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 sect_offset sect_off_prev
;
5026 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5028 sect_offset sect_off_next
;
5029 if (i
< map
.cu_count
)
5032 = (sect_offset
) (extract_unsigned_integer
5033 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5035 map
.dwarf5_byte_order
));
5038 sect_off_next
= (sect_offset
) section
.size
;
5041 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5042 dwarf2_per_cu_data
*per_cu
5043 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5044 sect_off_prev
, length
);
5045 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5047 sect_off_prev
= sect_off_next
;
5051 /* Read the CU list from the mapped index, and use it to create all
5052 the CU objects for this dwarf2_per_objfile. */
5055 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5056 const mapped_debug_names
&map
,
5057 const mapped_debug_names
&dwz_map
)
5059 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5060 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5062 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5063 dwarf2_per_objfile
->info
,
5064 false /* is_dwz */);
5066 if (dwz_map
.cu_count
== 0)
5069 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5070 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5074 /* Read .debug_names. If everything went ok, initialize the "quick"
5075 elements of all the CUs and return true. Otherwise, return false. */
5078 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5080 std::unique_ptr
<mapped_debug_names
> map
5081 (new mapped_debug_names (dwarf2_per_objfile
));
5082 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5083 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5085 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5086 &dwarf2_per_objfile
->debug_names
,
5090 /* Don't use the index if it's empty. */
5091 if (map
->name_count
== 0)
5094 /* If there is a .dwz file, read it so we can get its CU list as
5096 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5099 if (!read_debug_names_from_section (objfile
,
5100 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5101 &dwz
->debug_names
, dwz_map
))
5103 warning (_("could not read '.debug_names' section from %s; skipping"),
5104 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5109 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5111 if (map
->tu_count
!= 0)
5113 /* We can only handle a single .debug_types when we have an
5115 if (dwarf2_per_objfile
->types
.size () != 1)
5118 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
5120 create_signatured_type_table_from_debug_names
5121 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5124 create_addrmap_from_aranges (dwarf2_per_objfile
,
5125 &dwarf2_per_objfile
->debug_aranges
);
5127 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5128 dwarf2_per_objfile
->using_index
= 1;
5129 dwarf2_per_objfile
->quick_file_names_table
=
5130 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5135 /* Type used to manage iterating over all CUs looking for a symbol for
5138 class dw2_debug_names_iterator
5141 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5142 gdb::optional
<block_enum
> block_index
,
5145 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5146 m_addr (find_vec_in_debug_names (map
, name
))
5149 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5150 search_domain search
, uint32_t namei
)
5153 m_addr (find_vec_in_debug_names (map
, namei
))
5156 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5157 block_enum block_index
, domain_enum domain
,
5159 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5160 m_addr (find_vec_in_debug_names (map
, namei
))
5163 /* Return the next matching CU or NULL if there are no more. */
5164 dwarf2_per_cu_data
*next ();
5167 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5169 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5172 /* The internalized form of .debug_names. */
5173 const mapped_debug_names
&m_map
;
5175 /* If set, only look for symbols that match that block. Valid values are
5176 GLOBAL_BLOCK and STATIC_BLOCK. */
5177 const gdb::optional
<block_enum
> m_block_index
;
5179 /* The kind of symbol we're looking for. */
5180 const domain_enum m_domain
= UNDEF_DOMAIN
;
5181 const search_domain m_search
= ALL_DOMAIN
;
5183 /* The list of CUs from the index entry of the symbol, or NULL if
5185 const gdb_byte
*m_addr
;
5189 mapped_debug_names::namei_to_name (uint32_t namei
) const
5191 const ULONGEST namei_string_offs
5192 = extract_unsigned_integer ((name_table_string_offs_reordered
5193 + namei
* offset_size
),
5196 return read_indirect_string_at_offset (dwarf2_per_objfile
,
5200 /* Find a slot in .debug_names for the object named NAME. If NAME is
5201 found, return pointer to its pool data. If NAME cannot be found,
5205 dw2_debug_names_iterator::find_vec_in_debug_names
5206 (const mapped_debug_names
&map
, const char *name
)
5208 int (*cmp
) (const char *, const char *);
5210 gdb::unique_xmalloc_ptr
<char> without_params
;
5211 if (current_language
->la_language
== language_cplus
5212 || current_language
->la_language
== language_fortran
5213 || current_language
->la_language
== language_d
)
5215 /* NAME is already canonical. Drop any qualifiers as
5216 .debug_names does not contain any. */
5218 if (strchr (name
, '(') != NULL
)
5220 without_params
= cp_remove_params (name
);
5221 if (without_params
!= NULL
)
5222 name
= without_params
.get ();
5226 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5228 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5230 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5231 (map
.bucket_table_reordered
5232 + (full_hash
% map
.bucket_count
)), 4,
5233 map
.dwarf5_byte_order
);
5237 if (namei
>= map
.name_count
)
5239 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5241 namei
, map
.name_count
,
5242 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5248 const uint32_t namei_full_hash
5249 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5250 (map
.hash_table_reordered
+ namei
), 4,
5251 map
.dwarf5_byte_order
);
5252 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5255 if (full_hash
== namei_full_hash
)
5257 const char *const namei_string
= map
.namei_to_name (namei
);
5259 #if 0 /* An expensive sanity check. */
5260 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5262 complaint (_("Wrong .debug_names hash for string at index %u "
5264 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5269 if (cmp (namei_string
, name
) == 0)
5271 const ULONGEST namei_entry_offs
5272 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5273 + namei
* map
.offset_size
),
5274 map
.offset_size
, map
.dwarf5_byte_order
);
5275 return map
.entry_pool
+ namei_entry_offs
;
5280 if (namei
>= map
.name_count
)
5286 dw2_debug_names_iterator::find_vec_in_debug_names
5287 (const mapped_debug_names
&map
, uint32_t namei
)
5289 if (namei
>= map
.name_count
)
5291 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5293 namei
, map
.name_count
,
5294 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5298 const ULONGEST namei_entry_offs
5299 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5300 + namei
* map
.offset_size
),
5301 map
.offset_size
, map
.dwarf5_byte_order
);
5302 return map
.entry_pool
+ namei_entry_offs
;
5305 /* See dw2_debug_names_iterator. */
5307 dwarf2_per_cu_data
*
5308 dw2_debug_names_iterator::next ()
5313 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5314 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5315 bfd
*const abfd
= objfile
->obfd
;
5319 unsigned int bytes_read
;
5320 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5321 m_addr
+= bytes_read
;
5325 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5326 if (indexval_it
== m_map
.abbrev_map
.cend ())
5328 complaint (_("Wrong .debug_names undefined abbrev code %s "
5330 pulongest (abbrev
), objfile_name (objfile
));
5333 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5334 enum class symbol_linkage
{
5338 } symbol_linkage_
= symbol_linkage::unknown
;
5339 dwarf2_per_cu_data
*per_cu
= NULL
;
5340 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5345 case DW_FORM_implicit_const
:
5346 ull
= attr
.implicit_const
;
5348 case DW_FORM_flag_present
:
5352 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5353 m_addr
+= bytes_read
;
5356 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5357 dwarf_form_name (attr
.form
),
5358 objfile_name (objfile
));
5361 switch (attr
.dw_idx
)
5363 case DW_IDX_compile_unit
:
5364 /* Don't crash on bad data. */
5365 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5367 complaint (_(".debug_names entry has bad CU index %s"
5370 objfile_name (dwarf2_per_objfile
->objfile
));
5373 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5375 case DW_IDX_type_unit
:
5376 /* Don't crash on bad data. */
5377 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5379 complaint (_(".debug_names entry has bad TU index %s"
5382 objfile_name (dwarf2_per_objfile
->objfile
));
5385 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5387 case DW_IDX_GNU_internal
:
5388 if (!m_map
.augmentation_is_gdb
)
5390 symbol_linkage_
= symbol_linkage::static_
;
5392 case DW_IDX_GNU_external
:
5393 if (!m_map
.augmentation_is_gdb
)
5395 symbol_linkage_
= symbol_linkage::extern_
;
5400 /* Skip if already read in. */
5401 if (per_cu
->v
.quick
->compunit_symtab
)
5404 /* Check static vs global. */
5405 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5407 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5408 const bool symbol_is_static
=
5409 symbol_linkage_
== symbol_linkage::static_
;
5410 if (want_static
!= symbol_is_static
)
5414 /* Match dw2_symtab_iter_next, symbol_kind
5415 and debug_names::psymbol_tag. */
5419 switch (indexval
.dwarf_tag
)
5421 case DW_TAG_variable
:
5422 case DW_TAG_subprogram
:
5423 /* Some types are also in VAR_DOMAIN. */
5424 case DW_TAG_typedef
:
5425 case DW_TAG_structure_type
:
5432 switch (indexval
.dwarf_tag
)
5434 case DW_TAG_typedef
:
5435 case DW_TAG_structure_type
:
5442 switch (indexval
.dwarf_tag
)
5445 case DW_TAG_variable
:
5452 switch (indexval
.dwarf_tag
)
5464 /* Match dw2_expand_symtabs_matching, symbol_kind and
5465 debug_names::psymbol_tag. */
5468 case VARIABLES_DOMAIN
:
5469 switch (indexval
.dwarf_tag
)
5471 case DW_TAG_variable
:
5477 case FUNCTIONS_DOMAIN
:
5478 switch (indexval
.dwarf_tag
)
5480 case DW_TAG_subprogram
:
5487 switch (indexval
.dwarf_tag
)
5489 case DW_TAG_typedef
:
5490 case DW_TAG_structure_type
:
5496 case MODULES_DOMAIN
:
5497 switch (indexval
.dwarf_tag
)
5511 static struct compunit_symtab
*
5512 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5513 const char *name
, domain_enum domain
)
5515 struct dwarf2_per_objfile
*dwarf2_per_objfile
5516 = get_dwarf2_per_objfile (objfile
);
5518 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
5521 /* index is NULL if OBJF_READNOW. */
5524 const auto &map
= *mapp
;
5526 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
5528 struct compunit_symtab
*stab_best
= NULL
;
5529 struct dwarf2_per_cu_data
*per_cu
;
5530 while ((per_cu
= iter
.next ()) != NULL
)
5532 struct symbol
*sym
, *with_opaque
= NULL
;
5533 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
5534 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5535 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5537 sym
= block_find_symbol (block
, name
, domain
,
5538 block_find_non_opaque_type_preferred
,
5541 /* Some caution must be observed with overloaded functions and
5542 methods, since the index will not contain any overload
5543 information (but NAME might contain it). */
5546 && strcmp_iw (sym
->search_name (), name
) == 0)
5548 if (with_opaque
!= NULL
5549 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5552 /* Keep looking through other CUs. */
5558 /* This dumps minimal information about .debug_names. It is called
5559 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5560 uses this to verify that .debug_names has been loaded. */
5563 dw2_debug_names_dump (struct objfile
*objfile
)
5565 struct dwarf2_per_objfile
*dwarf2_per_objfile
5566 = get_dwarf2_per_objfile (objfile
);
5568 gdb_assert (dwarf2_per_objfile
->using_index
);
5569 printf_filtered (".debug_names:");
5570 if (dwarf2_per_objfile
->debug_names_table
)
5571 printf_filtered (" exists\n");
5573 printf_filtered (" faked for \"readnow\"\n");
5574 printf_filtered ("\n");
5578 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5579 const char *func_name
)
5581 struct dwarf2_per_objfile
*dwarf2_per_objfile
5582 = get_dwarf2_per_objfile (objfile
);
5584 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
5585 if (dwarf2_per_objfile
->debug_names_table
)
5587 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5589 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
5591 struct dwarf2_per_cu_data
*per_cu
;
5592 while ((per_cu
= iter
.next ()) != NULL
)
5593 dw2_instantiate_symtab (per_cu
, false);
5598 dw2_debug_names_map_matching_symbols
5599 (struct objfile
*objfile
,
5600 const lookup_name_info
&name
, domain_enum domain
,
5602 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5603 symbol_compare_ftype
*ordered_compare
)
5605 struct dwarf2_per_objfile
*dwarf2_per_objfile
5606 = get_dwarf2_per_objfile (objfile
);
5608 /* debug_names_table is NULL if OBJF_READNOW. */
5609 if (!dwarf2_per_objfile
->debug_names_table
)
5612 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5613 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5615 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5616 auto matcher
= [&] (const char *symname
)
5618 if (ordered_compare
== nullptr)
5620 return ordered_compare (symname
, match_name
) == 0;
5623 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5624 [&] (offset_type namei
)
5626 /* The name was matched, now expand corresponding CUs that were
5628 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
5630 struct dwarf2_per_cu_data
*per_cu
;
5631 while ((per_cu
= iter
.next ()) != NULL
)
5632 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
5636 /* It's a shame we couldn't do this inside the
5637 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5638 that have already been expanded. Instead, this loop matches what
5639 the psymtab code does. */
5640 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5642 struct compunit_symtab
*cust
= per_cu
->v
.quick
->compunit_symtab
;
5643 if (cust
!= nullptr)
5645 const struct block
*block
5646 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
5647 if (!iterate_over_symbols_terminated (block
, name
,
5655 dw2_debug_names_expand_symtabs_matching
5656 (struct objfile
*objfile
,
5657 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5658 const lookup_name_info
*lookup_name
,
5659 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5660 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5661 enum search_domain kind
)
5663 struct dwarf2_per_objfile
*dwarf2_per_objfile
5664 = get_dwarf2_per_objfile (objfile
);
5666 /* debug_names_table is NULL if OBJF_READNOW. */
5667 if (!dwarf2_per_objfile
->debug_names_table
)
5670 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5672 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
5674 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5678 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5684 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5686 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
5688 kind
, [&] (offset_type namei
)
5690 /* The name was matched, now expand corresponding CUs that were
5692 dw2_debug_names_iterator
iter (map
, kind
, namei
);
5694 struct dwarf2_per_cu_data
*per_cu
;
5695 while ((per_cu
= iter
.next ()) != NULL
)
5696 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5702 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5705 dw2_find_last_source_symtab
,
5706 dw2_forget_cached_source_info
,
5707 dw2_map_symtabs_matching_filename
,
5708 dw2_debug_names_lookup_symbol
,
5711 dw2_debug_names_dump
,
5712 dw2_debug_names_expand_symtabs_for_function
,
5713 dw2_expand_all_symtabs
,
5714 dw2_expand_symtabs_with_fullname
,
5715 dw2_debug_names_map_matching_symbols
,
5716 dw2_debug_names_expand_symtabs_matching
,
5717 dw2_find_pc_sect_compunit_symtab
,
5719 dw2_map_symbol_filenames
5722 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5723 to either a dwarf2_per_objfile or dwz_file object. */
5725 template <typename T
>
5726 static gdb::array_view
<const gdb_byte
>
5727 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5729 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5731 if (section
->empty ())
5734 /* Older elfutils strip versions could keep the section in the main
5735 executable while splitting it for the separate debug info file. */
5736 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5739 section
->read (obj
);
5741 /* dwarf2_section_info::size is a bfd_size_type, while
5742 gdb::array_view works with size_t. On 32-bit hosts, with
5743 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5744 is 32-bit. So we need an explicit narrowing conversion here.
5745 This is fine, because it's impossible to allocate or mmap an
5746 array/buffer larger than what size_t can represent. */
5747 return gdb::make_array_view (section
->buffer
, section
->size
);
5750 /* Lookup the index cache for the contents of the index associated to
5753 static gdb::array_view
<const gdb_byte
>
5754 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
5756 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5757 if (build_id
== nullptr)
5760 return global_index_cache
.lookup_gdb_index (build_id
,
5761 &dwarf2_obj
->index_cache_res
);
5764 /* Same as the above, but for DWZ. */
5766 static gdb::array_view
<const gdb_byte
>
5767 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5769 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5770 if (build_id
== nullptr)
5773 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5776 /* See symfile.h. */
5779 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
5781 struct dwarf2_per_objfile
*dwarf2_per_objfile
5782 = get_dwarf2_per_objfile (objfile
);
5784 /* If we're about to read full symbols, don't bother with the
5785 indices. In this case we also don't care if some other debug
5786 format is making psymtabs, because they are all about to be
5788 if ((objfile
->flags
& OBJF_READNOW
))
5790 dwarf2_per_objfile
->using_index
= 1;
5791 create_all_comp_units (dwarf2_per_objfile
);
5792 create_all_type_units (dwarf2_per_objfile
);
5793 dwarf2_per_objfile
->quick_file_names_table
5794 = create_quick_file_names_table
5795 (dwarf2_per_objfile
->all_comp_units
.size ());
5797 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
5798 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
5800 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
5802 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5803 struct dwarf2_per_cu_quick_data
);
5806 /* Return 1 so that gdb sees the "quick" functions. However,
5807 these functions will be no-ops because we will have expanded
5809 *index_kind
= dw_index_kind::GDB_INDEX
;
5813 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
5815 *index_kind
= dw_index_kind::DEBUG_NAMES
;
5819 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5820 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
5821 get_gdb_index_contents_from_section
<dwz_file
>))
5823 *index_kind
= dw_index_kind::GDB_INDEX
;
5827 /* ... otherwise, try to find the index in the index cache. */
5828 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5829 get_gdb_index_contents_from_cache
,
5830 get_gdb_index_contents_from_cache_dwz
))
5832 global_index_cache
.hit ();
5833 *index_kind
= dw_index_kind::GDB_INDEX
;
5837 global_index_cache
.miss ();
5843 /* Build a partial symbol table. */
5846 dwarf2_build_psymtabs (struct objfile
*objfile
)
5848 struct dwarf2_per_objfile
*dwarf2_per_objfile
5849 = get_dwarf2_per_objfile (objfile
);
5851 init_psymbol_list (objfile
, 1024);
5855 /* This isn't really ideal: all the data we allocate on the
5856 objfile's obstack is still uselessly kept around. However,
5857 freeing it seems unsafe. */
5858 psymtab_discarder
psymtabs (objfile
);
5859 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
5862 /* (maybe) store an index in the cache. */
5863 global_index_cache
.store (dwarf2_per_objfile
);
5865 catch (const gdb_exception_error
&except
)
5867 exception_print (gdb_stderr
, except
);
5871 /* Find the base address of the compilation unit for range lists and
5872 location lists. It will normally be specified by DW_AT_low_pc.
5873 In DWARF-3 draft 4, the base address could be overridden by
5874 DW_AT_entry_pc. It's been removed, but GCC still uses this for
5875 compilation units with discontinuous ranges. */
5878 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
5880 struct attribute
*attr
;
5882 cu
->base_address
.reset ();
5884 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
5885 if (attr
!= nullptr)
5886 cu
->base_address
= attr
->value_as_address ();
5889 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5890 if (attr
!= nullptr)
5891 cu
->base_address
= attr
->value_as_address ();
5895 /* Helper function that returns the proper abbrev section for
5898 static struct dwarf2_section_info
*
5899 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
5901 struct dwarf2_section_info
*abbrev
;
5902 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
5904 if (this_cu
->is_dwz
)
5905 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
5907 abbrev
= &dwarf2_per_objfile
->abbrev
;
5912 /* Fetch the abbreviation table offset from a comp or type unit header. */
5915 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5916 struct dwarf2_section_info
*section
,
5917 sect_offset sect_off
)
5919 bfd
*abfd
= section
->get_bfd_owner ();
5920 const gdb_byte
*info_ptr
;
5921 unsigned int initial_length_size
, offset_size
;
5924 section
->read (dwarf2_per_objfile
->objfile
);
5925 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
5926 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5927 offset_size
= initial_length_size
== 4 ? 4 : 8;
5928 info_ptr
+= initial_length_size
;
5930 version
= read_2_bytes (abfd
, info_ptr
);
5934 /* Skip unit type and address size. */
5938 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
5941 /* A partial symtab that is used only for include files. */
5942 struct dwarf2_include_psymtab
: public partial_symtab
5944 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
5945 : partial_symtab (filename
, objfile
)
5949 void read_symtab (struct objfile
*objfile
) override
5951 /* It's an include file, no symbols to read for it.
5952 Everything is in the includer symtab. */
5954 /* The expansion of a dwarf2_include_psymtab is just a trigger for
5955 expansion of the includer psymtab. We use the dependencies[0] field to
5956 model the includer. But if we go the regular route of calling
5957 expand_psymtab here, and having expand_psymtab call expand_dependencies
5958 to expand the includer, we'll only use expand_psymtab on the includer
5959 (making it a non-toplevel psymtab), while if we expand the includer via
5960 another path, we'll use read_symtab (making it a toplevel psymtab).
5961 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
5962 psymtab, and trigger read_symtab on the includer here directly. */
5963 includer ()->read_symtab (objfile
);
5966 void expand_psymtab (struct objfile
*objfile
) override
5968 /* This is not called by read_symtab, and should not be called by any
5969 expand_dependencies. */
5973 bool readin_p () const override
5975 return includer ()->readin_p ();
5978 struct compunit_symtab
*get_compunit_symtab () const override
5984 partial_symtab
*includer () const
5986 /* An include psymtab has exactly one dependency: the psymtab that
5988 gdb_assert (this->number_of_dependencies
== 1);
5989 return this->dependencies
[0];
5993 /* Allocate a new partial symtab for file named NAME and mark this new
5994 partial symtab as being an include of PST. */
5997 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
5998 struct objfile
*objfile
)
6000 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
6002 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6004 /* It shares objfile->objfile_obstack. */
6005 subpst
->dirname
= pst
->dirname
;
6008 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6009 subpst
->dependencies
[0] = pst
;
6010 subpst
->number_of_dependencies
= 1;
6013 /* Read the Line Number Program data and extract the list of files
6014 included by the source file represented by PST. Build an include
6015 partial symtab for each of these included files. */
6018 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6019 struct die_info
*die
,
6020 dwarf2_psymtab
*pst
)
6023 struct attribute
*attr
;
6025 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6026 if (attr
!= nullptr)
6027 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6029 return; /* No linetable, so no includes. */
6031 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6032 that we pass in the raw text_low here; that is ok because we're
6033 only decoding the line table to make include partial symtabs, and
6034 so the addresses aren't really used. */
6035 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6036 pst
->raw_text_low (), 1);
6040 hash_signatured_type (const void *item
)
6042 const struct signatured_type
*sig_type
6043 = (const struct signatured_type
*) item
;
6045 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6046 return sig_type
->signature
;
6050 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6052 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6053 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6055 return lhs
->signature
== rhs
->signature
;
6058 /* Allocate a hash table for signatured types. */
6061 allocate_signatured_type_table ()
6063 return htab_up (htab_create_alloc (41,
6064 hash_signatured_type
,
6066 NULL
, xcalloc
, xfree
));
6069 /* A helper function to add a signatured type CU to a table. */
6072 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6074 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6075 std::vector
<signatured_type
*> *all_type_units
6076 = (std::vector
<signatured_type
*> *) datum
;
6078 all_type_units
->push_back (sigt
);
6083 /* A helper for create_debug_types_hash_table. Read types from SECTION
6084 and fill them into TYPES_HTAB. It will process only type units,
6085 therefore DW_UT_type. */
6088 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6089 struct dwo_file
*dwo_file
,
6090 dwarf2_section_info
*section
, htab_up
&types_htab
,
6091 rcuh_kind section_kind
)
6093 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6094 struct dwarf2_section_info
*abbrev_section
;
6096 const gdb_byte
*info_ptr
, *end_ptr
;
6098 abbrev_section
= (dwo_file
!= NULL
6099 ? &dwo_file
->sections
.abbrev
6100 : &dwarf2_per_objfile
->abbrev
);
6102 if (dwarf_read_debug
)
6103 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6104 section
->get_name (),
6105 abbrev_section
->get_file_name ());
6107 section
->read (objfile
);
6108 info_ptr
= section
->buffer
;
6110 if (info_ptr
== NULL
)
6113 /* We can't set abfd until now because the section may be empty or
6114 not present, in which case the bfd is unknown. */
6115 abfd
= section
->get_bfd_owner ();
6117 /* We don't use cutu_reader here because we don't need to read
6118 any dies: the signature is in the header. */
6120 end_ptr
= info_ptr
+ section
->size
;
6121 while (info_ptr
< end_ptr
)
6123 struct signatured_type
*sig_type
;
6124 struct dwo_unit
*dwo_tu
;
6126 const gdb_byte
*ptr
= info_ptr
;
6127 struct comp_unit_head header
;
6128 unsigned int length
;
6130 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6132 /* Initialize it due to a false compiler warning. */
6133 header
.signature
= -1;
6134 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6136 /* We need to read the type's signature in order to build the hash
6137 table, but we don't need anything else just yet. */
6139 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6140 abbrev_section
, ptr
, section_kind
);
6142 length
= header
.get_length ();
6144 /* Skip dummy type units. */
6145 if (ptr
>= info_ptr
+ length
6146 || peek_abbrev_code (abfd
, ptr
) == 0
6147 || header
.unit_type
!= DW_UT_type
)
6153 if (types_htab
== NULL
)
6156 types_htab
= allocate_dwo_unit_table ();
6158 types_htab
= allocate_signatured_type_table ();
6164 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6166 dwo_tu
->dwo_file
= dwo_file
;
6167 dwo_tu
->signature
= header
.signature
;
6168 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6169 dwo_tu
->section
= section
;
6170 dwo_tu
->sect_off
= sect_off
;
6171 dwo_tu
->length
= length
;
6175 /* N.B.: type_offset is not usable if this type uses a DWO file.
6176 The real type_offset is in the DWO file. */
6178 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6179 struct signatured_type
);
6180 sig_type
->signature
= header
.signature
;
6181 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6182 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6183 sig_type
->per_cu
.is_debug_types
= 1;
6184 sig_type
->per_cu
.section
= section
;
6185 sig_type
->per_cu
.sect_off
= sect_off
;
6186 sig_type
->per_cu
.length
= length
;
6189 slot
= htab_find_slot (types_htab
.get (),
6190 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6192 gdb_assert (slot
!= NULL
);
6195 sect_offset dup_sect_off
;
6199 const struct dwo_unit
*dup_tu
6200 = (const struct dwo_unit
*) *slot
;
6202 dup_sect_off
= dup_tu
->sect_off
;
6206 const struct signatured_type
*dup_tu
6207 = (const struct signatured_type
*) *slot
;
6209 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6212 complaint (_("debug type entry at offset %s is duplicate to"
6213 " the entry at offset %s, signature %s"),
6214 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6215 hex_string (header
.signature
));
6217 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6219 if (dwarf_read_debug
> 1)
6220 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6221 sect_offset_str (sect_off
),
6222 hex_string (header
.signature
));
6228 /* Create the hash table of all entries in the .debug_types
6229 (or .debug_types.dwo) section(s).
6230 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6231 otherwise it is NULL.
6233 The result is a pointer to the hash table or NULL if there are no types.
6235 Note: This function processes DWO files only, not DWP files. */
6238 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6239 struct dwo_file
*dwo_file
,
6240 gdb::array_view
<dwarf2_section_info
> type_sections
,
6241 htab_up
&types_htab
)
6243 for (dwarf2_section_info
§ion
: type_sections
)
6244 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6245 types_htab
, rcuh_kind::TYPE
);
6248 /* Create the hash table of all entries in the .debug_types section,
6249 and initialize all_type_units.
6250 The result is zero if there is an error (e.g. missing .debug_types section),
6251 otherwise non-zero. */
6254 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6258 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6259 &dwarf2_per_objfile
->info
, types_htab
,
6260 rcuh_kind::COMPILE
);
6261 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6262 dwarf2_per_objfile
->types
, types_htab
);
6263 if (types_htab
== NULL
)
6265 dwarf2_per_objfile
->signatured_types
= NULL
;
6269 dwarf2_per_objfile
->signatured_types
= std::move (types_htab
);
6271 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6272 dwarf2_per_objfile
->all_type_units
.reserve
6273 (htab_elements (dwarf2_per_objfile
->signatured_types
.get ()));
6275 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
.get (),
6276 add_signatured_type_cu_to_table
,
6277 &dwarf2_per_objfile
->all_type_units
);
6282 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6283 If SLOT is non-NULL, it is the entry to use in the hash table.
6284 Otherwise we find one. */
6286 static struct signatured_type
*
6287 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6290 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6292 if (dwarf2_per_objfile
->all_type_units
.size ()
6293 == dwarf2_per_objfile
->all_type_units
.capacity ())
6294 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6296 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6297 struct signatured_type
);
6299 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6300 sig_type
->signature
= sig
;
6301 sig_type
->per_cu
.is_debug_types
= 1;
6302 if (dwarf2_per_objfile
->using_index
)
6304 sig_type
->per_cu
.v
.quick
=
6305 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6306 struct dwarf2_per_cu_quick_data
);
6311 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6314 gdb_assert (*slot
== NULL
);
6316 /* The rest of sig_type must be filled in by the caller. */
6320 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6321 Fill in SIG_ENTRY with DWO_ENTRY. */
6324 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6325 struct signatured_type
*sig_entry
,
6326 struct dwo_unit
*dwo_entry
)
6328 /* Make sure we're not clobbering something we don't expect to. */
6329 gdb_assert (! sig_entry
->per_cu
.queued
);
6330 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6331 if (dwarf2_per_objfile
->using_index
)
6333 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6334 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6337 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6338 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6339 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6340 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6341 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6343 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6344 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6345 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6346 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6347 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6348 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6349 sig_entry
->dwo_unit
= dwo_entry
;
6352 /* Subroutine of lookup_signatured_type.
6353 If we haven't read the TU yet, create the signatured_type data structure
6354 for a TU to be read in directly from a DWO file, bypassing the stub.
6355 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6356 using .gdb_index, then when reading a CU we want to stay in the DWO file
6357 containing that CU. Otherwise we could end up reading several other DWO
6358 files (due to comdat folding) to process the transitive closure of all the
6359 mentioned TUs, and that can be slow. The current DWO file will have every
6360 type signature that it needs.
6361 We only do this for .gdb_index because in the psymtab case we already have
6362 to read all the DWOs to build the type unit groups. */
6364 static struct signatured_type
*
6365 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6367 struct dwarf2_per_objfile
*dwarf2_per_objfile
6368 = cu
->per_cu
->dwarf2_per_objfile
;
6369 struct dwo_file
*dwo_file
;
6370 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6371 struct signatured_type find_sig_entry
, *sig_entry
;
6374 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6376 /* If TU skeletons have been removed then we may not have read in any
6378 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6379 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6381 /* We only ever need to read in one copy of a signatured type.
6382 Use the global signatured_types array to do our own comdat-folding
6383 of types. If this is the first time we're reading this TU, and
6384 the TU has an entry in .gdb_index, replace the recorded data from
6385 .gdb_index with this TU. */
6387 find_sig_entry
.signature
= sig
;
6388 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6389 &find_sig_entry
, INSERT
);
6390 sig_entry
= (struct signatured_type
*) *slot
;
6392 /* We can get here with the TU already read, *or* in the process of being
6393 read. Don't reassign the global entry to point to this DWO if that's
6394 the case. Also note that if the TU is already being read, it may not
6395 have come from a DWO, the program may be a mix of Fission-compiled
6396 code and non-Fission-compiled code. */
6398 /* Have we already tried to read this TU?
6399 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6400 needn't exist in the global table yet). */
6401 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6404 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6405 dwo_unit of the TU itself. */
6406 dwo_file
= cu
->dwo_unit
->dwo_file
;
6408 /* Ok, this is the first time we're reading this TU. */
6409 if (dwo_file
->tus
== NULL
)
6411 find_dwo_entry
.signature
= sig
;
6412 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6414 if (dwo_entry
== NULL
)
6417 /* If the global table doesn't have an entry for this TU, add one. */
6418 if (sig_entry
== NULL
)
6419 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6421 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6422 sig_entry
->per_cu
.tu_read
= 1;
6426 /* Subroutine of lookup_signatured_type.
6427 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6428 then try the DWP file. If the TU stub (skeleton) has been removed then
6429 it won't be in .gdb_index. */
6431 static struct signatured_type
*
6432 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6434 struct dwarf2_per_objfile
*dwarf2_per_objfile
6435 = cu
->per_cu
->dwarf2_per_objfile
;
6436 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6437 struct dwo_unit
*dwo_entry
;
6438 struct signatured_type find_sig_entry
, *sig_entry
;
6441 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6442 gdb_assert (dwp_file
!= NULL
);
6444 /* If TU skeletons have been removed then we may not have read in any
6446 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6447 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6449 find_sig_entry
.signature
= sig
;
6450 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6451 &find_sig_entry
, INSERT
);
6452 sig_entry
= (struct signatured_type
*) *slot
;
6454 /* Have we already tried to read this TU?
6455 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6456 needn't exist in the global table yet). */
6457 if (sig_entry
!= NULL
)
6460 if (dwp_file
->tus
== NULL
)
6462 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6463 sig
, 1 /* is_debug_types */);
6464 if (dwo_entry
== NULL
)
6467 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6468 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6473 /* Lookup a signature based type for DW_FORM_ref_sig8.
6474 Returns NULL if signature SIG is not present in the table.
6475 It is up to the caller to complain about this. */
6477 static struct signatured_type
*
6478 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6480 struct dwarf2_per_objfile
*dwarf2_per_objfile
6481 = cu
->per_cu
->dwarf2_per_objfile
;
6484 && dwarf2_per_objfile
->using_index
)
6486 /* We're in a DWO/DWP file, and we're using .gdb_index.
6487 These cases require special processing. */
6488 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
6489 return lookup_dwo_signatured_type (cu
, sig
);
6491 return lookup_dwp_signatured_type (cu
, sig
);
6495 struct signatured_type find_entry
, *entry
;
6497 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6499 find_entry
.signature
= sig
;
6500 entry
= ((struct signatured_type
*)
6501 htab_find (dwarf2_per_objfile
->signatured_types
.get (),
6507 /* Low level DIE reading support. */
6509 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6512 init_cu_die_reader (struct die_reader_specs
*reader
,
6513 struct dwarf2_cu
*cu
,
6514 struct dwarf2_section_info
*section
,
6515 struct dwo_file
*dwo_file
,
6516 struct abbrev_table
*abbrev_table
)
6518 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6519 reader
->abfd
= section
->get_bfd_owner ();
6521 reader
->dwo_file
= dwo_file
;
6522 reader
->die_section
= section
;
6523 reader
->buffer
= section
->buffer
;
6524 reader
->buffer_end
= section
->buffer
+ section
->size
;
6525 reader
->abbrev_table
= abbrev_table
;
6528 /* Subroutine of cutu_reader to simplify it.
6529 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6530 There's just a lot of work to do, and cutu_reader is big enough
6533 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6534 from it to the DIE in the DWO. If NULL we are skipping the stub.
6535 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6536 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6537 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6538 STUB_COMP_DIR may be non-NULL.
6539 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6540 are filled in with the info of the DIE from the DWO file.
6541 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6542 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6543 kept around for at least as long as *RESULT_READER.
6545 The result is non-zero if a valid (non-dummy) DIE was found. */
6548 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
6549 struct dwo_unit
*dwo_unit
,
6550 struct die_info
*stub_comp_unit_die
,
6551 const char *stub_comp_dir
,
6552 struct die_reader_specs
*result_reader
,
6553 const gdb_byte
**result_info_ptr
,
6554 struct die_info
**result_comp_unit_die
,
6555 abbrev_table_up
*result_dwo_abbrev_table
)
6557 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6558 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6559 struct dwarf2_cu
*cu
= this_cu
->cu
;
6561 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6562 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6563 int i
,num_extra_attrs
;
6564 struct dwarf2_section_info
*dwo_abbrev_section
;
6565 struct die_info
*comp_unit_die
;
6567 /* At most one of these may be provided. */
6568 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6570 /* These attributes aren't processed until later:
6571 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6572 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6573 referenced later. However, these attributes are found in the stub
6574 which we won't have later. In order to not impose this complication
6575 on the rest of the code, we read them here and copy them to the
6584 if (stub_comp_unit_die
!= NULL
)
6586 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6588 if (! this_cu
->is_debug_types
)
6589 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6590 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6591 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6592 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6593 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6595 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6597 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6598 here (if needed). We need the value before we can process
6600 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6602 else if (stub_comp_dir
!= NULL
)
6604 /* Reconstruct the comp_dir attribute to simplify the code below. */
6605 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6606 comp_dir
->name
= DW_AT_comp_dir
;
6607 comp_dir
->form
= DW_FORM_string
;
6608 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6609 DW_STRING (comp_dir
) = stub_comp_dir
;
6612 /* Set up for reading the DWO CU/TU. */
6613 cu
->dwo_unit
= dwo_unit
;
6614 dwarf2_section_info
*section
= dwo_unit
->section
;
6615 section
->read (objfile
);
6616 abfd
= section
->get_bfd_owner ();
6617 begin_info_ptr
= info_ptr
= (section
->buffer
6618 + to_underlying (dwo_unit
->sect_off
));
6619 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6621 if (this_cu
->is_debug_types
)
6623 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
6625 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6626 &cu
->header
, section
,
6628 info_ptr
, rcuh_kind::TYPE
);
6629 /* This is not an assert because it can be caused by bad debug info. */
6630 if (sig_type
->signature
!= cu
->header
.signature
)
6632 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6633 " TU at offset %s [in module %s]"),
6634 hex_string (sig_type
->signature
),
6635 hex_string (cu
->header
.signature
),
6636 sect_offset_str (dwo_unit
->sect_off
),
6637 bfd_get_filename (abfd
));
6639 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6640 /* For DWOs coming from DWP files, we don't know the CU length
6641 nor the type's offset in the TU until now. */
6642 dwo_unit
->length
= cu
->header
.get_length ();
6643 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6645 /* Establish the type offset that can be used to lookup the type.
6646 For DWO files, we don't know it until now. */
6647 sig_type
->type_offset_in_section
6648 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6652 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6653 &cu
->header
, section
,
6655 info_ptr
, rcuh_kind::COMPILE
);
6656 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6657 /* For DWOs coming from DWP files, we don't know the CU length
6659 dwo_unit
->length
= cu
->header
.get_length ();
6662 *result_dwo_abbrev_table
6663 = abbrev_table::read (objfile
, dwo_abbrev_section
,
6664 cu
->header
.abbrev_sect_off
);
6665 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
6666 result_dwo_abbrev_table
->get ());
6668 /* Read in the die, but leave space to copy over the attributes
6669 from the stub. This has the benefit of simplifying the rest of
6670 the code - all the work to maintain the illusion of a single
6671 DW_TAG_{compile,type}_unit DIE is done here. */
6672 num_extra_attrs
= ((stmt_list
!= NULL
)
6676 + (comp_dir
!= NULL
));
6677 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6680 /* Copy over the attributes from the stub to the DIE we just read in. */
6681 comp_unit_die
= *result_comp_unit_die
;
6682 i
= comp_unit_die
->num_attrs
;
6683 if (stmt_list
!= NULL
)
6684 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6686 comp_unit_die
->attrs
[i
++] = *low_pc
;
6687 if (high_pc
!= NULL
)
6688 comp_unit_die
->attrs
[i
++] = *high_pc
;
6690 comp_unit_die
->attrs
[i
++] = *ranges
;
6691 if (comp_dir
!= NULL
)
6692 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6693 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6695 if (dwarf_die_debug
)
6697 fprintf_unfiltered (gdb_stdlog
,
6698 "Read die from %s@0x%x of %s:\n",
6699 section
->get_name (),
6700 (unsigned) (begin_info_ptr
- section
->buffer
),
6701 bfd_get_filename (abfd
));
6702 dump_die (comp_unit_die
, dwarf_die_debug
);
6705 /* Skip dummy compilation units. */
6706 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6707 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6710 *result_info_ptr
= info_ptr
;
6714 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
6715 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
6716 signature is part of the header. */
6717 static gdb::optional
<ULONGEST
>
6718 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
6720 if (cu
->header
.version
>= 5)
6721 return cu
->header
.signature
;
6722 struct attribute
*attr
;
6723 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6724 if (attr
== nullptr)
6725 return gdb::optional
<ULONGEST
> ();
6726 return DW_UNSND (attr
);
6729 /* Subroutine of cutu_reader to simplify it.
6730 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6731 Returns NULL if the specified DWO unit cannot be found. */
6733 static struct dwo_unit
*
6734 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
6735 struct die_info
*comp_unit_die
,
6736 const char *dwo_name
)
6738 struct dwarf2_cu
*cu
= this_cu
->cu
;
6739 struct dwo_unit
*dwo_unit
;
6740 const char *comp_dir
;
6742 gdb_assert (cu
!= NULL
);
6744 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6745 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6746 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6748 if (this_cu
->is_debug_types
)
6750 struct signatured_type
*sig_type
;
6752 /* Since this_cu is the first member of struct signatured_type,
6753 we can go from a pointer to one to a pointer to the other. */
6754 sig_type
= (struct signatured_type
*) this_cu
;
6755 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
6759 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
6760 if (!signature
.has_value ())
6761 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6763 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
6764 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
6771 /* Subroutine of cutu_reader to simplify it.
6772 See it for a description of the parameters.
6773 Read a TU directly from a DWO file, bypassing the stub. */
6776 cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
6777 int use_existing_cu
)
6779 struct signatured_type
*sig_type
;
6781 /* Verify we can do the following downcast, and that we have the
6783 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6784 sig_type
= (struct signatured_type
*) this_cu
;
6785 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6787 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6789 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6790 /* There's no need to do the rereading_dwo_cu handling that
6791 cutu_reader does since we don't read the stub. */
6795 /* If !use_existing_cu, this_cu->cu must be NULL. */
6796 gdb_assert (this_cu
->cu
== NULL
);
6797 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6800 /* A future optimization, if needed, would be to use an existing
6801 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6802 could share abbrev tables. */
6804 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
6805 NULL
/* stub_comp_unit_die */,
6806 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6809 &m_dwo_abbrev_table
) == 0)
6816 /* Initialize a CU (or TU) and read its DIEs.
6817 If the CU defers to a DWO file, read the DWO file as well.
6819 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6820 Otherwise the table specified in the comp unit header is read in and used.
6821 This is an optimization for when we already have the abbrev table.
6823 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6824 Otherwise, a new CU is allocated with xmalloc. */
6826 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
6827 struct abbrev_table
*abbrev_table
,
6828 int use_existing_cu
,
6830 : die_reader_specs
{},
6833 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6834 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6835 struct dwarf2_section_info
*section
= this_cu
->section
;
6836 bfd
*abfd
= section
->get_bfd_owner ();
6837 struct dwarf2_cu
*cu
;
6838 const gdb_byte
*begin_info_ptr
;
6839 struct signatured_type
*sig_type
= NULL
;
6840 struct dwarf2_section_info
*abbrev_section
;
6841 /* Non-zero if CU currently points to a DWO file and we need to
6842 reread it. When this happens we need to reread the skeleton die
6843 before we can reread the DWO file (this only applies to CUs, not TUs). */
6844 int rereading_dwo_cu
= 0;
6846 if (dwarf_die_debug
)
6847 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
6848 this_cu
->is_debug_types
? "type" : "comp",
6849 sect_offset_str (this_cu
->sect_off
));
6851 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6852 file (instead of going through the stub), short-circuit all of this. */
6853 if (this_cu
->reading_dwo_directly
)
6855 /* Narrow down the scope of possibilities to have to understand. */
6856 gdb_assert (this_cu
->is_debug_types
);
6857 gdb_assert (abbrev_table
== NULL
);
6858 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
);
6862 /* This is cheap if the section is already read in. */
6863 section
->read (objfile
);
6865 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6867 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
6869 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6872 /* If this CU is from a DWO file we need to start over, we need to
6873 refetch the attributes from the skeleton CU.
6874 This could be optimized by retrieving those attributes from when we
6875 were here the first time: the previous comp_unit_die was stored in
6876 comp_unit_obstack. But there's no data yet that we need this
6878 if (cu
->dwo_unit
!= NULL
)
6879 rereading_dwo_cu
= 1;
6883 /* If !use_existing_cu, this_cu->cu must be NULL. */
6884 gdb_assert (this_cu
->cu
== NULL
);
6885 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6886 cu
= m_new_cu
.get ();
6889 /* Get the header. */
6890 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
6892 /* We already have the header, there's no need to read it in again. */
6893 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
6897 if (this_cu
->is_debug_types
)
6899 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6900 &cu
->header
, section
,
6901 abbrev_section
, info_ptr
,
6904 /* Since per_cu is the first member of struct signatured_type,
6905 we can go from a pointer to one to a pointer to the other. */
6906 sig_type
= (struct signatured_type
*) this_cu
;
6907 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
6908 gdb_assert (sig_type
->type_offset_in_tu
6909 == cu
->header
.type_cu_offset_in_tu
);
6910 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6912 /* LENGTH has not been set yet for type units if we're
6913 using .gdb_index. */
6914 this_cu
->length
= cu
->header
.get_length ();
6916 /* Establish the type offset that can be used to lookup the type. */
6917 sig_type
->type_offset_in_section
=
6918 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
6920 this_cu
->dwarf_version
= cu
->header
.version
;
6924 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6925 &cu
->header
, section
,
6928 rcuh_kind::COMPILE
);
6930 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6931 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
6932 this_cu
->dwarf_version
= cu
->header
.version
;
6936 /* Skip dummy compilation units. */
6937 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
6938 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6944 /* If we don't have them yet, read the abbrevs for this compilation unit.
6945 And if we need to read them now, make sure they're freed when we're
6947 if (abbrev_table
!= NULL
)
6948 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
6951 m_abbrev_table_holder
6952 = abbrev_table::read (objfile
, abbrev_section
,
6953 cu
->header
.abbrev_sect_off
);
6954 abbrev_table
= m_abbrev_table_holder
.get ();
6957 /* Read the top level CU/TU die. */
6958 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
6959 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
6961 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
6967 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
6968 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
6969 table from the DWO file and pass the ownership over to us. It will be
6970 referenced from READER, so we must make sure to free it after we're done
6973 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
6974 DWO CU, that this test will fail (the attribute will not be present). */
6975 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6976 if (dwo_name
!= nullptr)
6978 struct dwo_unit
*dwo_unit
;
6979 struct die_info
*dwo_comp_unit_die
;
6981 if (comp_unit_die
->has_children
)
6983 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
6984 " has children (offset %s) [in module %s]"),
6985 sect_offset_str (this_cu
->sect_off
),
6986 bfd_get_filename (abfd
));
6988 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
, dwo_name
);
6989 if (dwo_unit
!= NULL
)
6991 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
6992 comp_unit_die
, NULL
,
6995 &m_dwo_abbrev_table
) == 0)
7001 comp_unit_die
= dwo_comp_unit_die
;
7005 /* Yikes, we couldn't find the rest of the DIE, we only have
7006 the stub. A complaint has already been logged. There's
7007 not much more we can do except pass on the stub DIE to
7008 die_reader_func. We don't want to throw an error on bad
7015 cutu_reader::keep ()
7017 /* Done, clean up. */
7018 gdb_assert (!dummy_p
);
7019 if (m_new_cu
!= NULL
)
7021 struct dwarf2_per_objfile
*dwarf2_per_objfile
7022 = m_this_cu
->dwarf2_per_objfile
;
7023 /* Link this CU into read_in_chain. */
7024 m_this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7025 dwarf2_per_objfile
->read_in_chain
= m_this_cu
;
7026 /* The chain owns it now. */
7027 m_new_cu
.release ();
7031 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7032 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7033 assumed to have already done the lookup to find the DWO file).
7035 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7036 THIS_CU->is_debug_types, but nothing else.
7038 We fill in THIS_CU->length.
7040 THIS_CU->cu is always freed when done.
7041 This is done in order to not leave THIS_CU->cu in a state where we have
7042 to care whether it refers to the "main" CU or the DWO CU.
7044 When parent_cu is passed, it is used to provide a default value for
7045 str_offsets_base and addr_base from the parent. */
7047 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
7048 struct dwarf2_cu
*parent_cu
,
7049 struct dwo_file
*dwo_file
)
7050 : die_reader_specs
{},
7053 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7054 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7055 struct dwarf2_section_info
*section
= this_cu
->section
;
7056 bfd
*abfd
= section
->get_bfd_owner ();
7057 struct dwarf2_section_info
*abbrev_section
;
7058 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7060 if (dwarf_die_debug
)
7061 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7062 this_cu
->is_debug_types
? "type" : "comp",
7063 sect_offset_str (this_cu
->sect_off
));
7065 gdb_assert (this_cu
->cu
== NULL
);
7067 abbrev_section
= (dwo_file
!= NULL
7068 ? &dwo_file
->sections
.abbrev
7069 : get_abbrev_section_for_cu (this_cu
));
7071 /* This is cheap if the section is already read in. */
7072 section
->read (objfile
);
7074 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7076 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7077 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7078 &m_new_cu
->header
, section
,
7079 abbrev_section
, info_ptr
,
7080 (this_cu
->is_debug_types
7082 : rcuh_kind::COMPILE
));
7084 if (parent_cu
!= nullptr)
7086 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7087 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7089 this_cu
->length
= m_new_cu
->header
.get_length ();
7091 /* Skip dummy compilation units. */
7092 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7093 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7099 m_abbrev_table_holder
7100 = abbrev_table::read (objfile
, abbrev_section
,
7101 m_new_cu
->header
.abbrev_sect_off
);
7103 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7104 m_abbrev_table_holder
.get ());
7105 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7109 /* Type Unit Groups.
7111 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7112 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7113 so that all types coming from the same compilation (.o file) are grouped
7114 together. A future step could be to put the types in the same symtab as
7115 the CU the types ultimately came from. */
7118 hash_type_unit_group (const void *item
)
7120 const struct type_unit_group
*tu_group
7121 = (const struct type_unit_group
*) item
;
7123 return hash_stmt_list_entry (&tu_group
->hash
);
7127 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7129 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7130 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7132 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7135 /* Allocate a hash table for type unit groups. */
7138 allocate_type_unit_groups_table ()
7140 return htab_up (htab_create_alloc (3,
7141 hash_type_unit_group
,
7143 NULL
, xcalloc
, xfree
));
7146 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7147 partial symtabs. We combine several TUs per psymtab to not let the size
7148 of any one psymtab grow too big. */
7149 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7150 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7152 /* Helper routine for get_type_unit_group.
7153 Create the type_unit_group object used to hold one or more TUs. */
7155 static struct type_unit_group
*
7156 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7158 struct dwarf2_per_objfile
*dwarf2_per_objfile
7159 = cu
->per_cu
->dwarf2_per_objfile
;
7160 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7161 struct dwarf2_per_cu_data
*per_cu
;
7162 struct type_unit_group
*tu_group
;
7164 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7165 struct type_unit_group
);
7166 per_cu
= &tu_group
->per_cu
;
7167 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7169 if (dwarf2_per_objfile
->using_index
)
7171 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7172 struct dwarf2_per_cu_quick_data
);
7176 unsigned int line_offset
= to_underlying (line_offset_struct
);
7177 dwarf2_psymtab
*pst
;
7180 /* Give the symtab a useful name for debug purposes. */
7181 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7182 name
= string_printf ("<type_units_%d>",
7183 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7185 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7187 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7188 pst
->anonymous
= true;
7191 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7192 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7197 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7198 STMT_LIST is a DW_AT_stmt_list attribute. */
7200 static struct type_unit_group
*
7201 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7203 struct dwarf2_per_objfile
*dwarf2_per_objfile
7204 = cu
->per_cu
->dwarf2_per_objfile
;
7205 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7206 struct type_unit_group
*tu_group
;
7208 unsigned int line_offset
;
7209 struct type_unit_group type_unit_group_for_lookup
;
7211 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7212 dwarf2_per_objfile
->type_unit_groups
= allocate_type_unit_groups_table ();
7214 /* Do we need to create a new group, or can we use an existing one? */
7218 line_offset
= DW_UNSND (stmt_list
);
7219 ++tu_stats
->nr_symtab_sharers
;
7223 /* Ugh, no stmt_list. Rare, but we have to handle it.
7224 We can do various things here like create one group per TU or
7225 spread them over multiple groups to split up the expansion work.
7226 To avoid worst case scenarios (too many groups or too large groups)
7227 we, umm, group them in bunches. */
7228 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7229 | (tu_stats
->nr_stmt_less_type_units
7230 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7231 ++tu_stats
->nr_stmt_less_type_units
;
7234 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7235 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7236 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
.get (),
7237 &type_unit_group_for_lookup
, INSERT
);
7240 tu_group
= (struct type_unit_group
*) *slot
;
7241 gdb_assert (tu_group
!= NULL
);
7245 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7246 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7248 ++tu_stats
->nr_symtabs
;
7254 /* Partial symbol tables. */
7256 /* Create a psymtab named NAME and assign it to PER_CU.
7258 The caller must fill in the following details:
7259 dirname, textlow, texthigh. */
7261 static dwarf2_psymtab
*
7262 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7264 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7265 dwarf2_psymtab
*pst
;
7267 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7269 pst
->psymtabs_addrmap_supported
= true;
7271 /* This is the glue that links PST into GDB's symbol API. */
7272 per_cu
->v
.psymtab
= pst
;
7277 /* DIE reader function for process_psymtab_comp_unit. */
7280 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7281 const gdb_byte
*info_ptr
,
7282 struct die_info
*comp_unit_die
,
7283 enum language pretend_language
)
7285 struct dwarf2_cu
*cu
= reader
->cu
;
7286 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7287 struct gdbarch
*gdbarch
= objfile
->arch ();
7288 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7290 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7291 dwarf2_psymtab
*pst
;
7292 enum pc_bounds_kind cu_bounds_kind
;
7293 const char *filename
;
7295 gdb_assert (! per_cu
->is_debug_types
);
7297 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7299 /* Allocate a new partial symbol table structure. */
7300 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7301 static const char artificial
[] = "<artificial>";
7302 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7303 if (filename
== NULL
)
7305 else if (strcmp (filename
, artificial
) == 0)
7307 debug_filename
.reset (concat (artificial
, "@",
7308 sect_offset_str (per_cu
->sect_off
),
7310 filename
= debug_filename
.get ();
7313 pst
= create_partial_symtab (per_cu
, filename
);
7315 /* This must be done before calling dwarf2_build_include_psymtabs. */
7316 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7318 baseaddr
= objfile
->text_section_offset ();
7320 dwarf2_find_base_address (comp_unit_die
, cu
);
7322 /* Possibly set the default values of LOWPC and HIGHPC from
7324 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7325 &best_highpc
, cu
, pst
);
7326 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7329 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7332 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7334 /* Store the contiguous range if it is not empty; it can be
7335 empty for CUs with no code. */
7336 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7340 /* Check if comp unit has_children.
7341 If so, read the rest of the partial symbols from this comp unit.
7342 If not, there's no more debug_info for this comp unit. */
7343 if (comp_unit_die
->has_children
)
7345 struct partial_die_info
*first_die
;
7346 CORE_ADDR lowpc
, highpc
;
7348 lowpc
= ((CORE_ADDR
) -1);
7349 highpc
= ((CORE_ADDR
) 0);
7351 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7353 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7354 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7356 /* If we didn't find a lowpc, set it to highpc to avoid
7357 complaints from `maint check'. */
7358 if (lowpc
== ((CORE_ADDR
) -1))
7361 /* If the compilation unit didn't have an explicit address range,
7362 then use the information extracted from its child dies. */
7363 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7366 best_highpc
= highpc
;
7369 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7370 best_lowpc
+ baseaddr
)
7372 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7373 best_highpc
+ baseaddr
)
7376 end_psymtab_common (objfile
, pst
);
7378 if (!cu
->per_cu
->imported_symtabs_empty ())
7381 int len
= cu
->per_cu
->imported_symtabs_size ();
7383 /* Fill in 'dependencies' here; we fill in 'users' in a
7385 pst
->number_of_dependencies
= len
;
7387 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7388 for (i
= 0; i
< len
; ++i
)
7390 pst
->dependencies
[i
]
7391 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7394 cu
->per_cu
->imported_symtabs_free ();
7397 /* Get the list of files included in the current compilation unit,
7398 and build a psymtab for each of them. */
7399 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7401 if (dwarf_read_debug
)
7402 fprintf_unfiltered (gdb_stdlog
,
7403 "Psymtab for %s unit @%s: %s - %s"
7404 ", %d global, %d static syms\n",
7405 per_cu
->is_debug_types
? "type" : "comp",
7406 sect_offset_str (per_cu
->sect_off
),
7407 paddress (gdbarch
, pst
->text_low (objfile
)),
7408 paddress (gdbarch
, pst
->text_high (objfile
)),
7409 pst
->n_global_syms
, pst
->n_static_syms
);
7412 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7413 Process compilation unit THIS_CU for a psymtab. */
7416 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7417 bool want_partial_unit
,
7418 enum language pretend_language
)
7420 /* If this compilation unit was already read in, free the
7421 cached copy in order to read it in again. This is
7422 necessary because we skipped some symbols when we first
7423 read in the compilation unit (see load_partial_dies).
7424 This problem could be avoided, but the benefit is unclear. */
7425 if (this_cu
->cu
!= NULL
)
7426 free_one_cached_comp_unit (this_cu
);
7428 cutu_reader
reader (this_cu
, NULL
, 0, false);
7430 switch (reader
.comp_unit_die
->tag
)
7432 case DW_TAG_compile_unit
:
7433 this_cu
->unit_type
= DW_UT_compile
;
7435 case DW_TAG_partial_unit
:
7436 this_cu
->unit_type
= DW_UT_partial
;
7446 else if (this_cu
->is_debug_types
)
7447 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7448 reader
.comp_unit_die
);
7449 else if (want_partial_unit
7450 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7451 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7452 reader
.comp_unit_die
,
7455 this_cu
->lang
= this_cu
->cu
->language
;
7457 /* Age out any secondary CUs. */
7458 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
7461 /* Reader function for build_type_psymtabs. */
7464 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7465 const gdb_byte
*info_ptr
,
7466 struct die_info
*type_unit_die
)
7468 struct dwarf2_per_objfile
*dwarf2_per_objfile
7469 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
7470 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7471 struct dwarf2_cu
*cu
= reader
->cu
;
7472 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7473 struct signatured_type
*sig_type
;
7474 struct type_unit_group
*tu_group
;
7475 struct attribute
*attr
;
7476 struct partial_die_info
*first_die
;
7477 CORE_ADDR lowpc
, highpc
;
7478 dwarf2_psymtab
*pst
;
7480 gdb_assert (per_cu
->is_debug_types
);
7481 sig_type
= (struct signatured_type
*) per_cu
;
7483 if (! type_unit_die
->has_children
)
7486 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7487 tu_group
= get_type_unit_group (cu
, attr
);
7489 if (tu_group
->tus
== nullptr)
7490 tu_group
->tus
= new std::vector
<signatured_type
*>;
7491 tu_group
->tus
->push_back (sig_type
);
7493 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7494 pst
= create_partial_symtab (per_cu
, "");
7495 pst
->anonymous
= true;
7497 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7499 lowpc
= (CORE_ADDR
) -1;
7500 highpc
= (CORE_ADDR
) 0;
7501 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7503 end_psymtab_common (objfile
, pst
);
7506 /* Struct used to sort TUs by their abbreviation table offset. */
7508 struct tu_abbrev_offset
7510 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7511 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7514 signatured_type
*sig_type
;
7515 sect_offset abbrev_offset
;
7518 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7521 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7522 const struct tu_abbrev_offset
&b
)
7524 return a
.abbrev_offset
< b
.abbrev_offset
;
7527 /* Efficiently read all the type units.
7528 This does the bulk of the work for build_type_psymtabs.
7530 The efficiency is because we sort TUs by the abbrev table they use and
7531 only read each abbrev table once. In one program there are 200K TUs
7532 sharing 8K abbrev tables.
7534 The main purpose of this function is to support building the
7535 dwarf2_per_objfile->type_unit_groups table.
7536 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7537 can collapse the search space by grouping them by stmt_list.
7538 The savings can be significant, in the same program from above the 200K TUs
7539 share 8K stmt_list tables.
7541 FUNC is expected to call get_type_unit_group, which will create the
7542 struct type_unit_group if necessary and add it to
7543 dwarf2_per_objfile->type_unit_groups. */
7546 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7548 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7549 abbrev_table_up abbrev_table
;
7550 sect_offset abbrev_offset
;
7552 /* It's up to the caller to not call us multiple times. */
7553 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
7555 if (dwarf2_per_objfile
->all_type_units
.empty ())
7558 /* TUs typically share abbrev tables, and there can be way more TUs than
7559 abbrev tables. Sort by abbrev table to reduce the number of times we
7560 read each abbrev table in.
7561 Alternatives are to punt or to maintain a cache of abbrev tables.
7562 This is simpler and efficient enough for now.
7564 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7565 symtab to use). Typically TUs with the same abbrev offset have the same
7566 stmt_list value too so in practice this should work well.
7568 The basic algorithm here is:
7570 sort TUs by abbrev table
7571 for each TU with same abbrev table:
7572 read abbrev table if first user
7573 read TU top level DIE
7574 [IWBN if DWO skeletons had DW_AT_stmt_list]
7577 if (dwarf_read_debug
)
7578 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7580 /* Sort in a separate table to maintain the order of all_type_units
7581 for .gdb_index: TU indices directly index all_type_units. */
7582 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7583 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
7585 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
7586 sorted_by_abbrev
.emplace_back
7587 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
7588 sig_type
->per_cu
.section
,
7589 sig_type
->per_cu
.sect_off
));
7591 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7592 sort_tu_by_abbrev_offset
);
7594 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7596 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7598 /* Switch to the next abbrev table if necessary. */
7599 if (abbrev_table
== NULL
7600 || tu
.abbrev_offset
!= abbrev_offset
)
7602 abbrev_offset
= tu
.abbrev_offset
;
7604 abbrev_table::read (dwarf2_per_objfile
->objfile
,
7605 &dwarf2_per_objfile
->abbrev
,
7607 ++tu_stats
->nr_uniq_abbrev_tables
;
7610 cutu_reader
reader (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
7612 if (!reader
.dummy_p
)
7613 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7614 reader
.comp_unit_die
);
7618 /* Print collected type unit statistics. */
7621 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7623 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7625 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7626 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
7627 dwarf2_per_objfile
->all_type_units
.size ());
7628 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7629 tu_stats
->nr_uniq_abbrev_tables
);
7630 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7631 tu_stats
->nr_symtabs
);
7632 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7633 tu_stats
->nr_symtab_sharers
);
7634 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7635 tu_stats
->nr_stmt_less_type_units
);
7636 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7637 tu_stats
->nr_all_type_units_reallocs
);
7640 /* Traversal function for build_type_psymtabs. */
7643 build_type_psymtab_dependencies (void **slot
, void *info
)
7645 struct dwarf2_per_objfile
*dwarf2_per_objfile
7646 = (struct dwarf2_per_objfile
*) info
;
7647 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7648 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7649 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7650 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7651 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
7654 gdb_assert (len
> 0);
7655 gdb_assert (per_cu
->type_unit_group_p ());
7657 pst
->number_of_dependencies
= len
;
7658 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
7659 for (i
= 0; i
< len
; ++i
)
7661 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
7662 gdb_assert (iter
->per_cu
.is_debug_types
);
7663 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7664 iter
->type_unit_group
= tu_group
;
7667 delete tu_group
->tus
;
7668 tu_group
->tus
= nullptr;
7673 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7674 Build partial symbol tables for the .debug_types comp-units. */
7677 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7679 if (! create_all_type_units (dwarf2_per_objfile
))
7682 build_type_psymtabs_1 (dwarf2_per_objfile
);
7685 /* Traversal function for process_skeletonless_type_unit.
7686 Read a TU in a DWO file and build partial symbols for it. */
7689 process_skeletonless_type_unit (void **slot
, void *info
)
7691 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7692 struct dwarf2_per_objfile
*dwarf2_per_objfile
7693 = (struct dwarf2_per_objfile
*) info
;
7694 struct signatured_type find_entry
, *entry
;
7696 /* If this TU doesn't exist in the global table, add it and read it in. */
7698 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7699 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
7701 find_entry
.signature
= dwo_unit
->signature
;
7702 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
7703 &find_entry
, INSERT
);
7704 /* If we've already seen this type there's nothing to do. What's happening
7705 is we're doing our own version of comdat-folding here. */
7709 /* This does the job that create_all_type_units would have done for
7711 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
7712 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
7715 /* This does the job that build_type_psymtabs_1 would have done. */
7716 cutu_reader
reader (&entry
->per_cu
, NULL
, 0, false);
7717 if (!reader
.dummy_p
)
7718 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7719 reader
.comp_unit_die
);
7724 /* Traversal function for process_skeletonless_type_units. */
7727 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7729 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7731 if (dwo_file
->tus
!= NULL
)
7732 htab_traverse_noresize (dwo_file
->tus
.get (),
7733 process_skeletonless_type_unit
, info
);
7738 /* Scan all TUs of DWO files, verifying we've processed them.
7739 This is needed in case a TU was emitted without its skeleton.
7740 Note: This can't be done until we know what all the DWO files are. */
7743 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7745 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7746 if (get_dwp_file (dwarf2_per_objfile
) == NULL
7747 && dwarf2_per_objfile
->dwo_files
!= NULL
)
7749 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
7750 process_dwo_file_for_skeletonless_type_units
,
7751 dwarf2_per_objfile
);
7755 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
7758 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7760 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7762 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7767 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7769 /* Set the 'user' field only if it is not already set. */
7770 if (pst
->dependencies
[j
]->user
== NULL
)
7771 pst
->dependencies
[j
]->user
= pst
;
7776 /* Build the partial symbol table by doing a quick pass through the
7777 .debug_info and .debug_abbrev sections. */
7780 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7782 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7784 if (dwarf_read_debug
)
7786 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7787 objfile_name (objfile
));
7790 scoped_restore restore_reading_psyms
7791 = make_scoped_restore (&dwarf2_per_objfile
->reading_partial_symbols
,
7794 dwarf2_per_objfile
->info
.read (objfile
);
7796 /* Any cached compilation units will be linked by the per-objfile
7797 read_in_chain. Make sure to free them when we're done. */
7798 free_cached_comp_units
freer (dwarf2_per_objfile
);
7800 build_type_psymtabs (dwarf2_per_objfile
);
7802 create_all_comp_units (dwarf2_per_objfile
);
7804 /* Create a temporary address map on a temporary obstack. We later
7805 copy this to the final obstack. */
7806 auto_obstack temp_obstack
;
7808 scoped_restore save_psymtabs_addrmap
7809 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
7810 addrmap_create_mutable (&temp_obstack
));
7812 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7814 if (per_cu
->v
.psymtab
!= NULL
)
7815 /* In case a forward DW_TAG_imported_unit has read the CU already. */
7817 process_psymtab_comp_unit (per_cu
, false, language_minimal
);
7820 /* This has to wait until we read the CUs, we need the list of DWOs. */
7821 process_skeletonless_type_units (dwarf2_per_objfile
);
7823 /* Now that all TUs have been processed we can fill in the dependencies. */
7824 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
7826 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
.get (),
7827 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
7830 if (dwarf_read_debug
)
7831 print_tu_stats (dwarf2_per_objfile
);
7833 set_partial_user (dwarf2_per_objfile
);
7835 objfile
->partial_symtabs
->psymtabs_addrmap
7836 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
7837 objfile
->partial_symtabs
->obstack ());
7838 /* At this point we want to keep the address map. */
7839 save_psymtabs_addrmap
.release ();
7841 if (dwarf_read_debug
)
7842 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7843 objfile_name (objfile
));
7846 /* Load the partial DIEs for a secondary CU into memory.
7847 This is also used when rereading a primary CU with load_all_dies. */
7850 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
7852 cutu_reader
reader (this_cu
, NULL
, 1, false);
7854 if (!reader
.dummy_p
)
7856 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
7859 /* Check if comp unit has_children.
7860 If so, read the rest of the partial symbols from this comp unit.
7861 If not, there's no more debug_info for this comp unit. */
7862 if (reader
.comp_unit_die
->has_children
)
7863 load_partial_dies (&reader
, reader
.info_ptr
, 0);
7870 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
7871 struct dwarf2_section_info
*section
,
7872 struct dwarf2_section_info
*abbrev_section
,
7873 unsigned int is_dwz
)
7875 const gdb_byte
*info_ptr
;
7876 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7878 if (dwarf_read_debug
)
7879 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
7880 section
->get_name (),
7881 section
->get_file_name ());
7883 section
->read (objfile
);
7885 info_ptr
= section
->buffer
;
7887 while (info_ptr
< section
->buffer
+ section
->size
)
7889 struct dwarf2_per_cu_data
*this_cu
;
7891 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
7893 comp_unit_head cu_header
;
7894 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
7895 abbrev_section
, info_ptr
,
7896 rcuh_kind::COMPILE
);
7898 /* Save the compilation unit for later lookup. */
7899 if (cu_header
.unit_type
!= DW_UT_type
)
7901 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
7902 struct dwarf2_per_cu_data
);
7903 memset (this_cu
, 0, sizeof (*this_cu
));
7907 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
7908 struct signatured_type
);
7909 memset (sig_type
, 0, sizeof (*sig_type
));
7910 sig_type
->signature
= cu_header
.signature
;
7911 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
7912 this_cu
= &sig_type
->per_cu
;
7914 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
7915 this_cu
->sect_off
= sect_off
;
7916 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
7917 this_cu
->is_dwz
= is_dwz
;
7918 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7919 this_cu
->section
= section
;
7921 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
7923 info_ptr
= info_ptr
+ this_cu
->length
;
7927 /* Create a list of all compilation units in OBJFILE.
7928 This is only done for -readnow and building partial symtabs. */
7931 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7933 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
7934 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
7935 &dwarf2_per_objfile
->abbrev
, 0);
7937 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
7939 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
7943 /* Process all loaded DIEs for compilation unit CU, starting at
7944 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
7945 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
7946 DW_AT_ranges). See the comments of add_partial_subprogram on how
7947 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
7950 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
7951 CORE_ADDR
*highpc
, int set_addrmap
,
7952 struct dwarf2_cu
*cu
)
7954 struct partial_die_info
*pdi
;
7956 /* Now, march along the PDI's, descending into ones which have
7957 interesting children but skipping the children of the other ones,
7958 until we reach the end of the compilation unit. */
7966 /* Anonymous namespaces or modules have no name but have interesting
7967 children, so we need to look at them. Ditto for anonymous
7970 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
7971 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
7972 || pdi
->tag
== DW_TAG_imported_unit
7973 || pdi
->tag
== DW_TAG_inlined_subroutine
)
7977 case DW_TAG_subprogram
:
7978 case DW_TAG_inlined_subroutine
:
7979 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7981 case DW_TAG_constant
:
7982 case DW_TAG_variable
:
7983 case DW_TAG_typedef
:
7984 case DW_TAG_union_type
:
7985 if (!pdi
->is_declaration
7986 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
7988 add_partial_symbol (pdi
, cu
);
7991 case DW_TAG_class_type
:
7992 case DW_TAG_interface_type
:
7993 case DW_TAG_structure_type
:
7994 if (!pdi
->is_declaration
)
7996 add_partial_symbol (pdi
, cu
);
7998 if ((cu
->language
== language_rust
7999 || cu
->language
== language_cplus
) && pdi
->has_children
)
8000 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8003 case DW_TAG_enumeration_type
:
8004 if (!pdi
->is_declaration
)
8005 add_partial_enumeration (pdi
, cu
);
8007 case DW_TAG_base_type
:
8008 case DW_TAG_subrange_type
:
8009 /* File scope base type definitions are added to the partial
8011 add_partial_symbol (pdi
, cu
);
8013 case DW_TAG_namespace
:
8014 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8017 if (!pdi
->is_declaration
)
8018 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8020 case DW_TAG_imported_unit
:
8022 struct dwarf2_per_cu_data
*per_cu
;
8024 /* For now we don't handle imported units in type units. */
8025 if (cu
->per_cu
->is_debug_types
)
8027 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8028 " supported in type units [in module %s]"),
8029 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8032 per_cu
= dwarf2_find_containing_comp_unit
8033 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8034 cu
->per_cu
->dwarf2_per_objfile
);
8036 /* Go read the partial unit, if needed. */
8037 if (per_cu
->v
.psymtab
== NULL
)
8038 process_psymtab_comp_unit (per_cu
, true, cu
->language
);
8040 cu
->per_cu
->imported_symtabs_push (per_cu
);
8043 case DW_TAG_imported_declaration
:
8044 add_partial_symbol (pdi
, cu
);
8051 /* If the die has a sibling, skip to the sibling. */
8053 pdi
= pdi
->die_sibling
;
8057 /* Functions used to compute the fully scoped name of a partial DIE.
8059 Normally, this is simple. For C++, the parent DIE's fully scoped
8060 name is concatenated with "::" and the partial DIE's name.
8061 Enumerators are an exception; they use the scope of their parent
8062 enumeration type, i.e. the name of the enumeration type is not
8063 prepended to the enumerator.
8065 There are two complexities. One is DW_AT_specification; in this
8066 case "parent" means the parent of the target of the specification,
8067 instead of the direct parent of the DIE. The other is compilers
8068 which do not emit DW_TAG_namespace; in this case we try to guess
8069 the fully qualified name of structure types from their members'
8070 linkage names. This must be done using the DIE's children rather
8071 than the children of any DW_AT_specification target. We only need
8072 to do this for structures at the top level, i.e. if the target of
8073 any DW_AT_specification (if any; otherwise the DIE itself) does not
8076 /* Compute the scope prefix associated with PDI's parent, in
8077 compilation unit CU. The result will be allocated on CU's
8078 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8079 field. NULL is returned if no prefix is necessary. */
8081 partial_die_parent_scope (struct partial_die_info
*pdi
,
8082 struct dwarf2_cu
*cu
)
8084 const char *grandparent_scope
;
8085 struct partial_die_info
*parent
, *real_pdi
;
8087 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8088 then this means the parent of the specification DIE. */
8091 while (real_pdi
->has_specification
)
8093 auto res
= find_partial_die (real_pdi
->spec_offset
,
8094 real_pdi
->spec_is_dwz
, cu
);
8099 parent
= real_pdi
->die_parent
;
8103 if (parent
->scope_set
)
8104 return parent
->scope
;
8108 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8110 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8111 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8112 Work around this problem here. */
8113 if (cu
->language
== language_cplus
8114 && parent
->tag
== DW_TAG_namespace
8115 && strcmp (parent
->name
, "::") == 0
8116 && grandparent_scope
== NULL
)
8118 parent
->scope
= NULL
;
8119 parent
->scope_set
= 1;
8123 /* Nested subroutines in Fortran get a prefix. */
8124 if (pdi
->tag
== DW_TAG_enumerator
)
8125 /* Enumerators should not get the name of the enumeration as a prefix. */
8126 parent
->scope
= grandparent_scope
;
8127 else if (parent
->tag
== DW_TAG_namespace
8128 || parent
->tag
== DW_TAG_module
8129 || parent
->tag
== DW_TAG_structure_type
8130 || parent
->tag
== DW_TAG_class_type
8131 || parent
->tag
== DW_TAG_interface_type
8132 || parent
->tag
== DW_TAG_union_type
8133 || parent
->tag
== DW_TAG_enumeration_type
8134 || (cu
->language
== language_fortran
8135 && parent
->tag
== DW_TAG_subprogram
8136 && pdi
->tag
== DW_TAG_subprogram
))
8138 if (grandparent_scope
== NULL
)
8139 parent
->scope
= parent
->name
;
8141 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8143 parent
->name
, 0, cu
);
8147 /* FIXME drow/2004-04-01: What should we be doing with
8148 function-local names? For partial symbols, we should probably be
8150 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8151 dwarf_tag_name (parent
->tag
),
8152 sect_offset_str (pdi
->sect_off
));
8153 parent
->scope
= grandparent_scope
;
8156 parent
->scope_set
= 1;
8157 return parent
->scope
;
8160 /* Return the fully scoped name associated with PDI, from compilation unit
8161 CU. The result will be allocated with malloc. */
8163 static gdb::unique_xmalloc_ptr
<char>
8164 partial_die_full_name (struct partial_die_info
*pdi
,
8165 struct dwarf2_cu
*cu
)
8167 const char *parent_scope
;
8169 /* If this is a template instantiation, we can not work out the
8170 template arguments from partial DIEs. So, unfortunately, we have
8171 to go through the full DIEs. At least any work we do building
8172 types here will be reused if full symbols are loaded later. */
8173 if (pdi
->has_template_arguments
)
8177 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8179 struct die_info
*die
;
8180 struct attribute attr
;
8181 struct dwarf2_cu
*ref_cu
= cu
;
8183 /* DW_FORM_ref_addr is using section offset. */
8184 attr
.name
= (enum dwarf_attribute
) 0;
8185 attr
.form
= DW_FORM_ref_addr
;
8186 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8187 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8189 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8193 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8194 if (parent_scope
== NULL
)
8197 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8202 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8204 struct dwarf2_per_objfile
*dwarf2_per_objfile
8205 = cu
->per_cu
->dwarf2_per_objfile
;
8206 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8207 struct gdbarch
*gdbarch
= objfile
->arch ();
8209 const char *actual_name
= NULL
;
8212 baseaddr
= objfile
->text_section_offset ();
8214 gdb::unique_xmalloc_ptr
<char> built_actual_name
8215 = partial_die_full_name (pdi
, cu
);
8216 if (built_actual_name
!= NULL
)
8217 actual_name
= built_actual_name
.get ();
8219 if (actual_name
== NULL
)
8220 actual_name
= pdi
->name
;
8222 partial_symbol psymbol
;
8223 memset (&psymbol
, 0, sizeof (psymbol
));
8224 psymbol
.ginfo
.set_language (cu
->language
, &objfile
->objfile_obstack
);
8225 psymbol
.ginfo
.section
= -1;
8227 /* The code below indicates that the psymbol should be installed by
8229 gdb::optional
<psymbol_placement
> where
;
8233 case DW_TAG_inlined_subroutine
:
8234 case DW_TAG_subprogram
:
8235 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8237 if (pdi
->is_external
8238 || cu
->language
== language_ada
8239 || (cu
->language
== language_fortran
8240 && pdi
->die_parent
!= NULL
8241 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8243 /* Normally, only "external" DIEs are part of the global scope.
8244 But in Ada and Fortran, we want to be able to access nested
8245 procedures globally. So all Ada and Fortran subprograms are
8246 stored in the global scope. */
8247 where
= psymbol_placement::GLOBAL
;
8250 where
= psymbol_placement::STATIC
;
8252 psymbol
.domain
= VAR_DOMAIN
;
8253 psymbol
.aclass
= LOC_BLOCK
;
8254 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8255 psymbol
.ginfo
.value
.address
= addr
;
8257 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8258 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8260 case DW_TAG_constant
:
8261 psymbol
.domain
= VAR_DOMAIN
;
8262 psymbol
.aclass
= LOC_STATIC
;
8263 where
= (pdi
->is_external
8264 ? psymbol_placement::GLOBAL
8265 : psymbol_placement::STATIC
);
8267 case DW_TAG_variable
:
8269 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8273 && !dwarf2_per_objfile
->has_section_at_zero
)
8275 /* A global or static variable may also have been stripped
8276 out by the linker if unused, in which case its address
8277 will be nullified; do not add such variables into partial
8278 symbol table then. */
8280 else if (pdi
->is_external
)
8283 Don't enter into the minimal symbol tables as there is
8284 a minimal symbol table entry from the ELF symbols already.
8285 Enter into partial symbol table if it has a location
8286 descriptor or a type.
8287 If the location descriptor is missing, new_symbol will create
8288 a LOC_UNRESOLVED symbol, the address of the variable will then
8289 be determined from the minimal symbol table whenever the variable
8291 The address for the partial symbol table entry is not
8292 used by GDB, but it comes in handy for debugging partial symbol
8295 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8297 psymbol
.domain
= VAR_DOMAIN
;
8298 psymbol
.aclass
= LOC_STATIC
;
8299 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8300 psymbol
.ginfo
.value
.address
= addr
;
8301 where
= psymbol_placement::GLOBAL
;
8306 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8308 /* Static Variable. Skip symbols whose value we cannot know (those
8309 without location descriptors or constant values). */
8310 if (!has_loc
&& !pdi
->has_const_value
)
8313 psymbol
.domain
= VAR_DOMAIN
;
8314 psymbol
.aclass
= LOC_STATIC
;
8315 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8317 psymbol
.ginfo
.value
.address
= addr
;
8318 where
= psymbol_placement::STATIC
;
8321 case DW_TAG_typedef
:
8322 case DW_TAG_base_type
:
8323 case DW_TAG_subrange_type
:
8324 psymbol
.domain
= VAR_DOMAIN
;
8325 psymbol
.aclass
= LOC_TYPEDEF
;
8326 where
= psymbol_placement::STATIC
;
8328 case DW_TAG_imported_declaration
:
8329 case DW_TAG_namespace
:
8330 psymbol
.domain
= VAR_DOMAIN
;
8331 psymbol
.aclass
= LOC_TYPEDEF
;
8332 where
= psymbol_placement::GLOBAL
;
8335 /* With Fortran 77 there might be a "BLOCK DATA" module
8336 available without any name. If so, we skip the module as it
8337 doesn't bring any value. */
8338 if (actual_name
!= nullptr)
8340 psymbol
.domain
= MODULE_DOMAIN
;
8341 psymbol
.aclass
= LOC_TYPEDEF
;
8342 where
= psymbol_placement::GLOBAL
;
8345 case DW_TAG_class_type
:
8346 case DW_TAG_interface_type
:
8347 case DW_TAG_structure_type
:
8348 case DW_TAG_union_type
:
8349 case DW_TAG_enumeration_type
:
8350 /* Skip external references. The DWARF standard says in the section
8351 about "Structure, Union, and Class Type Entries": "An incomplete
8352 structure, union or class type is represented by a structure,
8353 union or class entry that does not have a byte size attribute
8354 and that has a DW_AT_declaration attribute." */
8355 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8358 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8359 static vs. global. */
8360 psymbol
.domain
= STRUCT_DOMAIN
;
8361 psymbol
.aclass
= LOC_TYPEDEF
;
8362 where
= (cu
->language
== language_cplus
8363 ? psymbol_placement::GLOBAL
8364 : psymbol_placement::STATIC
);
8366 case DW_TAG_enumerator
:
8367 psymbol
.domain
= VAR_DOMAIN
;
8368 psymbol
.aclass
= LOC_CONST
;
8369 where
= (cu
->language
== language_cplus
8370 ? psymbol_placement::GLOBAL
8371 : psymbol_placement::STATIC
);
8377 if (where
.has_value ())
8379 if (built_actual_name
!= nullptr)
8380 actual_name
= objfile
->intern (actual_name
);
8381 psymbol
.ginfo
.set_linkage_name (actual_name
);
8382 add_psymbol_to_list (psymbol
, *where
, objfile
);
8386 /* Read a partial die corresponding to a namespace; also, add a symbol
8387 corresponding to that namespace to the symbol table. NAMESPACE is
8388 the name of the enclosing namespace. */
8391 add_partial_namespace (struct partial_die_info
*pdi
,
8392 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8393 int set_addrmap
, struct dwarf2_cu
*cu
)
8395 /* Add a symbol for the namespace. */
8397 add_partial_symbol (pdi
, cu
);
8399 /* Now scan partial symbols in that namespace. */
8401 if (pdi
->has_children
)
8402 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8405 /* Read a partial die corresponding to a Fortran module. */
8408 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8409 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8411 /* Add a symbol for the namespace. */
8413 add_partial_symbol (pdi
, cu
);
8415 /* Now scan partial symbols in that module. */
8417 if (pdi
->has_children
)
8418 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8421 /* Read a partial die corresponding to a subprogram or an inlined
8422 subprogram and create a partial symbol for that subprogram.
8423 When the CU language allows it, this routine also defines a partial
8424 symbol for each nested subprogram that this subprogram contains.
8425 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8426 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8428 PDI may also be a lexical block, in which case we simply search
8429 recursively for subprograms defined inside that lexical block.
8430 Again, this is only performed when the CU language allows this
8431 type of definitions. */
8434 add_partial_subprogram (struct partial_die_info
*pdi
,
8435 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8436 int set_addrmap
, struct dwarf2_cu
*cu
)
8438 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8440 if (pdi
->has_pc_info
)
8442 if (pdi
->lowpc
< *lowpc
)
8443 *lowpc
= pdi
->lowpc
;
8444 if (pdi
->highpc
> *highpc
)
8445 *highpc
= pdi
->highpc
;
8448 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
8449 struct gdbarch
*gdbarch
= objfile
->arch ();
8451 CORE_ADDR this_highpc
;
8452 CORE_ADDR this_lowpc
;
8454 baseaddr
= objfile
->text_section_offset ();
8456 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8457 pdi
->lowpc
+ baseaddr
)
8460 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8461 pdi
->highpc
+ baseaddr
)
8463 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8464 this_lowpc
, this_highpc
- 1,
8465 cu
->per_cu
->v
.psymtab
);
8469 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8471 if (!pdi
->is_declaration
)
8472 /* Ignore subprogram DIEs that do not have a name, they are
8473 illegal. Do not emit a complaint at this point, we will
8474 do so when we convert this psymtab into a symtab. */
8476 add_partial_symbol (pdi
, cu
);
8480 if (! pdi
->has_children
)
8483 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8485 pdi
= pdi
->die_child
;
8489 if (pdi
->tag
== DW_TAG_subprogram
8490 || pdi
->tag
== DW_TAG_inlined_subroutine
8491 || pdi
->tag
== DW_TAG_lexical_block
)
8492 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8493 pdi
= pdi
->die_sibling
;
8498 /* Read a partial die corresponding to an enumeration type. */
8501 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8502 struct dwarf2_cu
*cu
)
8504 struct partial_die_info
*pdi
;
8506 if (enum_pdi
->name
!= NULL
)
8507 add_partial_symbol (enum_pdi
, cu
);
8509 pdi
= enum_pdi
->die_child
;
8512 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8513 complaint (_("malformed enumerator DIE ignored"));
8515 add_partial_symbol (pdi
, cu
);
8516 pdi
= pdi
->die_sibling
;
8520 /* Return the initial uleb128 in the die at INFO_PTR. */
8523 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8525 unsigned int bytes_read
;
8527 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8530 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8531 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8533 Return the corresponding abbrev, or NULL if the number is zero (indicating
8534 an empty DIE). In either case *BYTES_READ will be set to the length of
8535 the initial number. */
8537 static struct abbrev_info
*
8538 peek_die_abbrev (const die_reader_specs
&reader
,
8539 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8541 dwarf2_cu
*cu
= reader
.cu
;
8542 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
8543 unsigned int abbrev_number
8544 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8546 if (abbrev_number
== 0)
8549 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8552 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8553 " at offset %s [in module %s]"),
8554 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8555 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8561 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8562 Returns a pointer to the end of a series of DIEs, terminated by an empty
8563 DIE. Any children of the skipped DIEs will also be skipped. */
8565 static const gdb_byte
*
8566 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8570 unsigned int bytes_read
;
8571 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8574 return info_ptr
+ bytes_read
;
8576 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8580 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8581 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8582 abbrev corresponding to that skipped uleb128 should be passed in
8583 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8586 static const gdb_byte
*
8587 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8588 struct abbrev_info
*abbrev
)
8590 unsigned int bytes_read
;
8591 struct attribute attr
;
8592 bfd
*abfd
= reader
->abfd
;
8593 struct dwarf2_cu
*cu
= reader
->cu
;
8594 const gdb_byte
*buffer
= reader
->buffer
;
8595 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8596 unsigned int form
, i
;
8598 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8600 /* The only abbrev we care about is DW_AT_sibling. */
8601 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8604 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
,
8606 if (attr
.form
== DW_FORM_ref_addr
)
8607 complaint (_("ignoring absolute DW_AT_sibling"));
8610 sect_offset off
= attr
.get_ref_die_offset ();
8611 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8613 if (sibling_ptr
< info_ptr
)
8614 complaint (_("DW_AT_sibling points backwards"));
8615 else if (sibling_ptr
> reader
->buffer_end
)
8616 reader
->die_section
->overflow_complaint ();
8622 /* If it isn't DW_AT_sibling, skip this attribute. */
8623 form
= abbrev
->attrs
[i
].form
;
8627 case DW_FORM_ref_addr
:
8628 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8629 and later it is offset sized. */
8630 if (cu
->header
.version
== 2)
8631 info_ptr
+= cu
->header
.addr_size
;
8633 info_ptr
+= cu
->header
.offset_size
;
8635 case DW_FORM_GNU_ref_alt
:
8636 info_ptr
+= cu
->header
.offset_size
;
8639 info_ptr
+= cu
->header
.addr_size
;
8647 case DW_FORM_flag_present
:
8648 case DW_FORM_implicit_const
:
8665 case DW_FORM_ref_sig8
:
8668 case DW_FORM_data16
:
8671 case DW_FORM_string
:
8672 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8673 info_ptr
+= bytes_read
;
8675 case DW_FORM_sec_offset
:
8677 case DW_FORM_GNU_strp_alt
:
8678 info_ptr
+= cu
->header
.offset_size
;
8680 case DW_FORM_exprloc
:
8682 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8683 info_ptr
+= bytes_read
;
8685 case DW_FORM_block1
:
8686 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8688 case DW_FORM_block2
:
8689 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8691 case DW_FORM_block4
:
8692 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8698 case DW_FORM_ref_udata
:
8699 case DW_FORM_GNU_addr_index
:
8700 case DW_FORM_GNU_str_index
:
8701 case DW_FORM_rnglistx
:
8702 case DW_FORM_loclistx
:
8703 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8705 case DW_FORM_indirect
:
8706 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8707 info_ptr
+= bytes_read
;
8708 /* We need to continue parsing from here, so just go back to
8710 goto skip_attribute
;
8713 error (_("Dwarf Error: Cannot handle %s "
8714 "in DWARF reader [in module %s]"),
8715 dwarf_form_name (form
),
8716 bfd_get_filename (abfd
));
8720 if (abbrev
->has_children
)
8721 return skip_children (reader
, info_ptr
);
8726 /* Locate ORIG_PDI's sibling.
8727 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8729 static const gdb_byte
*
8730 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8731 struct partial_die_info
*orig_pdi
,
8732 const gdb_byte
*info_ptr
)
8734 /* Do we know the sibling already? */
8736 if (orig_pdi
->sibling
)
8737 return orig_pdi
->sibling
;
8739 /* Are there any children to deal with? */
8741 if (!orig_pdi
->has_children
)
8744 /* Skip the children the long way. */
8746 return skip_children (reader
, info_ptr
);
8749 /* Expand this partial symbol table into a full symbol table. SELF is
8753 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
8755 struct dwarf2_per_objfile
*dwarf2_per_objfile
8756 = get_dwarf2_per_objfile (objfile
);
8758 gdb_assert (!readin
);
8759 /* If this psymtab is constructed from a debug-only objfile, the
8760 has_section_at_zero flag will not necessarily be correct. We
8761 can get the correct value for this flag by looking at the data
8762 associated with the (presumably stripped) associated objfile. */
8763 if (objfile
->separate_debug_objfile_backlink
)
8765 struct dwarf2_per_objfile
*dpo_backlink
8766 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
8768 dwarf2_per_objfile
->has_section_at_zero
8769 = dpo_backlink
->has_section_at_zero
;
8772 expand_psymtab (objfile
);
8774 process_cu_includes (dwarf2_per_objfile
);
8777 /* Reading in full CUs. */
8779 /* Add PER_CU to the queue. */
8782 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8783 enum language pretend_language
)
8786 per_cu
->dwarf2_per_objfile
->queue
.emplace (per_cu
, pretend_language
);
8789 /* If PER_CU is not yet queued, add it to the queue.
8790 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
8792 The result is non-zero if PER_CU was queued, otherwise the result is zero
8793 meaning either PER_CU is already queued or it is already loaded.
8795 N.B. There is an invariant here that if a CU is queued then it is loaded.
8796 The caller is required to load PER_CU if we return non-zero. */
8799 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
8800 struct dwarf2_per_cu_data
*per_cu
,
8801 enum language pretend_language
)
8803 /* We may arrive here during partial symbol reading, if we need full
8804 DIEs to process an unusual case (e.g. template arguments). Do
8805 not queue PER_CU, just tell our caller to load its DIEs. */
8806 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
8808 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
8813 /* Mark the dependence relation so that we don't flush PER_CU
8815 if (dependent_cu
!= NULL
)
8816 dwarf2_add_dependence (dependent_cu
, per_cu
);
8818 /* If it's already on the queue, we have nothing to do. */
8822 /* If the compilation unit is already loaded, just mark it as
8824 if (per_cu
->cu
!= NULL
)
8826 per_cu
->cu
->last_used
= 0;
8830 /* Add it to the queue. */
8831 queue_comp_unit (per_cu
, pretend_language
);
8836 /* Process the queue. */
8839 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8841 if (dwarf_read_debug
)
8843 fprintf_unfiltered (gdb_stdlog
,
8844 "Expanding one or more symtabs of objfile %s ...\n",
8845 objfile_name (dwarf2_per_objfile
->objfile
));
8848 /* The queue starts out with one item, but following a DIE reference
8849 may load a new CU, adding it to the end of the queue. */
8850 while (!dwarf2_per_objfile
->queue
.empty ())
8852 dwarf2_queue_item
&item
= dwarf2_per_objfile
->queue
.front ();
8854 if ((dwarf2_per_objfile
->using_index
8855 ? !item
.per_cu
->v
.quick
->compunit_symtab
8856 : (item
.per_cu
->v
.psymtab
&& !item
.per_cu
->v
.psymtab
->readin
))
8857 /* Skip dummy CUs. */
8858 && item
.per_cu
->cu
!= NULL
)
8860 struct dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
8861 unsigned int debug_print_threshold
;
8864 if (per_cu
->is_debug_types
)
8866 struct signatured_type
*sig_type
=
8867 (struct signatured_type
*) per_cu
;
8869 sprintf (buf
, "TU %s at offset %s",
8870 hex_string (sig_type
->signature
),
8871 sect_offset_str (per_cu
->sect_off
));
8872 /* There can be 100s of TUs.
8873 Only print them in verbose mode. */
8874 debug_print_threshold
= 2;
8878 sprintf (buf
, "CU at offset %s",
8879 sect_offset_str (per_cu
->sect_off
));
8880 debug_print_threshold
= 1;
8883 if (dwarf_read_debug
>= debug_print_threshold
)
8884 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
8886 if (per_cu
->is_debug_types
)
8887 process_full_type_unit (per_cu
, item
.pretend_language
);
8889 process_full_comp_unit (per_cu
, item
.pretend_language
);
8891 if (dwarf_read_debug
>= debug_print_threshold
)
8892 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
8895 item
.per_cu
->queued
= 0;
8896 dwarf2_per_objfile
->queue
.pop ();
8899 if (dwarf_read_debug
)
8901 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
8902 objfile_name (dwarf2_per_objfile
->objfile
));
8906 /* Read in full symbols for PST, and anything it depends on. */
8909 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
8911 gdb_assert (!readin
);
8913 expand_dependencies (objfile
);
8915 dw2_do_instantiate_symtab (per_cu_data
, false);
8916 gdb_assert (get_compunit_symtab () != nullptr);
8919 /* Trivial hash function for die_info: the hash value of a DIE
8920 is its offset in .debug_info for this objfile. */
8923 die_hash (const void *item
)
8925 const struct die_info
*die
= (const struct die_info
*) item
;
8927 return to_underlying (die
->sect_off
);
8930 /* Trivial comparison function for die_info structures: two DIEs
8931 are equal if they have the same offset. */
8934 die_eq (const void *item_lhs
, const void *item_rhs
)
8936 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
8937 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
8939 return die_lhs
->sect_off
== die_rhs
->sect_off
;
8942 /* Load the DIEs associated with PER_CU into memory. */
8945 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8947 enum language pretend_language
)
8949 gdb_assert (! this_cu
->is_debug_types
);
8951 cutu_reader
reader (this_cu
, NULL
, 1, skip_partial
);
8955 struct dwarf2_cu
*cu
= reader
.cu
;
8956 const gdb_byte
*info_ptr
= reader
.info_ptr
;
8958 gdb_assert (cu
->die_hash
== NULL
);
8960 htab_create_alloc_ex (cu
->header
.length
/ 12,
8964 &cu
->comp_unit_obstack
,
8965 hashtab_obstack_allocate
,
8966 dummy_obstack_deallocate
);
8968 if (reader
.comp_unit_die
->has_children
)
8969 reader
.comp_unit_die
->child
8970 = read_die_and_siblings (&reader
, reader
.info_ptr
,
8971 &info_ptr
, reader
.comp_unit_die
);
8972 cu
->dies
= reader
.comp_unit_die
;
8973 /* comp_unit_die is not stored in die_hash, no need. */
8975 /* We try not to read any attributes in this function, because not
8976 all CUs needed for references have been loaded yet, and symbol
8977 table processing isn't initialized. But we have to set the CU language,
8978 or we won't be able to build types correctly.
8979 Similarly, if we do not read the producer, we can not apply
8980 producer-specific interpretation. */
8981 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
8986 /* Add a DIE to the delayed physname list. */
8989 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
8990 const char *name
, struct die_info
*die
,
8991 struct dwarf2_cu
*cu
)
8993 struct delayed_method_info mi
;
8995 mi
.fnfield_index
= fnfield_index
;
8999 cu
->method_list
.push_back (mi
);
9002 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9003 "const" / "volatile". If so, decrements LEN by the length of the
9004 modifier and return true. Otherwise return false. */
9008 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9010 size_t mod_len
= sizeof (mod
) - 1;
9011 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9019 /* Compute the physnames of any methods on the CU's method list.
9021 The computation of method physnames is delayed in order to avoid the
9022 (bad) condition that one of the method's formal parameters is of an as yet
9026 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9028 /* Only C++ delays computing physnames. */
9029 if (cu
->method_list
.empty ())
9031 gdb_assert (cu
->language
== language_cplus
);
9033 for (const delayed_method_info
&mi
: cu
->method_list
)
9035 const char *physname
;
9036 struct fn_fieldlist
*fn_flp
9037 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9038 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9039 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9040 = physname
? physname
: "";
9042 /* Since there's no tag to indicate whether a method is a
9043 const/volatile overload, extract that information out of the
9045 if (physname
!= NULL
)
9047 size_t len
= strlen (physname
);
9051 if (physname
[len
] == ')') /* shortcut */
9053 else if (check_modifier (physname
, len
, " const"))
9054 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9055 else if (check_modifier (physname
, len
, " volatile"))
9056 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9063 /* The list is no longer needed. */
9064 cu
->method_list
.clear ();
9067 /* Go objects should be embedded in a DW_TAG_module DIE,
9068 and it's not clear if/how imported objects will appear.
9069 To keep Go support simple until that's worked out,
9070 go back through what we've read and create something usable.
9071 We could do this while processing each DIE, and feels kinda cleaner,
9072 but that way is more invasive.
9073 This is to, for example, allow the user to type "p var" or "b main"
9074 without having to specify the package name, and allow lookups
9075 of module.object to work in contexts that use the expression
9079 fixup_go_packaging (struct dwarf2_cu
*cu
)
9081 gdb::unique_xmalloc_ptr
<char> package_name
;
9082 struct pending
*list
;
9085 for (list
= *cu
->get_builder ()->get_global_symbols ();
9089 for (i
= 0; i
< list
->nsyms
; ++i
)
9091 struct symbol
*sym
= list
->symbol
[i
];
9093 if (sym
->language () == language_go
9094 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9096 gdb::unique_xmalloc_ptr
<char> this_package_name
9097 (go_symbol_package_name (sym
));
9099 if (this_package_name
== NULL
)
9101 if (package_name
== NULL
)
9102 package_name
= std::move (this_package_name
);
9105 struct objfile
*objfile
9106 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9107 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9108 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9109 (symbol_symtab (sym
) != NULL
9110 ? symtab_to_filename_for_display
9111 (symbol_symtab (sym
))
9112 : objfile_name (objfile
)),
9113 this_package_name
.get (), package_name
.get ());
9119 if (package_name
!= NULL
)
9121 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9122 const char *saved_package_name
= objfile
->intern (package_name
.get ());
9123 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9124 saved_package_name
);
9127 sym
= allocate_symbol (objfile
);
9128 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9129 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9130 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9131 e.g., "main" finds the "main" module and not C's main(). */
9132 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9133 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9134 SYMBOL_TYPE (sym
) = type
;
9136 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9140 /* Allocate a fully-qualified name consisting of the two parts on the
9144 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9146 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9149 /* A helper that allocates a variant part to attach to a Rust enum
9150 type. OBSTACK is where the results should be allocated. TYPE is
9151 the type we're processing. DISCRIMINANT_INDEX is the index of the
9152 discriminant. It must be the index of one of the fields of TYPE.
9153 DEFAULT_INDEX is the index of the default field; or -1 if there is
9154 no default. RANGES is indexed by "effective" field number (the
9155 field index, but omitting the discriminant and default fields) and
9156 must hold the discriminant values used by the variants. Note that
9157 RANGES must have a lifetime at least as long as OBSTACK -- either
9158 already allocated on it, or static. */
9161 alloc_rust_variant (struct obstack
*obstack
, struct type
*type
,
9162 int discriminant_index
, int default_index
,
9163 gdb::array_view
<discriminant_range
> ranges
)
9165 /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. Those
9166 must be handled by the caller. */
9167 gdb_assert (discriminant_index
>= 0
9168 && discriminant_index
< TYPE_NFIELDS (type
));
9169 gdb_assert (default_index
== -1
9170 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9172 /* We have one variant for each non-discriminant field. */
9173 int n_variants
= TYPE_NFIELDS (type
) - 1;
9175 variant
*variants
= new (obstack
) variant
[n_variants
];
9178 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9180 if (i
== discriminant_index
)
9183 variants
[var_idx
].first_field
= i
;
9184 variants
[var_idx
].last_field
= i
+ 1;
9186 /* The default field does not need a range, but other fields do.
9187 We skipped the discriminant above. */
9188 if (i
!= default_index
)
9190 variants
[var_idx
].discriminants
= ranges
.slice (range_idx
, 1);
9197 gdb_assert (range_idx
== ranges
.size ());
9198 gdb_assert (var_idx
== n_variants
);
9200 variant_part
*part
= new (obstack
) variant_part
;
9201 part
->discriminant_index
= discriminant_index
;
9202 part
->is_unsigned
= TYPE_UNSIGNED (TYPE_FIELD_TYPE (type
,
9203 discriminant_index
));
9204 part
->variants
= gdb::array_view
<variant
> (variants
, n_variants
);
9206 void *storage
= obstack_alloc (obstack
, sizeof (gdb::array_view
<variant_part
>));
9207 gdb::array_view
<variant_part
> *prop_value
9208 = new (storage
) gdb::array_view
<variant_part
> (part
, 1);
9210 struct dynamic_prop prop
;
9211 prop
.kind
= PROP_VARIANT_PARTS
;
9212 prop
.data
.variant_parts
= prop_value
;
9214 add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
, type
);
9217 /* Some versions of rustc emitted enums in an unusual way.
9219 Ordinary enums were emitted as unions. The first element of each
9220 structure in the union was named "RUST$ENUM$DISR". This element
9221 held the discriminant.
9223 These versions of Rust also implemented the "non-zero"
9224 optimization. When the enum had two values, and one is empty and
9225 the other holds a pointer that cannot be zero, the pointer is used
9226 as the discriminant, with a zero value meaning the empty variant.
9227 Here, the union's first member is of the form
9228 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9229 where the fieldnos are the indices of the fields that should be
9230 traversed in order to find the field (which may be several fields deep)
9231 and the variantname is the name of the variant of the case when the
9234 This function recognizes whether TYPE is of one of these forms,
9235 and, if so, smashes it to be a variant type. */
9238 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9240 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9242 /* We don't need to deal with empty enums. */
9243 if (TYPE_NFIELDS (type
) == 0)
9246 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9247 if (TYPE_NFIELDS (type
) == 1
9248 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9250 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9252 /* Decode the field name to find the offset of the
9254 ULONGEST bit_offset
= 0;
9255 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9256 while (name
[0] >= '0' && name
[0] <= '9')
9259 unsigned long index
= strtoul (name
, &tail
, 10);
9262 || index
>= TYPE_NFIELDS (field_type
)
9263 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9264 != FIELD_LOC_KIND_BITPOS
))
9266 complaint (_("Could not parse Rust enum encoding string \"%s\""
9268 TYPE_FIELD_NAME (type
, 0),
9269 objfile_name (objfile
));
9274 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9275 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9278 /* Smash this type to be a structure type. We have to do this
9279 because the type has already been recorded. */
9280 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9281 TYPE_NFIELDS (type
) = 3;
9282 /* Save the field we care about. */
9283 struct field saved_field
= TYPE_FIELD (type
, 0);
9285 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9287 /* Put the discriminant at index 0. */
9288 TYPE_FIELD_TYPE (type
, 0) = field_type
;
9289 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9290 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9291 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), bit_offset
);
9293 /* The order of fields doesn't really matter, so put the real
9294 field at index 1 and the data-less field at index 2. */
9295 TYPE_FIELD (type
, 1) = saved_field
;
9296 TYPE_FIELD_NAME (type
, 1)
9297 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (type
, 1)));
9298 TYPE_NAME (TYPE_FIELD_TYPE (type
, 1))
9299 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9300 TYPE_FIELD_NAME (type
, 1));
9302 const char *dataless_name
9303 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9305 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9307 TYPE_FIELD_TYPE (type
, 2) = dataless_type
;
9308 /* NAME points into the original discriminant name, which
9309 already has the correct lifetime. */
9310 TYPE_FIELD_NAME (type
, 2) = name
;
9311 SET_FIELD_BITPOS (TYPE_FIELD (type
, 2), 0);
9313 /* Indicate that this is a variant type. */
9314 static discriminant_range ranges
[1] = { { 0, 0 } };
9315 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1, ranges
);
9317 /* A union with a single anonymous field is probably an old-style
9319 else if (TYPE_NFIELDS (type
) == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9321 /* Smash this type to be a structure type. We have to do this
9322 because the type has already been recorded. */
9323 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9325 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9326 const char *variant_name
9327 = rust_last_path_segment (TYPE_NAME (field_type
));
9328 TYPE_FIELD_NAME (type
, 0) = variant_name
;
9329 TYPE_NAME (field_type
)
9330 = rust_fully_qualify (&objfile
->objfile_obstack
,
9331 TYPE_NAME (type
), variant_name
);
9335 struct type
*disr_type
= nullptr;
9336 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9338 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9340 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
9342 /* All fields of a true enum will be structs. */
9345 else if (TYPE_NFIELDS (disr_type
) == 0)
9347 /* Could be data-less variant, so keep going. */
9348 disr_type
= nullptr;
9350 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9351 "RUST$ENUM$DISR") != 0)
9353 /* Not a Rust enum. */
9363 /* If we got here without a discriminant, then it's probably
9365 if (disr_type
== nullptr)
9368 /* Smash this type to be a structure type. We have to do this
9369 because the type has already been recorded. */
9370 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9372 /* Make space for the discriminant field. */
9373 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
9375 = (struct field
*) TYPE_ZALLOC (type
, (TYPE_NFIELDS (type
)
9376 * sizeof (struct field
)));
9377 memcpy (new_fields
+ 1, TYPE_FIELDS (type
),
9378 TYPE_NFIELDS (type
) * sizeof (struct field
));
9379 TYPE_FIELDS (type
) = new_fields
;
9380 TYPE_NFIELDS (type
) = TYPE_NFIELDS (type
) + 1;
9382 /* Install the discriminant at index 0 in the union. */
9383 TYPE_FIELD (type
, 0) = *disr_field
;
9384 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9385 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9387 /* We need a way to find the correct discriminant given a
9388 variant name. For convenience we build a map here. */
9389 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
9390 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9391 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
9393 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9396 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9397 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9401 int n_fields
= TYPE_NFIELDS (type
);
9402 /* We don't need a range entry for the discriminant, but we do
9403 need one for every other field, as there is no default
9405 discriminant_range
*ranges
= XOBNEWVEC (&objfile
->objfile_obstack
,
9408 /* Skip the discriminant here. */
9409 for (int i
= 1; i
< n_fields
; ++i
)
9411 /* Find the final word in the name of this variant's type.
9412 That name can be used to look up the correct
9414 const char *variant_name
9415 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (type
, i
)));
9417 auto iter
= discriminant_map
.find (variant_name
);
9418 if (iter
!= discriminant_map
.end ())
9420 ranges
[i
].low
= iter
->second
;
9421 ranges
[i
].high
= iter
->second
;
9424 /* Remove the discriminant field, if it exists. */
9425 struct type
*sub_type
= TYPE_FIELD_TYPE (type
, i
);
9426 if (TYPE_NFIELDS (sub_type
) > 0)
9428 --TYPE_NFIELDS (sub_type
);
9429 ++TYPE_FIELDS (sub_type
);
9431 TYPE_FIELD_NAME (type
, i
) = variant_name
;
9432 TYPE_NAME (sub_type
)
9433 = rust_fully_qualify (&objfile
->objfile_obstack
,
9434 TYPE_NAME (type
), variant_name
);
9437 /* Indicate that this is a variant type. */
9438 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1,
9439 gdb::array_view
<discriminant_range
> (ranges
,
9444 /* Rewrite some Rust unions to be structures with variants parts. */
9447 rust_union_quirks (struct dwarf2_cu
*cu
)
9449 gdb_assert (cu
->language
== language_rust
);
9450 for (type
*type_
: cu
->rust_unions
)
9451 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
9452 /* We don't need this any more. */
9453 cu
->rust_unions
.clear ();
9456 /* Return the symtab for PER_CU. This works properly regardless of
9457 whether we're using the index or psymtabs. */
9459 static struct compunit_symtab
*
9460 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
9462 return (per_cu
->dwarf2_per_objfile
->using_index
9463 ? per_cu
->v
.quick
->compunit_symtab
9464 : per_cu
->v
.psymtab
->compunit_symtab
);
9467 /* A helper function for computing the list of all symbol tables
9468 included by PER_CU. */
9471 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9472 htab_t all_children
, htab_t all_type_symtabs
,
9473 struct dwarf2_per_cu_data
*per_cu
,
9474 struct compunit_symtab
*immediate_parent
)
9477 struct compunit_symtab
*cust
;
9479 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9482 /* This inclusion and its children have been processed. */
9487 /* Only add a CU if it has a symbol table. */
9488 cust
= get_compunit_symtab (per_cu
);
9491 /* If this is a type unit only add its symbol table if we haven't
9492 seen it yet (type unit per_cu's can share symtabs). */
9493 if (per_cu
->is_debug_types
)
9495 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9499 result
->push_back (cust
);
9500 if (cust
->user
== NULL
)
9501 cust
->user
= immediate_parent
;
9506 result
->push_back (cust
);
9507 if (cust
->user
== NULL
)
9508 cust
->user
= immediate_parent
;
9512 if (!per_cu
->imported_symtabs_empty ())
9513 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9515 recursively_compute_inclusions (result
, all_children
,
9516 all_type_symtabs
, ptr
, cust
);
9520 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9524 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
9526 gdb_assert (! per_cu
->is_debug_types
);
9528 if (!per_cu
->imported_symtabs_empty ())
9531 std::vector
<compunit_symtab
*> result_symtabs
;
9532 htab_t all_children
, all_type_symtabs
;
9533 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
9535 /* If we don't have a symtab, we can just skip this case. */
9539 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9540 NULL
, xcalloc
, xfree
);
9541 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9542 NULL
, xcalloc
, xfree
);
9544 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9546 recursively_compute_inclusions (&result_symtabs
, all_children
,
9547 all_type_symtabs
, ptr
, cust
);
9550 /* Now we have a transitive closure of all the included symtabs. */
9551 len
= result_symtabs
.size ();
9553 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
9554 struct compunit_symtab
*, len
+ 1);
9555 memcpy (cust
->includes
, result_symtabs
.data (),
9556 len
* sizeof (compunit_symtab
*));
9557 cust
->includes
[len
] = NULL
;
9559 htab_delete (all_children
);
9560 htab_delete (all_type_symtabs
);
9564 /* Compute the 'includes' field for the symtabs of all the CUs we just
9568 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9570 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
9572 if (! iter
->is_debug_types
)
9573 compute_compunit_symtab_includes (iter
);
9576 dwarf2_per_objfile
->just_read_cus
.clear ();
9579 /* Generate full symbol information for PER_CU, whose DIEs have
9580 already been loaded into memory. */
9583 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9584 enum language pretend_language
)
9586 struct dwarf2_cu
*cu
= per_cu
->cu
;
9587 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9588 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9589 struct gdbarch
*gdbarch
= objfile
->arch ();
9590 CORE_ADDR lowpc
, highpc
;
9591 struct compunit_symtab
*cust
;
9593 struct block
*static_block
;
9596 baseaddr
= objfile
->text_section_offset ();
9598 /* Clear the list here in case something was left over. */
9599 cu
->method_list
.clear ();
9601 cu
->language
= pretend_language
;
9602 cu
->language_defn
= language_def (cu
->language
);
9604 /* Do line number decoding in read_file_scope () */
9605 process_die (cu
->dies
, cu
);
9607 /* For now fudge the Go package. */
9608 if (cu
->language
== language_go
)
9609 fixup_go_packaging (cu
);
9611 /* Now that we have processed all the DIEs in the CU, all the types
9612 should be complete, and it should now be safe to compute all of the
9614 compute_delayed_physnames (cu
);
9616 if (cu
->language
== language_rust
)
9617 rust_union_quirks (cu
);
9619 /* Some compilers don't define a DW_AT_high_pc attribute for the
9620 compilation unit. If the DW_AT_high_pc is missing, synthesize
9621 it, by scanning the DIE's below the compilation unit. */
9622 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
9624 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
9625 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
9627 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
9628 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
9629 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
9630 addrmap to help ensure it has an accurate map of pc values belonging to
9632 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
9634 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
9635 SECT_OFF_TEXT (objfile
),
9640 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
9642 /* Set symtab language to language from DW_AT_language. If the
9643 compilation is from a C file generated by language preprocessors, do
9644 not set the language if it was already deduced by start_subfile. */
9645 if (!(cu
->language
== language_c
9646 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
9647 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9649 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
9650 produce DW_AT_location with location lists but it can be possibly
9651 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
9652 there were bugs in prologue debug info, fixed later in GCC-4.5
9653 by "unwind info for epilogues" patch (which is not directly related).
9655 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
9656 needed, it would be wrong due to missing DW_AT_producer there.
9658 Still one can confuse GDB by using non-standard GCC compilation
9659 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
9661 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
9662 cust
->locations_valid
= 1;
9664 if (gcc_4_minor
>= 5)
9665 cust
->epilogue_unwind_valid
= 1;
9667 cust
->call_site_htab
= cu
->call_site_htab
;
9670 if (dwarf2_per_objfile
->using_index
)
9671 per_cu
->v
.quick
->compunit_symtab
= cust
;
9674 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9675 pst
->compunit_symtab
= cust
;
9679 /* Push it for inclusion processing later. */
9680 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
9682 /* Not needed any more. */
9683 cu
->reset_builder ();
9686 /* Generate full symbol information for type unit PER_CU, whose DIEs have
9687 already been loaded into memory. */
9690 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
9691 enum language pretend_language
)
9693 struct dwarf2_cu
*cu
= per_cu
->cu
;
9694 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9695 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9696 struct compunit_symtab
*cust
;
9697 struct signatured_type
*sig_type
;
9699 gdb_assert (per_cu
->is_debug_types
);
9700 sig_type
= (struct signatured_type
*) per_cu
;
9702 /* Clear the list here in case something was left over. */
9703 cu
->method_list
.clear ();
9705 cu
->language
= pretend_language
;
9706 cu
->language_defn
= language_def (cu
->language
);
9708 /* The symbol tables are set up in read_type_unit_scope. */
9709 process_die (cu
->dies
, cu
);
9711 /* For now fudge the Go package. */
9712 if (cu
->language
== language_go
)
9713 fixup_go_packaging (cu
);
9715 /* Now that we have processed all the DIEs in the CU, all the types
9716 should be complete, and it should now be safe to compute all of the
9718 compute_delayed_physnames (cu
);
9720 if (cu
->language
== language_rust
)
9721 rust_union_quirks (cu
);
9723 /* TUs share symbol tables.
9724 If this is the first TU to use this symtab, complete the construction
9725 of it with end_expandable_symtab. Otherwise, complete the addition of
9726 this TU's symbols to the existing symtab. */
9727 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
9729 buildsym_compunit
*builder
= cu
->get_builder ();
9730 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
9731 sig_type
->type_unit_group
->compunit_symtab
= cust
;
9735 /* Set symtab language to language from DW_AT_language. If the
9736 compilation is from a C file generated by language preprocessors,
9737 do not set the language if it was already deduced by
9739 if (!(cu
->language
== language_c
9740 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
9741 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9746 cu
->get_builder ()->augment_type_symtab ();
9747 cust
= sig_type
->type_unit_group
->compunit_symtab
;
9750 if (dwarf2_per_objfile
->using_index
)
9751 per_cu
->v
.quick
->compunit_symtab
= cust
;
9754 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9755 pst
->compunit_symtab
= cust
;
9759 /* Not needed any more. */
9760 cu
->reset_builder ();
9763 /* Process an imported unit DIE. */
9766 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9768 struct attribute
*attr
;
9770 /* For now we don't handle imported units in type units. */
9771 if (cu
->per_cu
->is_debug_types
)
9773 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9774 " supported in type units [in module %s]"),
9775 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
9778 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9781 sect_offset sect_off
= attr
->get_ref_die_offset ();
9782 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
9783 dwarf2_per_cu_data
*per_cu
9784 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
9785 cu
->per_cu
->dwarf2_per_objfile
);
9787 /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit
9788 into another compilation unit, at root level. Regard this as a hint,
9790 if (die
->parent
&& die
->parent
->parent
== NULL
9791 && per_cu
->unit_type
== DW_UT_compile
9792 && per_cu
->lang
== language_cplus
)
9795 /* If necessary, add it to the queue and load its DIEs. */
9796 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
9797 load_full_comp_unit (per_cu
, false, cu
->language
);
9799 cu
->per_cu
->imported_symtabs_push (per_cu
);
9803 /* RAII object that represents a process_die scope: i.e.,
9804 starts/finishes processing a DIE. */
9805 class process_die_scope
9808 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
9809 : m_die (die
), m_cu (cu
)
9811 /* We should only be processing DIEs not already in process. */
9812 gdb_assert (!m_die
->in_process
);
9813 m_die
->in_process
= true;
9816 ~process_die_scope ()
9818 m_die
->in_process
= false;
9820 /* If we're done processing the DIE for the CU that owns the line
9821 header, we don't need the line header anymore. */
9822 if (m_cu
->line_header_die_owner
== m_die
)
9824 delete m_cu
->line_header
;
9825 m_cu
->line_header
= NULL
;
9826 m_cu
->line_header_die_owner
= NULL
;
9835 /* Process a die and its children. */
9838 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9840 process_die_scope
scope (die
, cu
);
9844 case DW_TAG_padding
:
9846 case DW_TAG_compile_unit
:
9847 case DW_TAG_partial_unit
:
9848 read_file_scope (die
, cu
);
9850 case DW_TAG_type_unit
:
9851 read_type_unit_scope (die
, cu
);
9853 case DW_TAG_subprogram
:
9854 /* Nested subprograms in Fortran get a prefix. */
9855 if (cu
->language
== language_fortran
9856 && die
->parent
!= NULL
9857 && die
->parent
->tag
== DW_TAG_subprogram
)
9858 cu
->processing_has_namespace_info
= true;
9860 case DW_TAG_inlined_subroutine
:
9861 read_func_scope (die
, cu
);
9863 case DW_TAG_lexical_block
:
9864 case DW_TAG_try_block
:
9865 case DW_TAG_catch_block
:
9866 read_lexical_block_scope (die
, cu
);
9868 case DW_TAG_call_site
:
9869 case DW_TAG_GNU_call_site
:
9870 read_call_site_scope (die
, cu
);
9872 case DW_TAG_class_type
:
9873 case DW_TAG_interface_type
:
9874 case DW_TAG_structure_type
:
9875 case DW_TAG_union_type
:
9876 process_structure_scope (die
, cu
);
9878 case DW_TAG_enumeration_type
:
9879 process_enumeration_scope (die
, cu
);
9882 /* These dies have a type, but processing them does not create
9883 a symbol or recurse to process the children. Therefore we can
9884 read them on-demand through read_type_die. */
9885 case DW_TAG_subroutine_type
:
9886 case DW_TAG_set_type
:
9887 case DW_TAG_array_type
:
9888 case DW_TAG_pointer_type
:
9889 case DW_TAG_ptr_to_member_type
:
9890 case DW_TAG_reference_type
:
9891 case DW_TAG_rvalue_reference_type
:
9892 case DW_TAG_string_type
:
9895 case DW_TAG_base_type
:
9896 case DW_TAG_subrange_type
:
9897 case DW_TAG_typedef
:
9898 /* Add a typedef symbol for the type definition, if it has a
9900 new_symbol (die
, read_type_die (die
, cu
), cu
);
9902 case DW_TAG_common_block
:
9903 read_common_block (die
, cu
);
9905 case DW_TAG_common_inclusion
:
9907 case DW_TAG_namespace
:
9908 cu
->processing_has_namespace_info
= true;
9909 read_namespace (die
, cu
);
9912 cu
->processing_has_namespace_info
= true;
9913 read_module (die
, cu
);
9915 case DW_TAG_imported_declaration
:
9916 cu
->processing_has_namespace_info
= true;
9917 if (read_namespace_alias (die
, cu
))
9919 /* The declaration is not a global namespace alias. */
9921 case DW_TAG_imported_module
:
9922 cu
->processing_has_namespace_info
= true;
9923 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
9924 || cu
->language
!= language_fortran
))
9925 complaint (_("Tag '%s' has unexpected children"),
9926 dwarf_tag_name (die
->tag
));
9927 read_import_statement (die
, cu
);
9930 case DW_TAG_imported_unit
:
9931 process_imported_unit_die (die
, cu
);
9934 case DW_TAG_variable
:
9935 read_variable (die
, cu
);
9939 new_symbol (die
, NULL
, cu
);
9944 /* DWARF name computation. */
9946 /* A helper function for dwarf2_compute_name which determines whether DIE
9947 needs to have the name of the scope prepended to the name listed in the
9951 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
9953 struct attribute
*attr
;
9957 case DW_TAG_namespace
:
9958 case DW_TAG_typedef
:
9959 case DW_TAG_class_type
:
9960 case DW_TAG_interface_type
:
9961 case DW_TAG_structure_type
:
9962 case DW_TAG_union_type
:
9963 case DW_TAG_enumeration_type
:
9964 case DW_TAG_enumerator
:
9965 case DW_TAG_subprogram
:
9966 case DW_TAG_inlined_subroutine
:
9968 case DW_TAG_imported_declaration
:
9971 case DW_TAG_variable
:
9972 case DW_TAG_constant
:
9973 /* We only need to prefix "globally" visible variables. These include
9974 any variable marked with DW_AT_external or any variable that
9975 lives in a namespace. [Variables in anonymous namespaces
9976 require prefixing, but they are not DW_AT_external.] */
9978 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
9980 struct dwarf2_cu
*spec_cu
= cu
;
9982 return die_needs_namespace (die_specification (die
, &spec_cu
),
9986 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9987 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
9988 && die
->parent
->tag
!= DW_TAG_module
)
9990 /* A variable in a lexical block of some kind does not need a
9991 namespace, even though in C++ such variables may be external
9992 and have a mangled name. */
9993 if (die
->parent
->tag
== DW_TAG_lexical_block
9994 || die
->parent
->tag
== DW_TAG_try_block
9995 || die
->parent
->tag
== DW_TAG_catch_block
9996 || die
->parent
->tag
== DW_TAG_subprogram
)
10005 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10006 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10007 defined for the given DIE. */
10009 static struct attribute
*
10010 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10012 struct attribute
*attr
;
10014 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10016 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10021 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10022 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10023 defined for the given DIE. */
10025 static const char *
10026 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10028 const char *linkage_name
;
10030 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10031 if (linkage_name
== NULL
)
10032 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10034 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10035 See https://github.com/rust-lang/rust/issues/32925. */
10036 if (cu
->language
== language_rust
&& linkage_name
!= NULL
10037 && strchr (linkage_name
, '{') != NULL
)
10038 linkage_name
= NULL
;
10040 return linkage_name
;
10043 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10044 compute the physname for the object, which include a method's:
10045 - formal parameters (C++),
10046 - receiver type (Go),
10048 The term "physname" is a bit confusing.
10049 For C++, for example, it is the demangled name.
10050 For Go, for example, it's the mangled name.
10052 For Ada, return the DIE's linkage name rather than the fully qualified
10053 name. PHYSNAME is ignored..
10055 The result is allocated on the objfile_obstack and canonicalized. */
10057 static const char *
10058 dwarf2_compute_name (const char *name
,
10059 struct die_info
*die
, struct dwarf2_cu
*cu
,
10062 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10065 name
= dwarf2_name (die
, cu
);
10067 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10068 but otherwise compute it by typename_concat inside GDB.
10069 FIXME: Actually this is not really true, or at least not always true.
10070 It's all very confusing. compute_and_set_names doesn't try to demangle
10071 Fortran names because there is no mangling standard. So new_symbol
10072 will set the demangled name to the result of dwarf2_full_name, and it is
10073 the demangled name that GDB uses if it exists. */
10074 if (cu
->language
== language_ada
10075 || (cu
->language
== language_fortran
&& physname
))
10077 /* For Ada unit, we prefer the linkage name over the name, as
10078 the former contains the exported name, which the user expects
10079 to be able to reference. Ideally, we want the user to be able
10080 to reference this entity using either natural or linkage name,
10081 but we haven't started looking at this enhancement yet. */
10082 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10084 if (linkage_name
!= NULL
)
10085 return linkage_name
;
10088 /* These are the only languages we know how to qualify names in. */
10090 && (cu
->language
== language_cplus
10091 || cu
->language
== language_fortran
|| cu
->language
== language_d
10092 || cu
->language
== language_rust
))
10094 if (die_needs_namespace (die
, cu
))
10096 const char *prefix
;
10097 const char *canonical_name
= NULL
;
10101 prefix
= determine_prefix (die
, cu
);
10102 if (*prefix
!= '\0')
10104 gdb::unique_xmalloc_ptr
<char> prefixed_name
10105 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10107 buf
.puts (prefixed_name
.get ());
10112 /* Template parameters may be specified in the DIE's DW_AT_name, or
10113 as children with DW_TAG_template_type_param or
10114 DW_TAG_value_type_param. If the latter, add them to the name
10115 here. If the name already has template parameters, then
10116 skip this step; some versions of GCC emit both, and
10117 it is more efficient to use the pre-computed name.
10119 Something to keep in mind about this process: it is very
10120 unlikely, or in some cases downright impossible, to produce
10121 something that will match the mangled name of a function.
10122 If the definition of the function has the same debug info,
10123 we should be able to match up with it anyway. But fallbacks
10124 using the minimal symbol, for instance to find a method
10125 implemented in a stripped copy of libstdc++, will not work.
10126 If we do not have debug info for the definition, we will have to
10127 match them up some other way.
10129 When we do name matching there is a related problem with function
10130 templates; two instantiated function templates are allowed to
10131 differ only by their return types, which we do not add here. */
10133 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10135 struct attribute
*attr
;
10136 struct die_info
*child
;
10139 die
->building_fullname
= 1;
10141 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10145 const gdb_byte
*bytes
;
10146 struct dwarf2_locexpr_baton
*baton
;
10149 if (child
->tag
!= DW_TAG_template_type_param
10150 && child
->tag
!= DW_TAG_template_value_param
)
10161 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10164 complaint (_("template parameter missing DW_AT_type"));
10165 buf
.puts ("UNKNOWN_TYPE");
10168 type
= die_type (child
, cu
);
10170 if (child
->tag
== DW_TAG_template_type_param
)
10172 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10173 &type_print_raw_options
);
10177 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10180 complaint (_("template parameter missing "
10181 "DW_AT_const_value"));
10182 buf
.puts ("UNKNOWN_VALUE");
10186 dwarf2_const_value_attr (attr
, type
, name
,
10187 &cu
->comp_unit_obstack
, cu
,
10188 &value
, &bytes
, &baton
);
10190 if (TYPE_NOSIGN (type
))
10191 /* GDB prints characters as NUMBER 'CHAR'. If that's
10192 changed, this can use value_print instead. */
10193 c_printchar (value
, type
, &buf
);
10196 struct value_print_options opts
;
10199 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10203 else if (bytes
!= NULL
)
10205 v
= allocate_value (type
);
10206 memcpy (value_contents_writeable (v
), bytes
,
10207 TYPE_LENGTH (type
));
10210 v
= value_from_longest (type
, value
);
10212 /* Specify decimal so that we do not depend on
10214 get_formatted_print_options (&opts
, 'd');
10216 value_print (v
, &buf
, &opts
);
10221 die
->building_fullname
= 0;
10225 /* Close the argument list, with a space if necessary
10226 (nested templates). */
10227 if (!buf
.empty () && buf
.string ().back () == '>')
10234 /* For C++ methods, append formal parameter type
10235 information, if PHYSNAME. */
10237 if (physname
&& die
->tag
== DW_TAG_subprogram
10238 && cu
->language
== language_cplus
)
10240 struct type
*type
= read_type_die (die
, cu
);
10242 c_type_print_args (type
, &buf
, 1, cu
->language
,
10243 &type_print_raw_options
);
10245 if (cu
->language
== language_cplus
)
10247 /* Assume that an artificial first parameter is
10248 "this", but do not crash if it is not. RealView
10249 marks unnamed (and thus unused) parameters as
10250 artificial; there is no way to differentiate
10252 if (TYPE_NFIELDS (type
) > 0
10253 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10254 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10255 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10257 buf
.puts (" const");
10261 const std::string
&intermediate_name
= buf
.string ();
10263 if (cu
->language
== language_cplus
)
10265 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10268 /* If we only computed INTERMEDIATE_NAME, or if
10269 INTERMEDIATE_NAME is already canonical, then we need to
10271 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10272 name
= objfile
->intern (intermediate_name
);
10274 name
= canonical_name
;
10281 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10282 If scope qualifiers are appropriate they will be added. The result
10283 will be allocated on the storage_obstack, or NULL if the DIE does
10284 not have a name. NAME may either be from a previous call to
10285 dwarf2_name or NULL.
10287 The output string will be canonicalized (if C++). */
10289 static const char *
10290 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10292 return dwarf2_compute_name (name
, die
, cu
, 0);
10295 /* Construct a physname for the given DIE in CU. NAME may either be
10296 from a previous call to dwarf2_name or NULL. The result will be
10297 allocated on the objfile_objstack or NULL if the DIE does not have a
10300 The output string will be canonicalized (if C++). */
10302 static const char *
10303 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10305 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10306 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10309 /* In this case dwarf2_compute_name is just a shortcut not building anything
10311 if (!die_needs_namespace (die
, cu
))
10312 return dwarf2_compute_name (name
, die
, cu
, 1);
10314 mangled
= dw2_linkage_name (die
, cu
);
10316 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10318 gdb::unique_xmalloc_ptr
<char> demangled
;
10319 if (mangled
!= NULL
)
10322 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10324 /* Do nothing (do not demangle the symbol name). */
10326 else if (cu
->language
== language_go
)
10328 /* This is a lie, but we already lie to the caller new_symbol.
10329 new_symbol assumes we return the mangled name.
10330 This just undoes that lie until things are cleaned up. */
10334 /* Use DMGL_RET_DROP for C++ template functions to suppress
10335 their return type. It is easier for GDB users to search
10336 for such functions as `name(params)' than `long name(params)'.
10337 In such case the minimal symbol names do not match the full
10338 symbol names but for template functions there is never a need
10339 to look up their definition from their declaration so
10340 the only disadvantage remains the minimal symbol variant
10341 `long name(params)' does not have the proper inferior type. */
10342 demangled
.reset (gdb_demangle (mangled
,
10343 (DMGL_PARAMS
| DMGL_ANSI
10344 | DMGL_RET_DROP
)));
10347 canon
= demangled
.get ();
10355 if (canon
== NULL
|| check_physname
)
10357 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10359 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10361 /* It may not mean a bug in GDB. The compiler could also
10362 compute DW_AT_linkage_name incorrectly. But in such case
10363 GDB would need to be bug-to-bug compatible. */
10365 complaint (_("Computed physname <%s> does not match demangled <%s> "
10366 "(from linkage <%s>) - DIE at %s [in module %s]"),
10367 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10368 objfile_name (objfile
));
10370 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10371 is available here - over computed PHYSNAME. It is safer
10372 against both buggy GDB and buggy compilers. */
10386 retval
= objfile
->intern (retval
);
10391 /* Inspect DIE in CU for a namespace alias. If one exists, record
10392 a new symbol for it.
10394 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10397 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10399 struct attribute
*attr
;
10401 /* If the die does not have a name, this is not a namespace
10403 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10407 struct die_info
*d
= die
;
10408 struct dwarf2_cu
*imported_cu
= cu
;
10410 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10411 keep inspecting DIEs until we hit the underlying import. */
10412 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10413 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10415 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10419 d
= follow_die_ref (d
, attr
, &imported_cu
);
10420 if (d
->tag
!= DW_TAG_imported_declaration
)
10424 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10426 complaint (_("DIE at %s has too many recursively imported "
10427 "declarations"), sect_offset_str (d
->sect_off
));
10434 sect_offset sect_off
= attr
->get_ref_die_offset ();
10436 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
10437 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
10439 /* This declaration is a global namespace alias. Add
10440 a symbol for it whose type is the aliased namespace. */
10441 new_symbol (die
, type
, cu
);
10450 /* Return the using directives repository (global or local?) to use in the
10451 current context for CU.
10453 For Ada, imported declarations can materialize renamings, which *may* be
10454 global. However it is impossible (for now?) in DWARF to distinguish
10455 "external" imported declarations and "static" ones. As all imported
10456 declarations seem to be static in all other languages, make them all CU-wide
10457 global only in Ada. */
10459 static struct using_direct
**
10460 using_directives (struct dwarf2_cu
*cu
)
10462 if (cu
->language
== language_ada
10463 && cu
->get_builder ()->outermost_context_p ())
10464 return cu
->get_builder ()->get_global_using_directives ();
10466 return cu
->get_builder ()->get_local_using_directives ();
10469 /* Read the import statement specified by the given die and record it. */
10472 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10474 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10475 struct attribute
*import_attr
;
10476 struct die_info
*imported_die
, *child_die
;
10477 struct dwarf2_cu
*imported_cu
;
10478 const char *imported_name
;
10479 const char *imported_name_prefix
;
10480 const char *canonical_name
;
10481 const char *import_alias
;
10482 const char *imported_declaration
= NULL
;
10483 const char *import_prefix
;
10484 std::vector
<const char *> excludes
;
10486 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10487 if (import_attr
== NULL
)
10489 complaint (_("Tag '%s' has no DW_AT_import"),
10490 dwarf_tag_name (die
->tag
));
10495 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10496 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10497 if (imported_name
== NULL
)
10499 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10501 The import in the following code:
10515 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10516 <52> DW_AT_decl_file : 1
10517 <53> DW_AT_decl_line : 6
10518 <54> DW_AT_import : <0x75>
10519 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10520 <59> DW_AT_name : B
10521 <5b> DW_AT_decl_file : 1
10522 <5c> DW_AT_decl_line : 2
10523 <5d> DW_AT_type : <0x6e>
10525 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10526 <76> DW_AT_byte_size : 4
10527 <77> DW_AT_encoding : 5 (signed)
10529 imports the wrong die ( 0x75 instead of 0x58 ).
10530 This case will be ignored until the gcc bug is fixed. */
10534 /* Figure out the local name after import. */
10535 import_alias
= dwarf2_name (die
, cu
);
10537 /* Figure out where the statement is being imported to. */
10538 import_prefix
= determine_prefix (die
, cu
);
10540 /* Figure out what the scope of the imported die is and prepend it
10541 to the name of the imported die. */
10542 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10544 if (imported_die
->tag
!= DW_TAG_namespace
10545 && imported_die
->tag
!= DW_TAG_module
)
10547 imported_declaration
= imported_name
;
10548 canonical_name
= imported_name_prefix
;
10550 else if (strlen (imported_name_prefix
) > 0)
10551 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10552 imported_name_prefix
,
10553 (cu
->language
== language_d
? "." : "::"),
10554 imported_name
, (char *) NULL
);
10556 canonical_name
= imported_name
;
10558 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10559 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10560 child_die
= child_die
->sibling
)
10562 /* DWARF-4: A Fortran use statement with a “rename list” may be
10563 represented by an imported module entry with an import attribute
10564 referring to the module and owned entries corresponding to those
10565 entities that are renamed as part of being imported. */
10567 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10569 complaint (_("child DW_TAG_imported_declaration expected "
10570 "- DIE at %s [in module %s]"),
10571 sect_offset_str (child_die
->sect_off
),
10572 objfile_name (objfile
));
10576 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10577 if (import_attr
== NULL
)
10579 complaint (_("Tag '%s' has no DW_AT_import"),
10580 dwarf_tag_name (child_die
->tag
));
10585 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10587 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10588 if (imported_name
== NULL
)
10590 complaint (_("child DW_TAG_imported_declaration has unknown "
10591 "imported name - DIE at %s [in module %s]"),
10592 sect_offset_str (child_die
->sect_off
),
10593 objfile_name (objfile
));
10597 excludes
.push_back (imported_name
);
10599 process_die (child_die
, cu
);
10602 add_using_directive (using_directives (cu
),
10606 imported_declaration
,
10609 &objfile
->objfile_obstack
);
10612 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10613 types, but gives them a size of zero. Starting with version 14,
10614 ICC is compatible with GCC. */
10617 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10619 if (!cu
->checked_producer
)
10620 check_producer (cu
);
10622 return cu
->producer_is_icc_lt_14
;
10625 /* ICC generates a DW_AT_type for C void functions. This was observed on
10626 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
10627 which says that void functions should not have a DW_AT_type. */
10630 producer_is_icc (struct dwarf2_cu
*cu
)
10632 if (!cu
->checked_producer
)
10633 check_producer (cu
);
10635 return cu
->producer_is_icc
;
10638 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
10639 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
10640 this, it was first present in GCC release 4.3.0. */
10643 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
10645 if (!cu
->checked_producer
)
10646 check_producer (cu
);
10648 return cu
->producer_is_gcc_lt_4_3
;
10651 static file_and_directory
10652 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
10654 file_and_directory res
;
10656 /* Find the filename. Do not use dwarf2_name here, since the filename
10657 is not a source language identifier. */
10658 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
10659 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
10661 if (res
.comp_dir
== NULL
10662 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
10663 && IS_ABSOLUTE_PATH (res
.name
))
10665 res
.comp_dir_storage
= ldirname (res
.name
);
10666 if (!res
.comp_dir_storage
.empty ())
10667 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
10669 if (res
.comp_dir
!= NULL
)
10671 /* Irix 6.2 native cc prepends <machine>.: to the compilation
10672 directory, get rid of it. */
10673 const char *cp
= strchr (res
.comp_dir
, ':');
10675 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
10676 res
.comp_dir
= cp
+ 1;
10679 if (res
.name
== NULL
)
10680 res
.name
= "<unknown>";
10685 /* Handle DW_AT_stmt_list for a compilation unit.
10686 DIE is the DW_TAG_compile_unit die for CU.
10687 COMP_DIR is the compilation directory. LOWPC is passed to
10688 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
10691 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
10692 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
10694 struct dwarf2_per_objfile
*dwarf2_per_objfile
10695 = cu
->per_cu
->dwarf2_per_objfile
;
10696 struct attribute
*attr
;
10697 struct line_header line_header_local
;
10698 hashval_t line_header_local_hash
;
10700 int decode_mapping
;
10702 gdb_assert (! cu
->per_cu
->is_debug_types
);
10704 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10708 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10710 /* The line header hash table is only created if needed (it exists to
10711 prevent redundant reading of the line table for partial_units).
10712 If we're given a partial_unit, we'll need it. If we're given a
10713 compile_unit, then use the line header hash table if it's already
10714 created, but don't create one just yet. */
10716 if (dwarf2_per_objfile
->line_header_hash
== NULL
10717 && die
->tag
== DW_TAG_partial_unit
)
10719 dwarf2_per_objfile
->line_header_hash
10720 .reset (htab_create_alloc (127, line_header_hash_voidp
,
10721 line_header_eq_voidp
,
10722 free_line_header_voidp
,
10726 line_header_local
.sect_off
= line_offset
;
10727 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
10728 line_header_local_hash
= line_header_hash (&line_header_local
);
10729 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
10731 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
.get (),
10732 &line_header_local
,
10733 line_header_local_hash
, NO_INSERT
);
10735 /* For DW_TAG_compile_unit we need info like symtab::linetable which
10736 is not present in *SLOT (since if there is something in *SLOT then
10737 it will be for a partial_unit). */
10738 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
10740 gdb_assert (*slot
!= NULL
);
10741 cu
->line_header
= (struct line_header
*) *slot
;
10746 /* dwarf_decode_line_header does not yet provide sufficient information.
10747 We always have to call also dwarf_decode_lines for it. */
10748 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
10752 cu
->line_header
= lh
.release ();
10753 cu
->line_header_die_owner
= die
;
10755 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
10759 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
.get (),
10760 &line_header_local
,
10761 line_header_local_hash
, INSERT
);
10762 gdb_assert (slot
!= NULL
);
10764 if (slot
!= NULL
&& *slot
== NULL
)
10766 /* This newly decoded line number information unit will be owned
10767 by line_header_hash hash table. */
10768 *slot
= cu
->line_header
;
10769 cu
->line_header_die_owner
= NULL
;
10773 /* We cannot free any current entry in (*slot) as that struct line_header
10774 may be already used by multiple CUs. Create only temporary decoded
10775 line_header for this CU - it may happen at most once for each line
10776 number information unit. And if we're not using line_header_hash
10777 then this is what we want as well. */
10778 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
10780 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
10781 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
10786 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
10789 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10791 struct dwarf2_per_objfile
*dwarf2_per_objfile
10792 = cu
->per_cu
->dwarf2_per_objfile
;
10793 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10794 struct gdbarch
*gdbarch
= objfile
->arch ();
10795 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
10796 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
10797 struct attribute
*attr
;
10798 struct die_info
*child_die
;
10799 CORE_ADDR baseaddr
;
10801 prepare_one_comp_unit (cu
, die
, cu
->language
);
10802 baseaddr
= objfile
->text_section_offset ();
10804 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
10806 /* If we didn't find a lowpc, set it to highpc to avoid complaints
10807 from finish_block. */
10808 if (lowpc
== ((CORE_ADDR
) -1))
10810 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
10812 file_and_directory fnd
= find_file_and_directory (die
, cu
);
10814 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
10815 standardised yet. As a workaround for the language detection we fall
10816 back to the DW_AT_producer string. */
10817 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
10818 cu
->language
= language_opencl
;
10820 /* Similar hack for Go. */
10821 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
10822 set_cu_language (DW_LANG_Go
, cu
);
10824 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
10826 /* Decode line number information if present. We do this before
10827 processing child DIEs, so that the line header table is available
10828 for DW_AT_decl_file. */
10829 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
10831 /* Process all dies in compilation unit. */
10832 if (die
->child
!= NULL
)
10834 child_die
= die
->child
;
10835 while (child_die
&& child_die
->tag
)
10837 process_die (child_die
, cu
);
10838 child_die
= child_die
->sibling
;
10842 /* Decode macro information, if present. Dwarf 2 macro information
10843 refers to information in the line number info statement program
10844 header, so we can only read it if we've read the header
10846 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
10848 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
10849 if (attr
&& cu
->line_header
)
10851 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
10852 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
10854 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
10858 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
10859 if (attr
&& cu
->line_header
)
10861 unsigned int macro_offset
= DW_UNSND (attr
);
10863 dwarf_decode_macros (cu
, macro_offset
, 0);
10869 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
10871 struct type_unit_group
*tu_group
;
10873 struct attribute
*attr
;
10875 struct signatured_type
*sig_type
;
10877 gdb_assert (per_cu
->is_debug_types
);
10878 sig_type
= (struct signatured_type
*) per_cu
;
10880 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
10882 /* If we're using .gdb_index (includes -readnow) then
10883 per_cu->type_unit_group may not have been set up yet. */
10884 if (sig_type
->type_unit_group
== NULL
)
10885 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
10886 tu_group
= sig_type
->type_unit_group
;
10888 /* If we've already processed this stmt_list there's no real need to
10889 do it again, we could fake it and just recreate the part we need
10890 (file name,index -> symtab mapping). If data shows this optimization
10891 is useful we can do it then. */
10892 first_time
= tu_group
->compunit_symtab
== NULL
;
10894 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
10899 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10900 lh
= dwarf_decode_line_header (line_offset
, this);
10905 start_symtab ("", NULL
, 0);
10908 gdb_assert (tu_group
->symtabs
== NULL
);
10909 gdb_assert (m_builder
== nullptr);
10910 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
10911 m_builder
.reset (new struct buildsym_compunit
10912 (COMPUNIT_OBJFILE (cust
), "",
10913 COMPUNIT_DIRNAME (cust
),
10914 compunit_language (cust
),
10920 line_header
= lh
.release ();
10921 line_header_die_owner
= die
;
10925 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
10927 /* Note: We don't assign tu_group->compunit_symtab yet because we're
10928 still initializing it, and our caller (a few levels up)
10929 process_full_type_unit still needs to know if this is the first
10933 = XOBNEWVEC (&COMPUNIT_OBJFILE (cust
)->objfile_obstack
,
10934 struct symtab
*, line_header
->file_names_size ());
10936 auto &file_names
= line_header
->file_names ();
10937 for (i
= 0; i
< file_names
.size (); ++i
)
10939 file_entry
&fe
= file_names
[i
];
10940 dwarf2_start_subfile (this, fe
.name
,
10941 fe
.include_dir (line_header
));
10942 buildsym_compunit
*b
= get_builder ();
10943 if (b
->get_current_subfile ()->symtab
== NULL
)
10945 /* NOTE: start_subfile will recognize when it's been
10946 passed a file it has already seen. So we can't
10947 assume there's a simple mapping from
10948 cu->line_header->file_names to subfiles, plus
10949 cu->line_header->file_names may contain dups. */
10950 b
->get_current_subfile ()->symtab
10951 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
10954 fe
.symtab
= b
->get_current_subfile ()->symtab
;
10955 tu_group
->symtabs
[i
] = fe
.symtab
;
10960 gdb_assert (m_builder
== nullptr);
10961 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
10962 m_builder
.reset (new struct buildsym_compunit
10963 (COMPUNIT_OBJFILE (cust
), "",
10964 COMPUNIT_DIRNAME (cust
),
10965 compunit_language (cust
),
10968 auto &file_names
= line_header
->file_names ();
10969 for (i
= 0; i
< file_names
.size (); ++i
)
10971 file_entry
&fe
= file_names
[i
];
10972 fe
.symtab
= tu_group
->symtabs
[i
];
10976 /* The main symtab is allocated last. Type units don't have DW_AT_name
10977 so they don't have a "real" (so to speak) symtab anyway.
10978 There is later code that will assign the main symtab to all symbols
10979 that don't have one. We need to handle the case of a symbol with a
10980 missing symtab (DW_AT_decl_file) anyway. */
10983 /* Process DW_TAG_type_unit.
10984 For TUs we want to skip the first top level sibling if it's not the
10985 actual type being defined by this TU. In this case the first top
10986 level sibling is there to provide context only. */
10989 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10991 struct die_info
*child_die
;
10993 prepare_one_comp_unit (cu
, die
, language_minimal
);
10995 /* Initialize (or reinitialize) the machinery for building symtabs.
10996 We do this before processing child DIEs, so that the line header table
10997 is available for DW_AT_decl_file. */
10998 cu
->setup_type_unit_groups (die
);
11000 if (die
->child
!= NULL
)
11002 child_die
= die
->child
;
11003 while (child_die
&& child_die
->tag
)
11005 process_die (child_die
, cu
);
11006 child_die
= child_die
->sibling
;
11013 http://gcc.gnu.org/wiki/DebugFission
11014 http://gcc.gnu.org/wiki/DebugFissionDWP
11016 To simplify handling of both DWO files ("object" files with the DWARF info)
11017 and DWP files (a file with the DWOs packaged up into one file), we treat
11018 DWP files as having a collection of virtual DWO files. */
11021 hash_dwo_file (const void *item
)
11023 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11026 hash
= htab_hash_string (dwo_file
->dwo_name
);
11027 if (dwo_file
->comp_dir
!= NULL
)
11028 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11033 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11035 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11036 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11038 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11040 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11041 return lhs
->comp_dir
== rhs
->comp_dir
;
11042 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11045 /* Allocate a hash table for DWO files. */
11048 allocate_dwo_file_hash_table ()
11050 auto delete_dwo_file
= [] (void *item
)
11052 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11057 return htab_up (htab_create_alloc (41,
11064 /* Lookup DWO file DWO_NAME. */
11067 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11068 const char *dwo_name
,
11069 const char *comp_dir
)
11071 struct dwo_file find_entry
;
11074 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11075 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
11077 find_entry
.dwo_name
= dwo_name
;
11078 find_entry
.comp_dir
= comp_dir
;
11079 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
.get (), &find_entry
,
11086 hash_dwo_unit (const void *item
)
11088 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11090 /* This drops the top 32 bits of the id, but is ok for a hash. */
11091 return dwo_unit
->signature
;
11095 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11097 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11098 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11100 /* The signature is assumed to be unique within the DWO file.
11101 So while object file CU dwo_id's always have the value zero,
11102 that's OK, assuming each object file DWO file has only one CU,
11103 and that's the rule for now. */
11104 return lhs
->signature
== rhs
->signature
;
11107 /* Allocate a hash table for DWO CUs,TUs.
11108 There is one of these tables for each of CUs,TUs for each DWO file. */
11111 allocate_dwo_unit_table ()
11113 /* Start out with a pretty small number.
11114 Generally DWO files contain only one CU and maybe some TUs. */
11115 return htab_up (htab_create_alloc (3,
11118 NULL
, xcalloc
, xfree
));
11121 /* die_reader_func for create_dwo_cu. */
11124 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11125 const gdb_byte
*info_ptr
,
11126 struct die_info
*comp_unit_die
,
11127 struct dwo_file
*dwo_file
,
11128 struct dwo_unit
*dwo_unit
)
11130 struct dwarf2_cu
*cu
= reader
->cu
;
11131 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11132 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11134 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11135 if (!signature
.has_value ())
11137 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11138 " its dwo_id [in module %s]"),
11139 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11143 dwo_unit
->dwo_file
= dwo_file
;
11144 dwo_unit
->signature
= *signature
;
11145 dwo_unit
->section
= section
;
11146 dwo_unit
->sect_off
= sect_off
;
11147 dwo_unit
->length
= cu
->per_cu
->length
;
11149 if (dwarf_read_debug
)
11150 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11151 sect_offset_str (sect_off
),
11152 hex_string (dwo_unit
->signature
));
11155 /* Create the dwo_units for the CUs in a DWO_FILE.
11156 Note: This function processes DWO files only, not DWP files. */
11159 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11160 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11161 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11163 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11164 const gdb_byte
*info_ptr
, *end_ptr
;
11166 section
.read (objfile
);
11167 info_ptr
= section
.buffer
;
11169 if (info_ptr
== NULL
)
11172 if (dwarf_read_debug
)
11174 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11175 section
.get_name (),
11176 section
.get_file_name ());
11179 end_ptr
= info_ptr
+ section
.size
;
11180 while (info_ptr
< end_ptr
)
11182 struct dwarf2_per_cu_data per_cu
;
11183 struct dwo_unit read_unit
{};
11184 struct dwo_unit
*dwo_unit
;
11186 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11188 memset (&per_cu
, 0, sizeof (per_cu
));
11189 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11190 per_cu
.is_debug_types
= 0;
11191 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11192 per_cu
.section
= §ion
;
11194 cutu_reader
reader (&per_cu
, cu
, &dwo_file
);
11195 if (!reader
.dummy_p
)
11196 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11197 &dwo_file
, &read_unit
);
11198 info_ptr
+= per_cu
.length
;
11200 // If the unit could not be parsed, skip it.
11201 if (read_unit
.dwo_file
== NULL
)
11204 if (cus_htab
== NULL
)
11205 cus_htab
= allocate_dwo_unit_table ();
11207 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11208 *dwo_unit
= read_unit
;
11209 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11210 gdb_assert (slot
!= NULL
);
11213 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11214 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11216 complaint (_("debug cu entry at offset %s is duplicate to"
11217 " the entry at offset %s, signature %s"),
11218 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11219 hex_string (dwo_unit
->signature
));
11221 *slot
= (void *)dwo_unit
;
11225 /* DWP file .debug_{cu,tu}_index section format:
11226 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11230 Both index sections have the same format, and serve to map a 64-bit
11231 signature to a set of section numbers. Each section begins with a header,
11232 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11233 indexes, and a pool of 32-bit section numbers. The index sections will be
11234 aligned at 8-byte boundaries in the file.
11236 The index section header consists of:
11238 V, 32 bit version number
11240 N, 32 bit number of compilation units or type units in the index
11241 M, 32 bit number of slots in the hash table
11243 Numbers are recorded using the byte order of the application binary.
11245 The hash table begins at offset 16 in the section, and consists of an array
11246 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11247 order of the application binary). Unused slots in the hash table are 0.
11248 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11250 The parallel table begins immediately after the hash table
11251 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11252 array of 32-bit indexes (using the byte order of the application binary),
11253 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11254 table contains a 32-bit index into the pool of section numbers. For unused
11255 hash table slots, the corresponding entry in the parallel table will be 0.
11257 The pool of section numbers begins immediately following the hash table
11258 (at offset 16 + 12 * M from the beginning of the section). The pool of
11259 section numbers consists of an array of 32-bit words (using the byte order
11260 of the application binary). Each item in the array is indexed starting
11261 from 0. The hash table entry provides the index of the first section
11262 number in the set. Additional section numbers in the set follow, and the
11263 set is terminated by a 0 entry (section number 0 is not used in ELF).
11265 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11266 section must be the first entry in the set, and the .debug_abbrev.dwo must
11267 be the second entry. Other members of the set may follow in any order.
11273 DWP Version 2 combines all the .debug_info, etc. sections into one,
11274 and the entries in the index tables are now offsets into these sections.
11275 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11278 Index Section Contents:
11280 Hash Table of Signatures dwp_hash_table.hash_table
11281 Parallel Table of Indices dwp_hash_table.unit_table
11282 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11283 Table of Section Sizes dwp_hash_table.v2.sizes
11285 The index section header consists of:
11287 V, 32 bit version number
11288 L, 32 bit number of columns in the table of section offsets
11289 N, 32 bit number of compilation units or type units in the index
11290 M, 32 bit number of slots in the hash table
11292 Numbers are recorded using the byte order of the application binary.
11294 The hash table has the same format as version 1.
11295 The parallel table of indices has the same format as version 1,
11296 except that the entries are origin-1 indices into the table of sections
11297 offsets and the table of section sizes.
11299 The table of offsets begins immediately following the parallel table
11300 (at offset 16 + 12 * M from the beginning of the section). The table is
11301 a two-dimensional array of 32-bit words (using the byte order of the
11302 application binary), with L columns and N+1 rows, in row-major order.
11303 Each row in the array is indexed starting from 0. The first row provides
11304 a key to the remaining rows: each column in this row provides an identifier
11305 for a debug section, and the offsets in the same column of subsequent rows
11306 refer to that section. The section identifiers are:
11308 DW_SECT_INFO 1 .debug_info.dwo
11309 DW_SECT_TYPES 2 .debug_types.dwo
11310 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11311 DW_SECT_LINE 4 .debug_line.dwo
11312 DW_SECT_LOC 5 .debug_loc.dwo
11313 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11314 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11315 DW_SECT_MACRO 8 .debug_macro.dwo
11317 The offsets provided by the CU and TU index sections are the base offsets
11318 for the contributions made by each CU or TU to the corresponding section
11319 in the package file. Each CU and TU header contains an abbrev_offset
11320 field, used to find the abbreviations table for that CU or TU within the
11321 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11322 be interpreted as relative to the base offset given in the index section.
11323 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11324 should be interpreted as relative to the base offset for .debug_line.dwo,
11325 and offsets into other debug sections obtained from DWARF attributes should
11326 also be interpreted as relative to the corresponding base offset.
11328 The table of sizes begins immediately following the table of offsets.
11329 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11330 with L columns and N rows, in row-major order. Each row in the array is
11331 indexed starting from 1 (row 0 is shared by the two tables).
11335 Hash table lookup is handled the same in version 1 and 2:
11337 We assume that N and M will not exceed 2^32 - 1.
11338 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11340 Given a 64-bit compilation unit signature or a type signature S, an entry
11341 in the hash table is located as follows:
11343 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11344 the low-order k bits all set to 1.
11346 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11348 3) If the hash table entry at index H matches the signature, use that
11349 entry. If the hash table entry at index H is unused (all zeroes),
11350 terminate the search: the signature is not present in the table.
11352 4) Let H = (H + H') modulo M. Repeat at Step 3.
11354 Because M > N and H' and M are relatively prime, the search is guaranteed
11355 to stop at an unused slot or find the match. */
11357 /* Create a hash table to map DWO IDs to their CU/TU entry in
11358 .debug_{info,types}.dwo in DWP_FILE.
11359 Returns NULL if there isn't one.
11360 Note: This function processes DWP files only, not DWO files. */
11362 static struct dwp_hash_table
*
11363 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11364 struct dwp_file
*dwp_file
, int is_debug_types
)
11366 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11367 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11368 const gdb_byte
*index_ptr
, *index_end
;
11369 struct dwarf2_section_info
*index
;
11370 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11371 struct dwp_hash_table
*htab
;
11373 if (is_debug_types
)
11374 index
= &dwp_file
->sections
.tu_index
;
11376 index
= &dwp_file
->sections
.cu_index
;
11378 if (index
->empty ())
11380 index
->read (objfile
);
11382 index_ptr
= index
->buffer
;
11383 index_end
= index_ptr
+ index
->size
;
11385 version
= read_4_bytes (dbfd
, index_ptr
);
11388 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11392 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11394 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11397 if (version
!= 1 && version
!= 2)
11399 error (_("Dwarf Error: unsupported DWP file version (%s)"
11400 " [in module %s]"),
11401 pulongest (version
), dwp_file
->name
);
11403 if (nr_slots
!= (nr_slots
& -nr_slots
))
11405 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11406 " is not power of 2 [in module %s]"),
11407 pulongest (nr_slots
), dwp_file
->name
);
11410 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
11411 htab
->version
= version
;
11412 htab
->nr_columns
= nr_columns
;
11413 htab
->nr_units
= nr_units
;
11414 htab
->nr_slots
= nr_slots
;
11415 htab
->hash_table
= index_ptr
;
11416 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11418 /* Exit early if the table is empty. */
11419 if (nr_slots
== 0 || nr_units
== 0
11420 || (version
== 2 && nr_columns
== 0))
11422 /* All must be zero. */
11423 if (nr_slots
!= 0 || nr_units
!= 0
11424 || (version
== 2 && nr_columns
!= 0))
11426 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11427 " all zero [in modules %s]"),
11435 htab
->section_pool
.v1
.indices
=
11436 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11437 /* It's harder to decide whether the section is too small in v1.
11438 V1 is deprecated anyway so we punt. */
11442 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11443 int *ids
= htab
->section_pool
.v2
.section_ids
;
11444 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11445 /* Reverse map for error checking. */
11446 int ids_seen
[DW_SECT_MAX
+ 1];
11449 if (nr_columns
< 2)
11451 error (_("Dwarf Error: bad DWP hash table, too few columns"
11452 " in section table [in module %s]"),
11455 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11457 error (_("Dwarf Error: bad DWP hash table, too many columns"
11458 " in section table [in module %s]"),
11461 memset (ids
, 255, sizeof_ids
);
11462 memset (ids_seen
, 255, sizeof (ids_seen
));
11463 for (i
= 0; i
< nr_columns
; ++i
)
11465 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11467 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11469 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11470 " in section table [in module %s]"),
11471 id
, dwp_file
->name
);
11473 if (ids_seen
[id
] != -1)
11475 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11476 " id %d in section table [in module %s]"),
11477 id
, dwp_file
->name
);
11482 /* Must have exactly one info or types section. */
11483 if (((ids_seen
[DW_SECT_INFO
] != -1)
11484 + (ids_seen
[DW_SECT_TYPES
] != -1))
11487 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11488 " DWO info/types section [in module %s]"),
11491 /* Must have an abbrev section. */
11492 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11494 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11495 " section [in module %s]"),
11498 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11499 htab
->section_pool
.v2
.sizes
=
11500 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11501 * nr_units
* nr_columns
);
11502 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11503 * nr_units
* nr_columns
))
11506 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11507 " [in module %s]"),
11515 /* Update SECTIONS with the data from SECTP.
11517 This function is like the other "locate" section routines that are
11518 passed to bfd_map_over_sections, but in this context the sections to
11519 read comes from the DWP V1 hash table, not the full ELF section table.
11521 The result is non-zero for success, or zero if an error was found. */
11524 locate_v1_virtual_dwo_sections (asection
*sectp
,
11525 struct virtual_v1_dwo_sections
*sections
)
11527 const struct dwop_section_names
*names
= &dwop_section_names
;
11529 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11531 /* There can be only one. */
11532 if (sections
->abbrev
.s
.section
!= NULL
)
11534 sections
->abbrev
.s
.section
= sectp
;
11535 sections
->abbrev
.size
= bfd_section_size (sectp
);
11537 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11538 || section_is_p (sectp
->name
, &names
->types_dwo
))
11540 /* There can be only one. */
11541 if (sections
->info_or_types
.s
.section
!= NULL
)
11543 sections
->info_or_types
.s
.section
= sectp
;
11544 sections
->info_or_types
.size
= bfd_section_size (sectp
);
11546 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11548 /* There can be only one. */
11549 if (sections
->line
.s
.section
!= NULL
)
11551 sections
->line
.s
.section
= sectp
;
11552 sections
->line
.size
= bfd_section_size (sectp
);
11554 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11556 /* There can be only one. */
11557 if (sections
->loc
.s
.section
!= NULL
)
11559 sections
->loc
.s
.section
= sectp
;
11560 sections
->loc
.size
= bfd_section_size (sectp
);
11562 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11564 /* There can be only one. */
11565 if (sections
->macinfo
.s
.section
!= NULL
)
11567 sections
->macinfo
.s
.section
= sectp
;
11568 sections
->macinfo
.size
= bfd_section_size (sectp
);
11570 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11572 /* There can be only one. */
11573 if (sections
->macro
.s
.section
!= NULL
)
11575 sections
->macro
.s
.section
= sectp
;
11576 sections
->macro
.size
= bfd_section_size (sectp
);
11578 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11580 /* There can be only one. */
11581 if (sections
->str_offsets
.s
.section
!= NULL
)
11583 sections
->str_offsets
.s
.section
= sectp
;
11584 sections
->str_offsets
.size
= bfd_section_size (sectp
);
11588 /* No other kind of section is valid. */
11595 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11596 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11597 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11598 This is for DWP version 1 files. */
11600 static struct dwo_unit
*
11601 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11602 struct dwp_file
*dwp_file
,
11603 uint32_t unit_index
,
11604 const char *comp_dir
,
11605 ULONGEST signature
, int is_debug_types
)
11607 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11608 const struct dwp_hash_table
*dwp_htab
=
11609 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11610 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11611 const char *kind
= is_debug_types
? "TU" : "CU";
11612 struct dwo_file
*dwo_file
;
11613 struct dwo_unit
*dwo_unit
;
11614 struct virtual_v1_dwo_sections sections
;
11615 void **dwo_file_slot
;
11618 gdb_assert (dwp_file
->version
== 1);
11620 if (dwarf_read_debug
)
11622 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
11624 pulongest (unit_index
), hex_string (signature
),
11628 /* Fetch the sections of this DWO unit.
11629 Put a limit on the number of sections we look for so that bad data
11630 doesn't cause us to loop forever. */
11632 #define MAX_NR_V1_DWO_SECTIONS \
11633 (1 /* .debug_info or .debug_types */ \
11634 + 1 /* .debug_abbrev */ \
11635 + 1 /* .debug_line */ \
11636 + 1 /* .debug_loc */ \
11637 + 1 /* .debug_str_offsets */ \
11638 + 1 /* .debug_macro or .debug_macinfo */ \
11639 + 1 /* trailing zero */)
11641 memset (§ions
, 0, sizeof (sections
));
11643 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
11646 uint32_t section_nr
=
11647 read_4_bytes (dbfd
,
11648 dwp_htab
->section_pool
.v1
.indices
11649 + (unit_index
+ i
) * sizeof (uint32_t));
11651 if (section_nr
== 0)
11653 if (section_nr
>= dwp_file
->num_sections
)
11655 error (_("Dwarf Error: bad DWP hash table, section number too large"
11656 " [in module %s]"),
11660 sectp
= dwp_file
->elf_sections
[section_nr
];
11661 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
11663 error (_("Dwarf Error: bad DWP hash table, invalid section found"
11664 " [in module %s]"),
11670 || sections
.info_or_types
.empty ()
11671 || sections
.abbrev
.empty ())
11673 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
11674 " [in module %s]"),
11677 if (i
== MAX_NR_V1_DWO_SECTIONS
)
11679 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
11680 " [in module %s]"),
11684 /* It's easier for the rest of the code if we fake a struct dwo_file and
11685 have dwo_unit "live" in that. At least for now.
11687 The DWP file can be made up of a random collection of CUs and TUs.
11688 However, for each CU + set of TUs that came from the same original DWO
11689 file, we can combine them back into a virtual DWO file to save space
11690 (fewer struct dwo_file objects to allocate). Remember that for really
11691 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11693 std::string virtual_dwo_name
=
11694 string_printf ("virtual-dwo/%d-%d-%d-%d",
11695 sections
.abbrev
.get_id (),
11696 sections
.line
.get_id (),
11697 sections
.loc
.get_id (),
11698 sections
.str_offsets
.get_id ());
11699 /* Can we use an existing virtual DWO file? */
11700 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11701 virtual_dwo_name
.c_str (),
11703 /* Create one if necessary. */
11704 if (*dwo_file_slot
== NULL
)
11706 if (dwarf_read_debug
)
11708 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11709 virtual_dwo_name
.c_str ());
11711 dwo_file
= new struct dwo_file
;
11712 dwo_file
->dwo_name
= objfile
->intern (virtual_dwo_name
);
11713 dwo_file
->comp_dir
= comp_dir
;
11714 dwo_file
->sections
.abbrev
= sections
.abbrev
;
11715 dwo_file
->sections
.line
= sections
.line
;
11716 dwo_file
->sections
.loc
= sections
.loc
;
11717 dwo_file
->sections
.macinfo
= sections
.macinfo
;
11718 dwo_file
->sections
.macro
= sections
.macro
;
11719 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
11720 /* The "str" section is global to the entire DWP file. */
11721 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11722 /* The info or types section is assigned below to dwo_unit,
11723 there's no need to record it in dwo_file.
11724 Also, we can't simply record type sections in dwo_file because
11725 we record a pointer into the vector in dwo_unit. As we collect more
11726 types we'll grow the vector and eventually have to reallocate space
11727 for it, invalidating all copies of pointers into the previous
11729 *dwo_file_slot
= dwo_file
;
11733 if (dwarf_read_debug
)
11735 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11736 virtual_dwo_name
.c_str ());
11738 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11741 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11742 dwo_unit
->dwo_file
= dwo_file
;
11743 dwo_unit
->signature
= signature
;
11744 dwo_unit
->section
=
11745 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11746 *dwo_unit
->section
= sections
.info_or_types
;
11747 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11752 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
11753 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
11754 piece within that section used by a TU/CU, return a virtual section
11755 of just that piece. */
11757 static struct dwarf2_section_info
11758 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11759 struct dwarf2_section_info
*section
,
11760 bfd_size_type offset
, bfd_size_type size
)
11762 struct dwarf2_section_info result
;
11765 gdb_assert (section
!= NULL
);
11766 gdb_assert (!section
->is_virtual
);
11768 memset (&result
, 0, sizeof (result
));
11769 result
.s
.containing_section
= section
;
11770 result
.is_virtual
= true;
11775 sectp
= section
->get_bfd_section ();
11777 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
11778 bounds of the real section. This is a pretty-rare event, so just
11779 flag an error (easier) instead of a warning and trying to cope. */
11781 || offset
+ size
> bfd_section_size (sectp
))
11783 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
11784 " in section %s [in module %s]"),
11785 sectp
? bfd_section_name (sectp
) : "<unknown>",
11786 objfile_name (dwarf2_per_objfile
->objfile
));
11789 result
.virtual_offset
= offset
;
11790 result
.size
= size
;
11794 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11795 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11796 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11797 This is for DWP version 2 files. */
11799 static struct dwo_unit
*
11800 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11801 struct dwp_file
*dwp_file
,
11802 uint32_t unit_index
,
11803 const char *comp_dir
,
11804 ULONGEST signature
, int is_debug_types
)
11806 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11807 const struct dwp_hash_table
*dwp_htab
=
11808 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11809 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11810 const char *kind
= is_debug_types
? "TU" : "CU";
11811 struct dwo_file
*dwo_file
;
11812 struct dwo_unit
*dwo_unit
;
11813 struct virtual_v2_dwo_sections sections
;
11814 void **dwo_file_slot
;
11817 gdb_assert (dwp_file
->version
== 2);
11819 if (dwarf_read_debug
)
11821 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
11823 pulongest (unit_index
), hex_string (signature
),
11827 /* Fetch the section offsets of this DWO unit. */
11829 memset (§ions
, 0, sizeof (sections
));
11831 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
11833 uint32_t offset
= read_4_bytes (dbfd
,
11834 dwp_htab
->section_pool
.v2
.offsets
11835 + (((unit_index
- 1) * dwp_htab
->nr_columns
11837 * sizeof (uint32_t)));
11838 uint32_t size
= read_4_bytes (dbfd
,
11839 dwp_htab
->section_pool
.v2
.sizes
11840 + (((unit_index
- 1) * dwp_htab
->nr_columns
11842 * sizeof (uint32_t)));
11844 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
11847 case DW_SECT_TYPES
:
11848 sections
.info_or_types_offset
= offset
;
11849 sections
.info_or_types_size
= size
;
11851 case DW_SECT_ABBREV
:
11852 sections
.abbrev_offset
= offset
;
11853 sections
.abbrev_size
= size
;
11856 sections
.line_offset
= offset
;
11857 sections
.line_size
= size
;
11860 sections
.loc_offset
= offset
;
11861 sections
.loc_size
= size
;
11863 case DW_SECT_STR_OFFSETS
:
11864 sections
.str_offsets_offset
= offset
;
11865 sections
.str_offsets_size
= size
;
11867 case DW_SECT_MACINFO
:
11868 sections
.macinfo_offset
= offset
;
11869 sections
.macinfo_size
= size
;
11871 case DW_SECT_MACRO
:
11872 sections
.macro_offset
= offset
;
11873 sections
.macro_size
= size
;
11878 /* It's easier for the rest of the code if we fake a struct dwo_file and
11879 have dwo_unit "live" in that. At least for now.
11881 The DWP file can be made up of a random collection of CUs and TUs.
11882 However, for each CU + set of TUs that came from the same original DWO
11883 file, we can combine them back into a virtual DWO file to save space
11884 (fewer struct dwo_file objects to allocate). Remember that for really
11885 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11887 std::string virtual_dwo_name
=
11888 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
11889 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
11890 (long) (sections
.line_size
? sections
.line_offset
: 0),
11891 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
11892 (long) (sections
.str_offsets_size
11893 ? sections
.str_offsets_offset
: 0));
11894 /* Can we use an existing virtual DWO file? */
11895 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11896 virtual_dwo_name
.c_str (),
11898 /* Create one if necessary. */
11899 if (*dwo_file_slot
== NULL
)
11901 if (dwarf_read_debug
)
11903 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11904 virtual_dwo_name
.c_str ());
11906 dwo_file
= new struct dwo_file
;
11907 dwo_file
->dwo_name
= objfile
->intern (virtual_dwo_name
);
11908 dwo_file
->comp_dir
= comp_dir
;
11909 dwo_file
->sections
.abbrev
=
11910 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
11911 sections
.abbrev_offset
, sections
.abbrev_size
);
11912 dwo_file
->sections
.line
=
11913 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
11914 sections
.line_offset
, sections
.line_size
);
11915 dwo_file
->sections
.loc
=
11916 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
11917 sections
.loc_offset
, sections
.loc_size
);
11918 dwo_file
->sections
.macinfo
=
11919 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
11920 sections
.macinfo_offset
, sections
.macinfo_size
);
11921 dwo_file
->sections
.macro
=
11922 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
11923 sections
.macro_offset
, sections
.macro_size
);
11924 dwo_file
->sections
.str_offsets
=
11925 create_dwp_v2_section (dwarf2_per_objfile
,
11926 &dwp_file
->sections
.str_offsets
,
11927 sections
.str_offsets_offset
,
11928 sections
.str_offsets_size
);
11929 /* The "str" section is global to the entire DWP file. */
11930 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11931 /* The info or types section is assigned below to dwo_unit,
11932 there's no need to record it in dwo_file.
11933 Also, we can't simply record type sections in dwo_file because
11934 we record a pointer into the vector in dwo_unit. As we collect more
11935 types we'll grow the vector and eventually have to reallocate space
11936 for it, invalidating all copies of pointers into the previous
11938 *dwo_file_slot
= dwo_file
;
11942 if (dwarf_read_debug
)
11944 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11945 virtual_dwo_name
.c_str ());
11947 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11950 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11951 dwo_unit
->dwo_file
= dwo_file
;
11952 dwo_unit
->signature
= signature
;
11953 dwo_unit
->section
=
11954 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11955 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
11957 ? &dwp_file
->sections
.types
11958 : &dwp_file
->sections
.info
,
11959 sections
.info_or_types_offset
,
11960 sections
.info_or_types_size
);
11961 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11966 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
11967 Returns NULL if the signature isn't found. */
11969 static struct dwo_unit
*
11970 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11971 struct dwp_file
*dwp_file
, const char *comp_dir
,
11972 ULONGEST signature
, int is_debug_types
)
11974 const struct dwp_hash_table
*dwp_htab
=
11975 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11976 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11977 uint32_t mask
= dwp_htab
->nr_slots
- 1;
11978 uint32_t hash
= signature
& mask
;
11979 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
11982 struct dwo_unit find_dwo_cu
;
11984 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
11985 find_dwo_cu
.signature
= signature
;
11986 slot
= htab_find_slot (is_debug_types
11987 ? dwp_file
->loaded_tus
.get ()
11988 : dwp_file
->loaded_cus
.get (),
11989 &find_dwo_cu
, INSERT
);
11992 return (struct dwo_unit
*) *slot
;
11994 /* Use a for loop so that we don't loop forever on bad debug info. */
11995 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
11997 ULONGEST signature_in_table
;
11999 signature_in_table
=
12000 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12001 if (signature_in_table
== signature
)
12003 uint32_t unit_index
=
12004 read_4_bytes (dbfd
,
12005 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12007 if (dwp_file
->version
== 1)
12009 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12010 dwp_file
, unit_index
,
12011 comp_dir
, signature
,
12016 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12017 dwp_file
, unit_index
,
12018 comp_dir
, signature
,
12021 return (struct dwo_unit
*) *slot
;
12023 if (signature_in_table
== 0)
12025 hash
= (hash
+ hash2
) & mask
;
12028 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12029 " [in module %s]"),
12033 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12034 Open the file specified by FILE_NAME and hand it off to BFD for
12035 preliminary analysis. Return a newly initialized bfd *, which
12036 includes a canonicalized copy of FILE_NAME.
12037 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12038 SEARCH_CWD is true if the current directory is to be searched.
12039 It will be searched before debug-file-directory.
12040 If successful, the file is added to the bfd include table of the
12041 objfile's bfd (see gdb_bfd_record_inclusion).
12042 If unable to find/open the file, return NULL.
12043 NOTE: This function is derived from symfile_bfd_open. */
12045 static gdb_bfd_ref_ptr
12046 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12047 const char *file_name
, int is_dwp
, int search_cwd
)
12050 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12051 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12052 to debug_file_directory. */
12053 const char *search_path
;
12054 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12056 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12059 if (*debug_file_directory
!= '\0')
12061 search_path_holder
.reset (concat (".", dirname_separator_string
,
12062 debug_file_directory
,
12064 search_path
= search_path_holder
.get ();
12070 search_path
= debug_file_directory
;
12072 openp_flags flags
= OPF_RETURN_REALPATH
;
12074 flags
|= OPF_SEARCH_IN_PATH
;
12076 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12077 desc
= openp (search_path
, flags
, file_name
,
12078 O_RDONLY
| O_BINARY
, &absolute_name
);
12082 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12084 if (sym_bfd
== NULL
)
12086 bfd_set_cacheable (sym_bfd
.get (), 1);
12088 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12091 /* Success. Record the bfd as having been included by the objfile's bfd.
12092 This is important because things like demangled_names_hash lives in the
12093 objfile's per_bfd space and may have references to things like symbol
12094 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12095 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12100 /* Try to open DWO file FILE_NAME.
12101 COMP_DIR is the DW_AT_comp_dir attribute.
12102 The result is the bfd handle of the file.
12103 If there is a problem finding or opening the file, return NULL.
12104 Upon success, the canonicalized path of the file is stored in the bfd,
12105 same as symfile_bfd_open. */
12107 static gdb_bfd_ref_ptr
12108 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12109 const char *file_name
, const char *comp_dir
)
12111 if (IS_ABSOLUTE_PATH (file_name
))
12112 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12113 0 /*is_dwp*/, 0 /*search_cwd*/);
12115 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12117 if (comp_dir
!= NULL
)
12119 gdb::unique_xmalloc_ptr
<char> path_to_try
12120 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12122 /* NOTE: If comp_dir is a relative path, this will also try the
12123 search path, which seems useful. */
12124 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12125 path_to_try
.get (),
12127 1 /*search_cwd*/));
12132 /* That didn't work, try debug-file-directory, which, despite its name,
12133 is a list of paths. */
12135 if (*debug_file_directory
== '\0')
12138 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12139 0 /*is_dwp*/, 1 /*search_cwd*/);
12142 /* This function is mapped across the sections and remembers the offset and
12143 size of each of the DWO debugging sections we are interested in. */
12146 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12148 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12149 const struct dwop_section_names
*names
= &dwop_section_names
;
12151 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12153 dwo_sections
->abbrev
.s
.section
= sectp
;
12154 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12156 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12158 dwo_sections
->info
.s
.section
= sectp
;
12159 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12161 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12163 dwo_sections
->line
.s
.section
= sectp
;
12164 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12166 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12168 dwo_sections
->loc
.s
.section
= sectp
;
12169 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12171 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12173 dwo_sections
->loclists
.s
.section
= sectp
;
12174 dwo_sections
->loclists
.size
= bfd_section_size (sectp
);
12176 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12178 dwo_sections
->macinfo
.s
.section
= sectp
;
12179 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12181 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12183 dwo_sections
->macro
.s
.section
= sectp
;
12184 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12186 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12188 dwo_sections
->str
.s
.section
= sectp
;
12189 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12191 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12193 dwo_sections
->str_offsets
.s
.section
= sectp
;
12194 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12196 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12198 struct dwarf2_section_info type_section
;
12200 memset (&type_section
, 0, sizeof (type_section
));
12201 type_section
.s
.section
= sectp
;
12202 type_section
.size
= bfd_section_size (sectp
);
12203 dwo_sections
->types
.push_back (type_section
);
12207 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12208 by PER_CU. This is for the non-DWP case.
12209 The result is NULL if DWO_NAME can't be found. */
12211 static struct dwo_file
*
12212 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12213 const char *dwo_name
, const char *comp_dir
)
12215 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12217 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12220 if (dwarf_read_debug
)
12221 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12225 dwo_file_up
dwo_file (new struct dwo_file
);
12226 dwo_file
->dwo_name
= dwo_name
;
12227 dwo_file
->comp_dir
= comp_dir
;
12228 dwo_file
->dbfd
= std::move (dbfd
);
12230 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12231 &dwo_file
->sections
);
12233 create_cus_hash_table (dwarf2_per_objfile
, per_cu
->cu
, *dwo_file
,
12234 dwo_file
->sections
.info
, dwo_file
->cus
);
12236 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12237 dwo_file
->sections
.types
, dwo_file
->tus
);
12239 if (dwarf_read_debug
)
12240 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12242 return dwo_file
.release ();
12245 /* This function is mapped across the sections and remembers the offset and
12246 size of each of the DWP debugging sections common to version 1 and 2 that
12247 we are interested in. */
12250 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12251 void *dwp_file_ptr
)
12253 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12254 const struct dwop_section_names
*names
= &dwop_section_names
;
12255 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12257 /* Record the ELF section number for later lookup: this is what the
12258 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12259 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12260 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12262 /* Look for specific sections that we need. */
12263 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12265 dwp_file
->sections
.str
.s
.section
= sectp
;
12266 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12268 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12270 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12271 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12273 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12275 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12276 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12280 /* This function is mapped across the sections and remembers the offset and
12281 size of each of the DWP version 2 debugging sections that we are interested
12282 in. This is split into a separate function because we don't know if we
12283 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12286 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12288 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12289 const struct dwop_section_names
*names
= &dwop_section_names
;
12290 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12292 /* Record the ELF section number for later lookup: this is what the
12293 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12294 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12295 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12297 /* Look for specific sections that we need. */
12298 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12300 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12301 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12303 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12305 dwp_file
->sections
.info
.s
.section
= sectp
;
12306 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12308 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12310 dwp_file
->sections
.line
.s
.section
= sectp
;
12311 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12313 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12315 dwp_file
->sections
.loc
.s
.section
= sectp
;
12316 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12318 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12320 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12321 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12323 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12325 dwp_file
->sections
.macro
.s
.section
= sectp
;
12326 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12328 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12330 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12331 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12333 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12335 dwp_file
->sections
.types
.s
.section
= sectp
;
12336 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
12340 /* Hash function for dwp_file loaded CUs/TUs. */
12343 hash_dwp_loaded_cutus (const void *item
)
12345 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
12347 /* This drops the top 32 bits of the signature, but is ok for a hash. */
12348 return dwo_unit
->signature
;
12351 /* Equality function for dwp_file loaded CUs/TUs. */
12354 eq_dwp_loaded_cutus (const void *a
, const void *b
)
12356 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
12357 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
12359 return dua
->signature
== dub
->signature
;
12362 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
12365 allocate_dwp_loaded_cutus_table ()
12367 return htab_up (htab_create_alloc (3,
12368 hash_dwp_loaded_cutus
,
12369 eq_dwp_loaded_cutus
,
12370 NULL
, xcalloc
, xfree
));
12373 /* Try to open DWP file FILE_NAME.
12374 The result is the bfd handle of the file.
12375 If there is a problem finding or opening the file, return NULL.
12376 Upon success, the canonicalized path of the file is stored in the bfd,
12377 same as symfile_bfd_open. */
12379 static gdb_bfd_ref_ptr
12380 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12381 const char *file_name
)
12383 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12385 1 /*search_cwd*/));
12389 /* Work around upstream bug 15652.
12390 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
12391 [Whether that's a "bug" is debatable, but it is getting in our way.]
12392 We have no real idea where the dwp file is, because gdb's realpath-ing
12393 of the executable's path may have discarded the needed info.
12394 [IWBN if the dwp file name was recorded in the executable, akin to
12395 .gnu_debuglink, but that doesn't exist yet.]
12396 Strip the directory from FILE_NAME and search again. */
12397 if (*debug_file_directory
!= '\0')
12399 /* Don't implicitly search the current directory here.
12400 If the user wants to search "." to handle this case,
12401 it must be added to debug-file-directory. */
12402 return try_open_dwop_file (dwarf2_per_objfile
,
12403 lbasename (file_name
), 1 /*is_dwp*/,
12410 /* Initialize the use of the DWP file for the current objfile.
12411 By convention the name of the DWP file is ${objfile}.dwp.
12412 The result is NULL if it can't be found. */
12414 static std::unique_ptr
<struct dwp_file
>
12415 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12417 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12419 /* Try to find first .dwp for the binary file before any symbolic links
12422 /* If the objfile is a debug file, find the name of the real binary
12423 file and get the name of dwp file from there. */
12424 std::string dwp_name
;
12425 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
12427 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
12428 const char *backlink_basename
= lbasename (backlink
->original_name
);
12430 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
12433 dwp_name
= objfile
->original_name
;
12435 dwp_name
+= ".dwp";
12437 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
12439 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
12441 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
12442 dwp_name
= objfile_name (objfile
);
12443 dwp_name
+= ".dwp";
12444 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
12449 if (dwarf_read_debug
)
12450 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
12451 return std::unique_ptr
<dwp_file
> ();
12454 const char *name
= bfd_get_filename (dbfd
.get ());
12455 std::unique_ptr
<struct dwp_file
> dwp_file
12456 (new struct dwp_file (name
, std::move (dbfd
)));
12458 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
12459 dwp_file
->elf_sections
=
12460 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
12461 dwp_file
->num_sections
, asection
*);
12463 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12464 dwarf2_locate_common_dwp_sections
,
12467 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12470 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12473 /* The DWP file version is stored in the hash table. Oh well. */
12474 if (dwp_file
->cus
&& dwp_file
->tus
12475 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
12477 /* Technically speaking, we should try to limp along, but this is
12478 pretty bizarre. We use pulongest here because that's the established
12479 portability solution (e.g, we cannot use %u for uint32_t). */
12480 error (_("Dwarf Error: DWP file CU version %s doesn't match"
12481 " TU version %s [in DWP file %s]"),
12482 pulongest (dwp_file
->cus
->version
),
12483 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12487 dwp_file
->version
= dwp_file
->cus
->version
;
12488 else if (dwp_file
->tus
)
12489 dwp_file
->version
= dwp_file
->tus
->version
;
12491 dwp_file
->version
= 2;
12493 if (dwp_file
->version
== 2)
12494 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12495 dwarf2_locate_v2_dwp_sections
,
12498 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table ();
12499 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table ();
12501 if (dwarf_read_debug
)
12503 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12504 fprintf_unfiltered (gdb_stdlog
,
12505 " %s CUs, %s TUs\n",
12506 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12507 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12513 /* Wrapper around open_and_init_dwp_file, only open it once. */
12515 static struct dwp_file
*
12516 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12518 if (! dwarf2_per_objfile
->dwp_checked
)
12520 dwarf2_per_objfile
->dwp_file
12521 = open_and_init_dwp_file (dwarf2_per_objfile
);
12522 dwarf2_per_objfile
->dwp_checked
= 1;
12524 return dwarf2_per_objfile
->dwp_file
.get ();
12527 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12528 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12529 or in the DWP file for the objfile, referenced by THIS_UNIT.
12530 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12531 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12533 This is called, for example, when wanting to read a variable with a
12534 complex location. Therefore we don't want to do file i/o for every call.
12535 Therefore we don't want to look for a DWO file on every call.
12536 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12537 then we check if we've already seen DWO_NAME, and only THEN do we check
12540 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12541 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12543 static struct dwo_unit
*
12544 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
12545 const char *dwo_name
, const char *comp_dir
,
12546 ULONGEST signature
, int is_debug_types
)
12548 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
12549 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12550 const char *kind
= is_debug_types
? "TU" : "CU";
12551 void **dwo_file_slot
;
12552 struct dwo_file
*dwo_file
;
12553 struct dwp_file
*dwp_file
;
12555 /* First see if there's a DWP file.
12556 If we have a DWP file but didn't find the DWO inside it, don't
12557 look for the original DWO file. It makes gdb behave differently
12558 depending on whether one is debugging in the build tree. */
12560 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
12561 if (dwp_file
!= NULL
)
12563 const struct dwp_hash_table
*dwp_htab
=
12564 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12566 if (dwp_htab
!= NULL
)
12568 struct dwo_unit
*dwo_cutu
=
12569 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
12570 signature
, is_debug_types
);
12572 if (dwo_cutu
!= NULL
)
12574 if (dwarf_read_debug
)
12576 fprintf_unfiltered (gdb_stdlog
,
12577 "Virtual DWO %s %s found: @%s\n",
12578 kind
, hex_string (signature
),
12579 host_address_to_string (dwo_cutu
));
12587 /* No DWP file, look for the DWO file. */
12589 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12590 dwo_name
, comp_dir
);
12591 if (*dwo_file_slot
== NULL
)
12593 /* Read in the file and build a table of the CUs/TUs it contains. */
12594 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
12596 /* NOTE: This will be NULL if unable to open the file. */
12597 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12599 if (dwo_file
!= NULL
)
12601 struct dwo_unit
*dwo_cutu
= NULL
;
12603 if (is_debug_types
&& dwo_file
->tus
)
12605 struct dwo_unit find_dwo_cutu
;
12607 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12608 find_dwo_cutu
.signature
= signature
;
12610 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
12613 else if (!is_debug_types
&& dwo_file
->cus
)
12615 struct dwo_unit find_dwo_cutu
;
12617 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12618 find_dwo_cutu
.signature
= signature
;
12619 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
12623 if (dwo_cutu
!= NULL
)
12625 if (dwarf_read_debug
)
12627 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
12628 kind
, dwo_name
, hex_string (signature
),
12629 host_address_to_string (dwo_cutu
));
12636 /* We didn't find it. This could mean a dwo_id mismatch, or
12637 someone deleted the DWO/DWP file, or the search path isn't set up
12638 correctly to find the file. */
12640 if (dwarf_read_debug
)
12642 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
12643 kind
, dwo_name
, hex_string (signature
));
12646 /* This is a warning and not a complaint because it can be caused by
12647 pilot error (e.g., user accidentally deleting the DWO). */
12649 /* Print the name of the DWP file if we looked there, helps the user
12650 better diagnose the problem. */
12651 std::string dwp_text
;
12653 if (dwp_file
!= NULL
)
12654 dwp_text
= string_printf (" [in DWP file %s]",
12655 lbasename (dwp_file
->name
));
12657 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
12658 " [in module %s]"),
12659 kind
, dwo_name
, hex_string (signature
),
12661 this_unit
->is_debug_types
? "TU" : "CU",
12662 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
12667 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
12668 See lookup_dwo_cutu_unit for details. */
12670 static struct dwo_unit
*
12671 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
12672 const char *dwo_name
, const char *comp_dir
,
12673 ULONGEST signature
)
12675 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
12678 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
12679 See lookup_dwo_cutu_unit for details. */
12681 static struct dwo_unit
*
12682 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
12683 const char *dwo_name
, const char *comp_dir
)
12685 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
12688 /* Traversal function for queue_and_load_all_dwo_tus. */
12691 queue_and_load_dwo_tu (void **slot
, void *info
)
12693 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
12694 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
12695 ULONGEST signature
= dwo_unit
->signature
;
12696 struct signatured_type
*sig_type
=
12697 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
12699 if (sig_type
!= NULL
)
12701 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
12703 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
12704 a real dependency of PER_CU on SIG_TYPE. That is detected later
12705 while processing PER_CU. */
12706 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
12707 load_full_type_unit (sig_cu
);
12708 per_cu
->imported_symtabs_push (sig_cu
);
12714 /* Queue all TUs contained in the DWO of PER_CU to be read in.
12715 The DWO may have the only definition of the type, though it may not be
12716 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
12717 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
12720 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
12722 struct dwo_unit
*dwo_unit
;
12723 struct dwo_file
*dwo_file
;
12725 gdb_assert (!per_cu
->is_debug_types
);
12726 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
12727 gdb_assert (per_cu
->cu
!= NULL
);
12729 dwo_unit
= per_cu
->cu
->dwo_unit
;
12730 gdb_assert (dwo_unit
!= NULL
);
12732 dwo_file
= dwo_unit
->dwo_file
;
12733 if (dwo_file
->tus
!= NULL
)
12734 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
,
12738 /* Read in various DIEs. */
12740 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
12741 Inherit only the children of the DW_AT_abstract_origin DIE not being
12742 already referenced by DW_AT_abstract_origin from the children of the
12746 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
12748 struct die_info
*child_die
;
12749 sect_offset
*offsetp
;
12750 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
12751 struct die_info
*origin_die
;
12752 /* Iterator of the ORIGIN_DIE children. */
12753 struct die_info
*origin_child_die
;
12754 struct attribute
*attr
;
12755 struct dwarf2_cu
*origin_cu
;
12756 struct pending
**origin_previous_list_in_scope
;
12758 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12762 /* Note that following die references may follow to a die in a
12766 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
12768 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
12770 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
12771 origin_cu
->list_in_scope
= cu
->list_in_scope
;
12773 if (die
->tag
!= origin_die
->tag
12774 && !(die
->tag
== DW_TAG_inlined_subroutine
12775 && origin_die
->tag
== DW_TAG_subprogram
))
12776 complaint (_("DIE %s and its abstract origin %s have different tags"),
12777 sect_offset_str (die
->sect_off
),
12778 sect_offset_str (origin_die
->sect_off
));
12780 std::vector
<sect_offset
> offsets
;
12782 for (child_die
= die
->child
;
12783 child_die
&& child_die
->tag
;
12784 child_die
= child_die
->sibling
)
12786 struct die_info
*child_origin_die
;
12787 struct dwarf2_cu
*child_origin_cu
;
12789 /* We are trying to process concrete instance entries:
12790 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
12791 it's not relevant to our analysis here. i.e. detecting DIEs that are
12792 present in the abstract instance but not referenced in the concrete
12794 if (child_die
->tag
== DW_TAG_call_site
12795 || child_die
->tag
== DW_TAG_GNU_call_site
)
12798 /* For each CHILD_DIE, find the corresponding child of
12799 ORIGIN_DIE. If there is more than one layer of
12800 DW_AT_abstract_origin, follow them all; there shouldn't be,
12801 but GCC versions at least through 4.4 generate this (GCC PR
12803 child_origin_die
= child_die
;
12804 child_origin_cu
= cu
;
12807 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
12811 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
12815 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
12816 counterpart may exist. */
12817 if (child_origin_die
!= child_die
)
12819 if (child_die
->tag
!= child_origin_die
->tag
12820 && !(child_die
->tag
== DW_TAG_inlined_subroutine
12821 && child_origin_die
->tag
== DW_TAG_subprogram
))
12822 complaint (_("Child DIE %s and its abstract origin %s have "
12824 sect_offset_str (child_die
->sect_off
),
12825 sect_offset_str (child_origin_die
->sect_off
));
12826 if (child_origin_die
->parent
!= origin_die
)
12827 complaint (_("Child DIE %s and its abstract origin %s have "
12828 "different parents"),
12829 sect_offset_str (child_die
->sect_off
),
12830 sect_offset_str (child_origin_die
->sect_off
));
12832 offsets
.push_back (child_origin_die
->sect_off
);
12835 std::sort (offsets
.begin (), offsets
.end ());
12836 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
12837 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
12838 if (offsetp
[-1] == *offsetp
)
12839 complaint (_("Multiple children of DIE %s refer "
12840 "to DIE %s as their abstract origin"),
12841 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
12843 offsetp
= offsets
.data ();
12844 origin_child_die
= origin_die
->child
;
12845 while (origin_child_die
&& origin_child_die
->tag
)
12847 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
12848 while (offsetp
< offsets_end
12849 && *offsetp
< origin_child_die
->sect_off
)
12851 if (offsetp
>= offsets_end
12852 || *offsetp
> origin_child_die
->sect_off
)
12854 /* Found that ORIGIN_CHILD_DIE is really not referenced.
12855 Check whether we're already processing ORIGIN_CHILD_DIE.
12856 This can happen with mutually referenced abstract_origins.
12858 if (!origin_child_die
->in_process
)
12859 process_die (origin_child_die
, origin_cu
);
12861 origin_child_die
= origin_child_die
->sibling
;
12863 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
12865 if (cu
!= origin_cu
)
12866 compute_delayed_physnames (origin_cu
);
12870 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12872 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
12873 struct gdbarch
*gdbarch
= objfile
->arch ();
12874 struct context_stack
*newobj
;
12877 struct die_info
*child_die
;
12878 struct attribute
*attr
, *call_line
, *call_file
;
12880 CORE_ADDR baseaddr
;
12881 struct block
*block
;
12882 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
12883 std::vector
<struct symbol
*> template_args
;
12884 struct template_symbol
*templ_func
= NULL
;
12888 /* If we do not have call site information, we can't show the
12889 caller of this inlined function. That's too confusing, so
12890 only use the scope for local variables. */
12891 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
12892 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
12893 if (call_line
== NULL
|| call_file
== NULL
)
12895 read_lexical_block_scope (die
, cu
);
12900 baseaddr
= objfile
->text_section_offset ();
12902 name
= dwarf2_name (die
, cu
);
12904 /* Ignore functions with missing or empty names. These are actually
12905 illegal according to the DWARF standard. */
12908 complaint (_("missing name for subprogram DIE at %s"),
12909 sect_offset_str (die
->sect_off
));
12913 /* Ignore functions with missing or invalid low and high pc attributes. */
12914 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
12915 <= PC_BOUNDS_INVALID
)
12917 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
12918 if (!attr
|| !DW_UNSND (attr
))
12919 complaint (_("cannot get low and high bounds "
12920 "for subprogram DIE at %s"),
12921 sect_offset_str (die
->sect_off
));
12925 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12926 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
12928 /* If we have any template arguments, then we must allocate a
12929 different sort of symbol. */
12930 for (child_die
= die
->child
; child_die
; child_die
= child_die
->sibling
)
12932 if (child_die
->tag
== DW_TAG_template_type_param
12933 || child_die
->tag
== DW_TAG_template_value_param
)
12935 templ_func
= allocate_template_symbol (objfile
);
12936 templ_func
->subclass
= SYMBOL_TEMPLATE
;
12941 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
12942 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
12943 (struct symbol
*) templ_func
);
12945 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
12946 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
12949 /* If there is a location expression for DW_AT_frame_base, record
12951 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
12952 if (attr
!= nullptr)
12953 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
12955 /* If there is a location for the static link, record it. */
12956 newobj
->static_link
= NULL
;
12957 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
12958 if (attr
!= nullptr)
12960 newobj
->static_link
12961 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
12962 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
12963 cu
->per_cu
->addr_type ());
12966 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
12968 if (die
->child
!= NULL
)
12970 child_die
= die
->child
;
12971 while (child_die
&& child_die
->tag
)
12973 if (child_die
->tag
== DW_TAG_template_type_param
12974 || child_die
->tag
== DW_TAG_template_value_param
)
12976 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
12979 template_args
.push_back (arg
);
12982 process_die (child_die
, cu
);
12983 child_die
= child_die
->sibling
;
12987 inherit_abstract_dies (die
, cu
);
12989 /* If we have a DW_AT_specification, we might need to import using
12990 directives from the context of the specification DIE. See the
12991 comment in determine_prefix. */
12992 if (cu
->language
== language_cplus
12993 && dwarf2_attr (die
, DW_AT_specification
, cu
))
12995 struct dwarf2_cu
*spec_cu
= cu
;
12996 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13000 child_die
= spec_die
->child
;
13001 while (child_die
&& child_die
->tag
)
13003 if (child_die
->tag
== DW_TAG_imported_module
)
13004 process_die (child_die
, spec_cu
);
13005 child_die
= child_die
->sibling
;
13008 /* In some cases, GCC generates specification DIEs that
13009 themselves contain DW_AT_specification attributes. */
13010 spec_die
= die_specification (spec_die
, &spec_cu
);
13014 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13015 /* Make a block for the local symbols within. */
13016 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13017 cstk
.static_link
, lowpc
, highpc
);
13019 /* For C++, set the block's scope. */
13020 if ((cu
->language
== language_cplus
13021 || cu
->language
== language_fortran
13022 || cu
->language
== language_d
13023 || cu
->language
== language_rust
)
13024 && cu
->processing_has_namespace_info
)
13025 block_set_scope (block
, determine_prefix (die
, cu
),
13026 &objfile
->objfile_obstack
);
13028 /* If we have address ranges, record them. */
13029 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13031 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13033 /* Attach template arguments to function. */
13034 if (!template_args
.empty ())
13036 gdb_assert (templ_func
!= NULL
);
13038 templ_func
->n_template_arguments
= template_args
.size ();
13039 templ_func
->template_arguments
13040 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13041 templ_func
->n_template_arguments
);
13042 memcpy (templ_func
->template_arguments
,
13043 template_args
.data (),
13044 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13046 /* Make sure that the symtab is set on the new symbols. Even
13047 though they don't appear in this symtab directly, other parts
13048 of gdb assume that symbols do, and this is reasonably
13050 for (symbol
*sym
: template_args
)
13051 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13054 /* In C++, we can have functions nested inside functions (e.g., when
13055 a function declares a class that has methods). This means that
13056 when we finish processing a function scope, we may need to go
13057 back to building a containing block's symbol lists. */
13058 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13059 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13061 /* If we've finished processing a top-level function, subsequent
13062 symbols go in the file symbol list. */
13063 if (cu
->get_builder ()->outermost_context_p ())
13064 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13067 /* Process all the DIES contained within a lexical block scope. Start
13068 a new scope, process the dies, and then close the scope. */
13071 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13073 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13074 struct gdbarch
*gdbarch
= objfile
->arch ();
13075 CORE_ADDR lowpc
, highpc
;
13076 struct die_info
*child_die
;
13077 CORE_ADDR baseaddr
;
13079 baseaddr
= objfile
->text_section_offset ();
13081 /* Ignore blocks with missing or invalid low and high pc attributes. */
13082 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13083 as multiple lexical blocks? Handling children in a sane way would
13084 be nasty. Might be easier to properly extend generic blocks to
13085 describe ranges. */
13086 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13088 case PC_BOUNDS_NOT_PRESENT
:
13089 /* DW_TAG_lexical_block has no attributes, process its children as if
13090 there was no wrapping by that DW_TAG_lexical_block.
13091 GCC does no longer produces such DWARF since GCC r224161. */
13092 for (child_die
= die
->child
;
13093 child_die
!= NULL
&& child_die
->tag
;
13094 child_die
= child_die
->sibling
)
13095 process_die (child_die
, cu
);
13097 case PC_BOUNDS_INVALID
:
13100 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13101 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13103 cu
->get_builder ()->push_context (0, lowpc
);
13104 if (die
->child
!= NULL
)
13106 child_die
= die
->child
;
13107 while (child_die
&& child_die
->tag
)
13109 process_die (child_die
, cu
);
13110 child_die
= child_die
->sibling
;
13113 inherit_abstract_dies (die
, cu
);
13114 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13116 if (*cu
->get_builder ()->get_local_symbols () != NULL
13117 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13119 struct block
*block
13120 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13121 cstk
.start_addr
, highpc
);
13123 /* Note that recording ranges after traversing children, as we
13124 do here, means that recording a parent's ranges entails
13125 walking across all its children's ranges as they appear in
13126 the address map, which is quadratic behavior.
13128 It would be nicer to record the parent's ranges before
13129 traversing its children, simply overriding whatever you find
13130 there. But since we don't even decide whether to create a
13131 block until after we've traversed its children, that's hard
13133 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13135 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13136 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13139 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13142 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13144 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13145 struct gdbarch
*gdbarch
= objfile
->arch ();
13146 CORE_ADDR pc
, baseaddr
;
13147 struct attribute
*attr
;
13148 struct call_site
*call_site
, call_site_local
;
13151 struct die_info
*child_die
;
13153 baseaddr
= objfile
->text_section_offset ();
13155 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13158 /* This was a pre-DWARF-5 GNU extension alias
13159 for DW_AT_call_return_pc. */
13160 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13164 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13165 "DIE %s [in module %s]"),
13166 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13169 pc
= attr
->value_as_address () + baseaddr
;
13170 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13172 if (cu
->call_site_htab
== NULL
)
13173 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13174 NULL
, &objfile
->objfile_obstack
,
13175 hashtab_obstack_allocate
, NULL
);
13176 call_site_local
.pc
= pc
;
13177 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13180 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13181 "DIE %s [in module %s]"),
13182 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13183 objfile_name (objfile
));
13187 /* Count parameters at the caller. */
13190 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13191 child_die
= child_die
->sibling
)
13193 if (child_die
->tag
!= DW_TAG_call_site_parameter
13194 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13196 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13197 "DW_TAG_call_site child DIE %s [in module %s]"),
13198 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13199 objfile_name (objfile
));
13207 = ((struct call_site
*)
13208 obstack_alloc (&objfile
->objfile_obstack
,
13209 sizeof (*call_site
)
13210 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13212 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13213 call_site
->pc
= pc
;
13215 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13216 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13218 struct die_info
*func_die
;
13220 /* Skip also over DW_TAG_inlined_subroutine. */
13221 for (func_die
= die
->parent
;
13222 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13223 && func_die
->tag
!= DW_TAG_subroutine_type
;
13224 func_die
= func_die
->parent
);
13226 /* DW_AT_call_all_calls is a superset
13227 of DW_AT_call_all_tail_calls. */
13229 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13230 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13231 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13232 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13234 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13235 not complete. But keep CALL_SITE for look ups via call_site_htab,
13236 both the initial caller containing the real return address PC and
13237 the final callee containing the current PC of a chain of tail
13238 calls do not need to have the tail call list complete. But any
13239 function candidate for a virtual tail call frame searched via
13240 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13241 determined unambiguously. */
13245 struct type
*func_type
= NULL
;
13248 func_type
= get_die_type (func_die
, cu
);
13249 if (func_type
!= NULL
)
13251 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13253 /* Enlist this call site to the function. */
13254 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13255 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13258 complaint (_("Cannot find function owning DW_TAG_call_site "
13259 "DIE %s [in module %s]"),
13260 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13264 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13266 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13268 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13271 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13272 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13274 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13275 if (!attr
|| (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0))
13276 /* Keep NULL DWARF_BLOCK. */;
13277 else if (attr
->form_is_block ())
13279 struct dwarf2_locexpr_baton
*dlbaton
;
13281 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13282 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13283 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13284 dlbaton
->per_cu
= cu
->per_cu
;
13286 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13288 else if (attr
->form_is_ref ())
13290 struct dwarf2_cu
*target_cu
= cu
;
13291 struct die_info
*target_die
;
13293 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13294 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13295 if (die_is_declaration (target_die
, target_cu
))
13297 const char *target_physname
;
13299 /* Prefer the mangled name; otherwise compute the demangled one. */
13300 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13301 if (target_physname
== NULL
)
13302 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13303 if (target_physname
== NULL
)
13304 complaint (_("DW_AT_call_target target DIE has invalid "
13305 "physname, for referencing DIE %s [in module %s]"),
13306 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13308 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13314 /* DW_AT_entry_pc should be preferred. */
13315 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13316 <= PC_BOUNDS_INVALID
)
13317 complaint (_("DW_AT_call_target target DIE has invalid "
13318 "low pc, for referencing DIE %s [in module %s]"),
13319 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13322 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13323 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
13328 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
13329 "block nor reference, for DIE %s [in module %s]"),
13330 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13332 call_site
->per_cu
= cu
->per_cu
;
13334 for (child_die
= die
->child
;
13335 child_die
&& child_die
->tag
;
13336 child_die
= child_die
->sibling
)
13338 struct call_site_parameter
*parameter
;
13339 struct attribute
*loc
, *origin
;
13341 if (child_die
->tag
!= DW_TAG_call_site_parameter
13342 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13344 /* Already printed the complaint above. */
13348 gdb_assert (call_site
->parameter_count
< nparams
);
13349 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
13351 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
13352 specifies DW_TAG_formal_parameter. Value of the data assumed for the
13353 register is contained in DW_AT_call_value. */
13355 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
13356 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
13357 if (origin
== NULL
)
13359 /* This was a pre-DWARF-5 GNU extension alias
13360 for DW_AT_call_parameter. */
13361 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
13363 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
13365 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
13367 sect_offset sect_off
= origin
->get_ref_die_offset ();
13368 if (!cu
->header
.offset_in_cu_p (sect_off
))
13370 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
13371 binding can be done only inside one CU. Such referenced DIE
13372 therefore cannot be even moved to DW_TAG_partial_unit. */
13373 complaint (_("DW_AT_call_parameter offset is not in CU for "
13374 "DW_TAG_call_site child DIE %s [in module %s]"),
13375 sect_offset_str (child_die
->sect_off
),
13376 objfile_name (objfile
));
13379 parameter
->u
.param_cu_off
13380 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
13382 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
13384 complaint (_("No DW_FORM_block* DW_AT_location for "
13385 "DW_TAG_call_site child DIE %s [in module %s]"),
13386 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
13391 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
13392 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
13393 if (parameter
->u
.dwarf_reg
!= -1)
13394 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
13395 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
13396 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
13397 ¶meter
->u
.fb_offset
))
13398 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
13401 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
13402 "for DW_FORM_block* DW_AT_location is supported for "
13403 "DW_TAG_call_site child DIE %s "
13405 sect_offset_str (child_die
->sect_off
),
13406 objfile_name (objfile
));
13411 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
13413 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
13414 if (attr
== NULL
|| !attr
->form_is_block ())
13416 complaint (_("No DW_FORM_block* DW_AT_call_value for "
13417 "DW_TAG_call_site child DIE %s [in module %s]"),
13418 sect_offset_str (child_die
->sect_off
),
13419 objfile_name (objfile
));
13422 parameter
->value
= DW_BLOCK (attr
)->data
;
13423 parameter
->value_size
= DW_BLOCK (attr
)->size
;
13425 /* Parameters are not pre-cleared by memset above. */
13426 parameter
->data_value
= NULL
;
13427 parameter
->data_value_size
= 0;
13428 call_site
->parameter_count
++;
13430 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
13432 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
13433 if (attr
!= nullptr)
13435 if (!attr
->form_is_block ())
13436 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
13437 "DW_TAG_call_site child DIE %s [in module %s]"),
13438 sect_offset_str (child_die
->sect_off
),
13439 objfile_name (objfile
));
13442 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13443 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13449 /* Helper function for read_variable. If DIE represents a virtual
13450 table, then return the type of the concrete object that is
13451 associated with the virtual table. Otherwise, return NULL. */
13453 static struct type
*
13454 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13456 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13460 /* Find the type DIE. */
13461 struct die_info
*type_die
= NULL
;
13462 struct dwarf2_cu
*type_cu
= cu
;
13464 if (attr
->form_is_ref ())
13465 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13466 if (type_die
== NULL
)
13469 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13471 return die_containing_type (type_die
, type_cu
);
13474 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13477 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13479 struct rust_vtable_symbol
*storage
= NULL
;
13481 if (cu
->language
== language_rust
)
13483 struct type
*containing_type
= rust_containing_type (die
, cu
);
13485 if (containing_type
!= NULL
)
13487 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13489 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol ();
13490 initialize_objfile_symbol (storage
);
13491 storage
->concrete_type
= containing_type
;
13492 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13496 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
13497 struct attribute
*abstract_origin
13498 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13499 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
13500 if (res
== NULL
&& loc
&& abstract_origin
)
13502 /* We have a variable without a name, but with a location and an abstract
13503 origin. This may be a concrete instance of an abstract variable
13504 referenced from an DW_OP_GNU_variable_value, so save it to find it back
13506 struct dwarf2_cu
*origin_cu
= cu
;
13507 struct die_info
*origin_die
13508 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
13509 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
13510 dpo
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
13514 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13515 reading .debug_rnglists.
13516 Callback's type should be:
13517 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13518 Return true if the attributes are present and valid, otherwise,
13521 template <typename Callback
>
13523 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13524 Callback
&&callback
)
13526 struct dwarf2_per_objfile
*dwarf2_per_objfile
13527 = cu
->per_cu
->dwarf2_per_objfile
;
13528 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13529 bfd
*obfd
= objfile
->obfd
;
13530 /* Base address selection entry. */
13531 gdb::optional
<CORE_ADDR
> base
;
13532 const gdb_byte
*buffer
;
13533 CORE_ADDR baseaddr
;
13534 bool overflow
= false;
13536 base
= cu
->base_address
;
13538 dwarf2_per_objfile
->rnglists
.read (objfile
);
13539 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
13541 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13545 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
13547 baseaddr
= objfile
->text_section_offset ();
13551 /* Initialize it due to a false compiler warning. */
13552 CORE_ADDR range_beginning
= 0, range_end
= 0;
13553 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
13554 + dwarf2_per_objfile
->rnglists
.size
);
13555 unsigned int bytes_read
;
13557 if (buffer
== buf_end
)
13562 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13565 case DW_RLE_end_of_list
:
13567 case DW_RLE_base_address
:
13568 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13573 base
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13574 buffer
+= bytes_read
;
13576 case DW_RLE_start_length
:
13577 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13582 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13584 buffer
+= bytes_read
;
13585 range_end
= (range_beginning
13586 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13587 buffer
+= bytes_read
;
13588 if (buffer
> buf_end
)
13594 case DW_RLE_offset_pair
:
13595 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13596 buffer
+= bytes_read
;
13597 if (buffer
> buf_end
)
13602 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13603 buffer
+= bytes_read
;
13604 if (buffer
> buf_end
)
13610 case DW_RLE_start_end
:
13611 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13616 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13618 buffer
+= bytes_read
;
13619 range_end
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13620 buffer
+= bytes_read
;
13623 complaint (_("Invalid .debug_rnglists data (no base address)"));
13626 if (rlet
== DW_RLE_end_of_list
|| overflow
)
13628 if (rlet
== DW_RLE_base_address
)
13631 if (!base
.has_value ())
13633 /* We have no valid base address for the ranges
13635 complaint (_("Invalid .debug_rnglists data (no base address)"));
13639 if (range_beginning
> range_end
)
13641 /* Inverted range entries are invalid. */
13642 complaint (_("Invalid .debug_rnglists data (inverted range)"));
13646 /* Empty range entries have no effect. */
13647 if (range_beginning
== range_end
)
13650 range_beginning
+= *base
;
13651 range_end
+= *base
;
13653 /* A not-uncommon case of bad debug info.
13654 Don't pollute the addrmap with bad data. */
13655 if (range_beginning
+ baseaddr
== 0
13656 && !dwarf2_per_objfile
->has_section_at_zero
)
13658 complaint (_(".debug_rnglists entry has start address of zero"
13659 " [in module %s]"), objfile_name (objfile
));
13663 callback (range_beginning
, range_end
);
13668 complaint (_("Offset %d is not terminated "
13669 "for DW_AT_ranges attribute"),
13677 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
13678 Callback's type should be:
13679 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13680 Return 1 if the attributes are present and valid, otherwise, return 0. */
13682 template <typename Callback
>
13684 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
13685 Callback
&&callback
)
13687 struct dwarf2_per_objfile
*dwarf2_per_objfile
13688 = cu
->per_cu
->dwarf2_per_objfile
;
13689 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13690 struct comp_unit_head
*cu_header
= &cu
->header
;
13691 bfd
*obfd
= objfile
->obfd
;
13692 unsigned int addr_size
= cu_header
->addr_size
;
13693 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13694 /* Base address selection entry. */
13695 gdb::optional
<CORE_ADDR
> base
;
13696 unsigned int dummy
;
13697 const gdb_byte
*buffer
;
13698 CORE_ADDR baseaddr
;
13700 if (cu_header
->version
>= 5)
13701 return dwarf2_rnglists_process (offset
, cu
, callback
);
13703 base
= cu
->base_address
;
13705 dwarf2_per_objfile
->ranges
.read (objfile
);
13706 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
13708 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13712 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
13714 baseaddr
= objfile
->text_section_offset ();
13718 CORE_ADDR range_beginning
, range_end
;
13720 range_beginning
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13721 buffer
+= addr_size
;
13722 range_end
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13723 buffer
+= addr_size
;
13724 offset
+= 2 * addr_size
;
13726 /* An end of list marker is a pair of zero addresses. */
13727 if (range_beginning
== 0 && range_end
== 0)
13728 /* Found the end of list entry. */
13731 /* Each base address selection entry is a pair of 2 values.
13732 The first is the largest possible address, the second is
13733 the base address. Check for a base address here. */
13734 if ((range_beginning
& mask
) == mask
)
13736 /* If we found the largest possible address, then we already
13737 have the base address in range_end. */
13742 if (!base
.has_value ())
13744 /* We have no valid base address for the ranges
13746 complaint (_("Invalid .debug_ranges data (no base address)"));
13750 if (range_beginning
> range_end
)
13752 /* Inverted range entries are invalid. */
13753 complaint (_("Invalid .debug_ranges data (inverted range)"));
13757 /* Empty range entries have no effect. */
13758 if (range_beginning
== range_end
)
13761 range_beginning
+= *base
;
13762 range_end
+= *base
;
13764 /* A not-uncommon case of bad debug info.
13765 Don't pollute the addrmap with bad data. */
13766 if (range_beginning
+ baseaddr
== 0
13767 && !dwarf2_per_objfile
->has_section_at_zero
)
13769 complaint (_(".debug_ranges entry has start address of zero"
13770 " [in module %s]"), objfile_name (objfile
));
13774 callback (range_beginning
, range_end
);
13780 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
13781 Return 1 if the attributes are present and valid, otherwise, return 0.
13782 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
13785 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
13786 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
13787 dwarf2_psymtab
*ranges_pst
)
13789 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13790 struct gdbarch
*gdbarch
= objfile
->arch ();
13791 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
13794 CORE_ADDR high
= 0;
13797 retval
= dwarf2_ranges_process (offset
, cu
,
13798 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
13800 if (ranges_pst
!= NULL
)
13805 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13806 range_beginning
+ baseaddr
)
13808 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13809 range_end
+ baseaddr
)
13811 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
13812 lowpc
, highpc
- 1, ranges_pst
);
13815 /* FIXME: This is recording everything as a low-high
13816 segment of consecutive addresses. We should have a
13817 data structure for discontiguous block ranges
13821 low
= range_beginning
;
13827 if (range_beginning
< low
)
13828 low
= range_beginning
;
13829 if (range_end
> high
)
13837 /* If the first entry is an end-of-list marker, the range
13838 describes an empty scope, i.e. no instructions. */
13844 *high_return
= high
;
13848 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
13849 definition for the return value. *LOWPC and *HIGHPC are set iff
13850 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
13852 static enum pc_bounds_kind
13853 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
13854 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
13855 dwarf2_psymtab
*pst
)
13857 struct dwarf2_per_objfile
*dwarf2_per_objfile
13858 = cu
->per_cu
->dwarf2_per_objfile
;
13859 struct attribute
*attr
;
13860 struct attribute
*attr_high
;
13862 CORE_ADDR high
= 0;
13863 enum pc_bounds_kind ret
;
13865 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
13868 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13869 if (attr
!= nullptr)
13871 low
= attr
->value_as_address ();
13872 high
= attr_high
->value_as_address ();
13873 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
13877 /* Found high w/o low attribute. */
13878 return PC_BOUNDS_INVALID
;
13880 /* Found consecutive range of addresses. */
13881 ret
= PC_BOUNDS_HIGH_LOW
;
13885 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
13888 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
13889 We take advantage of the fact that DW_AT_ranges does not appear
13890 in DW_TAG_compile_unit of DWO files. */
13891 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
13892 unsigned int ranges_offset
= (DW_UNSND (attr
)
13893 + (need_ranges_base
13897 /* Value of the DW_AT_ranges attribute is the offset in the
13898 .debug_ranges section. */
13899 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
13900 return PC_BOUNDS_INVALID
;
13901 /* Found discontinuous range of addresses. */
13902 ret
= PC_BOUNDS_RANGES
;
13905 return PC_BOUNDS_NOT_PRESENT
;
13908 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
13910 return PC_BOUNDS_INVALID
;
13912 /* When using the GNU linker, .gnu.linkonce. sections are used to
13913 eliminate duplicate copies of functions and vtables and such.
13914 The linker will arbitrarily choose one and discard the others.
13915 The AT_*_pc values for such functions refer to local labels in
13916 these sections. If the section from that file was discarded, the
13917 labels are not in the output, so the relocs get a value of 0.
13918 If this is a discarded function, mark the pc bounds as invalid,
13919 so that GDB will ignore it. */
13920 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13921 return PC_BOUNDS_INVALID
;
13929 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
13930 its low and high PC addresses. Do nothing if these addresses could not
13931 be determined. Otherwise, set LOWPC to the low address if it is smaller,
13932 and HIGHPC to the high address if greater than HIGHPC. */
13935 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
13936 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13937 struct dwarf2_cu
*cu
)
13939 CORE_ADDR low
, high
;
13940 struct die_info
*child
= die
->child
;
13942 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
13944 *lowpc
= std::min (*lowpc
, low
);
13945 *highpc
= std::max (*highpc
, high
);
13948 /* If the language does not allow nested subprograms (either inside
13949 subprograms or lexical blocks), we're done. */
13950 if (cu
->language
!= language_ada
)
13953 /* Check all the children of the given DIE. If it contains nested
13954 subprograms, then check their pc bounds. Likewise, we need to
13955 check lexical blocks as well, as they may also contain subprogram
13957 while (child
&& child
->tag
)
13959 if (child
->tag
== DW_TAG_subprogram
13960 || child
->tag
== DW_TAG_lexical_block
)
13961 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
13962 child
= child
->sibling
;
13966 /* Get the low and high pc's represented by the scope DIE, and store
13967 them in *LOWPC and *HIGHPC. If the correct values can't be
13968 determined, set *LOWPC to -1 and *HIGHPC to 0. */
13971 get_scope_pc_bounds (struct die_info
*die
,
13972 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13973 struct dwarf2_cu
*cu
)
13975 CORE_ADDR best_low
= (CORE_ADDR
) -1;
13976 CORE_ADDR best_high
= (CORE_ADDR
) 0;
13977 CORE_ADDR current_low
, current_high
;
13979 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
13980 >= PC_BOUNDS_RANGES
)
13982 best_low
= current_low
;
13983 best_high
= current_high
;
13987 struct die_info
*child
= die
->child
;
13989 while (child
&& child
->tag
)
13991 switch (child
->tag
) {
13992 case DW_TAG_subprogram
:
13993 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
13995 case DW_TAG_namespace
:
13996 case DW_TAG_module
:
13997 /* FIXME: carlton/2004-01-16: Should we do this for
13998 DW_TAG_class_type/DW_TAG_structure_type, too? I think
13999 that current GCC's always emit the DIEs corresponding
14000 to definitions of methods of classes as children of a
14001 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14002 the DIEs giving the declarations, which could be
14003 anywhere). But I don't see any reason why the
14004 standards says that they have to be there. */
14005 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14007 if (current_low
!= ((CORE_ADDR
) -1))
14009 best_low
= std::min (best_low
, current_low
);
14010 best_high
= std::max (best_high
, current_high
);
14018 child
= child
->sibling
;
14023 *highpc
= best_high
;
14026 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14030 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14031 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14033 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14034 struct gdbarch
*gdbarch
= objfile
->arch ();
14035 struct attribute
*attr
;
14036 struct attribute
*attr_high
;
14038 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14041 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14042 if (attr
!= nullptr)
14044 CORE_ADDR low
= attr
->value_as_address ();
14045 CORE_ADDR high
= attr_high
->value_as_address ();
14047 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14050 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14051 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14052 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14056 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14057 if (attr
!= nullptr)
14059 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14060 We take advantage of the fact that DW_AT_ranges does not appear
14061 in DW_TAG_compile_unit of DWO files. */
14062 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14064 /* The value of the DW_AT_ranges attribute is the offset of the
14065 address range list in the .debug_ranges section. */
14066 unsigned long offset
= (DW_UNSND (attr
)
14067 + (need_ranges_base
? cu
->ranges_base
: 0));
14069 std::vector
<blockrange
> blockvec
;
14070 dwarf2_ranges_process (offset
, cu
,
14071 [&] (CORE_ADDR start
, CORE_ADDR end
)
14075 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14076 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14077 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14078 blockvec
.emplace_back (start
, end
);
14081 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14085 /* Check whether the producer field indicates either of GCC < 4.6, or the
14086 Intel C/C++ compiler, and cache the result in CU. */
14089 check_producer (struct dwarf2_cu
*cu
)
14093 if (cu
->producer
== NULL
)
14095 /* For unknown compilers expect their behavior is DWARF version
14098 GCC started to support .debug_types sections by -gdwarf-4 since
14099 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14100 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14101 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14102 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14104 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14106 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14107 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14109 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14111 cu
->producer_is_icc
= true;
14112 cu
->producer_is_icc_lt_14
= major
< 14;
14114 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14115 cu
->producer_is_codewarrior
= true;
14118 /* For other non-GCC compilers, expect their behavior is DWARF version
14122 cu
->checked_producer
= true;
14125 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14126 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14127 during 4.6.0 experimental. */
14130 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14132 if (!cu
->checked_producer
)
14133 check_producer (cu
);
14135 return cu
->producer_is_gxx_lt_4_6
;
14139 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14140 with incorrect is_stmt attributes. */
14143 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14145 if (!cu
->checked_producer
)
14146 check_producer (cu
);
14148 return cu
->producer_is_codewarrior
;
14151 /* Return the default accessibility type if it is not overridden by
14152 DW_AT_accessibility. */
14154 static enum dwarf_access_attribute
14155 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14157 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14159 /* The default DWARF 2 accessibility for members is public, the default
14160 accessibility for inheritance is private. */
14162 if (die
->tag
!= DW_TAG_inheritance
)
14163 return DW_ACCESS_public
;
14165 return DW_ACCESS_private
;
14169 /* DWARF 3+ defines the default accessibility a different way. The same
14170 rules apply now for DW_TAG_inheritance as for the members and it only
14171 depends on the container kind. */
14173 if (die
->parent
->tag
== DW_TAG_class_type
)
14174 return DW_ACCESS_private
;
14176 return DW_ACCESS_public
;
14180 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14181 offset. If the attribute was not found return 0, otherwise return
14182 1. If it was found but could not properly be handled, set *OFFSET
14186 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14189 struct attribute
*attr
;
14191 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14196 /* Note that we do not check for a section offset first here.
14197 This is because DW_AT_data_member_location is new in DWARF 4,
14198 so if we see it, we can assume that a constant form is really
14199 a constant and not a section offset. */
14200 if (attr
->form_is_constant ())
14201 *offset
= attr
->constant_value (0);
14202 else if (attr
->form_is_section_offset ())
14203 dwarf2_complex_location_expr_complaint ();
14204 else if (attr
->form_is_block ())
14205 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14207 dwarf2_complex_location_expr_complaint ();
14215 /* Look for DW_AT_data_member_location and store the results in FIELD. */
14218 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14219 struct field
*field
)
14221 struct attribute
*attr
;
14223 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14226 if (attr
->form_is_constant ())
14228 LONGEST offset
= attr
->constant_value (0);
14229 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14231 else if (attr
->form_is_section_offset ())
14232 dwarf2_complex_location_expr_complaint ();
14233 else if (attr
->form_is_block ())
14236 CORE_ADDR offset
= decode_locdesc (DW_BLOCK (attr
), cu
, &handled
);
14238 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14241 struct objfile
*objfile
14242 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14243 struct dwarf2_locexpr_baton
*dlbaton
14244 = XOBNEW (&objfile
->objfile_obstack
,
14245 struct dwarf2_locexpr_baton
);
14246 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14247 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14248 /* When using this baton, we want to compute the address
14249 of the field, not the value. This is why
14250 is_reference is set to false here. */
14251 dlbaton
->is_reference
= false;
14252 dlbaton
->per_cu
= cu
->per_cu
;
14254 SET_FIELD_DWARF_BLOCK (*field
, dlbaton
);
14258 dwarf2_complex_location_expr_complaint ();
14262 /* Add an aggregate field to the field list. */
14265 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14266 struct dwarf2_cu
*cu
)
14268 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14269 struct gdbarch
*gdbarch
= objfile
->arch ();
14270 struct nextfield
*new_field
;
14271 struct attribute
*attr
;
14273 const char *fieldname
= "";
14275 if (die
->tag
== DW_TAG_inheritance
)
14277 fip
->baseclasses
.emplace_back ();
14278 new_field
= &fip
->baseclasses
.back ();
14282 fip
->fields
.emplace_back ();
14283 new_field
= &fip
->fields
.back ();
14286 new_field
->offset
= die
->sect_off
;
14288 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14289 if (attr
!= nullptr)
14290 new_field
->accessibility
= DW_UNSND (attr
);
14292 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14293 if (new_field
->accessibility
!= DW_ACCESS_public
)
14294 fip
->non_public_fields
= 1;
14296 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14297 if (attr
!= nullptr)
14298 new_field
->virtuality
= DW_UNSND (attr
);
14300 new_field
->virtuality
= DW_VIRTUALITY_none
;
14302 fp
= &new_field
->field
;
14304 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14306 /* Data member other than a C++ static data member. */
14308 /* Get type of field. */
14309 fp
->type
= die_type (die
, cu
);
14311 SET_FIELD_BITPOS (*fp
, 0);
14313 /* Get bit size of field (zero if none). */
14314 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14315 if (attr
!= nullptr)
14317 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14321 FIELD_BITSIZE (*fp
) = 0;
14324 /* Get bit offset of field. */
14325 handle_data_member_location (die
, cu
, fp
);
14326 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14327 if (attr
!= nullptr)
14329 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
14331 /* For big endian bits, the DW_AT_bit_offset gives the
14332 additional bit offset from the MSB of the containing
14333 anonymous object to the MSB of the field. We don't
14334 have to do anything special since we don't need to
14335 know the size of the anonymous object. */
14336 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14340 /* For little endian bits, compute the bit offset to the
14341 MSB of the anonymous object, subtract off the number of
14342 bits from the MSB of the field to the MSB of the
14343 object, and then subtract off the number of bits of
14344 the field itself. The result is the bit offset of
14345 the LSB of the field. */
14346 int anonymous_size
;
14347 int bit_offset
= DW_UNSND (attr
);
14349 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14350 if (attr
!= nullptr)
14352 /* The size of the anonymous object containing
14353 the bit field is explicit, so use the
14354 indicated size (in bytes). */
14355 anonymous_size
= DW_UNSND (attr
);
14359 /* The size of the anonymous object containing
14360 the bit field must be inferred from the type
14361 attribute of the data member containing the
14363 anonymous_size
= TYPE_LENGTH (fp
->type
);
14365 SET_FIELD_BITPOS (*fp
,
14366 (FIELD_BITPOS (*fp
)
14367 + anonymous_size
* bits_per_byte
14368 - bit_offset
- FIELD_BITSIZE (*fp
)));
14371 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14373 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14374 + attr
->constant_value (0)));
14376 /* Get name of field. */
14377 fieldname
= dwarf2_name (die
, cu
);
14378 if (fieldname
== NULL
)
14381 /* The name is already allocated along with this objfile, so we don't
14382 need to duplicate it for the type. */
14383 fp
->name
= fieldname
;
14385 /* Change accessibility for artificial fields (e.g. virtual table
14386 pointer or virtual base class pointer) to private. */
14387 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14389 FIELD_ARTIFICIAL (*fp
) = 1;
14390 new_field
->accessibility
= DW_ACCESS_private
;
14391 fip
->non_public_fields
= 1;
14394 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14396 /* C++ static member. */
14398 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14399 is a declaration, but all versions of G++ as of this writing
14400 (so through at least 3.2.1) incorrectly generate
14401 DW_TAG_variable tags. */
14403 const char *physname
;
14405 /* Get name of field. */
14406 fieldname
= dwarf2_name (die
, cu
);
14407 if (fieldname
== NULL
)
14410 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14412 /* Only create a symbol if this is an external value.
14413 new_symbol checks this and puts the value in the global symbol
14414 table, which we want. If it is not external, new_symbol
14415 will try to put the value in cu->list_in_scope which is wrong. */
14416 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
14418 /* A static const member, not much different than an enum as far as
14419 we're concerned, except that we can support more types. */
14420 new_symbol (die
, NULL
, cu
);
14423 /* Get physical name. */
14424 physname
= dwarf2_physname (fieldname
, die
, cu
);
14426 /* The name is already allocated along with this objfile, so we don't
14427 need to duplicate it for the type. */
14428 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
14429 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14430 FIELD_NAME (*fp
) = fieldname
;
14432 else if (die
->tag
== DW_TAG_inheritance
)
14434 /* C++ base class field. */
14435 handle_data_member_location (die
, cu
, fp
);
14436 FIELD_BITSIZE (*fp
) = 0;
14437 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14438 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
14441 gdb_assert_not_reached ("missing case in dwarf2_add_field");
14444 /* Can the type given by DIE define another type? */
14447 type_can_define_types (const struct die_info
*die
)
14451 case DW_TAG_typedef
:
14452 case DW_TAG_class_type
:
14453 case DW_TAG_structure_type
:
14454 case DW_TAG_union_type
:
14455 case DW_TAG_enumeration_type
:
14463 /* Add a type definition defined in the scope of the FIP's class. */
14466 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
14467 struct dwarf2_cu
*cu
)
14469 struct decl_field fp
;
14470 memset (&fp
, 0, sizeof (fp
));
14472 gdb_assert (type_can_define_types (die
));
14474 /* Get name of field. NULL is okay here, meaning an anonymous type. */
14475 fp
.name
= dwarf2_name (die
, cu
);
14476 fp
.type
= read_type_die (die
, cu
);
14478 /* Save accessibility. */
14479 enum dwarf_access_attribute accessibility
;
14480 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14482 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14484 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14485 switch (accessibility
)
14487 case DW_ACCESS_public
:
14488 /* The assumed value if neither private nor protected. */
14490 case DW_ACCESS_private
:
14493 case DW_ACCESS_protected
:
14494 fp
.is_protected
= 1;
14497 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14500 if (die
->tag
== DW_TAG_typedef
)
14501 fip
->typedef_field_list
.push_back (fp
);
14503 fip
->nested_types_list
.push_back (fp
);
14506 /* A convenience typedef that's used when finding the discriminant
14507 field for a variant part. */
14508 typedef std::unordered_map
<sect_offset
, int> offset_map_type
;
14510 /* Compute the discriminant range for a given variant. OBSTACK is
14511 where the results will be stored. VARIANT is the variant to
14512 process. IS_UNSIGNED indicates whether the discriminant is signed
14515 static const gdb::array_view
<discriminant_range
>
14516 convert_variant_range (struct obstack
*obstack
, const variant_field
&variant
,
14519 std::vector
<discriminant_range
> ranges
;
14521 if (variant
.default_branch
)
14524 if (variant
.discr_list_data
== nullptr)
14526 discriminant_range r
14527 = {variant
.discriminant_value
, variant
.discriminant_value
};
14528 ranges
.push_back (r
);
14532 gdb::array_view
<const gdb_byte
> data (variant
.discr_list_data
->data
,
14533 variant
.discr_list_data
->size
);
14534 while (!data
.empty ())
14536 if (data
[0] != DW_DSC_range
&& data
[0] != DW_DSC_label
)
14538 complaint (_("invalid discriminant marker: %d"), data
[0]);
14541 bool is_range
= data
[0] == DW_DSC_range
;
14542 data
= data
.slice (1);
14544 ULONGEST low
, high
;
14545 unsigned int bytes_read
;
14549 complaint (_("DW_AT_discr_list missing low value"));
14553 low
= read_unsigned_leb128 (nullptr, data
.data (), &bytes_read
);
14555 low
= (ULONGEST
) read_signed_leb128 (nullptr, data
.data (),
14557 data
= data
.slice (bytes_read
);
14563 complaint (_("DW_AT_discr_list missing high value"));
14567 high
= read_unsigned_leb128 (nullptr, data
.data (),
14570 high
= (LONGEST
) read_signed_leb128 (nullptr, data
.data (),
14572 data
= data
.slice (bytes_read
);
14577 ranges
.push_back ({ low
, high
});
14581 discriminant_range
*result
= XOBNEWVEC (obstack
, discriminant_range
,
14583 std::copy (ranges
.begin (), ranges
.end (), result
);
14584 return gdb::array_view
<discriminant_range
> (result
, ranges
.size ());
14587 static const gdb::array_view
<variant_part
> create_variant_parts
14588 (struct obstack
*obstack
,
14589 const offset_map_type
&offset_map
,
14590 struct field_info
*fi
,
14591 const std::vector
<variant_part_builder
> &variant_parts
);
14593 /* Fill in a "struct variant" for a given variant field. RESULT is
14594 the variant to fill in. OBSTACK is where any needed allocations
14595 will be done. OFFSET_MAP holds the mapping from section offsets to
14596 fields for the type. FI describes the fields of the type we're
14597 processing. FIELD is the variant field we're converting. */
14600 create_one_variant (variant
&result
, struct obstack
*obstack
,
14601 const offset_map_type
&offset_map
,
14602 struct field_info
*fi
, const variant_field
&field
)
14604 result
.discriminants
= convert_variant_range (obstack
, field
, false);
14605 result
.first_field
= field
.first_field
+ fi
->baseclasses
.size ();
14606 result
.last_field
= field
.last_field
+ fi
->baseclasses
.size ();
14607 result
.parts
= create_variant_parts (obstack
, offset_map
, fi
,
14608 field
.variant_parts
);
14611 /* Fill in a "struct variant_part" for a given variant part. RESULT
14612 is the variant part to fill in. OBSTACK is where any needed
14613 allocations will be done. OFFSET_MAP holds the mapping from
14614 section offsets to fields for the type. FI describes the fields of
14615 the type we're processing. BUILDER is the variant part to be
14619 create_one_variant_part (variant_part
&result
,
14620 struct obstack
*obstack
,
14621 const offset_map_type
&offset_map
,
14622 struct field_info
*fi
,
14623 const variant_part_builder
&builder
)
14625 auto iter
= offset_map
.find (builder
.discriminant_offset
);
14626 if (iter
== offset_map
.end ())
14628 result
.discriminant_index
= -1;
14629 /* Doesn't matter. */
14630 result
.is_unsigned
= false;
14634 result
.discriminant_index
= iter
->second
;
14636 = TYPE_UNSIGNED (FIELD_TYPE
14637 (fi
->fields
[result
.discriminant_index
].field
));
14640 size_t n
= builder
.variants
.size ();
14641 variant
*output
= new (obstack
) variant
[n
];
14642 for (size_t i
= 0; i
< n
; ++i
)
14643 create_one_variant (output
[i
], obstack
, offset_map
, fi
,
14644 builder
.variants
[i
]);
14646 result
.variants
= gdb::array_view
<variant
> (output
, n
);
14649 /* Create a vector of variant parts that can be attached to a type.
14650 OBSTACK is where any needed allocations will be done. OFFSET_MAP
14651 holds the mapping from section offsets to fields for the type. FI
14652 describes the fields of the type we're processing. VARIANT_PARTS
14653 is the vector to convert. */
14655 static const gdb::array_view
<variant_part
>
14656 create_variant_parts (struct obstack
*obstack
,
14657 const offset_map_type
&offset_map
,
14658 struct field_info
*fi
,
14659 const std::vector
<variant_part_builder
> &variant_parts
)
14661 if (variant_parts
.empty ())
14664 size_t n
= variant_parts
.size ();
14665 variant_part
*result
= new (obstack
) variant_part
[n
];
14666 for (size_t i
= 0; i
< n
; ++i
)
14667 create_one_variant_part (result
[i
], obstack
, offset_map
, fi
,
14670 return gdb::array_view
<variant_part
> (result
, n
);
14673 /* Compute the variant part vector for FIP, attaching it to TYPE when
14677 add_variant_property (struct field_info
*fip
, struct type
*type
,
14678 struct dwarf2_cu
*cu
)
14680 /* Map section offsets of fields to their field index. Note the
14681 field index here does not take the number of baseclasses into
14683 offset_map_type offset_map
;
14684 for (int i
= 0; i
< fip
->fields
.size (); ++i
)
14685 offset_map
[fip
->fields
[i
].offset
] = i
;
14687 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14688 gdb::array_view
<variant_part
> parts
14689 = create_variant_parts (&objfile
->objfile_obstack
, offset_map
, fip
,
14690 fip
->variant_parts
);
14692 struct dynamic_prop prop
;
14693 prop
.kind
= PROP_VARIANT_PARTS
;
14694 prop
.data
.variant_parts
14695 = ((gdb::array_view
<variant_part
> *)
14696 obstack_copy (&objfile
->objfile_obstack
, &parts
, sizeof (parts
)));
14698 add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
, type
);
14701 /* Create the vector of fields, and attach it to the type. */
14704 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14705 struct dwarf2_cu
*cu
)
14707 int nfields
= fip
->nfields ();
14709 /* Record the field count, allocate space for the array of fields,
14710 and create blank accessibility bitfields if necessary. */
14711 TYPE_NFIELDS (type
) = nfields
;
14712 TYPE_FIELDS (type
) = (struct field
*)
14713 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
14715 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14717 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14719 TYPE_FIELD_PRIVATE_BITS (type
) =
14720 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14721 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14723 TYPE_FIELD_PROTECTED_BITS (type
) =
14724 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14725 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14727 TYPE_FIELD_IGNORE_BITS (type
) =
14728 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14729 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14732 /* If the type has baseclasses, allocate and clear a bit vector for
14733 TYPE_FIELD_VIRTUAL_BITS. */
14734 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
14736 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
14737 unsigned char *pointer
;
14739 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14740 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14741 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14742 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
14743 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
14746 if (!fip
->variant_parts
.empty ())
14747 add_variant_property (fip
, type
, cu
);
14749 /* Copy the saved-up fields into the field vector. */
14750 for (int i
= 0; i
< nfields
; ++i
)
14752 struct nextfield
&field
14753 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
14754 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
14756 TYPE_FIELD (type
, i
) = field
.field
;
14757 switch (field
.accessibility
)
14759 case DW_ACCESS_private
:
14760 if (cu
->language
!= language_ada
)
14761 SET_TYPE_FIELD_PRIVATE (type
, i
);
14764 case DW_ACCESS_protected
:
14765 if (cu
->language
!= language_ada
)
14766 SET_TYPE_FIELD_PROTECTED (type
, i
);
14769 case DW_ACCESS_public
:
14773 /* Unknown accessibility. Complain and treat it as public. */
14775 complaint (_("unsupported accessibility %d"),
14776 field
.accessibility
);
14780 if (i
< fip
->baseclasses
.size ())
14782 switch (field
.virtuality
)
14784 case DW_VIRTUALITY_virtual
:
14785 case DW_VIRTUALITY_pure_virtual
:
14786 if (cu
->language
== language_ada
)
14787 error (_("unexpected virtuality in component of Ada type"));
14788 SET_TYPE_FIELD_VIRTUAL (type
, i
);
14795 /* Return true if this member function is a constructor, false
14799 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14801 const char *fieldname
;
14802 const char *type_name
;
14805 if (die
->parent
== NULL
)
14808 if (die
->parent
->tag
!= DW_TAG_structure_type
14809 && die
->parent
->tag
!= DW_TAG_union_type
14810 && die
->parent
->tag
!= DW_TAG_class_type
)
14813 fieldname
= dwarf2_name (die
, cu
);
14814 type_name
= dwarf2_name (die
->parent
, cu
);
14815 if (fieldname
== NULL
|| type_name
== NULL
)
14818 len
= strlen (fieldname
);
14819 return (strncmp (fieldname
, type_name
, len
) == 0
14820 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
14823 /* Check if the given VALUE is a recognized enum
14824 dwarf_defaulted_attribute constant according to DWARF5 spec,
14828 is_valid_DW_AT_defaulted (ULONGEST value
)
14832 case DW_DEFAULTED_no
:
14833 case DW_DEFAULTED_in_class
:
14834 case DW_DEFAULTED_out_of_class
:
14838 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
14842 /* Add a member function to the proper fieldlist. */
14845 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
14846 struct type
*type
, struct dwarf2_cu
*cu
)
14848 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14849 struct attribute
*attr
;
14851 struct fnfieldlist
*flp
= nullptr;
14852 struct fn_field
*fnp
;
14853 const char *fieldname
;
14854 struct type
*this_type
;
14855 enum dwarf_access_attribute accessibility
;
14857 if (cu
->language
== language_ada
)
14858 error (_("unexpected member function in Ada type"));
14860 /* Get name of member function. */
14861 fieldname
= dwarf2_name (die
, cu
);
14862 if (fieldname
== NULL
)
14865 /* Look up member function name in fieldlist. */
14866 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
14868 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
14870 flp
= &fip
->fnfieldlists
[i
];
14875 /* Create a new fnfieldlist if necessary. */
14876 if (flp
== nullptr)
14878 fip
->fnfieldlists
.emplace_back ();
14879 flp
= &fip
->fnfieldlists
.back ();
14880 flp
->name
= fieldname
;
14881 i
= fip
->fnfieldlists
.size () - 1;
14884 /* Create a new member function field and add it to the vector of
14886 flp
->fnfields
.emplace_back ();
14887 fnp
= &flp
->fnfields
.back ();
14889 /* Delay processing of the physname until later. */
14890 if (cu
->language
== language_cplus
)
14891 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
14895 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
14896 fnp
->physname
= physname
? physname
: "";
14899 fnp
->type
= alloc_type (objfile
);
14900 this_type
= read_type_die (die
, cu
);
14901 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
14903 int nparams
= TYPE_NFIELDS (this_type
);
14905 /* TYPE is the domain of this method, and THIS_TYPE is the type
14906 of the method itself (TYPE_CODE_METHOD). */
14907 smash_to_method_type (fnp
->type
, type
,
14908 TYPE_TARGET_TYPE (this_type
),
14909 TYPE_FIELDS (this_type
),
14910 TYPE_NFIELDS (this_type
),
14911 TYPE_VARARGS (this_type
));
14913 /* Handle static member functions.
14914 Dwarf2 has no clean way to discern C++ static and non-static
14915 member functions. G++ helps GDB by marking the first
14916 parameter for non-static member functions (which is the this
14917 pointer) as artificial. We obtain this information from
14918 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
14919 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
14920 fnp
->voffset
= VOFFSET_STATIC
;
14923 complaint (_("member function type missing for '%s'"),
14924 dwarf2_full_name (fieldname
, die
, cu
));
14926 /* Get fcontext from DW_AT_containing_type if present. */
14927 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
14928 fnp
->fcontext
= die_containing_type (die
, cu
);
14930 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
14931 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
14933 /* Get accessibility. */
14934 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14935 if (attr
!= nullptr)
14936 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14938 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14939 switch (accessibility
)
14941 case DW_ACCESS_private
:
14942 fnp
->is_private
= 1;
14944 case DW_ACCESS_protected
:
14945 fnp
->is_protected
= 1;
14949 /* Check for artificial methods. */
14950 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
14951 if (attr
&& DW_UNSND (attr
) != 0)
14952 fnp
->is_artificial
= 1;
14954 /* Check for defaulted methods. */
14955 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
14956 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
14957 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
14959 /* Check for deleted methods. */
14960 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
14961 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
14962 fnp
->is_deleted
= 1;
14964 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
14966 /* Get index in virtual function table if it is a virtual member
14967 function. For older versions of GCC, this is an offset in the
14968 appropriate virtual table, as specified by DW_AT_containing_type.
14969 For everyone else, it is an expression to be evaluated relative
14970 to the object address. */
14972 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
14973 if (attr
!= nullptr)
14975 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
> 0)
14977 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
14979 /* Old-style GCC. */
14980 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
14982 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
14983 || (DW_BLOCK (attr
)->size
> 1
14984 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
14985 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
14987 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14988 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
14989 dwarf2_complex_location_expr_complaint ();
14991 fnp
->voffset
/= cu
->header
.addr_size
;
14995 dwarf2_complex_location_expr_complaint ();
14997 if (!fnp
->fcontext
)
14999 /* If there is no `this' field and no DW_AT_containing_type,
15000 we cannot actually find a base class context for the
15002 if (TYPE_NFIELDS (this_type
) == 0
15003 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15005 complaint (_("cannot determine context for virtual member "
15006 "function \"%s\" (offset %s)"),
15007 fieldname
, sect_offset_str (die
->sect_off
));
15012 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15016 else if (attr
->form_is_section_offset ())
15018 dwarf2_complex_location_expr_complaint ();
15022 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15028 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15029 if (attr
&& DW_UNSND (attr
))
15031 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15032 complaint (_("Member function \"%s\" (offset %s) is virtual "
15033 "but the vtable offset is not specified"),
15034 fieldname
, sect_offset_str (die
->sect_off
));
15035 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15036 TYPE_CPLUS_DYNAMIC (type
) = 1;
15041 /* Create the vector of member function fields, and attach it to the type. */
15044 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15045 struct dwarf2_cu
*cu
)
15047 if (cu
->language
== language_ada
)
15048 error (_("unexpected member functions in Ada type"));
15050 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15051 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15053 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15055 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15057 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15058 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15060 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15061 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15062 fn_flp
->fn_fields
= (struct fn_field
*)
15063 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15065 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15066 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15069 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15072 /* Returns non-zero if NAME is the name of a vtable member in CU's
15073 language, zero otherwise. */
15075 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15077 static const char vptr
[] = "_vptr";
15079 /* Look for the C++ form of the vtable. */
15080 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15086 /* GCC outputs unnamed structures that are really pointers to member
15087 functions, with the ABI-specified layout. If TYPE describes
15088 such a structure, smash it into a member function type.
15090 GCC shouldn't do this; it should just output pointer to member DIEs.
15091 This is GCC PR debug/28767. */
15094 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15096 struct type
*pfn_type
, *self_type
, *new_type
;
15098 /* Check for a structure with no name and two children. */
15099 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15102 /* Check for __pfn and __delta members. */
15103 if (TYPE_FIELD_NAME (type
, 0) == NULL
15104 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15105 || TYPE_FIELD_NAME (type
, 1) == NULL
15106 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15109 /* Find the type of the method. */
15110 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15111 if (pfn_type
== NULL
15112 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15113 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15116 /* Look for the "this" argument. */
15117 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15118 if (TYPE_NFIELDS (pfn_type
) == 0
15119 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15120 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15123 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15124 new_type
= alloc_type (objfile
);
15125 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15126 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15127 TYPE_VARARGS (pfn_type
));
15128 smash_to_methodptr_type (type
, new_type
);
15131 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15132 appropriate error checking and issuing complaints if there is a
15136 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15138 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15140 if (attr
== nullptr)
15143 if (!attr
->form_is_constant ())
15145 complaint (_("DW_AT_alignment must have constant form"
15146 " - DIE at %s [in module %s]"),
15147 sect_offset_str (die
->sect_off
),
15148 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15153 if (attr
->form
== DW_FORM_sdata
)
15155 LONGEST val
= DW_SND (attr
);
15158 complaint (_("DW_AT_alignment value must not be negative"
15159 " - DIE at %s [in module %s]"),
15160 sect_offset_str (die
->sect_off
),
15161 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15167 align
= DW_UNSND (attr
);
15171 complaint (_("DW_AT_alignment value must not be zero"
15172 " - DIE at %s [in module %s]"),
15173 sect_offset_str (die
->sect_off
),
15174 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15177 if ((align
& (align
- 1)) != 0)
15179 complaint (_("DW_AT_alignment value must be a power of 2"
15180 " - DIE at %s [in module %s]"),
15181 sect_offset_str (die
->sect_off
),
15182 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15189 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15190 the alignment for TYPE. */
15193 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15196 if (!set_type_align (type
, get_alignment (cu
, die
)))
15197 complaint (_("DW_AT_alignment value too large"
15198 " - DIE at %s [in module %s]"),
15199 sect_offset_str (die
->sect_off
),
15200 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15203 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15204 constant for a type, according to DWARF5 spec, Table 5.5. */
15207 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
15212 case DW_CC_pass_by_reference
:
15213 case DW_CC_pass_by_value
:
15217 complaint (_("unrecognized DW_AT_calling_convention value "
15218 "(%s) for a type"), pulongest (value
));
15223 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15224 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
15225 also according to GNU-specific values (see include/dwarf2.h). */
15228 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15233 case DW_CC_program
:
15237 case DW_CC_GNU_renesas_sh
:
15238 case DW_CC_GNU_borland_fastcall_i386
:
15239 case DW_CC_GDB_IBM_OpenCL
:
15243 complaint (_("unrecognized DW_AT_calling_convention value "
15244 "(%s) for a subroutine"), pulongest (value
));
15249 /* Called when we find the DIE that starts a structure or union scope
15250 (definition) to create a type for the structure or union. Fill in
15251 the type's name and general properties; the members will not be
15252 processed until process_structure_scope. A symbol table entry for
15253 the type will also not be done until process_structure_scope (assuming
15254 the type has a name).
15256 NOTE: we need to call these functions regardless of whether or not the
15257 DIE has a DW_AT_name attribute, since it might be an anonymous
15258 structure or union. This gets the type entered into our set of
15259 user defined types. */
15261 static struct type
*
15262 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15264 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15266 struct attribute
*attr
;
15269 /* If the definition of this type lives in .debug_types, read that type.
15270 Don't follow DW_AT_specification though, that will take us back up
15271 the chain and we want to go down. */
15272 attr
= die
->attr (DW_AT_signature
);
15273 if (attr
!= nullptr)
15275 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15277 /* The type's CU may not be the same as CU.
15278 Ensure TYPE is recorded with CU in die_type_hash. */
15279 return set_die_type (die
, type
, cu
);
15282 type
= alloc_type (objfile
);
15283 INIT_CPLUS_SPECIFIC (type
);
15285 name
= dwarf2_name (die
, cu
);
15288 if (cu
->language
== language_cplus
15289 || cu
->language
== language_d
15290 || cu
->language
== language_rust
)
15292 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15294 /* dwarf2_full_name might have already finished building the DIE's
15295 type. If so, there is no need to continue. */
15296 if (get_die_type (die
, cu
) != NULL
)
15297 return get_die_type (die
, cu
);
15299 TYPE_NAME (type
) = full_name
;
15303 /* The name is already allocated along with this objfile, so
15304 we don't need to duplicate it for the type. */
15305 TYPE_NAME (type
) = name
;
15309 if (die
->tag
== DW_TAG_structure_type
)
15311 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15313 else if (die
->tag
== DW_TAG_union_type
)
15315 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15319 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15322 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15323 TYPE_DECLARED_CLASS (type
) = 1;
15325 /* Store the calling convention in the type if it's available in
15326 the die. Otherwise the calling convention remains set to
15327 the default value DW_CC_normal. */
15328 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15329 if (attr
!= nullptr
15330 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
15332 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15333 TYPE_CPLUS_CALLING_CONVENTION (type
)
15334 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
15337 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15338 if (attr
!= nullptr)
15340 if (attr
->form_is_constant ())
15341 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15344 struct dynamic_prop prop
;
15345 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
15346 cu
->per_cu
->addr_type ()))
15347 add_dyn_prop (DYN_PROP_BYTE_SIZE
, prop
, type
);
15348 TYPE_LENGTH (type
) = 0;
15353 TYPE_LENGTH (type
) = 0;
15356 maybe_set_alignment (cu
, die
, type
);
15358 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15360 /* ICC<14 does not output the required DW_AT_declaration on
15361 incomplete types, but gives them a size of zero. */
15362 TYPE_STUB (type
) = 1;
15365 TYPE_STUB_SUPPORTED (type
) = 1;
15367 if (die_is_declaration (die
, cu
))
15368 TYPE_STUB (type
) = 1;
15369 else if (attr
== NULL
&& die
->child
== NULL
15370 && producer_is_realview (cu
->producer
))
15371 /* RealView does not output the required DW_AT_declaration
15372 on incomplete types. */
15373 TYPE_STUB (type
) = 1;
15375 /* We need to add the type field to the die immediately so we don't
15376 infinitely recurse when dealing with pointers to the structure
15377 type within the structure itself. */
15378 set_die_type (die
, type
, cu
);
15380 /* set_die_type should be already done. */
15381 set_descriptive_type (type
, die
, cu
);
15386 static void handle_struct_member_die
15387 (struct die_info
*child_die
,
15389 struct field_info
*fi
,
15390 std::vector
<struct symbol
*> *template_args
,
15391 struct dwarf2_cu
*cu
);
15393 /* A helper for handle_struct_member_die that handles
15394 DW_TAG_variant_part. */
15397 handle_variant_part (struct die_info
*die
, struct type
*type
,
15398 struct field_info
*fi
,
15399 std::vector
<struct symbol
*> *template_args
,
15400 struct dwarf2_cu
*cu
)
15402 variant_part_builder
*new_part
;
15403 if (fi
->current_variant_part
== nullptr)
15405 fi
->variant_parts
.emplace_back ();
15406 new_part
= &fi
->variant_parts
.back ();
15408 else if (!fi
->current_variant_part
->processing_variant
)
15410 complaint (_("nested DW_TAG_variant_part seen "
15411 "- DIE at %s [in module %s]"),
15412 sect_offset_str (die
->sect_off
),
15413 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15418 variant_field
¤t
= fi
->current_variant_part
->variants
.back ();
15419 current
.variant_parts
.emplace_back ();
15420 new_part
= ¤t
.variant_parts
.back ();
15423 /* When we recurse, we want callees to add to this new variant
15425 scoped_restore save_current_variant_part
15426 = make_scoped_restore (&fi
->current_variant_part
, new_part
);
15428 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15431 /* It's a univariant form, an extension we support. */
15433 else if (discr
->form_is_ref ())
15435 struct dwarf2_cu
*target_cu
= cu
;
15436 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15438 new_part
->discriminant_offset
= target_die
->sect_off
;
15442 complaint (_("DW_AT_discr does not have DIE reference form"
15443 " - DIE at %s [in module %s]"),
15444 sect_offset_str (die
->sect_off
),
15445 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15448 for (die_info
*child_die
= die
->child
;
15450 child_die
= child_die
->sibling
)
15451 handle_struct_member_die (child_die
, type
, fi
, template_args
, cu
);
15454 /* A helper for handle_struct_member_die that handles
15458 handle_variant (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 if (fi
->current_variant_part
== nullptr)
15465 complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part "
15466 "- DIE at %s [in module %s]"),
15467 sect_offset_str (die
->sect_off
),
15468 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15471 if (fi
->current_variant_part
->processing_variant
)
15473 complaint (_("nested DW_TAG_variant seen "
15474 "- DIE at %s [in module %s]"),
15475 sect_offset_str (die
->sect_off
),
15476 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15480 scoped_restore save_processing_variant
15481 = make_scoped_restore (&fi
->current_variant_part
->processing_variant
,
15484 fi
->current_variant_part
->variants
.emplace_back ();
15485 variant_field
&variant
= fi
->current_variant_part
->variants
.back ();
15486 variant
.first_field
= fi
->fields
.size ();
15488 /* In a variant we want to get the discriminant and also add a
15489 field for our sole member child. */
15490 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr_value
, cu
);
15491 if (discr
== nullptr)
15493 discr
= dwarf2_attr (die
, DW_AT_discr_list
, cu
);
15494 if (discr
== nullptr || DW_BLOCK (discr
)->size
== 0)
15495 variant
.default_branch
= true;
15497 variant
.discr_list_data
= DW_BLOCK (discr
);
15500 variant
.discriminant_value
= DW_UNSND (discr
);
15502 for (die_info
*variant_child
= die
->child
;
15503 variant_child
!= NULL
;
15504 variant_child
= variant_child
->sibling
)
15505 handle_struct_member_die (variant_child
, type
, fi
, template_args
, cu
);
15507 variant
.last_field
= fi
->fields
.size ();
15510 /* A helper for process_structure_scope that handles a single member
15514 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15515 struct field_info
*fi
,
15516 std::vector
<struct symbol
*> *template_args
,
15517 struct dwarf2_cu
*cu
)
15519 if (child_die
->tag
== DW_TAG_member
15520 || child_die
->tag
== DW_TAG_variable
)
15522 /* NOTE: carlton/2002-11-05: A C++ static data member
15523 should be a DW_TAG_member that is a declaration, but
15524 all versions of G++ as of this writing (so through at
15525 least 3.2.1) incorrectly generate DW_TAG_variable
15526 tags for them instead. */
15527 dwarf2_add_field (fi
, child_die
, cu
);
15529 else if (child_die
->tag
== DW_TAG_subprogram
)
15531 /* Rust doesn't have member functions in the C++ sense.
15532 However, it does emit ordinary functions as children
15533 of a struct DIE. */
15534 if (cu
->language
== language_rust
)
15535 read_func_scope (child_die
, cu
);
15538 /* C++ member function. */
15539 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15542 else if (child_die
->tag
== DW_TAG_inheritance
)
15544 /* C++ base class field. */
15545 dwarf2_add_field (fi
, child_die
, cu
);
15547 else if (type_can_define_types (child_die
))
15548 dwarf2_add_type_defn (fi
, child_die
, cu
);
15549 else if (child_die
->tag
== DW_TAG_template_type_param
15550 || child_die
->tag
== DW_TAG_template_value_param
)
15552 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15555 template_args
->push_back (arg
);
15557 else if (child_die
->tag
== DW_TAG_variant_part
)
15558 handle_variant_part (child_die
, type
, fi
, template_args
, cu
);
15559 else if (child_die
->tag
== DW_TAG_variant
)
15560 handle_variant (child_die
, type
, fi
, template_args
, cu
);
15563 /* Finish creating a structure or union type, including filling in
15564 its members and creating a symbol for it. */
15567 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15569 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15570 struct die_info
*child_die
;
15573 type
= get_die_type (die
, cu
);
15575 type
= read_structure_type (die
, cu
);
15577 bool has_template_parameters
= false;
15578 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15580 struct field_info fi
;
15581 std::vector
<struct symbol
*> template_args
;
15583 child_die
= die
->child
;
15585 while (child_die
&& child_die
->tag
)
15587 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15588 child_die
= child_die
->sibling
;
15591 /* Attach template arguments to type. */
15592 if (!template_args
.empty ())
15594 has_template_parameters
= true;
15595 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15596 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15597 TYPE_TEMPLATE_ARGUMENTS (type
)
15598 = XOBNEWVEC (&objfile
->objfile_obstack
,
15600 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15601 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15602 template_args
.data (),
15603 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15604 * sizeof (struct symbol
*)));
15607 /* Attach fields and member functions to the type. */
15608 if (fi
.nfields () > 0)
15609 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15610 if (!fi
.fnfieldlists
.empty ())
15612 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15614 /* Get the type which refers to the base class (possibly this
15615 class itself) which contains the vtable pointer for the current
15616 class from the DW_AT_containing_type attribute. This use of
15617 DW_AT_containing_type is a GNU extension. */
15619 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15621 struct type
*t
= die_containing_type (die
, cu
);
15623 set_type_vptr_basetype (type
, t
);
15628 /* Our own class provides vtbl ptr. */
15629 for (i
= TYPE_NFIELDS (t
) - 1;
15630 i
>= TYPE_N_BASECLASSES (t
);
15633 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15635 if (is_vtable_name (fieldname
, cu
))
15637 set_type_vptr_fieldno (type
, i
);
15642 /* Complain if virtual function table field not found. */
15643 if (i
< TYPE_N_BASECLASSES (t
))
15644 complaint (_("virtual function table pointer "
15645 "not found when defining class '%s'"),
15646 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
15650 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15653 else if (cu
->producer
15654 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15656 /* The IBM XLC compiler does not provide direct indication
15657 of the containing type, but the vtable pointer is
15658 always named __vfp. */
15662 for (i
= TYPE_NFIELDS (type
) - 1;
15663 i
>= TYPE_N_BASECLASSES (type
);
15666 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15668 set_type_vptr_fieldno (type
, i
);
15669 set_type_vptr_basetype (type
, type
);
15676 /* Copy fi.typedef_field_list linked list elements content into the
15677 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15678 if (!fi
.typedef_field_list
.empty ())
15680 int count
= fi
.typedef_field_list
.size ();
15682 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15683 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15684 = ((struct decl_field
*)
15686 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15687 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15689 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15690 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15693 /* Copy fi.nested_types_list linked list elements content into the
15694 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15695 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15697 int count
= fi
.nested_types_list
.size ();
15699 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15700 TYPE_NESTED_TYPES_ARRAY (type
)
15701 = ((struct decl_field
*)
15702 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15703 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15705 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15706 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15710 quirk_gcc_member_function_pointer (type
, objfile
);
15711 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15712 cu
->rust_unions
.push_back (type
);
15714 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15715 snapshots) has been known to create a die giving a declaration
15716 for a class that has, as a child, a die giving a definition for a
15717 nested class. So we have to process our children even if the
15718 current die is a declaration. Normally, of course, a declaration
15719 won't have any children at all. */
15721 child_die
= die
->child
;
15723 while (child_die
!= NULL
&& child_die
->tag
)
15725 if (child_die
->tag
== DW_TAG_member
15726 || child_die
->tag
== DW_TAG_variable
15727 || child_die
->tag
== DW_TAG_inheritance
15728 || child_die
->tag
== DW_TAG_template_value_param
15729 || child_die
->tag
== DW_TAG_template_type_param
)
15734 process_die (child_die
, cu
);
15736 child_die
= child_die
->sibling
;
15739 /* Do not consider external references. According to the DWARF standard,
15740 these DIEs are identified by the fact that they have no byte_size
15741 attribute, and a declaration attribute. */
15742 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
15743 || !die_is_declaration (die
, cu
))
15745 struct symbol
*sym
= new_symbol (die
, type
, cu
);
15747 if (has_template_parameters
)
15749 struct symtab
*symtab
;
15750 if (sym
!= nullptr)
15751 symtab
= symbol_symtab (sym
);
15752 else if (cu
->line_header
!= nullptr)
15754 /* Any related symtab will do. */
15756 = cu
->line_header
->file_names ()[0].symtab
;
15761 complaint (_("could not find suitable "
15762 "symtab for template parameter"
15763 " - DIE at %s [in module %s]"),
15764 sect_offset_str (die
->sect_off
),
15765 objfile_name (objfile
));
15768 if (symtab
!= nullptr)
15770 /* Make sure that the symtab is set on the new symbols.
15771 Even though they don't appear in this symtab directly,
15772 other parts of gdb assume that symbols do, and this is
15773 reasonably true. */
15774 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
15775 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
15781 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
15782 update TYPE using some information only available in DIE's children. */
15785 update_enumeration_type_from_children (struct die_info
*die
,
15787 struct dwarf2_cu
*cu
)
15789 struct die_info
*child_die
;
15790 int unsigned_enum
= 1;
15793 auto_obstack obstack
;
15795 for (child_die
= die
->child
;
15796 child_die
!= NULL
&& child_die
->tag
;
15797 child_die
= child_die
->sibling
)
15799 struct attribute
*attr
;
15801 const gdb_byte
*bytes
;
15802 struct dwarf2_locexpr_baton
*baton
;
15805 if (child_die
->tag
!= DW_TAG_enumerator
)
15808 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
15812 name
= dwarf2_name (child_die
, cu
);
15814 name
= "<anonymous enumerator>";
15816 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
15817 &value
, &bytes
, &baton
);
15825 if (count_one_bits_ll (value
) >= 2)
15829 /* If we already know that the enum type is neither unsigned, nor
15830 a flag type, no need to look at the rest of the enumerates. */
15831 if (!unsigned_enum
&& !flag_enum
)
15836 TYPE_UNSIGNED (type
) = 1;
15838 TYPE_FLAG_ENUM (type
) = 1;
15841 /* Given a DW_AT_enumeration_type die, set its type. We do not
15842 complete the type's fields yet, or create any symbols. */
15844 static struct type
*
15845 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15847 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15849 struct attribute
*attr
;
15852 /* If the definition of this type lives in .debug_types, read that type.
15853 Don't follow DW_AT_specification though, that will take us back up
15854 the chain and we want to go down. */
15855 attr
= die
->attr (DW_AT_signature
);
15856 if (attr
!= nullptr)
15858 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15860 /* The type's CU may not be the same as CU.
15861 Ensure TYPE is recorded with CU in die_type_hash. */
15862 return set_die_type (die
, type
, cu
);
15865 type
= alloc_type (objfile
);
15867 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
15868 name
= dwarf2_full_name (NULL
, die
, cu
);
15870 TYPE_NAME (type
) = name
;
15872 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
15875 struct type
*underlying_type
= die_type (die
, cu
);
15877 TYPE_TARGET_TYPE (type
) = underlying_type
;
15880 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15881 if (attr
!= nullptr)
15883 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15887 TYPE_LENGTH (type
) = 0;
15890 maybe_set_alignment (cu
, die
, type
);
15892 /* The enumeration DIE can be incomplete. In Ada, any type can be
15893 declared as private in the package spec, and then defined only
15894 inside the package body. Such types are known as Taft Amendment
15895 Types. When another package uses such a type, an incomplete DIE
15896 may be generated by the compiler. */
15897 if (die_is_declaration (die
, cu
))
15898 TYPE_STUB (type
) = 1;
15900 /* Finish the creation of this type by using the enum's children.
15901 We must call this even when the underlying type has been provided
15902 so that we can determine if we're looking at a "flag" enum. */
15903 update_enumeration_type_from_children (die
, type
, cu
);
15905 /* If this type has an underlying type that is not a stub, then we
15906 may use its attributes. We always use the "unsigned" attribute
15907 in this situation, because ordinarily we guess whether the type
15908 is unsigned -- but the guess can be wrong and the underlying type
15909 can tell us the reality. However, we defer to a local size
15910 attribute if one exists, because this lets the compiler override
15911 the underlying type if needed. */
15912 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
15914 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
15915 underlying_type
= check_typedef (underlying_type
);
15916 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (underlying_type
);
15917 if (TYPE_LENGTH (type
) == 0)
15918 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
15919 if (TYPE_RAW_ALIGN (type
) == 0
15920 && TYPE_RAW_ALIGN (underlying_type
) != 0)
15921 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
15924 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
15926 return set_die_type (die
, type
, cu
);
15929 /* Given a pointer to a die which begins an enumeration, process all
15930 the dies that define the members of the enumeration, and create the
15931 symbol for the enumeration type.
15933 NOTE: We reverse the order of the element list. */
15936 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15938 struct type
*this_type
;
15940 this_type
= get_die_type (die
, cu
);
15941 if (this_type
== NULL
)
15942 this_type
= read_enumeration_type (die
, cu
);
15944 if (die
->child
!= NULL
)
15946 struct die_info
*child_die
;
15947 struct symbol
*sym
;
15948 std::vector
<struct field
> fields
;
15951 child_die
= die
->child
;
15952 while (child_die
&& child_die
->tag
)
15954 if (child_die
->tag
!= DW_TAG_enumerator
)
15956 process_die (child_die
, cu
);
15960 name
= dwarf2_name (child_die
, cu
);
15963 sym
= new_symbol (child_die
, this_type
, cu
);
15965 fields
.emplace_back ();
15966 struct field
&field
= fields
.back ();
15968 FIELD_NAME (field
) = sym
->linkage_name ();
15969 FIELD_TYPE (field
) = NULL
;
15970 SET_FIELD_ENUMVAL (field
, SYMBOL_VALUE (sym
));
15971 FIELD_BITSIZE (field
) = 0;
15975 child_die
= child_die
->sibling
;
15978 if (!fields
.empty ())
15980 TYPE_NFIELDS (this_type
) = fields
.size ();
15981 TYPE_FIELDS (this_type
) = (struct field
*)
15982 TYPE_ALLOC (this_type
, sizeof (struct field
) * fields
.size ());
15983 memcpy (TYPE_FIELDS (this_type
), fields
.data (),
15984 sizeof (struct field
) * fields
.size ());
15988 /* If we are reading an enum from a .debug_types unit, and the enum
15989 is a declaration, and the enum is not the signatured type in the
15990 unit, then we do not want to add a symbol for it. Adding a
15991 symbol would in some cases obscure the true definition of the
15992 enum, giving users an incomplete type when the definition is
15993 actually available. Note that we do not want to do this for all
15994 enums which are just declarations, because C++0x allows forward
15995 enum declarations. */
15996 if (cu
->per_cu
->is_debug_types
15997 && die_is_declaration (die
, cu
))
15999 struct signatured_type
*sig_type
;
16001 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16002 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16003 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16007 new_symbol (die
, this_type
, cu
);
16010 /* Extract all information from a DW_TAG_array_type DIE and put it in
16011 the DIE's type field. For now, this only handles one dimensional
16014 static struct type
*
16015 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16017 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16018 struct die_info
*child_die
;
16020 struct type
*element_type
, *range_type
, *index_type
;
16021 struct attribute
*attr
;
16023 struct dynamic_prop
*byte_stride_prop
= NULL
;
16024 unsigned int bit_stride
= 0;
16026 element_type
= die_type (die
, cu
);
16028 /* The die_type call above may have already set the type for this DIE. */
16029 type
= get_die_type (die
, cu
);
16033 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16037 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
16040 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16041 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16045 complaint (_("unable to read array DW_AT_byte_stride "
16046 " - DIE at %s [in module %s]"),
16047 sect_offset_str (die
->sect_off
),
16048 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16049 /* Ignore this attribute. We will likely not be able to print
16050 arrays of this type correctly, but there is little we can do
16051 to help if we cannot read the attribute's value. */
16052 byte_stride_prop
= NULL
;
16056 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16058 bit_stride
= DW_UNSND (attr
);
16060 /* Irix 6.2 native cc creates array types without children for
16061 arrays with unspecified length. */
16062 if (die
->child
== NULL
)
16064 index_type
= objfile_type (objfile
)->builtin_int
;
16065 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16066 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16067 byte_stride_prop
, bit_stride
);
16068 return set_die_type (die
, type
, cu
);
16071 std::vector
<struct type
*> range_types
;
16072 child_die
= die
->child
;
16073 while (child_die
&& child_die
->tag
)
16075 if (child_die
->tag
== DW_TAG_subrange_type
)
16077 struct type
*child_type
= read_type_die (child_die
, cu
);
16079 if (child_type
!= NULL
)
16081 /* The range type was succesfully read. Save it for the
16082 array type creation. */
16083 range_types
.push_back (child_type
);
16086 child_die
= child_die
->sibling
;
16089 /* Dwarf2 dimensions are output from left to right, create the
16090 necessary array types in backwards order. */
16092 type
= element_type
;
16094 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16098 while (i
< range_types
.size ())
16099 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16100 byte_stride_prop
, bit_stride
);
16104 size_t ndim
= range_types
.size ();
16106 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16107 byte_stride_prop
, bit_stride
);
16110 /* Understand Dwarf2 support for vector types (like they occur on
16111 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16112 array type. This is not part of the Dwarf2/3 standard yet, but a
16113 custom vendor extension. The main difference between a regular
16114 array and the vector variant is that vectors are passed by value
16116 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16117 if (attr
!= nullptr)
16118 make_vector_type (type
);
16120 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16121 implementation may choose to implement triple vectors using this
16123 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16124 if (attr
!= nullptr)
16126 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16127 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16129 complaint (_("DW_AT_byte_size for array type smaller "
16130 "than the total size of elements"));
16133 name
= dwarf2_name (die
, cu
);
16135 TYPE_NAME (type
) = name
;
16137 maybe_set_alignment (cu
, die
, type
);
16139 /* Install the type in the die. */
16140 set_die_type (die
, type
, cu
);
16142 /* set_die_type should be already done. */
16143 set_descriptive_type (type
, die
, cu
);
16148 static enum dwarf_array_dim_ordering
16149 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16151 struct attribute
*attr
;
16153 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16155 if (attr
!= nullptr)
16156 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16158 /* GNU F77 is a special case, as at 08/2004 array type info is the
16159 opposite order to the dwarf2 specification, but data is still
16160 laid out as per normal fortran.
16162 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16163 version checking. */
16165 if (cu
->language
== language_fortran
16166 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16168 return DW_ORD_row_major
;
16171 switch (cu
->language_defn
->la_array_ordering
)
16173 case array_column_major
:
16174 return DW_ORD_col_major
;
16175 case array_row_major
:
16177 return DW_ORD_row_major
;
16181 /* Extract all information from a DW_TAG_set_type DIE and put it in
16182 the DIE's type field. */
16184 static struct type
*
16185 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16187 struct type
*domain_type
, *set_type
;
16188 struct attribute
*attr
;
16190 domain_type
= die_type (die
, cu
);
16192 /* The die_type call above may have already set the type for this DIE. */
16193 set_type
= get_die_type (die
, cu
);
16197 set_type
= create_set_type (NULL
, domain_type
);
16199 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16200 if (attr
!= nullptr)
16201 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16203 maybe_set_alignment (cu
, die
, set_type
);
16205 return set_die_type (die
, set_type
, cu
);
16208 /* A helper for read_common_block that creates a locexpr baton.
16209 SYM is the symbol which we are marking as computed.
16210 COMMON_DIE is the DIE for the common block.
16211 COMMON_LOC is the location expression attribute for the common
16213 MEMBER_LOC is the location expression attribute for the particular
16214 member of the common block that we are processing.
16215 CU is the CU from which the above come. */
16218 mark_common_block_symbol_computed (struct symbol
*sym
,
16219 struct die_info
*common_die
,
16220 struct attribute
*common_loc
,
16221 struct attribute
*member_loc
,
16222 struct dwarf2_cu
*cu
)
16224 struct dwarf2_per_objfile
*dwarf2_per_objfile
16225 = cu
->per_cu
->dwarf2_per_objfile
;
16226 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16227 struct dwarf2_locexpr_baton
*baton
;
16229 unsigned int cu_off
;
16230 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
16231 LONGEST offset
= 0;
16233 gdb_assert (common_loc
&& member_loc
);
16234 gdb_assert (common_loc
->form_is_block ());
16235 gdb_assert (member_loc
->form_is_block ()
16236 || member_loc
->form_is_constant ());
16238 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16239 baton
->per_cu
= cu
->per_cu
;
16240 gdb_assert (baton
->per_cu
);
16242 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16244 if (member_loc
->form_is_constant ())
16246 offset
= member_loc
->constant_value (0);
16247 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16250 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16252 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16255 *ptr
++ = DW_OP_call4
;
16256 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16257 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16260 if (member_loc
->form_is_constant ())
16262 *ptr
++ = DW_OP_addr
;
16263 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16264 ptr
+= cu
->header
.addr_size
;
16268 /* We have to copy the data here, because DW_OP_call4 will only
16269 use a DW_AT_location attribute. */
16270 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16271 ptr
+= DW_BLOCK (member_loc
)->size
;
16274 *ptr
++ = DW_OP_plus
;
16275 gdb_assert (ptr
- baton
->data
== baton
->size
);
16277 SYMBOL_LOCATION_BATON (sym
) = baton
;
16278 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16281 /* Create appropriate locally-scoped variables for all the
16282 DW_TAG_common_block entries. Also create a struct common_block
16283 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16284 is used to separate the common blocks name namespace from regular
16288 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16290 struct attribute
*attr
;
16292 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16293 if (attr
!= nullptr)
16295 /* Support the .debug_loc offsets. */
16296 if (attr
->form_is_block ())
16300 else if (attr
->form_is_section_offset ())
16302 dwarf2_complex_location_expr_complaint ();
16307 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16308 "common block member");
16313 if (die
->child
!= NULL
)
16315 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16316 struct die_info
*child_die
;
16317 size_t n_entries
= 0, size
;
16318 struct common_block
*common_block
;
16319 struct symbol
*sym
;
16321 for (child_die
= die
->child
;
16322 child_die
&& child_die
->tag
;
16323 child_die
= child_die
->sibling
)
16326 size
= (sizeof (struct common_block
)
16327 + (n_entries
- 1) * sizeof (struct symbol
*));
16329 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16331 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16332 common_block
->n_entries
= 0;
16334 for (child_die
= die
->child
;
16335 child_die
&& child_die
->tag
;
16336 child_die
= child_die
->sibling
)
16338 /* Create the symbol in the DW_TAG_common_block block in the current
16340 sym
= new_symbol (child_die
, NULL
, cu
);
16343 struct attribute
*member_loc
;
16345 common_block
->contents
[common_block
->n_entries
++] = sym
;
16347 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16351 /* GDB has handled this for a long time, but it is
16352 not specified by DWARF. It seems to have been
16353 emitted by gfortran at least as recently as:
16354 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16355 complaint (_("Variable in common block has "
16356 "DW_AT_data_member_location "
16357 "- DIE at %s [in module %s]"),
16358 sect_offset_str (child_die
->sect_off
),
16359 objfile_name (objfile
));
16361 if (member_loc
->form_is_section_offset ())
16362 dwarf2_complex_location_expr_complaint ();
16363 else if (member_loc
->form_is_constant ()
16364 || member_loc
->form_is_block ())
16366 if (attr
!= nullptr)
16367 mark_common_block_symbol_computed (sym
, die
, attr
,
16371 dwarf2_complex_location_expr_complaint ();
16376 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16377 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16381 /* Create a type for a C++ namespace. */
16383 static struct type
*
16384 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16386 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16387 const char *previous_prefix
, *name
;
16391 /* For extensions, reuse the type of the original namespace. */
16392 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16394 struct die_info
*ext_die
;
16395 struct dwarf2_cu
*ext_cu
= cu
;
16397 ext_die
= dwarf2_extension (die
, &ext_cu
);
16398 type
= read_type_die (ext_die
, ext_cu
);
16400 /* EXT_CU may not be the same as CU.
16401 Ensure TYPE is recorded with CU in die_type_hash. */
16402 return set_die_type (die
, type
, cu
);
16405 name
= namespace_name (die
, &is_anonymous
, cu
);
16407 /* Now build the name of the current namespace. */
16409 previous_prefix
= determine_prefix (die
, cu
);
16410 if (previous_prefix
[0] != '\0')
16411 name
= typename_concat (&objfile
->objfile_obstack
,
16412 previous_prefix
, name
, 0, cu
);
16414 /* Create the type. */
16415 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16417 return set_die_type (die
, type
, cu
);
16420 /* Read a namespace scope. */
16423 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16425 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16428 /* Add a symbol associated to this if we haven't seen the namespace
16429 before. Also, add a using directive if it's an anonymous
16432 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16436 type
= read_type_die (die
, cu
);
16437 new_symbol (die
, type
, cu
);
16439 namespace_name (die
, &is_anonymous
, cu
);
16442 const char *previous_prefix
= determine_prefix (die
, cu
);
16444 std::vector
<const char *> excludes
;
16445 add_using_directive (using_directives (cu
),
16446 previous_prefix
, TYPE_NAME (type
), NULL
,
16447 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16451 if (die
->child
!= NULL
)
16453 struct die_info
*child_die
= die
->child
;
16455 while (child_die
&& child_die
->tag
)
16457 process_die (child_die
, cu
);
16458 child_die
= child_die
->sibling
;
16463 /* Read a Fortran module as type. This DIE can be only a declaration used for
16464 imported module. Still we need that type as local Fortran "use ... only"
16465 declaration imports depend on the created type in determine_prefix. */
16467 static struct type
*
16468 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16470 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16471 const char *module_name
;
16474 module_name
= dwarf2_name (die
, cu
);
16475 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16477 return set_die_type (die
, type
, cu
);
16480 /* Read a Fortran module. */
16483 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16485 struct die_info
*child_die
= die
->child
;
16488 type
= read_type_die (die
, cu
);
16489 new_symbol (die
, type
, cu
);
16491 while (child_die
&& child_die
->tag
)
16493 process_die (child_die
, cu
);
16494 child_die
= child_die
->sibling
;
16498 /* Return the name of the namespace represented by DIE. Set
16499 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16502 static const char *
16503 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16505 struct die_info
*current_die
;
16506 const char *name
= NULL
;
16508 /* Loop through the extensions until we find a name. */
16510 for (current_die
= die
;
16511 current_die
!= NULL
;
16512 current_die
= dwarf2_extension (die
, &cu
))
16514 /* We don't use dwarf2_name here so that we can detect the absence
16515 of a name -> anonymous namespace. */
16516 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16522 /* Is it an anonymous namespace? */
16524 *is_anonymous
= (name
== NULL
);
16526 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16531 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16532 the user defined type vector. */
16534 static struct type
*
16535 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16537 struct gdbarch
*gdbarch
16538 = cu
->per_cu
->dwarf2_per_objfile
->objfile
->arch ();
16539 struct comp_unit_head
*cu_header
= &cu
->header
;
16541 struct attribute
*attr_byte_size
;
16542 struct attribute
*attr_address_class
;
16543 int byte_size
, addr_class
;
16544 struct type
*target_type
;
16546 target_type
= die_type (die
, cu
);
16548 /* The die_type call above may have already set the type for this DIE. */
16549 type
= get_die_type (die
, cu
);
16553 type
= lookup_pointer_type (target_type
);
16555 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16556 if (attr_byte_size
)
16557 byte_size
= DW_UNSND (attr_byte_size
);
16559 byte_size
= cu_header
->addr_size
;
16561 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16562 if (attr_address_class
)
16563 addr_class
= DW_UNSND (attr_address_class
);
16565 addr_class
= DW_ADDR_none
;
16567 ULONGEST alignment
= get_alignment (cu
, die
);
16569 /* If the pointer size, alignment, or address class is different
16570 than the default, create a type variant marked as such and set
16571 the length accordingly. */
16572 if (TYPE_LENGTH (type
) != byte_size
16573 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16574 && alignment
!= TYPE_RAW_ALIGN (type
))
16575 || addr_class
!= DW_ADDR_none
)
16577 if (gdbarch_address_class_type_flags_p (gdbarch
))
16581 type_flags
= gdbarch_address_class_type_flags
16582 (gdbarch
, byte_size
, addr_class
);
16583 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16585 type
= make_type_with_address_space (type
, type_flags
);
16587 else if (TYPE_LENGTH (type
) != byte_size
)
16589 complaint (_("invalid pointer size %d"), byte_size
);
16591 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16593 complaint (_("Invalid DW_AT_alignment"
16594 " - DIE at %s [in module %s]"),
16595 sect_offset_str (die
->sect_off
),
16596 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16600 /* Should we also complain about unhandled address classes? */
16604 TYPE_LENGTH (type
) = byte_size
;
16605 set_type_align (type
, alignment
);
16606 return set_die_type (die
, type
, cu
);
16609 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16610 the user defined type vector. */
16612 static struct type
*
16613 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16616 struct type
*to_type
;
16617 struct type
*domain
;
16619 to_type
= die_type (die
, cu
);
16620 domain
= die_containing_type (die
, cu
);
16622 /* The calls above may have already set the type for this DIE. */
16623 type
= get_die_type (die
, cu
);
16627 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16628 type
= lookup_methodptr_type (to_type
);
16629 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16631 struct type
*new_type
16632 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16634 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16635 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16636 TYPE_VARARGS (to_type
));
16637 type
= lookup_methodptr_type (new_type
);
16640 type
= lookup_memberptr_type (to_type
, domain
);
16642 return set_die_type (die
, type
, cu
);
16645 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16646 the user defined type vector. */
16648 static struct type
*
16649 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16650 enum type_code refcode
)
16652 struct comp_unit_head
*cu_header
= &cu
->header
;
16653 struct type
*type
, *target_type
;
16654 struct attribute
*attr
;
16656 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16658 target_type
= die_type (die
, cu
);
16660 /* The die_type call above may have already set the type for this DIE. */
16661 type
= get_die_type (die
, cu
);
16665 type
= lookup_reference_type (target_type
, refcode
);
16666 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16667 if (attr
!= nullptr)
16669 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16673 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16675 maybe_set_alignment (cu
, die
, type
);
16676 return set_die_type (die
, type
, cu
);
16679 /* Add the given cv-qualifiers to the element type of the array. GCC
16680 outputs DWARF type qualifiers that apply to an array, not the
16681 element type. But GDB relies on the array element type to carry
16682 the cv-qualifiers. This mimics section 6.7.3 of the C99
16685 static struct type
*
16686 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16687 struct type
*base_type
, int cnst
, int voltl
)
16689 struct type
*el_type
, *inner_array
;
16691 base_type
= copy_type (base_type
);
16692 inner_array
= base_type
;
16694 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
16696 TYPE_TARGET_TYPE (inner_array
) =
16697 copy_type (TYPE_TARGET_TYPE (inner_array
));
16698 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16701 el_type
= TYPE_TARGET_TYPE (inner_array
);
16702 cnst
|= TYPE_CONST (el_type
);
16703 voltl
|= TYPE_VOLATILE (el_type
);
16704 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16706 return set_die_type (die
, base_type
, cu
);
16709 static struct type
*
16710 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16712 struct type
*base_type
, *cv_type
;
16714 base_type
= die_type (die
, cu
);
16716 /* The die_type call above may have already set the type for this DIE. */
16717 cv_type
= get_die_type (die
, cu
);
16721 /* In case the const qualifier is applied to an array type, the element type
16722 is so qualified, not the array type (section 6.7.3 of C99). */
16723 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16724 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16726 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16727 return set_die_type (die
, cv_type
, cu
);
16730 static struct type
*
16731 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16733 struct type
*base_type
, *cv_type
;
16735 base_type
= die_type (die
, cu
);
16737 /* The die_type call above may have already set the type for this DIE. */
16738 cv_type
= get_die_type (die
, cu
);
16742 /* In case the volatile qualifier is applied to an array type, the
16743 element type is so qualified, not the array type (section 6.7.3
16745 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16746 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16748 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16749 return set_die_type (die
, cv_type
, cu
);
16752 /* Handle DW_TAG_restrict_type. */
16754 static struct type
*
16755 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16757 struct type
*base_type
, *cv_type
;
16759 base_type
= die_type (die
, cu
);
16761 /* The die_type call above may have already set the type for this DIE. */
16762 cv_type
= get_die_type (die
, cu
);
16766 cv_type
= make_restrict_type (base_type
);
16767 return set_die_type (die
, cv_type
, cu
);
16770 /* Handle DW_TAG_atomic_type. */
16772 static struct type
*
16773 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16775 struct type
*base_type
, *cv_type
;
16777 base_type
= die_type (die
, cu
);
16779 /* The die_type call above may have already set the type for this DIE. */
16780 cv_type
= get_die_type (die
, cu
);
16784 cv_type
= make_atomic_type (base_type
);
16785 return set_die_type (die
, cv_type
, cu
);
16788 /* Extract all information from a DW_TAG_string_type DIE and add to
16789 the user defined type vector. It isn't really a user defined type,
16790 but it behaves like one, with other DIE's using an AT_user_def_type
16791 attribute to reference it. */
16793 static struct type
*
16794 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16796 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16797 struct gdbarch
*gdbarch
= objfile
->arch ();
16798 struct type
*type
, *range_type
, *index_type
, *char_type
;
16799 struct attribute
*attr
;
16800 struct dynamic_prop prop
;
16801 bool length_is_constant
= true;
16804 /* There are a couple of places where bit sizes might be made use of
16805 when parsing a DW_TAG_string_type, however, no producer that we know
16806 of make use of these. Handling bit sizes that are a multiple of the
16807 byte size is easy enough, but what about other bit sizes? Lets deal
16808 with that problem when we have to. Warn about these attributes being
16809 unsupported, then parse the type and ignore them like we always
16811 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
16812 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
16814 static bool warning_printed
= false;
16815 if (!warning_printed
)
16817 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
16818 "currently supported on DW_TAG_string_type."));
16819 warning_printed
= true;
16823 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
16824 if (attr
!= nullptr && !attr
->form_is_constant ())
16826 /* The string length describes the location at which the length of
16827 the string can be found. The size of the length field can be
16828 specified with one of the attributes below. */
16829 struct type
*prop_type
;
16830 struct attribute
*len
16831 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
16832 if (len
== nullptr)
16833 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16834 if (len
!= nullptr && len
->form_is_constant ())
16836 /* Pass 0 as the default as we know this attribute is constant
16837 and the default value will not be returned. */
16838 LONGEST sz
= len
->constant_value (0);
16839 prop_type
= cu
->per_cu
->int_type (sz
, true);
16843 /* If the size is not specified then we assume it is the size of
16844 an address on this target. */
16845 prop_type
= cu
->per_cu
->addr_sized_int_type (true);
16848 /* Convert the attribute into a dynamic property. */
16849 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
16852 length_is_constant
= false;
16854 else if (attr
!= nullptr)
16856 /* This DW_AT_string_length just contains the length with no
16857 indirection. There's no need to create a dynamic property in this
16858 case. Pass 0 for the default value as we know it will not be
16859 returned in this case. */
16860 length
= attr
->constant_value (0);
16862 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
16864 /* We don't currently support non-constant byte sizes for strings. */
16865 length
= attr
->constant_value (1);
16869 /* Use 1 as a fallback length if we have nothing else. */
16873 index_type
= objfile_type (objfile
)->builtin_int
;
16874 if (length_is_constant
)
16875 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
16878 struct dynamic_prop low_bound
;
16880 low_bound
.kind
= PROP_CONST
;
16881 low_bound
.data
.const_val
= 1;
16882 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
16884 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
16885 type
= create_string_type (NULL
, char_type
, range_type
);
16887 return set_die_type (die
, type
, cu
);
16890 /* Assuming that DIE corresponds to a function, returns nonzero
16891 if the function is prototyped. */
16894 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
16896 struct attribute
*attr
;
16898 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
16899 if (attr
&& (DW_UNSND (attr
) != 0))
16902 /* The DWARF standard implies that the DW_AT_prototyped attribute
16903 is only meaningful for C, but the concept also extends to other
16904 languages that allow unprototyped functions (Eg: Objective C).
16905 For all other languages, assume that functions are always
16907 if (cu
->language
!= language_c
16908 && cu
->language
!= language_objc
16909 && cu
->language
!= language_opencl
)
16912 /* RealView does not emit DW_AT_prototyped. We can not distinguish
16913 prototyped and unprototyped functions; default to prototyped,
16914 since that is more common in modern code (and RealView warns
16915 about unprototyped functions). */
16916 if (producer_is_realview (cu
->producer
))
16922 /* Handle DIES due to C code like:
16926 int (*funcp)(int a, long l);
16930 ('funcp' generates a DW_TAG_subroutine_type DIE). */
16932 static struct type
*
16933 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16935 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16936 struct type
*type
; /* Type that this function returns. */
16937 struct type
*ftype
; /* Function that returns above type. */
16938 struct attribute
*attr
;
16940 type
= die_type (die
, cu
);
16942 /* The die_type call above may have already set the type for this DIE. */
16943 ftype
= get_die_type (die
, cu
);
16947 ftype
= lookup_function_type (type
);
16949 if (prototyped_function_p (die
, cu
))
16950 TYPE_PROTOTYPED (ftype
) = 1;
16952 /* Store the calling convention in the type if it's available in
16953 the subroutine die. Otherwise set the calling convention to
16954 the default value DW_CC_normal. */
16955 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
16956 if (attr
!= nullptr
16957 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
16958 TYPE_CALLING_CONVENTION (ftype
)
16959 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
16960 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
16961 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
16963 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
16965 /* Record whether the function returns normally to its caller or not
16966 if the DWARF producer set that information. */
16967 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
16968 if (attr
&& (DW_UNSND (attr
) != 0))
16969 TYPE_NO_RETURN (ftype
) = 1;
16971 /* We need to add the subroutine type to the die immediately so
16972 we don't infinitely recurse when dealing with parameters
16973 declared as the same subroutine type. */
16974 set_die_type (die
, ftype
, cu
);
16976 if (die
->child
!= NULL
)
16978 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
16979 struct die_info
*child_die
;
16980 int nparams
, iparams
;
16982 /* Count the number of parameters.
16983 FIXME: GDB currently ignores vararg functions, but knows about
16984 vararg member functions. */
16986 child_die
= die
->child
;
16987 while (child_die
&& child_die
->tag
)
16989 if (child_die
->tag
== DW_TAG_formal_parameter
)
16991 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
16992 TYPE_VARARGS (ftype
) = 1;
16993 child_die
= child_die
->sibling
;
16996 /* Allocate storage for parameters and fill them in. */
16997 TYPE_NFIELDS (ftype
) = nparams
;
16998 TYPE_FIELDS (ftype
) = (struct field
*)
16999 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17001 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17002 even if we error out during the parameters reading below. */
17003 for (iparams
= 0; iparams
< nparams
; iparams
++)
17004 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17007 child_die
= die
->child
;
17008 while (child_die
&& child_die
->tag
)
17010 if (child_die
->tag
== DW_TAG_formal_parameter
)
17012 struct type
*arg_type
;
17014 /* DWARF version 2 has no clean way to discern C++
17015 static and non-static member functions. G++ helps
17016 GDB by marking the first parameter for non-static
17017 member functions (which is the this pointer) as
17018 artificial. We pass this information to
17019 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17021 DWARF version 3 added DW_AT_object_pointer, which GCC
17022 4.5 does not yet generate. */
17023 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17024 if (attr
!= nullptr)
17025 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17027 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17028 arg_type
= die_type (child_die
, cu
);
17030 /* RealView does not mark THIS as const, which the testsuite
17031 expects. GCC marks THIS as const in method definitions,
17032 but not in the class specifications (GCC PR 43053). */
17033 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17034 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17037 struct dwarf2_cu
*arg_cu
= cu
;
17038 const char *name
= dwarf2_name (child_die
, cu
);
17040 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17041 if (attr
!= nullptr)
17043 /* If the compiler emits this, use it. */
17044 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17047 else if (name
&& strcmp (name
, "this") == 0)
17048 /* Function definitions will have the argument names. */
17050 else if (name
== NULL
&& iparams
== 0)
17051 /* Declarations may not have the names, so like
17052 elsewhere in GDB, assume an artificial first
17053 argument is "this". */
17057 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17061 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17064 child_die
= child_die
->sibling
;
17071 static struct type
*
17072 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17074 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17075 const char *name
= NULL
;
17076 struct type
*this_type
, *target_type
;
17078 name
= dwarf2_full_name (NULL
, die
, cu
);
17079 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17080 TYPE_TARGET_STUB (this_type
) = 1;
17081 set_die_type (die
, this_type
, cu
);
17082 target_type
= die_type (die
, cu
);
17083 if (target_type
!= this_type
)
17084 TYPE_TARGET_TYPE (this_type
) = target_type
;
17087 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17088 spec and cause infinite loops in GDB. */
17089 complaint (_("Self-referential DW_TAG_typedef "
17090 "- DIE at %s [in module %s]"),
17091 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17092 TYPE_TARGET_TYPE (this_type
) = NULL
;
17096 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
17097 anonymous typedefs, which is, strictly speaking, invalid DWARF.
17098 Handle these by just returning the target type, rather than
17099 constructing an anonymous typedef type and trying to handle this
17101 set_die_type (die
, target_type
, cu
);
17102 return target_type
;
17107 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17108 (which may be different from NAME) to the architecture back-end to allow
17109 it to guess the correct format if necessary. */
17111 static struct type
*
17112 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17113 const char *name_hint
, enum bfd_endian byte_order
)
17115 struct gdbarch
*gdbarch
= objfile
->arch ();
17116 const struct floatformat
**format
;
17119 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17121 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
17123 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17128 /* Allocate an integer type of size BITS and name NAME. */
17130 static struct type
*
17131 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17132 int bits
, int unsigned_p
, const char *name
)
17136 /* Versions of Intel's C Compiler generate an integer type called "void"
17137 instead of using DW_TAG_unspecified_type. This has been seen on
17138 at least versions 14, 17, and 18. */
17139 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17140 && strcmp (name
, "void") == 0)
17141 type
= objfile_type (objfile
)->builtin_void
;
17143 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17148 /* Initialise and return a floating point type of size BITS suitable for
17149 use as a component of a complex number. The NAME_HINT is passed through
17150 when initialising the floating point type and is the name of the complex
17153 As DWARF doesn't currently provide an explicit name for the components
17154 of a complex number, but it can be helpful to have these components
17155 named, we try to select a suitable name based on the size of the
17157 static struct type
*
17158 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17159 struct objfile
*objfile
,
17160 int bits
, const char *name_hint
,
17161 enum bfd_endian byte_order
)
17163 gdbarch
*gdbarch
= objfile
->arch ();
17164 struct type
*tt
= nullptr;
17166 /* Try to find a suitable floating point builtin type of size BITS.
17167 We're going to use the name of this type as the name for the complex
17168 target type that we are about to create. */
17169 switch (cu
->language
)
17171 case language_fortran
:
17175 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17178 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17180 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17182 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17190 tt
= builtin_type (gdbarch
)->builtin_float
;
17193 tt
= builtin_type (gdbarch
)->builtin_double
;
17195 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17197 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17203 /* If the type we found doesn't match the size we were looking for, then
17204 pretend we didn't find a type at all, the complex target type we
17205 create will then be nameless. */
17206 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17209 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
17210 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
17213 /* Find a representation of a given base type and install
17214 it in the TYPE field of the die. */
17216 static struct type
*
17217 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17219 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17221 struct attribute
*attr
;
17222 int encoding
= 0, bits
= 0;
17226 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17227 if (attr
!= nullptr)
17228 encoding
= DW_UNSND (attr
);
17229 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17230 if (attr
!= nullptr)
17231 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17232 name
= dwarf2_name (die
, cu
);
17234 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17236 arch
= objfile
->arch ();
17237 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
17239 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17242 int endianity
= DW_UNSND (attr
);
17247 byte_order
= BFD_ENDIAN_BIG
;
17249 case DW_END_little
:
17250 byte_order
= BFD_ENDIAN_LITTLE
;
17253 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
17260 case DW_ATE_address
:
17261 /* Turn DW_ATE_address into a void * pointer. */
17262 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17263 type
= init_pointer_type (objfile
, bits
, name
, type
);
17265 case DW_ATE_boolean
:
17266 type
= init_boolean_type (objfile
, bits
, 1, name
);
17268 case DW_ATE_complex_float
:
17269 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
17271 if (TYPE_CODE (type
) == TYPE_CODE_ERROR
)
17273 if (name
== nullptr)
17275 struct obstack
*obstack
17276 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17277 name
= obconcat (obstack
, "_Complex ", TYPE_NAME (type
),
17280 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17283 type
= init_complex_type (name
, type
);
17285 case DW_ATE_decimal_float
:
17286 type
= init_decfloat_type (objfile
, bits
, name
);
17289 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
17291 case DW_ATE_signed
:
17292 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17294 case DW_ATE_unsigned
:
17295 if (cu
->language
== language_fortran
17297 && startswith (name
, "character("))
17298 type
= init_character_type (objfile
, bits
, 1, name
);
17300 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17302 case DW_ATE_signed_char
:
17303 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17304 || cu
->language
== language_pascal
17305 || cu
->language
== language_fortran
)
17306 type
= init_character_type (objfile
, bits
, 0, name
);
17308 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17310 case DW_ATE_unsigned_char
:
17311 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17312 || cu
->language
== language_pascal
17313 || cu
->language
== language_fortran
17314 || cu
->language
== language_rust
)
17315 type
= init_character_type (objfile
, bits
, 1, name
);
17317 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17322 type
= builtin_type (arch
)->builtin_char16
;
17323 else if (bits
== 32)
17324 type
= builtin_type (arch
)->builtin_char32
;
17327 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17329 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17331 return set_die_type (die
, type
, cu
);
17336 complaint (_("unsupported DW_AT_encoding: '%s'"),
17337 dwarf_type_encoding_name (encoding
));
17338 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17342 if (name
&& strcmp (name
, "char") == 0)
17343 TYPE_NOSIGN (type
) = 1;
17345 maybe_set_alignment (cu
, die
, type
);
17347 TYPE_ENDIANITY_NOT_DEFAULT (type
) = gdbarch_byte_order (arch
) != byte_order
;
17349 return set_die_type (die
, type
, cu
);
17352 /* Parse dwarf attribute if it's a block, reference or constant and put the
17353 resulting value of the attribute into struct bound_prop.
17354 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17357 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17358 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17359 struct type
*default_type
)
17361 struct dwarf2_property_baton
*baton
;
17362 struct obstack
*obstack
17363 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17365 gdb_assert (default_type
!= NULL
);
17367 if (attr
== NULL
|| prop
== NULL
)
17370 if (attr
->form_is_block ())
17372 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17373 baton
->property_type
= default_type
;
17374 baton
->locexpr
.per_cu
= cu
->per_cu
;
17375 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17376 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17377 switch (attr
->name
)
17379 case DW_AT_string_length
:
17380 baton
->locexpr
.is_reference
= true;
17383 baton
->locexpr
.is_reference
= false;
17386 prop
->data
.baton
= baton
;
17387 prop
->kind
= PROP_LOCEXPR
;
17388 gdb_assert (prop
->data
.baton
!= NULL
);
17390 else if (attr
->form_is_ref ())
17392 struct dwarf2_cu
*target_cu
= cu
;
17393 struct die_info
*target_die
;
17394 struct attribute
*target_attr
;
17396 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17397 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17398 if (target_attr
== NULL
)
17399 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17401 if (target_attr
== NULL
)
17404 switch (target_attr
->name
)
17406 case DW_AT_location
:
17407 if (target_attr
->form_is_section_offset ())
17409 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17410 baton
->property_type
= die_type (target_die
, target_cu
);
17411 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17412 prop
->data
.baton
= baton
;
17413 prop
->kind
= PROP_LOCLIST
;
17414 gdb_assert (prop
->data
.baton
!= NULL
);
17416 else if (target_attr
->form_is_block ())
17418 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17419 baton
->property_type
= die_type (target_die
, target_cu
);
17420 baton
->locexpr
.per_cu
= cu
->per_cu
;
17421 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17422 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17423 baton
->locexpr
.is_reference
= true;
17424 prop
->data
.baton
= baton
;
17425 prop
->kind
= PROP_LOCEXPR
;
17426 gdb_assert (prop
->data
.baton
!= NULL
);
17430 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17431 "dynamic property");
17435 case DW_AT_data_member_location
:
17439 if (!handle_data_member_location (target_die
, target_cu
,
17443 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17444 baton
->property_type
= read_type_die (target_die
->parent
,
17446 baton
->offset_info
.offset
= offset
;
17447 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17448 prop
->data
.baton
= baton
;
17449 prop
->kind
= PROP_ADDR_OFFSET
;
17454 else if (attr
->form_is_constant ())
17456 prop
->data
.const_val
= attr
->constant_value (0);
17457 prop
->kind
= PROP_CONST
;
17461 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17462 dwarf2_name (die
, cu
));
17472 dwarf2_per_cu_data::int_type (int size_in_bytes
, bool unsigned_p
) const
17474 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17475 struct type
*int_type
;
17477 /* Helper macro to examine the various builtin types. */
17478 #define TRY_TYPE(F) \
17479 int_type = (unsigned_p \
17480 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17481 : objfile_type (objfile)->builtin_ ## F); \
17482 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
17489 TRY_TYPE (long_long
);
17493 gdb_assert_not_reached ("unable to find suitable integer type");
17499 dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p
) const
17501 int addr_size
= this->addr_size ();
17502 return int_type (addr_size
, unsigned_p
);
17505 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17506 present (which is valid) then compute the default type based on the
17507 compilation units address size. */
17509 static struct type
*
17510 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17512 struct type
*index_type
= die_type (die
, cu
);
17514 /* Dwarf-2 specifications explicitly allows to create subrange types
17515 without specifying a base type.
17516 In that case, the base type must be set to the type of
17517 the lower bound, upper bound or count, in that order, if any of these
17518 three attributes references an object that has a type.
17519 If no base type is found, the Dwarf-2 specifications say that
17520 a signed integer type of size equal to the size of an address should
17522 For the following C code: `extern char gdb_int [];'
17523 GCC produces an empty range DIE.
17524 FIXME: muller/2010-05-28: Possible references to object for low bound,
17525 high bound or count are not yet handled by this code. */
17526 if (TYPE_CODE (index_type
) == TYPE_CODE_VOID
)
17527 index_type
= cu
->per_cu
->addr_sized_int_type (false);
17532 /* Read the given DW_AT_subrange DIE. */
17534 static struct type
*
17535 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17537 struct type
*base_type
, *orig_base_type
;
17538 struct type
*range_type
;
17539 struct attribute
*attr
;
17540 struct dynamic_prop low
, high
;
17541 int low_default_is_valid
;
17542 int high_bound_is_count
= 0;
17544 ULONGEST negative_mask
;
17546 orig_base_type
= read_subrange_index_type (die
, cu
);
17548 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17549 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17550 creating the range type, but we use the result of check_typedef
17551 when examining properties of the type. */
17552 base_type
= check_typedef (orig_base_type
);
17554 /* The die_type call above may have already set the type for this DIE. */
17555 range_type
= get_die_type (die
, cu
);
17559 low
.kind
= PROP_CONST
;
17560 high
.kind
= PROP_CONST
;
17561 high
.data
.const_val
= 0;
17563 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17564 omitting DW_AT_lower_bound. */
17565 switch (cu
->language
)
17568 case language_cplus
:
17569 low
.data
.const_val
= 0;
17570 low_default_is_valid
= 1;
17572 case language_fortran
:
17573 low
.data
.const_val
= 1;
17574 low_default_is_valid
= 1;
17577 case language_objc
:
17578 case language_rust
:
17579 low
.data
.const_val
= 0;
17580 low_default_is_valid
= (cu
->header
.version
>= 4);
17584 case language_pascal
:
17585 low
.data
.const_val
= 1;
17586 low_default_is_valid
= (cu
->header
.version
>= 4);
17589 low
.data
.const_val
= 0;
17590 low_default_is_valid
= 0;
17594 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17595 if (attr
!= nullptr)
17596 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17597 else if (!low_default_is_valid
)
17598 complaint (_("Missing DW_AT_lower_bound "
17599 "- DIE at %s [in module %s]"),
17600 sect_offset_str (die
->sect_off
),
17601 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17603 struct attribute
*attr_ub
, *attr_count
;
17604 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17605 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17607 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17608 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17610 /* If bounds are constant do the final calculation here. */
17611 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17612 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17614 high_bound_is_count
= 1;
17618 if (attr_ub
!= NULL
)
17619 complaint (_("Unresolved DW_AT_upper_bound "
17620 "- DIE at %s [in module %s]"),
17621 sect_offset_str (die
->sect_off
),
17622 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17623 if (attr_count
!= NULL
)
17624 complaint (_("Unresolved DW_AT_count "
17625 "- DIE at %s [in module %s]"),
17626 sect_offset_str (die
->sect_off
),
17627 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17632 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17633 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
17634 bias
= bias_attr
->constant_value (0);
17636 /* Normally, the DWARF producers are expected to use a signed
17637 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17638 But this is unfortunately not always the case, as witnessed
17639 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17640 is used instead. To work around that ambiguity, we treat
17641 the bounds as signed, and thus sign-extend their values, when
17642 the base type is signed. */
17644 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17645 if (low
.kind
== PROP_CONST
17646 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17647 low
.data
.const_val
|= negative_mask
;
17648 if (high
.kind
== PROP_CONST
17649 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17650 high
.data
.const_val
|= negative_mask
;
17652 /* Check for bit and byte strides. */
17653 struct dynamic_prop byte_stride_prop
;
17654 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17655 if (attr_byte_stride
!= nullptr)
17657 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17658 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
17662 struct dynamic_prop bit_stride_prop
;
17663 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17664 if (attr_bit_stride
!= nullptr)
17666 /* It only makes sense to have either a bit or byte stride. */
17667 if (attr_byte_stride
!= nullptr)
17669 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
17670 "- DIE at %s [in module %s]"),
17671 sect_offset_str (die
->sect_off
),
17672 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17673 attr_bit_stride
= nullptr;
17677 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17678 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
17683 if (attr_byte_stride
!= nullptr
17684 || attr_bit_stride
!= nullptr)
17686 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
17687 struct dynamic_prop
*stride
17688 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
17691 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
17692 &high
, bias
, stride
, byte_stride_p
);
17695 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
17697 if (high_bound_is_count
)
17698 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17700 /* Ada expects an empty array on no boundary attributes. */
17701 if (attr
== NULL
&& cu
->language
!= language_ada
)
17702 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17704 name
= dwarf2_name (die
, cu
);
17706 TYPE_NAME (range_type
) = name
;
17708 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17709 if (attr
!= nullptr)
17710 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17712 maybe_set_alignment (cu
, die
, range_type
);
17714 set_die_type (die
, range_type
, cu
);
17716 /* set_die_type should be already done. */
17717 set_descriptive_type (range_type
, die
, cu
);
17722 static struct type
*
17723 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17727 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17729 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17731 /* In Ada, an unspecified type is typically used when the description
17732 of the type is deferred to a different unit. When encountering
17733 such a type, we treat it as a stub, and try to resolve it later on,
17735 if (cu
->language
== language_ada
)
17736 TYPE_STUB (type
) = 1;
17738 return set_die_type (die
, type
, cu
);
17741 /* Read a single die and all its descendents. Set the die's sibling
17742 field to NULL; set other fields in the die correctly, and set all
17743 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17744 location of the info_ptr after reading all of those dies. PARENT
17745 is the parent of the die in question. */
17747 static struct die_info
*
17748 read_die_and_children (const struct die_reader_specs
*reader
,
17749 const gdb_byte
*info_ptr
,
17750 const gdb_byte
**new_info_ptr
,
17751 struct die_info
*parent
)
17753 struct die_info
*die
;
17754 const gdb_byte
*cur_ptr
;
17756 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
17759 *new_info_ptr
= cur_ptr
;
17762 store_in_ref_table (die
, reader
->cu
);
17764 if (die
->has_children
)
17765 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17769 *new_info_ptr
= cur_ptr
;
17772 die
->sibling
= NULL
;
17773 die
->parent
= parent
;
17777 /* Read a die, all of its descendents, and all of its siblings; set
17778 all of the fields of all of the dies correctly. Arguments are as
17779 in read_die_and_children. */
17781 static struct die_info
*
17782 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17783 const gdb_byte
*info_ptr
,
17784 const gdb_byte
**new_info_ptr
,
17785 struct die_info
*parent
)
17787 struct die_info
*first_die
, *last_sibling
;
17788 const gdb_byte
*cur_ptr
;
17790 cur_ptr
= info_ptr
;
17791 first_die
= last_sibling
= NULL
;
17795 struct die_info
*die
17796 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17800 *new_info_ptr
= cur_ptr
;
17807 last_sibling
->sibling
= die
;
17809 last_sibling
= die
;
17813 /* Read a die, all of its descendents, and all of its siblings; set
17814 all of the fields of all of the dies correctly. Arguments are as
17815 in read_die_and_children.
17816 This the main entry point for reading a DIE and all its children. */
17818 static struct die_info
*
17819 read_die_and_siblings (const struct die_reader_specs
*reader
,
17820 const gdb_byte
*info_ptr
,
17821 const gdb_byte
**new_info_ptr
,
17822 struct die_info
*parent
)
17824 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17825 new_info_ptr
, parent
);
17827 if (dwarf_die_debug
)
17829 fprintf_unfiltered (gdb_stdlog
,
17830 "Read die from %s@0x%x of %s:\n",
17831 reader
->die_section
->get_name (),
17832 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17833 bfd_get_filename (reader
->abfd
));
17834 dump_die (die
, dwarf_die_debug
);
17840 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17842 The caller is responsible for filling in the extra attributes
17843 and updating (*DIEP)->num_attrs.
17844 Set DIEP to point to a newly allocated die with its information,
17845 except for its child, sibling, and parent fields. */
17847 static const gdb_byte
*
17848 read_full_die_1 (const struct die_reader_specs
*reader
,
17849 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17850 int num_extra_attrs
)
17852 unsigned int abbrev_number
, bytes_read
, i
;
17853 struct abbrev_info
*abbrev
;
17854 struct die_info
*die
;
17855 struct dwarf2_cu
*cu
= reader
->cu
;
17856 bfd
*abfd
= reader
->abfd
;
17858 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17859 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17860 info_ptr
+= bytes_read
;
17861 if (!abbrev_number
)
17867 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17869 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17871 bfd_get_filename (abfd
));
17873 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17874 die
->sect_off
= sect_off
;
17875 die
->tag
= abbrev
->tag
;
17876 die
->abbrev
= abbrev_number
;
17877 die
->has_children
= abbrev
->has_children
;
17879 /* Make the result usable.
17880 The caller needs to update num_attrs after adding the extra
17882 die
->num_attrs
= abbrev
->num_attrs
;
17884 std::vector
<int> indexes_that_need_reprocess
;
17885 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17887 bool need_reprocess
;
17889 read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17890 info_ptr
, &need_reprocess
);
17891 if (need_reprocess
)
17892 indexes_that_need_reprocess
.push_back (i
);
17895 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
17896 if (attr
!= nullptr)
17897 cu
->str_offsets_base
= DW_UNSND (attr
);
17899 attr
= die
->attr (DW_AT_loclists_base
);
17900 if (attr
!= nullptr)
17901 cu
->loclist_base
= DW_UNSND (attr
);
17903 auto maybe_addr_base
= die
->addr_base ();
17904 if (maybe_addr_base
.has_value ())
17905 cu
->addr_base
= *maybe_addr_base
;
17906 for (int index
: indexes_that_need_reprocess
)
17907 read_attribute_reprocess (reader
, &die
->attrs
[index
]);
17912 /* Read a die and all its attributes.
17913 Set DIEP to point to a newly allocated die with its information,
17914 except for its child, sibling, and parent fields. */
17916 static const gdb_byte
*
17917 read_full_die (const struct die_reader_specs
*reader
,
17918 struct die_info
**diep
, const gdb_byte
*info_ptr
)
17920 const gdb_byte
*result
;
17922 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
17924 if (dwarf_die_debug
)
17926 fprintf_unfiltered (gdb_stdlog
,
17927 "Read die from %s@0x%x of %s:\n",
17928 reader
->die_section
->get_name (),
17929 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17930 bfd_get_filename (reader
->abfd
));
17931 dump_die (*diep
, dwarf_die_debug
);
17938 /* Returns nonzero if TAG represents a type that we might generate a partial
17942 is_type_tag_for_partial (int tag
)
17947 /* Some types that would be reasonable to generate partial symbols for,
17948 that we don't at present. */
17949 case DW_TAG_array_type
:
17950 case DW_TAG_file_type
:
17951 case DW_TAG_ptr_to_member_type
:
17952 case DW_TAG_set_type
:
17953 case DW_TAG_string_type
:
17954 case DW_TAG_subroutine_type
:
17956 case DW_TAG_base_type
:
17957 case DW_TAG_class_type
:
17958 case DW_TAG_interface_type
:
17959 case DW_TAG_enumeration_type
:
17960 case DW_TAG_structure_type
:
17961 case DW_TAG_subrange_type
:
17962 case DW_TAG_typedef
:
17963 case DW_TAG_union_type
:
17970 /* Load all DIEs that are interesting for partial symbols into memory. */
17972 static struct partial_die_info
*
17973 load_partial_dies (const struct die_reader_specs
*reader
,
17974 const gdb_byte
*info_ptr
, int building_psymtab
)
17976 struct dwarf2_cu
*cu
= reader
->cu
;
17977 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17978 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
17979 unsigned int bytes_read
;
17980 unsigned int load_all
= 0;
17981 int nesting_level
= 1;
17986 gdb_assert (cu
->per_cu
!= NULL
);
17987 if (cu
->per_cu
->load_all_dies
)
17991 = htab_create_alloc_ex (cu
->header
.length
/ 12,
17995 &cu
->comp_unit_obstack
,
17996 hashtab_obstack_allocate
,
17997 dummy_obstack_deallocate
);
18001 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18003 /* A NULL abbrev means the end of a series of children. */
18004 if (abbrev
== NULL
)
18006 if (--nesting_level
== 0)
18009 info_ptr
+= bytes_read
;
18010 last_die
= parent_die
;
18011 parent_die
= parent_die
->die_parent
;
18015 /* Check for template arguments. We never save these; if
18016 they're seen, we just mark the parent, and go on our way. */
18017 if (parent_die
!= NULL
18018 && cu
->language
== language_cplus
18019 && (abbrev
->tag
== DW_TAG_template_type_param
18020 || abbrev
->tag
== DW_TAG_template_value_param
))
18022 parent_die
->has_template_arguments
= 1;
18026 /* We don't need a partial DIE for the template argument. */
18027 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18032 /* We only recurse into c++ subprograms looking for template arguments.
18033 Skip their other children. */
18035 && cu
->language
== language_cplus
18036 && parent_die
!= NULL
18037 && parent_die
->tag
== DW_TAG_subprogram
)
18039 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18043 /* Check whether this DIE is interesting enough to save. Normally
18044 we would not be interested in members here, but there may be
18045 later variables referencing them via DW_AT_specification (for
18046 static members). */
18048 && !is_type_tag_for_partial (abbrev
->tag
)
18049 && abbrev
->tag
!= DW_TAG_constant
18050 && abbrev
->tag
!= DW_TAG_enumerator
18051 && abbrev
->tag
!= DW_TAG_subprogram
18052 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18053 && abbrev
->tag
!= DW_TAG_lexical_block
18054 && abbrev
->tag
!= DW_TAG_variable
18055 && abbrev
->tag
!= DW_TAG_namespace
18056 && abbrev
->tag
!= DW_TAG_module
18057 && abbrev
->tag
!= DW_TAG_member
18058 && abbrev
->tag
!= DW_TAG_imported_unit
18059 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18061 /* Otherwise we skip to the next sibling, if any. */
18062 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18066 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18069 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18071 /* This two-pass algorithm for processing partial symbols has a
18072 high cost in cache pressure. Thus, handle some simple cases
18073 here which cover the majority of C partial symbols. DIEs
18074 which neither have specification tags in them, nor could have
18075 specification tags elsewhere pointing at them, can simply be
18076 processed and discarded.
18078 This segment is also optional; scan_partial_symbols and
18079 add_partial_symbol will handle these DIEs if we chain
18080 them in normally. When compilers which do not emit large
18081 quantities of duplicate debug information are more common,
18082 this code can probably be removed. */
18084 /* Any complete simple types at the top level (pretty much all
18085 of them, for a language without namespaces), can be processed
18087 if (parent_die
== NULL
18088 && pdi
.has_specification
== 0
18089 && pdi
.is_declaration
== 0
18090 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18091 || pdi
.tag
== DW_TAG_base_type
18092 || pdi
.tag
== DW_TAG_subrange_type
))
18094 if (building_psymtab
&& pdi
.name
!= NULL
)
18095 add_psymbol_to_list (pdi
.name
, false,
18096 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18097 psymbol_placement::STATIC
,
18098 0, cu
->language
, objfile
);
18099 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18103 /* The exception for DW_TAG_typedef with has_children above is
18104 a workaround of GCC PR debug/47510. In the case of this complaint
18105 type_name_or_error will error on such types later.
18107 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18108 it could not find the child DIEs referenced later, this is checked
18109 above. In correct DWARF DW_TAG_typedef should have no children. */
18111 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18112 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18113 "- DIE at %s [in module %s]"),
18114 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18116 /* If we're at the second level, and we're an enumerator, and
18117 our parent has no specification (meaning possibly lives in a
18118 namespace elsewhere), then we can add the partial symbol now
18119 instead of queueing it. */
18120 if (pdi
.tag
== DW_TAG_enumerator
18121 && parent_die
!= NULL
18122 && parent_die
->die_parent
== NULL
18123 && parent_die
->tag
== DW_TAG_enumeration_type
18124 && parent_die
->has_specification
== 0)
18126 if (pdi
.name
== NULL
)
18127 complaint (_("malformed enumerator DIE ignored"));
18128 else if (building_psymtab
)
18129 add_psymbol_to_list (pdi
.name
, false,
18130 VAR_DOMAIN
, LOC_CONST
, -1,
18131 cu
->language
== language_cplus
18132 ? psymbol_placement::GLOBAL
18133 : psymbol_placement::STATIC
,
18134 0, cu
->language
, objfile
);
18136 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18140 struct partial_die_info
*part_die
18141 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18143 /* We'll save this DIE so link it in. */
18144 part_die
->die_parent
= parent_die
;
18145 part_die
->die_sibling
= NULL
;
18146 part_die
->die_child
= NULL
;
18148 if (last_die
&& last_die
== parent_die
)
18149 last_die
->die_child
= part_die
;
18151 last_die
->die_sibling
= part_die
;
18153 last_die
= part_die
;
18155 if (first_die
== NULL
)
18156 first_die
= part_die
;
18158 /* Maybe add the DIE to the hash table. Not all DIEs that we
18159 find interesting need to be in the hash table, because we
18160 also have the parent/sibling/child chains; only those that we
18161 might refer to by offset later during partial symbol reading.
18163 For now this means things that might have be the target of a
18164 DW_AT_specification, DW_AT_abstract_origin, or
18165 DW_AT_extension. DW_AT_extension will refer only to
18166 namespaces; DW_AT_abstract_origin refers to functions (and
18167 many things under the function DIE, but we do not recurse
18168 into function DIEs during partial symbol reading) and
18169 possibly variables as well; DW_AT_specification refers to
18170 declarations. Declarations ought to have the DW_AT_declaration
18171 flag. It happens that GCC forgets to put it in sometimes, but
18172 only for functions, not for types.
18174 Adding more things than necessary to the hash table is harmless
18175 except for the performance cost. Adding too few will result in
18176 wasted time in find_partial_die, when we reread the compilation
18177 unit with load_all_dies set. */
18180 || abbrev
->tag
== DW_TAG_constant
18181 || abbrev
->tag
== DW_TAG_subprogram
18182 || abbrev
->tag
== DW_TAG_variable
18183 || abbrev
->tag
== DW_TAG_namespace
18184 || part_die
->is_declaration
)
18188 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18189 to_underlying (part_die
->sect_off
),
18194 /* For some DIEs we want to follow their children (if any). For C
18195 we have no reason to follow the children of structures; for other
18196 languages we have to, so that we can get at method physnames
18197 to infer fully qualified class names, for DW_AT_specification,
18198 and for C++ template arguments. For C++, we also look one level
18199 inside functions to find template arguments (if the name of the
18200 function does not already contain the template arguments).
18202 For Ada and Fortran, we need to scan the children of subprograms
18203 and lexical blocks as well because these languages allow the
18204 definition of nested entities that could be interesting for the
18205 debugger, such as nested subprograms for instance. */
18206 if (last_die
->has_children
18208 || last_die
->tag
== DW_TAG_namespace
18209 || last_die
->tag
== DW_TAG_module
18210 || last_die
->tag
== DW_TAG_enumeration_type
18211 || (cu
->language
== language_cplus
18212 && last_die
->tag
== DW_TAG_subprogram
18213 && (last_die
->name
== NULL
18214 || strchr (last_die
->name
, '<') == NULL
))
18215 || (cu
->language
!= language_c
18216 && (last_die
->tag
== DW_TAG_class_type
18217 || last_die
->tag
== DW_TAG_interface_type
18218 || last_die
->tag
== DW_TAG_structure_type
18219 || last_die
->tag
== DW_TAG_union_type
))
18220 || ((cu
->language
== language_ada
18221 || cu
->language
== language_fortran
)
18222 && (last_die
->tag
== DW_TAG_subprogram
18223 || last_die
->tag
== DW_TAG_lexical_block
))))
18226 parent_die
= last_die
;
18230 /* Otherwise we skip to the next sibling, if any. */
18231 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18233 /* Back to the top, do it again. */
18237 partial_die_info::partial_die_info (sect_offset sect_off_
,
18238 struct abbrev_info
*abbrev
)
18239 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18243 /* Read a minimal amount of information into the minimal die structure.
18244 INFO_PTR should point just after the initial uleb128 of a DIE. */
18247 partial_die_info::read (const struct die_reader_specs
*reader
,
18248 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18250 struct dwarf2_cu
*cu
= reader
->cu
;
18251 struct dwarf2_per_objfile
*dwarf2_per_objfile
18252 = cu
->per_cu
->dwarf2_per_objfile
;
18254 int has_low_pc_attr
= 0;
18255 int has_high_pc_attr
= 0;
18256 int high_pc_relative
= 0;
18258 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18261 bool need_reprocess
;
18262 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
],
18263 info_ptr
, &need_reprocess
);
18264 /* String and address offsets that need to do the reprocessing have
18265 already been read at this point, so there is no need to wait until
18266 the loop terminates to do the reprocessing. */
18267 if (need_reprocess
)
18268 read_attribute_reprocess (reader
, &attr
);
18269 /* Store the data if it is of an attribute we want to keep in a
18270 partial symbol table. */
18276 case DW_TAG_compile_unit
:
18277 case DW_TAG_partial_unit
:
18278 case DW_TAG_type_unit
:
18279 /* Compilation units have a DW_AT_name that is a filename, not
18280 a source language identifier. */
18281 case DW_TAG_enumeration_type
:
18282 case DW_TAG_enumerator
:
18283 /* These tags always have simple identifiers already; no need
18284 to canonicalize them. */
18285 name
= DW_STRING (&attr
);
18289 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18292 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
, objfile
);
18297 case DW_AT_linkage_name
:
18298 case DW_AT_MIPS_linkage_name
:
18299 /* Note that both forms of linkage name might appear. We
18300 assume they will be the same, and we only store the last
18302 linkage_name
= attr
.value_as_string ();
18303 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
18304 See https://github.com/rust-lang/rust/issues/32925. */
18305 if (cu
->language
== language_rust
&& linkage_name
!= NULL
18306 && strchr (linkage_name
, '{') != NULL
)
18307 linkage_name
= NULL
;
18310 has_low_pc_attr
= 1;
18311 lowpc
= attr
.value_as_address ();
18313 case DW_AT_high_pc
:
18314 has_high_pc_attr
= 1;
18315 highpc
= attr
.value_as_address ();
18316 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
18317 high_pc_relative
= 1;
18319 case DW_AT_location
:
18320 /* Support the .debug_loc offsets. */
18321 if (attr
.form_is_block ())
18323 d
.locdesc
= DW_BLOCK (&attr
);
18325 else if (attr
.form_is_section_offset ())
18327 dwarf2_complex_location_expr_complaint ();
18331 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18332 "partial symbol information");
18335 case DW_AT_external
:
18336 is_external
= DW_UNSND (&attr
);
18338 case DW_AT_declaration
:
18339 is_declaration
= DW_UNSND (&attr
);
18344 case DW_AT_abstract_origin
:
18345 case DW_AT_specification
:
18346 case DW_AT_extension
:
18347 has_specification
= 1;
18348 spec_offset
= attr
.get_ref_die_offset ();
18349 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18350 || cu
->per_cu
->is_dwz
);
18352 case DW_AT_sibling
:
18353 /* Ignore absolute siblings, they might point outside of
18354 the current compile unit. */
18355 if (attr
.form
== DW_FORM_ref_addr
)
18356 complaint (_("ignoring absolute DW_AT_sibling"));
18359 const gdb_byte
*buffer
= reader
->buffer
;
18360 sect_offset off
= attr
.get_ref_die_offset ();
18361 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18363 if (sibling_ptr
< info_ptr
)
18364 complaint (_("DW_AT_sibling points backwards"));
18365 else if (sibling_ptr
> reader
->buffer_end
)
18366 reader
->die_section
->overflow_complaint ();
18368 sibling
= sibling_ptr
;
18371 case DW_AT_byte_size
:
18374 case DW_AT_const_value
:
18375 has_const_value
= 1;
18377 case DW_AT_calling_convention
:
18378 /* DWARF doesn't provide a way to identify a program's source-level
18379 entry point. DW_AT_calling_convention attributes are only meant
18380 to describe functions' calling conventions.
18382 However, because it's a necessary piece of information in
18383 Fortran, and before DWARF 4 DW_CC_program was the only
18384 piece of debugging information whose definition refers to
18385 a 'main program' at all, several compilers marked Fortran
18386 main programs with DW_CC_program --- even when those
18387 functions use the standard calling conventions.
18389 Although DWARF now specifies a way to provide this
18390 information, we support this practice for backward
18392 if (DW_UNSND (&attr
) == DW_CC_program
18393 && cu
->language
== language_fortran
)
18394 main_subprogram
= 1;
18397 if (DW_UNSND (&attr
) == DW_INL_inlined
18398 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18399 may_be_inlined
= 1;
18403 if (tag
== DW_TAG_imported_unit
)
18405 d
.sect_off
= attr
.get_ref_die_offset ();
18406 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18407 || cu
->per_cu
->is_dwz
);
18411 case DW_AT_main_subprogram
:
18412 main_subprogram
= DW_UNSND (&attr
);
18417 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18418 but that requires a full DIE, so instead we just
18420 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18421 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18422 + (need_ranges_base
18426 /* Value of the DW_AT_ranges attribute is the offset in the
18427 .debug_ranges section. */
18428 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18439 /* For Ada, if both the name and the linkage name appear, we prefer
18440 the latter. This lets "catch exception" work better, regardless
18441 of the order in which the name and linkage name were emitted.
18442 Really, though, this is just a workaround for the fact that gdb
18443 doesn't store both the name and the linkage name. */
18444 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18445 name
= linkage_name
;
18447 if (high_pc_relative
)
18450 if (has_low_pc_attr
&& has_high_pc_attr
)
18452 /* When using the GNU linker, .gnu.linkonce. sections are used to
18453 eliminate duplicate copies of functions and vtables and such.
18454 The linker will arbitrarily choose one and discard the others.
18455 The AT_*_pc values for such functions refer to local labels in
18456 these sections. If the section from that file was discarded, the
18457 labels are not in the output, so the relocs get a value of 0.
18458 If this is a discarded function, mark the pc bounds as invalid,
18459 so that GDB will ignore it. */
18460 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18462 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18463 struct gdbarch
*gdbarch
= objfile
->arch ();
18465 complaint (_("DW_AT_low_pc %s is zero "
18466 "for DIE at %s [in module %s]"),
18467 paddress (gdbarch
, lowpc
),
18468 sect_offset_str (sect_off
),
18469 objfile_name (objfile
));
18471 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18472 else if (lowpc
>= highpc
)
18474 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18475 struct gdbarch
*gdbarch
= objfile
->arch ();
18477 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18478 "for DIE at %s [in module %s]"),
18479 paddress (gdbarch
, lowpc
),
18480 paddress (gdbarch
, highpc
),
18481 sect_offset_str (sect_off
),
18482 objfile_name (objfile
));
18491 /* Find a cached partial DIE at OFFSET in CU. */
18493 struct partial_die_info
*
18494 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18496 struct partial_die_info
*lookup_die
= NULL
;
18497 struct partial_die_info
part_die (sect_off
);
18499 lookup_die
= ((struct partial_die_info
*)
18500 htab_find_with_hash (partial_dies
, &part_die
,
18501 to_underlying (sect_off
)));
18506 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18507 except in the case of .debug_types DIEs which do not reference
18508 outside their CU (they do however referencing other types via
18509 DW_FORM_ref_sig8). */
18511 static const struct cu_partial_die_info
18512 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18514 struct dwarf2_per_objfile
*dwarf2_per_objfile
18515 = cu
->per_cu
->dwarf2_per_objfile
;
18516 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18517 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18518 struct partial_die_info
*pd
= NULL
;
18520 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18521 && cu
->header
.offset_in_cu_p (sect_off
))
18523 pd
= cu
->find_partial_die (sect_off
);
18526 /* We missed recording what we needed.
18527 Load all dies and try again. */
18528 per_cu
= cu
->per_cu
;
18532 /* TUs don't reference other CUs/TUs (except via type signatures). */
18533 if (cu
->per_cu
->is_debug_types
)
18535 error (_("Dwarf Error: Type Unit at offset %s contains"
18536 " external reference to offset %s [in module %s].\n"),
18537 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18538 bfd_get_filename (objfile
->obfd
));
18540 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18541 dwarf2_per_objfile
);
18543 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18544 load_partial_comp_unit (per_cu
);
18546 per_cu
->cu
->last_used
= 0;
18547 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18550 /* If we didn't find it, and not all dies have been loaded,
18551 load them all and try again. */
18553 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18555 per_cu
->load_all_dies
= 1;
18557 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18558 THIS_CU->cu may already be in use. So we can't just free it and
18559 replace its DIEs with the ones we read in. Instead, we leave those
18560 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18561 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18563 load_partial_comp_unit (per_cu
);
18565 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18569 internal_error (__FILE__
, __LINE__
,
18570 _("could not find partial DIE %s "
18571 "in cache [from module %s]\n"),
18572 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18573 return { per_cu
->cu
, pd
};
18576 /* See if we can figure out if the class lives in a namespace. We do
18577 this by looking for a member function; its demangled name will
18578 contain namespace info, if there is any. */
18581 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18582 struct dwarf2_cu
*cu
)
18584 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18585 what template types look like, because the demangler
18586 frequently doesn't give the same name as the debug info. We
18587 could fix this by only using the demangled name to get the
18588 prefix (but see comment in read_structure_type). */
18590 struct partial_die_info
*real_pdi
;
18591 struct partial_die_info
*child_pdi
;
18593 /* If this DIE (this DIE's specification, if any) has a parent, then
18594 we should not do this. We'll prepend the parent's fully qualified
18595 name when we create the partial symbol. */
18597 real_pdi
= struct_pdi
;
18598 while (real_pdi
->has_specification
)
18600 auto res
= find_partial_die (real_pdi
->spec_offset
,
18601 real_pdi
->spec_is_dwz
, cu
);
18602 real_pdi
= res
.pdi
;
18606 if (real_pdi
->die_parent
!= NULL
)
18609 for (child_pdi
= struct_pdi
->die_child
;
18611 child_pdi
= child_pdi
->die_sibling
)
18613 if (child_pdi
->tag
== DW_TAG_subprogram
18614 && child_pdi
->linkage_name
!= NULL
)
18616 gdb::unique_xmalloc_ptr
<char> actual_class_name
18617 (language_class_name_from_physname (cu
->language_defn
,
18618 child_pdi
->linkage_name
));
18619 if (actual_class_name
!= NULL
)
18621 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18622 struct_pdi
->name
= objfile
->intern (actual_class_name
.get ());
18629 /* Return true if a DIE with TAG may have the DW_AT_const_value
18633 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
18637 case DW_TAG_constant
:
18638 case DW_TAG_enumerator
:
18639 case DW_TAG_formal_parameter
:
18640 case DW_TAG_template_value_param
:
18641 case DW_TAG_variable
:
18649 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18651 /* Once we've fixed up a die, there's no point in doing so again.
18652 This also avoids a memory leak if we were to call
18653 guess_partial_die_structure_name multiple times. */
18657 /* If we found a reference attribute and the DIE has no name, try
18658 to find a name in the referred to DIE. */
18660 if (name
== NULL
&& has_specification
)
18662 struct partial_die_info
*spec_die
;
18664 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18665 spec_die
= res
.pdi
;
18668 spec_die
->fixup (cu
);
18670 if (spec_die
->name
)
18672 name
= spec_die
->name
;
18674 /* Copy DW_AT_external attribute if it is set. */
18675 if (spec_die
->is_external
)
18676 is_external
= spec_die
->is_external
;
18680 if (!has_const_value
&& has_specification
18681 && can_have_DW_AT_const_value_p (tag
))
18683 struct partial_die_info
*spec_die
;
18685 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18686 spec_die
= res
.pdi
;
18689 spec_die
->fixup (cu
);
18691 if (spec_die
->has_const_value
)
18693 /* Copy DW_AT_const_value attribute if it is set. */
18694 has_const_value
= spec_die
->has_const_value
;
18698 /* Set default names for some unnamed DIEs. */
18700 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18701 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18703 /* If there is no parent die to provide a namespace, and there are
18704 children, see if we can determine the namespace from their linkage
18706 if (cu
->language
== language_cplus
18707 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
18708 && die_parent
== NULL
18710 && (tag
== DW_TAG_class_type
18711 || tag
== DW_TAG_structure_type
18712 || tag
== DW_TAG_union_type
))
18713 guess_partial_die_structure_name (this, cu
);
18715 /* GCC might emit a nameless struct or union that has a linkage
18716 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18718 && (tag
== DW_TAG_class_type
18719 || tag
== DW_TAG_interface_type
18720 || tag
== DW_TAG_structure_type
18721 || tag
== DW_TAG_union_type
)
18722 && linkage_name
!= NULL
)
18724 gdb::unique_xmalloc_ptr
<char> demangled
18725 (gdb_demangle (linkage_name
, DMGL_TYPES
));
18726 if (demangled
!= nullptr)
18730 /* Strip any leading namespaces/classes, keep only the base name.
18731 DW_AT_name for named DIEs does not contain the prefixes. */
18732 base
= strrchr (demangled
.get (), ':');
18733 if (base
&& base
> demangled
.get () && base
[-1] == ':')
18736 base
= demangled
.get ();
18738 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18739 name
= objfile
->intern (base
);
18746 /* Read the .debug_loclists header contents from the given SECTION in the
18749 read_loclist_header (struct loclist_header
*header
,
18750 struct dwarf2_section_info
*section
)
18752 unsigned int bytes_read
;
18753 bfd
*abfd
= section
->get_bfd_owner ();
18754 const gdb_byte
*info_ptr
= section
->buffer
;
18755 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
18756 info_ptr
+= bytes_read
;
18757 header
->version
= read_2_bytes (abfd
, info_ptr
);
18759 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
18761 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
18763 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
18766 /* Return the DW_AT_loclists_base value for the CU. */
18768 lookup_loclist_base (struct dwarf2_cu
*cu
)
18770 /* For the .dwo unit, the loclist_base points to the first offset following
18771 the header. The header consists of the following entities-
18772 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
18774 2. version (2 bytes)
18775 3. address size (1 byte)
18776 4. segment selector size (1 byte)
18777 5. offset entry count (4 bytes)
18778 These sizes are derived as per the DWARFv5 standard. */
18779 if (cu
->dwo_unit
!= nullptr)
18781 if (cu
->header
.initial_length_size
== 4)
18782 return LOCLIST_HEADER_SIZE32
;
18783 return LOCLIST_HEADER_SIZE64
;
18785 return cu
->loclist_base
;
18788 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
18789 array of offsets in the .debug_loclists section. */
18791 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
18793 struct dwarf2_per_objfile
*dwarf2_per_objfile
18794 = cu
->per_cu
->dwarf2_per_objfile
;
18795 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18796 bfd
*abfd
= objfile
->obfd
;
18797 ULONGEST loclist_base
= lookup_loclist_base (cu
);
18798 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18800 section
->read (objfile
);
18801 if (section
->buffer
== NULL
)
18802 complaint (_("DW_FORM_loclistx used without .debug_loclists "
18803 "section [in module %s]"), objfile_name (objfile
));
18804 struct loclist_header header
;
18805 read_loclist_header (&header
, section
);
18806 if (loclist_index
>= header
.offset_entry_count
)
18807 complaint (_("DW_FORM_loclistx pointing outside of "
18808 ".debug_loclists offset array [in module %s]"),
18809 objfile_name (objfile
));
18810 if (loclist_base
+ loclist_index
* cu
->header
.offset_size
18812 complaint (_("DW_FORM_loclistx pointing outside of "
18813 ".debug_loclists section [in module %s]"),
18814 objfile_name (objfile
));
18815 const gdb_byte
*info_ptr
18816 = section
->buffer
+ loclist_base
+ loclist_index
* cu
->header
.offset_size
;
18818 if (cu
->header
.offset_size
== 4)
18819 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
18821 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
18824 /* Process the attributes that had to be skipped in the first round. These
18825 attributes are the ones that need str_offsets_base or addr_base attributes.
18826 They could not have been processed in the first round, because at the time
18827 the values of str_offsets_base or addr_base may not have been known. */
18829 read_attribute_reprocess (const struct die_reader_specs
*reader
,
18830 struct attribute
*attr
)
18832 struct dwarf2_cu
*cu
= reader
->cu
;
18833 switch (attr
->form
)
18835 case DW_FORM_addrx
:
18836 case DW_FORM_GNU_addr_index
:
18837 DW_ADDR (attr
) = read_addr_index (cu
, DW_UNSND (attr
));
18839 case DW_FORM_loclistx
:
18840 DW_UNSND (attr
) = read_loclist_index (cu
, DW_UNSND (attr
));
18843 case DW_FORM_strx1
:
18844 case DW_FORM_strx2
:
18845 case DW_FORM_strx3
:
18846 case DW_FORM_strx4
:
18847 case DW_FORM_GNU_str_index
:
18849 unsigned int str_index
= DW_UNSND (attr
);
18850 if (reader
->dwo_file
!= NULL
)
18852 DW_STRING (attr
) = read_dwo_str_index (reader
, str_index
);
18853 DW_STRING_IS_CANONICAL (attr
) = 0;
18857 DW_STRING (attr
) = read_stub_str_index (cu
, str_index
);
18858 DW_STRING_IS_CANONICAL (attr
) = 0;
18863 gdb_assert_not_reached (_("Unexpected DWARF form."));
18867 /* Read an attribute value described by an attribute form. */
18869 static const gdb_byte
*
18870 read_attribute_value (const struct die_reader_specs
*reader
,
18871 struct attribute
*attr
, unsigned form
,
18872 LONGEST implicit_const
, const gdb_byte
*info_ptr
,
18873 bool *need_reprocess
)
18875 struct dwarf2_cu
*cu
= reader
->cu
;
18876 struct dwarf2_per_objfile
*dwarf2_per_objfile
18877 = cu
->per_cu
->dwarf2_per_objfile
;
18878 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18879 bfd
*abfd
= reader
->abfd
;
18880 struct comp_unit_head
*cu_header
= &cu
->header
;
18881 unsigned int bytes_read
;
18882 struct dwarf_block
*blk
;
18883 *need_reprocess
= false;
18885 attr
->form
= (enum dwarf_form
) form
;
18888 case DW_FORM_ref_addr
:
18889 if (cu
->header
.version
== 2)
18890 DW_UNSND (attr
) = cu
->header
.read_address (abfd
, info_ptr
,
18893 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
,
18895 info_ptr
+= bytes_read
;
18897 case DW_FORM_GNU_ref_alt
:
18898 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
18899 info_ptr
+= bytes_read
;
18903 struct gdbarch
*gdbarch
= objfile
->arch ();
18904 DW_ADDR (attr
) = cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
18905 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18906 info_ptr
+= bytes_read
;
18909 case DW_FORM_block2
:
18910 blk
= dwarf_alloc_block (cu
);
18911 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18913 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18914 info_ptr
+= blk
->size
;
18915 DW_BLOCK (attr
) = blk
;
18917 case DW_FORM_block4
:
18918 blk
= dwarf_alloc_block (cu
);
18919 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18921 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18922 info_ptr
+= blk
->size
;
18923 DW_BLOCK (attr
) = blk
;
18925 case DW_FORM_data2
:
18926 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18929 case DW_FORM_data4
:
18930 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18933 case DW_FORM_data8
:
18934 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18937 case DW_FORM_data16
:
18938 blk
= dwarf_alloc_block (cu
);
18940 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18942 DW_BLOCK (attr
) = blk
;
18944 case DW_FORM_sec_offset
:
18945 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
18946 info_ptr
+= bytes_read
;
18948 case DW_FORM_loclistx
:
18950 *need_reprocess
= true;
18951 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18952 info_ptr
+= bytes_read
;
18955 case DW_FORM_string
:
18956 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18957 DW_STRING_IS_CANONICAL (attr
) = 0;
18958 info_ptr
+= bytes_read
;
18961 if (!cu
->per_cu
->is_dwz
)
18963 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18964 abfd
, info_ptr
, cu_header
,
18966 DW_STRING_IS_CANONICAL (attr
) = 0;
18967 info_ptr
+= bytes_read
;
18971 case DW_FORM_line_strp
:
18972 if (!cu
->per_cu
->is_dwz
)
18975 = dwarf2_per_objfile
->read_line_string (info_ptr
, cu_header
,
18977 DW_STRING_IS_CANONICAL (attr
) = 0;
18978 info_ptr
+= bytes_read
;
18982 case DW_FORM_GNU_strp_alt
:
18984 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18985 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
18988 DW_STRING (attr
) = dwz
->read_string (objfile
, str_offset
);
18989 DW_STRING_IS_CANONICAL (attr
) = 0;
18990 info_ptr
+= bytes_read
;
18993 case DW_FORM_exprloc
:
18994 case DW_FORM_block
:
18995 blk
= dwarf_alloc_block (cu
);
18996 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18997 info_ptr
+= bytes_read
;
18998 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18999 info_ptr
+= blk
->size
;
19000 DW_BLOCK (attr
) = blk
;
19002 case DW_FORM_block1
:
19003 blk
= dwarf_alloc_block (cu
);
19004 blk
->size
= read_1_byte (abfd
, info_ptr
);
19006 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19007 info_ptr
+= blk
->size
;
19008 DW_BLOCK (attr
) = blk
;
19010 case DW_FORM_data1
:
19011 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19015 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19018 case DW_FORM_flag_present
:
19019 DW_UNSND (attr
) = 1;
19021 case DW_FORM_sdata
:
19022 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19023 info_ptr
+= bytes_read
;
19025 case DW_FORM_udata
:
19026 case DW_FORM_rnglistx
:
19027 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19028 info_ptr
+= bytes_read
;
19031 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19032 + read_1_byte (abfd
, info_ptr
));
19036 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19037 + read_2_bytes (abfd
, info_ptr
));
19041 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19042 + read_4_bytes (abfd
, info_ptr
));
19046 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19047 + read_8_bytes (abfd
, info_ptr
));
19050 case DW_FORM_ref_sig8
:
19051 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19054 case DW_FORM_ref_udata
:
19055 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19056 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19057 info_ptr
+= bytes_read
;
19059 case DW_FORM_indirect
:
19060 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19061 info_ptr
+= bytes_read
;
19062 if (form
== DW_FORM_implicit_const
)
19064 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19065 info_ptr
+= bytes_read
;
19067 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19068 info_ptr
, need_reprocess
);
19070 case DW_FORM_implicit_const
:
19071 DW_SND (attr
) = implicit_const
;
19073 case DW_FORM_addrx
:
19074 case DW_FORM_GNU_addr_index
:
19075 *need_reprocess
= true;
19076 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19077 info_ptr
+= bytes_read
;
19080 case DW_FORM_strx1
:
19081 case DW_FORM_strx2
:
19082 case DW_FORM_strx3
:
19083 case DW_FORM_strx4
:
19084 case DW_FORM_GNU_str_index
:
19086 ULONGEST str_index
;
19087 if (form
== DW_FORM_strx1
)
19089 str_index
= read_1_byte (abfd
, info_ptr
);
19092 else if (form
== DW_FORM_strx2
)
19094 str_index
= read_2_bytes (abfd
, info_ptr
);
19097 else if (form
== DW_FORM_strx3
)
19099 str_index
= read_3_bytes (abfd
, info_ptr
);
19102 else if (form
== DW_FORM_strx4
)
19104 str_index
= read_4_bytes (abfd
, info_ptr
);
19109 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19110 info_ptr
+= bytes_read
;
19112 *need_reprocess
= true;
19113 DW_UNSND (attr
) = str_index
;
19117 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19118 dwarf_form_name (form
),
19119 bfd_get_filename (abfd
));
19123 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
19124 attr
->form
= DW_FORM_GNU_ref_alt
;
19126 /* We have seen instances where the compiler tried to emit a byte
19127 size attribute of -1 which ended up being encoded as an unsigned
19128 0xffffffff. Although 0xffffffff is technically a valid size value,
19129 an object of this size seems pretty unlikely so we can relatively
19130 safely treat these cases as if the size attribute was invalid and
19131 treat them as zero by default. */
19132 if (attr
->name
== DW_AT_byte_size
19133 && form
== DW_FORM_data4
19134 && DW_UNSND (attr
) >= 0xffffffff)
19137 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19138 hex_string (DW_UNSND (attr
)));
19139 DW_UNSND (attr
) = 0;
19145 /* Read an attribute described by an abbreviated attribute. */
19147 static const gdb_byte
*
19148 read_attribute (const struct die_reader_specs
*reader
,
19149 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19150 const gdb_byte
*info_ptr
, bool *need_reprocess
)
19152 attr
->name
= abbrev
->name
;
19153 return read_attribute_value (reader
, attr
, abbrev
->form
,
19154 abbrev
->implicit_const
, info_ptr
,
19158 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19160 static const char *
19161 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19162 LONGEST str_offset
)
19164 return dwarf2_per_objfile
->str
.read_string (dwarf2_per_objfile
->objfile
,
19165 str_offset
, "DW_FORM_strp");
19168 /* Return pointer to string at .debug_str offset as read from BUF.
19169 BUF is assumed to be in a compilation unit described by CU_HEADER.
19170 Return *BYTES_READ_PTR count of bytes read from BUF. */
19172 static const char *
19173 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19174 const gdb_byte
*buf
,
19175 const struct comp_unit_head
*cu_header
,
19176 unsigned int *bytes_read_ptr
)
19178 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19180 return read_indirect_string_at_offset (dwarf2_per_objfile
, str_offset
);
19186 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
19187 const struct comp_unit_head
*cu_header
,
19188 unsigned int *bytes_read_ptr
)
19190 bfd
*abfd
= objfile
->obfd
;
19191 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19193 return line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
19196 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19197 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
19198 ADDR_SIZE is the size of addresses from the CU header. */
19201 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19202 unsigned int addr_index
, gdb::optional
<ULONGEST
> addr_base
,
19205 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19206 bfd
*abfd
= objfile
->obfd
;
19207 const gdb_byte
*info_ptr
;
19208 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
19210 dwarf2_per_objfile
->addr
.read (objfile
);
19211 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19212 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19213 objfile_name (objfile
));
19214 if (addr_base_or_zero
+ addr_index
* addr_size
19215 >= dwarf2_per_objfile
->addr
.size
)
19216 error (_("DW_FORM_addr_index pointing outside of "
19217 ".debug_addr section [in module %s]"),
19218 objfile_name (objfile
));
19219 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19220 + addr_base_or_zero
+ addr_index
* addr_size
);
19221 if (addr_size
== 4)
19222 return bfd_get_32 (abfd
, info_ptr
);
19224 return bfd_get_64 (abfd
, info_ptr
);
19227 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19230 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19232 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19233 cu
->addr_base
, cu
->header
.addr_size
);
19236 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19239 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19240 unsigned int *bytes_read
)
19242 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19243 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19245 return read_addr_index (cu
, addr_index
);
19251 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
, unsigned int addr_index
)
19253 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19254 struct dwarf2_cu
*cu
= per_cu
->cu
;
19255 gdb::optional
<ULONGEST
> addr_base
;
19258 /* We need addr_base and addr_size.
19259 If we don't have PER_CU->cu, we have to get it.
19260 Nasty, but the alternative is storing the needed info in PER_CU,
19261 which at this point doesn't seem justified: it's not clear how frequently
19262 it would get used and it would increase the size of every PER_CU.
19263 Entry points like dwarf2_per_cu_addr_size do a similar thing
19264 so we're not in uncharted territory here.
19265 Alas we need to be a bit more complicated as addr_base is contained
19268 We don't need to read the entire CU(/TU).
19269 We just need the header and top level die.
19271 IWBN to use the aging mechanism to let us lazily later discard the CU.
19272 For now we skip this optimization. */
19276 addr_base
= cu
->addr_base
;
19277 addr_size
= cu
->header
.addr_size
;
19281 cutu_reader
reader (per_cu
, NULL
, 0, false);
19282 addr_base
= reader
.cu
->addr_base
;
19283 addr_size
= reader
.cu
->header
.addr_size
;
19286 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19290 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
19291 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
19294 static const char *
19295 read_str_index (struct dwarf2_cu
*cu
,
19296 struct dwarf2_section_info
*str_section
,
19297 struct dwarf2_section_info
*str_offsets_section
,
19298 ULONGEST str_offsets_base
, ULONGEST str_index
)
19300 struct dwarf2_per_objfile
*dwarf2_per_objfile
19301 = cu
->per_cu
->dwarf2_per_objfile
;
19302 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19303 const char *objf_name
= objfile_name (objfile
);
19304 bfd
*abfd
= objfile
->obfd
;
19305 const gdb_byte
*info_ptr
;
19306 ULONGEST str_offset
;
19307 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19309 str_section
->read (objfile
);
19310 str_offsets_section
->read (objfile
);
19311 if (str_section
->buffer
== NULL
)
19312 error (_("%s used without %s section"
19313 " in CU at offset %s [in module %s]"),
19314 form_name
, str_section
->get_name (),
19315 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19316 if (str_offsets_section
->buffer
== NULL
)
19317 error (_("%s used without %s section"
19318 " in CU at offset %s [in module %s]"),
19319 form_name
, str_section
->get_name (),
19320 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19321 info_ptr
= (str_offsets_section
->buffer
19323 + str_index
* cu
->header
.offset_size
);
19324 if (cu
->header
.offset_size
== 4)
19325 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19327 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19328 if (str_offset
>= str_section
->size
)
19329 error (_("Offset from %s pointing outside of"
19330 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19331 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19332 return (const char *) (str_section
->buffer
+ str_offset
);
19335 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
19337 static const char *
19338 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19340 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
19341 ? reader
->cu
->header
.addr_size
: 0;
19342 return read_str_index (reader
->cu
,
19343 &reader
->dwo_file
->sections
.str
,
19344 &reader
->dwo_file
->sections
.str_offsets
,
19345 str_offsets_base
, str_index
);
19348 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
19350 static const char *
19351 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
19353 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19354 const char *objf_name
= objfile_name (objfile
);
19355 static const char form_name
[] = "DW_FORM_GNU_str_index";
19356 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
19358 if (!cu
->str_offsets_base
.has_value ())
19359 error (_("%s used in Fission stub without %s"
19360 " in CU at offset 0x%lx [in module %s]"),
19361 form_name
, str_offsets_attr_name
,
19362 (long) cu
->header
.offset_size
, objf_name
);
19364 return read_str_index (cu
,
19365 &cu
->per_cu
->dwarf2_per_objfile
->str
,
19366 &cu
->per_cu
->dwarf2_per_objfile
->str_offsets
,
19367 *cu
->str_offsets_base
, str_index
);
19370 /* Return the length of an LEB128 number in BUF. */
19373 leb128_size (const gdb_byte
*buf
)
19375 const gdb_byte
*begin
= buf
;
19381 if ((byte
& 128) == 0)
19382 return buf
- begin
;
19387 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19396 cu
->language
= language_c
;
19399 case DW_LANG_C_plus_plus
:
19400 case DW_LANG_C_plus_plus_11
:
19401 case DW_LANG_C_plus_plus_14
:
19402 cu
->language
= language_cplus
;
19405 cu
->language
= language_d
;
19407 case DW_LANG_Fortran77
:
19408 case DW_LANG_Fortran90
:
19409 case DW_LANG_Fortran95
:
19410 case DW_LANG_Fortran03
:
19411 case DW_LANG_Fortran08
:
19412 cu
->language
= language_fortran
;
19415 cu
->language
= language_go
;
19417 case DW_LANG_Mips_Assembler
:
19418 cu
->language
= language_asm
;
19420 case DW_LANG_Ada83
:
19421 case DW_LANG_Ada95
:
19422 cu
->language
= language_ada
;
19424 case DW_LANG_Modula2
:
19425 cu
->language
= language_m2
;
19427 case DW_LANG_Pascal83
:
19428 cu
->language
= language_pascal
;
19431 cu
->language
= language_objc
;
19434 case DW_LANG_Rust_old
:
19435 cu
->language
= language_rust
;
19437 case DW_LANG_Cobol74
:
19438 case DW_LANG_Cobol85
:
19440 cu
->language
= language_minimal
;
19443 cu
->language_defn
= language_def (cu
->language
);
19446 /* Return the named attribute or NULL if not there. */
19448 static struct attribute
*
19449 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19454 struct attribute
*spec
= NULL
;
19456 for (i
= 0; i
< die
->num_attrs
; ++i
)
19458 if (die
->attrs
[i
].name
== name
)
19459 return &die
->attrs
[i
];
19460 if (die
->attrs
[i
].name
== DW_AT_specification
19461 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19462 spec
= &die
->attrs
[i
];
19468 die
= follow_die_ref (die
, spec
, &cu
);
19474 /* Return the string associated with a string-typed attribute, or NULL if it
19475 is either not found or is of an incorrect type. */
19477 static const char *
19478 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19480 struct attribute
*attr
;
19481 const char *str
= NULL
;
19483 attr
= dwarf2_attr (die
, name
, cu
);
19487 str
= attr
->value_as_string ();
19488 if (str
== nullptr)
19489 complaint (_("string type expected for attribute %s for "
19490 "DIE at %s in module %s"),
19491 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19492 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19498 /* Return the dwo name or NULL if not present. If present, it is in either
19499 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
19500 static const char *
19501 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19503 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
19504 if (dwo_name
== nullptr)
19505 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
19509 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19510 and holds a non-zero value. This function should only be used for
19511 DW_FORM_flag or DW_FORM_flag_present attributes. */
19514 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19516 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19518 return (attr
&& DW_UNSND (attr
));
19522 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19524 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19525 which value is non-zero. However, we have to be careful with
19526 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19527 (via dwarf2_flag_true_p) follows this attribute. So we may
19528 end up accidently finding a declaration attribute that belongs
19529 to a different DIE referenced by the specification attribute,
19530 even though the given DIE does not have a declaration attribute. */
19531 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19532 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19535 /* Return the die giving the specification for DIE, if there is
19536 one. *SPEC_CU is the CU containing DIE on input, and the CU
19537 containing the return value on output. If there is no
19538 specification, but there is an abstract origin, that is
19541 static struct die_info
*
19542 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19544 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19547 if (spec_attr
== NULL
)
19548 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19550 if (spec_attr
== NULL
)
19553 return follow_die_ref (die
, spec_attr
, spec_cu
);
19556 /* Stub for free_line_header to match void * callback types. */
19559 free_line_header_voidp (void *arg
)
19561 struct line_header
*lh
= (struct line_header
*) arg
;
19566 /* A convenience function to find the proper .debug_line section for a CU. */
19568 static struct dwarf2_section_info
*
19569 get_debug_line_section (struct dwarf2_cu
*cu
)
19571 struct dwarf2_section_info
*section
;
19572 struct dwarf2_per_objfile
*dwarf2_per_objfile
19573 = cu
->per_cu
->dwarf2_per_objfile
;
19575 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19577 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19578 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19579 else if (cu
->per_cu
->is_dwz
)
19581 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19583 section
= &dwz
->line
;
19586 section
= &dwarf2_per_objfile
->line
;
19591 /* Read the statement program header starting at OFFSET in
19592 .debug_line, or .debug_line.dwo. Return a pointer
19593 to a struct line_header, allocated using xmalloc.
19594 Returns NULL if there is a problem reading the header, e.g., if it
19595 has a version we don't understand.
19597 NOTE: the strings in the include directory and file name tables of
19598 the returned object point into the dwarf line section buffer,
19599 and must not be freed. */
19601 static line_header_up
19602 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
19604 struct dwarf2_section_info
*section
;
19605 struct dwarf2_per_objfile
*dwarf2_per_objfile
19606 = cu
->per_cu
->dwarf2_per_objfile
;
19608 section
= get_debug_line_section (cu
);
19609 section
->read (dwarf2_per_objfile
->objfile
);
19610 if (section
->buffer
== NULL
)
19612 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19613 complaint (_("missing .debug_line.dwo section"));
19615 complaint (_("missing .debug_line section"));
19619 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
19620 dwarf2_per_objfile
, section
,
19624 /* Subroutine of dwarf_decode_lines to simplify it.
19625 Return the file name of the psymtab for the given file_entry.
19626 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19627 If space for the result is malloc'd, *NAME_HOLDER will be set.
19628 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
19630 static const char *
19631 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
19632 const dwarf2_psymtab
*pst
,
19633 const char *comp_dir
,
19634 gdb::unique_xmalloc_ptr
<char> *name_holder
)
19636 const char *include_name
= fe
.name
;
19637 const char *include_name_to_compare
= include_name
;
19638 const char *pst_filename
;
19641 const char *dir_name
= fe
.include_dir (lh
);
19643 gdb::unique_xmalloc_ptr
<char> hold_compare
;
19644 if (!IS_ABSOLUTE_PATH (include_name
)
19645 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
19647 /* Avoid creating a duplicate psymtab for PST.
19648 We do this by comparing INCLUDE_NAME and PST_FILENAME.
19649 Before we do the comparison, however, we need to account
19650 for DIR_NAME and COMP_DIR.
19651 First prepend dir_name (if non-NULL). If we still don't
19652 have an absolute path prepend comp_dir (if non-NULL).
19653 However, the directory we record in the include-file's
19654 psymtab does not contain COMP_DIR (to match the
19655 corresponding symtab(s)).
19660 bash$ gcc -g ./hello.c
19661 include_name = "hello.c"
19663 DW_AT_comp_dir = comp_dir = "/tmp"
19664 DW_AT_name = "./hello.c"
19668 if (dir_name
!= NULL
)
19670 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
19671 include_name
, (char *) NULL
));
19672 include_name
= name_holder
->get ();
19673 include_name_to_compare
= include_name
;
19675 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
19677 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
19678 include_name
, (char *) NULL
));
19679 include_name_to_compare
= hold_compare
.get ();
19683 pst_filename
= pst
->filename
;
19684 gdb::unique_xmalloc_ptr
<char> copied_name
;
19685 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
19687 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
19688 pst_filename
, (char *) NULL
));
19689 pst_filename
= copied_name
.get ();
19692 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
19696 return include_name
;
19699 /* State machine to track the state of the line number program. */
19701 class lnp_state_machine
19704 /* Initialize a machine state for the start of a line number
19706 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
19707 bool record_lines_p
);
19709 file_entry
*current_file ()
19711 /* lh->file_names is 0-based, but the file name numbers in the
19712 statement program are 1-based. */
19713 return m_line_header
->file_name_at (m_file
);
19716 /* Record the line in the state machine. END_SEQUENCE is true if
19717 we're processing the end of a sequence. */
19718 void record_line (bool end_sequence
);
19720 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
19721 nop-out rest of the lines in this sequence. */
19722 void check_line_address (struct dwarf2_cu
*cu
,
19723 const gdb_byte
*line_ptr
,
19724 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
19726 void handle_set_discriminator (unsigned int discriminator
)
19728 m_discriminator
= discriminator
;
19729 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
19732 /* Handle DW_LNE_set_address. */
19733 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
19736 address
+= baseaddr
;
19737 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
19740 /* Handle DW_LNS_advance_pc. */
19741 void handle_advance_pc (CORE_ADDR adjust
);
19743 /* Handle a special opcode. */
19744 void handle_special_opcode (unsigned char op_code
);
19746 /* Handle DW_LNS_advance_line. */
19747 void handle_advance_line (int line_delta
)
19749 advance_line (line_delta
);
19752 /* Handle DW_LNS_set_file. */
19753 void handle_set_file (file_name_index file
);
19755 /* Handle DW_LNS_negate_stmt. */
19756 void handle_negate_stmt ()
19758 m_is_stmt
= !m_is_stmt
;
19761 /* Handle DW_LNS_const_add_pc. */
19762 void handle_const_add_pc ();
19764 /* Handle DW_LNS_fixed_advance_pc. */
19765 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
19767 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19771 /* Handle DW_LNS_copy. */
19772 void handle_copy ()
19774 record_line (false);
19775 m_discriminator
= 0;
19778 /* Handle DW_LNE_end_sequence. */
19779 void handle_end_sequence ()
19781 m_currently_recording_lines
= true;
19785 /* Advance the line by LINE_DELTA. */
19786 void advance_line (int line_delta
)
19788 m_line
+= line_delta
;
19790 if (line_delta
!= 0)
19791 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19794 struct dwarf2_cu
*m_cu
;
19796 gdbarch
*m_gdbarch
;
19798 /* True if we're recording lines.
19799 Otherwise we're building partial symtabs and are just interested in
19800 finding include files mentioned by the line number program. */
19801 bool m_record_lines_p
;
19803 /* The line number header. */
19804 line_header
*m_line_header
;
19806 /* These are part of the standard DWARF line number state machine,
19807 and initialized according to the DWARF spec. */
19809 unsigned char m_op_index
= 0;
19810 /* The line table index of the current file. */
19811 file_name_index m_file
= 1;
19812 unsigned int m_line
= 1;
19814 /* These are initialized in the constructor. */
19816 CORE_ADDR m_address
;
19818 unsigned int m_discriminator
;
19820 /* Additional bits of state we need to track. */
19822 /* The last file that we called dwarf2_start_subfile for.
19823 This is only used for TLLs. */
19824 unsigned int m_last_file
= 0;
19825 /* The last file a line number was recorded for. */
19826 struct subfile
*m_last_subfile
= NULL
;
19828 /* When true, record the lines we decode. */
19829 bool m_currently_recording_lines
= false;
19831 /* The last line number that was recorded, used to coalesce
19832 consecutive entries for the same line. This can happen, for
19833 example, when discriminators are present. PR 17276. */
19834 unsigned int m_last_line
= 0;
19835 bool m_line_has_non_zero_discriminator
= false;
19839 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
19841 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
19842 / m_line_header
->maximum_ops_per_instruction
)
19843 * m_line_header
->minimum_instruction_length
);
19844 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19845 m_op_index
= ((m_op_index
+ adjust
)
19846 % m_line_header
->maximum_ops_per_instruction
);
19850 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
19852 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
19853 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
19854 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
19855 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
19856 / m_line_header
->maximum_ops_per_instruction
)
19857 * m_line_header
->minimum_instruction_length
);
19858 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19859 m_op_index
= ((m_op_index
+ adj_opcode_d
)
19860 % m_line_header
->maximum_ops_per_instruction
);
19862 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
19863 advance_line (line_delta
);
19864 record_line (false);
19865 m_discriminator
= 0;
19869 lnp_state_machine::handle_set_file (file_name_index file
)
19873 const file_entry
*fe
= current_file ();
19875 dwarf2_debug_line_missing_file_complaint ();
19876 else if (m_record_lines_p
)
19878 const char *dir
= fe
->include_dir (m_line_header
);
19880 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
19881 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19882 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
19887 lnp_state_machine::handle_const_add_pc ()
19890 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
19893 = (((m_op_index
+ adjust
)
19894 / m_line_header
->maximum_ops_per_instruction
)
19895 * m_line_header
->minimum_instruction_length
);
19897 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19898 m_op_index
= ((m_op_index
+ adjust
)
19899 % m_line_header
->maximum_ops_per_instruction
);
19902 /* Return non-zero if we should add LINE to the line number table.
19903 LINE is the line to add, LAST_LINE is the last line that was added,
19904 LAST_SUBFILE is the subfile for LAST_LINE.
19905 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
19906 had a non-zero discriminator.
19908 We have to be careful in the presence of discriminators.
19909 E.g., for this line:
19911 for (i = 0; i < 100000; i++);
19913 clang can emit four line number entries for that one line,
19914 each with a different discriminator.
19915 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
19917 However, we want gdb to coalesce all four entries into one.
19918 Otherwise the user could stepi into the middle of the line and
19919 gdb would get confused about whether the pc really was in the
19920 middle of the line.
19922 Things are further complicated by the fact that two consecutive
19923 line number entries for the same line is a heuristic used by gcc
19924 to denote the end of the prologue. So we can't just discard duplicate
19925 entries, we have to be selective about it. The heuristic we use is
19926 that we only collapse consecutive entries for the same line if at least
19927 one of those entries has a non-zero discriminator. PR 17276.
19929 Note: Addresses in the line number state machine can never go backwards
19930 within one sequence, thus this coalescing is ok. */
19933 dwarf_record_line_p (struct dwarf2_cu
*cu
,
19934 unsigned int line
, unsigned int last_line
,
19935 int line_has_non_zero_discriminator
,
19936 struct subfile
*last_subfile
)
19938 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
19940 if (line
!= last_line
)
19942 /* Same line for the same file that we've seen already.
19943 As a last check, for pr 17276, only record the line if the line
19944 has never had a non-zero discriminator. */
19945 if (!line_has_non_zero_discriminator
)
19950 /* Use the CU's builder to record line number LINE beginning at
19951 address ADDRESS in the line table of subfile SUBFILE. */
19954 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19955 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
19956 struct dwarf2_cu
*cu
)
19958 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
19960 if (dwarf_line_debug
)
19962 fprintf_unfiltered (gdb_stdlog
,
19963 "Recording line %u, file %s, address %s\n",
19964 line
, lbasename (subfile
->name
),
19965 paddress (gdbarch
, address
));
19969 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
19972 /* Subroutine of dwarf_decode_lines_1 to simplify it.
19973 Mark the end of a set of line number records.
19974 The arguments are the same as for dwarf_record_line_1.
19975 If SUBFILE is NULL the request is ignored. */
19978 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19979 CORE_ADDR address
, struct dwarf2_cu
*cu
)
19981 if (subfile
== NULL
)
19984 if (dwarf_line_debug
)
19986 fprintf_unfiltered (gdb_stdlog
,
19987 "Finishing current line, file %s, address %s\n",
19988 lbasename (subfile
->name
),
19989 paddress (gdbarch
, address
));
19992 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
19996 lnp_state_machine::record_line (bool end_sequence
)
19998 if (dwarf_line_debug
)
20000 fprintf_unfiltered (gdb_stdlog
,
20001 "Processing actual line %u: file %u,"
20002 " address %s, is_stmt %u, discrim %u%s\n",
20004 paddress (m_gdbarch
, m_address
),
20005 m_is_stmt
, m_discriminator
,
20006 (end_sequence
? "\t(end sequence)" : ""));
20009 file_entry
*fe
= current_file ();
20012 dwarf2_debug_line_missing_file_complaint ();
20013 /* For now we ignore lines not starting on an instruction boundary.
20014 But not when processing end_sequence for compatibility with the
20015 previous version of the code. */
20016 else if (m_op_index
== 0 || end_sequence
)
20018 fe
->included_p
= 1;
20019 if (m_record_lines_p
)
20021 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20024 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20025 m_currently_recording_lines
? m_cu
: nullptr);
20030 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
20032 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20033 m_line_has_non_zero_discriminator
,
20036 buildsym_compunit
*builder
= m_cu
->get_builder ();
20037 dwarf_record_line_1 (m_gdbarch
,
20038 builder
->get_current_subfile (),
20039 m_line
, m_address
, is_stmt
,
20040 m_currently_recording_lines
? m_cu
: nullptr);
20042 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20043 m_last_line
= m_line
;
20049 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20050 line_header
*lh
, bool record_lines_p
)
20054 m_record_lines_p
= record_lines_p
;
20055 m_line_header
= lh
;
20057 m_currently_recording_lines
= true;
20059 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20060 was a line entry for it so that the backend has a chance to adjust it
20061 and also record it in case it needs it. This is currently used by MIPS
20062 code, cf. `mips_adjust_dwarf2_line'. */
20063 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20064 m_is_stmt
= lh
->default_is_stmt
;
20065 m_discriminator
= 0;
20069 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20070 const gdb_byte
*line_ptr
,
20071 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20073 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20074 the pc range of the CU. However, we restrict the test to only ADDRESS
20075 values of zero to preserve GDB's previous behaviour which is to handle
20076 the specific case of a function being GC'd by the linker. */
20078 if (address
== 0 && address
< unrelocated_lowpc
)
20080 /* This line table is for a function which has been
20081 GCd by the linker. Ignore it. PR gdb/12528 */
20083 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20084 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20086 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20087 line_offset
, objfile_name (objfile
));
20088 m_currently_recording_lines
= false;
20089 /* Note: m_currently_recording_lines is left as false until we see
20090 DW_LNE_end_sequence. */
20094 /* Subroutine of dwarf_decode_lines to simplify it.
20095 Process the line number information in LH.
20096 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20097 program in order to set included_p for every referenced header. */
20100 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20101 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20103 const gdb_byte
*line_ptr
, *extended_end
;
20104 const gdb_byte
*line_end
;
20105 unsigned int bytes_read
, extended_len
;
20106 unsigned char op_code
, extended_op
;
20107 CORE_ADDR baseaddr
;
20108 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20109 bfd
*abfd
= objfile
->obfd
;
20110 struct gdbarch
*gdbarch
= objfile
->arch ();
20111 /* True if we're recording line info (as opposed to building partial
20112 symtabs and just interested in finding include files mentioned by
20113 the line number program). */
20114 bool record_lines_p
= !decode_for_pst_p
;
20116 baseaddr
= objfile
->text_section_offset ();
20118 line_ptr
= lh
->statement_program_start
;
20119 line_end
= lh
->statement_program_end
;
20121 /* Read the statement sequences until there's nothing left. */
20122 while (line_ptr
< line_end
)
20124 /* The DWARF line number program state machine. Reset the state
20125 machine at the start of each sequence. */
20126 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20127 bool end_sequence
= false;
20129 if (record_lines_p
)
20131 /* Start a subfile for the current file of the state
20133 const file_entry
*fe
= state_machine
.current_file ();
20136 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20139 /* Decode the table. */
20140 while (line_ptr
< line_end
&& !end_sequence
)
20142 op_code
= read_1_byte (abfd
, line_ptr
);
20145 if (op_code
>= lh
->opcode_base
)
20147 /* Special opcode. */
20148 state_machine
.handle_special_opcode (op_code
);
20150 else switch (op_code
)
20152 case DW_LNS_extended_op
:
20153 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20155 line_ptr
+= bytes_read
;
20156 extended_end
= line_ptr
+ extended_len
;
20157 extended_op
= read_1_byte (abfd
, line_ptr
);
20159 switch (extended_op
)
20161 case DW_LNE_end_sequence
:
20162 state_machine
.handle_end_sequence ();
20163 end_sequence
= true;
20165 case DW_LNE_set_address
:
20168 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
20169 line_ptr
+= bytes_read
;
20171 state_machine
.check_line_address (cu
, line_ptr
,
20172 lowpc
- baseaddr
, address
);
20173 state_machine
.handle_set_address (baseaddr
, address
);
20176 case DW_LNE_define_file
:
20178 const char *cur_file
;
20179 unsigned int mod_time
, length
;
20182 cur_file
= read_direct_string (abfd
, line_ptr
,
20184 line_ptr
+= bytes_read
;
20185 dindex
= (dir_index
)
20186 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20187 line_ptr
+= bytes_read
;
20189 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20190 line_ptr
+= bytes_read
;
20192 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20193 line_ptr
+= bytes_read
;
20194 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20197 case DW_LNE_set_discriminator
:
20199 /* The discriminator is not interesting to the
20200 debugger; just ignore it. We still need to
20201 check its value though:
20202 if there are consecutive entries for the same
20203 (non-prologue) line we want to coalesce them.
20206 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20207 line_ptr
+= bytes_read
;
20209 state_machine
.handle_set_discriminator (discr
);
20213 complaint (_("mangled .debug_line section"));
20216 /* Make sure that we parsed the extended op correctly. If e.g.
20217 we expected a different address size than the producer used,
20218 we may have read the wrong number of bytes. */
20219 if (line_ptr
!= extended_end
)
20221 complaint (_("mangled .debug_line section"));
20226 state_machine
.handle_copy ();
20228 case DW_LNS_advance_pc
:
20231 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20232 line_ptr
+= bytes_read
;
20234 state_machine
.handle_advance_pc (adjust
);
20237 case DW_LNS_advance_line
:
20240 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20241 line_ptr
+= bytes_read
;
20243 state_machine
.handle_advance_line (line_delta
);
20246 case DW_LNS_set_file
:
20248 file_name_index file
20249 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20251 line_ptr
+= bytes_read
;
20253 state_machine
.handle_set_file (file
);
20256 case DW_LNS_set_column
:
20257 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20258 line_ptr
+= bytes_read
;
20260 case DW_LNS_negate_stmt
:
20261 state_machine
.handle_negate_stmt ();
20263 case DW_LNS_set_basic_block
:
20265 /* Add to the address register of the state machine the
20266 address increment value corresponding to special opcode
20267 255. I.e., this value is scaled by the minimum
20268 instruction length since special opcode 255 would have
20269 scaled the increment. */
20270 case DW_LNS_const_add_pc
:
20271 state_machine
.handle_const_add_pc ();
20273 case DW_LNS_fixed_advance_pc
:
20275 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20278 state_machine
.handle_fixed_advance_pc (addr_adj
);
20283 /* Unknown standard opcode, ignore it. */
20286 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20288 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20289 line_ptr
+= bytes_read
;
20296 dwarf2_debug_line_missing_end_sequence_complaint ();
20298 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20299 in which case we still finish recording the last line). */
20300 state_machine
.record_line (true);
20304 /* Decode the Line Number Program (LNP) for the given line_header
20305 structure and CU. The actual information extracted and the type
20306 of structures created from the LNP depends on the value of PST.
20308 1. If PST is NULL, then this procedure uses the data from the program
20309 to create all necessary symbol tables, and their linetables.
20311 2. If PST is not NULL, this procedure reads the program to determine
20312 the list of files included by the unit represented by PST, and
20313 builds all the associated partial symbol tables.
20315 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20316 It is used for relative paths in the line table.
20317 NOTE: When processing partial symtabs (pst != NULL),
20318 comp_dir == pst->dirname.
20320 NOTE: It is important that psymtabs have the same file name (via strcmp)
20321 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20322 symtab we don't use it in the name of the psymtabs we create.
20323 E.g. expand_line_sal requires this when finding psymtabs to expand.
20324 A good testcase for this is mb-inline.exp.
20326 LOWPC is the lowest address in CU (or 0 if not known).
20328 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20329 for its PC<->lines mapping information. Otherwise only the filename
20330 table is read in. */
20333 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20334 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
20335 CORE_ADDR lowpc
, int decode_mapping
)
20337 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20338 const int decode_for_pst_p
= (pst
!= NULL
);
20340 if (decode_mapping
)
20341 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20343 if (decode_for_pst_p
)
20345 /* Now that we're done scanning the Line Header Program, we can
20346 create the psymtab of each included file. */
20347 for (auto &file_entry
: lh
->file_names ())
20348 if (file_entry
.included_p
== 1)
20350 gdb::unique_xmalloc_ptr
<char> name_holder
;
20351 const char *include_name
=
20352 psymtab_include_file_name (lh
, file_entry
, pst
,
20353 comp_dir
, &name_holder
);
20354 if (include_name
!= NULL
)
20355 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20360 /* Make sure a symtab is created for every file, even files
20361 which contain only variables (i.e. no code with associated
20363 buildsym_compunit
*builder
= cu
->get_builder ();
20364 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
20366 for (auto &fe
: lh
->file_names ())
20368 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20369 if (builder
->get_current_subfile ()->symtab
== NULL
)
20371 builder
->get_current_subfile ()->symtab
20372 = allocate_symtab (cust
,
20373 builder
->get_current_subfile ()->name
);
20375 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
20380 /* Start a subfile for DWARF. FILENAME is the name of the file and
20381 DIRNAME the name of the source directory which contains FILENAME
20382 or NULL if not known.
20383 This routine tries to keep line numbers from identical absolute and
20384 relative file names in a common subfile.
20386 Using the `list' example from the GDB testsuite, which resides in
20387 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20388 of /srcdir/list0.c yields the following debugging information for list0.c:
20390 DW_AT_name: /srcdir/list0.c
20391 DW_AT_comp_dir: /compdir
20392 files.files[0].name: list0.h
20393 files.files[0].dir: /srcdir
20394 files.files[1].name: list0.c
20395 files.files[1].dir: /srcdir
20397 The line number information for list0.c has to end up in a single
20398 subfile, so that `break /srcdir/list0.c:1' works as expected.
20399 start_subfile will ensure that this happens provided that we pass the
20400 concatenation of files.files[1].dir and files.files[1].name as the
20404 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
20405 const char *dirname
)
20407 gdb::unique_xmalloc_ptr
<char> copy
;
20409 /* In order not to lose the line information directory,
20410 we concatenate it to the filename when it makes sense.
20411 Note that the Dwarf3 standard says (speaking of filenames in line
20412 information): ``The directory index is ignored for file names
20413 that represent full path names''. Thus ignoring dirname in the
20414 `else' branch below isn't an issue. */
20416 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
20418 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
20419 filename
= copy
.get ();
20422 cu
->get_builder ()->start_subfile (filename
);
20425 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
20426 buildsym_compunit constructor. */
20428 struct compunit_symtab
*
20429 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
20432 gdb_assert (m_builder
== nullptr);
20434 m_builder
.reset (new struct buildsym_compunit
20435 (per_cu
->dwarf2_per_objfile
->objfile
,
20436 name
, comp_dir
, language
, low_pc
));
20438 list_in_scope
= get_builder ()->get_file_symbols ();
20440 get_builder ()->record_debugformat ("DWARF 2");
20441 get_builder ()->record_producer (producer
);
20443 processing_has_namespace_info
= false;
20445 return get_builder ()->get_compunit_symtab ();
20449 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
20450 struct dwarf2_cu
*cu
)
20452 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20453 struct comp_unit_head
*cu_header
= &cu
->header
;
20455 /* NOTE drow/2003-01-30: There used to be a comment and some special
20456 code here to turn a symbol with DW_AT_external and a
20457 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
20458 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
20459 with some versions of binutils) where shared libraries could have
20460 relocations against symbols in their debug information - the
20461 minimal symbol would have the right address, but the debug info
20462 would not. It's no longer necessary, because we will explicitly
20463 apply relocations when we read in the debug information now. */
20465 /* A DW_AT_location attribute with no contents indicates that a
20466 variable has been optimized away. */
20467 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0)
20469 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20473 /* Handle one degenerate form of location expression specially, to
20474 preserve GDB's previous behavior when section offsets are
20475 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
20476 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
20478 if (attr
->form_is_block ()
20479 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
20480 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
20481 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
20482 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
20483 && (DW_BLOCK (attr
)->size
20484 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
20486 unsigned int dummy
;
20488 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
20489 SET_SYMBOL_VALUE_ADDRESS
20490 (sym
, cu
->header
.read_address (objfile
->obfd
,
20491 DW_BLOCK (attr
)->data
+ 1,
20494 SET_SYMBOL_VALUE_ADDRESS
20495 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
20497 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
20498 fixup_symbol_section (sym
, objfile
);
20499 SET_SYMBOL_VALUE_ADDRESS
20501 SYMBOL_VALUE_ADDRESS (sym
)
20502 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
20506 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
20507 expression evaluator, and use LOC_COMPUTED only when necessary
20508 (i.e. when the value of a register or memory location is
20509 referenced, or a thread-local block, etc.). Then again, it might
20510 not be worthwhile. I'm assuming that it isn't unless performance
20511 or memory numbers show me otherwise. */
20513 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
20515 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
20516 cu
->has_loclist
= true;
20519 /* Given a pointer to a DWARF information entry, figure out if we need
20520 to make a symbol table entry for it, and if so, create a new entry
20521 and return a pointer to it.
20522 If TYPE is NULL, determine symbol type from the die, otherwise
20523 used the passed type.
20524 If SPACE is not NULL, use it to hold the new symbol. If it is
20525 NULL, allocate a new symbol on the objfile's obstack. */
20527 static struct symbol
*
20528 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
20529 struct symbol
*space
)
20531 struct dwarf2_per_objfile
*dwarf2_per_objfile
20532 = cu
->per_cu
->dwarf2_per_objfile
;
20533 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20534 struct gdbarch
*gdbarch
= objfile
->arch ();
20535 struct symbol
*sym
= NULL
;
20537 struct attribute
*attr
= NULL
;
20538 struct attribute
*attr2
= NULL
;
20539 CORE_ADDR baseaddr
;
20540 struct pending
**list_to_add
= NULL
;
20542 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
20544 baseaddr
= objfile
->text_section_offset ();
20546 name
= dwarf2_name (die
, cu
);
20549 const char *linkagename
;
20550 int suppress_add
= 0;
20555 sym
= allocate_symbol (objfile
);
20556 OBJSTAT (objfile
, n_syms
++);
20558 /* Cache this symbol's name and the name's demangled form (if any). */
20559 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
20560 linkagename
= dwarf2_physname (name
, die
, cu
);
20561 sym
->compute_and_set_names (linkagename
, false, objfile
->per_bfd
);
20563 /* Fortran does not have mangling standard and the mangling does differ
20564 between gfortran, iFort etc. */
20565 if (cu
->language
== language_fortran
20566 && symbol_get_demangled_name (sym
) == NULL
)
20567 sym
->set_demangled_name (dwarf2_full_name (name
, die
, cu
), NULL
);
20569 /* Default assumptions.
20570 Use the passed type or decode it from the die. */
20571 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20572 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20574 SYMBOL_TYPE (sym
) = type
;
20576 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
20577 attr
= dwarf2_attr (die
,
20578 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
20580 if (attr
!= nullptr)
20582 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
20585 attr
= dwarf2_attr (die
,
20586 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
20588 if (attr
!= nullptr)
20590 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
20591 struct file_entry
*fe
;
20593 if (cu
->line_header
!= NULL
)
20594 fe
= cu
->line_header
->file_name_at (file_index
);
20599 complaint (_("file index out of range"));
20601 symbol_set_symtab (sym
, fe
->symtab
);
20607 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
20608 if (attr
!= nullptr)
20612 addr
= attr
->value_as_address ();
20613 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
20614 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
20616 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
20617 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
20618 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
20619 add_symbol_to_list (sym
, cu
->list_in_scope
);
20621 case DW_TAG_subprogram
:
20622 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20624 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20625 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20626 if ((attr2
&& (DW_UNSND (attr2
) != 0))
20627 || cu
->language
== language_ada
20628 || cu
->language
== language_fortran
)
20630 /* Subprograms marked external are stored as a global symbol.
20631 Ada and Fortran subprograms, whether marked external or
20632 not, are always stored as a global symbol, because we want
20633 to be able to access them globally. For instance, we want
20634 to be able to break on a nested subprogram without having
20635 to specify the context. */
20636 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20640 list_to_add
= cu
->list_in_scope
;
20643 case DW_TAG_inlined_subroutine
:
20644 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20646 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20647 SYMBOL_INLINED (sym
) = 1;
20648 list_to_add
= cu
->list_in_scope
;
20650 case DW_TAG_template_value_param
:
20652 /* Fall through. */
20653 case DW_TAG_constant
:
20654 case DW_TAG_variable
:
20655 case DW_TAG_member
:
20656 /* Compilation with minimal debug info may result in
20657 variables with missing type entries. Change the
20658 misleading `void' type to something sensible. */
20659 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
20660 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
20662 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20663 /* In the case of DW_TAG_member, we should only be called for
20664 static const members. */
20665 if (die
->tag
== DW_TAG_member
)
20667 /* dwarf2_add_field uses die_is_declaration,
20668 so we do the same. */
20669 gdb_assert (die_is_declaration (die
, cu
));
20672 if (attr
!= nullptr)
20674 dwarf2_const_value (attr
, sym
, cu
);
20675 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20678 if (attr2
&& (DW_UNSND (attr2
) != 0))
20679 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20681 list_to_add
= cu
->list_in_scope
;
20685 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20686 if (attr
!= nullptr)
20688 var_decode_location (attr
, sym
, cu
);
20689 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20691 /* Fortran explicitly imports any global symbols to the local
20692 scope by DW_TAG_common_block. */
20693 if (cu
->language
== language_fortran
&& die
->parent
20694 && die
->parent
->tag
== DW_TAG_common_block
)
20697 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20698 && SYMBOL_VALUE_ADDRESS (sym
) == 0
20699 && !dwarf2_per_objfile
->has_section_at_zero
)
20701 /* When a static variable is eliminated by the linker,
20702 the corresponding debug information is not stripped
20703 out, but the variable address is set to null;
20704 do not add such variables into symbol table. */
20706 else if (attr2
&& (DW_UNSND (attr2
) != 0))
20708 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20709 && (objfile
->flags
& OBJF_MAINLINE
) == 0
20710 && dwarf2_per_objfile
->can_copy
)
20712 /* A global static variable might be subject to
20713 copy relocation. We first check for a local
20714 minsym, though, because maybe the symbol was
20715 marked hidden, in which case this would not
20717 bound_minimal_symbol found
20718 = (lookup_minimal_symbol_linkage
20719 (sym
->linkage_name (), objfile
));
20720 if (found
.minsym
!= nullptr)
20721 sym
->maybe_copied
= 1;
20724 /* A variable with DW_AT_external is never static,
20725 but it may be block-scoped. */
20727 = ((cu
->list_in_scope
20728 == cu
->get_builder ()->get_file_symbols ())
20729 ? cu
->get_builder ()->get_global_symbols ()
20730 : cu
->list_in_scope
);
20733 list_to_add
= cu
->list_in_scope
;
20737 /* We do not know the address of this symbol.
20738 If it is an external symbol and we have type information
20739 for it, enter the symbol as a LOC_UNRESOLVED symbol.
20740 The address of the variable will then be determined from
20741 the minimal symbol table whenever the variable is
20743 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20745 /* Fortran explicitly imports any global symbols to the local
20746 scope by DW_TAG_common_block. */
20747 if (cu
->language
== language_fortran
&& die
->parent
20748 && die
->parent
->tag
== DW_TAG_common_block
)
20750 /* SYMBOL_CLASS doesn't matter here because
20751 read_common_block is going to reset it. */
20753 list_to_add
= cu
->list_in_scope
;
20755 else if (attr2
&& (DW_UNSND (attr2
) != 0)
20756 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
20758 /* A variable with DW_AT_external is never static, but it
20759 may be block-scoped. */
20761 = ((cu
->list_in_scope
20762 == cu
->get_builder ()->get_file_symbols ())
20763 ? cu
->get_builder ()->get_global_symbols ()
20764 : cu
->list_in_scope
);
20766 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20768 else if (!die_is_declaration (die
, cu
))
20770 /* Use the default LOC_OPTIMIZED_OUT class. */
20771 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
20773 list_to_add
= cu
->list_in_scope
;
20777 case DW_TAG_formal_parameter
:
20779 /* If we are inside a function, mark this as an argument. If
20780 not, we might be looking at an argument to an inlined function
20781 when we do not have enough information to show inlined frames;
20782 pretend it's a local variable in that case so that the user can
20784 struct context_stack
*curr
20785 = cu
->get_builder ()->get_current_context_stack ();
20786 if (curr
!= nullptr && curr
->name
!= nullptr)
20787 SYMBOL_IS_ARGUMENT (sym
) = 1;
20788 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20789 if (attr
!= nullptr)
20791 var_decode_location (attr
, sym
, cu
);
20793 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20794 if (attr
!= nullptr)
20796 dwarf2_const_value (attr
, sym
, cu
);
20799 list_to_add
= cu
->list_in_scope
;
20802 case DW_TAG_unspecified_parameters
:
20803 /* From varargs functions; gdb doesn't seem to have any
20804 interest in this information, so just ignore it for now.
20807 case DW_TAG_template_type_param
:
20809 /* Fall through. */
20810 case DW_TAG_class_type
:
20811 case DW_TAG_interface_type
:
20812 case DW_TAG_structure_type
:
20813 case DW_TAG_union_type
:
20814 case DW_TAG_set_type
:
20815 case DW_TAG_enumeration_type
:
20816 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20817 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
20820 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
20821 really ever be static objects: otherwise, if you try
20822 to, say, break of a class's method and you're in a file
20823 which doesn't mention that class, it won't work unless
20824 the check for all static symbols in lookup_symbol_aux
20825 saves you. See the OtherFileClass tests in
20826 gdb.c++/namespace.exp. */
20830 buildsym_compunit
*builder
= cu
->get_builder ();
20832 = (cu
->list_in_scope
== builder
->get_file_symbols ()
20833 && cu
->language
== language_cplus
20834 ? builder
->get_global_symbols ()
20835 : cu
->list_in_scope
);
20837 /* The semantics of C++ state that "struct foo {
20838 ... }" also defines a typedef for "foo". */
20839 if (cu
->language
== language_cplus
20840 || cu
->language
== language_ada
20841 || cu
->language
== language_d
20842 || cu
->language
== language_rust
)
20844 /* The symbol's name is already allocated along
20845 with this objfile, so we don't need to
20846 duplicate it for the type. */
20847 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
20848 TYPE_NAME (SYMBOL_TYPE (sym
)) = sym
->search_name ();
20853 case DW_TAG_typedef
:
20854 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20855 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20856 list_to_add
= cu
->list_in_scope
;
20858 case DW_TAG_base_type
:
20859 case DW_TAG_subrange_type
:
20860 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20861 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20862 list_to_add
= cu
->list_in_scope
;
20864 case DW_TAG_enumerator
:
20865 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20866 if (attr
!= nullptr)
20868 dwarf2_const_value (attr
, sym
, cu
);
20871 /* NOTE: carlton/2003-11-10: See comment above in the
20872 DW_TAG_class_type, etc. block. */
20875 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
20876 && cu
->language
== language_cplus
20877 ? cu
->get_builder ()->get_global_symbols ()
20878 : cu
->list_in_scope
);
20881 case DW_TAG_imported_declaration
:
20882 case DW_TAG_namespace
:
20883 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20884 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20886 case DW_TAG_module
:
20887 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20888 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
20889 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20891 case DW_TAG_common_block
:
20892 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
20893 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
20894 add_symbol_to_list (sym
, cu
->list_in_scope
);
20897 /* Not a tag we recognize. Hopefully we aren't processing
20898 trash data, but since we must specifically ignore things
20899 we don't recognize, there is nothing else we should do at
20901 complaint (_("unsupported tag: '%s'"),
20902 dwarf_tag_name (die
->tag
));
20908 sym
->hash_next
= objfile
->template_symbols
;
20909 objfile
->template_symbols
= sym
;
20910 list_to_add
= NULL
;
20913 if (list_to_add
!= NULL
)
20914 add_symbol_to_list (sym
, list_to_add
);
20916 /* For the benefit of old versions of GCC, check for anonymous
20917 namespaces based on the demangled name. */
20918 if (!cu
->processing_has_namespace_info
20919 && cu
->language
== language_cplus
)
20920 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
20925 /* Given an attr with a DW_FORM_dataN value in host byte order,
20926 zero-extend it as appropriate for the symbol's type. The DWARF
20927 standard (v4) is not entirely clear about the meaning of using
20928 DW_FORM_dataN for a constant with a signed type, where the type is
20929 wider than the data. The conclusion of a discussion on the DWARF
20930 list was that this is unspecified. We choose to always zero-extend
20931 because that is the interpretation long in use by GCC. */
20934 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
20935 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
20937 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20938 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
20939 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
20940 LONGEST l
= DW_UNSND (attr
);
20942 if (bits
< sizeof (*value
) * 8)
20944 l
&= ((LONGEST
) 1 << bits
) - 1;
20947 else if (bits
== sizeof (*value
) * 8)
20951 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
20952 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
20959 /* Read a constant value from an attribute. Either set *VALUE, or if
20960 the value does not fit in *VALUE, set *BYTES - either already
20961 allocated on the objfile obstack, or newly allocated on OBSTACK,
20962 or, set *BATON, if we translated the constant to a location
20966 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
20967 const char *name
, struct obstack
*obstack
,
20968 struct dwarf2_cu
*cu
,
20969 LONGEST
*value
, const gdb_byte
**bytes
,
20970 struct dwarf2_locexpr_baton
**baton
)
20972 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20973 struct comp_unit_head
*cu_header
= &cu
->header
;
20974 struct dwarf_block
*blk
;
20975 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
20976 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20982 switch (attr
->form
)
20985 case DW_FORM_addrx
:
20986 case DW_FORM_GNU_addr_index
:
20990 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
20991 dwarf2_const_value_length_mismatch_complaint (name
,
20992 cu_header
->addr_size
,
20993 TYPE_LENGTH (type
));
20994 /* Symbols of this form are reasonably rare, so we just
20995 piggyback on the existing location code rather than writing
20996 a new implementation of symbol_computed_ops. */
20997 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
20998 (*baton
)->per_cu
= cu
->per_cu
;
20999 gdb_assert ((*baton
)->per_cu
);
21001 (*baton
)->size
= 2 + cu_header
->addr_size
;
21002 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21003 (*baton
)->data
= data
;
21005 data
[0] = DW_OP_addr
;
21006 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21007 byte_order
, DW_ADDR (attr
));
21008 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21011 case DW_FORM_string
:
21014 case DW_FORM_GNU_str_index
:
21015 case DW_FORM_GNU_strp_alt
:
21016 /* DW_STRING is already allocated on the objfile obstack, point
21018 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21020 case DW_FORM_block1
:
21021 case DW_FORM_block2
:
21022 case DW_FORM_block4
:
21023 case DW_FORM_block
:
21024 case DW_FORM_exprloc
:
21025 case DW_FORM_data16
:
21026 blk
= DW_BLOCK (attr
);
21027 if (TYPE_LENGTH (type
) != blk
->size
)
21028 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21029 TYPE_LENGTH (type
));
21030 *bytes
= blk
->data
;
21033 /* The DW_AT_const_value attributes are supposed to carry the
21034 symbol's value "represented as it would be on the target
21035 architecture." By the time we get here, it's already been
21036 converted to host endianness, so we just need to sign- or
21037 zero-extend it as appropriate. */
21038 case DW_FORM_data1
:
21039 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21041 case DW_FORM_data2
:
21042 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21044 case DW_FORM_data4
:
21045 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21047 case DW_FORM_data8
:
21048 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21051 case DW_FORM_sdata
:
21052 case DW_FORM_implicit_const
:
21053 *value
= DW_SND (attr
);
21056 case DW_FORM_udata
:
21057 *value
= DW_UNSND (attr
);
21061 complaint (_("unsupported const value attribute form: '%s'"),
21062 dwarf_form_name (attr
->form
));
21069 /* Copy constant value from an attribute to a symbol. */
21072 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21073 struct dwarf2_cu
*cu
)
21075 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21077 const gdb_byte
*bytes
;
21078 struct dwarf2_locexpr_baton
*baton
;
21080 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21081 sym
->print_name (),
21082 &objfile
->objfile_obstack
, cu
,
21083 &value
, &bytes
, &baton
);
21087 SYMBOL_LOCATION_BATON (sym
) = baton
;
21088 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21090 else if (bytes
!= NULL
)
21092 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21093 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21097 SYMBOL_VALUE (sym
) = value
;
21098 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21102 /* Return the type of the die in question using its DW_AT_type attribute. */
21104 static struct type
*
21105 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21107 struct attribute
*type_attr
;
21109 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21112 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21113 /* A missing DW_AT_type represents a void type. */
21114 return objfile_type (objfile
)->builtin_void
;
21117 return lookup_die_type (die
, type_attr
, cu
);
21120 /* True iff CU's producer generates GNAT Ada auxiliary information
21121 that allows to find parallel types through that information instead
21122 of having to do expensive parallel lookups by type name. */
21125 need_gnat_info (struct dwarf2_cu
*cu
)
21127 /* Assume that the Ada compiler was GNAT, which always produces
21128 the auxiliary information. */
21129 return (cu
->language
== language_ada
);
21132 /* Return the auxiliary type of the die in question using its
21133 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21134 attribute is not present. */
21136 static struct type
*
21137 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21139 struct attribute
*type_attr
;
21141 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21145 return lookup_die_type (die
, type_attr
, cu
);
21148 /* If DIE has a descriptive_type attribute, then set the TYPE's
21149 descriptive type accordingly. */
21152 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21153 struct dwarf2_cu
*cu
)
21155 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21157 if (descriptive_type
)
21159 ALLOCATE_GNAT_AUX_TYPE (type
);
21160 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21164 /* Return the containing type of the die in question using its
21165 DW_AT_containing_type attribute. */
21167 static struct type
*
21168 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21170 struct attribute
*type_attr
;
21171 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21173 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21175 error (_("Dwarf Error: Problem turning containing type into gdb type "
21176 "[in module %s]"), objfile_name (objfile
));
21178 return lookup_die_type (die
, type_attr
, cu
);
21181 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21183 static struct type
*
21184 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21186 struct dwarf2_per_objfile
*dwarf2_per_objfile
21187 = cu
->per_cu
->dwarf2_per_objfile
;
21188 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21191 std::string message
21192 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
21193 objfile_name (objfile
),
21194 sect_offset_str (cu
->header
.sect_off
),
21195 sect_offset_str (die
->sect_off
));
21196 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
21198 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21201 /* Look up the type of DIE in CU using its type attribute ATTR.
21202 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21203 DW_AT_containing_type.
21204 If there is no type substitute an error marker. */
21206 static struct type
*
21207 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21208 struct dwarf2_cu
*cu
)
21210 struct dwarf2_per_objfile
*dwarf2_per_objfile
21211 = cu
->per_cu
->dwarf2_per_objfile
;
21212 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21213 struct type
*this_type
;
21215 gdb_assert (attr
->name
== DW_AT_type
21216 || attr
->name
== DW_AT_GNAT_descriptive_type
21217 || attr
->name
== DW_AT_containing_type
);
21219 /* First see if we have it cached. */
21221 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21223 struct dwarf2_per_cu_data
*per_cu
;
21224 sect_offset sect_off
= attr
->get_ref_die_offset ();
21226 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21227 dwarf2_per_objfile
);
21228 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21230 else if (attr
->form_is_ref ())
21232 sect_offset sect_off
= attr
->get_ref_die_offset ();
21234 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21236 else if (attr
->form
== DW_FORM_ref_sig8
)
21238 ULONGEST signature
= DW_SIGNATURE (attr
);
21240 return get_signatured_type (die
, signature
, cu
);
21244 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21245 " at %s [in module %s]"),
21246 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21247 objfile_name (objfile
));
21248 return build_error_marker_type (cu
, die
);
21251 /* If not cached we need to read it in. */
21253 if (this_type
== NULL
)
21255 struct die_info
*type_die
= NULL
;
21256 struct dwarf2_cu
*type_cu
= cu
;
21258 if (attr
->form_is_ref ())
21259 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21260 if (type_die
== NULL
)
21261 return build_error_marker_type (cu
, die
);
21262 /* If we find the type now, it's probably because the type came
21263 from an inter-CU reference and the type's CU got expanded before
21265 this_type
= read_type_die (type_die
, type_cu
);
21268 /* If we still don't have a type use an error marker. */
21270 if (this_type
== NULL
)
21271 return build_error_marker_type (cu
, die
);
21276 /* Return the type in DIE, CU.
21277 Returns NULL for invalid types.
21279 This first does a lookup in die_type_hash,
21280 and only reads the die in if necessary.
21282 NOTE: This can be called when reading in partial or full symbols. */
21284 static struct type
*
21285 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21287 struct type
*this_type
;
21289 this_type
= get_die_type (die
, cu
);
21293 return read_type_die_1 (die
, cu
);
21296 /* Read the type in DIE, CU.
21297 Returns NULL for invalid types. */
21299 static struct type
*
21300 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21302 struct type
*this_type
= NULL
;
21306 case DW_TAG_class_type
:
21307 case DW_TAG_interface_type
:
21308 case DW_TAG_structure_type
:
21309 case DW_TAG_union_type
:
21310 this_type
= read_structure_type (die
, cu
);
21312 case DW_TAG_enumeration_type
:
21313 this_type
= read_enumeration_type (die
, cu
);
21315 case DW_TAG_subprogram
:
21316 case DW_TAG_subroutine_type
:
21317 case DW_TAG_inlined_subroutine
:
21318 this_type
= read_subroutine_type (die
, cu
);
21320 case DW_TAG_array_type
:
21321 this_type
= read_array_type (die
, cu
);
21323 case DW_TAG_set_type
:
21324 this_type
= read_set_type (die
, cu
);
21326 case DW_TAG_pointer_type
:
21327 this_type
= read_tag_pointer_type (die
, cu
);
21329 case DW_TAG_ptr_to_member_type
:
21330 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21332 case DW_TAG_reference_type
:
21333 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21335 case DW_TAG_rvalue_reference_type
:
21336 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21338 case DW_TAG_const_type
:
21339 this_type
= read_tag_const_type (die
, cu
);
21341 case DW_TAG_volatile_type
:
21342 this_type
= read_tag_volatile_type (die
, cu
);
21344 case DW_TAG_restrict_type
:
21345 this_type
= read_tag_restrict_type (die
, cu
);
21347 case DW_TAG_string_type
:
21348 this_type
= read_tag_string_type (die
, cu
);
21350 case DW_TAG_typedef
:
21351 this_type
= read_typedef (die
, cu
);
21353 case DW_TAG_subrange_type
:
21354 this_type
= read_subrange_type (die
, cu
);
21356 case DW_TAG_base_type
:
21357 this_type
= read_base_type (die
, cu
);
21359 case DW_TAG_unspecified_type
:
21360 this_type
= read_unspecified_type (die
, cu
);
21362 case DW_TAG_namespace
:
21363 this_type
= read_namespace_type (die
, cu
);
21365 case DW_TAG_module
:
21366 this_type
= read_module_type (die
, cu
);
21368 case DW_TAG_atomic_type
:
21369 this_type
= read_tag_atomic_type (die
, cu
);
21372 complaint (_("unexpected tag in read_type_die: '%s'"),
21373 dwarf_tag_name (die
->tag
));
21380 /* See if we can figure out if the class lives in a namespace. We do
21381 this by looking for a member function; its demangled name will
21382 contain namespace info, if there is any.
21383 Return the computed name or NULL.
21384 Space for the result is allocated on the objfile's obstack.
21385 This is the full-die version of guess_partial_die_structure_name.
21386 In this case we know DIE has no useful parent. */
21388 static const char *
21389 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21391 struct die_info
*spec_die
;
21392 struct dwarf2_cu
*spec_cu
;
21393 struct die_info
*child
;
21394 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21397 spec_die
= die_specification (die
, &spec_cu
);
21398 if (spec_die
!= NULL
)
21404 for (child
= die
->child
;
21406 child
= child
->sibling
)
21408 if (child
->tag
== DW_TAG_subprogram
)
21410 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21412 if (linkage_name
!= NULL
)
21414 gdb::unique_xmalloc_ptr
<char> actual_name
21415 (language_class_name_from_physname (cu
->language_defn
,
21417 const char *name
= NULL
;
21419 if (actual_name
!= NULL
)
21421 const char *die_name
= dwarf2_name (die
, cu
);
21423 if (die_name
!= NULL
21424 && strcmp (die_name
, actual_name
.get ()) != 0)
21426 /* Strip off the class name from the full name.
21427 We want the prefix. */
21428 int die_name_len
= strlen (die_name
);
21429 int actual_name_len
= strlen (actual_name
.get ());
21430 const char *ptr
= actual_name
.get ();
21432 /* Test for '::' as a sanity check. */
21433 if (actual_name_len
> die_name_len
+ 2
21434 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
21435 name
= obstack_strndup (
21436 &objfile
->per_bfd
->storage_obstack
,
21437 ptr
, actual_name_len
- die_name_len
- 2);
21448 /* GCC might emit a nameless typedef that has a linkage name. Determine the
21449 prefix part in such case. See
21450 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21452 static const char *
21453 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21455 struct attribute
*attr
;
21458 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
21459 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
21462 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
21465 attr
= dw2_linkage_name_attr (die
, cu
);
21466 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21469 /* dwarf2_name had to be already called. */
21470 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
21472 /* Strip the base name, keep any leading namespaces/classes. */
21473 base
= strrchr (DW_STRING (attr
), ':');
21474 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
21477 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21478 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
21480 &base
[-1] - DW_STRING (attr
));
21483 /* Return the name of the namespace/class that DIE is defined within,
21484 or "" if we can't tell. The caller should not xfree the result.
21486 For example, if we're within the method foo() in the following
21496 then determine_prefix on foo's die will return "N::C". */
21498 static const char *
21499 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21501 struct dwarf2_per_objfile
*dwarf2_per_objfile
21502 = cu
->per_cu
->dwarf2_per_objfile
;
21503 struct die_info
*parent
, *spec_die
;
21504 struct dwarf2_cu
*spec_cu
;
21505 struct type
*parent_type
;
21506 const char *retval
;
21508 if (cu
->language
!= language_cplus
21509 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
21510 && cu
->language
!= language_rust
)
21513 retval
= anonymous_struct_prefix (die
, cu
);
21517 /* We have to be careful in the presence of DW_AT_specification.
21518 For example, with GCC 3.4, given the code
21522 // Definition of N::foo.
21526 then we'll have a tree of DIEs like this:
21528 1: DW_TAG_compile_unit
21529 2: DW_TAG_namespace // N
21530 3: DW_TAG_subprogram // declaration of N::foo
21531 4: DW_TAG_subprogram // definition of N::foo
21532 DW_AT_specification // refers to die #3
21534 Thus, when processing die #4, we have to pretend that we're in
21535 the context of its DW_AT_specification, namely the contex of die
21538 spec_die
= die_specification (die
, &spec_cu
);
21539 if (spec_die
== NULL
)
21540 parent
= die
->parent
;
21543 parent
= spec_die
->parent
;
21547 if (parent
== NULL
)
21549 else if (parent
->building_fullname
)
21552 const char *parent_name
;
21554 /* It has been seen on RealView 2.2 built binaries,
21555 DW_TAG_template_type_param types actually _defined_ as
21556 children of the parent class:
21559 template class <class Enum> Class{};
21560 Class<enum E> class_e;
21562 1: DW_TAG_class_type (Class)
21563 2: DW_TAG_enumeration_type (E)
21564 3: DW_TAG_enumerator (enum1:0)
21565 3: DW_TAG_enumerator (enum2:1)
21567 2: DW_TAG_template_type_param
21568 DW_AT_type DW_FORM_ref_udata (E)
21570 Besides being broken debug info, it can put GDB into an
21571 infinite loop. Consider:
21573 When we're building the full name for Class<E>, we'll start
21574 at Class, and go look over its template type parameters,
21575 finding E. We'll then try to build the full name of E, and
21576 reach here. We're now trying to build the full name of E,
21577 and look over the parent DIE for containing scope. In the
21578 broken case, if we followed the parent DIE of E, we'd again
21579 find Class, and once again go look at its template type
21580 arguments, etc., etc. Simply don't consider such parent die
21581 as source-level parent of this die (it can't be, the language
21582 doesn't allow it), and break the loop here. */
21583 name
= dwarf2_name (die
, cu
);
21584 parent_name
= dwarf2_name (parent
, cu
);
21585 complaint (_("template param type '%s' defined within parent '%s'"),
21586 name
? name
: "<unknown>",
21587 parent_name
? parent_name
: "<unknown>");
21591 switch (parent
->tag
)
21593 case DW_TAG_namespace
:
21594 parent_type
= read_type_die (parent
, cu
);
21595 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
21596 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
21597 Work around this problem here. */
21598 if (cu
->language
== language_cplus
21599 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
21601 /* We give a name to even anonymous namespaces. */
21602 return TYPE_NAME (parent_type
);
21603 case DW_TAG_class_type
:
21604 case DW_TAG_interface_type
:
21605 case DW_TAG_structure_type
:
21606 case DW_TAG_union_type
:
21607 case DW_TAG_module
:
21608 parent_type
= read_type_die (parent
, cu
);
21609 if (TYPE_NAME (parent_type
) != NULL
)
21610 return TYPE_NAME (parent_type
);
21612 /* An anonymous structure is only allowed non-static data
21613 members; no typedefs, no member functions, et cetera.
21614 So it does not need a prefix. */
21616 case DW_TAG_compile_unit
:
21617 case DW_TAG_partial_unit
:
21618 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
21619 if (cu
->language
== language_cplus
21620 && !dwarf2_per_objfile
->types
.empty ()
21621 && die
->child
!= NULL
21622 && (die
->tag
== DW_TAG_class_type
21623 || die
->tag
== DW_TAG_structure_type
21624 || die
->tag
== DW_TAG_union_type
))
21626 const char *name
= guess_full_die_structure_name (die
, cu
);
21631 case DW_TAG_subprogram
:
21632 /* Nested subroutines in Fortran get a prefix with the name
21633 of the parent's subroutine. */
21634 if (cu
->language
== language_fortran
)
21636 if ((die
->tag
== DW_TAG_subprogram
)
21637 && (dwarf2_name (parent
, cu
) != NULL
))
21638 return dwarf2_name (parent
, cu
);
21640 return determine_prefix (parent
, cu
);
21641 case DW_TAG_enumeration_type
:
21642 parent_type
= read_type_die (parent
, cu
);
21643 if (TYPE_DECLARED_CLASS (parent_type
))
21645 if (TYPE_NAME (parent_type
) != NULL
)
21646 return TYPE_NAME (parent_type
);
21649 /* Fall through. */
21651 return determine_prefix (parent
, cu
);
21655 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
21656 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
21657 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
21658 an obconcat, otherwise allocate storage for the result. The CU argument is
21659 used to determine the language and hence, the appropriate separator. */
21661 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
21664 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
21665 int physname
, struct dwarf2_cu
*cu
)
21667 const char *lead
= "";
21670 if (suffix
== NULL
|| suffix
[0] == '\0'
21671 || prefix
== NULL
|| prefix
[0] == '\0')
21673 else if (cu
->language
== language_d
)
21675 /* For D, the 'main' function could be defined in any module, but it
21676 should never be prefixed. */
21677 if (strcmp (suffix
, "D main") == 0)
21685 else if (cu
->language
== language_fortran
&& physname
)
21687 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
21688 DW_AT_MIPS_linkage_name is preferred and used instead. */
21696 if (prefix
== NULL
)
21698 if (suffix
== NULL
)
21705 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
21707 strcpy (retval
, lead
);
21708 strcat (retval
, prefix
);
21709 strcat (retval
, sep
);
21710 strcat (retval
, suffix
);
21715 /* We have an obstack. */
21716 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
21720 /* Get name of a die, return NULL if not found. */
21722 static const char *
21723 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
21724 struct objfile
*objfile
)
21726 if (name
&& cu
->language
== language_cplus
)
21728 std::string canon_name
= cp_canonicalize_string (name
);
21730 if (!canon_name
.empty ())
21732 if (canon_name
!= name
)
21733 name
= objfile
->intern (canon_name
);
21740 /* Get name of a die, return NULL if not found.
21741 Anonymous namespaces are converted to their magic string. */
21743 static const char *
21744 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21746 struct attribute
*attr
;
21747 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21749 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
21750 if ((!attr
|| !DW_STRING (attr
))
21751 && die
->tag
!= DW_TAG_namespace
21752 && die
->tag
!= DW_TAG_class_type
21753 && die
->tag
!= DW_TAG_interface_type
21754 && die
->tag
!= DW_TAG_structure_type
21755 && die
->tag
!= DW_TAG_union_type
)
21760 case DW_TAG_compile_unit
:
21761 case DW_TAG_partial_unit
:
21762 /* Compilation units have a DW_AT_name that is a filename, not
21763 a source language identifier. */
21764 case DW_TAG_enumeration_type
:
21765 case DW_TAG_enumerator
:
21766 /* These tags always have simple identifiers already; no need
21767 to canonicalize them. */
21768 return DW_STRING (attr
);
21770 case DW_TAG_namespace
:
21771 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
21772 return DW_STRING (attr
);
21773 return CP_ANONYMOUS_NAMESPACE_STR
;
21775 case DW_TAG_class_type
:
21776 case DW_TAG_interface_type
:
21777 case DW_TAG_structure_type
:
21778 case DW_TAG_union_type
:
21779 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
21780 structures or unions. These were of the form "._%d" in GCC 4.1,
21781 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
21782 and GCC 4.4. We work around this problem by ignoring these. */
21783 if (attr
&& DW_STRING (attr
)
21784 && (startswith (DW_STRING (attr
), "._")
21785 || startswith (DW_STRING (attr
), "<anonymous")))
21788 /* GCC might emit a nameless typedef that has a linkage name. See
21789 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21790 if (!attr
|| DW_STRING (attr
) == NULL
)
21792 attr
= dw2_linkage_name_attr (die
, cu
);
21793 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21796 /* Avoid demangling DW_STRING (attr) the second time on a second
21797 call for the same DIE. */
21798 if (!DW_STRING_IS_CANONICAL (attr
))
21800 gdb::unique_xmalloc_ptr
<char> demangled
21801 (gdb_demangle (DW_STRING (attr
), DMGL_TYPES
));
21802 if (demangled
== nullptr)
21805 DW_STRING (attr
) = objfile
->intern (demangled
.get ());
21806 DW_STRING_IS_CANONICAL (attr
) = 1;
21809 /* Strip any leading namespaces/classes, keep only the base name.
21810 DW_AT_name for named DIEs does not contain the prefixes. */
21811 const char *base
= strrchr (DW_STRING (attr
), ':');
21812 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
21815 return DW_STRING (attr
);
21823 if (!DW_STRING_IS_CANONICAL (attr
))
21825 DW_STRING (attr
) = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
21827 DW_STRING_IS_CANONICAL (attr
) = 1;
21829 return DW_STRING (attr
);
21832 /* Return the die that this die in an extension of, or NULL if there
21833 is none. *EXT_CU is the CU containing DIE on input, and the CU
21834 containing the return value on output. */
21836 static struct die_info
*
21837 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
21839 struct attribute
*attr
;
21841 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
21845 return follow_die_ref (die
, attr
, ext_cu
);
21849 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
21853 print_spaces (indent
, f
);
21854 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
21855 dwarf_tag_name (die
->tag
), die
->abbrev
,
21856 sect_offset_str (die
->sect_off
));
21858 if (die
->parent
!= NULL
)
21860 print_spaces (indent
, f
);
21861 fprintf_unfiltered (f
, " parent at offset: %s\n",
21862 sect_offset_str (die
->parent
->sect_off
));
21865 print_spaces (indent
, f
);
21866 fprintf_unfiltered (f
, " has children: %s\n",
21867 dwarf_bool_name (die
->child
!= NULL
));
21869 print_spaces (indent
, f
);
21870 fprintf_unfiltered (f
, " attributes:\n");
21872 for (i
= 0; i
< die
->num_attrs
; ++i
)
21874 print_spaces (indent
, f
);
21875 fprintf_unfiltered (f
, " %s (%s) ",
21876 dwarf_attr_name (die
->attrs
[i
].name
),
21877 dwarf_form_name (die
->attrs
[i
].form
));
21879 switch (die
->attrs
[i
].form
)
21882 case DW_FORM_addrx
:
21883 case DW_FORM_GNU_addr_index
:
21884 fprintf_unfiltered (f
, "address: ");
21885 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
21887 case DW_FORM_block2
:
21888 case DW_FORM_block4
:
21889 case DW_FORM_block
:
21890 case DW_FORM_block1
:
21891 fprintf_unfiltered (f
, "block: size %s",
21892 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21894 case DW_FORM_exprloc
:
21895 fprintf_unfiltered (f
, "expression: size %s",
21896 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21898 case DW_FORM_data16
:
21899 fprintf_unfiltered (f
, "constant of 16 bytes");
21901 case DW_FORM_ref_addr
:
21902 fprintf_unfiltered (f
, "ref address: ");
21903 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21905 case DW_FORM_GNU_ref_alt
:
21906 fprintf_unfiltered (f
, "alt ref address: ");
21907 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21913 case DW_FORM_ref_udata
:
21914 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
21915 (long) (DW_UNSND (&die
->attrs
[i
])));
21917 case DW_FORM_data1
:
21918 case DW_FORM_data2
:
21919 case DW_FORM_data4
:
21920 case DW_FORM_data8
:
21921 case DW_FORM_udata
:
21922 case DW_FORM_sdata
:
21923 fprintf_unfiltered (f
, "constant: %s",
21924 pulongest (DW_UNSND (&die
->attrs
[i
])));
21926 case DW_FORM_sec_offset
:
21927 fprintf_unfiltered (f
, "section offset: %s",
21928 pulongest (DW_UNSND (&die
->attrs
[i
])));
21930 case DW_FORM_ref_sig8
:
21931 fprintf_unfiltered (f
, "signature: %s",
21932 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
21934 case DW_FORM_string
:
21936 case DW_FORM_line_strp
:
21938 case DW_FORM_GNU_str_index
:
21939 case DW_FORM_GNU_strp_alt
:
21940 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
21941 DW_STRING (&die
->attrs
[i
])
21942 ? DW_STRING (&die
->attrs
[i
]) : "",
21943 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
21946 if (DW_UNSND (&die
->attrs
[i
]))
21947 fprintf_unfiltered (f
, "flag: TRUE");
21949 fprintf_unfiltered (f
, "flag: FALSE");
21951 case DW_FORM_flag_present
:
21952 fprintf_unfiltered (f
, "flag: TRUE");
21954 case DW_FORM_indirect
:
21955 /* The reader will have reduced the indirect form to
21956 the "base form" so this form should not occur. */
21957 fprintf_unfiltered (f
,
21958 "unexpected attribute form: DW_FORM_indirect");
21960 case DW_FORM_implicit_const
:
21961 fprintf_unfiltered (f
, "constant: %s",
21962 plongest (DW_SND (&die
->attrs
[i
])));
21965 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
21966 die
->attrs
[i
].form
);
21969 fprintf_unfiltered (f
, "\n");
21974 dump_die_for_error (struct die_info
*die
)
21976 dump_die_shallow (gdb_stderr
, 0, die
);
21980 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
21982 int indent
= level
* 4;
21984 gdb_assert (die
!= NULL
);
21986 if (level
>= max_level
)
21989 dump_die_shallow (f
, indent
, die
);
21991 if (die
->child
!= NULL
)
21993 print_spaces (indent
, f
);
21994 fprintf_unfiltered (f
, " Children:");
21995 if (level
+ 1 < max_level
)
21997 fprintf_unfiltered (f
, "\n");
21998 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22002 fprintf_unfiltered (f
,
22003 " [not printed, max nesting level reached]\n");
22007 if (die
->sibling
!= NULL
&& level
> 0)
22009 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22013 /* This is called from the pdie macro in gdbinit.in.
22014 It's not static so gcc will keep a copy callable from gdb. */
22017 dump_die (struct die_info
*die
, int max_level
)
22019 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22023 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22027 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22028 to_underlying (die
->sect_off
),
22034 /* Follow reference or signature attribute ATTR of SRC_DIE.
22035 On entry *REF_CU is the CU of SRC_DIE.
22036 On exit *REF_CU is the CU of the result. */
22038 static struct die_info
*
22039 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22040 struct dwarf2_cu
**ref_cu
)
22042 struct die_info
*die
;
22044 if (attr
->form_is_ref ())
22045 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22046 else if (attr
->form
== DW_FORM_ref_sig8
)
22047 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22050 dump_die_for_error (src_die
);
22051 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22052 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22058 /* Follow reference OFFSET.
22059 On entry *REF_CU is the CU of the source die referencing OFFSET.
22060 On exit *REF_CU is the CU of the result.
22061 Returns NULL if OFFSET is invalid. */
22063 static struct die_info
*
22064 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22065 struct dwarf2_cu
**ref_cu
)
22067 struct die_info temp_die
;
22068 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22069 struct dwarf2_per_objfile
*dwarf2_per_objfile
22070 = cu
->per_cu
->dwarf2_per_objfile
;
22072 gdb_assert (cu
->per_cu
!= NULL
);
22076 if (cu
->per_cu
->is_debug_types
)
22078 /* .debug_types CUs cannot reference anything outside their CU.
22079 If they need to, they have to reference a signatured type via
22080 DW_FORM_ref_sig8. */
22081 if (!cu
->header
.offset_in_cu_p (sect_off
))
22084 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22085 || !cu
->header
.offset_in_cu_p (sect_off
))
22087 struct dwarf2_per_cu_data
*per_cu
;
22089 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22090 dwarf2_per_objfile
);
22092 /* If necessary, add it to the queue and load its DIEs. */
22093 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22094 load_full_comp_unit (per_cu
, false, cu
->language
);
22096 target_cu
= per_cu
->cu
;
22098 else if (cu
->dies
== NULL
)
22100 /* We're loading full DIEs during partial symbol reading. */
22101 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22102 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
22105 *ref_cu
= target_cu
;
22106 temp_die
.sect_off
= sect_off
;
22108 if (target_cu
!= cu
)
22109 target_cu
->ancestor
= cu
;
22111 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22113 to_underlying (sect_off
));
22116 /* Follow reference attribute ATTR of SRC_DIE.
22117 On entry *REF_CU is the CU of SRC_DIE.
22118 On exit *REF_CU is the CU of the result. */
22120 static struct die_info
*
22121 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22122 struct dwarf2_cu
**ref_cu
)
22124 sect_offset sect_off
= attr
->get_ref_die_offset ();
22125 struct dwarf2_cu
*cu
= *ref_cu
;
22126 struct die_info
*die
;
22128 die
= follow_die_offset (sect_off
,
22129 (attr
->form
== DW_FORM_GNU_ref_alt
22130 || cu
->per_cu
->is_dwz
),
22133 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22134 "at %s [in module %s]"),
22135 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22136 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22143 struct dwarf2_locexpr_baton
22144 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22145 dwarf2_per_cu_data
*per_cu
,
22146 CORE_ADDR (*get_frame_pc
) (void *baton
),
22147 void *baton
, bool resolve_abstract_p
)
22149 struct dwarf2_cu
*cu
;
22150 struct die_info
*die
;
22151 struct attribute
*attr
;
22152 struct dwarf2_locexpr_baton retval
;
22153 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22154 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22156 if (per_cu
->cu
== NULL
)
22157 load_cu (per_cu
, false);
22161 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22162 Instead just throw an error, not much else we can do. */
22163 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22164 sect_offset_str (sect_off
), objfile_name (objfile
));
22167 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22169 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22170 sect_offset_str (sect_off
), objfile_name (objfile
));
22172 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22173 if (!attr
&& resolve_abstract_p
22174 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
22175 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
22177 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22178 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
22179 struct gdbarch
*gdbarch
= objfile
->arch ();
22181 for (const auto &cand_off
22182 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
22184 struct dwarf2_cu
*cand_cu
= cu
;
22185 struct die_info
*cand
22186 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
22189 || cand
->parent
->tag
!= DW_TAG_subprogram
)
22192 CORE_ADDR pc_low
, pc_high
;
22193 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
22194 if (pc_low
== ((CORE_ADDR
) -1))
22196 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
22197 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
22198 if (!(pc_low
<= pc
&& pc
< pc_high
))
22202 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22209 /* DWARF: "If there is no such attribute, then there is no effect.".
22210 DATA is ignored if SIZE is 0. */
22212 retval
.data
= NULL
;
22215 else if (attr
->form_is_section_offset ())
22217 struct dwarf2_loclist_baton loclist_baton
;
22218 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22221 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22223 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22225 retval
.size
= size
;
22229 if (!attr
->form_is_block ())
22230 error (_("Dwarf Error: DIE at %s referenced in module %s "
22231 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22232 sect_offset_str (sect_off
), objfile_name (objfile
));
22234 retval
.data
= DW_BLOCK (attr
)->data
;
22235 retval
.size
= DW_BLOCK (attr
)->size
;
22237 retval
.per_cu
= cu
->per_cu
;
22239 age_cached_comp_units (dwarf2_per_objfile
);
22246 struct dwarf2_locexpr_baton
22247 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22248 dwarf2_per_cu_data
*per_cu
,
22249 CORE_ADDR (*get_frame_pc
) (void *baton
),
22252 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22254 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22257 /* Write a constant of a given type as target-ordered bytes into
22260 static const gdb_byte
*
22261 write_constant_as_bytes (struct obstack
*obstack
,
22262 enum bfd_endian byte_order
,
22269 *len
= TYPE_LENGTH (type
);
22270 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22271 store_unsigned_integer (result
, *len
, byte_order
, value
);
22279 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22280 dwarf2_per_cu_data
*per_cu
,
22284 struct dwarf2_cu
*cu
;
22285 struct die_info
*die
;
22286 struct attribute
*attr
;
22287 const gdb_byte
*result
= NULL
;
22290 enum bfd_endian byte_order
;
22291 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22293 if (per_cu
->cu
== NULL
)
22294 load_cu (per_cu
, false);
22298 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22299 Instead just throw an error, not much else we can do. */
22300 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22301 sect_offset_str (sect_off
), objfile_name (objfile
));
22304 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22306 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22307 sect_offset_str (sect_off
), objfile_name (objfile
));
22309 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22313 byte_order
= (bfd_big_endian (objfile
->obfd
)
22314 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22316 switch (attr
->form
)
22319 case DW_FORM_addrx
:
22320 case DW_FORM_GNU_addr_index
:
22324 *len
= cu
->header
.addr_size
;
22325 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22326 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22330 case DW_FORM_string
:
22333 case DW_FORM_GNU_str_index
:
22334 case DW_FORM_GNU_strp_alt
:
22335 /* DW_STRING is already allocated on the objfile obstack, point
22337 result
= (const gdb_byte
*) DW_STRING (attr
);
22338 *len
= strlen (DW_STRING (attr
));
22340 case DW_FORM_block1
:
22341 case DW_FORM_block2
:
22342 case DW_FORM_block4
:
22343 case DW_FORM_block
:
22344 case DW_FORM_exprloc
:
22345 case DW_FORM_data16
:
22346 result
= DW_BLOCK (attr
)->data
;
22347 *len
= DW_BLOCK (attr
)->size
;
22350 /* The DW_AT_const_value attributes are supposed to carry the
22351 symbol's value "represented as it would be on the target
22352 architecture." By the time we get here, it's already been
22353 converted to host endianness, so we just need to sign- or
22354 zero-extend it as appropriate. */
22355 case DW_FORM_data1
:
22356 type
= die_type (die
, cu
);
22357 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
22358 if (result
== NULL
)
22359 result
= write_constant_as_bytes (obstack
, byte_order
,
22362 case DW_FORM_data2
:
22363 type
= die_type (die
, cu
);
22364 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
22365 if (result
== NULL
)
22366 result
= write_constant_as_bytes (obstack
, byte_order
,
22369 case DW_FORM_data4
:
22370 type
= die_type (die
, cu
);
22371 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
22372 if (result
== NULL
)
22373 result
= write_constant_as_bytes (obstack
, byte_order
,
22376 case DW_FORM_data8
:
22377 type
= die_type (die
, cu
);
22378 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
22379 if (result
== NULL
)
22380 result
= write_constant_as_bytes (obstack
, byte_order
,
22384 case DW_FORM_sdata
:
22385 case DW_FORM_implicit_const
:
22386 type
= die_type (die
, cu
);
22387 result
= write_constant_as_bytes (obstack
, byte_order
,
22388 type
, DW_SND (attr
), len
);
22391 case DW_FORM_udata
:
22392 type
= die_type (die
, cu
);
22393 result
= write_constant_as_bytes (obstack
, byte_order
,
22394 type
, DW_UNSND (attr
), len
);
22398 complaint (_("unsupported const value attribute form: '%s'"),
22399 dwarf_form_name (attr
->form
));
22409 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
22410 dwarf2_per_cu_data
*per_cu
)
22412 struct dwarf2_cu
*cu
;
22413 struct die_info
*die
;
22415 if (per_cu
->cu
== NULL
)
22416 load_cu (per_cu
, false);
22421 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22425 return die_type (die
, cu
);
22431 dwarf2_get_die_type (cu_offset die_offset
,
22432 struct dwarf2_per_cu_data
*per_cu
)
22434 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
22435 return get_die_type_at_offset (die_offset_sect
, per_cu
);
22438 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
22439 On entry *REF_CU is the CU of SRC_DIE.
22440 On exit *REF_CU is the CU of the result.
22441 Returns NULL if the referenced DIE isn't found. */
22443 static struct die_info
*
22444 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
22445 struct dwarf2_cu
**ref_cu
)
22447 struct die_info temp_die
;
22448 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
22449 struct die_info
*die
;
22451 /* While it might be nice to assert sig_type->type == NULL here,
22452 we can get here for DW_AT_imported_declaration where we need
22453 the DIE not the type. */
22455 /* If necessary, add it to the queue and load its DIEs. */
22457 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
22458 read_signatured_type (sig_type
);
22460 sig_cu
= sig_type
->per_cu
.cu
;
22461 gdb_assert (sig_cu
!= NULL
);
22462 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
22463 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
22464 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
22465 to_underlying (temp_die
.sect_off
));
22468 struct dwarf2_per_objfile
*dwarf2_per_objfile
22469 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
22471 /* For .gdb_index version 7 keep track of included TUs.
22472 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
22473 if (dwarf2_per_objfile
->index_table
!= NULL
22474 && dwarf2_per_objfile
->index_table
->version
<= 7)
22476 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
22481 sig_cu
->ancestor
= cu
;
22489 /* Follow signatured type referenced by ATTR in SRC_DIE.
22490 On entry *REF_CU is the CU of SRC_DIE.
22491 On exit *REF_CU is the CU of the result.
22492 The result is the DIE of the type.
22493 If the referenced type cannot be found an error is thrown. */
22495 static struct die_info
*
22496 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22497 struct dwarf2_cu
**ref_cu
)
22499 ULONGEST signature
= DW_SIGNATURE (attr
);
22500 struct signatured_type
*sig_type
;
22501 struct die_info
*die
;
22503 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
22505 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
22506 /* sig_type will be NULL if the signatured type is missing from
22508 if (sig_type
== NULL
)
22510 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22511 " from DIE at %s [in module %s]"),
22512 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22513 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22516 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
22519 dump_die_for_error (src_die
);
22520 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22521 " from DIE at %s [in module %s]"),
22522 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22523 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22529 /* Get the type specified by SIGNATURE referenced in DIE/CU,
22530 reading in and processing the type unit if necessary. */
22532 static struct type
*
22533 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
22534 struct dwarf2_cu
*cu
)
22536 struct dwarf2_per_objfile
*dwarf2_per_objfile
22537 = cu
->per_cu
->dwarf2_per_objfile
;
22538 struct signatured_type
*sig_type
;
22539 struct dwarf2_cu
*type_cu
;
22540 struct die_info
*type_die
;
22543 sig_type
= lookup_signatured_type (cu
, signature
);
22544 /* sig_type will be NULL if the signatured type is missing from
22546 if (sig_type
== NULL
)
22548 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22549 " from DIE at %s [in module %s]"),
22550 hex_string (signature
), sect_offset_str (die
->sect_off
),
22551 objfile_name (dwarf2_per_objfile
->objfile
));
22552 return build_error_marker_type (cu
, die
);
22555 /* If we already know the type we're done. */
22556 if (sig_type
->type
!= NULL
)
22557 return sig_type
->type
;
22560 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
22561 if (type_die
!= NULL
)
22563 /* N.B. We need to call get_die_type to ensure only one type for this DIE
22564 is created. This is important, for example, because for c++ classes
22565 we need TYPE_NAME set which is only done by new_symbol. Blech. */
22566 type
= read_type_die (type_die
, type_cu
);
22569 complaint (_("Dwarf Error: Cannot build signatured type %s"
22570 " referenced from DIE at %s [in module %s]"),
22571 hex_string (signature
), sect_offset_str (die
->sect_off
),
22572 objfile_name (dwarf2_per_objfile
->objfile
));
22573 type
= build_error_marker_type (cu
, die
);
22578 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22579 " from DIE at %s [in module %s]"),
22580 hex_string (signature
), sect_offset_str (die
->sect_off
),
22581 objfile_name (dwarf2_per_objfile
->objfile
));
22582 type
= build_error_marker_type (cu
, die
);
22584 sig_type
->type
= type
;
22589 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
22590 reading in and processing the type unit if necessary. */
22592 static struct type
*
22593 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
22594 struct dwarf2_cu
*cu
) /* ARI: editCase function */
22596 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
22597 if (attr
->form_is_ref ())
22599 struct dwarf2_cu
*type_cu
= cu
;
22600 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
22602 return read_type_die (type_die
, type_cu
);
22604 else if (attr
->form
== DW_FORM_ref_sig8
)
22606 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
22610 struct dwarf2_per_objfile
*dwarf2_per_objfile
22611 = cu
->per_cu
->dwarf2_per_objfile
;
22613 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
22614 " at %s [in module %s]"),
22615 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
22616 objfile_name (dwarf2_per_objfile
->objfile
));
22617 return build_error_marker_type (cu
, die
);
22621 /* Load the DIEs associated with type unit PER_CU into memory. */
22624 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
22626 struct signatured_type
*sig_type
;
22628 /* Caller is responsible for ensuring type_unit_groups don't get here. */
22629 gdb_assert (! per_cu
->type_unit_group_p ());
22631 /* We have the per_cu, but we need the signatured_type.
22632 Fortunately this is an easy translation. */
22633 gdb_assert (per_cu
->is_debug_types
);
22634 sig_type
= (struct signatured_type
*) per_cu
;
22636 gdb_assert (per_cu
->cu
== NULL
);
22638 read_signatured_type (sig_type
);
22640 gdb_assert (per_cu
->cu
!= NULL
);
22643 /* Read in a signatured type and build its CU and DIEs.
22644 If the type is a stub for the real type in a DWO file,
22645 read in the real type from the DWO file as well. */
22648 read_signatured_type (struct signatured_type
*sig_type
)
22650 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
22652 gdb_assert (per_cu
->is_debug_types
);
22653 gdb_assert (per_cu
->cu
== NULL
);
22655 cutu_reader
reader (per_cu
, NULL
, 0, false);
22657 if (!reader
.dummy_p
)
22659 struct dwarf2_cu
*cu
= reader
.cu
;
22660 const gdb_byte
*info_ptr
= reader
.info_ptr
;
22662 gdb_assert (cu
->die_hash
== NULL
);
22664 htab_create_alloc_ex (cu
->header
.length
/ 12,
22668 &cu
->comp_unit_obstack
,
22669 hashtab_obstack_allocate
,
22670 dummy_obstack_deallocate
);
22672 if (reader
.comp_unit_die
->has_children
)
22673 reader
.comp_unit_die
->child
22674 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
22675 reader
.comp_unit_die
);
22676 cu
->dies
= reader
.comp_unit_die
;
22677 /* comp_unit_die is not stored in die_hash, no need. */
22679 /* We try not to read any attributes in this function, because
22680 not all CUs needed for references have been loaded yet, and
22681 symbol table processing isn't initialized. But we have to
22682 set the CU language, or we won't be able to build types
22683 correctly. Similarly, if we do not read the producer, we can
22684 not apply producer-specific interpretation. */
22685 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
22690 sig_type
->per_cu
.tu_read
= 1;
22693 /* Decode simple location descriptions.
22694 Given a pointer to a dwarf block that defines a location, compute
22695 the location and return the value. If COMPUTED is non-null, it is
22696 set to true to indicate that decoding was successful, and false
22697 otherwise. If COMPUTED is null, then this function may emit a
22701 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
, bool *computed
)
22703 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22705 size_t size
= blk
->size
;
22706 const gdb_byte
*data
= blk
->data
;
22707 CORE_ADDR stack
[64];
22709 unsigned int bytes_read
, unsnd
;
22712 if (computed
!= nullptr)
22718 stack
[++stacki
] = 0;
22757 stack
[++stacki
] = op
- DW_OP_lit0
;
22792 stack
[++stacki
] = op
- DW_OP_reg0
;
22795 if (computed
== nullptr)
22796 dwarf2_complex_location_expr_complaint ();
22803 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
22805 stack
[++stacki
] = unsnd
;
22808 if (computed
== nullptr)
22809 dwarf2_complex_location_expr_complaint ();
22816 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
22821 case DW_OP_const1u
:
22822 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
22826 case DW_OP_const1s
:
22827 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
22831 case DW_OP_const2u
:
22832 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
22836 case DW_OP_const2s
:
22837 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
22841 case DW_OP_const4u
:
22842 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
22846 case DW_OP_const4s
:
22847 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
22851 case DW_OP_const8u
:
22852 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
22857 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
22863 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
22868 stack
[stacki
+ 1] = stack
[stacki
];
22873 stack
[stacki
- 1] += stack
[stacki
];
22877 case DW_OP_plus_uconst
:
22878 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
22884 stack
[stacki
- 1] -= stack
[stacki
];
22889 /* If we're not the last op, then we definitely can't encode
22890 this using GDB's address_class enum. This is valid for partial
22891 global symbols, although the variable's address will be bogus
22895 if (computed
== nullptr)
22896 dwarf2_complex_location_expr_complaint ();
22902 case DW_OP_GNU_push_tls_address
:
22903 case DW_OP_form_tls_address
:
22904 /* The top of the stack has the offset from the beginning
22905 of the thread control block at which the variable is located. */
22906 /* Nothing should follow this operator, so the top of stack would
22908 /* This is valid for partial global symbols, but the variable's
22909 address will be bogus in the psymtab. Make it always at least
22910 non-zero to not look as a variable garbage collected by linker
22911 which have DW_OP_addr 0. */
22914 if (computed
== nullptr)
22915 dwarf2_complex_location_expr_complaint ();
22922 case DW_OP_GNU_uninit
:
22923 if (computed
!= nullptr)
22928 case DW_OP_GNU_addr_index
:
22929 case DW_OP_GNU_const_index
:
22930 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
22936 if (computed
== nullptr)
22938 const char *name
= get_DW_OP_name (op
);
22941 complaint (_("unsupported stack op: '%s'"),
22944 complaint (_("unsupported stack op: '%02x'"),
22948 return (stack
[stacki
]);
22951 /* Enforce maximum stack depth of SIZE-1 to avoid writing
22952 outside of the allocated space. Also enforce minimum>0. */
22953 if (stacki
>= ARRAY_SIZE (stack
) - 1)
22955 if (computed
== nullptr)
22956 complaint (_("location description stack overflow"));
22962 if (computed
== nullptr)
22963 complaint (_("location description stack underflow"));
22968 if (computed
!= nullptr)
22970 return (stack
[stacki
]);
22973 /* memory allocation interface */
22975 static struct dwarf_block
*
22976 dwarf_alloc_block (struct dwarf2_cu
*cu
)
22978 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
22981 static struct die_info
*
22982 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
22984 struct die_info
*die
;
22985 size_t size
= sizeof (struct die_info
);
22988 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
22990 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
22991 memset (die
, 0, sizeof (struct die_info
));
22997 /* Macro support. */
22999 /* An overload of dwarf_decode_macros that finds the correct section
23000 and ensures it is read in before calling the other overload. */
23003 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
23004 int section_is_gnu
)
23006 struct dwarf2_per_objfile
*dwarf2_per_objfile
23007 = cu
->per_cu
->dwarf2_per_objfile
;
23008 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23009 const struct line_header
*lh
= cu
->line_header
;
23010 unsigned int offset_size
= cu
->header
.offset_size
;
23011 struct dwarf2_section_info
*section
;
23012 const char *section_name
;
23014 if (cu
->dwo_unit
!= nullptr)
23016 if (section_is_gnu
)
23018 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
23019 section_name
= ".debug_macro.dwo";
23023 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
23024 section_name
= ".debug_macinfo.dwo";
23029 if (section_is_gnu
)
23031 section
= &dwarf2_per_objfile
->macro
;
23032 section_name
= ".debug_macro";
23036 section
= &dwarf2_per_objfile
->macinfo
;
23037 section_name
= ".debug_macinfo";
23041 section
->read (objfile
);
23042 if (section
->buffer
== nullptr)
23044 complaint (_("missing %s section"), section_name
);
23048 buildsym_compunit
*builder
= cu
->get_builder ();
23050 dwarf_decode_macros (dwarf2_per_objfile
, builder
, section
, lh
,
23051 offset_size
, offset
, section_is_gnu
);
23054 /* Return the .debug_loc section to use for CU.
23055 For DWO files use .debug_loc.dwo. */
23057 static struct dwarf2_section_info
*
23058 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23060 struct dwarf2_per_objfile
*dwarf2_per_objfile
23061 = cu
->per_cu
->dwarf2_per_objfile
;
23065 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23067 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23069 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
23070 : &dwarf2_per_objfile
->loc
);
23073 /* A helper function that fills in a dwarf2_loclist_baton. */
23076 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23077 struct dwarf2_loclist_baton
*baton
,
23078 const struct attribute
*attr
)
23080 struct dwarf2_per_objfile
*dwarf2_per_objfile
23081 = cu
->per_cu
->dwarf2_per_objfile
;
23082 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23084 section
->read (dwarf2_per_objfile
->objfile
);
23086 baton
->per_cu
= cu
->per_cu
;
23087 gdb_assert (baton
->per_cu
);
23088 /* We don't know how long the location list is, but make sure we
23089 don't run off the edge of the section. */
23090 baton
->size
= section
->size
- DW_UNSND (attr
);
23091 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23092 if (cu
->base_address
.has_value ())
23093 baton
->base_address
= *cu
->base_address
;
23095 baton
->base_address
= 0;
23096 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23100 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
23101 struct dwarf2_cu
*cu
, int is_block
)
23103 struct dwarf2_per_objfile
*dwarf2_per_objfile
23104 = cu
->per_cu
->dwarf2_per_objfile
;
23105 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23106 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23108 if (attr
->form_is_section_offset ()
23109 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
23110 the section. If so, fall through to the complaint in the
23112 && DW_UNSND (attr
) < section
->get_size (objfile
))
23114 struct dwarf2_loclist_baton
*baton
;
23116 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
23118 fill_in_loclist_baton (cu
, baton
, attr
);
23120 if (!cu
->base_address
.has_value ())
23121 complaint (_("Location list used without "
23122 "specifying the CU base address."));
23124 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23125 ? dwarf2_loclist_block_index
23126 : dwarf2_loclist_index
);
23127 SYMBOL_LOCATION_BATON (sym
) = baton
;
23131 struct dwarf2_locexpr_baton
*baton
;
23133 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
23134 baton
->per_cu
= cu
->per_cu
;
23135 gdb_assert (baton
->per_cu
);
23137 if (attr
->form_is_block ())
23139 /* Note that we're just copying the block's data pointer
23140 here, not the actual data. We're still pointing into the
23141 info_buffer for SYM's objfile; right now we never release
23142 that buffer, but when we do clean up properly this may
23144 baton
->size
= DW_BLOCK (attr
)->size
;
23145 baton
->data
= DW_BLOCK (attr
)->data
;
23149 dwarf2_invalid_attrib_class_complaint ("location description",
23150 sym
->natural_name ());
23154 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23155 ? dwarf2_locexpr_block_index
23156 : dwarf2_locexpr_index
);
23157 SYMBOL_LOCATION_BATON (sym
) = baton
;
23164 dwarf2_per_cu_data::objfile () const
23166 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23168 /* Return the master objfile, so that we can report and look up the
23169 correct file containing this variable. */
23170 if (objfile
->separate_debug_objfile_backlink
)
23171 objfile
= objfile
->separate_debug_objfile_backlink
;
23176 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
23177 (CU_HEADERP is unused in such case) or prepare a temporary copy at
23178 CU_HEADERP first. */
23180 static const struct comp_unit_head
*
23181 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
23182 const struct dwarf2_per_cu_data
*per_cu
)
23184 const gdb_byte
*info_ptr
;
23187 return &per_cu
->cu
->header
;
23189 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
23191 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
23192 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
23193 rcuh_kind::COMPILE
);
23201 dwarf2_per_cu_data::addr_size () const
23203 struct comp_unit_head cu_header_local
;
23204 const struct comp_unit_head
*cu_headerp
;
23206 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23208 return cu_headerp
->addr_size
;
23214 dwarf2_per_cu_data::offset_size () const
23216 struct comp_unit_head cu_header_local
;
23217 const struct comp_unit_head
*cu_headerp
;
23219 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23221 return cu_headerp
->offset_size
;
23227 dwarf2_per_cu_data::ref_addr_size () const
23229 struct comp_unit_head cu_header_local
;
23230 const struct comp_unit_head
*cu_headerp
;
23232 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23234 if (cu_headerp
->version
== 2)
23235 return cu_headerp
->addr_size
;
23237 return cu_headerp
->offset_size
;
23243 dwarf2_per_cu_data::text_offset () const
23245 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23247 return objfile
->text_section_offset ();
23253 dwarf2_per_cu_data::addr_type () const
23255 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23256 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
23257 struct type
*addr_type
= lookup_pointer_type (void_type
);
23258 int addr_size
= this->addr_size ();
23260 if (TYPE_LENGTH (addr_type
) == addr_size
)
23263 addr_type
= addr_sized_int_type (TYPE_UNSIGNED (addr_type
));
23267 /* A helper function for dwarf2_find_containing_comp_unit that returns
23268 the index of the result, and that searches a vector. It will
23269 return a result even if the offset in question does not actually
23270 occur in any CU. This is separate so that it can be unit
23274 dwarf2_find_containing_comp_unit
23275 (sect_offset sect_off
,
23276 unsigned int offset_in_dwz
,
23277 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
23282 high
= all_comp_units
.size () - 1;
23285 struct dwarf2_per_cu_data
*mid_cu
;
23286 int mid
= low
+ (high
- low
) / 2;
23288 mid_cu
= all_comp_units
[mid
];
23289 if (mid_cu
->is_dwz
> offset_in_dwz
23290 || (mid_cu
->is_dwz
== offset_in_dwz
23291 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
23296 gdb_assert (low
== high
);
23300 /* Locate the .debug_info compilation unit from CU's objfile which contains
23301 the DIE at OFFSET. Raises an error on failure. */
23303 static struct dwarf2_per_cu_data
*
23304 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23305 unsigned int offset_in_dwz
,
23306 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23309 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23310 dwarf2_per_objfile
->all_comp_units
);
23311 struct dwarf2_per_cu_data
*this_cu
23312 = dwarf2_per_objfile
->all_comp_units
[low
];
23314 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
23316 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23317 error (_("Dwarf Error: could not find partial DIE containing "
23318 "offset %s [in module %s]"),
23319 sect_offset_str (sect_off
),
23320 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
23322 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
23324 return dwarf2_per_objfile
->all_comp_units
[low
-1];
23328 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
23329 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23330 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
23331 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23338 namespace selftests
{
23339 namespace find_containing_comp_unit
{
23344 struct dwarf2_per_cu_data one
{};
23345 struct dwarf2_per_cu_data two
{};
23346 struct dwarf2_per_cu_data three
{};
23347 struct dwarf2_per_cu_data four
{};
23350 two
.sect_off
= sect_offset (one
.length
);
23355 four
.sect_off
= sect_offset (three
.length
);
23359 std::vector
<dwarf2_per_cu_data
*> units
;
23360 units
.push_back (&one
);
23361 units
.push_back (&two
);
23362 units
.push_back (&three
);
23363 units
.push_back (&four
);
23367 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
23368 SELF_CHECK (units
[result
] == &one
);
23369 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
23370 SELF_CHECK (units
[result
] == &one
);
23371 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
23372 SELF_CHECK (units
[result
] == &two
);
23374 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
23375 SELF_CHECK (units
[result
] == &three
);
23376 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
23377 SELF_CHECK (units
[result
] == &three
);
23378 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
23379 SELF_CHECK (units
[result
] == &four
);
23385 #endif /* GDB_SELF_TEST */
23387 /* Initialize dwarf2_cu CU, owned by PER_CU. */
23389 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
23390 : per_cu (per_cu_
),
23392 has_loclist (false),
23393 checked_producer (false),
23394 producer_is_gxx_lt_4_6 (false),
23395 producer_is_gcc_lt_4_3 (false),
23396 producer_is_icc (false),
23397 producer_is_icc_lt_14 (false),
23398 producer_is_codewarrior (false),
23399 processing_has_namespace_info (false)
23404 /* Destroy a dwarf2_cu. */
23406 dwarf2_cu::~dwarf2_cu ()
23411 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23414 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23415 enum language pretend_language
)
23417 struct attribute
*attr
;
23419 /* Set the language we're debugging. */
23420 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23421 if (attr
!= nullptr)
23422 set_cu_language (DW_UNSND (attr
), cu
);
23425 cu
->language
= pretend_language
;
23426 cu
->language_defn
= language_def (cu
->language
);
23429 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23432 /* Increase the age counter on each cached compilation unit, and free
23433 any that are too old. */
23436 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23438 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23440 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
23441 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23442 while (per_cu
!= NULL
)
23444 per_cu
->cu
->last_used
++;
23445 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23446 dwarf2_mark (per_cu
->cu
);
23447 per_cu
= per_cu
->cu
->read_in_chain
;
23450 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23451 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23452 while (per_cu
!= NULL
)
23454 struct dwarf2_per_cu_data
*next_cu
;
23456 next_cu
= per_cu
->cu
->read_in_chain
;
23458 if (!per_cu
->cu
->mark
)
23461 *last_chain
= next_cu
;
23464 last_chain
= &per_cu
->cu
->read_in_chain
;
23470 /* Remove a single compilation unit from the cache. */
23473 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
23475 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23476 struct dwarf2_per_objfile
*dwarf2_per_objfile
23477 = target_per_cu
->dwarf2_per_objfile
;
23479 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23480 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23481 while (per_cu
!= NULL
)
23483 struct dwarf2_per_cu_data
*next_cu
;
23485 next_cu
= per_cu
->cu
->read_in_chain
;
23487 if (per_cu
== target_per_cu
)
23491 *last_chain
= next_cu
;
23495 last_chain
= &per_cu
->cu
->read_in_chain
;
23501 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23502 We store these in a hash table separate from the DIEs, and preserve them
23503 when the DIEs are flushed out of cache.
23505 The CU "per_cu" pointer is needed because offset alone is not enough to
23506 uniquely identify the type. A file may have multiple .debug_types sections,
23507 or the type may come from a DWO file. Furthermore, while it's more logical
23508 to use per_cu->section+offset, with Fission the section with the data is in
23509 the DWO file but we don't know that section at the point we need it.
23510 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23511 because we can enter the lookup routine, get_die_type_at_offset, from
23512 outside this file, and thus won't necessarily have PER_CU->cu.
23513 Fortunately, PER_CU is stable for the life of the objfile. */
23515 struct dwarf2_per_cu_offset_and_type
23517 const struct dwarf2_per_cu_data
*per_cu
;
23518 sect_offset sect_off
;
23522 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23525 per_cu_offset_and_type_hash (const void *item
)
23527 const struct dwarf2_per_cu_offset_and_type
*ofs
23528 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23530 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23533 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23536 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23538 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23539 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23540 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23541 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23543 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23544 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23547 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23548 table if necessary. For convenience, return TYPE.
23550 The DIEs reading must have careful ordering to:
23551 * Not cause infinite loops trying to read in DIEs as a prerequisite for
23552 reading current DIE.
23553 * Not trying to dereference contents of still incompletely read in types
23554 while reading in other DIEs.
23555 * Enable referencing still incompletely read in types just by a pointer to
23556 the type without accessing its fields.
23558 Therefore caller should follow these rules:
23559 * Try to fetch any prerequisite types we may need to build this DIE type
23560 before building the type and calling set_die_type.
23561 * After building type call set_die_type for current DIE as soon as
23562 possible before fetching more types to complete the current type.
23563 * Make the type as complete as possible before fetching more types. */
23565 static struct type
*
23566 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23568 struct dwarf2_per_objfile
*dwarf2_per_objfile
23569 = cu
->per_cu
->dwarf2_per_objfile
;
23570 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23571 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23572 struct attribute
*attr
;
23573 struct dynamic_prop prop
;
23575 /* For Ada types, make sure that the gnat-specific data is always
23576 initialized (if not already set). There are a few types where
23577 we should not be doing so, because the type-specific area is
23578 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23579 where the type-specific area is used to store the floatformat).
23580 But this is not a problem, because the gnat-specific information
23581 is actually not needed for these types. */
23582 if (need_gnat_info (cu
)
23583 && TYPE_CODE (type
) != TYPE_CODE_FUNC
23584 && TYPE_CODE (type
) != TYPE_CODE_FLT
23585 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
23586 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
23587 && TYPE_CODE (type
) != TYPE_CODE_METHOD
23588 && !HAVE_GNAT_AUX_INFO (type
))
23589 INIT_GNAT_SPECIFIC (type
);
23591 /* Read DW_AT_allocated and set in type. */
23592 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23593 if (attr
!= NULL
&& attr
->form_is_block ())
23595 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23596 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23597 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
23599 else if (attr
!= NULL
)
23601 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
23602 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23603 sect_offset_str (die
->sect_off
));
23606 /* Read DW_AT_associated and set in type. */
23607 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23608 if (attr
!= NULL
&& attr
->form_is_block ())
23610 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23611 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23612 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
23614 else if (attr
!= NULL
)
23616 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
23617 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23618 sect_offset_str (die
->sect_off
));
23621 /* Read DW_AT_data_location and set in type. */
23622 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23623 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
23624 cu
->per_cu
->addr_type ()))
23625 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
23627 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23628 dwarf2_per_objfile
->die_type_hash
23629 = htab_up (htab_create_alloc (127,
23630 per_cu_offset_and_type_hash
,
23631 per_cu_offset_and_type_eq
,
23632 NULL
, xcalloc
, xfree
));
23634 ofs
.per_cu
= cu
->per_cu
;
23635 ofs
.sect_off
= die
->sect_off
;
23637 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23638 htab_find_slot (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
, INSERT
);
23640 complaint (_("A problem internal to GDB: DIE %s has type already set"),
23641 sect_offset_str (die
->sect_off
));
23642 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23643 struct dwarf2_per_cu_offset_and_type
);
23648 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23649 or return NULL if the die does not have a saved type. */
23651 static struct type
*
23652 get_die_type_at_offset (sect_offset sect_off
,
23653 struct dwarf2_per_cu_data
*per_cu
)
23655 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23656 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23658 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23661 ofs
.per_cu
= per_cu
;
23662 ofs
.sect_off
= sect_off
;
23663 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23664 htab_find (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
));
23671 /* Look up the type for DIE in CU in die_type_hash,
23672 or return NULL if DIE does not have a saved type. */
23674 static struct type
*
23675 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23677 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
23680 /* Add a dependence relationship from CU to REF_PER_CU. */
23683 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23684 struct dwarf2_per_cu_data
*ref_per_cu
)
23688 if (cu
->dependencies
== NULL
)
23690 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23691 NULL
, &cu
->comp_unit_obstack
,
23692 hashtab_obstack_allocate
,
23693 dummy_obstack_deallocate
);
23695 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23697 *slot
= ref_per_cu
;
23700 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23701 Set the mark field in every compilation unit in the
23702 cache that we must keep because we are keeping CU. */
23705 dwarf2_mark_helper (void **slot
, void *data
)
23707 struct dwarf2_per_cu_data
*per_cu
;
23709 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23711 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23712 reading of the chain. As such dependencies remain valid it is not much
23713 useful to track and undo them during QUIT cleanups. */
23714 if (per_cu
->cu
== NULL
)
23717 if (per_cu
->cu
->mark
)
23719 per_cu
->cu
->mark
= true;
23721 if (per_cu
->cu
->dependencies
!= NULL
)
23722 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23727 /* Set the mark field in CU and in every other compilation unit in the
23728 cache that we must keep because we are keeping CU. */
23731 dwarf2_mark (struct dwarf2_cu
*cu
)
23736 if (cu
->dependencies
!= NULL
)
23737 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23741 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23745 per_cu
->cu
->mark
= false;
23746 per_cu
= per_cu
->cu
->read_in_chain
;
23750 /* Trivial hash function for partial_die_info: the hash value of a DIE
23751 is its offset in .debug_info for this objfile. */
23754 partial_die_hash (const void *item
)
23756 const struct partial_die_info
*part_die
23757 = (const struct partial_die_info
*) item
;
23759 return to_underlying (part_die
->sect_off
);
23762 /* Trivial comparison function for partial_die_info structures: two DIEs
23763 are equal if they have the same offset. */
23766 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23768 const struct partial_die_info
*part_die_lhs
23769 = (const struct partial_die_info
*) item_lhs
;
23770 const struct partial_die_info
*part_die_rhs
23771 = (const struct partial_die_info
*) item_rhs
;
23773 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23776 struct cmd_list_element
*set_dwarf_cmdlist
;
23777 struct cmd_list_element
*show_dwarf_cmdlist
;
23780 show_check_physname (struct ui_file
*file
, int from_tty
,
23781 struct cmd_list_element
*c
, const char *value
)
23783 fprintf_filtered (file
,
23784 _("Whether to check \"physname\" is %s.\n"),
23788 void _initialize_dwarf2_read ();
23790 _initialize_dwarf2_read ()
23792 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
23793 Set DWARF specific variables.\n\
23794 Configure DWARF variables such as the cache size."),
23795 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23796 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23798 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
23799 Show DWARF specific variables.\n\
23800 Show DWARF variables such as the cache size."),
23801 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23802 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23804 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23805 &dwarf_max_cache_age
, _("\
23806 Set the upper bound on the age of cached DWARF compilation units."), _("\
23807 Show the upper bound on the age of cached DWARF compilation units."), _("\
23808 A higher limit means that cached compilation units will be stored\n\
23809 in memory longer, and more total memory will be used. Zero disables\n\
23810 caching, which can slow down startup."),
23812 show_dwarf_max_cache_age
,
23813 &set_dwarf_cmdlist
,
23814 &show_dwarf_cmdlist
);
23816 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23817 Set debugging of the DWARF reader."), _("\
23818 Show debugging of the DWARF reader."), _("\
23819 When enabled (non-zero), debugging messages are printed during DWARF\n\
23820 reading and symtab expansion. A value of 1 (one) provides basic\n\
23821 information. A value greater than 1 provides more verbose information."),
23824 &setdebuglist
, &showdebuglist
);
23826 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23827 Set debugging of the DWARF DIE reader."), _("\
23828 Show debugging of the DWARF DIE reader."), _("\
23829 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23830 The value is the maximum depth to print."),
23833 &setdebuglist
, &showdebuglist
);
23835 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23836 Set debugging of the dwarf line reader."), _("\
23837 Show debugging of the dwarf line reader."), _("\
23838 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23839 A value of 1 (one) provides basic information.\n\
23840 A value greater than 1 provides more verbose information."),
23843 &setdebuglist
, &showdebuglist
);
23845 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23846 Set cross-checking of \"physname\" code against demangler."), _("\
23847 Show cross-checking of \"physname\" code against demangler."), _("\
23848 When enabled, GDB's internal \"physname\" code is checked against\n\
23850 NULL
, show_check_physname
,
23851 &setdebuglist
, &showdebuglist
);
23853 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23854 no_class
, &use_deprecated_index_sections
, _("\
23855 Set whether to use deprecated gdb_index sections."), _("\
23856 Show whether to use deprecated gdb_index sections."), _("\
23857 When enabled, deprecated .gdb_index sections are used anyway.\n\
23858 Normally they are ignored either because of a missing feature or\n\
23859 performance issue.\n\
23860 Warning: This option must be enabled before gdb reads the file."),
23863 &setlist
, &showlist
);
23865 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23866 &dwarf2_locexpr_funcs
);
23867 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23868 &dwarf2_loclist_funcs
);
23870 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23871 &dwarf2_block_frame_base_locexpr_funcs
);
23872 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23873 &dwarf2_block_frame_base_loclist_funcs
);
23876 selftests::register_test ("dw2_expand_symtabs_matching",
23877 selftests::dw2_expand_symtabs_matching::run_test
);
23878 selftests::register_test ("dwarf2_find_containing_comp_unit",
23879 selftests::find_containing_comp_unit::run_test
);