 need_gnat_info (struct dwarf2_cu
*cu
)
21188 /* Assume that the Ada compiler was GNAT, which always produces
21189 the auxiliary information. */
21190 return (cu
->language
== language_ada
);
21193 /* Return the auxiliary type of the die in question using its
21194 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21195 attribute is not present. */
21197 static struct type
*
21198 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21200 struct attribute
*type_attr
;
21202 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21206 return lookup_die_type (die
, type_attr
, cu
);
21209 /* If DIE has a descriptive_type attribute, then set the TYPE's
21210 descriptive type accordingly. */
21213 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21214 struct dwarf2_cu
*cu
)
21216 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21218 if (descriptive_type
)
21220 ALLOCATE_GNAT_AUX_TYPE (type
);
21221 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21225 /* Return the containing type of the die in question using its
21226 DW_AT_containing_type attribute. */
21228 static struct type
*
21229 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21231 struct attribute
*type_attr
;
21232 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21234 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21236 error (_("Dwarf Error: Problem turning containing type into gdb type "
21237 "[in module %s]"), objfile_name (objfile
));
21239 return lookup_die_type (die
, type_attr
, cu
);
21242 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21244 static struct type
*
21245 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21247 struct dwarf2_per_objfile
*dwarf2_per_objfile
21248 = cu
->per_cu
->dwarf2_per_objfile
;
21249 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21252 std::string message
21253 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
21254 objfile_name (objfile
),
21255 sect_offset_str (cu
->header
.sect_off
),
21256 sect_offset_str (die
->sect_off
));
21257 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
21259 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21262 /* Look up the type of DIE in CU using its type attribute ATTR.
21263 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21264 DW_AT_containing_type.
21265 If there is no type substitute an error marker. */
21267 static struct type
*
21268 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21269 struct dwarf2_cu
*cu
)
21271 struct dwarf2_per_objfile
*dwarf2_per_objfile
21272 = cu
->per_cu
->dwarf2_per_objfile
;
21273 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21274 struct type
*this_type
;
21276 gdb_assert (attr
->name
== DW_AT_type
21277 || attr
->name
== DW_AT_GNAT_descriptive_type
21278 || attr
->name
== DW_AT_containing_type
);
21280 /* First see if we have it cached. */
21282 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21284 struct dwarf2_per_cu_data
*per_cu
;
21285 sect_offset sect_off
= attr
->get_ref_die_offset ();
21287 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21288 dwarf2_per_objfile
);
21289 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21291 else if (attr
->form_is_ref ())
21293 sect_offset sect_off
= attr
->get_ref_die_offset ();
21295 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21297 else if (attr
->form
== DW_FORM_ref_sig8
)
21299 ULONGEST signature
= DW_SIGNATURE (attr
);
21301 return get_signatured_type (die
, signature
, cu
);
21305 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21306 " at %s [in module %s]"),
21307 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21308 objfile_name (objfile
));
21309 return build_error_marker_type (cu
, die
);
21312 /* If not cached we need to read it in. */
21314 if (this_type
== NULL
)
21316 struct die_info
*type_die
= NULL
;
21317 struct dwarf2_cu
*type_cu
= cu
;
21319 if (attr
->form_is_ref ())
21320 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21321 if (type_die
== NULL
)
21322 return build_error_marker_type (cu
, die
);
21323 /* If we find the type now, it's probably because the type came
21324 from an inter-CU reference and the type's CU got expanded before
21326 this_type
= read_type_die (type_die
, type_cu
);
21329 /* If we still don't have a type use an error marker. */
21331 if (this_type
== NULL
)
21332 return build_error_marker_type (cu
, die
);
21337 /* Return the type in DIE, CU.
21338 Returns NULL for invalid types.
21340 This first does a lookup in die_type_hash,
21341 and only reads the die in if necessary.
21343 NOTE: This can be called when reading in partial or full symbols. */
21345 static struct type
*
21346 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21348 struct type
*this_type
;
21350 this_type
= get_die_type (die
, cu
);
21354 return read_type_die_1 (die
, cu
);
21357 /* Read the type in DIE, CU.
21358 Returns NULL for invalid types. */
21360 static struct type
*
21361 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21363 struct type
*this_type
= NULL
;
21367 case DW_TAG_class_type
:
21368 case DW_TAG_interface_type
:
21369 case DW_TAG_structure_type
:
21370 case DW_TAG_union_type
:
21371 this_type
= read_structure_type (die
, cu
);
21373 case DW_TAG_enumeration_type
:
21374 this_type
= read_enumeration_type (die
, cu
);
21376 case DW_TAG_subprogram
:
21377 case DW_TAG_subroutine_type
:
21378 case DW_TAG_inlined_subroutine
:
21379 this_type
= read_subroutine_type (die
, cu
);
21381 case DW_TAG_array_type
:
21382 this_type
= read_array_type (die
, cu
);
21384 case DW_TAG_set_type
:
21385 this_type
= read_set_type (die
, cu
);
21387 case DW_TAG_pointer_type
:
21388 this_type
= read_tag_pointer_type (die
, cu
);
21390 case DW_TAG_ptr_to_member_type
:
21391 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21393 case DW_TAG_reference_type
:
21394 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21396 case DW_TAG_rvalue_reference_type
:
21397 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21399 case DW_TAG_const_type
:
21400 this_type
= read_tag_const_type (die
, cu
);
21402 case DW_TAG_volatile_type
:
21403 this_type
= read_tag_volatile_type (die
, cu
);
21405 case DW_TAG_restrict_type
:
21406 this_type
= read_tag_restrict_type (die
, cu
);
21408 case DW_TAG_string_type
:
21409 this_type
= read_tag_string_type (die
, cu
);
21411 case DW_TAG_typedef
:
21412 this_type
= read_typedef (die
, cu
);
21414 case DW_TAG_subrange_type
:
21415 this_type
= read_subrange_type (die
, cu
);
21417 case DW_TAG_base_type
:
21418 this_type
= read_base_type (die
, cu
);
21420 case DW_TAG_unspecified_type
:
21421 this_type
= read_unspecified_type (die
, cu
);
21423 case DW_TAG_namespace
:
21424 this_type
= read_namespace_type (die
, cu
);
21426 case DW_TAG_module
:
21427 this_type
= read_module_type (die
, cu
);
21429 case DW_TAG_atomic_type
:
21430 this_type
= read_tag_atomic_type (die
, cu
);
21433 complaint (_("unexpected tag in read_type_die: '%s'"),
21434 dwarf_tag_name (die
->tag
));
21441 /* See if we can figure out if the class lives in a namespace. We do
21442 this by looking for a member function; its demangled name will
21443 contain namespace info, if there is any.
21444 Return the computed name or NULL.
21445 Space for the result is allocated on the objfile's obstack.
21446 This is the full-die version of guess_partial_die_structure_name.
21447 In this case we know DIE has no useful parent. */
21449 static const char *
21450 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21452 struct die_info
*spec_die
;
21453 struct dwarf2_cu
*spec_cu
;
21454 struct die_info
*child
;
21455 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21458 spec_die
= die_specification (die
, &spec_cu
);
21459 if (spec_die
!= NULL
)
21465 for (child
= die
->child
;
21467 child
= child
->sibling
)
21469 if (child
->tag
== DW_TAG_subprogram
)
21471 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21473 if (linkage_name
!= NULL
)
21475 gdb::unique_xmalloc_ptr
<char> actual_name
21476 (language_class_name_from_physname (cu
->language_defn
,
21478 const char *name
= NULL
;
21480 if (actual_name
!= NULL
)
21482 const char *die_name
= dwarf2_name (die
, cu
);
21484 if (die_name
!= NULL
21485 && strcmp (die_name
, actual_name
.get ()) != 0)
21487 /* Strip off the class name from the full name.
21488 We want the prefix. */
21489 int die_name_len
= strlen (die_name
);
21490 int actual_name_len
= strlen (actual_name
.get ());
21491 const char *ptr
= actual_name
.get ();
21493 /* Test for '::' as a sanity check. */
21494 if (actual_name_len
> die_name_len
+ 2
21495 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
21496 name
= obstack_strndup (
21497 &objfile
->per_bfd
->storage_obstack
,
21498 ptr
, actual_name_len
- die_name_len
- 2);
21509 /* GCC might emit a nameless typedef that has a linkage name. Determine the
21510 prefix part in such case. See
21511 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21513 static const char *
21514 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21516 struct attribute
*attr
;
21519 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
21520 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
21523 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
21526 attr
= dw2_linkage_name_attr (die
, cu
);
21527 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21530 /* dwarf2_name had to be already called. */
21531 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
21533 /* Strip the base name, keep any leading namespaces/classes. */
21534 base
= strrchr (DW_STRING (attr
), ':');
21535 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
21538 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21539 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
21541 &base
[-1] - DW_STRING (attr
));
21544 /* Return the name of the namespace/class that DIE is defined within,
21545 or "" if we can't tell. The caller should not xfree the result.
21547 For example, if we're within the method foo() in the following
21557 then determine_prefix on foo's die will return "N::C". */
21559 static const char *
21560 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21562 struct dwarf2_per_objfile
*dwarf2_per_objfile
21563 = cu
->per_cu
->dwarf2_per_objfile
;
21564 struct die_info
*parent
, *spec_die
;
21565 struct dwarf2_cu
*spec_cu
;
21566 struct type
*parent_type
;
21567 const char *retval
;
21569 if (cu
->language
!= language_cplus
21570 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
21571 && cu
->language
!= language_rust
)
21574 retval
= anonymous_struct_prefix (die
, cu
);
21578 /* We have to be careful in the presence of DW_AT_specification.
21579 For example, with GCC 3.4, given the code
21583 // Definition of N::foo.
21587 then we'll have a tree of DIEs like this:
21589 1: DW_TAG_compile_unit
21590 2: DW_TAG_namespace // N
21591 3: DW_TAG_subprogram // declaration of N::foo
21592 4: DW_TAG_subprogram // definition of N::foo
21593 DW_AT_specification // refers to die #3
21595 Thus, when processing die #4, we have to pretend that we're in
21596 the context of its DW_AT_specification, namely the contex of die
21599 spec_die
= die_specification (die
, &spec_cu
);
21600 if (spec_die
== NULL
)
21601 parent
= die
->parent
;
21604 parent
= spec_die
->parent
;
21608 if (parent
== NULL
)
21610 else if (parent
->building_fullname
)
21613 const char *parent_name
;
21615 /* It has been seen on RealView 2.2 built binaries,
21616 DW_TAG_template_type_param types actually _defined_ as
21617 children of the parent class:
21620 template class <class Enum> Class{};
21621 Class<enum E> class_e;
21623 1: DW_TAG_class_type (Class)
21624 2: DW_TAG_enumeration_type (E)
21625 3: DW_TAG_enumerator (enum1:0)
21626 3: DW_TAG_enumerator (enum2:1)
21628 2: DW_TAG_template_type_param
21629 DW_AT_type DW_FORM_ref_udata (E)
21631 Besides being broken debug info, it can put GDB into an
21632 infinite loop. Consider:
21634 When we're building the full name for Class<E>, we'll start
21635 at Class, and go look over its template type parameters,
21636 finding E. We'll then try to build the full name of E, and
21637 reach here. We're now trying to build the full name of E,
21638 and look over the parent DIE for containing scope. In the
21639 broken case, if we followed the parent DIE of E, we'd again
21640 find Class, and once again go look at its template type
21641 arguments, etc., etc. Simply don't consider such parent die
21642 as source-level parent of this die (it can't be, the language
21643 doesn't allow it), and break the loop here. */
21644 name
= dwarf2_name (die
, cu
);
21645 parent_name
= dwarf2_name (parent
, cu
);
21646 complaint (_("template param type '%s' defined within parent '%s'"),
21647 name
? name
: "<unknown>",
21648 parent_name
? parent_name
: "<unknown>");
21652 switch (parent
->tag
)
21654 case DW_TAG_namespace
:
21655 parent_type
= read_type_die (parent
, cu
);
21656 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
21657 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
21658 Work around this problem here. */
21659 if (cu
->language
== language_cplus
21660 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
21662 /* We give a name to even anonymous namespaces. */
21663 return TYPE_NAME (parent_type
);
21664 case DW_TAG_class_type
:
21665 case DW_TAG_interface_type
:
21666 case DW_TAG_structure_type
:
21667 case DW_TAG_union_type
:
21668 case DW_TAG_module
:
21669 parent_type
= read_type_die (parent
, cu
);
21670 if (TYPE_NAME (parent_type
) != NULL
)
21671 return TYPE_NAME (parent_type
);
21673 /* An anonymous structure is only allowed non-static data
21674 members; no typedefs, no member functions, et cetera.
21675 So it does not need a prefix. */
21677 case DW_TAG_compile_unit
:
21678 case DW_TAG_partial_unit
:
21679 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
21680 if (cu
->language
== language_cplus
21681 && !dwarf2_per_objfile
->types
.empty ()
21682 && die
->child
!= NULL
21683 && (die
->tag
== DW_TAG_class_type
21684 || die
->tag
== DW_TAG_structure_type
21685 || die
->tag
== DW_TAG_union_type
))
21687 const char *name
= guess_full_die_structure_name (die
, cu
);
21692 case DW_TAG_subprogram
:
21693 /* Nested subroutines in Fortran get a prefix with the name
21694 of the parent's subroutine. */
21695 if (cu
->language
== language_fortran
)
21697 if ((die
->tag
== DW_TAG_subprogram
)
21698 && (dwarf2_name (parent
, cu
) != NULL
))
21699 return dwarf2_name (parent
, cu
);
21701 return determine_prefix (parent
, cu
);
21702 case DW_TAG_enumeration_type
:
21703 parent_type
= read_type_die (parent
, cu
);
21704 if (TYPE_DECLARED_CLASS (parent_type
))
21706 if (TYPE_NAME (parent_type
) != NULL
)
21707 return TYPE_NAME (parent_type
);
21710 /* Fall through. */
21712 return determine_prefix (parent
, cu
);
21716 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
21717 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
21718 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
21719 an obconcat, otherwise allocate storage for the result. The CU argument is
21720 used to determine the language and hence, the appropriate separator. */
21722 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
21725 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
21726 int physname
, struct dwarf2_cu
*cu
)
21728 const char *lead
= "";
21731 if (suffix
== NULL
|| suffix
[0] == '\0'
21732 || prefix
== NULL
|| prefix
[0] == '\0')
21734 else if (cu
->language
== language_d
)
21736 /* For D, the 'main' function could be defined in any module, but it
21737 should never be prefixed. */
21738 if (strcmp (suffix
, "D main") == 0)
21746 else if (cu
->language
== language_fortran
&& physname
)
21748 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
21749 DW_AT_MIPS_linkage_name is preferred and used instead. */
21757 if (prefix
== NULL
)
21759 if (suffix
== NULL
)
21766 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
21768 strcpy (retval
, lead
);
21769 strcat (retval
, prefix
);
21770 strcat (retval
, sep
);
21771 strcat (retval
, suffix
);
21776 /* We have an obstack. */
21777 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
21781 /* Get name of a die, return NULL if not found. */
21783 static const char *
21784 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
21785 struct objfile
*objfile
)
21787 if (name
&& cu
->language
== language_cplus
)
21789 gdb::unique_xmalloc_ptr
<char> canon_name
21790 = cp_canonicalize_string (name
);
21792 if (canon_name
!= nullptr)
21793 name
= objfile
->intern (canon_name
.get ());
21799 /* Get name of a die, return NULL if not found.
21800 Anonymous namespaces are converted to their magic string. */
21802 static const char *
21803 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21805 struct attribute
*attr
;
21806 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21808 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
21809 if ((!attr
|| !DW_STRING (attr
))
21810 && die
->tag
!= DW_TAG_namespace
21811 && die
->tag
!= DW_TAG_class_type
21812 && die
->tag
!= DW_TAG_interface_type
21813 && die
->tag
!= DW_TAG_structure_type
21814 && die
->tag
!= DW_TAG_union_type
)
21819 case DW_TAG_compile_unit
:
21820 case DW_TAG_partial_unit
:
21821 /* Compilation units have a DW_AT_name that is a filename, not
21822 a source language identifier. */
21823 case DW_TAG_enumeration_type
:
21824 case DW_TAG_enumerator
:
21825 /* These tags always have simple identifiers already; no need
21826 to canonicalize them. */
21827 return DW_STRING (attr
);
21829 case DW_TAG_namespace
:
21830 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
21831 return DW_STRING (attr
);
21832 return CP_ANONYMOUS_NAMESPACE_STR
;
21834 case DW_TAG_class_type
:
21835 case DW_TAG_interface_type
:
21836 case DW_TAG_structure_type
:
21837 case DW_TAG_union_type
:
21838 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
21839 structures or unions. These were of the form "._%d" in GCC 4.1,
21840 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
21841 and GCC 4.4. We work around this problem by ignoring these. */
21842 if (attr
&& DW_STRING (attr
)
21843 && (startswith (DW_STRING (attr
), "._")
21844 || startswith (DW_STRING (attr
), "<anonymous")))
21847 /* GCC might emit a nameless typedef that has a linkage name. See
21848 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21849 if (!attr
|| DW_STRING (attr
) == NULL
)
21851 attr
= dw2_linkage_name_attr (die
, cu
);
21852 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21855 /* Avoid demangling DW_STRING (attr) the second time on a second
21856 call for the same DIE. */
21857 if (!DW_STRING_IS_CANONICAL (attr
))
21859 gdb::unique_xmalloc_ptr
<char> demangled
21860 (gdb_demangle (DW_STRING (attr
), DMGL_TYPES
));
21861 if (demangled
== nullptr)
21864 DW_STRING (attr
) = objfile
->intern (demangled
.get ());
21865 DW_STRING_IS_CANONICAL (attr
) = 1;
21868 /* Strip any leading namespaces/classes, keep only the base name.
21869 DW_AT_name for named DIEs does not contain the prefixes. */
21870 const char *base
= strrchr (DW_STRING (attr
), ':');
21871 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
21874 return DW_STRING (attr
);
21882 if (!DW_STRING_IS_CANONICAL (attr
))
21884 DW_STRING (attr
) = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
21886 DW_STRING_IS_CANONICAL (attr
) = 1;
21888 return DW_STRING (attr
);
21891 /* Return the die that this die in an extension of, or NULL if there
21892 is none. *EXT_CU is the CU containing DIE on input, and the CU
21893 containing the return value on output. */
21895 static struct die_info
*
21896 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
21898 struct attribute
*attr
;
21900 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
21904 return follow_die_ref (die
, attr
, ext_cu
);
21908 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
21912 print_spaces (indent
, f
);
21913 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
21914 dwarf_tag_name (die
->tag
), die
->abbrev
,
21915 sect_offset_str (die
->sect_off
));
21917 if (die
->parent
!= NULL
)
21919 print_spaces (indent
, f
);
21920 fprintf_unfiltered (f
, " parent at offset: %s\n",
21921 sect_offset_str (die
->parent
->sect_off
));
21924 print_spaces (indent
, f
);
21925 fprintf_unfiltered (f
, " has children: %s\n",
21926 dwarf_bool_name (die
->child
!= NULL
));
21928 print_spaces (indent
, f
);
21929 fprintf_unfiltered (f
, " attributes:\n");
21931 for (i
= 0; i
< die
->num_attrs
; ++i
)
21933 print_spaces (indent
, f
);
21934 fprintf_unfiltered (f
, " %s (%s) ",
21935 dwarf_attr_name (die
->attrs
[i
].name
),
21936 dwarf_form_name (die
->attrs
[i
].form
));
21938 switch (die
->attrs
[i
].form
)
21941 case DW_FORM_addrx
:
21942 case DW_FORM_GNU_addr_index
:
21943 fprintf_unfiltered (f
, "address: ");
21944 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
21946 case DW_FORM_block2
:
21947 case DW_FORM_block4
:
21948 case DW_FORM_block
:
21949 case DW_FORM_block1
:
21950 fprintf_unfiltered (f
, "block: size %s",
21951 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21953 case DW_FORM_exprloc
:
21954 fprintf_unfiltered (f
, "expression: size %s",
21955 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21957 case DW_FORM_data16
:
21958 fprintf_unfiltered (f
, "constant of 16 bytes");
21960 case DW_FORM_ref_addr
:
21961 fprintf_unfiltered (f
, "ref address: ");
21962 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21964 case DW_FORM_GNU_ref_alt
:
21965 fprintf_unfiltered (f
, "alt ref address: ");
21966 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21972 case DW_FORM_ref_udata
:
21973 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
21974 (long) (DW_UNSND (&die
->attrs
[i
])));
21976 case DW_FORM_data1
:
21977 case DW_FORM_data2
:
21978 case DW_FORM_data4
:
21979 case DW_FORM_data8
:
21980 case DW_FORM_udata
:
21981 case DW_FORM_sdata
:
21982 fprintf_unfiltered (f
, "constant: %s",
21983 pulongest (DW_UNSND (&die
->attrs
[i
])));
21985 case DW_FORM_sec_offset
:
21986 fprintf_unfiltered (f
, "section offset: %s",
21987 pulongest (DW_UNSND (&die
->attrs
[i
])));
21989 case DW_FORM_ref_sig8
:
21990 fprintf_unfiltered (f
, "signature: %s",
21991 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
21993 case DW_FORM_string
:
21995 case DW_FORM_line_strp
:
21997 case DW_FORM_GNU_str_index
:
21998 case DW_FORM_GNU_strp_alt
:
21999 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22000 DW_STRING (&die
->attrs
[i
])
22001 ? DW_STRING (&die
->attrs
[i
]) : "",
22002 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22005 if (DW_UNSND (&die
->attrs
[i
]))
22006 fprintf_unfiltered (f
, "flag: TRUE");
22008 fprintf_unfiltered (f
, "flag: FALSE");
22010 case DW_FORM_flag_present
:
22011 fprintf_unfiltered (f
, "flag: TRUE");
22013 case DW_FORM_indirect
:
22014 /* The reader will have reduced the indirect form to
22015 the "base form" so this form should not occur. */
22016 fprintf_unfiltered (f
,
22017 "unexpected attribute form: DW_FORM_indirect");
22019 case DW_FORM_implicit_const
:
22020 fprintf_unfiltered (f
, "constant: %s",
22021 plongest (DW_SND (&die
->attrs
[i
])));
22024 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22025 die
->attrs
[i
].form
);
22028 fprintf_unfiltered (f
, "\n");
22033 dump_die_for_error (struct die_info
*die
)
22035 dump_die_shallow (gdb_stderr
, 0, die
);
22039 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22041 int indent
= level
* 4;
22043 gdb_assert (die
!= NULL
);
22045 if (level
>= max_level
)
22048 dump_die_shallow (f
, indent
, die
);
22050 if (die
->child
!= NULL
)
22052 print_spaces (indent
, f
);
22053 fprintf_unfiltered (f
, " Children:");
22054 if (level
+ 1 < max_level
)
22056 fprintf_unfiltered (f
, "\n");
22057 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22061 fprintf_unfiltered (f
,
22062 " [not printed, max nesting level reached]\n");
22066 if (die
->sibling
!= NULL
&& level
> 0)
22068 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22072 /* This is called from the pdie macro in gdbinit.in.
22073 It's not static so gcc will keep a copy callable from gdb. */
22076 dump_die (struct die_info
*die
, int max_level
)
22078 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22082 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22086 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22087 to_underlying (die
->sect_off
),
22093 /* Follow reference or signature attribute ATTR of SRC_DIE.
22094 On entry *REF_CU is the CU of SRC_DIE.
22095 On exit *REF_CU is the CU of the result. */
22097 static struct die_info
*
22098 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22099 struct dwarf2_cu
**ref_cu
)
22101 struct die_info
*die
;
22103 if (attr
->form_is_ref ())
22104 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22105 else if (attr
->form
== DW_FORM_ref_sig8
)
22106 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22109 dump_die_for_error (src_die
);
22110 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22111 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22117 /* Follow reference OFFSET.
22118 On entry *REF_CU is the CU of the source die referencing OFFSET.
22119 On exit *REF_CU is the CU of the result.
22120 Returns NULL if OFFSET is invalid. */
22122 static struct die_info
*
22123 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22124 struct dwarf2_cu
**ref_cu
)
22126 struct die_info temp_die
;
22127 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22128 struct dwarf2_per_objfile
*dwarf2_per_objfile
22129 = cu
->per_cu
->dwarf2_per_objfile
;
22131 gdb_assert (cu
->per_cu
!= NULL
);
22135 if (cu
->per_cu
->is_debug_types
)
22137 /* .debug_types CUs cannot reference anything outside their CU.
22138 If they need to, they have to reference a signatured type via
22139 DW_FORM_ref_sig8. */
22140 if (!cu
->header
.offset_in_cu_p (sect_off
))
22143 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22144 || !cu
->header
.offset_in_cu_p (sect_off
))
22146 struct dwarf2_per_cu_data
*per_cu
;
22148 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22149 dwarf2_per_objfile
);
22151 /* If necessary, add it to the queue and load its DIEs. */
22152 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22153 load_full_comp_unit (per_cu
, false, cu
->language
);
22155 target_cu
= per_cu
->cu
;
22157 else if (cu
->dies
== NULL
)
22159 /* We're loading full DIEs during partial symbol reading. */
22160 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22161 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
22164 *ref_cu
= target_cu
;
22165 temp_die
.sect_off
= sect_off
;
22167 if (target_cu
!= cu
)
22168 target_cu
->ancestor
= cu
;
22170 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22172 to_underlying (sect_off
));
22175 /* Follow reference attribute ATTR of SRC_DIE.
22176 On entry *REF_CU is the CU of SRC_DIE.
22177 On exit *REF_CU is the CU of the result. */
22179 static struct die_info
*
22180 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22181 struct dwarf2_cu
**ref_cu
)
22183 sect_offset sect_off
= attr
->get_ref_die_offset ();
22184 struct dwarf2_cu
*cu
= *ref_cu
;
22185 struct die_info
*die
;
22187 die
= follow_die_offset (sect_off
,
22188 (attr
->form
== DW_FORM_GNU_ref_alt
22189 || cu
->per_cu
->is_dwz
),
22192 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22193 "at %s [in module %s]"),
22194 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22195 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22202 struct dwarf2_locexpr_baton
22203 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22204 dwarf2_per_cu_data
*per_cu
,
22205 CORE_ADDR (*get_frame_pc
) (void *baton
),
22206 void *baton
, bool resolve_abstract_p
)
22208 struct dwarf2_cu
*cu
;
22209 struct die_info
*die
;
22210 struct attribute
*attr
;
22211 struct dwarf2_locexpr_baton retval
;
22212 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22213 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22215 if (per_cu
->cu
== NULL
)
22216 load_cu (per_cu
, false);
22220 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22221 Instead just throw an error, not much else we can do. */
22222 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22223 sect_offset_str (sect_off
), objfile_name (objfile
));
22226 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22228 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22229 sect_offset_str (sect_off
), objfile_name (objfile
));
22231 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22232 if (!attr
&& resolve_abstract_p
22233 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
22234 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
22236 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22237 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
22238 struct gdbarch
*gdbarch
= objfile
->arch ();
22240 for (const auto &cand_off
22241 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
22243 struct dwarf2_cu
*cand_cu
= cu
;
22244 struct die_info
*cand
22245 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
22248 || cand
->parent
->tag
!= DW_TAG_subprogram
)
22251 CORE_ADDR pc_low
, pc_high
;
22252 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
22253 if (pc_low
== ((CORE_ADDR
) -1))
22255 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
22256 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
22257 if (!(pc_low
<= pc
&& pc
< pc_high
))
22261 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22268 /* DWARF: "If there is no such attribute, then there is no effect.".
22269 DATA is ignored if SIZE is 0. */
22271 retval
.data
= NULL
;
22274 else if (attr
->form_is_section_offset ())
22276 struct dwarf2_loclist_baton loclist_baton
;
22277 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22280 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22282 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22284 retval
.size
= size
;
22288 if (!attr
->form_is_block ())
22289 error (_("Dwarf Error: DIE at %s referenced in module %s "
22290 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22291 sect_offset_str (sect_off
), objfile_name (objfile
));
22293 retval
.data
= DW_BLOCK (attr
)->data
;
22294 retval
.size
= DW_BLOCK (attr
)->size
;
22296 retval
.per_cu
= cu
->per_cu
;
22298 age_cached_comp_units (dwarf2_per_objfile
);
22305 struct dwarf2_locexpr_baton
22306 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22307 dwarf2_per_cu_data
*per_cu
,
22308 CORE_ADDR (*get_frame_pc
) (void *baton
),
22311 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22313 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22316 /* Write a constant of a given type as target-ordered bytes into
22319 static const gdb_byte
*
22320 write_constant_as_bytes (struct obstack
*obstack
,
22321 enum bfd_endian byte_order
,
22328 *len
= TYPE_LENGTH (type
);
22329 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22330 store_unsigned_integer (result
, *len
, byte_order
, value
);
22338 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22339 dwarf2_per_cu_data
*per_cu
,
22343 struct dwarf2_cu
*cu
;
22344 struct die_info
*die
;
22345 struct attribute
*attr
;
22346 const gdb_byte
*result
= NULL
;
22349 enum bfd_endian byte_order
;
22350 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22352 if (per_cu
->cu
== NULL
)
22353 load_cu (per_cu
, false);
22357 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22358 Instead just throw an error, not much else we can do. */
22359 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22360 sect_offset_str (sect_off
), objfile_name (objfile
));
22363 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22365 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22366 sect_offset_str (sect_off
), objfile_name (objfile
));
22368 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22372 byte_order
= (bfd_big_endian (objfile
->obfd
)
22373 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22375 switch (attr
->form
)
22378 case DW_FORM_addrx
:
22379 case DW_FORM_GNU_addr_index
:
22383 *len
= cu
->header
.addr_size
;
22384 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22385 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22389 case DW_FORM_string
:
22392 case DW_FORM_GNU_str_index
:
22393 case DW_FORM_GNU_strp_alt
:
22394 /* DW_STRING is already allocated on the objfile obstack, point
22396 result
= (const gdb_byte
*) DW_STRING (attr
);
22397 *len
= strlen (DW_STRING (attr
));
22399 case DW_FORM_block1
:
22400 case DW_FORM_block2
:
22401 case DW_FORM_block4
:
22402 case DW_FORM_block
:
22403 case DW_FORM_exprloc
:
22404 case DW_FORM_data16
:
22405 result
= DW_BLOCK (attr
)->data
;
22406 *len
= DW_BLOCK (attr
)->size
;
22409 /* The DW_AT_const_value attributes are supposed to carry the
22410 symbol's value "represented as it would be on the target
22411 architecture." By the time we get here, it's already been
22412 converted to host endianness, so we just need to sign- or
22413 zero-extend it as appropriate. */
22414 case DW_FORM_data1
:
22415 type
= die_type (die
, cu
);
22416 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
22417 if (result
== NULL
)
22418 result
= write_constant_as_bytes (obstack
, byte_order
,
22421 case DW_FORM_data2
:
22422 type
= die_type (die
, cu
);
22423 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
22424 if (result
== NULL
)
22425 result
= write_constant_as_bytes (obstack
, byte_order
,
22428 case DW_FORM_data4
:
22429 type
= die_type (die
, cu
);
22430 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
22431 if (result
== NULL
)
22432 result
= write_constant_as_bytes (obstack
, byte_order
,
22435 case DW_FORM_data8
:
22436 type
= die_type (die
, cu
);
22437 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
22438 if (result
== NULL
)
22439 result
= write_constant_as_bytes (obstack
, byte_order
,
22443 case DW_FORM_sdata
:
22444 case DW_FORM_implicit_const
:
22445 type
= die_type (die
, cu
);
22446 result
= write_constant_as_bytes (obstack
, byte_order
,
22447 type
, DW_SND (attr
), len
);
22450 case DW_FORM_udata
:
22451 type
= die_type (die
, cu
);
22452 result
= write_constant_as_bytes (obstack
, byte_order
,
22453 type
, DW_UNSND (attr
), len
);
22457 complaint (_("unsupported const value attribute form: '%s'"),
22458 dwarf_form_name (attr
->form
));
22468 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
22469 dwarf2_per_cu_data
*per_cu
)
22471 struct dwarf2_cu
*cu
;
22472 struct die_info
*die
;
22474 if (per_cu
->cu
== NULL
)
22475 load_cu (per_cu
, false);
22480 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22484 return die_type (die
, cu
);
22490 dwarf2_get_die_type (cu_offset die_offset
,
22491 struct dwarf2_per_cu_data
*per_cu
)
22493 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
22494 return get_die_type_at_offset (die_offset_sect
, per_cu
);
22497 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
22498 On entry *REF_CU is the CU of SRC_DIE.
22499 On exit *REF_CU is the CU of the result.
22500 Returns NULL if the referenced DIE isn't found. */
22502 static struct die_info
*
22503 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
22504 struct dwarf2_cu
**ref_cu
)
22506 struct die_info temp_die
;
22507 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
22508 struct die_info
*die
;
22510 /* While it might be nice to assert sig_type->type == NULL here,
22511 we can get here for DW_AT_imported_declaration where we need
22512 the DIE not the type. */
22514 /* If necessary, add it to the queue and load its DIEs. */
22516 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
22517 read_signatured_type (sig_type
);
22519 sig_cu
= sig_type
->per_cu
.cu
;
22520 gdb_assert (sig_cu
!= NULL
);
22521 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
22522 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
22523 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
22524 to_underlying (temp_die
.sect_off
));
22527 struct dwarf2_per_objfile
*dwarf2_per_objfile
22528 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
22530 /* For .gdb_index version 7 keep track of included TUs.
22531 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
22532 if (dwarf2_per_objfile
->index_table
!= NULL
22533 && dwarf2_per_objfile
->index_table
->version
<= 7)
22535 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
22540 sig_cu
->ancestor
= cu
;
22548 /* Follow signatured type referenced by ATTR in SRC_DIE.
22549 On entry *REF_CU is the CU of SRC_DIE.
22550 On exit *REF_CU is the CU of the result.
22551 The result is the DIE of the type.
22552 If the referenced type cannot be found an error is thrown. */
22554 static struct die_info
*
22555 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22556 struct dwarf2_cu
**ref_cu
)
22558 ULONGEST signature
= DW_SIGNATURE (attr
);
22559 struct signatured_type
*sig_type
;
22560 struct die_info
*die
;
22562 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
22564 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
22565 /* sig_type will be NULL if the signatured type is missing from
22567 if (sig_type
== NULL
)
22569 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22570 " from DIE at %s [in module %s]"),
22571 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22572 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22575 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
22578 dump_die_for_error (src_die
);
22579 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22580 " from DIE at %s [in module %s]"),
22581 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22582 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22588 /* Get the type specified by SIGNATURE referenced in DIE/CU,
22589 reading in and processing the type unit if necessary. */
22591 static struct type
*
22592 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
22593 struct dwarf2_cu
*cu
)
22595 struct dwarf2_per_objfile
*dwarf2_per_objfile
22596 = cu
->per_cu
->dwarf2_per_objfile
;
22597 struct signatured_type
*sig_type
;
22598 struct dwarf2_cu
*type_cu
;
22599 struct die_info
*type_die
;
22602 sig_type
= lookup_signatured_type (cu
, signature
);
22603 /* sig_type will be NULL if the signatured type is missing from
22605 if (sig_type
== NULL
)
22607 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22608 " from DIE at %s [in module %s]"),
22609 hex_string (signature
), sect_offset_str (die
->sect_off
),
22610 objfile_name (dwarf2_per_objfile
->objfile
));
22611 return build_error_marker_type (cu
, die
);
22614 /* If we already know the type we're done. */
22615 if (sig_type
->type
!= NULL
)
22616 return sig_type
->type
;
22619 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
22620 if (type_die
!= NULL
)
22622 /* N.B. We need to call get_die_type to ensure only one type for this DIE
22623 is created. This is important, for example, because for c++ classes
22624 we need TYPE_NAME set which is only done by new_symbol. Blech. */
22625 type
= read_type_die (type_die
, type_cu
);
22628 complaint (_("Dwarf Error: Cannot build signatured type %s"
22629 " referenced from DIE at %s [in module %s]"),
22630 hex_string (signature
), sect_offset_str (die
->sect_off
),
22631 objfile_name (dwarf2_per_objfile
->objfile
));
22632 type
= build_error_marker_type (cu
, die
);
22637 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22638 " from DIE at %s [in module %s]"),
22639 hex_string (signature
), sect_offset_str (die
->sect_off
),
22640 objfile_name (dwarf2_per_objfile
->objfile
));
22641 type
= build_error_marker_type (cu
, die
);
22643 sig_type
->type
= type
;
22648 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
22649 reading in and processing the type unit if necessary. */
22651 static struct type
*
22652 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
22653 struct dwarf2_cu
*cu
) /* ARI: editCase function */
22655 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
22656 if (attr
->form_is_ref ())
22658 struct dwarf2_cu
*type_cu
= cu
;
22659 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
22661 return read_type_die (type_die
, type_cu
);
22663 else if (attr
->form
== DW_FORM_ref_sig8
)
22665 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
22669 struct dwarf2_per_objfile
*dwarf2_per_objfile
22670 = cu
->per_cu
->dwarf2_per_objfile
;
22672 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
22673 " at %s [in module %s]"),
22674 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
22675 objfile_name (dwarf2_per_objfile
->objfile
));
22676 return build_error_marker_type (cu
, die
);
22680 /* Load the DIEs associated with type unit PER_CU into memory. */
22683 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
22685 struct signatured_type
*sig_type
;
22687 /* Caller is responsible for ensuring type_unit_groups don't get here. */
22688 gdb_assert (! per_cu
->type_unit_group_p ());
22690 /* We have the per_cu, but we need the signatured_type.
22691 Fortunately this is an easy translation. */
22692 gdb_assert (per_cu
->is_debug_types
);
22693 sig_type
= (struct signatured_type
*) per_cu
;
22695 gdb_assert (per_cu
->cu
== NULL
);
22697 read_signatured_type (sig_type
);
22699 gdb_assert (per_cu
->cu
!= NULL
);
22702 /* Read in a signatured type and build its CU and DIEs.
22703 If the type is a stub for the real type in a DWO file,
22704 read in the real type from the DWO file as well. */
22707 read_signatured_type (struct signatured_type
*sig_type
)
22709 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
22711 gdb_assert (per_cu
->is_debug_types
);
22712 gdb_assert (per_cu
->cu
== NULL
);
22714 cutu_reader
reader (per_cu
, NULL
, 0, false);
22716 if (!reader
.dummy_p
)
22718 struct dwarf2_cu
*cu
= reader
.cu
;
22719 const gdb_byte
*info_ptr
= reader
.info_ptr
;
22721 gdb_assert (cu
->die_hash
== NULL
);
22723 htab_create_alloc_ex (cu
->header
.length
/ 12,
22727 &cu
->comp_unit_obstack
,
22728 hashtab_obstack_allocate
,
22729 dummy_obstack_deallocate
);
22731 if (reader
.comp_unit_die
->has_children
)
22732 reader
.comp_unit_die
->child
22733 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
22734 reader
.comp_unit_die
);
22735 cu
->dies
= reader
.comp_unit_die
;
22736 /* comp_unit_die is not stored in die_hash, no need. */
22738 /* We try not to read any attributes in this function, because
22739 not all CUs needed for references have been loaded yet, and
22740 symbol table processing isn't initialized. But we have to
22741 set the CU language, or we won't be able to build types
22742 correctly. Similarly, if we do not read the producer, we can
22743 not apply producer-specific interpretation. */
22744 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
22749 sig_type
->per_cu
.tu_read
= 1;
22752 /* Decode simple location descriptions.
22753 Given a pointer to a dwarf block that defines a location, compute
22754 the location and return the value. If COMPUTED is non-null, it is
22755 set to true to indicate that decoding was successful, and false
22756 otherwise. If COMPUTED is null, then this function may emit a
22760 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
, bool *computed
)
22762 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22764 size_t size
= blk
->size
;
22765 const gdb_byte
*data
= blk
->data
;
22766 CORE_ADDR stack
[64];
22768 unsigned int bytes_read
, unsnd
;
22771 if (computed
!= nullptr)
22777 stack
[++stacki
] = 0;
22816 stack
[++stacki
] = op
- DW_OP_lit0
;
22851 stack
[++stacki
] = op
- DW_OP_reg0
;
22854 if (computed
== nullptr)
22855 dwarf2_complex_location_expr_complaint ();
22862 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
22864 stack
[++stacki
] = unsnd
;
22867 if (computed
== nullptr)
22868 dwarf2_complex_location_expr_complaint ();
22875 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
22880 case DW_OP_const1u
:
22881 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
22885 case DW_OP_const1s
:
22886 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
22890 case DW_OP_const2u
:
22891 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
22895 case DW_OP_const2s
:
22896 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
22900 case DW_OP_const4u
:
22901 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
22905 case DW_OP_const4s
:
22906 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
22910 case DW_OP_const8u
:
22911 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
22916 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
22922 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
22927 stack
[stacki
+ 1] = stack
[stacki
];
22932 stack
[stacki
- 1] += stack
[stacki
];
22936 case DW_OP_plus_uconst
:
22937 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
22943 stack
[stacki
- 1] -= stack
[stacki
];
22948 /* If we're not the last op, then we definitely can't encode
22949 this using GDB's address_class enum. This is valid for partial
22950 global symbols, although the variable's address will be bogus
22954 if (computed
== nullptr)
22955 dwarf2_complex_location_expr_complaint ();
22961 case DW_OP_GNU_push_tls_address
:
22962 case DW_OP_form_tls_address
:
22963 /* The top of the stack has the offset from the beginning
22964 of the thread control block at which the variable is located. */
22965 /* Nothing should follow this operator, so the top of stack would
22967 /* This is valid for partial global symbols, but the variable's
22968 address will be bogus in the psymtab. Make it always at least
22969 non-zero to not look as a variable garbage collected by linker
22970 which have DW_OP_addr 0. */
22973 if (computed
== nullptr)
22974 dwarf2_complex_location_expr_complaint ();
22981 case DW_OP_GNU_uninit
:
22982 if (computed
!= nullptr)
22987 case DW_OP_GNU_addr_index
:
22988 case DW_OP_GNU_const_index
:
22989 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
22995 if (computed
== nullptr)
22997 const char *name
= get_DW_OP_name (op
);
23000 complaint (_("unsupported stack op: '%s'"),
23003 complaint (_("unsupported stack op: '%02x'"),
23007 return (stack
[stacki
]);
23010 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23011 outside of the allocated space. Also enforce minimum>0. */
23012 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23014 if (computed
== nullptr)
23015 complaint (_("location description stack overflow"));
23021 if (computed
== nullptr)
23022 complaint (_("location description stack underflow"));
23027 if (computed
!= nullptr)
23029 return (stack
[stacki
]);
23032 /* memory allocation interface */
23034 static struct dwarf_block
*
23035 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23037 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23040 static struct die_info
*
23041 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23043 struct die_info
*die
;
23044 size_t size
= sizeof (struct die_info
);
23047 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23049 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23050 memset (die
, 0, sizeof (struct die_info
));
23056 /* Macro support. */
23058 /* An overload of dwarf_decode_macros that finds the correct section
23059 and ensures it is read in before calling the other overload. */
23062 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
23063 int section_is_gnu
)
23065 struct dwarf2_per_objfile
*dwarf2_per_objfile
23066 = cu
->per_cu
->dwarf2_per_objfile
;
23067 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23068 const struct line_header
*lh
= cu
->line_header
;
23069 unsigned int offset_size
= cu
->header
.offset_size
;
23070 struct dwarf2_section_info
*section
;
23071 const char *section_name
;
23073 if (cu
->dwo_unit
!= nullptr)
23075 if (section_is_gnu
)
23077 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
23078 section_name
= ".debug_macro.dwo";
23082 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
23083 section_name
= ".debug_macinfo.dwo";
23088 if (section_is_gnu
)
23090 section
= &dwarf2_per_objfile
->macro
;
23091 section_name
= ".debug_macro";
23095 section
= &dwarf2_per_objfile
->macinfo
;
23096 section_name
= ".debug_macinfo";
23100 section
->read (objfile
);
23101 if (section
->buffer
== nullptr)
23103 complaint (_("missing %s section"), section_name
);
23107 buildsym_compunit
*builder
= cu
->get_builder ();
23109 dwarf_decode_macros (dwarf2_per_objfile
, builder
, section
, lh
,
23110 offset_size
, offset
, section_is_gnu
);
23113 /* Return the .debug_loc section to use for CU.
23114 For DWO files use .debug_loc.dwo. */
23116 static struct dwarf2_section_info
*
23117 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23119 struct dwarf2_per_objfile
*dwarf2_per_objfile
23120 = cu
->per_cu
->dwarf2_per_objfile
;
23124 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23126 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23128 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
23129 : &dwarf2_per_objfile
->loc
);
23132 /* A helper function that fills in a dwarf2_loclist_baton. */
23135 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23136 struct dwarf2_loclist_baton
*baton
,
23137 const struct attribute
*attr
)
23139 struct dwarf2_per_objfile
*dwarf2_per_objfile
23140 = cu
->per_cu
->dwarf2_per_objfile
;
23141 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23143 section
->read (dwarf2_per_objfile
->objfile
);
23145 baton
->per_cu
= cu
->per_cu
;
23146 gdb_assert (baton
->per_cu
);
23147 /* We don't know how long the location list is, but make sure we
23148 don't run off the edge of the section. */
23149 baton
->size
= section
->size
- DW_UNSND (attr
);
23150 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23151 if (cu
->base_address
.has_value ())
23152 baton
->base_address
= *cu
->base_address
;
23154 baton
->base_address
= 0;
23155 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23159 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
23160 struct dwarf2_cu
*cu
, int is_block
)
23162 struct dwarf2_per_objfile
*dwarf2_per_objfile
23163 = cu
->per_cu
->dwarf2_per_objfile
;
23164 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23165 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23167 if (attr
->form_is_section_offset ()
23168 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
23169 the section. If so, fall through to the complaint in the
23171 && DW_UNSND (attr
) < section
->get_size (objfile
))
23173 struct dwarf2_loclist_baton
*baton
;
23175 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
23177 fill_in_loclist_baton (cu
, baton
, attr
);
23179 if (!cu
->base_address
.has_value ())
23180 complaint (_("Location list used without "
23181 "specifying the CU base address."));
23183 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23184 ? dwarf2_loclist_block_index
23185 : dwarf2_loclist_index
);
23186 SYMBOL_LOCATION_BATON (sym
) = baton
;
23190 struct dwarf2_locexpr_baton
*baton
;
23192 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
23193 baton
->per_cu
= cu
->per_cu
;
23194 gdb_assert (baton
->per_cu
);
23196 if (attr
->form_is_block ())
23198 /* Note that we're just copying the block's data pointer
23199 here, not the actual data. We're still pointing into the
23200 info_buffer for SYM's objfile; right now we never release
23201 that buffer, but when we do clean up properly this may
23203 baton
->size
= DW_BLOCK (attr
)->size
;
23204 baton
->data
= DW_BLOCK (attr
)->data
;
23208 dwarf2_invalid_attrib_class_complaint ("location description",
23209 sym
->natural_name ());
23213 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23214 ? dwarf2_locexpr_block_index
23215 : dwarf2_locexpr_index
);
23216 SYMBOL_LOCATION_BATON (sym
) = baton
;
23223 dwarf2_per_cu_data::objfile () const
23225 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23227 /* Return the master objfile, so that we can report and look up the
23228 correct file containing this variable. */
23229 if (objfile
->separate_debug_objfile_backlink
)
23230 objfile
= objfile
->separate_debug_objfile_backlink
;
23235 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
23236 (CU_HEADERP is unused in such case) or prepare a temporary copy at
23237 CU_HEADERP first. */
23239 static const struct comp_unit_head
*
23240 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
23241 const struct dwarf2_per_cu_data
*per_cu
)
23243 const gdb_byte
*info_ptr
;
23246 return &per_cu
->cu
->header
;
23248 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
23250 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
23251 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
23252 rcuh_kind::COMPILE
);
23260 dwarf2_per_cu_data::addr_size () const
23262 struct comp_unit_head cu_header_local
;
23263 const struct comp_unit_head
*cu_headerp
;
23265 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23267 return cu_headerp
->addr_size
;
23273 dwarf2_per_cu_data::offset_size () const
23275 struct comp_unit_head cu_header_local
;
23276 const struct comp_unit_head
*cu_headerp
;
23278 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23280 return cu_headerp
->offset_size
;
23286 dwarf2_per_cu_data::ref_addr_size () const
23288 struct comp_unit_head cu_header_local
;
23289 const struct comp_unit_head
*cu_headerp
;
23291 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23293 if (cu_headerp
->version
== 2)
23294 return cu_headerp
->addr_size
;
23296 return cu_headerp
->offset_size
;
23302 dwarf2_per_cu_data::text_offset () const
23304 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23306 return objfile
->text_section_offset ();
23312 dwarf2_per_cu_data::addr_type () const
23314 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23315 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
23316 struct type
*addr_type
= lookup_pointer_type (void_type
);
23317 int addr_size
= this->addr_size ();
23319 if (TYPE_LENGTH (addr_type
) == addr_size
)
23322 addr_type
= addr_sized_int_type (TYPE_UNSIGNED (addr_type
));
23326 /* A helper function for dwarf2_find_containing_comp_unit that returns
23327 the index of the result, and that searches a vector. It will
23328 return a result even if the offset in question does not actually
23329 occur in any CU. This is separate so that it can be unit
23333 dwarf2_find_containing_comp_unit
23334 (sect_offset sect_off
,
23335 unsigned int offset_in_dwz
,
23336 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
23341 high
= all_comp_units
.size () - 1;
23344 struct dwarf2_per_cu_data
*mid_cu
;
23345 int mid
= low
+ (high
- low
) / 2;
23347 mid_cu
= all_comp_units
[mid
];
23348 if (mid_cu
->is_dwz
> offset_in_dwz
23349 || (mid_cu
->is_dwz
== offset_in_dwz
23350 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
23355 gdb_assert (low
== high
);
23359 /* Locate the .debug_info compilation unit from CU's objfile which contains
23360 the DIE at OFFSET. Raises an error on failure. */
23362 static struct dwarf2_per_cu_data
*
23363 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23364 unsigned int offset_in_dwz
,
23365 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23368 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23369 dwarf2_per_objfile
->all_comp_units
);
23370 struct dwarf2_per_cu_data
*this_cu
23371 = dwarf2_per_objfile
->all_comp_units
[low
];
23373 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
23375 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23376 error (_("Dwarf Error: could not find partial DIE containing "
23377 "offset %s [in module %s]"),
23378 sect_offset_str (sect_off
),
23379 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
23381 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
23383 return dwarf2_per_objfile
->all_comp_units
[low
-1];
23387 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
23388 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23389 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
23390 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23397 namespace selftests
{
23398 namespace find_containing_comp_unit
{
23403 struct dwarf2_per_cu_data one
{};
23404 struct dwarf2_per_cu_data two
{};
23405 struct dwarf2_per_cu_data three
{};
23406 struct dwarf2_per_cu_data four
{};
23409 two
.sect_off
= sect_offset (one
.length
);
23414 four
.sect_off
= sect_offset (three
.length
);
23418 std::vector
<dwarf2_per_cu_data
*> units
;
23419 units
.push_back (&one
);
23420 units
.push_back (&two
);
23421 units
.push_back (&three
);
23422 units
.push_back (&four
);
23426 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
23427 SELF_CHECK (units
[result
] == &one
);
23428 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
23429 SELF_CHECK (units
[result
] == &one
);
23430 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
23431 SELF_CHECK (units
[result
] == &two
);
23433 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
23434 SELF_CHECK (units
[result
] == &three
);
23435 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
23436 SELF_CHECK (units
[result
] == &three
);
23437 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
23438 SELF_CHECK (units
[result
] == &four
);
23444 #endif /* GDB_SELF_TEST */
23446 /* Initialize dwarf2_cu CU, owned by PER_CU. */
23448 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
23449 : per_cu (per_cu_
),
23451 has_loclist (false),
23452 checked_producer (false),
23453 producer_is_gxx_lt_4_6 (false),
23454 producer_is_gcc_lt_4_3 (false),
23455 producer_is_icc (false),
23456 producer_is_icc_lt_14 (false),
23457 producer_is_codewarrior (false),
23458 processing_has_namespace_info (false)
23463 /* Destroy a dwarf2_cu. */
23465 dwarf2_cu::~dwarf2_cu ()
23470 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23473 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23474 enum language pretend_language
)
23476 struct attribute
*attr
;
23478 /* Set the language we're debugging. */
23479 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23480 if (attr
!= nullptr)
23481 set_cu_language (DW_UNSND (attr
), cu
);
23484 cu
->language
= pretend_language
;
23485 cu
->language_defn
= language_def (cu
->language
);
23488 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23491 /* Increase the age counter on each cached compilation unit, and free
23492 any that are too old. */
23495 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23497 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23499 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
23500 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23501 while (per_cu
!= NULL
)
23503 per_cu
->cu
->last_used
++;
23504 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23505 dwarf2_mark (per_cu
->cu
);
23506 per_cu
= per_cu
->cu
->read_in_chain
;
23509 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23510 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23511 while (per_cu
!= NULL
)
23513 struct dwarf2_per_cu_data
*next_cu
;
23515 next_cu
= per_cu
->cu
->read_in_chain
;
23517 if (!per_cu
->cu
->mark
)
23520 *last_chain
= next_cu
;
23523 last_chain
= &per_cu
->cu
->read_in_chain
;
23529 /* Remove a single compilation unit from the cache. */
23532 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
23534 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23535 struct dwarf2_per_objfile
*dwarf2_per_objfile
23536 = target_per_cu
->dwarf2_per_objfile
;
23538 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23539 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23540 while (per_cu
!= NULL
)
23542 struct dwarf2_per_cu_data
*next_cu
;
23544 next_cu
= per_cu
->cu
->read_in_chain
;
23546 if (per_cu
== target_per_cu
)
23550 *last_chain
= next_cu
;
23554 last_chain
= &per_cu
->cu
->read_in_chain
;
23560 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23561 We store these in a hash table separate from the DIEs, and preserve them
23562 when the DIEs are flushed out of cache.
23564 The CU "per_cu" pointer is needed because offset alone is not enough to
23565 uniquely identify the type. A file may have multiple .debug_types sections,
23566 or the type may come from a DWO file. Furthermore, while it's more logical
23567 to use per_cu->section+offset, with Fission the section with the data is in
23568 the DWO file but we don't know that section at the point we need it.
23569 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23570 because we can enter the lookup routine, get_die_type_at_offset, from
23571 outside this file, and thus won't necessarily have PER_CU->cu.
23572 Fortunately, PER_CU is stable for the life of the objfile. */
23574 struct dwarf2_per_cu_offset_and_type
23576 const struct dwarf2_per_cu_data
*per_cu
;
23577 sect_offset sect_off
;
23581 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23584 per_cu_offset_and_type_hash (const void *item
)
23586 const struct dwarf2_per_cu_offset_and_type
*ofs
23587 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23589 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23592 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23595 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23597 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23598 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23599 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23600 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23602 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23603 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23606 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23607 table if necessary. For convenience, return TYPE.
23609 The DIEs reading must have careful ordering to:
23610 * Not cause infinite loops trying to read in DIEs as a prerequisite for
23611 reading current DIE.
23612 * Not trying to dereference contents of still incompletely read in types
23613 while reading in other DIEs.
23614 * Enable referencing still incompletely read in types just by a pointer to
23615 the type without accessing its fields.
23617 Therefore caller should follow these rules:
23618 * Try to fetch any prerequisite types we may need to build this DIE type
23619 before building the type and calling set_die_type.
23620 * After building type call set_die_type for current DIE as soon as
23621 possible before fetching more types to complete the current type.
23622 * Make the type as complete as possible before fetching more types. */
23624 static struct type
*
23625 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23627 struct dwarf2_per_objfile
*dwarf2_per_objfile
23628 = cu
->per_cu
->dwarf2_per_objfile
;
23629 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23630 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23631 struct attribute
*attr
;
23632 struct dynamic_prop prop
;
23634 /* For Ada types, make sure that the gnat-specific data is always
23635 initialized (if not already set). There are a few types where
23636 we should not be doing so, because the type-specific area is
23637 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23638 where the type-specific area is used to store the floatformat).
23639 But this is not a problem, because the gnat-specific information
23640 is actually not needed for these types. */
23641 if (need_gnat_info (cu
)
23642 && TYPE_CODE (type
) != TYPE_CODE_FUNC
23643 && TYPE_CODE (type
) != TYPE_CODE_FLT
23644 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
23645 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
23646 && TYPE_CODE (type
) != TYPE_CODE_METHOD
23647 && !HAVE_GNAT_AUX_INFO (type
))
23648 INIT_GNAT_SPECIFIC (type
);
23650 /* Read DW_AT_allocated and set in type. */
23651 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23652 if (attr
!= NULL
&& attr
->form_is_block ())
23654 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23655 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23656 type
->add_dyn_prop (DYN_PROP_ALLOCATED
, prop
);
23658 else if (attr
!= NULL
)
23660 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
23661 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23662 sect_offset_str (die
->sect_off
));
23665 /* Read DW_AT_associated and set in type. */
23666 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23667 if (attr
!= NULL
&& attr
->form_is_block ())
23669 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23670 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23671 type
->add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
);
23673 else if (attr
!= NULL
)
23675 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
23676 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23677 sect_offset_str (die
->sect_off
));
23680 /* Read DW_AT_data_location and set in type. */
23681 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23682 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
23683 cu
->per_cu
->addr_type ()))
23684 type
->add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
);
23686 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23687 dwarf2_per_objfile
->die_type_hash
23688 = htab_up (htab_create_alloc (127,
23689 per_cu_offset_and_type_hash
,
23690 per_cu_offset_and_type_eq
,
23691 NULL
, xcalloc
, xfree
));
23693 ofs
.per_cu
= cu
->per_cu
;
23694 ofs
.sect_off
= die
->sect_off
;
23696 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23697 htab_find_slot (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
, INSERT
);
23699 complaint (_("A problem internal to GDB: DIE %s has type already set"),
23700 sect_offset_str (die
->sect_off
));
23701 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23702 struct dwarf2_per_cu_offset_and_type
);
23707 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23708 or return NULL if the die does not have a saved type. */
23710 static struct type
*
23711 get_die_type_at_offset (sect_offset sect_off
,
23712 struct dwarf2_per_cu_data
*per_cu
)
23714 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23715 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23717 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23720 ofs
.per_cu
= per_cu
;
23721 ofs
.sect_off
= sect_off
;
23722 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23723 htab_find (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
));
23730 /* Look up the type for DIE in CU in die_type_hash,
23731 or return NULL if DIE does not have a saved type. */
23733 static struct type
*
23734 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23736 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
23739 /* Add a dependence relationship from CU to REF_PER_CU. */
23742 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23743 struct dwarf2_per_cu_data
*ref_per_cu
)
23747 if (cu
->dependencies
== NULL
)
23749 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23750 NULL
, &cu
->comp_unit_obstack
,
23751 hashtab_obstack_allocate
,
23752 dummy_obstack_deallocate
);
23754 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23756 *slot
= ref_per_cu
;
23759 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23760 Set the mark field in every compilation unit in the
23761 cache that we must keep because we are keeping CU. */
23764 dwarf2_mark_helper (void **slot
, void *data
)
23766 struct dwarf2_per_cu_data
*per_cu
;
23768 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23770 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23771 reading of the chain. As such dependencies remain valid it is not much
23772 useful to track and undo them during QUIT cleanups. */
23773 if (per_cu
->cu
== NULL
)
23776 if (per_cu
->cu
->mark
)
23778 per_cu
->cu
->mark
= true;
23780 if (per_cu
->cu
->dependencies
!= NULL
)
23781 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23786 /* Set the mark field in CU and in every other compilation unit in the
23787 cache that we must keep because we are keeping CU. */
23790 dwarf2_mark (struct dwarf2_cu
*cu
)
23795 if (cu
->dependencies
!= NULL
)
23796 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23800 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23804 per_cu
->cu
->mark
= false;
23805 per_cu
= per_cu
->cu
->read_in_chain
;
23809 /* Trivial hash function for partial_die_info: the hash value of a DIE
23810 is its offset in .debug_info for this objfile. */
23813 partial_die_hash (const void *item
)
23815 const struct partial_die_info
*part_die
23816 = (const struct partial_die_info
*) item
;
23818 return to_underlying (part_die
->sect_off
);
23821 /* Trivial comparison function for partial_die_info structures: two DIEs
23822 are equal if they have the same offset. */
23825 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23827 const struct partial_die_info
*part_die_lhs
23828 = (const struct partial_die_info
*) item_lhs
;
23829 const struct partial_die_info
*part_die_rhs
23830 = (const struct partial_die_info
*) item_rhs
;
23832 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23835 struct cmd_list_element
*set_dwarf_cmdlist
;
23836 struct cmd_list_element
*show_dwarf_cmdlist
;
23839 show_check_physname (struct ui_file
*file
, int from_tty
,
23840 struct cmd_list_element
*c
, const char *value
)
23842 fprintf_filtered (file
,
23843 _("Whether to check \"physname\" is %s.\n"),
23847 void _initialize_dwarf2_read ();
23849 _initialize_dwarf2_read ()
23851 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
23852 Set DWARF specific variables.\n\
23853 Configure DWARF variables such as the cache size."),
23854 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23855 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23857 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
23858 Show DWARF specific variables.\n\
23859 Show DWARF variables such as the cache size."),
23860 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23861 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23863 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23864 &dwarf_max_cache_age
, _("\
23865 Set the upper bound on the age of cached DWARF compilation units."), _("\
23866 Show the upper bound on the age of cached DWARF compilation units."), _("\
23867 A higher limit means that cached compilation units will be stored\n\
23868 in memory longer, and more total memory will be used. Zero disables\n\
23869 caching, which can slow down startup."),
23871 show_dwarf_max_cache_age
,
23872 &set_dwarf_cmdlist
,
23873 &show_dwarf_cmdlist
);
23875 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23876 Set debugging of the DWARF reader."), _("\
23877 Show debugging of the DWARF reader."), _("\
23878 When enabled (non-zero), debugging messages are printed during DWARF\n\
23879 reading and symtab expansion. A value of 1 (one) provides basic\n\
23880 information. A value greater than 1 provides more verbose information."),
23883 &setdebuglist
, &showdebuglist
);
23885 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23886 Set debugging of the DWARF DIE reader."), _("\
23887 Show debugging of the DWARF DIE reader."), _("\
23888 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23889 The value is the maximum depth to print."),
23892 &setdebuglist
, &showdebuglist
);
23894 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23895 Set debugging of the dwarf line reader."), _("\
23896 Show debugging of the dwarf line reader."), _("\
23897 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23898 A value of 1 (one) provides basic information.\n\
23899 A value greater than 1 provides more verbose information."),
23902 &setdebuglist
, &showdebuglist
);
23904 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23905 Set cross-checking of \"physname\" code against demangler."), _("\
23906 Show cross-checking of \"physname\" code against demangler."), _("\
23907 When enabled, GDB's internal \"physname\" code is checked against\n\
23909 NULL
, show_check_physname
,
23910 &setdebuglist
, &showdebuglist
);
23912 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23913 no_class
, &use_deprecated_index_sections
, _("\
23914 Set whether to use deprecated gdb_index sections."), _("\
23915 Show whether to use deprecated gdb_index sections."), _("\
23916 When enabled, deprecated .gdb_index sections are used anyway.\n\
23917 Normally they are ignored either because of a missing feature or\n\
23918 performance issue.\n\
23919 Warning: This option must be enabled before gdb reads the file."),
23922 &setlist
, &showlist
);
23924 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23925 &dwarf2_locexpr_funcs
);
23926 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23927 &dwarf2_loclist_funcs
);
23929 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23930 &dwarf2_block_frame_base_locexpr_funcs
);
23931 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23932 &dwarf2_block_frame_base_loclist_funcs
);
23935 selftests::register_test ("dw2_expand_symtabs_matching",
23936 selftests::dw2_expand_symtabs_matching::run_test
);
23937 selftests::register_test ("dwarf2_find_containing_comp_unit",
23938 selftests::find_containing_comp_unit::run_test
);