1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2012 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. */
39 #include "gdb-demangle.h"
40 #include "expression.h"
41 #include "filenames.h" /* for DOSish file names */
44 #include "complaints.h"
46 #include "dwarf2expr.h"
47 #include "dwarf2loc.h"
48 #include "cp-support.h"
54 #include "typeprint.h"
57 #include "exceptions.h"
59 #include "completer.h"
64 #include "gdbcore.h" /* for gnutarget */
65 #include "gdb/gdb-index.h"
69 #include "gdb_string.h"
70 #include "gdb_assert.h"
71 #include <sys/types.h>
78 #define MAP_FAILED ((void *) -1)
82 typedef struct symbol
*symbolp
;
85 /* When non-zero, print basic high level tracing messages.
86 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
87 static int dwarf2_read_debug
= 0;
89 /* When non-zero, dump DIEs after they are read in. */
90 static int dwarf2_die_debug
= 0;
92 /* When non-zero, cross-check physname against demangler. */
93 static int check_physname
= 0;
95 /* When non-zero, do not reject deprecated .gdb_index sections. */
96 int use_deprecated_index_sections
= 0;
100 /* When set, the file that we're processing is known to have debugging
101 info for C++ namespaces. GCC 3.3.x did not produce this information,
102 but later versions do. */
104 static int processing_has_namespace_info
;
106 static const struct objfile_data
*dwarf2_objfile_data_key
;
108 struct dwarf2_section_info
113 /* Not NULL if the section was actually mmapped. */
115 /* Page aligned size of mmapped area. */
116 bfd_size_type map_len
;
117 /* True if we have tried to read this section. */
121 typedef struct dwarf2_section_info dwarf2_section_info_def
;
122 DEF_VEC_O (dwarf2_section_info_def
);
124 /* All offsets in the index are of this type. It must be
125 architecture-independent. */
126 typedef uint32_t offset_type
;
128 DEF_VEC_I (offset_type
);
130 /* Ensure only legit values are used. */
131 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
133 gdb_assert ((unsigned int) (value) <= 1); \
134 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
137 /* Ensure only legit values are used. */
138 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
140 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
141 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
142 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
145 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
146 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
148 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
149 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
152 /* A description of the mapped index. The file format is described in
153 a comment by the code that writes the index. */
156 /* Index data format version. */
159 /* The total length of the buffer. */
162 /* A pointer to the address table data. */
163 const gdb_byte
*address_table
;
165 /* Size of the address table data in bytes. */
166 offset_type address_table_size
;
168 /* The symbol table, implemented as a hash table. */
169 const offset_type
*symbol_table
;
171 /* Size in slots, each slot is 2 offset_types. */
172 offset_type symbol_table_slots
;
174 /* A pointer to the constant pool. */
175 const char *constant_pool
;
178 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
179 DEF_VEC_P (dwarf2_per_cu_ptr
);
181 /* Collection of data recorded per objfile.
182 This hangs off of dwarf2_objfile_data_key. */
184 struct dwarf2_per_objfile
186 struct dwarf2_section_info info
;
187 struct dwarf2_section_info abbrev
;
188 struct dwarf2_section_info line
;
189 struct dwarf2_section_info loc
;
190 struct dwarf2_section_info macinfo
;
191 struct dwarf2_section_info macro
;
192 struct dwarf2_section_info str
;
193 struct dwarf2_section_info ranges
;
194 struct dwarf2_section_info addr
;
195 struct dwarf2_section_info frame
;
196 struct dwarf2_section_info eh_frame
;
197 struct dwarf2_section_info gdb_index
;
199 VEC (dwarf2_section_info_def
) *types
;
202 struct objfile
*objfile
;
204 /* Table of all the compilation units. This is used to locate
205 the target compilation unit of a particular reference. */
206 struct dwarf2_per_cu_data
**all_comp_units
;
208 /* The number of compilation units in ALL_COMP_UNITS. */
211 /* The number of .debug_types-related CUs. */
214 /* The .debug_types-related CUs (TUs). */
215 struct signatured_type
**all_type_units
;
217 /* The number of entries in all_type_unit_groups. */
218 int n_type_unit_groups
;
220 /* Table of type unit groups.
221 This exists to make it easy to iterate over all CUs and TU groups. */
222 struct type_unit_group
**all_type_unit_groups
;
224 /* Table of struct type_unit_group objects.
225 The hash key is the DW_AT_stmt_list value. */
226 htab_t type_unit_groups
;
228 /* A table mapping .debug_types signatures to its signatured_type entry.
229 This is NULL if the .debug_types section hasn't been read in yet. */
230 htab_t signatured_types
;
232 /* Type unit statistics, to see how well the scaling improvements
236 int nr_uniq_abbrev_tables
;
238 int nr_symtab_sharers
;
239 int nr_stmt_less_type_units
;
242 /* A chain of compilation units that are currently read in, so that
243 they can be freed later. */
244 struct dwarf2_per_cu_data
*read_in_chain
;
246 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
247 This is NULL if the table hasn't been allocated yet. */
250 /* A flag indicating wether this objfile has a section loaded at a
252 int has_section_at_zero
;
254 /* True if we are using the mapped index,
255 or we are faking it for OBJF_READNOW's sake. */
256 unsigned char using_index
;
258 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
259 struct mapped_index
*index_table
;
261 /* When using index_table, this keeps track of all quick_file_names entries.
262 TUs can share line table entries with CUs or other TUs, and there can be
263 a lot more TUs than unique line tables, so we maintain a separate table
264 of all line table entries to support the sharing. */
265 htab_t quick_file_names_table
;
267 /* Set during partial symbol reading, to prevent queueing of full
269 int reading_partial_symbols
;
271 /* Table mapping type DIEs to their struct type *.
272 This is NULL if not allocated yet.
273 The mapping is done via (CU/TU signature + DIE offset) -> type. */
274 htab_t die_type_hash
;
276 /* The CUs we recently read. */
277 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
280 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
282 /* Default names of the debugging sections. */
284 /* Note that if the debugging section has been compressed, it might
285 have a name like .zdebug_info. */
287 static const struct dwarf2_debug_sections dwarf2_elf_names
=
289 { ".debug_info", ".zdebug_info" },
290 { ".debug_abbrev", ".zdebug_abbrev" },
291 { ".debug_line", ".zdebug_line" },
292 { ".debug_loc", ".zdebug_loc" },
293 { ".debug_macinfo", ".zdebug_macinfo" },
294 { ".debug_macro", ".zdebug_macro" },
295 { ".debug_str", ".zdebug_str" },
296 { ".debug_ranges", ".zdebug_ranges" },
297 { ".debug_types", ".zdebug_types" },
298 { ".debug_addr", ".zdebug_addr" },
299 { ".debug_frame", ".zdebug_frame" },
300 { ".eh_frame", NULL
},
301 { ".gdb_index", ".zgdb_index" },
305 /* List of DWO sections. */
307 static const struct dwo_section_names
309 struct dwarf2_section_names abbrev_dwo
;
310 struct dwarf2_section_names info_dwo
;
311 struct dwarf2_section_names line_dwo
;
312 struct dwarf2_section_names loc_dwo
;
313 struct dwarf2_section_names macinfo_dwo
;
314 struct dwarf2_section_names macro_dwo
;
315 struct dwarf2_section_names str_dwo
;
316 struct dwarf2_section_names str_offsets_dwo
;
317 struct dwarf2_section_names types_dwo
;
321 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
322 { ".debug_info.dwo", ".zdebug_info.dwo" },
323 { ".debug_line.dwo", ".zdebug_line.dwo" },
324 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
325 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
326 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
327 { ".debug_str.dwo", ".zdebug_str.dwo" },
328 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
329 { ".debug_types.dwo", ".zdebug_types.dwo" },
332 /* local data types */
334 /* The data in a compilation unit header, after target2host
335 translation, looks like this. */
336 struct comp_unit_head
340 unsigned char addr_size
;
341 unsigned char signed_addr_p
;
342 sect_offset abbrev_offset
;
344 /* Size of file offsets; either 4 or 8. */
345 unsigned int offset_size
;
347 /* Size of the length field; either 4 or 12. */
348 unsigned int initial_length_size
;
350 /* Offset to the first byte of this compilation unit header in the
351 .debug_info section, for resolving relative reference dies. */
354 /* Offset to first die in this cu from the start of the cu.
355 This will be the first byte following the compilation unit header. */
356 cu_offset first_die_offset
;
359 /* Type used for delaying computation of method physnames.
360 See comments for compute_delayed_physnames. */
361 struct delayed_method_info
363 /* The type to which the method is attached, i.e., its parent class. */
366 /* The index of the method in the type's function fieldlists. */
369 /* The index of the method in the fieldlist. */
372 /* The name of the DIE. */
375 /* The DIE associated with this method. */
376 struct die_info
*die
;
379 typedef struct delayed_method_info delayed_method_info
;
380 DEF_VEC_O (delayed_method_info
);
382 /* Internal state when decoding a particular compilation unit. */
385 /* The objfile containing this compilation unit. */
386 struct objfile
*objfile
;
388 /* The header of the compilation unit. */
389 struct comp_unit_head header
;
391 /* Base address of this compilation unit. */
392 CORE_ADDR base_address
;
394 /* Non-zero if base_address has been set. */
397 /* The language we are debugging. */
398 enum language language
;
399 const struct language_defn
*language_defn
;
401 const char *producer
;
403 /* The generic symbol table building routines have separate lists for
404 file scope symbols and all all other scopes (local scopes). So
405 we need to select the right one to pass to add_symbol_to_list().
406 We do it by keeping a pointer to the correct list in list_in_scope.
408 FIXME: The original dwarf code just treated the file scope as the
409 first local scope, and all other local scopes as nested local
410 scopes, and worked fine. Check to see if we really need to
411 distinguish these in buildsym.c. */
412 struct pending
**list_in_scope
;
414 /* The abbrev table for this CU.
415 Normally this points to the abbrev table in the objfile.
416 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
417 struct abbrev_table
*abbrev_table
;
419 /* Hash table holding all the loaded partial DIEs
420 with partial_die->offset.SECT_OFF as hash. */
423 /* Storage for things with the same lifetime as this read-in compilation
424 unit, including partial DIEs. */
425 struct obstack comp_unit_obstack
;
427 /* When multiple dwarf2_cu structures are living in memory, this field
428 chains them all together, so that they can be released efficiently.
429 We will probably also want a generation counter so that most-recently-used
430 compilation units are cached... */
431 struct dwarf2_per_cu_data
*read_in_chain
;
433 /* Backchain to our per_cu entry if the tree has been built. */
434 struct dwarf2_per_cu_data
*per_cu
;
436 /* How many compilation units ago was this CU last referenced? */
439 /* A hash table of DIE cu_offset for following references with
440 die_info->offset.sect_off as hash. */
443 /* Full DIEs if read in. */
444 struct die_info
*dies
;
446 /* A set of pointers to dwarf2_per_cu_data objects for compilation
447 units referenced by this one. Only set during full symbol processing;
448 partial symbol tables do not have dependencies. */
451 /* Header data from the line table, during full symbol processing. */
452 struct line_header
*line_header
;
454 /* A list of methods which need to have physnames computed
455 after all type information has been read. */
456 VEC (delayed_method_info
) *method_list
;
458 /* To be copied to symtab->call_site_htab. */
459 htab_t call_site_htab
;
461 /* Non-NULL if this CU came from a DWO file.
462 There is an invariant here that is important to remember:
463 Except for attributes copied from the top level DIE in the "main"
464 (or "stub") file in preparation for reading the DWO file
465 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
466 Either there isn't a DWO file (in which case this is NULL and the point
467 is moot), or there is and either we're not going to read it (in which
468 case this is NULL) or there is and we are reading it (in which case this
470 struct dwo_unit
*dwo_unit
;
472 /* The DW_AT_addr_base attribute if present, zero otherwise
473 (zero is a valid value though).
474 Note this value comes from the stub CU/TU's DIE. */
477 /* The DW_AT_ranges_base attribute if present, zero otherwise
478 (zero is a valid value though).
479 Note this value comes from the stub CU/TU's DIE.
480 Also note that the value is zero in the non-DWO case so this value can
481 be used without needing to know whether DWO files are in use or not. */
482 ULONGEST ranges_base
;
484 /* Mark used when releasing cached dies. */
485 unsigned int mark
: 1;
487 /* This CU references .debug_loc. See the symtab->locations_valid field.
488 This test is imperfect as there may exist optimized debug code not using
489 any location list and still facing inlining issues if handled as
490 unoptimized code. For a future better test see GCC PR other/32998. */
491 unsigned int has_loclist
: 1;
493 /* These cache the results for producer_is_gxx_lt_4_6 and producer_is_icc.
494 CHECKED_PRODUCER is set if both PRODUCER_IS_GXX_LT_4_6 and PRODUCER_IS_ICC
495 are valid. This information is cached because profiling CU expansion
496 showed excessive time spent in producer_is_gxx_lt_4_6. */
497 unsigned int checked_producer
: 1;
498 unsigned int producer_is_gxx_lt_4_6
: 1;
499 unsigned int producer_is_icc
: 1;
502 /* Persistent data held for a compilation unit, even when not
503 processing it. We put a pointer to this structure in the
504 read_symtab_private field of the psymtab. */
506 struct dwarf2_per_cu_data
508 /* The start offset and length of this compilation unit. 2**29-1
509 bytes should suffice to store the length of any compilation unit
510 - if it doesn't, GDB will fall over anyway.
511 NOTE: Unlike comp_unit_head.length, this length includes
513 If the DIE refers to a DWO file, this is always of the original die,
516 unsigned int length
: 29;
518 /* Flag indicating this compilation unit will be read in before
519 any of the current compilation units are processed. */
520 unsigned int queued
: 1;
522 /* This flag will be set when reading partial DIEs if we need to load
523 absolutely all DIEs for this compilation unit, instead of just the ones
524 we think are interesting. It gets set if we look for a DIE in the
525 hash table and don't find it. */
526 unsigned int load_all_dies
: 1;
528 /* Non-zero if this CU is from .debug_types. */
529 unsigned int is_debug_types
: 1;
531 /* The section this CU/TU lives in.
532 If the DIE refers to a DWO file, this is always the original die,
534 struct dwarf2_section_info
*info_or_types_section
;
536 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
537 of the CU cache it gets reset to NULL again. */
538 struct dwarf2_cu
*cu
;
540 /* The corresponding objfile.
541 Normally we can get the objfile from dwarf2_per_objfile.
542 However we can enter this file with just a "per_cu" handle. */
543 struct objfile
*objfile
;
545 /* When using partial symbol tables, the 'psymtab' field is active.
546 Otherwise the 'quick' field is active. */
549 /* The partial symbol table associated with this compilation unit,
550 or NULL for unread partial units. */
551 struct partial_symtab
*psymtab
;
553 /* Data needed by the "quick" functions. */
554 struct dwarf2_per_cu_quick_data
*quick
;
559 /* The CUs we import using DW_TAG_imported_unit. This is filled in
560 while reading psymtabs, used to compute the psymtab dependencies,
561 and then cleared. Then it is filled in again while reading full
562 symbols, and only deleted when the objfile is destroyed. */
563 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
565 /* Type units are grouped by their DW_AT_stmt_list entry so that they
566 can share them. If this is a TU, this points to the containing
568 struct type_unit_group
*type_unit_group
;
572 /* Entry in the signatured_types hash table. */
574 struct signatured_type
576 /* The "per_cu" object of this type.
577 N.B.: This is the first member so that it's easy to convert pointers
579 struct dwarf2_per_cu_data per_cu
;
581 /* The type's signature. */
584 /* Offset in the TU of the type's DIE, as read from the TU header.
585 If the definition lives in a DWO file, this value is unusable. */
586 cu_offset type_offset_in_tu
;
588 /* Offset in the section of the type's DIE.
589 If the definition lives in a DWO file, this is the offset in the
590 .debug_types.dwo section.
591 The value is zero until the actual value is known.
592 Zero is otherwise not a valid section offset. */
593 sect_offset type_offset_in_section
;
596 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
597 an object of this type. */
599 struct type_unit_group
601 /* dwarf2read.c's main "handle" on the symtab.
602 To simplify things we create an artificial CU that "includes" all the
603 type units using this stmt_list so that the rest of the code still has
604 a "per_cu" handle on the symtab.
605 This PER_CU is recognized by having no section. */
606 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->info_or_types_section == NULL)
607 struct dwarf2_per_cu_data
*per_cu
;
609 /* The TUs that share this DW_AT_stmt_list entry.
610 This is added to while parsing type units to build partial symtabs,
611 and is deleted afterwards and not used again. */
612 VEC (dwarf2_per_cu_ptr
) *tus
;
614 /* The primary symtab.
615 Type units don't have DW_AT_name so we create an essentially
616 anonymous symtab as the primary symtab. */
617 struct symtab
*primary_symtab
;
619 /* Offset in .debug_line. This is the hash key. */
620 sect_offset line_offset
;
622 /* The number of symtabs from the line header.
623 The value here must match line_header.num_file_names. */
624 unsigned int num_symtabs
;
626 /* The symbol tables for this TU (obtained from the files listed in
628 WARNING: The order of entries here must match the order of entries
629 in the line header. After the first TU using this type_unit_group, the
630 line header for the subsequent TUs is recreated from this. This is done
631 because we need to use the same symtabs for each TU using the same
632 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
633 there's no guarantee the line header doesn't have duplicate entries. */
634 struct symtab
**symtabs
;
637 /* These sections are what may appear in a "dwo" file. */
641 struct dwarf2_section_info abbrev
;
642 struct dwarf2_section_info info
;
643 struct dwarf2_section_info line
;
644 struct dwarf2_section_info loc
;
645 struct dwarf2_section_info macinfo
;
646 struct dwarf2_section_info macro
;
647 struct dwarf2_section_info str
;
648 struct dwarf2_section_info str_offsets
;
649 VEC (dwarf2_section_info_def
) *types
;
652 /* Common bits of DWO CUs/TUs. */
656 /* Backlink to the containing struct dwo_file. */
657 struct dwo_file
*dwo_file
;
659 /* The "id" that distinguishes this CU/TU.
660 .debug_info calls this "dwo_id", .debug_types calls this "signature".
661 Since signatures came first, we stick with it for consistency. */
664 /* The section this CU/TU lives in, in the DWO file. */
665 struct dwarf2_section_info
*info_or_types_section
;
667 /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
671 /* For types, offset in the type's DIE of the type defined by this TU. */
672 cu_offset type_offset_in_tu
;
675 /* Data for one DWO file. */
679 /* The DW_AT_GNU_dwo_name attribute.
680 We don't manage space for this, it's an attribute. */
681 const char *dwo_name
;
683 /* The bfd, when the file is open. Otherwise this is NULL. */
686 /* Section info for this file. */
687 struct dwo_sections sections
;
689 /* Table of CUs in the file.
690 Each element is a struct dwo_unit. */
693 /* Table of TUs in the file.
694 Each element is a struct dwo_unit. */
698 /* Struct used to pass misc. parameters to read_die_and_children, et
699 al. which are used for both .debug_info and .debug_types dies.
700 All parameters here are unchanging for the life of the call. This
701 struct exists to abstract away the constant parameters of die reading. */
703 struct die_reader_specs
705 /* die_section->asection->owner. */
708 /* The CU of the DIE we are parsing. */
709 struct dwarf2_cu
*cu
;
711 /* Non-NULL if reading a DWO file. */
712 struct dwo_file
*dwo_file
;
714 /* The section the die comes from.
715 This is either .debug_info or .debug_types, or the .dwo variants. */
716 struct dwarf2_section_info
*die_section
;
718 /* die_section->buffer. */
721 /* The end of the buffer. */
722 const gdb_byte
*buffer_end
;
725 /* Type of function passed to init_cutu_and_read_dies, et.al. */
726 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
728 struct die_info
*comp_unit_die
,
732 /* The line number information for a compilation unit (found in the
733 .debug_line section) begins with a "statement program header",
734 which contains the following information. */
737 unsigned int total_length
;
738 unsigned short version
;
739 unsigned int header_length
;
740 unsigned char minimum_instruction_length
;
741 unsigned char maximum_ops_per_instruction
;
742 unsigned char default_is_stmt
;
744 unsigned char line_range
;
745 unsigned char opcode_base
;
747 /* standard_opcode_lengths[i] is the number of operands for the
748 standard opcode whose value is i. This means that
749 standard_opcode_lengths[0] is unused, and the last meaningful
750 element is standard_opcode_lengths[opcode_base - 1]. */
751 unsigned char *standard_opcode_lengths
;
753 /* The include_directories table. NOTE! These strings are not
754 allocated with xmalloc; instead, they are pointers into
755 debug_line_buffer. If you try to free them, `free' will get
757 unsigned int num_include_dirs
, include_dirs_size
;
760 /* The file_names table. NOTE! These strings are not allocated
761 with xmalloc; instead, they are pointers into debug_line_buffer.
762 Don't try to free them directly. */
763 unsigned int num_file_names
, file_names_size
;
767 unsigned int dir_index
;
768 unsigned int mod_time
;
770 int included_p
; /* Non-zero if referenced by the Line Number Program. */
771 struct symtab
*symtab
; /* The associated symbol table, if any. */
774 /* The start and end of the statement program following this
775 header. These point into dwarf2_per_objfile->line_buffer. */
776 gdb_byte
*statement_program_start
, *statement_program_end
;
779 /* When we construct a partial symbol table entry we only
780 need this much information. */
781 struct partial_die_info
783 /* Offset of this DIE. */
786 /* DWARF-2 tag for this DIE. */
787 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
789 /* Assorted flags describing the data found in this DIE. */
790 unsigned int has_children
: 1;
791 unsigned int is_external
: 1;
792 unsigned int is_declaration
: 1;
793 unsigned int has_type
: 1;
794 unsigned int has_specification
: 1;
795 unsigned int has_pc_info
: 1;
796 unsigned int may_be_inlined
: 1;
798 /* Flag set if the SCOPE field of this structure has been
800 unsigned int scope_set
: 1;
802 /* Flag set if the DIE has a byte_size attribute. */
803 unsigned int has_byte_size
: 1;
805 /* Flag set if any of the DIE's children are template arguments. */
806 unsigned int has_template_arguments
: 1;
808 /* Flag set if fixup_partial_die has been called on this die. */
809 unsigned int fixup_called
: 1;
811 /* The name of this DIE. Normally the value of DW_AT_name, but
812 sometimes a default name for unnamed DIEs. */
815 /* The linkage name, if present. */
816 const char *linkage_name
;
818 /* The scope to prepend to our children. This is generally
819 allocated on the comp_unit_obstack, so will disappear
820 when this compilation unit leaves the cache. */
823 /* Some data associated with the partial DIE. The tag determines
824 which field is live. */
827 /* The location description associated with this DIE, if any. */
828 struct dwarf_block
*locdesc
;
829 /* The offset of an import, for DW_TAG_imported_unit. */
833 /* If HAS_PC_INFO, the PC range associated with this DIE. */
837 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
838 DW_AT_sibling, if any. */
839 /* NOTE: This member isn't strictly necessary, read_partial_die could
840 return DW_AT_sibling values to its caller load_partial_dies. */
843 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
844 DW_AT_specification (or DW_AT_abstract_origin or
846 sect_offset spec_offset
;
848 /* Pointers to this DIE's parent, first child, and next sibling,
850 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
853 /* This data structure holds the information of an abbrev. */
856 unsigned int number
; /* number identifying abbrev */
857 enum dwarf_tag tag
; /* dwarf tag */
858 unsigned short has_children
; /* boolean */
859 unsigned short num_attrs
; /* number of attributes */
860 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
861 struct abbrev_info
*next
; /* next in chain */
866 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
867 ENUM_BITFIELD(dwarf_form
) form
: 16;
870 /* Size of abbrev_table.abbrev_hash_table. */
871 #define ABBREV_HASH_SIZE 121
873 /* Top level data structure to contain an abbreviation table. */
877 /* Where the abbrev table came from.
878 This is used as a sanity check when the table is used. */
881 /* Storage for the abbrev table. */
882 struct obstack abbrev_obstack
;
884 /* Hash table of abbrevs.
885 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
886 It could be statically allocated, but the previous code didn't so we
888 struct abbrev_info
**abbrevs
;
891 /* Attributes have a name and a value. */
894 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
895 ENUM_BITFIELD(dwarf_form
) form
: 15;
897 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
898 field should be in u.str (existing only for DW_STRING) but it is kept
899 here for better struct attribute alignment. */
900 unsigned int string_is_canonical
: 1;
905 struct dwarf_block
*blk
;
909 struct signatured_type
*signatured_type
;
914 /* This data structure holds a complete die structure. */
917 /* DWARF-2 tag for this DIE. */
918 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
920 /* Number of attributes */
921 unsigned char num_attrs
;
923 /* True if we're presently building the full type name for the
924 type derived from this DIE. */
925 unsigned char building_fullname
: 1;
930 /* Offset in .debug_info or .debug_types section. */
933 /* The dies in a compilation unit form an n-ary tree. PARENT
934 points to this die's parent; CHILD points to the first child of
935 this node; and all the children of a given node are chained
936 together via their SIBLING fields. */
937 struct die_info
*child
; /* Its first child, if any. */
938 struct die_info
*sibling
; /* Its next sibling, if any. */
939 struct die_info
*parent
; /* Its parent, if any. */
941 /* An array of attributes, with NUM_ATTRS elements. There may be
942 zero, but it's not common and zero-sized arrays are not
943 sufficiently portable C. */
944 struct attribute attrs
[1];
947 /* Get at parts of an attribute structure. */
949 #define DW_STRING(attr) ((attr)->u.str)
950 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
951 #define DW_UNSND(attr) ((attr)->u.unsnd)
952 #define DW_BLOCK(attr) ((attr)->u.blk)
953 #define DW_SND(attr) ((attr)->u.snd)
954 #define DW_ADDR(attr) ((attr)->u.addr)
955 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
957 /* Blocks are a bunch of untyped bytes. */
962 /* Valid only if SIZE is not zero. */
966 #ifndef ATTR_ALLOC_CHUNK
967 #define ATTR_ALLOC_CHUNK 4
970 /* Allocate fields for structs, unions and enums in this size. */
971 #ifndef DW_FIELD_ALLOC_CHUNK
972 #define DW_FIELD_ALLOC_CHUNK 4
975 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
976 but this would require a corresponding change in unpack_field_as_long
978 static int bits_per_byte
= 8;
980 /* The routines that read and process dies for a C struct or C++ class
981 pass lists of data member fields and lists of member function fields
982 in an instance of a field_info structure, as defined below. */
985 /* List of data member and baseclasses fields. */
988 struct nextfield
*next
;
993 *fields
, *baseclasses
;
995 /* Number of fields (including baseclasses). */
998 /* Number of baseclasses. */
1001 /* Set if the accesibility of one of the fields is not public. */
1002 int non_public_fields
;
1004 /* Member function fields array, entries are allocated in the order they
1005 are encountered in the object file. */
1008 struct nextfnfield
*next
;
1009 struct fn_field fnfield
;
1013 /* Member function fieldlist array, contains name of possibly overloaded
1014 member function, number of overloaded member functions and a pointer
1015 to the head of the member function field chain. */
1020 struct nextfnfield
*head
;
1024 /* Number of entries in the fnfieldlists array. */
1027 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1028 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1029 struct typedef_field_list
1031 struct typedef_field field
;
1032 struct typedef_field_list
*next
;
1034 *typedef_field_list
;
1035 unsigned typedef_field_list_count
;
1038 /* One item on the queue of compilation units to read in full symbols
1040 struct dwarf2_queue_item
1042 struct dwarf2_per_cu_data
*per_cu
;
1043 enum language pretend_language
;
1044 struct dwarf2_queue_item
*next
;
1047 /* The current queue. */
1048 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1050 /* Loaded secondary compilation units are kept in memory until they
1051 have not been referenced for the processing of this many
1052 compilation units. Set this to zero to disable caching. Cache
1053 sizes of up to at least twenty will improve startup time for
1054 typical inter-CU-reference binaries, at an obvious memory cost. */
1055 static int dwarf2_max_cache_age
= 5;
1057 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
1058 struct cmd_list_element
*c
, const char *value
)
1060 fprintf_filtered (file
, _("The upper bound on the age of cached "
1061 "dwarf2 compilation units is %s.\n"),
1066 /* Various complaints about symbol reading that don't abort the process. */
1069 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1071 complaint (&symfile_complaints
,
1072 _("statement list doesn't fit in .debug_line section"));
1076 dwarf2_debug_line_missing_file_complaint (void)
1078 complaint (&symfile_complaints
,
1079 _(".debug_line section has line data without a file"));
1083 dwarf2_debug_line_missing_end_sequence_complaint (void)
1085 complaint (&symfile_complaints
,
1086 _(".debug_line section has line "
1087 "program sequence without an end"));
1091 dwarf2_complex_location_expr_complaint (void)
1093 complaint (&symfile_complaints
, _("location expression too complex"));
1097 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1100 complaint (&symfile_complaints
,
1101 _("const value length mismatch for '%s', got %d, expected %d"),
1106 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1108 complaint (&symfile_complaints
,
1109 _("debug info runs off end of %s section"
1111 section
->asection
->name
,
1112 bfd_get_filename (section
->asection
->owner
));
1116 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1118 complaint (&symfile_complaints
,
1119 _("macro debug info contains a "
1120 "malformed macro definition:\n`%s'"),
1125 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1127 complaint (&symfile_complaints
,
1128 _("invalid attribute class or form for '%s' in '%s'"),
1132 /* local function prototypes */
1134 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1136 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
1139 static void dwarf2_find_base_address (struct die_info
*die
,
1140 struct dwarf2_cu
*cu
);
1142 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1144 static void scan_partial_symbols (struct partial_die_info
*,
1145 CORE_ADDR
*, CORE_ADDR
*,
1146 int, struct dwarf2_cu
*);
1148 static void add_partial_symbol (struct partial_die_info
*,
1149 struct dwarf2_cu
*);
1151 static void add_partial_namespace (struct partial_die_info
*pdi
,
1152 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1153 int need_pc
, struct dwarf2_cu
*cu
);
1155 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1156 CORE_ADDR
*highpc
, int need_pc
,
1157 struct dwarf2_cu
*cu
);
1159 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1160 struct dwarf2_cu
*cu
);
1162 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1163 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1164 int need_pc
, struct dwarf2_cu
*cu
);
1166 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
1168 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1170 static struct abbrev_info
*abbrev_table_lookup_abbrev
1171 (const struct abbrev_table
*, unsigned int);
1173 static struct abbrev_table
*abbrev_table_read_table
1174 (struct dwarf2_section_info
*, sect_offset
);
1176 static void abbrev_table_free (struct abbrev_table
*);
1178 static void abbrev_table_free_cleanup (void *);
1180 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1181 struct dwarf2_section_info
*);
1183 static void dwarf2_free_abbrev_table (void *);
1185 static unsigned int peek_abbrev_code (bfd
*, gdb_byte
*);
1187 static struct partial_die_info
*load_partial_dies
1188 (const struct die_reader_specs
*, gdb_byte
*, int);
1190 static gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1191 struct partial_die_info
*,
1192 struct abbrev_info
*,
1196 static struct partial_die_info
*find_partial_die (sect_offset
,
1197 struct dwarf2_cu
*);
1199 static void fixup_partial_die (struct partial_die_info
*,
1200 struct dwarf2_cu
*);
1202 static gdb_byte
*read_attribute (const struct die_reader_specs
*,
1203 struct attribute
*, struct attr_abbrev
*,
1206 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
1208 static int read_1_signed_byte (bfd
*, gdb_byte
*);
1210 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
1212 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
1214 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
1216 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
1219 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
1221 static LONGEST read_checked_initial_length_and_offset
1222 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1223 unsigned int *, unsigned int *);
1225 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1228 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
1230 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1233 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
1235 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
1237 static char *read_indirect_string (bfd
*, gdb_byte
*,
1238 const struct comp_unit_head
*,
1241 static ULONGEST
read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1243 static LONGEST
read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1245 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*, gdb_byte
*,
1248 static char *read_str_index (const struct die_reader_specs
*reader
,
1249 struct dwarf2_cu
*cu
, ULONGEST str_index
);
1251 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1253 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1254 struct dwarf2_cu
*);
1256 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1259 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1260 struct dwarf2_cu
*cu
);
1262 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1264 static struct die_info
*die_specification (struct die_info
*die
,
1265 struct dwarf2_cu
**);
1267 static void free_line_header (struct line_header
*lh
);
1269 static void add_file_name (struct line_header
*, char *, unsigned int,
1270 unsigned int, unsigned int);
1272 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1273 struct dwarf2_cu
*cu
);
1275 static void dwarf_decode_lines (struct line_header
*, const char *,
1276 struct dwarf2_cu
*, struct partial_symtab
*,
1279 static void dwarf2_start_subfile (char *, const char *, const char *);
1281 static void dwarf2_start_symtab (struct dwarf2_cu
*,
1282 char *, char *, CORE_ADDR
);
1284 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1285 struct dwarf2_cu
*);
1287 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1288 struct dwarf2_cu
*, struct symbol
*);
1290 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1291 struct dwarf2_cu
*);
1293 static void dwarf2_const_value_attr (struct attribute
*attr
,
1296 struct obstack
*obstack
,
1297 struct dwarf2_cu
*cu
, LONGEST
*value
,
1299 struct dwarf2_locexpr_baton
**baton
);
1301 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1303 static int need_gnat_info (struct dwarf2_cu
*);
1305 static struct type
*die_descriptive_type (struct die_info
*,
1306 struct dwarf2_cu
*);
1308 static void set_descriptive_type (struct type
*, struct die_info
*,
1309 struct dwarf2_cu
*);
1311 static struct type
*die_containing_type (struct die_info
*,
1312 struct dwarf2_cu
*);
1314 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1315 struct dwarf2_cu
*);
1317 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1319 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1321 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1323 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1324 const char *suffix
, int physname
,
1325 struct dwarf2_cu
*cu
);
1327 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1329 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1331 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1333 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1335 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1337 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1338 struct dwarf2_cu
*, struct partial_symtab
*);
1340 static int dwarf2_get_pc_bounds (struct die_info
*,
1341 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1342 struct partial_symtab
*);
1344 static void get_scope_pc_bounds (struct die_info
*,
1345 CORE_ADDR
*, CORE_ADDR
*,
1346 struct dwarf2_cu
*);
1348 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1349 CORE_ADDR
, struct dwarf2_cu
*);
1351 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1352 struct dwarf2_cu
*);
1354 static void dwarf2_attach_fields_to_type (struct field_info
*,
1355 struct type
*, struct dwarf2_cu
*);
1357 static void dwarf2_add_member_fn (struct field_info
*,
1358 struct die_info
*, struct type
*,
1359 struct dwarf2_cu
*);
1361 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1363 struct dwarf2_cu
*);
1365 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1367 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1369 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1371 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1373 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1375 static struct type
*read_module_type (struct die_info
*die
,
1376 struct dwarf2_cu
*cu
);
1378 static const char *namespace_name (struct die_info
*die
,
1379 int *is_anonymous
, struct dwarf2_cu
*);
1381 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1383 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1385 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1386 struct dwarf2_cu
*);
1388 static struct die_info
*read_die_and_children (const struct die_reader_specs
*,
1390 gdb_byte
**new_info_ptr
,
1391 struct die_info
*parent
);
1393 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1395 gdb_byte
**new_info_ptr
,
1396 struct die_info
*parent
);
1398 static gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1399 struct die_info
**, gdb_byte
*, int *, int);
1401 static gdb_byte
*read_full_die (const struct die_reader_specs
*,
1402 struct die_info
**, gdb_byte
*, int *);
1404 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1406 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1409 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1411 static const char *dwarf2_full_name (char *name
,
1412 struct die_info
*die
,
1413 struct dwarf2_cu
*cu
);
1415 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1416 struct dwarf2_cu
**);
1418 static const char *dwarf_tag_name (unsigned int);
1420 static const char *dwarf_attr_name (unsigned int);
1422 static const char *dwarf_form_name (unsigned int);
1424 static char *dwarf_bool_name (unsigned int);
1426 static const char *dwarf_type_encoding_name (unsigned int);
1428 static struct die_info
*sibling_die (struct die_info
*);
1430 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1432 static void dump_die_for_error (struct die_info
*);
1434 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1437 /*static*/ void dump_die (struct die_info
*, int max_level
);
1439 static void store_in_ref_table (struct die_info
*,
1440 struct dwarf2_cu
*);
1442 static int is_ref_attr (struct attribute
*);
1444 static sect_offset
dwarf2_get_ref_die_offset (struct attribute
*);
1446 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1448 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1450 struct dwarf2_cu
**);
1452 static struct die_info
*follow_die_ref (struct die_info
*,
1454 struct dwarf2_cu
**);
1456 static struct die_info
*follow_die_sig (struct die_info
*,
1458 struct dwarf2_cu
**);
1460 static struct signatured_type
*lookup_signatured_type_at_offset
1461 (struct objfile
*objfile
,
1462 struct dwarf2_section_info
*section
, sect_offset offset
);
1464 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1466 static void read_signatured_type (struct signatured_type
*);
1468 static struct type_unit_group
*get_type_unit_group
1469 (struct dwarf2_per_cu_data
*, struct attribute
*);
1471 static void build_type_unit_groups (die_reader_func_ftype
*, void *);
1473 /* memory allocation interface */
1475 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1477 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1479 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int,
1482 static int attr_form_is_block (struct attribute
*);
1484 static int attr_form_is_section_offset (struct attribute
*);
1486 static int attr_form_is_constant (struct attribute
*);
1488 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1489 struct dwarf2_loclist_baton
*baton
,
1490 struct attribute
*attr
);
1492 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1494 struct dwarf2_cu
*cu
);
1496 static gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1498 struct abbrev_info
*abbrev
);
1500 static void free_stack_comp_unit (void *);
1502 static hashval_t
partial_die_hash (const void *item
);
1504 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1506 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1507 (sect_offset offset
, struct objfile
*objfile
);
1509 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1510 struct dwarf2_per_cu_data
*per_cu
);
1512 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1513 struct die_info
*comp_unit_die
,
1514 enum language pretend_language
);
1516 static void free_heap_comp_unit (void *);
1518 static void free_cached_comp_units (void *);
1520 static void age_cached_comp_units (void);
1522 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1524 static struct type
*set_die_type (struct die_info
*, struct type
*,
1525 struct dwarf2_cu
*);
1527 static void create_all_comp_units (struct objfile
*);
1529 static int create_all_type_units (struct objfile
*);
1531 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1534 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1537 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1540 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1541 struct dwarf2_per_cu_data
*);
1543 static void dwarf2_mark (struct dwarf2_cu
*);
1545 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1547 static struct type
*get_die_type_at_offset (sect_offset
,
1548 struct dwarf2_per_cu_data
*per_cu
);
1550 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1552 static void dwarf2_release_queue (void *dummy
);
1554 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1555 enum language pretend_language
);
1557 static int maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
1558 struct dwarf2_per_cu_data
*per_cu
,
1559 enum language pretend_language
);
1561 static void process_queue (void);
1563 static void find_file_and_directory (struct die_info
*die
,
1564 struct dwarf2_cu
*cu
,
1565 char **name
, char **comp_dir
);
1567 static char *file_full_name (int file
, struct line_header
*lh
,
1568 const char *comp_dir
);
1570 static void init_cutu_and_read_dies
1571 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1572 int use_existing_cu
, int keep
,
1573 die_reader_func_ftype
*die_reader_func
, void *data
);
1575 static void init_cutu_and_read_dies_simple
1576 (struct dwarf2_per_cu_data
*this_cu
,
1577 die_reader_func_ftype
*die_reader_func
, void *data
);
1579 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1581 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1583 static struct dwo_unit
*lookup_dwo_comp_unit
1584 (struct dwarf2_per_cu_data
*, char *, const char *, ULONGEST
);
1586 static struct dwo_unit
*lookup_dwo_type_unit
1587 (struct signatured_type
*, char *, const char *);
1589 static void free_dwo_file_cleanup (void *);
1591 static void munmap_section_buffer (struct dwarf2_section_info
*);
1593 static void process_cu_includes (void);
1597 /* Convert VALUE between big- and little-endian. */
1599 byte_swap (offset_type value
)
1603 result
= (value
& 0xff) << 24;
1604 result
|= (value
& 0xff00) << 8;
1605 result
|= (value
& 0xff0000) >> 8;
1606 result
|= (value
& 0xff000000) >> 24;
1610 #define MAYBE_SWAP(V) byte_swap (V)
1613 #define MAYBE_SWAP(V) (V)
1614 #endif /* WORDS_BIGENDIAN */
1616 /* The suffix for an index file. */
1617 #define INDEX_SUFFIX ".gdb-index"
1619 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1620 struct dwarf2_cu
*cu
);
1622 /* Try to locate the sections we need for DWARF 2 debugging
1623 information and return true if we have enough to do something.
1624 NAMES points to the dwarf2 section names, or is NULL if the standard
1625 ELF names are used. */
1628 dwarf2_has_info (struct objfile
*objfile
,
1629 const struct dwarf2_debug_sections
*names
)
1631 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1632 if (!dwarf2_per_objfile
)
1634 /* Initialize per-objfile state. */
1635 struct dwarf2_per_objfile
*data
1636 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1638 memset (data
, 0, sizeof (*data
));
1639 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1640 dwarf2_per_objfile
= data
;
1642 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1644 dwarf2_per_objfile
->objfile
= objfile
;
1646 return (dwarf2_per_objfile
->info
.asection
!= NULL
1647 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1650 /* When loading sections, we look either for uncompressed section or for
1651 compressed section names. */
1654 section_is_p (const char *section_name
,
1655 const struct dwarf2_section_names
*names
)
1657 if (names
->normal
!= NULL
1658 && strcmp (section_name
, names
->normal
) == 0)
1660 if (names
->compressed
!= NULL
1661 && strcmp (section_name
, names
->compressed
) == 0)
1666 /* This function is mapped across the sections and remembers the
1667 offset and size of each of the debugging sections we are interested
1671 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
1673 const struct dwarf2_debug_sections
*names
;
1676 names
= &dwarf2_elf_names
;
1678 names
= (const struct dwarf2_debug_sections
*) vnames
;
1680 if (section_is_p (sectp
->name
, &names
->info
))
1682 dwarf2_per_objfile
->info
.asection
= sectp
;
1683 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1685 else if (section_is_p (sectp
->name
, &names
->abbrev
))
1687 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1688 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1690 else if (section_is_p (sectp
->name
, &names
->line
))
1692 dwarf2_per_objfile
->line
.asection
= sectp
;
1693 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1695 else if (section_is_p (sectp
->name
, &names
->loc
))
1697 dwarf2_per_objfile
->loc
.asection
= sectp
;
1698 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1700 else if (section_is_p (sectp
->name
, &names
->macinfo
))
1702 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1703 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1705 else if (section_is_p (sectp
->name
, &names
->macro
))
1707 dwarf2_per_objfile
->macro
.asection
= sectp
;
1708 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
1710 else if (section_is_p (sectp
->name
, &names
->str
))
1712 dwarf2_per_objfile
->str
.asection
= sectp
;
1713 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1715 else if (section_is_p (sectp
->name
, &names
->addr
))
1717 dwarf2_per_objfile
->addr
.asection
= sectp
;
1718 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
1720 else if (section_is_p (sectp
->name
, &names
->frame
))
1722 dwarf2_per_objfile
->frame
.asection
= sectp
;
1723 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1725 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
1727 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
1729 if (aflag
& SEC_HAS_CONTENTS
)
1731 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1732 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1735 else if (section_is_p (sectp
->name
, &names
->ranges
))
1737 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1738 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1740 else if (section_is_p (sectp
->name
, &names
->types
))
1742 struct dwarf2_section_info type_section
;
1744 memset (&type_section
, 0, sizeof (type_section
));
1745 type_section
.asection
= sectp
;
1746 type_section
.size
= bfd_get_section_size (sectp
);
1748 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
1751 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
1753 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1754 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1757 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1758 && bfd_section_vma (abfd
, sectp
) == 0)
1759 dwarf2_per_objfile
->has_section_at_zero
= 1;
1762 /* Decompress a section that was compressed using zlib. Store the
1763 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1766 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1767 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1769 bfd
*abfd
= sectp
->owner
;
1771 error (_("Support for zlib-compressed DWARF data (from '%s') "
1772 "is disabled in this copy of GDB"),
1773 bfd_get_filename (abfd
));
1775 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1776 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1777 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1778 bfd_size_type uncompressed_size
;
1779 gdb_byte
*uncompressed_buffer
;
1782 int header_size
= 12;
1784 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1785 || bfd_bread (compressed_buffer
,
1786 compressed_size
, abfd
) != compressed_size
)
1787 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1788 bfd_get_filename (abfd
));
1790 /* Read the zlib header. In this case, it should be "ZLIB" followed
1791 by the uncompressed section size, 8 bytes in big-endian order. */
1792 if (compressed_size
< header_size
1793 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1794 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1795 bfd_get_filename (abfd
));
1796 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1797 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1798 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1799 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1800 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1801 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1802 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1803 uncompressed_size
+= compressed_buffer
[11];
1805 /* It is possible the section consists of several compressed
1806 buffers concatenated together, so we uncompress in a loop. */
1810 strm
.avail_in
= compressed_size
- header_size
;
1811 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1812 strm
.avail_out
= uncompressed_size
;
1813 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1815 rc
= inflateInit (&strm
);
1816 while (strm
.avail_in
> 0)
1819 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1820 bfd_get_filename (abfd
), rc
);
1821 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1822 + (uncompressed_size
- strm
.avail_out
));
1823 rc
= inflate (&strm
, Z_FINISH
);
1824 if (rc
!= Z_STREAM_END
)
1825 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1826 bfd_get_filename (abfd
), rc
);
1827 rc
= inflateReset (&strm
);
1829 rc
= inflateEnd (&strm
);
1831 || strm
.avail_out
!= 0)
1832 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1833 bfd_get_filename (abfd
), rc
);
1835 do_cleanups (cleanup
);
1836 *outbuf
= uncompressed_buffer
;
1837 *outsize
= uncompressed_size
;
1841 /* A helper function that decides whether a section is empty,
1845 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1847 return info
->asection
== NULL
|| info
->size
== 0;
1850 /* Read the contents of the section INFO.
1851 OBJFILE is the main object file, but not necessarily the file where
1852 the section comes from. E.g., for DWO files INFO->asection->owner
1853 is the bfd of the DWO file.
1854 If the section is compressed, uncompress it before returning. */
1857 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1859 asection
*sectp
= info
->asection
;
1861 gdb_byte
*buf
, *retbuf
;
1862 unsigned char header
[4];
1866 info
->buffer
= NULL
;
1867 info
->map_addr
= NULL
;
1870 if (dwarf2_section_empty_p (info
))
1873 /* Note that ABFD may not be from OBJFILE, e.g. a DWO section. */
1874 abfd
= sectp
->owner
;
1876 /* Check if the file has a 4-byte header indicating compression. */
1877 if (info
->size
> sizeof (header
)
1878 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1879 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1881 /* Upon decompression, update the buffer and its size. */
1882 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1884 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1892 pagesize
= getpagesize ();
1894 /* Only try to mmap sections which are large enough: we don't want to
1895 waste space due to fragmentation. Also, only try mmap for sections
1896 without relocations. */
1898 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1900 info
->buffer
= bfd_mmap (abfd
, 0, info
->size
, PROT_READ
,
1901 MAP_PRIVATE
, sectp
->filepos
,
1902 &info
->map_addr
, &info
->map_len
);
1904 if ((caddr_t
)info
->buffer
!= MAP_FAILED
)
1906 #if HAVE_POSIX_MADVISE
1907 posix_madvise (info
->map_addr
, info
->map_len
, POSIX_MADV_WILLNEED
);
1914 /* If we get here, we are a normal, not-compressed section. */
1916 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1918 /* When debugging .o files, we may need to apply relocations; see
1919 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1920 We never compress sections in .o files, so we only need to
1921 try this when the section is not compressed. */
1922 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1925 info
->buffer
= retbuf
;
1929 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1930 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1931 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1932 bfd_get_filename (abfd
));
1935 /* A helper function that returns the size of a section in a safe way.
1936 If you are positive that the section has been read before using the
1937 size, then it is safe to refer to the dwarf2_section_info object's
1938 "size" field directly. In other cases, you must call this
1939 function, because for compressed sections the size field is not set
1940 correctly until the section has been read. */
1942 static bfd_size_type
1943 dwarf2_section_size (struct objfile
*objfile
,
1944 struct dwarf2_section_info
*info
)
1947 dwarf2_read_section (objfile
, info
);
1951 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1955 dwarf2_get_section_info (struct objfile
*objfile
,
1956 enum dwarf2_section_enum sect
,
1957 asection
**sectp
, gdb_byte
**bufp
,
1958 bfd_size_type
*sizep
)
1960 struct dwarf2_per_objfile
*data
1961 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1962 struct dwarf2_section_info
*info
;
1964 /* We may see an objfile without any DWARF, in which case we just
1975 case DWARF2_DEBUG_FRAME
:
1976 info
= &data
->frame
;
1978 case DWARF2_EH_FRAME
:
1979 info
= &data
->eh_frame
;
1982 gdb_assert_not_reached ("unexpected section");
1985 dwarf2_read_section (objfile
, info
);
1987 *sectp
= info
->asection
;
1988 *bufp
= info
->buffer
;
1989 *sizep
= info
->size
;
1993 /* DWARF quick_symbols_functions support. */
1995 /* TUs can share .debug_line entries, and there can be a lot more TUs than
1996 unique line tables, so we maintain a separate table of all .debug_line
1997 derived entries to support the sharing.
1998 All the quick functions need is the list of file names. We discard the
1999 line_header when we're done and don't need to record it here. */
2000 struct quick_file_names
2002 /* The offset in .debug_line of the line table. We hash on this. */
2003 unsigned int offset
;
2005 /* The number of entries in file_names, real_names. */
2006 unsigned int num_file_names
;
2008 /* The file names from the line table, after being run through
2010 const char **file_names
;
2012 /* The file names from the line table after being run through
2013 gdb_realpath. These are computed lazily. */
2014 const char **real_names
;
2017 /* When using the index (and thus not using psymtabs), each CU has an
2018 object of this type. This is used to hold information needed by
2019 the various "quick" methods. */
2020 struct dwarf2_per_cu_quick_data
2022 /* The file table. This can be NULL if there was no file table
2023 or it's currently not read in.
2024 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2025 struct quick_file_names
*file_names
;
2027 /* The corresponding symbol table. This is NULL if symbols for this
2028 CU have not yet been read. */
2029 struct symtab
*symtab
;
2031 /* A temporary mark bit used when iterating over all CUs in
2032 expand_symtabs_matching. */
2033 unsigned int mark
: 1;
2035 /* True if we've tried to read the file table and found there isn't one.
2036 There will be no point in trying to read it again next time. */
2037 unsigned int no_file_data
: 1;
2040 /* Hash function for a quick_file_names. */
2043 hash_file_name_entry (const void *e
)
2045 const struct quick_file_names
*file_data
= e
;
2047 return file_data
->offset
;
2050 /* Equality function for a quick_file_names. */
2053 eq_file_name_entry (const void *a
, const void *b
)
2055 const struct quick_file_names
*ea
= a
;
2056 const struct quick_file_names
*eb
= b
;
2058 return ea
->offset
== eb
->offset
;
2061 /* Delete function for a quick_file_names. */
2064 delete_file_name_entry (void *e
)
2066 struct quick_file_names
*file_data
= e
;
2069 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2071 xfree ((void*) file_data
->file_names
[i
]);
2072 if (file_data
->real_names
)
2073 xfree ((void*) file_data
->real_names
[i
]);
2076 /* The space for the struct itself lives on objfile_obstack,
2077 so we don't free it here. */
2080 /* Create a quick_file_names hash table. */
2083 create_quick_file_names_table (unsigned int nr_initial_entries
)
2085 return htab_create_alloc (nr_initial_entries
,
2086 hash_file_name_entry
, eq_file_name_entry
,
2087 delete_file_name_entry
, xcalloc
, xfree
);
2090 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2091 have to be created afterwards. You should call age_cached_comp_units after
2092 processing PER_CU->CU. dw2_setup must have been already called. */
2095 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2097 if (per_cu
->is_debug_types
)
2098 load_full_type_unit (per_cu
);
2100 load_full_comp_unit (per_cu
, language_minimal
);
2102 gdb_assert (per_cu
->cu
!= NULL
);
2104 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2107 /* Read in the symbols for PER_CU. */
2110 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2112 struct cleanup
*back_to
;
2114 /* Skip type_unit_groups, reading the type units they contain
2115 is handled elsewhere. */
2116 if (IS_TYPE_UNIT_GROUP (per_cu
))
2119 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2121 if (dwarf2_per_objfile
->using_index
2122 ? per_cu
->v
.quick
->symtab
== NULL
2123 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2125 queue_comp_unit (per_cu
, language_minimal
);
2131 /* Age the cache, releasing compilation units that have not
2132 been used recently. */
2133 age_cached_comp_units ();
2135 do_cleanups (back_to
);
2138 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2139 the objfile from which this CU came. Returns the resulting symbol
2142 static struct symtab
*
2143 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2145 gdb_assert (dwarf2_per_objfile
->using_index
);
2146 if (!per_cu
->v
.quick
->symtab
)
2148 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2149 increment_reading_symtab ();
2150 dw2_do_instantiate_symtab (per_cu
);
2151 process_cu_includes ();
2152 do_cleanups (back_to
);
2154 return per_cu
->v
.quick
->symtab
;
2157 /* Return the CU given its index.
2159 This is intended for loops like:
2161 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2162 + dwarf2_per_objfile->n_type_units); ++i)
2164 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2170 static struct dwarf2_per_cu_data
*
2171 dw2_get_cu (int index
)
2173 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2175 struct dwarf2_per_cu_data
*per_cu
;
2177 index
-= dwarf2_per_objfile
->n_comp_units
;
2178 per_cu
= &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2179 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
2183 return dwarf2_per_objfile
->all_comp_units
[index
];
2186 /* Return the primary CU given its index.
2187 The difference between this function and dw2_get_cu is in the handling
2188 of type units (TUs). Here we return the type_unit_group object.
2190 This is intended for loops like:
2192 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2193 + dwarf2_per_objfile->n_type_unit_groups); ++i)
2195 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
2201 static struct dwarf2_per_cu_data
*
2202 dw2_get_primary_cu (int index
)
2204 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2206 struct dwarf2_per_cu_data
*per_cu
;
2208 index
-= dwarf2_per_objfile
->n_comp_units
;
2209 per_cu
= dwarf2_per_objfile
->all_type_unit_groups
[index
]->per_cu
;
2210 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
2214 return dwarf2_per_objfile
->all_comp_units
[index
];
2217 /* A helper function that knows how to read a 64-bit value in a way
2218 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
2222 extract_cu_value (const char *bytes
, ULONGEST
*result
)
2224 if (sizeof (ULONGEST
) < 8)
2228 /* Ignore the upper 4 bytes if they are all zero. */
2229 for (i
= 0; i
< 4; ++i
)
2230 if (bytes
[i
+ 4] != 0)
2233 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
2236 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2240 /* Read the CU list from the mapped index, and use it to create all
2241 the CU objects for this objfile. Return 0 if something went wrong,
2242 1 if everything went ok. */
2245 create_cus_from_index (struct objfile
*objfile
, const gdb_byte
*cu_list
,
2246 offset_type cu_list_elements
)
2250 dwarf2_per_objfile
->n_comp_units
= cu_list_elements
/ 2;
2251 dwarf2_per_objfile
->all_comp_units
2252 = obstack_alloc (&objfile
->objfile_obstack
,
2253 dwarf2_per_objfile
->n_comp_units
2254 * sizeof (struct dwarf2_per_cu_data
*));
2256 for (i
= 0; i
< cu_list_elements
; i
+= 2)
2258 struct dwarf2_per_cu_data
*the_cu
;
2259 ULONGEST offset
, length
;
2261 if (!extract_cu_value (cu_list
, &offset
)
2262 || !extract_cu_value (cu_list
+ 8, &length
))
2266 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2267 struct dwarf2_per_cu_data
);
2268 the_cu
->offset
.sect_off
= offset
;
2269 the_cu
->length
= length
;
2270 the_cu
->objfile
= objfile
;
2271 the_cu
->info_or_types_section
= &dwarf2_per_objfile
->info
;
2272 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2273 struct dwarf2_per_cu_quick_data
);
2274 dwarf2_per_objfile
->all_comp_units
[i
/ 2] = the_cu
;
2280 /* Create the signatured type hash table from the index. */
2283 create_signatured_type_table_from_index (struct objfile
*objfile
,
2284 struct dwarf2_section_info
*section
,
2285 const gdb_byte
*bytes
,
2286 offset_type elements
)
2289 htab_t sig_types_hash
;
2291 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
2292 dwarf2_per_objfile
->all_type_units
2293 = obstack_alloc (&objfile
->objfile_obstack
,
2294 dwarf2_per_objfile
->n_type_units
2295 * sizeof (struct signatured_type
*));
2297 sig_types_hash
= allocate_signatured_type_table (objfile
);
2299 for (i
= 0; i
< elements
; i
+= 3)
2301 struct signatured_type
*sig_type
;
2302 ULONGEST offset
, type_offset_in_tu
, signature
;
2305 if (!extract_cu_value (bytes
, &offset
)
2306 || !extract_cu_value (bytes
+ 8, &type_offset_in_tu
))
2308 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2311 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2312 struct signatured_type
);
2313 sig_type
->signature
= signature
;
2314 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2315 sig_type
->per_cu
.is_debug_types
= 1;
2316 sig_type
->per_cu
.info_or_types_section
= section
;
2317 sig_type
->per_cu
.offset
.sect_off
= offset
;
2318 sig_type
->per_cu
.objfile
= objfile
;
2319 sig_type
->per_cu
.v
.quick
2320 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2321 struct dwarf2_per_cu_quick_data
);
2323 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2326 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2329 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2334 /* Read the address map data from the mapped index, and use it to
2335 populate the objfile's psymtabs_addrmap. */
2338 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2340 const gdb_byte
*iter
, *end
;
2341 struct obstack temp_obstack
;
2342 struct addrmap
*mutable_map
;
2343 struct cleanup
*cleanup
;
2346 obstack_init (&temp_obstack
);
2347 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2348 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2350 iter
= index
->address_table
;
2351 end
= iter
+ index
->address_table_size
;
2353 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2357 ULONGEST hi
, lo
, cu_index
;
2358 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2360 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2362 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2365 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
2366 dw2_get_cu (cu_index
));
2369 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2370 &objfile
->objfile_obstack
);
2371 do_cleanups (cleanup
);
2374 /* The hash function for strings in the mapped index. This is the same as
2375 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2376 implementation. This is necessary because the hash function is tied to the
2377 format of the mapped index file. The hash values do not have to match with
2380 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2383 mapped_index_string_hash (int index_version
, const void *p
)
2385 const unsigned char *str
= (const unsigned char *) p
;
2389 while ((c
= *str
++) != 0)
2391 if (index_version
>= 5)
2393 r
= r
* 67 + c
- 113;
2399 /* Find a slot in the mapped index INDEX for the object named NAME.
2400 If NAME is found, set *VEC_OUT to point to the CU vector in the
2401 constant pool and return 1. If NAME cannot be found, return 0. */
2404 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2405 offset_type
**vec_out
)
2407 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2409 offset_type slot
, step
;
2410 int (*cmp
) (const char *, const char *);
2412 if (current_language
->la_language
== language_cplus
2413 || current_language
->la_language
== language_java
2414 || current_language
->la_language
== language_fortran
)
2416 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2418 const char *paren
= strchr (name
, '(');
2424 dup
= xmalloc (paren
- name
+ 1);
2425 memcpy (dup
, name
, paren
- name
);
2426 dup
[paren
- name
] = 0;
2428 make_cleanup (xfree
, dup
);
2433 /* Index version 4 did not support case insensitive searches. But the
2434 indices for case insensitive languages are built in lowercase, therefore
2435 simulate our NAME being searched is also lowercased. */
2436 hash
= mapped_index_string_hash ((index
->version
== 4
2437 && case_sensitivity
== case_sensitive_off
2438 ? 5 : index
->version
),
2441 slot
= hash
& (index
->symbol_table_slots
- 1);
2442 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2443 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2447 /* Convert a slot number to an offset into the table. */
2448 offset_type i
= 2 * slot
;
2450 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2452 do_cleanups (back_to
);
2456 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2457 if (!cmp (name
, str
))
2459 *vec_out
= (offset_type
*) (index
->constant_pool
2460 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2461 do_cleanups (back_to
);
2465 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2469 /* Read the index file. If everything went ok, initialize the "quick"
2470 elements of all the CUs and return 1. Otherwise, return 0. */
2473 dwarf2_read_index (struct objfile
*objfile
)
2476 struct mapped_index
*map
;
2477 offset_type
*metadata
;
2478 const gdb_byte
*cu_list
;
2479 const gdb_byte
*types_list
= NULL
;
2480 offset_type version
, cu_list_elements
;
2481 offset_type types_list_elements
= 0;
2484 if (dwarf2_section_empty_p (&dwarf2_per_objfile
->gdb_index
))
2487 /* Older elfutils strip versions could keep the section in the main
2488 executable while splitting it for the separate debug info file. */
2489 if ((bfd_get_file_flags (dwarf2_per_objfile
->gdb_index
.asection
)
2490 & SEC_HAS_CONTENTS
) == 0)
2493 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
2495 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
2496 /* Version check. */
2497 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2498 /* Versions earlier than 3 emitted every copy of a psymbol. This
2499 causes the index to behave very poorly for certain requests. Version 3
2500 contained incomplete addrmap. So, it seems better to just ignore such
2504 static int warning_printed
= 0;
2505 if (!warning_printed
)
2507 warning (_("Skipping obsolete .gdb_index section in %s."),
2509 warning_printed
= 1;
2513 /* Index version 4 uses a different hash function than index version
2516 Versions earlier than 6 did not emit psymbols for inlined
2517 functions. Using these files will cause GDB not to be able to
2518 set breakpoints on inlined functions by name, so we ignore these
2519 indices unless the --use-deprecated-index-sections command line
2520 option was supplied. */
2521 if (version
< 6 && !use_deprecated_index_sections
)
2523 static int warning_printed
= 0;
2524 if (!warning_printed
)
2526 warning (_("Skipping deprecated .gdb_index section in %s, pass "
2527 "--use-deprecated-index-sections to use them anyway"),
2529 warning_printed
= 1;
2533 /* Indexes with higher version than the one supported by GDB may be no
2534 longer backward compatible. */
2538 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
2539 map
->version
= version
;
2540 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
2542 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2545 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2546 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2550 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2551 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2552 - MAYBE_SWAP (metadata
[i
]))
2556 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2557 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2558 - MAYBE_SWAP (metadata
[i
]));
2561 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2562 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2563 - MAYBE_SWAP (metadata
[i
]))
2564 / (2 * sizeof (offset_type
)));
2567 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2569 /* Don't use the index if it's empty. */
2570 if (map
->symbol_table_slots
== 0)
2573 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
2576 if (types_list_elements
)
2578 struct dwarf2_section_info
*section
;
2580 /* We can only handle a single .debug_types when we have an
2582 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
2585 section
= VEC_index (dwarf2_section_info_def
,
2586 dwarf2_per_objfile
->types
, 0);
2588 if (!create_signatured_type_table_from_index (objfile
, section
,
2590 types_list_elements
))
2594 create_addrmap_from_index (objfile
, map
);
2596 dwarf2_per_objfile
->index_table
= map
;
2597 dwarf2_per_objfile
->using_index
= 1;
2598 dwarf2_per_objfile
->quick_file_names_table
=
2599 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2604 /* A helper for the "quick" functions which sets the global
2605 dwarf2_per_objfile according to OBJFILE. */
2608 dw2_setup (struct objfile
*objfile
)
2610 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2611 gdb_assert (dwarf2_per_objfile
);
2614 /* Reader function for dw2_build_type_unit_groups. */
2617 dw2_build_type_unit_groups_reader (const struct die_reader_specs
*reader
,
2619 struct die_info
*type_unit_die
,
2623 struct dwarf2_cu
*cu
= reader
->cu
;
2624 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
2625 struct attribute
*attr
;
2626 struct type_unit_group
*tu_group
;
2628 gdb_assert (data
== NULL
);
2633 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
2634 /* Call this for its side-effect of creating the associated
2635 struct type_unit_group if it doesn't already exist. */
2636 tu_group
= get_type_unit_group (per_cu
, attr
);
2639 /* Build dwarf2_per_objfile->type_unit_groups.
2640 This function may be called multiple times. */
2643 dw2_build_type_unit_groups (void)
2645 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
2646 build_type_unit_groups (dw2_build_type_unit_groups_reader
, NULL
);
2649 /* die_reader_func for dw2_get_file_names. */
2652 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
2654 struct die_info
*comp_unit_die
,
2658 struct dwarf2_cu
*cu
= reader
->cu
;
2659 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
2660 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2661 struct line_header
*lh
;
2662 struct attribute
*attr
;
2664 char *name
, *comp_dir
;
2666 struct quick_file_names
*qfn
;
2667 unsigned int line_offset
;
2669 /* Our callers never want to match partial units -- instead they
2670 will match the enclosing full CU. */
2671 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
2673 this_cu
->v
.quick
->no_file_data
= 1;
2681 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
2684 struct quick_file_names find_entry
;
2686 line_offset
= DW_UNSND (attr
);
2688 /* We may have already read in this line header (TU line header sharing).
2689 If we have we're done. */
2690 find_entry
.offset
= line_offset
;
2691 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2692 &find_entry
, INSERT
);
2695 this_cu
->v
.quick
->file_names
= *slot
;
2699 lh
= dwarf_decode_line_header (line_offset
, cu
);
2703 this_cu
->v
.quick
->no_file_data
= 1;
2707 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2708 qfn
->offset
= line_offset
;
2709 gdb_assert (slot
!= NULL
);
2712 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
2714 qfn
->num_file_names
= lh
->num_file_names
;
2715 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2716 lh
->num_file_names
* sizeof (char *));
2717 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2718 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2719 qfn
->real_names
= NULL
;
2721 free_line_header (lh
);
2723 this_cu
->v
.quick
->file_names
= qfn
;
2726 /* A helper for the "quick" functions which attempts to read the line
2727 table for THIS_CU. */
2729 static struct quick_file_names
*
2730 dw2_get_file_names (struct objfile
*objfile
,
2731 struct dwarf2_per_cu_data
*this_cu
)
2733 /* For TUs this should only be called on the parent group. */
2734 if (this_cu
->is_debug_types
)
2735 gdb_assert (IS_TYPE_UNIT_GROUP (this_cu
));
2737 if (this_cu
->v
.quick
->file_names
!= NULL
)
2738 return this_cu
->v
.quick
->file_names
;
2739 /* If we know there is no line data, no point in looking again. */
2740 if (this_cu
->v
.quick
->no_file_data
)
2743 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2744 in the stub for CUs, there's is no need to lookup the DWO file.
2745 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2747 if (this_cu
->is_debug_types
)
2748 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
2749 dw2_get_file_names_reader
, NULL
);
2751 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
2753 if (this_cu
->v
.quick
->no_file_data
)
2755 return this_cu
->v
.quick
->file_names
;
2758 /* A helper for the "quick" functions which computes and caches the
2759 real path for a given file name from the line table. */
2762 dw2_get_real_path (struct objfile
*objfile
,
2763 struct quick_file_names
*qfn
, int index
)
2765 if (qfn
->real_names
== NULL
)
2766 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2767 qfn
->num_file_names
, sizeof (char *));
2769 if (qfn
->real_names
[index
] == NULL
)
2770 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2772 return qfn
->real_names
[index
];
2775 static struct symtab
*
2776 dw2_find_last_source_symtab (struct objfile
*objfile
)
2780 dw2_setup (objfile
);
2781 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2782 return dw2_instantiate_symtab (dw2_get_cu (index
));
2785 /* Traversal function for dw2_forget_cached_source_info. */
2788 dw2_free_cached_file_names (void **slot
, void *info
)
2790 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2792 if (file_data
->real_names
)
2796 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2798 xfree ((void*) file_data
->real_names
[i
]);
2799 file_data
->real_names
[i
] = NULL
;
2807 dw2_forget_cached_source_info (struct objfile
*objfile
)
2809 dw2_setup (objfile
);
2811 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
2812 dw2_free_cached_file_names
, NULL
);
2815 /* Helper function for dw2_map_symtabs_matching_filename that expands
2816 the symtabs and calls the iterator. */
2819 dw2_map_expand_apply (struct objfile
*objfile
,
2820 struct dwarf2_per_cu_data
*per_cu
,
2822 const char *full_path
, const char *real_path
,
2823 int (*callback
) (struct symtab
*, void *),
2826 struct symtab
*last_made
= objfile
->symtabs
;
2828 /* Don't visit already-expanded CUs. */
2829 if (per_cu
->v
.quick
->symtab
)
2832 /* This may expand more than one symtab, and we want to iterate over
2834 dw2_instantiate_symtab (per_cu
);
2836 return iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
2837 objfile
->symtabs
, last_made
);
2840 /* Implementation of the map_symtabs_matching_filename method. */
2843 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
2844 const char *full_path
, const char *real_path
,
2845 int (*callback
) (struct symtab
*, void *),
2849 const char *name_basename
= lbasename (name
);
2850 int name_len
= strlen (name
);
2851 int is_abs
= IS_ABSOLUTE_PATH (name
);
2853 dw2_setup (objfile
);
2855 dw2_build_type_unit_groups ();
2857 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2858 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
2861 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
2862 struct quick_file_names
*file_data
;
2864 /* We only need to look at symtabs not already expanded. */
2865 if (per_cu
->v
.quick
->symtab
)
2868 file_data
= dw2_get_file_names (objfile
, per_cu
);
2869 if (file_data
== NULL
)
2872 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2874 const char *this_name
= file_data
->file_names
[j
];
2876 if (FILENAME_CMP (name
, this_name
) == 0
2877 || (!is_abs
&& compare_filenames_for_search (this_name
,
2880 if (dw2_map_expand_apply (objfile
, per_cu
,
2881 name
, full_path
, real_path
,
2886 /* Before we invoke realpath, which can get expensive when many
2887 files are involved, do a quick comparison of the basenames. */
2888 if (! basenames_may_differ
2889 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
2892 if (full_path
!= NULL
)
2894 const char *this_real_name
= dw2_get_real_path (objfile
,
2897 if (this_real_name
!= NULL
2898 && (FILENAME_CMP (full_path
, this_real_name
) == 0
2900 && compare_filenames_for_search (this_real_name
,
2903 if (dw2_map_expand_apply (objfile
, per_cu
,
2904 name
, full_path
, real_path
,
2910 if (real_path
!= NULL
)
2912 const char *this_real_name
= dw2_get_real_path (objfile
,
2915 if (this_real_name
!= NULL
2916 && (FILENAME_CMP (real_path
, this_real_name
) == 0
2918 && compare_filenames_for_search (this_real_name
,
2921 if (dw2_map_expand_apply (objfile
, per_cu
,
2922 name
, full_path
, real_path
,
2933 static struct symtab
*
2934 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2935 const char *name
, domain_enum domain
)
2937 /* We do all the work in the pre_expand_symtabs_matching hook
2942 /* A helper function that expands all symtabs that hold an object
2943 named NAME. If WANT_SPECIFIC_BLOCK is non-zero, only look for
2944 symbols in block BLOCK_KIND. */
2947 dw2_do_expand_symtabs_matching (struct objfile
*objfile
,
2948 int want_specific_block
,
2949 enum block_enum block_kind
,
2950 const char *name
, domain_enum domain
)
2952 struct mapped_index
*index
;
2954 dw2_setup (objfile
);
2956 index
= dwarf2_per_objfile
->index_table
;
2958 /* index_table is NULL if OBJF_READNOW. */
2963 if (find_slot_in_mapped_hash (index
, name
, &vec
))
2965 offset_type i
, len
= MAYBE_SWAP (*vec
);
2966 for (i
= 0; i
< len
; ++i
)
2968 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[i
+ 1]);
2969 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
2970 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2971 int want_static
= block_kind
!= GLOBAL_BLOCK
;
2972 /* This value is only valid for index versions >= 7. */
2973 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
2974 gdb_index_symbol_kind symbol_kind
=
2975 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
2977 if (want_specific_block
2978 && index
->version
>= 7
2979 && want_static
!= is_static
)
2982 /* Only check the symbol's kind if it has one.
2983 Indices prior to version 7 don't record it. */
2984 if (index
->version
>= 7)
2989 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
2990 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
2991 /* Some types are also in VAR_DOMAIN. */
2992 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
2996 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3000 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3008 dw2_instantiate_symtab (per_cu
);
3015 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
3016 enum block_enum block_kind
, const char *name
,
3019 dw2_do_expand_symtabs_matching (objfile
, 1, block_kind
, name
, domain
);
3023 dw2_print_stats (struct objfile
*objfile
)
3027 dw2_setup (objfile
);
3029 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3030 + dwarf2_per_objfile
->n_type_units
); ++i
)
3032 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3034 if (!per_cu
->v
.quick
->symtab
)
3037 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3041 dw2_dump (struct objfile
*objfile
)
3043 /* Nothing worth printing. */
3047 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
3048 struct section_offsets
*delta
)
3050 /* There's nothing to relocate here. */
3054 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3055 const char *func_name
)
3057 /* Note: It doesn't matter what we pass for block_kind here. */
3058 dw2_do_expand_symtabs_matching (objfile
, 0, GLOBAL_BLOCK
, func_name
,
3063 dw2_expand_all_symtabs (struct objfile
*objfile
)
3067 dw2_setup (objfile
);
3069 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3070 + dwarf2_per_objfile
->n_type_units
); ++i
)
3072 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3074 dw2_instantiate_symtab (per_cu
);
3079 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
3080 const char *filename
)
3084 dw2_setup (objfile
);
3086 /* We don't need to consider type units here.
3087 This is only called for examining code, e.g. expand_line_sal.
3088 There can be an order of magnitude (or more) more type units
3089 than comp units, and we avoid them if we can. */
3091 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3094 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3095 struct quick_file_names
*file_data
;
3097 /* We only need to look at symtabs not already expanded. */
3098 if (per_cu
->v
.quick
->symtab
)
3101 file_data
= dw2_get_file_names (objfile
, per_cu
);
3102 if (file_data
== NULL
)
3105 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3107 const char *this_name
= file_data
->file_names
[j
];
3108 if (FILENAME_CMP (this_name
, filename
) == 0)
3110 dw2_instantiate_symtab (per_cu
);
3117 /* A helper function for dw2_find_symbol_file that finds the primary
3118 file name for a given CU. This is a die_reader_func. */
3121 dw2_get_primary_filename_reader (const struct die_reader_specs
*reader
,
3123 struct die_info
*comp_unit_die
,
3127 const char **result_ptr
= data
;
3128 struct dwarf2_cu
*cu
= reader
->cu
;
3129 struct attribute
*attr
;
3131 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
3135 *result_ptr
= DW_STRING (attr
);
3139 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
3141 struct dwarf2_per_cu_data
*per_cu
;
3143 struct quick_file_names
*file_data
;
3144 const char *filename
;
3146 dw2_setup (objfile
);
3148 /* index_table is NULL if OBJF_READNOW. */
3149 if (!dwarf2_per_objfile
->index_table
)
3153 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
3155 struct blockvector
*bv
= BLOCKVECTOR (s
);
3156 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
3157 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
3160 return sym
->symtab
->filename
;
3165 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
3169 /* Note that this just looks at the very first one named NAME -- but
3170 actually we are looking for a function. find_main_filename
3171 should be rewritten so that it doesn't require a custom hook. It
3172 could just use the ordinary symbol tables. */
3173 /* vec[0] is the length, which must always be >0. */
3174 per_cu
= dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec
[1])));
3176 if (per_cu
->v
.quick
->symtab
!= NULL
)
3177 return per_cu
->v
.quick
->symtab
->filename
;
3179 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
3180 dw2_get_primary_filename_reader
, &filename
);
3186 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
3187 struct objfile
*objfile
, int global
,
3188 int (*callback
) (struct block
*,
3189 struct symbol
*, void *),
3190 void *data
, symbol_compare_ftype
*match
,
3191 symbol_compare_ftype
*ordered_compare
)
3193 /* Currently unimplemented; used for Ada. The function can be called if the
3194 current language is Ada for a non-Ada objfile using GNU index. As Ada
3195 does not look for non-Ada symbols this function should just return. */
3199 dw2_expand_symtabs_matching
3200 (struct objfile
*objfile
,
3201 int (*file_matcher
) (const char *, void *),
3202 int (*name_matcher
) (const char *, void *),
3203 enum search_domain kind
,
3208 struct mapped_index
*index
;
3210 dw2_setup (objfile
);
3212 /* index_table is NULL if OBJF_READNOW. */
3213 if (!dwarf2_per_objfile
->index_table
)
3215 index
= dwarf2_per_objfile
->index_table
;
3217 if (file_matcher
!= NULL
)
3219 struct cleanup
*cleanup
;
3220 htab_t visited_found
, visited_not_found
;
3222 dw2_build_type_unit_groups ();
3224 visited_found
= htab_create_alloc (10,
3225 htab_hash_pointer
, htab_eq_pointer
,
3226 NULL
, xcalloc
, xfree
);
3227 cleanup
= make_cleanup_htab_delete (visited_found
);
3228 visited_not_found
= htab_create_alloc (10,
3229 htab_hash_pointer
, htab_eq_pointer
,
3230 NULL
, xcalloc
, xfree
);
3231 make_cleanup_htab_delete (visited_not_found
);
3233 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3234 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
3237 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3238 struct quick_file_names
*file_data
;
3241 per_cu
->v
.quick
->mark
= 0;
3243 /* We only need to look at symtabs not already expanded. */
3244 if (per_cu
->v
.quick
->symtab
)
3247 file_data
= dw2_get_file_names (objfile
, per_cu
);
3248 if (file_data
== NULL
)
3251 if (htab_find (visited_not_found
, file_data
) != NULL
)
3253 else if (htab_find (visited_found
, file_data
) != NULL
)
3255 per_cu
->v
.quick
->mark
= 1;
3259 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3261 if (file_matcher (file_data
->file_names
[j
], data
))
3263 per_cu
->v
.quick
->mark
= 1;
3268 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3270 : visited_not_found
,
3275 do_cleanups (cleanup
);
3278 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3280 offset_type idx
= 2 * iter
;
3282 offset_type
*vec
, vec_len
, vec_idx
;
3284 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3287 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3289 if (! (*name_matcher
) (name
, data
))
3292 /* The name was matched, now expand corresponding CUs that were
3294 vec
= (offset_type
*) (index
->constant_pool
3295 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3296 vec_len
= MAYBE_SWAP (vec
[0]);
3297 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3299 struct dwarf2_per_cu_data
*per_cu
;
3300 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3301 gdb_index_symbol_kind symbol_kind
=
3302 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3303 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3305 /* Don't crash on bad data. */
3306 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3307 + dwarf2_per_objfile
->n_type_units
))
3310 /* Only check the symbol's kind if it has one.
3311 Indices prior to version 7 don't record it. */
3312 if (index
->version
>= 7)
3316 case VARIABLES_DOMAIN
:
3317 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3320 case FUNCTIONS_DOMAIN
:
3321 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3325 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3333 per_cu
= dw2_get_cu (cu_index
);
3334 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3335 dw2_instantiate_symtab (per_cu
);
3340 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3343 static struct symtab
*
3344 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3348 if (BLOCKVECTOR (symtab
) != NULL
3349 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3352 if (symtab
->includes
== NULL
)
3355 for (i
= 0; symtab
->includes
[i
]; ++i
)
3357 struct symtab
*s
= symtab
->includes
[i
];
3359 s
= recursively_find_pc_sect_symtab (s
, pc
);
3367 static struct symtab
*
3368 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
3369 struct minimal_symbol
*msymbol
,
3371 struct obj_section
*section
,
3374 struct dwarf2_per_cu_data
*data
;
3375 struct symtab
*result
;
3377 dw2_setup (objfile
);
3379 if (!objfile
->psymtabs_addrmap
)
3382 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
3386 if (warn_if_readin
&& data
->v
.quick
->symtab
)
3387 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3388 paddress (get_objfile_arch (objfile
), pc
));
3390 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
3391 gdb_assert (result
!= NULL
);
3396 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
3397 void *data
, int need_fullname
)
3400 struct cleanup
*cleanup
;
3401 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
3402 NULL
, xcalloc
, xfree
);
3404 cleanup
= make_cleanup_htab_delete (visited
);
3405 dw2_setup (objfile
);
3407 dw2_build_type_unit_groups ();
3409 /* We can ignore file names coming from already-expanded CUs. */
3410 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3411 + dwarf2_per_objfile
->n_type_units
); ++i
)
3413 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3415 if (per_cu
->v
.quick
->symtab
)
3417 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
3420 *slot
= per_cu
->v
.quick
->file_names
;
3424 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3425 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
3428 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3429 struct quick_file_names
*file_data
;
3432 /* We only need to look at symtabs not already expanded. */
3433 if (per_cu
->v
.quick
->symtab
)
3436 file_data
= dw2_get_file_names (objfile
, per_cu
);
3437 if (file_data
== NULL
)
3440 slot
= htab_find_slot (visited
, file_data
, INSERT
);
3443 /* Already visited. */
3448 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3450 const char *this_real_name
;
3453 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3455 this_real_name
= NULL
;
3456 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
3460 do_cleanups (cleanup
);
3464 dw2_has_symbols (struct objfile
*objfile
)
3469 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
3472 dw2_find_last_source_symtab
,
3473 dw2_forget_cached_source_info
,
3474 dw2_map_symtabs_matching_filename
,
3476 dw2_pre_expand_symtabs_matching
,
3480 dw2_expand_symtabs_for_function
,
3481 dw2_expand_all_symtabs
,
3482 dw2_expand_symtabs_with_filename
,
3483 dw2_find_symbol_file
,
3484 dw2_map_matching_symbols
,
3485 dw2_expand_symtabs_matching
,
3486 dw2_find_pc_sect_symtab
,
3487 dw2_map_symbol_filenames
3490 /* Initialize for reading DWARF for this objfile. Return 0 if this
3491 file will use psymtabs, or 1 if using the GNU index. */
3494 dwarf2_initialize_objfile (struct objfile
*objfile
)
3496 /* If we're about to read full symbols, don't bother with the
3497 indices. In this case we also don't care if some other debug
3498 format is making psymtabs, because they are all about to be
3500 if ((objfile
->flags
& OBJF_READNOW
))
3504 dwarf2_per_objfile
->using_index
= 1;
3505 create_all_comp_units (objfile
);
3506 create_all_type_units (objfile
);
3507 dwarf2_per_objfile
->quick_file_names_table
=
3508 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3510 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3511 + dwarf2_per_objfile
->n_type_units
); ++i
)
3513 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3515 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3516 struct dwarf2_per_cu_quick_data
);
3519 /* Return 1 so that gdb sees the "quick" functions. However,
3520 these functions will be no-ops because we will have expanded
3525 if (dwarf2_read_index (objfile
))
3533 /* Build a partial symbol table. */
3536 dwarf2_build_psymtabs (struct objfile
*objfile
)
3538 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3540 init_psymbol_list (objfile
, 1024);
3543 dwarf2_build_psymtabs_hard (objfile
);
3546 /* Return the total length of the CU described by HEADER. */
3549 get_cu_length (const struct comp_unit_head
*header
)
3551 return header
->initial_length_size
+ header
->length
;
3554 /* Return TRUE if OFFSET is within CU_HEADER. */
3557 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
3559 sect_offset bottom
= { cu_header
->offset
.sect_off
};
3560 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
3562 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
3565 /* Find the base address of the compilation unit for range lists and
3566 location lists. It will normally be specified by DW_AT_low_pc.
3567 In DWARF-3 draft 4, the base address could be overridden by
3568 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3569 compilation units with discontinuous ranges. */
3572 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3574 struct attribute
*attr
;
3577 cu
->base_address
= 0;
3579 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3582 cu
->base_address
= DW_ADDR (attr
);
3587 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3590 cu
->base_address
= DW_ADDR (attr
);
3596 /* Read in the comp unit header information from the debug_info at info_ptr.
3597 NOTE: This leaves members offset, first_die_offset to be filled in
3601 read_comp_unit_head (struct comp_unit_head
*cu_header
,
3602 gdb_byte
*info_ptr
, bfd
*abfd
)
3605 unsigned int bytes_read
;
3607 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
3608 cu_header
->initial_length_size
= bytes_read
;
3609 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
3610 info_ptr
+= bytes_read
;
3611 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
3613 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
3615 info_ptr
+= bytes_read
;
3616 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
3618 signed_addr
= bfd_get_sign_extend_vma (abfd
);
3619 if (signed_addr
< 0)
3620 internal_error (__FILE__
, __LINE__
,
3621 _("read_comp_unit_head: dwarf from non elf file"));
3622 cu_header
->signed_addr_p
= signed_addr
;
3627 /* Subroutine of read_and_check_comp_unit_head and
3628 read_and_check_type_unit_head to simplify them.
3629 Perform various error checking on the header. */
3632 error_check_comp_unit_head (struct comp_unit_head
*header
,
3633 struct dwarf2_section_info
*section
,
3634 struct dwarf2_section_info
*abbrev_section
)
3636 bfd
*abfd
= section
->asection
->owner
;
3637 const char *filename
= bfd_get_filename (abfd
);
3639 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3640 error (_("Dwarf Error: wrong version in compilation unit header "
3641 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3644 if (header
->abbrev_offset
.sect_off
3645 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
,
3646 &dwarf2_per_objfile
->abbrev
))
3647 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3648 "(offset 0x%lx + 6) [in module %s]"),
3649 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
3652 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3653 avoid potential 32-bit overflow. */
3654 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
3656 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3657 "(offset 0x%lx + 0) [in module %s]"),
3658 (long) header
->length
, (long) header
->offset
.sect_off
,
3662 /* Read in a CU/TU header and perform some basic error checking.
3663 The contents of the header are stored in HEADER.
3664 The result is a pointer to the start of the first DIE. */
3667 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3668 struct dwarf2_section_info
*section
,
3669 struct dwarf2_section_info
*abbrev_section
,
3671 int is_debug_types_section
)
3673 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3674 bfd
*abfd
= section
->asection
->owner
;
3676 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3678 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3680 /* If we're reading a type unit, skip over the signature and
3681 type_offset fields. */
3682 if (is_debug_types_section
)
3683 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
3685 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3687 error_check_comp_unit_head (header
, section
, abbrev_section
);
3692 /* Read in the types comp unit header information from .debug_types entry at
3693 types_ptr. The result is a pointer to one past the end of the header. */
3696 read_and_check_type_unit_head (struct comp_unit_head
*header
,
3697 struct dwarf2_section_info
*section
,
3698 struct dwarf2_section_info
*abbrev_section
,
3700 ULONGEST
*signature
,
3701 cu_offset
*type_offset_in_tu
)
3703 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3704 bfd
*abfd
= section
->asection
->owner
;
3706 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3708 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3710 /* If we're reading a type unit, skip over the signature and
3711 type_offset fields. */
3712 if (signature
!= NULL
)
3713 *signature
= read_8_bytes (abfd
, info_ptr
);
3715 if (type_offset_in_tu
!= NULL
)
3716 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
3717 header
->offset_size
);
3718 info_ptr
+= header
->offset_size
;
3720 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3722 error_check_comp_unit_head (header
, section
, abbrev_section
);
3727 /* Fetch the abbreviation table offset from a comp or type unit header. */
3730 read_abbrev_offset (struct dwarf2_section_info
*section
,
3733 bfd
*abfd
= section
->asection
->owner
;
3735 unsigned int length
, initial_length_size
, offset_size
;
3736 sect_offset abbrev_offset
;
3738 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
3739 info_ptr
= section
->buffer
+ offset
.sect_off
;
3740 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
3741 offset_size
= initial_length_size
== 4 ? 4 : 8;
3742 info_ptr
+= initial_length_size
+ 2 /*version*/;
3743 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
3744 return abbrev_offset
;
3747 /* Allocate a new partial symtab for file named NAME and mark this new
3748 partial symtab as being an include of PST. */
3751 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
3752 struct objfile
*objfile
)
3754 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
3756 subpst
->section_offsets
= pst
->section_offsets
;
3757 subpst
->textlow
= 0;
3758 subpst
->texthigh
= 0;
3760 subpst
->dependencies
= (struct partial_symtab
**)
3761 obstack_alloc (&objfile
->objfile_obstack
,
3762 sizeof (struct partial_symtab
*));
3763 subpst
->dependencies
[0] = pst
;
3764 subpst
->number_of_dependencies
= 1;
3766 subpst
->globals_offset
= 0;
3767 subpst
->n_global_syms
= 0;
3768 subpst
->statics_offset
= 0;
3769 subpst
->n_static_syms
= 0;
3770 subpst
->symtab
= NULL
;
3771 subpst
->read_symtab
= pst
->read_symtab
;
3774 /* No private part is necessary for include psymtabs. This property
3775 can be used to differentiate between such include psymtabs and
3776 the regular ones. */
3777 subpst
->read_symtab_private
= NULL
;
3780 /* Read the Line Number Program data and extract the list of files
3781 included by the source file represented by PST. Build an include
3782 partial symtab for each of these included files. */
3785 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
3786 struct die_info
*die
,
3787 struct partial_symtab
*pst
)
3789 struct line_header
*lh
= NULL
;
3790 struct attribute
*attr
;
3792 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3794 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
3796 return; /* No linetable, so no includes. */
3798 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
3799 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
3801 free_line_header (lh
);
3805 hash_signatured_type (const void *item
)
3807 const struct signatured_type
*sig_type
= item
;
3809 /* This drops the top 32 bits of the signature, but is ok for a hash. */
3810 return sig_type
->signature
;
3814 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
3816 const struct signatured_type
*lhs
= item_lhs
;
3817 const struct signatured_type
*rhs
= item_rhs
;
3819 return lhs
->signature
== rhs
->signature
;
3822 /* Allocate a hash table for signatured types. */
3825 allocate_signatured_type_table (struct objfile
*objfile
)
3827 return htab_create_alloc_ex (41,
3828 hash_signatured_type
,
3831 &objfile
->objfile_obstack
,
3832 hashtab_obstack_allocate
,
3833 dummy_obstack_deallocate
);
3836 /* A helper function to add a signatured type CU to a table. */
3839 add_signatured_type_cu_to_table (void **slot
, void *datum
)
3841 struct signatured_type
*sigt
= *slot
;
3842 struct signatured_type
***datap
= datum
;
3850 /* Create the hash table of all entries in the .debug_types section.
3851 DWO_FILE is a pointer to the DWO file for .debug_types.dwo, NULL otherwise.
3852 The result is a pointer to the hash table or NULL if there are
3856 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
3857 VEC (dwarf2_section_info_def
) *types
)
3859 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3860 htab_t types_htab
= NULL
;
3862 struct dwarf2_section_info
*section
;
3863 struct dwarf2_section_info
*abbrev_section
;
3865 if (VEC_empty (dwarf2_section_info_def
, types
))
3868 abbrev_section
= (dwo_file
!= NULL
3869 ? &dwo_file
->sections
.abbrev
3870 : &dwarf2_per_objfile
->abbrev
);
3872 if (dwarf2_read_debug
)
3873 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
3874 dwo_file
? ".dwo" : "",
3875 bfd_get_filename (abbrev_section
->asection
->owner
));
3878 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
3882 gdb_byte
*info_ptr
, *end_ptr
;
3884 dwarf2_read_section (objfile
, section
);
3885 info_ptr
= section
->buffer
;
3887 if (info_ptr
== NULL
)
3890 /* We can't set abfd until now because the section may be empty or
3891 not present, in which case section->asection will be NULL. */
3892 abfd
= section
->asection
->owner
;
3894 if (types_htab
== NULL
)
3897 types_htab
= allocate_dwo_unit_table (objfile
);
3899 types_htab
= allocate_signatured_type_table (objfile
);
3902 /* We don't use init_cutu_and_read_dies_simple, or some such, here
3903 because we don't need to read any dies: the signature is in the
3906 end_ptr
= info_ptr
+ section
->size
;
3907 while (info_ptr
< end_ptr
)
3910 cu_offset type_offset_in_tu
;
3912 struct signatured_type
*sig_type
;
3913 struct dwo_unit
*dwo_tu
;
3915 gdb_byte
*ptr
= info_ptr
;
3916 struct comp_unit_head header
;
3917 unsigned int length
;
3919 offset
.sect_off
= ptr
- section
->buffer
;
3921 /* We need to read the type's signature in order to build the hash
3922 table, but we don't need anything else just yet. */
3924 ptr
= read_and_check_type_unit_head (&header
, section
,
3925 abbrev_section
, ptr
,
3926 &signature
, &type_offset_in_tu
);
3928 length
= get_cu_length (&header
);
3930 /* Skip dummy type units. */
3931 if (ptr
>= info_ptr
+ length
3932 || peek_abbrev_code (abfd
, ptr
) == 0)
3941 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3943 dwo_tu
->dwo_file
= dwo_file
;
3944 dwo_tu
->signature
= signature
;
3945 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
3946 dwo_tu
->info_or_types_section
= section
;
3947 dwo_tu
->offset
= offset
;
3948 dwo_tu
->length
= length
;
3952 /* N.B.: type_offset is not usable if this type uses a DWO file.
3953 The real type_offset is in the DWO file. */
3955 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3956 struct signatured_type
);
3957 sig_type
->signature
= signature
;
3958 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3959 sig_type
->per_cu
.objfile
= objfile
;
3960 sig_type
->per_cu
.is_debug_types
= 1;
3961 sig_type
->per_cu
.info_or_types_section
= section
;
3962 sig_type
->per_cu
.offset
= offset
;
3963 sig_type
->per_cu
.length
= length
;
3966 slot
= htab_find_slot (types_htab
,
3967 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
3969 gdb_assert (slot
!= NULL
);
3972 sect_offset dup_offset
;
3976 const struct dwo_unit
*dup_tu
= *slot
;
3978 dup_offset
= dup_tu
->offset
;
3982 const struct signatured_type
*dup_tu
= *slot
;
3984 dup_offset
= dup_tu
->per_cu
.offset
;
3987 complaint (&symfile_complaints
,
3988 _("debug type entry at offset 0x%x is duplicate to the "
3989 "entry at offset 0x%x, signature 0x%s"),
3990 offset
.sect_off
, dup_offset
.sect_off
,
3991 phex (signature
, sizeof (signature
)));
3993 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
3995 if (dwarf2_read_debug
)
3996 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
3998 phex (signature
, sizeof (signature
)));
4007 /* Create the hash table of all entries in the .debug_types section,
4008 and initialize all_type_units.
4009 The result is zero if there is an error (e.g. missing .debug_types section),
4010 otherwise non-zero. */
4013 create_all_type_units (struct objfile
*objfile
)
4016 struct signatured_type
**iter
;
4018 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4019 if (types_htab
== NULL
)
4021 dwarf2_per_objfile
->signatured_types
= NULL
;
4025 dwarf2_per_objfile
->signatured_types
= types_htab
;
4027 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
4028 dwarf2_per_objfile
->all_type_units
4029 = obstack_alloc (&objfile
->objfile_obstack
,
4030 dwarf2_per_objfile
->n_type_units
4031 * sizeof (struct signatured_type
*));
4032 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4033 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4034 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4035 == dwarf2_per_objfile
->n_type_units
);
4040 /* Lookup a signature based type for DW_FORM_ref_sig8.
4041 Returns NULL if signature SIG is not present in the table. */
4043 static struct signatured_type
*
4044 lookup_signatured_type (ULONGEST sig
)
4046 struct signatured_type find_entry
, *entry
;
4048 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4050 complaint (&symfile_complaints
,
4051 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
4055 find_entry
.signature
= sig
;
4056 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4060 /* Low level DIE reading support. */
4062 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4065 init_cu_die_reader (struct die_reader_specs
*reader
,
4066 struct dwarf2_cu
*cu
,
4067 struct dwarf2_section_info
*section
,
4068 struct dwo_file
*dwo_file
)
4070 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
4071 reader
->abfd
= section
->asection
->owner
;
4073 reader
->dwo_file
= dwo_file
;
4074 reader
->die_section
= section
;
4075 reader
->buffer
= section
->buffer
;
4076 reader
->buffer_end
= section
->buffer
+ section
->size
;
4079 /* Initialize a CU (or TU) and read its DIEs.
4080 If the CU defers to a DWO file, read the DWO file as well.
4082 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
4083 Otherwise the table specified in the comp unit header is read in and used.
4084 This is an optimization for when we already have the abbrev table.
4086 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
4087 Otherwise, a new CU is allocated with xmalloc.
4089 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
4090 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
4092 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4093 linker) then DIE_READER_FUNC will not get called. */
4096 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
4097 struct abbrev_table
*abbrev_table
,
4098 int use_existing_cu
, int keep
,
4099 die_reader_func_ftype
*die_reader_func
,
4102 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4103 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4104 bfd
*abfd
= section
->asection
->owner
;
4105 struct dwarf2_cu
*cu
;
4106 gdb_byte
*begin_info_ptr
, *info_ptr
;
4107 struct die_reader_specs reader
;
4108 struct die_info
*comp_unit_die
;
4110 struct attribute
*attr
;
4111 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
4112 struct signatured_type
*sig_type
= NULL
;
4113 struct dwarf2_section_info
*abbrev_section
;
4114 /* Non-zero if CU currently points to a DWO file and we need to
4115 reread it. When this happens we need to reread the skeleton die
4116 before we can reread the DWO file. */
4117 int rereading_dwo_cu
= 0;
4119 if (dwarf2_die_debug
)
4120 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4121 this_cu
->is_debug_types
? "type" : "comp",
4122 this_cu
->offset
.sect_off
);
4124 if (use_existing_cu
)
4127 cleanups
= make_cleanup (null_cleanup
, NULL
);
4129 /* This is cheap if the section is already read in. */
4130 dwarf2_read_section (objfile
, section
);
4132 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4133 abbrev_section
= &dwarf2_per_objfile
->abbrev
;
4135 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
4139 /* If this CU is from a DWO file we need to start over, we need to
4140 refetch the attributes from the skeleton CU.
4141 This could be optimized by retrieving those attributes from when we
4142 were here the first time: the previous comp_unit_die was stored in
4143 comp_unit_obstack. But there's no data yet that we need this
4145 if (cu
->dwo_unit
!= NULL
)
4146 rereading_dwo_cu
= 1;
4150 /* If !use_existing_cu, this_cu->cu must be NULL. */
4151 gdb_assert (this_cu
->cu
== NULL
);
4153 cu
= xmalloc (sizeof (*cu
));
4154 init_one_comp_unit (cu
, this_cu
);
4156 /* If an error occurs while loading, release our storage. */
4157 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
4160 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
4162 /* We already have the header, there's no need to read it in again. */
4163 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
4167 if (this_cu
->is_debug_types
)
4170 cu_offset type_offset_in_tu
;
4172 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4173 abbrev_section
, info_ptr
,
4175 &type_offset_in_tu
);
4177 /* Since per_cu is the first member of struct signatured_type,
4178 we can go from a pointer to one to a pointer to the other. */
4179 sig_type
= (struct signatured_type
*) this_cu
;
4180 gdb_assert (sig_type
->signature
== signature
);
4181 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
4182 == type_offset_in_tu
.cu_off
);
4183 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4185 /* LENGTH has not been set yet for type units if we're
4186 using .gdb_index. */
4187 this_cu
->length
= get_cu_length (&cu
->header
);
4189 /* Establish the type offset that can be used to lookup the type. */
4190 sig_type
->type_offset_in_section
.sect_off
=
4191 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
4195 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4199 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4200 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
4204 /* Skip dummy compilation units. */
4205 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4206 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4208 do_cleanups (cleanups
);
4212 /* If we don't have them yet, read the abbrevs for this compilation unit.
4213 And if we need to read them now, make sure they're freed when we're
4214 done. Note that it's important that if the CU had an abbrev table
4215 on entry we don't free it when we're done: Somewhere up the call stack
4216 it may be in use. */
4217 if (abbrev_table
!= NULL
)
4219 gdb_assert (cu
->abbrev_table
== NULL
);
4220 gdb_assert (cu
->header
.abbrev_offset
.sect_off
4221 == abbrev_table
->offset
.sect_off
);
4222 cu
->abbrev_table
= abbrev_table
;
4224 else if (cu
->abbrev_table
== NULL
)
4226 dwarf2_read_abbrevs (cu
, abbrev_section
);
4227 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4229 else if (rereading_dwo_cu
)
4231 dwarf2_free_abbrev_table (cu
);
4232 dwarf2_read_abbrevs (cu
, abbrev_section
);
4235 /* Read the top level CU/TU die. */
4236 init_cu_die_reader (&reader
, cu
, section
, NULL
);
4237 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4239 /* If we have a DWO stub, process it and then read in the DWO file.
4240 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
4241 a DWO CU, that this test will fail. */
4242 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
4245 char *dwo_name
= DW_STRING (attr
);
4246 const char *comp_dir_string
;
4247 struct dwo_unit
*dwo_unit
;
4248 ULONGEST signature
; /* Or dwo_id. */
4249 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
4250 int i
,num_extra_attrs
;
4251 struct dwarf2_section_info
*dwo_abbrev_section
;
4254 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
4255 " has children (offset 0x%x) [in module %s]"),
4256 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
4258 /* These attributes aren't processed until later:
4259 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4260 However, the attribute is found in the stub which we won't have later.
4261 In order to not impose this complication on the rest of the code,
4262 we read them here and copy them to the DWO CU/TU die. */
4264 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4267 if (! this_cu
->is_debug_types
)
4268 stmt_list
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
4269 low_pc
= dwarf2_attr (comp_unit_die
, DW_AT_low_pc
, cu
);
4270 high_pc
= dwarf2_attr (comp_unit_die
, DW_AT_high_pc
, cu
);
4271 ranges
= dwarf2_attr (comp_unit_die
, DW_AT_ranges
, cu
);
4272 comp_dir
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4274 /* There should be a DW_AT_addr_base attribute here (if needed).
4275 We need the value before we can process DW_FORM_GNU_addr_index. */
4277 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
4279 cu
->addr_base
= DW_UNSND (attr
);
4281 /* There should be a DW_AT_ranges_base attribute here (if needed).
4282 We need the value before we can process DW_AT_ranges. */
4283 cu
->ranges_base
= 0;
4284 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
4286 cu
->ranges_base
= DW_UNSND (attr
);
4288 if (this_cu
->is_debug_types
)
4290 gdb_assert (sig_type
!= NULL
);
4291 signature
= sig_type
->signature
;
4295 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
4297 error (_("Dwarf Error: missing dwo_id [in module %s]"),
4299 signature
= DW_UNSND (attr
);
4302 /* We may need the comp_dir in order to find the DWO file. */
4303 comp_dir_string
= NULL
;
4305 comp_dir_string
= DW_STRING (comp_dir
);
4307 if (this_cu
->is_debug_types
)
4308 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir_string
);
4310 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir_string
,
4313 if (dwo_unit
== NULL
)
4315 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
4316 " with ID %s [in module %s]"),
4317 this_cu
->offset
.sect_off
,
4318 phex (signature
, sizeof (signature
)),
4322 /* Set up for reading the DWO CU/TU. */
4323 cu
->dwo_unit
= dwo_unit
;
4324 section
= dwo_unit
->info_or_types_section
;
4325 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
4326 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
4327 init_cu_die_reader (&reader
, cu
, section
, dwo_unit
->dwo_file
);
4329 if (this_cu
->is_debug_types
)
4333 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4337 gdb_assert (sig_type
->signature
== signature
);
4338 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4339 gdb_assert (dwo_unit
->length
== get_cu_length (&cu
->header
));
4341 /* Establish the type offset that can be used to lookup the type.
4342 For DWO files, we don't know it until now. */
4343 sig_type
->type_offset_in_section
.sect_off
=
4344 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
4348 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4351 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4352 gdb_assert (dwo_unit
->length
== get_cu_length (&cu
->header
));
4355 /* Discard the original CU's abbrev table, and read the DWO's. */
4356 if (abbrev_table
== NULL
)
4358 dwarf2_free_abbrev_table (cu
);
4359 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4363 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4364 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4367 /* Read in the die, but leave space to copy over the attributes
4368 from the stub. This has the benefit of simplifying the rest of
4369 the code - all the real work is done here. */
4370 num_extra_attrs
= ((stmt_list
!= NULL
)
4374 + (comp_dir
!= NULL
));
4375 info_ptr
= read_full_die_1 (&reader
, &comp_unit_die
, info_ptr
,
4376 &has_children
, num_extra_attrs
);
4378 /* Copy over the attributes from the stub to the DWO die. */
4379 i
= comp_unit_die
->num_attrs
;
4380 if (stmt_list
!= NULL
)
4381 comp_unit_die
->attrs
[i
++] = *stmt_list
;
4383 comp_unit_die
->attrs
[i
++] = *low_pc
;
4384 if (high_pc
!= NULL
)
4385 comp_unit_die
->attrs
[i
++] = *high_pc
;
4387 comp_unit_die
->attrs
[i
++] = *ranges
;
4388 if (comp_dir
!= NULL
)
4389 comp_unit_die
->attrs
[i
++] = *comp_dir
;
4390 comp_unit_die
->num_attrs
+= num_extra_attrs
;
4392 /* Skip dummy compilation units. */
4393 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
4394 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4396 do_cleanups (cleanups
);
4401 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4403 if (free_cu_cleanup
!= NULL
)
4407 /* We've successfully allocated this compilation unit. Let our
4408 caller clean it up when finished with it. */
4409 discard_cleanups (free_cu_cleanup
);
4411 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4412 So we have to manually free the abbrev table. */
4413 dwarf2_free_abbrev_table (cu
);
4415 /* Link this CU into read_in_chain. */
4416 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4417 dwarf2_per_objfile
->read_in_chain
= this_cu
;
4420 do_cleanups (free_cu_cleanup
);
4423 do_cleanups (cleanups
);
4426 /* Read CU/TU THIS_CU in section SECTION,
4427 but do not follow DW_AT_GNU_dwo_name if present.
4428 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed to
4429 have already done the lookup to find the DWO file).
4431 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4432 THIS_CU->is_debug_types, but nothing else.
4434 We fill in THIS_CU->length.
4436 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4437 linker) then DIE_READER_FUNC will not get called.
4439 THIS_CU->cu is always freed when done.
4440 This is done in order to not leave THIS_CU->cu in a state where we have
4441 to care whether it refers to the "main" CU or the DWO CU. */
4444 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
4445 struct dwarf2_section_info
*abbrev_section
,
4446 struct dwo_file
*dwo_file
,
4447 die_reader_func_ftype
*die_reader_func
,
4450 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4451 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4452 bfd
*abfd
= section
->asection
->owner
;
4453 struct dwarf2_cu cu
;
4454 gdb_byte
*begin_info_ptr
, *info_ptr
;
4455 struct die_reader_specs reader
;
4456 struct cleanup
*cleanups
;
4457 struct die_info
*comp_unit_die
;
4460 if (dwarf2_die_debug
)
4461 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4462 this_cu
->is_debug_types
? "type" : "comp",
4463 this_cu
->offset
.sect_off
);
4465 gdb_assert (this_cu
->cu
== NULL
);
4467 /* This is cheap if the section is already read in. */
4468 dwarf2_read_section (objfile
, section
);
4470 init_one_comp_unit (&cu
, this_cu
);
4472 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
4474 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4475 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
4476 abbrev_section
, info_ptr
,
4477 this_cu
->is_debug_types
);
4479 this_cu
->length
= get_cu_length (&cu
.header
);
4481 /* Skip dummy compilation units. */
4482 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4483 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4485 do_cleanups (cleanups
);
4489 dwarf2_read_abbrevs (&cu
, abbrev_section
);
4490 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
4492 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
4493 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4495 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4497 do_cleanups (cleanups
);
4500 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4501 does not lookup the specified DWO file.
4502 This cannot be used to read DWO files.
4504 THIS_CU->cu is always freed when done.
4505 This is done in order to not leave THIS_CU->cu in a state where we have
4506 to care whether it refers to the "main" CU or the DWO CU.
4507 We can revisit this if the data shows there's a performance issue. */
4510 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
4511 die_reader_func_ftype
*die_reader_func
,
4514 init_cutu_and_read_dies_no_follow (this_cu
,
4515 &dwarf2_per_objfile
->abbrev
,
4517 die_reader_func
, data
);
4520 /* Create a psymtab named NAME and assign it to PER_CU.
4522 The caller must fill in the following details:
4523 dirname, textlow, texthigh. */
4525 static struct partial_symtab
*
4526 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
4528 struct objfile
*objfile
= per_cu
->objfile
;
4529 struct partial_symtab
*pst
;
4531 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
4533 objfile
->global_psymbols
.next
,
4534 objfile
->static_psymbols
.next
);
4536 pst
->psymtabs_addrmap_supported
= 1;
4538 /* This is the glue that links PST into GDB's symbol API. */
4539 pst
->read_symtab_private
= per_cu
;
4540 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
4541 per_cu
->v
.psymtab
= pst
;
4546 /* die_reader_func for process_psymtab_comp_unit. */
4549 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
4551 struct die_info
*comp_unit_die
,
4555 struct dwarf2_cu
*cu
= reader
->cu
;
4556 struct objfile
*objfile
= cu
->objfile
;
4557 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
4558 struct attribute
*attr
;
4560 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
4561 struct partial_symtab
*pst
;
4563 const char *filename
;
4564 int *want_partial_unit_ptr
= data
;
4566 if (comp_unit_die
->tag
== DW_TAG_partial_unit
4567 && (want_partial_unit_ptr
== NULL
4568 || !*want_partial_unit_ptr
))
4571 gdb_assert (! per_cu
->is_debug_types
);
4573 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4575 cu
->list_in_scope
= &file_symbols
;
4577 /* Allocate a new partial symbol table structure. */
4578 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
4579 if (attr
== NULL
|| !DW_STRING (attr
))
4582 filename
= DW_STRING (attr
);
4584 pst
= create_partial_symtab (per_cu
, filename
);
4586 /* This must be done before calling dwarf2_build_include_psymtabs. */
4587 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4589 pst
->dirname
= DW_STRING (attr
);
4591 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4593 dwarf2_find_base_address (comp_unit_die
, cu
);
4595 /* Possibly set the default values of LOWPC and HIGHPC from
4597 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
4598 &best_highpc
, cu
, pst
);
4599 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
4600 /* Store the contiguous range if it is not empty; it can be empty for
4601 CUs with no code. */
4602 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4603 best_lowpc
+ baseaddr
,
4604 best_highpc
+ baseaddr
- 1, pst
);
4606 /* Check if comp unit has_children.
4607 If so, read the rest of the partial symbols from this comp unit.
4608 If not, there's no more debug_info for this comp unit. */
4611 struct partial_die_info
*first_die
;
4612 CORE_ADDR lowpc
, highpc
;
4614 lowpc
= ((CORE_ADDR
) -1);
4615 highpc
= ((CORE_ADDR
) 0);
4617 first_die
= load_partial_dies (reader
, info_ptr
, 1);
4619 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
4622 /* If we didn't find a lowpc, set it to highpc to avoid
4623 complaints from `maint check'. */
4624 if (lowpc
== ((CORE_ADDR
) -1))
4627 /* If the compilation unit didn't have an explicit address range,
4628 then use the information extracted from its child dies. */
4632 best_highpc
= highpc
;
4635 pst
->textlow
= best_lowpc
+ baseaddr
;
4636 pst
->texthigh
= best_highpc
+ baseaddr
;
4638 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
4639 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
4640 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
4641 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
4642 sort_pst_symbols (pst
);
4644 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
))
4647 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
);
4648 struct dwarf2_per_cu_data
*iter
;
4650 /* Fill in 'dependencies' here; we fill in 'users' in a
4652 pst
->number_of_dependencies
= len
;
4653 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
4654 len
* sizeof (struct symtab
*));
4656 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
4659 pst
->dependencies
[i
] = iter
->v
.psymtab
;
4661 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
);
4664 /* Get the list of files included in the current compilation unit,
4665 and build a psymtab for each of them. */
4666 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
4668 if (dwarf2_read_debug
)
4670 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4672 fprintf_unfiltered (gdb_stdlog
,
4673 "Psymtab for %s unit @0x%x: 0x%s - 0x%s"
4674 ", %d global, %d static syms\n",
4675 per_cu
->is_debug_types
? "type" : "comp",
4676 per_cu
->offset
.sect_off
,
4677 paddress (gdbarch
, pst
->textlow
),
4678 paddress (gdbarch
, pst
->texthigh
),
4679 pst
->n_global_syms
, pst
->n_static_syms
);
4683 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
4684 Process compilation unit THIS_CU for a psymtab. */
4687 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
4688 int want_partial_unit
)
4690 /* If this compilation unit was already read in, free the
4691 cached copy in order to read it in again. This is
4692 necessary because we skipped some symbols when we first
4693 read in the compilation unit (see load_partial_dies).
4694 This problem could be avoided, but the benefit is unclear. */
4695 if (this_cu
->cu
!= NULL
)
4696 free_one_cached_comp_unit (this_cu
);
4698 gdb_assert (! this_cu
->is_debug_types
);
4699 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
4700 process_psymtab_comp_unit_reader
,
4701 &want_partial_unit
);
4703 /* Age out any secondary CUs. */
4704 age_cached_comp_units ();
4708 hash_type_unit_group (const void *item
)
4710 const struct type_unit_group
*symtab
= item
;
4712 return symtab
->line_offset
.sect_off
;
4716 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
4718 const struct type_unit_group
*lhs
= item_lhs
;
4719 const struct type_unit_group
*rhs
= item_rhs
;
4721 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
4724 /* Allocate a hash table for type unit groups. */
4727 allocate_type_unit_groups_table (void)
4729 return htab_create_alloc_ex (3,
4730 hash_type_unit_group
,
4733 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
4734 hashtab_obstack_allocate
,
4735 dummy_obstack_deallocate
);
4738 /* Type units that don't have DW_AT_stmt_list are grouped into their own
4739 partial symtabs. We combine several TUs per psymtab to not let the size
4740 of any one psymtab grow too big. */
4741 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
4742 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
4744 /* Helper routine for build_type_psymtabs_reader.
4745 Create the type_unit_group object used to hold one or more TUs. */
4747 static struct type_unit_group
*
4748 create_type_unit_group (struct dwarf2_per_cu_data
*per_cu
,
4749 sect_offset line_offset_struct
)
4751 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4752 struct type_unit_group
*tu_group
;
4753 struct partial_symtab
*pst
;
4754 unsigned int line_offset
;
4757 line_offset
= line_offset_struct
.sect_off
;
4759 /* Give the symtab a useful name for debug purposes. */
4760 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
4761 name
= xstrprintf ("<type_units_%d>",
4762 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
4764 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
4766 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4767 struct type_unit_group
);
4769 per_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4770 struct dwarf2_per_cu_data
);
4771 per_cu
->objfile
= objfile
;
4772 per_cu
->is_debug_types
= 1;
4773 per_cu
->s
.type_unit_group
= tu_group
;
4775 pst
= create_partial_symtab (per_cu
, name
);
4780 tu_group
->per_cu
= per_cu
;
4781 tu_group
->line_offset
.sect_off
= line_offset
;
4786 /* Look up the type_unit_group for PER_CU, and create it if necessary.
4787 STMT_LIST is an DW_AT_stmt_list attribute. */
4789 static struct type_unit_group
*
4790 get_type_unit_group (struct dwarf2_per_cu_data
*per_cu
,
4791 struct attribute
*stmt_list
)
4793 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
4794 struct type_unit_group
*tu_group
;
4796 unsigned int line_offset
;
4797 struct type_unit_group type_unit_group_for_lookup
;
4799 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
4801 dwarf2_per_objfile
->type_unit_groups
=
4802 allocate_type_unit_groups_table ();
4805 /* Do we need to create a new group, or can we use an existing one? */
4809 line_offset
= DW_UNSND (stmt_list
);
4810 ++tu_stats
->nr_symtab_sharers
;
4814 /* Ugh, no stmt_list. Rare, but we have to handle it.
4815 We can do various things here like create one group per TU or
4816 spread them over multiple groups to split up the expansion work.
4817 To avoid worst case scenarios (too many groups or too large groups)
4818 we, umm, group them in bunches. */
4819 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
4820 | (tu_stats
->nr_stmt_less_type_units
4821 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
4822 ++tu_stats
->nr_stmt_less_type_units
;
4825 type_unit_group_for_lookup
.line_offset
.sect_off
= line_offset
;
4826 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
4827 &type_unit_group_for_lookup
, INSERT
);
4831 gdb_assert (tu_group
!= NULL
);
4835 sect_offset line_offset_struct
;
4837 line_offset_struct
.sect_off
= line_offset
;
4838 tu_group
= create_type_unit_group (per_cu
, line_offset_struct
);
4840 ++tu_stats
->nr_symtabs
;
4846 /* Struct used to sort TUs by their abbreviation table offset. */
4848 struct tu_abbrev_offset
4850 struct signatured_type
*sig_type
;
4851 sect_offset abbrev_offset
;
4854 /* Helper routine for build_type_unit_groups, passed to qsort. */
4857 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
4859 const struct tu_abbrev_offset
* const *a
= ap
;
4860 const struct tu_abbrev_offset
* const *b
= bp
;
4861 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
4862 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
4864 return (aoff
> boff
) - (aoff
< boff
);
4867 /* A helper function to add a type_unit_group to a table. */
4870 add_type_unit_group_to_table (void **slot
, void *datum
)
4872 struct type_unit_group
*tu_group
= *slot
;
4873 struct type_unit_group
***datap
= datum
;
4881 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
4882 each one passing FUNC,DATA.
4884 The efficiency is because we sort TUs by the abbrev table they use and
4885 only read each abbrev table once. In one program there are 200K TUs
4886 sharing 8K abbrev tables.
4888 The main purpose of this function is to support building the
4889 dwarf2_per_objfile->type_unit_groups table.
4890 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
4891 can collapse the search space by grouping them by stmt_list.
4892 The savings can be significant, in the same program from above the 200K TUs
4893 share 8K stmt_list tables.
4895 FUNC is expected to call get_type_unit_group, which will create the
4896 struct type_unit_group if necessary and add it to
4897 dwarf2_per_objfile->type_unit_groups. */
4900 build_type_unit_groups (die_reader_func_ftype
*func
, void *data
)
4902 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4903 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
4904 struct cleanup
*cleanups
;
4905 struct abbrev_table
*abbrev_table
;
4906 sect_offset abbrev_offset
;
4907 struct tu_abbrev_offset
*sorted_by_abbrev
;
4908 struct type_unit_group
**iter
;
4911 /* It's up to the caller to not call us multiple times. */
4912 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
4914 if (dwarf2_per_objfile
->n_type_units
== 0)
4917 /* TUs typically share abbrev tables, and there can be way more TUs than
4918 abbrev tables. Sort by abbrev table to reduce the number of times we
4919 read each abbrev table in.
4920 Alternatives are to punt or to maintain a cache of abbrev tables.
4921 This is simpler and efficient enough for now.
4923 Later we group TUs by their DW_AT_stmt_list value (as this defines the
4924 symtab to use). Typically TUs with the same abbrev offset have the same
4925 stmt_list value too so in practice this should work well.
4927 The basic algorithm here is:
4929 sort TUs by abbrev table
4930 for each TU with same abbrev table:
4931 read abbrev table if first user
4932 read TU top level DIE
4933 [IWBN if DWO skeletons had DW_AT_stmt_list]
4936 if (dwarf2_read_debug
)
4937 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
4939 /* Sort in a separate table to maintain the order of all_type_units
4940 for .gdb_index: TU indices directly index all_type_units. */
4941 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
4942 dwarf2_per_objfile
->n_type_units
);
4943 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
4945 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
4947 sorted_by_abbrev
[i
].sig_type
= sig_type
;
4948 sorted_by_abbrev
[i
].abbrev_offset
=
4949 read_abbrev_offset (sig_type
->per_cu
.info_or_types_section
,
4950 sig_type
->per_cu
.offset
);
4952 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
4953 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
4954 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
4956 memset (tu_stats
, 0, sizeof (*tu_stats
));
4957 abbrev_offset
.sect_off
= ~(unsigned) 0;
4958 abbrev_table
= NULL
;
4959 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
4961 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
4963 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
4965 /* Switch to the next abbrev table if necessary. */
4966 if (abbrev_table
== NULL
4967 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
4969 if (abbrev_table
!= NULL
)
4971 abbrev_table_free (abbrev_table
);
4972 /* Reset to NULL in case abbrev_table_read_table throws
4973 an error: abbrev_table_free_cleanup will get called. */
4974 abbrev_table
= NULL
;
4976 abbrev_offset
= tu
->abbrev_offset
;
4978 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
4980 ++tu_stats
->nr_uniq_abbrev_tables
;
4983 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
4987 /* Create a vector of pointers to primary type units to make it easy to
4988 iterate over them and CUs. See dw2_get_primary_cu. */
4989 dwarf2_per_objfile
->n_type_unit_groups
=
4990 htab_elements (dwarf2_per_objfile
->type_unit_groups
);
4991 dwarf2_per_objfile
->all_type_unit_groups
=
4992 obstack_alloc (&objfile
->objfile_obstack
,
4993 dwarf2_per_objfile
->n_type_unit_groups
4994 * sizeof (struct type_unit_group
*));
4995 iter
= &dwarf2_per_objfile
->all_type_unit_groups
[0];
4996 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
4997 add_type_unit_group_to_table
, &iter
);
4998 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_unit_groups
[0]
4999 == dwarf2_per_objfile
->n_type_unit_groups
);
5001 do_cleanups (cleanups
);
5003 if (dwarf2_read_debug
)
5005 fprintf_unfiltered (gdb_stdlog
, "Done building type unit groups:\n");
5006 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
5007 dwarf2_per_objfile
->n_type_units
);
5008 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
5009 tu_stats
->nr_uniq_abbrev_tables
);
5010 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
5011 tu_stats
->nr_symtabs
);
5012 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
5013 tu_stats
->nr_symtab_sharers
);
5014 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
5015 tu_stats
->nr_stmt_less_type_units
);
5019 /* Reader function for build_type_psymtabs. */
5022 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
5024 struct die_info
*type_unit_die
,
5028 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5029 struct dwarf2_cu
*cu
= reader
->cu
;
5030 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5031 struct type_unit_group
*tu_group
;
5032 struct attribute
*attr
;
5033 struct partial_die_info
*first_die
;
5034 CORE_ADDR lowpc
, highpc
;
5035 struct partial_symtab
*pst
;
5037 gdb_assert (data
== NULL
);
5042 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
5043 tu_group
= get_type_unit_group (per_cu
, attr
);
5045 VEC_safe_push (dwarf2_per_cu_ptr
, tu_group
->tus
, per_cu
);
5047 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
5048 cu
->list_in_scope
= &file_symbols
;
5049 pst
= create_partial_symtab (per_cu
, "");
5052 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5054 lowpc
= (CORE_ADDR
) -1;
5055 highpc
= (CORE_ADDR
) 0;
5056 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
5058 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5059 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5060 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5061 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5062 sort_pst_symbols (pst
);
5065 /* Traversal function for build_type_psymtabs. */
5068 build_type_psymtab_dependencies (void **slot
, void *info
)
5070 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5071 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
5072 struct dwarf2_per_cu_data
*per_cu
= tu_group
->per_cu
;
5073 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5074 int len
= VEC_length (dwarf2_per_cu_ptr
, tu_group
->tus
);
5075 struct dwarf2_per_cu_data
*iter
;
5078 gdb_assert (len
> 0);
5080 pst
->number_of_dependencies
= len
;
5081 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5082 len
* sizeof (struct psymtab
*));
5084 VEC_iterate (dwarf2_per_cu_ptr
, tu_group
->tus
, i
, iter
);
5087 pst
->dependencies
[i
] = iter
->v
.psymtab
;
5088 iter
->s
.type_unit_group
= tu_group
;
5091 VEC_free (dwarf2_per_cu_ptr
, tu_group
->tus
);
5096 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5097 Build partial symbol tables for the .debug_types comp-units. */
5100 build_type_psymtabs (struct objfile
*objfile
)
5102 if (! create_all_type_units (objfile
))
5105 build_type_unit_groups (build_type_psymtabs_reader
, NULL
);
5107 /* Now that all TUs have been processed we can fill in the dependencies. */
5108 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5109 build_type_psymtab_dependencies
, NULL
);
5112 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
5115 psymtabs_addrmap_cleanup (void *o
)
5117 struct objfile
*objfile
= o
;
5119 objfile
->psymtabs_addrmap
= NULL
;
5122 /* Compute the 'user' field for each psymtab in OBJFILE. */
5125 set_partial_user (struct objfile
*objfile
)
5129 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5131 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5132 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5135 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
5137 /* Set the 'user' field only if it is not already set. */
5138 if (pst
->dependencies
[j
]->user
== NULL
)
5139 pst
->dependencies
[j
]->user
= pst
;
5144 /* Build the partial symbol table by doing a quick pass through the
5145 .debug_info and .debug_abbrev sections. */
5148 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
5150 struct cleanup
*back_to
, *addrmap_cleanup
;
5151 struct obstack temp_obstack
;
5154 if (dwarf2_read_debug
)
5156 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
5160 dwarf2_per_objfile
->reading_partial_symbols
= 1;
5162 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
5164 /* Any cached compilation units will be linked by the per-objfile
5165 read_in_chain. Make sure to free them when we're done. */
5166 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
5168 build_type_psymtabs (objfile
);
5170 create_all_comp_units (objfile
);
5172 /* Create a temporary address map on a temporary obstack. We later
5173 copy this to the final obstack. */
5174 obstack_init (&temp_obstack
);
5175 make_cleanup_obstack_free (&temp_obstack
);
5176 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
5177 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
5179 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5181 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5183 process_psymtab_comp_unit (per_cu
, 0);
5186 set_partial_user (objfile
);
5188 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
5189 &objfile
->objfile_obstack
);
5190 discard_cleanups (addrmap_cleanup
);
5192 do_cleanups (back_to
);
5194 if (dwarf2_read_debug
)
5195 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
5199 /* die_reader_func for load_partial_comp_unit. */
5202 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
5204 struct die_info
*comp_unit_die
,
5208 struct dwarf2_cu
*cu
= reader
->cu
;
5210 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
5212 /* Check if comp unit has_children.
5213 If so, read the rest of the partial symbols from this comp unit.
5214 If not, there's no more debug_info for this comp unit. */
5216 load_partial_dies (reader
, info_ptr
, 0);
5219 /* Load the partial DIEs for a secondary CU into memory.
5220 This is also used when rereading a primary CU with load_all_dies. */
5223 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
5225 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
5226 load_partial_comp_unit_reader
, NULL
);
5229 /* Create a list of all compilation units in OBJFILE.
5230 This is only done for -readnow and building partial symtabs. */
5233 create_all_comp_units (struct objfile
*objfile
)
5237 struct dwarf2_per_cu_data
**all_comp_units
;
5240 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
5241 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
5245 all_comp_units
= xmalloc (n_allocated
5246 * sizeof (struct dwarf2_per_cu_data
*));
5248 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
5249 + dwarf2_per_objfile
->info
.size
)
5251 unsigned int length
, initial_length_size
;
5252 struct dwarf2_per_cu_data
*this_cu
;
5255 offset
.sect_off
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
5257 /* Read just enough information to find out where the next
5258 compilation unit is. */
5259 length
= read_initial_length (objfile
->obfd
, info_ptr
,
5260 &initial_length_size
);
5262 /* Save the compilation unit for later lookup. */
5263 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
5264 sizeof (struct dwarf2_per_cu_data
));
5265 memset (this_cu
, 0, sizeof (*this_cu
));
5266 this_cu
->offset
= offset
;
5267 this_cu
->length
= length
+ initial_length_size
;
5268 this_cu
->objfile
= objfile
;
5269 this_cu
->info_or_types_section
= &dwarf2_per_objfile
->info
;
5271 if (n_comp_units
== n_allocated
)
5274 all_comp_units
= xrealloc (all_comp_units
,
5276 * sizeof (struct dwarf2_per_cu_data
*));
5278 all_comp_units
[n_comp_units
++] = this_cu
;
5280 info_ptr
= info_ptr
+ this_cu
->length
;
5283 dwarf2_per_objfile
->all_comp_units
5284 = obstack_alloc (&objfile
->objfile_obstack
,
5285 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5286 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
5287 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5288 xfree (all_comp_units
);
5289 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
5292 /* Process all loaded DIEs for compilation unit CU, starting at
5293 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
5294 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
5295 DW_AT_ranges). If NEED_PC is set, then this function will set
5296 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
5297 and record the covered ranges in the addrmap. */
5300 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
5301 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
5303 struct partial_die_info
*pdi
;
5305 /* Now, march along the PDI's, descending into ones which have
5306 interesting children but skipping the children of the other ones,
5307 until we reach the end of the compilation unit. */
5313 fixup_partial_die (pdi
, cu
);
5315 /* Anonymous namespaces or modules have no name but have interesting
5316 children, so we need to look at them. Ditto for anonymous
5319 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
5320 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
5321 || pdi
->tag
== DW_TAG_imported_unit
)
5325 case DW_TAG_subprogram
:
5326 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
5328 case DW_TAG_constant
:
5329 case DW_TAG_variable
:
5330 case DW_TAG_typedef
:
5331 case DW_TAG_union_type
:
5332 if (!pdi
->is_declaration
)
5334 add_partial_symbol (pdi
, cu
);
5337 case DW_TAG_class_type
:
5338 case DW_TAG_interface_type
:
5339 case DW_TAG_structure_type
:
5340 if (!pdi
->is_declaration
)
5342 add_partial_symbol (pdi
, cu
);
5345 case DW_TAG_enumeration_type
:
5346 if (!pdi
->is_declaration
)
5347 add_partial_enumeration (pdi
, cu
);
5349 case DW_TAG_base_type
:
5350 case DW_TAG_subrange_type
:
5351 /* File scope base type definitions are added to the partial
5353 add_partial_symbol (pdi
, cu
);
5355 case DW_TAG_namespace
:
5356 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
5359 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
5361 case DW_TAG_imported_unit
:
5363 struct dwarf2_per_cu_data
*per_cu
;
5365 /* For now we don't handle imported units in type units. */
5366 if (cu
->per_cu
->is_debug_types
)
5368 error (_("Dwarf Error: DW_TAG_imported_unit is not"
5369 " supported in type units [in module %s]"),
5373 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
5376 /* Go read the partial unit, if needed. */
5377 if (per_cu
->v
.psymtab
== NULL
)
5378 process_psymtab_comp_unit (per_cu
, 1);
5380 VEC_safe_push (dwarf2_per_cu_ptr
,
5381 cu
->per_cu
->s
.imported_symtabs
, per_cu
);
5389 /* If the die has a sibling, skip to the sibling. */
5391 pdi
= pdi
->die_sibling
;
5395 /* Functions used to compute the fully scoped name of a partial DIE.
5397 Normally, this is simple. For C++, the parent DIE's fully scoped
5398 name is concatenated with "::" and the partial DIE's name. For
5399 Java, the same thing occurs except that "." is used instead of "::".
5400 Enumerators are an exception; they use the scope of their parent
5401 enumeration type, i.e. the name of the enumeration type is not
5402 prepended to the enumerator.
5404 There are two complexities. One is DW_AT_specification; in this
5405 case "parent" means the parent of the target of the specification,
5406 instead of the direct parent of the DIE. The other is compilers
5407 which do not emit DW_TAG_namespace; in this case we try to guess
5408 the fully qualified name of structure types from their members'
5409 linkage names. This must be done using the DIE's children rather
5410 than the children of any DW_AT_specification target. We only need
5411 to do this for structures at the top level, i.e. if the target of
5412 any DW_AT_specification (if any; otherwise the DIE itself) does not
5415 /* Compute the scope prefix associated with PDI's parent, in
5416 compilation unit CU. The result will be allocated on CU's
5417 comp_unit_obstack, or a copy of the already allocated PDI->NAME
5418 field. NULL is returned if no prefix is necessary. */
5420 partial_die_parent_scope (struct partial_die_info
*pdi
,
5421 struct dwarf2_cu
*cu
)
5423 char *grandparent_scope
;
5424 struct partial_die_info
*parent
, *real_pdi
;
5426 /* We need to look at our parent DIE; if we have a DW_AT_specification,
5427 then this means the parent of the specification DIE. */
5430 while (real_pdi
->has_specification
)
5431 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
5433 parent
= real_pdi
->die_parent
;
5437 if (parent
->scope_set
)
5438 return parent
->scope
;
5440 fixup_partial_die (parent
, cu
);
5442 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
5444 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
5445 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
5446 Work around this problem here. */
5447 if (cu
->language
== language_cplus
5448 && parent
->tag
== DW_TAG_namespace
5449 && strcmp (parent
->name
, "::") == 0
5450 && grandparent_scope
== NULL
)
5452 parent
->scope
= NULL
;
5453 parent
->scope_set
= 1;
5457 if (pdi
->tag
== DW_TAG_enumerator
)
5458 /* Enumerators should not get the name of the enumeration as a prefix. */
5459 parent
->scope
= grandparent_scope
;
5460 else if (parent
->tag
== DW_TAG_namespace
5461 || parent
->tag
== DW_TAG_module
5462 || parent
->tag
== DW_TAG_structure_type
5463 || parent
->tag
== DW_TAG_class_type
5464 || parent
->tag
== DW_TAG_interface_type
5465 || parent
->tag
== DW_TAG_union_type
5466 || parent
->tag
== DW_TAG_enumeration_type
)
5468 if (grandparent_scope
== NULL
)
5469 parent
->scope
= parent
->name
;
5471 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
5473 parent
->name
, 0, cu
);
5477 /* FIXME drow/2004-04-01: What should we be doing with
5478 function-local names? For partial symbols, we should probably be
5480 complaint (&symfile_complaints
,
5481 _("unhandled containing DIE tag %d for DIE at %d"),
5482 parent
->tag
, pdi
->offset
.sect_off
);
5483 parent
->scope
= grandparent_scope
;
5486 parent
->scope_set
= 1;
5487 return parent
->scope
;
5490 /* Return the fully scoped name associated with PDI, from compilation unit
5491 CU. The result will be allocated with malloc. */
5494 partial_die_full_name (struct partial_die_info
*pdi
,
5495 struct dwarf2_cu
*cu
)
5499 /* If this is a template instantiation, we can not work out the
5500 template arguments from partial DIEs. So, unfortunately, we have
5501 to go through the full DIEs. At least any work we do building
5502 types here will be reused if full symbols are loaded later. */
5503 if (pdi
->has_template_arguments
)
5505 fixup_partial_die (pdi
, cu
);
5507 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
5509 struct die_info
*die
;
5510 struct attribute attr
;
5511 struct dwarf2_cu
*ref_cu
= cu
;
5513 /* DW_FORM_ref_addr is using section offset. */
5515 attr
.form
= DW_FORM_ref_addr
;
5516 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
5517 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
5519 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
5523 parent_scope
= partial_die_parent_scope (pdi
, cu
);
5524 if (parent_scope
== NULL
)
5527 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
5531 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
5533 struct objfile
*objfile
= cu
->objfile
;
5535 char *actual_name
= NULL
;
5537 int built_actual_name
= 0;
5539 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5541 actual_name
= partial_die_full_name (pdi
, cu
);
5543 built_actual_name
= 1;
5545 if (actual_name
== NULL
)
5546 actual_name
= pdi
->name
;
5550 case DW_TAG_subprogram
:
5551 if (pdi
->is_external
|| cu
->language
== language_ada
)
5553 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
5554 of the global scope. But in Ada, we want to be able to access
5555 nested procedures globally. So all Ada subprograms are stored
5556 in the global scope. */
5557 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5558 mst_text, objfile); */
5559 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5561 VAR_DOMAIN
, LOC_BLOCK
,
5562 &objfile
->global_psymbols
,
5563 0, pdi
->lowpc
+ baseaddr
,
5564 cu
->language
, objfile
);
5568 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5569 mst_file_text, objfile); */
5570 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5572 VAR_DOMAIN
, LOC_BLOCK
,
5573 &objfile
->static_psymbols
,
5574 0, pdi
->lowpc
+ baseaddr
,
5575 cu
->language
, objfile
);
5578 case DW_TAG_constant
:
5580 struct psymbol_allocation_list
*list
;
5582 if (pdi
->is_external
)
5583 list
= &objfile
->global_psymbols
;
5585 list
= &objfile
->static_psymbols
;
5586 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5587 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
5588 list
, 0, 0, cu
->language
, objfile
);
5591 case DW_TAG_variable
:
5593 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
5597 && !dwarf2_per_objfile
->has_section_at_zero
)
5599 /* A global or static variable may also have been stripped
5600 out by the linker if unused, in which case its address
5601 will be nullified; do not add such variables into partial
5602 symbol table then. */
5604 else if (pdi
->is_external
)
5607 Don't enter into the minimal symbol tables as there is
5608 a minimal symbol table entry from the ELF symbols already.
5609 Enter into partial symbol table if it has a location
5610 descriptor or a type.
5611 If the location descriptor is missing, new_symbol will create
5612 a LOC_UNRESOLVED symbol, the address of the variable will then
5613 be determined from the minimal symbol table whenever the variable
5615 The address for the partial symbol table entry is not
5616 used by GDB, but it comes in handy for debugging partial symbol
5619 if (pdi
->d
.locdesc
|| pdi
->has_type
)
5620 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5622 VAR_DOMAIN
, LOC_STATIC
,
5623 &objfile
->global_psymbols
,
5625 cu
->language
, objfile
);
5629 /* Static Variable. Skip symbols without location descriptors. */
5630 if (pdi
->d
.locdesc
== NULL
)
5632 if (built_actual_name
)
5633 xfree (actual_name
);
5636 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
5637 mst_file_data, objfile); */
5638 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5640 VAR_DOMAIN
, LOC_STATIC
,
5641 &objfile
->static_psymbols
,
5643 cu
->language
, objfile
);
5646 case DW_TAG_typedef
:
5647 case DW_TAG_base_type
:
5648 case DW_TAG_subrange_type
:
5649 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5651 VAR_DOMAIN
, LOC_TYPEDEF
,
5652 &objfile
->static_psymbols
,
5653 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5655 case DW_TAG_namespace
:
5656 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5658 VAR_DOMAIN
, LOC_TYPEDEF
,
5659 &objfile
->global_psymbols
,
5660 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5662 case DW_TAG_class_type
:
5663 case DW_TAG_interface_type
:
5664 case DW_TAG_structure_type
:
5665 case DW_TAG_union_type
:
5666 case DW_TAG_enumeration_type
:
5667 /* Skip external references. The DWARF standard says in the section
5668 about "Structure, Union, and Class Type Entries": "An incomplete
5669 structure, union or class type is represented by a structure,
5670 union or class entry that does not have a byte size attribute
5671 and that has a DW_AT_declaration attribute." */
5672 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
5674 if (built_actual_name
)
5675 xfree (actual_name
);
5679 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
5680 static vs. global. */
5681 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5683 STRUCT_DOMAIN
, LOC_TYPEDEF
,
5684 (cu
->language
== language_cplus
5685 || cu
->language
== language_java
)
5686 ? &objfile
->global_psymbols
5687 : &objfile
->static_psymbols
,
5688 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5691 case DW_TAG_enumerator
:
5692 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5694 VAR_DOMAIN
, LOC_CONST
,
5695 (cu
->language
== language_cplus
5696 || cu
->language
== language_java
)
5697 ? &objfile
->global_psymbols
5698 : &objfile
->static_psymbols
,
5699 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5705 if (built_actual_name
)
5706 xfree (actual_name
);
5709 /* Read a partial die corresponding to a namespace; also, add a symbol
5710 corresponding to that namespace to the symbol table. NAMESPACE is
5711 the name of the enclosing namespace. */
5714 add_partial_namespace (struct partial_die_info
*pdi
,
5715 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5716 int need_pc
, struct dwarf2_cu
*cu
)
5718 /* Add a symbol for the namespace. */
5720 add_partial_symbol (pdi
, cu
);
5722 /* Now scan partial symbols in that namespace. */
5724 if (pdi
->has_children
)
5725 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
5728 /* Read a partial die corresponding to a Fortran module. */
5731 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
5732 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
5734 /* Now scan partial symbols in that module. */
5736 if (pdi
->has_children
)
5737 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
5740 /* Read a partial die corresponding to a subprogram and create a partial
5741 symbol for that subprogram. When the CU language allows it, this
5742 routine also defines a partial symbol for each nested subprogram
5743 that this subprogram contains.
5745 DIE my also be a lexical block, in which case we simply search
5746 recursively for suprograms defined inside that lexical block.
5747 Again, this is only performed when the CU language allows this
5748 type of definitions. */
5751 add_partial_subprogram (struct partial_die_info
*pdi
,
5752 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5753 int need_pc
, struct dwarf2_cu
*cu
)
5755 if (pdi
->tag
== DW_TAG_subprogram
)
5757 if (pdi
->has_pc_info
)
5759 if (pdi
->lowpc
< *lowpc
)
5760 *lowpc
= pdi
->lowpc
;
5761 if (pdi
->highpc
> *highpc
)
5762 *highpc
= pdi
->highpc
;
5766 struct objfile
*objfile
= cu
->objfile
;
5768 baseaddr
= ANOFFSET (objfile
->section_offsets
,
5769 SECT_OFF_TEXT (objfile
));
5770 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5771 pdi
->lowpc
+ baseaddr
,
5772 pdi
->highpc
- 1 + baseaddr
,
5773 cu
->per_cu
->v
.psymtab
);
5777 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
5779 if (!pdi
->is_declaration
)
5780 /* Ignore subprogram DIEs that do not have a name, they are
5781 illegal. Do not emit a complaint at this point, we will
5782 do so when we convert this psymtab into a symtab. */
5784 add_partial_symbol (pdi
, cu
);
5788 if (! pdi
->has_children
)
5791 if (cu
->language
== language_ada
)
5793 pdi
= pdi
->die_child
;
5796 fixup_partial_die (pdi
, cu
);
5797 if (pdi
->tag
== DW_TAG_subprogram
5798 || pdi
->tag
== DW_TAG_lexical_block
)
5799 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
5800 pdi
= pdi
->die_sibling
;
5805 /* Read a partial die corresponding to an enumeration type. */
5808 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
5809 struct dwarf2_cu
*cu
)
5811 struct partial_die_info
*pdi
;
5813 if (enum_pdi
->name
!= NULL
)
5814 add_partial_symbol (enum_pdi
, cu
);
5816 pdi
= enum_pdi
->die_child
;
5819 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
5820 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
5822 add_partial_symbol (pdi
, cu
);
5823 pdi
= pdi
->die_sibling
;
5827 /* Return the initial uleb128 in the die at INFO_PTR. */
5830 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
5832 unsigned int bytes_read
;
5834 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5837 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
5838 Return the corresponding abbrev, or NULL if the number is zero (indicating
5839 an empty DIE). In either case *BYTES_READ will be set to the length of
5840 the initial number. */
5842 static struct abbrev_info
*
5843 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
5844 struct dwarf2_cu
*cu
)
5846 bfd
*abfd
= cu
->objfile
->obfd
;
5847 unsigned int abbrev_number
;
5848 struct abbrev_info
*abbrev
;
5850 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
5852 if (abbrev_number
== 0)
5855 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
5858 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
5859 abbrev_number
, bfd_get_filename (abfd
));
5865 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
5866 Returns a pointer to the end of a series of DIEs, terminated by an empty
5867 DIE. Any children of the skipped DIEs will also be skipped. */
5870 skip_children (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
)
5872 struct dwarf2_cu
*cu
= reader
->cu
;
5873 struct abbrev_info
*abbrev
;
5874 unsigned int bytes_read
;
5878 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
5880 return info_ptr
+ bytes_read
;
5882 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
5886 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
5887 INFO_PTR should point just after the initial uleb128 of a DIE, and the
5888 abbrev corresponding to that skipped uleb128 should be passed in
5889 ABBREV. Returns a pointer to this DIE's sibling, skipping any
5893 skip_one_die (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
,
5894 struct abbrev_info
*abbrev
)
5896 unsigned int bytes_read
;
5897 struct attribute attr
;
5898 bfd
*abfd
= reader
->abfd
;
5899 struct dwarf2_cu
*cu
= reader
->cu
;
5900 gdb_byte
*buffer
= reader
->buffer
;
5901 const gdb_byte
*buffer_end
= reader
->buffer_end
;
5902 gdb_byte
*start_info_ptr
= info_ptr
;
5903 unsigned int form
, i
;
5905 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
5907 /* The only abbrev we care about is DW_AT_sibling. */
5908 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
5910 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
5911 if (attr
.form
== DW_FORM_ref_addr
)
5912 complaint (&symfile_complaints
,
5913 _("ignoring absolute DW_AT_sibling"));
5915 return buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
5918 /* If it isn't DW_AT_sibling, skip this attribute. */
5919 form
= abbrev
->attrs
[i
].form
;
5923 case DW_FORM_ref_addr
:
5924 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
5925 and later it is offset sized. */
5926 if (cu
->header
.version
== 2)
5927 info_ptr
+= cu
->header
.addr_size
;
5929 info_ptr
+= cu
->header
.offset_size
;
5932 info_ptr
+= cu
->header
.addr_size
;
5939 case DW_FORM_flag_present
:
5951 case DW_FORM_ref_sig8
:
5954 case DW_FORM_string
:
5955 read_direct_string (abfd
, info_ptr
, &bytes_read
);
5956 info_ptr
+= bytes_read
;
5958 case DW_FORM_sec_offset
:
5960 info_ptr
+= cu
->header
.offset_size
;
5962 case DW_FORM_exprloc
:
5964 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5965 info_ptr
+= bytes_read
;
5967 case DW_FORM_block1
:
5968 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
5970 case DW_FORM_block2
:
5971 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
5973 case DW_FORM_block4
:
5974 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
5978 case DW_FORM_ref_udata
:
5979 case DW_FORM_GNU_addr_index
:
5980 case DW_FORM_GNU_str_index
:
5981 info_ptr
= (gdb_byte
*) safe_skip_leb128 (info_ptr
, buffer_end
);
5983 case DW_FORM_indirect
:
5984 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5985 info_ptr
+= bytes_read
;
5986 /* We need to continue parsing from here, so just go back to
5988 goto skip_attribute
;
5991 error (_("Dwarf Error: Cannot handle %s "
5992 "in DWARF reader [in module %s]"),
5993 dwarf_form_name (form
),
5994 bfd_get_filename (abfd
));
5998 if (abbrev
->has_children
)
5999 return skip_children (reader
, info_ptr
);
6004 /* Locate ORIG_PDI's sibling.
6005 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
6008 locate_pdi_sibling (const struct die_reader_specs
*reader
,
6009 struct partial_die_info
*orig_pdi
,
6012 /* Do we know the sibling already? */
6014 if (orig_pdi
->sibling
)
6015 return orig_pdi
->sibling
;
6017 /* Are there any children to deal with? */
6019 if (!orig_pdi
->has_children
)
6022 /* Skip the children the long way. */
6024 return skip_children (reader
, info_ptr
);
6027 /* Expand this partial symbol table into a full symbol table. */
6030 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
6036 warning (_("bug: psymtab for %s is already read in."),
6043 printf_filtered (_("Reading in symbols for %s..."),
6045 gdb_flush (gdb_stdout
);
6048 /* Restore our global data. */
6049 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
6050 dwarf2_objfile_data_key
);
6052 /* If this psymtab is constructed from a debug-only objfile, the
6053 has_section_at_zero flag will not necessarily be correct. We
6054 can get the correct value for this flag by looking at the data
6055 associated with the (presumably stripped) associated objfile. */
6056 if (pst
->objfile
->separate_debug_objfile_backlink
)
6058 struct dwarf2_per_objfile
*dpo_backlink
6059 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
6060 dwarf2_objfile_data_key
);
6062 dwarf2_per_objfile
->has_section_at_zero
6063 = dpo_backlink
->has_section_at_zero
;
6066 dwarf2_per_objfile
->reading_partial_symbols
= 0;
6068 psymtab_to_symtab_1 (pst
);
6070 /* Finish up the debug error message. */
6072 printf_filtered (_("done.\n"));
6076 process_cu_includes ();
6079 /* Reading in full CUs. */
6081 /* Add PER_CU to the queue. */
6084 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6085 enum language pretend_language
)
6087 struct dwarf2_queue_item
*item
;
6090 item
= xmalloc (sizeof (*item
));
6091 item
->per_cu
= per_cu
;
6092 item
->pretend_language
= pretend_language
;
6095 if (dwarf2_queue
== NULL
)
6096 dwarf2_queue
= item
;
6098 dwarf2_queue_tail
->next
= item
;
6100 dwarf2_queue_tail
= item
;
6103 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
6104 unit and add it to our queue.
6105 The result is non-zero if PER_CU was queued, otherwise the result is zero
6106 meaning either PER_CU is already queued or it is already loaded. */
6109 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
6110 struct dwarf2_per_cu_data
*per_cu
,
6111 enum language pretend_language
)
6113 /* We may arrive here during partial symbol reading, if we need full
6114 DIEs to process an unusual case (e.g. template arguments). Do
6115 not queue PER_CU, just tell our caller to load its DIEs. */
6116 if (dwarf2_per_objfile
->reading_partial_symbols
)
6118 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
6123 /* Mark the dependence relation so that we don't flush PER_CU
6125 dwarf2_add_dependence (this_cu
, per_cu
);
6127 /* If it's already on the queue, we have nothing to do. */
6131 /* If the compilation unit is already loaded, just mark it as
6133 if (per_cu
->cu
!= NULL
)
6135 per_cu
->cu
->last_used
= 0;
6139 /* Add it to the queue. */
6140 queue_comp_unit (per_cu
, pretend_language
);
6145 /* Process the queue. */
6148 process_queue (void)
6150 struct dwarf2_queue_item
*item
, *next_item
;
6152 if (dwarf2_read_debug
)
6154 fprintf_unfiltered (gdb_stdlog
,
6155 "Expanding one or more symtabs of objfile %s ...\n",
6156 dwarf2_per_objfile
->objfile
->name
);
6159 /* The queue starts out with one item, but following a DIE reference
6160 may load a new CU, adding it to the end of the queue. */
6161 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
6163 if (dwarf2_per_objfile
->using_index
6164 ? !item
->per_cu
->v
.quick
->symtab
6165 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
6167 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
6169 if (dwarf2_read_debug
)
6171 fprintf_unfiltered (gdb_stdlog
,
6172 "Expanding symtab of %s at offset 0x%x\n",
6173 per_cu
->is_debug_types
? "TU" : "CU",
6174 per_cu
->offset
.sect_off
);
6177 if (per_cu
->is_debug_types
)
6178 process_full_type_unit (per_cu
, item
->pretend_language
);
6180 process_full_comp_unit (per_cu
, item
->pretend_language
);
6182 if (dwarf2_read_debug
)
6184 fprintf_unfiltered (gdb_stdlog
,
6185 "Done expanding %s at offset 0x%x\n",
6186 per_cu
->is_debug_types
? "TU" : "CU",
6187 per_cu
->offset
.sect_off
);
6191 item
->per_cu
->queued
= 0;
6192 next_item
= item
->next
;
6196 dwarf2_queue_tail
= NULL
;
6198 if (dwarf2_read_debug
)
6200 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
6201 dwarf2_per_objfile
->objfile
->name
);
6205 /* Free all allocated queue entries. This function only releases anything if
6206 an error was thrown; if the queue was processed then it would have been
6207 freed as we went along. */
6210 dwarf2_release_queue (void *dummy
)
6212 struct dwarf2_queue_item
*item
, *last
;
6214 item
= dwarf2_queue
;
6217 /* Anything still marked queued is likely to be in an
6218 inconsistent state, so discard it. */
6219 if (item
->per_cu
->queued
)
6221 if (item
->per_cu
->cu
!= NULL
)
6222 free_one_cached_comp_unit (item
->per_cu
);
6223 item
->per_cu
->queued
= 0;
6231 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
6234 /* Read in full symbols for PST, and anything it depends on. */
6237 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
6239 struct dwarf2_per_cu_data
*per_cu
;
6245 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
6246 if (!pst
->dependencies
[i
]->readin
6247 && pst
->dependencies
[i
]->user
== NULL
)
6249 /* Inform about additional files that need to be read in. */
6252 /* FIXME: i18n: Need to make this a single string. */
6253 fputs_filtered (" ", gdb_stdout
);
6255 fputs_filtered ("and ", gdb_stdout
);
6257 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
6258 wrap_here (""); /* Flush output. */
6259 gdb_flush (gdb_stdout
);
6261 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
6264 per_cu
= pst
->read_symtab_private
;
6268 /* It's an include file, no symbols to read for it.
6269 Everything is in the parent symtab. */
6274 dw2_do_instantiate_symtab (per_cu
);
6277 /* Trivial hash function for die_info: the hash value of a DIE
6278 is its offset in .debug_info for this objfile. */
6281 die_hash (const void *item
)
6283 const struct die_info
*die
= item
;
6285 return die
->offset
.sect_off
;
6288 /* Trivial comparison function for die_info structures: two DIEs
6289 are equal if they have the same offset. */
6292 die_eq (const void *item_lhs
, const void *item_rhs
)
6294 const struct die_info
*die_lhs
= item_lhs
;
6295 const struct die_info
*die_rhs
= item_rhs
;
6297 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
6300 /* die_reader_func for load_full_comp_unit.
6301 This is identical to read_signatured_type_reader,
6302 but is kept separate for now. */
6305 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
6307 struct die_info
*comp_unit_die
,
6311 struct dwarf2_cu
*cu
= reader
->cu
;
6312 enum language
*language_ptr
= data
;
6314 gdb_assert (cu
->die_hash
== NULL
);
6316 htab_create_alloc_ex (cu
->header
.length
/ 12,
6320 &cu
->comp_unit_obstack
,
6321 hashtab_obstack_allocate
,
6322 dummy_obstack_deallocate
);
6325 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
6326 &info_ptr
, comp_unit_die
);
6327 cu
->dies
= comp_unit_die
;
6328 /* comp_unit_die is not stored in die_hash, no need. */
6330 /* We try not to read any attributes in this function, because not
6331 all CUs needed for references have been loaded yet, and symbol
6332 table processing isn't initialized. But we have to set the CU language,
6333 or we won't be able to build types correctly.
6334 Similarly, if we do not read the producer, we can not apply
6335 producer-specific interpretation. */
6336 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
6339 /* Load the DIEs associated with PER_CU into memory. */
6342 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6343 enum language pretend_language
)
6345 gdb_assert (! this_cu
->is_debug_types
);
6347 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6348 load_full_comp_unit_reader
, &pretend_language
);
6351 /* Add a DIE to the delayed physname list. */
6354 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
6355 const char *name
, struct die_info
*die
,
6356 struct dwarf2_cu
*cu
)
6358 struct delayed_method_info mi
;
6360 mi
.fnfield_index
= fnfield_index
;
6364 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
6367 /* A cleanup for freeing the delayed method list. */
6370 free_delayed_list (void *ptr
)
6372 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
6373 if (cu
->method_list
!= NULL
)
6375 VEC_free (delayed_method_info
, cu
->method_list
);
6376 cu
->method_list
= NULL
;
6380 /* Compute the physnames of any methods on the CU's method list.
6382 The computation of method physnames is delayed in order to avoid the
6383 (bad) condition that one of the method's formal parameters is of an as yet
6387 compute_delayed_physnames (struct dwarf2_cu
*cu
)
6390 struct delayed_method_info
*mi
;
6391 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
6393 const char *physname
;
6394 struct fn_fieldlist
*fn_flp
6395 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
6396 physname
= dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
6397 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
6401 /* Go objects should be embedded in a DW_TAG_module DIE,
6402 and it's not clear if/how imported objects will appear.
6403 To keep Go support simple until that's worked out,
6404 go back through what we've read and create something usable.
6405 We could do this while processing each DIE, and feels kinda cleaner,
6406 but that way is more invasive.
6407 This is to, for example, allow the user to type "p var" or "b main"
6408 without having to specify the package name, and allow lookups
6409 of module.object to work in contexts that use the expression
6413 fixup_go_packaging (struct dwarf2_cu
*cu
)
6415 char *package_name
= NULL
;
6416 struct pending
*list
;
6419 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
6421 for (i
= 0; i
< list
->nsyms
; ++i
)
6423 struct symbol
*sym
= list
->symbol
[i
];
6425 if (SYMBOL_LANGUAGE (sym
) == language_go
6426 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
6428 char *this_package_name
= go_symbol_package_name (sym
);
6430 if (this_package_name
== NULL
)
6432 if (package_name
== NULL
)
6433 package_name
= this_package_name
;
6436 if (strcmp (package_name
, this_package_name
) != 0)
6437 complaint (&symfile_complaints
,
6438 _("Symtab %s has objects from two different Go packages: %s and %s"),
6439 (sym
->symtab
&& sym
->symtab
->filename
6440 ? sym
->symtab
->filename
6441 : cu
->objfile
->name
),
6442 this_package_name
, package_name
);
6443 xfree (this_package_name
);
6449 if (package_name
!= NULL
)
6451 struct objfile
*objfile
= cu
->objfile
;
6452 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
6453 package_name
, objfile
);
6456 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
6458 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6459 SYMBOL_SET_LANGUAGE (sym
, language_go
);
6460 SYMBOL_SET_NAMES (sym
, package_name
, strlen (package_name
), 1, objfile
);
6461 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
6462 e.g., "main" finds the "main" module and not C's main(). */
6463 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
6464 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
6465 SYMBOL_TYPE (sym
) = type
;
6467 add_symbol_to_list (sym
, &global_symbols
);
6469 xfree (package_name
);
6473 static void compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
);
6475 /* Return the symtab for PER_CU. This works properly regardless of
6476 whether we're using the index or psymtabs. */
6478 static struct symtab
*
6479 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
6481 return (dwarf2_per_objfile
->using_index
6482 ? per_cu
->v
.quick
->symtab
6483 : per_cu
->v
.psymtab
->symtab
);
6486 /* A helper function for computing the list of all symbol tables
6487 included by PER_CU. */
6490 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr
) **result
,
6491 htab_t all_children
,
6492 struct dwarf2_per_cu_data
*per_cu
)
6496 struct dwarf2_per_cu_data
*iter
;
6498 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
6501 /* This inclusion and its children have been processed. */
6506 /* Only add a CU if it has a symbol table. */
6507 if (get_symtab (per_cu
) != NULL
)
6508 VEC_safe_push (dwarf2_per_cu_ptr
, *result
, per_cu
);
6511 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
, ix
, iter
);
6513 recursively_compute_inclusions (result
, all_children
, iter
);
6516 /* Compute the symtab 'includes' fields for the symtab related to
6520 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
6522 gdb_assert (! per_cu
->is_debug_types
);
6524 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
))
6527 struct dwarf2_per_cu_data
*iter
;
6528 VEC (dwarf2_per_cu_ptr
) *result_children
= NULL
;
6529 htab_t all_children
;
6530 struct symtab
*symtab
= get_symtab (per_cu
);
6532 /* If we don't have a symtab, we can just skip this case. */
6536 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
6537 NULL
, xcalloc
, xfree
);
6540 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
,
6543 recursively_compute_inclusions (&result_children
, all_children
, iter
);
6545 /* Now we have a transitive closure of all the included CUs, so
6546 we can convert it to a list of symtabs. */
6547 len
= VEC_length (dwarf2_per_cu_ptr
, result_children
);
6549 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
6550 (len
+ 1) * sizeof (struct symtab
*));
6552 VEC_iterate (dwarf2_per_cu_ptr
, result_children
, ix
, iter
);
6554 symtab
->includes
[ix
] = get_symtab (iter
);
6555 symtab
->includes
[len
] = NULL
;
6557 VEC_free (dwarf2_per_cu_ptr
, result_children
);
6558 htab_delete (all_children
);
6562 /* Compute the 'includes' field for the symtabs of all the CUs we just
6566 process_cu_includes (void)
6569 struct dwarf2_per_cu_data
*iter
;
6572 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
6576 if (! iter
->is_debug_types
)
6577 compute_symtab_includes (iter
);
6580 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
6583 /* Generate full symbol information for PER_CU, whose DIEs have
6584 already been loaded into memory. */
6587 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6588 enum language pretend_language
)
6590 struct dwarf2_cu
*cu
= per_cu
->cu
;
6591 struct objfile
*objfile
= per_cu
->objfile
;
6592 CORE_ADDR lowpc
, highpc
;
6593 struct symtab
*symtab
;
6594 struct cleanup
*back_to
, *delayed_list_cleanup
;
6597 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6600 back_to
= make_cleanup (really_free_pendings
, NULL
);
6601 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
6603 cu
->list_in_scope
= &file_symbols
;
6605 cu
->language
= pretend_language
;
6606 cu
->language_defn
= language_def (cu
->language
);
6608 /* Do line number decoding in read_file_scope () */
6609 process_die (cu
->dies
, cu
);
6611 /* For now fudge the Go package. */
6612 if (cu
->language
== language_go
)
6613 fixup_go_packaging (cu
);
6615 /* Now that we have processed all the DIEs in the CU, all the types
6616 should be complete, and it should now be safe to compute all of the
6618 compute_delayed_physnames (cu
);
6619 do_cleanups (delayed_list_cleanup
);
6621 /* Some compilers don't define a DW_AT_high_pc attribute for the
6622 compilation unit. If the DW_AT_high_pc is missing, synthesize
6623 it, by scanning the DIE's below the compilation unit. */
6624 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
6626 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
6630 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
6632 /* Set symtab language to language from DW_AT_language. If the
6633 compilation is from a C file generated by language preprocessors, do
6634 not set the language if it was already deduced by start_subfile. */
6635 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
6636 symtab
->language
= cu
->language
;
6638 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
6639 produce DW_AT_location with location lists but it can be possibly
6640 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
6641 there were bugs in prologue debug info, fixed later in GCC-4.5
6642 by "unwind info for epilogues" patch (which is not directly related).
6644 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
6645 needed, it would be wrong due to missing DW_AT_producer there.
6647 Still one can confuse GDB by using non-standard GCC compilation
6648 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
6650 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
6651 symtab
->locations_valid
= 1;
6653 if (gcc_4_minor
>= 5)
6654 symtab
->epilogue_unwind_valid
= 1;
6656 symtab
->call_site_htab
= cu
->call_site_htab
;
6659 if (dwarf2_per_objfile
->using_index
)
6660 per_cu
->v
.quick
->symtab
= symtab
;
6663 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6664 pst
->symtab
= symtab
;
6668 /* Push it for inclusion processing later. */
6669 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
6671 do_cleanups (back_to
);
6674 /* Generate full symbol information for type unit PER_CU, whose DIEs have
6675 already been loaded into memory. */
6678 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
6679 enum language pretend_language
)
6681 struct dwarf2_cu
*cu
= per_cu
->cu
;
6682 struct objfile
*objfile
= per_cu
->objfile
;
6683 struct symtab
*symtab
;
6684 struct cleanup
*back_to
, *delayed_list_cleanup
;
6687 back_to
= make_cleanup (really_free_pendings
, NULL
);
6688 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
6690 cu
->list_in_scope
= &file_symbols
;
6692 cu
->language
= pretend_language
;
6693 cu
->language_defn
= language_def (cu
->language
);
6695 /* The symbol tables are set up in read_type_unit_scope. */
6696 process_die (cu
->dies
, cu
);
6698 /* For now fudge the Go package. */
6699 if (cu
->language
== language_go
)
6700 fixup_go_packaging (cu
);
6702 /* Now that we have processed all the DIEs in the CU, all the types
6703 should be complete, and it should now be safe to compute all of the
6705 compute_delayed_physnames (cu
);
6706 do_cleanups (delayed_list_cleanup
);
6708 /* TUs share symbol tables.
6709 If this is the first TU to use this symtab, complete the construction
6710 of it with end_symtab. Otherwise, complete the addition of this TU's
6711 symbols to the existing symtab. */
6712 if (per_cu
->s
.type_unit_group
->primary_symtab
== NULL
)
6714 symtab
= end_expandable_symtab (0, objfile
, SECT_OFF_TEXT (objfile
));
6715 per_cu
->s
.type_unit_group
->primary_symtab
= symtab
;
6719 /* Set symtab language to language from DW_AT_language. If the
6720 compilation is from a C file generated by language preprocessors,
6721 do not set the language if it was already deduced by
6723 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
6724 symtab
->language
= cu
->language
;
6729 augment_type_symtab (objfile
,
6730 per_cu
->s
.type_unit_group
->primary_symtab
);
6731 symtab
= per_cu
->s
.type_unit_group
->primary_symtab
;
6734 if (dwarf2_per_objfile
->using_index
)
6735 per_cu
->v
.quick
->symtab
= symtab
;
6738 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6739 pst
->symtab
= symtab
;
6743 do_cleanups (back_to
);
6746 /* Process an imported unit DIE. */
6749 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
6751 struct attribute
*attr
;
6753 /* For now we don't handle imported units in type units. */
6754 if (cu
->per_cu
->is_debug_types
)
6756 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6757 " supported in type units [in module %s]"),
6761 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
6764 struct dwarf2_per_cu_data
*per_cu
;
6765 struct symtab
*imported_symtab
;
6768 offset
= dwarf2_get_ref_die_offset (attr
);
6769 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
6771 /* Queue the unit, if needed. */
6772 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
6773 load_full_comp_unit (per_cu
, cu
->language
);
6775 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
6780 /* Process a die and its children. */
6783 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
6787 case DW_TAG_padding
:
6789 case DW_TAG_compile_unit
:
6790 case DW_TAG_partial_unit
:
6791 read_file_scope (die
, cu
);
6793 case DW_TAG_type_unit
:
6794 read_type_unit_scope (die
, cu
);
6796 case DW_TAG_subprogram
:
6797 case DW_TAG_inlined_subroutine
:
6798 read_func_scope (die
, cu
);
6800 case DW_TAG_lexical_block
:
6801 case DW_TAG_try_block
:
6802 case DW_TAG_catch_block
:
6803 read_lexical_block_scope (die
, cu
);
6805 case DW_TAG_GNU_call_site
:
6806 read_call_site_scope (die
, cu
);
6808 case DW_TAG_class_type
:
6809 case DW_TAG_interface_type
:
6810 case DW_TAG_structure_type
:
6811 case DW_TAG_union_type
:
6812 process_structure_scope (die
, cu
);
6814 case DW_TAG_enumeration_type
:
6815 process_enumeration_scope (die
, cu
);
6818 /* These dies have a type, but processing them does not create
6819 a symbol or recurse to process the children. Therefore we can
6820 read them on-demand through read_type_die. */
6821 case DW_TAG_subroutine_type
:
6822 case DW_TAG_set_type
:
6823 case DW_TAG_array_type
:
6824 case DW_TAG_pointer_type
:
6825 case DW_TAG_ptr_to_member_type
:
6826 case DW_TAG_reference_type
:
6827 case DW_TAG_string_type
:
6830 case DW_TAG_base_type
:
6831 case DW_TAG_subrange_type
:
6832 case DW_TAG_typedef
:
6833 /* Add a typedef symbol for the type definition, if it has a
6835 new_symbol (die
, read_type_die (die
, cu
), cu
);
6837 case DW_TAG_common_block
:
6838 read_common_block (die
, cu
);
6840 case DW_TAG_common_inclusion
:
6842 case DW_TAG_namespace
:
6843 processing_has_namespace_info
= 1;
6844 read_namespace (die
, cu
);
6847 processing_has_namespace_info
= 1;
6848 read_module (die
, cu
);
6850 case DW_TAG_imported_declaration
:
6851 case DW_TAG_imported_module
:
6852 processing_has_namespace_info
= 1;
6853 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
6854 || cu
->language
!= language_fortran
))
6855 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
6856 dwarf_tag_name (die
->tag
));
6857 read_import_statement (die
, cu
);
6860 case DW_TAG_imported_unit
:
6861 process_imported_unit_die (die
, cu
);
6865 new_symbol (die
, NULL
, cu
);
6870 /* A helper function for dwarf2_compute_name which determines whether DIE
6871 needs to have the name of the scope prepended to the name listed in the
6875 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
6877 struct attribute
*attr
;
6881 case DW_TAG_namespace
:
6882 case DW_TAG_typedef
:
6883 case DW_TAG_class_type
:
6884 case DW_TAG_interface_type
:
6885 case DW_TAG_structure_type
:
6886 case DW_TAG_union_type
:
6887 case DW_TAG_enumeration_type
:
6888 case DW_TAG_enumerator
:
6889 case DW_TAG_subprogram
:
6893 case DW_TAG_variable
:
6894 case DW_TAG_constant
:
6895 /* We only need to prefix "globally" visible variables. These include
6896 any variable marked with DW_AT_external or any variable that
6897 lives in a namespace. [Variables in anonymous namespaces
6898 require prefixing, but they are not DW_AT_external.] */
6900 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
6902 struct dwarf2_cu
*spec_cu
= cu
;
6904 return die_needs_namespace (die_specification (die
, &spec_cu
),
6908 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
6909 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
6910 && die
->parent
->tag
!= DW_TAG_module
)
6912 /* A variable in a lexical block of some kind does not need a
6913 namespace, even though in C++ such variables may be external
6914 and have a mangled name. */
6915 if (die
->parent
->tag
== DW_TAG_lexical_block
6916 || die
->parent
->tag
== DW_TAG_try_block
6917 || die
->parent
->tag
== DW_TAG_catch_block
6918 || die
->parent
->tag
== DW_TAG_subprogram
)
6927 /* Retrieve the last character from a mem_file. */
6930 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
6932 char *last_char_p
= (char *) object
;
6935 *last_char_p
= buffer
[length
- 1];
6938 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
6939 compute the physname for the object, which include a method's:
6940 - formal parameters (C++/Java),
6941 - receiver type (Go),
6942 - return type (Java).
6944 The term "physname" is a bit confusing.
6945 For C++, for example, it is the demangled name.
6946 For Go, for example, it's the mangled name.
6948 For Ada, return the DIE's linkage name rather than the fully qualified
6949 name. PHYSNAME is ignored..
6951 The result is allocated on the objfile_obstack and canonicalized. */
6954 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
6957 struct objfile
*objfile
= cu
->objfile
;
6960 name
= dwarf2_name (die
, cu
);
6962 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
6963 compute it by typename_concat inside GDB. */
6964 if (cu
->language
== language_ada
6965 || (cu
->language
== language_fortran
&& physname
))
6967 /* For Ada unit, we prefer the linkage name over the name, as
6968 the former contains the exported name, which the user expects
6969 to be able to reference. Ideally, we want the user to be able
6970 to reference this entity using either natural or linkage name,
6971 but we haven't started looking at this enhancement yet. */
6972 struct attribute
*attr
;
6974 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
6976 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
6977 if (attr
&& DW_STRING (attr
))
6978 return DW_STRING (attr
);
6981 /* These are the only languages we know how to qualify names in. */
6983 && (cu
->language
== language_cplus
|| cu
->language
== language_java
6984 || cu
->language
== language_fortran
))
6986 if (die_needs_namespace (die
, cu
))
6990 struct ui_file
*buf
;
6992 prefix
= determine_prefix (die
, cu
);
6993 buf
= mem_fileopen ();
6994 if (*prefix
!= '\0')
6996 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
6999 fputs_unfiltered (prefixed_name
, buf
);
7000 xfree (prefixed_name
);
7003 fputs_unfiltered (name
, buf
);
7005 /* Template parameters may be specified in the DIE's DW_AT_name, or
7006 as children with DW_TAG_template_type_param or
7007 DW_TAG_value_type_param. If the latter, add them to the name
7008 here. If the name already has template parameters, then
7009 skip this step; some versions of GCC emit both, and
7010 it is more efficient to use the pre-computed name.
7012 Something to keep in mind about this process: it is very
7013 unlikely, or in some cases downright impossible, to produce
7014 something that will match the mangled name of a function.
7015 If the definition of the function has the same debug info,
7016 we should be able to match up with it anyway. But fallbacks
7017 using the minimal symbol, for instance to find a method
7018 implemented in a stripped copy of libstdc++, will not work.
7019 If we do not have debug info for the definition, we will have to
7020 match them up some other way.
7022 When we do name matching there is a related problem with function
7023 templates; two instantiated function templates are allowed to
7024 differ only by their return types, which we do not add here. */
7026 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
7028 struct attribute
*attr
;
7029 struct die_info
*child
;
7032 die
->building_fullname
= 1;
7034 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
7039 struct dwarf2_locexpr_baton
*baton
;
7042 if (child
->tag
!= DW_TAG_template_type_param
7043 && child
->tag
!= DW_TAG_template_value_param
)
7048 fputs_unfiltered ("<", buf
);
7052 fputs_unfiltered (", ", buf
);
7054 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
7057 complaint (&symfile_complaints
,
7058 _("template parameter missing DW_AT_type"));
7059 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
7062 type
= die_type (child
, cu
);
7064 if (child
->tag
== DW_TAG_template_type_param
)
7066 c_print_type (type
, "", buf
, -1, 0);
7070 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
7073 complaint (&symfile_complaints
,
7074 _("template parameter missing "
7075 "DW_AT_const_value"));
7076 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
7080 dwarf2_const_value_attr (attr
, type
, name
,
7081 &cu
->comp_unit_obstack
, cu
,
7082 &value
, &bytes
, &baton
);
7084 if (TYPE_NOSIGN (type
))
7085 /* GDB prints characters as NUMBER 'CHAR'. If that's
7086 changed, this can use value_print instead. */
7087 c_printchar (value
, type
, buf
);
7090 struct value_print_options opts
;
7093 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
7097 else if (bytes
!= NULL
)
7099 v
= allocate_value (type
);
7100 memcpy (value_contents_writeable (v
), bytes
,
7101 TYPE_LENGTH (type
));
7104 v
= value_from_longest (type
, value
);
7106 /* Specify decimal so that we do not depend on
7108 get_formatted_print_options (&opts
, 'd');
7110 value_print (v
, buf
, &opts
);
7116 die
->building_fullname
= 0;
7120 /* Close the argument list, with a space if necessary
7121 (nested templates). */
7122 char last_char
= '\0';
7123 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
7124 if (last_char
== '>')
7125 fputs_unfiltered (" >", buf
);
7127 fputs_unfiltered (">", buf
);
7131 /* For Java and C++ methods, append formal parameter type
7132 information, if PHYSNAME. */
7134 if (physname
&& die
->tag
== DW_TAG_subprogram
7135 && (cu
->language
== language_cplus
7136 || cu
->language
== language_java
))
7138 struct type
*type
= read_type_die (die
, cu
);
7140 c_type_print_args (type
, buf
, 1, cu
->language
);
7142 if (cu
->language
== language_java
)
7144 /* For java, we must append the return type to method
7146 if (die
->tag
== DW_TAG_subprogram
)
7147 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
7150 else if (cu
->language
== language_cplus
)
7152 /* Assume that an artificial first parameter is
7153 "this", but do not crash if it is not. RealView
7154 marks unnamed (and thus unused) parameters as
7155 artificial; there is no way to differentiate
7157 if (TYPE_NFIELDS (type
) > 0
7158 && TYPE_FIELD_ARTIFICIAL (type
, 0)
7159 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
7160 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
7162 fputs_unfiltered (" const", buf
);
7166 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
7168 ui_file_delete (buf
);
7170 if (cu
->language
== language_cplus
)
7173 = dwarf2_canonicalize_name (name
, cu
,
7174 &objfile
->objfile_obstack
);
7185 /* Return the fully qualified name of DIE, based on its DW_AT_name.
7186 If scope qualifiers are appropriate they will be added. The result
7187 will be allocated on the objfile_obstack, or NULL if the DIE does
7188 not have a name. NAME may either be from a previous call to
7189 dwarf2_name or NULL.
7191 The output string will be canonicalized (if C++/Java). */
7194 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7196 return dwarf2_compute_name (name
, die
, cu
, 0);
7199 /* Construct a physname for the given DIE in CU. NAME may either be
7200 from a previous call to dwarf2_name or NULL. The result will be
7201 allocated on the objfile_objstack or NULL if the DIE does not have a
7204 The output string will be canonicalized (if C++/Java). */
7207 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7209 struct objfile
*objfile
= cu
->objfile
;
7210 struct attribute
*attr
;
7211 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
7212 struct cleanup
*back_to
;
7215 /* In this case dwarf2_compute_name is just a shortcut not building anything
7217 if (!die_needs_namespace (die
, cu
))
7218 return dwarf2_compute_name (name
, die
, cu
, 1);
7220 back_to
= make_cleanup (null_cleanup
, NULL
);
7222 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7224 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7226 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
7228 if (attr
&& DW_STRING (attr
))
7232 mangled
= DW_STRING (attr
);
7234 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
7235 type. It is easier for GDB users to search for such functions as
7236 `name(params)' than `long name(params)'. In such case the minimal
7237 symbol names do not match the full symbol names but for template
7238 functions there is never a need to look up their definition from their
7239 declaration so the only disadvantage remains the minimal symbol
7240 variant `long name(params)' does not have the proper inferior type.
7243 if (cu
->language
== language_go
)
7245 /* This is a lie, but we already lie to the caller new_symbol_full.
7246 new_symbol_full assumes we return the mangled name.
7247 This just undoes that lie until things are cleaned up. */
7252 demangled
= cplus_demangle (mangled
,
7253 (DMGL_PARAMS
| DMGL_ANSI
7254 | (cu
->language
== language_java
7255 ? DMGL_JAVA
| DMGL_RET_POSTFIX
7260 make_cleanup (xfree
, demangled
);
7270 if (canon
== NULL
|| check_physname
)
7272 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
7274 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
7276 /* It may not mean a bug in GDB. The compiler could also
7277 compute DW_AT_linkage_name incorrectly. But in such case
7278 GDB would need to be bug-to-bug compatible. */
7280 complaint (&symfile_complaints
,
7281 _("Computed physname <%s> does not match demangled <%s> "
7282 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
7283 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
7285 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
7286 is available here - over computed PHYSNAME. It is safer
7287 against both buggy GDB and buggy compilers. */
7301 retval
= obsavestring (retval
, strlen (retval
),
7302 &objfile
->objfile_obstack
);
7304 do_cleanups (back_to
);
7308 /* Read the import statement specified by the given die and record it. */
7311 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
7313 struct objfile
*objfile
= cu
->objfile
;
7314 struct attribute
*import_attr
;
7315 struct die_info
*imported_die
, *child_die
;
7316 struct dwarf2_cu
*imported_cu
;
7317 const char *imported_name
;
7318 const char *imported_name_prefix
;
7319 const char *canonical_name
;
7320 const char *import_alias
;
7321 const char *imported_declaration
= NULL
;
7322 const char *import_prefix
;
7323 VEC (const_char_ptr
) *excludes
= NULL
;
7324 struct cleanup
*cleanups
;
7328 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7329 if (import_attr
== NULL
)
7331 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7332 dwarf_tag_name (die
->tag
));
7337 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
7338 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7339 if (imported_name
== NULL
)
7341 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
7343 The import in the following code:
7357 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
7358 <52> DW_AT_decl_file : 1
7359 <53> DW_AT_decl_line : 6
7360 <54> DW_AT_import : <0x75>
7361 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
7363 <5b> DW_AT_decl_file : 1
7364 <5c> DW_AT_decl_line : 2
7365 <5d> DW_AT_type : <0x6e>
7367 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
7368 <76> DW_AT_byte_size : 4
7369 <77> DW_AT_encoding : 5 (signed)
7371 imports the wrong die ( 0x75 instead of 0x58 ).
7372 This case will be ignored until the gcc bug is fixed. */
7376 /* Figure out the local name after import. */
7377 import_alias
= dwarf2_name (die
, cu
);
7379 /* Figure out where the statement is being imported to. */
7380 import_prefix
= determine_prefix (die
, cu
);
7382 /* Figure out what the scope of the imported die is and prepend it
7383 to the name of the imported die. */
7384 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
7386 if (imported_die
->tag
!= DW_TAG_namespace
7387 && imported_die
->tag
!= DW_TAG_module
)
7389 imported_declaration
= imported_name
;
7390 canonical_name
= imported_name_prefix
;
7392 else if (strlen (imported_name_prefix
) > 0)
7394 temp
= alloca (strlen (imported_name_prefix
)
7395 + 2 + strlen (imported_name
) + 1);
7396 strcpy (temp
, imported_name_prefix
);
7397 strcat (temp
, "::");
7398 strcat (temp
, imported_name
);
7399 canonical_name
= temp
;
7402 canonical_name
= imported_name
;
7404 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
7406 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
7407 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
7408 child_die
= sibling_die (child_die
))
7410 /* DWARF-4: A Fortran use statement with a “rename list” may be
7411 represented by an imported module entry with an import attribute
7412 referring to the module and owned entries corresponding to those
7413 entities that are renamed as part of being imported. */
7415 if (child_die
->tag
!= DW_TAG_imported_declaration
)
7417 complaint (&symfile_complaints
,
7418 _("child DW_TAG_imported_declaration expected "
7419 "- DIE at 0x%x [in module %s]"),
7420 child_die
->offset
.sect_off
, objfile
->name
);
7424 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
7425 if (import_attr
== NULL
)
7427 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7428 dwarf_tag_name (child_die
->tag
));
7433 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
7435 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7436 if (imported_name
== NULL
)
7438 complaint (&symfile_complaints
,
7439 _("child DW_TAG_imported_declaration has unknown "
7440 "imported name - DIE at 0x%x [in module %s]"),
7441 child_die
->offset
.sect_off
, objfile
->name
);
7445 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
7447 process_die (child_die
, cu
);
7450 cp_add_using_directive (import_prefix
,
7453 imported_declaration
,
7455 &objfile
->objfile_obstack
);
7457 do_cleanups (cleanups
);
7460 /* Cleanup function for handle_DW_AT_stmt_list. */
7463 free_cu_line_header (void *arg
)
7465 struct dwarf2_cu
*cu
= arg
;
7467 free_line_header (cu
->line_header
);
7468 cu
->line_header
= NULL
;
7472 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
7473 char **name
, char **comp_dir
)
7475 struct attribute
*attr
;
7480 /* Find the filename. Do not use dwarf2_name here, since the filename
7481 is not a source language identifier. */
7482 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7485 *name
= DW_STRING (attr
);
7488 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
7490 *comp_dir
= DW_STRING (attr
);
7491 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
7493 *comp_dir
= ldirname (*name
);
7494 if (*comp_dir
!= NULL
)
7495 make_cleanup (xfree
, *comp_dir
);
7497 if (*comp_dir
!= NULL
)
7499 /* Irix 6.2 native cc prepends <machine>.: to the compilation
7500 directory, get rid of it. */
7501 char *cp
= strchr (*comp_dir
, ':');
7503 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
7508 *name
= "<unknown>";
7511 /* Handle DW_AT_stmt_list for a compilation unit.
7512 DIE is the DW_TAG_compile_unit die for CU.
7513 COMP_DIR is the compilation directory.
7514 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
7517 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
7518 const char *comp_dir
)
7520 struct attribute
*attr
;
7522 gdb_assert (! cu
->per_cu
->is_debug_types
);
7524 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7527 unsigned int line_offset
= DW_UNSND (attr
);
7528 struct line_header
*line_header
7529 = dwarf_decode_line_header (line_offset
, cu
);
7533 cu
->line_header
= line_header
;
7534 make_cleanup (free_cu_line_header
, cu
);
7535 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, 1);
7540 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
7543 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7545 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7546 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
7547 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
7548 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
7549 struct attribute
*attr
;
7551 char *comp_dir
= NULL
;
7552 struct die_info
*child_die
;
7553 bfd
*abfd
= objfile
->obfd
;
7556 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7558 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
7560 /* If we didn't find a lowpc, set it to highpc to avoid complaints
7561 from finish_block. */
7562 if (lowpc
== ((CORE_ADDR
) -1))
7567 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
7569 prepare_one_comp_unit (cu
, die
, cu
->language
);
7571 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
7572 standardised yet. As a workaround for the language detection we fall
7573 back to the DW_AT_producer string. */
7574 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
7575 cu
->language
= language_opencl
;
7577 /* Similar hack for Go. */
7578 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
7579 set_cu_language (DW_LANG_Go
, cu
);
7581 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
7583 /* Decode line number information if present. We do this before
7584 processing child DIEs, so that the line header table is available
7585 for DW_AT_decl_file. */
7586 handle_DW_AT_stmt_list (die
, cu
, comp_dir
);
7588 /* Process all dies in compilation unit. */
7589 if (die
->child
!= NULL
)
7591 child_die
= die
->child
;
7592 while (child_die
&& child_die
->tag
)
7594 process_die (child_die
, cu
);
7595 child_die
= sibling_die (child_die
);
7599 /* Decode macro information, if present. Dwarf 2 macro information
7600 refers to information in the line number info statement program
7601 header, so we can only read it if we've read the header
7603 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
7604 if (attr
&& cu
->line_header
)
7606 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
7607 complaint (&symfile_complaints
,
7608 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
7610 dwarf_decode_macros (cu
, DW_UNSND (attr
), comp_dir
, 1);
7614 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
7615 if (attr
&& cu
->line_header
)
7617 unsigned int macro_offset
= DW_UNSND (attr
);
7619 dwarf_decode_macros (cu
, macro_offset
, comp_dir
, 0);
7623 do_cleanups (back_to
);
7626 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
7627 Create the set of symtabs used by this TU, or if this TU is sharing
7628 symtabs with another TU and the symtabs have already been created
7629 then restore those symtabs in the line header.
7630 We don't need the pc/line-number mapping for type units. */
7633 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
7635 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7636 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7637 struct type_unit_group
*tu_group
;
7639 struct line_header
*lh
;
7640 struct attribute
*attr
;
7641 unsigned int i
, line_offset
;
7643 gdb_assert (per_cu
->is_debug_types
);
7645 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7647 /* If we're using .gdb_index (includes -readnow) then
7648 per_cu->s.type_unit_group may not have been set up yet. */
7649 if (per_cu
->s
.type_unit_group
== NULL
)
7650 per_cu
->s
.type_unit_group
= get_type_unit_group (per_cu
, attr
);
7651 tu_group
= per_cu
->s
.type_unit_group
;
7653 /* If we've already processed this stmt_list there's no real need to
7654 do it again, we could fake it and just recreate the part we need
7655 (file name,index -> symtab mapping). If data shows this optimization
7656 is useful we can do it then. */
7657 first_time
= tu_group
->primary_symtab
== NULL
;
7659 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
7664 line_offset
= DW_UNSND (attr
);
7665 lh
= dwarf_decode_line_header (line_offset
, cu
);
7670 dwarf2_start_symtab (cu
, "", NULL
, 0);
7673 gdb_assert (tu_group
->symtabs
== NULL
);
7676 /* Note: The primary symtab will get allocated at the end. */
7680 cu
->line_header
= lh
;
7681 make_cleanup (free_cu_line_header
, cu
);
7685 dwarf2_start_symtab (cu
, "", NULL
, 0);
7687 tu_group
->num_symtabs
= lh
->num_file_names
;
7688 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
7690 for (i
= 0; i
< lh
->num_file_names
; ++i
)
7693 struct file_entry
*fe
= &lh
->file_names
[i
];
7696 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7697 dwarf2_start_subfile (fe
->name
, dir
, NULL
);
7699 /* Note: We don't have to watch for the main subfile here, type units
7700 don't have DW_AT_name. */
7702 if (current_subfile
->symtab
== NULL
)
7704 /* NOTE: start_subfile will recognize when it's been passed
7705 a file it has already seen. So we can't assume there's a
7706 simple mapping from lh->file_names to subfiles,
7707 lh->file_names may contain dups. */
7708 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
7712 fe
->symtab
= current_subfile
->symtab
;
7713 tu_group
->symtabs
[i
] = fe
->symtab
;
7720 for (i
= 0; i
< lh
->num_file_names
; ++i
)
7722 struct file_entry
*fe
= &lh
->file_names
[i
];
7724 fe
->symtab
= tu_group
->symtabs
[i
];
7728 /* The main symtab is allocated last. Type units don't have DW_AT_name
7729 so they don't have a "real" (so to speak) symtab anyway.
7730 There is later code that will assign the main symtab to all symbols
7731 that don't have one. We need to handle the case of a symbol with a
7732 missing symtab (DW_AT_decl_file) anyway. */
7735 /* Process DW_TAG_type_unit.
7736 For TUs we want to skip the first top level sibling if it's not the
7737 actual type being defined by this TU. In this case the first top
7738 level sibling is there to provide context only. */
7741 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7743 struct die_info
*child_die
;
7745 prepare_one_comp_unit (cu
, die
, language_minimal
);
7747 /* Initialize (or reinitialize) the machinery for building symtabs.
7748 We do this before processing child DIEs, so that the line header table
7749 is available for DW_AT_decl_file. */
7750 setup_type_unit_groups (die
, cu
);
7752 if (die
->child
!= NULL
)
7754 child_die
= die
->child
;
7755 while (child_die
&& child_die
->tag
)
7757 process_die (child_die
, cu
);
7758 child_die
= sibling_die (child_die
);
7766 hash_dwo_file (const void *item
)
7768 const struct dwo_file
*dwo_file
= item
;
7770 return htab_hash_string (dwo_file
->dwo_name
);
7774 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
7776 const struct dwo_file
*lhs
= item_lhs
;
7777 const struct dwo_file
*rhs
= item_rhs
;
7779 return strcmp (lhs
->dwo_name
, rhs
->dwo_name
) == 0;
7782 /* Allocate a hash table for DWO files. */
7785 allocate_dwo_file_hash_table (void)
7787 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7789 return htab_create_alloc_ex (41,
7793 &objfile
->objfile_obstack
,
7794 hashtab_obstack_allocate
,
7795 dummy_obstack_deallocate
);
7799 hash_dwo_unit (const void *item
)
7801 const struct dwo_unit
*dwo_unit
= item
;
7803 /* This drops the top 32 bits of the id, but is ok for a hash. */
7804 return dwo_unit
->signature
;
7808 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
7810 const struct dwo_unit
*lhs
= item_lhs
;
7811 const struct dwo_unit
*rhs
= item_rhs
;
7813 /* The signature is assumed to be unique within the DWO file.
7814 So while object file CU dwo_id's always have the value zero,
7815 that's OK, assuming each object file DWO file has only one CU,
7816 and that's the rule for now. */
7817 return lhs
->signature
== rhs
->signature
;
7820 /* Allocate a hash table for DWO CUs,TUs.
7821 There is one of these tables for each of CUs,TUs for each DWO file. */
7824 allocate_dwo_unit_table (struct objfile
*objfile
)
7826 /* Start out with a pretty small number.
7827 Generally DWO files contain only one CU and maybe some TUs. */
7828 return htab_create_alloc_ex (3,
7832 &objfile
->objfile_obstack
,
7833 hashtab_obstack_allocate
,
7834 dummy_obstack_deallocate
);
7837 /* This function is mapped across the sections and remembers the offset and
7838 size of each of the DWO debugging sections we are interested in. */
7841 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_file_ptr
)
7843 struct dwo_file
*dwo_file
= dwo_file_ptr
;
7844 const struct dwo_section_names
*names
= &dwo_section_names
;
7846 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
7848 dwo_file
->sections
.abbrev
.asection
= sectp
;
7849 dwo_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
7851 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
7853 dwo_file
->sections
.info
.asection
= sectp
;
7854 dwo_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
7856 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
7858 dwo_file
->sections
.line
.asection
= sectp
;
7859 dwo_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
7861 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
7863 dwo_file
->sections
.loc
.asection
= sectp
;
7864 dwo_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
7866 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
7868 dwo_file
->sections
.macinfo
.asection
= sectp
;
7869 dwo_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
7871 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
7873 dwo_file
->sections
.macro
.asection
= sectp
;
7874 dwo_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
7876 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
7878 dwo_file
->sections
.str
.asection
= sectp
;
7879 dwo_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
7881 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
7883 dwo_file
->sections
.str_offsets
.asection
= sectp
;
7884 dwo_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
7886 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
7888 struct dwarf2_section_info type_section
;
7890 memset (&type_section
, 0, sizeof (type_section
));
7891 type_section
.asection
= sectp
;
7892 type_section
.size
= bfd_get_section_size (sectp
);
7893 VEC_safe_push (dwarf2_section_info_def
, dwo_file
->sections
.types
,
7898 /* Structure used to pass data to create_debug_info_hash_table_reader. */
7900 struct create_dwo_info_table_data
7902 struct dwo_file
*dwo_file
;
7906 /* die_reader_func for create_debug_info_hash_table. */
7909 create_debug_info_hash_table_reader (const struct die_reader_specs
*reader
,
7911 struct die_info
*comp_unit_die
,
7915 struct dwarf2_cu
*cu
= reader
->cu
;
7916 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7917 sect_offset offset
= cu
->per_cu
->offset
;
7918 struct dwarf2_section_info
*section
= cu
->per_cu
->info_or_types_section
;
7919 struct create_dwo_info_table_data
*data
= datap
;
7920 struct dwo_file
*dwo_file
= data
->dwo_file
;
7921 htab_t cu_htab
= data
->cu_htab
;
7923 struct attribute
*attr
;
7924 struct dwo_unit
*dwo_unit
;
7926 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7929 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
7930 " its dwo_id [in module %s]"),
7931 offset
.sect_off
, dwo_file
->dwo_name
);
7935 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
7936 dwo_unit
->dwo_file
= dwo_file
;
7937 dwo_unit
->signature
= DW_UNSND (attr
);
7938 dwo_unit
->info_or_types_section
= section
;
7939 dwo_unit
->offset
= offset
;
7940 dwo_unit
->length
= cu
->per_cu
->length
;
7942 slot
= htab_find_slot (cu_htab
, dwo_unit
, INSERT
);
7943 gdb_assert (slot
!= NULL
);
7946 const struct dwo_unit
*dup_dwo_unit
= *slot
;
7948 complaint (&symfile_complaints
,
7949 _("debug entry at offset 0x%x is duplicate to the entry at"
7950 " offset 0x%x, dwo_id 0x%s [in module %s]"),
7951 offset
.sect_off
, dup_dwo_unit
->offset
.sect_off
,
7952 phex (dwo_unit
->signature
, sizeof (dwo_unit
->signature
)),
7953 dwo_file
->dwo_name
);
7958 if (dwarf2_read_debug
)
7959 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id 0x%s\n",
7961 phex (dwo_unit
->signature
,
7962 sizeof (dwo_unit
->signature
)));
7965 /* Create a hash table to map DWO IDs to their CU entry in .debug_info.dwo. */
7968 create_debug_info_hash_table (struct dwo_file
*dwo_file
)
7970 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7971 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
7974 gdb_byte
*info_ptr
, *end_ptr
;
7975 struct create_dwo_info_table_data create_dwo_info_table_data
;
7977 dwarf2_read_section (objfile
, section
);
7978 info_ptr
= section
->buffer
;
7980 if (info_ptr
== NULL
)
7983 /* We can't set abfd until now because the section may be empty or
7984 not present, in which case section->asection will be NULL. */
7985 abfd
= section
->asection
->owner
;
7987 if (dwarf2_read_debug
)
7988 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_info.dwo for %s:\n",
7989 bfd_get_filename (abfd
));
7991 cu_htab
= allocate_dwo_unit_table (objfile
);
7993 create_dwo_info_table_data
.dwo_file
= dwo_file
;
7994 create_dwo_info_table_data
.cu_htab
= cu_htab
;
7996 end_ptr
= info_ptr
+ section
->size
;
7997 while (info_ptr
< end_ptr
)
7999 struct dwarf2_per_cu_data per_cu
;
8001 memset (&per_cu
, 0, sizeof (per_cu
));
8002 per_cu
.objfile
= objfile
;
8003 per_cu
.is_debug_types
= 0;
8004 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
8005 per_cu
.info_or_types_section
= section
;
8007 init_cutu_and_read_dies_no_follow (&per_cu
,
8008 &dwo_file
->sections
.abbrev
,
8010 create_debug_info_hash_table_reader
,
8011 &create_dwo_info_table_data
);
8013 info_ptr
+= per_cu
.length
;
8019 /* Subroutine of open_dwo_file to simplify it.
8020 Open the file specified by FILE_NAME and hand it off to BFD for
8021 preliminary analysis. Return a newly initialized bfd *, which
8022 includes a canonicalized copy of FILE_NAME.
8023 In case of trouble, return NULL.
8024 NOTE: This function is derived from symfile_bfd_open. */
8027 try_open_dwo_file (const char *file_name
)
8031 char *absolute_name
;
8033 desc
= openp (debug_file_directory
, OPF_TRY_CWD_FIRST
, file_name
,
8034 O_RDONLY
| O_BINARY
, &absolute_name
);
8038 sym_bfd
= bfd_fopen (absolute_name
, gnutarget
, FOPEN_RB
, desc
);
8041 xfree (absolute_name
);
8044 bfd_set_cacheable (sym_bfd
, 1);
8046 if (!bfd_check_format (sym_bfd
, bfd_object
))
8048 bfd_close (sym_bfd
); /* This also closes desc. */
8049 xfree (absolute_name
);
8053 /* bfd_usrdata exists for applications and libbfd must not touch it. */
8054 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
8059 /* Try to open DWO file DWO_NAME.
8060 COMP_DIR is the DW_AT_comp_dir attribute.
8061 The result is the bfd handle of the file.
8062 If there is a problem finding or opening the file, return NULL.
8063 Upon success, the canonicalized path of the file is stored in the bfd,
8064 same as symfile_bfd_open. */
8067 open_dwo_file (const char *dwo_name
, const char *comp_dir
)
8071 if (IS_ABSOLUTE_PATH (dwo_name
))
8072 return try_open_dwo_file (dwo_name
);
8074 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
8076 if (comp_dir
!= NULL
)
8078 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, dwo_name
, NULL
);
8080 /* NOTE: If comp_dir is a relative path, this will also try the
8081 search path, which seems useful. */
8082 abfd
= try_open_dwo_file (path_to_try
);
8083 xfree (path_to_try
);
8088 /* That didn't work, try debug-file-directory, which, despite its name,
8089 is a list of paths. */
8091 if (*debug_file_directory
== '\0')
8094 return try_open_dwo_file (dwo_name
);
8097 /* Initialize the use of the DWO file specified by DWO_NAME. */
8099 static struct dwo_file
*
8100 init_dwo_file (const char *dwo_name
, const char *comp_dir
)
8102 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8103 struct dwo_file
*dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
8106 struct cleanup
*cleanups
;
8108 if (dwarf2_read_debug
)
8109 fprintf_unfiltered (gdb_stdlog
, "Reading DWO file %s:\n", dwo_name
);
8111 abfd
= open_dwo_file (dwo_name
, comp_dir
);
8114 dwo_file
->dwo_name
= dwo_name
;
8115 dwo_file
->dwo_bfd
= abfd
;
8117 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
8119 bfd_map_over_sections (abfd
, dwarf2_locate_dwo_sections
, dwo_file
);
8121 dwo_file
->cus
= create_debug_info_hash_table (dwo_file
);
8123 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
8124 dwo_file
->sections
.types
);
8126 discard_cleanups (cleanups
);
8131 /* Lookup DWO file DWO_NAME. */
8133 static struct dwo_file
*
8134 lookup_dwo_file (char *dwo_name
, const char *comp_dir
)
8136 struct dwo_file
*dwo_file
;
8137 struct dwo_file find_entry
;
8140 if (dwarf2_per_objfile
->dwo_files
== NULL
)
8141 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
8143 /* Have we already seen this DWO file? */
8144 find_entry
.dwo_name
= dwo_name
;
8145 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
8147 /* If not, read it in and build a table of the DWOs it contains. */
8149 *slot
= init_dwo_file (dwo_name
, comp_dir
);
8151 /* NOTE: This will be NULL if unable to open the file. */
8157 /* Lookup the DWO CU referenced from THIS_CU in DWO file DWO_NAME.
8158 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
8159 SIGNATURE is the "dwo_id" of the CU (for consistency we use the same
8160 nomenclature as TUs).
8161 The result is a pointer to the dwo_unit object or NULL if we didn't find it
8162 (dwo_id mismatch or couldn't find the DWO file). */
8164 static struct dwo_unit
*
8165 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8166 char *dwo_name
, const char *comp_dir
,
8169 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8170 struct dwo_file
*dwo_file
;
8172 dwo_file
= lookup_dwo_file (dwo_name
, comp_dir
);
8173 if (dwo_file
== NULL
)
8176 /* Look up the DWO using its signature(dwo_id). */
8178 if (dwo_file
->cus
!= NULL
)
8180 struct dwo_unit find_dwo_cu
, *dwo_cu
;
8182 find_dwo_cu
.signature
= signature
;
8183 dwo_cu
= htab_find (dwo_file
->cus
, &find_dwo_cu
);
8189 /* We didn't find it. This must mean a dwo_id mismatch. */
8191 complaint (&symfile_complaints
,
8192 _("Could not find DWO CU referenced by CU at offset 0x%x"
8194 this_cu
->offset
.sect_off
, objfile
->name
);
8198 /* Lookup the DWO TU referenced from THIS_TU in DWO file DWO_NAME.
8199 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
8200 The result is a pointer to the dwo_unit object or NULL if we didn't find it
8201 (dwo_id mismatch or couldn't find the DWO file). */
8203 static struct dwo_unit
*
8204 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
8205 char *dwo_name
, const char *comp_dir
)
8207 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8208 struct dwo_file
*dwo_file
;
8210 dwo_file
= lookup_dwo_file (dwo_name
, comp_dir
);
8211 if (dwo_file
== NULL
)
8214 /* Look up the DWO using its signature(dwo_id). */
8216 if (dwo_file
->tus
!= NULL
)
8218 struct dwo_unit find_dwo_tu
, *dwo_tu
;
8220 find_dwo_tu
.signature
= this_tu
->signature
;
8221 dwo_tu
= htab_find (dwo_file
->tus
, &find_dwo_tu
);
8227 /* We didn't find it. This must mean a dwo_id mismatch. */
8229 complaint (&symfile_complaints
,
8230 _("Could not find DWO TU referenced by TU at offset 0x%x"
8232 this_tu
->per_cu
.offset
.sect_off
, objfile
->name
);
8236 /* Free all resources associated with DWO_FILE.
8237 Close the DWO file and munmap the sections.
8238 All memory should be on the objfile obstack. */
8241 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
8244 struct dwarf2_section_info
*section
;
8246 gdb_assert (dwo_file
->dwo_bfd
!= objfile
->obfd
);
8247 bfd_close (dwo_file
->dwo_bfd
);
8249 munmap_section_buffer (&dwo_file
->sections
.abbrev
);
8250 munmap_section_buffer (&dwo_file
->sections
.info
);
8251 munmap_section_buffer (&dwo_file
->sections
.line
);
8252 munmap_section_buffer (&dwo_file
->sections
.loc
);
8253 munmap_section_buffer (&dwo_file
->sections
.str
);
8254 munmap_section_buffer (&dwo_file
->sections
.str_offsets
);
8257 VEC_iterate (dwarf2_section_info_def
, dwo_file
->sections
.types
,
8260 munmap_section_buffer (section
);
8262 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
8265 /* Wrapper for free_dwo_file for use in cleanups. */
8268 free_dwo_file_cleanup (void *arg
)
8270 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
8271 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8273 free_dwo_file (dwo_file
, objfile
);
8276 /* Traversal function for free_dwo_files. */
8279 free_dwo_file_from_slot (void **slot
, void *info
)
8281 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8282 struct objfile
*objfile
= (struct objfile
*) info
;
8284 free_dwo_file (dwo_file
, objfile
);
8289 /* Free all resources associated with DWO_FILES. */
8292 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
8294 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
8297 /* Read in various DIEs. */
8299 /* qsort helper for inherit_abstract_dies. */
8302 unsigned_int_compar (const void *ap
, const void *bp
)
8304 unsigned int a
= *(unsigned int *) ap
;
8305 unsigned int b
= *(unsigned int *) bp
;
8307 return (a
> b
) - (b
> a
);
8310 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
8311 Inherit only the children of the DW_AT_abstract_origin DIE not being
8312 already referenced by DW_AT_abstract_origin from the children of the
8316 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
8318 struct die_info
*child_die
;
8319 unsigned die_children_count
;
8320 /* CU offsets which were referenced by children of the current DIE. */
8321 sect_offset
*offsets
;
8322 sect_offset
*offsets_end
, *offsetp
;
8323 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
8324 struct die_info
*origin_die
;
8325 /* Iterator of the ORIGIN_DIE children. */
8326 struct die_info
*origin_child_die
;
8327 struct cleanup
*cleanups
;
8328 struct attribute
*attr
;
8329 struct dwarf2_cu
*origin_cu
;
8330 struct pending
**origin_previous_list_in_scope
;
8332 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
8336 /* Note that following die references may follow to a die in a
8340 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
8342 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
8344 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
8345 origin_cu
->list_in_scope
= cu
->list_in_scope
;
8347 if (die
->tag
!= origin_die
->tag
8348 && !(die
->tag
== DW_TAG_inlined_subroutine
8349 && origin_die
->tag
== DW_TAG_subprogram
))
8350 complaint (&symfile_complaints
,
8351 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
8352 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
8354 child_die
= die
->child
;
8355 die_children_count
= 0;
8356 while (child_die
&& child_die
->tag
)
8358 child_die
= sibling_die (child_die
);
8359 die_children_count
++;
8361 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
8362 cleanups
= make_cleanup (xfree
, offsets
);
8364 offsets_end
= offsets
;
8365 child_die
= die
->child
;
8366 while (child_die
&& child_die
->tag
)
8368 /* For each CHILD_DIE, find the corresponding child of
8369 ORIGIN_DIE. If there is more than one layer of
8370 DW_AT_abstract_origin, follow them all; there shouldn't be,
8371 but GCC versions at least through 4.4 generate this (GCC PR
8373 struct die_info
*child_origin_die
= child_die
;
8374 struct dwarf2_cu
*child_origin_cu
= cu
;
8378 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
8382 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
8386 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
8387 counterpart may exist. */
8388 if (child_origin_die
!= child_die
)
8390 if (child_die
->tag
!= child_origin_die
->tag
8391 && !(child_die
->tag
== DW_TAG_inlined_subroutine
8392 && child_origin_die
->tag
== DW_TAG_subprogram
))
8393 complaint (&symfile_complaints
,
8394 _("Child DIE 0x%x and its abstract origin 0x%x have "
8395 "different tags"), child_die
->offset
.sect_off
,
8396 child_origin_die
->offset
.sect_off
);
8397 if (child_origin_die
->parent
!= origin_die
)
8398 complaint (&symfile_complaints
,
8399 _("Child DIE 0x%x and its abstract origin 0x%x have "
8400 "different parents"), child_die
->offset
.sect_off
,
8401 child_origin_die
->offset
.sect_off
);
8403 *offsets_end
++ = child_origin_die
->offset
;
8405 child_die
= sibling_die (child_die
);
8407 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
8408 unsigned_int_compar
);
8409 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
8410 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
8411 complaint (&symfile_complaints
,
8412 _("Multiple children of DIE 0x%x refer "
8413 "to DIE 0x%x as their abstract origin"),
8414 die
->offset
.sect_off
, offsetp
->sect_off
);
8417 origin_child_die
= origin_die
->child
;
8418 while (origin_child_die
&& origin_child_die
->tag
)
8420 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
8421 while (offsetp
< offsets_end
8422 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
8424 if (offsetp
>= offsets_end
8425 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
8427 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
8428 process_die (origin_child_die
, origin_cu
);
8430 origin_child_die
= sibling_die (origin_child_die
);
8432 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
8434 do_cleanups (cleanups
);
8438 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8440 struct objfile
*objfile
= cu
->objfile
;
8441 struct context_stack
*new;
8444 struct die_info
*child_die
;
8445 struct attribute
*attr
, *call_line
, *call_file
;
8448 struct block
*block
;
8449 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8450 VEC (symbolp
) *template_args
= NULL
;
8451 struct template_symbol
*templ_func
= NULL
;
8455 /* If we do not have call site information, we can't show the
8456 caller of this inlined function. That's too confusing, so
8457 only use the scope for local variables. */
8458 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
8459 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
8460 if (call_line
== NULL
|| call_file
== NULL
)
8462 read_lexical_block_scope (die
, cu
);
8467 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8469 name
= dwarf2_name (die
, cu
);
8471 /* Ignore functions with missing or empty names. These are actually
8472 illegal according to the DWARF standard. */
8475 complaint (&symfile_complaints
,
8476 _("missing name for subprogram DIE at %d"),
8477 die
->offset
.sect_off
);
8481 /* Ignore functions with missing or invalid low and high pc attributes. */
8482 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
8484 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8485 if (!attr
|| !DW_UNSND (attr
))
8486 complaint (&symfile_complaints
,
8487 _("cannot get low and high bounds "
8488 "for subprogram DIE at %d"),
8489 die
->offset
.sect_off
);
8496 /* If we have any template arguments, then we must allocate a
8497 different sort of symbol. */
8498 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
8500 if (child_die
->tag
== DW_TAG_template_type_param
8501 || child_die
->tag
== DW_TAG_template_value_param
)
8503 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
8504 struct template_symbol
);
8505 templ_func
->base
.is_cplus_template_function
= 1;
8510 new = push_context (0, lowpc
);
8511 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
8512 (struct symbol
*) templ_func
);
8514 /* If there is a location expression for DW_AT_frame_base, record
8516 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
8518 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
8519 expression is being recorded directly in the function's symbol
8520 and not in a separate frame-base object. I guess this hack is
8521 to avoid adding some sort of frame-base adjunct/annex to the
8522 function's symbol :-(. The problem with doing this is that it
8523 results in a function symbol with a location expression that
8524 has nothing to do with the location of the function, ouch! The
8525 relationship should be: a function's symbol has-a frame base; a
8526 frame-base has-a location expression. */
8527 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
8529 cu
->list_in_scope
= &local_symbols
;
8531 if (die
->child
!= NULL
)
8533 child_die
= die
->child
;
8534 while (child_die
&& child_die
->tag
)
8536 if (child_die
->tag
== DW_TAG_template_type_param
8537 || child_die
->tag
== DW_TAG_template_value_param
)
8539 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
8542 VEC_safe_push (symbolp
, template_args
, arg
);
8545 process_die (child_die
, cu
);
8546 child_die
= sibling_die (child_die
);
8550 inherit_abstract_dies (die
, cu
);
8552 /* If we have a DW_AT_specification, we might need to import using
8553 directives from the context of the specification DIE. See the
8554 comment in determine_prefix. */
8555 if (cu
->language
== language_cplus
8556 && dwarf2_attr (die
, DW_AT_specification
, cu
))
8558 struct dwarf2_cu
*spec_cu
= cu
;
8559 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
8563 child_die
= spec_die
->child
;
8564 while (child_die
&& child_die
->tag
)
8566 if (child_die
->tag
== DW_TAG_imported_module
)
8567 process_die (child_die
, spec_cu
);
8568 child_die
= sibling_die (child_die
);
8571 /* In some cases, GCC generates specification DIEs that
8572 themselves contain DW_AT_specification attributes. */
8573 spec_die
= die_specification (spec_die
, &spec_cu
);
8577 new = pop_context ();
8578 /* Make a block for the local symbols within. */
8579 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
8580 lowpc
, highpc
, objfile
);
8582 /* For C++, set the block's scope. */
8583 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
8584 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
8585 determine_prefix (die
, cu
),
8586 processing_has_namespace_info
);
8588 /* If we have address ranges, record them. */
8589 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
8591 /* Attach template arguments to function. */
8592 if (! VEC_empty (symbolp
, template_args
))
8594 gdb_assert (templ_func
!= NULL
);
8596 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
8597 templ_func
->template_arguments
8598 = obstack_alloc (&objfile
->objfile_obstack
,
8599 (templ_func
->n_template_arguments
8600 * sizeof (struct symbol
*)));
8601 memcpy (templ_func
->template_arguments
,
8602 VEC_address (symbolp
, template_args
),
8603 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
8604 VEC_free (symbolp
, template_args
);
8607 /* In C++, we can have functions nested inside functions (e.g., when
8608 a function declares a class that has methods). This means that
8609 when we finish processing a function scope, we may need to go
8610 back to building a containing block's symbol lists. */
8611 local_symbols
= new->locals
;
8612 param_symbols
= new->params
;
8613 using_directives
= new->using_directives
;
8615 /* If we've finished processing a top-level function, subsequent
8616 symbols go in the file symbol list. */
8617 if (outermost_context_p ())
8618 cu
->list_in_scope
= &file_symbols
;
8621 /* Process all the DIES contained within a lexical block scope. Start
8622 a new scope, process the dies, and then close the scope. */
8625 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8627 struct objfile
*objfile
= cu
->objfile
;
8628 struct context_stack
*new;
8629 CORE_ADDR lowpc
, highpc
;
8630 struct die_info
*child_die
;
8633 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8635 /* Ignore blocks with missing or invalid low and high pc attributes. */
8636 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
8637 as multiple lexical blocks? Handling children in a sane way would
8638 be nasty. Might be easier to properly extend generic blocks to
8640 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
8645 push_context (0, lowpc
);
8646 if (die
->child
!= NULL
)
8648 child_die
= die
->child
;
8649 while (child_die
&& child_die
->tag
)
8651 process_die (child_die
, cu
);
8652 child_die
= sibling_die (child_die
);
8655 new = pop_context ();
8657 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
8660 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
8663 /* Note that recording ranges after traversing children, as we
8664 do here, means that recording a parent's ranges entails
8665 walking across all its children's ranges as they appear in
8666 the address map, which is quadratic behavior.
8668 It would be nicer to record the parent's ranges before
8669 traversing its children, simply overriding whatever you find
8670 there. But since we don't even decide whether to create a
8671 block until after we've traversed its children, that's hard
8673 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
8675 local_symbols
= new->locals
;
8676 using_directives
= new->using_directives
;
8679 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
8682 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8684 struct objfile
*objfile
= cu
->objfile
;
8685 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8686 CORE_ADDR pc
, baseaddr
;
8687 struct attribute
*attr
;
8688 struct call_site
*call_site
, call_site_local
;
8691 struct die_info
*child_die
;
8693 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8695 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8698 complaint (&symfile_complaints
,
8699 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
8700 "DIE 0x%x [in module %s]"),
8701 die
->offset
.sect_off
, objfile
->name
);
8704 pc
= DW_ADDR (attr
) + baseaddr
;
8706 if (cu
->call_site_htab
== NULL
)
8707 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
8708 NULL
, &objfile
->objfile_obstack
,
8709 hashtab_obstack_allocate
, NULL
);
8710 call_site_local
.pc
= pc
;
8711 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
8714 complaint (&symfile_complaints
,
8715 _("Duplicate PC %s for DW_TAG_GNU_call_site "
8716 "DIE 0x%x [in module %s]"),
8717 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
8721 /* Count parameters at the caller. */
8724 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8725 child_die
= sibling_die (child_die
))
8727 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
8729 complaint (&symfile_complaints
,
8730 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
8731 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
8732 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
8739 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
8740 (sizeof (*call_site
)
8741 + (sizeof (*call_site
->parameter
)
8744 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
8747 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
8749 struct die_info
*func_die
;
8751 /* Skip also over DW_TAG_inlined_subroutine. */
8752 for (func_die
= die
->parent
;
8753 func_die
&& func_die
->tag
!= DW_TAG_subprogram
8754 && func_die
->tag
!= DW_TAG_subroutine_type
;
8755 func_die
= func_die
->parent
);
8757 /* DW_AT_GNU_all_call_sites is a superset
8758 of DW_AT_GNU_all_tail_call_sites. */
8760 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
8761 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
8763 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
8764 not complete. But keep CALL_SITE for look ups via call_site_htab,
8765 both the initial caller containing the real return address PC and
8766 the final callee containing the current PC of a chain of tail
8767 calls do not need to have the tail call list complete. But any
8768 function candidate for a virtual tail call frame searched via
8769 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
8770 determined unambiguously. */
8774 struct type
*func_type
= NULL
;
8777 func_type
= get_die_type (func_die
, cu
);
8778 if (func_type
!= NULL
)
8780 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
8782 /* Enlist this call site to the function. */
8783 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
8784 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
8787 complaint (&symfile_complaints
,
8788 _("Cannot find function owning DW_TAG_GNU_call_site "
8789 "DIE 0x%x [in module %s]"),
8790 die
->offset
.sect_off
, objfile
->name
);
8794 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
8796 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
8797 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
8798 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
8799 /* Keep NULL DWARF_BLOCK. */;
8800 else if (attr_form_is_block (attr
))
8802 struct dwarf2_locexpr_baton
*dlbaton
;
8804 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
8805 dlbaton
->data
= DW_BLOCK (attr
)->data
;
8806 dlbaton
->size
= DW_BLOCK (attr
)->size
;
8807 dlbaton
->per_cu
= cu
->per_cu
;
8809 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
8811 else if (is_ref_attr (attr
))
8813 struct dwarf2_cu
*target_cu
= cu
;
8814 struct die_info
*target_die
;
8816 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
8817 gdb_assert (target_cu
->objfile
== objfile
);
8818 if (die_is_declaration (target_die
, target_cu
))
8820 const char *target_physname
;
8822 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
8823 if (target_physname
== NULL
)
8824 complaint (&symfile_complaints
,
8825 _("DW_AT_GNU_call_site_target target DIE has invalid "
8826 "physname, for referencing DIE 0x%x [in module %s]"),
8827 die
->offset
.sect_off
, objfile
->name
);
8829 SET_FIELD_PHYSNAME (call_site
->target
, (char *) target_physname
);
8835 /* DW_AT_entry_pc should be preferred. */
8836 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
8837 complaint (&symfile_complaints
,
8838 _("DW_AT_GNU_call_site_target target DIE has invalid "
8839 "low pc, for referencing DIE 0x%x [in module %s]"),
8840 die
->offset
.sect_off
, objfile
->name
);
8842 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
8846 complaint (&symfile_complaints
,
8847 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
8848 "block nor reference, for DIE 0x%x [in module %s]"),
8849 die
->offset
.sect_off
, objfile
->name
);
8851 call_site
->per_cu
= cu
->per_cu
;
8853 for (child_die
= die
->child
;
8854 child_die
&& child_die
->tag
;
8855 child_die
= sibling_die (child_die
))
8857 struct call_site_parameter
*parameter
;
8858 struct attribute
*loc
, *origin
;
8860 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
8862 /* Already printed the complaint above. */
8866 gdb_assert (call_site
->parameter_count
< nparams
);
8867 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
8869 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
8870 specifies DW_TAG_formal_parameter. Value of the data assumed for the
8871 register is contained in DW_AT_GNU_call_site_value. */
8873 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
8874 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
8875 if (loc
== NULL
&& origin
!= NULL
&& is_ref_attr (origin
))
8879 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
8880 offset
= dwarf2_get_ref_die_offset (origin
);
8881 gdb_assert (offset
.sect_off
>= cu
->header
.offset
.sect_off
);
8882 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
8883 - cu
->header
.offset
.sect_off
);
8885 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
8887 complaint (&symfile_complaints
,
8888 _("No DW_FORM_block* DW_AT_location for "
8889 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
8890 child_die
->offset
.sect_off
, objfile
->name
);
8895 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
8896 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
8897 if (parameter
->u
.dwarf_reg
!= -1)
8898 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
8899 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
8900 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
8901 ¶meter
->u
.fb_offset
))
8902 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
8905 complaint (&symfile_complaints
,
8906 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
8907 "for DW_FORM_block* DW_AT_location is supported for "
8908 "DW_TAG_GNU_call_site child DIE 0x%x "
8910 child_die
->offset
.sect_off
, objfile
->name
);
8915 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
8916 if (!attr_form_is_block (attr
))
8918 complaint (&symfile_complaints
,
8919 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
8920 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
8921 child_die
->offset
.sect_off
, objfile
->name
);
8924 parameter
->value
= DW_BLOCK (attr
)->data
;
8925 parameter
->value_size
= DW_BLOCK (attr
)->size
;
8927 /* Parameters are not pre-cleared by memset above. */
8928 parameter
->data_value
= NULL
;
8929 parameter
->data_value_size
= 0;
8930 call_site
->parameter_count
++;
8932 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
8935 if (!attr_form_is_block (attr
))
8936 complaint (&symfile_complaints
,
8937 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
8938 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
8939 child_die
->offset
.sect_off
, objfile
->name
);
8942 parameter
->data_value
= DW_BLOCK (attr
)->data
;
8943 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
8949 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
8950 Return 1 if the attributes are present and valid, otherwise, return 0.
8951 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
8954 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
8955 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
8956 struct partial_symtab
*ranges_pst
)
8958 struct objfile
*objfile
= cu
->objfile
;
8959 struct comp_unit_head
*cu_header
= &cu
->header
;
8960 bfd
*obfd
= objfile
->obfd
;
8961 unsigned int addr_size
= cu_header
->addr_size
;
8962 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
8963 /* Base address selection entry. */
8974 found_base
= cu
->base_known
;
8975 base
= cu
->base_address
;
8977 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
8978 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
8980 complaint (&symfile_complaints
,
8981 _("Offset %d out of bounds for DW_AT_ranges attribute"),
8985 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
8987 /* Read in the largest possible address. */
8988 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
8989 if ((marker
& mask
) == mask
)
8991 /* If we found the largest possible address, then
8992 read the base address. */
8993 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
8994 buffer
+= 2 * addr_size
;
8995 offset
+= 2 * addr_size
;
9001 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9005 CORE_ADDR range_beginning
, range_end
;
9007 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
9008 buffer
+= addr_size
;
9009 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
9010 buffer
+= addr_size
;
9011 offset
+= 2 * addr_size
;
9013 /* An end of list marker is a pair of zero addresses. */
9014 if (range_beginning
== 0 && range_end
== 0)
9015 /* Found the end of list entry. */
9018 /* Each base address selection entry is a pair of 2 values.
9019 The first is the largest possible address, the second is
9020 the base address. Check for a base address here. */
9021 if ((range_beginning
& mask
) == mask
)
9023 /* If we found the largest possible address, then
9024 read the base address. */
9025 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
9032 /* We have no valid base address for the ranges
9034 complaint (&symfile_complaints
,
9035 _("Invalid .debug_ranges data (no base address)"));
9039 if (range_beginning
> range_end
)
9041 /* Inverted range entries are invalid. */
9042 complaint (&symfile_complaints
,
9043 _("Invalid .debug_ranges data (inverted range)"));
9047 /* Empty range entries have no effect. */
9048 if (range_beginning
== range_end
)
9051 range_beginning
+= base
;
9054 if (ranges_pst
!= NULL
)
9055 addrmap_set_empty (objfile
->psymtabs_addrmap
,
9056 range_beginning
+ baseaddr
,
9057 range_end
- 1 + baseaddr
,
9060 /* FIXME: This is recording everything as a low-high
9061 segment of consecutive addresses. We should have a
9062 data structure for discontiguous block ranges
9066 low
= range_beginning
;
9072 if (range_beginning
< low
)
9073 low
= range_beginning
;
9074 if (range_end
> high
)
9080 /* If the first entry is an end-of-list marker, the range
9081 describes an empty scope, i.e. no instructions. */
9087 *high_return
= high
;
9091 /* Get low and high pc attributes from a die. Return 1 if the attributes
9092 are present and valid, otherwise, return 0. Return -1 if the range is
9093 discontinuous, i.e. derived from DW_AT_ranges information. */
9096 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
9097 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
9098 struct partial_symtab
*pst
)
9100 struct attribute
*attr
;
9101 struct attribute
*attr_high
;
9106 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
9109 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
9112 low
= DW_ADDR (attr
);
9113 if (attr_high
->form
== DW_FORM_addr
9114 || attr_high
->form
== DW_FORM_GNU_addr_index
)
9115 high
= DW_ADDR (attr_high
);
9117 high
= low
+ DW_UNSND (attr_high
);
9120 /* Found high w/o low attribute. */
9123 /* Found consecutive range of addresses. */
9128 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
9131 unsigned int ranges_offset
= DW_UNSND (attr
) + cu
->ranges_base
;
9133 /* Value of the DW_AT_ranges attribute is the offset in the
9134 .debug_ranges section. */
9135 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
9137 /* Found discontinuous range of addresses. */
9142 /* read_partial_die has also the strict LOW < HIGH requirement. */
9146 /* When using the GNU linker, .gnu.linkonce. sections are used to
9147 eliminate duplicate copies of functions and vtables and such.
9148 The linker will arbitrarily choose one and discard the others.
9149 The AT_*_pc values for such functions refer to local labels in
9150 these sections. If the section from that file was discarded, the
9151 labels are not in the output, so the relocs get a value of 0.
9152 If this is a discarded function, mark the pc bounds as invalid,
9153 so that GDB will ignore it. */
9154 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
9163 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
9164 its low and high PC addresses. Do nothing if these addresses could not
9165 be determined. Otherwise, set LOWPC to the low address if it is smaller,
9166 and HIGHPC to the high address if greater than HIGHPC. */
9169 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
9170 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9171 struct dwarf2_cu
*cu
)
9173 CORE_ADDR low
, high
;
9174 struct die_info
*child
= die
->child
;
9176 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
9178 *lowpc
= min (*lowpc
, low
);
9179 *highpc
= max (*highpc
, high
);
9182 /* If the language does not allow nested subprograms (either inside
9183 subprograms or lexical blocks), we're done. */
9184 if (cu
->language
!= language_ada
)
9187 /* Check all the children of the given DIE. If it contains nested
9188 subprograms, then check their pc bounds. Likewise, we need to
9189 check lexical blocks as well, as they may also contain subprogram
9191 while (child
&& child
->tag
)
9193 if (child
->tag
== DW_TAG_subprogram
9194 || child
->tag
== DW_TAG_lexical_block
)
9195 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
9196 child
= sibling_die (child
);
9200 /* Get the low and high pc's represented by the scope DIE, and store
9201 them in *LOWPC and *HIGHPC. If the correct values can't be
9202 determined, set *LOWPC to -1 and *HIGHPC to 0. */
9205 get_scope_pc_bounds (struct die_info
*die
,
9206 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9207 struct dwarf2_cu
*cu
)
9209 CORE_ADDR best_low
= (CORE_ADDR
) -1;
9210 CORE_ADDR best_high
= (CORE_ADDR
) 0;
9211 CORE_ADDR current_low
, current_high
;
9213 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
9215 best_low
= current_low
;
9216 best_high
= current_high
;
9220 struct die_info
*child
= die
->child
;
9222 while (child
&& child
->tag
)
9224 switch (child
->tag
) {
9225 case DW_TAG_subprogram
:
9226 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
9228 case DW_TAG_namespace
:
9230 /* FIXME: carlton/2004-01-16: Should we do this for
9231 DW_TAG_class_type/DW_TAG_structure_type, too? I think
9232 that current GCC's always emit the DIEs corresponding
9233 to definitions of methods of classes as children of a
9234 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
9235 the DIEs giving the declarations, which could be
9236 anywhere). But I don't see any reason why the
9237 standards says that they have to be there. */
9238 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
9240 if (current_low
!= ((CORE_ADDR
) -1))
9242 best_low
= min (best_low
, current_low
);
9243 best_high
= max (best_high
, current_high
);
9251 child
= sibling_die (child
);
9256 *highpc
= best_high
;
9259 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
9263 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
9264 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
9266 struct objfile
*objfile
= cu
->objfile
;
9267 struct attribute
*attr
;
9268 struct attribute
*attr_high
;
9270 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
9273 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
9276 CORE_ADDR low
= DW_ADDR (attr
);
9278 if (attr_high
->form
== DW_FORM_addr
9279 || attr_high
->form
== DW_FORM_GNU_addr_index
)
9280 high
= DW_ADDR (attr_high
);
9282 high
= low
+ DW_UNSND (attr_high
);
9284 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
9288 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
9291 bfd
*obfd
= objfile
->obfd
;
9293 /* The value of the DW_AT_ranges attribute is the offset of the
9294 address range list in the .debug_ranges section. */
9295 unsigned long offset
= DW_UNSND (attr
) + cu
->ranges_base
;
9296 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
9298 /* For some target architectures, but not others, the
9299 read_address function sign-extends the addresses it returns.
9300 To recognize base address selection entries, we need a
9302 unsigned int addr_size
= cu
->header
.addr_size
;
9303 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
9305 /* The base address, to which the next pair is relative. Note
9306 that this 'base' is a DWARF concept: most entries in a range
9307 list are relative, to reduce the number of relocs against the
9308 debugging information. This is separate from this function's
9309 'baseaddr' argument, which GDB uses to relocate debugging
9310 information from a shared library based on the address at
9311 which the library was loaded. */
9312 CORE_ADDR base
= cu
->base_address
;
9313 int base_known
= cu
->base_known
;
9315 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
9316 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
9318 complaint (&symfile_complaints
,
9319 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
9326 unsigned int bytes_read
;
9327 CORE_ADDR start
, end
;
9329 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
9330 buffer
+= bytes_read
;
9331 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
9332 buffer
+= bytes_read
;
9334 /* Did we find the end of the range list? */
9335 if (start
== 0 && end
== 0)
9338 /* Did we find a base address selection entry? */
9339 else if ((start
& base_select_mask
) == base_select_mask
)
9345 /* We found an ordinary address range. */
9350 complaint (&symfile_complaints
,
9351 _("Invalid .debug_ranges data "
9352 "(no base address)"));
9358 /* Inverted range entries are invalid. */
9359 complaint (&symfile_complaints
,
9360 _("Invalid .debug_ranges data "
9361 "(inverted range)"));
9365 /* Empty range entries have no effect. */
9369 record_block_range (block
,
9370 baseaddr
+ base
+ start
,
9371 baseaddr
+ base
+ end
- 1);
9377 /* Check whether the producer field indicates either of GCC < 4.6, or the
9378 Intel C/C++ compiler, and cache the result in CU. */
9381 check_producer (struct dwarf2_cu
*cu
)
9384 int major
, minor
, release
;
9386 if (cu
->producer
== NULL
)
9388 /* For unknown compilers expect their behavior is DWARF version
9391 GCC started to support .debug_types sections by -gdwarf-4 since
9392 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
9393 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
9394 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
9395 interpreted incorrectly by GDB now - GCC PR debug/48229. */
9397 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
9399 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
9401 cs
= &cu
->producer
[strlen ("GNU ")];
9402 while (*cs
&& !isdigit (*cs
))
9404 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
9406 /* Not recognized as GCC. */
9409 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
9411 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
9412 cu
->producer_is_icc
= 1;
9415 /* For other non-GCC compilers, expect their behavior is DWARF version
9419 cu
->checked_producer
= 1;
9422 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
9423 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
9424 during 4.6.0 experimental. */
9427 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
9429 if (!cu
->checked_producer
)
9430 check_producer (cu
);
9432 return cu
->producer_is_gxx_lt_4_6
;
9435 /* Return the default accessibility type if it is not overriden by
9436 DW_AT_accessibility. */
9438 static enum dwarf_access_attribute
9439 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
9441 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
9443 /* The default DWARF 2 accessibility for members is public, the default
9444 accessibility for inheritance is private. */
9446 if (die
->tag
!= DW_TAG_inheritance
)
9447 return DW_ACCESS_public
;
9449 return DW_ACCESS_private
;
9453 /* DWARF 3+ defines the default accessibility a different way. The same
9454 rules apply now for DW_TAG_inheritance as for the members and it only
9455 depends on the container kind. */
9457 if (die
->parent
->tag
== DW_TAG_class_type
)
9458 return DW_ACCESS_private
;
9460 return DW_ACCESS_public
;
9464 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
9465 offset. If the attribute was not found return 0, otherwise return
9466 1. If it was found but could not properly be handled, set *OFFSET
9470 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
9473 struct attribute
*attr
;
9475 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
9480 /* Note that we do not check for a section offset first here.
9481 This is because DW_AT_data_member_location is new in DWARF 4,
9482 so if we see it, we can assume that a constant form is really
9483 a constant and not a section offset. */
9484 if (attr_form_is_constant (attr
))
9485 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
9486 else if (attr_form_is_section_offset (attr
))
9487 dwarf2_complex_location_expr_complaint ();
9488 else if (attr_form_is_block (attr
))
9489 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
9491 dwarf2_complex_location_expr_complaint ();
9499 /* Add an aggregate field to the field list. */
9502 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
9503 struct dwarf2_cu
*cu
)
9505 struct objfile
*objfile
= cu
->objfile
;
9506 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9507 struct nextfield
*new_field
;
9508 struct attribute
*attr
;
9510 char *fieldname
= "";
9512 /* Allocate a new field list entry and link it in. */
9513 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
9514 make_cleanup (xfree
, new_field
);
9515 memset (new_field
, 0, sizeof (struct nextfield
));
9517 if (die
->tag
== DW_TAG_inheritance
)
9519 new_field
->next
= fip
->baseclasses
;
9520 fip
->baseclasses
= new_field
;
9524 new_field
->next
= fip
->fields
;
9525 fip
->fields
= new_field
;
9529 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
9531 new_field
->accessibility
= DW_UNSND (attr
);
9533 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
9534 if (new_field
->accessibility
!= DW_ACCESS_public
)
9535 fip
->non_public_fields
= 1;
9537 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
9539 new_field
->virtuality
= DW_UNSND (attr
);
9541 new_field
->virtuality
= DW_VIRTUALITY_none
;
9543 fp
= &new_field
->field
;
9545 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
9549 /* Data member other than a C++ static data member. */
9551 /* Get type of field. */
9552 fp
->type
= die_type (die
, cu
);
9554 SET_FIELD_BITPOS (*fp
, 0);
9556 /* Get bit size of field (zero if none). */
9557 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
9560 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
9564 FIELD_BITSIZE (*fp
) = 0;
9567 /* Get bit offset of field. */
9568 if (handle_data_member_location (die
, cu
, &offset
))
9569 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
9570 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
9573 if (gdbarch_bits_big_endian (gdbarch
))
9575 /* For big endian bits, the DW_AT_bit_offset gives the
9576 additional bit offset from the MSB of the containing
9577 anonymous object to the MSB of the field. We don't
9578 have to do anything special since we don't need to
9579 know the size of the anonymous object. */
9580 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
9584 /* For little endian bits, compute the bit offset to the
9585 MSB of the anonymous object, subtract off the number of
9586 bits from the MSB of the field to the MSB of the
9587 object, and then subtract off the number of bits of
9588 the field itself. The result is the bit offset of
9589 the LSB of the field. */
9591 int bit_offset
= DW_UNSND (attr
);
9593 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9596 /* The size of the anonymous object containing
9597 the bit field is explicit, so use the
9598 indicated size (in bytes). */
9599 anonymous_size
= DW_UNSND (attr
);
9603 /* The size of the anonymous object containing
9604 the bit field must be inferred from the type
9605 attribute of the data member containing the
9607 anonymous_size
= TYPE_LENGTH (fp
->type
);
9609 SET_FIELD_BITPOS (*fp
,
9611 + anonymous_size
* bits_per_byte
9612 - bit_offset
- FIELD_BITSIZE (*fp
)));
9616 /* Get name of field. */
9617 fieldname
= dwarf2_name (die
, cu
);
9618 if (fieldname
== NULL
)
9621 /* The name is already allocated along with this objfile, so we don't
9622 need to duplicate it for the type. */
9623 fp
->name
= fieldname
;
9625 /* Change accessibility for artificial fields (e.g. virtual table
9626 pointer or virtual base class pointer) to private. */
9627 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
9629 FIELD_ARTIFICIAL (*fp
) = 1;
9630 new_field
->accessibility
= DW_ACCESS_private
;
9631 fip
->non_public_fields
= 1;
9634 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
9636 /* C++ static member. */
9638 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
9639 is a declaration, but all versions of G++ as of this writing
9640 (so through at least 3.2.1) incorrectly generate
9641 DW_TAG_variable tags. */
9643 const char *physname
;
9645 /* Get name of field. */
9646 fieldname
= dwarf2_name (die
, cu
);
9647 if (fieldname
== NULL
)
9650 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
9652 /* Only create a symbol if this is an external value.
9653 new_symbol checks this and puts the value in the global symbol
9654 table, which we want. If it is not external, new_symbol
9655 will try to put the value in cu->list_in_scope which is wrong. */
9656 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
9658 /* A static const member, not much different than an enum as far as
9659 we're concerned, except that we can support more types. */
9660 new_symbol (die
, NULL
, cu
);
9663 /* Get physical name. */
9664 physname
= dwarf2_physname (fieldname
, die
, cu
);
9666 /* The name is already allocated along with this objfile, so we don't
9667 need to duplicate it for the type. */
9668 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
9669 FIELD_TYPE (*fp
) = die_type (die
, cu
);
9670 FIELD_NAME (*fp
) = fieldname
;
9672 else if (die
->tag
== DW_TAG_inheritance
)
9676 /* C++ base class field. */
9677 if (handle_data_member_location (die
, cu
, &offset
))
9678 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
9679 FIELD_BITSIZE (*fp
) = 0;
9680 FIELD_TYPE (*fp
) = die_type (die
, cu
);
9681 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
9682 fip
->nbaseclasses
++;
9686 /* Add a typedef defined in the scope of the FIP's class. */
9689 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
9690 struct dwarf2_cu
*cu
)
9692 struct objfile
*objfile
= cu
->objfile
;
9693 struct typedef_field_list
*new_field
;
9694 struct attribute
*attr
;
9695 struct typedef_field
*fp
;
9696 char *fieldname
= "";
9698 /* Allocate a new field list entry and link it in. */
9699 new_field
= xzalloc (sizeof (*new_field
));
9700 make_cleanup (xfree
, new_field
);
9702 gdb_assert (die
->tag
== DW_TAG_typedef
);
9704 fp
= &new_field
->field
;
9706 /* Get name of field. */
9707 fp
->name
= dwarf2_name (die
, cu
);
9708 if (fp
->name
== NULL
)
9711 fp
->type
= read_type_die (die
, cu
);
9713 new_field
->next
= fip
->typedef_field_list
;
9714 fip
->typedef_field_list
= new_field
;
9715 fip
->typedef_field_list_count
++;
9718 /* Create the vector of fields, and attach it to the type. */
9721 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
9722 struct dwarf2_cu
*cu
)
9724 int nfields
= fip
->nfields
;
9726 /* Record the field count, allocate space for the array of fields,
9727 and create blank accessibility bitfields if necessary. */
9728 TYPE_NFIELDS (type
) = nfields
;
9729 TYPE_FIELDS (type
) = (struct field
*)
9730 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
9731 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
9733 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
9735 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
9737 TYPE_FIELD_PRIVATE_BITS (type
) =
9738 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
9739 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
9741 TYPE_FIELD_PROTECTED_BITS (type
) =
9742 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
9743 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
9745 TYPE_FIELD_IGNORE_BITS (type
) =
9746 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
9747 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
9750 /* If the type has baseclasses, allocate and clear a bit vector for
9751 TYPE_FIELD_VIRTUAL_BITS. */
9752 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
9754 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
9755 unsigned char *pointer
;
9757 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
9758 pointer
= TYPE_ALLOC (type
, num_bytes
);
9759 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
9760 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
9761 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
9764 /* Copy the saved-up fields into the field vector. Start from the head of
9765 the list, adding to the tail of the field array, so that they end up in
9766 the same order in the array in which they were added to the list. */
9767 while (nfields
-- > 0)
9769 struct nextfield
*fieldp
;
9773 fieldp
= fip
->fields
;
9774 fip
->fields
= fieldp
->next
;
9778 fieldp
= fip
->baseclasses
;
9779 fip
->baseclasses
= fieldp
->next
;
9782 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
9783 switch (fieldp
->accessibility
)
9785 case DW_ACCESS_private
:
9786 if (cu
->language
!= language_ada
)
9787 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
9790 case DW_ACCESS_protected
:
9791 if (cu
->language
!= language_ada
)
9792 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
9795 case DW_ACCESS_public
:
9799 /* Unknown accessibility. Complain and treat it as public. */
9801 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
9802 fieldp
->accessibility
);
9806 if (nfields
< fip
->nbaseclasses
)
9808 switch (fieldp
->virtuality
)
9810 case DW_VIRTUALITY_virtual
:
9811 case DW_VIRTUALITY_pure_virtual
:
9812 if (cu
->language
== language_ada
)
9813 error (_("unexpected virtuality in component of Ada type"));
9814 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
9821 /* Add a member function to the proper fieldlist. */
9824 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
9825 struct type
*type
, struct dwarf2_cu
*cu
)
9827 struct objfile
*objfile
= cu
->objfile
;
9828 struct attribute
*attr
;
9829 struct fnfieldlist
*flp
;
9831 struct fn_field
*fnp
;
9833 struct nextfnfield
*new_fnfield
;
9834 struct type
*this_type
;
9835 enum dwarf_access_attribute accessibility
;
9837 if (cu
->language
== language_ada
)
9838 error (_("unexpected member function in Ada type"));
9840 /* Get name of member function. */
9841 fieldname
= dwarf2_name (die
, cu
);
9842 if (fieldname
== NULL
)
9845 /* Look up member function name in fieldlist. */
9846 for (i
= 0; i
< fip
->nfnfields
; i
++)
9848 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
9852 /* Create new list element if necessary. */
9853 if (i
< fip
->nfnfields
)
9854 flp
= &fip
->fnfieldlists
[i
];
9857 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
9859 fip
->fnfieldlists
= (struct fnfieldlist
*)
9860 xrealloc (fip
->fnfieldlists
,
9861 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
9862 * sizeof (struct fnfieldlist
));
9863 if (fip
->nfnfields
== 0)
9864 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
9866 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
9867 flp
->name
= fieldname
;
9870 i
= fip
->nfnfields
++;
9873 /* Create a new member function field and chain it to the field list
9875 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
9876 make_cleanup (xfree
, new_fnfield
);
9877 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
9878 new_fnfield
->next
= flp
->head
;
9879 flp
->head
= new_fnfield
;
9882 /* Fill in the member function field info. */
9883 fnp
= &new_fnfield
->fnfield
;
9885 /* Delay processing of the physname until later. */
9886 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
9888 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
9893 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
9894 fnp
->physname
= physname
? physname
: "";
9897 fnp
->type
= alloc_type (objfile
);
9898 this_type
= read_type_die (die
, cu
);
9899 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
9901 int nparams
= TYPE_NFIELDS (this_type
);
9903 /* TYPE is the domain of this method, and THIS_TYPE is the type
9904 of the method itself (TYPE_CODE_METHOD). */
9905 smash_to_method_type (fnp
->type
, type
,
9906 TYPE_TARGET_TYPE (this_type
),
9907 TYPE_FIELDS (this_type
),
9908 TYPE_NFIELDS (this_type
),
9909 TYPE_VARARGS (this_type
));
9911 /* Handle static member functions.
9912 Dwarf2 has no clean way to discern C++ static and non-static
9913 member functions. G++ helps GDB by marking the first
9914 parameter for non-static member functions (which is the this
9915 pointer) as artificial. We obtain this information from
9916 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
9917 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
9918 fnp
->voffset
= VOFFSET_STATIC
;
9921 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
9922 dwarf2_full_name (fieldname
, die
, cu
));
9924 /* Get fcontext from DW_AT_containing_type if present. */
9925 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
9926 fnp
->fcontext
= die_containing_type (die
, cu
);
9928 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
9929 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
9931 /* Get accessibility. */
9932 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
9934 accessibility
= DW_UNSND (attr
);
9936 accessibility
= dwarf2_default_access_attribute (die
, cu
);
9937 switch (accessibility
)
9939 case DW_ACCESS_private
:
9940 fnp
->is_private
= 1;
9942 case DW_ACCESS_protected
:
9943 fnp
->is_protected
= 1;
9947 /* Check for artificial methods. */
9948 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
9949 if (attr
&& DW_UNSND (attr
) != 0)
9950 fnp
->is_artificial
= 1;
9952 /* Get index in virtual function table if it is a virtual member
9953 function. For older versions of GCC, this is an offset in the
9954 appropriate virtual table, as specified by DW_AT_containing_type.
9955 For everyone else, it is an expression to be evaluated relative
9956 to the object address. */
9958 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
9961 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
9963 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
9965 /* Old-style GCC. */
9966 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
9968 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
9969 || (DW_BLOCK (attr
)->size
> 1
9970 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
9971 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
9973 struct dwarf_block blk
;
9976 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
9978 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
9979 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
9980 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
9981 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
9982 dwarf2_complex_location_expr_complaint ();
9984 fnp
->voffset
/= cu
->header
.addr_size
;
9988 dwarf2_complex_location_expr_complaint ();
9991 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
9993 else if (attr_form_is_section_offset (attr
))
9995 dwarf2_complex_location_expr_complaint ();
9999 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
10005 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
10006 if (attr
&& DW_UNSND (attr
))
10008 /* GCC does this, as of 2008-08-25; PR debug/37237. */
10009 complaint (&symfile_complaints
,
10010 _("Member function \"%s\" (offset %d) is virtual "
10011 "but the vtable offset is not specified"),
10012 fieldname
, die
->offset
.sect_off
);
10013 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10014 TYPE_CPLUS_DYNAMIC (type
) = 1;
10019 /* Create the vector of member function fields, and attach it to the type. */
10022 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
10023 struct dwarf2_cu
*cu
)
10025 struct fnfieldlist
*flp
;
10028 if (cu
->language
== language_ada
)
10029 error (_("unexpected member functions in Ada type"));
10031 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10032 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
10033 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
10035 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
10037 struct nextfnfield
*nfp
= flp
->head
;
10038 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
10041 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
10042 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
10043 fn_flp
->fn_fields
= (struct fn_field
*)
10044 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
10045 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
10046 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
10049 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
10052 /* Returns non-zero if NAME is the name of a vtable member in CU's
10053 language, zero otherwise. */
10055 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
10057 static const char vptr
[] = "_vptr";
10058 static const char vtable
[] = "vtable";
10060 /* Look for the C++ and Java forms of the vtable. */
10061 if ((cu
->language
== language_java
10062 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
10063 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
10064 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
10070 /* GCC outputs unnamed structures that are really pointers to member
10071 functions, with the ABI-specified layout. If TYPE describes
10072 such a structure, smash it into a member function type.
10074 GCC shouldn't do this; it should just output pointer to member DIEs.
10075 This is GCC PR debug/28767. */
10078 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
10080 struct type
*pfn_type
, *domain_type
, *new_type
;
10082 /* Check for a structure with no name and two children. */
10083 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
10086 /* Check for __pfn and __delta members. */
10087 if (TYPE_FIELD_NAME (type
, 0) == NULL
10088 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
10089 || TYPE_FIELD_NAME (type
, 1) == NULL
10090 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
10093 /* Find the type of the method. */
10094 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
10095 if (pfn_type
== NULL
10096 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
10097 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
10100 /* Look for the "this" argument. */
10101 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
10102 if (TYPE_NFIELDS (pfn_type
) == 0
10103 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
10104 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
10107 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
10108 new_type
= alloc_type (objfile
);
10109 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
10110 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
10111 TYPE_VARARGS (pfn_type
));
10112 smash_to_methodptr_type (type
, new_type
);
10115 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
10119 producer_is_icc (struct dwarf2_cu
*cu
)
10121 if (!cu
->checked_producer
)
10122 check_producer (cu
);
10124 return cu
->producer_is_icc
;
10127 /* Called when we find the DIE that starts a structure or union scope
10128 (definition) to create a type for the structure or union. Fill in
10129 the type's name and general properties; the members will not be
10130 processed until process_structure_type.
10132 NOTE: we need to call these functions regardless of whether or not the
10133 DIE has a DW_AT_name attribute, since it might be an anonymous
10134 structure or union. This gets the type entered into our set of
10135 user defined types.
10137 However, if the structure is incomplete (an opaque struct/union)
10138 then suppress creating a symbol table entry for it since gdb only
10139 wants to find the one with the complete definition. Note that if
10140 it is complete, we just call new_symbol, which does it's own
10141 checking about whether the struct/union is anonymous or not (and
10142 suppresses creating a symbol table entry itself). */
10144 static struct type
*
10145 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10147 struct objfile
*objfile
= cu
->objfile
;
10149 struct attribute
*attr
;
10152 /* If the definition of this type lives in .debug_types, read that type.
10153 Don't follow DW_AT_specification though, that will take us back up
10154 the chain and we want to go down. */
10155 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
10158 struct dwarf2_cu
*type_cu
= cu
;
10159 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
10161 /* We could just recurse on read_structure_type, but we need to call
10162 get_die_type to ensure only one type for this DIE is created.
10163 This is important, for example, because for c++ classes we need
10164 TYPE_NAME set which is only done by new_symbol. Blech. */
10165 type
= read_type_die (type_die
, type_cu
);
10167 /* TYPE_CU may not be the same as CU.
10168 Ensure TYPE is recorded in CU's type_hash table. */
10169 return set_die_type (die
, type
, cu
);
10172 type
= alloc_type (objfile
);
10173 INIT_CPLUS_SPECIFIC (type
);
10175 name
= dwarf2_name (die
, cu
);
10178 if (cu
->language
== language_cplus
10179 || cu
->language
== language_java
)
10181 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
10183 /* dwarf2_full_name might have already finished building the DIE's
10184 type. If so, there is no need to continue. */
10185 if (get_die_type (die
, cu
) != NULL
)
10186 return get_die_type (die
, cu
);
10188 TYPE_TAG_NAME (type
) = full_name
;
10189 if (die
->tag
== DW_TAG_structure_type
10190 || die
->tag
== DW_TAG_class_type
)
10191 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
10195 /* The name is already allocated along with this objfile, so
10196 we don't need to duplicate it for the type. */
10197 TYPE_TAG_NAME (type
) = (char *) name
;
10198 if (die
->tag
== DW_TAG_class_type
)
10199 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
10203 if (die
->tag
== DW_TAG_structure_type
)
10205 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10207 else if (die
->tag
== DW_TAG_union_type
)
10209 TYPE_CODE (type
) = TYPE_CODE_UNION
;
10213 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
10216 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
10217 TYPE_DECLARED_CLASS (type
) = 1;
10219 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10222 TYPE_LENGTH (type
) = DW_UNSND (attr
);
10226 TYPE_LENGTH (type
) = 0;
10229 if (producer_is_icc (cu
))
10231 /* ICC does not output the required DW_AT_declaration
10232 on incomplete types, but gives them a size of zero. */
10235 TYPE_STUB_SUPPORTED (type
) = 1;
10237 if (die_is_declaration (die
, cu
))
10238 TYPE_STUB (type
) = 1;
10239 else if (attr
== NULL
&& die
->child
== NULL
10240 && producer_is_realview (cu
->producer
))
10241 /* RealView does not output the required DW_AT_declaration
10242 on incomplete types. */
10243 TYPE_STUB (type
) = 1;
10245 /* We need to add the type field to the die immediately so we don't
10246 infinitely recurse when dealing with pointers to the structure
10247 type within the structure itself. */
10248 set_die_type (die
, type
, cu
);
10250 /* set_die_type should be already done. */
10251 set_descriptive_type (type
, die
, cu
);
10256 /* Finish creating a structure or union type, including filling in
10257 its members and creating a symbol for it. */
10260 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10262 struct objfile
*objfile
= cu
->objfile
;
10263 struct die_info
*child_die
= die
->child
;
10266 type
= get_die_type (die
, cu
);
10268 type
= read_structure_type (die
, cu
);
10270 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
10272 struct field_info fi
;
10273 struct die_info
*child_die
;
10274 VEC (symbolp
) *template_args
= NULL
;
10275 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
10277 memset (&fi
, 0, sizeof (struct field_info
));
10279 child_die
= die
->child
;
10281 while (child_die
&& child_die
->tag
)
10283 if (child_die
->tag
== DW_TAG_member
10284 || child_die
->tag
== DW_TAG_variable
)
10286 /* NOTE: carlton/2002-11-05: A C++ static data member
10287 should be a DW_TAG_member that is a declaration, but
10288 all versions of G++ as of this writing (so through at
10289 least 3.2.1) incorrectly generate DW_TAG_variable
10290 tags for them instead. */
10291 dwarf2_add_field (&fi
, child_die
, cu
);
10293 else if (child_die
->tag
== DW_TAG_subprogram
)
10295 /* C++ member function. */
10296 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
10298 else if (child_die
->tag
== DW_TAG_inheritance
)
10300 /* C++ base class field. */
10301 dwarf2_add_field (&fi
, child_die
, cu
);
10303 else if (child_die
->tag
== DW_TAG_typedef
)
10304 dwarf2_add_typedef (&fi
, child_die
, cu
);
10305 else if (child_die
->tag
== DW_TAG_template_type_param
10306 || child_die
->tag
== DW_TAG_template_value_param
)
10308 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
10311 VEC_safe_push (symbolp
, template_args
, arg
);
10314 child_die
= sibling_die (child_die
);
10317 /* Attach template arguments to type. */
10318 if (! VEC_empty (symbolp
, template_args
))
10320 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10321 TYPE_N_TEMPLATE_ARGUMENTS (type
)
10322 = VEC_length (symbolp
, template_args
);
10323 TYPE_TEMPLATE_ARGUMENTS (type
)
10324 = obstack_alloc (&objfile
->objfile_obstack
,
10325 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
10326 * sizeof (struct symbol
*)));
10327 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
10328 VEC_address (symbolp
, template_args
),
10329 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
10330 * sizeof (struct symbol
*)));
10331 VEC_free (symbolp
, template_args
);
10334 /* Attach fields and member functions to the type. */
10336 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
10339 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
10341 /* Get the type which refers to the base class (possibly this
10342 class itself) which contains the vtable pointer for the current
10343 class from the DW_AT_containing_type attribute. This use of
10344 DW_AT_containing_type is a GNU extension. */
10346 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
10348 struct type
*t
= die_containing_type (die
, cu
);
10350 TYPE_VPTR_BASETYPE (type
) = t
;
10355 /* Our own class provides vtbl ptr. */
10356 for (i
= TYPE_NFIELDS (t
) - 1;
10357 i
>= TYPE_N_BASECLASSES (t
);
10360 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
10362 if (is_vtable_name (fieldname
, cu
))
10364 TYPE_VPTR_FIELDNO (type
) = i
;
10369 /* Complain if virtual function table field not found. */
10370 if (i
< TYPE_N_BASECLASSES (t
))
10371 complaint (&symfile_complaints
,
10372 _("virtual function table pointer "
10373 "not found when defining class '%s'"),
10374 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
10379 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
10382 else if (cu
->producer
10383 && strncmp (cu
->producer
,
10384 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
10386 /* The IBM XLC compiler does not provide direct indication
10387 of the containing type, but the vtable pointer is
10388 always named __vfp. */
10392 for (i
= TYPE_NFIELDS (type
) - 1;
10393 i
>= TYPE_N_BASECLASSES (type
);
10396 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
10398 TYPE_VPTR_FIELDNO (type
) = i
;
10399 TYPE_VPTR_BASETYPE (type
) = type
;
10406 /* Copy fi.typedef_field_list linked list elements content into the
10407 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
10408 if (fi
.typedef_field_list
)
10410 int i
= fi
.typedef_field_list_count
;
10412 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10413 TYPE_TYPEDEF_FIELD_ARRAY (type
)
10414 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
10415 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
10417 /* Reverse the list order to keep the debug info elements order. */
10420 struct typedef_field
*dest
, *src
;
10422 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
10423 src
= &fi
.typedef_field_list
->field
;
10424 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
10429 do_cleanups (back_to
);
10431 if (HAVE_CPLUS_STRUCT (type
))
10432 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
10435 quirk_gcc_member_function_pointer (type
, objfile
);
10437 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
10438 snapshots) has been known to create a die giving a declaration
10439 for a class that has, as a child, a die giving a definition for a
10440 nested class. So we have to process our children even if the
10441 current die is a declaration. Normally, of course, a declaration
10442 won't have any children at all. */
10444 while (child_die
!= NULL
&& child_die
->tag
)
10446 if (child_die
->tag
== DW_TAG_member
10447 || child_die
->tag
== DW_TAG_variable
10448 || child_die
->tag
== DW_TAG_inheritance
10449 || child_die
->tag
== DW_TAG_template_value_param
10450 || child_die
->tag
== DW_TAG_template_type_param
)
10455 process_die (child_die
, cu
);
10457 child_die
= sibling_die (child_die
);
10460 /* Do not consider external references. According to the DWARF standard,
10461 these DIEs are identified by the fact that they have no byte_size
10462 attribute, and a declaration attribute. */
10463 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
10464 || !die_is_declaration (die
, cu
))
10465 new_symbol (die
, type
, cu
);
10468 /* Given a DW_AT_enumeration_type die, set its type. We do not
10469 complete the type's fields yet, or create any symbols. */
10471 static struct type
*
10472 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10474 struct objfile
*objfile
= cu
->objfile
;
10476 struct attribute
*attr
;
10479 /* If the definition of this type lives in .debug_types, read that type.
10480 Don't follow DW_AT_specification though, that will take us back up
10481 the chain and we want to go down. */
10482 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
10485 struct dwarf2_cu
*type_cu
= cu
;
10486 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
10488 type
= read_type_die (type_die
, type_cu
);
10490 /* TYPE_CU may not be the same as CU.
10491 Ensure TYPE is recorded in CU's type_hash table. */
10492 return set_die_type (die
, type
, cu
);
10495 type
= alloc_type (objfile
);
10497 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
10498 name
= dwarf2_full_name (NULL
, die
, cu
);
10500 TYPE_TAG_NAME (type
) = (char *) name
;
10502 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10505 TYPE_LENGTH (type
) = DW_UNSND (attr
);
10509 TYPE_LENGTH (type
) = 0;
10512 /* The enumeration DIE can be incomplete. In Ada, any type can be
10513 declared as private in the package spec, and then defined only
10514 inside the package body. Such types are known as Taft Amendment
10515 Types. When another package uses such a type, an incomplete DIE
10516 may be generated by the compiler. */
10517 if (die_is_declaration (die
, cu
))
10518 TYPE_STUB (type
) = 1;
10520 return set_die_type (die
, type
, cu
);
10523 /* Given a pointer to a die which begins an enumeration, process all
10524 the dies that define the members of the enumeration, and create the
10525 symbol for the enumeration type.
10527 NOTE: We reverse the order of the element list. */
10530 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10532 struct type
*this_type
;
10534 this_type
= get_die_type (die
, cu
);
10535 if (this_type
== NULL
)
10536 this_type
= read_enumeration_type (die
, cu
);
10538 if (die
->child
!= NULL
)
10540 struct die_info
*child_die
;
10541 struct symbol
*sym
;
10542 struct field
*fields
= NULL
;
10543 int num_fields
= 0;
10544 int unsigned_enum
= 1;
10549 child_die
= die
->child
;
10550 while (child_die
&& child_die
->tag
)
10552 if (child_die
->tag
!= DW_TAG_enumerator
)
10554 process_die (child_die
, cu
);
10558 name
= dwarf2_name (child_die
, cu
);
10561 sym
= new_symbol (child_die
, this_type
, cu
);
10562 if (SYMBOL_VALUE (sym
) < 0)
10567 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
10570 mask
|= SYMBOL_VALUE (sym
);
10572 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
10574 fields
= (struct field
*)
10576 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
10577 * sizeof (struct field
));
10580 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
10581 FIELD_TYPE (fields
[num_fields
]) = NULL
;
10582 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
10583 FIELD_BITSIZE (fields
[num_fields
]) = 0;
10589 child_die
= sibling_die (child_die
);
10594 TYPE_NFIELDS (this_type
) = num_fields
;
10595 TYPE_FIELDS (this_type
) = (struct field
*)
10596 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
10597 memcpy (TYPE_FIELDS (this_type
), fields
,
10598 sizeof (struct field
) * num_fields
);
10602 TYPE_UNSIGNED (this_type
) = 1;
10604 TYPE_FLAG_ENUM (this_type
) = 1;
10607 /* If we are reading an enum from a .debug_types unit, and the enum
10608 is a declaration, and the enum is not the signatured type in the
10609 unit, then we do not want to add a symbol for it. Adding a
10610 symbol would in some cases obscure the true definition of the
10611 enum, giving users an incomplete type when the definition is
10612 actually available. Note that we do not want to do this for all
10613 enums which are just declarations, because C++0x allows forward
10614 enum declarations. */
10615 if (cu
->per_cu
->is_debug_types
10616 && die_is_declaration (die
, cu
))
10618 struct signatured_type
*sig_type
;
10621 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
10622 cu
->per_cu
->info_or_types_section
,
10623 cu
->per_cu
->offset
);
10624 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
10625 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
10629 new_symbol (die
, this_type
, cu
);
10632 /* Extract all information from a DW_TAG_array_type DIE and put it in
10633 the DIE's type field. For now, this only handles one dimensional
10636 static struct type
*
10637 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10639 struct objfile
*objfile
= cu
->objfile
;
10640 struct die_info
*child_die
;
10642 struct type
*element_type
, *range_type
, *index_type
;
10643 struct type
**range_types
= NULL
;
10644 struct attribute
*attr
;
10646 struct cleanup
*back_to
;
10649 element_type
= die_type (die
, cu
);
10651 /* The die_type call above may have already set the type for this DIE. */
10652 type
= get_die_type (die
, cu
);
10656 /* Irix 6.2 native cc creates array types without children for
10657 arrays with unspecified length. */
10658 if (die
->child
== NULL
)
10660 index_type
= objfile_type (objfile
)->builtin_int
;
10661 range_type
= create_range_type (NULL
, index_type
, 0, -1);
10662 type
= create_array_type (NULL
, element_type
, range_type
);
10663 return set_die_type (die
, type
, cu
);
10666 back_to
= make_cleanup (null_cleanup
, NULL
);
10667 child_die
= die
->child
;
10668 while (child_die
&& child_die
->tag
)
10670 if (child_die
->tag
== DW_TAG_subrange_type
)
10672 struct type
*child_type
= read_type_die (child_die
, cu
);
10674 if (child_type
!= NULL
)
10676 /* The range type was succesfully read. Save it for the
10677 array type creation. */
10678 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
10680 range_types
= (struct type
**)
10681 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
10682 * sizeof (struct type
*));
10684 make_cleanup (free_current_contents
, &range_types
);
10686 range_types
[ndim
++] = child_type
;
10689 child_die
= sibling_die (child_die
);
10692 /* Dwarf2 dimensions are output from left to right, create the
10693 necessary array types in backwards order. */
10695 type
= element_type
;
10697 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
10702 type
= create_array_type (NULL
, type
, range_types
[i
++]);
10707 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
10710 /* Understand Dwarf2 support for vector types (like they occur on
10711 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
10712 array type. This is not part of the Dwarf2/3 standard yet, but a
10713 custom vendor extension. The main difference between a regular
10714 array and the vector variant is that vectors are passed by value
10716 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
10718 make_vector_type (type
);
10720 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
10721 implementation may choose to implement triple vectors using this
10723 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10726 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
10727 TYPE_LENGTH (type
) = DW_UNSND (attr
);
10729 complaint (&symfile_complaints
,
10730 _("DW_AT_byte_size for array type smaller "
10731 "than the total size of elements"));
10734 name
= dwarf2_name (die
, cu
);
10736 TYPE_NAME (type
) = name
;
10738 /* Install the type in the die. */
10739 set_die_type (die
, type
, cu
);
10741 /* set_die_type should be already done. */
10742 set_descriptive_type (type
, die
, cu
);
10744 do_cleanups (back_to
);
10749 static enum dwarf_array_dim_ordering
10750 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
10752 struct attribute
*attr
;
10754 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
10756 if (attr
) return DW_SND (attr
);
10758 /* GNU F77 is a special case, as at 08/2004 array type info is the
10759 opposite order to the dwarf2 specification, but data is still
10760 laid out as per normal fortran.
10762 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
10763 version checking. */
10765 if (cu
->language
== language_fortran
10766 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
10768 return DW_ORD_row_major
;
10771 switch (cu
->language_defn
->la_array_ordering
)
10773 case array_column_major
:
10774 return DW_ORD_col_major
;
10775 case array_row_major
:
10777 return DW_ORD_row_major
;
10781 /* Extract all information from a DW_TAG_set_type DIE and put it in
10782 the DIE's type field. */
10784 static struct type
*
10785 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10787 struct type
*domain_type
, *set_type
;
10788 struct attribute
*attr
;
10790 domain_type
= die_type (die
, cu
);
10792 /* The die_type call above may have already set the type for this DIE. */
10793 set_type
= get_die_type (die
, cu
);
10797 set_type
= create_set_type (NULL
, domain_type
);
10799 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10801 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
10803 return set_die_type (die
, set_type
, cu
);
10806 /* First cut: install each common block member as a global variable. */
10809 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
10811 struct die_info
*child_die
;
10812 struct attribute
*attr
;
10813 struct symbol
*sym
;
10814 CORE_ADDR base
= (CORE_ADDR
) 0;
10816 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10819 /* Support the .debug_loc offsets. */
10820 if (attr_form_is_block (attr
))
10822 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
10824 else if (attr_form_is_section_offset (attr
))
10826 dwarf2_complex_location_expr_complaint ();
10830 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
10831 "common block member");
10834 if (die
->child
!= NULL
)
10836 child_die
= die
->child
;
10837 while (child_die
&& child_die
->tag
)
10841 sym
= new_symbol (child_die
, NULL
, cu
);
10843 && handle_data_member_location (child_die
, cu
, &offset
))
10845 SYMBOL_VALUE_ADDRESS (sym
) = base
+ offset
;
10846 add_symbol_to_list (sym
, &global_symbols
);
10848 child_die
= sibling_die (child_die
);
10853 /* Create a type for a C++ namespace. */
10855 static struct type
*
10856 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10858 struct objfile
*objfile
= cu
->objfile
;
10859 const char *previous_prefix
, *name
;
10863 /* For extensions, reuse the type of the original namespace. */
10864 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
10866 struct die_info
*ext_die
;
10867 struct dwarf2_cu
*ext_cu
= cu
;
10869 ext_die
= dwarf2_extension (die
, &ext_cu
);
10870 type
= read_type_die (ext_die
, ext_cu
);
10872 /* EXT_CU may not be the same as CU.
10873 Ensure TYPE is recorded in CU's type_hash table. */
10874 return set_die_type (die
, type
, cu
);
10877 name
= namespace_name (die
, &is_anonymous
, cu
);
10879 /* Now build the name of the current namespace. */
10881 previous_prefix
= determine_prefix (die
, cu
);
10882 if (previous_prefix
[0] != '\0')
10883 name
= typename_concat (&objfile
->objfile_obstack
,
10884 previous_prefix
, name
, 0, cu
);
10886 /* Create the type. */
10887 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
10889 TYPE_NAME (type
) = (char *) name
;
10890 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
10892 return set_die_type (die
, type
, cu
);
10895 /* Read a C++ namespace. */
10898 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10900 struct objfile
*objfile
= cu
->objfile
;
10903 /* Add a symbol associated to this if we haven't seen the namespace
10904 before. Also, add a using directive if it's an anonymous
10907 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
10911 type
= read_type_die (die
, cu
);
10912 new_symbol (die
, type
, cu
);
10914 namespace_name (die
, &is_anonymous
, cu
);
10917 const char *previous_prefix
= determine_prefix (die
, cu
);
10919 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
10920 NULL
, NULL
, &objfile
->objfile_obstack
);
10924 if (die
->child
!= NULL
)
10926 struct die_info
*child_die
= die
->child
;
10928 while (child_die
&& child_die
->tag
)
10930 process_die (child_die
, cu
);
10931 child_die
= sibling_die (child_die
);
10936 /* Read a Fortran module as type. This DIE can be only a declaration used for
10937 imported module. Still we need that type as local Fortran "use ... only"
10938 declaration imports depend on the created type in determine_prefix. */
10940 static struct type
*
10941 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10943 struct objfile
*objfile
= cu
->objfile
;
10947 module_name
= dwarf2_name (die
, cu
);
10949 complaint (&symfile_complaints
,
10950 _("DW_TAG_module has no name, offset 0x%x"),
10951 die
->offset
.sect_off
);
10952 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
10954 /* determine_prefix uses TYPE_TAG_NAME. */
10955 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
10957 return set_die_type (die
, type
, cu
);
10960 /* Read a Fortran module. */
10963 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
10965 struct die_info
*child_die
= die
->child
;
10967 while (child_die
&& child_die
->tag
)
10969 process_die (child_die
, cu
);
10970 child_die
= sibling_die (child_die
);
10974 /* Return the name of the namespace represented by DIE. Set
10975 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
10978 static const char *
10979 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
10981 struct die_info
*current_die
;
10982 const char *name
= NULL
;
10984 /* Loop through the extensions until we find a name. */
10986 for (current_die
= die
;
10987 current_die
!= NULL
;
10988 current_die
= dwarf2_extension (die
, &cu
))
10990 name
= dwarf2_name (current_die
, cu
);
10995 /* Is it an anonymous namespace? */
10997 *is_anonymous
= (name
== NULL
);
10999 name
= CP_ANONYMOUS_NAMESPACE_STR
;
11004 /* Extract all information from a DW_TAG_pointer_type DIE and add to
11005 the user defined type vector. */
11007 static struct type
*
11008 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11010 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
11011 struct comp_unit_head
*cu_header
= &cu
->header
;
11013 struct attribute
*attr_byte_size
;
11014 struct attribute
*attr_address_class
;
11015 int byte_size
, addr_class
;
11016 struct type
*target_type
;
11018 target_type
= die_type (die
, cu
);
11020 /* The die_type call above may have already set the type for this DIE. */
11021 type
= get_die_type (die
, cu
);
11025 type
= lookup_pointer_type (target_type
);
11027 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11028 if (attr_byte_size
)
11029 byte_size
= DW_UNSND (attr_byte_size
);
11031 byte_size
= cu_header
->addr_size
;
11033 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
11034 if (attr_address_class
)
11035 addr_class
= DW_UNSND (attr_address_class
);
11037 addr_class
= DW_ADDR_none
;
11039 /* If the pointer size or address class is different than the
11040 default, create a type variant marked as such and set the
11041 length accordingly. */
11042 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
11044 if (gdbarch_address_class_type_flags_p (gdbarch
))
11048 type_flags
= gdbarch_address_class_type_flags
11049 (gdbarch
, byte_size
, addr_class
);
11050 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
11052 type
= make_type_with_address_space (type
, type_flags
);
11054 else if (TYPE_LENGTH (type
) != byte_size
)
11056 complaint (&symfile_complaints
,
11057 _("invalid pointer size %d"), byte_size
);
11061 /* Should we also complain about unhandled address classes? */
11065 TYPE_LENGTH (type
) = byte_size
;
11066 return set_die_type (die
, type
, cu
);
11069 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
11070 the user defined type vector. */
11072 static struct type
*
11073 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11076 struct type
*to_type
;
11077 struct type
*domain
;
11079 to_type
= die_type (die
, cu
);
11080 domain
= die_containing_type (die
, cu
);
11082 /* The calls above may have already set the type for this DIE. */
11083 type
= get_die_type (die
, cu
);
11087 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
11088 type
= lookup_methodptr_type (to_type
);
11090 type
= lookup_memberptr_type (to_type
, domain
);
11092 return set_die_type (die
, type
, cu
);
11095 /* Extract all information from a DW_TAG_reference_type DIE and add to
11096 the user defined type vector. */
11098 static struct type
*
11099 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11101 struct comp_unit_head
*cu_header
= &cu
->header
;
11102 struct type
*type
, *target_type
;
11103 struct attribute
*attr
;
11105 target_type
= die_type (die
, cu
);
11107 /* The die_type call above may have already set the type for this DIE. */
11108 type
= get_die_type (die
, cu
);
11112 type
= lookup_reference_type (target_type
);
11113 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11116 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11120 TYPE_LENGTH (type
) = cu_header
->addr_size
;
11122 return set_die_type (die
, type
, cu
);
11125 static struct type
*
11126 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11128 struct type
*base_type
, *cv_type
;
11130 base_type
= die_type (die
, cu
);
11132 /* The die_type call above may have already set the type for this DIE. */
11133 cv_type
= get_die_type (die
, cu
);
11137 /* In case the const qualifier is applied to an array type, the element type
11138 is so qualified, not the array type (section 6.7.3 of C99). */
11139 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
11141 struct type
*el_type
, *inner_array
;
11143 base_type
= copy_type (base_type
);
11144 inner_array
= base_type
;
11146 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
11148 TYPE_TARGET_TYPE (inner_array
) =
11149 copy_type (TYPE_TARGET_TYPE (inner_array
));
11150 inner_array
= TYPE_TARGET_TYPE (inner_array
);
11153 el_type
= TYPE_TARGET_TYPE (inner_array
);
11154 TYPE_TARGET_TYPE (inner_array
) =
11155 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
11157 return set_die_type (die
, base_type
, cu
);
11160 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
11161 return set_die_type (die
, cv_type
, cu
);
11164 static struct type
*
11165 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11167 struct type
*base_type
, *cv_type
;
11169 base_type
= die_type (die
, cu
);
11171 /* The die_type call above may have already set the type for this DIE. */
11172 cv_type
= get_die_type (die
, cu
);
11176 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
11177 return set_die_type (die
, cv_type
, cu
);
11180 /* Extract all information from a DW_TAG_string_type DIE and add to
11181 the user defined type vector. It isn't really a user defined type,
11182 but it behaves like one, with other DIE's using an AT_user_def_type
11183 attribute to reference it. */
11185 static struct type
*
11186 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11188 struct objfile
*objfile
= cu
->objfile
;
11189 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11190 struct type
*type
, *range_type
, *index_type
, *char_type
;
11191 struct attribute
*attr
;
11192 unsigned int length
;
11194 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
11197 length
= DW_UNSND (attr
);
11201 /* Check for the DW_AT_byte_size attribute. */
11202 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11205 length
= DW_UNSND (attr
);
11213 index_type
= objfile_type (objfile
)->builtin_int
;
11214 range_type
= create_range_type (NULL
, index_type
, 1, length
);
11215 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
11216 type
= create_string_type (NULL
, char_type
, range_type
);
11218 return set_die_type (die
, type
, cu
);
11221 /* Handle DIES due to C code like:
11225 int (*funcp)(int a, long l);
11229 ('funcp' generates a DW_TAG_subroutine_type DIE). */
11231 static struct type
*
11232 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11234 struct objfile
*objfile
= cu
->objfile
;
11235 struct type
*type
; /* Type that this function returns. */
11236 struct type
*ftype
; /* Function that returns above type. */
11237 struct attribute
*attr
;
11239 type
= die_type (die
, cu
);
11241 /* The die_type call above may have already set the type for this DIE. */
11242 ftype
= get_die_type (die
, cu
);
11246 ftype
= lookup_function_type (type
);
11248 /* All functions in C++, Pascal and Java have prototypes. */
11249 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
11250 if ((attr
&& (DW_UNSND (attr
) != 0))
11251 || cu
->language
== language_cplus
11252 || cu
->language
== language_java
11253 || cu
->language
== language_pascal
)
11254 TYPE_PROTOTYPED (ftype
) = 1;
11255 else if (producer_is_realview (cu
->producer
))
11256 /* RealView does not emit DW_AT_prototyped. We can not
11257 distinguish prototyped and unprototyped functions; default to
11258 prototyped, since that is more common in modern code (and
11259 RealView warns about unprototyped functions). */
11260 TYPE_PROTOTYPED (ftype
) = 1;
11262 /* Store the calling convention in the type if it's available in
11263 the subroutine die. Otherwise set the calling convention to
11264 the default value DW_CC_normal. */
11265 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
11267 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
11268 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
11269 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
11271 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
11273 /* We need to add the subroutine type to the die immediately so
11274 we don't infinitely recurse when dealing with parameters
11275 declared as the same subroutine type. */
11276 set_die_type (die
, ftype
, cu
);
11278 if (die
->child
!= NULL
)
11280 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
11281 struct die_info
*child_die
;
11282 int nparams
, iparams
;
11284 /* Count the number of parameters.
11285 FIXME: GDB currently ignores vararg functions, but knows about
11286 vararg member functions. */
11288 child_die
= die
->child
;
11289 while (child_die
&& child_die
->tag
)
11291 if (child_die
->tag
== DW_TAG_formal_parameter
)
11293 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
11294 TYPE_VARARGS (ftype
) = 1;
11295 child_die
= sibling_die (child_die
);
11298 /* Allocate storage for parameters and fill them in. */
11299 TYPE_NFIELDS (ftype
) = nparams
;
11300 TYPE_FIELDS (ftype
) = (struct field
*)
11301 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
11303 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
11304 even if we error out during the parameters reading below. */
11305 for (iparams
= 0; iparams
< nparams
; iparams
++)
11306 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
11309 child_die
= die
->child
;
11310 while (child_die
&& child_die
->tag
)
11312 if (child_die
->tag
== DW_TAG_formal_parameter
)
11314 struct type
*arg_type
;
11316 /* DWARF version 2 has no clean way to discern C++
11317 static and non-static member functions. G++ helps
11318 GDB by marking the first parameter for non-static
11319 member functions (which is the this pointer) as
11320 artificial. We pass this information to
11321 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
11323 DWARF version 3 added DW_AT_object_pointer, which GCC
11324 4.5 does not yet generate. */
11325 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
11327 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
11330 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
11332 /* GCC/43521: In java, the formal parameter
11333 "this" is sometimes not marked with DW_AT_artificial. */
11334 if (cu
->language
== language_java
)
11336 const char *name
= dwarf2_name (child_die
, cu
);
11338 if (name
&& !strcmp (name
, "this"))
11339 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
11342 arg_type
= die_type (child_die
, cu
);
11344 /* RealView does not mark THIS as const, which the testsuite
11345 expects. GCC marks THIS as const in method definitions,
11346 but not in the class specifications (GCC PR 43053). */
11347 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
11348 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
11351 struct dwarf2_cu
*arg_cu
= cu
;
11352 const char *name
= dwarf2_name (child_die
, cu
);
11354 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
11357 /* If the compiler emits this, use it. */
11358 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
11361 else if (name
&& strcmp (name
, "this") == 0)
11362 /* Function definitions will have the argument names. */
11364 else if (name
== NULL
&& iparams
== 0)
11365 /* Declarations may not have the names, so like
11366 elsewhere in GDB, assume an artificial first
11367 argument is "this". */
11371 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
11375 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
11378 child_die
= sibling_die (child_die
);
11385 static struct type
*
11386 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
11388 struct objfile
*objfile
= cu
->objfile
;
11389 const char *name
= NULL
;
11390 struct type
*this_type
, *target_type
;
11392 name
= dwarf2_full_name (NULL
, die
, cu
);
11393 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
11394 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
11395 TYPE_NAME (this_type
) = (char *) name
;
11396 set_die_type (die
, this_type
, cu
);
11397 target_type
= die_type (die
, cu
);
11398 if (target_type
!= this_type
)
11399 TYPE_TARGET_TYPE (this_type
) = target_type
;
11402 /* Self-referential typedefs are, it seems, not allowed by the DWARF
11403 spec and cause infinite loops in GDB. */
11404 complaint (&symfile_complaints
,
11405 _("Self-referential DW_TAG_typedef "
11406 "- DIE at 0x%x [in module %s]"),
11407 die
->offset
.sect_off
, objfile
->name
);
11408 TYPE_TARGET_TYPE (this_type
) = NULL
;
11413 /* Find a representation of a given base type and install
11414 it in the TYPE field of the die. */
11416 static struct type
*
11417 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11419 struct objfile
*objfile
= cu
->objfile
;
11421 struct attribute
*attr
;
11422 int encoding
= 0, size
= 0;
11424 enum type_code code
= TYPE_CODE_INT
;
11425 int type_flags
= 0;
11426 struct type
*target_type
= NULL
;
11428 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
11431 encoding
= DW_UNSND (attr
);
11433 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11436 size
= DW_UNSND (attr
);
11438 name
= dwarf2_name (die
, cu
);
11441 complaint (&symfile_complaints
,
11442 _("DW_AT_name missing from DW_TAG_base_type"));
11447 case DW_ATE_address
:
11448 /* Turn DW_ATE_address into a void * pointer. */
11449 code
= TYPE_CODE_PTR
;
11450 type_flags
|= TYPE_FLAG_UNSIGNED
;
11451 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
11453 case DW_ATE_boolean
:
11454 code
= TYPE_CODE_BOOL
;
11455 type_flags
|= TYPE_FLAG_UNSIGNED
;
11457 case DW_ATE_complex_float
:
11458 code
= TYPE_CODE_COMPLEX
;
11459 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
11461 case DW_ATE_decimal_float
:
11462 code
= TYPE_CODE_DECFLOAT
;
11465 code
= TYPE_CODE_FLT
;
11467 case DW_ATE_signed
:
11469 case DW_ATE_unsigned
:
11470 type_flags
|= TYPE_FLAG_UNSIGNED
;
11471 if (cu
->language
== language_fortran
11473 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
11474 code
= TYPE_CODE_CHAR
;
11476 case DW_ATE_signed_char
:
11477 if (cu
->language
== language_ada
|| cu
->language
== language_m2
11478 || cu
->language
== language_pascal
11479 || cu
->language
== language_fortran
)
11480 code
= TYPE_CODE_CHAR
;
11482 case DW_ATE_unsigned_char
:
11483 if (cu
->language
== language_ada
|| cu
->language
== language_m2
11484 || cu
->language
== language_pascal
11485 || cu
->language
== language_fortran
)
11486 code
= TYPE_CODE_CHAR
;
11487 type_flags
|= TYPE_FLAG_UNSIGNED
;
11490 /* We just treat this as an integer and then recognize the
11491 type by name elsewhere. */
11495 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
11496 dwarf_type_encoding_name (encoding
));
11500 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
11501 TYPE_NAME (type
) = name
;
11502 TYPE_TARGET_TYPE (type
) = target_type
;
11504 if (name
&& strcmp (name
, "char") == 0)
11505 TYPE_NOSIGN (type
) = 1;
11507 return set_die_type (die
, type
, cu
);
11510 /* Read the given DW_AT_subrange DIE. */
11512 static struct type
*
11513 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11515 struct type
*base_type
;
11516 struct type
*range_type
;
11517 struct attribute
*attr
;
11519 int low_default_is_valid
;
11521 LONGEST negative_mask
;
11523 base_type
= die_type (die
, cu
);
11524 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
11525 check_typedef (base_type
);
11527 /* The die_type call above may have already set the type for this DIE. */
11528 range_type
= get_die_type (die
, cu
);
11532 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
11533 omitting DW_AT_lower_bound. */
11534 switch (cu
->language
)
11537 case language_cplus
:
11539 low_default_is_valid
= 1;
11541 case language_fortran
:
11543 low_default_is_valid
= 1;
11546 case language_java
:
11547 case language_objc
:
11549 low_default_is_valid
= (cu
->header
.version
>= 4);
11553 case language_pascal
:
11555 low_default_is_valid
= (cu
->header
.version
>= 4);
11559 low_default_is_valid
= 0;
11563 /* FIXME: For variable sized arrays either of these could be
11564 a variable rather than a constant value. We'll allow it,
11565 but we don't know how to handle it. */
11566 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
11568 low
= dwarf2_get_attr_constant_value (attr
, low
);
11569 else if (!low_default_is_valid
)
11570 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
11571 "- DIE at 0x%x [in module %s]"),
11572 die
->offset
.sect_off
, cu
->objfile
->name
);
11574 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
11577 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
11579 /* GCC encodes arrays with unspecified or dynamic length
11580 with a DW_FORM_block1 attribute or a reference attribute.
11581 FIXME: GDB does not yet know how to handle dynamic
11582 arrays properly, treat them as arrays with unspecified
11585 FIXME: jimb/2003-09-22: GDB does not really know
11586 how to handle arrays of unspecified length
11587 either; we just represent them as zero-length
11588 arrays. Choose an appropriate upper bound given
11589 the lower bound we've computed above. */
11593 high
= dwarf2_get_attr_constant_value (attr
, 1);
11597 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
11600 int count
= dwarf2_get_attr_constant_value (attr
, 1);
11601 high
= low
+ count
- 1;
11605 /* Unspecified array length. */
11610 /* Dwarf-2 specifications explicitly allows to create subrange types
11611 without specifying a base type.
11612 In that case, the base type must be set to the type of
11613 the lower bound, upper bound or count, in that order, if any of these
11614 three attributes references an object that has a type.
11615 If no base type is found, the Dwarf-2 specifications say that
11616 a signed integer type of size equal to the size of an address should
11618 For the following C code: `extern char gdb_int [];'
11619 GCC produces an empty range DIE.
11620 FIXME: muller/2010-05-28: Possible references to object for low bound,
11621 high bound or count are not yet handled by this code. */
11622 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
11624 struct objfile
*objfile
= cu
->objfile
;
11625 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11626 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
11627 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
11629 /* Test "int", "long int", and "long long int" objfile types,
11630 and select the first one having a size above or equal to the
11631 architecture address size. */
11632 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
11633 base_type
= int_type
;
11636 int_type
= objfile_type (objfile
)->builtin_long
;
11637 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
11638 base_type
= int_type
;
11641 int_type
= objfile_type (objfile
)->builtin_long_long
;
11642 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
11643 base_type
= int_type
;
11649 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
11650 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
11651 low
|= negative_mask
;
11652 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
11653 high
|= negative_mask
;
11655 range_type
= create_range_type (NULL
, base_type
, low
, high
);
11657 /* Mark arrays with dynamic length at least as an array of unspecified
11658 length. GDB could check the boundary but before it gets implemented at
11659 least allow accessing the array elements. */
11660 if (attr
&& attr_form_is_block (attr
))
11661 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
11663 /* Ada expects an empty array on no boundary attributes. */
11664 if (attr
== NULL
&& cu
->language
!= language_ada
)
11665 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
11667 name
= dwarf2_name (die
, cu
);
11669 TYPE_NAME (range_type
) = name
;
11671 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11673 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
11675 set_die_type (die
, range_type
, cu
);
11677 /* set_die_type should be already done. */
11678 set_descriptive_type (range_type
, die
, cu
);
11683 static struct type
*
11684 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11688 /* For now, we only support the C meaning of an unspecified type: void. */
11690 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
11691 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
11693 return set_die_type (die
, type
, cu
);
11696 /* Read a single die and all its descendents. Set the die's sibling
11697 field to NULL; set other fields in the die correctly, and set all
11698 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
11699 location of the info_ptr after reading all of those dies. PARENT
11700 is the parent of the die in question. */
11702 static struct die_info
*
11703 read_die_and_children (const struct die_reader_specs
*reader
,
11704 gdb_byte
*info_ptr
,
11705 gdb_byte
**new_info_ptr
,
11706 struct die_info
*parent
)
11708 struct die_info
*die
;
11712 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
11715 *new_info_ptr
= cur_ptr
;
11718 store_in_ref_table (die
, reader
->cu
);
11721 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
11725 *new_info_ptr
= cur_ptr
;
11728 die
->sibling
= NULL
;
11729 die
->parent
= parent
;
11733 /* Read a die, all of its descendents, and all of its siblings; set
11734 all of the fields of all of the dies correctly. Arguments are as
11735 in read_die_and_children. */
11737 static struct die_info
*
11738 read_die_and_siblings (const struct die_reader_specs
*reader
,
11739 gdb_byte
*info_ptr
,
11740 gdb_byte
**new_info_ptr
,
11741 struct die_info
*parent
)
11743 struct die_info
*first_die
, *last_sibling
;
11746 cur_ptr
= info_ptr
;
11747 first_die
= last_sibling
= NULL
;
11751 struct die_info
*die
11752 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
11756 *new_info_ptr
= cur_ptr
;
11763 last_sibling
->sibling
= die
;
11765 last_sibling
= die
;
11769 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
11771 The caller is responsible for filling in the extra attributes
11772 and updating (*DIEP)->num_attrs.
11773 Set DIEP to point to a newly allocated die with its information,
11774 except for its child, sibling, and parent fields.
11775 Set HAS_CHILDREN to tell whether the die has children or not. */
11778 read_full_die_1 (const struct die_reader_specs
*reader
,
11779 struct die_info
**diep
, gdb_byte
*info_ptr
,
11780 int *has_children
, int num_extra_attrs
)
11782 unsigned int abbrev_number
, bytes_read
, i
;
11783 sect_offset offset
;
11784 struct abbrev_info
*abbrev
;
11785 struct die_info
*die
;
11786 struct dwarf2_cu
*cu
= reader
->cu
;
11787 bfd
*abfd
= reader
->abfd
;
11789 offset
.sect_off
= info_ptr
- reader
->buffer
;
11790 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
11791 info_ptr
+= bytes_read
;
11792 if (!abbrev_number
)
11799 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
11801 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
11803 bfd_get_filename (abfd
));
11805 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
11806 die
->offset
= offset
;
11807 die
->tag
= abbrev
->tag
;
11808 die
->abbrev
= abbrev_number
;
11810 /* Make the result usable.
11811 The caller needs to update num_attrs after adding the extra
11813 die
->num_attrs
= abbrev
->num_attrs
;
11815 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
11816 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
11820 *has_children
= abbrev
->has_children
;
11824 /* Read a die and all its attributes.
11825 Set DIEP to point to a newly allocated die with its information,
11826 except for its child, sibling, and parent fields.
11827 Set HAS_CHILDREN to tell whether the die has children or not. */
11830 read_full_die (const struct die_reader_specs
*reader
,
11831 struct die_info
**diep
, gdb_byte
*info_ptr
,
11834 return read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
11837 /* Abbreviation tables.
11839 In DWARF version 2, the description of the debugging information is
11840 stored in a separate .debug_abbrev section. Before we read any
11841 dies from a section we read in all abbreviations and install them
11842 in a hash table. */
11844 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
11846 static struct abbrev_info
*
11847 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
11849 struct abbrev_info
*abbrev
;
11851 abbrev
= (struct abbrev_info
*)
11852 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
11853 memset (abbrev
, 0, sizeof (struct abbrev_info
));
11857 /* Add an abbreviation to the table. */
11860 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
11861 unsigned int abbrev_number
,
11862 struct abbrev_info
*abbrev
)
11864 unsigned int hash_number
;
11866 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
11867 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
11868 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
11871 /* Look up an abbrev in the table.
11872 Returns NULL if the abbrev is not found. */
11874 static struct abbrev_info
*
11875 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
11876 unsigned int abbrev_number
)
11878 unsigned int hash_number
;
11879 struct abbrev_info
*abbrev
;
11881 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
11882 abbrev
= abbrev_table
->abbrevs
[hash_number
];
11886 if (abbrev
->number
== abbrev_number
)
11888 abbrev
= abbrev
->next
;
11893 /* Read in an abbrev table. */
11895 static struct abbrev_table
*
11896 abbrev_table_read_table (struct dwarf2_section_info
*section
,
11897 sect_offset offset
)
11899 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11900 bfd
*abfd
= section
->asection
->owner
;
11901 struct abbrev_table
*abbrev_table
;
11902 gdb_byte
*abbrev_ptr
;
11903 struct abbrev_info
*cur_abbrev
;
11904 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
11905 unsigned int abbrev_form
;
11906 struct attr_abbrev
*cur_attrs
;
11907 unsigned int allocated_attrs
;
11909 abbrev_table
= XMALLOC (struct abbrev_table
);
11910 abbrev_table
->offset
= offset
;
11911 obstack_init (&abbrev_table
->abbrev_obstack
);
11912 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
11914 * sizeof (struct abbrev_info
*)));
11915 memset (abbrev_table
->abbrevs
, 0,
11916 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
11918 dwarf2_read_section (objfile
, section
);
11919 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
11920 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
11921 abbrev_ptr
+= bytes_read
;
11923 allocated_attrs
= ATTR_ALLOC_CHUNK
;
11924 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
11926 /* Loop until we reach an abbrev number of 0. */
11927 while (abbrev_number
)
11929 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
11931 /* read in abbrev header */
11932 cur_abbrev
->number
= abbrev_number
;
11933 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
11934 abbrev_ptr
+= bytes_read
;
11935 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
11938 /* now read in declarations */
11939 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
11940 abbrev_ptr
+= bytes_read
;
11941 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
11942 abbrev_ptr
+= bytes_read
;
11943 while (abbrev_name
)
11945 if (cur_abbrev
->num_attrs
== allocated_attrs
)
11947 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
11949 = xrealloc (cur_attrs
, (allocated_attrs
11950 * sizeof (struct attr_abbrev
)));
11953 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
11954 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
11955 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
11956 abbrev_ptr
+= bytes_read
;
11957 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
11958 abbrev_ptr
+= bytes_read
;
11961 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
11962 (cur_abbrev
->num_attrs
11963 * sizeof (struct attr_abbrev
)));
11964 memcpy (cur_abbrev
->attrs
, cur_attrs
,
11965 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
11967 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
11969 /* Get next abbreviation.
11970 Under Irix6 the abbreviations for a compilation unit are not
11971 always properly terminated with an abbrev number of 0.
11972 Exit loop if we encounter an abbreviation which we have
11973 already read (which means we are about to read the abbreviations
11974 for the next compile unit) or if the end of the abbreviation
11975 table is reached. */
11976 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
11978 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
11979 abbrev_ptr
+= bytes_read
;
11980 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
11985 return abbrev_table
;
11988 /* Free the resources held by ABBREV_TABLE. */
11991 abbrev_table_free (struct abbrev_table
*abbrev_table
)
11993 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
11994 xfree (abbrev_table
);
11997 /* Same as abbrev_table_free but as a cleanup.
11998 We pass in a pointer to the pointer to the table so that we can
11999 set the pointer to NULL when we're done. It also simplifies
12000 build_type_unit_groups. */
12003 abbrev_table_free_cleanup (void *table_ptr
)
12005 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
12007 if (*abbrev_table_ptr
!= NULL
)
12008 abbrev_table_free (*abbrev_table_ptr
);
12009 *abbrev_table_ptr
= NULL
;
12012 /* Read the abbrev table for CU from ABBREV_SECTION. */
12015 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
12016 struct dwarf2_section_info
*abbrev_section
)
12019 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
12022 /* Release the memory used by the abbrev table for a compilation unit. */
12025 dwarf2_free_abbrev_table (void *ptr_to_cu
)
12027 struct dwarf2_cu
*cu
= ptr_to_cu
;
12029 abbrev_table_free (cu
->abbrev_table
);
12030 /* Set this to NULL so that we SEGV if we try to read it later,
12031 and also because free_comp_unit verifies this is NULL. */
12032 cu
->abbrev_table
= NULL
;
12035 /* Returns nonzero if TAG represents a type that we might generate a partial
12039 is_type_tag_for_partial (int tag
)
12044 /* Some types that would be reasonable to generate partial symbols for,
12045 that we don't at present. */
12046 case DW_TAG_array_type
:
12047 case DW_TAG_file_type
:
12048 case DW_TAG_ptr_to_member_type
:
12049 case DW_TAG_set_type
:
12050 case DW_TAG_string_type
:
12051 case DW_TAG_subroutine_type
:
12053 case DW_TAG_base_type
:
12054 case DW_TAG_class_type
:
12055 case DW_TAG_interface_type
:
12056 case DW_TAG_enumeration_type
:
12057 case DW_TAG_structure_type
:
12058 case DW_TAG_subrange_type
:
12059 case DW_TAG_typedef
:
12060 case DW_TAG_union_type
:
12067 /* Load all DIEs that are interesting for partial symbols into memory. */
12069 static struct partial_die_info
*
12070 load_partial_dies (const struct die_reader_specs
*reader
,
12071 gdb_byte
*info_ptr
, int building_psymtab
)
12073 struct dwarf2_cu
*cu
= reader
->cu
;
12074 struct objfile
*objfile
= cu
->objfile
;
12075 struct partial_die_info
*part_die
;
12076 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
12077 struct abbrev_info
*abbrev
;
12078 unsigned int bytes_read
;
12079 unsigned int load_all
= 0;
12080 int nesting_level
= 1;
12085 gdb_assert (cu
->per_cu
!= NULL
);
12086 if (cu
->per_cu
->load_all_dies
)
12090 = htab_create_alloc_ex (cu
->header
.length
/ 12,
12094 &cu
->comp_unit_obstack
,
12095 hashtab_obstack_allocate
,
12096 dummy_obstack_deallocate
);
12098 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
12099 sizeof (struct partial_die_info
));
12103 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
12105 /* A NULL abbrev means the end of a series of children. */
12106 if (abbrev
== NULL
)
12108 if (--nesting_level
== 0)
12110 /* PART_DIE was probably the last thing allocated on the
12111 comp_unit_obstack, so we could call obstack_free
12112 here. We don't do that because the waste is small,
12113 and will be cleaned up when we're done with this
12114 compilation unit. This way, we're also more robust
12115 against other users of the comp_unit_obstack. */
12118 info_ptr
+= bytes_read
;
12119 last_die
= parent_die
;
12120 parent_die
= parent_die
->die_parent
;
12124 /* Check for template arguments. We never save these; if
12125 they're seen, we just mark the parent, and go on our way. */
12126 if (parent_die
!= NULL
12127 && cu
->language
== language_cplus
12128 && (abbrev
->tag
== DW_TAG_template_type_param
12129 || abbrev
->tag
== DW_TAG_template_value_param
))
12131 parent_die
->has_template_arguments
= 1;
12135 /* We don't need a partial DIE for the template argument. */
12136 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
12141 /* We only recurse into c++ subprograms looking for template arguments.
12142 Skip their other children. */
12144 && cu
->language
== language_cplus
12145 && parent_die
!= NULL
12146 && parent_die
->tag
== DW_TAG_subprogram
)
12148 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
12152 /* Check whether this DIE is interesting enough to save. Normally
12153 we would not be interested in members here, but there may be
12154 later variables referencing them via DW_AT_specification (for
12155 static members). */
12157 && !is_type_tag_for_partial (abbrev
->tag
)
12158 && abbrev
->tag
!= DW_TAG_constant
12159 && abbrev
->tag
!= DW_TAG_enumerator
12160 && abbrev
->tag
!= DW_TAG_subprogram
12161 && abbrev
->tag
!= DW_TAG_lexical_block
12162 && abbrev
->tag
!= DW_TAG_variable
12163 && abbrev
->tag
!= DW_TAG_namespace
12164 && abbrev
->tag
!= DW_TAG_module
12165 && abbrev
->tag
!= DW_TAG_member
12166 && abbrev
->tag
!= DW_TAG_imported_unit
)
12168 /* Otherwise we skip to the next sibling, if any. */
12169 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
12173 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
12176 /* This two-pass algorithm for processing partial symbols has a
12177 high cost in cache pressure. Thus, handle some simple cases
12178 here which cover the majority of C partial symbols. DIEs
12179 which neither have specification tags in them, nor could have
12180 specification tags elsewhere pointing at them, can simply be
12181 processed and discarded.
12183 This segment is also optional; scan_partial_symbols and
12184 add_partial_symbol will handle these DIEs if we chain
12185 them in normally. When compilers which do not emit large
12186 quantities of duplicate debug information are more common,
12187 this code can probably be removed. */
12189 /* Any complete simple types at the top level (pretty much all
12190 of them, for a language without namespaces), can be processed
12192 if (parent_die
== NULL
12193 && part_die
->has_specification
== 0
12194 && part_die
->is_declaration
== 0
12195 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
12196 || part_die
->tag
== DW_TAG_base_type
12197 || part_die
->tag
== DW_TAG_subrange_type
))
12199 if (building_psymtab
&& part_die
->name
!= NULL
)
12200 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
12201 VAR_DOMAIN
, LOC_TYPEDEF
,
12202 &objfile
->static_psymbols
,
12203 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
12204 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
12208 /* The exception for DW_TAG_typedef with has_children above is
12209 a workaround of GCC PR debug/47510. In the case of this complaint
12210 type_name_no_tag_or_error will error on such types later.
12212 GDB skipped children of DW_TAG_typedef by the shortcut above and then
12213 it could not find the child DIEs referenced later, this is checked
12214 above. In correct DWARF DW_TAG_typedef should have no children. */
12216 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
12217 complaint (&symfile_complaints
,
12218 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
12219 "- DIE at 0x%x [in module %s]"),
12220 part_die
->offset
.sect_off
, objfile
->name
);
12222 /* If we're at the second level, and we're an enumerator, and
12223 our parent has no specification (meaning possibly lives in a
12224 namespace elsewhere), then we can add the partial symbol now
12225 instead of queueing it. */
12226 if (part_die
->tag
== DW_TAG_enumerator
12227 && parent_die
!= NULL
12228 && parent_die
->die_parent
== NULL
12229 && parent_die
->tag
== DW_TAG_enumeration_type
12230 && parent_die
->has_specification
== 0)
12232 if (part_die
->name
== NULL
)
12233 complaint (&symfile_complaints
,
12234 _("malformed enumerator DIE ignored"));
12235 else if (building_psymtab
)
12236 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
12237 VAR_DOMAIN
, LOC_CONST
,
12238 (cu
->language
== language_cplus
12239 || cu
->language
== language_java
)
12240 ? &objfile
->global_psymbols
12241 : &objfile
->static_psymbols
,
12242 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
12244 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
12248 /* We'll save this DIE so link it in. */
12249 part_die
->die_parent
= parent_die
;
12250 part_die
->die_sibling
= NULL
;
12251 part_die
->die_child
= NULL
;
12253 if (last_die
&& last_die
== parent_die
)
12254 last_die
->die_child
= part_die
;
12256 last_die
->die_sibling
= part_die
;
12258 last_die
= part_die
;
12260 if (first_die
== NULL
)
12261 first_die
= part_die
;
12263 /* Maybe add the DIE to the hash table. Not all DIEs that we
12264 find interesting need to be in the hash table, because we
12265 also have the parent/sibling/child chains; only those that we
12266 might refer to by offset later during partial symbol reading.
12268 For now this means things that might have be the target of a
12269 DW_AT_specification, DW_AT_abstract_origin, or
12270 DW_AT_extension. DW_AT_extension will refer only to
12271 namespaces; DW_AT_abstract_origin refers to functions (and
12272 many things under the function DIE, but we do not recurse
12273 into function DIEs during partial symbol reading) and
12274 possibly variables as well; DW_AT_specification refers to
12275 declarations. Declarations ought to have the DW_AT_declaration
12276 flag. It happens that GCC forgets to put it in sometimes, but
12277 only for functions, not for types.
12279 Adding more things than necessary to the hash table is harmless
12280 except for the performance cost. Adding too few will result in
12281 wasted time in find_partial_die, when we reread the compilation
12282 unit with load_all_dies set. */
12285 || abbrev
->tag
== DW_TAG_constant
12286 || abbrev
->tag
== DW_TAG_subprogram
12287 || abbrev
->tag
== DW_TAG_variable
12288 || abbrev
->tag
== DW_TAG_namespace
12289 || part_die
->is_declaration
)
12293 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
12294 part_die
->offset
.sect_off
, INSERT
);
12298 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
12299 sizeof (struct partial_die_info
));
12301 /* For some DIEs we want to follow their children (if any). For C
12302 we have no reason to follow the children of structures; for other
12303 languages we have to, so that we can get at method physnames
12304 to infer fully qualified class names, for DW_AT_specification,
12305 and for C++ template arguments. For C++, we also look one level
12306 inside functions to find template arguments (if the name of the
12307 function does not already contain the template arguments).
12309 For Ada, we need to scan the children of subprograms and lexical
12310 blocks as well because Ada allows the definition of nested
12311 entities that could be interesting for the debugger, such as
12312 nested subprograms for instance. */
12313 if (last_die
->has_children
12315 || last_die
->tag
== DW_TAG_namespace
12316 || last_die
->tag
== DW_TAG_module
12317 || last_die
->tag
== DW_TAG_enumeration_type
12318 || (cu
->language
== language_cplus
12319 && last_die
->tag
== DW_TAG_subprogram
12320 && (last_die
->name
== NULL
12321 || strchr (last_die
->name
, '<') == NULL
))
12322 || (cu
->language
!= language_c
12323 && (last_die
->tag
== DW_TAG_class_type
12324 || last_die
->tag
== DW_TAG_interface_type
12325 || last_die
->tag
== DW_TAG_structure_type
12326 || last_die
->tag
== DW_TAG_union_type
))
12327 || (cu
->language
== language_ada
12328 && (last_die
->tag
== DW_TAG_subprogram
12329 || last_die
->tag
== DW_TAG_lexical_block
))))
12332 parent_die
= last_die
;
12336 /* Otherwise we skip to the next sibling, if any. */
12337 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
12339 /* Back to the top, do it again. */
12343 /* Read a minimal amount of information into the minimal die structure. */
12346 read_partial_die (const struct die_reader_specs
*reader
,
12347 struct partial_die_info
*part_die
,
12348 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
12349 gdb_byte
*info_ptr
)
12351 struct dwarf2_cu
*cu
= reader
->cu
;
12352 struct objfile
*objfile
= cu
->objfile
;
12353 gdb_byte
*buffer
= reader
->buffer
;
12355 struct attribute attr
;
12356 int has_low_pc_attr
= 0;
12357 int has_high_pc_attr
= 0;
12358 int high_pc_relative
= 0;
12360 memset (part_die
, 0, sizeof (struct partial_die_info
));
12362 part_die
->offset
.sect_off
= info_ptr
- buffer
;
12364 info_ptr
+= abbrev_len
;
12366 if (abbrev
== NULL
)
12369 part_die
->tag
= abbrev
->tag
;
12370 part_die
->has_children
= abbrev
->has_children
;
12372 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
12374 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
12376 /* Store the data if it is of an attribute we want to keep in a
12377 partial symbol table. */
12381 switch (part_die
->tag
)
12383 case DW_TAG_compile_unit
:
12384 case DW_TAG_partial_unit
:
12385 case DW_TAG_type_unit
:
12386 /* Compilation units have a DW_AT_name that is a filename, not
12387 a source language identifier. */
12388 case DW_TAG_enumeration_type
:
12389 case DW_TAG_enumerator
:
12390 /* These tags always have simple identifiers already; no need
12391 to canonicalize them. */
12392 part_die
->name
= DW_STRING (&attr
);
12396 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
12397 &objfile
->objfile_obstack
);
12401 case DW_AT_linkage_name
:
12402 case DW_AT_MIPS_linkage_name
:
12403 /* Note that both forms of linkage name might appear. We
12404 assume they will be the same, and we only store the last
12406 if (cu
->language
== language_ada
)
12407 part_die
->name
= DW_STRING (&attr
);
12408 part_die
->linkage_name
= DW_STRING (&attr
);
12411 has_low_pc_attr
= 1;
12412 part_die
->lowpc
= DW_ADDR (&attr
);
12414 case DW_AT_high_pc
:
12415 has_high_pc_attr
= 1;
12416 if (attr
.form
== DW_FORM_addr
12417 || attr
.form
== DW_FORM_GNU_addr_index
)
12418 part_die
->highpc
= DW_ADDR (&attr
);
12421 high_pc_relative
= 1;
12422 part_die
->highpc
= DW_UNSND (&attr
);
12425 case DW_AT_location
:
12426 /* Support the .debug_loc offsets. */
12427 if (attr_form_is_block (&attr
))
12429 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
12431 else if (attr_form_is_section_offset (&attr
))
12433 dwarf2_complex_location_expr_complaint ();
12437 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
12438 "partial symbol information");
12441 case DW_AT_external
:
12442 part_die
->is_external
= DW_UNSND (&attr
);
12444 case DW_AT_declaration
:
12445 part_die
->is_declaration
= DW_UNSND (&attr
);
12448 part_die
->has_type
= 1;
12450 case DW_AT_abstract_origin
:
12451 case DW_AT_specification
:
12452 case DW_AT_extension
:
12453 part_die
->has_specification
= 1;
12454 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
12456 case DW_AT_sibling
:
12457 /* Ignore absolute siblings, they might point outside of
12458 the current compile unit. */
12459 if (attr
.form
== DW_FORM_ref_addr
)
12460 complaint (&symfile_complaints
,
12461 _("ignoring absolute DW_AT_sibling"));
12463 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
12465 case DW_AT_byte_size
:
12466 part_die
->has_byte_size
= 1;
12468 case DW_AT_calling_convention
:
12469 /* DWARF doesn't provide a way to identify a program's source-level
12470 entry point. DW_AT_calling_convention attributes are only meant
12471 to describe functions' calling conventions.
12473 However, because it's a necessary piece of information in
12474 Fortran, and because DW_CC_program is the only piece of debugging
12475 information whose definition refers to a 'main program' at all,
12476 several compilers have begun marking Fortran main programs with
12477 DW_CC_program --- even when those functions use the standard
12478 calling conventions.
12480 So until DWARF specifies a way to provide this information and
12481 compilers pick up the new representation, we'll support this
12483 if (DW_UNSND (&attr
) == DW_CC_program
12484 && cu
->language
== language_fortran
)
12486 set_main_name (part_die
->name
);
12488 /* As this DIE has a static linkage the name would be difficult
12489 to look up later. */
12490 language_of_main
= language_fortran
;
12494 if (DW_UNSND (&attr
) == DW_INL_inlined
12495 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
12496 part_die
->may_be_inlined
= 1;
12500 if (part_die
->tag
== DW_TAG_imported_unit
)
12501 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
12509 if (high_pc_relative
)
12510 part_die
->highpc
+= part_die
->lowpc
;
12512 if (has_low_pc_attr
&& has_high_pc_attr
)
12514 /* When using the GNU linker, .gnu.linkonce. sections are used to
12515 eliminate duplicate copies of functions and vtables and such.
12516 The linker will arbitrarily choose one and discard the others.
12517 The AT_*_pc values for such functions refer to local labels in
12518 these sections. If the section from that file was discarded, the
12519 labels are not in the output, so the relocs get a value of 0.
12520 If this is a discarded function, mark the pc bounds as invalid,
12521 so that GDB will ignore it. */
12522 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12524 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12526 complaint (&symfile_complaints
,
12527 _("DW_AT_low_pc %s is zero "
12528 "for DIE at 0x%x [in module %s]"),
12529 paddress (gdbarch
, part_die
->lowpc
),
12530 part_die
->offset
.sect_off
, objfile
->name
);
12532 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
12533 else if (part_die
->lowpc
>= part_die
->highpc
)
12535 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12537 complaint (&symfile_complaints
,
12538 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
12539 "for DIE at 0x%x [in module %s]"),
12540 paddress (gdbarch
, part_die
->lowpc
),
12541 paddress (gdbarch
, part_die
->highpc
),
12542 part_die
->offset
.sect_off
, objfile
->name
);
12545 part_die
->has_pc_info
= 1;
12551 /* Find a cached partial DIE at OFFSET in CU. */
12553 static struct partial_die_info
*
12554 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
12556 struct partial_die_info
*lookup_die
= NULL
;
12557 struct partial_die_info part_die
;
12559 part_die
.offset
= offset
;
12560 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
12566 /* Find a partial DIE at OFFSET, which may or may not be in CU,
12567 except in the case of .debug_types DIEs which do not reference
12568 outside their CU (they do however referencing other types via
12569 DW_FORM_ref_sig8). */
12571 static struct partial_die_info
*
12572 find_partial_die (sect_offset offset
, struct dwarf2_cu
*cu
)
12574 struct objfile
*objfile
= cu
->objfile
;
12575 struct dwarf2_per_cu_data
*per_cu
= NULL
;
12576 struct partial_die_info
*pd
= NULL
;
12578 if (offset_in_cu_p (&cu
->header
, offset
))
12580 pd
= find_partial_die_in_comp_unit (offset
, cu
);
12583 /* We missed recording what we needed.
12584 Load all dies and try again. */
12585 per_cu
= cu
->per_cu
;
12589 /* TUs don't reference other CUs/TUs (except via type signatures). */
12590 if (cu
->per_cu
->is_debug_types
)
12592 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
12593 " external reference to offset 0x%lx [in module %s].\n"),
12594 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
12595 bfd_get_filename (objfile
->obfd
));
12597 per_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
12599 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
12600 load_partial_comp_unit (per_cu
);
12602 per_cu
->cu
->last_used
= 0;
12603 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
12606 /* If we didn't find it, and not all dies have been loaded,
12607 load them all and try again. */
12609 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
12611 per_cu
->load_all_dies
= 1;
12613 /* This is nasty. When we reread the DIEs, somewhere up the call chain
12614 THIS_CU->cu may already be in use. So we can't just free it and
12615 replace its DIEs with the ones we read in. Instead, we leave those
12616 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
12617 and clobber THIS_CU->cu->partial_dies with the hash table for the new
12619 load_partial_comp_unit (per_cu
);
12621 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
12625 internal_error (__FILE__
, __LINE__
,
12626 _("could not find partial DIE 0x%x "
12627 "in cache [from module %s]\n"),
12628 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
12632 /* See if we can figure out if the class lives in a namespace. We do
12633 this by looking for a member function; its demangled name will
12634 contain namespace info, if there is any. */
12637 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
12638 struct dwarf2_cu
*cu
)
12640 /* NOTE: carlton/2003-10-07: Getting the info this way changes
12641 what template types look like, because the demangler
12642 frequently doesn't give the same name as the debug info. We
12643 could fix this by only using the demangled name to get the
12644 prefix (but see comment in read_structure_type). */
12646 struct partial_die_info
*real_pdi
;
12647 struct partial_die_info
*child_pdi
;
12649 /* If this DIE (this DIE's specification, if any) has a parent, then
12650 we should not do this. We'll prepend the parent's fully qualified
12651 name when we create the partial symbol. */
12653 real_pdi
= struct_pdi
;
12654 while (real_pdi
->has_specification
)
12655 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
12657 if (real_pdi
->die_parent
!= NULL
)
12660 for (child_pdi
= struct_pdi
->die_child
;
12662 child_pdi
= child_pdi
->die_sibling
)
12664 if (child_pdi
->tag
== DW_TAG_subprogram
12665 && child_pdi
->linkage_name
!= NULL
)
12667 char *actual_class_name
12668 = language_class_name_from_physname (cu
->language_defn
,
12669 child_pdi
->linkage_name
);
12670 if (actual_class_name
!= NULL
)
12673 = obsavestring (actual_class_name
,
12674 strlen (actual_class_name
),
12675 &cu
->objfile
->objfile_obstack
);
12676 xfree (actual_class_name
);
12683 /* Adjust PART_DIE before generating a symbol for it. This function
12684 may set the is_external flag or change the DIE's name. */
12687 fixup_partial_die (struct partial_die_info
*part_die
,
12688 struct dwarf2_cu
*cu
)
12690 /* Once we've fixed up a die, there's no point in doing so again.
12691 This also avoids a memory leak if we were to call
12692 guess_partial_die_structure_name multiple times. */
12693 if (part_die
->fixup_called
)
12696 /* If we found a reference attribute and the DIE has no name, try
12697 to find a name in the referred to DIE. */
12699 if (part_die
->name
== NULL
&& part_die
->has_specification
)
12701 struct partial_die_info
*spec_die
;
12703 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
12705 fixup_partial_die (spec_die
, cu
);
12707 if (spec_die
->name
)
12709 part_die
->name
= spec_die
->name
;
12711 /* Copy DW_AT_external attribute if it is set. */
12712 if (spec_die
->is_external
)
12713 part_die
->is_external
= spec_die
->is_external
;
12717 /* Set default names for some unnamed DIEs. */
12719 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
12720 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
12722 /* If there is no parent die to provide a namespace, and there are
12723 children, see if we can determine the namespace from their linkage
12725 if (cu
->language
== language_cplus
12726 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
12727 && part_die
->die_parent
== NULL
12728 && part_die
->has_children
12729 && (part_die
->tag
== DW_TAG_class_type
12730 || part_die
->tag
== DW_TAG_structure_type
12731 || part_die
->tag
== DW_TAG_union_type
))
12732 guess_partial_die_structure_name (part_die
, cu
);
12734 /* GCC might emit a nameless struct or union that has a linkage
12735 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
12736 if (part_die
->name
== NULL
12737 && (part_die
->tag
== DW_TAG_class_type
12738 || part_die
->tag
== DW_TAG_interface_type
12739 || part_die
->tag
== DW_TAG_structure_type
12740 || part_die
->tag
== DW_TAG_union_type
)
12741 && part_die
->linkage_name
!= NULL
)
12745 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
12750 /* Strip any leading namespaces/classes, keep only the base name.
12751 DW_AT_name for named DIEs does not contain the prefixes. */
12752 base
= strrchr (demangled
, ':');
12753 if (base
&& base
> demangled
&& base
[-1] == ':')
12758 part_die
->name
= obsavestring (base
, strlen (base
),
12759 &cu
->objfile
->objfile_obstack
);
12764 part_die
->fixup_called
= 1;
12767 /* Read an attribute value described by an attribute form. */
12770 read_attribute_value (const struct die_reader_specs
*reader
,
12771 struct attribute
*attr
, unsigned form
,
12772 gdb_byte
*info_ptr
)
12774 struct dwarf2_cu
*cu
= reader
->cu
;
12775 bfd
*abfd
= reader
->abfd
;
12776 struct comp_unit_head
*cu_header
= &cu
->header
;
12777 unsigned int bytes_read
;
12778 struct dwarf_block
*blk
;
12783 case DW_FORM_ref_addr
:
12784 if (cu
->header
.version
== 2)
12785 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
12787 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
12788 &cu
->header
, &bytes_read
);
12789 info_ptr
+= bytes_read
;
12792 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
12793 info_ptr
+= bytes_read
;
12795 case DW_FORM_block2
:
12796 blk
= dwarf_alloc_block (cu
);
12797 blk
->size
= read_2_bytes (abfd
, info_ptr
);
12799 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
12800 info_ptr
+= blk
->size
;
12801 DW_BLOCK (attr
) = blk
;
12803 case DW_FORM_block4
:
12804 blk
= dwarf_alloc_block (cu
);
12805 blk
->size
= read_4_bytes (abfd
, info_ptr
);
12807 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
12808 info_ptr
+= blk
->size
;
12809 DW_BLOCK (attr
) = blk
;
12811 case DW_FORM_data2
:
12812 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
12815 case DW_FORM_data4
:
12816 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
12819 case DW_FORM_data8
:
12820 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
12823 case DW_FORM_sec_offset
:
12824 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
12825 info_ptr
+= bytes_read
;
12827 case DW_FORM_string
:
12828 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
12829 DW_STRING_IS_CANONICAL (attr
) = 0;
12830 info_ptr
+= bytes_read
;
12833 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
12835 DW_STRING_IS_CANONICAL (attr
) = 0;
12836 info_ptr
+= bytes_read
;
12838 case DW_FORM_exprloc
:
12839 case DW_FORM_block
:
12840 blk
= dwarf_alloc_block (cu
);
12841 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12842 info_ptr
+= bytes_read
;
12843 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
12844 info_ptr
+= blk
->size
;
12845 DW_BLOCK (attr
) = blk
;
12847 case DW_FORM_block1
:
12848 blk
= dwarf_alloc_block (cu
);
12849 blk
->size
= read_1_byte (abfd
, info_ptr
);
12851 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
12852 info_ptr
+= blk
->size
;
12853 DW_BLOCK (attr
) = blk
;
12855 case DW_FORM_data1
:
12856 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
12860 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
12863 case DW_FORM_flag_present
:
12864 DW_UNSND (attr
) = 1;
12866 case DW_FORM_sdata
:
12867 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
12868 info_ptr
+= bytes_read
;
12870 case DW_FORM_udata
:
12871 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12872 info_ptr
+= bytes_read
;
12875 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
12876 + read_1_byte (abfd
, info_ptr
));
12880 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
12881 + read_2_bytes (abfd
, info_ptr
));
12885 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
12886 + read_4_bytes (abfd
, info_ptr
));
12890 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
12891 + read_8_bytes (abfd
, info_ptr
));
12894 case DW_FORM_ref_sig8
:
12895 /* Convert the signature to something we can record in DW_UNSND
12897 NOTE: This is NULL if the type wasn't found. */
12898 DW_SIGNATURED_TYPE (attr
) =
12899 lookup_signatured_type (read_8_bytes (abfd
, info_ptr
));
12902 case DW_FORM_ref_udata
:
12903 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
12904 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
12905 info_ptr
+= bytes_read
;
12907 case DW_FORM_indirect
:
12908 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12909 info_ptr
+= bytes_read
;
12910 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
12912 case DW_FORM_GNU_addr_index
:
12913 if (reader
->dwo_file
== NULL
)
12915 /* For now flag a hard error.
12916 Later we can turn this into a complaint. */
12917 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
12918 dwarf_form_name (form
),
12919 bfd_get_filename (abfd
));
12921 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
12922 info_ptr
+= bytes_read
;
12924 case DW_FORM_GNU_str_index
:
12925 if (reader
->dwo_file
== NULL
)
12927 /* For now flag a hard error.
12928 Later we can turn this into a complaint if warranted. */
12929 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
12930 dwarf_form_name (form
),
12931 bfd_get_filename (abfd
));
12934 ULONGEST str_index
=
12935 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12937 DW_STRING (attr
) = read_str_index (reader
, cu
, str_index
);
12938 DW_STRING_IS_CANONICAL (attr
) = 0;
12939 info_ptr
+= bytes_read
;
12943 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
12944 dwarf_form_name (form
),
12945 bfd_get_filename (abfd
));
12948 /* We have seen instances where the compiler tried to emit a byte
12949 size attribute of -1 which ended up being encoded as an unsigned
12950 0xffffffff. Although 0xffffffff is technically a valid size value,
12951 an object of this size seems pretty unlikely so we can relatively
12952 safely treat these cases as if the size attribute was invalid and
12953 treat them as zero by default. */
12954 if (attr
->name
== DW_AT_byte_size
12955 && form
== DW_FORM_data4
12956 && DW_UNSND (attr
) >= 0xffffffff)
12959 (&symfile_complaints
,
12960 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
12961 hex_string (DW_UNSND (attr
)));
12962 DW_UNSND (attr
) = 0;
12968 /* Read an attribute described by an abbreviated attribute. */
12971 read_attribute (const struct die_reader_specs
*reader
,
12972 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
12973 gdb_byte
*info_ptr
)
12975 attr
->name
= abbrev
->name
;
12976 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
12979 /* Read dwarf information from a buffer. */
12981 static unsigned int
12982 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
12984 return bfd_get_8 (abfd
, buf
);
12988 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
12990 return bfd_get_signed_8 (abfd
, buf
);
12993 static unsigned int
12994 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
12996 return bfd_get_16 (abfd
, buf
);
13000 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
13002 return bfd_get_signed_16 (abfd
, buf
);
13005 static unsigned int
13006 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
13008 return bfd_get_32 (abfd
, buf
);
13012 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
13014 return bfd_get_signed_32 (abfd
, buf
);
13018 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
13020 return bfd_get_64 (abfd
, buf
);
13024 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
13025 unsigned int *bytes_read
)
13027 struct comp_unit_head
*cu_header
= &cu
->header
;
13028 CORE_ADDR retval
= 0;
13030 if (cu_header
->signed_addr_p
)
13032 switch (cu_header
->addr_size
)
13035 retval
= bfd_get_signed_16 (abfd
, buf
);
13038 retval
= bfd_get_signed_32 (abfd
, buf
);
13041 retval
= bfd_get_signed_64 (abfd
, buf
);
13044 internal_error (__FILE__
, __LINE__
,
13045 _("read_address: bad switch, signed [in module %s]"),
13046 bfd_get_filename (abfd
));
13051 switch (cu_header
->addr_size
)
13054 retval
= bfd_get_16 (abfd
, buf
);
13057 retval
= bfd_get_32 (abfd
, buf
);
13060 retval
= bfd_get_64 (abfd
, buf
);
13063 internal_error (__FILE__
, __LINE__
,
13064 _("read_address: bad switch, "
13065 "unsigned [in module %s]"),
13066 bfd_get_filename (abfd
));
13070 *bytes_read
= cu_header
->addr_size
;
13074 /* Read the initial length from a section. The (draft) DWARF 3
13075 specification allows the initial length to take up either 4 bytes
13076 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
13077 bytes describe the length and all offsets will be 8 bytes in length
13080 An older, non-standard 64-bit format is also handled by this
13081 function. The older format in question stores the initial length
13082 as an 8-byte quantity without an escape value. Lengths greater
13083 than 2^32 aren't very common which means that the initial 4 bytes
13084 is almost always zero. Since a length value of zero doesn't make
13085 sense for the 32-bit format, this initial zero can be considered to
13086 be an escape value which indicates the presence of the older 64-bit
13087 format. As written, the code can't detect (old format) lengths
13088 greater than 4GB. If it becomes necessary to handle lengths
13089 somewhat larger than 4GB, we could allow other small values (such
13090 as the non-sensical values of 1, 2, and 3) to also be used as
13091 escape values indicating the presence of the old format.
13093 The value returned via bytes_read should be used to increment the
13094 relevant pointer after calling read_initial_length().
13096 [ Note: read_initial_length() and read_offset() are based on the
13097 document entitled "DWARF Debugging Information Format", revision
13098 3, draft 8, dated November 19, 2001. This document was obtained
13101 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
13103 This document is only a draft and is subject to change. (So beware.)
13105 Details regarding the older, non-standard 64-bit format were
13106 determined empirically by examining 64-bit ELF files produced by
13107 the SGI toolchain on an IRIX 6.5 machine.
13109 - Kevin, July 16, 2002
13113 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
13115 LONGEST length
= bfd_get_32 (abfd
, buf
);
13117 if (length
== 0xffffffff)
13119 length
= bfd_get_64 (abfd
, buf
+ 4);
13122 else if (length
== 0)
13124 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
13125 length
= bfd_get_64 (abfd
, buf
);
13136 /* Cover function for read_initial_length.
13137 Returns the length of the object at BUF, and stores the size of the
13138 initial length in *BYTES_READ and stores the size that offsets will be in
13140 If the initial length size is not equivalent to that specified in
13141 CU_HEADER then issue a complaint.
13142 This is useful when reading non-comp-unit headers. */
13145 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
13146 const struct comp_unit_head
*cu_header
,
13147 unsigned int *bytes_read
,
13148 unsigned int *offset_size
)
13150 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
13152 gdb_assert (cu_header
->initial_length_size
== 4
13153 || cu_header
->initial_length_size
== 8
13154 || cu_header
->initial_length_size
== 12);
13156 if (cu_header
->initial_length_size
!= *bytes_read
)
13157 complaint (&symfile_complaints
,
13158 _("intermixed 32-bit and 64-bit DWARF sections"));
13160 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
13164 /* Read an offset from the data stream. The size of the offset is
13165 given by cu_header->offset_size. */
13168 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
13169 unsigned int *bytes_read
)
13171 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
13173 *bytes_read
= cu_header
->offset_size
;
13177 /* Read an offset from the data stream. */
13180 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
13182 LONGEST retval
= 0;
13184 switch (offset_size
)
13187 retval
= bfd_get_32 (abfd
, buf
);
13190 retval
= bfd_get_64 (abfd
, buf
);
13193 internal_error (__FILE__
, __LINE__
,
13194 _("read_offset_1: bad switch [in module %s]"),
13195 bfd_get_filename (abfd
));
13202 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
13204 /* If the size of a host char is 8 bits, we can return a pointer
13205 to the buffer, otherwise we have to copy the data to a buffer
13206 allocated on the temporary obstack. */
13207 gdb_assert (HOST_CHAR_BIT
== 8);
13212 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
13214 /* If the size of a host char is 8 bits, we can return a pointer
13215 to the string, otherwise we have to copy the string to a buffer
13216 allocated on the temporary obstack. */
13217 gdb_assert (HOST_CHAR_BIT
== 8);
13220 *bytes_read_ptr
= 1;
13223 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
13224 return (char *) buf
;
13228 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
13230 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
13231 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
13232 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
13233 bfd_get_filename (abfd
));
13234 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
13235 error (_("DW_FORM_strp pointing outside of "
13236 ".debug_str section [in module %s]"),
13237 bfd_get_filename (abfd
));
13238 gdb_assert (HOST_CHAR_BIT
== 8);
13239 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
13241 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
13245 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
13246 const struct comp_unit_head
*cu_header
,
13247 unsigned int *bytes_read_ptr
)
13249 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
13251 return read_indirect_string_at_offset (abfd
, str_offset
);
13255 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
13258 unsigned int num_read
;
13260 unsigned char byte
;
13268 byte
= bfd_get_8 (abfd
, buf
);
13271 result
|= ((ULONGEST
) (byte
& 127) << shift
);
13272 if ((byte
& 128) == 0)
13278 *bytes_read_ptr
= num_read
;
13283 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
13286 int i
, shift
, num_read
;
13287 unsigned char byte
;
13295 byte
= bfd_get_8 (abfd
, buf
);
13298 result
|= ((LONGEST
) (byte
& 127) << shift
);
13300 if ((byte
& 128) == 0)
13305 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
13306 result
|= -(((LONGEST
) 1) << shift
);
13307 *bytes_read_ptr
= num_read
;
13311 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
13312 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
13313 ADDR_SIZE is the size of addresses from the CU header. */
13316 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
13318 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13319 bfd
*abfd
= objfile
->obfd
;
13320 const gdb_byte
*info_ptr
;
13322 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
13323 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
13324 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
13326 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
13327 error (_("DW_FORM_addr_index pointing outside of "
13328 ".debug_addr section [in module %s]"),
13330 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
13331 + addr_base
+ addr_index
* addr_size
);
13332 if (addr_size
== 4)
13333 return bfd_get_32 (abfd
, info_ptr
);
13335 return bfd_get_64 (abfd
, info_ptr
);
13338 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
13341 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
13343 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
13346 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
13349 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, gdb_byte
*info_ptr
,
13350 unsigned int *bytes_read
)
13352 bfd
*abfd
= cu
->objfile
->obfd
;
13353 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
13355 return read_addr_index (cu
, addr_index
);
13358 /* Data structure to pass results from dwarf2_read_addr_index_reader
13359 back to dwarf2_read_addr_index. */
13361 struct dwarf2_read_addr_index_data
13363 ULONGEST addr_base
;
13367 /* die_reader_func for dwarf2_read_addr_index. */
13370 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
13371 gdb_byte
*info_ptr
,
13372 struct die_info
*comp_unit_die
,
13376 struct dwarf2_cu
*cu
= reader
->cu
;
13377 struct dwarf2_read_addr_index_data
*aidata
=
13378 (struct dwarf2_read_addr_index_data
*) data
;
13380 aidata
->addr_base
= cu
->addr_base
;
13381 aidata
->addr_size
= cu
->header
.addr_size
;
13384 /* Given an index in .debug_addr, fetch the value.
13385 NOTE: This can be called during dwarf expression evaluation,
13386 long after the debug information has been read, and thus per_cu->cu
13387 may no longer exist. */
13390 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
13391 unsigned int addr_index
)
13393 struct objfile
*objfile
= per_cu
->objfile
;
13394 struct dwarf2_cu
*cu
= per_cu
->cu
;
13395 ULONGEST addr_base
;
13398 /* This is intended to be called from outside this file. */
13399 dw2_setup (objfile
);
13401 /* We need addr_base and addr_size.
13402 If we don't have PER_CU->cu, we have to get it.
13403 Nasty, but the alternative is storing the needed info in PER_CU,
13404 which at this point doesn't seem justified: it's not clear how frequently
13405 it would get used and it would increase the size of every PER_CU.
13406 Entry points like dwarf2_per_cu_addr_size do a similar thing
13407 so we're not in uncharted territory here.
13408 Alas we need to be a bit more complicated as addr_base is contained
13411 We don't need to read the entire CU(/TU).
13412 We just need the header and top level die.
13413 IWBN to use the aging mechanism to let us lazily later discard the CU.
13414 See however init_cutu_and_read_dies_simple. */
13418 addr_base
= cu
->addr_base
;
13419 addr_size
= cu
->header
.addr_size
;
13423 struct dwarf2_read_addr_index_data aidata
;
13425 init_cutu_and_read_dies_simple (per_cu
, dwarf2_read_addr_index_reader
,
13427 addr_base
= aidata
.addr_base
;
13428 addr_size
= aidata
.addr_size
;
13431 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
13434 /* Given a DW_AT_str_index, fetch the string. */
13437 read_str_index (const struct die_reader_specs
*reader
,
13438 struct dwarf2_cu
*cu
, ULONGEST str_index
)
13440 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13441 const char *dwo_name
= objfile
->name
;
13442 bfd
*abfd
= objfile
->obfd
;
13443 struct dwo_sections
*sections
= &reader
->dwo_file
->sections
;
13444 gdb_byte
*info_ptr
;
13445 ULONGEST str_offset
;
13447 dwarf2_read_section (objfile
, §ions
->str
);
13448 dwarf2_read_section (objfile
, §ions
->str_offsets
);
13449 if (sections
->str
.buffer
== NULL
)
13450 error (_("DW_FORM_str_index used without .debug_str.dwo section"
13451 " in CU at offset 0x%lx [in module %s]"),
13452 (long) cu
->header
.offset
.sect_off
, dwo_name
);
13453 if (sections
->str_offsets
.buffer
== NULL
)
13454 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
13455 " in CU at offset 0x%lx [in module %s]"),
13456 (long) cu
->header
.offset
.sect_off
, dwo_name
);
13457 if (str_index
* cu
->header
.offset_size
>= sections
->str_offsets
.size
)
13458 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
13459 " section in CU at offset 0x%lx [in module %s]"),
13460 (long) cu
->header
.offset
.sect_off
, dwo_name
);
13461 info_ptr
= (sections
->str_offsets
.buffer
13462 + str_index
* cu
->header
.offset_size
);
13463 if (cu
->header
.offset_size
== 4)
13464 str_offset
= bfd_get_32 (abfd
, info_ptr
);
13466 str_offset
= bfd_get_64 (abfd
, info_ptr
);
13467 if (str_offset
>= sections
->str
.size
)
13468 error (_("Offset from DW_FORM_str_index pointing outside of"
13469 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
13470 (long) cu
->header
.offset
.sect_off
, dwo_name
);
13471 return (char *) (sections
->str
.buffer
+ str_offset
);
13474 /* Return the length of an LEB128 number in BUF. */
13477 leb128_size (const gdb_byte
*buf
)
13479 const gdb_byte
*begin
= buf
;
13485 if ((byte
& 128) == 0)
13486 return buf
- begin
;
13491 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
13498 cu
->language
= language_c
;
13500 case DW_LANG_C_plus_plus
:
13501 cu
->language
= language_cplus
;
13504 cu
->language
= language_d
;
13506 case DW_LANG_Fortran77
:
13507 case DW_LANG_Fortran90
:
13508 case DW_LANG_Fortran95
:
13509 cu
->language
= language_fortran
;
13512 cu
->language
= language_go
;
13514 case DW_LANG_Mips_Assembler
:
13515 cu
->language
= language_asm
;
13518 cu
->language
= language_java
;
13520 case DW_LANG_Ada83
:
13521 case DW_LANG_Ada95
:
13522 cu
->language
= language_ada
;
13524 case DW_LANG_Modula2
:
13525 cu
->language
= language_m2
;
13527 case DW_LANG_Pascal83
:
13528 cu
->language
= language_pascal
;
13531 cu
->language
= language_objc
;
13533 case DW_LANG_Cobol74
:
13534 case DW_LANG_Cobol85
:
13536 cu
->language
= language_minimal
;
13539 cu
->language_defn
= language_def (cu
->language
);
13542 /* Return the named attribute or NULL if not there. */
13544 static struct attribute
*
13545 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
13550 struct attribute
*spec
= NULL
;
13552 for (i
= 0; i
< die
->num_attrs
; ++i
)
13554 if (die
->attrs
[i
].name
== name
)
13555 return &die
->attrs
[i
];
13556 if (die
->attrs
[i
].name
== DW_AT_specification
13557 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
13558 spec
= &die
->attrs
[i
];
13564 die
= follow_die_ref (die
, spec
, &cu
);
13570 /* Return the named attribute or NULL if not there,
13571 but do not follow DW_AT_specification, etc.
13572 This is for use in contexts where we're reading .debug_types dies.
13573 Following DW_AT_specification, DW_AT_abstract_origin will take us
13574 back up the chain, and we want to go down. */
13576 static struct attribute
*
13577 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
13581 for (i
= 0; i
< die
->num_attrs
; ++i
)
13582 if (die
->attrs
[i
].name
== name
)
13583 return &die
->attrs
[i
];
13588 /* Return non-zero iff the attribute NAME is defined for the given DIE,
13589 and holds a non-zero value. This function should only be used for
13590 DW_FORM_flag or DW_FORM_flag_present attributes. */
13593 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
13595 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
13597 return (attr
&& DW_UNSND (attr
));
13601 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
13603 /* A DIE is a declaration if it has a DW_AT_declaration attribute
13604 which value is non-zero. However, we have to be careful with
13605 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
13606 (via dwarf2_flag_true_p) follows this attribute. So we may
13607 end up accidently finding a declaration attribute that belongs
13608 to a different DIE referenced by the specification attribute,
13609 even though the given DIE does not have a declaration attribute. */
13610 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
13611 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
13614 /* Return the die giving the specification for DIE, if there is
13615 one. *SPEC_CU is the CU containing DIE on input, and the CU
13616 containing the return value on output. If there is no
13617 specification, but there is an abstract origin, that is
13620 static struct die_info
*
13621 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
13623 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
13626 if (spec_attr
== NULL
)
13627 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
13629 if (spec_attr
== NULL
)
13632 return follow_die_ref (die
, spec_attr
, spec_cu
);
13635 /* Free the line_header structure *LH, and any arrays and strings it
13637 NOTE: This is also used as a "cleanup" function. */
13640 free_line_header (struct line_header
*lh
)
13642 if (lh
->standard_opcode_lengths
)
13643 xfree (lh
->standard_opcode_lengths
);
13645 /* Remember that all the lh->file_names[i].name pointers are
13646 pointers into debug_line_buffer, and don't need to be freed. */
13647 if (lh
->file_names
)
13648 xfree (lh
->file_names
);
13650 /* Similarly for the include directory names. */
13651 if (lh
->include_dirs
)
13652 xfree (lh
->include_dirs
);
13657 /* Add an entry to LH's include directory table. */
13660 add_include_dir (struct line_header
*lh
, char *include_dir
)
13662 /* Grow the array if necessary. */
13663 if (lh
->include_dirs_size
== 0)
13665 lh
->include_dirs_size
= 1; /* for testing */
13666 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
13667 * sizeof (*lh
->include_dirs
));
13669 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
13671 lh
->include_dirs_size
*= 2;
13672 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
13673 (lh
->include_dirs_size
13674 * sizeof (*lh
->include_dirs
)));
13677 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
13680 /* Add an entry to LH's file name table. */
13683 add_file_name (struct line_header
*lh
,
13685 unsigned int dir_index
,
13686 unsigned int mod_time
,
13687 unsigned int length
)
13689 struct file_entry
*fe
;
13691 /* Grow the array if necessary. */
13692 if (lh
->file_names_size
== 0)
13694 lh
->file_names_size
= 1; /* for testing */
13695 lh
->file_names
= xmalloc (lh
->file_names_size
13696 * sizeof (*lh
->file_names
));
13698 else if (lh
->num_file_names
>= lh
->file_names_size
)
13700 lh
->file_names_size
*= 2;
13701 lh
->file_names
= xrealloc (lh
->file_names
,
13702 (lh
->file_names_size
13703 * sizeof (*lh
->file_names
)));
13706 fe
= &lh
->file_names
[lh
->num_file_names
++];
13708 fe
->dir_index
= dir_index
;
13709 fe
->mod_time
= mod_time
;
13710 fe
->length
= length
;
13711 fe
->included_p
= 0;
13715 /* Read the statement program header starting at OFFSET in
13716 .debug_line, or .debug_line.dwo. Return a pointer
13717 to a struct line_header, allocated using xmalloc.
13719 NOTE: the strings in the include directory and file name tables of
13720 the returned object point into the dwarf line section buffer,
13721 and must not be freed. */
13723 static struct line_header
*
13724 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
13726 struct cleanup
*back_to
;
13727 struct line_header
*lh
;
13728 gdb_byte
*line_ptr
;
13729 unsigned int bytes_read
, offset_size
;
13731 char *cur_dir
, *cur_file
;
13732 struct dwarf2_section_info
*section
;
13735 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
13737 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
13738 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
13740 section
= &dwarf2_per_objfile
->line
;
13742 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
13743 if (section
->buffer
== NULL
)
13745 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
13746 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
13748 complaint (&symfile_complaints
, _("missing .debug_line section"));
13752 /* We can't do this until we know the section is non-empty.
13753 Only then do we know we have such a section. */
13754 abfd
= section
->asection
->owner
;
13756 /* Make sure that at least there's room for the total_length field.
13757 That could be 12 bytes long, but we're just going to fudge that. */
13758 if (offset
+ 4 >= section
->size
)
13760 dwarf2_statement_list_fits_in_line_number_section_complaint ();
13764 lh
= xmalloc (sizeof (*lh
));
13765 memset (lh
, 0, sizeof (*lh
));
13766 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
13769 line_ptr
= section
->buffer
+ offset
;
13771 /* Read in the header. */
13773 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
13774 &bytes_read
, &offset_size
);
13775 line_ptr
+= bytes_read
;
13776 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
13778 dwarf2_statement_list_fits_in_line_number_section_complaint ();
13781 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
13782 lh
->version
= read_2_bytes (abfd
, line_ptr
);
13784 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
13785 line_ptr
+= offset_size
;
13786 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
13788 if (lh
->version
>= 4)
13790 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
13794 lh
->maximum_ops_per_instruction
= 1;
13796 if (lh
->maximum_ops_per_instruction
== 0)
13798 lh
->maximum_ops_per_instruction
= 1;
13799 complaint (&symfile_complaints
,
13800 _("invalid maximum_ops_per_instruction "
13801 "in `.debug_line' section"));
13804 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
13806 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
13808 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
13810 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
13812 lh
->standard_opcode_lengths
13813 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
13815 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
13816 for (i
= 1; i
< lh
->opcode_base
; ++i
)
13818 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
13822 /* Read directory table. */
13823 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
13825 line_ptr
+= bytes_read
;
13826 add_include_dir (lh
, cur_dir
);
13828 line_ptr
+= bytes_read
;
13830 /* Read file name table. */
13831 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
13833 unsigned int dir_index
, mod_time
, length
;
13835 line_ptr
+= bytes_read
;
13836 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13837 line_ptr
+= bytes_read
;
13838 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13839 line_ptr
+= bytes_read
;
13840 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13841 line_ptr
+= bytes_read
;
13843 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
13845 line_ptr
+= bytes_read
;
13846 lh
->statement_program_start
= line_ptr
;
13848 if (line_ptr
> (section
->buffer
+ section
->size
))
13849 complaint (&symfile_complaints
,
13850 _("line number info header doesn't "
13851 "fit in `.debug_line' section"));
13853 discard_cleanups (back_to
);
13857 /* Subroutine of dwarf_decode_lines to simplify it.
13858 Return the file name of the psymtab for included file FILE_INDEX
13859 in line header LH of PST.
13860 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
13861 If space for the result is malloc'd, it will be freed by a cleanup.
13862 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
13865 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
13866 const struct partial_symtab
*pst
,
13867 const char *comp_dir
)
13869 const struct file_entry fe
= lh
->file_names
[file_index
];
13870 char *include_name
= fe
.name
;
13871 char *include_name_to_compare
= include_name
;
13872 char *dir_name
= NULL
;
13873 const char *pst_filename
;
13874 char *copied_name
= NULL
;
13878 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
13880 if (!IS_ABSOLUTE_PATH (include_name
)
13881 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
13883 /* Avoid creating a duplicate psymtab for PST.
13884 We do this by comparing INCLUDE_NAME and PST_FILENAME.
13885 Before we do the comparison, however, we need to account
13886 for DIR_NAME and COMP_DIR.
13887 First prepend dir_name (if non-NULL). If we still don't
13888 have an absolute path prepend comp_dir (if non-NULL).
13889 However, the directory we record in the include-file's
13890 psymtab does not contain COMP_DIR (to match the
13891 corresponding symtab(s)).
13896 bash$ gcc -g ./hello.c
13897 include_name = "hello.c"
13899 DW_AT_comp_dir = comp_dir = "/tmp"
13900 DW_AT_name = "./hello.c" */
13902 if (dir_name
!= NULL
)
13904 include_name
= concat (dir_name
, SLASH_STRING
,
13905 include_name
, (char *)NULL
);
13906 include_name_to_compare
= include_name
;
13907 make_cleanup (xfree
, include_name
);
13909 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
13911 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
13912 include_name
, (char *)NULL
);
13916 pst_filename
= pst
->filename
;
13917 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
13919 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
13920 pst_filename
, (char *)NULL
);
13921 pst_filename
= copied_name
;
13924 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
13926 if (include_name_to_compare
!= include_name
)
13927 xfree (include_name_to_compare
);
13928 if (copied_name
!= NULL
)
13929 xfree (copied_name
);
13933 return include_name
;
13936 /* Ignore this record_line request. */
13939 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
13944 /* Subroutine of dwarf_decode_lines to simplify it.
13945 Process the line number information in LH. */
13948 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
13949 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
13951 gdb_byte
*line_ptr
, *extended_end
;
13952 gdb_byte
*line_end
;
13953 unsigned int bytes_read
, extended_len
;
13954 unsigned char op_code
, extended_op
, adj_opcode
;
13955 CORE_ADDR baseaddr
;
13956 struct objfile
*objfile
= cu
->objfile
;
13957 bfd
*abfd
= objfile
->obfd
;
13958 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13959 const int decode_for_pst_p
= (pst
!= NULL
);
13960 struct subfile
*last_subfile
= NULL
;
13961 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
13964 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13966 line_ptr
= lh
->statement_program_start
;
13967 line_end
= lh
->statement_program_end
;
13969 /* Read the statement sequences until there's nothing left. */
13970 while (line_ptr
< line_end
)
13972 /* state machine registers */
13973 CORE_ADDR address
= 0;
13974 unsigned int file
= 1;
13975 unsigned int line
= 1;
13976 unsigned int column
= 0;
13977 int is_stmt
= lh
->default_is_stmt
;
13978 int basic_block
= 0;
13979 int end_sequence
= 0;
13981 unsigned char op_index
= 0;
13983 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
13985 /* Start a subfile for the current file of the state machine. */
13986 /* lh->include_dirs and lh->file_names are 0-based, but the
13987 directory and file name numbers in the statement program
13989 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
13993 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13995 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
13998 /* Decode the table. */
13999 while (!end_sequence
)
14001 op_code
= read_1_byte (abfd
, line_ptr
);
14003 if (line_ptr
> line_end
)
14005 dwarf2_debug_line_missing_end_sequence_complaint ();
14009 if (op_code
>= lh
->opcode_base
)
14011 /* Special operand. */
14012 adj_opcode
= op_code
- lh
->opcode_base
;
14013 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
14014 / lh
->maximum_ops_per_instruction
)
14015 * lh
->minimum_instruction_length
);
14016 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
14017 % lh
->maximum_ops_per_instruction
);
14018 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
14019 if (lh
->num_file_names
< file
|| file
== 0)
14020 dwarf2_debug_line_missing_file_complaint ();
14021 /* For now we ignore lines not starting on an
14022 instruction boundary. */
14023 else if (op_index
== 0)
14025 lh
->file_names
[file
- 1].included_p
= 1;
14026 if (!decode_for_pst_p
&& is_stmt
)
14028 if (last_subfile
!= current_subfile
)
14030 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14032 (*p_record_line
) (last_subfile
, 0, addr
);
14033 last_subfile
= current_subfile
;
14035 /* Append row to matrix using current values. */
14036 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14037 (*p_record_line
) (current_subfile
, line
, addr
);
14042 else switch (op_code
)
14044 case DW_LNS_extended_op
:
14045 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
14047 line_ptr
+= bytes_read
;
14048 extended_end
= line_ptr
+ extended_len
;
14049 extended_op
= read_1_byte (abfd
, line_ptr
);
14051 switch (extended_op
)
14053 case DW_LNE_end_sequence
:
14054 p_record_line
= record_line
;
14057 case DW_LNE_set_address
:
14058 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
14060 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14062 /* This line table is for a function which has been
14063 GCd by the linker. Ignore it. PR gdb/12528 */
14066 = line_ptr
- dwarf2_per_objfile
->line
.buffer
;
14068 complaint (&symfile_complaints
,
14069 _(".debug_line address at offset 0x%lx is 0 "
14071 line_offset
, objfile
->name
);
14072 p_record_line
= noop_record_line
;
14076 line_ptr
+= bytes_read
;
14077 address
+= baseaddr
;
14079 case DW_LNE_define_file
:
14082 unsigned int dir_index
, mod_time
, length
;
14084 cur_file
= read_direct_string (abfd
, line_ptr
,
14086 line_ptr
+= bytes_read
;
14088 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14089 line_ptr
+= bytes_read
;
14091 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14092 line_ptr
+= bytes_read
;
14094 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14095 line_ptr
+= bytes_read
;
14096 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
14099 case DW_LNE_set_discriminator
:
14100 /* The discriminator is not interesting to the debugger;
14102 line_ptr
= extended_end
;
14105 complaint (&symfile_complaints
,
14106 _("mangled .debug_line section"));
14109 /* Make sure that we parsed the extended op correctly. If e.g.
14110 we expected a different address size than the producer used,
14111 we may have read the wrong number of bytes. */
14112 if (line_ptr
!= extended_end
)
14114 complaint (&symfile_complaints
,
14115 _("mangled .debug_line section"));
14120 if (lh
->num_file_names
< file
|| file
== 0)
14121 dwarf2_debug_line_missing_file_complaint ();
14124 lh
->file_names
[file
- 1].included_p
= 1;
14125 if (!decode_for_pst_p
&& is_stmt
)
14127 if (last_subfile
!= current_subfile
)
14129 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14131 (*p_record_line
) (last_subfile
, 0, addr
);
14132 last_subfile
= current_subfile
;
14134 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14135 (*p_record_line
) (current_subfile
, line
, addr
);
14140 case DW_LNS_advance_pc
:
14143 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14145 address
+= (((op_index
+ adjust
)
14146 / lh
->maximum_ops_per_instruction
)
14147 * lh
->minimum_instruction_length
);
14148 op_index
= ((op_index
+ adjust
)
14149 % lh
->maximum_ops_per_instruction
);
14150 line_ptr
+= bytes_read
;
14153 case DW_LNS_advance_line
:
14154 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
14155 line_ptr
+= bytes_read
;
14157 case DW_LNS_set_file
:
14159 /* The arrays lh->include_dirs and lh->file_names are
14160 0-based, but the directory and file name numbers in
14161 the statement program are 1-based. */
14162 struct file_entry
*fe
;
14165 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14166 line_ptr
+= bytes_read
;
14167 if (lh
->num_file_names
< file
|| file
== 0)
14168 dwarf2_debug_line_missing_file_complaint ();
14171 fe
= &lh
->file_names
[file
- 1];
14173 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
14174 if (!decode_for_pst_p
)
14176 last_subfile
= current_subfile
;
14177 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
14182 case DW_LNS_set_column
:
14183 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14184 line_ptr
+= bytes_read
;
14186 case DW_LNS_negate_stmt
:
14187 is_stmt
= (!is_stmt
);
14189 case DW_LNS_set_basic_block
:
14192 /* Add to the address register of the state machine the
14193 address increment value corresponding to special opcode
14194 255. I.e., this value is scaled by the minimum
14195 instruction length since special opcode 255 would have
14196 scaled the increment. */
14197 case DW_LNS_const_add_pc
:
14199 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
14201 address
+= (((op_index
+ adjust
)
14202 / lh
->maximum_ops_per_instruction
)
14203 * lh
->minimum_instruction_length
);
14204 op_index
= ((op_index
+ adjust
)
14205 % lh
->maximum_ops_per_instruction
);
14208 case DW_LNS_fixed_advance_pc
:
14209 address
+= read_2_bytes (abfd
, line_ptr
);
14215 /* Unknown standard opcode, ignore it. */
14218 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
14220 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14221 line_ptr
+= bytes_read
;
14226 if (lh
->num_file_names
< file
|| file
== 0)
14227 dwarf2_debug_line_missing_file_complaint ();
14230 lh
->file_names
[file
- 1].included_p
= 1;
14231 if (!decode_for_pst_p
)
14233 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14234 (*p_record_line
) (current_subfile
, 0, addr
);
14240 /* Decode the Line Number Program (LNP) for the given line_header
14241 structure and CU. The actual information extracted and the type
14242 of structures created from the LNP depends on the value of PST.
14244 1. If PST is NULL, then this procedure uses the data from the program
14245 to create all necessary symbol tables, and their linetables.
14247 2. If PST is not NULL, this procedure reads the program to determine
14248 the list of files included by the unit represented by PST, and
14249 builds all the associated partial symbol tables.
14251 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
14252 It is used for relative paths in the line table.
14253 NOTE: When processing partial symtabs (pst != NULL),
14254 comp_dir == pst->dirname.
14256 NOTE: It is important that psymtabs have the same file name (via strcmp)
14257 as the corresponding symtab. Since COMP_DIR is not used in the name of the
14258 symtab we don't use it in the name of the psymtabs we create.
14259 E.g. expand_line_sal requires this when finding psymtabs to expand.
14260 A good testcase for this is mb-inline.exp. */
14263 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
14264 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
14265 int want_line_info
)
14267 struct objfile
*objfile
= cu
->objfile
;
14268 const int decode_for_pst_p
= (pst
!= NULL
);
14269 struct subfile
*first_subfile
= current_subfile
;
14271 if (want_line_info
)
14272 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
14274 if (decode_for_pst_p
)
14278 /* Now that we're done scanning the Line Header Program, we can
14279 create the psymtab of each included file. */
14280 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
14281 if (lh
->file_names
[file_index
].included_p
== 1)
14283 char *include_name
=
14284 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
14285 if (include_name
!= NULL
)
14286 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
14291 /* Make sure a symtab is created for every file, even files
14292 which contain only variables (i.e. no code with associated
14296 for (i
= 0; i
< lh
->num_file_names
; i
++)
14299 struct file_entry
*fe
;
14301 fe
= &lh
->file_names
[i
];
14303 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
14304 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
14306 /* Skip the main file; we don't need it, and it must be
14307 allocated last, so that it will show up before the
14308 non-primary symtabs in the objfile's symtab list. */
14309 if (current_subfile
== first_subfile
)
14312 if (current_subfile
->symtab
== NULL
)
14313 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
14315 fe
->symtab
= current_subfile
->symtab
;
14320 /* Start a subfile for DWARF. FILENAME is the name of the file and
14321 DIRNAME the name of the source directory which contains FILENAME
14322 or NULL if not known. COMP_DIR is the compilation directory for the
14323 linetable's compilation unit or NULL if not known.
14324 This routine tries to keep line numbers from identical absolute and
14325 relative file names in a common subfile.
14327 Using the `list' example from the GDB testsuite, which resides in
14328 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
14329 of /srcdir/list0.c yields the following debugging information for list0.c:
14331 DW_AT_name: /srcdir/list0.c
14332 DW_AT_comp_dir: /compdir
14333 files.files[0].name: list0.h
14334 files.files[0].dir: /srcdir
14335 files.files[1].name: list0.c
14336 files.files[1].dir: /srcdir
14338 The line number information for list0.c has to end up in a single
14339 subfile, so that `break /srcdir/list0.c:1' works as expected.
14340 start_subfile will ensure that this happens provided that we pass the
14341 concatenation of files.files[1].dir and files.files[1].name as the
14345 dwarf2_start_subfile (char *filename
, const char *dirname
,
14346 const char *comp_dir
)
14350 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
14351 `start_symtab' will always pass the contents of DW_AT_comp_dir as
14352 second argument to start_subfile. To be consistent, we do the
14353 same here. In order not to lose the line information directory,
14354 we concatenate it to the filename when it makes sense.
14355 Note that the Dwarf3 standard says (speaking of filenames in line
14356 information): ``The directory index is ignored for file names
14357 that represent full path names''. Thus ignoring dirname in the
14358 `else' branch below isn't an issue. */
14360 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
14361 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
14363 fullname
= filename
;
14365 start_subfile (fullname
, comp_dir
);
14367 if (fullname
!= filename
)
14371 /* Start a symtab for DWARF.
14372 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
14375 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
14376 char *name
, char *comp_dir
, CORE_ADDR low_pc
)
14378 start_symtab (name
, comp_dir
, low_pc
);
14379 record_debugformat ("DWARF 2");
14380 record_producer (cu
->producer
);
14382 /* We assume that we're processing GCC output. */
14383 processing_gcc_compilation
= 2;
14385 processing_has_namespace_info
= 0;
14389 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
14390 struct dwarf2_cu
*cu
)
14392 struct objfile
*objfile
= cu
->objfile
;
14393 struct comp_unit_head
*cu_header
= &cu
->header
;
14395 /* NOTE drow/2003-01-30: There used to be a comment and some special
14396 code here to turn a symbol with DW_AT_external and a
14397 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
14398 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
14399 with some versions of binutils) where shared libraries could have
14400 relocations against symbols in their debug information - the
14401 minimal symbol would have the right address, but the debug info
14402 would not. It's no longer necessary, because we will explicitly
14403 apply relocations when we read in the debug information now. */
14405 /* A DW_AT_location attribute with no contents indicates that a
14406 variable has been optimized away. */
14407 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
14409 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
14413 /* Handle one degenerate form of location expression specially, to
14414 preserve GDB's previous behavior when section offsets are
14415 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
14416 then mark this symbol as LOC_STATIC. */
14418 if (attr_form_is_block (attr
)
14419 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
14420 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
14421 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
14422 && (DW_BLOCK (attr
)->size
14423 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
14425 unsigned int dummy
;
14427 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
14428 SYMBOL_VALUE_ADDRESS (sym
) =
14429 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
14431 SYMBOL_VALUE_ADDRESS (sym
) =
14432 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
14433 SYMBOL_CLASS (sym
) = LOC_STATIC
;
14434 fixup_symbol_section (sym
, objfile
);
14435 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
14436 SYMBOL_SECTION (sym
));
14440 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
14441 expression evaluator, and use LOC_COMPUTED only when necessary
14442 (i.e. when the value of a register or memory location is
14443 referenced, or a thread-local block, etc.). Then again, it might
14444 not be worthwhile. I'm assuming that it isn't unless performance
14445 or memory numbers show me otherwise. */
14447 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
14448 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
14450 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
14451 cu
->has_loclist
= 1;
14454 /* Given a pointer to a DWARF information entry, figure out if we need
14455 to make a symbol table entry for it, and if so, create a new entry
14456 and return a pointer to it.
14457 If TYPE is NULL, determine symbol type from the die, otherwise
14458 used the passed type.
14459 If SPACE is not NULL, use it to hold the new symbol. If it is
14460 NULL, allocate a new symbol on the objfile's obstack. */
14462 static struct symbol
*
14463 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
14464 struct symbol
*space
)
14466 struct objfile
*objfile
= cu
->objfile
;
14467 struct symbol
*sym
= NULL
;
14469 struct attribute
*attr
= NULL
;
14470 struct attribute
*attr2
= NULL
;
14471 CORE_ADDR baseaddr
;
14472 struct pending
**list_to_add
= NULL
;
14474 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
14476 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14478 name
= dwarf2_name (die
, cu
);
14481 const char *linkagename
;
14482 int suppress_add
= 0;
14487 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
14488 OBJSTAT (objfile
, n_syms
++);
14490 /* Cache this symbol's name and the name's demangled form (if any). */
14491 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
14492 linkagename
= dwarf2_physname (name
, die
, cu
);
14493 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
14495 /* Fortran does not have mangling standard and the mangling does differ
14496 between gfortran, iFort etc. */
14497 if (cu
->language
== language_fortran
14498 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
14499 symbol_set_demangled_name (&(sym
->ginfo
),
14500 (char *) dwarf2_full_name (name
, die
, cu
),
14503 /* Default assumptions.
14504 Use the passed type or decode it from the die. */
14505 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
14506 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
14508 SYMBOL_TYPE (sym
) = type
;
14510 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
14511 attr
= dwarf2_attr (die
,
14512 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
14516 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
14519 attr
= dwarf2_attr (die
,
14520 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
14524 int file_index
= DW_UNSND (attr
);
14526 if (cu
->line_header
== NULL
14527 || file_index
> cu
->line_header
->num_file_names
)
14528 complaint (&symfile_complaints
,
14529 _("file index out of range"));
14530 else if (file_index
> 0)
14532 struct file_entry
*fe
;
14534 fe
= &cu
->line_header
->file_names
[file_index
- 1];
14535 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
14542 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14545 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
14547 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
14548 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
14549 SYMBOL_CLASS (sym
) = LOC_LABEL
;
14550 add_symbol_to_list (sym
, cu
->list_in_scope
);
14552 case DW_TAG_subprogram
:
14553 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
14555 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
14556 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
14557 if ((attr2
&& (DW_UNSND (attr2
) != 0))
14558 || cu
->language
== language_ada
)
14560 /* Subprograms marked external are stored as a global symbol.
14561 Ada subprograms, whether marked external or not, are always
14562 stored as a global symbol, because we want to be able to
14563 access them globally. For instance, we want to be able
14564 to break on a nested subprogram without having to
14565 specify the context. */
14566 list_to_add
= &global_symbols
;
14570 list_to_add
= cu
->list_in_scope
;
14573 case DW_TAG_inlined_subroutine
:
14574 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
14576 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
14577 SYMBOL_INLINED (sym
) = 1;
14578 list_to_add
= cu
->list_in_scope
;
14580 case DW_TAG_template_value_param
:
14582 /* Fall through. */
14583 case DW_TAG_constant
:
14584 case DW_TAG_variable
:
14585 case DW_TAG_member
:
14586 /* Compilation with minimal debug info may result in
14587 variables with missing type entries. Change the
14588 misleading `void' type to something sensible. */
14589 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
14591 = objfile_type (objfile
)->nodebug_data_symbol
;
14593 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14594 /* In the case of DW_TAG_member, we should only be called for
14595 static const members. */
14596 if (die
->tag
== DW_TAG_member
)
14598 /* dwarf2_add_field uses die_is_declaration,
14599 so we do the same. */
14600 gdb_assert (die_is_declaration (die
, cu
));
14605 dwarf2_const_value (attr
, sym
, cu
);
14606 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
14609 if (attr2
&& (DW_UNSND (attr2
) != 0))
14610 list_to_add
= &global_symbols
;
14612 list_to_add
= cu
->list_in_scope
;
14616 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
14619 var_decode_location (attr
, sym
, cu
);
14620 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
14621 if (SYMBOL_CLASS (sym
) == LOC_STATIC
14622 && SYMBOL_VALUE_ADDRESS (sym
) == 0
14623 && !dwarf2_per_objfile
->has_section_at_zero
)
14625 /* When a static variable is eliminated by the linker,
14626 the corresponding debug information is not stripped
14627 out, but the variable address is set to null;
14628 do not add such variables into symbol table. */
14630 else if (attr2
&& (DW_UNSND (attr2
) != 0))
14632 /* Workaround gfortran PR debug/40040 - it uses
14633 DW_AT_location for variables in -fPIC libraries which may
14634 get overriden by other libraries/executable and get
14635 a different address. Resolve it by the minimal symbol
14636 which may come from inferior's executable using copy
14637 relocation. Make this workaround only for gfortran as for
14638 other compilers GDB cannot guess the minimal symbol
14639 Fortran mangling kind. */
14640 if (cu
->language
== language_fortran
&& die
->parent
14641 && die
->parent
->tag
== DW_TAG_module
14643 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
14644 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
14646 /* A variable with DW_AT_external is never static,
14647 but it may be block-scoped. */
14648 list_to_add
= (cu
->list_in_scope
== &file_symbols
14649 ? &global_symbols
: cu
->list_in_scope
);
14652 list_to_add
= cu
->list_in_scope
;
14656 /* We do not know the address of this symbol.
14657 If it is an external symbol and we have type information
14658 for it, enter the symbol as a LOC_UNRESOLVED symbol.
14659 The address of the variable will then be determined from
14660 the minimal symbol table whenever the variable is
14662 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
14663 if (attr2
&& (DW_UNSND (attr2
) != 0)
14664 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
14666 /* A variable with DW_AT_external is never static, but it
14667 may be block-scoped. */
14668 list_to_add
= (cu
->list_in_scope
== &file_symbols
14669 ? &global_symbols
: cu
->list_in_scope
);
14671 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
14673 else if (!die_is_declaration (die
, cu
))
14675 /* Use the default LOC_OPTIMIZED_OUT class. */
14676 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
14678 list_to_add
= cu
->list_in_scope
;
14682 case DW_TAG_formal_parameter
:
14683 /* If we are inside a function, mark this as an argument. If
14684 not, we might be looking at an argument to an inlined function
14685 when we do not have enough information to show inlined frames;
14686 pretend it's a local variable in that case so that the user can
14688 if (context_stack_depth
> 0
14689 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
14690 SYMBOL_IS_ARGUMENT (sym
) = 1;
14691 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
14694 var_decode_location (attr
, sym
, cu
);
14696 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14699 dwarf2_const_value (attr
, sym
, cu
);
14702 list_to_add
= cu
->list_in_scope
;
14704 case DW_TAG_unspecified_parameters
:
14705 /* From varargs functions; gdb doesn't seem to have any
14706 interest in this information, so just ignore it for now.
14709 case DW_TAG_template_type_param
:
14711 /* Fall through. */
14712 case DW_TAG_class_type
:
14713 case DW_TAG_interface_type
:
14714 case DW_TAG_structure_type
:
14715 case DW_TAG_union_type
:
14716 case DW_TAG_set_type
:
14717 case DW_TAG_enumeration_type
:
14718 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
14719 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
14722 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
14723 really ever be static objects: otherwise, if you try
14724 to, say, break of a class's method and you're in a file
14725 which doesn't mention that class, it won't work unless
14726 the check for all static symbols in lookup_symbol_aux
14727 saves you. See the OtherFileClass tests in
14728 gdb.c++/namespace.exp. */
14732 list_to_add
= (cu
->list_in_scope
== &file_symbols
14733 && (cu
->language
== language_cplus
14734 || cu
->language
== language_java
)
14735 ? &global_symbols
: cu
->list_in_scope
);
14737 /* The semantics of C++ state that "struct foo {
14738 ... }" also defines a typedef for "foo". A Java
14739 class declaration also defines a typedef for the
14741 if (cu
->language
== language_cplus
14742 || cu
->language
== language_java
14743 || cu
->language
== language_ada
)
14745 /* The symbol's name is already allocated along
14746 with this objfile, so we don't need to
14747 duplicate it for the type. */
14748 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
14749 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
14754 case DW_TAG_typedef
:
14755 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
14756 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
14757 list_to_add
= cu
->list_in_scope
;
14759 case DW_TAG_base_type
:
14760 case DW_TAG_subrange_type
:
14761 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
14762 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
14763 list_to_add
= cu
->list_in_scope
;
14765 case DW_TAG_enumerator
:
14766 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14769 dwarf2_const_value (attr
, sym
, cu
);
14772 /* NOTE: carlton/2003-11-10: See comment above in the
14773 DW_TAG_class_type, etc. block. */
14775 list_to_add
= (cu
->list_in_scope
== &file_symbols
14776 && (cu
->language
== language_cplus
14777 || cu
->language
== language_java
)
14778 ? &global_symbols
: cu
->list_in_scope
);
14781 case DW_TAG_namespace
:
14782 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
14783 list_to_add
= &global_symbols
;
14786 /* Not a tag we recognize. Hopefully we aren't processing
14787 trash data, but since we must specifically ignore things
14788 we don't recognize, there is nothing else we should do at
14790 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
14791 dwarf_tag_name (die
->tag
));
14797 sym
->hash_next
= objfile
->template_symbols
;
14798 objfile
->template_symbols
= sym
;
14799 list_to_add
= NULL
;
14802 if (list_to_add
!= NULL
)
14803 add_symbol_to_list (sym
, list_to_add
);
14805 /* For the benefit of old versions of GCC, check for anonymous
14806 namespaces based on the demangled name. */
14807 if (!processing_has_namespace_info
14808 && cu
->language
== language_cplus
)
14809 cp_scan_for_anonymous_namespaces (sym
, objfile
);
14814 /* A wrapper for new_symbol_full that always allocates a new symbol. */
14816 static struct symbol
*
14817 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
14819 return new_symbol_full (die
, type
, cu
, NULL
);
14822 /* Given an attr with a DW_FORM_dataN value in host byte order,
14823 zero-extend it as appropriate for the symbol's type. The DWARF
14824 standard (v4) is not entirely clear about the meaning of using
14825 DW_FORM_dataN for a constant with a signed type, where the type is
14826 wider than the data. The conclusion of a discussion on the DWARF
14827 list was that this is unspecified. We choose to always zero-extend
14828 because that is the interpretation long in use by GCC. */
14831 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
14832 const char *name
, struct obstack
*obstack
,
14833 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
14835 struct objfile
*objfile
= cu
->objfile
;
14836 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
14837 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
14838 LONGEST l
= DW_UNSND (attr
);
14840 if (bits
< sizeof (*value
) * 8)
14842 l
&= ((LONGEST
) 1 << bits
) - 1;
14845 else if (bits
== sizeof (*value
) * 8)
14849 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
14850 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
14857 /* Read a constant value from an attribute. Either set *VALUE, or if
14858 the value does not fit in *VALUE, set *BYTES - either already
14859 allocated on the objfile obstack, or newly allocated on OBSTACK,
14860 or, set *BATON, if we translated the constant to a location
14864 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
14865 const char *name
, struct obstack
*obstack
,
14866 struct dwarf2_cu
*cu
,
14867 LONGEST
*value
, gdb_byte
**bytes
,
14868 struct dwarf2_locexpr_baton
**baton
)
14870 struct objfile
*objfile
= cu
->objfile
;
14871 struct comp_unit_head
*cu_header
= &cu
->header
;
14872 struct dwarf_block
*blk
;
14873 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
14874 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
14880 switch (attr
->form
)
14883 case DW_FORM_GNU_addr_index
:
14887 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
14888 dwarf2_const_value_length_mismatch_complaint (name
,
14889 cu_header
->addr_size
,
14890 TYPE_LENGTH (type
));
14891 /* Symbols of this form are reasonably rare, so we just
14892 piggyback on the existing location code rather than writing
14893 a new implementation of symbol_computed_ops. */
14894 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
14895 sizeof (struct dwarf2_locexpr_baton
));
14896 (*baton
)->per_cu
= cu
->per_cu
;
14897 gdb_assert ((*baton
)->per_cu
);
14899 (*baton
)->size
= 2 + cu_header
->addr_size
;
14900 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
14901 (*baton
)->data
= data
;
14903 data
[0] = DW_OP_addr
;
14904 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
14905 byte_order
, DW_ADDR (attr
));
14906 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
14909 case DW_FORM_string
:
14911 case DW_FORM_GNU_str_index
:
14912 /* DW_STRING is already allocated on the objfile obstack, point
14914 *bytes
= (gdb_byte
*) DW_STRING (attr
);
14916 case DW_FORM_block1
:
14917 case DW_FORM_block2
:
14918 case DW_FORM_block4
:
14919 case DW_FORM_block
:
14920 case DW_FORM_exprloc
:
14921 blk
= DW_BLOCK (attr
);
14922 if (TYPE_LENGTH (type
) != blk
->size
)
14923 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
14924 TYPE_LENGTH (type
));
14925 *bytes
= blk
->data
;
14928 /* The DW_AT_const_value attributes are supposed to carry the
14929 symbol's value "represented as it would be on the target
14930 architecture." By the time we get here, it's already been
14931 converted to host endianness, so we just need to sign- or
14932 zero-extend it as appropriate. */
14933 case DW_FORM_data1
:
14934 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
14935 obstack
, cu
, value
, 8);
14937 case DW_FORM_data2
:
14938 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
14939 obstack
, cu
, value
, 16);
14941 case DW_FORM_data4
:
14942 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
14943 obstack
, cu
, value
, 32);
14945 case DW_FORM_data8
:
14946 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
14947 obstack
, cu
, value
, 64);
14950 case DW_FORM_sdata
:
14951 *value
= DW_SND (attr
);
14954 case DW_FORM_udata
:
14955 *value
= DW_UNSND (attr
);
14959 complaint (&symfile_complaints
,
14960 _("unsupported const value attribute form: '%s'"),
14961 dwarf_form_name (attr
->form
));
14968 /* Copy constant value from an attribute to a symbol. */
14971 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
14972 struct dwarf2_cu
*cu
)
14974 struct objfile
*objfile
= cu
->objfile
;
14975 struct comp_unit_head
*cu_header
= &cu
->header
;
14978 struct dwarf2_locexpr_baton
*baton
;
14980 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
14981 SYMBOL_PRINT_NAME (sym
),
14982 &objfile
->objfile_obstack
, cu
,
14983 &value
, &bytes
, &baton
);
14987 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
14988 SYMBOL_LOCATION_BATON (sym
) = baton
;
14989 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
14991 else if (bytes
!= NULL
)
14993 SYMBOL_VALUE_BYTES (sym
) = bytes
;
14994 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
14998 SYMBOL_VALUE (sym
) = value
;
14999 SYMBOL_CLASS (sym
) = LOC_CONST
;
15003 /* Return the type of the die in question using its DW_AT_type attribute. */
15005 static struct type
*
15006 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15008 struct attribute
*type_attr
;
15010 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
15013 /* A missing DW_AT_type represents a void type. */
15014 return objfile_type (cu
->objfile
)->builtin_void
;
15017 return lookup_die_type (die
, type_attr
, cu
);
15020 /* True iff CU's producer generates GNAT Ada auxiliary information
15021 that allows to find parallel types through that information instead
15022 of having to do expensive parallel lookups by type name. */
15025 need_gnat_info (struct dwarf2_cu
*cu
)
15027 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
15028 of GNAT produces this auxiliary information, without any indication
15029 that it is produced. Part of enhancing the FSF version of GNAT
15030 to produce that information will be to put in place an indicator
15031 that we can use in order to determine whether the descriptive type
15032 info is available or not. One suggestion that has been made is
15033 to use a new attribute, attached to the CU die. For now, assume
15034 that the descriptive type info is not available. */
15038 /* Return the auxiliary type of the die in question using its
15039 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
15040 attribute is not present. */
15042 static struct type
*
15043 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15045 struct attribute
*type_attr
;
15047 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
15051 return lookup_die_type (die
, type_attr
, cu
);
15054 /* If DIE has a descriptive_type attribute, then set the TYPE's
15055 descriptive type accordingly. */
15058 set_descriptive_type (struct type
*type
, struct die_info
*die
,
15059 struct dwarf2_cu
*cu
)
15061 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
15063 if (descriptive_type
)
15065 ALLOCATE_GNAT_AUX_TYPE (type
);
15066 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
15070 /* Return the containing type of the die in question using its
15071 DW_AT_containing_type attribute. */
15073 static struct type
*
15074 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15076 struct attribute
*type_attr
;
15078 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
15080 error (_("Dwarf Error: Problem turning containing type into gdb type "
15081 "[in module %s]"), cu
->objfile
->name
);
15083 return lookup_die_type (die
, type_attr
, cu
);
15086 /* Look up the type of DIE in CU using its type attribute ATTR.
15087 If there is no type substitute an error marker. */
15089 static struct type
*
15090 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
15091 struct dwarf2_cu
*cu
)
15093 struct objfile
*objfile
= cu
->objfile
;
15094 struct type
*this_type
;
15096 /* First see if we have it cached. */
15098 if (is_ref_attr (attr
))
15100 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
15102 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
15104 else if (attr
->form
== DW_FORM_ref_sig8
)
15106 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
15108 /* sig_type will be NULL if the signatured type is missing from
15110 if (sig_type
== NULL
)
15111 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
15112 "at 0x%x [in module %s]"),
15113 die
->offset
.sect_off
, objfile
->name
);
15115 gdb_assert (sig_type
->per_cu
.is_debug_types
);
15116 /* If we haven't filled in type_offset_in_section yet, then we
15117 haven't read the type in yet. */
15119 if (sig_type
->type_offset_in_section
.sect_off
!= 0)
15122 get_die_type_at_offset (sig_type
->type_offset_in_section
,
15123 &sig_type
->per_cu
);
15128 dump_die_for_error (die
);
15129 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
15130 dwarf_attr_name (attr
->name
), objfile
->name
);
15133 /* If not cached we need to read it in. */
15135 if (this_type
== NULL
)
15137 struct die_info
*type_die
;
15138 struct dwarf2_cu
*type_cu
= cu
;
15140 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
15141 /* If we found the type now, it's probably because the type came
15142 from an inter-CU reference and the type's CU got expanded before
15144 this_type
= get_die_type (type_die
, type_cu
);
15145 if (this_type
== NULL
)
15146 this_type
= read_type_die_1 (type_die
, type_cu
);
15149 /* If we still don't have a type use an error marker. */
15151 if (this_type
== NULL
)
15153 char *message
, *saved
;
15155 /* read_type_die already issued a complaint. */
15156 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
15158 cu
->header
.offset
.sect_off
,
15159 die
->offset
.sect_off
);
15160 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
15161 message
, strlen (message
));
15164 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
15170 /* Return the type in DIE, CU.
15171 Returns NULL for invalid types.
15173 This first does a lookup in the appropriate type_hash table,
15174 and only reads the die in if necessary.
15176 NOTE: This can be called when reading in partial or full symbols. */
15178 static struct type
*
15179 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
15181 struct type
*this_type
;
15183 this_type
= get_die_type (die
, cu
);
15187 return read_type_die_1 (die
, cu
);
15190 /* Read the type in DIE, CU.
15191 Returns NULL for invalid types. */
15193 static struct type
*
15194 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
15196 struct type
*this_type
= NULL
;
15200 case DW_TAG_class_type
:
15201 case DW_TAG_interface_type
:
15202 case DW_TAG_structure_type
:
15203 case DW_TAG_union_type
:
15204 this_type
= read_structure_type (die
, cu
);
15206 case DW_TAG_enumeration_type
:
15207 this_type
= read_enumeration_type (die
, cu
);
15209 case DW_TAG_subprogram
:
15210 case DW_TAG_subroutine_type
:
15211 case DW_TAG_inlined_subroutine
:
15212 this_type
= read_subroutine_type (die
, cu
);
15214 case DW_TAG_array_type
:
15215 this_type
= read_array_type (die
, cu
);
15217 case DW_TAG_set_type
:
15218 this_type
= read_set_type (die
, cu
);
15220 case DW_TAG_pointer_type
:
15221 this_type
= read_tag_pointer_type (die
, cu
);
15223 case DW_TAG_ptr_to_member_type
:
15224 this_type
= read_tag_ptr_to_member_type (die
, cu
);
15226 case DW_TAG_reference_type
:
15227 this_type
= read_tag_reference_type (die
, cu
);
15229 case DW_TAG_const_type
:
15230 this_type
= read_tag_const_type (die
, cu
);
15232 case DW_TAG_volatile_type
:
15233 this_type
= read_tag_volatile_type (die
, cu
);
15235 case DW_TAG_string_type
:
15236 this_type
= read_tag_string_type (die
, cu
);
15238 case DW_TAG_typedef
:
15239 this_type
= read_typedef (die
, cu
);
15241 case DW_TAG_subrange_type
:
15242 this_type
= read_subrange_type (die
, cu
);
15244 case DW_TAG_base_type
:
15245 this_type
= read_base_type (die
, cu
);
15247 case DW_TAG_unspecified_type
:
15248 this_type
= read_unspecified_type (die
, cu
);
15250 case DW_TAG_namespace
:
15251 this_type
= read_namespace_type (die
, cu
);
15253 case DW_TAG_module
:
15254 this_type
= read_module_type (die
, cu
);
15257 complaint (&symfile_complaints
,
15258 _("unexpected tag in read_type_die: '%s'"),
15259 dwarf_tag_name (die
->tag
));
15266 /* See if we can figure out if the class lives in a namespace. We do
15267 this by looking for a member function; its demangled name will
15268 contain namespace info, if there is any.
15269 Return the computed name or NULL.
15270 Space for the result is allocated on the objfile's obstack.
15271 This is the full-die version of guess_partial_die_structure_name.
15272 In this case we know DIE has no useful parent. */
15275 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
15277 struct die_info
*spec_die
;
15278 struct dwarf2_cu
*spec_cu
;
15279 struct die_info
*child
;
15282 spec_die
= die_specification (die
, &spec_cu
);
15283 if (spec_die
!= NULL
)
15289 for (child
= die
->child
;
15291 child
= child
->sibling
)
15293 if (child
->tag
== DW_TAG_subprogram
)
15295 struct attribute
*attr
;
15297 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
15299 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
15303 = language_class_name_from_physname (cu
->language_defn
,
15307 if (actual_name
!= NULL
)
15309 char *die_name
= dwarf2_name (die
, cu
);
15311 if (die_name
!= NULL
15312 && strcmp (die_name
, actual_name
) != 0)
15314 /* Strip off the class name from the full name.
15315 We want the prefix. */
15316 int die_name_len
= strlen (die_name
);
15317 int actual_name_len
= strlen (actual_name
);
15319 /* Test for '::' as a sanity check. */
15320 if (actual_name_len
> die_name_len
+ 2
15321 && actual_name
[actual_name_len
15322 - die_name_len
- 1] == ':')
15324 obsavestring (actual_name
,
15325 actual_name_len
- die_name_len
- 2,
15326 &cu
->objfile
->objfile_obstack
);
15329 xfree (actual_name
);
15338 /* GCC might emit a nameless typedef that has a linkage name. Determine the
15339 prefix part in such case. See
15340 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
15343 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
15345 struct attribute
*attr
;
15348 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
15349 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
15352 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
15353 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
15356 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
15358 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
15359 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
15362 /* dwarf2_name had to be already called. */
15363 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
15365 /* Strip the base name, keep any leading namespaces/classes. */
15366 base
= strrchr (DW_STRING (attr
), ':');
15367 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
15370 return obsavestring (DW_STRING (attr
), &base
[-1] - DW_STRING (attr
),
15371 &cu
->objfile
->objfile_obstack
);
15374 /* Return the name of the namespace/class that DIE is defined within,
15375 or "" if we can't tell. The caller should not xfree the result.
15377 For example, if we're within the method foo() in the following
15387 then determine_prefix on foo's die will return "N::C". */
15389 static const char *
15390 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
15392 struct die_info
*parent
, *spec_die
;
15393 struct dwarf2_cu
*spec_cu
;
15394 struct type
*parent_type
;
15397 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
15398 && cu
->language
!= language_fortran
)
15401 retval
= anonymous_struct_prefix (die
, cu
);
15405 /* We have to be careful in the presence of DW_AT_specification.
15406 For example, with GCC 3.4, given the code
15410 // Definition of N::foo.
15414 then we'll have a tree of DIEs like this:
15416 1: DW_TAG_compile_unit
15417 2: DW_TAG_namespace // N
15418 3: DW_TAG_subprogram // declaration of N::foo
15419 4: DW_TAG_subprogram // definition of N::foo
15420 DW_AT_specification // refers to die #3
15422 Thus, when processing die #4, we have to pretend that we're in
15423 the context of its DW_AT_specification, namely the contex of die
15426 spec_die
= die_specification (die
, &spec_cu
);
15427 if (spec_die
== NULL
)
15428 parent
= die
->parent
;
15431 parent
= spec_die
->parent
;
15435 if (parent
== NULL
)
15437 else if (parent
->building_fullname
)
15440 const char *parent_name
;
15442 /* It has been seen on RealView 2.2 built binaries,
15443 DW_TAG_template_type_param types actually _defined_ as
15444 children of the parent class:
15447 template class <class Enum> Class{};
15448 Class<enum E> class_e;
15450 1: DW_TAG_class_type (Class)
15451 2: DW_TAG_enumeration_type (E)
15452 3: DW_TAG_enumerator (enum1:0)
15453 3: DW_TAG_enumerator (enum2:1)
15455 2: DW_TAG_template_type_param
15456 DW_AT_type DW_FORM_ref_udata (E)
15458 Besides being broken debug info, it can put GDB into an
15459 infinite loop. Consider:
15461 When we're building the full name for Class<E>, we'll start
15462 at Class, and go look over its template type parameters,
15463 finding E. We'll then try to build the full name of E, and
15464 reach here. We're now trying to build the full name of E,
15465 and look over the parent DIE for containing scope. In the
15466 broken case, if we followed the parent DIE of E, we'd again
15467 find Class, and once again go look at its template type
15468 arguments, etc., etc. Simply don't consider such parent die
15469 as source-level parent of this die (it can't be, the language
15470 doesn't allow it), and break the loop here. */
15471 name
= dwarf2_name (die
, cu
);
15472 parent_name
= dwarf2_name (parent
, cu
);
15473 complaint (&symfile_complaints
,
15474 _("template param type '%s' defined within parent '%s'"),
15475 name
? name
: "<unknown>",
15476 parent_name
? parent_name
: "<unknown>");
15480 switch (parent
->tag
)
15482 case DW_TAG_namespace
:
15483 parent_type
= read_type_die (parent
, cu
);
15484 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
15485 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
15486 Work around this problem here. */
15487 if (cu
->language
== language_cplus
15488 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
15490 /* We give a name to even anonymous namespaces. */
15491 return TYPE_TAG_NAME (parent_type
);
15492 case DW_TAG_class_type
:
15493 case DW_TAG_interface_type
:
15494 case DW_TAG_structure_type
:
15495 case DW_TAG_union_type
:
15496 case DW_TAG_module
:
15497 parent_type
= read_type_die (parent
, cu
);
15498 if (TYPE_TAG_NAME (parent_type
) != NULL
)
15499 return TYPE_TAG_NAME (parent_type
);
15501 /* An anonymous structure is only allowed non-static data
15502 members; no typedefs, no member functions, et cetera.
15503 So it does not need a prefix. */
15505 case DW_TAG_compile_unit
:
15506 case DW_TAG_partial_unit
:
15507 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
15508 if (cu
->language
== language_cplus
15509 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
15510 && die
->child
!= NULL
15511 && (die
->tag
== DW_TAG_class_type
15512 || die
->tag
== DW_TAG_structure_type
15513 || die
->tag
== DW_TAG_union_type
))
15515 char *name
= guess_full_die_structure_name (die
, cu
);
15521 return determine_prefix (parent
, cu
);
15525 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
15526 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
15527 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
15528 an obconcat, otherwise allocate storage for the result. The CU argument is
15529 used to determine the language and hence, the appropriate separator. */
15531 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
15534 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
15535 int physname
, struct dwarf2_cu
*cu
)
15537 const char *lead
= "";
15540 if (suffix
== NULL
|| suffix
[0] == '\0'
15541 || prefix
== NULL
|| prefix
[0] == '\0')
15543 else if (cu
->language
== language_java
)
15545 else if (cu
->language
== language_fortran
&& physname
)
15547 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
15548 DW_AT_MIPS_linkage_name is preferred and used instead. */
15556 if (prefix
== NULL
)
15558 if (suffix
== NULL
)
15564 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
15566 strcpy (retval
, lead
);
15567 strcat (retval
, prefix
);
15568 strcat (retval
, sep
);
15569 strcat (retval
, suffix
);
15574 /* We have an obstack. */
15575 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
15579 /* Return sibling of die, NULL if no sibling. */
15581 static struct die_info
*
15582 sibling_die (struct die_info
*die
)
15584 return die
->sibling
;
15587 /* Get name of a die, return NULL if not found. */
15590 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
15591 struct obstack
*obstack
)
15593 if (name
&& cu
->language
== language_cplus
)
15595 char *canon_name
= cp_canonicalize_string (name
);
15597 if (canon_name
!= NULL
)
15599 if (strcmp (canon_name
, name
) != 0)
15600 name
= obsavestring (canon_name
, strlen (canon_name
),
15602 xfree (canon_name
);
15609 /* Get name of a die, return NULL if not found. */
15612 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
15614 struct attribute
*attr
;
15616 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
15617 if ((!attr
|| !DW_STRING (attr
))
15618 && die
->tag
!= DW_TAG_class_type
15619 && die
->tag
!= DW_TAG_interface_type
15620 && die
->tag
!= DW_TAG_structure_type
15621 && die
->tag
!= DW_TAG_union_type
)
15626 case DW_TAG_compile_unit
:
15627 case DW_TAG_partial_unit
:
15628 /* Compilation units have a DW_AT_name that is a filename, not
15629 a source language identifier. */
15630 case DW_TAG_enumeration_type
:
15631 case DW_TAG_enumerator
:
15632 /* These tags always have simple identifiers already; no need
15633 to canonicalize them. */
15634 return DW_STRING (attr
);
15636 case DW_TAG_subprogram
:
15637 /* Java constructors will all be named "<init>", so return
15638 the class name when we see this special case. */
15639 if (cu
->language
== language_java
15640 && DW_STRING (attr
) != NULL
15641 && strcmp (DW_STRING (attr
), "<init>") == 0)
15643 struct dwarf2_cu
*spec_cu
= cu
;
15644 struct die_info
*spec_die
;
15646 /* GCJ will output '<init>' for Java constructor names.
15647 For this special case, return the name of the parent class. */
15649 /* GCJ may output suprogram DIEs with AT_specification set.
15650 If so, use the name of the specified DIE. */
15651 spec_die
= die_specification (die
, &spec_cu
);
15652 if (spec_die
!= NULL
)
15653 return dwarf2_name (spec_die
, spec_cu
);
15658 if (die
->tag
== DW_TAG_class_type
)
15659 return dwarf2_name (die
, cu
);
15661 while (die
->tag
!= DW_TAG_compile_unit
15662 && die
->tag
!= DW_TAG_partial_unit
);
15666 case DW_TAG_class_type
:
15667 case DW_TAG_interface_type
:
15668 case DW_TAG_structure_type
:
15669 case DW_TAG_union_type
:
15670 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
15671 structures or unions. These were of the form "._%d" in GCC 4.1,
15672 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
15673 and GCC 4.4. We work around this problem by ignoring these. */
15674 if (attr
&& DW_STRING (attr
)
15675 && (strncmp (DW_STRING (attr
), "._", 2) == 0
15676 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
15679 /* GCC might emit a nameless typedef that has a linkage name. See
15680 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
15681 if (!attr
|| DW_STRING (attr
) == NULL
)
15683 char *demangled
= NULL
;
15685 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
15687 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
15689 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
15692 /* Avoid demangling DW_STRING (attr) the second time on a second
15693 call for the same DIE. */
15694 if (!DW_STRING_IS_CANONICAL (attr
))
15695 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
15701 /* FIXME: we already did this for the partial symbol... */
15702 DW_STRING (attr
) = obsavestring (demangled
, strlen (demangled
),
15703 &cu
->objfile
->objfile_obstack
);
15704 DW_STRING_IS_CANONICAL (attr
) = 1;
15707 /* Strip any leading namespaces/classes, keep only the base name.
15708 DW_AT_name for named DIEs does not contain the prefixes. */
15709 base
= strrchr (DW_STRING (attr
), ':');
15710 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
15713 return DW_STRING (attr
);
15722 if (!DW_STRING_IS_CANONICAL (attr
))
15725 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
15726 &cu
->objfile
->objfile_obstack
);
15727 DW_STRING_IS_CANONICAL (attr
) = 1;
15729 return DW_STRING (attr
);
15732 /* Return the die that this die in an extension of, or NULL if there
15733 is none. *EXT_CU is the CU containing DIE on input, and the CU
15734 containing the return value on output. */
15736 static struct die_info
*
15737 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
15739 struct attribute
*attr
;
15741 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
15745 return follow_die_ref (die
, attr
, ext_cu
);
15748 /* Convert a DIE tag into its string name. */
15750 static const char *
15751 dwarf_tag_name (unsigned tag
)
15753 const char *name
= get_DW_TAG_name (tag
);
15756 return "DW_TAG_<unknown>";
15761 /* Convert a DWARF attribute code into its string name. */
15763 static const char *
15764 dwarf_attr_name (unsigned attr
)
15768 #ifdef MIPS /* collides with DW_AT_HP_block_index */
15769 if (attr
== DW_AT_MIPS_fde
)
15770 return "DW_AT_MIPS_fde";
15772 if (attr
== DW_AT_HP_block_index
)
15773 return "DW_AT_HP_block_index";
15776 name
= get_DW_AT_name (attr
);
15779 return "DW_AT_<unknown>";
15784 /* Convert a DWARF value form code into its string name. */
15786 static const char *
15787 dwarf_form_name (unsigned form
)
15789 const char *name
= get_DW_FORM_name (form
);
15792 return "DW_FORM_<unknown>";
15798 dwarf_bool_name (unsigned mybool
)
15806 /* Convert a DWARF type code into its string name. */
15808 static const char *
15809 dwarf_type_encoding_name (unsigned enc
)
15811 const char *name
= get_DW_ATE_name (enc
);
15814 return "DW_ATE_<unknown>";
15820 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
15824 print_spaces (indent
, f
);
15825 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
15826 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
15828 if (die
->parent
!= NULL
)
15830 print_spaces (indent
, f
);
15831 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
15832 die
->parent
->offset
.sect_off
);
15835 print_spaces (indent
, f
);
15836 fprintf_unfiltered (f
, " has children: %s\n",
15837 dwarf_bool_name (die
->child
!= NULL
));
15839 print_spaces (indent
, f
);
15840 fprintf_unfiltered (f
, " attributes:\n");
15842 for (i
= 0; i
< die
->num_attrs
; ++i
)
15844 print_spaces (indent
, f
);
15845 fprintf_unfiltered (f
, " %s (%s) ",
15846 dwarf_attr_name (die
->attrs
[i
].name
),
15847 dwarf_form_name (die
->attrs
[i
].form
));
15849 switch (die
->attrs
[i
].form
)
15852 case DW_FORM_GNU_addr_index
:
15853 fprintf_unfiltered (f
, "address: ");
15854 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
15856 case DW_FORM_block2
:
15857 case DW_FORM_block4
:
15858 case DW_FORM_block
:
15859 case DW_FORM_block1
:
15860 fprintf_unfiltered (f
, "block: size %d",
15861 DW_BLOCK (&die
->attrs
[i
])->size
);
15863 case DW_FORM_exprloc
:
15864 fprintf_unfiltered (f
, "expression: size %u",
15865 DW_BLOCK (&die
->attrs
[i
])->size
);
15867 case DW_FORM_ref_addr
:
15868 fprintf_unfiltered (f
, "ref address: ");
15869 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
15875 case DW_FORM_ref_udata
:
15876 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
15877 (long) (DW_UNSND (&die
->attrs
[i
])));
15879 case DW_FORM_data1
:
15880 case DW_FORM_data2
:
15881 case DW_FORM_data4
:
15882 case DW_FORM_data8
:
15883 case DW_FORM_udata
:
15884 case DW_FORM_sdata
:
15885 fprintf_unfiltered (f
, "constant: %s",
15886 pulongest (DW_UNSND (&die
->attrs
[i
])));
15888 case DW_FORM_sec_offset
:
15889 fprintf_unfiltered (f
, "section offset: %s",
15890 pulongest (DW_UNSND (&die
->attrs
[i
])));
15892 case DW_FORM_ref_sig8
:
15893 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
15894 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
15895 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
.sect_off
);
15897 fprintf_unfiltered (f
, "signatured type, offset: unknown");
15899 case DW_FORM_string
:
15901 case DW_FORM_GNU_str_index
:
15902 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
15903 DW_STRING (&die
->attrs
[i
])
15904 ? DW_STRING (&die
->attrs
[i
]) : "",
15905 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
15908 if (DW_UNSND (&die
->attrs
[i
]))
15909 fprintf_unfiltered (f
, "flag: TRUE");
15911 fprintf_unfiltered (f
, "flag: FALSE");
15913 case DW_FORM_flag_present
:
15914 fprintf_unfiltered (f
, "flag: TRUE");
15916 case DW_FORM_indirect
:
15917 /* The reader will have reduced the indirect form to
15918 the "base form" so this form should not occur. */
15919 fprintf_unfiltered (f
,
15920 "unexpected attribute form: DW_FORM_indirect");
15923 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
15924 die
->attrs
[i
].form
);
15927 fprintf_unfiltered (f
, "\n");
15932 dump_die_for_error (struct die_info
*die
)
15934 dump_die_shallow (gdb_stderr
, 0, die
);
15938 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
15940 int indent
= level
* 4;
15942 gdb_assert (die
!= NULL
);
15944 if (level
>= max_level
)
15947 dump_die_shallow (f
, indent
, die
);
15949 if (die
->child
!= NULL
)
15951 print_spaces (indent
, f
);
15952 fprintf_unfiltered (f
, " Children:");
15953 if (level
+ 1 < max_level
)
15955 fprintf_unfiltered (f
, "\n");
15956 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
15960 fprintf_unfiltered (f
,
15961 " [not printed, max nesting level reached]\n");
15965 if (die
->sibling
!= NULL
&& level
> 0)
15967 dump_die_1 (f
, level
, max_level
, die
->sibling
);
15971 /* This is called from the pdie macro in gdbinit.in.
15972 It's not static so gcc will keep a copy callable from gdb. */
15975 dump_die (struct die_info
*die
, int max_level
)
15977 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
15981 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
15985 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
15991 /* DW_ADDR is always stored already as sect_offset; despite for the forms
15992 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
15995 is_ref_attr (struct attribute
*attr
)
15997 switch (attr
->form
)
15999 case DW_FORM_ref_addr
:
16004 case DW_FORM_ref_udata
:
16011 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
16015 dwarf2_get_ref_die_offset (struct attribute
*attr
)
16017 sect_offset retval
= { DW_UNSND (attr
) };
16019 if (is_ref_attr (attr
))
16022 retval
.sect_off
= 0;
16023 complaint (&symfile_complaints
,
16024 _("unsupported die ref attribute form: '%s'"),
16025 dwarf_form_name (attr
->form
));
16029 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
16030 * the value held by the attribute is not constant. */
16033 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
16035 if (attr
->form
== DW_FORM_sdata
)
16036 return DW_SND (attr
);
16037 else if (attr
->form
== DW_FORM_udata
16038 || attr
->form
== DW_FORM_data1
16039 || attr
->form
== DW_FORM_data2
16040 || attr
->form
== DW_FORM_data4
16041 || attr
->form
== DW_FORM_data8
)
16042 return DW_UNSND (attr
);
16045 complaint (&symfile_complaints
,
16046 _("Attribute value is not a constant (%s)"),
16047 dwarf_form_name (attr
->form
));
16048 return default_value
;
16052 /* Follow reference or signature attribute ATTR of SRC_DIE.
16053 On entry *REF_CU is the CU of SRC_DIE.
16054 On exit *REF_CU is the CU of the result. */
16056 static struct die_info
*
16057 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
16058 struct dwarf2_cu
**ref_cu
)
16060 struct die_info
*die
;
16062 if (is_ref_attr (attr
))
16063 die
= follow_die_ref (src_die
, attr
, ref_cu
);
16064 else if (attr
->form
== DW_FORM_ref_sig8
)
16065 die
= follow_die_sig (src_die
, attr
, ref_cu
);
16068 dump_die_for_error (src_die
);
16069 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
16070 (*ref_cu
)->objfile
->name
);
16076 /* Follow reference OFFSET.
16077 On entry *REF_CU is the CU of the source die referencing OFFSET.
16078 On exit *REF_CU is the CU of the result.
16079 Returns NULL if OFFSET is invalid. */
16081 static struct die_info
*
16082 follow_die_offset (sect_offset offset
, struct dwarf2_cu
**ref_cu
)
16084 struct die_info temp_die
;
16085 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
16087 gdb_assert (cu
->per_cu
!= NULL
);
16091 if (cu
->per_cu
->is_debug_types
)
16093 /* .debug_types CUs cannot reference anything outside their CU.
16094 If they need to, they have to reference a signatured type via
16095 DW_FORM_ref_sig8. */
16096 if (! offset_in_cu_p (&cu
->header
, offset
))
16099 else if (! offset_in_cu_p (&cu
->header
, offset
))
16101 struct dwarf2_per_cu_data
*per_cu
;
16103 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
16105 /* If necessary, add it to the queue and load its DIEs. */
16106 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
16107 load_full_comp_unit (per_cu
, cu
->language
);
16109 target_cu
= per_cu
->cu
;
16111 else if (cu
->dies
== NULL
)
16113 /* We're loading full DIEs during partial symbol reading. */
16114 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
16115 load_full_comp_unit (cu
->per_cu
, language_minimal
);
16118 *ref_cu
= target_cu
;
16119 temp_die
.offset
= offset
;
16120 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
16123 /* Follow reference attribute ATTR of SRC_DIE.
16124 On entry *REF_CU is the CU of SRC_DIE.
16125 On exit *REF_CU is the CU of the result. */
16127 static struct die_info
*
16128 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
16129 struct dwarf2_cu
**ref_cu
)
16131 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16132 struct dwarf2_cu
*cu
= *ref_cu
;
16133 struct die_info
*die
;
16135 die
= follow_die_offset (offset
, ref_cu
);
16137 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
16138 "at 0x%x [in module %s]"),
16139 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
16144 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
16145 Returned value is intended for DW_OP_call*. Returned
16146 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
16148 struct dwarf2_locexpr_baton
16149 dwarf2_fetch_die_location_block (cu_offset offset_in_cu
,
16150 struct dwarf2_per_cu_data
*per_cu
,
16151 CORE_ADDR (*get_frame_pc
) (void *baton
),
16154 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
16155 struct dwarf2_cu
*cu
;
16156 struct die_info
*die
;
16157 struct attribute
*attr
;
16158 struct dwarf2_locexpr_baton retval
;
16160 dw2_setup (per_cu
->objfile
);
16162 if (per_cu
->cu
== NULL
)
16166 die
= follow_die_offset (offset
, &cu
);
16168 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
16169 offset
.sect_off
, per_cu
->objfile
->name
);
16171 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16174 /* DWARF: "If there is no such attribute, then there is no effect.".
16175 DATA is ignored if SIZE is 0. */
16177 retval
.data
= NULL
;
16180 else if (attr_form_is_section_offset (attr
))
16182 struct dwarf2_loclist_baton loclist_baton
;
16183 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
16186 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
16188 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
16190 retval
.size
= size
;
16194 if (!attr_form_is_block (attr
))
16195 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
16196 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
16197 offset
.sect_off
, per_cu
->objfile
->name
);
16199 retval
.data
= DW_BLOCK (attr
)->data
;
16200 retval
.size
= DW_BLOCK (attr
)->size
;
16202 retval
.per_cu
= cu
->per_cu
;
16204 age_cached_comp_units ();
16209 /* Return the type of the DIE at DIE_OFFSET in the CU named by
16213 dwarf2_get_die_type (cu_offset die_offset
,
16214 struct dwarf2_per_cu_data
*per_cu
)
16216 sect_offset die_offset_sect
;
16218 dw2_setup (per_cu
->objfile
);
16220 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
16221 return get_die_type_at_offset (die_offset_sect
, per_cu
);
16224 /* Follow the signature attribute ATTR in SRC_DIE.
16225 On entry *REF_CU is the CU of SRC_DIE.
16226 On exit *REF_CU is the CU of the result. */
16228 static struct die_info
*
16229 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
16230 struct dwarf2_cu
**ref_cu
)
16232 struct objfile
*objfile
= (*ref_cu
)->objfile
;
16233 struct die_info temp_die
;
16234 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
16235 struct dwarf2_cu
*sig_cu
;
16236 struct die_info
*die
;
16238 /* sig_type will be NULL if the signatured type is missing from
16240 if (sig_type
== NULL
)
16241 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
16242 "at 0x%x [in module %s]"),
16243 src_die
->offset
.sect_off
, objfile
->name
);
16245 /* If necessary, add it to the queue and load its DIEs. */
16247 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
16248 read_signatured_type (sig_type
);
16250 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
16252 sig_cu
= sig_type
->per_cu
.cu
;
16253 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
16254 temp_die
.offset
= sig_type
->type_offset_in_section
;
16255 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
16256 temp_die
.offset
.sect_off
);
16263 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
16264 "from DIE at 0x%x [in module %s]"),
16265 temp_die
.offset
.sect_off
, src_die
->offset
.sect_off
, objfile
->name
);
16268 /* Given an offset of a signatured type, return its signatured_type. */
16270 static struct signatured_type
*
16271 lookup_signatured_type_at_offset (struct objfile
*objfile
,
16272 struct dwarf2_section_info
*section
,
16273 sect_offset offset
)
16275 gdb_byte
*info_ptr
= section
->buffer
+ offset
.sect_off
;
16276 unsigned int length
, initial_length_size
;
16277 unsigned int sig_offset
;
16278 struct signatured_type find_entry
, *sig_type
;
16280 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
16281 sig_offset
= (initial_length_size
16283 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
16284 + 1 /*address_size*/);
16285 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
16286 sig_type
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
16288 /* This is only used to lookup previously recorded types.
16289 If we didn't find it, it's our bug. */
16290 gdb_assert (sig_type
!= NULL
);
16291 gdb_assert (offset
.sect_off
== sig_type
->per_cu
.offset
.sect_off
);
16296 /* Load the DIEs associated with type unit PER_CU into memory. */
16299 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
16301 struct signatured_type
*sig_type
;
16303 /* Caller is responsible for ensuring type_unit_groups don't get here. */
16304 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
16306 /* We have the per_cu, but we need the signatured_type.
16307 Fortunately this is an easy translation. */
16308 gdb_assert (per_cu
->is_debug_types
);
16309 sig_type
= (struct signatured_type
*) per_cu
;
16311 gdb_assert (per_cu
->cu
== NULL
);
16313 read_signatured_type (sig_type
);
16315 gdb_assert (per_cu
->cu
!= NULL
);
16318 /* die_reader_func for read_signatured_type.
16319 This is identical to load_full_comp_unit_reader,
16320 but is kept separate for now. */
16323 read_signatured_type_reader (const struct die_reader_specs
*reader
,
16324 gdb_byte
*info_ptr
,
16325 struct die_info
*comp_unit_die
,
16329 struct dwarf2_cu
*cu
= reader
->cu
;
16331 gdb_assert (cu
->die_hash
== NULL
);
16333 htab_create_alloc_ex (cu
->header
.length
/ 12,
16337 &cu
->comp_unit_obstack
,
16338 hashtab_obstack_allocate
,
16339 dummy_obstack_deallocate
);
16342 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
16343 &info_ptr
, comp_unit_die
);
16344 cu
->dies
= comp_unit_die
;
16345 /* comp_unit_die is not stored in die_hash, no need. */
16347 /* We try not to read any attributes in this function, because not
16348 all CUs needed for references have been loaded yet, and symbol
16349 table processing isn't initialized. But we have to set the CU language,
16350 or we won't be able to build types correctly.
16351 Similarly, if we do not read the producer, we can not apply
16352 producer-specific interpretation. */
16353 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
16356 /* Read in a signatured type and build its CU and DIEs.
16357 If the type is a stub for the real type in a DWO file,
16358 read in the real type from the DWO file as well. */
16361 read_signatured_type (struct signatured_type
*sig_type
)
16363 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
16365 gdb_assert (per_cu
->is_debug_types
);
16366 gdb_assert (per_cu
->cu
== NULL
);
16368 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
16369 read_signatured_type_reader
, NULL
);
16372 /* Decode simple location descriptions.
16373 Given a pointer to a dwarf block that defines a location, compute
16374 the location and return the value.
16376 NOTE drow/2003-11-18: This function is called in two situations
16377 now: for the address of static or global variables (partial symbols
16378 only) and for offsets into structures which are expected to be
16379 (more or less) constant. The partial symbol case should go away,
16380 and only the constant case should remain. That will let this
16381 function complain more accurately. A few special modes are allowed
16382 without complaint for global variables (for instance, global
16383 register values and thread-local values).
16385 A location description containing no operations indicates that the
16386 object is optimized out. The return value is 0 for that case.
16387 FIXME drow/2003-11-16: No callers check for this case any more; soon all
16388 callers will only want a very basic result and this can become a
16391 Note that stack[0] is unused except as a default error return. */
16394 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
16396 struct objfile
*objfile
= cu
->objfile
;
16398 int size
= blk
->size
;
16399 gdb_byte
*data
= blk
->data
;
16400 CORE_ADDR stack
[64];
16402 unsigned int bytes_read
, unsnd
;
16408 stack
[++stacki
] = 0;
16447 stack
[++stacki
] = op
- DW_OP_lit0
;
16482 stack
[++stacki
] = op
- DW_OP_reg0
;
16484 dwarf2_complex_location_expr_complaint ();
16488 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
16490 stack
[++stacki
] = unsnd
;
16492 dwarf2_complex_location_expr_complaint ();
16496 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
16501 case DW_OP_const1u
:
16502 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
16506 case DW_OP_const1s
:
16507 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
16511 case DW_OP_const2u
:
16512 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
16516 case DW_OP_const2s
:
16517 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
16521 case DW_OP_const4u
:
16522 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
16526 case DW_OP_const4s
:
16527 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
16531 case DW_OP_const8u
:
16532 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
16537 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
16543 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
16548 stack
[stacki
+ 1] = stack
[stacki
];
16553 stack
[stacki
- 1] += stack
[stacki
];
16557 case DW_OP_plus_uconst
:
16558 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
16564 stack
[stacki
- 1] -= stack
[stacki
];
16569 /* If we're not the last op, then we definitely can't encode
16570 this using GDB's address_class enum. This is valid for partial
16571 global symbols, although the variable's address will be bogus
16574 dwarf2_complex_location_expr_complaint ();
16577 case DW_OP_GNU_push_tls_address
:
16578 /* The top of the stack has the offset from the beginning
16579 of the thread control block at which the variable is located. */
16580 /* Nothing should follow this operator, so the top of stack would
16582 /* This is valid for partial global symbols, but the variable's
16583 address will be bogus in the psymtab. Make it always at least
16584 non-zero to not look as a variable garbage collected by linker
16585 which have DW_OP_addr 0. */
16587 dwarf2_complex_location_expr_complaint ();
16591 case DW_OP_GNU_uninit
:
16594 case DW_OP_GNU_addr_index
:
16595 case DW_OP_GNU_const_index
:
16596 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
16603 const char *name
= get_DW_OP_name (op
);
16606 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
16609 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
16613 return (stack
[stacki
]);
16616 /* Enforce maximum stack depth of SIZE-1 to avoid writing
16617 outside of the allocated space. Also enforce minimum>0. */
16618 if (stacki
>= ARRAY_SIZE (stack
) - 1)
16620 complaint (&symfile_complaints
,
16621 _("location description stack overflow"));
16627 complaint (&symfile_complaints
,
16628 _("location description stack underflow"));
16632 return (stack
[stacki
]);
16635 /* memory allocation interface */
16637 static struct dwarf_block
*
16638 dwarf_alloc_block (struct dwarf2_cu
*cu
)
16640 struct dwarf_block
*blk
;
16642 blk
= (struct dwarf_block
*)
16643 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
16647 static struct die_info
*
16648 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
16650 struct die_info
*die
;
16651 size_t size
= sizeof (struct die_info
);
16654 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
16656 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
16657 memset (die
, 0, sizeof (struct die_info
));
16662 /* Macro support. */
16664 /* Return the full name of file number I in *LH's file name table.
16665 Use COMP_DIR as the name of the current directory of the
16666 compilation. The result is allocated using xmalloc; the caller is
16667 responsible for freeing it. */
16669 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
16671 /* Is the file number a valid index into the line header's file name
16672 table? Remember that file numbers start with one, not zero. */
16673 if (1 <= file
&& file
<= lh
->num_file_names
)
16675 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
16677 if (IS_ABSOLUTE_PATH (fe
->name
))
16678 return xstrdup (fe
->name
);
16686 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
16692 dir_len
= strlen (dir
);
16693 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
16694 strcpy (full_name
, dir
);
16695 full_name
[dir_len
] = '/';
16696 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
16700 return xstrdup (fe
->name
);
16705 /* The compiler produced a bogus file number. We can at least
16706 record the macro definitions made in the file, even if we
16707 won't be able to find the file by name. */
16708 char fake_name
[80];
16710 sprintf (fake_name
, "<bad macro file number %d>", file
);
16712 complaint (&symfile_complaints
,
16713 _("bad file number in macro information (%d)"),
16716 return xstrdup (fake_name
);
16721 static struct macro_source_file
*
16722 macro_start_file (int file
, int line
,
16723 struct macro_source_file
*current_file
,
16724 const char *comp_dir
,
16725 struct line_header
*lh
, struct objfile
*objfile
)
16727 /* The full name of this source file. */
16728 char *full_name
= file_full_name (file
, lh
, comp_dir
);
16730 /* We don't create a macro table for this compilation unit
16731 at all until we actually get a filename. */
16732 if (! pending_macros
)
16733 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
16734 objfile
->macro_cache
);
16736 if (! current_file
)
16738 /* If we have no current file, then this must be the start_file
16739 directive for the compilation unit's main source file. */
16740 current_file
= macro_set_main (pending_macros
, full_name
);
16741 macro_define_special (pending_macros
);
16744 current_file
= macro_include (current_file
, line
, full_name
);
16748 return current_file
;
16752 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
16753 followed by a null byte. */
16755 copy_string (const char *buf
, int len
)
16757 char *s
= xmalloc (len
+ 1);
16759 memcpy (s
, buf
, len
);
16765 static const char *
16766 consume_improper_spaces (const char *p
, const char *body
)
16770 complaint (&symfile_complaints
,
16771 _("macro definition contains spaces "
16772 "in formal argument list:\n`%s'"),
16784 parse_macro_definition (struct macro_source_file
*file
, int line
,
16789 /* The body string takes one of two forms. For object-like macro
16790 definitions, it should be:
16792 <macro name> " " <definition>
16794 For function-like macro definitions, it should be:
16796 <macro name> "() " <definition>
16798 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
16800 Spaces may appear only where explicitly indicated, and in the
16803 The Dwarf 2 spec says that an object-like macro's name is always
16804 followed by a space, but versions of GCC around March 2002 omit
16805 the space when the macro's definition is the empty string.
16807 The Dwarf 2 spec says that there should be no spaces between the
16808 formal arguments in a function-like macro's formal argument list,
16809 but versions of GCC around March 2002 include spaces after the
16813 /* Find the extent of the macro name. The macro name is terminated
16814 by either a space or null character (for an object-like macro) or
16815 an opening paren (for a function-like macro). */
16816 for (p
= body
; *p
; p
++)
16817 if (*p
== ' ' || *p
== '(')
16820 if (*p
== ' ' || *p
== '\0')
16822 /* It's an object-like macro. */
16823 int name_len
= p
- body
;
16824 char *name
= copy_string (body
, name_len
);
16825 const char *replacement
;
16828 replacement
= body
+ name_len
+ 1;
16831 dwarf2_macro_malformed_definition_complaint (body
);
16832 replacement
= body
+ name_len
;
16835 macro_define_object (file
, line
, name
, replacement
);
16839 else if (*p
== '(')
16841 /* It's a function-like macro. */
16842 char *name
= copy_string (body
, p
- body
);
16845 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
16849 p
= consume_improper_spaces (p
, body
);
16851 /* Parse the formal argument list. */
16852 while (*p
&& *p
!= ')')
16854 /* Find the extent of the current argument name. */
16855 const char *arg_start
= p
;
16857 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
16860 if (! *p
|| p
== arg_start
)
16861 dwarf2_macro_malformed_definition_complaint (body
);
16864 /* Make sure argv has room for the new argument. */
16865 if (argc
>= argv_size
)
16868 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
16871 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
16874 p
= consume_improper_spaces (p
, body
);
16876 /* Consume the comma, if present. */
16881 p
= consume_improper_spaces (p
, body
);
16890 /* Perfectly formed definition, no complaints. */
16891 macro_define_function (file
, line
, name
,
16892 argc
, (const char **) argv
,
16894 else if (*p
== '\0')
16896 /* Complain, but do define it. */
16897 dwarf2_macro_malformed_definition_complaint (body
);
16898 macro_define_function (file
, line
, name
,
16899 argc
, (const char **) argv
,
16903 /* Just complain. */
16904 dwarf2_macro_malformed_definition_complaint (body
);
16907 /* Just complain. */
16908 dwarf2_macro_malformed_definition_complaint (body
);
16914 for (i
= 0; i
< argc
; i
++)
16920 dwarf2_macro_malformed_definition_complaint (body
);
16923 /* Skip some bytes from BYTES according to the form given in FORM.
16924 Returns the new pointer. */
16927 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
, gdb_byte
*buffer_end
,
16928 enum dwarf_form form
,
16929 unsigned int offset_size
,
16930 struct dwarf2_section_info
*section
)
16932 unsigned int bytes_read
;
16936 case DW_FORM_data1
:
16941 case DW_FORM_data2
:
16945 case DW_FORM_data4
:
16949 case DW_FORM_data8
:
16953 case DW_FORM_string
:
16954 read_direct_string (abfd
, bytes
, &bytes_read
);
16955 bytes
+= bytes_read
;
16958 case DW_FORM_sec_offset
:
16960 bytes
+= offset_size
;
16963 case DW_FORM_block
:
16964 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
16965 bytes
+= bytes_read
;
16968 case DW_FORM_block1
:
16969 bytes
+= 1 + read_1_byte (abfd
, bytes
);
16971 case DW_FORM_block2
:
16972 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
16974 case DW_FORM_block4
:
16975 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
16978 case DW_FORM_sdata
:
16979 case DW_FORM_udata
:
16980 case DW_FORM_GNU_addr_index
:
16981 case DW_FORM_GNU_str_index
:
16982 bytes
= (gdb_byte
*) gdb_skip_leb128 (bytes
, buffer_end
);
16985 dwarf2_section_buffer_overflow_complaint (section
);
16993 complaint (&symfile_complaints
,
16994 _("invalid form 0x%x in `%s'"),
16996 section
->asection
->name
);
17004 /* A helper for dwarf_decode_macros that handles skipping an unknown
17005 opcode. Returns an updated pointer to the macro data buffer; or,
17006 on error, issues a complaint and returns NULL. */
17009 skip_unknown_opcode (unsigned int opcode
,
17010 gdb_byte
**opcode_definitions
,
17011 gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
17013 unsigned int offset_size
,
17014 struct dwarf2_section_info
*section
)
17016 unsigned int bytes_read
, i
;
17020 if (opcode_definitions
[opcode
] == NULL
)
17022 complaint (&symfile_complaints
,
17023 _("unrecognized DW_MACFINO opcode 0x%x"),
17028 defn
= opcode_definitions
[opcode
];
17029 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
17030 defn
+= bytes_read
;
17032 for (i
= 0; i
< arg
; ++i
)
17034 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
17036 if (mac_ptr
== NULL
)
17038 /* skip_form_bytes already issued the complaint. */
17046 /* A helper function which parses the header of a macro section.
17047 If the macro section is the extended (for now called "GNU") type,
17048 then this updates *OFFSET_SIZE. Returns a pointer to just after
17049 the header, or issues a complaint and returns NULL on error. */
17052 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
17055 unsigned int *offset_size
,
17056 int section_is_gnu
)
17058 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
17060 if (section_is_gnu
)
17062 unsigned int version
, flags
;
17064 version
= read_2_bytes (abfd
, mac_ptr
);
17067 complaint (&symfile_complaints
,
17068 _("unrecognized version `%d' in .debug_macro section"),
17074 flags
= read_1_byte (abfd
, mac_ptr
);
17076 *offset_size
= (flags
& 1) ? 8 : 4;
17078 if ((flags
& 2) != 0)
17079 /* We don't need the line table offset. */
17080 mac_ptr
+= *offset_size
;
17082 /* Vendor opcode descriptions. */
17083 if ((flags
& 4) != 0)
17085 unsigned int i
, count
;
17087 count
= read_1_byte (abfd
, mac_ptr
);
17089 for (i
= 0; i
< count
; ++i
)
17091 unsigned int opcode
, bytes_read
;
17094 opcode
= read_1_byte (abfd
, mac_ptr
);
17096 opcode_definitions
[opcode
] = mac_ptr
;
17097 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17098 mac_ptr
+= bytes_read
;
17107 /* A helper for dwarf_decode_macros that handles the GNU extensions,
17108 including DW_MACRO_GNU_transparent_include. */
17111 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
17112 struct macro_source_file
*current_file
,
17113 struct line_header
*lh
, char *comp_dir
,
17114 struct dwarf2_section_info
*section
,
17115 int section_is_gnu
,
17116 unsigned int offset_size
,
17117 struct objfile
*objfile
,
17118 htab_t include_hash
)
17120 enum dwarf_macro_record_type macinfo_type
;
17121 int at_commandline
;
17122 gdb_byte
*opcode_definitions
[256];
17124 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
17125 &offset_size
, section_is_gnu
);
17126 if (mac_ptr
== NULL
)
17128 /* We already issued a complaint. */
17132 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
17133 GDB is still reading the definitions from command line. First
17134 DW_MACINFO_start_file will need to be ignored as it was already executed
17135 to create CURRENT_FILE for the main source holding also the command line
17136 definitions. On first met DW_MACINFO_start_file this flag is reset to
17137 normally execute all the remaining DW_MACINFO_start_file macinfos. */
17139 at_commandline
= 1;
17143 /* Do we at least have room for a macinfo type byte? */
17144 if (mac_ptr
>= mac_end
)
17146 dwarf2_section_buffer_overflow_complaint (section
);
17150 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
17153 /* Note that we rely on the fact that the corresponding GNU and
17154 DWARF constants are the same. */
17155 switch (macinfo_type
)
17157 /* A zero macinfo type indicates the end of the macro
17162 case DW_MACRO_GNU_define
:
17163 case DW_MACRO_GNU_undef
:
17164 case DW_MACRO_GNU_define_indirect
:
17165 case DW_MACRO_GNU_undef_indirect
:
17167 unsigned int bytes_read
;
17172 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17173 mac_ptr
+= bytes_read
;
17175 if (macinfo_type
== DW_MACRO_GNU_define
17176 || macinfo_type
== DW_MACRO_GNU_undef
)
17178 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
17179 mac_ptr
+= bytes_read
;
17183 LONGEST str_offset
;
17185 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
17186 mac_ptr
+= offset_size
;
17188 body
= read_indirect_string_at_offset (abfd
, str_offset
);
17191 is_define
= (macinfo_type
== DW_MACRO_GNU_define
17192 || macinfo_type
== DW_MACRO_GNU_define_indirect
);
17193 if (! current_file
)
17195 /* DWARF violation as no main source is present. */
17196 complaint (&symfile_complaints
,
17197 _("debug info with no main source gives macro %s "
17199 is_define
? _("definition") : _("undefinition"),
17203 if ((line
== 0 && !at_commandline
)
17204 || (line
!= 0 && at_commandline
))
17205 complaint (&symfile_complaints
,
17206 _("debug info gives %s macro %s with %s line %d: %s"),
17207 at_commandline
? _("command-line") : _("in-file"),
17208 is_define
? _("definition") : _("undefinition"),
17209 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
17212 parse_macro_definition (current_file
, line
, body
);
17215 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
17216 || macinfo_type
== DW_MACRO_GNU_undef_indirect
);
17217 macro_undef (current_file
, line
, body
);
17222 case DW_MACRO_GNU_start_file
:
17224 unsigned int bytes_read
;
17227 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17228 mac_ptr
+= bytes_read
;
17229 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17230 mac_ptr
+= bytes_read
;
17232 if ((line
== 0 && !at_commandline
)
17233 || (line
!= 0 && at_commandline
))
17234 complaint (&symfile_complaints
,
17235 _("debug info gives source %d included "
17236 "from %s at %s line %d"),
17237 file
, at_commandline
? _("command-line") : _("file"),
17238 line
== 0 ? _("zero") : _("non-zero"), line
);
17240 if (at_commandline
)
17242 /* This DW_MACRO_GNU_start_file was executed in the
17244 at_commandline
= 0;
17247 current_file
= macro_start_file (file
, line
,
17248 current_file
, comp_dir
,
17253 case DW_MACRO_GNU_end_file
:
17254 if (! current_file
)
17255 complaint (&symfile_complaints
,
17256 _("macro debug info has an unmatched "
17257 "`close_file' directive"));
17260 current_file
= current_file
->included_by
;
17261 if (! current_file
)
17263 enum dwarf_macro_record_type next_type
;
17265 /* GCC circa March 2002 doesn't produce the zero
17266 type byte marking the end of the compilation
17267 unit. Complain if it's not there, but exit no
17270 /* Do we at least have room for a macinfo type byte? */
17271 if (mac_ptr
>= mac_end
)
17273 dwarf2_section_buffer_overflow_complaint (section
);
17277 /* We don't increment mac_ptr here, so this is just
17279 next_type
= read_1_byte (abfd
, mac_ptr
);
17280 if (next_type
!= 0)
17281 complaint (&symfile_complaints
,
17282 _("no terminating 0-type entry for "
17283 "macros in `.debug_macinfo' section"));
17290 case DW_MACRO_GNU_transparent_include
:
17295 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
17296 mac_ptr
+= offset_size
;
17298 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
17301 /* This has actually happened; see
17302 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
17303 complaint (&symfile_complaints
,
17304 _("recursive DW_MACRO_GNU_transparent_include in "
17305 ".debug_macro section"));
17311 dwarf_decode_macro_bytes (abfd
,
17312 section
->buffer
+ offset
,
17313 mac_end
, current_file
,
17315 section
, section_is_gnu
,
17316 offset_size
, objfile
, include_hash
);
17318 htab_remove_elt (include_hash
, mac_ptr
);
17323 case DW_MACINFO_vendor_ext
:
17324 if (!section_is_gnu
)
17326 unsigned int bytes_read
;
17329 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17330 mac_ptr
+= bytes_read
;
17331 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
17332 mac_ptr
+= bytes_read
;
17334 /* We don't recognize any vendor extensions. */
17340 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
17341 mac_ptr
, mac_end
, abfd
, offset_size
,
17343 if (mac_ptr
== NULL
)
17347 } while (macinfo_type
!= 0);
17351 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
17352 char *comp_dir
, int section_is_gnu
)
17354 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17355 struct line_header
*lh
= cu
->line_header
;
17357 gdb_byte
*mac_ptr
, *mac_end
;
17358 struct macro_source_file
*current_file
= 0;
17359 enum dwarf_macro_record_type macinfo_type
;
17360 unsigned int offset_size
= cu
->header
.offset_size
;
17361 gdb_byte
*opcode_definitions
[256];
17362 struct cleanup
*cleanup
;
17363 htab_t include_hash
;
17365 struct dwarf2_section_info
*section
;
17366 const char *section_name
;
17368 if (cu
->dwo_unit
!= NULL
)
17370 if (section_is_gnu
)
17372 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
17373 section_name
= ".debug_macro.dwo";
17377 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
17378 section_name
= ".debug_macinfo.dwo";
17383 if (section_is_gnu
)
17385 section
= &dwarf2_per_objfile
->macro
;
17386 section_name
= ".debug_macro";
17390 section
= &dwarf2_per_objfile
->macinfo
;
17391 section_name
= ".debug_macinfo";
17395 dwarf2_read_section (objfile
, section
);
17396 if (section
->buffer
== NULL
)
17398 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
17401 abfd
= section
->asection
->owner
;
17403 /* First pass: Find the name of the base filename.
17404 This filename is needed in order to process all macros whose definition
17405 (or undefinition) comes from the command line. These macros are defined
17406 before the first DW_MACINFO_start_file entry, and yet still need to be
17407 associated to the base file.
17409 To determine the base file name, we scan the macro definitions until we
17410 reach the first DW_MACINFO_start_file entry. We then initialize
17411 CURRENT_FILE accordingly so that any macro definition found before the
17412 first DW_MACINFO_start_file can still be associated to the base file. */
17414 mac_ptr
= section
->buffer
+ offset
;
17415 mac_end
= section
->buffer
+ section
->size
;
17417 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
17418 &offset_size
, section_is_gnu
);
17419 if (mac_ptr
== NULL
)
17421 /* We already issued a complaint. */
17427 /* Do we at least have room for a macinfo type byte? */
17428 if (mac_ptr
>= mac_end
)
17430 /* Complaint is printed during the second pass as GDB will probably
17431 stop the first pass earlier upon finding
17432 DW_MACINFO_start_file. */
17436 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
17439 /* Note that we rely on the fact that the corresponding GNU and
17440 DWARF constants are the same. */
17441 switch (macinfo_type
)
17443 /* A zero macinfo type indicates the end of the macro
17448 case DW_MACRO_GNU_define
:
17449 case DW_MACRO_GNU_undef
:
17450 /* Only skip the data by MAC_PTR. */
17452 unsigned int bytes_read
;
17454 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17455 mac_ptr
+= bytes_read
;
17456 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
17457 mac_ptr
+= bytes_read
;
17461 case DW_MACRO_GNU_start_file
:
17463 unsigned int bytes_read
;
17466 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17467 mac_ptr
+= bytes_read
;
17468 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17469 mac_ptr
+= bytes_read
;
17471 current_file
= macro_start_file (file
, line
, current_file
,
17472 comp_dir
, lh
, objfile
);
17476 case DW_MACRO_GNU_end_file
:
17477 /* No data to skip by MAC_PTR. */
17480 case DW_MACRO_GNU_define_indirect
:
17481 case DW_MACRO_GNU_undef_indirect
:
17483 unsigned int bytes_read
;
17485 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17486 mac_ptr
+= bytes_read
;
17487 mac_ptr
+= offset_size
;
17491 case DW_MACRO_GNU_transparent_include
:
17492 /* Note that, according to the spec, a transparent include
17493 chain cannot call DW_MACRO_GNU_start_file. So, we can just
17494 skip this opcode. */
17495 mac_ptr
+= offset_size
;
17498 case DW_MACINFO_vendor_ext
:
17499 /* Only skip the data by MAC_PTR. */
17500 if (!section_is_gnu
)
17502 unsigned int bytes_read
;
17504 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17505 mac_ptr
+= bytes_read
;
17506 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
17507 mac_ptr
+= bytes_read
;
17512 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
17513 mac_ptr
, mac_end
, abfd
, offset_size
,
17515 if (mac_ptr
== NULL
)
17519 } while (macinfo_type
!= 0 && current_file
== NULL
);
17521 /* Second pass: Process all entries.
17523 Use the AT_COMMAND_LINE flag to determine whether we are still processing
17524 command-line macro definitions/undefinitions. This flag is unset when we
17525 reach the first DW_MACINFO_start_file entry. */
17527 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
17528 NULL
, xcalloc
, xfree
);
17529 cleanup
= make_cleanup_htab_delete (include_hash
);
17530 mac_ptr
= section
->buffer
+ offset
;
17531 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
17533 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
17534 current_file
, lh
, comp_dir
, section
, section_is_gnu
,
17535 offset_size
, objfile
, include_hash
);
17536 do_cleanups (cleanup
);
17539 /* Check if the attribute's form is a DW_FORM_block*
17540 if so return true else false. */
17543 attr_form_is_block (struct attribute
*attr
)
17545 return (attr
== NULL
? 0 :
17546 attr
->form
== DW_FORM_block1
17547 || attr
->form
== DW_FORM_block2
17548 || attr
->form
== DW_FORM_block4
17549 || attr
->form
== DW_FORM_block
17550 || attr
->form
== DW_FORM_exprloc
);
17553 /* Return non-zero if ATTR's value is a section offset --- classes
17554 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
17555 You may use DW_UNSND (attr) to retrieve such offsets.
17557 Section 7.5.4, "Attribute Encodings", explains that no attribute
17558 may have a value that belongs to more than one of these classes; it
17559 would be ambiguous if we did, because we use the same forms for all
17563 attr_form_is_section_offset (struct attribute
*attr
)
17565 return (attr
->form
== DW_FORM_data4
17566 || attr
->form
== DW_FORM_data8
17567 || attr
->form
== DW_FORM_sec_offset
);
17570 /* Return non-zero if ATTR's value falls in the 'constant' class, or
17571 zero otherwise. When this function returns true, you can apply
17572 dwarf2_get_attr_constant_value to it.
17574 However, note that for some attributes you must check
17575 attr_form_is_section_offset before using this test. DW_FORM_data4
17576 and DW_FORM_data8 are members of both the constant class, and of
17577 the classes that contain offsets into other debug sections
17578 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
17579 that, if an attribute's can be either a constant or one of the
17580 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
17581 taken as section offsets, not constants. */
17584 attr_form_is_constant (struct attribute
*attr
)
17586 switch (attr
->form
)
17588 case DW_FORM_sdata
:
17589 case DW_FORM_udata
:
17590 case DW_FORM_data1
:
17591 case DW_FORM_data2
:
17592 case DW_FORM_data4
:
17593 case DW_FORM_data8
:
17600 /* Return the .debug_loc section to use for CU.
17601 For DWO files use .debug_loc.dwo. */
17603 static struct dwarf2_section_info
*
17604 cu_debug_loc_section (struct dwarf2_cu
*cu
)
17607 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
17608 return &dwarf2_per_objfile
->loc
;
17611 /* A helper function that fills in a dwarf2_loclist_baton. */
17614 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
17615 struct dwarf2_loclist_baton
*baton
,
17616 struct attribute
*attr
)
17618 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
17620 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17622 baton
->per_cu
= cu
->per_cu
;
17623 gdb_assert (baton
->per_cu
);
17624 /* We don't know how long the location list is, but make sure we
17625 don't run off the edge of the section. */
17626 baton
->size
= section
->size
- DW_UNSND (attr
);
17627 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
17628 baton
->base_address
= cu
->base_address
;
17629 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
17633 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
17634 struct dwarf2_cu
*cu
)
17636 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17637 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
17639 if (attr_form_is_section_offset (attr
)
17640 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
17641 the section. If so, fall through to the complaint in the
17643 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
17645 struct dwarf2_loclist_baton
*baton
;
17647 baton
= obstack_alloc (&objfile
->objfile_obstack
,
17648 sizeof (struct dwarf2_loclist_baton
));
17650 fill_in_loclist_baton (cu
, baton
, attr
);
17652 if (cu
->base_known
== 0)
17653 complaint (&symfile_complaints
,
17654 _("Location list used without "
17655 "specifying the CU base address."));
17657 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
17658 SYMBOL_LOCATION_BATON (sym
) = baton
;
17662 struct dwarf2_locexpr_baton
*baton
;
17664 baton
= obstack_alloc (&objfile
->objfile_obstack
,
17665 sizeof (struct dwarf2_locexpr_baton
));
17666 baton
->per_cu
= cu
->per_cu
;
17667 gdb_assert (baton
->per_cu
);
17669 if (attr_form_is_block (attr
))
17671 /* Note that we're just copying the block's data pointer
17672 here, not the actual data. We're still pointing into the
17673 info_buffer for SYM's objfile; right now we never release
17674 that buffer, but when we do clean up properly this may
17676 baton
->size
= DW_BLOCK (attr
)->size
;
17677 baton
->data
= DW_BLOCK (attr
)->data
;
17681 dwarf2_invalid_attrib_class_complaint ("location description",
17682 SYMBOL_NATURAL_NAME (sym
));
17686 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
17687 SYMBOL_LOCATION_BATON (sym
) = baton
;
17691 /* Return the OBJFILE associated with the compilation unit CU. If CU
17692 came from a separate debuginfo file, then the master objfile is
17696 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
17698 struct objfile
*objfile
= per_cu
->objfile
;
17700 /* Return the master objfile, so that we can report and look up the
17701 correct file containing this variable. */
17702 if (objfile
->separate_debug_objfile_backlink
)
17703 objfile
= objfile
->separate_debug_objfile_backlink
;
17708 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
17709 (CU_HEADERP is unused in such case) or prepare a temporary copy at
17710 CU_HEADERP first. */
17712 static const struct comp_unit_head
*
17713 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
17714 struct dwarf2_per_cu_data
*per_cu
)
17716 gdb_byte
*info_ptr
;
17719 return &per_cu
->cu
->header
;
17721 info_ptr
= per_cu
->info_or_types_section
->buffer
+ per_cu
->offset
.sect_off
;
17723 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
17724 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
17729 /* Return the address size given in the compilation unit header for CU. */
17732 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
17734 struct comp_unit_head cu_header_local
;
17735 const struct comp_unit_head
*cu_headerp
;
17737 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
17739 return cu_headerp
->addr_size
;
17742 /* Return the offset size given in the compilation unit header for CU. */
17745 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
17747 struct comp_unit_head cu_header_local
;
17748 const struct comp_unit_head
*cu_headerp
;
17750 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
17752 return cu_headerp
->offset_size
;
17755 /* See its dwarf2loc.h declaration. */
17758 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
17760 struct comp_unit_head cu_header_local
;
17761 const struct comp_unit_head
*cu_headerp
;
17763 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
17765 if (cu_headerp
->version
== 2)
17766 return cu_headerp
->addr_size
;
17768 return cu_headerp
->offset_size
;
17771 /* Return the text offset of the CU. The returned offset comes from
17772 this CU's objfile. If this objfile came from a separate debuginfo
17773 file, then the offset may be different from the corresponding
17774 offset in the parent objfile. */
17777 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
17779 struct objfile
*objfile
= per_cu
->objfile
;
17781 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17784 /* Locate the .debug_info compilation unit from CU's objfile which contains
17785 the DIE at OFFSET. Raises an error on failure. */
17787 static struct dwarf2_per_cu_data
*
17788 dwarf2_find_containing_comp_unit (sect_offset offset
,
17789 struct objfile
*objfile
)
17791 struct dwarf2_per_cu_data
*this_cu
;
17795 high
= dwarf2_per_objfile
->n_comp_units
- 1;
17798 int mid
= low
+ (high
- low
) / 2;
17800 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
.sect_off
17801 >= offset
.sect_off
)
17806 gdb_assert (low
== high
);
17807 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
.sect_off
17811 error (_("Dwarf Error: could not find partial DIE containing "
17812 "offset 0x%lx [in module %s]"),
17813 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
17815 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
17816 <= offset
.sect_off
);
17817 return dwarf2_per_objfile
->all_comp_units
[low
-1];
17821 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
17822 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
17823 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
17824 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
17825 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
17830 /* Initialize dwarf2_cu CU, owned by PER_CU. */
17833 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
17835 memset (cu
, 0, sizeof (*cu
));
17837 cu
->per_cu
= per_cu
;
17838 cu
->objfile
= per_cu
->objfile
;
17839 obstack_init (&cu
->comp_unit_obstack
);
17842 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
17845 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
17846 enum language pretend_language
)
17848 struct attribute
*attr
;
17850 /* Set the language we're debugging. */
17851 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
17853 set_cu_language (DW_UNSND (attr
), cu
);
17856 cu
->language
= pretend_language
;
17857 cu
->language_defn
= language_def (cu
->language
);
17860 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
17862 cu
->producer
= DW_STRING (attr
);
17865 /* Release one cached compilation unit, CU. We unlink it from the tree
17866 of compilation units, but we don't remove it from the read_in_chain;
17867 the caller is responsible for that.
17868 NOTE: DATA is a void * because this function is also used as a
17869 cleanup routine. */
17872 free_heap_comp_unit (void *data
)
17874 struct dwarf2_cu
*cu
= data
;
17876 gdb_assert (cu
->per_cu
!= NULL
);
17877 cu
->per_cu
->cu
= NULL
;
17880 obstack_free (&cu
->comp_unit_obstack
, NULL
);
17885 /* This cleanup function is passed the address of a dwarf2_cu on the stack
17886 when we're finished with it. We can't free the pointer itself, but be
17887 sure to unlink it from the cache. Also release any associated storage. */
17890 free_stack_comp_unit (void *data
)
17892 struct dwarf2_cu
*cu
= data
;
17894 gdb_assert (cu
->per_cu
!= NULL
);
17895 cu
->per_cu
->cu
= NULL
;
17898 obstack_free (&cu
->comp_unit_obstack
, NULL
);
17899 cu
->partial_dies
= NULL
;
17902 /* Free all cached compilation units. */
17905 free_cached_comp_units (void *data
)
17907 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
17909 per_cu
= dwarf2_per_objfile
->read_in_chain
;
17910 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
17911 while (per_cu
!= NULL
)
17913 struct dwarf2_per_cu_data
*next_cu
;
17915 next_cu
= per_cu
->cu
->read_in_chain
;
17917 free_heap_comp_unit (per_cu
->cu
);
17918 *last_chain
= next_cu
;
17924 /* Increase the age counter on each cached compilation unit, and free
17925 any that are too old. */
17928 age_cached_comp_units (void)
17930 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
17932 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
17933 per_cu
= dwarf2_per_objfile
->read_in_chain
;
17934 while (per_cu
!= NULL
)
17936 per_cu
->cu
->last_used
++;
17937 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
17938 dwarf2_mark (per_cu
->cu
);
17939 per_cu
= per_cu
->cu
->read_in_chain
;
17942 per_cu
= dwarf2_per_objfile
->read_in_chain
;
17943 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
17944 while (per_cu
!= NULL
)
17946 struct dwarf2_per_cu_data
*next_cu
;
17948 next_cu
= per_cu
->cu
->read_in_chain
;
17950 if (!per_cu
->cu
->mark
)
17952 free_heap_comp_unit (per_cu
->cu
);
17953 *last_chain
= next_cu
;
17956 last_chain
= &per_cu
->cu
->read_in_chain
;
17962 /* Remove a single compilation unit from the cache. */
17965 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
17967 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
17969 per_cu
= dwarf2_per_objfile
->read_in_chain
;
17970 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
17971 while (per_cu
!= NULL
)
17973 struct dwarf2_per_cu_data
*next_cu
;
17975 next_cu
= per_cu
->cu
->read_in_chain
;
17977 if (per_cu
== target_per_cu
)
17979 free_heap_comp_unit (per_cu
->cu
);
17981 *last_chain
= next_cu
;
17985 last_chain
= &per_cu
->cu
->read_in_chain
;
17991 /* Release all extra memory associated with OBJFILE. */
17994 dwarf2_free_objfile (struct objfile
*objfile
)
17996 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
17998 if (dwarf2_per_objfile
== NULL
)
18001 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
18002 free_cached_comp_units (NULL
);
18004 if (dwarf2_per_objfile
->quick_file_names_table
)
18005 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
18007 /* Everything else should be on the objfile obstack. */
18010 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
18011 We store these in a hash table separate from the DIEs, and preserve them
18012 when the DIEs are flushed out of cache.
18014 The CU "per_cu" pointer is needed because offset alone is not enough to
18015 uniquely identify the type. A file may have multiple .debug_types sections,
18016 or the type may come from a DWO file. We have to use something in
18017 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
18018 routine, get_die_type_at_offset, from outside this file, and thus won't
18019 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
18022 struct dwarf2_per_cu_offset_and_type
18024 const struct dwarf2_per_cu_data
*per_cu
;
18025 sect_offset offset
;
18029 /* Hash function for a dwarf2_per_cu_offset_and_type. */
18032 per_cu_offset_and_type_hash (const void *item
)
18034 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
18036 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
18039 /* Equality function for a dwarf2_per_cu_offset_and_type. */
18042 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
18044 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
18045 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
18047 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
18048 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
18051 /* Set the type associated with DIE to TYPE. Save it in CU's hash
18052 table if necessary. For convenience, return TYPE.
18054 The DIEs reading must have careful ordering to:
18055 * Not cause infite loops trying to read in DIEs as a prerequisite for
18056 reading current DIE.
18057 * Not trying to dereference contents of still incompletely read in types
18058 while reading in other DIEs.
18059 * Enable referencing still incompletely read in types just by a pointer to
18060 the type without accessing its fields.
18062 Therefore caller should follow these rules:
18063 * Try to fetch any prerequisite types we may need to build this DIE type
18064 before building the type and calling set_die_type.
18065 * After building type call set_die_type for current DIE as soon as
18066 possible before fetching more types to complete the current type.
18067 * Make the type as complete as possible before fetching more types. */
18069 static struct type
*
18070 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18072 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
18073 struct objfile
*objfile
= cu
->objfile
;
18075 /* For Ada types, make sure that the gnat-specific data is always
18076 initialized (if not already set). There are a few types where
18077 we should not be doing so, because the type-specific area is
18078 already used to hold some other piece of info (eg: TYPE_CODE_FLT
18079 where the type-specific area is used to store the floatformat).
18080 But this is not a problem, because the gnat-specific information
18081 is actually not needed for these types. */
18082 if (need_gnat_info (cu
)
18083 && TYPE_CODE (type
) != TYPE_CODE_FUNC
18084 && TYPE_CODE (type
) != TYPE_CODE_FLT
18085 && !HAVE_GNAT_AUX_INFO (type
))
18086 INIT_GNAT_SPECIFIC (type
);
18088 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
18090 dwarf2_per_objfile
->die_type_hash
=
18091 htab_create_alloc_ex (127,
18092 per_cu_offset_and_type_hash
,
18093 per_cu_offset_and_type_eq
,
18095 &objfile
->objfile_obstack
,
18096 hashtab_obstack_allocate
,
18097 dummy_obstack_deallocate
);
18100 ofs
.per_cu
= cu
->per_cu
;
18101 ofs
.offset
= die
->offset
;
18103 slot
= (struct dwarf2_per_cu_offset_and_type
**)
18104 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
18106 complaint (&symfile_complaints
,
18107 _("A problem internal to GDB: DIE 0x%x has type already set"),
18108 die
->offset
.sect_off
);
18109 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
18114 /* Look up the type for the die at OFFSET in the appropriate type_hash
18115 table, or return NULL if the die does not have a saved type. */
18117 static struct type
*
18118 get_die_type_at_offset (sect_offset offset
,
18119 struct dwarf2_per_cu_data
*per_cu
)
18121 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
18123 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
18126 ofs
.per_cu
= per_cu
;
18127 ofs
.offset
= offset
;
18128 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
18135 /* Look up the type for DIE in the appropriate type_hash table,
18136 or return NULL if DIE does not have a saved type. */
18138 static struct type
*
18139 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18141 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
18144 /* Add a dependence relationship from CU to REF_PER_CU. */
18147 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
18148 struct dwarf2_per_cu_data
*ref_per_cu
)
18152 if (cu
->dependencies
== NULL
)
18154 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
18155 NULL
, &cu
->comp_unit_obstack
,
18156 hashtab_obstack_allocate
,
18157 dummy_obstack_deallocate
);
18159 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
18161 *slot
= ref_per_cu
;
18164 /* Subroutine of dwarf2_mark to pass to htab_traverse.
18165 Set the mark field in every compilation unit in the
18166 cache that we must keep because we are keeping CU. */
18169 dwarf2_mark_helper (void **slot
, void *data
)
18171 struct dwarf2_per_cu_data
*per_cu
;
18173 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
18175 /* cu->dependencies references may not yet have been ever read if QUIT aborts
18176 reading of the chain. As such dependencies remain valid it is not much
18177 useful to track and undo them during QUIT cleanups. */
18178 if (per_cu
->cu
== NULL
)
18181 if (per_cu
->cu
->mark
)
18183 per_cu
->cu
->mark
= 1;
18185 if (per_cu
->cu
->dependencies
!= NULL
)
18186 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
18191 /* Set the mark field in CU and in every other compilation unit in the
18192 cache that we must keep because we are keeping CU. */
18195 dwarf2_mark (struct dwarf2_cu
*cu
)
18200 if (cu
->dependencies
!= NULL
)
18201 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
18205 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
18209 per_cu
->cu
->mark
= 0;
18210 per_cu
= per_cu
->cu
->read_in_chain
;
18214 /* Trivial hash function for partial_die_info: the hash value of a DIE
18215 is its offset in .debug_info for this objfile. */
18218 partial_die_hash (const void *item
)
18220 const struct partial_die_info
*part_die
= item
;
18222 return part_die
->offset
.sect_off
;
18225 /* Trivial comparison function for partial_die_info structures: two DIEs
18226 are equal if they have the same offset. */
18229 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
18231 const struct partial_die_info
*part_die_lhs
= item_lhs
;
18232 const struct partial_die_info
*part_die_rhs
= item_rhs
;
18234 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
18237 static struct cmd_list_element
*set_dwarf2_cmdlist
;
18238 static struct cmd_list_element
*show_dwarf2_cmdlist
;
18241 set_dwarf2_cmd (char *args
, int from_tty
)
18243 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
18247 show_dwarf2_cmd (char *args
, int from_tty
)
18249 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
18252 /* If section described by INFO was mmapped, munmap it now. */
18255 munmap_section_buffer (struct dwarf2_section_info
*info
)
18257 if (info
->map_addr
!= NULL
)
18262 res
= munmap (info
->map_addr
, info
->map_len
);
18263 gdb_assert (res
== 0);
18265 /* Without HAVE_MMAP, we should never be here to begin with. */
18266 gdb_assert_not_reached ("no mmap support");
18271 /* munmap debug sections for OBJFILE, if necessary. */
18274 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
18276 struct dwarf2_per_objfile
*data
= d
;
18278 struct dwarf2_section_info
*section
;
18280 /* This is sorted according to the order they're defined in to make it easier
18281 to keep in sync. */
18282 munmap_section_buffer (&data
->info
);
18283 munmap_section_buffer (&data
->abbrev
);
18284 munmap_section_buffer (&data
->line
);
18285 munmap_section_buffer (&data
->loc
);
18286 munmap_section_buffer (&data
->macinfo
);
18287 munmap_section_buffer (&data
->macro
);
18288 munmap_section_buffer (&data
->str
);
18289 munmap_section_buffer (&data
->ranges
);
18290 munmap_section_buffer (&data
->addr
);
18291 munmap_section_buffer (&data
->frame
);
18292 munmap_section_buffer (&data
->eh_frame
);
18293 munmap_section_buffer (&data
->gdb_index
);
18296 VEC_iterate (dwarf2_section_info_def
, data
->types
, ix
, section
);
18298 munmap_section_buffer (section
);
18300 for (ix
= 0; ix
< dwarf2_per_objfile
->n_comp_units
; ++ix
)
18301 VEC_free (dwarf2_per_cu_ptr
,
18302 dwarf2_per_objfile
->all_comp_units
[ix
]->s
.imported_symtabs
);
18304 VEC_free (dwarf2_section_info_def
, data
->types
);
18306 if (data
->dwo_files
)
18307 free_dwo_files (data
->dwo_files
, objfile
);
18311 /* The "save gdb-index" command. */
18313 /* The contents of the hash table we create when building the string
18315 struct strtab_entry
18317 offset_type offset
;
18321 /* Hash function for a strtab_entry.
18323 Function is used only during write_hash_table so no index format backward
18324 compatibility is needed. */
18327 hash_strtab_entry (const void *e
)
18329 const struct strtab_entry
*entry
= e
;
18330 return mapped_index_string_hash (INT_MAX
, entry
->str
);
18333 /* Equality function for a strtab_entry. */
18336 eq_strtab_entry (const void *a
, const void *b
)
18338 const struct strtab_entry
*ea
= a
;
18339 const struct strtab_entry
*eb
= b
;
18340 return !strcmp (ea
->str
, eb
->str
);
18343 /* Create a strtab_entry hash table. */
18346 create_strtab (void)
18348 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
18349 xfree
, xcalloc
, xfree
);
18352 /* Add a string to the constant pool. Return the string's offset in
18356 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
18359 struct strtab_entry entry
;
18360 struct strtab_entry
*result
;
18363 slot
= htab_find_slot (table
, &entry
, INSERT
);
18368 result
= XNEW (struct strtab_entry
);
18369 result
->offset
= obstack_object_size (cpool
);
18371 obstack_grow_str0 (cpool
, str
);
18374 return result
->offset
;
18377 /* An entry in the symbol table. */
18378 struct symtab_index_entry
18380 /* The name of the symbol. */
18382 /* The offset of the name in the constant pool. */
18383 offset_type index_offset
;
18384 /* A sorted vector of the indices of all the CUs that hold an object
18386 VEC (offset_type
) *cu_indices
;
18389 /* The symbol table. This is a power-of-2-sized hash table. */
18390 struct mapped_symtab
18392 offset_type n_elements
;
18394 struct symtab_index_entry
**data
;
18397 /* Hash function for a symtab_index_entry. */
18400 hash_symtab_entry (const void *e
)
18402 const struct symtab_index_entry
*entry
= e
;
18403 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
18404 sizeof (offset_type
) * VEC_length (offset_type
,
18405 entry
->cu_indices
),
18409 /* Equality function for a symtab_index_entry. */
18412 eq_symtab_entry (const void *a
, const void *b
)
18414 const struct symtab_index_entry
*ea
= a
;
18415 const struct symtab_index_entry
*eb
= b
;
18416 int len
= VEC_length (offset_type
, ea
->cu_indices
);
18417 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
18419 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
18420 VEC_address (offset_type
, eb
->cu_indices
),
18421 sizeof (offset_type
) * len
);
18424 /* Destroy a symtab_index_entry. */
18427 delete_symtab_entry (void *p
)
18429 struct symtab_index_entry
*entry
= p
;
18430 VEC_free (offset_type
, entry
->cu_indices
);
18434 /* Create a hash table holding symtab_index_entry objects. */
18437 create_symbol_hash_table (void)
18439 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
18440 delete_symtab_entry
, xcalloc
, xfree
);
18443 /* Create a new mapped symtab object. */
18445 static struct mapped_symtab
*
18446 create_mapped_symtab (void)
18448 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
18449 symtab
->n_elements
= 0;
18450 symtab
->size
= 1024;
18451 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
18455 /* Destroy a mapped_symtab. */
18458 cleanup_mapped_symtab (void *p
)
18460 struct mapped_symtab
*symtab
= p
;
18461 /* The contents of the array are freed when the other hash table is
18463 xfree (symtab
->data
);
18467 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
18470 Function is used only during write_hash_table so no index format backward
18471 compatibility is needed. */
18473 static struct symtab_index_entry
**
18474 find_slot (struct mapped_symtab
*symtab
, const char *name
)
18476 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
18478 index
= hash
& (symtab
->size
- 1);
18479 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
18483 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
18484 return &symtab
->data
[index
];
18485 index
= (index
+ step
) & (symtab
->size
- 1);
18489 /* Expand SYMTAB's hash table. */
18492 hash_expand (struct mapped_symtab
*symtab
)
18494 offset_type old_size
= symtab
->size
;
18496 struct symtab_index_entry
**old_entries
= symtab
->data
;
18499 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
18501 for (i
= 0; i
< old_size
; ++i
)
18503 if (old_entries
[i
])
18505 struct symtab_index_entry
**slot
= find_slot (symtab
,
18506 old_entries
[i
]->name
);
18507 *slot
= old_entries
[i
];
18511 xfree (old_entries
);
18514 /* Add an entry to SYMTAB. NAME is the name of the symbol.
18515 CU_INDEX is the index of the CU in which the symbol appears.
18516 IS_STATIC is one if the symbol is static, otherwise zero (global). */
18519 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
18520 int is_static
, gdb_index_symbol_kind kind
,
18521 offset_type cu_index
)
18523 struct symtab_index_entry
**slot
;
18524 offset_type cu_index_and_attrs
;
18526 ++symtab
->n_elements
;
18527 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
18528 hash_expand (symtab
);
18530 slot
= find_slot (symtab
, name
);
18533 *slot
= XNEW (struct symtab_index_entry
);
18534 (*slot
)->name
= name
;
18535 /* index_offset is set later. */
18536 (*slot
)->cu_indices
= NULL
;
18539 cu_index_and_attrs
= 0;
18540 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
18541 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
18542 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
18544 /* We don't want to record an index value twice as we want to avoid the
18546 We process all global symbols and then all static symbols
18547 (which would allow us to avoid the duplication by only having to check
18548 the last entry pushed), but a symbol could have multiple kinds in one CU.
18549 To keep things simple we don't worry about the duplication here and
18550 sort and uniqufy the list after we've processed all symbols. */
18551 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
18554 /* qsort helper routine for uniquify_cu_indices. */
18557 offset_type_compare (const void *ap
, const void *bp
)
18559 offset_type a
= *(offset_type
*) ap
;
18560 offset_type b
= *(offset_type
*) bp
;
18562 return (a
> b
) - (b
> a
);
18565 /* Sort and remove duplicates of all symbols' cu_indices lists. */
18568 uniquify_cu_indices (struct mapped_symtab
*symtab
)
18572 for (i
= 0; i
< symtab
->size
; ++i
)
18574 struct symtab_index_entry
*entry
= symtab
->data
[i
];
18577 && entry
->cu_indices
!= NULL
)
18579 unsigned int next_to_insert
, next_to_check
;
18580 offset_type last_value
;
18582 qsort (VEC_address (offset_type
, entry
->cu_indices
),
18583 VEC_length (offset_type
, entry
->cu_indices
),
18584 sizeof (offset_type
), offset_type_compare
);
18586 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
18587 next_to_insert
= 1;
18588 for (next_to_check
= 1;
18589 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
18592 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
18595 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
18597 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
18602 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
18607 /* Add a vector of indices to the constant pool. */
18610 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
18611 struct symtab_index_entry
*entry
)
18615 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
18618 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
18619 offset_type val
= MAYBE_SWAP (len
);
18624 entry
->index_offset
= obstack_object_size (cpool
);
18626 obstack_grow (cpool
, &val
, sizeof (val
));
18628 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
18631 val
= MAYBE_SWAP (iter
);
18632 obstack_grow (cpool
, &val
, sizeof (val
));
18637 struct symtab_index_entry
*old_entry
= *slot
;
18638 entry
->index_offset
= old_entry
->index_offset
;
18641 return entry
->index_offset
;
18644 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
18645 constant pool entries going into the obstack CPOOL. */
18648 write_hash_table (struct mapped_symtab
*symtab
,
18649 struct obstack
*output
, struct obstack
*cpool
)
18652 htab_t symbol_hash_table
;
18655 symbol_hash_table
= create_symbol_hash_table ();
18656 str_table
= create_strtab ();
18658 /* We add all the index vectors to the constant pool first, to
18659 ensure alignment is ok. */
18660 for (i
= 0; i
< symtab
->size
; ++i
)
18662 if (symtab
->data
[i
])
18663 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
18666 /* Now write out the hash table. */
18667 for (i
= 0; i
< symtab
->size
; ++i
)
18669 offset_type str_off
, vec_off
;
18671 if (symtab
->data
[i
])
18673 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
18674 vec_off
= symtab
->data
[i
]->index_offset
;
18678 /* While 0 is a valid constant pool index, it is not valid
18679 to have 0 for both offsets. */
18684 str_off
= MAYBE_SWAP (str_off
);
18685 vec_off
= MAYBE_SWAP (vec_off
);
18687 obstack_grow (output
, &str_off
, sizeof (str_off
));
18688 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
18691 htab_delete (str_table
);
18692 htab_delete (symbol_hash_table
);
18695 /* Struct to map psymtab to CU index in the index file. */
18696 struct psymtab_cu_index_map
18698 struct partial_symtab
*psymtab
;
18699 unsigned int cu_index
;
18703 hash_psymtab_cu_index (const void *item
)
18705 const struct psymtab_cu_index_map
*map
= item
;
18707 return htab_hash_pointer (map
->psymtab
);
18711 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
18713 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
18714 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
18716 return lhs
->psymtab
== rhs
->psymtab
;
18719 /* Helper struct for building the address table. */
18720 struct addrmap_index_data
18722 struct objfile
*objfile
;
18723 struct obstack
*addr_obstack
;
18724 htab_t cu_index_htab
;
18726 /* Non-zero if the previous_* fields are valid.
18727 We can't write an entry until we see the next entry (since it is only then
18728 that we know the end of the entry). */
18729 int previous_valid
;
18730 /* Index of the CU in the table of all CUs in the index file. */
18731 unsigned int previous_cu_index
;
18732 /* Start address of the CU. */
18733 CORE_ADDR previous_cu_start
;
18736 /* Write an address entry to OBSTACK. */
18739 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
18740 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
18742 offset_type cu_index_to_write
;
18744 CORE_ADDR baseaddr
;
18746 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18748 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
18749 obstack_grow (obstack
, addr
, 8);
18750 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
18751 obstack_grow (obstack
, addr
, 8);
18752 cu_index_to_write
= MAYBE_SWAP (cu_index
);
18753 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
18756 /* Worker function for traversing an addrmap to build the address table. */
18759 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
18761 struct addrmap_index_data
*data
= datap
;
18762 struct partial_symtab
*pst
= obj
;
18764 if (data
->previous_valid
)
18765 add_address_entry (data
->objfile
, data
->addr_obstack
,
18766 data
->previous_cu_start
, start_addr
,
18767 data
->previous_cu_index
);
18769 data
->previous_cu_start
= start_addr
;
18772 struct psymtab_cu_index_map find_map
, *map
;
18773 find_map
.psymtab
= pst
;
18774 map
= htab_find (data
->cu_index_htab
, &find_map
);
18775 gdb_assert (map
!= NULL
);
18776 data
->previous_cu_index
= map
->cu_index
;
18777 data
->previous_valid
= 1;
18780 data
->previous_valid
= 0;
18785 /* Write OBJFILE's address map to OBSTACK.
18786 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
18787 in the index file. */
18790 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
18791 htab_t cu_index_htab
)
18793 struct addrmap_index_data addrmap_index_data
;
18795 /* When writing the address table, we have to cope with the fact that
18796 the addrmap iterator only provides the start of a region; we have to
18797 wait until the next invocation to get the start of the next region. */
18799 addrmap_index_data
.objfile
= objfile
;
18800 addrmap_index_data
.addr_obstack
= obstack
;
18801 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
18802 addrmap_index_data
.previous_valid
= 0;
18804 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
18805 &addrmap_index_data
);
18807 /* It's highly unlikely the last entry (end address = 0xff...ff)
18808 is valid, but we should still handle it.
18809 The end address is recorded as the start of the next region, but that
18810 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
18812 if (addrmap_index_data
.previous_valid
)
18813 add_address_entry (objfile
, obstack
,
18814 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
18815 addrmap_index_data
.previous_cu_index
);
18818 /* Return the symbol kind of PSYM. */
18820 static gdb_index_symbol_kind
18821 symbol_kind (struct partial_symbol
*psym
)
18823 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
18824 enum address_class aclass
= PSYMBOL_CLASS (psym
);
18832 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
18834 return GDB_INDEX_SYMBOL_KIND_TYPE
;
18836 case LOC_CONST_BYTES
:
18837 case LOC_OPTIMIZED_OUT
:
18839 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
18841 /* Note: It's currently impossible to recognize psyms as enum values
18842 short of reading the type info. For now punt. */
18843 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
18845 /* There are other LOC_FOO values that one might want to classify
18846 as variables, but dwarf2read.c doesn't currently use them. */
18847 return GDB_INDEX_SYMBOL_KIND_OTHER
;
18849 case STRUCT_DOMAIN
:
18850 return GDB_INDEX_SYMBOL_KIND_TYPE
;
18852 return GDB_INDEX_SYMBOL_KIND_OTHER
;
18856 /* Add a list of partial symbols to SYMTAB. */
18859 write_psymbols (struct mapped_symtab
*symtab
,
18861 struct partial_symbol
**psymp
,
18863 offset_type cu_index
,
18866 for (; count
-- > 0; ++psymp
)
18868 struct partial_symbol
*psym
= *psymp
;
18871 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
18872 error (_("Ada is not currently supported by the index"));
18874 /* Only add a given psymbol once. */
18875 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
18878 gdb_index_symbol_kind kind
= symbol_kind (psym
);
18881 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
18882 is_static
, kind
, cu_index
);
18887 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
18888 exception if there is an error. */
18891 write_obstack (FILE *file
, struct obstack
*obstack
)
18893 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
18895 != obstack_object_size (obstack
))
18896 error (_("couldn't data write to file"));
18899 /* Unlink a file if the argument is not NULL. */
18902 unlink_if_set (void *p
)
18904 char **filename
= p
;
18906 unlink (*filename
);
18909 /* A helper struct used when iterating over debug_types. */
18910 struct signatured_type_index_data
18912 struct objfile
*objfile
;
18913 struct mapped_symtab
*symtab
;
18914 struct obstack
*types_list
;
18919 /* A helper function that writes a single signatured_type to an
18923 write_one_signatured_type (void **slot
, void *d
)
18925 struct signatured_type_index_data
*info
= d
;
18926 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
18927 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
18928 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
18931 write_psymbols (info
->symtab
,
18933 info
->objfile
->global_psymbols
.list
18934 + psymtab
->globals_offset
,
18935 psymtab
->n_global_syms
, info
->cu_index
,
18937 write_psymbols (info
->symtab
,
18939 info
->objfile
->static_psymbols
.list
18940 + psymtab
->statics_offset
,
18941 psymtab
->n_static_syms
, info
->cu_index
,
18944 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
18945 entry
->per_cu
.offset
.sect_off
);
18946 obstack_grow (info
->types_list
, val
, 8);
18947 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
18948 entry
->type_offset_in_tu
.cu_off
);
18949 obstack_grow (info
->types_list
, val
, 8);
18950 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
18951 obstack_grow (info
->types_list
, val
, 8);
18958 /* Recurse into all "included" dependencies and write their symbols as
18959 if they appeared in this psymtab. */
18962 recursively_write_psymbols (struct objfile
*objfile
,
18963 struct partial_symtab
*psymtab
,
18964 struct mapped_symtab
*symtab
,
18966 offset_type cu_index
)
18970 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
18971 if (psymtab
->dependencies
[i
]->user
!= NULL
)
18972 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
18973 symtab
, psyms_seen
, cu_index
);
18975 write_psymbols (symtab
,
18977 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
18978 psymtab
->n_global_syms
, cu_index
,
18980 write_psymbols (symtab
,
18982 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
18983 psymtab
->n_static_syms
, cu_index
,
18987 /* Create an index file for OBJFILE in the directory DIR. */
18990 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
18992 struct cleanup
*cleanup
;
18993 char *filename
, *cleanup_filename
;
18994 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
18995 struct obstack cu_list
, types_cu_list
;
18998 struct mapped_symtab
*symtab
;
18999 offset_type val
, size_of_contents
, total_len
;
19002 htab_t cu_index_htab
;
19003 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
19005 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
19008 if (dwarf2_per_objfile
->using_index
)
19009 error (_("Cannot use an index to create the index"));
19011 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
19012 error (_("Cannot make an index when the file has multiple .debug_types sections"));
19014 if (stat (objfile
->name
, &st
) < 0)
19015 perror_with_name (objfile
->name
);
19017 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
19018 INDEX_SUFFIX
, (char *) NULL
);
19019 cleanup
= make_cleanup (xfree
, filename
);
19021 out_file
= fopen (filename
, "wb");
19023 error (_("Can't open `%s' for writing"), filename
);
19025 cleanup_filename
= filename
;
19026 make_cleanup (unlink_if_set
, &cleanup_filename
);
19028 symtab
= create_mapped_symtab ();
19029 make_cleanup (cleanup_mapped_symtab
, symtab
);
19031 obstack_init (&addr_obstack
);
19032 make_cleanup_obstack_free (&addr_obstack
);
19034 obstack_init (&cu_list
);
19035 make_cleanup_obstack_free (&cu_list
);
19037 obstack_init (&types_cu_list
);
19038 make_cleanup_obstack_free (&types_cu_list
);
19040 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
19041 NULL
, xcalloc
, xfree
);
19042 make_cleanup_htab_delete (psyms_seen
);
19044 /* While we're scanning CU's create a table that maps a psymtab pointer
19045 (which is what addrmap records) to its index (which is what is recorded
19046 in the index file). This will later be needed to write the address
19048 cu_index_htab
= htab_create_alloc (100,
19049 hash_psymtab_cu_index
,
19050 eq_psymtab_cu_index
,
19051 NULL
, xcalloc
, xfree
);
19052 make_cleanup_htab_delete (cu_index_htab
);
19053 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
19054 xmalloc (sizeof (struct psymtab_cu_index_map
)
19055 * dwarf2_per_objfile
->n_comp_units
);
19056 make_cleanup (xfree
, psymtab_cu_index_map
);
19058 /* The CU list is already sorted, so we don't need to do additional
19059 work here. Also, the debug_types entries do not appear in
19060 all_comp_units, but only in their own hash table. */
19061 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
19063 struct dwarf2_per_cu_data
*per_cu
19064 = dwarf2_per_objfile
->all_comp_units
[i
];
19065 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
19067 struct psymtab_cu_index_map
*map
;
19070 if (psymtab
->user
== NULL
)
19071 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
19073 map
= &psymtab_cu_index_map
[i
];
19074 map
->psymtab
= psymtab
;
19076 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
19077 gdb_assert (slot
!= NULL
);
19078 gdb_assert (*slot
== NULL
);
19081 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
19082 per_cu
->offset
.sect_off
);
19083 obstack_grow (&cu_list
, val
, 8);
19084 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
19085 obstack_grow (&cu_list
, val
, 8);
19088 /* Dump the address map. */
19089 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
19091 /* Write out the .debug_type entries, if any. */
19092 if (dwarf2_per_objfile
->signatured_types
)
19094 struct signatured_type_index_data sig_data
;
19096 sig_data
.objfile
= objfile
;
19097 sig_data
.symtab
= symtab
;
19098 sig_data
.types_list
= &types_cu_list
;
19099 sig_data
.psyms_seen
= psyms_seen
;
19100 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
19101 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
19102 write_one_signatured_type
, &sig_data
);
19105 /* Now that we've processed all symbols we can shrink their cu_indices
19107 uniquify_cu_indices (symtab
);
19109 obstack_init (&constant_pool
);
19110 make_cleanup_obstack_free (&constant_pool
);
19111 obstack_init (&symtab_obstack
);
19112 make_cleanup_obstack_free (&symtab_obstack
);
19113 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
19115 obstack_init (&contents
);
19116 make_cleanup_obstack_free (&contents
);
19117 size_of_contents
= 6 * sizeof (offset_type
);
19118 total_len
= size_of_contents
;
19120 /* The version number. */
19121 val
= MAYBE_SWAP (7);
19122 obstack_grow (&contents
, &val
, sizeof (val
));
19124 /* The offset of the CU list from the start of the file. */
19125 val
= MAYBE_SWAP (total_len
);
19126 obstack_grow (&contents
, &val
, sizeof (val
));
19127 total_len
+= obstack_object_size (&cu_list
);
19129 /* The offset of the types CU list from the start of the file. */
19130 val
= MAYBE_SWAP (total_len
);
19131 obstack_grow (&contents
, &val
, sizeof (val
));
19132 total_len
+= obstack_object_size (&types_cu_list
);
19134 /* The offset of the address table from the start of the file. */
19135 val
= MAYBE_SWAP (total_len
);
19136 obstack_grow (&contents
, &val
, sizeof (val
));
19137 total_len
+= obstack_object_size (&addr_obstack
);
19139 /* The offset of the symbol table from the start of the file. */
19140 val
= MAYBE_SWAP (total_len
);
19141 obstack_grow (&contents
, &val
, sizeof (val
));
19142 total_len
+= obstack_object_size (&symtab_obstack
);
19144 /* The offset of the constant pool from the start of the file. */
19145 val
= MAYBE_SWAP (total_len
);
19146 obstack_grow (&contents
, &val
, sizeof (val
));
19147 total_len
+= obstack_object_size (&constant_pool
);
19149 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
19151 write_obstack (out_file
, &contents
);
19152 write_obstack (out_file
, &cu_list
);
19153 write_obstack (out_file
, &types_cu_list
);
19154 write_obstack (out_file
, &addr_obstack
);
19155 write_obstack (out_file
, &symtab_obstack
);
19156 write_obstack (out_file
, &constant_pool
);
19160 /* We want to keep the file, so we set cleanup_filename to NULL
19161 here. See unlink_if_set. */
19162 cleanup_filename
= NULL
;
19164 do_cleanups (cleanup
);
19167 /* Implementation of the `save gdb-index' command.
19169 Note that the file format used by this command is documented in the
19170 GDB manual. Any changes here must be documented there. */
19173 save_gdb_index_command (char *arg
, int from_tty
)
19175 struct objfile
*objfile
;
19178 error (_("usage: save gdb-index DIRECTORY"));
19180 ALL_OBJFILES (objfile
)
19184 /* If the objfile does not correspond to an actual file, skip it. */
19185 if (stat (objfile
->name
, &st
) < 0)
19188 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
19189 if (dwarf2_per_objfile
)
19191 volatile struct gdb_exception except
;
19193 TRY_CATCH (except
, RETURN_MASK_ERROR
)
19195 write_psymtabs_to_index (objfile
, arg
);
19197 if (except
.reason
< 0)
19198 exception_fprintf (gdb_stderr
, except
,
19199 _("Error while writing index for `%s': "),
19207 int dwarf2_always_disassemble
;
19210 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
19211 struct cmd_list_element
*c
, const char *value
)
19213 fprintf_filtered (file
,
19214 _("Whether to always disassemble "
19215 "DWARF expressions is %s.\n"),
19220 show_check_physname (struct ui_file
*file
, int from_tty
,
19221 struct cmd_list_element
*c
, const char *value
)
19223 fprintf_filtered (file
,
19224 _("Whether to check \"physname\" is %s.\n"),
19228 void _initialize_dwarf2_read (void);
19231 _initialize_dwarf2_read (void)
19233 struct cmd_list_element
*c
;
19235 dwarf2_objfile_data_key
19236 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
19238 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
19239 Set DWARF 2 specific variables.\n\
19240 Configure DWARF 2 variables such as the cache size"),
19241 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
19242 0/*allow-unknown*/, &maintenance_set_cmdlist
);
19244 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
19245 Show DWARF 2 specific variables\n\
19246 Show DWARF 2 variables such as the cache size"),
19247 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
19248 0/*allow-unknown*/, &maintenance_show_cmdlist
);
19250 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
19251 &dwarf2_max_cache_age
, _("\
19252 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
19253 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
19254 A higher limit means that cached compilation units will be stored\n\
19255 in memory longer, and more total memory will be used. Zero disables\n\
19256 caching, which can slow down startup."),
19258 show_dwarf2_max_cache_age
,
19259 &set_dwarf2_cmdlist
,
19260 &show_dwarf2_cmdlist
);
19262 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
19263 &dwarf2_always_disassemble
, _("\
19264 Set whether `info address' always disassembles DWARF expressions."), _("\
19265 Show whether `info address' always disassembles DWARF expressions."), _("\
19266 When enabled, DWARF expressions are always printed in an assembly-like\n\
19267 syntax. When disabled, expressions will be printed in a more\n\
19268 conversational style, when possible."),
19270 show_dwarf2_always_disassemble
,
19271 &set_dwarf2_cmdlist
,
19272 &show_dwarf2_cmdlist
);
19274 add_setshow_boolean_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
19275 Set debugging of the dwarf2 reader."), _("\
19276 Show debugging of the dwarf2 reader."), _("\
19277 When enabled, debugging messages are printed during dwarf2 reading\n\
19278 and symtab expansion."),
19281 &setdebuglist
, &showdebuglist
);
19283 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
19284 Set debugging of the dwarf2 DIE reader."), _("\
19285 Show debugging of the dwarf2 DIE reader."), _("\
19286 When enabled (non-zero), DIEs are dumped after they are read in.\n\
19287 The value is the maximum depth to print."),
19290 &setdebuglist
, &showdebuglist
);
19292 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
19293 Set cross-checking of \"physname\" code against demangler."), _("\
19294 Show cross-checking of \"physname\" code against demangler."), _("\
19295 When enabled, GDB's internal \"physname\" code is checked against\n\
19297 NULL
, show_check_physname
,
19298 &setdebuglist
, &showdebuglist
);
19300 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
19302 Save a gdb-index file.\n\
19303 Usage: save gdb-index DIRECTORY"),
19305 set_cmd_completer (c
, filename_completer
);