1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2017 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. */
40 #include "gdb-demangle.h"
41 #include "expression.h"
42 #include "filenames.h" /* for DOSish file names */
45 #include "complaints.h"
47 #include "dwarf2expr.h"
48 #include "dwarf2loc.h"
49 #include "cp-support.h"
55 #include "typeprint.h"
58 #include "completer.h"
63 #include "gdbcore.h" /* for gnutarget */
64 #include "gdb/gdb-index.h"
69 #include "filestuff.h"
71 #include "namespace.h"
72 #include "common/gdb_unlinker.h"
73 #include "common/function-view.h"
74 #include "common/gdb_optional.h"
75 #include "common/underlying.h"
76 #include "common/byte-vector.h"
77 #include "filename-seen-cache.h"
80 #include <sys/types.h>
82 #include <unordered_set>
83 #include <unordered_map>
86 /* When == 1, print basic high level tracing messages.
87 When > 1, be more verbose.
88 This is in contrast to the low level DIE reading of dwarf_die_debug. */
89 static unsigned int dwarf_read_debug
= 0;
91 /* When non-zero, dump DIEs after they are read in. */
92 static unsigned int dwarf_die_debug
= 0;
94 /* When non-zero, dump line number entries as they are read in. */
95 static unsigned int dwarf_line_debug
= 0;
97 /* When non-zero, cross-check physname against demangler. */
98 static int check_physname
= 0;
100 /* When non-zero, do not reject deprecated .gdb_index sections. */
101 static int use_deprecated_index_sections
= 0;
103 static const struct objfile_data
*dwarf2_objfile_data_key
;
105 /* The "aclass" indices for various kinds of computed DWARF symbols. */
107 static int dwarf2_locexpr_index
;
108 static int dwarf2_loclist_index
;
109 static int dwarf2_locexpr_block_index
;
110 static int dwarf2_loclist_block_index
;
112 /* A descriptor for dwarf sections.
114 S.ASECTION, SIZE are typically initialized when the objfile is first
115 scanned. BUFFER, READIN are filled in later when the section is read.
116 If the section contained compressed data then SIZE is updated to record
117 the uncompressed size of the section.
119 DWP file format V2 introduces a wrinkle that is easiest to handle by
120 creating the concept of virtual sections contained within a real section.
121 In DWP V2 the sections of the input DWO files are concatenated together
122 into one section, but section offsets are kept relative to the original
124 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
125 the real section this "virtual" section is contained in, and BUFFER,SIZE
126 describe the virtual section. */
128 struct dwarf2_section_info
132 /* If this is a real section, the bfd section. */
134 /* If this is a virtual section, pointer to the containing ("real")
136 struct dwarf2_section_info
*containing_section
;
138 /* Pointer to section data, only valid if readin. */
139 const gdb_byte
*buffer
;
140 /* The size of the section, real or virtual. */
142 /* If this is a virtual section, the offset in the real section.
143 Only valid if is_virtual. */
144 bfd_size_type virtual_offset
;
145 /* True if we have tried to read this section. */
147 /* True if this is a virtual section, False otherwise.
148 This specifies which of s.section and s.containing_section to use. */
152 typedef struct dwarf2_section_info dwarf2_section_info_def
;
153 DEF_VEC_O (dwarf2_section_info_def
);
155 /* All offsets in the index are of this type. It must be
156 architecture-independent. */
157 typedef uint32_t offset_type
;
159 DEF_VEC_I (offset_type
);
161 /* Ensure only legit values are used. */
162 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
164 gdb_assert ((unsigned int) (value) <= 1); \
165 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
168 /* Ensure only legit values are used. */
169 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
171 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
172 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
173 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
176 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
177 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
179 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
180 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
185 /* Convert VALUE between big- and little-endian. */
188 byte_swap (offset_type value
)
192 result
= (value
& 0xff) << 24;
193 result
|= (value
& 0xff00) << 8;
194 result
|= (value
& 0xff0000) >> 8;
195 result
|= (value
& 0xff000000) >> 24;
199 #define MAYBE_SWAP(V) byte_swap (V)
202 #define MAYBE_SWAP(V) static_cast<offset_type> (V)
203 #endif /* WORDS_BIGENDIAN */
205 /* An index into a (C++) symbol name component in a symbol name as
206 recorded in the mapped_index's symbol table. For each C++ symbol
207 in the symbol table, we record one entry for the start of each
208 component in the symbol in a table of name components, and then
209 sort the table, in order to be able to binary search symbol names,
210 ignoring leading namespaces, both completion and regular look up.
211 For example, for symbol "A::B::C", we'll have an entry that points
212 to "A::B::C", another that points to "B::C", and another for "C".
213 Note that function symbols in GDB index have no parameter
214 information, just the function/method names. You can convert a
215 name_component to a "const char *" using the
216 'mapped_index::symbol_name_at(offset_type)' method. */
218 struct name_component
220 /* Offset in the symbol name where the component starts. Stored as
221 a (32-bit) offset instead of a pointer to save memory and improve
222 locality on 64-bit architectures. */
223 offset_type name_offset
;
225 /* The symbol's index in the symbol and constant pool tables of a
230 /* A description of the mapped index. The file format is described in
231 a comment by the code that writes the index. */
234 /* Index data format version. */
237 /* The total length of the buffer. */
240 /* A pointer to the address table data. */
241 const gdb_byte
*address_table
;
243 /* Size of the address table data in bytes. */
244 offset_type address_table_size
;
246 /* The symbol table, implemented as a hash table. */
247 const offset_type
*symbol_table
;
249 /* Size in slots, each slot is 2 offset_types. */
250 offset_type symbol_table_slots
;
252 /* A pointer to the constant pool. */
253 const char *constant_pool
;
255 /* The name_component table (a sorted vector). See name_component's
256 description above. */
257 std::vector
<name_component
> name_components
;
259 /* How NAME_COMPONENTS is sorted. */
260 enum case_sensitivity name_components_casing
;
262 /* Convenience method to get at the name of the symbol at IDX in the
264 const char *symbol_name_at (offset_type idx
) const
265 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
]); }
267 /* Build the symbol name component sorted vector, if we haven't
269 void build_name_components ();
271 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
272 possible matches for LN_NO_PARAMS in the name component
274 std::pair
<std::vector
<name_component
>::const_iterator
,
275 std::vector
<name_component
>::const_iterator
>
276 find_name_components_bounds (const lookup_name_info
&ln_no_params
) const;
279 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
280 DEF_VEC_P (dwarf2_per_cu_ptr
);
284 int nr_uniq_abbrev_tables
;
286 int nr_symtab_sharers
;
287 int nr_stmt_less_type_units
;
288 int nr_all_type_units_reallocs
;
291 /* Collection of data recorded per objfile.
292 This hangs off of dwarf2_objfile_data_key. */
294 struct dwarf2_per_objfile
296 /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the
297 dwarf2 section names, or is NULL if the standard ELF names are
299 dwarf2_per_objfile (struct objfile
*objfile
,
300 const dwarf2_debug_sections
*names
);
302 ~dwarf2_per_objfile ();
304 DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile
);
306 /* Free all cached compilation units. */
307 void free_cached_comp_units ();
309 /* This function is mapped across the sections and remembers the
310 offset and size of each of the debugging sections we are
312 void locate_sections (bfd
*abfd
, asection
*sectp
,
313 const dwarf2_debug_sections
&names
);
316 dwarf2_section_info info
{};
317 dwarf2_section_info abbrev
{};
318 dwarf2_section_info line
{};
319 dwarf2_section_info loc
{};
320 dwarf2_section_info loclists
{};
321 dwarf2_section_info macinfo
{};
322 dwarf2_section_info macro
{};
323 dwarf2_section_info str
{};
324 dwarf2_section_info line_str
{};
325 dwarf2_section_info ranges
{};
326 dwarf2_section_info rnglists
{};
327 dwarf2_section_info addr
{};
328 dwarf2_section_info frame
{};
329 dwarf2_section_info eh_frame
{};
330 dwarf2_section_info gdb_index
{};
332 VEC (dwarf2_section_info_def
) *types
= NULL
;
335 struct objfile
*objfile
= NULL
;
337 /* Table of all the compilation units. This is used to locate
338 the target compilation unit of a particular reference. */
339 struct dwarf2_per_cu_data
**all_comp_units
= NULL
;
341 /* The number of compilation units in ALL_COMP_UNITS. */
342 int n_comp_units
= 0;
344 /* The number of .debug_types-related CUs. */
345 int n_type_units
= 0;
347 /* The number of elements allocated in all_type_units.
348 If there are skeleton-less TUs, we add them to all_type_units lazily. */
349 int n_allocated_type_units
= 0;
351 /* The .debug_types-related CUs (TUs).
352 This is stored in malloc space because we may realloc it. */
353 struct signatured_type
**all_type_units
= NULL
;
355 /* Table of struct type_unit_group objects.
356 The hash key is the DW_AT_stmt_list value. */
357 htab_t type_unit_groups
{};
359 /* A table mapping .debug_types signatures to its signatured_type entry.
360 This is NULL if the .debug_types section hasn't been read in yet. */
361 htab_t signatured_types
{};
363 /* Type unit statistics, to see how well the scaling improvements
365 struct tu_stats tu_stats
{};
367 /* A chain of compilation units that are currently read in, so that
368 they can be freed later. */
369 dwarf2_per_cu_data
*read_in_chain
= NULL
;
371 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
372 This is NULL if the table hasn't been allocated yet. */
375 /* True if we've checked for whether there is a DWP file. */
376 bool dwp_checked
= false;
378 /* The DWP file if there is one, or NULL. */
379 struct dwp_file
*dwp_file
= NULL
;
381 /* The shared '.dwz' file, if one exists. This is used when the
382 original data was compressed using 'dwz -m'. */
383 struct dwz_file
*dwz_file
= NULL
;
385 /* A flag indicating whether this objfile has a section loaded at a
387 bool has_section_at_zero
= false;
389 /* True if we are using the mapped index,
390 or we are faking it for OBJF_READNOW's sake. */
391 bool using_index
= false;
393 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
394 mapped_index
*index_table
= NULL
;
396 /* When using index_table, this keeps track of all quick_file_names entries.
397 TUs typically share line table entries with a CU, so we maintain a
398 separate table of all line table entries to support the sharing.
399 Note that while there can be way more TUs than CUs, we've already
400 sorted all the TUs into "type unit groups", grouped by their
401 DW_AT_stmt_list value. Therefore the only sharing done here is with a
402 CU and its associated TU group if there is one. */
403 htab_t quick_file_names_table
{};
405 /* Set during partial symbol reading, to prevent queueing of full
407 bool reading_partial_symbols
= false;
409 /* Table mapping type DIEs to their struct type *.
410 This is NULL if not allocated yet.
411 The mapping is done via (CU/TU + DIE offset) -> type. */
412 htab_t die_type_hash
{};
414 /* The CUs we recently read. */
415 VEC (dwarf2_per_cu_ptr
) *just_read_cus
= NULL
;
417 /* Table containing line_header indexed by offset and offset_in_dwz. */
418 htab_t line_header_hash
{};
420 /* Table containing all filenames. This is an optional because the
421 table is lazily constructed on first access. */
422 gdb::optional
<filename_seen_cache
> filenames_cache
;
425 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
427 /* Default names of the debugging sections. */
429 /* Note that if the debugging section has been compressed, it might
430 have a name like .zdebug_info. */
432 static const struct dwarf2_debug_sections dwarf2_elf_names
=
434 { ".debug_info", ".zdebug_info" },
435 { ".debug_abbrev", ".zdebug_abbrev" },
436 { ".debug_line", ".zdebug_line" },
437 { ".debug_loc", ".zdebug_loc" },
438 { ".debug_loclists", ".zdebug_loclists" },
439 { ".debug_macinfo", ".zdebug_macinfo" },
440 { ".debug_macro", ".zdebug_macro" },
441 { ".debug_str", ".zdebug_str" },
442 { ".debug_line_str", ".zdebug_line_str" },
443 { ".debug_ranges", ".zdebug_ranges" },
444 { ".debug_rnglists", ".zdebug_rnglists" },
445 { ".debug_types", ".zdebug_types" },
446 { ".debug_addr", ".zdebug_addr" },
447 { ".debug_frame", ".zdebug_frame" },
448 { ".eh_frame", NULL
},
449 { ".gdb_index", ".zgdb_index" },
453 /* List of DWO/DWP sections. */
455 static const struct dwop_section_names
457 struct dwarf2_section_names abbrev_dwo
;
458 struct dwarf2_section_names info_dwo
;
459 struct dwarf2_section_names line_dwo
;
460 struct dwarf2_section_names loc_dwo
;
461 struct dwarf2_section_names loclists_dwo
;
462 struct dwarf2_section_names macinfo_dwo
;
463 struct dwarf2_section_names macro_dwo
;
464 struct dwarf2_section_names str_dwo
;
465 struct dwarf2_section_names str_offsets_dwo
;
466 struct dwarf2_section_names types_dwo
;
467 struct dwarf2_section_names cu_index
;
468 struct dwarf2_section_names tu_index
;
472 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
473 { ".debug_info.dwo", ".zdebug_info.dwo" },
474 { ".debug_line.dwo", ".zdebug_line.dwo" },
475 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
476 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
477 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
478 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
479 { ".debug_str.dwo", ".zdebug_str.dwo" },
480 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
481 { ".debug_types.dwo", ".zdebug_types.dwo" },
482 { ".debug_cu_index", ".zdebug_cu_index" },
483 { ".debug_tu_index", ".zdebug_tu_index" },
486 /* local data types */
488 /* The data in a compilation unit header, after target2host
489 translation, looks like this. */
490 struct comp_unit_head
494 unsigned char addr_size
;
495 unsigned char signed_addr_p
;
496 sect_offset abbrev_sect_off
;
498 /* Size of file offsets; either 4 or 8. */
499 unsigned int offset_size
;
501 /* Size of the length field; either 4 or 12. */
502 unsigned int initial_length_size
;
504 enum dwarf_unit_type unit_type
;
506 /* Offset to the first byte of this compilation unit header in the
507 .debug_info section, for resolving relative reference dies. */
508 sect_offset sect_off
;
510 /* Offset to first die in this cu from the start of the cu.
511 This will be the first byte following the compilation unit header. */
512 cu_offset first_die_cu_offset
;
514 /* 64-bit signature of this type unit - it is valid only for
515 UNIT_TYPE DW_UT_type. */
518 /* For types, offset in the type's DIE of the type defined by this TU. */
519 cu_offset type_cu_offset_in_tu
;
522 /* Type used for delaying computation of method physnames.
523 See comments for compute_delayed_physnames. */
524 struct delayed_method_info
526 /* The type to which the method is attached, i.e., its parent class. */
529 /* The index of the method in the type's function fieldlists. */
532 /* The index of the method in the fieldlist. */
535 /* The name of the DIE. */
538 /* The DIE associated with this method. */
539 struct die_info
*die
;
542 typedef struct delayed_method_info delayed_method_info
;
543 DEF_VEC_O (delayed_method_info
);
545 /* Internal state when decoding a particular compilation unit. */
548 /* The objfile containing this compilation unit. */
549 struct objfile
*objfile
;
551 /* The header of the compilation unit. */
552 struct comp_unit_head header
;
554 /* Base address of this compilation unit. */
555 CORE_ADDR base_address
;
557 /* Non-zero if base_address has been set. */
560 /* The language we are debugging. */
561 enum language language
;
562 const struct language_defn
*language_defn
;
564 const char *producer
;
566 /* The generic symbol table building routines have separate lists for
567 file scope symbols and all all other scopes (local scopes). So
568 we need to select the right one to pass to add_symbol_to_list().
569 We do it by keeping a pointer to the correct list in list_in_scope.
571 FIXME: The original dwarf code just treated the file scope as the
572 first local scope, and all other local scopes as nested local
573 scopes, and worked fine. Check to see if we really need to
574 distinguish these in buildsym.c. */
575 struct pending
**list_in_scope
;
577 /* The abbrev table for this CU.
578 Normally this points to the abbrev table in the objfile.
579 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
580 struct abbrev_table
*abbrev_table
;
582 /* Hash table holding all the loaded partial DIEs
583 with partial_die->offset.SECT_OFF as hash. */
586 /* Storage for things with the same lifetime as this read-in compilation
587 unit, including partial DIEs. */
588 struct obstack comp_unit_obstack
;
590 /* When multiple dwarf2_cu structures are living in memory, this field
591 chains them all together, so that they can be released efficiently.
592 We will probably also want a generation counter so that most-recently-used
593 compilation units are cached... */
594 struct dwarf2_per_cu_data
*read_in_chain
;
596 /* Backlink to our per_cu entry. */
597 struct dwarf2_per_cu_data
*per_cu
;
599 /* How many compilation units ago was this CU last referenced? */
602 /* A hash table of DIE cu_offset for following references with
603 die_info->offset.sect_off as hash. */
606 /* Full DIEs if read in. */
607 struct die_info
*dies
;
609 /* A set of pointers to dwarf2_per_cu_data objects for compilation
610 units referenced by this one. Only set during full symbol processing;
611 partial symbol tables do not have dependencies. */
614 /* Header data from the line table, during full symbol processing. */
615 struct line_header
*line_header
;
616 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
617 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
618 this is the DW_TAG_compile_unit die for this CU. We'll hold on
619 to the line header as long as this DIE is being processed. See
620 process_die_scope. */
621 die_info
*line_header_die_owner
;
623 /* A list of methods which need to have physnames computed
624 after all type information has been read. */
625 VEC (delayed_method_info
) *method_list
;
627 /* To be copied to symtab->call_site_htab. */
628 htab_t call_site_htab
;
630 /* Non-NULL if this CU came from a DWO file.
631 There is an invariant here that is important to remember:
632 Except for attributes copied from the top level DIE in the "main"
633 (or "stub") file in preparation for reading the DWO file
634 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
635 Either there isn't a DWO file (in which case this is NULL and the point
636 is moot), or there is and either we're not going to read it (in which
637 case this is NULL) or there is and we are reading it (in which case this
639 struct dwo_unit
*dwo_unit
;
641 /* The DW_AT_addr_base attribute if present, zero otherwise
642 (zero is a valid value though).
643 Note this value comes from the Fission stub CU/TU's DIE. */
646 /* The DW_AT_ranges_base attribute if present, zero otherwise
647 (zero is a valid value though).
648 Note this value comes from the Fission stub CU/TU's DIE.
649 Also note that the value is zero in the non-DWO case so this value can
650 be used without needing to know whether DWO files are in use or not.
651 N.B. This does not apply to DW_AT_ranges appearing in
652 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
653 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
654 DW_AT_ranges_base *would* have to be applied, and we'd have to care
655 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
656 ULONGEST ranges_base
;
658 /* Mark used when releasing cached dies. */
659 unsigned int mark
: 1;
661 /* This CU references .debug_loc. See the symtab->locations_valid field.
662 This test is imperfect as there may exist optimized debug code not using
663 any location list and still facing inlining issues if handled as
664 unoptimized code. For a future better test see GCC PR other/32998. */
665 unsigned int has_loclist
: 1;
667 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
668 if all the producer_is_* fields are valid. This information is cached
669 because profiling CU expansion showed excessive time spent in
670 producer_is_gxx_lt_4_6. */
671 unsigned int checked_producer
: 1;
672 unsigned int producer_is_gxx_lt_4_6
: 1;
673 unsigned int producer_is_gcc_lt_4_3
: 1;
674 unsigned int producer_is_icc_lt_14
: 1;
676 /* When set, the file that we're processing is known to have
677 debugging info for C++ namespaces. GCC 3.3.x did not produce
678 this information, but later versions do. */
680 unsigned int processing_has_namespace_info
: 1;
683 /* Persistent data held for a compilation unit, even when not
684 processing it. We put a pointer to this structure in the
685 read_symtab_private field of the psymtab. */
687 struct dwarf2_per_cu_data
689 /* The start offset and length of this compilation unit.
690 NOTE: Unlike comp_unit_head.length, this length includes
692 If the DIE refers to a DWO file, this is always of the original die,
694 sect_offset sect_off
;
697 /* DWARF standard version this data has been read from (such as 4 or 5). */
700 /* Flag indicating this compilation unit will be read in before
701 any of the current compilation units are processed. */
702 unsigned int queued
: 1;
704 /* This flag will be set when reading partial DIEs if we need to load
705 absolutely all DIEs for this compilation unit, instead of just the ones
706 we think are interesting. It gets set if we look for a DIE in the
707 hash table and don't find it. */
708 unsigned int load_all_dies
: 1;
710 /* Non-zero if this CU is from .debug_types.
711 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
713 unsigned int is_debug_types
: 1;
715 /* Non-zero if this CU is from the .dwz file. */
716 unsigned int is_dwz
: 1;
718 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
719 This flag is only valid if is_debug_types is true.
720 We can't read a CU directly from a DWO file: There are required
721 attributes in the stub. */
722 unsigned int reading_dwo_directly
: 1;
724 /* Non-zero if the TU has been read.
725 This is used to assist the "Stay in DWO Optimization" for Fission:
726 When reading a DWO, it's faster to read TUs from the DWO instead of
727 fetching them from random other DWOs (due to comdat folding).
728 If the TU has already been read, the optimization is unnecessary
729 (and unwise - we don't want to change where gdb thinks the TU lives
731 This flag is only valid if is_debug_types is true. */
732 unsigned int tu_read
: 1;
734 /* The section this CU/TU lives in.
735 If the DIE refers to a DWO file, this is always the original die,
737 struct dwarf2_section_info
*section
;
739 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
740 of the CU cache it gets reset to NULL again. This is left as NULL for
741 dummy CUs (a CU header, but nothing else). */
742 struct dwarf2_cu
*cu
;
744 /* The corresponding objfile.
745 Normally we can get the objfile from dwarf2_per_objfile.
746 However we can enter this file with just a "per_cu" handle. */
747 struct objfile
*objfile
;
749 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
750 is active. Otherwise, the 'psymtab' field is active. */
753 /* The partial symbol table associated with this compilation unit,
754 or NULL for unread partial units. */
755 struct partial_symtab
*psymtab
;
757 /* Data needed by the "quick" functions. */
758 struct dwarf2_per_cu_quick_data
*quick
;
761 /* The CUs we import using DW_TAG_imported_unit. This is filled in
762 while reading psymtabs, used to compute the psymtab dependencies,
763 and then cleared. Then it is filled in again while reading full
764 symbols, and only deleted when the objfile is destroyed.
766 This is also used to work around a difference between the way gold
767 generates .gdb_index version <=7 and the way gdb does. Arguably this
768 is a gold bug. For symbols coming from TUs, gold records in the index
769 the CU that includes the TU instead of the TU itself. This breaks
770 dw2_lookup_symbol: It assumes that if the index says symbol X lives
771 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
772 will find X. Alas TUs live in their own symtab, so after expanding CU Y
773 we need to look in TU Z to find X. Fortunately, this is akin to
774 DW_TAG_imported_unit, so we just use the same mechanism: For
775 .gdb_index version <=7 this also records the TUs that the CU referred
776 to. Concurrently with this change gdb was modified to emit version 8
777 indices so we only pay a price for gold generated indices.
778 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
779 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
782 /* Entry in the signatured_types hash table. */
784 struct signatured_type
786 /* The "per_cu" object of this type.
787 This struct is used iff per_cu.is_debug_types.
788 N.B.: This is the first member so that it's easy to convert pointers
790 struct dwarf2_per_cu_data per_cu
;
792 /* The type's signature. */
795 /* Offset in the TU of the type's DIE, as read from the TU header.
796 If this TU is a DWO stub and the definition lives in a DWO file
797 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
798 cu_offset type_offset_in_tu
;
800 /* Offset in the section of the type's DIE.
801 If the definition lives in a DWO file, this is the offset in the
802 .debug_types.dwo section.
803 The value is zero until the actual value is known.
804 Zero is otherwise not a valid section offset. */
805 sect_offset type_offset_in_section
;
807 /* Type units are grouped by their DW_AT_stmt_list entry so that they
808 can share them. This points to the containing symtab. */
809 struct type_unit_group
*type_unit_group
;
812 The first time we encounter this type we fully read it in and install it
813 in the symbol tables. Subsequent times we only need the type. */
816 /* Containing DWO unit.
817 This field is valid iff per_cu.reading_dwo_directly. */
818 struct dwo_unit
*dwo_unit
;
821 typedef struct signatured_type
*sig_type_ptr
;
822 DEF_VEC_P (sig_type_ptr
);
824 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
825 This includes type_unit_group and quick_file_names. */
827 struct stmt_list_hash
829 /* The DWO unit this table is from or NULL if there is none. */
830 struct dwo_unit
*dwo_unit
;
832 /* Offset in .debug_line or .debug_line.dwo. */
833 sect_offset line_sect_off
;
836 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
837 an object of this type. */
839 struct type_unit_group
841 /* dwarf2read.c's main "handle" on a TU symtab.
842 To simplify things we create an artificial CU that "includes" all the
843 type units using this stmt_list so that the rest of the code still has
844 a "per_cu" handle on the symtab.
845 This PER_CU is recognized by having no section. */
846 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
847 struct dwarf2_per_cu_data per_cu
;
849 /* The TUs that share this DW_AT_stmt_list entry.
850 This is added to while parsing type units to build partial symtabs,
851 and is deleted afterwards and not used again. */
852 VEC (sig_type_ptr
) *tus
;
854 /* The compunit symtab.
855 Type units in a group needn't all be defined in the same source file,
856 so we create an essentially anonymous symtab as the compunit symtab. */
857 struct compunit_symtab
*compunit_symtab
;
859 /* The data used to construct the hash key. */
860 struct stmt_list_hash hash
;
862 /* The number of symtabs from the line header.
863 The value here must match line_header.num_file_names. */
864 unsigned int num_symtabs
;
866 /* The symbol tables for this TU (obtained from the files listed in
868 WARNING: The order of entries here must match the order of entries
869 in the line header. After the first TU using this type_unit_group, the
870 line header for the subsequent TUs is recreated from this. This is done
871 because we need to use the same symtabs for each TU using the same
872 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
873 there's no guarantee the line header doesn't have duplicate entries. */
874 struct symtab
**symtabs
;
877 /* These sections are what may appear in a (real or virtual) DWO file. */
881 struct dwarf2_section_info abbrev
;
882 struct dwarf2_section_info line
;
883 struct dwarf2_section_info loc
;
884 struct dwarf2_section_info loclists
;
885 struct dwarf2_section_info macinfo
;
886 struct dwarf2_section_info macro
;
887 struct dwarf2_section_info str
;
888 struct dwarf2_section_info str_offsets
;
889 /* In the case of a virtual DWO file, these two are unused. */
890 struct dwarf2_section_info info
;
891 VEC (dwarf2_section_info_def
) *types
;
894 /* CUs/TUs in DWP/DWO files. */
898 /* Backlink to the containing struct dwo_file. */
899 struct dwo_file
*dwo_file
;
901 /* The "id" that distinguishes this CU/TU.
902 .debug_info calls this "dwo_id", .debug_types calls this "signature".
903 Since signatures came first, we stick with it for consistency. */
906 /* The section this CU/TU lives in, in the DWO file. */
907 struct dwarf2_section_info
*section
;
909 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
910 sect_offset sect_off
;
913 /* For types, offset in the type's DIE of the type defined by this TU. */
914 cu_offset type_offset_in_tu
;
917 /* include/dwarf2.h defines the DWP section codes.
918 It defines a max value but it doesn't define a min value, which we
919 use for error checking, so provide one. */
921 enum dwp_v2_section_ids
926 /* Data for one DWO file.
928 This includes virtual DWO files (a virtual DWO file is a DWO file as it
929 appears in a DWP file). DWP files don't really have DWO files per se -
930 comdat folding of types "loses" the DWO file they came from, and from
931 a high level view DWP files appear to contain a mass of random types.
932 However, to maintain consistency with the non-DWP case we pretend DWP
933 files contain virtual DWO files, and we assign each TU with one virtual
934 DWO file (generally based on the line and abbrev section offsets -
935 a heuristic that seems to work in practice). */
939 /* The DW_AT_GNU_dwo_name attribute.
940 For virtual DWO files the name is constructed from the section offsets
941 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
942 from related CU+TUs. */
943 const char *dwo_name
;
945 /* The DW_AT_comp_dir attribute. */
946 const char *comp_dir
;
948 /* The bfd, when the file is open. Otherwise this is NULL.
949 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
952 /* The sections that make up this DWO file.
953 Remember that for virtual DWO files in DWP V2, these are virtual
954 sections (for lack of a better name). */
955 struct dwo_sections sections
;
957 /* The CUs in the file.
958 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
959 an extension to handle LLVM's Link Time Optimization output (where
960 multiple source files may be compiled into a single object/dwo pair). */
963 /* Table of TUs in the file.
964 Each element is a struct dwo_unit. */
968 /* These sections are what may appear in a DWP file. */
972 /* These are used by both DWP version 1 and 2. */
973 struct dwarf2_section_info str
;
974 struct dwarf2_section_info cu_index
;
975 struct dwarf2_section_info tu_index
;
977 /* These are only used by DWP version 2 files.
978 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
979 sections are referenced by section number, and are not recorded here.
980 In DWP version 2 there is at most one copy of all these sections, each
981 section being (effectively) comprised of the concatenation of all of the
982 individual sections that exist in the version 1 format.
983 To keep the code simple we treat each of these concatenated pieces as a
984 section itself (a virtual section?). */
985 struct dwarf2_section_info abbrev
;
986 struct dwarf2_section_info info
;
987 struct dwarf2_section_info line
;
988 struct dwarf2_section_info loc
;
989 struct dwarf2_section_info macinfo
;
990 struct dwarf2_section_info macro
;
991 struct dwarf2_section_info str_offsets
;
992 struct dwarf2_section_info types
;
995 /* These sections are what may appear in a virtual DWO file in DWP version 1.
996 A virtual DWO file is a DWO file as it appears in a DWP file. */
998 struct virtual_v1_dwo_sections
1000 struct dwarf2_section_info abbrev
;
1001 struct dwarf2_section_info line
;
1002 struct dwarf2_section_info loc
;
1003 struct dwarf2_section_info macinfo
;
1004 struct dwarf2_section_info macro
;
1005 struct dwarf2_section_info str_offsets
;
1006 /* Each DWP hash table entry records one CU or one TU.
1007 That is recorded here, and copied to dwo_unit.section. */
1008 struct dwarf2_section_info info_or_types
;
1011 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
1012 In version 2, the sections of the DWO files are concatenated together
1013 and stored in one section of that name. Thus each ELF section contains
1014 several "virtual" sections. */
1016 struct virtual_v2_dwo_sections
1018 bfd_size_type abbrev_offset
;
1019 bfd_size_type abbrev_size
;
1021 bfd_size_type line_offset
;
1022 bfd_size_type line_size
;
1024 bfd_size_type loc_offset
;
1025 bfd_size_type loc_size
;
1027 bfd_size_type macinfo_offset
;
1028 bfd_size_type macinfo_size
;
1030 bfd_size_type macro_offset
;
1031 bfd_size_type macro_size
;
1033 bfd_size_type str_offsets_offset
;
1034 bfd_size_type str_offsets_size
;
1036 /* Each DWP hash table entry records one CU or one TU.
1037 That is recorded here, and copied to dwo_unit.section. */
1038 bfd_size_type info_or_types_offset
;
1039 bfd_size_type info_or_types_size
;
1042 /* Contents of DWP hash tables. */
1044 struct dwp_hash_table
1046 uint32_t version
, nr_columns
;
1047 uint32_t nr_units
, nr_slots
;
1048 const gdb_byte
*hash_table
, *unit_table
;
1053 const gdb_byte
*indices
;
1057 /* This is indexed by column number and gives the id of the section
1059 #define MAX_NR_V2_DWO_SECTIONS \
1060 (1 /* .debug_info or .debug_types */ \
1061 + 1 /* .debug_abbrev */ \
1062 + 1 /* .debug_line */ \
1063 + 1 /* .debug_loc */ \
1064 + 1 /* .debug_str_offsets */ \
1065 + 1 /* .debug_macro or .debug_macinfo */)
1066 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
1067 const gdb_byte
*offsets
;
1068 const gdb_byte
*sizes
;
1073 /* Data for one DWP file. */
1077 /* Name of the file. */
1080 /* File format version. */
1086 /* Section info for this file. */
1087 struct dwp_sections sections
;
1089 /* Table of CUs in the file. */
1090 const struct dwp_hash_table
*cus
;
1092 /* Table of TUs in the file. */
1093 const struct dwp_hash_table
*tus
;
1095 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
1099 /* Table to map ELF section numbers to their sections.
1100 This is only needed for the DWP V1 file format. */
1101 unsigned int num_sections
;
1102 asection
**elf_sections
;
1105 /* This represents a '.dwz' file. */
1109 /* A dwz file can only contain a few sections. */
1110 struct dwarf2_section_info abbrev
;
1111 struct dwarf2_section_info info
;
1112 struct dwarf2_section_info str
;
1113 struct dwarf2_section_info line
;
1114 struct dwarf2_section_info macro
;
1115 struct dwarf2_section_info gdb_index
;
1117 /* The dwz's BFD. */
1121 /* Struct used to pass misc. parameters to read_die_and_children, et
1122 al. which are used for both .debug_info and .debug_types dies.
1123 All parameters here are unchanging for the life of the call. This
1124 struct exists to abstract away the constant parameters of die reading. */
1126 struct die_reader_specs
1128 /* The bfd of die_section. */
1131 /* The CU of the DIE we are parsing. */
1132 struct dwarf2_cu
*cu
;
1134 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1135 struct dwo_file
*dwo_file
;
1137 /* The section the die comes from.
1138 This is either .debug_info or .debug_types, or the .dwo variants. */
1139 struct dwarf2_section_info
*die_section
;
1141 /* die_section->buffer. */
1142 const gdb_byte
*buffer
;
1144 /* The end of the buffer. */
1145 const gdb_byte
*buffer_end
;
1147 /* The value of the DW_AT_comp_dir attribute. */
1148 const char *comp_dir
;
1151 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1152 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1153 const gdb_byte
*info_ptr
,
1154 struct die_info
*comp_unit_die
,
1158 /* A 1-based directory index. This is a strong typedef to prevent
1159 accidentally using a directory index as a 0-based index into an
1161 enum class dir_index
: unsigned int {};
1163 /* Likewise, a 1-based file name index. */
1164 enum class file_name_index
: unsigned int {};
1168 file_entry () = default;
1170 file_entry (const char *name_
, dir_index d_index_
,
1171 unsigned int mod_time_
, unsigned int length_
)
1174 mod_time (mod_time_
),
1178 /* Return the include directory at D_INDEX stored in LH. Returns
1179 NULL if D_INDEX is out of bounds. */
1180 const char *include_dir (const line_header
*lh
) const;
1182 /* The file name. Note this is an observing pointer. The memory is
1183 owned by debug_line_buffer. */
1184 const char *name
{};
1186 /* The directory index (1-based). */
1187 dir_index d_index
{};
1189 unsigned int mod_time
{};
1191 unsigned int length
{};
1193 /* True if referenced by the Line Number Program. */
1196 /* The associated symbol table, if any. */
1197 struct symtab
*symtab
{};
1200 /* The line number information for a compilation unit (found in the
1201 .debug_line section) begins with a "statement program header",
1202 which contains the following information. */
1209 /* Add an entry to the include directory table. */
1210 void add_include_dir (const char *include_dir
);
1212 /* Add an entry to the file name table. */
1213 void add_file_name (const char *name
, dir_index d_index
,
1214 unsigned int mod_time
, unsigned int length
);
1216 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
1217 is out of bounds. */
1218 const char *include_dir_at (dir_index index
) const
1220 /* Convert directory index number (1-based) to vector index
1222 size_t vec_index
= to_underlying (index
) - 1;
1224 if (vec_index
>= include_dirs
.size ())
1226 return include_dirs
[vec_index
];
1229 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
1230 is out of bounds. */
1231 file_entry
*file_name_at (file_name_index index
)
1233 /* Convert file name index number (1-based) to vector index
1235 size_t vec_index
= to_underlying (index
) - 1;
1237 if (vec_index
>= file_names
.size ())
1239 return &file_names
[vec_index
];
1242 /* Const version of the above. */
1243 const file_entry
*file_name_at (unsigned int index
) const
1245 if (index
>= file_names
.size ())
1247 return &file_names
[index
];
1250 /* Offset of line number information in .debug_line section. */
1251 sect_offset sect_off
{};
1253 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1254 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1256 unsigned int total_length
{};
1257 unsigned short version
{};
1258 unsigned int header_length
{};
1259 unsigned char minimum_instruction_length
{};
1260 unsigned char maximum_ops_per_instruction
{};
1261 unsigned char default_is_stmt
{};
1263 unsigned char line_range
{};
1264 unsigned char opcode_base
{};
1266 /* standard_opcode_lengths[i] is the number of operands for the
1267 standard opcode whose value is i. This means that
1268 standard_opcode_lengths[0] is unused, and the last meaningful
1269 element is standard_opcode_lengths[opcode_base - 1]. */
1270 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1272 /* The include_directories table. Note these are observing
1273 pointers. The memory is owned by debug_line_buffer. */
1274 std::vector
<const char *> include_dirs
;
1276 /* The file_names table. */
1277 std::vector
<file_entry
> file_names
;
1279 /* The start and end of the statement program following this
1280 header. These point into dwarf2_per_objfile->line_buffer. */
1281 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1284 typedef std::unique_ptr
<line_header
> line_header_up
;
1287 file_entry::include_dir (const line_header
*lh
) const
1289 return lh
->include_dir_at (d_index
);
1292 /* When we construct a partial symbol table entry we only
1293 need this much information. */
1294 struct partial_die_info
1296 /* Offset of this DIE. */
1297 sect_offset sect_off
;
1299 /* DWARF-2 tag for this DIE. */
1300 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1302 /* Assorted flags describing the data found in this DIE. */
1303 unsigned int has_children
: 1;
1304 unsigned int is_external
: 1;
1305 unsigned int is_declaration
: 1;
1306 unsigned int has_type
: 1;
1307 unsigned int has_specification
: 1;
1308 unsigned int has_pc_info
: 1;
1309 unsigned int may_be_inlined
: 1;
1311 /* This DIE has been marked DW_AT_main_subprogram. */
1312 unsigned int main_subprogram
: 1;
1314 /* Flag set if the SCOPE field of this structure has been
1316 unsigned int scope_set
: 1;
1318 /* Flag set if the DIE has a byte_size attribute. */
1319 unsigned int has_byte_size
: 1;
1321 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1322 unsigned int has_const_value
: 1;
1324 /* Flag set if any of the DIE's children are template arguments. */
1325 unsigned int has_template_arguments
: 1;
1327 /* Flag set if fixup_partial_die has been called on this die. */
1328 unsigned int fixup_called
: 1;
1330 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1331 unsigned int is_dwz
: 1;
1333 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1334 unsigned int spec_is_dwz
: 1;
1336 /* The name of this DIE. Normally the value of DW_AT_name, but
1337 sometimes a default name for unnamed DIEs. */
1340 /* The linkage name, if present. */
1341 const char *linkage_name
;
1343 /* The scope to prepend to our children. This is generally
1344 allocated on the comp_unit_obstack, so will disappear
1345 when this compilation unit leaves the cache. */
1348 /* Some data associated with the partial DIE. The tag determines
1349 which field is live. */
1352 /* The location description associated with this DIE, if any. */
1353 struct dwarf_block
*locdesc
;
1354 /* The offset of an import, for DW_TAG_imported_unit. */
1355 sect_offset sect_off
;
1358 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1362 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1363 DW_AT_sibling, if any. */
1364 /* NOTE: This member isn't strictly necessary, read_partial_die could
1365 return DW_AT_sibling values to its caller load_partial_dies. */
1366 const gdb_byte
*sibling
;
1368 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1369 DW_AT_specification (or DW_AT_abstract_origin or
1370 DW_AT_extension). */
1371 sect_offset spec_offset
;
1373 /* Pointers to this DIE's parent, first child, and next sibling,
1375 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1378 /* This data structure holds the information of an abbrev. */
1381 unsigned int number
; /* number identifying abbrev */
1382 enum dwarf_tag tag
; /* dwarf tag */
1383 unsigned short has_children
; /* boolean */
1384 unsigned short num_attrs
; /* number of attributes */
1385 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1386 struct abbrev_info
*next
; /* next in chain */
1391 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1392 ENUM_BITFIELD(dwarf_form
) form
: 16;
1394 /* It is valid only if FORM is DW_FORM_implicit_const. */
1395 LONGEST implicit_const
;
1398 /* Size of abbrev_table.abbrev_hash_table. */
1399 #define ABBREV_HASH_SIZE 121
1401 /* Top level data structure to contain an abbreviation table. */
1405 /* Where the abbrev table came from.
1406 This is used as a sanity check when the table is used. */
1407 sect_offset sect_off
;
1409 /* Storage for the abbrev table. */
1410 struct obstack abbrev_obstack
;
1412 /* Hash table of abbrevs.
1413 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1414 It could be statically allocated, but the previous code didn't so we
1416 struct abbrev_info
**abbrevs
;
1419 /* Attributes have a name and a value. */
1422 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1423 ENUM_BITFIELD(dwarf_form
) form
: 15;
1425 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1426 field should be in u.str (existing only for DW_STRING) but it is kept
1427 here for better struct attribute alignment. */
1428 unsigned int string_is_canonical
: 1;
1433 struct dwarf_block
*blk
;
1442 /* This data structure holds a complete die structure. */
1445 /* DWARF-2 tag for this DIE. */
1446 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1448 /* Number of attributes */
1449 unsigned char num_attrs
;
1451 /* True if we're presently building the full type name for the
1452 type derived from this DIE. */
1453 unsigned char building_fullname
: 1;
1455 /* True if this die is in process. PR 16581. */
1456 unsigned char in_process
: 1;
1459 unsigned int abbrev
;
1461 /* Offset in .debug_info or .debug_types section. */
1462 sect_offset sect_off
;
1464 /* The dies in a compilation unit form an n-ary tree. PARENT
1465 points to this die's parent; CHILD points to the first child of
1466 this node; and all the children of a given node are chained
1467 together via their SIBLING fields. */
1468 struct die_info
*child
; /* Its first child, if any. */
1469 struct die_info
*sibling
; /* Its next sibling, if any. */
1470 struct die_info
*parent
; /* Its parent, if any. */
1472 /* An array of attributes, with NUM_ATTRS elements. There may be
1473 zero, but it's not common and zero-sized arrays are not
1474 sufficiently portable C. */
1475 struct attribute attrs
[1];
1478 /* Get at parts of an attribute structure. */
1480 #define DW_STRING(attr) ((attr)->u.str)
1481 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1482 #define DW_UNSND(attr) ((attr)->u.unsnd)
1483 #define DW_BLOCK(attr) ((attr)->u.blk)
1484 #define DW_SND(attr) ((attr)->u.snd)
1485 #define DW_ADDR(attr) ((attr)->u.addr)
1486 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1488 /* Blocks are a bunch of untyped bytes. */
1493 /* Valid only if SIZE is not zero. */
1494 const gdb_byte
*data
;
1497 #ifndef ATTR_ALLOC_CHUNK
1498 #define ATTR_ALLOC_CHUNK 4
1501 /* Allocate fields for structs, unions and enums in this size. */
1502 #ifndef DW_FIELD_ALLOC_CHUNK
1503 #define DW_FIELD_ALLOC_CHUNK 4
1506 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1507 but this would require a corresponding change in unpack_field_as_long
1509 static int bits_per_byte
= 8;
1513 struct nextfield
*next
;
1521 struct nextfnfield
*next
;
1522 struct fn_field fnfield
;
1529 struct nextfnfield
*head
;
1532 struct typedef_field_list
1534 struct typedef_field field
;
1535 struct typedef_field_list
*next
;
1538 /* The routines that read and process dies for a C struct or C++ class
1539 pass lists of data member fields and lists of member function fields
1540 in an instance of a field_info structure, as defined below. */
1543 /* List of data member and baseclasses fields. */
1544 struct nextfield
*fields
, *baseclasses
;
1546 /* Number of fields (including baseclasses). */
1549 /* Number of baseclasses. */
1552 /* Set if the accesibility of one of the fields is not public. */
1553 int non_public_fields
;
1555 /* Member function fieldlist array, contains name of possibly overloaded
1556 member function, number of overloaded member functions and a pointer
1557 to the head of the member function field chain. */
1558 struct fnfieldlist
*fnfieldlists
;
1560 /* Number of entries in the fnfieldlists array. */
1563 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1564 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1565 struct typedef_field_list
*typedef_field_list
;
1566 unsigned typedef_field_list_count
;
1569 /* One item on the queue of compilation units to read in full symbols
1571 struct dwarf2_queue_item
1573 struct dwarf2_per_cu_data
*per_cu
;
1574 enum language pretend_language
;
1575 struct dwarf2_queue_item
*next
;
1578 /* The current queue. */
1579 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1581 /* Loaded secondary compilation units are kept in memory until they
1582 have not been referenced for the processing of this many
1583 compilation units. Set this to zero to disable caching. Cache
1584 sizes of up to at least twenty will improve startup time for
1585 typical inter-CU-reference binaries, at an obvious memory cost. */
1586 static int dwarf_max_cache_age
= 5;
1588 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1589 struct cmd_list_element
*c
, const char *value
)
1591 fprintf_filtered (file
, _("The upper bound on the age of cached "
1592 "DWARF compilation units is %s.\n"),
1596 /* local function prototypes */
1598 static const char *get_section_name (const struct dwarf2_section_info
*);
1600 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1602 static void dwarf2_find_base_address (struct die_info
*die
,
1603 struct dwarf2_cu
*cu
);
1605 static struct partial_symtab
*create_partial_symtab
1606 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1608 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1609 const gdb_byte
*info_ptr
,
1610 struct die_info
*type_unit_die
,
1611 int has_children
, void *data
);
1613 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1615 static void scan_partial_symbols (struct partial_die_info
*,
1616 CORE_ADDR
*, CORE_ADDR
*,
1617 int, struct dwarf2_cu
*);
1619 static void add_partial_symbol (struct partial_die_info
*,
1620 struct dwarf2_cu
*);
1622 static void add_partial_namespace (struct partial_die_info
*pdi
,
1623 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1624 int set_addrmap
, struct dwarf2_cu
*cu
);
1626 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1627 CORE_ADDR
*highpc
, int set_addrmap
,
1628 struct dwarf2_cu
*cu
);
1630 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1631 struct dwarf2_cu
*cu
);
1633 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1634 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1635 int need_pc
, struct dwarf2_cu
*cu
);
1637 static void dwarf2_read_symtab (struct partial_symtab
*,
1640 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1642 static struct abbrev_info
*abbrev_table_lookup_abbrev
1643 (const struct abbrev_table
*, unsigned int);
1645 static struct abbrev_table
*abbrev_table_read_table
1646 (struct dwarf2_section_info
*, sect_offset
);
1648 static void abbrev_table_free (struct abbrev_table
*);
1650 static void abbrev_table_free_cleanup (void *);
1652 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1653 struct dwarf2_section_info
*);
1655 static void dwarf2_free_abbrev_table (void *);
1657 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1659 static struct partial_die_info
*load_partial_dies
1660 (const struct die_reader_specs
*, const gdb_byte
*, int);
1662 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1663 struct partial_die_info
*,
1664 struct abbrev_info
*,
1668 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1669 struct dwarf2_cu
*);
1671 static void fixup_partial_die (struct partial_die_info
*,
1672 struct dwarf2_cu
*);
1674 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1675 struct attribute
*, struct attr_abbrev
*,
1678 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1680 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1682 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1684 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1686 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1688 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1691 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1693 static LONGEST read_checked_initial_length_and_offset
1694 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1695 unsigned int *, unsigned int *);
1697 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1698 const struct comp_unit_head
*,
1701 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1703 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1706 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1708 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1710 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1711 const struct comp_unit_head
*,
1714 static const char *read_indirect_line_string (bfd
*, const gdb_byte
*,
1715 const struct comp_unit_head
*,
1718 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1720 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1722 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1726 static const char *read_str_index (const struct die_reader_specs
*reader
,
1727 ULONGEST str_index
);
1729 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1731 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1732 struct dwarf2_cu
*);
1734 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1737 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1738 struct dwarf2_cu
*cu
);
1740 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1741 struct dwarf2_cu
*cu
);
1743 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1745 static struct die_info
*die_specification (struct die_info
*die
,
1746 struct dwarf2_cu
**);
1748 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1749 struct dwarf2_cu
*cu
);
1751 static void dwarf_decode_lines (struct line_header
*, const char *,
1752 struct dwarf2_cu
*, struct partial_symtab
*,
1753 CORE_ADDR
, int decode_mapping
);
1755 static void dwarf2_start_subfile (const char *, const char *);
1757 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1758 const char *, const char *,
1761 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1762 struct dwarf2_cu
*);
1764 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1765 struct dwarf2_cu
*, struct symbol
*);
1767 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1768 struct dwarf2_cu
*);
1770 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1773 struct obstack
*obstack
,
1774 struct dwarf2_cu
*cu
, LONGEST
*value
,
1775 const gdb_byte
**bytes
,
1776 struct dwarf2_locexpr_baton
**baton
);
1778 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1780 static int need_gnat_info (struct dwarf2_cu
*);
1782 static struct type
*die_descriptive_type (struct die_info
*,
1783 struct dwarf2_cu
*);
1785 static void set_descriptive_type (struct type
*, struct die_info
*,
1786 struct dwarf2_cu
*);
1788 static struct type
*die_containing_type (struct die_info
*,
1789 struct dwarf2_cu
*);
1791 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1792 struct dwarf2_cu
*);
1794 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1796 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1798 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1800 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1801 const char *suffix
, int physname
,
1802 struct dwarf2_cu
*cu
);
1804 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1806 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1808 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1810 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1812 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1814 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1816 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1817 struct dwarf2_cu
*, struct partial_symtab
*);
1819 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1820 values. Keep the items ordered with increasing constraints compliance. */
1823 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1824 PC_BOUNDS_NOT_PRESENT
,
1826 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1827 were present but they do not form a valid range of PC addresses. */
1830 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1833 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1837 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1838 CORE_ADDR
*, CORE_ADDR
*,
1840 struct partial_symtab
*);
1842 static void get_scope_pc_bounds (struct die_info
*,
1843 CORE_ADDR
*, CORE_ADDR
*,
1844 struct dwarf2_cu
*);
1846 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1847 CORE_ADDR
, struct dwarf2_cu
*);
1849 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1850 struct dwarf2_cu
*);
1852 static void dwarf2_attach_fields_to_type (struct field_info
*,
1853 struct type
*, struct dwarf2_cu
*);
1855 static void dwarf2_add_member_fn (struct field_info
*,
1856 struct die_info
*, struct type
*,
1857 struct dwarf2_cu
*);
1859 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1861 struct dwarf2_cu
*);
1863 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1865 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1867 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1869 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1871 static struct using_direct
**using_directives (enum language
);
1873 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1875 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1877 static struct type
*read_module_type (struct die_info
*die
,
1878 struct dwarf2_cu
*cu
);
1880 static const char *namespace_name (struct die_info
*die
,
1881 int *is_anonymous
, struct dwarf2_cu
*);
1883 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1885 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1887 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1888 struct dwarf2_cu
*);
1890 static struct die_info
*read_die_and_siblings_1
1891 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1894 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1895 const gdb_byte
*info_ptr
,
1896 const gdb_byte
**new_info_ptr
,
1897 struct die_info
*parent
);
1899 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1900 struct die_info
**, const gdb_byte
*,
1903 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1904 struct die_info
**, const gdb_byte
*,
1907 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1909 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1912 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1914 static const char *dwarf2_full_name (const char *name
,
1915 struct die_info
*die
,
1916 struct dwarf2_cu
*cu
);
1918 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1919 struct dwarf2_cu
*cu
);
1921 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1922 struct dwarf2_cu
**);
1924 static const char *dwarf_tag_name (unsigned int);
1926 static const char *dwarf_attr_name (unsigned int);
1928 static const char *dwarf_form_name (unsigned int);
1930 static const char *dwarf_bool_name (unsigned int);
1932 static const char *dwarf_type_encoding_name (unsigned int);
1934 static struct die_info
*sibling_die (struct die_info
*);
1936 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1938 static void dump_die_for_error (struct die_info
*);
1940 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1943 /*static*/ void dump_die (struct die_info
*, int max_level
);
1945 static void store_in_ref_table (struct die_info
*,
1946 struct dwarf2_cu
*);
1948 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1950 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1952 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1953 const struct attribute
*,
1954 struct dwarf2_cu
**);
1956 static struct die_info
*follow_die_ref (struct die_info
*,
1957 const struct attribute
*,
1958 struct dwarf2_cu
**);
1960 static struct die_info
*follow_die_sig (struct die_info
*,
1961 const struct attribute
*,
1962 struct dwarf2_cu
**);
1964 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1965 struct dwarf2_cu
*);
1967 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1968 const struct attribute
*,
1969 struct dwarf2_cu
*);
1971 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1973 static void read_signatured_type (struct signatured_type
*);
1975 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1976 struct die_info
*die
, struct dwarf2_cu
*cu
,
1977 struct dynamic_prop
*prop
);
1979 /* memory allocation interface */
1981 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1983 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1985 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1987 static int attr_form_is_block (const struct attribute
*);
1989 static int attr_form_is_section_offset (const struct attribute
*);
1991 static int attr_form_is_constant (const struct attribute
*);
1993 static int attr_form_is_ref (const struct attribute
*);
1995 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1996 struct dwarf2_loclist_baton
*baton
,
1997 const struct attribute
*attr
);
1999 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
2001 struct dwarf2_cu
*cu
,
2004 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
2005 const gdb_byte
*info_ptr
,
2006 struct abbrev_info
*abbrev
);
2008 static void free_stack_comp_unit (void *);
2010 static hashval_t
partial_die_hash (const void *item
);
2012 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
2014 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
2015 (sect_offset sect_off
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
2017 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
2018 struct dwarf2_per_cu_data
*per_cu
);
2020 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
2021 struct die_info
*comp_unit_die
,
2022 enum language pretend_language
);
2024 static void free_heap_comp_unit (void *);
2026 static void free_cached_comp_units (void *);
2028 static void age_cached_comp_units (void);
2030 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
2032 static struct type
*set_die_type (struct die_info
*, struct type
*,
2033 struct dwarf2_cu
*);
2035 static void create_all_comp_units (struct objfile
*);
2037 static int create_all_type_units (struct objfile
*);
2039 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
2042 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
2045 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
2048 static void dwarf2_add_dependence (struct dwarf2_cu
*,
2049 struct dwarf2_per_cu_data
*);
2051 static void dwarf2_mark (struct dwarf2_cu
*);
2053 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
2055 static struct type
*get_die_type_at_offset (sect_offset
,
2056 struct dwarf2_per_cu_data
*);
2058 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
2060 static void dwarf2_release_queue (void *dummy
);
2062 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
2063 enum language pretend_language
);
2065 static void process_queue (void);
2067 /* The return type of find_file_and_directory. Note, the enclosed
2068 string pointers are only valid while this object is valid. */
2070 struct file_and_directory
2072 /* The filename. This is never NULL. */
2075 /* The compilation directory. NULL if not known. If we needed to
2076 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
2077 points directly to the DW_AT_comp_dir string attribute owned by
2078 the obstack that owns the DIE. */
2079 const char *comp_dir
;
2081 /* If we needed to build a new string for comp_dir, this is what
2082 owns the storage. */
2083 std::string comp_dir_storage
;
2086 static file_and_directory
find_file_and_directory (struct die_info
*die
,
2087 struct dwarf2_cu
*cu
);
2089 static char *file_full_name (int file
, struct line_header
*lh
,
2090 const char *comp_dir
);
2092 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
2093 enum class rcuh_kind
{ COMPILE
, TYPE
};
2095 static const gdb_byte
*read_and_check_comp_unit_head
2096 (struct comp_unit_head
*header
,
2097 struct dwarf2_section_info
*section
,
2098 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
2099 rcuh_kind section_kind
);
2101 static void init_cutu_and_read_dies
2102 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
2103 int use_existing_cu
, int keep
,
2104 die_reader_func_ftype
*die_reader_func
, void *data
);
2106 static void init_cutu_and_read_dies_simple
2107 (struct dwarf2_per_cu_data
*this_cu
,
2108 die_reader_func_ftype
*die_reader_func
, void *data
);
2110 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
2112 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
2114 static struct dwo_unit
*lookup_dwo_unit_in_dwp
2115 (struct dwp_file
*dwp_file
, const char *comp_dir
,
2116 ULONGEST signature
, int is_debug_types
);
2118 static struct dwp_file
*get_dwp_file (void);
2120 static struct dwo_unit
*lookup_dwo_comp_unit
2121 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
2123 static struct dwo_unit
*lookup_dwo_type_unit
2124 (struct signatured_type
*, const char *, const char *);
2126 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
2128 static void free_dwo_file_cleanup (void *);
2130 static void process_cu_includes (void);
2132 static void check_producer (struct dwarf2_cu
*cu
);
2134 static void free_line_header_voidp (void *arg
);
2136 /* Various complaints about symbol reading that don't abort the process. */
2139 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2141 complaint (&symfile_complaints
,
2142 _("statement list doesn't fit in .debug_line section"));
2146 dwarf2_debug_line_missing_file_complaint (void)
2148 complaint (&symfile_complaints
,
2149 _(".debug_line section has line data without a file"));
2153 dwarf2_debug_line_missing_end_sequence_complaint (void)
2155 complaint (&symfile_complaints
,
2156 _(".debug_line section has line "
2157 "program sequence without an end"));
2161 dwarf2_complex_location_expr_complaint (void)
2163 complaint (&symfile_complaints
, _("location expression too complex"));
2167 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2170 complaint (&symfile_complaints
,
2171 _("const value length mismatch for '%s', got %d, expected %d"),
2176 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2178 complaint (&symfile_complaints
,
2179 _("debug info runs off end of %s section"
2181 get_section_name (section
),
2182 get_section_file_name (section
));
2186 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2188 complaint (&symfile_complaints
,
2189 _("macro debug info contains a "
2190 "malformed macro definition:\n`%s'"),
2195 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2197 complaint (&symfile_complaints
,
2198 _("invalid attribute class or form for '%s' in '%s'"),
2202 /* Hash function for line_header_hash. */
2205 line_header_hash (const struct line_header
*ofs
)
2207 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2210 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2213 line_header_hash_voidp (const void *item
)
2215 const struct line_header
*ofs
= (const struct line_header
*) item
;
2217 return line_header_hash (ofs
);
2220 /* Equality function for line_header_hash. */
2223 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2225 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2226 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2228 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2229 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2234 /* Read the given attribute value as an address, taking the attribute's
2235 form into account. */
2238 attr_value_as_address (struct attribute
*attr
)
2242 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2244 /* Aside from a few clearly defined exceptions, attributes that
2245 contain an address must always be in DW_FORM_addr form.
2246 Unfortunately, some compilers happen to be violating this
2247 requirement by encoding addresses using other forms, such
2248 as DW_FORM_data4 for example. For those broken compilers,
2249 we try to do our best, without any guarantee of success,
2250 to interpret the address correctly. It would also be nice
2251 to generate a complaint, but that would require us to maintain
2252 a list of legitimate cases where a non-address form is allowed,
2253 as well as update callers to pass in at least the CU's DWARF
2254 version. This is more overhead than what we're willing to
2255 expand for a pretty rare case. */
2256 addr
= DW_UNSND (attr
);
2259 addr
= DW_ADDR (attr
);
2264 /* The suffix for an index file. */
2265 #define INDEX_SUFFIX ".gdb-index"
2267 /* See declaration. */
2269 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2270 const dwarf2_debug_sections
*names
)
2271 : objfile (objfile_
)
2274 names
= &dwarf2_elf_names
;
2276 bfd
*obfd
= objfile
->obfd
;
2278 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2279 locate_sections (obfd
, sec
, *names
);
2282 dwarf2_per_objfile::~dwarf2_per_objfile ()
2284 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2285 free_cached_comp_units ();
2287 if (quick_file_names_table
)
2288 htab_delete (quick_file_names_table
);
2290 if (line_header_hash
)
2291 htab_delete (line_header_hash
);
2293 /* Everything else should be on the objfile obstack. */
2296 /* See declaration. */
2299 dwarf2_per_objfile::free_cached_comp_units ()
2301 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2302 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2303 while (per_cu
!= NULL
)
2305 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2307 free_heap_comp_unit (per_cu
->cu
);
2308 *last_chain
= next_cu
;
2313 /* Try to locate the sections we need for DWARF 2 debugging
2314 information and return true if we have enough to do something.
2315 NAMES points to the dwarf2 section names, or is NULL if the standard
2316 ELF names are used. */
2319 dwarf2_has_info (struct objfile
*objfile
,
2320 const struct dwarf2_debug_sections
*names
)
2322 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
2323 objfile_data (objfile
, dwarf2_objfile_data_key
));
2324 if (!dwarf2_per_objfile
)
2326 /* Initialize per-objfile state. */
2327 struct dwarf2_per_objfile
*data
2328 = XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_objfile
);
2330 dwarf2_per_objfile
= new (data
) struct dwarf2_per_objfile (objfile
, names
);
2331 set_objfile_data (objfile
, dwarf2_objfile_data_key
, dwarf2_per_objfile
);
2333 return (!dwarf2_per_objfile
->info
.is_virtual
2334 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2335 && !dwarf2_per_objfile
->abbrev
.is_virtual
2336 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2339 /* Return the containing section of virtual section SECTION. */
2341 static struct dwarf2_section_info
*
2342 get_containing_section (const struct dwarf2_section_info
*section
)
2344 gdb_assert (section
->is_virtual
);
2345 return section
->s
.containing_section
;
2348 /* Return the bfd owner of SECTION. */
2351 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2353 if (section
->is_virtual
)
2355 section
= get_containing_section (section
);
2356 gdb_assert (!section
->is_virtual
);
2358 return section
->s
.section
->owner
;
2361 /* Return the bfd section of SECTION.
2362 Returns NULL if the section is not present. */
2365 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2367 if (section
->is_virtual
)
2369 section
= get_containing_section (section
);
2370 gdb_assert (!section
->is_virtual
);
2372 return section
->s
.section
;
2375 /* Return the name of SECTION. */
2378 get_section_name (const struct dwarf2_section_info
*section
)
2380 asection
*sectp
= get_section_bfd_section (section
);
2382 gdb_assert (sectp
!= NULL
);
2383 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2386 /* Return the name of the file SECTION is in. */
2389 get_section_file_name (const struct dwarf2_section_info
*section
)
2391 bfd
*abfd
= get_section_bfd_owner (section
);
2393 return bfd_get_filename (abfd
);
2396 /* Return the id of SECTION.
2397 Returns 0 if SECTION doesn't exist. */
2400 get_section_id (const struct dwarf2_section_info
*section
)
2402 asection
*sectp
= get_section_bfd_section (section
);
2409 /* Return the flags of SECTION.
2410 SECTION (or containing section if this is a virtual section) must exist. */
2413 get_section_flags (const struct dwarf2_section_info
*section
)
2415 asection
*sectp
= get_section_bfd_section (section
);
2417 gdb_assert (sectp
!= NULL
);
2418 return bfd_get_section_flags (sectp
->owner
, sectp
);
2421 /* When loading sections, we look either for uncompressed section or for
2422 compressed section names. */
2425 section_is_p (const char *section_name
,
2426 const struct dwarf2_section_names
*names
)
2428 if (names
->normal
!= NULL
2429 && strcmp (section_name
, names
->normal
) == 0)
2431 if (names
->compressed
!= NULL
2432 && strcmp (section_name
, names
->compressed
) == 0)
2437 /* See declaration. */
2440 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2441 const dwarf2_debug_sections
&names
)
2443 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2445 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2448 else if (section_is_p (sectp
->name
, &names
.info
))
2450 this->info
.s
.section
= sectp
;
2451 this->info
.size
= bfd_get_section_size (sectp
);
2453 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2455 this->abbrev
.s
.section
= sectp
;
2456 this->abbrev
.size
= bfd_get_section_size (sectp
);
2458 else if (section_is_p (sectp
->name
, &names
.line
))
2460 this->line
.s
.section
= sectp
;
2461 this->line
.size
= bfd_get_section_size (sectp
);
2463 else if (section_is_p (sectp
->name
, &names
.loc
))
2465 this->loc
.s
.section
= sectp
;
2466 this->loc
.size
= bfd_get_section_size (sectp
);
2468 else if (section_is_p (sectp
->name
, &names
.loclists
))
2470 this->loclists
.s
.section
= sectp
;
2471 this->loclists
.size
= bfd_get_section_size (sectp
);
2473 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2475 this->macinfo
.s
.section
= sectp
;
2476 this->macinfo
.size
= bfd_get_section_size (sectp
);
2478 else if (section_is_p (sectp
->name
, &names
.macro
))
2480 this->macro
.s
.section
= sectp
;
2481 this->macro
.size
= bfd_get_section_size (sectp
);
2483 else if (section_is_p (sectp
->name
, &names
.str
))
2485 this->str
.s
.section
= sectp
;
2486 this->str
.size
= bfd_get_section_size (sectp
);
2488 else if (section_is_p (sectp
->name
, &names
.line_str
))
2490 this->line_str
.s
.section
= sectp
;
2491 this->line_str
.size
= bfd_get_section_size (sectp
);
2493 else if (section_is_p (sectp
->name
, &names
.addr
))
2495 this->addr
.s
.section
= sectp
;
2496 this->addr
.size
= bfd_get_section_size (sectp
);
2498 else if (section_is_p (sectp
->name
, &names
.frame
))
2500 this->frame
.s
.section
= sectp
;
2501 this->frame
.size
= bfd_get_section_size (sectp
);
2503 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2505 this->eh_frame
.s
.section
= sectp
;
2506 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2508 else if (section_is_p (sectp
->name
, &names
.ranges
))
2510 this->ranges
.s
.section
= sectp
;
2511 this->ranges
.size
= bfd_get_section_size (sectp
);
2513 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2515 this->rnglists
.s
.section
= sectp
;
2516 this->rnglists
.size
= bfd_get_section_size (sectp
);
2518 else if (section_is_p (sectp
->name
, &names
.types
))
2520 struct dwarf2_section_info type_section
;
2522 memset (&type_section
, 0, sizeof (type_section
));
2523 type_section
.s
.section
= sectp
;
2524 type_section
.size
= bfd_get_section_size (sectp
);
2526 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2529 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2531 this->gdb_index
.s
.section
= sectp
;
2532 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2535 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2536 && bfd_section_vma (abfd
, sectp
) == 0)
2537 this->has_section_at_zero
= true;
2540 /* A helper function that decides whether a section is empty,
2544 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2546 if (section
->is_virtual
)
2547 return section
->size
== 0;
2548 return section
->s
.section
== NULL
|| section
->size
== 0;
2551 /* Read the contents of the section INFO.
2552 OBJFILE is the main object file, but not necessarily the file where
2553 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2555 If the section is compressed, uncompress it before returning. */
2558 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2562 gdb_byte
*buf
, *retbuf
;
2566 info
->buffer
= NULL
;
2569 if (dwarf2_section_empty_p (info
))
2572 sectp
= get_section_bfd_section (info
);
2574 /* If this is a virtual section we need to read in the real one first. */
2575 if (info
->is_virtual
)
2577 struct dwarf2_section_info
*containing_section
=
2578 get_containing_section (info
);
2580 gdb_assert (sectp
!= NULL
);
2581 if ((sectp
->flags
& SEC_RELOC
) != 0)
2583 error (_("Dwarf Error: DWP format V2 with relocations is not"
2584 " supported in section %s [in module %s]"),
2585 get_section_name (info
), get_section_file_name (info
));
2587 dwarf2_read_section (objfile
, containing_section
);
2588 /* Other code should have already caught virtual sections that don't
2590 gdb_assert (info
->virtual_offset
+ info
->size
2591 <= containing_section
->size
);
2592 /* If the real section is empty or there was a problem reading the
2593 section we shouldn't get here. */
2594 gdb_assert (containing_section
->buffer
!= NULL
);
2595 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2599 /* If the section has relocations, we must read it ourselves.
2600 Otherwise we attach it to the BFD. */
2601 if ((sectp
->flags
& SEC_RELOC
) == 0)
2603 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2607 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2610 /* When debugging .o files, we may need to apply relocations; see
2611 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2612 We never compress sections in .o files, so we only need to
2613 try this when the section is not compressed. */
2614 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2617 info
->buffer
= retbuf
;
2621 abfd
= get_section_bfd_owner (info
);
2622 gdb_assert (abfd
!= NULL
);
2624 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2625 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2627 error (_("Dwarf Error: Can't read DWARF data"
2628 " in section %s [in module %s]"),
2629 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2633 /* A helper function that returns the size of a section in a safe way.
2634 If you are positive that the section has been read before using the
2635 size, then it is safe to refer to the dwarf2_section_info object's
2636 "size" field directly. In other cases, you must call this
2637 function, because for compressed sections the size field is not set
2638 correctly until the section has been read. */
2640 static bfd_size_type
2641 dwarf2_section_size (struct objfile
*objfile
,
2642 struct dwarf2_section_info
*info
)
2645 dwarf2_read_section (objfile
, info
);
2649 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2653 dwarf2_get_section_info (struct objfile
*objfile
,
2654 enum dwarf2_section_enum sect
,
2655 asection
**sectp
, const gdb_byte
**bufp
,
2656 bfd_size_type
*sizep
)
2658 struct dwarf2_per_objfile
*data
2659 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2660 dwarf2_objfile_data_key
);
2661 struct dwarf2_section_info
*info
;
2663 /* We may see an objfile without any DWARF, in which case we just
2674 case DWARF2_DEBUG_FRAME
:
2675 info
= &data
->frame
;
2677 case DWARF2_EH_FRAME
:
2678 info
= &data
->eh_frame
;
2681 gdb_assert_not_reached ("unexpected section");
2684 dwarf2_read_section (objfile
, info
);
2686 *sectp
= get_section_bfd_section (info
);
2687 *bufp
= info
->buffer
;
2688 *sizep
= info
->size
;
2691 /* A helper function to find the sections for a .dwz file. */
2694 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2696 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2698 /* Note that we only support the standard ELF names, because .dwz
2699 is ELF-only (at the time of writing). */
2700 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2702 dwz_file
->abbrev
.s
.section
= sectp
;
2703 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2705 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2707 dwz_file
->info
.s
.section
= sectp
;
2708 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2710 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2712 dwz_file
->str
.s
.section
= sectp
;
2713 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2715 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2717 dwz_file
->line
.s
.section
= sectp
;
2718 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2720 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2722 dwz_file
->macro
.s
.section
= sectp
;
2723 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2725 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2727 dwz_file
->gdb_index
.s
.section
= sectp
;
2728 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2732 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2733 there is no .gnu_debugaltlink section in the file. Error if there
2734 is such a section but the file cannot be found. */
2736 static struct dwz_file
*
2737 dwarf2_get_dwz_file (void)
2739 const char *filename
;
2740 struct dwz_file
*result
;
2741 bfd_size_type buildid_len_arg
;
2745 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2746 return dwarf2_per_objfile
->dwz_file
;
2748 bfd_set_error (bfd_error_no_error
);
2749 gdb::unique_xmalloc_ptr
<char> data
2750 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2751 &buildid_len_arg
, &buildid
));
2754 if (bfd_get_error () == bfd_error_no_error
)
2756 error (_("could not read '.gnu_debugaltlink' section: %s"),
2757 bfd_errmsg (bfd_get_error ()));
2760 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2762 buildid_len
= (size_t) buildid_len_arg
;
2764 filename
= data
.get ();
2766 std::string abs_storage
;
2767 if (!IS_ABSOLUTE_PATH (filename
))
2769 gdb::unique_xmalloc_ptr
<char> abs
2770 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2772 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2773 filename
= abs_storage
.c_str ();
2776 /* First try the file name given in the section. If that doesn't
2777 work, try to use the build-id instead. */
2778 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2779 if (dwz_bfd
!= NULL
)
2781 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2785 if (dwz_bfd
== NULL
)
2786 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2788 if (dwz_bfd
== NULL
)
2789 error (_("could not find '.gnu_debugaltlink' file for %s"),
2790 objfile_name (dwarf2_per_objfile
->objfile
));
2792 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2794 result
->dwz_bfd
= dwz_bfd
.release ();
2796 bfd_map_over_sections (result
->dwz_bfd
, locate_dwz_sections
, result
);
2798 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, result
->dwz_bfd
);
2799 dwarf2_per_objfile
->dwz_file
= result
;
2803 /* DWARF quick_symbols_functions support. */
2805 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2806 unique line tables, so we maintain a separate table of all .debug_line
2807 derived entries to support the sharing.
2808 All the quick functions need is the list of file names. We discard the
2809 line_header when we're done and don't need to record it here. */
2810 struct quick_file_names
2812 /* The data used to construct the hash key. */
2813 struct stmt_list_hash hash
;
2815 /* The number of entries in file_names, real_names. */
2816 unsigned int num_file_names
;
2818 /* The file names from the line table, after being run through
2820 const char **file_names
;
2822 /* The file names from the line table after being run through
2823 gdb_realpath. These are computed lazily. */
2824 const char **real_names
;
2827 /* When using the index (and thus not using psymtabs), each CU has an
2828 object of this type. This is used to hold information needed by
2829 the various "quick" methods. */
2830 struct dwarf2_per_cu_quick_data
2832 /* The file table. This can be NULL if there was no file table
2833 or it's currently not read in.
2834 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2835 struct quick_file_names
*file_names
;
2837 /* The corresponding symbol table. This is NULL if symbols for this
2838 CU have not yet been read. */
2839 struct compunit_symtab
*compunit_symtab
;
2841 /* A temporary mark bit used when iterating over all CUs in
2842 expand_symtabs_matching. */
2843 unsigned int mark
: 1;
2845 /* True if we've tried to read the file table and found there isn't one.
2846 There will be no point in trying to read it again next time. */
2847 unsigned int no_file_data
: 1;
2850 /* Utility hash function for a stmt_list_hash. */
2853 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2857 if (stmt_list_hash
->dwo_unit
!= NULL
)
2858 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2859 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2863 /* Utility equality function for a stmt_list_hash. */
2866 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2867 const struct stmt_list_hash
*rhs
)
2869 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2871 if (lhs
->dwo_unit
!= NULL
2872 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2875 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2878 /* Hash function for a quick_file_names. */
2881 hash_file_name_entry (const void *e
)
2883 const struct quick_file_names
*file_data
2884 = (const struct quick_file_names
*) e
;
2886 return hash_stmt_list_entry (&file_data
->hash
);
2889 /* Equality function for a quick_file_names. */
2892 eq_file_name_entry (const void *a
, const void *b
)
2894 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2895 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2897 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2900 /* Delete function for a quick_file_names. */
2903 delete_file_name_entry (void *e
)
2905 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2908 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2910 xfree ((void*) file_data
->file_names
[i
]);
2911 if (file_data
->real_names
)
2912 xfree ((void*) file_data
->real_names
[i
]);
2915 /* The space for the struct itself lives on objfile_obstack,
2916 so we don't free it here. */
2919 /* Create a quick_file_names hash table. */
2922 create_quick_file_names_table (unsigned int nr_initial_entries
)
2924 return htab_create_alloc (nr_initial_entries
,
2925 hash_file_name_entry
, eq_file_name_entry
,
2926 delete_file_name_entry
, xcalloc
, xfree
);
2929 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2930 have to be created afterwards. You should call age_cached_comp_units after
2931 processing PER_CU->CU. dw2_setup must have been already called. */
2934 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2936 if (per_cu
->is_debug_types
)
2937 load_full_type_unit (per_cu
);
2939 load_full_comp_unit (per_cu
, language_minimal
);
2941 if (per_cu
->cu
== NULL
)
2942 return; /* Dummy CU. */
2944 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2947 /* Read in the symbols for PER_CU. */
2950 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2952 struct cleanup
*back_to
;
2954 /* Skip type_unit_groups, reading the type units they contain
2955 is handled elsewhere. */
2956 if (IS_TYPE_UNIT_GROUP (per_cu
))
2959 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2961 if (dwarf2_per_objfile
->using_index
2962 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2963 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2965 queue_comp_unit (per_cu
, language_minimal
);
2968 /* If we just loaded a CU from a DWO, and we're working with an index
2969 that may badly handle TUs, load all the TUs in that DWO as well.
2970 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2971 if (!per_cu
->is_debug_types
2972 && per_cu
->cu
!= NULL
2973 && per_cu
->cu
->dwo_unit
!= NULL
2974 && dwarf2_per_objfile
->index_table
!= NULL
2975 && dwarf2_per_objfile
->index_table
->version
<= 7
2976 /* DWP files aren't supported yet. */
2977 && get_dwp_file () == NULL
)
2978 queue_and_load_all_dwo_tus (per_cu
);
2983 /* Age the cache, releasing compilation units that have not
2984 been used recently. */
2985 age_cached_comp_units ();
2987 do_cleanups (back_to
);
2990 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2991 the objfile from which this CU came. Returns the resulting symbol
2994 static struct compunit_symtab
*
2995 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2997 gdb_assert (dwarf2_per_objfile
->using_index
);
2998 if (!per_cu
->v
.quick
->compunit_symtab
)
3000 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3001 scoped_restore decrementer
= increment_reading_symtab ();
3002 dw2_do_instantiate_symtab (per_cu
);
3003 process_cu_includes ();
3004 do_cleanups (back_to
);
3007 return per_cu
->v
.quick
->compunit_symtab
;
3010 /* Return the CU/TU given its index.
3012 This is intended for loops like:
3014 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3015 + dwarf2_per_objfile->n_type_units); ++i)
3017 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
3023 static struct dwarf2_per_cu_data
*
3024 dw2_get_cutu (int index
)
3026 if (index
>= dwarf2_per_objfile
->n_comp_units
)
3028 index
-= dwarf2_per_objfile
->n_comp_units
;
3029 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
3030 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
3033 return dwarf2_per_objfile
->all_comp_units
[index
];
3036 /* Return the CU given its index.
3037 This differs from dw2_get_cutu in that it's for when you know INDEX
3040 static struct dwarf2_per_cu_data
*
3041 dw2_get_cu (int index
)
3043 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
3045 return dwarf2_per_objfile
->all_comp_units
[index
];
3048 /* A helper for create_cus_from_index that handles a given list of
3052 create_cus_from_index_list (struct objfile
*objfile
,
3053 const gdb_byte
*cu_list
, offset_type n_elements
,
3054 struct dwarf2_section_info
*section
,
3060 for (i
= 0; i
< n_elements
; i
+= 2)
3062 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3064 sect_offset sect_off
3065 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
3066 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
3069 dwarf2_per_cu_data
*the_cu
3070 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3071 struct dwarf2_per_cu_data
);
3072 the_cu
->sect_off
= sect_off
;
3073 the_cu
->length
= length
;
3074 the_cu
->objfile
= objfile
;
3075 the_cu
->section
= section
;
3076 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3077 struct dwarf2_per_cu_quick_data
);
3078 the_cu
->is_dwz
= is_dwz
;
3079 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
3083 /* Read the CU list from the mapped index, and use it to create all
3084 the CU objects for this objfile. */
3087 create_cus_from_index (struct objfile
*objfile
,
3088 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3089 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3091 struct dwz_file
*dwz
;
3093 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
3094 dwarf2_per_objfile
->all_comp_units
=
3095 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
3096 dwarf2_per_objfile
->n_comp_units
);
3098 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
3099 &dwarf2_per_objfile
->info
, 0, 0);
3101 if (dwz_elements
== 0)
3104 dwz
= dwarf2_get_dwz_file ();
3105 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
3106 cu_list_elements
/ 2);
3109 /* Create the signatured type hash table from the index. */
3112 create_signatured_type_table_from_index (struct objfile
*objfile
,
3113 struct dwarf2_section_info
*section
,
3114 const gdb_byte
*bytes
,
3115 offset_type elements
)
3118 htab_t sig_types_hash
;
3120 dwarf2_per_objfile
->n_type_units
3121 = dwarf2_per_objfile
->n_allocated_type_units
3123 dwarf2_per_objfile
->all_type_units
=
3124 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
3126 sig_types_hash
= allocate_signatured_type_table (objfile
);
3128 for (i
= 0; i
< elements
; i
+= 3)
3130 struct signatured_type
*sig_type
;
3133 cu_offset type_offset_in_tu
;
3135 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3136 sect_offset sect_off
3137 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3139 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3141 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3144 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3145 struct signatured_type
);
3146 sig_type
->signature
= signature
;
3147 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3148 sig_type
->per_cu
.is_debug_types
= 1;
3149 sig_type
->per_cu
.section
= section
;
3150 sig_type
->per_cu
.sect_off
= sect_off
;
3151 sig_type
->per_cu
.objfile
= objfile
;
3152 sig_type
->per_cu
.v
.quick
3153 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3154 struct dwarf2_per_cu_quick_data
);
3156 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3159 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
3162 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3165 /* Read the address map data from the mapped index, and use it to
3166 populate the objfile's psymtabs_addrmap. */
3169 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
3171 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3172 const gdb_byte
*iter
, *end
;
3173 struct addrmap
*mutable_map
;
3176 auto_obstack temp_obstack
;
3178 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3180 iter
= index
->address_table
;
3181 end
= iter
+ index
->address_table_size
;
3183 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3187 ULONGEST hi
, lo
, cu_index
;
3188 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3190 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3192 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3197 complaint (&symfile_complaints
,
3198 _(".gdb_index address table has invalid range (%s - %s)"),
3199 hex_string (lo
), hex_string (hi
));
3203 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
3205 complaint (&symfile_complaints
,
3206 _(".gdb_index address table has invalid CU number %u"),
3207 (unsigned) cu_index
);
3211 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3212 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3213 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
3216 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3217 &objfile
->objfile_obstack
);
3220 /* The hash function for strings in the mapped index. This is the same as
3221 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
3222 implementation. This is necessary because the hash function is tied to the
3223 format of the mapped index file. The hash values do not have to match with
3226 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
3229 mapped_index_string_hash (int index_version
, const void *p
)
3231 const unsigned char *str
= (const unsigned char *) p
;
3235 while ((c
= *str
++) != 0)
3237 if (index_version
>= 5)
3239 r
= r
* 67 + c
- 113;
3245 /* Find a slot in the mapped index INDEX for the object named NAME.
3246 If NAME is found, set *VEC_OUT to point to the CU vector in the
3247 constant pool and return true. If NAME cannot be found, return
3251 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3252 offset_type
**vec_out
)
3255 offset_type slot
, step
;
3256 int (*cmp
) (const char *, const char *);
3258 gdb::unique_xmalloc_ptr
<char> without_params
;
3259 if (current_language
->la_language
== language_cplus
3260 || current_language
->la_language
== language_fortran
3261 || current_language
->la_language
== language_d
)
3263 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3266 if (strchr (name
, '(') != NULL
)
3268 without_params
= cp_remove_params (name
);
3270 if (without_params
!= NULL
)
3271 name
= without_params
.get ();
3275 /* Index version 4 did not support case insensitive searches. But the
3276 indices for case insensitive languages are built in lowercase, therefore
3277 simulate our NAME being searched is also lowercased. */
3278 hash
= mapped_index_string_hash ((index
->version
== 4
3279 && case_sensitivity
== case_sensitive_off
3280 ? 5 : index
->version
),
3283 slot
= hash
& (index
->symbol_table_slots
- 1);
3284 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3285 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3289 /* Convert a slot number to an offset into the table. */
3290 offset_type i
= 2 * slot
;
3292 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3295 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3296 if (!cmp (name
, str
))
3298 *vec_out
= (offset_type
*) (index
->constant_pool
3299 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3303 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3307 /* A helper function that reads the .gdb_index from SECTION and fills
3308 in MAP. FILENAME is the name of the file containing the section;
3309 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3310 ok to use deprecated sections.
3312 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3313 out parameters that are filled in with information about the CU and
3314 TU lists in the section.
3316 Returns 1 if all went well, 0 otherwise. */
3319 read_index_from_section (struct objfile
*objfile
,
3320 const char *filename
,
3322 struct dwarf2_section_info
*section
,
3323 struct mapped_index
*map
,
3324 const gdb_byte
**cu_list
,
3325 offset_type
*cu_list_elements
,
3326 const gdb_byte
**types_list
,
3327 offset_type
*types_list_elements
)
3329 const gdb_byte
*addr
;
3330 offset_type version
;
3331 offset_type
*metadata
;
3334 if (dwarf2_section_empty_p (section
))
3337 /* Older elfutils strip versions could keep the section in the main
3338 executable while splitting it for the separate debug info file. */
3339 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3342 dwarf2_read_section (objfile
, section
);
3344 addr
= section
->buffer
;
3345 /* Version check. */
3346 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3347 /* Versions earlier than 3 emitted every copy of a psymbol. This
3348 causes the index to behave very poorly for certain requests. Version 3
3349 contained incomplete addrmap. So, it seems better to just ignore such
3353 static int warning_printed
= 0;
3354 if (!warning_printed
)
3356 warning (_("Skipping obsolete .gdb_index section in %s."),
3358 warning_printed
= 1;
3362 /* Index version 4 uses a different hash function than index version
3365 Versions earlier than 6 did not emit psymbols for inlined
3366 functions. Using these files will cause GDB not to be able to
3367 set breakpoints on inlined functions by name, so we ignore these
3368 indices unless the user has done
3369 "set use-deprecated-index-sections on". */
3370 if (version
< 6 && !deprecated_ok
)
3372 static int warning_printed
= 0;
3373 if (!warning_printed
)
3376 Skipping deprecated .gdb_index section in %s.\n\
3377 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3378 to use the section anyway."),
3380 warning_printed
= 1;
3384 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3385 of the TU (for symbols coming from TUs),
3386 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3387 Plus gold-generated indices can have duplicate entries for global symbols,
3388 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3389 These are just performance bugs, and we can't distinguish gdb-generated
3390 indices from gold-generated ones, so issue no warning here. */
3392 /* Indexes with higher version than the one supported by GDB may be no
3393 longer backward compatible. */
3397 map
->version
= version
;
3398 map
->total_size
= section
->size
;
3400 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3403 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3404 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3408 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3409 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3410 - MAYBE_SWAP (metadata
[i
]))
3414 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3415 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3416 - MAYBE_SWAP (metadata
[i
]));
3419 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3420 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3421 - MAYBE_SWAP (metadata
[i
]))
3422 / (2 * sizeof (offset_type
)));
3425 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3431 /* Read the index file. If everything went ok, initialize the "quick"
3432 elements of all the CUs and return 1. Otherwise, return 0. */
3435 dwarf2_read_index (struct objfile
*objfile
)
3437 struct mapped_index local_map
, *map
;
3438 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3439 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3440 struct dwz_file
*dwz
;
3442 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3443 use_deprecated_index_sections
,
3444 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3445 &cu_list
, &cu_list_elements
,
3446 &types_list
, &types_list_elements
))
3449 /* Don't use the index if it's empty. */
3450 if (local_map
.symbol_table_slots
== 0)
3453 /* If there is a .dwz file, read it so we can get its CU list as
3455 dwz
= dwarf2_get_dwz_file ();
3458 struct mapped_index dwz_map
;
3459 const gdb_byte
*dwz_types_ignore
;
3460 offset_type dwz_types_elements_ignore
;
3462 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3464 &dwz
->gdb_index
, &dwz_map
,
3465 &dwz_list
, &dwz_list_elements
,
3467 &dwz_types_elements_ignore
))
3469 warning (_("could not read '.gdb_index' section from %s; skipping"),
3470 bfd_get_filename (dwz
->dwz_bfd
));
3475 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3478 if (types_list_elements
)
3480 struct dwarf2_section_info
*section
;
3482 /* We can only handle a single .debug_types when we have an
3484 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3487 section
= VEC_index (dwarf2_section_info_def
,
3488 dwarf2_per_objfile
->types
, 0);
3490 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3491 types_list_elements
);
3494 create_addrmap_from_index (objfile
, &local_map
);
3496 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3497 map
= new (map
) mapped_index ();
3500 dwarf2_per_objfile
->index_table
= map
;
3501 dwarf2_per_objfile
->using_index
= 1;
3502 dwarf2_per_objfile
->quick_file_names_table
=
3503 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3508 /* A helper for the "quick" functions which sets the global
3509 dwarf2_per_objfile according to OBJFILE. */
3512 dw2_setup (struct objfile
*objfile
)
3514 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
3515 objfile_data (objfile
, dwarf2_objfile_data_key
));
3516 gdb_assert (dwarf2_per_objfile
);
3519 /* die_reader_func for dw2_get_file_names. */
3522 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3523 const gdb_byte
*info_ptr
,
3524 struct die_info
*comp_unit_die
,
3528 struct dwarf2_cu
*cu
= reader
->cu
;
3529 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3530 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3531 struct dwarf2_per_cu_data
*lh_cu
;
3532 struct attribute
*attr
;
3535 struct quick_file_names
*qfn
;
3537 gdb_assert (! this_cu
->is_debug_types
);
3539 /* Our callers never want to match partial units -- instead they
3540 will match the enclosing full CU. */
3541 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3543 this_cu
->v
.quick
->no_file_data
= 1;
3551 sect_offset line_offset
{};
3553 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3556 struct quick_file_names find_entry
;
3558 line_offset
= (sect_offset
) DW_UNSND (attr
);
3560 /* We may have already read in this line header (TU line header sharing).
3561 If we have we're done. */
3562 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3563 find_entry
.hash
.line_sect_off
= line_offset
;
3564 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3565 &find_entry
, INSERT
);
3568 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3572 lh
= dwarf_decode_line_header (line_offset
, cu
);
3576 lh_cu
->v
.quick
->no_file_data
= 1;
3580 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3581 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3582 qfn
->hash
.line_sect_off
= line_offset
;
3583 gdb_assert (slot
!= NULL
);
3586 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3588 qfn
->num_file_names
= lh
->file_names
.size ();
3590 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3591 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3592 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3593 qfn
->real_names
= NULL
;
3595 lh_cu
->v
.quick
->file_names
= qfn
;
3598 /* A helper for the "quick" functions which attempts to read the line
3599 table for THIS_CU. */
3601 static struct quick_file_names
*
3602 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3604 /* This should never be called for TUs. */
3605 gdb_assert (! this_cu
->is_debug_types
);
3606 /* Nor type unit groups. */
3607 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3609 if (this_cu
->v
.quick
->file_names
!= NULL
)
3610 return this_cu
->v
.quick
->file_names
;
3611 /* If we know there is no line data, no point in looking again. */
3612 if (this_cu
->v
.quick
->no_file_data
)
3615 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3617 if (this_cu
->v
.quick
->no_file_data
)
3619 return this_cu
->v
.quick
->file_names
;
3622 /* A helper for the "quick" functions which computes and caches the
3623 real path for a given file name from the line table. */
3626 dw2_get_real_path (struct objfile
*objfile
,
3627 struct quick_file_names
*qfn
, int index
)
3629 if (qfn
->real_names
== NULL
)
3630 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3631 qfn
->num_file_names
, const char *);
3633 if (qfn
->real_names
[index
] == NULL
)
3634 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3636 return qfn
->real_names
[index
];
3639 static struct symtab
*
3640 dw2_find_last_source_symtab (struct objfile
*objfile
)
3642 struct compunit_symtab
*cust
;
3645 dw2_setup (objfile
);
3646 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3647 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3650 return compunit_primary_filetab (cust
);
3653 /* Traversal function for dw2_forget_cached_source_info. */
3656 dw2_free_cached_file_names (void **slot
, void *info
)
3658 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3660 if (file_data
->real_names
)
3664 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3666 xfree ((void*) file_data
->real_names
[i
]);
3667 file_data
->real_names
[i
] = NULL
;
3675 dw2_forget_cached_source_info (struct objfile
*objfile
)
3677 dw2_setup (objfile
);
3679 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3680 dw2_free_cached_file_names
, NULL
);
3683 /* Helper function for dw2_map_symtabs_matching_filename that expands
3684 the symtabs and calls the iterator. */
3687 dw2_map_expand_apply (struct objfile
*objfile
,
3688 struct dwarf2_per_cu_data
*per_cu
,
3689 const char *name
, const char *real_path
,
3690 gdb::function_view
<bool (symtab
*)> callback
)
3692 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3694 /* Don't visit already-expanded CUs. */
3695 if (per_cu
->v
.quick
->compunit_symtab
)
3698 /* This may expand more than one symtab, and we want to iterate over
3700 dw2_instantiate_symtab (per_cu
);
3702 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3703 last_made
, callback
);
3706 /* Implementation of the map_symtabs_matching_filename method. */
3709 dw2_map_symtabs_matching_filename
3710 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3711 gdb::function_view
<bool (symtab
*)> callback
)
3714 const char *name_basename
= lbasename (name
);
3716 dw2_setup (objfile
);
3718 /* The rule is CUs specify all the files, including those used by
3719 any TU, so there's no need to scan TUs here. */
3721 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3724 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3725 struct quick_file_names
*file_data
;
3727 /* We only need to look at symtabs not already expanded. */
3728 if (per_cu
->v
.quick
->compunit_symtab
)
3731 file_data
= dw2_get_file_names (per_cu
);
3732 if (file_data
== NULL
)
3735 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3737 const char *this_name
= file_data
->file_names
[j
];
3738 const char *this_real_name
;
3740 if (compare_filenames_for_search (this_name
, name
))
3742 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3748 /* Before we invoke realpath, which can get expensive when many
3749 files are involved, do a quick comparison of the basenames. */
3750 if (! basenames_may_differ
3751 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3754 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3755 if (compare_filenames_for_search (this_real_name
, name
))
3757 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3763 if (real_path
!= NULL
)
3765 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3766 gdb_assert (IS_ABSOLUTE_PATH (name
));
3767 if (this_real_name
!= NULL
3768 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3770 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3782 /* Struct used to manage iterating over all CUs looking for a symbol. */
3784 struct dw2_symtab_iterator
3786 /* The internalized form of .gdb_index. */
3787 struct mapped_index
*index
;
3788 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3789 int want_specific_block
;
3790 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3791 Unused if !WANT_SPECIFIC_BLOCK. */
3793 /* The kind of symbol we're looking for. */
3795 /* The list of CUs from the index entry of the symbol,
3796 or NULL if not found. */
3798 /* The next element in VEC to look at. */
3800 /* The number of elements in VEC, or zero if there is no match. */
3802 /* Have we seen a global version of the symbol?
3803 If so we can ignore all further global instances.
3804 This is to work around gold/15646, inefficient gold-generated
3809 /* Initialize the index symtab iterator ITER.
3810 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3811 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3814 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3815 struct mapped_index
*index
,
3816 int want_specific_block
,
3821 iter
->index
= index
;
3822 iter
->want_specific_block
= want_specific_block
;
3823 iter
->block_index
= block_index
;
3824 iter
->domain
= domain
;
3826 iter
->global_seen
= 0;
3828 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3829 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3837 /* Return the next matching CU or NULL if there are no more. */
3839 static struct dwarf2_per_cu_data
*
3840 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3842 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3844 offset_type cu_index_and_attrs
=
3845 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3846 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3847 struct dwarf2_per_cu_data
*per_cu
;
3848 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3849 /* This value is only valid for index versions >= 7. */
3850 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3851 gdb_index_symbol_kind symbol_kind
=
3852 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3853 /* Only check the symbol attributes if they're present.
3854 Indices prior to version 7 don't record them,
3855 and indices >= 7 may elide them for certain symbols
3856 (gold does this). */
3858 (iter
->index
->version
>= 7
3859 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3861 /* Don't crash on bad data. */
3862 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3863 + dwarf2_per_objfile
->n_type_units
))
3865 complaint (&symfile_complaints
,
3866 _(".gdb_index entry has bad CU index"
3868 objfile_name (dwarf2_per_objfile
->objfile
));
3872 per_cu
= dw2_get_cutu (cu_index
);
3874 /* Skip if already read in. */
3875 if (per_cu
->v
.quick
->compunit_symtab
)
3878 /* Check static vs global. */
3881 if (iter
->want_specific_block
3882 && want_static
!= is_static
)
3884 /* Work around gold/15646. */
3885 if (!is_static
&& iter
->global_seen
)
3888 iter
->global_seen
= 1;
3891 /* Only check the symbol's kind if it has one. */
3894 switch (iter
->domain
)
3897 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3898 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3899 /* Some types are also in VAR_DOMAIN. */
3900 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3904 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3908 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3923 static struct compunit_symtab
*
3924 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3925 const char *name
, domain_enum domain
)
3927 struct compunit_symtab
*stab_best
= NULL
;
3928 struct mapped_index
*index
;
3930 dw2_setup (objfile
);
3932 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3934 index
= dwarf2_per_objfile
->index_table
;
3936 /* index is NULL if OBJF_READNOW. */
3939 struct dw2_symtab_iterator iter
;
3940 struct dwarf2_per_cu_data
*per_cu
;
3942 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3944 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3946 struct symbol
*sym
, *with_opaque
= NULL
;
3947 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3948 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3949 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3951 sym
= block_find_symbol (block
, name
, domain
,
3952 block_find_non_opaque_type_preferred
,
3955 /* Some caution must be observed with overloaded functions
3956 and methods, since the index will not contain any overload
3957 information (but NAME might contain it). */
3960 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3962 if (with_opaque
!= NULL
3963 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3966 /* Keep looking through other CUs. */
3974 dw2_print_stats (struct objfile
*objfile
)
3976 int i
, total
, count
;
3978 dw2_setup (objfile
);
3979 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3981 for (i
= 0; i
< total
; ++i
)
3983 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3985 if (!per_cu
->v
.quick
->compunit_symtab
)
3988 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3989 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3992 /* This dumps minimal information about the index.
3993 It is called via "mt print objfiles".
3994 One use is to verify .gdb_index has been loaded by the
3995 gdb.dwarf2/gdb-index.exp testcase. */
3998 dw2_dump (struct objfile
*objfile
)
4000 dw2_setup (objfile
);
4001 gdb_assert (dwarf2_per_objfile
->using_index
);
4002 printf_filtered (".gdb_index:");
4003 if (dwarf2_per_objfile
->index_table
!= NULL
)
4005 printf_filtered (" version %d\n",
4006 dwarf2_per_objfile
->index_table
->version
);
4009 printf_filtered (" faked for \"readnow\"\n");
4010 printf_filtered ("\n");
4014 dw2_relocate (struct objfile
*objfile
,
4015 const struct section_offsets
*new_offsets
,
4016 const struct section_offsets
*delta
)
4018 /* There's nothing to relocate here. */
4022 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4023 const char *func_name
)
4025 struct mapped_index
*index
;
4027 dw2_setup (objfile
);
4029 index
= dwarf2_per_objfile
->index_table
;
4031 /* index is NULL if OBJF_READNOW. */
4034 struct dw2_symtab_iterator iter
;
4035 struct dwarf2_per_cu_data
*per_cu
;
4037 /* Note: It doesn't matter what we pass for block_index here. */
4038 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4041 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4042 dw2_instantiate_symtab (per_cu
);
4047 dw2_expand_all_symtabs (struct objfile
*objfile
)
4051 dw2_setup (objfile
);
4053 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4054 + dwarf2_per_objfile
->n_type_units
); ++i
)
4056 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4058 dw2_instantiate_symtab (per_cu
);
4063 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4064 const char *fullname
)
4068 dw2_setup (objfile
);
4070 /* We don't need to consider type units here.
4071 This is only called for examining code, e.g. expand_line_sal.
4072 There can be an order of magnitude (or more) more type units
4073 than comp units, and we avoid them if we can. */
4075 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4078 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4079 struct quick_file_names
*file_data
;
4081 /* We only need to look at symtabs not already expanded. */
4082 if (per_cu
->v
.quick
->compunit_symtab
)
4085 file_data
= dw2_get_file_names (per_cu
);
4086 if (file_data
== NULL
)
4089 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4091 const char *this_fullname
= file_data
->file_names
[j
];
4093 if (filename_cmp (this_fullname
, fullname
) == 0)
4095 dw2_instantiate_symtab (per_cu
);
4103 dw2_map_matching_symbols (struct objfile
*objfile
,
4104 const char * name
, domain_enum domain
,
4106 int (*callback
) (struct block
*,
4107 struct symbol
*, void *),
4108 void *data
, symbol_name_match_type match
,
4109 symbol_compare_ftype
*ordered_compare
)
4111 /* Currently unimplemented; used for Ada. The function can be called if the
4112 current language is Ada for a non-Ada objfile using GNU index. As Ada
4113 does not look for non-Ada symbols this function should just return. */
4116 /* Symbol name matcher for .gdb_index names.
4118 Symbol names in .gdb_index have a few particularities:
4120 - There's no indication of which is the language of each symbol.
4122 Since each language has its own symbol name matching algorithm,
4123 and we don't know which language is the right one, we must match
4124 each symbol against all languages. This would be a potential
4125 performance problem if it were not mitigated by the
4126 mapped_index::name_components lookup table, which significantly
4127 reduces the number of times we need to call into this matcher,
4128 making it a non-issue.
4130 - Symbol names in the index have no overload (parameter)
4131 information. I.e., in C++, "foo(int)" and "foo(long)" both
4132 appear as "foo" in the index, for example.
4134 This means that the lookup names passed to the symbol name
4135 matcher functions must have no parameter information either
4136 because (e.g.) symbol search name "foo" does not match
4137 lookup-name "foo(int)" [while swapping search name for lookup
4140 class gdb_index_symbol_name_matcher
4143 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4144 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4146 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4147 Returns true if any matcher matches. */
4148 bool matches (const char *symbol_name
);
4151 /* A reference to the lookup name we're matching against. */
4152 const lookup_name_info
&m_lookup_name
;
4154 /* A vector holding all the different symbol name matchers, for all
4156 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4159 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4160 (const lookup_name_info
&lookup_name
)
4161 : m_lookup_name (lookup_name
)
4163 /* Prepare the vector of comparison functions upfront, to avoid
4164 doing the same work for each symbol. Care is taken to avoid
4165 matching with the same matcher more than once if/when multiple
4166 languages use the same matcher function. */
4167 auto &matchers
= m_symbol_name_matcher_funcs
;
4168 matchers
.reserve (nr_languages
);
4170 matchers
.push_back (default_symbol_name_matcher
);
4172 for (int i
= 0; i
< nr_languages
; i
++)
4174 const language_defn
*lang
= language_def ((enum language
) i
);
4175 if (lang
->la_get_symbol_name_matcher
!= NULL
)
4177 symbol_name_matcher_ftype
*name_matcher
4178 = lang
->la_get_symbol_name_matcher (m_lookup_name
);
4180 /* Don't insert the same comparison routine more than once.
4181 Note that we do this linear walk instead of a cheaper
4182 sorted insert, or use a std::set or something like that,
4183 because relative order of function addresses is not
4184 stable. This is not a problem in practice because the
4185 number of supported languages is low, and the cost here
4186 is tiny compared to the number of searches we'll do
4187 afterwards using this object. */
4188 if (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4190 matchers
.push_back (name_matcher
);
4196 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4198 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4199 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4205 /* Starting from a search name, return the string that finds the upper
4206 bound of all strings that start with SEARCH_NAME in a sorted name
4207 list. Returns the empty string to indicate that the upper bound is
4208 the end of the list. */
4211 make_sort_after_prefix_name (const char *search_name
)
4213 /* When looking to complete "func", we find the upper bound of all
4214 symbols that start with "func" by looking for where we'd insert
4215 the closest string that would follow "func" in lexicographical
4216 order. Usually, that's "func"-with-last-character-incremented,
4217 i.e. "fund". Mind non-ASCII characters, though. Usually those
4218 will be UTF-8 multi-byte sequences, but we can't be certain.
4219 Especially mind the 0xff character, which is a valid character in
4220 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4221 rule out compilers allowing it in identifiers. Note that
4222 conveniently, strcmp/strcasecmp are specified to compare
4223 characters interpreted as unsigned char. So what we do is treat
4224 the whole string as a base 256 number composed of a sequence of
4225 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4226 to 0, and carries 1 to the following more-significant position.
4227 If the very first character in SEARCH_NAME ends up incremented
4228 and carries/overflows, then the upper bound is the end of the
4229 list. The string after the empty string is also the empty
4232 Some examples of this operation:
4234 SEARCH_NAME => "+1" RESULT
4238 "\xff" "a" "\xff" => "\xff" "b"
4243 Then, with these symbols for example:
4249 completing "func" looks for symbols between "func" and
4250 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4251 which finds "func" and "func1", but not "fund".
4255 funcÿ (Latin1 'ÿ' [0xff])
4259 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4260 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4264 ÿÿ (Latin1 'ÿ' [0xff])
4267 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4268 the end of the list.
4270 std::string after
= search_name
;
4271 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4273 if (!after
.empty ())
4274 after
.back () = (unsigned char) after
.back () + 1;
4278 /* See declaration. */
4280 std::pair
<std::vector
<name_component
>::const_iterator
,
4281 std::vector
<name_component
>::const_iterator
>
4282 mapped_index::find_name_components_bounds
4283 (const lookup_name_info
&lookup_name_without_params
) const
4286 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4289 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4291 /* Comparison function object for lower_bound that matches against a
4292 given symbol name. */
4293 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4296 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4297 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4298 return name_cmp (elem_name
, name
) < 0;
4301 /* Comparison function object for upper_bound that matches against a
4302 given symbol name. */
4303 auto lookup_compare_upper
= [&] (const char *name
,
4304 const name_component
&elem
)
4306 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4307 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4308 return name_cmp (name
, elem_name
) < 0;
4311 auto begin
= this->name_components
.begin ();
4312 auto end
= this->name_components
.end ();
4314 /* Find the lower bound. */
4317 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4320 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4323 /* Find the upper bound. */
4326 if (lookup_name_without_params
.completion_mode ())
4328 /* In completion mode, we want UPPER to point past all
4329 symbols names that have the same prefix. I.e., with
4330 these symbols, and completing "func":
4332 function << lower bound
4334 other_function << upper bound
4336 We find the upper bound by looking for the insertion
4337 point of "func"-with-last-character-incremented,
4339 std::string after
= make_sort_after_prefix_name (cplus
);
4342 return std::upper_bound (lower
, end
, after
.c_str (),
4343 lookup_compare_upper
);
4346 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4349 return {lower
, upper
};
4352 /* See declaration. */
4355 mapped_index::build_name_components ()
4357 if (!this->name_components
.empty ())
4360 this->name_components_casing
= case_sensitivity
;
4362 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4364 /* The code below only knows how to break apart components of C++
4365 symbol names (and other languages that use '::' as
4366 namespace/module separator). If we add support for wild matching
4367 to some language that uses some other operator (E.g., Ada, Go and
4368 D use '.'), then we'll need to try splitting the symbol name
4369 according to that language too. Note that Ada does support wild
4370 matching, but doesn't currently support .gdb_index. */
4371 for (size_t iter
= 0; iter
< this->symbol_table_slots
; ++iter
)
4373 offset_type idx
= 2 * iter
;
4375 if (this->symbol_table
[idx
] == 0
4376 && this->symbol_table
[idx
+ 1] == 0)
4379 const char *name
= this->symbol_name_at (idx
);
4381 /* Add each name component to the name component table. */
4382 unsigned int previous_len
= 0;
4383 for (unsigned int current_len
= cp_find_first_component (name
);
4384 name
[current_len
] != '\0';
4385 current_len
+= cp_find_first_component (name
+ current_len
))
4387 gdb_assert (name
[current_len
] == ':');
4388 this->name_components
.push_back ({previous_len
, idx
});
4389 /* Skip the '::'. */
4391 previous_len
= current_len
;
4393 this->name_components
.push_back ({previous_len
, idx
});
4396 /* Sort name_components elements by name. */
4397 auto name_comp_compare
= [&] (const name_component
&left
,
4398 const name_component
&right
)
4400 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4401 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4403 const char *left_name
= left_qualified
+ left
.name_offset
;
4404 const char *right_name
= right_qualified
+ right
.name_offset
;
4406 return name_cmp (left_name
, right_name
) < 0;
4409 std::sort (this->name_components
.begin (),
4410 this->name_components
.end (),
4414 /* Helper for dw2_expand_symtabs_matching that works with a
4415 mapped_index instead of the containing objfile. This is split to a
4416 separate function in order to be able to unit test the
4417 name_components matching using a mock mapped_index. For each
4418 symbol name that matches, calls MATCH_CALLBACK, passing it the
4419 symbol's index in the mapped_index symbol table. */
4422 dw2_expand_symtabs_matching_symbol
4423 (mapped_index
&index
,
4424 const lookup_name_info
&lookup_name_in
,
4425 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4426 enum search_domain kind
,
4427 gdb::function_view
<void (offset_type
)> match_callback
)
4429 lookup_name_info lookup_name_without_params
4430 = lookup_name_in
.make_ignore_params ();
4431 gdb_index_symbol_name_matcher lookup_name_matcher
4432 (lookup_name_without_params
);
4434 /* Build the symbol name component sorted vector, if we haven't
4436 index
.build_name_components ();
4438 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4440 /* Now for each symbol name in range, check to see if we have a name
4441 match, and if so, call the MATCH_CALLBACK callback. */
4443 /* The same symbol may appear more than once in the range though.
4444 E.g., if we're looking for symbols that complete "w", and we have
4445 a symbol named "w1::w2", we'll find the two name components for
4446 that same symbol in the range. To be sure we only call the
4447 callback once per symbol, we first collect the symbol name
4448 indexes that matched in a temporary vector and ignore
4450 std::vector
<offset_type
> matches
;
4451 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4453 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4455 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4457 if (!lookup_name_matcher
.matches (qualified
)
4458 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4461 matches
.push_back (bounds
.first
->idx
);
4464 std::sort (matches
.begin (), matches
.end ());
4466 /* Finally call the callback, once per match. */
4468 for (offset_type idx
: matches
)
4472 match_callback (idx
);
4477 /* Above we use a type wider than idx's for 'prev', since 0 and
4478 (offset_type)-1 are both possible values. */
4479 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4484 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4486 /* A wrapper around mapped_index that builds a mock mapped_index, from
4487 the symbol list passed as parameter to the constructor. */
4488 class mock_mapped_index
4492 mock_mapped_index (const char *(&symbols
)[N
])
4493 : mock_mapped_index (symbols
, N
)
4496 /* Access the built index. */
4497 mapped_index
&index ()
4501 mock_mapped_index(const mock_mapped_index
&) = delete;
4502 void operator= (const mock_mapped_index
&) = delete;
4505 mock_mapped_index (const char **symbols
, size_t symbols_size
)
4507 /* No string can live at offset zero. Add a dummy entry. */
4508 obstack_grow_str0 (&m_constant_pool
, "");
4510 for (size_t i
= 0; i
< symbols_size
; i
++)
4512 const char *sym
= symbols
[i
];
4513 size_t offset
= obstack_object_size (&m_constant_pool
);
4514 obstack_grow_str0 (&m_constant_pool
, sym
);
4515 m_symbol_table
.push_back (offset
);
4516 m_symbol_table
.push_back (0);
4519 m_index
.constant_pool
= (const char *) obstack_base (&m_constant_pool
);
4520 m_index
.symbol_table
= m_symbol_table
.data ();
4521 m_index
.symbol_table_slots
= m_symbol_table
.size () / 2;
4525 /* The built mapped_index. */
4526 mapped_index m_index
{};
4528 /* The storage that the built mapped_index uses for symbol and
4529 constant pool tables. */
4530 std::vector
<offset_type
> m_symbol_table
;
4531 auto_obstack m_constant_pool
;
4534 /* Convenience function that converts a NULL pointer to a "<null>"
4535 string, to pass to print routines. */
4538 string_or_null (const char *str
)
4540 return str
!= NULL
? str
: "<null>";
4543 /* Check if a lookup_name_info built from
4544 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4545 index. EXPECTED_LIST is the list of expected matches, in expected
4546 matching order. If no match expected, then an empty list is
4547 specified. Returns true on success. On failure prints a warning
4548 indicating the file:line that failed, and returns false. */
4551 check_match (const char *file
, int line
,
4552 mock_mapped_index
&mock_index
,
4553 const char *name
, symbol_name_match_type match_type
,
4554 bool completion_mode
,
4555 std::initializer_list
<const char *> expected_list
)
4557 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4559 bool matched
= true;
4561 auto mismatch
= [&] (const char *expected_str
,
4564 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4565 "expected=\"%s\", got=\"%s\"\n"),
4567 (match_type
== symbol_name_match_type::FULL
4569 name
, string_or_null (expected_str
), string_or_null (got
));
4573 auto expected_it
= expected_list
.begin ();
4574 auto expected_end
= expected_list
.end ();
4576 dw2_expand_symtabs_matching_symbol (mock_index
.index (), lookup_name
,
4578 [&] (offset_type idx
)
4580 const char *matched_name
= mock_index
.index ().symbol_name_at (idx
);
4581 const char *expected_str
4582 = expected_it
== expected_end
? NULL
: *expected_it
++;
4584 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4585 mismatch (expected_str
, matched_name
);
4588 const char *expected_str
4589 = expected_it
== expected_end
? NULL
: *expected_it
++;
4590 if (expected_str
!= NULL
)
4591 mismatch (expected_str
, NULL
);
4596 /* The symbols added to the mock mapped_index for testing (in
4598 static const char *test_symbols
[] = {
4608 /* These are used to check that the increment-last-char in the
4609 matching algorithm for completion doesn't match "t1_fund" when
4610 completing "t1_func". */
4616 /* A UTF-8 name with multi-byte sequences to make sure that
4617 cp-name-parser understands this as a single identifier ("função"
4618 is "function" in PT). */
4621 /* \377 (0xff) is Latin1 'ÿ'. */
4624 /* \377 (0xff) is Latin1 'ÿ'. */
4628 /* A name with all sorts of complications. Starts with "z" to make
4629 it easier for the completion tests below. */
4630 #define Z_SYM_NAME \
4631 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4632 "::tuple<(anonymous namespace)::ui*, " \
4633 "std::default_delete<(anonymous namespace)::ui>, void>"
4638 /* Returns true if the mapped_index::find_name_component_bounds method
4639 finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, in
4643 check_find_bounds_finds (mapped_index
&index
,
4644 const char *search_name
,
4645 gdb::array_view
<const char *> expected_syms
)
4647 lookup_name_info
lookup_name (search_name
,
4648 symbol_name_match_type::FULL
, true);
4650 auto bounds
= index
.find_name_components_bounds (lookup_name
);
4652 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4653 if (distance
!= expected_syms
.size ())
4656 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4658 auto nc_elem
= bounds
.first
+ exp_elem
;
4659 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4660 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4667 /* Test the lower-level mapped_index::find_name_component_bounds
4671 test_mapped_index_find_name_component_bounds ()
4673 mock_mapped_index
mock_index (test_symbols
);
4675 mock_index
.index ().build_name_components ();
4677 /* Test the lower-level mapped_index::find_name_component_bounds
4678 method in completion mode. */
4680 static const char *expected_syms
[] = {
4683 "t1_fund", /* This one's incorrect. */
4686 SELF_CHECK (check_find_bounds_finds (mock_index
.index (),
4687 "t1_func", expected_syms
));
4690 /* Check that the increment-last-char in the name matching algorithm
4691 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4693 static const char *expected_syms1
[] = {
4697 SELF_CHECK (check_find_bounds_finds (mock_index
.index (),
4698 "\377", expected_syms1
));
4700 static const char *expected_syms2
[] = {
4703 SELF_CHECK (check_find_bounds_finds (mock_index
.index (),
4704 "\377\377", expected_syms2
));
4708 /* Test dw2_expand_symtabs_matching_symbol. */
4711 test_dw2_expand_symtabs_matching_symbol ()
4713 mock_mapped_index
mock_index (test_symbols
);
4715 /* We let all tests run until the end even if some fails, for debug
4717 bool any_mismatch
= false;
4719 /* Create the expected symbols list (an initializer_list). Needed
4720 because lists have commas, and we need to pass them to CHECK,
4721 which is a macro. */
4722 #define EXPECT(...) { __VA_ARGS__ }
4724 /* Wrapper for check_match that passes down the current
4725 __FILE__/__LINE__. */
4726 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4727 any_mismatch |= !check_match (__FILE__, __LINE__, \
4729 NAME, MATCH_TYPE, COMPLETION_MODE, \
4732 /* Identity checks. */
4733 for (const char *sym
: test_symbols
)
4735 /* Should be able to match all existing symbols. */
4736 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4739 /* Should be able to match all existing symbols with
4741 std::string with_params
= std::string (sym
) + "(int)";
4742 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4745 /* Should be able to match all existing symbols with
4746 parameters and qualifiers. */
4747 with_params
= std::string (sym
) + " ( int ) const";
4748 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4751 /* This should really find sym, but cp-name-parser.y doesn't
4752 know about lvalue/rvalue qualifiers yet. */
4753 with_params
= std::string (sym
) + " ( int ) &&";
4754 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4758 /* Check that the name matching algorithm for completion doesn't get
4759 confused with Latin1 'ÿ' / 0xff. */
4761 static const char str
[] = "\377";
4762 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4763 EXPECT ("\377", "\377\377123"));
4766 /* Check that the increment-last-char in the matching algorithm for
4767 completion doesn't match "t1_fund" when completing "t1_func". */
4769 static const char str
[] = "t1_func";
4770 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4771 EXPECT ("t1_func", "t1_func1"));
4774 /* Check that completion mode works at each prefix of the expected
4777 static const char str
[] = "function(int)";
4778 size_t len
= strlen (str
);
4781 for (size_t i
= 1; i
< len
; i
++)
4783 lookup
.assign (str
, i
);
4784 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4785 EXPECT ("function"));
4789 /* While "w" is a prefix of both components, the match function
4790 should still only be called once. */
4792 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4796 /* Same, with a "complicated" symbol. */
4798 static const char str
[] = Z_SYM_NAME
;
4799 size_t len
= strlen (str
);
4802 for (size_t i
= 1; i
< len
; i
++)
4804 lookup
.assign (str
, i
);
4805 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4806 EXPECT (Z_SYM_NAME
));
4810 /* In FULL mode, an incomplete symbol doesn't match. */
4812 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4816 /* A complete symbol with parameters matches any overload, since the
4817 index has no overload info. */
4819 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4820 EXPECT ("std::zfunction", "std::zfunction2"));
4823 /* Check that whitespace is ignored appropriately. A symbol with a
4824 template argument list. */
4826 static const char expected
[] = "ns::foo<int>";
4827 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4831 /* Check that whitespace is ignored appropriately. A symbol with a
4832 template argument list that includes a pointer. */
4834 static const char expected
[] = "ns::foo<char*>";
4835 /* Try both completion and non-completion modes. */
4836 static const bool completion_mode
[2] = {false, true};
4837 for (size_t i
= 0; i
< 2; i
++)
4839 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4840 completion_mode
[i
], EXPECT (expected
));
4842 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4843 completion_mode
[i
], EXPECT (expected
));
4848 /* Check method qualifiers are ignored. */
4849 static const char expected
[] = "ns::foo<char*>";
4850 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4851 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4852 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4853 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4856 /* Test lookup names that don't match anything. */
4858 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4862 SELF_CHECK (!any_mismatch
);
4871 test_mapped_index_find_name_component_bounds ();
4872 test_dw2_expand_symtabs_matching_symbol ();
4875 }} // namespace selftests::dw2_expand_symtabs_matching
4877 #endif /* GDB_SELF_TEST */
4879 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4880 matched, to expand corresponding CUs that were marked. IDX is the
4881 index of the symbol name that matched. */
4884 dw2_expand_marked_cus
4885 (mapped_index
&index
, offset_type idx
,
4886 struct objfile
*objfile
,
4887 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4888 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4892 offset_type
*vec
, vec_len
, vec_idx
;
4893 bool global_seen
= false;
4895 vec
= (offset_type
*) (index
.constant_pool
4896 + MAYBE_SWAP (index
.symbol_table
[idx
+ 1]));
4897 vec_len
= MAYBE_SWAP (vec
[0]);
4898 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4900 struct dwarf2_per_cu_data
*per_cu
;
4901 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4902 /* This value is only valid for index versions >= 7. */
4903 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4904 gdb_index_symbol_kind symbol_kind
=
4905 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4906 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4907 /* Only check the symbol attributes if they're present.
4908 Indices prior to version 7 don't record them,
4909 and indices >= 7 may elide them for certain symbols
4910 (gold does this). */
4913 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4915 /* Work around gold/15646. */
4918 if (!is_static
&& global_seen
)
4924 /* Only check the symbol's kind if it has one. */
4929 case VARIABLES_DOMAIN
:
4930 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4933 case FUNCTIONS_DOMAIN
:
4934 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4938 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4946 /* Don't crash on bad data. */
4947 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4948 + dwarf2_per_objfile
->n_type_units
))
4950 complaint (&symfile_complaints
,
4951 _(".gdb_index entry has bad CU index"
4952 " [in module %s]"), objfile_name (objfile
));
4956 per_cu
= dw2_get_cutu (cu_index
);
4957 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4959 int symtab_was_null
=
4960 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4962 dw2_instantiate_symtab (per_cu
);
4964 if (expansion_notify
!= NULL
4966 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4967 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4973 dw2_expand_symtabs_matching
4974 (struct objfile
*objfile
,
4975 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4976 const lookup_name_info
&lookup_name
,
4977 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4978 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4979 enum search_domain kind
)
4984 dw2_setup (objfile
);
4986 /* index_table is NULL if OBJF_READNOW. */
4987 if (!dwarf2_per_objfile
->index_table
)
4990 if (file_matcher
!= NULL
)
4992 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4994 NULL
, xcalloc
, xfree
));
4995 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4997 NULL
, xcalloc
, xfree
));
4999 /* The rule is CUs specify all the files, including those used by
5000 any TU, so there's no need to scan TUs here. */
5002 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5005 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5006 struct quick_file_names
*file_data
;
5011 per_cu
->v
.quick
->mark
= 0;
5013 /* We only need to look at symtabs not already expanded. */
5014 if (per_cu
->v
.quick
->compunit_symtab
)
5017 file_data
= dw2_get_file_names (per_cu
);
5018 if (file_data
== NULL
)
5021 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5023 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5025 per_cu
->v
.quick
->mark
= 1;
5029 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
5031 const char *this_real_name
;
5033 if (file_matcher (file_data
->file_names
[j
], false))
5035 per_cu
->v
.quick
->mark
= 1;
5039 /* Before we invoke realpath, which can get expensive when many
5040 files are involved, do a quick comparison of the basenames. */
5041 if (!basenames_may_differ
5042 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5046 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5047 if (file_matcher (this_real_name
, false))
5049 per_cu
->v
.quick
->mark
= 1;
5054 slot
= htab_find_slot (per_cu
->v
.quick
->mark
5055 ? visited_found
.get ()
5056 : visited_not_found
.get (),
5062 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5064 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5066 kind
, [&] (offset_type idx
)
5068 dw2_expand_marked_cus (index
, idx
, objfile
, file_matcher
,
5069 expansion_notify
, kind
);
5073 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5076 static struct compunit_symtab
*
5077 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5082 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5083 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5086 if (cust
->includes
== NULL
)
5089 for (i
= 0; cust
->includes
[i
]; ++i
)
5091 struct compunit_symtab
*s
= cust
->includes
[i
];
5093 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5101 static struct compunit_symtab
*
5102 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5103 struct bound_minimal_symbol msymbol
,
5105 struct obj_section
*section
,
5108 struct dwarf2_per_cu_data
*data
;
5109 struct compunit_symtab
*result
;
5111 dw2_setup (objfile
);
5113 if (!objfile
->psymtabs_addrmap
)
5116 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
5121 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5122 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5123 paddress (get_objfile_arch (objfile
), pc
));
5126 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
5128 gdb_assert (result
!= NULL
);
5133 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5134 void *data
, int need_fullname
)
5136 dw2_setup (objfile
);
5138 if (!dwarf2_per_objfile
->filenames_cache
)
5140 dwarf2_per_objfile
->filenames_cache
.emplace ();
5142 htab_up
visited (htab_create_alloc (10,
5143 htab_hash_pointer
, htab_eq_pointer
,
5144 NULL
, xcalloc
, xfree
));
5146 /* The rule is CUs specify all the files, including those used
5147 by any TU, so there's no need to scan TUs here. We can
5148 ignore file names coming from already-expanded CUs. */
5150 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5152 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
5154 if (per_cu
->v
.quick
->compunit_symtab
)
5156 void **slot
= htab_find_slot (visited
.get (),
5157 per_cu
->v
.quick
->file_names
,
5160 *slot
= per_cu
->v
.quick
->file_names
;
5164 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5167 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5168 struct quick_file_names
*file_data
;
5171 /* We only need to look at symtabs not already expanded. */
5172 if (per_cu
->v
.quick
->compunit_symtab
)
5175 file_data
= dw2_get_file_names (per_cu
);
5176 if (file_data
== NULL
)
5179 slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5182 /* Already visited. */
5187 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5189 const char *filename
= file_data
->file_names
[j
];
5190 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5195 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5197 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5200 this_real_name
= gdb_realpath (filename
);
5201 (*fun
) (filename
, this_real_name
.get (), data
);
5206 dw2_has_symbols (struct objfile
*objfile
)
5211 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5214 dw2_find_last_source_symtab
,
5215 dw2_forget_cached_source_info
,
5216 dw2_map_symtabs_matching_filename
,
5221 dw2_expand_symtabs_for_function
,
5222 dw2_expand_all_symtabs
,
5223 dw2_expand_symtabs_with_fullname
,
5224 dw2_map_matching_symbols
,
5225 dw2_expand_symtabs_matching
,
5226 dw2_find_pc_sect_compunit_symtab
,
5228 dw2_map_symbol_filenames
5231 /* Initialize for reading DWARF for this objfile. Return 0 if this
5232 file will use psymtabs, or 1 if using the GNU index. */
5235 dwarf2_initialize_objfile (struct objfile
*objfile
)
5237 /* If we're about to read full symbols, don't bother with the
5238 indices. In this case we also don't care if some other debug
5239 format is making psymtabs, because they are all about to be
5241 if ((objfile
->flags
& OBJF_READNOW
))
5245 dwarf2_per_objfile
->using_index
= 1;
5246 create_all_comp_units (objfile
);
5247 create_all_type_units (objfile
);
5248 dwarf2_per_objfile
->quick_file_names_table
=
5249 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
5251 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
5252 + dwarf2_per_objfile
->n_type_units
); ++i
)
5254 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
5256 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5257 struct dwarf2_per_cu_quick_data
);
5260 /* Return 1 so that gdb sees the "quick" functions. However,
5261 these functions will be no-ops because we will have expanded
5266 if (dwarf2_read_index (objfile
))
5274 /* Build a partial symbol table. */
5277 dwarf2_build_psymtabs (struct objfile
*objfile
)
5280 if (objfile
->global_psymbols
.capacity () == 0
5281 && objfile
->static_psymbols
.capacity () == 0)
5282 init_psymbol_list (objfile
, 1024);
5286 /* This isn't really ideal: all the data we allocate on the
5287 objfile's obstack is still uselessly kept around. However,
5288 freeing it seems unsafe. */
5289 psymtab_discarder
psymtabs (objfile
);
5290 dwarf2_build_psymtabs_hard (objfile
);
5293 CATCH (except
, RETURN_MASK_ERROR
)
5295 exception_print (gdb_stderr
, except
);
5300 /* Return the total length of the CU described by HEADER. */
5303 get_cu_length (const struct comp_unit_head
*header
)
5305 return header
->initial_length_size
+ header
->length
;
5308 /* Return TRUE if SECT_OFF is within CU_HEADER. */
5311 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
5313 sect_offset bottom
= cu_header
->sect_off
;
5314 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
5316 return sect_off
>= bottom
&& sect_off
< top
;
5319 /* Find the base address of the compilation unit for range lists and
5320 location lists. It will normally be specified by DW_AT_low_pc.
5321 In DWARF-3 draft 4, the base address could be overridden by
5322 DW_AT_entry_pc. It's been removed, but GCC still uses this for
5323 compilation units with discontinuous ranges. */
5326 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
5328 struct attribute
*attr
;
5331 cu
->base_address
= 0;
5333 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
5336 cu
->base_address
= attr_value_as_address (attr
);
5341 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5344 cu
->base_address
= attr_value_as_address (attr
);
5350 /* Read in the comp unit header information from the debug_info at info_ptr.
5351 Use rcuh_kind::COMPILE as the default type if not known by the caller.
5352 NOTE: This leaves members offset, first_die_offset to be filled in
5355 static const gdb_byte
*
5356 read_comp_unit_head (struct comp_unit_head
*cu_header
,
5357 const gdb_byte
*info_ptr
,
5358 struct dwarf2_section_info
*section
,
5359 rcuh_kind section_kind
)
5362 unsigned int bytes_read
;
5363 const char *filename
= get_section_file_name (section
);
5364 bfd
*abfd
= get_section_bfd_owner (section
);
5366 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
5367 cu_header
->initial_length_size
= bytes_read
;
5368 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
5369 info_ptr
+= bytes_read
;
5370 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
5372 if (cu_header
->version
< 5)
5373 switch (section_kind
)
5375 case rcuh_kind::COMPILE
:
5376 cu_header
->unit_type
= DW_UT_compile
;
5378 case rcuh_kind::TYPE
:
5379 cu_header
->unit_type
= DW_UT_type
;
5382 internal_error (__FILE__
, __LINE__
,
5383 _("read_comp_unit_head: invalid section_kind"));
5387 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
5388 (read_1_byte (abfd
, info_ptr
));
5390 switch (cu_header
->unit_type
)
5393 if (section_kind
!= rcuh_kind::COMPILE
)
5394 error (_("Dwarf Error: wrong unit_type in compilation unit header "
5395 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
5399 section_kind
= rcuh_kind::TYPE
;
5402 error (_("Dwarf Error: wrong unit_type in compilation unit header "
5403 "(is %d, should be %d or %d) [in module %s]"),
5404 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
5407 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
5410 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
5413 info_ptr
+= bytes_read
;
5414 if (cu_header
->version
< 5)
5416 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
5419 signed_addr
= bfd_get_sign_extend_vma (abfd
);
5420 if (signed_addr
< 0)
5421 internal_error (__FILE__
, __LINE__
,
5422 _("read_comp_unit_head: dwarf from non elf file"));
5423 cu_header
->signed_addr_p
= signed_addr
;
5425 if (section_kind
== rcuh_kind::TYPE
)
5427 LONGEST type_offset
;
5429 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
5432 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
5433 info_ptr
+= bytes_read
;
5434 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
5435 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
5436 error (_("Dwarf Error: Too big type_offset in compilation unit "
5437 "header (is %s) [in module %s]"), plongest (type_offset
),
5444 /* Helper function that returns the proper abbrev section for
5447 static struct dwarf2_section_info
*
5448 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
5450 struct dwarf2_section_info
*abbrev
;
5452 if (this_cu
->is_dwz
)
5453 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
5455 abbrev
= &dwarf2_per_objfile
->abbrev
;
5460 /* Subroutine of read_and_check_comp_unit_head and
5461 read_and_check_type_unit_head to simplify them.
5462 Perform various error checking on the header. */
5465 error_check_comp_unit_head (struct comp_unit_head
*header
,
5466 struct dwarf2_section_info
*section
,
5467 struct dwarf2_section_info
*abbrev_section
)
5469 const char *filename
= get_section_file_name (section
);
5471 if (header
->version
< 2 || header
->version
> 5)
5472 error (_("Dwarf Error: wrong version in compilation unit header "
5473 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
5476 if (to_underlying (header
->abbrev_sect_off
)
5477 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
5478 error (_("Dwarf Error: bad offset (0x%x) in compilation unit header "
5479 "(offset 0x%x + 6) [in module %s]"),
5480 to_underlying (header
->abbrev_sect_off
),
5481 to_underlying (header
->sect_off
),
5484 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
5485 avoid potential 32-bit overflow. */
5486 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
5488 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
5489 "(offset 0x%x + 0) [in module %s]"),
5490 header
->length
, to_underlying (header
->sect_off
),
5494 /* Read in a CU/TU header and perform some basic error checking.
5495 The contents of the header are stored in HEADER.
5496 The result is a pointer to the start of the first DIE. */
5498 static const gdb_byte
*
5499 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
5500 struct dwarf2_section_info
*section
,
5501 struct dwarf2_section_info
*abbrev_section
,
5502 const gdb_byte
*info_ptr
,
5503 rcuh_kind section_kind
)
5505 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
5506 bfd
*abfd
= get_section_bfd_owner (section
);
5508 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
5510 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
5512 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
5514 error_check_comp_unit_head (header
, section
, abbrev_section
);
5519 /* Fetch the abbreviation table offset from a comp or type unit header. */
5522 read_abbrev_offset (struct dwarf2_section_info
*section
,
5523 sect_offset sect_off
)
5525 bfd
*abfd
= get_section_bfd_owner (section
);
5526 const gdb_byte
*info_ptr
;
5527 unsigned int initial_length_size
, offset_size
;
5530 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
5531 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
5532 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5533 offset_size
= initial_length_size
== 4 ? 4 : 8;
5534 info_ptr
+= initial_length_size
;
5536 version
= read_2_bytes (abfd
, info_ptr
);
5540 /* Skip unit type and address size. */
5544 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
5547 /* Allocate a new partial symtab for file named NAME and mark this new
5548 partial symtab as being an include of PST. */
5551 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
5552 struct objfile
*objfile
)
5554 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
5556 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
5558 /* It shares objfile->objfile_obstack. */
5559 subpst
->dirname
= pst
->dirname
;
5562 subpst
->textlow
= 0;
5563 subpst
->texthigh
= 0;
5565 subpst
->dependencies
5566 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
5567 subpst
->dependencies
[0] = pst
;
5568 subpst
->number_of_dependencies
= 1;
5570 subpst
->globals_offset
= 0;
5571 subpst
->n_global_syms
= 0;
5572 subpst
->statics_offset
= 0;
5573 subpst
->n_static_syms
= 0;
5574 subpst
->compunit_symtab
= NULL
;
5575 subpst
->read_symtab
= pst
->read_symtab
;
5578 /* No private part is necessary for include psymtabs. This property
5579 can be used to differentiate between such include psymtabs and
5580 the regular ones. */
5581 subpst
->read_symtab_private
= NULL
;
5584 /* Read the Line Number Program data and extract the list of files
5585 included by the source file represented by PST. Build an include
5586 partial symtab for each of these included files. */
5589 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
5590 struct die_info
*die
,
5591 struct partial_symtab
*pst
)
5594 struct attribute
*attr
;
5596 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5598 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
5600 return; /* No linetable, so no includes. */
5602 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
5603 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
5607 hash_signatured_type (const void *item
)
5609 const struct signatured_type
*sig_type
5610 = (const struct signatured_type
*) item
;
5612 /* This drops the top 32 bits of the signature, but is ok for a hash. */
5613 return sig_type
->signature
;
5617 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
5619 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
5620 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
5622 return lhs
->signature
== rhs
->signature
;
5625 /* Allocate a hash table for signatured types. */
5628 allocate_signatured_type_table (struct objfile
*objfile
)
5630 return htab_create_alloc_ex (41,
5631 hash_signatured_type
,
5634 &objfile
->objfile_obstack
,
5635 hashtab_obstack_allocate
,
5636 dummy_obstack_deallocate
);
5639 /* A helper function to add a signatured type CU to a table. */
5642 add_signatured_type_cu_to_table (void **slot
, void *datum
)
5644 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
5645 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
5653 /* A helper for create_debug_types_hash_table. Read types from SECTION
5654 and fill them into TYPES_HTAB. It will process only type units,
5655 therefore DW_UT_type. */
5658 create_debug_type_hash_table (struct dwo_file
*dwo_file
,
5659 dwarf2_section_info
*section
, htab_t
&types_htab
,
5660 rcuh_kind section_kind
)
5662 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5663 struct dwarf2_section_info
*abbrev_section
;
5665 const gdb_byte
*info_ptr
, *end_ptr
;
5667 abbrev_section
= (dwo_file
!= NULL
5668 ? &dwo_file
->sections
.abbrev
5669 : &dwarf2_per_objfile
->abbrev
);
5671 if (dwarf_read_debug
)
5672 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
5673 get_section_name (section
),
5674 get_section_file_name (abbrev_section
));
5676 dwarf2_read_section (objfile
, section
);
5677 info_ptr
= section
->buffer
;
5679 if (info_ptr
== NULL
)
5682 /* We can't set abfd until now because the section may be empty or
5683 not present, in which case the bfd is unknown. */
5684 abfd
= get_section_bfd_owner (section
);
5686 /* We don't use init_cutu_and_read_dies_simple, or some such, here
5687 because we don't need to read any dies: the signature is in the
5690 end_ptr
= info_ptr
+ section
->size
;
5691 while (info_ptr
< end_ptr
)
5693 struct signatured_type
*sig_type
;
5694 struct dwo_unit
*dwo_tu
;
5696 const gdb_byte
*ptr
= info_ptr
;
5697 struct comp_unit_head header
;
5698 unsigned int length
;
5700 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
5702 /* Initialize it due to a false compiler warning. */
5703 header
.signature
= -1;
5704 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
5706 /* We need to read the type's signature in order to build the hash
5707 table, but we don't need anything else just yet. */
5709 ptr
= read_and_check_comp_unit_head (&header
, section
,
5710 abbrev_section
, ptr
, section_kind
);
5712 length
= get_cu_length (&header
);
5714 /* Skip dummy type units. */
5715 if (ptr
>= info_ptr
+ length
5716 || peek_abbrev_code (abfd
, ptr
) == 0
5717 || header
.unit_type
!= DW_UT_type
)
5723 if (types_htab
== NULL
)
5726 types_htab
= allocate_dwo_unit_table (objfile
);
5728 types_htab
= allocate_signatured_type_table (objfile
);
5734 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5736 dwo_tu
->dwo_file
= dwo_file
;
5737 dwo_tu
->signature
= header
.signature
;
5738 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
5739 dwo_tu
->section
= section
;
5740 dwo_tu
->sect_off
= sect_off
;
5741 dwo_tu
->length
= length
;
5745 /* N.B.: type_offset is not usable if this type uses a DWO file.
5746 The real type_offset is in the DWO file. */
5748 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5749 struct signatured_type
);
5750 sig_type
->signature
= header
.signature
;
5751 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
5752 sig_type
->per_cu
.objfile
= objfile
;
5753 sig_type
->per_cu
.is_debug_types
= 1;
5754 sig_type
->per_cu
.section
= section
;
5755 sig_type
->per_cu
.sect_off
= sect_off
;
5756 sig_type
->per_cu
.length
= length
;
5759 slot
= htab_find_slot (types_htab
,
5760 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
5762 gdb_assert (slot
!= NULL
);
5765 sect_offset dup_sect_off
;
5769 const struct dwo_unit
*dup_tu
5770 = (const struct dwo_unit
*) *slot
;
5772 dup_sect_off
= dup_tu
->sect_off
;
5776 const struct signatured_type
*dup_tu
5777 = (const struct signatured_type
*) *slot
;
5779 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
5782 complaint (&symfile_complaints
,
5783 _("debug type entry at offset 0x%x is duplicate to"
5784 " the entry at offset 0x%x, signature %s"),
5785 to_underlying (sect_off
), to_underlying (dup_sect_off
),
5786 hex_string (header
.signature
));
5788 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
5790 if (dwarf_read_debug
> 1)
5791 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
5792 to_underlying (sect_off
),
5793 hex_string (header
.signature
));
5799 /* Create the hash table of all entries in the .debug_types
5800 (or .debug_types.dwo) section(s).
5801 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
5802 otherwise it is NULL.
5804 The result is a pointer to the hash table or NULL if there are no types.
5806 Note: This function processes DWO files only, not DWP files. */
5809 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
5810 VEC (dwarf2_section_info_def
) *types
,
5814 struct dwarf2_section_info
*section
;
5816 if (VEC_empty (dwarf2_section_info_def
, types
))
5820 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
5822 create_debug_type_hash_table (dwo_file
, section
, types_htab
,
5826 /* Create the hash table of all entries in the .debug_types section,
5827 and initialize all_type_units.
5828 The result is zero if there is an error (e.g. missing .debug_types section),
5829 otherwise non-zero. */
5832 create_all_type_units (struct objfile
*objfile
)
5834 htab_t types_htab
= NULL
;
5835 struct signatured_type
**iter
;
5837 create_debug_type_hash_table (NULL
, &dwarf2_per_objfile
->info
, types_htab
,
5838 rcuh_kind::COMPILE
);
5839 create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
, types_htab
);
5840 if (types_htab
== NULL
)
5842 dwarf2_per_objfile
->signatured_types
= NULL
;
5846 dwarf2_per_objfile
->signatured_types
= types_htab
;
5848 dwarf2_per_objfile
->n_type_units
5849 = dwarf2_per_objfile
->n_allocated_type_units
5850 = htab_elements (types_htab
);
5851 dwarf2_per_objfile
->all_type_units
=
5852 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
5853 iter
= &dwarf2_per_objfile
->all_type_units
[0];
5854 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
5855 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
5856 == dwarf2_per_objfile
->n_type_units
);
5861 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
5862 If SLOT is non-NULL, it is the entry to use in the hash table.
5863 Otherwise we find one. */
5865 static struct signatured_type
*
5866 add_type_unit (ULONGEST sig
, void **slot
)
5868 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5869 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
5870 struct signatured_type
*sig_type
;
5872 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
5874 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
5876 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
5877 dwarf2_per_objfile
->n_allocated_type_units
= 1;
5878 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
5879 dwarf2_per_objfile
->all_type_units
5880 = XRESIZEVEC (struct signatured_type
*,
5881 dwarf2_per_objfile
->all_type_units
,
5882 dwarf2_per_objfile
->n_allocated_type_units
);
5883 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
5885 dwarf2_per_objfile
->n_type_units
= n_type_units
;
5887 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5888 struct signatured_type
);
5889 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
5890 sig_type
->signature
= sig
;
5891 sig_type
->per_cu
.is_debug_types
= 1;
5892 if (dwarf2_per_objfile
->using_index
)
5894 sig_type
->per_cu
.v
.quick
=
5895 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5896 struct dwarf2_per_cu_quick_data
);
5901 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5904 gdb_assert (*slot
== NULL
);
5906 /* The rest of sig_type must be filled in by the caller. */
5910 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
5911 Fill in SIG_ENTRY with DWO_ENTRY. */
5914 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
5915 struct signatured_type
*sig_entry
,
5916 struct dwo_unit
*dwo_entry
)
5918 /* Make sure we're not clobbering something we don't expect to. */
5919 gdb_assert (! sig_entry
->per_cu
.queued
);
5920 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
5921 if (dwarf2_per_objfile
->using_index
)
5923 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
5924 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
5927 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
5928 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
5929 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
5930 gdb_assert (sig_entry
->type_unit_group
== NULL
);
5931 gdb_assert (sig_entry
->dwo_unit
== NULL
);
5933 sig_entry
->per_cu
.section
= dwo_entry
->section
;
5934 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
5935 sig_entry
->per_cu
.length
= dwo_entry
->length
;
5936 sig_entry
->per_cu
.reading_dwo_directly
= 1;
5937 sig_entry
->per_cu
.objfile
= objfile
;
5938 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
5939 sig_entry
->dwo_unit
= dwo_entry
;
5942 /* Subroutine of lookup_signatured_type.
5943 If we haven't read the TU yet, create the signatured_type data structure
5944 for a TU to be read in directly from a DWO file, bypassing the stub.
5945 This is the "Stay in DWO Optimization": When there is no DWP file and we're
5946 using .gdb_index, then when reading a CU we want to stay in the DWO file
5947 containing that CU. Otherwise we could end up reading several other DWO
5948 files (due to comdat folding) to process the transitive closure of all the
5949 mentioned TUs, and that can be slow. The current DWO file will have every
5950 type signature that it needs.
5951 We only do this for .gdb_index because in the psymtab case we already have
5952 to read all the DWOs to build the type unit groups. */
5954 static struct signatured_type
*
5955 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5957 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5958 struct dwo_file
*dwo_file
;
5959 struct dwo_unit find_dwo_entry
, *dwo_entry
;
5960 struct signatured_type find_sig_entry
, *sig_entry
;
5963 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
5965 /* If TU skeletons have been removed then we may not have read in any
5967 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5969 dwarf2_per_objfile
->signatured_types
5970 = allocate_signatured_type_table (objfile
);
5973 /* We only ever need to read in one copy of a signatured type.
5974 Use the global signatured_types array to do our own comdat-folding
5975 of types. If this is the first time we're reading this TU, and
5976 the TU has an entry in .gdb_index, replace the recorded data from
5977 .gdb_index with this TU. */
5979 find_sig_entry
.signature
= sig
;
5980 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5981 &find_sig_entry
, INSERT
);
5982 sig_entry
= (struct signatured_type
*) *slot
;
5984 /* We can get here with the TU already read, *or* in the process of being
5985 read. Don't reassign the global entry to point to this DWO if that's
5986 the case. Also note that if the TU is already being read, it may not
5987 have come from a DWO, the program may be a mix of Fission-compiled
5988 code and non-Fission-compiled code. */
5990 /* Have we already tried to read this TU?
5991 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
5992 needn't exist in the global table yet). */
5993 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
5996 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
5997 dwo_unit of the TU itself. */
5998 dwo_file
= cu
->dwo_unit
->dwo_file
;
6000 /* Ok, this is the first time we're reading this TU. */
6001 if (dwo_file
->tus
== NULL
)
6003 find_dwo_entry
.signature
= sig
;
6004 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
6005 if (dwo_entry
== NULL
)
6008 /* If the global table doesn't have an entry for this TU, add one. */
6009 if (sig_entry
== NULL
)
6010 sig_entry
= add_type_unit (sig
, slot
);
6012 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
6013 sig_entry
->per_cu
.tu_read
= 1;
6017 /* Subroutine of lookup_signatured_type.
6018 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6019 then try the DWP file. If the TU stub (skeleton) has been removed then
6020 it won't be in .gdb_index. */
6022 static struct signatured_type
*
6023 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6025 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6026 struct dwp_file
*dwp_file
= get_dwp_file ();
6027 struct dwo_unit
*dwo_entry
;
6028 struct signatured_type find_sig_entry
, *sig_entry
;
6031 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6032 gdb_assert (dwp_file
!= NULL
);
6034 /* If TU skeletons have been removed then we may not have read in any
6036 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6038 dwarf2_per_objfile
->signatured_types
6039 = allocate_signatured_type_table (objfile
);
6042 find_sig_entry
.signature
= sig
;
6043 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6044 &find_sig_entry
, INSERT
);
6045 sig_entry
= (struct signatured_type
*) *slot
;
6047 /* Have we already tried to read this TU?
6048 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6049 needn't exist in the global table yet). */
6050 if (sig_entry
!= NULL
)
6053 if (dwp_file
->tus
== NULL
)
6055 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
6056 sig
, 1 /* is_debug_types */);
6057 if (dwo_entry
== NULL
)
6060 sig_entry
= add_type_unit (sig
, slot
);
6061 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
6066 /* Lookup a signature based type for DW_FORM_ref_sig8.
6067 Returns NULL if signature SIG is not present in the table.
6068 It is up to the caller to complain about this. */
6070 static struct signatured_type
*
6071 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6074 && dwarf2_per_objfile
->using_index
)
6076 /* We're in a DWO/DWP file, and we're using .gdb_index.
6077 These cases require special processing. */
6078 if (get_dwp_file () == NULL
)
6079 return lookup_dwo_signatured_type (cu
, sig
);
6081 return lookup_dwp_signatured_type (cu
, sig
);
6085 struct signatured_type find_entry
, *entry
;
6087 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6089 find_entry
.signature
= sig
;
6090 entry
= ((struct signatured_type
*)
6091 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
6096 /* Low level DIE reading support. */
6098 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6101 init_cu_die_reader (struct die_reader_specs
*reader
,
6102 struct dwarf2_cu
*cu
,
6103 struct dwarf2_section_info
*section
,
6104 struct dwo_file
*dwo_file
)
6106 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6107 reader
->abfd
= get_section_bfd_owner (section
);
6109 reader
->dwo_file
= dwo_file
;
6110 reader
->die_section
= section
;
6111 reader
->buffer
= section
->buffer
;
6112 reader
->buffer_end
= section
->buffer
+ section
->size
;
6113 reader
->comp_dir
= NULL
;
6116 /* Subroutine of init_cutu_and_read_dies to simplify it.
6117 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6118 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
6121 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6122 from it to the DIE in the DWO. If NULL we are skipping the stub.
6123 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6124 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6125 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6126 STUB_COMP_DIR may be non-NULL.
6127 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
6128 are filled in with the info of the DIE from the DWO file.
6129 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
6130 provided an abbrev table to use.
6131 The result is non-zero if a valid (non-dummy) DIE was found. */
6134 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
6135 struct dwo_unit
*dwo_unit
,
6136 int abbrev_table_provided
,
6137 struct die_info
*stub_comp_unit_die
,
6138 const char *stub_comp_dir
,
6139 struct die_reader_specs
*result_reader
,
6140 const gdb_byte
**result_info_ptr
,
6141 struct die_info
**result_comp_unit_die
,
6142 int *result_has_children
)
6144 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6145 struct dwarf2_cu
*cu
= this_cu
->cu
;
6146 struct dwarf2_section_info
*section
;
6148 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6149 ULONGEST signature
; /* Or dwo_id. */
6150 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6151 int i
,num_extra_attrs
;
6152 struct dwarf2_section_info
*dwo_abbrev_section
;
6153 struct attribute
*attr
;
6154 struct die_info
*comp_unit_die
;
6156 /* At most one of these may be provided. */
6157 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6159 /* These attributes aren't processed until later:
6160 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6161 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6162 referenced later. However, these attributes are found in the stub
6163 which we won't have later. In order to not impose this complication
6164 on the rest of the code, we read them here and copy them to the
6173 if (stub_comp_unit_die
!= NULL
)
6175 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6177 if (! this_cu
->is_debug_types
)
6178 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6179 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6180 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6181 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6182 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6184 /* There should be a DW_AT_addr_base attribute here (if needed).
6185 We need the value before we can process DW_FORM_GNU_addr_index. */
6187 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
6189 cu
->addr_base
= DW_UNSND (attr
);
6191 /* There should be a DW_AT_ranges_base attribute here (if needed).
6192 We need the value before we can process DW_AT_ranges. */
6193 cu
->ranges_base
= 0;
6194 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
6196 cu
->ranges_base
= DW_UNSND (attr
);
6198 else if (stub_comp_dir
!= NULL
)
6200 /* Reconstruct the comp_dir attribute to simplify the code below. */
6201 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6202 comp_dir
->name
= DW_AT_comp_dir
;
6203 comp_dir
->form
= DW_FORM_string
;
6204 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6205 DW_STRING (comp_dir
) = stub_comp_dir
;
6208 /* Set up for reading the DWO CU/TU. */
6209 cu
->dwo_unit
= dwo_unit
;
6210 section
= dwo_unit
->section
;
6211 dwarf2_read_section (objfile
, section
);
6212 abfd
= get_section_bfd_owner (section
);
6213 begin_info_ptr
= info_ptr
= (section
->buffer
6214 + to_underlying (dwo_unit
->sect_off
));
6215 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6216 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
6218 if (this_cu
->is_debug_types
)
6220 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
6222 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
6224 info_ptr
, rcuh_kind::TYPE
);
6225 /* This is not an assert because it can be caused by bad debug info. */
6226 if (sig_type
->signature
!= cu
->header
.signature
)
6228 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6229 " TU at offset 0x%x [in module %s]"),
6230 hex_string (sig_type
->signature
),
6231 hex_string (cu
->header
.signature
),
6232 to_underlying (dwo_unit
->sect_off
),
6233 bfd_get_filename (abfd
));
6235 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6236 /* For DWOs coming from DWP files, we don't know the CU length
6237 nor the type's offset in the TU until now. */
6238 dwo_unit
->length
= get_cu_length (&cu
->header
);
6239 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6241 /* Establish the type offset that can be used to lookup the type.
6242 For DWO files, we don't know it until now. */
6243 sig_type
->type_offset_in_section
6244 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6248 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
6250 info_ptr
, rcuh_kind::COMPILE
);
6251 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6252 /* For DWOs coming from DWP files, we don't know the CU length
6254 dwo_unit
->length
= get_cu_length (&cu
->header
);
6257 /* Replace the CU's original abbrev table with the DWO's.
6258 Reminder: We can't read the abbrev table until we've read the header. */
6259 if (abbrev_table_provided
)
6261 /* Don't free the provided abbrev table, the caller of
6262 init_cutu_and_read_dies owns it. */
6263 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
6264 /* Ensure the DWO abbrev table gets freed. */
6265 make_cleanup (dwarf2_free_abbrev_table
, cu
);
6269 dwarf2_free_abbrev_table (cu
);
6270 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
6271 /* Leave any existing abbrev table cleanup as is. */
6274 /* Read in the die, but leave space to copy over the attributes
6275 from the stub. This has the benefit of simplifying the rest of
6276 the code - all the work to maintain the illusion of a single
6277 DW_TAG_{compile,type}_unit DIE is done here. */
6278 num_extra_attrs
= ((stmt_list
!= NULL
)
6282 + (comp_dir
!= NULL
));
6283 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6284 result_has_children
, num_extra_attrs
);
6286 /* Copy over the attributes from the stub to the DIE we just read in. */
6287 comp_unit_die
= *result_comp_unit_die
;
6288 i
= comp_unit_die
->num_attrs
;
6289 if (stmt_list
!= NULL
)
6290 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6292 comp_unit_die
->attrs
[i
++] = *low_pc
;
6293 if (high_pc
!= NULL
)
6294 comp_unit_die
->attrs
[i
++] = *high_pc
;
6296 comp_unit_die
->attrs
[i
++] = *ranges
;
6297 if (comp_dir
!= NULL
)
6298 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6299 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6301 if (dwarf_die_debug
)
6303 fprintf_unfiltered (gdb_stdlog
,
6304 "Read die from %s@0x%x of %s:\n",
6305 get_section_name (section
),
6306 (unsigned) (begin_info_ptr
- section
->buffer
),
6307 bfd_get_filename (abfd
));
6308 dump_die (comp_unit_die
, dwarf_die_debug
);
6311 /* Save the comp_dir attribute. If there is no DWP file then we'll read
6312 TUs by skipping the stub and going directly to the entry in the DWO file.
6313 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
6314 to get it via circuitous means. Blech. */
6315 if (comp_dir
!= NULL
)
6316 result_reader
->comp_dir
= DW_STRING (comp_dir
);
6318 /* Skip dummy compilation units. */
6319 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6320 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6323 *result_info_ptr
= info_ptr
;
6327 /* Subroutine of init_cutu_and_read_dies to simplify it.
6328 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6329 Returns NULL if the specified DWO unit cannot be found. */
6331 static struct dwo_unit
*
6332 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
6333 struct die_info
*comp_unit_die
)
6335 struct dwarf2_cu
*cu
= this_cu
->cu
;
6336 struct attribute
*attr
;
6338 struct dwo_unit
*dwo_unit
;
6339 const char *comp_dir
, *dwo_name
;
6341 gdb_assert (cu
!= NULL
);
6343 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6344 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
6345 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6347 if (this_cu
->is_debug_types
)
6349 struct signatured_type
*sig_type
;
6351 /* Since this_cu is the first member of struct signatured_type,
6352 we can go from a pointer to one to a pointer to the other. */
6353 sig_type
= (struct signatured_type
*) this_cu
;
6354 signature
= sig_type
->signature
;
6355 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
6359 struct attribute
*attr
;
6361 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6363 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6365 dwo_name
, objfile_name (this_cu
->objfile
));
6366 signature
= DW_UNSND (attr
);
6367 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
6374 /* Subroutine of init_cutu_and_read_dies to simplify it.
6375 See it for a description of the parameters.
6376 Read a TU directly from a DWO file, bypassing the stub.
6378 Note: This function could be a little bit simpler if we shared cleanups
6379 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
6380 to do, so we keep this function self-contained. Or we could move this
6381 into our caller, but it's complex enough already. */
6384 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
6385 int use_existing_cu
, int keep
,
6386 die_reader_func_ftype
*die_reader_func
,
6389 struct dwarf2_cu
*cu
;
6390 struct signatured_type
*sig_type
;
6391 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
6392 struct die_reader_specs reader
;
6393 const gdb_byte
*info_ptr
;
6394 struct die_info
*comp_unit_die
;
6397 /* Verify we can do the following downcast, and that we have the
6399 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6400 sig_type
= (struct signatured_type
*) this_cu
;
6401 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6403 cleanups
= make_cleanup (null_cleanup
, NULL
);
6405 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6407 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6409 /* There's no need to do the rereading_dwo_cu handling that
6410 init_cutu_and_read_dies does since we don't read the stub. */
6414 /* If !use_existing_cu, this_cu->cu must be NULL. */
6415 gdb_assert (this_cu
->cu
== NULL
);
6416 cu
= XNEW (struct dwarf2_cu
);
6417 init_one_comp_unit (cu
, this_cu
);
6418 /* If an error occurs while loading, release our storage. */
6419 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
6422 /* A future optimization, if needed, would be to use an existing
6423 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6424 could share abbrev tables. */
6426 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
6427 0 /* abbrev_table_provided */,
6428 NULL
/* stub_comp_unit_die */,
6429 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6431 &comp_unit_die
, &has_children
) == 0)
6434 do_cleanups (cleanups
);
6438 /* All the "real" work is done here. */
6439 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
6441 /* This duplicates the code in init_cutu_and_read_dies,
6442 but the alternative is making the latter more complex.
6443 This function is only for the special case of using DWO files directly:
6444 no point in overly complicating the general case just to handle this. */
6445 if (free_cu_cleanup
!= NULL
)
6449 /* We've successfully allocated this compilation unit. Let our
6450 caller clean it up when finished with it. */
6451 discard_cleanups (free_cu_cleanup
);
6453 /* We can only discard free_cu_cleanup and all subsequent cleanups.
6454 So we have to manually free the abbrev table. */
6455 dwarf2_free_abbrev_table (cu
);
6457 /* Link this CU into read_in_chain. */
6458 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6459 dwarf2_per_objfile
->read_in_chain
= this_cu
;
6462 do_cleanups (free_cu_cleanup
);
6465 do_cleanups (cleanups
);
6468 /* Initialize a CU (or TU) and read its DIEs.
6469 If the CU defers to a DWO file, read the DWO file as well.
6471 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6472 Otherwise the table specified in the comp unit header is read in and used.
6473 This is an optimization for when we already have the abbrev table.
6475 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6476 Otherwise, a new CU is allocated with xmalloc.
6478 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
6479 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
6481 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
6482 linker) then DIE_READER_FUNC will not get called. */
6485 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
6486 struct abbrev_table
*abbrev_table
,
6487 int use_existing_cu
, int keep
,
6488 die_reader_func_ftype
*die_reader_func
,
6491 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6492 struct dwarf2_section_info
*section
= this_cu
->section
;
6493 bfd
*abfd
= get_section_bfd_owner (section
);
6494 struct dwarf2_cu
*cu
;
6495 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6496 struct die_reader_specs reader
;
6497 struct die_info
*comp_unit_die
;
6499 struct attribute
*attr
;
6500 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
6501 struct signatured_type
*sig_type
= NULL
;
6502 struct dwarf2_section_info
*abbrev_section
;
6503 /* Non-zero if CU currently points to a DWO file and we need to
6504 reread it. When this happens we need to reread the skeleton die
6505 before we can reread the DWO file (this only applies to CUs, not TUs). */
6506 int rereading_dwo_cu
= 0;
6508 if (dwarf_die_debug
)
6509 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
6510 this_cu
->is_debug_types
? "type" : "comp",
6511 to_underlying (this_cu
->sect_off
));
6513 if (use_existing_cu
)
6516 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6517 file (instead of going through the stub), short-circuit all of this. */
6518 if (this_cu
->reading_dwo_directly
)
6520 /* Narrow down the scope of possibilities to have to understand. */
6521 gdb_assert (this_cu
->is_debug_types
);
6522 gdb_assert (abbrev_table
== NULL
);
6523 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
6524 die_reader_func
, data
);
6528 cleanups
= make_cleanup (null_cleanup
, NULL
);
6530 /* This is cheap if the section is already read in. */
6531 dwarf2_read_section (objfile
, section
);
6533 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6535 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
6537 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6540 /* If this CU is from a DWO file we need to start over, we need to
6541 refetch the attributes from the skeleton CU.
6542 This could be optimized by retrieving those attributes from when we
6543 were here the first time: the previous comp_unit_die was stored in
6544 comp_unit_obstack. But there's no data yet that we need this
6546 if (cu
->dwo_unit
!= NULL
)
6547 rereading_dwo_cu
= 1;
6551 /* If !use_existing_cu, this_cu->cu must be NULL. */
6552 gdb_assert (this_cu
->cu
== NULL
);
6553 cu
= XNEW (struct dwarf2_cu
);
6554 init_one_comp_unit (cu
, this_cu
);
6555 /* If an error occurs while loading, release our storage. */
6556 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
6559 /* Get the header. */
6560 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
6562 /* We already have the header, there's no need to read it in again. */
6563 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
6567 if (this_cu
->is_debug_types
)
6569 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
6570 abbrev_section
, info_ptr
,
6573 /* Since per_cu is the first member of struct signatured_type,
6574 we can go from a pointer to one to a pointer to the other. */
6575 sig_type
= (struct signatured_type
*) this_cu
;
6576 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
6577 gdb_assert (sig_type
->type_offset_in_tu
6578 == cu
->header
.type_cu_offset_in_tu
);
6579 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6581 /* LENGTH has not been set yet for type units if we're
6582 using .gdb_index. */
6583 this_cu
->length
= get_cu_length (&cu
->header
);
6585 /* Establish the type offset that can be used to lookup the type. */
6586 sig_type
->type_offset_in_section
=
6587 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
6589 this_cu
->dwarf_version
= cu
->header
.version
;
6593 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
6596 rcuh_kind::COMPILE
);
6598 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6599 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
6600 this_cu
->dwarf_version
= cu
->header
.version
;
6604 /* Skip dummy compilation units. */
6605 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
6606 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6608 do_cleanups (cleanups
);
6612 /* If we don't have them yet, read the abbrevs for this compilation unit.
6613 And if we need to read them now, make sure they're freed when we're
6614 done. Note that it's important that if the CU had an abbrev table
6615 on entry we don't free it when we're done: Somewhere up the call stack
6616 it may be in use. */
6617 if (abbrev_table
!= NULL
)
6619 gdb_assert (cu
->abbrev_table
== NULL
);
6620 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
6621 cu
->abbrev_table
= abbrev_table
;
6623 else if (cu
->abbrev_table
== NULL
)
6625 dwarf2_read_abbrevs (cu
, abbrev_section
);
6626 make_cleanup (dwarf2_free_abbrev_table
, cu
);
6628 else if (rereading_dwo_cu
)
6630 dwarf2_free_abbrev_table (cu
);
6631 dwarf2_read_abbrevs (cu
, abbrev_section
);
6634 /* Read the top level CU/TU die. */
6635 init_cu_die_reader (&reader
, cu
, section
, NULL
);
6636 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
6638 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
6640 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
6641 DWO CU, that this test will fail (the attribute will not be present). */
6642 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
6645 struct dwo_unit
*dwo_unit
;
6646 struct die_info
*dwo_comp_unit_die
;
6650 complaint (&symfile_complaints
,
6651 _("compilation unit with DW_AT_GNU_dwo_name"
6652 " has children (offset 0x%x) [in module %s]"),
6653 to_underlying (this_cu
->sect_off
), bfd_get_filename (abfd
));
6655 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
6656 if (dwo_unit
!= NULL
)
6658 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
6659 abbrev_table
!= NULL
,
6660 comp_unit_die
, NULL
,
6662 &dwo_comp_unit_die
, &has_children
) == 0)
6665 do_cleanups (cleanups
);
6668 comp_unit_die
= dwo_comp_unit_die
;
6672 /* Yikes, we couldn't find the rest of the DIE, we only have
6673 the stub. A complaint has already been logged. There's
6674 not much more we can do except pass on the stub DIE to
6675 die_reader_func. We don't want to throw an error on bad
6680 /* All of the above is setup for this call. Yikes. */
6681 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
6683 /* Done, clean up. */
6684 if (free_cu_cleanup
!= NULL
)
6688 /* We've successfully allocated this compilation unit. Let our
6689 caller clean it up when finished with it. */
6690 discard_cleanups (free_cu_cleanup
);
6692 /* We can only discard free_cu_cleanup and all subsequent cleanups.
6693 So we have to manually free the abbrev table. */
6694 dwarf2_free_abbrev_table (cu
);
6696 /* Link this CU into read_in_chain. */
6697 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6698 dwarf2_per_objfile
->read_in_chain
= this_cu
;
6701 do_cleanups (free_cu_cleanup
);
6704 do_cleanups (cleanups
);
6707 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
6708 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
6709 to have already done the lookup to find the DWO file).
6711 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
6712 THIS_CU->is_debug_types, but nothing else.
6714 We fill in THIS_CU->length.
6716 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
6717 linker) then DIE_READER_FUNC will not get called.
6719 THIS_CU->cu is always freed when done.
6720 This is done in order to not leave THIS_CU->cu in a state where we have
6721 to care whether it refers to the "main" CU or the DWO CU. */
6724 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
6725 struct dwo_file
*dwo_file
,
6726 die_reader_func_ftype
*die_reader_func
,
6729 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6730 struct dwarf2_section_info
*section
= this_cu
->section
;
6731 bfd
*abfd
= get_section_bfd_owner (section
);
6732 struct dwarf2_section_info
*abbrev_section
;
6733 struct dwarf2_cu cu
;
6734 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6735 struct die_reader_specs reader
;
6736 struct cleanup
*cleanups
;
6737 struct die_info
*comp_unit_die
;
6740 if (dwarf_die_debug
)
6741 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
6742 this_cu
->is_debug_types
? "type" : "comp",
6743 to_underlying (this_cu
->sect_off
));
6745 gdb_assert (this_cu
->cu
== NULL
);
6747 abbrev_section
= (dwo_file
!= NULL
6748 ? &dwo_file
->sections
.abbrev
6749 : get_abbrev_section_for_cu (this_cu
));
6751 /* This is cheap if the section is already read in. */
6752 dwarf2_read_section (objfile
, section
);
6754 init_one_comp_unit (&cu
, this_cu
);
6756 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
6758 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6759 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
6760 abbrev_section
, info_ptr
,
6761 (this_cu
->is_debug_types
6763 : rcuh_kind::COMPILE
));
6765 this_cu
->length
= get_cu_length (&cu
.header
);
6767 /* Skip dummy compilation units. */
6768 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
6769 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6771 do_cleanups (cleanups
);
6775 dwarf2_read_abbrevs (&cu
, abbrev_section
);
6776 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
6778 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
6779 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
6781 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
6783 do_cleanups (cleanups
);
6786 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
6787 does not lookup the specified DWO file.
6788 This cannot be used to read DWO files.
6790 THIS_CU->cu is always freed when done.
6791 This is done in order to not leave THIS_CU->cu in a state where we have
6792 to care whether it refers to the "main" CU or the DWO CU.
6793 We can revisit this if the data shows there's a performance issue. */
6796 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
6797 die_reader_func_ftype
*die_reader_func
,
6800 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
6803 /* Type Unit Groups.
6805 Type Unit Groups are a way to collapse the set of all TUs (type units) into
6806 a more manageable set. The grouping is done by DW_AT_stmt_list entry
6807 so that all types coming from the same compilation (.o file) are grouped
6808 together. A future step could be to put the types in the same symtab as
6809 the CU the types ultimately came from. */
6812 hash_type_unit_group (const void *item
)
6814 const struct type_unit_group
*tu_group
6815 = (const struct type_unit_group
*) item
;
6817 return hash_stmt_list_entry (&tu_group
->hash
);
6821 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
6823 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
6824 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
6826 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
6829 /* Allocate a hash table for type unit groups. */
6832 allocate_type_unit_groups_table (void)
6834 return htab_create_alloc_ex (3,
6835 hash_type_unit_group
,
6838 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
6839 hashtab_obstack_allocate
,
6840 dummy_obstack_deallocate
);
6843 /* Type units that don't have DW_AT_stmt_list are grouped into their own
6844 partial symtabs. We combine several TUs per psymtab to not let the size
6845 of any one psymtab grow too big. */
6846 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
6847 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
6849 /* Helper routine for get_type_unit_group.
6850 Create the type_unit_group object used to hold one or more TUs. */
6852 static struct type_unit_group
*
6853 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
6855 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6856 struct dwarf2_per_cu_data
*per_cu
;
6857 struct type_unit_group
*tu_group
;
6859 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6860 struct type_unit_group
);
6861 per_cu
= &tu_group
->per_cu
;
6862 per_cu
->objfile
= objfile
;
6864 if (dwarf2_per_objfile
->using_index
)
6866 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6867 struct dwarf2_per_cu_quick_data
);
6871 unsigned int line_offset
= to_underlying (line_offset_struct
);
6872 struct partial_symtab
*pst
;
6875 /* Give the symtab a useful name for debug purposes. */
6876 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
6877 name
= xstrprintf ("<type_units_%d>",
6878 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
6880 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
6882 pst
= create_partial_symtab (per_cu
, name
);
6888 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
6889 tu_group
->hash
.line_sect_off
= line_offset_struct
;
6894 /* Look up the type_unit_group for type unit CU, and create it if necessary.
6895 STMT_LIST is a DW_AT_stmt_list attribute. */
6897 static struct type_unit_group
*
6898 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
6900 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6901 struct type_unit_group
*tu_group
;
6903 unsigned int line_offset
;
6904 struct type_unit_group type_unit_group_for_lookup
;
6906 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
6908 dwarf2_per_objfile
->type_unit_groups
=
6909 allocate_type_unit_groups_table ();
6912 /* Do we need to create a new group, or can we use an existing one? */
6916 line_offset
= DW_UNSND (stmt_list
);
6917 ++tu_stats
->nr_symtab_sharers
;
6921 /* Ugh, no stmt_list. Rare, but we have to handle it.
6922 We can do various things here like create one group per TU or
6923 spread them over multiple groups to split up the expansion work.
6924 To avoid worst case scenarios (too many groups or too large groups)
6925 we, umm, group them in bunches. */
6926 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
6927 | (tu_stats
->nr_stmt_less_type_units
6928 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
6929 ++tu_stats
->nr_stmt_less_type_units
;
6932 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
6933 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
6934 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
6935 &type_unit_group_for_lookup
, INSERT
);
6938 tu_group
= (struct type_unit_group
*) *slot
;
6939 gdb_assert (tu_group
!= NULL
);
6943 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
6944 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
6946 ++tu_stats
->nr_symtabs
;
6952 /* Partial symbol tables. */
6954 /* Create a psymtab named NAME and assign it to PER_CU.
6956 The caller must fill in the following details:
6957 dirname, textlow, texthigh. */
6959 static struct partial_symtab
*
6960 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
6962 struct objfile
*objfile
= per_cu
->objfile
;
6963 struct partial_symtab
*pst
;
6965 pst
= start_psymtab_common (objfile
, name
, 0,
6966 objfile
->global_psymbols
,
6967 objfile
->static_psymbols
);
6969 pst
->psymtabs_addrmap_supported
= 1;
6971 /* This is the glue that links PST into GDB's symbol API. */
6972 pst
->read_symtab_private
= per_cu
;
6973 pst
->read_symtab
= dwarf2_read_symtab
;
6974 per_cu
->v
.psymtab
= pst
;
6979 /* The DATA object passed to process_psymtab_comp_unit_reader has this
6982 struct process_psymtab_comp_unit_data
6984 /* True if we are reading a DW_TAG_partial_unit. */
6986 int want_partial_unit
;
6988 /* The "pretend" language that is used if the CU doesn't declare a
6991 enum language pretend_language
;
6994 /* die_reader_func for process_psymtab_comp_unit. */
6997 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
6998 const gdb_byte
*info_ptr
,
6999 struct die_info
*comp_unit_die
,
7003 struct dwarf2_cu
*cu
= reader
->cu
;
7004 struct objfile
*objfile
= cu
->objfile
;
7005 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7006 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7008 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7009 struct partial_symtab
*pst
;
7010 enum pc_bounds_kind cu_bounds_kind
;
7011 const char *filename
;
7012 struct process_psymtab_comp_unit_data
*info
7013 = (struct process_psymtab_comp_unit_data
*) data
;
7015 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
7018 gdb_assert (! per_cu
->is_debug_types
);
7020 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
7022 cu
->list_in_scope
= &file_symbols
;
7024 /* Allocate a new partial symbol table structure. */
7025 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7026 if (filename
== NULL
)
7029 pst
= create_partial_symtab (per_cu
, filename
);
7031 /* This must be done before calling dwarf2_build_include_psymtabs. */
7032 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7034 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7036 dwarf2_find_base_address (comp_unit_die
, cu
);
7038 /* Possibly set the default values of LOWPC and HIGHPC from
7040 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7041 &best_highpc
, cu
, pst
);
7042 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7043 /* Store the contiguous range if it is not empty; it can be empty for
7044 CUs with no code. */
7045 addrmap_set_empty (objfile
->psymtabs_addrmap
,
7046 gdbarch_adjust_dwarf2_addr (gdbarch
,
7047 best_lowpc
+ baseaddr
),
7048 gdbarch_adjust_dwarf2_addr (gdbarch
,
7049 best_highpc
+ baseaddr
) - 1,
7052 /* Check if comp unit has_children.
7053 If so, read the rest of the partial symbols from this comp unit.
7054 If not, there's no more debug_info for this comp unit. */
7057 struct partial_die_info
*first_die
;
7058 CORE_ADDR lowpc
, highpc
;
7060 lowpc
= ((CORE_ADDR
) -1);
7061 highpc
= ((CORE_ADDR
) 0);
7063 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7065 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7066 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7068 /* If we didn't find a lowpc, set it to highpc to avoid
7069 complaints from `maint check'. */
7070 if (lowpc
== ((CORE_ADDR
) -1))
7073 /* If the compilation unit didn't have an explicit address range,
7074 then use the information extracted from its child dies. */
7075 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7078 best_highpc
= highpc
;
7081 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
7082 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
7084 end_psymtab_common (objfile
, pst
);
7086 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
7089 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
7090 struct dwarf2_per_cu_data
*iter
;
7092 /* Fill in 'dependencies' here; we fill in 'users' in a
7094 pst
->number_of_dependencies
= len
;
7096 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
7098 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
7101 pst
->dependencies
[i
] = iter
->v
.psymtab
;
7103 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
7106 /* Get the list of files included in the current compilation unit,
7107 and build a psymtab for each of them. */
7108 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7110 if (dwarf_read_debug
)
7112 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7114 fprintf_unfiltered (gdb_stdlog
,
7115 "Psymtab for %s unit @0x%x: %s - %s"
7116 ", %d global, %d static syms\n",
7117 per_cu
->is_debug_types
? "type" : "comp",
7118 to_underlying (per_cu
->sect_off
),
7119 paddress (gdbarch
, pst
->textlow
),
7120 paddress (gdbarch
, pst
->texthigh
),
7121 pst
->n_global_syms
, pst
->n_static_syms
);
7125 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7126 Process compilation unit THIS_CU for a psymtab. */
7129 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7130 int want_partial_unit
,
7131 enum language pretend_language
)
7133 /* If this compilation unit was already read in, free the
7134 cached copy in order to read it in again. This is
7135 necessary because we skipped some symbols when we first
7136 read in the compilation unit (see load_partial_dies).
7137 This problem could be avoided, but the benefit is unclear. */
7138 if (this_cu
->cu
!= NULL
)
7139 free_one_cached_comp_unit (this_cu
);
7141 if (this_cu
->is_debug_types
)
7142 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, build_type_psymtabs_reader
,
7146 process_psymtab_comp_unit_data info
;
7147 info
.want_partial_unit
= want_partial_unit
;
7148 info
.pretend_language
= pretend_language
;
7149 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
7150 process_psymtab_comp_unit_reader
, &info
);
7153 /* Age out any secondary CUs. */
7154 age_cached_comp_units ();
7157 /* Reader function for build_type_psymtabs. */
7160 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7161 const gdb_byte
*info_ptr
,
7162 struct die_info
*type_unit_die
,
7166 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7167 struct dwarf2_cu
*cu
= reader
->cu
;
7168 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7169 struct signatured_type
*sig_type
;
7170 struct type_unit_group
*tu_group
;
7171 struct attribute
*attr
;
7172 struct partial_die_info
*first_die
;
7173 CORE_ADDR lowpc
, highpc
;
7174 struct partial_symtab
*pst
;
7176 gdb_assert (data
== NULL
);
7177 gdb_assert (per_cu
->is_debug_types
);
7178 sig_type
= (struct signatured_type
*) per_cu
;
7183 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
7184 tu_group
= get_type_unit_group (cu
, attr
);
7186 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
7188 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7189 cu
->list_in_scope
= &file_symbols
;
7190 pst
= create_partial_symtab (per_cu
, "");
7193 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7195 lowpc
= (CORE_ADDR
) -1;
7196 highpc
= (CORE_ADDR
) 0;
7197 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7199 end_psymtab_common (objfile
, pst
);
7202 /* Struct used to sort TUs by their abbreviation table offset. */
7204 struct tu_abbrev_offset
7206 struct signatured_type
*sig_type
;
7207 sect_offset abbrev_offset
;
7210 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
7213 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
7215 const struct tu_abbrev_offset
* const *a
7216 = (const struct tu_abbrev_offset
* const*) ap
;
7217 const struct tu_abbrev_offset
* const *b
7218 = (const struct tu_abbrev_offset
* const*) bp
;
7219 sect_offset aoff
= (*a
)->abbrev_offset
;
7220 sect_offset boff
= (*b
)->abbrev_offset
;
7222 return (aoff
> boff
) - (aoff
< boff
);
7225 /* Efficiently read all the type units.
7226 This does the bulk of the work for build_type_psymtabs.
7228 The efficiency is because we sort TUs by the abbrev table they use and
7229 only read each abbrev table once. In one program there are 200K TUs
7230 sharing 8K abbrev tables.
7232 The main purpose of this function is to support building the
7233 dwarf2_per_objfile->type_unit_groups table.
7234 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7235 can collapse the search space by grouping them by stmt_list.
7236 The savings can be significant, in the same program from above the 200K TUs
7237 share 8K stmt_list tables.
7239 FUNC is expected to call get_type_unit_group, which will create the
7240 struct type_unit_group if necessary and add it to
7241 dwarf2_per_objfile->type_unit_groups. */
7244 build_type_psymtabs_1 (void)
7246 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7247 struct cleanup
*cleanups
;
7248 struct abbrev_table
*abbrev_table
;
7249 sect_offset abbrev_offset
;
7250 struct tu_abbrev_offset
*sorted_by_abbrev
;
7253 /* It's up to the caller to not call us multiple times. */
7254 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
7256 if (dwarf2_per_objfile
->n_type_units
== 0)
7259 /* TUs typically share abbrev tables, and there can be way more TUs than
7260 abbrev tables. Sort by abbrev table to reduce the number of times we
7261 read each abbrev table in.
7262 Alternatives are to punt or to maintain a cache of abbrev tables.
7263 This is simpler and efficient enough for now.
7265 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7266 symtab to use). Typically TUs with the same abbrev offset have the same
7267 stmt_list value too so in practice this should work well.
7269 The basic algorithm here is:
7271 sort TUs by abbrev table
7272 for each TU with same abbrev table:
7273 read abbrev table if first user
7274 read TU top level DIE
7275 [IWBN if DWO skeletons had DW_AT_stmt_list]
7278 if (dwarf_read_debug
)
7279 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7281 /* Sort in a separate table to maintain the order of all_type_units
7282 for .gdb_index: TU indices directly index all_type_units. */
7283 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
7284 dwarf2_per_objfile
->n_type_units
);
7285 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
7287 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
7289 sorted_by_abbrev
[i
].sig_type
= sig_type
;
7290 sorted_by_abbrev
[i
].abbrev_offset
=
7291 read_abbrev_offset (sig_type
->per_cu
.section
,
7292 sig_type
->per_cu
.sect_off
);
7294 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
7295 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
7296 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
7298 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7299 abbrev_table
= NULL
;
7300 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
7302 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
7304 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
7306 /* Switch to the next abbrev table if necessary. */
7307 if (abbrev_table
== NULL
7308 || tu
->abbrev_offset
!= abbrev_offset
)
7310 if (abbrev_table
!= NULL
)
7312 abbrev_table_free (abbrev_table
);
7313 /* Reset to NULL in case abbrev_table_read_table throws
7314 an error: abbrev_table_free_cleanup will get called. */
7315 abbrev_table
= NULL
;
7317 abbrev_offset
= tu
->abbrev_offset
;
7319 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
7321 ++tu_stats
->nr_uniq_abbrev_tables
;
7324 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
7325 build_type_psymtabs_reader
, NULL
);
7328 do_cleanups (cleanups
);
7331 /* Print collected type unit statistics. */
7334 print_tu_stats (void)
7336 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7338 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7339 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
7340 dwarf2_per_objfile
->n_type_units
);
7341 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7342 tu_stats
->nr_uniq_abbrev_tables
);
7343 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7344 tu_stats
->nr_symtabs
);
7345 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7346 tu_stats
->nr_symtab_sharers
);
7347 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7348 tu_stats
->nr_stmt_less_type_units
);
7349 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7350 tu_stats
->nr_all_type_units_reallocs
);
7353 /* Traversal function for build_type_psymtabs. */
7356 build_type_psymtab_dependencies (void **slot
, void *info
)
7358 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7359 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7360 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7361 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7362 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
7363 struct signatured_type
*iter
;
7366 gdb_assert (len
> 0);
7367 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
7369 pst
->number_of_dependencies
= len
;
7371 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
7373 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
7376 gdb_assert (iter
->per_cu
.is_debug_types
);
7377 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7378 iter
->type_unit_group
= tu_group
;
7381 VEC_free (sig_type_ptr
, tu_group
->tus
);
7386 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7387 Build partial symbol tables for the .debug_types comp-units. */
7390 build_type_psymtabs (struct objfile
*objfile
)
7392 if (! create_all_type_units (objfile
))
7395 build_type_psymtabs_1 ();
7398 /* Traversal function for process_skeletonless_type_unit.
7399 Read a TU in a DWO file and build partial symbols for it. */
7402 process_skeletonless_type_unit (void **slot
, void *info
)
7404 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7405 struct objfile
*objfile
= (struct objfile
*) info
;
7406 struct signatured_type find_entry
, *entry
;
7408 /* If this TU doesn't exist in the global table, add it and read it in. */
7410 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7412 dwarf2_per_objfile
->signatured_types
7413 = allocate_signatured_type_table (objfile
);
7416 find_entry
.signature
= dwo_unit
->signature
;
7417 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
7419 /* If we've already seen this type there's nothing to do. What's happening
7420 is we're doing our own version of comdat-folding here. */
7424 /* This does the job that create_all_type_units would have done for
7426 entry
= add_type_unit (dwo_unit
->signature
, slot
);
7427 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
7430 /* This does the job that build_type_psymtabs_1 would have done. */
7431 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
7432 build_type_psymtabs_reader
, NULL
);
7437 /* Traversal function for process_skeletonless_type_units. */
7440 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7442 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7444 if (dwo_file
->tus
!= NULL
)
7446 htab_traverse_noresize (dwo_file
->tus
,
7447 process_skeletonless_type_unit
, info
);
7453 /* Scan all TUs of DWO files, verifying we've processed them.
7454 This is needed in case a TU was emitted without its skeleton.
7455 Note: This can't be done until we know what all the DWO files are. */
7458 process_skeletonless_type_units (struct objfile
*objfile
)
7460 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7461 if (get_dwp_file () == NULL
7462 && dwarf2_per_objfile
->dwo_files
!= NULL
)
7464 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
7465 process_dwo_file_for_skeletonless_type_units
,
7470 /* Compute the 'user' field for each psymtab in OBJFILE. */
7473 set_partial_user (struct objfile
*objfile
)
7477 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
7479 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
7480 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7486 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7488 /* Set the 'user' field only if it is not already set. */
7489 if (pst
->dependencies
[j
]->user
== NULL
)
7490 pst
->dependencies
[j
]->user
= pst
;
7495 /* Build the partial symbol table by doing a quick pass through the
7496 .debug_info and .debug_abbrev sections. */
7499 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
7501 struct cleanup
*back_to
;
7504 if (dwarf_read_debug
)
7506 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7507 objfile_name (objfile
));
7510 dwarf2_per_objfile
->reading_partial_symbols
= 1;
7512 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
7514 /* Any cached compilation units will be linked by the per-objfile
7515 read_in_chain. Make sure to free them when we're done. */
7516 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
7518 build_type_psymtabs (objfile
);
7520 create_all_comp_units (objfile
);
7522 /* Create a temporary address map on a temporary obstack. We later
7523 copy this to the final obstack. */
7524 auto_obstack temp_obstack
;
7526 scoped_restore save_psymtabs_addrmap
7527 = make_scoped_restore (&objfile
->psymtabs_addrmap
,
7528 addrmap_create_mutable (&temp_obstack
));
7530 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
7532 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
7534 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
7537 /* This has to wait until we read the CUs, we need the list of DWOs. */
7538 process_skeletonless_type_units (objfile
);
7540 /* Now that all TUs have been processed we can fill in the dependencies. */
7541 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
7543 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
7544 build_type_psymtab_dependencies
, NULL
);
7547 if (dwarf_read_debug
)
7550 set_partial_user (objfile
);
7552 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
7553 &objfile
->objfile_obstack
);
7554 /* At this point we want to keep the address map. */
7555 save_psymtabs_addrmap
.release ();
7557 do_cleanups (back_to
);
7559 if (dwarf_read_debug
)
7560 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7561 objfile_name (objfile
));
7564 /* die_reader_func for load_partial_comp_unit. */
7567 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
7568 const gdb_byte
*info_ptr
,
7569 struct die_info
*comp_unit_die
,
7573 struct dwarf2_cu
*cu
= reader
->cu
;
7575 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
7577 /* Check if comp unit has_children.
7578 If so, read the rest of the partial symbols from this comp unit.
7579 If not, there's no more debug_info for this comp unit. */
7581 load_partial_dies (reader
, info_ptr
, 0);
7584 /* Load the partial DIEs for a secondary CU into memory.
7585 This is also used when rereading a primary CU with load_all_dies. */
7588 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
7590 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7591 load_partial_comp_unit_reader
, NULL
);
7595 read_comp_units_from_section (struct objfile
*objfile
,
7596 struct dwarf2_section_info
*section
,
7597 struct dwarf2_section_info
*abbrev_section
,
7598 unsigned int is_dwz
,
7601 struct dwarf2_per_cu_data
***all_comp_units
)
7603 const gdb_byte
*info_ptr
;
7604 bfd
*abfd
= get_section_bfd_owner (section
);
7606 if (dwarf_read_debug
)
7607 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
7608 get_section_name (section
),
7609 get_section_file_name (section
));
7611 dwarf2_read_section (objfile
, section
);
7613 info_ptr
= section
->buffer
;
7615 while (info_ptr
< section
->buffer
+ section
->size
)
7617 struct dwarf2_per_cu_data
*this_cu
;
7619 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
7621 comp_unit_head cu_header
;
7622 read_and_check_comp_unit_head (&cu_header
, section
, abbrev_section
,
7623 info_ptr
, rcuh_kind::COMPILE
);
7625 /* Save the compilation unit for later lookup. */
7626 if (cu_header
.unit_type
!= DW_UT_type
)
7628 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
7629 struct dwarf2_per_cu_data
);
7630 memset (this_cu
, 0, sizeof (*this_cu
));
7634 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
7635 struct signatured_type
);
7636 memset (sig_type
, 0, sizeof (*sig_type
));
7637 sig_type
->signature
= cu_header
.signature
;
7638 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
7639 this_cu
= &sig_type
->per_cu
;
7641 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
7642 this_cu
->sect_off
= sect_off
;
7643 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
7644 this_cu
->is_dwz
= is_dwz
;
7645 this_cu
->objfile
= objfile
;
7646 this_cu
->section
= section
;
7648 if (*n_comp_units
== *n_allocated
)
7651 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
7652 *all_comp_units
, *n_allocated
);
7654 (*all_comp_units
)[*n_comp_units
] = this_cu
;
7657 info_ptr
= info_ptr
+ this_cu
->length
;
7661 /* Create a list of all compilation units in OBJFILE.
7662 This is only done for -readnow and building partial symtabs. */
7665 create_all_comp_units (struct objfile
*objfile
)
7669 struct dwarf2_per_cu_data
**all_comp_units
;
7670 struct dwz_file
*dwz
;
7674 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
7676 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
,
7677 &dwarf2_per_objfile
->abbrev
, 0,
7678 &n_allocated
, &n_comp_units
, &all_comp_units
);
7680 dwz
= dwarf2_get_dwz_file ();
7682 read_comp_units_from_section (objfile
, &dwz
->info
, &dwz
->abbrev
, 1,
7683 &n_allocated
, &n_comp_units
,
7686 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
7687 struct dwarf2_per_cu_data
*,
7689 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
7690 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
7691 xfree (all_comp_units
);
7692 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
7695 /* Process all loaded DIEs for compilation unit CU, starting at
7696 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
7697 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
7698 DW_AT_ranges). See the comments of add_partial_subprogram on how
7699 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
7702 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
7703 CORE_ADDR
*highpc
, int set_addrmap
,
7704 struct dwarf2_cu
*cu
)
7706 struct partial_die_info
*pdi
;
7708 /* Now, march along the PDI's, descending into ones which have
7709 interesting children but skipping the children of the other ones,
7710 until we reach the end of the compilation unit. */
7716 fixup_partial_die (pdi
, cu
);
7718 /* Anonymous namespaces or modules have no name but have interesting
7719 children, so we need to look at them. Ditto for anonymous
7722 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
7723 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
7724 || pdi
->tag
== DW_TAG_imported_unit
)
7728 case DW_TAG_subprogram
:
7729 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7731 case DW_TAG_constant
:
7732 case DW_TAG_variable
:
7733 case DW_TAG_typedef
:
7734 case DW_TAG_union_type
:
7735 if (!pdi
->is_declaration
)
7737 add_partial_symbol (pdi
, cu
);
7740 case DW_TAG_class_type
:
7741 case DW_TAG_interface_type
:
7742 case DW_TAG_structure_type
:
7743 if (!pdi
->is_declaration
)
7745 add_partial_symbol (pdi
, cu
);
7747 if (cu
->language
== language_rust
&& pdi
->has_children
)
7748 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
7751 case DW_TAG_enumeration_type
:
7752 if (!pdi
->is_declaration
)
7753 add_partial_enumeration (pdi
, cu
);
7755 case DW_TAG_base_type
:
7756 case DW_TAG_subrange_type
:
7757 /* File scope base type definitions are added to the partial
7759 add_partial_symbol (pdi
, cu
);
7761 case DW_TAG_namespace
:
7762 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7765 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7767 case DW_TAG_imported_unit
:
7769 struct dwarf2_per_cu_data
*per_cu
;
7771 /* For now we don't handle imported units in type units. */
7772 if (cu
->per_cu
->is_debug_types
)
7774 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7775 " supported in type units [in module %s]"),
7776 objfile_name (cu
->objfile
));
7779 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.sect_off
,
7783 /* Go read the partial unit, if needed. */
7784 if (per_cu
->v
.psymtab
== NULL
)
7785 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
7787 VEC_safe_push (dwarf2_per_cu_ptr
,
7788 cu
->per_cu
->imported_symtabs
, per_cu
);
7791 case DW_TAG_imported_declaration
:
7792 add_partial_symbol (pdi
, cu
);
7799 /* If the die has a sibling, skip to the sibling. */
7801 pdi
= pdi
->die_sibling
;
7805 /* Functions used to compute the fully scoped name of a partial DIE.
7807 Normally, this is simple. For C++, the parent DIE's fully scoped
7808 name is concatenated with "::" and the partial DIE's name.
7809 Enumerators are an exception; they use the scope of their parent
7810 enumeration type, i.e. the name of the enumeration type is not
7811 prepended to the enumerator.
7813 There are two complexities. One is DW_AT_specification; in this
7814 case "parent" means the parent of the target of the specification,
7815 instead of the direct parent of the DIE. The other is compilers
7816 which do not emit DW_TAG_namespace; in this case we try to guess
7817 the fully qualified name of structure types from their members'
7818 linkage names. This must be done using the DIE's children rather
7819 than the children of any DW_AT_specification target. We only need
7820 to do this for structures at the top level, i.e. if the target of
7821 any DW_AT_specification (if any; otherwise the DIE itself) does not
7824 /* Compute the scope prefix associated with PDI's parent, in
7825 compilation unit CU. The result will be allocated on CU's
7826 comp_unit_obstack, or a copy of the already allocated PDI->NAME
7827 field. NULL is returned if no prefix is necessary. */
7829 partial_die_parent_scope (struct partial_die_info
*pdi
,
7830 struct dwarf2_cu
*cu
)
7832 const char *grandparent_scope
;
7833 struct partial_die_info
*parent
, *real_pdi
;
7835 /* We need to look at our parent DIE; if we have a DW_AT_specification,
7836 then this means the parent of the specification DIE. */
7839 while (real_pdi
->has_specification
)
7840 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
7841 real_pdi
->spec_is_dwz
, cu
);
7843 parent
= real_pdi
->die_parent
;
7847 if (parent
->scope_set
)
7848 return parent
->scope
;
7850 fixup_partial_die (parent
, cu
);
7852 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
7854 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
7855 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
7856 Work around this problem here. */
7857 if (cu
->language
== language_cplus
7858 && parent
->tag
== DW_TAG_namespace
7859 && strcmp (parent
->name
, "::") == 0
7860 && grandparent_scope
== NULL
)
7862 parent
->scope
= NULL
;
7863 parent
->scope_set
= 1;
7867 if (pdi
->tag
== DW_TAG_enumerator
)
7868 /* Enumerators should not get the name of the enumeration as a prefix. */
7869 parent
->scope
= grandparent_scope
;
7870 else if (parent
->tag
== DW_TAG_namespace
7871 || parent
->tag
== DW_TAG_module
7872 || parent
->tag
== DW_TAG_structure_type
7873 || parent
->tag
== DW_TAG_class_type
7874 || parent
->tag
== DW_TAG_interface_type
7875 || parent
->tag
== DW_TAG_union_type
7876 || parent
->tag
== DW_TAG_enumeration_type
)
7878 if (grandparent_scope
== NULL
)
7879 parent
->scope
= parent
->name
;
7881 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
7883 parent
->name
, 0, cu
);
7887 /* FIXME drow/2004-04-01: What should we be doing with
7888 function-local names? For partial symbols, we should probably be
7890 complaint (&symfile_complaints
,
7891 _("unhandled containing DIE tag %d for DIE at %d"),
7892 parent
->tag
, to_underlying (pdi
->sect_off
));
7893 parent
->scope
= grandparent_scope
;
7896 parent
->scope_set
= 1;
7897 return parent
->scope
;
7900 /* Return the fully scoped name associated with PDI, from compilation unit
7901 CU. The result will be allocated with malloc. */
7904 partial_die_full_name (struct partial_die_info
*pdi
,
7905 struct dwarf2_cu
*cu
)
7907 const char *parent_scope
;
7909 /* If this is a template instantiation, we can not work out the
7910 template arguments from partial DIEs. So, unfortunately, we have
7911 to go through the full DIEs. At least any work we do building
7912 types here will be reused if full symbols are loaded later. */
7913 if (pdi
->has_template_arguments
)
7915 fixup_partial_die (pdi
, cu
);
7917 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
7919 struct die_info
*die
;
7920 struct attribute attr
;
7921 struct dwarf2_cu
*ref_cu
= cu
;
7923 /* DW_FORM_ref_addr is using section offset. */
7924 attr
.name
= (enum dwarf_attribute
) 0;
7925 attr
.form
= DW_FORM_ref_addr
;
7926 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
7927 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
7929 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
7933 parent_scope
= partial_die_parent_scope (pdi
, cu
);
7934 if (parent_scope
== NULL
)
7937 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
7941 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
7943 struct objfile
*objfile
= cu
->objfile
;
7944 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7946 const char *actual_name
= NULL
;
7948 char *built_actual_name
;
7950 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7952 built_actual_name
= partial_die_full_name (pdi
, cu
);
7953 if (built_actual_name
!= NULL
)
7954 actual_name
= built_actual_name
;
7956 if (actual_name
== NULL
)
7957 actual_name
= pdi
->name
;
7961 case DW_TAG_subprogram
:
7962 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
7963 if (pdi
->is_external
|| cu
->language
== language_ada
)
7965 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
7966 of the global scope. But in Ada, we want to be able to access
7967 nested procedures globally. So all Ada subprograms are stored
7968 in the global scope. */
7969 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7970 built_actual_name
!= NULL
,
7971 VAR_DOMAIN
, LOC_BLOCK
,
7972 &objfile
->global_psymbols
,
7973 addr
, cu
->language
, objfile
);
7977 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7978 built_actual_name
!= NULL
,
7979 VAR_DOMAIN
, LOC_BLOCK
,
7980 &objfile
->static_psymbols
,
7981 addr
, cu
->language
, objfile
);
7984 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
7985 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
7987 case DW_TAG_constant
:
7989 std::vector
<partial_symbol
*> *list
;
7991 if (pdi
->is_external
)
7992 list
= &objfile
->global_psymbols
;
7994 list
= &objfile
->static_psymbols
;
7995 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7996 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
7997 list
, 0, cu
->language
, objfile
);
8000 case DW_TAG_variable
:
8002 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8006 && !dwarf2_per_objfile
->has_section_at_zero
)
8008 /* A global or static variable may also have been stripped
8009 out by the linker if unused, in which case its address
8010 will be nullified; do not add such variables into partial
8011 symbol table then. */
8013 else if (pdi
->is_external
)
8016 Don't enter into the minimal symbol tables as there is
8017 a minimal symbol table entry from the ELF symbols already.
8018 Enter into partial symbol table if it has a location
8019 descriptor or a type.
8020 If the location descriptor is missing, new_symbol will create
8021 a LOC_UNRESOLVED symbol, the address of the variable will then
8022 be determined from the minimal symbol table whenever the variable
8024 The address for the partial symbol table entry is not
8025 used by GDB, but it comes in handy for debugging partial symbol
8028 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8029 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8030 built_actual_name
!= NULL
,
8031 VAR_DOMAIN
, LOC_STATIC
,
8032 &objfile
->global_psymbols
,
8034 cu
->language
, objfile
);
8038 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8040 /* Static Variable. Skip symbols whose value we cannot know (those
8041 without location descriptors or constant values). */
8042 if (!has_loc
&& !pdi
->has_const_value
)
8044 xfree (built_actual_name
);
8048 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8049 built_actual_name
!= NULL
,
8050 VAR_DOMAIN
, LOC_STATIC
,
8051 &objfile
->static_psymbols
,
8052 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
8053 cu
->language
, objfile
);
8056 case DW_TAG_typedef
:
8057 case DW_TAG_base_type
:
8058 case DW_TAG_subrange_type
:
8059 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8060 built_actual_name
!= NULL
,
8061 VAR_DOMAIN
, LOC_TYPEDEF
,
8062 &objfile
->static_psymbols
,
8063 0, cu
->language
, objfile
);
8065 case DW_TAG_imported_declaration
:
8066 case DW_TAG_namespace
:
8067 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8068 built_actual_name
!= NULL
,
8069 VAR_DOMAIN
, LOC_TYPEDEF
,
8070 &objfile
->global_psymbols
,
8071 0, cu
->language
, objfile
);
8074 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8075 built_actual_name
!= NULL
,
8076 MODULE_DOMAIN
, LOC_TYPEDEF
,
8077 &objfile
->global_psymbols
,
8078 0, cu
->language
, objfile
);
8080 case DW_TAG_class_type
:
8081 case DW_TAG_interface_type
:
8082 case DW_TAG_structure_type
:
8083 case DW_TAG_union_type
:
8084 case DW_TAG_enumeration_type
:
8085 /* Skip external references. The DWARF standard says in the section
8086 about "Structure, Union, and Class Type Entries": "An incomplete
8087 structure, union or class type is represented by a structure,
8088 union or class entry that does not have a byte size attribute
8089 and that has a DW_AT_declaration attribute." */
8090 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8092 xfree (built_actual_name
);
8096 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8097 static vs. global. */
8098 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8099 built_actual_name
!= NULL
,
8100 STRUCT_DOMAIN
, LOC_TYPEDEF
,
8101 cu
->language
== language_cplus
8102 ? &objfile
->global_psymbols
8103 : &objfile
->static_psymbols
,
8104 0, cu
->language
, objfile
);
8107 case DW_TAG_enumerator
:
8108 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8109 built_actual_name
!= NULL
,
8110 VAR_DOMAIN
, LOC_CONST
,
8111 cu
->language
== language_cplus
8112 ? &objfile
->global_psymbols
8113 : &objfile
->static_psymbols
,
8114 0, cu
->language
, objfile
);
8120 xfree (built_actual_name
);
8123 /* Read a partial die corresponding to a namespace; also, add a symbol
8124 corresponding to that namespace to the symbol table. NAMESPACE is
8125 the name of the enclosing namespace. */
8128 add_partial_namespace (struct partial_die_info
*pdi
,
8129 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8130 int set_addrmap
, struct dwarf2_cu
*cu
)
8132 /* Add a symbol for the namespace. */
8134 add_partial_symbol (pdi
, cu
);
8136 /* Now scan partial symbols in that namespace. */
8138 if (pdi
->has_children
)
8139 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8142 /* Read a partial die corresponding to a Fortran module. */
8145 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8146 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8148 /* Add a symbol for the namespace. */
8150 add_partial_symbol (pdi
, cu
);
8152 /* Now scan partial symbols in that module. */
8154 if (pdi
->has_children
)
8155 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8158 /* Read a partial die corresponding to a subprogram and create a partial
8159 symbol for that subprogram. When the CU language allows it, this
8160 routine also defines a partial symbol for each nested subprogram
8161 that this subprogram contains. If SET_ADDRMAP is true, record the
8162 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
8163 and highest PC values found in PDI.
8165 PDI may also be a lexical block, in which case we simply search
8166 recursively for subprograms defined inside that lexical block.
8167 Again, this is only performed when the CU language allows this
8168 type of definitions. */
8171 add_partial_subprogram (struct partial_die_info
*pdi
,
8172 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8173 int set_addrmap
, struct dwarf2_cu
*cu
)
8175 if (pdi
->tag
== DW_TAG_subprogram
)
8177 if (pdi
->has_pc_info
)
8179 if (pdi
->lowpc
< *lowpc
)
8180 *lowpc
= pdi
->lowpc
;
8181 if (pdi
->highpc
> *highpc
)
8182 *highpc
= pdi
->highpc
;
8185 struct objfile
*objfile
= cu
->objfile
;
8186 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8191 baseaddr
= ANOFFSET (objfile
->section_offsets
,
8192 SECT_OFF_TEXT (objfile
));
8193 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
8194 pdi
->lowpc
+ baseaddr
);
8195 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
8196 pdi
->highpc
+ baseaddr
);
8197 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
8198 cu
->per_cu
->v
.psymtab
);
8202 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8204 if (!pdi
->is_declaration
)
8205 /* Ignore subprogram DIEs that do not have a name, they are
8206 illegal. Do not emit a complaint at this point, we will
8207 do so when we convert this psymtab into a symtab. */
8209 add_partial_symbol (pdi
, cu
);
8213 if (! pdi
->has_children
)
8216 if (cu
->language
== language_ada
)
8218 pdi
= pdi
->die_child
;
8221 fixup_partial_die (pdi
, cu
);
8222 if (pdi
->tag
== DW_TAG_subprogram
8223 || pdi
->tag
== DW_TAG_lexical_block
)
8224 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8225 pdi
= pdi
->die_sibling
;
8230 /* Read a partial die corresponding to an enumeration type. */
8233 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8234 struct dwarf2_cu
*cu
)
8236 struct partial_die_info
*pdi
;
8238 if (enum_pdi
->name
!= NULL
)
8239 add_partial_symbol (enum_pdi
, cu
);
8241 pdi
= enum_pdi
->die_child
;
8244 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8245 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
8247 add_partial_symbol (pdi
, cu
);
8248 pdi
= pdi
->die_sibling
;
8252 /* Return the initial uleb128 in the die at INFO_PTR. */
8255 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8257 unsigned int bytes_read
;
8259 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8262 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
8263 Return the corresponding abbrev, or NULL if the number is zero (indicating
8264 an empty DIE). In either case *BYTES_READ will be set to the length of
8265 the initial number. */
8267 static struct abbrev_info
*
8268 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
8269 struct dwarf2_cu
*cu
)
8271 bfd
*abfd
= cu
->objfile
->obfd
;
8272 unsigned int abbrev_number
;
8273 struct abbrev_info
*abbrev
;
8275 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8277 if (abbrev_number
== 0)
8280 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
8283 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8284 " at offset 0x%x [in module %s]"),
8285 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8286 to_underlying (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8292 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8293 Returns a pointer to the end of a series of DIEs, terminated by an empty
8294 DIE. Any children of the skipped DIEs will also be skipped. */
8296 static const gdb_byte
*
8297 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8299 struct dwarf2_cu
*cu
= reader
->cu
;
8300 struct abbrev_info
*abbrev
;
8301 unsigned int bytes_read
;
8305 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
8307 return info_ptr
+ bytes_read
;
8309 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8313 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8314 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8315 abbrev corresponding to that skipped uleb128 should be passed in
8316 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8319 static const gdb_byte
*
8320 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8321 struct abbrev_info
*abbrev
)
8323 unsigned int bytes_read
;
8324 struct attribute attr
;
8325 bfd
*abfd
= reader
->abfd
;
8326 struct dwarf2_cu
*cu
= reader
->cu
;
8327 const gdb_byte
*buffer
= reader
->buffer
;
8328 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8329 unsigned int form
, i
;
8331 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8333 /* The only abbrev we care about is DW_AT_sibling. */
8334 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8336 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
8337 if (attr
.form
== DW_FORM_ref_addr
)
8338 complaint (&symfile_complaints
,
8339 _("ignoring absolute DW_AT_sibling"));
8342 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
8343 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8345 if (sibling_ptr
< info_ptr
)
8346 complaint (&symfile_complaints
,
8347 _("DW_AT_sibling points backwards"));
8348 else if (sibling_ptr
> reader
->buffer_end
)
8349 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
8355 /* If it isn't DW_AT_sibling, skip this attribute. */
8356 form
= abbrev
->attrs
[i
].form
;
8360 case DW_FORM_ref_addr
:
8361 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8362 and later it is offset sized. */
8363 if (cu
->header
.version
== 2)
8364 info_ptr
+= cu
->header
.addr_size
;
8366 info_ptr
+= cu
->header
.offset_size
;
8368 case DW_FORM_GNU_ref_alt
:
8369 info_ptr
+= cu
->header
.offset_size
;
8372 info_ptr
+= cu
->header
.addr_size
;
8379 case DW_FORM_flag_present
:
8380 case DW_FORM_implicit_const
:
8392 case DW_FORM_ref_sig8
:
8395 case DW_FORM_data16
:
8398 case DW_FORM_string
:
8399 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8400 info_ptr
+= bytes_read
;
8402 case DW_FORM_sec_offset
:
8404 case DW_FORM_GNU_strp_alt
:
8405 info_ptr
+= cu
->header
.offset_size
;
8407 case DW_FORM_exprloc
:
8409 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8410 info_ptr
+= bytes_read
;
8412 case DW_FORM_block1
:
8413 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8415 case DW_FORM_block2
:
8416 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8418 case DW_FORM_block4
:
8419 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8423 case DW_FORM_ref_udata
:
8424 case DW_FORM_GNU_addr_index
:
8425 case DW_FORM_GNU_str_index
:
8426 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8428 case DW_FORM_indirect
:
8429 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8430 info_ptr
+= bytes_read
;
8431 /* We need to continue parsing from here, so just go back to
8433 goto skip_attribute
;
8436 error (_("Dwarf Error: Cannot handle %s "
8437 "in DWARF reader [in module %s]"),
8438 dwarf_form_name (form
),
8439 bfd_get_filename (abfd
));
8443 if (abbrev
->has_children
)
8444 return skip_children (reader
, info_ptr
);
8449 /* Locate ORIG_PDI's sibling.
8450 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8452 static const gdb_byte
*
8453 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8454 struct partial_die_info
*orig_pdi
,
8455 const gdb_byte
*info_ptr
)
8457 /* Do we know the sibling already? */
8459 if (orig_pdi
->sibling
)
8460 return orig_pdi
->sibling
;
8462 /* Are there any children to deal with? */
8464 if (!orig_pdi
->has_children
)
8467 /* Skip the children the long way. */
8469 return skip_children (reader
, info_ptr
);
8472 /* Expand this partial symbol table into a full symbol table. SELF is
8476 dwarf2_read_symtab (struct partial_symtab
*self
,
8477 struct objfile
*objfile
)
8481 warning (_("bug: psymtab for %s is already read in."),
8488 printf_filtered (_("Reading in symbols for %s..."),
8490 gdb_flush (gdb_stdout
);
8493 /* Restore our global data. */
8495 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
8496 dwarf2_objfile_data_key
);
8498 /* If this psymtab is constructed from a debug-only objfile, the
8499 has_section_at_zero flag will not necessarily be correct. We
8500 can get the correct value for this flag by looking at the data
8501 associated with the (presumably stripped) associated objfile. */
8502 if (objfile
->separate_debug_objfile_backlink
)
8504 struct dwarf2_per_objfile
*dpo_backlink
8505 = ((struct dwarf2_per_objfile
*)
8506 objfile_data (objfile
->separate_debug_objfile_backlink
,
8507 dwarf2_objfile_data_key
));
8509 dwarf2_per_objfile
->has_section_at_zero
8510 = dpo_backlink
->has_section_at_zero
;
8513 dwarf2_per_objfile
->reading_partial_symbols
= 0;
8515 psymtab_to_symtab_1 (self
);
8517 /* Finish up the debug error message. */
8519 printf_filtered (_("done.\n"));
8522 process_cu_includes ();
8525 /* Reading in full CUs. */
8527 /* Add PER_CU to the queue. */
8530 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8531 enum language pretend_language
)
8533 struct dwarf2_queue_item
*item
;
8536 item
= XNEW (struct dwarf2_queue_item
);
8537 item
->per_cu
= per_cu
;
8538 item
->pretend_language
= pretend_language
;
8541 if (dwarf2_queue
== NULL
)
8542 dwarf2_queue
= item
;
8544 dwarf2_queue_tail
->next
= item
;
8546 dwarf2_queue_tail
= item
;
8549 /* If PER_CU is not yet queued, add it to the queue.
8550 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
8552 The result is non-zero if PER_CU was queued, otherwise the result is zero
8553 meaning either PER_CU is already queued or it is already loaded.
8555 N.B. There is an invariant here that if a CU is queued then it is loaded.
8556 The caller is required to load PER_CU if we return non-zero. */
8559 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
8560 struct dwarf2_per_cu_data
*per_cu
,
8561 enum language pretend_language
)
8563 /* We may arrive here during partial symbol reading, if we need full
8564 DIEs to process an unusual case (e.g. template arguments). Do
8565 not queue PER_CU, just tell our caller to load its DIEs. */
8566 if (dwarf2_per_objfile
->reading_partial_symbols
)
8568 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
8573 /* Mark the dependence relation so that we don't flush PER_CU
8575 if (dependent_cu
!= NULL
)
8576 dwarf2_add_dependence (dependent_cu
, per_cu
);
8578 /* If it's already on the queue, we have nothing to do. */
8582 /* If the compilation unit is already loaded, just mark it as
8584 if (per_cu
->cu
!= NULL
)
8586 per_cu
->cu
->last_used
= 0;
8590 /* Add it to the queue. */
8591 queue_comp_unit (per_cu
, pretend_language
);
8596 /* Process the queue. */
8599 process_queue (void)
8601 struct dwarf2_queue_item
*item
, *next_item
;
8603 if (dwarf_read_debug
)
8605 fprintf_unfiltered (gdb_stdlog
,
8606 "Expanding one or more symtabs of objfile %s ...\n",
8607 objfile_name (dwarf2_per_objfile
->objfile
));
8610 /* The queue starts out with one item, but following a DIE reference
8611 may load a new CU, adding it to the end of the queue. */
8612 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
8614 if ((dwarf2_per_objfile
->using_index
8615 ? !item
->per_cu
->v
.quick
->compunit_symtab
8616 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
8617 /* Skip dummy CUs. */
8618 && item
->per_cu
->cu
!= NULL
)
8620 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
8621 unsigned int debug_print_threshold
;
8624 if (per_cu
->is_debug_types
)
8626 struct signatured_type
*sig_type
=
8627 (struct signatured_type
*) per_cu
;
8629 sprintf (buf
, "TU %s at offset 0x%x",
8630 hex_string (sig_type
->signature
),
8631 to_underlying (per_cu
->sect_off
));
8632 /* There can be 100s of TUs.
8633 Only print them in verbose mode. */
8634 debug_print_threshold
= 2;
8638 sprintf (buf
, "CU at offset 0x%x",
8639 to_underlying (per_cu
->sect_off
));
8640 debug_print_threshold
= 1;
8643 if (dwarf_read_debug
>= debug_print_threshold
)
8644 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
8646 if (per_cu
->is_debug_types
)
8647 process_full_type_unit (per_cu
, item
->pretend_language
);
8649 process_full_comp_unit (per_cu
, item
->pretend_language
);
8651 if (dwarf_read_debug
>= debug_print_threshold
)
8652 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
8655 item
->per_cu
->queued
= 0;
8656 next_item
= item
->next
;
8660 dwarf2_queue_tail
= NULL
;
8662 if (dwarf_read_debug
)
8664 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
8665 objfile_name (dwarf2_per_objfile
->objfile
));
8669 /* Free all allocated queue entries. This function only releases anything if
8670 an error was thrown; if the queue was processed then it would have been
8671 freed as we went along. */
8674 dwarf2_release_queue (void *dummy
)
8676 struct dwarf2_queue_item
*item
, *last
;
8678 item
= dwarf2_queue
;
8681 /* Anything still marked queued is likely to be in an
8682 inconsistent state, so discard it. */
8683 if (item
->per_cu
->queued
)
8685 if (item
->per_cu
->cu
!= NULL
)
8686 free_one_cached_comp_unit (item
->per_cu
);
8687 item
->per_cu
->queued
= 0;
8695 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
8698 /* Read in full symbols for PST, and anything it depends on. */
8701 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
8703 struct dwarf2_per_cu_data
*per_cu
;
8709 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
8710 if (!pst
->dependencies
[i
]->readin
8711 && pst
->dependencies
[i
]->user
== NULL
)
8713 /* Inform about additional files that need to be read in. */
8716 /* FIXME: i18n: Need to make this a single string. */
8717 fputs_filtered (" ", gdb_stdout
);
8719 fputs_filtered ("and ", gdb_stdout
);
8721 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
8722 wrap_here (""); /* Flush output. */
8723 gdb_flush (gdb_stdout
);
8725 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
8728 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
8732 /* It's an include file, no symbols to read for it.
8733 Everything is in the parent symtab. */
8738 dw2_do_instantiate_symtab (per_cu
);
8741 /* Trivial hash function for die_info: the hash value of a DIE
8742 is its offset in .debug_info for this objfile. */
8745 die_hash (const void *item
)
8747 const struct die_info
*die
= (const struct die_info
*) item
;
8749 return to_underlying (die
->sect_off
);
8752 /* Trivial comparison function for die_info structures: two DIEs
8753 are equal if they have the same offset. */
8756 die_eq (const void *item_lhs
, const void *item_rhs
)
8758 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
8759 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
8761 return die_lhs
->sect_off
== die_rhs
->sect_off
;
8764 /* die_reader_func for load_full_comp_unit.
8765 This is identical to read_signatured_type_reader,
8766 but is kept separate for now. */
8769 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
8770 const gdb_byte
*info_ptr
,
8771 struct die_info
*comp_unit_die
,
8775 struct dwarf2_cu
*cu
= reader
->cu
;
8776 enum language
*language_ptr
= (enum language
*) data
;
8778 gdb_assert (cu
->die_hash
== NULL
);
8780 htab_create_alloc_ex (cu
->header
.length
/ 12,
8784 &cu
->comp_unit_obstack
,
8785 hashtab_obstack_allocate
,
8786 dummy_obstack_deallocate
);
8789 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
8790 &info_ptr
, comp_unit_die
);
8791 cu
->dies
= comp_unit_die
;
8792 /* comp_unit_die is not stored in die_hash, no need. */
8794 /* We try not to read any attributes in this function, because not
8795 all CUs needed for references have been loaded yet, and symbol
8796 table processing isn't initialized. But we have to set the CU language,
8797 or we won't be able to build types correctly.
8798 Similarly, if we do not read the producer, we can not apply
8799 producer-specific interpretation. */
8800 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
8803 /* Load the DIEs associated with PER_CU into memory. */
8806 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8807 enum language pretend_language
)
8809 gdb_assert (! this_cu
->is_debug_types
);
8811 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
8812 load_full_comp_unit_reader
, &pretend_language
);
8815 /* Add a DIE to the delayed physname list. */
8818 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
8819 const char *name
, struct die_info
*die
,
8820 struct dwarf2_cu
*cu
)
8822 struct delayed_method_info mi
;
8824 mi
.fnfield_index
= fnfield_index
;
8828 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
8831 /* A cleanup for freeing the delayed method list. */
8834 free_delayed_list (void *ptr
)
8836 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
8837 if (cu
->method_list
!= NULL
)
8839 VEC_free (delayed_method_info
, cu
->method_list
);
8840 cu
->method_list
= NULL
;
8844 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
8845 "const" / "volatile". If so, decrements LEN by the length of the
8846 modifier and return true. Otherwise return false. */
8850 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
8852 size_t mod_len
= sizeof (mod
) - 1;
8853 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
8861 /* Compute the physnames of any methods on the CU's method list.
8863 The computation of method physnames is delayed in order to avoid the
8864 (bad) condition that one of the method's formal parameters is of an as yet
8868 compute_delayed_physnames (struct dwarf2_cu
*cu
)
8871 struct delayed_method_info
*mi
;
8873 /* Only C++ delays computing physnames. */
8874 if (VEC_empty (delayed_method_info
, cu
->method_list
))
8876 gdb_assert (cu
->language
== language_cplus
);
8878 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
8880 const char *physname
;
8881 struct fn_fieldlist
*fn_flp
8882 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
8883 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
8884 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
8885 = physname
? physname
: "";
8887 /* Since there's no tag to indicate whether a method is a
8888 const/volatile overload, extract that information out of the
8890 if (physname
!= NULL
)
8892 size_t len
= strlen (physname
);
8896 if (physname
[len
] == ')') /* shortcut */
8898 else if (check_modifier (physname
, len
, " const"))
8899 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
->index
) = 1;
8900 else if (check_modifier (physname
, len
, " volatile"))
8901 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
->index
) = 1;
8909 /* Go objects should be embedded in a DW_TAG_module DIE,
8910 and it's not clear if/how imported objects will appear.
8911 To keep Go support simple until that's worked out,
8912 go back through what we've read and create something usable.
8913 We could do this while processing each DIE, and feels kinda cleaner,
8914 but that way is more invasive.
8915 This is to, for example, allow the user to type "p var" or "b main"
8916 without having to specify the package name, and allow lookups
8917 of module.object to work in contexts that use the expression
8921 fixup_go_packaging (struct dwarf2_cu
*cu
)
8923 char *package_name
= NULL
;
8924 struct pending
*list
;
8927 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
8929 for (i
= 0; i
< list
->nsyms
; ++i
)
8931 struct symbol
*sym
= list
->symbol
[i
];
8933 if (SYMBOL_LANGUAGE (sym
) == language_go
8934 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
8936 char *this_package_name
= go_symbol_package_name (sym
);
8938 if (this_package_name
== NULL
)
8940 if (package_name
== NULL
)
8941 package_name
= this_package_name
;
8944 if (strcmp (package_name
, this_package_name
) != 0)
8945 complaint (&symfile_complaints
,
8946 _("Symtab %s has objects from two different Go packages: %s and %s"),
8947 (symbol_symtab (sym
) != NULL
8948 ? symtab_to_filename_for_display
8949 (symbol_symtab (sym
))
8950 : objfile_name (cu
->objfile
)),
8951 this_package_name
, package_name
);
8952 xfree (this_package_name
);
8958 if (package_name
!= NULL
)
8960 struct objfile
*objfile
= cu
->objfile
;
8961 const char *saved_package_name
8962 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8964 strlen (package_name
));
8965 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
8966 saved_package_name
);
8969 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
8971 sym
= allocate_symbol (objfile
);
8972 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
8973 SYMBOL_SET_NAMES (sym
, saved_package_name
,
8974 strlen (saved_package_name
), 0, objfile
);
8975 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
8976 e.g., "main" finds the "main" module and not C's main(). */
8977 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8978 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
8979 SYMBOL_TYPE (sym
) = type
;
8981 add_symbol_to_list (sym
, &global_symbols
);
8983 xfree (package_name
);
8987 /* Return the symtab for PER_CU. This works properly regardless of
8988 whether we're using the index or psymtabs. */
8990 static struct compunit_symtab
*
8991 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
8993 return (dwarf2_per_objfile
->using_index
8994 ? per_cu
->v
.quick
->compunit_symtab
8995 : per_cu
->v
.psymtab
->compunit_symtab
);
8998 /* A helper function for computing the list of all symbol tables
8999 included by PER_CU. */
9002 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
9003 htab_t all_children
, htab_t all_type_symtabs
,
9004 struct dwarf2_per_cu_data
*per_cu
,
9005 struct compunit_symtab
*immediate_parent
)
9009 struct compunit_symtab
*cust
;
9010 struct dwarf2_per_cu_data
*iter
;
9012 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9015 /* This inclusion and its children have been processed. */
9020 /* Only add a CU if it has a symbol table. */
9021 cust
= get_compunit_symtab (per_cu
);
9024 /* If this is a type unit only add its symbol table if we haven't
9025 seen it yet (type unit per_cu's can share symtabs). */
9026 if (per_cu
->is_debug_types
)
9028 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9032 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
9033 if (cust
->user
== NULL
)
9034 cust
->user
= immediate_parent
;
9039 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
9040 if (cust
->user
== NULL
)
9041 cust
->user
= immediate_parent
;
9046 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
9049 recursively_compute_inclusions (result
, all_children
,
9050 all_type_symtabs
, iter
, cust
);
9054 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9058 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
9060 gdb_assert (! per_cu
->is_debug_types
);
9062 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
9065 struct dwarf2_per_cu_data
*per_cu_iter
;
9066 struct compunit_symtab
*compunit_symtab_iter
;
9067 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
9068 htab_t all_children
, all_type_symtabs
;
9069 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
9071 /* If we don't have a symtab, we can just skip this case. */
9075 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9076 NULL
, xcalloc
, xfree
);
9077 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9078 NULL
, xcalloc
, xfree
);
9081 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
9085 recursively_compute_inclusions (&result_symtabs
, all_children
,
9086 all_type_symtabs
, per_cu_iter
,
9090 /* Now we have a transitive closure of all the included symtabs. */
9091 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
9093 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
9094 struct compunit_symtab
*, len
+ 1);
9096 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
9097 compunit_symtab_iter
);
9099 cust
->includes
[ix
] = compunit_symtab_iter
;
9100 cust
->includes
[len
] = NULL
;
9102 VEC_free (compunit_symtab_ptr
, result_symtabs
);
9103 htab_delete (all_children
);
9104 htab_delete (all_type_symtabs
);
9108 /* Compute the 'includes' field for the symtabs of all the CUs we just
9112 process_cu_includes (void)
9115 struct dwarf2_per_cu_data
*iter
;
9118 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
9122 if (! iter
->is_debug_types
)
9123 compute_compunit_symtab_includes (iter
);
9126 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
9129 /* Generate full symbol information for PER_CU, whose DIEs have
9130 already been loaded into memory. */
9133 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9134 enum language pretend_language
)
9136 struct dwarf2_cu
*cu
= per_cu
->cu
;
9137 struct objfile
*objfile
= per_cu
->objfile
;
9138 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9139 CORE_ADDR lowpc
, highpc
;
9140 struct compunit_symtab
*cust
;
9141 struct cleanup
*delayed_list_cleanup
;
9143 struct block
*static_block
;
9146 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9149 scoped_free_pendings free_pending
;
9150 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
9152 cu
->list_in_scope
= &file_symbols
;
9154 cu
->language
= pretend_language
;
9155 cu
->language_defn
= language_def (cu
->language
);
9157 /* Do line number decoding in read_file_scope () */
9158 process_die (cu
->dies
, cu
);
9160 /* For now fudge the Go package. */
9161 if (cu
->language
== language_go
)
9162 fixup_go_packaging (cu
);
9164 /* Now that we have processed all the DIEs in the CU, all the types
9165 should be complete, and it should now be safe to compute all of the
9167 compute_delayed_physnames (cu
);
9168 do_cleanups (delayed_list_cleanup
);
9170 /* Some compilers don't define a DW_AT_high_pc attribute for the
9171 compilation unit. If the DW_AT_high_pc is missing, synthesize
9172 it, by scanning the DIE's below the compilation unit. */
9173 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
9175 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
9176 static_block
= end_symtab_get_static_block (addr
, 0, 1);
9178 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
9179 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
9180 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
9181 addrmap to help ensure it has an accurate map of pc values belonging to
9183 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
9185 cust
= end_symtab_from_static_block (static_block
,
9186 SECT_OFF_TEXT (objfile
), 0);
9190 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
9192 /* Set symtab language to language from DW_AT_language. If the
9193 compilation is from a C file generated by language preprocessors, do
9194 not set the language if it was already deduced by start_subfile. */
9195 if (!(cu
->language
== language_c
9196 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
9197 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9199 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
9200 produce DW_AT_location with location lists but it can be possibly
9201 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
9202 there were bugs in prologue debug info, fixed later in GCC-4.5
9203 by "unwind info for epilogues" patch (which is not directly related).
9205 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
9206 needed, it would be wrong due to missing DW_AT_producer there.
9208 Still one can confuse GDB by using non-standard GCC compilation
9209 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
9211 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
9212 cust
->locations_valid
= 1;
9214 if (gcc_4_minor
>= 5)
9215 cust
->epilogue_unwind_valid
= 1;
9217 cust
->call_site_htab
= cu
->call_site_htab
;
9220 if (dwarf2_per_objfile
->using_index
)
9221 per_cu
->v
.quick
->compunit_symtab
= cust
;
9224 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
9225 pst
->compunit_symtab
= cust
;
9229 /* Push it for inclusion processing later. */
9230 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
9233 /* Generate full symbol information for type unit PER_CU, whose DIEs have
9234 already been loaded into memory. */
9237 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
9238 enum language pretend_language
)
9240 struct dwarf2_cu
*cu
= per_cu
->cu
;
9241 struct objfile
*objfile
= per_cu
->objfile
;
9242 struct compunit_symtab
*cust
;
9243 struct cleanup
*delayed_list_cleanup
;
9244 struct signatured_type
*sig_type
;
9246 gdb_assert (per_cu
->is_debug_types
);
9247 sig_type
= (struct signatured_type
*) per_cu
;
9250 scoped_free_pendings free_pending
;
9251 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
9253 cu
->list_in_scope
= &file_symbols
;
9255 cu
->language
= pretend_language
;
9256 cu
->language_defn
= language_def (cu
->language
);
9258 /* The symbol tables are set up in read_type_unit_scope. */
9259 process_die (cu
->dies
, cu
);
9261 /* For now fudge the Go package. */
9262 if (cu
->language
== language_go
)
9263 fixup_go_packaging (cu
);
9265 /* Now that we have processed all the DIEs in the CU, all the types
9266 should be complete, and it should now be safe to compute all of the
9268 compute_delayed_physnames (cu
);
9269 do_cleanups (delayed_list_cleanup
);
9271 /* TUs share symbol tables.
9272 If this is the first TU to use this symtab, complete the construction
9273 of it with end_expandable_symtab. Otherwise, complete the addition of
9274 this TU's symbols to the existing symtab. */
9275 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
9277 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
9278 sig_type
->type_unit_group
->compunit_symtab
= cust
;
9282 /* Set symtab language to language from DW_AT_language. If the
9283 compilation is from a C file generated by language preprocessors,
9284 do not set the language if it was already deduced by
9286 if (!(cu
->language
== language_c
9287 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
9288 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9293 augment_type_symtab ();
9294 cust
= sig_type
->type_unit_group
->compunit_symtab
;
9297 if (dwarf2_per_objfile
->using_index
)
9298 per_cu
->v
.quick
->compunit_symtab
= cust
;
9301 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
9302 pst
->compunit_symtab
= cust
;
9307 /* Process an imported unit DIE. */
9310 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9312 struct attribute
*attr
;
9314 /* For now we don't handle imported units in type units. */
9315 if (cu
->per_cu
->is_debug_types
)
9317 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9318 " supported in type units [in module %s]"),
9319 objfile_name (cu
->objfile
));
9322 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9325 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
9326 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
9327 dwarf2_per_cu_data
*per_cu
9328 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
, cu
->objfile
);
9330 /* If necessary, add it to the queue and load its DIEs. */
9331 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
9332 load_full_comp_unit (per_cu
, cu
->language
);
9334 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
9339 /* RAII object that represents a process_die scope: i.e.,
9340 starts/finishes processing a DIE. */
9341 class process_die_scope
9344 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
9345 : m_die (die
), m_cu (cu
)
9347 /* We should only be processing DIEs not already in process. */
9348 gdb_assert (!m_die
->in_process
);
9349 m_die
->in_process
= true;
9352 ~process_die_scope ()
9354 m_die
->in_process
= false;
9356 /* If we're done processing the DIE for the CU that owns the line
9357 header, we don't need the line header anymore. */
9358 if (m_cu
->line_header_die_owner
== m_die
)
9360 delete m_cu
->line_header
;
9361 m_cu
->line_header
= NULL
;
9362 m_cu
->line_header_die_owner
= NULL
;
9371 /* Process a die and its children. */
9374 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9376 process_die_scope
scope (die
, cu
);
9380 case DW_TAG_padding
:
9382 case DW_TAG_compile_unit
:
9383 case DW_TAG_partial_unit
:
9384 read_file_scope (die
, cu
);
9386 case DW_TAG_type_unit
:
9387 read_type_unit_scope (die
, cu
);
9389 case DW_TAG_subprogram
:
9390 case DW_TAG_inlined_subroutine
:
9391 read_func_scope (die
, cu
);
9393 case DW_TAG_lexical_block
:
9394 case DW_TAG_try_block
:
9395 case DW_TAG_catch_block
:
9396 read_lexical_block_scope (die
, cu
);
9398 case DW_TAG_call_site
:
9399 case DW_TAG_GNU_call_site
:
9400 read_call_site_scope (die
, cu
);
9402 case DW_TAG_class_type
:
9403 case DW_TAG_interface_type
:
9404 case DW_TAG_structure_type
:
9405 case DW_TAG_union_type
:
9406 process_structure_scope (die
, cu
);
9408 case DW_TAG_enumeration_type
:
9409 process_enumeration_scope (die
, cu
);
9412 /* These dies have a type, but processing them does not create
9413 a symbol or recurse to process the children. Therefore we can
9414 read them on-demand through read_type_die. */
9415 case DW_TAG_subroutine_type
:
9416 case DW_TAG_set_type
:
9417 case DW_TAG_array_type
:
9418 case DW_TAG_pointer_type
:
9419 case DW_TAG_ptr_to_member_type
:
9420 case DW_TAG_reference_type
:
9421 case DW_TAG_rvalue_reference_type
:
9422 case DW_TAG_string_type
:
9425 case DW_TAG_base_type
:
9426 case DW_TAG_subrange_type
:
9427 case DW_TAG_typedef
:
9428 /* Add a typedef symbol for the type definition, if it has a
9430 new_symbol (die
, read_type_die (die
, cu
), cu
);
9432 case DW_TAG_common_block
:
9433 read_common_block (die
, cu
);
9435 case DW_TAG_common_inclusion
:
9437 case DW_TAG_namespace
:
9438 cu
->processing_has_namespace_info
= 1;
9439 read_namespace (die
, cu
);
9442 cu
->processing_has_namespace_info
= 1;
9443 read_module (die
, cu
);
9445 case DW_TAG_imported_declaration
:
9446 cu
->processing_has_namespace_info
= 1;
9447 if (read_namespace_alias (die
, cu
))
9449 /* The declaration is not a global namespace alias: fall through. */
9450 case DW_TAG_imported_module
:
9451 cu
->processing_has_namespace_info
= 1;
9452 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
9453 || cu
->language
!= language_fortran
))
9454 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
9455 dwarf_tag_name (die
->tag
));
9456 read_import_statement (die
, cu
);
9459 case DW_TAG_imported_unit
:
9460 process_imported_unit_die (die
, cu
);
9463 case DW_TAG_variable
:
9464 read_variable (die
, cu
);
9468 new_symbol (die
, NULL
, cu
);
9473 /* DWARF name computation. */
9475 /* A helper function for dwarf2_compute_name which determines whether DIE
9476 needs to have the name of the scope prepended to the name listed in the
9480 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
9482 struct attribute
*attr
;
9486 case DW_TAG_namespace
:
9487 case DW_TAG_typedef
:
9488 case DW_TAG_class_type
:
9489 case DW_TAG_interface_type
:
9490 case DW_TAG_structure_type
:
9491 case DW_TAG_union_type
:
9492 case DW_TAG_enumeration_type
:
9493 case DW_TAG_enumerator
:
9494 case DW_TAG_subprogram
:
9495 case DW_TAG_inlined_subroutine
:
9497 case DW_TAG_imported_declaration
:
9500 case DW_TAG_variable
:
9501 case DW_TAG_constant
:
9502 /* We only need to prefix "globally" visible variables. These include
9503 any variable marked with DW_AT_external or any variable that
9504 lives in a namespace. [Variables in anonymous namespaces
9505 require prefixing, but they are not DW_AT_external.] */
9507 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
9509 struct dwarf2_cu
*spec_cu
= cu
;
9511 return die_needs_namespace (die_specification (die
, &spec_cu
),
9515 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9516 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
9517 && die
->parent
->tag
!= DW_TAG_module
)
9519 /* A variable in a lexical block of some kind does not need a
9520 namespace, even though in C++ such variables may be external
9521 and have a mangled name. */
9522 if (die
->parent
->tag
== DW_TAG_lexical_block
9523 || die
->parent
->tag
== DW_TAG_try_block
9524 || die
->parent
->tag
== DW_TAG_catch_block
9525 || die
->parent
->tag
== DW_TAG_subprogram
)
9534 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
9535 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
9536 defined for the given DIE. */
9538 static struct attribute
*
9539 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
9541 struct attribute
*attr
;
9543 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
9545 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
9550 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
9551 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
9552 defined for the given DIE. */
9555 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9557 const char *linkage_name
;
9559 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
9560 if (linkage_name
== NULL
)
9561 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
9563 return linkage_name
;
9566 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
9567 compute the physname for the object, which include a method's:
9568 - formal parameters (C++),
9569 - receiver type (Go),
9571 The term "physname" is a bit confusing.
9572 For C++, for example, it is the demangled name.
9573 For Go, for example, it's the mangled name.
9575 For Ada, return the DIE's linkage name rather than the fully qualified
9576 name. PHYSNAME is ignored..
9578 The result is allocated on the objfile_obstack and canonicalized. */
9581 dwarf2_compute_name (const char *name
,
9582 struct die_info
*die
, struct dwarf2_cu
*cu
,
9585 struct objfile
*objfile
= cu
->objfile
;
9588 name
= dwarf2_name (die
, cu
);
9590 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
9591 but otherwise compute it by typename_concat inside GDB.
9592 FIXME: Actually this is not really true, or at least not always true.
9593 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
9594 Fortran names because there is no mangling standard. So new_symbol_full
9595 will set the demangled name to the result of dwarf2_full_name, and it is
9596 the demangled name that GDB uses if it exists. */
9597 if (cu
->language
== language_ada
9598 || (cu
->language
== language_fortran
&& physname
))
9600 /* For Ada unit, we prefer the linkage name over the name, as
9601 the former contains the exported name, which the user expects
9602 to be able to reference. Ideally, we want the user to be able
9603 to reference this entity using either natural or linkage name,
9604 but we haven't started looking at this enhancement yet. */
9605 const char *linkage_name
= dw2_linkage_name (die
, cu
);
9607 if (linkage_name
!= NULL
)
9608 return linkage_name
;
9611 /* These are the only languages we know how to qualify names in. */
9613 && (cu
->language
== language_cplus
9614 || cu
->language
== language_fortran
|| cu
->language
== language_d
9615 || cu
->language
== language_rust
))
9617 if (die_needs_namespace (die
, cu
))
9621 const char *canonical_name
= NULL
;
9625 prefix
= determine_prefix (die
, cu
);
9626 if (*prefix
!= '\0')
9628 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
9631 buf
.puts (prefixed_name
);
9632 xfree (prefixed_name
);
9637 /* Template parameters may be specified in the DIE's DW_AT_name, or
9638 as children with DW_TAG_template_type_param or
9639 DW_TAG_value_type_param. If the latter, add them to the name
9640 here. If the name already has template parameters, then
9641 skip this step; some versions of GCC emit both, and
9642 it is more efficient to use the pre-computed name.
9644 Something to keep in mind about this process: it is very
9645 unlikely, or in some cases downright impossible, to produce
9646 something that will match the mangled name of a function.
9647 If the definition of the function has the same debug info,
9648 we should be able to match up with it anyway. But fallbacks
9649 using the minimal symbol, for instance to find a method
9650 implemented in a stripped copy of libstdc++, will not work.
9651 If we do not have debug info for the definition, we will have to
9652 match them up some other way.
9654 When we do name matching there is a related problem with function
9655 templates; two instantiated function templates are allowed to
9656 differ only by their return types, which we do not add here. */
9658 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
9660 struct attribute
*attr
;
9661 struct die_info
*child
;
9664 die
->building_fullname
= 1;
9666 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
9670 const gdb_byte
*bytes
;
9671 struct dwarf2_locexpr_baton
*baton
;
9674 if (child
->tag
!= DW_TAG_template_type_param
9675 && child
->tag
!= DW_TAG_template_value_param
)
9686 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
9689 complaint (&symfile_complaints
,
9690 _("template parameter missing DW_AT_type"));
9691 buf
.puts ("UNKNOWN_TYPE");
9694 type
= die_type (child
, cu
);
9696 if (child
->tag
== DW_TAG_template_type_param
)
9698 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
9702 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
9705 complaint (&symfile_complaints
,
9706 _("template parameter missing "
9707 "DW_AT_const_value"));
9708 buf
.puts ("UNKNOWN_VALUE");
9712 dwarf2_const_value_attr (attr
, type
, name
,
9713 &cu
->comp_unit_obstack
, cu
,
9714 &value
, &bytes
, &baton
);
9716 if (TYPE_NOSIGN (type
))
9717 /* GDB prints characters as NUMBER 'CHAR'. If that's
9718 changed, this can use value_print instead. */
9719 c_printchar (value
, type
, &buf
);
9722 struct value_print_options opts
;
9725 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
9729 else if (bytes
!= NULL
)
9731 v
= allocate_value (type
);
9732 memcpy (value_contents_writeable (v
), bytes
,
9733 TYPE_LENGTH (type
));
9736 v
= value_from_longest (type
, value
);
9738 /* Specify decimal so that we do not depend on
9740 get_formatted_print_options (&opts
, 'd');
9742 value_print (v
, &buf
, &opts
);
9748 die
->building_fullname
= 0;
9752 /* Close the argument list, with a space if necessary
9753 (nested templates). */
9754 if (!buf
.empty () && buf
.string ().back () == '>')
9761 /* For C++ methods, append formal parameter type
9762 information, if PHYSNAME. */
9764 if (physname
&& die
->tag
== DW_TAG_subprogram
9765 && cu
->language
== language_cplus
)
9767 struct type
*type
= read_type_die (die
, cu
);
9769 c_type_print_args (type
, &buf
, 1, cu
->language
,
9770 &type_print_raw_options
);
9772 if (cu
->language
== language_cplus
)
9774 /* Assume that an artificial first parameter is
9775 "this", but do not crash if it is not. RealView
9776 marks unnamed (and thus unused) parameters as
9777 artificial; there is no way to differentiate
9779 if (TYPE_NFIELDS (type
) > 0
9780 && TYPE_FIELD_ARTIFICIAL (type
, 0)
9781 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
9782 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
9784 buf
.puts (" const");
9788 const std::string
&intermediate_name
= buf
.string ();
9790 if (cu
->language
== language_cplus
)
9792 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
9793 &objfile
->per_bfd
->storage_obstack
);
9795 /* If we only computed INTERMEDIATE_NAME, or if
9796 INTERMEDIATE_NAME is already canonical, then we need to
9797 copy it to the appropriate obstack. */
9798 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
9799 name
= ((const char *)
9800 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9801 intermediate_name
.c_str (),
9802 intermediate_name
.length ()));
9804 name
= canonical_name
;
9811 /* Return the fully qualified name of DIE, based on its DW_AT_name.
9812 If scope qualifiers are appropriate they will be added. The result
9813 will be allocated on the storage_obstack, or NULL if the DIE does
9814 not have a name. NAME may either be from a previous call to
9815 dwarf2_name or NULL.
9817 The output string will be canonicalized (if C++). */
9820 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
9822 return dwarf2_compute_name (name
, die
, cu
, 0);
9825 /* Construct a physname for the given DIE in CU. NAME may either be
9826 from a previous call to dwarf2_name or NULL. The result will be
9827 allocated on the objfile_objstack or NULL if the DIE does not have a
9830 The output string will be canonicalized (if C++). */
9833 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
9835 struct objfile
*objfile
= cu
->objfile
;
9836 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
9839 /* In this case dwarf2_compute_name is just a shortcut not building anything
9841 if (!die_needs_namespace (die
, cu
))
9842 return dwarf2_compute_name (name
, die
, cu
, 1);
9844 mangled
= dw2_linkage_name (die
, cu
);
9846 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
9847 See https://github.com/rust-lang/rust/issues/32925. */
9848 if (cu
->language
== language_rust
&& mangled
!= NULL
9849 && strchr (mangled
, '{') != NULL
)
9852 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
9854 gdb::unique_xmalloc_ptr
<char> demangled
;
9855 if (mangled
!= NULL
)
9857 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
9858 type. It is easier for GDB users to search for such functions as
9859 `name(params)' than `long name(params)'. In such case the minimal
9860 symbol names do not match the full symbol names but for template
9861 functions there is never a need to look up their definition from their
9862 declaration so the only disadvantage remains the minimal symbol
9863 variant `long name(params)' does not have the proper inferior type.
9866 if (cu
->language
== language_go
)
9868 /* This is a lie, but we already lie to the caller new_symbol_full.
9869 new_symbol_full assumes we return the mangled name.
9870 This just undoes that lie until things are cleaned up. */
9874 demangled
.reset (gdb_demangle (mangled
,
9875 (DMGL_PARAMS
| DMGL_ANSI
9879 canon
= demangled
.get ();
9887 if (canon
== NULL
|| check_physname
)
9889 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
9891 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
9893 /* It may not mean a bug in GDB. The compiler could also
9894 compute DW_AT_linkage_name incorrectly. But in such case
9895 GDB would need to be bug-to-bug compatible. */
9897 complaint (&symfile_complaints
,
9898 _("Computed physname <%s> does not match demangled <%s> "
9899 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
9900 physname
, canon
, mangled
, to_underlying (die
->sect_off
),
9901 objfile_name (objfile
));
9903 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
9904 is available here - over computed PHYSNAME. It is safer
9905 against both buggy GDB and buggy compilers. */
9919 retval
= ((const char *)
9920 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9921 retval
, strlen (retval
)));
9926 /* Inspect DIE in CU for a namespace alias. If one exists, record
9927 a new symbol for it.
9929 Returns 1 if a namespace alias was recorded, 0 otherwise. */
9932 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
9934 struct attribute
*attr
;
9936 /* If the die does not have a name, this is not a namespace
9938 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9942 struct die_info
*d
= die
;
9943 struct dwarf2_cu
*imported_cu
= cu
;
9945 /* If the compiler has nested DW_AT_imported_declaration DIEs,
9946 keep inspecting DIEs until we hit the underlying import. */
9947 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
9948 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
9950 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
9954 d
= follow_die_ref (d
, attr
, &imported_cu
);
9955 if (d
->tag
!= DW_TAG_imported_declaration
)
9959 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
9961 complaint (&symfile_complaints
,
9962 _("DIE at 0x%x has too many recursively imported "
9963 "declarations"), to_underlying (d
->sect_off
));
9970 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
9972 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
9973 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
9975 /* This declaration is a global namespace alias. Add
9976 a symbol for it whose type is the aliased namespace. */
9977 new_symbol (die
, type
, cu
);
9986 /* Return the using directives repository (global or local?) to use in the
9987 current context for LANGUAGE.
9989 For Ada, imported declarations can materialize renamings, which *may* be
9990 global. However it is impossible (for now?) in DWARF to distinguish
9991 "external" imported declarations and "static" ones. As all imported
9992 declarations seem to be static in all other languages, make them all CU-wide
9993 global only in Ada. */
9995 static struct using_direct
**
9996 using_directives (enum language language
)
9998 if (language
== language_ada
&& context_stack_depth
== 0)
9999 return &global_using_directives
;
10001 return &local_using_directives
;
10004 /* Read the import statement specified by the given die and record it. */
10007 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10009 struct objfile
*objfile
= cu
->objfile
;
10010 struct attribute
*import_attr
;
10011 struct die_info
*imported_die
, *child_die
;
10012 struct dwarf2_cu
*imported_cu
;
10013 const char *imported_name
;
10014 const char *imported_name_prefix
;
10015 const char *canonical_name
;
10016 const char *import_alias
;
10017 const char *imported_declaration
= NULL
;
10018 const char *import_prefix
;
10019 std::vector
<const char *> excludes
;
10021 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10022 if (import_attr
== NULL
)
10024 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
10025 dwarf_tag_name (die
->tag
));
10030 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10031 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10032 if (imported_name
== NULL
)
10034 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10036 The import in the following code:
10050 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10051 <52> DW_AT_decl_file : 1
10052 <53> DW_AT_decl_line : 6
10053 <54> DW_AT_import : <0x75>
10054 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10055 <59> DW_AT_name : B
10056 <5b> DW_AT_decl_file : 1
10057 <5c> DW_AT_decl_line : 2
10058 <5d> DW_AT_type : <0x6e>
10060 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10061 <76> DW_AT_byte_size : 4
10062 <77> DW_AT_encoding : 5 (signed)
10064 imports the wrong die ( 0x75 instead of 0x58 ).
10065 This case will be ignored until the gcc bug is fixed. */
10069 /* Figure out the local name after import. */
10070 import_alias
= dwarf2_name (die
, cu
);
10072 /* Figure out where the statement is being imported to. */
10073 import_prefix
= determine_prefix (die
, cu
);
10075 /* Figure out what the scope of the imported die is and prepend it
10076 to the name of the imported die. */
10077 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10079 if (imported_die
->tag
!= DW_TAG_namespace
10080 && imported_die
->tag
!= DW_TAG_module
)
10082 imported_declaration
= imported_name
;
10083 canonical_name
= imported_name_prefix
;
10085 else if (strlen (imported_name_prefix
) > 0)
10086 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10087 imported_name_prefix
,
10088 (cu
->language
== language_d
? "." : "::"),
10089 imported_name
, (char *) NULL
);
10091 canonical_name
= imported_name
;
10093 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10094 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10095 child_die
= sibling_die (child_die
))
10097 /* DWARF-4: A Fortran use statement with a “rename list” may be
10098 represented by an imported module entry with an import attribute
10099 referring to the module and owned entries corresponding to those
10100 entities that are renamed as part of being imported. */
10102 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10104 complaint (&symfile_complaints
,
10105 _("child DW_TAG_imported_declaration expected "
10106 "- DIE at 0x%x [in module %s]"),
10107 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
10111 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10112 if (import_attr
== NULL
)
10114 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
10115 dwarf_tag_name (child_die
->tag
));
10120 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10122 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10123 if (imported_name
== NULL
)
10125 complaint (&symfile_complaints
,
10126 _("child DW_TAG_imported_declaration has unknown "
10127 "imported name - DIE at 0x%x [in module %s]"),
10128 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
10132 excludes
.push_back (imported_name
);
10134 process_die (child_die
, cu
);
10137 add_using_directive (using_directives (cu
->language
),
10141 imported_declaration
,
10144 &objfile
->objfile_obstack
);
10147 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10148 types, but gives them a size of zero. Starting with version 14,
10149 ICC is compatible with GCC. */
10152 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10154 if (!cu
->checked_producer
)
10155 check_producer (cu
);
10157 return cu
->producer_is_icc_lt_14
;
10160 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
10161 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
10162 this, it was first present in GCC release 4.3.0. */
10165 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
10167 if (!cu
->checked_producer
)
10168 check_producer (cu
);
10170 return cu
->producer_is_gcc_lt_4_3
;
10173 static file_and_directory
10174 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
10176 file_and_directory res
;
10178 /* Find the filename. Do not use dwarf2_name here, since the filename
10179 is not a source language identifier. */
10180 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
10181 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
10183 if (res
.comp_dir
== NULL
10184 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
10185 && IS_ABSOLUTE_PATH (res
.name
))
10187 res
.comp_dir_storage
= ldirname (res
.name
);
10188 if (!res
.comp_dir_storage
.empty ())
10189 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
10191 if (res
.comp_dir
!= NULL
)
10193 /* Irix 6.2 native cc prepends <machine>.: to the compilation
10194 directory, get rid of it. */
10195 const char *cp
= strchr (res
.comp_dir
, ':');
10197 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
10198 res
.comp_dir
= cp
+ 1;
10201 if (res
.name
== NULL
)
10202 res
.name
= "<unknown>";
10207 /* Handle DW_AT_stmt_list for a compilation unit.
10208 DIE is the DW_TAG_compile_unit die for CU.
10209 COMP_DIR is the compilation directory. LOWPC is passed to
10210 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
10213 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
10214 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
10216 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10217 struct attribute
*attr
;
10218 struct line_header line_header_local
;
10219 hashval_t line_header_local_hash
;
10222 int decode_mapping
;
10224 gdb_assert (! cu
->per_cu
->is_debug_types
);
10226 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10230 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10232 /* The line header hash table is only created if needed (it exists to
10233 prevent redundant reading of the line table for partial_units).
10234 If we're given a partial_unit, we'll need it. If we're given a
10235 compile_unit, then use the line header hash table if it's already
10236 created, but don't create one just yet. */
10238 if (dwarf2_per_objfile
->line_header_hash
== NULL
10239 && die
->tag
== DW_TAG_partial_unit
)
10241 dwarf2_per_objfile
->line_header_hash
10242 = htab_create_alloc_ex (127, line_header_hash_voidp
,
10243 line_header_eq_voidp
,
10244 free_line_header_voidp
,
10245 &objfile
->objfile_obstack
,
10246 hashtab_obstack_allocate
,
10247 dummy_obstack_deallocate
);
10250 line_header_local
.sect_off
= line_offset
;
10251 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
10252 line_header_local_hash
= line_header_hash (&line_header_local
);
10253 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
10255 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
10256 &line_header_local
,
10257 line_header_local_hash
, NO_INSERT
);
10259 /* For DW_TAG_compile_unit we need info like symtab::linetable which
10260 is not present in *SLOT (since if there is something in *SLOT then
10261 it will be for a partial_unit). */
10262 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
10264 gdb_assert (*slot
!= NULL
);
10265 cu
->line_header
= (struct line_header
*) *slot
;
10270 /* dwarf_decode_line_header does not yet provide sufficient information.
10271 We always have to call also dwarf_decode_lines for it. */
10272 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
10276 cu
->line_header
= lh
.release ();
10277 cu
->line_header_die_owner
= die
;
10279 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
10283 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
10284 &line_header_local
,
10285 line_header_local_hash
, INSERT
);
10286 gdb_assert (slot
!= NULL
);
10288 if (slot
!= NULL
&& *slot
== NULL
)
10290 /* This newly decoded line number information unit will be owned
10291 by line_header_hash hash table. */
10292 *slot
= cu
->line_header
;
10293 cu
->line_header_die_owner
= NULL
;
10297 /* We cannot free any current entry in (*slot) as that struct line_header
10298 may be already used by multiple CUs. Create only temporary decoded
10299 line_header for this CU - it may happen at most once for each line
10300 number information unit. And if we're not using line_header_hash
10301 then this is what we want as well. */
10302 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
10304 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
10305 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
10310 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
10313 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10315 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10316 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10317 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
10318 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
10319 struct attribute
*attr
;
10320 struct die_info
*child_die
;
10321 CORE_ADDR baseaddr
;
10323 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10325 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
10327 /* If we didn't find a lowpc, set it to highpc to avoid complaints
10328 from finish_block. */
10329 if (lowpc
== ((CORE_ADDR
) -1))
10331 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
10333 file_and_directory fnd
= find_file_and_directory (die
, cu
);
10335 prepare_one_comp_unit (cu
, die
, cu
->language
);
10337 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
10338 standardised yet. As a workaround for the language detection we fall
10339 back to the DW_AT_producer string. */
10340 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
10341 cu
->language
= language_opencl
;
10343 /* Similar hack for Go. */
10344 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
10345 set_cu_language (DW_LANG_Go
, cu
);
10347 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
10349 /* Decode line number information if present. We do this before
10350 processing child DIEs, so that the line header table is available
10351 for DW_AT_decl_file. */
10352 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
10354 /* Process all dies in compilation unit. */
10355 if (die
->child
!= NULL
)
10357 child_die
= die
->child
;
10358 while (child_die
&& child_die
->tag
)
10360 process_die (child_die
, cu
);
10361 child_die
= sibling_die (child_die
);
10365 /* Decode macro information, if present. Dwarf 2 macro information
10366 refers to information in the line number info statement program
10367 header, so we can only read it if we've read the header
10369 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
10371 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
10372 if (attr
&& cu
->line_header
)
10374 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
10375 complaint (&symfile_complaints
,
10376 _("CU refers to both DW_AT_macros and DW_AT_macro_info"));
10378 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
10382 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
10383 if (attr
&& cu
->line_header
)
10385 unsigned int macro_offset
= DW_UNSND (attr
);
10387 dwarf_decode_macros (cu
, macro_offset
, 0);
10392 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
10393 Create the set of symtabs used by this TU, or if this TU is sharing
10394 symtabs with another TU and the symtabs have already been created
10395 then restore those symtabs in the line header.
10396 We don't need the pc/line-number mapping for type units. */
10399 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
10401 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
10402 struct type_unit_group
*tu_group
;
10404 struct attribute
*attr
;
10406 struct signatured_type
*sig_type
;
10408 gdb_assert (per_cu
->is_debug_types
);
10409 sig_type
= (struct signatured_type
*) per_cu
;
10411 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10413 /* If we're using .gdb_index (includes -readnow) then
10414 per_cu->type_unit_group may not have been set up yet. */
10415 if (sig_type
->type_unit_group
== NULL
)
10416 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
10417 tu_group
= sig_type
->type_unit_group
;
10419 /* If we've already processed this stmt_list there's no real need to
10420 do it again, we could fake it and just recreate the part we need
10421 (file name,index -> symtab mapping). If data shows this optimization
10422 is useful we can do it then. */
10423 first_time
= tu_group
->compunit_symtab
== NULL
;
10425 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
10430 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10431 lh
= dwarf_decode_line_header (line_offset
, cu
);
10436 dwarf2_start_symtab (cu
, "", NULL
, 0);
10439 gdb_assert (tu_group
->symtabs
== NULL
);
10440 restart_symtab (tu_group
->compunit_symtab
, "", 0);
10445 cu
->line_header
= lh
.release ();
10446 cu
->line_header_die_owner
= die
;
10450 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
10452 /* Note: We don't assign tu_group->compunit_symtab yet because we're
10453 still initializing it, and our caller (a few levels up)
10454 process_full_type_unit still needs to know if this is the first
10457 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
10458 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
10459 cu
->line_header
->file_names
.size ());
10461 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
10463 file_entry
&fe
= cu
->line_header
->file_names
[i
];
10465 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
10467 if (current_subfile
->symtab
== NULL
)
10469 /* NOTE: start_subfile will recognize when it's been
10470 passed a file it has already seen. So we can't
10471 assume there's a simple mapping from
10472 cu->line_header->file_names to subfiles, plus
10473 cu->line_header->file_names may contain dups. */
10474 current_subfile
->symtab
10475 = allocate_symtab (cust
, current_subfile
->name
);
10478 fe
.symtab
= current_subfile
->symtab
;
10479 tu_group
->symtabs
[i
] = fe
.symtab
;
10484 restart_symtab (tu_group
->compunit_symtab
, "", 0);
10486 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
10488 file_entry
&fe
= cu
->line_header
->file_names
[i
];
10490 fe
.symtab
= tu_group
->symtabs
[i
];
10494 /* The main symtab is allocated last. Type units don't have DW_AT_name
10495 so they don't have a "real" (so to speak) symtab anyway.
10496 There is later code that will assign the main symtab to all symbols
10497 that don't have one. We need to handle the case of a symbol with a
10498 missing symtab (DW_AT_decl_file) anyway. */
10501 /* Process DW_TAG_type_unit.
10502 For TUs we want to skip the first top level sibling if it's not the
10503 actual type being defined by this TU. In this case the first top
10504 level sibling is there to provide context only. */
10507 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10509 struct die_info
*child_die
;
10511 prepare_one_comp_unit (cu
, die
, language_minimal
);
10513 /* Initialize (or reinitialize) the machinery for building symtabs.
10514 We do this before processing child DIEs, so that the line header table
10515 is available for DW_AT_decl_file. */
10516 setup_type_unit_groups (die
, cu
);
10518 if (die
->child
!= NULL
)
10520 child_die
= die
->child
;
10521 while (child_die
&& child_die
->tag
)
10523 process_die (child_die
, cu
);
10524 child_die
= sibling_die (child_die
);
10531 http://gcc.gnu.org/wiki/DebugFission
10532 http://gcc.gnu.org/wiki/DebugFissionDWP
10534 To simplify handling of both DWO files ("object" files with the DWARF info)
10535 and DWP files (a file with the DWOs packaged up into one file), we treat
10536 DWP files as having a collection of virtual DWO files. */
10539 hash_dwo_file (const void *item
)
10541 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
10544 hash
= htab_hash_string (dwo_file
->dwo_name
);
10545 if (dwo_file
->comp_dir
!= NULL
)
10546 hash
+= htab_hash_string (dwo_file
->comp_dir
);
10551 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
10553 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
10554 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
10556 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
10558 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
10559 return lhs
->comp_dir
== rhs
->comp_dir
;
10560 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
10563 /* Allocate a hash table for DWO files. */
10566 allocate_dwo_file_hash_table (void)
10568 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10570 return htab_create_alloc_ex (41,
10574 &objfile
->objfile_obstack
,
10575 hashtab_obstack_allocate
,
10576 dummy_obstack_deallocate
);
10579 /* Lookup DWO file DWO_NAME. */
10582 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
10584 struct dwo_file find_entry
;
10587 if (dwarf2_per_objfile
->dwo_files
== NULL
)
10588 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
10590 memset (&find_entry
, 0, sizeof (find_entry
));
10591 find_entry
.dwo_name
= dwo_name
;
10592 find_entry
.comp_dir
= comp_dir
;
10593 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
10599 hash_dwo_unit (const void *item
)
10601 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
10603 /* This drops the top 32 bits of the id, but is ok for a hash. */
10604 return dwo_unit
->signature
;
10608 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
10610 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
10611 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
10613 /* The signature is assumed to be unique within the DWO file.
10614 So while object file CU dwo_id's always have the value zero,
10615 that's OK, assuming each object file DWO file has only one CU,
10616 and that's the rule for now. */
10617 return lhs
->signature
== rhs
->signature
;
10620 /* Allocate a hash table for DWO CUs,TUs.
10621 There is one of these tables for each of CUs,TUs for each DWO file. */
10624 allocate_dwo_unit_table (struct objfile
*objfile
)
10626 /* Start out with a pretty small number.
10627 Generally DWO files contain only one CU and maybe some TUs. */
10628 return htab_create_alloc_ex (3,
10632 &objfile
->objfile_obstack
,
10633 hashtab_obstack_allocate
,
10634 dummy_obstack_deallocate
);
10637 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
10639 struct create_dwo_cu_data
10641 struct dwo_file
*dwo_file
;
10642 struct dwo_unit dwo_unit
;
10645 /* die_reader_func for create_dwo_cu. */
10648 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
10649 const gdb_byte
*info_ptr
,
10650 struct die_info
*comp_unit_die
,
10654 struct dwarf2_cu
*cu
= reader
->cu
;
10655 sect_offset sect_off
= cu
->per_cu
->sect_off
;
10656 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
10657 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
10658 struct dwo_file
*dwo_file
= data
->dwo_file
;
10659 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
10660 struct attribute
*attr
;
10662 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
10665 complaint (&symfile_complaints
,
10666 _("Dwarf Error: debug entry at offset 0x%x is missing"
10667 " its dwo_id [in module %s]"),
10668 to_underlying (sect_off
), dwo_file
->dwo_name
);
10672 dwo_unit
->dwo_file
= dwo_file
;
10673 dwo_unit
->signature
= DW_UNSND (attr
);
10674 dwo_unit
->section
= section
;
10675 dwo_unit
->sect_off
= sect_off
;
10676 dwo_unit
->length
= cu
->per_cu
->length
;
10678 if (dwarf_read_debug
)
10679 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
10680 to_underlying (sect_off
),
10681 hex_string (dwo_unit
->signature
));
10684 /* Create the dwo_units for the CUs in a DWO_FILE.
10685 Note: This function processes DWO files only, not DWP files. */
10688 create_cus_hash_table (struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
10691 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10692 const struct dwarf2_section_info
*abbrev_section
= &dwo_file
.sections
.abbrev
;
10693 const gdb_byte
*info_ptr
, *end_ptr
;
10695 dwarf2_read_section (objfile
, §ion
);
10696 info_ptr
= section
.buffer
;
10698 if (info_ptr
== NULL
)
10701 if (dwarf_read_debug
)
10703 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
10704 get_section_name (§ion
),
10705 get_section_file_name (§ion
));
10708 end_ptr
= info_ptr
+ section
.size
;
10709 while (info_ptr
< end_ptr
)
10711 struct dwarf2_per_cu_data per_cu
;
10712 struct create_dwo_cu_data create_dwo_cu_data
;
10713 struct dwo_unit
*dwo_unit
;
10715 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
10717 memset (&create_dwo_cu_data
.dwo_unit
, 0,
10718 sizeof (create_dwo_cu_data
.dwo_unit
));
10719 memset (&per_cu
, 0, sizeof (per_cu
));
10720 per_cu
.objfile
= objfile
;
10721 per_cu
.is_debug_types
= 0;
10722 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
10723 per_cu
.section
= §ion
;
10724 create_dwo_cu_data
.dwo_file
= &dwo_file
;
10726 init_cutu_and_read_dies_no_follow (
10727 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
10728 info_ptr
+= per_cu
.length
;
10730 // If the unit could not be parsed, skip it.
10731 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
10734 if (cus_htab
== NULL
)
10735 cus_htab
= allocate_dwo_unit_table (objfile
);
10737 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10738 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
10739 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
10740 gdb_assert (slot
!= NULL
);
10743 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
10744 sect_offset dup_sect_off
= dup_cu
->sect_off
;
10746 complaint (&symfile_complaints
,
10747 _("debug cu entry at offset 0x%x is duplicate to"
10748 " the entry at offset 0x%x, signature %s"),
10749 to_underlying (sect_off
), to_underlying (dup_sect_off
),
10750 hex_string (dwo_unit
->signature
));
10752 *slot
= (void *)dwo_unit
;
10756 /* DWP file .debug_{cu,tu}_index section format:
10757 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
10761 Both index sections have the same format, and serve to map a 64-bit
10762 signature to a set of section numbers. Each section begins with a header,
10763 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
10764 indexes, and a pool of 32-bit section numbers. The index sections will be
10765 aligned at 8-byte boundaries in the file.
10767 The index section header consists of:
10769 V, 32 bit version number
10771 N, 32 bit number of compilation units or type units in the index
10772 M, 32 bit number of slots in the hash table
10774 Numbers are recorded using the byte order of the application binary.
10776 The hash table begins at offset 16 in the section, and consists of an array
10777 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
10778 order of the application binary). Unused slots in the hash table are 0.
10779 (We rely on the extreme unlikeliness of a signature being exactly 0.)
10781 The parallel table begins immediately after the hash table
10782 (at offset 16 + 8 * M from the beginning of the section), and consists of an
10783 array of 32-bit indexes (using the byte order of the application binary),
10784 corresponding 1-1 with slots in the hash table. Each entry in the parallel
10785 table contains a 32-bit index into the pool of section numbers. For unused
10786 hash table slots, the corresponding entry in the parallel table will be 0.
10788 The pool of section numbers begins immediately following the hash table
10789 (at offset 16 + 12 * M from the beginning of the section). The pool of
10790 section numbers consists of an array of 32-bit words (using the byte order
10791 of the application binary). Each item in the array is indexed starting
10792 from 0. The hash table entry provides the index of the first section
10793 number in the set. Additional section numbers in the set follow, and the
10794 set is terminated by a 0 entry (section number 0 is not used in ELF).
10796 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
10797 section must be the first entry in the set, and the .debug_abbrev.dwo must
10798 be the second entry. Other members of the set may follow in any order.
10804 DWP Version 2 combines all the .debug_info, etc. sections into one,
10805 and the entries in the index tables are now offsets into these sections.
10806 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
10809 Index Section Contents:
10811 Hash Table of Signatures dwp_hash_table.hash_table
10812 Parallel Table of Indices dwp_hash_table.unit_table
10813 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
10814 Table of Section Sizes dwp_hash_table.v2.sizes
10816 The index section header consists of:
10818 V, 32 bit version number
10819 L, 32 bit number of columns in the table of section offsets
10820 N, 32 bit number of compilation units or type units in the index
10821 M, 32 bit number of slots in the hash table
10823 Numbers are recorded using the byte order of the application binary.
10825 The hash table has the same format as version 1.
10826 The parallel table of indices has the same format as version 1,
10827 except that the entries are origin-1 indices into the table of sections
10828 offsets and the table of section sizes.
10830 The table of offsets begins immediately following the parallel table
10831 (at offset 16 + 12 * M from the beginning of the section). The table is
10832 a two-dimensional array of 32-bit words (using the byte order of the
10833 application binary), with L columns and N+1 rows, in row-major order.
10834 Each row in the array is indexed starting from 0. The first row provides
10835 a key to the remaining rows: each column in this row provides an identifier
10836 for a debug section, and the offsets in the same column of subsequent rows
10837 refer to that section. The section identifiers are:
10839 DW_SECT_INFO 1 .debug_info.dwo
10840 DW_SECT_TYPES 2 .debug_types.dwo
10841 DW_SECT_ABBREV 3 .debug_abbrev.dwo
10842 DW_SECT_LINE 4 .debug_line.dwo
10843 DW_SECT_LOC 5 .debug_loc.dwo
10844 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
10845 DW_SECT_MACINFO 7 .debug_macinfo.dwo
10846 DW_SECT_MACRO 8 .debug_macro.dwo
10848 The offsets provided by the CU and TU index sections are the base offsets
10849 for the contributions made by each CU or TU to the corresponding section
10850 in the package file. Each CU and TU header contains an abbrev_offset
10851 field, used to find the abbreviations table for that CU or TU within the
10852 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
10853 be interpreted as relative to the base offset given in the index section.
10854 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
10855 should be interpreted as relative to the base offset for .debug_line.dwo,
10856 and offsets into other debug sections obtained from DWARF attributes should
10857 also be interpreted as relative to the corresponding base offset.
10859 The table of sizes begins immediately following the table of offsets.
10860 Like the table of offsets, it is a two-dimensional array of 32-bit words,
10861 with L columns and N rows, in row-major order. Each row in the array is
10862 indexed starting from 1 (row 0 is shared by the two tables).
10866 Hash table lookup is handled the same in version 1 and 2:
10868 We assume that N and M will not exceed 2^32 - 1.
10869 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
10871 Given a 64-bit compilation unit signature or a type signature S, an entry
10872 in the hash table is located as follows:
10874 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
10875 the low-order k bits all set to 1.
10877 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
10879 3) If the hash table entry at index H matches the signature, use that
10880 entry. If the hash table entry at index H is unused (all zeroes),
10881 terminate the search: the signature is not present in the table.
10883 4) Let H = (H + H') modulo M. Repeat at Step 3.
10885 Because M > N and H' and M are relatively prime, the search is guaranteed
10886 to stop at an unused slot or find the match. */
10888 /* Create a hash table to map DWO IDs to their CU/TU entry in
10889 .debug_{info,types}.dwo in DWP_FILE.
10890 Returns NULL if there isn't one.
10891 Note: This function processes DWP files only, not DWO files. */
10893 static struct dwp_hash_table
*
10894 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
10896 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10897 bfd
*dbfd
= dwp_file
->dbfd
;
10898 const gdb_byte
*index_ptr
, *index_end
;
10899 struct dwarf2_section_info
*index
;
10900 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
10901 struct dwp_hash_table
*htab
;
10903 if (is_debug_types
)
10904 index
= &dwp_file
->sections
.tu_index
;
10906 index
= &dwp_file
->sections
.cu_index
;
10908 if (dwarf2_section_empty_p (index
))
10910 dwarf2_read_section (objfile
, index
);
10912 index_ptr
= index
->buffer
;
10913 index_end
= index_ptr
+ index
->size
;
10915 version
= read_4_bytes (dbfd
, index_ptr
);
10918 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
10922 nr_units
= read_4_bytes (dbfd
, index_ptr
);
10924 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
10927 if (version
!= 1 && version
!= 2)
10929 error (_("Dwarf Error: unsupported DWP file version (%s)"
10930 " [in module %s]"),
10931 pulongest (version
), dwp_file
->name
);
10933 if (nr_slots
!= (nr_slots
& -nr_slots
))
10935 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
10936 " is not power of 2 [in module %s]"),
10937 pulongest (nr_slots
), dwp_file
->name
);
10940 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
10941 htab
->version
= version
;
10942 htab
->nr_columns
= nr_columns
;
10943 htab
->nr_units
= nr_units
;
10944 htab
->nr_slots
= nr_slots
;
10945 htab
->hash_table
= index_ptr
;
10946 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
10948 /* Exit early if the table is empty. */
10949 if (nr_slots
== 0 || nr_units
== 0
10950 || (version
== 2 && nr_columns
== 0))
10952 /* All must be zero. */
10953 if (nr_slots
!= 0 || nr_units
!= 0
10954 || (version
== 2 && nr_columns
!= 0))
10956 complaint (&symfile_complaints
,
10957 _("Empty DWP but nr_slots,nr_units,nr_columns not"
10958 " all zero [in modules %s]"),
10966 htab
->section_pool
.v1
.indices
=
10967 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
10968 /* It's harder to decide whether the section is too small in v1.
10969 V1 is deprecated anyway so we punt. */
10973 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
10974 int *ids
= htab
->section_pool
.v2
.section_ids
;
10975 /* Reverse map for error checking. */
10976 int ids_seen
[DW_SECT_MAX
+ 1];
10979 if (nr_columns
< 2)
10981 error (_("Dwarf Error: bad DWP hash table, too few columns"
10982 " in section table [in module %s]"),
10985 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
10987 error (_("Dwarf Error: bad DWP hash table, too many columns"
10988 " in section table [in module %s]"),
10991 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
10992 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
10993 for (i
= 0; i
< nr_columns
; ++i
)
10995 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
10997 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
10999 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11000 " in section table [in module %s]"),
11001 id
, dwp_file
->name
);
11003 if (ids_seen
[id
] != -1)
11005 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11006 " id %d in section table [in module %s]"),
11007 id
, dwp_file
->name
);
11012 /* Must have exactly one info or types section. */
11013 if (((ids_seen
[DW_SECT_INFO
] != -1)
11014 + (ids_seen
[DW_SECT_TYPES
] != -1))
11017 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11018 " DWO info/types section [in module %s]"),
11021 /* Must have an abbrev section. */
11022 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11024 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11025 " section [in module %s]"),
11028 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11029 htab
->section_pool
.v2
.sizes
=
11030 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11031 * nr_units
* nr_columns
);
11032 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11033 * nr_units
* nr_columns
))
11036 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11037 " [in module %s]"),
11045 /* Update SECTIONS with the data from SECTP.
11047 This function is like the other "locate" section routines that are
11048 passed to bfd_map_over_sections, but in this context the sections to
11049 read comes from the DWP V1 hash table, not the full ELF section table.
11051 The result is non-zero for success, or zero if an error was found. */
11054 locate_v1_virtual_dwo_sections (asection
*sectp
,
11055 struct virtual_v1_dwo_sections
*sections
)
11057 const struct dwop_section_names
*names
= &dwop_section_names
;
11059 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11061 /* There can be only one. */
11062 if (sections
->abbrev
.s
.section
!= NULL
)
11064 sections
->abbrev
.s
.section
= sectp
;
11065 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
11067 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11068 || section_is_p (sectp
->name
, &names
->types_dwo
))
11070 /* There can be only one. */
11071 if (sections
->info_or_types
.s
.section
!= NULL
)
11073 sections
->info_or_types
.s
.section
= sectp
;
11074 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
11076 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11078 /* There can be only one. */
11079 if (sections
->line
.s
.section
!= NULL
)
11081 sections
->line
.s
.section
= sectp
;
11082 sections
->line
.size
= bfd_get_section_size (sectp
);
11084 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11086 /* There can be only one. */
11087 if (sections
->loc
.s
.section
!= NULL
)
11089 sections
->loc
.s
.section
= sectp
;
11090 sections
->loc
.size
= bfd_get_section_size (sectp
);
11092 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11094 /* There can be only one. */
11095 if (sections
->macinfo
.s
.section
!= NULL
)
11097 sections
->macinfo
.s
.section
= sectp
;
11098 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
11100 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11102 /* There can be only one. */
11103 if (sections
->macro
.s
.section
!= NULL
)
11105 sections
->macro
.s
.section
= sectp
;
11106 sections
->macro
.size
= bfd_get_section_size (sectp
);
11108 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11110 /* There can be only one. */
11111 if (sections
->str_offsets
.s
.section
!= NULL
)
11113 sections
->str_offsets
.s
.section
= sectp
;
11114 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
11118 /* No other kind of section is valid. */
11125 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11126 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11127 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11128 This is for DWP version 1 files. */
11130 static struct dwo_unit
*
11131 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
11132 uint32_t unit_index
,
11133 const char *comp_dir
,
11134 ULONGEST signature
, int is_debug_types
)
11136 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11137 const struct dwp_hash_table
*dwp_htab
=
11138 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11139 bfd
*dbfd
= dwp_file
->dbfd
;
11140 const char *kind
= is_debug_types
? "TU" : "CU";
11141 struct dwo_file
*dwo_file
;
11142 struct dwo_unit
*dwo_unit
;
11143 struct virtual_v1_dwo_sections sections
;
11144 void **dwo_file_slot
;
11147 gdb_assert (dwp_file
->version
== 1);
11149 if (dwarf_read_debug
)
11151 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
11153 pulongest (unit_index
), hex_string (signature
),
11157 /* Fetch the sections of this DWO unit.
11158 Put a limit on the number of sections we look for so that bad data
11159 doesn't cause us to loop forever. */
11161 #define MAX_NR_V1_DWO_SECTIONS \
11162 (1 /* .debug_info or .debug_types */ \
11163 + 1 /* .debug_abbrev */ \
11164 + 1 /* .debug_line */ \
11165 + 1 /* .debug_loc */ \
11166 + 1 /* .debug_str_offsets */ \
11167 + 1 /* .debug_macro or .debug_macinfo */ \
11168 + 1 /* trailing zero */)
11170 memset (§ions
, 0, sizeof (sections
));
11172 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
11175 uint32_t section_nr
=
11176 read_4_bytes (dbfd
,
11177 dwp_htab
->section_pool
.v1
.indices
11178 + (unit_index
+ i
) * sizeof (uint32_t));
11180 if (section_nr
== 0)
11182 if (section_nr
>= dwp_file
->num_sections
)
11184 error (_("Dwarf Error: bad DWP hash table, section number too large"
11185 " [in module %s]"),
11189 sectp
= dwp_file
->elf_sections
[section_nr
];
11190 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
11192 error (_("Dwarf Error: bad DWP hash table, invalid section found"
11193 " [in module %s]"),
11199 || dwarf2_section_empty_p (§ions
.info_or_types
)
11200 || dwarf2_section_empty_p (§ions
.abbrev
))
11202 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
11203 " [in module %s]"),
11206 if (i
== MAX_NR_V1_DWO_SECTIONS
)
11208 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
11209 " [in module %s]"),
11213 /* It's easier for the rest of the code if we fake a struct dwo_file and
11214 have dwo_unit "live" in that. At least for now.
11216 The DWP file can be made up of a random collection of CUs and TUs.
11217 However, for each CU + set of TUs that came from the same original DWO
11218 file, we can combine them back into a virtual DWO file to save space
11219 (fewer struct dwo_file objects to allocate). Remember that for really
11220 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11222 std::string virtual_dwo_name
=
11223 string_printf ("virtual-dwo/%d-%d-%d-%d",
11224 get_section_id (§ions
.abbrev
),
11225 get_section_id (§ions
.line
),
11226 get_section_id (§ions
.loc
),
11227 get_section_id (§ions
.str_offsets
));
11228 /* Can we use an existing virtual DWO file? */
11229 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
.c_str (), comp_dir
);
11230 /* Create one if necessary. */
11231 if (*dwo_file_slot
== NULL
)
11233 if (dwarf_read_debug
)
11235 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11236 virtual_dwo_name
.c_str ());
11238 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
11240 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
11241 virtual_dwo_name
.c_str (),
11242 virtual_dwo_name
.size ());
11243 dwo_file
->comp_dir
= comp_dir
;
11244 dwo_file
->sections
.abbrev
= sections
.abbrev
;
11245 dwo_file
->sections
.line
= sections
.line
;
11246 dwo_file
->sections
.loc
= sections
.loc
;
11247 dwo_file
->sections
.macinfo
= sections
.macinfo
;
11248 dwo_file
->sections
.macro
= sections
.macro
;
11249 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
11250 /* The "str" section is global to the entire DWP file. */
11251 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11252 /* The info or types section is assigned below to dwo_unit,
11253 there's no need to record it in dwo_file.
11254 Also, we can't simply record type sections in dwo_file because
11255 we record a pointer into the vector in dwo_unit. As we collect more
11256 types we'll grow the vector and eventually have to reallocate space
11257 for it, invalidating all copies of pointers into the previous
11259 *dwo_file_slot
= dwo_file
;
11263 if (dwarf_read_debug
)
11265 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11266 virtual_dwo_name
.c_str ());
11268 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11271 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11272 dwo_unit
->dwo_file
= dwo_file
;
11273 dwo_unit
->signature
= signature
;
11274 dwo_unit
->section
=
11275 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11276 *dwo_unit
->section
= sections
.info_or_types
;
11277 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11282 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
11283 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
11284 piece within that section used by a TU/CU, return a virtual section
11285 of just that piece. */
11287 static struct dwarf2_section_info
11288 create_dwp_v2_section (struct dwarf2_section_info
*section
,
11289 bfd_size_type offset
, bfd_size_type size
)
11291 struct dwarf2_section_info result
;
11294 gdb_assert (section
!= NULL
);
11295 gdb_assert (!section
->is_virtual
);
11297 memset (&result
, 0, sizeof (result
));
11298 result
.s
.containing_section
= section
;
11299 result
.is_virtual
= 1;
11304 sectp
= get_section_bfd_section (section
);
11306 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
11307 bounds of the real section. This is a pretty-rare event, so just
11308 flag an error (easier) instead of a warning and trying to cope. */
11310 || offset
+ size
> bfd_get_section_size (sectp
))
11312 bfd
*abfd
= sectp
->owner
;
11314 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
11315 " in section %s [in module %s]"),
11316 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
11317 objfile_name (dwarf2_per_objfile
->objfile
));
11320 result
.virtual_offset
= offset
;
11321 result
.size
= size
;
11325 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11326 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11327 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11328 This is for DWP version 2 files. */
11330 static struct dwo_unit
*
11331 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
11332 uint32_t unit_index
,
11333 const char *comp_dir
,
11334 ULONGEST signature
, int is_debug_types
)
11336 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11337 const struct dwp_hash_table
*dwp_htab
=
11338 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11339 bfd
*dbfd
= dwp_file
->dbfd
;
11340 const char *kind
= is_debug_types
? "TU" : "CU";
11341 struct dwo_file
*dwo_file
;
11342 struct dwo_unit
*dwo_unit
;
11343 struct virtual_v2_dwo_sections sections
;
11344 void **dwo_file_slot
;
11347 gdb_assert (dwp_file
->version
== 2);
11349 if (dwarf_read_debug
)
11351 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
11353 pulongest (unit_index
), hex_string (signature
),
11357 /* Fetch the section offsets of this DWO unit. */
11359 memset (§ions
, 0, sizeof (sections
));
11361 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
11363 uint32_t offset
= read_4_bytes (dbfd
,
11364 dwp_htab
->section_pool
.v2
.offsets
11365 + (((unit_index
- 1) * dwp_htab
->nr_columns
11367 * sizeof (uint32_t)));
11368 uint32_t size
= read_4_bytes (dbfd
,
11369 dwp_htab
->section_pool
.v2
.sizes
11370 + (((unit_index
- 1) * dwp_htab
->nr_columns
11372 * sizeof (uint32_t)));
11374 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
11377 case DW_SECT_TYPES
:
11378 sections
.info_or_types_offset
= offset
;
11379 sections
.info_or_types_size
= size
;
11381 case DW_SECT_ABBREV
:
11382 sections
.abbrev_offset
= offset
;
11383 sections
.abbrev_size
= size
;
11386 sections
.line_offset
= offset
;
11387 sections
.line_size
= size
;
11390 sections
.loc_offset
= offset
;
11391 sections
.loc_size
= size
;
11393 case DW_SECT_STR_OFFSETS
:
11394 sections
.str_offsets_offset
= offset
;
11395 sections
.str_offsets_size
= size
;
11397 case DW_SECT_MACINFO
:
11398 sections
.macinfo_offset
= offset
;
11399 sections
.macinfo_size
= size
;
11401 case DW_SECT_MACRO
:
11402 sections
.macro_offset
= offset
;
11403 sections
.macro_size
= size
;
11408 /* It's easier for the rest of the code if we fake a struct dwo_file and
11409 have dwo_unit "live" in that. At least for now.
11411 The DWP file can be made up of a random collection of CUs and TUs.
11412 However, for each CU + set of TUs that came from the same original DWO
11413 file, we can combine them back into a virtual DWO file to save space
11414 (fewer struct dwo_file objects to allocate). Remember that for really
11415 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11417 std::string virtual_dwo_name
=
11418 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
11419 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
11420 (long) (sections
.line_size
? sections
.line_offset
: 0),
11421 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
11422 (long) (sections
.str_offsets_size
11423 ? sections
.str_offsets_offset
: 0));
11424 /* Can we use an existing virtual DWO file? */
11425 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
.c_str (), comp_dir
);
11426 /* Create one if necessary. */
11427 if (*dwo_file_slot
== NULL
)
11429 if (dwarf_read_debug
)
11431 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11432 virtual_dwo_name
.c_str ());
11434 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
11436 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
11437 virtual_dwo_name
.c_str (),
11438 virtual_dwo_name
.size ());
11439 dwo_file
->comp_dir
= comp_dir
;
11440 dwo_file
->sections
.abbrev
=
11441 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
11442 sections
.abbrev_offset
, sections
.abbrev_size
);
11443 dwo_file
->sections
.line
=
11444 create_dwp_v2_section (&dwp_file
->sections
.line
,
11445 sections
.line_offset
, sections
.line_size
);
11446 dwo_file
->sections
.loc
=
11447 create_dwp_v2_section (&dwp_file
->sections
.loc
,
11448 sections
.loc_offset
, sections
.loc_size
);
11449 dwo_file
->sections
.macinfo
=
11450 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
11451 sections
.macinfo_offset
, sections
.macinfo_size
);
11452 dwo_file
->sections
.macro
=
11453 create_dwp_v2_section (&dwp_file
->sections
.macro
,
11454 sections
.macro_offset
, sections
.macro_size
);
11455 dwo_file
->sections
.str_offsets
=
11456 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
11457 sections
.str_offsets_offset
,
11458 sections
.str_offsets_size
);
11459 /* The "str" section is global to the entire DWP file. */
11460 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11461 /* The info or types section is assigned below to dwo_unit,
11462 there's no need to record it in dwo_file.
11463 Also, we can't simply record type sections in dwo_file because
11464 we record a pointer into the vector in dwo_unit. As we collect more
11465 types we'll grow the vector and eventually have to reallocate space
11466 for it, invalidating all copies of pointers into the previous
11468 *dwo_file_slot
= dwo_file
;
11472 if (dwarf_read_debug
)
11474 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11475 virtual_dwo_name
.c_str ());
11477 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11480 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11481 dwo_unit
->dwo_file
= dwo_file
;
11482 dwo_unit
->signature
= signature
;
11483 dwo_unit
->section
=
11484 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11485 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
11486 ? &dwp_file
->sections
.types
11487 : &dwp_file
->sections
.info
,
11488 sections
.info_or_types_offset
,
11489 sections
.info_or_types_size
);
11490 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11495 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
11496 Returns NULL if the signature isn't found. */
11498 static struct dwo_unit
*
11499 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
11500 ULONGEST signature
, int is_debug_types
)
11502 const struct dwp_hash_table
*dwp_htab
=
11503 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11504 bfd
*dbfd
= dwp_file
->dbfd
;
11505 uint32_t mask
= dwp_htab
->nr_slots
- 1;
11506 uint32_t hash
= signature
& mask
;
11507 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
11510 struct dwo_unit find_dwo_cu
;
11512 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
11513 find_dwo_cu
.signature
= signature
;
11514 slot
= htab_find_slot (is_debug_types
11515 ? dwp_file
->loaded_tus
11516 : dwp_file
->loaded_cus
,
11517 &find_dwo_cu
, INSERT
);
11520 return (struct dwo_unit
*) *slot
;
11522 /* Use a for loop so that we don't loop forever on bad debug info. */
11523 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
11525 ULONGEST signature_in_table
;
11527 signature_in_table
=
11528 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
11529 if (signature_in_table
== signature
)
11531 uint32_t unit_index
=
11532 read_4_bytes (dbfd
,
11533 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
11535 if (dwp_file
->version
== 1)
11537 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
11538 comp_dir
, signature
,
11543 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
11544 comp_dir
, signature
,
11547 return (struct dwo_unit
*) *slot
;
11549 if (signature_in_table
== 0)
11551 hash
= (hash
+ hash2
) & mask
;
11554 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
11555 " [in module %s]"),
11559 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
11560 Open the file specified by FILE_NAME and hand it off to BFD for
11561 preliminary analysis. Return a newly initialized bfd *, which
11562 includes a canonicalized copy of FILE_NAME.
11563 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
11564 SEARCH_CWD is true if the current directory is to be searched.
11565 It will be searched before debug-file-directory.
11566 If successful, the file is added to the bfd include table of the
11567 objfile's bfd (see gdb_bfd_record_inclusion).
11568 If unable to find/open the file, return NULL.
11569 NOTE: This function is derived from symfile_bfd_open. */
11571 static gdb_bfd_ref_ptr
11572 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
11575 char *absolute_name
;
11576 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
11577 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
11578 to debug_file_directory. */
11580 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
11584 if (*debug_file_directory
!= '\0')
11585 search_path
= concat (".", dirname_separator_string
,
11586 debug_file_directory
, (char *) NULL
);
11588 search_path
= xstrdup (".");
11591 search_path
= xstrdup (debug_file_directory
);
11593 flags
= OPF_RETURN_REALPATH
;
11595 flags
|= OPF_SEARCH_IN_PATH
;
11596 desc
= openp (search_path
, flags
, file_name
,
11597 O_RDONLY
| O_BINARY
, &absolute_name
);
11598 xfree (search_path
);
11602 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
, gnutarget
, desc
));
11603 xfree (absolute_name
);
11604 if (sym_bfd
== NULL
)
11606 bfd_set_cacheable (sym_bfd
.get (), 1);
11608 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
11611 /* Success. Record the bfd as having been included by the objfile's bfd.
11612 This is important because things like demangled_names_hash lives in the
11613 objfile's per_bfd space and may have references to things like symbol
11614 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
11615 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
11620 /* Try to open DWO file FILE_NAME.
11621 COMP_DIR is the DW_AT_comp_dir attribute.
11622 The result is the bfd handle of the file.
11623 If there is a problem finding or opening the file, return NULL.
11624 Upon success, the canonicalized path of the file is stored in the bfd,
11625 same as symfile_bfd_open. */
11627 static gdb_bfd_ref_ptr
11628 open_dwo_file (const char *file_name
, const char *comp_dir
)
11630 if (IS_ABSOLUTE_PATH (file_name
))
11631 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
11633 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
11635 if (comp_dir
!= NULL
)
11637 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
11638 file_name
, (char *) NULL
);
11640 /* NOTE: If comp_dir is a relative path, this will also try the
11641 search path, which seems useful. */
11642 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (path_to_try
, 0 /*is_dwp*/,
11643 1 /*search_cwd*/));
11644 xfree (path_to_try
);
11649 /* That didn't work, try debug-file-directory, which, despite its name,
11650 is a list of paths. */
11652 if (*debug_file_directory
== '\0')
11655 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
11658 /* This function is mapped across the sections and remembers the offset and
11659 size of each of the DWO debugging sections we are interested in. */
11662 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
11664 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
11665 const struct dwop_section_names
*names
= &dwop_section_names
;
11667 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11669 dwo_sections
->abbrev
.s
.section
= sectp
;
11670 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
11672 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
11674 dwo_sections
->info
.s
.section
= sectp
;
11675 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
11677 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11679 dwo_sections
->line
.s
.section
= sectp
;
11680 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
11682 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11684 dwo_sections
->loc
.s
.section
= sectp
;
11685 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
11687 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11689 dwo_sections
->macinfo
.s
.section
= sectp
;
11690 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
11692 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11694 dwo_sections
->macro
.s
.section
= sectp
;
11695 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
11697 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
11699 dwo_sections
->str
.s
.section
= sectp
;
11700 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
11702 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11704 dwo_sections
->str_offsets
.s
.section
= sectp
;
11705 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
11707 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
11709 struct dwarf2_section_info type_section
;
11711 memset (&type_section
, 0, sizeof (type_section
));
11712 type_section
.s
.section
= sectp
;
11713 type_section
.size
= bfd_get_section_size (sectp
);
11714 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
11719 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
11720 by PER_CU. This is for the non-DWP case.
11721 The result is NULL if DWO_NAME can't be found. */
11723 static struct dwo_file
*
11724 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
11725 const char *dwo_name
, const char *comp_dir
)
11727 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11728 struct dwo_file
*dwo_file
;
11729 struct cleanup
*cleanups
;
11731 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwo_name
, comp_dir
));
11734 if (dwarf_read_debug
)
11735 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
11738 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
11739 dwo_file
->dwo_name
= dwo_name
;
11740 dwo_file
->comp_dir
= comp_dir
;
11741 dwo_file
->dbfd
= dbfd
.release ();
11743 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
11745 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
11746 &dwo_file
->sections
);
11748 create_cus_hash_table (*dwo_file
, dwo_file
->sections
.info
, dwo_file
->cus
);
11750 create_debug_types_hash_table (dwo_file
, dwo_file
->sections
.types
,
11753 discard_cleanups (cleanups
);
11755 if (dwarf_read_debug
)
11756 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
11761 /* This function is mapped across the sections and remembers the offset and
11762 size of each of the DWP debugging sections common to version 1 and 2 that
11763 we are interested in. */
11766 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
11767 void *dwp_file_ptr
)
11769 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
11770 const struct dwop_section_names
*names
= &dwop_section_names
;
11771 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
11773 /* Record the ELF section number for later lookup: this is what the
11774 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
11775 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
11776 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
11778 /* Look for specific sections that we need. */
11779 if (section_is_p (sectp
->name
, &names
->str_dwo
))
11781 dwp_file
->sections
.str
.s
.section
= sectp
;
11782 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
11784 else if (section_is_p (sectp
->name
, &names
->cu_index
))
11786 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
11787 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
11789 else if (section_is_p (sectp
->name
, &names
->tu_index
))
11791 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
11792 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
11796 /* This function is mapped across the sections and remembers the offset and
11797 size of each of the DWP version 2 debugging sections that we are interested
11798 in. This is split into a separate function because we don't know if we
11799 have version 1 or 2 until we parse the cu_index/tu_index sections. */
11802 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
11804 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
11805 const struct dwop_section_names
*names
= &dwop_section_names
;
11806 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
11808 /* Record the ELF section number for later lookup: this is what the
11809 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
11810 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
11811 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
11813 /* Look for specific sections that we need. */
11814 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11816 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
11817 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
11819 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
11821 dwp_file
->sections
.info
.s
.section
= sectp
;
11822 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
11824 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11826 dwp_file
->sections
.line
.s
.section
= sectp
;
11827 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
11829 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11831 dwp_file
->sections
.loc
.s
.section
= sectp
;
11832 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
11834 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11836 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
11837 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
11839 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11841 dwp_file
->sections
.macro
.s
.section
= sectp
;
11842 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
11844 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11846 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
11847 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
11849 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
11851 dwp_file
->sections
.types
.s
.section
= sectp
;
11852 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
11856 /* Hash function for dwp_file loaded CUs/TUs. */
11859 hash_dwp_loaded_cutus (const void *item
)
11861 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11863 /* This drops the top 32 bits of the signature, but is ok for a hash. */
11864 return dwo_unit
->signature
;
11867 /* Equality function for dwp_file loaded CUs/TUs. */
11870 eq_dwp_loaded_cutus (const void *a
, const void *b
)
11872 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
11873 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
11875 return dua
->signature
== dub
->signature
;
11878 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
11881 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
11883 return htab_create_alloc_ex (3,
11884 hash_dwp_loaded_cutus
,
11885 eq_dwp_loaded_cutus
,
11887 &objfile
->objfile_obstack
,
11888 hashtab_obstack_allocate
,
11889 dummy_obstack_deallocate
);
11892 /* Try to open DWP file FILE_NAME.
11893 The result is the bfd handle of the file.
11894 If there is a problem finding or opening the file, return NULL.
11895 Upon success, the canonicalized path of the file is stored in the bfd,
11896 same as symfile_bfd_open. */
11898 static gdb_bfd_ref_ptr
11899 open_dwp_file (const char *file_name
)
11901 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (file_name
, 1 /*is_dwp*/,
11902 1 /*search_cwd*/));
11906 /* Work around upstream bug 15652.
11907 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
11908 [Whether that's a "bug" is debatable, but it is getting in our way.]
11909 We have no real idea where the dwp file is, because gdb's realpath-ing
11910 of the executable's path may have discarded the needed info.
11911 [IWBN if the dwp file name was recorded in the executable, akin to
11912 .gnu_debuglink, but that doesn't exist yet.]
11913 Strip the directory from FILE_NAME and search again. */
11914 if (*debug_file_directory
!= '\0')
11916 /* Don't implicitly search the current directory here.
11917 If the user wants to search "." to handle this case,
11918 it must be added to debug-file-directory. */
11919 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
11926 /* Initialize the use of the DWP file for the current objfile.
11927 By convention the name of the DWP file is ${objfile}.dwp.
11928 The result is NULL if it can't be found. */
11930 static struct dwp_file
*
11931 open_and_init_dwp_file (void)
11933 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11934 struct dwp_file
*dwp_file
;
11936 /* Try to find first .dwp for the binary file before any symbolic links
11939 /* If the objfile is a debug file, find the name of the real binary
11940 file and get the name of dwp file from there. */
11941 std::string dwp_name
;
11942 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
11944 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
11945 const char *backlink_basename
= lbasename (backlink
->original_name
);
11947 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
11950 dwp_name
= objfile
->original_name
;
11952 dwp_name
+= ".dwp";
11954 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwp_name
.c_str ()));
11956 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
11958 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
11959 dwp_name
= objfile_name (objfile
);
11960 dwp_name
+= ".dwp";
11961 dbfd
= open_dwp_file (dwp_name
.c_str ());
11966 if (dwarf_read_debug
)
11967 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
11970 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
11971 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
11972 dwp_file
->dbfd
= dbfd
.release ();
11974 /* +1: section 0 is unused */
11975 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
11976 dwp_file
->elf_sections
=
11977 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
11978 dwp_file
->num_sections
, asection
*);
11980 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
11983 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
11985 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
11987 /* The DWP file version is stored in the hash table. Oh well. */
11988 if (dwp_file
->cus
&& dwp_file
->tus
11989 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
11991 /* Technically speaking, we should try to limp along, but this is
11992 pretty bizarre. We use pulongest here because that's the established
11993 portability solution (e.g, we cannot use %u for uint32_t). */
11994 error (_("Dwarf Error: DWP file CU version %s doesn't match"
11995 " TU version %s [in DWP file %s]"),
11996 pulongest (dwp_file
->cus
->version
),
11997 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12001 dwp_file
->version
= dwp_file
->cus
->version
;
12002 else if (dwp_file
->tus
)
12003 dwp_file
->version
= dwp_file
->tus
->version
;
12005 dwp_file
->version
= 2;
12007 if (dwp_file
->version
== 2)
12008 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
12011 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
12012 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
12014 if (dwarf_read_debug
)
12016 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12017 fprintf_unfiltered (gdb_stdlog
,
12018 " %s CUs, %s TUs\n",
12019 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12020 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12026 /* Wrapper around open_and_init_dwp_file, only open it once. */
12028 static struct dwp_file
*
12029 get_dwp_file (void)
12031 if (! dwarf2_per_objfile
->dwp_checked
)
12033 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
12034 dwarf2_per_objfile
->dwp_checked
= 1;
12036 return dwarf2_per_objfile
->dwp_file
;
12039 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12040 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12041 or in the DWP file for the objfile, referenced by THIS_UNIT.
12042 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12043 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12045 This is called, for example, when wanting to read a variable with a
12046 complex location. Therefore we don't want to do file i/o for every call.
12047 Therefore we don't want to look for a DWO file on every call.
12048 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12049 then we check if we've already seen DWO_NAME, and only THEN do we check
12052 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12053 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12055 static struct dwo_unit
*
12056 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
12057 const char *dwo_name
, const char *comp_dir
,
12058 ULONGEST signature
, int is_debug_types
)
12060 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12061 const char *kind
= is_debug_types
? "TU" : "CU";
12062 void **dwo_file_slot
;
12063 struct dwo_file
*dwo_file
;
12064 struct dwp_file
*dwp_file
;
12066 /* First see if there's a DWP file.
12067 If we have a DWP file but didn't find the DWO inside it, don't
12068 look for the original DWO file. It makes gdb behave differently
12069 depending on whether one is debugging in the build tree. */
12071 dwp_file
= get_dwp_file ();
12072 if (dwp_file
!= NULL
)
12074 const struct dwp_hash_table
*dwp_htab
=
12075 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12077 if (dwp_htab
!= NULL
)
12079 struct dwo_unit
*dwo_cutu
=
12080 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
12081 signature
, is_debug_types
);
12083 if (dwo_cutu
!= NULL
)
12085 if (dwarf_read_debug
)
12087 fprintf_unfiltered (gdb_stdlog
,
12088 "Virtual DWO %s %s found: @%s\n",
12089 kind
, hex_string (signature
),
12090 host_address_to_string (dwo_cutu
));
12098 /* No DWP file, look for the DWO file. */
12100 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
12101 if (*dwo_file_slot
== NULL
)
12103 /* Read in the file and build a table of the CUs/TUs it contains. */
12104 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
12106 /* NOTE: This will be NULL if unable to open the file. */
12107 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12109 if (dwo_file
!= NULL
)
12111 struct dwo_unit
*dwo_cutu
= NULL
;
12113 if (is_debug_types
&& dwo_file
->tus
)
12115 struct dwo_unit find_dwo_cutu
;
12117 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12118 find_dwo_cutu
.signature
= signature
;
12120 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
12122 else if (!is_debug_types
&& dwo_file
->cus
)
12124 struct dwo_unit find_dwo_cutu
;
12126 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12127 find_dwo_cutu
.signature
= signature
;
12128 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
12132 if (dwo_cutu
!= NULL
)
12134 if (dwarf_read_debug
)
12136 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
12137 kind
, dwo_name
, hex_string (signature
),
12138 host_address_to_string (dwo_cutu
));
12145 /* We didn't find it. This could mean a dwo_id mismatch, or
12146 someone deleted the DWO/DWP file, or the search path isn't set up
12147 correctly to find the file. */
12149 if (dwarf_read_debug
)
12151 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
12152 kind
, dwo_name
, hex_string (signature
));
12155 /* This is a warning and not a complaint because it can be caused by
12156 pilot error (e.g., user accidentally deleting the DWO). */
12158 /* Print the name of the DWP file if we looked there, helps the user
12159 better diagnose the problem. */
12160 std::string dwp_text
;
12162 if (dwp_file
!= NULL
)
12163 dwp_text
= string_printf (" [in DWP file %s]",
12164 lbasename (dwp_file
->name
));
12166 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
12167 " [in module %s]"),
12168 kind
, dwo_name
, hex_string (signature
),
12170 this_unit
->is_debug_types
? "TU" : "CU",
12171 to_underlying (this_unit
->sect_off
), objfile_name (objfile
));
12176 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
12177 See lookup_dwo_cutu_unit for details. */
12179 static struct dwo_unit
*
12180 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
12181 const char *dwo_name
, const char *comp_dir
,
12182 ULONGEST signature
)
12184 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
12187 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
12188 See lookup_dwo_cutu_unit for details. */
12190 static struct dwo_unit
*
12191 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
12192 const char *dwo_name
, const char *comp_dir
)
12194 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
12197 /* Traversal function for queue_and_load_all_dwo_tus. */
12200 queue_and_load_dwo_tu (void **slot
, void *info
)
12202 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
12203 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
12204 ULONGEST signature
= dwo_unit
->signature
;
12205 struct signatured_type
*sig_type
=
12206 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
12208 if (sig_type
!= NULL
)
12210 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
12212 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
12213 a real dependency of PER_CU on SIG_TYPE. That is detected later
12214 while processing PER_CU. */
12215 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
12216 load_full_type_unit (sig_cu
);
12217 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
12223 /* Queue all TUs contained in the DWO of PER_CU to be read in.
12224 The DWO may have the only definition of the type, though it may not be
12225 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
12226 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
12229 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
12231 struct dwo_unit
*dwo_unit
;
12232 struct dwo_file
*dwo_file
;
12234 gdb_assert (!per_cu
->is_debug_types
);
12235 gdb_assert (get_dwp_file () == NULL
);
12236 gdb_assert (per_cu
->cu
!= NULL
);
12238 dwo_unit
= per_cu
->cu
->dwo_unit
;
12239 gdb_assert (dwo_unit
!= NULL
);
12241 dwo_file
= dwo_unit
->dwo_file
;
12242 if (dwo_file
->tus
!= NULL
)
12243 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
12246 /* Free all resources associated with DWO_FILE.
12247 Close the DWO file and munmap the sections.
12248 All memory should be on the objfile obstack. */
12251 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
12254 /* Note: dbfd is NULL for virtual DWO files. */
12255 gdb_bfd_unref (dwo_file
->dbfd
);
12257 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
12260 /* Wrapper for free_dwo_file for use in cleanups. */
12263 free_dwo_file_cleanup (void *arg
)
12265 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
12266 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12268 free_dwo_file (dwo_file
, objfile
);
12271 /* Traversal function for free_dwo_files. */
12274 free_dwo_file_from_slot (void **slot
, void *info
)
12276 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
12277 struct objfile
*objfile
= (struct objfile
*) info
;
12279 free_dwo_file (dwo_file
, objfile
);
12284 /* Free all resources associated with DWO_FILES. */
12287 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
12289 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
12292 /* Read in various DIEs. */
12294 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
12295 Inherit only the children of the DW_AT_abstract_origin DIE not being
12296 already referenced by DW_AT_abstract_origin from the children of the
12300 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
12302 struct die_info
*child_die
;
12303 sect_offset
*offsetp
;
12304 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
12305 struct die_info
*origin_die
;
12306 /* Iterator of the ORIGIN_DIE children. */
12307 struct die_info
*origin_child_die
;
12308 struct attribute
*attr
;
12309 struct dwarf2_cu
*origin_cu
;
12310 struct pending
**origin_previous_list_in_scope
;
12312 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12316 /* Note that following die references may follow to a die in a
12320 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
12322 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
12324 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
12325 origin_cu
->list_in_scope
= cu
->list_in_scope
;
12327 if (die
->tag
!= origin_die
->tag
12328 && !(die
->tag
== DW_TAG_inlined_subroutine
12329 && origin_die
->tag
== DW_TAG_subprogram
))
12330 complaint (&symfile_complaints
,
12331 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
12332 to_underlying (die
->sect_off
),
12333 to_underlying (origin_die
->sect_off
));
12335 std::vector
<sect_offset
> offsets
;
12337 for (child_die
= die
->child
;
12338 child_die
&& child_die
->tag
;
12339 child_die
= sibling_die (child_die
))
12341 struct die_info
*child_origin_die
;
12342 struct dwarf2_cu
*child_origin_cu
;
12344 /* We are trying to process concrete instance entries:
12345 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
12346 it's not relevant to our analysis here. i.e. detecting DIEs that are
12347 present in the abstract instance but not referenced in the concrete
12349 if (child_die
->tag
== DW_TAG_call_site
12350 || child_die
->tag
== DW_TAG_GNU_call_site
)
12353 /* For each CHILD_DIE, find the corresponding child of
12354 ORIGIN_DIE. If there is more than one layer of
12355 DW_AT_abstract_origin, follow them all; there shouldn't be,
12356 but GCC versions at least through 4.4 generate this (GCC PR
12358 child_origin_die
= child_die
;
12359 child_origin_cu
= cu
;
12362 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
12366 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
12370 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
12371 counterpart may exist. */
12372 if (child_origin_die
!= child_die
)
12374 if (child_die
->tag
!= child_origin_die
->tag
12375 && !(child_die
->tag
== DW_TAG_inlined_subroutine
12376 && child_origin_die
->tag
== DW_TAG_subprogram
))
12377 complaint (&symfile_complaints
,
12378 _("Child DIE 0x%x and its abstract origin 0x%x have "
12380 to_underlying (child_die
->sect_off
),
12381 to_underlying (child_origin_die
->sect_off
));
12382 if (child_origin_die
->parent
!= origin_die
)
12383 complaint (&symfile_complaints
,
12384 _("Child DIE 0x%x and its abstract origin 0x%x have "
12385 "different parents"),
12386 to_underlying (child_die
->sect_off
),
12387 to_underlying (child_origin_die
->sect_off
));
12389 offsets
.push_back (child_origin_die
->sect_off
);
12392 std::sort (offsets
.begin (), offsets
.end ());
12393 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
12394 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
12395 if (offsetp
[-1] == *offsetp
)
12396 complaint (&symfile_complaints
,
12397 _("Multiple children of DIE 0x%x refer "
12398 "to DIE 0x%x as their abstract origin"),
12399 to_underlying (die
->sect_off
), to_underlying (*offsetp
));
12401 offsetp
= offsets
.data ();
12402 origin_child_die
= origin_die
->child
;
12403 while (origin_child_die
&& origin_child_die
->tag
)
12405 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
12406 while (offsetp
< offsets_end
12407 && *offsetp
< origin_child_die
->sect_off
)
12409 if (offsetp
>= offsets_end
12410 || *offsetp
> origin_child_die
->sect_off
)
12412 /* Found that ORIGIN_CHILD_DIE is really not referenced.
12413 Check whether we're already processing ORIGIN_CHILD_DIE.
12414 This can happen with mutually referenced abstract_origins.
12416 if (!origin_child_die
->in_process
)
12417 process_die (origin_child_die
, origin_cu
);
12419 origin_child_die
= sibling_die (origin_child_die
);
12421 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
12425 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12427 struct objfile
*objfile
= cu
->objfile
;
12428 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12429 struct context_stack
*newobj
;
12432 struct die_info
*child_die
;
12433 struct attribute
*attr
, *call_line
, *call_file
;
12435 CORE_ADDR baseaddr
;
12436 struct block
*block
;
12437 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
12438 std::vector
<struct symbol
*> template_args
;
12439 struct template_symbol
*templ_func
= NULL
;
12443 /* If we do not have call site information, we can't show the
12444 caller of this inlined function. That's too confusing, so
12445 only use the scope for local variables. */
12446 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
12447 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
12448 if (call_line
== NULL
|| call_file
== NULL
)
12450 read_lexical_block_scope (die
, cu
);
12455 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12457 name
= dwarf2_name (die
, cu
);
12459 /* Ignore functions with missing or empty names. These are actually
12460 illegal according to the DWARF standard. */
12463 complaint (&symfile_complaints
,
12464 _("missing name for subprogram DIE at %d"),
12465 to_underlying (die
->sect_off
));
12469 /* Ignore functions with missing or invalid low and high pc attributes. */
12470 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
12471 <= PC_BOUNDS_INVALID
)
12473 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
12474 if (!attr
|| !DW_UNSND (attr
))
12475 complaint (&symfile_complaints
,
12476 _("cannot get low and high bounds "
12477 "for subprogram DIE at %d"),
12478 to_underlying (die
->sect_off
));
12482 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12483 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
12485 /* If we have any template arguments, then we must allocate a
12486 different sort of symbol. */
12487 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
12489 if (child_die
->tag
== DW_TAG_template_type_param
12490 || child_die
->tag
== DW_TAG_template_value_param
)
12492 templ_func
= allocate_template_symbol (objfile
);
12493 templ_func
->subclass
= SYMBOL_TEMPLATE
;
12498 newobj
= push_context (0, lowpc
);
12499 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
12500 (struct symbol
*) templ_func
);
12502 /* If there is a location expression for DW_AT_frame_base, record
12504 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
12506 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
12508 /* If there is a location for the static link, record it. */
12509 newobj
->static_link
= NULL
;
12510 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
12513 newobj
->static_link
12514 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
12515 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
12518 cu
->list_in_scope
= &local_symbols
;
12520 if (die
->child
!= NULL
)
12522 child_die
= die
->child
;
12523 while (child_die
&& child_die
->tag
)
12525 if (child_die
->tag
== DW_TAG_template_type_param
12526 || child_die
->tag
== DW_TAG_template_value_param
)
12528 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
12531 template_args
.push_back (arg
);
12534 process_die (child_die
, cu
);
12535 child_die
= sibling_die (child_die
);
12539 inherit_abstract_dies (die
, cu
);
12541 /* If we have a DW_AT_specification, we might need to import using
12542 directives from the context of the specification DIE. See the
12543 comment in determine_prefix. */
12544 if (cu
->language
== language_cplus
12545 && dwarf2_attr (die
, DW_AT_specification
, cu
))
12547 struct dwarf2_cu
*spec_cu
= cu
;
12548 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
12552 child_die
= spec_die
->child
;
12553 while (child_die
&& child_die
->tag
)
12555 if (child_die
->tag
== DW_TAG_imported_module
)
12556 process_die (child_die
, spec_cu
);
12557 child_die
= sibling_die (child_die
);
12560 /* In some cases, GCC generates specification DIEs that
12561 themselves contain DW_AT_specification attributes. */
12562 spec_die
= die_specification (spec_die
, &spec_cu
);
12566 newobj
= pop_context ();
12567 /* Make a block for the local symbols within. */
12568 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
12569 newobj
->static_link
, lowpc
, highpc
);
12571 /* For C++, set the block's scope. */
12572 if ((cu
->language
== language_cplus
12573 || cu
->language
== language_fortran
12574 || cu
->language
== language_d
12575 || cu
->language
== language_rust
)
12576 && cu
->processing_has_namespace_info
)
12577 block_set_scope (block
, determine_prefix (die
, cu
),
12578 &objfile
->objfile_obstack
);
12580 /* If we have address ranges, record them. */
12581 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
12583 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
12585 /* Attach template arguments to function. */
12586 if (!template_args
.empty ())
12588 gdb_assert (templ_func
!= NULL
);
12590 templ_func
->n_template_arguments
= template_args
.size ();
12591 templ_func
->template_arguments
12592 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
12593 templ_func
->n_template_arguments
);
12594 memcpy (templ_func
->template_arguments
,
12595 template_args
.data (),
12596 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
12599 /* In C++, we can have functions nested inside functions (e.g., when
12600 a function declares a class that has methods). This means that
12601 when we finish processing a function scope, we may need to go
12602 back to building a containing block's symbol lists. */
12603 local_symbols
= newobj
->locals
;
12604 local_using_directives
= newobj
->local_using_directives
;
12606 /* If we've finished processing a top-level function, subsequent
12607 symbols go in the file symbol list. */
12608 if (outermost_context_p ())
12609 cu
->list_in_scope
= &file_symbols
;
12612 /* Process all the DIES contained within a lexical block scope. Start
12613 a new scope, process the dies, and then close the scope. */
12616 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12618 struct objfile
*objfile
= cu
->objfile
;
12619 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12620 struct context_stack
*newobj
;
12621 CORE_ADDR lowpc
, highpc
;
12622 struct die_info
*child_die
;
12623 CORE_ADDR baseaddr
;
12625 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12627 /* Ignore blocks with missing or invalid low and high pc attributes. */
12628 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
12629 as multiple lexical blocks? Handling children in a sane way would
12630 be nasty. Might be easier to properly extend generic blocks to
12631 describe ranges. */
12632 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
12634 case PC_BOUNDS_NOT_PRESENT
:
12635 /* DW_TAG_lexical_block has no attributes, process its children as if
12636 there was no wrapping by that DW_TAG_lexical_block.
12637 GCC does no longer produces such DWARF since GCC r224161. */
12638 for (child_die
= die
->child
;
12639 child_die
!= NULL
&& child_die
->tag
;
12640 child_die
= sibling_die (child_die
))
12641 process_die (child_die
, cu
);
12643 case PC_BOUNDS_INVALID
:
12646 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12647 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
12649 push_context (0, lowpc
);
12650 if (die
->child
!= NULL
)
12652 child_die
= die
->child
;
12653 while (child_die
&& child_die
->tag
)
12655 process_die (child_die
, cu
);
12656 child_die
= sibling_die (child_die
);
12659 inherit_abstract_dies (die
, cu
);
12660 newobj
= pop_context ();
12662 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
12664 struct block
*block
12665 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
12666 newobj
->start_addr
, highpc
);
12668 /* Note that recording ranges after traversing children, as we
12669 do here, means that recording a parent's ranges entails
12670 walking across all its children's ranges as they appear in
12671 the address map, which is quadratic behavior.
12673 It would be nicer to record the parent's ranges before
12674 traversing its children, simply overriding whatever you find
12675 there. But since we don't even decide whether to create a
12676 block until after we've traversed its children, that's hard
12678 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
12680 local_symbols
= newobj
->locals
;
12681 local_using_directives
= newobj
->local_using_directives
;
12684 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
12687 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12689 struct objfile
*objfile
= cu
->objfile
;
12690 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12691 CORE_ADDR pc
, baseaddr
;
12692 struct attribute
*attr
;
12693 struct call_site
*call_site
, call_site_local
;
12696 struct die_info
*child_die
;
12698 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12700 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
12703 /* This was a pre-DWARF-5 GNU extension alias
12704 for DW_AT_call_return_pc. */
12705 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12709 complaint (&symfile_complaints
,
12710 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
12711 "DIE 0x%x [in module %s]"),
12712 to_underlying (die
->sect_off
), objfile_name (objfile
));
12715 pc
= attr_value_as_address (attr
) + baseaddr
;
12716 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
12718 if (cu
->call_site_htab
== NULL
)
12719 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
12720 NULL
, &objfile
->objfile_obstack
,
12721 hashtab_obstack_allocate
, NULL
);
12722 call_site_local
.pc
= pc
;
12723 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
12726 complaint (&symfile_complaints
,
12727 _("Duplicate PC %s for DW_TAG_call_site "
12728 "DIE 0x%x [in module %s]"),
12729 paddress (gdbarch
, pc
), to_underlying (die
->sect_off
),
12730 objfile_name (objfile
));
12734 /* Count parameters at the caller. */
12737 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
12738 child_die
= sibling_die (child_die
))
12740 if (child_die
->tag
!= DW_TAG_call_site_parameter
12741 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
12743 complaint (&symfile_complaints
,
12744 _("Tag %d is not DW_TAG_call_site_parameter in "
12745 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12746 child_die
->tag
, to_underlying (child_die
->sect_off
),
12747 objfile_name (objfile
));
12755 = ((struct call_site
*)
12756 obstack_alloc (&objfile
->objfile_obstack
,
12757 sizeof (*call_site
)
12758 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
12760 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
12761 call_site
->pc
= pc
;
12763 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
12764 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
12766 struct die_info
*func_die
;
12768 /* Skip also over DW_TAG_inlined_subroutine. */
12769 for (func_die
= die
->parent
;
12770 func_die
&& func_die
->tag
!= DW_TAG_subprogram
12771 && func_die
->tag
!= DW_TAG_subroutine_type
;
12772 func_die
= func_die
->parent
);
12774 /* DW_AT_call_all_calls is a superset
12775 of DW_AT_call_all_tail_calls. */
12777 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
12778 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
12779 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
12780 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
12782 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
12783 not complete. But keep CALL_SITE for look ups via call_site_htab,
12784 both the initial caller containing the real return address PC and
12785 the final callee containing the current PC of a chain of tail
12786 calls do not need to have the tail call list complete. But any
12787 function candidate for a virtual tail call frame searched via
12788 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
12789 determined unambiguously. */
12793 struct type
*func_type
= NULL
;
12796 func_type
= get_die_type (func_die
, cu
);
12797 if (func_type
!= NULL
)
12799 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
12801 /* Enlist this call site to the function. */
12802 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
12803 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
12806 complaint (&symfile_complaints
,
12807 _("Cannot find function owning DW_TAG_call_site "
12808 "DIE 0x%x [in module %s]"),
12809 to_underlying (die
->sect_off
), objfile_name (objfile
));
12813 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
12815 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
12817 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
12820 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
12821 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12823 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
12824 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
12825 /* Keep NULL DWARF_BLOCK. */;
12826 else if (attr_form_is_block (attr
))
12828 struct dwarf2_locexpr_baton
*dlbaton
;
12830 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
12831 dlbaton
->data
= DW_BLOCK (attr
)->data
;
12832 dlbaton
->size
= DW_BLOCK (attr
)->size
;
12833 dlbaton
->per_cu
= cu
->per_cu
;
12835 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
12837 else if (attr_form_is_ref (attr
))
12839 struct dwarf2_cu
*target_cu
= cu
;
12840 struct die_info
*target_die
;
12842 target_die
= follow_die_ref (die
, attr
, &target_cu
);
12843 gdb_assert (target_cu
->objfile
== objfile
);
12844 if (die_is_declaration (target_die
, target_cu
))
12846 const char *target_physname
;
12848 /* Prefer the mangled name; otherwise compute the demangled one. */
12849 target_physname
= dw2_linkage_name (target_die
, target_cu
);
12850 if (target_physname
== NULL
)
12851 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
12852 if (target_physname
== NULL
)
12853 complaint (&symfile_complaints
,
12854 _("DW_AT_call_target target DIE has invalid "
12855 "physname, for referencing DIE 0x%x [in module %s]"),
12856 to_underlying (die
->sect_off
), objfile_name (objfile
));
12858 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
12864 /* DW_AT_entry_pc should be preferred. */
12865 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
12866 <= PC_BOUNDS_INVALID
)
12867 complaint (&symfile_complaints
,
12868 _("DW_AT_call_target target DIE has invalid "
12869 "low pc, for referencing DIE 0x%x [in module %s]"),
12870 to_underlying (die
->sect_off
), objfile_name (objfile
));
12873 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12874 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
12879 complaint (&symfile_complaints
,
12880 _("DW_TAG_call_site DW_AT_call_target is neither "
12881 "block nor reference, for DIE 0x%x [in module %s]"),
12882 to_underlying (die
->sect_off
), objfile_name (objfile
));
12884 call_site
->per_cu
= cu
->per_cu
;
12886 for (child_die
= die
->child
;
12887 child_die
&& child_die
->tag
;
12888 child_die
= sibling_die (child_die
))
12890 struct call_site_parameter
*parameter
;
12891 struct attribute
*loc
, *origin
;
12893 if (child_die
->tag
!= DW_TAG_call_site_parameter
12894 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
12896 /* Already printed the complaint above. */
12900 gdb_assert (call_site
->parameter_count
< nparams
);
12901 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
12903 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
12904 specifies DW_TAG_formal_parameter. Value of the data assumed for the
12905 register is contained in DW_AT_call_value. */
12907 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
12908 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
12909 if (origin
== NULL
)
12911 /* This was a pre-DWARF-5 GNU extension alias
12912 for DW_AT_call_parameter. */
12913 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
12915 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
12917 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
12919 sect_offset sect_off
12920 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
12921 if (!offset_in_cu_p (&cu
->header
, sect_off
))
12923 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
12924 binding can be done only inside one CU. Such referenced DIE
12925 therefore cannot be even moved to DW_TAG_partial_unit. */
12926 complaint (&symfile_complaints
,
12927 _("DW_AT_call_parameter offset is not in CU for "
12928 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12929 to_underlying (child_die
->sect_off
),
12930 objfile_name (objfile
));
12933 parameter
->u
.param_cu_off
12934 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
12936 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
12938 complaint (&symfile_complaints
,
12939 _("No DW_FORM_block* DW_AT_location for "
12940 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12941 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
12946 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
12947 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
12948 if (parameter
->u
.dwarf_reg
!= -1)
12949 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
12950 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
12951 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
12952 ¶meter
->u
.fb_offset
))
12953 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
12956 complaint (&symfile_complaints
,
12957 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
12958 "for DW_FORM_block* DW_AT_location is supported for "
12959 "DW_TAG_call_site child DIE 0x%x "
12961 to_underlying (child_die
->sect_off
),
12962 objfile_name (objfile
));
12967 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
12969 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
12970 if (!attr_form_is_block (attr
))
12972 complaint (&symfile_complaints
,
12973 _("No DW_FORM_block* DW_AT_call_value for "
12974 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12975 to_underlying (child_die
->sect_off
),
12976 objfile_name (objfile
));
12979 parameter
->value
= DW_BLOCK (attr
)->data
;
12980 parameter
->value_size
= DW_BLOCK (attr
)->size
;
12982 /* Parameters are not pre-cleared by memset above. */
12983 parameter
->data_value
= NULL
;
12984 parameter
->data_value_size
= 0;
12985 call_site
->parameter_count
++;
12987 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
12989 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
12992 if (!attr_form_is_block (attr
))
12993 complaint (&symfile_complaints
,
12994 _("No DW_FORM_block* DW_AT_call_data_value for "
12995 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12996 to_underlying (child_die
->sect_off
),
12997 objfile_name (objfile
));
13000 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13001 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13007 /* Helper function for read_variable. If DIE represents a virtual
13008 table, then return the type of the concrete object that is
13009 associated with the virtual table. Otherwise, return NULL. */
13011 static struct type
*
13012 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13014 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13018 /* Find the type DIE. */
13019 struct die_info
*type_die
= NULL
;
13020 struct dwarf2_cu
*type_cu
= cu
;
13022 if (attr_form_is_ref (attr
))
13023 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13024 if (type_die
== NULL
)
13027 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13029 return die_containing_type (type_die
, type_cu
);
13032 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13035 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13037 struct rust_vtable_symbol
*storage
= NULL
;
13039 if (cu
->language
== language_rust
)
13041 struct type
*containing_type
= rust_containing_type (die
, cu
);
13043 if (containing_type
!= NULL
)
13045 struct objfile
*objfile
= cu
->objfile
;
13047 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
13048 struct rust_vtable_symbol
);
13049 initialize_objfile_symbol (storage
);
13050 storage
->concrete_type
= containing_type
;
13051 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13055 new_symbol_full (die
, NULL
, cu
, storage
);
13058 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13059 reading .debug_rnglists.
13060 Callback's type should be:
13061 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13062 Return true if the attributes are present and valid, otherwise,
13065 template <typename Callback
>
13067 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13068 Callback
&&callback
)
13070 struct objfile
*objfile
= cu
->objfile
;
13071 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13072 struct comp_unit_head
*cu_header
= &cu
->header
;
13073 bfd
*obfd
= objfile
->obfd
;
13074 unsigned int addr_size
= cu_header
->addr_size
;
13075 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13076 /* Base address selection entry. */
13079 unsigned int dummy
;
13080 const gdb_byte
*buffer
;
13082 CORE_ADDR high
= 0;
13083 CORE_ADDR baseaddr
;
13084 bool overflow
= false;
13086 found_base
= cu
->base_known
;
13087 base
= cu
->base_address
;
13089 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
13090 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
13092 complaint (&symfile_complaints
,
13093 _("Offset %d out of bounds for DW_AT_ranges attribute"),
13097 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
13099 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13103 /* Initialize it due to a false compiler warning. */
13104 CORE_ADDR range_beginning
= 0, range_end
= 0;
13105 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
13106 + dwarf2_per_objfile
->rnglists
.size
);
13107 unsigned int bytes_read
;
13109 if (buffer
== buf_end
)
13114 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13117 case DW_RLE_end_of_list
:
13119 case DW_RLE_base_address
:
13120 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13125 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13127 buffer
+= bytes_read
;
13129 case DW_RLE_start_length
:
13130 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13135 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13136 buffer
+= bytes_read
;
13137 range_end
= (range_beginning
13138 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13139 buffer
+= bytes_read
;
13140 if (buffer
> buf_end
)
13146 case DW_RLE_offset_pair
:
13147 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13148 buffer
+= bytes_read
;
13149 if (buffer
> buf_end
)
13154 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13155 buffer
+= bytes_read
;
13156 if (buffer
> buf_end
)
13162 case DW_RLE_start_end
:
13163 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13168 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13169 buffer
+= bytes_read
;
13170 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13171 buffer
+= bytes_read
;
13174 complaint (&symfile_complaints
,
13175 _("Invalid .debug_rnglists data (no base address)"));
13178 if (rlet
== DW_RLE_end_of_list
|| overflow
)
13180 if (rlet
== DW_RLE_base_address
)
13185 /* We have no valid base address for the ranges
13187 complaint (&symfile_complaints
,
13188 _("Invalid .debug_rnglists data (no base address)"));
13192 if (range_beginning
> range_end
)
13194 /* Inverted range entries are invalid. */
13195 complaint (&symfile_complaints
,
13196 _("Invalid .debug_rnglists data (inverted range)"));
13200 /* Empty range entries have no effect. */
13201 if (range_beginning
== range_end
)
13204 range_beginning
+= base
;
13207 /* A not-uncommon case of bad debug info.
13208 Don't pollute the addrmap with bad data. */
13209 if (range_beginning
+ baseaddr
== 0
13210 && !dwarf2_per_objfile
->has_section_at_zero
)
13212 complaint (&symfile_complaints
,
13213 _(".debug_rnglists entry has start address of zero"
13214 " [in module %s]"), objfile_name (objfile
));
13218 callback (range_beginning
, range_end
);
13223 complaint (&symfile_complaints
,
13224 _("Offset %d is not terminated "
13225 "for DW_AT_ranges attribute"),
13233 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
13234 Callback's type should be:
13235 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13236 Return 1 if the attributes are present and valid, otherwise, return 0. */
13238 template <typename Callback
>
13240 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
13241 Callback
&&callback
)
13243 struct objfile
*objfile
= cu
->objfile
;
13244 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13245 struct comp_unit_head
*cu_header
= &cu
->header
;
13246 bfd
*obfd
= objfile
->obfd
;
13247 unsigned int addr_size
= cu_header
->addr_size
;
13248 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13249 /* Base address selection entry. */
13252 unsigned int dummy
;
13253 const gdb_byte
*buffer
;
13254 CORE_ADDR baseaddr
;
13256 if (cu_header
->version
>= 5)
13257 return dwarf2_rnglists_process (offset
, cu
, callback
);
13259 found_base
= cu
->base_known
;
13260 base
= cu
->base_address
;
13262 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
13263 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
13265 complaint (&symfile_complaints
,
13266 _("Offset %d out of bounds for DW_AT_ranges attribute"),
13270 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
13272 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13276 CORE_ADDR range_beginning
, range_end
;
13278 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
13279 buffer
+= addr_size
;
13280 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
13281 buffer
+= addr_size
;
13282 offset
+= 2 * addr_size
;
13284 /* An end of list marker is a pair of zero addresses. */
13285 if (range_beginning
== 0 && range_end
== 0)
13286 /* Found the end of list entry. */
13289 /* Each base address selection entry is a pair of 2 values.
13290 The first is the largest possible address, the second is
13291 the base address. Check for a base address here. */
13292 if ((range_beginning
& mask
) == mask
)
13294 /* If we found the largest possible address, then we already
13295 have the base address in range_end. */
13303 /* We have no valid base address for the ranges
13305 complaint (&symfile_complaints
,
13306 _("Invalid .debug_ranges data (no base address)"));
13310 if (range_beginning
> range_end
)
13312 /* Inverted range entries are invalid. */
13313 complaint (&symfile_complaints
,
13314 _("Invalid .debug_ranges data (inverted range)"));
13318 /* Empty range entries have no effect. */
13319 if (range_beginning
== range_end
)
13322 range_beginning
+= base
;
13325 /* A not-uncommon case of bad debug info.
13326 Don't pollute the addrmap with bad data. */
13327 if (range_beginning
+ baseaddr
== 0
13328 && !dwarf2_per_objfile
->has_section_at_zero
)
13330 complaint (&symfile_complaints
,
13331 _(".debug_ranges entry has start address of zero"
13332 " [in module %s]"), objfile_name (objfile
));
13336 callback (range_beginning
, range_end
);
13342 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
13343 Return 1 if the attributes are present and valid, otherwise, return 0.
13344 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
13347 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
13348 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
13349 struct partial_symtab
*ranges_pst
)
13351 struct objfile
*objfile
= cu
->objfile
;
13352 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13353 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
13354 SECT_OFF_TEXT (objfile
));
13357 CORE_ADDR high
= 0;
13360 retval
= dwarf2_ranges_process (offset
, cu
,
13361 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
13363 if (ranges_pst
!= NULL
)
13368 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
13369 range_beginning
+ baseaddr
);
13370 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
13371 range_end
+ baseaddr
);
13372 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
13376 /* FIXME: This is recording everything as a low-high
13377 segment of consecutive addresses. We should have a
13378 data structure for discontiguous block ranges
13382 low
= range_beginning
;
13388 if (range_beginning
< low
)
13389 low
= range_beginning
;
13390 if (range_end
> high
)
13398 /* If the first entry is an end-of-list marker, the range
13399 describes an empty scope, i.e. no instructions. */
13405 *high_return
= high
;
13409 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
13410 definition for the return value. *LOWPC and *HIGHPC are set iff
13411 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
13413 static enum pc_bounds_kind
13414 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
13415 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
13416 struct partial_symtab
*pst
)
13418 struct attribute
*attr
;
13419 struct attribute
*attr_high
;
13421 CORE_ADDR high
= 0;
13422 enum pc_bounds_kind ret
;
13424 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
13427 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13430 low
= attr_value_as_address (attr
);
13431 high
= attr_value_as_address (attr_high
);
13432 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
13436 /* Found high w/o low attribute. */
13437 return PC_BOUNDS_INVALID
;
13439 /* Found consecutive range of addresses. */
13440 ret
= PC_BOUNDS_HIGH_LOW
;
13444 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
13447 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
13448 We take advantage of the fact that DW_AT_ranges does not appear
13449 in DW_TAG_compile_unit of DWO files. */
13450 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
13451 unsigned int ranges_offset
= (DW_UNSND (attr
)
13452 + (need_ranges_base
13456 /* Value of the DW_AT_ranges attribute is the offset in the
13457 .debug_ranges section. */
13458 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
13459 return PC_BOUNDS_INVALID
;
13460 /* Found discontinuous range of addresses. */
13461 ret
= PC_BOUNDS_RANGES
;
13464 return PC_BOUNDS_NOT_PRESENT
;
13467 /* read_partial_die has also the strict LOW < HIGH requirement. */
13469 return PC_BOUNDS_INVALID
;
13471 /* When using the GNU linker, .gnu.linkonce. sections are used to
13472 eliminate duplicate copies of functions and vtables and such.
13473 The linker will arbitrarily choose one and discard the others.
13474 The AT_*_pc values for such functions refer to local labels in
13475 these sections. If the section from that file was discarded, the
13476 labels are not in the output, so the relocs get a value of 0.
13477 If this is a discarded function, mark the pc bounds as invalid,
13478 so that GDB will ignore it. */
13479 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13480 return PC_BOUNDS_INVALID
;
13488 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
13489 its low and high PC addresses. Do nothing if these addresses could not
13490 be determined. Otherwise, set LOWPC to the low address if it is smaller,
13491 and HIGHPC to the high address if greater than HIGHPC. */
13494 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
13495 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13496 struct dwarf2_cu
*cu
)
13498 CORE_ADDR low
, high
;
13499 struct die_info
*child
= die
->child
;
13501 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
13503 *lowpc
= std::min (*lowpc
, low
);
13504 *highpc
= std::max (*highpc
, high
);
13507 /* If the language does not allow nested subprograms (either inside
13508 subprograms or lexical blocks), we're done. */
13509 if (cu
->language
!= language_ada
)
13512 /* Check all the children of the given DIE. If it contains nested
13513 subprograms, then check their pc bounds. Likewise, we need to
13514 check lexical blocks as well, as they may also contain subprogram
13516 while (child
&& child
->tag
)
13518 if (child
->tag
== DW_TAG_subprogram
13519 || child
->tag
== DW_TAG_lexical_block
)
13520 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
13521 child
= sibling_die (child
);
13525 /* Get the low and high pc's represented by the scope DIE, and store
13526 them in *LOWPC and *HIGHPC. If the correct values can't be
13527 determined, set *LOWPC to -1 and *HIGHPC to 0. */
13530 get_scope_pc_bounds (struct die_info
*die
,
13531 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13532 struct dwarf2_cu
*cu
)
13534 CORE_ADDR best_low
= (CORE_ADDR
) -1;
13535 CORE_ADDR best_high
= (CORE_ADDR
) 0;
13536 CORE_ADDR current_low
, current_high
;
13538 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
13539 >= PC_BOUNDS_RANGES
)
13541 best_low
= current_low
;
13542 best_high
= current_high
;
13546 struct die_info
*child
= die
->child
;
13548 while (child
&& child
->tag
)
13550 switch (child
->tag
) {
13551 case DW_TAG_subprogram
:
13552 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
13554 case DW_TAG_namespace
:
13555 case DW_TAG_module
:
13556 /* FIXME: carlton/2004-01-16: Should we do this for
13557 DW_TAG_class_type/DW_TAG_structure_type, too? I think
13558 that current GCC's always emit the DIEs corresponding
13559 to definitions of methods of classes as children of a
13560 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
13561 the DIEs giving the declarations, which could be
13562 anywhere). But I don't see any reason why the
13563 standards says that they have to be there. */
13564 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
13566 if (current_low
!= ((CORE_ADDR
) -1))
13568 best_low
= std::min (best_low
, current_low
);
13569 best_high
= std::max (best_high
, current_high
);
13577 child
= sibling_die (child
);
13582 *highpc
= best_high
;
13585 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
13589 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
13590 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
13592 struct objfile
*objfile
= cu
->objfile
;
13593 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13594 struct attribute
*attr
;
13595 struct attribute
*attr_high
;
13597 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
13600 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13603 CORE_ADDR low
= attr_value_as_address (attr
);
13604 CORE_ADDR high
= attr_value_as_address (attr_high
);
13606 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
13609 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
13610 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
13611 record_block_range (block
, low
, high
- 1);
13615 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
13618 bfd
*obfd
= objfile
->obfd
;
13619 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
13620 We take advantage of the fact that DW_AT_ranges does not appear
13621 in DW_TAG_compile_unit of DWO files. */
13622 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
13624 /* The value of the DW_AT_ranges attribute is the offset of the
13625 address range list in the .debug_ranges section. */
13626 unsigned long offset
= (DW_UNSND (attr
)
13627 + (need_ranges_base
? cu
->ranges_base
: 0));
13628 const gdb_byte
*buffer
;
13630 /* For some target architectures, but not others, the
13631 read_address function sign-extends the addresses it returns.
13632 To recognize base address selection entries, we need a
13634 unsigned int addr_size
= cu
->header
.addr_size
;
13635 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13637 /* The base address, to which the next pair is relative. Note
13638 that this 'base' is a DWARF concept: most entries in a range
13639 list are relative, to reduce the number of relocs against the
13640 debugging information. This is separate from this function's
13641 'baseaddr' argument, which GDB uses to relocate debugging
13642 information from a shared library based on the address at
13643 which the library was loaded. */
13644 CORE_ADDR base
= cu
->base_address
;
13645 int base_known
= cu
->base_known
;
13647 dwarf2_ranges_process (offset
, cu
,
13648 [&] (CORE_ADDR start
, CORE_ADDR end
)
13652 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
13653 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
13654 record_block_range (block
, start
, end
- 1);
13659 /* Check whether the producer field indicates either of GCC < 4.6, or the
13660 Intel C/C++ compiler, and cache the result in CU. */
13663 check_producer (struct dwarf2_cu
*cu
)
13667 if (cu
->producer
== NULL
)
13669 /* For unknown compilers expect their behavior is DWARF version
13672 GCC started to support .debug_types sections by -gdwarf-4 since
13673 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
13674 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
13675 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
13676 interpreted incorrectly by GDB now - GCC PR debug/48229. */
13678 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
13680 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
13681 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
13683 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
13684 cu
->producer_is_icc_lt_14
= major
< 14;
13687 /* For other non-GCC compilers, expect their behavior is DWARF version
13691 cu
->checked_producer
= 1;
13694 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
13695 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
13696 during 4.6.0 experimental. */
13699 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
13701 if (!cu
->checked_producer
)
13702 check_producer (cu
);
13704 return cu
->producer_is_gxx_lt_4_6
;
13707 /* Return the default accessibility type if it is not overriden by
13708 DW_AT_accessibility. */
13710 static enum dwarf_access_attribute
13711 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
13713 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
13715 /* The default DWARF 2 accessibility for members is public, the default
13716 accessibility for inheritance is private. */
13718 if (die
->tag
!= DW_TAG_inheritance
)
13719 return DW_ACCESS_public
;
13721 return DW_ACCESS_private
;
13725 /* DWARF 3+ defines the default accessibility a different way. The same
13726 rules apply now for DW_TAG_inheritance as for the members and it only
13727 depends on the container kind. */
13729 if (die
->parent
->tag
== DW_TAG_class_type
)
13730 return DW_ACCESS_private
;
13732 return DW_ACCESS_public
;
13736 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
13737 offset. If the attribute was not found return 0, otherwise return
13738 1. If it was found but could not properly be handled, set *OFFSET
13742 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
13745 struct attribute
*attr
;
13747 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
13752 /* Note that we do not check for a section offset first here.
13753 This is because DW_AT_data_member_location is new in DWARF 4,
13754 so if we see it, we can assume that a constant form is really
13755 a constant and not a section offset. */
13756 if (attr_form_is_constant (attr
))
13757 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
13758 else if (attr_form_is_section_offset (attr
))
13759 dwarf2_complex_location_expr_complaint ();
13760 else if (attr_form_is_block (attr
))
13761 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
13763 dwarf2_complex_location_expr_complaint ();
13771 /* Add an aggregate field to the field list. */
13774 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
13775 struct dwarf2_cu
*cu
)
13777 struct objfile
*objfile
= cu
->objfile
;
13778 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13779 struct nextfield
*new_field
;
13780 struct attribute
*attr
;
13782 const char *fieldname
= "";
13784 /* Allocate a new field list entry and link it in. */
13785 new_field
= XNEW (struct nextfield
);
13786 make_cleanup (xfree
, new_field
);
13787 memset (new_field
, 0, sizeof (struct nextfield
));
13789 if (die
->tag
== DW_TAG_inheritance
)
13791 new_field
->next
= fip
->baseclasses
;
13792 fip
->baseclasses
= new_field
;
13796 new_field
->next
= fip
->fields
;
13797 fip
->fields
= new_field
;
13801 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
13803 new_field
->accessibility
= DW_UNSND (attr
);
13805 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
13806 if (new_field
->accessibility
!= DW_ACCESS_public
)
13807 fip
->non_public_fields
= 1;
13809 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13811 new_field
->virtuality
= DW_UNSND (attr
);
13813 new_field
->virtuality
= DW_VIRTUALITY_none
;
13815 fp
= &new_field
->field
;
13817 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
13821 /* Data member other than a C++ static data member. */
13823 /* Get type of field. */
13824 fp
->type
= die_type (die
, cu
);
13826 SET_FIELD_BITPOS (*fp
, 0);
13828 /* Get bit size of field (zero if none). */
13829 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
13832 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
13836 FIELD_BITSIZE (*fp
) = 0;
13839 /* Get bit offset of field. */
13840 if (handle_data_member_location (die
, cu
, &offset
))
13841 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
13842 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
13845 if (gdbarch_bits_big_endian (gdbarch
))
13847 /* For big endian bits, the DW_AT_bit_offset gives the
13848 additional bit offset from the MSB of the containing
13849 anonymous object to the MSB of the field. We don't
13850 have to do anything special since we don't need to
13851 know the size of the anonymous object. */
13852 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
13856 /* For little endian bits, compute the bit offset to the
13857 MSB of the anonymous object, subtract off the number of
13858 bits from the MSB of the field to the MSB of the
13859 object, and then subtract off the number of bits of
13860 the field itself. The result is the bit offset of
13861 the LSB of the field. */
13862 int anonymous_size
;
13863 int bit_offset
= DW_UNSND (attr
);
13865 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13868 /* The size of the anonymous object containing
13869 the bit field is explicit, so use the
13870 indicated size (in bytes). */
13871 anonymous_size
= DW_UNSND (attr
);
13875 /* The size of the anonymous object containing
13876 the bit field must be inferred from the type
13877 attribute of the data member containing the
13879 anonymous_size
= TYPE_LENGTH (fp
->type
);
13881 SET_FIELD_BITPOS (*fp
,
13882 (FIELD_BITPOS (*fp
)
13883 + anonymous_size
* bits_per_byte
13884 - bit_offset
- FIELD_BITSIZE (*fp
)));
13887 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
13889 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
13890 + dwarf2_get_attr_constant_value (attr
, 0)));
13892 /* Get name of field. */
13893 fieldname
= dwarf2_name (die
, cu
);
13894 if (fieldname
== NULL
)
13897 /* The name is already allocated along with this objfile, so we don't
13898 need to duplicate it for the type. */
13899 fp
->name
= fieldname
;
13901 /* Change accessibility for artificial fields (e.g. virtual table
13902 pointer or virtual base class pointer) to private. */
13903 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
13905 FIELD_ARTIFICIAL (*fp
) = 1;
13906 new_field
->accessibility
= DW_ACCESS_private
;
13907 fip
->non_public_fields
= 1;
13910 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
13912 /* C++ static member. */
13914 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
13915 is a declaration, but all versions of G++ as of this writing
13916 (so through at least 3.2.1) incorrectly generate
13917 DW_TAG_variable tags. */
13919 const char *physname
;
13921 /* Get name of field. */
13922 fieldname
= dwarf2_name (die
, cu
);
13923 if (fieldname
== NULL
)
13926 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13928 /* Only create a symbol if this is an external value.
13929 new_symbol checks this and puts the value in the global symbol
13930 table, which we want. If it is not external, new_symbol
13931 will try to put the value in cu->list_in_scope which is wrong. */
13932 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
13934 /* A static const member, not much different than an enum as far as
13935 we're concerned, except that we can support more types. */
13936 new_symbol (die
, NULL
, cu
);
13939 /* Get physical name. */
13940 physname
= dwarf2_physname (fieldname
, die
, cu
);
13942 /* The name is already allocated along with this objfile, so we don't
13943 need to duplicate it for the type. */
13944 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
13945 FIELD_TYPE (*fp
) = die_type (die
, cu
);
13946 FIELD_NAME (*fp
) = fieldname
;
13948 else if (die
->tag
== DW_TAG_inheritance
)
13952 /* C++ base class field. */
13953 if (handle_data_member_location (die
, cu
, &offset
))
13954 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
13955 FIELD_BITSIZE (*fp
) = 0;
13956 FIELD_TYPE (*fp
) = die_type (die
, cu
);
13957 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
13958 fip
->nbaseclasses
++;
13962 /* Add a typedef defined in the scope of the FIP's class. */
13965 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
13966 struct dwarf2_cu
*cu
)
13968 struct typedef_field_list
*new_field
;
13969 struct typedef_field
*fp
;
13971 /* Allocate a new field list entry and link it in. */
13972 new_field
= XCNEW (struct typedef_field_list
);
13973 make_cleanup (xfree
, new_field
);
13975 gdb_assert (die
->tag
== DW_TAG_typedef
);
13977 fp
= &new_field
->field
;
13979 /* Get name of field. */
13980 fp
->name
= dwarf2_name (die
, cu
);
13981 if (fp
->name
== NULL
)
13984 fp
->type
= read_type_die (die
, cu
);
13986 /* Save accessibility. */
13987 enum dwarf_access_attribute accessibility
;
13988 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
13990 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
13992 accessibility
= dwarf2_default_access_attribute (die
, cu
);
13993 switch (accessibility
)
13995 case DW_ACCESS_public
:
13996 /* The assumed value if neither private nor protected. */
13998 case DW_ACCESS_private
:
13999 fp
->is_private
= 1;
14001 case DW_ACCESS_protected
:
14002 fp
->is_protected
= 1;
14005 complaint (&symfile_complaints
,
14006 _("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14009 new_field
->next
= fip
->typedef_field_list
;
14010 fip
->typedef_field_list
= new_field
;
14011 fip
->typedef_field_list_count
++;
14014 /* Create the vector of fields, and attach it to the type. */
14017 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14018 struct dwarf2_cu
*cu
)
14020 int nfields
= fip
->nfields
;
14022 /* Record the field count, allocate space for the array of fields,
14023 and create blank accessibility bitfields if necessary. */
14024 TYPE_NFIELDS (type
) = nfields
;
14025 TYPE_FIELDS (type
) = (struct field
*)
14026 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
14027 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
14029 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14031 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14033 TYPE_FIELD_PRIVATE_BITS (type
) =
14034 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14035 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14037 TYPE_FIELD_PROTECTED_BITS (type
) =
14038 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14039 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14041 TYPE_FIELD_IGNORE_BITS (type
) =
14042 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14043 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14046 /* If the type has baseclasses, allocate and clear a bit vector for
14047 TYPE_FIELD_VIRTUAL_BITS. */
14048 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
14050 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
14051 unsigned char *pointer
;
14053 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14054 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14055 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14056 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
14057 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
14060 /* Copy the saved-up fields into the field vector. Start from the head of
14061 the list, adding to the tail of the field array, so that they end up in
14062 the same order in the array in which they were added to the list. */
14063 while (nfields
-- > 0)
14065 struct nextfield
*fieldp
;
14069 fieldp
= fip
->fields
;
14070 fip
->fields
= fieldp
->next
;
14074 fieldp
= fip
->baseclasses
;
14075 fip
->baseclasses
= fieldp
->next
;
14078 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
14079 switch (fieldp
->accessibility
)
14081 case DW_ACCESS_private
:
14082 if (cu
->language
!= language_ada
)
14083 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
14086 case DW_ACCESS_protected
:
14087 if (cu
->language
!= language_ada
)
14088 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
14091 case DW_ACCESS_public
:
14095 /* Unknown accessibility. Complain and treat it as public. */
14097 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
14098 fieldp
->accessibility
);
14102 if (nfields
< fip
->nbaseclasses
)
14104 switch (fieldp
->virtuality
)
14106 case DW_VIRTUALITY_virtual
:
14107 case DW_VIRTUALITY_pure_virtual
:
14108 if (cu
->language
== language_ada
)
14109 error (_("unexpected virtuality in component of Ada type"));
14110 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
14117 /* Return true if this member function is a constructor, false
14121 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14123 const char *fieldname
;
14124 const char *type_name
;
14127 if (die
->parent
== NULL
)
14130 if (die
->parent
->tag
!= DW_TAG_structure_type
14131 && die
->parent
->tag
!= DW_TAG_union_type
14132 && die
->parent
->tag
!= DW_TAG_class_type
)
14135 fieldname
= dwarf2_name (die
, cu
);
14136 type_name
= dwarf2_name (die
->parent
, cu
);
14137 if (fieldname
== NULL
|| type_name
== NULL
)
14140 len
= strlen (fieldname
);
14141 return (strncmp (fieldname
, type_name
, len
) == 0
14142 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
14145 /* Add a member function to the proper fieldlist. */
14148 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
14149 struct type
*type
, struct dwarf2_cu
*cu
)
14151 struct objfile
*objfile
= cu
->objfile
;
14152 struct attribute
*attr
;
14153 struct fnfieldlist
*flp
;
14155 struct fn_field
*fnp
;
14156 const char *fieldname
;
14157 struct nextfnfield
*new_fnfield
;
14158 struct type
*this_type
;
14159 enum dwarf_access_attribute accessibility
;
14161 if (cu
->language
== language_ada
)
14162 error (_("unexpected member function in Ada type"));
14164 /* Get name of member function. */
14165 fieldname
= dwarf2_name (die
, cu
);
14166 if (fieldname
== NULL
)
14169 /* Look up member function name in fieldlist. */
14170 for (i
= 0; i
< fip
->nfnfields
; i
++)
14172 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
14176 /* Create new list element if necessary. */
14177 if (i
< fip
->nfnfields
)
14178 flp
= &fip
->fnfieldlists
[i
];
14181 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
14183 fip
->fnfieldlists
= (struct fnfieldlist
*)
14184 xrealloc (fip
->fnfieldlists
,
14185 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
14186 * sizeof (struct fnfieldlist
));
14187 if (fip
->nfnfields
== 0)
14188 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
14190 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
14191 flp
->name
= fieldname
;
14194 i
= fip
->nfnfields
++;
14197 /* Create a new member function field and chain it to the field list
14199 new_fnfield
= XNEW (struct nextfnfield
);
14200 make_cleanup (xfree
, new_fnfield
);
14201 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
14202 new_fnfield
->next
= flp
->head
;
14203 flp
->head
= new_fnfield
;
14206 /* Fill in the member function field info. */
14207 fnp
= &new_fnfield
->fnfield
;
14209 /* Delay processing of the physname until later. */
14210 if (cu
->language
== language_cplus
)
14212 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
14217 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
14218 fnp
->physname
= physname
? physname
: "";
14221 fnp
->type
= alloc_type (objfile
);
14222 this_type
= read_type_die (die
, cu
);
14223 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
14225 int nparams
= TYPE_NFIELDS (this_type
);
14227 /* TYPE is the domain of this method, and THIS_TYPE is the type
14228 of the method itself (TYPE_CODE_METHOD). */
14229 smash_to_method_type (fnp
->type
, type
,
14230 TYPE_TARGET_TYPE (this_type
),
14231 TYPE_FIELDS (this_type
),
14232 TYPE_NFIELDS (this_type
),
14233 TYPE_VARARGS (this_type
));
14235 /* Handle static member functions.
14236 Dwarf2 has no clean way to discern C++ static and non-static
14237 member functions. G++ helps GDB by marking the first
14238 parameter for non-static member functions (which is the this
14239 pointer) as artificial. We obtain this information from
14240 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
14241 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
14242 fnp
->voffset
= VOFFSET_STATIC
;
14245 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
14246 dwarf2_full_name (fieldname
, die
, cu
));
14248 /* Get fcontext from DW_AT_containing_type if present. */
14249 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
14250 fnp
->fcontext
= die_containing_type (die
, cu
);
14252 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
14253 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
14255 /* Get accessibility. */
14256 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14258 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14260 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14261 switch (accessibility
)
14263 case DW_ACCESS_private
:
14264 fnp
->is_private
= 1;
14266 case DW_ACCESS_protected
:
14267 fnp
->is_protected
= 1;
14271 /* Check for artificial methods. */
14272 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
14273 if (attr
&& DW_UNSND (attr
) != 0)
14274 fnp
->is_artificial
= 1;
14276 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
14278 /* Get index in virtual function table if it is a virtual member
14279 function. For older versions of GCC, this is an offset in the
14280 appropriate virtual table, as specified by DW_AT_containing_type.
14281 For everyone else, it is an expression to be evaluated relative
14282 to the object address. */
14284 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
14287 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
14289 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
14291 /* Old-style GCC. */
14292 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
14294 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
14295 || (DW_BLOCK (attr
)->size
> 1
14296 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
14297 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
14299 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14300 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
14301 dwarf2_complex_location_expr_complaint ();
14303 fnp
->voffset
/= cu
->header
.addr_size
;
14307 dwarf2_complex_location_expr_complaint ();
14309 if (!fnp
->fcontext
)
14311 /* If there is no `this' field and no DW_AT_containing_type,
14312 we cannot actually find a base class context for the
14314 if (TYPE_NFIELDS (this_type
) == 0
14315 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
14317 complaint (&symfile_complaints
,
14318 _("cannot determine context for virtual member "
14319 "function \"%s\" (offset %d)"),
14320 fieldname
, to_underlying (die
->sect_off
));
14325 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
14329 else if (attr_form_is_section_offset (attr
))
14331 dwarf2_complex_location_expr_complaint ();
14335 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
14341 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14342 if (attr
&& DW_UNSND (attr
))
14344 /* GCC does this, as of 2008-08-25; PR debug/37237. */
14345 complaint (&symfile_complaints
,
14346 _("Member function \"%s\" (offset %d) is virtual "
14347 "but the vtable offset is not specified"),
14348 fieldname
, to_underlying (die
->sect_off
));
14349 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14350 TYPE_CPLUS_DYNAMIC (type
) = 1;
14355 /* Create the vector of member function fields, and attach it to the type. */
14358 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
14359 struct dwarf2_cu
*cu
)
14361 struct fnfieldlist
*flp
;
14364 if (cu
->language
== language_ada
)
14365 error (_("unexpected member functions in Ada type"));
14367 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14368 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
14369 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
14371 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
14373 struct nextfnfield
*nfp
= flp
->head
;
14374 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
14377 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
14378 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
14379 fn_flp
->fn_fields
= (struct fn_field
*)
14380 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
14381 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
14382 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
14385 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
14388 /* Returns non-zero if NAME is the name of a vtable member in CU's
14389 language, zero otherwise. */
14391 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
14393 static const char vptr
[] = "_vptr";
14394 static const char vtable
[] = "vtable";
14396 /* Look for the C++ form of the vtable. */
14397 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
14403 /* GCC outputs unnamed structures that are really pointers to member
14404 functions, with the ABI-specified layout. If TYPE describes
14405 such a structure, smash it into a member function type.
14407 GCC shouldn't do this; it should just output pointer to member DIEs.
14408 This is GCC PR debug/28767. */
14411 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
14413 struct type
*pfn_type
, *self_type
, *new_type
;
14415 /* Check for a structure with no name and two children. */
14416 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
14419 /* Check for __pfn and __delta members. */
14420 if (TYPE_FIELD_NAME (type
, 0) == NULL
14421 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
14422 || TYPE_FIELD_NAME (type
, 1) == NULL
14423 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
14426 /* Find the type of the method. */
14427 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
14428 if (pfn_type
== NULL
14429 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
14430 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
14433 /* Look for the "this" argument. */
14434 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
14435 if (TYPE_NFIELDS (pfn_type
) == 0
14436 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
14437 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
14440 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
14441 new_type
= alloc_type (objfile
);
14442 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
14443 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
14444 TYPE_VARARGS (pfn_type
));
14445 smash_to_methodptr_type (type
, new_type
);
14449 /* Called when we find the DIE that starts a structure or union scope
14450 (definition) to create a type for the structure or union. Fill in
14451 the type's name and general properties; the members will not be
14452 processed until process_structure_scope. A symbol table entry for
14453 the type will also not be done until process_structure_scope (assuming
14454 the type has a name).
14456 NOTE: we need to call these functions regardless of whether or not the
14457 DIE has a DW_AT_name attribute, since it might be an anonymous
14458 structure or union. This gets the type entered into our set of
14459 user defined types. */
14461 static struct type
*
14462 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14464 struct objfile
*objfile
= cu
->objfile
;
14466 struct attribute
*attr
;
14469 /* If the definition of this type lives in .debug_types, read that type.
14470 Don't follow DW_AT_specification though, that will take us back up
14471 the chain and we want to go down. */
14472 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
14475 type
= get_DW_AT_signature_type (die
, attr
, cu
);
14477 /* The type's CU may not be the same as CU.
14478 Ensure TYPE is recorded with CU in die_type_hash. */
14479 return set_die_type (die
, type
, cu
);
14482 type
= alloc_type (objfile
);
14483 INIT_CPLUS_SPECIFIC (type
);
14485 name
= dwarf2_name (die
, cu
);
14488 if (cu
->language
== language_cplus
14489 || cu
->language
== language_d
14490 || cu
->language
== language_rust
)
14492 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
14494 /* dwarf2_full_name might have already finished building the DIE's
14495 type. If so, there is no need to continue. */
14496 if (get_die_type (die
, cu
) != NULL
)
14497 return get_die_type (die
, cu
);
14499 TYPE_TAG_NAME (type
) = full_name
;
14500 if (die
->tag
== DW_TAG_structure_type
14501 || die
->tag
== DW_TAG_class_type
)
14502 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
14506 /* The name is already allocated along with this objfile, so
14507 we don't need to duplicate it for the type. */
14508 TYPE_TAG_NAME (type
) = name
;
14509 if (die
->tag
== DW_TAG_class_type
)
14510 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
14514 if (die
->tag
== DW_TAG_structure_type
)
14516 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
14518 else if (die
->tag
== DW_TAG_union_type
)
14520 TYPE_CODE (type
) = TYPE_CODE_UNION
;
14524 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
14527 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
14528 TYPE_DECLARED_CLASS (type
) = 1;
14530 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14533 if (attr_form_is_constant (attr
))
14534 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14537 /* For the moment, dynamic type sizes are not supported
14538 by GDB's struct type. The actual size is determined
14539 on-demand when resolving the type of a given object,
14540 so set the type's length to zero for now. Otherwise,
14541 we record an expression as the length, and that expression
14542 could lead to a very large value, which could eventually
14543 lead to us trying to allocate that much memory when creating
14544 a value of that type. */
14545 TYPE_LENGTH (type
) = 0;
14550 TYPE_LENGTH (type
) = 0;
14553 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
14555 /* ICC<14 does not output the required DW_AT_declaration on
14556 incomplete types, but gives them a size of zero. */
14557 TYPE_STUB (type
) = 1;
14560 TYPE_STUB_SUPPORTED (type
) = 1;
14562 if (die_is_declaration (die
, cu
))
14563 TYPE_STUB (type
) = 1;
14564 else if (attr
== NULL
&& die
->child
== NULL
14565 && producer_is_realview (cu
->producer
))
14566 /* RealView does not output the required DW_AT_declaration
14567 on incomplete types. */
14568 TYPE_STUB (type
) = 1;
14570 /* We need to add the type field to the die immediately so we don't
14571 infinitely recurse when dealing with pointers to the structure
14572 type within the structure itself. */
14573 set_die_type (die
, type
, cu
);
14575 /* set_die_type should be already done. */
14576 set_descriptive_type (type
, die
, cu
);
14581 /* Finish creating a structure or union type, including filling in
14582 its members and creating a symbol for it. */
14585 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
14587 struct objfile
*objfile
= cu
->objfile
;
14588 struct die_info
*child_die
;
14591 type
= get_die_type (die
, cu
);
14593 type
= read_structure_type (die
, cu
);
14595 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
14597 struct field_info fi
;
14598 std::vector
<struct symbol
*> template_args
;
14599 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
14601 memset (&fi
, 0, sizeof (struct field_info
));
14603 child_die
= die
->child
;
14605 while (child_die
&& child_die
->tag
)
14607 if (child_die
->tag
== DW_TAG_member
14608 || child_die
->tag
== DW_TAG_variable
)
14610 /* NOTE: carlton/2002-11-05: A C++ static data member
14611 should be a DW_TAG_member that is a declaration, but
14612 all versions of G++ as of this writing (so through at
14613 least 3.2.1) incorrectly generate DW_TAG_variable
14614 tags for them instead. */
14615 dwarf2_add_field (&fi
, child_die
, cu
);
14617 else if (child_die
->tag
== DW_TAG_subprogram
)
14619 /* Rust doesn't have member functions in the C++ sense.
14620 However, it does emit ordinary functions as children
14621 of a struct DIE. */
14622 if (cu
->language
== language_rust
)
14623 read_func_scope (child_die
, cu
);
14626 /* C++ member function. */
14627 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
14630 else if (child_die
->tag
== DW_TAG_inheritance
)
14632 /* C++ base class field. */
14633 dwarf2_add_field (&fi
, child_die
, cu
);
14635 else if (child_die
->tag
== DW_TAG_typedef
)
14636 dwarf2_add_typedef (&fi
, child_die
, cu
);
14637 else if (child_die
->tag
== DW_TAG_template_type_param
14638 || child_die
->tag
== DW_TAG_template_value_param
)
14640 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
14643 template_args
.push_back (arg
);
14646 child_die
= sibling_die (child_die
);
14649 /* Attach template arguments to type. */
14650 if (!template_args
.empty ())
14652 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14653 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
14654 TYPE_TEMPLATE_ARGUMENTS (type
)
14655 = XOBNEWVEC (&objfile
->objfile_obstack
,
14657 TYPE_N_TEMPLATE_ARGUMENTS (type
));
14658 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
14659 template_args
.data (),
14660 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
14661 * sizeof (struct symbol
*)));
14664 /* Attach fields and member functions to the type. */
14666 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
14669 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
14671 /* Get the type which refers to the base class (possibly this
14672 class itself) which contains the vtable pointer for the current
14673 class from the DW_AT_containing_type attribute. This use of
14674 DW_AT_containing_type is a GNU extension. */
14676 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
14678 struct type
*t
= die_containing_type (die
, cu
);
14680 set_type_vptr_basetype (type
, t
);
14685 /* Our own class provides vtbl ptr. */
14686 for (i
= TYPE_NFIELDS (t
) - 1;
14687 i
>= TYPE_N_BASECLASSES (t
);
14690 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
14692 if (is_vtable_name (fieldname
, cu
))
14694 set_type_vptr_fieldno (type
, i
);
14699 /* Complain if virtual function table field not found. */
14700 if (i
< TYPE_N_BASECLASSES (t
))
14701 complaint (&symfile_complaints
,
14702 _("virtual function table pointer "
14703 "not found when defining class '%s'"),
14704 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
14709 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
14712 else if (cu
->producer
14713 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
14715 /* The IBM XLC compiler does not provide direct indication
14716 of the containing type, but the vtable pointer is
14717 always named __vfp. */
14721 for (i
= TYPE_NFIELDS (type
) - 1;
14722 i
>= TYPE_N_BASECLASSES (type
);
14725 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
14727 set_type_vptr_fieldno (type
, i
);
14728 set_type_vptr_basetype (type
, type
);
14735 /* Copy fi.typedef_field_list linked list elements content into the
14736 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
14737 if (fi
.typedef_field_list
)
14739 int i
= fi
.typedef_field_list_count
;
14741 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14742 TYPE_TYPEDEF_FIELD_ARRAY (type
)
14743 = ((struct typedef_field
*)
14744 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
14745 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
14747 /* Reverse the list order to keep the debug info elements order. */
14750 struct typedef_field
*dest
, *src
;
14752 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
14753 src
= &fi
.typedef_field_list
->field
;
14754 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
14759 do_cleanups (back_to
);
14762 quirk_gcc_member_function_pointer (type
, objfile
);
14764 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
14765 snapshots) has been known to create a die giving a declaration
14766 for a class that has, as a child, a die giving a definition for a
14767 nested class. So we have to process our children even if the
14768 current die is a declaration. Normally, of course, a declaration
14769 won't have any children at all. */
14771 child_die
= die
->child
;
14773 while (child_die
!= NULL
&& child_die
->tag
)
14775 if (child_die
->tag
== DW_TAG_member
14776 || child_die
->tag
== DW_TAG_variable
14777 || child_die
->tag
== DW_TAG_inheritance
14778 || child_die
->tag
== DW_TAG_template_value_param
14779 || child_die
->tag
== DW_TAG_template_type_param
)
14784 process_die (child_die
, cu
);
14786 child_die
= sibling_die (child_die
);
14789 /* Do not consider external references. According to the DWARF standard,
14790 these DIEs are identified by the fact that they have no byte_size
14791 attribute, and a declaration attribute. */
14792 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
14793 || !die_is_declaration (die
, cu
))
14794 new_symbol (die
, type
, cu
);
14797 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
14798 update TYPE using some information only available in DIE's children. */
14801 update_enumeration_type_from_children (struct die_info
*die
,
14803 struct dwarf2_cu
*cu
)
14805 struct die_info
*child_die
;
14806 int unsigned_enum
= 1;
14810 auto_obstack obstack
;
14812 for (child_die
= die
->child
;
14813 child_die
!= NULL
&& child_die
->tag
;
14814 child_die
= sibling_die (child_die
))
14816 struct attribute
*attr
;
14818 const gdb_byte
*bytes
;
14819 struct dwarf2_locexpr_baton
*baton
;
14822 if (child_die
->tag
!= DW_TAG_enumerator
)
14825 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
14829 name
= dwarf2_name (child_die
, cu
);
14831 name
= "<anonymous enumerator>";
14833 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
14834 &value
, &bytes
, &baton
);
14840 else if ((mask
& value
) != 0)
14845 /* If we already know that the enum type is neither unsigned, nor
14846 a flag type, no need to look at the rest of the enumerates. */
14847 if (!unsigned_enum
&& !flag_enum
)
14852 TYPE_UNSIGNED (type
) = 1;
14854 TYPE_FLAG_ENUM (type
) = 1;
14857 /* Given a DW_AT_enumeration_type die, set its type. We do not
14858 complete the type's fields yet, or create any symbols. */
14860 static struct type
*
14861 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14863 struct objfile
*objfile
= cu
->objfile
;
14865 struct attribute
*attr
;
14868 /* If the definition of this type lives in .debug_types, read that type.
14869 Don't follow DW_AT_specification though, that will take us back up
14870 the chain and we want to go down. */
14871 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
14874 type
= get_DW_AT_signature_type (die
, attr
, cu
);
14876 /* The type's CU may not be the same as CU.
14877 Ensure TYPE is recorded with CU in die_type_hash. */
14878 return set_die_type (die
, type
, cu
);
14881 type
= alloc_type (objfile
);
14883 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
14884 name
= dwarf2_full_name (NULL
, die
, cu
);
14886 TYPE_TAG_NAME (type
) = name
;
14888 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14891 struct type
*underlying_type
= die_type (die
, cu
);
14893 TYPE_TARGET_TYPE (type
) = underlying_type
;
14896 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14899 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14903 TYPE_LENGTH (type
) = 0;
14906 /* The enumeration DIE can be incomplete. In Ada, any type can be
14907 declared as private in the package spec, and then defined only
14908 inside the package body. Such types are known as Taft Amendment
14909 Types. When another package uses such a type, an incomplete DIE
14910 may be generated by the compiler. */
14911 if (die_is_declaration (die
, cu
))
14912 TYPE_STUB (type
) = 1;
14914 /* Finish the creation of this type by using the enum's children.
14915 We must call this even when the underlying type has been provided
14916 so that we can determine if we're looking at a "flag" enum. */
14917 update_enumeration_type_from_children (die
, type
, cu
);
14919 /* If this type has an underlying type that is not a stub, then we
14920 may use its attributes. We always use the "unsigned" attribute
14921 in this situation, because ordinarily we guess whether the type
14922 is unsigned -- but the guess can be wrong and the underlying type
14923 can tell us the reality. However, we defer to a local size
14924 attribute if one exists, because this lets the compiler override
14925 the underlying type if needed. */
14926 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
14928 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
14929 if (TYPE_LENGTH (type
) == 0)
14930 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
14933 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
14935 return set_die_type (die
, type
, cu
);
14938 /* Given a pointer to a die which begins an enumeration, process all
14939 the dies that define the members of the enumeration, and create the
14940 symbol for the enumeration type.
14942 NOTE: We reverse the order of the element list. */
14945 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
14947 struct type
*this_type
;
14949 this_type
= get_die_type (die
, cu
);
14950 if (this_type
== NULL
)
14951 this_type
= read_enumeration_type (die
, cu
);
14953 if (die
->child
!= NULL
)
14955 struct die_info
*child_die
;
14956 struct symbol
*sym
;
14957 struct field
*fields
= NULL
;
14958 int num_fields
= 0;
14961 child_die
= die
->child
;
14962 while (child_die
&& child_die
->tag
)
14964 if (child_die
->tag
!= DW_TAG_enumerator
)
14966 process_die (child_die
, cu
);
14970 name
= dwarf2_name (child_die
, cu
);
14973 sym
= new_symbol (child_die
, this_type
, cu
);
14975 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
14977 fields
= (struct field
*)
14979 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
14980 * sizeof (struct field
));
14983 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
14984 FIELD_TYPE (fields
[num_fields
]) = NULL
;
14985 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
14986 FIELD_BITSIZE (fields
[num_fields
]) = 0;
14992 child_die
= sibling_die (child_die
);
14997 TYPE_NFIELDS (this_type
) = num_fields
;
14998 TYPE_FIELDS (this_type
) = (struct field
*)
14999 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
15000 memcpy (TYPE_FIELDS (this_type
), fields
,
15001 sizeof (struct field
) * num_fields
);
15006 /* If we are reading an enum from a .debug_types unit, and the enum
15007 is a declaration, and the enum is not the signatured type in the
15008 unit, then we do not want to add a symbol for it. Adding a
15009 symbol would in some cases obscure the true definition of the
15010 enum, giving users an incomplete type when the definition is
15011 actually available. Note that we do not want to do this for all
15012 enums which are just declarations, because C++0x allows forward
15013 enum declarations. */
15014 if (cu
->per_cu
->is_debug_types
15015 && die_is_declaration (die
, cu
))
15017 struct signatured_type
*sig_type
;
15019 sig_type
= (struct signatured_type
*) cu
->per_cu
;
15020 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
15021 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
15025 new_symbol (die
, this_type
, cu
);
15028 /* Extract all information from a DW_TAG_array_type DIE and put it in
15029 the DIE's type field. For now, this only handles one dimensional
15032 static struct type
*
15033 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15035 struct objfile
*objfile
= cu
->objfile
;
15036 struct die_info
*child_die
;
15038 struct type
*element_type
, *range_type
, *index_type
;
15039 struct attribute
*attr
;
15041 unsigned int bit_stride
= 0;
15043 element_type
= die_type (die
, cu
);
15045 /* The die_type call above may have already set the type for this DIE. */
15046 type
= get_die_type (die
, cu
);
15050 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
15052 bit_stride
= DW_UNSND (attr
) * 8;
15054 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
15056 bit_stride
= DW_UNSND (attr
);
15058 /* Irix 6.2 native cc creates array types without children for
15059 arrays with unspecified length. */
15060 if (die
->child
== NULL
)
15062 index_type
= objfile_type (objfile
)->builtin_int
;
15063 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
15064 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
15066 return set_die_type (die
, type
, cu
);
15069 std::vector
<struct type
*> range_types
;
15070 child_die
= die
->child
;
15071 while (child_die
&& child_die
->tag
)
15073 if (child_die
->tag
== DW_TAG_subrange_type
)
15075 struct type
*child_type
= read_type_die (child_die
, cu
);
15077 if (child_type
!= NULL
)
15079 /* The range type was succesfully read. Save it for the
15080 array type creation. */
15081 range_types
.push_back (child_type
);
15084 child_die
= sibling_die (child_die
);
15087 /* Dwarf2 dimensions are output from left to right, create the
15088 necessary array types in backwards order. */
15090 type
= element_type
;
15092 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
15096 while (i
< range_types
.size ())
15097 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
15102 size_t ndim
= range_types
.size ();
15104 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
15108 /* Understand Dwarf2 support for vector types (like they occur on
15109 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
15110 array type. This is not part of the Dwarf2/3 standard yet, but a
15111 custom vendor extension. The main difference between a regular
15112 array and the vector variant is that vectors are passed by value
15114 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
15116 make_vector_type (type
);
15118 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
15119 implementation may choose to implement triple vectors using this
15121 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15124 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
15125 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15127 complaint (&symfile_complaints
,
15128 _("DW_AT_byte_size for array type smaller "
15129 "than the total size of elements"));
15132 name
= dwarf2_name (die
, cu
);
15134 TYPE_NAME (type
) = name
;
15136 /* Install the type in the die. */
15137 set_die_type (die
, type
, cu
);
15139 /* set_die_type should be already done. */
15140 set_descriptive_type (type
, die
, cu
);
15145 static enum dwarf_array_dim_ordering
15146 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
15148 struct attribute
*attr
;
15150 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
15153 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
15155 /* GNU F77 is a special case, as at 08/2004 array type info is the
15156 opposite order to the dwarf2 specification, but data is still
15157 laid out as per normal fortran.
15159 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
15160 version checking. */
15162 if (cu
->language
== language_fortran
15163 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
15165 return DW_ORD_row_major
;
15168 switch (cu
->language_defn
->la_array_ordering
)
15170 case array_column_major
:
15171 return DW_ORD_col_major
;
15172 case array_row_major
:
15174 return DW_ORD_row_major
;
15178 /* Extract all information from a DW_TAG_set_type DIE and put it in
15179 the DIE's type field. */
15181 static struct type
*
15182 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15184 struct type
*domain_type
, *set_type
;
15185 struct attribute
*attr
;
15187 domain_type
= die_type (die
, cu
);
15189 /* The die_type call above may have already set the type for this DIE. */
15190 set_type
= get_die_type (die
, cu
);
15194 set_type
= create_set_type (NULL
, domain_type
);
15196 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15198 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
15200 return set_die_type (die
, set_type
, cu
);
15203 /* A helper for read_common_block that creates a locexpr baton.
15204 SYM is the symbol which we are marking as computed.
15205 COMMON_DIE is the DIE for the common block.
15206 COMMON_LOC is the location expression attribute for the common
15208 MEMBER_LOC is the location expression attribute for the particular
15209 member of the common block that we are processing.
15210 CU is the CU from which the above come. */
15213 mark_common_block_symbol_computed (struct symbol
*sym
,
15214 struct die_info
*common_die
,
15215 struct attribute
*common_loc
,
15216 struct attribute
*member_loc
,
15217 struct dwarf2_cu
*cu
)
15219 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15220 struct dwarf2_locexpr_baton
*baton
;
15222 unsigned int cu_off
;
15223 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
15224 LONGEST offset
= 0;
15226 gdb_assert (common_loc
&& member_loc
);
15227 gdb_assert (attr_form_is_block (common_loc
));
15228 gdb_assert (attr_form_is_block (member_loc
)
15229 || attr_form_is_constant (member_loc
));
15231 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
15232 baton
->per_cu
= cu
->per_cu
;
15233 gdb_assert (baton
->per_cu
);
15235 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
15237 if (attr_form_is_constant (member_loc
))
15239 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
15240 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
15243 baton
->size
+= DW_BLOCK (member_loc
)->size
;
15245 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
15248 *ptr
++ = DW_OP_call4
;
15249 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
15250 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
15253 if (attr_form_is_constant (member_loc
))
15255 *ptr
++ = DW_OP_addr
;
15256 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
15257 ptr
+= cu
->header
.addr_size
;
15261 /* We have to copy the data here, because DW_OP_call4 will only
15262 use a DW_AT_location attribute. */
15263 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
15264 ptr
+= DW_BLOCK (member_loc
)->size
;
15267 *ptr
++ = DW_OP_plus
;
15268 gdb_assert (ptr
- baton
->data
== baton
->size
);
15270 SYMBOL_LOCATION_BATON (sym
) = baton
;
15271 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
15274 /* Create appropriate locally-scoped variables for all the
15275 DW_TAG_common_block entries. Also create a struct common_block
15276 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
15277 is used to sepate the common blocks name namespace from regular
15281 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
15283 struct attribute
*attr
;
15285 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15288 /* Support the .debug_loc offsets. */
15289 if (attr_form_is_block (attr
))
15293 else if (attr_form_is_section_offset (attr
))
15295 dwarf2_complex_location_expr_complaint ();
15300 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15301 "common block member");
15306 if (die
->child
!= NULL
)
15308 struct objfile
*objfile
= cu
->objfile
;
15309 struct die_info
*child_die
;
15310 size_t n_entries
= 0, size
;
15311 struct common_block
*common_block
;
15312 struct symbol
*sym
;
15314 for (child_die
= die
->child
;
15315 child_die
&& child_die
->tag
;
15316 child_die
= sibling_die (child_die
))
15319 size
= (sizeof (struct common_block
)
15320 + (n_entries
- 1) * sizeof (struct symbol
*));
15322 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
15324 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
15325 common_block
->n_entries
= 0;
15327 for (child_die
= die
->child
;
15328 child_die
&& child_die
->tag
;
15329 child_die
= sibling_die (child_die
))
15331 /* Create the symbol in the DW_TAG_common_block block in the current
15333 sym
= new_symbol (child_die
, NULL
, cu
);
15336 struct attribute
*member_loc
;
15338 common_block
->contents
[common_block
->n_entries
++] = sym
;
15340 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
15344 /* GDB has handled this for a long time, but it is
15345 not specified by DWARF. It seems to have been
15346 emitted by gfortran at least as recently as:
15347 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
15348 complaint (&symfile_complaints
,
15349 _("Variable in common block has "
15350 "DW_AT_data_member_location "
15351 "- DIE at 0x%x [in module %s]"),
15352 to_underlying (child_die
->sect_off
),
15353 objfile_name (cu
->objfile
));
15355 if (attr_form_is_section_offset (member_loc
))
15356 dwarf2_complex_location_expr_complaint ();
15357 else if (attr_form_is_constant (member_loc
)
15358 || attr_form_is_block (member_loc
))
15361 mark_common_block_symbol_computed (sym
, die
, attr
,
15365 dwarf2_complex_location_expr_complaint ();
15370 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
15371 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
15375 /* Create a type for a C++ namespace. */
15377 static struct type
*
15378 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15380 struct objfile
*objfile
= cu
->objfile
;
15381 const char *previous_prefix
, *name
;
15385 /* For extensions, reuse the type of the original namespace. */
15386 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
15388 struct die_info
*ext_die
;
15389 struct dwarf2_cu
*ext_cu
= cu
;
15391 ext_die
= dwarf2_extension (die
, &ext_cu
);
15392 type
= read_type_die (ext_die
, ext_cu
);
15394 /* EXT_CU may not be the same as CU.
15395 Ensure TYPE is recorded with CU in die_type_hash. */
15396 return set_die_type (die
, type
, cu
);
15399 name
= namespace_name (die
, &is_anonymous
, cu
);
15401 /* Now build the name of the current namespace. */
15403 previous_prefix
= determine_prefix (die
, cu
);
15404 if (previous_prefix
[0] != '\0')
15405 name
= typename_concat (&objfile
->objfile_obstack
,
15406 previous_prefix
, name
, 0, cu
);
15408 /* Create the type. */
15409 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
15410 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
15412 return set_die_type (die
, type
, cu
);
15415 /* Read a namespace scope. */
15418 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
15420 struct objfile
*objfile
= cu
->objfile
;
15423 /* Add a symbol associated to this if we haven't seen the namespace
15424 before. Also, add a using directive if it's an anonymous
15427 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
15431 type
= read_type_die (die
, cu
);
15432 new_symbol (die
, type
, cu
);
15434 namespace_name (die
, &is_anonymous
, cu
);
15437 const char *previous_prefix
= determine_prefix (die
, cu
);
15439 std::vector
<const char *> excludes
;
15440 add_using_directive (using_directives (cu
->language
),
15441 previous_prefix
, TYPE_NAME (type
), NULL
,
15442 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
15446 if (die
->child
!= NULL
)
15448 struct die_info
*child_die
= die
->child
;
15450 while (child_die
&& child_die
->tag
)
15452 process_die (child_die
, cu
);
15453 child_die
= sibling_die (child_die
);
15458 /* Read a Fortran module as type. This DIE can be only a declaration used for
15459 imported module. Still we need that type as local Fortran "use ... only"
15460 declaration imports depend on the created type in determine_prefix. */
15462 static struct type
*
15463 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15465 struct objfile
*objfile
= cu
->objfile
;
15466 const char *module_name
;
15469 module_name
= dwarf2_name (die
, cu
);
15471 complaint (&symfile_complaints
,
15472 _("DW_TAG_module has no name, offset 0x%x"),
15473 to_underlying (die
->sect_off
));
15474 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
15476 /* determine_prefix uses TYPE_TAG_NAME. */
15477 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
15479 return set_die_type (die
, type
, cu
);
15482 /* Read a Fortran module. */
15485 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
15487 struct die_info
*child_die
= die
->child
;
15490 type
= read_type_die (die
, cu
);
15491 new_symbol (die
, type
, cu
);
15493 while (child_die
&& child_die
->tag
)
15495 process_die (child_die
, cu
);
15496 child_die
= sibling_die (child_die
);
15500 /* Return the name of the namespace represented by DIE. Set
15501 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
15504 static const char *
15505 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
15507 struct die_info
*current_die
;
15508 const char *name
= NULL
;
15510 /* Loop through the extensions until we find a name. */
15512 for (current_die
= die
;
15513 current_die
!= NULL
;
15514 current_die
= dwarf2_extension (die
, &cu
))
15516 /* We don't use dwarf2_name here so that we can detect the absence
15517 of a name -> anonymous namespace. */
15518 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
15524 /* Is it an anonymous namespace? */
15526 *is_anonymous
= (name
== NULL
);
15528 name
= CP_ANONYMOUS_NAMESPACE_STR
;
15533 /* Extract all information from a DW_TAG_pointer_type DIE and add to
15534 the user defined type vector. */
15536 static struct type
*
15537 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15539 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
15540 struct comp_unit_head
*cu_header
= &cu
->header
;
15542 struct attribute
*attr_byte_size
;
15543 struct attribute
*attr_address_class
;
15544 int byte_size
, addr_class
;
15545 struct type
*target_type
;
15547 target_type
= die_type (die
, cu
);
15549 /* The die_type call above may have already set the type for this DIE. */
15550 type
= get_die_type (die
, cu
);
15554 type
= lookup_pointer_type (target_type
);
15556 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15557 if (attr_byte_size
)
15558 byte_size
= DW_UNSND (attr_byte_size
);
15560 byte_size
= cu_header
->addr_size
;
15562 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
15563 if (attr_address_class
)
15564 addr_class
= DW_UNSND (attr_address_class
);
15566 addr_class
= DW_ADDR_none
;
15568 /* If the pointer size or address class is different than the
15569 default, create a type variant marked as such and set the
15570 length accordingly. */
15571 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
15573 if (gdbarch_address_class_type_flags_p (gdbarch
))
15577 type_flags
= gdbarch_address_class_type_flags
15578 (gdbarch
, byte_size
, addr_class
);
15579 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
15581 type
= make_type_with_address_space (type
, type_flags
);
15583 else if (TYPE_LENGTH (type
) != byte_size
)
15585 complaint (&symfile_complaints
,
15586 _("invalid pointer size %d"), byte_size
);
15590 /* Should we also complain about unhandled address classes? */
15594 TYPE_LENGTH (type
) = byte_size
;
15595 return set_die_type (die
, type
, cu
);
15598 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
15599 the user defined type vector. */
15601 static struct type
*
15602 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15605 struct type
*to_type
;
15606 struct type
*domain
;
15608 to_type
= die_type (die
, cu
);
15609 domain
= die_containing_type (die
, cu
);
15611 /* The calls above may have already set the type for this DIE. */
15612 type
= get_die_type (die
, cu
);
15616 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
15617 type
= lookup_methodptr_type (to_type
);
15618 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
15620 struct type
*new_type
= alloc_type (cu
->objfile
);
15622 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
15623 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
15624 TYPE_VARARGS (to_type
));
15625 type
= lookup_methodptr_type (new_type
);
15628 type
= lookup_memberptr_type (to_type
, domain
);
15630 return set_die_type (die
, type
, cu
);
15633 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
15634 the user defined type vector. */
15636 static struct type
*
15637 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
15638 enum type_code refcode
)
15640 struct comp_unit_head
*cu_header
= &cu
->header
;
15641 struct type
*type
, *target_type
;
15642 struct attribute
*attr
;
15644 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
15646 target_type
= die_type (die
, cu
);
15648 /* The die_type call above may have already set the type for this DIE. */
15649 type
= get_die_type (die
, cu
);
15653 type
= lookup_reference_type (target_type
, refcode
);
15654 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15657 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15661 TYPE_LENGTH (type
) = cu_header
->addr_size
;
15663 return set_die_type (die
, type
, cu
);
15666 /* Add the given cv-qualifiers to the element type of the array. GCC
15667 outputs DWARF type qualifiers that apply to an array, not the
15668 element type. But GDB relies on the array element type to carry
15669 the cv-qualifiers. This mimics section 6.7.3 of the C99
15672 static struct type
*
15673 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
15674 struct type
*base_type
, int cnst
, int voltl
)
15676 struct type
*el_type
, *inner_array
;
15678 base_type
= copy_type (base_type
);
15679 inner_array
= base_type
;
15681 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
15683 TYPE_TARGET_TYPE (inner_array
) =
15684 copy_type (TYPE_TARGET_TYPE (inner_array
));
15685 inner_array
= TYPE_TARGET_TYPE (inner_array
);
15688 el_type
= TYPE_TARGET_TYPE (inner_array
);
15689 cnst
|= TYPE_CONST (el_type
);
15690 voltl
|= TYPE_VOLATILE (el_type
);
15691 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
15693 return set_die_type (die
, base_type
, cu
);
15696 static struct type
*
15697 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15699 struct type
*base_type
, *cv_type
;
15701 base_type
= die_type (die
, cu
);
15703 /* The die_type call above may have already set the type for this DIE. */
15704 cv_type
= get_die_type (die
, cu
);
15708 /* In case the const qualifier is applied to an array type, the element type
15709 is so qualified, not the array type (section 6.7.3 of C99). */
15710 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
15711 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
15713 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
15714 return set_die_type (die
, cv_type
, cu
);
15717 static struct type
*
15718 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15720 struct type
*base_type
, *cv_type
;
15722 base_type
= die_type (die
, cu
);
15724 /* The die_type call above may have already set the type for this DIE. */
15725 cv_type
= get_die_type (die
, cu
);
15729 /* In case the volatile qualifier is applied to an array type, the
15730 element type is so qualified, not the array type (section 6.7.3
15732 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
15733 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
15735 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
15736 return set_die_type (die
, cv_type
, cu
);
15739 /* Handle DW_TAG_restrict_type. */
15741 static struct type
*
15742 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15744 struct type
*base_type
, *cv_type
;
15746 base_type
= die_type (die
, cu
);
15748 /* The die_type call above may have already set the type for this DIE. */
15749 cv_type
= get_die_type (die
, cu
);
15753 cv_type
= make_restrict_type (base_type
);
15754 return set_die_type (die
, cv_type
, cu
);
15757 /* Handle DW_TAG_atomic_type. */
15759 static struct type
*
15760 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15762 struct type
*base_type
, *cv_type
;
15764 base_type
= die_type (die
, cu
);
15766 /* The die_type call above may have already set the type for this DIE. */
15767 cv_type
= get_die_type (die
, cu
);
15771 cv_type
= make_atomic_type (base_type
);
15772 return set_die_type (die
, cv_type
, cu
);
15775 /* Extract all information from a DW_TAG_string_type DIE and add to
15776 the user defined type vector. It isn't really a user defined type,
15777 but it behaves like one, with other DIE's using an AT_user_def_type
15778 attribute to reference it. */
15780 static struct type
*
15781 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15783 struct objfile
*objfile
= cu
->objfile
;
15784 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15785 struct type
*type
, *range_type
, *index_type
, *char_type
;
15786 struct attribute
*attr
;
15787 unsigned int length
;
15789 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
15792 length
= DW_UNSND (attr
);
15796 /* Check for the DW_AT_byte_size attribute. */
15797 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15800 length
= DW_UNSND (attr
);
15808 index_type
= objfile_type (objfile
)->builtin_int
;
15809 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
15810 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
15811 type
= create_string_type (NULL
, char_type
, range_type
);
15813 return set_die_type (die
, type
, cu
);
15816 /* Assuming that DIE corresponds to a function, returns nonzero
15817 if the function is prototyped. */
15820 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
15822 struct attribute
*attr
;
15824 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
15825 if (attr
&& (DW_UNSND (attr
) != 0))
15828 /* The DWARF standard implies that the DW_AT_prototyped attribute
15829 is only meaninful for C, but the concept also extends to other
15830 languages that allow unprototyped functions (Eg: Objective C).
15831 For all other languages, assume that functions are always
15833 if (cu
->language
!= language_c
15834 && cu
->language
!= language_objc
15835 && cu
->language
!= language_opencl
)
15838 /* RealView does not emit DW_AT_prototyped. We can not distinguish
15839 prototyped and unprototyped functions; default to prototyped,
15840 since that is more common in modern code (and RealView warns
15841 about unprototyped functions). */
15842 if (producer_is_realview (cu
->producer
))
15848 /* Handle DIES due to C code like:
15852 int (*funcp)(int a, long l);
15856 ('funcp' generates a DW_TAG_subroutine_type DIE). */
15858 static struct type
*
15859 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15861 struct objfile
*objfile
= cu
->objfile
;
15862 struct type
*type
; /* Type that this function returns. */
15863 struct type
*ftype
; /* Function that returns above type. */
15864 struct attribute
*attr
;
15866 type
= die_type (die
, cu
);
15868 /* The die_type call above may have already set the type for this DIE. */
15869 ftype
= get_die_type (die
, cu
);
15873 ftype
= lookup_function_type (type
);
15875 if (prototyped_function_p (die
, cu
))
15876 TYPE_PROTOTYPED (ftype
) = 1;
15878 /* Store the calling convention in the type if it's available in
15879 the subroutine die. Otherwise set the calling convention to
15880 the default value DW_CC_normal. */
15881 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15883 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
15884 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
15885 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
15887 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
15889 /* Record whether the function returns normally to its caller or not
15890 if the DWARF producer set that information. */
15891 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
15892 if (attr
&& (DW_UNSND (attr
) != 0))
15893 TYPE_NO_RETURN (ftype
) = 1;
15895 /* We need to add the subroutine type to the die immediately so
15896 we don't infinitely recurse when dealing with parameters
15897 declared as the same subroutine type. */
15898 set_die_type (die
, ftype
, cu
);
15900 if (die
->child
!= NULL
)
15902 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
15903 struct die_info
*child_die
;
15904 int nparams
, iparams
;
15906 /* Count the number of parameters.
15907 FIXME: GDB currently ignores vararg functions, but knows about
15908 vararg member functions. */
15910 child_die
= die
->child
;
15911 while (child_die
&& child_die
->tag
)
15913 if (child_die
->tag
== DW_TAG_formal_parameter
)
15915 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
15916 TYPE_VARARGS (ftype
) = 1;
15917 child_die
= sibling_die (child_die
);
15920 /* Allocate storage for parameters and fill them in. */
15921 TYPE_NFIELDS (ftype
) = nparams
;
15922 TYPE_FIELDS (ftype
) = (struct field
*)
15923 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
15925 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
15926 even if we error out during the parameters reading below. */
15927 for (iparams
= 0; iparams
< nparams
; iparams
++)
15928 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
15931 child_die
= die
->child
;
15932 while (child_die
&& child_die
->tag
)
15934 if (child_die
->tag
== DW_TAG_formal_parameter
)
15936 struct type
*arg_type
;
15938 /* DWARF version 2 has no clean way to discern C++
15939 static and non-static member functions. G++ helps
15940 GDB by marking the first parameter for non-static
15941 member functions (which is the this pointer) as
15942 artificial. We pass this information to
15943 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
15945 DWARF version 3 added DW_AT_object_pointer, which GCC
15946 4.5 does not yet generate. */
15947 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
15949 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
15951 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
15952 arg_type
= die_type (child_die
, cu
);
15954 /* RealView does not mark THIS as const, which the testsuite
15955 expects. GCC marks THIS as const in method definitions,
15956 but not in the class specifications (GCC PR 43053). */
15957 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
15958 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
15961 struct dwarf2_cu
*arg_cu
= cu
;
15962 const char *name
= dwarf2_name (child_die
, cu
);
15964 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
15967 /* If the compiler emits this, use it. */
15968 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
15971 else if (name
&& strcmp (name
, "this") == 0)
15972 /* Function definitions will have the argument names. */
15974 else if (name
== NULL
&& iparams
== 0)
15975 /* Declarations may not have the names, so like
15976 elsewhere in GDB, assume an artificial first
15977 argument is "this". */
15981 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
15985 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
15988 child_die
= sibling_die (child_die
);
15995 static struct type
*
15996 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
15998 struct objfile
*objfile
= cu
->objfile
;
15999 const char *name
= NULL
;
16000 struct type
*this_type
, *target_type
;
16002 name
= dwarf2_full_name (NULL
, die
, cu
);
16003 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
16004 TYPE_TARGET_STUB (this_type
) = 1;
16005 set_die_type (die
, this_type
, cu
);
16006 target_type
= die_type (die
, cu
);
16007 if (target_type
!= this_type
)
16008 TYPE_TARGET_TYPE (this_type
) = target_type
;
16011 /* Self-referential typedefs are, it seems, not allowed by the DWARF
16012 spec and cause infinite loops in GDB. */
16013 complaint (&symfile_complaints
,
16014 _("Self-referential DW_TAG_typedef "
16015 "- DIE at 0x%x [in module %s]"),
16016 to_underlying (die
->sect_off
), objfile_name (objfile
));
16017 TYPE_TARGET_TYPE (this_type
) = NULL
;
16022 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
16023 (which may be different from NAME) to the architecture back-end to allow
16024 it to guess the correct format if necessary. */
16026 static struct type
*
16027 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
16028 const char *name_hint
)
16030 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16031 const struct floatformat
**format
;
16034 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
16036 type
= init_float_type (objfile
, bits
, name
, format
);
16038 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
16043 /* Find a representation of a given base type and install
16044 it in the TYPE field of the die. */
16046 static struct type
*
16047 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16049 struct objfile
*objfile
= cu
->objfile
;
16051 struct attribute
*attr
;
16052 int encoding
= 0, bits
= 0;
16055 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
16058 encoding
= DW_UNSND (attr
);
16060 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16063 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
16065 name
= dwarf2_name (die
, cu
);
16068 complaint (&symfile_complaints
,
16069 _("DW_AT_name missing from DW_TAG_base_type"));
16074 case DW_ATE_address
:
16075 /* Turn DW_ATE_address into a void * pointer. */
16076 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
16077 type
= init_pointer_type (objfile
, bits
, name
, type
);
16079 case DW_ATE_boolean
:
16080 type
= init_boolean_type (objfile
, bits
, 1, name
);
16082 case DW_ATE_complex_float
:
16083 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
16084 type
= init_complex_type (objfile
, name
, type
);
16086 case DW_ATE_decimal_float
:
16087 type
= init_decfloat_type (objfile
, bits
, name
);
16090 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
16092 case DW_ATE_signed
:
16093 type
= init_integer_type (objfile
, bits
, 0, name
);
16095 case DW_ATE_unsigned
:
16096 if (cu
->language
== language_fortran
16098 && startswith (name
, "character("))
16099 type
= init_character_type (objfile
, bits
, 1, name
);
16101 type
= init_integer_type (objfile
, bits
, 1, name
);
16103 case DW_ATE_signed_char
:
16104 if (cu
->language
== language_ada
|| cu
->language
== language_m2
16105 || cu
->language
== language_pascal
16106 || cu
->language
== language_fortran
)
16107 type
= init_character_type (objfile
, bits
, 0, name
);
16109 type
= init_integer_type (objfile
, bits
, 0, name
);
16111 case DW_ATE_unsigned_char
:
16112 if (cu
->language
== language_ada
|| cu
->language
== language_m2
16113 || cu
->language
== language_pascal
16114 || cu
->language
== language_fortran
16115 || cu
->language
== language_rust
)
16116 type
= init_character_type (objfile
, bits
, 1, name
);
16118 type
= init_integer_type (objfile
, bits
, 1, name
);
16122 gdbarch
*arch
= get_objfile_arch (objfile
);
16125 type
= builtin_type (arch
)->builtin_char16
;
16126 else if (bits
== 32)
16127 type
= builtin_type (arch
)->builtin_char32
;
16130 complaint (&symfile_complaints
,
16131 _("unsupported DW_ATE_UTF bit size: '%d'"),
16133 type
= init_integer_type (objfile
, bits
, 1, name
);
16135 return set_die_type (die
, type
, cu
);
16140 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
16141 dwarf_type_encoding_name (encoding
));
16142 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
16146 if (name
&& strcmp (name
, "char") == 0)
16147 TYPE_NOSIGN (type
) = 1;
16149 return set_die_type (die
, type
, cu
);
16152 /* Parse dwarf attribute if it's a block, reference or constant and put the
16153 resulting value of the attribute into struct bound_prop.
16154 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
16157 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
16158 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
16160 struct dwarf2_property_baton
*baton
;
16161 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
16163 if (attr
== NULL
|| prop
== NULL
)
16166 if (attr_form_is_block (attr
))
16168 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
16169 baton
->referenced_type
= NULL
;
16170 baton
->locexpr
.per_cu
= cu
->per_cu
;
16171 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
16172 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
16173 prop
->data
.baton
= baton
;
16174 prop
->kind
= PROP_LOCEXPR
;
16175 gdb_assert (prop
->data
.baton
!= NULL
);
16177 else if (attr_form_is_ref (attr
))
16179 struct dwarf2_cu
*target_cu
= cu
;
16180 struct die_info
*target_die
;
16181 struct attribute
*target_attr
;
16183 target_die
= follow_die_ref (die
, attr
, &target_cu
);
16184 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
16185 if (target_attr
== NULL
)
16186 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
16188 if (target_attr
== NULL
)
16191 switch (target_attr
->name
)
16193 case DW_AT_location
:
16194 if (attr_form_is_section_offset (target_attr
))
16196 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
16197 baton
->referenced_type
= die_type (target_die
, target_cu
);
16198 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
16199 prop
->data
.baton
= baton
;
16200 prop
->kind
= PROP_LOCLIST
;
16201 gdb_assert (prop
->data
.baton
!= NULL
);
16203 else if (attr_form_is_block (target_attr
))
16205 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
16206 baton
->referenced_type
= die_type (target_die
, target_cu
);
16207 baton
->locexpr
.per_cu
= cu
->per_cu
;
16208 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
16209 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
16210 prop
->data
.baton
= baton
;
16211 prop
->kind
= PROP_LOCEXPR
;
16212 gdb_assert (prop
->data
.baton
!= NULL
);
16216 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16217 "dynamic property");
16221 case DW_AT_data_member_location
:
16225 if (!handle_data_member_location (target_die
, target_cu
,
16229 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
16230 baton
->referenced_type
= read_type_die (target_die
->parent
,
16232 baton
->offset_info
.offset
= offset
;
16233 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
16234 prop
->data
.baton
= baton
;
16235 prop
->kind
= PROP_ADDR_OFFSET
;
16240 else if (attr_form_is_constant (attr
))
16242 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
16243 prop
->kind
= PROP_CONST
;
16247 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
16248 dwarf2_name (die
, cu
));
16255 /* Read the given DW_AT_subrange DIE. */
16257 static struct type
*
16258 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16260 struct type
*base_type
, *orig_base_type
;
16261 struct type
*range_type
;
16262 struct attribute
*attr
;
16263 struct dynamic_prop low
, high
;
16264 int low_default_is_valid
;
16265 int high_bound_is_count
= 0;
16267 LONGEST negative_mask
;
16269 orig_base_type
= die_type (die
, cu
);
16270 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
16271 whereas the real type might be. So, we use ORIG_BASE_TYPE when
16272 creating the range type, but we use the result of check_typedef
16273 when examining properties of the type. */
16274 base_type
= check_typedef (orig_base_type
);
16276 /* The die_type call above may have already set the type for this DIE. */
16277 range_type
= get_die_type (die
, cu
);
16281 low
.kind
= PROP_CONST
;
16282 high
.kind
= PROP_CONST
;
16283 high
.data
.const_val
= 0;
16285 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
16286 omitting DW_AT_lower_bound. */
16287 switch (cu
->language
)
16290 case language_cplus
:
16291 low
.data
.const_val
= 0;
16292 low_default_is_valid
= 1;
16294 case language_fortran
:
16295 low
.data
.const_val
= 1;
16296 low_default_is_valid
= 1;
16299 case language_objc
:
16300 case language_rust
:
16301 low
.data
.const_val
= 0;
16302 low_default_is_valid
= (cu
->header
.version
>= 4);
16306 case language_pascal
:
16307 low
.data
.const_val
= 1;
16308 low_default_is_valid
= (cu
->header
.version
>= 4);
16311 low
.data
.const_val
= 0;
16312 low_default_is_valid
= 0;
16316 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
16318 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
16319 else if (!low_default_is_valid
)
16320 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
16321 "- DIE at 0x%x [in module %s]"),
16322 to_underlying (die
->sect_off
), objfile_name (cu
->objfile
));
16324 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
16325 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
16327 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
16328 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
16330 /* If bounds are constant do the final calculation here. */
16331 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
16332 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
16334 high_bound_is_count
= 1;
16338 /* Dwarf-2 specifications explicitly allows to create subrange types
16339 without specifying a base type.
16340 In that case, the base type must be set to the type of
16341 the lower bound, upper bound or count, in that order, if any of these
16342 three attributes references an object that has a type.
16343 If no base type is found, the Dwarf-2 specifications say that
16344 a signed integer type of size equal to the size of an address should
16346 For the following C code: `extern char gdb_int [];'
16347 GCC produces an empty range DIE.
16348 FIXME: muller/2010-05-28: Possible references to object for low bound,
16349 high bound or count are not yet handled by this code. */
16350 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
16352 struct objfile
*objfile
= cu
->objfile
;
16353 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16354 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
16355 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
16357 /* Test "int", "long int", and "long long int" objfile types,
16358 and select the first one having a size above or equal to the
16359 architecture address size. */
16360 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
16361 base_type
= int_type
;
16364 int_type
= objfile_type (objfile
)->builtin_long
;
16365 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
16366 base_type
= int_type
;
16369 int_type
= objfile_type (objfile
)->builtin_long_long
;
16370 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
16371 base_type
= int_type
;
16376 /* Normally, the DWARF producers are expected to use a signed
16377 constant form (Eg. DW_FORM_sdata) to express negative bounds.
16378 But this is unfortunately not always the case, as witnessed
16379 with GCC, for instance, where the ambiguous DW_FORM_dataN form
16380 is used instead. To work around that ambiguity, we treat
16381 the bounds as signed, and thus sign-extend their values, when
16382 the base type is signed. */
16384 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
16385 if (low
.kind
== PROP_CONST
16386 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
16387 low
.data
.const_val
|= negative_mask
;
16388 if (high
.kind
== PROP_CONST
16389 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
16390 high
.data
.const_val
|= negative_mask
;
16392 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
16394 if (high_bound_is_count
)
16395 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
16397 /* Ada expects an empty array on no boundary attributes. */
16398 if (attr
== NULL
&& cu
->language
!= language_ada
)
16399 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
16401 name
= dwarf2_name (die
, cu
);
16403 TYPE_NAME (range_type
) = name
;
16405 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16407 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
16409 set_die_type (die
, range_type
, cu
);
16411 /* set_die_type should be already done. */
16412 set_descriptive_type (range_type
, die
, cu
);
16417 static struct type
*
16418 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16422 /* For now, we only support the C meaning of an unspecified type: void. */
16424 type
= init_type (cu
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
16425 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
16427 return set_die_type (die
, type
, cu
);
16430 /* Read a single die and all its descendents. Set the die's sibling
16431 field to NULL; set other fields in the die correctly, and set all
16432 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
16433 location of the info_ptr after reading all of those dies. PARENT
16434 is the parent of the die in question. */
16436 static struct die_info
*
16437 read_die_and_children (const struct die_reader_specs
*reader
,
16438 const gdb_byte
*info_ptr
,
16439 const gdb_byte
**new_info_ptr
,
16440 struct die_info
*parent
)
16442 struct die_info
*die
;
16443 const gdb_byte
*cur_ptr
;
16446 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
16449 *new_info_ptr
= cur_ptr
;
16452 store_in_ref_table (die
, reader
->cu
);
16455 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
16459 *new_info_ptr
= cur_ptr
;
16462 die
->sibling
= NULL
;
16463 die
->parent
= parent
;
16467 /* Read a die, all of its descendents, and all of its siblings; set
16468 all of the fields of all of the dies correctly. Arguments are as
16469 in read_die_and_children. */
16471 static struct die_info
*
16472 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
16473 const gdb_byte
*info_ptr
,
16474 const gdb_byte
**new_info_ptr
,
16475 struct die_info
*parent
)
16477 struct die_info
*first_die
, *last_sibling
;
16478 const gdb_byte
*cur_ptr
;
16480 cur_ptr
= info_ptr
;
16481 first_die
= last_sibling
= NULL
;
16485 struct die_info
*die
16486 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
16490 *new_info_ptr
= cur_ptr
;
16497 last_sibling
->sibling
= die
;
16499 last_sibling
= die
;
16503 /* Read a die, all of its descendents, and all of its siblings; set
16504 all of the fields of all of the dies correctly. Arguments are as
16505 in read_die_and_children.
16506 This the main entry point for reading a DIE and all its children. */
16508 static struct die_info
*
16509 read_die_and_siblings (const struct die_reader_specs
*reader
,
16510 const gdb_byte
*info_ptr
,
16511 const gdb_byte
**new_info_ptr
,
16512 struct die_info
*parent
)
16514 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
16515 new_info_ptr
, parent
);
16517 if (dwarf_die_debug
)
16519 fprintf_unfiltered (gdb_stdlog
,
16520 "Read die from %s@0x%x of %s:\n",
16521 get_section_name (reader
->die_section
),
16522 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
16523 bfd_get_filename (reader
->abfd
));
16524 dump_die (die
, dwarf_die_debug
);
16530 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
16532 The caller is responsible for filling in the extra attributes
16533 and updating (*DIEP)->num_attrs.
16534 Set DIEP to point to a newly allocated die with its information,
16535 except for its child, sibling, and parent fields.
16536 Set HAS_CHILDREN to tell whether the die has children or not. */
16538 static const gdb_byte
*
16539 read_full_die_1 (const struct die_reader_specs
*reader
,
16540 struct die_info
**diep
, const gdb_byte
*info_ptr
,
16541 int *has_children
, int num_extra_attrs
)
16543 unsigned int abbrev_number
, bytes_read
, i
;
16544 struct abbrev_info
*abbrev
;
16545 struct die_info
*die
;
16546 struct dwarf2_cu
*cu
= reader
->cu
;
16547 bfd
*abfd
= reader
->abfd
;
16549 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
16550 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16551 info_ptr
+= bytes_read
;
16552 if (!abbrev_number
)
16559 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
16561 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
16563 bfd_get_filename (abfd
));
16565 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
16566 die
->sect_off
= sect_off
;
16567 die
->tag
= abbrev
->tag
;
16568 die
->abbrev
= abbrev_number
;
16570 /* Make the result usable.
16571 The caller needs to update num_attrs after adding the extra
16573 die
->num_attrs
= abbrev
->num_attrs
;
16575 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
16576 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
16580 *has_children
= abbrev
->has_children
;
16584 /* Read a die and all its attributes.
16585 Set DIEP to point to a newly allocated die with its information,
16586 except for its child, sibling, and parent fields.
16587 Set HAS_CHILDREN to tell whether the die has children or not. */
16589 static const gdb_byte
*
16590 read_full_die (const struct die_reader_specs
*reader
,
16591 struct die_info
**diep
, const gdb_byte
*info_ptr
,
16594 const gdb_byte
*result
;
16596 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
16598 if (dwarf_die_debug
)
16600 fprintf_unfiltered (gdb_stdlog
,
16601 "Read die from %s@0x%x of %s:\n",
16602 get_section_name (reader
->die_section
),
16603 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
16604 bfd_get_filename (reader
->abfd
));
16605 dump_die (*diep
, dwarf_die_debug
);
16611 /* Abbreviation tables.
16613 In DWARF version 2, the description of the debugging information is
16614 stored in a separate .debug_abbrev section. Before we read any
16615 dies from a section we read in all abbreviations and install them
16616 in a hash table. */
16618 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
16620 static struct abbrev_info
*
16621 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
16623 struct abbrev_info
*abbrev
;
16625 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
16626 memset (abbrev
, 0, sizeof (struct abbrev_info
));
16631 /* Add an abbreviation to the table. */
16634 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
16635 unsigned int abbrev_number
,
16636 struct abbrev_info
*abbrev
)
16638 unsigned int hash_number
;
16640 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
16641 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
16642 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
16645 /* Look up an abbrev in the table.
16646 Returns NULL if the abbrev is not found. */
16648 static struct abbrev_info
*
16649 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
16650 unsigned int abbrev_number
)
16652 unsigned int hash_number
;
16653 struct abbrev_info
*abbrev
;
16655 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
16656 abbrev
= abbrev_table
->abbrevs
[hash_number
];
16660 if (abbrev
->number
== abbrev_number
)
16662 abbrev
= abbrev
->next
;
16667 /* Read in an abbrev table. */
16669 static struct abbrev_table
*
16670 abbrev_table_read_table (struct dwarf2_section_info
*section
,
16671 sect_offset sect_off
)
16673 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16674 bfd
*abfd
= get_section_bfd_owner (section
);
16675 struct abbrev_table
*abbrev_table
;
16676 const gdb_byte
*abbrev_ptr
;
16677 struct abbrev_info
*cur_abbrev
;
16678 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
16679 unsigned int abbrev_form
;
16680 struct attr_abbrev
*cur_attrs
;
16681 unsigned int allocated_attrs
;
16683 abbrev_table
= XNEW (struct abbrev_table
);
16684 abbrev_table
->sect_off
= sect_off
;
16685 obstack_init (&abbrev_table
->abbrev_obstack
);
16686 abbrev_table
->abbrevs
=
16687 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
16689 memset (abbrev_table
->abbrevs
, 0,
16690 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
16692 dwarf2_read_section (objfile
, section
);
16693 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
16694 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16695 abbrev_ptr
+= bytes_read
;
16697 allocated_attrs
= ATTR_ALLOC_CHUNK
;
16698 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
16700 /* Loop until we reach an abbrev number of 0. */
16701 while (abbrev_number
)
16703 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
16705 /* read in abbrev header */
16706 cur_abbrev
->number
= abbrev_number
;
16708 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16709 abbrev_ptr
+= bytes_read
;
16710 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
16713 /* now read in declarations */
16716 LONGEST implicit_const
;
16718 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16719 abbrev_ptr
+= bytes_read
;
16720 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16721 abbrev_ptr
+= bytes_read
;
16722 if (abbrev_form
== DW_FORM_implicit_const
)
16724 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
16726 abbrev_ptr
+= bytes_read
;
16730 /* Initialize it due to a false compiler warning. */
16731 implicit_const
= -1;
16734 if (abbrev_name
== 0)
16737 if (cur_abbrev
->num_attrs
== allocated_attrs
)
16739 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
16741 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
16744 cur_attrs
[cur_abbrev
->num_attrs
].name
16745 = (enum dwarf_attribute
) abbrev_name
;
16746 cur_attrs
[cur_abbrev
->num_attrs
].form
16747 = (enum dwarf_form
) abbrev_form
;
16748 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
16749 ++cur_abbrev
->num_attrs
;
16752 cur_abbrev
->attrs
=
16753 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
16754 cur_abbrev
->num_attrs
);
16755 memcpy (cur_abbrev
->attrs
, cur_attrs
,
16756 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
16758 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
16760 /* Get next abbreviation.
16761 Under Irix6 the abbreviations for a compilation unit are not
16762 always properly terminated with an abbrev number of 0.
16763 Exit loop if we encounter an abbreviation which we have
16764 already read (which means we are about to read the abbreviations
16765 for the next compile unit) or if the end of the abbreviation
16766 table is reached. */
16767 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
16769 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16770 abbrev_ptr
+= bytes_read
;
16771 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
16776 return abbrev_table
;
16779 /* Free the resources held by ABBREV_TABLE. */
16782 abbrev_table_free (struct abbrev_table
*abbrev_table
)
16784 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
16785 xfree (abbrev_table
);
16788 /* Same as abbrev_table_free but as a cleanup.
16789 We pass in a pointer to the pointer to the table so that we can
16790 set the pointer to NULL when we're done. It also simplifies
16791 build_type_psymtabs_1. */
16794 abbrev_table_free_cleanup (void *table_ptr
)
16796 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
16798 if (*abbrev_table_ptr
!= NULL
)
16799 abbrev_table_free (*abbrev_table_ptr
);
16800 *abbrev_table_ptr
= NULL
;
16803 /* Read the abbrev table for CU from ABBREV_SECTION. */
16806 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
16807 struct dwarf2_section_info
*abbrev_section
)
16810 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_sect_off
);
16813 /* Release the memory used by the abbrev table for a compilation unit. */
16816 dwarf2_free_abbrev_table (void *ptr_to_cu
)
16818 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
16820 if (cu
->abbrev_table
!= NULL
)
16821 abbrev_table_free (cu
->abbrev_table
);
16822 /* Set this to NULL so that we SEGV if we try to read it later,
16823 and also because free_comp_unit verifies this is NULL. */
16824 cu
->abbrev_table
= NULL
;
16827 /* Returns nonzero if TAG represents a type that we might generate a partial
16831 is_type_tag_for_partial (int tag
)
16836 /* Some types that would be reasonable to generate partial symbols for,
16837 that we don't at present. */
16838 case DW_TAG_array_type
:
16839 case DW_TAG_file_type
:
16840 case DW_TAG_ptr_to_member_type
:
16841 case DW_TAG_set_type
:
16842 case DW_TAG_string_type
:
16843 case DW_TAG_subroutine_type
:
16845 case DW_TAG_base_type
:
16846 case DW_TAG_class_type
:
16847 case DW_TAG_interface_type
:
16848 case DW_TAG_enumeration_type
:
16849 case DW_TAG_structure_type
:
16850 case DW_TAG_subrange_type
:
16851 case DW_TAG_typedef
:
16852 case DW_TAG_union_type
:
16859 /* Load all DIEs that are interesting for partial symbols into memory. */
16861 static struct partial_die_info
*
16862 load_partial_dies (const struct die_reader_specs
*reader
,
16863 const gdb_byte
*info_ptr
, int building_psymtab
)
16865 struct dwarf2_cu
*cu
= reader
->cu
;
16866 struct objfile
*objfile
= cu
->objfile
;
16867 struct partial_die_info
*part_die
;
16868 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
16869 struct abbrev_info
*abbrev
;
16870 unsigned int bytes_read
;
16871 unsigned int load_all
= 0;
16872 int nesting_level
= 1;
16877 gdb_assert (cu
->per_cu
!= NULL
);
16878 if (cu
->per_cu
->load_all_dies
)
16882 = htab_create_alloc_ex (cu
->header
.length
/ 12,
16886 &cu
->comp_unit_obstack
,
16887 hashtab_obstack_allocate
,
16888 dummy_obstack_deallocate
);
16890 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
16894 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
16896 /* A NULL abbrev means the end of a series of children. */
16897 if (abbrev
== NULL
)
16899 if (--nesting_level
== 0)
16901 /* PART_DIE was probably the last thing allocated on the
16902 comp_unit_obstack, so we could call obstack_free
16903 here. We don't do that because the waste is small,
16904 and will be cleaned up when we're done with this
16905 compilation unit. This way, we're also more robust
16906 against other users of the comp_unit_obstack. */
16909 info_ptr
+= bytes_read
;
16910 last_die
= parent_die
;
16911 parent_die
= parent_die
->die_parent
;
16915 /* Check for template arguments. We never save these; if
16916 they're seen, we just mark the parent, and go on our way. */
16917 if (parent_die
!= NULL
16918 && cu
->language
== language_cplus
16919 && (abbrev
->tag
== DW_TAG_template_type_param
16920 || abbrev
->tag
== DW_TAG_template_value_param
))
16922 parent_die
->has_template_arguments
= 1;
16926 /* We don't need a partial DIE for the template argument. */
16927 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16932 /* We only recurse into c++ subprograms looking for template arguments.
16933 Skip their other children. */
16935 && cu
->language
== language_cplus
16936 && parent_die
!= NULL
16937 && parent_die
->tag
== DW_TAG_subprogram
)
16939 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16943 /* Check whether this DIE is interesting enough to save. Normally
16944 we would not be interested in members here, but there may be
16945 later variables referencing them via DW_AT_specification (for
16946 static members). */
16948 && !is_type_tag_for_partial (abbrev
->tag
)
16949 && abbrev
->tag
!= DW_TAG_constant
16950 && abbrev
->tag
!= DW_TAG_enumerator
16951 && abbrev
->tag
!= DW_TAG_subprogram
16952 && abbrev
->tag
!= DW_TAG_lexical_block
16953 && abbrev
->tag
!= DW_TAG_variable
16954 && abbrev
->tag
!= DW_TAG_namespace
16955 && abbrev
->tag
!= DW_TAG_module
16956 && abbrev
->tag
!= DW_TAG_member
16957 && abbrev
->tag
!= DW_TAG_imported_unit
16958 && abbrev
->tag
!= DW_TAG_imported_declaration
)
16960 /* Otherwise we skip to the next sibling, if any. */
16961 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16965 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
16968 /* This two-pass algorithm for processing partial symbols has a
16969 high cost in cache pressure. Thus, handle some simple cases
16970 here which cover the majority of C partial symbols. DIEs
16971 which neither have specification tags in them, nor could have
16972 specification tags elsewhere pointing at them, can simply be
16973 processed and discarded.
16975 This segment is also optional; scan_partial_symbols and
16976 add_partial_symbol will handle these DIEs if we chain
16977 them in normally. When compilers which do not emit large
16978 quantities of duplicate debug information are more common,
16979 this code can probably be removed. */
16981 /* Any complete simple types at the top level (pretty much all
16982 of them, for a language without namespaces), can be processed
16984 if (parent_die
== NULL
16985 && part_die
->has_specification
== 0
16986 && part_die
->is_declaration
== 0
16987 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
16988 || part_die
->tag
== DW_TAG_base_type
16989 || part_die
->tag
== DW_TAG_subrange_type
))
16991 if (building_psymtab
&& part_die
->name
!= NULL
)
16992 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
16993 VAR_DOMAIN
, LOC_TYPEDEF
,
16994 &objfile
->static_psymbols
,
16995 0, cu
->language
, objfile
);
16996 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
17000 /* The exception for DW_TAG_typedef with has_children above is
17001 a workaround of GCC PR debug/47510. In the case of this complaint
17002 type_name_no_tag_or_error will error on such types later.
17004 GDB skipped children of DW_TAG_typedef by the shortcut above and then
17005 it could not find the child DIEs referenced later, this is checked
17006 above. In correct DWARF DW_TAG_typedef should have no children. */
17008 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
17009 complaint (&symfile_complaints
,
17010 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
17011 "- DIE at 0x%x [in module %s]"),
17012 to_underlying (part_die
->sect_off
), objfile_name (objfile
));
17014 /* If we're at the second level, and we're an enumerator, and
17015 our parent has no specification (meaning possibly lives in a
17016 namespace elsewhere), then we can add the partial symbol now
17017 instead of queueing it. */
17018 if (part_die
->tag
== DW_TAG_enumerator
17019 && parent_die
!= NULL
17020 && parent_die
->die_parent
== NULL
17021 && parent_die
->tag
== DW_TAG_enumeration_type
17022 && parent_die
->has_specification
== 0)
17024 if (part_die
->name
== NULL
)
17025 complaint (&symfile_complaints
,
17026 _("malformed enumerator DIE ignored"));
17027 else if (building_psymtab
)
17028 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
17029 VAR_DOMAIN
, LOC_CONST
,
17030 cu
->language
== language_cplus
17031 ? &objfile
->global_psymbols
17032 : &objfile
->static_psymbols
,
17033 0, cu
->language
, objfile
);
17035 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
17039 /* We'll save this DIE so link it in. */
17040 part_die
->die_parent
= parent_die
;
17041 part_die
->die_sibling
= NULL
;
17042 part_die
->die_child
= NULL
;
17044 if (last_die
&& last_die
== parent_die
)
17045 last_die
->die_child
= part_die
;
17047 last_die
->die_sibling
= part_die
;
17049 last_die
= part_die
;
17051 if (first_die
== NULL
)
17052 first_die
= part_die
;
17054 /* Maybe add the DIE to the hash table. Not all DIEs that we
17055 find interesting need to be in the hash table, because we
17056 also have the parent/sibling/child chains; only those that we
17057 might refer to by offset later during partial symbol reading.
17059 For now this means things that might have be the target of a
17060 DW_AT_specification, DW_AT_abstract_origin, or
17061 DW_AT_extension. DW_AT_extension will refer only to
17062 namespaces; DW_AT_abstract_origin refers to functions (and
17063 many things under the function DIE, but we do not recurse
17064 into function DIEs during partial symbol reading) and
17065 possibly variables as well; DW_AT_specification refers to
17066 declarations. Declarations ought to have the DW_AT_declaration
17067 flag. It happens that GCC forgets to put it in sometimes, but
17068 only for functions, not for types.
17070 Adding more things than necessary to the hash table is harmless
17071 except for the performance cost. Adding too few will result in
17072 wasted time in find_partial_die, when we reread the compilation
17073 unit with load_all_dies set. */
17076 || abbrev
->tag
== DW_TAG_constant
17077 || abbrev
->tag
== DW_TAG_subprogram
17078 || abbrev
->tag
== DW_TAG_variable
17079 || abbrev
->tag
== DW_TAG_namespace
17080 || part_die
->is_declaration
)
17084 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
17085 to_underlying (part_die
->sect_off
),
17090 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
17092 /* For some DIEs we want to follow their children (if any). For C
17093 we have no reason to follow the children of structures; for other
17094 languages we have to, so that we can get at method physnames
17095 to infer fully qualified class names, for DW_AT_specification,
17096 and for C++ template arguments. For C++, we also look one level
17097 inside functions to find template arguments (if the name of the
17098 function does not already contain the template arguments).
17100 For Ada, we need to scan the children of subprograms and lexical
17101 blocks as well because Ada allows the definition of nested
17102 entities that could be interesting for the debugger, such as
17103 nested subprograms for instance. */
17104 if (last_die
->has_children
17106 || last_die
->tag
== DW_TAG_namespace
17107 || last_die
->tag
== DW_TAG_module
17108 || last_die
->tag
== DW_TAG_enumeration_type
17109 || (cu
->language
== language_cplus
17110 && last_die
->tag
== DW_TAG_subprogram
17111 && (last_die
->name
== NULL
17112 || strchr (last_die
->name
, '<') == NULL
))
17113 || (cu
->language
!= language_c
17114 && (last_die
->tag
== DW_TAG_class_type
17115 || last_die
->tag
== DW_TAG_interface_type
17116 || last_die
->tag
== DW_TAG_structure_type
17117 || last_die
->tag
== DW_TAG_union_type
))
17118 || (cu
->language
== language_ada
17119 && (last_die
->tag
== DW_TAG_subprogram
17120 || last_die
->tag
== DW_TAG_lexical_block
))))
17123 parent_die
= last_die
;
17127 /* Otherwise we skip to the next sibling, if any. */
17128 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
17130 /* Back to the top, do it again. */
17134 /* Read a minimal amount of information into the minimal die structure. */
17136 static const gdb_byte
*
17137 read_partial_die (const struct die_reader_specs
*reader
,
17138 struct partial_die_info
*part_die
,
17139 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
17140 const gdb_byte
*info_ptr
)
17142 struct dwarf2_cu
*cu
= reader
->cu
;
17143 struct objfile
*objfile
= cu
->objfile
;
17144 const gdb_byte
*buffer
= reader
->buffer
;
17146 struct attribute attr
;
17147 int has_low_pc_attr
= 0;
17148 int has_high_pc_attr
= 0;
17149 int high_pc_relative
= 0;
17151 memset (part_die
, 0, sizeof (struct partial_die_info
));
17153 part_die
->sect_off
= (sect_offset
) (info_ptr
- buffer
);
17155 info_ptr
+= abbrev_len
;
17157 if (abbrev
== NULL
)
17160 part_die
->tag
= abbrev
->tag
;
17161 part_die
->has_children
= abbrev
->has_children
;
17163 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17165 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
17167 /* Store the data if it is of an attribute we want to keep in a
17168 partial symbol table. */
17172 switch (part_die
->tag
)
17174 case DW_TAG_compile_unit
:
17175 case DW_TAG_partial_unit
:
17176 case DW_TAG_type_unit
:
17177 /* Compilation units have a DW_AT_name that is a filename, not
17178 a source language identifier. */
17179 case DW_TAG_enumeration_type
:
17180 case DW_TAG_enumerator
:
17181 /* These tags always have simple identifiers already; no need
17182 to canonicalize them. */
17183 part_die
->name
= DW_STRING (&attr
);
17187 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
17188 &objfile
->per_bfd
->storage_obstack
);
17192 case DW_AT_linkage_name
:
17193 case DW_AT_MIPS_linkage_name
:
17194 /* Note that both forms of linkage name might appear. We
17195 assume they will be the same, and we only store the last
17197 if (cu
->language
== language_ada
)
17198 part_die
->name
= DW_STRING (&attr
);
17199 part_die
->linkage_name
= DW_STRING (&attr
);
17202 has_low_pc_attr
= 1;
17203 part_die
->lowpc
= attr_value_as_address (&attr
);
17205 case DW_AT_high_pc
:
17206 has_high_pc_attr
= 1;
17207 part_die
->highpc
= attr_value_as_address (&attr
);
17208 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
17209 high_pc_relative
= 1;
17211 case DW_AT_location
:
17212 /* Support the .debug_loc offsets. */
17213 if (attr_form_is_block (&attr
))
17215 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
17217 else if (attr_form_is_section_offset (&attr
))
17219 dwarf2_complex_location_expr_complaint ();
17223 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17224 "partial symbol information");
17227 case DW_AT_external
:
17228 part_die
->is_external
= DW_UNSND (&attr
);
17230 case DW_AT_declaration
:
17231 part_die
->is_declaration
= DW_UNSND (&attr
);
17234 part_die
->has_type
= 1;
17236 case DW_AT_abstract_origin
:
17237 case DW_AT_specification
:
17238 case DW_AT_extension
:
17239 part_die
->has_specification
= 1;
17240 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
17241 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
17242 || cu
->per_cu
->is_dwz
);
17244 case DW_AT_sibling
:
17245 /* Ignore absolute siblings, they might point outside of
17246 the current compile unit. */
17247 if (attr
.form
== DW_FORM_ref_addr
)
17248 complaint (&symfile_complaints
,
17249 _("ignoring absolute DW_AT_sibling"));
17252 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
17253 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
17255 if (sibling_ptr
< info_ptr
)
17256 complaint (&symfile_complaints
,
17257 _("DW_AT_sibling points backwards"));
17258 else if (sibling_ptr
> reader
->buffer_end
)
17259 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
17261 part_die
->sibling
= sibling_ptr
;
17264 case DW_AT_byte_size
:
17265 part_die
->has_byte_size
= 1;
17267 case DW_AT_const_value
:
17268 part_die
->has_const_value
= 1;
17270 case DW_AT_calling_convention
:
17271 /* DWARF doesn't provide a way to identify a program's source-level
17272 entry point. DW_AT_calling_convention attributes are only meant
17273 to describe functions' calling conventions.
17275 However, because it's a necessary piece of information in
17276 Fortran, and before DWARF 4 DW_CC_program was the only
17277 piece of debugging information whose definition refers to
17278 a 'main program' at all, several compilers marked Fortran
17279 main programs with DW_CC_program --- even when those
17280 functions use the standard calling conventions.
17282 Although DWARF now specifies a way to provide this
17283 information, we support this practice for backward
17285 if (DW_UNSND (&attr
) == DW_CC_program
17286 && cu
->language
== language_fortran
)
17287 part_die
->main_subprogram
= 1;
17290 if (DW_UNSND (&attr
) == DW_INL_inlined
17291 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
17292 part_die
->may_be_inlined
= 1;
17296 if (part_die
->tag
== DW_TAG_imported_unit
)
17298 part_die
->d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
17299 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
17300 || cu
->per_cu
->is_dwz
);
17304 case DW_AT_main_subprogram
:
17305 part_die
->main_subprogram
= DW_UNSND (&attr
);
17313 if (high_pc_relative
)
17314 part_die
->highpc
+= part_die
->lowpc
;
17316 if (has_low_pc_attr
&& has_high_pc_attr
)
17318 /* When using the GNU linker, .gnu.linkonce. sections are used to
17319 eliminate duplicate copies of functions and vtables and such.
17320 The linker will arbitrarily choose one and discard the others.
17321 The AT_*_pc values for such functions refer to local labels in
17322 these sections. If the section from that file was discarded, the
17323 labels are not in the output, so the relocs get a value of 0.
17324 If this is a discarded function, mark the pc bounds as invalid,
17325 so that GDB will ignore it. */
17326 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
17328 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17330 complaint (&symfile_complaints
,
17331 _("DW_AT_low_pc %s is zero "
17332 "for DIE at 0x%x [in module %s]"),
17333 paddress (gdbarch
, part_die
->lowpc
),
17334 to_underlying (part_die
->sect_off
), objfile_name (objfile
));
17336 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
17337 else if (part_die
->lowpc
>= part_die
->highpc
)
17339 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17341 complaint (&symfile_complaints
,
17342 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
17343 "for DIE at 0x%x [in module %s]"),
17344 paddress (gdbarch
, part_die
->lowpc
),
17345 paddress (gdbarch
, part_die
->highpc
),
17346 to_underlying (part_die
->sect_off
),
17347 objfile_name (objfile
));
17350 part_die
->has_pc_info
= 1;
17356 /* Find a cached partial DIE at OFFSET in CU. */
17358 static struct partial_die_info
*
17359 find_partial_die_in_comp_unit (sect_offset sect_off
, struct dwarf2_cu
*cu
)
17361 struct partial_die_info
*lookup_die
= NULL
;
17362 struct partial_die_info part_die
;
17364 part_die
.sect_off
= sect_off
;
17365 lookup_die
= ((struct partial_die_info
*)
17366 htab_find_with_hash (cu
->partial_dies
, &part_die
,
17367 to_underlying (sect_off
)));
17372 /* Find a partial DIE at OFFSET, which may or may not be in CU,
17373 except in the case of .debug_types DIEs which do not reference
17374 outside their CU (they do however referencing other types via
17375 DW_FORM_ref_sig8). */
17377 static struct partial_die_info
*
17378 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
17380 struct objfile
*objfile
= cu
->objfile
;
17381 struct dwarf2_per_cu_data
*per_cu
= NULL
;
17382 struct partial_die_info
*pd
= NULL
;
17384 if (offset_in_dwz
== cu
->per_cu
->is_dwz
17385 && offset_in_cu_p (&cu
->header
, sect_off
))
17387 pd
= find_partial_die_in_comp_unit (sect_off
, cu
);
17390 /* We missed recording what we needed.
17391 Load all dies and try again. */
17392 per_cu
= cu
->per_cu
;
17396 /* TUs don't reference other CUs/TUs (except via type signatures). */
17397 if (cu
->per_cu
->is_debug_types
)
17399 error (_("Dwarf Error: Type Unit at offset 0x%x contains"
17400 " external reference to offset 0x%x [in module %s].\n"),
17401 to_underlying (cu
->header
.sect_off
), to_underlying (sect_off
),
17402 bfd_get_filename (objfile
->obfd
));
17404 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
17407 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
17408 load_partial_comp_unit (per_cu
);
17410 per_cu
->cu
->last_used
= 0;
17411 pd
= find_partial_die_in_comp_unit (sect_off
, per_cu
->cu
);
17414 /* If we didn't find it, and not all dies have been loaded,
17415 load them all and try again. */
17417 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
17419 per_cu
->load_all_dies
= 1;
17421 /* This is nasty. When we reread the DIEs, somewhere up the call chain
17422 THIS_CU->cu may already be in use. So we can't just free it and
17423 replace its DIEs with the ones we read in. Instead, we leave those
17424 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
17425 and clobber THIS_CU->cu->partial_dies with the hash table for the new
17427 load_partial_comp_unit (per_cu
);
17429 pd
= find_partial_die_in_comp_unit (sect_off
, per_cu
->cu
);
17433 internal_error (__FILE__
, __LINE__
,
17434 _("could not find partial DIE 0x%x "
17435 "in cache [from module %s]\n"),
17436 to_underlying (sect_off
), bfd_get_filename (objfile
->obfd
));
17440 /* See if we can figure out if the class lives in a namespace. We do
17441 this by looking for a member function; its demangled name will
17442 contain namespace info, if there is any. */
17445 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
17446 struct dwarf2_cu
*cu
)
17448 /* NOTE: carlton/2003-10-07: Getting the info this way changes
17449 what template types look like, because the demangler
17450 frequently doesn't give the same name as the debug info. We
17451 could fix this by only using the demangled name to get the
17452 prefix (but see comment in read_structure_type). */
17454 struct partial_die_info
*real_pdi
;
17455 struct partial_die_info
*child_pdi
;
17457 /* If this DIE (this DIE's specification, if any) has a parent, then
17458 we should not do this. We'll prepend the parent's fully qualified
17459 name when we create the partial symbol. */
17461 real_pdi
= struct_pdi
;
17462 while (real_pdi
->has_specification
)
17463 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
17464 real_pdi
->spec_is_dwz
, cu
);
17466 if (real_pdi
->die_parent
!= NULL
)
17469 for (child_pdi
= struct_pdi
->die_child
;
17471 child_pdi
= child_pdi
->die_sibling
)
17473 if (child_pdi
->tag
== DW_TAG_subprogram
17474 && child_pdi
->linkage_name
!= NULL
)
17476 char *actual_class_name
17477 = language_class_name_from_physname (cu
->language_defn
,
17478 child_pdi
->linkage_name
);
17479 if (actual_class_name
!= NULL
)
17483 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
17485 strlen (actual_class_name
)));
17486 xfree (actual_class_name
);
17493 /* Adjust PART_DIE before generating a symbol for it. This function
17494 may set the is_external flag or change the DIE's name. */
17497 fixup_partial_die (struct partial_die_info
*part_die
,
17498 struct dwarf2_cu
*cu
)
17500 /* Once we've fixed up a die, there's no point in doing so again.
17501 This also avoids a memory leak if we were to call
17502 guess_partial_die_structure_name multiple times. */
17503 if (part_die
->fixup_called
)
17506 /* If we found a reference attribute and the DIE has no name, try
17507 to find a name in the referred to DIE. */
17509 if (part_die
->name
== NULL
&& part_die
->has_specification
)
17511 struct partial_die_info
*spec_die
;
17513 spec_die
= find_partial_die (part_die
->spec_offset
,
17514 part_die
->spec_is_dwz
, cu
);
17516 fixup_partial_die (spec_die
, cu
);
17518 if (spec_die
->name
)
17520 part_die
->name
= spec_die
->name
;
17522 /* Copy DW_AT_external attribute if it is set. */
17523 if (spec_die
->is_external
)
17524 part_die
->is_external
= spec_die
->is_external
;
17528 /* Set default names for some unnamed DIEs. */
17530 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
17531 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
17533 /* If there is no parent die to provide a namespace, and there are
17534 children, see if we can determine the namespace from their linkage
17536 if (cu
->language
== language_cplus
17537 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
17538 && part_die
->die_parent
== NULL
17539 && part_die
->has_children
17540 && (part_die
->tag
== DW_TAG_class_type
17541 || part_die
->tag
== DW_TAG_structure_type
17542 || part_die
->tag
== DW_TAG_union_type
))
17543 guess_partial_die_structure_name (part_die
, cu
);
17545 /* GCC might emit a nameless struct or union that has a linkage
17546 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
17547 if (part_die
->name
== NULL
17548 && (part_die
->tag
== DW_TAG_class_type
17549 || part_die
->tag
== DW_TAG_interface_type
17550 || part_die
->tag
== DW_TAG_structure_type
17551 || part_die
->tag
== DW_TAG_union_type
)
17552 && part_die
->linkage_name
!= NULL
)
17556 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
17561 /* Strip any leading namespaces/classes, keep only the base name.
17562 DW_AT_name for named DIEs does not contain the prefixes. */
17563 base
= strrchr (demangled
, ':');
17564 if (base
&& base
> demangled
&& base
[-1] == ':')
17571 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
17572 base
, strlen (base
)));
17577 part_die
->fixup_called
= 1;
17580 /* Read an attribute value described by an attribute form. */
17582 static const gdb_byte
*
17583 read_attribute_value (const struct die_reader_specs
*reader
,
17584 struct attribute
*attr
, unsigned form
,
17585 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
17587 struct dwarf2_cu
*cu
= reader
->cu
;
17588 struct objfile
*objfile
= cu
->objfile
;
17589 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17590 bfd
*abfd
= reader
->abfd
;
17591 struct comp_unit_head
*cu_header
= &cu
->header
;
17592 unsigned int bytes_read
;
17593 struct dwarf_block
*blk
;
17595 attr
->form
= (enum dwarf_form
) form
;
17598 case DW_FORM_ref_addr
:
17599 if (cu
->header
.version
== 2)
17600 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
17602 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
17603 &cu
->header
, &bytes_read
);
17604 info_ptr
+= bytes_read
;
17606 case DW_FORM_GNU_ref_alt
:
17607 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
17608 info_ptr
+= bytes_read
;
17611 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
17612 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
17613 info_ptr
+= bytes_read
;
17615 case DW_FORM_block2
:
17616 blk
= dwarf_alloc_block (cu
);
17617 blk
->size
= read_2_bytes (abfd
, info_ptr
);
17619 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
17620 info_ptr
+= blk
->size
;
17621 DW_BLOCK (attr
) = blk
;
17623 case DW_FORM_block4
:
17624 blk
= dwarf_alloc_block (cu
);
17625 blk
->size
= read_4_bytes (abfd
, info_ptr
);
17627 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
17628 info_ptr
+= blk
->size
;
17629 DW_BLOCK (attr
) = blk
;
17631 case DW_FORM_data2
:
17632 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
17635 case DW_FORM_data4
:
17636 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
17639 case DW_FORM_data8
:
17640 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
17643 case DW_FORM_data16
:
17644 blk
= dwarf_alloc_block (cu
);
17646 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
17648 DW_BLOCK (attr
) = blk
;
17650 case DW_FORM_sec_offset
:
17651 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
17652 info_ptr
+= bytes_read
;
17654 case DW_FORM_string
:
17655 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
17656 DW_STRING_IS_CANONICAL (attr
) = 0;
17657 info_ptr
+= bytes_read
;
17660 if (!cu
->per_cu
->is_dwz
)
17662 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
17664 DW_STRING_IS_CANONICAL (attr
) = 0;
17665 info_ptr
+= bytes_read
;
17669 case DW_FORM_line_strp
:
17670 if (!cu
->per_cu
->is_dwz
)
17672 DW_STRING (attr
) = read_indirect_line_string (abfd
, info_ptr
,
17673 cu_header
, &bytes_read
);
17674 DW_STRING_IS_CANONICAL (attr
) = 0;
17675 info_ptr
+= bytes_read
;
17679 case DW_FORM_GNU_strp_alt
:
17681 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17682 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
17685 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
17686 DW_STRING_IS_CANONICAL (attr
) = 0;
17687 info_ptr
+= bytes_read
;
17690 case DW_FORM_exprloc
:
17691 case DW_FORM_block
:
17692 blk
= dwarf_alloc_block (cu
);
17693 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17694 info_ptr
+= bytes_read
;
17695 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
17696 info_ptr
+= blk
->size
;
17697 DW_BLOCK (attr
) = blk
;
17699 case DW_FORM_block1
:
17700 blk
= dwarf_alloc_block (cu
);
17701 blk
->size
= read_1_byte (abfd
, info_ptr
);
17703 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
17704 info_ptr
+= blk
->size
;
17705 DW_BLOCK (attr
) = blk
;
17707 case DW_FORM_data1
:
17708 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
17712 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
17715 case DW_FORM_flag_present
:
17716 DW_UNSND (attr
) = 1;
17718 case DW_FORM_sdata
:
17719 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
17720 info_ptr
+= bytes_read
;
17722 case DW_FORM_udata
:
17723 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17724 info_ptr
+= bytes_read
;
17727 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17728 + read_1_byte (abfd
, info_ptr
));
17732 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17733 + read_2_bytes (abfd
, info_ptr
));
17737 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17738 + read_4_bytes (abfd
, info_ptr
));
17742 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17743 + read_8_bytes (abfd
, info_ptr
));
17746 case DW_FORM_ref_sig8
:
17747 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
17750 case DW_FORM_ref_udata
:
17751 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17752 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
17753 info_ptr
+= bytes_read
;
17755 case DW_FORM_indirect
:
17756 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17757 info_ptr
+= bytes_read
;
17758 if (form
== DW_FORM_implicit_const
)
17760 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
17761 info_ptr
+= bytes_read
;
17763 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
17766 case DW_FORM_implicit_const
:
17767 DW_SND (attr
) = implicit_const
;
17769 case DW_FORM_GNU_addr_index
:
17770 if (reader
->dwo_file
== NULL
)
17772 /* For now flag a hard error.
17773 Later we can turn this into a complaint. */
17774 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
17775 dwarf_form_name (form
),
17776 bfd_get_filename (abfd
));
17778 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
17779 info_ptr
+= bytes_read
;
17781 case DW_FORM_GNU_str_index
:
17782 if (reader
->dwo_file
== NULL
)
17784 /* For now flag a hard error.
17785 Later we can turn this into a complaint if warranted. */
17786 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
17787 dwarf_form_name (form
),
17788 bfd_get_filename (abfd
));
17791 ULONGEST str_index
=
17792 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17794 DW_STRING (attr
) = read_str_index (reader
, str_index
);
17795 DW_STRING_IS_CANONICAL (attr
) = 0;
17796 info_ptr
+= bytes_read
;
17800 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
17801 dwarf_form_name (form
),
17802 bfd_get_filename (abfd
));
17806 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
17807 attr
->form
= DW_FORM_GNU_ref_alt
;
17809 /* We have seen instances where the compiler tried to emit a byte
17810 size attribute of -1 which ended up being encoded as an unsigned
17811 0xffffffff. Although 0xffffffff is technically a valid size value,
17812 an object of this size seems pretty unlikely so we can relatively
17813 safely treat these cases as if the size attribute was invalid and
17814 treat them as zero by default. */
17815 if (attr
->name
== DW_AT_byte_size
17816 && form
== DW_FORM_data4
17817 && DW_UNSND (attr
) >= 0xffffffff)
17820 (&symfile_complaints
,
17821 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
17822 hex_string (DW_UNSND (attr
)));
17823 DW_UNSND (attr
) = 0;
17829 /* Read an attribute described by an abbreviated attribute. */
17831 static const gdb_byte
*
17832 read_attribute (const struct die_reader_specs
*reader
,
17833 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
17834 const gdb_byte
*info_ptr
)
17836 attr
->name
= abbrev
->name
;
17837 return read_attribute_value (reader
, attr
, abbrev
->form
,
17838 abbrev
->implicit_const
, info_ptr
);
17841 /* Read dwarf information from a buffer. */
17843 static unsigned int
17844 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
17846 return bfd_get_8 (abfd
, buf
);
17850 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
17852 return bfd_get_signed_8 (abfd
, buf
);
17855 static unsigned int
17856 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17858 return bfd_get_16 (abfd
, buf
);
17862 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17864 return bfd_get_signed_16 (abfd
, buf
);
17867 static unsigned int
17868 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17870 return bfd_get_32 (abfd
, buf
);
17874 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17876 return bfd_get_signed_32 (abfd
, buf
);
17880 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17882 return bfd_get_64 (abfd
, buf
);
17886 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
17887 unsigned int *bytes_read
)
17889 struct comp_unit_head
*cu_header
= &cu
->header
;
17890 CORE_ADDR retval
= 0;
17892 if (cu_header
->signed_addr_p
)
17894 switch (cu_header
->addr_size
)
17897 retval
= bfd_get_signed_16 (abfd
, buf
);
17900 retval
= bfd_get_signed_32 (abfd
, buf
);
17903 retval
= bfd_get_signed_64 (abfd
, buf
);
17906 internal_error (__FILE__
, __LINE__
,
17907 _("read_address: bad switch, signed [in module %s]"),
17908 bfd_get_filename (abfd
));
17913 switch (cu_header
->addr_size
)
17916 retval
= bfd_get_16 (abfd
, buf
);
17919 retval
= bfd_get_32 (abfd
, buf
);
17922 retval
= bfd_get_64 (abfd
, buf
);
17925 internal_error (__FILE__
, __LINE__
,
17926 _("read_address: bad switch, "
17927 "unsigned [in module %s]"),
17928 bfd_get_filename (abfd
));
17932 *bytes_read
= cu_header
->addr_size
;
17936 /* Read the initial length from a section. The (draft) DWARF 3
17937 specification allows the initial length to take up either 4 bytes
17938 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
17939 bytes describe the length and all offsets will be 8 bytes in length
17942 An older, non-standard 64-bit format is also handled by this
17943 function. The older format in question stores the initial length
17944 as an 8-byte quantity without an escape value. Lengths greater
17945 than 2^32 aren't very common which means that the initial 4 bytes
17946 is almost always zero. Since a length value of zero doesn't make
17947 sense for the 32-bit format, this initial zero can be considered to
17948 be an escape value which indicates the presence of the older 64-bit
17949 format. As written, the code can't detect (old format) lengths
17950 greater than 4GB. If it becomes necessary to handle lengths
17951 somewhat larger than 4GB, we could allow other small values (such
17952 as the non-sensical values of 1, 2, and 3) to also be used as
17953 escape values indicating the presence of the old format.
17955 The value returned via bytes_read should be used to increment the
17956 relevant pointer after calling read_initial_length().
17958 [ Note: read_initial_length() and read_offset() are based on the
17959 document entitled "DWARF Debugging Information Format", revision
17960 3, draft 8, dated November 19, 2001. This document was obtained
17963 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
17965 This document is only a draft and is subject to change. (So beware.)
17967 Details regarding the older, non-standard 64-bit format were
17968 determined empirically by examining 64-bit ELF files produced by
17969 the SGI toolchain on an IRIX 6.5 machine.
17971 - Kevin, July 16, 2002
17975 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
17977 LONGEST length
= bfd_get_32 (abfd
, buf
);
17979 if (length
== 0xffffffff)
17981 length
= bfd_get_64 (abfd
, buf
+ 4);
17984 else if (length
== 0)
17986 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
17987 length
= bfd_get_64 (abfd
, buf
);
17998 /* Cover function for read_initial_length.
17999 Returns the length of the object at BUF, and stores the size of the
18000 initial length in *BYTES_READ and stores the size that offsets will be in
18002 If the initial length size is not equivalent to that specified in
18003 CU_HEADER then issue a complaint.
18004 This is useful when reading non-comp-unit headers. */
18007 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
18008 const struct comp_unit_head
*cu_header
,
18009 unsigned int *bytes_read
,
18010 unsigned int *offset_size
)
18012 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
18014 gdb_assert (cu_header
->initial_length_size
== 4
18015 || cu_header
->initial_length_size
== 8
18016 || cu_header
->initial_length_size
== 12);
18018 if (cu_header
->initial_length_size
!= *bytes_read
)
18019 complaint (&symfile_complaints
,
18020 _("intermixed 32-bit and 64-bit DWARF sections"));
18022 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
18026 /* Read an offset from the data stream. The size of the offset is
18027 given by cu_header->offset_size. */
18030 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
18031 const struct comp_unit_head
*cu_header
,
18032 unsigned int *bytes_read
)
18034 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
18036 *bytes_read
= cu_header
->offset_size
;
18040 /* Read an offset from the data stream. */
18043 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
18045 LONGEST retval
= 0;
18047 switch (offset_size
)
18050 retval
= bfd_get_32 (abfd
, buf
);
18053 retval
= bfd_get_64 (abfd
, buf
);
18056 internal_error (__FILE__
, __LINE__
,
18057 _("read_offset_1: bad switch [in module %s]"),
18058 bfd_get_filename (abfd
));
18064 static const gdb_byte
*
18065 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
18067 /* If the size of a host char is 8 bits, we can return a pointer
18068 to the buffer, otherwise we have to copy the data to a buffer
18069 allocated on the temporary obstack. */
18070 gdb_assert (HOST_CHAR_BIT
== 8);
18074 static const char *
18075 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
18076 unsigned int *bytes_read_ptr
)
18078 /* If the size of a host char is 8 bits, we can return a pointer
18079 to the string, otherwise we have to copy the string to a buffer
18080 allocated on the temporary obstack. */
18081 gdb_assert (HOST_CHAR_BIT
== 8);
18084 *bytes_read_ptr
= 1;
18087 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
18088 return (const char *) buf
;
18091 /* Return pointer to string at section SECT offset STR_OFFSET with error
18092 reporting strings FORM_NAME and SECT_NAME. */
18094 static const char *
18095 read_indirect_string_at_offset_from (bfd
*abfd
, LONGEST str_offset
,
18096 struct dwarf2_section_info
*sect
,
18097 const char *form_name
,
18098 const char *sect_name
)
18100 dwarf2_read_section (dwarf2_per_objfile
->objfile
, sect
);
18101 if (sect
->buffer
== NULL
)
18102 error (_("%s used without %s section [in module %s]"),
18103 form_name
, sect_name
, bfd_get_filename (abfd
));
18104 if (str_offset
>= sect
->size
)
18105 error (_("%s pointing outside of %s section [in module %s]"),
18106 form_name
, sect_name
, bfd_get_filename (abfd
));
18107 gdb_assert (HOST_CHAR_BIT
== 8);
18108 if (sect
->buffer
[str_offset
] == '\0')
18110 return (const char *) (sect
->buffer
+ str_offset
);
18113 /* Return pointer to string at .debug_str offset STR_OFFSET. */
18115 static const char *
18116 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
18118 return read_indirect_string_at_offset_from (abfd
, str_offset
,
18119 &dwarf2_per_objfile
->str
,
18120 "DW_FORM_strp", ".debug_str");
18123 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
18125 static const char *
18126 read_indirect_line_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
18128 return read_indirect_string_at_offset_from (abfd
, str_offset
,
18129 &dwarf2_per_objfile
->line_str
,
18130 "DW_FORM_line_strp",
18131 ".debug_line_str");
18134 /* Read a string at offset STR_OFFSET in the .debug_str section from
18135 the .dwz file DWZ. Throw an error if the offset is too large. If
18136 the string consists of a single NUL byte, return NULL; otherwise
18137 return a pointer to the string. */
18139 static const char *
18140 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
18142 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
18144 if (dwz
->str
.buffer
== NULL
)
18145 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
18146 "section [in module %s]"),
18147 bfd_get_filename (dwz
->dwz_bfd
));
18148 if (str_offset
>= dwz
->str
.size
)
18149 error (_("DW_FORM_GNU_strp_alt pointing outside of "
18150 ".debug_str section [in module %s]"),
18151 bfd_get_filename (dwz
->dwz_bfd
));
18152 gdb_assert (HOST_CHAR_BIT
== 8);
18153 if (dwz
->str
.buffer
[str_offset
] == '\0')
18155 return (const char *) (dwz
->str
.buffer
+ str_offset
);
18158 /* Return pointer to string at .debug_str offset as read from BUF.
18159 BUF is assumed to be in a compilation unit described by CU_HEADER.
18160 Return *BYTES_READ_PTR count of bytes read from BUF. */
18162 static const char *
18163 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
18164 const struct comp_unit_head
*cu_header
,
18165 unsigned int *bytes_read_ptr
)
18167 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
18169 return read_indirect_string_at_offset (abfd
, str_offset
);
18172 /* Return pointer to string at .debug_line_str offset as read from BUF.
18173 BUF is assumed to be in a compilation unit described by CU_HEADER.
18174 Return *BYTES_READ_PTR count of bytes read from BUF. */
18176 static const char *
18177 read_indirect_line_string (bfd
*abfd
, const gdb_byte
*buf
,
18178 const struct comp_unit_head
*cu_header
,
18179 unsigned int *bytes_read_ptr
)
18181 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
18183 return read_indirect_line_string_at_offset (abfd
, str_offset
);
18187 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
18188 unsigned int *bytes_read_ptr
)
18191 unsigned int num_read
;
18193 unsigned char byte
;
18200 byte
= bfd_get_8 (abfd
, buf
);
18203 result
|= ((ULONGEST
) (byte
& 127) << shift
);
18204 if ((byte
& 128) == 0)
18210 *bytes_read_ptr
= num_read
;
18215 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
18216 unsigned int *bytes_read_ptr
)
18219 int shift
, num_read
;
18220 unsigned char byte
;
18227 byte
= bfd_get_8 (abfd
, buf
);
18230 result
|= ((LONGEST
) (byte
& 127) << shift
);
18232 if ((byte
& 128) == 0)
18237 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
18238 result
|= -(((LONGEST
) 1) << shift
);
18239 *bytes_read_ptr
= num_read
;
18243 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
18244 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
18245 ADDR_SIZE is the size of addresses from the CU header. */
18248 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
18250 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18251 bfd
*abfd
= objfile
->obfd
;
18252 const gdb_byte
*info_ptr
;
18254 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
18255 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
18256 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
18257 objfile_name (objfile
));
18258 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
18259 error (_("DW_FORM_addr_index pointing outside of "
18260 ".debug_addr section [in module %s]"),
18261 objfile_name (objfile
));
18262 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
18263 + addr_base
+ addr_index
* addr_size
);
18264 if (addr_size
== 4)
18265 return bfd_get_32 (abfd
, info_ptr
);
18267 return bfd_get_64 (abfd
, info_ptr
);
18270 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
18273 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
18275 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
18278 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
18281 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
18282 unsigned int *bytes_read
)
18284 bfd
*abfd
= cu
->objfile
->obfd
;
18285 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
18287 return read_addr_index (cu
, addr_index
);
18290 /* Data structure to pass results from dwarf2_read_addr_index_reader
18291 back to dwarf2_read_addr_index. */
18293 struct dwarf2_read_addr_index_data
18295 ULONGEST addr_base
;
18299 /* die_reader_func for dwarf2_read_addr_index. */
18302 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
18303 const gdb_byte
*info_ptr
,
18304 struct die_info
*comp_unit_die
,
18308 struct dwarf2_cu
*cu
= reader
->cu
;
18309 struct dwarf2_read_addr_index_data
*aidata
=
18310 (struct dwarf2_read_addr_index_data
*) data
;
18312 aidata
->addr_base
= cu
->addr_base
;
18313 aidata
->addr_size
= cu
->header
.addr_size
;
18316 /* Given an index in .debug_addr, fetch the value.
18317 NOTE: This can be called during dwarf expression evaluation,
18318 long after the debug information has been read, and thus per_cu->cu
18319 may no longer exist. */
18322 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
18323 unsigned int addr_index
)
18325 struct objfile
*objfile
= per_cu
->objfile
;
18326 struct dwarf2_cu
*cu
= per_cu
->cu
;
18327 ULONGEST addr_base
;
18330 /* This is intended to be called from outside this file. */
18331 dw2_setup (objfile
);
18333 /* We need addr_base and addr_size.
18334 If we don't have PER_CU->cu, we have to get it.
18335 Nasty, but the alternative is storing the needed info in PER_CU,
18336 which at this point doesn't seem justified: it's not clear how frequently
18337 it would get used and it would increase the size of every PER_CU.
18338 Entry points like dwarf2_per_cu_addr_size do a similar thing
18339 so we're not in uncharted territory here.
18340 Alas we need to be a bit more complicated as addr_base is contained
18343 We don't need to read the entire CU(/TU).
18344 We just need the header and top level die.
18346 IWBN to use the aging mechanism to let us lazily later discard the CU.
18347 For now we skip this optimization. */
18351 addr_base
= cu
->addr_base
;
18352 addr_size
= cu
->header
.addr_size
;
18356 struct dwarf2_read_addr_index_data aidata
;
18358 /* Note: We can't use init_cutu_and_read_dies_simple here,
18359 we need addr_base. */
18360 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
18361 dwarf2_read_addr_index_reader
, &aidata
);
18362 addr_base
= aidata
.addr_base
;
18363 addr_size
= aidata
.addr_size
;
18366 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
18369 /* Given a DW_FORM_GNU_str_index, fetch the string.
18370 This is only used by the Fission support. */
18372 static const char *
18373 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
18375 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18376 const char *objf_name
= objfile_name (objfile
);
18377 bfd
*abfd
= objfile
->obfd
;
18378 struct dwarf2_cu
*cu
= reader
->cu
;
18379 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
18380 struct dwarf2_section_info
*str_offsets_section
=
18381 &reader
->dwo_file
->sections
.str_offsets
;
18382 const gdb_byte
*info_ptr
;
18383 ULONGEST str_offset
;
18384 static const char form_name
[] = "DW_FORM_GNU_str_index";
18386 dwarf2_read_section (objfile
, str_section
);
18387 dwarf2_read_section (objfile
, str_offsets_section
);
18388 if (str_section
->buffer
== NULL
)
18389 error (_("%s used without .debug_str.dwo section"
18390 " in CU at offset 0x%x [in module %s]"),
18391 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
18392 if (str_offsets_section
->buffer
== NULL
)
18393 error (_("%s used without .debug_str_offsets.dwo section"
18394 " in CU at offset 0x%x [in module %s]"),
18395 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
18396 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
18397 error (_("%s pointing outside of .debug_str_offsets.dwo"
18398 " section in CU at offset 0x%x [in module %s]"),
18399 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
18400 info_ptr
= (str_offsets_section
->buffer
18401 + str_index
* cu
->header
.offset_size
);
18402 if (cu
->header
.offset_size
== 4)
18403 str_offset
= bfd_get_32 (abfd
, info_ptr
);
18405 str_offset
= bfd_get_64 (abfd
, info_ptr
);
18406 if (str_offset
>= str_section
->size
)
18407 error (_("Offset from %s pointing outside of"
18408 " .debug_str.dwo section in CU at offset 0x%x [in module %s]"),
18409 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
18410 return (const char *) (str_section
->buffer
+ str_offset
);
18413 /* Return the length of an LEB128 number in BUF. */
18416 leb128_size (const gdb_byte
*buf
)
18418 const gdb_byte
*begin
= buf
;
18424 if ((byte
& 128) == 0)
18425 return buf
- begin
;
18430 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
18439 cu
->language
= language_c
;
18442 case DW_LANG_C_plus_plus
:
18443 case DW_LANG_C_plus_plus_11
:
18444 case DW_LANG_C_plus_plus_14
:
18445 cu
->language
= language_cplus
;
18448 cu
->language
= language_d
;
18450 case DW_LANG_Fortran77
:
18451 case DW_LANG_Fortran90
:
18452 case DW_LANG_Fortran95
:
18453 case DW_LANG_Fortran03
:
18454 case DW_LANG_Fortran08
:
18455 cu
->language
= language_fortran
;
18458 cu
->language
= language_go
;
18460 case DW_LANG_Mips_Assembler
:
18461 cu
->language
= language_asm
;
18463 case DW_LANG_Ada83
:
18464 case DW_LANG_Ada95
:
18465 cu
->language
= language_ada
;
18467 case DW_LANG_Modula2
:
18468 cu
->language
= language_m2
;
18470 case DW_LANG_Pascal83
:
18471 cu
->language
= language_pascal
;
18474 cu
->language
= language_objc
;
18477 case DW_LANG_Rust_old
:
18478 cu
->language
= language_rust
;
18480 case DW_LANG_Cobol74
:
18481 case DW_LANG_Cobol85
:
18483 cu
->language
= language_minimal
;
18486 cu
->language_defn
= language_def (cu
->language
);
18489 /* Return the named attribute or NULL if not there. */
18491 static struct attribute
*
18492 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
18497 struct attribute
*spec
= NULL
;
18499 for (i
= 0; i
< die
->num_attrs
; ++i
)
18501 if (die
->attrs
[i
].name
== name
)
18502 return &die
->attrs
[i
];
18503 if (die
->attrs
[i
].name
== DW_AT_specification
18504 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
18505 spec
= &die
->attrs
[i
];
18511 die
= follow_die_ref (die
, spec
, &cu
);
18517 /* Return the named attribute or NULL if not there,
18518 but do not follow DW_AT_specification, etc.
18519 This is for use in contexts where we're reading .debug_types dies.
18520 Following DW_AT_specification, DW_AT_abstract_origin will take us
18521 back up the chain, and we want to go down. */
18523 static struct attribute
*
18524 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
18528 for (i
= 0; i
< die
->num_attrs
; ++i
)
18529 if (die
->attrs
[i
].name
== name
)
18530 return &die
->attrs
[i
];
18535 /* Return the string associated with a string-typed attribute, or NULL if it
18536 is either not found or is of an incorrect type. */
18538 static const char *
18539 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
18541 struct attribute
*attr
;
18542 const char *str
= NULL
;
18544 attr
= dwarf2_attr (die
, name
, cu
);
18548 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
18549 || attr
->form
== DW_FORM_string
18550 || attr
->form
== DW_FORM_GNU_str_index
18551 || attr
->form
== DW_FORM_GNU_strp_alt
)
18552 str
= DW_STRING (attr
);
18554 complaint (&symfile_complaints
,
18555 _("string type expected for attribute %s for "
18556 "DIE at 0x%x in module %s"),
18557 dwarf_attr_name (name
), to_underlying (die
->sect_off
),
18558 objfile_name (cu
->objfile
));
18564 /* Return non-zero iff the attribute NAME is defined for the given DIE,
18565 and holds a non-zero value. This function should only be used for
18566 DW_FORM_flag or DW_FORM_flag_present attributes. */
18569 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
18571 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
18573 return (attr
&& DW_UNSND (attr
));
18577 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
18579 /* A DIE is a declaration if it has a DW_AT_declaration attribute
18580 which value is non-zero. However, we have to be careful with
18581 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
18582 (via dwarf2_flag_true_p) follows this attribute. So we may
18583 end up accidently finding a declaration attribute that belongs
18584 to a different DIE referenced by the specification attribute,
18585 even though the given DIE does not have a declaration attribute. */
18586 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
18587 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
18590 /* Return the die giving the specification for DIE, if there is
18591 one. *SPEC_CU is the CU containing DIE on input, and the CU
18592 containing the return value on output. If there is no
18593 specification, but there is an abstract origin, that is
18596 static struct die_info
*
18597 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
18599 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
18602 if (spec_attr
== NULL
)
18603 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
18605 if (spec_attr
== NULL
)
18608 return follow_die_ref (die
, spec_attr
, spec_cu
);
18611 /* Stub for free_line_header to match void * callback types. */
18614 free_line_header_voidp (void *arg
)
18616 struct line_header
*lh
= (struct line_header
*) arg
;
18622 line_header::add_include_dir (const char *include_dir
)
18624 if (dwarf_line_debug
>= 2)
18625 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
18626 include_dirs
.size () + 1, include_dir
);
18628 include_dirs
.push_back (include_dir
);
18632 line_header::add_file_name (const char *name
,
18634 unsigned int mod_time
,
18635 unsigned int length
)
18637 if (dwarf_line_debug
>= 2)
18638 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
18639 (unsigned) file_names
.size () + 1, name
);
18641 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
18644 /* A convenience function to find the proper .debug_line section for a CU. */
18646 static struct dwarf2_section_info
*
18647 get_debug_line_section (struct dwarf2_cu
*cu
)
18649 struct dwarf2_section_info
*section
;
18651 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
18653 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
18654 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
18655 else if (cu
->per_cu
->is_dwz
)
18657 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18659 section
= &dwz
->line
;
18662 section
= &dwarf2_per_objfile
->line
;
18667 /* Read directory or file name entry format, starting with byte of
18668 format count entries, ULEB128 pairs of entry formats, ULEB128 of
18669 entries count and the entries themselves in the described entry
18673 read_formatted_entries (bfd
*abfd
, const gdb_byte
**bufp
,
18674 struct line_header
*lh
,
18675 const struct comp_unit_head
*cu_header
,
18676 void (*callback
) (struct line_header
*lh
,
18679 unsigned int mod_time
,
18680 unsigned int length
))
18682 gdb_byte format_count
, formati
;
18683 ULONGEST data_count
, datai
;
18684 const gdb_byte
*buf
= *bufp
;
18685 const gdb_byte
*format_header_data
;
18687 unsigned int bytes_read
;
18689 format_count
= read_1_byte (abfd
, buf
);
18691 format_header_data
= buf
;
18692 for (formati
= 0; formati
< format_count
; formati
++)
18694 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
18696 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
18700 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
18702 for (datai
= 0; datai
< data_count
; datai
++)
18704 const gdb_byte
*format
= format_header_data
;
18705 struct file_entry fe
;
18707 for (formati
= 0; formati
< format_count
; formati
++)
18709 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
18710 format
+= bytes_read
;
18712 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
18713 format
+= bytes_read
;
18715 gdb::optional
<const char *> string
;
18716 gdb::optional
<unsigned int> uint
;
18720 case DW_FORM_string
:
18721 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
18725 case DW_FORM_line_strp
:
18726 string
.emplace (read_indirect_line_string (abfd
, buf
,
18732 case DW_FORM_data1
:
18733 uint
.emplace (read_1_byte (abfd
, buf
));
18737 case DW_FORM_data2
:
18738 uint
.emplace (read_2_bytes (abfd
, buf
));
18742 case DW_FORM_data4
:
18743 uint
.emplace (read_4_bytes (abfd
, buf
));
18747 case DW_FORM_data8
:
18748 uint
.emplace (read_8_bytes (abfd
, buf
));
18752 case DW_FORM_udata
:
18753 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
18757 case DW_FORM_block
:
18758 /* It is valid only for DW_LNCT_timestamp which is ignored by
18763 switch (content_type
)
18766 if (string
.has_value ())
18769 case DW_LNCT_directory_index
:
18770 if (uint
.has_value ())
18771 fe
.d_index
= (dir_index
) *uint
;
18773 case DW_LNCT_timestamp
:
18774 if (uint
.has_value ())
18775 fe
.mod_time
= *uint
;
18778 if (uint
.has_value ())
18784 complaint (&symfile_complaints
,
18785 _("Unknown format content type %s"),
18786 pulongest (content_type
));
18790 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
18796 /* Read the statement program header starting at OFFSET in
18797 .debug_line, or .debug_line.dwo. Return a pointer
18798 to a struct line_header, allocated using xmalloc.
18799 Returns NULL if there is a problem reading the header, e.g., if it
18800 has a version we don't understand.
18802 NOTE: the strings in the include directory and file name tables of
18803 the returned object point into the dwarf line section buffer,
18804 and must not be freed. */
18806 static line_header_up
18807 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
18809 const gdb_byte
*line_ptr
;
18810 unsigned int bytes_read
, offset_size
;
18812 const char *cur_dir
, *cur_file
;
18813 struct dwarf2_section_info
*section
;
18816 section
= get_debug_line_section (cu
);
18817 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
18818 if (section
->buffer
== NULL
)
18820 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
18821 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
18823 complaint (&symfile_complaints
, _("missing .debug_line section"));
18827 /* We can't do this until we know the section is non-empty.
18828 Only then do we know we have such a section. */
18829 abfd
= get_section_bfd_owner (section
);
18831 /* Make sure that at least there's room for the total_length field.
18832 That could be 12 bytes long, but we're just going to fudge that. */
18833 if (to_underlying (sect_off
) + 4 >= section
->size
)
18835 dwarf2_statement_list_fits_in_line_number_section_complaint ();
18839 line_header_up
lh (new line_header ());
18841 lh
->sect_off
= sect_off
;
18842 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
18844 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
18846 /* Read in the header. */
18848 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
18849 &bytes_read
, &offset_size
);
18850 line_ptr
+= bytes_read
;
18851 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
18853 dwarf2_statement_list_fits_in_line_number_section_complaint ();
18856 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
18857 lh
->version
= read_2_bytes (abfd
, line_ptr
);
18859 if (lh
->version
> 5)
18861 /* This is a version we don't understand. The format could have
18862 changed in ways we don't handle properly so just punt. */
18863 complaint (&symfile_complaints
,
18864 _("unsupported version in .debug_line section"));
18867 if (lh
->version
>= 5)
18869 gdb_byte segment_selector_size
;
18871 /* Skip address size. */
18872 read_1_byte (abfd
, line_ptr
);
18875 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
18877 if (segment_selector_size
!= 0)
18879 complaint (&symfile_complaints
,
18880 _("unsupported segment selector size %u "
18881 "in .debug_line section"),
18882 segment_selector_size
);
18886 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
18887 line_ptr
+= offset_size
;
18888 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
18890 if (lh
->version
>= 4)
18892 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
18896 lh
->maximum_ops_per_instruction
= 1;
18898 if (lh
->maximum_ops_per_instruction
== 0)
18900 lh
->maximum_ops_per_instruction
= 1;
18901 complaint (&symfile_complaints
,
18902 _("invalid maximum_ops_per_instruction "
18903 "in `.debug_line' section"));
18906 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
18908 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
18910 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
18912 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
18914 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
18916 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
18917 for (i
= 1; i
< lh
->opcode_base
; ++i
)
18919 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
18923 if (lh
->version
>= 5)
18925 /* Read directory table. */
18926 read_formatted_entries (abfd
, &line_ptr
, lh
.get (), &cu
->header
,
18927 [] (struct line_header
*lh
, const char *name
,
18928 dir_index d_index
, unsigned int mod_time
,
18929 unsigned int length
)
18931 lh
->add_include_dir (name
);
18934 /* Read file name table. */
18935 read_formatted_entries (abfd
, &line_ptr
, lh
.get (), &cu
->header
,
18936 [] (struct line_header
*lh
, const char *name
,
18937 dir_index d_index
, unsigned int mod_time
,
18938 unsigned int length
)
18940 lh
->add_file_name (name
, d_index
, mod_time
, length
);
18945 /* Read directory table. */
18946 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
18948 line_ptr
+= bytes_read
;
18949 lh
->add_include_dir (cur_dir
);
18951 line_ptr
+= bytes_read
;
18953 /* Read file name table. */
18954 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
18956 unsigned int mod_time
, length
;
18959 line_ptr
+= bytes_read
;
18960 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18961 line_ptr
+= bytes_read
;
18962 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18963 line_ptr
+= bytes_read
;
18964 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18965 line_ptr
+= bytes_read
;
18967 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
18969 line_ptr
+= bytes_read
;
18971 lh
->statement_program_start
= line_ptr
;
18973 if (line_ptr
> (section
->buffer
+ section
->size
))
18974 complaint (&symfile_complaints
,
18975 _("line number info header doesn't "
18976 "fit in `.debug_line' section"));
18981 /* Subroutine of dwarf_decode_lines to simplify it.
18982 Return the file name of the psymtab for included file FILE_INDEX
18983 in line header LH of PST.
18984 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18985 If space for the result is malloc'd, it will be freed by a cleanup.
18986 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
18988 The function creates dangling cleanup registration. */
18990 static const char *
18991 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
18992 const struct partial_symtab
*pst
,
18993 const char *comp_dir
)
18995 const file_entry
&fe
= lh
->file_names
[file_index
];
18996 const char *include_name
= fe
.name
;
18997 const char *include_name_to_compare
= include_name
;
18998 const char *pst_filename
;
18999 char *copied_name
= NULL
;
19002 const char *dir_name
= fe
.include_dir (lh
);
19004 if (!IS_ABSOLUTE_PATH (include_name
)
19005 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
19007 /* Avoid creating a duplicate psymtab for PST.
19008 We do this by comparing INCLUDE_NAME and PST_FILENAME.
19009 Before we do the comparison, however, we need to account
19010 for DIR_NAME and COMP_DIR.
19011 First prepend dir_name (if non-NULL). If we still don't
19012 have an absolute path prepend comp_dir (if non-NULL).
19013 However, the directory we record in the include-file's
19014 psymtab does not contain COMP_DIR (to match the
19015 corresponding symtab(s)).
19020 bash$ gcc -g ./hello.c
19021 include_name = "hello.c"
19023 DW_AT_comp_dir = comp_dir = "/tmp"
19024 DW_AT_name = "./hello.c"
19028 if (dir_name
!= NULL
)
19030 char *tem
= concat (dir_name
, SLASH_STRING
,
19031 include_name
, (char *)NULL
);
19033 make_cleanup (xfree
, tem
);
19034 include_name
= tem
;
19035 include_name_to_compare
= include_name
;
19037 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
19039 char *tem
= concat (comp_dir
, SLASH_STRING
,
19040 include_name
, (char *)NULL
);
19042 make_cleanup (xfree
, tem
);
19043 include_name_to_compare
= tem
;
19047 pst_filename
= pst
->filename
;
19048 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
19050 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
19051 pst_filename
, (char *)NULL
);
19052 pst_filename
= copied_name
;
19055 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
19057 if (copied_name
!= NULL
)
19058 xfree (copied_name
);
19062 return include_name
;
19065 /* State machine to track the state of the line number program. */
19067 class lnp_state_machine
19070 /* Initialize a machine state for the start of a line number
19072 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
19074 file_entry
*current_file ()
19076 /* lh->file_names is 0-based, but the file name numbers in the
19077 statement program are 1-based. */
19078 return m_line_header
->file_name_at (m_file
);
19081 /* Record the line in the state machine. END_SEQUENCE is true if
19082 we're processing the end of a sequence. */
19083 void record_line (bool end_sequence
);
19085 /* Check address and if invalid nop-out the rest of the lines in this
19087 void check_line_address (struct dwarf2_cu
*cu
,
19088 const gdb_byte
*line_ptr
,
19089 CORE_ADDR lowpc
, CORE_ADDR address
);
19091 void handle_set_discriminator (unsigned int discriminator
)
19093 m_discriminator
= discriminator
;
19094 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
19097 /* Handle DW_LNE_set_address. */
19098 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
19101 address
+= baseaddr
;
19102 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
19105 /* Handle DW_LNS_advance_pc. */
19106 void handle_advance_pc (CORE_ADDR adjust
);
19108 /* Handle a special opcode. */
19109 void handle_special_opcode (unsigned char op_code
);
19111 /* Handle DW_LNS_advance_line. */
19112 void handle_advance_line (int line_delta
)
19114 advance_line (line_delta
);
19117 /* Handle DW_LNS_set_file. */
19118 void handle_set_file (file_name_index file
);
19120 /* Handle DW_LNS_negate_stmt. */
19121 void handle_negate_stmt ()
19123 m_is_stmt
= !m_is_stmt
;
19126 /* Handle DW_LNS_const_add_pc. */
19127 void handle_const_add_pc ();
19129 /* Handle DW_LNS_fixed_advance_pc. */
19130 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
19132 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19136 /* Handle DW_LNS_copy. */
19137 void handle_copy ()
19139 record_line (false);
19140 m_discriminator
= 0;
19143 /* Handle DW_LNE_end_sequence. */
19144 void handle_end_sequence ()
19146 m_record_line_callback
= ::record_line
;
19150 /* Advance the line by LINE_DELTA. */
19151 void advance_line (int line_delta
)
19153 m_line
+= line_delta
;
19155 if (line_delta
!= 0)
19156 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19159 gdbarch
*m_gdbarch
;
19161 /* True if we're recording lines.
19162 Otherwise we're building partial symtabs and are just interested in
19163 finding include files mentioned by the line number program. */
19164 bool m_record_lines_p
;
19166 /* The line number header. */
19167 line_header
*m_line_header
;
19169 /* These are part of the standard DWARF line number state machine,
19170 and initialized according to the DWARF spec. */
19172 unsigned char m_op_index
= 0;
19173 /* The line table index (1-based) of the current file. */
19174 file_name_index m_file
= (file_name_index
) 1;
19175 unsigned int m_line
= 1;
19177 /* These are initialized in the constructor. */
19179 CORE_ADDR m_address
;
19181 unsigned int m_discriminator
;
19183 /* Additional bits of state we need to track. */
19185 /* The last file that we called dwarf2_start_subfile for.
19186 This is only used for TLLs. */
19187 unsigned int m_last_file
= 0;
19188 /* The last file a line number was recorded for. */
19189 struct subfile
*m_last_subfile
= NULL
;
19191 /* The function to call to record a line. */
19192 record_line_ftype
*m_record_line_callback
= NULL
;
19194 /* The last line number that was recorded, used to coalesce
19195 consecutive entries for the same line. This can happen, for
19196 example, when discriminators are present. PR 17276. */
19197 unsigned int m_last_line
= 0;
19198 bool m_line_has_non_zero_discriminator
= false;
19202 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
19204 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
19205 / m_line_header
->maximum_ops_per_instruction
)
19206 * m_line_header
->minimum_instruction_length
);
19207 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19208 m_op_index
= ((m_op_index
+ adjust
)
19209 % m_line_header
->maximum_ops_per_instruction
);
19213 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
19215 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
19216 CORE_ADDR addr_adj
= (((m_op_index
19217 + (adj_opcode
/ m_line_header
->line_range
))
19218 / m_line_header
->maximum_ops_per_instruction
)
19219 * m_line_header
->minimum_instruction_length
);
19220 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19221 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
19222 % m_line_header
->maximum_ops_per_instruction
);
19224 int line_delta
= (m_line_header
->line_base
19225 + (adj_opcode
% m_line_header
->line_range
));
19226 advance_line (line_delta
);
19227 record_line (false);
19228 m_discriminator
= 0;
19232 lnp_state_machine::handle_set_file (file_name_index file
)
19236 const file_entry
*fe
= current_file ();
19238 dwarf2_debug_line_missing_file_complaint ();
19239 else if (m_record_lines_p
)
19241 const char *dir
= fe
->include_dir (m_line_header
);
19243 m_last_subfile
= current_subfile
;
19244 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19245 dwarf2_start_subfile (fe
->name
, dir
);
19250 lnp_state_machine::handle_const_add_pc ()
19253 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
19256 = (((m_op_index
+ adjust
)
19257 / m_line_header
->maximum_ops_per_instruction
)
19258 * m_line_header
->minimum_instruction_length
);
19260 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19261 m_op_index
= ((m_op_index
+ adjust
)
19262 % m_line_header
->maximum_ops_per_instruction
);
19265 /* Ignore this record_line request. */
19268 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
19273 /* Return non-zero if we should add LINE to the line number table.
19274 LINE is the line to add, LAST_LINE is the last line that was added,
19275 LAST_SUBFILE is the subfile for LAST_LINE.
19276 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
19277 had a non-zero discriminator.
19279 We have to be careful in the presence of discriminators.
19280 E.g., for this line:
19282 for (i = 0; i < 100000; i++);
19284 clang can emit four line number entries for that one line,
19285 each with a different discriminator.
19286 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
19288 However, we want gdb to coalesce all four entries into one.
19289 Otherwise the user could stepi into the middle of the line and
19290 gdb would get confused about whether the pc really was in the
19291 middle of the line.
19293 Things are further complicated by the fact that two consecutive
19294 line number entries for the same line is a heuristic used by gcc
19295 to denote the end of the prologue. So we can't just discard duplicate
19296 entries, we have to be selective about it. The heuristic we use is
19297 that we only collapse consecutive entries for the same line if at least
19298 one of those entries has a non-zero discriminator. PR 17276.
19300 Note: Addresses in the line number state machine can never go backwards
19301 within one sequence, thus this coalescing is ok. */
19304 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
19305 int line_has_non_zero_discriminator
,
19306 struct subfile
*last_subfile
)
19308 if (current_subfile
!= last_subfile
)
19310 if (line
!= last_line
)
19312 /* Same line for the same file that we've seen already.
19313 As a last check, for pr 17276, only record the line if the line
19314 has never had a non-zero discriminator. */
19315 if (!line_has_non_zero_discriminator
)
19320 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
19321 in the line table of subfile SUBFILE. */
19324 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19325 unsigned int line
, CORE_ADDR address
,
19326 record_line_ftype p_record_line
)
19328 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
19330 if (dwarf_line_debug
)
19332 fprintf_unfiltered (gdb_stdlog
,
19333 "Recording line %u, file %s, address %s\n",
19334 line
, lbasename (subfile
->name
),
19335 paddress (gdbarch
, address
));
19338 (*p_record_line
) (subfile
, line
, addr
);
19341 /* Subroutine of dwarf_decode_lines_1 to simplify it.
19342 Mark the end of a set of line number records.
19343 The arguments are the same as for dwarf_record_line_1.
19344 If SUBFILE is NULL the request is ignored. */
19347 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19348 CORE_ADDR address
, record_line_ftype p_record_line
)
19350 if (subfile
== NULL
)
19353 if (dwarf_line_debug
)
19355 fprintf_unfiltered (gdb_stdlog
,
19356 "Finishing current line, file %s, address %s\n",
19357 lbasename (subfile
->name
),
19358 paddress (gdbarch
, address
));
19361 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
19365 lnp_state_machine::record_line (bool end_sequence
)
19367 if (dwarf_line_debug
)
19369 fprintf_unfiltered (gdb_stdlog
,
19370 "Processing actual line %u: file %u,"
19371 " address %s, is_stmt %u, discrim %u\n",
19372 m_line
, to_underlying (m_file
),
19373 paddress (m_gdbarch
, m_address
),
19374 m_is_stmt
, m_discriminator
);
19377 file_entry
*fe
= current_file ();
19380 dwarf2_debug_line_missing_file_complaint ();
19381 /* For now we ignore lines not starting on an instruction boundary.
19382 But not when processing end_sequence for compatibility with the
19383 previous version of the code. */
19384 else if (m_op_index
== 0 || end_sequence
)
19386 fe
->included_p
= 1;
19387 if (m_record_lines_p
&& m_is_stmt
)
19389 if (m_last_subfile
!= current_subfile
|| end_sequence
)
19391 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
19392 m_address
, m_record_line_callback
);
19397 if (dwarf_record_line_p (m_line
, m_last_line
,
19398 m_line_has_non_zero_discriminator
,
19401 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
19403 m_record_line_callback
);
19405 m_last_subfile
= current_subfile
;
19406 m_last_line
= m_line
;
19412 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
19413 bool record_lines_p
)
19416 m_record_lines_p
= record_lines_p
;
19417 m_line_header
= lh
;
19419 m_record_line_callback
= ::record_line
;
19421 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
19422 was a line entry for it so that the backend has a chance to adjust it
19423 and also record it in case it needs it. This is currently used by MIPS
19424 code, cf. `mips_adjust_dwarf2_line'. */
19425 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
19426 m_is_stmt
= lh
->default_is_stmt
;
19427 m_discriminator
= 0;
19431 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
19432 const gdb_byte
*line_ptr
,
19433 CORE_ADDR lowpc
, CORE_ADDR address
)
19435 /* If address < lowpc then it's not a usable value, it's outside the
19436 pc range of the CU. However, we restrict the test to only address
19437 values of zero to preserve GDB's previous behaviour which is to
19438 handle the specific case of a function being GC'd by the linker. */
19440 if (address
== 0 && address
< lowpc
)
19442 /* This line table is for a function which has been
19443 GCd by the linker. Ignore it. PR gdb/12528 */
19445 struct objfile
*objfile
= cu
->objfile
;
19446 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
19448 complaint (&symfile_complaints
,
19449 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
19450 line_offset
, objfile_name (objfile
));
19451 m_record_line_callback
= noop_record_line
;
19452 /* Note: record_line_callback is left as noop_record_line until
19453 we see DW_LNE_end_sequence. */
19457 /* Subroutine of dwarf_decode_lines to simplify it.
19458 Process the line number information in LH.
19459 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
19460 program in order to set included_p for every referenced header. */
19463 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
19464 const int decode_for_pst_p
, CORE_ADDR lowpc
)
19466 const gdb_byte
*line_ptr
, *extended_end
;
19467 const gdb_byte
*line_end
;
19468 unsigned int bytes_read
, extended_len
;
19469 unsigned char op_code
, extended_op
;
19470 CORE_ADDR baseaddr
;
19471 struct objfile
*objfile
= cu
->objfile
;
19472 bfd
*abfd
= objfile
->obfd
;
19473 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19474 /* True if we're recording line info (as opposed to building partial
19475 symtabs and just interested in finding include files mentioned by
19476 the line number program). */
19477 bool record_lines_p
= !decode_for_pst_p
;
19479 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19481 line_ptr
= lh
->statement_program_start
;
19482 line_end
= lh
->statement_program_end
;
19484 /* Read the statement sequences until there's nothing left. */
19485 while (line_ptr
< line_end
)
19487 /* The DWARF line number program state machine. Reset the state
19488 machine at the start of each sequence. */
19489 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
19490 bool end_sequence
= false;
19492 if (record_lines_p
)
19494 /* Start a subfile for the current file of the state
19496 const file_entry
*fe
= state_machine
.current_file ();
19499 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
19502 /* Decode the table. */
19503 while (line_ptr
< line_end
&& !end_sequence
)
19505 op_code
= read_1_byte (abfd
, line_ptr
);
19508 if (op_code
>= lh
->opcode_base
)
19510 /* Special opcode. */
19511 state_machine
.handle_special_opcode (op_code
);
19513 else switch (op_code
)
19515 case DW_LNS_extended_op
:
19516 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
19518 line_ptr
+= bytes_read
;
19519 extended_end
= line_ptr
+ extended_len
;
19520 extended_op
= read_1_byte (abfd
, line_ptr
);
19522 switch (extended_op
)
19524 case DW_LNE_end_sequence
:
19525 state_machine
.handle_end_sequence ();
19526 end_sequence
= true;
19528 case DW_LNE_set_address
:
19531 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
19532 line_ptr
+= bytes_read
;
19534 state_machine
.check_line_address (cu
, line_ptr
,
19536 state_machine
.handle_set_address (baseaddr
, address
);
19539 case DW_LNE_define_file
:
19541 const char *cur_file
;
19542 unsigned int mod_time
, length
;
19545 cur_file
= read_direct_string (abfd
, line_ptr
,
19547 line_ptr
+= bytes_read
;
19548 dindex
= (dir_index
)
19549 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19550 line_ptr
+= bytes_read
;
19552 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19553 line_ptr
+= bytes_read
;
19555 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19556 line_ptr
+= bytes_read
;
19557 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
19560 case DW_LNE_set_discriminator
:
19562 /* The discriminator is not interesting to the
19563 debugger; just ignore it. We still need to
19564 check its value though:
19565 if there are consecutive entries for the same
19566 (non-prologue) line we want to coalesce them.
19569 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19570 line_ptr
+= bytes_read
;
19572 state_machine
.handle_set_discriminator (discr
);
19576 complaint (&symfile_complaints
,
19577 _("mangled .debug_line section"));
19580 /* Make sure that we parsed the extended op correctly. If e.g.
19581 we expected a different address size than the producer used,
19582 we may have read the wrong number of bytes. */
19583 if (line_ptr
!= extended_end
)
19585 complaint (&symfile_complaints
,
19586 _("mangled .debug_line section"));
19591 state_machine
.handle_copy ();
19593 case DW_LNS_advance_pc
:
19596 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19597 line_ptr
+= bytes_read
;
19599 state_machine
.handle_advance_pc (adjust
);
19602 case DW_LNS_advance_line
:
19605 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
19606 line_ptr
+= bytes_read
;
19608 state_machine
.handle_advance_line (line_delta
);
19611 case DW_LNS_set_file
:
19613 file_name_index file
19614 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
19616 line_ptr
+= bytes_read
;
19618 state_machine
.handle_set_file (file
);
19621 case DW_LNS_set_column
:
19622 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19623 line_ptr
+= bytes_read
;
19625 case DW_LNS_negate_stmt
:
19626 state_machine
.handle_negate_stmt ();
19628 case DW_LNS_set_basic_block
:
19630 /* Add to the address register of the state machine the
19631 address increment value corresponding to special opcode
19632 255. I.e., this value is scaled by the minimum
19633 instruction length since special opcode 255 would have
19634 scaled the increment. */
19635 case DW_LNS_const_add_pc
:
19636 state_machine
.handle_const_add_pc ();
19638 case DW_LNS_fixed_advance_pc
:
19640 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
19643 state_machine
.handle_fixed_advance_pc (addr_adj
);
19648 /* Unknown standard opcode, ignore it. */
19651 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
19653 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19654 line_ptr
+= bytes_read
;
19661 dwarf2_debug_line_missing_end_sequence_complaint ();
19663 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
19664 in which case we still finish recording the last line). */
19665 state_machine
.record_line (true);
19669 /* Decode the Line Number Program (LNP) for the given line_header
19670 structure and CU. The actual information extracted and the type
19671 of structures created from the LNP depends on the value of PST.
19673 1. If PST is NULL, then this procedure uses the data from the program
19674 to create all necessary symbol tables, and their linetables.
19676 2. If PST is not NULL, this procedure reads the program to determine
19677 the list of files included by the unit represented by PST, and
19678 builds all the associated partial symbol tables.
19680 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19681 It is used for relative paths in the line table.
19682 NOTE: When processing partial symtabs (pst != NULL),
19683 comp_dir == pst->dirname.
19685 NOTE: It is important that psymtabs have the same file name (via strcmp)
19686 as the corresponding symtab. Since COMP_DIR is not used in the name of the
19687 symtab we don't use it in the name of the psymtabs we create.
19688 E.g. expand_line_sal requires this when finding psymtabs to expand.
19689 A good testcase for this is mb-inline.exp.
19691 LOWPC is the lowest address in CU (or 0 if not known).
19693 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
19694 for its PC<->lines mapping information. Otherwise only the filename
19695 table is read in. */
19698 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
19699 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
19700 CORE_ADDR lowpc
, int decode_mapping
)
19702 struct objfile
*objfile
= cu
->objfile
;
19703 const int decode_for_pst_p
= (pst
!= NULL
);
19705 if (decode_mapping
)
19706 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
19708 if (decode_for_pst_p
)
19712 /* Now that we're done scanning the Line Header Program, we can
19713 create the psymtab of each included file. */
19714 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
19715 if (lh
->file_names
[file_index
].included_p
== 1)
19717 const char *include_name
=
19718 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
19719 if (include_name
!= NULL
)
19720 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
19725 /* Make sure a symtab is created for every file, even files
19726 which contain only variables (i.e. no code with associated
19728 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
19731 for (i
= 0; i
< lh
->file_names
.size (); i
++)
19733 file_entry
&fe
= lh
->file_names
[i
];
19735 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
19737 if (current_subfile
->symtab
== NULL
)
19739 current_subfile
->symtab
19740 = allocate_symtab (cust
, current_subfile
->name
);
19742 fe
.symtab
= current_subfile
->symtab
;
19747 /* Start a subfile for DWARF. FILENAME is the name of the file and
19748 DIRNAME the name of the source directory which contains FILENAME
19749 or NULL if not known.
19750 This routine tries to keep line numbers from identical absolute and
19751 relative file names in a common subfile.
19753 Using the `list' example from the GDB testsuite, which resides in
19754 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
19755 of /srcdir/list0.c yields the following debugging information for list0.c:
19757 DW_AT_name: /srcdir/list0.c
19758 DW_AT_comp_dir: /compdir
19759 files.files[0].name: list0.h
19760 files.files[0].dir: /srcdir
19761 files.files[1].name: list0.c
19762 files.files[1].dir: /srcdir
19764 The line number information for list0.c has to end up in a single
19765 subfile, so that `break /srcdir/list0.c:1' works as expected.
19766 start_subfile will ensure that this happens provided that we pass the
19767 concatenation of files.files[1].dir and files.files[1].name as the
19771 dwarf2_start_subfile (const char *filename
, const char *dirname
)
19775 /* In order not to lose the line information directory,
19776 we concatenate it to the filename when it makes sense.
19777 Note that the Dwarf3 standard says (speaking of filenames in line
19778 information): ``The directory index is ignored for file names
19779 that represent full path names''. Thus ignoring dirname in the
19780 `else' branch below isn't an issue. */
19782 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
19784 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
19788 start_subfile (filename
);
19794 /* Start a symtab for DWARF.
19795 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
19797 static struct compunit_symtab
*
19798 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
19799 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
19801 struct compunit_symtab
*cust
19802 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
, cu
->language
);
19804 record_debugformat ("DWARF 2");
19805 record_producer (cu
->producer
);
19807 /* We assume that we're processing GCC output. */
19808 processing_gcc_compilation
= 2;
19810 cu
->processing_has_namespace_info
= 0;
19816 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
19817 struct dwarf2_cu
*cu
)
19819 struct objfile
*objfile
= cu
->objfile
;
19820 struct comp_unit_head
*cu_header
= &cu
->header
;
19822 /* NOTE drow/2003-01-30: There used to be a comment and some special
19823 code here to turn a symbol with DW_AT_external and a
19824 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
19825 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
19826 with some versions of binutils) where shared libraries could have
19827 relocations against symbols in their debug information - the
19828 minimal symbol would have the right address, but the debug info
19829 would not. It's no longer necessary, because we will explicitly
19830 apply relocations when we read in the debug information now. */
19832 /* A DW_AT_location attribute with no contents indicates that a
19833 variable has been optimized away. */
19834 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
19836 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
19840 /* Handle one degenerate form of location expression specially, to
19841 preserve GDB's previous behavior when section offsets are
19842 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
19843 then mark this symbol as LOC_STATIC. */
19845 if (attr_form_is_block (attr
)
19846 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
19847 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
19848 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
19849 && (DW_BLOCK (attr
)->size
19850 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
19852 unsigned int dummy
;
19854 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
19855 SYMBOL_VALUE_ADDRESS (sym
) =
19856 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
19858 SYMBOL_VALUE_ADDRESS (sym
) =
19859 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
19860 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
19861 fixup_symbol_section (sym
, objfile
);
19862 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
19863 SYMBOL_SECTION (sym
));
19867 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
19868 expression evaluator, and use LOC_COMPUTED only when necessary
19869 (i.e. when the value of a register or memory location is
19870 referenced, or a thread-local block, etc.). Then again, it might
19871 not be worthwhile. I'm assuming that it isn't unless performance
19872 or memory numbers show me otherwise. */
19874 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
19876 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
19877 cu
->has_loclist
= 1;
19880 /* Given a pointer to a DWARF information entry, figure out if we need
19881 to make a symbol table entry for it, and if so, create a new entry
19882 and return a pointer to it.
19883 If TYPE is NULL, determine symbol type from the die, otherwise
19884 used the passed type.
19885 If SPACE is not NULL, use it to hold the new symbol. If it is
19886 NULL, allocate a new symbol on the objfile's obstack. */
19888 static struct symbol
*
19889 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
19890 struct symbol
*space
)
19892 struct objfile
*objfile
= cu
->objfile
;
19893 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19894 struct symbol
*sym
= NULL
;
19896 struct attribute
*attr
= NULL
;
19897 struct attribute
*attr2
= NULL
;
19898 CORE_ADDR baseaddr
;
19899 struct pending
**list_to_add
= NULL
;
19901 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
19903 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19905 name
= dwarf2_name (die
, cu
);
19908 const char *linkagename
;
19909 int suppress_add
= 0;
19914 sym
= allocate_symbol (objfile
);
19915 OBJSTAT (objfile
, n_syms
++);
19917 /* Cache this symbol's name and the name's demangled form (if any). */
19918 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
19919 linkagename
= dwarf2_physname (name
, die
, cu
);
19920 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
19922 /* Fortran does not have mangling standard and the mangling does differ
19923 between gfortran, iFort etc. */
19924 if (cu
->language
== language_fortran
19925 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
19926 symbol_set_demangled_name (&(sym
->ginfo
),
19927 dwarf2_full_name (name
, die
, cu
),
19930 /* Default assumptions.
19931 Use the passed type or decode it from the die. */
19932 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19933 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
19935 SYMBOL_TYPE (sym
) = type
;
19937 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
19938 attr
= dwarf2_attr (die
,
19939 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
19943 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
19946 attr
= dwarf2_attr (die
,
19947 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
19951 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
19952 struct file_entry
*fe
;
19954 if (cu
->line_header
!= NULL
)
19955 fe
= cu
->line_header
->file_name_at (file_index
);
19960 complaint (&symfile_complaints
,
19961 _("file index out of range"));
19963 symbol_set_symtab (sym
, fe
->symtab
);
19969 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
19974 addr
= attr_value_as_address (attr
);
19975 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
19976 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
19978 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
19979 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
19980 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
19981 add_symbol_to_list (sym
, cu
->list_in_scope
);
19983 case DW_TAG_subprogram
:
19984 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
19986 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
19987 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19988 if ((attr2
&& (DW_UNSND (attr2
) != 0))
19989 || cu
->language
== language_ada
)
19991 /* Subprograms marked external are stored as a global symbol.
19992 Ada subprograms, whether marked external or not, are always
19993 stored as a global symbol, because we want to be able to
19994 access them globally. For instance, we want to be able
19995 to break on a nested subprogram without having to
19996 specify the context. */
19997 list_to_add
= &global_symbols
;
20001 list_to_add
= cu
->list_in_scope
;
20004 case DW_TAG_inlined_subroutine
:
20005 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20007 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20008 SYMBOL_INLINED (sym
) = 1;
20009 list_to_add
= cu
->list_in_scope
;
20011 case DW_TAG_template_value_param
:
20013 /* Fall through. */
20014 case DW_TAG_constant
:
20015 case DW_TAG_variable
:
20016 case DW_TAG_member
:
20017 /* Compilation with minimal debug info may result in
20018 variables with missing type entries. Change the
20019 misleading `void' type to something sensible. */
20020 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
20021 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
20023 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20024 /* In the case of DW_TAG_member, we should only be called for
20025 static const members. */
20026 if (die
->tag
== DW_TAG_member
)
20028 /* dwarf2_add_field uses die_is_declaration,
20029 so we do the same. */
20030 gdb_assert (die_is_declaration (die
, cu
));
20035 dwarf2_const_value (attr
, sym
, cu
);
20036 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20039 if (attr2
&& (DW_UNSND (attr2
) != 0))
20040 list_to_add
= &global_symbols
;
20042 list_to_add
= cu
->list_in_scope
;
20046 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20049 var_decode_location (attr
, sym
, cu
);
20050 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20052 /* Fortran explicitly imports any global symbols to the local
20053 scope by DW_TAG_common_block. */
20054 if (cu
->language
== language_fortran
&& die
->parent
20055 && die
->parent
->tag
== DW_TAG_common_block
)
20058 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20059 && SYMBOL_VALUE_ADDRESS (sym
) == 0
20060 && !dwarf2_per_objfile
->has_section_at_zero
)
20062 /* When a static variable is eliminated by the linker,
20063 the corresponding debug information is not stripped
20064 out, but the variable address is set to null;
20065 do not add such variables into symbol table. */
20067 else if (attr2
&& (DW_UNSND (attr2
) != 0))
20069 /* Workaround gfortran PR debug/40040 - it uses
20070 DW_AT_location for variables in -fPIC libraries which may
20071 get overriden by other libraries/executable and get
20072 a different address. Resolve it by the minimal symbol
20073 which may come from inferior's executable using copy
20074 relocation. Make this workaround only for gfortran as for
20075 other compilers GDB cannot guess the minimal symbol
20076 Fortran mangling kind. */
20077 if (cu
->language
== language_fortran
&& die
->parent
20078 && die
->parent
->tag
== DW_TAG_module
20080 && startswith (cu
->producer
, "GNU Fortran"))
20081 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20083 /* A variable with DW_AT_external is never static,
20084 but it may be block-scoped. */
20085 list_to_add
= (cu
->list_in_scope
== &file_symbols
20086 ? &global_symbols
: cu
->list_in_scope
);
20089 list_to_add
= cu
->list_in_scope
;
20093 /* We do not know the address of this symbol.
20094 If it is an external symbol and we have type information
20095 for it, enter the symbol as a LOC_UNRESOLVED symbol.
20096 The address of the variable will then be determined from
20097 the minimal symbol table whenever the variable is
20099 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20101 /* Fortran explicitly imports any global symbols to the local
20102 scope by DW_TAG_common_block. */
20103 if (cu
->language
== language_fortran
&& die
->parent
20104 && die
->parent
->tag
== DW_TAG_common_block
)
20106 /* SYMBOL_CLASS doesn't matter here because
20107 read_common_block is going to reset it. */
20109 list_to_add
= cu
->list_in_scope
;
20111 else if (attr2
&& (DW_UNSND (attr2
) != 0)
20112 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
20114 /* A variable with DW_AT_external is never static, but it
20115 may be block-scoped. */
20116 list_to_add
= (cu
->list_in_scope
== &file_symbols
20117 ? &global_symbols
: cu
->list_in_scope
);
20119 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20121 else if (!die_is_declaration (die
, cu
))
20123 /* Use the default LOC_OPTIMIZED_OUT class. */
20124 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
20126 list_to_add
= cu
->list_in_scope
;
20130 case DW_TAG_formal_parameter
:
20131 /* If we are inside a function, mark this as an argument. If
20132 not, we might be looking at an argument to an inlined function
20133 when we do not have enough information to show inlined frames;
20134 pretend it's a local variable in that case so that the user can
20136 if (context_stack_depth
> 0
20137 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
20138 SYMBOL_IS_ARGUMENT (sym
) = 1;
20139 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20142 var_decode_location (attr
, sym
, cu
);
20144 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20147 dwarf2_const_value (attr
, sym
, cu
);
20150 list_to_add
= cu
->list_in_scope
;
20152 case DW_TAG_unspecified_parameters
:
20153 /* From varargs functions; gdb doesn't seem to have any
20154 interest in this information, so just ignore it for now.
20157 case DW_TAG_template_type_param
:
20159 /* Fall through. */
20160 case DW_TAG_class_type
:
20161 case DW_TAG_interface_type
:
20162 case DW_TAG_structure_type
:
20163 case DW_TAG_union_type
:
20164 case DW_TAG_set_type
:
20165 case DW_TAG_enumeration_type
:
20166 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20167 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
20170 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
20171 really ever be static objects: otherwise, if you try
20172 to, say, break of a class's method and you're in a file
20173 which doesn't mention that class, it won't work unless
20174 the check for all static symbols in lookup_symbol_aux
20175 saves you. See the OtherFileClass tests in
20176 gdb.c++/namespace.exp. */
20180 list_to_add
= (cu
->list_in_scope
== &file_symbols
20181 && cu
->language
== language_cplus
20182 ? &global_symbols
: cu
->list_in_scope
);
20184 /* The semantics of C++ state that "struct foo {
20185 ... }" also defines a typedef for "foo". */
20186 if (cu
->language
== language_cplus
20187 || cu
->language
== language_ada
20188 || cu
->language
== language_d
20189 || cu
->language
== language_rust
)
20191 /* The symbol's name is already allocated along
20192 with this objfile, so we don't need to
20193 duplicate it for the type. */
20194 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
20195 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
20200 case DW_TAG_typedef
:
20201 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20202 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20203 list_to_add
= cu
->list_in_scope
;
20205 case DW_TAG_base_type
:
20206 case DW_TAG_subrange_type
:
20207 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20208 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20209 list_to_add
= cu
->list_in_scope
;
20211 case DW_TAG_enumerator
:
20212 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20215 dwarf2_const_value (attr
, sym
, cu
);
20218 /* NOTE: carlton/2003-11-10: See comment above in the
20219 DW_TAG_class_type, etc. block. */
20221 list_to_add
= (cu
->list_in_scope
== &file_symbols
20222 && cu
->language
== language_cplus
20223 ? &global_symbols
: cu
->list_in_scope
);
20226 case DW_TAG_imported_declaration
:
20227 case DW_TAG_namespace
:
20228 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20229 list_to_add
= &global_symbols
;
20231 case DW_TAG_module
:
20232 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20233 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
20234 list_to_add
= &global_symbols
;
20236 case DW_TAG_common_block
:
20237 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
20238 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
20239 add_symbol_to_list (sym
, cu
->list_in_scope
);
20242 /* Not a tag we recognize. Hopefully we aren't processing
20243 trash data, but since we must specifically ignore things
20244 we don't recognize, there is nothing else we should do at
20246 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
20247 dwarf_tag_name (die
->tag
));
20253 sym
->hash_next
= objfile
->template_symbols
;
20254 objfile
->template_symbols
= sym
;
20255 list_to_add
= NULL
;
20258 if (list_to_add
!= NULL
)
20259 add_symbol_to_list (sym
, list_to_add
);
20261 /* For the benefit of old versions of GCC, check for anonymous
20262 namespaces based on the demangled name. */
20263 if (!cu
->processing_has_namespace_info
20264 && cu
->language
== language_cplus
)
20265 cp_scan_for_anonymous_namespaces (sym
, objfile
);
20270 /* A wrapper for new_symbol_full that always allocates a new symbol. */
20272 static struct symbol
*
20273 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
20275 return new_symbol_full (die
, type
, cu
, NULL
);
20278 /* Given an attr with a DW_FORM_dataN value in host byte order,
20279 zero-extend it as appropriate for the symbol's type. The DWARF
20280 standard (v4) is not entirely clear about the meaning of using
20281 DW_FORM_dataN for a constant with a signed type, where the type is
20282 wider than the data. The conclusion of a discussion on the DWARF
20283 list was that this is unspecified. We choose to always zero-extend
20284 because that is the interpretation long in use by GCC. */
20287 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
20288 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
20290 struct objfile
*objfile
= cu
->objfile
;
20291 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
20292 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
20293 LONGEST l
= DW_UNSND (attr
);
20295 if (bits
< sizeof (*value
) * 8)
20297 l
&= ((LONGEST
) 1 << bits
) - 1;
20300 else if (bits
== sizeof (*value
) * 8)
20304 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
20305 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
20312 /* Read a constant value from an attribute. Either set *VALUE, or if
20313 the value does not fit in *VALUE, set *BYTES - either already
20314 allocated on the objfile obstack, or newly allocated on OBSTACK,
20315 or, set *BATON, if we translated the constant to a location
20319 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
20320 const char *name
, struct obstack
*obstack
,
20321 struct dwarf2_cu
*cu
,
20322 LONGEST
*value
, const gdb_byte
**bytes
,
20323 struct dwarf2_locexpr_baton
**baton
)
20325 struct objfile
*objfile
= cu
->objfile
;
20326 struct comp_unit_head
*cu_header
= &cu
->header
;
20327 struct dwarf_block
*blk
;
20328 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
20329 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20335 switch (attr
->form
)
20338 case DW_FORM_GNU_addr_index
:
20342 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
20343 dwarf2_const_value_length_mismatch_complaint (name
,
20344 cu_header
->addr_size
,
20345 TYPE_LENGTH (type
));
20346 /* Symbols of this form are reasonably rare, so we just
20347 piggyback on the existing location code rather than writing
20348 a new implementation of symbol_computed_ops. */
20349 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
20350 (*baton
)->per_cu
= cu
->per_cu
;
20351 gdb_assert ((*baton
)->per_cu
);
20353 (*baton
)->size
= 2 + cu_header
->addr_size
;
20354 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
20355 (*baton
)->data
= data
;
20357 data
[0] = DW_OP_addr
;
20358 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
20359 byte_order
, DW_ADDR (attr
));
20360 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
20363 case DW_FORM_string
:
20365 case DW_FORM_GNU_str_index
:
20366 case DW_FORM_GNU_strp_alt
:
20367 /* DW_STRING is already allocated on the objfile obstack, point
20369 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
20371 case DW_FORM_block1
:
20372 case DW_FORM_block2
:
20373 case DW_FORM_block4
:
20374 case DW_FORM_block
:
20375 case DW_FORM_exprloc
:
20376 case DW_FORM_data16
:
20377 blk
= DW_BLOCK (attr
);
20378 if (TYPE_LENGTH (type
) != blk
->size
)
20379 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
20380 TYPE_LENGTH (type
));
20381 *bytes
= blk
->data
;
20384 /* The DW_AT_const_value attributes are supposed to carry the
20385 symbol's value "represented as it would be on the target
20386 architecture." By the time we get here, it's already been
20387 converted to host endianness, so we just need to sign- or
20388 zero-extend it as appropriate. */
20389 case DW_FORM_data1
:
20390 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
20392 case DW_FORM_data2
:
20393 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
20395 case DW_FORM_data4
:
20396 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
20398 case DW_FORM_data8
:
20399 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
20402 case DW_FORM_sdata
:
20403 case DW_FORM_implicit_const
:
20404 *value
= DW_SND (attr
);
20407 case DW_FORM_udata
:
20408 *value
= DW_UNSND (attr
);
20412 complaint (&symfile_complaints
,
20413 _("unsupported const value attribute form: '%s'"),
20414 dwarf_form_name (attr
->form
));
20421 /* Copy constant value from an attribute to a symbol. */
20424 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
20425 struct dwarf2_cu
*cu
)
20427 struct objfile
*objfile
= cu
->objfile
;
20429 const gdb_byte
*bytes
;
20430 struct dwarf2_locexpr_baton
*baton
;
20432 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
20433 SYMBOL_PRINT_NAME (sym
),
20434 &objfile
->objfile_obstack
, cu
,
20435 &value
, &bytes
, &baton
);
20439 SYMBOL_LOCATION_BATON (sym
) = baton
;
20440 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
20442 else if (bytes
!= NULL
)
20444 SYMBOL_VALUE_BYTES (sym
) = bytes
;
20445 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
20449 SYMBOL_VALUE (sym
) = value
;
20450 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
20454 /* Return the type of the die in question using its DW_AT_type attribute. */
20456 static struct type
*
20457 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
20459 struct attribute
*type_attr
;
20461 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
20464 /* A missing DW_AT_type represents a void type. */
20465 return objfile_type (cu
->objfile
)->builtin_void
;
20468 return lookup_die_type (die
, type_attr
, cu
);
20471 /* True iff CU's producer generates GNAT Ada auxiliary information
20472 that allows to find parallel types through that information instead
20473 of having to do expensive parallel lookups by type name. */
20476 need_gnat_info (struct dwarf2_cu
*cu
)
20478 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
20479 of GNAT produces this auxiliary information, without any indication
20480 that it is produced. Part of enhancing the FSF version of GNAT
20481 to produce that information will be to put in place an indicator
20482 that we can use in order to determine whether the descriptive type
20483 info is available or not. One suggestion that has been made is
20484 to use a new attribute, attached to the CU die. For now, assume
20485 that the descriptive type info is not available. */
20489 /* Return the auxiliary type of the die in question using its
20490 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
20491 attribute is not present. */
20493 static struct type
*
20494 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
20496 struct attribute
*type_attr
;
20498 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
20502 return lookup_die_type (die
, type_attr
, cu
);
20505 /* If DIE has a descriptive_type attribute, then set the TYPE's
20506 descriptive type accordingly. */
20509 set_descriptive_type (struct type
*type
, struct die_info
*die
,
20510 struct dwarf2_cu
*cu
)
20512 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
20514 if (descriptive_type
)
20516 ALLOCATE_GNAT_AUX_TYPE (type
);
20517 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
20521 /* Return the containing type of the die in question using its
20522 DW_AT_containing_type attribute. */
20524 static struct type
*
20525 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
20527 struct attribute
*type_attr
;
20529 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
20531 error (_("Dwarf Error: Problem turning containing type into gdb type "
20532 "[in module %s]"), objfile_name (cu
->objfile
));
20534 return lookup_die_type (die
, type_attr
, cu
);
20537 /* Return an error marker type to use for the ill formed type in DIE/CU. */
20539 static struct type
*
20540 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
20542 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20543 char *message
, *saved
;
20545 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
20546 objfile_name (objfile
),
20547 to_underlying (cu
->header
.sect_off
),
20548 to_underlying (die
->sect_off
));
20549 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
20550 message
, strlen (message
));
20553 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
20556 /* Look up the type of DIE in CU using its type attribute ATTR.
20557 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
20558 DW_AT_containing_type.
20559 If there is no type substitute an error marker. */
20561 static struct type
*
20562 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
20563 struct dwarf2_cu
*cu
)
20565 struct objfile
*objfile
= cu
->objfile
;
20566 struct type
*this_type
;
20568 gdb_assert (attr
->name
== DW_AT_type
20569 || attr
->name
== DW_AT_GNAT_descriptive_type
20570 || attr
->name
== DW_AT_containing_type
);
20572 /* First see if we have it cached. */
20574 if (attr
->form
== DW_FORM_GNU_ref_alt
)
20576 struct dwarf2_per_cu_data
*per_cu
;
20577 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
20579 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1, cu
->objfile
);
20580 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
20582 else if (attr_form_is_ref (attr
))
20584 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
20586 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
20588 else if (attr
->form
== DW_FORM_ref_sig8
)
20590 ULONGEST signature
= DW_SIGNATURE (attr
);
20592 return get_signatured_type (die
, signature
, cu
);
20596 complaint (&symfile_complaints
,
20597 _("Dwarf Error: Bad type attribute %s in DIE"
20598 " at 0x%x [in module %s]"),
20599 dwarf_attr_name (attr
->name
), to_underlying (die
->sect_off
),
20600 objfile_name (objfile
));
20601 return build_error_marker_type (cu
, die
);
20604 /* If not cached we need to read it in. */
20606 if (this_type
== NULL
)
20608 struct die_info
*type_die
= NULL
;
20609 struct dwarf2_cu
*type_cu
= cu
;
20611 if (attr_form_is_ref (attr
))
20612 type_die
= follow_die_ref (die
, attr
, &type_cu
);
20613 if (type_die
== NULL
)
20614 return build_error_marker_type (cu
, die
);
20615 /* If we find the type now, it's probably because the type came
20616 from an inter-CU reference and the type's CU got expanded before
20618 this_type
= read_type_die (type_die
, type_cu
);
20621 /* If we still don't have a type use an error marker. */
20623 if (this_type
== NULL
)
20624 return build_error_marker_type (cu
, die
);
20629 /* Return the type in DIE, CU.
20630 Returns NULL for invalid types.
20632 This first does a lookup in die_type_hash,
20633 and only reads the die in if necessary.
20635 NOTE: This can be called when reading in partial or full symbols. */
20637 static struct type
*
20638 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
20640 struct type
*this_type
;
20642 this_type
= get_die_type (die
, cu
);
20646 return read_type_die_1 (die
, cu
);
20649 /* Read the type in DIE, CU.
20650 Returns NULL for invalid types. */
20652 static struct type
*
20653 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
20655 struct type
*this_type
= NULL
;
20659 case DW_TAG_class_type
:
20660 case DW_TAG_interface_type
:
20661 case DW_TAG_structure_type
:
20662 case DW_TAG_union_type
:
20663 this_type
= read_structure_type (die
, cu
);
20665 case DW_TAG_enumeration_type
:
20666 this_type
= read_enumeration_type (die
, cu
);
20668 case DW_TAG_subprogram
:
20669 case DW_TAG_subroutine_type
:
20670 case DW_TAG_inlined_subroutine
:
20671 this_type
= read_subroutine_type (die
, cu
);
20673 case DW_TAG_array_type
:
20674 this_type
= read_array_type (die
, cu
);
20676 case DW_TAG_set_type
:
20677 this_type
= read_set_type (die
, cu
);
20679 case DW_TAG_pointer_type
:
20680 this_type
= read_tag_pointer_type (die
, cu
);
20682 case DW_TAG_ptr_to_member_type
:
20683 this_type
= read_tag_ptr_to_member_type (die
, cu
);
20685 case DW_TAG_reference_type
:
20686 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
20688 case DW_TAG_rvalue_reference_type
:
20689 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
20691 case DW_TAG_const_type
:
20692 this_type
= read_tag_const_type (die
, cu
);
20694 case DW_TAG_volatile_type
:
20695 this_type
= read_tag_volatile_type (die
, cu
);
20697 case DW_TAG_restrict_type
:
20698 this_type
= read_tag_restrict_type (die
, cu
);
20700 case DW_TAG_string_type
:
20701 this_type
= read_tag_string_type (die
, cu
);
20703 case DW_TAG_typedef
:
20704 this_type
= read_typedef (die
, cu
);
20706 case DW_TAG_subrange_type
:
20707 this_type
= read_subrange_type (die
, cu
);
20709 case DW_TAG_base_type
:
20710 this_type
= read_base_type (die
, cu
);
20712 case DW_TAG_unspecified_type
:
20713 this_type
= read_unspecified_type (die
, cu
);
20715 case DW_TAG_namespace
:
20716 this_type
= read_namespace_type (die
, cu
);
20718 case DW_TAG_module
:
20719 this_type
= read_module_type (die
, cu
);
20721 case DW_TAG_atomic_type
:
20722 this_type
= read_tag_atomic_type (die
, cu
);
20725 complaint (&symfile_complaints
,
20726 _("unexpected tag in read_type_die: '%s'"),
20727 dwarf_tag_name (die
->tag
));
20734 /* See if we can figure out if the class lives in a namespace. We do
20735 this by looking for a member function; its demangled name will
20736 contain namespace info, if there is any.
20737 Return the computed name or NULL.
20738 Space for the result is allocated on the objfile's obstack.
20739 This is the full-die version of guess_partial_die_structure_name.
20740 In this case we know DIE has no useful parent. */
20743 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
20745 struct die_info
*spec_die
;
20746 struct dwarf2_cu
*spec_cu
;
20747 struct die_info
*child
;
20750 spec_die
= die_specification (die
, &spec_cu
);
20751 if (spec_die
!= NULL
)
20757 for (child
= die
->child
;
20759 child
= child
->sibling
)
20761 if (child
->tag
== DW_TAG_subprogram
)
20763 const char *linkage_name
= dw2_linkage_name (child
, cu
);
20765 if (linkage_name
!= NULL
)
20768 = language_class_name_from_physname (cu
->language_defn
,
20772 if (actual_name
!= NULL
)
20774 const char *die_name
= dwarf2_name (die
, cu
);
20776 if (die_name
!= NULL
20777 && strcmp (die_name
, actual_name
) != 0)
20779 /* Strip off the class name from the full name.
20780 We want the prefix. */
20781 int die_name_len
= strlen (die_name
);
20782 int actual_name_len
= strlen (actual_name
);
20784 /* Test for '::' as a sanity check. */
20785 if (actual_name_len
> die_name_len
+ 2
20786 && actual_name
[actual_name_len
20787 - die_name_len
- 1] == ':')
20788 name
= (char *) obstack_copy0 (
20789 &cu
->objfile
->per_bfd
->storage_obstack
,
20790 actual_name
, actual_name_len
- die_name_len
- 2);
20793 xfree (actual_name
);
20802 /* GCC might emit a nameless typedef that has a linkage name. Determine the
20803 prefix part in such case. See
20804 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
20806 static const char *
20807 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
20809 struct attribute
*attr
;
20812 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
20813 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
20816 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
20819 attr
= dw2_linkage_name_attr (die
, cu
);
20820 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
20823 /* dwarf2_name had to be already called. */
20824 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
20826 /* Strip the base name, keep any leading namespaces/classes. */
20827 base
= strrchr (DW_STRING (attr
), ':');
20828 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
20831 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
20833 &base
[-1] - DW_STRING (attr
));
20836 /* Return the name of the namespace/class that DIE is defined within,
20837 or "" if we can't tell. The caller should not xfree the result.
20839 For example, if we're within the method foo() in the following
20849 then determine_prefix on foo's die will return "N::C". */
20851 static const char *
20852 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
20854 struct die_info
*parent
, *spec_die
;
20855 struct dwarf2_cu
*spec_cu
;
20856 struct type
*parent_type
;
20857 const char *retval
;
20859 if (cu
->language
!= language_cplus
20860 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
20861 && cu
->language
!= language_rust
)
20864 retval
= anonymous_struct_prefix (die
, cu
);
20868 /* We have to be careful in the presence of DW_AT_specification.
20869 For example, with GCC 3.4, given the code
20873 // Definition of N::foo.
20877 then we'll have a tree of DIEs like this:
20879 1: DW_TAG_compile_unit
20880 2: DW_TAG_namespace // N
20881 3: DW_TAG_subprogram // declaration of N::foo
20882 4: DW_TAG_subprogram // definition of N::foo
20883 DW_AT_specification // refers to die #3
20885 Thus, when processing die #4, we have to pretend that we're in
20886 the context of its DW_AT_specification, namely the contex of die
20889 spec_die
= die_specification (die
, &spec_cu
);
20890 if (spec_die
== NULL
)
20891 parent
= die
->parent
;
20894 parent
= spec_die
->parent
;
20898 if (parent
== NULL
)
20900 else if (parent
->building_fullname
)
20903 const char *parent_name
;
20905 /* It has been seen on RealView 2.2 built binaries,
20906 DW_TAG_template_type_param types actually _defined_ as
20907 children of the parent class:
20910 template class <class Enum> Class{};
20911 Class<enum E> class_e;
20913 1: DW_TAG_class_type (Class)
20914 2: DW_TAG_enumeration_type (E)
20915 3: DW_TAG_enumerator (enum1:0)
20916 3: DW_TAG_enumerator (enum2:1)
20918 2: DW_TAG_template_type_param
20919 DW_AT_type DW_FORM_ref_udata (E)
20921 Besides being broken debug info, it can put GDB into an
20922 infinite loop. Consider:
20924 When we're building the full name for Class<E>, we'll start
20925 at Class, and go look over its template type parameters,
20926 finding E. We'll then try to build the full name of E, and
20927 reach here. We're now trying to build the full name of E,
20928 and look over the parent DIE for containing scope. In the
20929 broken case, if we followed the parent DIE of E, we'd again
20930 find Class, and once again go look at its template type
20931 arguments, etc., etc. Simply don't consider such parent die
20932 as source-level parent of this die (it can't be, the language
20933 doesn't allow it), and break the loop here. */
20934 name
= dwarf2_name (die
, cu
);
20935 parent_name
= dwarf2_name (parent
, cu
);
20936 complaint (&symfile_complaints
,
20937 _("template param type '%s' defined within parent '%s'"),
20938 name
? name
: "<unknown>",
20939 parent_name
? parent_name
: "<unknown>");
20943 switch (parent
->tag
)
20945 case DW_TAG_namespace
:
20946 parent_type
= read_type_die (parent
, cu
);
20947 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
20948 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
20949 Work around this problem here. */
20950 if (cu
->language
== language_cplus
20951 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
20953 /* We give a name to even anonymous namespaces. */
20954 return TYPE_TAG_NAME (parent_type
);
20955 case DW_TAG_class_type
:
20956 case DW_TAG_interface_type
:
20957 case DW_TAG_structure_type
:
20958 case DW_TAG_union_type
:
20959 case DW_TAG_module
:
20960 parent_type
= read_type_die (parent
, cu
);
20961 if (TYPE_TAG_NAME (parent_type
) != NULL
)
20962 return TYPE_TAG_NAME (parent_type
);
20964 /* An anonymous structure is only allowed non-static data
20965 members; no typedefs, no member functions, et cetera.
20966 So it does not need a prefix. */
20968 case DW_TAG_compile_unit
:
20969 case DW_TAG_partial_unit
:
20970 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
20971 if (cu
->language
== language_cplus
20972 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
20973 && die
->child
!= NULL
20974 && (die
->tag
== DW_TAG_class_type
20975 || die
->tag
== DW_TAG_structure_type
20976 || die
->tag
== DW_TAG_union_type
))
20978 char *name
= guess_full_die_structure_name (die
, cu
);
20983 case DW_TAG_enumeration_type
:
20984 parent_type
= read_type_die (parent
, cu
);
20985 if (TYPE_DECLARED_CLASS (parent_type
))
20987 if (TYPE_TAG_NAME (parent_type
) != NULL
)
20988 return TYPE_TAG_NAME (parent_type
);
20991 /* Fall through. */
20993 return determine_prefix (parent
, cu
);
20997 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
20998 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
20999 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
21000 an obconcat, otherwise allocate storage for the result. The CU argument is
21001 used to determine the language and hence, the appropriate separator. */
21003 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
21006 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
21007 int physname
, struct dwarf2_cu
*cu
)
21009 const char *lead
= "";
21012 if (suffix
== NULL
|| suffix
[0] == '\0'
21013 || prefix
== NULL
|| prefix
[0] == '\0')
21015 else if (cu
->language
== language_d
)
21017 /* For D, the 'main' function could be defined in any module, but it
21018 should never be prefixed. */
21019 if (strcmp (suffix
, "D main") == 0)
21027 else if (cu
->language
== language_fortran
&& physname
)
21029 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
21030 DW_AT_MIPS_linkage_name is preferred and used instead. */
21038 if (prefix
== NULL
)
21040 if (suffix
== NULL
)
21047 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
21049 strcpy (retval
, lead
);
21050 strcat (retval
, prefix
);
21051 strcat (retval
, sep
);
21052 strcat (retval
, suffix
);
21057 /* We have an obstack. */
21058 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
21062 /* Return sibling of die, NULL if no sibling. */
21064 static struct die_info
*
21065 sibling_die (struct die_info
*die
)
21067 return die
->sibling
;
21070 /* Get name of a die, return NULL if not found. */
21072 static const char *
21073 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
21074 struct obstack
*obstack
)
21076 if (name
&& cu
->language
== language_cplus
)
21078 std::string canon_name
= cp_canonicalize_string (name
);
21080 if (!canon_name
.empty ())
21082 if (canon_name
!= name
)
21083 name
= (const char *) obstack_copy0 (obstack
,
21084 canon_name
.c_str (),
21085 canon_name
.length ());
21092 /* Get name of a die, return NULL if not found.
21093 Anonymous namespaces are converted to their magic string. */
21095 static const char *
21096 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21098 struct attribute
*attr
;
21100 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
21101 if ((!attr
|| !DW_STRING (attr
))
21102 && die
->tag
!= DW_TAG_namespace
21103 && die
->tag
!= DW_TAG_class_type
21104 && die
->tag
!= DW_TAG_interface_type
21105 && die
->tag
!= DW_TAG_structure_type
21106 && die
->tag
!= DW_TAG_union_type
)
21111 case DW_TAG_compile_unit
:
21112 case DW_TAG_partial_unit
:
21113 /* Compilation units have a DW_AT_name that is a filename, not
21114 a source language identifier. */
21115 case DW_TAG_enumeration_type
:
21116 case DW_TAG_enumerator
:
21117 /* These tags always have simple identifiers already; no need
21118 to canonicalize them. */
21119 return DW_STRING (attr
);
21121 case DW_TAG_namespace
:
21122 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
21123 return DW_STRING (attr
);
21124 return CP_ANONYMOUS_NAMESPACE_STR
;
21126 case DW_TAG_class_type
:
21127 case DW_TAG_interface_type
:
21128 case DW_TAG_structure_type
:
21129 case DW_TAG_union_type
:
21130 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
21131 structures or unions. These were of the form "._%d" in GCC 4.1,
21132 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
21133 and GCC 4.4. We work around this problem by ignoring these. */
21134 if (attr
&& DW_STRING (attr
)
21135 && (startswith (DW_STRING (attr
), "._")
21136 || startswith (DW_STRING (attr
), "<anonymous")))
21139 /* GCC might emit a nameless typedef that has a linkage name. See
21140 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21141 if (!attr
|| DW_STRING (attr
) == NULL
)
21143 char *demangled
= NULL
;
21145 attr
= dw2_linkage_name_attr (die
, cu
);
21146 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21149 /* Avoid demangling DW_STRING (attr) the second time on a second
21150 call for the same DIE. */
21151 if (!DW_STRING_IS_CANONICAL (attr
))
21152 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
21158 /* FIXME: we already did this for the partial symbol... */
21161 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
21162 demangled
, strlen (demangled
)));
21163 DW_STRING_IS_CANONICAL (attr
) = 1;
21166 /* Strip any leading namespaces/classes, keep only the base name.
21167 DW_AT_name for named DIEs does not contain the prefixes. */
21168 base
= strrchr (DW_STRING (attr
), ':');
21169 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
21172 return DW_STRING (attr
);
21181 if (!DW_STRING_IS_CANONICAL (attr
))
21184 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
21185 &cu
->objfile
->per_bfd
->storage_obstack
);
21186 DW_STRING_IS_CANONICAL (attr
) = 1;
21188 return DW_STRING (attr
);
21191 /* Return the die that this die in an extension of, or NULL if there
21192 is none. *EXT_CU is the CU containing DIE on input, and the CU
21193 containing the return value on output. */
21195 static struct die_info
*
21196 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
21198 struct attribute
*attr
;
21200 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
21204 return follow_die_ref (die
, attr
, ext_cu
);
21207 /* Convert a DIE tag into its string name. */
21209 static const char *
21210 dwarf_tag_name (unsigned tag
)
21212 const char *name
= get_DW_TAG_name (tag
);
21215 return "DW_TAG_<unknown>";
21220 /* Convert a DWARF attribute code into its string name. */
21222 static const char *
21223 dwarf_attr_name (unsigned attr
)
21227 #ifdef MIPS /* collides with DW_AT_HP_block_index */
21228 if (attr
== DW_AT_MIPS_fde
)
21229 return "DW_AT_MIPS_fde";
21231 if (attr
== DW_AT_HP_block_index
)
21232 return "DW_AT_HP_block_index";
21235 name
= get_DW_AT_name (attr
);
21238 return "DW_AT_<unknown>";
21243 /* Convert a DWARF value form code into its string name. */
21245 static const char *
21246 dwarf_form_name (unsigned form
)
21248 const char *name
= get_DW_FORM_name (form
);
21251 return "DW_FORM_<unknown>";
21256 static const char *
21257 dwarf_bool_name (unsigned mybool
)
21265 /* Convert a DWARF type code into its string name. */
21267 static const char *
21268 dwarf_type_encoding_name (unsigned enc
)
21270 const char *name
= get_DW_ATE_name (enc
);
21273 return "DW_ATE_<unknown>";
21279 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
21283 print_spaces (indent
, f
);
21284 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
21285 dwarf_tag_name (die
->tag
), die
->abbrev
,
21286 to_underlying (die
->sect_off
));
21288 if (die
->parent
!= NULL
)
21290 print_spaces (indent
, f
);
21291 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
21292 to_underlying (die
->parent
->sect_off
));
21295 print_spaces (indent
, f
);
21296 fprintf_unfiltered (f
, " has children: %s\n",
21297 dwarf_bool_name (die
->child
!= NULL
));
21299 print_spaces (indent
, f
);
21300 fprintf_unfiltered (f
, " attributes:\n");
21302 for (i
= 0; i
< die
->num_attrs
; ++i
)
21304 print_spaces (indent
, f
);
21305 fprintf_unfiltered (f
, " %s (%s) ",
21306 dwarf_attr_name (die
->attrs
[i
].name
),
21307 dwarf_form_name (die
->attrs
[i
].form
));
21309 switch (die
->attrs
[i
].form
)
21312 case DW_FORM_GNU_addr_index
:
21313 fprintf_unfiltered (f
, "address: ");
21314 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
21316 case DW_FORM_block2
:
21317 case DW_FORM_block4
:
21318 case DW_FORM_block
:
21319 case DW_FORM_block1
:
21320 fprintf_unfiltered (f
, "block: size %s",
21321 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21323 case DW_FORM_exprloc
:
21324 fprintf_unfiltered (f
, "expression: size %s",
21325 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21327 case DW_FORM_data16
:
21328 fprintf_unfiltered (f
, "constant of 16 bytes");
21330 case DW_FORM_ref_addr
:
21331 fprintf_unfiltered (f
, "ref address: ");
21332 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21334 case DW_FORM_GNU_ref_alt
:
21335 fprintf_unfiltered (f
, "alt ref address: ");
21336 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21342 case DW_FORM_ref_udata
:
21343 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
21344 (long) (DW_UNSND (&die
->attrs
[i
])));
21346 case DW_FORM_data1
:
21347 case DW_FORM_data2
:
21348 case DW_FORM_data4
:
21349 case DW_FORM_data8
:
21350 case DW_FORM_udata
:
21351 case DW_FORM_sdata
:
21352 fprintf_unfiltered (f
, "constant: %s",
21353 pulongest (DW_UNSND (&die
->attrs
[i
])));
21355 case DW_FORM_sec_offset
:
21356 fprintf_unfiltered (f
, "section offset: %s",
21357 pulongest (DW_UNSND (&die
->attrs
[i
])));
21359 case DW_FORM_ref_sig8
:
21360 fprintf_unfiltered (f
, "signature: %s",
21361 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
21363 case DW_FORM_string
:
21365 case DW_FORM_line_strp
:
21366 case DW_FORM_GNU_str_index
:
21367 case DW_FORM_GNU_strp_alt
:
21368 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
21369 DW_STRING (&die
->attrs
[i
])
21370 ? DW_STRING (&die
->attrs
[i
]) : "",
21371 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
21374 if (DW_UNSND (&die
->attrs
[i
]))
21375 fprintf_unfiltered (f
, "flag: TRUE");
21377 fprintf_unfiltered (f
, "flag: FALSE");
21379 case DW_FORM_flag_present
:
21380 fprintf_unfiltered (f
, "flag: TRUE");
21382 case DW_FORM_indirect
:
21383 /* The reader will have reduced the indirect form to
21384 the "base form" so this form should not occur. */
21385 fprintf_unfiltered (f
,
21386 "unexpected attribute form: DW_FORM_indirect");
21388 case DW_FORM_implicit_const
:
21389 fprintf_unfiltered (f
, "constant: %s",
21390 plongest (DW_SND (&die
->attrs
[i
])));
21393 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
21394 die
->attrs
[i
].form
);
21397 fprintf_unfiltered (f
, "\n");
21402 dump_die_for_error (struct die_info
*die
)
21404 dump_die_shallow (gdb_stderr
, 0, die
);
21408 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
21410 int indent
= level
* 4;
21412 gdb_assert (die
!= NULL
);
21414 if (level
>= max_level
)
21417 dump_die_shallow (f
, indent
, die
);
21419 if (die
->child
!= NULL
)
21421 print_spaces (indent
, f
);
21422 fprintf_unfiltered (f
, " Children:");
21423 if (level
+ 1 < max_level
)
21425 fprintf_unfiltered (f
, "\n");
21426 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
21430 fprintf_unfiltered (f
,
21431 " [not printed, max nesting level reached]\n");
21435 if (die
->sibling
!= NULL
&& level
> 0)
21437 dump_die_1 (f
, level
, max_level
, die
->sibling
);
21441 /* This is called from the pdie macro in gdbinit.in.
21442 It's not static so gcc will keep a copy callable from gdb. */
21445 dump_die (struct die_info
*die
, int max_level
)
21447 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
21451 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
21455 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
21456 to_underlying (die
->sect_off
),
21462 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
21466 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
21468 if (attr_form_is_ref (attr
))
21469 return (sect_offset
) DW_UNSND (attr
);
21471 complaint (&symfile_complaints
,
21472 _("unsupported die ref attribute form: '%s'"),
21473 dwarf_form_name (attr
->form
));
21477 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
21478 * the value held by the attribute is not constant. */
21481 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
21483 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
21484 return DW_SND (attr
);
21485 else if (attr
->form
== DW_FORM_udata
21486 || attr
->form
== DW_FORM_data1
21487 || attr
->form
== DW_FORM_data2
21488 || attr
->form
== DW_FORM_data4
21489 || attr
->form
== DW_FORM_data8
)
21490 return DW_UNSND (attr
);
21493 /* For DW_FORM_data16 see attr_form_is_constant. */
21494 complaint (&symfile_complaints
,
21495 _("Attribute value is not a constant (%s)"),
21496 dwarf_form_name (attr
->form
));
21497 return default_value
;
21501 /* Follow reference or signature attribute ATTR of SRC_DIE.
21502 On entry *REF_CU is the CU of SRC_DIE.
21503 On exit *REF_CU is the CU of the result. */
21505 static struct die_info
*
21506 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
21507 struct dwarf2_cu
**ref_cu
)
21509 struct die_info
*die
;
21511 if (attr_form_is_ref (attr
))
21512 die
= follow_die_ref (src_die
, attr
, ref_cu
);
21513 else if (attr
->form
== DW_FORM_ref_sig8
)
21514 die
= follow_die_sig (src_die
, attr
, ref_cu
);
21517 dump_die_for_error (src_die
);
21518 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
21519 objfile_name ((*ref_cu
)->objfile
));
21525 /* Follow reference OFFSET.
21526 On entry *REF_CU is the CU of the source die referencing OFFSET.
21527 On exit *REF_CU is the CU of the result.
21528 Returns NULL if OFFSET is invalid. */
21530 static struct die_info
*
21531 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
21532 struct dwarf2_cu
**ref_cu
)
21534 struct die_info temp_die
;
21535 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
21537 gdb_assert (cu
->per_cu
!= NULL
);
21541 if (cu
->per_cu
->is_debug_types
)
21543 /* .debug_types CUs cannot reference anything outside their CU.
21544 If they need to, they have to reference a signatured type via
21545 DW_FORM_ref_sig8. */
21546 if (!offset_in_cu_p (&cu
->header
, sect_off
))
21549 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
21550 || !offset_in_cu_p (&cu
->header
, sect_off
))
21552 struct dwarf2_per_cu_data
*per_cu
;
21554 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
21557 /* If necessary, add it to the queue and load its DIEs. */
21558 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
21559 load_full_comp_unit (per_cu
, cu
->language
);
21561 target_cu
= per_cu
->cu
;
21563 else if (cu
->dies
== NULL
)
21565 /* We're loading full DIEs during partial symbol reading. */
21566 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
21567 load_full_comp_unit (cu
->per_cu
, language_minimal
);
21570 *ref_cu
= target_cu
;
21571 temp_die
.sect_off
= sect_off
;
21572 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
21574 to_underlying (sect_off
));
21577 /* Follow reference attribute ATTR of SRC_DIE.
21578 On entry *REF_CU is the CU of SRC_DIE.
21579 On exit *REF_CU is the CU of the result. */
21581 static struct die_info
*
21582 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
21583 struct dwarf2_cu
**ref_cu
)
21585 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21586 struct dwarf2_cu
*cu
= *ref_cu
;
21587 struct die_info
*die
;
21589 die
= follow_die_offset (sect_off
,
21590 (attr
->form
== DW_FORM_GNU_ref_alt
21591 || cu
->per_cu
->is_dwz
),
21594 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
21595 "at 0x%x [in module %s]"),
21596 to_underlying (sect_off
), to_underlying (src_die
->sect_off
),
21597 objfile_name (cu
->objfile
));
21602 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
21603 Returned value is intended for DW_OP_call*. Returned
21604 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
21606 struct dwarf2_locexpr_baton
21607 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
21608 struct dwarf2_per_cu_data
*per_cu
,
21609 CORE_ADDR (*get_frame_pc
) (void *baton
),
21612 struct dwarf2_cu
*cu
;
21613 struct die_info
*die
;
21614 struct attribute
*attr
;
21615 struct dwarf2_locexpr_baton retval
;
21617 dw2_setup (per_cu
->objfile
);
21619 if (per_cu
->cu
== NULL
)
21624 /* We shouldn't get here for a dummy CU, but don't crash on the user.
21625 Instead just throw an error, not much else we can do. */
21626 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
21627 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21630 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
21632 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
21633 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21635 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21638 /* DWARF: "If there is no such attribute, then there is no effect.".
21639 DATA is ignored if SIZE is 0. */
21641 retval
.data
= NULL
;
21644 else if (attr_form_is_section_offset (attr
))
21646 struct dwarf2_loclist_baton loclist_baton
;
21647 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
21650 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
21652 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
21654 retval
.size
= size
;
21658 if (!attr_form_is_block (attr
))
21659 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
21660 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
21661 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21663 retval
.data
= DW_BLOCK (attr
)->data
;
21664 retval
.size
= DW_BLOCK (attr
)->size
;
21666 retval
.per_cu
= cu
->per_cu
;
21668 age_cached_comp_units ();
21673 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
21676 struct dwarf2_locexpr_baton
21677 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
21678 struct dwarf2_per_cu_data
*per_cu
,
21679 CORE_ADDR (*get_frame_pc
) (void *baton
),
21682 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
21684 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
21687 /* Write a constant of a given type as target-ordered bytes into
21690 static const gdb_byte
*
21691 write_constant_as_bytes (struct obstack
*obstack
,
21692 enum bfd_endian byte_order
,
21699 *len
= TYPE_LENGTH (type
);
21700 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
21701 store_unsigned_integer (result
, *len
, byte_order
, value
);
21706 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
21707 pointer to the constant bytes and set LEN to the length of the
21708 data. If memory is needed, allocate it on OBSTACK. If the DIE
21709 does not have a DW_AT_const_value, return NULL. */
21712 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
21713 struct dwarf2_per_cu_data
*per_cu
,
21714 struct obstack
*obstack
,
21717 struct dwarf2_cu
*cu
;
21718 struct die_info
*die
;
21719 struct attribute
*attr
;
21720 const gdb_byte
*result
= NULL
;
21723 enum bfd_endian byte_order
;
21725 dw2_setup (per_cu
->objfile
);
21727 if (per_cu
->cu
== NULL
)
21732 /* We shouldn't get here for a dummy CU, but don't crash on the user.
21733 Instead just throw an error, not much else we can do. */
21734 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
21735 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21738 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
21740 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
21741 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21744 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21748 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
21749 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21751 switch (attr
->form
)
21754 case DW_FORM_GNU_addr_index
:
21758 *len
= cu
->header
.addr_size
;
21759 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
21760 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
21764 case DW_FORM_string
:
21766 case DW_FORM_GNU_str_index
:
21767 case DW_FORM_GNU_strp_alt
:
21768 /* DW_STRING is already allocated on the objfile obstack, point
21770 result
= (const gdb_byte
*) DW_STRING (attr
);
21771 *len
= strlen (DW_STRING (attr
));
21773 case DW_FORM_block1
:
21774 case DW_FORM_block2
:
21775 case DW_FORM_block4
:
21776 case DW_FORM_block
:
21777 case DW_FORM_exprloc
:
21778 case DW_FORM_data16
:
21779 result
= DW_BLOCK (attr
)->data
;
21780 *len
= DW_BLOCK (attr
)->size
;
21783 /* The DW_AT_const_value attributes are supposed to carry the
21784 symbol's value "represented as it would be on the target
21785 architecture." By the time we get here, it's already been
21786 converted to host endianness, so we just need to sign- or
21787 zero-extend it as appropriate. */
21788 case DW_FORM_data1
:
21789 type
= die_type (die
, cu
);
21790 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
21791 if (result
== NULL
)
21792 result
= write_constant_as_bytes (obstack
, byte_order
,
21795 case DW_FORM_data2
:
21796 type
= die_type (die
, cu
);
21797 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
21798 if (result
== NULL
)
21799 result
= write_constant_as_bytes (obstack
, byte_order
,
21802 case DW_FORM_data4
:
21803 type
= die_type (die
, cu
);
21804 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
21805 if (result
== NULL
)
21806 result
= write_constant_as_bytes (obstack
, byte_order
,
21809 case DW_FORM_data8
:
21810 type
= die_type (die
, cu
);
21811 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
21812 if (result
== NULL
)
21813 result
= write_constant_as_bytes (obstack
, byte_order
,
21817 case DW_FORM_sdata
:
21818 case DW_FORM_implicit_const
:
21819 type
= die_type (die
, cu
);
21820 result
= write_constant_as_bytes (obstack
, byte_order
,
21821 type
, DW_SND (attr
), len
);
21824 case DW_FORM_udata
:
21825 type
= die_type (die
, cu
);
21826 result
= write_constant_as_bytes (obstack
, byte_order
,
21827 type
, DW_UNSND (attr
), len
);
21831 complaint (&symfile_complaints
,
21832 _("unsupported const value attribute form: '%s'"),
21833 dwarf_form_name (attr
->form
));
21840 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
21841 valid type for this die is found. */
21844 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
21845 struct dwarf2_per_cu_data
*per_cu
)
21847 struct dwarf2_cu
*cu
;
21848 struct die_info
*die
;
21850 dw2_setup (per_cu
->objfile
);
21852 if (per_cu
->cu
== NULL
)
21858 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
21862 return die_type (die
, cu
);
21865 /* Return the type of the DIE at DIE_OFFSET in the CU named by
21869 dwarf2_get_die_type (cu_offset die_offset
,
21870 struct dwarf2_per_cu_data
*per_cu
)
21872 dw2_setup (per_cu
->objfile
);
21874 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
21875 return get_die_type_at_offset (die_offset_sect
, per_cu
);
21878 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
21879 On entry *REF_CU is the CU of SRC_DIE.
21880 On exit *REF_CU is the CU of the result.
21881 Returns NULL if the referenced DIE isn't found. */
21883 static struct die_info
*
21884 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
21885 struct dwarf2_cu
**ref_cu
)
21887 struct die_info temp_die
;
21888 struct dwarf2_cu
*sig_cu
;
21889 struct die_info
*die
;
21891 /* While it might be nice to assert sig_type->type == NULL here,
21892 we can get here for DW_AT_imported_declaration where we need
21893 the DIE not the type. */
21895 /* If necessary, add it to the queue and load its DIEs. */
21897 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
21898 read_signatured_type (sig_type
);
21900 sig_cu
= sig_type
->per_cu
.cu
;
21901 gdb_assert (sig_cu
!= NULL
);
21902 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
21903 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
21904 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
21905 to_underlying (temp_die
.sect_off
));
21908 /* For .gdb_index version 7 keep track of included TUs.
21909 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
21910 if (dwarf2_per_objfile
->index_table
!= NULL
21911 && dwarf2_per_objfile
->index_table
->version
<= 7)
21913 VEC_safe_push (dwarf2_per_cu_ptr
,
21914 (*ref_cu
)->per_cu
->imported_symtabs
,
21925 /* Follow signatured type referenced by ATTR in SRC_DIE.
21926 On entry *REF_CU is the CU of SRC_DIE.
21927 On exit *REF_CU is the CU of the result.
21928 The result is the DIE of the type.
21929 If the referenced type cannot be found an error is thrown. */
21931 static struct die_info
*
21932 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
21933 struct dwarf2_cu
**ref_cu
)
21935 ULONGEST signature
= DW_SIGNATURE (attr
);
21936 struct signatured_type
*sig_type
;
21937 struct die_info
*die
;
21939 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
21941 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
21942 /* sig_type will be NULL if the signatured type is missing from
21944 if (sig_type
== NULL
)
21946 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
21947 " from DIE at 0x%x [in module %s]"),
21948 hex_string (signature
), to_underlying (src_die
->sect_off
),
21949 objfile_name ((*ref_cu
)->objfile
));
21952 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
21955 dump_die_for_error (src_die
);
21956 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
21957 " from DIE at 0x%x [in module %s]"),
21958 hex_string (signature
), to_underlying (src_die
->sect_off
),
21959 objfile_name ((*ref_cu
)->objfile
));
21965 /* Get the type specified by SIGNATURE referenced in DIE/CU,
21966 reading in and processing the type unit if necessary. */
21968 static struct type
*
21969 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
21970 struct dwarf2_cu
*cu
)
21972 struct signatured_type
*sig_type
;
21973 struct dwarf2_cu
*type_cu
;
21974 struct die_info
*type_die
;
21977 sig_type
= lookup_signatured_type (cu
, signature
);
21978 /* sig_type will be NULL if the signatured type is missing from
21980 if (sig_type
== NULL
)
21982 complaint (&symfile_complaints
,
21983 _("Dwarf Error: Cannot find signatured DIE %s referenced"
21984 " from DIE at 0x%x [in module %s]"),
21985 hex_string (signature
), to_underlying (die
->sect_off
),
21986 objfile_name (dwarf2_per_objfile
->objfile
));
21987 return build_error_marker_type (cu
, die
);
21990 /* If we already know the type we're done. */
21991 if (sig_type
->type
!= NULL
)
21992 return sig_type
->type
;
21995 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
21996 if (type_die
!= NULL
)
21998 /* N.B. We need to call get_die_type to ensure only one type for this DIE
21999 is created. This is important, for example, because for c++ classes
22000 we need TYPE_NAME set which is only done by new_symbol. Blech. */
22001 type
= read_type_die (type_die
, type_cu
);
22004 complaint (&symfile_complaints
,
22005 _("Dwarf Error: Cannot build signatured type %s"
22006 " referenced from DIE at 0x%x [in module %s]"),
22007 hex_string (signature
), to_underlying (die
->sect_off
),
22008 objfile_name (dwarf2_per_objfile
->objfile
));
22009 type
= build_error_marker_type (cu
, die
);
22014 complaint (&symfile_complaints
,
22015 _("Dwarf Error: Problem reading signatured DIE %s referenced"
22016 " from DIE at 0x%x [in module %s]"),
22017 hex_string (signature
), to_underlying (die
->sect_off
),
22018 objfile_name (dwarf2_per_objfile
->objfile
));
22019 type
= build_error_marker_type (cu
, die
);
22021 sig_type
->type
= type
;
22026 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
22027 reading in and processing the type unit if necessary. */
22029 static struct type
*
22030 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
22031 struct dwarf2_cu
*cu
) /* ARI: editCase function */
22033 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
22034 if (attr_form_is_ref (attr
))
22036 struct dwarf2_cu
*type_cu
= cu
;
22037 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
22039 return read_type_die (type_die
, type_cu
);
22041 else if (attr
->form
== DW_FORM_ref_sig8
)
22043 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
22047 complaint (&symfile_complaints
,
22048 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
22049 " at 0x%x [in module %s]"),
22050 dwarf_form_name (attr
->form
), to_underlying (die
->sect_off
),
22051 objfile_name (dwarf2_per_objfile
->objfile
));
22052 return build_error_marker_type (cu
, die
);
22056 /* Load the DIEs associated with type unit PER_CU into memory. */
22059 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
22061 struct signatured_type
*sig_type
;
22063 /* Caller is responsible for ensuring type_unit_groups don't get here. */
22064 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
22066 /* We have the per_cu, but we need the signatured_type.
22067 Fortunately this is an easy translation. */
22068 gdb_assert (per_cu
->is_debug_types
);
22069 sig_type
= (struct signatured_type
*) per_cu
;
22071 gdb_assert (per_cu
->cu
== NULL
);
22073 read_signatured_type (sig_type
);
22075 gdb_assert (per_cu
->cu
!= NULL
);
22078 /* die_reader_func for read_signatured_type.
22079 This is identical to load_full_comp_unit_reader,
22080 but is kept separate for now. */
22083 read_signatured_type_reader (const struct die_reader_specs
*reader
,
22084 const gdb_byte
*info_ptr
,
22085 struct die_info
*comp_unit_die
,
22089 struct dwarf2_cu
*cu
= reader
->cu
;
22091 gdb_assert (cu
->die_hash
== NULL
);
22093 htab_create_alloc_ex (cu
->header
.length
/ 12,
22097 &cu
->comp_unit_obstack
,
22098 hashtab_obstack_allocate
,
22099 dummy_obstack_deallocate
);
22102 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
22103 &info_ptr
, comp_unit_die
);
22104 cu
->dies
= comp_unit_die
;
22105 /* comp_unit_die is not stored in die_hash, no need. */
22107 /* We try not to read any attributes in this function, because not
22108 all CUs needed for references have been loaded yet, and symbol
22109 table processing isn't initialized. But we have to set the CU language,
22110 or we won't be able to build types correctly.
22111 Similarly, if we do not read the producer, we can not apply
22112 producer-specific interpretation. */
22113 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
22116 /* Read in a signatured type and build its CU and DIEs.
22117 If the type is a stub for the real type in a DWO file,
22118 read in the real type from the DWO file as well. */
22121 read_signatured_type (struct signatured_type
*sig_type
)
22123 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
22125 gdb_assert (per_cu
->is_debug_types
);
22126 gdb_assert (per_cu
->cu
== NULL
);
22128 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
22129 read_signatured_type_reader
, NULL
);
22130 sig_type
->per_cu
.tu_read
= 1;
22133 /* Decode simple location descriptions.
22134 Given a pointer to a dwarf block that defines a location, compute
22135 the location and return the value.
22137 NOTE drow/2003-11-18: This function is called in two situations
22138 now: for the address of static or global variables (partial symbols
22139 only) and for offsets into structures which are expected to be
22140 (more or less) constant. The partial symbol case should go away,
22141 and only the constant case should remain. That will let this
22142 function complain more accurately. A few special modes are allowed
22143 without complaint for global variables (for instance, global
22144 register values and thread-local values).
22146 A location description containing no operations indicates that the
22147 object is optimized out. The return value is 0 for that case.
22148 FIXME drow/2003-11-16: No callers check for this case any more; soon all
22149 callers will only want a very basic result and this can become a
22152 Note that stack[0] is unused except as a default error return. */
22155 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
22157 struct objfile
*objfile
= cu
->objfile
;
22159 size_t size
= blk
->size
;
22160 const gdb_byte
*data
= blk
->data
;
22161 CORE_ADDR stack
[64];
22163 unsigned int bytes_read
, unsnd
;
22169 stack
[++stacki
] = 0;
22208 stack
[++stacki
] = op
- DW_OP_lit0
;
22243 stack
[++stacki
] = op
- DW_OP_reg0
;
22245 dwarf2_complex_location_expr_complaint ();
22249 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
22251 stack
[++stacki
] = unsnd
;
22253 dwarf2_complex_location_expr_complaint ();
22257 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
22262 case DW_OP_const1u
:
22263 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
22267 case DW_OP_const1s
:
22268 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
22272 case DW_OP_const2u
:
22273 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
22277 case DW_OP_const2s
:
22278 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
22282 case DW_OP_const4u
:
22283 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
22287 case DW_OP_const4s
:
22288 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
22292 case DW_OP_const8u
:
22293 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
22298 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
22304 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
22309 stack
[stacki
+ 1] = stack
[stacki
];
22314 stack
[stacki
- 1] += stack
[stacki
];
22318 case DW_OP_plus_uconst
:
22319 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
22325 stack
[stacki
- 1] -= stack
[stacki
];
22330 /* If we're not the last op, then we definitely can't encode
22331 this using GDB's address_class enum. This is valid for partial
22332 global symbols, although the variable's address will be bogus
22335 dwarf2_complex_location_expr_complaint ();
22338 case DW_OP_GNU_push_tls_address
:
22339 case DW_OP_form_tls_address
:
22340 /* The top of the stack has the offset from the beginning
22341 of the thread control block at which the variable is located. */
22342 /* Nothing should follow this operator, so the top of stack would
22344 /* This is valid for partial global symbols, but the variable's
22345 address will be bogus in the psymtab. Make it always at least
22346 non-zero to not look as a variable garbage collected by linker
22347 which have DW_OP_addr 0. */
22349 dwarf2_complex_location_expr_complaint ();
22353 case DW_OP_GNU_uninit
:
22356 case DW_OP_GNU_addr_index
:
22357 case DW_OP_GNU_const_index
:
22358 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
22365 const char *name
= get_DW_OP_name (op
);
22368 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
22371 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
22375 return (stack
[stacki
]);
22378 /* Enforce maximum stack depth of SIZE-1 to avoid writing
22379 outside of the allocated space. Also enforce minimum>0. */
22380 if (stacki
>= ARRAY_SIZE (stack
) - 1)
22382 complaint (&symfile_complaints
,
22383 _("location description stack overflow"));
22389 complaint (&symfile_complaints
,
22390 _("location description stack underflow"));
22394 return (stack
[stacki
]);
22397 /* memory allocation interface */
22399 static struct dwarf_block
*
22400 dwarf_alloc_block (struct dwarf2_cu
*cu
)
22402 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
22405 static struct die_info
*
22406 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
22408 struct die_info
*die
;
22409 size_t size
= sizeof (struct die_info
);
22412 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
22414 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
22415 memset (die
, 0, sizeof (struct die_info
));
22420 /* Macro support. */
22422 /* Return file name relative to the compilation directory of file number I in
22423 *LH's file name table. The result is allocated using xmalloc; the caller is
22424 responsible for freeing it. */
22427 file_file_name (int file
, struct line_header
*lh
)
22429 /* Is the file number a valid index into the line header's file name
22430 table? Remember that file numbers start with one, not zero. */
22431 if (1 <= file
&& file
<= lh
->file_names
.size ())
22433 const file_entry
&fe
= lh
->file_names
[file
- 1];
22435 if (!IS_ABSOLUTE_PATH (fe
.name
))
22437 const char *dir
= fe
.include_dir (lh
);
22439 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
22441 return xstrdup (fe
.name
);
22445 /* The compiler produced a bogus file number. We can at least
22446 record the macro definitions made in the file, even if we
22447 won't be able to find the file by name. */
22448 char fake_name
[80];
22450 xsnprintf (fake_name
, sizeof (fake_name
),
22451 "<bad macro file number %d>", file
);
22453 complaint (&symfile_complaints
,
22454 _("bad file number in macro information (%d)"),
22457 return xstrdup (fake_name
);
22461 /* Return the full name of file number I in *LH's file name table.
22462 Use COMP_DIR as the name of the current directory of the
22463 compilation. The result is allocated using xmalloc; the caller is
22464 responsible for freeing it. */
22466 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
22468 /* Is the file number a valid index into the line header's file name
22469 table? Remember that file numbers start with one, not zero. */
22470 if (1 <= file
&& file
<= lh
->file_names
.size ())
22472 char *relative
= file_file_name (file
, lh
);
22474 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
22476 return reconcat (relative
, comp_dir
, SLASH_STRING
,
22477 relative
, (char *) NULL
);
22480 return file_file_name (file
, lh
);
22484 static struct macro_source_file
*
22485 macro_start_file (int file
, int line
,
22486 struct macro_source_file
*current_file
,
22487 struct line_header
*lh
)
22489 /* File name relative to the compilation directory of this source file. */
22490 char *file_name
= file_file_name (file
, lh
);
22492 if (! current_file
)
22494 /* Note: We don't create a macro table for this compilation unit
22495 at all until we actually get a filename. */
22496 struct macro_table
*macro_table
= get_macro_table ();
22498 /* If we have no current file, then this must be the start_file
22499 directive for the compilation unit's main source file. */
22500 current_file
= macro_set_main (macro_table
, file_name
);
22501 macro_define_special (macro_table
);
22504 current_file
= macro_include (current_file
, line
, file_name
);
22508 return current_file
;
22511 static const char *
22512 consume_improper_spaces (const char *p
, const char *body
)
22516 complaint (&symfile_complaints
,
22517 _("macro definition contains spaces "
22518 "in formal argument list:\n`%s'"),
22530 parse_macro_definition (struct macro_source_file
*file
, int line
,
22535 /* The body string takes one of two forms. For object-like macro
22536 definitions, it should be:
22538 <macro name> " " <definition>
22540 For function-like macro definitions, it should be:
22542 <macro name> "() " <definition>
22544 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
22546 Spaces may appear only where explicitly indicated, and in the
22549 The Dwarf 2 spec says that an object-like macro's name is always
22550 followed by a space, but versions of GCC around March 2002 omit
22551 the space when the macro's definition is the empty string.
22553 The Dwarf 2 spec says that there should be no spaces between the
22554 formal arguments in a function-like macro's formal argument list,
22555 but versions of GCC around March 2002 include spaces after the
22559 /* Find the extent of the macro name. The macro name is terminated
22560 by either a space or null character (for an object-like macro) or
22561 an opening paren (for a function-like macro). */
22562 for (p
= body
; *p
; p
++)
22563 if (*p
== ' ' || *p
== '(')
22566 if (*p
== ' ' || *p
== '\0')
22568 /* It's an object-like macro. */
22569 int name_len
= p
- body
;
22570 char *name
= savestring (body
, name_len
);
22571 const char *replacement
;
22574 replacement
= body
+ name_len
+ 1;
22577 dwarf2_macro_malformed_definition_complaint (body
);
22578 replacement
= body
+ name_len
;
22581 macro_define_object (file
, line
, name
, replacement
);
22585 else if (*p
== '(')
22587 /* It's a function-like macro. */
22588 char *name
= savestring (body
, p
- body
);
22591 char **argv
= XNEWVEC (char *, argv_size
);
22595 p
= consume_improper_spaces (p
, body
);
22597 /* Parse the formal argument list. */
22598 while (*p
&& *p
!= ')')
22600 /* Find the extent of the current argument name. */
22601 const char *arg_start
= p
;
22603 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
22606 if (! *p
|| p
== arg_start
)
22607 dwarf2_macro_malformed_definition_complaint (body
);
22610 /* Make sure argv has room for the new argument. */
22611 if (argc
>= argv_size
)
22614 argv
= XRESIZEVEC (char *, argv
, argv_size
);
22617 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
22620 p
= consume_improper_spaces (p
, body
);
22622 /* Consume the comma, if present. */
22627 p
= consume_improper_spaces (p
, body
);
22636 /* Perfectly formed definition, no complaints. */
22637 macro_define_function (file
, line
, name
,
22638 argc
, (const char **) argv
,
22640 else if (*p
== '\0')
22642 /* Complain, but do define it. */
22643 dwarf2_macro_malformed_definition_complaint (body
);
22644 macro_define_function (file
, line
, name
,
22645 argc
, (const char **) argv
,
22649 /* Just complain. */
22650 dwarf2_macro_malformed_definition_complaint (body
);
22653 /* Just complain. */
22654 dwarf2_macro_malformed_definition_complaint (body
);
22660 for (i
= 0; i
< argc
; i
++)
22666 dwarf2_macro_malformed_definition_complaint (body
);
22669 /* Skip some bytes from BYTES according to the form given in FORM.
22670 Returns the new pointer. */
22672 static const gdb_byte
*
22673 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
22674 enum dwarf_form form
,
22675 unsigned int offset_size
,
22676 struct dwarf2_section_info
*section
)
22678 unsigned int bytes_read
;
22682 case DW_FORM_data1
:
22687 case DW_FORM_data2
:
22691 case DW_FORM_data4
:
22695 case DW_FORM_data8
:
22699 case DW_FORM_data16
:
22703 case DW_FORM_string
:
22704 read_direct_string (abfd
, bytes
, &bytes_read
);
22705 bytes
+= bytes_read
;
22708 case DW_FORM_sec_offset
:
22710 case DW_FORM_GNU_strp_alt
:
22711 bytes
+= offset_size
;
22714 case DW_FORM_block
:
22715 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
22716 bytes
+= bytes_read
;
22719 case DW_FORM_block1
:
22720 bytes
+= 1 + read_1_byte (abfd
, bytes
);
22722 case DW_FORM_block2
:
22723 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
22725 case DW_FORM_block4
:
22726 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
22729 case DW_FORM_sdata
:
22730 case DW_FORM_udata
:
22731 case DW_FORM_GNU_addr_index
:
22732 case DW_FORM_GNU_str_index
:
22733 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
22736 dwarf2_section_buffer_overflow_complaint (section
);
22741 case DW_FORM_implicit_const
:
22747 complaint (&symfile_complaints
,
22748 _("invalid form 0x%x in `%s'"),
22749 form
, get_section_name (section
));
22757 /* A helper for dwarf_decode_macros that handles skipping an unknown
22758 opcode. Returns an updated pointer to the macro data buffer; or,
22759 on error, issues a complaint and returns NULL. */
22761 static const gdb_byte
*
22762 skip_unknown_opcode (unsigned int opcode
,
22763 const gdb_byte
**opcode_definitions
,
22764 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
22766 unsigned int offset_size
,
22767 struct dwarf2_section_info
*section
)
22769 unsigned int bytes_read
, i
;
22771 const gdb_byte
*defn
;
22773 if (opcode_definitions
[opcode
] == NULL
)
22775 complaint (&symfile_complaints
,
22776 _("unrecognized DW_MACFINO opcode 0x%x"),
22781 defn
= opcode_definitions
[opcode
];
22782 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
22783 defn
+= bytes_read
;
22785 for (i
= 0; i
< arg
; ++i
)
22787 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
22788 (enum dwarf_form
) defn
[i
], offset_size
,
22790 if (mac_ptr
== NULL
)
22792 /* skip_form_bytes already issued the complaint. */
22800 /* A helper function which parses the header of a macro section.
22801 If the macro section is the extended (for now called "GNU") type,
22802 then this updates *OFFSET_SIZE. Returns a pointer to just after
22803 the header, or issues a complaint and returns NULL on error. */
22805 static const gdb_byte
*
22806 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
22808 const gdb_byte
*mac_ptr
,
22809 unsigned int *offset_size
,
22810 int section_is_gnu
)
22812 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
22814 if (section_is_gnu
)
22816 unsigned int version
, flags
;
22818 version
= read_2_bytes (abfd
, mac_ptr
);
22819 if (version
!= 4 && version
!= 5)
22821 complaint (&symfile_complaints
,
22822 _("unrecognized version `%d' in .debug_macro section"),
22828 flags
= read_1_byte (abfd
, mac_ptr
);
22830 *offset_size
= (flags
& 1) ? 8 : 4;
22832 if ((flags
& 2) != 0)
22833 /* We don't need the line table offset. */
22834 mac_ptr
+= *offset_size
;
22836 /* Vendor opcode descriptions. */
22837 if ((flags
& 4) != 0)
22839 unsigned int i
, count
;
22841 count
= read_1_byte (abfd
, mac_ptr
);
22843 for (i
= 0; i
< count
; ++i
)
22845 unsigned int opcode
, bytes_read
;
22848 opcode
= read_1_byte (abfd
, mac_ptr
);
22850 opcode_definitions
[opcode
] = mac_ptr
;
22851 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22852 mac_ptr
+= bytes_read
;
22861 /* A helper for dwarf_decode_macros that handles the GNU extensions,
22862 including DW_MACRO_import. */
22865 dwarf_decode_macro_bytes (bfd
*abfd
,
22866 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
22867 struct macro_source_file
*current_file
,
22868 struct line_header
*lh
,
22869 struct dwarf2_section_info
*section
,
22870 int section_is_gnu
, int section_is_dwz
,
22871 unsigned int offset_size
,
22872 htab_t include_hash
)
22874 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22875 enum dwarf_macro_record_type macinfo_type
;
22876 int at_commandline
;
22877 const gdb_byte
*opcode_definitions
[256];
22879 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
22880 &offset_size
, section_is_gnu
);
22881 if (mac_ptr
== NULL
)
22883 /* We already issued a complaint. */
22887 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
22888 GDB is still reading the definitions from command line. First
22889 DW_MACINFO_start_file will need to be ignored as it was already executed
22890 to create CURRENT_FILE for the main source holding also the command line
22891 definitions. On first met DW_MACINFO_start_file this flag is reset to
22892 normally execute all the remaining DW_MACINFO_start_file macinfos. */
22894 at_commandline
= 1;
22898 /* Do we at least have room for a macinfo type byte? */
22899 if (mac_ptr
>= mac_end
)
22901 dwarf2_section_buffer_overflow_complaint (section
);
22905 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
22908 /* Note that we rely on the fact that the corresponding GNU and
22909 DWARF constants are the same. */
22910 switch (macinfo_type
)
22912 /* A zero macinfo type indicates the end of the macro
22917 case DW_MACRO_define
:
22918 case DW_MACRO_undef
:
22919 case DW_MACRO_define_strp
:
22920 case DW_MACRO_undef_strp
:
22921 case DW_MACRO_define_sup
:
22922 case DW_MACRO_undef_sup
:
22924 unsigned int bytes_read
;
22929 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22930 mac_ptr
+= bytes_read
;
22932 if (macinfo_type
== DW_MACRO_define
22933 || macinfo_type
== DW_MACRO_undef
)
22935 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22936 mac_ptr
+= bytes_read
;
22940 LONGEST str_offset
;
22942 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
22943 mac_ptr
+= offset_size
;
22945 if (macinfo_type
== DW_MACRO_define_sup
22946 || macinfo_type
== DW_MACRO_undef_sup
22949 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
22951 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
22954 body
= read_indirect_string_at_offset (abfd
, str_offset
);
22957 is_define
= (macinfo_type
== DW_MACRO_define
22958 || macinfo_type
== DW_MACRO_define_strp
22959 || macinfo_type
== DW_MACRO_define_sup
);
22960 if (! current_file
)
22962 /* DWARF violation as no main source is present. */
22963 complaint (&symfile_complaints
,
22964 _("debug info with no main source gives macro %s "
22966 is_define
? _("definition") : _("undefinition"),
22970 if ((line
== 0 && !at_commandline
)
22971 || (line
!= 0 && at_commandline
))
22972 complaint (&symfile_complaints
,
22973 _("debug info gives %s macro %s with %s line %d: %s"),
22974 at_commandline
? _("command-line") : _("in-file"),
22975 is_define
? _("definition") : _("undefinition"),
22976 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
22979 parse_macro_definition (current_file
, line
, body
);
22982 gdb_assert (macinfo_type
== DW_MACRO_undef
22983 || macinfo_type
== DW_MACRO_undef_strp
22984 || macinfo_type
== DW_MACRO_undef_sup
);
22985 macro_undef (current_file
, line
, body
);
22990 case DW_MACRO_start_file
:
22992 unsigned int bytes_read
;
22995 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22996 mac_ptr
+= bytes_read
;
22997 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22998 mac_ptr
+= bytes_read
;
23000 if ((line
== 0 && !at_commandline
)
23001 || (line
!= 0 && at_commandline
))
23002 complaint (&symfile_complaints
,
23003 _("debug info gives source %d included "
23004 "from %s at %s line %d"),
23005 file
, at_commandline
? _("command-line") : _("file"),
23006 line
== 0 ? _("zero") : _("non-zero"), line
);
23008 if (at_commandline
)
23010 /* This DW_MACRO_start_file was executed in the
23012 at_commandline
= 0;
23015 current_file
= macro_start_file (file
, line
, current_file
, lh
);
23019 case DW_MACRO_end_file
:
23020 if (! current_file
)
23021 complaint (&symfile_complaints
,
23022 _("macro debug info has an unmatched "
23023 "`close_file' directive"));
23026 current_file
= current_file
->included_by
;
23027 if (! current_file
)
23029 enum dwarf_macro_record_type next_type
;
23031 /* GCC circa March 2002 doesn't produce the zero
23032 type byte marking the end of the compilation
23033 unit. Complain if it's not there, but exit no
23036 /* Do we at least have room for a macinfo type byte? */
23037 if (mac_ptr
>= mac_end
)
23039 dwarf2_section_buffer_overflow_complaint (section
);
23043 /* We don't increment mac_ptr here, so this is just
23046 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
23048 if (next_type
!= 0)
23049 complaint (&symfile_complaints
,
23050 _("no terminating 0-type entry for "
23051 "macros in `.debug_macinfo' section"));
23058 case DW_MACRO_import
:
23059 case DW_MACRO_import_sup
:
23063 bfd
*include_bfd
= abfd
;
23064 struct dwarf2_section_info
*include_section
= section
;
23065 const gdb_byte
*include_mac_end
= mac_end
;
23066 int is_dwz
= section_is_dwz
;
23067 const gdb_byte
*new_mac_ptr
;
23069 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
23070 mac_ptr
+= offset_size
;
23072 if (macinfo_type
== DW_MACRO_import_sup
)
23074 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
23076 dwarf2_read_section (objfile
, &dwz
->macro
);
23078 include_section
= &dwz
->macro
;
23079 include_bfd
= get_section_bfd_owner (include_section
);
23080 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
23084 new_mac_ptr
= include_section
->buffer
+ offset
;
23085 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
23089 /* This has actually happened; see
23090 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
23091 complaint (&symfile_complaints
,
23092 _("recursive DW_MACRO_import in "
23093 ".debug_macro section"));
23097 *slot
= (void *) new_mac_ptr
;
23099 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
23100 include_mac_end
, current_file
, lh
,
23101 section
, section_is_gnu
, is_dwz
,
23102 offset_size
, include_hash
);
23104 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
23109 case DW_MACINFO_vendor_ext
:
23110 if (!section_is_gnu
)
23112 unsigned int bytes_read
;
23114 /* This reads the constant, but since we don't recognize
23115 any vendor extensions, we ignore it. */
23116 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
23117 mac_ptr
+= bytes_read
;
23118 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
23119 mac_ptr
+= bytes_read
;
23121 /* We don't recognize any vendor extensions. */
23127 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
23128 mac_ptr
, mac_end
, abfd
, offset_size
,
23130 if (mac_ptr
== NULL
)
23134 } while (macinfo_type
!= 0);
23138 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
23139 int section_is_gnu
)
23141 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23142 struct line_header
*lh
= cu
->line_header
;
23144 const gdb_byte
*mac_ptr
, *mac_end
;
23145 struct macro_source_file
*current_file
= 0;
23146 enum dwarf_macro_record_type macinfo_type
;
23147 unsigned int offset_size
= cu
->header
.offset_size
;
23148 const gdb_byte
*opcode_definitions
[256];
23150 struct dwarf2_section_info
*section
;
23151 const char *section_name
;
23153 if (cu
->dwo_unit
!= NULL
)
23155 if (section_is_gnu
)
23157 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
23158 section_name
= ".debug_macro.dwo";
23162 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
23163 section_name
= ".debug_macinfo.dwo";
23168 if (section_is_gnu
)
23170 section
= &dwarf2_per_objfile
->macro
;
23171 section_name
= ".debug_macro";
23175 section
= &dwarf2_per_objfile
->macinfo
;
23176 section_name
= ".debug_macinfo";
23180 dwarf2_read_section (objfile
, section
);
23181 if (section
->buffer
== NULL
)
23183 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
23186 abfd
= get_section_bfd_owner (section
);
23188 /* First pass: Find the name of the base filename.
23189 This filename is needed in order to process all macros whose definition
23190 (or undefinition) comes from the command line. These macros are defined
23191 before the first DW_MACINFO_start_file entry, and yet still need to be
23192 associated to the base file.
23194 To determine the base file name, we scan the macro definitions until we
23195 reach the first DW_MACINFO_start_file entry. We then initialize
23196 CURRENT_FILE accordingly so that any macro definition found before the
23197 first DW_MACINFO_start_file can still be associated to the base file. */
23199 mac_ptr
= section
->buffer
+ offset
;
23200 mac_end
= section
->buffer
+ section
->size
;
23202 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
23203 &offset_size
, section_is_gnu
);
23204 if (mac_ptr
== NULL
)
23206 /* We already issued a complaint. */
23212 /* Do we at least have room for a macinfo type byte? */
23213 if (mac_ptr
>= mac_end
)
23215 /* Complaint is printed during the second pass as GDB will probably
23216 stop the first pass earlier upon finding
23217 DW_MACINFO_start_file. */
23221 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
23224 /* Note that we rely on the fact that the corresponding GNU and
23225 DWARF constants are the same. */
23226 switch (macinfo_type
)
23228 /* A zero macinfo type indicates the end of the macro
23233 case DW_MACRO_define
:
23234 case DW_MACRO_undef
:
23235 /* Only skip the data by MAC_PTR. */
23237 unsigned int bytes_read
;
23239 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
23240 mac_ptr
+= bytes_read
;
23241 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
23242 mac_ptr
+= bytes_read
;
23246 case DW_MACRO_start_file
:
23248 unsigned int bytes_read
;
23251 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
23252 mac_ptr
+= bytes_read
;
23253 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
23254 mac_ptr
+= bytes_read
;
23256 current_file
= macro_start_file (file
, line
, current_file
, lh
);
23260 case DW_MACRO_end_file
:
23261 /* No data to skip by MAC_PTR. */
23264 case DW_MACRO_define_strp
:
23265 case DW_MACRO_undef_strp
:
23266 case DW_MACRO_define_sup
:
23267 case DW_MACRO_undef_sup
:
23269 unsigned int bytes_read
;
23271 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
23272 mac_ptr
+= bytes_read
;
23273 mac_ptr
+= offset_size
;
23277 case DW_MACRO_import
:
23278 case DW_MACRO_import_sup
:
23279 /* Note that, according to the spec, a transparent include
23280 chain cannot call DW_MACRO_start_file. So, we can just
23281 skip this opcode. */
23282 mac_ptr
+= offset_size
;
23285 case DW_MACINFO_vendor_ext
:
23286 /* Only skip the data by MAC_PTR. */
23287 if (!section_is_gnu
)
23289 unsigned int bytes_read
;
23291 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
23292 mac_ptr
+= bytes_read
;
23293 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
23294 mac_ptr
+= bytes_read
;
23299 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
23300 mac_ptr
, mac_end
, abfd
, offset_size
,
23302 if (mac_ptr
== NULL
)
23306 } while (macinfo_type
!= 0 && current_file
== NULL
);
23308 /* Second pass: Process all entries.
23310 Use the AT_COMMAND_LINE flag to determine whether we are still processing
23311 command-line macro definitions/undefinitions. This flag is unset when we
23312 reach the first DW_MACINFO_start_file entry. */
23314 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
23316 NULL
, xcalloc
, xfree
));
23317 mac_ptr
= section
->buffer
+ offset
;
23318 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
23319 *slot
= (void *) mac_ptr
;
23320 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
23321 current_file
, lh
, section
,
23322 section_is_gnu
, 0, offset_size
,
23323 include_hash
.get ());
23326 /* Check if the attribute's form is a DW_FORM_block*
23327 if so return true else false. */
23330 attr_form_is_block (const struct attribute
*attr
)
23332 return (attr
== NULL
? 0 :
23333 attr
->form
== DW_FORM_block1
23334 || attr
->form
== DW_FORM_block2
23335 || attr
->form
== DW_FORM_block4
23336 || attr
->form
== DW_FORM_block
23337 || attr
->form
== DW_FORM_exprloc
);
23340 /* Return non-zero if ATTR's value is a section offset --- classes
23341 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
23342 You may use DW_UNSND (attr) to retrieve such offsets.
23344 Section 7.5.4, "Attribute Encodings", explains that no attribute
23345 may have a value that belongs to more than one of these classes; it
23346 would be ambiguous if we did, because we use the same forms for all
23350 attr_form_is_section_offset (const struct attribute
*attr
)
23352 return (attr
->form
== DW_FORM_data4
23353 || attr
->form
== DW_FORM_data8
23354 || attr
->form
== DW_FORM_sec_offset
);
23357 /* Return non-zero if ATTR's value falls in the 'constant' class, or
23358 zero otherwise. When this function returns true, you can apply
23359 dwarf2_get_attr_constant_value to it.
23361 However, note that for some attributes you must check
23362 attr_form_is_section_offset before using this test. DW_FORM_data4
23363 and DW_FORM_data8 are members of both the constant class, and of
23364 the classes that contain offsets into other debug sections
23365 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
23366 that, if an attribute's can be either a constant or one of the
23367 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
23368 taken as section offsets, not constants.
23370 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
23371 cannot handle that. */
23374 attr_form_is_constant (const struct attribute
*attr
)
23376 switch (attr
->form
)
23378 case DW_FORM_sdata
:
23379 case DW_FORM_udata
:
23380 case DW_FORM_data1
:
23381 case DW_FORM_data2
:
23382 case DW_FORM_data4
:
23383 case DW_FORM_data8
:
23384 case DW_FORM_implicit_const
:
23392 /* DW_ADDR is always stored already as sect_offset; despite for the forms
23393 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
23396 attr_form_is_ref (const struct attribute
*attr
)
23398 switch (attr
->form
)
23400 case DW_FORM_ref_addr
:
23405 case DW_FORM_ref_udata
:
23406 case DW_FORM_GNU_ref_alt
:
23413 /* Return the .debug_loc section to use for CU.
23414 For DWO files use .debug_loc.dwo. */
23416 static struct dwarf2_section_info
*
23417 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23421 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23423 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23425 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
23426 : &dwarf2_per_objfile
->loc
);
23429 /* A helper function that fills in a dwarf2_loclist_baton. */
23432 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23433 struct dwarf2_loclist_baton
*baton
,
23434 const struct attribute
*attr
)
23436 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23438 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
23440 baton
->per_cu
= cu
->per_cu
;
23441 gdb_assert (baton
->per_cu
);
23442 /* We don't know how long the location list is, but make sure we
23443 don't run off the edge of the section. */
23444 baton
->size
= section
->size
- DW_UNSND (attr
);
23445 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23446 baton
->base_address
= cu
->base_address
;
23447 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23451 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
23452 struct dwarf2_cu
*cu
, int is_block
)
23454 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23455 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23457 if (attr_form_is_section_offset (attr
)
23458 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
23459 the section. If so, fall through to the complaint in the
23461 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
23463 struct dwarf2_loclist_baton
*baton
;
23465 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
23467 fill_in_loclist_baton (cu
, baton
, attr
);
23469 if (cu
->base_known
== 0)
23470 complaint (&symfile_complaints
,
23471 _("Location list used without "
23472 "specifying the CU base address."));
23474 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23475 ? dwarf2_loclist_block_index
23476 : dwarf2_loclist_index
);
23477 SYMBOL_LOCATION_BATON (sym
) = baton
;
23481 struct dwarf2_locexpr_baton
*baton
;
23483 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
23484 baton
->per_cu
= cu
->per_cu
;
23485 gdb_assert (baton
->per_cu
);
23487 if (attr_form_is_block (attr
))
23489 /* Note that we're just copying the block's data pointer
23490 here, not the actual data. We're still pointing into the
23491 info_buffer for SYM's objfile; right now we never release
23492 that buffer, but when we do clean up properly this may
23494 baton
->size
= DW_BLOCK (attr
)->size
;
23495 baton
->data
= DW_BLOCK (attr
)->data
;
23499 dwarf2_invalid_attrib_class_complaint ("location description",
23500 SYMBOL_NATURAL_NAME (sym
));
23504 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23505 ? dwarf2_locexpr_block_index
23506 : dwarf2_locexpr_index
);
23507 SYMBOL_LOCATION_BATON (sym
) = baton
;
23511 /* Return the OBJFILE associated with the compilation unit CU. If CU
23512 came from a separate debuginfo file, then the master objfile is
23516 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
23518 struct objfile
*objfile
= per_cu
->objfile
;
23520 /* Return the master objfile, so that we can report and look up the
23521 correct file containing this variable. */
23522 if (objfile
->separate_debug_objfile_backlink
)
23523 objfile
= objfile
->separate_debug_objfile_backlink
;
23528 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
23529 (CU_HEADERP is unused in such case) or prepare a temporary copy at
23530 CU_HEADERP first. */
23532 static const struct comp_unit_head
*
23533 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
23534 struct dwarf2_per_cu_data
*per_cu
)
23536 const gdb_byte
*info_ptr
;
23539 return &per_cu
->cu
->header
;
23541 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
23543 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
23544 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
23545 rcuh_kind::COMPILE
);
23550 /* Return the address size given in the compilation unit header for CU. */
23553 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
23555 struct comp_unit_head cu_header_local
;
23556 const struct comp_unit_head
*cu_headerp
;
23558 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
23560 return cu_headerp
->addr_size
;
23563 /* Return the offset size given in the compilation unit header for CU. */
23566 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
23568 struct comp_unit_head cu_header_local
;
23569 const struct comp_unit_head
*cu_headerp
;
23571 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
23573 return cu_headerp
->offset_size
;
23576 /* See its dwarf2loc.h declaration. */
23579 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
23581 struct comp_unit_head cu_header_local
;
23582 const struct comp_unit_head
*cu_headerp
;
23584 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
23586 if (cu_headerp
->version
== 2)
23587 return cu_headerp
->addr_size
;
23589 return cu_headerp
->offset_size
;
23592 /* Return the text offset of the CU. The returned offset comes from
23593 this CU's objfile. If this objfile came from a separate debuginfo
23594 file, then the offset may be different from the corresponding
23595 offset in the parent objfile. */
23598 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
23600 struct objfile
*objfile
= per_cu
->objfile
;
23602 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23605 /* Return DWARF version number of PER_CU. */
23608 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
23610 return per_cu
->dwarf_version
;
23613 /* Locate the .debug_info compilation unit from CU's objfile which contains
23614 the DIE at OFFSET. Raises an error on failure. */
23616 static struct dwarf2_per_cu_data
*
23617 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23618 unsigned int offset_in_dwz
,
23619 struct objfile
*objfile
)
23621 struct dwarf2_per_cu_data
*this_cu
;
23623 const sect_offset
*cu_off
;
23626 high
= dwarf2_per_objfile
->n_comp_units
- 1;
23629 struct dwarf2_per_cu_data
*mid_cu
;
23630 int mid
= low
+ (high
- low
) / 2;
23632 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
23633 cu_off
= &mid_cu
->sect_off
;
23634 if (mid_cu
->is_dwz
> offset_in_dwz
23635 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
23640 gdb_assert (low
== high
);
23641 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
23642 cu_off
= &this_cu
->sect_off
;
23643 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
23645 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23646 error (_("Dwarf Error: could not find partial DIE containing "
23647 "offset 0x%x [in module %s]"),
23648 to_underlying (sect_off
), bfd_get_filename (objfile
->obfd
));
23650 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
23652 return dwarf2_per_objfile
->all_comp_units
[low
-1];
23656 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
23657 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
23658 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23659 error (_("invalid dwarf2 offset %u"), to_underlying (sect_off
));
23660 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23665 /* Initialize dwarf2_cu CU, owned by PER_CU. */
23668 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
23670 memset (cu
, 0, sizeof (*cu
));
23672 cu
->per_cu
= per_cu
;
23673 cu
->objfile
= per_cu
->objfile
;
23674 obstack_init (&cu
->comp_unit_obstack
);
23677 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23680 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23681 enum language pretend_language
)
23683 struct attribute
*attr
;
23685 /* Set the language we're debugging. */
23686 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23688 set_cu_language (DW_UNSND (attr
), cu
);
23691 cu
->language
= pretend_language
;
23692 cu
->language_defn
= language_def (cu
->language
);
23695 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23698 /* Release one cached compilation unit, CU. We unlink it from the tree
23699 of compilation units, but we don't remove it from the read_in_chain;
23700 the caller is responsible for that.
23701 NOTE: DATA is a void * because this function is also used as a
23702 cleanup routine. */
23705 free_heap_comp_unit (void *data
)
23707 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
23709 gdb_assert (cu
->per_cu
!= NULL
);
23710 cu
->per_cu
->cu
= NULL
;
23713 obstack_free (&cu
->comp_unit_obstack
, NULL
);
23718 /* This cleanup function is passed the address of a dwarf2_cu on the stack
23719 when we're finished with it. We can't free the pointer itself, but be
23720 sure to unlink it from the cache. Also release any associated storage. */
23723 free_stack_comp_unit (void *data
)
23725 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
23727 gdb_assert (cu
->per_cu
!= NULL
);
23728 cu
->per_cu
->cu
= NULL
;
23731 obstack_free (&cu
->comp_unit_obstack
, NULL
);
23732 cu
->partial_dies
= NULL
;
23735 /* Free all cached compilation units. */
23738 free_cached_comp_units (void *data
)
23740 dwarf2_per_objfile
->free_cached_comp_units ();
23743 /* Increase the age counter on each cached compilation unit, and free
23744 any that are too old. */
23747 age_cached_comp_units (void)
23749 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23751 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
23752 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23753 while (per_cu
!= NULL
)
23755 per_cu
->cu
->last_used
++;
23756 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23757 dwarf2_mark (per_cu
->cu
);
23758 per_cu
= per_cu
->cu
->read_in_chain
;
23761 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23762 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23763 while (per_cu
!= NULL
)
23765 struct dwarf2_per_cu_data
*next_cu
;
23767 next_cu
= per_cu
->cu
->read_in_chain
;
23769 if (!per_cu
->cu
->mark
)
23771 free_heap_comp_unit (per_cu
->cu
);
23772 *last_chain
= next_cu
;
23775 last_chain
= &per_cu
->cu
->read_in_chain
;
23781 /* Remove a single compilation unit from the cache. */
23784 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
23786 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23788 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23789 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23790 while (per_cu
!= NULL
)
23792 struct dwarf2_per_cu_data
*next_cu
;
23794 next_cu
= per_cu
->cu
->read_in_chain
;
23796 if (per_cu
== target_per_cu
)
23798 free_heap_comp_unit (per_cu
->cu
);
23800 *last_chain
= next_cu
;
23804 last_chain
= &per_cu
->cu
->read_in_chain
;
23810 /* Release all extra memory associated with OBJFILE. */
23813 dwarf2_free_objfile (struct objfile
*objfile
)
23816 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23817 dwarf2_objfile_data_key
);
23819 if (dwarf2_per_objfile
== NULL
)
23822 dwarf2_per_objfile
->~dwarf2_per_objfile ();
23825 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23826 We store these in a hash table separate from the DIEs, and preserve them
23827 when the DIEs are flushed out of cache.
23829 The CU "per_cu" pointer is needed because offset alone is not enough to
23830 uniquely identify the type. A file may have multiple .debug_types sections,
23831 or the type may come from a DWO file. Furthermore, while it's more logical
23832 to use per_cu->section+offset, with Fission the section with the data is in
23833 the DWO file but we don't know that section at the point we need it.
23834 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23835 because we can enter the lookup routine, get_die_type_at_offset, from
23836 outside this file, and thus won't necessarily have PER_CU->cu.
23837 Fortunately, PER_CU is stable for the life of the objfile. */
23839 struct dwarf2_per_cu_offset_and_type
23841 const struct dwarf2_per_cu_data
*per_cu
;
23842 sect_offset sect_off
;
23846 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23849 per_cu_offset_and_type_hash (const void *item
)
23851 const struct dwarf2_per_cu_offset_and_type
*ofs
23852 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23854 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23857 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23860 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23862 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23863 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23864 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23865 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23867 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23868 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23871 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23872 table if necessary. For convenience, return TYPE.
23874 The DIEs reading must have careful ordering to:
23875 * Not cause infite loops trying to read in DIEs as a prerequisite for
23876 reading current DIE.
23877 * Not trying to dereference contents of still incompletely read in types
23878 while reading in other DIEs.
23879 * Enable referencing still incompletely read in types just by a pointer to
23880 the type without accessing its fields.
23882 Therefore caller should follow these rules:
23883 * Try to fetch any prerequisite types we may need to build this DIE type
23884 before building the type and calling set_die_type.
23885 * After building type call set_die_type for current DIE as soon as
23886 possible before fetching more types to complete the current type.
23887 * Make the type as complete as possible before fetching more types. */
23889 static struct type
*
23890 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23892 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23893 struct objfile
*objfile
= cu
->objfile
;
23894 struct attribute
*attr
;
23895 struct dynamic_prop prop
;
23897 /* For Ada types, make sure that the gnat-specific data is always
23898 initialized (if not already set). There are a few types where
23899 we should not be doing so, because the type-specific area is
23900 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23901 where the type-specific area is used to store the floatformat).
23902 But this is not a problem, because the gnat-specific information
23903 is actually not needed for these types. */
23904 if (need_gnat_info (cu
)
23905 && TYPE_CODE (type
) != TYPE_CODE_FUNC
23906 && TYPE_CODE (type
) != TYPE_CODE_FLT
23907 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
23908 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
23909 && TYPE_CODE (type
) != TYPE_CODE_METHOD
23910 && !HAVE_GNAT_AUX_INFO (type
))
23911 INIT_GNAT_SPECIFIC (type
);
23913 /* Read DW_AT_allocated and set in type. */
23914 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23915 if (attr_form_is_block (attr
))
23917 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23918 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
23920 else if (attr
!= NULL
)
23922 complaint (&symfile_complaints
,
23923 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
23924 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23925 to_underlying (die
->sect_off
));
23928 /* Read DW_AT_associated and set in type. */
23929 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23930 if (attr_form_is_block (attr
))
23932 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23933 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
23935 else if (attr
!= NULL
)
23937 complaint (&symfile_complaints
,
23938 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
23939 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23940 to_underlying (die
->sect_off
));
23943 /* Read DW_AT_data_location and set in type. */
23944 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23945 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23946 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
23948 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23950 dwarf2_per_objfile
->die_type_hash
=
23951 htab_create_alloc_ex (127,
23952 per_cu_offset_and_type_hash
,
23953 per_cu_offset_and_type_eq
,
23955 &objfile
->objfile_obstack
,
23956 hashtab_obstack_allocate
,
23957 dummy_obstack_deallocate
);
23960 ofs
.per_cu
= cu
->per_cu
;
23961 ofs
.sect_off
= die
->sect_off
;
23963 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23964 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
23966 complaint (&symfile_complaints
,
23967 _("A problem internal to GDB: DIE 0x%x has type already set"),
23968 to_underlying (die
->sect_off
));
23969 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23970 struct dwarf2_per_cu_offset_and_type
);
23975 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23976 or return NULL if the die does not have a saved type. */
23978 static struct type
*
23979 get_die_type_at_offset (sect_offset sect_off
,
23980 struct dwarf2_per_cu_data
*per_cu
)
23982 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23984 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23987 ofs
.per_cu
= per_cu
;
23988 ofs
.sect_off
= sect_off
;
23989 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23990 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
23997 /* Look up the type for DIE in CU in die_type_hash,
23998 or return NULL if DIE does not have a saved type. */
24000 static struct type
*
24001 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
24003 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
24006 /* Add a dependence relationship from CU to REF_PER_CU. */
24009 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
24010 struct dwarf2_per_cu_data
*ref_per_cu
)
24014 if (cu
->dependencies
== NULL
)
24016 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
24017 NULL
, &cu
->comp_unit_obstack
,
24018 hashtab_obstack_allocate
,
24019 dummy_obstack_deallocate
);
24021 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
24023 *slot
= ref_per_cu
;
24026 /* Subroutine of dwarf2_mark to pass to htab_traverse.
24027 Set the mark field in every compilation unit in the
24028 cache that we must keep because we are keeping CU. */
24031 dwarf2_mark_helper (void **slot
, void *data
)
24033 struct dwarf2_per_cu_data
*per_cu
;
24035 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
24037 /* cu->dependencies references may not yet have been ever read if QUIT aborts
24038 reading of the chain. As such dependencies remain valid it is not much
24039 useful to track and undo them during QUIT cleanups. */
24040 if (per_cu
->cu
== NULL
)
24043 if (per_cu
->cu
->mark
)
24045 per_cu
->cu
->mark
= 1;
24047 if (per_cu
->cu
->dependencies
!= NULL
)
24048 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
24053 /* Set the mark field in CU and in every other compilation unit in the
24054 cache that we must keep because we are keeping CU. */
24057 dwarf2_mark (struct dwarf2_cu
*cu
)
24062 if (cu
->dependencies
!= NULL
)
24063 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
24067 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
24071 per_cu
->cu
->mark
= 0;
24072 per_cu
= per_cu
->cu
->read_in_chain
;
24076 /* Trivial hash function for partial_die_info: the hash value of a DIE
24077 is its offset in .debug_info for this objfile. */
24080 partial_die_hash (const void *item
)
24082 const struct partial_die_info
*part_die
24083 = (const struct partial_die_info
*) item
;
24085 return to_underlying (part_die
->sect_off
);
24088 /* Trivial comparison function for partial_die_info structures: two DIEs
24089 are equal if they have the same offset. */
24092 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
24094 const struct partial_die_info
*part_die_lhs
24095 = (const struct partial_die_info
*) item_lhs
;
24096 const struct partial_die_info
*part_die_rhs
24097 = (const struct partial_die_info
*) item_rhs
;
24099 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
24102 static struct cmd_list_element
*set_dwarf_cmdlist
;
24103 static struct cmd_list_element
*show_dwarf_cmdlist
;
24106 set_dwarf_cmd (const char *args
, int from_tty
)
24108 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
24113 show_dwarf_cmd (const char *args
, int from_tty
)
24115 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
24118 /* Free data associated with OBJFILE, if necessary. */
24121 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
24123 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
24126 /* Make sure we don't accidentally use dwarf2_per_objfile while
24128 dwarf2_per_objfile
= NULL
;
24130 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
24131 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
24133 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
24134 VEC_free (dwarf2_per_cu_ptr
,
24135 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
24136 xfree (data
->all_type_units
);
24138 VEC_free (dwarf2_section_info_def
, data
->types
);
24140 if (data
->dwo_files
)
24141 free_dwo_files (data
->dwo_files
, objfile
);
24142 if (data
->dwp_file
)
24143 gdb_bfd_unref (data
->dwp_file
->dbfd
);
24145 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
24146 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
24148 if (data
->index_table
!= NULL
)
24149 data
->index_table
->~mapped_index ();
24153 /* The "save gdb-index" command. */
24155 /* In-memory buffer to prepare data to be written later to a file. */
24159 /* Copy DATA to the end of the buffer. */
24160 template<typename T
>
24161 void append_data (const T
&data
)
24163 std::copy (reinterpret_cast<const gdb_byte
*> (&data
),
24164 reinterpret_cast<const gdb_byte
*> (&data
+ 1),
24165 grow (sizeof (data
)));
24168 /* Copy CSTR (a zero-terminated string) to the end of buffer. The
24169 terminating zero is appended too. */
24170 void append_cstr0 (const char *cstr
)
24172 const size_t size
= strlen (cstr
) + 1;
24173 std::copy (cstr
, cstr
+ size
, grow (size
));
24176 /* Accept a host-format integer in VAL and append it to the buffer
24177 as a target-format integer which is LEN bytes long. */
24178 void append_uint (size_t len
, bfd_endian byte_order
, ULONGEST val
)
24180 ::store_unsigned_integer (grow (len
), len
, byte_order
, val
);
24183 /* Return the size of the buffer. */
24184 size_t size () const
24186 return m_vec
.size ();
24189 /* Write the buffer to FILE. */
24190 void file_write (FILE *file
) const
24192 if (::fwrite (m_vec
.data (), 1, m_vec
.size (), file
) != m_vec
.size ())
24193 error (_("couldn't write data to file"));
24197 /* Grow SIZE bytes at the end of the buffer. Returns a pointer to
24198 the start of the new block. */
24199 gdb_byte
*grow (size_t size
)
24201 m_vec
.resize (m_vec
.size () + size
);
24202 return &*m_vec
.end () - size
;
24205 gdb::byte_vector m_vec
;
24208 /* An entry in the symbol table. */
24209 struct symtab_index_entry
24211 /* The name of the symbol. */
24213 /* The offset of the name in the constant pool. */
24214 offset_type index_offset
;
24215 /* A sorted vector of the indices of all the CUs that hold an object
24217 std::vector
<offset_type
> cu_indices
;
24220 /* The symbol table. This is a power-of-2-sized hash table. */
24221 struct mapped_symtab
24225 data
.resize (1024);
24228 offset_type n_elements
= 0;
24229 std::vector
<symtab_index_entry
> data
;
24232 /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to
24235 Function is used only during write_hash_table so no index format backward
24236 compatibility is needed. */
24238 static symtab_index_entry
&
24239 find_slot (struct mapped_symtab
*symtab
, const char *name
)
24241 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
24243 index
= hash
& (symtab
->data
.size () - 1);
24244 step
= ((hash
* 17) & (symtab
->data
.size () - 1)) | 1;
24248 if (symtab
->data
[index
].name
== NULL
24249 || strcmp (name
, symtab
->data
[index
].name
) == 0)
24250 return symtab
->data
[index
];
24251 index
= (index
+ step
) & (symtab
->data
.size () - 1);
24255 /* Expand SYMTAB's hash table. */
24258 hash_expand (struct mapped_symtab
*symtab
)
24260 auto old_entries
= std::move (symtab
->data
);
24262 symtab
->data
.clear ();
24263 symtab
->data
.resize (old_entries
.size () * 2);
24265 for (auto &it
: old_entries
)
24266 if (it
.name
!= NULL
)
24268 auto &ref
= find_slot (symtab
, it
.name
);
24269 ref
= std::move (it
);
24273 /* Add an entry to SYMTAB. NAME is the name of the symbol.
24274 CU_INDEX is the index of the CU in which the symbol appears.
24275 IS_STATIC is one if the symbol is static, otherwise zero (global). */
24278 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
24279 int is_static
, gdb_index_symbol_kind kind
,
24280 offset_type cu_index
)
24282 offset_type cu_index_and_attrs
;
24284 ++symtab
->n_elements
;
24285 if (4 * symtab
->n_elements
/ 3 >= symtab
->data
.size ())
24286 hash_expand (symtab
);
24288 symtab_index_entry
&slot
= find_slot (symtab
, name
);
24289 if (slot
.name
== NULL
)
24292 /* index_offset is set later. */
24295 cu_index_and_attrs
= 0;
24296 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
24297 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
24298 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
24300 /* We don't want to record an index value twice as we want to avoid the
24302 We process all global symbols and then all static symbols
24303 (which would allow us to avoid the duplication by only having to check
24304 the last entry pushed), but a symbol could have multiple kinds in one CU.
24305 To keep things simple we don't worry about the duplication here and
24306 sort and uniqufy the list after we've processed all symbols. */
24307 slot
.cu_indices
.push_back (cu_index_and_attrs
);
24310 /* Sort and remove duplicates of all symbols' cu_indices lists. */
24313 uniquify_cu_indices (struct mapped_symtab
*symtab
)
24315 for (auto &entry
: symtab
->data
)
24317 if (entry
.name
!= NULL
&& !entry
.cu_indices
.empty ())
24319 auto &cu_indices
= entry
.cu_indices
;
24320 std::sort (cu_indices
.begin (), cu_indices
.end ());
24321 auto from
= std::unique (cu_indices
.begin (), cu_indices
.end ());
24322 cu_indices
.erase (from
, cu_indices
.end ());
24327 /* A form of 'const char *' suitable for container keys. Only the
24328 pointer is stored. The strings themselves are compared, not the
24333 c_str_view (const char *cstr
)
24337 bool operator== (const c_str_view
&other
) const
24339 return strcmp (m_cstr
, other
.m_cstr
) == 0;
24343 friend class c_str_view_hasher
;
24344 const char *const m_cstr
;
24347 /* A std::unordered_map::hasher for c_str_view that uses the right
24348 hash function for strings in a mapped index. */
24349 class c_str_view_hasher
24352 size_t operator () (const c_str_view
&x
) const
24354 return mapped_index_string_hash (INT_MAX
, x
.m_cstr
);
24358 /* A std::unordered_map::hasher for std::vector<>. */
24359 template<typename T
>
24360 class vector_hasher
24363 size_t operator () (const std::vector
<T
> &key
) const
24365 return iterative_hash (key
.data (),
24366 sizeof (key
.front ()) * key
.size (), 0);
24370 /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with
24371 constant pool entries going into the data buffer CPOOL. */
24374 write_hash_table (mapped_symtab
*symtab
, data_buf
&output
, data_buf
&cpool
)
24377 /* Elements are sorted vectors of the indices of all the CUs that
24378 hold an object of this name. */
24379 std::unordered_map
<std::vector
<offset_type
>, offset_type
,
24380 vector_hasher
<offset_type
>>
24383 /* We add all the index vectors to the constant pool first, to
24384 ensure alignment is ok. */
24385 for (symtab_index_entry
&entry
: symtab
->data
)
24387 if (entry
.name
== NULL
)
24389 gdb_assert (entry
.index_offset
== 0);
24391 /* Finding before inserting is faster than always trying to
24392 insert, because inserting always allocates a node, does the
24393 lookup, and then destroys the new node if another node
24394 already had the same key. C++17 try_emplace will avoid
24397 = symbol_hash_table
.find (entry
.cu_indices
);
24398 if (found
!= symbol_hash_table
.end ())
24400 entry
.index_offset
= found
->second
;
24404 symbol_hash_table
.emplace (entry
.cu_indices
, cpool
.size ());
24405 entry
.index_offset
= cpool
.size ();
24406 cpool
.append_data (MAYBE_SWAP (entry
.cu_indices
.size ()));
24407 for (const auto index
: entry
.cu_indices
)
24408 cpool
.append_data (MAYBE_SWAP (index
));
24412 /* Now write out the hash table. */
24413 std::unordered_map
<c_str_view
, offset_type
, c_str_view_hasher
> str_table
;
24414 for (const auto &entry
: symtab
->data
)
24416 offset_type str_off
, vec_off
;
24418 if (entry
.name
!= NULL
)
24420 const auto insertpair
= str_table
.emplace (entry
.name
, cpool
.size ());
24421 if (insertpair
.second
)
24422 cpool
.append_cstr0 (entry
.name
);
24423 str_off
= insertpair
.first
->second
;
24424 vec_off
= entry
.index_offset
;
24428 /* While 0 is a valid constant pool index, it is not valid
24429 to have 0 for both offsets. */
24434 output
.append_data (MAYBE_SWAP (str_off
));
24435 output
.append_data (MAYBE_SWAP (vec_off
));
24439 typedef std::unordered_map
<partial_symtab
*, unsigned int> psym_index_map
;
24441 /* Helper struct for building the address table. */
24442 struct addrmap_index_data
24444 addrmap_index_data (data_buf
&addr_vec_
, psym_index_map
&cu_index_htab_
)
24445 : addr_vec (addr_vec_
), cu_index_htab (cu_index_htab_
)
24448 struct objfile
*objfile
;
24449 data_buf
&addr_vec
;
24450 psym_index_map
&cu_index_htab
;
24452 /* Non-zero if the previous_* fields are valid.
24453 We can't write an entry until we see the next entry (since it is only then
24454 that we know the end of the entry). */
24455 int previous_valid
;
24456 /* Index of the CU in the table of all CUs in the index file. */
24457 unsigned int previous_cu_index
;
24458 /* Start address of the CU. */
24459 CORE_ADDR previous_cu_start
;
24462 /* Write an address entry to ADDR_VEC. */
24465 add_address_entry (struct objfile
*objfile
, data_buf
&addr_vec
,
24466 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
24468 CORE_ADDR baseaddr
;
24470 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
24472 addr_vec
.append_uint (8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
24473 addr_vec
.append_uint (8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
24474 addr_vec
.append_data (MAYBE_SWAP (cu_index
));
24477 /* Worker function for traversing an addrmap to build the address table. */
24480 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
24482 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
24483 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
24485 if (data
->previous_valid
)
24486 add_address_entry (data
->objfile
, data
->addr_vec
,
24487 data
->previous_cu_start
, start_addr
,
24488 data
->previous_cu_index
);
24490 data
->previous_cu_start
= start_addr
;
24493 const auto it
= data
->cu_index_htab
.find (pst
);
24494 gdb_assert (it
!= data
->cu_index_htab
.cend ());
24495 data
->previous_cu_index
= it
->second
;
24496 data
->previous_valid
= 1;
24499 data
->previous_valid
= 0;
24504 /* Write OBJFILE's address map to ADDR_VEC.
24505 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
24506 in the index file. */
24509 write_address_map (struct objfile
*objfile
, data_buf
&addr_vec
,
24510 psym_index_map
&cu_index_htab
)
24512 struct addrmap_index_data
addrmap_index_data (addr_vec
, cu_index_htab
);
24514 /* When writing the address table, we have to cope with the fact that
24515 the addrmap iterator only provides the start of a region; we have to
24516 wait until the next invocation to get the start of the next region. */
24518 addrmap_index_data
.objfile
= objfile
;
24519 addrmap_index_data
.previous_valid
= 0;
24521 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
24522 &addrmap_index_data
);
24524 /* It's highly unlikely the last entry (end address = 0xff...ff)
24525 is valid, but we should still handle it.
24526 The end address is recorded as the start of the next region, but that
24527 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
24529 if (addrmap_index_data
.previous_valid
)
24530 add_address_entry (objfile
, addr_vec
,
24531 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
24532 addrmap_index_data
.previous_cu_index
);
24535 /* Return the symbol kind of PSYM. */
24537 static gdb_index_symbol_kind
24538 symbol_kind (struct partial_symbol
*psym
)
24540 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
24541 enum address_class aclass
= PSYMBOL_CLASS (psym
);
24549 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
24551 return GDB_INDEX_SYMBOL_KIND_TYPE
;
24553 case LOC_CONST_BYTES
:
24554 case LOC_OPTIMIZED_OUT
:
24556 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
24558 /* Note: It's currently impossible to recognize psyms as enum values
24559 short of reading the type info. For now punt. */
24560 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
24562 /* There are other LOC_FOO values that one might want to classify
24563 as variables, but dwarf2read.c doesn't currently use them. */
24564 return GDB_INDEX_SYMBOL_KIND_OTHER
;
24566 case STRUCT_DOMAIN
:
24567 return GDB_INDEX_SYMBOL_KIND_TYPE
;
24569 return GDB_INDEX_SYMBOL_KIND_OTHER
;
24573 /* Add a list of partial symbols to SYMTAB. */
24576 write_psymbols (struct mapped_symtab
*symtab
,
24577 std::unordered_set
<partial_symbol
*> &psyms_seen
,
24578 struct partial_symbol
**psymp
,
24580 offset_type cu_index
,
24583 for (; count
-- > 0; ++psymp
)
24585 struct partial_symbol
*psym
= *psymp
;
24587 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
24588 error (_("Ada is not currently supported by the index"));
24590 /* Only add a given psymbol once. */
24591 if (psyms_seen
.insert (psym
).second
)
24593 gdb_index_symbol_kind kind
= symbol_kind (psym
);
24595 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
24596 is_static
, kind
, cu_index
);
24601 /* A helper struct used when iterating over debug_types. */
24602 struct signatured_type_index_data
24604 signatured_type_index_data (data_buf
&types_list_
,
24605 std::unordered_set
<partial_symbol
*> &psyms_seen_
)
24606 : types_list (types_list_
), psyms_seen (psyms_seen_
)
24609 struct objfile
*objfile
;
24610 struct mapped_symtab
*symtab
;
24611 data_buf
&types_list
;
24612 std::unordered_set
<partial_symbol
*> &psyms_seen
;
24616 /* A helper function that writes a single signatured_type to an
24620 write_one_signatured_type (void **slot
, void *d
)
24622 struct signatured_type_index_data
*info
24623 = (struct signatured_type_index_data
*) d
;
24624 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
24625 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
24627 write_psymbols (info
->symtab
,
24629 &info
->objfile
->global_psymbols
[psymtab
->globals_offset
],
24630 psymtab
->n_global_syms
, info
->cu_index
,
24632 write_psymbols (info
->symtab
,
24634 &info
->objfile
->static_psymbols
[psymtab
->statics_offset
],
24635 psymtab
->n_static_syms
, info
->cu_index
,
24638 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
24639 to_underlying (entry
->per_cu
.sect_off
));
24640 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
24641 to_underlying (entry
->type_offset_in_tu
));
24642 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
, entry
->signature
);
24649 /* Recurse into all "included" dependencies and count their symbols as
24650 if they appeared in this psymtab. */
24653 recursively_count_psymbols (struct partial_symtab
*psymtab
,
24654 size_t &psyms_seen
)
24656 for (int i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
24657 if (psymtab
->dependencies
[i
]->user
!= NULL
)
24658 recursively_count_psymbols (psymtab
->dependencies
[i
],
24661 psyms_seen
+= psymtab
->n_global_syms
;
24662 psyms_seen
+= psymtab
->n_static_syms
;
24665 /* Recurse into all "included" dependencies and write their symbols as
24666 if they appeared in this psymtab. */
24669 recursively_write_psymbols (struct objfile
*objfile
,
24670 struct partial_symtab
*psymtab
,
24671 struct mapped_symtab
*symtab
,
24672 std::unordered_set
<partial_symbol
*> &psyms_seen
,
24673 offset_type cu_index
)
24677 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
24678 if (psymtab
->dependencies
[i
]->user
!= NULL
)
24679 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
24680 symtab
, psyms_seen
, cu_index
);
24682 write_psymbols (symtab
,
24684 &objfile
->global_psymbols
[psymtab
->globals_offset
],
24685 psymtab
->n_global_syms
, cu_index
,
24687 write_psymbols (symtab
,
24689 &objfile
->static_psymbols
[psymtab
->statics_offset
],
24690 psymtab
->n_static_syms
, cu_index
,
24694 /* Create an index file for OBJFILE in the directory DIR. */
24697 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
24699 if (dwarf2_per_objfile
->using_index
)
24700 error (_("Cannot use an index to create the index"));
24702 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
24703 error (_("Cannot make an index when the file has multiple .debug_types sections"));
24705 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
24709 if (stat (objfile_name (objfile
), &st
) < 0)
24710 perror_with_name (objfile_name (objfile
));
24712 std::string
filename (std::string (dir
) + SLASH_STRING
24713 + lbasename (objfile_name (objfile
)) + INDEX_SUFFIX
);
24715 FILE *out_file
= gdb_fopen_cloexec (filename
.c_str (), "wb").release ();
24717 error (_("Can't open `%s' for writing"), filename
.c_str ());
24719 /* Order matters here; we want FILE to be closed before FILENAME is
24720 unlinked, because on MS-Windows one cannot delete a file that is
24721 still open. (Don't call anything here that might throw until
24722 file_closer is created.) */
24723 gdb::unlinker
unlink_file (filename
.c_str ());
24724 gdb_file_up
close_out_file (out_file
);
24726 mapped_symtab symtab
;
24729 /* While we're scanning CU's create a table that maps a psymtab pointer
24730 (which is what addrmap records) to its index (which is what is recorded
24731 in the index file). This will later be needed to write the address
24733 psym_index_map cu_index_htab
;
24734 cu_index_htab
.reserve (dwarf2_per_objfile
->n_comp_units
);
24736 /* The CU list is already sorted, so we don't need to do additional
24737 work here. Also, the debug_types entries do not appear in
24738 all_comp_units, but only in their own hash table. */
24740 /* The psyms_seen set is potentially going to be largish (~40k
24741 elements when indexing a -g3 build of GDB itself). Estimate the
24742 number of elements in order to avoid too many rehashes, which
24743 require rebuilding buckets and thus many trips to
24745 size_t psyms_count
= 0;
24746 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
24748 struct dwarf2_per_cu_data
*per_cu
24749 = dwarf2_per_objfile
->all_comp_units
[i
];
24750 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
24752 if (psymtab
!= NULL
&& psymtab
->user
== NULL
)
24753 recursively_count_psymbols (psymtab
, psyms_count
);
24755 /* Generating an index for gdb itself shows a ratio of
24756 TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */
24757 std::unordered_set
<partial_symbol
*> psyms_seen (psyms_count
/ 4);
24758 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
24760 struct dwarf2_per_cu_data
*per_cu
24761 = dwarf2_per_objfile
->all_comp_units
[i
];
24762 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
24764 /* CU of a shared file from 'dwz -m' may be unused by this main file.
24765 It may be referenced from a local scope but in such case it does not
24766 need to be present in .gdb_index. */
24767 if (psymtab
== NULL
)
24770 if (psymtab
->user
== NULL
)
24771 recursively_write_psymbols (objfile
, psymtab
, &symtab
,
24774 const auto insertpair
= cu_index_htab
.emplace (psymtab
, i
);
24775 gdb_assert (insertpair
.second
);
24777 cu_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
24778 to_underlying (per_cu
->sect_off
));
24779 cu_list
.append_uint (8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
24782 /* Dump the address map. */
24784 write_address_map (objfile
, addr_vec
, cu_index_htab
);
24786 /* Write out the .debug_type entries, if any. */
24787 data_buf types_cu_list
;
24788 if (dwarf2_per_objfile
->signatured_types
)
24790 signatured_type_index_data
sig_data (types_cu_list
,
24793 sig_data
.objfile
= objfile
;
24794 sig_data
.symtab
= &symtab
;
24795 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
24796 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
24797 write_one_signatured_type
, &sig_data
);
24800 /* Now that we've processed all symbols we can shrink their cu_indices
24802 uniquify_cu_indices (&symtab
);
24804 data_buf symtab_vec
, constant_pool
;
24805 write_hash_table (&symtab
, symtab_vec
, constant_pool
);
24808 const offset_type size_of_contents
= 6 * sizeof (offset_type
);
24809 offset_type total_len
= size_of_contents
;
24811 /* The version number. */
24812 contents
.append_data (MAYBE_SWAP (8));
24814 /* The offset of the CU list from the start of the file. */
24815 contents
.append_data (MAYBE_SWAP (total_len
));
24816 total_len
+= cu_list
.size ();
24818 /* The offset of the types CU list from the start of the file. */
24819 contents
.append_data (MAYBE_SWAP (total_len
));
24820 total_len
+= types_cu_list
.size ();
24822 /* The offset of the address table from the start of the file. */
24823 contents
.append_data (MAYBE_SWAP (total_len
));
24824 total_len
+= addr_vec
.size ();
24826 /* The offset of the symbol table from the start of the file. */
24827 contents
.append_data (MAYBE_SWAP (total_len
));
24828 total_len
+= symtab_vec
.size ();
24830 /* The offset of the constant pool from the start of the file. */
24831 contents
.append_data (MAYBE_SWAP (total_len
));
24832 total_len
+= constant_pool
.size ();
24834 gdb_assert (contents
.size () == size_of_contents
);
24836 contents
.file_write (out_file
);
24837 cu_list
.file_write (out_file
);
24838 types_cu_list
.file_write (out_file
);
24839 addr_vec
.file_write (out_file
);
24840 symtab_vec
.file_write (out_file
);
24841 constant_pool
.file_write (out_file
);
24843 /* We want to keep the file. */
24844 unlink_file
.keep ();
24847 /* Implementation of the `save gdb-index' command.
24849 Note that the file format used by this command is documented in the
24850 GDB manual. Any changes here must be documented there. */
24853 save_gdb_index_command (const char *arg
, int from_tty
)
24855 struct objfile
*objfile
;
24858 error (_("usage: save gdb-index DIRECTORY"));
24860 ALL_OBJFILES (objfile
)
24864 /* If the objfile does not correspond to an actual file, skip it. */
24865 if (stat (objfile_name (objfile
), &st
) < 0)
24869 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
24870 dwarf2_objfile_data_key
);
24871 if (dwarf2_per_objfile
)
24876 write_psymtabs_to_index (objfile
, arg
);
24878 CATCH (except
, RETURN_MASK_ERROR
)
24880 exception_fprintf (gdb_stderr
, except
,
24881 _("Error while writing index for `%s': "),
24882 objfile_name (objfile
));
24891 int dwarf_always_disassemble
;
24894 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
24895 struct cmd_list_element
*c
, const char *value
)
24897 fprintf_filtered (file
,
24898 _("Whether to always disassemble "
24899 "DWARF expressions is %s.\n"),
24904 show_check_physname (struct ui_file
*file
, int from_tty
,
24905 struct cmd_list_element
*c
, const char *value
)
24907 fprintf_filtered (file
,
24908 _("Whether to check \"physname\" is %s.\n"),
24913 _initialize_dwarf2_read (void)
24915 struct cmd_list_element
*c
;
24917 dwarf2_objfile_data_key
24918 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
24920 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
24921 Set DWARF specific variables.\n\
24922 Configure DWARF variables such as the cache size"),
24923 &set_dwarf_cmdlist
, "maintenance set dwarf ",
24924 0/*allow-unknown*/, &maintenance_set_cmdlist
);
24926 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
24927 Show DWARF specific variables\n\
24928 Show DWARF variables such as the cache size"),
24929 &show_dwarf_cmdlist
, "maintenance show dwarf ",
24930 0/*allow-unknown*/, &maintenance_show_cmdlist
);
24932 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
24933 &dwarf_max_cache_age
, _("\
24934 Set the upper bound on the age of cached DWARF compilation units."), _("\
24935 Show the upper bound on the age of cached DWARF compilation units."), _("\
24936 A higher limit means that cached compilation units will be stored\n\
24937 in memory longer, and more total memory will be used. Zero disables\n\
24938 caching, which can slow down startup."),
24940 show_dwarf_max_cache_age
,
24941 &set_dwarf_cmdlist
,
24942 &show_dwarf_cmdlist
);
24944 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
24945 &dwarf_always_disassemble
, _("\
24946 Set whether `info address' always disassembles DWARF expressions."), _("\
24947 Show whether `info address' always disassembles DWARF expressions."), _("\
24948 When enabled, DWARF expressions are always printed in an assembly-like\n\
24949 syntax. When disabled, expressions will be printed in a more\n\
24950 conversational style, when possible."),
24952 show_dwarf_always_disassemble
,
24953 &set_dwarf_cmdlist
,
24954 &show_dwarf_cmdlist
);
24956 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
24957 Set debugging of the DWARF reader."), _("\
24958 Show debugging of the DWARF reader."), _("\
24959 When enabled (non-zero), debugging messages are printed during DWARF\n\
24960 reading and symtab expansion. A value of 1 (one) provides basic\n\
24961 information. A value greater than 1 provides more verbose information."),
24964 &setdebuglist
, &showdebuglist
);
24966 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
24967 Set debugging of the DWARF DIE reader."), _("\
24968 Show debugging of the DWARF DIE reader."), _("\
24969 When enabled (non-zero), DIEs are dumped after they are read in.\n\
24970 The value is the maximum depth to print."),
24973 &setdebuglist
, &showdebuglist
);
24975 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
24976 Set debugging of the dwarf line reader."), _("\
24977 Show debugging of the dwarf line reader."), _("\
24978 When enabled (non-zero), line number entries are dumped as they are read in.\n\
24979 A value of 1 (one) provides basic information.\n\
24980 A value greater than 1 provides more verbose information."),
24983 &setdebuglist
, &showdebuglist
);
24985 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
24986 Set cross-checking of \"physname\" code against demangler."), _("\
24987 Show cross-checking of \"physname\" code against demangler."), _("\
24988 When enabled, GDB's internal \"physname\" code is checked against\n\
24990 NULL
, show_check_physname
,
24991 &setdebuglist
, &showdebuglist
);
24993 add_setshow_boolean_cmd ("use-deprecated-index-sections",
24994 no_class
, &use_deprecated_index_sections
, _("\
24995 Set whether to use deprecated gdb_index sections."), _("\
24996 Show whether to use deprecated gdb_index sections."), _("\
24997 When enabled, deprecated .gdb_index sections are used anyway.\n\
24998 Normally they are ignored either because of a missing feature or\n\
24999 performance issue.\n\
25000 Warning: This option must be enabled before gdb reads the file."),
25003 &setlist
, &showlist
);
25005 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
25007 Save a gdb-index file.\n\
25008 Usage: save gdb-index DIRECTORY"),
25010 set_cmd_completer (c
, filename_completer
);
25012 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25013 &dwarf2_locexpr_funcs
);
25014 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25015 &dwarf2_loclist_funcs
);
25017 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25018 &dwarf2_block_frame_base_locexpr_funcs
);
25019 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25020 &dwarf2_block_frame_base_loclist_funcs
);
25023 selftests::register_test ("dw2_expand_symtabs_matching",
25024 selftests::dw2_expand_symtabs_matching::run_test
);