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_bfd::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_bfd->type_unit_groups is a pointer to
603 an object of this type. */
605 struct type_unit_group
607 /* dwarf2read.c's main "handle" on a TU symtab.
608 To simplify things we create an artificial CU that "includes" all the
609 type units using this stmt_list so that the rest of the code still has
610 a "per_cu" handle on the symtab. */
611 struct dwarf2_per_cu_data per_cu
;
613 /* The TUs that share this DW_AT_stmt_list entry.
614 This is added to while parsing type units to build partial symtabs,
615 and is deleted afterwards and not used again. */
616 std::vector
<signatured_type
*> *tus
;
618 /* The compunit symtab.
619 Type units in a group needn't all be defined in the same source file,
620 so we create an essentially anonymous symtab as the compunit symtab. */
621 struct compunit_symtab
*compunit_symtab
;
623 /* The data used to construct the hash key. */
624 struct stmt_list_hash hash
;
626 /* The symbol tables for this TU (obtained from the files listed in
628 WARNING: The order of entries here must match the order of entries
629 in the line header. After the first TU using this type_unit_group, the
630 line header for the subsequent TUs is recreated from this. This is done
631 because we need to use the same symtabs for each TU using the same
632 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
633 there's no guarantee the line header doesn't have duplicate entries. */
634 struct symtab
**symtabs
;
637 /* These sections are what may appear in a (real or virtual) DWO file. */
641 struct dwarf2_section_info abbrev
;
642 struct dwarf2_section_info line
;
643 struct dwarf2_section_info loc
;
644 struct dwarf2_section_info loclists
;
645 struct dwarf2_section_info macinfo
;
646 struct dwarf2_section_info macro
;
647 struct dwarf2_section_info str
;
648 struct dwarf2_section_info str_offsets
;
649 /* In the case of a virtual DWO file, these two are unused. */
650 struct dwarf2_section_info info
;
651 std::vector
<dwarf2_section_info
> types
;
654 /* CUs/TUs in DWP/DWO files. */
658 /* Backlink to the containing struct dwo_file. */
659 struct dwo_file
*dwo_file
;
661 /* The "id" that distinguishes this CU/TU.
662 .debug_info calls this "dwo_id", .debug_types calls this "signature".
663 Since signatures came first, we stick with it for consistency. */
666 /* The section this CU/TU lives in, in the DWO file. */
667 struct dwarf2_section_info
*section
;
669 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
670 sect_offset sect_off
;
673 /* For types, offset in the type's DIE of the type defined by this TU. */
674 cu_offset type_offset_in_tu
;
677 /* include/dwarf2.h defines the DWP section codes.
678 It defines a max value but it doesn't define a min value, which we
679 use for error checking, so provide one. */
681 enum dwp_v2_section_ids
686 /* Data for one DWO file.
688 This includes virtual DWO files (a virtual DWO file is a DWO file as it
689 appears in a DWP file). DWP files don't really have DWO files per se -
690 comdat folding of types "loses" the DWO file they came from, and from
691 a high level view DWP files appear to contain a mass of random types.
692 However, to maintain consistency with the non-DWP case we pretend DWP
693 files contain virtual DWO files, and we assign each TU with one virtual
694 DWO file (generally based on the line and abbrev section offsets -
695 a heuristic that seems to work in practice). */
699 dwo_file () = default;
700 DISABLE_COPY_AND_ASSIGN (dwo_file
);
702 /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute.
703 For virtual DWO files the name is constructed from the section offsets
704 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
705 from related CU+TUs. */
706 const char *dwo_name
= nullptr;
708 /* The DW_AT_comp_dir attribute. */
709 const char *comp_dir
= nullptr;
711 /* The bfd, when the file is open. Otherwise this is NULL.
712 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
713 gdb_bfd_ref_ptr dbfd
;
715 /* The sections that make up this DWO file.
716 Remember that for virtual DWO files in DWP V2, these are virtual
717 sections (for lack of a better name). */
718 struct dwo_sections sections
{};
720 /* The CUs in the file.
721 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
722 an extension to handle LLVM's Link Time Optimization output (where
723 multiple source files may be compiled into a single object/dwo pair). */
726 /* Table of TUs in the file.
727 Each element is a struct dwo_unit. */
731 /* These sections are what may appear in a DWP file. */
735 /* These are used by both DWP version 1 and 2. */
736 struct dwarf2_section_info str
;
737 struct dwarf2_section_info cu_index
;
738 struct dwarf2_section_info tu_index
;
740 /* These are only used by DWP version 2 files.
741 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
742 sections are referenced by section number, and are not recorded here.
743 In DWP version 2 there is at most one copy of all these sections, each
744 section being (effectively) comprised of the concatenation of all of the
745 individual sections that exist in the version 1 format.
746 To keep the code simple we treat each of these concatenated pieces as a
747 section itself (a virtual section?). */
748 struct dwarf2_section_info abbrev
;
749 struct dwarf2_section_info info
;
750 struct dwarf2_section_info line
;
751 struct dwarf2_section_info loc
;
752 struct dwarf2_section_info macinfo
;
753 struct dwarf2_section_info macro
;
754 struct dwarf2_section_info str_offsets
;
755 struct dwarf2_section_info types
;
758 /* These sections are what may appear in a virtual DWO file in DWP version 1.
759 A virtual DWO file is a DWO file as it appears in a DWP file. */
761 struct virtual_v1_dwo_sections
763 struct dwarf2_section_info abbrev
;
764 struct dwarf2_section_info line
;
765 struct dwarf2_section_info loc
;
766 struct dwarf2_section_info macinfo
;
767 struct dwarf2_section_info macro
;
768 struct dwarf2_section_info str_offsets
;
769 /* Each DWP hash table entry records one CU or one TU.
770 That is recorded here, and copied to dwo_unit.section. */
771 struct dwarf2_section_info info_or_types
;
774 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
775 In version 2, the sections of the DWO files are concatenated together
776 and stored in one section of that name. Thus each ELF section contains
777 several "virtual" sections. */
779 struct virtual_v2_dwo_sections
781 bfd_size_type abbrev_offset
;
782 bfd_size_type abbrev_size
;
784 bfd_size_type line_offset
;
785 bfd_size_type line_size
;
787 bfd_size_type loc_offset
;
788 bfd_size_type loc_size
;
790 bfd_size_type macinfo_offset
;
791 bfd_size_type macinfo_size
;
793 bfd_size_type macro_offset
;
794 bfd_size_type macro_size
;
796 bfd_size_type str_offsets_offset
;
797 bfd_size_type str_offsets_size
;
799 /* Each DWP hash table entry records one CU or one TU.
800 That is recorded here, and copied to dwo_unit.section. */
801 bfd_size_type info_or_types_offset
;
802 bfd_size_type info_or_types_size
;
805 /* Contents of DWP hash tables. */
807 struct dwp_hash_table
809 uint32_t version
, nr_columns
;
810 uint32_t nr_units
, nr_slots
;
811 const gdb_byte
*hash_table
, *unit_table
;
816 const gdb_byte
*indices
;
820 /* This is indexed by column number and gives the id of the section
822 #define MAX_NR_V2_DWO_SECTIONS \
823 (1 /* .debug_info or .debug_types */ \
824 + 1 /* .debug_abbrev */ \
825 + 1 /* .debug_line */ \
826 + 1 /* .debug_loc */ \
827 + 1 /* .debug_str_offsets */ \
828 + 1 /* .debug_macro or .debug_macinfo */)
829 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
830 const gdb_byte
*offsets
;
831 const gdb_byte
*sizes
;
836 /* Data for one DWP file. */
840 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
842 dbfd (std::move (abfd
))
846 /* Name of the file. */
849 /* File format version. */
853 gdb_bfd_ref_ptr dbfd
;
855 /* Section info for this file. */
856 struct dwp_sections sections
{};
858 /* Table of CUs in the file. */
859 const struct dwp_hash_table
*cus
= nullptr;
861 /* Table of TUs in the file. */
862 const struct dwp_hash_table
*tus
= nullptr;
864 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
868 /* Table to map ELF section numbers to their sections.
869 This is only needed for the DWP V1 file format. */
870 unsigned int num_sections
= 0;
871 asection
**elf_sections
= nullptr;
874 /* Struct used to pass misc. parameters to read_die_and_children, et
875 al. which are used for both .debug_info and .debug_types dies.
876 All parameters here are unchanging for the life of the call. This
877 struct exists to abstract away the constant parameters of die reading. */
879 struct die_reader_specs
881 /* The bfd of die_section. */
884 /* The CU of the DIE we are parsing. */
885 struct dwarf2_cu
*cu
;
887 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
888 struct dwo_file
*dwo_file
;
890 /* The section the die comes from.
891 This is either .debug_info or .debug_types, or the .dwo variants. */
892 struct dwarf2_section_info
*die_section
;
894 /* die_section->buffer. */
895 const gdb_byte
*buffer
;
897 /* The end of the buffer. */
898 const gdb_byte
*buffer_end
;
900 /* The abbreviation table to use when reading the DIEs. */
901 struct abbrev_table
*abbrev_table
;
904 /* A subclass of die_reader_specs that holds storage and has complex
905 constructor and destructor behavior. */
907 class cutu_reader
: public die_reader_specs
911 cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
912 struct abbrev_table
*abbrev_table
,
916 explicit cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
917 struct dwarf2_cu
*parent_cu
= nullptr,
918 struct dwo_file
*dwo_file
= nullptr);
920 DISABLE_COPY_AND_ASSIGN (cutu_reader
);
922 const gdb_byte
*info_ptr
= nullptr;
923 struct die_info
*comp_unit_die
= nullptr;
924 bool dummy_p
= false;
926 /* Release the new CU, putting it on the chain. This cannot be done
931 void init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
932 int use_existing_cu
);
934 struct dwarf2_per_cu_data
*m_this_cu
;
935 std::unique_ptr
<dwarf2_cu
> m_new_cu
;
937 /* The ordinary abbreviation table. */
938 abbrev_table_up m_abbrev_table_holder
;
940 /* The DWO abbreviation table. */
941 abbrev_table_up m_dwo_abbrev_table
;
944 /* When we construct a partial symbol table entry we only
945 need this much information. */
946 struct partial_die_info
: public allocate_on_obstack
948 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
950 /* Disable assign but still keep copy ctor, which is needed
951 load_partial_dies. */
952 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
954 /* Adjust the partial die before generating a symbol for it. This
955 function may set the is_external flag or change the DIE's
957 void fixup (struct dwarf2_cu
*cu
);
959 /* Read a minimal amount of information into the minimal die
961 const gdb_byte
*read (const struct die_reader_specs
*reader
,
962 const struct abbrev_info
&abbrev
,
963 const gdb_byte
*info_ptr
);
965 /* Offset of this DIE. */
966 const sect_offset sect_off
;
968 /* DWARF-2 tag for this DIE. */
969 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
971 /* Assorted flags describing the data found in this DIE. */
972 const unsigned int has_children
: 1;
974 unsigned int is_external
: 1;
975 unsigned int is_declaration
: 1;
976 unsigned int has_type
: 1;
977 unsigned int has_specification
: 1;
978 unsigned int has_pc_info
: 1;
979 unsigned int may_be_inlined
: 1;
981 /* This DIE has been marked DW_AT_main_subprogram. */
982 unsigned int main_subprogram
: 1;
984 /* Flag set if the SCOPE field of this structure has been
986 unsigned int scope_set
: 1;
988 /* Flag set if the DIE has a byte_size attribute. */
989 unsigned int has_byte_size
: 1;
991 /* Flag set if the DIE has a DW_AT_const_value attribute. */
992 unsigned int has_const_value
: 1;
994 /* Flag set if any of the DIE's children are template arguments. */
995 unsigned int has_template_arguments
: 1;
997 /* Flag set if fixup has been called on this die. */
998 unsigned int fixup_called
: 1;
1000 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1001 unsigned int is_dwz
: 1;
1003 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1004 unsigned int spec_is_dwz
: 1;
1006 /* The name of this DIE. Normally the value of DW_AT_name, but
1007 sometimes a default name for unnamed DIEs. */
1008 const char *name
= nullptr;
1010 /* The linkage name, if present. */
1011 const char *linkage_name
= nullptr;
1013 /* The scope to prepend to our children. This is generally
1014 allocated on the comp_unit_obstack, so will disappear
1015 when this compilation unit leaves the cache. */
1016 const char *scope
= nullptr;
1018 /* Some data associated with the partial DIE. The tag determines
1019 which field is live. */
1022 /* The location description associated with this DIE, if any. */
1023 struct dwarf_block
*locdesc
;
1024 /* The offset of an import, for DW_TAG_imported_unit. */
1025 sect_offset sect_off
;
1028 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1029 CORE_ADDR lowpc
= 0;
1030 CORE_ADDR highpc
= 0;
1032 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1033 DW_AT_sibling, if any. */
1034 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1035 could return DW_AT_sibling values to its caller load_partial_dies. */
1036 const gdb_byte
*sibling
= nullptr;
1038 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1039 DW_AT_specification (or DW_AT_abstract_origin or
1040 DW_AT_extension). */
1041 sect_offset spec_offset
{};
1043 /* Pointers to this DIE's parent, first child, and next sibling,
1045 struct partial_die_info
*die_parent
= nullptr;
1046 struct partial_die_info
*die_child
= nullptr;
1047 struct partial_die_info
*die_sibling
= nullptr;
1049 friend struct partial_die_info
*
1050 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1053 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1054 partial_die_info (sect_offset sect_off
)
1055 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1059 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1061 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1066 has_specification
= 0;
1069 main_subprogram
= 0;
1072 has_const_value
= 0;
1073 has_template_arguments
= 0;
1080 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1081 but this would require a corresponding change in unpack_field_as_long
1083 static int bits_per_byte
= 8;
1085 struct variant_part_builder
;
1087 /* When reading a variant, we track a bit more information about the
1088 field, and store it in an object of this type. */
1090 struct variant_field
1092 int first_field
= -1;
1093 int last_field
= -1;
1095 /* A variant can contain other variant parts. */
1096 std::vector
<variant_part_builder
> variant_parts
;
1098 /* If we see a DW_TAG_variant, then this will be set if this is the
1100 bool default_branch
= false;
1101 /* If we see a DW_AT_discr_value, then this will be the discriminant
1103 ULONGEST discriminant_value
= 0;
1104 /* If we see a DW_AT_discr_list, then this is a pointer to the list
1106 struct dwarf_block
*discr_list_data
= nullptr;
1109 /* This represents a DW_TAG_variant_part. */
1111 struct variant_part_builder
1113 /* The offset of the discriminant field. */
1114 sect_offset discriminant_offset
{};
1116 /* Variants that are direct children of this variant part. */
1117 std::vector
<variant_field
> variants
;
1119 /* True if we're currently reading a variant. */
1120 bool processing_variant
= false;
1125 int accessibility
= 0;
1127 /* Variant parts need to find the discriminant, which is a DIE
1128 reference. We track the section offset of each field to make
1131 struct field field
{};
1136 const char *name
= nullptr;
1137 std::vector
<struct fn_field
> fnfields
;
1140 /* The routines that read and process dies for a C struct or C++ class
1141 pass lists of data member fields and lists of member function fields
1142 in an instance of a field_info structure, as defined below. */
1145 /* List of data member and baseclasses fields. */
1146 std::vector
<struct nextfield
> fields
;
1147 std::vector
<struct nextfield
> baseclasses
;
1149 /* Set if the accessibility of one of the fields is not public. */
1150 int non_public_fields
= 0;
1152 /* Member function fieldlist array, contains name of possibly overloaded
1153 member function, number of overloaded member functions and a pointer
1154 to the head of the member function field chain. */
1155 std::vector
<struct fnfieldlist
> fnfieldlists
;
1157 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1158 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1159 std::vector
<struct decl_field
> typedef_field_list
;
1161 /* Nested types defined by this class and the number of elements in this
1163 std::vector
<struct decl_field
> nested_types_list
;
1165 /* If non-null, this is the variant part we are currently
1167 variant_part_builder
*current_variant_part
= nullptr;
1168 /* This holds all the top-level variant parts attached to the type
1170 std::vector
<variant_part_builder
> variant_parts
;
1172 /* Return the total number of fields (including baseclasses). */
1173 int nfields () const
1175 return fields
.size () + baseclasses
.size ();
1179 /* Loaded secondary compilation units are kept in memory until they
1180 have not been referenced for the processing of this many
1181 compilation units. Set this to zero to disable caching. Cache
1182 sizes of up to at least twenty will improve startup time for
1183 typical inter-CU-reference binaries, at an obvious memory cost. */
1184 static int dwarf_max_cache_age
= 5;
1186 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1187 struct cmd_list_element
*c
, const char *value
)
1189 fprintf_filtered (file
, _("The upper bound on the age of cached "
1190 "DWARF compilation units is %s.\n"),
1194 /* local function prototypes */
1196 static void dwarf2_find_base_address (struct die_info
*die
,
1197 struct dwarf2_cu
*cu
);
1199 static dwarf2_psymtab
*create_partial_symtab
1200 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1202 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1203 const gdb_byte
*info_ptr
,
1204 struct die_info
*type_unit_die
);
1206 static void dwarf2_build_psymtabs_hard
1207 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1209 static void scan_partial_symbols (struct partial_die_info
*,
1210 CORE_ADDR
*, CORE_ADDR
*,
1211 int, struct dwarf2_cu
*);
1213 static void add_partial_symbol (struct partial_die_info
*,
1214 struct dwarf2_cu
*);
1216 static void add_partial_namespace (struct partial_die_info
*pdi
,
1217 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1218 int set_addrmap
, struct dwarf2_cu
*cu
);
1220 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1221 CORE_ADDR
*highpc
, int set_addrmap
,
1222 struct dwarf2_cu
*cu
);
1224 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1225 struct dwarf2_cu
*cu
);
1227 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1228 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1229 int need_pc
, struct dwarf2_cu
*cu
);
1231 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1233 static struct partial_die_info
*load_partial_dies
1234 (const struct die_reader_specs
*, const gdb_byte
*, int);
1236 /* A pair of partial_die_info and compilation unit. */
1237 struct cu_partial_die_info
1239 /* The compilation unit of the partial_die_info. */
1240 struct dwarf2_cu
*cu
;
1241 /* A partial_die_info. */
1242 struct partial_die_info
*pdi
;
1244 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1250 cu_partial_die_info () = delete;
1253 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1254 struct dwarf2_cu
*);
1256 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1257 struct attribute
*, struct attr_abbrev
*,
1258 const gdb_byte
*, bool *need_reprocess
);
1260 static void read_attribute_reprocess (const struct die_reader_specs
*reader
,
1261 struct attribute
*attr
);
1263 static CORE_ADDR
read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
);
1265 static sect_offset read_abbrev_offset
1266 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1267 struct dwarf2_section_info
*, sect_offset
);
1269 static const char *read_indirect_string
1270 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1271 const struct comp_unit_head
*, unsigned int *);
1273 static const char *read_indirect_string_at_offset
1274 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, LONGEST str_offset
);
1276 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1280 static const char *read_dwo_str_index (const struct die_reader_specs
*reader
,
1281 ULONGEST str_index
);
1283 static const char *read_stub_str_index (struct dwarf2_cu
*cu
,
1284 ULONGEST str_index
);
1286 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1288 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1289 struct dwarf2_cu
*);
1291 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1292 struct dwarf2_cu
*cu
);
1294 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1296 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1297 struct dwarf2_cu
*cu
);
1299 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1301 static struct die_info
*die_specification (struct die_info
*die
,
1302 struct dwarf2_cu
**);
1304 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1305 struct dwarf2_cu
*cu
);
1307 static void dwarf_decode_lines (struct line_header
*, const char *,
1308 struct dwarf2_cu
*, dwarf2_psymtab
*,
1309 CORE_ADDR
, int decode_mapping
);
1311 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1314 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1315 struct dwarf2_cu
*, struct symbol
* = NULL
);
1317 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1318 struct dwarf2_cu
*);
1320 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1323 struct obstack
*obstack
,
1324 struct dwarf2_cu
*cu
, LONGEST
*value
,
1325 const gdb_byte
**bytes
,
1326 struct dwarf2_locexpr_baton
**baton
);
1328 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1330 static int need_gnat_info (struct dwarf2_cu
*);
1332 static struct type
*die_descriptive_type (struct die_info
*,
1333 struct dwarf2_cu
*);
1335 static void set_descriptive_type (struct type
*, struct die_info
*,
1336 struct dwarf2_cu
*);
1338 static struct type
*die_containing_type (struct die_info
*,
1339 struct dwarf2_cu
*);
1341 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1342 struct dwarf2_cu
*);
1344 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1346 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1348 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1350 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1351 const char *suffix
, int physname
,
1352 struct dwarf2_cu
*cu
);
1354 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1356 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1358 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1360 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1362 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1364 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1366 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1367 struct dwarf2_cu
*, dwarf2_psymtab
*);
1369 /* Return the .debug_loclists section to use for cu. */
1370 static struct dwarf2_section_info
*cu_debug_loc_section (struct dwarf2_cu
*cu
);
1372 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1373 values. Keep the items ordered with increasing constraints compliance. */
1376 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1377 PC_BOUNDS_NOT_PRESENT
,
1379 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1380 were present but they do not form a valid range of PC addresses. */
1383 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1386 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1390 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1391 CORE_ADDR
*, CORE_ADDR
*,
1395 static void get_scope_pc_bounds (struct die_info
*,
1396 CORE_ADDR
*, CORE_ADDR
*,
1397 struct dwarf2_cu
*);
1399 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1400 CORE_ADDR
, struct dwarf2_cu
*);
1402 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1403 struct dwarf2_cu
*);
1405 static void dwarf2_attach_fields_to_type (struct field_info
*,
1406 struct type
*, struct dwarf2_cu
*);
1408 static void dwarf2_add_member_fn (struct field_info
*,
1409 struct die_info
*, struct type
*,
1410 struct dwarf2_cu
*);
1412 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1414 struct dwarf2_cu
*);
1416 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1418 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1420 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1422 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1424 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1426 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1428 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1430 static struct type
*read_module_type (struct die_info
*die
,
1431 struct dwarf2_cu
*cu
);
1433 static const char *namespace_name (struct die_info
*die
,
1434 int *is_anonymous
, struct dwarf2_cu
*);
1436 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1438 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*,
1441 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1442 struct dwarf2_cu
*);
1444 static struct die_info
*read_die_and_siblings_1
1445 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1448 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1449 const gdb_byte
*info_ptr
,
1450 const gdb_byte
**new_info_ptr
,
1451 struct die_info
*parent
);
1453 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1454 struct die_info
**, const gdb_byte
*,
1457 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1458 struct die_info
**, const gdb_byte
*);
1460 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1462 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1465 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1467 static const char *dwarf2_full_name (const char *name
,
1468 struct die_info
*die
,
1469 struct dwarf2_cu
*cu
);
1471 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1472 struct dwarf2_cu
*cu
);
1474 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1475 struct dwarf2_cu
**);
1477 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1479 static void dump_die_for_error (struct die_info
*);
1481 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1484 /*static*/ void dump_die (struct die_info
*, int max_level
);
1486 static void store_in_ref_table (struct die_info
*,
1487 struct dwarf2_cu
*);
1489 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1490 const struct attribute
*,
1491 struct dwarf2_cu
**);
1493 static struct die_info
*follow_die_ref (struct die_info
*,
1494 const struct attribute
*,
1495 struct dwarf2_cu
**);
1497 static struct die_info
*follow_die_sig (struct die_info
*,
1498 const struct attribute
*,
1499 struct dwarf2_cu
**);
1501 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1502 struct dwarf2_cu
*);
1504 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1505 const struct attribute
*,
1506 struct dwarf2_cu
*);
1508 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1510 static void read_signatured_type (struct signatured_type
*);
1512 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1513 struct die_info
*die
, struct dwarf2_cu
*cu
,
1514 struct dynamic_prop
*prop
, struct type
*type
);
1516 /* memory allocation interface */
1518 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1520 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1522 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1524 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1525 struct dwarf2_loclist_baton
*baton
,
1526 const struct attribute
*attr
);
1528 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1530 struct dwarf2_cu
*cu
,
1533 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1534 const gdb_byte
*info_ptr
,
1535 struct abbrev_info
*abbrev
);
1537 static hashval_t
partial_die_hash (const void *item
);
1539 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1541 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1542 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1543 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1545 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1546 struct die_info
*comp_unit_die
,
1547 enum language pretend_language
);
1549 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1551 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1553 static struct type
*set_die_type (struct die_info
*, struct type
*,
1554 struct dwarf2_cu
*);
1556 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1558 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1560 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1563 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1566 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1569 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1570 struct dwarf2_per_cu_data
*);
1572 static void dwarf2_mark (struct dwarf2_cu
*);
1574 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1576 static struct type
*get_die_type_at_offset (sect_offset
,
1577 struct dwarf2_per_cu_data
*);
1579 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1581 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1582 enum language pretend_language
);
1584 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1586 /* Class, the destructor of which frees all allocated queue entries. This
1587 will only have work to do if an error was thrown while processing the
1588 dwarf. If no error was thrown then the queue entries should have all
1589 been processed, and freed, as we went along. */
1591 class dwarf2_queue_guard
1594 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1595 : m_per_objfile (per_objfile
)
1599 /* Free any entries remaining on the queue. There should only be
1600 entries left if we hit an error while processing the dwarf. */
1601 ~dwarf2_queue_guard ()
1603 /* Ensure that no memory is allocated by the queue. */
1604 std::queue
<dwarf2_queue_item
> empty
;
1605 std::swap (m_per_objfile
->per_bfd
->queue
, empty
);
1608 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1611 dwarf2_per_objfile
*m_per_objfile
;
1614 dwarf2_queue_item::~dwarf2_queue_item ()
1616 /* Anything still marked queued is likely to be in an
1617 inconsistent state, so discard it. */
1620 if (per_cu
->cu
!= NULL
)
1621 free_one_cached_comp_unit (per_cu
);
1626 /* The return type of find_file_and_directory. Note, the enclosed
1627 string pointers are only valid while this object is valid. */
1629 struct file_and_directory
1631 /* The filename. This is never NULL. */
1634 /* The compilation directory. NULL if not known. If we needed to
1635 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1636 points directly to the DW_AT_comp_dir string attribute owned by
1637 the obstack that owns the DIE. */
1638 const char *comp_dir
;
1640 /* If we needed to build a new string for comp_dir, this is what
1641 owns the storage. */
1642 std::string comp_dir_storage
;
1645 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1646 struct dwarf2_cu
*cu
);
1648 static htab_up
allocate_signatured_type_table ();
1650 static htab_up
allocate_dwo_unit_table ();
1652 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1653 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1654 struct dwp_file
*dwp_file
, const char *comp_dir
,
1655 ULONGEST signature
, int is_debug_types
);
1657 static struct dwp_file
*get_dwp_file
1658 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1660 static struct dwo_unit
*lookup_dwo_comp_unit
1661 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1663 static struct dwo_unit
*lookup_dwo_type_unit
1664 (struct signatured_type
*, const char *, const char *);
1666 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1668 /* A unique pointer to a dwo_file. */
1670 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1672 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1674 static void check_producer (struct dwarf2_cu
*cu
);
1676 static void free_line_header_voidp (void *arg
);
1678 /* Various complaints about symbol reading that don't abort the process. */
1681 dwarf2_debug_line_missing_file_complaint (void)
1683 complaint (_(".debug_line section has line data without a file"));
1687 dwarf2_debug_line_missing_end_sequence_complaint (void)
1689 complaint (_(".debug_line section has line "
1690 "program sequence without an end"));
1694 dwarf2_complex_location_expr_complaint (void)
1696 complaint (_("location expression too complex"));
1700 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1703 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1708 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1710 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1714 /* Hash function for line_header_hash. */
1717 line_header_hash (const struct line_header
*ofs
)
1719 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1722 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1725 line_header_hash_voidp (const void *item
)
1727 const struct line_header
*ofs
= (const struct line_header
*) item
;
1729 return line_header_hash (ofs
);
1732 /* Equality function for line_header_hash. */
1735 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1737 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1738 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1740 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1741 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1746 /* See declaration. */
1748 dwarf2_per_bfd::dwarf2_per_bfd (bfd
*obfd
, const dwarf2_debug_sections
*names
,
1750 : can_copy (can_copy_
)
1753 names
= &dwarf2_elf_names
;
1755 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1756 locate_sections (obfd
, sec
, *names
);
1759 dwarf2_per_bfd::~dwarf2_per_bfd ()
1761 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
1762 free_cached_comp_units ();
1764 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
1765 per_cu
->imported_symtabs_free ();
1767 for (signatured_type
*sig_type
: all_type_units
)
1768 sig_type
->per_cu
.imported_symtabs_free ();
1770 /* Everything else should be on this->obstack. */
1773 /* See declaration. */
1776 dwarf2_per_bfd::free_cached_comp_units ()
1778 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
1779 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
1780 while (per_cu
!= NULL
)
1782 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
1785 *last_chain
= next_cu
;
1790 /* A helper class that calls free_cached_comp_units on
1793 class free_cached_comp_units
1797 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
1798 : m_per_objfile (per_objfile
)
1802 ~free_cached_comp_units ()
1804 m_per_objfile
->per_bfd
->free_cached_comp_units ();
1807 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
1811 dwarf2_per_objfile
*m_per_objfile
;
1814 /* Try to locate the sections we need for DWARF 2 debugging
1815 information and return true if we have enough to do something.
1816 NAMES points to the dwarf2 section names, or is NULL if the standard
1817 ELF names are used. CAN_COPY is true for formats where symbol
1818 interposition is possible and so symbol values must follow copy
1819 relocation rules. */
1822 dwarf2_has_info (struct objfile
*objfile
,
1823 const struct dwarf2_debug_sections
*names
,
1826 if (objfile
->flags
& OBJF_READNEVER
)
1829 struct dwarf2_per_objfile
*dwarf2_per_objfile
1830 = get_dwarf2_per_objfile (objfile
);
1832 if (dwarf2_per_objfile
== NULL
)
1834 /* For now, each dwarf2_per_objfile owns its own dwarf2_per_bfd (no
1836 dwarf2_per_bfd
*per_bfd
= new dwarf2_per_bfd (objfile
->obfd
, names
, can_copy
);
1838 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
, per_bfd
);
1841 return (!dwarf2_per_objfile
->per_bfd
->info
.is_virtual
1842 && dwarf2_per_objfile
->per_bfd
->info
.s
.section
!= NULL
1843 && !dwarf2_per_objfile
->per_bfd
->abbrev
.is_virtual
1844 && dwarf2_per_objfile
->per_bfd
->abbrev
.s
.section
!= NULL
);
1847 /* When loading sections, we look either for uncompressed section or for
1848 compressed section names. */
1851 section_is_p (const char *section_name
,
1852 const struct dwarf2_section_names
*names
)
1854 if (names
->normal
!= NULL
1855 && strcmp (section_name
, names
->normal
) == 0)
1857 if (names
->compressed
!= NULL
1858 && strcmp (section_name
, names
->compressed
) == 0)
1863 /* See declaration. */
1866 dwarf2_per_bfd::locate_sections (bfd
*abfd
, asection
*sectp
,
1867 const dwarf2_debug_sections
&names
)
1869 flagword aflag
= bfd_section_flags (sectp
);
1871 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1874 else if (elf_section_data (sectp
)->this_hdr
.sh_size
1875 > bfd_get_file_size (abfd
))
1877 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
1878 warning (_("Discarding section %s which has a section size (%s"
1879 ") larger than the file size [in module %s]"),
1880 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
1881 bfd_get_filename (abfd
));
1883 else if (section_is_p (sectp
->name
, &names
.info
))
1885 this->info
.s
.section
= sectp
;
1886 this->info
.size
= bfd_section_size (sectp
);
1888 else if (section_is_p (sectp
->name
, &names
.abbrev
))
1890 this->abbrev
.s
.section
= sectp
;
1891 this->abbrev
.size
= bfd_section_size (sectp
);
1893 else if (section_is_p (sectp
->name
, &names
.line
))
1895 this->line
.s
.section
= sectp
;
1896 this->line
.size
= bfd_section_size (sectp
);
1898 else if (section_is_p (sectp
->name
, &names
.loc
))
1900 this->loc
.s
.section
= sectp
;
1901 this->loc
.size
= bfd_section_size (sectp
);
1903 else if (section_is_p (sectp
->name
, &names
.loclists
))
1905 this->loclists
.s
.section
= sectp
;
1906 this->loclists
.size
= bfd_section_size (sectp
);
1908 else if (section_is_p (sectp
->name
, &names
.macinfo
))
1910 this->macinfo
.s
.section
= sectp
;
1911 this->macinfo
.size
= bfd_section_size (sectp
);
1913 else if (section_is_p (sectp
->name
, &names
.macro
))
1915 this->macro
.s
.section
= sectp
;
1916 this->macro
.size
= bfd_section_size (sectp
);
1918 else if (section_is_p (sectp
->name
, &names
.str
))
1920 this->str
.s
.section
= sectp
;
1921 this->str
.size
= bfd_section_size (sectp
);
1923 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
1925 this->str_offsets
.s
.section
= sectp
;
1926 this->str_offsets
.size
= bfd_section_size (sectp
);
1928 else if (section_is_p (sectp
->name
, &names
.line_str
))
1930 this->line_str
.s
.section
= sectp
;
1931 this->line_str
.size
= bfd_section_size (sectp
);
1933 else if (section_is_p (sectp
->name
, &names
.addr
))
1935 this->addr
.s
.section
= sectp
;
1936 this->addr
.size
= bfd_section_size (sectp
);
1938 else if (section_is_p (sectp
->name
, &names
.frame
))
1940 this->frame
.s
.section
= sectp
;
1941 this->frame
.size
= bfd_section_size (sectp
);
1943 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
1945 this->eh_frame
.s
.section
= sectp
;
1946 this->eh_frame
.size
= bfd_section_size (sectp
);
1948 else if (section_is_p (sectp
->name
, &names
.ranges
))
1950 this->ranges
.s
.section
= sectp
;
1951 this->ranges
.size
= bfd_section_size (sectp
);
1953 else if (section_is_p (sectp
->name
, &names
.rnglists
))
1955 this->rnglists
.s
.section
= sectp
;
1956 this->rnglists
.size
= bfd_section_size (sectp
);
1958 else if (section_is_p (sectp
->name
, &names
.types
))
1960 struct dwarf2_section_info type_section
;
1962 memset (&type_section
, 0, sizeof (type_section
));
1963 type_section
.s
.section
= sectp
;
1964 type_section
.size
= bfd_section_size (sectp
);
1966 this->types
.push_back (type_section
);
1968 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
1970 this->gdb_index
.s
.section
= sectp
;
1971 this->gdb_index
.size
= bfd_section_size (sectp
);
1973 else if (section_is_p (sectp
->name
, &names
.debug_names
))
1975 this->debug_names
.s
.section
= sectp
;
1976 this->debug_names
.size
= bfd_section_size (sectp
);
1978 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
1980 this->debug_aranges
.s
.section
= sectp
;
1981 this->debug_aranges
.size
= bfd_section_size (sectp
);
1984 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
1985 && bfd_section_vma (sectp
) == 0)
1986 this->has_section_at_zero
= true;
1989 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1993 dwarf2_get_section_info (struct objfile
*objfile
,
1994 enum dwarf2_section_enum sect
,
1995 asection
**sectp
, const gdb_byte
**bufp
,
1996 bfd_size_type
*sizep
)
1998 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
1999 struct dwarf2_section_info
*info
;
2001 /* We may see an objfile without any DWARF, in which case we just
2012 case DWARF2_DEBUG_FRAME
:
2013 info
= &data
->per_bfd
->frame
;
2015 case DWARF2_EH_FRAME
:
2016 info
= &data
->per_bfd
->eh_frame
;
2019 gdb_assert_not_reached ("unexpected section");
2022 info
->read (objfile
);
2024 *sectp
= info
->get_bfd_section ();
2025 *bufp
= info
->buffer
;
2026 *sizep
= info
->size
;
2029 /* A helper function to find the sections for a .dwz file. */
2032 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2034 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2036 /* Note that we only support the standard ELF names, because .dwz
2037 is ELF-only (at the time of writing). */
2038 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2040 dwz_file
->abbrev
.s
.section
= sectp
;
2041 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2043 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2045 dwz_file
->info
.s
.section
= sectp
;
2046 dwz_file
->info
.size
= bfd_section_size (sectp
);
2048 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2050 dwz_file
->str
.s
.section
= sectp
;
2051 dwz_file
->str
.size
= bfd_section_size (sectp
);
2053 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2055 dwz_file
->line
.s
.section
= sectp
;
2056 dwz_file
->line
.size
= bfd_section_size (sectp
);
2058 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2060 dwz_file
->macro
.s
.section
= sectp
;
2061 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2063 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2065 dwz_file
->gdb_index
.s
.section
= sectp
;
2066 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2068 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2070 dwz_file
->debug_names
.s
.section
= sectp
;
2071 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2075 /* See dwarf2read.h. */
2078 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2080 const char *filename
;
2081 bfd_size_type buildid_len_arg
;
2085 if (dwarf2_per_objfile
->per_bfd
->dwz_file
!= NULL
)
2086 return dwarf2_per_objfile
->per_bfd
->dwz_file
.get ();
2088 bfd_set_error (bfd_error_no_error
);
2089 gdb::unique_xmalloc_ptr
<char> data
2090 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2091 &buildid_len_arg
, &buildid
));
2094 if (bfd_get_error () == bfd_error_no_error
)
2096 error (_("could not read '.gnu_debugaltlink' section: %s"),
2097 bfd_errmsg (bfd_get_error ()));
2100 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2102 buildid_len
= (size_t) buildid_len_arg
;
2104 filename
= data
.get ();
2106 std::string abs_storage
;
2107 if (!IS_ABSOLUTE_PATH (filename
))
2109 gdb::unique_xmalloc_ptr
<char> abs
2110 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2112 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2113 filename
= abs_storage
.c_str ();
2116 /* First try the file name given in the section. If that doesn't
2117 work, try to use the build-id instead. */
2118 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
));
2119 if (dwz_bfd
!= NULL
)
2121 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2122 dwz_bfd
.reset (nullptr);
2125 if (dwz_bfd
== NULL
)
2126 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2128 if (dwz_bfd
== nullptr)
2130 gdb::unique_xmalloc_ptr
<char> alt_filename
;
2131 const char *origname
= dwarf2_per_objfile
->objfile
->original_name
;
2133 scoped_fd
fd (debuginfod_debuginfo_query (buildid
,
2140 /* File successfully retrieved from server. */
2141 dwz_bfd
= gdb_bfd_open (alt_filename
.get (), gnutarget
);
2143 if (dwz_bfd
== nullptr)
2144 warning (_("File \"%s\" from debuginfod cannot be opened as bfd"),
2145 alt_filename
.get ());
2146 else if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2147 dwz_bfd
.reset (nullptr);
2151 if (dwz_bfd
== NULL
)
2152 error (_("could not find '.gnu_debugaltlink' file for %s"),
2153 objfile_name (dwarf2_per_objfile
->objfile
));
2155 std::unique_ptr
<struct dwz_file
> result
2156 (new struct dwz_file (std::move (dwz_bfd
)));
2158 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2161 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2162 result
->dwz_bfd
.get ());
2163 dwarf2_per_objfile
->per_bfd
->dwz_file
= std::move (result
);
2164 return dwarf2_per_objfile
->per_bfd
->dwz_file
.get ();
2167 /* DWARF quick_symbols_functions support. */
2169 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2170 unique line tables, so we maintain a separate table of all .debug_line
2171 derived entries to support the sharing.
2172 All the quick functions need is the list of file names. We discard the
2173 line_header when we're done and don't need to record it here. */
2174 struct quick_file_names
2176 /* The data used to construct the hash key. */
2177 struct stmt_list_hash hash
;
2179 /* The number of entries in file_names, real_names. */
2180 unsigned int num_file_names
;
2182 /* The file names from the line table, after being run through
2184 const char **file_names
;
2186 /* The file names from the line table after being run through
2187 gdb_realpath. These are computed lazily. */
2188 const char **real_names
;
2191 /* When using the index (and thus not using psymtabs), each CU has an
2192 object of this type. This is used to hold information needed by
2193 the various "quick" methods. */
2194 struct dwarf2_per_cu_quick_data
2196 /* The file table. This can be NULL if there was no file table
2197 or it's currently not read in.
2198 NOTE: This points into dwarf2_per_objfile->per_bfd->quick_file_names_table. */
2199 struct quick_file_names
*file_names
;
2201 /* The corresponding symbol table. This is NULL if symbols for this
2202 CU have not yet been read. */
2203 struct compunit_symtab
*compunit_symtab
;
2205 /* A temporary mark bit used when iterating over all CUs in
2206 expand_symtabs_matching. */
2207 unsigned int mark
: 1;
2209 /* True if we've tried to read the file table and found there isn't one.
2210 There will be no point in trying to read it again next time. */
2211 unsigned int no_file_data
: 1;
2214 /* Utility hash function for a stmt_list_hash. */
2217 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2221 if (stmt_list_hash
->dwo_unit
!= NULL
)
2222 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2223 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2227 /* Utility equality function for a stmt_list_hash. */
2230 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2231 const struct stmt_list_hash
*rhs
)
2233 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2235 if (lhs
->dwo_unit
!= NULL
2236 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2239 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2242 /* Hash function for a quick_file_names. */
2245 hash_file_name_entry (const void *e
)
2247 const struct quick_file_names
*file_data
2248 = (const struct quick_file_names
*) e
;
2250 return hash_stmt_list_entry (&file_data
->hash
);
2253 /* Equality function for a quick_file_names. */
2256 eq_file_name_entry (const void *a
, const void *b
)
2258 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2259 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2261 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2264 /* Delete function for a quick_file_names. */
2267 delete_file_name_entry (void *e
)
2269 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2272 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2274 xfree ((void*) file_data
->file_names
[i
]);
2275 if (file_data
->real_names
)
2276 xfree ((void*) file_data
->real_names
[i
]);
2279 /* The space for the struct itself lives on the obstack, so we don't
2283 /* Create a quick_file_names hash table. */
2286 create_quick_file_names_table (unsigned int nr_initial_entries
)
2288 return htab_up (htab_create_alloc (nr_initial_entries
,
2289 hash_file_name_entry
, eq_file_name_entry
,
2290 delete_file_name_entry
, xcalloc
, xfree
));
2293 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2294 have to be created afterwards. You should call age_cached_comp_units after
2295 processing PER_CU->CU. dw2_setup must have been already called. */
2298 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2300 if (per_cu
->is_debug_types
)
2301 load_full_type_unit (per_cu
);
2303 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2305 if (per_cu
->cu
== NULL
)
2306 return; /* Dummy CU. */
2308 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2311 /* Read in the symbols for PER_CU. */
2314 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2316 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2318 /* Skip type_unit_groups, reading the type units they contain
2319 is handled elsewhere. */
2320 if (per_cu
->type_unit_group_p ())
2323 /* The destructor of dwarf2_queue_guard frees any entries left on
2324 the queue. After this point we're guaranteed to leave this function
2325 with the dwarf queue empty. */
2326 dwarf2_queue_guard
q_guard (dwarf2_per_objfile
);
2328 if (dwarf2_per_objfile
->per_bfd
->using_index
2329 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2330 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2332 queue_comp_unit (per_cu
, language_minimal
);
2333 load_cu (per_cu
, skip_partial
);
2335 /* If we just loaded a CU from a DWO, and we're working with an index
2336 that may badly handle TUs, load all the TUs in that DWO as well.
2337 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2338 if (!per_cu
->is_debug_types
2339 && per_cu
->cu
!= NULL
2340 && per_cu
->cu
->dwo_unit
!= NULL
2341 && dwarf2_per_objfile
->per_bfd
->index_table
!= NULL
2342 && dwarf2_per_objfile
->per_bfd
->index_table
->version
<= 7
2343 /* DWP files aren't supported yet. */
2344 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2345 queue_and_load_all_dwo_tus (per_cu
);
2348 process_queue (dwarf2_per_objfile
);
2350 /* Age the cache, releasing compilation units that have not
2351 been used recently. */
2352 age_cached_comp_units (dwarf2_per_objfile
);
2355 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2356 the objfile from which this CU came. Returns the resulting symbol
2359 static struct compunit_symtab
*
2360 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2362 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2364 gdb_assert (dwarf2_per_objfile
->per_bfd
->using_index
);
2365 if (!per_cu
->v
.quick
->compunit_symtab
)
2367 free_cached_comp_units
freer (dwarf2_per_objfile
);
2368 scoped_restore decrementer
= increment_reading_symtab ();
2369 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2370 process_cu_includes (dwarf2_per_objfile
);
2373 return per_cu
->v
.quick
->compunit_symtab
;
2376 /* See declaration. */
2378 dwarf2_per_cu_data
*
2379 dwarf2_per_bfd::get_cutu (int index
)
2381 if (index
>= this->all_comp_units
.size ())
2383 index
-= this->all_comp_units
.size ();
2384 gdb_assert (index
< this->all_type_units
.size ());
2385 return &this->all_type_units
[index
]->per_cu
;
2388 return this->all_comp_units
[index
];
2391 /* See declaration. */
2393 dwarf2_per_cu_data
*
2394 dwarf2_per_bfd::get_cu (int index
)
2396 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2398 return this->all_comp_units
[index
];
2401 /* See declaration. */
2404 dwarf2_per_bfd::get_tu (int index
)
2406 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2408 return this->all_type_units
[index
];
2413 dwarf2_per_cu_data
*
2414 dwarf2_per_bfd::allocate_per_cu ()
2416 dwarf2_per_cu_data
*result
= OBSTACK_ZALLOC (&obstack
, dwarf2_per_cu_data
);
2417 result
->index
= m_num_psymtabs
++;
2424 dwarf2_per_bfd::allocate_signatured_type ()
2426 signatured_type
*result
= OBSTACK_ZALLOC (&obstack
, signatured_type
);
2427 result
->per_cu
.index
= m_num_psymtabs
++;
2431 /* Return a new dwarf2_per_cu_data allocated on the dwarf2_per_objfile
2432 obstack, and constructed with the specified field values. */
2434 static dwarf2_per_cu_data
*
2435 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2436 struct dwarf2_section_info
*section
,
2438 sect_offset sect_off
, ULONGEST length
)
2440 dwarf2_per_cu_data
*the_cu
= dwarf2_per_objfile
->per_bfd
->allocate_per_cu ();
2441 the_cu
->sect_off
= sect_off
;
2442 the_cu
->length
= length
;
2443 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2444 the_cu
->section
= section
;
2445 the_cu
->v
.quick
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
2446 struct dwarf2_per_cu_quick_data
);
2447 the_cu
->is_dwz
= is_dwz
;
2451 /* A helper for create_cus_from_index that handles a given list of
2455 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2456 const gdb_byte
*cu_list
, offset_type n_elements
,
2457 struct dwarf2_section_info
*section
,
2460 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2462 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2464 sect_offset sect_off
2465 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2466 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2469 dwarf2_per_cu_data
*per_cu
2470 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2472 dwarf2_per_objfile
->per_bfd
->all_comp_units
.push_back (per_cu
);
2476 /* Read the CU list from the mapped index, and use it to create all
2477 the CU objects for this objfile. */
2480 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2481 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2482 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2484 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_comp_units
.empty ());
2485 dwarf2_per_objfile
->per_bfd
->all_comp_units
.reserve
2486 ((cu_list_elements
+ dwz_elements
) / 2);
2488 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
2489 &dwarf2_per_objfile
->per_bfd
->info
, 0);
2491 if (dwz_elements
== 0)
2494 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
2495 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
2499 /* Create the signatured type hash table from the index. */
2502 create_signatured_type_table_from_index
2503 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2504 struct dwarf2_section_info
*section
,
2505 const gdb_byte
*bytes
,
2506 offset_type elements
)
2508 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ());
2509 dwarf2_per_objfile
->per_bfd
->all_type_units
.reserve (elements
/ 3);
2511 htab_up sig_types_hash
= allocate_signatured_type_table ();
2513 for (offset_type i
= 0; i
< elements
; i
+= 3)
2515 struct signatured_type
*sig_type
;
2518 cu_offset type_offset_in_tu
;
2520 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2521 sect_offset sect_off
2522 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2524 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2526 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2529 sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
2530 sig_type
->signature
= signature
;
2531 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2532 sig_type
->per_cu
.is_debug_types
= 1;
2533 sig_type
->per_cu
.section
= section
;
2534 sig_type
->per_cu
.sect_off
= sect_off
;
2535 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2536 sig_type
->per_cu
.v
.quick
2537 = OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
2538 struct dwarf2_per_cu_quick_data
);
2540 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2543 dwarf2_per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
2546 dwarf2_per_objfile
->per_bfd
->signatured_types
= std::move (sig_types_hash
);
2549 /* Create the signatured type hash table from .debug_names. */
2552 create_signatured_type_table_from_debug_names
2553 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2554 const mapped_debug_names
&map
,
2555 struct dwarf2_section_info
*section
,
2556 struct dwarf2_section_info
*abbrev_section
)
2558 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2560 section
->read (objfile
);
2561 abbrev_section
->read (objfile
);
2563 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ());
2564 dwarf2_per_objfile
->per_bfd
->all_type_units
.reserve (map
.tu_count
);
2566 htab_up sig_types_hash
= allocate_signatured_type_table ();
2568 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2570 struct signatured_type
*sig_type
;
2573 sect_offset sect_off
2574 = (sect_offset
) (extract_unsigned_integer
2575 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2577 map
.dwarf5_byte_order
));
2579 comp_unit_head cu_header
;
2580 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
2582 section
->buffer
+ to_underlying (sect_off
),
2585 sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
2586 sig_type
->signature
= cu_header
.signature
;
2587 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2588 sig_type
->per_cu
.is_debug_types
= 1;
2589 sig_type
->per_cu
.section
= section
;
2590 sig_type
->per_cu
.sect_off
= sect_off
;
2591 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2592 sig_type
->per_cu
.v
.quick
2593 = OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
2594 struct dwarf2_per_cu_quick_data
);
2596 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2599 dwarf2_per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
2602 dwarf2_per_objfile
->per_bfd
->signatured_types
= std::move (sig_types_hash
);
2605 /* Read the address map data from the mapped index, and use it to
2606 populate the objfile's psymtabs_addrmap. */
2609 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2610 struct mapped_index
*index
)
2612 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2613 struct gdbarch
*gdbarch
= objfile
->arch ();
2614 const gdb_byte
*iter
, *end
;
2615 struct addrmap
*mutable_map
;
2618 auto_obstack temp_obstack
;
2620 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2622 iter
= index
->address_table
.data ();
2623 end
= iter
+ index
->address_table
.size ();
2625 baseaddr
= objfile
->text_section_offset ();
2629 ULONGEST hi
, lo
, cu_index
;
2630 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2632 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2634 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2639 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2640 hex_string (lo
), hex_string (hi
));
2644 if (cu_index
>= dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ())
2646 complaint (_(".gdb_index address table has invalid CU number %u"),
2647 (unsigned) cu_index
);
2651 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2652 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2653 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2654 dwarf2_per_objfile
->per_bfd
->get_cu (cu_index
));
2657 objfile
->partial_symtabs
->psymtabs_addrmap
2658 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2661 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2662 populate the objfile's psymtabs_addrmap. */
2665 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2666 struct dwarf2_section_info
*section
)
2668 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2669 bfd
*abfd
= objfile
->obfd
;
2670 struct gdbarch
*gdbarch
= objfile
->arch ();
2671 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2673 auto_obstack temp_obstack
;
2674 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2676 std::unordered_map
<sect_offset
,
2677 dwarf2_per_cu_data
*,
2678 gdb::hash_enum
<sect_offset
>>
2679 debug_info_offset_to_per_cu
;
2680 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
2682 const auto insertpair
2683 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2684 if (!insertpair
.second
)
2686 warning (_("Section .debug_aranges in %s has duplicate "
2687 "debug_info_offset %s, ignoring .debug_aranges."),
2688 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2693 section
->read (objfile
);
2695 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2697 const gdb_byte
*addr
= section
->buffer
;
2699 while (addr
< section
->buffer
+ section
->size
)
2701 const gdb_byte
*const entry_addr
= addr
;
2702 unsigned int bytes_read
;
2704 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2708 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2709 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2710 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2711 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2713 warning (_("Section .debug_aranges in %s entry at offset %s "
2714 "length %s exceeds section length %s, "
2715 "ignoring .debug_aranges."),
2716 objfile_name (objfile
),
2717 plongest (entry_addr
- section
->buffer
),
2718 plongest (bytes_read
+ entry_length
),
2719 pulongest (section
->size
));
2723 /* The version number. */
2724 const uint16_t version
= read_2_bytes (abfd
, addr
);
2728 warning (_("Section .debug_aranges in %s entry at offset %s "
2729 "has unsupported version %d, ignoring .debug_aranges."),
2730 objfile_name (objfile
),
2731 plongest (entry_addr
- section
->buffer
), version
);
2735 const uint64_t debug_info_offset
2736 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2737 addr
+= offset_size
;
2738 const auto per_cu_it
2739 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2740 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2742 warning (_("Section .debug_aranges in %s entry at offset %s "
2743 "debug_info_offset %s does not exists, "
2744 "ignoring .debug_aranges."),
2745 objfile_name (objfile
),
2746 plongest (entry_addr
- section
->buffer
),
2747 pulongest (debug_info_offset
));
2750 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2752 const uint8_t address_size
= *addr
++;
2753 if (address_size
< 1 || address_size
> 8)
2755 warning (_("Section .debug_aranges in %s entry at offset %s "
2756 "address_size %u is invalid, ignoring .debug_aranges."),
2757 objfile_name (objfile
),
2758 plongest (entry_addr
- section
->buffer
), address_size
);
2762 const uint8_t segment_selector_size
= *addr
++;
2763 if (segment_selector_size
!= 0)
2765 warning (_("Section .debug_aranges in %s entry at offset %s "
2766 "segment_selector_size %u is not supported, "
2767 "ignoring .debug_aranges."),
2768 objfile_name (objfile
),
2769 plongest (entry_addr
- section
->buffer
),
2770 segment_selector_size
);
2774 /* Must pad to an alignment boundary that is twice the address
2775 size. It is undocumented by the DWARF standard but GCC does
2777 for (size_t padding
= ((-(addr
- section
->buffer
))
2778 & (2 * address_size
- 1));
2779 padding
> 0; padding
--)
2782 warning (_("Section .debug_aranges in %s entry at offset %s "
2783 "padding is not zero, ignoring .debug_aranges."),
2784 objfile_name (objfile
),
2785 plongest (entry_addr
- section
->buffer
));
2791 if (addr
+ 2 * address_size
> entry_end
)
2793 warning (_("Section .debug_aranges in %s entry at offset %s "
2794 "address list is not properly terminated, "
2795 "ignoring .debug_aranges."),
2796 objfile_name (objfile
),
2797 plongest (entry_addr
- section
->buffer
));
2800 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
2802 addr
+= address_size
;
2803 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
2805 addr
+= address_size
;
2806 if (start
== 0 && length
== 0)
2808 if (start
== 0 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
2810 /* Symbol was eliminated due to a COMDAT group. */
2813 ULONGEST end
= start
+ length
;
2814 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
2816 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
2818 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
2822 objfile
->partial_symtabs
->psymtabs_addrmap
2823 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2826 /* Find a slot in the mapped index INDEX for the object named NAME.
2827 If NAME is found, set *VEC_OUT to point to the CU vector in the
2828 constant pool and return true. If NAME cannot be found, return
2832 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2833 offset_type
**vec_out
)
2836 offset_type slot
, step
;
2837 int (*cmp
) (const char *, const char *);
2839 gdb::unique_xmalloc_ptr
<char> without_params
;
2840 if (current_language
->la_language
== language_cplus
2841 || current_language
->la_language
== language_fortran
2842 || current_language
->la_language
== language_d
)
2844 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2847 if (strchr (name
, '(') != NULL
)
2849 without_params
= cp_remove_params (name
);
2851 if (without_params
!= NULL
)
2852 name
= without_params
.get ();
2856 /* Index version 4 did not support case insensitive searches. But the
2857 indices for case insensitive languages are built in lowercase, therefore
2858 simulate our NAME being searched is also lowercased. */
2859 hash
= mapped_index_string_hash ((index
->version
== 4
2860 && case_sensitivity
== case_sensitive_off
2861 ? 5 : index
->version
),
2864 slot
= hash
& (index
->symbol_table
.size () - 1);
2865 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
2866 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2872 const auto &bucket
= index
->symbol_table
[slot
];
2873 if (bucket
.name
== 0 && bucket
.vec
== 0)
2876 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
2877 if (!cmp (name
, str
))
2879 *vec_out
= (offset_type
*) (index
->constant_pool
2880 + MAYBE_SWAP (bucket
.vec
));
2884 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
2888 /* A helper function that reads the .gdb_index from BUFFER and fills
2889 in MAP. FILENAME is the name of the file containing the data;
2890 it is used for error reporting. DEPRECATED_OK is true if it is
2891 ok to use deprecated sections.
2893 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2894 out parameters that are filled in with information about the CU and
2895 TU lists in the section.
2897 Returns true if all went well, false otherwise. */
2900 read_gdb_index_from_buffer (const char *filename
,
2902 gdb::array_view
<const gdb_byte
> buffer
,
2903 struct mapped_index
*map
,
2904 const gdb_byte
**cu_list
,
2905 offset_type
*cu_list_elements
,
2906 const gdb_byte
**types_list
,
2907 offset_type
*types_list_elements
)
2909 const gdb_byte
*addr
= &buffer
[0];
2911 /* Version check. */
2912 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
2913 /* Versions earlier than 3 emitted every copy of a psymbol. This
2914 causes the index to behave very poorly for certain requests. Version 3
2915 contained incomplete addrmap. So, it seems better to just ignore such
2919 static int warning_printed
= 0;
2920 if (!warning_printed
)
2922 warning (_("Skipping obsolete .gdb_index section in %s."),
2924 warning_printed
= 1;
2928 /* Index version 4 uses a different hash function than index version
2931 Versions earlier than 6 did not emit psymbols for inlined
2932 functions. Using these files will cause GDB not to be able to
2933 set breakpoints on inlined functions by name, so we ignore these
2934 indices unless the user has done
2935 "set use-deprecated-index-sections on". */
2936 if (version
< 6 && !deprecated_ok
)
2938 static int warning_printed
= 0;
2939 if (!warning_printed
)
2942 Skipping deprecated .gdb_index section in %s.\n\
2943 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2944 to use the section anyway."),
2946 warning_printed
= 1;
2950 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2951 of the TU (for symbols coming from TUs),
2952 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
2953 Plus gold-generated indices can have duplicate entries for global symbols,
2954 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
2955 These are just performance bugs, and we can't distinguish gdb-generated
2956 indices from gold-generated ones, so issue no warning here. */
2958 /* Indexes with higher version than the one supported by GDB may be no
2959 longer backward compatible. */
2963 map
->version
= version
;
2965 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2968 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2969 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2973 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2974 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2975 - MAYBE_SWAP (metadata
[i
]))
2979 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2980 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2982 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
2985 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2986 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2988 = gdb::array_view
<mapped_index::symbol_table_slot
>
2989 ((mapped_index::symbol_table_slot
*) symbol_table
,
2990 (mapped_index::symbol_table_slot
*) symbol_table_end
);
2993 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
2998 /* Callback types for dwarf2_read_gdb_index. */
3000 typedef gdb::function_view
3001 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_bfd
*)>
3002 get_gdb_index_contents_ftype
;
3003 typedef gdb::function_view
3004 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3005 get_gdb_index_contents_dwz_ftype
;
3007 /* Read .gdb_index. If everything went ok, initialize the "quick"
3008 elements of all the CUs and return 1. Otherwise, return 0. */
3011 dwarf2_read_gdb_index
3012 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3013 get_gdb_index_contents_ftype get_gdb_index_contents
,
3014 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3016 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3017 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3018 struct dwz_file
*dwz
;
3019 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3021 gdb::array_view
<const gdb_byte
> main_index_contents
3022 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
->per_bfd
);
3024 if (main_index_contents
.empty ())
3027 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3028 if (!read_gdb_index_from_buffer (objfile_name (objfile
),
3029 use_deprecated_index_sections
,
3030 main_index_contents
, map
.get (), &cu_list
,
3031 &cu_list_elements
, &types_list
,
3032 &types_list_elements
))
3035 /* Don't use the index if it's empty. */
3036 if (map
->symbol_table
.empty ())
3039 /* If there is a .dwz file, read it so we can get its CU list as
3041 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3044 struct mapped_index dwz_map
;
3045 const gdb_byte
*dwz_types_ignore
;
3046 offset_type dwz_types_elements_ignore
;
3048 gdb::array_view
<const gdb_byte
> dwz_index_content
3049 = get_gdb_index_contents_dwz (objfile
, dwz
);
3051 if (dwz_index_content
.empty ())
3054 if (!read_gdb_index_from_buffer (bfd_get_filename (dwz
->dwz_bfd
.get ()),
3055 1, dwz_index_content
, &dwz_map
,
3056 &dwz_list
, &dwz_list_elements
,
3058 &dwz_types_elements_ignore
))
3060 warning (_("could not read '.gdb_index' section from %s; skipping"),
3061 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3066 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3067 dwz_list
, dwz_list_elements
);
3069 if (types_list_elements
)
3071 /* We can only handle a single .debug_types when we have an
3073 if (dwarf2_per_objfile
->per_bfd
->types
.size () != 1)
3076 dwarf2_section_info
*section
= &dwarf2_per_objfile
->per_bfd
->types
[0];
3078 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3079 types_list
, types_list_elements
);
3082 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3084 dwarf2_per_objfile
->per_bfd
->index_table
= std::move (map
);
3085 dwarf2_per_objfile
->per_bfd
->using_index
= 1;
3086 dwarf2_per_objfile
->per_bfd
->quick_file_names_table
=
3087 create_quick_file_names_table (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ());
3092 /* die_reader_func for dw2_get_file_names. */
3095 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3096 const gdb_byte
*info_ptr
,
3097 struct die_info
*comp_unit_die
)
3099 struct dwarf2_cu
*cu
= reader
->cu
;
3100 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3101 struct dwarf2_per_objfile
*dwarf2_per_objfile
3102 = cu
->per_cu
->dwarf2_per_objfile
;
3103 struct dwarf2_per_cu_data
*lh_cu
;
3104 struct attribute
*attr
;
3106 struct quick_file_names
*qfn
;
3108 gdb_assert (! this_cu
->is_debug_types
);
3110 /* Our callers never want to match partial units -- instead they
3111 will match the enclosing full CU. */
3112 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3114 this_cu
->v
.quick
->no_file_data
= 1;
3122 sect_offset line_offset
{};
3124 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3125 if (attr
!= nullptr)
3127 struct quick_file_names find_entry
;
3129 line_offset
= (sect_offset
) DW_UNSND (attr
);
3131 /* We may have already read in this line header (TU line header sharing).
3132 If we have we're done. */
3133 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3134 find_entry
.hash
.line_sect_off
= line_offset
;
3135 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->quick_file_names_table
.get (),
3136 &find_entry
, INSERT
);
3139 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3143 lh
= dwarf_decode_line_header (line_offset
, cu
);
3147 lh_cu
->v
.quick
->no_file_data
= 1;
3151 qfn
= XOBNEW (&dwarf2_per_objfile
->per_bfd
->obstack
, struct quick_file_names
);
3152 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3153 qfn
->hash
.line_sect_off
= line_offset
;
3154 gdb_assert (slot
!= NULL
);
3157 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3160 if (strcmp (fnd
.name
, "<unknown>") != 0)
3163 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3165 XOBNEWVEC (&dwarf2_per_objfile
->per_bfd
->obstack
, const char *,
3166 qfn
->num_file_names
);
3168 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3169 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3170 qfn
->file_names
[i
+ offset
] = lh
->file_full_name (i
+ 1,
3171 fnd
.comp_dir
).release ();
3172 qfn
->real_names
= NULL
;
3174 lh_cu
->v
.quick
->file_names
= qfn
;
3177 /* A helper for the "quick" functions which attempts to read the line
3178 table for THIS_CU. */
3180 static struct quick_file_names
*
3181 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3183 /* This should never be called for TUs. */
3184 gdb_assert (! this_cu
->is_debug_types
);
3185 /* Nor type unit groups. */
3186 gdb_assert (! this_cu
->type_unit_group_p ());
3188 if (this_cu
->v
.quick
->file_names
!= NULL
)
3189 return this_cu
->v
.quick
->file_names
;
3190 /* If we know there is no line data, no point in looking again. */
3191 if (this_cu
->v
.quick
->no_file_data
)
3194 cutu_reader
reader (this_cu
);
3195 if (!reader
.dummy_p
)
3196 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3198 if (this_cu
->v
.quick
->no_file_data
)
3200 return this_cu
->v
.quick
->file_names
;
3203 /* A helper for the "quick" functions which computes and caches the
3204 real path for a given file name from the line table. */
3207 dw2_get_real_path (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3208 struct quick_file_names
*qfn
, int index
)
3210 if (qfn
->real_names
== NULL
)
3211 qfn
->real_names
= OBSTACK_CALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
3212 qfn
->num_file_names
, const char *);
3214 if (qfn
->real_names
[index
] == NULL
)
3215 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3217 return qfn
->real_names
[index
];
3220 static struct symtab
*
3221 dw2_find_last_source_symtab (struct objfile
*objfile
)
3223 struct dwarf2_per_objfile
*dwarf2_per_objfile
3224 = get_dwarf2_per_objfile (objfile
);
3225 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->per_bfd
->all_comp_units
.back ();
3226 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3231 return compunit_primary_filetab (cust
);
3234 /* Traversal function for dw2_forget_cached_source_info. */
3237 dw2_free_cached_file_names (void **slot
, void *info
)
3239 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3241 if (file_data
->real_names
)
3245 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3247 xfree ((void*) file_data
->real_names
[i
]);
3248 file_data
->real_names
[i
] = NULL
;
3256 dw2_forget_cached_source_info (struct objfile
*objfile
)
3258 struct dwarf2_per_objfile
*dwarf2_per_objfile
3259 = get_dwarf2_per_objfile (objfile
);
3261 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->quick_file_names_table
.get (),
3262 dw2_free_cached_file_names
, NULL
);
3265 /* Helper function for dw2_map_symtabs_matching_filename that expands
3266 the symtabs and calls the iterator. */
3269 dw2_map_expand_apply (struct objfile
*objfile
,
3270 struct dwarf2_per_cu_data
*per_cu
,
3271 const char *name
, const char *real_path
,
3272 gdb::function_view
<bool (symtab
*)> callback
)
3274 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3276 /* Don't visit already-expanded CUs. */
3277 if (per_cu
->v
.quick
->compunit_symtab
)
3280 /* This may expand more than one symtab, and we want to iterate over
3282 dw2_instantiate_symtab (per_cu
, false);
3284 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3285 last_made
, callback
);
3288 /* Implementation of the map_symtabs_matching_filename method. */
3291 dw2_map_symtabs_matching_filename
3292 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3293 gdb::function_view
<bool (symtab
*)> callback
)
3295 const char *name_basename
= lbasename (name
);
3296 struct dwarf2_per_objfile
*dwarf2_per_objfile
3297 = get_dwarf2_per_objfile (objfile
);
3299 /* The rule is CUs specify all the files, including those used by
3300 any TU, so there's no need to scan TUs here. */
3302 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
3304 /* We only need to look at symtabs not already expanded. */
3305 if (per_cu
->v
.quick
->compunit_symtab
)
3308 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3309 if (file_data
== NULL
)
3312 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3314 const char *this_name
= file_data
->file_names
[j
];
3315 const char *this_real_name
;
3317 if (compare_filenames_for_search (this_name
, name
))
3319 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3325 /* Before we invoke realpath, which can get expensive when many
3326 files are involved, do a quick comparison of the basenames. */
3327 if (! basenames_may_differ
3328 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3331 this_real_name
= dw2_get_real_path (dwarf2_per_objfile
,
3333 if (compare_filenames_for_search (this_real_name
, name
))
3335 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3341 if (real_path
!= NULL
)
3343 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3344 gdb_assert (IS_ABSOLUTE_PATH (name
));
3345 if (this_real_name
!= NULL
3346 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3348 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3360 /* Struct used to manage iterating over all CUs looking for a symbol. */
3362 struct dw2_symtab_iterator
3364 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3365 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3366 /* If set, only look for symbols that match that block. Valid values are
3367 GLOBAL_BLOCK and STATIC_BLOCK. */
3368 gdb::optional
<block_enum
> block_index
;
3369 /* The kind of symbol we're looking for. */
3371 /* The list of CUs from the index entry of the symbol,
3372 or NULL if not found. */
3374 /* The next element in VEC to look at. */
3376 /* The number of elements in VEC, or zero if there is no match. */
3378 /* Have we seen a global version of the symbol?
3379 If so we can ignore all further global instances.
3380 This is to work around gold/15646, inefficient gold-generated
3385 /* Initialize the index symtab iterator ITER. */
3388 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3389 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3390 gdb::optional
<block_enum
> block_index
,
3394 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3395 iter
->block_index
= block_index
;
3396 iter
->domain
= domain
;
3398 iter
->global_seen
= 0;
3400 mapped_index
*index
= dwarf2_per_objfile
->per_bfd
->index_table
.get ();
3402 /* index is NULL if OBJF_READNOW. */
3403 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3404 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3412 /* Return the next matching CU or NULL if there are no more. */
3414 static struct dwarf2_per_cu_data
*
3415 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3417 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3419 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3421 offset_type cu_index_and_attrs
=
3422 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3423 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3424 gdb_index_symbol_kind symbol_kind
=
3425 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3426 /* Only check the symbol attributes if they're present.
3427 Indices prior to version 7 don't record them,
3428 and indices >= 7 may elide them for certain symbols
3429 (gold does this). */
3431 (dwarf2_per_objfile
->per_bfd
->index_table
->version
>= 7
3432 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3434 /* Don't crash on bad data. */
3435 if (cu_index
>= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
3436 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()))
3438 complaint (_(".gdb_index entry has bad CU index"
3440 objfile_name (dwarf2_per_objfile
->objfile
));
3444 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (cu_index
);
3446 /* Skip if already read in. */
3447 if (per_cu
->v
.quick
->compunit_symtab
)
3450 /* Check static vs global. */
3453 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3455 if (iter
->block_index
.has_value ())
3457 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3459 if (is_static
!= want_static
)
3463 /* Work around gold/15646. */
3464 if (!is_static
&& iter
->global_seen
)
3467 iter
->global_seen
= 1;
3470 /* Only check the symbol's kind if it has one. */
3473 switch (iter
->domain
)
3476 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3477 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3478 /* Some types are also in VAR_DOMAIN. */
3479 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3483 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3487 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3491 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3506 static struct compunit_symtab
*
3507 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3508 const char *name
, domain_enum domain
)
3510 struct compunit_symtab
*stab_best
= NULL
;
3511 struct dwarf2_per_objfile
*dwarf2_per_objfile
3512 = get_dwarf2_per_objfile (objfile
);
3514 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3516 struct dw2_symtab_iterator iter
;
3517 struct dwarf2_per_cu_data
*per_cu
;
3519 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
3521 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3523 struct symbol
*sym
, *with_opaque
= NULL
;
3524 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
3525 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3526 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3528 sym
= block_find_symbol (block
, name
, domain
,
3529 block_find_non_opaque_type_preferred
,
3532 /* Some caution must be observed with overloaded functions
3533 and methods, since the index will not contain any overload
3534 information (but NAME might contain it). */
3537 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3539 if (with_opaque
!= NULL
3540 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3543 /* Keep looking through other CUs. */
3550 dw2_print_stats (struct objfile
*objfile
)
3552 struct dwarf2_per_objfile
*dwarf2_per_objfile
3553 = get_dwarf2_per_objfile (objfile
);
3554 int total
= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
3555 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
3558 for (int i
= 0; i
< total
; ++i
)
3560 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (i
);
3562 if (!per_cu
->v
.quick
->compunit_symtab
)
3565 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3566 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3569 /* This dumps minimal information about the index.
3570 It is called via "mt print objfiles".
3571 One use is to verify .gdb_index has been loaded by the
3572 gdb.dwarf2/gdb-index.exp testcase. */
3575 dw2_dump (struct objfile
*objfile
)
3577 struct dwarf2_per_objfile
*dwarf2_per_objfile
3578 = get_dwarf2_per_objfile (objfile
);
3580 gdb_assert (dwarf2_per_objfile
->per_bfd
->using_index
);
3581 printf_filtered (".gdb_index:");
3582 if (dwarf2_per_objfile
->per_bfd
->index_table
!= NULL
)
3584 printf_filtered (" version %d\n",
3585 dwarf2_per_objfile
->per_bfd
->index_table
->version
);
3588 printf_filtered (" faked for \"readnow\"\n");
3589 printf_filtered ("\n");
3593 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3594 const char *func_name
)
3596 struct dwarf2_per_objfile
*dwarf2_per_objfile
3597 = get_dwarf2_per_objfile (objfile
);
3599 struct dw2_symtab_iterator iter
;
3600 struct dwarf2_per_cu_data
*per_cu
;
3602 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
3604 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3605 dw2_instantiate_symtab (per_cu
, false);
3610 dw2_expand_all_symtabs (struct objfile
*objfile
)
3612 struct dwarf2_per_objfile
*dwarf2_per_objfile
3613 = get_dwarf2_per_objfile (objfile
);
3614 int total_units
= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
3615 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
3617 for (int i
= 0; i
< total_units
; ++i
)
3619 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (i
);
3621 /* We don't want to directly expand a partial CU, because if we
3622 read it with the wrong language, then assertion failures can
3623 be triggered later on. See PR symtab/23010. So, tell
3624 dw2_instantiate_symtab to skip partial CUs -- any important
3625 partial CU will be read via DW_TAG_imported_unit anyway. */
3626 dw2_instantiate_symtab (per_cu
, true);
3631 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3632 const char *fullname
)
3634 struct dwarf2_per_objfile
*dwarf2_per_objfile
3635 = get_dwarf2_per_objfile (objfile
);
3637 /* We don't need to consider type units here.
3638 This is only called for examining code, e.g. expand_line_sal.
3639 There can be an order of magnitude (or more) more type units
3640 than comp units, and we avoid them if we can. */
3642 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
3644 /* We only need to look at symtabs not already expanded. */
3645 if (per_cu
->v
.quick
->compunit_symtab
)
3648 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3649 if (file_data
== NULL
)
3652 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3654 const char *this_fullname
= file_data
->file_names
[j
];
3656 if (filename_cmp (this_fullname
, fullname
) == 0)
3658 dw2_instantiate_symtab (per_cu
, false);
3666 dw2_expand_symtabs_matching_symbol
3667 (mapped_index_base
&index
,
3668 const lookup_name_info
&lookup_name_in
,
3669 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3670 enum search_domain kind
,
3671 gdb::function_view
<bool (offset_type
)> match_callback
);
3674 dw2_expand_symtabs_matching_one
3675 (struct dwarf2_per_cu_data
*per_cu
,
3676 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3677 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
);
3680 dw2_map_matching_symbols
3681 (struct objfile
*objfile
,
3682 const lookup_name_info
&name
, domain_enum domain
,
3684 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3685 symbol_compare_ftype
*ordered_compare
)
3688 struct dwarf2_per_objfile
*dwarf2_per_objfile
3689 = get_dwarf2_per_objfile (objfile
);
3691 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
3693 if (dwarf2_per_objfile
->per_bfd
->index_table
!= nullptr)
3695 /* Ada currently doesn't support .gdb_index (see PR24713). We can get
3696 here though if the current language is Ada for a non-Ada objfile
3698 mapped_index
&index
= *dwarf2_per_objfile
->per_bfd
->index_table
;
3700 const char *match_name
= name
.ada ().lookup_name ().c_str ();
3701 auto matcher
= [&] (const char *symname
)
3703 if (ordered_compare
== nullptr)
3705 return ordered_compare (symname
, match_name
) == 0;
3708 dw2_expand_symtabs_matching_symbol (index
, name
, matcher
, ALL_DOMAIN
,
3709 [&] (offset_type namei
)
3711 struct dw2_symtab_iterator iter
;
3712 struct dwarf2_per_cu_data
*per_cu
;
3714 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_kind
, domain
,
3716 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3717 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
3723 /* We have -readnow: no .gdb_index, but no partial symtabs either. So,
3724 proceed assuming all symtabs have been read in. */
3727 for (compunit_symtab
*cust
: objfile
->compunits ())
3729 const struct block
*block
;
3733 block
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
3734 if (!iterate_over_symbols_terminated (block
, name
,
3740 /* Starting from a search name, return the string that finds the upper
3741 bound of all strings that start with SEARCH_NAME in a sorted name
3742 list. Returns the empty string to indicate that the upper bound is
3743 the end of the list. */
3746 make_sort_after_prefix_name (const char *search_name
)
3748 /* When looking to complete "func", we find the upper bound of all
3749 symbols that start with "func" by looking for where we'd insert
3750 the closest string that would follow "func" in lexicographical
3751 order. Usually, that's "func"-with-last-character-incremented,
3752 i.e. "fund". Mind non-ASCII characters, though. Usually those
3753 will be UTF-8 multi-byte sequences, but we can't be certain.
3754 Especially mind the 0xff character, which is a valid character in
3755 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3756 rule out compilers allowing it in identifiers. Note that
3757 conveniently, strcmp/strcasecmp are specified to compare
3758 characters interpreted as unsigned char. So what we do is treat
3759 the whole string as a base 256 number composed of a sequence of
3760 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3761 to 0, and carries 1 to the following more-significant position.
3762 If the very first character in SEARCH_NAME ends up incremented
3763 and carries/overflows, then the upper bound is the end of the
3764 list. The string after the empty string is also the empty
3767 Some examples of this operation:
3769 SEARCH_NAME => "+1" RESULT
3773 "\xff" "a" "\xff" => "\xff" "b"
3778 Then, with these symbols for example:
3784 completing "func" looks for symbols between "func" and
3785 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
3786 which finds "func" and "func1", but not "fund".
3790 funcÿ (Latin1 'ÿ' [0xff])
3794 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
3795 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
3799 ÿÿ (Latin1 'ÿ' [0xff])
3802 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
3803 the end of the list.
3805 std::string after
= search_name
;
3806 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
3808 if (!after
.empty ())
3809 after
.back () = (unsigned char) after
.back () + 1;
3813 /* See declaration. */
3815 std::pair
<std::vector
<name_component
>::const_iterator
,
3816 std::vector
<name_component
>::const_iterator
>
3817 mapped_index_base::find_name_components_bounds
3818 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
3821 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3823 const char *lang_name
3824 = lookup_name_without_params
.language_lookup_name (lang
);
3826 /* Comparison function object for lower_bound that matches against a
3827 given symbol name. */
3828 auto lookup_compare_lower
= [&] (const name_component
&elem
,
3831 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3832 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3833 return name_cmp (elem_name
, name
) < 0;
3836 /* Comparison function object for upper_bound that matches against a
3837 given symbol name. */
3838 auto lookup_compare_upper
= [&] (const char *name
,
3839 const name_component
&elem
)
3841 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3842 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3843 return name_cmp (name
, elem_name
) < 0;
3846 auto begin
= this->name_components
.begin ();
3847 auto end
= this->name_components
.end ();
3849 /* Find the lower bound. */
3852 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
3855 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
3858 /* Find the upper bound. */
3861 if (lookup_name_without_params
.completion_mode ())
3863 /* In completion mode, we want UPPER to point past all
3864 symbols names that have the same prefix. I.e., with
3865 these symbols, and completing "func":
3867 function << lower bound
3869 other_function << upper bound
3871 We find the upper bound by looking for the insertion
3872 point of "func"-with-last-character-incremented,
3874 std::string after
= make_sort_after_prefix_name (lang_name
);
3877 return std::lower_bound (lower
, end
, after
.c_str (),
3878 lookup_compare_lower
);
3881 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
3884 return {lower
, upper
};
3887 /* See declaration. */
3890 mapped_index_base::build_name_components ()
3892 if (!this->name_components
.empty ())
3895 this->name_components_casing
= case_sensitivity
;
3897 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3899 /* The code below only knows how to break apart components of C++
3900 symbol names (and other languages that use '::' as
3901 namespace/module separator) and Ada symbol names. */
3902 auto count
= this->symbol_name_count ();
3903 for (offset_type idx
= 0; idx
< count
; idx
++)
3905 if (this->symbol_name_slot_invalid (idx
))
3908 const char *name
= this->symbol_name_at (idx
);
3910 /* Add each name component to the name component table. */
3911 unsigned int previous_len
= 0;
3913 if (strstr (name
, "::") != nullptr)
3915 for (unsigned int current_len
= cp_find_first_component (name
);
3916 name
[current_len
] != '\0';
3917 current_len
+= cp_find_first_component (name
+ current_len
))
3919 gdb_assert (name
[current_len
] == ':');
3920 this->name_components
.push_back ({previous_len
, idx
});
3921 /* Skip the '::'. */
3923 previous_len
= current_len
;
3928 /* Handle the Ada encoded (aka mangled) form here. */
3929 for (const char *iter
= strstr (name
, "__");
3931 iter
= strstr (iter
, "__"))
3933 this->name_components
.push_back ({previous_len
, idx
});
3935 previous_len
= iter
- name
;
3939 this->name_components
.push_back ({previous_len
, idx
});
3942 /* Sort name_components elements by name. */
3943 auto name_comp_compare
= [&] (const name_component
&left
,
3944 const name_component
&right
)
3946 const char *left_qualified
= this->symbol_name_at (left
.idx
);
3947 const char *right_qualified
= this->symbol_name_at (right
.idx
);
3949 const char *left_name
= left_qualified
+ left
.name_offset
;
3950 const char *right_name
= right_qualified
+ right
.name_offset
;
3952 return name_cmp (left_name
, right_name
) < 0;
3955 std::sort (this->name_components
.begin (),
3956 this->name_components
.end (),
3960 /* Helper for dw2_expand_symtabs_matching that works with a
3961 mapped_index_base instead of the containing objfile. This is split
3962 to a separate function in order to be able to unit test the
3963 name_components matching using a mock mapped_index_base. For each
3964 symbol name that matches, calls MATCH_CALLBACK, passing it the
3965 symbol's index in the mapped_index_base symbol table. */
3968 dw2_expand_symtabs_matching_symbol
3969 (mapped_index_base
&index
,
3970 const lookup_name_info
&lookup_name_in
,
3971 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3972 enum search_domain kind
,
3973 gdb::function_view
<bool (offset_type
)> match_callback
)
3975 lookup_name_info lookup_name_without_params
3976 = lookup_name_in
.make_ignore_params ();
3978 /* Build the symbol name component sorted vector, if we haven't
3980 index
.build_name_components ();
3982 /* The same symbol may appear more than once in the range though.
3983 E.g., if we're looking for symbols that complete "w", and we have
3984 a symbol named "w1::w2", we'll find the two name components for
3985 that same symbol in the range. To be sure we only call the
3986 callback once per symbol, we first collect the symbol name
3987 indexes that matched in a temporary vector and ignore
3989 std::vector
<offset_type
> matches
;
3991 struct name_and_matcher
3993 symbol_name_matcher_ftype
*matcher
;
3996 bool operator== (const name_and_matcher
&other
) const
3998 return matcher
== other
.matcher
&& strcmp (name
, other
.name
) == 0;
4002 /* A vector holding all the different symbol name matchers, for all
4004 std::vector
<name_and_matcher
> matchers
;
4006 for (int i
= 0; i
< nr_languages
; i
++)
4008 enum language lang_e
= (enum language
) i
;
4010 const language_defn
*lang
= language_def (lang_e
);
4011 symbol_name_matcher_ftype
*name_matcher
4012 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
4014 name_and_matcher key
{
4016 lookup_name_without_params
.language_lookup_name (lang_e
)
4019 /* Don't insert the same comparison routine more than once.
4020 Note that we do this linear walk. This is not a problem in
4021 practice because the number of supported languages is
4023 if (std::find (matchers
.begin (), matchers
.end (), key
)
4026 matchers
.push_back (std::move (key
));
4029 = index
.find_name_components_bounds (lookup_name_without_params
,
4032 /* Now for each symbol name in range, check to see if we have a name
4033 match, and if so, call the MATCH_CALLBACK callback. */
4035 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4037 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4039 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
4040 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4043 matches
.push_back (bounds
.first
->idx
);
4047 std::sort (matches
.begin (), matches
.end ());
4049 /* Finally call the callback, once per match. */
4051 for (offset_type idx
: matches
)
4055 if (!match_callback (idx
))
4061 /* Above we use a type wider than idx's for 'prev', since 0 and
4062 (offset_type)-1 are both possible values. */
4063 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4068 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4070 /* A mock .gdb_index/.debug_names-like name index table, enough to
4071 exercise dw2_expand_symtabs_matching_symbol, which works with the
4072 mapped_index_base interface. Builds an index from the symbol list
4073 passed as parameter to the constructor. */
4074 class mock_mapped_index
: public mapped_index_base
4077 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4078 : m_symbol_table (symbols
)
4081 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4083 /* Return the number of names in the symbol table. */
4084 size_t symbol_name_count () const override
4086 return m_symbol_table
.size ();
4089 /* Get the name of the symbol at IDX in the symbol table. */
4090 const char *symbol_name_at (offset_type idx
) const override
4092 return m_symbol_table
[idx
];
4096 gdb::array_view
<const char *> m_symbol_table
;
4099 /* Convenience function that converts a NULL pointer to a "<null>"
4100 string, to pass to print routines. */
4103 string_or_null (const char *str
)
4105 return str
!= NULL
? str
: "<null>";
4108 /* Check if a lookup_name_info built from
4109 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4110 index. EXPECTED_LIST is the list of expected matches, in expected
4111 matching order. If no match expected, then an empty list is
4112 specified. Returns true on success. On failure prints a warning
4113 indicating the file:line that failed, and returns false. */
4116 check_match (const char *file
, int line
,
4117 mock_mapped_index
&mock_index
,
4118 const char *name
, symbol_name_match_type match_type
,
4119 bool completion_mode
,
4120 std::initializer_list
<const char *> expected_list
)
4122 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4124 bool matched
= true;
4126 auto mismatch
= [&] (const char *expected_str
,
4129 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4130 "expected=\"%s\", got=\"%s\"\n"),
4132 (match_type
== symbol_name_match_type::FULL
4134 name
, string_or_null (expected_str
), string_or_null (got
));
4138 auto expected_it
= expected_list
.begin ();
4139 auto expected_end
= expected_list
.end ();
4141 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4143 [&] (offset_type idx
)
4145 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4146 const char *expected_str
4147 = expected_it
== expected_end
? NULL
: *expected_it
++;
4149 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4150 mismatch (expected_str
, matched_name
);
4154 const char *expected_str
4155 = expected_it
== expected_end
? NULL
: *expected_it
++;
4156 if (expected_str
!= NULL
)
4157 mismatch (expected_str
, NULL
);
4162 /* The symbols added to the mock mapped_index for testing (in
4164 static const char *test_symbols
[] = {
4173 "ns2::tmpl<int>::foo2",
4174 "(anonymous namespace)::A::B::C",
4176 /* These are used to check that the increment-last-char in the
4177 matching algorithm for completion doesn't match "t1_fund" when
4178 completing "t1_func". */
4184 /* A UTF-8 name with multi-byte sequences to make sure that
4185 cp-name-parser understands this as a single identifier ("função"
4186 is "function" in PT). */
4189 /* \377 (0xff) is Latin1 'ÿ'. */
4192 /* \377 (0xff) is Latin1 'ÿ'. */
4196 /* A name with all sorts of complications. Starts with "z" to make
4197 it easier for the completion tests below. */
4198 #define Z_SYM_NAME \
4199 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4200 "::tuple<(anonymous namespace)::ui*, " \
4201 "std::default_delete<(anonymous namespace)::ui>, void>"
4206 /* Returns true if the mapped_index_base::find_name_component_bounds
4207 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4208 in completion mode. */
4211 check_find_bounds_finds (mapped_index_base
&index
,
4212 const char *search_name
,
4213 gdb::array_view
<const char *> expected_syms
)
4215 lookup_name_info
lookup_name (search_name
,
4216 symbol_name_match_type::FULL
, true);
4218 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4221 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4222 if (distance
!= expected_syms
.size ())
4225 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4227 auto nc_elem
= bounds
.first
+ exp_elem
;
4228 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4229 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4236 /* Test the lower-level mapped_index::find_name_component_bounds
4240 test_mapped_index_find_name_component_bounds ()
4242 mock_mapped_index
mock_index (test_symbols
);
4244 mock_index
.build_name_components ();
4246 /* Test the lower-level mapped_index::find_name_component_bounds
4247 method in completion mode. */
4249 static const char *expected_syms
[] = {
4254 SELF_CHECK (check_find_bounds_finds (mock_index
,
4255 "t1_func", expected_syms
));
4258 /* Check that the increment-last-char in the name matching algorithm
4259 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4261 static const char *expected_syms1
[] = {
4265 SELF_CHECK (check_find_bounds_finds (mock_index
,
4266 "\377", expected_syms1
));
4268 static const char *expected_syms2
[] = {
4271 SELF_CHECK (check_find_bounds_finds (mock_index
,
4272 "\377\377", expected_syms2
));
4276 /* Test dw2_expand_symtabs_matching_symbol. */
4279 test_dw2_expand_symtabs_matching_symbol ()
4281 mock_mapped_index
mock_index (test_symbols
);
4283 /* We let all tests run until the end even if some fails, for debug
4285 bool any_mismatch
= false;
4287 /* Create the expected symbols list (an initializer_list). Needed
4288 because lists have commas, and we need to pass them to CHECK,
4289 which is a macro. */
4290 #define EXPECT(...) { __VA_ARGS__ }
4292 /* Wrapper for check_match that passes down the current
4293 __FILE__/__LINE__. */
4294 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4295 any_mismatch |= !check_match (__FILE__, __LINE__, \
4297 NAME, MATCH_TYPE, COMPLETION_MODE, \
4300 /* Identity checks. */
4301 for (const char *sym
: test_symbols
)
4303 /* Should be able to match all existing symbols. */
4304 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4307 /* Should be able to match all existing symbols with
4309 std::string with_params
= std::string (sym
) + "(int)";
4310 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4313 /* Should be able to match all existing symbols with
4314 parameters and qualifiers. */
4315 with_params
= std::string (sym
) + " ( int ) const";
4316 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4319 /* This should really find sym, but cp-name-parser.y doesn't
4320 know about lvalue/rvalue qualifiers yet. */
4321 with_params
= std::string (sym
) + " ( int ) &&";
4322 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4326 /* Check that the name matching algorithm for completion doesn't get
4327 confused with Latin1 'ÿ' / 0xff. */
4329 static const char str
[] = "\377";
4330 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4331 EXPECT ("\377", "\377\377123"));
4334 /* Check that the increment-last-char in the matching algorithm for
4335 completion doesn't match "t1_fund" when completing "t1_func". */
4337 static const char str
[] = "t1_func";
4338 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4339 EXPECT ("t1_func", "t1_func1"));
4342 /* Check that completion mode works at each prefix of the expected
4345 static const char str
[] = "function(int)";
4346 size_t len
= strlen (str
);
4349 for (size_t i
= 1; i
< len
; i
++)
4351 lookup
.assign (str
, i
);
4352 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4353 EXPECT ("function"));
4357 /* While "w" is a prefix of both components, the match function
4358 should still only be called once. */
4360 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4362 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4366 /* Same, with a "complicated" symbol. */
4368 static const char str
[] = Z_SYM_NAME
;
4369 size_t len
= strlen (str
);
4372 for (size_t i
= 1; i
< len
; i
++)
4374 lookup
.assign (str
, i
);
4375 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4376 EXPECT (Z_SYM_NAME
));
4380 /* In FULL mode, an incomplete symbol doesn't match. */
4382 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4386 /* A complete symbol with parameters matches any overload, since the
4387 index has no overload info. */
4389 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4390 EXPECT ("std::zfunction", "std::zfunction2"));
4391 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4392 EXPECT ("std::zfunction", "std::zfunction2"));
4393 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4394 EXPECT ("std::zfunction", "std::zfunction2"));
4397 /* Check that whitespace is ignored appropriately. A symbol with a
4398 template argument list. */
4400 static const char expected
[] = "ns::foo<int>";
4401 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4403 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4407 /* Check that whitespace is ignored appropriately. A symbol with a
4408 template argument list that includes a pointer. */
4410 static const char expected
[] = "ns::foo<char*>";
4411 /* Try both completion and non-completion modes. */
4412 static const bool completion_mode
[2] = {false, true};
4413 for (size_t i
= 0; i
< 2; i
++)
4415 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4416 completion_mode
[i
], EXPECT (expected
));
4417 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4418 completion_mode
[i
], EXPECT (expected
));
4420 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4421 completion_mode
[i
], EXPECT (expected
));
4422 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4423 completion_mode
[i
], EXPECT (expected
));
4428 /* Check method qualifiers are ignored. */
4429 static const char expected
[] = "ns::foo<char*>";
4430 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4431 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4432 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4433 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4434 CHECK_MATCH ("foo < char * > ( int ) const",
4435 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4436 CHECK_MATCH ("foo < char * > ( int ) &&",
4437 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4440 /* Test lookup names that don't match anything. */
4442 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4445 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4449 /* Some wild matching tests, exercising "(anonymous namespace)",
4450 which should not be confused with a parameter list. */
4452 static const char *syms
[] = {
4456 "A :: B :: C ( int )",
4461 for (const char *s
: syms
)
4463 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4464 EXPECT ("(anonymous namespace)::A::B::C"));
4469 static const char expected
[] = "ns2::tmpl<int>::foo2";
4470 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4472 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4476 SELF_CHECK (!any_mismatch
);
4485 test_mapped_index_find_name_component_bounds ();
4486 test_dw2_expand_symtabs_matching_symbol ();
4489 }} // namespace selftests::dw2_expand_symtabs_matching
4491 #endif /* GDB_SELF_TEST */
4493 /* If FILE_MATCHER is NULL or if PER_CU has
4494 dwarf2_per_cu_quick_data::MARK set (see
4495 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4496 EXPANSION_NOTIFY on it. */
4499 dw2_expand_symtabs_matching_one
4500 (struct dwarf2_per_cu_data
*per_cu
,
4501 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4502 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4504 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4506 bool symtab_was_null
4507 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4509 dw2_instantiate_symtab (per_cu
, false);
4511 if (expansion_notify
!= NULL
4513 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4514 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4518 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4519 matched, to expand corresponding CUs that were marked. IDX is the
4520 index of the symbol name that matched. */
4523 dw2_expand_marked_cus
4524 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
4525 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4526 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4529 offset_type
*vec
, vec_len
, vec_idx
;
4530 bool global_seen
= false;
4531 mapped_index
&index
= *dwarf2_per_objfile
->per_bfd
->index_table
;
4533 vec
= (offset_type
*) (index
.constant_pool
4534 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4535 vec_len
= MAYBE_SWAP (vec
[0]);
4536 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4538 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4539 /* This value is only valid for index versions >= 7. */
4540 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4541 gdb_index_symbol_kind symbol_kind
=
4542 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4543 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4544 /* Only check the symbol attributes if they're present.
4545 Indices prior to version 7 don't record them,
4546 and indices >= 7 may elide them for certain symbols
4547 (gold does this). */
4550 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4552 /* Work around gold/15646. */
4555 if (!is_static
&& global_seen
)
4561 /* Only check the symbol's kind if it has one. */
4566 case VARIABLES_DOMAIN
:
4567 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4570 case FUNCTIONS_DOMAIN
:
4571 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4575 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4578 case MODULES_DOMAIN
:
4579 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4587 /* Don't crash on bad data. */
4588 if (cu_index
>= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
4589 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()))
4591 complaint (_(".gdb_index entry has bad CU index"
4593 objfile_name (dwarf2_per_objfile
->objfile
));
4597 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (cu_index
);
4598 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4603 /* If FILE_MATCHER is non-NULL, set all the
4604 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4605 that match FILE_MATCHER. */
4608 dw_expand_symtabs_matching_file_matcher
4609 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4610 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4612 if (file_matcher
== NULL
)
4615 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4617 NULL
, xcalloc
, xfree
));
4618 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4620 NULL
, xcalloc
, xfree
));
4622 /* The rule is CUs specify all the files, including those used by
4623 any TU, so there's no need to scan TUs here. */
4625 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4629 per_cu
->v
.quick
->mark
= 0;
4631 /* We only need to look at symtabs not already expanded. */
4632 if (per_cu
->v
.quick
->compunit_symtab
)
4635 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4636 if (file_data
== NULL
)
4639 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4641 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4643 per_cu
->v
.quick
->mark
= 1;
4647 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4649 const char *this_real_name
;
4651 if (file_matcher (file_data
->file_names
[j
], false))
4653 per_cu
->v
.quick
->mark
= 1;
4657 /* Before we invoke realpath, which can get expensive when many
4658 files are involved, do a quick comparison of the basenames. */
4659 if (!basenames_may_differ
4660 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4664 this_real_name
= dw2_get_real_path (dwarf2_per_objfile
,
4666 if (file_matcher (this_real_name
, false))
4668 per_cu
->v
.quick
->mark
= 1;
4673 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4674 ? visited_found
.get ()
4675 : visited_not_found
.get (),
4682 dw2_expand_symtabs_matching
4683 (struct objfile
*objfile
,
4684 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4685 const lookup_name_info
*lookup_name
,
4686 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4687 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4688 enum search_domain kind
)
4690 struct dwarf2_per_objfile
*dwarf2_per_objfile
4691 = get_dwarf2_per_objfile (objfile
);
4693 /* index_table is NULL if OBJF_READNOW. */
4694 if (!dwarf2_per_objfile
->per_bfd
->index_table
)
4697 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
4699 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
4701 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4705 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4711 mapped_index
&index
= *dwarf2_per_objfile
->per_bfd
->index_table
;
4713 dw2_expand_symtabs_matching_symbol (index
, *lookup_name
,
4715 kind
, [&] (offset_type idx
)
4717 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
4718 expansion_notify
, kind
);
4723 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4726 static struct compunit_symtab
*
4727 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4732 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4733 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4736 if (cust
->includes
== NULL
)
4739 for (i
= 0; cust
->includes
[i
]; ++i
)
4741 struct compunit_symtab
*s
= cust
->includes
[i
];
4743 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4751 static struct compunit_symtab
*
4752 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4753 struct bound_minimal_symbol msymbol
,
4755 struct obj_section
*section
,
4758 struct dwarf2_per_cu_data
*data
;
4759 struct compunit_symtab
*result
;
4761 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
4764 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
4765 data
= (struct dwarf2_per_cu_data
*) addrmap_find
4766 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
4770 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4771 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4772 paddress (objfile
->arch (), pc
));
4775 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
4778 gdb_assert (result
!= NULL
);
4783 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4784 void *data
, int need_fullname
)
4786 struct dwarf2_per_objfile
*dwarf2_per_objfile
4787 = get_dwarf2_per_objfile (objfile
);
4789 if (!dwarf2_per_objfile
->per_bfd
->filenames_cache
)
4791 dwarf2_per_objfile
->per_bfd
->filenames_cache
.emplace ();
4793 htab_up
visited (htab_create_alloc (10,
4794 htab_hash_pointer
, htab_eq_pointer
,
4795 NULL
, xcalloc
, xfree
));
4797 /* The rule is CUs specify all the files, including those used
4798 by any TU, so there's no need to scan TUs here. We can
4799 ignore file names coming from already-expanded CUs. */
4801 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4803 if (per_cu
->v
.quick
->compunit_symtab
)
4805 void **slot
= htab_find_slot (visited
.get (),
4806 per_cu
->v
.quick
->file_names
,
4809 *slot
= per_cu
->v
.quick
->file_names
;
4813 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4815 /* We only need to look at symtabs not already expanded. */
4816 if (per_cu
->v
.quick
->compunit_symtab
)
4819 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4820 if (file_data
== NULL
)
4823 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4826 /* Already visited. */
4831 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4833 const char *filename
= file_data
->file_names
[j
];
4834 dwarf2_per_objfile
->per_bfd
->filenames_cache
->seen (filename
);
4839 dwarf2_per_objfile
->per_bfd
->filenames_cache
->traverse ([&] (const char *filename
)
4841 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4844 this_real_name
= gdb_realpath (filename
);
4845 (*fun
) (filename
, this_real_name
.get (), data
);
4850 dw2_has_symbols (struct objfile
*objfile
)
4855 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4858 dw2_find_last_source_symtab
,
4859 dw2_forget_cached_source_info
,
4860 dw2_map_symtabs_matching_filename
,
4865 dw2_expand_symtabs_for_function
,
4866 dw2_expand_all_symtabs
,
4867 dw2_expand_symtabs_with_fullname
,
4868 dw2_map_matching_symbols
,
4869 dw2_expand_symtabs_matching
,
4870 dw2_find_pc_sect_compunit_symtab
,
4872 dw2_map_symbol_filenames
4875 /* DWARF-5 debug_names reader. */
4877 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
4878 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
4880 /* A helper function that reads the .debug_names section in SECTION
4881 and fills in MAP. FILENAME is the name of the file containing the
4882 section; it is used for error reporting.
4884 Returns true if all went well, false otherwise. */
4887 read_debug_names_from_section (struct objfile
*objfile
,
4888 const char *filename
,
4889 struct dwarf2_section_info
*section
,
4890 mapped_debug_names
&map
)
4892 if (section
->empty ())
4895 /* Older elfutils strip versions could keep the section in the main
4896 executable while splitting it for the separate debug info file. */
4897 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
4900 section
->read (objfile
);
4902 map
.dwarf5_byte_order
= gdbarch_byte_order (objfile
->arch ());
4904 const gdb_byte
*addr
= section
->buffer
;
4906 bfd
*const abfd
= section
->get_bfd_owner ();
4908 unsigned int bytes_read
;
4909 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
4912 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
4913 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
4914 if (bytes_read
+ length
!= section
->size
)
4916 /* There may be multiple per-CU indices. */
4917 warning (_("Section .debug_names in %s length %s does not match "
4918 "section length %s, ignoring .debug_names."),
4919 filename
, plongest (bytes_read
+ length
),
4920 pulongest (section
->size
));
4924 /* The version number. */
4925 uint16_t version
= read_2_bytes (abfd
, addr
);
4929 warning (_("Section .debug_names in %s has unsupported version %d, "
4930 "ignoring .debug_names."),
4936 uint16_t padding
= read_2_bytes (abfd
, addr
);
4940 warning (_("Section .debug_names in %s has unsupported padding %d, "
4941 "ignoring .debug_names."),
4946 /* comp_unit_count - The number of CUs in the CU list. */
4947 map
.cu_count
= read_4_bytes (abfd
, addr
);
4950 /* local_type_unit_count - The number of TUs in the local TU
4952 map
.tu_count
= read_4_bytes (abfd
, addr
);
4955 /* foreign_type_unit_count - The number of TUs in the foreign TU
4957 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
4959 if (foreign_tu_count
!= 0)
4961 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
4962 "ignoring .debug_names."),
4963 filename
, static_cast<unsigned long> (foreign_tu_count
));
4967 /* bucket_count - The number of hash buckets in the hash lookup
4969 map
.bucket_count
= read_4_bytes (abfd
, addr
);
4972 /* name_count - The number of unique names in the index. */
4973 map
.name_count
= read_4_bytes (abfd
, addr
);
4976 /* abbrev_table_size - The size in bytes of the abbreviations
4978 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
4981 /* augmentation_string_size - The size in bytes of the augmentation
4982 string. This value is rounded up to a multiple of 4. */
4983 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
4985 map
.augmentation_is_gdb
= ((augmentation_string_size
4986 == sizeof (dwarf5_augmentation
))
4987 && memcmp (addr
, dwarf5_augmentation
,
4988 sizeof (dwarf5_augmentation
)) == 0);
4989 augmentation_string_size
+= (-augmentation_string_size
) & 3;
4990 addr
+= augmentation_string_size
;
4993 map
.cu_table_reordered
= addr
;
4994 addr
+= map
.cu_count
* map
.offset_size
;
4996 /* List of Local TUs */
4997 map
.tu_table_reordered
= addr
;
4998 addr
+= map
.tu_count
* map
.offset_size
;
5000 /* Hash Lookup Table */
5001 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5002 addr
+= map
.bucket_count
* 4;
5003 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5004 addr
+= map
.name_count
* 4;
5007 map
.name_table_string_offs_reordered
= addr
;
5008 addr
+= map
.name_count
* map
.offset_size
;
5009 map
.name_table_entry_offs_reordered
= addr
;
5010 addr
+= map
.name_count
* map
.offset_size
;
5012 const gdb_byte
*abbrev_table_start
= addr
;
5015 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5020 const auto insertpair
5021 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5022 if (!insertpair
.second
)
5024 warning (_("Section .debug_names in %s has duplicate index %s, "
5025 "ignoring .debug_names."),
5026 filename
, pulongest (index_num
));
5029 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5030 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5035 mapped_debug_names::index_val::attr attr
;
5036 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5038 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5040 if (attr
.form
== DW_FORM_implicit_const
)
5042 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5046 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5048 indexval
.attr_vec
.push_back (std::move (attr
));
5051 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5053 warning (_("Section .debug_names in %s has abbreviation_table "
5054 "of size %s vs. written as %u, ignoring .debug_names."),
5055 filename
, plongest (addr
- abbrev_table_start
),
5059 map
.entry_pool
= addr
;
5064 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5068 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5069 const mapped_debug_names
&map
,
5070 dwarf2_section_info
§ion
,
5073 if (!map
.augmentation_is_gdb
)
5075 for (uint32_t i
= 0; i
< map
.cu_count
; ++i
)
5077 sect_offset sect_off
5078 = (sect_offset
) (extract_unsigned_integer
5079 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5081 map
.dwarf5_byte_order
));
5082 /* We don't know the length of the CU, because the CU list in a
5083 .debug_names index can be incomplete, so we can't use the start of
5084 the next CU as end of this CU. We create the CUs here with length 0,
5085 and in cutu_reader::cutu_reader we'll fill in the actual length. */
5086 dwarf2_per_cu_data
*per_cu
5087 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5089 dwarf2_per_objfile
->per_bfd
->all_comp_units
.push_back (per_cu
);
5093 sect_offset sect_off_prev
;
5094 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5096 sect_offset sect_off_next
;
5097 if (i
< map
.cu_count
)
5100 = (sect_offset
) (extract_unsigned_integer
5101 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5103 map
.dwarf5_byte_order
));
5106 sect_off_next
= (sect_offset
) section
.size
;
5109 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5110 dwarf2_per_cu_data
*per_cu
5111 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5112 sect_off_prev
, length
);
5113 dwarf2_per_objfile
->per_bfd
->all_comp_units
.push_back (per_cu
);
5115 sect_off_prev
= sect_off_next
;
5119 /* Read the CU list from the mapped index, and use it to create all
5120 the CU objects for this dwarf2_per_objfile. */
5123 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5124 const mapped_debug_names
&map
,
5125 const mapped_debug_names
&dwz_map
)
5127 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_comp_units
.empty ());
5128 dwarf2_per_objfile
->per_bfd
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5130 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5131 dwarf2_per_objfile
->per_bfd
->info
,
5132 false /* is_dwz */);
5134 if (dwz_map
.cu_count
== 0)
5137 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5138 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5142 /* Read .debug_names. If everything went ok, initialize the "quick"
5143 elements of all the CUs and return true. Otherwise, return false. */
5146 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5148 std::unique_ptr
<mapped_debug_names
> map
5149 (new mapped_debug_names (dwarf2_per_objfile
));
5150 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5151 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5153 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5154 &dwarf2_per_objfile
->per_bfd
->debug_names
,
5158 /* Don't use the index if it's empty. */
5159 if (map
->name_count
== 0)
5162 /* If there is a .dwz file, read it so we can get its CU list as
5164 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5167 if (!read_debug_names_from_section (objfile
,
5168 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5169 &dwz
->debug_names
, dwz_map
))
5171 warning (_("could not read '.debug_names' section from %s; skipping"),
5172 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5177 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5179 if (map
->tu_count
!= 0)
5181 /* We can only handle a single .debug_types when we have an
5183 if (dwarf2_per_objfile
->per_bfd
->types
.size () != 1)
5186 dwarf2_section_info
*section
= &dwarf2_per_objfile
->per_bfd
->types
[0];
5188 create_signatured_type_table_from_debug_names
5189 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->per_bfd
->abbrev
);
5192 create_addrmap_from_aranges (dwarf2_per_objfile
,
5193 &dwarf2_per_objfile
->per_bfd
->debug_aranges
);
5195 dwarf2_per_objfile
->per_bfd
->debug_names_table
= std::move (map
);
5196 dwarf2_per_objfile
->per_bfd
->using_index
= 1;
5197 dwarf2_per_objfile
->per_bfd
->quick_file_names_table
=
5198 create_quick_file_names_table (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ());
5203 /* Type used to manage iterating over all CUs looking for a symbol for
5206 class dw2_debug_names_iterator
5209 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5210 gdb::optional
<block_enum
> block_index
,
5213 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5214 m_addr (find_vec_in_debug_names (map
, name
))
5217 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5218 search_domain search
, uint32_t namei
)
5221 m_addr (find_vec_in_debug_names (map
, namei
))
5224 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5225 block_enum block_index
, domain_enum domain
,
5227 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5228 m_addr (find_vec_in_debug_names (map
, namei
))
5231 /* Return the next matching CU or NULL if there are no more. */
5232 dwarf2_per_cu_data
*next ();
5235 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5237 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5240 /* The internalized form of .debug_names. */
5241 const mapped_debug_names
&m_map
;
5243 /* If set, only look for symbols that match that block. Valid values are
5244 GLOBAL_BLOCK and STATIC_BLOCK. */
5245 const gdb::optional
<block_enum
> m_block_index
;
5247 /* The kind of symbol we're looking for. */
5248 const domain_enum m_domain
= UNDEF_DOMAIN
;
5249 const search_domain m_search
= ALL_DOMAIN
;
5251 /* The list of CUs from the index entry of the symbol, or NULL if
5253 const gdb_byte
*m_addr
;
5257 mapped_debug_names::namei_to_name (uint32_t namei
) const
5259 const ULONGEST namei_string_offs
5260 = extract_unsigned_integer ((name_table_string_offs_reordered
5261 + namei
* offset_size
),
5264 return read_indirect_string_at_offset (dwarf2_per_objfile
,
5268 /* Find a slot in .debug_names for the object named NAME. If NAME is
5269 found, return pointer to its pool data. If NAME cannot be found,
5273 dw2_debug_names_iterator::find_vec_in_debug_names
5274 (const mapped_debug_names
&map
, const char *name
)
5276 int (*cmp
) (const char *, const char *);
5278 gdb::unique_xmalloc_ptr
<char> without_params
;
5279 if (current_language
->la_language
== language_cplus
5280 || current_language
->la_language
== language_fortran
5281 || current_language
->la_language
== language_d
)
5283 /* NAME is already canonical. Drop any qualifiers as
5284 .debug_names does not contain any. */
5286 if (strchr (name
, '(') != NULL
)
5288 without_params
= cp_remove_params (name
);
5289 if (without_params
!= NULL
)
5290 name
= without_params
.get ();
5294 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5296 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5298 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5299 (map
.bucket_table_reordered
5300 + (full_hash
% map
.bucket_count
)), 4,
5301 map
.dwarf5_byte_order
);
5305 if (namei
>= map
.name_count
)
5307 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5309 namei
, map
.name_count
,
5310 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5316 const uint32_t namei_full_hash
5317 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5318 (map
.hash_table_reordered
+ namei
), 4,
5319 map
.dwarf5_byte_order
);
5320 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5323 if (full_hash
== namei_full_hash
)
5325 const char *const namei_string
= map
.namei_to_name (namei
);
5327 #if 0 /* An expensive sanity check. */
5328 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5330 complaint (_("Wrong .debug_names hash for string at index %u "
5332 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5337 if (cmp (namei_string
, name
) == 0)
5339 const ULONGEST namei_entry_offs
5340 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5341 + namei
* map
.offset_size
),
5342 map
.offset_size
, map
.dwarf5_byte_order
);
5343 return map
.entry_pool
+ namei_entry_offs
;
5348 if (namei
>= map
.name_count
)
5354 dw2_debug_names_iterator::find_vec_in_debug_names
5355 (const mapped_debug_names
&map
, uint32_t namei
)
5357 if (namei
>= map
.name_count
)
5359 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5361 namei
, map
.name_count
,
5362 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5366 const ULONGEST namei_entry_offs
5367 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5368 + namei
* map
.offset_size
),
5369 map
.offset_size
, map
.dwarf5_byte_order
);
5370 return map
.entry_pool
+ namei_entry_offs
;
5373 /* See dw2_debug_names_iterator. */
5375 dwarf2_per_cu_data
*
5376 dw2_debug_names_iterator::next ()
5381 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5382 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5383 bfd
*const abfd
= objfile
->obfd
;
5387 unsigned int bytes_read
;
5388 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5389 m_addr
+= bytes_read
;
5393 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5394 if (indexval_it
== m_map
.abbrev_map
.cend ())
5396 complaint (_("Wrong .debug_names undefined abbrev code %s "
5398 pulongest (abbrev
), objfile_name (objfile
));
5401 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5402 enum class symbol_linkage
{
5406 } symbol_linkage_
= symbol_linkage::unknown
;
5407 dwarf2_per_cu_data
*per_cu
= NULL
;
5408 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5413 case DW_FORM_implicit_const
:
5414 ull
= attr
.implicit_const
;
5416 case DW_FORM_flag_present
:
5420 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5421 m_addr
+= bytes_read
;
5424 ull
= read_4_bytes (abfd
, m_addr
);
5428 ull
= read_8_bytes (abfd
, m_addr
);
5431 case DW_FORM_ref_sig8
:
5432 ull
= read_8_bytes (abfd
, m_addr
);
5436 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5437 dwarf_form_name (attr
.form
),
5438 objfile_name (objfile
));
5441 switch (attr
.dw_idx
)
5443 case DW_IDX_compile_unit
:
5444 /* Don't crash on bad data. */
5445 if (ull
>= dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ())
5447 complaint (_(".debug_names entry has bad CU index %s"
5450 objfile_name (dwarf2_per_objfile
->objfile
));
5453 per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (ull
);
5455 case DW_IDX_type_unit
:
5456 /* Don't crash on bad data. */
5457 if (ull
>= dwarf2_per_objfile
->per_bfd
->all_type_units
.size ())
5459 complaint (_(".debug_names entry has bad TU index %s"
5462 objfile_name (dwarf2_per_objfile
->objfile
));
5465 per_cu
= &dwarf2_per_objfile
->per_bfd
->get_tu (ull
)->per_cu
;
5467 case DW_IDX_die_offset
:
5468 /* In a per-CU index (as opposed to a per-module index), index
5469 entries without CU attribute implicitly refer to the single CU. */
5471 per_cu
= dwarf2_per_objfile
->per_bfd
->get_cu (0);
5473 case DW_IDX_GNU_internal
:
5474 if (!m_map
.augmentation_is_gdb
)
5476 symbol_linkage_
= symbol_linkage::static_
;
5478 case DW_IDX_GNU_external
:
5479 if (!m_map
.augmentation_is_gdb
)
5481 symbol_linkage_
= symbol_linkage::extern_
;
5486 /* Skip if already read in. */
5487 if (per_cu
->v
.quick
->compunit_symtab
)
5490 /* Check static vs global. */
5491 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5493 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5494 const bool symbol_is_static
=
5495 symbol_linkage_
== symbol_linkage::static_
;
5496 if (want_static
!= symbol_is_static
)
5500 /* Match dw2_symtab_iter_next, symbol_kind
5501 and debug_names::psymbol_tag. */
5505 switch (indexval
.dwarf_tag
)
5507 case DW_TAG_variable
:
5508 case DW_TAG_subprogram
:
5509 /* Some types are also in VAR_DOMAIN. */
5510 case DW_TAG_typedef
:
5511 case DW_TAG_structure_type
:
5518 switch (indexval
.dwarf_tag
)
5520 case DW_TAG_typedef
:
5521 case DW_TAG_structure_type
:
5528 switch (indexval
.dwarf_tag
)
5531 case DW_TAG_variable
:
5538 switch (indexval
.dwarf_tag
)
5550 /* Match dw2_expand_symtabs_matching, symbol_kind and
5551 debug_names::psymbol_tag. */
5554 case VARIABLES_DOMAIN
:
5555 switch (indexval
.dwarf_tag
)
5557 case DW_TAG_variable
:
5563 case FUNCTIONS_DOMAIN
:
5564 switch (indexval
.dwarf_tag
)
5566 case DW_TAG_subprogram
:
5573 switch (indexval
.dwarf_tag
)
5575 case DW_TAG_typedef
:
5576 case DW_TAG_structure_type
:
5582 case MODULES_DOMAIN
:
5583 switch (indexval
.dwarf_tag
)
5597 static struct compunit_symtab
*
5598 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5599 const char *name
, domain_enum domain
)
5601 struct dwarf2_per_objfile
*dwarf2_per_objfile
5602 = get_dwarf2_per_objfile (objfile
);
5604 const auto &mapp
= dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5607 /* index is NULL if OBJF_READNOW. */
5610 const auto &map
= *mapp
;
5612 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
5614 struct compunit_symtab
*stab_best
= NULL
;
5615 struct dwarf2_per_cu_data
*per_cu
;
5616 while ((per_cu
= iter
.next ()) != NULL
)
5618 struct symbol
*sym
, *with_opaque
= NULL
;
5619 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
5620 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5621 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5623 sym
= block_find_symbol (block
, name
, domain
,
5624 block_find_non_opaque_type_preferred
,
5627 /* Some caution must be observed with overloaded functions and
5628 methods, since the index will not contain any overload
5629 information (but NAME might contain it). */
5632 && strcmp_iw (sym
->search_name (), name
) == 0)
5634 if (with_opaque
!= NULL
5635 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5638 /* Keep looking through other CUs. */
5644 /* This dumps minimal information about .debug_names. It is called
5645 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5646 uses this to verify that .debug_names has been loaded. */
5649 dw2_debug_names_dump (struct objfile
*objfile
)
5651 struct dwarf2_per_objfile
*dwarf2_per_objfile
5652 = get_dwarf2_per_objfile (objfile
);
5654 gdb_assert (dwarf2_per_objfile
->per_bfd
->using_index
);
5655 printf_filtered (".debug_names:");
5656 if (dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5657 printf_filtered (" exists\n");
5659 printf_filtered (" faked for \"readnow\"\n");
5660 printf_filtered ("\n");
5664 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5665 const char *func_name
)
5667 struct dwarf2_per_objfile
*dwarf2_per_objfile
5668 = get_dwarf2_per_objfile (objfile
);
5670 /* dwarf2_per_objfile->per_bfd->debug_names_table is NULL if OBJF_READNOW. */
5671 if (dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5673 const mapped_debug_names
&map
= *dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5675 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
5677 struct dwarf2_per_cu_data
*per_cu
;
5678 while ((per_cu
= iter
.next ()) != NULL
)
5679 dw2_instantiate_symtab (per_cu
, false);
5684 dw2_debug_names_map_matching_symbols
5685 (struct objfile
*objfile
,
5686 const lookup_name_info
&name
, domain_enum domain
,
5688 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5689 symbol_compare_ftype
*ordered_compare
)
5691 struct dwarf2_per_objfile
*dwarf2_per_objfile
5692 = get_dwarf2_per_objfile (objfile
);
5694 /* debug_names_table is NULL if OBJF_READNOW. */
5695 if (!dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5698 mapped_debug_names
&map
= *dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5699 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5701 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5702 auto matcher
= [&] (const char *symname
)
5704 if (ordered_compare
== nullptr)
5706 return ordered_compare (symname
, match_name
) == 0;
5709 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5710 [&] (offset_type namei
)
5712 /* The name was matched, now expand corresponding CUs that were
5714 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
5716 struct dwarf2_per_cu_data
*per_cu
;
5717 while ((per_cu
= iter
.next ()) != NULL
)
5718 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
5722 /* It's a shame we couldn't do this inside the
5723 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5724 that have already been expanded. Instead, this loop matches what
5725 the psymtab code does. */
5726 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
5728 struct compunit_symtab
*cust
= per_cu
->v
.quick
->compunit_symtab
;
5729 if (cust
!= nullptr)
5731 const struct block
*block
5732 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
5733 if (!iterate_over_symbols_terminated (block
, name
,
5741 dw2_debug_names_expand_symtabs_matching
5742 (struct objfile
*objfile
,
5743 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5744 const lookup_name_info
*lookup_name
,
5745 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5746 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5747 enum search_domain kind
)
5749 struct dwarf2_per_objfile
*dwarf2_per_objfile
5750 = get_dwarf2_per_objfile (objfile
);
5752 /* debug_names_table is NULL if OBJF_READNOW. */
5753 if (!dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5756 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5758 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
5760 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
5764 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5770 mapped_debug_names
&map
= *dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5772 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
5774 kind
, [&] (offset_type namei
)
5776 /* The name was matched, now expand corresponding CUs that were
5778 dw2_debug_names_iterator
iter (map
, kind
, namei
);
5780 struct dwarf2_per_cu_data
*per_cu
;
5781 while ((per_cu
= iter
.next ()) != NULL
)
5782 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5788 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5791 dw2_find_last_source_symtab
,
5792 dw2_forget_cached_source_info
,
5793 dw2_map_symtabs_matching_filename
,
5794 dw2_debug_names_lookup_symbol
,
5797 dw2_debug_names_dump
,
5798 dw2_debug_names_expand_symtabs_for_function
,
5799 dw2_expand_all_symtabs
,
5800 dw2_expand_symtabs_with_fullname
,
5801 dw2_debug_names_map_matching_symbols
,
5802 dw2_debug_names_expand_symtabs_matching
,
5803 dw2_find_pc_sect_compunit_symtab
,
5805 dw2_map_symbol_filenames
5808 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5809 to either a dwarf2_per_bfd or dwz_file object. */
5811 template <typename T
>
5812 static gdb::array_view
<const gdb_byte
>
5813 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5815 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5817 if (section
->empty ())
5820 /* Older elfutils strip versions could keep the section in the main
5821 executable while splitting it for the separate debug info file. */
5822 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5825 section
->read (obj
);
5827 /* dwarf2_section_info::size is a bfd_size_type, while
5828 gdb::array_view works with size_t. On 32-bit hosts, with
5829 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5830 is 32-bit. So we need an explicit narrowing conversion here.
5831 This is fine, because it's impossible to allocate or mmap an
5832 array/buffer larger than what size_t can represent. */
5833 return gdb::make_array_view (section
->buffer
, section
->size
);
5836 /* Lookup the index cache for the contents of the index associated to
5839 static gdb::array_view
<const gdb_byte
>
5840 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_bfd
*dwarf2_per_bfd
)
5842 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5843 if (build_id
== nullptr)
5846 return global_index_cache
.lookup_gdb_index (build_id
,
5847 &dwarf2_per_bfd
->index_cache_res
);
5850 /* Same as the above, but for DWZ. */
5852 static gdb::array_view
<const gdb_byte
>
5853 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5855 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5856 if (build_id
== nullptr)
5859 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5862 /* See symfile.h. */
5865 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
5867 struct dwarf2_per_objfile
*dwarf2_per_objfile
5868 = get_dwarf2_per_objfile (objfile
);
5870 /* If we're about to read full symbols, don't bother with the
5871 indices. In this case we also don't care if some other debug
5872 format is making psymtabs, because they are all about to be
5874 if ((objfile
->flags
& OBJF_READNOW
))
5876 dwarf2_per_objfile
->per_bfd
->using_index
= 1;
5877 create_all_comp_units (dwarf2_per_objfile
);
5878 create_all_type_units (dwarf2_per_objfile
);
5879 dwarf2_per_objfile
->per_bfd
->quick_file_names_table
5880 = create_quick_file_names_table
5881 (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ());
5883 for (int i
= 0; i
< (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
5884 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()); ++i
)
5886 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (i
);
5888 per_cu
->v
.quick
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
5889 struct dwarf2_per_cu_quick_data
);
5892 /* Return 1 so that gdb sees the "quick" functions. However,
5893 these functions will be no-ops because we will have expanded
5895 *index_kind
= dw_index_kind::GDB_INDEX
;
5899 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
5901 *index_kind
= dw_index_kind::DEBUG_NAMES
;
5905 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5906 get_gdb_index_contents_from_section
<struct dwarf2_per_bfd
>,
5907 get_gdb_index_contents_from_section
<dwz_file
>))
5909 *index_kind
= dw_index_kind::GDB_INDEX
;
5913 /* ... otherwise, try to find the index in the index cache. */
5914 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5915 get_gdb_index_contents_from_cache
,
5916 get_gdb_index_contents_from_cache_dwz
))
5918 global_index_cache
.hit ();
5919 *index_kind
= dw_index_kind::GDB_INDEX
;
5923 global_index_cache
.miss ();
5929 /* Build a partial symbol table. */
5932 dwarf2_build_psymtabs (struct objfile
*objfile
)
5934 struct dwarf2_per_objfile
*dwarf2_per_objfile
5935 = get_dwarf2_per_objfile (objfile
);
5937 init_psymbol_list (objfile
, 1024);
5941 /* This isn't really ideal: all the data we allocate on the
5942 objfile's obstack is still uselessly kept around. However,
5943 freeing it seems unsafe. */
5944 psymtab_discarder
psymtabs (objfile
);
5945 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
5948 /* (maybe) store an index in the cache. */
5949 global_index_cache
.store (dwarf2_per_objfile
);
5951 catch (const gdb_exception_error
&except
)
5953 exception_print (gdb_stderr
, except
);
5957 /* Find the base address of the compilation unit for range lists and
5958 location lists. It will normally be specified by DW_AT_low_pc.
5959 In DWARF-3 draft 4, the base address could be overridden by
5960 DW_AT_entry_pc. It's been removed, but GCC still uses this for
5961 compilation units with discontinuous ranges. */
5964 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
5966 struct attribute
*attr
;
5968 cu
->base_address
.reset ();
5970 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
5971 if (attr
!= nullptr)
5972 cu
->base_address
= attr
->value_as_address ();
5975 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5976 if (attr
!= nullptr)
5977 cu
->base_address
= attr
->value_as_address ();
5981 /* Helper function that returns the proper abbrev section for
5984 static struct dwarf2_section_info
*
5985 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
5987 struct dwarf2_section_info
*abbrev
;
5988 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
5990 if (this_cu
->is_dwz
)
5991 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
5993 abbrev
= &dwarf2_per_objfile
->per_bfd
->abbrev
;
5998 /* Fetch the abbreviation table offset from a comp or type unit header. */
6001 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6002 struct dwarf2_section_info
*section
,
6003 sect_offset sect_off
)
6005 bfd
*abfd
= section
->get_bfd_owner ();
6006 const gdb_byte
*info_ptr
;
6007 unsigned int initial_length_size
, offset_size
;
6010 section
->read (dwarf2_per_objfile
->objfile
);
6011 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6012 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6013 offset_size
= initial_length_size
== 4 ? 4 : 8;
6014 info_ptr
+= initial_length_size
;
6016 version
= read_2_bytes (abfd
, info_ptr
);
6020 /* Skip unit type and address size. */
6024 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
6027 /* A partial symtab that is used only for include files. */
6028 struct dwarf2_include_psymtab
: public partial_symtab
6030 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
6031 : partial_symtab (filename
, objfile
)
6035 void read_symtab (struct objfile
*objfile
) override
6037 /* It's an include file, no symbols to read for it.
6038 Everything is in the includer symtab. */
6040 /* The expansion of a dwarf2_include_psymtab is just a trigger for
6041 expansion of the includer psymtab. We use the dependencies[0] field to
6042 model the includer. But if we go the regular route of calling
6043 expand_psymtab here, and having expand_psymtab call expand_dependencies
6044 to expand the includer, we'll only use expand_psymtab on the includer
6045 (making it a non-toplevel psymtab), while if we expand the includer via
6046 another path, we'll use read_symtab (making it a toplevel psymtab).
6047 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
6048 psymtab, and trigger read_symtab on the includer here directly. */
6049 includer ()->read_symtab (objfile
);
6052 void expand_psymtab (struct objfile
*objfile
) override
6054 /* This is not called by read_symtab, and should not be called by any
6055 expand_dependencies. */
6059 bool readin_p (struct objfile
*objfile
) const override
6061 return includer ()->readin_p (objfile
);
6064 compunit_symtab
*get_compunit_symtab (struct objfile
*objfile
) const override
6070 partial_symtab
*includer () const
6072 /* An include psymtab has exactly one dependency: the psymtab that
6074 gdb_assert (this->number_of_dependencies
== 1);
6075 return this->dependencies
[0];
6079 /* Allocate a new partial symtab for file named NAME and mark this new
6080 partial symtab as being an include of PST. */
6083 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
6084 struct objfile
*objfile
)
6086 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
6088 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6089 subpst
->dirname
= pst
->dirname
;
6091 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6092 subpst
->dependencies
[0] = pst
;
6093 subpst
->number_of_dependencies
= 1;
6096 /* Read the Line Number Program data and extract the list of files
6097 included by the source file represented by PST. Build an include
6098 partial symtab for each of these included files. */
6101 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6102 struct die_info
*die
,
6103 dwarf2_psymtab
*pst
)
6106 struct attribute
*attr
;
6108 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6109 if (attr
!= nullptr)
6110 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6112 return; /* No linetable, so no includes. */
6114 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6115 that we pass in the raw text_low here; that is ok because we're
6116 only decoding the line table to make include partial symtabs, and
6117 so the addresses aren't really used. */
6118 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6119 pst
->raw_text_low (), 1);
6123 hash_signatured_type (const void *item
)
6125 const struct signatured_type
*sig_type
6126 = (const struct signatured_type
*) item
;
6128 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6129 return sig_type
->signature
;
6133 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6135 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6136 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6138 return lhs
->signature
== rhs
->signature
;
6141 /* Allocate a hash table for signatured types. */
6144 allocate_signatured_type_table ()
6146 return htab_up (htab_create_alloc (41,
6147 hash_signatured_type
,
6149 NULL
, xcalloc
, xfree
));
6152 /* A helper function to add a signatured type CU to a table. */
6155 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6157 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6158 std::vector
<signatured_type
*> *all_type_units
6159 = (std::vector
<signatured_type
*> *) datum
;
6161 all_type_units
->push_back (sigt
);
6166 /* A helper for create_debug_types_hash_table. Read types from SECTION
6167 and fill them into TYPES_HTAB. It will process only type units,
6168 therefore DW_UT_type. */
6171 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6172 struct dwo_file
*dwo_file
,
6173 dwarf2_section_info
*section
, htab_up
&types_htab
,
6174 rcuh_kind section_kind
)
6176 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6177 struct dwarf2_section_info
*abbrev_section
;
6179 const gdb_byte
*info_ptr
, *end_ptr
;
6181 abbrev_section
= (dwo_file
!= NULL
6182 ? &dwo_file
->sections
.abbrev
6183 : &dwarf2_per_objfile
->per_bfd
->abbrev
);
6185 if (dwarf_read_debug
)
6186 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6187 section
->get_name (),
6188 abbrev_section
->get_file_name ());
6190 section
->read (objfile
);
6191 info_ptr
= section
->buffer
;
6193 if (info_ptr
== NULL
)
6196 /* We can't set abfd until now because the section may be empty or
6197 not present, in which case the bfd is unknown. */
6198 abfd
= section
->get_bfd_owner ();
6200 /* We don't use cutu_reader here because we don't need to read
6201 any dies: the signature is in the header. */
6203 end_ptr
= info_ptr
+ section
->size
;
6204 while (info_ptr
< end_ptr
)
6206 struct signatured_type
*sig_type
;
6207 struct dwo_unit
*dwo_tu
;
6209 const gdb_byte
*ptr
= info_ptr
;
6210 struct comp_unit_head header
;
6211 unsigned int length
;
6213 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6215 /* Initialize it due to a false compiler warning. */
6216 header
.signature
= -1;
6217 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6219 /* We need to read the type's signature in order to build the hash
6220 table, but we don't need anything else just yet. */
6222 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6223 abbrev_section
, ptr
, section_kind
);
6225 length
= header
.get_length ();
6227 /* Skip dummy type units. */
6228 if (ptr
>= info_ptr
+ length
6229 || peek_abbrev_code (abfd
, ptr
) == 0
6230 || header
.unit_type
!= DW_UT_type
)
6236 if (types_htab
== NULL
)
6239 types_htab
= allocate_dwo_unit_table ();
6241 types_htab
= allocate_signatured_type_table ();
6247 dwo_tu
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
6249 dwo_tu
->dwo_file
= dwo_file
;
6250 dwo_tu
->signature
= header
.signature
;
6251 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6252 dwo_tu
->section
= section
;
6253 dwo_tu
->sect_off
= sect_off
;
6254 dwo_tu
->length
= length
;
6258 /* N.B.: type_offset is not usable if this type uses a DWO file.
6259 The real type_offset is in the DWO file. */
6261 sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
6262 sig_type
->signature
= header
.signature
;
6263 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6264 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6265 sig_type
->per_cu
.is_debug_types
= 1;
6266 sig_type
->per_cu
.section
= section
;
6267 sig_type
->per_cu
.sect_off
= sect_off
;
6268 sig_type
->per_cu
.length
= length
;
6271 slot
= htab_find_slot (types_htab
.get (),
6272 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6274 gdb_assert (slot
!= NULL
);
6277 sect_offset dup_sect_off
;
6281 const struct dwo_unit
*dup_tu
6282 = (const struct dwo_unit
*) *slot
;
6284 dup_sect_off
= dup_tu
->sect_off
;
6288 const struct signatured_type
*dup_tu
6289 = (const struct signatured_type
*) *slot
;
6291 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6294 complaint (_("debug type entry at offset %s is duplicate to"
6295 " the entry at offset %s, signature %s"),
6296 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6297 hex_string (header
.signature
));
6299 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6301 if (dwarf_read_debug
> 1)
6302 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6303 sect_offset_str (sect_off
),
6304 hex_string (header
.signature
));
6310 /* Create the hash table of all entries in the .debug_types
6311 (or .debug_types.dwo) section(s).
6312 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6313 otherwise it is NULL.
6315 The result is a pointer to the hash table or NULL if there are no types.
6317 Note: This function processes DWO files only, not DWP files. */
6320 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6321 struct dwo_file
*dwo_file
,
6322 gdb::array_view
<dwarf2_section_info
> type_sections
,
6323 htab_up
&types_htab
)
6325 for (dwarf2_section_info
§ion
: type_sections
)
6326 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6327 types_htab
, rcuh_kind::TYPE
);
6330 /* Create the hash table of all entries in the .debug_types section,
6331 and initialize all_type_units.
6332 The result is zero if there is an error (e.g. missing .debug_types section),
6333 otherwise non-zero. */
6336 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6340 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6341 &dwarf2_per_objfile
->per_bfd
->info
, types_htab
,
6342 rcuh_kind::COMPILE
);
6343 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6344 dwarf2_per_objfile
->per_bfd
->types
, types_htab
);
6345 if (types_htab
== NULL
)
6347 dwarf2_per_objfile
->per_bfd
->signatured_types
= NULL
;
6351 dwarf2_per_objfile
->per_bfd
->signatured_types
= std::move (types_htab
);
6353 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ());
6354 dwarf2_per_objfile
->per_bfd
->all_type_units
.reserve
6355 (htab_elements (dwarf2_per_objfile
->per_bfd
->signatured_types
.get ()));
6357 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6358 add_signatured_type_cu_to_table
,
6359 &dwarf2_per_objfile
->per_bfd
->all_type_units
);
6364 /* Add an entry for signature SIG to dwarf2_per_objfile->per_bfd->signatured_types.
6365 If SLOT is non-NULL, it is the entry to use in the hash table.
6366 Otherwise we find one. */
6368 static struct signatured_type
*
6369 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6372 if (dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()
6373 == dwarf2_per_objfile
->per_bfd
->all_type_units
.capacity ())
6374 ++dwarf2_per_objfile
->per_bfd
->tu_stats
.nr_all_type_units_reallocs
;
6376 signatured_type
*sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
6378 dwarf2_per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
6379 sig_type
->signature
= sig
;
6380 sig_type
->per_cu
.is_debug_types
= 1;
6381 if (dwarf2_per_objfile
->per_bfd
->using_index
)
6383 sig_type
->per_cu
.v
.quick
=
6384 OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
6385 struct dwarf2_per_cu_quick_data
);
6390 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6393 gdb_assert (*slot
== NULL
);
6395 /* The rest of sig_type must be filled in by the caller. */
6399 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6400 Fill in SIG_ENTRY with DWO_ENTRY. */
6403 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6404 struct signatured_type
*sig_entry
,
6405 struct dwo_unit
*dwo_entry
)
6407 /* Make sure we're not clobbering something we don't expect to. */
6408 gdb_assert (! sig_entry
->per_cu
.queued
);
6409 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6410 if (dwarf2_per_objfile
->per_bfd
->using_index
)
6412 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6413 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6416 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6417 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6418 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6419 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6420 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6422 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6423 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6424 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6425 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6426 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6427 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6428 sig_entry
->dwo_unit
= dwo_entry
;
6431 /* Subroutine of lookup_signatured_type.
6432 If we haven't read the TU yet, create the signatured_type data structure
6433 for a TU to be read in directly from a DWO file, bypassing the stub.
6434 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6435 using .gdb_index, then when reading a CU we want to stay in the DWO file
6436 containing that CU. Otherwise we could end up reading several other DWO
6437 files (due to comdat folding) to process the transitive closure of all the
6438 mentioned TUs, and that can be slow. The current DWO file will have every
6439 type signature that it needs.
6440 We only do this for .gdb_index because in the psymtab case we already have
6441 to read all the DWOs to build the type unit groups. */
6443 static struct signatured_type
*
6444 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6446 struct dwarf2_per_objfile
*dwarf2_per_objfile
6447 = cu
->per_cu
->dwarf2_per_objfile
;
6448 struct dwo_file
*dwo_file
;
6449 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6450 struct signatured_type find_sig_entry
, *sig_entry
;
6453 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->per_bfd
->using_index
);
6455 /* If TU skeletons have been removed then we may not have read in any
6457 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
6458 dwarf2_per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
6460 /* We only ever need to read in one copy of a signatured type.
6461 Use the global signatured_types array to do our own comdat-folding
6462 of types. If this is the first time we're reading this TU, and
6463 the TU has an entry in .gdb_index, replace the recorded data from
6464 .gdb_index with this TU. */
6466 find_sig_entry
.signature
= sig
;
6467 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6468 &find_sig_entry
, INSERT
);
6469 sig_entry
= (struct signatured_type
*) *slot
;
6471 /* We can get here with the TU already read, *or* in the process of being
6472 read. Don't reassign the global entry to point to this DWO if that's
6473 the case. Also note that if the TU is already being read, it may not
6474 have come from a DWO, the program may be a mix of Fission-compiled
6475 code and non-Fission-compiled code. */
6477 /* Have we already tried to read this TU?
6478 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6479 needn't exist in the global table yet). */
6480 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6483 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6484 dwo_unit of the TU itself. */
6485 dwo_file
= cu
->dwo_unit
->dwo_file
;
6487 /* Ok, this is the first time we're reading this TU. */
6488 if (dwo_file
->tus
== NULL
)
6490 find_dwo_entry
.signature
= sig
;
6491 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6493 if (dwo_entry
== NULL
)
6496 /* If the global table doesn't have an entry for this TU, add one. */
6497 if (sig_entry
== NULL
)
6498 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6500 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6501 sig_entry
->per_cu
.tu_read
= 1;
6505 /* Subroutine of lookup_signatured_type.
6506 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6507 then try the DWP file. If the TU stub (skeleton) has been removed then
6508 it won't be in .gdb_index. */
6510 static struct signatured_type
*
6511 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6513 struct dwarf2_per_objfile
*dwarf2_per_objfile
6514 = cu
->per_cu
->dwarf2_per_objfile
;
6515 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6516 struct dwo_unit
*dwo_entry
;
6517 struct signatured_type find_sig_entry
, *sig_entry
;
6520 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->per_bfd
->using_index
);
6521 gdb_assert (dwp_file
!= NULL
);
6523 /* If TU skeletons have been removed then we may not have read in any
6525 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
6526 dwarf2_per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
6528 find_sig_entry
.signature
= sig
;
6529 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6530 &find_sig_entry
, INSERT
);
6531 sig_entry
= (struct signatured_type
*) *slot
;
6533 /* Have we already tried to read this TU?
6534 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6535 needn't exist in the global table yet). */
6536 if (sig_entry
!= NULL
)
6539 if (dwp_file
->tus
== NULL
)
6541 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6542 sig
, 1 /* is_debug_types */);
6543 if (dwo_entry
== NULL
)
6546 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6547 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6552 /* Lookup a signature based type for DW_FORM_ref_sig8.
6553 Returns NULL if signature SIG is not present in the table.
6554 It is up to the caller to complain about this. */
6556 static struct signatured_type
*
6557 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6559 struct dwarf2_per_objfile
*dwarf2_per_objfile
6560 = cu
->per_cu
->dwarf2_per_objfile
;
6563 && dwarf2_per_objfile
->per_bfd
->using_index
)
6565 /* We're in a DWO/DWP file, and we're using .gdb_index.
6566 These cases require special processing. */
6567 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
6568 return lookup_dwo_signatured_type (cu
, sig
);
6570 return lookup_dwp_signatured_type (cu
, sig
);
6574 struct signatured_type find_entry
, *entry
;
6576 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
6578 find_entry
.signature
= sig
;
6579 entry
= ((struct signatured_type
*)
6580 htab_find (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6586 /* Low level DIE reading support. */
6588 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6591 init_cu_die_reader (struct die_reader_specs
*reader
,
6592 struct dwarf2_cu
*cu
,
6593 struct dwarf2_section_info
*section
,
6594 struct dwo_file
*dwo_file
,
6595 struct abbrev_table
*abbrev_table
)
6597 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6598 reader
->abfd
= section
->get_bfd_owner ();
6600 reader
->dwo_file
= dwo_file
;
6601 reader
->die_section
= section
;
6602 reader
->buffer
= section
->buffer
;
6603 reader
->buffer_end
= section
->buffer
+ section
->size
;
6604 reader
->abbrev_table
= abbrev_table
;
6607 /* Subroutine of cutu_reader to simplify it.
6608 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6609 There's just a lot of work to do, and cutu_reader is big enough
6612 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6613 from it to the DIE in the DWO. If NULL we are skipping the stub.
6614 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6615 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6616 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6617 STUB_COMP_DIR may be non-NULL.
6618 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6619 are filled in with the info of the DIE from the DWO file.
6620 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6621 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6622 kept around for at least as long as *RESULT_READER.
6624 The result is non-zero if a valid (non-dummy) DIE was found. */
6627 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
6628 struct dwo_unit
*dwo_unit
,
6629 struct die_info
*stub_comp_unit_die
,
6630 const char *stub_comp_dir
,
6631 struct die_reader_specs
*result_reader
,
6632 const gdb_byte
**result_info_ptr
,
6633 struct die_info
**result_comp_unit_die
,
6634 abbrev_table_up
*result_dwo_abbrev_table
)
6636 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6637 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6638 struct dwarf2_cu
*cu
= this_cu
->cu
;
6640 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6641 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6642 int i
,num_extra_attrs
;
6643 struct dwarf2_section_info
*dwo_abbrev_section
;
6644 struct die_info
*comp_unit_die
;
6646 /* At most one of these may be provided. */
6647 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6649 /* These attributes aren't processed until later:
6650 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6651 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6652 referenced later. However, these attributes are found in the stub
6653 which we won't have later. In order to not impose this complication
6654 on the rest of the code, we read them here and copy them to the
6663 if (stub_comp_unit_die
!= NULL
)
6665 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6667 if (! this_cu
->is_debug_types
)
6668 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6669 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6670 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6671 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6672 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6674 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6676 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6677 here (if needed). We need the value before we can process
6679 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6681 else if (stub_comp_dir
!= NULL
)
6683 /* Reconstruct the comp_dir attribute to simplify the code below. */
6684 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6685 comp_dir
->name
= DW_AT_comp_dir
;
6686 comp_dir
->form
= DW_FORM_string
;
6687 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6688 DW_STRING (comp_dir
) = stub_comp_dir
;
6691 /* Set up for reading the DWO CU/TU. */
6692 cu
->dwo_unit
= dwo_unit
;
6693 dwarf2_section_info
*section
= dwo_unit
->section
;
6694 section
->read (objfile
);
6695 abfd
= section
->get_bfd_owner ();
6696 begin_info_ptr
= info_ptr
= (section
->buffer
6697 + to_underlying (dwo_unit
->sect_off
));
6698 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6700 if (this_cu
->is_debug_types
)
6702 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
6704 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6705 &cu
->header
, section
,
6707 info_ptr
, rcuh_kind::TYPE
);
6708 /* This is not an assert because it can be caused by bad debug info. */
6709 if (sig_type
->signature
!= cu
->header
.signature
)
6711 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6712 " TU at offset %s [in module %s]"),
6713 hex_string (sig_type
->signature
),
6714 hex_string (cu
->header
.signature
),
6715 sect_offset_str (dwo_unit
->sect_off
),
6716 bfd_get_filename (abfd
));
6718 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6719 /* For DWOs coming from DWP files, we don't know the CU length
6720 nor the type's offset in the TU until now. */
6721 dwo_unit
->length
= cu
->header
.get_length ();
6722 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6724 /* Establish the type offset that can be used to lookup the type.
6725 For DWO files, we don't know it until now. */
6726 sig_type
->type_offset_in_section
6727 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6731 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6732 &cu
->header
, section
,
6734 info_ptr
, rcuh_kind::COMPILE
);
6735 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6736 /* For DWOs coming from DWP files, we don't know the CU length
6738 dwo_unit
->length
= cu
->header
.get_length ();
6741 *result_dwo_abbrev_table
6742 = abbrev_table::read (objfile
, dwo_abbrev_section
,
6743 cu
->header
.abbrev_sect_off
);
6744 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
6745 result_dwo_abbrev_table
->get ());
6747 /* Read in the die, but leave space to copy over the attributes
6748 from the stub. This has the benefit of simplifying the rest of
6749 the code - all the work to maintain the illusion of a single
6750 DW_TAG_{compile,type}_unit DIE is done here. */
6751 num_extra_attrs
= ((stmt_list
!= NULL
)
6755 + (comp_dir
!= NULL
));
6756 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6759 /* Copy over the attributes from the stub to the DIE we just read in. */
6760 comp_unit_die
= *result_comp_unit_die
;
6761 i
= comp_unit_die
->num_attrs
;
6762 if (stmt_list
!= NULL
)
6763 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6765 comp_unit_die
->attrs
[i
++] = *low_pc
;
6766 if (high_pc
!= NULL
)
6767 comp_unit_die
->attrs
[i
++] = *high_pc
;
6769 comp_unit_die
->attrs
[i
++] = *ranges
;
6770 if (comp_dir
!= NULL
)
6771 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6772 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6774 if (dwarf_die_debug
)
6776 fprintf_unfiltered (gdb_stdlog
,
6777 "Read die from %s@0x%x of %s:\n",
6778 section
->get_name (),
6779 (unsigned) (begin_info_ptr
- section
->buffer
),
6780 bfd_get_filename (abfd
));
6781 dump_die (comp_unit_die
, dwarf_die_debug
);
6784 /* Skip dummy compilation units. */
6785 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6786 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6789 *result_info_ptr
= info_ptr
;
6793 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
6794 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
6795 signature is part of the header. */
6796 static gdb::optional
<ULONGEST
>
6797 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
6799 if (cu
->header
.version
>= 5)
6800 return cu
->header
.signature
;
6801 struct attribute
*attr
;
6802 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6803 if (attr
== nullptr)
6804 return gdb::optional
<ULONGEST
> ();
6805 return DW_UNSND (attr
);
6808 /* Subroutine of cutu_reader to simplify it.
6809 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6810 Returns NULL if the specified DWO unit cannot be found. */
6812 static struct dwo_unit
*
6813 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
6814 struct die_info
*comp_unit_die
,
6815 const char *dwo_name
)
6817 struct dwarf2_cu
*cu
= this_cu
->cu
;
6818 struct dwo_unit
*dwo_unit
;
6819 const char *comp_dir
;
6821 gdb_assert (cu
!= NULL
);
6823 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6824 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6825 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6827 if (this_cu
->is_debug_types
)
6829 struct signatured_type
*sig_type
;
6831 /* Since this_cu is the first member of struct signatured_type,
6832 we can go from a pointer to one to a pointer to the other. */
6833 sig_type
= (struct signatured_type
*) this_cu
;
6834 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
6838 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
6839 if (!signature
.has_value ())
6840 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6842 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
6843 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
6850 /* Subroutine of cutu_reader to simplify it.
6851 See it for a description of the parameters.
6852 Read a TU directly from a DWO file, bypassing the stub. */
6855 cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
6856 int use_existing_cu
)
6858 struct signatured_type
*sig_type
;
6860 /* Verify we can do the following downcast, and that we have the
6862 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6863 sig_type
= (struct signatured_type
*) this_cu
;
6864 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6866 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6868 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6869 /* There's no need to do the rereading_dwo_cu handling that
6870 cutu_reader does since we don't read the stub. */
6874 /* If !use_existing_cu, this_cu->cu must be NULL. */
6875 gdb_assert (this_cu
->cu
== NULL
);
6876 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6879 /* A future optimization, if needed, would be to use an existing
6880 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6881 could share abbrev tables. */
6883 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
6884 NULL
/* stub_comp_unit_die */,
6885 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6888 &m_dwo_abbrev_table
) == 0)
6895 /* Initialize a CU (or TU) and read its DIEs.
6896 If the CU defers to a DWO file, read the DWO file as well.
6898 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6899 Otherwise the table specified in the comp unit header is read in and used.
6900 This is an optimization for when we already have the abbrev table.
6902 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6903 Otherwise, a new CU is allocated with xmalloc. */
6905 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
6906 struct abbrev_table
*abbrev_table
,
6907 int use_existing_cu
,
6909 : die_reader_specs
{},
6912 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6913 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6914 struct dwarf2_section_info
*section
= this_cu
->section
;
6915 bfd
*abfd
= section
->get_bfd_owner ();
6916 struct dwarf2_cu
*cu
;
6917 const gdb_byte
*begin_info_ptr
;
6918 struct signatured_type
*sig_type
= NULL
;
6919 struct dwarf2_section_info
*abbrev_section
;
6920 /* Non-zero if CU currently points to a DWO file and we need to
6921 reread it. When this happens we need to reread the skeleton die
6922 before we can reread the DWO file (this only applies to CUs, not TUs). */
6923 int rereading_dwo_cu
= 0;
6925 if (dwarf_die_debug
)
6926 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
6927 this_cu
->is_debug_types
? "type" : "comp",
6928 sect_offset_str (this_cu
->sect_off
));
6930 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6931 file (instead of going through the stub), short-circuit all of this. */
6932 if (this_cu
->reading_dwo_directly
)
6934 /* Narrow down the scope of possibilities to have to understand. */
6935 gdb_assert (this_cu
->is_debug_types
);
6936 gdb_assert (abbrev_table
== NULL
);
6937 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
);
6941 /* This is cheap if the section is already read in. */
6942 section
->read (objfile
);
6944 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6946 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
6948 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6951 /* If this CU is from a DWO file we need to start over, we need to
6952 refetch the attributes from the skeleton CU.
6953 This could be optimized by retrieving those attributes from when we
6954 were here the first time: the previous comp_unit_die was stored in
6955 comp_unit_obstack. But there's no data yet that we need this
6957 if (cu
->dwo_unit
!= NULL
)
6958 rereading_dwo_cu
= 1;
6962 /* If !use_existing_cu, this_cu->cu must be NULL. */
6963 gdb_assert (this_cu
->cu
== NULL
);
6964 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6965 cu
= m_new_cu
.get ();
6968 /* Get the header. */
6969 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
6971 /* We already have the header, there's no need to read it in again. */
6972 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
6976 if (this_cu
->is_debug_types
)
6978 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6979 &cu
->header
, section
,
6980 abbrev_section
, info_ptr
,
6983 /* Since per_cu is the first member of struct signatured_type,
6984 we can go from a pointer to one to a pointer to the other. */
6985 sig_type
= (struct signatured_type
*) this_cu
;
6986 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
6987 gdb_assert (sig_type
->type_offset_in_tu
6988 == cu
->header
.type_cu_offset_in_tu
);
6989 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6991 /* LENGTH has not been set yet for type units if we're
6992 using .gdb_index. */
6993 this_cu
->length
= cu
->header
.get_length ();
6995 /* Establish the type offset that can be used to lookup the type. */
6996 sig_type
->type_offset_in_section
=
6997 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
6999 this_cu
->dwarf_version
= cu
->header
.version
;
7003 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7004 &cu
->header
, section
,
7007 rcuh_kind::COMPILE
);
7009 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7010 if (this_cu
->length
== 0)
7011 this_cu
->length
= cu
->header
.get_length ();
7013 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
7014 this_cu
->dwarf_version
= cu
->header
.version
;
7018 /* Skip dummy compilation units. */
7019 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7020 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7026 /* If we don't have them yet, read the abbrevs for this compilation unit.
7027 And if we need to read them now, make sure they're freed when we're
7029 if (abbrev_table
!= NULL
)
7030 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7033 m_abbrev_table_holder
7034 = abbrev_table::read (objfile
, abbrev_section
,
7035 cu
->header
.abbrev_sect_off
);
7036 abbrev_table
= m_abbrev_table_holder
.get ();
7039 /* Read the top level CU/TU die. */
7040 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
7041 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7043 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7049 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7050 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7051 table from the DWO file and pass the ownership over to us. It will be
7052 referenced from READER, so we must make sure to free it after we're done
7055 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7056 DWO CU, that this test will fail (the attribute will not be present). */
7057 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7058 if (dwo_name
!= nullptr)
7060 struct dwo_unit
*dwo_unit
;
7061 struct die_info
*dwo_comp_unit_die
;
7063 if (comp_unit_die
->has_children
)
7065 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7066 " has children (offset %s) [in module %s]"),
7067 sect_offset_str (this_cu
->sect_off
),
7068 bfd_get_filename (abfd
));
7070 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
, dwo_name
);
7071 if (dwo_unit
!= NULL
)
7073 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7074 comp_unit_die
, NULL
,
7077 &m_dwo_abbrev_table
) == 0)
7083 comp_unit_die
= dwo_comp_unit_die
;
7087 /* Yikes, we couldn't find the rest of the DIE, we only have
7088 the stub. A complaint has already been logged. There's
7089 not much more we can do except pass on the stub DIE to
7090 die_reader_func. We don't want to throw an error on bad
7097 cutu_reader::keep ()
7099 /* Done, clean up. */
7100 gdb_assert (!dummy_p
);
7101 if (m_new_cu
!= NULL
)
7103 struct dwarf2_per_objfile
*dwarf2_per_objfile
7104 = m_this_cu
->dwarf2_per_objfile
;
7105 /* Link this CU into read_in_chain. */
7106 m_this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
7107 dwarf2_per_objfile
->per_bfd
->read_in_chain
= m_this_cu
;
7108 /* The chain owns it now. */
7109 m_new_cu
.release ();
7113 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7114 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7115 assumed to have already done the lookup to find the DWO file).
7117 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7118 THIS_CU->is_debug_types, but nothing else.
7120 We fill in THIS_CU->length.
7122 THIS_CU->cu is always freed when done.
7123 This is done in order to not leave THIS_CU->cu in a state where we have
7124 to care whether it refers to the "main" CU or the DWO CU.
7126 When parent_cu is passed, it is used to provide a default value for
7127 str_offsets_base and addr_base from the parent. */
7129 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
7130 struct dwarf2_cu
*parent_cu
,
7131 struct dwo_file
*dwo_file
)
7132 : die_reader_specs
{},
7135 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7136 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7137 struct dwarf2_section_info
*section
= this_cu
->section
;
7138 bfd
*abfd
= section
->get_bfd_owner ();
7139 struct dwarf2_section_info
*abbrev_section
;
7140 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7142 if (dwarf_die_debug
)
7143 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7144 this_cu
->is_debug_types
? "type" : "comp",
7145 sect_offset_str (this_cu
->sect_off
));
7147 gdb_assert (this_cu
->cu
== NULL
);
7149 abbrev_section
= (dwo_file
!= NULL
7150 ? &dwo_file
->sections
.abbrev
7151 : get_abbrev_section_for_cu (this_cu
));
7153 /* This is cheap if the section is already read in. */
7154 section
->read (objfile
);
7156 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7158 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7159 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7160 &m_new_cu
->header
, section
,
7161 abbrev_section
, info_ptr
,
7162 (this_cu
->is_debug_types
7164 : rcuh_kind::COMPILE
));
7166 if (parent_cu
!= nullptr)
7168 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7169 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7171 this_cu
->length
= m_new_cu
->header
.get_length ();
7173 /* Skip dummy compilation units. */
7174 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7175 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7181 m_abbrev_table_holder
7182 = abbrev_table::read (objfile
, abbrev_section
,
7183 m_new_cu
->header
.abbrev_sect_off
);
7185 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7186 m_abbrev_table_holder
.get ());
7187 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7191 /* Type Unit Groups.
7193 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7194 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7195 so that all types coming from the same compilation (.o file) are grouped
7196 together. A future step could be to put the types in the same symtab as
7197 the CU the types ultimately came from. */
7200 hash_type_unit_group (const void *item
)
7202 const struct type_unit_group
*tu_group
7203 = (const struct type_unit_group
*) item
;
7205 return hash_stmt_list_entry (&tu_group
->hash
);
7209 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7211 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7212 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7214 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7217 /* Allocate a hash table for type unit groups. */
7220 allocate_type_unit_groups_table ()
7222 return htab_up (htab_create_alloc (3,
7223 hash_type_unit_group
,
7225 NULL
, xcalloc
, xfree
));
7228 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7229 partial symtabs. We combine several TUs per psymtab to not let the size
7230 of any one psymtab grow too big. */
7231 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7232 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7234 /* Helper routine for get_type_unit_group.
7235 Create the type_unit_group object used to hold one or more TUs. */
7237 static struct type_unit_group
*
7238 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7240 struct dwarf2_per_objfile
*dwarf2_per_objfile
7241 = cu
->per_cu
->dwarf2_per_objfile
;
7242 struct dwarf2_per_cu_data
*per_cu
;
7243 struct type_unit_group
*tu_group
;
7245 tu_group
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
7246 struct type_unit_group
);
7247 per_cu
= &tu_group
->per_cu
;
7248 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7250 if (dwarf2_per_objfile
->per_bfd
->using_index
)
7252 per_cu
->v
.quick
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
7253 struct dwarf2_per_cu_quick_data
);
7257 unsigned int line_offset
= to_underlying (line_offset_struct
);
7258 dwarf2_psymtab
*pst
;
7261 /* Give the symtab a useful name for debug purposes. */
7262 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7263 name
= string_printf ("<type_units_%d>",
7264 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7266 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7268 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7269 pst
->anonymous
= true;
7272 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7273 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7278 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7279 STMT_LIST is a DW_AT_stmt_list attribute. */
7281 static struct type_unit_group
*
7282 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7284 struct dwarf2_per_objfile
*dwarf2_per_objfile
7285 = cu
->per_cu
->dwarf2_per_objfile
;
7286 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->per_bfd
->tu_stats
;
7287 struct type_unit_group
*tu_group
;
7289 unsigned int line_offset
;
7290 struct type_unit_group type_unit_group_for_lookup
;
7292 if (dwarf2_per_objfile
->per_bfd
->type_unit_groups
== NULL
)
7293 dwarf2_per_objfile
->per_bfd
->type_unit_groups
= allocate_type_unit_groups_table ();
7295 /* Do we need to create a new group, or can we use an existing one? */
7299 line_offset
= DW_UNSND (stmt_list
);
7300 ++tu_stats
->nr_symtab_sharers
;
7304 /* Ugh, no stmt_list. Rare, but we have to handle it.
7305 We can do various things here like create one group per TU or
7306 spread them over multiple groups to split up the expansion work.
7307 To avoid worst case scenarios (too many groups or too large groups)
7308 we, umm, group them in bunches. */
7309 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7310 | (tu_stats
->nr_stmt_less_type_units
7311 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7312 ++tu_stats
->nr_stmt_less_type_units
;
7315 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7316 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7317 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->type_unit_groups
.get (),
7318 &type_unit_group_for_lookup
, INSERT
);
7321 tu_group
= (struct type_unit_group
*) *slot
;
7322 gdb_assert (tu_group
!= NULL
);
7326 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7327 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7329 ++tu_stats
->nr_symtabs
;
7335 /* Partial symbol tables. */
7337 /* Create a psymtab named NAME and assign it to PER_CU.
7339 The caller must fill in the following details:
7340 dirname, textlow, texthigh. */
7342 static dwarf2_psymtab
*
7343 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7345 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7346 dwarf2_psymtab
*pst
;
7348 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7350 pst
->psymtabs_addrmap_supported
= true;
7352 /* This is the glue that links PST into GDB's symbol API. */
7353 per_cu
->v
.psymtab
= pst
;
7358 /* DIE reader function for process_psymtab_comp_unit. */
7361 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7362 const gdb_byte
*info_ptr
,
7363 struct die_info
*comp_unit_die
,
7364 enum language pretend_language
)
7366 struct dwarf2_cu
*cu
= reader
->cu
;
7367 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7368 struct gdbarch
*gdbarch
= objfile
->arch ();
7369 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7371 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7372 dwarf2_psymtab
*pst
;
7373 enum pc_bounds_kind cu_bounds_kind
;
7374 const char *filename
;
7376 gdb_assert (! per_cu
->is_debug_types
);
7378 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7380 /* Allocate a new partial symbol table structure. */
7381 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7382 static const char artificial
[] = "<artificial>";
7383 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7384 if (filename
== NULL
)
7386 else if (strcmp (filename
, artificial
) == 0)
7388 debug_filename
.reset (concat (artificial
, "@",
7389 sect_offset_str (per_cu
->sect_off
),
7391 filename
= debug_filename
.get ();
7394 pst
= create_partial_symtab (per_cu
, filename
);
7396 /* This must be done before calling dwarf2_build_include_psymtabs. */
7397 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7399 baseaddr
= objfile
->text_section_offset ();
7401 dwarf2_find_base_address (comp_unit_die
, cu
);
7403 /* Possibly set the default values of LOWPC and HIGHPC from
7405 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7406 &best_highpc
, cu
, pst
);
7407 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7410 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7413 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7415 /* Store the contiguous range if it is not empty; it can be
7416 empty for CUs with no code. */
7417 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7421 /* Check if comp unit has_children.
7422 If so, read the rest of the partial symbols from this comp unit.
7423 If not, there's no more debug_info for this comp unit. */
7424 if (comp_unit_die
->has_children
)
7426 struct partial_die_info
*first_die
;
7427 CORE_ADDR lowpc
, highpc
;
7429 lowpc
= ((CORE_ADDR
) -1);
7430 highpc
= ((CORE_ADDR
) 0);
7432 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7434 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7435 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7437 /* If we didn't find a lowpc, set it to highpc to avoid
7438 complaints from `maint check'. */
7439 if (lowpc
== ((CORE_ADDR
) -1))
7442 /* If the compilation unit didn't have an explicit address range,
7443 then use the information extracted from its child dies. */
7444 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7447 best_highpc
= highpc
;
7450 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7451 best_lowpc
+ baseaddr
)
7453 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7454 best_highpc
+ baseaddr
)
7457 end_psymtab_common (objfile
, pst
);
7459 if (!cu
->per_cu
->imported_symtabs_empty ())
7462 int len
= cu
->per_cu
->imported_symtabs_size ();
7464 /* Fill in 'dependencies' here; we fill in 'users' in a
7466 pst
->number_of_dependencies
= len
;
7468 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7469 for (i
= 0; i
< len
; ++i
)
7471 pst
->dependencies
[i
]
7472 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7475 cu
->per_cu
->imported_symtabs_free ();
7478 /* Get the list of files included in the current compilation unit,
7479 and build a psymtab for each of them. */
7480 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7482 if (dwarf_read_debug
)
7483 fprintf_unfiltered (gdb_stdlog
,
7484 "Psymtab for %s unit @%s: %s - %s"
7485 ", %d global, %d static syms\n",
7486 per_cu
->is_debug_types
? "type" : "comp",
7487 sect_offset_str (per_cu
->sect_off
),
7488 paddress (gdbarch
, pst
->text_low (objfile
)),
7489 paddress (gdbarch
, pst
->text_high (objfile
)),
7490 pst
->n_global_syms
, pst
->n_static_syms
);
7493 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7494 Process compilation unit THIS_CU for a psymtab. */
7497 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7498 bool want_partial_unit
,
7499 enum language pretend_language
)
7501 /* If this compilation unit was already read in, free the
7502 cached copy in order to read it in again. This is
7503 necessary because we skipped some symbols when we first
7504 read in the compilation unit (see load_partial_dies).
7505 This problem could be avoided, but the benefit is unclear. */
7506 if (this_cu
->cu
!= NULL
)
7507 free_one_cached_comp_unit (this_cu
);
7509 cutu_reader
reader (this_cu
, NULL
, 0, false);
7511 switch (reader
.comp_unit_die
->tag
)
7513 case DW_TAG_compile_unit
:
7514 this_cu
->unit_type
= DW_UT_compile
;
7516 case DW_TAG_partial_unit
:
7517 this_cu
->unit_type
= DW_UT_partial
;
7527 else if (this_cu
->is_debug_types
)
7528 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7529 reader
.comp_unit_die
);
7530 else if (want_partial_unit
7531 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7532 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7533 reader
.comp_unit_die
,
7536 this_cu
->lang
= this_cu
->cu
->language
;
7538 /* Age out any secondary CUs. */
7539 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
7542 /* Reader function for build_type_psymtabs. */
7545 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7546 const gdb_byte
*info_ptr
,
7547 struct die_info
*type_unit_die
)
7549 struct dwarf2_per_objfile
*dwarf2_per_objfile
7550 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
7551 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7552 struct dwarf2_cu
*cu
= reader
->cu
;
7553 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7554 struct signatured_type
*sig_type
;
7555 struct type_unit_group
*tu_group
;
7556 struct attribute
*attr
;
7557 struct partial_die_info
*first_die
;
7558 CORE_ADDR lowpc
, highpc
;
7559 dwarf2_psymtab
*pst
;
7561 gdb_assert (per_cu
->is_debug_types
);
7562 sig_type
= (struct signatured_type
*) per_cu
;
7564 if (! type_unit_die
->has_children
)
7567 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7568 tu_group
= get_type_unit_group (cu
, attr
);
7570 if (tu_group
->tus
== nullptr)
7571 tu_group
->tus
= new std::vector
<signatured_type
*>;
7572 tu_group
->tus
->push_back (sig_type
);
7574 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7575 pst
= create_partial_symtab (per_cu
, "");
7576 pst
->anonymous
= true;
7578 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7580 lowpc
= (CORE_ADDR
) -1;
7581 highpc
= (CORE_ADDR
) 0;
7582 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7584 end_psymtab_common (objfile
, pst
);
7587 /* Struct used to sort TUs by their abbreviation table offset. */
7589 struct tu_abbrev_offset
7591 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7592 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7595 signatured_type
*sig_type
;
7596 sect_offset abbrev_offset
;
7599 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7602 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7603 const struct tu_abbrev_offset
&b
)
7605 return a
.abbrev_offset
< b
.abbrev_offset
;
7608 /* Efficiently read all the type units.
7609 This does the bulk of the work for build_type_psymtabs.
7611 The efficiency is because we sort TUs by the abbrev table they use and
7612 only read each abbrev table once. In one program there are 200K TUs
7613 sharing 8K abbrev tables.
7615 The main purpose of this function is to support building the
7616 dwarf2_per_objfile->per_bfd->type_unit_groups table.
7617 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7618 can collapse the search space by grouping them by stmt_list.
7619 The savings can be significant, in the same program from above the 200K TUs
7620 share 8K stmt_list tables.
7622 FUNC is expected to call get_type_unit_group, which will create the
7623 struct type_unit_group if necessary and add it to
7624 dwarf2_per_objfile->per_bfd->type_unit_groups. */
7627 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7629 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->per_bfd
->tu_stats
;
7630 abbrev_table_up abbrev_table
;
7631 sect_offset abbrev_offset
;
7633 /* It's up to the caller to not call us multiple times. */
7634 gdb_assert (dwarf2_per_objfile
->per_bfd
->type_unit_groups
== NULL
);
7636 if (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ())
7639 /* TUs typically share abbrev tables, and there can be way more TUs than
7640 abbrev tables. Sort by abbrev table to reduce the number of times we
7641 read each abbrev table in.
7642 Alternatives are to punt or to maintain a cache of abbrev tables.
7643 This is simpler and efficient enough for now.
7645 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7646 symtab to use). Typically TUs with the same abbrev offset have the same
7647 stmt_list value too so in practice this should work well.
7649 The basic algorithm here is:
7651 sort TUs by abbrev table
7652 for each TU with same abbrev table:
7653 read abbrev table if first user
7654 read TU top level DIE
7655 [IWBN if DWO skeletons had DW_AT_stmt_list]
7658 if (dwarf_read_debug
)
7659 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7661 /* Sort in a separate table to maintain the order of all_type_units
7662 for .gdb_index: TU indices directly index all_type_units. */
7663 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7664 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
7666 for (signatured_type
*sig_type
: dwarf2_per_objfile
->per_bfd
->all_type_units
)
7667 sorted_by_abbrev
.emplace_back
7668 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
7669 sig_type
->per_cu
.section
,
7670 sig_type
->per_cu
.sect_off
));
7672 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7673 sort_tu_by_abbrev_offset
);
7675 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7677 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7679 /* Switch to the next abbrev table if necessary. */
7680 if (abbrev_table
== NULL
7681 || tu
.abbrev_offset
!= abbrev_offset
)
7683 abbrev_offset
= tu
.abbrev_offset
;
7685 abbrev_table::read (dwarf2_per_objfile
->objfile
,
7686 &dwarf2_per_objfile
->per_bfd
->abbrev
,
7688 ++tu_stats
->nr_uniq_abbrev_tables
;
7691 cutu_reader
reader (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
7693 if (!reader
.dummy_p
)
7694 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7695 reader
.comp_unit_die
);
7699 /* Print collected type unit statistics. */
7702 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7704 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->per_bfd
->tu_stats
;
7706 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7707 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
7708 dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
7709 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7710 tu_stats
->nr_uniq_abbrev_tables
);
7711 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7712 tu_stats
->nr_symtabs
);
7713 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7714 tu_stats
->nr_symtab_sharers
);
7715 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7716 tu_stats
->nr_stmt_less_type_units
);
7717 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7718 tu_stats
->nr_all_type_units_reallocs
);
7721 /* Traversal function for build_type_psymtabs. */
7724 build_type_psymtab_dependencies (void **slot
, void *info
)
7726 struct dwarf2_per_objfile
*dwarf2_per_objfile
7727 = (struct dwarf2_per_objfile
*) info
;
7728 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7729 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7730 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7731 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7732 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
7735 gdb_assert (len
> 0);
7736 gdb_assert (per_cu
->type_unit_group_p ());
7738 pst
->number_of_dependencies
= len
;
7739 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
7740 for (i
= 0; i
< len
; ++i
)
7742 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
7743 gdb_assert (iter
->per_cu
.is_debug_types
);
7744 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7745 iter
->type_unit_group
= tu_group
;
7748 delete tu_group
->tus
;
7749 tu_group
->tus
= nullptr;
7754 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7755 Build partial symbol tables for the .debug_types comp-units. */
7758 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7760 if (! create_all_type_units (dwarf2_per_objfile
))
7763 build_type_psymtabs_1 (dwarf2_per_objfile
);
7766 /* Traversal function for process_skeletonless_type_unit.
7767 Read a TU in a DWO file and build partial symbols for it. */
7770 process_skeletonless_type_unit (void **slot
, void *info
)
7772 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7773 struct dwarf2_per_objfile
*dwarf2_per_objfile
7774 = (struct dwarf2_per_objfile
*) info
;
7775 struct signatured_type find_entry
, *entry
;
7777 /* If this TU doesn't exist in the global table, add it and read it in. */
7779 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
7780 dwarf2_per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
7782 find_entry
.signature
= dwo_unit
->signature
;
7783 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
7784 &find_entry
, INSERT
);
7785 /* If we've already seen this type there's nothing to do. What's happening
7786 is we're doing our own version of comdat-folding here. */
7790 /* This does the job that create_all_type_units would have done for
7792 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
7793 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
7796 /* This does the job that build_type_psymtabs_1 would have done. */
7797 cutu_reader
reader (&entry
->per_cu
, NULL
, 0, false);
7798 if (!reader
.dummy_p
)
7799 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7800 reader
.comp_unit_die
);
7805 /* Traversal function for process_skeletonless_type_units. */
7808 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7810 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7812 if (dwo_file
->tus
!= NULL
)
7813 htab_traverse_noresize (dwo_file
->tus
.get (),
7814 process_skeletonless_type_unit
, info
);
7819 /* Scan all TUs of DWO files, verifying we've processed them.
7820 This is needed in case a TU was emitted without its skeleton.
7821 Note: This can't be done until we know what all the DWO files are. */
7824 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7826 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7827 if (get_dwp_file (dwarf2_per_objfile
) == NULL
7828 && dwarf2_per_objfile
->per_bfd
->dwo_files
!= NULL
)
7830 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->dwo_files
.get (),
7831 process_dwo_file_for_skeletonless_type_units
,
7832 dwarf2_per_objfile
);
7836 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
7839 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7841 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
7843 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7848 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7850 /* Set the 'user' field only if it is not already set. */
7851 if (pst
->dependencies
[j
]->user
== NULL
)
7852 pst
->dependencies
[j
]->user
= pst
;
7857 /* Build the partial symbol table by doing a quick pass through the
7858 .debug_info and .debug_abbrev sections. */
7861 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7863 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7865 if (dwarf_read_debug
)
7867 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7868 objfile_name (objfile
));
7871 scoped_restore restore_reading_psyms
7872 = make_scoped_restore (&dwarf2_per_objfile
->per_bfd
->reading_partial_symbols
,
7875 dwarf2_per_objfile
->per_bfd
->info
.read (objfile
);
7877 /* Any cached compilation units will be linked by the per-objfile
7878 read_in_chain. Make sure to free them when we're done. */
7879 free_cached_comp_units
freer (dwarf2_per_objfile
);
7881 build_type_psymtabs (dwarf2_per_objfile
);
7883 create_all_comp_units (dwarf2_per_objfile
);
7885 /* Create a temporary address map on a temporary obstack. We later
7886 copy this to the final obstack. */
7887 auto_obstack temp_obstack
;
7889 scoped_restore save_psymtabs_addrmap
7890 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
7891 addrmap_create_mutable (&temp_obstack
));
7893 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
7895 if (per_cu
->v
.psymtab
!= NULL
)
7896 /* In case a forward DW_TAG_imported_unit has read the CU already. */
7898 process_psymtab_comp_unit (per_cu
, false, language_minimal
);
7901 /* This has to wait until we read the CUs, we need the list of DWOs. */
7902 process_skeletonless_type_units (dwarf2_per_objfile
);
7904 /* Now that all TUs have been processed we can fill in the dependencies. */
7905 if (dwarf2_per_objfile
->per_bfd
->type_unit_groups
!= NULL
)
7907 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->type_unit_groups
.get (),
7908 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
7911 if (dwarf_read_debug
)
7912 print_tu_stats (dwarf2_per_objfile
);
7914 set_partial_user (dwarf2_per_objfile
);
7916 objfile
->partial_symtabs
->psymtabs_addrmap
7917 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
7918 objfile
->partial_symtabs
->obstack ());
7919 /* At this point we want to keep the address map. */
7920 save_psymtabs_addrmap
.release ();
7922 if (dwarf_read_debug
)
7923 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7924 objfile_name (objfile
));
7927 /* Load the partial DIEs for a secondary CU into memory.
7928 This is also used when rereading a primary CU with load_all_dies. */
7931 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
7933 cutu_reader
reader (this_cu
, NULL
, 1, false);
7935 if (!reader
.dummy_p
)
7937 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
7940 /* Check if comp unit has_children.
7941 If so, read the rest of the partial symbols from this comp unit.
7942 If not, there's no more debug_info for this comp unit. */
7943 if (reader
.comp_unit_die
->has_children
)
7944 load_partial_dies (&reader
, reader
.info_ptr
, 0);
7951 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
7952 struct dwarf2_section_info
*section
,
7953 struct dwarf2_section_info
*abbrev_section
,
7954 unsigned int is_dwz
)
7956 const gdb_byte
*info_ptr
;
7957 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7959 if (dwarf_read_debug
)
7960 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
7961 section
->get_name (),
7962 section
->get_file_name ());
7964 section
->read (objfile
);
7966 info_ptr
= section
->buffer
;
7968 while (info_ptr
< section
->buffer
+ section
->size
)
7970 struct dwarf2_per_cu_data
*this_cu
;
7972 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
7974 comp_unit_head cu_header
;
7975 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
7976 abbrev_section
, info_ptr
,
7977 rcuh_kind::COMPILE
);
7979 /* Save the compilation unit for later lookup. */
7980 if (cu_header
.unit_type
!= DW_UT_type
)
7981 this_cu
= dwarf2_per_objfile
->per_bfd
->allocate_per_cu ();
7984 auto sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
7985 sig_type
->signature
= cu_header
.signature
;
7986 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
7987 this_cu
= &sig_type
->per_cu
;
7989 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
7990 this_cu
->sect_off
= sect_off
;
7991 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
7992 this_cu
->is_dwz
= is_dwz
;
7993 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7994 this_cu
->section
= section
;
7996 dwarf2_per_objfile
->per_bfd
->all_comp_units
.push_back (this_cu
);
7998 info_ptr
= info_ptr
+ this_cu
->length
;
8002 /* Create a list of all compilation units in OBJFILE.
8003 This is only done for -readnow and building partial symtabs. */
8006 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8008 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_comp_units
.empty ());
8009 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->per_bfd
->info
,
8010 &dwarf2_per_objfile
->per_bfd
->abbrev
, 0);
8012 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8014 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8018 /* Process all loaded DIEs for compilation unit CU, starting at
8019 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8020 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8021 DW_AT_ranges). See the comments of add_partial_subprogram on how
8022 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8025 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8026 CORE_ADDR
*highpc
, int set_addrmap
,
8027 struct dwarf2_cu
*cu
)
8029 struct partial_die_info
*pdi
;
8031 /* Now, march along the PDI's, descending into ones which have
8032 interesting children but skipping the children of the other ones,
8033 until we reach the end of the compilation unit. */
8041 /* Anonymous namespaces or modules have no name but have interesting
8042 children, so we need to look at them. Ditto for anonymous
8045 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8046 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8047 || pdi
->tag
== DW_TAG_imported_unit
8048 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8052 case DW_TAG_subprogram
:
8053 case DW_TAG_inlined_subroutine
:
8054 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8056 case DW_TAG_constant
:
8057 case DW_TAG_variable
:
8058 case DW_TAG_typedef
:
8059 case DW_TAG_union_type
:
8060 if (!pdi
->is_declaration
8061 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
8063 add_partial_symbol (pdi
, cu
);
8066 case DW_TAG_class_type
:
8067 case DW_TAG_interface_type
:
8068 case DW_TAG_structure_type
:
8069 if (!pdi
->is_declaration
)
8071 add_partial_symbol (pdi
, cu
);
8073 if ((cu
->language
== language_rust
8074 || cu
->language
== language_cplus
) && pdi
->has_children
)
8075 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8078 case DW_TAG_enumeration_type
:
8079 if (!pdi
->is_declaration
)
8080 add_partial_enumeration (pdi
, cu
);
8082 case DW_TAG_base_type
:
8083 case DW_TAG_subrange_type
:
8084 /* File scope base type definitions are added to the partial
8086 add_partial_symbol (pdi
, cu
);
8088 case DW_TAG_namespace
:
8089 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8092 if (!pdi
->is_declaration
)
8093 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8095 case DW_TAG_imported_unit
:
8097 struct dwarf2_per_cu_data
*per_cu
;
8099 /* For now we don't handle imported units in type units. */
8100 if (cu
->per_cu
->is_debug_types
)
8102 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8103 " supported in type units [in module %s]"),
8104 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8107 per_cu
= dwarf2_find_containing_comp_unit
8108 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8109 cu
->per_cu
->dwarf2_per_objfile
);
8111 /* Go read the partial unit, if needed. */
8112 if (per_cu
->v
.psymtab
== NULL
)
8113 process_psymtab_comp_unit (per_cu
, true, cu
->language
);
8115 cu
->per_cu
->imported_symtabs_push (per_cu
);
8118 case DW_TAG_imported_declaration
:
8119 add_partial_symbol (pdi
, cu
);
8126 /* If the die has a sibling, skip to the sibling. */
8128 pdi
= pdi
->die_sibling
;
8132 /* Functions used to compute the fully scoped name of a partial DIE.
8134 Normally, this is simple. For C++, the parent DIE's fully scoped
8135 name is concatenated with "::" and the partial DIE's name.
8136 Enumerators are an exception; they use the scope of their parent
8137 enumeration type, i.e. the name of the enumeration type is not
8138 prepended to the enumerator.
8140 There are two complexities. One is DW_AT_specification; in this
8141 case "parent" means the parent of the target of the specification,
8142 instead of the direct parent of the DIE. The other is compilers
8143 which do not emit DW_TAG_namespace; in this case we try to guess
8144 the fully qualified name of structure types from their members'
8145 linkage names. This must be done using the DIE's children rather
8146 than the children of any DW_AT_specification target. We only need
8147 to do this for structures at the top level, i.e. if the target of
8148 any DW_AT_specification (if any; otherwise the DIE itself) does not
8151 /* Compute the scope prefix associated with PDI's parent, in
8152 compilation unit CU. The result will be allocated on CU's
8153 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8154 field. NULL is returned if no prefix is necessary. */
8156 partial_die_parent_scope (struct partial_die_info
*pdi
,
8157 struct dwarf2_cu
*cu
)
8159 const char *grandparent_scope
;
8160 struct partial_die_info
*parent
, *real_pdi
;
8162 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8163 then this means the parent of the specification DIE. */
8166 while (real_pdi
->has_specification
)
8168 auto res
= find_partial_die (real_pdi
->spec_offset
,
8169 real_pdi
->spec_is_dwz
, cu
);
8174 parent
= real_pdi
->die_parent
;
8178 if (parent
->scope_set
)
8179 return parent
->scope
;
8183 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8185 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8186 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8187 Work around this problem here. */
8188 if (cu
->language
== language_cplus
8189 && parent
->tag
== DW_TAG_namespace
8190 && strcmp (parent
->name
, "::") == 0
8191 && grandparent_scope
== NULL
)
8193 parent
->scope
= NULL
;
8194 parent
->scope_set
= 1;
8198 /* Nested subroutines in Fortran get a prefix. */
8199 if (pdi
->tag
== DW_TAG_enumerator
)
8200 /* Enumerators should not get the name of the enumeration as a prefix. */
8201 parent
->scope
= grandparent_scope
;
8202 else if (parent
->tag
== DW_TAG_namespace
8203 || parent
->tag
== DW_TAG_module
8204 || parent
->tag
== DW_TAG_structure_type
8205 || parent
->tag
== DW_TAG_class_type
8206 || parent
->tag
== DW_TAG_interface_type
8207 || parent
->tag
== DW_TAG_union_type
8208 || parent
->tag
== DW_TAG_enumeration_type
8209 || (cu
->language
== language_fortran
8210 && parent
->tag
== DW_TAG_subprogram
8211 && pdi
->tag
== DW_TAG_subprogram
))
8213 if (grandparent_scope
== NULL
)
8214 parent
->scope
= parent
->name
;
8216 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8218 parent
->name
, 0, cu
);
8222 /* FIXME drow/2004-04-01: What should we be doing with
8223 function-local names? For partial symbols, we should probably be
8225 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8226 dwarf_tag_name (parent
->tag
),
8227 sect_offset_str (pdi
->sect_off
));
8228 parent
->scope
= grandparent_scope
;
8231 parent
->scope_set
= 1;
8232 return parent
->scope
;
8235 /* Return the fully scoped name associated with PDI, from compilation unit
8236 CU. The result will be allocated with malloc. */
8238 static gdb::unique_xmalloc_ptr
<char>
8239 partial_die_full_name (struct partial_die_info
*pdi
,
8240 struct dwarf2_cu
*cu
)
8242 const char *parent_scope
;
8244 /* If this is a template instantiation, we can not work out the
8245 template arguments from partial DIEs. So, unfortunately, we have
8246 to go through the full DIEs. At least any work we do building
8247 types here will be reused if full symbols are loaded later. */
8248 if (pdi
->has_template_arguments
)
8252 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8254 struct die_info
*die
;
8255 struct attribute attr
;
8256 struct dwarf2_cu
*ref_cu
= cu
;
8258 /* DW_FORM_ref_addr is using section offset. */
8259 attr
.name
= (enum dwarf_attribute
) 0;
8260 attr
.form
= DW_FORM_ref_addr
;
8261 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8262 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8264 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8268 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8269 if (parent_scope
== NULL
)
8272 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8277 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8279 struct dwarf2_per_objfile
*dwarf2_per_objfile
8280 = cu
->per_cu
->dwarf2_per_objfile
;
8281 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8282 struct gdbarch
*gdbarch
= objfile
->arch ();
8284 const char *actual_name
= NULL
;
8287 baseaddr
= objfile
->text_section_offset ();
8289 gdb::unique_xmalloc_ptr
<char> built_actual_name
8290 = partial_die_full_name (pdi
, cu
);
8291 if (built_actual_name
!= NULL
)
8292 actual_name
= built_actual_name
.get ();
8294 if (actual_name
== NULL
)
8295 actual_name
= pdi
->name
;
8297 partial_symbol psymbol
;
8298 memset (&psymbol
, 0, sizeof (psymbol
));
8299 psymbol
.ginfo
.set_language (cu
->language
, &objfile
->objfile_obstack
);
8300 psymbol
.ginfo
.section
= -1;
8302 /* The code below indicates that the psymbol should be installed by
8304 gdb::optional
<psymbol_placement
> where
;
8308 case DW_TAG_inlined_subroutine
:
8309 case DW_TAG_subprogram
:
8310 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8312 if (pdi
->is_external
8313 || cu
->language
== language_ada
8314 || (cu
->language
== language_fortran
8315 && pdi
->die_parent
!= NULL
8316 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8318 /* Normally, only "external" DIEs are part of the global scope.
8319 But in Ada and Fortran, we want to be able to access nested
8320 procedures globally. So all Ada and Fortran subprograms are
8321 stored in the global scope. */
8322 where
= psymbol_placement::GLOBAL
;
8325 where
= psymbol_placement::STATIC
;
8327 psymbol
.domain
= VAR_DOMAIN
;
8328 psymbol
.aclass
= LOC_BLOCK
;
8329 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8330 psymbol
.ginfo
.value
.address
= addr
;
8332 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8333 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8335 case DW_TAG_constant
:
8336 psymbol
.domain
= VAR_DOMAIN
;
8337 psymbol
.aclass
= LOC_STATIC
;
8338 where
= (pdi
->is_external
8339 ? psymbol_placement::GLOBAL
8340 : psymbol_placement::STATIC
);
8342 case DW_TAG_variable
:
8344 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8348 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
8350 /* A global or static variable may also have been stripped
8351 out by the linker if unused, in which case its address
8352 will be nullified; do not add such variables into partial
8353 symbol table then. */
8355 else if (pdi
->is_external
)
8358 Don't enter into the minimal symbol tables as there is
8359 a minimal symbol table entry from the ELF symbols already.
8360 Enter into partial symbol table if it has a location
8361 descriptor or a type.
8362 If the location descriptor is missing, new_symbol will create
8363 a LOC_UNRESOLVED symbol, the address of the variable will then
8364 be determined from the minimal symbol table whenever the variable
8366 The address for the partial symbol table entry is not
8367 used by GDB, but it comes in handy for debugging partial symbol
8370 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8372 psymbol
.domain
= VAR_DOMAIN
;
8373 psymbol
.aclass
= LOC_STATIC
;
8374 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8375 psymbol
.ginfo
.value
.address
= addr
;
8376 where
= psymbol_placement::GLOBAL
;
8381 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8383 /* Static Variable. Skip symbols whose value we cannot know (those
8384 without location descriptors or constant values). */
8385 if (!has_loc
&& !pdi
->has_const_value
)
8388 psymbol
.domain
= VAR_DOMAIN
;
8389 psymbol
.aclass
= LOC_STATIC
;
8390 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8392 psymbol
.ginfo
.value
.address
= addr
;
8393 where
= psymbol_placement::STATIC
;
8396 case DW_TAG_typedef
:
8397 case DW_TAG_base_type
:
8398 case DW_TAG_subrange_type
:
8399 psymbol
.domain
= VAR_DOMAIN
;
8400 psymbol
.aclass
= LOC_TYPEDEF
;
8401 where
= psymbol_placement::STATIC
;
8403 case DW_TAG_imported_declaration
:
8404 case DW_TAG_namespace
:
8405 psymbol
.domain
= VAR_DOMAIN
;
8406 psymbol
.aclass
= LOC_TYPEDEF
;
8407 where
= psymbol_placement::GLOBAL
;
8410 /* With Fortran 77 there might be a "BLOCK DATA" module
8411 available without any name. If so, we skip the module as it
8412 doesn't bring any value. */
8413 if (actual_name
!= nullptr)
8415 psymbol
.domain
= MODULE_DOMAIN
;
8416 psymbol
.aclass
= LOC_TYPEDEF
;
8417 where
= psymbol_placement::GLOBAL
;
8420 case DW_TAG_class_type
:
8421 case DW_TAG_interface_type
:
8422 case DW_TAG_structure_type
:
8423 case DW_TAG_union_type
:
8424 case DW_TAG_enumeration_type
:
8425 /* Skip external references. The DWARF standard says in the section
8426 about "Structure, Union, and Class Type Entries": "An incomplete
8427 structure, union or class type is represented by a structure,
8428 union or class entry that does not have a byte size attribute
8429 and that has a DW_AT_declaration attribute." */
8430 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8433 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8434 static vs. global. */
8435 psymbol
.domain
= STRUCT_DOMAIN
;
8436 psymbol
.aclass
= LOC_TYPEDEF
;
8437 where
= (cu
->language
== language_cplus
8438 ? psymbol_placement::GLOBAL
8439 : psymbol_placement::STATIC
);
8441 case DW_TAG_enumerator
:
8442 psymbol
.domain
= VAR_DOMAIN
;
8443 psymbol
.aclass
= LOC_CONST
;
8444 where
= (cu
->language
== language_cplus
8445 ? psymbol_placement::GLOBAL
8446 : psymbol_placement::STATIC
);
8452 if (where
.has_value ())
8454 if (built_actual_name
!= nullptr)
8455 actual_name
= objfile
->intern (actual_name
);
8456 if (pdi
->linkage_name
== nullptr || cu
->language
== language_ada
)
8457 psymbol
.ginfo
.set_linkage_name (actual_name
);
8460 psymbol
.ginfo
.set_demangled_name (actual_name
,
8461 &objfile
->objfile_obstack
);
8462 psymbol
.ginfo
.set_linkage_name (pdi
->linkage_name
);
8464 add_psymbol_to_list (psymbol
, *where
, objfile
);
8468 /* Read a partial die corresponding to a namespace; also, add a symbol
8469 corresponding to that namespace to the symbol table. NAMESPACE is
8470 the name of the enclosing namespace. */
8473 add_partial_namespace (struct partial_die_info
*pdi
,
8474 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8475 int set_addrmap
, struct dwarf2_cu
*cu
)
8477 /* Add a symbol for the namespace. */
8479 add_partial_symbol (pdi
, cu
);
8481 /* Now scan partial symbols in that namespace. */
8483 if (pdi
->has_children
)
8484 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8487 /* Read a partial die corresponding to a Fortran module. */
8490 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8491 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8493 /* Add a symbol for the namespace. */
8495 add_partial_symbol (pdi
, cu
);
8497 /* Now scan partial symbols in that module. */
8499 if (pdi
->has_children
)
8500 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8503 /* Read a partial die corresponding to a subprogram or an inlined
8504 subprogram and create a partial symbol for that subprogram.
8505 When the CU language allows it, this routine also defines a partial
8506 symbol for each nested subprogram that this subprogram contains.
8507 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8508 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8510 PDI may also be a lexical block, in which case we simply search
8511 recursively for subprograms defined inside that lexical block.
8512 Again, this is only performed when the CU language allows this
8513 type of definitions. */
8516 add_partial_subprogram (struct partial_die_info
*pdi
,
8517 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8518 int set_addrmap
, struct dwarf2_cu
*cu
)
8520 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8522 if (pdi
->has_pc_info
)
8524 if (pdi
->lowpc
< *lowpc
)
8525 *lowpc
= pdi
->lowpc
;
8526 if (pdi
->highpc
> *highpc
)
8527 *highpc
= pdi
->highpc
;
8530 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
8531 struct gdbarch
*gdbarch
= objfile
->arch ();
8533 CORE_ADDR this_highpc
;
8534 CORE_ADDR this_lowpc
;
8536 baseaddr
= objfile
->text_section_offset ();
8538 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8539 pdi
->lowpc
+ baseaddr
)
8542 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8543 pdi
->highpc
+ baseaddr
)
8545 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8546 this_lowpc
, this_highpc
- 1,
8547 cu
->per_cu
->v
.psymtab
);
8551 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8553 if (!pdi
->is_declaration
)
8554 /* Ignore subprogram DIEs that do not have a name, they are
8555 illegal. Do not emit a complaint at this point, we will
8556 do so when we convert this psymtab into a symtab. */
8558 add_partial_symbol (pdi
, cu
);
8562 if (! pdi
->has_children
)
8565 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8567 pdi
= pdi
->die_child
;
8571 if (pdi
->tag
== DW_TAG_subprogram
8572 || pdi
->tag
== DW_TAG_inlined_subroutine
8573 || pdi
->tag
== DW_TAG_lexical_block
)
8574 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8575 pdi
= pdi
->die_sibling
;
8580 /* Read a partial die corresponding to an enumeration type. */
8583 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8584 struct dwarf2_cu
*cu
)
8586 struct partial_die_info
*pdi
;
8588 if (enum_pdi
->name
!= NULL
)
8589 add_partial_symbol (enum_pdi
, cu
);
8591 pdi
= enum_pdi
->die_child
;
8594 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8595 complaint (_("malformed enumerator DIE ignored"));
8597 add_partial_symbol (pdi
, cu
);
8598 pdi
= pdi
->die_sibling
;
8602 /* Return the initial uleb128 in the die at INFO_PTR. */
8605 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8607 unsigned int bytes_read
;
8609 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8612 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8613 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8615 Return the corresponding abbrev, or NULL if the number is zero (indicating
8616 an empty DIE). In either case *BYTES_READ will be set to the length of
8617 the initial number. */
8619 static struct abbrev_info
*
8620 peek_die_abbrev (const die_reader_specs
&reader
,
8621 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8623 dwarf2_cu
*cu
= reader
.cu
;
8624 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
8625 unsigned int abbrev_number
8626 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8628 if (abbrev_number
== 0)
8631 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8634 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8635 " at offset %s [in module %s]"),
8636 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8637 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8643 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8644 Returns a pointer to the end of a series of DIEs, terminated by an empty
8645 DIE. Any children of the skipped DIEs will also be skipped. */
8647 static const gdb_byte
*
8648 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8652 unsigned int bytes_read
;
8653 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8656 return info_ptr
+ bytes_read
;
8658 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8662 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8663 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8664 abbrev corresponding to that skipped uleb128 should be passed in
8665 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8668 static const gdb_byte
*
8669 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8670 struct abbrev_info
*abbrev
)
8672 unsigned int bytes_read
;
8673 struct attribute attr
;
8674 bfd
*abfd
= reader
->abfd
;
8675 struct dwarf2_cu
*cu
= reader
->cu
;
8676 const gdb_byte
*buffer
= reader
->buffer
;
8677 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8678 unsigned int form
, i
;
8680 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8682 /* The only abbrev we care about is DW_AT_sibling. */
8683 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8686 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
,
8688 if (attr
.form
== DW_FORM_ref_addr
)
8689 complaint (_("ignoring absolute DW_AT_sibling"));
8692 sect_offset off
= attr
.get_ref_die_offset ();
8693 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8695 if (sibling_ptr
< info_ptr
)
8696 complaint (_("DW_AT_sibling points backwards"));
8697 else if (sibling_ptr
> reader
->buffer_end
)
8698 reader
->die_section
->overflow_complaint ();
8704 /* If it isn't DW_AT_sibling, skip this attribute. */
8705 form
= abbrev
->attrs
[i
].form
;
8709 case DW_FORM_ref_addr
:
8710 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8711 and later it is offset sized. */
8712 if (cu
->header
.version
== 2)
8713 info_ptr
+= cu
->header
.addr_size
;
8715 info_ptr
+= cu
->header
.offset_size
;
8717 case DW_FORM_GNU_ref_alt
:
8718 info_ptr
+= cu
->header
.offset_size
;
8721 info_ptr
+= cu
->header
.addr_size
;
8729 case DW_FORM_flag_present
:
8730 case DW_FORM_implicit_const
:
8747 case DW_FORM_ref_sig8
:
8750 case DW_FORM_data16
:
8753 case DW_FORM_string
:
8754 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8755 info_ptr
+= bytes_read
;
8757 case DW_FORM_sec_offset
:
8759 case DW_FORM_GNU_strp_alt
:
8760 info_ptr
+= cu
->header
.offset_size
;
8762 case DW_FORM_exprloc
:
8764 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8765 info_ptr
+= bytes_read
;
8767 case DW_FORM_block1
:
8768 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8770 case DW_FORM_block2
:
8771 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8773 case DW_FORM_block4
:
8774 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8780 case DW_FORM_ref_udata
:
8781 case DW_FORM_GNU_addr_index
:
8782 case DW_FORM_GNU_str_index
:
8783 case DW_FORM_rnglistx
:
8784 case DW_FORM_loclistx
:
8785 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8787 case DW_FORM_indirect
:
8788 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8789 info_ptr
+= bytes_read
;
8790 /* We need to continue parsing from here, so just go back to
8792 goto skip_attribute
;
8795 error (_("Dwarf Error: Cannot handle %s "
8796 "in DWARF reader [in module %s]"),
8797 dwarf_form_name (form
),
8798 bfd_get_filename (abfd
));
8802 if (abbrev
->has_children
)
8803 return skip_children (reader
, info_ptr
);
8808 /* Locate ORIG_PDI's sibling.
8809 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8811 static const gdb_byte
*
8812 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8813 struct partial_die_info
*orig_pdi
,
8814 const gdb_byte
*info_ptr
)
8816 /* Do we know the sibling already? */
8818 if (orig_pdi
->sibling
)
8819 return orig_pdi
->sibling
;
8821 /* Are there any children to deal with? */
8823 if (!orig_pdi
->has_children
)
8826 /* Skip the children the long way. */
8828 return skip_children (reader
, info_ptr
);
8831 /* Expand this partial symbol table into a full symbol table. SELF is
8835 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
8837 struct dwarf2_per_objfile
*dwarf2_per_objfile
8838 = get_dwarf2_per_objfile (objfile
);
8840 gdb_assert (!readin
);
8841 /* If this psymtab is constructed from a debug-only objfile, the
8842 has_section_at_zero flag will not necessarily be correct. We
8843 can get the correct value for this flag by looking at the data
8844 associated with the (presumably stripped) associated objfile. */
8845 if (objfile
->separate_debug_objfile_backlink
)
8847 struct dwarf2_per_objfile
*dpo_backlink
8848 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
8850 dwarf2_per_objfile
->per_bfd
->has_section_at_zero
8851 = dpo_backlink
->per_bfd
->has_section_at_zero
;
8854 expand_psymtab (objfile
);
8856 process_cu_includes (dwarf2_per_objfile
);
8859 /* Reading in full CUs. */
8861 /* Add PER_CU to the queue. */
8864 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8865 enum language pretend_language
)
8868 per_cu
->dwarf2_per_objfile
->per_bfd
->queue
.emplace (per_cu
, pretend_language
);
8871 /* If PER_CU is not yet queued, add it to the queue.
8872 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
8874 The result is non-zero if PER_CU was queued, otherwise the result is zero
8875 meaning either PER_CU is already queued or it is already loaded.
8877 N.B. There is an invariant here that if a CU is queued then it is loaded.
8878 The caller is required to load PER_CU if we return non-zero. */
8881 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
8882 struct dwarf2_per_cu_data
*per_cu
,
8883 enum language pretend_language
)
8885 /* We may arrive here during partial symbol reading, if we need full
8886 DIEs to process an unusual case (e.g. template arguments). Do
8887 not queue PER_CU, just tell our caller to load its DIEs. */
8888 if (per_cu
->dwarf2_per_objfile
->per_bfd
->reading_partial_symbols
)
8890 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
8895 /* Mark the dependence relation so that we don't flush PER_CU
8897 if (dependent_cu
!= NULL
)
8898 dwarf2_add_dependence (dependent_cu
, per_cu
);
8900 /* If it's already on the queue, we have nothing to do. */
8904 /* If the compilation unit is already loaded, just mark it as
8906 if (per_cu
->cu
!= NULL
)
8908 per_cu
->cu
->last_used
= 0;
8912 /* Add it to the queue. */
8913 queue_comp_unit (per_cu
, pretend_language
);
8918 /* Process the queue. */
8921 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8923 if (dwarf_read_debug
)
8925 fprintf_unfiltered (gdb_stdlog
,
8926 "Expanding one or more symtabs of objfile %s ...\n",
8927 objfile_name (dwarf2_per_objfile
->objfile
));
8930 /* The queue starts out with one item, but following a DIE reference
8931 may load a new CU, adding it to the end of the queue. */
8932 while (!dwarf2_per_objfile
->per_bfd
->queue
.empty ())
8934 dwarf2_queue_item
&item
= dwarf2_per_objfile
->per_bfd
->queue
.front ();
8936 if ((dwarf2_per_objfile
->per_bfd
->using_index
8937 ? !item
.per_cu
->v
.quick
->compunit_symtab
8938 : (item
.per_cu
->v
.psymtab
&& !item
.per_cu
->v
.psymtab
->readin
))
8939 /* Skip dummy CUs. */
8940 && item
.per_cu
->cu
!= NULL
)
8942 struct dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
8943 unsigned int debug_print_threshold
;
8946 if (per_cu
->is_debug_types
)
8948 struct signatured_type
*sig_type
=
8949 (struct signatured_type
*) per_cu
;
8951 sprintf (buf
, "TU %s at offset %s",
8952 hex_string (sig_type
->signature
),
8953 sect_offset_str (per_cu
->sect_off
));
8954 /* There can be 100s of TUs.
8955 Only print them in verbose mode. */
8956 debug_print_threshold
= 2;
8960 sprintf (buf
, "CU at offset %s",
8961 sect_offset_str (per_cu
->sect_off
));
8962 debug_print_threshold
= 1;
8965 if (dwarf_read_debug
>= debug_print_threshold
)
8966 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
8968 if (per_cu
->is_debug_types
)
8969 process_full_type_unit (per_cu
, item
.pretend_language
);
8971 process_full_comp_unit (per_cu
, item
.pretend_language
);
8973 if (dwarf_read_debug
>= debug_print_threshold
)
8974 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
8977 item
.per_cu
->queued
= 0;
8978 dwarf2_per_objfile
->per_bfd
->queue
.pop ();
8981 if (dwarf_read_debug
)
8983 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
8984 objfile_name (dwarf2_per_objfile
->objfile
));
8988 /* Read in full symbols for PST, and anything it depends on. */
8991 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
8993 gdb_assert (!readin
);
8995 expand_dependencies (objfile
);
8997 dw2_do_instantiate_symtab (per_cu_data
, false);
8998 gdb_assert (get_compunit_symtab (objfile
) != nullptr);
9001 /* Trivial hash function for die_info: the hash value of a DIE
9002 is its offset in .debug_info for this objfile. */
9005 die_hash (const void *item
)
9007 const struct die_info
*die
= (const struct die_info
*) item
;
9009 return to_underlying (die
->sect_off
);
9012 /* Trivial comparison function for die_info structures: two DIEs
9013 are equal if they have the same offset. */
9016 die_eq (const void *item_lhs
, const void *item_rhs
)
9018 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9019 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9021 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9024 /* Load the DIEs associated with PER_CU into memory. */
9027 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9029 enum language pretend_language
)
9031 gdb_assert (! this_cu
->is_debug_types
);
9033 cutu_reader
reader (this_cu
, NULL
, 1, skip_partial
);
9037 struct dwarf2_cu
*cu
= reader
.cu
;
9038 const gdb_byte
*info_ptr
= reader
.info_ptr
;
9040 gdb_assert (cu
->die_hash
== NULL
);
9042 htab_create_alloc_ex (cu
->header
.length
/ 12,
9046 &cu
->comp_unit_obstack
,
9047 hashtab_obstack_allocate
,
9048 dummy_obstack_deallocate
);
9050 if (reader
.comp_unit_die
->has_children
)
9051 reader
.comp_unit_die
->child
9052 = read_die_and_siblings (&reader
, reader
.info_ptr
,
9053 &info_ptr
, reader
.comp_unit_die
);
9054 cu
->dies
= reader
.comp_unit_die
;
9055 /* comp_unit_die is not stored in die_hash, no need. */
9057 /* We try not to read any attributes in this function, because not
9058 all CUs needed for references have been loaded yet, and symbol
9059 table processing isn't initialized. But we have to set the CU language,
9060 or we won't be able to build types correctly.
9061 Similarly, if we do not read the producer, we can not apply
9062 producer-specific interpretation. */
9063 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
9068 /* Add a DIE to the delayed physname list. */
9071 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9072 const char *name
, struct die_info
*die
,
9073 struct dwarf2_cu
*cu
)
9075 struct delayed_method_info mi
;
9077 mi
.fnfield_index
= fnfield_index
;
9081 cu
->method_list
.push_back (mi
);
9084 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9085 "const" / "volatile". If so, decrements LEN by the length of the
9086 modifier and return true. Otherwise return false. */
9090 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9092 size_t mod_len
= sizeof (mod
) - 1;
9093 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9101 /* Compute the physnames of any methods on the CU's method list.
9103 The computation of method physnames is delayed in order to avoid the
9104 (bad) condition that one of the method's formal parameters is of an as yet
9108 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9110 /* Only C++ delays computing physnames. */
9111 if (cu
->method_list
.empty ())
9113 gdb_assert (cu
->language
== language_cplus
);
9115 for (const delayed_method_info
&mi
: cu
->method_list
)
9117 const char *physname
;
9118 struct fn_fieldlist
*fn_flp
9119 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9120 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9121 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9122 = physname
? physname
: "";
9124 /* Since there's no tag to indicate whether a method is a
9125 const/volatile overload, extract that information out of the
9127 if (physname
!= NULL
)
9129 size_t len
= strlen (physname
);
9133 if (physname
[len
] == ')') /* shortcut */
9135 else if (check_modifier (physname
, len
, " const"))
9136 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9137 else if (check_modifier (physname
, len
, " volatile"))
9138 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9145 /* The list is no longer needed. */
9146 cu
->method_list
.clear ();
9149 /* Go objects should be embedded in a DW_TAG_module DIE,
9150 and it's not clear if/how imported objects will appear.
9151 To keep Go support simple until that's worked out,
9152 go back through what we've read and create something usable.
9153 We could do this while processing each DIE, and feels kinda cleaner,
9154 but that way is more invasive.
9155 This is to, for example, allow the user to type "p var" or "b main"
9156 without having to specify the package name, and allow lookups
9157 of module.object to work in contexts that use the expression
9161 fixup_go_packaging (struct dwarf2_cu
*cu
)
9163 gdb::unique_xmalloc_ptr
<char> package_name
;
9164 struct pending
*list
;
9167 for (list
= *cu
->get_builder ()->get_global_symbols ();
9171 for (i
= 0; i
< list
->nsyms
; ++i
)
9173 struct symbol
*sym
= list
->symbol
[i
];
9175 if (sym
->language () == language_go
9176 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9178 gdb::unique_xmalloc_ptr
<char> this_package_name
9179 (go_symbol_package_name (sym
));
9181 if (this_package_name
== NULL
)
9183 if (package_name
== NULL
)
9184 package_name
= std::move (this_package_name
);
9187 struct objfile
*objfile
9188 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9189 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9190 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9191 (symbol_symtab (sym
) != NULL
9192 ? symtab_to_filename_for_display
9193 (symbol_symtab (sym
))
9194 : objfile_name (objfile
)),
9195 this_package_name
.get (), package_name
.get ());
9201 if (package_name
!= NULL
)
9203 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9204 const char *saved_package_name
= objfile
->intern (package_name
.get ());
9205 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9206 saved_package_name
);
9209 sym
= new (&objfile
->objfile_obstack
) symbol
;
9210 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9211 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9212 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9213 e.g., "main" finds the "main" module and not C's main(). */
9214 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9215 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9216 SYMBOL_TYPE (sym
) = type
;
9218 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9222 /* Allocate a fully-qualified name consisting of the two parts on the
9226 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9228 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9231 /* A helper that allocates a variant part to attach to a Rust enum
9232 type. OBSTACK is where the results should be allocated. TYPE is
9233 the type we're processing. DISCRIMINANT_INDEX is the index of the
9234 discriminant. It must be the index of one of the fields of TYPE.
9235 DEFAULT_INDEX is the index of the default field; or -1 if there is
9236 no default. RANGES is indexed by "effective" field number (the
9237 field index, but omitting the discriminant and default fields) and
9238 must hold the discriminant values used by the variants. Note that
9239 RANGES must have a lifetime at least as long as OBSTACK -- either
9240 already allocated on it, or static. */
9243 alloc_rust_variant (struct obstack
*obstack
, struct type
*type
,
9244 int discriminant_index
, int default_index
,
9245 gdb::array_view
<discriminant_range
> ranges
)
9247 /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. Those
9248 must be handled by the caller. */
9249 gdb_assert (discriminant_index
>= 0
9250 && discriminant_index
< type
->num_fields ());
9251 gdb_assert (default_index
== -1
9252 || (default_index
>= 0 && default_index
< type
->num_fields ()));
9254 /* We have one variant for each non-discriminant field. */
9255 int n_variants
= type
->num_fields () - 1;
9257 variant
*variants
= new (obstack
) variant
[n_variants
];
9260 for (int i
= 0; i
< type
->num_fields (); ++i
)
9262 if (i
== discriminant_index
)
9265 variants
[var_idx
].first_field
= i
;
9266 variants
[var_idx
].last_field
= i
+ 1;
9268 /* The default field does not need a range, but other fields do.
9269 We skipped the discriminant above. */
9270 if (i
!= default_index
)
9272 variants
[var_idx
].discriminants
= ranges
.slice (range_idx
, 1);
9279 gdb_assert (range_idx
== ranges
.size ());
9280 gdb_assert (var_idx
== n_variants
);
9282 variant_part
*part
= new (obstack
) variant_part
;
9283 part
->discriminant_index
= discriminant_index
;
9284 part
->is_unsigned
= TYPE_UNSIGNED (TYPE_FIELD_TYPE (type
,
9285 discriminant_index
));
9286 part
->variants
= gdb::array_view
<variant
> (variants
, n_variants
);
9288 void *storage
= obstack_alloc (obstack
, sizeof (gdb::array_view
<variant_part
>));
9289 gdb::array_view
<variant_part
> *prop_value
9290 = new (storage
) gdb::array_view
<variant_part
> (part
, 1);
9292 struct dynamic_prop prop
;
9293 prop
.kind
= PROP_VARIANT_PARTS
;
9294 prop
.data
.variant_parts
= prop_value
;
9296 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
9299 /* Some versions of rustc emitted enums in an unusual way.
9301 Ordinary enums were emitted as unions. The first element of each
9302 structure in the union was named "RUST$ENUM$DISR". This element
9303 held the discriminant.
9305 These versions of Rust also implemented the "non-zero"
9306 optimization. When the enum had two values, and one is empty and
9307 the other holds a pointer that cannot be zero, the pointer is used
9308 as the discriminant, with a zero value meaning the empty variant.
9309 Here, the union's first member is of the form
9310 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9311 where the fieldnos are the indices of the fields that should be
9312 traversed in order to find the field (which may be several fields deep)
9313 and the variantname is the name of the variant of the case when the
9316 This function recognizes whether TYPE is of one of these forms,
9317 and, if so, smashes it to be a variant type. */
9320 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9322 gdb_assert (type
->code () == TYPE_CODE_UNION
);
9324 /* We don't need to deal with empty enums. */
9325 if (type
->num_fields () == 0)
9328 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9329 if (type
->num_fields () == 1
9330 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9332 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9334 /* Decode the field name to find the offset of the
9336 ULONGEST bit_offset
= 0;
9337 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9338 while (name
[0] >= '0' && name
[0] <= '9')
9341 unsigned long index
= strtoul (name
, &tail
, 10);
9344 || index
>= field_type
->num_fields ()
9345 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9346 != FIELD_LOC_KIND_BITPOS
))
9348 complaint (_("Could not parse Rust enum encoding string \"%s\""
9350 TYPE_FIELD_NAME (type
, 0),
9351 objfile_name (objfile
));
9356 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9357 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9360 /* Smash this type to be a structure type. We have to do this
9361 because the type has already been recorded. */
9362 type
->set_code (TYPE_CODE_STRUCT
);
9363 type
->set_num_fields (3);
9364 /* Save the field we care about. */
9365 struct field saved_field
= type
->field (0);
9367 ((struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
)));
9369 /* Put the discriminant at index 0. */
9370 TYPE_FIELD_TYPE (type
, 0) = field_type
;
9371 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9372 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9373 SET_FIELD_BITPOS (type
->field (0), bit_offset
);
9375 /* The order of fields doesn't really matter, so put the real
9376 field at index 1 and the data-less field at index 2. */
9377 type
->field (1) = saved_field
;
9378 TYPE_FIELD_NAME (type
, 1)
9379 = rust_last_path_segment (TYPE_FIELD_TYPE (type
, 1)->name ());
9380 TYPE_FIELD_TYPE (type
, 1)->set_name
9381 (rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9382 TYPE_FIELD_NAME (type
, 1)));
9384 const char *dataless_name
9385 = rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9387 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9389 TYPE_FIELD_TYPE (type
, 2) = dataless_type
;
9390 /* NAME points into the original discriminant name, which
9391 already has the correct lifetime. */
9392 TYPE_FIELD_NAME (type
, 2) = name
;
9393 SET_FIELD_BITPOS (type
->field (2), 0);
9395 /* Indicate that this is a variant type. */
9396 static discriminant_range ranges
[1] = { { 0, 0 } };
9397 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1, ranges
);
9399 /* A union with a single anonymous field is probably an old-style
9401 else if (type
->num_fields () == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9403 /* Smash this type to be a structure type. We have to do this
9404 because the type has already been recorded. */
9405 type
->set_code (TYPE_CODE_STRUCT
);
9407 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9408 const char *variant_name
9409 = rust_last_path_segment (field_type
->name ());
9410 TYPE_FIELD_NAME (type
, 0) = variant_name
;
9411 field_type
->set_name
9412 (rust_fully_qualify (&objfile
->objfile_obstack
,
9413 type
->name (), variant_name
));
9417 struct type
*disr_type
= nullptr;
9418 for (int i
= 0; i
< type
->num_fields (); ++i
)
9420 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9422 if (disr_type
->code () != TYPE_CODE_STRUCT
)
9424 /* All fields of a true enum will be structs. */
9427 else if (disr_type
->num_fields () == 0)
9429 /* Could be data-less variant, so keep going. */
9430 disr_type
= nullptr;
9432 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9433 "RUST$ENUM$DISR") != 0)
9435 /* Not a Rust enum. */
9445 /* If we got here without a discriminant, then it's probably
9447 if (disr_type
== nullptr)
9450 /* Smash this type to be a structure type. We have to do this
9451 because the type has already been recorded. */
9452 type
->set_code (TYPE_CODE_STRUCT
);
9454 /* Make space for the discriminant field. */
9455 struct field
*disr_field
= &disr_type
->field (0);
9457 = (struct field
*) TYPE_ZALLOC (type
, ((type
->num_fields () + 1)
9458 * sizeof (struct field
)));
9459 memcpy (new_fields
+ 1, type
->fields (),
9460 type
->num_fields () * sizeof (struct field
));
9461 type
->set_fields (new_fields
);
9462 type
->set_num_fields (type
->num_fields () + 1);
9464 /* Install the discriminant at index 0 in the union. */
9465 type
->field (0) = *disr_field
;
9466 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9467 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9469 /* We need a way to find the correct discriminant given a
9470 variant name. For convenience we build a map here. */
9471 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
9472 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9473 for (int i
= 0; i
< enum_type
->num_fields (); ++i
)
9475 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9478 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9479 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9483 int n_fields
= type
->num_fields ();
9484 /* We don't need a range entry for the discriminant, but we do
9485 need one for every other field, as there is no default
9487 discriminant_range
*ranges
= XOBNEWVEC (&objfile
->objfile_obstack
,
9490 /* Skip the discriminant here. */
9491 for (int i
= 1; i
< n_fields
; ++i
)
9493 /* Find the final word in the name of this variant's type.
9494 That name can be used to look up the correct
9496 const char *variant_name
9497 = rust_last_path_segment (TYPE_FIELD_TYPE (type
, i
)->name ());
9499 auto iter
= discriminant_map
.find (variant_name
);
9500 if (iter
!= discriminant_map
.end ())
9502 ranges
[i
].low
= iter
->second
;
9503 ranges
[i
].high
= iter
->second
;
9506 /* Remove the discriminant field, if it exists. */
9507 struct type
*sub_type
= TYPE_FIELD_TYPE (type
, i
);
9508 if (sub_type
->num_fields () > 0)
9510 sub_type
->set_num_fields (sub_type
->num_fields () - 1);
9511 sub_type
->set_fields (sub_type
->fields () + 1);
9513 TYPE_FIELD_NAME (type
, i
) = variant_name
;
9515 (rust_fully_qualify (&objfile
->objfile_obstack
,
9516 type
->name (), variant_name
));
9519 /* Indicate that this is a variant type. */
9520 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1,
9521 gdb::array_view
<discriminant_range
> (ranges
,
9526 /* Rewrite some Rust unions to be structures with variants parts. */
9529 rust_union_quirks (struct dwarf2_cu
*cu
)
9531 gdb_assert (cu
->language
== language_rust
);
9532 for (type
*type_
: cu
->rust_unions
)
9533 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
9534 /* We don't need this any more. */
9535 cu
->rust_unions
.clear ();
9538 /* Return the symtab for PER_CU. This works properly regardless of
9539 whether we're using the index or psymtabs. */
9541 static struct compunit_symtab
*
9542 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
9544 return (per_cu
->dwarf2_per_objfile
->per_bfd
->using_index
9545 ? per_cu
->v
.quick
->compunit_symtab
9546 : per_cu
->v
.psymtab
->compunit_symtab
);
9549 /* A helper function for computing the list of all symbol tables
9550 included by PER_CU. */
9553 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9554 htab_t all_children
, htab_t all_type_symtabs
,
9555 struct dwarf2_per_cu_data
*per_cu
,
9556 struct compunit_symtab
*immediate_parent
)
9559 struct compunit_symtab
*cust
;
9561 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9564 /* This inclusion and its children have been processed. */
9569 /* Only add a CU if it has a symbol table. */
9570 cust
= get_compunit_symtab (per_cu
);
9573 /* If this is a type unit only add its symbol table if we haven't
9574 seen it yet (type unit per_cu's can share symtabs). */
9575 if (per_cu
->is_debug_types
)
9577 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9581 result
->push_back (cust
);
9582 if (cust
->user
== NULL
)
9583 cust
->user
= immediate_parent
;
9588 result
->push_back (cust
);
9589 if (cust
->user
== NULL
)
9590 cust
->user
= immediate_parent
;
9594 if (!per_cu
->imported_symtabs_empty ())
9595 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9597 recursively_compute_inclusions (result
, all_children
,
9598 all_type_symtabs
, ptr
, cust
);
9602 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9606 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
9608 gdb_assert (! per_cu
->is_debug_types
);
9610 if (!per_cu
->imported_symtabs_empty ())
9613 std::vector
<compunit_symtab
*> result_symtabs
;
9614 htab_t all_children
, all_type_symtabs
;
9615 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
9617 /* If we don't have a symtab, we can just skip this case. */
9621 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9622 NULL
, xcalloc
, xfree
);
9623 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9624 NULL
, xcalloc
, xfree
);
9626 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9628 recursively_compute_inclusions (&result_symtabs
, all_children
,
9629 all_type_symtabs
, ptr
, cust
);
9632 /* Now we have a transitive closure of all the included symtabs. */
9633 len
= result_symtabs
.size ();
9635 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
9636 struct compunit_symtab
*, len
+ 1);
9637 memcpy (cust
->includes
, result_symtabs
.data (),
9638 len
* sizeof (compunit_symtab
*));
9639 cust
->includes
[len
] = NULL
;
9641 htab_delete (all_children
);
9642 htab_delete (all_type_symtabs
);
9646 /* Compute the 'includes' field for the symtabs of all the CUs we just
9650 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9652 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->per_bfd
->just_read_cus
)
9654 if (! iter
->is_debug_types
)
9655 compute_compunit_symtab_includes (iter
);
9658 dwarf2_per_objfile
->per_bfd
->just_read_cus
.clear ();
9661 /* Generate full symbol information for PER_CU, whose DIEs have
9662 already been loaded into memory. */
9665 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9666 enum language pretend_language
)
9668 struct dwarf2_cu
*cu
= per_cu
->cu
;
9669 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9670 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9671 struct gdbarch
*gdbarch
= objfile
->arch ();
9672 CORE_ADDR lowpc
, highpc
;
9673 struct compunit_symtab
*cust
;
9675 struct block
*static_block
;
9678 baseaddr
= objfile
->text_section_offset ();
9680 /* Clear the list here in case something was left over. */
9681 cu
->method_list
.clear ();
9683 cu
->language
= pretend_language
;
9684 cu
->language_defn
= language_def (cu
->language
);
9686 /* Do line number decoding in read_file_scope () */
9687 process_die (cu
->dies
, cu
);
9689 /* For now fudge the Go package. */
9690 if (cu
->language
== language_go
)
9691 fixup_go_packaging (cu
);
9693 /* Now that we have processed all the DIEs in the CU, all the types
9694 should be complete, and it should now be safe to compute all of the
9696 compute_delayed_physnames (cu
);
9698 if (cu
->language
== language_rust
)
9699 rust_union_quirks (cu
);
9701 /* Some compilers don't define a DW_AT_high_pc attribute for the
9702 compilation unit. If the DW_AT_high_pc is missing, synthesize
9703 it, by scanning the DIE's below the compilation unit. */
9704 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
9706 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
9707 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
9709 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
9710 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
9711 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
9712 addrmap to help ensure it has an accurate map of pc values belonging to
9714 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
9716 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
9717 SECT_OFF_TEXT (objfile
),
9722 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
9724 /* Set symtab language to language from DW_AT_language. If the
9725 compilation is from a C file generated by language preprocessors, do
9726 not set the language if it was already deduced by start_subfile. */
9727 if (!(cu
->language
== language_c
9728 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
9729 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9731 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
9732 produce DW_AT_location with location lists but it can be possibly
9733 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
9734 there were bugs in prologue debug info, fixed later in GCC-4.5
9735 by "unwind info for epilogues" patch (which is not directly related).
9737 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
9738 needed, it would be wrong due to missing DW_AT_producer there.
9740 Still one can confuse GDB by using non-standard GCC compilation
9741 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
9743 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
9744 cust
->locations_valid
= 1;
9746 if (gcc_4_minor
>= 5)
9747 cust
->epilogue_unwind_valid
= 1;
9749 cust
->call_site_htab
= cu
->call_site_htab
;
9752 if (dwarf2_per_objfile
->per_bfd
->using_index
)
9753 per_cu
->v
.quick
->compunit_symtab
= cust
;
9756 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9757 pst
->compunit_symtab
= cust
;
9761 /* Push it for inclusion processing later. */
9762 dwarf2_per_objfile
->per_bfd
->just_read_cus
.push_back (per_cu
);
9764 /* Not needed any more. */
9765 cu
->reset_builder ();
9768 /* Generate full symbol information for type unit PER_CU, whose DIEs have
9769 already been loaded into memory. */
9772 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
9773 enum language pretend_language
)
9775 struct dwarf2_cu
*cu
= per_cu
->cu
;
9776 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9777 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9778 struct compunit_symtab
*cust
;
9779 struct signatured_type
*sig_type
;
9781 gdb_assert (per_cu
->is_debug_types
);
9782 sig_type
= (struct signatured_type
*) per_cu
;
9784 /* Clear the list here in case something was left over. */
9785 cu
->method_list
.clear ();
9787 cu
->language
= pretend_language
;
9788 cu
->language_defn
= language_def (cu
->language
);
9790 /* The symbol tables are set up in read_type_unit_scope. */
9791 process_die (cu
->dies
, cu
);
9793 /* For now fudge the Go package. */
9794 if (cu
->language
== language_go
)
9795 fixup_go_packaging (cu
);
9797 /* Now that we have processed all the DIEs in the CU, all the types
9798 should be complete, and it should now be safe to compute all of the
9800 compute_delayed_physnames (cu
);
9802 if (cu
->language
== language_rust
)
9803 rust_union_quirks (cu
);
9805 /* TUs share symbol tables.
9806 If this is the first TU to use this symtab, complete the construction
9807 of it with end_expandable_symtab. Otherwise, complete the addition of
9808 this TU's symbols to the existing symtab. */
9809 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
9811 buildsym_compunit
*builder
= cu
->get_builder ();
9812 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
9813 sig_type
->type_unit_group
->compunit_symtab
= cust
;
9817 /* Set symtab language to language from DW_AT_language. If the
9818 compilation is from a C file generated by language preprocessors,
9819 do not set the language if it was already deduced by
9821 if (!(cu
->language
== language_c
9822 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
9823 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9828 cu
->get_builder ()->augment_type_symtab ();
9829 cust
= sig_type
->type_unit_group
->compunit_symtab
;
9832 if (dwarf2_per_objfile
->per_bfd
->using_index
)
9833 per_cu
->v
.quick
->compunit_symtab
= cust
;
9836 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9837 pst
->compunit_symtab
= cust
;
9841 /* Not needed any more. */
9842 cu
->reset_builder ();
9845 /* Process an imported unit DIE. */
9848 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9850 struct attribute
*attr
;
9852 /* For now we don't handle imported units in type units. */
9853 if (cu
->per_cu
->is_debug_types
)
9855 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9856 " supported in type units [in module %s]"),
9857 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
9860 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9863 sect_offset sect_off
= attr
->get_ref_die_offset ();
9864 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
9865 dwarf2_per_cu_data
*per_cu
9866 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
9867 cu
->per_cu
->dwarf2_per_objfile
);
9869 /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit
9870 into another compilation unit, at root level. Regard this as a hint,
9872 if (die
->parent
&& die
->parent
->parent
== NULL
9873 && per_cu
->unit_type
== DW_UT_compile
9874 && per_cu
->lang
== language_cplus
)
9877 /* If necessary, add it to the queue and load its DIEs. */
9878 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
9879 load_full_comp_unit (per_cu
, false, cu
->language
);
9881 cu
->per_cu
->imported_symtabs_push (per_cu
);
9885 /* RAII object that represents a process_die scope: i.e.,
9886 starts/finishes processing a DIE. */
9887 class process_die_scope
9890 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
9891 : m_die (die
), m_cu (cu
)
9893 /* We should only be processing DIEs not already in process. */
9894 gdb_assert (!m_die
->in_process
);
9895 m_die
->in_process
= true;
9898 ~process_die_scope ()
9900 m_die
->in_process
= false;
9902 /* If we're done processing the DIE for the CU that owns the line
9903 header, we don't need the line header anymore. */
9904 if (m_cu
->line_header_die_owner
== m_die
)
9906 delete m_cu
->line_header
;
9907 m_cu
->line_header
= NULL
;
9908 m_cu
->line_header_die_owner
= NULL
;
9917 /* Process a die and its children. */
9920 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9922 process_die_scope
scope (die
, cu
);
9926 case DW_TAG_padding
:
9928 case DW_TAG_compile_unit
:
9929 case DW_TAG_partial_unit
:
9930 read_file_scope (die
, cu
);
9932 case DW_TAG_type_unit
:
9933 read_type_unit_scope (die
, cu
);
9935 case DW_TAG_subprogram
:
9936 /* Nested subprograms in Fortran get a prefix. */
9937 if (cu
->language
== language_fortran
9938 && die
->parent
!= NULL
9939 && die
->parent
->tag
== DW_TAG_subprogram
)
9940 cu
->processing_has_namespace_info
= true;
9942 case DW_TAG_inlined_subroutine
:
9943 read_func_scope (die
, cu
);
9945 case DW_TAG_lexical_block
:
9946 case DW_TAG_try_block
:
9947 case DW_TAG_catch_block
:
9948 read_lexical_block_scope (die
, cu
);
9950 case DW_TAG_call_site
:
9951 case DW_TAG_GNU_call_site
:
9952 read_call_site_scope (die
, cu
);
9954 case DW_TAG_class_type
:
9955 case DW_TAG_interface_type
:
9956 case DW_TAG_structure_type
:
9957 case DW_TAG_union_type
:
9958 process_structure_scope (die
, cu
);
9960 case DW_TAG_enumeration_type
:
9961 process_enumeration_scope (die
, cu
);
9964 /* These dies have a type, but processing them does not create
9965 a symbol or recurse to process the children. Therefore we can
9966 read them on-demand through read_type_die. */
9967 case DW_TAG_subroutine_type
:
9968 case DW_TAG_set_type
:
9969 case DW_TAG_array_type
:
9970 case DW_TAG_pointer_type
:
9971 case DW_TAG_ptr_to_member_type
:
9972 case DW_TAG_reference_type
:
9973 case DW_TAG_rvalue_reference_type
:
9974 case DW_TAG_string_type
:
9977 case DW_TAG_base_type
:
9978 case DW_TAG_subrange_type
:
9979 case DW_TAG_typedef
:
9980 /* Add a typedef symbol for the type definition, if it has a
9982 new_symbol (die
, read_type_die (die
, cu
), cu
);
9984 case DW_TAG_common_block
:
9985 read_common_block (die
, cu
);
9987 case DW_TAG_common_inclusion
:
9989 case DW_TAG_namespace
:
9990 cu
->processing_has_namespace_info
= true;
9991 read_namespace (die
, cu
);
9994 cu
->processing_has_namespace_info
= true;
9995 read_module (die
, cu
);
9997 case DW_TAG_imported_declaration
:
9998 cu
->processing_has_namespace_info
= true;
9999 if (read_namespace_alias (die
, cu
))
10001 /* The declaration is not a global namespace alias. */
10002 /* Fall through. */
10003 case DW_TAG_imported_module
:
10004 cu
->processing_has_namespace_info
= true;
10005 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10006 || cu
->language
!= language_fortran
))
10007 complaint (_("Tag '%s' has unexpected children"),
10008 dwarf_tag_name (die
->tag
));
10009 read_import_statement (die
, cu
);
10012 case DW_TAG_imported_unit
:
10013 process_imported_unit_die (die
, cu
);
10016 case DW_TAG_variable
:
10017 read_variable (die
, cu
);
10021 new_symbol (die
, NULL
, cu
);
10026 /* DWARF name computation. */
10028 /* A helper function for dwarf2_compute_name which determines whether DIE
10029 needs to have the name of the scope prepended to the name listed in the
10033 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10035 struct attribute
*attr
;
10039 case DW_TAG_namespace
:
10040 case DW_TAG_typedef
:
10041 case DW_TAG_class_type
:
10042 case DW_TAG_interface_type
:
10043 case DW_TAG_structure_type
:
10044 case DW_TAG_union_type
:
10045 case DW_TAG_enumeration_type
:
10046 case DW_TAG_enumerator
:
10047 case DW_TAG_subprogram
:
10048 case DW_TAG_inlined_subroutine
:
10049 case DW_TAG_member
:
10050 case DW_TAG_imported_declaration
:
10053 case DW_TAG_variable
:
10054 case DW_TAG_constant
:
10055 /* We only need to prefix "globally" visible variables. These include
10056 any variable marked with DW_AT_external or any variable that
10057 lives in a namespace. [Variables in anonymous namespaces
10058 require prefixing, but they are not DW_AT_external.] */
10060 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10062 struct dwarf2_cu
*spec_cu
= cu
;
10064 return die_needs_namespace (die_specification (die
, &spec_cu
),
10068 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10069 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10070 && die
->parent
->tag
!= DW_TAG_module
)
10072 /* A variable in a lexical block of some kind does not need a
10073 namespace, even though in C++ such variables may be external
10074 and have a mangled name. */
10075 if (die
->parent
->tag
== DW_TAG_lexical_block
10076 || die
->parent
->tag
== DW_TAG_try_block
10077 || die
->parent
->tag
== DW_TAG_catch_block
10078 || die
->parent
->tag
== DW_TAG_subprogram
)
10087 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10088 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10089 defined for the given DIE. */
10091 static struct attribute
*
10092 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10094 struct attribute
*attr
;
10096 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10098 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10103 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10104 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10105 defined for the given DIE. */
10107 static const char *
10108 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10110 const char *linkage_name
;
10112 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10113 if (linkage_name
== NULL
)
10114 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10116 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10117 See https://github.com/rust-lang/rust/issues/32925. */
10118 if (cu
->language
== language_rust
&& linkage_name
!= NULL
10119 && strchr (linkage_name
, '{') != NULL
)
10120 linkage_name
= NULL
;
10122 return linkage_name
;
10125 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10126 compute the physname for the object, which include a method's:
10127 - formal parameters (C++),
10128 - receiver type (Go),
10130 The term "physname" is a bit confusing.
10131 For C++, for example, it is the demangled name.
10132 For Go, for example, it's the mangled name.
10134 For Ada, return the DIE's linkage name rather than the fully qualified
10135 name. PHYSNAME is ignored..
10137 The result is allocated on the objfile->per_bfd's obstack and
10140 static const char *
10141 dwarf2_compute_name (const char *name
,
10142 struct die_info
*die
, struct dwarf2_cu
*cu
,
10145 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10148 name
= dwarf2_name (die
, cu
);
10150 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10151 but otherwise compute it by typename_concat inside GDB.
10152 FIXME: Actually this is not really true, or at least not always true.
10153 It's all very confusing. compute_and_set_names doesn't try to demangle
10154 Fortran names because there is no mangling standard. So new_symbol
10155 will set the demangled name to the result of dwarf2_full_name, and it is
10156 the demangled name that GDB uses if it exists. */
10157 if (cu
->language
== language_ada
10158 || (cu
->language
== language_fortran
&& physname
))
10160 /* For Ada unit, we prefer the linkage name over the name, as
10161 the former contains the exported name, which the user expects
10162 to be able to reference. Ideally, we want the user to be able
10163 to reference this entity using either natural or linkage name,
10164 but we haven't started looking at this enhancement yet. */
10165 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10167 if (linkage_name
!= NULL
)
10168 return linkage_name
;
10171 /* These are the only languages we know how to qualify names in. */
10173 && (cu
->language
== language_cplus
10174 || cu
->language
== language_fortran
|| cu
->language
== language_d
10175 || cu
->language
== language_rust
))
10177 if (die_needs_namespace (die
, cu
))
10179 const char *prefix
;
10180 const char *canonical_name
= NULL
;
10184 prefix
= determine_prefix (die
, cu
);
10185 if (*prefix
!= '\0')
10187 gdb::unique_xmalloc_ptr
<char> prefixed_name
10188 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10190 buf
.puts (prefixed_name
.get ());
10195 /* Template parameters may be specified in the DIE's DW_AT_name, or
10196 as children with DW_TAG_template_type_param or
10197 DW_TAG_value_type_param. If the latter, add them to the name
10198 here. If the name already has template parameters, then
10199 skip this step; some versions of GCC emit both, and
10200 it is more efficient to use the pre-computed name.
10202 Something to keep in mind about this process: it is very
10203 unlikely, or in some cases downright impossible, to produce
10204 something that will match the mangled name of a function.
10205 If the definition of the function has the same debug info,
10206 we should be able to match up with it anyway. But fallbacks
10207 using the minimal symbol, for instance to find a method
10208 implemented in a stripped copy of libstdc++, will not work.
10209 If we do not have debug info for the definition, we will have to
10210 match them up some other way.
10212 When we do name matching there is a related problem with function
10213 templates; two instantiated function templates are allowed to
10214 differ only by their return types, which we do not add here. */
10216 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10218 struct attribute
*attr
;
10219 struct die_info
*child
;
10222 die
->building_fullname
= 1;
10224 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10228 const gdb_byte
*bytes
;
10229 struct dwarf2_locexpr_baton
*baton
;
10232 if (child
->tag
!= DW_TAG_template_type_param
10233 && child
->tag
!= DW_TAG_template_value_param
)
10244 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10247 complaint (_("template parameter missing DW_AT_type"));
10248 buf
.puts ("UNKNOWN_TYPE");
10251 type
= die_type (child
, cu
);
10253 if (child
->tag
== DW_TAG_template_type_param
)
10255 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10256 &type_print_raw_options
);
10260 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10263 complaint (_("template parameter missing "
10264 "DW_AT_const_value"));
10265 buf
.puts ("UNKNOWN_VALUE");
10269 dwarf2_const_value_attr (attr
, type
, name
,
10270 &cu
->comp_unit_obstack
, cu
,
10271 &value
, &bytes
, &baton
);
10273 if (TYPE_NOSIGN (type
))
10274 /* GDB prints characters as NUMBER 'CHAR'. If that's
10275 changed, this can use value_print instead. */
10276 c_printchar (value
, type
, &buf
);
10279 struct value_print_options opts
;
10282 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10286 else if (bytes
!= NULL
)
10288 v
= allocate_value (type
);
10289 memcpy (value_contents_writeable (v
), bytes
,
10290 TYPE_LENGTH (type
));
10293 v
= value_from_longest (type
, value
);
10295 /* Specify decimal so that we do not depend on
10297 get_formatted_print_options (&opts
, 'd');
10299 value_print (v
, &buf
, &opts
);
10304 die
->building_fullname
= 0;
10308 /* Close the argument list, with a space if necessary
10309 (nested templates). */
10310 if (!buf
.empty () && buf
.string ().back () == '>')
10317 /* For C++ methods, append formal parameter type
10318 information, if PHYSNAME. */
10320 if (physname
&& die
->tag
== DW_TAG_subprogram
10321 && cu
->language
== language_cplus
)
10323 struct type
*type
= read_type_die (die
, cu
);
10325 c_type_print_args (type
, &buf
, 1, cu
->language
,
10326 &type_print_raw_options
);
10328 if (cu
->language
== language_cplus
)
10330 /* Assume that an artificial first parameter is
10331 "this", but do not crash if it is not. RealView
10332 marks unnamed (and thus unused) parameters as
10333 artificial; there is no way to differentiate
10335 if (type
->num_fields () > 0
10336 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10337 && TYPE_FIELD_TYPE (type
, 0)->code () == TYPE_CODE_PTR
10338 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10340 buf
.puts (" const");
10344 const std::string
&intermediate_name
= buf
.string ();
10346 if (cu
->language
== language_cplus
)
10348 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10351 /* If we only computed INTERMEDIATE_NAME, or if
10352 INTERMEDIATE_NAME is already canonical, then we need to
10354 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10355 name
= objfile
->intern (intermediate_name
);
10357 name
= canonical_name
;
10364 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10365 If scope qualifiers are appropriate they will be added. The result
10366 will be allocated on the storage_obstack, or NULL if the DIE does
10367 not have a name. NAME may either be from a previous call to
10368 dwarf2_name or NULL.
10370 The output string will be canonicalized (if C++). */
10372 static const char *
10373 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10375 return dwarf2_compute_name (name
, die
, cu
, 0);
10378 /* Construct a physname for the given DIE in CU. NAME may either be
10379 from a previous call to dwarf2_name or NULL. The result will be
10380 allocated on the objfile_objstack or NULL if the DIE does not have a
10383 The output string will be canonicalized (if C++). */
10385 static const char *
10386 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10388 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10389 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10392 /* In this case dwarf2_compute_name is just a shortcut not building anything
10394 if (!die_needs_namespace (die
, cu
))
10395 return dwarf2_compute_name (name
, die
, cu
, 1);
10397 if (cu
->language
!= language_rust
)
10398 mangled
= dw2_linkage_name (die
, cu
);
10400 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10402 gdb::unique_xmalloc_ptr
<char> demangled
;
10403 if (mangled
!= NULL
)
10406 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10408 /* Do nothing (do not demangle the symbol name). */
10410 else if (cu
->language
== language_go
)
10412 /* This is a lie, but we already lie to the caller new_symbol.
10413 new_symbol assumes we return the mangled name.
10414 This just undoes that lie until things are cleaned up. */
10418 /* Use DMGL_RET_DROP for C++ template functions to suppress
10419 their return type. It is easier for GDB users to search
10420 for such functions as `name(params)' than `long name(params)'.
10421 In such case the minimal symbol names do not match the full
10422 symbol names but for template functions there is never a need
10423 to look up their definition from their declaration so
10424 the only disadvantage remains the minimal symbol variant
10425 `long name(params)' does not have the proper inferior type. */
10426 demangled
.reset (gdb_demangle (mangled
,
10427 (DMGL_PARAMS
| DMGL_ANSI
10428 | DMGL_RET_DROP
)));
10431 canon
= demangled
.get ();
10439 if (canon
== NULL
|| check_physname
)
10441 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10443 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10445 /* It may not mean a bug in GDB. The compiler could also
10446 compute DW_AT_linkage_name incorrectly. But in such case
10447 GDB would need to be bug-to-bug compatible. */
10449 complaint (_("Computed physname <%s> does not match demangled <%s> "
10450 "(from linkage <%s>) - DIE at %s [in module %s]"),
10451 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10452 objfile_name (objfile
));
10454 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10455 is available here - over computed PHYSNAME. It is safer
10456 against both buggy GDB and buggy compilers. */
10470 retval
= objfile
->intern (retval
);
10475 /* Inspect DIE in CU for a namespace alias. If one exists, record
10476 a new symbol for it.
10478 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10481 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10483 struct attribute
*attr
;
10485 /* If the die does not have a name, this is not a namespace
10487 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10491 struct die_info
*d
= die
;
10492 struct dwarf2_cu
*imported_cu
= cu
;
10494 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10495 keep inspecting DIEs until we hit the underlying import. */
10496 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10497 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10499 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10503 d
= follow_die_ref (d
, attr
, &imported_cu
);
10504 if (d
->tag
!= DW_TAG_imported_declaration
)
10508 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10510 complaint (_("DIE at %s has too many recursively imported "
10511 "declarations"), sect_offset_str (d
->sect_off
));
10518 sect_offset sect_off
= attr
->get_ref_die_offset ();
10520 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
10521 if (type
!= NULL
&& type
->code () == TYPE_CODE_NAMESPACE
)
10523 /* This declaration is a global namespace alias. Add
10524 a symbol for it whose type is the aliased namespace. */
10525 new_symbol (die
, type
, cu
);
10534 /* Return the using directives repository (global or local?) to use in the
10535 current context for CU.
10537 For Ada, imported declarations can materialize renamings, which *may* be
10538 global. However it is impossible (for now?) in DWARF to distinguish
10539 "external" imported declarations and "static" ones. As all imported
10540 declarations seem to be static in all other languages, make them all CU-wide
10541 global only in Ada. */
10543 static struct using_direct
**
10544 using_directives (struct dwarf2_cu
*cu
)
10546 if (cu
->language
== language_ada
10547 && cu
->get_builder ()->outermost_context_p ())
10548 return cu
->get_builder ()->get_global_using_directives ();
10550 return cu
->get_builder ()->get_local_using_directives ();
10553 /* Read the import statement specified by the given die and record it. */
10556 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10558 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10559 struct attribute
*import_attr
;
10560 struct die_info
*imported_die
, *child_die
;
10561 struct dwarf2_cu
*imported_cu
;
10562 const char *imported_name
;
10563 const char *imported_name_prefix
;
10564 const char *canonical_name
;
10565 const char *import_alias
;
10566 const char *imported_declaration
= NULL
;
10567 const char *import_prefix
;
10568 std::vector
<const char *> excludes
;
10570 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10571 if (import_attr
== NULL
)
10573 complaint (_("Tag '%s' has no DW_AT_import"),
10574 dwarf_tag_name (die
->tag
));
10579 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10580 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10581 if (imported_name
== NULL
)
10583 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10585 The import in the following code:
10599 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10600 <52> DW_AT_decl_file : 1
10601 <53> DW_AT_decl_line : 6
10602 <54> DW_AT_import : <0x75>
10603 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10604 <59> DW_AT_name : B
10605 <5b> DW_AT_decl_file : 1
10606 <5c> DW_AT_decl_line : 2
10607 <5d> DW_AT_type : <0x6e>
10609 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10610 <76> DW_AT_byte_size : 4
10611 <77> DW_AT_encoding : 5 (signed)
10613 imports the wrong die ( 0x75 instead of 0x58 ).
10614 This case will be ignored until the gcc bug is fixed. */
10618 /* Figure out the local name after import. */
10619 import_alias
= dwarf2_name (die
, cu
);
10621 /* Figure out where the statement is being imported to. */
10622 import_prefix
= determine_prefix (die
, cu
);
10624 /* Figure out what the scope of the imported die is and prepend it
10625 to the name of the imported die. */
10626 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10628 if (imported_die
->tag
!= DW_TAG_namespace
10629 && imported_die
->tag
!= DW_TAG_module
)
10631 imported_declaration
= imported_name
;
10632 canonical_name
= imported_name_prefix
;
10634 else if (strlen (imported_name_prefix
) > 0)
10635 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10636 imported_name_prefix
,
10637 (cu
->language
== language_d
? "." : "::"),
10638 imported_name
, (char *) NULL
);
10640 canonical_name
= imported_name
;
10642 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10643 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10644 child_die
= child_die
->sibling
)
10646 /* DWARF-4: A Fortran use statement with a “rename list” may be
10647 represented by an imported module entry with an import attribute
10648 referring to the module and owned entries corresponding to those
10649 entities that are renamed as part of being imported. */
10651 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10653 complaint (_("child DW_TAG_imported_declaration expected "
10654 "- DIE at %s [in module %s]"),
10655 sect_offset_str (child_die
->sect_off
),
10656 objfile_name (objfile
));
10660 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10661 if (import_attr
== NULL
)
10663 complaint (_("Tag '%s' has no DW_AT_import"),
10664 dwarf_tag_name (child_die
->tag
));
10669 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10671 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10672 if (imported_name
== NULL
)
10674 complaint (_("child DW_TAG_imported_declaration has unknown "
10675 "imported name - DIE at %s [in module %s]"),
10676 sect_offset_str (child_die
->sect_off
),
10677 objfile_name (objfile
));
10681 excludes
.push_back (imported_name
);
10683 process_die (child_die
, cu
);
10686 add_using_directive (using_directives (cu
),
10690 imported_declaration
,
10693 &objfile
->objfile_obstack
);
10696 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10697 types, but gives them a size of zero. Starting with version 14,
10698 ICC is compatible with GCC. */
10701 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10703 if (!cu
->checked_producer
)
10704 check_producer (cu
);
10706 return cu
->producer_is_icc_lt_14
;
10709 /* ICC generates a DW_AT_type for C void functions. This was observed on
10710 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
10711 which says that void functions should not have a DW_AT_type. */
10714 producer_is_icc (struct dwarf2_cu
*cu
)
10716 if (!cu
->checked_producer
)
10717 check_producer (cu
);
10719 return cu
->producer_is_icc
;
10722 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
10723 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
10724 this, it was first present in GCC release 4.3.0. */
10727 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
10729 if (!cu
->checked_producer
)
10730 check_producer (cu
);
10732 return cu
->producer_is_gcc_lt_4_3
;
10735 static file_and_directory
10736 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
10738 file_and_directory res
;
10740 /* Find the filename. Do not use dwarf2_name here, since the filename
10741 is not a source language identifier. */
10742 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
10743 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
10745 if (res
.comp_dir
== NULL
10746 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
10747 && IS_ABSOLUTE_PATH (res
.name
))
10749 res
.comp_dir_storage
= ldirname (res
.name
);
10750 if (!res
.comp_dir_storage
.empty ())
10751 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
10753 if (res
.comp_dir
!= NULL
)
10755 /* Irix 6.2 native cc prepends <machine>.: to the compilation
10756 directory, get rid of it. */
10757 const char *cp
= strchr (res
.comp_dir
, ':');
10759 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
10760 res
.comp_dir
= cp
+ 1;
10763 if (res
.name
== NULL
)
10764 res
.name
= "<unknown>";
10769 /* Handle DW_AT_stmt_list for a compilation unit.
10770 DIE is the DW_TAG_compile_unit die for CU.
10771 COMP_DIR is the compilation directory. LOWPC is passed to
10772 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
10775 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
10776 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
10778 struct dwarf2_per_objfile
*dwarf2_per_objfile
10779 = cu
->per_cu
->dwarf2_per_objfile
;
10780 struct attribute
*attr
;
10781 struct line_header line_header_local
;
10782 hashval_t line_header_local_hash
;
10784 int decode_mapping
;
10786 gdb_assert (! cu
->per_cu
->is_debug_types
);
10788 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10792 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10794 /* The line header hash table is only created if needed (it exists to
10795 prevent redundant reading of the line table for partial_units).
10796 If we're given a partial_unit, we'll need it. If we're given a
10797 compile_unit, then use the line header hash table if it's already
10798 created, but don't create one just yet. */
10800 if (dwarf2_per_objfile
->per_bfd
->line_header_hash
== NULL
10801 && die
->tag
== DW_TAG_partial_unit
)
10803 dwarf2_per_objfile
->per_bfd
->line_header_hash
10804 .reset (htab_create_alloc (127, line_header_hash_voidp
,
10805 line_header_eq_voidp
,
10806 free_line_header_voidp
,
10810 line_header_local
.sect_off
= line_offset
;
10811 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
10812 line_header_local_hash
= line_header_hash (&line_header_local
);
10813 if (dwarf2_per_objfile
->per_bfd
->line_header_hash
!= NULL
)
10815 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->per_bfd
->line_header_hash
.get (),
10816 &line_header_local
,
10817 line_header_local_hash
, NO_INSERT
);
10819 /* For DW_TAG_compile_unit we need info like symtab::linetable which
10820 is not present in *SLOT (since if there is something in *SLOT then
10821 it will be for a partial_unit). */
10822 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
10824 gdb_assert (*slot
!= NULL
);
10825 cu
->line_header
= (struct line_header
*) *slot
;
10830 /* dwarf_decode_line_header does not yet provide sufficient information.
10831 We always have to call also dwarf_decode_lines for it. */
10832 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
10836 cu
->line_header
= lh
.release ();
10837 cu
->line_header_die_owner
= die
;
10839 if (dwarf2_per_objfile
->per_bfd
->line_header_hash
== NULL
)
10843 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->per_bfd
->line_header_hash
.get (),
10844 &line_header_local
,
10845 line_header_local_hash
, INSERT
);
10846 gdb_assert (slot
!= NULL
);
10848 if (slot
!= NULL
&& *slot
== NULL
)
10850 /* This newly decoded line number information unit will be owned
10851 by line_header_hash hash table. */
10852 *slot
= cu
->line_header
;
10853 cu
->line_header_die_owner
= NULL
;
10857 /* We cannot free any current entry in (*slot) as that struct line_header
10858 may be already used by multiple CUs. Create only temporary decoded
10859 line_header for this CU - it may happen at most once for each line
10860 number information unit. And if we're not using line_header_hash
10861 then this is what we want as well. */
10862 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
10864 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
10865 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
10870 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
10873 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10875 struct dwarf2_per_objfile
*dwarf2_per_objfile
10876 = cu
->per_cu
->dwarf2_per_objfile
;
10877 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10878 struct gdbarch
*gdbarch
= objfile
->arch ();
10879 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
10880 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
10881 struct attribute
*attr
;
10882 struct die_info
*child_die
;
10883 CORE_ADDR baseaddr
;
10885 prepare_one_comp_unit (cu
, die
, cu
->language
);
10886 baseaddr
= objfile
->text_section_offset ();
10888 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
10890 /* If we didn't find a lowpc, set it to highpc to avoid complaints
10891 from finish_block. */
10892 if (lowpc
== ((CORE_ADDR
) -1))
10894 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
10896 file_and_directory fnd
= find_file_and_directory (die
, cu
);
10898 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
10899 standardised yet. As a workaround for the language detection we fall
10900 back to the DW_AT_producer string. */
10901 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
10902 cu
->language
= language_opencl
;
10904 /* Similar hack for Go. */
10905 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
10906 set_cu_language (DW_LANG_Go
, cu
);
10908 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
10910 /* Decode line number information if present. We do this before
10911 processing child DIEs, so that the line header table is available
10912 for DW_AT_decl_file. */
10913 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
10915 /* Process all dies in compilation unit. */
10916 if (die
->child
!= NULL
)
10918 child_die
= die
->child
;
10919 while (child_die
&& child_die
->tag
)
10921 process_die (child_die
, cu
);
10922 child_die
= child_die
->sibling
;
10926 /* Decode macro information, if present. Dwarf 2 macro information
10927 refers to information in the line number info statement program
10928 header, so we can only read it if we've read the header
10930 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
10932 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
10933 if (attr
&& cu
->line_header
)
10935 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
10936 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
10938 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
10942 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
10943 if (attr
&& cu
->line_header
)
10945 unsigned int macro_offset
= DW_UNSND (attr
);
10947 dwarf_decode_macros (cu
, macro_offset
, 0);
10953 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
10955 struct type_unit_group
*tu_group
;
10957 struct attribute
*attr
;
10959 struct signatured_type
*sig_type
;
10961 gdb_assert (per_cu
->is_debug_types
);
10962 sig_type
= (struct signatured_type
*) per_cu
;
10964 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
10966 /* If we're using .gdb_index (includes -readnow) then
10967 per_cu->type_unit_group may not have been set up yet. */
10968 if (sig_type
->type_unit_group
== NULL
)
10969 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
10970 tu_group
= sig_type
->type_unit_group
;
10972 /* If we've already processed this stmt_list there's no real need to
10973 do it again, we could fake it and just recreate the part we need
10974 (file name,index -> symtab mapping). If data shows this optimization
10975 is useful we can do it then. */
10976 first_time
= tu_group
->compunit_symtab
== NULL
;
10978 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
10983 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10984 lh
= dwarf_decode_line_header (line_offset
, this);
10989 start_symtab ("", NULL
, 0);
10992 gdb_assert (tu_group
->symtabs
== NULL
);
10993 gdb_assert (m_builder
== nullptr);
10994 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
10995 m_builder
.reset (new struct buildsym_compunit
10996 (COMPUNIT_OBJFILE (cust
), "",
10997 COMPUNIT_DIRNAME (cust
),
10998 compunit_language (cust
),
11000 list_in_scope
= get_builder ()->get_file_symbols ();
11005 line_header
= lh
.release ();
11006 line_header_die_owner
= die
;
11010 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11012 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11013 still initializing it, and our caller (a few levels up)
11014 process_full_type_unit still needs to know if this is the first
11018 = XOBNEWVEC (&COMPUNIT_OBJFILE (cust
)->objfile_obstack
,
11019 struct symtab
*, line_header
->file_names_size ());
11021 auto &file_names
= line_header
->file_names ();
11022 for (i
= 0; i
< file_names
.size (); ++i
)
11024 file_entry
&fe
= file_names
[i
];
11025 dwarf2_start_subfile (this, fe
.name
,
11026 fe
.include_dir (line_header
));
11027 buildsym_compunit
*b
= get_builder ();
11028 if (b
->get_current_subfile ()->symtab
== NULL
)
11030 /* NOTE: start_subfile will recognize when it's been
11031 passed a file it has already seen. So we can't
11032 assume there's a simple mapping from
11033 cu->line_header->file_names to subfiles, plus
11034 cu->line_header->file_names may contain dups. */
11035 b
->get_current_subfile ()->symtab
11036 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11039 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11040 tu_group
->symtabs
[i
] = fe
.symtab
;
11045 gdb_assert (m_builder
== nullptr);
11046 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11047 m_builder
.reset (new struct buildsym_compunit
11048 (COMPUNIT_OBJFILE (cust
), "",
11049 COMPUNIT_DIRNAME (cust
),
11050 compunit_language (cust
),
11052 list_in_scope
= get_builder ()->get_file_symbols ();
11054 auto &file_names
= line_header
->file_names ();
11055 for (i
= 0; i
< file_names
.size (); ++i
)
11057 file_entry
&fe
= file_names
[i
];
11058 fe
.symtab
= tu_group
->symtabs
[i
];
11062 /* The main symtab is allocated last. Type units don't have DW_AT_name
11063 so they don't have a "real" (so to speak) symtab anyway.
11064 There is later code that will assign the main symtab to all symbols
11065 that don't have one. We need to handle the case of a symbol with a
11066 missing symtab (DW_AT_decl_file) anyway. */
11069 /* Process DW_TAG_type_unit.
11070 For TUs we want to skip the first top level sibling if it's not the
11071 actual type being defined by this TU. In this case the first top
11072 level sibling is there to provide context only. */
11075 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11077 struct die_info
*child_die
;
11079 prepare_one_comp_unit (cu
, die
, language_minimal
);
11081 /* Initialize (or reinitialize) the machinery for building symtabs.
11082 We do this before processing child DIEs, so that the line header table
11083 is available for DW_AT_decl_file. */
11084 cu
->setup_type_unit_groups (die
);
11086 if (die
->child
!= NULL
)
11088 child_die
= die
->child
;
11089 while (child_die
&& child_die
->tag
)
11091 process_die (child_die
, cu
);
11092 child_die
= child_die
->sibling
;
11099 http://gcc.gnu.org/wiki/DebugFission
11100 http://gcc.gnu.org/wiki/DebugFissionDWP
11102 To simplify handling of both DWO files ("object" files with the DWARF info)
11103 and DWP files (a file with the DWOs packaged up into one file), we treat
11104 DWP files as having a collection of virtual DWO files. */
11107 hash_dwo_file (const void *item
)
11109 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11112 hash
= htab_hash_string (dwo_file
->dwo_name
);
11113 if (dwo_file
->comp_dir
!= NULL
)
11114 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11119 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11121 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11122 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11124 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11126 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11127 return lhs
->comp_dir
== rhs
->comp_dir
;
11128 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11131 /* Allocate a hash table for DWO files. */
11134 allocate_dwo_file_hash_table ()
11136 auto delete_dwo_file
= [] (void *item
)
11138 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11143 return htab_up (htab_create_alloc (41,
11150 /* Lookup DWO file DWO_NAME. */
11153 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11154 const char *dwo_name
,
11155 const char *comp_dir
)
11157 struct dwo_file find_entry
;
11160 if (dwarf2_per_objfile
->per_bfd
->dwo_files
== NULL
)
11161 dwarf2_per_objfile
->per_bfd
->dwo_files
= allocate_dwo_file_hash_table ();
11163 find_entry
.dwo_name
= dwo_name
;
11164 find_entry
.comp_dir
= comp_dir
;
11165 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->dwo_files
.get (), &find_entry
,
11172 hash_dwo_unit (const void *item
)
11174 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11176 /* This drops the top 32 bits of the id, but is ok for a hash. */
11177 return dwo_unit
->signature
;
11181 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11183 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11184 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11186 /* The signature is assumed to be unique within the DWO file.
11187 So while object file CU dwo_id's always have the value zero,
11188 that's OK, assuming each object file DWO file has only one CU,
11189 and that's the rule for now. */
11190 return lhs
->signature
== rhs
->signature
;
11193 /* Allocate a hash table for DWO CUs,TUs.
11194 There is one of these tables for each of CUs,TUs for each DWO file. */
11197 allocate_dwo_unit_table ()
11199 /* Start out with a pretty small number.
11200 Generally DWO files contain only one CU and maybe some TUs. */
11201 return htab_up (htab_create_alloc (3,
11204 NULL
, xcalloc
, xfree
));
11207 /* die_reader_func for create_dwo_cu. */
11210 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11211 const gdb_byte
*info_ptr
,
11212 struct die_info
*comp_unit_die
,
11213 struct dwo_file
*dwo_file
,
11214 struct dwo_unit
*dwo_unit
)
11216 struct dwarf2_cu
*cu
= reader
->cu
;
11217 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11218 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11220 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11221 if (!signature
.has_value ())
11223 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11224 " its dwo_id [in module %s]"),
11225 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11229 dwo_unit
->dwo_file
= dwo_file
;
11230 dwo_unit
->signature
= *signature
;
11231 dwo_unit
->section
= section
;
11232 dwo_unit
->sect_off
= sect_off
;
11233 dwo_unit
->length
= cu
->per_cu
->length
;
11235 if (dwarf_read_debug
)
11236 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11237 sect_offset_str (sect_off
),
11238 hex_string (dwo_unit
->signature
));
11241 /* Create the dwo_units for the CUs in a DWO_FILE.
11242 Note: This function processes DWO files only, not DWP files. */
11245 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11246 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11247 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11249 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11250 const gdb_byte
*info_ptr
, *end_ptr
;
11252 section
.read (objfile
);
11253 info_ptr
= section
.buffer
;
11255 if (info_ptr
== NULL
)
11258 if (dwarf_read_debug
)
11260 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11261 section
.get_name (),
11262 section
.get_file_name ());
11265 end_ptr
= info_ptr
+ section
.size
;
11266 while (info_ptr
< end_ptr
)
11268 struct dwarf2_per_cu_data per_cu
;
11269 struct dwo_unit read_unit
{};
11270 struct dwo_unit
*dwo_unit
;
11272 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11274 memset (&per_cu
, 0, sizeof (per_cu
));
11275 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11276 per_cu
.is_debug_types
= 0;
11277 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11278 per_cu
.section
= §ion
;
11280 cutu_reader
reader (&per_cu
, cu
, &dwo_file
);
11281 if (!reader
.dummy_p
)
11282 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11283 &dwo_file
, &read_unit
);
11284 info_ptr
+= per_cu
.length
;
11286 // If the unit could not be parsed, skip it.
11287 if (read_unit
.dwo_file
== NULL
)
11290 if (cus_htab
== NULL
)
11291 cus_htab
= allocate_dwo_unit_table ();
11293 dwo_unit
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
11295 *dwo_unit
= read_unit
;
11296 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11297 gdb_assert (slot
!= NULL
);
11300 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11301 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11303 complaint (_("debug cu entry at offset %s is duplicate to"
11304 " the entry at offset %s, signature %s"),
11305 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11306 hex_string (dwo_unit
->signature
));
11308 *slot
= (void *)dwo_unit
;
11312 /* DWP file .debug_{cu,tu}_index section format:
11313 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11317 Both index sections have the same format, and serve to map a 64-bit
11318 signature to a set of section numbers. Each section begins with a header,
11319 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11320 indexes, and a pool of 32-bit section numbers. The index sections will be
11321 aligned at 8-byte boundaries in the file.
11323 The index section header consists of:
11325 V, 32 bit version number
11327 N, 32 bit number of compilation units or type units in the index
11328 M, 32 bit number of slots in the hash table
11330 Numbers are recorded using the byte order of the application binary.
11332 The hash table begins at offset 16 in the section, and consists of an array
11333 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11334 order of the application binary). Unused slots in the hash table are 0.
11335 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11337 The parallel table begins immediately after the hash table
11338 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11339 array of 32-bit indexes (using the byte order of the application binary),
11340 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11341 table contains a 32-bit index into the pool of section numbers. For unused
11342 hash table slots, the corresponding entry in the parallel table will be 0.
11344 The pool of section numbers begins immediately following the hash table
11345 (at offset 16 + 12 * M from the beginning of the section). The pool of
11346 section numbers consists of an array of 32-bit words (using the byte order
11347 of the application binary). Each item in the array is indexed starting
11348 from 0. The hash table entry provides the index of the first section
11349 number in the set. Additional section numbers in the set follow, and the
11350 set is terminated by a 0 entry (section number 0 is not used in ELF).
11352 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11353 section must be the first entry in the set, and the .debug_abbrev.dwo must
11354 be the second entry. Other members of the set may follow in any order.
11360 DWP Version 2 combines all the .debug_info, etc. sections into one,
11361 and the entries in the index tables are now offsets into these sections.
11362 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11365 Index Section Contents:
11367 Hash Table of Signatures dwp_hash_table.hash_table
11368 Parallel Table of Indices dwp_hash_table.unit_table
11369 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11370 Table of Section Sizes dwp_hash_table.v2.sizes
11372 The index section header consists of:
11374 V, 32 bit version number
11375 L, 32 bit number of columns in the table of section offsets
11376 N, 32 bit number of compilation units or type units in the index
11377 M, 32 bit number of slots in the hash table
11379 Numbers are recorded using the byte order of the application binary.
11381 The hash table has the same format as version 1.
11382 The parallel table of indices has the same format as version 1,
11383 except that the entries are origin-1 indices into the table of sections
11384 offsets and the table of section sizes.
11386 The table of offsets begins immediately following the parallel table
11387 (at offset 16 + 12 * M from the beginning of the section). The table is
11388 a two-dimensional array of 32-bit words (using the byte order of the
11389 application binary), with L columns and N+1 rows, in row-major order.
11390 Each row in the array is indexed starting from 0. The first row provides
11391 a key to the remaining rows: each column in this row provides an identifier
11392 for a debug section, and the offsets in the same column of subsequent rows
11393 refer to that section. The section identifiers are:
11395 DW_SECT_INFO 1 .debug_info.dwo
11396 DW_SECT_TYPES 2 .debug_types.dwo
11397 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11398 DW_SECT_LINE 4 .debug_line.dwo
11399 DW_SECT_LOC 5 .debug_loc.dwo
11400 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11401 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11402 DW_SECT_MACRO 8 .debug_macro.dwo
11404 The offsets provided by the CU and TU index sections are the base offsets
11405 for the contributions made by each CU or TU to the corresponding section
11406 in the package file. Each CU and TU header contains an abbrev_offset
11407 field, used to find the abbreviations table for that CU or TU within the
11408 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11409 be interpreted as relative to the base offset given in the index section.
11410 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11411 should be interpreted as relative to the base offset for .debug_line.dwo,
11412 and offsets into other debug sections obtained from DWARF attributes should
11413 also be interpreted as relative to the corresponding base offset.
11415 The table of sizes begins immediately following the table of offsets.
11416 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11417 with L columns and N rows, in row-major order. Each row in the array is
11418 indexed starting from 1 (row 0 is shared by the two tables).
11422 Hash table lookup is handled the same in version 1 and 2:
11424 We assume that N and M will not exceed 2^32 - 1.
11425 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11427 Given a 64-bit compilation unit signature or a type signature S, an entry
11428 in the hash table is located as follows:
11430 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11431 the low-order k bits all set to 1.
11433 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11435 3) If the hash table entry at index H matches the signature, use that
11436 entry. If the hash table entry at index H is unused (all zeroes),
11437 terminate the search: the signature is not present in the table.
11439 4) Let H = (H + H') modulo M. Repeat at Step 3.
11441 Because M > N and H' and M are relatively prime, the search is guaranteed
11442 to stop at an unused slot or find the match. */
11444 /* Create a hash table to map DWO IDs to their CU/TU entry in
11445 .debug_{info,types}.dwo in DWP_FILE.
11446 Returns NULL if there isn't one.
11447 Note: This function processes DWP files only, not DWO files. */
11449 static struct dwp_hash_table
*
11450 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11451 struct dwp_file
*dwp_file
, int is_debug_types
)
11453 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11454 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11455 const gdb_byte
*index_ptr
, *index_end
;
11456 struct dwarf2_section_info
*index
;
11457 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11458 struct dwp_hash_table
*htab
;
11460 if (is_debug_types
)
11461 index
= &dwp_file
->sections
.tu_index
;
11463 index
= &dwp_file
->sections
.cu_index
;
11465 if (index
->empty ())
11467 index
->read (objfile
);
11469 index_ptr
= index
->buffer
;
11470 index_end
= index_ptr
+ index
->size
;
11472 version
= read_4_bytes (dbfd
, index_ptr
);
11475 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11479 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11481 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11484 if (version
!= 1 && version
!= 2)
11486 error (_("Dwarf Error: unsupported DWP file version (%s)"
11487 " [in module %s]"),
11488 pulongest (version
), dwp_file
->name
);
11490 if (nr_slots
!= (nr_slots
& -nr_slots
))
11492 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11493 " is not power of 2 [in module %s]"),
11494 pulongest (nr_slots
), dwp_file
->name
);
11497 htab
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwp_hash_table
);
11498 htab
->version
= version
;
11499 htab
->nr_columns
= nr_columns
;
11500 htab
->nr_units
= nr_units
;
11501 htab
->nr_slots
= nr_slots
;
11502 htab
->hash_table
= index_ptr
;
11503 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11505 /* Exit early if the table is empty. */
11506 if (nr_slots
== 0 || nr_units
== 0
11507 || (version
== 2 && nr_columns
== 0))
11509 /* All must be zero. */
11510 if (nr_slots
!= 0 || nr_units
!= 0
11511 || (version
== 2 && nr_columns
!= 0))
11513 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11514 " all zero [in modules %s]"),
11522 htab
->section_pool
.v1
.indices
=
11523 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11524 /* It's harder to decide whether the section is too small in v1.
11525 V1 is deprecated anyway so we punt. */
11529 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11530 int *ids
= htab
->section_pool
.v2
.section_ids
;
11531 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11532 /* Reverse map for error checking. */
11533 int ids_seen
[DW_SECT_MAX
+ 1];
11536 if (nr_columns
< 2)
11538 error (_("Dwarf Error: bad DWP hash table, too few columns"
11539 " in section table [in module %s]"),
11542 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11544 error (_("Dwarf Error: bad DWP hash table, too many columns"
11545 " in section table [in module %s]"),
11548 memset (ids
, 255, sizeof_ids
);
11549 memset (ids_seen
, 255, sizeof (ids_seen
));
11550 for (i
= 0; i
< nr_columns
; ++i
)
11552 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11554 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11556 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11557 " in section table [in module %s]"),
11558 id
, dwp_file
->name
);
11560 if (ids_seen
[id
] != -1)
11562 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11563 " id %d in section table [in module %s]"),
11564 id
, dwp_file
->name
);
11569 /* Must have exactly one info or types section. */
11570 if (((ids_seen
[DW_SECT_INFO
] != -1)
11571 + (ids_seen
[DW_SECT_TYPES
] != -1))
11574 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11575 " DWO info/types section [in module %s]"),
11578 /* Must have an abbrev section. */
11579 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11581 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11582 " section [in module %s]"),
11585 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11586 htab
->section_pool
.v2
.sizes
=
11587 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11588 * nr_units
* nr_columns
);
11589 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11590 * nr_units
* nr_columns
))
11593 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11594 " [in module %s]"),
11602 /* Update SECTIONS with the data from SECTP.
11604 This function is like the other "locate" section routines that are
11605 passed to bfd_map_over_sections, but in this context the sections to
11606 read comes from the DWP V1 hash table, not the full ELF section table.
11608 The result is non-zero for success, or zero if an error was found. */
11611 locate_v1_virtual_dwo_sections (asection
*sectp
,
11612 struct virtual_v1_dwo_sections
*sections
)
11614 const struct dwop_section_names
*names
= &dwop_section_names
;
11616 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11618 /* There can be only one. */
11619 if (sections
->abbrev
.s
.section
!= NULL
)
11621 sections
->abbrev
.s
.section
= sectp
;
11622 sections
->abbrev
.size
= bfd_section_size (sectp
);
11624 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11625 || section_is_p (sectp
->name
, &names
->types_dwo
))
11627 /* There can be only one. */
11628 if (sections
->info_or_types
.s
.section
!= NULL
)
11630 sections
->info_or_types
.s
.section
= sectp
;
11631 sections
->info_or_types
.size
= bfd_section_size (sectp
);
11633 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11635 /* There can be only one. */
11636 if (sections
->line
.s
.section
!= NULL
)
11638 sections
->line
.s
.section
= sectp
;
11639 sections
->line
.size
= bfd_section_size (sectp
);
11641 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11643 /* There can be only one. */
11644 if (sections
->loc
.s
.section
!= NULL
)
11646 sections
->loc
.s
.section
= sectp
;
11647 sections
->loc
.size
= bfd_section_size (sectp
);
11649 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11651 /* There can be only one. */
11652 if (sections
->macinfo
.s
.section
!= NULL
)
11654 sections
->macinfo
.s
.section
= sectp
;
11655 sections
->macinfo
.size
= bfd_section_size (sectp
);
11657 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11659 /* There can be only one. */
11660 if (sections
->macro
.s
.section
!= NULL
)
11662 sections
->macro
.s
.section
= sectp
;
11663 sections
->macro
.size
= bfd_section_size (sectp
);
11665 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11667 /* There can be only one. */
11668 if (sections
->str_offsets
.s
.section
!= NULL
)
11670 sections
->str_offsets
.s
.section
= sectp
;
11671 sections
->str_offsets
.size
= bfd_section_size (sectp
);
11675 /* No other kind of section is valid. */
11682 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11683 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11684 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11685 This is for DWP version 1 files. */
11687 static struct dwo_unit
*
11688 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11689 struct dwp_file
*dwp_file
,
11690 uint32_t unit_index
,
11691 const char *comp_dir
,
11692 ULONGEST signature
, int is_debug_types
)
11694 const struct dwp_hash_table
*dwp_htab
=
11695 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11696 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11697 const char *kind
= is_debug_types
? "TU" : "CU";
11698 struct dwo_file
*dwo_file
;
11699 struct dwo_unit
*dwo_unit
;
11700 struct virtual_v1_dwo_sections sections
;
11701 void **dwo_file_slot
;
11704 gdb_assert (dwp_file
->version
== 1);
11706 if (dwarf_read_debug
)
11708 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
11710 pulongest (unit_index
), hex_string (signature
),
11714 /* Fetch the sections of this DWO unit.
11715 Put a limit on the number of sections we look for so that bad data
11716 doesn't cause us to loop forever. */
11718 #define MAX_NR_V1_DWO_SECTIONS \
11719 (1 /* .debug_info or .debug_types */ \
11720 + 1 /* .debug_abbrev */ \
11721 + 1 /* .debug_line */ \
11722 + 1 /* .debug_loc */ \
11723 + 1 /* .debug_str_offsets */ \
11724 + 1 /* .debug_macro or .debug_macinfo */ \
11725 + 1 /* trailing zero */)
11727 memset (§ions
, 0, sizeof (sections
));
11729 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
11732 uint32_t section_nr
=
11733 read_4_bytes (dbfd
,
11734 dwp_htab
->section_pool
.v1
.indices
11735 + (unit_index
+ i
) * sizeof (uint32_t));
11737 if (section_nr
== 0)
11739 if (section_nr
>= dwp_file
->num_sections
)
11741 error (_("Dwarf Error: bad DWP hash table, section number too large"
11742 " [in module %s]"),
11746 sectp
= dwp_file
->elf_sections
[section_nr
];
11747 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
11749 error (_("Dwarf Error: bad DWP hash table, invalid section found"
11750 " [in module %s]"),
11756 || sections
.info_or_types
.empty ()
11757 || sections
.abbrev
.empty ())
11759 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
11760 " [in module %s]"),
11763 if (i
== MAX_NR_V1_DWO_SECTIONS
)
11765 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
11766 " [in module %s]"),
11770 /* It's easier for the rest of the code if we fake a struct dwo_file and
11771 have dwo_unit "live" in that. At least for now.
11773 The DWP file can be made up of a random collection of CUs and TUs.
11774 However, for each CU + set of TUs that came from the same original DWO
11775 file, we can combine them back into a virtual DWO file to save space
11776 (fewer struct dwo_file objects to allocate). Remember that for really
11777 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11779 std::string virtual_dwo_name
=
11780 string_printf ("virtual-dwo/%d-%d-%d-%d",
11781 sections
.abbrev
.get_id (),
11782 sections
.line
.get_id (),
11783 sections
.loc
.get_id (),
11784 sections
.str_offsets
.get_id ());
11785 /* Can we use an existing virtual DWO file? */
11786 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11787 virtual_dwo_name
.c_str (),
11789 /* Create one if necessary. */
11790 if (*dwo_file_slot
== NULL
)
11792 if (dwarf_read_debug
)
11794 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11795 virtual_dwo_name
.c_str ());
11797 dwo_file
= new struct dwo_file
;
11798 dwo_file
->dwo_name
= dwarf2_per_objfile
->objfile
->intern (virtual_dwo_name
);
11799 dwo_file
->comp_dir
= comp_dir
;
11800 dwo_file
->sections
.abbrev
= sections
.abbrev
;
11801 dwo_file
->sections
.line
= sections
.line
;
11802 dwo_file
->sections
.loc
= sections
.loc
;
11803 dwo_file
->sections
.macinfo
= sections
.macinfo
;
11804 dwo_file
->sections
.macro
= sections
.macro
;
11805 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
11806 /* The "str" section is global to the entire DWP file. */
11807 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11808 /* The info or types section is assigned below to dwo_unit,
11809 there's no need to record it in dwo_file.
11810 Also, we can't simply record type sections in dwo_file because
11811 we record a pointer into the vector in dwo_unit. As we collect more
11812 types we'll grow the vector and eventually have to reallocate space
11813 for it, invalidating all copies of pointers into the previous
11815 *dwo_file_slot
= dwo_file
;
11819 if (dwarf_read_debug
)
11821 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11822 virtual_dwo_name
.c_str ());
11824 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11827 dwo_unit
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
11828 dwo_unit
->dwo_file
= dwo_file
;
11829 dwo_unit
->signature
= signature
;
11830 dwo_unit
->section
=
11831 XOBNEW (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
11832 *dwo_unit
->section
= sections
.info_or_types
;
11833 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11838 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
11839 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
11840 piece within that section used by a TU/CU, return a virtual section
11841 of just that piece. */
11843 static struct dwarf2_section_info
11844 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11845 struct dwarf2_section_info
*section
,
11846 bfd_size_type offset
, bfd_size_type size
)
11848 struct dwarf2_section_info result
;
11851 gdb_assert (section
!= NULL
);
11852 gdb_assert (!section
->is_virtual
);
11854 memset (&result
, 0, sizeof (result
));
11855 result
.s
.containing_section
= section
;
11856 result
.is_virtual
= true;
11861 sectp
= section
->get_bfd_section ();
11863 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
11864 bounds of the real section. This is a pretty-rare event, so just
11865 flag an error (easier) instead of a warning and trying to cope. */
11867 || offset
+ size
> bfd_section_size (sectp
))
11869 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
11870 " in section %s [in module %s]"),
11871 sectp
? bfd_section_name (sectp
) : "<unknown>",
11872 objfile_name (dwarf2_per_objfile
->objfile
));
11875 result
.virtual_offset
= offset
;
11876 result
.size
= size
;
11880 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11881 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11882 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11883 This is for DWP version 2 files. */
11885 static struct dwo_unit
*
11886 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11887 struct dwp_file
*dwp_file
,
11888 uint32_t unit_index
,
11889 const char *comp_dir
,
11890 ULONGEST signature
, int is_debug_types
)
11892 const struct dwp_hash_table
*dwp_htab
=
11893 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11894 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11895 const char *kind
= is_debug_types
? "TU" : "CU";
11896 struct dwo_file
*dwo_file
;
11897 struct dwo_unit
*dwo_unit
;
11898 struct virtual_v2_dwo_sections sections
;
11899 void **dwo_file_slot
;
11902 gdb_assert (dwp_file
->version
== 2);
11904 if (dwarf_read_debug
)
11906 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
11908 pulongest (unit_index
), hex_string (signature
),
11912 /* Fetch the section offsets of this DWO unit. */
11914 memset (§ions
, 0, sizeof (sections
));
11916 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
11918 uint32_t offset
= read_4_bytes (dbfd
,
11919 dwp_htab
->section_pool
.v2
.offsets
11920 + (((unit_index
- 1) * dwp_htab
->nr_columns
11922 * sizeof (uint32_t)));
11923 uint32_t size
= read_4_bytes (dbfd
,
11924 dwp_htab
->section_pool
.v2
.sizes
11925 + (((unit_index
- 1) * dwp_htab
->nr_columns
11927 * sizeof (uint32_t)));
11929 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
11932 case DW_SECT_TYPES
:
11933 sections
.info_or_types_offset
= offset
;
11934 sections
.info_or_types_size
= size
;
11936 case DW_SECT_ABBREV
:
11937 sections
.abbrev_offset
= offset
;
11938 sections
.abbrev_size
= size
;
11941 sections
.line_offset
= offset
;
11942 sections
.line_size
= size
;
11945 sections
.loc_offset
= offset
;
11946 sections
.loc_size
= size
;
11948 case DW_SECT_STR_OFFSETS
:
11949 sections
.str_offsets_offset
= offset
;
11950 sections
.str_offsets_size
= size
;
11952 case DW_SECT_MACINFO
:
11953 sections
.macinfo_offset
= offset
;
11954 sections
.macinfo_size
= size
;
11956 case DW_SECT_MACRO
:
11957 sections
.macro_offset
= offset
;
11958 sections
.macro_size
= size
;
11963 /* It's easier for the rest of the code if we fake a struct dwo_file and
11964 have dwo_unit "live" in that. At least for now.
11966 The DWP file can be made up of a random collection of CUs and TUs.
11967 However, for each CU + set of TUs that came from the same original DWO
11968 file, we can combine them back into a virtual DWO file to save space
11969 (fewer struct dwo_file objects to allocate). Remember that for really
11970 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11972 std::string virtual_dwo_name
=
11973 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
11974 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
11975 (long) (sections
.line_size
? sections
.line_offset
: 0),
11976 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
11977 (long) (sections
.str_offsets_size
11978 ? sections
.str_offsets_offset
: 0));
11979 /* Can we use an existing virtual DWO file? */
11980 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11981 virtual_dwo_name
.c_str (),
11983 /* Create one if necessary. */
11984 if (*dwo_file_slot
== NULL
)
11986 if (dwarf_read_debug
)
11988 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11989 virtual_dwo_name
.c_str ());
11991 dwo_file
= new struct dwo_file
;
11992 dwo_file
->dwo_name
= dwarf2_per_objfile
->objfile
->intern (virtual_dwo_name
);
11993 dwo_file
->comp_dir
= comp_dir
;
11994 dwo_file
->sections
.abbrev
=
11995 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
11996 sections
.abbrev_offset
, sections
.abbrev_size
);
11997 dwo_file
->sections
.line
=
11998 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
11999 sections
.line_offset
, sections
.line_size
);
12000 dwo_file
->sections
.loc
=
12001 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12002 sections
.loc_offset
, sections
.loc_size
);
12003 dwo_file
->sections
.macinfo
=
12004 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12005 sections
.macinfo_offset
, sections
.macinfo_size
);
12006 dwo_file
->sections
.macro
=
12007 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12008 sections
.macro_offset
, sections
.macro_size
);
12009 dwo_file
->sections
.str_offsets
=
12010 create_dwp_v2_section (dwarf2_per_objfile
,
12011 &dwp_file
->sections
.str_offsets
,
12012 sections
.str_offsets_offset
,
12013 sections
.str_offsets_size
);
12014 /* The "str" section is global to the entire DWP file. */
12015 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12016 /* The info or types section is assigned below to dwo_unit,
12017 there's no need to record it in dwo_file.
12018 Also, we can't simply record type sections in dwo_file because
12019 we record a pointer into the vector in dwo_unit. As we collect more
12020 types we'll grow the vector and eventually have to reallocate space
12021 for it, invalidating all copies of pointers into the previous
12023 *dwo_file_slot
= dwo_file
;
12027 if (dwarf_read_debug
)
12029 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12030 virtual_dwo_name
.c_str ());
12032 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12035 dwo_unit
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
12036 dwo_unit
->dwo_file
= dwo_file
;
12037 dwo_unit
->signature
= signature
;
12038 dwo_unit
->section
=
12039 XOBNEW (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
12040 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12042 ? &dwp_file
->sections
.types
12043 : &dwp_file
->sections
.info
,
12044 sections
.info_or_types_offset
,
12045 sections
.info_or_types_size
);
12046 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12051 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12052 Returns NULL if the signature isn't found. */
12054 static struct dwo_unit
*
12055 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12056 struct dwp_file
*dwp_file
, const char *comp_dir
,
12057 ULONGEST signature
, int is_debug_types
)
12059 const struct dwp_hash_table
*dwp_htab
=
12060 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12061 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12062 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12063 uint32_t hash
= signature
& mask
;
12064 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12067 struct dwo_unit find_dwo_cu
;
12069 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12070 find_dwo_cu
.signature
= signature
;
12071 slot
= htab_find_slot (is_debug_types
12072 ? dwp_file
->loaded_tus
.get ()
12073 : dwp_file
->loaded_cus
.get (),
12074 &find_dwo_cu
, INSERT
);
12077 return (struct dwo_unit
*) *slot
;
12079 /* Use a for loop so that we don't loop forever on bad debug info. */
12080 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12082 ULONGEST signature_in_table
;
12084 signature_in_table
=
12085 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12086 if (signature_in_table
== signature
)
12088 uint32_t unit_index
=
12089 read_4_bytes (dbfd
,
12090 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12092 if (dwp_file
->version
== 1)
12094 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12095 dwp_file
, unit_index
,
12096 comp_dir
, signature
,
12101 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12102 dwp_file
, unit_index
,
12103 comp_dir
, signature
,
12106 return (struct dwo_unit
*) *slot
;
12108 if (signature_in_table
== 0)
12110 hash
= (hash
+ hash2
) & mask
;
12113 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12114 " [in module %s]"),
12118 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12119 Open the file specified by FILE_NAME and hand it off to BFD for
12120 preliminary analysis. Return a newly initialized bfd *, which
12121 includes a canonicalized copy of FILE_NAME.
12122 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12123 SEARCH_CWD is true if the current directory is to be searched.
12124 It will be searched before debug-file-directory.
12125 If successful, the file is added to the bfd include table of the
12126 objfile's bfd (see gdb_bfd_record_inclusion).
12127 If unable to find/open the file, return NULL.
12128 NOTE: This function is derived from symfile_bfd_open. */
12130 static gdb_bfd_ref_ptr
12131 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12132 const char *file_name
, int is_dwp
, int search_cwd
)
12135 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12136 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12137 to debug_file_directory. */
12138 const char *search_path
;
12139 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12141 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12144 if (*debug_file_directory
!= '\0')
12146 search_path_holder
.reset (concat (".", dirname_separator_string
,
12147 debug_file_directory
,
12149 search_path
= search_path_holder
.get ();
12155 search_path
= debug_file_directory
;
12157 openp_flags flags
= OPF_RETURN_REALPATH
;
12159 flags
|= OPF_SEARCH_IN_PATH
;
12161 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12162 desc
= openp (search_path
, flags
, file_name
,
12163 O_RDONLY
| O_BINARY
, &absolute_name
);
12167 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12169 if (sym_bfd
== NULL
)
12171 bfd_set_cacheable (sym_bfd
.get (), 1);
12173 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12176 /* Success. Record the bfd as having been included by the objfile's bfd.
12177 This is important because things like demangled_names_hash lives in the
12178 objfile's per_bfd space and may have references to things like symbol
12179 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12180 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12185 /* Try to open DWO file FILE_NAME.
12186 COMP_DIR is the DW_AT_comp_dir attribute.
12187 The result is the bfd handle of the file.
12188 If there is a problem finding or opening the file, return NULL.
12189 Upon success, the canonicalized path of the file is stored in the bfd,
12190 same as symfile_bfd_open. */
12192 static gdb_bfd_ref_ptr
12193 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12194 const char *file_name
, const char *comp_dir
)
12196 if (IS_ABSOLUTE_PATH (file_name
))
12197 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12198 0 /*is_dwp*/, 0 /*search_cwd*/);
12200 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12202 if (comp_dir
!= NULL
)
12204 gdb::unique_xmalloc_ptr
<char> path_to_try
12205 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12207 /* NOTE: If comp_dir is a relative path, this will also try the
12208 search path, which seems useful. */
12209 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12210 path_to_try
.get (),
12212 1 /*search_cwd*/));
12217 /* That didn't work, try debug-file-directory, which, despite its name,
12218 is a list of paths. */
12220 if (*debug_file_directory
== '\0')
12223 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12224 0 /*is_dwp*/, 1 /*search_cwd*/);
12227 /* This function is mapped across the sections and remembers the offset and
12228 size of each of the DWO debugging sections we are interested in. */
12231 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12233 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12234 const struct dwop_section_names
*names
= &dwop_section_names
;
12236 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12238 dwo_sections
->abbrev
.s
.section
= sectp
;
12239 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12241 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12243 dwo_sections
->info
.s
.section
= sectp
;
12244 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12246 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12248 dwo_sections
->line
.s
.section
= sectp
;
12249 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12251 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12253 dwo_sections
->loc
.s
.section
= sectp
;
12254 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12256 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12258 dwo_sections
->loclists
.s
.section
= sectp
;
12259 dwo_sections
->loclists
.size
= bfd_section_size (sectp
);
12261 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12263 dwo_sections
->macinfo
.s
.section
= sectp
;
12264 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12266 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12268 dwo_sections
->macro
.s
.section
= sectp
;
12269 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12271 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12273 dwo_sections
->str
.s
.section
= sectp
;
12274 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12276 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12278 dwo_sections
->str_offsets
.s
.section
= sectp
;
12279 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12281 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12283 struct dwarf2_section_info type_section
;
12285 memset (&type_section
, 0, sizeof (type_section
));
12286 type_section
.s
.section
= sectp
;
12287 type_section
.size
= bfd_section_size (sectp
);
12288 dwo_sections
->types
.push_back (type_section
);
12292 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12293 by PER_CU. This is for the non-DWP case.
12294 The result is NULL if DWO_NAME can't be found. */
12296 static struct dwo_file
*
12297 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12298 const char *dwo_name
, const char *comp_dir
)
12300 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12302 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12305 if (dwarf_read_debug
)
12306 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12310 dwo_file_up
dwo_file (new struct dwo_file
);
12311 dwo_file
->dwo_name
= dwo_name
;
12312 dwo_file
->comp_dir
= comp_dir
;
12313 dwo_file
->dbfd
= std::move (dbfd
);
12315 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12316 &dwo_file
->sections
);
12318 create_cus_hash_table (dwarf2_per_objfile
, per_cu
->cu
, *dwo_file
,
12319 dwo_file
->sections
.info
, dwo_file
->cus
);
12321 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12322 dwo_file
->sections
.types
, dwo_file
->tus
);
12324 if (dwarf_read_debug
)
12325 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12327 return dwo_file
.release ();
12330 /* This function is mapped across the sections and remembers the offset and
12331 size of each of the DWP debugging sections common to version 1 and 2 that
12332 we are interested in. */
12335 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12336 void *dwp_file_ptr
)
12338 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12339 const struct dwop_section_names
*names
= &dwop_section_names
;
12340 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12342 /* Record the ELF section number for later lookup: this is what the
12343 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12344 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12345 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12347 /* Look for specific sections that we need. */
12348 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12350 dwp_file
->sections
.str
.s
.section
= sectp
;
12351 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12353 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12355 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12356 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12358 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12360 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12361 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12365 /* This function is mapped across the sections and remembers the offset and
12366 size of each of the DWP version 2 debugging sections that we are interested
12367 in. This is split into a separate function because we don't know if we
12368 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12371 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12373 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12374 const struct dwop_section_names
*names
= &dwop_section_names
;
12375 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12377 /* Record the ELF section number for later lookup: this is what the
12378 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12379 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12380 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12382 /* Look for specific sections that we need. */
12383 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12385 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12386 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12388 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12390 dwp_file
->sections
.info
.s
.section
= sectp
;
12391 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12393 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12395 dwp_file
->sections
.line
.s
.section
= sectp
;
12396 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12398 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12400 dwp_file
->sections
.loc
.s
.section
= sectp
;
12401 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12403 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12405 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12406 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12408 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12410 dwp_file
->sections
.macro
.s
.section
= sectp
;
12411 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12413 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12415 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12416 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12418 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12420 dwp_file
->sections
.types
.s
.section
= sectp
;
12421 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
12425 /* Hash function for dwp_file loaded CUs/TUs. */
12428 hash_dwp_loaded_cutus (const void *item
)
12430 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
12432 /* This drops the top 32 bits of the signature, but is ok for a hash. */
12433 return dwo_unit
->signature
;
12436 /* Equality function for dwp_file loaded CUs/TUs. */
12439 eq_dwp_loaded_cutus (const void *a
, const void *b
)
12441 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
12442 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
12444 return dua
->signature
== dub
->signature
;
12447 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
12450 allocate_dwp_loaded_cutus_table ()
12452 return htab_up (htab_create_alloc (3,
12453 hash_dwp_loaded_cutus
,
12454 eq_dwp_loaded_cutus
,
12455 NULL
, xcalloc
, xfree
));
12458 /* Try to open DWP file FILE_NAME.
12459 The result is the bfd handle of the file.
12460 If there is a problem finding or opening the file, return NULL.
12461 Upon success, the canonicalized path of the file is stored in the bfd,
12462 same as symfile_bfd_open. */
12464 static gdb_bfd_ref_ptr
12465 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12466 const char *file_name
)
12468 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12470 1 /*search_cwd*/));
12474 /* Work around upstream bug 15652.
12475 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
12476 [Whether that's a "bug" is debatable, but it is getting in our way.]
12477 We have no real idea where the dwp file is, because gdb's realpath-ing
12478 of the executable's path may have discarded the needed info.
12479 [IWBN if the dwp file name was recorded in the executable, akin to
12480 .gnu_debuglink, but that doesn't exist yet.]
12481 Strip the directory from FILE_NAME and search again. */
12482 if (*debug_file_directory
!= '\0')
12484 /* Don't implicitly search the current directory here.
12485 If the user wants to search "." to handle this case,
12486 it must be added to debug-file-directory. */
12487 return try_open_dwop_file (dwarf2_per_objfile
,
12488 lbasename (file_name
), 1 /*is_dwp*/,
12495 /* Initialize the use of the DWP file for the current objfile.
12496 By convention the name of the DWP file is ${objfile}.dwp.
12497 The result is NULL if it can't be found. */
12499 static std::unique_ptr
<struct dwp_file
>
12500 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12502 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12504 /* Try to find first .dwp for the binary file before any symbolic links
12507 /* If the objfile is a debug file, find the name of the real binary
12508 file and get the name of dwp file from there. */
12509 std::string dwp_name
;
12510 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
12512 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
12513 const char *backlink_basename
= lbasename (backlink
->original_name
);
12515 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
12518 dwp_name
= objfile
->original_name
;
12520 dwp_name
+= ".dwp";
12522 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
12524 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
12526 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
12527 dwp_name
= objfile_name (objfile
);
12528 dwp_name
+= ".dwp";
12529 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
12534 if (dwarf_read_debug
)
12535 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
12536 return std::unique_ptr
<dwp_file
> ();
12539 const char *name
= bfd_get_filename (dbfd
.get ());
12540 std::unique_ptr
<struct dwp_file
> dwp_file
12541 (new struct dwp_file (name
, std::move (dbfd
)));
12543 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
12544 dwp_file
->elf_sections
=
12545 OBSTACK_CALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
12546 dwp_file
->num_sections
, asection
*);
12548 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12549 dwarf2_locate_common_dwp_sections
,
12552 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12555 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12558 /* The DWP file version is stored in the hash table. Oh well. */
12559 if (dwp_file
->cus
&& dwp_file
->tus
12560 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
12562 /* Technically speaking, we should try to limp along, but this is
12563 pretty bizarre. We use pulongest here because that's the established
12564 portability solution (e.g, we cannot use %u for uint32_t). */
12565 error (_("Dwarf Error: DWP file CU version %s doesn't match"
12566 " TU version %s [in DWP file %s]"),
12567 pulongest (dwp_file
->cus
->version
),
12568 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12572 dwp_file
->version
= dwp_file
->cus
->version
;
12573 else if (dwp_file
->tus
)
12574 dwp_file
->version
= dwp_file
->tus
->version
;
12576 dwp_file
->version
= 2;
12578 if (dwp_file
->version
== 2)
12579 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12580 dwarf2_locate_v2_dwp_sections
,
12583 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table ();
12584 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table ();
12586 if (dwarf_read_debug
)
12588 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12589 fprintf_unfiltered (gdb_stdlog
,
12590 " %s CUs, %s TUs\n",
12591 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12592 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12598 /* Wrapper around open_and_init_dwp_file, only open it once. */
12600 static struct dwp_file
*
12601 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12603 if (! dwarf2_per_objfile
->per_bfd
->dwp_checked
)
12605 dwarf2_per_objfile
->per_bfd
->dwp_file
12606 = open_and_init_dwp_file (dwarf2_per_objfile
);
12607 dwarf2_per_objfile
->per_bfd
->dwp_checked
= 1;
12609 return dwarf2_per_objfile
->per_bfd
->dwp_file
.get ();
12612 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12613 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12614 or in the DWP file for the objfile, referenced by THIS_UNIT.
12615 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12616 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12618 This is called, for example, when wanting to read a variable with a
12619 complex location. Therefore we don't want to do file i/o for every call.
12620 Therefore we don't want to look for a DWO file on every call.
12621 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12622 then we check if we've already seen DWO_NAME, and only THEN do we check
12625 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12626 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12628 static struct dwo_unit
*
12629 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
12630 const char *dwo_name
, const char *comp_dir
,
12631 ULONGEST signature
, int is_debug_types
)
12633 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
12634 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12635 const char *kind
= is_debug_types
? "TU" : "CU";
12636 void **dwo_file_slot
;
12637 struct dwo_file
*dwo_file
;
12638 struct dwp_file
*dwp_file
;
12640 /* First see if there's a DWP file.
12641 If we have a DWP file but didn't find the DWO inside it, don't
12642 look for the original DWO file. It makes gdb behave differently
12643 depending on whether one is debugging in the build tree. */
12645 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
12646 if (dwp_file
!= NULL
)
12648 const struct dwp_hash_table
*dwp_htab
=
12649 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12651 if (dwp_htab
!= NULL
)
12653 struct dwo_unit
*dwo_cutu
=
12654 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
12655 signature
, is_debug_types
);
12657 if (dwo_cutu
!= NULL
)
12659 if (dwarf_read_debug
)
12661 fprintf_unfiltered (gdb_stdlog
,
12662 "Virtual DWO %s %s found: @%s\n",
12663 kind
, hex_string (signature
),
12664 host_address_to_string (dwo_cutu
));
12672 /* No DWP file, look for the DWO file. */
12674 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12675 dwo_name
, comp_dir
);
12676 if (*dwo_file_slot
== NULL
)
12678 /* Read in the file and build a table of the CUs/TUs it contains. */
12679 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
12681 /* NOTE: This will be NULL if unable to open the file. */
12682 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12684 if (dwo_file
!= NULL
)
12686 struct dwo_unit
*dwo_cutu
= NULL
;
12688 if (is_debug_types
&& dwo_file
->tus
)
12690 struct dwo_unit find_dwo_cutu
;
12692 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12693 find_dwo_cutu
.signature
= signature
;
12695 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
12698 else if (!is_debug_types
&& dwo_file
->cus
)
12700 struct dwo_unit find_dwo_cutu
;
12702 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12703 find_dwo_cutu
.signature
= signature
;
12704 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
12708 if (dwo_cutu
!= NULL
)
12710 if (dwarf_read_debug
)
12712 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
12713 kind
, dwo_name
, hex_string (signature
),
12714 host_address_to_string (dwo_cutu
));
12721 /* We didn't find it. This could mean a dwo_id mismatch, or
12722 someone deleted the DWO/DWP file, or the search path isn't set up
12723 correctly to find the file. */
12725 if (dwarf_read_debug
)
12727 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
12728 kind
, dwo_name
, hex_string (signature
));
12731 /* This is a warning and not a complaint because it can be caused by
12732 pilot error (e.g., user accidentally deleting the DWO). */
12734 /* Print the name of the DWP file if we looked there, helps the user
12735 better diagnose the problem. */
12736 std::string dwp_text
;
12738 if (dwp_file
!= NULL
)
12739 dwp_text
= string_printf (" [in DWP file %s]",
12740 lbasename (dwp_file
->name
));
12742 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
12743 " [in module %s]"),
12744 kind
, dwo_name
, hex_string (signature
),
12746 this_unit
->is_debug_types
? "TU" : "CU",
12747 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
12752 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
12753 See lookup_dwo_cutu_unit for details. */
12755 static struct dwo_unit
*
12756 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
12757 const char *dwo_name
, const char *comp_dir
,
12758 ULONGEST signature
)
12760 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
12763 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
12764 See lookup_dwo_cutu_unit for details. */
12766 static struct dwo_unit
*
12767 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
12768 const char *dwo_name
, const char *comp_dir
)
12770 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
12773 /* Traversal function for queue_and_load_all_dwo_tus. */
12776 queue_and_load_dwo_tu (void **slot
, void *info
)
12778 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
12779 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
12780 ULONGEST signature
= dwo_unit
->signature
;
12781 struct signatured_type
*sig_type
=
12782 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
12784 if (sig_type
!= NULL
)
12786 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
12788 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
12789 a real dependency of PER_CU on SIG_TYPE. That is detected later
12790 while processing PER_CU. */
12791 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
12792 load_full_type_unit (sig_cu
);
12793 per_cu
->imported_symtabs_push (sig_cu
);
12799 /* Queue all TUs contained in the DWO of PER_CU to be read in.
12800 The DWO may have the only definition of the type, though it may not be
12801 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
12802 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
12805 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
12807 struct dwo_unit
*dwo_unit
;
12808 struct dwo_file
*dwo_file
;
12810 gdb_assert (!per_cu
->is_debug_types
);
12811 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
12812 gdb_assert (per_cu
->cu
!= NULL
);
12814 dwo_unit
= per_cu
->cu
->dwo_unit
;
12815 gdb_assert (dwo_unit
!= NULL
);
12817 dwo_file
= dwo_unit
->dwo_file
;
12818 if (dwo_file
->tus
!= NULL
)
12819 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
,
12823 /* Read in various DIEs. */
12825 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
12826 Inherit only the children of the DW_AT_abstract_origin DIE not being
12827 already referenced by DW_AT_abstract_origin from the children of the
12831 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
12833 struct die_info
*child_die
;
12834 sect_offset
*offsetp
;
12835 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
12836 struct die_info
*origin_die
;
12837 /* Iterator of the ORIGIN_DIE children. */
12838 struct die_info
*origin_child_die
;
12839 struct attribute
*attr
;
12840 struct dwarf2_cu
*origin_cu
;
12841 struct pending
**origin_previous_list_in_scope
;
12843 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12847 /* Note that following die references may follow to a die in a
12851 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
12853 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
12855 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
12856 origin_cu
->list_in_scope
= cu
->list_in_scope
;
12858 if (die
->tag
!= origin_die
->tag
12859 && !(die
->tag
== DW_TAG_inlined_subroutine
12860 && origin_die
->tag
== DW_TAG_subprogram
))
12861 complaint (_("DIE %s and its abstract origin %s have different tags"),
12862 sect_offset_str (die
->sect_off
),
12863 sect_offset_str (origin_die
->sect_off
));
12865 std::vector
<sect_offset
> offsets
;
12867 for (child_die
= die
->child
;
12868 child_die
&& child_die
->tag
;
12869 child_die
= child_die
->sibling
)
12871 struct die_info
*child_origin_die
;
12872 struct dwarf2_cu
*child_origin_cu
;
12874 /* We are trying to process concrete instance entries:
12875 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
12876 it's not relevant to our analysis here. i.e. detecting DIEs that are
12877 present in the abstract instance but not referenced in the concrete
12879 if (child_die
->tag
== DW_TAG_call_site
12880 || child_die
->tag
== DW_TAG_GNU_call_site
)
12883 /* For each CHILD_DIE, find the corresponding child of
12884 ORIGIN_DIE. If there is more than one layer of
12885 DW_AT_abstract_origin, follow them all; there shouldn't be,
12886 but GCC versions at least through 4.4 generate this (GCC PR
12888 child_origin_die
= child_die
;
12889 child_origin_cu
= cu
;
12892 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
12896 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
12900 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
12901 counterpart may exist. */
12902 if (child_origin_die
!= child_die
)
12904 if (child_die
->tag
!= child_origin_die
->tag
12905 && !(child_die
->tag
== DW_TAG_inlined_subroutine
12906 && child_origin_die
->tag
== DW_TAG_subprogram
))
12907 complaint (_("Child DIE %s and its abstract origin %s have "
12909 sect_offset_str (child_die
->sect_off
),
12910 sect_offset_str (child_origin_die
->sect_off
));
12911 if (child_origin_die
->parent
!= origin_die
)
12912 complaint (_("Child DIE %s and its abstract origin %s have "
12913 "different parents"),
12914 sect_offset_str (child_die
->sect_off
),
12915 sect_offset_str (child_origin_die
->sect_off
));
12917 offsets
.push_back (child_origin_die
->sect_off
);
12920 std::sort (offsets
.begin (), offsets
.end ());
12921 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
12922 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
12923 if (offsetp
[-1] == *offsetp
)
12924 complaint (_("Multiple children of DIE %s refer "
12925 "to DIE %s as their abstract origin"),
12926 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
12928 offsetp
= offsets
.data ();
12929 origin_child_die
= origin_die
->child
;
12930 while (origin_child_die
&& origin_child_die
->tag
)
12932 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
12933 while (offsetp
< offsets_end
12934 && *offsetp
< origin_child_die
->sect_off
)
12936 if (offsetp
>= offsets_end
12937 || *offsetp
> origin_child_die
->sect_off
)
12939 /* Found that ORIGIN_CHILD_DIE is really not referenced.
12940 Check whether we're already processing ORIGIN_CHILD_DIE.
12941 This can happen with mutually referenced abstract_origins.
12943 if (!origin_child_die
->in_process
)
12944 process_die (origin_child_die
, origin_cu
);
12946 origin_child_die
= origin_child_die
->sibling
;
12948 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
12950 if (cu
!= origin_cu
)
12951 compute_delayed_physnames (origin_cu
);
12955 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12957 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
12958 struct gdbarch
*gdbarch
= objfile
->arch ();
12959 struct context_stack
*newobj
;
12962 struct die_info
*child_die
;
12963 struct attribute
*attr
, *call_line
, *call_file
;
12965 CORE_ADDR baseaddr
;
12966 struct block
*block
;
12967 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
12968 std::vector
<struct symbol
*> template_args
;
12969 struct template_symbol
*templ_func
= NULL
;
12973 /* If we do not have call site information, we can't show the
12974 caller of this inlined function. That's too confusing, so
12975 only use the scope for local variables. */
12976 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
12977 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
12978 if (call_line
== NULL
|| call_file
== NULL
)
12980 read_lexical_block_scope (die
, cu
);
12985 baseaddr
= objfile
->text_section_offset ();
12987 name
= dwarf2_name (die
, cu
);
12989 /* Ignore functions with missing or empty names. These are actually
12990 illegal according to the DWARF standard. */
12993 complaint (_("missing name for subprogram DIE at %s"),
12994 sect_offset_str (die
->sect_off
));
12998 /* Ignore functions with missing or invalid low and high pc attributes. */
12999 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13000 <= PC_BOUNDS_INVALID
)
13002 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13003 if (!attr
|| !DW_UNSND (attr
))
13004 complaint (_("cannot get low and high bounds "
13005 "for subprogram DIE at %s"),
13006 sect_offset_str (die
->sect_off
));
13010 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13011 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13013 /* If we have any template arguments, then we must allocate a
13014 different sort of symbol. */
13015 for (child_die
= die
->child
; child_die
; child_die
= child_die
->sibling
)
13017 if (child_die
->tag
== DW_TAG_template_type_param
13018 || child_die
->tag
== DW_TAG_template_value_param
)
13020 templ_func
= new (&objfile
->objfile_obstack
) template_symbol
;
13021 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13026 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13027 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13028 (struct symbol
*) templ_func
);
13030 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13031 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
13034 /* If there is a location expression for DW_AT_frame_base, record
13036 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13037 if (attr
!= nullptr)
13038 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13040 /* If there is a location for the static link, record it. */
13041 newobj
->static_link
= NULL
;
13042 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13043 if (attr
!= nullptr)
13045 newobj
->static_link
13046 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13047 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13048 cu
->per_cu
->addr_type ());
13051 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13053 if (die
->child
!= NULL
)
13055 child_die
= die
->child
;
13056 while (child_die
&& child_die
->tag
)
13058 if (child_die
->tag
== DW_TAG_template_type_param
13059 || child_die
->tag
== DW_TAG_template_value_param
)
13061 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13064 template_args
.push_back (arg
);
13067 process_die (child_die
, cu
);
13068 child_die
= child_die
->sibling
;
13072 inherit_abstract_dies (die
, cu
);
13074 /* If we have a DW_AT_specification, we might need to import using
13075 directives from the context of the specification DIE. See the
13076 comment in determine_prefix. */
13077 if (cu
->language
== language_cplus
13078 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13080 struct dwarf2_cu
*spec_cu
= cu
;
13081 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13085 child_die
= spec_die
->child
;
13086 while (child_die
&& child_die
->tag
)
13088 if (child_die
->tag
== DW_TAG_imported_module
)
13089 process_die (child_die
, spec_cu
);
13090 child_die
= child_die
->sibling
;
13093 /* In some cases, GCC generates specification DIEs that
13094 themselves contain DW_AT_specification attributes. */
13095 spec_die
= die_specification (spec_die
, &spec_cu
);
13099 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13100 /* Make a block for the local symbols within. */
13101 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13102 cstk
.static_link
, lowpc
, highpc
);
13104 /* For C++, set the block's scope. */
13105 if ((cu
->language
== language_cplus
13106 || cu
->language
== language_fortran
13107 || cu
->language
== language_d
13108 || cu
->language
== language_rust
)
13109 && cu
->processing_has_namespace_info
)
13110 block_set_scope (block
, determine_prefix (die
, cu
),
13111 &objfile
->objfile_obstack
);
13113 /* If we have address ranges, record them. */
13114 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13116 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13118 /* Attach template arguments to function. */
13119 if (!template_args
.empty ())
13121 gdb_assert (templ_func
!= NULL
);
13123 templ_func
->n_template_arguments
= template_args
.size ();
13124 templ_func
->template_arguments
13125 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13126 templ_func
->n_template_arguments
);
13127 memcpy (templ_func
->template_arguments
,
13128 template_args
.data (),
13129 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13131 /* Make sure that the symtab is set on the new symbols. Even
13132 though they don't appear in this symtab directly, other parts
13133 of gdb assume that symbols do, and this is reasonably
13135 for (symbol
*sym
: template_args
)
13136 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13139 /* In C++, we can have functions nested inside functions (e.g., when
13140 a function declares a class that has methods). This means that
13141 when we finish processing a function scope, we may need to go
13142 back to building a containing block's symbol lists. */
13143 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13144 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13146 /* If we've finished processing a top-level function, subsequent
13147 symbols go in the file symbol list. */
13148 if (cu
->get_builder ()->outermost_context_p ())
13149 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13152 /* Process all the DIES contained within a lexical block scope. Start
13153 a new scope, process the dies, and then close the scope. */
13156 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13158 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13159 struct gdbarch
*gdbarch
= objfile
->arch ();
13160 CORE_ADDR lowpc
, highpc
;
13161 struct die_info
*child_die
;
13162 CORE_ADDR baseaddr
;
13164 baseaddr
= objfile
->text_section_offset ();
13166 /* Ignore blocks with missing or invalid low and high pc attributes. */
13167 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13168 as multiple lexical blocks? Handling children in a sane way would
13169 be nasty. Might be easier to properly extend generic blocks to
13170 describe ranges. */
13171 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13173 case PC_BOUNDS_NOT_PRESENT
:
13174 /* DW_TAG_lexical_block has no attributes, process its children as if
13175 there was no wrapping by that DW_TAG_lexical_block.
13176 GCC does no longer produces such DWARF since GCC r224161. */
13177 for (child_die
= die
->child
;
13178 child_die
!= NULL
&& child_die
->tag
;
13179 child_die
= child_die
->sibling
)
13181 /* We might already be processing this DIE. This can happen
13182 in an unusual circumstance -- where a subroutine A
13183 appears lexically in another subroutine B, but A actually
13184 inlines B. The recursion is broken here, rather than in
13185 inherit_abstract_dies, because it seems better to simply
13186 drop concrete children here. */
13187 if (!child_die
->in_process
)
13188 process_die (child_die
, cu
);
13191 case PC_BOUNDS_INVALID
:
13194 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13195 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13197 cu
->get_builder ()->push_context (0, lowpc
);
13198 if (die
->child
!= NULL
)
13200 child_die
= die
->child
;
13201 while (child_die
&& child_die
->tag
)
13203 process_die (child_die
, cu
);
13204 child_die
= child_die
->sibling
;
13207 inherit_abstract_dies (die
, cu
);
13208 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13210 if (*cu
->get_builder ()->get_local_symbols () != NULL
13211 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13213 struct block
*block
13214 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13215 cstk
.start_addr
, highpc
);
13217 /* Note that recording ranges after traversing children, as we
13218 do here, means that recording a parent's ranges entails
13219 walking across all its children's ranges as they appear in
13220 the address map, which is quadratic behavior.
13222 It would be nicer to record the parent's ranges before
13223 traversing its children, simply overriding whatever you find
13224 there. But since we don't even decide whether to create a
13225 block until after we've traversed its children, that's hard
13227 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13229 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13230 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13233 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13236 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13238 dwarf2_per_objfile
*per_objfile
= cu
->per_cu
->dwarf2_per_objfile
;
13239 struct objfile
*objfile
= per_objfile
->objfile
;
13240 struct gdbarch
*gdbarch
= objfile
->arch ();
13241 CORE_ADDR pc
, baseaddr
;
13242 struct attribute
*attr
;
13243 struct call_site
*call_site
, call_site_local
;
13246 struct die_info
*child_die
;
13248 baseaddr
= objfile
->text_section_offset ();
13250 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13253 /* This was a pre-DWARF-5 GNU extension alias
13254 for DW_AT_call_return_pc. */
13255 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13259 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13260 "DIE %s [in module %s]"),
13261 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13264 pc
= attr
->value_as_address () + baseaddr
;
13265 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13267 if (cu
->call_site_htab
== NULL
)
13268 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13269 NULL
, &objfile
->objfile_obstack
,
13270 hashtab_obstack_allocate
, NULL
);
13271 call_site_local
.pc
= pc
;
13272 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13275 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13276 "DIE %s [in module %s]"),
13277 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13278 objfile_name (objfile
));
13282 /* Count parameters at the caller. */
13285 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13286 child_die
= child_die
->sibling
)
13288 if (child_die
->tag
!= DW_TAG_call_site_parameter
13289 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13291 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13292 "DW_TAG_call_site child DIE %s [in module %s]"),
13293 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13294 objfile_name (objfile
));
13302 = ((struct call_site
*)
13303 obstack_alloc (&objfile
->objfile_obstack
,
13304 sizeof (*call_site
)
13305 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13307 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13308 call_site
->pc
= pc
;
13310 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13311 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13313 struct die_info
*func_die
;
13315 /* Skip also over DW_TAG_inlined_subroutine. */
13316 for (func_die
= die
->parent
;
13317 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13318 && func_die
->tag
!= DW_TAG_subroutine_type
;
13319 func_die
= func_die
->parent
);
13321 /* DW_AT_call_all_calls is a superset
13322 of DW_AT_call_all_tail_calls. */
13324 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13325 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13326 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13327 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13329 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13330 not complete. But keep CALL_SITE for look ups via call_site_htab,
13331 both the initial caller containing the real return address PC and
13332 the final callee containing the current PC of a chain of tail
13333 calls do not need to have the tail call list complete. But any
13334 function candidate for a virtual tail call frame searched via
13335 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13336 determined unambiguously. */
13340 struct type
*func_type
= NULL
;
13343 func_type
= get_die_type (func_die
, cu
);
13344 if (func_type
!= NULL
)
13346 gdb_assert (func_type
->code () == TYPE_CODE_FUNC
);
13348 /* Enlist this call site to the function. */
13349 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13350 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13353 complaint (_("Cannot find function owning DW_TAG_call_site "
13354 "DIE %s [in module %s]"),
13355 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13359 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13361 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13363 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13366 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13367 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13369 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13370 if (!attr
|| (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0))
13371 /* Keep NULL DWARF_BLOCK. */;
13372 else if (attr
->form_is_block ())
13374 struct dwarf2_locexpr_baton
*dlbaton
;
13376 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13377 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13378 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13379 dlbaton
->per_objfile
= per_objfile
;
13380 dlbaton
->per_cu
= cu
->per_cu
;
13382 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13384 else if (attr
->form_is_ref ())
13386 struct dwarf2_cu
*target_cu
= cu
;
13387 struct die_info
*target_die
;
13389 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13390 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13391 if (die_is_declaration (target_die
, target_cu
))
13393 const char *target_physname
;
13395 /* Prefer the mangled name; otherwise compute the demangled one. */
13396 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13397 if (target_physname
== NULL
)
13398 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13399 if (target_physname
== NULL
)
13400 complaint (_("DW_AT_call_target target DIE has invalid "
13401 "physname, for referencing DIE %s [in module %s]"),
13402 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13404 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13410 /* DW_AT_entry_pc should be preferred. */
13411 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13412 <= PC_BOUNDS_INVALID
)
13413 complaint (_("DW_AT_call_target target DIE has invalid "
13414 "low pc, for referencing DIE %s [in module %s]"),
13415 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13418 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13419 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
13424 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
13425 "block nor reference, for DIE %s [in module %s]"),
13426 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13428 call_site
->per_cu
= cu
->per_cu
;
13430 for (child_die
= die
->child
;
13431 child_die
&& child_die
->tag
;
13432 child_die
= child_die
->sibling
)
13434 struct call_site_parameter
*parameter
;
13435 struct attribute
*loc
, *origin
;
13437 if (child_die
->tag
!= DW_TAG_call_site_parameter
13438 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13440 /* Already printed the complaint above. */
13444 gdb_assert (call_site
->parameter_count
< nparams
);
13445 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
13447 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
13448 specifies DW_TAG_formal_parameter. Value of the data assumed for the
13449 register is contained in DW_AT_call_value. */
13451 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
13452 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
13453 if (origin
== NULL
)
13455 /* This was a pre-DWARF-5 GNU extension alias
13456 for DW_AT_call_parameter. */
13457 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
13459 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
13461 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
13463 sect_offset sect_off
= origin
->get_ref_die_offset ();
13464 if (!cu
->header
.offset_in_cu_p (sect_off
))
13466 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
13467 binding can be done only inside one CU. Such referenced DIE
13468 therefore cannot be even moved to DW_TAG_partial_unit. */
13469 complaint (_("DW_AT_call_parameter offset is not in CU for "
13470 "DW_TAG_call_site child DIE %s [in module %s]"),
13471 sect_offset_str (child_die
->sect_off
),
13472 objfile_name (objfile
));
13475 parameter
->u
.param_cu_off
13476 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
13478 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
13480 complaint (_("No DW_FORM_block* DW_AT_location for "
13481 "DW_TAG_call_site child DIE %s [in module %s]"),
13482 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
13487 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
13488 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
13489 if (parameter
->u
.dwarf_reg
!= -1)
13490 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
13491 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
13492 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
13493 ¶meter
->u
.fb_offset
))
13494 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
13497 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
13498 "for DW_FORM_block* DW_AT_location is supported for "
13499 "DW_TAG_call_site child DIE %s "
13501 sect_offset_str (child_die
->sect_off
),
13502 objfile_name (objfile
));
13507 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
13509 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
13510 if (attr
== NULL
|| !attr
->form_is_block ())
13512 complaint (_("No DW_FORM_block* DW_AT_call_value for "
13513 "DW_TAG_call_site child DIE %s [in module %s]"),
13514 sect_offset_str (child_die
->sect_off
),
13515 objfile_name (objfile
));
13518 parameter
->value
= DW_BLOCK (attr
)->data
;
13519 parameter
->value_size
= DW_BLOCK (attr
)->size
;
13521 /* Parameters are not pre-cleared by memset above. */
13522 parameter
->data_value
= NULL
;
13523 parameter
->data_value_size
= 0;
13524 call_site
->parameter_count
++;
13526 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
13528 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
13529 if (attr
!= nullptr)
13531 if (!attr
->form_is_block ())
13532 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
13533 "DW_TAG_call_site child DIE %s [in module %s]"),
13534 sect_offset_str (child_die
->sect_off
),
13535 objfile_name (objfile
));
13538 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13539 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13545 /* Helper function for read_variable. If DIE represents a virtual
13546 table, then return the type of the concrete object that is
13547 associated with the virtual table. Otherwise, return NULL. */
13549 static struct type
*
13550 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13552 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13556 /* Find the type DIE. */
13557 struct die_info
*type_die
= NULL
;
13558 struct dwarf2_cu
*type_cu
= cu
;
13560 if (attr
->form_is_ref ())
13561 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13562 if (type_die
== NULL
)
13565 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13567 return die_containing_type (type_die
, type_cu
);
13570 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13573 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13575 struct rust_vtable_symbol
*storage
= NULL
;
13577 if (cu
->language
== language_rust
)
13579 struct type
*containing_type
= rust_containing_type (die
, cu
);
13581 if (containing_type
!= NULL
)
13583 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13585 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol
;
13586 storage
->concrete_type
= containing_type
;
13587 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13591 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
13592 struct attribute
*abstract_origin
13593 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13594 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
13595 if (res
== NULL
&& loc
&& abstract_origin
)
13597 /* We have a variable without a name, but with a location and an abstract
13598 origin. This may be a concrete instance of an abstract variable
13599 referenced from an DW_OP_GNU_variable_value, so save it to find it back
13601 struct dwarf2_cu
*origin_cu
= cu
;
13602 struct die_info
*origin_die
13603 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
13604 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
13605 dpo
->per_bfd
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
13609 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13610 reading .debug_rnglists.
13611 Callback's type should be:
13612 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13613 Return true if the attributes are present and valid, otherwise,
13616 template <typename Callback
>
13618 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13619 Callback
&&callback
)
13621 struct dwarf2_per_objfile
*dwarf2_per_objfile
13622 = cu
->per_cu
->dwarf2_per_objfile
;
13623 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13624 bfd
*obfd
= objfile
->obfd
;
13625 /* Base address selection entry. */
13626 gdb::optional
<CORE_ADDR
> base
;
13627 const gdb_byte
*buffer
;
13628 CORE_ADDR baseaddr
;
13629 bool overflow
= false;
13631 base
= cu
->base_address
;
13633 dwarf2_per_objfile
->per_bfd
->rnglists
.read (objfile
);
13634 if (offset
>= dwarf2_per_objfile
->per_bfd
->rnglists
.size
)
13636 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13640 buffer
= dwarf2_per_objfile
->per_bfd
->rnglists
.buffer
+ offset
;
13642 baseaddr
= objfile
->text_section_offset ();
13646 /* Initialize it due to a false compiler warning. */
13647 CORE_ADDR range_beginning
= 0, range_end
= 0;
13648 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->per_bfd
->rnglists
.buffer
13649 + dwarf2_per_objfile
->per_bfd
->rnglists
.size
);
13650 unsigned int bytes_read
;
13652 if (buffer
== buf_end
)
13657 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13660 case DW_RLE_end_of_list
:
13662 case DW_RLE_base_address
:
13663 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13668 base
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13669 buffer
+= bytes_read
;
13671 case DW_RLE_start_length
:
13672 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13677 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13679 buffer
+= bytes_read
;
13680 range_end
= (range_beginning
13681 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13682 buffer
+= bytes_read
;
13683 if (buffer
> buf_end
)
13689 case DW_RLE_offset_pair
:
13690 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13691 buffer
+= bytes_read
;
13692 if (buffer
> buf_end
)
13697 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13698 buffer
+= bytes_read
;
13699 if (buffer
> buf_end
)
13705 case DW_RLE_start_end
:
13706 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13711 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13713 buffer
+= bytes_read
;
13714 range_end
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13715 buffer
+= bytes_read
;
13718 complaint (_("Invalid .debug_rnglists data (no base address)"));
13721 if (rlet
== DW_RLE_end_of_list
|| overflow
)
13723 if (rlet
== DW_RLE_base_address
)
13726 if (!base
.has_value ())
13728 /* We have no valid base address for the ranges
13730 complaint (_("Invalid .debug_rnglists data (no base address)"));
13734 if (range_beginning
> range_end
)
13736 /* Inverted range entries are invalid. */
13737 complaint (_("Invalid .debug_rnglists data (inverted range)"));
13741 /* Empty range entries have no effect. */
13742 if (range_beginning
== range_end
)
13745 range_beginning
+= *base
;
13746 range_end
+= *base
;
13748 /* A not-uncommon case of bad debug info.
13749 Don't pollute the addrmap with bad data. */
13750 if (range_beginning
+ baseaddr
== 0
13751 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
13753 complaint (_(".debug_rnglists entry has start address of zero"
13754 " [in module %s]"), objfile_name (objfile
));
13758 callback (range_beginning
, range_end
);
13763 complaint (_("Offset %d is not terminated "
13764 "for DW_AT_ranges attribute"),
13772 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
13773 Callback's type should be:
13774 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13775 Return 1 if the attributes are present and valid, otherwise, return 0. */
13777 template <typename Callback
>
13779 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
13780 Callback
&&callback
)
13782 struct dwarf2_per_objfile
*dwarf2_per_objfile
13783 = cu
->per_cu
->dwarf2_per_objfile
;
13784 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13785 struct comp_unit_head
*cu_header
= &cu
->header
;
13786 bfd
*obfd
= objfile
->obfd
;
13787 unsigned int addr_size
= cu_header
->addr_size
;
13788 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13789 /* Base address selection entry. */
13790 gdb::optional
<CORE_ADDR
> base
;
13791 unsigned int dummy
;
13792 const gdb_byte
*buffer
;
13793 CORE_ADDR baseaddr
;
13795 if (cu_header
->version
>= 5)
13796 return dwarf2_rnglists_process (offset
, cu
, callback
);
13798 base
= cu
->base_address
;
13800 dwarf2_per_objfile
->per_bfd
->ranges
.read (objfile
);
13801 if (offset
>= dwarf2_per_objfile
->per_bfd
->ranges
.size
)
13803 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13807 buffer
= dwarf2_per_objfile
->per_bfd
->ranges
.buffer
+ offset
;
13809 baseaddr
= objfile
->text_section_offset ();
13813 CORE_ADDR range_beginning
, range_end
;
13815 range_beginning
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13816 buffer
+= addr_size
;
13817 range_end
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13818 buffer
+= addr_size
;
13819 offset
+= 2 * addr_size
;
13821 /* An end of list marker is a pair of zero addresses. */
13822 if (range_beginning
== 0 && range_end
== 0)
13823 /* Found the end of list entry. */
13826 /* Each base address selection entry is a pair of 2 values.
13827 The first is the largest possible address, the second is
13828 the base address. Check for a base address here. */
13829 if ((range_beginning
& mask
) == mask
)
13831 /* If we found the largest possible address, then we already
13832 have the base address in range_end. */
13837 if (!base
.has_value ())
13839 /* We have no valid base address for the ranges
13841 complaint (_("Invalid .debug_ranges data (no base address)"));
13845 if (range_beginning
> range_end
)
13847 /* Inverted range entries are invalid. */
13848 complaint (_("Invalid .debug_ranges data (inverted range)"));
13852 /* Empty range entries have no effect. */
13853 if (range_beginning
== range_end
)
13856 range_beginning
+= *base
;
13857 range_end
+= *base
;
13859 /* A not-uncommon case of bad debug info.
13860 Don't pollute the addrmap with bad data. */
13861 if (range_beginning
+ baseaddr
== 0
13862 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
13864 complaint (_(".debug_ranges entry has start address of zero"
13865 " [in module %s]"), objfile_name (objfile
));
13869 callback (range_beginning
, range_end
);
13875 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
13876 Return 1 if the attributes are present and valid, otherwise, return 0.
13877 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
13880 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
13881 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
13882 dwarf2_psymtab
*ranges_pst
)
13884 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13885 struct gdbarch
*gdbarch
= objfile
->arch ();
13886 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
13889 CORE_ADDR high
= 0;
13892 retval
= dwarf2_ranges_process (offset
, cu
,
13893 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
13895 if (ranges_pst
!= NULL
)
13900 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13901 range_beginning
+ baseaddr
)
13903 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13904 range_end
+ baseaddr
)
13906 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
13907 lowpc
, highpc
- 1, ranges_pst
);
13910 /* FIXME: This is recording everything as a low-high
13911 segment of consecutive addresses. We should have a
13912 data structure for discontiguous block ranges
13916 low
= range_beginning
;
13922 if (range_beginning
< low
)
13923 low
= range_beginning
;
13924 if (range_end
> high
)
13932 /* If the first entry is an end-of-list marker, the range
13933 describes an empty scope, i.e. no instructions. */
13939 *high_return
= high
;
13943 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
13944 definition for the return value. *LOWPC and *HIGHPC are set iff
13945 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
13947 static enum pc_bounds_kind
13948 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
13949 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
13950 dwarf2_psymtab
*pst
)
13952 struct dwarf2_per_objfile
*dwarf2_per_objfile
13953 = cu
->per_cu
->dwarf2_per_objfile
;
13954 struct attribute
*attr
;
13955 struct attribute
*attr_high
;
13957 CORE_ADDR high
= 0;
13958 enum pc_bounds_kind ret
;
13960 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
13963 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13964 if (attr
!= nullptr)
13966 low
= attr
->value_as_address ();
13967 high
= attr_high
->value_as_address ();
13968 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
13972 /* Found high w/o low attribute. */
13973 return PC_BOUNDS_INVALID
;
13975 /* Found consecutive range of addresses. */
13976 ret
= PC_BOUNDS_HIGH_LOW
;
13980 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
13983 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
13984 We take advantage of the fact that DW_AT_ranges does not appear
13985 in DW_TAG_compile_unit of DWO files. */
13986 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
13987 unsigned int ranges_offset
= (DW_UNSND (attr
)
13988 + (need_ranges_base
13992 /* Value of the DW_AT_ranges attribute is the offset in the
13993 .debug_ranges section. */
13994 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
13995 return PC_BOUNDS_INVALID
;
13996 /* Found discontinuous range of addresses. */
13997 ret
= PC_BOUNDS_RANGES
;
14000 return PC_BOUNDS_NOT_PRESENT
;
14003 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14005 return PC_BOUNDS_INVALID
;
14007 /* When using the GNU linker, .gnu.linkonce. sections are used to
14008 eliminate duplicate copies of functions and vtables and such.
14009 The linker will arbitrarily choose one and discard the others.
14010 The AT_*_pc values for such functions refer to local labels in
14011 these sections. If the section from that file was discarded, the
14012 labels are not in the output, so the relocs get a value of 0.
14013 If this is a discarded function, mark the pc bounds as invalid,
14014 so that GDB will ignore it. */
14015 if (low
== 0 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
14016 return PC_BOUNDS_INVALID
;
14024 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14025 its low and high PC addresses. Do nothing if these addresses could not
14026 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14027 and HIGHPC to the high address if greater than HIGHPC. */
14030 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14031 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14032 struct dwarf2_cu
*cu
)
14034 CORE_ADDR low
, high
;
14035 struct die_info
*child
= die
->child
;
14037 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14039 *lowpc
= std::min (*lowpc
, low
);
14040 *highpc
= std::max (*highpc
, high
);
14043 /* If the language does not allow nested subprograms (either inside
14044 subprograms or lexical blocks), we're done. */
14045 if (cu
->language
!= language_ada
)
14048 /* Check all the children of the given DIE. If it contains nested
14049 subprograms, then check their pc bounds. Likewise, we need to
14050 check lexical blocks as well, as they may also contain subprogram
14052 while (child
&& child
->tag
)
14054 if (child
->tag
== DW_TAG_subprogram
14055 || child
->tag
== DW_TAG_lexical_block
)
14056 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14057 child
= child
->sibling
;
14061 /* Get the low and high pc's represented by the scope DIE, and store
14062 them in *LOWPC and *HIGHPC. If the correct values can't be
14063 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14066 get_scope_pc_bounds (struct die_info
*die
,
14067 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14068 struct dwarf2_cu
*cu
)
14070 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14071 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14072 CORE_ADDR current_low
, current_high
;
14074 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14075 >= PC_BOUNDS_RANGES
)
14077 best_low
= current_low
;
14078 best_high
= current_high
;
14082 struct die_info
*child
= die
->child
;
14084 while (child
&& child
->tag
)
14086 switch (child
->tag
) {
14087 case DW_TAG_subprogram
:
14088 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14090 case DW_TAG_namespace
:
14091 case DW_TAG_module
:
14092 /* FIXME: carlton/2004-01-16: Should we do this for
14093 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14094 that current GCC's always emit the DIEs corresponding
14095 to definitions of methods of classes as children of a
14096 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14097 the DIEs giving the declarations, which could be
14098 anywhere). But I don't see any reason why the
14099 standards says that they have to be there. */
14100 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14102 if (current_low
!= ((CORE_ADDR
) -1))
14104 best_low
= std::min (best_low
, current_low
);
14105 best_high
= std::max (best_high
, current_high
);
14113 child
= child
->sibling
;
14118 *highpc
= best_high
;
14121 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14125 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14126 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14128 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14129 struct gdbarch
*gdbarch
= objfile
->arch ();
14130 struct attribute
*attr
;
14131 struct attribute
*attr_high
;
14133 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14136 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14137 if (attr
!= nullptr)
14139 CORE_ADDR low
= attr
->value_as_address ();
14140 CORE_ADDR high
= attr_high
->value_as_address ();
14142 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14145 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14146 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14147 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14151 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14152 if (attr
!= nullptr)
14154 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14155 We take advantage of the fact that DW_AT_ranges does not appear
14156 in DW_TAG_compile_unit of DWO files. */
14157 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14159 /* The value of the DW_AT_ranges attribute is the offset of the
14160 address range list in the .debug_ranges section. */
14161 unsigned long offset
= (DW_UNSND (attr
)
14162 + (need_ranges_base
? cu
->ranges_base
: 0));
14164 std::vector
<blockrange
> blockvec
;
14165 dwarf2_ranges_process (offset
, cu
,
14166 [&] (CORE_ADDR start
, CORE_ADDR end
)
14170 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14171 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14172 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14173 blockvec
.emplace_back (start
, end
);
14176 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14180 /* Check whether the producer field indicates either of GCC < 4.6, or the
14181 Intel C/C++ compiler, and cache the result in CU. */
14184 check_producer (struct dwarf2_cu
*cu
)
14188 if (cu
->producer
== NULL
)
14190 /* For unknown compilers expect their behavior is DWARF version
14193 GCC started to support .debug_types sections by -gdwarf-4 since
14194 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14195 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14196 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14197 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14199 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14201 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14202 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14204 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14206 cu
->producer_is_icc
= true;
14207 cu
->producer_is_icc_lt_14
= major
< 14;
14209 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14210 cu
->producer_is_codewarrior
= true;
14213 /* For other non-GCC compilers, expect their behavior is DWARF version
14217 cu
->checked_producer
= true;
14220 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14221 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14222 during 4.6.0 experimental. */
14225 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14227 if (!cu
->checked_producer
)
14228 check_producer (cu
);
14230 return cu
->producer_is_gxx_lt_4_6
;
14234 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14235 with incorrect is_stmt attributes. */
14238 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14240 if (!cu
->checked_producer
)
14241 check_producer (cu
);
14243 return cu
->producer_is_codewarrior
;
14246 /* Return the default accessibility type if it is not overridden by
14247 DW_AT_accessibility. */
14249 static enum dwarf_access_attribute
14250 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14252 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14254 /* The default DWARF 2 accessibility for members is public, the default
14255 accessibility for inheritance is private. */
14257 if (die
->tag
!= DW_TAG_inheritance
)
14258 return DW_ACCESS_public
;
14260 return DW_ACCESS_private
;
14264 /* DWARF 3+ defines the default accessibility a different way. The same
14265 rules apply now for DW_TAG_inheritance as for the members and it only
14266 depends on the container kind. */
14268 if (die
->parent
->tag
== DW_TAG_class_type
)
14269 return DW_ACCESS_private
;
14271 return DW_ACCESS_public
;
14275 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14276 offset. If the attribute was not found return 0, otherwise return
14277 1. If it was found but could not properly be handled, set *OFFSET
14281 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14284 struct attribute
*attr
;
14286 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14291 /* Note that we do not check for a section offset first here.
14292 This is because DW_AT_data_member_location is new in DWARF 4,
14293 so if we see it, we can assume that a constant form is really
14294 a constant and not a section offset. */
14295 if (attr
->form_is_constant ())
14296 *offset
= attr
->constant_value (0);
14297 else if (attr
->form_is_section_offset ())
14298 dwarf2_complex_location_expr_complaint ();
14299 else if (attr
->form_is_block ())
14300 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14302 dwarf2_complex_location_expr_complaint ();
14310 /* Look for DW_AT_data_member_location and store the results in FIELD. */
14313 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14314 struct field
*field
)
14316 struct attribute
*attr
;
14318 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14321 if (attr
->form_is_constant ())
14323 LONGEST offset
= attr
->constant_value (0);
14324 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14326 else if (attr
->form_is_section_offset ())
14327 dwarf2_complex_location_expr_complaint ();
14328 else if (attr
->form_is_block ())
14331 CORE_ADDR offset
= decode_locdesc (DW_BLOCK (attr
), cu
, &handled
);
14333 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14336 struct objfile
*objfile
14337 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14338 struct dwarf2_locexpr_baton
*dlbaton
14339 = XOBNEW (&objfile
->objfile_obstack
,
14340 struct dwarf2_locexpr_baton
);
14341 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14342 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14343 /* When using this baton, we want to compute the address
14344 of the field, not the value. This is why
14345 is_reference is set to false here. */
14346 dlbaton
->is_reference
= false;
14347 dlbaton
->per_objfile
= cu
->per_cu
->dwarf2_per_objfile
;
14348 dlbaton
->per_cu
= cu
->per_cu
;
14350 SET_FIELD_DWARF_BLOCK (*field
, dlbaton
);
14354 dwarf2_complex_location_expr_complaint ();
14358 /* Add an aggregate field to the field list. */
14361 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14362 struct dwarf2_cu
*cu
)
14364 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14365 struct gdbarch
*gdbarch
= objfile
->arch ();
14366 struct nextfield
*new_field
;
14367 struct attribute
*attr
;
14369 const char *fieldname
= "";
14371 if (die
->tag
== DW_TAG_inheritance
)
14373 fip
->baseclasses
.emplace_back ();
14374 new_field
= &fip
->baseclasses
.back ();
14378 fip
->fields
.emplace_back ();
14379 new_field
= &fip
->fields
.back ();
14382 new_field
->offset
= die
->sect_off
;
14384 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14385 if (attr
!= nullptr)
14386 new_field
->accessibility
= DW_UNSND (attr
);
14388 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14389 if (new_field
->accessibility
!= DW_ACCESS_public
)
14390 fip
->non_public_fields
= 1;
14392 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14393 if (attr
!= nullptr)
14394 new_field
->virtuality
= DW_UNSND (attr
);
14396 new_field
->virtuality
= DW_VIRTUALITY_none
;
14398 fp
= &new_field
->field
;
14400 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14402 /* Data member other than a C++ static data member. */
14404 /* Get type of field. */
14405 fp
->type
= die_type (die
, cu
);
14407 SET_FIELD_BITPOS (*fp
, 0);
14409 /* Get bit size of field (zero if none). */
14410 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14411 if (attr
!= nullptr)
14413 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14417 FIELD_BITSIZE (*fp
) = 0;
14420 /* Get bit offset of field. */
14421 handle_data_member_location (die
, cu
, fp
);
14422 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14423 if (attr
!= nullptr)
14425 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
14427 /* For big endian bits, the DW_AT_bit_offset gives the
14428 additional bit offset from the MSB of the containing
14429 anonymous object to the MSB of the field. We don't
14430 have to do anything special since we don't need to
14431 know the size of the anonymous object. */
14432 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14436 /* For little endian bits, compute the bit offset to the
14437 MSB of the anonymous object, subtract off the number of
14438 bits from the MSB of the field to the MSB of the
14439 object, and then subtract off the number of bits of
14440 the field itself. The result is the bit offset of
14441 the LSB of the field. */
14442 int anonymous_size
;
14443 int bit_offset
= DW_UNSND (attr
);
14445 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14446 if (attr
!= nullptr)
14448 /* The size of the anonymous object containing
14449 the bit field is explicit, so use the
14450 indicated size (in bytes). */
14451 anonymous_size
= DW_UNSND (attr
);
14455 /* The size of the anonymous object containing
14456 the bit field must be inferred from the type
14457 attribute of the data member containing the
14459 anonymous_size
= TYPE_LENGTH (fp
->type
);
14461 SET_FIELD_BITPOS (*fp
,
14462 (FIELD_BITPOS (*fp
)
14463 + anonymous_size
* bits_per_byte
14464 - bit_offset
- FIELD_BITSIZE (*fp
)));
14467 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14469 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14470 + attr
->constant_value (0)));
14472 /* Get name of field. */
14473 fieldname
= dwarf2_name (die
, cu
);
14474 if (fieldname
== NULL
)
14477 /* The name is already allocated along with this objfile, so we don't
14478 need to duplicate it for the type. */
14479 fp
->name
= fieldname
;
14481 /* Change accessibility for artificial fields (e.g. virtual table
14482 pointer or virtual base class pointer) to private. */
14483 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14485 FIELD_ARTIFICIAL (*fp
) = 1;
14486 new_field
->accessibility
= DW_ACCESS_private
;
14487 fip
->non_public_fields
= 1;
14490 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14492 /* C++ static member. */
14494 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14495 is a declaration, but all versions of G++ as of this writing
14496 (so through at least 3.2.1) incorrectly generate
14497 DW_TAG_variable tags. */
14499 const char *physname
;
14501 /* Get name of field. */
14502 fieldname
= dwarf2_name (die
, cu
);
14503 if (fieldname
== NULL
)
14506 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14508 /* Only create a symbol if this is an external value.
14509 new_symbol checks this and puts the value in the global symbol
14510 table, which we want. If it is not external, new_symbol
14511 will try to put the value in cu->list_in_scope which is wrong. */
14512 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
14514 /* A static const member, not much different than an enum as far as
14515 we're concerned, except that we can support more types. */
14516 new_symbol (die
, NULL
, cu
);
14519 /* Get physical name. */
14520 physname
= dwarf2_physname (fieldname
, die
, cu
);
14522 /* The name is already allocated along with this objfile, so we don't
14523 need to duplicate it for the type. */
14524 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
14525 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14526 FIELD_NAME (*fp
) = fieldname
;
14528 else if (die
->tag
== DW_TAG_inheritance
)
14530 /* C++ base class field. */
14531 handle_data_member_location (die
, cu
, fp
);
14532 FIELD_BITSIZE (*fp
) = 0;
14533 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14534 FIELD_NAME (*fp
) = fp
->type
->name ();
14537 gdb_assert_not_reached ("missing case in dwarf2_add_field");
14540 /* Can the type given by DIE define another type? */
14543 type_can_define_types (const struct die_info
*die
)
14547 case DW_TAG_typedef
:
14548 case DW_TAG_class_type
:
14549 case DW_TAG_structure_type
:
14550 case DW_TAG_union_type
:
14551 case DW_TAG_enumeration_type
:
14559 /* Add a type definition defined in the scope of the FIP's class. */
14562 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
14563 struct dwarf2_cu
*cu
)
14565 struct decl_field fp
;
14566 memset (&fp
, 0, sizeof (fp
));
14568 gdb_assert (type_can_define_types (die
));
14570 /* Get name of field. NULL is okay here, meaning an anonymous type. */
14571 fp
.name
= dwarf2_name (die
, cu
);
14572 fp
.type
= read_type_die (die
, cu
);
14574 /* Save accessibility. */
14575 enum dwarf_access_attribute accessibility
;
14576 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14578 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14580 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14581 switch (accessibility
)
14583 case DW_ACCESS_public
:
14584 /* The assumed value if neither private nor protected. */
14586 case DW_ACCESS_private
:
14589 case DW_ACCESS_protected
:
14590 fp
.is_protected
= 1;
14593 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14596 if (die
->tag
== DW_TAG_typedef
)
14597 fip
->typedef_field_list
.push_back (fp
);
14599 fip
->nested_types_list
.push_back (fp
);
14602 /* A convenience typedef that's used when finding the discriminant
14603 field for a variant part. */
14604 typedef std::unordered_map
<sect_offset
, int, gdb::hash_enum
<sect_offset
>>
14607 /* Compute the discriminant range for a given variant. OBSTACK is
14608 where the results will be stored. VARIANT is the variant to
14609 process. IS_UNSIGNED indicates whether the discriminant is signed
14612 static const gdb::array_view
<discriminant_range
>
14613 convert_variant_range (struct obstack
*obstack
, const variant_field
&variant
,
14616 std::vector
<discriminant_range
> ranges
;
14618 if (variant
.default_branch
)
14621 if (variant
.discr_list_data
== nullptr)
14623 discriminant_range r
14624 = {variant
.discriminant_value
, variant
.discriminant_value
};
14625 ranges
.push_back (r
);
14629 gdb::array_view
<const gdb_byte
> data (variant
.discr_list_data
->data
,
14630 variant
.discr_list_data
->size
);
14631 while (!data
.empty ())
14633 if (data
[0] != DW_DSC_range
&& data
[0] != DW_DSC_label
)
14635 complaint (_("invalid discriminant marker: %d"), data
[0]);
14638 bool is_range
= data
[0] == DW_DSC_range
;
14639 data
= data
.slice (1);
14641 ULONGEST low
, high
;
14642 unsigned int bytes_read
;
14646 complaint (_("DW_AT_discr_list missing low value"));
14650 low
= read_unsigned_leb128 (nullptr, data
.data (), &bytes_read
);
14652 low
= (ULONGEST
) read_signed_leb128 (nullptr, data
.data (),
14654 data
= data
.slice (bytes_read
);
14660 complaint (_("DW_AT_discr_list missing high value"));
14664 high
= read_unsigned_leb128 (nullptr, data
.data (),
14667 high
= (LONGEST
) read_signed_leb128 (nullptr, data
.data (),
14669 data
= data
.slice (bytes_read
);
14674 ranges
.push_back ({ low
, high
});
14678 discriminant_range
*result
= XOBNEWVEC (obstack
, discriminant_range
,
14680 std::copy (ranges
.begin (), ranges
.end (), result
);
14681 return gdb::array_view
<discriminant_range
> (result
, ranges
.size ());
14684 static const gdb::array_view
<variant_part
> create_variant_parts
14685 (struct obstack
*obstack
,
14686 const offset_map_type
&offset_map
,
14687 struct field_info
*fi
,
14688 const std::vector
<variant_part_builder
> &variant_parts
);
14690 /* Fill in a "struct variant" for a given variant field. RESULT is
14691 the variant to fill in. OBSTACK is where any needed allocations
14692 will be done. OFFSET_MAP holds the mapping from section offsets to
14693 fields for the type. FI describes the fields of the type we're
14694 processing. FIELD is the variant field we're converting. */
14697 create_one_variant (variant
&result
, struct obstack
*obstack
,
14698 const offset_map_type
&offset_map
,
14699 struct field_info
*fi
, const variant_field
&field
)
14701 result
.discriminants
= convert_variant_range (obstack
, field
, false);
14702 result
.first_field
= field
.first_field
+ fi
->baseclasses
.size ();
14703 result
.last_field
= field
.last_field
+ fi
->baseclasses
.size ();
14704 result
.parts
= create_variant_parts (obstack
, offset_map
, fi
,
14705 field
.variant_parts
);
14708 /* Fill in a "struct variant_part" for a given variant part. RESULT
14709 is the variant part to fill in. OBSTACK is where any needed
14710 allocations will be done. OFFSET_MAP holds the mapping from
14711 section offsets to fields for the type. FI describes the fields of
14712 the type we're processing. BUILDER is the variant part to be
14716 create_one_variant_part (variant_part
&result
,
14717 struct obstack
*obstack
,
14718 const offset_map_type
&offset_map
,
14719 struct field_info
*fi
,
14720 const variant_part_builder
&builder
)
14722 auto iter
= offset_map
.find (builder
.discriminant_offset
);
14723 if (iter
== offset_map
.end ())
14725 result
.discriminant_index
= -1;
14726 /* Doesn't matter. */
14727 result
.is_unsigned
= false;
14731 result
.discriminant_index
= iter
->second
;
14733 = TYPE_UNSIGNED (FIELD_TYPE
14734 (fi
->fields
[result
.discriminant_index
].field
));
14737 size_t n
= builder
.variants
.size ();
14738 variant
*output
= new (obstack
) variant
[n
];
14739 for (size_t i
= 0; i
< n
; ++i
)
14740 create_one_variant (output
[i
], obstack
, offset_map
, fi
,
14741 builder
.variants
[i
]);
14743 result
.variants
= gdb::array_view
<variant
> (output
, n
);
14746 /* Create a vector of variant parts that can be attached to a type.
14747 OBSTACK is where any needed allocations will be done. OFFSET_MAP
14748 holds the mapping from section offsets to fields for the type. FI
14749 describes the fields of the type we're processing. VARIANT_PARTS
14750 is the vector to convert. */
14752 static const gdb::array_view
<variant_part
>
14753 create_variant_parts (struct obstack
*obstack
,
14754 const offset_map_type
&offset_map
,
14755 struct field_info
*fi
,
14756 const std::vector
<variant_part_builder
> &variant_parts
)
14758 if (variant_parts
.empty ())
14761 size_t n
= variant_parts
.size ();
14762 variant_part
*result
= new (obstack
) variant_part
[n
];
14763 for (size_t i
= 0; i
< n
; ++i
)
14764 create_one_variant_part (result
[i
], obstack
, offset_map
, fi
,
14767 return gdb::array_view
<variant_part
> (result
, n
);
14770 /* Compute the variant part vector for FIP, attaching it to TYPE when
14774 add_variant_property (struct field_info
*fip
, struct type
*type
,
14775 struct dwarf2_cu
*cu
)
14777 /* Map section offsets of fields to their field index. Note the
14778 field index here does not take the number of baseclasses into
14780 offset_map_type offset_map
;
14781 for (int i
= 0; i
< fip
->fields
.size (); ++i
)
14782 offset_map
[fip
->fields
[i
].offset
] = i
;
14784 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14785 gdb::array_view
<variant_part
> parts
14786 = create_variant_parts (&objfile
->objfile_obstack
, offset_map
, fip
,
14787 fip
->variant_parts
);
14789 struct dynamic_prop prop
;
14790 prop
.kind
= PROP_VARIANT_PARTS
;
14791 prop
.data
.variant_parts
14792 = ((gdb::array_view
<variant_part
> *)
14793 obstack_copy (&objfile
->objfile_obstack
, &parts
, sizeof (parts
)));
14795 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
14798 /* Create the vector of fields, and attach it to the type. */
14801 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14802 struct dwarf2_cu
*cu
)
14804 int nfields
= fip
->nfields ();
14806 /* Record the field count, allocate space for the array of fields,
14807 and create blank accessibility bitfields if necessary. */
14808 type
->set_num_fields (nfields
);
14810 ((struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
));
14812 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14814 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14816 TYPE_FIELD_PRIVATE_BITS (type
) =
14817 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14818 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14820 TYPE_FIELD_PROTECTED_BITS (type
) =
14821 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14822 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14824 TYPE_FIELD_IGNORE_BITS (type
) =
14825 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14826 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14829 /* If the type has baseclasses, allocate and clear a bit vector for
14830 TYPE_FIELD_VIRTUAL_BITS. */
14831 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
14833 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
14834 unsigned char *pointer
;
14836 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14837 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14838 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14839 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
14840 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
14843 if (!fip
->variant_parts
.empty ())
14844 add_variant_property (fip
, type
, cu
);
14846 /* Copy the saved-up fields into the field vector. */
14847 for (int i
= 0; i
< nfields
; ++i
)
14849 struct nextfield
&field
14850 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
14851 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
14853 type
->field (i
) = field
.field
;
14854 switch (field
.accessibility
)
14856 case DW_ACCESS_private
:
14857 if (cu
->language
!= language_ada
)
14858 SET_TYPE_FIELD_PRIVATE (type
, i
);
14861 case DW_ACCESS_protected
:
14862 if (cu
->language
!= language_ada
)
14863 SET_TYPE_FIELD_PROTECTED (type
, i
);
14866 case DW_ACCESS_public
:
14870 /* Unknown accessibility. Complain and treat it as public. */
14872 complaint (_("unsupported accessibility %d"),
14873 field
.accessibility
);
14877 if (i
< fip
->baseclasses
.size ())
14879 switch (field
.virtuality
)
14881 case DW_VIRTUALITY_virtual
:
14882 case DW_VIRTUALITY_pure_virtual
:
14883 if (cu
->language
== language_ada
)
14884 error (_("unexpected virtuality in component of Ada type"));
14885 SET_TYPE_FIELD_VIRTUAL (type
, i
);
14892 /* Return true if this member function is a constructor, false
14896 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14898 const char *fieldname
;
14899 const char *type_name
;
14902 if (die
->parent
== NULL
)
14905 if (die
->parent
->tag
!= DW_TAG_structure_type
14906 && die
->parent
->tag
!= DW_TAG_union_type
14907 && die
->parent
->tag
!= DW_TAG_class_type
)
14910 fieldname
= dwarf2_name (die
, cu
);
14911 type_name
= dwarf2_name (die
->parent
, cu
);
14912 if (fieldname
== NULL
|| type_name
== NULL
)
14915 len
= strlen (fieldname
);
14916 return (strncmp (fieldname
, type_name
, len
) == 0
14917 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
14920 /* Check if the given VALUE is a recognized enum
14921 dwarf_defaulted_attribute constant according to DWARF5 spec,
14925 is_valid_DW_AT_defaulted (ULONGEST value
)
14929 case DW_DEFAULTED_no
:
14930 case DW_DEFAULTED_in_class
:
14931 case DW_DEFAULTED_out_of_class
:
14935 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
14939 /* Add a member function to the proper fieldlist. */
14942 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
14943 struct type
*type
, struct dwarf2_cu
*cu
)
14945 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14946 struct attribute
*attr
;
14948 struct fnfieldlist
*flp
= nullptr;
14949 struct fn_field
*fnp
;
14950 const char *fieldname
;
14951 struct type
*this_type
;
14952 enum dwarf_access_attribute accessibility
;
14954 if (cu
->language
== language_ada
)
14955 error (_("unexpected member function in Ada type"));
14957 /* Get name of member function. */
14958 fieldname
= dwarf2_name (die
, cu
);
14959 if (fieldname
== NULL
)
14962 /* Look up member function name in fieldlist. */
14963 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
14965 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
14967 flp
= &fip
->fnfieldlists
[i
];
14972 /* Create a new fnfieldlist if necessary. */
14973 if (flp
== nullptr)
14975 fip
->fnfieldlists
.emplace_back ();
14976 flp
= &fip
->fnfieldlists
.back ();
14977 flp
->name
= fieldname
;
14978 i
= fip
->fnfieldlists
.size () - 1;
14981 /* Create a new member function field and add it to the vector of
14983 flp
->fnfields
.emplace_back ();
14984 fnp
= &flp
->fnfields
.back ();
14986 /* Delay processing of the physname until later. */
14987 if (cu
->language
== language_cplus
)
14988 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
14992 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
14993 fnp
->physname
= physname
? physname
: "";
14996 fnp
->type
= alloc_type (objfile
);
14997 this_type
= read_type_die (die
, cu
);
14998 if (this_type
&& this_type
->code () == TYPE_CODE_FUNC
)
15000 int nparams
= this_type
->num_fields ();
15002 /* TYPE is the domain of this method, and THIS_TYPE is the type
15003 of the method itself (TYPE_CODE_METHOD). */
15004 smash_to_method_type (fnp
->type
, type
,
15005 TYPE_TARGET_TYPE (this_type
),
15006 this_type
->fields (),
15007 this_type
->num_fields (),
15008 TYPE_VARARGS (this_type
));
15010 /* Handle static member functions.
15011 Dwarf2 has no clean way to discern C++ static and non-static
15012 member functions. G++ helps GDB by marking the first
15013 parameter for non-static member functions (which is the this
15014 pointer) as artificial. We obtain this information from
15015 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15016 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15017 fnp
->voffset
= VOFFSET_STATIC
;
15020 complaint (_("member function type missing for '%s'"),
15021 dwarf2_full_name (fieldname
, die
, cu
));
15023 /* Get fcontext from DW_AT_containing_type if present. */
15024 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15025 fnp
->fcontext
= die_containing_type (die
, cu
);
15027 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15028 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15030 /* Get accessibility. */
15031 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15032 if (attr
!= nullptr)
15033 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15035 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15036 switch (accessibility
)
15038 case DW_ACCESS_private
:
15039 fnp
->is_private
= 1;
15041 case DW_ACCESS_protected
:
15042 fnp
->is_protected
= 1;
15046 /* Check for artificial methods. */
15047 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15048 if (attr
&& DW_UNSND (attr
) != 0)
15049 fnp
->is_artificial
= 1;
15051 /* Check for defaulted methods. */
15052 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
15053 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
15054 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
15056 /* Check for deleted methods. */
15057 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
15058 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
15059 fnp
->is_deleted
= 1;
15061 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15063 /* Get index in virtual function table if it is a virtual member
15064 function. For older versions of GCC, this is an offset in the
15065 appropriate virtual table, as specified by DW_AT_containing_type.
15066 For everyone else, it is an expression to be evaluated relative
15067 to the object address. */
15069 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15070 if (attr
!= nullptr)
15072 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
> 0)
15074 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15076 /* Old-style GCC. */
15077 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15079 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15080 || (DW_BLOCK (attr
)->size
> 1
15081 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15082 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15084 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15085 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15086 dwarf2_complex_location_expr_complaint ();
15088 fnp
->voffset
/= cu
->header
.addr_size
;
15092 dwarf2_complex_location_expr_complaint ();
15094 if (!fnp
->fcontext
)
15096 /* If there is no `this' field and no DW_AT_containing_type,
15097 we cannot actually find a base class context for the
15099 if (this_type
->num_fields () == 0
15100 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15102 complaint (_("cannot determine context for virtual member "
15103 "function \"%s\" (offset %s)"),
15104 fieldname
, sect_offset_str (die
->sect_off
));
15109 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15113 else if (attr
->form_is_section_offset ())
15115 dwarf2_complex_location_expr_complaint ();
15119 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15125 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15126 if (attr
&& DW_UNSND (attr
))
15128 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15129 complaint (_("Member function \"%s\" (offset %s) is virtual "
15130 "but the vtable offset is not specified"),
15131 fieldname
, sect_offset_str (die
->sect_off
));
15132 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15133 TYPE_CPLUS_DYNAMIC (type
) = 1;
15138 /* Create the vector of member function fields, and attach it to the type. */
15141 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15142 struct dwarf2_cu
*cu
)
15144 if (cu
->language
== language_ada
)
15145 error (_("unexpected member functions in Ada type"));
15147 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15148 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15150 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15152 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15154 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15155 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15157 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15158 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15159 fn_flp
->fn_fields
= (struct fn_field
*)
15160 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15162 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15163 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15166 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15169 /* Returns non-zero if NAME is the name of a vtable member in CU's
15170 language, zero otherwise. */
15172 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15174 static const char vptr
[] = "_vptr";
15176 /* Look for the C++ form of the vtable. */
15177 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15183 /* GCC outputs unnamed structures that are really pointers to member
15184 functions, with the ABI-specified layout. If TYPE describes
15185 such a structure, smash it into a member function type.
15187 GCC shouldn't do this; it should just output pointer to member DIEs.
15188 This is GCC PR debug/28767. */
15191 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15193 struct type
*pfn_type
, *self_type
, *new_type
;
15195 /* Check for a structure with no name and two children. */
15196 if (type
->code () != TYPE_CODE_STRUCT
|| type
->num_fields () != 2)
15199 /* Check for __pfn and __delta members. */
15200 if (TYPE_FIELD_NAME (type
, 0) == NULL
15201 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15202 || TYPE_FIELD_NAME (type
, 1) == NULL
15203 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15206 /* Find the type of the method. */
15207 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15208 if (pfn_type
== NULL
15209 || pfn_type
->code () != TYPE_CODE_PTR
15210 || TYPE_TARGET_TYPE (pfn_type
)->code () != TYPE_CODE_FUNC
)
15213 /* Look for the "this" argument. */
15214 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15215 if (pfn_type
->num_fields () == 0
15216 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15217 || TYPE_FIELD_TYPE (pfn_type
, 0)->code () != TYPE_CODE_PTR
)
15220 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15221 new_type
= alloc_type (objfile
);
15222 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15223 pfn_type
->fields (), pfn_type
->num_fields (),
15224 TYPE_VARARGS (pfn_type
));
15225 smash_to_methodptr_type (type
, new_type
);
15228 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15229 appropriate error checking and issuing complaints if there is a
15233 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15235 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15237 if (attr
== nullptr)
15240 if (!attr
->form_is_constant ())
15242 complaint (_("DW_AT_alignment must have constant form"
15243 " - DIE at %s [in module %s]"),
15244 sect_offset_str (die
->sect_off
),
15245 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15250 if (attr
->form
== DW_FORM_sdata
)
15252 LONGEST val
= DW_SND (attr
);
15255 complaint (_("DW_AT_alignment value must not be negative"
15256 " - DIE at %s [in module %s]"),
15257 sect_offset_str (die
->sect_off
),
15258 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15264 align
= DW_UNSND (attr
);
15268 complaint (_("DW_AT_alignment value must not be zero"
15269 " - DIE at %s [in module %s]"),
15270 sect_offset_str (die
->sect_off
),
15271 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15274 if ((align
& (align
- 1)) != 0)
15276 complaint (_("DW_AT_alignment value must be a power of 2"
15277 " - DIE at %s [in module %s]"),
15278 sect_offset_str (die
->sect_off
),
15279 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15286 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15287 the alignment for TYPE. */
15290 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15293 if (!set_type_align (type
, get_alignment (cu
, die
)))
15294 complaint (_("DW_AT_alignment value too large"
15295 " - DIE at %s [in module %s]"),
15296 sect_offset_str (die
->sect_off
),
15297 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15300 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15301 constant for a type, according to DWARF5 spec, Table 5.5. */
15304 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
15309 case DW_CC_pass_by_reference
:
15310 case DW_CC_pass_by_value
:
15314 complaint (_("unrecognized DW_AT_calling_convention value "
15315 "(%s) for a type"), pulongest (value
));
15320 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15321 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
15322 also according to GNU-specific values (see include/dwarf2.h). */
15325 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15330 case DW_CC_program
:
15334 case DW_CC_GNU_renesas_sh
:
15335 case DW_CC_GNU_borland_fastcall_i386
:
15336 case DW_CC_GDB_IBM_OpenCL
:
15340 complaint (_("unrecognized DW_AT_calling_convention value "
15341 "(%s) for a subroutine"), pulongest (value
));
15346 /* Called when we find the DIE that starts a structure or union scope
15347 (definition) to create a type for the structure or union. Fill in
15348 the type's name and general properties; the members will not be
15349 processed until process_structure_scope. A symbol table entry for
15350 the type will also not be done until process_structure_scope (assuming
15351 the type has a name).
15353 NOTE: we need to call these functions regardless of whether or not the
15354 DIE has a DW_AT_name attribute, since it might be an anonymous
15355 structure or union. This gets the type entered into our set of
15356 user defined types. */
15358 static struct type
*
15359 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15361 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15363 struct attribute
*attr
;
15366 /* If the definition of this type lives in .debug_types, read that type.
15367 Don't follow DW_AT_specification though, that will take us back up
15368 the chain and we want to go down. */
15369 attr
= die
->attr (DW_AT_signature
);
15370 if (attr
!= nullptr)
15372 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15374 /* The type's CU may not be the same as CU.
15375 Ensure TYPE is recorded with CU in die_type_hash. */
15376 return set_die_type (die
, type
, cu
);
15379 type
= alloc_type (objfile
);
15380 INIT_CPLUS_SPECIFIC (type
);
15382 name
= dwarf2_name (die
, cu
);
15385 if (cu
->language
== language_cplus
15386 || cu
->language
== language_d
15387 || cu
->language
== language_rust
)
15389 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15391 /* dwarf2_full_name might have already finished building the DIE's
15392 type. If so, there is no need to continue. */
15393 if (get_die_type (die
, cu
) != NULL
)
15394 return get_die_type (die
, cu
);
15396 type
->set_name (full_name
);
15400 /* The name is already allocated along with this objfile, so
15401 we don't need to duplicate it for the type. */
15402 type
->set_name (name
);
15406 if (die
->tag
== DW_TAG_structure_type
)
15408 type
->set_code (TYPE_CODE_STRUCT
);
15410 else if (die
->tag
== DW_TAG_union_type
)
15412 type
->set_code (TYPE_CODE_UNION
);
15416 type
->set_code (TYPE_CODE_STRUCT
);
15419 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15420 TYPE_DECLARED_CLASS (type
) = 1;
15422 /* Store the calling convention in the type if it's available in
15423 the die. Otherwise the calling convention remains set to
15424 the default value DW_CC_normal. */
15425 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15426 if (attr
!= nullptr
15427 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
15429 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15430 TYPE_CPLUS_CALLING_CONVENTION (type
)
15431 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
15434 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15435 if (attr
!= nullptr)
15437 if (attr
->form_is_constant ())
15438 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15441 struct dynamic_prop prop
;
15442 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
15443 cu
->per_cu
->addr_type ()))
15444 type
->add_dyn_prop (DYN_PROP_BYTE_SIZE
, prop
);
15445 TYPE_LENGTH (type
) = 0;
15450 TYPE_LENGTH (type
) = 0;
15453 maybe_set_alignment (cu
, die
, type
);
15455 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15457 /* ICC<14 does not output the required DW_AT_declaration on
15458 incomplete types, but gives them a size of zero. */
15459 TYPE_STUB (type
) = 1;
15462 TYPE_STUB_SUPPORTED (type
) = 1;
15464 if (die_is_declaration (die
, cu
))
15465 TYPE_STUB (type
) = 1;
15466 else if (attr
== NULL
&& die
->child
== NULL
15467 && producer_is_realview (cu
->producer
))
15468 /* RealView does not output the required DW_AT_declaration
15469 on incomplete types. */
15470 TYPE_STUB (type
) = 1;
15472 /* We need to add the type field to the die immediately so we don't
15473 infinitely recurse when dealing with pointers to the structure
15474 type within the structure itself. */
15475 set_die_type (die
, type
, cu
);
15477 /* set_die_type should be already done. */
15478 set_descriptive_type (type
, die
, cu
);
15483 static void handle_struct_member_die
15484 (struct die_info
*child_die
,
15486 struct field_info
*fi
,
15487 std::vector
<struct symbol
*> *template_args
,
15488 struct dwarf2_cu
*cu
);
15490 /* A helper for handle_struct_member_die that handles
15491 DW_TAG_variant_part. */
15494 handle_variant_part (struct die_info
*die
, struct type
*type
,
15495 struct field_info
*fi
,
15496 std::vector
<struct symbol
*> *template_args
,
15497 struct dwarf2_cu
*cu
)
15499 variant_part_builder
*new_part
;
15500 if (fi
->current_variant_part
== nullptr)
15502 fi
->variant_parts
.emplace_back ();
15503 new_part
= &fi
->variant_parts
.back ();
15505 else if (!fi
->current_variant_part
->processing_variant
)
15507 complaint (_("nested DW_TAG_variant_part seen "
15508 "- DIE at %s [in module %s]"),
15509 sect_offset_str (die
->sect_off
),
15510 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15515 variant_field
¤t
= fi
->current_variant_part
->variants
.back ();
15516 current
.variant_parts
.emplace_back ();
15517 new_part
= ¤t
.variant_parts
.back ();
15520 /* When we recurse, we want callees to add to this new variant
15522 scoped_restore save_current_variant_part
15523 = make_scoped_restore (&fi
->current_variant_part
, new_part
);
15525 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15528 /* It's a univariant form, an extension we support. */
15530 else if (discr
->form_is_ref ())
15532 struct dwarf2_cu
*target_cu
= cu
;
15533 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15535 new_part
->discriminant_offset
= target_die
->sect_off
;
15539 complaint (_("DW_AT_discr does not have DIE reference form"
15540 " - DIE at %s [in module %s]"),
15541 sect_offset_str (die
->sect_off
),
15542 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15545 for (die_info
*child_die
= die
->child
;
15547 child_die
= child_die
->sibling
)
15548 handle_struct_member_die (child_die
, type
, fi
, template_args
, cu
);
15551 /* A helper for handle_struct_member_die that handles
15555 handle_variant (struct die_info
*die
, struct type
*type
,
15556 struct field_info
*fi
,
15557 std::vector
<struct symbol
*> *template_args
,
15558 struct dwarf2_cu
*cu
)
15560 if (fi
->current_variant_part
== nullptr)
15562 complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part "
15563 "- DIE at %s [in module %s]"),
15564 sect_offset_str (die
->sect_off
),
15565 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15568 if (fi
->current_variant_part
->processing_variant
)
15570 complaint (_("nested DW_TAG_variant seen "
15571 "- DIE at %s [in module %s]"),
15572 sect_offset_str (die
->sect_off
),
15573 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15577 scoped_restore save_processing_variant
15578 = make_scoped_restore (&fi
->current_variant_part
->processing_variant
,
15581 fi
->current_variant_part
->variants
.emplace_back ();
15582 variant_field
&variant
= fi
->current_variant_part
->variants
.back ();
15583 variant
.first_field
= fi
->fields
.size ();
15585 /* In a variant we want to get the discriminant and also add a
15586 field for our sole member child. */
15587 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr_value
, cu
);
15588 if (discr
== nullptr)
15590 discr
= dwarf2_attr (die
, DW_AT_discr_list
, cu
);
15591 if (discr
== nullptr || DW_BLOCK (discr
)->size
== 0)
15592 variant
.default_branch
= true;
15594 variant
.discr_list_data
= DW_BLOCK (discr
);
15597 variant
.discriminant_value
= DW_UNSND (discr
);
15599 for (die_info
*variant_child
= die
->child
;
15600 variant_child
!= NULL
;
15601 variant_child
= variant_child
->sibling
)
15602 handle_struct_member_die (variant_child
, type
, fi
, template_args
, cu
);
15604 variant
.last_field
= fi
->fields
.size ();
15607 /* A helper for process_structure_scope that handles a single member
15611 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15612 struct field_info
*fi
,
15613 std::vector
<struct symbol
*> *template_args
,
15614 struct dwarf2_cu
*cu
)
15616 if (child_die
->tag
== DW_TAG_member
15617 || child_die
->tag
== DW_TAG_variable
)
15619 /* NOTE: carlton/2002-11-05: A C++ static data member
15620 should be a DW_TAG_member that is a declaration, but
15621 all versions of G++ as of this writing (so through at
15622 least 3.2.1) incorrectly generate DW_TAG_variable
15623 tags for them instead. */
15624 dwarf2_add_field (fi
, child_die
, cu
);
15626 else if (child_die
->tag
== DW_TAG_subprogram
)
15628 /* Rust doesn't have member functions in the C++ sense.
15629 However, it does emit ordinary functions as children
15630 of a struct DIE. */
15631 if (cu
->language
== language_rust
)
15632 read_func_scope (child_die
, cu
);
15635 /* C++ member function. */
15636 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15639 else if (child_die
->tag
== DW_TAG_inheritance
)
15641 /* C++ base class field. */
15642 dwarf2_add_field (fi
, child_die
, cu
);
15644 else if (type_can_define_types (child_die
))
15645 dwarf2_add_type_defn (fi
, child_die
, cu
);
15646 else if (child_die
->tag
== DW_TAG_template_type_param
15647 || child_die
->tag
== DW_TAG_template_value_param
)
15649 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15652 template_args
->push_back (arg
);
15654 else if (child_die
->tag
== DW_TAG_variant_part
)
15655 handle_variant_part (child_die
, type
, fi
, template_args
, cu
);
15656 else if (child_die
->tag
== DW_TAG_variant
)
15657 handle_variant (child_die
, type
, fi
, template_args
, cu
);
15660 /* Finish creating a structure or union type, including filling in
15661 its members and creating a symbol for it. */
15664 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15666 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15667 struct die_info
*child_die
;
15670 type
= get_die_type (die
, cu
);
15672 type
= read_structure_type (die
, cu
);
15674 bool has_template_parameters
= false;
15675 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15677 struct field_info fi
;
15678 std::vector
<struct symbol
*> template_args
;
15680 child_die
= die
->child
;
15682 while (child_die
&& child_die
->tag
)
15684 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15685 child_die
= child_die
->sibling
;
15688 /* Attach template arguments to type. */
15689 if (!template_args
.empty ())
15691 has_template_parameters
= true;
15692 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15693 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15694 TYPE_TEMPLATE_ARGUMENTS (type
)
15695 = XOBNEWVEC (&objfile
->objfile_obstack
,
15697 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15698 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15699 template_args
.data (),
15700 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15701 * sizeof (struct symbol
*)));
15704 /* Attach fields and member functions to the type. */
15705 if (fi
.nfields () > 0)
15706 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15707 if (!fi
.fnfieldlists
.empty ())
15709 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15711 /* Get the type which refers to the base class (possibly this
15712 class itself) which contains the vtable pointer for the current
15713 class from the DW_AT_containing_type attribute. This use of
15714 DW_AT_containing_type is a GNU extension. */
15716 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15718 struct type
*t
= die_containing_type (die
, cu
);
15720 set_type_vptr_basetype (type
, t
);
15725 /* Our own class provides vtbl ptr. */
15726 for (i
= t
->num_fields () - 1;
15727 i
>= TYPE_N_BASECLASSES (t
);
15730 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15732 if (is_vtable_name (fieldname
, cu
))
15734 set_type_vptr_fieldno (type
, i
);
15739 /* Complain if virtual function table field not found. */
15740 if (i
< TYPE_N_BASECLASSES (t
))
15741 complaint (_("virtual function table pointer "
15742 "not found when defining class '%s'"),
15743 type
->name () ? type
->name () : "");
15747 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15750 else if (cu
->producer
15751 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15753 /* The IBM XLC compiler does not provide direct indication
15754 of the containing type, but the vtable pointer is
15755 always named __vfp. */
15759 for (i
= type
->num_fields () - 1;
15760 i
>= TYPE_N_BASECLASSES (type
);
15763 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15765 set_type_vptr_fieldno (type
, i
);
15766 set_type_vptr_basetype (type
, type
);
15773 /* Copy fi.typedef_field_list linked list elements content into the
15774 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15775 if (!fi
.typedef_field_list
.empty ())
15777 int count
= fi
.typedef_field_list
.size ();
15779 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15780 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15781 = ((struct decl_field
*)
15783 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15784 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15786 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15787 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15790 /* Copy fi.nested_types_list linked list elements content into the
15791 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15792 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15794 int count
= fi
.nested_types_list
.size ();
15796 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15797 TYPE_NESTED_TYPES_ARRAY (type
)
15798 = ((struct decl_field
*)
15799 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15800 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15802 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15803 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15807 quirk_gcc_member_function_pointer (type
, objfile
);
15808 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15809 cu
->rust_unions
.push_back (type
);
15811 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15812 snapshots) has been known to create a die giving a declaration
15813 for a class that has, as a child, a die giving a definition for a
15814 nested class. So we have to process our children even if the
15815 current die is a declaration. Normally, of course, a declaration
15816 won't have any children at all. */
15818 child_die
= die
->child
;
15820 while (child_die
!= NULL
&& child_die
->tag
)
15822 if (child_die
->tag
== DW_TAG_member
15823 || child_die
->tag
== DW_TAG_variable
15824 || child_die
->tag
== DW_TAG_inheritance
15825 || child_die
->tag
== DW_TAG_template_value_param
15826 || child_die
->tag
== DW_TAG_template_type_param
)
15831 process_die (child_die
, cu
);
15833 child_die
= child_die
->sibling
;
15836 /* Do not consider external references. According to the DWARF standard,
15837 these DIEs are identified by the fact that they have no byte_size
15838 attribute, and a declaration attribute. */
15839 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
15840 || !die_is_declaration (die
, cu
)
15841 || dwarf2_attr (die
, DW_AT_signature
, cu
) != NULL
)
15843 struct symbol
*sym
= new_symbol (die
, type
, cu
);
15845 if (has_template_parameters
)
15847 struct symtab
*symtab
;
15848 if (sym
!= nullptr)
15849 symtab
= symbol_symtab (sym
);
15850 else if (cu
->line_header
!= nullptr)
15852 /* Any related symtab will do. */
15854 = cu
->line_header
->file_names ()[0].symtab
;
15859 complaint (_("could not find suitable "
15860 "symtab for template parameter"
15861 " - DIE at %s [in module %s]"),
15862 sect_offset_str (die
->sect_off
),
15863 objfile_name (objfile
));
15866 if (symtab
!= nullptr)
15868 /* Make sure that the symtab is set on the new symbols.
15869 Even though they don't appear in this symtab directly,
15870 other parts of gdb assume that symbols do, and this is
15871 reasonably true. */
15872 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
15873 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
15879 /* Assuming DIE is an enumeration type, and TYPE is its associated
15880 type, update TYPE using some information only available in DIE's
15881 children. In particular, the fields are computed. */
15884 update_enumeration_type_from_children (struct die_info
*die
,
15886 struct dwarf2_cu
*cu
)
15888 struct die_info
*child_die
;
15889 int unsigned_enum
= 1;
15892 auto_obstack obstack
;
15893 std::vector
<struct field
> fields
;
15895 for (child_die
= die
->child
;
15896 child_die
!= NULL
&& child_die
->tag
;
15897 child_die
= child_die
->sibling
)
15899 struct attribute
*attr
;
15901 const gdb_byte
*bytes
;
15902 struct dwarf2_locexpr_baton
*baton
;
15905 if (child_die
->tag
!= DW_TAG_enumerator
)
15908 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
15912 name
= dwarf2_name (child_die
, cu
);
15914 name
= "<anonymous enumerator>";
15916 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
15917 &value
, &bytes
, &baton
);
15925 if (count_one_bits_ll (value
) >= 2)
15929 fields
.emplace_back ();
15930 struct field
&field
= fields
.back ();
15931 FIELD_NAME (field
) = dwarf2_physname (name
, child_die
, cu
);
15932 SET_FIELD_ENUMVAL (field
, value
);
15935 if (!fields
.empty ())
15937 type
->set_num_fields (fields
.size ());
15940 TYPE_ALLOC (type
, sizeof (struct field
) * fields
.size ()));
15941 memcpy (type
->fields (), fields
.data (),
15942 sizeof (struct field
) * fields
.size ());
15946 TYPE_UNSIGNED (type
) = 1;
15948 TYPE_FLAG_ENUM (type
) = 1;
15951 /* Given a DW_AT_enumeration_type die, set its type. We do not
15952 complete the type's fields yet, or create any symbols. */
15954 static struct type
*
15955 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15957 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15959 struct attribute
*attr
;
15962 /* If the definition of this type lives in .debug_types, read that type.
15963 Don't follow DW_AT_specification though, that will take us back up
15964 the chain and we want to go down. */
15965 attr
= die
->attr (DW_AT_signature
);
15966 if (attr
!= nullptr)
15968 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15970 /* The type's CU may not be the same as CU.
15971 Ensure TYPE is recorded with CU in die_type_hash. */
15972 return set_die_type (die
, type
, cu
);
15975 type
= alloc_type (objfile
);
15977 type
->set_code (TYPE_CODE_ENUM
);
15978 name
= dwarf2_full_name (NULL
, die
, cu
);
15980 type
->set_name (name
);
15982 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
15985 struct type
*underlying_type
= die_type (die
, cu
);
15987 TYPE_TARGET_TYPE (type
) = underlying_type
;
15990 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15991 if (attr
!= nullptr)
15993 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15997 TYPE_LENGTH (type
) = 0;
16000 maybe_set_alignment (cu
, die
, type
);
16002 /* The enumeration DIE can be incomplete. In Ada, any type can be
16003 declared as private in the package spec, and then defined only
16004 inside the package body. Such types are known as Taft Amendment
16005 Types. When another package uses such a type, an incomplete DIE
16006 may be generated by the compiler. */
16007 if (die_is_declaration (die
, cu
))
16008 TYPE_STUB (type
) = 1;
16010 /* If this type has an underlying type that is not a stub, then we
16011 may use its attributes. We always use the "unsigned" attribute
16012 in this situation, because ordinarily we guess whether the type
16013 is unsigned -- but the guess can be wrong and the underlying type
16014 can tell us the reality. However, we defer to a local size
16015 attribute if one exists, because this lets the compiler override
16016 the underlying type if needed. */
16017 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16019 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
16020 underlying_type
= check_typedef (underlying_type
);
16021 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (underlying_type
);
16022 if (TYPE_LENGTH (type
) == 0)
16023 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
16024 if (TYPE_RAW_ALIGN (type
) == 0
16025 && TYPE_RAW_ALIGN (underlying_type
) != 0)
16026 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
16029 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16031 set_die_type (die
, type
, cu
);
16033 /* Finish the creation of this type by using the enum's children.
16034 Note that, as usual, this must come after set_die_type to avoid
16035 infinite recursion when trying to compute the names of the
16037 update_enumeration_type_from_children (die
, type
, cu
);
16042 /* Given a pointer to a die which begins an enumeration, process all
16043 the dies that define the members of the enumeration, and create the
16044 symbol for the enumeration type.
16046 NOTE: We reverse the order of the element list. */
16049 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16051 struct type
*this_type
;
16053 this_type
= get_die_type (die
, cu
);
16054 if (this_type
== NULL
)
16055 this_type
= read_enumeration_type (die
, cu
);
16057 if (die
->child
!= NULL
)
16059 struct die_info
*child_die
;
16062 child_die
= die
->child
;
16063 while (child_die
&& child_die
->tag
)
16065 if (child_die
->tag
!= DW_TAG_enumerator
)
16067 process_die (child_die
, cu
);
16071 name
= dwarf2_name (child_die
, cu
);
16073 new_symbol (child_die
, this_type
, cu
);
16076 child_die
= child_die
->sibling
;
16080 /* If we are reading an enum from a .debug_types unit, and the enum
16081 is a declaration, and the enum is not the signatured type in the
16082 unit, then we do not want to add a symbol for it. Adding a
16083 symbol would in some cases obscure the true definition of the
16084 enum, giving users an incomplete type when the definition is
16085 actually available. Note that we do not want to do this for all
16086 enums which are just declarations, because C++0x allows forward
16087 enum declarations. */
16088 if (cu
->per_cu
->is_debug_types
16089 && die_is_declaration (die
, cu
))
16091 struct signatured_type
*sig_type
;
16093 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16094 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16095 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16099 new_symbol (die
, this_type
, cu
);
16102 /* Extract all information from a DW_TAG_array_type DIE and put it in
16103 the DIE's type field. For now, this only handles one dimensional
16106 static struct type
*
16107 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16109 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16110 struct die_info
*child_die
;
16112 struct type
*element_type
, *range_type
, *index_type
;
16113 struct attribute
*attr
;
16115 struct dynamic_prop
*byte_stride_prop
= NULL
;
16116 unsigned int bit_stride
= 0;
16118 element_type
= die_type (die
, cu
);
16120 /* The die_type call above may have already set the type for this DIE. */
16121 type
= get_die_type (die
, cu
);
16125 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16129 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
16132 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16133 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16137 complaint (_("unable to read array DW_AT_byte_stride "
16138 " - DIE at %s [in module %s]"),
16139 sect_offset_str (die
->sect_off
),
16140 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16141 /* Ignore this attribute. We will likely not be able to print
16142 arrays of this type correctly, but there is little we can do
16143 to help if we cannot read the attribute's value. */
16144 byte_stride_prop
= NULL
;
16148 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16150 bit_stride
= DW_UNSND (attr
);
16152 /* Irix 6.2 native cc creates array types without children for
16153 arrays with unspecified length. */
16154 if (die
->child
== NULL
)
16156 index_type
= objfile_type (objfile
)->builtin_int
;
16157 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16158 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16159 byte_stride_prop
, bit_stride
);
16160 return set_die_type (die
, type
, cu
);
16163 std::vector
<struct type
*> range_types
;
16164 child_die
= die
->child
;
16165 while (child_die
&& child_die
->tag
)
16167 if (child_die
->tag
== DW_TAG_subrange_type
)
16169 struct type
*child_type
= read_type_die (child_die
, cu
);
16171 if (child_type
!= NULL
)
16173 /* The range type was succesfully read. Save it for the
16174 array type creation. */
16175 range_types
.push_back (child_type
);
16178 child_die
= child_die
->sibling
;
16181 /* Dwarf2 dimensions are output from left to right, create the
16182 necessary array types in backwards order. */
16184 type
= element_type
;
16186 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16190 while (i
< range_types
.size ())
16191 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16192 byte_stride_prop
, bit_stride
);
16196 size_t ndim
= range_types
.size ();
16198 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16199 byte_stride_prop
, bit_stride
);
16202 /* Understand Dwarf2 support for vector types (like they occur on
16203 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16204 array type. This is not part of the Dwarf2/3 standard yet, but a
16205 custom vendor extension. The main difference between a regular
16206 array and the vector variant is that vectors are passed by value
16208 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16209 if (attr
!= nullptr)
16210 make_vector_type (type
);
16212 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16213 implementation may choose to implement triple vectors using this
16215 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16216 if (attr
!= nullptr)
16218 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16219 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16221 complaint (_("DW_AT_byte_size for array type smaller "
16222 "than the total size of elements"));
16225 name
= dwarf2_name (die
, cu
);
16227 type
->set_name (name
);
16229 maybe_set_alignment (cu
, die
, type
);
16231 /* Install the type in the die. */
16232 set_die_type (die
, type
, cu
);
16234 /* set_die_type should be already done. */
16235 set_descriptive_type (type
, die
, cu
);
16240 static enum dwarf_array_dim_ordering
16241 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16243 struct attribute
*attr
;
16245 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16247 if (attr
!= nullptr)
16248 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16250 /* GNU F77 is a special case, as at 08/2004 array type info is the
16251 opposite order to the dwarf2 specification, but data is still
16252 laid out as per normal fortran.
16254 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16255 version checking. */
16257 if (cu
->language
== language_fortran
16258 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16260 return DW_ORD_row_major
;
16263 switch (cu
->language_defn
->la_array_ordering
)
16265 case array_column_major
:
16266 return DW_ORD_col_major
;
16267 case array_row_major
:
16269 return DW_ORD_row_major
;
16273 /* Extract all information from a DW_TAG_set_type DIE and put it in
16274 the DIE's type field. */
16276 static struct type
*
16277 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16279 struct type
*domain_type
, *set_type
;
16280 struct attribute
*attr
;
16282 domain_type
= die_type (die
, cu
);
16284 /* The die_type call above may have already set the type for this DIE. */
16285 set_type
= get_die_type (die
, cu
);
16289 set_type
= create_set_type (NULL
, domain_type
);
16291 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16292 if (attr
!= nullptr)
16293 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16295 maybe_set_alignment (cu
, die
, set_type
);
16297 return set_die_type (die
, set_type
, cu
);
16300 /* A helper for read_common_block that creates a locexpr baton.
16301 SYM is the symbol which we are marking as computed.
16302 COMMON_DIE is the DIE for the common block.
16303 COMMON_LOC is the location expression attribute for the common
16305 MEMBER_LOC is the location expression attribute for the particular
16306 member of the common block that we are processing.
16307 CU is the CU from which the above come. */
16310 mark_common_block_symbol_computed (struct symbol
*sym
,
16311 struct die_info
*common_die
,
16312 struct attribute
*common_loc
,
16313 struct attribute
*member_loc
,
16314 struct dwarf2_cu
*cu
)
16316 dwarf2_per_objfile
*per_objfile
= cu
->per_cu
->dwarf2_per_objfile
;
16317 struct objfile
*objfile
= per_objfile
->objfile
;
16318 struct dwarf2_locexpr_baton
*baton
;
16320 unsigned int cu_off
;
16321 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
16322 LONGEST offset
= 0;
16324 gdb_assert (common_loc
&& member_loc
);
16325 gdb_assert (common_loc
->form_is_block ());
16326 gdb_assert (member_loc
->form_is_block ()
16327 || member_loc
->form_is_constant ());
16329 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16330 baton
->per_objfile
= per_objfile
;
16331 baton
->per_cu
= cu
->per_cu
;
16332 gdb_assert (baton
->per_cu
);
16334 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16336 if (member_loc
->form_is_constant ())
16338 offset
= member_loc
->constant_value (0);
16339 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16342 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16344 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16347 *ptr
++ = DW_OP_call4
;
16348 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16349 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16352 if (member_loc
->form_is_constant ())
16354 *ptr
++ = DW_OP_addr
;
16355 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16356 ptr
+= cu
->header
.addr_size
;
16360 /* We have to copy the data here, because DW_OP_call4 will only
16361 use a DW_AT_location attribute. */
16362 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16363 ptr
+= DW_BLOCK (member_loc
)->size
;
16366 *ptr
++ = DW_OP_plus
;
16367 gdb_assert (ptr
- baton
->data
== baton
->size
);
16369 SYMBOL_LOCATION_BATON (sym
) = baton
;
16370 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16373 /* Create appropriate locally-scoped variables for all the
16374 DW_TAG_common_block entries. Also create a struct common_block
16375 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16376 is used to separate the common blocks name namespace from regular
16380 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16382 struct attribute
*attr
;
16384 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16385 if (attr
!= nullptr)
16387 /* Support the .debug_loc offsets. */
16388 if (attr
->form_is_block ())
16392 else if (attr
->form_is_section_offset ())
16394 dwarf2_complex_location_expr_complaint ();
16399 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16400 "common block member");
16405 if (die
->child
!= NULL
)
16407 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16408 struct die_info
*child_die
;
16409 size_t n_entries
= 0, size
;
16410 struct common_block
*common_block
;
16411 struct symbol
*sym
;
16413 for (child_die
= die
->child
;
16414 child_die
&& child_die
->tag
;
16415 child_die
= child_die
->sibling
)
16418 size
= (sizeof (struct common_block
)
16419 + (n_entries
- 1) * sizeof (struct symbol
*));
16421 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16423 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16424 common_block
->n_entries
= 0;
16426 for (child_die
= die
->child
;
16427 child_die
&& child_die
->tag
;
16428 child_die
= child_die
->sibling
)
16430 /* Create the symbol in the DW_TAG_common_block block in the current
16432 sym
= new_symbol (child_die
, NULL
, cu
);
16435 struct attribute
*member_loc
;
16437 common_block
->contents
[common_block
->n_entries
++] = sym
;
16439 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16443 /* GDB has handled this for a long time, but it is
16444 not specified by DWARF. It seems to have been
16445 emitted by gfortran at least as recently as:
16446 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16447 complaint (_("Variable in common block has "
16448 "DW_AT_data_member_location "
16449 "- DIE at %s [in module %s]"),
16450 sect_offset_str (child_die
->sect_off
),
16451 objfile_name (objfile
));
16453 if (member_loc
->form_is_section_offset ())
16454 dwarf2_complex_location_expr_complaint ();
16455 else if (member_loc
->form_is_constant ()
16456 || member_loc
->form_is_block ())
16458 if (attr
!= nullptr)
16459 mark_common_block_symbol_computed (sym
, die
, attr
,
16463 dwarf2_complex_location_expr_complaint ();
16468 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16469 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16473 /* Create a type for a C++ namespace. */
16475 static struct type
*
16476 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16478 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16479 const char *previous_prefix
, *name
;
16483 /* For extensions, reuse the type of the original namespace. */
16484 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16486 struct die_info
*ext_die
;
16487 struct dwarf2_cu
*ext_cu
= cu
;
16489 ext_die
= dwarf2_extension (die
, &ext_cu
);
16490 type
= read_type_die (ext_die
, ext_cu
);
16492 /* EXT_CU may not be the same as CU.
16493 Ensure TYPE is recorded with CU in die_type_hash. */
16494 return set_die_type (die
, type
, cu
);
16497 name
= namespace_name (die
, &is_anonymous
, cu
);
16499 /* Now build the name of the current namespace. */
16501 previous_prefix
= determine_prefix (die
, cu
);
16502 if (previous_prefix
[0] != '\0')
16503 name
= typename_concat (&objfile
->objfile_obstack
,
16504 previous_prefix
, name
, 0, cu
);
16506 /* Create the type. */
16507 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16509 return set_die_type (die
, type
, cu
);
16512 /* Read a namespace scope. */
16515 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16517 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16520 /* Add a symbol associated to this if we haven't seen the namespace
16521 before. Also, add a using directive if it's an anonymous
16524 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16528 type
= read_type_die (die
, cu
);
16529 new_symbol (die
, type
, cu
);
16531 namespace_name (die
, &is_anonymous
, cu
);
16534 const char *previous_prefix
= determine_prefix (die
, cu
);
16536 std::vector
<const char *> excludes
;
16537 add_using_directive (using_directives (cu
),
16538 previous_prefix
, type
->name (), NULL
,
16539 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16543 if (die
->child
!= NULL
)
16545 struct die_info
*child_die
= die
->child
;
16547 while (child_die
&& child_die
->tag
)
16549 process_die (child_die
, cu
);
16550 child_die
= child_die
->sibling
;
16555 /* Read a Fortran module as type. This DIE can be only a declaration used for
16556 imported module. Still we need that type as local Fortran "use ... only"
16557 declaration imports depend on the created type in determine_prefix. */
16559 static struct type
*
16560 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16562 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16563 const char *module_name
;
16566 module_name
= dwarf2_name (die
, cu
);
16567 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16569 return set_die_type (die
, type
, cu
);
16572 /* Read a Fortran module. */
16575 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16577 struct die_info
*child_die
= die
->child
;
16580 type
= read_type_die (die
, cu
);
16581 new_symbol (die
, type
, cu
);
16583 while (child_die
&& child_die
->tag
)
16585 process_die (child_die
, cu
);
16586 child_die
= child_die
->sibling
;
16590 /* Return the name of the namespace represented by DIE. Set
16591 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16594 static const char *
16595 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16597 struct die_info
*current_die
;
16598 const char *name
= NULL
;
16600 /* Loop through the extensions until we find a name. */
16602 for (current_die
= die
;
16603 current_die
!= NULL
;
16604 current_die
= dwarf2_extension (die
, &cu
))
16606 /* We don't use dwarf2_name here so that we can detect the absence
16607 of a name -> anonymous namespace. */
16608 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16614 /* Is it an anonymous namespace? */
16616 *is_anonymous
= (name
== NULL
);
16618 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16623 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16624 the user defined type vector. */
16626 static struct type
*
16627 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16629 struct gdbarch
*gdbarch
16630 = cu
->per_cu
->dwarf2_per_objfile
->objfile
->arch ();
16631 struct comp_unit_head
*cu_header
= &cu
->header
;
16633 struct attribute
*attr_byte_size
;
16634 struct attribute
*attr_address_class
;
16635 int byte_size
, addr_class
;
16636 struct type
*target_type
;
16638 target_type
= die_type (die
, cu
);
16640 /* The die_type call above may have already set the type for this DIE. */
16641 type
= get_die_type (die
, cu
);
16645 type
= lookup_pointer_type (target_type
);
16647 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16648 if (attr_byte_size
)
16649 byte_size
= DW_UNSND (attr_byte_size
);
16651 byte_size
= cu_header
->addr_size
;
16653 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16654 if (attr_address_class
)
16655 addr_class
= DW_UNSND (attr_address_class
);
16657 addr_class
= DW_ADDR_none
;
16659 ULONGEST alignment
= get_alignment (cu
, die
);
16661 /* If the pointer size, alignment, or address class is different
16662 than the default, create a type variant marked as such and set
16663 the length accordingly. */
16664 if (TYPE_LENGTH (type
) != byte_size
16665 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16666 && alignment
!= TYPE_RAW_ALIGN (type
))
16667 || addr_class
!= DW_ADDR_none
)
16669 if (gdbarch_address_class_type_flags_p (gdbarch
))
16673 type_flags
= gdbarch_address_class_type_flags
16674 (gdbarch
, byte_size
, addr_class
);
16675 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16677 type
= make_type_with_address_space (type
, type_flags
);
16679 else if (TYPE_LENGTH (type
) != byte_size
)
16681 complaint (_("invalid pointer size %d"), byte_size
);
16683 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16685 complaint (_("Invalid DW_AT_alignment"
16686 " - DIE at %s [in module %s]"),
16687 sect_offset_str (die
->sect_off
),
16688 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16692 /* Should we also complain about unhandled address classes? */
16696 TYPE_LENGTH (type
) = byte_size
;
16697 set_type_align (type
, alignment
);
16698 return set_die_type (die
, type
, cu
);
16701 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16702 the user defined type vector. */
16704 static struct type
*
16705 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16708 struct type
*to_type
;
16709 struct type
*domain
;
16711 to_type
= die_type (die
, cu
);
16712 domain
= die_containing_type (die
, cu
);
16714 /* The calls above may have already set the type for this DIE. */
16715 type
= get_die_type (die
, cu
);
16719 if (check_typedef (to_type
)->code () == TYPE_CODE_METHOD
)
16720 type
= lookup_methodptr_type (to_type
);
16721 else if (check_typedef (to_type
)->code () == TYPE_CODE_FUNC
)
16723 struct type
*new_type
16724 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16726 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16727 to_type
->fields (), to_type
->num_fields (),
16728 TYPE_VARARGS (to_type
));
16729 type
= lookup_methodptr_type (new_type
);
16732 type
= lookup_memberptr_type (to_type
, domain
);
16734 return set_die_type (die
, type
, cu
);
16737 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16738 the user defined type vector. */
16740 static struct type
*
16741 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16742 enum type_code refcode
)
16744 struct comp_unit_head
*cu_header
= &cu
->header
;
16745 struct type
*type
, *target_type
;
16746 struct attribute
*attr
;
16748 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16750 target_type
= die_type (die
, cu
);
16752 /* The die_type call above may have already set the type for this DIE. */
16753 type
= get_die_type (die
, cu
);
16757 type
= lookup_reference_type (target_type
, refcode
);
16758 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16759 if (attr
!= nullptr)
16761 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16765 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16767 maybe_set_alignment (cu
, die
, type
);
16768 return set_die_type (die
, type
, cu
);
16771 /* Add the given cv-qualifiers to the element type of the array. GCC
16772 outputs DWARF type qualifiers that apply to an array, not the
16773 element type. But GDB relies on the array element type to carry
16774 the cv-qualifiers. This mimics section 6.7.3 of the C99
16777 static struct type
*
16778 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16779 struct type
*base_type
, int cnst
, int voltl
)
16781 struct type
*el_type
, *inner_array
;
16783 base_type
= copy_type (base_type
);
16784 inner_array
= base_type
;
16786 while (TYPE_TARGET_TYPE (inner_array
)->code () == TYPE_CODE_ARRAY
)
16788 TYPE_TARGET_TYPE (inner_array
) =
16789 copy_type (TYPE_TARGET_TYPE (inner_array
));
16790 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16793 el_type
= TYPE_TARGET_TYPE (inner_array
);
16794 cnst
|= TYPE_CONST (el_type
);
16795 voltl
|= TYPE_VOLATILE (el_type
);
16796 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16798 return set_die_type (die
, base_type
, cu
);
16801 static struct type
*
16802 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16804 struct type
*base_type
, *cv_type
;
16806 base_type
= die_type (die
, cu
);
16808 /* The die_type call above may have already set the type for this DIE. */
16809 cv_type
= get_die_type (die
, cu
);
16813 /* In case the const qualifier is applied to an array type, the element type
16814 is so qualified, not the array type (section 6.7.3 of C99). */
16815 if (base_type
->code () == TYPE_CODE_ARRAY
)
16816 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16818 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16819 return set_die_type (die
, cv_type
, cu
);
16822 static struct type
*
16823 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16825 struct type
*base_type
, *cv_type
;
16827 base_type
= die_type (die
, cu
);
16829 /* The die_type call above may have already set the type for this DIE. */
16830 cv_type
= get_die_type (die
, cu
);
16834 /* In case the volatile qualifier is applied to an array type, the
16835 element type is so qualified, not the array type (section 6.7.3
16837 if (base_type
->code () == TYPE_CODE_ARRAY
)
16838 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16840 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16841 return set_die_type (die
, cv_type
, cu
);
16844 /* Handle DW_TAG_restrict_type. */
16846 static struct type
*
16847 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16849 struct type
*base_type
, *cv_type
;
16851 base_type
= die_type (die
, cu
);
16853 /* The die_type call above may have already set the type for this DIE. */
16854 cv_type
= get_die_type (die
, cu
);
16858 cv_type
= make_restrict_type (base_type
);
16859 return set_die_type (die
, cv_type
, cu
);
16862 /* Handle DW_TAG_atomic_type. */
16864 static struct type
*
16865 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16867 struct type
*base_type
, *cv_type
;
16869 base_type
= die_type (die
, cu
);
16871 /* The die_type call above may have already set the type for this DIE. */
16872 cv_type
= get_die_type (die
, cu
);
16876 cv_type
= make_atomic_type (base_type
);
16877 return set_die_type (die
, cv_type
, cu
);
16880 /* Extract all information from a DW_TAG_string_type DIE and add to
16881 the user defined type vector. It isn't really a user defined type,
16882 but it behaves like one, with other DIE's using an AT_user_def_type
16883 attribute to reference it. */
16885 static struct type
*
16886 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16888 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16889 struct gdbarch
*gdbarch
= objfile
->arch ();
16890 struct type
*type
, *range_type
, *index_type
, *char_type
;
16891 struct attribute
*attr
;
16892 struct dynamic_prop prop
;
16893 bool length_is_constant
= true;
16896 /* There are a couple of places where bit sizes might be made use of
16897 when parsing a DW_TAG_string_type, however, no producer that we know
16898 of make use of these. Handling bit sizes that are a multiple of the
16899 byte size is easy enough, but what about other bit sizes? Lets deal
16900 with that problem when we have to. Warn about these attributes being
16901 unsupported, then parse the type and ignore them like we always
16903 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
16904 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
16906 static bool warning_printed
= false;
16907 if (!warning_printed
)
16909 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
16910 "currently supported on DW_TAG_string_type."));
16911 warning_printed
= true;
16915 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
16916 if (attr
!= nullptr && !attr
->form_is_constant ())
16918 /* The string length describes the location at which the length of
16919 the string can be found. The size of the length field can be
16920 specified with one of the attributes below. */
16921 struct type
*prop_type
;
16922 struct attribute
*len
16923 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
16924 if (len
== nullptr)
16925 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16926 if (len
!= nullptr && len
->form_is_constant ())
16928 /* Pass 0 as the default as we know this attribute is constant
16929 and the default value will not be returned. */
16930 LONGEST sz
= len
->constant_value (0);
16931 prop_type
= cu
->per_cu
->int_type (sz
, true);
16935 /* If the size is not specified then we assume it is the size of
16936 an address on this target. */
16937 prop_type
= cu
->per_cu
->addr_sized_int_type (true);
16940 /* Convert the attribute into a dynamic property. */
16941 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
16944 length_is_constant
= false;
16946 else if (attr
!= nullptr)
16948 /* This DW_AT_string_length just contains the length with no
16949 indirection. There's no need to create a dynamic property in this
16950 case. Pass 0 for the default value as we know it will not be
16951 returned in this case. */
16952 length
= attr
->constant_value (0);
16954 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
16956 /* We don't currently support non-constant byte sizes for strings. */
16957 length
= attr
->constant_value (1);
16961 /* Use 1 as a fallback length if we have nothing else. */
16965 index_type
= objfile_type (objfile
)->builtin_int
;
16966 if (length_is_constant
)
16967 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
16970 struct dynamic_prop low_bound
;
16972 low_bound
.kind
= PROP_CONST
;
16973 low_bound
.data
.const_val
= 1;
16974 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
16976 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
16977 type
= create_string_type (NULL
, char_type
, range_type
);
16979 return set_die_type (die
, type
, cu
);
16982 /* Assuming that DIE corresponds to a function, returns nonzero
16983 if the function is prototyped. */
16986 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
16988 struct attribute
*attr
;
16990 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
16991 if (attr
&& (DW_UNSND (attr
) != 0))
16994 /* The DWARF standard implies that the DW_AT_prototyped attribute
16995 is only meaningful for C, but the concept also extends to other
16996 languages that allow unprototyped functions (Eg: Objective C).
16997 For all other languages, assume that functions are always
16999 if (cu
->language
!= language_c
17000 && cu
->language
!= language_objc
17001 && cu
->language
!= language_opencl
)
17004 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17005 prototyped and unprototyped functions; default to prototyped,
17006 since that is more common in modern code (and RealView warns
17007 about unprototyped functions). */
17008 if (producer_is_realview (cu
->producer
))
17014 /* Handle DIES due to C code like:
17018 int (*funcp)(int a, long l);
17022 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17024 static struct type
*
17025 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17027 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17028 struct type
*type
; /* Type that this function returns. */
17029 struct type
*ftype
; /* Function that returns above type. */
17030 struct attribute
*attr
;
17032 type
= die_type (die
, cu
);
17034 /* The die_type call above may have already set the type for this DIE. */
17035 ftype
= get_die_type (die
, cu
);
17039 ftype
= lookup_function_type (type
);
17041 if (prototyped_function_p (die
, cu
))
17042 TYPE_PROTOTYPED (ftype
) = 1;
17044 /* Store the calling convention in the type if it's available in
17045 the subroutine die. Otherwise set the calling convention to
17046 the default value DW_CC_normal. */
17047 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17048 if (attr
!= nullptr
17049 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
17050 TYPE_CALLING_CONVENTION (ftype
)
17051 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
17052 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17053 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17055 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17057 /* Record whether the function returns normally to its caller or not
17058 if the DWARF producer set that information. */
17059 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17060 if (attr
&& (DW_UNSND (attr
) != 0))
17061 TYPE_NO_RETURN (ftype
) = 1;
17063 /* We need to add the subroutine type to the die immediately so
17064 we don't infinitely recurse when dealing with parameters
17065 declared as the same subroutine type. */
17066 set_die_type (die
, ftype
, cu
);
17068 if (die
->child
!= NULL
)
17070 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17071 struct die_info
*child_die
;
17072 int nparams
, iparams
;
17074 /* Count the number of parameters.
17075 FIXME: GDB currently ignores vararg functions, but knows about
17076 vararg member functions. */
17078 child_die
= die
->child
;
17079 while (child_die
&& child_die
->tag
)
17081 if (child_die
->tag
== DW_TAG_formal_parameter
)
17083 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17084 TYPE_VARARGS (ftype
) = 1;
17085 child_die
= child_die
->sibling
;
17088 /* Allocate storage for parameters and fill them in. */
17089 ftype
->set_num_fields (nparams
);
17091 ((struct field
*) TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
)));
17093 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17094 even if we error out during the parameters reading below. */
17095 for (iparams
= 0; iparams
< nparams
; iparams
++)
17096 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17099 child_die
= die
->child
;
17100 while (child_die
&& child_die
->tag
)
17102 if (child_die
->tag
== DW_TAG_formal_parameter
)
17104 struct type
*arg_type
;
17106 /* DWARF version 2 has no clean way to discern C++
17107 static and non-static member functions. G++ helps
17108 GDB by marking the first parameter for non-static
17109 member functions (which is the this pointer) as
17110 artificial. We pass this information to
17111 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17113 DWARF version 3 added DW_AT_object_pointer, which GCC
17114 4.5 does not yet generate. */
17115 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17116 if (attr
!= nullptr)
17117 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17119 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17120 arg_type
= die_type (child_die
, cu
);
17122 /* RealView does not mark THIS as const, which the testsuite
17123 expects. GCC marks THIS as const in method definitions,
17124 but not in the class specifications (GCC PR 43053). */
17125 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17126 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17129 struct dwarf2_cu
*arg_cu
= cu
;
17130 const char *name
= dwarf2_name (child_die
, cu
);
17132 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17133 if (attr
!= nullptr)
17135 /* If the compiler emits this, use it. */
17136 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17139 else if (name
&& strcmp (name
, "this") == 0)
17140 /* Function definitions will have the argument names. */
17142 else if (name
== NULL
&& iparams
== 0)
17143 /* Declarations may not have the names, so like
17144 elsewhere in GDB, assume an artificial first
17145 argument is "this". */
17149 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17153 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17156 child_die
= child_die
->sibling
;
17163 static struct type
*
17164 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17166 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17167 const char *name
= NULL
;
17168 struct type
*this_type
, *target_type
;
17170 name
= dwarf2_full_name (NULL
, die
, cu
);
17171 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17172 TYPE_TARGET_STUB (this_type
) = 1;
17173 set_die_type (die
, this_type
, cu
);
17174 target_type
= die_type (die
, cu
);
17175 if (target_type
!= this_type
)
17176 TYPE_TARGET_TYPE (this_type
) = target_type
;
17179 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17180 spec and cause infinite loops in GDB. */
17181 complaint (_("Self-referential DW_TAG_typedef "
17182 "- DIE at %s [in module %s]"),
17183 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17184 TYPE_TARGET_TYPE (this_type
) = NULL
;
17188 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
17189 anonymous typedefs, which is, strictly speaking, invalid DWARF.
17190 Handle these by just returning the target type, rather than
17191 constructing an anonymous typedef type and trying to handle this
17193 set_die_type (die
, target_type
, cu
);
17194 return target_type
;
17199 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17200 (which may be different from NAME) to the architecture back-end to allow
17201 it to guess the correct format if necessary. */
17203 static struct type
*
17204 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17205 const char *name_hint
, enum bfd_endian byte_order
)
17207 struct gdbarch
*gdbarch
= objfile
->arch ();
17208 const struct floatformat
**format
;
17211 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17213 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
17215 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17220 /* Allocate an integer type of size BITS and name NAME. */
17222 static struct type
*
17223 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17224 int bits
, int unsigned_p
, const char *name
)
17228 /* Versions of Intel's C Compiler generate an integer type called "void"
17229 instead of using DW_TAG_unspecified_type. This has been seen on
17230 at least versions 14, 17, and 18. */
17231 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17232 && strcmp (name
, "void") == 0)
17233 type
= objfile_type (objfile
)->builtin_void
;
17235 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17240 /* Initialise and return a floating point type of size BITS suitable for
17241 use as a component of a complex number. The NAME_HINT is passed through
17242 when initialising the floating point type and is the name of the complex
17245 As DWARF doesn't currently provide an explicit name for the components
17246 of a complex number, but it can be helpful to have these components
17247 named, we try to select a suitable name based on the size of the
17249 static struct type
*
17250 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17251 struct objfile
*objfile
,
17252 int bits
, const char *name_hint
,
17253 enum bfd_endian byte_order
)
17255 gdbarch
*gdbarch
= objfile
->arch ();
17256 struct type
*tt
= nullptr;
17258 /* Try to find a suitable floating point builtin type of size BITS.
17259 We're going to use the name of this type as the name for the complex
17260 target type that we are about to create. */
17261 switch (cu
->language
)
17263 case language_fortran
:
17267 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17270 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17272 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17274 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17282 tt
= builtin_type (gdbarch
)->builtin_float
;
17285 tt
= builtin_type (gdbarch
)->builtin_double
;
17287 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17289 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17295 /* If the type we found doesn't match the size we were looking for, then
17296 pretend we didn't find a type at all, the complex target type we
17297 create will then be nameless. */
17298 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17301 const char *name
= (tt
== nullptr) ? nullptr : tt
->name ();
17302 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
17305 /* Find a representation of a given base type and install
17306 it in the TYPE field of the die. */
17308 static struct type
*
17309 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17311 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17313 struct attribute
*attr
;
17314 int encoding
= 0, bits
= 0;
17318 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17319 if (attr
!= nullptr)
17320 encoding
= DW_UNSND (attr
);
17321 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17322 if (attr
!= nullptr)
17323 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17324 name
= dwarf2_name (die
, cu
);
17326 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17328 arch
= objfile
->arch ();
17329 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
17331 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17334 int endianity
= DW_UNSND (attr
);
17339 byte_order
= BFD_ENDIAN_BIG
;
17341 case DW_END_little
:
17342 byte_order
= BFD_ENDIAN_LITTLE
;
17345 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
17352 case DW_ATE_address
:
17353 /* Turn DW_ATE_address into a void * pointer. */
17354 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17355 type
= init_pointer_type (objfile
, bits
, name
, type
);
17357 case DW_ATE_boolean
:
17358 type
= init_boolean_type (objfile
, bits
, 1, name
);
17360 case DW_ATE_complex_float
:
17361 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
17363 if (type
->code () == TYPE_CODE_ERROR
)
17365 if (name
== nullptr)
17367 struct obstack
*obstack
17368 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17369 name
= obconcat (obstack
, "_Complex ", type
->name (),
17372 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17375 type
= init_complex_type (name
, type
);
17377 case DW_ATE_decimal_float
:
17378 type
= init_decfloat_type (objfile
, bits
, name
);
17381 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
17383 case DW_ATE_signed
:
17384 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17386 case DW_ATE_unsigned
:
17387 if (cu
->language
== language_fortran
17389 && startswith (name
, "character("))
17390 type
= init_character_type (objfile
, bits
, 1, name
);
17392 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17394 case DW_ATE_signed_char
:
17395 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17396 || cu
->language
== language_pascal
17397 || cu
->language
== language_fortran
)
17398 type
= init_character_type (objfile
, bits
, 0, name
);
17400 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17402 case DW_ATE_unsigned_char
:
17403 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17404 || cu
->language
== language_pascal
17405 || cu
->language
== language_fortran
17406 || cu
->language
== language_rust
)
17407 type
= init_character_type (objfile
, bits
, 1, name
);
17409 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17414 type
= builtin_type (arch
)->builtin_char16
;
17415 else if (bits
== 32)
17416 type
= builtin_type (arch
)->builtin_char32
;
17419 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17421 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17423 return set_die_type (die
, type
, cu
);
17428 complaint (_("unsupported DW_AT_encoding: '%s'"),
17429 dwarf_type_encoding_name (encoding
));
17430 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17434 if (name
&& strcmp (name
, "char") == 0)
17435 TYPE_NOSIGN (type
) = 1;
17437 maybe_set_alignment (cu
, die
, type
);
17439 TYPE_ENDIANITY_NOT_DEFAULT (type
) = gdbarch_byte_order (arch
) != byte_order
;
17441 return set_die_type (die
, type
, cu
);
17444 /* Parse dwarf attribute if it's a block, reference or constant and put the
17445 resulting value of the attribute into struct bound_prop.
17446 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17449 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17450 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17451 struct type
*default_type
)
17453 struct dwarf2_property_baton
*baton
;
17454 dwarf2_per_objfile
*per_objfile
= cu
->per_cu
->dwarf2_per_objfile
;
17455 struct objfile
*objfile
= per_objfile
->objfile
;
17456 struct obstack
*obstack
= &objfile
->objfile_obstack
;
17458 gdb_assert (default_type
!= NULL
);
17460 if (attr
== NULL
|| prop
== NULL
)
17463 if (attr
->form_is_block ())
17465 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17466 baton
->property_type
= default_type
;
17467 baton
->locexpr
.per_cu
= cu
->per_cu
;
17468 baton
->locexpr
.per_objfile
= per_objfile
;
17469 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17470 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17471 switch (attr
->name
)
17473 case DW_AT_string_length
:
17474 baton
->locexpr
.is_reference
= true;
17477 baton
->locexpr
.is_reference
= false;
17480 prop
->data
.baton
= baton
;
17481 prop
->kind
= PROP_LOCEXPR
;
17482 gdb_assert (prop
->data
.baton
!= NULL
);
17484 else if (attr
->form_is_ref ())
17486 struct dwarf2_cu
*target_cu
= cu
;
17487 struct die_info
*target_die
;
17488 struct attribute
*target_attr
;
17490 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17491 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17492 if (target_attr
== NULL
)
17493 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17495 if (target_attr
== NULL
)
17498 switch (target_attr
->name
)
17500 case DW_AT_location
:
17501 if (target_attr
->form_is_section_offset ())
17503 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17504 baton
->property_type
= die_type (target_die
, target_cu
);
17505 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17506 prop
->data
.baton
= baton
;
17507 prop
->kind
= PROP_LOCLIST
;
17508 gdb_assert (prop
->data
.baton
!= NULL
);
17510 else if (target_attr
->form_is_block ())
17512 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17513 baton
->property_type
= die_type (target_die
, target_cu
);
17514 baton
->locexpr
.per_cu
= cu
->per_cu
;
17515 baton
->locexpr
.per_objfile
= per_objfile
;
17516 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17517 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17518 baton
->locexpr
.is_reference
= true;
17519 prop
->data
.baton
= baton
;
17520 prop
->kind
= PROP_LOCEXPR
;
17521 gdb_assert (prop
->data
.baton
!= NULL
);
17525 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17526 "dynamic property");
17530 case DW_AT_data_member_location
:
17534 if (!handle_data_member_location (target_die
, target_cu
,
17538 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17539 baton
->property_type
= read_type_die (target_die
->parent
,
17541 baton
->offset_info
.offset
= offset
;
17542 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17543 prop
->data
.baton
= baton
;
17544 prop
->kind
= PROP_ADDR_OFFSET
;
17549 else if (attr
->form_is_constant ())
17551 prop
->data
.const_val
= attr
->constant_value (0);
17552 prop
->kind
= PROP_CONST
;
17556 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17557 dwarf2_name (die
, cu
));
17567 dwarf2_per_cu_data::int_type (int size_in_bytes
, bool unsigned_p
) const
17569 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17570 struct type
*int_type
;
17572 /* Helper macro to examine the various builtin types. */
17573 #define TRY_TYPE(F) \
17574 int_type = (unsigned_p \
17575 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17576 : objfile_type (objfile)->builtin_ ## F); \
17577 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
17584 TRY_TYPE (long_long
);
17588 gdb_assert_not_reached ("unable to find suitable integer type");
17594 dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p
) const
17596 int addr_size
= this->addr_size ();
17597 return int_type (addr_size
, unsigned_p
);
17600 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17601 present (which is valid) then compute the default type based on the
17602 compilation units address size. */
17604 static struct type
*
17605 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17607 struct type
*index_type
= die_type (die
, cu
);
17609 /* Dwarf-2 specifications explicitly allows to create subrange types
17610 without specifying a base type.
17611 In that case, the base type must be set to the type of
17612 the lower bound, upper bound or count, in that order, if any of these
17613 three attributes references an object that has a type.
17614 If no base type is found, the Dwarf-2 specifications say that
17615 a signed integer type of size equal to the size of an address should
17617 For the following C code: `extern char gdb_int [];'
17618 GCC produces an empty range DIE.
17619 FIXME: muller/2010-05-28: Possible references to object for low bound,
17620 high bound or count are not yet handled by this code. */
17621 if (index_type
->code () == TYPE_CODE_VOID
)
17622 index_type
= cu
->per_cu
->addr_sized_int_type (false);
17627 /* Read the given DW_AT_subrange DIE. */
17629 static struct type
*
17630 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17632 struct type
*base_type
, *orig_base_type
;
17633 struct type
*range_type
;
17634 struct attribute
*attr
;
17635 struct dynamic_prop low
, high
;
17636 int low_default_is_valid
;
17637 int high_bound_is_count
= 0;
17639 ULONGEST negative_mask
;
17641 orig_base_type
= read_subrange_index_type (die
, cu
);
17643 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17644 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17645 creating the range type, but we use the result of check_typedef
17646 when examining properties of the type. */
17647 base_type
= check_typedef (orig_base_type
);
17649 /* The die_type call above may have already set the type for this DIE. */
17650 range_type
= get_die_type (die
, cu
);
17654 low
.kind
= PROP_CONST
;
17655 high
.kind
= PROP_CONST
;
17656 high
.data
.const_val
= 0;
17658 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17659 omitting DW_AT_lower_bound. */
17660 switch (cu
->language
)
17663 case language_cplus
:
17664 low
.data
.const_val
= 0;
17665 low_default_is_valid
= 1;
17667 case language_fortran
:
17668 low
.data
.const_val
= 1;
17669 low_default_is_valid
= 1;
17672 case language_objc
:
17673 case language_rust
:
17674 low
.data
.const_val
= 0;
17675 low_default_is_valid
= (cu
->header
.version
>= 4);
17679 case language_pascal
:
17680 low
.data
.const_val
= 1;
17681 low_default_is_valid
= (cu
->header
.version
>= 4);
17684 low
.data
.const_val
= 0;
17685 low_default_is_valid
= 0;
17689 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17690 if (attr
!= nullptr)
17691 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17692 else if (!low_default_is_valid
)
17693 complaint (_("Missing DW_AT_lower_bound "
17694 "- DIE at %s [in module %s]"),
17695 sect_offset_str (die
->sect_off
),
17696 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17698 struct attribute
*attr_ub
, *attr_count
;
17699 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17700 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17702 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17703 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17705 /* If bounds are constant do the final calculation here. */
17706 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17707 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17709 high_bound_is_count
= 1;
17713 if (attr_ub
!= NULL
)
17714 complaint (_("Unresolved DW_AT_upper_bound "
17715 "- DIE at %s [in module %s]"),
17716 sect_offset_str (die
->sect_off
),
17717 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17718 if (attr_count
!= NULL
)
17719 complaint (_("Unresolved DW_AT_count "
17720 "- DIE at %s [in module %s]"),
17721 sect_offset_str (die
->sect_off
),
17722 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17727 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17728 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
17729 bias
= bias_attr
->constant_value (0);
17731 /* Normally, the DWARF producers are expected to use a signed
17732 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17733 But this is unfortunately not always the case, as witnessed
17734 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17735 is used instead. To work around that ambiguity, we treat
17736 the bounds as signed, and thus sign-extend their values, when
17737 the base type is signed. */
17739 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17740 if (low
.kind
== PROP_CONST
17741 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17742 low
.data
.const_val
|= negative_mask
;
17743 if (high
.kind
== PROP_CONST
17744 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17745 high
.data
.const_val
|= negative_mask
;
17747 /* Check for bit and byte strides. */
17748 struct dynamic_prop byte_stride_prop
;
17749 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17750 if (attr_byte_stride
!= nullptr)
17752 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17753 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
17757 struct dynamic_prop bit_stride_prop
;
17758 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17759 if (attr_bit_stride
!= nullptr)
17761 /* It only makes sense to have either a bit or byte stride. */
17762 if (attr_byte_stride
!= nullptr)
17764 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
17765 "- DIE at %s [in module %s]"),
17766 sect_offset_str (die
->sect_off
),
17767 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17768 attr_bit_stride
= nullptr;
17772 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17773 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
17778 if (attr_byte_stride
!= nullptr
17779 || attr_bit_stride
!= nullptr)
17781 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
17782 struct dynamic_prop
*stride
17783 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
17786 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
17787 &high
, bias
, stride
, byte_stride_p
);
17790 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
17792 if (high_bound_is_count
)
17793 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17795 /* Ada expects an empty array on no boundary attributes. */
17796 if (attr
== NULL
&& cu
->language
!= language_ada
)
17797 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17799 name
= dwarf2_name (die
, cu
);
17801 range_type
->set_name (name
);
17803 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17804 if (attr
!= nullptr)
17805 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17807 maybe_set_alignment (cu
, die
, range_type
);
17809 set_die_type (die
, range_type
, cu
);
17811 /* set_die_type should be already done. */
17812 set_descriptive_type (range_type
, die
, cu
);
17817 static struct type
*
17818 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17822 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17824 type
->set_name (dwarf2_name (die
, cu
));
17826 /* In Ada, an unspecified type is typically used when the description
17827 of the type is deferred to a different unit. When encountering
17828 such a type, we treat it as a stub, and try to resolve it later on,
17830 if (cu
->language
== language_ada
)
17831 TYPE_STUB (type
) = 1;
17833 return set_die_type (die
, type
, cu
);
17836 /* Read a single die and all its descendents. Set the die's sibling
17837 field to NULL; set other fields in the die correctly, and set all
17838 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17839 location of the info_ptr after reading all of those dies. PARENT
17840 is the parent of the die in question. */
17842 static struct die_info
*
17843 read_die_and_children (const struct die_reader_specs
*reader
,
17844 const gdb_byte
*info_ptr
,
17845 const gdb_byte
**new_info_ptr
,
17846 struct die_info
*parent
)
17848 struct die_info
*die
;
17849 const gdb_byte
*cur_ptr
;
17851 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
17854 *new_info_ptr
= cur_ptr
;
17857 store_in_ref_table (die
, reader
->cu
);
17859 if (die
->has_children
)
17860 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17864 *new_info_ptr
= cur_ptr
;
17867 die
->sibling
= NULL
;
17868 die
->parent
= parent
;
17872 /* Read a die, all of its descendents, and all of its siblings; set
17873 all of the fields of all of the dies correctly. Arguments are as
17874 in read_die_and_children. */
17876 static struct die_info
*
17877 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17878 const gdb_byte
*info_ptr
,
17879 const gdb_byte
**new_info_ptr
,
17880 struct die_info
*parent
)
17882 struct die_info
*first_die
, *last_sibling
;
17883 const gdb_byte
*cur_ptr
;
17885 cur_ptr
= info_ptr
;
17886 first_die
= last_sibling
= NULL
;
17890 struct die_info
*die
17891 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17895 *new_info_ptr
= cur_ptr
;
17902 last_sibling
->sibling
= die
;
17904 last_sibling
= die
;
17908 /* Read a die, all of its descendents, and all of its siblings; set
17909 all of the fields of all of the dies correctly. Arguments are as
17910 in read_die_and_children.
17911 This the main entry point for reading a DIE and all its children. */
17913 static struct die_info
*
17914 read_die_and_siblings (const struct die_reader_specs
*reader
,
17915 const gdb_byte
*info_ptr
,
17916 const gdb_byte
**new_info_ptr
,
17917 struct die_info
*parent
)
17919 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17920 new_info_ptr
, parent
);
17922 if (dwarf_die_debug
)
17924 fprintf_unfiltered (gdb_stdlog
,
17925 "Read die from %s@0x%x of %s:\n",
17926 reader
->die_section
->get_name (),
17927 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17928 bfd_get_filename (reader
->abfd
));
17929 dump_die (die
, dwarf_die_debug
);
17935 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17937 The caller is responsible for filling in the extra attributes
17938 and updating (*DIEP)->num_attrs.
17939 Set DIEP to point to a newly allocated die with its information,
17940 except for its child, sibling, and parent fields. */
17942 static const gdb_byte
*
17943 read_full_die_1 (const struct die_reader_specs
*reader
,
17944 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17945 int num_extra_attrs
)
17947 unsigned int abbrev_number
, bytes_read
, i
;
17948 struct abbrev_info
*abbrev
;
17949 struct die_info
*die
;
17950 struct dwarf2_cu
*cu
= reader
->cu
;
17951 bfd
*abfd
= reader
->abfd
;
17953 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17954 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17955 info_ptr
+= bytes_read
;
17956 if (!abbrev_number
)
17962 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17964 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17966 bfd_get_filename (abfd
));
17968 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17969 die
->sect_off
= sect_off
;
17970 die
->tag
= abbrev
->tag
;
17971 die
->abbrev
= abbrev_number
;
17972 die
->has_children
= abbrev
->has_children
;
17974 /* Make the result usable.
17975 The caller needs to update num_attrs after adding the extra
17977 die
->num_attrs
= abbrev
->num_attrs
;
17979 std::vector
<int> indexes_that_need_reprocess
;
17980 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17982 bool need_reprocess
;
17984 read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17985 info_ptr
, &need_reprocess
);
17986 if (need_reprocess
)
17987 indexes_that_need_reprocess
.push_back (i
);
17990 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
17991 if (attr
!= nullptr)
17992 cu
->str_offsets_base
= DW_UNSND (attr
);
17994 attr
= die
->attr (DW_AT_loclists_base
);
17995 if (attr
!= nullptr)
17996 cu
->loclist_base
= DW_UNSND (attr
);
17998 auto maybe_addr_base
= die
->addr_base ();
17999 if (maybe_addr_base
.has_value ())
18000 cu
->addr_base
= *maybe_addr_base
;
18001 for (int index
: indexes_that_need_reprocess
)
18002 read_attribute_reprocess (reader
, &die
->attrs
[index
]);
18007 /* Read a die and all its attributes.
18008 Set DIEP to point to a newly allocated die with its information,
18009 except for its child, sibling, and parent fields. */
18011 static const gdb_byte
*
18012 read_full_die (const struct die_reader_specs
*reader
,
18013 struct die_info
**diep
, const gdb_byte
*info_ptr
)
18015 const gdb_byte
*result
;
18017 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
18019 if (dwarf_die_debug
)
18021 fprintf_unfiltered (gdb_stdlog
,
18022 "Read die from %s@0x%x of %s:\n",
18023 reader
->die_section
->get_name (),
18024 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18025 bfd_get_filename (reader
->abfd
));
18026 dump_die (*diep
, dwarf_die_debug
);
18033 /* Returns nonzero if TAG represents a type that we might generate a partial
18037 is_type_tag_for_partial (int tag
)
18042 /* Some types that would be reasonable to generate partial symbols for,
18043 that we don't at present. */
18044 case DW_TAG_array_type
:
18045 case DW_TAG_file_type
:
18046 case DW_TAG_ptr_to_member_type
:
18047 case DW_TAG_set_type
:
18048 case DW_TAG_string_type
:
18049 case DW_TAG_subroutine_type
:
18051 case DW_TAG_base_type
:
18052 case DW_TAG_class_type
:
18053 case DW_TAG_interface_type
:
18054 case DW_TAG_enumeration_type
:
18055 case DW_TAG_structure_type
:
18056 case DW_TAG_subrange_type
:
18057 case DW_TAG_typedef
:
18058 case DW_TAG_union_type
:
18065 /* Load all DIEs that are interesting for partial symbols into memory. */
18067 static struct partial_die_info
*
18068 load_partial_dies (const struct die_reader_specs
*reader
,
18069 const gdb_byte
*info_ptr
, int building_psymtab
)
18071 struct dwarf2_cu
*cu
= reader
->cu
;
18072 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18073 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18074 unsigned int bytes_read
;
18075 unsigned int load_all
= 0;
18076 int nesting_level
= 1;
18081 gdb_assert (cu
->per_cu
!= NULL
);
18082 if (cu
->per_cu
->load_all_dies
)
18086 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18090 &cu
->comp_unit_obstack
,
18091 hashtab_obstack_allocate
,
18092 dummy_obstack_deallocate
);
18096 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18098 /* A NULL abbrev means the end of a series of children. */
18099 if (abbrev
== NULL
)
18101 if (--nesting_level
== 0)
18104 info_ptr
+= bytes_read
;
18105 last_die
= parent_die
;
18106 parent_die
= parent_die
->die_parent
;
18110 /* Check for template arguments. We never save these; if
18111 they're seen, we just mark the parent, and go on our way. */
18112 if (parent_die
!= NULL
18113 && cu
->language
== language_cplus
18114 && (abbrev
->tag
== DW_TAG_template_type_param
18115 || abbrev
->tag
== DW_TAG_template_value_param
))
18117 parent_die
->has_template_arguments
= 1;
18121 /* We don't need a partial DIE for the template argument. */
18122 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18127 /* We only recurse into c++ subprograms looking for template arguments.
18128 Skip their other children. */
18130 && cu
->language
== language_cplus
18131 && parent_die
!= NULL
18132 && parent_die
->tag
== DW_TAG_subprogram
)
18134 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18138 /* Check whether this DIE is interesting enough to save. Normally
18139 we would not be interested in members here, but there may be
18140 later variables referencing them via DW_AT_specification (for
18141 static members). */
18143 && !is_type_tag_for_partial (abbrev
->tag
)
18144 && abbrev
->tag
!= DW_TAG_constant
18145 && abbrev
->tag
!= DW_TAG_enumerator
18146 && abbrev
->tag
!= DW_TAG_subprogram
18147 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18148 && abbrev
->tag
!= DW_TAG_lexical_block
18149 && abbrev
->tag
!= DW_TAG_variable
18150 && abbrev
->tag
!= DW_TAG_namespace
18151 && abbrev
->tag
!= DW_TAG_module
18152 && abbrev
->tag
!= DW_TAG_member
18153 && abbrev
->tag
!= DW_TAG_imported_unit
18154 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18156 /* Otherwise we skip to the next sibling, if any. */
18157 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18161 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18164 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18166 /* This two-pass algorithm for processing partial symbols has a
18167 high cost in cache pressure. Thus, handle some simple cases
18168 here which cover the majority of C partial symbols. DIEs
18169 which neither have specification tags in them, nor could have
18170 specification tags elsewhere pointing at them, can simply be
18171 processed and discarded.
18173 This segment is also optional; scan_partial_symbols and
18174 add_partial_symbol will handle these DIEs if we chain
18175 them in normally. When compilers which do not emit large
18176 quantities of duplicate debug information are more common,
18177 this code can probably be removed. */
18179 /* Any complete simple types at the top level (pretty much all
18180 of them, for a language without namespaces), can be processed
18182 if (parent_die
== NULL
18183 && pdi
.has_specification
== 0
18184 && pdi
.is_declaration
== 0
18185 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18186 || pdi
.tag
== DW_TAG_base_type
18187 || pdi
.tag
== DW_TAG_subrange_type
))
18189 if (building_psymtab
&& pdi
.name
!= NULL
)
18190 add_psymbol_to_list (pdi
.name
, false,
18191 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18192 psymbol_placement::STATIC
,
18193 0, cu
->language
, objfile
);
18194 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18198 /* The exception for DW_TAG_typedef with has_children above is
18199 a workaround of GCC PR debug/47510. In the case of this complaint
18200 type_name_or_error will error on such types later.
18202 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18203 it could not find the child DIEs referenced later, this is checked
18204 above. In correct DWARF DW_TAG_typedef should have no children. */
18206 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18207 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18208 "- DIE at %s [in module %s]"),
18209 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18211 /* If we're at the second level, and we're an enumerator, and
18212 our parent has no specification (meaning possibly lives in a
18213 namespace elsewhere), then we can add the partial symbol now
18214 instead of queueing it. */
18215 if (pdi
.tag
== DW_TAG_enumerator
18216 && parent_die
!= NULL
18217 && parent_die
->die_parent
== NULL
18218 && parent_die
->tag
== DW_TAG_enumeration_type
18219 && parent_die
->has_specification
== 0)
18221 if (pdi
.name
== NULL
)
18222 complaint (_("malformed enumerator DIE ignored"));
18223 else if (building_psymtab
)
18224 add_psymbol_to_list (pdi
.name
, false,
18225 VAR_DOMAIN
, LOC_CONST
, -1,
18226 cu
->language
== language_cplus
18227 ? psymbol_placement::GLOBAL
18228 : psymbol_placement::STATIC
,
18229 0, cu
->language
, objfile
);
18231 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18235 struct partial_die_info
*part_die
18236 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18238 /* We'll save this DIE so link it in. */
18239 part_die
->die_parent
= parent_die
;
18240 part_die
->die_sibling
= NULL
;
18241 part_die
->die_child
= NULL
;
18243 if (last_die
&& last_die
== parent_die
)
18244 last_die
->die_child
= part_die
;
18246 last_die
->die_sibling
= part_die
;
18248 last_die
= part_die
;
18250 if (first_die
== NULL
)
18251 first_die
= part_die
;
18253 /* Maybe add the DIE to the hash table. Not all DIEs that we
18254 find interesting need to be in the hash table, because we
18255 also have the parent/sibling/child chains; only those that we
18256 might refer to by offset later during partial symbol reading.
18258 For now this means things that might have be the target of a
18259 DW_AT_specification, DW_AT_abstract_origin, or
18260 DW_AT_extension. DW_AT_extension will refer only to
18261 namespaces; DW_AT_abstract_origin refers to functions (and
18262 many things under the function DIE, but we do not recurse
18263 into function DIEs during partial symbol reading) and
18264 possibly variables as well; DW_AT_specification refers to
18265 declarations. Declarations ought to have the DW_AT_declaration
18266 flag. It happens that GCC forgets to put it in sometimes, but
18267 only for functions, not for types.
18269 Adding more things than necessary to the hash table is harmless
18270 except for the performance cost. Adding too few will result in
18271 wasted time in find_partial_die, when we reread the compilation
18272 unit with load_all_dies set. */
18275 || abbrev
->tag
== DW_TAG_constant
18276 || abbrev
->tag
== DW_TAG_subprogram
18277 || abbrev
->tag
== DW_TAG_variable
18278 || abbrev
->tag
== DW_TAG_namespace
18279 || part_die
->is_declaration
)
18283 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18284 to_underlying (part_die
->sect_off
),
18289 /* For some DIEs we want to follow their children (if any). For C
18290 we have no reason to follow the children of structures; for other
18291 languages we have to, so that we can get at method physnames
18292 to infer fully qualified class names, for DW_AT_specification,
18293 and for C++ template arguments. For C++, we also look one level
18294 inside functions to find template arguments (if the name of the
18295 function does not already contain the template arguments).
18297 For Ada and Fortran, we need to scan the children of subprograms
18298 and lexical blocks as well because these languages allow the
18299 definition of nested entities that could be interesting for the
18300 debugger, such as nested subprograms for instance. */
18301 if (last_die
->has_children
18303 || last_die
->tag
== DW_TAG_namespace
18304 || last_die
->tag
== DW_TAG_module
18305 || last_die
->tag
== DW_TAG_enumeration_type
18306 || (cu
->language
== language_cplus
18307 && last_die
->tag
== DW_TAG_subprogram
18308 && (last_die
->name
== NULL
18309 || strchr (last_die
->name
, '<') == NULL
))
18310 || (cu
->language
!= language_c
18311 && (last_die
->tag
== DW_TAG_class_type
18312 || last_die
->tag
== DW_TAG_interface_type
18313 || last_die
->tag
== DW_TAG_structure_type
18314 || last_die
->tag
== DW_TAG_union_type
))
18315 || ((cu
->language
== language_ada
18316 || cu
->language
== language_fortran
)
18317 && (last_die
->tag
== DW_TAG_subprogram
18318 || last_die
->tag
== DW_TAG_lexical_block
))))
18321 parent_die
= last_die
;
18325 /* Otherwise we skip to the next sibling, if any. */
18326 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18328 /* Back to the top, do it again. */
18332 partial_die_info::partial_die_info (sect_offset sect_off_
,
18333 struct abbrev_info
*abbrev
)
18334 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18338 /* Read a minimal amount of information into the minimal die structure.
18339 INFO_PTR should point just after the initial uleb128 of a DIE. */
18342 partial_die_info::read (const struct die_reader_specs
*reader
,
18343 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18345 struct dwarf2_cu
*cu
= reader
->cu
;
18346 struct dwarf2_per_objfile
*dwarf2_per_objfile
18347 = cu
->per_cu
->dwarf2_per_objfile
;
18349 int has_low_pc_attr
= 0;
18350 int has_high_pc_attr
= 0;
18351 int high_pc_relative
= 0;
18353 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18356 bool need_reprocess
;
18357 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
],
18358 info_ptr
, &need_reprocess
);
18359 /* String and address offsets that need to do the reprocessing have
18360 already been read at this point, so there is no need to wait until
18361 the loop terminates to do the reprocessing. */
18362 if (need_reprocess
)
18363 read_attribute_reprocess (reader
, &attr
);
18364 /* Store the data if it is of an attribute we want to keep in a
18365 partial symbol table. */
18371 case DW_TAG_compile_unit
:
18372 case DW_TAG_partial_unit
:
18373 case DW_TAG_type_unit
:
18374 /* Compilation units have a DW_AT_name that is a filename, not
18375 a source language identifier. */
18376 case DW_TAG_enumeration_type
:
18377 case DW_TAG_enumerator
:
18378 /* These tags always have simple identifiers already; no need
18379 to canonicalize them. */
18380 name
= DW_STRING (&attr
);
18384 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18387 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
, objfile
);
18392 case DW_AT_linkage_name
:
18393 case DW_AT_MIPS_linkage_name
:
18394 /* Note that both forms of linkage name might appear. We
18395 assume they will be the same, and we only store the last
18397 linkage_name
= attr
.value_as_string ();
18398 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
18399 See https://github.com/rust-lang/rust/issues/32925. */
18400 if (cu
->language
== language_rust
&& linkage_name
!= NULL
18401 && strchr (linkage_name
, '{') != NULL
)
18402 linkage_name
= NULL
;
18405 has_low_pc_attr
= 1;
18406 lowpc
= attr
.value_as_address ();
18408 case DW_AT_high_pc
:
18409 has_high_pc_attr
= 1;
18410 highpc
= attr
.value_as_address ();
18411 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
18412 high_pc_relative
= 1;
18414 case DW_AT_location
:
18415 /* Support the .debug_loc offsets. */
18416 if (attr
.form_is_block ())
18418 d
.locdesc
= DW_BLOCK (&attr
);
18420 else if (attr
.form_is_section_offset ())
18422 dwarf2_complex_location_expr_complaint ();
18426 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18427 "partial symbol information");
18430 case DW_AT_external
:
18431 is_external
= DW_UNSND (&attr
);
18433 case DW_AT_declaration
:
18434 is_declaration
= DW_UNSND (&attr
);
18439 case DW_AT_abstract_origin
:
18440 case DW_AT_specification
:
18441 case DW_AT_extension
:
18442 has_specification
= 1;
18443 spec_offset
= attr
.get_ref_die_offset ();
18444 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18445 || cu
->per_cu
->is_dwz
);
18447 case DW_AT_sibling
:
18448 /* Ignore absolute siblings, they might point outside of
18449 the current compile unit. */
18450 if (attr
.form
== DW_FORM_ref_addr
)
18451 complaint (_("ignoring absolute DW_AT_sibling"));
18454 const gdb_byte
*buffer
= reader
->buffer
;
18455 sect_offset off
= attr
.get_ref_die_offset ();
18456 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18458 if (sibling_ptr
< info_ptr
)
18459 complaint (_("DW_AT_sibling points backwards"));
18460 else if (sibling_ptr
> reader
->buffer_end
)
18461 reader
->die_section
->overflow_complaint ();
18463 sibling
= sibling_ptr
;
18466 case DW_AT_byte_size
:
18469 case DW_AT_const_value
:
18470 has_const_value
= 1;
18472 case DW_AT_calling_convention
:
18473 /* DWARF doesn't provide a way to identify a program's source-level
18474 entry point. DW_AT_calling_convention attributes are only meant
18475 to describe functions' calling conventions.
18477 However, because it's a necessary piece of information in
18478 Fortran, and before DWARF 4 DW_CC_program was the only
18479 piece of debugging information whose definition refers to
18480 a 'main program' at all, several compilers marked Fortran
18481 main programs with DW_CC_program --- even when those
18482 functions use the standard calling conventions.
18484 Although DWARF now specifies a way to provide this
18485 information, we support this practice for backward
18487 if (DW_UNSND (&attr
) == DW_CC_program
18488 && cu
->language
== language_fortran
)
18489 main_subprogram
= 1;
18492 if (DW_UNSND (&attr
) == DW_INL_inlined
18493 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18494 may_be_inlined
= 1;
18498 if (tag
== DW_TAG_imported_unit
)
18500 d
.sect_off
= attr
.get_ref_die_offset ();
18501 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18502 || cu
->per_cu
->is_dwz
);
18506 case DW_AT_main_subprogram
:
18507 main_subprogram
= DW_UNSND (&attr
);
18512 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18513 but that requires a full DIE, so instead we just
18515 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18516 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18517 + (need_ranges_base
18521 /* Value of the DW_AT_ranges attribute is the offset in the
18522 .debug_ranges section. */
18523 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18534 /* For Ada, if both the name and the linkage name appear, we prefer
18535 the latter. This lets "catch exception" work better, regardless
18536 of the order in which the name and linkage name were emitted.
18537 Really, though, this is just a workaround for the fact that gdb
18538 doesn't store both the name and the linkage name. */
18539 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18540 name
= linkage_name
;
18542 if (high_pc_relative
)
18545 if (has_low_pc_attr
&& has_high_pc_attr
)
18547 /* When using the GNU linker, .gnu.linkonce. sections are used to
18548 eliminate duplicate copies of functions and vtables and such.
18549 The linker will arbitrarily choose one and discard the others.
18550 The AT_*_pc values for such functions refer to local labels in
18551 these sections. If the section from that file was discarded, the
18552 labels are not in the output, so the relocs get a value of 0.
18553 If this is a discarded function, mark the pc bounds as invalid,
18554 so that GDB will ignore it. */
18555 if (lowpc
== 0 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
18557 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18558 struct gdbarch
*gdbarch
= objfile
->arch ();
18560 complaint (_("DW_AT_low_pc %s is zero "
18561 "for DIE at %s [in module %s]"),
18562 paddress (gdbarch
, lowpc
),
18563 sect_offset_str (sect_off
),
18564 objfile_name (objfile
));
18566 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18567 else if (lowpc
>= highpc
)
18569 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18570 struct gdbarch
*gdbarch
= objfile
->arch ();
18572 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18573 "for DIE at %s [in module %s]"),
18574 paddress (gdbarch
, lowpc
),
18575 paddress (gdbarch
, highpc
),
18576 sect_offset_str (sect_off
),
18577 objfile_name (objfile
));
18586 /* Find a cached partial DIE at OFFSET in CU. */
18588 struct partial_die_info
*
18589 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18591 struct partial_die_info
*lookup_die
= NULL
;
18592 struct partial_die_info
part_die (sect_off
);
18594 lookup_die
= ((struct partial_die_info
*)
18595 htab_find_with_hash (partial_dies
, &part_die
,
18596 to_underlying (sect_off
)));
18601 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18602 except in the case of .debug_types DIEs which do not reference
18603 outside their CU (they do however referencing other types via
18604 DW_FORM_ref_sig8). */
18606 static const struct cu_partial_die_info
18607 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18609 struct dwarf2_per_objfile
*dwarf2_per_objfile
18610 = cu
->per_cu
->dwarf2_per_objfile
;
18611 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18612 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18613 struct partial_die_info
*pd
= NULL
;
18615 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18616 && cu
->header
.offset_in_cu_p (sect_off
))
18618 pd
= cu
->find_partial_die (sect_off
);
18621 /* We missed recording what we needed.
18622 Load all dies and try again. */
18623 per_cu
= cu
->per_cu
;
18627 /* TUs don't reference other CUs/TUs (except via type signatures). */
18628 if (cu
->per_cu
->is_debug_types
)
18630 error (_("Dwarf Error: Type Unit at offset %s contains"
18631 " external reference to offset %s [in module %s].\n"),
18632 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18633 bfd_get_filename (objfile
->obfd
));
18635 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18636 dwarf2_per_objfile
);
18638 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18639 load_partial_comp_unit (per_cu
);
18641 per_cu
->cu
->last_used
= 0;
18642 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18645 /* If we didn't find it, and not all dies have been loaded,
18646 load them all and try again. */
18648 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18650 per_cu
->load_all_dies
= 1;
18652 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18653 THIS_CU->cu may already be in use. So we can't just free it and
18654 replace its DIEs with the ones we read in. Instead, we leave those
18655 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18656 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18658 load_partial_comp_unit (per_cu
);
18660 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18664 internal_error (__FILE__
, __LINE__
,
18665 _("could not find partial DIE %s "
18666 "in cache [from module %s]\n"),
18667 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18668 return { per_cu
->cu
, pd
};
18671 /* See if we can figure out if the class lives in a namespace. We do
18672 this by looking for a member function; its demangled name will
18673 contain namespace info, if there is any. */
18676 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18677 struct dwarf2_cu
*cu
)
18679 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18680 what template types look like, because the demangler
18681 frequently doesn't give the same name as the debug info. We
18682 could fix this by only using the demangled name to get the
18683 prefix (but see comment in read_structure_type). */
18685 struct partial_die_info
*real_pdi
;
18686 struct partial_die_info
*child_pdi
;
18688 /* If this DIE (this DIE's specification, if any) has a parent, then
18689 we should not do this. We'll prepend the parent's fully qualified
18690 name when we create the partial symbol. */
18692 real_pdi
= struct_pdi
;
18693 while (real_pdi
->has_specification
)
18695 auto res
= find_partial_die (real_pdi
->spec_offset
,
18696 real_pdi
->spec_is_dwz
, cu
);
18697 real_pdi
= res
.pdi
;
18701 if (real_pdi
->die_parent
!= NULL
)
18704 for (child_pdi
= struct_pdi
->die_child
;
18706 child_pdi
= child_pdi
->die_sibling
)
18708 if (child_pdi
->tag
== DW_TAG_subprogram
18709 && child_pdi
->linkage_name
!= NULL
)
18711 gdb::unique_xmalloc_ptr
<char> actual_class_name
18712 (language_class_name_from_physname (cu
->language_defn
,
18713 child_pdi
->linkage_name
));
18714 if (actual_class_name
!= NULL
)
18716 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18717 struct_pdi
->name
= objfile
->intern (actual_class_name
.get ());
18724 /* Return true if a DIE with TAG may have the DW_AT_const_value
18728 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
18732 case DW_TAG_constant
:
18733 case DW_TAG_enumerator
:
18734 case DW_TAG_formal_parameter
:
18735 case DW_TAG_template_value_param
:
18736 case DW_TAG_variable
:
18744 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18746 /* Once we've fixed up a die, there's no point in doing so again.
18747 This also avoids a memory leak if we were to call
18748 guess_partial_die_structure_name multiple times. */
18752 /* If we found a reference attribute and the DIE has no name, try
18753 to find a name in the referred to DIE. */
18755 if (name
== NULL
&& has_specification
)
18757 struct partial_die_info
*spec_die
;
18759 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18760 spec_die
= res
.pdi
;
18763 spec_die
->fixup (cu
);
18765 if (spec_die
->name
)
18767 name
= spec_die
->name
;
18769 /* Copy DW_AT_external attribute if it is set. */
18770 if (spec_die
->is_external
)
18771 is_external
= spec_die
->is_external
;
18775 if (!has_const_value
&& has_specification
18776 && can_have_DW_AT_const_value_p (tag
))
18778 struct partial_die_info
*spec_die
;
18780 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18781 spec_die
= res
.pdi
;
18784 spec_die
->fixup (cu
);
18786 if (spec_die
->has_const_value
)
18788 /* Copy DW_AT_const_value attribute if it is set. */
18789 has_const_value
= spec_die
->has_const_value
;
18793 /* Set default names for some unnamed DIEs. */
18795 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18796 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18798 /* If there is no parent die to provide a namespace, and there are
18799 children, see if we can determine the namespace from their linkage
18801 if (cu
->language
== language_cplus
18802 && !cu
->per_cu
->dwarf2_per_objfile
->per_bfd
->types
.empty ()
18803 && die_parent
== NULL
18805 && (tag
== DW_TAG_class_type
18806 || tag
== DW_TAG_structure_type
18807 || tag
== DW_TAG_union_type
))
18808 guess_partial_die_structure_name (this, cu
);
18810 /* GCC might emit a nameless struct or union that has a linkage
18811 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18813 && (tag
== DW_TAG_class_type
18814 || tag
== DW_TAG_interface_type
18815 || tag
== DW_TAG_structure_type
18816 || tag
== DW_TAG_union_type
)
18817 && linkage_name
!= NULL
)
18819 gdb::unique_xmalloc_ptr
<char> demangled
18820 (gdb_demangle (linkage_name
, DMGL_TYPES
));
18821 if (demangled
!= nullptr)
18825 /* Strip any leading namespaces/classes, keep only the base name.
18826 DW_AT_name for named DIEs does not contain the prefixes. */
18827 base
= strrchr (demangled
.get (), ':');
18828 if (base
&& base
> demangled
.get () && base
[-1] == ':')
18831 base
= demangled
.get ();
18833 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18834 name
= objfile
->intern (base
);
18841 /* Read the .debug_loclists header contents from the given SECTION in the
18844 read_loclist_header (struct loclist_header
*header
,
18845 struct dwarf2_section_info
*section
)
18847 unsigned int bytes_read
;
18848 bfd
*abfd
= section
->get_bfd_owner ();
18849 const gdb_byte
*info_ptr
= section
->buffer
;
18850 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
18851 info_ptr
+= bytes_read
;
18852 header
->version
= read_2_bytes (abfd
, info_ptr
);
18854 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
18856 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
18858 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
18861 /* Return the DW_AT_loclists_base value for the CU. */
18863 lookup_loclist_base (struct dwarf2_cu
*cu
)
18865 /* For the .dwo unit, the loclist_base points to the first offset following
18866 the header. The header consists of the following entities-
18867 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
18869 2. version (2 bytes)
18870 3. address size (1 byte)
18871 4. segment selector size (1 byte)
18872 5. offset entry count (4 bytes)
18873 These sizes are derived as per the DWARFv5 standard. */
18874 if (cu
->dwo_unit
!= nullptr)
18876 if (cu
->header
.initial_length_size
== 4)
18877 return LOCLIST_HEADER_SIZE32
;
18878 return LOCLIST_HEADER_SIZE64
;
18880 return cu
->loclist_base
;
18883 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
18884 array of offsets in the .debug_loclists section. */
18886 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
18888 struct dwarf2_per_objfile
*dwarf2_per_objfile
18889 = cu
->per_cu
->dwarf2_per_objfile
;
18890 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18891 bfd
*abfd
= objfile
->obfd
;
18892 ULONGEST loclist_base
= lookup_loclist_base (cu
);
18893 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18895 section
->read (objfile
);
18896 if (section
->buffer
== NULL
)
18897 complaint (_("DW_FORM_loclistx used without .debug_loclists "
18898 "section [in module %s]"), objfile_name (objfile
));
18899 struct loclist_header header
;
18900 read_loclist_header (&header
, section
);
18901 if (loclist_index
>= header
.offset_entry_count
)
18902 complaint (_("DW_FORM_loclistx pointing outside of "
18903 ".debug_loclists offset array [in module %s]"),
18904 objfile_name (objfile
));
18905 if (loclist_base
+ loclist_index
* cu
->header
.offset_size
18907 complaint (_("DW_FORM_loclistx pointing outside of "
18908 ".debug_loclists section [in module %s]"),
18909 objfile_name (objfile
));
18910 const gdb_byte
*info_ptr
18911 = section
->buffer
+ loclist_base
+ loclist_index
* cu
->header
.offset_size
;
18913 if (cu
->header
.offset_size
== 4)
18914 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
18916 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
18919 /* Process the attributes that had to be skipped in the first round. These
18920 attributes are the ones that need str_offsets_base or addr_base attributes.
18921 They could not have been processed in the first round, because at the time
18922 the values of str_offsets_base or addr_base may not have been known. */
18924 read_attribute_reprocess (const struct die_reader_specs
*reader
,
18925 struct attribute
*attr
)
18927 struct dwarf2_cu
*cu
= reader
->cu
;
18928 switch (attr
->form
)
18930 case DW_FORM_addrx
:
18931 case DW_FORM_GNU_addr_index
:
18932 DW_ADDR (attr
) = read_addr_index (cu
, DW_UNSND (attr
));
18934 case DW_FORM_loclistx
:
18935 DW_UNSND (attr
) = read_loclist_index (cu
, DW_UNSND (attr
));
18938 case DW_FORM_strx1
:
18939 case DW_FORM_strx2
:
18940 case DW_FORM_strx3
:
18941 case DW_FORM_strx4
:
18942 case DW_FORM_GNU_str_index
:
18944 unsigned int str_index
= DW_UNSND (attr
);
18945 if (reader
->dwo_file
!= NULL
)
18947 DW_STRING (attr
) = read_dwo_str_index (reader
, str_index
);
18948 DW_STRING_IS_CANONICAL (attr
) = 0;
18952 DW_STRING (attr
) = read_stub_str_index (cu
, str_index
);
18953 DW_STRING_IS_CANONICAL (attr
) = 0;
18958 gdb_assert_not_reached (_("Unexpected DWARF form."));
18962 /* Read an attribute value described by an attribute form. */
18964 static const gdb_byte
*
18965 read_attribute_value (const struct die_reader_specs
*reader
,
18966 struct attribute
*attr
, unsigned form
,
18967 LONGEST implicit_const
, const gdb_byte
*info_ptr
,
18968 bool *need_reprocess
)
18970 struct dwarf2_cu
*cu
= reader
->cu
;
18971 struct dwarf2_per_objfile
*dwarf2_per_objfile
18972 = cu
->per_cu
->dwarf2_per_objfile
;
18973 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18974 bfd
*abfd
= reader
->abfd
;
18975 struct comp_unit_head
*cu_header
= &cu
->header
;
18976 unsigned int bytes_read
;
18977 struct dwarf_block
*blk
;
18978 *need_reprocess
= false;
18980 attr
->form
= (enum dwarf_form
) form
;
18983 case DW_FORM_ref_addr
:
18984 if (cu
->header
.version
== 2)
18985 DW_UNSND (attr
) = cu
->header
.read_address (abfd
, info_ptr
,
18988 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
,
18990 info_ptr
+= bytes_read
;
18992 case DW_FORM_GNU_ref_alt
:
18993 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
18994 info_ptr
+= bytes_read
;
18998 struct gdbarch
*gdbarch
= objfile
->arch ();
18999 DW_ADDR (attr
) = cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
19000 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
19001 info_ptr
+= bytes_read
;
19004 case DW_FORM_block2
:
19005 blk
= dwarf_alloc_block (cu
);
19006 blk
->size
= read_2_bytes (abfd
, info_ptr
);
19008 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19009 info_ptr
+= blk
->size
;
19010 DW_BLOCK (attr
) = blk
;
19012 case DW_FORM_block4
:
19013 blk
= dwarf_alloc_block (cu
);
19014 blk
->size
= read_4_bytes (abfd
, info_ptr
);
19016 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19017 info_ptr
+= blk
->size
;
19018 DW_BLOCK (attr
) = blk
;
19020 case DW_FORM_data2
:
19021 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
19024 case DW_FORM_data4
:
19025 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
19028 case DW_FORM_data8
:
19029 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
19032 case DW_FORM_data16
:
19033 blk
= dwarf_alloc_block (cu
);
19035 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19037 DW_BLOCK (attr
) = blk
;
19039 case DW_FORM_sec_offset
:
19040 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
19041 info_ptr
+= bytes_read
;
19043 case DW_FORM_loclistx
:
19045 *need_reprocess
= true;
19046 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19047 info_ptr
+= bytes_read
;
19050 case DW_FORM_string
:
19051 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19052 DW_STRING_IS_CANONICAL (attr
) = 0;
19053 info_ptr
+= bytes_read
;
19056 if (!cu
->per_cu
->is_dwz
)
19058 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19059 abfd
, info_ptr
, cu_header
,
19061 DW_STRING_IS_CANONICAL (attr
) = 0;
19062 info_ptr
+= bytes_read
;
19066 case DW_FORM_line_strp
:
19067 if (!cu
->per_cu
->is_dwz
)
19070 = dwarf2_per_objfile
->read_line_string (info_ptr
, cu_header
,
19072 DW_STRING_IS_CANONICAL (attr
) = 0;
19073 info_ptr
+= bytes_read
;
19077 case DW_FORM_GNU_strp_alt
:
19079 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19080 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
19083 DW_STRING (attr
) = dwz
->read_string (objfile
, str_offset
);
19084 DW_STRING_IS_CANONICAL (attr
) = 0;
19085 info_ptr
+= bytes_read
;
19088 case DW_FORM_exprloc
:
19089 case DW_FORM_block
:
19090 blk
= dwarf_alloc_block (cu
);
19091 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19092 info_ptr
+= bytes_read
;
19093 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19094 info_ptr
+= blk
->size
;
19095 DW_BLOCK (attr
) = blk
;
19097 case DW_FORM_block1
:
19098 blk
= dwarf_alloc_block (cu
);
19099 blk
->size
= read_1_byte (abfd
, info_ptr
);
19101 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19102 info_ptr
+= blk
->size
;
19103 DW_BLOCK (attr
) = blk
;
19105 case DW_FORM_data1
:
19106 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19110 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19113 case DW_FORM_flag_present
:
19114 DW_UNSND (attr
) = 1;
19116 case DW_FORM_sdata
:
19117 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19118 info_ptr
+= bytes_read
;
19120 case DW_FORM_udata
:
19121 case DW_FORM_rnglistx
:
19122 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19123 info_ptr
+= bytes_read
;
19126 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19127 + read_1_byte (abfd
, info_ptr
));
19131 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19132 + read_2_bytes (abfd
, info_ptr
));
19136 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19137 + read_4_bytes (abfd
, info_ptr
));
19141 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19142 + read_8_bytes (abfd
, info_ptr
));
19145 case DW_FORM_ref_sig8
:
19146 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19149 case DW_FORM_ref_udata
:
19150 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19151 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19152 info_ptr
+= bytes_read
;
19154 case DW_FORM_indirect
:
19155 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19156 info_ptr
+= bytes_read
;
19157 if (form
== DW_FORM_implicit_const
)
19159 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19160 info_ptr
+= bytes_read
;
19162 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19163 info_ptr
, need_reprocess
);
19165 case DW_FORM_implicit_const
:
19166 DW_SND (attr
) = implicit_const
;
19168 case DW_FORM_addrx
:
19169 case DW_FORM_GNU_addr_index
:
19170 *need_reprocess
= true;
19171 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19172 info_ptr
+= bytes_read
;
19175 case DW_FORM_strx1
:
19176 case DW_FORM_strx2
:
19177 case DW_FORM_strx3
:
19178 case DW_FORM_strx4
:
19179 case DW_FORM_GNU_str_index
:
19181 ULONGEST str_index
;
19182 if (form
== DW_FORM_strx1
)
19184 str_index
= read_1_byte (abfd
, info_ptr
);
19187 else if (form
== DW_FORM_strx2
)
19189 str_index
= read_2_bytes (abfd
, info_ptr
);
19192 else if (form
== DW_FORM_strx3
)
19194 str_index
= read_3_bytes (abfd
, info_ptr
);
19197 else if (form
== DW_FORM_strx4
)
19199 str_index
= read_4_bytes (abfd
, info_ptr
);
19204 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19205 info_ptr
+= bytes_read
;
19207 *need_reprocess
= true;
19208 DW_UNSND (attr
) = str_index
;
19212 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19213 dwarf_form_name (form
),
19214 bfd_get_filename (abfd
));
19218 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
19219 attr
->form
= DW_FORM_GNU_ref_alt
;
19221 /* We have seen instances where the compiler tried to emit a byte
19222 size attribute of -1 which ended up being encoded as an unsigned
19223 0xffffffff. Although 0xffffffff is technically a valid size value,
19224 an object of this size seems pretty unlikely so we can relatively
19225 safely treat these cases as if the size attribute was invalid and
19226 treat them as zero by default. */
19227 if (attr
->name
== DW_AT_byte_size
19228 && form
== DW_FORM_data4
19229 && DW_UNSND (attr
) >= 0xffffffff)
19232 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19233 hex_string (DW_UNSND (attr
)));
19234 DW_UNSND (attr
) = 0;
19240 /* Read an attribute described by an abbreviated attribute. */
19242 static const gdb_byte
*
19243 read_attribute (const struct die_reader_specs
*reader
,
19244 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19245 const gdb_byte
*info_ptr
, bool *need_reprocess
)
19247 attr
->name
= abbrev
->name
;
19248 return read_attribute_value (reader
, attr
, abbrev
->form
,
19249 abbrev
->implicit_const
, info_ptr
,
19253 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19255 static const char *
19256 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19257 LONGEST str_offset
)
19259 return dwarf2_per_objfile
->per_bfd
->str
.read_string
19260 (dwarf2_per_objfile
->objfile
, str_offset
, "DW_FORM_strp");
19263 /* Return pointer to string at .debug_str offset as read from BUF.
19264 BUF is assumed to be in a compilation unit described by CU_HEADER.
19265 Return *BYTES_READ_PTR count of bytes read from BUF. */
19267 static const char *
19268 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19269 const gdb_byte
*buf
,
19270 const struct comp_unit_head
*cu_header
,
19271 unsigned int *bytes_read_ptr
)
19273 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19275 return read_indirect_string_at_offset (dwarf2_per_objfile
, str_offset
);
19281 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
19282 const struct comp_unit_head
*cu_header
,
19283 unsigned int *bytes_read_ptr
)
19285 bfd
*abfd
= objfile
->obfd
;
19286 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19288 return per_bfd
->line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
19291 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19292 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
19293 ADDR_SIZE is the size of addresses from the CU header. */
19296 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19297 unsigned int addr_index
, gdb::optional
<ULONGEST
> addr_base
,
19300 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19301 bfd
*abfd
= objfile
->obfd
;
19302 const gdb_byte
*info_ptr
;
19303 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
19305 dwarf2_per_objfile
->per_bfd
->addr
.read (objfile
);
19306 if (dwarf2_per_objfile
->per_bfd
->addr
.buffer
== NULL
)
19307 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19308 objfile_name (objfile
));
19309 if (addr_base_or_zero
+ addr_index
* addr_size
19310 >= dwarf2_per_objfile
->per_bfd
->addr
.size
)
19311 error (_("DW_FORM_addr_index pointing outside of "
19312 ".debug_addr section [in module %s]"),
19313 objfile_name (objfile
));
19314 info_ptr
= (dwarf2_per_objfile
->per_bfd
->addr
.buffer
19315 + addr_base_or_zero
+ addr_index
* addr_size
);
19316 if (addr_size
== 4)
19317 return bfd_get_32 (abfd
, info_ptr
);
19319 return bfd_get_64 (abfd
, info_ptr
);
19322 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19325 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19327 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19328 cu
->addr_base
, cu
->header
.addr_size
);
19331 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19334 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19335 unsigned int *bytes_read
)
19337 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19338 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19340 return read_addr_index (cu
, addr_index
);
19346 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
, unsigned int addr_index
)
19348 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19349 struct dwarf2_cu
*cu
= per_cu
->cu
;
19350 gdb::optional
<ULONGEST
> addr_base
;
19353 /* We need addr_base and addr_size.
19354 If we don't have PER_CU->cu, we have to get it.
19355 Nasty, but the alternative is storing the needed info in PER_CU,
19356 which at this point doesn't seem justified: it's not clear how frequently
19357 it would get used and it would increase the size of every PER_CU.
19358 Entry points like dwarf2_per_cu_addr_size do a similar thing
19359 so we're not in uncharted territory here.
19360 Alas we need to be a bit more complicated as addr_base is contained
19363 We don't need to read the entire CU(/TU).
19364 We just need the header and top level die.
19366 IWBN to use the aging mechanism to let us lazily later discard the CU.
19367 For now we skip this optimization. */
19371 addr_base
= cu
->addr_base
;
19372 addr_size
= cu
->header
.addr_size
;
19376 cutu_reader
reader (per_cu
, NULL
, 0, false);
19377 addr_base
= reader
.cu
->addr_base
;
19378 addr_size
= reader
.cu
->header
.addr_size
;
19381 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19385 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
19386 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
19389 static const char *
19390 read_str_index (struct dwarf2_cu
*cu
,
19391 struct dwarf2_section_info
*str_section
,
19392 struct dwarf2_section_info
*str_offsets_section
,
19393 ULONGEST str_offsets_base
, ULONGEST str_index
)
19395 struct dwarf2_per_objfile
*dwarf2_per_objfile
19396 = cu
->per_cu
->dwarf2_per_objfile
;
19397 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19398 const char *objf_name
= objfile_name (objfile
);
19399 bfd
*abfd
= objfile
->obfd
;
19400 const gdb_byte
*info_ptr
;
19401 ULONGEST str_offset
;
19402 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19404 str_section
->read (objfile
);
19405 str_offsets_section
->read (objfile
);
19406 if (str_section
->buffer
== NULL
)
19407 error (_("%s used without %s section"
19408 " in CU at offset %s [in module %s]"),
19409 form_name
, str_section
->get_name (),
19410 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19411 if (str_offsets_section
->buffer
== NULL
)
19412 error (_("%s used without %s section"
19413 " in CU at offset %s [in module %s]"),
19414 form_name
, str_section
->get_name (),
19415 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19416 info_ptr
= (str_offsets_section
->buffer
19418 + str_index
* cu
->header
.offset_size
);
19419 if (cu
->header
.offset_size
== 4)
19420 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19422 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19423 if (str_offset
>= str_section
->size
)
19424 error (_("Offset from %s pointing outside of"
19425 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19426 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19427 return (const char *) (str_section
->buffer
+ str_offset
);
19430 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
19432 static const char *
19433 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19435 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
19436 ? reader
->cu
->header
.addr_size
: 0;
19437 return read_str_index (reader
->cu
,
19438 &reader
->dwo_file
->sections
.str
,
19439 &reader
->dwo_file
->sections
.str_offsets
,
19440 str_offsets_base
, str_index
);
19443 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
19445 static const char *
19446 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
19448 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19449 const char *objf_name
= objfile_name (objfile
);
19450 static const char form_name
[] = "DW_FORM_GNU_str_index";
19451 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
19453 if (!cu
->str_offsets_base
.has_value ())
19454 error (_("%s used in Fission stub without %s"
19455 " in CU at offset 0x%lx [in module %s]"),
19456 form_name
, str_offsets_attr_name
,
19457 (long) cu
->header
.offset_size
, objf_name
);
19459 return read_str_index (cu
,
19460 &cu
->per_cu
->dwarf2_per_objfile
->per_bfd
->str
,
19461 &cu
->per_cu
->dwarf2_per_objfile
->per_bfd
->str_offsets
,
19462 *cu
->str_offsets_base
, str_index
);
19465 /* Return the length of an LEB128 number in BUF. */
19468 leb128_size (const gdb_byte
*buf
)
19470 const gdb_byte
*begin
= buf
;
19476 if ((byte
& 128) == 0)
19477 return buf
- begin
;
19482 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19491 cu
->language
= language_c
;
19494 case DW_LANG_C_plus_plus
:
19495 case DW_LANG_C_plus_plus_11
:
19496 case DW_LANG_C_plus_plus_14
:
19497 cu
->language
= language_cplus
;
19500 cu
->language
= language_d
;
19502 case DW_LANG_Fortran77
:
19503 case DW_LANG_Fortran90
:
19504 case DW_LANG_Fortran95
:
19505 case DW_LANG_Fortran03
:
19506 case DW_LANG_Fortran08
:
19507 cu
->language
= language_fortran
;
19510 cu
->language
= language_go
;
19512 case DW_LANG_Mips_Assembler
:
19513 cu
->language
= language_asm
;
19515 case DW_LANG_Ada83
:
19516 case DW_LANG_Ada95
:
19517 cu
->language
= language_ada
;
19519 case DW_LANG_Modula2
:
19520 cu
->language
= language_m2
;
19522 case DW_LANG_Pascal83
:
19523 cu
->language
= language_pascal
;
19526 cu
->language
= language_objc
;
19529 case DW_LANG_Rust_old
:
19530 cu
->language
= language_rust
;
19532 case DW_LANG_Cobol74
:
19533 case DW_LANG_Cobol85
:
19535 cu
->language
= language_minimal
;
19538 cu
->language_defn
= language_def (cu
->language
);
19541 /* Return the named attribute or NULL if not there. */
19543 static struct attribute
*
19544 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19549 struct attribute
*spec
= NULL
;
19551 for (i
= 0; i
< die
->num_attrs
; ++i
)
19553 if (die
->attrs
[i
].name
== name
)
19554 return &die
->attrs
[i
];
19555 if (die
->attrs
[i
].name
== DW_AT_specification
19556 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19557 spec
= &die
->attrs
[i
];
19563 die
= follow_die_ref (die
, spec
, &cu
);
19569 /* Return the string associated with a string-typed attribute, or NULL if it
19570 is either not found or is of an incorrect type. */
19572 static const char *
19573 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19575 struct attribute
*attr
;
19576 const char *str
= NULL
;
19578 attr
= dwarf2_attr (die
, name
, cu
);
19582 str
= attr
->value_as_string ();
19583 if (str
== nullptr)
19584 complaint (_("string type expected for attribute %s for "
19585 "DIE at %s in module %s"),
19586 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19587 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19593 /* Return the dwo name or NULL if not present. If present, it is in either
19594 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
19595 static const char *
19596 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19598 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
19599 if (dwo_name
== nullptr)
19600 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
19604 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19605 and holds a non-zero value. This function should only be used for
19606 DW_FORM_flag or DW_FORM_flag_present attributes. */
19609 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19611 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19613 return (attr
&& DW_UNSND (attr
));
19617 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19619 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19620 which value is non-zero. However, we have to be careful with
19621 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19622 (via dwarf2_flag_true_p) follows this attribute. So we may
19623 end up accidently finding a declaration attribute that belongs
19624 to a different DIE referenced by the specification attribute,
19625 even though the given DIE does not have a declaration attribute. */
19626 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19627 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19630 /* Return the die giving the specification for DIE, if there is
19631 one. *SPEC_CU is the CU containing DIE on input, and the CU
19632 containing the return value on output. If there is no
19633 specification, but there is an abstract origin, that is
19636 static struct die_info
*
19637 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19639 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19642 if (spec_attr
== NULL
)
19643 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19645 if (spec_attr
== NULL
)
19648 return follow_die_ref (die
, spec_attr
, spec_cu
);
19651 /* Stub for free_line_header to match void * callback types. */
19654 free_line_header_voidp (void *arg
)
19656 struct line_header
*lh
= (struct line_header
*) arg
;
19661 /* A convenience function to find the proper .debug_line section for a CU. */
19663 static struct dwarf2_section_info
*
19664 get_debug_line_section (struct dwarf2_cu
*cu
)
19666 struct dwarf2_section_info
*section
;
19667 struct dwarf2_per_objfile
*dwarf2_per_objfile
19668 = cu
->per_cu
->dwarf2_per_objfile
;
19670 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19672 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19673 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19674 else if (cu
->per_cu
->is_dwz
)
19676 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19678 section
= &dwz
->line
;
19681 section
= &dwarf2_per_objfile
->per_bfd
->line
;
19686 /* Read the statement program header starting at OFFSET in
19687 .debug_line, or .debug_line.dwo. Return a pointer
19688 to a struct line_header, allocated using xmalloc.
19689 Returns NULL if there is a problem reading the header, e.g., if it
19690 has a version we don't understand.
19692 NOTE: the strings in the include directory and file name tables of
19693 the returned object point into the dwarf line section buffer,
19694 and must not be freed. */
19696 static line_header_up
19697 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
19699 struct dwarf2_section_info
*section
;
19700 struct dwarf2_per_objfile
*dwarf2_per_objfile
19701 = cu
->per_cu
->dwarf2_per_objfile
;
19703 section
= get_debug_line_section (cu
);
19704 section
->read (dwarf2_per_objfile
->objfile
);
19705 if (section
->buffer
== NULL
)
19707 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19708 complaint (_("missing .debug_line.dwo section"));
19710 complaint (_("missing .debug_line section"));
19714 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
19715 dwarf2_per_objfile
, section
,
19719 /* Subroutine of dwarf_decode_lines to simplify it.
19720 Return the file name of the psymtab for the given file_entry.
19721 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19722 If space for the result is malloc'd, *NAME_HOLDER will be set.
19723 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
19725 static const char *
19726 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
19727 const dwarf2_psymtab
*pst
,
19728 const char *comp_dir
,
19729 gdb::unique_xmalloc_ptr
<char> *name_holder
)
19731 const char *include_name
= fe
.name
;
19732 const char *include_name_to_compare
= include_name
;
19733 const char *pst_filename
;
19736 const char *dir_name
= fe
.include_dir (lh
);
19738 gdb::unique_xmalloc_ptr
<char> hold_compare
;
19739 if (!IS_ABSOLUTE_PATH (include_name
)
19740 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
19742 /* Avoid creating a duplicate psymtab for PST.
19743 We do this by comparing INCLUDE_NAME and PST_FILENAME.
19744 Before we do the comparison, however, we need to account
19745 for DIR_NAME and COMP_DIR.
19746 First prepend dir_name (if non-NULL). If we still don't
19747 have an absolute path prepend comp_dir (if non-NULL).
19748 However, the directory we record in the include-file's
19749 psymtab does not contain COMP_DIR (to match the
19750 corresponding symtab(s)).
19755 bash$ gcc -g ./hello.c
19756 include_name = "hello.c"
19758 DW_AT_comp_dir = comp_dir = "/tmp"
19759 DW_AT_name = "./hello.c"
19763 if (dir_name
!= NULL
)
19765 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
19766 include_name
, (char *) NULL
));
19767 include_name
= name_holder
->get ();
19768 include_name_to_compare
= include_name
;
19770 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
19772 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
19773 include_name
, (char *) NULL
));
19774 include_name_to_compare
= hold_compare
.get ();
19778 pst_filename
= pst
->filename
;
19779 gdb::unique_xmalloc_ptr
<char> copied_name
;
19780 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
19782 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
19783 pst_filename
, (char *) NULL
));
19784 pst_filename
= copied_name
.get ();
19787 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
19791 return include_name
;
19794 /* State machine to track the state of the line number program. */
19796 class lnp_state_machine
19799 /* Initialize a machine state for the start of a line number
19801 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
19802 bool record_lines_p
);
19804 file_entry
*current_file ()
19806 /* lh->file_names is 0-based, but the file name numbers in the
19807 statement program are 1-based. */
19808 return m_line_header
->file_name_at (m_file
);
19811 /* Record the line in the state machine. END_SEQUENCE is true if
19812 we're processing the end of a sequence. */
19813 void record_line (bool end_sequence
);
19815 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
19816 nop-out rest of the lines in this sequence. */
19817 void check_line_address (struct dwarf2_cu
*cu
,
19818 const gdb_byte
*line_ptr
,
19819 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
19821 void handle_set_discriminator (unsigned int discriminator
)
19823 m_discriminator
= discriminator
;
19824 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
19827 /* Handle DW_LNE_set_address. */
19828 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
19831 address
+= baseaddr
;
19832 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
19835 /* Handle DW_LNS_advance_pc. */
19836 void handle_advance_pc (CORE_ADDR adjust
);
19838 /* Handle a special opcode. */
19839 void handle_special_opcode (unsigned char op_code
);
19841 /* Handle DW_LNS_advance_line. */
19842 void handle_advance_line (int line_delta
)
19844 advance_line (line_delta
);
19847 /* Handle DW_LNS_set_file. */
19848 void handle_set_file (file_name_index file
);
19850 /* Handle DW_LNS_negate_stmt. */
19851 void handle_negate_stmt ()
19853 m_is_stmt
= !m_is_stmt
;
19856 /* Handle DW_LNS_const_add_pc. */
19857 void handle_const_add_pc ();
19859 /* Handle DW_LNS_fixed_advance_pc. */
19860 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
19862 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19866 /* Handle DW_LNS_copy. */
19867 void handle_copy ()
19869 record_line (false);
19870 m_discriminator
= 0;
19873 /* Handle DW_LNE_end_sequence. */
19874 void handle_end_sequence ()
19876 m_currently_recording_lines
= true;
19880 /* Advance the line by LINE_DELTA. */
19881 void advance_line (int line_delta
)
19883 m_line
+= line_delta
;
19885 if (line_delta
!= 0)
19886 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19889 struct dwarf2_cu
*m_cu
;
19891 gdbarch
*m_gdbarch
;
19893 /* True if we're recording lines.
19894 Otherwise we're building partial symtabs and are just interested in
19895 finding include files mentioned by the line number program. */
19896 bool m_record_lines_p
;
19898 /* The line number header. */
19899 line_header
*m_line_header
;
19901 /* These are part of the standard DWARF line number state machine,
19902 and initialized according to the DWARF spec. */
19904 unsigned char m_op_index
= 0;
19905 /* The line table index of the current file. */
19906 file_name_index m_file
= 1;
19907 unsigned int m_line
= 1;
19909 /* These are initialized in the constructor. */
19911 CORE_ADDR m_address
;
19913 unsigned int m_discriminator
;
19915 /* Additional bits of state we need to track. */
19917 /* The last file that we called dwarf2_start_subfile for.
19918 This is only used for TLLs. */
19919 unsigned int m_last_file
= 0;
19920 /* The last file a line number was recorded for. */
19921 struct subfile
*m_last_subfile
= NULL
;
19923 /* When true, record the lines we decode. */
19924 bool m_currently_recording_lines
= false;
19926 /* The last line number that was recorded, used to coalesce
19927 consecutive entries for the same line. This can happen, for
19928 example, when discriminators are present. PR 17276. */
19929 unsigned int m_last_line
= 0;
19930 bool m_line_has_non_zero_discriminator
= false;
19934 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
19936 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
19937 / m_line_header
->maximum_ops_per_instruction
)
19938 * m_line_header
->minimum_instruction_length
);
19939 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19940 m_op_index
= ((m_op_index
+ adjust
)
19941 % m_line_header
->maximum_ops_per_instruction
);
19945 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
19947 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
19948 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
19949 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
19950 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
19951 / m_line_header
->maximum_ops_per_instruction
)
19952 * m_line_header
->minimum_instruction_length
);
19953 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19954 m_op_index
= ((m_op_index
+ adj_opcode_d
)
19955 % m_line_header
->maximum_ops_per_instruction
);
19957 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
19958 advance_line (line_delta
);
19959 record_line (false);
19960 m_discriminator
= 0;
19964 lnp_state_machine::handle_set_file (file_name_index file
)
19968 const file_entry
*fe
= current_file ();
19970 dwarf2_debug_line_missing_file_complaint ();
19971 else if (m_record_lines_p
)
19973 const char *dir
= fe
->include_dir (m_line_header
);
19975 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
19976 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19977 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
19982 lnp_state_machine::handle_const_add_pc ()
19985 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
19988 = (((m_op_index
+ adjust
)
19989 / m_line_header
->maximum_ops_per_instruction
)
19990 * m_line_header
->minimum_instruction_length
);
19992 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19993 m_op_index
= ((m_op_index
+ adjust
)
19994 % m_line_header
->maximum_ops_per_instruction
);
19997 /* Return non-zero if we should add LINE to the line number table.
19998 LINE is the line to add, LAST_LINE is the last line that was added,
19999 LAST_SUBFILE is the subfile for LAST_LINE.
20000 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20001 had a non-zero discriminator.
20003 We have to be careful in the presence of discriminators.
20004 E.g., for this line:
20006 for (i = 0; i < 100000; i++);
20008 clang can emit four line number entries for that one line,
20009 each with a different discriminator.
20010 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20012 However, we want gdb to coalesce all four entries into one.
20013 Otherwise the user could stepi into the middle of the line and
20014 gdb would get confused about whether the pc really was in the
20015 middle of the line.
20017 Things are further complicated by the fact that two consecutive
20018 line number entries for the same line is a heuristic used by gcc
20019 to denote the end of the prologue. So we can't just discard duplicate
20020 entries, we have to be selective about it. The heuristic we use is
20021 that we only collapse consecutive entries for the same line if at least
20022 one of those entries has a non-zero discriminator. PR 17276.
20024 Note: Addresses in the line number state machine can never go backwards
20025 within one sequence, thus this coalescing is ok. */
20028 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20029 unsigned int line
, unsigned int last_line
,
20030 int line_has_non_zero_discriminator
,
20031 struct subfile
*last_subfile
)
20033 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20035 if (line
!= last_line
)
20037 /* Same line for the same file that we've seen already.
20038 As a last check, for pr 17276, only record the line if the line
20039 has never had a non-zero discriminator. */
20040 if (!line_has_non_zero_discriminator
)
20045 /* Use the CU's builder to record line number LINE beginning at
20046 address ADDRESS in the line table of subfile SUBFILE. */
20049 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20050 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
20051 struct dwarf2_cu
*cu
)
20053 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20055 if (dwarf_line_debug
)
20057 fprintf_unfiltered (gdb_stdlog
,
20058 "Recording line %u, file %s, address %s\n",
20059 line
, lbasename (subfile
->name
),
20060 paddress (gdbarch
, address
));
20064 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
20067 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20068 Mark the end of a set of line number records.
20069 The arguments are the same as for dwarf_record_line_1.
20070 If SUBFILE is NULL the request is ignored. */
20073 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20074 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20076 if (subfile
== NULL
)
20079 if (dwarf_line_debug
)
20081 fprintf_unfiltered (gdb_stdlog
,
20082 "Finishing current line, file %s, address %s\n",
20083 lbasename (subfile
->name
),
20084 paddress (gdbarch
, address
));
20087 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
20091 lnp_state_machine::record_line (bool end_sequence
)
20093 if (dwarf_line_debug
)
20095 fprintf_unfiltered (gdb_stdlog
,
20096 "Processing actual line %u: file %u,"
20097 " address %s, is_stmt %u, discrim %u%s\n",
20099 paddress (m_gdbarch
, m_address
),
20100 m_is_stmt
, m_discriminator
,
20101 (end_sequence
? "\t(end sequence)" : ""));
20104 file_entry
*fe
= current_file ();
20107 dwarf2_debug_line_missing_file_complaint ();
20108 /* For now we ignore lines not starting on an instruction boundary.
20109 But not when processing end_sequence for compatibility with the
20110 previous version of the code. */
20111 else if (m_op_index
== 0 || end_sequence
)
20113 fe
->included_p
= 1;
20114 if (m_record_lines_p
)
20116 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20119 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20120 m_currently_recording_lines
? m_cu
: nullptr);
20125 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
20127 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20128 m_line_has_non_zero_discriminator
,
20131 buildsym_compunit
*builder
= m_cu
->get_builder ();
20132 dwarf_record_line_1 (m_gdbarch
,
20133 builder
->get_current_subfile (),
20134 m_line
, m_address
, is_stmt
,
20135 m_currently_recording_lines
? m_cu
: nullptr);
20137 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20138 m_last_line
= m_line
;
20144 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20145 line_header
*lh
, bool record_lines_p
)
20149 m_record_lines_p
= record_lines_p
;
20150 m_line_header
= lh
;
20152 m_currently_recording_lines
= true;
20154 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20155 was a line entry for it so that the backend has a chance to adjust it
20156 and also record it in case it needs it. This is currently used by MIPS
20157 code, cf. `mips_adjust_dwarf2_line'. */
20158 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20159 m_is_stmt
= lh
->default_is_stmt
;
20160 m_discriminator
= 0;
20164 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20165 const gdb_byte
*line_ptr
,
20166 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20168 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20169 the pc range of the CU. However, we restrict the test to only ADDRESS
20170 values of zero to preserve GDB's previous behaviour which is to handle
20171 the specific case of a function being GC'd by the linker. */
20173 if (address
== 0 && address
< unrelocated_lowpc
)
20175 /* This line table is for a function which has been
20176 GCd by the linker. Ignore it. PR gdb/12528 */
20178 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20179 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20181 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20182 line_offset
, objfile_name (objfile
));
20183 m_currently_recording_lines
= false;
20184 /* Note: m_currently_recording_lines is left as false until we see
20185 DW_LNE_end_sequence. */
20189 /* Subroutine of dwarf_decode_lines to simplify it.
20190 Process the line number information in LH.
20191 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20192 program in order to set included_p for every referenced header. */
20195 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20196 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20198 const gdb_byte
*line_ptr
, *extended_end
;
20199 const gdb_byte
*line_end
;
20200 unsigned int bytes_read
, extended_len
;
20201 unsigned char op_code
, extended_op
;
20202 CORE_ADDR baseaddr
;
20203 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20204 bfd
*abfd
= objfile
->obfd
;
20205 struct gdbarch
*gdbarch
= objfile
->arch ();
20206 /* True if we're recording line info (as opposed to building partial
20207 symtabs and just interested in finding include files mentioned by
20208 the line number program). */
20209 bool record_lines_p
= !decode_for_pst_p
;
20211 baseaddr
= objfile
->text_section_offset ();
20213 line_ptr
= lh
->statement_program_start
;
20214 line_end
= lh
->statement_program_end
;
20216 /* Read the statement sequences until there's nothing left. */
20217 while (line_ptr
< line_end
)
20219 /* The DWARF line number program state machine. Reset the state
20220 machine at the start of each sequence. */
20221 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20222 bool end_sequence
= false;
20224 if (record_lines_p
)
20226 /* Start a subfile for the current file of the state
20228 const file_entry
*fe
= state_machine
.current_file ();
20231 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20234 /* Decode the table. */
20235 while (line_ptr
< line_end
&& !end_sequence
)
20237 op_code
= read_1_byte (abfd
, line_ptr
);
20240 if (op_code
>= lh
->opcode_base
)
20242 /* Special opcode. */
20243 state_machine
.handle_special_opcode (op_code
);
20245 else switch (op_code
)
20247 case DW_LNS_extended_op
:
20248 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20250 line_ptr
+= bytes_read
;
20251 extended_end
= line_ptr
+ extended_len
;
20252 extended_op
= read_1_byte (abfd
, line_ptr
);
20254 switch (extended_op
)
20256 case DW_LNE_end_sequence
:
20257 state_machine
.handle_end_sequence ();
20258 end_sequence
= true;
20260 case DW_LNE_set_address
:
20263 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
20264 line_ptr
+= bytes_read
;
20266 state_machine
.check_line_address (cu
, line_ptr
,
20267 lowpc
- baseaddr
, address
);
20268 state_machine
.handle_set_address (baseaddr
, address
);
20271 case DW_LNE_define_file
:
20273 const char *cur_file
;
20274 unsigned int mod_time
, length
;
20277 cur_file
= read_direct_string (abfd
, line_ptr
,
20279 line_ptr
+= bytes_read
;
20280 dindex
= (dir_index
)
20281 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20282 line_ptr
+= bytes_read
;
20284 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20285 line_ptr
+= bytes_read
;
20287 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20288 line_ptr
+= bytes_read
;
20289 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20292 case DW_LNE_set_discriminator
:
20294 /* The discriminator is not interesting to the
20295 debugger; just ignore it. We still need to
20296 check its value though:
20297 if there are consecutive entries for the same
20298 (non-prologue) line we want to coalesce them.
20301 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20302 line_ptr
+= bytes_read
;
20304 state_machine
.handle_set_discriminator (discr
);
20308 complaint (_("mangled .debug_line section"));
20311 /* Make sure that we parsed the extended op correctly. If e.g.
20312 we expected a different address size than the producer used,
20313 we may have read the wrong number of bytes. */
20314 if (line_ptr
!= extended_end
)
20316 complaint (_("mangled .debug_line section"));
20321 state_machine
.handle_copy ();
20323 case DW_LNS_advance_pc
:
20326 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20327 line_ptr
+= bytes_read
;
20329 state_machine
.handle_advance_pc (adjust
);
20332 case DW_LNS_advance_line
:
20335 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20336 line_ptr
+= bytes_read
;
20338 state_machine
.handle_advance_line (line_delta
);
20341 case DW_LNS_set_file
:
20343 file_name_index file
20344 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20346 line_ptr
+= bytes_read
;
20348 state_machine
.handle_set_file (file
);
20351 case DW_LNS_set_column
:
20352 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20353 line_ptr
+= bytes_read
;
20355 case DW_LNS_negate_stmt
:
20356 state_machine
.handle_negate_stmt ();
20358 case DW_LNS_set_basic_block
:
20360 /* Add to the address register of the state machine the
20361 address increment value corresponding to special opcode
20362 255. I.e., this value is scaled by the minimum
20363 instruction length since special opcode 255 would have
20364 scaled the increment. */
20365 case DW_LNS_const_add_pc
:
20366 state_machine
.handle_const_add_pc ();
20368 case DW_LNS_fixed_advance_pc
:
20370 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20373 state_machine
.handle_fixed_advance_pc (addr_adj
);
20378 /* Unknown standard opcode, ignore it. */
20381 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20383 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20384 line_ptr
+= bytes_read
;
20391 dwarf2_debug_line_missing_end_sequence_complaint ();
20393 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20394 in which case we still finish recording the last line). */
20395 state_machine
.record_line (true);
20399 /* Decode the Line Number Program (LNP) for the given line_header
20400 structure and CU. The actual information extracted and the type
20401 of structures created from the LNP depends on the value of PST.
20403 1. If PST is NULL, then this procedure uses the data from the program
20404 to create all necessary symbol tables, and their linetables.
20406 2. If PST is not NULL, this procedure reads the program to determine
20407 the list of files included by the unit represented by PST, and
20408 builds all the associated partial symbol tables.
20410 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20411 It is used for relative paths in the line table.
20412 NOTE: When processing partial symtabs (pst != NULL),
20413 comp_dir == pst->dirname.
20415 NOTE: It is important that psymtabs have the same file name (via strcmp)
20416 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20417 symtab we don't use it in the name of the psymtabs we create.
20418 E.g. expand_line_sal requires this when finding psymtabs to expand.
20419 A good testcase for this is mb-inline.exp.
20421 LOWPC is the lowest address in CU (or 0 if not known).
20423 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20424 for its PC<->lines mapping information. Otherwise only the filename
20425 table is read in. */
20428 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20429 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
20430 CORE_ADDR lowpc
, int decode_mapping
)
20432 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20433 const int decode_for_pst_p
= (pst
!= NULL
);
20435 if (decode_mapping
)
20436 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20438 if (decode_for_pst_p
)
20440 /* Now that we're done scanning the Line Header Program, we can
20441 create the psymtab of each included file. */
20442 for (auto &file_entry
: lh
->file_names ())
20443 if (file_entry
.included_p
== 1)
20445 gdb::unique_xmalloc_ptr
<char> name_holder
;
20446 const char *include_name
=
20447 psymtab_include_file_name (lh
, file_entry
, pst
,
20448 comp_dir
, &name_holder
);
20449 if (include_name
!= NULL
)
20450 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20455 /* Make sure a symtab is created for every file, even files
20456 which contain only variables (i.e. no code with associated
20458 buildsym_compunit
*builder
= cu
->get_builder ();
20459 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
20461 for (auto &fe
: lh
->file_names ())
20463 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20464 if (builder
->get_current_subfile ()->symtab
== NULL
)
20466 builder
->get_current_subfile ()->symtab
20467 = allocate_symtab (cust
,
20468 builder
->get_current_subfile ()->name
);
20470 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
20475 /* Start a subfile for DWARF. FILENAME is the name of the file and
20476 DIRNAME the name of the source directory which contains FILENAME
20477 or NULL if not known.
20478 This routine tries to keep line numbers from identical absolute and
20479 relative file names in a common subfile.
20481 Using the `list' example from the GDB testsuite, which resides in
20482 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20483 of /srcdir/list0.c yields the following debugging information for list0.c:
20485 DW_AT_name: /srcdir/list0.c
20486 DW_AT_comp_dir: /compdir
20487 files.files[0].name: list0.h
20488 files.files[0].dir: /srcdir
20489 files.files[1].name: list0.c
20490 files.files[1].dir: /srcdir
20492 The line number information for list0.c has to end up in a single
20493 subfile, so that `break /srcdir/list0.c:1' works as expected.
20494 start_subfile will ensure that this happens provided that we pass the
20495 concatenation of files.files[1].dir and files.files[1].name as the
20499 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
20500 const char *dirname
)
20502 gdb::unique_xmalloc_ptr
<char> copy
;
20504 /* In order not to lose the line information directory,
20505 we concatenate it to the filename when it makes sense.
20506 Note that the Dwarf3 standard says (speaking of filenames in line
20507 information): ``The directory index is ignored for file names
20508 that represent full path names''. Thus ignoring dirname in the
20509 `else' branch below isn't an issue. */
20511 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
20513 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
20514 filename
= copy
.get ();
20517 cu
->get_builder ()->start_subfile (filename
);
20520 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
20521 buildsym_compunit constructor. */
20523 struct compunit_symtab
*
20524 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
20527 gdb_assert (m_builder
== nullptr);
20529 m_builder
.reset (new struct buildsym_compunit
20530 (per_cu
->dwarf2_per_objfile
->objfile
,
20531 name
, comp_dir
, language
, low_pc
));
20533 list_in_scope
= get_builder ()->get_file_symbols ();
20535 get_builder ()->record_debugformat ("DWARF 2");
20536 get_builder ()->record_producer (producer
);
20538 processing_has_namespace_info
= false;
20540 return get_builder ()->get_compunit_symtab ();
20544 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
20545 struct dwarf2_cu
*cu
)
20547 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20548 struct comp_unit_head
*cu_header
= &cu
->header
;
20550 /* NOTE drow/2003-01-30: There used to be a comment and some special
20551 code here to turn a symbol with DW_AT_external and a
20552 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
20553 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
20554 with some versions of binutils) where shared libraries could have
20555 relocations against symbols in their debug information - the
20556 minimal symbol would have the right address, but the debug info
20557 would not. It's no longer necessary, because we will explicitly
20558 apply relocations when we read in the debug information now. */
20560 /* A DW_AT_location attribute with no contents indicates that a
20561 variable has been optimized away. */
20562 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0)
20564 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20568 /* Handle one degenerate form of location expression specially, to
20569 preserve GDB's previous behavior when section offsets are
20570 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
20571 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
20573 if (attr
->form_is_block ()
20574 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
20575 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
20576 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
20577 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
20578 && (DW_BLOCK (attr
)->size
20579 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
20581 unsigned int dummy
;
20583 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
20584 SET_SYMBOL_VALUE_ADDRESS
20585 (sym
, cu
->header
.read_address (objfile
->obfd
,
20586 DW_BLOCK (attr
)->data
+ 1,
20589 SET_SYMBOL_VALUE_ADDRESS
20590 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
20592 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
20593 fixup_symbol_section (sym
, objfile
);
20594 SET_SYMBOL_VALUE_ADDRESS
20596 SYMBOL_VALUE_ADDRESS (sym
)
20597 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
20601 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
20602 expression evaluator, and use LOC_COMPUTED only when necessary
20603 (i.e. when the value of a register or memory location is
20604 referenced, or a thread-local block, etc.). Then again, it might
20605 not be worthwhile. I'm assuming that it isn't unless performance
20606 or memory numbers show me otherwise. */
20608 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
20610 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
20611 cu
->has_loclist
= true;
20614 /* Given a pointer to a DWARF information entry, figure out if we need
20615 to make a symbol table entry for it, and if so, create a new entry
20616 and return a pointer to it.
20617 If TYPE is NULL, determine symbol type from the die, otherwise
20618 used the passed type.
20619 If SPACE is not NULL, use it to hold the new symbol. If it is
20620 NULL, allocate a new symbol on the objfile's obstack. */
20622 static struct symbol
*
20623 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
20624 struct symbol
*space
)
20626 struct dwarf2_per_objfile
*dwarf2_per_objfile
20627 = cu
->per_cu
->dwarf2_per_objfile
;
20628 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20629 struct gdbarch
*gdbarch
= objfile
->arch ();
20630 struct symbol
*sym
= NULL
;
20632 struct attribute
*attr
= NULL
;
20633 struct attribute
*attr2
= NULL
;
20634 CORE_ADDR baseaddr
;
20635 struct pending
**list_to_add
= NULL
;
20637 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
20639 baseaddr
= objfile
->text_section_offset ();
20641 name
= dwarf2_name (die
, cu
);
20644 int suppress_add
= 0;
20649 sym
= new (&objfile
->objfile_obstack
) symbol
;
20650 OBJSTAT (objfile
, n_syms
++);
20652 /* Cache this symbol's name and the name's demangled form (if any). */
20653 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
20654 /* Fortran does not have mangling standard and the mangling does differ
20655 between gfortran, iFort etc. */
20656 const char *physname
20657 = (cu
->language
== language_fortran
20658 ? dwarf2_full_name (name
, die
, cu
)
20659 : dwarf2_physname (name
, die
, cu
));
20660 const char *linkagename
= dw2_linkage_name (die
, cu
);
20662 if (linkagename
== nullptr || cu
->language
== language_ada
)
20663 sym
->set_linkage_name (physname
);
20666 sym
->set_demangled_name (physname
, &objfile
->objfile_obstack
);
20667 sym
->set_linkage_name (linkagename
);
20670 /* Default assumptions.
20671 Use the passed type or decode it from the die. */
20672 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20673 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20675 SYMBOL_TYPE (sym
) = type
;
20677 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
20678 attr
= dwarf2_attr (die
,
20679 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
20681 if (attr
!= nullptr)
20683 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
20686 attr
= dwarf2_attr (die
,
20687 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
20689 if (attr
!= nullptr)
20691 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
20692 struct file_entry
*fe
;
20694 if (cu
->line_header
!= NULL
)
20695 fe
= cu
->line_header
->file_name_at (file_index
);
20700 complaint (_("file index out of range"));
20702 symbol_set_symtab (sym
, fe
->symtab
);
20708 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
20709 if (attr
!= nullptr)
20713 addr
= attr
->value_as_address ();
20714 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
20715 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
20717 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
20718 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
20719 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
20720 add_symbol_to_list (sym
, cu
->list_in_scope
);
20722 case DW_TAG_subprogram
:
20723 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20725 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20726 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20727 if ((attr2
&& (DW_UNSND (attr2
) != 0))
20728 || cu
->language
== language_ada
20729 || cu
->language
== language_fortran
)
20731 /* Subprograms marked external are stored as a global symbol.
20732 Ada and Fortran subprograms, whether marked external or
20733 not, are always stored as a global symbol, because we want
20734 to be able to access them globally. For instance, we want
20735 to be able to break on a nested subprogram without having
20736 to specify the context. */
20737 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20741 list_to_add
= cu
->list_in_scope
;
20744 case DW_TAG_inlined_subroutine
:
20745 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20747 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20748 SYMBOL_INLINED (sym
) = 1;
20749 list_to_add
= cu
->list_in_scope
;
20751 case DW_TAG_template_value_param
:
20753 /* Fall through. */
20754 case DW_TAG_constant
:
20755 case DW_TAG_variable
:
20756 case DW_TAG_member
:
20757 /* Compilation with minimal debug info may result in
20758 variables with missing type entries. Change the
20759 misleading `void' type to something sensible. */
20760 if (SYMBOL_TYPE (sym
)->code () == TYPE_CODE_VOID
)
20761 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
20763 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20764 /* In the case of DW_TAG_member, we should only be called for
20765 static const members. */
20766 if (die
->tag
== DW_TAG_member
)
20768 /* dwarf2_add_field uses die_is_declaration,
20769 so we do the same. */
20770 gdb_assert (die_is_declaration (die
, cu
));
20773 if (attr
!= nullptr)
20775 dwarf2_const_value (attr
, sym
, cu
);
20776 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20779 if (attr2
&& (DW_UNSND (attr2
) != 0))
20780 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20782 list_to_add
= cu
->list_in_scope
;
20786 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20787 if (attr
!= nullptr)
20789 var_decode_location (attr
, sym
, cu
);
20790 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20792 /* Fortran explicitly imports any global symbols to the local
20793 scope by DW_TAG_common_block. */
20794 if (cu
->language
== language_fortran
&& die
->parent
20795 && die
->parent
->tag
== DW_TAG_common_block
)
20798 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20799 && SYMBOL_VALUE_ADDRESS (sym
) == 0
20800 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
20802 /* When a static variable is eliminated by the linker,
20803 the corresponding debug information is not stripped
20804 out, but the variable address is set to null;
20805 do not add such variables into symbol table. */
20807 else if (attr2
&& (DW_UNSND (attr2
) != 0))
20809 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20810 && (objfile
->flags
& OBJF_MAINLINE
) == 0
20811 && dwarf2_per_objfile
->per_bfd
->can_copy
)
20813 /* A global static variable might be subject to
20814 copy relocation. We first check for a local
20815 minsym, though, because maybe the symbol was
20816 marked hidden, in which case this would not
20818 bound_minimal_symbol found
20819 = (lookup_minimal_symbol_linkage
20820 (sym
->linkage_name (), objfile
));
20821 if (found
.minsym
!= nullptr)
20822 sym
->maybe_copied
= 1;
20825 /* A variable with DW_AT_external is never static,
20826 but it may be block-scoped. */
20828 = ((cu
->list_in_scope
20829 == cu
->get_builder ()->get_file_symbols ())
20830 ? cu
->get_builder ()->get_global_symbols ()
20831 : cu
->list_in_scope
);
20834 list_to_add
= cu
->list_in_scope
;
20838 /* We do not know the address of this symbol.
20839 If it is an external symbol and we have type information
20840 for it, enter the symbol as a LOC_UNRESOLVED symbol.
20841 The address of the variable will then be determined from
20842 the minimal symbol table whenever the variable is
20844 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20846 /* Fortran explicitly imports any global symbols to the local
20847 scope by DW_TAG_common_block. */
20848 if (cu
->language
== language_fortran
&& die
->parent
20849 && die
->parent
->tag
== DW_TAG_common_block
)
20851 /* SYMBOL_CLASS doesn't matter here because
20852 read_common_block is going to reset it. */
20854 list_to_add
= cu
->list_in_scope
;
20856 else if (attr2
&& (DW_UNSND (attr2
) != 0)
20857 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
20859 /* A variable with DW_AT_external is never static, but it
20860 may be block-scoped. */
20862 = ((cu
->list_in_scope
20863 == cu
->get_builder ()->get_file_symbols ())
20864 ? cu
->get_builder ()->get_global_symbols ()
20865 : cu
->list_in_scope
);
20867 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20869 else if (!die_is_declaration (die
, cu
))
20871 /* Use the default LOC_OPTIMIZED_OUT class. */
20872 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
20874 list_to_add
= cu
->list_in_scope
;
20878 case DW_TAG_formal_parameter
:
20880 /* If we are inside a function, mark this as an argument. If
20881 not, we might be looking at an argument to an inlined function
20882 when we do not have enough information to show inlined frames;
20883 pretend it's a local variable in that case so that the user can
20885 struct context_stack
*curr
20886 = cu
->get_builder ()->get_current_context_stack ();
20887 if (curr
!= nullptr && curr
->name
!= nullptr)
20888 SYMBOL_IS_ARGUMENT (sym
) = 1;
20889 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20890 if (attr
!= nullptr)
20892 var_decode_location (attr
, sym
, cu
);
20894 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20895 if (attr
!= nullptr)
20897 dwarf2_const_value (attr
, sym
, cu
);
20900 list_to_add
= cu
->list_in_scope
;
20903 case DW_TAG_unspecified_parameters
:
20904 /* From varargs functions; gdb doesn't seem to have any
20905 interest in this information, so just ignore it for now.
20908 case DW_TAG_template_type_param
:
20910 /* Fall through. */
20911 case DW_TAG_class_type
:
20912 case DW_TAG_interface_type
:
20913 case DW_TAG_structure_type
:
20914 case DW_TAG_union_type
:
20915 case DW_TAG_set_type
:
20916 case DW_TAG_enumeration_type
:
20917 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20918 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
20921 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
20922 really ever be static objects: otherwise, if you try
20923 to, say, break of a class's method and you're in a file
20924 which doesn't mention that class, it won't work unless
20925 the check for all static symbols in lookup_symbol_aux
20926 saves you. See the OtherFileClass tests in
20927 gdb.c++/namespace.exp. */
20931 buildsym_compunit
*builder
= cu
->get_builder ();
20933 = (cu
->list_in_scope
== builder
->get_file_symbols ()
20934 && cu
->language
== language_cplus
20935 ? builder
->get_global_symbols ()
20936 : cu
->list_in_scope
);
20938 /* The semantics of C++ state that "struct foo {
20939 ... }" also defines a typedef for "foo". */
20940 if (cu
->language
== language_cplus
20941 || cu
->language
== language_ada
20942 || cu
->language
== language_d
20943 || cu
->language
== language_rust
)
20945 /* The symbol's name is already allocated along
20946 with this objfile, so we don't need to
20947 duplicate it for the type. */
20948 if (SYMBOL_TYPE (sym
)->name () == 0)
20949 SYMBOL_TYPE (sym
)->set_name (sym
->search_name ());
20954 case DW_TAG_typedef
:
20955 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20956 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20957 list_to_add
= cu
->list_in_scope
;
20959 case DW_TAG_base_type
:
20960 case DW_TAG_subrange_type
:
20961 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20962 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20963 list_to_add
= cu
->list_in_scope
;
20965 case DW_TAG_enumerator
:
20966 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20967 if (attr
!= nullptr)
20969 dwarf2_const_value (attr
, sym
, cu
);
20972 /* NOTE: carlton/2003-11-10: See comment above in the
20973 DW_TAG_class_type, etc. block. */
20976 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
20977 && cu
->language
== language_cplus
20978 ? cu
->get_builder ()->get_global_symbols ()
20979 : cu
->list_in_scope
);
20982 case DW_TAG_imported_declaration
:
20983 case DW_TAG_namespace
:
20984 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20985 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20987 case DW_TAG_module
:
20988 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20989 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
20990 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20992 case DW_TAG_common_block
:
20993 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
20994 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
20995 add_symbol_to_list (sym
, cu
->list_in_scope
);
20998 /* Not a tag we recognize. Hopefully we aren't processing
20999 trash data, but since we must specifically ignore things
21000 we don't recognize, there is nothing else we should do at
21002 complaint (_("unsupported tag: '%s'"),
21003 dwarf_tag_name (die
->tag
));
21009 sym
->hash_next
= objfile
->template_symbols
;
21010 objfile
->template_symbols
= sym
;
21011 list_to_add
= NULL
;
21014 if (list_to_add
!= NULL
)
21015 add_symbol_to_list (sym
, list_to_add
);
21017 /* For the benefit of old versions of GCC, check for anonymous
21018 namespaces based on the demangled name. */
21019 if (!cu
->processing_has_namespace_info
21020 && cu
->language
== language_cplus
)
21021 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21026 /* Given an attr with a DW_FORM_dataN value in host byte order,
21027 zero-extend it as appropriate for the symbol's type. The DWARF
21028 standard (v4) is not entirely clear about the meaning of using
21029 DW_FORM_dataN for a constant with a signed type, where the type is
21030 wider than the data. The conclusion of a discussion on the DWARF
21031 list was that this is unspecified. We choose to always zero-extend
21032 because that is the interpretation long in use by GCC. */
21035 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21036 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21038 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21039 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21040 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21041 LONGEST l
= DW_UNSND (attr
);
21043 if (bits
< sizeof (*value
) * 8)
21045 l
&= ((LONGEST
) 1 << bits
) - 1;
21048 else if (bits
== sizeof (*value
) * 8)
21052 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21053 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21060 /* Read a constant value from an attribute. Either set *VALUE, or if
21061 the value does not fit in *VALUE, set *BYTES - either already
21062 allocated on the objfile obstack, or newly allocated on OBSTACK,
21063 or, set *BATON, if we translated the constant to a location
21067 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21068 const char *name
, struct obstack
*obstack
,
21069 struct dwarf2_cu
*cu
,
21070 LONGEST
*value
, const gdb_byte
**bytes
,
21071 struct dwarf2_locexpr_baton
**baton
)
21073 dwarf2_per_objfile
*per_objfile
= cu
->per_cu
->dwarf2_per_objfile
;
21074 struct objfile
*objfile
= per_objfile
->objfile
;
21075 struct comp_unit_head
*cu_header
= &cu
->header
;
21076 struct dwarf_block
*blk
;
21077 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21078 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21084 switch (attr
->form
)
21087 case DW_FORM_addrx
:
21088 case DW_FORM_GNU_addr_index
:
21092 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21093 dwarf2_const_value_length_mismatch_complaint (name
,
21094 cu_header
->addr_size
,
21095 TYPE_LENGTH (type
));
21096 /* Symbols of this form are reasonably rare, so we just
21097 piggyback on the existing location code rather than writing
21098 a new implementation of symbol_computed_ops. */
21099 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21100 (*baton
)->per_objfile
= per_objfile
;
21101 (*baton
)->per_cu
= cu
->per_cu
;
21102 gdb_assert ((*baton
)->per_cu
);
21104 (*baton
)->size
= 2 + cu_header
->addr_size
;
21105 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21106 (*baton
)->data
= data
;
21108 data
[0] = DW_OP_addr
;
21109 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21110 byte_order
, DW_ADDR (attr
));
21111 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21114 case DW_FORM_string
:
21117 case DW_FORM_GNU_str_index
:
21118 case DW_FORM_GNU_strp_alt
:
21119 /* DW_STRING is already allocated on the objfile obstack, point
21121 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21123 case DW_FORM_block1
:
21124 case DW_FORM_block2
:
21125 case DW_FORM_block4
:
21126 case DW_FORM_block
:
21127 case DW_FORM_exprloc
:
21128 case DW_FORM_data16
:
21129 blk
= DW_BLOCK (attr
);
21130 if (TYPE_LENGTH (type
) != blk
->size
)
21131 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21132 TYPE_LENGTH (type
));
21133 *bytes
= blk
->data
;
21136 /* The DW_AT_const_value attributes are supposed to carry the
21137 symbol's value "represented as it would be on the target
21138 architecture." By the time we get here, it's already been
21139 converted to host endianness, so we just need to sign- or
21140 zero-extend it as appropriate. */
21141 case DW_FORM_data1
:
21142 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21144 case DW_FORM_data2
:
21145 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21147 case DW_FORM_data4
:
21148 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21150 case DW_FORM_data8
:
21151 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21154 case DW_FORM_sdata
:
21155 case DW_FORM_implicit_const
:
21156 *value
= DW_SND (attr
);
21159 case DW_FORM_udata
:
21160 *value
= DW_UNSND (attr
);
21164 complaint (_("unsupported const value attribute form: '%s'"),
21165 dwarf_form_name (attr
->form
));
21172 /* Copy constant value from an attribute to a symbol. */
21175 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21176 struct dwarf2_cu
*cu
)
21178 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21180 const gdb_byte
*bytes
;
21181 struct dwarf2_locexpr_baton
*baton
;
21183 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21184 sym
->print_name (),
21185 &objfile
->objfile_obstack
, cu
,
21186 &value
, &bytes
, &baton
);
21190 SYMBOL_LOCATION_BATON (sym
) = baton
;
21191 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21193 else if (bytes
!= NULL
)
21195 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21196 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21200 SYMBOL_VALUE (sym
) = value
;
21201 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21205 /* Return the type of the die in question using its DW_AT_type attribute. */
21207 static struct type
*
21208 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21210 struct attribute
*type_attr
;
21212 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21215 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21216 /* A missing DW_AT_type represents a void type. */
21217 return objfile_type (objfile
)->builtin_void
;
21220 return lookup_die_type (die
, type_attr
, cu
);
21223 /* True iff CU's producer generates GNAT Ada auxiliary information
21224 that allows to find parallel types through that information instead
21225 of having to do expensive parallel lookups by type name. */
21228 need_gnat_info (struct dwarf2_cu
*cu
)
21230 /* Assume that the Ada compiler was GNAT, which always produces
21231 the auxiliary information. */
21232 return (cu
->language
== language_ada
);
21235 /* Return the auxiliary type of the die in question using its
21236 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21237 attribute is not present. */
21239 static struct type
*
21240 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21242 struct attribute
*type_attr
;
21244 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21248 return lookup_die_type (die
, type_attr
, cu
);
21251 /* If DIE has a descriptive_type attribute, then set the TYPE's
21252 descriptive type accordingly. */
21255 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21256 struct dwarf2_cu
*cu
)
21258 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21260 if (descriptive_type
)
21262 ALLOCATE_GNAT_AUX_TYPE (type
);
21263 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21267 /* Return the containing type of the die in question using its
21268 DW_AT_containing_type attribute. */
21270 static struct type
*
21271 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21273 struct attribute
*type_attr
;
21274 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21276 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21278 error (_("Dwarf Error: Problem turning containing type into gdb type "
21279 "[in module %s]"), objfile_name (objfile
));
21281 return lookup_die_type (die
, type_attr
, cu
);
21284 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21286 static struct type
*
21287 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21289 struct dwarf2_per_objfile
*dwarf2_per_objfile
21290 = cu
->per_cu
->dwarf2_per_objfile
;
21291 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21294 std::string message
21295 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
21296 objfile_name (objfile
),
21297 sect_offset_str (cu
->header
.sect_off
),
21298 sect_offset_str (die
->sect_off
));
21299 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
21301 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21304 /* Look up the type of DIE in CU using its type attribute ATTR.
21305 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21306 DW_AT_containing_type.
21307 If there is no type substitute an error marker. */
21309 static struct type
*
21310 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21311 struct dwarf2_cu
*cu
)
21313 struct dwarf2_per_objfile
*dwarf2_per_objfile
21314 = cu
->per_cu
->dwarf2_per_objfile
;
21315 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21316 struct type
*this_type
;
21318 gdb_assert (attr
->name
== DW_AT_type
21319 || attr
->name
== DW_AT_GNAT_descriptive_type
21320 || attr
->name
== DW_AT_containing_type
);
21322 /* First see if we have it cached. */
21324 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21326 struct dwarf2_per_cu_data
*per_cu
;
21327 sect_offset sect_off
= attr
->get_ref_die_offset ();
21329 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21330 dwarf2_per_objfile
);
21331 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21333 else if (attr
->form_is_ref ())
21335 sect_offset sect_off
= attr
->get_ref_die_offset ();
21337 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21339 else if (attr
->form
== DW_FORM_ref_sig8
)
21341 ULONGEST signature
= DW_SIGNATURE (attr
);
21343 return get_signatured_type (die
, signature
, cu
);
21347 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21348 " at %s [in module %s]"),
21349 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21350 objfile_name (objfile
));
21351 return build_error_marker_type (cu
, die
);
21354 /* If not cached we need to read it in. */
21356 if (this_type
== NULL
)
21358 struct die_info
*type_die
= NULL
;
21359 struct dwarf2_cu
*type_cu
= cu
;
21361 if (attr
->form_is_ref ())
21362 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21363 if (type_die
== NULL
)
21364 return build_error_marker_type (cu
, die
);
21365 /* If we find the type now, it's probably because the type came
21366 from an inter-CU reference and the type's CU got expanded before
21368 this_type
= read_type_die (type_die
, type_cu
);
21371 /* If we still don't have a type use an error marker. */
21373 if (this_type
== NULL
)
21374 return build_error_marker_type (cu
, die
);
21379 /* Return the type in DIE, CU.
21380 Returns NULL for invalid types.
21382 This first does a lookup in die_type_hash,
21383 and only reads the die in if necessary.
21385 NOTE: This can be called when reading in partial or full symbols. */
21387 static struct type
*
21388 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21390 struct type
*this_type
;
21392 this_type
= get_die_type (die
, cu
);
21396 return read_type_die_1 (die
, cu
);
21399 /* Read the type in DIE, CU.
21400 Returns NULL for invalid types. */
21402 static struct type
*
21403 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21405 struct type
*this_type
= NULL
;
21409 case DW_TAG_class_type
:
21410 case DW_TAG_interface_type
:
21411 case DW_TAG_structure_type
:
21412 case DW_TAG_union_type
:
21413 this_type
= read_structure_type (die
, cu
);
21415 case DW_TAG_enumeration_type
:
21416 this_type
= read_enumeration_type (die
, cu
);
21418 case DW_TAG_subprogram
:
21419 case DW_TAG_subroutine_type
:
21420 case DW_TAG_inlined_subroutine
:
21421 this_type
= read_subroutine_type (die
, cu
);
21423 case DW_TAG_array_type
:
21424 this_type
= read_array_type (die
, cu
);
21426 case DW_TAG_set_type
:
21427 this_type
= read_set_type (die
, cu
);
21429 case DW_TAG_pointer_type
:
21430 this_type
= read_tag_pointer_type (die
, cu
);
21432 case DW_TAG_ptr_to_member_type
:
21433 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21435 case DW_TAG_reference_type
:
21436 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21438 case DW_TAG_rvalue_reference_type
:
21439 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21441 case DW_TAG_const_type
:
21442 this_type
= read_tag_const_type (die
, cu
);
21444 case DW_TAG_volatile_type
:
21445 this_type
= read_tag_volatile_type (die
, cu
);
21447 case DW_TAG_restrict_type
:
21448 this_type
= read_tag_restrict_type (die
, cu
);
21450 case DW_TAG_string_type
:
21451 this_type
= read_tag_string_type (die
, cu
);
21453 case DW_TAG_typedef
:
21454 this_type
= read_typedef (die
, cu
);
21456 case DW_TAG_subrange_type
:
21457 this_type
= read_subrange_type (die
, cu
);
21459 case DW_TAG_base_type
:
21460 this_type
= read_base_type (die
, cu
);
21462 case DW_TAG_unspecified_type
:
21463 this_type
= read_unspecified_type (die
, cu
);
21465 case DW_TAG_namespace
:
21466 this_type
= read_namespace_type (die
, cu
);
21468 case DW_TAG_module
:
21469 this_type
= read_module_type (die
, cu
);
21471 case DW_TAG_atomic_type
:
21472 this_type
= read_tag_atomic_type (die
, cu
);
21475 complaint (_("unexpected tag in read_type_die: '%s'"),
21476 dwarf_tag_name (die
->tag
));
21483 /* See if we can figure out if the class lives in a namespace. We do
21484 this by looking for a member function; its demangled name will
21485 contain namespace info, if there is any.
21486 Return the computed name or NULL.
21487 Space for the result is allocated on the objfile's obstack.
21488 This is the full-die version of guess_partial_die_structure_name.
21489 In this case we know DIE has no useful parent. */
21491 static const char *
21492 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21494 struct die_info
*spec_die
;
21495 struct dwarf2_cu
*spec_cu
;
21496 struct die_info
*child
;
21497 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21500 spec_die
= die_specification (die
, &spec_cu
);
21501 if (spec_die
!= NULL
)
21507 for (child
= die
->child
;
21509 child
= child
->sibling
)
21511 if (child
->tag
== DW_TAG_subprogram
)
21513 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21515 if (linkage_name
!= NULL
)
21517 gdb::unique_xmalloc_ptr
<char> actual_name
21518 (language_class_name_from_physname (cu
->language_defn
,
21520 const char *name
= NULL
;
21522 if (actual_name
!= NULL
)
21524 const char *die_name
= dwarf2_name (die
, cu
);
21526 if (die_name
!= NULL
21527 && strcmp (die_name
, actual_name
.get ()) != 0)
21529 /* Strip off the class name from the full name.
21530 We want the prefix. */
21531 int die_name_len
= strlen (die_name
);
21532 int actual_name_len
= strlen (actual_name
.get ());
21533 const char *ptr
= actual_name
.get ();
21535 /* Test for '::' as a sanity check. */
21536 if (actual_name_len
> die_name_len
+ 2
21537 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
21538 name
= obstack_strndup (
21539 &objfile
->per_bfd
->storage_obstack
,
21540 ptr
, actual_name_len
- die_name_len
- 2);
21551 /* GCC might emit a nameless typedef that has a linkage name. Determine the
21552 prefix part in such case. See
21553 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21555 static const char *
21556 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21558 struct attribute
*attr
;
21561 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
21562 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
21565 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
21568 attr
= dw2_linkage_name_attr (die
, cu
);
21569 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21572 /* dwarf2_name had to be already called. */
21573 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
21575 /* Strip the base name, keep any leading namespaces/classes. */
21576 base
= strrchr (DW_STRING (attr
), ':');
21577 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
21580 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21581 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
21583 &base
[-1] - DW_STRING (attr
));
21586 /* Return the name of the namespace/class that DIE is defined within,
21587 or "" if we can't tell. The caller should not xfree the result.
21589 For example, if we're within the method foo() in the following
21599 then determine_prefix on foo's die will return "N::C". */
21601 static const char *
21602 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21604 struct dwarf2_per_objfile
*dwarf2_per_objfile
21605 = cu
->per_cu
->dwarf2_per_objfile
;
21606 struct die_info
*parent
, *spec_die
;
21607 struct dwarf2_cu
*spec_cu
;
21608 struct type
*parent_type
;
21609 const char *retval
;
21611 if (cu
->language
!= language_cplus
21612 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
21613 && cu
->language
!= language_rust
)
21616 retval
= anonymous_struct_prefix (die
, cu
);
21620 /* We have to be careful in the presence of DW_AT_specification.
21621 For example, with GCC 3.4, given the code
21625 // Definition of N::foo.
21629 then we'll have a tree of DIEs like this:
21631 1: DW_TAG_compile_unit
21632 2: DW_TAG_namespace // N
21633 3: DW_TAG_subprogram // declaration of N::foo
21634 4: DW_TAG_subprogram // definition of N::foo
21635 DW_AT_specification // refers to die #3
21637 Thus, when processing die #4, we have to pretend that we're in
21638 the context of its DW_AT_specification, namely the contex of die
21641 spec_die
= die_specification (die
, &spec_cu
);
21642 if (spec_die
== NULL
)
21643 parent
= die
->parent
;
21646 parent
= spec_die
->parent
;
21650 if (parent
== NULL
)
21652 else if (parent
->building_fullname
)
21655 const char *parent_name
;
21657 /* It has been seen on RealView 2.2 built binaries,
21658 DW_TAG_template_type_param types actually _defined_ as
21659 children of the parent class:
21662 template class <class Enum> Class{};
21663 Class<enum E> class_e;
21665 1: DW_TAG_class_type (Class)
21666 2: DW_TAG_enumeration_type (E)
21667 3: DW_TAG_enumerator (enum1:0)
21668 3: DW_TAG_enumerator (enum2:1)
21670 2: DW_TAG_template_type_param
21671 DW_AT_type DW_FORM_ref_udata (E)
21673 Besides being broken debug info, it can put GDB into an
21674 infinite loop. Consider:
21676 When we're building the full name for Class<E>, we'll start
21677 at Class, and go look over its template type parameters,
21678 finding E. We'll then try to build the full name of E, and
21679 reach here. We're now trying to build the full name of E,
21680 and look over the parent DIE for containing scope. In the
21681 broken case, if we followed the parent DIE of E, we'd again
21682 find Class, and once again go look at its template type
21683 arguments, etc., etc. Simply don't consider such parent die
21684 as source-level parent of this die (it can't be, the language
21685 doesn't allow it), and break the loop here. */
21686 name
= dwarf2_name (die
, cu
);
21687 parent_name
= dwarf2_name (parent
, cu
);
21688 complaint (_("template param type '%s' defined within parent '%s'"),
21689 name
? name
: "<unknown>",
21690 parent_name
? parent_name
: "<unknown>");
21694 switch (parent
->tag
)
21696 case DW_TAG_namespace
:
21697 parent_type
= read_type_die (parent
, cu
);
21698 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
21699 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
21700 Work around this problem here. */
21701 if (cu
->language
== language_cplus
21702 && strcmp (parent_type
->name (), "::") == 0)
21704 /* We give a name to even anonymous namespaces. */
21705 return parent_type
->name ();
21706 case DW_TAG_class_type
:
21707 case DW_TAG_interface_type
:
21708 case DW_TAG_structure_type
:
21709 case DW_TAG_union_type
:
21710 case DW_TAG_module
:
21711 parent_type
= read_type_die (parent
, cu
);
21712 if (parent_type
->name () != NULL
)
21713 return parent_type
->name ();
21715 /* An anonymous structure is only allowed non-static data
21716 members; no typedefs, no member functions, et cetera.
21717 So it does not need a prefix. */
21719 case DW_TAG_compile_unit
:
21720 case DW_TAG_partial_unit
:
21721 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
21722 if (cu
->language
== language_cplus
21723 && !dwarf2_per_objfile
->per_bfd
->types
.empty ()
21724 && die
->child
!= NULL
21725 && (die
->tag
== DW_TAG_class_type
21726 || die
->tag
== DW_TAG_structure_type
21727 || die
->tag
== DW_TAG_union_type
))
21729 const char *name
= guess_full_die_structure_name (die
, cu
);
21734 case DW_TAG_subprogram
:
21735 /* Nested subroutines in Fortran get a prefix with the name
21736 of the parent's subroutine. */
21737 if (cu
->language
== language_fortran
)
21739 if ((die
->tag
== DW_TAG_subprogram
)
21740 && (dwarf2_name (parent
, cu
) != NULL
))
21741 return dwarf2_name (parent
, cu
);
21743 return determine_prefix (parent
, cu
);
21744 case DW_TAG_enumeration_type
:
21745 parent_type
= read_type_die (parent
, cu
);
21746 if (TYPE_DECLARED_CLASS (parent_type
))
21748 if (parent_type
->name () != NULL
)
21749 return parent_type
->name ();
21752 /* Fall through. */
21754 return determine_prefix (parent
, cu
);
21758 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
21759 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
21760 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
21761 an obconcat, otherwise allocate storage for the result. The CU argument is
21762 used to determine the language and hence, the appropriate separator. */
21764 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
21767 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
21768 int physname
, struct dwarf2_cu
*cu
)
21770 const char *lead
= "";
21773 if (suffix
== NULL
|| suffix
[0] == '\0'
21774 || prefix
== NULL
|| prefix
[0] == '\0')
21776 else if (cu
->language
== language_d
)
21778 /* For D, the 'main' function could be defined in any module, but it
21779 should never be prefixed. */
21780 if (strcmp (suffix
, "D main") == 0)
21788 else if (cu
->language
== language_fortran
&& physname
)
21790 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
21791 DW_AT_MIPS_linkage_name is preferred and used instead. */
21799 if (prefix
== NULL
)
21801 if (suffix
== NULL
)
21808 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
21810 strcpy (retval
, lead
);
21811 strcat (retval
, prefix
);
21812 strcat (retval
, sep
);
21813 strcat (retval
, suffix
);
21818 /* We have an obstack. */
21819 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
21823 /* Get name of a die, return NULL if not found. */
21825 static const char *
21826 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
21827 struct objfile
*objfile
)
21829 if (name
&& cu
->language
== language_cplus
)
21831 gdb::unique_xmalloc_ptr
<char> canon_name
21832 = cp_canonicalize_string (name
);
21834 if (canon_name
!= nullptr)
21835 name
= objfile
->intern (canon_name
.get ());
21841 /* Get name of a die, return NULL if not found.
21842 Anonymous namespaces are converted to their magic string. */
21844 static const char *
21845 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21847 struct attribute
*attr
;
21848 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21850 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
21851 if ((!attr
|| !DW_STRING (attr
))
21852 && die
->tag
!= DW_TAG_namespace
21853 && die
->tag
!= DW_TAG_class_type
21854 && die
->tag
!= DW_TAG_interface_type
21855 && die
->tag
!= DW_TAG_structure_type
21856 && die
->tag
!= DW_TAG_union_type
)
21861 case DW_TAG_compile_unit
:
21862 case DW_TAG_partial_unit
:
21863 /* Compilation units have a DW_AT_name that is a filename, not
21864 a source language identifier. */
21865 case DW_TAG_enumeration_type
:
21866 case DW_TAG_enumerator
:
21867 /* These tags always have simple identifiers already; no need
21868 to canonicalize them. */
21869 return DW_STRING (attr
);
21871 case DW_TAG_namespace
:
21872 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
21873 return DW_STRING (attr
);
21874 return CP_ANONYMOUS_NAMESPACE_STR
;
21876 case DW_TAG_class_type
:
21877 case DW_TAG_interface_type
:
21878 case DW_TAG_structure_type
:
21879 case DW_TAG_union_type
:
21880 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
21881 structures or unions. These were of the form "._%d" in GCC 4.1,
21882 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
21883 and GCC 4.4. We work around this problem by ignoring these. */
21884 if (attr
&& DW_STRING (attr
)
21885 && (startswith (DW_STRING (attr
), "._")
21886 || startswith (DW_STRING (attr
), "<anonymous")))
21889 /* GCC might emit a nameless typedef that has a linkage name. See
21890 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21891 if (!attr
|| DW_STRING (attr
) == NULL
)
21893 attr
= dw2_linkage_name_attr (die
, cu
);
21894 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21897 /* Avoid demangling DW_STRING (attr) the second time on a second
21898 call for the same DIE. */
21899 if (!DW_STRING_IS_CANONICAL (attr
))
21901 gdb::unique_xmalloc_ptr
<char> demangled
21902 (gdb_demangle (DW_STRING (attr
), DMGL_TYPES
));
21903 if (demangled
== nullptr)
21906 DW_STRING (attr
) = objfile
->intern (demangled
.get ());
21907 DW_STRING_IS_CANONICAL (attr
) = 1;
21910 /* Strip any leading namespaces/classes, keep only the base name.
21911 DW_AT_name for named DIEs does not contain the prefixes. */
21912 const char *base
= strrchr (DW_STRING (attr
), ':');
21913 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
21916 return DW_STRING (attr
);
21924 if (!DW_STRING_IS_CANONICAL (attr
))
21926 DW_STRING (attr
) = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
21928 DW_STRING_IS_CANONICAL (attr
) = 1;
21930 return DW_STRING (attr
);
21933 /* Return the die that this die in an extension of, or NULL if there
21934 is none. *EXT_CU is the CU containing DIE on input, and the CU
21935 containing the return value on output. */
21937 static struct die_info
*
21938 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
21940 struct attribute
*attr
;
21942 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
21946 return follow_die_ref (die
, attr
, ext_cu
);
21950 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
21954 print_spaces (indent
, f
);
21955 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
21956 dwarf_tag_name (die
->tag
), die
->abbrev
,
21957 sect_offset_str (die
->sect_off
));
21959 if (die
->parent
!= NULL
)
21961 print_spaces (indent
, f
);
21962 fprintf_unfiltered (f
, " parent at offset: %s\n",
21963 sect_offset_str (die
->parent
->sect_off
));
21966 print_spaces (indent
, f
);
21967 fprintf_unfiltered (f
, " has children: %s\n",
21968 dwarf_bool_name (die
->child
!= NULL
));
21970 print_spaces (indent
, f
);
21971 fprintf_unfiltered (f
, " attributes:\n");
21973 for (i
= 0; i
< die
->num_attrs
; ++i
)
21975 print_spaces (indent
, f
);
21976 fprintf_unfiltered (f
, " %s (%s) ",
21977 dwarf_attr_name (die
->attrs
[i
].name
),
21978 dwarf_form_name (die
->attrs
[i
].form
));
21980 switch (die
->attrs
[i
].form
)
21983 case DW_FORM_addrx
:
21984 case DW_FORM_GNU_addr_index
:
21985 fprintf_unfiltered (f
, "address: ");
21986 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
21988 case DW_FORM_block2
:
21989 case DW_FORM_block4
:
21990 case DW_FORM_block
:
21991 case DW_FORM_block1
:
21992 fprintf_unfiltered (f
, "block: size %s",
21993 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21995 case DW_FORM_exprloc
:
21996 fprintf_unfiltered (f
, "expression: size %s",
21997 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21999 case DW_FORM_data16
:
22000 fprintf_unfiltered (f
, "constant of 16 bytes");
22002 case DW_FORM_ref_addr
:
22003 fprintf_unfiltered (f
, "ref address: ");
22004 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22006 case DW_FORM_GNU_ref_alt
:
22007 fprintf_unfiltered (f
, "alt ref address: ");
22008 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22014 case DW_FORM_ref_udata
:
22015 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22016 (long) (DW_UNSND (&die
->attrs
[i
])));
22018 case DW_FORM_data1
:
22019 case DW_FORM_data2
:
22020 case DW_FORM_data4
:
22021 case DW_FORM_data8
:
22022 case DW_FORM_udata
:
22023 case DW_FORM_sdata
:
22024 fprintf_unfiltered (f
, "constant: %s",
22025 pulongest (DW_UNSND (&die
->attrs
[i
])));
22027 case DW_FORM_sec_offset
:
22028 fprintf_unfiltered (f
, "section offset: %s",
22029 pulongest (DW_UNSND (&die
->attrs
[i
])));
22031 case DW_FORM_ref_sig8
:
22032 fprintf_unfiltered (f
, "signature: %s",
22033 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22035 case DW_FORM_string
:
22037 case DW_FORM_line_strp
:
22039 case DW_FORM_GNU_str_index
:
22040 case DW_FORM_GNU_strp_alt
:
22041 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22042 DW_STRING (&die
->attrs
[i
])
22043 ? DW_STRING (&die
->attrs
[i
]) : "",
22044 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22047 if (DW_UNSND (&die
->attrs
[i
]))
22048 fprintf_unfiltered (f
, "flag: TRUE");
22050 fprintf_unfiltered (f
, "flag: FALSE");
22052 case DW_FORM_flag_present
:
22053 fprintf_unfiltered (f
, "flag: TRUE");
22055 case DW_FORM_indirect
:
22056 /* The reader will have reduced the indirect form to
22057 the "base form" so this form should not occur. */
22058 fprintf_unfiltered (f
,
22059 "unexpected attribute form: DW_FORM_indirect");
22061 case DW_FORM_implicit_const
:
22062 fprintf_unfiltered (f
, "constant: %s",
22063 plongest (DW_SND (&die
->attrs
[i
])));
22066 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22067 die
->attrs
[i
].form
);
22070 fprintf_unfiltered (f
, "\n");
22075 dump_die_for_error (struct die_info
*die
)
22077 dump_die_shallow (gdb_stderr
, 0, die
);
22081 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22083 int indent
= level
* 4;
22085 gdb_assert (die
!= NULL
);
22087 if (level
>= max_level
)
22090 dump_die_shallow (f
, indent
, die
);
22092 if (die
->child
!= NULL
)
22094 print_spaces (indent
, f
);
22095 fprintf_unfiltered (f
, " Children:");
22096 if (level
+ 1 < max_level
)
22098 fprintf_unfiltered (f
, "\n");
22099 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22103 fprintf_unfiltered (f
,
22104 " [not printed, max nesting level reached]\n");
22108 if (die
->sibling
!= NULL
&& level
> 0)
22110 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22114 /* This is called from the pdie macro in gdbinit.in.
22115 It's not static so gcc will keep a copy callable from gdb. */
22118 dump_die (struct die_info
*die
, int max_level
)
22120 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22124 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22128 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22129 to_underlying (die
->sect_off
),
22135 /* Follow reference or signature attribute ATTR of SRC_DIE.
22136 On entry *REF_CU is the CU of SRC_DIE.
22137 On exit *REF_CU is the CU of the result. */
22139 static struct die_info
*
22140 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22141 struct dwarf2_cu
**ref_cu
)
22143 struct die_info
*die
;
22145 if (attr
->form_is_ref ())
22146 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22147 else if (attr
->form
== DW_FORM_ref_sig8
)
22148 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22151 dump_die_for_error (src_die
);
22152 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22153 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22159 /* Follow reference OFFSET.
22160 On entry *REF_CU is the CU of the source die referencing OFFSET.
22161 On exit *REF_CU is the CU of the result.
22162 Returns NULL if OFFSET is invalid. */
22164 static struct die_info
*
22165 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22166 struct dwarf2_cu
**ref_cu
)
22168 struct die_info temp_die
;
22169 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22170 struct dwarf2_per_objfile
*dwarf2_per_objfile
22171 = cu
->per_cu
->dwarf2_per_objfile
;
22173 gdb_assert (cu
->per_cu
!= NULL
);
22177 if (cu
->per_cu
->is_debug_types
)
22179 /* .debug_types CUs cannot reference anything outside their CU.
22180 If they need to, they have to reference a signatured type via
22181 DW_FORM_ref_sig8. */
22182 if (!cu
->header
.offset_in_cu_p (sect_off
))
22185 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22186 || !cu
->header
.offset_in_cu_p (sect_off
))
22188 struct dwarf2_per_cu_data
*per_cu
;
22190 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22191 dwarf2_per_objfile
);
22193 /* If necessary, add it to the queue and load its DIEs. */
22194 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22195 load_full_comp_unit (per_cu
, false, cu
->language
);
22197 target_cu
= per_cu
->cu
;
22199 else if (cu
->dies
== NULL
)
22201 /* We're loading full DIEs during partial symbol reading. */
22202 gdb_assert (dwarf2_per_objfile
->per_bfd
->reading_partial_symbols
);
22203 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
22206 *ref_cu
= target_cu
;
22207 temp_die
.sect_off
= sect_off
;
22209 if (target_cu
!= cu
)
22210 target_cu
->ancestor
= cu
;
22212 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22214 to_underlying (sect_off
));
22217 /* Follow reference attribute ATTR of SRC_DIE.
22218 On entry *REF_CU is the CU of SRC_DIE.
22219 On exit *REF_CU is the CU of the result. */
22221 static struct die_info
*
22222 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22223 struct dwarf2_cu
**ref_cu
)
22225 sect_offset sect_off
= attr
->get_ref_die_offset ();
22226 struct dwarf2_cu
*cu
= *ref_cu
;
22227 struct die_info
*die
;
22229 die
= follow_die_offset (sect_off
,
22230 (attr
->form
== DW_FORM_GNU_ref_alt
22231 || cu
->per_cu
->is_dwz
),
22234 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22235 "at %s [in module %s]"),
22236 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22237 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22244 struct dwarf2_locexpr_baton
22245 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22246 dwarf2_per_cu_data
*per_cu
,
22247 CORE_ADDR (*get_frame_pc
) (void *baton
),
22248 void *baton
, bool resolve_abstract_p
)
22250 struct dwarf2_cu
*cu
;
22251 struct die_info
*die
;
22252 struct attribute
*attr
;
22253 struct dwarf2_locexpr_baton retval
;
22254 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22255 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22257 if (per_cu
->cu
== NULL
)
22258 load_cu (per_cu
, false);
22262 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22263 Instead just throw an error, not much else we can do. */
22264 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22265 sect_offset_str (sect_off
), objfile_name (objfile
));
22268 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22270 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22271 sect_offset_str (sect_off
), objfile_name (objfile
));
22273 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22274 if (!attr
&& resolve_abstract_p
22275 && (dwarf2_per_objfile
->per_bfd
->abstract_to_concrete
.find (die
->sect_off
)
22276 != dwarf2_per_objfile
->per_bfd
->abstract_to_concrete
.end ()))
22278 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22279 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
22280 struct gdbarch
*gdbarch
= objfile
->arch ();
22282 for (const auto &cand_off
22283 : dwarf2_per_objfile
->per_bfd
->abstract_to_concrete
[die
->sect_off
])
22285 struct dwarf2_cu
*cand_cu
= cu
;
22286 struct die_info
*cand
22287 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
22290 || cand
->parent
->tag
!= DW_TAG_subprogram
)
22293 CORE_ADDR pc_low
, pc_high
;
22294 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
22295 if (pc_low
== ((CORE_ADDR
) -1))
22297 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
22298 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
22299 if (!(pc_low
<= pc
&& pc
< pc_high
))
22303 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22310 /* DWARF: "If there is no such attribute, then there is no effect.".
22311 DATA is ignored if SIZE is 0. */
22313 retval
.data
= NULL
;
22316 else if (attr
->form_is_section_offset ())
22318 struct dwarf2_loclist_baton loclist_baton
;
22319 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22322 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22324 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22326 retval
.size
= size
;
22330 if (!attr
->form_is_block ())
22331 error (_("Dwarf Error: DIE at %s referenced in module %s "
22332 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22333 sect_offset_str (sect_off
), objfile_name (objfile
));
22335 retval
.data
= DW_BLOCK (attr
)->data
;
22336 retval
.size
= DW_BLOCK (attr
)->size
;
22338 retval
.per_objfile
= dwarf2_per_objfile
;
22339 retval
.per_cu
= cu
->per_cu
;
22341 age_cached_comp_units (dwarf2_per_objfile
);
22348 struct dwarf2_locexpr_baton
22349 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22350 dwarf2_per_cu_data
*per_cu
,
22351 CORE_ADDR (*get_frame_pc
) (void *baton
),
22354 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22356 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22359 /* Write a constant of a given type as target-ordered bytes into
22362 static const gdb_byte
*
22363 write_constant_as_bytes (struct obstack
*obstack
,
22364 enum bfd_endian byte_order
,
22371 *len
= TYPE_LENGTH (type
);
22372 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22373 store_unsigned_integer (result
, *len
, byte_order
, value
);
22381 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22382 dwarf2_per_cu_data
*per_cu
,
22386 struct dwarf2_cu
*cu
;
22387 struct die_info
*die
;
22388 struct attribute
*attr
;
22389 const gdb_byte
*result
= NULL
;
22392 enum bfd_endian byte_order
;
22393 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22395 if (per_cu
->cu
== NULL
)
22396 load_cu (per_cu
, false);
22400 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22401 Instead just throw an error, not much else we can do. */
22402 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22403 sect_offset_str (sect_off
), objfile_name (objfile
));
22406 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22408 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22409 sect_offset_str (sect_off
), objfile_name (objfile
));
22411 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22415 byte_order
= (bfd_big_endian (objfile
->obfd
)
22416 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22418 switch (attr
->form
)
22421 case DW_FORM_addrx
:
22422 case DW_FORM_GNU_addr_index
:
22426 *len
= cu
->header
.addr_size
;
22427 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22428 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22432 case DW_FORM_string
:
22435 case DW_FORM_GNU_str_index
:
22436 case DW_FORM_GNU_strp_alt
:
22437 /* DW_STRING is already allocated on the objfile obstack, point
22439 result
= (const gdb_byte
*) DW_STRING (attr
);
22440 *len
= strlen (DW_STRING (attr
));
22442 case DW_FORM_block1
:
22443 case DW_FORM_block2
:
22444 case DW_FORM_block4
:
22445 case DW_FORM_block
:
22446 case DW_FORM_exprloc
:
22447 case DW_FORM_data16
:
22448 result
= DW_BLOCK (attr
)->data
;
22449 *len
= DW_BLOCK (attr
)->size
;
22452 /* The DW_AT_const_value attributes are supposed to carry the
22453 symbol's value "represented as it would be on the target
22454 architecture." By the time we get here, it's already been
22455 converted to host endianness, so we just need to sign- or
22456 zero-extend it as appropriate. */
22457 case DW_FORM_data1
:
22458 type
= die_type (die
, cu
);
22459 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
22460 if (result
== NULL
)
22461 result
= write_constant_as_bytes (obstack
, byte_order
,
22464 case DW_FORM_data2
:
22465 type
= die_type (die
, cu
);
22466 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
22467 if (result
== NULL
)
22468 result
= write_constant_as_bytes (obstack
, byte_order
,
22471 case DW_FORM_data4
:
22472 type
= die_type (die
, cu
);
22473 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
22474 if (result
== NULL
)
22475 result
= write_constant_as_bytes (obstack
, byte_order
,
22478 case DW_FORM_data8
:
22479 type
= die_type (die
, cu
);
22480 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
22481 if (result
== NULL
)
22482 result
= write_constant_as_bytes (obstack
, byte_order
,
22486 case DW_FORM_sdata
:
22487 case DW_FORM_implicit_const
:
22488 type
= die_type (die
, cu
);
22489 result
= write_constant_as_bytes (obstack
, byte_order
,
22490 type
, DW_SND (attr
), len
);
22493 case DW_FORM_udata
:
22494 type
= die_type (die
, cu
);
22495 result
= write_constant_as_bytes (obstack
, byte_order
,
22496 type
, DW_UNSND (attr
), len
);
22500 complaint (_("unsupported const value attribute form: '%s'"),
22501 dwarf_form_name (attr
->form
));
22511 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
22512 dwarf2_per_cu_data
*per_cu
)
22514 struct dwarf2_cu
*cu
;
22515 struct die_info
*die
;
22517 if (per_cu
->cu
== NULL
)
22518 load_cu (per_cu
, false);
22523 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22527 return die_type (die
, cu
);
22533 dwarf2_get_die_type (cu_offset die_offset
,
22534 struct dwarf2_per_cu_data
*per_cu
)
22536 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
22537 return get_die_type_at_offset (die_offset_sect
, per_cu
);
22540 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
22541 On entry *REF_CU is the CU of SRC_DIE.
22542 On exit *REF_CU is the CU of the result.
22543 Returns NULL if the referenced DIE isn't found. */
22545 static struct die_info
*
22546 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
22547 struct dwarf2_cu
**ref_cu
)
22549 struct die_info temp_die
;
22550 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
22551 struct die_info
*die
;
22553 /* While it might be nice to assert sig_type->type == NULL here,
22554 we can get here for DW_AT_imported_declaration where we need
22555 the DIE not the type. */
22557 /* If necessary, add it to the queue and load its DIEs. */
22559 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
22560 read_signatured_type (sig_type
);
22562 sig_cu
= sig_type
->per_cu
.cu
;
22563 gdb_assert (sig_cu
!= NULL
);
22564 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
22565 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
22566 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
22567 to_underlying (temp_die
.sect_off
));
22570 struct dwarf2_per_objfile
*dwarf2_per_objfile
22571 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
22573 /* For .gdb_index version 7 keep track of included TUs.
22574 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
22575 if (dwarf2_per_objfile
->per_bfd
->index_table
!= NULL
22576 && dwarf2_per_objfile
->per_bfd
->index_table
->version
<= 7)
22578 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
22583 sig_cu
->ancestor
= cu
;
22591 /* Follow signatured type referenced by ATTR in SRC_DIE.
22592 On entry *REF_CU is the CU of SRC_DIE.
22593 On exit *REF_CU is the CU of the result.
22594 The result is the DIE of the type.
22595 If the referenced type cannot be found an error is thrown. */
22597 static struct die_info
*
22598 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22599 struct dwarf2_cu
**ref_cu
)
22601 ULONGEST signature
= DW_SIGNATURE (attr
);
22602 struct signatured_type
*sig_type
;
22603 struct die_info
*die
;
22605 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
22607 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
22608 /* sig_type will be NULL if the signatured type is missing from
22610 if (sig_type
== NULL
)
22612 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22613 " from DIE at %s [in module %s]"),
22614 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22615 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22618 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
22621 dump_die_for_error (src_die
);
22622 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22623 " from DIE at %s [in module %s]"),
22624 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22625 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22631 /* Get the type specified by SIGNATURE referenced in DIE/CU,
22632 reading in and processing the type unit if necessary. */
22634 static struct type
*
22635 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
22636 struct dwarf2_cu
*cu
)
22638 struct dwarf2_per_objfile
*dwarf2_per_objfile
22639 = cu
->per_cu
->dwarf2_per_objfile
;
22640 struct signatured_type
*sig_type
;
22641 struct dwarf2_cu
*type_cu
;
22642 struct die_info
*type_die
;
22645 sig_type
= lookup_signatured_type (cu
, signature
);
22646 /* sig_type will be NULL if the signatured type is missing from
22648 if (sig_type
== NULL
)
22650 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22651 " from DIE at %s [in module %s]"),
22652 hex_string (signature
), sect_offset_str (die
->sect_off
),
22653 objfile_name (dwarf2_per_objfile
->objfile
));
22654 return build_error_marker_type (cu
, die
);
22657 /* If we already know the type we're done. */
22658 if (sig_type
->type
!= NULL
)
22659 return sig_type
->type
;
22662 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
22663 if (type_die
!= NULL
)
22665 /* N.B. We need to call get_die_type to ensure only one type for this DIE
22666 is created. This is important, for example, because for c++ classes
22667 we need TYPE_NAME set which is only done by new_symbol. Blech. */
22668 type
= read_type_die (type_die
, type_cu
);
22671 complaint (_("Dwarf Error: Cannot build signatured type %s"
22672 " referenced from DIE at %s [in module %s]"),
22673 hex_string (signature
), sect_offset_str (die
->sect_off
),
22674 objfile_name (dwarf2_per_objfile
->objfile
));
22675 type
= build_error_marker_type (cu
, die
);
22680 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22681 " from DIE at %s [in module %s]"),
22682 hex_string (signature
), sect_offset_str (die
->sect_off
),
22683 objfile_name (dwarf2_per_objfile
->objfile
));
22684 type
= build_error_marker_type (cu
, die
);
22686 sig_type
->type
= type
;
22691 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
22692 reading in and processing the type unit if necessary. */
22694 static struct type
*
22695 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
22696 struct dwarf2_cu
*cu
) /* ARI: editCase function */
22698 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
22699 if (attr
->form_is_ref ())
22701 struct dwarf2_cu
*type_cu
= cu
;
22702 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
22704 return read_type_die (type_die
, type_cu
);
22706 else if (attr
->form
== DW_FORM_ref_sig8
)
22708 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
22712 struct dwarf2_per_objfile
*dwarf2_per_objfile
22713 = cu
->per_cu
->dwarf2_per_objfile
;
22715 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
22716 " at %s [in module %s]"),
22717 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
22718 objfile_name (dwarf2_per_objfile
->objfile
));
22719 return build_error_marker_type (cu
, die
);
22723 /* Load the DIEs associated with type unit PER_CU into memory. */
22726 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
22728 struct signatured_type
*sig_type
;
22730 /* Caller is responsible for ensuring type_unit_groups don't get here. */
22731 gdb_assert (! per_cu
->type_unit_group_p ());
22733 /* We have the per_cu, but we need the signatured_type.
22734 Fortunately this is an easy translation. */
22735 gdb_assert (per_cu
->is_debug_types
);
22736 sig_type
= (struct signatured_type
*) per_cu
;
22738 gdb_assert (per_cu
->cu
== NULL
);
22740 read_signatured_type (sig_type
);
22742 gdb_assert (per_cu
->cu
!= NULL
);
22745 /* Read in a signatured type and build its CU and DIEs.
22746 If the type is a stub for the real type in a DWO file,
22747 read in the real type from the DWO file as well. */
22750 read_signatured_type (struct signatured_type
*sig_type
)
22752 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
22754 gdb_assert (per_cu
->is_debug_types
);
22755 gdb_assert (per_cu
->cu
== NULL
);
22757 cutu_reader
reader (per_cu
, NULL
, 0, false);
22759 if (!reader
.dummy_p
)
22761 struct dwarf2_cu
*cu
= reader
.cu
;
22762 const gdb_byte
*info_ptr
= reader
.info_ptr
;
22764 gdb_assert (cu
->die_hash
== NULL
);
22766 htab_create_alloc_ex (cu
->header
.length
/ 12,
22770 &cu
->comp_unit_obstack
,
22771 hashtab_obstack_allocate
,
22772 dummy_obstack_deallocate
);
22774 if (reader
.comp_unit_die
->has_children
)
22775 reader
.comp_unit_die
->child
22776 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
22777 reader
.comp_unit_die
);
22778 cu
->dies
= reader
.comp_unit_die
;
22779 /* comp_unit_die is not stored in die_hash, no need. */
22781 /* We try not to read any attributes in this function, because
22782 not all CUs needed for references have been loaded yet, and
22783 symbol table processing isn't initialized. But we have to
22784 set the CU language, or we won't be able to build types
22785 correctly. Similarly, if we do not read the producer, we can
22786 not apply producer-specific interpretation. */
22787 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
22792 sig_type
->per_cu
.tu_read
= 1;
22795 /* Decode simple location descriptions.
22796 Given a pointer to a dwarf block that defines a location, compute
22797 the location and return the value. If COMPUTED is non-null, it is
22798 set to true to indicate that decoding was successful, and false
22799 otherwise. If COMPUTED is null, then this function may emit a
22803 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
, bool *computed
)
22805 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22807 size_t size
= blk
->size
;
22808 const gdb_byte
*data
= blk
->data
;
22809 CORE_ADDR stack
[64];
22811 unsigned int bytes_read
, unsnd
;
22814 if (computed
!= nullptr)
22820 stack
[++stacki
] = 0;
22859 stack
[++stacki
] = op
- DW_OP_lit0
;
22894 stack
[++stacki
] = op
- DW_OP_reg0
;
22897 if (computed
== nullptr)
22898 dwarf2_complex_location_expr_complaint ();
22905 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
22907 stack
[++stacki
] = unsnd
;
22910 if (computed
== nullptr)
22911 dwarf2_complex_location_expr_complaint ();
22918 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
22923 case DW_OP_const1u
:
22924 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
22928 case DW_OP_const1s
:
22929 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
22933 case DW_OP_const2u
:
22934 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
22938 case DW_OP_const2s
:
22939 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
22943 case DW_OP_const4u
:
22944 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
22948 case DW_OP_const4s
:
22949 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
22953 case DW_OP_const8u
:
22954 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
22959 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
22965 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
22970 stack
[stacki
+ 1] = stack
[stacki
];
22975 stack
[stacki
- 1] += stack
[stacki
];
22979 case DW_OP_plus_uconst
:
22980 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
22986 stack
[stacki
- 1] -= stack
[stacki
];
22991 /* If we're not the last op, then we definitely can't encode
22992 this using GDB's address_class enum. This is valid for partial
22993 global symbols, although the variable's address will be bogus
22997 if (computed
== nullptr)
22998 dwarf2_complex_location_expr_complaint ();
23004 case DW_OP_GNU_push_tls_address
:
23005 case DW_OP_form_tls_address
:
23006 /* The top of the stack has the offset from the beginning
23007 of the thread control block at which the variable is located. */
23008 /* Nothing should follow this operator, so the top of stack would
23010 /* This is valid for partial global symbols, but the variable's
23011 address will be bogus in the psymtab. Make it always at least
23012 non-zero to not look as a variable garbage collected by linker
23013 which have DW_OP_addr 0. */
23016 if (computed
== nullptr)
23017 dwarf2_complex_location_expr_complaint ();
23024 case DW_OP_GNU_uninit
:
23025 if (computed
!= nullptr)
23030 case DW_OP_GNU_addr_index
:
23031 case DW_OP_GNU_const_index
:
23032 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23038 if (computed
== nullptr)
23040 const char *name
= get_DW_OP_name (op
);
23043 complaint (_("unsupported stack op: '%s'"),
23046 complaint (_("unsupported stack op: '%02x'"),
23050 return (stack
[stacki
]);
23053 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23054 outside of the allocated space. Also enforce minimum>0. */
23055 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23057 if (computed
== nullptr)
23058 complaint (_("location description stack overflow"));
23064 if (computed
== nullptr)
23065 complaint (_("location description stack underflow"));
23070 if (computed
!= nullptr)
23072 return (stack
[stacki
]);
23075 /* memory allocation interface */
23077 static struct dwarf_block
*
23078 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23080 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23083 static struct die_info
*
23084 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23086 struct die_info
*die
;
23087 size_t size
= sizeof (struct die_info
);
23090 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23092 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23093 memset (die
, 0, sizeof (struct die_info
));
23099 /* Macro support. */
23101 /* An overload of dwarf_decode_macros that finds the correct section
23102 and ensures it is read in before calling the other overload. */
23105 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
23106 int section_is_gnu
)
23108 struct dwarf2_per_objfile
*dwarf2_per_objfile
23109 = cu
->per_cu
->dwarf2_per_objfile
;
23110 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23111 const struct line_header
*lh
= cu
->line_header
;
23112 unsigned int offset_size
= cu
->header
.offset_size
;
23113 struct dwarf2_section_info
*section
;
23114 const char *section_name
;
23116 if (cu
->dwo_unit
!= nullptr)
23118 if (section_is_gnu
)
23120 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
23121 section_name
= ".debug_macro.dwo";
23125 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
23126 section_name
= ".debug_macinfo.dwo";
23131 if (section_is_gnu
)
23133 section
= &dwarf2_per_objfile
->per_bfd
->macro
;
23134 section_name
= ".debug_macro";
23138 section
= &dwarf2_per_objfile
->per_bfd
->macinfo
;
23139 section_name
= ".debug_macinfo";
23143 section
->read (objfile
);
23144 if (section
->buffer
== nullptr)
23146 complaint (_("missing %s section"), section_name
);
23150 buildsym_compunit
*builder
= cu
->get_builder ();
23152 dwarf_decode_macros (dwarf2_per_objfile
, builder
, section
, lh
,
23153 offset_size
, offset
, section_is_gnu
);
23156 /* Return the .debug_loc section to use for CU.
23157 For DWO files use .debug_loc.dwo. */
23159 static struct dwarf2_section_info
*
23160 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23162 struct dwarf2_per_objfile
*dwarf2_per_objfile
23163 = cu
->per_cu
->dwarf2_per_objfile
;
23167 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23169 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23171 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->per_bfd
->loclists
23172 : &dwarf2_per_objfile
->per_bfd
->loc
);
23175 /* A helper function that fills in a dwarf2_loclist_baton. */
23178 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23179 struct dwarf2_loclist_baton
*baton
,
23180 const struct attribute
*attr
)
23182 struct dwarf2_per_objfile
*dwarf2_per_objfile
23183 = cu
->per_cu
->dwarf2_per_objfile
;
23184 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23186 section
->read (dwarf2_per_objfile
->objfile
);
23188 baton
->per_objfile
= dwarf2_per_objfile
;
23189 baton
->per_cu
= cu
->per_cu
;
23190 gdb_assert (baton
->per_cu
);
23191 /* We don't know how long the location list is, but make sure we
23192 don't run off the edge of the section. */
23193 baton
->size
= section
->size
- DW_UNSND (attr
);
23194 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23195 if (cu
->base_address
.has_value ())
23196 baton
->base_address
= *cu
->base_address
;
23198 baton
->base_address
= 0;
23199 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23203 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
23204 struct dwarf2_cu
*cu
, int is_block
)
23206 struct dwarf2_per_objfile
*dwarf2_per_objfile
23207 = cu
->per_cu
->dwarf2_per_objfile
;
23208 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23209 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23211 if (attr
->form_is_section_offset ()
23212 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
23213 the section. If so, fall through to the complaint in the
23215 && DW_UNSND (attr
) < section
->get_size (objfile
))
23217 struct dwarf2_loclist_baton
*baton
;
23219 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
23221 fill_in_loclist_baton (cu
, baton
, attr
);
23223 if (!cu
->base_address
.has_value ())
23224 complaint (_("Location list used without "
23225 "specifying the CU base address."));
23227 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23228 ? dwarf2_loclist_block_index
23229 : dwarf2_loclist_index
);
23230 SYMBOL_LOCATION_BATON (sym
) = baton
;
23234 struct dwarf2_locexpr_baton
*baton
;
23236 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
23237 baton
->per_objfile
= dwarf2_per_objfile
;
23238 baton
->per_cu
= cu
->per_cu
;
23239 gdb_assert (baton
->per_cu
);
23241 if (attr
->form_is_block ())
23243 /* Note that we're just copying the block's data pointer
23244 here, not the actual data. We're still pointing into the
23245 info_buffer for SYM's objfile; right now we never release
23246 that buffer, but when we do clean up properly this may
23248 baton
->size
= DW_BLOCK (attr
)->size
;
23249 baton
->data
= DW_BLOCK (attr
)->data
;
23253 dwarf2_invalid_attrib_class_complaint ("location description",
23254 sym
->natural_name ());
23258 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23259 ? dwarf2_locexpr_block_index
23260 : dwarf2_locexpr_index
);
23261 SYMBOL_LOCATION_BATON (sym
) = baton
;
23268 dwarf2_per_cu_data::objfile () const
23270 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23272 /* Return the master objfile, so that we can report and look up the
23273 correct file containing this variable. */
23274 if (objfile
->separate_debug_objfile_backlink
)
23275 objfile
= objfile
->separate_debug_objfile_backlink
;
23280 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
23281 (CU_HEADERP is unused in such case) or prepare a temporary copy at
23282 CU_HEADERP first. */
23284 static const struct comp_unit_head
*
23285 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
23286 const struct dwarf2_per_cu_data
*per_cu
)
23288 const gdb_byte
*info_ptr
;
23291 return &per_cu
->cu
->header
;
23293 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
23295 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
23296 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
23297 rcuh_kind::COMPILE
);
23305 dwarf2_per_cu_data::addr_size () const
23307 struct comp_unit_head cu_header_local
;
23308 const struct comp_unit_head
*cu_headerp
;
23310 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23312 return cu_headerp
->addr_size
;
23318 dwarf2_per_cu_data::offset_size () const
23320 struct comp_unit_head cu_header_local
;
23321 const struct comp_unit_head
*cu_headerp
;
23323 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23325 return cu_headerp
->offset_size
;
23331 dwarf2_per_cu_data::ref_addr_size () const
23333 struct comp_unit_head cu_header_local
;
23334 const struct comp_unit_head
*cu_headerp
;
23336 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23338 if (cu_headerp
->version
== 2)
23339 return cu_headerp
->addr_size
;
23341 return cu_headerp
->offset_size
;
23347 dwarf2_per_cu_data::text_offset () const
23349 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23351 return objfile
->text_section_offset ();
23357 dwarf2_per_cu_data::addr_type () const
23359 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23360 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
23361 struct type
*addr_type
= lookup_pointer_type (void_type
);
23362 int addr_size
= this->addr_size ();
23364 if (TYPE_LENGTH (addr_type
) == addr_size
)
23367 addr_type
= addr_sized_int_type (TYPE_UNSIGNED (addr_type
));
23371 /* A helper function for dwarf2_find_containing_comp_unit that returns
23372 the index of the result, and that searches a vector. It will
23373 return a result even if the offset in question does not actually
23374 occur in any CU. This is separate so that it can be unit
23378 dwarf2_find_containing_comp_unit
23379 (sect_offset sect_off
,
23380 unsigned int offset_in_dwz
,
23381 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
23386 high
= all_comp_units
.size () - 1;
23389 struct dwarf2_per_cu_data
*mid_cu
;
23390 int mid
= low
+ (high
- low
) / 2;
23392 mid_cu
= all_comp_units
[mid
];
23393 if (mid_cu
->is_dwz
> offset_in_dwz
23394 || (mid_cu
->is_dwz
== offset_in_dwz
23395 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
23400 gdb_assert (low
== high
);
23404 /* Locate the .debug_info compilation unit from CU's objfile which contains
23405 the DIE at OFFSET. Raises an error on failure. */
23407 static struct dwarf2_per_cu_data
*
23408 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23409 unsigned int offset_in_dwz
,
23410 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23413 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23414 dwarf2_per_objfile
->per_bfd
->all_comp_units
);
23415 struct dwarf2_per_cu_data
*this_cu
23416 = dwarf2_per_objfile
->per_bfd
->all_comp_units
[low
];
23418 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
23420 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23421 error (_("Dwarf Error: could not find partial DIE containing "
23422 "offset %s [in module %s]"),
23423 sect_offset_str (sect_off
),
23424 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
23426 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_comp_units
[low
-1]->sect_off
23428 return dwarf2_per_objfile
->per_bfd
->all_comp_units
[low
-1];
23432 if (low
== dwarf2_per_objfile
->per_bfd
->all_comp_units
.size () - 1
23433 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23434 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
23435 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23442 namespace selftests
{
23443 namespace find_containing_comp_unit
{
23448 struct dwarf2_per_cu_data one
{};
23449 struct dwarf2_per_cu_data two
{};
23450 struct dwarf2_per_cu_data three
{};
23451 struct dwarf2_per_cu_data four
{};
23454 two
.sect_off
= sect_offset (one
.length
);
23459 four
.sect_off
= sect_offset (three
.length
);
23463 std::vector
<dwarf2_per_cu_data
*> units
;
23464 units
.push_back (&one
);
23465 units
.push_back (&two
);
23466 units
.push_back (&three
);
23467 units
.push_back (&four
);
23471 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
23472 SELF_CHECK (units
[result
] == &one
);
23473 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
23474 SELF_CHECK (units
[result
] == &one
);
23475 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
23476 SELF_CHECK (units
[result
] == &two
);
23478 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
23479 SELF_CHECK (units
[result
] == &three
);
23480 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
23481 SELF_CHECK (units
[result
] == &three
);
23482 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
23483 SELF_CHECK (units
[result
] == &four
);
23489 #endif /* GDB_SELF_TEST */
23491 /* Initialize dwarf2_cu CU, owned by PER_CU. */
23493 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
23494 : per_cu (per_cu_
),
23496 has_loclist (false),
23497 checked_producer (false),
23498 producer_is_gxx_lt_4_6 (false),
23499 producer_is_gcc_lt_4_3 (false),
23500 producer_is_icc (false),
23501 producer_is_icc_lt_14 (false),
23502 producer_is_codewarrior (false),
23503 processing_has_namespace_info (false)
23508 /* Destroy a dwarf2_cu. */
23510 dwarf2_cu::~dwarf2_cu ()
23515 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23518 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23519 enum language pretend_language
)
23521 struct attribute
*attr
;
23523 /* Set the language we're debugging. */
23524 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23525 if (attr
!= nullptr)
23526 set_cu_language (DW_UNSND (attr
), cu
);
23529 cu
->language
= pretend_language
;
23530 cu
->language_defn
= language_def (cu
->language
);
23533 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23536 /* Increase the age counter on each cached compilation unit, and free
23537 any that are too old. */
23540 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23542 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23544 dwarf2_clear_marks (dwarf2_per_objfile
->per_bfd
->read_in_chain
);
23545 per_cu
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23546 while (per_cu
!= NULL
)
23548 per_cu
->cu
->last_used
++;
23549 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23550 dwarf2_mark (per_cu
->cu
);
23551 per_cu
= per_cu
->cu
->read_in_chain
;
23554 per_cu
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23555 last_chain
= &dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23556 while (per_cu
!= NULL
)
23558 struct dwarf2_per_cu_data
*next_cu
;
23560 next_cu
= per_cu
->cu
->read_in_chain
;
23562 if (!per_cu
->cu
->mark
)
23565 *last_chain
= next_cu
;
23568 last_chain
= &per_cu
->cu
->read_in_chain
;
23574 /* Remove a single compilation unit from the cache. */
23577 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
23579 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23580 struct dwarf2_per_objfile
*dwarf2_per_objfile
23581 = target_per_cu
->dwarf2_per_objfile
;
23583 per_cu
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23584 last_chain
= &dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23585 while (per_cu
!= NULL
)
23587 struct dwarf2_per_cu_data
*next_cu
;
23589 next_cu
= per_cu
->cu
->read_in_chain
;
23591 if (per_cu
== target_per_cu
)
23595 *last_chain
= next_cu
;
23599 last_chain
= &per_cu
->cu
->read_in_chain
;
23605 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23606 We store these in a hash table separate from the DIEs, and preserve them
23607 when the DIEs are flushed out of cache.
23609 The CU "per_cu" pointer is needed because offset alone is not enough to
23610 uniquely identify the type. A file may have multiple .debug_types sections,
23611 or the type may come from a DWO file. Furthermore, while it's more logical
23612 to use per_cu->section+offset, with Fission the section with the data is in
23613 the DWO file but we don't know that section at the point we need it.
23614 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23615 because we can enter the lookup routine, get_die_type_at_offset, from
23616 outside this file, and thus won't necessarily have PER_CU->cu.
23617 Fortunately, PER_CU is stable for the life of the objfile. */
23619 struct dwarf2_per_cu_offset_and_type
23621 const struct dwarf2_per_cu_data
*per_cu
;
23622 sect_offset sect_off
;
23626 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23629 per_cu_offset_and_type_hash (const void *item
)
23631 const struct dwarf2_per_cu_offset_and_type
*ofs
23632 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23634 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23637 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23640 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23642 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23643 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23644 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23645 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23647 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23648 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23651 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23652 table if necessary. For convenience, return TYPE.
23654 The DIEs reading must have careful ordering to:
23655 * Not cause infinite loops trying to read in DIEs as a prerequisite for
23656 reading current DIE.
23657 * Not trying to dereference contents of still incompletely read in types
23658 while reading in other DIEs.
23659 * Enable referencing still incompletely read in types just by a pointer to
23660 the type without accessing its fields.
23662 Therefore caller should follow these rules:
23663 * Try to fetch any prerequisite types we may need to build this DIE type
23664 before building the type and calling set_die_type.
23665 * After building type call set_die_type for current DIE as soon as
23666 possible before fetching more types to complete the current type.
23667 * Make the type as complete as possible before fetching more types. */
23669 static struct type
*
23670 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23672 struct dwarf2_per_objfile
*dwarf2_per_objfile
23673 = cu
->per_cu
->dwarf2_per_objfile
;
23674 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23675 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23676 struct attribute
*attr
;
23677 struct dynamic_prop prop
;
23679 /* For Ada types, make sure that the gnat-specific data is always
23680 initialized (if not already set). There are a few types where
23681 we should not be doing so, because the type-specific area is
23682 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23683 where the type-specific area is used to store the floatformat).
23684 But this is not a problem, because the gnat-specific information
23685 is actually not needed for these types. */
23686 if (need_gnat_info (cu
)
23687 && type
->code () != TYPE_CODE_FUNC
23688 && type
->code () != TYPE_CODE_FLT
23689 && type
->code () != TYPE_CODE_METHODPTR
23690 && type
->code () != TYPE_CODE_MEMBERPTR
23691 && type
->code () != TYPE_CODE_METHOD
23692 && !HAVE_GNAT_AUX_INFO (type
))
23693 INIT_GNAT_SPECIFIC (type
);
23695 /* Read DW_AT_allocated and set in type. */
23696 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23697 if (attr
!= NULL
&& attr
->form_is_block ())
23699 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23700 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23701 type
->add_dyn_prop (DYN_PROP_ALLOCATED
, prop
);
23703 else if (attr
!= NULL
)
23705 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
23706 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23707 sect_offset_str (die
->sect_off
));
23710 /* Read DW_AT_associated and set in type. */
23711 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23712 if (attr
!= NULL
&& attr
->form_is_block ())
23714 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23715 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23716 type
->add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
);
23718 else if (attr
!= NULL
)
23720 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
23721 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23722 sect_offset_str (die
->sect_off
));
23725 /* Read DW_AT_data_location and set in type. */
23726 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23727 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
23728 cu
->per_cu
->addr_type ()))
23729 type
->add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
);
23731 if (dwarf2_per_objfile
->per_bfd
->die_type_hash
== NULL
)
23732 dwarf2_per_objfile
->per_bfd
->die_type_hash
23733 = htab_up (htab_create_alloc (127,
23734 per_cu_offset_and_type_hash
,
23735 per_cu_offset_and_type_eq
,
23736 NULL
, xcalloc
, xfree
));
23738 ofs
.per_cu
= cu
->per_cu
;
23739 ofs
.sect_off
= die
->sect_off
;
23741 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23742 htab_find_slot (dwarf2_per_objfile
->per_bfd
->die_type_hash
.get (), &ofs
, INSERT
);
23744 complaint (_("A problem internal to GDB: DIE %s has type already set"),
23745 sect_offset_str (die
->sect_off
));
23746 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23747 struct dwarf2_per_cu_offset_and_type
);
23752 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23753 or return NULL if the die does not have a saved type. */
23755 static struct type
*
23756 get_die_type_at_offset (sect_offset sect_off
,
23757 struct dwarf2_per_cu_data
*per_cu
)
23759 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23760 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23762 if (dwarf2_per_objfile
->per_bfd
->die_type_hash
== NULL
)
23765 ofs
.per_cu
= per_cu
;
23766 ofs
.sect_off
= sect_off
;
23767 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23768 htab_find (dwarf2_per_objfile
->per_bfd
->die_type_hash
.get (), &ofs
));
23775 /* Look up the type for DIE in CU in die_type_hash,
23776 or return NULL if DIE does not have a saved type. */
23778 static struct type
*
23779 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23781 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
23784 /* Add a dependence relationship from CU to REF_PER_CU. */
23787 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23788 struct dwarf2_per_cu_data
*ref_per_cu
)
23792 if (cu
->dependencies
== NULL
)
23794 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23795 NULL
, &cu
->comp_unit_obstack
,
23796 hashtab_obstack_allocate
,
23797 dummy_obstack_deallocate
);
23799 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23801 *slot
= ref_per_cu
;
23804 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23805 Set the mark field in every compilation unit in the
23806 cache that we must keep because we are keeping CU. */
23809 dwarf2_mark_helper (void **slot
, void *data
)
23811 struct dwarf2_per_cu_data
*per_cu
;
23813 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23815 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23816 reading of the chain. As such dependencies remain valid it is not much
23817 useful to track and undo them during QUIT cleanups. */
23818 if (per_cu
->cu
== NULL
)
23821 if (per_cu
->cu
->mark
)
23823 per_cu
->cu
->mark
= true;
23825 if (per_cu
->cu
->dependencies
!= NULL
)
23826 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23831 /* Set the mark field in CU and in every other compilation unit in the
23832 cache that we must keep because we are keeping CU. */
23835 dwarf2_mark (struct dwarf2_cu
*cu
)
23840 if (cu
->dependencies
!= NULL
)
23841 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23845 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23849 per_cu
->cu
->mark
= false;
23850 per_cu
= per_cu
->cu
->read_in_chain
;
23854 /* Trivial hash function for partial_die_info: the hash value of a DIE
23855 is its offset in .debug_info for this objfile. */
23858 partial_die_hash (const void *item
)
23860 const struct partial_die_info
*part_die
23861 = (const struct partial_die_info
*) item
;
23863 return to_underlying (part_die
->sect_off
);
23866 /* Trivial comparison function for partial_die_info structures: two DIEs
23867 are equal if they have the same offset. */
23870 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23872 const struct partial_die_info
*part_die_lhs
23873 = (const struct partial_die_info
*) item_lhs
;
23874 const struct partial_die_info
*part_die_rhs
23875 = (const struct partial_die_info
*) item_rhs
;
23877 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23880 struct cmd_list_element
*set_dwarf_cmdlist
;
23881 struct cmd_list_element
*show_dwarf_cmdlist
;
23884 show_check_physname (struct ui_file
*file
, int from_tty
,
23885 struct cmd_list_element
*c
, const char *value
)
23887 fprintf_filtered (file
,
23888 _("Whether to check \"physname\" is %s.\n"),
23892 void _initialize_dwarf2_read ();
23894 _initialize_dwarf2_read ()
23896 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
23897 Set DWARF specific variables.\n\
23898 Configure DWARF variables such as the cache size."),
23899 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23900 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23902 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
23903 Show DWARF specific variables.\n\
23904 Show DWARF variables such as the cache size."),
23905 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23906 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23908 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23909 &dwarf_max_cache_age
, _("\
23910 Set the upper bound on the age of cached DWARF compilation units."), _("\
23911 Show the upper bound on the age of cached DWARF compilation units."), _("\
23912 A higher limit means that cached compilation units will be stored\n\
23913 in memory longer, and more total memory will be used. Zero disables\n\
23914 caching, which can slow down startup."),
23916 show_dwarf_max_cache_age
,
23917 &set_dwarf_cmdlist
,
23918 &show_dwarf_cmdlist
);
23920 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23921 Set debugging of the DWARF reader."), _("\
23922 Show debugging of the DWARF reader."), _("\
23923 When enabled (non-zero), debugging messages are printed during DWARF\n\
23924 reading and symtab expansion. A value of 1 (one) provides basic\n\
23925 information. A value greater than 1 provides more verbose information."),
23928 &setdebuglist
, &showdebuglist
);
23930 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23931 Set debugging of the DWARF DIE reader."), _("\
23932 Show debugging of the DWARF DIE reader."), _("\
23933 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23934 The value is the maximum depth to print."),
23937 &setdebuglist
, &showdebuglist
);
23939 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23940 Set debugging of the dwarf line reader."), _("\
23941 Show debugging of the dwarf line reader."), _("\
23942 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23943 A value of 1 (one) provides basic information.\n\
23944 A value greater than 1 provides more verbose information."),
23947 &setdebuglist
, &showdebuglist
);
23949 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23950 Set cross-checking of \"physname\" code against demangler."), _("\
23951 Show cross-checking of \"physname\" code against demangler."), _("\
23952 When enabled, GDB's internal \"physname\" code is checked against\n\
23954 NULL
, show_check_physname
,
23955 &setdebuglist
, &showdebuglist
);
23957 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23958 no_class
, &use_deprecated_index_sections
, _("\
23959 Set whether to use deprecated gdb_index sections."), _("\
23960 Show whether to use deprecated gdb_index sections."), _("\
23961 When enabled, deprecated .gdb_index sections are used anyway.\n\
23962 Normally they are ignored either because of a missing feature or\n\
23963 performance issue.\n\
23964 Warning: This option must be enabled before gdb reads the file."),
23967 &setlist
, &showlist
);
23969 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23970 &dwarf2_locexpr_funcs
);
23971 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23972 &dwarf2_loclist_funcs
);
23974 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23975 &dwarf2_block_frame_base_locexpr_funcs
);
23976 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23977 &dwarf2_block_frame_base_loclist_funcs
);
23980 selftests::register_test ("dw2_expand_symtabs_matching",
23981 selftests::dw2_expand_symtabs_matching::run_test
);
23982 selftests::register_test ("dwarf2_find_containing_comp_unit",
23983 selftests::find_containing_comp_unit::run_test
);