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
*);
1440 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1441 struct dwarf2_cu
*);
1443 static struct die_info
*read_die_and_siblings_1
1444 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1447 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1448 const gdb_byte
*info_ptr
,
1449 const gdb_byte
**new_info_ptr
,
1450 struct die_info
*parent
);
1452 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1453 struct die_info
**, const gdb_byte
*,
1456 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1457 struct die_info
**, const gdb_byte
*);
1459 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1461 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1464 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1466 static const char *dwarf2_full_name (const char *name
,
1467 struct die_info
*die
,
1468 struct dwarf2_cu
*cu
);
1470 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1471 struct dwarf2_cu
*cu
);
1473 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1474 struct dwarf2_cu
**);
1476 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1478 static void dump_die_for_error (struct die_info
*);
1480 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1483 /*static*/ void dump_die (struct die_info
*, int max_level
);
1485 static void store_in_ref_table (struct die_info
*,
1486 struct dwarf2_cu
*);
1488 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1489 const struct attribute
*,
1490 struct dwarf2_cu
**);
1492 static struct die_info
*follow_die_ref (struct die_info
*,
1493 const struct attribute
*,
1494 struct dwarf2_cu
**);
1496 static struct die_info
*follow_die_sig (struct die_info
*,
1497 const struct attribute
*,
1498 struct dwarf2_cu
**);
1500 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1501 struct dwarf2_cu
*);
1503 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1504 const struct attribute
*,
1505 struct dwarf2_cu
*);
1507 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1509 static void read_signatured_type (struct signatured_type
*);
1511 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1512 struct die_info
*die
, struct dwarf2_cu
*cu
,
1513 struct dynamic_prop
*prop
, struct type
*type
);
1515 /* memory allocation interface */
1517 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1519 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1521 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1523 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1524 struct dwarf2_loclist_baton
*baton
,
1525 const struct attribute
*attr
);
1527 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1529 struct dwarf2_cu
*cu
,
1532 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1533 const gdb_byte
*info_ptr
,
1534 struct abbrev_info
*abbrev
);
1536 static hashval_t
partial_die_hash (const void *item
);
1538 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1540 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1541 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1542 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1544 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1545 struct die_info
*comp_unit_die
,
1546 enum language pretend_language
);
1548 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1550 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1552 static struct type
*set_die_type (struct die_info
*, struct type
*,
1553 struct dwarf2_cu
*);
1555 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1557 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1559 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1562 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1565 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1568 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1569 struct dwarf2_per_cu_data
*);
1571 static void dwarf2_mark (struct dwarf2_cu
*);
1573 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1575 static struct type
*get_die_type_at_offset (sect_offset
,
1576 struct dwarf2_per_cu_data
*);
1578 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1580 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1581 enum language pretend_language
);
1583 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1585 /* Class, the destructor of which frees all allocated queue entries. This
1586 will only have work to do if an error was thrown while processing the
1587 dwarf. If no error was thrown then the queue entries should have all
1588 been processed, and freed, as we went along. */
1590 class dwarf2_queue_guard
1593 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1594 : m_per_objfile (per_objfile
)
1598 /* Free any entries remaining on the queue. There should only be
1599 entries left if we hit an error while processing the dwarf. */
1600 ~dwarf2_queue_guard ()
1602 /* Ensure that no memory is allocated by the queue. */
1603 std::queue
<dwarf2_queue_item
> empty
;
1604 std::swap (m_per_objfile
->queue
, empty
);
1607 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1610 dwarf2_per_objfile
*m_per_objfile
;
1613 dwarf2_queue_item::~dwarf2_queue_item ()
1615 /* Anything still marked queued is likely to be in an
1616 inconsistent state, so discard it. */
1619 if (per_cu
->cu
!= NULL
)
1620 free_one_cached_comp_unit (per_cu
);
1625 /* The return type of find_file_and_directory. Note, the enclosed
1626 string pointers are only valid while this object is valid. */
1628 struct file_and_directory
1630 /* The filename. This is never NULL. */
1633 /* The compilation directory. NULL if not known. If we needed to
1634 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1635 points directly to the DW_AT_comp_dir string attribute owned by
1636 the obstack that owns the DIE. */
1637 const char *comp_dir
;
1639 /* If we needed to build a new string for comp_dir, this is what
1640 owns the storage. */
1641 std::string comp_dir_storage
;
1644 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1645 struct dwarf2_cu
*cu
);
1647 static htab_up
allocate_signatured_type_table ();
1649 static htab_up
allocate_dwo_unit_table ();
1651 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1652 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1653 struct dwp_file
*dwp_file
, const char *comp_dir
,
1654 ULONGEST signature
, int is_debug_types
);
1656 static struct dwp_file
*get_dwp_file
1657 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1659 static struct dwo_unit
*lookup_dwo_comp_unit
1660 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1662 static struct dwo_unit
*lookup_dwo_type_unit
1663 (struct signatured_type
*, const char *, const char *);
1665 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1667 /* A unique pointer to a dwo_file. */
1669 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1671 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1673 static void check_producer (struct dwarf2_cu
*cu
);
1675 static void free_line_header_voidp (void *arg
);
1677 /* Various complaints about symbol reading that don't abort the process. */
1680 dwarf2_debug_line_missing_file_complaint (void)
1682 complaint (_(".debug_line section has line data without a file"));
1686 dwarf2_debug_line_missing_end_sequence_complaint (void)
1688 complaint (_(".debug_line section has line "
1689 "program sequence without an end"));
1693 dwarf2_complex_location_expr_complaint (void)
1695 complaint (_("location expression too complex"));
1699 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1702 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1707 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1709 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1713 /* Hash function for line_header_hash. */
1716 line_header_hash (const struct line_header
*ofs
)
1718 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1721 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1724 line_header_hash_voidp (const void *item
)
1726 const struct line_header
*ofs
= (const struct line_header
*) item
;
1728 return line_header_hash (ofs
);
1731 /* Equality function for line_header_hash. */
1734 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1736 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1737 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1739 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1740 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1745 /* See declaration. */
1747 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
1748 const dwarf2_debug_sections
*names
,
1750 : objfile (objfile_
),
1751 can_copy (can_copy_
)
1754 names
= &dwarf2_elf_names
;
1756 bfd
*obfd
= objfile
->obfd
;
1758 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1759 locate_sections (obfd
, sec
, *names
);
1762 dwarf2_per_objfile::~dwarf2_per_objfile ()
1764 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
1765 free_cached_comp_units ();
1767 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
1768 per_cu
->imported_symtabs_free ();
1770 for (signatured_type
*sig_type
: all_type_units
)
1771 sig_type
->per_cu
.imported_symtabs_free ();
1773 /* Everything else should be on the objfile obstack. */
1776 /* See declaration. */
1779 dwarf2_per_objfile::free_cached_comp_units ()
1781 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
1782 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
1783 while (per_cu
!= NULL
)
1785 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
1788 *last_chain
= next_cu
;
1793 /* A helper class that calls free_cached_comp_units on
1796 class free_cached_comp_units
1800 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
1801 : m_per_objfile (per_objfile
)
1805 ~free_cached_comp_units ()
1807 m_per_objfile
->free_cached_comp_units ();
1810 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
1814 dwarf2_per_objfile
*m_per_objfile
;
1817 /* Try to locate the sections we need for DWARF 2 debugging
1818 information and return true if we have enough to do something.
1819 NAMES points to the dwarf2 section names, or is NULL if the standard
1820 ELF names are used. CAN_COPY is true for formats where symbol
1821 interposition is possible and so symbol values must follow copy
1822 relocation rules. */
1825 dwarf2_has_info (struct objfile
*objfile
,
1826 const struct dwarf2_debug_sections
*names
,
1829 if (objfile
->flags
& OBJF_READNEVER
)
1832 struct dwarf2_per_objfile
*dwarf2_per_objfile
1833 = get_dwarf2_per_objfile (objfile
);
1835 if (dwarf2_per_objfile
== NULL
)
1836 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
1840 return (!dwarf2_per_objfile
->info
.is_virtual
1841 && dwarf2_per_objfile
->info
.s
.section
!= NULL
1842 && !dwarf2_per_objfile
->abbrev
.is_virtual
1843 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
1846 /* When loading sections, we look either for uncompressed section or for
1847 compressed section names. */
1850 section_is_p (const char *section_name
,
1851 const struct dwarf2_section_names
*names
)
1853 if (names
->normal
!= NULL
1854 && strcmp (section_name
, names
->normal
) == 0)
1856 if (names
->compressed
!= NULL
1857 && strcmp (section_name
, names
->compressed
) == 0)
1862 /* See declaration. */
1865 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
1866 const dwarf2_debug_sections
&names
)
1868 flagword aflag
= bfd_section_flags (sectp
);
1870 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1873 else if (elf_section_data (sectp
)->this_hdr
.sh_size
1874 > bfd_get_file_size (abfd
))
1876 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
1877 warning (_("Discarding section %s which has a section size (%s"
1878 ") larger than the file size [in module %s]"),
1879 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
1880 bfd_get_filename (abfd
));
1882 else if (section_is_p (sectp
->name
, &names
.info
))
1884 this->info
.s
.section
= sectp
;
1885 this->info
.size
= bfd_section_size (sectp
);
1887 else if (section_is_p (sectp
->name
, &names
.abbrev
))
1889 this->abbrev
.s
.section
= sectp
;
1890 this->abbrev
.size
= bfd_section_size (sectp
);
1892 else if (section_is_p (sectp
->name
, &names
.line
))
1894 this->line
.s
.section
= sectp
;
1895 this->line
.size
= bfd_section_size (sectp
);
1897 else if (section_is_p (sectp
->name
, &names
.loc
))
1899 this->loc
.s
.section
= sectp
;
1900 this->loc
.size
= bfd_section_size (sectp
);
1902 else if (section_is_p (sectp
->name
, &names
.loclists
))
1904 this->loclists
.s
.section
= sectp
;
1905 this->loclists
.size
= bfd_section_size (sectp
);
1907 else if (section_is_p (sectp
->name
, &names
.macinfo
))
1909 this->macinfo
.s
.section
= sectp
;
1910 this->macinfo
.size
= bfd_section_size (sectp
);
1912 else if (section_is_p (sectp
->name
, &names
.macro
))
1914 this->macro
.s
.section
= sectp
;
1915 this->macro
.size
= bfd_section_size (sectp
);
1917 else if (section_is_p (sectp
->name
, &names
.str
))
1919 this->str
.s
.section
= sectp
;
1920 this->str
.size
= bfd_section_size (sectp
);
1922 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
1924 this->str_offsets
.s
.section
= sectp
;
1925 this->str_offsets
.size
= bfd_section_size (sectp
);
1927 else if (section_is_p (sectp
->name
, &names
.line_str
))
1929 this->line_str
.s
.section
= sectp
;
1930 this->line_str
.size
= bfd_section_size (sectp
);
1932 else if (section_is_p (sectp
->name
, &names
.addr
))
1934 this->addr
.s
.section
= sectp
;
1935 this->addr
.size
= bfd_section_size (sectp
);
1937 else if (section_is_p (sectp
->name
, &names
.frame
))
1939 this->frame
.s
.section
= sectp
;
1940 this->frame
.size
= bfd_section_size (sectp
);
1942 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
1944 this->eh_frame
.s
.section
= sectp
;
1945 this->eh_frame
.size
= bfd_section_size (sectp
);
1947 else if (section_is_p (sectp
->name
, &names
.ranges
))
1949 this->ranges
.s
.section
= sectp
;
1950 this->ranges
.size
= bfd_section_size (sectp
);
1952 else if (section_is_p (sectp
->name
, &names
.rnglists
))
1954 this->rnglists
.s
.section
= sectp
;
1955 this->rnglists
.size
= bfd_section_size (sectp
);
1957 else if (section_is_p (sectp
->name
, &names
.types
))
1959 struct dwarf2_section_info type_section
;
1961 memset (&type_section
, 0, sizeof (type_section
));
1962 type_section
.s
.section
= sectp
;
1963 type_section
.size
= bfd_section_size (sectp
);
1965 this->types
.push_back (type_section
);
1967 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
1969 this->gdb_index
.s
.section
= sectp
;
1970 this->gdb_index
.size
= bfd_section_size (sectp
);
1972 else if (section_is_p (sectp
->name
, &names
.debug_names
))
1974 this->debug_names
.s
.section
= sectp
;
1975 this->debug_names
.size
= bfd_section_size (sectp
);
1977 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
1979 this->debug_aranges
.s
.section
= sectp
;
1980 this->debug_aranges
.size
= bfd_section_size (sectp
);
1983 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
1984 && bfd_section_vma (sectp
) == 0)
1985 this->has_section_at_zero
= true;
1988 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1992 dwarf2_get_section_info (struct objfile
*objfile
,
1993 enum dwarf2_section_enum sect
,
1994 asection
**sectp
, const gdb_byte
**bufp
,
1995 bfd_size_type
*sizep
)
1997 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
1998 struct dwarf2_section_info
*info
;
2000 /* We may see an objfile without any DWARF, in which case we just
2011 case DWARF2_DEBUG_FRAME
:
2012 info
= &data
->frame
;
2014 case DWARF2_EH_FRAME
:
2015 info
= &data
->eh_frame
;
2018 gdb_assert_not_reached ("unexpected section");
2021 info
->read (objfile
);
2023 *sectp
= info
->get_bfd_section ();
2024 *bufp
= info
->buffer
;
2025 *sizep
= info
->size
;
2028 /* A helper function to find the sections for a .dwz file. */
2031 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2033 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2035 /* Note that we only support the standard ELF names, because .dwz
2036 is ELF-only (at the time of writing). */
2037 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2039 dwz_file
->abbrev
.s
.section
= sectp
;
2040 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2042 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2044 dwz_file
->info
.s
.section
= sectp
;
2045 dwz_file
->info
.size
= bfd_section_size (sectp
);
2047 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2049 dwz_file
->str
.s
.section
= sectp
;
2050 dwz_file
->str
.size
= bfd_section_size (sectp
);
2052 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2054 dwz_file
->line
.s
.section
= sectp
;
2055 dwz_file
->line
.size
= bfd_section_size (sectp
);
2057 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2059 dwz_file
->macro
.s
.section
= sectp
;
2060 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2062 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2064 dwz_file
->gdb_index
.s
.section
= sectp
;
2065 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2067 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2069 dwz_file
->debug_names
.s
.section
= sectp
;
2070 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2074 /* See dwarf2read.h. */
2077 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2079 const char *filename
;
2080 bfd_size_type buildid_len_arg
;
2084 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2085 return dwarf2_per_objfile
->dwz_file
.get ();
2087 bfd_set_error (bfd_error_no_error
);
2088 gdb::unique_xmalloc_ptr
<char> data
2089 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2090 &buildid_len_arg
, &buildid
));
2093 if (bfd_get_error () == bfd_error_no_error
)
2095 error (_("could not read '.gnu_debugaltlink' section: %s"),
2096 bfd_errmsg (bfd_get_error ()));
2099 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2101 buildid_len
= (size_t) buildid_len_arg
;
2103 filename
= data
.get ();
2105 std::string abs_storage
;
2106 if (!IS_ABSOLUTE_PATH (filename
))
2108 gdb::unique_xmalloc_ptr
<char> abs
2109 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2111 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2112 filename
= abs_storage
.c_str ();
2115 /* First try the file name given in the section. If that doesn't
2116 work, try to use the build-id instead. */
2117 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2118 if (dwz_bfd
!= NULL
)
2120 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2121 dwz_bfd
.reset (nullptr);
2124 if (dwz_bfd
== NULL
)
2125 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2127 if (dwz_bfd
== nullptr)
2129 gdb::unique_xmalloc_ptr
<char> alt_filename
;
2130 const char *origname
= dwarf2_per_objfile
->objfile
->original_name
;
2132 scoped_fd
fd (debuginfod_debuginfo_query (buildid
,
2139 /* File successfully retrieved from server. */
2140 dwz_bfd
= gdb_bfd_open (alt_filename
.get (), gnutarget
, -1);
2142 if (dwz_bfd
== nullptr)
2143 warning (_("File \"%s\" from debuginfod cannot be opened as bfd"),
2144 alt_filename
.get ());
2145 else if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2146 dwz_bfd
.reset (nullptr);
2150 if (dwz_bfd
== NULL
)
2151 error (_("could not find '.gnu_debugaltlink' file for %s"),
2152 objfile_name (dwarf2_per_objfile
->objfile
));
2154 std::unique_ptr
<struct dwz_file
> result
2155 (new struct dwz_file (std::move (dwz_bfd
)));
2157 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2160 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2161 result
->dwz_bfd
.get ());
2162 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2163 return dwarf2_per_objfile
->dwz_file
.get ();
2166 /* DWARF quick_symbols_functions support. */
2168 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2169 unique line tables, so we maintain a separate table of all .debug_line
2170 derived entries to support the sharing.
2171 All the quick functions need is the list of file names. We discard the
2172 line_header when we're done and don't need to record it here. */
2173 struct quick_file_names
2175 /* The data used to construct the hash key. */
2176 struct stmt_list_hash hash
;
2178 /* The number of entries in file_names, real_names. */
2179 unsigned int num_file_names
;
2181 /* The file names from the line table, after being run through
2183 const char **file_names
;
2185 /* The file names from the line table after being run through
2186 gdb_realpath. These are computed lazily. */
2187 const char **real_names
;
2190 /* When using the index (and thus not using psymtabs), each CU has an
2191 object of this type. This is used to hold information needed by
2192 the various "quick" methods. */
2193 struct dwarf2_per_cu_quick_data
2195 /* The file table. This can be NULL if there was no file table
2196 or it's currently not read in.
2197 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2198 struct quick_file_names
*file_names
;
2200 /* The corresponding symbol table. This is NULL if symbols for this
2201 CU have not yet been read. */
2202 struct compunit_symtab
*compunit_symtab
;
2204 /* A temporary mark bit used when iterating over all CUs in
2205 expand_symtabs_matching. */
2206 unsigned int mark
: 1;
2208 /* True if we've tried to read the file table and found there isn't one.
2209 There will be no point in trying to read it again next time. */
2210 unsigned int no_file_data
: 1;
2213 /* Utility hash function for a stmt_list_hash. */
2216 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2220 if (stmt_list_hash
->dwo_unit
!= NULL
)
2221 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2222 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2226 /* Utility equality function for a stmt_list_hash. */
2229 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2230 const struct stmt_list_hash
*rhs
)
2232 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2234 if (lhs
->dwo_unit
!= NULL
2235 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2238 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2241 /* Hash function for a quick_file_names. */
2244 hash_file_name_entry (const void *e
)
2246 const struct quick_file_names
*file_data
2247 = (const struct quick_file_names
*) e
;
2249 return hash_stmt_list_entry (&file_data
->hash
);
2252 /* Equality function for a quick_file_names. */
2255 eq_file_name_entry (const void *a
, const void *b
)
2257 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2258 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2260 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2263 /* Delete function for a quick_file_names. */
2266 delete_file_name_entry (void *e
)
2268 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2271 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2273 xfree ((void*) file_data
->file_names
[i
]);
2274 if (file_data
->real_names
)
2275 xfree ((void*) file_data
->real_names
[i
]);
2278 /* The space for the struct itself lives on objfile_obstack,
2279 so we don't free it here. */
2282 /* Create a quick_file_names hash table. */
2285 create_quick_file_names_table (unsigned int nr_initial_entries
)
2287 return htab_up (htab_create_alloc (nr_initial_entries
,
2288 hash_file_name_entry
, eq_file_name_entry
,
2289 delete_file_name_entry
, xcalloc
, xfree
));
2292 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2293 have to be created afterwards. You should call age_cached_comp_units after
2294 processing PER_CU->CU. dw2_setup must have been already called. */
2297 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2299 if (per_cu
->is_debug_types
)
2300 load_full_type_unit (per_cu
);
2302 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2304 if (per_cu
->cu
== NULL
)
2305 return; /* Dummy CU. */
2307 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2310 /* Read in the symbols for PER_CU. */
2313 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2315 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2317 /* Skip type_unit_groups, reading the type units they contain
2318 is handled elsewhere. */
2319 if (per_cu
->type_unit_group_p ())
2322 /* The destructor of dwarf2_queue_guard frees any entries left on
2323 the queue. After this point we're guaranteed to leave this function
2324 with the dwarf queue empty. */
2325 dwarf2_queue_guard
q_guard (dwarf2_per_objfile
);
2327 if (dwarf2_per_objfile
->using_index
2328 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2329 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2331 queue_comp_unit (per_cu
, language_minimal
);
2332 load_cu (per_cu
, skip_partial
);
2334 /* If we just loaded a CU from a DWO, and we're working with an index
2335 that may badly handle TUs, load all the TUs in that DWO as well.
2336 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2337 if (!per_cu
->is_debug_types
2338 && per_cu
->cu
!= NULL
2339 && per_cu
->cu
->dwo_unit
!= NULL
2340 && dwarf2_per_objfile
->index_table
!= NULL
2341 && dwarf2_per_objfile
->index_table
->version
<= 7
2342 /* DWP files aren't supported yet. */
2343 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2344 queue_and_load_all_dwo_tus (per_cu
);
2347 process_queue (dwarf2_per_objfile
);
2349 /* Age the cache, releasing compilation units that have not
2350 been used recently. */
2351 age_cached_comp_units (dwarf2_per_objfile
);
2354 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2355 the objfile from which this CU came. Returns the resulting symbol
2358 static struct compunit_symtab
*
2359 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2361 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2363 gdb_assert (dwarf2_per_objfile
->using_index
);
2364 if (!per_cu
->v
.quick
->compunit_symtab
)
2366 free_cached_comp_units
freer (dwarf2_per_objfile
);
2367 scoped_restore decrementer
= increment_reading_symtab ();
2368 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2369 process_cu_includes (dwarf2_per_objfile
);
2372 return per_cu
->v
.quick
->compunit_symtab
;
2375 /* See declaration. */
2377 dwarf2_per_cu_data
*
2378 dwarf2_per_objfile::get_cutu (int index
)
2380 if (index
>= this->all_comp_units
.size ())
2382 index
-= this->all_comp_units
.size ();
2383 gdb_assert (index
< this->all_type_units
.size ());
2384 return &this->all_type_units
[index
]->per_cu
;
2387 return this->all_comp_units
[index
];
2390 /* See declaration. */
2392 dwarf2_per_cu_data
*
2393 dwarf2_per_objfile::get_cu (int index
)
2395 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2397 return this->all_comp_units
[index
];
2400 /* See declaration. */
2403 dwarf2_per_objfile::get_tu (int index
)
2405 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2407 return this->all_type_units
[index
];
2410 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2411 objfile_obstack, and constructed with the specified field
2414 static dwarf2_per_cu_data
*
2415 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2416 struct dwarf2_section_info
*section
,
2418 sect_offset sect_off
, ULONGEST length
)
2420 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2421 dwarf2_per_cu_data
*the_cu
2422 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2423 struct dwarf2_per_cu_data
);
2424 the_cu
->sect_off
= sect_off
;
2425 the_cu
->length
= length
;
2426 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2427 the_cu
->section
= section
;
2428 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2429 struct dwarf2_per_cu_quick_data
);
2430 the_cu
->is_dwz
= is_dwz
;
2434 /* A helper for create_cus_from_index that handles a given list of
2438 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2439 const gdb_byte
*cu_list
, offset_type n_elements
,
2440 struct dwarf2_section_info
*section
,
2443 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2445 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2447 sect_offset sect_off
2448 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2449 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2452 dwarf2_per_cu_data
*per_cu
2453 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2455 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
2459 /* Read the CU list from the mapped index, and use it to create all
2460 the CU objects for this objfile. */
2463 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2464 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2465 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2467 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
2468 dwarf2_per_objfile
->all_comp_units
.reserve
2469 ((cu_list_elements
+ dwz_elements
) / 2);
2471 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
2472 &dwarf2_per_objfile
->info
, 0);
2474 if (dwz_elements
== 0)
2477 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
2478 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
2482 /* Create the signatured type hash table from the index. */
2485 create_signatured_type_table_from_index
2486 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2487 struct dwarf2_section_info
*section
,
2488 const gdb_byte
*bytes
,
2489 offset_type elements
)
2491 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2493 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2494 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
2496 htab_up sig_types_hash
= allocate_signatured_type_table ();
2498 for (offset_type i
= 0; i
< elements
; i
+= 3)
2500 struct signatured_type
*sig_type
;
2503 cu_offset type_offset_in_tu
;
2505 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2506 sect_offset sect_off
2507 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2509 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2511 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2514 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2515 struct signatured_type
);
2516 sig_type
->signature
= signature
;
2517 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2518 sig_type
->per_cu
.is_debug_types
= 1;
2519 sig_type
->per_cu
.section
= section
;
2520 sig_type
->per_cu
.sect_off
= sect_off
;
2521 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2522 sig_type
->per_cu
.v
.quick
2523 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2524 struct dwarf2_per_cu_quick_data
);
2526 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2529 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2532 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2535 /* Create the signatured type hash table from .debug_names. */
2538 create_signatured_type_table_from_debug_names
2539 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2540 const mapped_debug_names
&map
,
2541 struct dwarf2_section_info
*section
,
2542 struct dwarf2_section_info
*abbrev_section
)
2544 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2546 section
->read (objfile
);
2547 abbrev_section
->read (objfile
);
2549 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2550 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
2552 htab_up sig_types_hash
= allocate_signatured_type_table ();
2554 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2556 struct signatured_type
*sig_type
;
2559 sect_offset sect_off
2560 = (sect_offset
) (extract_unsigned_integer
2561 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2563 map
.dwarf5_byte_order
));
2565 comp_unit_head cu_header
;
2566 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
2568 section
->buffer
+ to_underlying (sect_off
),
2571 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2572 struct signatured_type
);
2573 sig_type
->signature
= cu_header
.signature
;
2574 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2575 sig_type
->per_cu
.is_debug_types
= 1;
2576 sig_type
->per_cu
.section
= section
;
2577 sig_type
->per_cu
.sect_off
= sect_off
;
2578 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2579 sig_type
->per_cu
.v
.quick
2580 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2581 struct dwarf2_per_cu_quick_data
);
2583 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2586 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2589 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2592 /* Read the address map data from the mapped index, and use it to
2593 populate the objfile's psymtabs_addrmap. */
2596 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2597 struct mapped_index
*index
)
2599 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2600 struct gdbarch
*gdbarch
= objfile
->arch ();
2601 const gdb_byte
*iter
, *end
;
2602 struct addrmap
*mutable_map
;
2605 auto_obstack temp_obstack
;
2607 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2609 iter
= index
->address_table
.data ();
2610 end
= iter
+ index
->address_table
.size ();
2612 baseaddr
= objfile
->text_section_offset ();
2616 ULONGEST hi
, lo
, cu_index
;
2617 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2619 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2621 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2626 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2627 hex_string (lo
), hex_string (hi
));
2631 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
2633 complaint (_(".gdb_index address table has invalid CU number %u"),
2634 (unsigned) cu_index
);
2638 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2639 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2640 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2641 dwarf2_per_objfile
->get_cu (cu_index
));
2644 objfile
->partial_symtabs
->psymtabs_addrmap
2645 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2648 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2649 populate the objfile's psymtabs_addrmap. */
2652 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2653 struct dwarf2_section_info
*section
)
2655 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2656 bfd
*abfd
= objfile
->obfd
;
2657 struct gdbarch
*gdbarch
= objfile
->arch ();
2658 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2660 auto_obstack temp_obstack
;
2661 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2663 std::unordered_map
<sect_offset
,
2664 dwarf2_per_cu_data
*,
2665 gdb::hash_enum
<sect_offset
>>
2666 debug_info_offset_to_per_cu
;
2667 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
2669 const auto insertpair
2670 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2671 if (!insertpair
.second
)
2673 warning (_("Section .debug_aranges in %s has duplicate "
2674 "debug_info_offset %s, ignoring .debug_aranges."),
2675 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2680 section
->read (objfile
);
2682 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2684 const gdb_byte
*addr
= section
->buffer
;
2686 while (addr
< section
->buffer
+ section
->size
)
2688 const gdb_byte
*const entry_addr
= addr
;
2689 unsigned int bytes_read
;
2691 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2695 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2696 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2697 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2698 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2700 warning (_("Section .debug_aranges in %s entry at offset %s "
2701 "length %s exceeds section length %s, "
2702 "ignoring .debug_aranges."),
2703 objfile_name (objfile
),
2704 plongest (entry_addr
- section
->buffer
),
2705 plongest (bytes_read
+ entry_length
),
2706 pulongest (section
->size
));
2710 /* The version number. */
2711 const uint16_t version
= read_2_bytes (abfd
, addr
);
2715 warning (_("Section .debug_aranges in %s entry at offset %s "
2716 "has unsupported version %d, ignoring .debug_aranges."),
2717 objfile_name (objfile
),
2718 plongest (entry_addr
- section
->buffer
), version
);
2722 const uint64_t debug_info_offset
2723 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2724 addr
+= offset_size
;
2725 const auto per_cu_it
2726 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2727 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2729 warning (_("Section .debug_aranges in %s entry at offset %s "
2730 "debug_info_offset %s does not exists, "
2731 "ignoring .debug_aranges."),
2732 objfile_name (objfile
),
2733 plongest (entry_addr
- section
->buffer
),
2734 pulongest (debug_info_offset
));
2737 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2739 const uint8_t address_size
= *addr
++;
2740 if (address_size
< 1 || address_size
> 8)
2742 warning (_("Section .debug_aranges in %s entry at offset %s "
2743 "address_size %u is invalid, ignoring .debug_aranges."),
2744 objfile_name (objfile
),
2745 plongest (entry_addr
- section
->buffer
), address_size
);
2749 const uint8_t segment_selector_size
= *addr
++;
2750 if (segment_selector_size
!= 0)
2752 warning (_("Section .debug_aranges in %s entry at offset %s "
2753 "segment_selector_size %u is not supported, "
2754 "ignoring .debug_aranges."),
2755 objfile_name (objfile
),
2756 plongest (entry_addr
- section
->buffer
),
2757 segment_selector_size
);
2761 /* Must pad to an alignment boundary that is twice the address
2762 size. It is undocumented by the DWARF standard but GCC does
2764 for (size_t padding
= ((-(addr
- section
->buffer
))
2765 & (2 * address_size
- 1));
2766 padding
> 0; padding
--)
2769 warning (_("Section .debug_aranges in %s entry at offset %s "
2770 "padding is not zero, ignoring .debug_aranges."),
2771 objfile_name (objfile
),
2772 plongest (entry_addr
- section
->buffer
));
2778 if (addr
+ 2 * address_size
> entry_end
)
2780 warning (_("Section .debug_aranges in %s entry at offset %s "
2781 "address list is not properly terminated, "
2782 "ignoring .debug_aranges."),
2783 objfile_name (objfile
),
2784 plongest (entry_addr
- section
->buffer
));
2787 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
2789 addr
+= address_size
;
2790 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
2792 addr
+= address_size
;
2793 if (start
== 0 && length
== 0)
2795 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
2797 /* Symbol was eliminated due to a COMDAT group. */
2800 ULONGEST end
= start
+ length
;
2801 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
2803 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
2805 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
2809 objfile
->partial_symtabs
->psymtabs_addrmap
2810 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2813 /* Find a slot in the mapped index INDEX for the object named NAME.
2814 If NAME is found, set *VEC_OUT to point to the CU vector in the
2815 constant pool and return true. If NAME cannot be found, return
2819 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2820 offset_type
**vec_out
)
2823 offset_type slot
, step
;
2824 int (*cmp
) (const char *, const char *);
2826 gdb::unique_xmalloc_ptr
<char> without_params
;
2827 if (current_language
->la_language
== language_cplus
2828 || current_language
->la_language
== language_fortran
2829 || current_language
->la_language
== language_d
)
2831 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2834 if (strchr (name
, '(') != NULL
)
2836 without_params
= cp_remove_params (name
);
2838 if (without_params
!= NULL
)
2839 name
= without_params
.get ();
2843 /* Index version 4 did not support case insensitive searches. But the
2844 indices for case insensitive languages are built in lowercase, therefore
2845 simulate our NAME being searched is also lowercased. */
2846 hash
= mapped_index_string_hash ((index
->version
== 4
2847 && case_sensitivity
== case_sensitive_off
2848 ? 5 : index
->version
),
2851 slot
= hash
& (index
->symbol_table
.size () - 1);
2852 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
2853 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2859 const auto &bucket
= index
->symbol_table
[slot
];
2860 if (bucket
.name
== 0 && bucket
.vec
== 0)
2863 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
2864 if (!cmp (name
, str
))
2866 *vec_out
= (offset_type
*) (index
->constant_pool
2867 + MAYBE_SWAP (bucket
.vec
));
2871 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
2875 /* A helper function that reads the .gdb_index from BUFFER and fills
2876 in MAP. FILENAME is the name of the file containing the data;
2877 it is used for error reporting. DEPRECATED_OK is true if it is
2878 ok to use deprecated sections.
2880 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2881 out parameters that are filled in with information about the CU and
2882 TU lists in the section.
2884 Returns true if all went well, false otherwise. */
2887 read_gdb_index_from_buffer (const char *filename
,
2889 gdb::array_view
<const gdb_byte
> buffer
,
2890 struct mapped_index
*map
,
2891 const gdb_byte
**cu_list
,
2892 offset_type
*cu_list_elements
,
2893 const gdb_byte
**types_list
,
2894 offset_type
*types_list_elements
)
2896 const gdb_byte
*addr
= &buffer
[0];
2898 /* Version check. */
2899 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
2900 /* Versions earlier than 3 emitted every copy of a psymbol. This
2901 causes the index to behave very poorly for certain requests. Version 3
2902 contained incomplete addrmap. So, it seems better to just ignore such
2906 static int warning_printed
= 0;
2907 if (!warning_printed
)
2909 warning (_("Skipping obsolete .gdb_index section in %s."),
2911 warning_printed
= 1;
2915 /* Index version 4 uses a different hash function than index version
2918 Versions earlier than 6 did not emit psymbols for inlined
2919 functions. Using these files will cause GDB not to be able to
2920 set breakpoints on inlined functions by name, so we ignore these
2921 indices unless the user has done
2922 "set use-deprecated-index-sections on". */
2923 if (version
< 6 && !deprecated_ok
)
2925 static int warning_printed
= 0;
2926 if (!warning_printed
)
2929 Skipping deprecated .gdb_index section in %s.\n\
2930 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2931 to use the section anyway."),
2933 warning_printed
= 1;
2937 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2938 of the TU (for symbols coming from TUs),
2939 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
2940 Plus gold-generated indices can have duplicate entries for global symbols,
2941 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
2942 These are just performance bugs, and we can't distinguish gdb-generated
2943 indices from gold-generated ones, so issue no warning here. */
2945 /* Indexes with higher version than the one supported by GDB may be no
2946 longer backward compatible. */
2950 map
->version
= version
;
2952 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2955 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2956 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2960 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2961 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2962 - MAYBE_SWAP (metadata
[i
]))
2966 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2967 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2969 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
2972 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2973 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2975 = gdb::array_view
<mapped_index::symbol_table_slot
>
2976 ((mapped_index::symbol_table_slot
*) symbol_table
,
2977 (mapped_index::symbol_table_slot
*) symbol_table_end
);
2980 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
2985 /* Callback types for dwarf2_read_gdb_index. */
2987 typedef gdb::function_view
2988 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
2989 get_gdb_index_contents_ftype
;
2990 typedef gdb::function_view
2991 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
2992 get_gdb_index_contents_dwz_ftype
;
2994 /* Read .gdb_index. If everything went ok, initialize the "quick"
2995 elements of all the CUs and return 1. Otherwise, return 0. */
2998 dwarf2_read_gdb_index
2999 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3000 get_gdb_index_contents_ftype get_gdb_index_contents
,
3001 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3003 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3004 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3005 struct dwz_file
*dwz
;
3006 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3008 gdb::array_view
<const gdb_byte
> main_index_contents
3009 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3011 if (main_index_contents
.empty ())
3014 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3015 if (!read_gdb_index_from_buffer (objfile_name (objfile
),
3016 use_deprecated_index_sections
,
3017 main_index_contents
, map
.get (), &cu_list
,
3018 &cu_list_elements
, &types_list
,
3019 &types_list_elements
))
3022 /* Don't use the index if it's empty. */
3023 if (map
->symbol_table
.empty ())
3026 /* If there is a .dwz file, read it so we can get its CU list as
3028 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3031 struct mapped_index dwz_map
;
3032 const gdb_byte
*dwz_types_ignore
;
3033 offset_type dwz_types_elements_ignore
;
3035 gdb::array_view
<const gdb_byte
> dwz_index_content
3036 = get_gdb_index_contents_dwz (objfile
, dwz
);
3038 if (dwz_index_content
.empty ())
3041 if (!read_gdb_index_from_buffer (bfd_get_filename (dwz
->dwz_bfd
.get ()),
3042 1, dwz_index_content
, &dwz_map
,
3043 &dwz_list
, &dwz_list_elements
,
3045 &dwz_types_elements_ignore
))
3047 warning (_("could not read '.gdb_index' section from %s; skipping"),
3048 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3053 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3054 dwz_list
, dwz_list_elements
);
3056 if (types_list_elements
)
3058 /* We can only handle a single .debug_types when we have an
3060 if (dwarf2_per_objfile
->types
.size () != 1)
3063 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
3065 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3066 types_list
, types_list_elements
);
3069 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3071 dwarf2_per_objfile
->index_table
= std::move (map
);
3072 dwarf2_per_objfile
->using_index
= 1;
3073 dwarf2_per_objfile
->quick_file_names_table
=
3074 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3079 /* die_reader_func for dw2_get_file_names. */
3082 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3083 const gdb_byte
*info_ptr
,
3084 struct die_info
*comp_unit_die
)
3086 struct dwarf2_cu
*cu
= reader
->cu
;
3087 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3088 struct dwarf2_per_objfile
*dwarf2_per_objfile
3089 = cu
->per_cu
->dwarf2_per_objfile
;
3090 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3091 struct dwarf2_per_cu_data
*lh_cu
;
3092 struct attribute
*attr
;
3094 struct quick_file_names
*qfn
;
3096 gdb_assert (! this_cu
->is_debug_types
);
3098 /* Our callers never want to match partial units -- instead they
3099 will match the enclosing full CU. */
3100 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3102 this_cu
->v
.quick
->no_file_data
= 1;
3110 sect_offset line_offset
{};
3112 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3113 if (attr
!= nullptr)
3115 struct quick_file_names find_entry
;
3117 line_offset
= (sect_offset
) DW_UNSND (attr
);
3119 /* We may have already read in this line header (TU line header sharing).
3120 If we have we're done. */
3121 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3122 find_entry
.hash
.line_sect_off
= line_offset
;
3123 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
.get (),
3124 &find_entry
, INSERT
);
3127 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3131 lh
= dwarf_decode_line_header (line_offset
, cu
);
3135 lh_cu
->v
.quick
->no_file_data
= 1;
3139 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3140 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3141 qfn
->hash
.line_sect_off
= line_offset
;
3142 gdb_assert (slot
!= NULL
);
3145 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3148 if (strcmp (fnd
.name
, "<unknown>") != 0)
3151 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3153 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, qfn
->num_file_names
);
3155 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3156 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3157 qfn
->file_names
[i
+ offset
] = lh
->file_full_name (i
+ 1,
3158 fnd
.comp_dir
).release ();
3159 qfn
->real_names
= NULL
;
3161 lh_cu
->v
.quick
->file_names
= qfn
;
3164 /* A helper for the "quick" functions which attempts to read the line
3165 table for THIS_CU. */
3167 static struct quick_file_names
*
3168 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3170 /* This should never be called for TUs. */
3171 gdb_assert (! this_cu
->is_debug_types
);
3172 /* Nor type unit groups. */
3173 gdb_assert (! this_cu
->type_unit_group_p ());
3175 if (this_cu
->v
.quick
->file_names
!= NULL
)
3176 return this_cu
->v
.quick
->file_names
;
3177 /* If we know there is no line data, no point in looking again. */
3178 if (this_cu
->v
.quick
->no_file_data
)
3181 cutu_reader
reader (this_cu
);
3182 if (!reader
.dummy_p
)
3183 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3185 if (this_cu
->v
.quick
->no_file_data
)
3187 return this_cu
->v
.quick
->file_names
;
3190 /* A helper for the "quick" functions which computes and caches the
3191 real path for a given file name from the line table. */
3194 dw2_get_real_path (struct objfile
*objfile
,
3195 struct quick_file_names
*qfn
, int index
)
3197 if (qfn
->real_names
== NULL
)
3198 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3199 qfn
->num_file_names
, const char *);
3201 if (qfn
->real_names
[index
] == NULL
)
3202 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3204 return qfn
->real_names
[index
];
3207 static struct symtab
*
3208 dw2_find_last_source_symtab (struct objfile
*objfile
)
3210 struct dwarf2_per_objfile
*dwarf2_per_objfile
3211 = get_dwarf2_per_objfile (objfile
);
3212 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3213 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3218 return compunit_primary_filetab (cust
);
3221 /* Traversal function for dw2_forget_cached_source_info. */
3224 dw2_free_cached_file_names (void **slot
, void *info
)
3226 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3228 if (file_data
->real_names
)
3232 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3234 xfree ((void*) file_data
->real_names
[i
]);
3235 file_data
->real_names
[i
] = NULL
;
3243 dw2_forget_cached_source_info (struct objfile
*objfile
)
3245 struct dwarf2_per_objfile
*dwarf2_per_objfile
3246 = get_dwarf2_per_objfile (objfile
);
3248 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
.get (),
3249 dw2_free_cached_file_names
, NULL
);
3252 /* Helper function for dw2_map_symtabs_matching_filename that expands
3253 the symtabs and calls the iterator. */
3256 dw2_map_expand_apply (struct objfile
*objfile
,
3257 struct dwarf2_per_cu_data
*per_cu
,
3258 const char *name
, const char *real_path
,
3259 gdb::function_view
<bool (symtab
*)> callback
)
3261 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3263 /* Don't visit already-expanded CUs. */
3264 if (per_cu
->v
.quick
->compunit_symtab
)
3267 /* This may expand more than one symtab, and we want to iterate over
3269 dw2_instantiate_symtab (per_cu
, false);
3271 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3272 last_made
, callback
);
3275 /* Implementation of the map_symtabs_matching_filename method. */
3278 dw2_map_symtabs_matching_filename
3279 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3280 gdb::function_view
<bool (symtab
*)> callback
)
3282 const char *name_basename
= lbasename (name
);
3283 struct dwarf2_per_objfile
*dwarf2_per_objfile
3284 = get_dwarf2_per_objfile (objfile
);
3286 /* The rule is CUs specify all the files, including those used by
3287 any TU, so there's no need to scan TUs here. */
3289 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3291 /* We only need to look at symtabs not already expanded. */
3292 if (per_cu
->v
.quick
->compunit_symtab
)
3295 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3296 if (file_data
== NULL
)
3299 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3301 const char *this_name
= file_data
->file_names
[j
];
3302 const char *this_real_name
;
3304 if (compare_filenames_for_search (this_name
, name
))
3306 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3312 /* Before we invoke realpath, which can get expensive when many
3313 files are involved, do a quick comparison of the basenames. */
3314 if (! basenames_may_differ
3315 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3318 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3319 if (compare_filenames_for_search (this_real_name
, name
))
3321 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3327 if (real_path
!= NULL
)
3329 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3330 gdb_assert (IS_ABSOLUTE_PATH (name
));
3331 if (this_real_name
!= NULL
3332 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3334 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3346 /* Struct used to manage iterating over all CUs looking for a symbol. */
3348 struct dw2_symtab_iterator
3350 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3351 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3352 /* If set, only look for symbols that match that block. Valid values are
3353 GLOBAL_BLOCK and STATIC_BLOCK. */
3354 gdb::optional
<block_enum
> block_index
;
3355 /* The kind of symbol we're looking for. */
3357 /* The list of CUs from the index entry of the symbol,
3358 or NULL if not found. */
3360 /* The next element in VEC to look at. */
3362 /* The number of elements in VEC, or zero if there is no match. */
3364 /* Have we seen a global version of the symbol?
3365 If so we can ignore all further global instances.
3366 This is to work around gold/15646, inefficient gold-generated
3371 /* Initialize the index symtab iterator ITER. */
3374 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3375 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3376 gdb::optional
<block_enum
> block_index
,
3380 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3381 iter
->block_index
= block_index
;
3382 iter
->domain
= domain
;
3384 iter
->global_seen
= 0;
3386 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3388 /* index is NULL if OBJF_READNOW. */
3389 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3390 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3398 /* Return the next matching CU or NULL if there are no more. */
3400 static struct dwarf2_per_cu_data
*
3401 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3403 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3405 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3407 offset_type cu_index_and_attrs
=
3408 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3409 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3410 gdb_index_symbol_kind symbol_kind
=
3411 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3412 /* Only check the symbol attributes if they're present.
3413 Indices prior to version 7 don't record them,
3414 and indices >= 7 may elide them for certain symbols
3415 (gold does this). */
3417 (dwarf2_per_objfile
->index_table
->version
>= 7
3418 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3420 /* Don't crash on bad data. */
3421 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3422 + dwarf2_per_objfile
->all_type_units
.size ()))
3424 complaint (_(".gdb_index entry has bad CU index"
3426 objfile_name (dwarf2_per_objfile
->objfile
));
3430 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3432 /* Skip if already read in. */
3433 if (per_cu
->v
.quick
->compunit_symtab
)
3436 /* Check static vs global. */
3439 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3441 if (iter
->block_index
.has_value ())
3443 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3445 if (is_static
!= want_static
)
3449 /* Work around gold/15646. */
3450 if (!is_static
&& iter
->global_seen
)
3453 iter
->global_seen
= 1;
3456 /* Only check the symbol's kind if it has one. */
3459 switch (iter
->domain
)
3462 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3463 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3464 /* Some types are also in VAR_DOMAIN. */
3465 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3469 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3473 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3477 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3492 static struct compunit_symtab
*
3493 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3494 const char *name
, domain_enum domain
)
3496 struct compunit_symtab
*stab_best
= NULL
;
3497 struct dwarf2_per_objfile
*dwarf2_per_objfile
3498 = get_dwarf2_per_objfile (objfile
);
3500 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3502 struct dw2_symtab_iterator iter
;
3503 struct dwarf2_per_cu_data
*per_cu
;
3505 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
3507 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3509 struct symbol
*sym
, *with_opaque
= NULL
;
3510 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
3511 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3512 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3514 sym
= block_find_symbol (block
, name
, domain
,
3515 block_find_non_opaque_type_preferred
,
3518 /* Some caution must be observed with overloaded functions
3519 and methods, since the index will not contain any overload
3520 information (but NAME might contain it). */
3523 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3525 if (with_opaque
!= NULL
3526 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3529 /* Keep looking through other CUs. */
3536 dw2_print_stats (struct objfile
*objfile
)
3538 struct dwarf2_per_objfile
*dwarf2_per_objfile
3539 = get_dwarf2_per_objfile (objfile
);
3540 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
3541 + dwarf2_per_objfile
->all_type_units
.size ());
3544 for (int i
= 0; i
< total
; ++i
)
3546 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3548 if (!per_cu
->v
.quick
->compunit_symtab
)
3551 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3552 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3555 /* This dumps minimal information about the index.
3556 It is called via "mt print objfiles".
3557 One use is to verify .gdb_index has been loaded by the
3558 gdb.dwarf2/gdb-index.exp testcase. */
3561 dw2_dump (struct objfile
*objfile
)
3563 struct dwarf2_per_objfile
*dwarf2_per_objfile
3564 = get_dwarf2_per_objfile (objfile
);
3566 gdb_assert (dwarf2_per_objfile
->using_index
);
3567 printf_filtered (".gdb_index:");
3568 if (dwarf2_per_objfile
->index_table
!= NULL
)
3570 printf_filtered (" version %d\n",
3571 dwarf2_per_objfile
->index_table
->version
);
3574 printf_filtered (" faked for \"readnow\"\n");
3575 printf_filtered ("\n");
3579 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3580 const char *func_name
)
3582 struct dwarf2_per_objfile
*dwarf2_per_objfile
3583 = get_dwarf2_per_objfile (objfile
);
3585 struct dw2_symtab_iterator iter
;
3586 struct dwarf2_per_cu_data
*per_cu
;
3588 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
3590 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3591 dw2_instantiate_symtab (per_cu
, false);
3596 dw2_expand_all_symtabs (struct objfile
*objfile
)
3598 struct dwarf2_per_objfile
*dwarf2_per_objfile
3599 = get_dwarf2_per_objfile (objfile
);
3600 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
3601 + dwarf2_per_objfile
->all_type_units
.size ());
3603 for (int i
= 0; i
< total_units
; ++i
)
3605 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3607 /* We don't want to directly expand a partial CU, because if we
3608 read it with the wrong language, then assertion failures can
3609 be triggered later on. See PR symtab/23010. So, tell
3610 dw2_instantiate_symtab to skip partial CUs -- any important
3611 partial CU will be read via DW_TAG_imported_unit anyway. */
3612 dw2_instantiate_symtab (per_cu
, true);
3617 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3618 const char *fullname
)
3620 struct dwarf2_per_objfile
*dwarf2_per_objfile
3621 = get_dwarf2_per_objfile (objfile
);
3623 /* We don't need to consider type units here.
3624 This is only called for examining code, e.g. expand_line_sal.
3625 There can be an order of magnitude (or more) more type units
3626 than comp units, and we avoid them if we can. */
3628 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3630 /* We only need to look at symtabs not already expanded. */
3631 if (per_cu
->v
.quick
->compunit_symtab
)
3634 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3635 if (file_data
== NULL
)
3638 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3640 const char *this_fullname
= file_data
->file_names
[j
];
3642 if (filename_cmp (this_fullname
, fullname
) == 0)
3644 dw2_instantiate_symtab (per_cu
, false);
3652 dw2_map_matching_symbols
3653 (struct objfile
*objfile
,
3654 const lookup_name_info
&name
, domain_enum domain
,
3656 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3657 symbol_compare_ftype
*ordered_compare
)
3660 struct dwarf2_per_objfile
*dwarf2_per_objfile
3661 = get_dwarf2_per_objfile (objfile
);
3663 if (dwarf2_per_objfile
->index_table
!= nullptr)
3665 /* Ada currently doesn't support .gdb_index (see PR24713). We can get
3666 here though if the current language is Ada for a non-Ada objfile
3667 using GNU index. As Ada does not look for non-Ada symbols this
3668 function should just return. */
3672 /* We have -readnow: no .gdb_index, but no partial symtabs either. So,
3673 inline psym_map_matching_symbols here, assuming all partial symtabs have
3675 const int block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
3677 for (compunit_symtab
*cust
: objfile
->compunits ())
3679 const struct block
*block
;
3683 block
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
3684 if (!iterate_over_symbols_terminated (block
, name
,
3690 /* Starting from a search name, return the string that finds the upper
3691 bound of all strings that start with SEARCH_NAME in a sorted name
3692 list. Returns the empty string to indicate that the upper bound is
3693 the end of the list. */
3696 make_sort_after_prefix_name (const char *search_name
)
3698 /* When looking to complete "func", we find the upper bound of all
3699 symbols that start with "func" by looking for where we'd insert
3700 the closest string that would follow "func" in lexicographical
3701 order. Usually, that's "func"-with-last-character-incremented,
3702 i.e. "fund". Mind non-ASCII characters, though. Usually those
3703 will be UTF-8 multi-byte sequences, but we can't be certain.
3704 Especially mind the 0xff character, which is a valid character in
3705 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3706 rule out compilers allowing it in identifiers. Note that
3707 conveniently, strcmp/strcasecmp are specified to compare
3708 characters interpreted as unsigned char. So what we do is treat
3709 the whole string as a base 256 number composed of a sequence of
3710 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3711 to 0, and carries 1 to the following more-significant position.
3712 If the very first character in SEARCH_NAME ends up incremented
3713 and carries/overflows, then the upper bound is the end of the
3714 list. The string after the empty string is also the empty
3717 Some examples of this operation:
3719 SEARCH_NAME => "+1" RESULT
3723 "\xff" "a" "\xff" => "\xff" "b"
3728 Then, with these symbols for example:
3734 completing "func" looks for symbols between "func" and
3735 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
3736 which finds "func" and "func1", but not "fund".
3740 funcÿ (Latin1 'ÿ' [0xff])
3744 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
3745 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
3749 ÿÿ (Latin1 'ÿ' [0xff])
3752 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
3753 the end of the list.
3755 std::string after
= search_name
;
3756 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
3758 if (!after
.empty ())
3759 after
.back () = (unsigned char) after
.back () + 1;
3763 /* See declaration. */
3765 std::pair
<std::vector
<name_component
>::const_iterator
,
3766 std::vector
<name_component
>::const_iterator
>
3767 mapped_index_base::find_name_components_bounds
3768 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
3771 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3773 const char *lang_name
3774 = lookup_name_without_params
.language_lookup_name (lang
);
3776 /* Comparison function object for lower_bound that matches against a
3777 given symbol name. */
3778 auto lookup_compare_lower
= [&] (const name_component
&elem
,
3781 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3782 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3783 return name_cmp (elem_name
, name
) < 0;
3786 /* Comparison function object for upper_bound that matches against a
3787 given symbol name. */
3788 auto lookup_compare_upper
= [&] (const char *name
,
3789 const name_component
&elem
)
3791 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3792 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3793 return name_cmp (name
, elem_name
) < 0;
3796 auto begin
= this->name_components
.begin ();
3797 auto end
= this->name_components
.end ();
3799 /* Find the lower bound. */
3802 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
3805 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
3808 /* Find the upper bound. */
3811 if (lookup_name_without_params
.completion_mode ())
3813 /* In completion mode, we want UPPER to point past all
3814 symbols names that have the same prefix. I.e., with
3815 these symbols, and completing "func":
3817 function << lower bound
3819 other_function << upper bound
3821 We find the upper bound by looking for the insertion
3822 point of "func"-with-last-character-incremented,
3824 std::string after
= make_sort_after_prefix_name (lang_name
);
3827 return std::lower_bound (lower
, end
, after
.c_str (),
3828 lookup_compare_lower
);
3831 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
3834 return {lower
, upper
};
3837 /* See declaration. */
3840 mapped_index_base::build_name_components ()
3842 if (!this->name_components
.empty ())
3845 this->name_components_casing
= case_sensitivity
;
3847 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3849 /* The code below only knows how to break apart components of C++
3850 symbol names (and other languages that use '::' as
3851 namespace/module separator) and Ada symbol names. */
3852 auto count
= this->symbol_name_count ();
3853 for (offset_type idx
= 0; idx
< count
; idx
++)
3855 if (this->symbol_name_slot_invalid (idx
))
3858 const char *name
= this->symbol_name_at (idx
);
3860 /* Add each name component to the name component table. */
3861 unsigned int previous_len
= 0;
3863 if (strstr (name
, "::") != nullptr)
3865 for (unsigned int current_len
= cp_find_first_component (name
);
3866 name
[current_len
] != '\0';
3867 current_len
+= cp_find_first_component (name
+ current_len
))
3869 gdb_assert (name
[current_len
] == ':');
3870 this->name_components
.push_back ({previous_len
, idx
});
3871 /* Skip the '::'. */
3873 previous_len
= current_len
;
3878 /* Handle the Ada encoded (aka mangled) form here. */
3879 for (const char *iter
= strstr (name
, "__");
3881 iter
= strstr (iter
, "__"))
3883 this->name_components
.push_back ({previous_len
, idx
});
3885 previous_len
= iter
- name
;
3889 this->name_components
.push_back ({previous_len
, idx
});
3892 /* Sort name_components elements by name. */
3893 auto name_comp_compare
= [&] (const name_component
&left
,
3894 const name_component
&right
)
3896 const char *left_qualified
= this->symbol_name_at (left
.idx
);
3897 const char *right_qualified
= this->symbol_name_at (right
.idx
);
3899 const char *left_name
= left_qualified
+ left
.name_offset
;
3900 const char *right_name
= right_qualified
+ right
.name_offset
;
3902 return name_cmp (left_name
, right_name
) < 0;
3905 std::sort (this->name_components
.begin (),
3906 this->name_components
.end (),
3910 /* Helper for dw2_expand_symtabs_matching that works with a
3911 mapped_index_base instead of the containing objfile. This is split
3912 to a separate function in order to be able to unit test the
3913 name_components matching using a mock mapped_index_base. For each
3914 symbol name that matches, calls MATCH_CALLBACK, passing it the
3915 symbol's index in the mapped_index_base symbol table. */
3918 dw2_expand_symtabs_matching_symbol
3919 (mapped_index_base
&index
,
3920 const lookup_name_info
&lookup_name_in
,
3921 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3922 enum search_domain kind
,
3923 gdb::function_view
<bool (offset_type
)> match_callback
)
3925 lookup_name_info lookup_name_without_params
3926 = lookup_name_in
.make_ignore_params ();
3928 /* Build the symbol name component sorted vector, if we haven't
3930 index
.build_name_components ();
3932 /* The same symbol may appear more than once in the range though.
3933 E.g., if we're looking for symbols that complete "w", and we have
3934 a symbol named "w1::w2", we'll find the two name components for
3935 that same symbol in the range. To be sure we only call the
3936 callback once per symbol, we first collect the symbol name
3937 indexes that matched in a temporary vector and ignore
3939 std::vector
<offset_type
> matches
;
3941 struct name_and_matcher
3943 symbol_name_matcher_ftype
*matcher
;
3946 bool operator== (const name_and_matcher
&other
) const
3948 return matcher
== other
.matcher
&& strcmp (name
, other
.name
) == 0;
3952 /* A vector holding all the different symbol name matchers, for all
3954 std::vector
<name_and_matcher
> matchers
;
3956 for (int i
= 0; i
< nr_languages
; i
++)
3958 enum language lang_e
= (enum language
) i
;
3960 const language_defn
*lang
= language_def (lang_e
);
3961 symbol_name_matcher_ftype
*name_matcher
3962 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
3964 name_and_matcher key
{
3966 lookup_name_without_params
.language_lookup_name (lang_e
)
3969 /* Don't insert the same comparison routine more than once.
3970 Note that we do this linear walk. This is not a problem in
3971 practice because the number of supported languages is
3973 if (std::find (matchers
.begin (), matchers
.end (), key
)
3976 matchers
.push_back (std::move (key
));
3979 = index
.find_name_components_bounds (lookup_name_without_params
,
3982 /* Now for each symbol name in range, check to see if we have a name
3983 match, and if so, call the MATCH_CALLBACK callback. */
3985 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
3987 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
3989 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
3990 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
3993 matches
.push_back (bounds
.first
->idx
);
3997 std::sort (matches
.begin (), matches
.end ());
3999 /* Finally call the callback, once per match. */
4001 for (offset_type idx
: matches
)
4005 if (!match_callback (idx
))
4011 /* Above we use a type wider than idx's for 'prev', since 0 and
4012 (offset_type)-1 are both possible values. */
4013 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4018 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4020 /* A mock .gdb_index/.debug_names-like name index table, enough to
4021 exercise dw2_expand_symtabs_matching_symbol, which works with the
4022 mapped_index_base interface. Builds an index from the symbol list
4023 passed as parameter to the constructor. */
4024 class mock_mapped_index
: public mapped_index_base
4027 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4028 : m_symbol_table (symbols
)
4031 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4033 /* Return the number of names in the symbol table. */
4034 size_t symbol_name_count () const override
4036 return m_symbol_table
.size ();
4039 /* Get the name of the symbol at IDX in the symbol table. */
4040 const char *symbol_name_at (offset_type idx
) const override
4042 return m_symbol_table
[idx
];
4046 gdb::array_view
<const char *> m_symbol_table
;
4049 /* Convenience function that converts a NULL pointer to a "<null>"
4050 string, to pass to print routines. */
4053 string_or_null (const char *str
)
4055 return str
!= NULL
? str
: "<null>";
4058 /* Check if a lookup_name_info built from
4059 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4060 index. EXPECTED_LIST is the list of expected matches, in expected
4061 matching order. If no match expected, then an empty list is
4062 specified. Returns true on success. On failure prints a warning
4063 indicating the file:line that failed, and returns false. */
4066 check_match (const char *file
, int line
,
4067 mock_mapped_index
&mock_index
,
4068 const char *name
, symbol_name_match_type match_type
,
4069 bool completion_mode
,
4070 std::initializer_list
<const char *> expected_list
)
4072 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4074 bool matched
= true;
4076 auto mismatch
= [&] (const char *expected_str
,
4079 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4080 "expected=\"%s\", got=\"%s\"\n"),
4082 (match_type
== symbol_name_match_type::FULL
4084 name
, string_or_null (expected_str
), string_or_null (got
));
4088 auto expected_it
= expected_list
.begin ();
4089 auto expected_end
= expected_list
.end ();
4091 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4093 [&] (offset_type idx
)
4095 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4096 const char *expected_str
4097 = expected_it
== expected_end
? NULL
: *expected_it
++;
4099 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4100 mismatch (expected_str
, matched_name
);
4104 const char *expected_str
4105 = expected_it
== expected_end
? NULL
: *expected_it
++;
4106 if (expected_str
!= NULL
)
4107 mismatch (expected_str
, NULL
);
4112 /* The symbols added to the mock mapped_index for testing (in
4114 static const char *test_symbols
[] = {
4123 "ns2::tmpl<int>::foo2",
4124 "(anonymous namespace)::A::B::C",
4126 /* These are used to check that the increment-last-char in the
4127 matching algorithm for completion doesn't match "t1_fund" when
4128 completing "t1_func". */
4134 /* A UTF-8 name with multi-byte sequences to make sure that
4135 cp-name-parser understands this as a single identifier ("função"
4136 is "function" in PT). */
4139 /* \377 (0xff) is Latin1 'ÿ'. */
4142 /* \377 (0xff) is Latin1 'ÿ'. */
4146 /* A name with all sorts of complications. Starts with "z" to make
4147 it easier for the completion tests below. */
4148 #define Z_SYM_NAME \
4149 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4150 "::tuple<(anonymous namespace)::ui*, " \
4151 "std::default_delete<(anonymous namespace)::ui>, void>"
4156 /* Returns true if the mapped_index_base::find_name_component_bounds
4157 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4158 in completion mode. */
4161 check_find_bounds_finds (mapped_index_base
&index
,
4162 const char *search_name
,
4163 gdb::array_view
<const char *> expected_syms
)
4165 lookup_name_info
lookup_name (search_name
,
4166 symbol_name_match_type::FULL
, true);
4168 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4171 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4172 if (distance
!= expected_syms
.size ())
4175 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4177 auto nc_elem
= bounds
.first
+ exp_elem
;
4178 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4179 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4186 /* Test the lower-level mapped_index::find_name_component_bounds
4190 test_mapped_index_find_name_component_bounds ()
4192 mock_mapped_index
mock_index (test_symbols
);
4194 mock_index
.build_name_components ();
4196 /* Test the lower-level mapped_index::find_name_component_bounds
4197 method in completion mode. */
4199 static const char *expected_syms
[] = {
4204 SELF_CHECK (check_find_bounds_finds (mock_index
,
4205 "t1_func", expected_syms
));
4208 /* Check that the increment-last-char in the name matching algorithm
4209 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4211 static const char *expected_syms1
[] = {
4215 SELF_CHECK (check_find_bounds_finds (mock_index
,
4216 "\377", expected_syms1
));
4218 static const char *expected_syms2
[] = {
4221 SELF_CHECK (check_find_bounds_finds (mock_index
,
4222 "\377\377", expected_syms2
));
4226 /* Test dw2_expand_symtabs_matching_symbol. */
4229 test_dw2_expand_symtabs_matching_symbol ()
4231 mock_mapped_index
mock_index (test_symbols
);
4233 /* We let all tests run until the end even if some fails, for debug
4235 bool any_mismatch
= false;
4237 /* Create the expected symbols list (an initializer_list). Needed
4238 because lists have commas, and we need to pass them to CHECK,
4239 which is a macro. */
4240 #define EXPECT(...) { __VA_ARGS__ }
4242 /* Wrapper for check_match that passes down the current
4243 __FILE__/__LINE__. */
4244 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4245 any_mismatch |= !check_match (__FILE__, __LINE__, \
4247 NAME, MATCH_TYPE, COMPLETION_MODE, \
4250 /* Identity checks. */
4251 for (const char *sym
: test_symbols
)
4253 /* Should be able to match all existing symbols. */
4254 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4257 /* Should be able to match all existing symbols with
4259 std::string with_params
= std::string (sym
) + "(int)";
4260 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4263 /* Should be able to match all existing symbols with
4264 parameters and qualifiers. */
4265 with_params
= std::string (sym
) + " ( int ) const";
4266 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4269 /* This should really find sym, but cp-name-parser.y doesn't
4270 know about lvalue/rvalue qualifiers yet. */
4271 with_params
= std::string (sym
) + " ( int ) &&";
4272 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4276 /* Check that the name matching algorithm for completion doesn't get
4277 confused with Latin1 'ÿ' / 0xff. */
4279 static const char str
[] = "\377";
4280 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4281 EXPECT ("\377", "\377\377123"));
4284 /* Check that the increment-last-char in the matching algorithm for
4285 completion doesn't match "t1_fund" when completing "t1_func". */
4287 static const char str
[] = "t1_func";
4288 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4289 EXPECT ("t1_func", "t1_func1"));
4292 /* Check that completion mode works at each prefix of the expected
4295 static const char str
[] = "function(int)";
4296 size_t len
= strlen (str
);
4299 for (size_t i
= 1; i
< len
; i
++)
4301 lookup
.assign (str
, i
);
4302 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4303 EXPECT ("function"));
4307 /* While "w" is a prefix of both components, the match function
4308 should still only be called once. */
4310 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4312 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4316 /* Same, with a "complicated" symbol. */
4318 static const char str
[] = Z_SYM_NAME
;
4319 size_t len
= strlen (str
);
4322 for (size_t i
= 1; i
< len
; i
++)
4324 lookup
.assign (str
, i
);
4325 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4326 EXPECT (Z_SYM_NAME
));
4330 /* In FULL mode, an incomplete symbol doesn't match. */
4332 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4336 /* A complete symbol with parameters matches any overload, since the
4337 index has no overload info. */
4339 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4340 EXPECT ("std::zfunction", "std::zfunction2"));
4341 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4342 EXPECT ("std::zfunction", "std::zfunction2"));
4343 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4344 EXPECT ("std::zfunction", "std::zfunction2"));
4347 /* Check that whitespace is ignored appropriately. A symbol with a
4348 template argument list. */
4350 static const char expected
[] = "ns::foo<int>";
4351 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4353 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4357 /* Check that whitespace is ignored appropriately. A symbol with a
4358 template argument list that includes a pointer. */
4360 static const char expected
[] = "ns::foo<char*>";
4361 /* Try both completion and non-completion modes. */
4362 static const bool completion_mode
[2] = {false, true};
4363 for (size_t i
= 0; i
< 2; i
++)
4365 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4366 completion_mode
[i
], EXPECT (expected
));
4367 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4368 completion_mode
[i
], EXPECT (expected
));
4370 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4371 completion_mode
[i
], EXPECT (expected
));
4372 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4373 completion_mode
[i
], EXPECT (expected
));
4378 /* Check method qualifiers are ignored. */
4379 static const char expected
[] = "ns::foo<char*>";
4380 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4381 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4382 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4383 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4384 CHECK_MATCH ("foo < char * > ( int ) const",
4385 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4386 CHECK_MATCH ("foo < char * > ( int ) &&",
4387 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4390 /* Test lookup names that don't match anything. */
4392 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4395 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4399 /* Some wild matching tests, exercising "(anonymous namespace)",
4400 which should not be confused with a parameter list. */
4402 static const char *syms
[] = {
4406 "A :: B :: C ( int )",
4411 for (const char *s
: syms
)
4413 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4414 EXPECT ("(anonymous namespace)::A::B::C"));
4419 static const char expected
[] = "ns2::tmpl<int>::foo2";
4420 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4422 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4426 SELF_CHECK (!any_mismatch
);
4435 test_mapped_index_find_name_component_bounds ();
4436 test_dw2_expand_symtabs_matching_symbol ();
4439 }} // namespace selftests::dw2_expand_symtabs_matching
4441 #endif /* GDB_SELF_TEST */
4443 /* If FILE_MATCHER is NULL or if PER_CU has
4444 dwarf2_per_cu_quick_data::MARK set (see
4445 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4446 EXPANSION_NOTIFY on it. */
4449 dw2_expand_symtabs_matching_one
4450 (struct dwarf2_per_cu_data
*per_cu
,
4451 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4452 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4454 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4456 bool symtab_was_null
4457 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4459 dw2_instantiate_symtab (per_cu
, false);
4461 if (expansion_notify
!= NULL
4463 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4464 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4468 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4469 matched, to expand corresponding CUs that were marked. IDX is the
4470 index of the symbol name that matched. */
4473 dw2_expand_marked_cus
4474 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
4475 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4476 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4479 offset_type
*vec
, vec_len
, vec_idx
;
4480 bool global_seen
= false;
4481 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4483 vec
= (offset_type
*) (index
.constant_pool
4484 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4485 vec_len
= MAYBE_SWAP (vec
[0]);
4486 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4488 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4489 /* This value is only valid for index versions >= 7. */
4490 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4491 gdb_index_symbol_kind symbol_kind
=
4492 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4493 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4494 /* Only check the symbol attributes if they're present.
4495 Indices prior to version 7 don't record them,
4496 and indices >= 7 may elide them for certain symbols
4497 (gold does this). */
4500 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4502 /* Work around gold/15646. */
4505 if (!is_static
&& global_seen
)
4511 /* Only check the symbol's kind if it has one. */
4516 case VARIABLES_DOMAIN
:
4517 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4520 case FUNCTIONS_DOMAIN
:
4521 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4525 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4528 case MODULES_DOMAIN
:
4529 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4537 /* Don't crash on bad data. */
4538 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
4539 + dwarf2_per_objfile
->all_type_units
.size ()))
4541 complaint (_(".gdb_index entry has bad CU index"
4543 objfile_name (dwarf2_per_objfile
->objfile
));
4547 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
4548 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4553 /* If FILE_MATCHER is non-NULL, set all the
4554 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4555 that match FILE_MATCHER. */
4558 dw_expand_symtabs_matching_file_matcher
4559 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4560 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4562 if (file_matcher
== NULL
)
4565 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
4567 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4569 NULL
, xcalloc
, xfree
));
4570 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4572 NULL
, xcalloc
, xfree
));
4574 /* The rule is CUs specify all the files, including those used by
4575 any TU, so there's no need to scan TUs here. */
4577 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4581 per_cu
->v
.quick
->mark
= 0;
4583 /* We only need to look at symtabs not already expanded. */
4584 if (per_cu
->v
.quick
->compunit_symtab
)
4587 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4588 if (file_data
== NULL
)
4591 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4593 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4595 per_cu
->v
.quick
->mark
= 1;
4599 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4601 const char *this_real_name
;
4603 if (file_matcher (file_data
->file_names
[j
], false))
4605 per_cu
->v
.quick
->mark
= 1;
4609 /* Before we invoke realpath, which can get expensive when many
4610 files are involved, do a quick comparison of the basenames. */
4611 if (!basenames_may_differ
4612 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4616 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4617 if (file_matcher (this_real_name
, false))
4619 per_cu
->v
.quick
->mark
= 1;
4624 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4625 ? visited_found
.get ()
4626 : visited_not_found
.get (),
4633 dw2_expand_symtabs_matching
4634 (struct objfile
*objfile
,
4635 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4636 const lookup_name_info
*lookup_name
,
4637 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4638 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4639 enum search_domain kind
)
4641 struct dwarf2_per_objfile
*dwarf2_per_objfile
4642 = get_dwarf2_per_objfile (objfile
);
4644 /* index_table is NULL if OBJF_READNOW. */
4645 if (!dwarf2_per_objfile
->index_table
)
4648 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
4650 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
4652 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4656 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4662 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4664 dw2_expand_symtabs_matching_symbol (index
, *lookup_name
,
4666 kind
, [&] (offset_type idx
)
4668 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
4669 expansion_notify
, kind
);
4674 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4677 static struct compunit_symtab
*
4678 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4683 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4684 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4687 if (cust
->includes
== NULL
)
4690 for (i
= 0; cust
->includes
[i
]; ++i
)
4692 struct compunit_symtab
*s
= cust
->includes
[i
];
4694 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4702 static struct compunit_symtab
*
4703 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4704 struct bound_minimal_symbol msymbol
,
4706 struct obj_section
*section
,
4709 struct dwarf2_per_cu_data
*data
;
4710 struct compunit_symtab
*result
;
4712 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
4715 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
4716 data
= (struct dwarf2_per_cu_data
*) addrmap_find
4717 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
4721 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4722 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4723 paddress (objfile
->arch (), pc
));
4726 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
4729 gdb_assert (result
!= NULL
);
4734 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4735 void *data
, int need_fullname
)
4737 struct dwarf2_per_objfile
*dwarf2_per_objfile
4738 = get_dwarf2_per_objfile (objfile
);
4740 if (!dwarf2_per_objfile
->filenames_cache
)
4742 dwarf2_per_objfile
->filenames_cache
.emplace ();
4744 htab_up
visited (htab_create_alloc (10,
4745 htab_hash_pointer
, htab_eq_pointer
,
4746 NULL
, xcalloc
, xfree
));
4748 /* The rule is CUs specify all the files, including those used
4749 by any TU, so there's no need to scan TUs here. We can
4750 ignore file names coming from already-expanded CUs. */
4752 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4754 if (per_cu
->v
.quick
->compunit_symtab
)
4756 void **slot
= htab_find_slot (visited
.get (),
4757 per_cu
->v
.quick
->file_names
,
4760 *slot
= per_cu
->v
.quick
->file_names
;
4764 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4766 /* We only need to look at symtabs not already expanded. */
4767 if (per_cu
->v
.quick
->compunit_symtab
)
4770 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4771 if (file_data
== NULL
)
4774 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4777 /* Already visited. */
4782 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4784 const char *filename
= file_data
->file_names
[j
];
4785 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
4790 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
4792 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4795 this_real_name
= gdb_realpath (filename
);
4796 (*fun
) (filename
, this_real_name
.get (), data
);
4801 dw2_has_symbols (struct objfile
*objfile
)
4806 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4809 dw2_find_last_source_symtab
,
4810 dw2_forget_cached_source_info
,
4811 dw2_map_symtabs_matching_filename
,
4816 dw2_expand_symtabs_for_function
,
4817 dw2_expand_all_symtabs
,
4818 dw2_expand_symtabs_with_fullname
,
4819 dw2_map_matching_symbols
,
4820 dw2_expand_symtabs_matching
,
4821 dw2_find_pc_sect_compunit_symtab
,
4823 dw2_map_symbol_filenames
4826 /* DWARF-5 debug_names reader. */
4828 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
4829 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
4831 /* A helper function that reads the .debug_names section in SECTION
4832 and fills in MAP. FILENAME is the name of the file containing the
4833 section; it is used for error reporting.
4835 Returns true if all went well, false otherwise. */
4838 read_debug_names_from_section (struct objfile
*objfile
,
4839 const char *filename
,
4840 struct dwarf2_section_info
*section
,
4841 mapped_debug_names
&map
)
4843 if (section
->empty ())
4846 /* Older elfutils strip versions could keep the section in the main
4847 executable while splitting it for the separate debug info file. */
4848 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
4851 section
->read (objfile
);
4853 map
.dwarf5_byte_order
= gdbarch_byte_order (objfile
->arch ());
4855 const gdb_byte
*addr
= section
->buffer
;
4857 bfd
*const abfd
= section
->get_bfd_owner ();
4859 unsigned int bytes_read
;
4860 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
4863 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
4864 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
4865 if (bytes_read
+ length
!= section
->size
)
4867 /* There may be multiple per-CU indices. */
4868 warning (_("Section .debug_names in %s length %s does not match "
4869 "section length %s, ignoring .debug_names."),
4870 filename
, plongest (bytes_read
+ length
),
4871 pulongest (section
->size
));
4875 /* The version number. */
4876 uint16_t version
= read_2_bytes (abfd
, addr
);
4880 warning (_("Section .debug_names in %s has unsupported version %d, "
4881 "ignoring .debug_names."),
4887 uint16_t padding
= read_2_bytes (abfd
, addr
);
4891 warning (_("Section .debug_names in %s has unsupported padding %d, "
4892 "ignoring .debug_names."),
4897 /* comp_unit_count - The number of CUs in the CU list. */
4898 map
.cu_count
= read_4_bytes (abfd
, addr
);
4901 /* local_type_unit_count - The number of TUs in the local TU
4903 map
.tu_count
= read_4_bytes (abfd
, addr
);
4906 /* foreign_type_unit_count - The number of TUs in the foreign TU
4908 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
4910 if (foreign_tu_count
!= 0)
4912 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
4913 "ignoring .debug_names."),
4914 filename
, static_cast<unsigned long> (foreign_tu_count
));
4918 /* bucket_count - The number of hash buckets in the hash lookup
4920 map
.bucket_count
= read_4_bytes (abfd
, addr
);
4923 /* name_count - The number of unique names in the index. */
4924 map
.name_count
= read_4_bytes (abfd
, addr
);
4927 /* abbrev_table_size - The size in bytes of the abbreviations
4929 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
4932 /* augmentation_string_size - The size in bytes of the augmentation
4933 string. This value is rounded up to a multiple of 4. */
4934 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
4936 map
.augmentation_is_gdb
= ((augmentation_string_size
4937 == sizeof (dwarf5_augmentation
))
4938 && memcmp (addr
, dwarf5_augmentation
,
4939 sizeof (dwarf5_augmentation
)) == 0);
4940 augmentation_string_size
+= (-augmentation_string_size
) & 3;
4941 addr
+= augmentation_string_size
;
4944 map
.cu_table_reordered
= addr
;
4945 addr
+= map
.cu_count
* map
.offset_size
;
4947 /* List of Local TUs */
4948 map
.tu_table_reordered
= addr
;
4949 addr
+= map
.tu_count
* map
.offset_size
;
4951 /* Hash Lookup Table */
4952 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
4953 addr
+= map
.bucket_count
* 4;
4954 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
4955 addr
+= map
.name_count
* 4;
4958 map
.name_table_string_offs_reordered
= addr
;
4959 addr
+= map
.name_count
* map
.offset_size
;
4960 map
.name_table_entry_offs_reordered
= addr
;
4961 addr
+= map
.name_count
* map
.offset_size
;
4963 const gdb_byte
*abbrev_table_start
= addr
;
4966 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4971 const auto insertpair
4972 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
4973 if (!insertpair
.second
)
4975 warning (_("Section .debug_names in %s has duplicate index %s, "
4976 "ignoring .debug_names."),
4977 filename
, pulongest (index_num
));
4980 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
4981 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4986 mapped_debug_names::index_val::attr attr
;
4987 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4989 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4991 if (attr
.form
== DW_FORM_implicit_const
)
4993 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
4997 if (attr
.dw_idx
== 0 && attr
.form
== 0)
4999 indexval
.attr_vec
.push_back (std::move (attr
));
5002 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5004 warning (_("Section .debug_names in %s has abbreviation_table "
5005 "of size %s vs. written as %u, ignoring .debug_names."),
5006 filename
, plongest (addr
- abbrev_table_start
),
5010 map
.entry_pool
= addr
;
5015 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5019 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5020 const mapped_debug_names
&map
,
5021 dwarf2_section_info
§ion
,
5024 sect_offset sect_off_prev
;
5025 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5027 sect_offset sect_off_next
;
5028 if (i
< map
.cu_count
)
5031 = (sect_offset
) (extract_unsigned_integer
5032 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5034 map
.dwarf5_byte_order
));
5037 sect_off_next
= (sect_offset
) section
.size
;
5040 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5041 dwarf2_per_cu_data
*per_cu
5042 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5043 sect_off_prev
, length
);
5044 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5046 sect_off_prev
= sect_off_next
;
5050 /* Read the CU list from the mapped index, and use it to create all
5051 the CU objects for this dwarf2_per_objfile. */
5054 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5055 const mapped_debug_names
&map
,
5056 const mapped_debug_names
&dwz_map
)
5058 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5059 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5061 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5062 dwarf2_per_objfile
->info
,
5063 false /* is_dwz */);
5065 if (dwz_map
.cu_count
== 0)
5068 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5069 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5073 /* Read .debug_names. If everything went ok, initialize the "quick"
5074 elements of all the CUs and return true. Otherwise, return false. */
5077 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5079 std::unique_ptr
<mapped_debug_names
> map
5080 (new mapped_debug_names (dwarf2_per_objfile
));
5081 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5082 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5084 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5085 &dwarf2_per_objfile
->debug_names
,
5089 /* Don't use the index if it's empty. */
5090 if (map
->name_count
== 0)
5093 /* If there is a .dwz file, read it so we can get its CU list as
5095 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5098 if (!read_debug_names_from_section (objfile
,
5099 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5100 &dwz
->debug_names
, dwz_map
))
5102 warning (_("could not read '.debug_names' section from %s; skipping"),
5103 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5108 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5110 if (map
->tu_count
!= 0)
5112 /* We can only handle a single .debug_types when we have an
5114 if (dwarf2_per_objfile
->types
.size () != 1)
5117 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
5119 create_signatured_type_table_from_debug_names
5120 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5123 create_addrmap_from_aranges (dwarf2_per_objfile
,
5124 &dwarf2_per_objfile
->debug_aranges
);
5126 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5127 dwarf2_per_objfile
->using_index
= 1;
5128 dwarf2_per_objfile
->quick_file_names_table
=
5129 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5134 /* Type used to manage iterating over all CUs looking for a symbol for
5137 class dw2_debug_names_iterator
5140 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5141 gdb::optional
<block_enum
> block_index
,
5144 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5145 m_addr (find_vec_in_debug_names (map
, name
))
5148 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5149 search_domain search
, uint32_t namei
)
5152 m_addr (find_vec_in_debug_names (map
, namei
))
5155 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5156 block_enum block_index
, domain_enum domain
,
5158 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5159 m_addr (find_vec_in_debug_names (map
, namei
))
5162 /* Return the next matching CU or NULL if there are no more. */
5163 dwarf2_per_cu_data
*next ();
5166 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5168 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5171 /* The internalized form of .debug_names. */
5172 const mapped_debug_names
&m_map
;
5174 /* If set, only look for symbols that match that block. Valid values are
5175 GLOBAL_BLOCK and STATIC_BLOCK. */
5176 const gdb::optional
<block_enum
> m_block_index
;
5178 /* The kind of symbol we're looking for. */
5179 const domain_enum m_domain
= UNDEF_DOMAIN
;
5180 const search_domain m_search
= ALL_DOMAIN
;
5182 /* The list of CUs from the index entry of the symbol, or NULL if
5184 const gdb_byte
*m_addr
;
5188 mapped_debug_names::namei_to_name (uint32_t namei
) const
5190 const ULONGEST namei_string_offs
5191 = extract_unsigned_integer ((name_table_string_offs_reordered
5192 + namei
* offset_size
),
5195 return read_indirect_string_at_offset (dwarf2_per_objfile
,
5199 /* Find a slot in .debug_names for the object named NAME. If NAME is
5200 found, return pointer to its pool data. If NAME cannot be found,
5204 dw2_debug_names_iterator::find_vec_in_debug_names
5205 (const mapped_debug_names
&map
, const char *name
)
5207 int (*cmp
) (const char *, const char *);
5209 gdb::unique_xmalloc_ptr
<char> without_params
;
5210 if (current_language
->la_language
== language_cplus
5211 || current_language
->la_language
== language_fortran
5212 || current_language
->la_language
== language_d
)
5214 /* NAME is already canonical. Drop any qualifiers as
5215 .debug_names does not contain any. */
5217 if (strchr (name
, '(') != NULL
)
5219 without_params
= cp_remove_params (name
);
5220 if (without_params
!= NULL
)
5221 name
= without_params
.get ();
5225 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5227 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5229 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5230 (map
.bucket_table_reordered
5231 + (full_hash
% map
.bucket_count
)), 4,
5232 map
.dwarf5_byte_order
);
5236 if (namei
>= map
.name_count
)
5238 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5240 namei
, map
.name_count
,
5241 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5247 const uint32_t namei_full_hash
5248 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5249 (map
.hash_table_reordered
+ namei
), 4,
5250 map
.dwarf5_byte_order
);
5251 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5254 if (full_hash
== namei_full_hash
)
5256 const char *const namei_string
= map
.namei_to_name (namei
);
5258 #if 0 /* An expensive sanity check. */
5259 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5261 complaint (_("Wrong .debug_names hash for string at index %u "
5263 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5268 if (cmp (namei_string
, name
) == 0)
5270 const ULONGEST namei_entry_offs
5271 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5272 + namei
* map
.offset_size
),
5273 map
.offset_size
, map
.dwarf5_byte_order
);
5274 return map
.entry_pool
+ namei_entry_offs
;
5279 if (namei
>= map
.name_count
)
5285 dw2_debug_names_iterator::find_vec_in_debug_names
5286 (const mapped_debug_names
&map
, uint32_t namei
)
5288 if (namei
>= map
.name_count
)
5290 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5292 namei
, map
.name_count
,
5293 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5297 const ULONGEST namei_entry_offs
5298 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5299 + namei
* map
.offset_size
),
5300 map
.offset_size
, map
.dwarf5_byte_order
);
5301 return map
.entry_pool
+ namei_entry_offs
;
5304 /* See dw2_debug_names_iterator. */
5306 dwarf2_per_cu_data
*
5307 dw2_debug_names_iterator::next ()
5312 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5313 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5314 bfd
*const abfd
= objfile
->obfd
;
5318 unsigned int bytes_read
;
5319 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5320 m_addr
+= bytes_read
;
5324 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5325 if (indexval_it
== m_map
.abbrev_map
.cend ())
5327 complaint (_("Wrong .debug_names undefined abbrev code %s "
5329 pulongest (abbrev
), objfile_name (objfile
));
5332 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5333 enum class symbol_linkage
{
5337 } symbol_linkage_
= symbol_linkage::unknown
;
5338 dwarf2_per_cu_data
*per_cu
= NULL
;
5339 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5344 case DW_FORM_implicit_const
:
5345 ull
= attr
.implicit_const
;
5347 case DW_FORM_flag_present
:
5351 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5352 m_addr
+= bytes_read
;
5355 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5356 dwarf_form_name (attr
.form
),
5357 objfile_name (objfile
));
5360 switch (attr
.dw_idx
)
5362 case DW_IDX_compile_unit
:
5363 /* Don't crash on bad data. */
5364 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5366 complaint (_(".debug_names entry has bad CU index %s"
5369 objfile_name (dwarf2_per_objfile
->objfile
));
5372 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5374 case DW_IDX_type_unit
:
5375 /* Don't crash on bad data. */
5376 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5378 complaint (_(".debug_names entry has bad TU index %s"
5381 objfile_name (dwarf2_per_objfile
->objfile
));
5384 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5386 case DW_IDX_GNU_internal
:
5387 if (!m_map
.augmentation_is_gdb
)
5389 symbol_linkage_
= symbol_linkage::static_
;
5391 case DW_IDX_GNU_external
:
5392 if (!m_map
.augmentation_is_gdb
)
5394 symbol_linkage_
= symbol_linkage::extern_
;
5399 /* Skip if already read in. */
5400 if (per_cu
->v
.quick
->compunit_symtab
)
5403 /* Check static vs global. */
5404 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5406 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5407 const bool symbol_is_static
=
5408 symbol_linkage_
== symbol_linkage::static_
;
5409 if (want_static
!= symbol_is_static
)
5413 /* Match dw2_symtab_iter_next, symbol_kind
5414 and debug_names::psymbol_tag. */
5418 switch (indexval
.dwarf_tag
)
5420 case DW_TAG_variable
:
5421 case DW_TAG_subprogram
:
5422 /* Some types are also in VAR_DOMAIN. */
5423 case DW_TAG_typedef
:
5424 case DW_TAG_structure_type
:
5431 switch (indexval
.dwarf_tag
)
5433 case DW_TAG_typedef
:
5434 case DW_TAG_structure_type
:
5441 switch (indexval
.dwarf_tag
)
5444 case DW_TAG_variable
:
5451 switch (indexval
.dwarf_tag
)
5463 /* Match dw2_expand_symtabs_matching, symbol_kind and
5464 debug_names::psymbol_tag. */
5467 case VARIABLES_DOMAIN
:
5468 switch (indexval
.dwarf_tag
)
5470 case DW_TAG_variable
:
5476 case FUNCTIONS_DOMAIN
:
5477 switch (indexval
.dwarf_tag
)
5479 case DW_TAG_subprogram
:
5486 switch (indexval
.dwarf_tag
)
5488 case DW_TAG_typedef
:
5489 case DW_TAG_structure_type
:
5495 case MODULES_DOMAIN
:
5496 switch (indexval
.dwarf_tag
)
5510 static struct compunit_symtab
*
5511 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5512 const char *name
, domain_enum domain
)
5514 struct dwarf2_per_objfile
*dwarf2_per_objfile
5515 = get_dwarf2_per_objfile (objfile
);
5517 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
5520 /* index is NULL if OBJF_READNOW. */
5523 const auto &map
= *mapp
;
5525 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
5527 struct compunit_symtab
*stab_best
= NULL
;
5528 struct dwarf2_per_cu_data
*per_cu
;
5529 while ((per_cu
= iter
.next ()) != NULL
)
5531 struct symbol
*sym
, *with_opaque
= NULL
;
5532 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
5533 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5534 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5536 sym
= block_find_symbol (block
, name
, domain
,
5537 block_find_non_opaque_type_preferred
,
5540 /* Some caution must be observed with overloaded functions and
5541 methods, since the index will not contain any overload
5542 information (but NAME might contain it). */
5545 && strcmp_iw (sym
->search_name (), name
) == 0)
5547 if (with_opaque
!= NULL
5548 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5551 /* Keep looking through other CUs. */
5557 /* This dumps minimal information about .debug_names. It is called
5558 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5559 uses this to verify that .debug_names has been loaded. */
5562 dw2_debug_names_dump (struct objfile
*objfile
)
5564 struct dwarf2_per_objfile
*dwarf2_per_objfile
5565 = get_dwarf2_per_objfile (objfile
);
5567 gdb_assert (dwarf2_per_objfile
->using_index
);
5568 printf_filtered (".debug_names:");
5569 if (dwarf2_per_objfile
->debug_names_table
)
5570 printf_filtered (" exists\n");
5572 printf_filtered (" faked for \"readnow\"\n");
5573 printf_filtered ("\n");
5577 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5578 const char *func_name
)
5580 struct dwarf2_per_objfile
*dwarf2_per_objfile
5581 = get_dwarf2_per_objfile (objfile
);
5583 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
5584 if (dwarf2_per_objfile
->debug_names_table
)
5586 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5588 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
5590 struct dwarf2_per_cu_data
*per_cu
;
5591 while ((per_cu
= iter
.next ()) != NULL
)
5592 dw2_instantiate_symtab (per_cu
, false);
5597 dw2_debug_names_map_matching_symbols
5598 (struct objfile
*objfile
,
5599 const lookup_name_info
&name
, domain_enum domain
,
5601 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5602 symbol_compare_ftype
*ordered_compare
)
5604 struct dwarf2_per_objfile
*dwarf2_per_objfile
5605 = get_dwarf2_per_objfile (objfile
);
5607 /* debug_names_table is NULL if OBJF_READNOW. */
5608 if (!dwarf2_per_objfile
->debug_names_table
)
5611 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5612 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5614 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5615 auto matcher
= [&] (const char *symname
)
5617 if (ordered_compare
== nullptr)
5619 return ordered_compare (symname
, match_name
) == 0;
5622 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5623 [&] (offset_type namei
)
5625 /* The name was matched, now expand corresponding CUs that were
5627 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
5629 struct dwarf2_per_cu_data
*per_cu
;
5630 while ((per_cu
= iter
.next ()) != NULL
)
5631 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
5635 /* It's a shame we couldn't do this inside the
5636 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5637 that have already been expanded. Instead, this loop matches what
5638 the psymtab code does. */
5639 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5641 struct compunit_symtab
*cust
= per_cu
->v
.quick
->compunit_symtab
;
5642 if (cust
!= nullptr)
5644 const struct block
*block
5645 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
5646 if (!iterate_over_symbols_terminated (block
, name
,
5654 dw2_debug_names_expand_symtabs_matching
5655 (struct objfile
*objfile
,
5656 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5657 const lookup_name_info
*lookup_name
,
5658 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5659 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5660 enum search_domain kind
)
5662 struct dwarf2_per_objfile
*dwarf2_per_objfile
5663 = get_dwarf2_per_objfile (objfile
);
5665 /* debug_names_table is NULL if OBJF_READNOW. */
5666 if (!dwarf2_per_objfile
->debug_names_table
)
5669 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5671 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
5673 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5677 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5683 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5685 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
5687 kind
, [&] (offset_type namei
)
5689 /* The name was matched, now expand corresponding CUs that were
5691 dw2_debug_names_iterator
iter (map
, kind
, namei
);
5693 struct dwarf2_per_cu_data
*per_cu
;
5694 while ((per_cu
= iter
.next ()) != NULL
)
5695 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5701 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5704 dw2_find_last_source_symtab
,
5705 dw2_forget_cached_source_info
,
5706 dw2_map_symtabs_matching_filename
,
5707 dw2_debug_names_lookup_symbol
,
5710 dw2_debug_names_dump
,
5711 dw2_debug_names_expand_symtabs_for_function
,
5712 dw2_expand_all_symtabs
,
5713 dw2_expand_symtabs_with_fullname
,
5714 dw2_debug_names_map_matching_symbols
,
5715 dw2_debug_names_expand_symtabs_matching
,
5716 dw2_find_pc_sect_compunit_symtab
,
5718 dw2_map_symbol_filenames
5721 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5722 to either a dwarf2_per_objfile or dwz_file object. */
5724 template <typename T
>
5725 static gdb::array_view
<const gdb_byte
>
5726 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5728 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5730 if (section
->empty ())
5733 /* Older elfutils strip versions could keep the section in the main
5734 executable while splitting it for the separate debug info file. */
5735 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5738 section
->read (obj
);
5740 /* dwarf2_section_info::size is a bfd_size_type, while
5741 gdb::array_view works with size_t. On 32-bit hosts, with
5742 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5743 is 32-bit. So we need an explicit narrowing conversion here.
5744 This is fine, because it's impossible to allocate or mmap an
5745 array/buffer larger than what size_t can represent. */
5746 return gdb::make_array_view (section
->buffer
, section
->size
);
5749 /* Lookup the index cache for the contents of the index associated to
5752 static gdb::array_view
<const gdb_byte
>
5753 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
5755 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5756 if (build_id
== nullptr)
5759 return global_index_cache
.lookup_gdb_index (build_id
,
5760 &dwarf2_obj
->index_cache_res
);
5763 /* Same as the above, but for DWZ. */
5765 static gdb::array_view
<const gdb_byte
>
5766 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5768 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5769 if (build_id
== nullptr)
5772 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5775 /* See symfile.h. */
5778 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
5780 struct dwarf2_per_objfile
*dwarf2_per_objfile
5781 = get_dwarf2_per_objfile (objfile
);
5783 /* If we're about to read full symbols, don't bother with the
5784 indices. In this case we also don't care if some other debug
5785 format is making psymtabs, because they are all about to be
5787 if ((objfile
->flags
& OBJF_READNOW
))
5789 dwarf2_per_objfile
->using_index
= 1;
5790 create_all_comp_units (dwarf2_per_objfile
);
5791 create_all_type_units (dwarf2_per_objfile
);
5792 dwarf2_per_objfile
->quick_file_names_table
5793 = create_quick_file_names_table
5794 (dwarf2_per_objfile
->all_comp_units
.size ());
5796 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
5797 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
5799 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
5801 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5802 struct dwarf2_per_cu_quick_data
);
5805 /* Return 1 so that gdb sees the "quick" functions. However,
5806 these functions will be no-ops because we will have expanded
5808 *index_kind
= dw_index_kind::GDB_INDEX
;
5812 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
5814 *index_kind
= dw_index_kind::DEBUG_NAMES
;
5818 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5819 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
5820 get_gdb_index_contents_from_section
<dwz_file
>))
5822 *index_kind
= dw_index_kind::GDB_INDEX
;
5826 /* ... otherwise, try to find the index in the index cache. */
5827 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5828 get_gdb_index_contents_from_cache
,
5829 get_gdb_index_contents_from_cache_dwz
))
5831 global_index_cache
.hit ();
5832 *index_kind
= dw_index_kind::GDB_INDEX
;
5836 global_index_cache
.miss ();
5842 /* Build a partial symbol table. */
5845 dwarf2_build_psymtabs (struct objfile
*objfile
)
5847 struct dwarf2_per_objfile
*dwarf2_per_objfile
5848 = get_dwarf2_per_objfile (objfile
);
5850 init_psymbol_list (objfile
, 1024);
5854 /* This isn't really ideal: all the data we allocate on the
5855 objfile's obstack is still uselessly kept around. However,
5856 freeing it seems unsafe. */
5857 psymtab_discarder
psymtabs (objfile
);
5858 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
5861 /* (maybe) store an index in the cache. */
5862 global_index_cache
.store (dwarf2_per_objfile
);
5864 catch (const gdb_exception_error
&except
)
5866 exception_print (gdb_stderr
, except
);
5870 /* Find the base address of the compilation unit for range lists and
5871 location lists. It will normally be specified by DW_AT_low_pc.
5872 In DWARF-3 draft 4, the base address could be overridden by
5873 DW_AT_entry_pc. It's been removed, but GCC still uses this for
5874 compilation units with discontinuous ranges. */
5877 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
5879 struct attribute
*attr
;
5881 cu
->base_address
.reset ();
5883 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
5884 if (attr
!= nullptr)
5885 cu
->base_address
= attr
->value_as_address ();
5888 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5889 if (attr
!= nullptr)
5890 cu
->base_address
= attr
->value_as_address ();
5894 /* Helper function that returns the proper abbrev section for
5897 static struct dwarf2_section_info
*
5898 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
5900 struct dwarf2_section_info
*abbrev
;
5901 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
5903 if (this_cu
->is_dwz
)
5904 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
5906 abbrev
= &dwarf2_per_objfile
->abbrev
;
5911 /* Fetch the abbreviation table offset from a comp or type unit header. */
5914 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5915 struct dwarf2_section_info
*section
,
5916 sect_offset sect_off
)
5918 bfd
*abfd
= section
->get_bfd_owner ();
5919 const gdb_byte
*info_ptr
;
5920 unsigned int initial_length_size
, offset_size
;
5923 section
->read (dwarf2_per_objfile
->objfile
);
5924 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
5925 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5926 offset_size
= initial_length_size
== 4 ? 4 : 8;
5927 info_ptr
+= initial_length_size
;
5929 version
= read_2_bytes (abfd
, info_ptr
);
5933 /* Skip unit type and address size. */
5937 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
5940 /* A partial symtab that is used only for include files. */
5941 struct dwarf2_include_psymtab
: public partial_symtab
5943 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
5944 : partial_symtab (filename
, objfile
)
5948 void read_symtab (struct objfile
*objfile
) override
5950 /* It's an include file, no symbols to read for it.
5951 Everything is in the includer symtab. */
5953 /* The expansion of a dwarf2_include_psymtab is just a trigger for
5954 expansion of the includer psymtab. We use the dependencies[0] field to
5955 model the includer. But if we go the regular route of calling
5956 expand_psymtab here, and having expand_psymtab call expand_dependencies
5957 to expand the includer, we'll only use expand_psymtab on the includer
5958 (making it a non-toplevel psymtab), while if we expand the includer via
5959 another path, we'll use read_symtab (making it a toplevel psymtab).
5960 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
5961 psymtab, and trigger read_symtab on the includer here directly. */
5962 includer ()->read_symtab (objfile
);
5965 void expand_psymtab (struct objfile
*objfile
) override
5967 /* This is not called by read_symtab, and should not be called by any
5968 expand_dependencies. */
5972 bool readin_p () const override
5974 return includer ()->readin_p ();
5977 struct compunit_symtab
*get_compunit_symtab () const override
5983 partial_symtab
*includer () const
5985 /* An include psymtab has exactly one dependency: the psymtab that
5987 gdb_assert (this->number_of_dependencies
== 1);
5988 return this->dependencies
[0];
5992 /* Allocate a new partial symtab for file named NAME and mark this new
5993 partial symtab as being an include of PST. */
5996 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
5997 struct objfile
*objfile
)
5999 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
6001 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6003 /* It shares objfile->objfile_obstack. */
6004 subpst
->dirname
= pst
->dirname
;
6007 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6008 subpst
->dependencies
[0] = pst
;
6009 subpst
->number_of_dependencies
= 1;
6012 /* Read the Line Number Program data and extract the list of files
6013 included by the source file represented by PST. Build an include
6014 partial symtab for each of these included files. */
6017 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6018 struct die_info
*die
,
6019 dwarf2_psymtab
*pst
)
6022 struct attribute
*attr
;
6024 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6025 if (attr
!= nullptr)
6026 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6028 return; /* No linetable, so no includes. */
6030 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6031 that we pass in the raw text_low here; that is ok because we're
6032 only decoding the line table to make include partial symtabs, and
6033 so the addresses aren't really used. */
6034 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6035 pst
->raw_text_low (), 1);
6039 hash_signatured_type (const void *item
)
6041 const struct signatured_type
*sig_type
6042 = (const struct signatured_type
*) item
;
6044 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6045 return sig_type
->signature
;
6049 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6051 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6052 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6054 return lhs
->signature
== rhs
->signature
;
6057 /* Allocate a hash table for signatured types. */
6060 allocate_signatured_type_table ()
6062 return htab_up (htab_create_alloc (41,
6063 hash_signatured_type
,
6065 NULL
, xcalloc
, xfree
));
6068 /* A helper function to add a signatured type CU to a table. */
6071 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6073 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6074 std::vector
<signatured_type
*> *all_type_units
6075 = (std::vector
<signatured_type
*> *) datum
;
6077 all_type_units
->push_back (sigt
);
6082 /* A helper for create_debug_types_hash_table. Read types from SECTION
6083 and fill them into TYPES_HTAB. It will process only type units,
6084 therefore DW_UT_type. */
6087 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6088 struct dwo_file
*dwo_file
,
6089 dwarf2_section_info
*section
, htab_up
&types_htab
,
6090 rcuh_kind section_kind
)
6092 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6093 struct dwarf2_section_info
*abbrev_section
;
6095 const gdb_byte
*info_ptr
, *end_ptr
;
6097 abbrev_section
= (dwo_file
!= NULL
6098 ? &dwo_file
->sections
.abbrev
6099 : &dwarf2_per_objfile
->abbrev
);
6101 if (dwarf_read_debug
)
6102 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6103 section
->get_name (),
6104 abbrev_section
->get_file_name ());
6106 section
->read (objfile
);
6107 info_ptr
= section
->buffer
;
6109 if (info_ptr
== NULL
)
6112 /* We can't set abfd until now because the section may be empty or
6113 not present, in which case the bfd is unknown. */
6114 abfd
= section
->get_bfd_owner ();
6116 /* We don't use cutu_reader here because we don't need to read
6117 any dies: the signature is in the header. */
6119 end_ptr
= info_ptr
+ section
->size
;
6120 while (info_ptr
< end_ptr
)
6122 struct signatured_type
*sig_type
;
6123 struct dwo_unit
*dwo_tu
;
6125 const gdb_byte
*ptr
= info_ptr
;
6126 struct comp_unit_head header
;
6127 unsigned int length
;
6129 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6131 /* Initialize it due to a false compiler warning. */
6132 header
.signature
= -1;
6133 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6135 /* We need to read the type's signature in order to build the hash
6136 table, but we don't need anything else just yet. */
6138 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6139 abbrev_section
, ptr
, section_kind
);
6141 length
= header
.get_length ();
6143 /* Skip dummy type units. */
6144 if (ptr
>= info_ptr
+ length
6145 || peek_abbrev_code (abfd
, ptr
) == 0
6146 || header
.unit_type
!= DW_UT_type
)
6152 if (types_htab
== NULL
)
6155 types_htab
= allocate_dwo_unit_table ();
6157 types_htab
= allocate_signatured_type_table ();
6163 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6165 dwo_tu
->dwo_file
= dwo_file
;
6166 dwo_tu
->signature
= header
.signature
;
6167 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6168 dwo_tu
->section
= section
;
6169 dwo_tu
->sect_off
= sect_off
;
6170 dwo_tu
->length
= length
;
6174 /* N.B.: type_offset is not usable if this type uses a DWO file.
6175 The real type_offset is in the DWO file. */
6177 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6178 struct signatured_type
);
6179 sig_type
->signature
= header
.signature
;
6180 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6181 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6182 sig_type
->per_cu
.is_debug_types
= 1;
6183 sig_type
->per_cu
.section
= section
;
6184 sig_type
->per_cu
.sect_off
= sect_off
;
6185 sig_type
->per_cu
.length
= length
;
6188 slot
= htab_find_slot (types_htab
.get (),
6189 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6191 gdb_assert (slot
!= NULL
);
6194 sect_offset dup_sect_off
;
6198 const struct dwo_unit
*dup_tu
6199 = (const struct dwo_unit
*) *slot
;
6201 dup_sect_off
= dup_tu
->sect_off
;
6205 const struct signatured_type
*dup_tu
6206 = (const struct signatured_type
*) *slot
;
6208 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6211 complaint (_("debug type entry at offset %s is duplicate to"
6212 " the entry at offset %s, signature %s"),
6213 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6214 hex_string (header
.signature
));
6216 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6218 if (dwarf_read_debug
> 1)
6219 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6220 sect_offset_str (sect_off
),
6221 hex_string (header
.signature
));
6227 /* Create the hash table of all entries in the .debug_types
6228 (or .debug_types.dwo) section(s).
6229 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6230 otherwise it is NULL.
6232 The result is a pointer to the hash table or NULL if there are no types.
6234 Note: This function processes DWO files only, not DWP files. */
6237 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6238 struct dwo_file
*dwo_file
,
6239 gdb::array_view
<dwarf2_section_info
> type_sections
,
6240 htab_up
&types_htab
)
6242 for (dwarf2_section_info
§ion
: type_sections
)
6243 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6244 types_htab
, rcuh_kind::TYPE
);
6247 /* Create the hash table of all entries in the .debug_types section,
6248 and initialize all_type_units.
6249 The result is zero if there is an error (e.g. missing .debug_types section),
6250 otherwise non-zero. */
6253 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6257 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6258 &dwarf2_per_objfile
->info
, types_htab
,
6259 rcuh_kind::COMPILE
);
6260 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6261 dwarf2_per_objfile
->types
, types_htab
);
6262 if (types_htab
== NULL
)
6264 dwarf2_per_objfile
->signatured_types
= NULL
;
6268 dwarf2_per_objfile
->signatured_types
= std::move (types_htab
);
6270 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6271 dwarf2_per_objfile
->all_type_units
.reserve
6272 (htab_elements (dwarf2_per_objfile
->signatured_types
.get ()));
6274 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
.get (),
6275 add_signatured_type_cu_to_table
,
6276 &dwarf2_per_objfile
->all_type_units
);
6281 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6282 If SLOT is non-NULL, it is the entry to use in the hash table.
6283 Otherwise we find one. */
6285 static struct signatured_type
*
6286 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6289 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6291 if (dwarf2_per_objfile
->all_type_units
.size ()
6292 == dwarf2_per_objfile
->all_type_units
.capacity ())
6293 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6295 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6296 struct signatured_type
);
6298 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6299 sig_type
->signature
= sig
;
6300 sig_type
->per_cu
.is_debug_types
= 1;
6301 if (dwarf2_per_objfile
->using_index
)
6303 sig_type
->per_cu
.v
.quick
=
6304 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6305 struct dwarf2_per_cu_quick_data
);
6310 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6313 gdb_assert (*slot
== NULL
);
6315 /* The rest of sig_type must be filled in by the caller. */
6319 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6320 Fill in SIG_ENTRY with DWO_ENTRY. */
6323 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6324 struct signatured_type
*sig_entry
,
6325 struct dwo_unit
*dwo_entry
)
6327 /* Make sure we're not clobbering something we don't expect to. */
6328 gdb_assert (! sig_entry
->per_cu
.queued
);
6329 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6330 if (dwarf2_per_objfile
->using_index
)
6332 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6333 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6336 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6337 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6338 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6339 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6340 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6342 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6343 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6344 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6345 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6346 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6347 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6348 sig_entry
->dwo_unit
= dwo_entry
;
6351 /* Subroutine of lookup_signatured_type.
6352 If we haven't read the TU yet, create the signatured_type data structure
6353 for a TU to be read in directly from a DWO file, bypassing the stub.
6354 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6355 using .gdb_index, then when reading a CU we want to stay in the DWO file
6356 containing that CU. Otherwise we could end up reading several other DWO
6357 files (due to comdat folding) to process the transitive closure of all the
6358 mentioned TUs, and that can be slow. The current DWO file will have every
6359 type signature that it needs.
6360 We only do this for .gdb_index because in the psymtab case we already have
6361 to read all the DWOs to build the type unit groups. */
6363 static struct signatured_type
*
6364 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6366 struct dwarf2_per_objfile
*dwarf2_per_objfile
6367 = cu
->per_cu
->dwarf2_per_objfile
;
6368 struct dwo_file
*dwo_file
;
6369 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6370 struct signatured_type find_sig_entry
, *sig_entry
;
6373 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6375 /* If TU skeletons have been removed then we may not have read in any
6377 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6378 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6380 /* We only ever need to read in one copy of a signatured type.
6381 Use the global signatured_types array to do our own comdat-folding
6382 of types. If this is the first time we're reading this TU, and
6383 the TU has an entry in .gdb_index, replace the recorded data from
6384 .gdb_index with this TU. */
6386 find_sig_entry
.signature
= sig
;
6387 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6388 &find_sig_entry
, INSERT
);
6389 sig_entry
= (struct signatured_type
*) *slot
;
6391 /* We can get here with the TU already read, *or* in the process of being
6392 read. Don't reassign the global entry to point to this DWO if that's
6393 the case. Also note that if the TU is already being read, it may not
6394 have come from a DWO, the program may be a mix of Fission-compiled
6395 code and non-Fission-compiled code. */
6397 /* Have we already tried to read this TU?
6398 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6399 needn't exist in the global table yet). */
6400 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6403 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6404 dwo_unit of the TU itself. */
6405 dwo_file
= cu
->dwo_unit
->dwo_file
;
6407 /* Ok, this is the first time we're reading this TU. */
6408 if (dwo_file
->tus
== NULL
)
6410 find_dwo_entry
.signature
= sig
;
6411 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6413 if (dwo_entry
== NULL
)
6416 /* If the global table doesn't have an entry for this TU, add one. */
6417 if (sig_entry
== NULL
)
6418 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6420 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6421 sig_entry
->per_cu
.tu_read
= 1;
6425 /* Subroutine of lookup_signatured_type.
6426 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6427 then try the DWP file. If the TU stub (skeleton) has been removed then
6428 it won't be in .gdb_index. */
6430 static struct signatured_type
*
6431 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6433 struct dwarf2_per_objfile
*dwarf2_per_objfile
6434 = cu
->per_cu
->dwarf2_per_objfile
;
6435 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6436 struct dwo_unit
*dwo_entry
;
6437 struct signatured_type find_sig_entry
, *sig_entry
;
6440 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6441 gdb_assert (dwp_file
!= NULL
);
6443 /* If TU skeletons have been removed then we may not have read in any
6445 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6446 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6448 find_sig_entry
.signature
= sig
;
6449 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6450 &find_sig_entry
, INSERT
);
6451 sig_entry
= (struct signatured_type
*) *slot
;
6453 /* Have we already tried to read this TU?
6454 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6455 needn't exist in the global table yet). */
6456 if (sig_entry
!= NULL
)
6459 if (dwp_file
->tus
== NULL
)
6461 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6462 sig
, 1 /* is_debug_types */);
6463 if (dwo_entry
== NULL
)
6466 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6467 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6472 /* Lookup a signature based type for DW_FORM_ref_sig8.
6473 Returns NULL if signature SIG is not present in the table.
6474 It is up to the caller to complain about this. */
6476 static struct signatured_type
*
6477 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6479 struct dwarf2_per_objfile
*dwarf2_per_objfile
6480 = cu
->per_cu
->dwarf2_per_objfile
;
6483 && dwarf2_per_objfile
->using_index
)
6485 /* We're in a DWO/DWP file, and we're using .gdb_index.
6486 These cases require special processing. */
6487 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
6488 return lookup_dwo_signatured_type (cu
, sig
);
6490 return lookup_dwp_signatured_type (cu
, sig
);
6494 struct signatured_type find_entry
, *entry
;
6496 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6498 find_entry
.signature
= sig
;
6499 entry
= ((struct signatured_type
*)
6500 htab_find (dwarf2_per_objfile
->signatured_types
.get (),
6506 /* Low level DIE reading support. */
6508 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6511 init_cu_die_reader (struct die_reader_specs
*reader
,
6512 struct dwarf2_cu
*cu
,
6513 struct dwarf2_section_info
*section
,
6514 struct dwo_file
*dwo_file
,
6515 struct abbrev_table
*abbrev_table
)
6517 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6518 reader
->abfd
= section
->get_bfd_owner ();
6520 reader
->dwo_file
= dwo_file
;
6521 reader
->die_section
= section
;
6522 reader
->buffer
= section
->buffer
;
6523 reader
->buffer_end
= section
->buffer
+ section
->size
;
6524 reader
->abbrev_table
= abbrev_table
;
6527 /* Subroutine of cutu_reader to simplify it.
6528 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6529 There's just a lot of work to do, and cutu_reader is big enough
6532 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6533 from it to the DIE in the DWO. If NULL we are skipping the stub.
6534 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6535 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6536 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6537 STUB_COMP_DIR may be non-NULL.
6538 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6539 are filled in with the info of the DIE from the DWO file.
6540 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6541 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6542 kept around for at least as long as *RESULT_READER.
6544 The result is non-zero if a valid (non-dummy) DIE was found. */
6547 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
6548 struct dwo_unit
*dwo_unit
,
6549 struct die_info
*stub_comp_unit_die
,
6550 const char *stub_comp_dir
,
6551 struct die_reader_specs
*result_reader
,
6552 const gdb_byte
**result_info_ptr
,
6553 struct die_info
**result_comp_unit_die
,
6554 abbrev_table_up
*result_dwo_abbrev_table
)
6556 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6557 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6558 struct dwarf2_cu
*cu
= this_cu
->cu
;
6560 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6561 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6562 int i
,num_extra_attrs
;
6563 struct dwarf2_section_info
*dwo_abbrev_section
;
6564 struct die_info
*comp_unit_die
;
6566 /* At most one of these may be provided. */
6567 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6569 /* These attributes aren't processed until later:
6570 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6571 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6572 referenced later. However, these attributes are found in the stub
6573 which we won't have later. In order to not impose this complication
6574 on the rest of the code, we read them here and copy them to the
6583 if (stub_comp_unit_die
!= NULL
)
6585 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6587 if (! this_cu
->is_debug_types
)
6588 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6589 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6590 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6591 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6592 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6594 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6596 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6597 here (if needed). We need the value before we can process
6599 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6601 else if (stub_comp_dir
!= NULL
)
6603 /* Reconstruct the comp_dir attribute to simplify the code below. */
6604 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6605 comp_dir
->name
= DW_AT_comp_dir
;
6606 comp_dir
->form
= DW_FORM_string
;
6607 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6608 DW_STRING (comp_dir
) = stub_comp_dir
;
6611 /* Set up for reading the DWO CU/TU. */
6612 cu
->dwo_unit
= dwo_unit
;
6613 dwarf2_section_info
*section
= dwo_unit
->section
;
6614 section
->read (objfile
);
6615 abfd
= section
->get_bfd_owner ();
6616 begin_info_ptr
= info_ptr
= (section
->buffer
6617 + to_underlying (dwo_unit
->sect_off
));
6618 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6620 if (this_cu
->is_debug_types
)
6622 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
6624 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6625 &cu
->header
, section
,
6627 info_ptr
, rcuh_kind::TYPE
);
6628 /* This is not an assert because it can be caused by bad debug info. */
6629 if (sig_type
->signature
!= cu
->header
.signature
)
6631 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6632 " TU at offset %s [in module %s]"),
6633 hex_string (sig_type
->signature
),
6634 hex_string (cu
->header
.signature
),
6635 sect_offset_str (dwo_unit
->sect_off
),
6636 bfd_get_filename (abfd
));
6638 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6639 /* For DWOs coming from DWP files, we don't know the CU length
6640 nor the type's offset in the TU until now. */
6641 dwo_unit
->length
= cu
->header
.get_length ();
6642 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6644 /* Establish the type offset that can be used to lookup the type.
6645 For DWO files, we don't know it until now. */
6646 sig_type
->type_offset_in_section
6647 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6651 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6652 &cu
->header
, section
,
6654 info_ptr
, rcuh_kind::COMPILE
);
6655 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6656 /* For DWOs coming from DWP files, we don't know the CU length
6658 dwo_unit
->length
= cu
->header
.get_length ();
6661 *result_dwo_abbrev_table
6662 = abbrev_table::read (objfile
, dwo_abbrev_section
,
6663 cu
->header
.abbrev_sect_off
);
6664 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
6665 result_dwo_abbrev_table
->get ());
6667 /* Read in the die, but leave space to copy over the attributes
6668 from the stub. This has the benefit of simplifying the rest of
6669 the code - all the work to maintain the illusion of a single
6670 DW_TAG_{compile,type}_unit DIE is done here. */
6671 num_extra_attrs
= ((stmt_list
!= NULL
)
6675 + (comp_dir
!= NULL
));
6676 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6679 /* Copy over the attributes from the stub to the DIE we just read in. */
6680 comp_unit_die
= *result_comp_unit_die
;
6681 i
= comp_unit_die
->num_attrs
;
6682 if (stmt_list
!= NULL
)
6683 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6685 comp_unit_die
->attrs
[i
++] = *low_pc
;
6686 if (high_pc
!= NULL
)
6687 comp_unit_die
->attrs
[i
++] = *high_pc
;
6689 comp_unit_die
->attrs
[i
++] = *ranges
;
6690 if (comp_dir
!= NULL
)
6691 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6692 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6694 if (dwarf_die_debug
)
6696 fprintf_unfiltered (gdb_stdlog
,
6697 "Read die from %s@0x%x of %s:\n",
6698 section
->get_name (),
6699 (unsigned) (begin_info_ptr
- section
->buffer
),
6700 bfd_get_filename (abfd
));
6701 dump_die (comp_unit_die
, dwarf_die_debug
);
6704 /* Skip dummy compilation units. */
6705 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6706 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6709 *result_info_ptr
= info_ptr
;
6713 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
6714 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
6715 signature is part of the header. */
6716 static gdb::optional
<ULONGEST
>
6717 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
6719 if (cu
->header
.version
>= 5)
6720 return cu
->header
.signature
;
6721 struct attribute
*attr
;
6722 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6723 if (attr
== nullptr)
6724 return gdb::optional
<ULONGEST
> ();
6725 return DW_UNSND (attr
);
6728 /* Subroutine of cutu_reader to simplify it.
6729 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6730 Returns NULL if the specified DWO unit cannot be found. */
6732 static struct dwo_unit
*
6733 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
6734 struct die_info
*comp_unit_die
,
6735 const char *dwo_name
)
6737 struct dwarf2_cu
*cu
= this_cu
->cu
;
6738 struct dwo_unit
*dwo_unit
;
6739 const char *comp_dir
;
6741 gdb_assert (cu
!= NULL
);
6743 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6744 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6745 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6747 if (this_cu
->is_debug_types
)
6749 struct signatured_type
*sig_type
;
6751 /* Since this_cu is the first member of struct signatured_type,
6752 we can go from a pointer to one to a pointer to the other. */
6753 sig_type
= (struct signatured_type
*) this_cu
;
6754 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
6758 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
6759 if (!signature
.has_value ())
6760 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6762 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
6763 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
6770 /* Subroutine of cutu_reader to simplify it.
6771 See it for a description of the parameters.
6772 Read a TU directly from a DWO file, bypassing the stub. */
6775 cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
6776 int use_existing_cu
)
6778 struct signatured_type
*sig_type
;
6780 /* Verify we can do the following downcast, and that we have the
6782 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6783 sig_type
= (struct signatured_type
*) this_cu
;
6784 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6786 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6788 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6789 /* There's no need to do the rereading_dwo_cu handling that
6790 cutu_reader does since we don't read the stub. */
6794 /* If !use_existing_cu, this_cu->cu must be NULL. */
6795 gdb_assert (this_cu
->cu
== NULL
);
6796 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6799 /* A future optimization, if needed, would be to use an existing
6800 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6801 could share abbrev tables. */
6803 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
6804 NULL
/* stub_comp_unit_die */,
6805 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6808 &m_dwo_abbrev_table
) == 0)
6815 /* Initialize a CU (or TU) and read its DIEs.
6816 If the CU defers to a DWO file, read the DWO file as well.
6818 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6819 Otherwise the table specified in the comp unit header is read in and used.
6820 This is an optimization for when we already have the abbrev table.
6822 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6823 Otherwise, a new CU is allocated with xmalloc. */
6825 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
6826 struct abbrev_table
*abbrev_table
,
6827 int use_existing_cu
,
6829 : die_reader_specs
{},
6832 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6833 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6834 struct dwarf2_section_info
*section
= this_cu
->section
;
6835 bfd
*abfd
= section
->get_bfd_owner ();
6836 struct dwarf2_cu
*cu
;
6837 const gdb_byte
*begin_info_ptr
;
6838 struct signatured_type
*sig_type
= NULL
;
6839 struct dwarf2_section_info
*abbrev_section
;
6840 /* Non-zero if CU currently points to a DWO file and we need to
6841 reread it. When this happens we need to reread the skeleton die
6842 before we can reread the DWO file (this only applies to CUs, not TUs). */
6843 int rereading_dwo_cu
= 0;
6845 if (dwarf_die_debug
)
6846 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
6847 this_cu
->is_debug_types
? "type" : "comp",
6848 sect_offset_str (this_cu
->sect_off
));
6850 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6851 file (instead of going through the stub), short-circuit all of this. */
6852 if (this_cu
->reading_dwo_directly
)
6854 /* Narrow down the scope of possibilities to have to understand. */
6855 gdb_assert (this_cu
->is_debug_types
);
6856 gdb_assert (abbrev_table
== NULL
);
6857 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
);
6861 /* This is cheap if the section is already read in. */
6862 section
->read (objfile
);
6864 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6866 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
6868 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6871 /* If this CU is from a DWO file we need to start over, we need to
6872 refetch the attributes from the skeleton CU.
6873 This could be optimized by retrieving those attributes from when we
6874 were here the first time: the previous comp_unit_die was stored in
6875 comp_unit_obstack. But there's no data yet that we need this
6877 if (cu
->dwo_unit
!= NULL
)
6878 rereading_dwo_cu
= 1;
6882 /* If !use_existing_cu, this_cu->cu must be NULL. */
6883 gdb_assert (this_cu
->cu
== NULL
);
6884 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6885 cu
= m_new_cu
.get ();
6888 /* Get the header. */
6889 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
6891 /* We already have the header, there's no need to read it in again. */
6892 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
6896 if (this_cu
->is_debug_types
)
6898 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6899 &cu
->header
, section
,
6900 abbrev_section
, info_ptr
,
6903 /* Since per_cu is the first member of struct signatured_type,
6904 we can go from a pointer to one to a pointer to the other. */
6905 sig_type
= (struct signatured_type
*) this_cu
;
6906 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
6907 gdb_assert (sig_type
->type_offset_in_tu
6908 == cu
->header
.type_cu_offset_in_tu
);
6909 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6911 /* LENGTH has not been set yet for type units if we're
6912 using .gdb_index. */
6913 this_cu
->length
= cu
->header
.get_length ();
6915 /* Establish the type offset that can be used to lookup the type. */
6916 sig_type
->type_offset_in_section
=
6917 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
6919 this_cu
->dwarf_version
= cu
->header
.version
;
6923 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6924 &cu
->header
, section
,
6927 rcuh_kind::COMPILE
);
6929 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6930 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
6931 this_cu
->dwarf_version
= cu
->header
.version
;
6935 /* Skip dummy compilation units. */
6936 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
6937 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6943 /* If we don't have them yet, read the abbrevs for this compilation unit.
6944 And if we need to read them now, make sure they're freed when we're
6946 if (abbrev_table
!= NULL
)
6947 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
6950 m_abbrev_table_holder
6951 = abbrev_table::read (objfile
, abbrev_section
,
6952 cu
->header
.abbrev_sect_off
);
6953 abbrev_table
= m_abbrev_table_holder
.get ();
6956 /* Read the top level CU/TU die. */
6957 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
6958 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
6960 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
6966 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
6967 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
6968 table from the DWO file and pass the ownership over to us. It will be
6969 referenced from READER, so we must make sure to free it after we're done
6972 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
6973 DWO CU, that this test will fail (the attribute will not be present). */
6974 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6975 if (dwo_name
!= nullptr)
6977 struct dwo_unit
*dwo_unit
;
6978 struct die_info
*dwo_comp_unit_die
;
6980 if (comp_unit_die
->has_children
)
6982 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
6983 " has children (offset %s) [in module %s]"),
6984 sect_offset_str (this_cu
->sect_off
),
6985 bfd_get_filename (abfd
));
6987 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
, dwo_name
);
6988 if (dwo_unit
!= NULL
)
6990 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
6991 comp_unit_die
, NULL
,
6994 &m_dwo_abbrev_table
) == 0)
7000 comp_unit_die
= dwo_comp_unit_die
;
7004 /* Yikes, we couldn't find the rest of the DIE, we only have
7005 the stub. A complaint has already been logged. There's
7006 not much more we can do except pass on the stub DIE to
7007 die_reader_func. We don't want to throw an error on bad
7014 cutu_reader::keep ()
7016 /* Done, clean up. */
7017 gdb_assert (!dummy_p
);
7018 if (m_new_cu
!= NULL
)
7020 struct dwarf2_per_objfile
*dwarf2_per_objfile
7021 = m_this_cu
->dwarf2_per_objfile
;
7022 /* Link this CU into read_in_chain. */
7023 m_this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7024 dwarf2_per_objfile
->read_in_chain
= m_this_cu
;
7025 /* The chain owns it now. */
7026 m_new_cu
.release ();
7030 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7031 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7032 assumed to have already done the lookup to find the DWO file).
7034 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7035 THIS_CU->is_debug_types, but nothing else.
7037 We fill in THIS_CU->length.
7039 THIS_CU->cu is always freed when done.
7040 This is done in order to not leave THIS_CU->cu in a state where we have
7041 to care whether it refers to the "main" CU or the DWO CU.
7043 When parent_cu is passed, it is used to provide a default value for
7044 str_offsets_base and addr_base from the parent. */
7046 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
7047 struct dwarf2_cu
*parent_cu
,
7048 struct dwo_file
*dwo_file
)
7049 : die_reader_specs
{},
7052 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7053 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7054 struct dwarf2_section_info
*section
= this_cu
->section
;
7055 bfd
*abfd
= section
->get_bfd_owner ();
7056 struct dwarf2_section_info
*abbrev_section
;
7057 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7059 if (dwarf_die_debug
)
7060 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7061 this_cu
->is_debug_types
? "type" : "comp",
7062 sect_offset_str (this_cu
->sect_off
));
7064 gdb_assert (this_cu
->cu
== NULL
);
7066 abbrev_section
= (dwo_file
!= NULL
7067 ? &dwo_file
->sections
.abbrev
7068 : get_abbrev_section_for_cu (this_cu
));
7070 /* This is cheap if the section is already read in. */
7071 section
->read (objfile
);
7073 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7075 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7076 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7077 &m_new_cu
->header
, section
,
7078 abbrev_section
, info_ptr
,
7079 (this_cu
->is_debug_types
7081 : rcuh_kind::COMPILE
));
7083 if (parent_cu
!= nullptr)
7085 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7086 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7088 this_cu
->length
= m_new_cu
->header
.get_length ();
7090 /* Skip dummy compilation units. */
7091 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7092 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7098 m_abbrev_table_holder
7099 = abbrev_table::read (objfile
, abbrev_section
,
7100 m_new_cu
->header
.abbrev_sect_off
);
7102 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7103 m_abbrev_table_holder
.get ());
7104 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7108 /* Type Unit Groups.
7110 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7111 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7112 so that all types coming from the same compilation (.o file) are grouped
7113 together. A future step could be to put the types in the same symtab as
7114 the CU the types ultimately came from. */
7117 hash_type_unit_group (const void *item
)
7119 const struct type_unit_group
*tu_group
7120 = (const struct type_unit_group
*) item
;
7122 return hash_stmt_list_entry (&tu_group
->hash
);
7126 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7128 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7129 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7131 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7134 /* Allocate a hash table for type unit groups. */
7137 allocate_type_unit_groups_table ()
7139 return htab_up (htab_create_alloc (3,
7140 hash_type_unit_group
,
7142 NULL
, xcalloc
, xfree
));
7145 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7146 partial symtabs. We combine several TUs per psymtab to not let the size
7147 of any one psymtab grow too big. */
7148 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7149 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7151 /* Helper routine for get_type_unit_group.
7152 Create the type_unit_group object used to hold one or more TUs. */
7154 static struct type_unit_group
*
7155 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7157 struct dwarf2_per_objfile
*dwarf2_per_objfile
7158 = cu
->per_cu
->dwarf2_per_objfile
;
7159 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7160 struct dwarf2_per_cu_data
*per_cu
;
7161 struct type_unit_group
*tu_group
;
7163 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7164 struct type_unit_group
);
7165 per_cu
= &tu_group
->per_cu
;
7166 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7168 if (dwarf2_per_objfile
->using_index
)
7170 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7171 struct dwarf2_per_cu_quick_data
);
7175 unsigned int line_offset
= to_underlying (line_offset_struct
);
7176 dwarf2_psymtab
*pst
;
7179 /* Give the symtab a useful name for debug purposes. */
7180 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7181 name
= string_printf ("<type_units_%d>",
7182 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7184 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7186 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7187 pst
->anonymous
= true;
7190 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7191 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7196 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7197 STMT_LIST is a DW_AT_stmt_list attribute. */
7199 static struct type_unit_group
*
7200 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7202 struct dwarf2_per_objfile
*dwarf2_per_objfile
7203 = cu
->per_cu
->dwarf2_per_objfile
;
7204 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7205 struct type_unit_group
*tu_group
;
7207 unsigned int line_offset
;
7208 struct type_unit_group type_unit_group_for_lookup
;
7210 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7211 dwarf2_per_objfile
->type_unit_groups
= allocate_type_unit_groups_table ();
7213 /* Do we need to create a new group, or can we use an existing one? */
7217 line_offset
= DW_UNSND (stmt_list
);
7218 ++tu_stats
->nr_symtab_sharers
;
7222 /* Ugh, no stmt_list. Rare, but we have to handle it.
7223 We can do various things here like create one group per TU or
7224 spread them over multiple groups to split up the expansion work.
7225 To avoid worst case scenarios (too many groups or too large groups)
7226 we, umm, group them in bunches. */
7227 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7228 | (tu_stats
->nr_stmt_less_type_units
7229 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7230 ++tu_stats
->nr_stmt_less_type_units
;
7233 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7234 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7235 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
.get (),
7236 &type_unit_group_for_lookup
, INSERT
);
7239 tu_group
= (struct type_unit_group
*) *slot
;
7240 gdb_assert (tu_group
!= NULL
);
7244 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7245 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7247 ++tu_stats
->nr_symtabs
;
7253 /* Partial symbol tables. */
7255 /* Create a psymtab named NAME and assign it to PER_CU.
7257 The caller must fill in the following details:
7258 dirname, textlow, texthigh. */
7260 static dwarf2_psymtab
*
7261 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7263 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7264 dwarf2_psymtab
*pst
;
7266 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7268 pst
->psymtabs_addrmap_supported
= true;
7270 /* This is the glue that links PST into GDB's symbol API. */
7271 per_cu
->v
.psymtab
= pst
;
7276 /* DIE reader function for process_psymtab_comp_unit. */
7279 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7280 const gdb_byte
*info_ptr
,
7281 struct die_info
*comp_unit_die
,
7282 enum language pretend_language
)
7284 struct dwarf2_cu
*cu
= reader
->cu
;
7285 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7286 struct gdbarch
*gdbarch
= objfile
->arch ();
7287 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7289 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7290 dwarf2_psymtab
*pst
;
7291 enum pc_bounds_kind cu_bounds_kind
;
7292 const char *filename
;
7294 gdb_assert (! per_cu
->is_debug_types
);
7296 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7298 /* Allocate a new partial symbol table structure. */
7299 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7300 static const char artificial
[] = "<artificial>";
7301 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7302 if (filename
== NULL
)
7304 else if (strcmp (filename
, artificial
) == 0)
7306 debug_filename
.reset (concat (artificial
, "@",
7307 sect_offset_str (per_cu
->sect_off
),
7309 filename
= debug_filename
.get ();
7312 pst
= create_partial_symtab (per_cu
, filename
);
7314 /* This must be done before calling dwarf2_build_include_psymtabs. */
7315 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7317 baseaddr
= objfile
->text_section_offset ();
7319 dwarf2_find_base_address (comp_unit_die
, cu
);
7321 /* Possibly set the default values of LOWPC and HIGHPC from
7323 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7324 &best_highpc
, cu
, pst
);
7325 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7328 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7331 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7333 /* Store the contiguous range if it is not empty; it can be
7334 empty for CUs with no code. */
7335 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7339 /* Check if comp unit has_children.
7340 If so, read the rest of the partial symbols from this comp unit.
7341 If not, there's no more debug_info for this comp unit. */
7342 if (comp_unit_die
->has_children
)
7344 struct partial_die_info
*first_die
;
7345 CORE_ADDR lowpc
, highpc
;
7347 lowpc
= ((CORE_ADDR
) -1);
7348 highpc
= ((CORE_ADDR
) 0);
7350 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7352 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7353 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7355 /* If we didn't find a lowpc, set it to highpc to avoid
7356 complaints from `maint check'. */
7357 if (lowpc
== ((CORE_ADDR
) -1))
7360 /* If the compilation unit didn't have an explicit address range,
7361 then use the information extracted from its child dies. */
7362 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7365 best_highpc
= highpc
;
7368 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7369 best_lowpc
+ baseaddr
)
7371 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7372 best_highpc
+ baseaddr
)
7375 end_psymtab_common (objfile
, pst
);
7377 if (!cu
->per_cu
->imported_symtabs_empty ())
7380 int len
= cu
->per_cu
->imported_symtabs_size ();
7382 /* Fill in 'dependencies' here; we fill in 'users' in a
7384 pst
->number_of_dependencies
= len
;
7386 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7387 for (i
= 0; i
< len
; ++i
)
7389 pst
->dependencies
[i
]
7390 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7393 cu
->per_cu
->imported_symtabs_free ();
7396 /* Get the list of files included in the current compilation unit,
7397 and build a psymtab for each of them. */
7398 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7400 if (dwarf_read_debug
)
7401 fprintf_unfiltered (gdb_stdlog
,
7402 "Psymtab for %s unit @%s: %s - %s"
7403 ", %d global, %d static syms\n",
7404 per_cu
->is_debug_types
? "type" : "comp",
7405 sect_offset_str (per_cu
->sect_off
),
7406 paddress (gdbarch
, pst
->text_low (objfile
)),
7407 paddress (gdbarch
, pst
->text_high (objfile
)),
7408 pst
->n_global_syms
, pst
->n_static_syms
);
7411 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7412 Process compilation unit THIS_CU for a psymtab. */
7415 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7416 bool want_partial_unit
,
7417 enum language pretend_language
)
7419 /* If this compilation unit was already read in, free the
7420 cached copy in order to read it in again. This is
7421 necessary because we skipped some symbols when we first
7422 read in the compilation unit (see load_partial_dies).
7423 This problem could be avoided, but the benefit is unclear. */
7424 if (this_cu
->cu
!= NULL
)
7425 free_one_cached_comp_unit (this_cu
);
7427 cutu_reader
reader (this_cu
, NULL
, 0, false);
7429 switch (reader
.comp_unit_die
->tag
)
7431 case DW_TAG_compile_unit
:
7432 this_cu
->unit_type
= DW_UT_compile
;
7434 case DW_TAG_partial_unit
:
7435 this_cu
->unit_type
= DW_UT_partial
;
7445 else if (this_cu
->is_debug_types
)
7446 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7447 reader
.comp_unit_die
);
7448 else if (want_partial_unit
7449 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7450 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7451 reader
.comp_unit_die
,
7454 this_cu
->lang
= this_cu
->cu
->language
;
7456 /* Age out any secondary CUs. */
7457 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
7460 /* Reader function for build_type_psymtabs. */
7463 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7464 const gdb_byte
*info_ptr
,
7465 struct die_info
*type_unit_die
)
7467 struct dwarf2_per_objfile
*dwarf2_per_objfile
7468 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
7469 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7470 struct dwarf2_cu
*cu
= reader
->cu
;
7471 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7472 struct signatured_type
*sig_type
;
7473 struct type_unit_group
*tu_group
;
7474 struct attribute
*attr
;
7475 struct partial_die_info
*first_die
;
7476 CORE_ADDR lowpc
, highpc
;
7477 dwarf2_psymtab
*pst
;
7479 gdb_assert (per_cu
->is_debug_types
);
7480 sig_type
= (struct signatured_type
*) per_cu
;
7482 if (! type_unit_die
->has_children
)
7485 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7486 tu_group
= get_type_unit_group (cu
, attr
);
7488 if (tu_group
->tus
== nullptr)
7489 tu_group
->tus
= new std::vector
<signatured_type
*>;
7490 tu_group
->tus
->push_back (sig_type
);
7492 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7493 pst
= create_partial_symtab (per_cu
, "");
7494 pst
->anonymous
= true;
7496 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7498 lowpc
= (CORE_ADDR
) -1;
7499 highpc
= (CORE_ADDR
) 0;
7500 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7502 end_psymtab_common (objfile
, pst
);
7505 /* Struct used to sort TUs by their abbreviation table offset. */
7507 struct tu_abbrev_offset
7509 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7510 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7513 signatured_type
*sig_type
;
7514 sect_offset abbrev_offset
;
7517 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7520 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7521 const struct tu_abbrev_offset
&b
)
7523 return a
.abbrev_offset
< b
.abbrev_offset
;
7526 /* Efficiently read all the type units.
7527 This does the bulk of the work for build_type_psymtabs.
7529 The efficiency is because we sort TUs by the abbrev table they use and
7530 only read each abbrev table once. In one program there are 200K TUs
7531 sharing 8K abbrev tables.
7533 The main purpose of this function is to support building the
7534 dwarf2_per_objfile->type_unit_groups table.
7535 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7536 can collapse the search space by grouping them by stmt_list.
7537 The savings can be significant, in the same program from above the 200K TUs
7538 share 8K stmt_list tables.
7540 FUNC is expected to call get_type_unit_group, which will create the
7541 struct type_unit_group if necessary and add it to
7542 dwarf2_per_objfile->type_unit_groups. */
7545 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7547 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7548 abbrev_table_up abbrev_table
;
7549 sect_offset abbrev_offset
;
7551 /* It's up to the caller to not call us multiple times. */
7552 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
7554 if (dwarf2_per_objfile
->all_type_units
.empty ())
7557 /* TUs typically share abbrev tables, and there can be way more TUs than
7558 abbrev tables. Sort by abbrev table to reduce the number of times we
7559 read each abbrev table in.
7560 Alternatives are to punt or to maintain a cache of abbrev tables.
7561 This is simpler and efficient enough for now.
7563 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7564 symtab to use). Typically TUs with the same abbrev offset have the same
7565 stmt_list value too so in practice this should work well.
7567 The basic algorithm here is:
7569 sort TUs by abbrev table
7570 for each TU with same abbrev table:
7571 read abbrev table if first user
7572 read TU top level DIE
7573 [IWBN if DWO skeletons had DW_AT_stmt_list]
7576 if (dwarf_read_debug
)
7577 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7579 /* Sort in a separate table to maintain the order of all_type_units
7580 for .gdb_index: TU indices directly index all_type_units. */
7581 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7582 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
7584 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
7585 sorted_by_abbrev
.emplace_back
7586 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
7587 sig_type
->per_cu
.section
,
7588 sig_type
->per_cu
.sect_off
));
7590 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7591 sort_tu_by_abbrev_offset
);
7593 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7595 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7597 /* Switch to the next abbrev table if necessary. */
7598 if (abbrev_table
== NULL
7599 || tu
.abbrev_offset
!= abbrev_offset
)
7601 abbrev_offset
= tu
.abbrev_offset
;
7603 abbrev_table::read (dwarf2_per_objfile
->objfile
,
7604 &dwarf2_per_objfile
->abbrev
,
7606 ++tu_stats
->nr_uniq_abbrev_tables
;
7609 cutu_reader
reader (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
7611 if (!reader
.dummy_p
)
7612 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7613 reader
.comp_unit_die
);
7617 /* Print collected type unit statistics. */
7620 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7622 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7624 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7625 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
7626 dwarf2_per_objfile
->all_type_units
.size ());
7627 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7628 tu_stats
->nr_uniq_abbrev_tables
);
7629 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7630 tu_stats
->nr_symtabs
);
7631 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7632 tu_stats
->nr_symtab_sharers
);
7633 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7634 tu_stats
->nr_stmt_less_type_units
);
7635 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7636 tu_stats
->nr_all_type_units_reallocs
);
7639 /* Traversal function for build_type_psymtabs. */
7642 build_type_psymtab_dependencies (void **slot
, void *info
)
7644 struct dwarf2_per_objfile
*dwarf2_per_objfile
7645 = (struct dwarf2_per_objfile
*) info
;
7646 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7647 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7648 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7649 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7650 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
7653 gdb_assert (len
> 0);
7654 gdb_assert (per_cu
->type_unit_group_p ());
7656 pst
->number_of_dependencies
= len
;
7657 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
7658 for (i
= 0; i
< len
; ++i
)
7660 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
7661 gdb_assert (iter
->per_cu
.is_debug_types
);
7662 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7663 iter
->type_unit_group
= tu_group
;
7666 delete tu_group
->tus
;
7667 tu_group
->tus
= nullptr;
7672 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7673 Build partial symbol tables for the .debug_types comp-units. */
7676 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7678 if (! create_all_type_units (dwarf2_per_objfile
))
7681 build_type_psymtabs_1 (dwarf2_per_objfile
);
7684 /* Traversal function for process_skeletonless_type_unit.
7685 Read a TU in a DWO file and build partial symbols for it. */
7688 process_skeletonless_type_unit (void **slot
, void *info
)
7690 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7691 struct dwarf2_per_objfile
*dwarf2_per_objfile
7692 = (struct dwarf2_per_objfile
*) info
;
7693 struct signatured_type find_entry
, *entry
;
7695 /* If this TU doesn't exist in the global table, add it and read it in. */
7697 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7698 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
7700 find_entry
.signature
= dwo_unit
->signature
;
7701 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
7702 &find_entry
, INSERT
);
7703 /* If we've already seen this type there's nothing to do. What's happening
7704 is we're doing our own version of comdat-folding here. */
7708 /* This does the job that create_all_type_units would have done for
7710 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
7711 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
7714 /* This does the job that build_type_psymtabs_1 would have done. */
7715 cutu_reader
reader (&entry
->per_cu
, NULL
, 0, false);
7716 if (!reader
.dummy_p
)
7717 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7718 reader
.comp_unit_die
);
7723 /* Traversal function for process_skeletonless_type_units. */
7726 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7728 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7730 if (dwo_file
->tus
!= NULL
)
7731 htab_traverse_noresize (dwo_file
->tus
.get (),
7732 process_skeletonless_type_unit
, info
);
7737 /* Scan all TUs of DWO files, verifying we've processed them.
7738 This is needed in case a TU was emitted without its skeleton.
7739 Note: This can't be done until we know what all the DWO files are. */
7742 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7744 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7745 if (get_dwp_file (dwarf2_per_objfile
) == NULL
7746 && dwarf2_per_objfile
->dwo_files
!= NULL
)
7748 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
7749 process_dwo_file_for_skeletonless_type_units
,
7750 dwarf2_per_objfile
);
7754 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
7757 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7759 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7761 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7766 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7768 /* Set the 'user' field only if it is not already set. */
7769 if (pst
->dependencies
[j
]->user
== NULL
)
7770 pst
->dependencies
[j
]->user
= pst
;
7775 /* Build the partial symbol table by doing a quick pass through the
7776 .debug_info and .debug_abbrev sections. */
7779 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7781 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7783 if (dwarf_read_debug
)
7785 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7786 objfile_name (objfile
));
7789 scoped_restore restore_reading_psyms
7790 = make_scoped_restore (&dwarf2_per_objfile
->reading_partial_symbols
,
7793 dwarf2_per_objfile
->info
.read (objfile
);
7795 /* Any cached compilation units will be linked by the per-objfile
7796 read_in_chain. Make sure to free them when we're done. */
7797 free_cached_comp_units
freer (dwarf2_per_objfile
);
7799 build_type_psymtabs (dwarf2_per_objfile
);
7801 create_all_comp_units (dwarf2_per_objfile
);
7803 /* Create a temporary address map on a temporary obstack. We later
7804 copy this to the final obstack. */
7805 auto_obstack temp_obstack
;
7807 scoped_restore save_psymtabs_addrmap
7808 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
7809 addrmap_create_mutable (&temp_obstack
));
7811 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7813 if (per_cu
->v
.psymtab
!= NULL
)
7814 /* In case a forward DW_TAG_imported_unit has read the CU already. */
7816 process_psymtab_comp_unit (per_cu
, false, language_minimal
);
7819 /* This has to wait until we read the CUs, we need the list of DWOs. */
7820 process_skeletonless_type_units (dwarf2_per_objfile
);
7822 /* Now that all TUs have been processed we can fill in the dependencies. */
7823 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
7825 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
.get (),
7826 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
7829 if (dwarf_read_debug
)
7830 print_tu_stats (dwarf2_per_objfile
);
7832 set_partial_user (dwarf2_per_objfile
);
7834 objfile
->partial_symtabs
->psymtabs_addrmap
7835 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
7836 objfile
->partial_symtabs
->obstack ());
7837 /* At this point we want to keep the address map. */
7838 save_psymtabs_addrmap
.release ();
7840 if (dwarf_read_debug
)
7841 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7842 objfile_name (objfile
));
7845 /* Load the partial DIEs for a secondary CU into memory.
7846 This is also used when rereading a primary CU with load_all_dies. */
7849 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
7851 cutu_reader
reader (this_cu
, NULL
, 1, false);
7853 if (!reader
.dummy_p
)
7855 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
7858 /* Check if comp unit has_children.
7859 If so, read the rest of the partial symbols from this comp unit.
7860 If not, there's no more debug_info for this comp unit. */
7861 if (reader
.comp_unit_die
->has_children
)
7862 load_partial_dies (&reader
, reader
.info_ptr
, 0);
7869 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
7870 struct dwarf2_section_info
*section
,
7871 struct dwarf2_section_info
*abbrev_section
,
7872 unsigned int is_dwz
)
7874 const gdb_byte
*info_ptr
;
7875 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7877 if (dwarf_read_debug
)
7878 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
7879 section
->get_name (),
7880 section
->get_file_name ());
7882 section
->read (objfile
);
7884 info_ptr
= section
->buffer
;
7886 while (info_ptr
< section
->buffer
+ section
->size
)
7888 struct dwarf2_per_cu_data
*this_cu
;
7890 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
7892 comp_unit_head cu_header
;
7893 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
7894 abbrev_section
, info_ptr
,
7895 rcuh_kind::COMPILE
);
7897 /* Save the compilation unit for later lookup. */
7898 if (cu_header
.unit_type
!= DW_UT_type
)
7900 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
7901 struct dwarf2_per_cu_data
);
7902 memset (this_cu
, 0, sizeof (*this_cu
));
7906 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
7907 struct signatured_type
);
7908 memset (sig_type
, 0, sizeof (*sig_type
));
7909 sig_type
->signature
= cu_header
.signature
;
7910 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
7911 this_cu
= &sig_type
->per_cu
;
7913 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
7914 this_cu
->sect_off
= sect_off
;
7915 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
7916 this_cu
->is_dwz
= is_dwz
;
7917 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7918 this_cu
->section
= section
;
7920 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
7922 info_ptr
= info_ptr
+ this_cu
->length
;
7926 /* Create a list of all compilation units in OBJFILE.
7927 This is only done for -readnow and building partial symtabs. */
7930 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7932 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
7933 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
7934 &dwarf2_per_objfile
->abbrev
, 0);
7936 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
7938 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
7942 /* Process all loaded DIEs for compilation unit CU, starting at
7943 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
7944 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
7945 DW_AT_ranges). See the comments of add_partial_subprogram on how
7946 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
7949 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
7950 CORE_ADDR
*highpc
, int set_addrmap
,
7951 struct dwarf2_cu
*cu
)
7953 struct partial_die_info
*pdi
;
7955 /* Now, march along the PDI's, descending into ones which have
7956 interesting children but skipping the children of the other ones,
7957 until we reach the end of the compilation unit. */
7965 /* Anonymous namespaces or modules have no name but have interesting
7966 children, so we need to look at them. Ditto for anonymous
7969 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
7970 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
7971 || pdi
->tag
== DW_TAG_imported_unit
7972 || pdi
->tag
== DW_TAG_inlined_subroutine
)
7976 case DW_TAG_subprogram
:
7977 case DW_TAG_inlined_subroutine
:
7978 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7980 case DW_TAG_constant
:
7981 case DW_TAG_variable
:
7982 case DW_TAG_typedef
:
7983 case DW_TAG_union_type
:
7984 if (!pdi
->is_declaration
7985 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
7987 add_partial_symbol (pdi
, cu
);
7990 case DW_TAG_class_type
:
7991 case DW_TAG_interface_type
:
7992 case DW_TAG_structure_type
:
7993 if (!pdi
->is_declaration
)
7995 add_partial_symbol (pdi
, cu
);
7997 if ((cu
->language
== language_rust
7998 || cu
->language
== language_cplus
) && pdi
->has_children
)
7999 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8002 case DW_TAG_enumeration_type
:
8003 if (!pdi
->is_declaration
)
8004 add_partial_enumeration (pdi
, cu
);
8006 case DW_TAG_base_type
:
8007 case DW_TAG_subrange_type
:
8008 /* File scope base type definitions are added to the partial
8010 add_partial_symbol (pdi
, cu
);
8012 case DW_TAG_namespace
:
8013 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8016 if (!pdi
->is_declaration
)
8017 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8019 case DW_TAG_imported_unit
:
8021 struct dwarf2_per_cu_data
*per_cu
;
8023 /* For now we don't handle imported units in type units. */
8024 if (cu
->per_cu
->is_debug_types
)
8026 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8027 " supported in type units [in module %s]"),
8028 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8031 per_cu
= dwarf2_find_containing_comp_unit
8032 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8033 cu
->per_cu
->dwarf2_per_objfile
);
8035 /* Go read the partial unit, if needed. */
8036 if (per_cu
->v
.psymtab
== NULL
)
8037 process_psymtab_comp_unit (per_cu
, true, cu
->language
);
8039 cu
->per_cu
->imported_symtabs_push (per_cu
);
8042 case DW_TAG_imported_declaration
:
8043 add_partial_symbol (pdi
, cu
);
8050 /* If the die has a sibling, skip to the sibling. */
8052 pdi
= pdi
->die_sibling
;
8056 /* Functions used to compute the fully scoped name of a partial DIE.
8058 Normally, this is simple. For C++, the parent DIE's fully scoped
8059 name is concatenated with "::" and the partial DIE's name.
8060 Enumerators are an exception; they use the scope of their parent
8061 enumeration type, i.e. the name of the enumeration type is not
8062 prepended to the enumerator.
8064 There are two complexities. One is DW_AT_specification; in this
8065 case "parent" means the parent of the target of the specification,
8066 instead of the direct parent of the DIE. The other is compilers
8067 which do not emit DW_TAG_namespace; in this case we try to guess
8068 the fully qualified name of structure types from their members'
8069 linkage names. This must be done using the DIE's children rather
8070 than the children of any DW_AT_specification target. We only need
8071 to do this for structures at the top level, i.e. if the target of
8072 any DW_AT_specification (if any; otherwise the DIE itself) does not
8075 /* Compute the scope prefix associated with PDI's parent, in
8076 compilation unit CU. The result will be allocated on CU's
8077 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8078 field. NULL is returned if no prefix is necessary. */
8080 partial_die_parent_scope (struct partial_die_info
*pdi
,
8081 struct dwarf2_cu
*cu
)
8083 const char *grandparent_scope
;
8084 struct partial_die_info
*parent
, *real_pdi
;
8086 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8087 then this means the parent of the specification DIE. */
8090 while (real_pdi
->has_specification
)
8092 auto res
= find_partial_die (real_pdi
->spec_offset
,
8093 real_pdi
->spec_is_dwz
, cu
);
8098 parent
= real_pdi
->die_parent
;
8102 if (parent
->scope_set
)
8103 return parent
->scope
;
8107 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8109 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8110 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8111 Work around this problem here. */
8112 if (cu
->language
== language_cplus
8113 && parent
->tag
== DW_TAG_namespace
8114 && strcmp (parent
->name
, "::") == 0
8115 && grandparent_scope
== NULL
)
8117 parent
->scope
= NULL
;
8118 parent
->scope_set
= 1;
8122 /* Nested subroutines in Fortran get a prefix. */
8123 if (pdi
->tag
== DW_TAG_enumerator
)
8124 /* Enumerators should not get the name of the enumeration as a prefix. */
8125 parent
->scope
= grandparent_scope
;
8126 else if (parent
->tag
== DW_TAG_namespace
8127 || parent
->tag
== DW_TAG_module
8128 || parent
->tag
== DW_TAG_structure_type
8129 || parent
->tag
== DW_TAG_class_type
8130 || parent
->tag
== DW_TAG_interface_type
8131 || parent
->tag
== DW_TAG_union_type
8132 || parent
->tag
== DW_TAG_enumeration_type
8133 || (cu
->language
== language_fortran
8134 && parent
->tag
== DW_TAG_subprogram
8135 && pdi
->tag
== DW_TAG_subprogram
))
8137 if (grandparent_scope
== NULL
)
8138 parent
->scope
= parent
->name
;
8140 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8142 parent
->name
, 0, cu
);
8146 /* FIXME drow/2004-04-01: What should we be doing with
8147 function-local names? For partial symbols, we should probably be
8149 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8150 dwarf_tag_name (parent
->tag
),
8151 sect_offset_str (pdi
->sect_off
));
8152 parent
->scope
= grandparent_scope
;
8155 parent
->scope_set
= 1;
8156 return parent
->scope
;
8159 /* Return the fully scoped name associated with PDI, from compilation unit
8160 CU. The result will be allocated with malloc. */
8162 static gdb::unique_xmalloc_ptr
<char>
8163 partial_die_full_name (struct partial_die_info
*pdi
,
8164 struct dwarf2_cu
*cu
)
8166 const char *parent_scope
;
8168 /* If this is a template instantiation, we can not work out the
8169 template arguments from partial DIEs. So, unfortunately, we have
8170 to go through the full DIEs. At least any work we do building
8171 types here will be reused if full symbols are loaded later. */
8172 if (pdi
->has_template_arguments
)
8176 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8178 struct die_info
*die
;
8179 struct attribute attr
;
8180 struct dwarf2_cu
*ref_cu
= cu
;
8182 /* DW_FORM_ref_addr is using section offset. */
8183 attr
.name
= (enum dwarf_attribute
) 0;
8184 attr
.form
= DW_FORM_ref_addr
;
8185 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8186 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8188 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8192 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8193 if (parent_scope
== NULL
)
8196 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8201 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8203 struct dwarf2_per_objfile
*dwarf2_per_objfile
8204 = cu
->per_cu
->dwarf2_per_objfile
;
8205 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8206 struct gdbarch
*gdbarch
= objfile
->arch ();
8208 const char *actual_name
= NULL
;
8211 baseaddr
= objfile
->text_section_offset ();
8213 gdb::unique_xmalloc_ptr
<char> built_actual_name
8214 = partial_die_full_name (pdi
, cu
);
8215 if (built_actual_name
!= NULL
)
8216 actual_name
= built_actual_name
.get ();
8218 if (actual_name
== NULL
)
8219 actual_name
= pdi
->name
;
8223 case DW_TAG_inlined_subroutine
:
8224 case DW_TAG_subprogram
:
8225 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8227 if (pdi
->is_external
8228 || cu
->language
== language_ada
8229 || (cu
->language
== language_fortran
8230 && pdi
->die_parent
!= NULL
8231 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8233 /* Normally, only "external" DIEs are part of the global scope.
8234 But in Ada and Fortran, we want to be able to access nested
8235 procedures globally. So all Ada and Fortran subprograms are
8236 stored in the global scope. */
8237 add_psymbol_to_list (actual_name
,
8238 built_actual_name
!= NULL
,
8239 VAR_DOMAIN
, LOC_BLOCK
,
8240 SECT_OFF_TEXT (objfile
),
8241 psymbol_placement::GLOBAL
,
8243 cu
->language
, objfile
);
8247 add_psymbol_to_list (actual_name
,
8248 built_actual_name
!= NULL
,
8249 VAR_DOMAIN
, LOC_BLOCK
,
8250 SECT_OFF_TEXT (objfile
),
8251 psymbol_placement::STATIC
,
8252 addr
, cu
->language
, objfile
);
8255 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8256 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8258 case DW_TAG_constant
:
8259 add_psymbol_to_list (actual_name
,
8260 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8261 -1, (pdi
->is_external
8262 ? psymbol_placement::GLOBAL
8263 : psymbol_placement::STATIC
),
8264 0, cu
->language
, objfile
);
8266 case DW_TAG_variable
:
8268 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8272 && !dwarf2_per_objfile
->has_section_at_zero
)
8274 /* A global or static variable may also have been stripped
8275 out by the linker if unused, in which case its address
8276 will be nullified; do not add such variables into partial
8277 symbol table then. */
8279 else if (pdi
->is_external
)
8282 Don't enter into the minimal symbol tables as there is
8283 a minimal symbol table entry from the ELF symbols already.
8284 Enter into partial symbol table if it has a location
8285 descriptor or a type.
8286 If the location descriptor is missing, new_symbol will create
8287 a LOC_UNRESOLVED symbol, the address of the variable will then
8288 be determined from the minimal symbol table whenever the variable
8290 The address for the partial symbol table entry is not
8291 used by GDB, but it comes in handy for debugging partial symbol
8294 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8295 add_psymbol_to_list (actual_name
,
8296 built_actual_name
!= NULL
,
8297 VAR_DOMAIN
, LOC_STATIC
,
8298 SECT_OFF_TEXT (objfile
),
8299 psymbol_placement::GLOBAL
,
8300 addr
, cu
->language
, objfile
);
8304 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8306 /* Static Variable. Skip symbols whose value we cannot know (those
8307 without location descriptors or constant values). */
8308 if (!has_loc
&& !pdi
->has_const_value
)
8311 add_psymbol_to_list (actual_name
,
8312 built_actual_name
!= NULL
,
8313 VAR_DOMAIN
, LOC_STATIC
,
8314 SECT_OFF_TEXT (objfile
),
8315 psymbol_placement::STATIC
,
8317 cu
->language
, objfile
);
8320 case DW_TAG_typedef
:
8321 case DW_TAG_base_type
:
8322 case DW_TAG_subrange_type
:
8323 add_psymbol_to_list (actual_name
,
8324 built_actual_name
!= NULL
,
8325 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8326 psymbol_placement::STATIC
,
8327 0, cu
->language
, objfile
);
8329 case DW_TAG_imported_declaration
:
8330 case DW_TAG_namespace
:
8331 add_psymbol_to_list (actual_name
,
8332 built_actual_name
!= NULL
,
8333 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8334 psymbol_placement::GLOBAL
,
8335 0, cu
->language
, objfile
);
8338 /* With Fortran 77 there might be a "BLOCK DATA" module
8339 available without any name. If so, we skip the module as it
8340 doesn't bring any value. */
8341 if (actual_name
!= nullptr)
8342 add_psymbol_to_list (actual_name
,
8343 built_actual_name
!= NULL
,
8344 MODULE_DOMAIN
, LOC_TYPEDEF
, -1,
8345 psymbol_placement::GLOBAL
,
8346 0, cu
->language
, objfile
);
8348 case DW_TAG_class_type
:
8349 case DW_TAG_interface_type
:
8350 case DW_TAG_structure_type
:
8351 case DW_TAG_union_type
:
8352 case DW_TAG_enumeration_type
:
8353 /* Skip external references. The DWARF standard says in the section
8354 about "Structure, Union, and Class Type Entries": "An incomplete
8355 structure, union or class type is represented by a structure,
8356 union or class entry that does not have a byte size attribute
8357 and that has a DW_AT_declaration attribute." */
8358 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8361 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8362 static vs. global. */
8363 add_psymbol_to_list (actual_name
,
8364 built_actual_name
!= NULL
,
8365 STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
8366 cu
->language
== language_cplus
8367 ? psymbol_placement::GLOBAL
8368 : psymbol_placement::STATIC
,
8369 0, cu
->language
, objfile
);
8372 case DW_TAG_enumerator
:
8373 add_psymbol_to_list (actual_name
,
8374 built_actual_name
!= NULL
,
8375 VAR_DOMAIN
, LOC_CONST
, -1,
8376 cu
->language
== language_cplus
8377 ? psymbol_placement::GLOBAL
8378 : psymbol_placement::STATIC
,
8379 0, cu
->language
, 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 return linkage_name
;
10037 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10038 compute the physname for the object, which include a method's:
10039 - formal parameters (C++),
10040 - receiver type (Go),
10042 The term "physname" is a bit confusing.
10043 For C++, for example, it is the demangled name.
10044 For Go, for example, it's the mangled name.
10046 For Ada, return the DIE's linkage name rather than the fully qualified
10047 name. PHYSNAME is ignored..
10049 The result is allocated on the objfile_obstack and canonicalized. */
10051 static const char *
10052 dwarf2_compute_name (const char *name
,
10053 struct die_info
*die
, struct dwarf2_cu
*cu
,
10056 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10059 name
= dwarf2_name (die
, cu
);
10061 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10062 but otherwise compute it by typename_concat inside GDB.
10063 FIXME: Actually this is not really true, or at least not always true.
10064 It's all very confusing. compute_and_set_names doesn't try to demangle
10065 Fortran names because there is no mangling standard. So new_symbol
10066 will set the demangled name to the result of dwarf2_full_name, and it is
10067 the demangled name that GDB uses if it exists. */
10068 if (cu
->language
== language_ada
10069 || (cu
->language
== language_fortran
&& physname
))
10071 /* For Ada unit, we prefer the linkage name over the name, as
10072 the former contains the exported name, which the user expects
10073 to be able to reference. Ideally, we want the user to be able
10074 to reference this entity using either natural or linkage name,
10075 but we haven't started looking at this enhancement yet. */
10076 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10078 if (linkage_name
!= NULL
)
10079 return linkage_name
;
10082 /* These are the only languages we know how to qualify names in. */
10084 && (cu
->language
== language_cplus
10085 || cu
->language
== language_fortran
|| cu
->language
== language_d
10086 || cu
->language
== language_rust
))
10088 if (die_needs_namespace (die
, cu
))
10090 const char *prefix
;
10091 const char *canonical_name
= NULL
;
10095 prefix
= determine_prefix (die
, cu
);
10096 if (*prefix
!= '\0')
10098 gdb::unique_xmalloc_ptr
<char> prefixed_name
10099 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10101 buf
.puts (prefixed_name
.get ());
10106 /* Template parameters may be specified in the DIE's DW_AT_name, or
10107 as children with DW_TAG_template_type_param or
10108 DW_TAG_value_type_param. If the latter, add them to the name
10109 here. If the name already has template parameters, then
10110 skip this step; some versions of GCC emit both, and
10111 it is more efficient to use the pre-computed name.
10113 Something to keep in mind about this process: it is very
10114 unlikely, or in some cases downright impossible, to produce
10115 something that will match the mangled name of a function.
10116 If the definition of the function has the same debug info,
10117 we should be able to match up with it anyway. But fallbacks
10118 using the minimal symbol, for instance to find a method
10119 implemented in a stripped copy of libstdc++, will not work.
10120 If we do not have debug info for the definition, we will have to
10121 match them up some other way.
10123 When we do name matching there is a related problem with function
10124 templates; two instantiated function templates are allowed to
10125 differ only by their return types, which we do not add here. */
10127 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10129 struct attribute
*attr
;
10130 struct die_info
*child
;
10133 die
->building_fullname
= 1;
10135 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10139 const gdb_byte
*bytes
;
10140 struct dwarf2_locexpr_baton
*baton
;
10143 if (child
->tag
!= DW_TAG_template_type_param
10144 && child
->tag
!= DW_TAG_template_value_param
)
10155 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10158 complaint (_("template parameter missing DW_AT_type"));
10159 buf
.puts ("UNKNOWN_TYPE");
10162 type
= die_type (child
, cu
);
10164 if (child
->tag
== DW_TAG_template_type_param
)
10166 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10167 &type_print_raw_options
);
10171 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10174 complaint (_("template parameter missing "
10175 "DW_AT_const_value"));
10176 buf
.puts ("UNKNOWN_VALUE");
10180 dwarf2_const_value_attr (attr
, type
, name
,
10181 &cu
->comp_unit_obstack
, cu
,
10182 &value
, &bytes
, &baton
);
10184 if (TYPE_NOSIGN (type
))
10185 /* GDB prints characters as NUMBER 'CHAR'. If that's
10186 changed, this can use value_print instead. */
10187 c_printchar (value
, type
, &buf
);
10190 struct value_print_options opts
;
10193 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10197 else if (bytes
!= NULL
)
10199 v
= allocate_value (type
);
10200 memcpy (value_contents_writeable (v
), bytes
,
10201 TYPE_LENGTH (type
));
10204 v
= value_from_longest (type
, value
);
10206 /* Specify decimal so that we do not depend on
10208 get_formatted_print_options (&opts
, 'd');
10210 value_print (v
, &buf
, &opts
);
10215 die
->building_fullname
= 0;
10219 /* Close the argument list, with a space if necessary
10220 (nested templates). */
10221 if (!buf
.empty () && buf
.string ().back () == '>')
10228 /* For C++ methods, append formal parameter type
10229 information, if PHYSNAME. */
10231 if (physname
&& die
->tag
== DW_TAG_subprogram
10232 && cu
->language
== language_cplus
)
10234 struct type
*type
= read_type_die (die
, cu
);
10236 c_type_print_args (type
, &buf
, 1, cu
->language
,
10237 &type_print_raw_options
);
10239 if (cu
->language
== language_cplus
)
10241 /* Assume that an artificial first parameter is
10242 "this", but do not crash if it is not. RealView
10243 marks unnamed (and thus unused) parameters as
10244 artificial; there is no way to differentiate
10246 if (TYPE_NFIELDS (type
) > 0
10247 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10248 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10249 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10251 buf
.puts (" const");
10255 const std::string
&intermediate_name
= buf
.string ();
10257 if (cu
->language
== language_cplus
)
10259 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10262 /* If we only computed INTERMEDIATE_NAME, or if
10263 INTERMEDIATE_NAME is already canonical, then we need to
10265 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10266 name
= objfile
->intern (intermediate_name
);
10268 name
= canonical_name
;
10275 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10276 If scope qualifiers are appropriate they will be added. The result
10277 will be allocated on the storage_obstack, or NULL if the DIE does
10278 not have a name. NAME may either be from a previous call to
10279 dwarf2_name or NULL.
10281 The output string will be canonicalized (if C++). */
10283 static const char *
10284 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10286 return dwarf2_compute_name (name
, die
, cu
, 0);
10289 /* Construct a physname for the given DIE in CU. NAME may either be
10290 from a previous call to dwarf2_name or NULL. The result will be
10291 allocated on the objfile_objstack or NULL if the DIE does not have a
10294 The output string will be canonicalized (if C++). */
10296 static const char *
10297 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10299 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10300 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10303 /* In this case dwarf2_compute_name is just a shortcut not building anything
10305 if (!die_needs_namespace (die
, cu
))
10306 return dwarf2_compute_name (name
, die
, cu
, 1);
10308 mangled
= dw2_linkage_name (die
, cu
);
10310 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10311 See https://github.com/rust-lang/rust/issues/32925. */
10312 if (cu
->language
== language_rust
&& mangled
!= NULL
10313 && strchr (mangled
, '{') != NULL
)
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 /* Add an aggregate field to the field list. */
14218 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14219 struct dwarf2_cu
*cu
)
14221 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14222 struct gdbarch
*gdbarch
= objfile
->arch ();
14223 struct nextfield
*new_field
;
14224 struct attribute
*attr
;
14226 const char *fieldname
= "";
14228 if (die
->tag
== DW_TAG_inheritance
)
14230 fip
->baseclasses
.emplace_back ();
14231 new_field
= &fip
->baseclasses
.back ();
14235 fip
->fields
.emplace_back ();
14236 new_field
= &fip
->fields
.back ();
14239 new_field
->offset
= die
->sect_off
;
14241 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14242 if (attr
!= nullptr)
14243 new_field
->accessibility
= DW_UNSND (attr
);
14245 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14246 if (new_field
->accessibility
!= DW_ACCESS_public
)
14247 fip
->non_public_fields
= 1;
14249 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14250 if (attr
!= nullptr)
14251 new_field
->virtuality
= DW_UNSND (attr
);
14253 new_field
->virtuality
= DW_VIRTUALITY_none
;
14255 fp
= &new_field
->field
;
14257 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14261 /* Data member other than a C++ static data member. */
14263 /* Get type of field. */
14264 fp
->type
= die_type (die
, cu
);
14266 SET_FIELD_BITPOS (*fp
, 0);
14268 /* Get bit size of field (zero if none). */
14269 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14270 if (attr
!= nullptr)
14272 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14276 FIELD_BITSIZE (*fp
) = 0;
14279 /* Get bit offset of field. */
14280 if (handle_data_member_location (die
, cu
, &offset
))
14281 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14282 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14283 if (attr
!= nullptr)
14285 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
14287 /* For big endian bits, the DW_AT_bit_offset gives the
14288 additional bit offset from the MSB of the containing
14289 anonymous object to the MSB of the field. We don't
14290 have to do anything special since we don't need to
14291 know the size of the anonymous object. */
14292 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14296 /* For little endian bits, compute the bit offset to the
14297 MSB of the anonymous object, subtract off the number of
14298 bits from the MSB of the field to the MSB of the
14299 object, and then subtract off the number of bits of
14300 the field itself. The result is the bit offset of
14301 the LSB of the field. */
14302 int anonymous_size
;
14303 int bit_offset
= DW_UNSND (attr
);
14305 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14306 if (attr
!= nullptr)
14308 /* The size of the anonymous object containing
14309 the bit field is explicit, so use the
14310 indicated size (in bytes). */
14311 anonymous_size
= DW_UNSND (attr
);
14315 /* The size of the anonymous object containing
14316 the bit field must be inferred from the type
14317 attribute of the data member containing the
14319 anonymous_size
= TYPE_LENGTH (fp
->type
);
14321 SET_FIELD_BITPOS (*fp
,
14322 (FIELD_BITPOS (*fp
)
14323 + anonymous_size
* bits_per_byte
14324 - bit_offset
- FIELD_BITSIZE (*fp
)));
14327 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14329 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14330 + attr
->constant_value (0)));
14332 /* Get name of field. */
14333 fieldname
= dwarf2_name (die
, cu
);
14334 if (fieldname
== NULL
)
14337 /* The name is already allocated along with this objfile, so we don't
14338 need to duplicate it for the type. */
14339 fp
->name
= fieldname
;
14341 /* Change accessibility for artificial fields (e.g. virtual table
14342 pointer or virtual base class pointer) to private. */
14343 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14345 FIELD_ARTIFICIAL (*fp
) = 1;
14346 new_field
->accessibility
= DW_ACCESS_private
;
14347 fip
->non_public_fields
= 1;
14350 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14352 /* C++ static member. */
14354 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14355 is a declaration, but all versions of G++ as of this writing
14356 (so through at least 3.2.1) incorrectly generate
14357 DW_TAG_variable tags. */
14359 const char *physname
;
14361 /* Get name of field. */
14362 fieldname
= dwarf2_name (die
, cu
);
14363 if (fieldname
== NULL
)
14366 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14368 /* Only create a symbol if this is an external value.
14369 new_symbol checks this and puts the value in the global symbol
14370 table, which we want. If it is not external, new_symbol
14371 will try to put the value in cu->list_in_scope which is wrong. */
14372 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
14374 /* A static const member, not much different than an enum as far as
14375 we're concerned, except that we can support more types. */
14376 new_symbol (die
, NULL
, cu
);
14379 /* Get physical name. */
14380 physname
= dwarf2_physname (fieldname
, die
, cu
);
14382 /* The name is already allocated along with this objfile, so we don't
14383 need to duplicate it for the type. */
14384 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
14385 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14386 FIELD_NAME (*fp
) = fieldname
;
14388 else if (die
->tag
== DW_TAG_inheritance
)
14392 /* C++ base class field. */
14393 if (handle_data_member_location (die
, cu
, &offset
))
14394 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14395 FIELD_BITSIZE (*fp
) = 0;
14396 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14397 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
14400 gdb_assert_not_reached ("missing case in dwarf2_add_field");
14403 /* Can the type given by DIE define another type? */
14406 type_can_define_types (const struct die_info
*die
)
14410 case DW_TAG_typedef
:
14411 case DW_TAG_class_type
:
14412 case DW_TAG_structure_type
:
14413 case DW_TAG_union_type
:
14414 case DW_TAG_enumeration_type
:
14422 /* Add a type definition defined in the scope of the FIP's class. */
14425 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
14426 struct dwarf2_cu
*cu
)
14428 struct decl_field fp
;
14429 memset (&fp
, 0, sizeof (fp
));
14431 gdb_assert (type_can_define_types (die
));
14433 /* Get name of field. NULL is okay here, meaning an anonymous type. */
14434 fp
.name
= dwarf2_name (die
, cu
);
14435 fp
.type
= read_type_die (die
, cu
);
14437 /* Save accessibility. */
14438 enum dwarf_access_attribute accessibility
;
14439 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14441 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14443 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14444 switch (accessibility
)
14446 case DW_ACCESS_public
:
14447 /* The assumed value if neither private nor protected. */
14449 case DW_ACCESS_private
:
14452 case DW_ACCESS_protected
:
14453 fp
.is_protected
= 1;
14456 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14459 if (die
->tag
== DW_TAG_typedef
)
14460 fip
->typedef_field_list
.push_back (fp
);
14462 fip
->nested_types_list
.push_back (fp
);
14465 /* A convenience typedef that's used when finding the discriminant
14466 field for a variant part. */
14467 typedef std::unordered_map
<sect_offset
, int> offset_map_type
;
14469 /* Compute the discriminant range for a given variant. OBSTACK is
14470 where the results will be stored. VARIANT is the variant to
14471 process. IS_UNSIGNED indicates whether the discriminant is signed
14474 static const gdb::array_view
<discriminant_range
>
14475 convert_variant_range (struct obstack
*obstack
, const variant_field
&variant
,
14478 std::vector
<discriminant_range
> ranges
;
14480 if (variant
.default_branch
)
14483 if (variant
.discr_list_data
== nullptr)
14485 discriminant_range r
14486 = {variant
.discriminant_value
, variant
.discriminant_value
};
14487 ranges
.push_back (r
);
14491 gdb::array_view
<const gdb_byte
> data (variant
.discr_list_data
->data
,
14492 variant
.discr_list_data
->size
);
14493 while (!data
.empty ())
14495 if (data
[0] != DW_DSC_range
&& data
[0] != DW_DSC_label
)
14497 complaint (_("invalid discriminant marker: %d"), data
[0]);
14500 bool is_range
= data
[0] == DW_DSC_range
;
14501 data
= data
.slice (1);
14503 ULONGEST low
, high
;
14504 unsigned int bytes_read
;
14508 complaint (_("DW_AT_discr_list missing low value"));
14512 low
= read_unsigned_leb128 (nullptr, data
.data (), &bytes_read
);
14514 low
= (ULONGEST
) read_signed_leb128 (nullptr, data
.data (),
14516 data
= data
.slice (bytes_read
);
14522 complaint (_("DW_AT_discr_list missing high value"));
14526 high
= read_unsigned_leb128 (nullptr, data
.data (),
14529 high
= (LONGEST
) read_signed_leb128 (nullptr, data
.data (),
14531 data
= data
.slice (bytes_read
);
14536 ranges
.push_back ({ low
, high
});
14540 discriminant_range
*result
= XOBNEWVEC (obstack
, discriminant_range
,
14542 std::copy (ranges
.begin (), ranges
.end (), result
);
14543 return gdb::array_view
<discriminant_range
> (result
, ranges
.size ());
14546 static const gdb::array_view
<variant_part
> create_variant_parts
14547 (struct obstack
*obstack
,
14548 const offset_map_type
&offset_map
,
14549 struct field_info
*fi
,
14550 const std::vector
<variant_part_builder
> &variant_parts
);
14552 /* Fill in a "struct variant" for a given variant field. RESULT is
14553 the variant to fill in. OBSTACK is where any needed allocations
14554 will be done. OFFSET_MAP holds the mapping from section offsets to
14555 fields for the type. FI describes the fields of the type we're
14556 processing. FIELD is the variant field we're converting. */
14559 create_one_variant (variant
&result
, struct obstack
*obstack
,
14560 const offset_map_type
&offset_map
,
14561 struct field_info
*fi
, const variant_field
&field
)
14563 result
.discriminants
= convert_variant_range (obstack
, field
, false);
14564 result
.first_field
= field
.first_field
+ fi
->baseclasses
.size ();
14565 result
.last_field
= field
.last_field
+ fi
->baseclasses
.size ();
14566 result
.parts
= create_variant_parts (obstack
, offset_map
, fi
,
14567 field
.variant_parts
);
14570 /* Fill in a "struct variant_part" for a given variant part. RESULT
14571 is the variant part to fill in. OBSTACK is where any needed
14572 allocations will be done. OFFSET_MAP holds the mapping from
14573 section offsets to fields for the type. FI describes the fields of
14574 the type we're processing. BUILDER is the variant part to be
14578 create_one_variant_part (variant_part
&result
,
14579 struct obstack
*obstack
,
14580 const offset_map_type
&offset_map
,
14581 struct field_info
*fi
,
14582 const variant_part_builder
&builder
)
14584 auto iter
= offset_map
.find (builder
.discriminant_offset
);
14585 if (iter
== offset_map
.end ())
14587 result
.discriminant_index
= -1;
14588 /* Doesn't matter. */
14589 result
.is_unsigned
= false;
14593 result
.discriminant_index
= iter
->second
;
14595 = TYPE_UNSIGNED (FIELD_TYPE
14596 (fi
->fields
[result
.discriminant_index
].field
));
14599 size_t n
= builder
.variants
.size ();
14600 variant
*output
= new (obstack
) variant
[n
];
14601 for (size_t i
= 0; i
< n
; ++i
)
14602 create_one_variant (output
[i
], obstack
, offset_map
, fi
,
14603 builder
.variants
[i
]);
14605 result
.variants
= gdb::array_view
<variant
> (output
, n
);
14608 /* Create a vector of variant parts that can be attached to a type.
14609 OBSTACK is where any needed allocations will be done. OFFSET_MAP
14610 holds the mapping from section offsets to fields for the type. FI
14611 describes the fields of the type we're processing. VARIANT_PARTS
14612 is the vector to convert. */
14614 static const gdb::array_view
<variant_part
>
14615 create_variant_parts (struct obstack
*obstack
,
14616 const offset_map_type
&offset_map
,
14617 struct field_info
*fi
,
14618 const std::vector
<variant_part_builder
> &variant_parts
)
14620 if (variant_parts
.empty ())
14623 size_t n
= variant_parts
.size ();
14624 variant_part
*result
= new (obstack
) variant_part
[n
];
14625 for (size_t i
= 0; i
< n
; ++i
)
14626 create_one_variant_part (result
[i
], obstack
, offset_map
, fi
,
14629 return gdb::array_view
<variant_part
> (result
, n
);
14632 /* Compute the variant part vector for FIP, attaching it to TYPE when
14636 add_variant_property (struct field_info
*fip
, struct type
*type
,
14637 struct dwarf2_cu
*cu
)
14639 /* Map section offsets of fields to their field index. Note the
14640 field index here does not take the number of baseclasses into
14642 offset_map_type offset_map
;
14643 for (int i
= 0; i
< fip
->fields
.size (); ++i
)
14644 offset_map
[fip
->fields
[i
].offset
] = i
;
14646 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14647 gdb::array_view
<variant_part
> parts
14648 = create_variant_parts (&objfile
->objfile_obstack
, offset_map
, fip
,
14649 fip
->variant_parts
);
14651 struct dynamic_prop prop
;
14652 prop
.kind
= PROP_VARIANT_PARTS
;
14653 prop
.data
.variant_parts
14654 = ((gdb::array_view
<variant_part
> *)
14655 obstack_copy (&objfile
->objfile_obstack
, &parts
, sizeof (parts
)));
14657 add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
, type
);
14660 /* Create the vector of fields, and attach it to the type. */
14663 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14664 struct dwarf2_cu
*cu
)
14666 int nfields
= fip
->nfields ();
14668 /* Record the field count, allocate space for the array of fields,
14669 and create blank accessibility bitfields if necessary. */
14670 TYPE_NFIELDS (type
) = nfields
;
14671 TYPE_FIELDS (type
) = (struct field
*)
14672 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
14674 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14676 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14678 TYPE_FIELD_PRIVATE_BITS (type
) =
14679 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14680 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14682 TYPE_FIELD_PROTECTED_BITS (type
) =
14683 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14684 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14686 TYPE_FIELD_IGNORE_BITS (type
) =
14687 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14688 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14691 /* If the type has baseclasses, allocate and clear a bit vector for
14692 TYPE_FIELD_VIRTUAL_BITS. */
14693 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
14695 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
14696 unsigned char *pointer
;
14698 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14699 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14700 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14701 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
14702 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
14705 if (!fip
->variant_parts
.empty ())
14706 add_variant_property (fip
, type
, cu
);
14708 /* Copy the saved-up fields into the field vector. */
14709 for (int i
= 0; i
< nfields
; ++i
)
14711 struct nextfield
&field
14712 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
14713 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
14715 TYPE_FIELD (type
, i
) = field
.field
;
14716 switch (field
.accessibility
)
14718 case DW_ACCESS_private
:
14719 if (cu
->language
!= language_ada
)
14720 SET_TYPE_FIELD_PRIVATE (type
, i
);
14723 case DW_ACCESS_protected
:
14724 if (cu
->language
!= language_ada
)
14725 SET_TYPE_FIELD_PROTECTED (type
, i
);
14728 case DW_ACCESS_public
:
14732 /* Unknown accessibility. Complain and treat it as public. */
14734 complaint (_("unsupported accessibility %d"),
14735 field
.accessibility
);
14739 if (i
< fip
->baseclasses
.size ())
14741 switch (field
.virtuality
)
14743 case DW_VIRTUALITY_virtual
:
14744 case DW_VIRTUALITY_pure_virtual
:
14745 if (cu
->language
== language_ada
)
14746 error (_("unexpected virtuality in component of Ada type"));
14747 SET_TYPE_FIELD_VIRTUAL (type
, i
);
14754 /* Return true if this member function is a constructor, false
14758 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14760 const char *fieldname
;
14761 const char *type_name
;
14764 if (die
->parent
== NULL
)
14767 if (die
->parent
->tag
!= DW_TAG_structure_type
14768 && die
->parent
->tag
!= DW_TAG_union_type
14769 && die
->parent
->tag
!= DW_TAG_class_type
)
14772 fieldname
= dwarf2_name (die
, cu
);
14773 type_name
= dwarf2_name (die
->parent
, cu
);
14774 if (fieldname
== NULL
|| type_name
== NULL
)
14777 len
= strlen (fieldname
);
14778 return (strncmp (fieldname
, type_name
, len
) == 0
14779 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
14782 /* Check if the given VALUE is a recognized enum
14783 dwarf_defaulted_attribute constant according to DWARF5 spec,
14787 is_valid_DW_AT_defaulted (ULONGEST value
)
14791 case DW_DEFAULTED_no
:
14792 case DW_DEFAULTED_in_class
:
14793 case DW_DEFAULTED_out_of_class
:
14797 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
14801 /* Add a member function to the proper fieldlist. */
14804 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
14805 struct type
*type
, struct dwarf2_cu
*cu
)
14807 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14808 struct attribute
*attr
;
14810 struct fnfieldlist
*flp
= nullptr;
14811 struct fn_field
*fnp
;
14812 const char *fieldname
;
14813 struct type
*this_type
;
14814 enum dwarf_access_attribute accessibility
;
14816 if (cu
->language
== language_ada
)
14817 error (_("unexpected member function in Ada type"));
14819 /* Get name of member function. */
14820 fieldname
= dwarf2_name (die
, cu
);
14821 if (fieldname
== NULL
)
14824 /* Look up member function name in fieldlist. */
14825 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
14827 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
14829 flp
= &fip
->fnfieldlists
[i
];
14834 /* Create a new fnfieldlist if necessary. */
14835 if (flp
== nullptr)
14837 fip
->fnfieldlists
.emplace_back ();
14838 flp
= &fip
->fnfieldlists
.back ();
14839 flp
->name
= fieldname
;
14840 i
= fip
->fnfieldlists
.size () - 1;
14843 /* Create a new member function field and add it to the vector of
14845 flp
->fnfields
.emplace_back ();
14846 fnp
= &flp
->fnfields
.back ();
14848 /* Delay processing of the physname until later. */
14849 if (cu
->language
== language_cplus
)
14850 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
14854 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
14855 fnp
->physname
= physname
? physname
: "";
14858 fnp
->type
= alloc_type (objfile
);
14859 this_type
= read_type_die (die
, cu
);
14860 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
14862 int nparams
= TYPE_NFIELDS (this_type
);
14864 /* TYPE is the domain of this method, and THIS_TYPE is the type
14865 of the method itself (TYPE_CODE_METHOD). */
14866 smash_to_method_type (fnp
->type
, type
,
14867 TYPE_TARGET_TYPE (this_type
),
14868 TYPE_FIELDS (this_type
),
14869 TYPE_NFIELDS (this_type
),
14870 TYPE_VARARGS (this_type
));
14872 /* Handle static member functions.
14873 Dwarf2 has no clean way to discern C++ static and non-static
14874 member functions. G++ helps GDB by marking the first
14875 parameter for non-static member functions (which is the this
14876 pointer) as artificial. We obtain this information from
14877 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
14878 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
14879 fnp
->voffset
= VOFFSET_STATIC
;
14882 complaint (_("member function type missing for '%s'"),
14883 dwarf2_full_name (fieldname
, die
, cu
));
14885 /* Get fcontext from DW_AT_containing_type if present. */
14886 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
14887 fnp
->fcontext
= die_containing_type (die
, cu
);
14889 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
14890 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
14892 /* Get accessibility. */
14893 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14894 if (attr
!= nullptr)
14895 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14897 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14898 switch (accessibility
)
14900 case DW_ACCESS_private
:
14901 fnp
->is_private
= 1;
14903 case DW_ACCESS_protected
:
14904 fnp
->is_protected
= 1;
14908 /* Check for artificial methods. */
14909 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
14910 if (attr
&& DW_UNSND (attr
) != 0)
14911 fnp
->is_artificial
= 1;
14913 /* Check for defaulted methods. */
14914 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
14915 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
14916 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
14918 /* Check for deleted methods. */
14919 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
14920 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
14921 fnp
->is_deleted
= 1;
14923 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
14925 /* Get index in virtual function table if it is a virtual member
14926 function. For older versions of GCC, this is an offset in the
14927 appropriate virtual table, as specified by DW_AT_containing_type.
14928 For everyone else, it is an expression to be evaluated relative
14929 to the object address. */
14931 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
14932 if (attr
!= nullptr)
14934 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
> 0)
14936 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
14938 /* Old-style GCC. */
14939 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
14941 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
14942 || (DW_BLOCK (attr
)->size
> 1
14943 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
14944 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
14946 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14947 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
14948 dwarf2_complex_location_expr_complaint ();
14950 fnp
->voffset
/= cu
->header
.addr_size
;
14954 dwarf2_complex_location_expr_complaint ();
14956 if (!fnp
->fcontext
)
14958 /* If there is no `this' field and no DW_AT_containing_type,
14959 we cannot actually find a base class context for the
14961 if (TYPE_NFIELDS (this_type
) == 0
14962 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
14964 complaint (_("cannot determine context for virtual member "
14965 "function \"%s\" (offset %s)"),
14966 fieldname
, sect_offset_str (die
->sect_off
));
14971 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
14975 else if (attr
->form_is_section_offset ())
14977 dwarf2_complex_location_expr_complaint ();
14981 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
14987 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14988 if (attr
&& DW_UNSND (attr
))
14990 /* GCC does this, as of 2008-08-25; PR debug/37237. */
14991 complaint (_("Member function \"%s\" (offset %s) is virtual "
14992 "but the vtable offset is not specified"),
14993 fieldname
, sect_offset_str (die
->sect_off
));
14994 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14995 TYPE_CPLUS_DYNAMIC (type
) = 1;
15000 /* Create the vector of member function fields, and attach it to the type. */
15003 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15004 struct dwarf2_cu
*cu
)
15006 if (cu
->language
== language_ada
)
15007 error (_("unexpected member functions in Ada type"));
15009 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15010 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15012 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15014 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15016 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15017 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15019 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15020 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15021 fn_flp
->fn_fields
= (struct fn_field
*)
15022 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15024 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15025 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15028 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15031 /* Returns non-zero if NAME is the name of a vtable member in CU's
15032 language, zero otherwise. */
15034 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15036 static const char vptr
[] = "_vptr";
15038 /* Look for the C++ form of the vtable. */
15039 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15045 /* GCC outputs unnamed structures that are really pointers to member
15046 functions, with the ABI-specified layout. If TYPE describes
15047 such a structure, smash it into a member function type.
15049 GCC shouldn't do this; it should just output pointer to member DIEs.
15050 This is GCC PR debug/28767. */
15053 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15055 struct type
*pfn_type
, *self_type
, *new_type
;
15057 /* Check for a structure with no name and two children. */
15058 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15061 /* Check for __pfn and __delta members. */
15062 if (TYPE_FIELD_NAME (type
, 0) == NULL
15063 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15064 || TYPE_FIELD_NAME (type
, 1) == NULL
15065 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15068 /* Find the type of the method. */
15069 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15070 if (pfn_type
== NULL
15071 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15072 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15075 /* Look for the "this" argument. */
15076 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15077 if (TYPE_NFIELDS (pfn_type
) == 0
15078 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15079 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15082 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15083 new_type
= alloc_type (objfile
);
15084 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15085 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15086 TYPE_VARARGS (pfn_type
));
15087 smash_to_methodptr_type (type
, new_type
);
15090 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15091 appropriate error checking and issuing complaints if there is a
15095 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15097 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15099 if (attr
== nullptr)
15102 if (!attr
->form_is_constant ())
15104 complaint (_("DW_AT_alignment must have constant form"
15105 " - DIE at %s [in module %s]"),
15106 sect_offset_str (die
->sect_off
),
15107 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15112 if (attr
->form
== DW_FORM_sdata
)
15114 LONGEST val
= DW_SND (attr
);
15117 complaint (_("DW_AT_alignment value must not be negative"
15118 " - DIE at %s [in module %s]"),
15119 sect_offset_str (die
->sect_off
),
15120 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15126 align
= DW_UNSND (attr
);
15130 complaint (_("DW_AT_alignment value must not be zero"
15131 " - DIE at %s [in module %s]"),
15132 sect_offset_str (die
->sect_off
),
15133 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15136 if ((align
& (align
- 1)) != 0)
15138 complaint (_("DW_AT_alignment value must be a power of 2"
15139 " - DIE at %s [in module %s]"),
15140 sect_offset_str (die
->sect_off
),
15141 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15148 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15149 the alignment for TYPE. */
15152 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15155 if (!set_type_align (type
, get_alignment (cu
, die
)))
15156 complaint (_("DW_AT_alignment value too large"
15157 " - DIE at %s [in module %s]"),
15158 sect_offset_str (die
->sect_off
),
15159 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15162 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15163 constant for a type, according to DWARF5 spec, Table 5.5. */
15166 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
15171 case DW_CC_pass_by_reference
:
15172 case DW_CC_pass_by_value
:
15176 complaint (_("unrecognized DW_AT_calling_convention value "
15177 "(%s) for a type"), pulongest (value
));
15182 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15183 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
15184 also according to GNU-specific values (see include/dwarf2.h). */
15187 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15192 case DW_CC_program
:
15196 case DW_CC_GNU_renesas_sh
:
15197 case DW_CC_GNU_borland_fastcall_i386
:
15198 case DW_CC_GDB_IBM_OpenCL
:
15202 complaint (_("unrecognized DW_AT_calling_convention value "
15203 "(%s) for a subroutine"), pulongest (value
));
15208 /* Called when we find the DIE that starts a structure or union scope
15209 (definition) to create a type for the structure or union. Fill in
15210 the type's name and general properties; the members will not be
15211 processed until process_structure_scope. A symbol table entry for
15212 the type will also not be done until process_structure_scope (assuming
15213 the type has a name).
15215 NOTE: we need to call these functions regardless of whether or not the
15216 DIE has a DW_AT_name attribute, since it might be an anonymous
15217 structure or union. This gets the type entered into our set of
15218 user defined types. */
15220 static struct type
*
15221 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15223 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15225 struct attribute
*attr
;
15228 /* If the definition of this type lives in .debug_types, read that type.
15229 Don't follow DW_AT_specification though, that will take us back up
15230 the chain and we want to go down. */
15231 attr
= die
->attr (DW_AT_signature
);
15232 if (attr
!= nullptr)
15234 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15236 /* The type's CU may not be the same as CU.
15237 Ensure TYPE is recorded with CU in die_type_hash. */
15238 return set_die_type (die
, type
, cu
);
15241 type
= alloc_type (objfile
);
15242 INIT_CPLUS_SPECIFIC (type
);
15244 name
= dwarf2_name (die
, cu
);
15247 if (cu
->language
== language_cplus
15248 || cu
->language
== language_d
15249 || cu
->language
== language_rust
)
15251 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15253 /* dwarf2_full_name might have already finished building the DIE's
15254 type. If so, there is no need to continue. */
15255 if (get_die_type (die
, cu
) != NULL
)
15256 return get_die_type (die
, cu
);
15258 TYPE_NAME (type
) = full_name
;
15262 /* The name is already allocated along with this objfile, so
15263 we don't need to duplicate it for the type. */
15264 TYPE_NAME (type
) = name
;
15268 if (die
->tag
== DW_TAG_structure_type
)
15270 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15272 else if (die
->tag
== DW_TAG_union_type
)
15274 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15278 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15281 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15282 TYPE_DECLARED_CLASS (type
) = 1;
15284 /* Store the calling convention in the type if it's available in
15285 the die. Otherwise the calling convention remains set to
15286 the default value DW_CC_normal. */
15287 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15288 if (attr
!= nullptr
15289 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
15291 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15292 TYPE_CPLUS_CALLING_CONVENTION (type
)
15293 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
15296 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15297 if (attr
!= nullptr)
15299 if (attr
->form_is_constant ())
15300 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15303 struct dynamic_prop prop
;
15304 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
15305 cu
->per_cu
->addr_type ()))
15306 add_dyn_prop (DYN_PROP_BYTE_SIZE
, prop
, type
);
15307 TYPE_LENGTH (type
) = 0;
15312 TYPE_LENGTH (type
) = 0;
15315 maybe_set_alignment (cu
, die
, type
);
15317 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15319 /* ICC<14 does not output the required DW_AT_declaration on
15320 incomplete types, but gives them a size of zero. */
15321 TYPE_STUB (type
) = 1;
15324 TYPE_STUB_SUPPORTED (type
) = 1;
15326 if (die_is_declaration (die
, cu
))
15327 TYPE_STUB (type
) = 1;
15328 else if (attr
== NULL
&& die
->child
== NULL
15329 && producer_is_realview (cu
->producer
))
15330 /* RealView does not output the required DW_AT_declaration
15331 on incomplete types. */
15332 TYPE_STUB (type
) = 1;
15334 /* We need to add the type field to the die immediately so we don't
15335 infinitely recurse when dealing with pointers to the structure
15336 type within the structure itself. */
15337 set_die_type (die
, type
, cu
);
15339 /* set_die_type should be already done. */
15340 set_descriptive_type (type
, die
, cu
);
15345 static void handle_struct_member_die
15346 (struct die_info
*child_die
,
15348 struct field_info
*fi
,
15349 std::vector
<struct symbol
*> *template_args
,
15350 struct dwarf2_cu
*cu
);
15352 /* A helper for handle_struct_member_die that handles
15353 DW_TAG_variant_part. */
15356 handle_variant_part (struct die_info
*die
, struct type
*type
,
15357 struct field_info
*fi
,
15358 std::vector
<struct symbol
*> *template_args
,
15359 struct dwarf2_cu
*cu
)
15361 variant_part_builder
*new_part
;
15362 if (fi
->current_variant_part
== nullptr)
15364 fi
->variant_parts
.emplace_back ();
15365 new_part
= &fi
->variant_parts
.back ();
15367 else if (!fi
->current_variant_part
->processing_variant
)
15369 complaint (_("nested DW_TAG_variant_part seen "
15370 "- DIE at %s [in module %s]"),
15371 sect_offset_str (die
->sect_off
),
15372 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15377 variant_field
¤t
= fi
->current_variant_part
->variants
.back ();
15378 current
.variant_parts
.emplace_back ();
15379 new_part
= ¤t
.variant_parts
.back ();
15382 /* When we recurse, we want callees to add to this new variant
15384 scoped_restore save_current_variant_part
15385 = make_scoped_restore (&fi
->current_variant_part
, new_part
);
15387 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15390 /* It's a univariant form, an extension we support. */
15392 else if (discr
->form_is_ref ())
15394 struct dwarf2_cu
*target_cu
= cu
;
15395 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15397 new_part
->discriminant_offset
= target_die
->sect_off
;
15401 complaint (_("DW_AT_discr does not have DIE reference form"
15402 " - DIE at %s [in module %s]"),
15403 sect_offset_str (die
->sect_off
),
15404 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15407 for (die_info
*child_die
= die
->child
;
15409 child_die
= child_die
->sibling
)
15410 handle_struct_member_die (child_die
, type
, fi
, template_args
, cu
);
15413 /* A helper for handle_struct_member_die that handles
15417 handle_variant (struct die_info
*die
, struct type
*type
,
15418 struct field_info
*fi
,
15419 std::vector
<struct symbol
*> *template_args
,
15420 struct dwarf2_cu
*cu
)
15422 if (fi
->current_variant_part
== nullptr)
15424 complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part "
15425 "- DIE at %s [in module %s]"),
15426 sect_offset_str (die
->sect_off
),
15427 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15430 if (fi
->current_variant_part
->processing_variant
)
15432 complaint (_("nested DW_TAG_variant seen "
15433 "- DIE at %s [in module %s]"),
15434 sect_offset_str (die
->sect_off
),
15435 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15439 scoped_restore save_processing_variant
15440 = make_scoped_restore (&fi
->current_variant_part
->processing_variant
,
15443 fi
->current_variant_part
->variants
.emplace_back ();
15444 variant_field
&variant
= fi
->current_variant_part
->variants
.back ();
15445 variant
.first_field
= fi
->fields
.size ();
15447 /* In a variant we want to get the discriminant and also add a
15448 field for our sole member child. */
15449 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr_value
, cu
);
15450 if (discr
== nullptr)
15452 discr
= dwarf2_attr (die
, DW_AT_discr_list
, cu
);
15453 if (discr
== nullptr || DW_BLOCK (discr
)->size
== 0)
15454 variant
.default_branch
= true;
15456 variant
.discr_list_data
= DW_BLOCK (discr
);
15459 variant
.discriminant_value
= DW_UNSND (discr
);
15461 for (die_info
*variant_child
= die
->child
;
15462 variant_child
!= NULL
;
15463 variant_child
= variant_child
->sibling
)
15464 handle_struct_member_die (variant_child
, type
, fi
, template_args
, cu
);
15466 variant
.last_field
= fi
->fields
.size ();
15469 /* A helper for process_structure_scope that handles a single member
15473 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15474 struct field_info
*fi
,
15475 std::vector
<struct symbol
*> *template_args
,
15476 struct dwarf2_cu
*cu
)
15478 if (child_die
->tag
== DW_TAG_member
15479 || child_die
->tag
== DW_TAG_variable
)
15481 /* NOTE: carlton/2002-11-05: A C++ static data member
15482 should be a DW_TAG_member that is a declaration, but
15483 all versions of G++ as of this writing (so through at
15484 least 3.2.1) incorrectly generate DW_TAG_variable
15485 tags for them instead. */
15486 dwarf2_add_field (fi
, child_die
, cu
);
15488 else if (child_die
->tag
== DW_TAG_subprogram
)
15490 /* Rust doesn't have member functions in the C++ sense.
15491 However, it does emit ordinary functions as children
15492 of a struct DIE. */
15493 if (cu
->language
== language_rust
)
15494 read_func_scope (child_die
, cu
);
15497 /* C++ member function. */
15498 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15501 else if (child_die
->tag
== DW_TAG_inheritance
)
15503 /* C++ base class field. */
15504 dwarf2_add_field (fi
, child_die
, cu
);
15506 else if (type_can_define_types (child_die
))
15507 dwarf2_add_type_defn (fi
, child_die
, cu
);
15508 else if (child_die
->tag
== DW_TAG_template_type_param
15509 || child_die
->tag
== DW_TAG_template_value_param
)
15511 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15514 template_args
->push_back (arg
);
15516 else if (child_die
->tag
== DW_TAG_variant_part
)
15517 handle_variant_part (child_die
, type
, fi
, template_args
, cu
);
15518 else if (child_die
->tag
== DW_TAG_variant
)
15519 handle_variant (child_die
, type
, fi
, template_args
, cu
);
15522 /* Finish creating a structure or union type, including filling in
15523 its members and creating a symbol for it. */
15526 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15528 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15529 struct die_info
*child_die
;
15532 type
= get_die_type (die
, cu
);
15534 type
= read_structure_type (die
, cu
);
15536 bool has_template_parameters
= false;
15537 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15539 struct field_info fi
;
15540 std::vector
<struct symbol
*> template_args
;
15542 child_die
= die
->child
;
15544 while (child_die
&& child_die
->tag
)
15546 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15547 child_die
= child_die
->sibling
;
15550 /* Attach template arguments to type. */
15551 if (!template_args
.empty ())
15553 has_template_parameters
= true;
15554 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15555 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15556 TYPE_TEMPLATE_ARGUMENTS (type
)
15557 = XOBNEWVEC (&objfile
->objfile_obstack
,
15559 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15560 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15561 template_args
.data (),
15562 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15563 * sizeof (struct symbol
*)));
15566 /* Attach fields and member functions to the type. */
15567 if (fi
.nfields () > 0)
15568 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15569 if (!fi
.fnfieldlists
.empty ())
15571 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15573 /* Get the type which refers to the base class (possibly this
15574 class itself) which contains the vtable pointer for the current
15575 class from the DW_AT_containing_type attribute. This use of
15576 DW_AT_containing_type is a GNU extension. */
15578 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15580 struct type
*t
= die_containing_type (die
, cu
);
15582 set_type_vptr_basetype (type
, t
);
15587 /* Our own class provides vtbl ptr. */
15588 for (i
= TYPE_NFIELDS (t
) - 1;
15589 i
>= TYPE_N_BASECLASSES (t
);
15592 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15594 if (is_vtable_name (fieldname
, cu
))
15596 set_type_vptr_fieldno (type
, i
);
15601 /* Complain if virtual function table field not found. */
15602 if (i
< TYPE_N_BASECLASSES (t
))
15603 complaint (_("virtual function table pointer "
15604 "not found when defining class '%s'"),
15605 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
15609 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15612 else if (cu
->producer
15613 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15615 /* The IBM XLC compiler does not provide direct indication
15616 of the containing type, but the vtable pointer is
15617 always named __vfp. */
15621 for (i
= TYPE_NFIELDS (type
) - 1;
15622 i
>= TYPE_N_BASECLASSES (type
);
15625 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15627 set_type_vptr_fieldno (type
, i
);
15628 set_type_vptr_basetype (type
, type
);
15635 /* Copy fi.typedef_field_list linked list elements content into the
15636 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15637 if (!fi
.typedef_field_list
.empty ())
15639 int count
= fi
.typedef_field_list
.size ();
15641 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15642 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15643 = ((struct decl_field
*)
15645 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15646 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15648 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15649 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15652 /* Copy fi.nested_types_list linked list elements content into the
15653 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15654 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15656 int count
= fi
.nested_types_list
.size ();
15658 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15659 TYPE_NESTED_TYPES_ARRAY (type
)
15660 = ((struct decl_field
*)
15661 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15662 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15664 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15665 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15669 quirk_gcc_member_function_pointer (type
, objfile
);
15670 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15671 cu
->rust_unions
.push_back (type
);
15673 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15674 snapshots) has been known to create a die giving a declaration
15675 for a class that has, as a child, a die giving a definition for a
15676 nested class. So we have to process our children even if the
15677 current die is a declaration. Normally, of course, a declaration
15678 won't have any children at all. */
15680 child_die
= die
->child
;
15682 while (child_die
!= NULL
&& child_die
->tag
)
15684 if (child_die
->tag
== DW_TAG_member
15685 || child_die
->tag
== DW_TAG_variable
15686 || child_die
->tag
== DW_TAG_inheritance
15687 || child_die
->tag
== DW_TAG_template_value_param
15688 || child_die
->tag
== DW_TAG_template_type_param
)
15693 process_die (child_die
, cu
);
15695 child_die
= child_die
->sibling
;
15698 /* Do not consider external references. According to the DWARF standard,
15699 these DIEs are identified by the fact that they have no byte_size
15700 attribute, and a declaration attribute. */
15701 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
15702 || !die_is_declaration (die
, cu
))
15704 struct symbol
*sym
= new_symbol (die
, type
, cu
);
15706 if (has_template_parameters
)
15708 struct symtab
*symtab
;
15709 if (sym
!= nullptr)
15710 symtab
= symbol_symtab (sym
);
15711 else if (cu
->line_header
!= nullptr)
15713 /* Any related symtab will do. */
15715 = cu
->line_header
->file_names ()[0].symtab
;
15720 complaint (_("could not find suitable "
15721 "symtab for template parameter"
15722 " - DIE at %s [in module %s]"),
15723 sect_offset_str (die
->sect_off
),
15724 objfile_name (objfile
));
15727 if (symtab
!= nullptr)
15729 /* Make sure that the symtab is set on the new symbols.
15730 Even though they don't appear in this symtab directly,
15731 other parts of gdb assume that symbols do, and this is
15732 reasonably true. */
15733 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
15734 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
15740 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
15741 update TYPE using some information only available in DIE's children. */
15744 update_enumeration_type_from_children (struct die_info
*die
,
15746 struct dwarf2_cu
*cu
)
15748 struct die_info
*child_die
;
15749 int unsigned_enum
= 1;
15752 auto_obstack obstack
;
15754 for (child_die
= die
->child
;
15755 child_die
!= NULL
&& child_die
->tag
;
15756 child_die
= child_die
->sibling
)
15758 struct attribute
*attr
;
15760 const gdb_byte
*bytes
;
15761 struct dwarf2_locexpr_baton
*baton
;
15764 if (child_die
->tag
!= DW_TAG_enumerator
)
15767 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
15771 name
= dwarf2_name (child_die
, cu
);
15773 name
= "<anonymous enumerator>";
15775 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
15776 &value
, &bytes
, &baton
);
15784 if (count_one_bits_ll (value
) >= 2)
15788 /* If we already know that the enum type is neither unsigned, nor
15789 a flag type, no need to look at the rest of the enumerates. */
15790 if (!unsigned_enum
&& !flag_enum
)
15795 TYPE_UNSIGNED (type
) = 1;
15797 TYPE_FLAG_ENUM (type
) = 1;
15800 /* Given a DW_AT_enumeration_type die, set its type. We do not
15801 complete the type's fields yet, or create any symbols. */
15803 static struct type
*
15804 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15806 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15808 struct attribute
*attr
;
15811 /* If the definition of this type lives in .debug_types, read that type.
15812 Don't follow DW_AT_specification though, that will take us back up
15813 the chain and we want to go down. */
15814 attr
= die
->attr (DW_AT_signature
);
15815 if (attr
!= nullptr)
15817 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15819 /* The type's CU may not be the same as CU.
15820 Ensure TYPE is recorded with CU in die_type_hash. */
15821 return set_die_type (die
, type
, cu
);
15824 type
= alloc_type (objfile
);
15826 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
15827 name
= dwarf2_full_name (NULL
, die
, cu
);
15829 TYPE_NAME (type
) = name
;
15831 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
15834 struct type
*underlying_type
= die_type (die
, cu
);
15836 TYPE_TARGET_TYPE (type
) = underlying_type
;
15839 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15840 if (attr
!= nullptr)
15842 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15846 TYPE_LENGTH (type
) = 0;
15849 maybe_set_alignment (cu
, die
, type
);
15851 /* The enumeration DIE can be incomplete. In Ada, any type can be
15852 declared as private in the package spec, and then defined only
15853 inside the package body. Such types are known as Taft Amendment
15854 Types. When another package uses such a type, an incomplete DIE
15855 may be generated by the compiler. */
15856 if (die_is_declaration (die
, cu
))
15857 TYPE_STUB (type
) = 1;
15859 /* Finish the creation of this type by using the enum's children.
15860 We must call this even when the underlying type has been provided
15861 so that we can determine if we're looking at a "flag" enum. */
15862 update_enumeration_type_from_children (die
, type
, cu
);
15864 /* If this type has an underlying type that is not a stub, then we
15865 may use its attributes. We always use the "unsigned" attribute
15866 in this situation, because ordinarily we guess whether the type
15867 is unsigned -- but the guess can be wrong and the underlying type
15868 can tell us the reality. However, we defer to a local size
15869 attribute if one exists, because this lets the compiler override
15870 the underlying type if needed. */
15871 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
15873 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
15874 underlying_type
= check_typedef (underlying_type
);
15875 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (underlying_type
);
15876 if (TYPE_LENGTH (type
) == 0)
15877 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
15878 if (TYPE_RAW_ALIGN (type
) == 0
15879 && TYPE_RAW_ALIGN (underlying_type
) != 0)
15880 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
15883 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
15885 return set_die_type (die
, type
, cu
);
15888 /* Given a pointer to a die which begins an enumeration, process all
15889 the dies that define the members of the enumeration, and create the
15890 symbol for the enumeration type.
15892 NOTE: We reverse the order of the element list. */
15895 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15897 struct type
*this_type
;
15899 this_type
= get_die_type (die
, cu
);
15900 if (this_type
== NULL
)
15901 this_type
= read_enumeration_type (die
, cu
);
15903 if (die
->child
!= NULL
)
15905 struct die_info
*child_die
;
15906 struct symbol
*sym
;
15907 std::vector
<struct field
> fields
;
15910 child_die
= die
->child
;
15911 while (child_die
&& child_die
->tag
)
15913 if (child_die
->tag
!= DW_TAG_enumerator
)
15915 process_die (child_die
, cu
);
15919 name
= dwarf2_name (child_die
, cu
);
15922 sym
= new_symbol (child_die
, this_type
, cu
);
15924 fields
.emplace_back ();
15925 struct field
&field
= fields
.back ();
15927 FIELD_NAME (field
) = sym
->linkage_name ();
15928 FIELD_TYPE (field
) = NULL
;
15929 SET_FIELD_ENUMVAL (field
, SYMBOL_VALUE (sym
));
15930 FIELD_BITSIZE (field
) = 0;
15934 child_die
= child_die
->sibling
;
15937 if (!fields
.empty ())
15939 TYPE_NFIELDS (this_type
) = fields
.size ();
15940 TYPE_FIELDS (this_type
) = (struct field
*)
15941 TYPE_ALLOC (this_type
, sizeof (struct field
) * fields
.size ());
15942 memcpy (TYPE_FIELDS (this_type
), fields
.data (),
15943 sizeof (struct field
) * fields
.size ());
15947 /* If we are reading an enum from a .debug_types unit, and the enum
15948 is a declaration, and the enum is not the signatured type in the
15949 unit, then we do not want to add a symbol for it. Adding a
15950 symbol would in some cases obscure the true definition of the
15951 enum, giving users an incomplete type when the definition is
15952 actually available. Note that we do not want to do this for all
15953 enums which are just declarations, because C++0x allows forward
15954 enum declarations. */
15955 if (cu
->per_cu
->is_debug_types
15956 && die_is_declaration (die
, cu
))
15958 struct signatured_type
*sig_type
;
15960 sig_type
= (struct signatured_type
*) cu
->per_cu
;
15961 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
15962 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
15966 new_symbol (die
, this_type
, cu
);
15969 /* Extract all information from a DW_TAG_array_type DIE and put it in
15970 the DIE's type field. For now, this only handles one dimensional
15973 static struct type
*
15974 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15976 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15977 struct die_info
*child_die
;
15979 struct type
*element_type
, *range_type
, *index_type
;
15980 struct attribute
*attr
;
15982 struct dynamic_prop
*byte_stride_prop
= NULL
;
15983 unsigned int bit_stride
= 0;
15985 element_type
= die_type (die
, cu
);
15987 /* The die_type call above may have already set the type for this DIE. */
15988 type
= get_die_type (die
, cu
);
15992 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
15996 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
15999 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16000 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16004 complaint (_("unable to read array DW_AT_byte_stride "
16005 " - DIE at %s [in module %s]"),
16006 sect_offset_str (die
->sect_off
),
16007 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16008 /* Ignore this attribute. We will likely not be able to print
16009 arrays of this type correctly, but there is little we can do
16010 to help if we cannot read the attribute's value. */
16011 byte_stride_prop
= NULL
;
16015 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16017 bit_stride
= DW_UNSND (attr
);
16019 /* Irix 6.2 native cc creates array types without children for
16020 arrays with unspecified length. */
16021 if (die
->child
== NULL
)
16023 index_type
= objfile_type (objfile
)->builtin_int
;
16024 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16025 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16026 byte_stride_prop
, bit_stride
);
16027 return set_die_type (die
, type
, cu
);
16030 std::vector
<struct type
*> range_types
;
16031 child_die
= die
->child
;
16032 while (child_die
&& child_die
->tag
)
16034 if (child_die
->tag
== DW_TAG_subrange_type
)
16036 struct type
*child_type
= read_type_die (child_die
, cu
);
16038 if (child_type
!= NULL
)
16040 /* The range type was succesfully read. Save it for the
16041 array type creation. */
16042 range_types
.push_back (child_type
);
16045 child_die
= child_die
->sibling
;
16048 /* Dwarf2 dimensions are output from left to right, create the
16049 necessary array types in backwards order. */
16051 type
= element_type
;
16053 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16057 while (i
< range_types
.size ())
16058 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16059 byte_stride_prop
, bit_stride
);
16063 size_t ndim
= range_types
.size ();
16065 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16066 byte_stride_prop
, bit_stride
);
16069 /* Understand Dwarf2 support for vector types (like they occur on
16070 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16071 array type. This is not part of the Dwarf2/3 standard yet, but a
16072 custom vendor extension. The main difference between a regular
16073 array and the vector variant is that vectors are passed by value
16075 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16076 if (attr
!= nullptr)
16077 make_vector_type (type
);
16079 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16080 implementation may choose to implement triple vectors using this
16082 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16083 if (attr
!= nullptr)
16085 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16086 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16088 complaint (_("DW_AT_byte_size for array type smaller "
16089 "than the total size of elements"));
16092 name
= dwarf2_name (die
, cu
);
16094 TYPE_NAME (type
) = name
;
16096 maybe_set_alignment (cu
, die
, type
);
16098 /* Install the type in the die. */
16099 set_die_type (die
, type
, cu
);
16101 /* set_die_type should be already done. */
16102 set_descriptive_type (type
, die
, cu
);
16107 static enum dwarf_array_dim_ordering
16108 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16110 struct attribute
*attr
;
16112 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16114 if (attr
!= nullptr)
16115 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16117 /* GNU F77 is a special case, as at 08/2004 array type info is the
16118 opposite order to the dwarf2 specification, but data is still
16119 laid out as per normal fortran.
16121 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16122 version checking. */
16124 if (cu
->language
== language_fortran
16125 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16127 return DW_ORD_row_major
;
16130 switch (cu
->language_defn
->la_array_ordering
)
16132 case array_column_major
:
16133 return DW_ORD_col_major
;
16134 case array_row_major
:
16136 return DW_ORD_row_major
;
16140 /* Extract all information from a DW_TAG_set_type DIE and put it in
16141 the DIE's type field. */
16143 static struct type
*
16144 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16146 struct type
*domain_type
, *set_type
;
16147 struct attribute
*attr
;
16149 domain_type
= die_type (die
, cu
);
16151 /* The die_type call above may have already set the type for this DIE. */
16152 set_type
= get_die_type (die
, cu
);
16156 set_type
= create_set_type (NULL
, domain_type
);
16158 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16159 if (attr
!= nullptr)
16160 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16162 maybe_set_alignment (cu
, die
, set_type
);
16164 return set_die_type (die
, set_type
, cu
);
16167 /* A helper for read_common_block that creates a locexpr baton.
16168 SYM is the symbol which we are marking as computed.
16169 COMMON_DIE is the DIE for the common block.
16170 COMMON_LOC is the location expression attribute for the common
16172 MEMBER_LOC is the location expression attribute for the particular
16173 member of the common block that we are processing.
16174 CU is the CU from which the above come. */
16177 mark_common_block_symbol_computed (struct symbol
*sym
,
16178 struct die_info
*common_die
,
16179 struct attribute
*common_loc
,
16180 struct attribute
*member_loc
,
16181 struct dwarf2_cu
*cu
)
16183 struct dwarf2_per_objfile
*dwarf2_per_objfile
16184 = cu
->per_cu
->dwarf2_per_objfile
;
16185 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16186 struct dwarf2_locexpr_baton
*baton
;
16188 unsigned int cu_off
;
16189 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
16190 LONGEST offset
= 0;
16192 gdb_assert (common_loc
&& member_loc
);
16193 gdb_assert (common_loc
->form_is_block ());
16194 gdb_assert (member_loc
->form_is_block ()
16195 || member_loc
->form_is_constant ());
16197 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16198 baton
->per_cu
= cu
->per_cu
;
16199 gdb_assert (baton
->per_cu
);
16201 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16203 if (member_loc
->form_is_constant ())
16205 offset
= member_loc
->constant_value (0);
16206 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16209 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16211 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16214 *ptr
++ = DW_OP_call4
;
16215 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16216 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16219 if (member_loc
->form_is_constant ())
16221 *ptr
++ = DW_OP_addr
;
16222 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16223 ptr
+= cu
->header
.addr_size
;
16227 /* We have to copy the data here, because DW_OP_call4 will only
16228 use a DW_AT_location attribute. */
16229 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16230 ptr
+= DW_BLOCK (member_loc
)->size
;
16233 *ptr
++ = DW_OP_plus
;
16234 gdb_assert (ptr
- baton
->data
== baton
->size
);
16236 SYMBOL_LOCATION_BATON (sym
) = baton
;
16237 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16240 /* Create appropriate locally-scoped variables for all the
16241 DW_TAG_common_block entries. Also create a struct common_block
16242 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16243 is used to separate the common blocks name namespace from regular
16247 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16249 struct attribute
*attr
;
16251 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16252 if (attr
!= nullptr)
16254 /* Support the .debug_loc offsets. */
16255 if (attr
->form_is_block ())
16259 else if (attr
->form_is_section_offset ())
16261 dwarf2_complex_location_expr_complaint ();
16266 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16267 "common block member");
16272 if (die
->child
!= NULL
)
16274 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16275 struct die_info
*child_die
;
16276 size_t n_entries
= 0, size
;
16277 struct common_block
*common_block
;
16278 struct symbol
*sym
;
16280 for (child_die
= die
->child
;
16281 child_die
&& child_die
->tag
;
16282 child_die
= child_die
->sibling
)
16285 size
= (sizeof (struct common_block
)
16286 + (n_entries
- 1) * sizeof (struct symbol
*));
16288 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16290 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16291 common_block
->n_entries
= 0;
16293 for (child_die
= die
->child
;
16294 child_die
&& child_die
->tag
;
16295 child_die
= child_die
->sibling
)
16297 /* Create the symbol in the DW_TAG_common_block block in the current
16299 sym
= new_symbol (child_die
, NULL
, cu
);
16302 struct attribute
*member_loc
;
16304 common_block
->contents
[common_block
->n_entries
++] = sym
;
16306 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16310 /* GDB has handled this for a long time, but it is
16311 not specified by DWARF. It seems to have been
16312 emitted by gfortran at least as recently as:
16313 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16314 complaint (_("Variable in common block has "
16315 "DW_AT_data_member_location "
16316 "- DIE at %s [in module %s]"),
16317 sect_offset_str (child_die
->sect_off
),
16318 objfile_name (objfile
));
16320 if (member_loc
->form_is_section_offset ())
16321 dwarf2_complex_location_expr_complaint ();
16322 else if (member_loc
->form_is_constant ()
16323 || member_loc
->form_is_block ())
16325 if (attr
!= nullptr)
16326 mark_common_block_symbol_computed (sym
, die
, attr
,
16330 dwarf2_complex_location_expr_complaint ();
16335 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16336 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16340 /* Create a type for a C++ namespace. */
16342 static struct type
*
16343 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16345 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16346 const char *previous_prefix
, *name
;
16350 /* For extensions, reuse the type of the original namespace. */
16351 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16353 struct die_info
*ext_die
;
16354 struct dwarf2_cu
*ext_cu
= cu
;
16356 ext_die
= dwarf2_extension (die
, &ext_cu
);
16357 type
= read_type_die (ext_die
, ext_cu
);
16359 /* EXT_CU may not be the same as CU.
16360 Ensure TYPE is recorded with CU in die_type_hash. */
16361 return set_die_type (die
, type
, cu
);
16364 name
= namespace_name (die
, &is_anonymous
, cu
);
16366 /* Now build the name of the current namespace. */
16368 previous_prefix
= determine_prefix (die
, cu
);
16369 if (previous_prefix
[0] != '\0')
16370 name
= typename_concat (&objfile
->objfile_obstack
,
16371 previous_prefix
, name
, 0, cu
);
16373 /* Create the type. */
16374 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16376 return set_die_type (die
, type
, cu
);
16379 /* Read a namespace scope. */
16382 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16384 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16387 /* Add a symbol associated to this if we haven't seen the namespace
16388 before. Also, add a using directive if it's an anonymous
16391 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16395 type
= read_type_die (die
, cu
);
16396 new_symbol (die
, type
, cu
);
16398 namespace_name (die
, &is_anonymous
, cu
);
16401 const char *previous_prefix
= determine_prefix (die
, cu
);
16403 std::vector
<const char *> excludes
;
16404 add_using_directive (using_directives (cu
),
16405 previous_prefix
, TYPE_NAME (type
), NULL
,
16406 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16410 if (die
->child
!= NULL
)
16412 struct die_info
*child_die
= die
->child
;
16414 while (child_die
&& child_die
->tag
)
16416 process_die (child_die
, cu
);
16417 child_die
= child_die
->sibling
;
16422 /* Read a Fortran module as type. This DIE can be only a declaration used for
16423 imported module. Still we need that type as local Fortran "use ... only"
16424 declaration imports depend on the created type in determine_prefix. */
16426 static struct type
*
16427 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16429 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16430 const char *module_name
;
16433 module_name
= dwarf2_name (die
, cu
);
16434 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16436 return set_die_type (die
, type
, cu
);
16439 /* Read a Fortran module. */
16442 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16444 struct die_info
*child_die
= die
->child
;
16447 type
= read_type_die (die
, cu
);
16448 new_symbol (die
, type
, cu
);
16450 while (child_die
&& child_die
->tag
)
16452 process_die (child_die
, cu
);
16453 child_die
= child_die
->sibling
;
16457 /* Return the name of the namespace represented by DIE. Set
16458 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16461 static const char *
16462 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16464 struct die_info
*current_die
;
16465 const char *name
= NULL
;
16467 /* Loop through the extensions until we find a name. */
16469 for (current_die
= die
;
16470 current_die
!= NULL
;
16471 current_die
= dwarf2_extension (die
, &cu
))
16473 /* We don't use dwarf2_name here so that we can detect the absence
16474 of a name -> anonymous namespace. */
16475 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16481 /* Is it an anonymous namespace? */
16483 *is_anonymous
= (name
== NULL
);
16485 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16490 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16491 the user defined type vector. */
16493 static struct type
*
16494 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16496 struct gdbarch
*gdbarch
16497 = cu
->per_cu
->dwarf2_per_objfile
->objfile
->arch ();
16498 struct comp_unit_head
*cu_header
= &cu
->header
;
16500 struct attribute
*attr_byte_size
;
16501 struct attribute
*attr_address_class
;
16502 int byte_size
, addr_class
;
16503 struct type
*target_type
;
16505 target_type
= die_type (die
, cu
);
16507 /* The die_type call above may have already set the type for this DIE. */
16508 type
= get_die_type (die
, cu
);
16512 type
= lookup_pointer_type (target_type
);
16514 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16515 if (attr_byte_size
)
16516 byte_size
= DW_UNSND (attr_byte_size
);
16518 byte_size
= cu_header
->addr_size
;
16520 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16521 if (attr_address_class
)
16522 addr_class
= DW_UNSND (attr_address_class
);
16524 addr_class
= DW_ADDR_none
;
16526 ULONGEST alignment
= get_alignment (cu
, die
);
16528 /* If the pointer size, alignment, or address class is different
16529 than the default, create a type variant marked as such and set
16530 the length accordingly. */
16531 if (TYPE_LENGTH (type
) != byte_size
16532 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16533 && alignment
!= TYPE_RAW_ALIGN (type
))
16534 || addr_class
!= DW_ADDR_none
)
16536 if (gdbarch_address_class_type_flags_p (gdbarch
))
16540 type_flags
= gdbarch_address_class_type_flags
16541 (gdbarch
, byte_size
, addr_class
);
16542 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16544 type
= make_type_with_address_space (type
, type_flags
);
16546 else if (TYPE_LENGTH (type
) != byte_size
)
16548 complaint (_("invalid pointer size %d"), byte_size
);
16550 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16552 complaint (_("Invalid DW_AT_alignment"
16553 " - DIE at %s [in module %s]"),
16554 sect_offset_str (die
->sect_off
),
16555 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16559 /* Should we also complain about unhandled address classes? */
16563 TYPE_LENGTH (type
) = byte_size
;
16564 set_type_align (type
, alignment
);
16565 return set_die_type (die
, type
, cu
);
16568 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16569 the user defined type vector. */
16571 static struct type
*
16572 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16575 struct type
*to_type
;
16576 struct type
*domain
;
16578 to_type
= die_type (die
, cu
);
16579 domain
= die_containing_type (die
, cu
);
16581 /* The calls above may have already set the type for this DIE. */
16582 type
= get_die_type (die
, cu
);
16586 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16587 type
= lookup_methodptr_type (to_type
);
16588 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16590 struct type
*new_type
16591 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16593 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16594 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16595 TYPE_VARARGS (to_type
));
16596 type
= lookup_methodptr_type (new_type
);
16599 type
= lookup_memberptr_type (to_type
, domain
);
16601 return set_die_type (die
, type
, cu
);
16604 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16605 the user defined type vector. */
16607 static struct type
*
16608 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16609 enum type_code refcode
)
16611 struct comp_unit_head
*cu_header
= &cu
->header
;
16612 struct type
*type
, *target_type
;
16613 struct attribute
*attr
;
16615 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16617 target_type
= die_type (die
, cu
);
16619 /* The die_type call above may have already set the type for this DIE. */
16620 type
= get_die_type (die
, cu
);
16624 type
= lookup_reference_type (target_type
, refcode
);
16625 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16626 if (attr
!= nullptr)
16628 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16632 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16634 maybe_set_alignment (cu
, die
, type
);
16635 return set_die_type (die
, type
, cu
);
16638 /* Add the given cv-qualifiers to the element type of the array. GCC
16639 outputs DWARF type qualifiers that apply to an array, not the
16640 element type. But GDB relies on the array element type to carry
16641 the cv-qualifiers. This mimics section 6.7.3 of the C99
16644 static struct type
*
16645 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16646 struct type
*base_type
, int cnst
, int voltl
)
16648 struct type
*el_type
, *inner_array
;
16650 base_type
= copy_type (base_type
);
16651 inner_array
= base_type
;
16653 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
16655 TYPE_TARGET_TYPE (inner_array
) =
16656 copy_type (TYPE_TARGET_TYPE (inner_array
));
16657 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16660 el_type
= TYPE_TARGET_TYPE (inner_array
);
16661 cnst
|= TYPE_CONST (el_type
);
16662 voltl
|= TYPE_VOLATILE (el_type
);
16663 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16665 return set_die_type (die
, base_type
, cu
);
16668 static struct type
*
16669 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16671 struct type
*base_type
, *cv_type
;
16673 base_type
= die_type (die
, cu
);
16675 /* The die_type call above may have already set the type for this DIE. */
16676 cv_type
= get_die_type (die
, cu
);
16680 /* In case the const qualifier is applied to an array type, the element type
16681 is so qualified, not the array type (section 6.7.3 of C99). */
16682 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16683 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16685 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16686 return set_die_type (die
, cv_type
, cu
);
16689 static struct type
*
16690 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16692 struct type
*base_type
, *cv_type
;
16694 base_type
= die_type (die
, cu
);
16696 /* The die_type call above may have already set the type for this DIE. */
16697 cv_type
= get_die_type (die
, cu
);
16701 /* In case the volatile qualifier is applied to an array type, the
16702 element type is so qualified, not the array type (section 6.7.3
16704 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16705 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16707 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16708 return set_die_type (die
, cv_type
, cu
);
16711 /* Handle DW_TAG_restrict_type. */
16713 static struct type
*
16714 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16716 struct type
*base_type
, *cv_type
;
16718 base_type
= die_type (die
, cu
);
16720 /* The die_type call above may have already set the type for this DIE. */
16721 cv_type
= get_die_type (die
, cu
);
16725 cv_type
= make_restrict_type (base_type
);
16726 return set_die_type (die
, cv_type
, cu
);
16729 /* Handle DW_TAG_atomic_type. */
16731 static struct type
*
16732 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16734 struct type
*base_type
, *cv_type
;
16736 base_type
= die_type (die
, cu
);
16738 /* The die_type call above may have already set the type for this DIE. */
16739 cv_type
= get_die_type (die
, cu
);
16743 cv_type
= make_atomic_type (base_type
);
16744 return set_die_type (die
, cv_type
, cu
);
16747 /* Extract all information from a DW_TAG_string_type DIE and add to
16748 the user defined type vector. It isn't really a user defined type,
16749 but it behaves like one, with other DIE's using an AT_user_def_type
16750 attribute to reference it. */
16752 static struct type
*
16753 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16755 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16756 struct gdbarch
*gdbarch
= objfile
->arch ();
16757 struct type
*type
, *range_type
, *index_type
, *char_type
;
16758 struct attribute
*attr
;
16759 struct dynamic_prop prop
;
16760 bool length_is_constant
= true;
16763 /* There are a couple of places where bit sizes might be made use of
16764 when parsing a DW_TAG_string_type, however, no producer that we know
16765 of make use of these. Handling bit sizes that are a multiple of the
16766 byte size is easy enough, but what about other bit sizes? Lets deal
16767 with that problem when we have to. Warn about these attributes being
16768 unsupported, then parse the type and ignore them like we always
16770 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
16771 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
16773 static bool warning_printed
= false;
16774 if (!warning_printed
)
16776 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
16777 "currently supported on DW_TAG_string_type."));
16778 warning_printed
= true;
16782 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
16783 if (attr
!= nullptr && !attr
->form_is_constant ())
16785 /* The string length describes the location at which the length of
16786 the string can be found. The size of the length field can be
16787 specified with one of the attributes below. */
16788 struct type
*prop_type
;
16789 struct attribute
*len
16790 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
16791 if (len
== nullptr)
16792 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16793 if (len
!= nullptr && len
->form_is_constant ())
16795 /* Pass 0 as the default as we know this attribute is constant
16796 and the default value will not be returned. */
16797 LONGEST sz
= len
->constant_value (0);
16798 prop_type
= cu
->per_cu
->int_type (sz
, true);
16802 /* If the size is not specified then we assume it is the size of
16803 an address on this target. */
16804 prop_type
= cu
->per_cu
->addr_sized_int_type (true);
16807 /* Convert the attribute into a dynamic property. */
16808 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
16811 length_is_constant
= false;
16813 else if (attr
!= nullptr)
16815 /* This DW_AT_string_length just contains the length with no
16816 indirection. There's no need to create a dynamic property in this
16817 case. Pass 0 for the default value as we know it will not be
16818 returned in this case. */
16819 length
= attr
->constant_value (0);
16821 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
16823 /* We don't currently support non-constant byte sizes for strings. */
16824 length
= attr
->constant_value (1);
16828 /* Use 1 as a fallback length if we have nothing else. */
16832 index_type
= objfile_type (objfile
)->builtin_int
;
16833 if (length_is_constant
)
16834 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
16837 struct dynamic_prop low_bound
;
16839 low_bound
.kind
= PROP_CONST
;
16840 low_bound
.data
.const_val
= 1;
16841 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
16843 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
16844 type
= create_string_type (NULL
, char_type
, range_type
);
16846 return set_die_type (die
, type
, cu
);
16849 /* Assuming that DIE corresponds to a function, returns nonzero
16850 if the function is prototyped. */
16853 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
16855 struct attribute
*attr
;
16857 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
16858 if (attr
&& (DW_UNSND (attr
) != 0))
16861 /* The DWARF standard implies that the DW_AT_prototyped attribute
16862 is only meaningful for C, but the concept also extends to other
16863 languages that allow unprototyped functions (Eg: Objective C).
16864 For all other languages, assume that functions are always
16866 if (cu
->language
!= language_c
16867 && cu
->language
!= language_objc
16868 && cu
->language
!= language_opencl
)
16871 /* RealView does not emit DW_AT_prototyped. We can not distinguish
16872 prototyped and unprototyped functions; default to prototyped,
16873 since that is more common in modern code (and RealView warns
16874 about unprototyped functions). */
16875 if (producer_is_realview (cu
->producer
))
16881 /* Handle DIES due to C code like:
16885 int (*funcp)(int a, long l);
16889 ('funcp' generates a DW_TAG_subroutine_type DIE). */
16891 static struct type
*
16892 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16894 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16895 struct type
*type
; /* Type that this function returns. */
16896 struct type
*ftype
; /* Function that returns above type. */
16897 struct attribute
*attr
;
16899 type
= die_type (die
, cu
);
16901 /* The die_type call above may have already set the type for this DIE. */
16902 ftype
= get_die_type (die
, cu
);
16906 ftype
= lookup_function_type (type
);
16908 if (prototyped_function_p (die
, cu
))
16909 TYPE_PROTOTYPED (ftype
) = 1;
16911 /* Store the calling convention in the type if it's available in
16912 the subroutine die. Otherwise set the calling convention to
16913 the default value DW_CC_normal. */
16914 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
16915 if (attr
!= nullptr
16916 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
16917 TYPE_CALLING_CONVENTION (ftype
)
16918 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
16919 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
16920 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
16922 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
16924 /* Record whether the function returns normally to its caller or not
16925 if the DWARF producer set that information. */
16926 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
16927 if (attr
&& (DW_UNSND (attr
) != 0))
16928 TYPE_NO_RETURN (ftype
) = 1;
16930 /* We need to add the subroutine type to the die immediately so
16931 we don't infinitely recurse when dealing with parameters
16932 declared as the same subroutine type. */
16933 set_die_type (die
, ftype
, cu
);
16935 if (die
->child
!= NULL
)
16937 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
16938 struct die_info
*child_die
;
16939 int nparams
, iparams
;
16941 /* Count the number of parameters.
16942 FIXME: GDB currently ignores vararg functions, but knows about
16943 vararg member functions. */
16945 child_die
= die
->child
;
16946 while (child_die
&& child_die
->tag
)
16948 if (child_die
->tag
== DW_TAG_formal_parameter
)
16950 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
16951 TYPE_VARARGS (ftype
) = 1;
16952 child_die
= child_die
->sibling
;
16955 /* Allocate storage for parameters and fill them in. */
16956 TYPE_NFIELDS (ftype
) = nparams
;
16957 TYPE_FIELDS (ftype
) = (struct field
*)
16958 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
16960 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
16961 even if we error out during the parameters reading below. */
16962 for (iparams
= 0; iparams
< nparams
; iparams
++)
16963 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
16966 child_die
= die
->child
;
16967 while (child_die
&& child_die
->tag
)
16969 if (child_die
->tag
== DW_TAG_formal_parameter
)
16971 struct type
*arg_type
;
16973 /* DWARF version 2 has no clean way to discern C++
16974 static and non-static member functions. G++ helps
16975 GDB by marking the first parameter for non-static
16976 member functions (which is the this pointer) as
16977 artificial. We pass this information to
16978 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
16980 DWARF version 3 added DW_AT_object_pointer, which GCC
16981 4.5 does not yet generate. */
16982 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
16983 if (attr
!= nullptr)
16984 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
16986 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
16987 arg_type
= die_type (child_die
, cu
);
16989 /* RealView does not mark THIS as const, which the testsuite
16990 expects. GCC marks THIS as const in method definitions,
16991 but not in the class specifications (GCC PR 43053). */
16992 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
16993 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
16996 struct dwarf2_cu
*arg_cu
= cu
;
16997 const char *name
= dwarf2_name (child_die
, cu
);
16999 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17000 if (attr
!= nullptr)
17002 /* If the compiler emits this, use it. */
17003 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17006 else if (name
&& strcmp (name
, "this") == 0)
17007 /* Function definitions will have the argument names. */
17009 else if (name
== NULL
&& iparams
== 0)
17010 /* Declarations may not have the names, so like
17011 elsewhere in GDB, assume an artificial first
17012 argument is "this". */
17016 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17020 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17023 child_die
= child_die
->sibling
;
17030 static struct type
*
17031 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17033 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17034 const char *name
= NULL
;
17035 struct type
*this_type
, *target_type
;
17037 name
= dwarf2_full_name (NULL
, die
, cu
);
17038 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17039 TYPE_TARGET_STUB (this_type
) = 1;
17040 set_die_type (die
, this_type
, cu
);
17041 target_type
= die_type (die
, cu
);
17042 if (target_type
!= this_type
)
17043 TYPE_TARGET_TYPE (this_type
) = target_type
;
17046 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17047 spec and cause infinite loops in GDB. */
17048 complaint (_("Self-referential DW_TAG_typedef "
17049 "- DIE at %s [in module %s]"),
17050 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17051 TYPE_TARGET_TYPE (this_type
) = NULL
;
17055 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
17056 anonymous typedefs, which is, strictly speaking, invalid DWARF.
17057 Handle these by just returning the target type, rather than
17058 constructing an anonymous typedef type and trying to handle this
17060 set_die_type (die
, target_type
, cu
);
17061 return target_type
;
17066 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17067 (which may be different from NAME) to the architecture back-end to allow
17068 it to guess the correct format if necessary. */
17070 static struct type
*
17071 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17072 const char *name_hint
, enum bfd_endian byte_order
)
17074 struct gdbarch
*gdbarch
= objfile
->arch ();
17075 const struct floatformat
**format
;
17078 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17080 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
17082 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17087 /* Allocate an integer type of size BITS and name NAME. */
17089 static struct type
*
17090 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17091 int bits
, int unsigned_p
, const char *name
)
17095 /* Versions of Intel's C Compiler generate an integer type called "void"
17096 instead of using DW_TAG_unspecified_type. This has been seen on
17097 at least versions 14, 17, and 18. */
17098 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17099 && strcmp (name
, "void") == 0)
17100 type
= objfile_type (objfile
)->builtin_void
;
17102 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17107 /* Initialise and return a floating point type of size BITS suitable for
17108 use as a component of a complex number. The NAME_HINT is passed through
17109 when initialising the floating point type and is the name of the complex
17112 As DWARF doesn't currently provide an explicit name for the components
17113 of a complex number, but it can be helpful to have these components
17114 named, we try to select a suitable name based on the size of the
17116 static struct type
*
17117 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17118 struct objfile
*objfile
,
17119 int bits
, const char *name_hint
,
17120 enum bfd_endian byte_order
)
17122 gdbarch
*gdbarch
= objfile
->arch ();
17123 struct type
*tt
= nullptr;
17125 /* Try to find a suitable floating point builtin type of size BITS.
17126 We're going to use the name of this type as the name for the complex
17127 target type that we are about to create. */
17128 switch (cu
->language
)
17130 case language_fortran
:
17134 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17137 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17139 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17141 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17149 tt
= builtin_type (gdbarch
)->builtin_float
;
17152 tt
= builtin_type (gdbarch
)->builtin_double
;
17154 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17156 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17162 /* If the type we found doesn't match the size we were looking for, then
17163 pretend we didn't find a type at all, the complex target type we
17164 create will then be nameless. */
17165 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17168 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
17169 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
17172 /* Find a representation of a given base type and install
17173 it in the TYPE field of the die. */
17175 static struct type
*
17176 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17178 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17180 struct attribute
*attr
;
17181 int encoding
= 0, bits
= 0;
17185 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17186 if (attr
!= nullptr)
17187 encoding
= DW_UNSND (attr
);
17188 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17189 if (attr
!= nullptr)
17190 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17191 name
= dwarf2_name (die
, cu
);
17193 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17195 arch
= objfile
->arch ();
17196 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
17198 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17201 int endianity
= DW_UNSND (attr
);
17206 byte_order
= BFD_ENDIAN_BIG
;
17208 case DW_END_little
:
17209 byte_order
= BFD_ENDIAN_LITTLE
;
17212 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
17219 case DW_ATE_address
:
17220 /* Turn DW_ATE_address into a void * pointer. */
17221 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17222 type
= init_pointer_type (objfile
, bits
, name
, type
);
17224 case DW_ATE_boolean
:
17225 type
= init_boolean_type (objfile
, bits
, 1, name
);
17227 case DW_ATE_complex_float
:
17228 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
17230 if (TYPE_CODE (type
) == TYPE_CODE_ERROR
)
17232 if (name
== nullptr)
17234 struct obstack
*obstack
17235 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17236 name
= obconcat (obstack
, "_Complex ", TYPE_NAME (type
),
17239 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17242 type
= init_complex_type (name
, type
);
17244 case DW_ATE_decimal_float
:
17245 type
= init_decfloat_type (objfile
, bits
, name
);
17248 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
17250 case DW_ATE_signed
:
17251 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17253 case DW_ATE_unsigned
:
17254 if (cu
->language
== language_fortran
17256 && startswith (name
, "character("))
17257 type
= init_character_type (objfile
, bits
, 1, name
);
17259 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17261 case DW_ATE_signed_char
:
17262 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17263 || cu
->language
== language_pascal
17264 || cu
->language
== language_fortran
)
17265 type
= init_character_type (objfile
, bits
, 0, name
);
17267 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17269 case DW_ATE_unsigned_char
:
17270 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17271 || cu
->language
== language_pascal
17272 || cu
->language
== language_fortran
17273 || cu
->language
== language_rust
)
17274 type
= init_character_type (objfile
, bits
, 1, name
);
17276 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17281 type
= builtin_type (arch
)->builtin_char16
;
17282 else if (bits
== 32)
17283 type
= builtin_type (arch
)->builtin_char32
;
17286 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17288 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17290 return set_die_type (die
, type
, cu
);
17295 complaint (_("unsupported DW_AT_encoding: '%s'"),
17296 dwarf_type_encoding_name (encoding
));
17297 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17301 if (name
&& strcmp (name
, "char") == 0)
17302 TYPE_NOSIGN (type
) = 1;
17304 maybe_set_alignment (cu
, die
, type
);
17306 TYPE_ENDIANITY_NOT_DEFAULT (type
) = gdbarch_byte_order (arch
) != byte_order
;
17308 return set_die_type (die
, type
, cu
);
17311 /* Parse dwarf attribute if it's a block, reference or constant and put the
17312 resulting value of the attribute into struct bound_prop.
17313 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17316 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17317 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17318 struct type
*default_type
)
17320 struct dwarf2_property_baton
*baton
;
17321 struct obstack
*obstack
17322 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17324 gdb_assert (default_type
!= NULL
);
17326 if (attr
== NULL
|| prop
== NULL
)
17329 if (attr
->form_is_block ())
17331 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17332 baton
->property_type
= default_type
;
17333 baton
->locexpr
.per_cu
= cu
->per_cu
;
17334 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17335 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17336 switch (attr
->name
)
17338 case DW_AT_string_length
:
17339 baton
->locexpr
.is_reference
= true;
17342 baton
->locexpr
.is_reference
= false;
17345 prop
->data
.baton
= baton
;
17346 prop
->kind
= PROP_LOCEXPR
;
17347 gdb_assert (prop
->data
.baton
!= NULL
);
17349 else if (attr
->form_is_ref ())
17351 struct dwarf2_cu
*target_cu
= cu
;
17352 struct die_info
*target_die
;
17353 struct attribute
*target_attr
;
17355 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17356 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17357 if (target_attr
== NULL
)
17358 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17360 if (target_attr
== NULL
)
17363 switch (target_attr
->name
)
17365 case DW_AT_location
:
17366 if (target_attr
->form_is_section_offset ())
17368 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17369 baton
->property_type
= die_type (target_die
, target_cu
);
17370 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17371 prop
->data
.baton
= baton
;
17372 prop
->kind
= PROP_LOCLIST
;
17373 gdb_assert (prop
->data
.baton
!= NULL
);
17375 else if (target_attr
->form_is_block ())
17377 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17378 baton
->property_type
= die_type (target_die
, target_cu
);
17379 baton
->locexpr
.per_cu
= cu
->per_cu
;
17380 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17381 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17382 baton
->locexpr
.is_reference
= true;
17383 prop
->data
.baton
= baton
;
17384 prop
->kind
= PROP_LOCEXPR
;
17385 gdb_assert (prop
->data
.baton
!= NULL
);
17389 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17390 "dynamic property");
17394 case DW_AT_data_member_location
:
17398 if (!handle_data_member_location (target_die
, target_cu
,
17402 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17403 baton
->property_type
= read_type_die (target_die
->parent
,
17405 baton
->offset_info
.offset
= offset
;
17406 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17407 prop
->data
.baton
= baton
;
17408 prop
->kind
= PROP_ADDR_OFFSET
;
17413 else if (attr
->form_is_constant ())
17415 prop
->data
.const_val
= attr
->constant_value (0);
17416 prop
->kind
= PROP_CONST
;
17420 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17421 dwarf2_name (die
, cu
));
17431 dwarf2_per_cu_data::int_type (int size_in_bytes
, bool unsigned_p
) const
17433 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17434 struct type
*int_type
;
17436 /* Helper macro to examine the various builtin types. */
17437 #define TRY_TYPE(F) \
17438 int_type = (unsigned_p \
17439 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17440 : objfile_type (objfile)->builtin_ ## F); \
17441 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
17448 TRY_TYPE (long_long
);
17452 gdb_assert_not_reached ("unable to find suitable integer type");
17458 dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p
) const
17460 int addr_size
= this->addr_size ();
17461 return int_type (addr_size
, unsigned_p
);
17464 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17465 present (which is valid) then compute the default type based on the
17466 compilation units address size. */
17468 static struct type
*
17469 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17471 struct type
*index_type
= die_type (die
, cu
);
17473 /* Dwarf-2 specifications explicitly allows to create subrange types
17474 without specifying a base type.
17475 In that case, the base type must be set to the type of
17476 the lower bound, upper bound or count, in that order, if any of these
17477 three attributes references an object that has a type.
17478 If no base type is found, the Dwarf-2 specifications say that
17479 a signed integer type of size equal to the size of an address should
17481 For the following C code: `extern char gdb_int [];'
17482 GCC produces an empty range DIE.
17483 FIXME: muller/2010-05-28: Possible references to object for low bound,
17484 high bound or count are not yet handled by this code. */
17485 if (TYPE_CODE (index_type
) == TYPE_CODE_VOID
)
17486 index_type
= cu
->per_cu
->addr_sized_int_type (false);
17491 /* Read the given DW_AT_subrange DIE. */
17493 static struct type
*
17494 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17496 struct type
*base_type
, *orig_base_type
;
17497 struct type
*range_type
;
17498 struct attribute
*attr
;
17499 struct dynamic_prop low
, high
;
17500 int low_default_is_valid
;
17501 int high_bound_is_count
= 0;
17503 ULONGEST negative_mask
;
17505 orig_base_type
= read_subrange_index_type (die
, cu
);
17507 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17508 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17509 creating the range type, but we use the result of check_typedef
17510 when examining properties of the type. */
17511 base_type
= check_typedef (orig_base_type
);
17513 /* The die_type call above may have already set the type for this DIE. */
17514 range_type
= get_die_type (die
, cu
);
17518 low
.kind
= PROP_CONST
;
17519 high
.kind
= PROP_CONST
;
17520 high
.data
.const_val
= 0;
17522 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17523 omitting DW_AT_lower_bound. */
17524 switch (cu
->language
)
17527 case language_cplus
:
17528 low
.data
.const_val
= 0;
17529 low_default_is_valid
= 1;
17531 case language_fortran
:
17532 low
.data
.const_val
= 1;
17533 low_default_is_valid
= 1;
17536 case language_objc
:
17537 case language_rust
:
17538 low
.data
.const_val
= 0;
17539 low_default_is_valid
= (cu
->header
.version
>= 4);
17543 case language_pascal
:
17544 low
.data
.const_val
= 1;
17545 low_default_is_valid
= (cu
->header
.version
>= 4);
17548 low
.data
.const_val
= 0;
17549 low_default_is_valid
= 0;
17553 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17554 if (attr
!= nullptr)
17555 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17556 else if (!low_default_is_valid
)
17557 complaint (_("Missing DW_AT_lower_bound "
17558 "- DIE at %s [in module %s]"),
17559 sect_offset_str (die
->sect_off
),
17560 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17562 struct attribute
*attr_ub
, *attr_count
;
17563 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17564 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17566 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17567 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17569 /* If bounds are constant do the final calculation here. */
17570 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17571 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17573 high_bound_is_count
= 1;
17577 if (attr_ub
!= NULL
)
17578 complaint (_("Unresolved DW_AT_upper_bound "
17579 "- DIE at %s [in module %s]"),
17580 sect_offset_str (die
->sect_off
),
17581 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17582 if (attr_count
!= NULL
)
17583 complaint (_("Unresolved DW_AT_count "
17584 "- DIE at %s [in module %s]"),
17585 sect_offset_str (die
->sect_off
),
17586 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17591 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17592 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
17593 bias
= bias_attr
->constant_value (0);
17595 /* Normally, the DWARF producers are expected to use a signed
17596 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17597 But this is unfortunately not always the case, as witnessed
17598 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17599 is used instead. To work around that ambiguity, we treat
17600 the bounds as signed, and thus sign-extend their values, when
17601 the base type is signed. */
17603 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17604 if (low
.kind
== PROP_CONST
17605 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17606 low
.data
.const_val
|= negative_mask
;
17607 if (high
.kind
== PROP_CONST
17608 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17609 high
.data
.const_val
|= negative_mask
;
17611 /* Check for bit and byte strides. */
17612 struct dynamic_prop byte_stride_prop
;
17613 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17614 if (attr_byte_stride
!= nullptr)
17616 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17617 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
17621 struct dynamic_prop bit_stride_prop
;
17622 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17623 if (attr_bit_stride
!= nullptr)
17625 /* It only makes sense to have either a bit or byte stride. */
17626 if (attr_byte_stride
!= nullptr)
17628 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
17629 "- DIE at %s [in module %s]"),
17630 sect_offset_str (die
->sect_off
),
17631 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17632 attr_bit_stride
= nullptr;
17636 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17637 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
17642 if (attr_byte_stride
!= nullptr
17643 || attr_bit_stride
!= nullptr)
17645 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
17646 struct dynamic_prop
*stride
17647 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
17650 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
17651 &high
, bias
, stride
, byte_stride_p
);
17654 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
17656 if (high_bound_is_count
)
17657 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17659 /* Ada expects an empty array on no boundary attributes. */
17660 if (attr
== NULL
&& cu
->language
!= language_ada
)
17661 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17663 name
= dwarf2_name (die
, cu
);
17665 TYPE_NAME (range_type
) = name
;
17667 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17668 if (attr
!= nullptr)
17669 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17671 maybe_set_alignment (cu
, die
, range_type
);
17673 set_die_type (die
, range_type
, cu
);
17675 /* set_die_type should be already done. */
17676 set_descriptive_type (range_type
, die
, cu
);
17681 static struct type
*
17682 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17686 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17688 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17690 /* In Ada, an unspecified type is typically used when the description
17691 of the type is deferred to a different unit. When encountering
17692 such a type, we treat it as a stub, and try to resolve it later on,
17694 if (cu
->language
== language_ada
)
17695 TYPE_STUB (type
) = 1;
17697 return set_die_type (die
, type
, cu
);
17700 /* Read a single die and all its descendents. Set the die's sibling
17701 field to NULL; set other fields in the die correctly, and set all
17702 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17703 location of the info_ptr after reading all of those dies. PARENT
17704 is the parent of the die in question. */
17706 static struct die_info
*
17707 read_die_and_children (const struct die_reader_specs
*reader
,
17708 const gdb_byte
*info_ptr
,
17709 const gdb_byte
**new_info_ptr
,
17710 struct die_info
*parent
)
17712 struct die_info
*die
;
17713 const gdb_byte
*cur_ptr
;
17715 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
17718 *new_info_ptr
= cur_ptr
;
17721 store_in_ref_table (die
, reader
->cu
);
17723 if (die
->has_children
)
17724 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17728 *new_info_ptr
= cur_ptr
;
17731 die
->sibling
= NULL
;
17732 die
->parent
= parent
;
17736 /* Read a die, all of its descendents, and all of its siblings; set
17737 all of the fields of all of the dies correctly. Arguments are as
17738 in read_die_and_children. */
17740 static struct die_info
*
17741 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17742 const gdb_byte
*info_ptr
,
17743 const gdb_byte
**new_info_ptr
,
17744 struct die_info
*parent
)
17746 struct die_info
*first_die
, *last_sibling
;
17747 const gdb_byte
*cur_ptr
;
17749 cur_ptr
= info_ptr
;
17750 first_die
= last_sibling
= NULL
;
17754 struct die_info
*die
17755 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17759 *new_info_ptr
= cur_ptr
;
17766 last_sibling
->sibling
= die
;
17768 last_sibling
= die
;
17772 /* Read a die, all of its descendents, and all of its siblings; set
17773 all of the fields of all of the dies correctly. Arguments are as
17774 in read_die_and_children.
17775 This the main entry point for reading a DIE and all its children. */
17777 static struct die_info
*
17778 read_die_and_siblings (const struct die_reader_specs
*reader
,
17779 const gdb_byte
*info_ptr
,
17780 const gdb_byte
**new_info_ptr
,
17781 struct die_info
*parent
)
17783 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17784 new_info_ptr
, parent
);
17786 if (dwarf_die_debug
)
17788 fprintf_unfiltered (gdb_stdlog
,
17789 "Read die from %s@0x%x of %s:\n",
17790 reader
->die_section
->get_name (),
17791 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17792 bfd_get_filename (reader
->abfd
));
17793 dump_die (die
, dwarf_die_debug
);
17799 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17801 The caller is responsible for filling in the extra attributes
17802 and updating (*DIEP)->num_attrs.
17803 Set DIEP to point to a newly allocated die with its information,
17804 except for its child, sibling, and parent fields. */
17806 static const gdb_byte
*
17807 read_full_die_1 (const struct die_reader_specs
*reader
,
17808 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17809 int num_extra_attrs
)
17811 unsigned int abbrev_number
, bytes_read
, i
;
17812 struct abbrev_info
*abbrev
;
17813 struct die_info
*die
;
17814 struct dwarf2_cu
*cu
= reader
->cu
;
17815 bfd
*abfd
= reader
->abfd
;
17817 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17818 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17819 info_ptr
+= bytes_read
;
17820 if (!abbrev_number
)
17826 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17828 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17830 bfd_get_filename (abfd
));
17832 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17833 die
->sect_off
= sect_off
;
17834 die
->tag
= abbrev
->tag
;
17835 die
->abbrev
= abbrev_number
;
17836 die
->has_children
= abbrev
->has_children
;
17838 /* Make the result usable.
17839 The caller needs to update num_attrs after adding the extra
17841 die
->num_attrs
= abbrev
->num_attrs
;
17843 std::vector
<int> indexes_that_need_reprocess
;
17844 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17846 bool need_reprocess
;
17848 read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17849 info_ptr
, &need_reprocess
);
17850 if (need_reprocess
)
17851 indexes_that_need_reprocess
.push_back (i
);
17854 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
17855 if (attr
!= nullptr)
17856 cu
->str_offsets_base
= DW_UNSND (attr
);
17858 attr
= die
->attr (DW_AT_loclists_base
);
17859 if (attr
!= nullptr)
17860 cu
->loclist_base
= DW_UNSND (attr
);
17862 auto maybe_addr_base
= die
->addr_base ();
17863 if (maybe_addr_base
.has_value ())
17864 cu
->addr_base
= *maybe_addr_base
;
17865 for (int index
: indexes_that_need_reprocess
)
17866 read_attribute_reprocess (reader
, &die
->attrs
[index
]);
17871 /* Read a die and all its attributes.
17872 Set DIEP to point to a newly allocated die with its information,
17873 except for its child, sibling, and parent fields. */
17875 static const gdb_byte
*
17876 read_full_die (const struct die_reader_specs
*reader
,
17877 struct die_info
**diep
, const gdb_byte
*info_ptr
)
17879 const gdb_byte
*result
;
17881 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
17883 if (dwarf_die_debug
)
17885 fprintf_unfiltered (gdb_stdlog
,
17886 "Read die from %s@0x%x of %s:\n",
17887 reader
->die_section
->get_name (),
17888 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17889 bfd_get_filename (reader
->abfd
));
17890 dump_die (*diep
, dwarf_die_debug
);
17897 /* Returns nonzero if TAG represents a type that we might generate a partial
17901 is_type_tag_for_partial (int tag
)
17906 /* Some types that would be reasonable to generate partial symbols for,
17907 that we don't at present. */
17908 case DW_TAG_array_type
:
17909 case DW_TAG_file_type
:
17910 case DW_TAG_ptr_to_member_type
:
17911 case DW_TAG_set_type
:
17912 case DW_TAG_string_type
:
17913 case DW_TAG_subroutine_type
:
17915 case DW_TAG_base_type
:
17916 case DW_TAG_class_type
:
17917 case DW_TAG_interface_type
:
17918 case DW_TAG_enumeration_type
:
17919 case DW_TAG_structure_type
:
17920 case DW_TAG_subrange_type
:
17921 case DW_TAG_typedef
:
17922 case DW_TAG_union_type
:
17929 /* Load all DIEs that are interesting for partial symbols into memory. */
17931 static struct partial_die_info
*
17932 load_partial_dies (const struct die_reader_specs
*reader
,
17933 const gdb_byte
*info_ptr
, int building_psymtab
)
17935 struct dwarf2_cu
*cu
= reader
->cu
;
17936 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17937 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
17938 unsigned int bytes_read
;
17939 unsigned int load_all
= 0;
17940 int nesting_level
= 1;
17945 gdb_assert (cu
->per_cu
!= NULL
);
17946 if (cu
->per_cu
->load_all_dies
)
17950 = htab_create_alloc_ex (cu
->header
.length
/ 12,
17954 &cu
->comp_unit_obstack
,
17955 hashtab_obstack_allocate
,
17956 dummy_obstack_deallocate
);
17960 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
17962 /* A NULL abbrev means the end of a series of children. */
17963 if (abbrev
== NULL
)
17965 if (--nesting_level
== 0)
17968 info_ptr
+= bytes_read
;
17969 last_die
= parent_die
;
17970 parent_die
= parent_die
->die_parent
;
17974 /* Check for template arguments. We never save these; if
17975 they're seen, we just mark the parent, and go on our way. */
17976 if (parent_die
!= NULL
17977 && cu
->language
== language_cplus
17978 && (abbrev
->tag
== DW_TAG_template_type_param
17979 || abbrev
->tag
== DW_TAG_template_value_param
))
17981 parent_die
->has_template_arguments
= 1;
17985 /* We don't need a partial DIE for the template argument. */
17986 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
17991 /* We only recurse into c++ subprograms looking for template arguments.
17992 Skip their other children. */
17994 && cu
->language
== language_cplus
17995 && parent_die
!= NULL
17996 && parent_die
->tag
== DW_TAG_subprogram
)
17998 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18002 /* Check whether this DIE is interesting enough to save. Normally
18003 we would not be interested in members here, but there may be
18004 later variables referencing them via DW_AT_specification (for
18005 static members). */
18007 && !is_type_tag_for_partial (abbrev
->tag
)
18008 && abbrev
->tag
!= DW_TAG_constant
18009 && abbrev
->tag
!= DW_TAG_enumerator
18010 && abbrev
->tag
!= DW_TAG_subprogram
18011 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18012 && abbrev
->tag
!= DW_TAG_lexical_block
18013 && abbrev
->tag
!= DW_TAG_variable
18014 && abbrev
->tag
!= DW_TAG_namespace
18015 && abbrev
->tag
!= DW_TAG_module
18016 && abbrev
->tag
!= DW_TAG_member
18017 && abbrev
->tag
!= DW_TAG_imported_unit
18018 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18020 /* Otherwise we skip to the next sibling, if any. */
18021 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18025 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18028 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18030 /* This two-pass algorithm for processing partial symbols has a
18031 high cost in cache pressure. Thus, handle some simple cases
18032 here which cover the majority of C partial symbols. DIEs
18033 which neither have specification tags in them, nor could have
18034 specification tags elsewhere pointing at them, can simply be
18035 processed and discarded.
18037 This segment is also optional; scan_partial_symbols and
18038 add_partial_symbol will handle these DIEs if we chain
18039 them in normally. When compilers which do not emit large
18040 quantities of duplicate debug information are more common,
18041 this code can probably be removed. */
18043 /* Any complete simple types at the top level (pretty much all
18044 of them, for a language without namespaces), can be processed
18046 if (parent_die
== NULL
18047 && pdi
.has_specification
== 0
18048 && pdi
.is_declaration
== 0
18049 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18050 || pdi
.tag
== DW_TAG_base_type
18051 || pdi
.tag
== DW_TAG_subrange_type
))
18053 if (building_psymtab
&& pdi
.name
!= NULL
)
18054 add_psymbol_to_list (pdi
.name
, false,
18055 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18056 psymbol_placement::STATIC
,
18057 0, cu
->language
, objfile
);
18058 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18062 /* The exception for DW_TAG_typedef with has_children above is
18063 a workaround of GCC PR debug/47510. In the case of this complaint
18064 type_name_or_error will error on such types later.
18066 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18067 it could not find the child DIEs referenced later, this is checked
18068 above. In correct DWARF DW_TAG_typedef should have no children. */
18070 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18071 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18072 "- DIE at %s [in module %s]"),
18073 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18075 /* If we're at the second level, and we're an enumerator, and
18076 our parent has no specification (meaning possibly lives in a
18077 namespace elsewhere), then we can add the partial symbol now
18078 instead of queueing it. */
18079 if (pdi
.tag
== DW_TAG_enumerator
18080 && parent_die
!= NULL
18081 && parent_die
->die_parent
== NULL
18082 && parent_die
->tag
== DW_TAG_enumeration_type
18083 && parent_die
->has_specification
== 0)
18085 if (pdi
.name
== NULL
)
18086 complaint (_("malformed enumerator DIE ignored"));
18087 else if (building_psymtab
)
18088 add_psymbol_to_list (pdi
.name
, false,
18089 VAR_DOMAIN
, LOC_CONST
, -1,
18090 cu
->language
== language_cplus
18091 ? psymbol_placement::GLOBAL
18092 : psymbol_placement::STATIC
,
18093 0, cu
->language
, objfile
);
18095 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18099 struct partial_die_info
*part_die
18100 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18102 /* We'll save this DIE so link it in. */
18103 part_die
->die_parent
= parent_die
;
18104 part_die
->die_sibling
= NULL
;
18105 part_die
->die_child
= NULL
;
18107 if (last_die
&& last_die
== parent_die
)
18108 last_die
->die_child
= part_die
;
18110 last_die
->die_sibling
= part_die
;
18112 last_die
= part_die
;
18114 if (first_die
== NULL
)
18115 first_die
= part_die
;
18117 /* Maybe add the DIE to the hash table. Not all DIEs that we
18118 find interesting need to be in the hash table, because we
18119 also have the parent/sibling/child chains; only those that we
18120 might refer to by offset later during partial symbol reading.
18122 For now this means things that might have be the target of a
18123 DW_AT_specification, DW_AT_abstract_origin, or
18124 DW_AT_extension. DW_AT_extension will refer only to
18125 namespaces; DW_AT_abstract_origin refers to functions (and
18126 many things under the function DIE, but we do not recurse
18127 into function DIEs during partial symbol reading) and
18128 possibly variables as well; DW_AT_specification refers to
18129 declarations. Declarations ought to have the DW_AT_declaration
18130 flag. It happens that GCC forgets to put it in sometimes, but
18131 only for functions, not for types.
18133 Adding more things than necessary to the hash table is harmless
18134 except for the performance cost. Adding too few will result in
18135 wasted time in find_partial_die, when we reread the compilation
18136 unit with load_all_dies set. */
18139 || abbrev
->tag
== DW_TAG_constant
18140 || abbrev
->tag
== DW_TAG_subprogram
18141 || abbrev
->tag
== DW_TAG_variable
18142 || abbrev
->tag
== DW_TAG_namespace
18143 || part_die
->is_declaration
)
18147 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18148 to_underlying (part_die
->sect_off
),
18153 /* For some DIEs we want to follow their children (if any). For C
18154 we have no reason to follow the children of structures; for other
18155 languages we have to, so that we can get at method physnames
18156 to infer fully qualified class names, for DW_AT_specification,
18157 and for C++ template arguments. For C++, we also look one level
18158 inside functions to find template arguments (if the name of the
18159 function does not already contain the template arguments).
18161 For Ada and Fortran, we need to scan the children of subprograms
18162 and lexical blocks as well because these languages allow the
18163 definition of nested entities that could be interesting for the
18164 debugger, such as nested subprograms for instance. */
18165 if (last_die
->has_children
18167 || last_die
->tag
== DW_TAG_namespace
18168 || last_die
->tag
== DW_TAG_module
18169 || last_die
->tag
== DW_TAG_enumeration_type
18170 || (cu
->language
== language_cplus
18171 && last_die
->tag
== DW_TAG_subprogram
18172 && (last_die
->name
== NULL
18173 || strchr (last_die
->name
, '<') == NULL
))
18174 || (cu
->language
!= language_c
18175 && (last_die
->tag
== DW_TAG_class_type
18176 || last_die
->tag
== DW_TAG_interface_type
18177 || last_die
->tag
== DW_TAG_structure_type
18178 || last_die
->tag
== DW_TAG_union_type
))
18179 || ((cu
->language
== language_ada
18180 || cu
->language
== language_fortran
)
18181 && (last_die
->tag
== DW_TAG_subprogram
18182 || last_die
->tag
== DW_TAG_lexical_block
))))
18185 parent_die
= last_die
;
18189 /* Otherwise we skip to the next sibling, if any. */
18190 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18192 /* Back to the top, do it again. */
18196 partial_die_info::partial_die_info (sect_offset sect_off_
,
18197 struct abbrev_info
*abbrev
)
18198 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18202 /* Read a minimal amount of information into the minimal die structure.
18203 INFO_PTR should point just after the initial uleb128 of a DIE. */
18206 partial_die_info::read (const struct die_reader_specs
*reader
,
18207 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18209 struct dwarf2_cu
*cu
= reader
->cu
;
18210 struct dwarf2_per_objfile
*dwarf2_per_objfile
18211 = cu
->per_cu
->dwarf2_per_objfile
;
18213 int has_low_pc_attr
= 0;
18214 int has_high_pc_attr
= 0;
18215 int high_pc_relative
= 0;
18217 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18220 bool need_reprocess
;
18221 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
],
18222 info_ptr
, &need_reprocess
);
18223 /* String and address offsets that need to do the reprocessing have
18224 already been read at this point, so there is no need to wait until
18225 the loop terminates to do the reprocessing. */
18226 if (need_reprocess
)
18227 read_attribute_reprocess (reader
, &attr
);
18228 /* Store the data if it is of an attribute we want to keep in a
18229 partial symbol table. */
18235 case DW_TAG_compile_unit
:
18236 case DW_TAG_partial_unit
:
18237 case DW_TAG_type_unit
:
18238 /* Compilation units have a DW_AT_name that is a filename, not
18239 a source language identifier. */
18240 case DW_TAG_enumeration_type
:
18241 case DW_TAG_enumerator
:
18242 /* These tags always have simple identifiers already; no need
18243 to canonicalize them. */
18244 name
= DW_STRING (&attr
);
18248 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18251 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
, objfile
);
18256 case DW_AT_linkage_name
:
18257 case DW_AT_MIPS_linkage_name
:
18258 /* Note that both forms of linkage name might appear. We
18259 assume they will be the same, and we only store the last
18261 linkage_name
= DW_STRING (&attr
);
18264 has_low_pc_attr
= 1;
18265 lowpc
= attr
.value_as_address ();
18267 case DW_AT_high_pc
:
18268 has_high_pc_attr
= 1;
18269 highpc
= attr
.value_as_address ();
18270 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
18271 high_pc_relative
= 1;
18273 case DW_AT_location
:
18274 /* Support the .debug_loc offsets. */
18275 if (attr
.form_is_block ())
18277 d
.locdesc
= DW_BLOCK (&attr
);
18279 else if (attr
.form_is_section_offset ())
18281 dwarf2_complex_location_expr_complaint ();
18285 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18286 "partial symbol information");
18289 case DW_AT_external
:
18290 is_external
= DW_UNSND (&attr
);
18292 case DW_AT_declaration
:
18293 is_declaration
= DW_UNSND (&attr
);
18298 case DW_AT_abstract_origin
:
18299 case DW_AT_specification
:
18300 case DW_AT_extension
:
18301 has_specification
= 1;
18302 spec_offset
= attr
.get_ref_die_offset ();
18303 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18304 || cu
->per_cu
->is_dwz
);
18306 case DW_AT_sibling
:
18307 /* Ignore absolute siblings, they might point outside of
18308 the current compile unit. */
18309 if (attr
.form
== DW_FORM_ref_addr
)
18310 complaint (_("ignoring absolute DW_AT_sibling"));
18313 const gdb_byte
*buffer
= reader
->buffer
;
18314 sect_offset off
= attr
.get_ref_die_offset ();
18315 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18317 if (sibling_ptr
< info_ptr
)
18318 complaint (_("DW_AT_sibling points backwards"));
18319 else if (sibling_ptr
> reader
->buffer_end
)
18320 reader
->die_section
->overflow_complaint ();
18322 sibling
= sibling_ptr
;
18325 case DW_AT_byte_size
:
18328 case DW_AT_const_value
:
18329 has_const_value
= 1;
18331 case DW_AT_calling_convention
:
18332 /* DWARF doesn't provide a way to identify a program's source-level
18333 entry point. DW_AT_calling_convention attributes are only meant
18334 to describe functions' calling conventions.
18336 However, because it's a necessary piece of information in
18337 Fortran, and before DWARF 4 DW_CC_program was the only
18338 piece of debugging information whose definition refers to
18339 a 'main program' at all, several compilers marked Fortran
18340 main programs with DW_CC_program --- even when those
18341 functions use the standard calling conventions.
18343 Although DWARF now specifies a way to provide this
18344 information, we support this practice for backward
18346 if (DW_UNSND (&attr
) == DW_CC_program
18347 && cu
->language
== language_fortran
)
18348 main_subprogram
= 1;
18351 if (DW_UNSND (&attr
) == DW_INL_inlined
18352 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18353 may_be_inlined
= 1;
18357 if (tag
== DW_TAG_imported_unit
)
18359 d
.sect_off
= attr
.get_ref_die_offset ();
18360 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18361 || cu
->per_cu
->is_dwz
);
18365 case DW_AT_main_subprogram
:
18366 main_subprogram
= DW_UNSND (&attr
);
18371 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18372 but that requires a full DIE, so instead we just
18374 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18375 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18376 + (need_ranges_base
18380 /* Value of the DW_AT_ranges attribute is the offset in the
18381 .debug_ranges section. */
18382 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18393 /* For Ada, if both the name and the linkage name appear, we prefer
18394 the latter. This lets "catch exception" work better, regardless
18395 of the order in which the name and linkage name were emitted.
18396 Really, though, this is just a workaround for the fact that gdb
18397 doesn't store both the name and the linkage name. */
18398 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18399 name
= linkage_name
;
18401 if (high_pc_relative
)
18404 if (has_low_pc_attr
&& has_high_pc_attr
)
18406 /* When using the GNU linker, .gnu.linkonce. sections are used to
18407 eliminate duplicate copies of functions and vtables and such.
18408 The linker will arbitrarily choose one and discard the others.
18409 The AT_*_pc values for such functions refer to local labels in
18410 these sections. If the section from that file was discarded, the
18411 labels are not in the output, so the relocs get a value of 0.
18412 If this is a discarded function, mark the pc bounds as invalid,
18413 so that GDB will ignore it. */
18414 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18416 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18417 struct gdbarch
*gdbarch
= objfile
->arch ();
18419 complaint (_("DW_AT_low_pc %s is zero "
18420 "for DIE at %s [in module %s]"),
18421 paddress (gdbarch
, lowpc
),
18422 sect_offset_str (sect_off
),
18423 objfile_name (objfile
));
18425 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18426 else if (lowpc
>= highpc
)
18428 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18429 struct gdbarch
*gdbarch
= objfile
->arch ();
18431 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18432 "for DIE at %s [in module %s]"),
18433 paddress (gdbarch
, lowpc
),
18434 paddress (gdbarch
, highpc
),
18435 sect_offset_str (sect_off
),
18436 objfile_name (objfile
));
18445 /* Find a cached partial DIE at OFFSET in CU. */
18447 struct partial_die_info
*
18448 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18450 struct partial_die_info
*lookup_die
= NULL
;
18451 struct partial_die_info
part_die (sect_off
);
18453 lookup_die
= ((struct partial_die_info
*)
18454 htab_find_with_hash (partial_dies
, &part_die
,
18455 to_underlying (sect_off
)));
18460 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18461 except in the case of .debug_types DIEs which do not reference
18462 outside their CU (they do however referencing other types via
18463 DW_FORM_ref_sig8). */
18465 static const struct cu_partial_die_info
18466 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18468 struct dwarf2_per_objfile
*dwarf2_per_objfile
18469 = cu
->per_cu
->dwarf2_per_objfile
;
18470 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18471 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18472 struct partial_die_info
*pd
= NULL
;
18474 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18475 && cu
->header
.offset_in_cu_p (sect_off
))
18477 pd
= cu
->find_partial_die (sect_off
);
18480 /* We missed recording what we needed.
18481 Load all dies and try again. */
18482 per_cu
= cu
->per_cu
;
18486 /* TUs don't reference other CUs/TUs (except via type signatures). */
18487 if (cu
->per_cu
->is_debug_types
)
18489 error (_("Dwarf Error: Type Unit at offset %s contains"
18490 " external reference to offset %s [in module %s].\n"),
18491 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18492 bfd_get_filename (objfile
->obfd
));
18494 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18495 dwarf2_per_objfile
);
18497 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18498 load_partial_comp_unit (per_cu
);
18500 per_cu
->cu
->last_used
= 0;
18501 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18504 /* If we didn't find it, and not all dies have been loaded,
18505 load them all and try again. */
18507 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18509 per_cu
->load_all_dies
= 1;
18511 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18512 THIS_CU->cu may already be in use. So we can't just free it and
18513 replace its DIEs with the ones we read in. Instead, we leave those
18514 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18515 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18517 load_partial_comp_unit (per_cu
);
18519 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18523 internal_error (__FILE__
, __LINE__
,
18524 _("could not find partial DIE %s "
18525 "in cache [from module %s]\n"),
18526 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18527 return { per_cu
->cu
, pd
};
18530 /* See if we can figure out if the class lives in a namespace. We do
18531 this by looking for a member function; its demangled name will
18532 contain namespace info, if there is any. */
18535 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18536 struct dwarf2_cu
*cu
)
18538 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18539 what template types look like, because the demangler
18540 frequently doesn't give the same name as the debug info. We
18541 could fix this by only using the demangled name to get the
18542 prefix (but see comment in read_structure_type). */
18544 struct partial_die_info
*real_pdi
;
18545 struct partial_die_info
*child_pdi
;
18547 /* If this DIE (this DIE's specification, if any) has a parent, then
18548 we should not do this. We'll prepend the parent's fully qualified
18549 name when we create the partial symbol. */
18551 real_pdi
= struct_pdi
;
18552 while (real_pdi
->has_specification
)
18554 auto res
= find_partial_die (real_pdi
->spec_offset
,
18555 real_pdi
->spec_is_dwz
, cu
);
18556 real_pdi
= res
.pdi
;
18560 if (real_pdi
->die_parent
!= NULL
)
18563 for (child_pdi
= struct_pdi
->die_child
;
18565 child_pdi
= child_pdi
->die_sibling
)
18567 if (child_pdi
->tag
== DW_TAG_subprogram
18568 && child_pdi
->linkage_name
!= NULL
)
18570 gdb::unique_xmalloc_ptr
<char> actual_class_name
18571 (language_class_name_from_physname (cu
->language_defn
,
18572 child_pdi
->linkage_name
));
18573 if (actual_class_name
!= NULL
)
18575 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18576 struct_pdi
->name
= objfile
->intern (actual_class_name
.get ());
18583 /* Return true if a DIE with TAG may have the DW_AT_const_value
18587 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
18591 case DW_TAG_constant
:
18592 case DW_TAG_enumerator
:
18593 case DW_TAG_formal_parameter
:
18594 case DW_TAG_template_value_param
:
18595 case DW_TAG_variable
:
18603 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18605 /* Once we've fixed up a die, there's no point in doing so again.
18606 This also avoids a memory leak if we were to call
18607 guess_partial_die_structure_name multiple times. */
18611 /* If we found a reference attribute and the DIE has no name, try
18612 to find a name in the referred to DIE. */
18614 if (name
== NULL
&& has_specification
)
18616 struct partial_die_info
*spec_die
;
18618 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18619 spec_die
= res
.pdi
;
18622 spec_die
->fixup (cu
);
18624 if (spec_die
->name
)
18626 name
= spec_die
->name
;
18628 /* Copy DW_AT_external attribute if it is set. */
18629 if (spec_die
->is_external
)
18630 is_external
= spec_die
->is_external
;
18634 if (!has_const_value
&& has_specification
18635 && can_have_DW_AT_const_value_p (tag
))
18637 struct partial_die_info
*spec_die
;
18639 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18640 spec_die
= res
.pdi
;
18643 spec_die
->fixup (cu
);
18645 if (spec_die
->has_const_value
)
18647 /* Copy DW_AT_const_value attribute if it is set. */
18648 has_const_value
= spec_die
->has_const_value
;
18652 /* Set default names for some unnamed DIEs. */
18654 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18655 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18657 /* If there is no parent die to provide a namespace, and there are
18658 children, see if we can determine the namespace from their linkage
18660 if (cu
->language
== language_cplus
18661 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
18662 && die_parent
== NULL
18664 && (tag
== DW_TAG_class_type
18665 || tag
== DW_TAG_structure_type
18666 || tag
== DW_TAG_union_type
))
18667 guess_partial_die_structure_name (this, cu
);
18669 /* GCC might emit a nameless struct or union that has a linkage
18670 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18672 && (tag
== DW_TAG_class_type
18673 || tag
== DW_TAG_interface_type
18674 || tag
== DW_TAG_structure_type
18675 || tag
== DW_TAG_union_type
)
18676 && linkage_name
!= NULL
)
18678 gdb::unique_xmalloc_ptr
<char> demangled
18679 (gdb_demangle (linkage_name
, DMGL_TYPES
));
18680 if (demangled
!= nullptr)
18684 /* Strip any leading namespaces/classes, keep only the base name.
18685 DW_AT_name for named DIEs does not contain the prefixes. */
18686 base
= strrchr (demangled
.get (), ':');
18687 if (base
&& base
> demangled
.get () && base
[-1] == ':')
18690 base
= demangled
.get ();
18692 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18693 name
= objfile
->intern (base
);
18700 /* Read the .debug_loclists header contents from the given SECTION in the
18703 read_loclist_header (struct loclist_header
*header
,
18704 struct dwarf2_section_info
*section
)
18706 unsigned int bytes_read
;
18707 bfd
*abfd
= section
->get_bfd_owner ();
18708 const gdb_byte
*info_ptr
= section
->buffer
;
18709 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
18710 info_ptr
+= bytes_read
;
18711 header
->version
= read_2_bytes (abfd
, info_ptr
);
18713 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
18715 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
18717 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
18720 /* Return the DW_AT_loclists_base value for the CU. */
18722 lookup_loclist_base (struct dwarf2_cu
*cu
)
18724 /* For the .dwo unit, the loclist_base points to the first offset following
18725 the header. The header consists of the following entities-
18726 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
18728 2. version (2 bytes)
18729 3. address size (1 byte)
18730 4. segment selector size (1 byte)
18731 5. offset entry count (4 bytes)
18732 These sizes are derived as per the DWARFv5 standard. */
18733 if (cu
->dwo_unit
!= nullptr)
18735 if (cu
->header
.initial_length_size
== 4)
18736 return LOCLIST_HEADER_SIZE32
;
18737 return LOCLIST_HEADER_SIZE64
;
18739 return cu
->loclist_base
;
18742 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
18743 array of offsets in the .debug_loclists section. */
18745 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
18747 struct dwarf2_per_objfile
*dwarf2_per_objfile
18748 = cu
->per_cu
->dwarf2_per_objfile
;
18749 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18750 bfd
*abfd
= objfile
->obfd
;
18751 ULONGEST loclist_base
= lookup_loclist_base (cu
);
18752 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18754 section
->read (objfile
);
18755 if (section
->buffer
== NULL
)
18756 complaint (_("DW_FORM_loclistx used without .debug_loclists "
18757 "section [in module %s]"), objfile_name (objfile
));
18758 struct loclist_header header
;
18759 read_loclist_header (&header
, section
);
18760 if (loclist_index
>= header
.offset_entry_count
)
18761 complaint (_("DW_FORM_loclistx pointing outside of "
18762 ".debug_loclists offset array [in module %s]"),
18763 objfile_name (objfile
));
18764 if (loclist_base
+ loclist_index
* cu
->header
.offset_size
18766 complaint (_("DW_FORM_loclistx pointing outside of "
18767 ".debug_loclists section [in module %s]"),
18768 objfile_name (objfile
));
18769 const gdb_byte
*info_ptr
18770 = section
->buffer
+ loclist_base
+ loclist_index
* cu
->header
.offset_size
;
18772 if (cu
->header
.offset_size
== 4)
18773 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
18775 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
18778 /* Process the attributes that had to be skipped in the first round. These
18779 attributes are the ones that need str_offsets_base or addr_base attributes.
18780 They could not have been processed in the first round, because at the time
18781 the values of str_offsets_base or addr_base may not have been known. */
18783 read_attribute_reprocess (const struct die_reader_specs
*reader
,
18784 struct attribute
*attr
)
18786 struct dwarf2_cu
*cu
= reader
->cu
;
18787 switch (attr
->form
)
18789 case DW_FORM_addrx
:
18790 case DW_FORM_GNU_addr_index
:
18791 DW_ADDR (attr
) = read_addr_index (cu
, DW_UNSND (attr
));
18793 case DW_FORM_loclistx
:
18794 DW_UNSND (attr
) = read_loclist_index (cu
, DW_UNSND (attr
));
18797 case DW_FORM_strx1
:
18798 case DW_FORM_strx2
:
18799 case DW_FORM_strx3
:
18800 case DW_FORM_strx4
:
18801 case DW_FORM_GNU_str_index
:
18803 unsigned int str_index
= DW_UNSND (attr
);
18804 if (reader
->dwo_file
!= NULL
)
18806 DW_STRING (attr
) = read_dwo_str_index (reader
, str_index
);
18807 DW_STRING_IS_CANONICAL (attr
) = 0;
18811 DW_STRING (attr
) = read_stub_str_index (cu
, str_index
);
18812 DW_STRING_IS_CANONICAL (attr
) = 0;
18817 gdb_assert_not_reached (_("Unexpected DWARF form."));
18821 /* Read an attribute value described by an attribute form. */
18823 static const gdb_byte
*
18824 read_attribute_value (const struct die_reader_specs
*reader
,
18825 struct attribute
*attr
, unsigned form
,
18826 LONGEST implicit_const
, const gdb_byte
*info_ptr
,
18827 bool *need_reprocess
)
18829 struct dwarf2_cu
*cu
= reader
->cu
;
18830 struct dwarf2_per_objfile
*dwarf2_per_objfile
18831 = cu
->per_cu
->dwarf2_per_objfile
;
18832 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18833 bfd
*abfd
= reader
->abfd
;
18834 struct comp_unit_head
*cu_header
= &cu
->header
;
18835 unsigned int bytes_read
;
18836 struct dwarf_block
*blk
;
18837 *need_reprocess
= false;
18839 attr
->form
= (enum dwarf_form
) form
;
18842 case DW_FORM_ref_addr
:
18843 if (cu
->header
.version
== 2)
18844 DW_UNSND (attr
) = cu
->header
.read_address (abfd
, info_ptr
,
18847 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
,
18849 info_ptr
+= bytes_read
;
18851 case DW_FORM_GNU_ref_alt
:
18852 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
18853 info_ptr
+= bytes_read
;
18857 struct gdbarch
*gdbarch
= objfile
->arch ();
18858 DW_ADDR (attr
) = cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
18859 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18860 info_ptr
+= bytes_read
;
18863 case DW_FORM_block2
:
18864 blk
= dwarf_alloc_block (cu
);
18865 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18867 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18868 info_ptr
+= blk
->size
;
18869 DW_BLOCK (attr
) = blk
;
18871 case DW_FORM_block4
:
18872 blk
= dwarf_alloc_block (cu
);
18873 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18875 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18876 info_ptr
+= blk
->size
;
18877 DW_BLOCK (attr
) = blk
;
18879 case DW_FORM_data2
:
18880 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18883 case DW_FORM_data4
:
18884 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18887 case DW_FORM_data8
:
18888 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18891 case DW_FORM_data16
:
18892 blk
= dwarf_alloc_block (cu
);
18894 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18896 DW_BLOCK (attr
) = blk
;
18898 case DW_FORM_sec_offset
:
18899 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
18900 info_ptr
+= bytes_read
;
18902 case DW_FORM_loclistx
:
18904 *need_reprocess
= true;
18905 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18906 info_ptr
+= bytes_read
;
18909 case DW_FORM_string
:
18910 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18911 DW_STRING_IS_CANONICAL (attr
) = 0;
18912 info_ptr
+= bytes_read
;
18915 if (!cu
->per_cu
->is_dwz
)
18917 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18918 abfd
, info_ptr
, cu_header
,
18920 DW_STRING_IS_CANONICAL (attr
) = 0;
18921 info_ptr
+= bytes_read
;
18925 case DW_FORM_line_strp
:
18926 if (!cu
->per_cu
->is_dwz
)
18929 = dwarf2_per_objfile
->read_line_string (info_ptr
, cu_header
,
18931 DW_STRING_IS_CANONICAL (attr
) = 0;
18932 info_ptr
+= bytes_read
;
18936 case DW_FORM_GNU_strp_alt
:
18938 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18939 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
18942 DW_STRING (attr
) = dwz
->read_string (objfile
, str_offset
);
18943 DW_STRING_IS_CANONICAL (attr
) = 0;
18944 info_ptr
+= bytes_read
;
18947 case DW_FORM_exprloc
:
18948 case DW_FORM_block
:
18949 blk
= dwarf_alloc_block (cu
);
18950 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18951 info_ptr
+= bytes_read
;
18952 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18953 info_ptr
+= blk
->size
;
18954 DW_BLOCK (attr
) = blk
;
18956 case DW_FORM_block1
:
18957 blk
= dwarf_alloc_block (cu
);
18958 blk
->size
= read_1_byte (abfd
, info_ptr
);
18960 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18961 info_ptr
+= blk
->size
;
18962 DW_BLOCK (attr
) = blk
;
18964 case DW_FORM_data1
:
18965 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18969 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18972 case DW_FORM_flag_present
:
18973 DW_UNSND (attr
) = 1;
18975 case DW_FORM_sdata
:
18976 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
18977 info_ptr
+= bytes_read
;
18979 case DW_FORM_udata
:
18980 case DW_FORM_rnglistx
:
18981 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18982 info_ptr
+= bytes_read
;
18985 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18986 + read_1_byte (abfd
, info_ptr
));
18990 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18991 + read_2_bytes (abfd
, info_ptr
));
18995 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18996 + read_4_bytes (abfd
, info_ptr
));
19000 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19001 + read_8_bytes (abfd
, info_ptr
));
19004 case DW_FORM_ref_sig8
:
19005 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19008 case DW_FORM_ref_udata
:
19009 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19010 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19011 info_ptr
+= bytes_read
;
19013 case DW_FORM_indirect
:
19014 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19015 info_ptr
+= bytes_read
;
19016 if (form
== DW_FORM_implicit_const
)
19018 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19019 info_ptr
+= bytes_read
;
19021 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19022 info_ptr
, need_reprocess
);
19024 case DW_FORM_implicit_const
:
19025 DW_SND (attr
) = implicit_const
;
19027 case DW_FORM_addrx
:
19028 case DW_FORM_GNU_addr_index
:
19029 *need_reprocess
= true;
19030 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19031 info_ptr
+= bytes_read
;
19034 case DW_FORM_strx1
:
19035 case DW_FORM_strx2
:
19036 case DW_FORM_strx3
:
19037 case DW_FORM_strx4
:
19038 case DW_FORM_GNU_str_index
:
19040 ULONGEST str_index
;
19041 if (form
== DW_FORM_strx1
)
19043 str_index
= read_1_byte (abfd
, info_ptr
);
19046 else if (form
== DW_FORM_strx2
)
19048 str_index
= read_2_bytes (abfd
, info_ptr
);
19051 else if (form
== DW_FORM_strx3
)
19053 str_index
= read_3_bytes (abfd
, info_ptr
);
19056 else if (form
== DW_FORM_strx4
)
19058 str_index
= read_4_bytes (abfd
, info_ptr
);
19063 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19064 info_ptr
+= bytes_read
;
19066 *need_reprocess
= true;
19067 DW_UNSND (attr
) = str_index
;
19071 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19072 dwarf_form_name (form
),
19073 bfd_get_filename (abfd
));
19077 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
19078 attr
->form
= DW_FORM_GNU_ref_alt
;
19080 /* We have seen instances where the compiler tried to emit a byte
19081 size attribute of -1 which ended up being encoded as an unsigned
19082 0xffffffff. Although 0xffffffff is technically a valid size value,
19083 an object of this size seems pretty unlikely so we can relatively
19084 safely treat these cases as if the size attribute was invalid and
19085 treat them as zero by default. */
19086 if (attr
->name
== DW_AT_byte_size
19087 && form
== DW_FORM_data4
19088 && DW_UNSND (attr
) >= 0xffffffff)
19091 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19092 hex_string (DW_UNSND (attr
)));
19093 DW_UNSND (attr
) = 0;
19099 /* Read an attribute described by an abbreviated attribute. */
19101 static const gdb_byte
*
19102 read_attribute (const struct die_reader_specs
*reader
,
19103 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19104 const gdb_byte
*info_ptr
, bool *need_reprocess
)
19106 attr
->name
= abbrev
->name
;
19107 return read_attribute_value (reader
, attr
, abbrev
->form
,
19108 abbrev
->implicit_const
, info_ptr
,
19112 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19114 static const char *
19115 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19116 LONGEST str_offset
)
19118 return dwarf2_per_objfile
->str
.read_string (dwarf2_per_objfile
->objfile
,
19119 str_offset
, "DW_FORM_strp");
19122 /* Return pointer to string at .debug_str offset as read from BUF.
19123 BUF is assumed to be in a compilation unit described by CU_HEADER.
19124 Return *BYTES_READ_PTR count of bytes read from BUF. */
19126 static const char *
19127 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19128 const gdb_byte
*buf
,
19129 const struct comp_unit_head
*cu_header
,
19130 unsigned int *bytes_read_ptr
)
19132 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19134 return read_indirect_string_at_offset (dwarf2_per_objfile
, str_offset
);
19140 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
19141 const struct comp_unit_head
*cu_header
,
19142 unsigned int *bytes_read_ptr
)
19144 bfd
*abfd
= objfile
->obfd
;
19145 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19147 return line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
19150 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19151 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
19152 ADDR_SIZE is the size of addresses from the CU header. */
19155 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19156 unsigned int addr_index
, gdb::optional
<ULONGEST
> addr_base
,
19159 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19160 bfd
*abfd
= objfile
->obfd
;
19161 const gdb_byte
*info_ptr
;
19162 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
19164 dwarf2_per_objfile
->addr
.read (objfile
);
19165 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19166 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19167 objfile_name (objfile
));
19168 if (addr_base_or_zero
+ addr_index
* addr_size
19169 >= dwarf2_per_objfile
->addr
.size
)
19170 error (_("DW_FORM_addr_index pointing outside of "
19171 ".debug_addr section [in module %s]"),
19172 objfile_name (objfile
));
19173 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19174 + addr_base_or_zero
+ addr_index
* addr_size
);
19175 if (addr_size
== 4)
19176 return bfd_get_32 (abfd
, info_ptr
);
19178 return bfd_get_64 (abfd
, info_ptr
);
19181 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19184 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19186 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19187 cu
->addr_base
, cu
->header
.addr_size
);
19190 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19193 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19194 unsigned int *bytes_read
)
19196 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19197 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19199 return read_addr_index (cu
, addr_index
);
19205 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
, unsigned int addr_index
)
19207 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19208 struct dwarf2_cu
*cu
= per_cu
->cu
;
19209 gdb::optional
<ULONGEST
> addr_base
;
19212 /* We need addr_base and addr_size.
19213 If we don't have PER_CU->cu, we have to get it.
19214 Nasty, but the alternative is storing the needed info in PER_CU,
19215 which at this point doesn't seem justified: it's not clear how frequently
19216 it would get used and it would increase the size of every PER_CU.
19217 Entry points like dwarf2_per_cu_addr_size do a similar thing
19218 so we're not in uncharted territory here.
19219 Alas we need to be a bit more complicated as addr_base is contained
19222 We don't need to read the entire CU(/TU).
19223 We just need the header and top level die.
19225 IWBN to use the aging mechanism to let us lazily later discard the CU.
19226 For now we skip this optimization. */
19230 addr_base
= cu
->addr_base
;
19231 addr_size
= cu
->header
.addr_size
;
19235 cutu_reader
reader (per_cu
, NULL
, 0, false);
19236 addr_base
= reader
.cu
->addr_base
;
19237 addr_size
= reader
.cu
->header
.addr_size
;
19240 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19244 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
19245 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
19248 static const char *
19249 read_str_index (struct dwarf2_cu
*cu
,
19250 struct dwarf2_section_info
*str_section
,
19251 struct dwarf2_section_info
*str_offsets_section
,
19252 ULONGEST str_offsets_base
, ULONGEST str_index
)
19254 struct dwarf2_per_objfile
*dwarf2_per_objfile
19255 = cu
->per_cu
->dwarf2_per_objfile
;
19256 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19257 const char *objf_name
= objfile_name (objfile
);
19258 bfd
*abfd
= objfile
->obfd
;
19259 const gdb_byte
*info_ptr
;
19260 ULONGEST str_offset
;
19261 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19263 str_section
->read (objfile
);
19264 str_offsets_section
->read (objfile
);
19265 if (str_section
->buffer
== NULL
)
19266 error (_("%s used without %s section"
19267 " in CU at offset %s [in module %s]"),
19268 form_name
, str_section
->get_name (),
19269 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19270 if (str_offsets_section
->buffer
== NULL
)
19271 error (_("%s used without %s section"
19272 " in CU at offset %s [in module %s]"),
19273 form_name
, str_section
->get_name (),
19274 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19275 info_ptr
= (str_offsets_section
->buffer
19277 + str_index
* cu
->header
.offset_size
);
19278 if (cu
->header
.offset_size
== 4)
19279 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19281 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19282 if (str_offset
>= str_section
->size
)
19283 error (_("Offset from %s pointing outside of"
19284 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19285 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19286 return (const char *) (str_section
->buffer
+ str_offset
);
19289 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
19291 static const char *
19292 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19294 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
19295 ? reader
->cu
->header
.addr_size
: 0;
19296 return read_str_index (reader
->cu
,
19297 &reader
->dwo_file
->sections
.str
,
19298 &reader
->dwo_file
->sections
.str_offsets
,
19299 str_offsets_base
, str_index
);
19302 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
19304 static const char *
19305 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
19307 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19308 const char *objf_name
= objfile_name (objfile
);
19309 static const char form_name
[] = "DW_FORM_GNU_str_index";
19310 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
19312 if (!cu
->str_offsets_base
.has_value ())
19313 error (_("%s used in Fission stub without %s"
19314 " in CU at offset 0x%lx [in module %s]"),
19315 form_name
, str_offsets_attr_name
,
19316 (long) cu
->header
.offset_size
, objf_name
);
19318 return read_str_index (cu
,
19319 &cu
->per_cu
->dwarf2_per_objfile
->str
,
19320 &cu
->per_cu
->dwarf2_per_objfile
->str_offsets
,
19321 *cu
->str_offsets_base
, str_index
);
19324 /* Return the length of an LEB128 number in BUF. */
19327 leb128_size (const gdb_byte
*buf
)
19329 const gdb_byte
*begin
= buf
;
19335 if ((byte
& 128) == 0)
19336 return buf
- begin
;
19341 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19350 cu
->language
= language_c
;
19353 case DW_LANG_C_plus_plus
:
19354 case DW_LANG_C_plus_plus_11
:
19355 case DW_LANG_C_plus_plus_14
:
19356 cu
->language
= language_cplus
;
19359 cu
->language
= language_d
;
19361 case DW_LANG_Fortran77
:
19362 case DW_LANG_Fortran90
:
19363 case DW_LANG_Fortran95
:
19364 case DW_LANG_Fortran03
:
19365 case DW_LANG_Fortran08
:
19366 cu
->language
= language_fortran
;
19369 cu
->language
= language_go
;
19371 case DW_LANG_Mips_Assembler
:
19372 cu
->language
= language_asm
;
19374 case DW_LANG_Ada83
:
19375 case DW_LANG_Ada95
:
19376 cu
->language
= language_ada
;
19378 case DW_LANG_Modula2
:
19379 cu
->language
= language_m2
;
19381 case DW_LANG_Pascal83
:
19382 cu
->language
= language_pascal
;
19385 cu
->language
= language_objc
;
19388 case DW_LANG_Rust_old
:
19389 cu
->language
= language_rust
;
19391 case DW_LANG_Cobol74
:
19392 case DW_LANG_Cobol85
:
19394 cu
->language
= language_minimal
;
19397 cu
->language_defn
= language_def (cu
->language
);
19400 /* Return the named attribute or NULL if not there. */
19402 static struct attribute
*
19403 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19408 struct attribute
*spec
= NULL
;
19410 for (i
= 0; i
< die
->num_attrs
; ++i
)
19412 if (die
->attrs
[i
].name
== name
)
19413 return &die
->attrs
[i
];
19414 if (die
->attrs
[i
].name
== DW_AT_specification
19415 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19416 spec
= &die
->attrs
[i
];
19422 die
= follow_die_ref (die
, spec
, &cu
);
19428 /* Return the string associated with a string-typed attribute, or NULL if it
19429 is either not found or is of an incorrect type. */
19431 static const char *
19432 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19434 struct attribute
*attr
;
19435 const char *str
= NULL
;
19437 attr
= dwarf2_attr (die
, name
, cu
);
19441 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19442 || attr
->form
== DW_FORM_string
19443 || attr
->form
== DW_FORM_strx
19444 || attr
->form
== DW_FORM_strx1
19445 || attr
->form
== DW_FORM_strx2
19446 || attr
->form
== DW_FORM_strx3
19447 || attr
->form
== DW_FORM_strx4
19448 || attr
->form
== DW_FORM_GNU_str_index
19449 || attr
->form
== DW_FORM_GNU_strp_alt
)
19450 str
= DW_STRING (attr
);
19452 complaint (_("string type expected for attribute %s for "
19453 "DIE at %s in module %s"),
19454 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19455 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19461 /* Return the dwo name or NULL if not present. If present, it is in either
19462 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
19463 static const char *
19464 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19466 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
19467 if (dwo_name
== nullptr)
19468 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
19472 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19473 and holds a non-zero value. This function should only be used for
19474 DW_FORM_flag or DW_FORM_flag_present attributes. */
19477 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19479 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19481 return (attr
&& DW_UNSND (attr
));
19485 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19487 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19488 which value is non-zero. However, we have to be careful with
19489 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19490 (via dwarf2_flag_true_p) follows this attribute. So we may
19491 end up accidently finding a declaration attribute that belongs
19492 to a different DIE referenced by the specification attribute,
19493 even though the given DIE does not have a declaration attribute. */
19494 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19495 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19498 /* Return the die giving the specification for DIE, if there is
19499 one. *SPEC_CU is the CU containing DIE on input, and the CU
19500 containing the return value on output. If there is no
19501 specification, but there is an abstract origin, that is
19504 static struct die_info
*
19505 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19507 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19510 if (spec_attr
== NULL
)
19511 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19513 if (spec_attr
== NULL
)
19516 return follow_die_ref (die
, spec_attr
, spec_cu
);
19519 /* Stub for free_line_header to match void * callback types. */
19522 free_line_header_voidp (void *arg
)
19524 struct line_header
*lh
= (struct line_header
*) arg
;
19529 /* A convenience function to find the proper .debug_line section for a CU. */
19531 static struct dwarf2_section_info
*
19532 get_debug_line_section (struct dwarf2_cu
*cu
)
19534 struct dwarf2_section_info
*section
;
19535 struct dwarf2_per_objfile
*dwarf2_per_objfile
19536 = cu
->per_cu
->dwarf2_per_objfile
;
19538 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19540 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19541 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19542 else if (cu
->per_cu
->is_dwz
)
19544 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19546 section
= &dwz
->line
;
19549 section
= &dwarf2_per_objfile
->line
;
19554 /* Read the statement program header starting at OFFSET in
19555 .debug_line, or .debug_line.dwo. Return a pointer
19556 to a struct line_header, allocated using xmalloc.
19557 Returns NULL if there is a problem reading the header, e.g., if it
19558 has a version we don't understand.
19560 NOTE: the strings in the include directory and file name tables of
19561 the returned object point into the dwarf line section buffer,
19562 and must not be freed. */
19564 static line_header_up
19565 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
19567 struct dwarf2_section_info
*section
;
19568 struct dwarf2_per_objfile
*dwarf2_per_objfile
19569 = cu
->per_cu
->dwarf2_per_objfile
;
19571 section
= get_debug_line_section (cu
);
19572 section
->read (dwarf2_per_objfile
->objfile
);
19573 if (section
->buffer
== NULL
)
19575 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19576 complaint (_("missing .debug_line.dwo section"));
19578 complaint (_("missing .debug_line section"));
19582 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
19583 dwarf2_per_objfile
, section
,
19587 /* Subroutine of dwarf_decode_lines to simplify it.
19588 Return the file name of the psymtab for the given file_entry.
19589 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19590 If space for the result is malloc'd, *NAME_HOLDER will be set.
19591 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
19593 static const char *
19594 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
19595 const dwarf2_psymtab
*pst
,
19596 const char *comp_dir
,
19597 gdb::unique_xmalloc_ptr
<char> *name_holder
)
19599 const char *include_name
= fe
.name
;
19600 const char *include_name_to_compare
= include_name
;
19601 const char *pst_filename
;
19604 const char *dir_name
= fe
.include_dir (lh
);
19606 gdb::unique_xmalloc_ptr
<char> hold_compare
;
19607 if (!IS_ABSOLUTE_PATH (include_name
)
19608 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
19610 /* Avoid creating a duplicate psymtab for PST.
19611 We do this by comparing INCLUDE_NAME and PST_FILENAME.
19612 Before we do the comparison, however, we need to account
19613 for DIR_NAME and COMP_DIR.
19614 First prepend dir_name (if non-NULL). If we still don't
19615 have an absolute path prepend comp_dir (if non-NULL).
19616 However, the directory we record in the include-file's
19617 psymtab does not contain COMP_DIR (to match the
19618 corresponding symtab(s)).
19623 bash$ gcc -g ./hello.c
19624 include_name = "hello.c"
19626 DW_AT_comp_dir = comp_dir = "/tmp"
19627 DW_AT_name = "./hello.c"
19631 if (dir_name
!= NULL
)
19633 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
19634 include_name
, (char *) NULL
));
19635 include_name
= name_holder
->get ();
19636 include_name_to_compare
= include_name
;
19638 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
19640 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
19641 include_name
, (char *) NULL
));
19642 include_name_to_compare
= hold_compare
.get ();
19646 pst_filename
= pst
->filename
;
19647 gdb::unique_xmalloc_ptr
<char> copied_name
;
19648 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
19650 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
19651 pst_filename
, (char *) NULL
));
19652 pst_filename
= copied_name
.get ();
19655 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
19659 return include_name
;
19662 /* State machine to track the state of the line number program. */
19664 class lnp_state_machine
19667 /* Initialize a machine state for the start of a line number
19669 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
19670 bool record_lines_p
);
19672 file_entry
*current_file ()
19674 /* lh->file_names is 0-based, but the file name numbers in the
19675 statement program are 1-based. */
19676 return m_line_header
->file_name_at (m_file
);
19679 /* Record the line in the state machine. END_SEQUENCE is true if
19680 we're processing the end of a sequence. */
19681 void record_line (bool end_sequence
);
19683 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
19684 nop-out rest of the lines in this sequence. */
19685 void check_line_address (struct dwarf2_cu
*cu
,
19686 const gdb_byte
*line_ptr
,
19687 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
19689 void handle_set_discriminator (unsigned int discriminator
)
19691 m_discriminator
= discriminator
;
19692 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
19695 /* Handle DW_LNE_set_address. */
19696 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
19699 address
+= baseaddr
;
19700 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
19703 /* Handle DW_LNS_advance_pc. */
19704 void handle_advance_pc (CORE_ADDR adjust
);
19706 /* Handle a special opcode. */
19707 void handle_special_opcode (unsigned char op_code
);
19709 /* Handle DW_LNS_advance_line. */
19710 void handle_advance_line (int line_delta
)
19712 advance_line (line_delta
);
19715 /* Handle DW_LNS_set_file. */
19716 void handle_set_file (file_name_index file
);
19718 /* Handle DW_LNS_negate_stmt. */
19719 void handle_negate_stmt ()
19721 m_is_stmt
= !m_is_stmt
;
19724 /* Handle DW_LNS_const_add_pc. */
19725 void handle_const_add_pc ();
19727 /* Handle DW_LNS_fixed_advance_pc. */
19728 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
19730 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19734 /* Handle DW_LNS_copy. */
19735 void handle_copy ()
19737 record_line (false);
19738 m_discriminator
= 0;
19741 /* Handle DW_LNE_end_sequence. */
19742 void handle_end_sequence ()
19744 m_currently_recording_lines
= true;
19748 /* Advance the line by LINE_DELTA. */
19749 void advance_line (int line_delta
)
19751 m_line
+= line_delta
;
19753 if (line_delta
!= 0)
19754 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19757 struct dwarf2_cu
*m_cu
;
19759 gdbarch
*m_gdbarch
;
19761 /* True if we're recording lines.
19762 Otherwise we're building partial symtabs and are just interested in
19763 finding include files mentioned by the line number program. */
19764 bool m_record_lines_p
;
19766 /* The line number header. */
19767 line_header
*m_line_header
;
19769 /* These are part of the standard DWARF line number state machine,
19770 and initialized according to the DWARF spec. */
19772 unsigned char m_op_index
= 0;
19773 /* The line table index of the current file. */
19774 file_name_index m_file
= 1;
19775 unsigned int m_line
= 1;
19777 /* These are initialized in the constructor. */
19779 CORE_ADDR m_address
;
19781 unsigned int m_discriminator
;
19783 /* Additional bits of state we need to track. */
19785 /* The last file that we called dwarf2_start_subfile for.
19786 This is only used for TLLs. */
19787 unsigned int m_last_file
= 0;
19788 /* The last file a line number was recorded for. */
19789 struct subfile
*m_last_subfile
= NULL
;
19791 /* When true, record the lines we decode. */
19792 bool m_currently_recording_lines
= false;
19794 /* The last line number that was recorded, used to coalesce
19795 consecutive entries for the same line. This can happen, for
19796 example, when discriminators are present. PR 17276. */
19797 unsigned int m_last_line
= 0;
19798 bool m_line_has_non_zero_discriminator
= false;
19802 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
19804 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
19805 / m_line_header
->maximum_ops_per_instruction
)
19806 * m_line_header
->minimum_instruction_length
);
19807 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19808 m_op_index
= ((m_op_index
+ adjust
)
19809 % m_line_header
->maximum_ops_per_instruction
);
19813 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
19815 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
19816 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
19817 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
19818 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
19819 / m_line_header
->maximum_ops_per_instruction
)
19820 * m_line_header
->minimum_instruction_length
);
19821 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19822 m_op_index
= ((m_op_index
+ adj_opcode_d
)
19823 % m_line_header
->maximum_ops_per_instruction
);
19825 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
19826 advance_line (line_delta
);
19827 record_line (false);
19828 m_discriminator
= 0;
19832 lnp_state_machine::handle_set_file (file_name_index file
)
19836 const file_entry
*fe
= current_file ();
19838 dwarf2_debug_line_missing_file_complaint ();
19839 else if (m_record_lines_p
)
19841 const char *dir
= fe
->include_dir (m_line_header
);
19843 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
19844 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19845 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
19850 lnp_state_machine::handle_const_add_pc ()
19853 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
19856 = (((m_op_index
+ adjust
)
19857 / m_line_header
->maximum_ops_per_instruction
)
19858 * m_line_header
->minimum_instruction_length
);
19860 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19861 m_op_index
= ((m_op_index
+ adjust
)
19862 % m_line_header
->maximum_ops_per_instruction
);
19865 /* Return non-zero if we should add LINE to the line number table.
19866 LINE is the line to add, LAST_LINE is the last line that was added,
19867 LAST_SUBFILE is the subfile for LAST_LINE.
19868 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
19869 had a non-zero discriminator.
19871 We have to be careful in the presence of discriminators.
19872 E.g., for this line:
19874 for (i = 0; i < 100000; i++);
19876 clang can emit four line number entries for that one line,
19877 each with a different discriminator.
19878 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
19880 However, we want gdb to coalesce all four entries into one.
19881 Otherwise the user could stepi into the middle of the line and
19882 gdb would get confused about whether the pc really was in the
19883 middle of the line.
19885 Things are further complicated by the fact that two consecutive
19886 line number entries for the same line is a heuristic used by gcc
19887 to denote the end of the prologue. So we can't just discard duplicate
19888 entries, we have to be selective about it. The heuristic we use is
19889 that we only collapse consecutive entries for the same line if at least
19890 one of those entries has a non-zero discriminator. PR 17276.
19892 Note: Addresses in the line number state machine can never go backwards
19893 within one sequence, thus this coalescing is ok. */
19896 dwarf_record_line_p (struct dwarf2_cu
*cu
,
19897 unsigned int line
, unsigned int last_line
,
19898 int line_has_non_zero_discriminator
,
19899 struct subfile
*last_subfile
)
19901 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
19903 if (line
!= last_line
)
19905 /* Same line for the same file that we've seen already.
19906 As a last check, for pr 17276, only record the line if the line
19907 has never had a non-zero discriminator. */
19908 if (!line_has_non_zero_discriminator
)
19913 /* Use the CU's builder to record line number LINE beginning at
19914 address ADDRESS in the line table of subfile SUBFILE. */
19917 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19918 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
19919 struct dwarf2_cu
*cu
)
19921 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
19923 if (dwarf_line_debug
)
19925 fprintf_unfiltered (gdb_stdlog
,
19926 "Recording line %u, file %s, address %s\n",
19927 line
, lbasename (subfile
->name
),
19928 paddress (gdbarch
, address
));
19932 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
19935 /* Subroutine of dwarf_decode_lines_1 to simplify it.
19936 Mark the end of a set of line number records.
19937 The arguments are the same as for dwarf_record_line_1.
19938 If SUBFILE is NULL the request is ignored. */
19941 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19942 CORE_ADDR address
, struct dwarf2_cu
*cu
)
19944 if (subfile
== NULL
)
19947 if (dwarf_line_debug
)
19949 fprintf_unfiltered (gdb_stdlog
,
19950 "Finishing current line, file %s, address %s\n",
19951 lbasename (subfile
->name
),
19952 paddress (gdbarch
, address
));
19955 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
19959 lnp_state_machine::record_line (bool end_sequence
)
19961 if (dwarf_line_debug
)
19963 fprintf_unfiltered (gdb_stdlog
,
19964 "Processing actual line %u: file %u,"
19965 " address %s, is_stmt %u, discrim %u%s\n",
19967 paddress (m_gdbarch
, m_address
),
19968 m_is_stmt
, m_discriminator
,
19969 (end_sequence
? "\t(end sequence)" : ""));
19972 file_entry
*fe
= current_file ();
19975 dwarf2_debug_line_missing_file_complaint ();
19976 /* For now we ignore lines not starting on an instruction boundary.
19977 But not when processing end_sequence for compatibility with the
19978 previous version of the code. */
19979 else if (m_op_index
== 0 || end_sequence
)
19981 fe
->included_p
= 1;
19982 if (m_record_lines_p
)
19984 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
19987 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
19988 m_currently_recording_lines
? m_cu
: nullptr);
19993 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
19995 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
19996 m_line_has_non_zero_discriminator
,
19999 buildsym_compunit
*builder
= m_cu
->get_builder ();
20000 dwarf_record_line_1 (m_gdbarch
,
20001 builder
->get_current_subfile (),
20002 m_line
, m_address
, is_stmt
,
20003 m_currently_recording_lines
? m_cu
: nullptr);
20005 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20006 m_last_line
= m_line
;
20012 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20013 line_header
*lh
, bool record_lines_p
)
20017 m_record_lines_p
= record_lines_p
;
20018 m_line_header
= lh
;
20020 m_currently_recording_lines
= true;
20022 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20023 was a line entry for it so that the backend has a chance to adjust it
20024 and also record it in case it needs it. This is currently used by MIPS
20025 code, cf. `mips_adjust_dwarf2_line'. */
20026 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20027 m_is_stmt
= lh
->default_is_stmt
;
20028 m_discriminator
= 0;
20032 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20033 const gdb_byte
*line_ptr
,
20034 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20036 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20037 the pc range of the CU. However, we restrict the test to only ADDRESS
20038 values of zero to preserve GDB's previous behaviour which is to handle
20039 the specific case of a function being GC'd by the linker. */
20041 if (address
== 0 && address
< unrelocated_lowpc
)
20043 /* This line table is for a function which has been
20044 GCd by the linker. Ignore it. PR gdb/12528 */
20046 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20047 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20049 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20050 line_offset
, objfile_name (objfile
));
20051 m_currently_recording_lines
= false;
20052 /* Note: m_currently_recording_lines is left as false until we see
20053 DW_LNE_end_sequence. */
20057 /* Subroutine of dwarf_decode_lines to simplify it.
20058 Process the line number information in LH.
20059 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20060 program in order to set included_p for every referenced header. */
20063 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20064 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20066 const gdb_byte
*line_ptr
, *extended_end
;
20067 const gdb_byte
*line_end
;
20068 unsigned int bytes_read
, extended_len
;
20069 unsigned char op_code
, extended_op
;
20070 CORE_ADDR baseaddr
;
20071 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20072 bfd
*abfd
= objfile
->obfd
;
20073 struct gdbarch
*gdbarch
= objfile
->arch ();
20074 /* True if we're recording line info (as opposed to building partial
20075 symtabs and just interested in finding include files mentioned by
20076 the line number program). */
20077 bool record_lines_p
= !decode_for_pst_p
;
20079 baseaddr
= objfile
->text_section_offset ();
20081 line_ptr
= lh
->statement_program_start
;
20082 line_end
= lh
->statement_program_end
;
20084 /* Read the statement sequences until there's nothing left. */
20085 while (line_ptr
< line_end
)
20087 /* The DWARF line number program state machine. Reset the state
20088 machine at the start of each sequence. */
20089 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20090 bool end_sequence
= false;
20092 if (record_lines_p
)
20094 /* Start a subfile for the current file of the state
20096 const file_entry
*fe
= state_machine
.current_file ();
20099 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20102 /* Decode the table. */
20103 while (line_ptr
< line_end
&& !end_sequence
)
20105 op_code
= read_1_byte (abfd
, line_ptr
);
20108 if (op_code
>= lh
->opcode_base
)
20110 /* Special opcode. */
20111 state_machine
.handle_special_opcode (op_code
);
20113 else switch (op_code
)
20115 case DW_LNS_extended_op
:
20116 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20118 line_ptr
+= bytes_read
;
20119 extended_end
= line_ptr
+ extended_len
;
20120 extended_op
= read_1_byte (abfd
, line_ptr
);
20122 switch (extended_op
)
20124 case DW_LNE_end_sequence
:
20125 state_machine
.handle_end_sequence ();
20126 end_sequence
= true;
20128 case DW_LNE_set_address
:
20131 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
20132 line_ptr
+= bytes_read
;
20134 state_machine
.check_line_address (cu
, line_ptr
,
20135 lowpc
- baseaddr
, address
);
20136 state_machine
.handle_set_address (baseaddr
, address
);
20139 case DW_LNE_define_file
:
20141 const char *cur_file
;
20142 unsigned int mod_time
, length
;
20145 cur_file
= read_direct_string (abfd
, line_ptr
,
20147 line_ptr
+= bytes_read
;
20148 dindex
= (dir_index
)
20149 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20150 line_ptr
+= bytes_read
;
20152 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20153 line_ptr
+= bytes_read
;
20155 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20156 line_ptr
+= bytes_read
;
20157 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20160 case DW_LNE_set_discriminator
:
20162 /* The discriminator is not interesting to the
20163 debugger; just ignore it. We still need to
20164 check its value though:
20165 if there are consecutive entries for the same
20166 (non-prologue) line we want to coalesce them.
20169 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20170 line_ptr
+= bytes_read
;
20172 state_machine
.handle_set_discriminator (discr
);
20176 complaint (_("mangled .debug_line section"));
20179 /* Make sure that we parsed the extended op correctly. If e.g.
20180 we expected a different address size than the producer used,
20181 we may have read the wrong number of bytes. */
20182 if (line_ptr
!= extended_end
)
20184 complaint (_("mangled .debug_line section"));
20189 state_machine
.handle_copy ();
20191 case DW_LNS_advance_pc
:
20194 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20195 line_ptr
+= bytes_read
;
20197 state_machine
.handle_advance_pc (adjust
);
20200 case DW_LNS_advance_line
:
20203 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20204 line_ptr
+= bytes_read
;
20206 state_machine
.handle_advance_line (line_delta
);
20209 case DW_LNS_set_file
:
20211 file_name_index file
20212 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20214 line_ptr
+= bytes_read
;
20216 state_machine
.handle_set_file (file
);
20219 case DW_LNS_set_column
:
20220 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20221 line_ptr
+= bytes_read
;
20223 case DW_LNS_negate_stmt
:
20224 state_machine
.handle_negate_stmt ();
20226 case DW_LNS_set_basic_block
:
20228 /* Add to the address register of the state machine the
20229 address increment value corresponding to special opcode
20230 255. I.e., this value is scaled by the minimum
20231 instruction length since special opcode 255 would have
20232 scaled the increment. */
20233 case DW_LNS_const_add_pc
:
20234 state_machine
.handle_const_add_pc ();
20236 case DW_LNS_fixed_advance_pc
:
20238 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20241 state_machine
.handle_fixed_advance_pc (addr_adj
);
20246 /* Unknown standard opcode, ignore it. */
20249 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20251 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20252 line_ptr
+= bytes_read
;
20259 dwarf2_debug_line_missing_end_sequence_complaint ();
20261 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20262 in which case we still finish recording the last line). */
20263 state_machine
.record_line (true);
20267 /* Decode the Line Number Program (LNP) for the given line_header
20268 structure and CU. The actual information extracted and the type
20269 of structures created from the LNP depends on the value of PST.
20271 1. If PST is NULL, then this procedure uses the data from the program
20272 to create all necessary symbol tables, and their linetables.
20274 2. If PST is not NULL, this procedure reads the program to determine
20275 the list of files included by the unit represented by PST, and
20276 builds all the associated partial symbol tables.
20278 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20279 It is used for relative paths in the line table.
20280 NOTE: When processing partial symtabs (pst != NULL),
20281 comp_dir == pst->dirname.
20283 NOTE: It is important that psymtabs have the same file name (via strcmp)
20284 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20285 symtab we don't use it in the name of the psymtabs we create.
20286 E.g. expand_line_sal requires this when finding psymtabs to expand.
20287 A good testcase for this is mb-inline.exp.
20289 LOWPC is the lowest address in CU (or 0 if not known).
20291 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20292 for its PC<->lines mapping information. Otherwise only the filename
20293 table is read in. */
20296 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20297 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
20298 CORE_ADDR lowpc
, int decode_mapping
)
20300 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20301 const int decode_for_pst_p
= (pst
!= NULL
);
20303 if (decode_mapping
)
20304 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20306 if (decode_for_pst_p
)
20308 /* Now that we're done scanning the Line Header Program, we can
20309 create the psymtab of each included file. */
20310 for (auto &file_entry
: lh
->file_names ())
20311 if (file_entry
.included_p
== 1)
20313 gdb::unique_xmalloc_ptr
<char> name_holder
;
20314 const char *include_name
=
20315 psymtab_include_file_name (lh
, file_entry
, pst
,
20316 comp_dir
, &name_holder
);
20317 if (include_name
!= NULL
)
20318 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20323 /* Make sure a symtab is created for every file, even files
20324 which contain only variables (i.e. no code with associated
20326 buildsym_compunit
*builder
= cu
->get_builder ();
20327 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
20329 for (auto &fe
: lh
->file_names ())
20331 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20332 if (builder
->get_current_subfile ()->symtab
== NULL
)
20334 builder
->get_current_subfile ()->symtab
20335 = allocate_symtab (cust
,
20336 builder
->get_current_subfile ()->name
);
20338 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
20343 /* Start a subfile for DWARF. FILENAME is the name of the file and
20344 DIRNAME the name of the source directory which contains FILENAME
20345 or NULL if not known.
20346 This routine tries to keep line numbers from identical absolute and
20347 relative file names in a common subfile.
20349 Using the `list' example from the GDB testsuite, which resides in
20350 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20351 of /srcdir/list0.c yields the following debugging information for list0.c:
20353 DW_AT_name: /srcdir/list0.c
20354 DW_AT_comp_dir: /compdir
20355 files.files[0].name: list0.h
20356 files.files[0].dir: /srcdir
20357 files.files[1].name: list0.c
20358 files.files[1].dir: /srcdir
20360 The line number information for list0.c has to end up in a single
20361 subfile, so that `break /srcdir/list0.c:1' works as expected.
20362 start_subfile will ensure that this happens provided that we pass the
20363 concatenation of files.files[1].dir and files.files[1].name as the
20367 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
20368 const char *dirname
)
20370 gdb::unique_xmalloc_ptr
<char> copy
;
20372 /* In order not to lose the line information directory,
20373 we concatenate it to the filename when it makes sense.
20374 Note that the Dwarf3 standard says (speaking of filenames in line
20375 information): ``The directory index is ignored for file names
20376 that represent full path names''. Thus ignoring dirname in the
20377 `else' branch below isn't an issue. */
20379 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
20381 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
20382 filename
= copy
.get ();
20385 cu
->get_builder ()->start_subfile (filename
);
20388 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
20389 buildsym_compunit constructor. */
20391 struct compunit_symtab
*
20392 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
20395 gdb_assert (m_builder
== nullptr);
20397 m_builder
.reset (new struct buildsym_compunit
20398 (per_cu
->dwarf2_per_objfile
->objfile
,
20399 name
, comp_dir
, language
, low_pc
));
20401 list_in_scope
= get_builder ()->get_file_symbols ();
20403 get_builder ()->record_debugformat ("DWARF 2");
20404 get_builder ()->record_producer (producer
);
20406 processing_has_namespace_info
= false;
20408 return get_builder ()->get_compunit_symtab ();
20412 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
20413 struct dwarf2_cu
*cu
)
20415 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20416 struct comp_unit_head
*cu_header
= &cu
->header
;
20418 /* NOTE drow/2003-01-30: There used to be a comment and some special
20419 code here to turn a symbol with DW_AT_external and a
20420 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
20421 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
20422 with some versions of binutils) where shared libraries could have
20423 relocations against symbols in their debug information - the
20424 minimal symbol would have the right address, but the debug info
20425 would not. It's no longer necessary, because we will explicitly
20426 apply relocations when we read in the debug information now. */
20428 /* A DW_AT_location attribute with no contents indicates that a
20429 variable has been optimized away. */
20430 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0)
20432 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20436 /* Handle one degenerate form of location expression specially, to
20437 preserve GDB's previous behavior when section offsets are
20438 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
20439 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
20441 if (attr
->form_is_block ()
20442 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
20443 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
20444 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
20445 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
20446 && (DW_BLOCK (attr
)->size
20447 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
20449 unsigned int dummy
;
20451 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
20452 SET_SYMBOL_VALUE_ADDRESS
20453 (sym
, cu
->header
.read_address (objfile
->obfd
,
20454 DW_BLOCK (attr
)->data
+ 1,
20457 SET_SYMBOL_VALUE_ADDRESS
20458 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
20460 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
20461 fixup_symbol_section (sym
, objfile
);
20462 SET_SYMBOL_VALUE_ADDRESS
20464 SYMBOL_VALUE_ADDRESS (sym
)
20465 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
20469 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
20470 expression evaluator, and use LOC_COMPUTED only when necessary
20471 (i.e. when the value of a register or memory location is
20472 referenced, or a thread-local block, etc.). Then again, it might
20473 not be worthwhile. I'm assuming that it isn't unless performance
20474 or memory numbers show me otherwise. */
20476 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
20478 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
20479 cu
->has_loclist
= true;
20482 /* Given a pointer to a DWARF information entry, figure out if we need
20483 to make a symbol table entry for it, and if so, create a new entry
20484 and return a pointer to it.
20485 If TYPE is NULL, determine symbol type from the die, otherwise
20486 used the passed type.
20487 If SPACE is not NULL, use it to hold the new symbol. If it is
20488 NULL, allocate a new symbol on the objfile's obstack. */
20490 static struct symbol
*
20491 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
20492 struct symbol
*space
)
20494 struct dwarf2_per_objfile
*dwarf2_per_objfile
20495 = cu
->per_cu
->dwarf2_per_objfile
;
20496 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20497 struct gdbarch
*gdbarch
= objfile
->arch ();
20498 struct symbol
*sym
= NULL
;
20500 struct attribute
*attr
= NULL
;
20501 struct attribute
*attr2
= NULL
;
20502 CORE_ADDR baseaddr
;
20503 struct pending
**list_to_add
= NULL
;
20505 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
20507 baseaddr
= objfile
->text_section_offset ();
20509 name
= dwarf2_name (die
, cu
);
20512 const char *linkagename
;
20513 int suppress_add
= 0;
20518 sym
= allocate_symbol (objfile
);
20519 OBJSTAT (objfile
, n_syms
++);
20521 /* Cache this symbol's name and the name's demangled form (if any). */
20522 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
20523 linkagename
= dwarf2_physname (name
, die
, cu
);
20524 sym
->compute_and_set_names (linkagename
, false, objfile
->per_bfd
);
20526 /* Fortran does not have mangling standard and the mangling does differ
20527 between gfortran, iFort etc. */
20528 if (cu
->language
== language_fortran
20529 && symbol_get_demangled_name (sym
) == NULL
)
20530 symbol_set_demangled_name (sym
,
20531 dwarf2_full_name (name
, die
, cu
),
20534 /* Default assumptions.
20535 Use the passed type or decode it from the die. */
20536 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20537 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20539 SYMBOL_TYPE (sym
) = type
;
20541 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
20542 attr
= dwarf2_attr (die
,
20543 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
20545 if (attr
!= nullptr)
20547 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
20550 attr
= dwarf2_attr (die
,
20551 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
20553 if (attr
!= nullptr)
20555 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
20556 struct file_entry
*fe
;
20558 if (cu
->line_header
!= NULL
)
20559 fe
= cu
->line_header
->file_name_at (file_index
);
20564 complaint (_("file index out of range"));
20566 symbol_set_symtab (sym
, fe
->symtab
);
20572 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
20573 if (attr
!= nullptr)
20577 addr
= attr
->value_as_address ();
20578 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
20579 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
20581 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
20582 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
20583 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
20584 add_symbol_to_list (sym
, cu
->list_in_scope
);
20586 case DW_TAG_subprogram
:
20587 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20589 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20590 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20591 if ((attr2
&& (DW_UNSND (attr2
) != 0))
20592 || cu
->language
== language_ada
20593 || cu
->language
== language_fortran
)
20595 /* Subprograms marked external are stored as a global symbol.
20596 Ada and Fortran subprograms, whether marked external or
20597 not, are always stored as a global symbol, because we want
20598 to be able to access them globally. For instance, we want
20599 to be able to break on a nested subprogram without having
20600 to specify the context. */
20601 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20605 list_to_add
= cu
->list_in_scope
;
20608 case DW_TAG_inlined_subroutine
:
20609 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20611 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20612 SYMBOL_INLINED (sym
) = 1;
20613 list_to_add
= cu
->list_in_scope
;
20615 case DW_TAG_template_value_param
:
20617 /* Fall through. */
20618 case DW_TAG_constant
:
20619 case DW_TAG_variable
:
20620 case DW_TAG_member
:
20621 /* Compilation with minimal debug info may result in
20622 variables with missing type entries. Change the
20623 misleading `void' type to something sensible. */
20624 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
20625 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
20627 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20628 /* In the case of DW_TAG_member, we should only be called for
20629 static const members. */
20630 if (die
->tag
== DW_TAG_member
)
20632 /* dwarf2_add_field uses die_is_declaration,
20633 so we do the same. */
20634 gdb_assert (die_is_declaration (die
, cu
));
20637 if (attr
!= nullptr)
20639 dwarf2_const_value (attr
, sym
, cu
);
20640 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20643 if (attr2
&& (DW_UNSND (attr2
) != 0))
20644 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20646 list_to_add
= cu
->list_in_scope
;
20650 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20651 if (attr
!= nullptr)
20653 var_decode_location (attr
, sym
, cu
);
20654 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20656 /* Fortran explicitly imports any global symbols to the local
20657 scope by DW_TAG_common_block. */
20658 if (cu
->language
== language_fortran
&& die
->parent
20659 && die
->parent
->tag
== DW_TAG_common_block
)
20662 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20663 && SYMBOL_VALUE_ADDRESS (sym
) == 0
20664 && !dwarf2_per_objfile
->has_section_at_zero
)
20666 /* When a static variable is eliminated by the linker,
20667 the corresponding debug information is not stripped
20668 out, but the variable address is set to null;
20669 do not add such variables into symbol table. */
20671 else if (attr2
&& (DW_UNSND (attr2
) != 0))
20673 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20674 && (objfile
->flags
& OBJF_MAINLINE
) == 0
20675 && dwarf2_per_objfile
->can_copy
)
20677 /* A global static variable might be subject to
20678 copy relocation. We first check for a local
20679 minsym, though, because maybe the symbol was
20680 marked hidden, in which case this would not
20682 bound_minimal_symbol found
20683 = (lookup_minimal_symbol_linkage
20684 (sym
->linkage_name (), objfile
));
20685 if (found
.minsym
!= nullptr)
20686 sym
->maybe_copied
= 1;
20689 /* A variable with DW_AT_external is never static,
20690 but it may be block-scoped. */
20692 = ((cu
->list_in_scope
20693 == cu
->get_builder ()->get_file_symbols ())
20694 ? cu
->get_builder ()->get_global_symbols ()
20695 : cu
->list_in_scope
);
20698 list_to_add
= cu
->list_in_scope
;
20702 /* We do not know the address of this symbol.
20703 If it is an external symbol and we have type information
20704 for it, enter the symbol as a LOC_UNRESOLVED symbol.
20705 The address of the variable will then be determined from
20706 the minimal symbol table whenever the variable is
20708 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20710 /* Fortran explicitly imports any global symbols to the local
20711 scope by DW_TAG_common_block. */
20712 if (cu
->language
== language_fortran
&& die
->parent
20713 && die
->parent
->tag
== DW_TAG_common_block
)
20715 /* SYMBOL_CLASS doesn't matter here because
20716 read_common_block is going to reset it. */
20718 list_to_add
= cu
->list_in_scope
;
20720 else if (attr2
&& (DW_UNSND (attr2
) != 0)
20721 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
20723 /* A variable with DW_AT_external is never static, but it
20724 may be block-scoped. */
20726 = ((cu
->list_in_scope
20727 == cu
->get_builder ()->get_file_symbols ())
20728 ? cu
->get_builder ()->get_global_symbols ()
20729 : cu
->list_in_scope
);
20731 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20733 else if (!die_is_declaration (die
, cu
))
20735 /* Use the default LOC_OPTIMIZED_OUT class. */
20736 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
20738 list_to_add
= cu
->list_in_scope
;
20742 case DW_TAG_formal_parameter
:
20744 /* If we are inside a function, mark this as an argument. If
20745 not, we might be looking at an argument to an inlined function
20746 when we do not have enough information to show inlined frames;
20747 pretend it's a local variable in that case so that the user can
20749 struct context_stack
*curr
20750 = cu
->get_builder ()->get_current_context_stack ();
20751 if (curr
!= nullptr && curr
->name
!= nullptr)
20752 SYMBOL_IS_ARGUMENT (sym
) = 1;
20753 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20754 if (attr
!= nullptr)
20756 var_decode_location (attr
, sym
, cu
);
20758 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20759 if (attr
!= nullptr)
20761 dwarf2_const_value (attr
, sym
, cu
);
20764 list_to_add
= cu
->list_in_scope
;
20767 case DW_TAG_unspecified_parameters
:
20768 /* From varargs functions; gdb doesn't seem to have any
20769 interest in this information, so just ignore it for now.
20772 case DW_TAG_template_type_param
:
20774 /* Fall through. */
20775 case DW_TAG_class_type
:
20776 case DW_TAG_interface_type
:
20777 case DW_TAG_structure_type
:
20778 case DW_TAG_union_type
:
20779 case DW_TAG_set_type
:
20780 case DW_TAG_enumeration_type
:
20781 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20782 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
20785 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
20786 really ever be static objects: otherwise, if you try
20787 to, say, break of a class's method and you're in a file
20788 which doesn't mention that class, it won't work unless
20789 the check for all static symbols in lookup_symbol_aux
20790 saves you. See the OtherFileClass tests in
20791 gdb.c++/namespace.exp. */
20795 buildsym_compunit
*builder
= cu
->get_builder ();
20797 = (cu
->list_in_scope
== builder
->get_file_symbols ()
20798 && cu
->language
== language_cplus
20799 ? builder
->get_global_symbols ()
20800 : cu
->list_in_scope
);
20802 /* The semantics of C++ state that "struct foo {
20803 ... }" also defines a typedef for "foo". */
20804 if (cu
->language
== language_cplus
20805 || cu
->language
== language_ada
20806 || cu
->language
== language_d
20807 || cu
->language
== language_rust
)
20809 /* The symbol's name is already allocated along
20810 with this objfile, so we don't need to
20811 duplicate it for the type. */
20812 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
20813 TYPE_NAME (SYMBOL_TYPE (sym
)) = sym
->search_name ();
20818 case DW_TAG_typedef
:
20819 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20820 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20821 list_to_add
= cu
->list_in_scope
;
20823 case DW_TAG_base_type
:
20824 case DW_TAG_subrange_type
:
20825 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20826 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20827 list_to_add
= cu
->list_in_scope
;
20829 case DW_TAG_enumerator
:
20830 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20831 if (attr
!= nullptr)
20833 dwarf2_const_value (attr
, sym
, cu
);
20836 /* NOTE: carlton/2003-11-10: See comment above in the
20837 DW_TAG_class_type, etc. block. */
20840 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
20841 && cu
->language
== language_cplus
20842 ? cu
->get_builder ()->get_global_symbols ()
20843 : cu
->list_in_scope
);
20846 case DW_TAG_imported_declaration
:
20847 case DW_TAG_namespace
:
20848 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20849 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20851 case DW_TAG_module
:
20852 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20853 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
20854 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20856 case DW_TAG_common_block
:
20857 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
20858 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
20859 add_symbol_to_list (sym
, cu
->list_in_scope
);
20862 /* Not a tag we recognize. Hopefully we aren't processing
20863 trash data, but since we must specifically ignore things
20864 we don't recognize, there is nothing else we should do at
20866 complaint (_("unsupported tag: '%s'"),
20867 dwarf_tag_name (die
->tag
));
20873 sym
->hash_next
= objfile
->template_symbols
;
20874 objfile
->template_symbols
= sym
;
20875 list_to_add
= NULL
;
20878 if (list_to_add
!= NULL
)
20879 add_symbol_to_list (sym
, list_to_add
);
20881 /* For the benefit of old versions of GCC, check for anonymous
20882 namespaces based on the demangled name. */
20883 if (!cu
->processing_has_namespace_info
20884 && cu
->language
== language_cplus
)
20885 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
20890 /* Given an attr with a DW_FORM_dataN value in host byte order,
20891 zero-extend it as appropriate for the symbol's type. The DWARF
20892 standard (v4) is not entirely clear about the meaning of using
20893 DW_FORM_dataN for a constant with a signed type, where the type is
20894 wider than the data. The conclusion of a discussion on the DWARF
20895 list was that this is unspecified. We choose to always zero-extend
20896 because that is the interpretation long in use by GCC. */
20899 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
20900 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
20902 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20903 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
20904 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
20905 LONGEST l
= DW_UNSND (attr
);
20907 if (bits
< sizeof (*value
) * 8)
20909 l
&= ((LONGEST
) 1 << bits
) - 1;
20912 else if (bits
== sizeof (*value
) * 8)
20916 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
20917 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
20924 /* Read a constant value from an attribute. Either set *VALUE, or if
20925 the value does not fit in *VALUE, set *BYTES - either already
20926 allocated on the objfile obstack, or newly allocated on OBSTACK,
20927 or, set *BATON, if we translated the constant to a location
20931 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
20932 const char *name
, struct obstack
*obstack
,
20933 struct dwarf2_cu
*cu
,
20934 LONGEST
*value
, const gdb_byte
**bytes
,
20935 struct dwarf2_locexpr_baton
**baton
)
20937 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20938 struct comp_unit_head
*cu_header
= &cu
->header
;
20939 struct dwarf_block
*blk
;
20940 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
20941 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20947 switch (attr
->form
)
20950 case DW_FORM_addrx
:
20951 case DW_FORM_GNU_addr_index
:
20955 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
20956 dwarf2_const_value_length_mismatch_complaint (name
,
20957 cu_header
->addr_size
,
20958 TYPE_LENGTH (type
));
20959 /* Symbols of this form are reasonably rare, so we just
20960 piggyback on the existing location code rather than writing
20961 a new implementation of symbol_computed_ops. */
20962 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
20963 (*baton
)->per_cu
= cu
->per_cu
;
20964 gdb_assert ((*baton
)->per_cu
);
20966 (*baton
)->size
= 2 + cu_header
->addr_size
;
20967 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
20968 (*baton
)->data
= data
;
20970 data
[0] = DW_OP_addr
;
20971 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
20972 byte_order
, DW_ADDR (attr
));
20973 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
20976 case DW_FORM_string
:
20979 case DW_FORM_GNU_str_index
:
20980 case DW_FORM_GNU_strp_alt
:
20981 /* DW_STRING is already allocated on the objfile obstack, point
20983 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
20985 case DW_FORM_block1
:
20986 case DW_FORM_block2
:
20987 case DW_FORM_block4
:
20988 case DW_FORM_block
:
20989 case DW_FORM_exprloc
:
20990 case DW_FORM_data16
:
20991 blk
= DW_BLOCK (attr
);
20992 if (TYPE_LENGTH (type
) != blk
->size
)
20993 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
20994 TYPE_LENGTH (type
));
20995 *bytes
= blk
->data
;
20998 /* The DW_AT_const_value attributes are supposed to carry the
20999 symbol's value "represented as it would be on the target
21000 architecture." By the time we get here, it's already been
21001 converted to host endianness, so we just need to sign- or
21002 zero-extend it as appropriate. */
21003 case DW_FORM_data1
:
21004 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21006 case DW_FORM_data2
:
21007 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21009 case DW_FORM_data4
:
21010 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21012 case DW_FORM_data8
:
21013 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21016 case DW_FORM_sdata
:
21017 case DW_FORM_implicit_const
:
21018 *value
= DW_SND (attr
);
21021 case DW_FORM_udata
:
21022 *value
= DW_UNSND (attr
);
21026 complaint (_("unsupported const value attribute form: '%s'"),
21027 dwarf_form_name (attr
->form
));
21034 /* Copy constant value from an attribute to a symbol. */
21037 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21038 struct dwarf2_cu
*cu
)
21040 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21042 const gdb_byte
*bytes
;
21043 struct dwarf2_locexpr_baton
*baton
;
21045 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21046 sym
->print_name (),
21047 &objfile
->objfile_obstack
, cu
,
21048 &value
, &bytes
, &baton
);
21052 SYMBOL_LOCATION_BATON (sym
) = baton
;
21053 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21055 else if (bytes
!= NULL
)
21057 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21058 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21062 SYMBOL_VALUE (sym
) = value
;
21063 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21067 /* Return the type of the die in question using its DW_AT_type attribute. */
21069 static struct type
*
21070 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21072 struct attribute
*type_attr
;
21074 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21077 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21078 /* A missing DW_AT_type represents a void type. */
21079 return objfile_type (objfile
)->builtin_void
;
21082 return lookup_die_type (die
, type_attr
, cu
);
21085 /* True iff CU's producer generates GNAT Ada auxiliary information
21086 that allows to find parallel types through that information instead
21087 of having to do expensive parallel lookups by type name. */
21090 need_gnat_info (struct dwarf2_cu
*cu
)
21092 /* Assume that the Ada compiler was GNAT, which always produces
21093 the auxiliary information. */
21094 return (cu
->language
== language_ada
);
21097 /* Return the auxiliary type of the die in question using its
21098 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21099 attribute is not present. */
21101 static struct type
*
21102 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21104 struct attribute
*type_attr
;
21106 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21110 return lookup_die_type (die
, type_attr
, cu
);
21113 /* If DIE has a descriptive_type attribute, then set the TYPE's
21114 descriptive type accordingly. */
21117 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21118 struct dwarf2_cu
*cu
)
21120 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21122 if (descriptive_type
)
21124 ALLOCATE_GNAT_AUX_TYPE (type
);
21125 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21129 /* Return the containing type of the die in question using its
21130 DW_AT_containing_type attribute. */
21132 static struct type
*
21133 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21135 struct attribute
*type_attr
;
21136 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21138 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21140 error (_("Dwarf Error: Problem turning containing type into gdb type "
21141 "[in module %s]"), objfile_name (objfile
));
21143 return lookup_die_type (die
, type_attr
, cu
);
21146 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21148 static struct type
*
21149 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21151 struct dwarf2_per_objfile
*dwarf2_per_objfile
21152 = cu
->per_cu
->dwarf2_per_objfile
;
21153 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21156 std::string message
21157 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
21158 objfile_name (objfile
),
21159 sect_offset_str (cu
->header
.sect_off
),
21160 sect_offset_str (die
->sect_off
));
21161 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
21163 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21166 /* Look up the type of DIE in CU using its type attribute ATTR.
21167 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21168 DW_AT_containing_type.
21169 If there is no type substitute an error marker. */
21171 static struct type
*
21172 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21173 struct dwarf2_cu
*cu
)
21175 struct dwarf2_per_objfile
*dwarf2_per_objfile
21176 = cu
->per_cu
->dwarf2_per_objfile
;
21177 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21178 struct type
*this_type
;
21180 gdb_assert (attr
->name
== DW_AT_type
21181 || attr
->name
== DW_AT_GNAT_descriptive_type
21182 || attr
->name
== DW_AT_containing_type
);
21184 /* First see if we have it cached. */
21186 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21188 struct dwarf2_per_cu_data
*per_cu
;
21189 sect_offset sect_off
= attr
->get_ref_die_offset ();
21191 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21192 dwarf2_per_objfile
);
21193 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21195 else if (attr
->form_is_ref ())
21197 sect_offset sect_off
= attr
->get_ref_die_offset ();
21199 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21201 else if (attr
->form
== DW_FORM_ref_sig8
)
21203 ULONGEST signature
= DW_SIGNATURE (attr
);
21205 return get_signatured_type (die
, signature
, cu
);
21209 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21210 " at %s [in module %s]"),
21211 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21212 objfile_name (objfile
));
21213 return build_error_marker_type (cu
, die
);
21216 /* If not cached we need to read it in. */
21218 if (this_type
== NULL
)
21220 struct die_info
*type_die
= NULL
;
21221 struct dwarf2_cu
*type_cu
= cu
;
21223 if (attr
->form_is_ref ())
21224 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21225 if (type_die
== NULL
)
21226 return build_error_marker_type (cu
, die
);
21227 /* If we find the type now, it's probably because the type came
21228 from an inter-CU reference and the type's CU got expanded before
21230 this_type
= read_type_die (type_die
, type_cu
);
21233 /* If we still don't have a type use an error marker. */
21235 if (this_type
== NULL
)
21236 return build_error_marker_type (cu
, die
);
21241 /* Return the type in DIE, CU.
21242 Returns NULL for invalid types.
21244 This first does a lookup in die_type_hash,
21245 and only reads the die in if necessary.
21247 NOTE: This can be called when reading in partial or full symbols. */
21249 static struct type
*
21250 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21252 struct type
*this_type
;
21254 this_type
= get_die_type (die
, cu
);
21258 return read_type_die_1 (die
, cu
);
21261 /* Read the type in DIE, CU.
21262 Returns NULL for invalid types. */
21264 static struct type
*
21265 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21267 struct type
*this_type
= NULL
;
21271 case DW_TAG_class_type
:
21272 case DW_TAG_interface_type
:
21273 case DW_TAG_structure_type
:
21274 case DW_TAG_union_type
:
21275 this_type
= read_structure_type (die
, cu
);
21277 case DW_TAG_enumeration_type
:
21278 this_type
= read_enumeration_type (die
, cu
);
21280 case DW_TAG_subprogram
:
21281 case DW_TAG_subroutine_type
:
21282 case DW_TAG_inlined_subroutine
:
21283 this_type
= read_subroutine_type (die
, cu
);
21285 case DW_TAG_array_type
:
21286 this_type
= read_array_type (die
, cu
);
21288 case DW_TAG_set_type
:
21289 this_type
= read_set_type (die
, cu
);
21291 case DW_TAG_pointer_type
:
21292 this_type
= read_tag_pointer_type (die
, cu
);
21294 case DW_TAG_ptr_to_member_type
:
21295 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21297 case DW_TAG_reference_type
:
21298 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21300 case DW_TAG_rvalue_reference_type
:
21301 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21303 case DW_TAG_const_type
:
21304 this_type
= read_tag_const_type (die
, cu
);
21306 case DW_TAG_volatile_type
:
21307 this_type
= read_tag_volatile_type (die
, cu
);
21309 case DW_TAG_restrict_type
:
21310 this_type
= read_tag_restrict_type (die
, cu
);
21312 case DW_TAG_string_type
:
21313 this_type
= read_tag_string_type (die
, cu
);
21315 case DW_TAG_typedef
:
21316 this_type
= read_typedef (die
, cu
);
21318 case DW_TAG_subrange_type
:
21319 this_type
= read_subrange_type (die
, cu
);
21321 case DW_TAG_base_type
:
21322 this_type
= read_base_type (die
, cu
);
21324 case DW_TAG_unspecified_type
:
21325 this_type
= read_unspecified_type (die
, cu
);
21327 case DW_TAG_namespace
:
21328 this_type
= read_namespace_type (die
, cu
);
21330 case DW_TAG_module
:
21331 this_type
= read_module_type (die
, cu
);
21333 case DW_TAG_atomic_type
:
21334 this_type
= read_tag_atomic_type (die
, cu
);
21337 complaint (_("unexpected tag in read_type_die: '%s'"),
21338 dwarf_tag_name (die
->tag
));
21345 /* See if we can figure out if the class lives in a namespace. We do
21346 this by looking for a member function; its demangled name will
21347 contain namespace info, if there is any.
21348 Return the computed name or NULL.
21349 Space for the result is allocated on the objfile's obstack.
21350 This is the full-die version of guess_partial_die_structure_name.
21351 In this case we know DIE has no useful parent. */
21353 static const char *
21354 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21356 struct die_info
*spec_die
;
21357 struct dwarf2_cu
*spec_cu
;
21358 struct die_info
*child
;
21359 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21362 spec_die
= die_specification (die
, &spec_cu
);
21363 if (spec_die
!= NULL
)
21369 for (child
= die
->child
;
21371 child
= child
->sibling
)
21373 if (child
->tag
== DW_TAG_subprogram
)
21375 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21377 if (linkage_name
!= NULL
)
21379 gdb::unique_xmalloc_ptr
<char> actual_name
21380 (language_class_name_from_physname (cu
->language_defn
,
21382 const char *name
= NULL
;
21384 if (actual_name
!= NULL
)
21386 const char *die_name
= dwarf2_name (die
, cu
);
21388 if (die_name
!= NULL
21389 && strcmp (die_name
, actual_name
.get ()) != 0)
21391 /* Strip off the class name from the full name.
21392 We want the prefix. */
21393 int die_name_len
= strlen (die_name
);
21394 int actual_name_len
= strlen (actual_name
.get ());
21395 const char *ptr
= actual_name
.get ();
21397 /* Test for '::' as a sanity check. */
21398 if (actual_name_len
> die_name_len
+ 2
21399 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
21400 name
= obstack_strndup (
21401 &objfile
->per_bfd
->storage_obstack
,
21402 ptr
, actual_name_len
- die_name_len
- 2);
21413 /* GCC might emit a nameless typedef that has a linkage name. Determine the
21414 prefix part in such case. See
21415 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21417 static const char *
21418 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21420 struct attribute
*attr
;
21423 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
21424 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
21427 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
21430 attr
= dw2_linkage_name_attr (die
, cu
);
21431 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21434 /* dwarf2_name had to be already called. */
21435 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
21437 /* Strip the base name, keep any leading namespaces/classes. */
21438 base
= strrchr (DW_STRING (attr
), ':');
21439 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
21442 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21443 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
21445 &base
[-1] - DW_STRING (attr
));
21448 /* Return the name of the namespace/class that DIE is defined within,
21449 or "" if we can't tell. The caller should not xfree the result.
21451 For example, if we're within the method foo() in the following
21461 then determine_prefix on foo's die will return "N::C". */
21463 static const char *
21464 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21466 struct dwarf2_per_objfile
*dwarf2_per_objfile
21467 = cu
->per_cu
->dwarf2_per_objfile
;
21468 struct die_info
*parent
, *spec_die
;
21469 struct dwarf2_cu
*spec_cu
;
21470 struct type
*parent_type
;
21471 const char *retval
;
21473 if (cu
->language
!= language_cplus
21474 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
21475 && cu
->language
!= language_rust
)
21478 retval
= anonymous_struct_prefix (die
, cu
);
21482 /* We have to be careful in the presence of DW_AT_specification.
21483 For example, with GCC 3.4, given the code
21487 // Definition of N::foo.
21491 then we'll have a tree of DIEs like this:
21493 1: DW_TAG_compile_unit
21494 2: DW_TAG_namespace // N
21495 3: DW_TAG_subprogram // declaration of N::foo
21496 4: DW_TAG_subprogram // definition of N::foo
21497 DW_AT_specification // refers to die #3
21499 Thus, when processing die #4, we have to pretend that we're in
21500 the context of its DW_AT_specification, namely the contex of die
21503 spec_die
= die_specification (die
, &spec_cu
);
21504 if (spec_die
== NULL
)
21505 parent
= die
->parent
;
21508 parent
= spec_die
->parent
;
21512 if (parent
== NULL
)
21514 else if (parent
->building_fullname
)
21517 const char *parent_name
;
21519 /* It has been seen on RealView 2.2 built binaries,
21520 DW_TAG_template_type_param types actually _defined_ as
21521 children of the parent class:
21524 template class <class Enum> Class{};
21525 Class<enum E> class_e;
21527 1: DW_TAG_class_type (Class)
21528 2: DW_TAG_enumeration_type (E)
21529 3: DW_TAG_enumerator (enum1:0)
21530 3: DW_TAG_enumerator (enum2:1)
21532 2: DW_TAG_template_type_param
21533 DW_AT_type DW_FORM_ref_udata (E)
21535 Besides being broken debug info, it can put GDB into an
21536 infinite loop. Consider:
21538 When we're building the full name for Class<E>, we'll start
21539 at Class, and go look over its template type parameters,
21540 finding E. We'll then try to build the full name of E, and
21541 reach here. We're now trying to build the full name of E,
21542 and look over the parent DIE for containing scope. In the
21543 broken case, if we followed the parent DIE of E, we'd again
21544 find Class, and once again go look at its template type
21545 arguments, etc., etc. Simply don't consider such parent die
21546 as source-level parent of this die (it can't be, the language
21547 doesn't allow it), and break the loop here. */
21548 name
= dwarf2_name (die
, cu
);
21549 parent_name
= dwarf2_name (parent
, cu
);
21550 complaint (_("template param type '%s' defined within parent '%s'"),
21551 name
? name
: "<unknown>",
21552 parent_name
? parent_name
: "<unknown>");
21556 switch (parent
->tag
)
21558 case DW_TAG_namespace
:
21559 parent_type
= read_type_die (parent
, cu
);
21560 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
21561 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
21562 Work around this problem here. */
21563 if (cu
->language
== language_cplus
21564 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
21566 /* We give a name to even anonymous namespaces. */
21567 return TYPE_NAME (parent_type
);
21568 case DW_TAG_class_type
:
21569 case DW_TAG_interface_type
:
21570 case DW_TAG_structure_type
:
21571 case DW_TAG_union_type
:
21572 case DW_TAG_module
:
21573 parent_type
= read_type_die (parent
, cu
);
21574 if (TYPE_NAME (parent_type
) != NULL
)
21575 return TYPE_NAME (parent_type
);
21577 /* An anonymous structure is only allowed non-static data
21578 members; no typedefs, no member functions, et cetera.
21579 So it does not need a prefix. */
21581 case DW_TAG_compile_unit
:
21582 case DW_TAG_partial_unit
:
21583 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
21584 if (cu
->language
== language_cplus
21585 && !dwarf2_per_objfile
->types
.empty ()
21586 && die
->child
!= NULL
21587 && (die
->tag
== DW_TAG_class_type
21588 || die
->tag
== DW_TAG_structure_type
21589 || die
->tag
== DW_TAG_union_type
))
21591 const char *name
= guess_full_die_structure_name (die
, cu
);
21596 case DW_TAG_subprogram
:
21597 /* Nested subroutines in Fortran get a prefix with the name
21598 of the parent's subroutine. */
21599 if (cu
->language
== language_fortran
)
21601 if ((die
->tag
== DW_TAG_subprogram
)
21602 && (dwarf2_name (parent
, cu
) != NULL
))
21603 return dwarf2_name (parent
, cu
);
21605 return determine_prefix (parent
, cu
);
21606 case DW_TAG_enumeration_type
:
21607 parent_type
= read_type_die (parent
, cu
);
21608 if (TYPE_DECLARED_CLASS (parent_type
))
21610 if (TYPE_NAME (parent_type
) != NULL
)
21611 return TYPE_NAME (parent_type
);
21614 /* Fall through. */
21616 return determine_prefix (parent
, cu
);
21620 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
21621 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
21622 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
21623 an obconcat, otherwise allocate storage for the result. The CU argument is
21624 used to determine the language and hence, the appropriate separator. */
21626 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
21629 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
21630 int physname
, struct dwarf2_cu
*cu
)
21632 const char *lead
= "";
21635 if (suffix
== NULL
|| suffix
[0] == '\0'
21636 || prefix
== NULL
|| prefix
[0] == '\0')
21638 else if (cu
->language
== language_d
)
21640 /* For D, the 'main' function could be defined in any module, but it
21641 should never be prefixed. */
21642 if (strcmp (suffix
, "D main") == 0)
21650 else if (cu
->language
== language_fortran
&& physname
)
21652 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
21653 DW_AT_MIPS_linkage_name is preferred and used instead. */
21661 if (prefix
== NULL
)
21663 if (suffix
== NULL
)
21670 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
21672 strcpy (retval
, lead
);
21673 strcat (retval
, prefix
);
21674 strcat (retval
, sep
);
21675 strcat (retval
, suffix
);
21680 /* We have an obstack. */
21681 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
21685 /* Get name of a die, return NULL if not found. */
21687 static const char *
21688 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
21689 struct objfile
*objfile
)
21691 if (name
&& cu
->language
== language_cplus
)
21693 std::string canon_name
= cp_canonicalize_string (name
);
21695 if (!canon_name
.empty ())
21697 if (canon_name
!= name
)
21698 name
= objfile
->intern (canon_name
);
21705 /* Get name of a die, return NULL if not found.
21706 Anonymous namespaces are converted to their magic string. */
21708 static const char *
21709 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21711 struct attribute
*attr
;
21712 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21714 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
21715 if ((!attr
|| !DW_STRING (attr
))
21716 && die
->tag
!= DW_TAG_namespace
21717 && die
->tag
!= DW_TAG_class_type
21718 && die
->tag
!= DW_TAG_interface_type
21719 && die
->tag
!= DW_TAG_structure_type
21720 && die
->tag
!= DW_TAG_union_type
)
21725 case DW_TAG_compile_unit
:
21726 case DW_TAG_partial_unit
:
21727 /* Compilation units have a DW_AT_name that is a filename, not
21728 a source language identifier. */
21729 case DW_TAG_enumeration_type
:
21730 case DW_TAG_enumerator
:
21731 /* These tags always have simple identifiers already; no need
21732 to canonicalize them. */
21733 return DW_STRING (attr
);
21735 case DW_TAG_namespace
:
21736 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
21737 return DW_STRING (attr
);
21738 return CP_ANONYMOUS_NAMESPACE_STR
;
21740 case DW_TAG_class_type
:
21741 case DW_TAG_interface_type
:
21742 case DW_TAG_structure_type
:
21743 case DW_TAG_union_type
:
21744 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
21745 structures or unions. These were of the form "._%d" in GCC 4.1,
21746 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
21747 and GCC 4.4. We work around this problem by ignoring these. */
21748 if (attr
&& DW_STRING (attr
)
21749 && (startswith (DW_STRING (attr
), "._")
21750 || startswith (DW_STRING (attr
), "<anonymous")))
21753 /* GCC might emit a nameless typedef that has a linkage name. See
21754 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21755 if (!attr
|| DW_STRING (attr
) == NULL
)
21757 attr
= dw2_linkage_name_attr (die
, cu
);
21758 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21761 /* Avoid demangling DW_STRING (attr) the second time on a second
21762 call for the same DIE. */
21763 if (!DW_STRING_IS_CANONICAL (attr
))
21765 gdb::unique_xmalloc_ptr
<char> demangled
21766 (gdb_demangle (DW_STRING (attr
), DMGL_TYPES
));
21767 if (demangled
== nullptr)
21770 DW_STRING (attr
) = objfile
->intern (demangled
.get ());
21771 DW_STRING_IS_CANONICAL (attr
) = 1;
21774 /* Strip any leading namespaces/classes, keep only the base name.
21775 DW_AT_name for named DIEs does not contain the prefixes. */
21776 const char *base
= strrchr (DW_STRING (attr
), ':');
21777 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
21780 return DW_STRING (attr
);
21788 if (!DW_STRING_IS_CANONICAL (attr
))
21790 DW_STRING (attr
) = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
21792 DW_STRING_IS_CANONICAL (attr
) = 1;
21794 return DW_STRING (attr
);
21797 /* Return the die that this die in an extension of, or NULL if there
21798 is none. *EXT_CU is the CU containing DIE on input, and the CU
21799 containing the return value on output. */
21801 static struct die_info
*
21802 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
21804 struct attribute
*attr
;
21806 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
21810 return follow_die_ref (die
, attr
, ext_cu
);
21814 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
21818 print_spaces (indent
, f
);
21819 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
21820 dwarf_tag_name (die
->tag
), die
->abbrev
,
21821 sect_offset_str (die
->sect_off
));
21823 if (die
->parent
!= NULL
)
21825 print_spaces (indent
, f
);
21826 fprintf_unfiltered (f
, " parent at offset: %s\n",
21827 sect_offset_str (die
->parent
->sect_off
));
21830 print_spaces (indent
, f
);
21831 fprintf_unfiltered (f
, " has children: %s\n",
21832 dwarf_bool_name (die
->child
!= NULL
));
21834 print_spaces (indent
, f
);
21835 fprintf_unfiltered (f
, " attributes:\n");
21837 for (i
= 0; i
< die
->num_attrs
; ++i
)
21839 print_spaces (indent
, f
);
21840 fprintf_unfiltered (f
, " %s (%s) ",
21841 dwarf_attr_name (die
->attrs
[i
].name
),
21842 dwarf_form_name (die
->attrs
[i
].form
));
21844 switch (die
->attrs
[i
].form
)
21847 case DW_FORM_addrx
:
21848 case DW_FORM_GNU_addr_index
:
21849 fprintf_unfiltered (f
, "address: ");
21850 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
21852 case DW_FORM_block2
:
21853 case DW_FORM_block4
:
21854 case DW_FORM_block
:
21855 case DW_FORM_block1
:
21856 fprintf_unfiltered (f
, "block: size %s",
21857 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21859 case DW_FORM_exprloc
:
21860 fprintf_unfiltered (f
, "expression: size %s",
21861 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21863 case DW_FORM_data16
:
21864 fprintf_unfiltered (f
, "constant of 16 bytes");
21866 case DW_FORM_ref_addr
:
21867 fprintf_unfiltered (f
, "ref address: ");
21868 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21870 case DW_FORM_GNU_ref_alt
:
21871 fprintf_unfiltered (f
, "alt ref address: ");
21872 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21878 case DW_FORM_ref_udata
:
21879 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
21880 (long) (DW_UNSND (&die
->attrs
[i
])));
21882 case DW_FORM_data1
:
21883 case DW_FORM_data2
:
21884 case DW_FORM_data4
:
21885 case DW_FORM_data8
:
21886 case DW_FORM_udata
:
21887 case DW_FORM_sdata
:
21888 fprintf_unfiltered (f
, "constant: %s",
21889 pulongest (DW_UNSND (&die
->attrs
[i
])));
21891 case DW_FORM_sec_offset
:
21892 fprintf_unfiltered (f
, "section offset: %s",
21893 pulongest (DW_UNSND (&die
->attrs
[i
])));
21895 case DW_FORM_ref_sig8
:
21896 fprintf_unfiltered (f
, "signature: %s",
21897 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
21899 case DW_FORM_string
:
21901 case DW_FORM_line_strp
:
21903 case DW_FORM_GNU_str_index
:
21904 case DW_FORM_GNU_strp_alt
:
21905 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
21906 DW_STRING (&die
->attrs
[i
])
21907 ? DW_STRING (&die
->attrs
[i
]) : "",
21908 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
21911 if (DW_UNSND (&die
->attrs
[i
]))
21912 fprintf_unfiltered (f
, "flag: TRUE");
21914 fprintf_unfiltered (f
, "flag: FALSE");
21916 case DW_FORM_flag_present
:
21917 fprintf_unfiltered (f
, "flag: TRUE");
21919 case DW_FORM_indirect
:
21920 /* The reader will have reduced the indirect form to
21921 the "base form" so this form should not occur. */
21922 fprintf_unfiltered (f
,
21923 "unexpected attribute form: DW_FORM_indirect");
21925 case DW_FORM_implicit_const
:
21926 fprintf_unfiltered (f
, "constant: %s",
21927 plongest (DW_SND (&die
->attrs
[i
])));
21930 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
21931 die
->attrs
[i
].form
);
21934 fprintf_unfiltered (f
, "\n");
21939 dump_die_for_error (struct die_info
*die
)
21941 dump_die_shallow (gdb_stderr
, 0, die
);
21945 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
21947 int indent
= level
* 4;
21949 gdb_assert (die
!= NULL
);
21951 if (level
>= max_level
)
21954 dump_die_shallow (f
, indent
, die
);
21956 if (die
->child
!= NULL
)
21958 print_spaces (indent
, f
);
21959 fprintf_unfiltered (f
, " Children:");
21960 if (level
+ 1 < max_level
)
21962 fprintf_unfiltered (f
, "\n");
21963 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
21967 fprintf_unfiltered (f
,
21968 " [not printed, max nesting level reached]\n");
21972 if (die
->sibling
!= NULL
&& level
> 0)
21974 dump_die_1 (f
, level
, max_level
, die
->sibling
);
21978 /* This is called from the pdie macro in gdbinit.in.
21979 It's not static so gcc will keep a copy callable from gdb. */
21982 dump_die (struct die_info
*die
, int max_level
)
21984 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
21988 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
21992 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
21993 to_underlying (die
->sect_off
),
21999 /* Follow reference or signature attribute ATTR of SRC_DIE.
22000 On entry *REF_CU is the CU of SRC_DIE.
22001 On exit *REF_CU is the CU of the result. */
22003 static struct die_info
*
22004 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22005 struct dwarf2_cu
**ref_cu
)
22007 struct die_info
*die
;
22009 if (attr
->form_is_ref ())
22010 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22011 else if (attr
->form
== DW_FORM_ref_sig8
)
22012 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22015 dump_die_for_error (src_die
);
22016 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22017 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22023 /* Follow reference OFFSET.
22024 On entry *REF_CU is the CU of the source die referencing OFFSET.
22025 On exit *REF_CU is the CU of the result.
22026 Returns NULL if OFFSET is invalid. */
22028 static struct die_info
*
22029 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22030 struct dwarf2_cu
**ref_cu
)
22032 struct die_info temp_die
;
22033 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22034 struct dwarf2_per_objfile
*dwarf2_per_objfile
22035 = cu
->per_cu
->dwarf2_per_objfile
;
22037 gdb_assert (cu
->per_cu
!= NULL
);
22041 if (cu
->per_cu
->is_debug_types
)
22043 /* .debug_types CUs cannot reference anything outside their CU.
22044 If they need to, they have to reference a signatured type via
22045 DW_FORM_ref_sig8. */
22046 if (!cu
->header
.offset_in_cu_p (sect_off
))
22049 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22050 || !cu
->header
.offset_in_cu_p (sect_off
))
22052 struct dwarf2_per_cu_data
*per_cu
;
22054 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22055 dwarf2_per_objfile
);
22057 /* If necessary, add it to the queue and load its DIEs. */
22058 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22059 load_full_comp_unit (per_cu
, false, cu
->language
);
22061 target_cu
= per_cu
->cu
;
22063 else if (cu
->dies
== NULL
)
22065 /* We're loading full DIEs during partial symbol reading. */
22066 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22067 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
22070 *ref_cu
= target_cu
;
22071 temp_die
.sect_off
= sect_off
;
22073 if (target_cu
!= cu
)
22074 target_cu
->ancestor
= cu
;
22076 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22078 to_underlying (sect_off
));
22081 /* Follow reference attribute ATTR of SRC_DIE.
22082 On entry *REF_CU is the CU of SRC_DIE.
22083 On exit *REF_CU is the CU of the result. */
22085 static struct die_info
*
22086 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22087 struct dwarf2_cu
**ref_cu
)
22089 sect_offset sect_off
= attr
->get_ref_die_offset ();
22090 struct dwarf2_cu
*cu
= *ref_cu
;
22091 struct die_info
*die
;
22093 die
= follow_die_offset (sect_off
,
22094 (attr
->form
== DW_FORM_GNU_ref_alt
22095 || cu
->per_cu
->is_dwz
),
22098 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22099 "at %s [in module %s]"),
22100 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22101 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22108 struct dwarf2_locexpr_baton
22109 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22110 dwarf2_per_cu_data
*per_cu
,
22111 CORE_ADDR (*get_frame_pc
) (void *baton
),
22112 void *baton
, bool resolve_abstract_p
)
22114 struct dwarf2_cu
*cu
;
22115 struct die_info
*die
;
22116 struct attribute
*attr
;
22117 struct dwarf2_locexpr_baton retval
;
22118 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22119 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22121 if (per_cu
->cu
== NULL
)
22122 load_cu (per_cu
, false);
22126 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22127 Instead just throw an error, not much else we can do. */
22128 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22129 sect_offset_str (sect_off
), objfile_name (objfile
));
22132 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22134 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22135 sect_offset_str (sect_off
), objfile_name (objfile
));
22137 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22138 if (!attr
&& resolve_abstract_p
22139 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
22140 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
22142 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22143 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
22144 struct gdbarch
*gdbarch
= objfile
->arch ();
22146 for (const auto &cand_off
22147 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
22149 struct dwarf2_cu
*cand_cu
= cu
;
22150 struct die_info
*cand
22151 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
22154 || cand
->parent
->tag
!= DW_TAG_subprogram
)
22157 CORE_ADDR pc_low
, pc_high
;
22158 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
22159 if (pc_low
== ((CORE_ADDR
) -1))
22161 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
22162 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
22163 if (!(pc_low
<= pc
&& pc
< pc_high
))
22167 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22174 /* DWARF: "If there is no such attribute, then there is no effect.".
22175 DATA is ignored if SIZE is 0. */
22177 retval
.data
= NULL
;
22180 else if (attr
->form_is_section_offset ())
22182 struct dwarf2_loclist_baton loclist_baton
;
22183 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22186 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22188 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22190 retval
.size
= size
;
22194 if (!attr
->form_is_block ())
22195 error (_("Dwarf Error: DIE at %s referenced in module %s "
22196 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22197 sect_offset_str (sect_off
), objfile_name (objfile
));
22199 retval
.data
= DW_BLOCK (attr
)->data
;
22200 retval
.size
= DW_BLOCK (attr
)->size
;
22202 retval
.per_cu
= cu
->per_cu
;
22204 age_cached_comp_units (dwarf2_per_objfile
);
22211 struct dwarf2_locexpr_baton
22212 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22213 dwarf2_per_cu_data
*per_cu
,
22214 CORE_ADDR (*get_frame_pc
) (void *baton
),
22217 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22219 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22222 /* Write a constant of a given type as target-ordered bytes into
22225 static const gdb_byte
*
22226 write_constant_as_bytes (struct obstack
*obstack
,
22227 enum bfd_endian byte_order
,
22234 *len
= TYPE_LENGTH (type
);
22235 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22236 store_unsigned_integer (result
, *len
, byte_order
, value
);
22244 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22245 dwarf2_per_cu_data
*per_cu
,
22249 struct dwarf2_cu
*cu
;
22250 struct die_info
*die
;
22251 struct attribute
*attr
;
22252 const gdb_byte
*result
= NULL
;
22255 enum bfd_endian byte_order
;
22256 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22258 if (per_cu
->cu
== NULL
)
22259 load_cu (per_cu
, false);
22263 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22264 Instead just throw an error, not much else we can do. */
22265 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22266 sect_offset_str (sect_off
), objfile_name (objfile
));
22269 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22271 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22272 sect_offset_str (sect_off
), objfile_name (objfile
));
22274 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22278 byte_order
= (bfd_big_endian (objfile
->obfd
)
22279 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22281 switch (attr
->form
)
22284 case DW_FORM_addrx
:
22285 case DW_FORM_GNU_addr_index
:
22289 *len
= cu
->header
.addr_size
;
22290 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22291 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22295 case DW_FORM_string
:
22298 case DW_FORM_GNU_str_index
:
22299 case DW_FORM_GNU_strp_alt
:
22300 /* DW_STRING is already allocated on the objfile obstack, point
22302 result
= (const gdb_byte
*) DW_STRING (attr
);
22303 *len
= strlen (DW_STRING (attr
));
22305 case DW_FORM_block1
:
22306 case DW_FORM_block2
:
22307 case DW_FORM_block4
:
22308 case DW_FORM_block
:
22309 case DW_FORM_exprloc
:
22310 case DW_FORM_data16
:
22311 result
= DW_BLOCK (attr
)->data
;
22312 *len
= DW_BLOCK (attr
)->size
;
22315 /* The DW_AT_const_value attributes are supposed to carry the
22316 symbol's value "represented as it would be on the target
22317 architecture." By the time we get here, it's already been
22318 converted to host endianness, so we just need to sign- or
22319 zero-extend it as appropriate. */
22320 case DW_FORM_data1
:
22321 type
= die_type (die
, cu
);
22322 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
22323 if (result
== NULL
)
22324 result
= write_constant_as_bytes (obstack
, byte_order
,
22327 case DW_FORM_data2
:
22328 type
= die_type (die
, cu
);
22329 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
22330 if (result
== NULL
)
22331 result
= write_constant_as_bytes (obstack
, byte_order
,
22334 case DW_FORM_data4
:
22335 type
= die_type (die
, cu
);
22336 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
22337 if (result
== NULL
)
22338 result
= write_constant_as_bytes (obstack
, byte_order
,
22341 case DW_FORM_data8
:
22342 type
= die_type (die
, cu
);
22343 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
22344 if (result
== NULL
)
22345 result
= write_constant_as_bytes (obstack
, byte_order
,
22349 case DW_FORM_sdata
:
22350 case DW_FORM_implicit_const
:
22351 type
= die_type (die
, cu
);
22352 result
= write_constant_as_bytes (obstack
, byte_order
,
22353 type
, DW_SND (attr
), len
);
22356 case DW_FORM_udata
:
22357 type
= die_type (die
, cu
);
22358 result
= write_constant_as_bytes (obstack
, byte_order
,
22359 type
, DW_UNSND (attr
), len
);
22363 complaint (_("unsupported const value attribute form: '%s'"),
22364 dwarf_form_name (attr
->form
));
22374 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
22375 dwarf2_per_cu_data
*per_cu
)
22377 struct dwarf2_cu
*cu
;
22378 struct die_info
*die
;
22380 if (per_cu
->cu
== NULL
)
22381 load_cu (per_cu
, false);
22386 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22390 return die_type (die
, cu
);
22396 dwarf2_get_die_type (cu_offset die_offset
,
22397 struct dwarf2_per_cu_data
*per_cu
)
22399 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
22400 return get_die_type_at_offset (die_offset_sect
, per_cu
);
22403 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
22404 On entry *REF_CU is the CU of SRC_DIE.
22405 On exit *REF_CU is the CU of the result.
22406 Returns NULL if the referenced DIE isn't found. */
22408 static struct die_info
*
22409 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
22410 struct dwarf2_cu
**ref_cu
)
22412 struct die_info temp_die
;
22413 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
22414 struct die_info
*die
;
22416 /* While it might be nice to assert sig_type->type == NULL here,
22417 we can get here for DW_AT_imported_declaration where we need
22418 the DIE not the type. */
22420 /* If necessary, add it to the queue and load its DIEs. */
22422 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
22423 read_signatured_type (sig_type
);
22425 sig_cu
= sig_type
->per_cu
.cu
;
22426 gdb_assert (sig_cu
!= NULL
);
22427 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
22428 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
22429 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
22430 to_underlying (temp_die
.sect_off
));
22433 struct dwarf2_per_objfile
*dwarf2_per_objfile
22434 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
22436 /* For .gdb_index version 7 keep track of included TUs.
22437 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
22438 if (dwarf2_per_objfile
->index_table
!= NULL
22439 && dwarf2_per_objfile
->index_table
->version
<= 7)
22441 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
22446 sig_cu
->ancestor
= cu
;
22454 /* Follow signatured type referenced by ATTR in SRC_DIE.
22455 On entry *REF_CU is the CU of SRC_DIE.
22456 On exit *REF_CU is the CU of the result.
22457 The result is the DIE of the type.
22458 If the referenced type cannot be found an error is thrown. */
22460 static struct die_info
*
22461 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22462 struct dwarf2_cu
**ref_cu
)
22464 ULONGEST signature
= DW_SIGNATURE (attr
);
22465 struct signatured_type
*sig_type
;
22466 struct die_info
*die
;
22468 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
22470 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
22471 /* sig_type will be NULL if the signatured type is missing from
22473 if (sig_type
== NULL
)
22475 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22476 " from DIE at %s [in module %s]"),
22477 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22478 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22481 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
22484 dump_die_for_error (src_die
);
22485 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22486 " from DIE at %s [in module %s]"),
22487 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22488 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22494 /* Get the type specified by SIGNATURE referenced in DIE/CU,
22495 reading in and processing the type unit if necessary. */
22497 static struct type
*
22498 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
22499 struct dwarf2_cu
*cu
)
22501 struct dwarf2_per_objfile
*dwarf2_per_objfile
22502 = cu
->per_cu
->dwarf2_per_objfile
;
22503 struct signatured_type
*sig_type
;
22504 struct dwarf2_cu
*type_cu
;
22505 struct die_info
*type_die
;
22508 sig_type
= lookup_signatured_type (cu
, signature
);
22509 /* sig_type will be NULL if the signatured type is missing from
22511 if (sig_type
== NULL
)
22513 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22514 " from DIE at %s [in module %s]"),
22515 hex_string (signature
), sect_offset_str (die
->sect_off
),
22516 objfile_name (dwarf2_per_objfile
->objfile
));
22517 return build_error_marker_type (cu
, die
);
22520 /* If we already know the type we're done. */
22521 if (sig_type
->type
!= NULL
)
22522 return sig_type
->type
;
22525 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
22526 if (type_die
!= NULL
)
22528 /* N.B. We need to call get_die_type to ensure only one type for this DIE
22529 is created. This is important, for example, because for c++ classes
22530 we need TYPE_NAME set which is only done by new_symbol. Blech. */
22531 type
= read_type_die (type_die
, type_cu
);
22534 complaint (_("Dwarf Error: Cannot build signatured type %s"
22535 " referenced from DIE at %s [in module %s]"),
22536 hex_string (signature
), sect_offset_str (die
->sect_off
),
22537 objfile_name (dwarf2_per_objfile
->objfile
));
22538 type
= build_error_marker_type (cu
, die
);
22543 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22544 " from DIE at %s [in module %s]"),
22545 hex_string (signature
), sect_offset_str (die
->sect_off
),
22546 objfile_name (dwarf2_per_objfile
->objfile
));
22547 type
= build_error_marker_type (cu
, die
);
22549 sig_type
->type
= type
;
22554 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
22555 reading in and processing the type unit if necessary. */
22557 static struct type
*
22558 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
22559 struct dwarf2_cu
*cu
) /* ARI: editCase function */
22561 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
22562 if (attr
->form_is_ref ())
22564 struct dwarf2_cu
*type_cu
= cu
;
22565 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
22567 return read_type_die (type_die
, type_cu
);
22569 else if (attr
->form
== DW_FORM_ref_sig8
)
22571 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
22575 struct dwarf2_per_objfile
*dwarf2_per_objfile
22576 = cu
->per_cu
->dwarf2_per_objfile
;
22578 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
22579 " at %s [in module %s]"),
22580 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
22581 objfile_name (dwarf2_per_objfile
->objfile
));
22582 return build_error_marker_type (cu
, die
);
22586 /* Load the DIEs associated with type unit PER_CU into memory. */
22589 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
22591 struct signatured_type
*sig_type
;
22593 /* Caller is responsible for ensuring type_unit_groups don't get here. */
22594 gdb_assert (! per_cu
->type_unit_group_p ());
22596 /* We have the per_cu, but we need the signatured_type.
22597 Fortunately this is an easy translation. */
22598 gdb_assert (per_cu
->is_debug_types
);
22599 sig_type
= (struct signatured_type
*) per_cu
;
22601 gdb_assert (per_cu
->cu
== NULL
);
22603 read_signatured_type (sig_type
);
22605 gdb_assert (per_cu
->cu
!= NULL
);
22608 /* Read in a signatured type and build its CU and DIEs.
22609 If the type is a stub for the real type in a DWO file,
22610 read in the real type from the DWO file as well. */
22613 read_signatured_type (struct signatured_type
*sig_type
)
22615 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
22617 gdb_assert (per_cu
->is_debug_types
);
22618 gdb_assert (per_cu
->cu
== NULL
);
22620 cutu_reader
reader (per_cu
, NULL
, 0, false);
22622 if (!reader
.dummy_p
)
22624 struct dwarf2_cu
*cu
= reader
.cu
;
22625 const gdb_byte
*info_ptr
= reader
.info_ptr
;
22627 gdb_assert (cu
->die_hash
== NULL
);
22629 htab_create_alloc_ex (cu
->header
.length
/ 12,
22633 &cu
->comp_unit_obstack
,
22634 hashtab_obstack_allocate
,
22635 dummy_obstack_deallocate
);
22637 if (reader
.comp_unit_die
->has_children
)
22638 reader
.comp_unit_die
->child
22639 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
22640 reader
.comp_unit_die
);
22641 cu
->dies
= reader
.comp_unit_die
;
22642 /* comp_unit_die is not stored in die_hash, no need. */
22644 /* We try not to read any attributes in this function, because
22645 not all CUs needed for references have been loaded yet, and
22646 symbol table processing isn't initialized. But we have to
22647 set the CU language, or we won't be able to build types
22648 correctly. Similarly, if we do not read the producer, we can
22649 not apply producer-specific interpretation. */
22650 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
22655 sig_type
->per_cu
.tu_read
= 1;
22658 /* Decode simple location descriptions.
22659 Given a pointer to a dwarf block that defines a location, compute
22660 the location and return the value.
22662 NOTE drow/2003-11-18: This function is called in two situations
22663 now: for the address of static or global variables (partial symbols
22664 only) and for offsets into structures which are expected to be
22665 (more or less) constant. The partial symbol case should go away,
22666 and only the constant case should remain. That will let this
22667 function complain more accurately. A few special modes are allowed
22668 without complaint for global variables (for instance, global
22669 register values and thread-local values).
22671 A location description containing no operations indicates that the
22672 object is optimized out. The return value is 0 for that case.
22673 FIXME drow/2003-11-16: No callers check for this case any more; soon all
22674 callers will only want a very basic result and this can become a
22677 Note that stack[0] is unused except as a default error return. */
22680 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
22682 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22684 size_t size
= blk
->size
;
22685 const gdb_byte
*data
= blk
->data
;
22686 CORE_ADDR stack
[64];
22688 unsigned int bytes_read
, unsnd
;
22694 stack
[++stacki
] = 0;
22733 stack
[++stacki
] = op
- DW_OP_lit0
;
22768 stack
[++stacki
] = op
- DW_OP_reg0
;
22770 dwarf2_complex_location_expr_complaint ();
22774 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
22776 stack
[++stacki
] = unsnd
;
22778 dwarf2_complex_location_expr_complaint ();
22782 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
22787 case DW_OP_const1u
:
22788 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
22792 case DW_OP_const1s
:
22793 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
22797 case DW_OP_const2u
:
22798 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
22802 case DW_OP_const2s
:
22803 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
22807 case DW_OP_const4u
:
22808 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
22812 case DW_OP_const4s
:
22813 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
22817 case DW_OP_const8u
:
22818 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
22823 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
22829 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
22834 stack
[stacki
+ 1] = stack
[stacki
];
22839 stack
[stacki
- 1] += stack
[stacki
];
22843 case DW_OP_plus_uconst
:
22844 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
22850 stack
[stacki
- 1] -= stack
[stacki
];
22855 /* If we're not the last op, then we definitely can't encode
22856 this using GDB's address_class enum. This is valid for partial
22857 global symbols, although the variable's address will be bogus
22860 dwarf2_complex_location_expr_complaint ();
22863 case DW_OP_GNU_push_tls_address
:
22864 case DW_OP_form_tls_address
:
22865 /* The top of the stack has the offset from the beginning
22866 of the thread control block at which the variable is located. */
22867 /* Nothing should follow this operator, so the top of stack would
22869 /* This is valid for partial global symbols, but the variable's
22870 address will be bogus in the psymtab. Make it always at least
22871 non-zero to not look as a variable garbage collected by linker
22872 which have DW_OP_addr 0. */
22874 dwarf2_complex_location_expr_complaint ();
22878 case DW_OP_GNU_uninit
:
22882 case DW_OP_GNU_addr_index
:
22883 case DW_OP_GNU_const_index
:
22884 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
22891 const char *name
= get_DW_OP_name (op
);
22894 complaint (_("unsupported stack op: '%s'"),
22897 complaint (_("unsupported stack op: '%02x'"),
22901 return (stack
[stacki
]);
22904 /* Enforce maximum stack depth of SIZE-1 to avoid writing
22905 outside of the allocated space. Also enforce minimum>0. */
22906 if (stacki
>= ARRAY_SIZE (stack
) - 1)
22908 complaint (_("location description stack overflow"));
22914 complaint (_("location description stack underflow"));
22918 return (stack
[stacki
]);
22921 /* memory allocation interface */
22923 static struct dwarf_block
*
22924 dwarf_alloc_block (struct dwarf2_cu
*cu
)
22926 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
22929 static struct die_info
*
22930 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
22932 struct die_info
*die
;
22933 size_t size
= sizeof (struct die_info
);
22936 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
22938 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
22939 memset (die
, 0, sizeof (struct die_info
));
22945 /* Macro support. */
22947 /* An overload of dwarf_decode_macros that finds the correct section
22948 and ensures it is read in before calling the other overload. */
22951 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
22952 int section_is_gnu
)
22954 struct dwarf2_per_objfile
*dwarf2_per_objfile
22955 = cu
->per_cu
->dwarf2_per_objfile
;
22956 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22957 const struct line_header
*lh
= cu
->line_header
;
22958 unsigned int offset_size
= cu
->header
.offset_size
;
22959 struct dwarf2_section_info
*section
;
22960 const char *section_name
;
22962 if (cu
->dwo_unit
!= nullptr)
22964 if (section_is_gnu
)
22966 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
22967 section_name
= ".debug_macro.dwo";
22971 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
22972 section_name
= ".debug_macinfo.dwo";
22977 if (section_is_gnu
)
22979 section
= &dwarf2_per_objfile
->macro
;
22980 section_name
= ".debug_macro";
22984 section
= &dwarf2_per_objfile
->macinfo
;
22985 section_name
= ".debug_macinfo";
22989 section
->read (objfile
);
22990 if (section
->buffer
== nullptr)
22992 complaint (_("missing %s section"), section_name
);
22996 buildsym_compunit
*builder
= cu
->get_builder ();
22998 dwarf_decode_macros (dwarf2_per_objfile
, builder
, section
, lh
,
22999 offset_size
, offset
, section_is_gnu
);
23002 /* Return the .debug_loc section to use for CU.
23003 For DWO files use .debug_loc.dwo. */
23005 static struct dwarf2_section_info
*
23006 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23008 struct dwarf2_per_objfile
*dwarf2_per_objfile
23009 = cu
->per_cu
->dwarf2_per_objfile
;
23013 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23015 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23017 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
23018 : &dwarf2_per_objfile
->loc
);
23021 /* A helper function that fills in a dwarf2_loclist_baton. */
23024 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23025 struct dwarf2_loclist_baton
*baton
,
23026 const struct attribute
*attr
)
23028 struct dwarf2_per_objfile
*dwarf2_per_objfile
23029 = cu
->per_cu
->dwarf2_per_objfile
;
23030 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23032 section
->read (dwarf2_per_objfile
->objfile
);
23034 baton
->per_cu
= cu
->per_cu
;
23035 gdb_assert (baton
->per_cu
);
23036 /* We don't know how long the location list is, but make sure we
23037 don't run off the edge of the section. */
23038 baton
->size
= section
->size
- DW_UNSND (attr
);
23039 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23040 if (cu
->base_address
.has_value ())
23041 baton
->base_address
= *cu
->base_address
;
23043 baton
->base_address
= 0;
23044 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23048 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
23049 struct dwarf2_cu
*cu
, int is_block
)
23051 struct dwarf2_per_objfile
*dwarf2_per_objfile
23052 = cu
->per_cu
->dwarf2_per_objfile
;
23053 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23054 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23056 if (attr
->form_is_section_offset ()
23057 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
23058 the section. If so, fall through to the complaint in the
23060 && DW_UNSND (attr
) < section
->get_size (objfile
))
23062 struct dwarf2_loclist_baton
*baton
;
23064 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
23066 fill_in_loclist_baton (cu
, baton
, attr
);
23068 if (!cu
->base_address
.has_value ())
23069 complaint (_("Location list used without "
23070 "specifying the CU base address."));
23072 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23073 ? dwarf2_loclist_block_index
23074 : dwarf2_loclist_index
);
23075 SYMBOL_LOCATION_BATON (sym
) = baton
;
23079 struct dwarf2_locexpr_baton
*baton
;
23081 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
23082 baton
->per_cu
= cu
->per_cu
;
23083 gdb_assert (baton
->per_cu
);
23085 if (attr
->form_is_block ())
23087 /* Note that we're just copying the block's data pointer
23088 here, not the actual data. We're still pointing into the
23089 info_buffer for SYM's objfile; right now we never release
23090 that buffer, but when we do clean up properly this may
23092 baton
->size
= DW_BLOCK (attr
)->size
;
23093 baton
->data
= DW_BLOCK (attr
)->data
;
23097 dwarf2_invalid_attrib_class_complaint ("location description",
23098 sym
->natural_name ());
23102 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23103 ? dwarf2_locexpr_block_index
23104 : dwarf2_locexpr_index
);
23105 SYMBOL_LOCATION_BATON (sym
) = baton
;
23112 dwarf2_per_cu_data::objfile () const
23114 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23116 /* Return the master objfile, so that we can report and look up the
23117 correct file containing this variable. */
23118 if (objfile
->separate_debug_objfile_backlink
)
23119 objfile
= objfile
->separate_debug_objfile_backlink
;
23124 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
23125 (CU_HEADERP is unused in such case) or prepare a temporary copy at
23126 CU_HEADERP first. */
23128 static const struct comp_unit_head
*
23129 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
23130 const struct dwarf2_per_cu_data
*per_cu
)
23132 const gdb_byte
*info_ptr
;
23135 return &per_cu
->cu
->header
;
23137 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
23139 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
23140 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
23141 rcuh_kind::COMPILE
);
23149 dwarf2_per_cu_data::addr_size () const
23151 struct comp_unit_head cu_header_local
;
23152 const struct comp_unit_head
*cu_headerp
;
23154 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23156 return cu_headerp
->addr_size
;
23162 dwarf2_per_cu_data::offset_size () const
23164 struct comp_unit_head cu_header_local
;
23165 const struct comp_unit_head
*cu_headerp
;
23167 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23169 return cu_headerp
->offset_size
;
23175 dwarf2_per_cu_data::ref_addr_size () const
23177 struct comp_unit_head cu_header_local
;
23178 const struct comp_unit_head
*cu_headerp
;
23180 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23182 if (cu_headerp
->version
== 2)
23183 return cu_headerp
->addr_size
;
23185 return cu_headerp
->offset_size
;
23191 dwarf2_per_cu_data::text_offset () const
23193 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23195 return objfile
->text_section_offset ();
23201 dwarf2_per_cu_data::addr_type () const
23203 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23204 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
23205 struct type
*addr_type
= lookup_pointer_type (void_type
);
23206 int addr_size
= this->addr_size ();
23208 if (TYPE_LENGTH (addr_type
) == addr_size
)
23211 addr_type
= addr_sized_int_type (TYPE_UNSIGNED (addr_type
));
23215 /* A helper function for dwarf2_find_containing_comp_unit that returns
23216 the index of the result, and that searches a vector. It will
23217 return a result even if the offset in question does not actually
23218 occur in any CU. This is separate so that it can be unit
23222 dwarf2_find_containing_comp_unit
23223 (sect_offset sect_off
,
23224 unsigned int offset_in_dwz
,
23225 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
23230 high
= all_comp_units
.size () - 1;
23233 struct dwarf2_per_cu_data
*mid_cu
;
23234 int mid
= low
+ (high
- low
) / 2;
23236 mid_cu
= all_comp_units
[mid
];
23237 if (mid_cu
->is_dwz
> offset_in_dwz
23238 || (mid_cu
->is_dwz
== offset_in_dwz
23239 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
23244 gdb_assert (low
== high
);
23248 /* Locate the .debug_info compilation unit from CU's objfile which contains
23249 the DIE at OFFSET. Raises an error on failure. */
23251 static struct dwarf2_per_cu_data
*
23252 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23253 unsigned int offset_in_dwz
,
23254 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23257 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23258 dwarf2_per_objfile
->all_comp_units
);
23259 struct dwarf2_per_cu_data
*this_cu
23260 = dwarf2_per_objfile
->all_comp_units
[low
];
23262 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
23264 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23265 error (_("Dwarf Error: could not find partial DIE containing "
23266 "offset %s [in module %s]"),
23267 sect_offset_str (sect_off
),
23268 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
23270 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
23272 return dwarf2_per_objfile
->all_comp_units
[low
-1];
23276 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
23277 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23278 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
23279 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23286 namespace selftests
{
23287 namespace find_containing_comp_unit
{
23292 struct dwarf2_per_cu_data one
{};
23293 struct dwarf2_per_cu_data two
{};
23294 struct dwarf2_per_cu_data three
{};
23295 struct dwarf2_per_cu_data four
{};
23298 two
.sect_off
= sect_offset (one
.length
);
23303 four
.sect_off
= sect_offset (three
.length
);
23307 std::vector
<dwarf2_per_cu_data
*> units
;
23308 units
.push_back (&one
);
23309 units
.push_back (&two
);
23310 units
.push_back (&three
);
23311 units
.push_back (&four
);
23315 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
23316 SELF_CHECK (units
[result
] == &one
);
23317 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
23318 SELF_CHECK (units
[result
] == &one
);
23319 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
23320 SELF_CHECK (units
[result
] == &two
);
23322 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
23323 SELF_CHECK (units
[result
] == &three
);
23324 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
23325 SELF_CHECK (units
[result
] == &three
);
23326 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
23327 SELF_CHECK (units
[result
] == &four
);
23333 #endif /* GDB_SELF_TEST */
23335 /* Initialize dwarf2_cu CU, owned by PER_CU. */
23337 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
23338 : per_cu (per_cu_
),
23340 has_loclist (false),
23341 checked_producer (false),
23342 producer_is_gxx_lt_4_6 (false),
23343 producer_is_gcc_lt_4_3 (false),
23344 producer_is_icc (false),
23345 producer_is_icc_lt_14 (false),
23346 producer_is_codewarrior (false),
23347 processing_has_namespace_info (false)
23352 /* Destroy a dwarf2_cu. */
23354 dwarf2_cu::~dwarf2_cu ()
23359 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23362 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23363 enum language pretend_language
)
23365 struct attribute
*attr
;
23367 /* Set the language we're debugging. */
23368 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23369 if (attr
!= nullptr)
23370 set_cu_language (DW_UNSND (attr
), cu
);
23373 cu
->language
= pretend_language
;
23374 cu
->language_defn
= language_def (cu
->language
);
23377 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23380 /* Increase the age counter on each cached compilation unit, and free
23381 any that are too old. */
23384 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23386 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23388 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
23389 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23390 while (per_cu
!= NULL
)
23392 per_cu
->cu
->last_used
++;
23393 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23394 dwarf2_mark (per_cu
->cu
);
23395 per_cu
= per_cu
->cu
->read_in_chain
;
23398 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23399 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23400 while (per_cu
!= NULL
)
23402 struct dwarf2_per_cu_data
*next_cu
;
23404 next_cu
= per_cu
->cu
->read_in_chain
;
23406 if (!per_cu
->cu
->mark
)
23409 *last_chain
= next_cu
;
23412 last_chain
= &per_cu
->cu
->read_in_chain
;
23418 /* Remove a single compilation unit from the cache. */
23421 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
23423 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23424 struct dwarf2_per_objfile
*dwarf2_per_objfile
23425 = target_per_cu
->dwarf2_per_objfile
;
23427 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23428 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23429 while (per_cu
!= NULL
)
23431 struct dwarf2_per_cu_data
*next_cu
;
23433 next_cu
= per_cu
->cu
->read_in_chain
;
23435 if (per_cu
== target_per_cu
)
23439 *last_chain
= next_cu
;
23443 last_chain
= &per_cu
->cu
->read_in_chain
;
23449 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23450 We store these in a hash table separate from the DIEs, and preserve them
23451 when the DIEs are flushed out of cache.
23453 The CU "per_cu" pointer is needed because offset alone is not enough to
23454 uniquely identify the type. A file may have multiple .debug_types sections,
23455 or the type may come from a DWO file. Furthermore, while it's more logical
23456 to use per_cu->section+offset, with Fission the section with the data is in
23457 the DWO file but we don't know that section at the point we need it.
23458 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23459 because we can enter the lookup routine, get_die_type_at_offset, from
23460 outside this file, and thus won't necessarily have PER_CU->cu.
23461 Fortunately, PER_CU is stable for the life of the objfile. */
23463 struct dwarf2_per_cu_offset_and_type
23465 const struct dwarf2_per_cu_data
*per_cu
;
23466 sect_offset sect_off
;
23470 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23473 per_cu_offset_and_type_hash (const void *item
)
23475 const struct dwarf2_per_cu_offset_and_type
*ofs
23476 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23478 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23481 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23484 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23486 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23487 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23488 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23489 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23491 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23492 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23495 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23496 table if necessary. For convenience, return TYPE.
23498 The DIEs reading must have careful ordering to:
23499 * Not cause infinite loops trying to read in DIEs as a prerequisite for
23500 reading current DIE.
23501 * Not trying to dereference contents of still incompletely read in types
23502 while reading in other DIEs.
23503 * Enable referencing still incompletely read in types just by a pointer to
23504 the type without accessing its fields.
23506 Therefore caller should follow these rules:
23507 * Try to fetch any prerequisite types we may need to build this DIE type
23508 before building the type and calling set_die_type.
23509 * After building type call set_die_type for current DIE as soon as
23510 possible before fetching more types to complete the current type.
23511 * Make the type as complete as possible before fetching more types. */
23513 static struct type
*
23514 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23516 struct dwarf2_per_objfile
*dwarf2_per_objfile
23517 = cu
->per_cu
->dwarf2_per_objfile
;
23518 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23519 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23520 struct attribute
*attr
;
23521 struct dynamic_prop prop
;
23523 /* For Ada types, make sure that the gnat-specific data is always
23524 initialized (if not already set). There are a few types where
23525 we should not be doing so, because the type-specific area is
23526 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23527 where the type-specific area is used to store the floatformat).
23528 But this is not a problem, because the gnat-specific information
23529 is actually not needed for these types. */
23530 if (need_gnat_info (cu
)
23531 && TYPE_CODE (type
) != TYPE_CODE_FUNC
23532 && TYPE_CODE (type
) != TYPE_CODE_FLT
23533 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
23534 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
23535 && TYPE_CODE (type
) != TYPE_CODE_METHOD
23536 && !HAVE_GNAT_AUX_INFO (type
))
23537 INIT_GNAT_SPECIFIC (type
);
23539 /* Read DW_AT_allocated and set in type. */
23540 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23541 if (attr
!= NULL
&& attr
->form_is_block ())
23543 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23544 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23545 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
23547 else if (attr
!= NULL
)
23549 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
23550 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23551 sect_offset_str (die
->sect_off
));
23554 /* Read DW_AT_associated and set in type. */
23555 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23556 if (attr
!= NULL
&& attr
->form_is_block ())
23558 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23559 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23560 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
23562 else if (attr
!= NULL
)
23564 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
23565 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23566 sect_offset_str (die
->sect_off
));
23569 /* Read DW_AT_data_location and set in type. */
23570 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23571 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
23572 cu
->per_cu
->addr_type ()))
23573 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
23575 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23576 dwarf2_per_objfile
->die_type_hash
23577 = htab_up (htab_create_alloc (127,
23578 per_cu_offset_and_type_hash
,
23579 per_cu_offset_and_type_eq
,
23580 NULL
, xcalloc
, xfree
));
23582 ofs
.per_cu
= cu
->per_cu
;
23583 ofs
.sect_off
= die
->sect_off
;
23585 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23586 htab_find_slot (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
, INSERT
);
23588 complaint (_("A problem internal to GDB: DIE %s has type already set"),
23589 sect_offset_str (die
->sect_off
));
23590 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23591 struct dwarf2_per_cu_offset_and_type
);
23596 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23597 or return NULL if the die does not have a saved type. */
23599 static struct type
*
23600 get_die_type_at_offset (sect_offset sect_off
,
23601 struct dwarf2_per_cu_data
*per_cu
)
23603 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23604 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23606 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23609 ofs
.per_cu
= per_cu
;
23610 ofs
.sect_off
= sect_off
;
23611 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23612 htab_find (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
));
23619 /* Look up the type for DIE in CU in die_type_hash,
23620 or return NULL if DIE does not have a saved type. */
23622 static struct type
*
23623 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23625 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
23628 /* Add a dependence relationship from CU to REF_PER_CU. */
23631 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23632 struct dwarf2_per_cu_data
*ref_per_cu
)
23636 if (cu
->dependencies
== NULL
)
23638 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23639 NULL
, &cu
->comp_unit_obstack
,
23640 hashtab_obstack_allocate
,
23641 dummy_obstack_deallocate
);
23643 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23645 *slot
= ref_per_cu
;
23648 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23649 Set the mark field in every compilation unit in the
23650 cache that we must keep because we are keeping CU. */
23653 dwarf2_mark_helper (void **slot
, void *data
)
23655 struct dwarf2_per_cu_data
*per_cu
;
23657 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23659 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23660 reading of the chain. As such dependencies remain valid it is not much
23661 useful to track and undo them during QUIT cleanups. */
23662 if (per_cu
->cu
== NULL
)
23665 if (per_cu
->cu
->mark
)
23667 per_cu
->cu
->mark
= true;
23669 if (per_cu
->cu
->dependencies
!= NULL
)
23670 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23675 /* Set the mark field in CU and in every other compilation unit in the
23676 cache that we must keep because we are keeping CU. */
23679 dwarf2_mark (struct dwarf2_cu
*cu
)
23684 if (cu
->dependencies
!= NULL
)
23685 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23689 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23693 per_cu
->cu
->mark
= false;
23694 per_cu
= per_cu
->cu
->read_in_chain
;
23698 /* Trivial hash function for partial_die_info: the hash value of a DIE
23699 is its offset in .debug_info for this objfile. */
23702 partial_die_hash (const void *item
)
23704 const struct partial_die_info
*part_die
23705 = (const struct partial_die_info
*) item
;
23707 return to_underlying (part_die
->sect_off
);
23710 /* Trivial comparison function for partial_die_info structures: two DIEs
23711 are equal if they have the same offset. */
23714 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23716 const struct partial_die_info
*part_die_lhs
23717 = (const struct partial_die_info
*) item_lhs
;
23718 const struct partial_die_info
*part_die_rhs
23719 = (const struct partial_die_info
*) item_rhs
;
23721 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23724 struct cmd_list_element
*set_dwarf_cmdlist
;
23725 struct cmd_list_element
*show_dwarf_cmdlist
;
23728 show_check_physname (struct ui_file
*file
, int from_tty
,
23729 struct cmd_list_element
*c
, const char *value
)
23731 fprintf_filtered (file
,
23732 _("Whether to check \"physname\" is %s.\n"),
23736 void _initialize_dwarf2_read ();
23738 _initialize_dwarf2_read ()
23740 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
23741 Set DWARF specific variables.\n\
23742 Configure DWARF variables such as the cache size."),
23743 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23744 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23746 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
23747 Show DWARF specific variables.\n\
23748 Show DWARF variables such as the cache size."),
23749 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23750 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23752 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23753 &dwarf_max_cache_age
, _("\
23754 Set the upper bound on the age of cached DWARF compilation units."), _("\
23755 Show the upper bound on the age of cached DWARF compilation units."), _("\
23756 A higher limit means that cached compilation units will be stored\n\
23757 in memory longer, and more total memory will be used. Zero disables\n\
23758 caching, which can slow down startup."),
23760 show_dwarf_max_cache_age
,
23761 &set_dwarf_cmdlist
,
23762 &show_dwarf_cmdlist
);
23764 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23765 Set debugging of the DWARF reader."), _("\
23766 Show debugging of the DWARF reader."), _("\
23767 When enabled (non-zero), debugging messages are printed during DWARF\n\
23768 reading and symtab expansion. A value of 1 (one) provides basic\n\
23769 information. A value greater than 1 provides more verbose information."),
23772 &setdebuglist
, &showdebuglist
);
23774 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23775 Set debugging of the DWARF DIE reader."), _("\
23776 Show debugging of the DWARF DIE reader."), _("\
23777 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23778 The value is the maximum depth to print."),
23781 &setdebuglist
, &showdebuglist
);
23783 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23784 Set debugging of the dwarf line reader."), _("\
23785 Show debugging of the dwarf line reader."), _("\
23786 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23787 A value of 1 (one) provides basic information.\n\
23788 A value greater than 1 provides more verbose information."),
23791 &setdebuglist
, &showdebuglist
);
23793 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23794 Set cross-checking of \"physname\" code against demangler."), _("\
23795 Show cross-checking of \"physname\" code against demangler."), _("\
23796 When enabled, GDB's internal \"physname\" code is checked against\n\
23798 NULL
, show_check_physname
,
23799 &setdebuglist
, &showdebuglist
);
23801 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23802 no_class
, &use_deprecated_index_sections
, _("\
23803 Set whether to use deprecated gdb_index sections."), _("\
23804 Show whether to use deprecated gdb_index sections."), _("\
23805 When enabled, deprecated .gdb_index sections are used anyway.\n\
23806 Normally they are ignored either because of a missing feature or\n\
23807 performance issue.\n\
23808 Warning: This option must be enabled before gdb reads the file."),
23811 &setlist
, &showlist
);
23813 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23814 &dwarf2_locexpr_funcs
);
23815 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23816 &dwarf2_loclist_funcs
);
23818 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23819 &dwarf2_block_frame_base_locexpr_funcs
);
23820 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23821 &dwarf2_block_frame_base_loclist_funcs
);
23824 selftests::register_test ("dw2_expand_symtabs_matching",
23825 selftests::dw2_expand_symtabs_matching::run_test
);
23826 selftests::register_test ("dwarf2_find_containing_comp_unit",
23827 selftests::find_containing_comp_unit::run_test
);