1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
51 #include "typeprint.h"
54 #include "exceptions.h"
56 #include "completer.h"
62 #include "gdb_string.h"
63 #include "gdb_assert.h"
64 #include <sys/types.h>
71 #define MAP_FAILED ((void *) -1)
75 typedef struct symbol
*symbolp
;
79 /* .debug_info header for a compilation unit
80 Because of alignment constraints, this structure has padding and cannot
81 be mapped directly onto the beginning of the .debug_info section. */
82 typedef struct comp_unit_header
84 unsigned int length
; /* length of the .debug_info
86 unsigned short version
; /* version number -- 2 for DWARF
88 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
89 unsigned char addr_size
; /* byte size of an address -- 4 */
92 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
95 /* .debug_line statement program prologue
96 Because of alignment constraints, this structure has padding and cannot
97 be mapped directly onto the beginning of the .debug_info section. */
98 typedef struct statement_prologue
100 unsigned int total_length
; /* byte length of the statement
102 unsigned short version
; /* version number -- 2 for DWARF
104 unsigned int prologue_length
; /* # bytes between prologue &
106 unsigned char minimum_instruction_length
; /* byte size of
108 unsigned char default_is_stmt
; /* initial value of is_stmt
111 unsigned char line_range
;
112 unsigned char opcode_base
; /* number assigned to first special
114 unsigned char *standard_opcode_lengths
;
118 /* When non-zero, dump DIEs after they are read in. */
119 static int dwarf2_die_debug
= 0;
123 /* When set, the file that we're processing is known to have debugging
124 info for C++ namespaces. GCC 3.3.x did not produce this information,
125 but later versions do. */
127 static int processing_has_namespace_info
;
129 static const struct objfile_data
*dwarf2_objfile_data_key
;
131 struct dwarf2_section_info
137 /* True if we have tried to read this section. */
141 /* All offsets in the index are of this type. It must be
142 architecture-independent. */
143 typedef uint32_t offset_type
;
145 DEF_VEC_I (offset_type
);
147 /* A description of the mapped index. The file format is described in
148 a comment by the code that writes the index. */
151 /* The total length of the buffer. */
153 /* A pointer to the address table data. */
154 const gdb_byte
*address_table
;
155 /* Size of the address table data in bytes. */
156 offset_type address_table_size
;
157 /* The symbol table, implemented as a hash table. */
158 const offset_type
*symbol_table
;
159 /* Size in slots, each slot is 2 offset_types. */
160 offset_type symbol_table_slots
;
161 /* A pointer to the constant pool. */
162 const char *constant_pool
;
165 struct dwarf2_per_objfile
167 struct dwarf2_section_info info
;
168 struct dwarf2_section_info abbrev
;
169 struct dwarf2_section_info line
;
170 struct dwarf2_section_info loc
;
171 struct dwarf2_section_info macinfo
;
172 struct dwarf2_section_info str
;
173 struct dwarf2_section_info ranges
;
174 struct dwarf2_section_info types
;
175 struct dwarf2_section_info frame
;
176 struct dwarf2_section_info eh_frame
;
177 struct dwarf2_section_info gdb_index
;
180 struct objfile
*objfile
;
182 /* A list of all the compilation units. This is used to locate
183 the target compilation unit of a particular reference. */
184 struct dwarf2_per_cu_data
**all_comp_units
;
186 /* The number of compilation units in ALL_COMP_UNITS. */
189 /* The number of .debug_types-related CUs. */
190 int n_type_comp_units
;
192 /* The .debug_types-related CUs. */
193 struct dwarf2_per_cu_data
**type_comp_units
;
195 /* A chain of compilation units that are currently read in, so that
196 they can be freed later. */
197 struct dwarf2_per_cu_data
*read_in_chain
;
199 /* A table mapping .debug_types signatures to its signatured_type entry.
200 This is NULL if the .debug_types section hasn't been read in yet. */
201 htab_t signatured_types
;
203 /* A flag indicating wether this objfile has a section loaded at a
205 int has_section_at_zero
;
207 /* True if we are using the mapped index,
208 or we are faking it for OBJF_READNOW's sake. */
209 unsigned char using_index
;
211 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
212 struct mapped_index
*index_table
;
214 /* When using index_table, this keeps track of all quick_file_names entries.
215 TUs can share line table entries with CUs or other TUs, and there can be
216 a lot more TUs than unique line tables, so we maintain a separate table
217 of all line table entries to support the sharing. */
218 htab_t quick_file_names_table
;
220 /* Set during partial symbol reading, to prevent queueing of full
222 int reading_partial_symbols
;
224 /* Table mapping type .debug_info DIE offsets to types.
225 This is NULL if not allocated yet.
226 It (currently) makes sense to allocate debug_types_type_hash lazily.
227 To keep things simple we allocate both lazily. */
228 htab_t debug_info_type_hash
;
230 /* Table mapping type .debug_types DIE offsets to types.
231 This is NULL if not allocated yet. */
232 htab_t debug_types_type_hash
;
235 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
237 /* names of the debugging sections */
239 /* Note that if the debugging section has been compressed, it might
240 have a name like .zdebug_info. */
242 #define INFO_SECTION "debug_info"
243 #define ABBREV_SECTION "debug_abbrev"
244 #define LINE_SECTION "debug_line"
245 #define LOC_SECTION "debug_loc"
246 #define MACINFO_SECTION "debug_macinfo"
247 #define STR_SECTION "debug_str"
248 #define RANGES_SECTION "debug_ranges"
249 #define TYPES_SECTION "debug_types"
250 #define FRAME_SECTION "debug_frame"
251 #define EH_FRAME_SECTION "eh_frame"
252 #define GDB_INDEX_SECTION "gdb_index"
254 /* local data types */
256 /* We hold several abbreviation tables in memory at the same time. */
257 #ifndef ABBREV_HASH_SIZE
258 #define ABBREV_HASH_SIZE 121
261 /* The data in a compilation unit header, after target2host
262 translation, looks like this. */
263 struct comp_unit_head
267 unsigned char addr_size
;
268 unsigned char signed_addr_p
;
269 unsigned int abbrev_offset
;
271 /* Size of file offsets; either 4 or 8. */
272 unsigned int offset_size
;
274 /* Size of the length field; either 4 or 12. */
275 unsigned int initial_length_size
;
277 /* Offset to the first byte of this compilation unit header in the
278 .debug_info section, for resolving relative reference dies. */
281 /* Offset to first die in this cu from the start of the cu.
282 This will be the first byte following the compilation unit header. */
283 unsigned int first_die_offset
;
286 /* Type used for delaying computation of method physnames.
287 See comments for compute_delayed_physnames. */
288 struct delayed_method_info
290 /* The type to which the method is attached, i.e., its parent class. */
293 /* The index of the method in the type's function fieldlists. */
296 /* The index of the method in the fieldlist. */
299 /* The name of the DIE. */
302 /* The DIE associated with this method. */
303 struct die_info
*die
;
306 typedef struct delayed_method_info delayed_method_info
;
307 DEF_VEC_O (delayed_method_info
);
309 /* Internal state when decoding a particular compilation unit. */
312 /* The objfile containing this compilation unit. */
313 struct objfile
*objfile
;
315 /* The header of the compilation unit. */
316 struct comp_unit_head header
;
318 /* Base address of this compilation unit. */
319 CORE_ADDR base_address
;
321 /* Non-zero if base_address has been set. */
324 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
326 /* The language we are debugging. */
327 enum language language
;
328 const struct language_defn
*language_defn
;
330 const char *producer
;
332 /* The generic symbol table building routines have separate lists for
333 file scope symbols and all all other scopes (local scopes). So
334 we need to select the right one to pass to add_symbol_to_list().
335 We do it by keeping a pointer to the correct list in list_in_scope.
337 FIXME: The original dwarf code just treated the file scope as the
338 first local scope, and all other local scopes as nested local
339 scopes, and worked fine. Check to see if we really need to
340 distinguish these in buildsym.c. */
341 struct pending
**list_in_scope
;
343 /* DWARF abbreviation table associated with this compilation unit. */
344 struct abbrev_info
**dwarf2_abbrevs
;
346 /* Storage for the abbrev table. */
347 struct obstack abbrev_obstack
;
349 /* Hash table holding all the loaded partial DIEs. */
352 /* Storage for things with the same lifetime as this read-in compilation
353 unit, including partial DIEs. */
354 struct obstack comp_unit_obstack
;
356 /* When multiple dwarf2_cu structures are living in memory, this field
357 chains them all together, so that they can be released efficiently.
358 We will probably also want a generation counter so that most-recently-used
359 compilation units are cached... */
360 struct dwarf2_per_cu_data
*read_in_chain
;
362 /* Backchain to our per_cu entry if the tree has been built. */
363 struct dwarf2_per_cu_data
*per_cu
;
365 /* How many compilation units ago was this CU last referenced? */
368 /* A hash table of die offsets for following references. */
371 /* Full DIEs if read in. */
372 struct die_info
*dies
;
374 /* A set of pointers to dwarf2_per_cu_data objects for compilation
375 units referenced by this one. Only set during full symbol processing;
376 partial symbol tables do not have dependencies. */
379 /* Header data from the line table, during full symbol processing. */
380 struct line_header
*line_header
;
382 /* A list of methods which need to have physnames computed
383 after all type information has been read. */
384 VEC (delayed_method_info
) *method_list
;
386 /* Mark used when releasing cached dies. */
387 unsigned int mark
: 1;
389 /* This flag will be set if this compilation unit might include
390 inter-compilation-unit references. */
391 unsigned int has_form_ref_addr
: 1;
393 /* This flag will be set if this compilation unit includes any
394 DW_TAG_namespace DIEs. If we know that there are explicit
395 DIEs for namespaces, we don't need to try to infer them
396 from mangled names. */
397 unsigned int has_namespace_info
: 1;
400 /* Persistent data held for a compilation unit, even when not
401 processing it. We put a pointer to this structure in the
402 read_symtab_private field of the psymtab. If we encounter
403 inter-compilation-unit references, we also maintain a sorted
404 list of all compilation units. */
406 struct dwarf2_per_cu_data
408 /* The start offset and length of this compilation unit. 2**29-1
409 bytes should suffice to store the length of any compilation unit
410 - if it doesn't, GDB will fall over anyway.
411 NOTE: Unlike comp_unit_head.length, this length includes
412 initial_length_size. */
414 unsigned int length
: 29;
416 /* Flag indicating this compilation unit will be read in before
417 any of the current compilation units are processed. */
418 unsigned int queued
: 1;
420 /* This flag will be set if we need to load absolutely all DIEs
421 for this compilation unit, instead of just the ones we think
422 are interesting. It gets set if we look for a DIE in the
423 hash table and don't find it. */
424 unsigned int load_all_dies
: 1;
426 /* Non-zero if this CU is from .debug_types.
427 Otherwise it's from .debug_info. */
428 unsigned int from_debug_types
: 1;
430 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
431 of the CU cache it gets reset to NULL again. */
432 struct dwarf2_cu
*cu
;
434 /* The corresponding objfile. */
435 struct objfile
*objfile
;
437 /* When using partial symbol tables, the 'psymtab' field is active.
438 Otherwise the 'quick' field is active. */
441 /* The partial symbol table associated with this compilation unit,
442 or NULL for partial units (which do not have an associated
444 struct partial_symtab
*psymtab
;
446 /* Data needed by the "quick" functions. */
447 struct dwarf2_per_cu_quick_data
*quick
;
451 /* Entry in the signatured_types hash table. */
453 struct signatured_type
457 /* Offset in .debug_types of the TU (type_unit) for this type. */
460 /* Offset in .debug_types of the type defined by this TU. */
461 unsigned int type_offset
;
463 /* The CU(/TU) of this type. */
464 struct dwarf2_per_cu_data per_cu
;
467 /* Struct used to pass misc. parameters to read_die_and_children, et
468 al. which are used for both .debug_info and .debug_types dies.
469 All parameters here are unchanging for the life of the call. This
470 struct exists to abstract away the constant parameters of die
473 struct die_reader_specs
475 /* The bfd of this objfile. */
478 /* The CU of the DIE we are parsing. */
479 struct dwarf2_cu
*cu
;
481 /* Pointer to start of section buffer.
482 This is either the start of .debug_info or .debug_types. */
483 const gdb_byte
*buffer
;
486 /* The line number information for a compilation unit (found in the
487 .debug_line section) begins with a "statement program header",
488 which contains the following information. */
491 unsigned int total_length
;
492 unsigned short version
;
493 unsigned int header_length
;
494 unsigned char minimum_instruction_length
;
495 unsigned char maximum_ops_per_instruction
;
496 unsigned char default_is_stmt
;
498 unsigned char line_range
;
499 unsigned char opcode_base
;
501 /* standard_opcode_lengths[i] is the number of operands for the
502 standard opcode whose value is i. This means that
503 standard_opcode_lengths[0] is unused, and the last meaningful
504 element is standard_opcode_lengths[opcode_base - 1]. */
505 unsigned char *standard_opcode_lengths
;
507 /* The include_directories table. NOTE! These strings are not
508 allocated with xmalloc; instead, they are pointers into
509 debug_line_buffer. If you try to free them, `free' will get
511 unsigned int num_include_dirs
, include_dirs_size
;
514 /* The file_names table. NOTE! These strings are not allocated
515 with xmalloc; instead, they are pointers into debug_line_buffer.
516 Don't try to free them directly. */
517 unsigned int num_file_names
, file_names_size
;
521 unsigned int dir_index
;
522 unsigned int mod_time
;
524 int included_p
; /* Non-zero if referenced by the Line Number Program. */
525 struct symtab
*symtab
; /* The associated symbol table, if any. */
528 /* The start and end of the statement program following this
529 header. These point into dwarf2_per_objfile->line_buffer. */
530 gdb_byte
*statement_program_start
, *statement_program_end
;
533 /* When we construct a partial symbol table entry we only
534 need this much information. */
535 struct partial_die_info
537 /* Offset of this DIE. */
540 /* DWARF-2 tag for this DIE. */
541 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
543 /* Assorted flags describing the data found in this DIE. */
544 unsigned int has_children
: 1;
545 unsigned int is_external
: 1;
546 unsigned int is_declaration
: 1;
547 unsigned int has_type
: 1;
548 unsigned int has_specification
: 1;
549 unsigned int has_pc_info
: 1;
551 /* Flag set if the SCOPE field of this structure has been
553 unsigned int scope_set
: 1;
555 /* Flag set if the DIE has a byte_size attribute. */
556 unsigned int has_byte_size
: 1;
558 /* Flag set if any of the DIE's children are template arguments. */
559 unsigned int has_template_arguments
: 1;
561 /* Flag set if fixup_partial_die has been called on this die. */
562 unsigned int fixup_called
: 1;
564 /* The name of this DIE. Normally the value of DW_AT_name, but
565 sometimes a default name for unnamed DIEs. */
568 /* The linkage name, if present. */
569 const char *linkage_name
;
571 /* The scope to prepend to our children. This is generally
572 allocated on the comp_unit_obstack, so will disappear
573 when this compilation unit leaves the cache. */
576 /* The location description associated with this DIE, if any. */
577 struct dwarf_block
*locdesc
;
579 /* If HAS_PC_INFO, the PC range associated with this DIE. */
583 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
584 DW_AT_sibling, if any. */
585 /* NOTE: This member isn't strictly necessary, read_partial_die could
586 return DW_AT_sibling values to its caller load_partial_dies. */
589 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
590 DW_AT_specification (or DW_AT_abstract_origin or
592 unsigned int spec_offset
;
594 /* Pointers to this DIE's parent, first child, and next sibling,
596 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
599 /* This data structure holds the information of an abbrev. */
602 unsigned int number
; /* number identifying abbrev */
603 enum dwarf_tag tag
; /* dwarf tag */
604 unsigned short has_children
; /* boolean */
605 unsigned short num_attrs
; /* number of attributes */
606 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
607 struct abbrev_info
*next
; /* next in chain */
612 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
613 ENUM_BITFIELD(dwarf_form
) form
: 16;
616 /* Attributes have a name and a value. */
619 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
620 ENUM_BITFIELD(dwarf_form
) form
: 15;
622 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
623 field should be in u.str (existing only for DW_STRING) but it is kept
624 here for better struct attribute alignment. */
625 unsigned int string_is_canonical
: 1;
630 struct dwarf_block
*blk
;
634 struct signatured_type
*signatured_type
;
639 /* This data structure holds a complete die structure. */
642 /* DWARF-2 tag for this DIE. */
643 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
645 /* Number of attributes */
646 unsigned char num_attrs
;
648 /* True if we're presently building the full type name for the
649 type derived from this DIE. */
650 unsigned char building_fullname
: 1;
655 /* Offset in .debug_info or .debug_types section. */
658 /* The dies in a compilation unit form an n-ary tree. PARENT
659 points to this die's parent; CHILD points to the first child of
660 this node; and all the children of a given node are chained
661 together via their SIBLING fields. */
662 struct die_info
*child
; /* Its first child, if any. */
663 struct die_info
*sibling
; /* Its next sibling, if any. */
664 struct die_info
*parent
; /* Its parent, if any. */
666 /* An array of attributes, with NUM_ATTRS elements. There may be
667 zero, but it's not common and zero-sized arrays are not
668 sufficiently portable C. */
669 struct attribute attrs
[1];
672 struct function_range
675 CORE_ADDR lowpc
, highpc
;
677 struct function_range
*next
;
680 /* Get at parts of an attribute structure. */
682 #define DW_STRING(attr) ((attr)->u.str)
683 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
684 #define DW_UNSND(attr) ((attr)->u.unsnd)
685 #define DW_BLOCK(attr) ((attr)->u.blk)
686 #define DW_SND(attr) ((attr)->u.snd)
687 #define DW_ADDR(attr) ((attr)->u.addr)
688 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
690 /* Blocks are a bunch of untyped bytes. */
697 #ifndef ATTR_ALLOC_CHUNK
698 #define ATTR_ALLOC_CHUNK 4
701 /* Allocate fields for structs, unions and enums in this size. */
702 #ifndef DW_FIELD_ALLOC_CHUNK
703 #define DW_FIELD_ALLOC_CHUNK 4
706 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
707 but this would require a corresponding change in unpack_field_as_long
709 static int bits_per_byte
= 8;
711 /* The routines that read and process dies for a C struct or C++ class
712 pass lists of data member fields and lists of member function fields
713 in an instance of a field_info structure, as defined below. */
716 /* List of data member and baseclasses fields. */
719 struct nextfield
*next
;
724 *fields
, *baseclasses
;
726 /* Number of fields (including baseclasses). */
729 /* Number of baseclasses. */
732 /* Set if the accesibility of one of the fields is not public. */
733 int non_public_fields
;
735 /* Member function fields array, entries are allocated in the order they
736 are encountered in the object file. */
739 struct nextfnfield
*next
;
740 struct fn_field fnfield
;
744 /* Member function fieldlist array, contains name of possibly overloaded
745 member function, number of overloaded member functions and a pointer
746 to the head of the member function field chain. */
751 struct nextfnfield
*head
;
755 /* Number of entries in the fnfieldlists array. */
758 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
759 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
760 struct typedef_field_list
762 struct typedef_field field
;
763 struct typedef_field_list
*next
;
766 unsigned typedef_field_list_count
;
769 /* One item on the queue of compilation units to read in full symbols
771 struct dwarf2_queue_item
773 struct dwarf2_per_cu_data
*per_cu
;
774 struct dwarf2_queue_item
*next
;
777 /* The current queue. */
778 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
780 /* Loaded secondary compilation units are kept in memory until they
781 have not been referenced for the processing of this many
782 compilation units. Set this to zero to disable caching. Cache
783 sizes of up to at least twenty will improve startup time for
784 typical inter-CU-reference binaries, at an obvious memory cost. */
785 static int dwarf2_max_cache_age
= 5;
787 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
788 struct cmd_list_element
*c
, const char *value
)
790 fprintf_filtered (file
, _("The upper bound on the age of cached "
791 "dwarf2 compilation units is %s.\n"),
796 /* Various complaints about symbol reading that don't abort the process. */
799 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
801 complaint (&symfile_complaints
,
802 _("statement list doesn't fit in .debug_line section"));
806 dwarf2_debug_line_missing_file_complaint (void)
808 complaint (&symfile_complaints
,
809 _(".debug_line section has line data without a file"));
813 dwarf2_debug_line_missing_end_sequence_complaint (void)
815 complaint (&symfile_complaints
,
816 _(".debug_line section has line "
817 "program sequence without an end"));
821 dwarf2_complex_location_expr_complaint (void)
823 complaint (&symfile_complaints
, _("location expression too complex"));
827 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
830 complaint (&symfile_complaints
,
831 _("const value length mismatch for '%s', got %d, expected %d"),
836 dwarf2_macros_too_long_complaint (void)
838 complaint (&symfile_complaints
,
839 _("macro info runs off end of `.debug_macinfo' section"));
843 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
845 complaint (&symfile_complaints
,
846 _("macro debug info contains a "
847 "malformed macro definition:\n`%s'"),
852 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
854 complaint (&symfile_complaints
,
855 _("invalid attribute class or form for '%s' in '%s'"),
859 /* local function prototypes */
861 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
863 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
866 static void dwarf2_build_psymtabs_hard (struct objfile
*);
868 static void scan_partial_symbols (struct partial_die_info
*,
869 CORE_ADDR
*, CORE_ADDR
*,
870 int, struct dwarf2_cu
*);
872 static void add_partial_symbol (struct partial_die_info
*,
875 static void add_partial_namespace (struct partial_die_info
*pdi
,
876 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
877 int need_pc
, struct dwarf2_cu
*cu
);
879 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
880 CORE_ADDR
*highpc
, int need_pc
,
881 struct dwarf2_cu
*cu
);
883 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
884 struct dwarf2_cu
*cu
);
886 static void add_partial_subprogram (struct partial_die_info
*pdi
,
887 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
888 int need_pc
, struct dwarf2_cu
*cu
);
890 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
891 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
892 bfd
*abfd
, struct dwarf2_cu
*cu
);
894 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
896 static void psymtab_to_symtab_1 (struct partial_symtab
*);
898 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
900 static void dwarf2_free_abbrev_table (void *);
902 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
905 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
908 static struct partial_die_info
*load_partial_dies (bfd
*,
909 gdb_byte
*, gdb_byte
*,
910 int, struct dwarf2_cu
*);
912 static gdb_byte
*read_partial_die (struct partial_die_info
*,
913 struct abbrev_info
*abbrev
,
915 gdb_byte
*, gdb_byte
*,
918 static struct partial_die_info
*find_partial_die (unsigned int,
921 static void fixup_partial_die (struct partial_die_info
*,
924 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
925 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
927 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
928 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
930 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
932 static int read_1_signed_byte (bfd
*, gdb_byte
*);
934 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
936 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
938 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
940 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
943 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
945 static LONGEST read_checked_initial_length_and_offset
946 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
947 unsigned int *, unsigned int *);
949 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
952 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
954 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
956 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
958 static char *read_indirect_string (bfd
*, gdb_byte
*,
959 const struct comp_unit_head
*,
962 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
964 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
966 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
968 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
970 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
973 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
977 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
978 struct dwarf2_cu
*cu
);
980 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
982 static struct die_info
*die_specification (struct die_info
*die
,
983 struct dwarf2_cu
**);
985 static void free_line_header (struct line_header
*lh
);
987 static void add_file_name (struct line_header
*, char *, unsigned int,
988 unsigned int, unsigned int);
990 static struct line_header
*(dwarf_decode_line_header
991 (unsigned int offset
,
992 bfd
*abfd
, struct dwarf2_cu
*cu
));
994 static void dwarf_decode_lines (struct line_header
*, const char *, bfd
*,
995 struct dwarf2_cu
*, struct partial_symtab
*);
997 static void dwarf2_start_subfile (char *, const char *, const char *);
999 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1000 struct dwarf2_cu
*);
1002 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1003 struct dwarf2_cu
*, struct symbol
*);
1005 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1006 struct dwarf2_cu
*);
1008 static void dwarf2_const_value_attr (struct attribute
*attr
,
1011 struct obstack
*obstack
,
1012 struct dwarf2_cu
*cu
, long *value
,
1014 struct dwarf2_locexpr_baton
**baton
);
1016 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1018 static int need_gnat_info (struct dwarf2_cu
*);
1020 static struct type
*die_descriptive_type (struct die_info
*,
1021 struct dwarf2_cu
*);
1023 static void set_descriptive_type (struct type
*, struct die_info
*,
1024 struct dwarf2_cu
*);
1026 static struct type
*die_containing_type (struct die_info
*,
1027 struct dwarf2_cu
*);
1029 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1030 struct dwarf2_cu
*);
1032 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1034 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1036 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1038 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1039 const char *suffix
, int physname
,
1040 struct dwarf2_cu
*cu
);
1042 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1044 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1046 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1048 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1050 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1051 struct dwarf2_cu
*, struct partial_symtab
*);
1053 static int dwarf2_get_pc_bounds (struct die_info
*,
1054 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1055 struct partial_symtab
*);
1057 static void get_scope_pc_bounds (struct die_info
*,
1058 CORE_ADDR
*, CORE_ADDR
*,
1059 struct dwarf2_cu
*);
1061 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1062 CORE_ADDR
, struct dwarf2_cu
*);
1064 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1065 struct dwarf2_cu
*);
1067 static void dwarf2_attach_fields_to_type (struct field_info
*,
1068 struct type
*, struct dwarf2_cu
*);
1070 static void dwarf2_add_member_fn (struct field_info
*,
1071 struct die_info
*, struct type
*,
1072 struct dwarf2_cu
*);
1074 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1076 struct dwarf2_cu
*);
1078 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1080 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1082 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1084 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1086 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1088 static struct type
*read_module_type (struct die_info
*die
,
1089 struct dwarf2_cu
*cu
);
1091 static const char *namespace_name (struct die_info
*die
,
1092 int *is_anonymous
, struct dwarf2_cu
*);
1094 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1096 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1098 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1099 struct dwarf2_cu
*);
1101 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
1103 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
1105 gdb_byte
**new_info_ptr
,
1106 struct die_info
*parent
);
1108 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
1110 gdb_byte
**new_info_ptr
,
1111 struct die_info
*parent
);
1113 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
1115 gdb_byte
**new_info_ptr
,
1116 struct die_info
*parent
);
1118 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
1119 struct die_info
**, gdb_byte
*,
1122 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1124 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1127 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1129 static const char *dwarf2_full_name (char *name
,
1130 struct die_info
*die
,
1131 struct dwarf2_cu
*cu
);
1133 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1134 struct dwarf2_cu
**);
1136 static char *dwarf_tag_name (unsigned int);
1138 static char *dwarf_attr_name (unsigned int);
1140 static char *dwarf_form_name (unsigned int);
1142 static char *dwarf_bool_name (unsigned int);
1144 static char *dwarf_type_encoding_name (unsigned int);
1147 static char *dwarf_cfi_name (unsigned int);
1150 static struct die_info
*sibling_die (struct die_info
*);
1152 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1154 static void dump_die_for_error (struct die_info
*);
1156 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1159 /*static*/ void dump_die (struct die_info
*, int max_level
);
1161 static void store_in_ref_table (struct die_info
*,
1162 struct dwarf2_cu
*);
1164 static int is_ref_attr (struct attribute
*);
1166 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1168 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1170 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1172 struct dwarf2_cu
**);
1174 static struct die_info
*follow_die_ref (struct die_info
*,
1176 struct dwarf2_cu
**);
1178 static struct die_info
*follow_die_sig (struct die_info
*,
1180 struct dwarf2_cu
**);
1182 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1183 unsigned int offset
);
1185 static void read_signatured_type (struct objfile
*,
1186 struct signatured_type
*type_sig
);
1188 /* memory allocation interface */
1190 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1192 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1194 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1196 static void initialize_cu_func_list (struct dwarf2_cu
*);
1198 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1199 struct dwarf2_cu
*);
1201 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1202 char *, bfd
*, struct dwarf2_cu
*);
1204 static int attr_form_is_block (struct attribute
*);
1206 static int attr_form_is_section_offset (struct attribute
*);
1208 static int attr_form_is_constant (struct attribute
*);
1210 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1211 struct dwarf2_loclist_baton
*baton
,
1212 struct attribute
*attr
);
1214 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1216 struct dwarf2_cu
*cu
);
1218 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1219 struct abbrev_info
*abbrev
,
1220 struct dwarf2_cu
*cu
);
1222 static void free_stack_comp_unit (void *);
1224 static hashval_t
partial_die_hash (const void *item
);
1226 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1228 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1229 (unsigned int offset
, struct objfile
*objfile
);
1231 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1232 (unsigned int offset
, struct objfile
*objfile
);
1234 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1235 struct objfile
*objfile
);
1237 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1238 struct die_info
*comp_unit_die
);
1240 static void free_one_comp_unit (void *);
1242 static void free_cached_comp_units (void *);
1244 static void age_cached_comp_units (void);
1246 static void free_one_cached_comp_unit (void *);
1248 static struct type
*set_die_type (struct die_info
*, struct type
*,
1249 struct dwarf2_cu
*);
1251 static void create_all_comp_units (struct objfile
*);
1253 static int create_debug_types_hash_table (struct objfile
*objfile
);
1255 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1258 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1260 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1261 struct dwarf2_per_cu_data
*);
1263 static void dwarf2_mark (struct dwarf2_cu
*);
1265 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1267 static struct type
*get_die_type_at_offset (unsigned int,
1268 struct dwarf2_per_cu_data
*per_cu
);
1270 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1272 static void dwarf2_release_queue (void *dummy
);
1274 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1275 struct objfile
*objfile
);
1277 static void process_queue (struct objfile
*objfile
);
1279 static void find_file_and_directory (struct die_info
*die
,
1280 struct dwarf2_cu
*cu
,
1281 char **name
, char **comp_dir
);
1283 static char *file_full_name (int file
, struct line_header
*lh
,
1284 const char *comp_dir
);
1286 static gdb_byte
*partial_read_comp_unit_head (struct comp_unit_head
*header
,
1289 unsigned int buffer_size
,
1292 static void init_cu_die_reader (struct die_reader_specs
*reader
,
1293 struct dwarf2_cu
*cu
);
1295 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1299 /* Convert VALUE between big- and little-endian. */
1301 byte_swap (offset_type value
)
1305 result
= (value
& 0xff) << 24;
1306 result
|= (value
& 0xff00) << 8;
1307 result
|= (value
& 0xff0000) >> 8;
1308 result
|= (value
& 0xff000000) >> 24;
1312 #define MAYBE_SWAP(V) byte_swap (V)
1315 #define MAYBE_SWAP(V) (V)
1316 #endif /* WORDS_BIGENDIAN */
1318 /* The suffix for an index file. */
1319 #define INDEX_SUFFIX ".gdb-index"
1321 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1322 struct dwarf2_cu
*cu
);
1324 /* Try to locate the sections we need for DWARF 2 debugging
1325 information and return true if we have enough to do something. */
1328 dwarf2_has_info (struct objfile
*objfile
)
1330 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1331 if (!dwarf2_per_objfile
)
1333 /* Initialize per-objfile state. */
1334 struct dwarf2_per_objfile
*data
1335 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1337 memset (data
, 0, sizeof (*data
));
1338 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1339 dwarf2_per_objfile
= data
;
1341 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1342 dwarf2_per_objfile
->objfile
= objfile
;
1344 return (dwarf2_per_objfile
->info
.asection
!= NULL
1345 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1348 /* When loading sections, we can either look for ".<name>", or for
1349 * ".z<name>", which indicates a compressed section. */
1352 section_is_p (const char *section_name
, const char *name
)
1354 return (section_name
[0] == '.'
1355 && (strcmp (section_name
+ 1, name
) == 0
1356 || (section_name
[1] == 'z'
1357 && strcmp (section_name
+ 2, name
) == 0)));
1360 /* This function is mapped across the sections and remembers the
1361 offset and size of each of the debugging sections we are interested
1365 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1367 if (section_is_p (sectp
->name
, INFO_SECTION
))
1369 dwarf2_per_objfile
->info
.asection
= sectp
;
1370 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1372 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1374 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1375 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1377 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1379 dwarf2_per_objfile
->line
.asection
= sectp
;
1380 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1382 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1384 dwarf2_per_objfile
->loc
.asection
= sectp
;
1385 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1387 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1389 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1390 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1392 else if (section_is_p (sectp
->name
, STR_SECTION
))
1394 dwarf2_per_objfile
->str
.asection
= sectp
;
1395 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1397 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1399 dwarf2_per_objfile
->frame
.asection
= sectp
;
1400 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1402 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1404 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1406 if (aflag
& SEC_HAS_CONTENTS
)
1408 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1409 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1412 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1414 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1415 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1417 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1419 dwarf2_per_objfile
->types
.asection
= sectp
;
1420 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1422 else if (section_is_p (sectp
->name
, GDB_INDEX_SECTION
))
1424 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1425 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1428 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1429 && bfd_section_vma (abfd
, sectp
) == 0)
1430 dwarf2_per_objfile
->has_section_at_zero
= 1;
1433 /* Decompress a section that was compressed using zlib. Store the
1434 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1437 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1438 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1440 bfd
*abfd
= objfile
->obfd
;
1442 error (_("Support for zlib-compressed DWARF data (from '%s') "
1443 "is disabled in this copy of GDB"),
1444 bfd_get_filename (abfd
));
1446 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1447 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1448 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1449 bfd_size_type uncompressed_size
;
1450 gdb_byte
*uncompressed_buffer
;
1453 int header_size
= 12;
1455 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1456 || bfd_bread (compressed_buffer
,
1457 compressed_size
, abfd
) != compressed_size
)
1458 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1459 bfd_get_filename (abfd
));
1461 /* Read the zlib header. In this case, it should be "ZLIB" followed
1462 by the uncompressed section size, 8 bytes in big-endian order. */
1463 if (compressed_size
< header_size
1464 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1465 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1466 bfd_get_filename (abfd
));
1467 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1468 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1469 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1470 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1471 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1472 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1473 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1474 uncompressed_size
+= compressed_buffer
[11];
1476 /* It is possible the section consists of several compressed
1477 buffers concatenated together, so we uncompress in a loop. */
1481 strm
.avail_in
= compressed_size
- header_size
;
1482 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1483 strm
.avail_out
= uncompressed_size
;
1484 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1486 rc
= inflateInit (&strm
);
1487 while (strm
.avail_in
> 0)
1490 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1491 bfd_get_filename (abfd
), rc
);
1492 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1493 + (uncompressed_size
- strm
.avail_out
));
1494 rc
= inflate (&strm
, Z_FINISH
);
1495 if (rc
!= Z_STREAM_END
)
1496 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1497 bfd_get_filename (abfd
), rc
);
1498 rc
= inflateReset (&strm
);
1500 rc
= inflateEnd (&strm
);
1502 || strm
.avail_out
!= 0)
1503 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1504 bfd_get_filename (abfd
), rc
);
1506 do_cleanups (cleanup
);
1507 *outbuf
= uncompressed_buffer
;
1508 *outsize
= uncompressed_size
;
1512 /* Read the contents of the section SECTP from object file specified by
1513 OBJFILE, store info about the section into INFO.
1514 If the section is compressed, uncompress it before returning. */
1517 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1519 bfd
*abfd
= objfile
->obfd
;
1520 asection
*sectp
= info
->asection
;
1521 gdb_byte
*buf
, *retbuf
;
1522 unsigned char header
[4];
1526 info
->buffer
= NULL
;
1527 info
->was_mmapped
= 0;
1530 if (info
->asection
== NULL
|| info
->size
== 0)
1533 /* Check if the file has a 4-byte header indicating compression. */
1534 if (info
->size
> sizeof (header
)
1535 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1536 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1538 /* Upon decompression, update the buffer and its size. */
1539 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1541 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1549 pagesize
= getpagesize ();
1551 /* Only try to mmap sections which are large enough: we don't want to
1552 waste space due to fragmentation. Also, only try mmap for sections
1553 without relocations. */
1555 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1557 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1558 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1559 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1560 MAP_PRIVATE
, pg_offset
);
1562 if (retbuf
!= MAP_FAILED
)
1564 info
->was_mmapped
= 1;
1565 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1566 #if HAVE_POSIX_MADVISE
1567 posix_madvise (retbuf
, map_length
, POSIX_MADV_WILLNEED
);
1574 /* If we get here, we are a normal, not-compressed section. */
1576 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1578 /* When debugging .o files, we may need to apply relocations; see
1579 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1580 We never compress sections in .o files, so we only need to
1581 try this when the section is not compressed. */
1582 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1585 info
->buffer
= retbuf
;
1589 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1590 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1591 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1592 bfd_get_filename (abfd
));
1595 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1599 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1600 asection
**sectp
, gdb_byte
**bufp
,
1601 bfd_size_type
*sizep
)
1603 struct dwarf2_per_objfile
*data
1604 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1605 struct dwarf2_section_info
*info
;
1607 /* We may see an objfile without any DWARF, in which case we just
1616 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1617 info
= &data
->eh_frame
;
1618 else if (section_is_p (section_name
, FRAME_SECTION
))
1619 info
= &data
->frame
;
1621 gdb_assert_not_reached ("unexpected section");
1623 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1624 /* We haven't read this section in yet. Do it now. */
1625 dwarf2_read_section (objfile
, info
);
1627 *sectp
= info
->asection
;
1628 *bufp
= info
->buffer
;
1629 *sizep
= info
->size
;
1633 /* DWARF quick_symbols_functions support. */
1635 /* TUs can share .debug_line entries, and there can be a lot more TUs than
1636 unique line tables, so we maintain a separate table of all .debug_line
1637 derived entries to support the sharing.
1638 All the quick functions need is the list of file names. We discard the
1639 line_header when we're done and don't need to record it here. */
1640 struct quick_file_names
1642 /* The offset in .debug_line of the line table. We hash on this. */
1643 unsigned int offset
;
1645 /* The number of entries in file_names, real_names. */
1646 unsigned int num_file_names
;
1648 /* The file names from the line table, after being run through
1650 const char **file_names
;
1652 /* The file names from the line table after being run through
1653 gdb_realpath. These are computed lazily. */
1654 const char **real_names
;
1657 /* When using the index (and thus not using psymtabs), each CU has an
1658 object of this type. This is used to hold information needed by
1659 the various "quick" methods. */
1660 struct dwarf2_per_cu_quick_data
1662 /* The file table. This can be NULL if there was no file table
1663 or it's currently not read in.
1664 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
1665 struct quick_file_names
*file_names
;
1667 /* The corresponding symbol table. This is NULL if symbols for this
1668 CU have not yet been read. */
1669 struct symtab
*symtab
;
1671 /* A temporary mark bit used when iterating over all CUs in
1672 expand_symtabs_matching. */
1673 unsigned int mark
: 1;
1675 /* True if we've tried to read the file table and found there isn't one.
1676 There will be no point in trying to read it again next time. */
1677 unsigned int no_file_data
: 1;
1680 /* Hash function for a quick_file_names. */
1683 hash_file_name_entry (const void *e
)
1685 const struct quick_file_names
*file_data
= e
;
1687 return file_data
->offset
;
1690 /* Equality function for a quick_file_names. */
1693 eq_file_name_entry (const void *a
, const void *b
)
1695 const struct quick_file_names
*ea
= a
;
1696 const struct quick_file_names
*eb
= b
;
1698 return ea
->offset
== eb
->offset
;
1701 /* Delete function for a quick_file_names. */
1704 delete_file_name_entry (void *e
)
1706 struct quick_file_names
*file_data
= e
;
1709 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
1711 xfree ((void*) file_data
->file_names
[i
]);
1712 if (file_data
->real_names
)
1713 xfree ((void*) file_data
->real_names
[i
]);
1716 /* The space for the struct itself lives on objfile_obstack,
1717 so we don't free it here. */
1720 /* Create a quick_file_names hash table. */
1723 create_quick_file_names_table (unsigned int nr_initial_entries
)
1725 return htab_create_alloc (nr_initial_entries
,
1726 hash_file_name_entry
, eq_file_name_entry
,
1727 delete_file_name_entry
, xcalloc
, xfree
);
1730 /* Read in the symbols for PER_CU. OBJFILE is the objfile from which
1734 dw2_do_instantiate_symtab (struct objfile
*objfile
,
1735 struct dwarf2_per_cu_data
*per_cu
)
1737 struct cleanup
*back_to
;
1739 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
1741 queue_comp_unit (per_cu
, objfile
);
1743 if (per_cu
->from_debug_types
)
1744 read_signatured_type_at_offset (objfile
, per_cu
->offset
);
1746 load_full_comp_unit (per_cu
, objfile
);
1748 process_queue (objfile
);
1750 /* Age the cache, releasing compilation units that have not
1751 been used recently. */
1752 age_cached_comp_units ();
1754 do_cleanups (back_to
);
1757 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1758 the objfile from which this CU came. Returns the resulting symbol
1761 static struct symtab
*
1762 dw2_instantiate_symtab (struct objfile
*objfile
,
1763 struct dwarf2_per_cu_data
*per_cu
)
1765 if (!per_cu
->v
.quick
->symtab
)
1767 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1768 increment_reading_symtab ();
1769 dw2_do_instantiate_symtab (objfile
, per_cu
);
1770 do_cleanups (back_to
);
1772 return per_cu
->v
.quick
->symtab
;
1775 /* Return the CU given its index. */
1777 static struct dwarf2_per_cu_data
*
1778 dw2_get_cu (int index
)
1780 if (index
>= dwarf2_per_objfile
->n_comp_units
)
1782 index
-= dwarf2_per_objfile
->n_comp_units
;
1783 return dwarf2_per_objfile
->type_comp_units
[index
];
1785 return dwarf2_per_objfile
->all_comp_units
[index
];
1788 /* A helper function that knows how to read a 64-bit value in a way
1789 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1793 extract_cu_value (const char *bytes
, ULONGEST
*result
)
1795 if (sizeof (ULONGEST
) < 8)
1799 /* Ignore the upper 4 bytes if they are all zero. */
1800 for (i
= 0; i
< 4; ++i
)
1801 if (bytes
[i
+ 4] != 0)
1804 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
1807 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
1811 /* Read the CU list from the mapped index, and use it to create all
1812 the CU objects for this objfile. Return 0 if something went wrong,
1813 1 if everything went ok. */
1816 create_cus_from_index (struct objfile
*objfile
, const gdb_byte
*cu_list
,
1817 offset_type cu_list_elements
)
1821 dwarf2_per_objfile
->n_comp_units
= cu_list_elements
/ 2;
1822 dwarf2_per_objfile
->all_comp_units
1823 = obstack_alloc (&objfile
->objfile_obstack
,
1824 dwarf2_per_objfile
->n_comp_units
1825 * sizeof (struct dwarf2_per_cu_data
*));
1827 for (i
= 0; i
< cu_list_elements
; i
+= 2)
1829 struct dwarf2_per_cu_data
*the_cu
;
1830 ULONGEST offset
, length
;
1832 if (!extract_cu_value (cu_list
, &offset
)
1833 || !extract_cu_value (cu_list
+ 8, &length
))
1837 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1838 struct dwarf2_per_cu_data
);
1839 the_cu
->offset
= offset
;
1840 the_cu
->length
= length
;
1841 the_cu
->objfile
= objfile
;
1842 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1843 struct dwarf2_per_cu_quick_data
);
1844 dwarf2_per_objfile
->all_comp_units
[i
/ 2] = the_cu
;
1850 /* Create the signatured type hash table from the index. */
1853 create_signatured_type_table_from_index (struct objfile
*objfile
,
1854 const gdb_byte
*bytes
,
1855 offset_type elements
)
1858 htab_t sig_types_hash
;
1860 dwarf2_per_objfile
->n_type_comp_units
= elements
/ 3;
1861 dwarf2_per_objfile
->type_comp_units
1862 = obstack_alloc (&objfile
->objfile_obstack
,
1863 dwarf2_per_objfile
->n_type_comp_units
1864 * sizeof (struct dwarf2_per_cu_data
*));
1866 sig_types_hash
= allocate_signatured_type_table (objfile
);
1868 for (i
= 0; i
< elements
; i
+= 3)
1870 struct signatured_type
*type_sig
;
1871 ULONGEST offset
, type_offset
, signature
;
1874 if (!extract_cu_value (bytes
, &offset
)
1875 || !extract_cu_value (bytes
+ 8, &type_offset
))
1877 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
1880 type_sig
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1881 struct signatured_type
);
1882 type_sig
->signature
= signature
;
1883 type_sig
->offset
= offset
;
1884 type_sig
->type_offset
= type_offset
;
1885 type_sig
->per_cu
.from_debug_types
= 1;
1886 type_sig
->per_cu
.offset
= offset
;
1887 type_sig
->per_cu
.objfile
= objfile
;
1888 type_sig
->per_cu
.v
.quick
1889 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1890 struct dwarf2_per_cu_quick_data
);
1892 slot
= htab_find_slot (sig_types_hash
, type_sig
, INSERT
);
1895 dwarf2_per_objfile
->type_comp_units
[i
/ 3] = &type_sig
->per_cu
;
1898 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
1903 /* Read the address map data from the mapped index, and use it to
1904 populate the objfile's psymtabs_addrmap. */
1907 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
1909 const gdb_byte
*iter
, *end
;
1910 struct obstack temp_obstack
;
1911 struct addrmap
*mutable_map
;
1912 struct cleanup
*cleanup
;
1915 obstack_init (&temp_obstack
);
1916 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
1917 mutable_map
= addrmap_create_mutable (&temp_obstack
);
1919 iter
= index
->address_table
;
1920 end
= iter
+ index
->address_table_size
;
1922 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1926 ULONGEST hi
, lo
, cu_index
;
1927 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1929 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1931 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
1934 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
1935 dw2_get_cu (cu_index
));
1938 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
1939 &objfile
->objfile_obstack
);
1940 do_cleanups (cleanup
);
1943 /* The hash function for strings in the mapped index. This is the
1944 same as the hashtab.c hash function, but we keep a separate copy to
1945 maintain control over the implementation. This is necessary
1946 because the hash function is tied to the format of the mapped index
1950 mapped_index_string_hash (const void *p
)
1952 const unsigned char *str
= (const unsigned char *) p
;
1956 while ((c
= *str
++) != 0)
1957 r
= r
* 67 + c
- 113;
1962 /* Find a slot in the mapped index INDEX for the object named NAME.
1963 If NAME is found, set *VEC_OUT to point to the CU vector in the
1964 constant pool and return 1. If NAME cannot be found, return 0. */
1967 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
1968 offset_type
**vec_out
)
1970 offset_type hash
= mapped_index_string_hash (name
);
1971 offset_type slot
, step
;
1973 slot
= hash
& (index
->symbol_table_slots
- 1);
1974 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
1978 /* Convert a slot number to an offset into the table. */
1979 offset_type i
= 2 * slot
;
1981 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
1984 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
1985 if (!strcmp (name
, str
))
1987 *vec_out
= (offset_type
*) (index
->constant_pool
1988 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
1992 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
1996 /* Read the index file. If everything went ok, initialize the "quick"
1997 elements of all the CUs and return 1. Otherwise, return 0. */
2000 dwarf2_read_index (struct objfile
*objfile
)
2003 struct mapped_index
*map
;
2004 offset_type
*metadata
;
2005 const gdb_byte
*cu_list
;
2006 const gdb_byte
*types_list
= NULL
;
2007 offset_type version
, cu_list_elements
;
2008 offset_type types_list_elements
= 0;
2011 if (dwarf2_per_objfile
->gdb_index
.asection
== NULL
2012 || dwarf2_per_objfile
->gdb_index
.size
== 0)
2015 /* Older elfutils strip versions could keep the section in the main
2016 executable while splitting it for the separate debug info file. */
2017 if ((bfd_get_file_flags (dwarf2_per_objfile
->gdb_index
.asection
)
2018 & SEC_HAS_CONTENTS
) == 0)
2021 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
2023 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
2024 /* Version check. */
2025 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2026 /* Versions earlier than 3 emitted every copy of a psymbol. This
2027 causes the index to behave very poorly for certain requests. So,
2028 it seems better to just ignore such indices. */
2031 /* Indexes with higher version than the one supported by GDB may be no
2032 longer backward compatible. */
2036 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
2037 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
2039 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2042 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2043 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2047 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2048 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2049 - MAYBE_SWAP (metadata
[i
]))
2053 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2054 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2055 - MAYBE_SWAP (metadata
[i
]));
2058 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2059 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2060 - MAYBE_SWAP (metadata
[i
]))
2061 / (2 * sizeof (offset_type
)));
2064 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2066 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
2069 if (types_list_elements
2070 && !create_signatured_type_table_from_index (objfile
, types_list
,
2071 types_list_elements
))
2074 create_addrmap_from_index (objfile
, map
);
2076 dwarf2_per_objfile
->index_table
= map
;
2077 dwarf2_per_objfile
->using_index
= 1;
2078 dwarf2_per_objfile
->quick_file_names_table
=
2079 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2084 /* A helper for the "quick" functions which sets the global
2085 dwarf2_per_objfile according to OBJFILE. */
2088 dw2_setup (struct objfile
*objfile
)
2090 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2091 gdb_assert (dwarf2_per_objfile
);
2094 /* A helper for the "quick" functions which attempts to read the line
2095 table for THIS_CU. */
2097 static struct quick_file_names
*
2098 dw2_get_file_names (struct objfile
*objfile
,
2099 struct dwarf2_per_cu_data
*this_cu
)
2101 bfd
*abfd
= objfile
->obfd
;
2102 struct line_header
*lh
;
2103 struct attribute
*attr
;
2104 struct cleanup
*cleanups
;
2105 struct die_info
*comp_unit_die
;
2106 struct dwarf2_section_info
* sec
;
2107 gdb_byte
*beg_of_comp_unit
, *info_ptr
, *buffer
;
2108 int has_children
, i
;
2109 struct dwarf2_cu cu
;
2110 unsigned int bytes_read
, buffer_size
;
2111 struct die_reader_specs reader_specs
;
2112 char *name
, *comp_dir
;
2114 struct quick_file_names
*qfn
;
2115 unsigned int line_offset
;
2117 if (this_cu
->v
.quick
->file_names
!= NULL
)
2118 return this_cu
->v
.quick
->file_names
;
2119 /* If we know there is no line data, no point in looking again. */
2120 if (this_cu
->v
.quick
->no_file_data
)
2123 init_one_comp_unit (&cu
, objfile
);
2124 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
2126 if (this_cu
->from_debug_types
)
2127 sec
= &dwarf2_per_objfile
->types
;
2129 sec
= &dwarf2_per_objfile
->info
;
2130 dwarf2_read_section (objfile
, sec
);
2131 buffer_size
= sec
->size
;
2132 buffer
= sec
->buffer
;
2133 info_ptr
= buffer
+ this_cu
->offset
;
2134 beg_of_comp_unit
= info_ptr
;
2136 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
2137 buffer
, buffer_size
,
2140 /* Complete the cu_header. */
2141 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
2142 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2145 cu
.per_cu
= this_cu
;
2147 dwarf2_read_abbrevs (abfd
, &cu
);
2148 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
2150 if (this_cu
->from_debug_types
)
2151 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
2152 init_cu_die_reader (&reader_specs
, &cu
);
2153 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2159 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, &cu
);
2162 struct quick_file_names find_entry
;
2164 line_offset
= DW_UNSND (attr
);
2166 /* We may have already read in this line header (TU line header sharing).
2167 If we have we're done. */
2168 find_entry
.offset
= line_offset
;
2169 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2170 &find_entry
, INSERT
);
2173 do_cleanups (cleanups
);
2174 this_cu
->v
.quick
->file_names
= *slot
;
2178 lh
= dwarf_decode_line_header (line_offset
, abfd
, &cu
);
2182 do_cleanups (cleanups
);
2183 this_cu
->v
.quick
->no_file_data
= 1;
2187 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2188 qfn
->offset
= line_offset
;
2189 gdb_assert (slot
!= NULL
);
2192 find_file_and_directory (comp_unit_die
, &cu
, &name
, &comp_dir
);
2194 qfn
->num_file_names
= lh
->num_file_names
;
2195 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2196 lh
->num_file_names
* sizeof (char *));
2197 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2198 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2199 qfn
->real_names
= NULL
;
2201 free_line_header (lh
);
2202 do_cleanups (cleanups
);
2204 this_cu
->v
.quick
->file_names
= qfn
;
2208 /* A helper for the "quick" functions which computes and caches the
2209 real path for a given file name from the line table. */
2212 dw2_get_real_path (struct objfile
*objfile
,
2213 struct quick_file_names
*qfn
, int index
)
2215 if (qfn
->real_names
== NULL
)
2216 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2217 qfn
->num_file_names
, sizeof (char *));
2219 if (qfn
->real_names
[index
] == NULL
)
2220 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2222 return qfn
->real_names
[index
];
2225 static struct symtab
*
2226 dw2_find_last_source_symtab (struct objfile
*objfile
)
2230 dw2_setup (objfile
);
2231 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2232 return dw2_instantiate_symtab (objfile
, dw2_get_cu (index
));
2235 /* Traversal function for dw2_forget_cached_source_info. */
2238 dw2_free_cached_file_names (void **slot
, void *info
)
2240 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2242 if (file_data
->real_names
)
2246 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2248 xfree ((void*) file_data
->real_names
[i
]);
2249 file_data
->real_names
[i
] = NULL
;
2257 dw2_forget_cached_source_info (struct objfile
*objfile
)
2259 dw2_setup (objfile
);
2261 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
2262 dw2_free_cached_file_names
, NULL
);
2266 dw2_lookup_symtab (struct objfile
*objfile
, const char *name
,
2267 const char *full_path
, const char *real_path
,
2268 struct symtab
**result
)
2271 int check_basename
= lbasename (name
) == name
;
2272 struct dwarf2_per_cu_data
*base_cu
= NULL
;
2274 dw2_setup (objfile
);
2276 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2277 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2280 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2281 struct quick_file_names
*file_data
;
2283 if (per_cu
->v
.quick
->symtab
)
2286 file_data
= dw2_get_file_names (objfile
, per_cu
);
2287 if (file_data
== NULL
)
2290 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2292 const char *this_name
= file_data
->file_names
[j
];
2294 if (FILENAME_CMP (name
, this_name
) == 0)
2296 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2300 if (check_basename
&& ! base_cu
2301 && FILENAME_CMP (lbasename (this_name
), name
) == 0)
2304 if (full_path
!= NULL
)
2306 const char *this_real_name
= dw2_get_real_path (objfile
,
2309 if (this_real_name
!= NULL
2310 && FILENAME_CMP (full_path
, this_real_name
) == 0)
2312 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2317 if (real_path
!= NULL
)
2319 const char *this_real_name
= dw2_get_real_path (objfile
,
2322 if (this_real_name
!= NULL
2323 && FILENAME_CMP (real_path
, this_real_name
) == 0)
2325 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2334 *result
= dw2_instantiate_symtab (objfile
, base_cu
);
2341 static struct symtab
*
2342 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2343 const char *name
, domain_enum domain
)
2345 /* We do all the work in the pre_expand_symtabs_matching hook
2350 /* A helper function that expands all symtabs that hold an object
2354 dw2_do_expand_symtabs_matching (struct objfile
*objfile
, const char *name
)
2356 dw2_setup (objfile
);
2358 /* index_table is NULL if OBJF_READNOW. */
2359 if (dwarf2_per_objfile
->index_table
)
2363 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2366 offset_type i
, len
= MAYBE_SWAP (*vec
);
2367 for (i
= 0; i
< len
; ++i
)
2369 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2370 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2372 dw2_instantiate_symtab (objfile
, per_cu
);
2379 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
2380 int kind
, const char *name
,
2383 dw2_do_expand_symtabs_matching (objfile
, name
);
2387 dw2_print_stats (struct objfile
*objfile
)
2391 dw2_setup (objfile
);
2393 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2394 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2396 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2398 if (!per_cu
->v
.quick
->symtab
)
2401 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2405 dw2_dump (struct objfile
*objfile
)
2407 /* Nothing worth printing. */
2411 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2412 struct section_offsets
*delta
)
2414 /* There's nothing to relocate here. */
2418 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2419 const char *func_name
)
2421 dw2_do_expand_symtabs_matching (objfile
, func_name
);
2425 dw2_expand_all_symtabs (struct objfile
*objfile
)
2429 dw2_setup (objfile
);
2431 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2432 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2434 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2436 dw2_instantiate_symtab (objfile
, per_cu
);
2441 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2442 const char *filename
)
2446 dw2_setup (objfile
);
2448 /* We don't need to consider type units here.
2449 This is only called for examining code, e.g. expand_line_sal.
2450 There can be an order of magnitude (or more) more type units
2451 than comp units, and we avoid them if we can. */
2453 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
2456 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2457 struct quick_file_names
*file_data
;
2459 if (per_cu
->v
.quick
->symtab
)
2462 file_data
= dw2_get_file_names (objfile
, per_cu
);
2463 if (file_data
== NULL
)
2466 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2468 const char *this_name
= file_data
->file_names
[j
];
2469 if (FILENAME_CMP (this_name
, filename
) == 0)
2471 dw2_instantiate_symtab (objfile
, per_cu
);
2479 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2481 struct dwarf2_per_cu_data
*per_cu
;
2483 struct quick_file_names
*file_data
;
2485 dw2_setup (objfile
);
2487 /* index_table is NULL if OBJF_READNOW. */
2488 if (!dwarf2_per_objfile
->index_table
)
2491 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2495 /* Note that this just looks at the very first one named NAME -- but
2496 actually we are looking for a function. find_main_filename
2497 should be rewritten so that it doesn't require a custom hook. It
2498 could just use the ordinary symbol tables. */
2499 /* vec[0] is the length, which must always be >0. */
2500 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[1]));
2502 file_data
= dw2_get_file_names (objfile
, per_cu
);
2503 if (file_data
== NULL
)
2506 return file_data
->file_names
[file_data
->num_file_names
- 1];
2510 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
2511 struct objfile
*objfile
, int global
,
2512 int (*callback
) (struct block
*,
2513 struct symbol
*, void *),
2514 void *data
, symbol_compare_ftype
*match
,
2515 symbol_compare_ftype
*ordered_compare
)
2517 /* Currently unimplemented; used for Ada. The function can be called if the
2518 current language is Ada for a non-Ada objfile using GNU index. As Ada
2519 does not look for non-Ada symbols this function should just return. */
2523 dw2_expand_symtabs_matching (struct objfile
*objfile
,
2524 int (*file_matcher
) (const char *, void *),
2525 int (*name_matcher
) (const char *, void *),
2531 struct mapped_index
*index
;
2533 dw2_setup (objfile
);
2535 /* index_table is NULL if OBJF_READNOW. */
2536 if (!dwarf2_per_objfile
->index_table
)
2538 index
= dwarf2_per_objfile
->index_table
;
2540 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2541 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2544 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2545 struct quick_file_names
*file_data
;
2547 per_cu
->v
.quick
->mark
= 0;
2548 if (per_cu
->v
.quick
->symtab
)
2551 file_data
= dw2_get_file_names (objfile
, per_cu
);
2552 if (file_data
== NULL
)
2555 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2557 if (file_matcher (file_data
->file_names
[j
], data
))
2559 per_cu
->v
.quick
->mark
= 1;
2565 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
2567 offset_type idx
= 2 * iter
;
2569 offset_type
*vec
, vec_len
, vec_idx
;
2571 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
2574 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
2576 if (! (*name_matcher
) (name
, data
))
2579 /* The name was matched, now expand corresponding CUs that were
2581 vec
= (offset_type
*) (index
->constant_pool
2582 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
2583 vec_len
= MAYBE_SWAP (vec
[0]);
2584 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
2586 struct dwarf2_per_cu_data
*per_cu
;
2588 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[vec_idx
+ 1]));
2589 if (per_cu
->v
.quick
->mark
)
2590 dw2_instantiate_symtab (objfile
, per_cu
);
2595 static struct symtab
*
2596 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
2597 struct minimal_symbol
*msymbol
,
2599 struct obj_section
*section
,
2602 struct dwarf2_per_cu_data
*data
;
2604 dw2_setup (objfile
);
2606 if (!objfile
->psymtabs_addrmap
)
2609 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
2613 if (warn_if_readin
&& data
->v
.quick
->symtab
)
2614 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2615 paddress (get_objfile_arch (objfile
), pc
));
2617 return dw2_instantiate_symtab (objfile
, data
);
2621 dw2_map_symbol_names (struct objfile
*objfile
,
2622 void (*fun
) (const char *, void *),
2626 struct mapped_index
*index
;
2628 dw2_setup (objfile
);
2630 /* index_table is NULL if OBJF_READNOW. */
2631 if (!dwarf2_per_objfile
->index_table
)
2633 index
= dwarf2_per_objfile
->index_table
;
2635 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
2637 offset_type idx
= 2 * iter
;
2639 offset_type
*vec
, vec_len
, vec_idx
;
2641 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
2644 name
= (index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]));
2646 (*fun
) (name
, data
);
2651 dw2_map_symbol_filenames (struct objfile
*objfile
,
2652 void (*fun
) (const char *, const char *, void *),
2657 dw2_setup (objfile
);
2659 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2660 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2663 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2664 struct quick_file_names
*file_data
;
2666 if (per_cu
->v
.quick
->symtab
)
2669 file_data
= dw2_get_file_names (objfile
, per_cu
);
2670 if (file_data
== NULL
)
2673 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2675 const char *this_real_name
= dw2_get_real_path (objfile
, file_data
,
2677 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
2683 dw2_has_symbols (struct objfile
*objfile
)
2688 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
2691 dw2_find_last_source_symtab
,
2692 dw2_forget_cached_source_info
,
2695 dw2_pre_expand_symtabs_matching
,
2699 dw2_expand_symtabs_for_function
,
2700 dw2_expand_all_symtabs
,
2701 dw2_expand_symtabs_with_filename
,
2702 dw2_find_symbol_file
,
2703 dw2_map_matching_symbols
,
2704 dw2_expand_symtabs_matching
,
2705 dw2_find_pc_sect_symtab
,
2706 dw2_map_symbol_names
,
2707 dw2_map_symbol_filenames
2710 /* Initialize for reading DWARF for this objfile. Return 0 if this
2711 file will use psymtabs, or 1 if using the GNU index. */
2714 dwarf2_initialize_objfile (struct objfile
*objfile
)
2716 /* If we're about to read full symbols, don't bother with the
2717 indices. In this case we also don't care if some other debug
2718 format is making psymtabs, because they are all about to be
2720 if ((objfile
->flags
& OBJF_READNOW
))
2724 dwarf2_per_objfile
->using_index
= 1;
2725 create_all_comp_units (objfile
);
2726 create_debug_types_hash_table (objfile
);
2727 dwarf2_per_objfile
->quick_file_names_table
=
2728 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2730 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2731 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2733 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2735 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2736 struct dwarf2_per_cu_quick_data
);
2739 /* Return 1 so that gdb sees the "quick" functions. However,
2740 these functions will be no-ops because we will have expanded
2745 if (dwarf2_read_index (objfile
))
2748 dwarf2_build_psymtabs (objfile
);
2754 /* Build a partial symbol table. */
2757 dwarf2_build_psymtabs (struct objfile
*objfile
)
2759 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
2761 init_psymbol_list (objfile
, 1024);
2764 dwarf2_build_psymtabs_hard (objfile
);
2767 /* Return TRUE if OFFSET is within CU_HEADER. */
2770 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
2772 unsigned int bottom
= cu_header
->offset
;
2773 unsigned int top
= (cu_header
->offset
2775 + cu_header
->initial_length_size
);
2777 return (offset
>= bottom
&& offset
< top
);
2780 /* Read in the comp unit header information from the debug_info at info_ptr.
2781 NOTE: This leaves members offset, first_die_offset to be filled in
2785 read_comp_unit_head (struct comp_unit_head
*cu_header
,
2786 gdb_byte
*info_ptr
, bfd
*abfd
)
2789 unsigned int bytes_read
;
2791 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
2792 cu_header
->initial_length_size
= bytes_read
;
2793 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
2794 info_ptr
+= bytes_read
;
2795 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
2797 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
2799 info_ptr
+= bytes_read
;
2800 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
2802 signed_addr
= bfd_get_sign_extend_vma (abfd
);
2803 if (signed_addr
< 0)
2804 internal_error (__FILE__
, __LINE__
,
2805 _("read_comp_unit_head: dwarf from non elf file"));
2806 cu_header
->signed_addr_p
= signed_addr
;
2812 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
2813 gdb_byte
*buffer
, unsigned int buffer_size
,
2816 gdb_byte
*beg_of_comp_unit
= info_ptr
;
2818 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
2820 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
2821 error (_("Dwarf Error: wrong version in compilation unit header "
2822 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
2823 bfd_get_filename (abfd
));
2825 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
2826 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2827 "(offset 0x%lx + 6) [in module %s]"),
2828 (long) header
->abbrev_offset
,
2829 (long) (beg_of_comp_unit
- buffer
),
2830 bfd_get_filename (abfd
));
2832 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
2833 > buffer
+ buffer_size
)
2834 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2835 "(offset 0x%lx + 0) [in module %s]"),
2836 (long) header
->length
,
2837 (long) (beg_of_comp_unit
- buffer
),
2838 bfd_get_filename (abfd
));
2843 /* Read in the types comp unit header information from .debug_types entry at
2844 types_ptr. The result is a pointer to one past the end of the header. */
2847 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
2848 ULONGEST
*signature
,
2849 gdb_byte
*types_ptr
, bfd
*abfd
)
2851 gdb_byte
*initial_types_ptr
= types_ptr
;
2853 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
2854 &dwarf2_per_objfile
->types
);
2855 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
2857 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
2859 *signature
= read_8_bytes (abfd
, types_ptr
);
2861 types_ptr
+= cu_header
->offset_size
;
2862 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
2867 /* Allocate a new partial symtab for file named NAME and mark this new
2868 partial symtab as being an include of PST. */
2871 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
2872 struct objfile
*objfile
)
2874 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
2876 subpst
->section_offsets
= pst
->section_offsets
;
2877 subpst
->textlow
= 0;
2878 subpst
->texthigh
= 0;
2880 subpst
->dependencies
= (struct partial_symtab
**)
2881 obstack_alloc (&objfile
->objfile_obstack
,
2882 sizeof (struct partial_symtab
*));
2883 subpst
->dependencies
[0] = pst
;
2884 subpst
->number_of_dependencies
= 1;
2886 subpst
->globals_offset
= 0;
2887 subpst
->n_global_syms
= 0;
2888 subpst
->statics_offset
= 0;
2889 subpst
->n_static_syms
= 0;
2890 subpst
->symtab
= NULL
;
2891 subpst
->read_symtab
= pst
->read_symtab
;
2894 /* No private part is necessary for include psymtabs. This property
2895 can be used to differentiate between such include psymtabs and
2896 the regular ones. */
2897 subpst
->read_symtab_private
= NULL
;
2900 /* Read the Line Number Program data and extract the list of files
2901 included by the source file represented by PST. Build an include
2902 partial symtab for each of these included files. */
2905 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
2906 struct die_info
*die
,
2907 struct partial_symtab
*pst
)
2909 struct objfile
*objfile
= cu
->objfile
;
2910 bfd
*abfd
= objfile
->obfd
;
2911 struct line_header
*lh
= NULL
;
2912 struct attribute
*attr
;
2914 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2917 unsigned int line_offset
= DW_UNSND (attr
);
2919 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2922 return; /* No linetable, so no includes. */
2924 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
2925 dwarf_decode_lines (lh
, pst
->dirname
, abfd
, cu
, pst
);
2927 free_line_header (lh
);
2931 hash_type_signature (const void *item
)
2933 const struct signatured_type
*type_sig
= item
;
2935 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2936 return type_sig
->signature
;
2940 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
2942 const struct signatured_type
*lhs
= item_lhs
;
2943 const struct signatured_type
*rhs
= item_rhs
;
2945 return lhs
->signature
== rhs
->signature
;
2948 /* Allocate a hash table for signatured types. */
2951 allocate_signatured_type_table (struct objfile
*objfile
)
2953 return htab_create_alloc_ex (41,
2954 hash_type_signature
,
2957 &objfile
->objfile_obstack
,
2958 hashtab_obstack_allocate
,
2959 dummy_obstack_deallocate
);
2962 /* A helper function to add a signatured type CU to a list. */
2965 add_signatured_type_cu_to_list (void **slot
, void *datum
)
2967 struct signatured_type
*sigt
= *slot
;
2968 struct dwarf2_per_cu_data
***datap
= datum
;
2970 **datap
= &sigt
->per_cu
;
2976 /* Create the hash table of all entries in the .debug_types section.
2977 The result is zero if there is an error (e.g. missing .debug_types section),
2978 otherwise non-zero. */
2981 create_debug_types_hash_table (struct objfile
*objfile
)
2985 struct dwarf2_per_cu_data
**iter
;
2987 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
2988 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
2990 if (info_ptr
== NULL
)
2992 dwarf2_per_objfile
->signatured_types
= NULL
;
2996 types_htab
= allocate_signatured_type_table (objfile
);
2998 if (dwarf2_die_debug
)
2999 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
3001 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
3002 + dwarf2_per_objfile
->types
.size
)
3004 unsigned int offset
;
3005 unsigned int offset_size
;
3006 unsigned int type_offset
;
3007 unsigned int length
, initial_length_size
;
3008 unsigned short version
;
3010 struct signatured_type
*type_sig
;
3012 gdb_byte
*ptr
= info_ptr
;
3014 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
3016 /* We need to read the type's signature in order to build the hash
3017 table, but we don't need to read anything else just yet. */
3019 /* Sanity check to ensure entire cu is present. */
3020 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
3021 if (ptr
+ length
+ initial_length_size
3022 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
3024 complaint (&symfile_complaints
,
3025 _("debug type entry runs off end "
3026 "of `.debug_types' section, ignored"));
3030 offset_size
= initial_length_size
== 4 ? 4 : 8;
3031 ptr
+= initial_length_size
;
3032 version
= bfd_get_16 (objfile
->obfd
, ptr
);
3034 ptr
+= offset_size
; /* abbrev offset */
3035 ptr
+= 1; /* address size */
3036 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
3038 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
3040 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
3041 memset (type_sig
, 0, sizeof (*type_sig
));
3042 type_sig
->signature
= signature
;
3043 type_sig
->offset
= offset
;
3044 type_sig
->type_offset
= type_offset
;
3045 type_sig
->per_cu
.objfile
= objfile
;
3046 type_sig
->per_cu
.from_debug_types
= 1;
3048 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
3049 gdb_assert (slot
!= NULL
);
3052 if (dwarf2_die_debug
)
3053 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
3054 offset
, phex (signature
, sizeof (signature
)));
3056 info_ptr
= info_ptr
+ initial_length_size
+ length
;
3059 dwarf2_per_objfile
->signatured_types
= types_htab
;
3061 dwarf2_per_objfile
->n_type_comp_units
= htab_elements (types_htab
);
3062 dwarf2_per_objfile
->type_comp_units
3063 = obstack_alloc (&objfile
->objfile_obstack
,
3064 dwarf2_per_objfile
->n_type_comp_units
3065 * sizeof (struct dwarf2_per_cu_data
*));
3066 iter
= &dwarf2_per_objfile
->type_comp_units
[0];
3067 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_list
, &iter
);
3068 gdb_assert (iter
- &dwarf2_per_objfile
->type_comp_units
[0]
3069 == dwarf2_per_objfile
->n_type_comp_units
);
3074 /* Lookup a signature based type.
3075 Returns NULL if SIG is not present in the table. */
3077 static struct signatured_type
*
3078 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
3080 struct signatured_type find_entry
, *entry
;
3082 if (dwarf2_per_objfile
->signatured_types
== NULL
)
3084 complaint (&symfile_complaints
,
3085 _("missing `.debug_types' section for DW_FORM_sig8 die"));
3089 find_entry
.signature
= sig
;
3090 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
3094 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
3097 init_cu_die_reader (struct die_reader_specs
*reader
,
3098 struct dwarf2_cu
*cu
)
3100 reader
->abfd
= cu
->objfile
->obfd
;
3102 if (cu
->per_cu
->from_debug_types
)
3104 gdb_assert (dwarf2_per_objfile
->types
.readin
);
3105 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
3109 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3110 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
3114 /* Find the base address of the compilation unit for range lists and
3115 location lists. It will normally be specified by DW_AT_low_pc.
3116 In DWARF-3 draft 4, the base address could be overridden by
3117 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3118 compilation units with discontinuous ranges. */
3121 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3123 struct attribute
*attr
;
3126 cu
->base_address
= 0;
3128 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3131 cu
->base_address
= DW_ADDR (attr
);
3136 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3139 cu
->base_address
= DW_ADDR (attr
);
3145 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
3146 to combine the common parts.
3147 Process a compilation unit for a psymtab.
3148 BUFFER is a pointer to the beginning of the dwarf section buffer,
3149 either .debug_info or debug_types.
3150 INFO_PTR is a pointer to the start of the CU.
3151 Returns a pointer to the next CU. */
3154 process_psymtab_comp_unit (struct objfile
*objfile
,
3155 struct dwarf2_per_cu_data
*this_cu
,
3156 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
3157 unsigned int buffer_size
)
3159 bfd
*abfd
= objfile
->obfd
;
3160 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3161 struct die_info
*comp_unit_die
;
3162 struct partial_symtab
*pst
;
3164 struct cleanup
*back_to_inner
;
3165 struct dwarf2_cu cu
;
3166 int has_children
, has_pc_info
;
3167 struct attribute
*attr
;
3168 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
3169 struct die_reader_specs reader_specs
;
3171 init_one_comp_unit (&cu
, objfile
);
3172 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
3174 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
3175 buffer
, buffer_size
,
3178 /* Complete the cu_header. */
3179 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
3180 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3182 cu
.list_in_scope
= &file_symbols
;
3184 /* If this compilation unit was already read in, free the
3185 cached copy in order to read it in again. This is
3186 necessary because we skipped some symbols when we first
3187 read in the compilation unit (see load_partial_dies).
3188 This problem could be avoided, but the benefit is
3190 if (this_cu
->cu
!= NULL
)
3191 free_one_cached_comp_unit (this_cu
->cu
);
3193 /* Note that this is a pointer to our stack frame, being
3194 added to a global data structure. It will be cleaned up
3195 in free_stack_comp_unit when we finish with this
3196 compilation unit. */
3198 cu
.per_cu
= this_cu
;
3200 /* Read the abbrevs for this compilation unit into a table. */
3201 dwarf2_read_abbrevs (abfd
, &cu
);
3202 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
3204 /* Read the compilation unit die. */
3205 if (this_cu
->from_debug_types
)
3206 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
3207 init_cu_die_reader (&reader_specs
, &cu
);
3208 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3211 if (this_cu
->from_debug_types
)
3213 /* offset,length haven't been set yet for type units. */
3214 this_cu
->offset
= cu
.header
.offset
;
3215 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
3217 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3219 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3220 + cu
.header
.initial_length_size
);
3221 do_cleanups (back_to_inner
);
3225 prepare_one_comp_unit (&cu
, comp_unit_die
);
3227 /* Allocate a new partial symbol table structure. */
3228 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
3229 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
3230 (attr
!= NULL
) ? DW_STRING (attr
) : "",
3231 /* TEXTLOW and TEXTHIGH are set below. */
3233 objfile
->global_psymbols
.next
,
3234 objfile
->static_psymbols
.next
);
3236 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
3238 pst
->dirname
= DW_STRING (attr
);
3240 pst
->read_symtab_private
= this_cu
;
3242 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3244 /* Store the function that reads in the rest of the symbol table. */
3245 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
3247 this_cu
->v
.psymtab
= pst
;
3249 dwarf2_find_base_address (comp_unit_die
, &cu
);
3251 /* Possibly set the default values of LOWPC and HIGHPC from
3253 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
3254 &best_highpc
, &cu
, pst
);
3255 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
3256 /* Store the contiguous range if it is not empty; it can be empty for
3257 CUs with no code. */
3258 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3259 best_lowpc
+ baseaddr
,
3260 best_highpc
+ baseaddr
- 1, pst
);
3262 /* Check if comp unit has_children.
3263 If so, read the rest of the partial symbols from this comp unit.
3264 If not, there's no more debug_info for this comp unit. */
3267 struct partial_die_info
*first_die
;
3268 CORE_ADDR lowpc
, highpc
;
3270 lowpc
= ((CORE_ADDR
) -1);
3271 highpc
= ((CORE_ADDR
) 0);
3273 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
3275 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
3276 ! has_pc_info
, &cu
);
3278 /* If we didn't find a lowpc, set it to highpc to avoid
3279 complaints from `maint check'. */
3280 if (lowpc
== ((CORE_ADDR
) -1))
3283 /* If the compilation unit didn't have an explicit address range,
3284 then use the information extracted from its child dies. */
3288 best_highpc
= highpc
;
3291 pst
->textlow
= best_lowpc
+ baseaddr
;
3292 pst
->texthigh
= best_highpc
+ baseaddr
;
3294 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
3295 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
3296 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
3297 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
3298 sort_pst_symbols (pst
);
3300 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3301 + cu
.header
.initial_length_size
);
3303 if (this_cu
->from_debug_types
)
3305 /* It's not clear we want to do anything with stmt lists here.
3306 Waiting to see what gcc ultimately does. */
3310 /* Get the list of files included in the current compilation unit,
3311 and build a psymtab for each of them. */
3312 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
3315 do_cleanups (back_to_inner
);
3320 /* Traversal function for htab_traverse_noresize.
3321 Process one .debug_types comp-unit. */
3324 process_type_comp_unit (void **slot
, void *info
)
3326 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
3327 struct objfile
*objfile
= (struct objfile
*) info
;
3328 struct dwarf2_per_cu_data
*this_cu
;
3330 this_cu
= &entry
->per_cu
;
3332 gdb_assert (dwarf2_per_objfile
->types
.readin
);
3333 process_psymtab_comp_unit (objfile
, this_cu
,
3334 dwarf2_per_objfile
->types
.buffer
,
3335 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
3336 dwarf2_per_objfile
->types
.size
);
3341 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3342 Build partial symbol tables for the .debug_types comp-units. */
3345 build_type_psymtabs (struct objfile
*objfile
)
3347 if (! create_debug_types_hash_table (objfile
))
3350 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
3351 process_type_comp_unit
, objfile
);
3354 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3357 psymtabs_addrmap_cleanup (void *o
)
3359 struct objfile
*objfile
= o
;
3361 objfile
->psymtabs_addrmap
= NULL
;
3364 /* Build the partial symbol table by doing a quick pass through the
3365 .debug_info and .debug_abbrev sections. */
3368 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
3371 struct cleanup
*back_to
, *addrmap_cleanup
;
3372 struct obstack temp_obstack
;
3374 dwarf2_per_objfile
->reading_partial_symbols
= 1;
3376 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3377 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3379 /* Any cached compilation units will be linked by the per-objfile
3380 read_in_chain. Make sure to free them when we're done. */
3381 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3383 build_type_psymtabs (objfile
);
3385 create_all_comp_units (objfile
);
3387 /* Create a temporary address map on a temporary obstack. We later
3388 copy this to the final obstack. */
3389 obstack_init (&temp_obstack
);
3390 make_cleanup_obstack_free (&temp_obstack
);
3391 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
3392 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
3394 /* Since the objects we're extracting from .debug_info vary in
3395 length, only the individual functions to extract them (like
3396 read_comp_unit_head and load_partial_die) can really know whether
3397 the buffer is large enough to hold another complete object.
3399 At the moment, they don't actually check that. If .debug_info
3400 holds just one extra byte after the last compilation unit's dies,
3401 then read_comp_unit_head will happily read off the end of the
3402 buffer. read_partial_die is similarly casual. Those functions
3405 For this loop condition, simply checking whether there's any data
3406 left at all should be sufficient. */
3408 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
3409 + dwarf2_per_objfile
->info
.size
))
3411 struct dwarf2_per_cu_data
*this_cu
;
3413 this_cu
= dwarf2_find_comp_unit (info_ptr
3414 - dwarf2_per_objfile
->info
.buffer
,
3417 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
3418 dwarf2_per_objfile
->info
.buffer
,
3420 dwarf2_per_objfile
->info
.size
);
3423 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
3424 &objfile
->objfile_obstack
);
3425 discard_cleanups (addrmap_cleanup
);
3427 do_cleanups (back_to
);
3430 /* Load the partial DIEs for a secondary CU into memory. */
3433 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
3434 struct objfile
*objfile
)
3436 bfd
*abfd
= objfile
->obfd
;
3437 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3438 struct die_info
*comp_unit_die
;
3439 struct dwarf2_cu
*cu
;
3440 struct cleanup
*free_abbrevs_cleanup
, *free_cu_cleanup
= NULL
;
3442 struct die_reader_specs reader_specs
;
3445 gdb_assert (! this_cu
->from_debug_types
);
3447 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3448 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
3449 beg_of_comp_unit
= info_ptr
;
3451 if (this_cu
->cu
== NULL
)
3453 cu
= xmalloc (sizeof (*cu
));
3454 init_one_comp_unit (cu
, objfile
);
3458 /* If an error occurs while loading, release our storage. */
3459 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3461 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
3462 dwarf2_per_objfile
->info
.buffer
,
3463 dwarf2_per_objfile
->info
.size
,
3466 /* Complete the cu_header. */
3467 cu
->header
.offset
= this_cu
->offset
;
3468 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3470 /* Link this compilation unit into the compilation unit tree. */
3472 cu
->per_cu
= this_cu
;
3474 /* Link this CU into read_in_chain. */
3475 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3476 dwarf2_per_objfile
->read_in_chain
= this_cu
;
3481 info_ptr
+= cu
->header
.first_die_offset
;
3484 /* Read the abbrevs for this compilation unit into a table. */
3485 gdb_assert (cu
->dwarf2_abbrevs
== NULL
);
3486 dwarf2_read_abbrevs (abfd
, cu
);
3487 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3489 /* Read the compilation unit die. */
3490 init_cu_die_reader (&reader_specs
, cu
);
3491 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3494 prepare_one_comp_unit (cu
, comp_unit_die
);
3496 /* Check if comp unit has_children.
3497 If so, read the rest of the partial symbols from this comp unit.
3498 If not, there's no more debug_info for this comp unit. */
3500 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
3502 do_cleanups (free_abbrevs_cleanup
);
3506 /* We've successfully allocated this compilation unit. Let our
3507 caller clean it up when finished with it. */
3508 discard_cleanups (free_cu_cleanup
);
3512 /* Create a list of all compilation units in OBJFILE. We do this only
3513 if an inter-comp-unit reference is found; presumably if there is one,
3514 there will be many, and one will occur early in the .debug_info section.
3515 So there's no point in building this list incrementally. */
3518 create_all_comp_units (struct objfile
*objfile
)
3522 struct dwarf2_per_cu_data
**all_comp_units
;
3525 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3526 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3530 all_comp_units
= xmalloc (n_allocated
3531 * sizeof (struct dwarf2_per_cu_data
*));
3533 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
3534 + dwarf2_per_objfile
->info
.size
)
3536 unsigned int length
, initial_length_size
;
3537 struct dwarf2_per_cu_data
*this_cu
;
3538 unsigned int offset
;
3540 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
3542 /* Read just enough information to find out where the next
3543 compilation unit is. */
3544 length
= read_initial_length (objfile
->obfd
, info_ptr
,
3545 &initial_length_size
);
3547 /* Save the compilation unit for later lookup. */
3548 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
3549 sizeof (struct dwarf2_per_cu_data
));
3550 memset (this_cu
, 0, sizeof (*this_cu
));
3551 this_cu
->offset
= offset
;
3552 this_cu
->length
= length
+ initial_length_size
;
3553 this_cu
->objfile
= objfile
;
3555 if (n_comp_units
== n_allocated
)
3558 all_comp_units
= xrealloc (all_comp_units
,
3560 * sizeof (struct dwarf2_per_cu_data
*));
3562 all_comp_units
[n_comp_units
++] = this_cu
;
3564 info_ptr
= info_ptr
+ this_cu
->length
;
3567 dwarf2_per_objfile
->all_comp_units
3568 = obstack_alloc (&objfile
->objfile_obstack
,
3569 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3570 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
3571 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3572 xfree (all_comp_units
);
3573 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
3576 /* Process all loaded DIEs for compilation unit CU, starting at
3577 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3578 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3579 DW_AT_ranges). If NEED_PC is set, then this function will set
3580 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3581 and record the covered ranges in the addrmap. */
3584 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
3585 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3587 struct partial_die_info
*pdi
;
3589 /* Now, march along the PDI's, descending into ones which have
3590 interesting children but skipping the children of the other ones,
3591 until we reach the end of the compilation unit. */
3597 fixup_partial_die (pdi
, cu
);
3599 /* Anonymous namespaces or modules have no name but have interesting
3600 children, so we need to look at them. Ditto for anonymous
3603 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
3604 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
3608 case DW_TAG_subprogram
:
3609 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3611 case DW_TAG_constant
:
3612 case DW_TAG_variable
:
3613 case DW_TAG_typedef
:
3614 case DW_TAG_union_type
:
3615 if (!pdi
->is_declaration
)
3617 add_partial_symbol (pdi
, cu
);
3620 case DW_TAG_class_type
:
3621 case DW_TAG_interface_type
:
3622 case DW_TAG_structure_type
:
3623 if (!pdi
->is_declaration
)
3625 add_partial_symbol (pdi
, cu
);
3628 case DW_TAG_enumeration_type
:
3629 if (!pdi
->is_declaration
)
3630 add_partial_enumeration (pdi
, cu
);
3632 case DW_TAG_base_type
:
3633 case DW_TAG_subrange_type
:
3634 /* File scope base type definitions are added to the partial
3636 add_partial_symbol (pdi
, cu
);
3638 case DW_TAG_namespace
:
3639 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
3642 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
3649 /* If the die has a sibling, skip to the sibling. */
3651 pdi
= pdi
->die_sibling
;
3655 /* Functions used to compute the fully scoped name of a partial DIE.
3657 Normally, this is simple. For C++, the parent DIE's fully scoped
3658 name is concatenated with "::" and the partial DIE's name. For
3659 Java, the same thing occurs except that "." is used instead of "::".
3660 Enumerators are an exception; they use the scope of their parent
3661 enumeration type, i.e. the name of the enumeration type is not
3662 prepended to the enumerator.
3664 There are two complexities. One is DW_AT_specification; in this
3665 case "parent" means the parent of the target of the specification,
3666 instead of the direct parent of the DIE. The other is compilers
3667 which do not emit DW_TAG_namespace; in this case we try to guess
3668 the fully qualified name of structure types from their members'
3669 linkage names. This must be done using the DIE's children rather
3670 than the children of any DW_AT_specification target. We only need
3671 to do this for structures at the top level, i.e. if the target of
3672 any DW_AT_specification (if any; otherwise the DIE itself) does not
3675 /* Compute the scope prefix associated with PDI's parent, in
3676 compilation unit CU. The result will be allocated on CU's
3677 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3678 field. NULL is returned if no prefix is necessary. */
3680 partial_die_parent_scope (struct partial_die_info
*pdi
,
3681 struct dwarf2_cu
*cu
)
3683 char *grandparent_scope
;
3684 struct partial_die_info
*parent
, *real_pdi
;
3686 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3687 then this means the parent of the specification DIE. */
3690 while (real_pdi
->has_specification
)
3691 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3693 parent
= real_pdi
->die_parent
;
3697 if (parent
->scope_set
)
3698 return parent
->scope
;
3700 fixup_partial_die (parent
, cu
);
3702 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
3704 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3705 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3706 Work around this problem here. */
3707 if (cu
->language
== language_cplus
3708 && parent
->tag
== DW_TAG_namespace
3709 && strcmp (parent
->name
, "::") == 0
3710 && grandparent_scope
== NULL
)
3712 parent
->scope
= NULL
;
3713 parent
->scope_set
= 1;
3717 if (parent
->tag
== DW_TAG_namespace
3718 || parent
->tag
== DW_TAG_module
3719 || parent
->tag
== DW_TAG_structure_type
3720 || parent
->tag
== DW_TAG_class_type
3721 || parent
->tag
== DW_TAG_interface_type
3722 || parent
->tag
== DW_TAG_union_type
3723 || parent
->tag
== DW_TAG_enumeration_type
)
3725 if (grandparent_scope
== NULL
)
3726 parent
->scope
= parent
->name
;
3728 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
3730 parent
->name
, 0, cu
);
3732 else if (parent
->tag
== DW_TAG_enumerator
)
3733 /* Enumerators should not get the name of the enumeration as a prefix. */
3734 parent
->scope
= grandparent_scope
;
3737 /* FIXME drow/2004-04-01: What should we be doing with
3738 function-local names? For partial symbols, we should probably be
3740 complaint (&symfile_complaints
,
3741 _("unhandled containing DIE tag %d for DIE at %d"),
3742 parent
->tag
, pdi
->offset
);
3743 parent
->scope
= grandparent_scope
;
3746 parent
->scope_set
= 1;
3747 return parent
->scope
;
3750 /* Return the fully scoped name associated with PDI, from compilation unit
3751 CU. The result will be allocated with malloc. */
3753 partial_die_full_name (struct partial_die_info
*pdi
,
3754 struct dwarf2_cu
*cu
)
3758 /* If this is a template instantiation, we can not work out the
3759 template arguments from partial DIEs. So, unfortunately, we have
3760 to go through the full DIEs. At least any work we do building
3761 types here will be reused if full symbols are loaded later. */
3762 if (pdi
->has_template_arguments
)
3764 fixup_partial_die (pdi
, cu
);
3766 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
3768 struct die_info
*die
;
3769 struct attribute attr
;
3770 struct dwarf2_cu
*ref_cu
= cu
;
3773 attr
.form
= DW_FORM_ref_addr
;
3774 attr
.u
.addr
= pdi
->offset
;
3775 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
3777 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
3781 parent_scope
= partial_die_parent_scope (pdi
, cu
);
3782 if (parent_scope
== NULL
)
3785 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
3789 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
3791 struct objfile
*objfile
= cu
->objfile
;
3793 char *actual_name
= NULL
;
3794 const struct partial_symbol
*psym
= NULL
;
3796 int built_actual_name
= 0;
3798 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3800 actual_name
= partial_die_full_name (pdi
, cu
);
3802 built_actual_name
= 1;
3804 if (actual_name
== NULL
)
3805 actual_name
= pdi
->name
;
3809 case DW_TAG_subprogram
:
3810 if (pdi
->is_external
|| cu
->language
== language_ada
)
3812 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3813 of the global scope. But in Ada, we want to be able to access
3814 nested procedures globally. So all Ada subprograms are stored
3815 in the global scope. */
3816 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3817 mst_text, objfile); */
3818 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3820 VAR_DOMAIN
, LOC_BLOCK
,
3821 &objfile
->global_psymbols
,
3822 0, pdi
->lowpc
+ baseaddr
,
3823 cu
->language
, objfile
);
3827 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3828 mst_file_text, objfile); */
3829 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3831 VAR_DOMAIN
, LOC_BLOCK
,
3832 &objfile
->static_psymbols
,
3833 0, pdi
->lowpc
+ baseaddr
,
3834 cu
->language
, objfile
);
3837 case DW_TAG_constant
:
3839 struct psymbol_allocation_list
*list
;
3841 if (pdi
->is_external
)
3842 list
= &objfile
->global_psymbols
;
3844 list
= &objfile
->static_psymbols
;
3845 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3846 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
3847 list
, 0, 0, cu
->language
, objfile
);
3851 case DW_TAG_variable
:
3853 addr
= decode_locdesc (pdi
->locdesc
, cu
);
3857 && !dwarf2_per_objfile
->has_section_at_zero
)
3859 /* A global or static variable may also have been stripped
3860 out by the linker if unused, in which case its address
3861 will be nullified; do not add such variables into partial
3862 symbol table then. */
3864 else if (pdi
->is_external
)
3867 Don't enter into the minimal symbol tables as there is
3868 a minimal symbol table entry from the ELF symbols already.
3869 Enter into partial symbol table if it has a location
3870 descriptor or a type.
3871 If the location descriptor is missing, new_symbol will create
3872 a LOC_UNRESOLVED symbol, the address of the variable will then
3873 be determined from the minimal symbol table whenever the variable
3875 The address for the partial symbol table entry is not
3876 used by GDB, but it comes in handy for debugging partial symbol
3879 if (pdi
->locdesc
|| pdi
->has_type
)
3880 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3882 VAR_DOMAIN
, LOC_STATIC
,
3883 &objfile
->global_psymbols
,
3885 cu
->language
, objfile
);
3889 /* Static Variable. Skip symbols without location descriptors. */
3890 if (pdi
->locdesc
== NULL
)
3892 if (built_actual_name
)
3893 xfree (actual_name
);
3896 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
3897 mst_file_data, objfile); */
3898 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3900 VAR_DOMAIN
, LOC_STATIC
,
3901 &objfile
->static_psymbols
,
3903 cu
->language
, objfile
);
3906 case DW_TAG_typedef
:
3907 case DW_TAG_base_type
:
3908 case DW_TAG_subrange_type
:
3909 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3911 VAR_DOMAIN
, LOC_TYPEDEF
,
3912 &objfile
->static_psymbols
,
3913 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3915 case DW_TAG_namespace
:
3916 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3918 VAR_DOMAIN
, LOC_TYPEDEF
,
3919 &objfile
->global_psymbols
,
3920 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3922 case DW_TAG_class_type
:
3923 case DW_TAG_interface_type
:
3924 case DW_TAG_structure_type
:
3925 case DW_TAG_union_type
:
3926 case DW_TAG_enumeration_type
:
3927 /* Skip external references. The DWARF standard says in the section
3928 about "Structure, Union, and Class Type Entries": "An incomplete
3929 structure, union or class type is represented by a structure,
3930 union or class entry that does not have a byte size attribute
3931 and that has a DW_AT_declaration attribute." */
3932 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
3934 if (built_actual_name
)
3935 xfree (actual_name
);
3939 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3940 static vs. global. */
3941 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3943 STRUCT_DOMAIN
, LOC_TYPEDEF
,
3944 (cu
->language
== language_cplus
3945 || cu
->language
== language_java
)
3946 ? &objfile
->global_psymbols
3947 : &objfile
->static_psymbols
,
3948 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3951 case DW_TAG_enumerator
:
3952 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3954 VAR_DOMAIN
, LOC_CONST
,
3955 (cu
->language
== language_cplus
3956 || cu
->language
== language_java
)
3957 ? &objfile
->global_psymbols
3958 : &objfile
->static_psymbols
,
3959 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3965 if (built_actual_name
)
3966 xfree (actual_name
);
3969 /* Read a partial die corresponding to a namespace; also, add a symbol
3970 corresponding to that namespace to the symbol table. NAMESPACE is
3971 the name of the enclosing namespace. */
3974 add_partial_namespace (struct partial_die_info
*pdi
,
3975 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3976 int need_pc
, struct dwarf2_cu
*cu
)
3978 /* Add a symbol for the namespace. */
3980 add_partial_symbol (pdi
, cu
);
3982 /* Now scan partial symbols in that namespace. */
3984 if (pdi
->has_children
)
3985 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
3988 /* Read a partial die corresponding to a Fortran module. */
3991 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
3992 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3994 /* Now scan partial symbols in that module. */
3996 if (pdi
->has_children
)
3997 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4000 /* Read a partial die corresponding to a subprogram and create a partial
4001 symbol for that subprogram. When the CU language allows it, this
4002 routine also defines a partial symbol for each nested subprogram
4003 that this subprogram contains.
4005 DIE my also be a lexical block, in which case we simply search
4006 recursively for suprograms defined inside that lexical block.
4007 Again, this is only performed when the CU language allows this
4008 type of definitions. */
4011 add_partial_subprogram (struct partial_die_info
*pdi
,
4012 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4013 int need_pc
, struct dwarf2_cu
*cu
)
4015 if (pdi
->tag
== DW_TAG_subprogram
)
4017 if (pdi
->has_pc_info
)
4019 if (pdi
->lowpc
< *lowpc
)
4020 *lowpc
= pdi
->lowpc
;
4021 if (pdi
->highpc
> *highpc
)
4022 *highpc
= pdi
->highpc
;
4026 struct objfile
*objfile
= cu
->objfile
;
4028 baseaddr
= ANOFFSET (objfile
->section_offsets
,
4029 SECT_OFF_TEXT (objfile
));
4030 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4031 pdi
->lowpc
+ baseaddr
,
4032 pdi
->highpc
- 1 + baseaddr
,
4033 cu
->per_cu
->v
.psymtab
);
4035 if (!pdi
->is_declaration
)
4036 /* Ignore subprogram DIEs that do not have a name, they are
4037 illegal. Do not emit a complaint at this point, we will
4038 do so when we convert this psymtab into a symtab. */
4040 add_partial_symbol (pdi
, cu
);
4044 if (! pdi
->has_children
)
4047 if (cu
->language
== language_ada
)
4049 pdi
= pdi
->die_child
;
4052 fixup_partial_die (pdi
, cu
);
4053 if (pdi
->tag
== DW_TAG_subprogram
4054 || pdi
->tag
== DW_TAG_lexical_block
)
4055 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
4056 pdi
= pdi
->die_sibling
;
4061 /* Read a partial die corresponding to an enumeration type. */
4064 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
4065 struct dwarf2_cu
*cu
)
4067 struct partial_die_info
*pdi
;
4069 if (enum_pdi
->name
!= NULL
)
4070 add_partial_symbol (enum_pdi
, cu
);
4072 pdi
= enum_pdi
->die_child
;
4075 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
4076 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
4078 add_partial_symbol (pdi
, cu
);
4079 pdi
= pdi
->die_sibling
;
4083 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
4084 Return the corresponding abbrev, or NULL if the number is zero (indicating
4085 an empty DIE). In either case *BYTES_READ will be set to the length of
4086 the initial number. */
4088 static struct abbrev_info
*
4089 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
4090 struct dwarf2_cu
*cu
)
4092 bfd
*abfd
= cu
->objfile
->obfd
;
4093 unsigned int abbrev_number
;
4094 struct abbrev_info
*abbrev
;
4096 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
4098 if (abbrev_number
== 0)
4101 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
4104 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
4105 abbrev_number
, bfd_get_filename (abfd
));
4111 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4112 Returns a pointer to the end of a series of DIEs, terminated by an empty
4113 DIE. Any children of the skipped DIEs will also be skipped. */
4116 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
4118 struct abbrev_info
*abbrev
;
4119 unsigned int bytes_read
;
4123 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
4125 return info_ptr
+ bytes_read
;
4127 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
4131 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4132 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4133 abbrev corresponding to that skipped uleb128 should be passed in
4134 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4138 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4139 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
4141 unsigned int bytes_read
;
4142 struct attribute attr
;
4143 bfd
*abfd
= cu
->objfile
->obfd
;
4144 unsigned int form
, i
;
4146 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
4148 /* The only abbrev we care about is DW_AT_sibling. */
4149 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
4151 read_attribute (&attr
, &abbrev
->attrs
[i
],
4152 abfd
, info_ptr
, cu
);
4153 if (attr
.form
== DW_FORM_ref_addr
)
4154 complaint (&symfile_complaints
,
4155 _("ignoring absolute DW_AT_sibling"));
4157 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
4160 /* If it isn't DW_AT_sibling, skip this attribute. */
4161 form
= abbrev
->attrs
[i
].form
;
4165 case DW_FORM_ref_addr
:
4166 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4167 and later it is offset sized. */
4168 if (cu
->header
.version
== 2)
4169 info_ptr
+= cu
->header
.addr_size
;
4171 info_ptr
+= cu
->header
.offset_size
;
4174 info_ptr
+= cu
->header
.addr_size
;
4181 case DW_FORM_flag_present
:
4196 case DW_FORM_string
:
4197 read_direct_string (abfd
, info_ptr
, &bytes_read
);
4198 info_ptr
+= bytes_read
;
4200 case DW_FORM_sec_offset
:
4202 info_ptr
+= cu
->header
.offset_size
;
4204 case DW_FORM_exprloc
:
4206 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4207 info_ptr
+= bytes_read
;
4209 case DW_FORM_block1
:
4210 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
4212 case DW_FORM_block2
:
4213 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
4215 case DW_FORM_block4
:
4216 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
4220 case DW_FORM_ref_udata
:
4221 info_ptr
= skip_leb128 (abfd
, info_ptr
);
4223 case DW_FORM_indirect
:
4224 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4225 info_ptr
+= bytes_read
;
4226 /* We need to continue parsing from here, so just go back to
4228 goto skip_attribute
;
4231 error (_("Dwarf Error: Cannot handle %s "
4232 "in DWARF reader [in module %s]"),
4233 dwarf_form_name (form
),
4234 bfd_get_filename (abfd
));
4238 if (abbrev
->has_children
)
4239 return skip_children (buffer
, info_ptr
, cu
);
4244 /* Locate ORIG_PDI's sibling.
4245 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4249 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
4250 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4251 bfd
*abfd
, struct dwarf2_cu
*cu
)
4253 /* Do we know the sibling already? */
4255 if (orig_pdi
->sibling
)
4256 return orig_pdi
->sibling
;
4258 /* Are there any children to deal with? */
4260 if (!orig_pdi
->has_children
)
4263 /* Skip the children the long way. */
4265 return skip_children (buffer
, info_ptr
, cu
);
4268 /* Expand this partial symbol table into a full symbol table. */
4271 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
4277 warning (_("bug: psymtab for %s is already read in."),
4284 printf_filtered (_("Reading in symbols for %s..."),
4286 gdb_flush (gdb_stdout
);
4289 /* Restore our global data. */
4290 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
4291 dwarf2_objfile_data_key
);
4293 /* If this psymtab is constructed from a debug-only objfile, the
4294 has_section_at_zero flag will not necessarily be correct. We
4295 can get the correct value for this flag by looking at the data
4296 associated with the (presumably stripped) associated objfile. */
4297 if (pst
->objfile
->separate_debug_objfile_backlink
)
4299 struct dwarf2_per_objfile
*dpo_backlink
4300 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
4301 dwarf2_objfile_data_key
);
4303 dwarf2_per_objfile
->has_section_at_zero
4304 = dpo_backlink
->has_section_at_zero
;
4307 dwarf2_per_objfile
->reading_partial_symbols
= 0;
4309 psymtab_to_symtab_1 (pst
);
4311 /* Finish up the debug error message. */
4313 printf_filtered (_("done.\n"));
4318 /* Add PER_CU to the queue. */
4321 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4323 struct dwarf2_queue_item
*item
;
4326 item
= xmalloc (sizeof (*item
));
4327 item
->per_cu
= per_cu
;
4330 if (dwarf2_queue
== NULL
)
4331 dwarf2_queue
= item
;
4333 dwarf2_queue_tail
->next
= item
;
4335 dwarf2_queue_tail
= item
;
4338 /* Process the queue. */
4341 process_queue (struct objfile
*objfile
)
4343 struct dwarf2_queue_item
*item
, *next_item
;
4345 /* The queue starts out with one item, but following a DIE reference
4346 may load a new CU, adding it to the end of the queue. */
4347 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
4349 if (dwarf2_per_objfile
->using_index
4350 ? !item
->per_cu
->v
.quick
->symtab
4351 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
4352 process_full_comp_unit (item
->per_cu
);
4354 item
->per_cu
->queued
= 0;
4355 next_item
= item
->next
;
4359 dwarf2_queue_tail
= NULL
;
4362 /* Free all allocated queue entries. This function only releases anything if
4363 an error was thrown; if the queue was processed then it would have been
4364 freed as we went along. */
4367 dwarf2_release_queue (void *dummy
)
4369 struct dwarf2_queue_item
*item
, *last
;
4371 item
= dwarf2_queue
;
4374 /* Anything still marked queued is likely to be in an
4375 inconsistent state, so discard it. */
4376 if (item
->per_cu
->queued
)
4378 if (item
->per_cu
->cu
!= NULL
)
4379 free_one_cached_comp_unit (item
->per_cu
->cu
);
4380 item
->per_cu
->queued
= 0;
4388 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
4391 /* Read in full symbols for PST, and anything it depends on. */
4394 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
4396 struct dwarf2_per_cu_data
*per_cu
;
4397 struct cleanup
*back_to
;
4400 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
4401 if (!pst
->dependencies
[i
]->readin
)
4403 /* Inform about additional files that need to be read in. */
4406 /* FIXME: i18n: Need to make this a single string. */
4407 fputs_filtered (" ", gdb_stdout
);
4409 fputs_filtered ("and ", gdb_stdout
);
4411 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
4412 wrap_here (""); /* Flush output. */
4413 gdb_flush (gdb_stdout
);
4415 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
4418 per_cu
= pst
->read_symtab_private
;
4422 /* It's an include file, no symbols to read for it.
4423 Everything is in the parent symtab. */
4428 dw2_do_instantiate_symtab (pst
->objfile
, per_cu
);
4431 /* Load the DIEs associated with PER_CU into memory. */
4434 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
4435 struct objfile
*objfile
)
4437 bfd
*abfd
= objfile
->obfd
;
4438 struct dwarf2_cu
*cu
;
4439 unsigned int offset
;
4440 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
4441 struct cleanup
*free_abbrevs_cleanup
= NULL
, *free_cu_cleanup
= NULL
;
4442 struct attribute
*attr
;
4445 gdb_assert (! per_cu
->from_debug_types
);
4447 /* Set local variables from the partial symbol table info. */
4448 offset
= per_cu
->offset
;
4450 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4451 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
4452 beg_of_comp_unit
= info_ptr
;
4454 if (per_cu
->cu
== NULL
)
4456 cu
= xmalloc (sizeof (*cu
));
4457 init_one_comp_unit (cu
, objfile
);
4461 /* If an error occurs while loading, release our storage. */
4462 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
4464 /* Read in the comp_unit header. */
4465 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
4467 /* Complete the cu_header. */
4468 cu
->header
.offset
= offset
;
4469 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
4471 /* Read the abbrevs for this compilation unit. */
4472 dwarf2_read_abbrevs (abfd
, cu
);
4473 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
4475 /* Link this compilation unit into the compilation unit tree. */
4477 cu
->per_cu
= per_cu
;
4479 /* Link this CU into read_in_chain. */
4480 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4481 dwarf2_per_objfile
->read_in_chain
= per_cu
;
4486 info_ptr
+= cu
->header
.first_die_offset
;
4489 cu
->dies
= read_comp_unit (info_ptr
, cu
);
4491 /* We try not to read any attributes in this function, because not
4492 all objfiles needed for references have been loaded yet, and symbol
4493 table processing isn't initialized. But we have to set the CU language,
4494 or we won't be able to build types correctly. */
4495 prepare_one_comp_unit (cu
, cu
->dies
);
4497 /* Similarly, if we do not read the producer, we can not apply
4498 producer-specific interpretation. */
4499 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
4501 cu
->producer
= DW_STRING (attr
);
4505 do_cleanups (free_abbrevs_cleanup
);
4507 /* We've successfully allocated this compilation unit. Let our
4508 caller clean it up when finished with it. */
4509 discard_cleanups (free_cu_cleanup
);
4513 /* Add a DIE to the delayed physname list. */
4516 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
4517 const char *name
, struct die_info
*die
,
4518 struct dwarf2_cu
*cu
)
4520 struct delayed_method_info mi
;
4522 mi
.fnfield_index
= fnfield_index
;
4526 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
4529 /* A cleanup for freeing the delayed method list. */
4532 free_delayed_list (void *ptr
)
4534 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
4535 if (cu
->method_list
!= NULL
)
4537 VEC_free (delayed_method_info
, cu
->method_list
);
4538 cu
->method_list
= NULL
;
4542 /* Compute the physnames of any methods on the CU's method list.
4544 The computation of method physnames is delayed in order to avoid the
4545 (bad) condition that one of the method's formal parameters is of an as yet
4549 compute_delayed_physnames (struct dwarf2_cu
*cu
)
4552 struct delayed_method_info
*mi
;
4553 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
4556 struct fn_fieldlist
*fn_flp
4557 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
4558 physname
= (char *) dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
4559 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
4563 /* Generate full symbol information for PST and CU, whose DIEs have
4564 already been loaded into memory. */
4567 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4569 struct dwarf2_cu
*cu
= per_cu
->cu
;
4570 struct objfile
*objfile
= per_cu
->objfile
;
4571 CORE_ADDR lowpc
, highpc
;
4572 struct symtab
*symtab
;
4573 struct cleanup
*back_to
, *delayed_list_cleanup
;
4576 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4579 back_to
= make_cleanup (really_free_pendings
, NULL
);
4580 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
4582 cu
->list_in_scope
= &file_symbols
;
4584 dwarf2_find_base_address (cu
->dies
, cu
);
4586 /* Do line number decoding in read_file_scope () */
4587 process_die (cu
->dies
, cu
);
4589 /* Now that we have processed all the DIEs in the CU, all the types
4590 should be complete, and it should now be safe to compute all of the
4592 compute_delayed_physnames (cu
);
4593 do_cleanups (delayed_list_cleanup
);
4595 /* Some compilers don't define a DW_AT_high_pc attribute for the
4596 compilation unit. If the DW_AT_high_pc is missing, synthesize
4597 it, by scanning the DIE's below the compilation unit. */
4598 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
4600 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
4602 /* Set symtab language to language from DW_AT_language.
4603 If the compilation is from a C file generated by language preprocessors,
4604 do not set the language if it was already deduced by start_subfile. */
4606 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
4608 symtab
->language
= cu
->language
;
4611 if (dwarf2_per_objfile
->using_index
)
4612 per_cu
->v
.quick
->symtab
= symtab
;
4615 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4616 pst
->symtab
= symtab
;
4620 do_cleanups (back_to
);
4623 /* Process a die and its children. */
4626 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
4630 case DW_TAG_padding
:
4632 case DW_TAG_compile_unit
:
4633 read_file_scope (die
, cu
);
4635 case DW_TAG_type_unit
:
4636 read_type_unit_scope (die
, cu
);
4638 case DW_TAG_subprogram
:
4639 case DW_TAG_inlined_subroutine
:
4640 read_func_scope (die
, cu
);
4642 case DW_TAG_lexical_block
:
4643 case DW_TAG_try_block
:
4644 case DW_TAG_catch_block
:
4645 read_lexical_block_scope (die
, cu
);
4647 case DW_TAG_class_type
:
4648 case DW_TAG_interface_type
:
4649 case DW_TAG_structure_type
:
4650 case DW_TAG_union_type
:
4651 process_structure_scope (die
, cu
);
4653 case DW_TAG_enumeration_type
:
4654 process_enumeration_scope (die
, cu
);
4657 /* These dies have a type, but processing them does not create
4658 a symbol or recurse to process the children. Therefore we can
4659 read them on-demand through read_type_die. */
4660 case DW_TAG_subroutine_type
:
4661 case DW_TAG_set_type
:
4662 case DW_TAG_array_type
:
4663 case DW_TAG_pointer_type
:
4664 case DW_TAG_ptr_to_member_type
:
4665 case DW_TAG_reference_type
:
4666 case DW_TAG_string_type
:
4669 case DW_TAG_base_type
:
4670 case DW_TAG_subrange_type
:
4671 case DW_TAG_typedef
:
4672 /* Add a typedef symbol for the type definition, if it has a
4674 new_symbol (die
, read_type_die (die
, cu
), cu
);
4676 case DW_TAG_common_block
:
4677 read_common_block (die
, cu
);
4679 case DW_TAG_common_inclusion
:
4681 case DW_TAG_namespace
:
4682 processing_has_namespace_info
= 1;
4683 read_namespace (die
, cu
);
4686 processing_has_namespace_info
= 1;
4687 read_module (die
, cu
);
4689 case DW_TAG_imported_declaration
:
4690 case DW_TAG_imported_module
:
4691 processing_has_namespace_info
= 1;
4692 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
4693 || cu
->language
!= language_fortran
))
4694 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
4695 dwarf_tag_name (die
->tag
));
4696 read_import_statement (die
, cu
);
4699 new_symbol (die
, NULL
, cu
);
4704 /* A helper function for dwarf2_compute_name which determines whether DIE
4705 needs to have the name of the scope prepended to the name listed in the
4709 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4711 struct attribute
*attr
;
4715 case DW_TAG_namespace
:
4716 case DW_TAG_typedef
:
4717 case DW_TAG_class_type
:
4718 case DW_TAG_interface_type
:
4719 case DW_TAG_structure_type
:
4720 case DW_TAG_union_type
:
4721 case DW_TAG_enumeration_type
:
4722 case DW_TAG_enumerator
:
4723 case DW_TAG_subprogram
:
4727 case DW_TAG_variable
:
4728 case DW_TAG_constant
:
4729 /* We only need to prefix "globally" visible variables. These include
4730 any variable marked with DW_AT_external or any variable that
4731 lives in a namespace. [Variables in anonymous namespaces
4732 require prefixing, but they are not DW_AT_external.] */
4734 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
4736 struct dwarf2_cu
*spec_cu
= cu
;
4738 return die_needs_namespace (die_specification (die
, &spec_cu
),
4742 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
4743 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
4744 && die
->parent
->tag
!= DW_TAG_module
)
4746 /* A variable in a lexical block of some kind does not need a
4747 namespace, even though in C++ such variables may be external
4748 and have a mangled name. */
4749 if (die
->parent
->tag
== DW_TAG_lexical_block
4750 || die
->parent
->tag
== DW_TAG_try_block
4751 || die
->parent
->tag
== DW_TAG_catch_block
4752 || die
->parent
->tag
== DW_TAG_subprogram
)
4761 /* Retrieve the last character from a mem_file. */
4764 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
4766 char *last_char_p
= (char *) object
;
4769 *last_char_p
= buffer
[length
- 1];
4772 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4773 compute the physname for the object, which include a method's
4774 formal parameters (C++/Java) and return type (Java).
4776 For Ada, return the DIE's linkage name rather than the fully qualified
4777 name. PHYSNAME is ignored..
4779 The result is allocated on the objfile_obstack and canonicalized. */
4782 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
4786 name
= dwarf2_name (die
, cu
);
4788 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4789 compute it by typename_concat inside GDB. */
4790 if (cu
->language
== language_ada
4791 || (cu
->language
== language_fortran
&& physname
))
4793 /* For Ada unit, we prefer the linkage name over the name, as
4794 the former contains the exported name, which the user expects
4795 to be able to reference. Ideally, we want the user to be able
4796 to reference this entity using either natural or linkage name,
4797 but we haven't started looking at this enhancement yet. */
4798 struct attribute
*attr
;
4800 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
4802 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
4803 if (attr
&& DW_STRING (attr
))
4804 return DW_STRING (attr
);
4807 /* These are the only languages we know how to qualify names in. */
4809 && (cu
->language
== language_cplus
|| cu
->language
== language_java
4810 || cu
->language
== language_fortran
))
4812 if (die_needs_namespace (die
, cu
))
4816 struct ui_file
*buf
;
4818 prefix
= determine_prefix (die
, cu
);
4819 buf
= mem_fileopen ();
4820 if (*prefix
!= '\0')
4822 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
4825 fputs_unfiltered (prefixed_name
, buf
);
4826 xfree (prefixed_name
);
4829 fputs_unfiltered (name
? name
: "", buf
);
4831 /* Template parameters may be specified in the DIE's DW_AT_name, or
4832 as children with DW_TAG_template_type_param or
4833 DW_TAG_value_type_param. If the latter, add them to the name
4834 here. If the name already has template parameters, then
4835 skip this step; some versions of GCC emit both, and
4836 it is more efficient to use the pre-computed name.
4838 Something to keep in mind about this process: it is very
4839 unlikely, or in some cases downright impossible, to produce
4840 something that will match the mangled name of a function.
4841 If the definition of the function has the same debug info,
4842 we should be able to match up with it anyway. But fallbacks
4843 using the minimal symbol, for instance to find a method
4844 implemented in a stripped copy of libstdc++, will not work.
4845 If we do not have debug info for the definition, we will have to
4846 match them up some other way.
4848 When we do name matching there is a related problem with function
4849 templates; two instantiated function templates are allowed to
4850 differ only by their return types, which we do not add here. */
4852 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
4854 struct attribute
*attr
;
4855 struct die_info
*child
;
4858 die
->building_fullname
= 1;
4860 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
4865 struct dwarf2_locexpr_baton
*baton
;
4868 if (child
->tag
!= DW_TAG_template_type_param
4869 && child
->tag
!= DW_TAG_template_value_param
)
4874 fputs_unfiltered ("<", buf
);
4878 fputs_unfiltered (", ", buf
);
4880 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
4883 complaint (&symfile_complaints
,
4884 _("template parameter missing DW_AT_type"));
4885 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
4888 type
= die_type (child
, cu
);
4890 if (child
->tag
== DW_TAG_template_type_param
)
4892 c_print_type (type
, "", buf
, -1, 0);
4896 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
4899 complaint (&symfile_complaints
,
4900 _("template parameter missing "
4901 "DW_AT_const_value"));
4902 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
4906 dwarf2_const_value_attr (attr
, type
, name
,
4907 &cu
->comp_unit_obstack
, cu
,
4908 &value
, &bytes
, &baton
);
4910 if (TYPE_NOSIGN (type
))
4911 /* GDB prints characters as NUMBER 'CHAR'. If that's
4912 changed, this can use value_print instead. */
4913 c_printchar (value
, type
, buf
);
4916 struct value_print_options opts
;
4919 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
4923 else if (bytes
!= NULL
)
4925 v
= allocate_value (type
);
4926 memcpy (value_contents_writeable (v
), bytes
,
4927 TYPE_LENGTH (type
));
4930 v
= value_from_longest (type
, value
);
4932 /* Specify decimal so that we do not depend on
4934 get_formatted_print_options (&opts
, 'd');
4936 value_print (v
, buf
, &opts
);
4942 die
->building_fullname
= 0;
4946 /* Close the argument list, with a space if necessary
4947 (nested templates). */
4948 char last_char
= '\0';
4949 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
4950 if (last_char
== '>')
4951 fputs_unfiltered (" >", buf
);
4953 fputs_unfiltered (">", buf
);
4957 /* For Java and C++ methods, append formal parameter type
4958 information, if PHYSNAME. */
4960 if (physname
&& die
->tag
== DW_TAG_subprogram
4961 && (cu
->language
== language_cplus
4962 || cu
->language
== language_java
))
4964 struct type
*type
= read_type_die (die
, cu
);
4966 c_type_print_args (type
, buf
, 0, cu
->language
);
4968 if (cu
->language
== language_java
)
4970 /* For java, we must append the return type to method
4972 if (die
->tag
== DW_TAG_subprogram
)
4973 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
4976 else if (cu
->language
== language_cplus
)
4978 /* Assume that an artificial first parameter is
4979 "this", but do not crash if it is not. RealView
4980 marks unnamed (and thus unused) parameters as
4981 artificial; there is no way to differentiate
4983 if (TYPE_NFIELDS (type
) > 0
4984 && TYPE_FIELD_ARTIFICIAL (type
, 0)
4985 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
4986 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
4988 fputs_unfiltered (" const", buf
);
4992 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
4994 ui_file_delete (buf
);
4996 if (cu
->language
== language_cplus
)
4999 = dwarf2_canonicalize_name (name
, cu
,
5000 &cu
->objfile
->objfile_obstack
);
5011 /* Return the fully qualified name of DIE, based on its DW_AT_name.
5012 If scope qualifiers are appropriate they will be added. The result
5013 will be allocated on the objfile_obstack, or NULL if the DIE does
5014 not have a name. NAME may either be from a previous call to
5015 dwarf2_name or NULL.
5017 The output string will be canonicalized (if C++/Java). */
5020 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
5022 return dwarf2_compute_name (name
, die
, cu
, 0);
5025 /* Construct a physname for the given DIE in CU. NAME may either be
5026 from a previous call to dwarf2_name or NULL. The result will be
5027 allocated on the objfile_objstack or NULL if the DIE does not have a
5030 The output string will be canonicalized (if C++/Java). */
5033 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
5035 return dwarf2_compute_name (name
, die
, cu
, 1);
5038 /* Read the import statement specified by the given die and record it. */
5041 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
5043 struct attribute
*import_attr
;
5044 struct die_info
*imported_die
;
5045 struct dwarf2_cu
*imported_cu
;
5046 const char *imported_name
;
5047 const char *imported_name_prefix
;
5048 const char *canonical_name
;
5049 const char *import_alias
;
5050 const char *imported_declaration
= NULL
;
5051 const char *import_prefix
;
5055 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
5056 if (import_attr
== NULL
)
5058 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
5059 dwarf_tag_name (die
->tag
));
5064 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
5065 imported_name
= dwarf2_name (imported_die
, imported_cu
);
5066 if (imported_name
== NULL
)
5068 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
5070 The import in the following code:
5084 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
5085 <52> DW_AT_decl_file : 1
5086 <53> DW_AT_decl_line : 6
5087 <54> DW_AT_import : <0x75>
5088 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
5090 <5b> DW_AT_decl_file : 1
5091 <5c> DW_AT_decl_line : 2
5092 <5d> DW_AT_type : <0x6e>
5094 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
5095 <76> DW_AT_byte_size : 4
5096 <77> DW_AT_encoding : 5 (signed)
5098 imports the wrong die ( 0x75 instead of 0x58 ).
5099 This case will be ignored until the gcc bug is fixed. */
5103 /* Figure out the local name after import. */
5104 import_alias
= dwarf2_name (die
, cu
);
5106 /* Figure out where the statement is being imported to. */
5107 import_prefix
= determine_prefix (die
, cu
);
5109 /* Figure out what the scope of the imported die is and prepend it
5110 to the name of the imported die. */
5111 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
5113 if (imported_die
->tag
!= DW_TAG_namespace
5114 && imported_die
->tag
!= DW_TAG_module
)
5116 imported_declaration
= imported_name
;
5117 canonical_name
= imported_name_prefix
;
5119 else if (strlen (imported_name_prefix
) > 0)
5121 temp
= alloca (strlen (imported_name_prefix
)
5122 + 2 + strlen (imported_name
) + 1);
5123 strcpy (temp
, imported_name_prefix
);
5124 strcat (temp
, "::");
5125 strcat (temp
, imported_name
);
5126 canonical_name
= temp
;
5129 canonical_name
= imported_name
;
5131 cp_add_using_directive (import_prefix
,
5134 imported_declaration
,
5135 &cu
->objfile
->objfile_obstack
);
5139 initialize_cu_func_list (struct dwarf2_cu
*cu
)
5141 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
5144 /* Cleanup function for read_file_scope. */
5147 free_cu_line_header (void *arg
)
5149 struct dwarf2_cu
*cu
= arg
;
5151 free_line_header (cu
->line_header
);
5152 cu
->line_header
= NULL
;
5156 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
5157 char **name
, char **comp_dir
)
5159 struct attribute
*attr
;
5164 /* Find the filename. Do not use dwarf2_name here, since the filename
5165 is not a source language identifier. */
5166 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5169 *name
= DW_STRING (attr
);
5172 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5174 *comp_dir
= DW_STRING (attr
);
5175 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
5177 *comp_dir
= ldirname (*name
);
5178 if (*comp_dir
!= NULL
)
5179 make_cleanup (xfree
, *comp_dir
);
5181 if (*comp_dir
!= NULL
)
5183 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5184 directory, get rid of it. */
5185 char *cp
= strchr (*comp_dir
, ':');
5187 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
5192 *name
= "<unknown>";
5195 /* Process DW_TAG_compile_unit. */
5198 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5200 struct objfile
*objfile
= cu
->objfile
;
5201 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5202 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
5203 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
5204 struct attribute
*attr
;
5206 char *comp_dir
= NULL
;
5207 struct die_info
*child_die
;
5208 bfd
*abfd
= objfile
->obfd
;
5209 struct line_header
*line_header
= 0;
5212 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5214 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
5216 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5217 from finish_block. */
5218 if (lowpc
== ((CORE_ADDR
) -1))
5223 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
5225 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5228 set_cu_language (DW_UNSND (attr
), cu
);
5231 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5233 cu
->producer
= DW_STRING (attr
);
5235 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
5236 standardised yet. As a workaround for the language detection we fall
5237 back to the DW_AT_producer string. */
5238 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
5239 cu
->language
= language_opencl
;
5241 /* We assume that we're processing GCC output. */
5242 processing_gcc_compilation
= 2;
5244 processing_has_namespace_info
= 0;
5246 start_symtab (name
, comp_dir
, lowpc
);
5247 record_debugformat ("DWARF 2");
5248 record_producer (cu
->producer
);
5250 initialize_cu_func_list (cu
);
5252 /* Decode line number information if present. We do this before
5253 processing child DIEs, so that the line header table is available
5254 for DW_AT_decl_file. */
5255 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5258 unsigned int line_offset
= DW_UNSND (attr
);
5259 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
5262 cu
->line_header
= line_header
;
5263 make_cleanup (free_cu_line_header
, cu
);
5264 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
5268 /* Process all dies in compilation unit. */
5269 if (die
->child
!= NULL
)
5271 child_die
= die
->child
;
5272 while (child_die
&& child_die
->tag
)
5274 process_die (child_die
, cu
);
5275 child_die
= sibling_die (child_die
);
5279 /* Decode macro information, if present. Dwarf 2 macro information
5280 refers to information in the line number info statement program
5281 header, so we can only read it if we've read the header
5283 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
5284 if (attr
&& line_header
)
5286 unsigned int macro_offset
= DW_UNSND (attr
);
5288 dwarf_decode_macros (line_header
, macro_offset
,
5289 comp_dir
, abfd
, cu
);
5291 do_cleanups (back_to
);
5294 /* Process DW_TAG_type_unit.
5295 For TUs we want to skip the first top level sibling if it's not the
5296 actual type being defined by this TU. In this case the first top
5297 level sibling is there to provide context only. */
5300 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5302 struct objfile
*objfile
= cu
->objfile
;
5303 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5305 struct attribute
*attr
;
5307 char *comp_dir
= NULL
;
5308 struct die_info
*child_die
;
5309 bfd
*abfd
= objfile
->obfd
;
5311 /* start_symtab needs a low pc, but we don't really have one.
5312 Do what read_file_scope would do in the absence of such info. */
5313 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5315 /* Find the filename. Do not use dwarf2_name here, since the filename
5316 is not a source language identifier. */
5317 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5319 name
= DW_STRING (attr
);
5321 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5323 comp_dir
= DW_STRING (attr
);
5324 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
5326 comp_dir
= ldirname (name
);
5327 if (comp_dir
!= NULL
)
5328 make_cleanup (xfree
, comp_dir
);
5334 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5336 set_cu_language (DW_UNSND (attr
), cu
);
5338 /* This isn't technically needed today. It is done for symmetry
5339 with read_file_scope. */
5340 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5342 cu
->producer
= DW_STRING (attr
);
5344 /* We assume that we're processing GCC output. */
5345 processing_gcc_compilation
= 2;
5347 processing_has_namespace_info
= 0;
5349 start_symtab (name
, comp_dir
, lowpc
);
5350 record_debugformat ("DWARF 2");
5351 record_producer (cu
->producer
);
5353 /* Process the dies in the type unit. */
5354 if (die
->child
== NULL
)
5356 dump_die_for_error (die
);
5357 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5358 bfd_get_filename (abfd
));
5361 child_die
= die
->child
;
5363 while (child_die
&& child_die
->tag
)
5365 process_die (child_die
, cu
);
5367 child_die
= sibling_die (child_die
);
5370 do_cleanups (back_to
);
5374 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
5375 struct dwarf2_cu
*cu
)
5377 struct function_range
*thisfn
;
5379 thisfn
= (struct function_range
*)
5380 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
5381 thisfn
->name
= name
;
5382 thisfn
->lowpc
= lowpc
;
5383 thisfn
->highpc
= highpc
;
5384 thisfn
->seen_line
= 0;
5385 thisfn
->next
= NULL
;
5387 if (cu
->last_fn
== NULL
)
5388 cu
->first_fn
= thisfn
;
5390 cu
->last_fn
->next
= thisfn
;
5392 cu
->last_fn
= thisfn
;
5395 /* qsort helper for inherit_abstract_dies. */
5398 unsigned_int_compar (const void *ap
, const void *bp
)
5400 unsigned int a
= *(unsigned int *) ap
;
5401 unsigned int b
= *(unsigned int *) bp
;
5403 return (a
> b
) - (b
> a
);
5406 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5407 Inherit only the children of the DW_AT_abstract_origin DIE not being
5408 already referenced by DW_AT_abstract_origin from the children of the
5412 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
5414 struct die_info
*child_die
;
5415 unsigned die_children_count
;
5416 /* CU offsets which were referenced by children of the current DIE. */
5418 unsigned *offsets_end
, *offsetp
;
5419 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5420 struct die_info
*origin_die
;
5421 /* Iterator of the ORIGIN_DIE children. */
5422 struct die_info
*origin_child_die
;
5423 struct cleanup
*cleanups
;
5424 struct attribute
*attr
;
5425 struct dwarf2_cu
*origin_cu
;
5426 struct pending
**origin_previous_list_in_scope
;
5428 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
5432 /* Note that following die references may follow to a die in a
5436 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
5438 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5440 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
5441 origin_cu
->list_in_scope
= cu
->list_in_scope
;
5443 if (die
->tag
!= origin_die
->tag
5444 && !(die
->tag
== DW_TAG_inlined_subroutine
5445 && origin_die
->tag
== DW_TAG_subprogram
))
5446 complaint (&symfile_complaints
,
5447 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5448 die
->offset
, origin_die
->offset
);
5450 child_die
= die
->child
;
5451 die_children_count
= 0;
5452 while (child_die
&& child_die
->tag
)
5454 child_die
= sibling_die (child_die
);
5455 die_children_count
++;
5457 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
5458 cleanups
= make_cleanup (xfree
, offsets
);
5460 offsets_end
= offsets
;
5461 child_die
= die
->child
;
5462 while (child_die
&& child_die
->tag
)
5464 /* For each CHILD_DIE, find the corresponding child of
5465 ORIGIN_DIE. If there is more than one layer of
5466 DW_AT_abstract_origin, follow them all; there shouldn't be,
5467 but GCC versions at least through 4.4 generate this (GCC PR
5469 struct die_info
*child_origin_die
= child_die
;
5470 struct dwarf2_cu
*child_origin_cu
= cu
;
5474 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
5478 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
5482 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5483 counterpart may exist. */
5484 if (child_origin_die
!= child_die
)
5486 if (child_die
->tag
!= child_origin_die
->tag
5487 && !(child_die
->tag
== DW_TAG_inlined_subroutine
5488 && child_origin_die
->tag
== DW_TAG_subprogram
))
5489 complaint (&symfile_complaints
,
5490 _("Child DIE 0x%x and its abstract origin 0x%x have "
5491 "different tags"), child_die
->offset
,
5492 child_origin_die
->offset
);
5493 if (child_origin_die
->parent
!= origin_die
)
5494 complaint (&symfile_complaints
,
5495 _("Child DIE 0x%x and its abstract origin 0x%x have "
5496 "different parents"), child_die
->offset
,
5497 child_origin_die
->offset
);
5499 *offsets_end
++ = child_origin_die
->offset
;
5501 child_die
= sibling_die (child_die
);
5503 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
5504 unsigned_int_compar
);
5505 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
5506 if (offsetp
[-1] == *offsetp
)
5507 complaint (&symfile_complaints
,
5508 _("Multiple children of DIE 0x%x refer "
5509 "to DIE 0x%x as their abstract origin"),
5510 die
->offset
, *offsetp
);
5513 origin_child_die
= origin_die
->child
;
5514 while (origin_child_die
&& origin_child_die
->tag
)
5516 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5517 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
5519 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
5521 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5522 process_die (origin_child_die
, origin_cu
);
5524 origin_child_die
= sibling_die (origin_child_die
);
5526 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
5528 do_cleanups (cleanups
);
5532 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5534 struct objfile
*objfile
= cu
->objfile
;
5535 struct context_stack
*new;
5538 struct die_info
*child_die
;
5539 struct attribute
*attr
, *call_line
, *call_file
;
5542 struct block
*block
;
5543 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
5544 VEC (symbolp
) *template_args
= NULL
;
5545 struct template_symbol
*templ_func
= NULL
;
5549 /* If we do not have call site information, we can't show the
5550 caller of this inlined function. That's too confusing, so
5551 only use the scope for local variables. */
5552 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
5553 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
5554 if (call_line
== NULL
|| call_file
== NULL
)
5556 read_lexical_block_scope (die
, cu
);
5561 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5563 name
= dwarf2_name (die
, cu
);
5565 /* Ignore functions with missing or empty names. These are actually
5566 illegal according to the DWARF standard. */
5569 complaint (&symfile_complaints
,
5570 _("missing name for subprogram DIE at %d"), die
->offset
);
5574 /* Ignore functions with missing or invalid low and high pc attributes. */
5575 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5577 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5578 if (!attr
|| !DW_UNSND (attr
))
5579 complaint (&symfile_complaints
,
5580 _("cannot get low and high bounds "
5581 "for subprogram DIE at %d"),
5589 /* Record the function range for dwarf_decode_lines. */
5590 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
5592 /* If we have any template arguments, then we must allocate a
5593 different sort of symbol. */
5594 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
5596 if (child_die
->tag
== DW_TAG_template_type_param
5597 || child_die
->tag
== DW_TAG_template_value_param
)
5599 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5600 struct template_symbol
);
5601 templ_func
->base
.is_cplus_template_function
= 1;
5606 new = push_context (0, lowpc
);
5607 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
5608 (struct symbol
*) templ_func
);
5610 /* If there is a location expression for DW_AT_frame_base, record
5612 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
5614 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5615 expression is being recorded directly in the function's symbol
5616 and not in a separate frame-base object. I guess this hack is
5617 to avoid adding some sort of frame-base adjunct/annex to the
5618 function's symbol :-(. The problem with doing this is that it
5619 results in a function symbol with a location expression that
5620 has nothing to do with the location of the function, ouch! The
5621 relationship should be: a function's symbol has-a frame base; a
5622 frame-base has-a location expression. */
5623 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
5625 cu
->list_in_scope
= &local_symbols
;
5627 if (die
->child
!= NULL
)
5629 child_die
= die
->child
;
5630 while (child_die
&& child_die
->tag
)
5632 if (child_die
->tag
== DW_TAG_template_type_param
5633 || child_die
->tag
== DW_TAG_template_value_param
)
5635 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
5638 VEC_safe_push (symbolp
, template_args
, arg
);
5641 process_die (child_die
, cu
);
5642 child_die
= sibling_die (child_die
);
5646 inherit_abstract_dies (die
, cu
);
5648 /* If we have a DW_AT_specification, we might need to import using
5649 directives from the context of the specification DIE. See the
5650 comment in determine_prefix. */
5651 if (cu
->language
== language_cplus
5652 && dwarf2_attr (die
, DW_AT_specification
, cu
))
5654 struct dwarf2_cu
*spec_cu
= cu
;
5655 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
5659 child_die
= spec_die
->child
;
5660 while (child_die
&& child_die
->tag
)
5662 if (child_die
->tag
== DW_TAG_imported_module
)
5663 process_die (child_die
, spec_cu
);
5664 child_die
= sibling_die (child_die
);
5667 /* In some cases, GCC generates specification DIEs that
5668 themselves contain DW_AT_specification attributes. */
5669 spec_die
= die_specification (spec_die
, &spec_cu
);
5673 new = pop_context ();
5674 /* Make a block for the local symbols within. */
5675 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
5676 lowpc
, highpc
, objfile
);
5678 /* For C++, set the block's scope. */
5679 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
5680 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
5681 determine_prefix (die
, cu
),
5682 processing_has_namespace_info
);
5684 /* If we have address ranges, record them. */
5685 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5687 /* Attach template arguments to function. */
5688 if (! VEC_empty (symbolp
, template_args
))
5690 gdb_assert (templ_func
!= NULL
);
5692 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
5693 templ_func
->template_arguments
5694 = obstack_alloc (&objfile
->objfile_obstack
,
5695 (templ_func
->n_template_arguments
5696 * sizeof (struct symbol
*)));
5697 memcpy (templ_func
->template_arguments
,
5698 VEC_address (symbolp
, template_args
),
5699 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
5700 VEC_free (symbolp
, template_args
);
5703 /* In C++, we can have functions nested inside functions (e.g., when
5704 a function declares a class that has methods). This means that
5705 when we finish processing a function scope, we may need to go
5706 back to building a containing block's symbol lists. */
5707 local_symbols
= new->locals
;
5708 param_symbols
= new->params
;
5709 using_directives
= new->using_directives
;
5711 /* If we've finished processing a top-level function, subsequent
5712 symbols go in the file symbol list. */
5713 if (outermost_context_p ())
5714 cu
->list_in_scope
= &file_symbols
;
5717 /* Process all the DIES contained within a lexical block scope. Start
5718 a new scope, process the dies, and then close the scope. */
5721 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5723 struct objfile
*objfile
= cu
->objfile
;
5724 struct context_stack
*new;
5725 CORE_ADDR lowpc
, highpc
;
5726 struct die_info
*child_die
;
5729 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5731 /* Ignore blocks with missing or invalid low and high pc attributes. */
5732 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5733 as multiple lexical blocks? Handling children in a sane way would
5734 be nasty. Might be easier to properly extend generic blocks to
5736 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5741 push_context (0, lowpc
);
5742 if (die
->child
!= NULL
)
5744 child_die
= die
->child
;
5745 while (child_die
&& child_die
->tag
)
5747 process_die (child_die
, cu
);
5748 child_die
= sibling_die (child_die
);
5751 new = pop_context ();
5753 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
5756 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
5759 /* Note that recording ranges after traversing children, as we
5760 do here, means that recording a parent's ranges entails
5761 walking across all its children's ranges as they appear in
5762 the address map, which is quadratic behavior.
5764 It would be nicer to record the parent's ranges before
5765 traversing its children, simply overriding whatever you find
5766 there. But since we don't even decide whether to create a
5767 block until after we've traversed its children, that's hard
5769 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5771 local_symbols
= new->locals
;
5772 using_directives
= new->using_directives
;
5775 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5776 Return 1 if the attributes are present and valid, otherwise, return 0.
5777 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5780 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
5781 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
5782 struct partial_symtab
*ranges_pst
)
5784 struct objfile
*objfile
= cu
->objfile
;
5785 struct comp_unit_head
*cu_header
= &cu
->header
;
5786 bfd
*obfd
= objfile
->obfd
;
5787 unsigned int addr_size
= cu_header
->addr_size
;
5788 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5789 /* Base address selection entry. */
5800 found_base
= cu
->base_known
;
5801 base
= cu
->base_address
;
5803 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
5804 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5806 complaint (&symfile_complaints
,
5807 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5811 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5813 /* Read in the largest possible address. */
5814 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
5815 if ((marker
& mask
) == mask
)
5817 /* If we found the largest possible address, then
5818 read the base address. */
5819 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5820 buffer
+= 2 * addr_size
;
5821 offset
+= 2 * addr_size
;
5827 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5831 CORE_ADDR range_beginning
, range_end
;
5833 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
5834 buffer
+= addr_size
;
5835 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
5836 buffer
+= addr_size
;
5837 offset
+= 2 * addr_size
;
5839 /* An end of list marker is a pair of zero addresses. */
5840 if (range_beginning
== 0 && range_end
== 0)
5841 /* Found the end of list entry. */
5844 /* Each base address selection entry is a pair of 2 values.
5845 The first is the largest possible address, the second is
5846 the base address. Check for a base address here. */
5847 if ((range_beginning
& mask
) == mask
)
5849 /* If we found the largest possible address, then
5850 read the base address. */
5851 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5858 /* We have no valid base address for the ranges
5860 complaint (&symfile_complaints
,
5861 _("Invalid .debug_ranges data (no base address)"));
5865 range_beginning
+= base
;
5868 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
5869 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5870 range_beginning
+ baseaddr
,
5871 range_end
- 1 + baseaddr
,
5874 /* FIXME: This is recording everything as a low-high
5875 segment of consecutive addresses. We should have a
5876 data structure for discontiguous block ranges
5880 low
= range_beginning
;
5886 if (range_beginning
< low
)
5887 low
= range_beginning
;
5888 if (range_end
> high
)
5894 /* If the first entry is an end-of-list marker, the range
5895 describes an empty scope, i.e. no instructions. */
5901 *high_return
= high
;
5905 /* Get low and high pc attributes from a die. Return 1 if the attributes
5906 are present and valid, otherwise, return 0. Return -1 if the range is
5907 discontinuous, i.e. derived from DW_AT_ranges information. */
5909 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
5910 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
5911 struct partial_symtab
*pst
)
5913 struct attribute
*attr
;
5918 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5921 high
= DW_ADDR (attr
);
5922 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5924 low
= DW_ADDR (attr
);
5926 /* Found high w/o low attribute. */
5929 /* Found consecutive range of addresses. */
5934 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5937 /* Value of the DW_AT_ranges attribute is the offset in the
5938 .debug_ranges section. */
5939 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
5941 /* Found discontinuous range of addresses. */
5949 /* When using the GNU linker, .gnu.linkonce. sections are used to
5950 eliminate duplicate copies of functions and vtables and such.
5951 The linker will arbitrarily choose one and discard the others.
5952 The AT_*_pc values for such functions refer to local labels in
5953 these sections. If the section from that file was discarded, the
5954 labels are not in the output, so the relocs get a value of 0.
5955 If this is a discarded function, mark the pc bounds as invalid,
5956 so that GDB will ignore it. */
5957 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
5965 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
5966 its low and high PC addresses. Do nothing if these addresses could not
5967 be determined. Otherwise, set LOWPC to the low address if it is smaller,
5968 and HIGHPC to the high address if greater than HIGHPC. */
5971 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
5972 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5973 struct dwarf2_cu
*cu
)
5975 CORE_ADDR low
, high
;
5976 struct die_info
*child
= die
->child
;
5978 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
5980 *lowpc
= min (*lowpc
, low
);
5981 *highpc
= max (*highpc
, high
);
5984 /* If the language does not allow nested subprograms (either inside
5985 subprograms or lexical blocks), we're done. */
5986 if (cu
->language
!= language_ada
)
5989 /* Check all the children of the given DIE. If it contains nested
5990 subprograms, then check their pc bounds. Likewise, we need to
5991 check lexical blocks as well, as they may also contain subprogram
5993 while (child
&& child
->tag
)
5995 if (child
->tag
== DW_TAG_subprogram
5996 || child
->tag
== DW_TAG_lexical_block
)
5997 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
5998 child
= sibling_die (child
);
6002 /* Get the low and high pc's represented by the scope DIE, and store
6003 them in *LOWPC and *HIGHPC. If the correct values can't be
6004 determined, set *LOWPC to -1 and *HIGHPC to 0. */
6007 get_scope_pc_bounds (struct die_info
*die
,
6008 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6009 struct dwarf2_cu
*cu
)
6011 CORE_ADDR best_low
= (CORE_ADDR
) -1;
6012 CORE_ADDR best_high
= (CORE_ADDR
) 0;
6013 CORE_ADDR current_low
, current_high
;
6015 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
6017 best_low
= current_low
;
6018 best_high
= current_high
;
6022 struct die_info
*child
= die
->child
;
6024 while (child
&& child
->tag
)
6026 switch (child
->tag
) {
6027 case DW_TAG_subprogram
:
6028 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
6030 case DW_TAG_namespace
:
6032 /* FIXME: carlton/2004-01-16: Should we do this for
6033 DW_TAG_class_type/DW_TAG_structure_type, too? I think
6034 that current GCC's always emit the DIEs corresponding
6035 to definitions of methods of classes as children of a
6036 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
6037 the DIEs giving the declarations, which could be
6038 anywhere). But I don't see any reason why the
6039 standards says that they have to be there. */
6040 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
6042 if (current_low
!= ((CORE_ADDR
) -1))
6044 best_low
= min (best_low
, current_low
);
6045 best_high
= max (best_high
, current_high
);
6053 child
= sibling_die (child
);
6058 *highpc
= best_high
;
6061 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
6064 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
6065 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
6067 struct attribute
*attr
;
6069 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
6072 CORE_ADDR high
= DW_ADDR (attr
);
6074 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6077 CORE_ADDR low
= DW_ADDR (attr
);
6079 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
6083 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
6086 bfd
*obfd
= cu
->objfile
->obfd
;
6088 /* The value of the DW_AT_ranges attribute is the offset of the
6089 address range list in the .debug_ranges section. */
6090 unsigned long offset
= DW_UNSND (attr
);
6091 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
6093 /* For some target architectures, but not others, the
6094 read_address function sign-extends the addresses it returns.
6095 To recognize base address selection entries, we need a
6097 unsigned int addr_size
= cu
->header
.addr_size
;
6098 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
6100 /* The base address, to which the next pair is relative. Note
6101 that this 'base' is a DWARF concept: most entries in a range
6102 list are relative, to reduce the number of relocs against the
6103 debugging information. This is separate from this function's
6104 'baseaddr' argument, which GDB uses to relocate debugging
6105 information from a shared library based on the address at
6106 which the library was loaded. */
6107 CORE_ADDR base
= cu
->base_address
;
6108 int base_known
= cu
->base_known
;
6110 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
6111 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
6113 complaint (&symfile_complaints
,
6114 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
6121 unsigned int bytes_read
;
6122 CORE_ADDR start
, end
;
6124 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6125 buffer
+= bytes_read
;
6126 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6127 buffer
+= bytes_read
;
6129 /* Did we find the end of the range list? */
6130 if (start
== 0 && end
== 0)
6133 /* Did we find a base address selection entry? */
6134 else if ((start
& base_select_mask
) == base_select_mask
)
6140 /* We found an ordinary address range. */
6145 complaint (&symfile_complaints
,
6146 _("Invalid .debug_ranges data "
6147 "(no base address)"));
6151 record_block_range (block
,
6152 baseaddr
+ base
+ start
,
6153 baseaddr
+ base
+ end
- 1);
6159 /* Add an aggregate field to the field list. */
6162 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
6163 struct dwarf2_cu
*cu
)
6165 struct objfile
*objfile
= cu
->objfile
;
6166 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6167 struct nextfield
*new_field
;
6168 struct attribute
*attr
;
6170 char *fieldname
= "";
6172 /* Allocate a new field list entry and link it in. */
6173 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
6174 make_cleanup (xfree
, new_field
);
6175 memset (new_field
, 0, sizeof (struct nextfield
));
6177 if (die
->tag
== DW_TAG_inheritance
)
6179 new_field
->next
= fip
->baseclasses
;
6180 fip
->baseclasses
= new_field
;
6184 new_field
->next
= fip
->fields
;
6185 fip
->fields
= new_field
;
6189 /* Handle accessibility and virtuality of field.
6190 The default accessibility for members is public, the default
6191 accessibility for inheritance is private. */
6192 if (die
->tag
!= DW_TAG_inheritance
)
6193 new_field
->accessibility
= DW_ACCESS_public
;
6195 new_field
->accessibility
= DW_ACCESS_private
;
6196 new_field
->virtuality
= DW_VIRTUALITY_none
;
6198 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6200 new_field
->accessibility
= DW_UNSND (attr
);
6201 if (new_field
->accessibility
!= DW_ACCESS_public
)
6202 fip
->non_public_fields
= 1;
6203 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6205 new_field
->virtuality
= DW_UNSND (attr
);
6207 fp
= &new_field
->field
;
6209 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
6211 /* Data member other than a C++ static data member. */
6213 /* Get type of field. */
6214 fp
->type
= die_type (die
, cu
);
6216 SET_FIELD_BITPOS (*fp
, 0);
6218 /* Get bit size of field (zero if none). */
6219 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
6222 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
6226 FIELD_BITSIZE (*fp
) = 0;
6229 /* Get bit offset of field. */
6230 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6233 int byte_offset
= 0;
6235 if (attr_form_is_section_offset (attr
))
6236 dwarf2_complex_location_expr_complaint ();
6237 else if (attr_form_is_constant (attr
))
6238 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6239 else if (attr_form_is_block (attr
))
6240 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6242 dwarf2_complex_location_expr_complaint ();
6244 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6246 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
6249 if (gdbarch_bits_big_endian (gdbarch
))
6251 /* For big endian bits, the DW_AT_bit_offset gives the
6252 additional bit offset from the MSB of the containing
6253 anonymous object to the MSB of the field. We don't
6254 have to do anything special since we don't need to
6255 know the size of the anonymous object. */
6256 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
6260 /* For little endian bits, compute the bit offset to the
6261 MSB of the anonymous object, subtract off the number of
6262 bits from the MSB of the field to the MSB of the
6263 object, and then subtract off the number of bits of
6264 the field itself. The result is the bit offset of
6265 the LSB of the field. */
6267 int bit_offset
= DW_UNSND (attr
);
6269 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6272 /* The size of the anonymous object containing
6273 the bit field is explicit, so use the
6274 indicated size (in bytes). */
6275 anonymous_size
= DW_UNSND (attr
);
6279 /* The size of the anonymous object containing
6280 the bit field must be inferred from the type
6281 attribute of the data member containing the
6283 anonymous_size
= TYPE_LENGTH (fp
->type
);
6285 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
6286 - bit_offset
- FIELD_BITSIZE (*fp
);
6290 /* Get name of field. */
6291 fieldname
= dwarf2_name (die
, cu
);
6292 if (fieldname
== NULL
)
6295 /* The name is already allocated along with this objfile, so we don't
6296 need to duplicate it for the type. */
6297 fp
->name
= fieldname
;
6299 /* Change accessibility for artificial fields (e.g. virtual table
6300 pointer or virtual base class pointer) to private. */
6301 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
6303 FIELD_ARTIFICIAL (*fp
) = 1;
6304 new_field
->accessibility
= DW_ACCESS_private
;
6305 fip
->non_public_fields
= 1;
6308 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
6310 /* C++ static member. */
6312 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
6313 is a declaration, but all versions of G++ as of this writing
6314 (so through at least 3.2.1) incorrectly generate
6315 DW_TAG_variable tags. */
6319 /* Get name of field. */
6320 fieldname
= dwarf2_name (die
, cu
);
6321 if (fieldname
== NULL
)
6324 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
6326 /* Only create a symbol if this is an external value.
6327 new_symbol checks this and puts the value in the global symbol
6328 table, which we want. If it is not external, new_symbol
6329 will try to put the value in cu->list_in_scope which is wrong. */
6330 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
6332 /* A static const member, not much different than an enum as far as
6333 we're concerned, except that we can support more types. */
6334 new_symbol (die
, NULL
, cu
);
6337 /* Get physical name. */
6338 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6340 /* The name is already allocated along with this objfile, so we don't
6341 need to duplicate it for the type. */
6342 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
6343 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6344 FIELD_NAME (*fp
) = fieldname
;
6346 else if (die
->tag
== DW_TAG_inheritance
)
6348 /* C++ base class field. */
6349 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6352 int byte_offset
= 0;
6354 if (attr_form_is_section_offset (attr
))
6355 dwarf2_complex_location_expr_complaint ();
6356 else if (attr_form_is_constant (attr
))
6357 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6358 else if (attr_form_is_block (attr
))
6359 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6361 dwarf2_complex_location_expr_complaint ();
6363 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6365 FIELD_BITSIZE (*fp
) = 0;
6366 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6367 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
6368 fip
->nbaseclasses
++;
6372 /* Add a typedef defined in the scope of the FIP's class. */
6375 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
6376 struct dwarf2_cu
*cu
)
6378 struct objfile
*objfile
= cu
->objfile
;
6379 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6380 struct typedef_field_list
*new_field
;
6381 struct attribute
*attr
;
6382 struct typedef_field
*fp
;
6383 char *fieldname
= "";
6385 /* Allocate a new field list entry and link it in. */
6386 new_field
= xzalloc (sizeof (*new_field
));
6387 make_cleanup (xfree
, new_field
);
6389 gdb_assert (die
->tag
== DW_TAG_typedef
);
6391 fp
= &new_field
->field
;
6393 /* Get name of field. */
6394 fp
->name
= dwarf2_name (die
, cu
);
6395 if (fp
->name
== NULL
)
6398 fp
->type
= read_type_die (die
, cu
);
6400 new_field
->next
= fip
->typedef_field_list
;
6401 fip
->typedef_field_list
= new_field
;
6402 fip
->typedef_field_list_count
++;
6405 /* Create the vector of fields, and attach it to the type. */
6408 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
6409 struct dwarf2_cu
*cu
)
6411 int nfields
= fip
->nfields
;
6413 /* Record the field count, allocate space for the array of fields,
6414 and create blank accessibility bitfields if necessary. */
6415 TYPE_NFIELDS (type
) = nfields
;
6416 TYPE_FIELDS (type
) = (struct field
*)
6417 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
6418 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
6420 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
6422 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6424 TYPE_FIELD_PRIVATE_BITS (type
) =
6425 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6426 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
6428 TYPE_FIELD_PROTECTED_BITS (type
) =
6429 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6430 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
6432 TYPE_FIELD_IGNORE_BITS (type
) =
6433 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6434 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
6437 /* If the type has baseclasses, allocate and clear a bit vector for
6438 TYPE_FIELD_VIRTUAL_BITS. */
6439 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
6441 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
6442 unsigned char *pointer
;
6444 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6445 pointer
= TYPE_ALLOC (type
, num_bytes
);
6446 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
6447 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
6448 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
6451 /* Copy the saved-up fields into the field vector. Start from the head of
6452 the list, adding to the tail of the field array, so that they end up in
6453 the same order in the array in which they were added to the list. */
6454 while (nfields
-- > 0)
6456 struct nextfield
*fieldp
;
6460 fieldp
= fip
->fields
;
6461 fip
->fields
= fieldp
->next
;
6465 fieldp
= fip
->baseclasses
;
6466 fip
->baseclasses
= fieldp
->next
;
6469 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
6470 switch (fieldp
->accessibility
)
6472 case DW_ACCESS_private
:
6473 if (cu
->language
!= language_ada
)
6474 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
6477 case DW_ACCESS_protected
:
6478 if (cu
->language
!= language_ada
)
6479 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
6482 case DW_ACCESS_public
:
6486 /* Unknown accessibility. Complain and treat it as public. */
6488 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
6489 fieldp
->accessibility
);
6493 if (nfields
< fip
->nbaseclasses
)
6495 switch (fieldp
->virtuality
)
6497 case DW_VIRTUALITY_virtual
:
6498 case DW_VIRTUALITY_pure_virtual
:
6499 if (cu
->language
== language_ada
)
6500 error (_("unexpected virtuality in component of Ada type"));
6501 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
6508 /* Add a member function to the proper fieldlist. */
6511 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
6512 struct type
*type
, struct dwarf2_cu
*cu
)
6514 struct objfile
*objfile
= cu
->objfile
;
6515 struct attribute
*attr
;
6516 struct fnfieldlist
*flp
;
6518 struct fn_field
*fnp
;
6520 struct nextfnfield
*new_fnfield
;
6521 struct type
*this_type
;
6523 if (cu
->language
== language_ada
)
6524 error (_("unexpected member function in Ada type"));
6526 /* Get name of member function. */
6527 fieldname
= dwarf2_name (die
, cu
);
6528 if (fieldname
== NULL
)
6531 /* Look up member function name in fieldlist. */
6532 for (i
= 0; i
< fip
->nfnfields
; i
++)
6534 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
6538 /* Create new list element if necessary. */
6539 if (i
< fip
->nfnfields
)
6540 flp
= &fip
->fnfieldlists
[i
];
6543 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
6545 fip
->fnfieldlists
= (struct fnfieldlist
*)
6546 xrealloc (fip
->fnfieldlists
,
6547 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
6548 * sizeof (struct fnfieldlist
));
6549 if (fip
->nfnfields
== 0)
6550 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
6552 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
6553 flp
->name
= fieldname
;
6556 i
= fip
->nfnfields
++;
6559 /* Create a new member function field and chain it to the field list
6561 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
6562 make_cleanup (xfree
, new_fnfield
);
6563 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
6564 new_fnfield
->next
= flp
->head
;
6565 flp
->head
= new_fnfield
;
6568 /* Fill in the member function field info. */
6569 fnp
= &new_fnfield
->fnfield
;
6571 /* Delay processing of the physname until later. */
6572 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
6574 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
6579 char *physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6580 fnp
->physname
= physname
? physname
: "";
6583 fnp
->type
= alloc_type (objfile
);
6584 this_type
= read_type_die (die
, cu
);
6585 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
6587 int nparams
= TYPE_NFIELDS (this_type
);
6589 /* TYPE is the domain of this method, and THIS_TYPE is the type
6590 of the method itself (TYPE_CODE_METHOD). */
6591 smash_to_method_type (fnp
->type
, type
,
6592 TYPE_TARGET_TYPE (this_type
),
6593 TYPE_FIELDS (this_type
),
6594 TYPE_NFIELDS (this_type
),
6595 TYPE_VARARGS (this_type
));
6597 /* Handle static member functions.
6598 Dwarf2 has no clean way to discern C++ static and non-static
6599 member functions. G++ helps GDB by marking the first
6600 parameter for non-static member functions (which is the this
6601 pointer) as artificial. We obtain this information from
6602 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
6603 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
6604 fnp
->voffset
= VOFFSET_STATIC
;
6607 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
6608 dwarf2_full_name (fieldname
, die
, cu
));
6610 /* Get fcontext from DW_AT_containing_type if present. */
6611 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6612 fnp
->fcontext
= die_containing_type (die
, cu
);
6614 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
6615 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
6617 /* Get accessibility. */
6618 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6621 switch (DW_UNSND (attr
))
6623 case DW_ACCESS_private
:
6624 fnp
->is_private
= 1;
6626 case DW_ACCESS_protected
:
6627 fnp
->is_protected
= 1;
6632 /* Check for artificial methods. */
6633 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
6634 if (attr
&& DW_UNSND (attr
) != 0)
6635 fnp
->is_artificial
= 1;
6637 /* Get index in virtual function table if it is a virtual member
6638 function. For older versions of GCC, this is an offset in the
6639 appropriate virtual table, as specified by DW_AT_containing_type.
6640 For everyone else, it is an expression to be evaluated relative
6641 to the object address. */
6643 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
6646 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
6648 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
6650 /* Old-style GCC. */
6651 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
6653 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6654 || (DW_BLOCK (attr
)->size
> 1
6655 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
6656 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
6658 struct dwarf_block blk
;
6661 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6663 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
6664 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
6665 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6666 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
6667 dwarf2_complex_location_expr_complaint ();
6669 fnp
->voffset
/= cu
->header
.addr_size
;
6673 dwarf2_complex_location_expr_complaint ();
6676 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
6678 else if (attr_form_is_section_offset (attr
))
6680 dwarf2_complex_location_expr_complaint ();
6684 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
6690 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6691 if (attr
&& DW_UNSND (attr
))
6693 /* GCC does this, as of 2008-08-25; PR debug/37237. */
6694 complaint (&symfile_complaints
,
6695 _("Member function \"%s\" (offset %d) is virtual "
6696 "but the vtable offset is not specified"),
6697 fieldname
, die
->offset
);
6698 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6699 TYPE_CPLUS_DYNAMIC (type
) = 1;
6704 /* Create the vector of member function fields, and attach it to the type. */
6707 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
6708 struct dwarf2_cu
*cu
)
6710 struct fnfieldlist
*flp
;
6711 int total_length
= 0;
6714 if (cu
->language
== language_ada
)
6715 error (_("unexpected member functions in Ada type"));
6717 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6718 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
6719 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
6721 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
6723 struct nextfnfield
*nfp
= flp
->head
;
6724 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
6727 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
6728 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
6729 fn_flp
->fn_fields
= (struct fn_field
*)
6730 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
6731 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
6732 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
6734 total_length
+= flp
->length
;
6737 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
6738 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
6741 /* Returns non-zero if NAME is the name of a vtable member in CU's
6742 language, zero otherwise. */
6744 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
6746 static const char vptr
[] = "_vptr";
6747 static const char vtable
[] = "vtable";
6749 /* Look for the C++ and Java forms of the vtable. */
6750 if ((cu
->language
== language_java
6751 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
6752 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
6753 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
6759 /* GCC outputs unnamed structures that are really pointers to member
6760 functions, with the ABI-specified layout. If TYPE describes
6761 such a structure, smash it into a member function type.
6763 GCC shouldn't do this; it should just output pointer to member DIEs.
6764 This is GCC PR debug/28767. */
6767 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
6769 struct type
*pfn_type
, *domain_type
, *new_type
;
6771 /* Check for a structure with no name and two children. */
6772 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
6775 /* Check for __pfn and __delta members. */
6776 if (TYPE_FIELD_NAME (type
, 0) == NULL
6777 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
6778 || TYPE_FIELD_NAME (type
, 1) == NULL
6779 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
6782 /* Find the type of the method. */
6783 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
6784 if (pfn_type
== NULL
6785 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
6786 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
6789 /* Look for the "this" argument. */
6790 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
6791 if (TYPE_NFIELDS (pfn_type
) == 0
6792 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6793 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
6796 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
6797 new_type
= alloc_type (objfile
);
6798 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
6799 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
6800 TYPE_VARARGS (pfn_type
));
6801 smash_to_methodptr_type (type
, new_type
);
6804 /* Called when we find the DIE that starts a structure or union scope
6805 (definition) to create a type for the structure or union. Fill in
6806 the type's name and general properties; the members will not be
6807 processed until process_structure_type.
6809 NOTE: we need to call these functions regardless of whether or not the
6810 DIE has a DW_AT_name attribute, since it might be an anonymous
6811 structure or union. This gets the type entered into our set of
6814 However, if the structure is incomplete (an opaque struct/union)
6815 then suppress creating a symbol table entry for it since gdb only
6816 wants to find the one with the complete definition. Note that if
6817 it is complete, we just call new_symbol, which does it's own
6818 checking about whether the struct/union is anonymous or not (and
6819 suppresses creating a symbol table entry itself). */
6821 static struct type
*
6822 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6824 struct objfile
*objfile
= cu
->objfile
;
6826 struct attribute
*attr
;
6829 /* If the definition of this type lives in .debug_types, read that type.
6830 Don't follow DW_AT_specification though, that will take us back up
6831 the chain and we want to go down. */
6832 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
6835 struct dwarf2_cu
*type_cu
= cu
;
6836 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
6838 /* We could just recurse on read_structure_type, but we need to call
6839 get_die_type to ensure only one type for this DIE is created.
6840 This is important, for example, because for c++ classes we need
6841 TYPE_NAME set which is only done by new_symbol. Blech. */
6842 type
= read_type_die (type_die
, type_cu
);
6844 /* TYPE_CU may not be the same as CU.
6845 Ensure TYPE is recorded in CU's type_hash table. */
6846 return set_die_type (die
, type
, cu
);
6849 type
= alloc_type (objfile
);
6850 INIT_CPLUS_SPECIFIC (type
);
6852 name
= dwarf2_name (die
, cu
);
6855 if (cu
->language
== language_cplus
6856 || cu
->language
== language_java
)
6858 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
6860 /* dwarf2_full_name might have already finished building the DIE's
6861 type. If so, there is no need to continue. */
6862 if (get_die_type (die
, cu
) != NULL
)
6863 return get_die_type (die
, cu
);
6865 TYPE_TAG_NAME (type
) = full_name
;
6866 if (die
->tag
== DW_TAG_structure_type
6867 || die
->tag
== DW_TAG_class_type
)
6868 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6872 /* The name is already allocated along with this objfile, so
6873 we don't need to duplicate it for the type. */
6874 TYPE_TAG_NAME (type
) = (char *) name
;
6875 if (die
->tag
== DW_TAG_class_type
)
6876 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6880 if (die
->tag
== DW_TAG_structure_type
)
6882 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
6884 else if (die
->tag
== DW_TAG_union_type
)
6886 TYPE_CODE (type
) = TYPE_CODE_UNION
;
6890 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
6893 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
6894 TYPE_DECLARED_CLASS (type
) = 1;
6896 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6899 TYPE_LENGTH (type
) = DW_UNSND (attr
);
6903 TYPE_LENGTH (type
) = 0;
6906 TYPE_STUB_SUPPORTED (type
) = 1;
6907 if (die_is_declaration (die
, cu
))
6908 TYPE_STUB (type
) = 1;
6909 else if (attr
== NULL
&& die
->child
== NULL
6910 && producer_is_realview (cu
->producer
))
6911 /* RealView does not output the required DW_AT_declaration
6912 on incomplete types. */
6913 TYPE_STUB (type
) = 1;
6915 /* We need to add the type field to the die immediately so we don't
6916 infinitely recurse when dealing with pointers to the structure
6917 type within the structure itself. */
6918 set_die_type (die
, type
, cu
);
6920 /* set_die_type should be already done. */
6921 set_descriptive_type (type
, die
, cu
);
6926 /* Finish creating a structure or union type, including filling in
6927 its members and creating a symbol for it. */
6930 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6932 struct objfile
*objfile
= cu
->objfile
;
6933 struct die_info
*child_die
= die
->child
;
6936 type
= get_die_type (die
, cu
);
6938 type
= read_structure_type (die
, cu
);
6940 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
6942 struct field_info fi
;
6943 struct die_info
*child_die
;
6944 VEC (symbolp
) *template_args
= NULL
;
6945 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
6947 memset (&fi
, 0, sizeof (struct field_info
));
6949 child_die
= die
->child
;
6951 while (child_die
&& child_die
->tag
)
6953 if (child_die
->tag
== DW_TAG_member
6954 || child_die
->tag
== DW_TAG_variable
)
6956 /* NOTE: carlton/2002-11-05: A C++ static data member
6957 should be a DW_TAG_member that is a declaration, but
6958 all versions of G++ as of this writing (so through at
6959 least 3.2.1) incorrectly generate DW_TAG_variable
6960 tags for them instead. */
6961 dwarf2_add_field (&fi
, child_die
, cu
);
6963 else if (child_die
->tag
== DW_TAG_subprogram
)
6965 /* C++ member function. */
6966 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
6968 else if (child_die
->tag
== DW_TAG_inheritance
)
6970 /* C++ base class field. */
6971 dwarf2_add_field (&fi
, child_die
, cu
);
6973 else if (child_die
->tag
== DW_TAG_typedef
)
6974 dwarf2_add_typedef (&fi
, child_die
, cu
);
6975 else if (child_die
->tag
== DW_TAG_template_type_param
6976 || child_die
->tag
== DW_TAG_template_value_param
)
6978 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
6981 VEC_safe_push (symbolp
, template_args
, arg
);
6984 child_die
= sibling_die (child_die
);
6987 /* Attach template arguments to type. */
6988 if (! VEC_empty (symbolp
, template_args
))
6990 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6991 TYPE_N_TEMPLATE_ARGUMENTS (type
)
6992 = VEC_length (symbolp
, template_args
);
6993 TYPE_TEMPLATE_ARGUMENTS (type
)
6994 = obstack_alloc (&objfile
->objfile_obstack
,
6995 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
6996 * sizeof (struct symbol
*)));
6997 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
6998 VEC_address (symbolp
, template_args
),
6999 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
7000 * sizeof (struct symbol
*)));
7001 VEC_free (symbolp
, template_args
);
7004 /* Attach fields and member functions to the type. */
7006 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
7009 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
7011 /* Get the type which refers to the base class (possibly this
7012 class itself) which contains the vtable pointer for the current
7013 class from the DW_AT_containing_type attribute. This use of
7014 DW_AT_containing_type is a GNU extension. */
7016 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
7018 struct type
*t
= die_containing_type (die
, cu
);
7020 TYPE_VPTR_BASETYPE (type
) = t
;
7025 /* Our own class provides vtbl ptr. */
7026 for (i
= TYPE_NFIELDS (t
) - 1;
7027 i
>= TYPE_N_BASECLASSES (t
);
7030 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
7032 if (is_vtable_name (fieldname
, cu
))
7034 TYPE_VPTR_FIELDNO (type
) = i
;
7039 /* Complain if virtual function table field not found. */
7040 if (i
< TYPE_N_BASECLASSES (t
))
7041 complaint (&symfile_complaints
,
7042 _("virtual function table pointer "
7043 "not found when defining class '%s'"),
7044 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
7049 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
7052 else if (cu
->producer
7053 && strncmp (cu
->producer
,
7054 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
7056 /* The IBM XLC compiler does not provide direct indication
7057 of the containing type, but the vtable pointer is
7058 always named __vfp. */
7062 for (i
= TYPE_NFIELDS (type
) - 1;
7063 i
>= TYPE_N_BASECLASSES (type
);
7066 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
7068 TYPE_VPTR_FIELDNO (type
) = i
;
7069 TYPE_VPTR_BASETYPE (type
) = type
;
7076 /* Copy fi.typedef_field_list linked list elements content into the
7077 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
7078 if (fi
.typedef_field_list
)
7080 int i
= fi
.typedef_field_list_count
;
7082 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7083 TYPE_TYPEDEF_FIELD_ARRAY (type
)
7084 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
7085 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
7087 /* Reverse the list order to keep the debug info elements order. */
7090 struct typedef_field
*dest
, *src
;
7092 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
7093 src
= &fi
.typedef_field_list
->field
;
7094 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
7099 do_cleanups (back_to
);
7102 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
7104 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
7105 snapshots) has been known to create a die giving a declaration
7106 for a class that has, as a child, a die giving a definition for a
7107 nested class. So we have to process our children even if the
7108 current die is a declaration. Normally, of course, a declaration
7109 won't have any children at all. */
7111 while (child_die
!= NULL
&& child_die
->tag
)
7113 if (child_die
->tag
== DW_TAG_member
7114 || child_die
->tag
== DW_TAG_variable
7115 || child_die
->tag
== DW_TAG_inheritance
7116 || child_die
->tag
== DW_TAG_template_value_param
7117 || child_die
->tag
== DW_TAG_template_type_param
)
7122 process_die (child_die
, cu
);
7124 child_die
= sibling_die (child_die
);
7127 /* Do not consider external references. According to the DWARF standard,
7128 these DIEs are identified by the fact that they have no byte_size
7129 attribute, and a declaration attribute. */
7130 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
7131 || !die_is_declaration (die
, cu
))
7132 new_symbol (die
, type
, cu
);
7135 /* Given a DW_AT_enumeration_type die, set its type. We do not
7136 complete the type's fields yet, or create any symbols. */
7138 static struct type
*
7139 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7141 struct objfile
*objfile
= cu
->objfile
;
7143 struct attribute
*attr
;
7146 /* If the definition of this type lives in .debug_types, read that type.
7147 Don't follow DW_AT_specification though, that will take us back up
7148 the chain and we want to go down. */
7149 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
7152 struct dwarf2_cu
*type_cu
= cu
;
7153 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
7155 type
= read_type_die (type_die
, type_cu
);
7157 /* TYPE_CU may not be the same as CU.
7158 Ensure TYPE is recorded in CU's type_hash table. */
7159 return set_die_type (die
, type
, cu
);
7162 type
= alloc_type (objfile
);
7164 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
7165 name
= dwarf2_full_name (NULL
, die
, cu
);
7167 TYPE_TAG_NAME (type
) = (char *) name
;
7169 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7172 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7176 TYPE_LENGTH (type
) = 0;
7179 /* The enumeration DIE can be incomplete. In Ada, any type can be
7180 declared as private in the package spec, and then defined only
7181 inside the package body. Such types are known as Taft Amendment
7182 Types. When another package uses such a type, an incomplete DIE
7183 may be generated by the compiler. */
7184 if (die_is_declaration (die
, cu
))
7185 TYPE_STUB (type
) = 1;
7187 return set_die_type (die
, type
, cu
);
7190 /* Given a pointer to a die which begins an enumeration, process all
7191 the dies that define the members of the enumeration, and create the
7192 symbol for the enumeration type.
7194 NOTE: We reverse the order of the element list. */
7197 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7199 struct type
*this_type
;
7201 this_type
= get_die_type (die
, cu
);
7202 if (this_type
== NULL
)
7203 this_type
= read_enumeration_type (die
, cu
);
7205 if (die
->child
!= NULL
)
7207 struct die_info
*child_die
;
7209 struct field
*fields
= NULL
;
7211 int unsigned_enum
= 1;
7214 child_die
= die
->child
;
7215 while (child_die
&& child_die
->tag
)
7217 if (child_die
->tag
!= DW_TAG_enumerator
)
7219 process_die (child_die
, cu
);
7223 name
= dwarf2_name (child_die
, cu
);
7226 sym
= new_symbol (child_die
, this_type
, cu
);
7227 if (SYMBOL_VALUE (sym
) < 0)
7230 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7232 fields
= (struct field
*)
7234 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
7235 * sizeof (struct field
));
7238 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
7239 FIELD_TYPE (fields
[num_fields
]) = NULL
;
7240 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
7241 FIELD_BITSIZE (fields
[num_fields
]) = 0;
7247 child_die
= sibling_die (child_die
);
7252 TYPE_NFIELDS (this_type
) = num_fields
;
7253 TYPE_FIELDS (this_type
) = (struct field
*)
7254 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
7255 memcpy (TYPE_FIELDS (this_type
), fields
,
7256 sizeof (struct field
) * num_fields
);
7260 TYPE_UNSIGNED (this_type
) = 1;
7263 new_symbol (die
, this_type
, cu
);
7266 /* Extract all information from a DW_TAG_array_type DIE and put it in
7267 the DIE's type field. For now, this only handles one dimensional
7270 static struct type
*
7271 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7273 struct objfile
*objfile
= cu
->objfile
;
7274 struct die_info
*child_die
;
7276 struct type
*element_type
, *range_type
, *index_type
;
7277 struct type
**range_types
= NULL
;
7278 struct attribute
*attr
;
7280 struct cleanup
*back_to
;
7283 element_type
= die_type (die
, cu
);
7285 /* The die_type call above may have already set the type for this DIE. */
7286 type
= get_die_type (die
, cu
);
7290 /* Irix 6.2 native cc creates array types without children for
7291 arrays with unspecified length. */
7292 if (die
->child
== NULL
)
7294 index_type
= objfile_type (objfile
)->builtin_int
;
7295 range_type
= create_range_type (NULL
, index_type
, 0, -1);
7296 type
= create_array_type (NULL
, element_type
, range_type
);
7297 return set_die_type (die
, type
, cu
);
7300 back_to
= make_cleanup (null_cleanup
, NULL
);
7301 child_die
= die
->child
;
7302 while (child_die
&& child_die
->tag
)
7304 if (child_die
->tag
== DW_TAG_subrange_type
)
7306 struct type
*child_type
= read_type_die (child_die
, cu
);
7308 if (child_type
!= NULL
)
7310 /* The range type was succesfully read. Save it for the
7311 array type creation. */
7312 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
7314 range_types
= (struct type
**)
7315 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
7316 * sizeof (struct type
*));
7318 make_cleanup (free_current_contents
, &range_types
);
7320 range_types
[ndim
++] = child_type
;
7323 child_die
= sibling_die (child_die
);
7326 /* Dwarf2 dimensions are output from left to right, create the
7327 necessary array types in backwards order. */
7329 type
= element_type
;
7331 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
7336 type
= create_array_type (NULL
, type
, range_types
[i
++]);
7341 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
7344 /* Understand Dwarf2 support for vector types (like they occur on
7345 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
7346 array type. This is not part of the Dwarf2/3 standard yet, but a
7347 custom vendor extension. The main difference between a regular
7348 array and the vector variant is that vectors are passed by value
7350 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
7352 make_vector_type (type
);
7354 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
7355 implementation may choose to implement triple vectors using this
7357 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7360 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
7361 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7363 complaint (&symfile_complaints
,
7364 _("DW_AT_byte_size for array type smaller "
7365 "than the total size of elements"));
7368 name
= dwarf2_name (die
, cu
);
7370 TYPE_NAME (type
) = name
;
7372 /* Install the type in the die. */
7373 set_die_type (die
, type
, cu
);
7375 /* set_die_type should be already done. */
7376 set_descriptive_type (type
, die
, cu
);
7378 do_cleanups (back_to
);
7383 static enum dwarf_array_dim_ordering
7384 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
7386 struct attribute
*attr
;
7388 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
7390 if (attr
) return DW_SND (attr
);
7392 /* GNU F77 is a special case, as at 08/2004 array type info is the
7393 opposite order to the dwarf2 specification, but data is still
7394 laid out as per normal fortran.
7396 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
7397 version checking. */
7399 if (cu
->language
== language_fortran
7400 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
7402 return DW_ORD_row_major
;
7405 switch (cu
->language_defn
->la_array_ordering
)
7407 case array_column_major
:
7408 return DW_ORD_col_major
;
7409 case array_row_major
:
7411 return DW_ORD_row_major
;
7415 /* Extract all information from a DW_TAG_set_type DIE and put it in
7416 the DIE's type field. */
7418 static struct type
*
7419 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7421 struct type
*domain_type
, *set_type
;
7422 struct attribute
*attr
;
7424 domain_type
= die_type (die
, cu
);
7426 /* The die_type call above may have already set the type for this DIE. */
7427 set_type
= get_die_type (die
, cu
);
7431 set_type
= create_set_type (NULL
, domain_type
);
7433 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7435 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
7437 return set_die_type (die
, set_type
, cu
);
7440 /* First cut: install each common block member as a global variable. */
7443 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
7445 struct die_info
*child_die
;
7446 struct attribute
*attr
;
7448 CORE_ADDR base
= (CORE_ADDR
) 0;
7450 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7453 /* Support the .debug_loc offsets. */
7454 if (attr_form_is_block (attr
))
7456 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
7458 else if (attr_form_is_section_offset (attr
))
7460 dwarf2_complex_location_expr_complaint ();
7464 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7465 "common block member");
7468 if (die
->child
!= NULL
)
7470 child_die
= die
->child
;
7471 while (child_die
&& child_die
->tag
)
7473 sym
= new_symbol (child_die
, NULL
, cu
);
7474 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
7475 if (sym
!= NULL
&& attr
!= NULL
)
7477 CORE_ADDR byte_offset
= 0;
7479 if (attr_form_is_section_offset (attr
))
7480 dwarf2_complex_location_expr_complaint ();
7481 else if (attr_form_is_constant (attr
))
7482 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
7483 else if (attr_form_is_block (attr
))
7484 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
7486 dwarf2_complex_location_expr_complaint ();
7488 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
7489 add_symbol_to_list (sym
, &global_symbols
);
7491 child_die
= sibling_die (child_die
);
7496 /* Create a type for a C++ namespace. */
7498 static struct type
*
7499 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7501 struct objfile
*objfile
= cu
->objfile
;
7502 const char *previous_prefix
, *name
;
7506 /* For extensions, reuse the type of the original namespace. */
7507 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
7509 struct die_info
*ext_die
;
7510 struct dwarf2_cu
*ext_cu
= cu
;
7512 ext_die
= dwarf2_extension (die
, &ext_cu
);
7513 type
= read_type_die (ext_die
, ext_cu
);
7515 /* EXT_CU may not be the same as CU.
7516 Ensure TYPE is recorded in CU's type_hash table. */
7517 return set_die_type (die
, type
, cu
);
7520 name
= namespace_name (die
, &is_anonymous
, cu
);
7522 /* Now build the name of the current namespace. */
7524 previous_prefix
= determine_prefix (die
, cu
);
7525 if (previous_prefix
[0] != '\0')
7526 name
= typename_concat (&objfile
->objfile_obstack
,
7527 previous_prefix
, name
, 0, cu
);
7529 /* Create the type. */
7530 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
7532 TYPE_NAME (type
) = (char *) name
;
7533 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7535 return set_die_type (die
, type
, cu
);
7538 /* Read a C++ namespace. */
7541 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7543 struct objfile
*objfile
= cu
->objfile
;
7547 /* Add a symbol associated to this if we haven't seen the namespace
7548 before. Also, add a using directive if it's an anonymous
7551 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
7555 type
= read_type_die (die
, cu
);
7556 new_symbol (die
, type
, cu
);
7558 name
= namespace_name (die
, &is_anonymous
, cu
);
7561 const char *previous_prefix
= determine_prefix (die
, cu
);
7563 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
7564 NULL
, &objfile
->objfile_obstack
);
7568 if (die
->child
!= NULL
)
7570 struct die_info
*child_die
= die
->child
;
7572 while (child_die
&& child_die
->tag
)
7574 process_die (child_die
, cu
);
7575 child_die
= sibling_die (child_die
);
7580 /* Read a Fortran module as type. This DIE can be only a declaration used for
7581 imported module. Still we need that type as local Fortran "use ... only"
7582 declaration imports depend on the created type in determine_prefix. */
7584 static struct type
*
7585 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7587 struct objfile
*objfile
= cu
->objfile
;
7591 module_name
= dwarf2_name (die
, cu
);
7593 complaint (&symfile_complaints
,
7594 _("DW_TAG_module has no name, offset 0x%x"),
7596 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
7598 /* determine_prefix uses TYPE_TAG_NAME. */
7599 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7601 return set_die_type (die
, type
, cu
);
7604 /* Read a Fortran module. */
7607 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
7609 struct die_info
*child_die
= die
->child
;
7611 while (child_die
&& child_die
->tag
)
7613 process_die (child_die
, cu
);
7614 child_die
= sibling_die (child_die
);
7618 /* Return the name of the namespace represented by DIE. Set
7619 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
7623 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
7625 struct die_info
*current_die
;
7626 const char *name
= NULL
;
7628 /* Loop through the extensions until we find a name. */
7630 for (current_die
= die
;
7631 current_die
!= NULL
;
7632 current_die
= dwarf2_extension (die
, &cu
))
7634 name
= dwarf2_name (current_die
, cu
);
7639 /* Is it an anonymous namespace? */
7641 *is_anonymous
= (name
== NULL
);
7643 name
= "(anonymous namespace)";
7648 /* Extract all information from a DW_TAG_pointer_type DIE and add to
7649 the user defined type vector. */
7651 static struct type
*
7652 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7654 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7655 struct comp_unit_head
*cu_header
= &cu
->header
;
7657 struct attribute
*attr_byte_size
;
7658 struct attribute
*attr_address_class
;
7659 int byte_size
, addr_class
;
7660 struct type
*target_type
;
7662 target_type
= die_type (die
, cu
);
7664 /* The die_type call above may have already set the type for this DIE. */
7665 type
= get_die_type (die
, cu
);
7669 type
= lookup_pointer_type (target_type
);
7671 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7673 byte_size
= DW_UNSND (attr_byte_size
);
7675 byte_size
= cu_header
->addr_size
;
7677 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
7678 if (attr_address_class
)
7679 addr_class
= DW_UNSND (attr_address_class
);
7681 addr_class
= DW_ADDR_none
;
7683 /* If the pointer size or address class is different than the
7684 default, create a type variant marked as such and set the
7685 length accordingly. */
7686 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
7688 if (gdbarch_address_class_type_flags_p (gdbarch
))
7692 type_flags
= gdbarch_address_class_type_flags
7693 (gdbarch
, byte_size
, addr_class
);
7694 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
7696 type
= make_type_with_address_space (type
, type_flags
);
7698 else if (TYPE_LENGTH (type
) != byte_size
)
7700 complaint (&symfile_complaints
,
7701 _("invalid pointer size %d"), byte_size
);
7705 /* Should we also complain about unhandled address classes? */
7709 TYPE_LENGTH (type
) = byte_size
;
7710 return set_die_type (die
, type
, cu
);
7713 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
7714 the user defined type vector. */
7716 static struct type
*
7717 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7720 struct type
*to_type
;
7721 struct type
*domain
;
7723 to_type
= die_type (die
, cu
);
7724 domain
= die_containing_type (die
, cu
);
7726 /* The calls above may have already set the type for this DIE. */
7727 type
= get_die_type (die
, cu
);
7731 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
7732 type
= lookup_methodptr_type (to_type
);
7734 type
= lookup_memberptr_type (to_type
, domain
);
7736 return set_die_type (die
, type
, cu
);
7739 /* Extract all information from a DW_TAG_reference_type DIE and add to
7740 the user defined type vector. */
7742 static struct type
*
7743 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7745 struct comp_unit_head
*cu_header
= &cu
->header
;
7746 struct type
*type
, *target_type
;
7747 struct attribute
*attr
;
7749 target_type
= die_type (die
, cu
);
7751 /* The die_type call above may have already set the type for this DIE. */
7752 type
= get_die_type (die
, cu
);
7756 type
= lookup_reference_type (target_type
);
7757 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7760 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7764 TYPE_LENGTH (type
) = cu_header
->addr_size
;
7766 return set_die_type (die
, type
, cu
);
7769 static struct type
*
7770 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7772 struct type
*base_type
, *cv_type
;
7774 base_type
= die_type (die
, cu
);
7776 /* The die_type call above may have already set the type for this DIE. */
7777 cv_type
= get_die_type (die
, cu
);
7781 /* In case the const qualifier is applied to an array type, the element type
7782 is so qualified, not the array type (section 6.7.3 of C99). */
7783 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
7785 struct type
*el_type
, *inner_array
;
7787 base_type
= copy_type (base_type
);
7788 inner_array
= base_type
;
7790 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
7792 TYPE_TARGET_TYPE (inner_array
) =
7793 copy_type (TYPE_TARGET_TYPE (inner_array
));
7794 inner_array
= TYPE_TARGET_TYPE (inner_array
);
7797 el_type
= TYPE_TARGET_TYPE (inner_array
);
7798 TYPE_TARGET_TYPE (inner_array
) =
7799 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
7801 return set_die_type (die
, base_type
, cu
);
7804 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
7805 return set_die_type (die
, cv_type
, cu
);
7808 static struct type
*
7809 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7811 struct type
*base_type
, *cv_type
;
7813 base_type
= die_type (die
, cu
);
7815 /* The die_type call above may have already set the type for this DIE. */
7816 cv_type
= get_die_type (die
, cu
);
7820 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
7821 return set_die_type (die
, cv_type
, cu
);
7824 /* Extract all information from a DW_TAG_string_type DIE and add to
7825 the user defined type vector. It isn't really a user defined type,
7826 but it behaves like one, with other DIE's using an AT_user_def_type
7827 attribute to reference it. */
7829 static struct type
*
7830 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7832 struct objfile
*objfile
= cu
->objfile
;
7833 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7834 struct type
*type
, *range_type
, *index_type
, *char_type
;
7835 struct attribute
*attr
;
7836 unsigned int length
;
7838 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
7841 length
= DW_UNSND (attr
);
7845 /* Check for the DW_AT_byte_size attribute. */
7846 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7849 length
= DW_UNSND (attr
);
7857 index_type
= objfile_type (objfile
)->builtin_int
;
7858 range_type
= create_range_type (NULL
, index_type
, 1, length
);
7859 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
7860 type
= create_string_type (NULL
, char_type
, range_type
);
7862 return set_die_type (die
, type
, cu
);
7865 /* Handle DIES due to C code like:
7869 int (*funcp)(int a, long l);
7873 ('funcp' generates a DW_TAG_subroutine_type DIE). */
7875 static struct type
*
7876 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7878 struct type
*type
; /* Type that this function returns. */
7879 struct type
*ftype
; /* Function that returns above type. */
7880 struct attribute
*attr
;
7882 type
= die_type (die
, cu
);
7884 /* The die_type call above may have already set the type for this DIE. */
7885 ftype
= get_die_type (die
, cu
);
7889 ftype
= lookup_function_type (type
);
7891 /* All functions in C++, Pascal and Java have prototypes. */
7892 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
7893 if ((attr
&& (DW_UNSND (attr
) != 0))
7894 || cu
->language
== language_cplus
7895 || cu
->language
== language_java
7896 || cu
->language
== language_pascal
)
7897 TYPE_PROTOTYPED (ftype
) = 1;
7898 else if (producer_is_realview (cu
->producer
))
7899 /* RealView does not emit DW_AT_prototyped. We can not
7900 distinguish prototyped and unprototyped functions; default to
7901 prototyped, since that is more common in modern code (and
7902 RealView warns about unprototyped functions). */
7903 TYPE_PROTOTYPED (ftype
) = 1;
7905 /* Store the calling convention in the type if it's available in
7906 the subroutine die. Otherwise set the calling convention to
7907 the default value DW_CC_normal. */
7908 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
7909 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
7911 /* We need to add the subroutine type to the die immediately so
7912 we don't infinitely recurse when dealing with parameters
7913 declared as the same subroutine type. */
7914 set_die_type (die
, ftype
, cu
);
7916 if (die
->child
!= NULL
)
7918 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
7919 struct die_info
*child_die
;
7920 int nparams
, iparams
;
7922 /* Count the number of parameters.
7923 FIXME: GDB currently ignores vararg functions, but knows about
7924 vararg member functions. */
7926 child_die
= die
->child
;
7927 while (child_die
&& child_die
->tag
)
7929 if (child_die
->tag
== DW_TAG_formal_parameter
)
7931 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
7932 TYPE_VARARGS (ftype
) = 1;
7933 child_die
= sibling_die (child_die
);
7936 /* Allocate storage for parameters and fill them in. */
7937 TYPE_NFIELDS (ftype
) = nparams
;
7938 TYPE_FIELDS (ftype
) = (struct field
*)
7939 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
7941 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
7942 even if we error out during the parameters reading below. */
7943 for (iparams
= 0; iparams
< nparams
; iparams
++)
7944 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
7947 child_die
= die
->child
;
7948 while (child_die
&& child_die
->tag
)
7950 if (child_die
->tag
== DW_TAG_formal_parameter
)
7952 struct type
*arg_type
;
7954 /* DWARF version 2 has no clean way to discern C++
7955 static and non-static member functions. G++ helps
7956 GDB by marking the first parameter for non-static
7957 member functions (which is the this pointer) as
7958 artificial. We pass this information to
7959 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
7961 DWARF version 3 added DW_AT_object_pointer, which GCC
7962 4.5 does not yet generate. */
7963 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
7965 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
7968 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
7970 /* GCC/43521: In java, the formal parameter
7971 "this" is sometimes not marked with DW_AT_artificial. */
7972 if (cu
->language
== language_java
)
7974 const char *name
= dwarf2_name (child_die
, cu
);
7976 if (name
&& !strcmp (name
, "this"))
7977 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
7980 arg_type
= die_type (child_die
, cu
);
7982 /* RealView does not mark THIS as const, which the testsuite
7983 expects. GCC marks THIS as const in method definitions,
7984 but not in the class specifications (GCC PR 43053). */
7985 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
7986 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
7989 struct dwarf2_cu
*arg_cu
= cu
;
7990 const char *name
= dwarf2_name (child_die
, cu
);
7992 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
7995 /* If the compiler emits this, use it. */
7996 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
7999 else if (name
&& strcmp (name
, "this") == 0)
8000 /* Function definitions will have the argument names. */
8002 else if (name
== NULL
&& iparams
== 0)
8003 /* Declarations may not have the names, so like
8004 elsewhere in GDB, assume an artificial first
8005 argument is "this". */
8009 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
8013 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
8016 child_die
= sibling_die (child_die
);
8023 static struct type
*
8024 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
8026 struct objfile
*objfile
= cu
->objfile
;
8027 const char *name
= NULL
;
8028 struct type
*this_type
;
8030 name
= dwarf2_full_name (NULL
, die
, cu
);
8031 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
8032 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
8033 TYPE_NAME (this_type
) = (char *) name
;
8034 set_die_type (die
, this_type
, cu
);
8035 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
8039 /* Find a representation of a given base type and install
8040 it in the TYPE field of the die. */
8042 static struct type
*
8043 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8045 struct objfile
*objfile
= cu
->objfile
;
8047 struct attribute
*attr
;
8048 int encoding
= 0, size
= 0;
8050 enum type_code code
= TYPE_CODE_INT
;
8052 struct type
*target_type
= NULL
;
8054 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
8057 encoding
= DW_UNSND (attr
);
8059 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8062 size
= DW_UNSND (attr
);
8064 name
= dwarf2_name (die
, cu
);
8067 complaint (&symfile_complaints
,
8068 _("DW_AT_name missing from DW_TAG_base_type"));
8073 case DW_ATE_address
:
8074 /* Turn DW_ATE_address into a void * pointer. */
8075 code
= TYPE_CODE_PTR
;
8076 type_flags
|= TYPE_FLAG_UNSIGNED
;
8077 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
8079 case DW_ATE_boolean
:
8080 code
= TYPE_CODE_BOOL
;
8081 type_flags
|= TYPE_FLAG_UNSIGNED
;
8083 case DW_ATE_complex_float
:
8084 code
= TYPE_CODE_COMPLEX
;
8085 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
8087 case DW_ATE_decimal_float
:
8088 code
= TYPE_CODE_DECFLOAT
;
8091 code
= TYPE_CODE_FLT
;
8095 case DW_ATE_unsigned
:
8096 type_flags
|= TYPE_FLAG_UNSIGNED
;
8098 case DW_ATE_signed_char
:
8099 if (cu
->language
== language_ada
|| cu
->language
== language_m2
8100 || cu
->language
== language_pascal
)
8101 code
= TYPE_CODE_CHAR
;
8103 case DW_ATE_unsigned_char
:
8104 if (cu
->language
== language_ada
|| cu
->language
== language_m2
8105 || cu
->language
== language_pascal
)
8106 code
= TYPE_CODE_CHAR
;
8107 type_flags
|= TYPE_FLAG_UNSIGNED
;
8110 /* We just treat this as an integer and then recognize the
8111 type by name elsewhere. */
8115 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
8116 dwarf_type_encoding_name (encoding
));
8120 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
8121 TYPE_NAME (type
) = name
;
8122 TYPE_TARGET_TYPE (type
) = target_type
;
8124 if (name
&& strcmp (name
, "char") == 0)
8125 TYPE_NOSIGN (type
) = 1;
8127 return set_die_type (die
, type
, cu
);
8130 /* Read the given DW_AT_subrange DIE. */
8132 static struct type
*
8133 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8135 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
8136 struct type
*base_type
;
8137 struct type
*range_type
;
8138 struct attribute
*attr
;
8142 LONGEST negative_mask
;
8144 base_type
= die_type (die
, cu
);
8145 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
8146 check_typedef (base_type
);
8148 /* The die_type call above may have already set the type for this DIE. */
8149 range_type
= get_die_type (die
, cu
);
8153 if (cu
->language
== language_fortran
)
8155 /* FORTRAN implies a lower bound of 1, if not given. */
8159 /* FIXME: For variable sized arrays either of these could be
8160 a variable rather than a constant value. We'll allow it,
8161 but we don't know how to handle it. */
8162 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
8164 low
= dwarf2_get_attr_constant_value (attr
, 0);
8166 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
8169 if (attr
->form
== DW_FORM_block1
|| is_ref_attr (attr
))
8171 /* GCC encodes arrays with unspecified or dynamic length
8172 with a DW_FORM_block1 attribute or a reference attribute.
8173 FIXME: GDB does not yet know how to handle dynamic
8174 arrays properly, treat them as arrays with unspecified
8177 FIXME: jimb/2003-09-22: GDB does not really know
8178 how to handle arrays of unspecified length
8179 either; we just represent them as zero-length
8180 arrays. Choose an appropriate upper bound given
8181 the lower bound we've computed above. */
8185 high
= dwarf2_get_attr_constant_value (attr
, 1);
8189 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
8192 int count
= dwarf2_get_attr_constant_value (attr
, 1);
8193 high
= low
+ count
- 1;
8197 /* Dwarf-2 specifications explicitly allows to create subrange types
8198 without specifying a base type.
8199 In that case, the base type must be set to the type of
8200 the lower bound, upper bound or count, in that order, if any of these
8201 three attributes references an object that has a type.
8202 If no base type is found, the Dwarf-2 specifications say that
8203 a signed integer type of size equal to the size of an address should
8205 For the following C code: `extern char gdb_int [];'
8206 GCC produces an empty range DIE.
8207 FIXME: muller/2010-05-28: Possible references to object for low bound,
8208 high bound or count are not yet handled by this code. */
8209 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
8211 struct objfile
*objfile
= cu
->objfile
;
8212 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8213 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
8214 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
8216 /* Test "int", "long int", and "long long int" objfile types,
8217 and select the first one having a size above or equal to the
8218 architecture address size. */
8219 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8220 base_type
= int_type
;
8223 int_type
= objfile_type (objfile
)->builtin_long
;
8224 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8225 base_type
= int_type
;
8228 int_type
= objfile_type (objfile
)->builtin_long_long
;
8229 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8230 base_type
= int_type
;
8236 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
8237 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
8238 low
|= negative_mask
;
8239 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
8240 high
|= negative_mask
;
8242 range_type
= create_range_type (NULL
, base_type
, low
, high
);
8244 /* Mark arrays with dynamic length at least as an array of unspecified
8245 length. GDB could check the boundary but before it gets implemented at
8246 least allow accessing the array elements. */
8247 if (attr
&& attr
->form
== DW_FORM_block1
)
8248 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
8250 name
= dwarf2_name (die
, cu
);
8252 TYPE_NAME (range_type
) = name
;
8254 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8256 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
8258 set_die_type (die
, range_type
, cu
);
8260 /* set_die_type should be already done. */
8261 set_descriptive_type (range_type
, die
, cu
);
8266 static struct type
*
8267 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8271 /* For now, we only support the C meaning of an unspecified type: void. */
8273 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
8274 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
8276 return set_die_type (die
, type
, cu
);
8279 /* Trivial hash function for die_info: the hash value of a DIE
8280 is its offset in .debug_info for this objfile. */
8283 die_hash (const void *item
)
8285 const struct die_info
*die
= item
;
8290 /* Trivial comparison function for die_info structures: two DIEs
8291 are equal if they have the same offset. */
8294 die_eq (const void *item_lhs
, const void *item_rhs
)
8296 const struct die_info
*die_lhs
= item_lhs
;
8297 const struct die_info
*die_rhs
= item_rhs
;
8299 return die_lhs
->offset
== die_rhs
->offset
;
8302 /* Read a whole compilation unit into a linked list of dies. */
8304 static struct die_info
*
8305 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
8307 struct die_reader_specs reader_specs
;
8308 int read_abbrevs
= 0;
8309 struct cleanup
*back_to
= NULL
;
8310 struct die_info
*die
;
8312 if (cu
->dwarf2_abbrevs
== NULL
)
8314 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
8315 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
8319 gdb_assert (cu
->die_hash
== NULL
);
8321 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8325 &cu
->comp_unit_obstack
,
8326 hashtab_obstack_allocate
,
8327 dummy_obstack_deallocate
);
8329 init_cu_die_reader (&reader_specs
, cu
);
8331 die
= read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
8334 do_cleanups (back_to
);
8339 /* Main entry point for reading a DIE and all children.
8340 Read the DIE and dump it if requested. */
8342 static struct die_info
*
8343 read_die_and_children (const struct die_reader_specs
*reader
,
8345 gdb_byte
**new_info_ptr
,
8346 struct die_info
*parent
)
8348 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
8349 new_info_ptr
, parent
);
8351 if (dwarf2_die_debug
)
8353 fprintf_unfiltered (gdb_stdlog
,
8354 "\nRead die from %s of %s:\n",
8355 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
8357 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
8359 : "unknown section",
8360 reader
->abfd
->filename
);
8361 dump_die (result
, dwarf2_die_debug
);
8367 /* Read a single die and all its descendents. Set the die's sibling
8368 field to NULL; set other fields in the die correctly, and set all
8369 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
8370 location of the info_ptr after reading all of those dies. PARENT
8371 is the parent of the die in question. */
8373 static struct die_info
*
8374 read_die_and_children_1 (const struct die_reader_specs
*reader
,
8376 gdb_byte
**new_info_ptr
,
8377 struct die_info
*parent
)
8379 struct die_info
*die
;
8383 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
8386 *new_info_ptr
= cur_ptr
;
8389 store_in_ref_table (die
, reader
->cu
);
8392 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
8396 *new_info_ptr
= cur_ptr
;
8399 die
->sibling
= NULL
;
8400 die
->parent
= parent
;
8404 /* Read a die, all of its descendents, and all of its siblings; set
8405 all of the fields of all of the dies correctly. Arguments are as
8406 in read_die_and_children. */
8408 static struct die_info
*
8409 read_die_and_siblings (const struct die_reader_specs
*reader
,
8411 gdb_byte
**new_info_ptr
,
8412 struct die_info
*parent
)
8414 struct die_info
*first_die
, *last_sibling
;
8418 first_die
= last_sibling
= NULL
;
8422 struct die_info
*die
8423 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
8427 *new_info_ptr
= cur_ptr
;
8434 last_sibling
->sibling
= die
;
8440 /* Read the die from the .debug_info section buffer. Set DIEP to
8441 point to a newly allocated die with its information, except for its
8442 child, sibling, and parent fields. Set HAS_CHILDREN to tell
8443 whether the die has children or not. */
8446 read_full_die (const struct die_reader_specs
*reader
,
8447 struct die_info
**diep
, gdb_byte
*info_ptr
,
8450 unsigned int abbrev_number
, bytes_read
, i
, offset
;
8451 struct abbrev_info
*abbrev
;
8452 struct die_info
*die
;
8453 struct dwarf2_cu
*cu
= reader
->cu
;
8454 bfd
*abfd
= reader
->abfd
;
8456 offset
= info_ptr
- reader
->buffer
;
8457 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8458 info_ptr
+= bytes_read
;
8466 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
8468 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
8470 bfd_get_filename (abfd
));
8472 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
8473 die
->offset
= offset
;
8474 die
->tag
= abbrev
->tag
;
8475 die
->abbrev
= abbrev_number
;
8477 die
->num_attrs
= abbrev
->num_attrs
;
8479 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8480 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
8481 abfd
, info_ptr
, cu
);
8484 *has_children
= abbrev
->has_children
;
8488 /* In DWARF version 2, the description of the debugging information is
8489 stored in a separate .debug_abbrev section. Before we read any
8490 dies from a section we read in all abbreviations and install them
8491 in a hash table. This function also sets flags in CU describing
8492 the data found in the abbrev table. */
8495 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
8497 struct comp_unit_head
*cu_header
= &cu
->header
;
8498 gdb_byte
*abbrev_ptr
;
8499 struct abbrev_info
*cur_abbrev
;
8500 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
8501 unsigned int abbrev_form
, hash_number
;
8502 struct attr_abbrev
*cur_attrs
;
8503 unsigned int allocated_attrs
;
8505 /* Initialize dwarf2 abbrevs. */
8506 obstack_init (&cu
->abbrev_obstack
);
8507 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
8509 * sizeof (struct abbrev_info
*)));
8510 memset (cu
->dwarf2_abbrevs
, 0,
8511 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
8513 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
8514 &dwarf2_per_objfile
->abbrev
);
8515 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
8516 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8517 abbrev_ptr
+= bytes_read
;
8519 allocated_attrs
= ATTR_ALLOC_CHUNK
;
8520 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
8522 /* Loop until we reach an abbrev number of 0. */
8523 while (abbrev_number
)
8525 cur_abbrev
= dwarf_alloc_abbrev (cu
);
8527 /* read in abbrev header */
8528 cur_abbrev
->number
= abbrev_number
;
8529 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8530 abbrev_ptr
+= bytes_read
;
8531 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
8534 if (cur_abbrev
->tag
== DW_TAG_namespace
)
8535 cu
->has_namespace_info
= 1;
8537 /* now read in declarations */
8538 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8539 abbrev_ptr
+= bytes_read
;
8540 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8541 abbrev_ptr
+= bytes_read
;
8544 if (cur_abbrev
->num_attrs
== allocated_attrs
)
8546 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
8548 = xrealloc (cur_attrs
, (allocated_attrs
8549 * sizeof (struct attr_abbrev
)));
8552 /* Record whether this compilation unit might have
8553 inter-compilation-unit references. If we don't know what form
8554 this attribute will have, then it might potentially be a
8555 DW_FORM_ref_addr, so we conservatively expect inter-CU
8558 if (abbrev_form
== DW_FORM_ref_addr
8559 || abbrev_form
== DW_FORM_indirect
)
8560 cu
->has_form_ref_addr
= 1;
8562 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
8563 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
8564 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8565 abbrev_ptr
+= bytes_read
;
8566 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8567 abbrev_ptr
+= bytes_read
;
8570 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
8571 (cur_abbrev
->num_attrs
8572 * sizeof (struct attr_abbrev
)));
8573 memcpy (cur_abbrev
->attrs
, cur_attrs
,
8574 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
8576 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
8577 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
8578 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
8580 /* Get next abbreviation.
8581 Under Irix6 the abbreviations for a compilation unit are not
8582 always properly terminated with an abbrev number of 0.
8583 Exit loop if we encounter an abbreviation which we have
8584 already read (which means we are about to read the abbreviations
8585 for the next compile unit) or if the end of the abbreviation
8586 table is reached. */
8587 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
8588 >= dwarf2_per_objfile
->abbrev
.size
)
8590 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8591 abbrev_ptr
+= bytes_read
;
8592 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
8599 /* Release the memory used by the abbrev table for a compilation unit. */
8602 dwarf2_free_abbrev_table (void *ptr_to_cu
)
8604 struct dwarf2_cu
*cu
= ptr_to_cu
;
8606 obstack_free (&cu
->abbrev_obstack
, NULL
);
8607 cu
->dwarf2_abbrevs
= NULL
;
8610 /* Lookup an abbrev_info structure in the abbrev hash table. */
8612 static struct abbrev_info
*
8613 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
8615 unsigned int hash_number
;
8616 struct abbrev_info
*abbrev
;
8618 hash_number
= number
% ABBREV_HASH_SIZE
;
8619 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
8623 if (abbrev
->number
== number
)
8626 abbrev
= abbrev
->next
;
8631 /* Returns nonzero if TAG represents a type that we might generate a partial
8635 is_type_tag_for_partial (int tag
)
8640 /* Some types that would be reasonable to generate partial symbols for,
8641 that we don't at present. */
8642 case DW_TAG_array_type
:
8643 case DW_TAG_file_type
:
8644 case DW_TAG_ptr_to_member_type
:
8645 case DW_TAG_set_type
:
8646 case DW_TAG_string_type
:
8647 case DW_TAG_subroutine_type
:
8649 case DW_TAG_base_type
:
8650 case DW_TAG_class_type
:
8651 case DW_TAG_interface_type
:
8652 case DW_TAG_enumeration_type
:
8653 case DW_TAG_structure_type
:
8654 case DW_TAG_subrange_type
:
8655 case DW_TAG_typedef
:
8656 case DW_TAG_union_type
:
8663 /* Load all DIEs that are interesting for partial symbols into memory. */
8665 static struct partial_die_info
*
8666 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8667 int building_psymtab
, struct dwarf2_cu
*cu
)
8669 struct partial_die_info
*part_die
;
8670 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
8671 struct abbrev_info
*abbrev
;
8672 unsigned int bytes_read
;
8673 unsigned int load_all
= 0;
8675 int nesting_level
= 1;
8680 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
8684 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8688 &cu
->comp_unit_obstack
,
8689 hashtab_obstack_allocate
,
8690 dummy_obstack_deallocate
);
8692 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8693 sizeof (struct partial_die_info
));
8697 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
8699 /* A NULL abbrev means the end of a series of children. */
8702 if (--nesting_level
== 0)
8704 /* PART_DIE was probably the last thing allocated on the
8705 comp_unit_obstack, so we could call obstack_free
8706 here. We don't do that because the waste is small,
8707 and will be cleaned up when we're done with this
8708 compilation unit. This way, we're also more robust
8709 against other users of the comp_unit_obstack. */
8712 info_ptr
+= bytes_read
;
8713 last_die
= parent_die
;
8714 parent_die
= parent_die
->die_parent
;
8718 /* Check for template arguments. We never save these; if
8719 they're seen, we just mark the parent, and go on our way. */
8720 if (parent_die
!= NULL
8721 && cu
->language
== language_cplus
8722 && (abbrev
->tag
== DW_TAG_template_type_param
8723 || abbrev
->tag
== DW_TAG_template_value_param
))
8725 parent_die
->has_template_arguments
= 1;
8729 /* We don't need a partial DIE for the template argument. */
8730 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
,
8736 /* We only recurse into subprograms looking for template arguments.
8737 Skip their other children. */
8739 && cu
->language
== language_cplus
8740 && parent_die
!= NULL
8741 && parent_die
->tag
== DW_TAG_subprogram
)
8743 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8747 /* Check whether this DIE is interesting enough to save. Normally
8748 we would not be interested in members here, but there may be
8749 later variables referencing them via DW_AT_specification (for
8752 && !is_type_tag_for_partial (abbrev
->tag
)
8753 && abbrev
->tag
!= DW_TAG_constant
8754 && abbrev
->tag
!= DW_TAG_enumerator
8755 && abbrev
->tag
!= DW_TAG_subprogram
8756 && abbrev
->tag
!= DW_TAG_lexical_block
8757 && abbrev
->tag
!= DW_TAG_variable
8758 && abbrev
->tag
!= DW_TAG_namespace
8759 && abbrev
->tag
!= DW_TAG_module
8760 && abbrev
->tag
!= DW_TAG_member
)
8762 /* Otherwise we skip to the next sibling, if any. */
8763 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8767 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
8768 buffer
, info_ptr
, cu
);
8770 /* This two-pass algorithm for processing partial symbols has a
8771 high cost in cache pressure. Thus, handle some simple cases
8772 here which cover the majority of C partial symbols. DIEs
8773 which neither have specification tags in them, nor could have
8774 specification tags elsewhere pointing at them, can simply be
8775 processed and discarded.
8777 This segment is also optional; scan_partial_symbols and
8778 add_partial_symbol will handle these DIEs if we chain
8779 them in normally. When compilers which do not emit large
8780 quantities of duplicate debug information are more common,
8781 this code can probably be removed. */
8783 /* Any complete simple types at the top level (pretty much all
8784 of them, for a language without namespaces), can be processed
8786 if (parent_die
== NULL
8787 && part_die
->has_specification
== 0
8788 && part_die
->is_declaration
== 0
8789 && (part_die
->tag
== DW_TAG_typedef
8790 || part_die
->tag
== DW_TAG_base_type
8791 || part_die
->tag
== DW_TAG_subrange_type
))
8793 if (building_psymtab
&& part_die
->name
!= NULL
)
8794 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8795 VAR_DOMAIN
, LOC_TYPEDEF
,
8796 &cu
->objfile
->static_psymbols
,
8797 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8798 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8802 /* If we're at the second level, and we're an enumerator, and
8803 our parent has no specification (meaning possibly lives in a
8804 namespace elsewhere), then we can add the partial symbol now
8805 instead of queueing it. */
8806 if (part_die
->tag
== DW_TAG_enumerator
8807 && parent_die
!= NULL
8808 && parent_die
->die_parent
== NULL
8809 && parent_die
->tag
== DW_TAG_enumeration_type
8810 && parent_die
->has_specification
== 0)
8812 if (part_die
->name
== NULL
)
8813 complaint (&symfile_complaints
,
8814 _("malformed enumerator DIE ignored"));
8815 else if (building_psymtab
)
8816 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8817 VAR_DOMAIN
, LOC_CONST
,
8818 (cu
->language
== language_cplus
8819 || cu
->language
== language_java
)
8820 ? &cu
->objfile
->global_psymbols
8821 : &cu
->objfile
->static_psymbols
,
8822 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8824 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8828 /* We'll save this DIE so link it in. */
8829 part_die
->die_parent
= parent_die
;
8830 part_die
->die_sibling
= NULL
;
8831 part_die
->die_child
= NULL
;
8833 if (last_die
&& last_die
== parent_die
)
8834 last_die
->die_child
= part_die
;
8836 last_die
->die_sibling
= part_die
;
8838 last_die
= part_die
;
8840 if (first_die
== NULL
)
8841 first_die
= part_die
;
8843 /* Maybe add the DIE to the hash table. Not all DIEs that we
8844 find interesting need to be in the hash table, because we
8845 also have the parent/sibling/child chains; only those that we
8846 might refer to by offset later during partial symbol reading.
8848 For now this means things that might have be the target of a
8849 DW_AT_specification, DW_AT_abstract_origin, or
8850 DW_AT_extension. DW_AT_extension will refer only to
8851 namespaces; DW_AT_abstract_origin refers to functions (and
8852 many things under the function DIE, but we do not recurse
8853 into function DIEs during partial symbol reading) and
8854 possibly variables as well; DW_AT_specification refers to
8855 declarations. Declarations ought to have the DW_AT_declaration
8856 flag. It happens that GCC forgets to put it in sometimes, but
8857 only for functions, not for types.
8859 Adding more things than necessary to the hash table is harmless
8860 except for the performance cost. Adding too few will result in
8861 wasted time in find_partial_die, when we reread the compilation
8862 unit with load_all_dies set. */
8865 || abbrev
->tag
== DW_TAG_constant
8866 || abbrev
->tag
== DW_TAG_subprogram
8867 || abbrev
->tag
== DW_TAG_variable
8868 || abbrev
->tag
== DW_TAG_namespace
8869 || part_die
->is_declaration
)
8873 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
8874 part_die
->offset
, INSERT
);
8878 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8879 sizeof (struct partial_die_info
));
8881 /* For some DIEs we want to follow their children (if any). For C
8882 we have no reason to follow the children of structures; for other
8883 languages we have to, so that we can get at method physnames
8884 to infer fully qualified class names, for DW_AT_specification,
8885 and for C++ template arguments. For C++, we also look one level
8886 inside functions to find template arguments (if the name of the
8887 function does not already contain the template arguments).
8889 For Ada, we need to scan the children of subprograms and lexical
8890 blocks as well because Ada allows the definition of nested
8891 entities that could be interesting for the debugger, such as
8892 nested subprograms for instance. */
8893 if (last_die
->has_children
8895 || last_die
->tag
== DW_TAG_namespace
8896 || last_die
->tag
== DW_TAG_module
8897 || last_die
->tag
== DW_TAG_enumeration_type
8898 || (cu
->language
== language_cplus
8899 && last_die
->tag
== DW_TAG_subprogram
8900 && (last_die
->name
== NULL
8901 || strchr (last_die
->name
, '<') == NULL
))
8902 || (cu
->language
!= language_c
8903 && (last_die
->tag
== DW_TAG_class_type
8904 || last_die
->tag
== DW_TAG_interface_type
8905 || last_die
->tag
== DW_TAG_structure_type
8906 || last_die
->tag
== DW_TAG_union_type
))
8907 || (cu
->language
== language_ada
8908 && (last_die
->tag
== DW_TAG_subprogram
8909 || last_die
->tag
== DW_TAG_lexical_block
))))
8912 parent_die
= last_die
;
8916 /* Otherwise we skip to the next sibling, if any. */
8917 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
8919 /* Back to the top, do it again. */
8923 /* Read a minimal amount of information into the minimal die structure. */
8926 read_partial_die (struct partial_die_info
*part_die
,
8927 struct abbrev_info
*abbrev
,
8928 unsigned int abbrev_len
, bfd
*abfd
,
8929 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8930 struct dwarf2_cu
*cu
)
8933 struct attribute attr
;
8934 int has_low_pc_attr
= 0;
8935 int has_high_pc_attr
= 0;
8937 memset (part_die
, 0, sizeof (struct partial_die_info
));
8939 part_die
->offset
= info_ptr
- buffer
;
8941 info_ptr
+= abbrev_len
;
8946 part_die
->tag
= abbrev
->tag
;
8947 part_die
->has_children
= abbrev
->has_children
;
8949 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8951 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
8953 /* Store the data if it is of an attribute we want to keep in a
8954 partial symbol table. */
8958 switch (part_die
->tag
)
8960 case DW_TAG_compile_unit
:
8961 case DW_TAG_type_unit
:
8962 /* Compilation units have a DW_AT_name that is a filename, not
8963 a source language identifier. */
8964 case DW_TAG_enumeration_type
:
8965 case DW_TAG_enumerator
:
8966 /* These tags always have simple identifiers already; no need
8967 to canonicalize them. */
8968 part_die
->name
= DW_STRING (&attr
);
8972 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
8973 &cu
->objfile
->objfile_obstack
);
8977 case DW_AT_linkage_name
:
8978 case DW_AT_MIPS_linkage_name
:
8979 /* Note that both forms of linkage name might appear. We
8980 assume they will be the same, and we only store the last
8982 if (cu
->language
== language_ada
)
8983 part_die
->name
= DW_STRING (&attr
);
8984 part_die
->linkage_name
= DW_STRING (&attr
);
8987 has_low_pc_attr
= 1;
8988 part_die
->lowpc
= DW_ADDR (&attr
);
8991 has_high_pc_attr
= 1;
8992 part_die
->highpc
= DW_ADDR (&attr
);
8994 case DW_AT_location
:
8995 /* Support the .debug_loc offsets. */
8996 if (attr_form_is_block (&attr
))
8998 part_die
->locdesc
= DW_BLOCK (&attr
);
9000 else if (attr_form_is_section_offset (&attr
))
9002 dwarf2_complex_location_expr_complaint ();
9006 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
9007 "partial symbol information");
9010 case DW_AT_external
:
9011 part_die
->is_external
= DW_UNSND (&attr
);
9013 case DW_AT_declaration
:
9014 part_die
->is_declaration
= DW_UNSND (&attr
);
9017 part_die
->has_type
= 1;
9019 case DW_AT_abstract_origin
:
9020 case DW_AT_specification
:
9021 case DW_AT_extension
:
9022 part_die
->has_specification
= 1;
9023 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
9026 /* Ignore absolute siblings, they might point outside of
9027 the current compile unit. */
9028 if (attr
.form
== DW_FORM_ref_addr
)
9029 complaint (&symfile_complaints
,
9030 _("ignoring absolute DW_AT_sibling"));
9032 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
9034 case DW_AT_byte_size
:
9035 part_die
->has_byte_size
= 1;
9037 case DW_AT_calling_convention
:
9038 /* DWARF doesn't provide a way to identify a program's source-level
9039 entry point. DW_AT_calling_convention attributes are only meant
9040 to describe functions' calling conventions.
9042 However, because it's a necessary piece of information in
9043 Fortran, and because DW_CC_program is the only piece of debugging
9044 information whose definition refers to a 'main program' at all,
9045 several compilers have begun marking Fortran main programs with
9046 DW_CC_program --- even when those functions use the standard
9047 calling conventions.
9049 So until DWARF specifies a way to provide this information and
9050 compilers pick up the new representation, we'll support this
9052 if (DW_UNSND (&attr
) == DW_CC_program
9053 && cu
->language
== language_fortran
)
9055 set_main_name (part_die
->name
);
9057 /* As this DIE has a static linkage the name would be difficult
9058 to look up later. */
9059 language_of_main
= language_fortran
;
9067 /* When using the GNU linker, .gnu.linkonce. sections are used to
9068 eliminate duplicate copies of functions and vtables and such.
9069 The linker will arbitrarily choose one and discard the others.
9070 The AT_*_pc values for such functions refer to local labels in
9071 these sections. If the section from that file was discarded, the
9072 labels are not in the output, so the relocs get a value of 0.
9073 If this is a discarded function, mark the pc bounds as invalid,
9074 so that GDB will ignore it. */
9075 if (has_low_pc_attr
&& has_high_pc_attr
9076 && part_die
->lowpc
< part_die
->highpc
9077 && (part_die
->lowpc
!= 0
9078 || dwarf2_per_objfile
->has_section_at_zero
))
9079 part_die
->has_pc_info
= 1;
9084 /* Find a cached partial DIE at OFFSET in CU. */
9086 static struct partial_die_info
*
9087 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
9089 struct partial_die_info
*lookup_die
= NULL
;
9090 struct partial_die_info part_die
;
9092 part_die
.offset
= offset
;
9093 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
9098 /* Find a partial DIE at OFFSET, which may or may not be in CU,
9099 except in the case of .debug_types DIEs which do not reference
9100 outside their CU (they do however referencing other types via
9103 static struct partial_die_info
*
9104 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
9106 struct dwarf2_per_cu_data
*per_cu
= NULL
;
9107 struct partial_die_info
*pd
= NULL
;
9109 if (cu
->per_cu
->from_debug_types
)
9111 pd
= find_partial_die_in_comp_unit (offset
, cu
);
9117 if (offset_in_cu_p (&cu
->header
, offset
))
9119 pd
= find_partial_die_in_comp_unit (offset
, cu
);
9124 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
9126 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
9127 load_partial_comp_unit (per_cu
, cu
->objfile
);
9129 per_cu
->cu
->last_used
= 0;
9130 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
9132 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
9134 struct cleanup
*back_to
;
9135 struct partial_die_info comp_unit_die
;
9136 struct abbrev_info
*abbrev
;
9137 unsigned int bytes_read
;
9140 per_cu
->load_all_dies
= 1;
9142 /* Re-read the DIEs. */
9143 back_to
= make_cleanup (null_cleanup
, 0);
9144 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
9146 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
9147 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
9149 info_ptr
= (dwarf2_per_objfile
->info
.buffer
9150 + per_cu
->cu
->header
.offset
9151 + per_cu
->cu
->header
.first_die_offset
);
9152 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
9153 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
9154 per_cu
->cu
->objfile
->obfd
,
9155 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
9157 if (comp_unit_die
.has_children
)
9158 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
9159 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
9161 do_cleanups (back_to
);
9163 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
9169 internal_error (__FILE__
, __LINE__
,
9170 _("could not find partial DIE 0x%x "
9171 "in cache [from module %s]\n"),
9172 offset
, bfd_get_filename (cu
->objfile
->obfd
));
9176 /* See if we can figure out if the class lives in a namespace. We do
9177 this by looking for a member function; its demangled name will
9178 contain namespace info, if there is any. */
9181 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
9182 struct dwarf2_cu
*cu
)
9184 /* NOTE: carlton/2003-10-07: Getting the info this way changes
9185 what template types look like, because the demangler
9186 frequently doesn't give the same name as the debug info. We
9187 could fix this by only using the demangled name to get the
9188 prefix (but see comment in read_structure_type). */
9190 struct partial_die_info
*real_pdi
;
9191 struct partial_die_info
*child_pdi
;
9193 /* If this DIE (this DIE's specification, if any) has a parent, then
9194 we should not do this. We'll prepend the parent's fully qualified
9195 name when we create the partial symbol. */
9197 real_pdi
= struct_pdi
;
9198 while (real_pdi
->has_specification
)
9199 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
9201 if (real_pdi
->die_parent
!= NULL
)
9204 for (child_pdi
= struct_pdi
->die_child
;
9206 child_pdi
= child_pdi
->die_sibling
)
9208 if (child_pdi
->tag
== DW_TAG_subprogram
9209 && child_pdi
->linkage_name
!= NULL
)
9211 char *actual_class_name
9212 = language_class_name_from_physname (cu
->language_defn
,
9213 child_pdi
->linkage_name
);
9214 if (actual_class_name
!= NULL
)
9217 = obsavestring (actual_class_name
,
9218 strlen (actual_class_name
),
9219 &cu
->objfile
->objfile_obstack
);
9220 xfree (actual_class_name
);
9227 /* Adjust PART_DIE before generating a symbol for it. This function
9228 may set the is_external flag or change the DIE's name. */
9231 fixup_partial_die (struct partial_die_info
*part_die
,
9232 struct dwarf2_cu
*cu
)
9234 /* Once we've fixed up a die, there's no point in doing so again.
9235 This also avoids a memory leak if we were to call
9236 guess_partial_die_structure_name multiple times. */
9237 if (part_die
->fixup_called
)
9240 /* If we found a reference attribute and the DIE has no name, try
9241 to find a name in the referred to DIE. */
9243 if (part_die
->name
== NULL
&& part_die
->has_specification
)
9245 struct partial_die_info
*spec_die
;
9247 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
9249 fixup_partial_die (spec_die
, cu
);
9253 part_die
->name
= spec_die
->name
;
9255 /* Copy DW_AT_external attribute if it is set. */
9256 if (spec_die
->is_external
)
9257 part_die
->is_external
= spec_die
->is_external
;
9261 /* Set default names for some unnamed DIEs. */
9263 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
9264 part_die
->name
= "(anonymous namespace)";
9266 /* If there is no parent die to provide a namespace, and there are
9267 children, see if we can determine the namespace from their linkage
9269 NOTE: We need to do this even if cu->has_namespace_info != 0.
9270 gcc-4.5 -gdwarf-4 can drop the enclosing namespace. */
9271 if (cu
->language
== language_cplus
9272 && dwarf2_per_objfile
->types
.asection
!= NULL
9273 && part_die
->die_parent
== NULL
9274 && part_die
->has_children
9275 && (part_die
->tag
== DW_TAG_class_type
9276 || part_die
->tag
== DW_TAG_structure_type
9277 || part_die
->tag
== DW_TAG_union_type
))
9278 guess_partial_die_structure_name (part_die
, cu
);
9280 part_die
->fixup_called
= 1;
9283 /* Read an attribute value described by an attribute form. */
9286 read_attribute_value (struct attribute
*attr
, unsigned form
,
9287 bfd
*abfd
, gdb_byte
*info_ptr
,
9288 struct dwarf2_cu
*cu
)
9290 struct comp_unit_head
*cu_header
= &cu
->header
;
9291 unsigned int bytes_read
;
9292 struct dwarf_block
*blk
;
9297 case DW_FORM_ref_addr
:
9298 if (cu
->header
.version
== 2)
9299 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9301 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
,
9302 &cu
->header
, &bytes_read
);
9303 info_ptr
+= bytes_read
;
9306 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9307 info_ptr
+= bytes_read
;
9309 case DW_FORM_block2
:
9310 blk
= dwarf_alloc_block (cu
);
9311 blk
->size
= read_2_bytes (abfd
, info_ptr
);
9313 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9314 info_ptr
+= blk
->size
;
9315 DW_BLOCK (attr
) = blk
;
9317 case DW_FORM_block4
:
9318 blk
= dwarf_alloc_block (cu
);
9319 blk
->size
= read_4_bytes (abfd
, info_ptr
);
9321 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9322 info_ptr
+= blk
->size
;
9323 DW_BLOCK (attr
) = blk
;
9326 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
9330 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
9334 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
9337 case DW_FORM_sec_offset
:
9338 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9339 info_ptr
+= bytes_read
;
9341 case DW_FORM_string
:
9342 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
9343 DW_STRING_IS_CANONICAL (attr
) = 0;
9344 info_ptr
+= bytes_read
;
9347 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
9349 DW_STRING_IS_CANONICAL (attr
) = 0;
9350 info_ptr
+= bytes_read
;
9352 case DW_FORM_exprloc
:
9354 blk
= dwarf_alloc_block (cu
);
9355 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9356 info_ptr
+= bytes_read
;
9357 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9358 info_ptr
+= blk
->size
;
9359 DW_BLOCK (attr
) = blk
;
9361 case DW_FORM_block1
:
9362 blk
= dwarf_alloc_block (cu
);
9363 blk
->size
= read_1_byte (abfd
, info_ptr
);
9365 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9366 info_ptr
+= blk
->size
;
9367 DW_BLOCK (attr
) = blk
;
9370 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9374 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9377 case DW_FORM_flag_present
:
9378 DW_UNSND (attr
) = 1;
9381 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
9382 info_ptr
+= bytes_read
;
9385 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9386 info_ptr
+= bytes_read
;
9389 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
9393 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
9397 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
9401 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
9405 /* Convert the signature to something we can record in DW_UNSND
9407 NOTE: This is NULL if the type wasn't found. */
9408 DW_SIGNATURED_TYPE (attr
) =
9409 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
9412 case DW_FORM_ref_udata
:
9413 DW_ADDR (attr
) = (cu
->header
.offset
9414 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
9415 info_ptr
+= bytes_read
;
9417 case DW_FORM_indirect
:
9418 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9419 info_ptr
+= bytes_read
;
9420 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
9423 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
9424 dwarf_form_name (form
),
9425 bfd_get_filename (abfd
));
9428 /* We have seen instances where the compiler tried to emit a byte
9429 size attribute of -1 which ended up being encoded as an unsigned
9430 0xffffffff. Although 0xffffffff is technically a valid size value,
9431 an object of this size seems pretty unlikely so we can relatively
9432 safely treat these cases as if the size attribute was invalid and
9433 treat them as zero by default. */
9434 if (attr
->name
== DW_AT_byte_size
9435 && form
== DW_FORM_data4
9436 && DW_UNSND (attr
) >= 0xffffffff)
9439 (&symfile_complaints
,
9440 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
9441 hex_string (DW_UNSND (attr
)));
9442 DW_UNSND (attr
) = 0;
9448 /* Read an attribute described by an abbreviated attribute. */
9451 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
9452 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
9454 attr
->name
= abbrev
->name
;
9455 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
9458 /* Read dwarf information from a buffer. */
9461 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
9463 return bfd_get_8 (abfd
, buf
);
9467 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
9469 return bfd_get_signed_8 (abfd
, buf
);
9473 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
9475 return bfd_get_16 (abfd
, buf
);
9479 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9481 return bfd_get_signed_16 (abfd
, buf
);
9485 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
9487 return bfd_get_32 (abfd
, buf
);
9491 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9493 return bfd_get_signed_32 (abfd
, buf
);
9497 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
9499 return bfd_get_64 (abfd
, buf
);
9503 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
9504 unsigned int *bytes_read
)
9506 struct comp_unit_head
*cu_header
= &cu
->header
;
9507 CORE_ADDR retval
= 0;
9509 if (cu_header
->signed_addr_p
)
9511 switch (cu_header
->addr_size
)
9514 retval
= bfd_get_signed_16 (abfd
, buf
);
9517 retval
= bfd_get_signed_32 (abfd
, buf
);
9520 retval
= bfd_get_signed_64 (abfd
, buf
);
9523 internal_error (__FILE__
, __LINE__
,
9524 _("read_address: bad switch, signed [in module %s]"),
9525 bfd_get_filename (abfd
));
9530 switch (cu_header
->addr_size
)
9533 retval
= bfd_get_16 (abfd
, buf
);
9536 retval
= bfd_get_32 (abfd
, buf
);
9539 retval
= bfd_get_64 (abfd
, buf
);
9542 internal_error (__FILE__
, __LINE__
,
9543 _("read_address: bad switch, "
9544 "unsigned [in module %s]"),
9545 bfd_get_filename (abfd
));
9549 *bytes_read
= cu_header
->addr_size
;
9553 /* Read the initial length from a section. The (draft) DWARF 3
9554 specification allows the initial length to take up either 4 bytes
9555 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
9556 bytes describe the length and all offsets will be 8 bytes in length
9559 An older, non-standard 64-bit format is also handled by this
9560 function. The older format in question stores the initial length
9561 as an 8-byte quantity without an escape value. Lengths greater
9562 than 2^32 aren't very common which means that the initial 4 bytes
9563 is almost always zero. Since a length value of zero doesn't make
9564 sense for the 32-bit format, this initial zero can be considered to
9565 be an escape value which indicates the presence of the older 64-bit
9566 format. As written, the code can't detect (old format) lengths
9567 greater than 4GB. If it becomes necessary to handle lengths
9568 somewhat larger than 4GB, we could allow other small values (such
9569 as the non-sensical values of 1, 2, and 3) to also be used as
9570 escape values indicating the presence of the old format.
9572 The value returned via bytes_read should be used to increment the
9573 relevant pointer after calling read_initial_length().
9575 [ Note: read_initial_length() and read_offset() are based on the
9576 document entitled "DWARF Debugging Information Format", revision
9577 3, draft 8, dated November 19, 2001. This document was obtained
9580 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
9582 This document is only a draft and is subject to change. (So beware.)
9584 Details regarding the older, non-standard 64-bit format were
9585 determined empirically by examining 64-bit ELF files produced by
9586 the SGI toolchain on an IRIX 6.5 machine.
9588 - Kevin, July 16, 2002
9592 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
9594 LONGEST length
= bfd_get_32 (abfd
, buf
);
9596 if (length
== 0xffffffff)
9598 length
= bfd_get_64 (abfd
, buf
+ 4);
9601 else if (length
== 0)
9603 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
9604 length
= bfd_get_64 (abfd
, buf
);
9615 /* Cover function for read_initial_length.
9616 Returns the length of the object at BUF, and stores the size of the
9617 initial length in *BYTES_READ and stores the size that offsets will be in
9619 If the initial length size is not equivalent to that specified in
9620 CU_HEADER then issue a complaint.
9621 This is useful when reading non-comp-unit headers. */
9624 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
9625 const struct comp_unit_head
*cu_header
,
9626 unsigned int *bytes_read
,
9627 unsigned int *offset_size
)
9629 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
9631 gdb_assert (cu_header
->initial_length_size
== 4
9632 || cu_header
->initial_length_size
== 8
9633 || cu_header
->initial_length_size
== 12);
9635 if (cu_header
->initial_length_size
!= *bytes_read
)
9636 complaint (&symfile_complaints
,
9637 _("intermixed 32-bit and 64-bit DWARF sections"));
9639 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
9643 /* Read an offset from the data stream. The size of the offset is
9644 given by cu_header->offset_size. */
9647 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
9648 unsigned int *bytes_read
)
9650 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
9652 *bytes_read
= cu_header
->offset_size
;
9656 /* Read an offset from the data stream. */
9659 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
9663 switch (offset_size
)
9666 retval
= bfd_get_32 (abfd
, buf
);
9669 retval
= bfd_get_64 (abfd
, buf
);
9672 internal_error (__FILE__
, __LINE__
,
9673 _("read_offset_1: bad switch [in module %s]"),
9674 bfd_get_filename (abfd
));
9681 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
9683 /* If the size of a host char is 8 bits, we can return a pointer
9684 to the buffer, otherwise we have to copy the data to a buffer
9685 allocated on the temporary obstack. */
9686 gdb_assert (HOST_CHAR_BIT
== 8);
9691 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9693 /* If the size of a host char is 8 bits, we can return a pointer
9694 to the string, otherwise we have to copy the string to a buffer
9695 allocated on the temporary obstack. */
9696 gdb_assert (HOST_CHAR_BIT
== 8);
9699 *bytes_read_ptr
= 1;
9702 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
9703 return (char *) buf
;
9707 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
9708 const struct comp_unit_head
*cu_header
,
9709 unsigned int *bytes_read_ptr
)
9711 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
9713 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
9714 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
9716 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
9717 bfd_get_filename (abfd
));
9720 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
9722 error (_("DW_FORM_strp pointing outside of "
9723 ".debug_str section [in module %s]"),
9724 bfd_get_filename (abfd
));
9727 gdb_assert (HOST_CHAR_BIT
== 8);
9728 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
9730 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
9733 static unsigned long
9734 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9736 unsigned long result
;
9737 unsigned int num_read
;
9747 byte
= bfd_get_8 (abfd
, buf
);
9750 result
|= ((unsigned long)(byte
& 127) << shift
);
9751 if ((byte
& 128) == 0)
9757 *bytes_read_ptr
= num_read
;
9762 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9765 int i
, shift
, num_read
;
9774 byte
= bfd_get_8 (abfd
, buf
);
9777 result
|= ((long)(byte
& 127) << shift
);
9779 if ((byte
& 128) == 0)
9784 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
9785 result
|= -(((long)1) << shift
);
9786 *bytes_read_ptr
= num_read
;
9790 /* Return a pointer to just past the end of an LEB128 number in BUF. */
9793 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
9799 byte
= bfd_get_8 (abfd
, buf
);
9801 if ((byte
& 128) == 0)
9807 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
9814 cu
->language
= language_c
;
9816 case DW_LANG_C_plus_plus
:
9817 cu
->language
= language_cplus
;
9820 cu
->language
= language_d
;
9822 case DW_LANG_Fortran77
:
9823 case DW_LANG_Fortran90
:
9824 case DW_LANG_Fortran95
:
9825 cu
->language
= language_fortran
;
9827 case DW_LANG_Mips_Assembler
:
9828 cu
->language
= language_asm
;
9831 cu
->language
= language_java
;
9835 cu
->language
= language_ada
;
9837 case DW_LANG_Modula2
:
9838 cu
->language
= language_m2
;
9840 case DW_LANG_Pascal83
:
9841 cu
->language
= language_pascal
;
9844 cu
->language
= language_objc
;
9846 case DW_LANG_Cobol74
:
9847 case DW_LANG_Cobol85
:
9849 cu
->language
= language_minimal
;
9852 cu
->language_defn
= language_def (cu
->language
);
9855 /* Return the named attribute or NULL if not there. */
9857 static struct attribute
*
9858 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
9861 struct attribute
*spec
= NULL
;
9863 for (i
= 0; i
< die
->num_attrs
; ++i
)
9865 if (die
->attrs
[i
].name
== name
)
9866 return &die
->attrs
[i
];
9867 if (die
->attrs
[i
].name
== DW_AT_specification
9868 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
9869 spec
= &die
->attrs
[i
];
9874 die
= follow_die_ref (die
, spec
, &cu
);
9875 return dwarf2_attr (die
, name
, cu
);
9881 /* Return the named attribute or NULL if not there,
9882 but do not follow DW_AT_specification, etc.
9883 This is for use in contexts where we're reading .debug_types dies.
9884 Following DW_AT_specification, DW_AT_abstract_origin will take us
9885 back up the chain, and we want to go down. */
9887 static struct attribute
*
9888 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
9889 struct dwarf2_cu
*cu
)
9893 for (i
= 0; i
< die
->num_attrs
; ++i
)
9894 if (die
->attrs
[i
].name
== name
)
9895 return &die
->attrs
[i
];
9900 /* Return non-zero iff the attribute NAME is defined for the given DIE,
9901 and holds a non-zero value. This function should only be used for
9902 DW_FORM_flag or DW_FORM_flag_present attributes. */
9905 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
9907 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
9909 return (attr
&& DW_UNSND (attr
));
9913 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
9915 /* A DIE is a declaration if it has a DW_AT_declaration attribute
9916 which value is non-zero. However, we have to be careful with
9917 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
9918 (via dwarf2_flag_true_p) follows this attribute. So we may
9919 end up accidently finding a declaration attribute that belongs
9920 to a different DIE referenced by the specification attribute,
9921 even though the given DIE does not have a declaration attribute. */
9922 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
9923 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
9926 /* Return the die giving the specification for DIE, if there is
9927 one. *SPEC_CU is the CU containing DIE on input, and the CU
9928 containing the return value on output. If there is no
9929 specification, but there is an abstract origin, that is
9932 static struct die_info
*
9933 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
9935 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
9938 if (spec_attr
== NULL
)
9939 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
9941 if (spec_attr
== NULL
)
9944 return follow_die_ref (die
, spec_attr
, spec_cu
);
9947 /* Free the line_header structure *LH, and any arrays and strings it
9949 NOTE: This is also used as a "cleanup" function. */
9952 free_line_header (struct line_header
*lh
)
9954 if (lh
->standard_opcode_lengths
)
9955 xfree (lh
->standard_opcode_lengths
);
9957 /* Remember that all the lh->file_names[i].name pointers are
9958 pointers into debug_line_buffer, and don't need to be freed. */
9960 xfree (lh
->file_names
);
9962 /* Similarly for the include directory names. */
9963 if (lh
->include_dirs
)
9964 xfree (lh
->include_dirs
);
9969 /* Add an entry to LH's include directory table. */
9972 add_include_dir (struct line_header
*lh
, char *include_dir
)
9974 /* Grow the array if necessary. */
9975 if (lh
->include_dirs_size
== 0)
9977 lh
->include_dirs_size
= 1; /* for testing */
9978 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
9979 * sizeof (*lh
->include_dirs
));
9981 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
9983 lh
->include_dirs_size
*= 2;
9984 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
9985 (lh
->include_dirs_size
9986 * sizeof (*lh
->include_dirs
)));
9989 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
9992 /* Add an entry to LH's file name table. */
9995 add_file_name (struct line_header
*lh
,
9997 unsigned int dir_index
,
9998 unsigned int mod_time
,
9999 unsigned int length
)
10001 struct file_entry
*fe
;
10003 /* Grow the array if necessary. */
10004 if (lh
->file_names_size
== 0)
10006 lh
->file_names_size
= 1; /* for testing */
10007 lh
->file_names
= xmalloc (lh
->file_names_size
10008 * sizeof (*lh
->file_names
));
10010 else if (lh
->num_file_names
>= lh
->file_names_size
)
10012 lh
->file_names_size
*= 2;
10013 lh
->file_names
= xrealloc (lh
->file_names
,
10014 (lh
->file_names_size
10015 * sizeof (*lh
->file_names
)));
10018 fe
= &lh
->file_names
[lh
->num_file_names
++];
10020 fe
->dir_index
= dir_index
;
10021 fe
->mod_time
= mod_time
;
10022 fe
->length
= length
;
10023 fe
->included_p
= 0;
10027 /* Read the statement program header starting at OFFSET in
10028 .debug_line, according to the endianness of ABFD. Return a pointer
10029 to a struct line_header, allocated using xmalloc.
10031 NOTE: the strings in the include directory and file name tables of
10032 the returned object point into debug_line_buffer, and must not be
10035 static struct line_header
*
10036 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
10037 struct dwarf2_cu
*cu
)
10039 struct cleanup
*back_to
;
10040 struct line_header
*lh
;
10041 gdb_byte
*line_ptr
;
10042 unsigned int bytes_read
, offset_size
;
10044 char *cur_dir
, *cur_file
;
10046 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
10047 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
10049 complaint (&symfile_complaints
, _("missing .debug_line section"));
10053 /* Make sure that at least there's room for the total_length field.
10054 That could be 12 bytes long, but we're just going to fudge that. */
10055 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
10057 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10061 lh
= xmalloc (sizeof (*lh
));
10062 memset (lh
, 0, sizeof (*lh
));
10063 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
10066 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
10068 /* Read in the header. */
10070 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
10071 &bytes_read
, &offset_size
);
10072 line_ptr
+= bytes_read
;
10073 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
10074 + dwarf2_per_objfile
->line
.size
))
10076 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10079 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
10080 lh
->version
= read_2_bytes (abfd
, line_ptr
);
10082 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
10083 line_ptr
+= offset_size
;
10084 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
10086 if (lh
->version
>= 4)
10088 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
10092 lh
->maximum_ops_per_instruction
= 1;
10094 if (lh
->maximum_ops_per_instruction
== 0)
10096 lh
->maximum_ops_per_instruction
= 1;
10097 complaint (&symfile_complaints
,
10098 _("invalid maximum_ops_per_instruction "
10099 "in `.debug_line' section"));
10102 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
10104 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
10106 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
10108 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
10110 lh
->standard_opcode_lengths
10111 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
10113 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
10114 for (i
= 1; i
< lh
->opcode_base
; ++i
)
10116 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
10120 /* Read directory table. */
10121 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
10123 line_ptr
+= bytes_read
;
10124 add_include_dir (lh
, cur_dir
);
10126 line_ptr
+= bytes_read
;
10128 /* Read file name table. */
10129 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
10131 unsigned int dir_index
, mod_time
, length
;
10133 line_ptr
+= bytes_read
;
10134 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10135 line_ptr
+= bytes_read
;
10136 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10137 line_ptr
+= bytes_read
;
10138 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10139 line_ptr
+= bytes_read
;
10141 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10143 line_ptr
+= bytes_read
;
10144 lh
->statement_program_start
= line_ptr
;
10146 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
10147 + dwarf2_per_objfile
->line
.size
))
10148 complaint (&symfile_complaints
,
10149 _("line number info header doesn't "
10150 "fit in `.debug_line' section"));
10152 discard_cleanups (back_to
);
10156 /* This function exists to work around a bug in certain compilers
10157 (particularly GCC 2.95), in which the first line number marker of a
10158 function does not show up until after the prologue, right before
10159 the second line number marker. This function shifts ADDRESS down
10160 to the beginning of the function if necessary, and is called on
10161 addresses passed to record_line. */
10164 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
10166 struct function_range
*fn
;
10168 /* Find the function_range containing address. */
10172 if (!cu
->cached_fn
)
10173 cu
->cached_fn
= cu
->first_fn
;
10175 fn
= cu
->cached_fn
;
10177 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
10183 while (fn
&& fn
!= cu
->cached_fn
)
10184 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
10194 if (address
!= fn
->lowpc
)
10195 complaint (&symfile_complaints
,
10196 _("misplaced first line number at 0x%lx for '%s'"),
10197 (unsigned long) address
, fn
->name
);
10202 /* Subroutine of dwarf_decode_lines to simplify it.
10203 Return the file name of the psymtab for included file FILE_INDEX
10204 in line header LH of PST.
10205 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10206 If space for the result is malloc'd, it will be freed by a cleanup.
10207 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
10210 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
10211 const struct partial_symtab
*pst
,
10212 const char *comp_dir
)
10214 const struct file_entry fe
= lh
->file_names
[file_index
];
10215 char *include_name
= fe
.name
;
10216 char *include_name_to_compare
= include_name
;
10217 char *dir_name
= NULL
;
10218 const char *pst_filename
;
10219 char *copied_name
= NULL
;
10223 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
10225 if (!IS_ABSOLUTE_PATH (include_name
)
10226 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
10228 /* Avoid creating a duplicate psymtab for PST.
10229 We do this by comparing INCLUDE_NAME and PST_FILENAME.
10230 Before we do the comparison, however, we need to account
10231 for DIR_NAME and COMP_DIR.
10232 First prepend dir_name (if non-NULL). If we still don't
10233 have an absolute path prepend comp_dir (if non-NULL).
10234 However, the directory we record in the include-file's
10235 psymtab does not contain COMP_DIR (to match the
10236 corresponding symtab(s)).
10241 bash$ gcc -g ./hello.c
10242 include_name = "hello.c"
10244 DW_AT_comp_dir = comp_dir = "/tmp"
10245 DW_AT_name = "./hello.c" */
10247 if (dir_name
!= NULL
)
10249 include_name
= concat (dir_name
, SLASH_STRING
,
10250 include_name
, (char *)NULL
);
10251 include_name_to_compare
= include_name
;
10252 make_cleanup (xfree
, include_name
);
10254 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
10256 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
10257 include_name
, (char *)NULL
);
10261 pst_filename
= pst
->filename
;
10262 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
10264 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
10265 pst_filename
, (char *)NULL
);
10266 pst_filename
= copied_name
;
10269 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
10271 if (include_name_to_compare
!= include_name
)
10272 xfree (include_name_to_compare
);
10273 if (copied_name
!= NULL
)
10274 xfree (copied_name
);
10278 return include_name
;
10281 /* Decode the Line Number Program (LNP) for the given line_header
10282 structure and CU. The actual information extracted and the type
10283 of structures created from the LNP depends on the value of PST.
10285 1. If PST is NULL, then this procedure uses the data from the program
10286 to create all necessary symbol tables, and their linetables.
10288 2. If PST is not NULL, this procedure reads the program to determine
10289 the list of files included by the unit represented by PST, and
10290 builds all the associated partial symbol tables.
10292 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10293 It is used for relative paths in the line table.
10294 NOTE: When processing partial symtabs (pst != NULL),
10295 comp_dir == pst->dirname.
10297 NOTE: It is important that psymtabs have the same file name (via strcmp)
10298 as the corresponding symtab. Since COMP_DIR is not used in the name of the
10299 symtab we don't use it in the name of the psymtabs we create.
10300 E.g. expand_line_sal requires this when finding psymtabs to expand.
10301 A good testcase for this is mb-inline.exp. */
10304 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
, bfd
*abfd
,
10305 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
10307 gdb_byte
*line_ptr
, *extended_end
;
10308 gdb_byte
*line_end
;
10309 unsigned int bytes_read
, extended_len
;
10310 unsigned char op_code
, extended_op
, adj_opcode
;
10311 CORE_ADDR baseaddr
;
10312 struct objfile
*objfile
= cu
->objfile
;
10313 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10314 const int decode_for_pst_p
= (pst
!= NULL
);
10315 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
10317 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10319 line_ptr
= lh
->statement_program_start
;
10320 line_end
= lh
->statement_program_end
;
10322 /* Read the statement sequences until there's nothing left. */
10323 while (line_ptr
< line_end
)
10325 /* state machine registers */
10326 CORE_ADDR address
= 0;
10327 unsigned int file
= 1;
10328 unsigned int line
= 1;
10329 unsigned int column
= 0;
10330 int is_stmt
= lh
->default_is_stmt
;
10331 int basic_block
= 0;
10332 int end_sequence
= 0;
10334 unsigned char op_index
= 0;
10336 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
10338 /* Start a subfile for the current file of the state machine. */
10339 /* lh->include_dirs and lh->file_names are 0-based, but the
10340 directory and file name numbers in the statement program
10342 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10346 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10348 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10351 /* Decode the table. */
10352 while (!end_sequence
)
10354 op_code
= read_1_byte (abfd
, line_ptr
);
10356 if (line_ptr
> line_end
)
10358 dwarf2_debug_line_missing_end_sequence_complaint ();
10362 if (op_code
>= lh
->opcode_base
)
10364 /* Special operand. */
10365 adj_opcode
= op_code
- lh
->opcode_base
;
10366 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
10367 / lh
->maximum_ops_per_instruction
)
10368 * lh
->minimum_instruction_length
);
10369 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
10370 % lh
->maximum_ops_per_instruction
);
10371 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
10372 if (lh
->num_file_names
< file
|| file
== 0)
10373 dwarf2_debug_line_missing_file_complaint ();
10374 /* For now we ignore lines not starting on an
10375 instruction boundary. */
10376 else if (op_index
== 0)
10378 lh
->file_names
[file
- 1].included_p
= 1;
10379 if (!decode_for_pst_p
&& is_stmt
)
10381 if (last_subfile
!= current_subfile
)
10383 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10385 record_line (last_subfile
, 0, addr
);
10386 last_subfile
= current_subfile
;
10388 /* Append row to matrix using current values. */
10389 addr
= check_cu_functions (address
, cu
);
10390 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10391 record_line (current_subfile
, line
, addr
);
10396 else switch (op_code
)
10398 case DW_LNS_extended_op
:
10399 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
10401 line_ptr
+= bytes_read
;
10402 extended_end
= line_ptr
+ extended_len
;
10403 extended_op
= read_1_byte (abfd
, line_ptr
);
10405 switch (extended_op
)
10407 case DW_LNE_end_sequence
:
10410 case DW_LNE_set_address
:
10411 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
10413 line_ptr
+= bytes_read
;
10414 address
+= baseaddr
;
10416 case DW_LNE_define_file
:
10419 unsigned int dir_index
, mod_time
, length
;
10421 cur_file
= read_direct_string (abfd
, line_ptr
,
10423 line_ptr
+= bytes_read
;
10425 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10426 line_ptr
+= bytes_read
;
10428 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10429 line_ptr
+= bytes_read
;
10431 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10432 line_ptr
+= bytes_read
;
10433 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10436 case DW_LNE_set_discriminator
:
10437 /* The discriminator is not interesting to the debugger;
10439 line_ptr
= extended_end
;
10442 complaint (&symfile_complaints
,
10443 _("mangled .debug_line section"));
10446 /* Make sure that we parsed the extended op correctly. If e.g.
10447 we expected a different address size than the producer used,
10448 we may have read the wrong number of bytes. */
10449 if (line_ptr
!= extended_end
)
10451 complaint (&symfile_complaints
,
10452 _("mangled .debug_line section"));
10457 if (lh
->num_file_names
< file
|| file
== 0)
10458 dwarf2_debug_line_missing_file_complaint ();
10461 lh
->file_names
[file
- 1].included_p
= 1;
10462 if (!decode_for_pst_p
&& is_stmt
)
10464 if (last_subfile
!= current_subfile
)
10466 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10468 record_line (last_subfile
, 0, addr
);
10469 last_subfile
= current_subfile
;
10471 addr
= check_cu_functions (address
, cu
);
10472 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10473 record_line (current_subfile
, line
, addr
);
10478 case DW_LNS_advance_pc
:
10481 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10483 address
+= (((op_index
+ adjust
)
10484 / lh
->maximum_ops_per_instruction
)
10485 * lh
->minimum_instruction_length
);
10486 op_index
= ((op_index
+ adjust
)
10487 % lh
->maximum_ops_per_instruction
);
10488 line_ptr
+= bytes_read
;
10491 case DW_LNS_advance_line
:
10492 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
10493 line_ptr
+= bytes_read
;
10495 case DW_LNS_set_file
:
10497 /* The arrays lh->include_dirs and lh->file_names are
10498 0-based, but the directory and file name numbers in
10499 the statement program are 1-based. */
10500 struct file_entry
*fe
;
10503 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10504 line_ptr
+= bytes_read
;
10505 if (lh
->num_file_names
< file
|| file
== 0)
10506 dwarf2_debug_line_missing_file_complaint ();
10509 fe
= &lh
->file_names
[file
- 1];
10511 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10512 if (!decode_for_pst_p
)
10514 last_subfile
= current_subfile
;
10515 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10520 case DW_LNS_set_column
:
10521 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10522 line_ptr
+= bytes_read
;
10524 case DW_LNS_negate_stmt
:
10525 is_stmt
= (!is_stmt
);
10527 case DW_LNS_set_basic_block
:
10530 /* Add to the address register of the state machine the
10531 address increment value corresponding to special opcode
10532 255. I.e., this value is scaled by the minimum
10533 instruction length since special opcode 255 would have
10534 scaled the the increment. */
10535 case DW_LNS_const_add_pc
:
10537 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
10539 address
+= (((op_index
+ adjust
)
10540 / lh
->maximum_ops_per_instruction
)
10541 * lh
->minimum_instruction_length
);
10542 op_index
= ((op_index
+ adjust
)
10543 % lh
->maximum_ops_per_instruction
);
10546 case DW_LNS_fixed_advance_pc
:
10547 address
+= read_2_bytes (abfd
, line_ptr
);
10553 /* Unknown standard opcode, ignore it. */
10556 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
10558 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10559 line_ptr
+= bytes_read
;
10564 if (lh
->num_file_names
< file
|| file
== 0)
10565 dwarf2_debug_line_missing_file_complaint ();
10568 lh
->file_names
[file
- 1].included_p
= 1;
10569 if (!decode_for_pst_p
)
10571 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10572 record_line (current_subfile
, 0, addr
);
10577 if (decode_for_pst_p
)
10581 /* Now that we're done scanning the Line Header Program, we can
10582 create the psymtab of each included file. */
10583 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
10584 if (lh
->file_names
[file_index
].included_p
== 1)
10586 char *include_name
=
10587 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
10588 if (include_name
!= NULL
)
10589 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
10594 /* Make sure a symtab is created for every file, even files
10595 which contain only variables (i.e. no code with associated
10599 struct file_entry
*fe
;
10601 for (i
= 0; i
< lh
->num_file_names
; i
++)
10605 fe
= &lh
->file_names
[i
];
10607 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10608 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10610 /* Skip the main file; we don't need it, and it must be
10611 allocated last, so that it will show up before the
10612 non-primary symtabs in the objfile's symtab list. */
10613 if (current_subfile
== first_subfile
)
10616 if (current_subfile
->symtab
== NULL
)
10617 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
10619 fe
->symtab
= current_subfile
->symtab
;
10624 /* Start a subfile for DWARF. FILENAME is the name of the file and
10625 DIRNAME the name of the source directory which contains FILENAME
10626 or NULL if not known. COMP_DIR is the compilation directory for the
10627 linetable's compilation unit or NULL if not known.
10628 This routine tries to keep line numbers from identical absolute and
10629 relative file names in a common subfile.
10631 Using the `list' example from the GDB testsuite, which resides in
10632 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
10633 of /srcdir/list0.c yields the following debugging information for list0.c:
10635 DW_AT_name: /srcdir/list0.c
10636 DW_AT_comp_dir: /compdir
10637 files.files[0].name: list0.h
10638 files.files[0].dir: /srcdir
10639 files.files[1].name: list0.c
10640 files.files[1].dir: /srcdir
10642 The line number information for list0.c has to end up in a single
10643 subfile, so that `break /srcdir/list0.c:1' works as expected.
10644 start_subfile will ensure that this happens provided that we pass the
10645 concatenation of files.files[1].dir and files.files[1].name as the
10649 dwarf2_start_subfile (char *filename
, const char *dirname
,
10650 const char *comp_dir
)
10654 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
10655 `start_symtab' will always pass the contents of DW_AT_comp_dir as
10656 second argument to start_subfile. To be consistent, we do the
10657 same here. In order not to lose the line information directory,
10658 we concatenate it to the filename when it makes sense.
10659 Note that the Dwarf3 standard says (speaking of filenames in line
10660 information): ``The directory index is ignored for file names
10661 that represent full path names''. Thus ignoring dirname in the
10662 `else' branch below isn't an issue. */
10664 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
10665 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
10667 fullname
= filename
;
10669 start_subfile (fullname
, comp_dir
);
10671 if (fullname
!= filename
)
10676 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
10677 struct dwarf2_cu
*cu
)
10679 struct objfile
*objfile
= cu
->objfile
;
10680 struct comp_unit_head
*cu_header
= &cu
->header
;
10682 /* NOTE drow/2003-01-30: There used to be a comment and some special
10683 code here to turn a symbol with DW_AT_external and a
10684 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
10685 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
10686 with some versions of binutils) where shared libraries could have
10687 relocations against symbols in their debug information - the
10688 minimal symbol would have the right address, but the debug info
10689 would not. It's no longer necessary, because we will explicitly
10690 apply relocations when we read in the debug information now. */
10692 /* A DW_AT_location attribute with no contents indicates that a
10693 variable has been optimized away. */
10694 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
10696 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10700 /* Handle one degenerate form of location expression specially, to
10701 preserve GDB's previous behavior when section offsets are
10702 specified. If this is just a DW_OP_addr then mark this symbol
10705 if (attr_form_is_block (attr
)
10706 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
10707 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
10709 unsigned int dummy
;
10711 SYMBOL_VALUE_ADDRESS (sym
) =
10712 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
10713 SYMBOL_CLASS (sym
) = LOC_STATIC
;
10714 fixup_symbol_section (sym
, objfile
);
10715 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
10716 SYMBOL_SECTION (sym
));
10720 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
10721 expression evaluator, and use LOC_COMPUTED only when necessary
10722 (i.e. when the value of a register or memory location is
10723 referenced, or a thread-local block, etc.). Then again, it might
10724 not be worthwhile. I'm assuming that it isn't unless performance
10725 or memory numbers show me otherwise. */
10727 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
10728 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
10731 /* Given a pointer to a DWARF information entry, figure out if we need
10732 to make a symbol table entry for it, and if so, create a new entry
10733 and return a pointer to it.
10734 If TYPE is NULL, determine symbol type from the die, otherwise
10735 used the passed type.
10736 If SPACE is not NULL, use it to hold the new symbol. If it is
10737 NULL, allocate a new symbol on the objfile's obstack. */
10739 static struct symbol
*
10740 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
10741 struct symbol
*space
)
10743 struct objfile
*objfile
= cu
->objfile
;
10744 struct symbol
*sym
= NULL
;
10746 struct attribute
*attr
= NULL
;
10747 struct attribute
*attr2
= NULL
;
10748 CORE_ADDR baseaddr
;
10749 struct pending
**list_to_add
= NULL
;
10751 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
10753 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10755 name
= dwarf2_name (die
, cu
);
10758 const char *linkagename
;
10759 int suppress_add
= 0;
10764 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
10765 OBJSTAT (objfile
, n_syms
++);
10767 /* Cache this symbol's name and the name's demangled form (if any). */
10768 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
10769 linkagename
= dwarf2_physname (name
, die
, cu
);
10770 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
10772 /* Fortran does not have mangling standard and the mangling does differ
10773 between gfortran, iFort etc. */
10774 if (cu
->language
== language_fortran
10775 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
10776 symbol_set_demangled_name (&(sym
->ginfo
),
10777 (char *) dwarf2_full_name (name
, die
, cu
),
10780 /* Default assumptions.
10781 Use the passed type or decode it from the die. */
10782 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10783 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10785 SYMBOL_TYPE (sym
) = type
;
10787 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
10788 attr
= dwarf2_attr (die
,
10789 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
10793 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
10796 attr
= dwarf2_attr (die
,
10797 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
10801 int file_index
= DW_UNSND (attr
);
10803 if (cu
->line_header
== NULL
10804 || file_index
> cu
->line_header
->num_file_names
)
10805 complaint (&symfile_complaints
,
10806 _("file index out of range"));
10807 else if (file_index
> 0)
10809 struct file_entry
*fe
;
10811 fe
= &cu
->line_header
->file_names
[file_index
- 1];
10812 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
10819 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10822 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
10824 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
10825 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
10826 SYMBOL_CLASS (sym
) = LOC_LABEL
;
10827 add_symbol_to_list (sym
, cu
->list_in_scope
);
10829 case DW_TAG_subprogram
:
10830 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10832 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10833 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10834 if ((attr2
&& (DW_UNSND (attr2
) != 0))
10835 || cu
->language
== language_ada
)
10837 /* Subprograms marked external are stored as a global symbol.
10838 Ada subprograms, whether marked external or not, are always
10839 stored as a global symbol, because we want to be able to
10840 access them globally. For instance, we want to be able
10841 to break on a nested subprogram without having to
10842 specify the context. */
10843 list_to_add
= &global_symbols
;
10847 list_to_add
= cu
->list_in_scope
;
10850 case DW_TAG_inlined_subroutine
:
10851 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10853 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10854 SYMBOL_INLINED (sym
) = 1;
10855 /* Do not add the symbol to any lists. It will be found via
10856 BLOCK_FUNCTION from the blockvector. */
10858 case DW_TAG_template_value_param
:
10860 /* Fall through. */
10861 case DW_TAG_constant
:
10862 case DW_TAG_variable
:
10863 case DW_TAG_member
:
10864 /* Compilation with minimal debug info may result in
10865 variables with missing type entries. Change the
10866 misleading `void' type to something sensible. */
10867 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
10869 = objfile_type (objfile
)->nodebug_data_symbol
;
10871 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10872 /* In the case of DW_TAG_member, we should only be called for
10873 static const members. */
10874 if (die
->tag
== DW_TAG_member
)
10876 /* dwarf2_add_field uses die_is_declaration,
10877 so we do the same. */
10878 gdb_assert (die_is_declaration (die
, cu
));
10883 dwarf2_const_value (attr
, sym
, cu
);
10884 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10887 if (attr2
&& (DW_UNSND (attr2
) != 0))
10888 list_to_add
= &global_symbols
;
10890 list_to_add
= cu
->list_in_scope
;
10894 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10897 var_decode_location (attr
, sym
, cu
);
10898 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10899 if (SYMBOL_CLASS (sym
) == LOC_STATIC
10900 && SYMBOL_VALUE_ADDRESS (sym
) == 0
10901 && !dwarf2_per_objfile
->has_section_at_zero
)
10903 /* When a static variable is eliminated by the linker,
10904 the corresponding debug information is not stripped
10905 out, but the variable address is set to null;
10906 do not add such variables into symbol table. */
10908 else if (attr2
&& (DW_UNSND (attr2
) != 0))
10910 /* Workaround gfortran PR debug/40040 - it uses
10911 DW_AT_location for variables in -fPIC libraries which may
10912 get overriden by other libraries/executable and get
10913 a different address. Resolve it by the minimal symbol
10914 which may come from inferior's executable using copy
10915 relocation. Make this workaround only for gfortran as for
10916 other compilers GDB cannot guess the minimal symbol
10917 Fortran mangling kind. */
10918 if (cu
->language
== language_fortran
&& die
->parent
10919 && die
->parent
->tag
== DW_TAG_module
10921 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
10922 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10924 /* A variable with DW_AT_external is never static,
10925 but it may be block-scoped. */
10926 list_to_add
= (cu
->list_in_scope
== &file_symbols
10927 ? &global_symbols
: cu
->list_in_scope
);
10930 list_to_add
= cu
->list_in_scope
;
10934 /* We do not know the address of this symbol.
10935 If it is an external symbol and we have type information
10936 for it, enter the symbol as a LOC_UNRESOLVED symbol.
10937 The address of the variable will then be determined from
10938 the minimal symbol table whenever the variable is
10940 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10941 if (attr2
&& (DW_UNSND (attr2
) != 0)
10942 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
10944 /* A variable with DW_AT_external is never static, but it
10945 may be block-scoped. */
10946 list_to_add
= (cu
->list_in_scope
== &file_symbols
10947 ? &global_symbols
: cu
->list_in_scope
);
10949 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10951 else if (!die_is_declaration (die
, cu
))
10953 /* Use the default LOC_OPTIMIZED_OUT class. */
10954 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
10956 list_to_add
= cu
->list_in_scope
;
10960 case DW_TAG_formal_parameter
:
10961 /* If we are inside a function, mark this as an argument. If
10962 not, we might be looking at an argument to an inlined function
10963 when we do not have enough information to show inlined frames;
10964 pretend it's a local variable in that case so that the user can
10966 if (context_stack_depth
> 0
10967 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
10968 SYMBOL_IS_ARGUMENT (sym
) = 1;
10969 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10972 var_decode_location (attr
, sym
, cu
);
10974 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10977 dwarf2_const_value (attr
, sym
, cu
);
10979 attr
= dwarf2_attr (die
, DW_AT_variable_parameter
, cu
);
10980 if (attr
&& DW_UNSND (attr
))
10982 struct type
*ref_type
;
10984 ref_type
= lookup_reference_type (SYMBOL_TYPE (sym
));
10985 SYMBOL_TYPE (sym
) = ref_type
;
10988 list_to_add
= cu
->list_in_scope
;
10990 case DW_TAG_unspecified_parameters
:
10991 /* From varargs functions; gdb doesn't seem to have any
10992 interest in this information, so just ignore it for now.
10995 case DW_TAG_template_type_param
:
10997 /* Fall through. */
10998 case DW_TAG_class_type
:
10999 case DW_TAG_interface_type
:
11000 case DW_TAG_structure_type
:
11001 case DW_TAG_union_type
:
11002 case DW_TAG_set_type
:
11003 case DW_TAG_enumeration_type
:
11004 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11005 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
11008 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
11009 really ever be static objects: otherwise, if you try
11010 to, say, break of a class's method and you're in a file
11011 which doesn't mention that class, it won't work unless
11012 the check for all static symbols in lookup_symbol_aux
11013 saves you. See the OtherFileClass tests in
11014 gdb.c++/namespace.exp. */
11018 list_to_add
= (cu
->list_in_scope
== &file_symbols
11019 && (cu
->language
== language_cplus
11020 || cu
->language
== language_java
)
11021 ? &global_symbols
: cu
->list_in_scope
);
11023 /* The semantics of C++ state that "struct foo {
11024 ... }" also defines a typedef for "foo". A Java
11025 class declaration also defines a typedef for the
11027 if (cu
->language
== language_cplus
11028 || cu
->language
== language_java
11029 || cu
->language
== language_ada
)
11031 /* The symbol's name is already allocated along
11032 with this objfile, so we don't need to
11033 duplicate it for the type. */
11034 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
11035 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
11040 case DW_TAG_typedef
:
11041 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11042 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11043 list_to_add
= cu
->list_in_scope
;
11045 case DW_TAG_base_type
:
11046 case DW_TAG_subrange_type
:
11047 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11048 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11049 list_to_add
= cu
->list_in_scope
;
11051 case DW_TAG_enumerator
:
11052 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11055 dwarf2_const_value (attr
, sym
, cu
);
11058 /* NOTE: carlton/2003-11-10: See comment above in the
11059 DW_TAG_class_type, etc. block. */
11061 list_to_add
= (cu
->list_in_scope
== &file_symbols
11062 && (cu
->language
== language_cplus
11063 || cu
->language
== language_java
)
11064 ? &global_symbols
: cu
->list_in_scope
);
11067 case DW_TAG_namespace
:
11068 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11069 list_to_add
= &global_symbols
;
11072 /* Not a tag we recognize. Hopefully we aren't processing
11073 trash data, but since we must specifically ignore things
11074 we don't recognize, there is nothing else we should do at
11076 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
11077 dwarf_tag_name (die
->tag
));
11083 sym
->hash_next
= objfile
->template_symbols
;
11084 objfile
->template_symbols
= sym
;
11085 list_to_add
= NULL
;
11088 if (list_to_add
!= NULL
)
11089 add_symbol_to_list (sym
, list_to_add
);
11091 /* For the benefit of old versions of GCC, check for anonymous
11092 namespaces based on the demangled name. */
11093 if (!processing_has_namespace_info
11094 && cu
->language
== language_cplus
)
11095 cp_scan_for_anonymous_namespaces (sym
);
11100 /* A wrapper for new_symbol_full that always allocates a new symbol. */
11102 static struct symbol
*
11103 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11105 return new_symbol_full (die
, type
, cu
, NULL
);
11108 /* Given an attr with a DW_FORM_dataN value in host byte order,
11109 zero-extend it as appropriate for the symbol's type. The DWARF
11110 standard (v4) is not entirely clear about the meaning of using
11111 DW_FORM_dataN for a constant with a signed type, where the type is
11112 wider than the data. The conclusion of a discussion on the DWARF
11113 list was that this is unspecified. We choose to always zero-extend
11114 because that is the interpretation long in use by GCC. */
11117 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
11118 const char *name
, struct obstack
*obstack
,
11119 struct dwarf2_cu
*cu
, long *value
, int bits
)
11121 struct objfile
*objfile
= cu
->objfile
;
11122 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
11123 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
11124 LONGEST l
= DW_UNSND (attr
);
11126 if (bits
< sizeof (*value
) * 8)
11128 l
&= ((LONGEST
) 1 << bits
) - 1;
11131 else if (bits
== sizeof (*value
) * 8)
11135 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
11136 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
11143 /* Read a constant value from an attribute. Either set *VALUE, or if
11144 the value does not fit in *VALUE, set *BYTES - either already
11145 allocated on the objfile obstack, or newly allocated on OBSTACK,
11146 or, set *BATON, if we translated the constant to a location
11150 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
11151 const char *name
, struct obstack
*obstack
,
11152 struct dwarf2_cu
*cu
,
11153 long *value
, gdb_byte
**bytes
,
11154 struct dwarf2_locexpr_baton
**baton
)
11156 struct objfile
*objfile
= cu
->objfile
;
11157 struct comp_unit_head
*cu_header
= &cu
->header
;
11158 struct dwarf_block
*blk
;
11159 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
11160 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
11166 switch (attr
->form
)
11172 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
11173 dwarf2_const_value_length_mismatch_complaint (name
,
11174 cu_header
->addr_size
,
11175 TYPE_LENGTH (type
));
11176 /* Symbols of this form are reasonably rare, so we just
11177 piggyback on the existing location code rather than writing
11178 a new implementation of symbol_computed_ops. */
11179 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
11180 sizeof (struct dwarf2_locexpr_baton
));
11181 (*baton
)->per_cu
= cu
->per_cu
;
11182 gdb_assert ((*baton
)->per_cu
);
11184 (*baton
)->size
= 2 + cu_header
->addr_size
;
11185 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
11186 (*baton
)->data
= data
;
11188 data
[0] = DW_OP_addr
;
11189 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
11190 byte_order
, DW_ADDR (attr
));
11191 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
11194 case DW_FORM_string
:
11196 /* DW_STRING is already allocated on the objfile obstack, point
11198 *bytes
= (gdb_byte
*) DW_STRING (attr
);
11200 case DW_FORM_block1
:
11201 case DW_FORM_block2
:
11202 case DW_FORM_block4
:
11203 case DW_FORM_block
:
11204 case DW_FORM_exprloc
:
11205 blk
= DW_BLOCK (attr
);
11206 if (TYPE_LENGTH (type
) != blk
->size
)
11207 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
11208 TYPE_LENGTH (type
));
11209 *bytes
= blk
->data
;
11212 /* The DW_AT_const_value attributes are supposed to carry the
11213 symbol's value "represented as it would be on the target
11214 architecture." By the time we get here, it's already been
11215 converted to host endianness, so we just need to sign- or
11216 zero-extend it as appropriate. */
11217 case DW_FORM_data1
:
11218 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11219 obstack
, cu
, value
, 8);
11221 case DW_FORM_data2
:
11222 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11223 obstack
, cu
, value
, 16);
11225 case DW_FORM_data4
:
11226 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11227 obstack
, cu
, value
, 32);
11229 case DW_FORM_data8
:
11230 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11231 obstack
, cu
, value
, 64);
11234 case DW_FORM_sdata
:
11235 *value
= DW_SND (attr
);
11238 case DW_FORM_udata
:
11239 *value
= DW_UNSND (attr
);
11243 complaint (&symfile_complaints
,
11244 _("unsupported const value attribute form: '%s'"),
11245 dwarf_form_name (attr
->form
));
11252 /* Copy constant value from an attribute to a symbol. */
11255 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
11256 struct dwarf2_cu
*cu
)
11258 struct objfile
*objfile
= cu
->objfile
;
11259 struct comp_unit_head
*cu_header
= &cu
->header
;
11262 struct dwarf2_locexpr_baton
*baton
;
11264 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
11265 SYMBOL_PRINT_NAME (sym
),
11266 &objfile
->objfile_obstack
, cu
,
11267 &value
, &bytes
, &baton
);
11271 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11272 SYMBOL_LOCATION_BATON (sym
) = baton
;
11273 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11275 else if (bytes
!= NULL
)
11277 SYMBOL_VALUE_BYTES (sym
) = bytes
;
11278 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
11282 SYMBOL_VALUE (sym
) = value
;
11283 SYMBOL_CLASS (sym
) = LOC_CONST
;
11287 /* Return the type of the die in question using its DW_AT_type attribute. */
11289 static struct type
*
11290 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11292 struct attribute
*type_attr
;
11294 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
11297 /* A missing DW_AT_type represents a void type. */
11298 return objfile_type (cu
->objfile
)->builtin_void
;
11301 return lookup_die_type (die
, type_attr
, cu
);
11304 /* True iff CU's producer generates GNAT Ada auxiliary information
11305 that allows to find parallel types through that information instead
11306 of having to do expensive parallel lookups by type name. */
11309 need_gnat_info (struct dwarf2_cu
*cu
)
11311 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
11312 of GNAT produces this auxiliary information, without any indication
11313 that it is produced. Part of enhancing the FSF version of GNAT
11314 to produce that information will be to put in place an indicator
11315 that we can use in order to determine whether the descriptive type
11316 info is available or not. One suggestion that has been made is
11317 to use a new attribute, attached to the CU die. For now, assume
11318 that the descriptive type info is not available. */
11322 /* Return the auxiliary type of the die in question using its
11323 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
11324 attribute is not present. */
11326 static struct type
*
11327 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11329 struct attribute
*type_attr
;
11331 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
11335 return lookup_die_type (die
, type_attr
, cu
);
11338 /* If DIE has a descriptive_type attribute, then set the TYPE's
11339 descriptive type accordingly. */
11342 set_descriptive_type (struct type
*type
, struct die_info
*die
,
11343 struct dwarf2_cu
*cu
)
11345 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
11347 if (descriptive_type
)
11349 ALLOCATE_GNAT_AUX_TYPE (type
);
11350 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
11354 /* Return the containing type of the die in question using its
11355 DW_AT_containing_type attribute. */
11357 static struct type
*
11358 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11360 struct attribute
*type_attr
;
11362 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
11364 error (_("Dwarf Error: Problem turning containing type into gdb type "
11365 "[in module %s]"), cu
->objfile
->name
);
11367 return lookup_die_type (die
, type_attr
, cu
);
11370 /* Look up the type of DIE in CU using its type attribute ATTR.
11371 If there is no type substitute an error marker. */
11373 static struct type
*
11374 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
11375 struct dwarf2_cu
*cu
)
11377 struct type
*this_type
;
11379 /* First see if we have it cached. */
11381 if (is_ref_attr (attr
))
11383 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
11385 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
11387 else if (attr
->form
== DW_FORM_sig8
)
11389 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
11390 struct dwarf2_cu
*sig_cu
;
11391 unsigned int offset
;
11393 /* sig_type will be NULL if the signatured type is missing from
11395 if (sig_type
== NULL
)
11396 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11397 "at 0x%x [in module %s]"),
11398 die
->offset
, cu
->objfile
->name
);
11400 gdb_assert (sig_type
->per_cu
.from_debug_types
);
11401 offset
= sig_type
->offset
+ sig_type
->type_offset
;
11402 this_type
= get_die_type_at_offset (offset
, &sig_type
->per_cu
);
11406 dump_die_for_error (die
);
11407 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
11408 dwarf_attr_name (attr
->name
), cu
->objfile
->name
);
11411 /* If not cached we need to read it in. */
11413 if (this_type
== NULL
)
11415 struct die_info
*type_die
;
11416 struct dwarf2_cu
*type_cu
= cu
;
11418 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11419 /* If the type is cached, we should have found it above. */
11420 gdb_assert (get_die_type (type_die
, type_cu
) == NULL
);
11421 this_type
= read_type_die_1 (type_die
, type_cu
);
11424 /* If we still don't have a type use an error marker. */
11426 if (this_type
== NULL
)
11428 char *message
, *saved
;
11430 /* read_type_die already issued a complaint. */
11431 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
11435 saved
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
11436 message
, strlen (message
));
11439 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, cu
->objfile
);
11445 /* Return the type in DIE, CU.
11446 Returns NULL for invalid types.
11448 This first does a lookup in the appropriate type_hash table,
11449 and only reads the die in if necessary.
11451 NOTE: This can be called when reading in partial or full symbols. */
11453 static struct type
*
11454 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
11456 struct type
*this_type
;
11458 this_type
= get_die_type (die
, cu
);
11462 return read_type_die_1 (die
, cu
);
11465 /* Read the type in DIE, CU.
11466 Returns NULL for invalid types. */
11468 static struct type
*
11469 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
11471 struct type
*this_type
= NULL
;
11475 case DW_TAG_class_type
:
11476 case DW_TAG_interface_type
:
11477 case DW_TAG_structure_type
:
11478 case DW_TAG_union_type
:
11479 this_type
= read_structure_type (die
, cu
);
11481 case DW_TAG_enumeration_type
:
11482 this_type
= read_enumeration_type (die
, cu
);
11484 case DW_TAG_subprogram
:
11485 case DW_TAG_subroutine_type
:
11486 case DW_TAG_inlined_subroutine
:
11487 this_type
= read_subroutine_type (die
, cu
);
11489 case DW_TAG_array_type
:
11490 this_type
= read_array_type (die
, cu
);
11492 case DW_TAG_set_type
:
11493 this_type
= read_set_type (die
, cu
);
11495 case DW_TAG_pointer_type
:
11496 this_type
= read_tag_pointer_type (die
, cu
);
11498 case DW_TAG_ptr_to_member_type
:
11499 this_type
= read_tag_ptr_to_member_type (die
, cu
);
11501 case DW_TAG_reference_type
:
11502 this_type
= read_tag_reference_type (die
, cu
);
11504 case DW_TAG_const_type
:
11505 this_type
= read_tag_const_type (die
, cu
);
11507 case DW_TAG_volatile_type
:
11508 this_type
= read_tag_volatile_type (die
, cu
);
11510 case DW_TAG_string_type
:
11511 this_type
= read_tag_string_type (die
, cu
);
11513 case DW_TAG_typedef
:
11514 this_type
= read_typedef (die
, cu
);
11516 case DW_TAG_subrange_type
:
11517 this_type
= read_subrange_type (die
, cu
);
11519 case DW_TAG_base_type
:
11520 this_type
= read_base_type (die
, cu
);
11522 case DW_TAG_unspecified_type
:
11523 this_type
= read_unspecified_type (die
, cu
);
11525 case DW_TAG_namespace
:
11526 this_type
= read_namespace_type (die
, cu
);
11528 case DW_TAG_module
:
11529 this_type
= read_module_type (die
, cu
);
11532 complaint (&symfile_complaints
,
11533 _("unexpected tag in read_type_die: '%s'"),
11534 dwarf_tag_name (die
->tag
));
11541 /* See if we can figure out if the class lives in a namespace. We do
11542 this by looking for a member function; its demangled name will
11543 contain namespace info, if there is any.
11544 Return the computed name or NULL.
11545 Space for the result is allocated on the objfile's obstack.
11546 This is the full-die version of guess_partial_die_structure_name.
11547 In this case we know DIE has no useful parent. */
11550 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11552 struct die_info
*spec_die
;
11553 struct dwarf2_cu
*spec_cu
;
11554 struct die_info
*child
;
11557 spec_die
= die_specification (die
, &spec_cu
);
11558 if (spec_die
!= NULL
)
11564 for (child
= die
->child
;
11566 child
= child
->sibling
)
11568 if (child
->tag
== DW_TAG_subprogram
)
11570 struct attribute
*attr
;
11572 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
11574 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
11578 = language_class_name_from_physname (cu
->language_defn
,
11582 if (actual_name
!= NULL
)
11584 char *die_name
= dwarf2_name (die
, cu
);
11586 if (die_name
!= NULL
11587 && strcmp (die_name
, actual_name
) != 0)
11589 /* Strip off the class name from the full name.
11590 We want the prefix. */
11591 int die_name_len
= strlen (die_name
);
11592 int actual_name_len
= strlen (actual_name
);
11594 /* Test for '::' as a sanity check. */
11595 if (actual_name_len
> die_name_len
+ 2
11596 && actual_name
[actual_name_len
11597 - die_name_len
- 1] == ':')
11599 obsavestring (actual_name
,
11600 actual_name_len
- die_name_len
- 2,
11601 &cu
->objfile
->objfile_obstack
);
11604 xfree (actual_name
);
11613 /* Return the name of the namespace/class that DIE is defined within,
11614 or "" if we can't tell. The caller should not xfree the result.
11616 For example, if we're within the method foo() in the following
11626 then determine_prefix on foo's die will return "N::C". */
11629 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
11631 struct die_info
*parent
, *spec_die
;
11632 struct dwarf2_cu
*spec_cu
;
11633 struct type
*parent_type
;
11635 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
11636 && cu
->language
!= language_fortran
)
11639 /* We have to be careful in the presence of DW_AT_specification.
11640 For example, with GCC 3.4, given the code
11644 // Definition of N::foo.
11648 then we'll have a tree of DIEs like this:
11650 1: DW_TAG_compile_unit
11651 2: DW_TAG_namespace // N
11652 3: DW_TAG_subprogram // declaration of N::foo
11653 4: DW_TAG_subprogram // definition of N::foo
11654 DW_AT_specification // refers to die #3
11656 Thus, when processing die #4, we have to pretend that we're in
11657 the context of its DW_AT_specification, namely the contex of die
11660 spec_die
= die_specification (die
, &spec_cu
);
11661 if (spec_die
== NULL
)
11662 parent
= die
->parent
;
11665 parent
= spec_die
->parent
;
11669 if (parent
== NULL
)
11671 else if (parent
->building_fullname
)
11674 const char *parent_name
;
11676 /* It has been seen on RealView 2.2 built binaries,
11677 DW_TAG_template_type_param types actually _defined_ as
11678 children of the parent class:
11681 template class <class Enum> Class{};
11682 Class<enum E> class_e;
11684 1: DW_TAG_class_type (Class)
11685 2: DW_TAG_enumeration_type (E)
11686 3: DW_TAG_enumerator (enum1:0)
11687 3: DW_TAG_enumerator (enum2:1)
11689 2: DW_TAG_template_type_param
11690 DW_AT_type DW_FORM_ref_udata (E)
11692 Besides being broken debug info, it can put GDB into an
11693 infinite loop. Consider:
11695 When we're building the full name for Class<E>, we'll start
11696 at Class, and go look over its template type parameters,
11697 finding E. We'll then try to build the full name of E, and
11698 reach here. We're now trying to build the full name of E,
11699 and look over the parent DIE for containing scope. In the
11700 broken case, if we followed the parent DIE of E, we'd again
11701 find Class, and once again go look at its template type
11702 arguments, etc., etc. Simply don't consider such parent die
11703 as source-level parent of this die (it can't be, the language
11704 doesn't allow it), and break the loop here. */
11705 name
= dwarf2_name (die
, cu
);
11706 parent_name
= dwarf2_name (parent
, cu
);
11707 complaint (&symfile_complaints
,
11708 _("template param type '%s' defined within parent '%s'"),
11709 name
? name
: "<unknown>",
11710 parent_name
? parent_name
: "<unknown>");
11714 switch (parent
->tag
)
11716 case DW_TAG_namespace
:
11717 parent_type
= read_type_die (parent
, cu
);
11718 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
11719 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
11720 Work around this problem here. */
11721 if (cu
->language
== language_cplus
11722 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
11724 /* We give a name to even anonymous namespaces. */
11725 return TYPE_TAG_NAME (parent_type
);
11726 case DW_TAG_class_type
:
11727 case DW_TAG_interface_type
:
11728 case DW_TAG_structure_type
:
11729 case DW_TAG_union_type
:
11730 case DW_TAG_module
:
11731 parent_type
= read_type_die (parent
, cu
);
11732 if (TYPE_TAG_NAME (parent_type
) != NULL
)
11733 return TYPE_TAG_NAME (parent_type
);
11735 /* An anonymous structure is only allowed non-static data
11736 members; no typedefs, no member functions, et cetera.
11737 So it does not need a prefix. */
11739 case DW_TAG_compile_unit
:
11740 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
11741 if (cu
->language
== language_cplus
11742 && dwarf2_per_objfile
->types
.asection
!= NULL
11743 && die
->child
!= NULL
11744 && (die
->tag
== DW_TAG_class_type
11745 || die
->tag
== DW_TAG_structure_type
11746 || die
->tag
== DW_TAG_union_type
))
11748 char *name
= guess_full_die_structure_name (die
, cu
);
11754 return determine_prefix (parent
, cu
);
11758 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
11759 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
11760 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
11761 an obconcat, otherwise allocate storage for the result. The CU argument is
11762 used to determine the language and hence, the appropriate separator. */
11764 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
11767 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
11768 int physname
, struct dwarf2_cu
*cu
)
11770 const char *lead
= "";
11773 if (suffix
== NULL
|| suffix
[0] == '\0'
11774 || prefix
== NULL
|| prefix
[0] == '\0')
11776 else if (cu
->language
== language_java
)
11778 else if (cu
->language
== language_fortran
&& physname
)
11780 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
11781 DW_AT_MIPS_linkage_name is preferred and used instead. */
11789 if (prefix
== NULL
)
11791 if (suffix
== NULL
)
11797 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
11799 strcpy (retval
, lead
);
11800 strcat (retval
, prefix
);
11801 strcat (retval
, sep
);
11802 strcat (retval
, suffix
);
11807 /* We have an obstack. */
11808 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
11812 /* Return sibling of die, NULL if no sibling. */
11814 static struct die_info
*
11815 sibling_die (struct die_info
*die
)
11817 return die
->sibling
;
11820 /* Get name of a die, return NULL if not found. */
11823 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
11824 struct obstack
*obstack
)
11826 if (name
&& cu
->language
== language_cplus
)
11828 char *canon_name
= cp_canonicalize_string (name
);
11830 if (canon_name
!= NULL
)
11832 if (strcmp (canon_name
, name
) != 0)
11833 name
= obsavestring (canon_name
, strlen (canon_name
),
11835 xfree (canon_name
);
11842 /* Get name of a die, return NULL if not found. */
11845 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11847 struct attribute
*attr
;
11849 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11850 if (!attr
|| !DW_STRING (attr
))
11855 case DW_TAG_compile_unit
:
11856 /* Compilation units have a DW_AT_name that is a filename, not
11857 a source language identifier. */
11858 case DW_TAG_enumeration_type
:
11859 case DW_TAG_enumerator
:
11860 /* These tags always have simple identifiers already; no need
11861 to canonicalize them. */
11862 return DW_STRING (attr
);
11864 case DW_TAG_subprogram
:
11865 /* Java constructors will all be named "<init>", so return
11866 the class name when we see this special case. */
11867 if (cu
->language
== language_java
11868 && DW_STRING (attr
) != NULL
11869 && strcmp (DW_STRING (attr
), "<init>") == 0)
11871 struct dwarf2_cu
*spec_cu
= cu
;
11872 struct die_info
*spec_die
;
11874 /* GCJ will output '<init>' for Java constructor names.
11875 For this special case, return the name of the parent class. */
11877 /* GCJ may output suprogram DIEs with AT_specification set.
11878 If so, use the name of the specified DIE. */
11879 spec_die
= die_specification (die
, &spec_cu
);
11880 if (spec_die
!= NULL
)
11881 return dwarf2_name (spec_die
, spec_cu
);
11886 if (die
->tag
== DW_TAG_class_type
)
11887 return dwarf2_name (die
, cu
);
11889 while (die
->tag
!= DW_TAG_compile_unit
);
11893 case DW_TAG_class_type
:
11894 case DW_TAG_interface_type
:
11895 case DW_TAG_structure_type
:
11896 case DW_TAG_union_type
:
11897 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
11898 structures or unions. These were of the form "._%d" in GCC 4.1,
11899 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
11900 and GCC 4.4. We work around this problem by ignoring these. */
11901 if (strncmp (DW_STRING (attr
), "._", 2) == 0
11902 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
11910 if (!DW_STRING_IS_CANONICAL (attr
))
11913 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
11914 &cu
->objfile
->objfile_obstack
);
11915 DW_STRING_IS_CANONICAL (attr
) = 1;
11917 return DW_STRING (attr
);
11920 /* Return the die that this die in an extension of, or NULL if there
11921 is none. *EXT_CU is the CU containing DIE on input, and the CU
11922 containing the return value on output. */
11924 static struct die_info
*
11925 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
11927 struct attribute
*attr
;
11929 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
11933 return follow_die_ref (die
, attr
, ext_cu
);
11936 /* Convert a DIE tag into its string name. */
11939 dwarf_tag_name (unsigned tag
)
11943 case DW_TAG_padding
:
11944 return "DW_TAG_padding";
11945 case DW_TAG_array_type
:
11946 return "DW_TAG_array_type";
11947 case DW_TAG_class_type
:
11948 return "DW_TAG_class_type";
11949 case DW_TAG_entry_point
:
11950 return "DW_TAG_entry_point";
11951 case DW_TAG_enumeration_type
:
11952 return "DW_TAG_enumeration_type";
11953 case DW_TAG_formal_parameter
:
11954 return "DW_TAG_formal_parameter";
11955 case DW_TAG_imported_declaration
:
11956 return "DW_TAG_imported_declaration";
11958 return "DW_TAG_label";
11959 case DW_TAG_lexical_block
:
11960 return "DW_TAG_lexical_block";
11961 case DW_TAG_member
:
11962 return "DW_TAG_member";
11963 case DW_TAG_pointer_type
:
11964 return "DW_TAG_pointer_type";
11965 case DW_TAG_reference_type
:
11966 return "DW_TAG_reference_type";
11967 case DW_TAG_compile_unit
:
11968 return "DW_TAG_compile_unit";
11969 case DW_TAG_string_type
:
11970 return "DW_TAG_string_type";
11971 case DW_TAG_structure_type
:
11972 return "DW_TAG_structure_type";
11973 case DW_TAG_subroutine_type
:
11974 return "DW_TAG_subroutine_type";
11975 case DW_TAG_typedef
:
11976 return "DW_TAG_typedef";
11977 case DW_TAG_union_type
:
11978 return "DW_TAG_union_type";
11979 case DW_TAG_unspecified_parameters
:
11980 return "DW_TAG_unspecified_parameters";
11981 case DW_TAG_variant
:
11982 return "DW_TAG_variant";
11983 case DW_TAG_common_block
:
11984 return "DW_TAG_common_block";
11985 case DW_TAG_common_inclusion
:
11986 return "DW_TAG_common_inclusion";
11987 case DW_TAG_inheritance
:
11988 return "DW_TAG_inheritance";
11989 case DW_TAG_inlined_subroutine
:
11990 return "DW_TAG_inlined_subroutine";
11991 case DW_TAG_module
:
11992 return "DW_TAG_module";
11993 case DW_TAG_ptr_to_member_type
:
11994 return "DW_TAG_ptr_to_member_type";
11995 case DW_TAG_set_type
:
11996 return "DW_TAG_set_type";
11997 case DW_TAG_subrange_type
:
11998 return "DW_TAG_subrange_type";
11999 case DW_TAG_with_stmt
:
12000 return "DW_TAG_with_stmt";
12001 case DW_TAG_access_declaration
:
12002 return "DW_TAG_access_declaration";
12003 case DW_TAG_base_type
:
12004 return "DW_TAG_base_type";
12005 case DW_TAG_catch_block
:
12006 return "DW_TAG_catch_block";
12007 case DW_TAG_const_type
:
12008 return "DW_TAG_const_type";
12009 case DW_TAG_constant
:
12010 return "DW_TAG_constant";
12011 case DW_TAG_enumerator
:
12012 return "DW_TAG_enumerator";
12013 case DW_TAG_file_type
:
12014 return "DW_TAG_file_type";
12015 case DW_TAG_friend
:
12016 return "DW_TAG_friend";
12017 case DW_TAG_namelist
:
12018 return "DW_TAG_namelist";
12019 case DW_TAG_namelist_item
:
12020 return "DW_TAG_namelist_item";
12021 case DW_TAG_packed_type
:
12022 return "DW_TAG_packed_type";
12023 case DW_TAG_subprogram
:
12024 return "DW_TAG_subprogram";
12025 case DW_TAG_template_type_param
:
12026 return "DW_TAG_template_type_param";
12027 case DW_TAG_template_value_param
:
12028 return "DW_TAG_template_value_param";
12029 case DW_TAG_thrown_type
:
12030 return "DW_TAG_thrown_type";
12031 case DW_TAG_try_block
:
12032 return "DW_TAG_try_block";
12033 case DW_TAG_variant_part
:
12034 return "DW_TAG_variant_part";
12035 case DW_TAG_variable
:
12036 return "DW_TAG_variable";
12037 case DW_TAG_volatile_type
:
12038 return "DW_TAG_volatile_type";
12039 case DW_TAG_dwarf_procedure
:
12040 return "DW_TAG_dwarf_procedure";
12041 case DW_TAG_restrict_type
:
12042 return "DW_TAG_restrict_type";
12043 case DW_TAG_interface_type
:
12044 return "DW_TAG_interface_type";
12045 case DW_TAG_namespace
:
12046 return "DW_TAG_namespace";
12047 case DW_TAG_imported_module
:
12048 return "DW_TAG_imported_module";
12049 case DW_TAG_unspecified_type
:
12050 return "DW_TAG_unspecified_type";
12051 case DW_TAG_partial_unit
:
12052 return "DW_TAG_partial_unit";
12053 case DW_TAG_imported_unit
:
12054 return "DW_TAG_imported_unit";
12055 case DW_TAG_condition
:
12056 return "DW_TAG_condition";
12057 case DW_TAG_shared_type
:
12058 return "DW_TAG_shared_type";
12059 case DW_TAG_type_unit
:
12060 return "DW_TAG_type_unit";
12061 case DW_TAG_MIPS_loop
:
12062 return "DW_TAG_MIPS_loop";
12063 case DW_TAG_HP_array_descriptor
:
12064 return "DW_TAG_HP_array_descriptor";
12065 case DW_TAG_format_label
:
12066 return "DW_TAG_format_label";
12067 case DW_TAG_function_template
:
12068 return "DW_TAG_function_template";
12069 case DW_TAG_class_template
:
12070 return "DW_TAG_class_template";
12071 case DW_TAG_GNU_BINCL
:
12072 return "DW_TAG_GNU_BINCL";
12073 case DW_TAG_GNU_EINCL
:
12074 return "DW_TAG_GNU_EINCL";
12075 case DW_TAG_upc_shared_type
:
12076 return "DW_TAG_upc_shared_type";
12077 case DW_TAG_upc_strict_type
:
12078 return "DW_TAG_upc_strict_type";
12079 case DW_TAG_upc_relaxed_type
:
12080 return "DW_TAG_upc_relaxed_type";
12081 case DW_TAG_PGI_kanji_type
:
12082 return "DW_TAG_PGI_kanji_type";
12083 case DW_TAG_PGI_interface_block
:
12084 return "DW_TAG_PGI_interface_block";
12086 return "DW_TAG_<unknown>";
12090 /* Convert a DWARF attribute code into its string name. */
12093 dwarf_attr_name (unsigned attr
)
12097 case DW_AT_sibling
:
12098 return "DW_AT_sibling";
12099 case DW_AT_location
:
12100 return "DW_AT_location";
12102 return "DW_AT_name";
12103 case DW_AT_ordering
:
12104 return "DW_AT_ordering";
12105 case DW_AT_subscr_data
:
12106 return "DW_AT_subscr_data";
12107 case DW_AT_byte_size
:
12108 return "DW_AT_byte_size";
12109 case DW_AT_bit_offset
:
12110 return "DW_AT_bit_offset";
12111 case DW_AT_bit_size
:
12112 return "DW_AT_bit_size";
12113 case DW_AT_element_list
:
12114 return "DW_AT_element_list";
12115 case DW_AT_stmt_list
:
12116 return "DW_AT_stmt_list";
12118 return "DW_AT_low_pc";
12119 case DW_AT_high_pc
:
12120 return "DW_AT_high_pc";
12121 case DW_AT_language
:
12122 return "DW_AT_language";
12124 return "DW_AT_member";
12126 return "DW_AT_discr";
12127 case DW_AT_discr_value
:
12128 return "DW_AT_discr_value";
12129 case DW_AT_visibility
:
12130 return "DW_AT_visibility";
12132 return "DW_AT_import";
12133 case DW_AT_string_length
:
12134 return "DW_AT_string_length";
12135 case DW_AT_common_reference
:
12136 return "DW_AT_common_reference";
12137 case DW_AT_comp_dir
:
12138 return "DW_AT_comp_dir";
12139 case DW_AT_const_value
:
12140 return "DW_AT_const_value";
12141 case DW_AT_containing_type
:
12142 return "DW_AT_containing_type";
12143 case DW_AT_default_value
:
12144 return "DW_AT_default_value";
12146 return "DW_AT_inline";
12147 case DW_AT_is_optional
:
12148 return "DW_AT_is_optional";
12149 case DW_AT_lower_bound
:
12150 return "DW_AT_lower_bound";
12151 case DW_AT_producer
:
12152 return "DW_AT_producer";
12153 case DW_AT_prototyped
:
12154 return "DW_AT_prototyped";
12155 case DW_AT_return_addr
:
12156 return "DW_AT_return_addr";
12157 case DW_AT_start_scope
:
12158 return "DW_AT_start_scope";
12159 case DW_AT_bit_stride
:
12160 return "DW_AT_bit_stride";
12161 case DW_AT_upper_bound
:
12162 return "DW_AT_upper_bound";
12163 case DW_AT_abstract_origin
:
12164 return "DW_AT_abstract_origin";
12165 case DW_AT_accessibility
:
12166 return "DW_AT_accessibility";
12167 case DW_AT_address_class
:
12168 return "DW_AT_address_class";
12169 case DW_AT_artificial
:
12170 return "DW_AT_artificial";
12171 case DW_AT_base_types
:
12172 return "DW_AT_base_types";
12173 case DW_AT_calling_convention
:
12174 return "DW_AT_calling_convention";
12176 return "DW_AT_count";
12177 case DW_AT_data_member_location
:
12178 return "DW_AT_data_member_location";
12179 case DW_AT_decl_column
:
12180 return "DW_AT_decl_column";
12181 case DW_AT_decl_file
:
12182 return "DW_AT_decl_file";
12183 case DW_AT_decl_line
:
12184 return "DW_AT_decl_line";
12185 case DW_AT_declaration
:
12186 return "DW_AT_declaration";
12187 case DW_AT_discr_list
:
12188 return "DW_AT_discr_list";
12189 case DW_AT_encoding
:
12190 return "DW_AT_encoding";
12191 case DW_AT_external
:
12192 return "DW_AT_external";
12193 case DW_AT_frame_base
:
12194 return "DW_AT_frame_base";
12196 return "DW_AT_friend";
12197 case DW_AT_identifier_case
:
12198 return "DW_AT_identifier_case";
12199 case DW_AT_macro_info
:
12200 return "DW_AT_macro_info";
12201 case DW_AT_namelist_items
:
12202 return "DW_AT_namelist_items";
12203 case DW_AT_priority
:
12204 return "DW_AT_priority";
12205 case DW_AT_segment
:
12206 return "DW_AT_segment";
12207 case DW_AT_specification
:
12208 return "DW_AT_specification";
12209 case DW_AT_static_link
:
12210 return "DW_AT_static_link";
12212 return "DW_AT_type";
12213 case DW_AT_use_location
:
12214 return "DW_AT_use_location";
12215 case DW_AT_variable_parameter
:
12216 return "DW_AT_variable_parameter";
12217 case DW_AT_virtuality
:
12218 return "DW_AT_virtuality";
12219 case DW_AT_vtable_elem_location
:
12220 return "DW_AT_vtable_elem_location";
12221 /* DWARF 3 values. */
12222 case DW_AT_allocated
:
12223 return "DW_AT_allocated";
12224 case DW_AT_associated
:
12225 return "DW_AT_associated";
12226 case DW_AT_data_location
:
12227 return "DW_AT_data_location";
12228 case DW_AT_byte_stride
:
12229 return "DW_AT_byte_stride";
12230 case DW_AT_entry_pc
:
12231 return "DW_AT_entry_pc";
12232 case DW_AT_use_UTF8
:
12233 return "DW_AT_use_UTF8";
12234 case DW_AT_extension
:
12235 return "DW_AT_extension";
12237 return "DW_AT_ranges";
12238 case DW_AT_trampoline
:
12239 return "DW_AT_trampoline";
12240 case DW_AT_call_column
:
12241 return "DW_AT_call_column";
12242 case DW_AT_call_file
:
12243 return "DW_AT_call_file";
12244 case DW_AT_call_line
:
12245 return "DW_AT_call_line";
12246 case DW_AT_description
:
12247 return "DW_AT_description";
12248 case DW_AT_binary_scale
:
12249 return "DW_AT_binary_scale";
12250 case DW_AT_decimal_scale
:
12251 return "DW_AT_decimal_scale";
12253 return "DW_AT_small";
12254 case DW_AT_decimal_sign
:
12255 return "DW_AT_decimal_sign";
12256 case DW_AT_digit_count
:
12257 return "DW_AT_digit_count";
12258 case DW_AT_picture_string
:
12259 return "DW_AT_picture_string";
12260 case DW_AT_mutable
:
12261 return "DW_AT_mutable";
12262 case DW_AT_threads_scaled
:
12263 return "DW_AT_threads_scaled";
12264 case DW_AT_explicit
:
12265 return "DW_AT_explicit";
12266 case DW_AT_object_pointer
:
12267 return "DW_AT_object_pointer";
12268 case DW_AT_endianity
:
12269 return "DW_AT_endianity";
12270 case DW_AT_elemental
:
12271 return "DW_AT_elemental";
12273 return "DW_AT_pure";
12274 case DW_AT_recursive
:
12275 return "DW_AT_recursive";
12276 /* DWARF 4 values. */
12277 case DW_AT_signature
:
12278 return "DW_AT_signature";
12279 case DW_AT_linkage_name
:
12280 return "DW_AT_linkage_name";
12281 /* SGI/MIPS extensions. */
12282 #ifdef MIPS /* collides with DW_AT_HP_block_index */
12283 case DW_AT_MIPS_fde
:
12284 return "DW_AT_MIPS_fde";
12286 case DW_AT_MIPS_loop_begin
:
12287 return "DW_AT_MIPS_loop_begin";
12288 case DW_AT_MIPS_tail_loop_begin
:
12289 return "DW_AT_MIPS_tail_loop_begin";
12290 case DW_AT_MIPS_epilog_begin
:
12291 return "DW_AT_MIPS_epilog_begin";
12292 case DW_AT_MIPS_loop_unroll_factor
:
12293 return "DW_AT_MIPS_loop_unroll_factor";
12294 case DW_AT_MIPS_software_pipeline_depth
:
12295 return "DW_AT_MIPS_software_pipeline_depth";
12296 case DW_AT_MIPS_linkage_name
:
12297 return "DW_AT_MIPS_linkage_name";
12298 case DW_AT_MIPS_stride
:
12299 return "DW_AT_MIPS_stride";
12300 case DW_AT_MIPS_abstract_name
:
12301 return "DW_AT_MIPS_abstract_name";
12302 case DW_AT_MIPS_clone_origin
:
12303 return "DW_AT_MIPS_clone_origin";
12304 case DW_AT_MIPS_has_inlines
:
12305 return "DW_AT_MIPS_has_inlines";
12306 /* HP extensions. */
12307 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
12308 case DW_AT_HP_block_index
:
12309 return "DW_AT_HP_block_index";
12311 case DW_AT_HP_unmodifiable
:
12312 return "DW_AT_HP_unmodifiable";
12313 case DW_AT_HP_actuals_stmt_list
:
12314 return "DW_AT_HP_actuals_stmt_list";
12315 case DW_AT_HP_proc_per_section
:
12316 return "DW_AT_HP_proc_per_section";
12317 case DW_AT_HP_raw_data_ptr
:
12318 return "DW_AT_HP_raw_data_ptr";
12319 case DW_AT_HP_pass_by_reference
:
12320 return "DW_AT_HP_pass_by_reference";
12321 case DW_AT_HP_opt_level
:
12322 return "DW_AT_HP_opt_level";
12323 case DW_AT_HP_prof_version_id
:
12324 return "DW_AT_HP_prof_version_id";
12325 case DW_AT_HP_opt_flags
:
12326 return "DW_AT_HP_opt_flags";
12327 case DW_AT_HP_cold_region_low_pc
:
12328 return "DW_AT_HP_cold_region_low_pc";
12329 case DW_AT_HP_cold_region_high_pc
:
12330 return "DW_AT_HP_cold_region_high_pc";
12331 case DW_AT_HP_all_variables_modifiable
:
12332 return "DW_AT_HP_all_variables_modifiable";
12333 case DW_AT_HP_linkage_name
:
12334 return "DW_AT_HP_linkage_name";
12335 case DW_AT_HP_prof_flags
:
12336 return "DW_AT_HP_prof_flags";
12337 /* GNU extensions. */
12338 case DW_AT_sf_names
:
12339 return "DW_AT_sf_names";
12340 case DW_AT_src_info
:
12341 return "DW_AT_src_info";
12342 case DW_AT_mac_info
:
12343 return "DW_AT_mac_info";
12344 case DW_AT_src_coords
:
12345 return "DW_AT_src_coords";
12346 case DW_AT_body_begin
:
12347 return "DW_AT_body_begin";
12348 case DW_AT_body_end
:
12349 return "DW_AT_body_end";
12350 case DW_AT_GNU_vector
:
12351 return "DW_AT_GNU_vector";
12352 case DW_AT_GNU_odr_signature
:
12353 return "DW_AT_GNU_odr_signature";
12354 /* VMS extensions. */
12355 case DW_AT_VMS_rtnbeg_pd_address
:
12356 return "DW_AT_VMS_rtnbeg_pd_address";
12357 /* UPC extension. */
12358 case DW_AT_upc_threads_scaled
:
12359 return "DW_AT_upc_threads_scaled";
12360 /* PGI (STMicroelectronics) extensions. */
12361 case DW_AT_PGI_lbase
:
12362 return "DW_AT_PGI_lbase";
12363 case DW_AT_PGI_soffset
:
12364 return "DW_AT_PGI_soffset";
12365 case DW_AT_PGI_lstride
:
12366 return "DW_AT_PGI_lstride";
12368 return "DW_AT_<unknown>";
12372 /* Convert a DWARF value form code into its string name. */
12375 dwarf_form_name (unsigned form
)
12380 return "DW_FORM_addr";
12381 case DW_FORM_block2
:
12382 return "DW_FORM_block2";
12383 case DW_FORM_block4
:
12384 return "DW_FORM_block4";
12385 case DW_FORM_data2
:
12386 return "DW_FORM_data2";
12387 case DW_FORM_data4
:
12388 return "DW_FORM_data4";
12389 case DW_FORM_data8
:
12390 return "DW_FORM_data8";
12391 case DW_FORM_string
:
12392 return "DW_FORM_string";
12393 case DW_FORM_block
:
12394 return "DW_FORM_block";
12395 case DW_FORM_block1
:
12396 return "DW_FORM_block1";
12397 case DW_FORM_data1
:
12398 return "DW_FORM_data1";
12400 return "DW_FORM_flag";
12401 case DW_FORM_sdata
:
12402 return "DW_FORM_sdata";
12404 return "DW_FORM_strp";
12405 case DW_FORM_udata
:
12406 return "DW_FORM_udata";
12407 case DW_FORM_ref_addr
:
12408 return "DW_FORM_ref_addr";
12410 return "DW_FORM_ref1";
12412 return "DW_FORM_ref2";
12414 return "DW_FORM_ref4";
12416 return "DW_FORM_ref8";
12417 case DW_FORM_ref_udata
:
12418 return "DW_FORM_ref_udata";
12419 case DW_FORM_indirect
:
12420 return "DW_FORM_indirect";
12421 case DW_FORM_sec_offset
:
12422 return "DW_FORM_sec_offset";
12423 case DW_FORM_exprloc
:
12424 return "DW_FORM_exprloc";
12425 case DW_FORM_flag_present
:
12426 return "DW_FORM_flag_present";
12428 return "DW_FORM_sig8";
12430 return "DW_FORM_<unknown>";
12434 /* Convert a DWARF stack opcode into its string name. */
12437 dwarf_stack_op_name (unsigned op
, int def
)
12442 return "DW_OP_addr";
12444 return "DW_OP_deref";
12445 case DW_OP_const1u
:
12446 return "DW_OP_const1u";
12447 case DW_OP_const1s
:
12448 return "DW_OP_const1s";
12449 case DW_OP_const2u
:
12450 return "DW_OP_const2u";
12451 case DW_OP_const2s
:
12452 return "DW_OP_const2s";
12453 case DW_OP_const4u
:
12454 return "DW_OP_const4u";
12455 case DW_OP_const4s
:
12456 return "DW_OP_const4s";
12457 case DW_OP_const8u
:
12458 return "DW_OP_const8u";
12459 case DW_OP_const8s
:
12460 return "DW_OP_const8s";
12462 return "DW_OP_constu";
12464 return "DW_OP_consts";
12466 return "DW_OP_dup";
12468 return "DW_OP_drop";
12470 return "DW_OP_over";
12472 return "DW_OP_pick";
12474 return "DW_OP_swap";
12476 return "DW_OP_rot";
12478 return "DW_OP_xderef";
12480 return "DW_OP_abs";
12482 return "DW_OP_and";
12484 return "DW_OP_div";
12486 return "DW_OP_minus";
12488 return "DW_OP_mod";
12490 return "DW_OP_mul";
12492 return "DW_OP_neg";
12494 return "DW_OP_not";
12498 return "DW_OP_plus";
12499 case DW_OP_plus_uconst
:
12500 return "DW_OP_plus_uconst";
12502 return "DW_OP_shl";
12504 return "DW_OP_shr";
12506 return "DW_OP_shra";
12508 return "DW_OP_xor";
12510 return "DW_OP_bra";
12524 return "DW_OP_skip";
12526 return "DW_OP_lit0";
12528 return "DW_OP_lit1";
12530 return "DW_OP_lit2";
12532 return "DW_OP_lit3";
12534 return "DW_OP_lit4";
12536 return "DW_OP_lit5";
12538 return "DW_OP_lit6";
12540 return "DW_OP_lit7";
12542 return "DW_OP_lit8";
12544 return "DW_OP_lit9";
12546 return "DW_OP_lit10";
12548 return "DW_OP_lit11";
12550 return "DW_OP_lit12";
12552 return "DW_OP_lit13";
12554 return "DW_OP_lit14";
12556 return "DW_OP_lit15";
12558 return "DW_OP_lit16";
12560 return "DW_OP_lit17";
12562 return "DW_OP_lit18";
12564 return "DW_OP_lit19";
12566 return "DW_OP_lit20";
12568 return "DW_OP_lit21";
12570 return "DW_OP_lit22";
12572 return "DW_OP_lit23";
12574 return "DW_OP_lit24";
12576 return "DW_OP_lit25";
12578 return "DW_OP_lit26";
12580 return "DW_OP_lit27";
12582 return "DW_OP_lit28";
12584 return "DW_OP_lit29";
12586 return "DW_OP_lit30";
12588 return "DW_OP_lit31";
12590 return "DW_OP_reg0";
12592 return "DW_OP_reg1";
12594 return "DW_OP_reg2";
12596 return "DW_OP_reg3";
12598 return "DW_OP_reg4";
12600 return "DW_OP_reg5";
12602 return "DW_OP_reg6";
12604 return "DW_OP_reg7";
12606 return "DW_OP_reg8";
12608 return "DW_OP_reg9";
12610 return "DW_OP_reg10";
12612 return "DW_OP_reg11";
12614 return "DW_OP_reg12";
12616 return "DW_OP_reg13";
12618 return "DW_OP_reg14";
12620 return "DW_OP_reg15";
12622 return "DW_OP_reg16";
12624 return "DW_OP_reg17";
12626 return "DW_OP_reg18";
12628 return "DW_OP_reg19";
12630 return "DW_OP_reg20";
12632 return "DW_OP_reg21";
12634 return "DW_OP_reg22";
12636 return "DW_OP_reg23";
12638 return "DW_OP_reg24";
12640 return "DW_OP_reg25";
12642 return "DW_OP_reg26";
12644 return "DW_OP_reg27";
12646 return "DW_OP_reg28";
12648 return "DW_OP_reg29";
12650 return "DW_OP_reg30";
12652 return "DW_OP_reg31";
12654 return "DW_OP_breg0";
12656 return "DW_OP_breg1";
12658 return "DW_OP_breg2";
12660 return "DW_OP_breg3";
12662 return "DW_OP_breg4";
12664 return "DW_OP_breg5";
12666 return "DW_OP_breg6";
12668 return "DW_OP_breg7";
12670 return "DW_OP_breg8";
12672 return "DW_OP_breg9";
12674 return "DW_OP_breg10";
12676 return "DW_OP_breg11";
12678 return "DW_OP_breg12";
12680 return "DW_OP_breg13";
12682 return "DW_OP_breg14";
12684 return "DW_OP_breg15";
12686 return "DW_OP_breg16";
12688 return "DW_OP_breg17";
12690 return "DW_OP_breg18";
12692 return "DW_OP_breg19";
12694 return "DW_OP_breg20";
12696 return "DW_OP_breg21";
12698 return "DW_OP_breg22";
12700 return "DW_OP_breg23";
12702 return "DW_OP_breg24";
12704 return "DW_OP_breg25";
12706 return "DW_OP_breg26";
12708 return "DW_OP_breg27";
12710 return "DW_OP_breg28";
12712 return "DW_OP_breg29";
12714 return "DW_OP_breg30";
12716 return "DW_OP_breg31";
12718 return "DW_OP_regx";
12720 return "DW_OP_fbreg";
12722 return "DW_OP_bregx";
12724 return "DW_OP_piece";
12725 case DW_OP_deref_size
:
12726 return "DW_OP_deref_size";
12727 case DW_OP_xderef_size
:
12728 return "DW_OP_xderef_size";
12730 return "DW_OP_nop";
12731 /* DWARF 3 extensions. */
12732 case DW_OP_push_object_address
:
12733 return "DW_OP_push_object_address";
12735 return "DW_OP_call2";
12737 return "DW_OP_call4";
12738 case DW_OP_call_ref
:
12739 return "DW_OP_call_ref";
12740 case DW_OP_form_tls_address
:
12741 return "DW_OP_form_tls_address";
12742 case DW_OP_call_frame_cfa
:
12743 return "DW_OP_call_frame_cfa";
12744 case DW_OP_bit_piece
:
12745 return "DW_OP_bit_piece";
12746 /* DWARF 4 extensions. */
12747 case DW_OP_implicit_value
:
12748 return "DW_OP_implicit_value";
12749 case DW_OP_stack_value
:
12750 return "DW_OP_stack_value";
12751 /* GNU extensions. */
12752 case DW_OP_GNU_push_tls_address
:
12753 return "DW_OP_GNU_push_tls_address";
12754 case DW_OP_GNU_uninit
:
12755 return "DW_OP_GNU_uninit";
12756 case DW_OP_GNU_implicit_pointer
:
12757 return "DW_OP_GNU_implicit_pointer";
12759 return def
? "OP_<unknown>" : NULL
;
12764 dwarf_bool_name (unsigned mybool
)
12772 /* Convert a DWARF type code into its string name. */
12775 dwarf_type_encoding_name (unsigned enc
)
12780 return "DW_ATE_void";
12781 case DW_ATE_address
:
12782 return "DW_ATE_address";
12783 case DW_ATE_boolean
:
12784 return "DW_ATE_boolean";
12785 case DW_ATE_complex_float
:
12786 return "DW_ATE_complex_float";
12788 return "DW_ATE_float";
12789 case DW_ATE_signed
:
12790 return "DW_ATE_signed";
12791 case DW_ATE_signed_char
:
12792 return "DW_ATE_signed_char";
12793 case DW_ATE_unsigned
:
12794 return "DW_ATE_unsigned";
12795 case DW_ATE_unsigned_char
:
12796 return "DW_ATE_unsigned_char";
12798 case DW_ATE_imaginary_float
:
12799 return "DW_ATE_imaginary_float";
12800 case DW_ATE_packed_decimal
:
12801 return "DW_ATE_packed_decimal";
12802 case DW_ATE_numeric_string
:
12803 return "DW_ATE_numeric_string";
12804 case DW_ATE_edited
:
12805 return "DW_ATE_edited";
12806 case DW_ATE_signed_fixed
:
12807 return "DW_ATE_signed_fixed";
12808 case DW_ATE_unsigned_fixed
:
12809 return "DW_ATE_unsigned_fixed";
12810 case DW_ATE_decimal_float
:
12811 return "DW_ATE_decimal_float";
12814 return "DW_ATE_UTF";
12815 /* HP extensions. */
12816 case DW_ATE_HP_float80
:
12817 return "DW_ATE_HP_float80";
12818 case DW_ATE_HP_complex_float80
:
12819 return "DW_ATE_HP_complex_float80";
12820 case DW_ATE_HP_float128
:
12821 return "DW_ATE_HP_float128";
12822 case DW_ATE_HP_complex_float128
:
12823 return "DW_ATE_HP_complex_float128";
12824 case DW_ATE_HP_floathpintel
:
12825 return "DW_ATE_HP_floathpintel";
12826 case DW_ATE_HP_imaginary_float80
:
12827 return "DW_ATE_HP_imaginary_float80";
12828 case DW_ATE_HP_imaginary_float128
:
12829 return "DW_ATE_HP_imaginary_float128";
12831 return "DW_ATE_<unknown>";
12835 /* Convert a DWARF call frame info operation to its string name. */
12839 dwarf_cfi_name (unsigned cfi_opc
)
12843 case DW_CFA_advance_loc
:
12844 return "DW_CFA_advance_loc";
12845 case DW_CFA_offset
:
12846 return "DW_CFA_offset";
12847 case DW_CFA_restore
:
12848 return "DW_CFA_restore";
12850 return "DW_CFA_nop";
12851 case DW_CFA_set_loc
:
12852 return "DW_CFA_set_loc";
12853 case DW_CFA_advance_loc1
:
12854 return "DW_CFA_advance_loc1";
12855 case DW_CFA_advance_loc2
:
12856 return "DW_CFA_advance_loc2";
12857 case DW_CFA_advance_loc4
:
12858 return "DW_CFA_advance_loc4";
12859 case DW_CFA_offset_extended
:
12860 return "DW_CFA_offset_extended";
12861 case DW_CFA_restore_extended
:
12862 return "DW_CFA_restore_extended";
12863 case DW_CFA_undefined
:
12864 return "DW_CFA_undefined";
12865 case DW_CFA_same_value
:
12866 return "DW_CFA_same_value";
12867 case DW_CFA_register
:
12868 return "DW_CFA_register";
12869 case DW_CFA_remember_state
:
12870 return "DW_CFA_remember_state";
12871 case DW_CFA_restore_state
:
12872 return "DW_CFA_restore_state";
12873 case DW_CFA_def_cfa
:
12874 return "DW_CFA_def_cfa";
12875 case DW_CFA_def_cfa_register
:
12876 return "DW_CFA_def_cfa_register";
12877 case DW_CFA_def_cfa_offset
:
12878 return "DW_CFA_def_cfa_offset";
12880 case DW_CFA_def_cfa_expression
:
12881 return "DW_CFA_def_cfa_expression";
12882 case DW_CFA_expression
:
12883 return "DW_CFA_expression";
12884 case DW_CFA_offset_extended_sf
:
12885 return "DW_CFA_offset_extended_sf";
12886 case DW_CFA_def_cfa_sf
:
12887 return "DW_CFA_def_cfa_sf";
12888 case DW_CFA_def_cfa_offset_sf
:
12889 return "DW_CFA_def_cfa_offset_sf";
12890 case DW_CFA_val_offset
:
12891 return "DW_CFA_val_offset";
12892 case DW_CFA_val_offset_sf
:
12893 return "DW_CFA_val_offset_sf";
12894 case DW_CFA_val_expression
:
12895 return "DW_CFA_val_expression";
12896 /* SGI/MIPS specific. */
12897 case DW_CFA_MIPS_advance_loc8
:
12898 return "DW_CFA_MIPS_advance_loc8";
12899 /* GNU extensions. */
12900 case DW_CFA_GNU_window_save
:
12901 return "DW_CFA_GNU_window_save";
12902 case DW_CFA_GNU_args_size
:
12903 return "DW_CFA_GNU_args_size";
12904 case DW_CFA_GNU_negative_offset_extended
:
12905 return "DW_CFA_GNU_negative_offset_extended";
12907 return "DW_CFA_<unknown>";
12913 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
12917 print_spaces (indent
, f
);
12918 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
12919 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
12921 if (die
->parent
!= NULL
)
12923 print_spaces (indent
, f
);
12924 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
12925 die
->parent
->offset
);
12928 print_spaces (indent
, f
);
12929 fprintf_unfiltered (f
, " has children: %s\n",
12930 dwarf_bool_name (die
->child
!= NULL
));
12932 print_spaces (indent
, f
);
12933 fprintf_unfiltered (f
, " attributes:\n");
12935 for (i
= 0; i
< die
->num_attrs
; ++i
)
12937 print_spaces (indent
, f
);
12938 fprintf_unfiltered (f
, " %s (%s) ",
12939 dwarf_attr_name (die
->attrs
[i
].name
),
12940 dwarf_form_name (die
->attrs
[i
].form
));
12942 switch (die
->attrs
[i
].form
)
12944 case DW_FORM_ref_addr
:
12946 fprintf_unfiltered (f
, "address: ");
12947 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
12949 case DW_FORM_block2
:
12950 case DW_FORM_block4
:
12951 case DW_FORM_block
:
12952 case DW_FORM_block1
:
12953 fprintf_unfiltered (f
, "block: size %d",
12954 DW_BLOCK (&die
->attrs
[i
])->size
);
12956 case DW_FORM_exprloc
:
12957 fprintf_unfiltered (f
, "expression: size %u",
12958 DW_BLOCK (&die
->attrs
[i
])->size
);
12963 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
12964 (long) (DW_ADDR (&die
->attrs
[i
])));
12966 case DW_FORM_data1
:
12967 case DW_FORM_data2
:
12968 case DW_FORM_data4
:
12969 case DW_FORM_data8
:
12970 case DW_FORM_udata
:
12971 case DW_FORM_sdata
:
12972 fprintf_unfiltered (f
, "constant: %s",
12973 pulongest (DW_UNSND (&die
->attrs
[i
])));
12975 case DW_FORM_sec_offset
:
12976 fprintf_unfiltered (f
, "section offset: %s",
12977 pulongest (DW_UNSND (&die
->attrs
[i
])));
12980 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
12981 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
12982 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
12984 fprintf_unfiltered (f
, "signatured type, offset: unknown");
12986 case DW_FORM_string
:
12988 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
12989 DW_STRING (&die
->attrs
[i
])
12990 ? DW_STRING (&die
->attrs
[i
]) : "",
12991 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
12994 if (DW_UNSND (&die
->attrs
[i
]))
12995 fprintf_unfiltered (f
, "flag: TRUE");
12997 fprintf_unfiltered (f
, "flag: FALSE");
12999 case DW_FORM_flag_present
:
13000 fprintf_unfiltered (f
, "flag: TRUE");
13002 case DW_FORM_indirect
:
13003 /* The reader will have reduced the indirect form to
13004 the "base form" so this form should not occur. */
13005 fprintf_unfiltered (f
,
13006 "unexpected attribute form: DW_FORM_indirect");
13009 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
13010 die
->attrs
[i
].form
);
13013 fprintf_unfiltered (f
, "\n");
13018 dump_die_for_error (struct die_info
*die
)
13020 dump_die_shallow (gdb_stderr
, 0, die
);
13024 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
13026 int indent
= level
* 4;
13028 gdb_assert (die
!= NULL
);
13030 if (level
>= max_level
)
13033 dump_die_shallow (f
, indent
, die
);
13035 if (die
->child
!= NULL
)
13037 print_spaces (indent
, f
);
13038 fprintf_unfiltered (f
, " Children:");
13039 if (level
+ 1 < max_level
)
13041 fprintf_unfiltered (f
, "\n");
13042 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
13046 fprintf_unfiltered (f
,
13047 " [not printed, max nesting level reached]\n");
13051 if (die
->sibling
!= NULL
&& level
> 0)
13053 dump_die_1 (f
, level
, max_level
, die
->sibling
);
13057 /* This is called from the pdie macro in gdbinit.in.
13058 It's not static so gcc will keep a copy callable from gdb. */
13061 dump_die (struct die_info
*die
, int max_level
)
13063 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
13067 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
13071 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
13077 is_ref_attr (struct attribute
*attr
)
13079 switch (attr
->form
)
13081 case DW_FORM_ref_addr
:
13086 case DW_FORM_ref_udata
:
13093 static unsigned int
13094 dwarf2_get_ref_die_offset (struct attribute
*attr
)
13096 if (is_ref_attr (attr
))
13097 return DW_ADDR (attr
);
13099 complaint (&symfile_complaints
,
13100 _("unsupported die ref attribute form: '%s'"),
13101 dwarf_form_name (attr
->form
));
13105 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
13106 * the value held by the attribute is not constant. */
13109 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
13111 if (attr
->form
== DW_FORM_sdata
)
13112 return DW_SND (attr
);
13113 else if (attr
->form
== DW_FORM_udata
13114 || attr
->form
== DW_FORM_data1
13115 || attr
->form
== DW_FORM_data2
13116 || attr
->form
== DW_FORM_data4
13117 || attr
->form
== DW_FORM_data8
)
13118 return DW_UNSND (attr
);
13121 complaint (&symfile_complaints
,
13122 _("Attribute value is not a constant (%s)"),
13123 dwarf_form_name (attr
->form
));
13124 return default_value
;
13128 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
13129 unit and add it to our queue.
13130 The result is non-zero if PER_CU was queued, otherwise the result is zero
13131 meaning either PER_CU is already queued or it is already loaded. */
13134 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
13135 struct dwarf2_per_cu_data
*per_cu
)
13137 /* We may arrive here during partial symbol reading, if we need full
13138 DIEs to process an unusual case (e.g. template arguments). Do
13139 not queue PER_CU, just tell our caller to load its DIEs. */
13140 if (dwarf2_per_objfile
->reading_partial_symbols
)
13142 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
13147 /* Mark the dependence relation so that we don't flush PER_CU
13149 dwarf2_add_dependence (this_cu
, per_cu
);
13151 /* If it's already on the queue, we have nothing to do. */
13152 if (per_cu
->queued
)
13155 /* If the compilation unit is already loaded, just mark it as
13157 if (per_cu
->cu
!= NULL
)
13159 per_cu
->cu
->last_used
= 0;
13163 /* Add it to the queue. */
13164 queue_comp_unit (per_cu
, this_cu
->objfile
);
13169 /* Follow reference or signature attribute ATTR of SRC_DIE.
13170 On entry *REF_CU is the CU of SRC_DIE.
13171 On exit *REF_CU is the CU of the result. */
13173 static struct die_info
*
13174 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
13175 struct dwarf2_cu
**ref_cu
)
13177 struct die_info
*die
;
13179 if (is_ref_attr (attr
))
13180 die
= follow_die_ref (src_die
, attr
, ref_cu
);
13181 else if (attr
->form
== DW_FORM_sig8
)
13182 die
= follow_die_sig (src_die
, attr
, ref_cu
);
13185 dump_die_for_error (src_die
);
13186 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
13187 (*ref_cu
)->objfile
->name
);
13193 /* Follow reference OFFSET.
13194 On entry *REF_CU is the CU of the source die referencing OFFSET.
13195 On exit *REF_CU is the CU of the result.
13196 Returns NULL if OFFSET is invalid. */
13198 static struct die_info
*
13199 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
13201 struct die_info temp_die
;
13202 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
13204 gdb_assert (cu
->per_cu
!= NULL
);
13208 if (cu
->per_cu
->from_debug_types
)
13210 /* .debug_types CUs cannot reference anything outside their CU.
13211 If they need to, they have to reference a signatured type via
13213 if (! offset_in_cu_p (&cu
->header
, offset
))
13216 else if (! offset_in_cu_p (&cu
->header
, offset
))
13218 struct dwarf2_per_cu_data
*per_cu
;
13220 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
13222 /* If necessary, add it to the queue and load its DIEs. */
13223 if (maybe_queue_comp_unit (cu
, per_cu
))
13224 load_full_comp_unit (per_cu
, cu
->objfile
);
13226 target_cu
= per_cu
->cu
;
13228 else if (cu
->dies
== NULL
)
13230 /* We're loading full DIEs during partial symbol reading. */
13231 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
13232 load_full_comp_unit (cu
->per_cu
, cu
->objfile
);
13235 *ref_cu
= target_cu
;
13236 temp_die
.offset
= offset
;
13237 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
13240 /* Follow reference attribute ATTR of SRC_DIE.
13241 On entry *REF_CU is the CU of SRC_DIE.
13242 On exit *REF_CU is the CU of the result. */
13244 static struct die_info
*
13245 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
13246 struct dwarf2_cu
**ref_cu
)
13248 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
13249 struct dwarf2_cu
*cu
= *ref_cu
;
13250 struct die_info
*die
;
13252 die
= follow_die_offset (offset
, ref_cu
);
13254 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
13255 "at 0x%x [in module %s]"),
13256 offset
, src_die
->offset
, cu
->objfile
->name
);
13261 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
13262 value is intended for DW_OP_call*. */
13264 struct dwarf2_locexpr_baton
13265 dwarf2_fetch_die_location_block (unsigned int offset
,
13266 struct dwarf2_per_cu_data
*per_cu
,
13267 CORE_ADDR (*get_frame_pc
) (void *baton
),
13270 struct dwarf2_cu
*cu
= per_cu
->cu
;
13271 struct die_info
*die
;
13272 struct attribute
*attr
;
13273 struct dwarf2_locexpr_baton retval
;
13275 dw2_setup (per_cu
->objfile
);
13277 die
= follow_die_offset (offset
, &cu
);
13279 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
13280 offset
, per_cu
->cu
->objfile
->name
);
13282 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13285 /* DWARF: "If there is no such attribute, then there is no effect.". */
13287 retval
.data
= NULL
;
13290 else if (attr_form_is_section_offset (attr
))
13292 struct dwarf2_loclist_baton loclist_baton
;
13293 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
13296 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
13298 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
13300 retval
.size
= size
;
13304 if (!attr_form_is_block (attr
))
13305 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
13306 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
13307 offset
, per_cu
->cu
->objfile
->name
);
13309 retval
.data
= DW_BLOCK (attr
)->data
;
13310 retval
.size
= DW_BLOCK (attr
)->size
;
13312 retval
.per_cu
= cu
->per_cu
;
13316 /* Follow the signature attribute ATTR in SRC_DIE.
13317 On entry *REF_CU is the CU of SRC_DIE.
13318 On exit *REF_CU is the CU of the result. */
13320 static struct die_info
*
13321 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
13322 struct dwarf2_cu
**ref_cu
)
13324 struct objfile
*objfile
= (*ref_cu
)->objfile
;
13325 struct die_info temp_die
;
13326 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
13327 struct dwarf2_cu
*sig_cu
;
13328 struct die_info
*die
;
13330 /* sig_type will be NULL if the signatured type is missing from
13332 if (sig_type
== NULL
)
13333 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
13334 "at 0x%x [in module %s]"),
13335 src_die
->offset
, objfile
->name
);
13337 /* If necessary, add it to the queue and load its DIEs. */
13339 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
13340 read_signatured_type (objfile
, sig_type
);
13342 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
13344 sig_cu
= sig_type
->per_cu
.cu
;
13345 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
13346 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
13353 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
13354 "from DIE at 0x%x [in module %s]"),
13355 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
13358 /* Given an offset of a signatured type, return its signatured_type. */
13360 static struct signatured_type
*
13361 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
13363 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
13364 unsigned int length
, initial_length_size
;
13365 unsigned int sig_offset
;
13366 struct signatured_type find_entry
, *type_sig
;
13368 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
13369 sig_offset
= (initial_length_size
13371 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
13372 + 1 /*address_size*/);
13373 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
13374 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
13376 /* This is only used to lookup previously recorded types.
13377 If we didn't find it, it's our bug. */
13378 gdb_assert (type_sig
!= NULL
);
13379 gdb_assert (offset
== type_sig
->offset
);
13384 /* Read in signatured type at OFFSET and build its CU and die(s). */
13387 read_signatured_type_at_offset (struct objfile
*objfile
,
13388 unsigned int offset
)
13390 struct signatured_type
*type_sig
;
13392 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13394 /* We have the section offset, but we need the signature to do the
13395 hash table lookup. */
13396 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
13398 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13400 read_signatured_type (objfile
, type_sig
);
13402 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
13405 /* Read in a signatured type and build its CU and DIEs. */
13408 read_signatured_type (struct objfile
*objfile
,
13409 struct signatured_type
*type_sig
)
13411 gdb_byte
*types_ptr
;
13412 struct die_reader_specs reader_specs
;
13413 struct dwarf2_cu
*cu
;
13414 ULONGEST signature
;
13415 struct cleanup
*back_to
, *free_cu_cleanup
;
13417 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13418 types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
13420 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13422 cu
= xmalloc (sizeof (*cu
));
13423 init_one_comp_unit (cu
, objfile
);
13425 type_sig
->per_cu
.cu
= cu
;
13426 cu
->per_cu
= &type_sig
->per_cu
;
13428 /* If an error occurs while loading, release our storage. */
13429 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
13431 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
13432 types_ptr
, objfile
->obfd
);
13433 gdb_assert (signature
== type_sig
->signature
);
13436 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13440 &cu
->comp_unit_obstack
,
13441 hashtab_obstack_allocate
,
13442 dummy_obstack_deallocate
);
13444 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
13445 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
13447 init_cu_die_reader (&reader_specs
, cu
);
13449 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
13452 /* We try not to read any attributes in this function, because not
13453 all objfiles needed for references have been loaded yet, and symbol
13454 table processing isn't initialized. But we have to set the CU language,
13455 or we won't be able to build types correctly. */
13456 prepare_one_comp_unit (cu
, cu
->dies
);
13458 do_cleanups (back_to
);
13460 /* We've successfully allocated this compilation unit. Let our caller
13461 clean it up when finished with it. */
13462 discard_cleanups (free_cu_cleanup
);
13464 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
13465 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
13468 /* Decode simple location descriptions.
13469 Given a pointer to a dwarf block that defines a location, compute
13470 the location and return the value.
13472 NOTE drow/2003-11-18: This function is called in two situations
13473 now: for the address of static or global variables (partial symbols
13474 only) and for offsets into structures which are expected to be
13475 (more or less) constant. The partial symbol case should go away,
13476 and only the constant case should remain. That will let this
13477 function complain more accurately. A few special modes are allowed
13478 without complaint for global variables (for instance, global
13479 register values and thread-local values).
13481 A location description containing no operations indicates that the
13482 object is optimized out. The return value is 0 for that case.
13483 FIXME drow/2003-11-16: No callers check for this case any more; soon all
13484 callers will only want a very basic result and this can become a
13487 Note that stack[0] is unused except as a default error return. */
13490 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
13492 struct objfile
*objfile
= cu
->objfile
;
13494 int size
= blk
->size
;
13495 gdb_byte
*data
= blk
->data
;
13496 CORE_ADDR stack
[64];
13498 unsigned int bytes_read
, unsnd
;
13504 stack
[++stacki
] = 0;
13543 stack
[++stacki
] = op
- DW_OP_lit0
;
13578 stack
[++stacki
] = op
- DW_OP_reg0
;
13580 dwarf2_complex_location_expr_complaint ();
13584 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13586 stack
[++stacki
] = unsnd
;
13588 dwarf2_complex_location_expr_complaint ();
13592 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
13597 case DW_OP_const1u
:
13598 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
13602 case DW_OP_const1s
:
13603 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
13607 case DW_OP_const2u
:
13608 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
13612 case DW_OP_const2s
:
13613 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
13617 case DW_OP_const4u
:
13618 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
13622 case DW_OP_const4s
:
13623 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
13628 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
13634 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
13639 stack
[stacki
+ 1] = stack
[stacki
];
13644 stack
[stacki
- 1] += stack
[stacki
];
13648 case DW_OP_plus_uconst
:
13649 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
13655 stack
[stacki
- 1] -= stack
[stacki
];
13660 /* If we're not the last op, then we definitely can't encode
13661 this using GDB's address_class enum. This is valid for partial
13662 global symbols, although the variable's address will be bogus
13665 dwarf2_complex_location_expr_complaint ();
13668 case DW_OP_GNU_push_tls_address
:
13669 /* The top of the stack has the offset from the beginning
13670 of the thread control block at which the variable is located. */
13671 /* Nothing should follow this operator, so the top of stack would
13673 /* This is valid for partial global symbols, but the variable's
13674 address will be bogus in the psymtab. */
13676 dwarf2_complex_location_expr_complaint ();
13679 case DW_OP_GNU_uninit
:
13683 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
13684 dwarf_stack_op_name (op
, 1));
13685 return (stack
[stacki
]);
13688 /* Enforce maximum stack depth of SIZE-1 to avoid writing
13689 outside of the allocated space. Also enforce minimum>0. */
13690 if (stacki
>= ARRAY_SIZE (stack
) - 1)
13692 complaint (&symfile_complaints
,
13693 _("location description stack overflow"));
13699 complaint (&symfile_complaints
,
13700 _("location description stack underflow"));
13704 return (stack
[stacki
]);
13707 /* memory allocation interface */
13709 static struct dwarf_block
*
13710 dwarf_alloc_block (struct dwarf2_cu
*cu
)
13712 struct dwarf_block
*blk
;
13714 blk
= (struct dwarf_block
*)
13715 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
13719 static struct abbrev_info
*
13720 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
13722 struct abbrev_info
*abbrev
;
13724 abbrev
= (struct abbrev_info
*)
13725 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
13726 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13730 static struct die_info
*
13731 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
13733 struct die_info
*die
;
13734 size_t size
= sizeof (struct die_info
);
13737 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
13739 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
13740 memset (die
, 0, sizeof (struct die_info
));
13745 /* Macro support. */
13747 /* Return the full name of file number I in *LH's file name table.
13748 Use COMP_DIR as the name of the current directory of the
13749 compilation. The result is allocated using xmalloc; the caller is
13750 responsible for freeing it. */
13752 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
13754 /* Is the file number a valid index into the line header's file name
13755 table? Remember that file numbers start with one, not zero. */
13756 if (1 <= file
&& file
<= lh
->num_file_names
)
13758 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
13760 if (IS_ABSOLUTE_PATH (fe
->name
))
13761 return xstrdup (fe
->name
);
13769 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13775 dir_len
= strlen (dir
);
13776 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
13777 strcpy (full_name
, dir
);
13778 full_name
[dir_len
] = '/';
13779 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
13783 return xstrdup (fe
->name
);
13788 /* The compiler produced a bogus file number. We can at least
13789 record the macro definitions made in the file, even if we
13790 won't be able to find the file by name. */
13791 char fake_name
[80];
13793 sprintf (fake_name
, "<bad macro file number %d>", file
);
13795 complaint (&symfile_complaints
,
13796 _("bad file number in macro information (%d)"),
13799 return xstrdup (fake_name
);
13804 static struct macro_source_file
*
13805 macro_start_file (int file
, int line
,
13806 struct macro_source_file
*current_file
,
13807 const char *comp_dir
,
13808 struct line_header
*lh
, struct objfile
*objfile
)
13810 /* The full name of this source file. */
13811 char *full_name
= file_full_name (file
, lh
, comp_dir
);
13813 /* We don't create a macro table for this compilation unit
13814 at all until we actually get a filename. */
13815 if (! pending_macros
)
13816 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
13817 objfile
->macro_cache
);
13819 if (! current_file
)
13820 /* If we have no current file, then this must be the start_file
13821 directive for the compilation unit's main source file. */
13822 current_file
= macro_set_main (pending_macros
, full_name
);
13824 current_file
= macro_include (current_file
, line
, full_name
);
13828 return current_file
;
13832 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
13833 followed by a null byte. */
13835 copy_string (const char *buf
, int len
)
13837 char *s
= xmalloc (len
+ 1);
13839 memcpy (s
, buf
, len
);
13845 static const char *
13846 consume_improper_spaces (const char *p
, const char *body
)
13850 complaint (&symfile_complaints
,
13851 _("macro definition contains spaces "
13852 "in formal argument list:\n`%s'"),
13864 parse_macro_definition (struct macro_source_file
*file
, int line
,
13869 /* The body string takes one of two forms. For object-like macro
13870 definitions, it should be:
13872 <macro name> " " <definition>
13874 For function-like macro definitions, it should be:
13876 <macro name> "() " <definition>
13878 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
13880 Spaces may appear only where explicitly indicated, and in the
13883 The Dwarf 2 spec says that an object-like macro's name is always
13884 followed by a space, but versions of GCC around March 2002 omit
13885 the space when the macro's definition is the empty string.
13887 The Dwarf 2 spec says that there should be no spaces between the
13888 formal arguments in a function-like macro's formal argument list,
13889 but versions of GCC around March 2002 include spaces after the
13893 /* Find the extent of the macro name. The macro name is terminated
13894 by either a space or null character (for an object-like macro) or
13895 an opening paren (for a function-like macro). */
13896 for (p
= body
; *p
; p
++)
13897 if (*p
== ' ' || *p
== '(')
13900 if (*p
== ' ' || *p
== '\0')
13902 /* It's an object-like macro. */
13903 int name_len
= p
- body
;
13904 char *name
= copy_string (body
, name_len
);
13905 const char *replacement
;
13908 replacement
= body
+ name_len
+ 1;
13911 dwarf2_macro_malformed_definition_complaint (body
);
13912 replacement
= body
+ name_len
;
13915 macro_define_object (file
, line
, name
, replacement
);
13919 else if (*p
== '(')
13921 /* It's a function-like macro. */
13922 char *name
= copy_string (body
, p
- body
);
13925 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
13929 p
= consume_improper_spaces (p
, body
);
13931 /* Parse the formal argument list. */
13932 while (*p
&& *p
!= ')')
13934 /* Find the extent of the current argument name. */
13935 const char *arg_start
= p
;
13937 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
13940 if (! *p
|| p
== arg_start
)
13941 dwarf2_macro_malformed_definition_complaint (body
);
13944 /* Make sure argv has room for the new argument. */
13945 if (argc
>= argv_size
)
13948 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
13951 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
13954 p
= consume_improper_spaces (p
, body
);
13956 /* Consume the comma, if present. */
13961 p
= consume_improper_spaces (p
, body
);
13970 /* Perfectly formed definition, no complaints. */
13971 macro_define_function (file
, line
, name
,
13972 argc
, (const char **) argv
,
13974 else if (*p
== '\0')
13976 /* Complain, but do define it. */
13977 dwarf2_macro_malformed_definition_complaint (body
);
13978 macro_define_function (file
, line
, name
,
13979 argc
, (const char **) argv
,
13983 /* Just complain. */
13984 dwarf2_macro_malformed_definition_complaint (body
);
13987 /* Just complain. */
13988 dwarf2_macro_malformed_definition_complaint (body
);
13994 for (i
= 0; i
< argc
; i
++)
14000 dwarf2_macro_malformed_definition_complaint (body
);
14005 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
14006 char *comp_dir
, bfd
*abfd
,
14007 struct dwarf2_cu
*cu
)
14009 gdb_byte
*mac_ptr
, *mac_end
;
14010 struct macro_source_file
*current_file
= 0;
14011 enum dwarf_macinfo_record_type macinfo_type
;
14012 int at_commandline
;
14014 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
14015 &dwarf2_per_objfile
->macinfo
);
14016 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
14018 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
14022 /* First pass: Find the name of the base filename.
14023 This filename is needed in order to process all macros whose definition
14024 (or undefinition) comes from the command line. These macros are defined
14025 before the first DW_MACINFO_start_file entry, and yet still need to be
14026 associated to the base file.
14028 To determine the base file name, we scan the macro definitions until we
14029 reach the first DW_MACINFO_start_file entry. We then initialize
14030 CURRENT_FILE accordingly so that any macro definition found before the
14031 first DW_MACINFO_start_file can still be associated to the base file. */
14033 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
14034 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
14035 + dwarf2_per_objfile
->macinfo
.size
;
14039 /* Do we at least have room for a macinfo type byte? */
14040 if (mac_ptr
>= mac_end
)
14042 /* Complaint is printed during the second pass as GDB will probably
14043 stop the first pass earlier upon finding
14044 DW_MACINFO_start_file. */
14048 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
14051 switch (macinfo_type
)
14053 /* A zero macinfo type indicates the end of the macro
14058 case DW_MACINFO_define
:
14059 case DW_MACINFO_undef
:
14060 /* Only skip the data by MAC_PTR. */
14062 unsigned int bytes_read
;
14064 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14065 mac_ptr
+= bytes_read
;
14066 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14067 mac_ptr
+= bytes_read
;
14071 case DW_MACINFO_start_file
:
14073 unsigned int bytes_read
;
14076 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14077 mac_ptr
+= bytes_read
;
14078 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14079 mac_ptr
+= bytes_read
;
14081 current_file
= macro_start_file (file
, line
, current_file
,
14082 comp_dir
, lh
, cu
->objfile
);
14086 case DW_MACINFO_end_file
:
14087 /* No data to skip by MAC_PTR. */
14090 case DW_MACINFO_vendor_ext
:
14091 /* Only skip the data by MAC_PTR. */
14093 unsigned int bytes_read
;
14095 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14096 mac_ptr
+= bytes_read
;
14097 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14098 mac_ptr
+= bytes_read
;
14105 } while (macinfo_type
!= 0 && current_file
== NULL
);
14107 /* Second pass: Process all entries.
14109 Use the AT_COMMAND_LINE flag to determine whether we are still processing
14110 command-line macro definitions/undefinitions. This flag is unset when we
14111 reach the first DW_MACINFO_start_file entry. */
14113 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
14115 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
14116 GDB is still reading the definitions from command line. First
14117 DW_MACINFO_start_file will need to be ignored as it was already executed
14118 to create CURRENT_FILE for the main source holding also the command line
14119 definitions. On first met DW_MACINFO_start_file this flag is reset to
14120 normally execute all the remaining DW_MACINFO_start_file macinfos. */
14122 at_commandline
= 1;
14126 /* Do we at least have room for a macinfo type byte? */
14127 if (mac_ptr
>= mac_end
)
14129 dwarf2_macros_too_long_complaint ();
14133 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
14136 switch (macinfo_type
)
14138 /* A zero macinfo type indicates the end of the macro
14143 case DW_MACINFO_define
:
14144 case DW_MACINFO_undef
:
14146 unsigned int bytes_read
;
14150 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14151 mac_ptr
+= bytes_read
;
14152 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14153 mac_ptr
+= bytes_read
;
14155 if (! current_file
)
14157 /* DWARF violation as no main source is present. */
14158 complaint (&symfile_complaints
,
14159 _("debug info with no main source gives macro %s "
14161 macinfo_type
== DW_MACINFO_define
?
14163 macinfo_type
== DW_MACINFO_undef
?
14164 _("undefinition") :
14165 _("something-or-other"), line
, body
);
14168 if ((line
== 0 && !at_commandline
)
14169 || (line
!= 0 && at_commandline
))
14170 complaint (&symfile_complaints
,
14171 _("debug info gives %s macro %s with %s line %d: %s"),
14172 at_commandline
? _("command-line") : _("in-file"),
14173 macinfo_type
== DW_MACINFO_define
?
14175 macinfo_type
== DW_MACINFO_undef
?
14176 _("undefinition") :
14177 _("something-or-other"),
14178 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
14180 if (macinfo_type
== DW_MACINFO_define
)
14181 parse_macro_definition (current_file
, line
, body
);
14182 else if (macinfo_type
== DW_MACINFO_undef
)
14183 macro_undef (current_file
, line
, body
);
14187 case DW_MACINFO_start_file
:
14189 unsigned int bytes_read
;
14192 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14193 mac_ptr
+= bytes_read
;
14194 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14195 mac_ptr
+= bytes_read
;
14197 if ((line
== 0 && !at_commandline
)
14198 || (line
!= 0 && at_commandline
))
14199 complaint (&symfile_complaints
,
14200 _("debug info gives source %d included "
14201 "from %s at %s line %d"),
14202 file
, at_commandline
? _("command-line") : _("file"),
14203 line
== 0 ? _("zero") : _("non-zero"), line
);
14205 if (at_commandline
)
14207 /* This DW_MACINFO_start_file was executed in the pass one. */
14208 at_commandline
= 0;
14211 current_file
= macro_start_file (file
, line
,
14212 current_file
, comp_dir
,
14217 case DW_MACINFO_end_file
:
14218 if (! current_file
)
14219 complaint (&symfile_complaints
,
14220 _("macro debug info has an unmatched "
14221 "`close_file' directive"));
14224 current_file
= current_file
->included_by
;
14225 if (! current_file
)
14227 enum dwarf_macinfo_record_type next_type
;
14229 /* GCC circa March 2002 doesn't produce the zero
14230 type byte marking the end of the compilation
14231 unit. Complain if it's not there, but exit no
14234 /* Do we at least have room for a macinfo type byte? */
14235 if (mac_ptr
>= mac_end
)
14237 dwarf2_macros_too_long_complaint ();
14241 /* We don't increment mac_ptr here, so this is just
14243 next_type
= read_1_byte (abfd
, mac_ptr
);
14244 if (next_type
!= 0)
14245 complaint (&symfile_complaints
,
14246 _("no terminating 0-type entry for "
14247 "macros in `.debug_macinfo' section"));
14254 case DW_MACINFO_vendor_ext
:
14256 unsigned int bytes_read
;
14260 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14261 mac_ptr
+= bytes_read
;
14262 string
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14263 mac_ptr
+= bytes_read
;
14265 /* We don't recognize any vendor extensions. */
14269 } while (macinfo_type
!= 0);
14272 /* Check if the attribute's form is a DW_FORM_block*
14273 if so return true else false. */
14275 attr_form_is_block (struct attribute
*attr
)
14277 return (attr
== NULL
? 0 :
14278 attr
->form
== DW_FORM_block1
14279 || attr
->form
== DW_FORM_block2
14280 || attr
->form
== DW_FORM_block4
14281 || attr
->form
== DW_FORM_block
14282 || attr
->form
== DW_FORM_exprloc
);
14285 /* Return non-zero if ATTR's value is a section offset --- classes
14286 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
14287 You may use DW_UNSND (attr) to retrieve such offsets.
14289 Section 7.5.4, "Attribute Encodings", explains that no attribute
14290 may have a value that belongs to more than one of these classes; it
14291 would be ambiguous if we did, because we use the same forms for all
14294 attr_form_is_section_offset (struct attribute
*attr
)
14296 return (attr
->form
== DW_FORM_data4
14297 || attr
->form
== DW_FORM_data8
14298 || attr
->form
== DW_FORM_sec_offset
);
14302 /* Return non-zero if ATTR's value falls in the 'constant' class, or
14303 zero otherwise. When this function returns true, you can apply
14304 dwarf2_get_attr_constant_value to it.
14306 However, note that for some attributes you must check
14307 attr_form_is_section_offset before using this test. DW_FORM_data4
14308 and DW_FORM_data8 are members of both the constant class, and of
14309 the classes that contain offsets into other debug sections
14310 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
14311 that, if an attribute's can be either a constant or one of the
14312 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
14313 taken as section offsets, not constants. */
14315 attr_form_is_constant (struct attribute
*attr
)
14317 switch (attr
->form
)
14319 case DW_FORM_sdata
:
14320 case DW_FORM_udata
:
14321 case DW_FORM_data1
:
14322 case DW_FORM_data2
:
14323 case DW_FORM_data4
:
14324 case DW_FORM_data8
:
14331 /* A helper function that fills in a dwarf2_loclist_baton. */
14334 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
14335 struct dwarf2_loclist_baton
*baton
,
14336 struct attribute
*attr
)
14338 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
14339 &dwarf2_per_objfile
->loc
);
14341 baton
->per_cu
= cu
->per_cu
;
14342 gdb_assert (baton
->per_cu
);
14343 /* We don't know how long the location list is, but make sure we
14344 don't run off the edge of the section. */
14345 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
14346 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
14347 baton
->base_address
= cu
->base_address
;
14351 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
14352 struct dwarf2_cu
*cu
)
14354 if (attr_form_is_section_offset (attr
)
14355 /* ".debug_loc" may not exist at all, or the offset may be outside
14356 the section. If so, fall through to the complaint in the
14358 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
14360 struct dwarf2_loclist_baton
*baton
;
14362 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
14363 sizeof (struct dwarf2_loclist_baton
));
14365 fill_in_loclist_baton (cu
, baton
, attr
);
14367 if (cu
->base_known
== 0)
14368 complaint (&symfile_complaints
,
14369 _("Location list used without "
14370 "specifying the CU base address."));
14372 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
14373 SYMBOL_LOCATION_BATON (sym
) = baton
;
14377 struct dwarf2_locexpr_baton
*baton
;
14379 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
14380 sizeof (struct dwarf2_locexpr_baton
));
14381 baton
->per_cu
= cu
->per_cu
;
14382 gdb_assert (baton
->per_cu
);
14384 if (attr_form_is_block (attr
))
14386 /* Note that we're just copying the block's data pointer
14387 here, not the actual data. We're still pointing into the
14388 info_buffer for SYM's objfile; right now we never release
14389 that buffer, but when we do clean up properly this may
14391 baton
->size
= DW_BLOCK (attr
)->size
;
14392 baton
->data
= DW_BLOCK (attr
)->data
;
14396 dwarf2_invalid_attrib_class_complaint ("location description",
14397 SYMBOL_NATURAL_NAME (sym
));
14399 baton
->data
= NULL
;
14402 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
14403 SYMBOL_LOCATION_BATON (sym
) = baton
;
14407 /* Return the OBJFILE associated with the compilation unit CU. If CU
14408 came from a separate debuginfo file, then the master objfile is
14412 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
14414 struct objfile
*objfile
= per_cu
->objfile
;
14416 /* Return the master objfile, so that we can report and look up the
14417 correct file containing this variable. */
14418 if (objfile
->separate_debug_objfile_backlink
)
14419 objfile
= objfile
->separate_debug_objfile_backlink
;
14424 /* Return the address size given in the compilation unit header for CU. */
14427 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
14430 return per_cu
->cu
->header
.addr_size
;
14433 /* If the CU is not currently read in, we re-read its header. */
14434 struct objfile
*objfile
= per_cu
->objfile
;
14435 struct dwarf2_per_objfile
*per_objfile
14436 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14437 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14438 struct comp_unit_head cu_header
;
14440 memset (&cu_header
, 0, sizeof cu_header
);
14441 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14442 return cu_header
.addr_size
;
14446 /* Return the offset size given in the compilation unit header for CU. */
14449 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
14452 return per_cu
->cu
->header
.offset_size
;
14455 /* If the CU is not currently read in, we re-read its header. */
14456 struct objfile
*objfile
= per_cu
->objfile
;
14457 struct dwarf2_per_objfile
*per_objfile
14458 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14459 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14460 struct comp_unit_head cu_header
;
14462 memset (&cu_header
, 0, sizeof cu_header
);
14463 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14464 return cu_header
.offset_size
;
14468 /* Return the text offset of the CU. The returned offset comes from
14469 this CU's objfile. If this objfile came from a separate debuginfo
14470 file, then the offset may be different from the corresponding
14471 offset in the parent objfile. */
14474 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
14476 struct objfile
*objfile
= per_cu
->objfile
;
14478 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14481 /* Locate the .debug_info compilation unit from CU's objfile which contains
14482 the DIE at OFFSET. Raises an error on failure. */
14484 static struct dwarf2_per_cu_data
*
14485 dwarf2_find_containing_comp_unit (unsigned int offset
,
14486 struct objfile
*objfile
)
14488 struct dwarf2_per_cu_data
*this_cu
;
14492 high
= dwarf2_per_objfile
->n_comp_units
- 1;
14495 int mid
= low
+ (high
- low
) / 2;
14497 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
14502 gdb_assert (low
== high
);
14503 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
14506 error (_("Dwarf Error: could not find partial DIE containing "
14507 "offset 0x%lx [in module %s]"),
14508 (long) offset
, bfd_get_filename (objfile
->obfd
));
14510 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
14511 return dwarf2_per_objfile
->all_comp_units
[low
-1];
14515 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
14516 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
14517 && offset
>= this_cu
->offset
+ this_cu
->length
)
14518 error (_("invalid dwarf2 offset %u"), offset
);
14519 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
14524 /* Locate the compilation unit from OBJFILE which is located at exactly
14525 OFFSET. Raises an error on failure. */
14527 static struct dwarf2_per_cu_data
*
14528 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
14530 struct dwarf2_per_cu_data
*this_cu
;
14532 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
14533 if (this_cu
->offset
!= offset
)
14534 error (_("no compilation unit with offset %u."), offset
);
14538 /* Initialize dwarf2_cu CU for OBJFILE in a pre-allocated space. */
14541 init_one_comp_unit (struct dwarf2_cu
*cu
, struct objfile
*objfile
)
14543 memset (cu
, 0, sizeof (*cu
));
14544 cu
->objfile
= objfile
;
14545 obstack_init (&cu
->comp_unit_obstack
);
14548 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
14551 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
)
14553 struct attribute
*attr
;
14555 /* Set the language we're debugging. */
14556 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
14558 set_cu_language (DW_UNSND (attr
), cu
);
14560 set_cu_language (language_minimal
, cu
);
14563 /* Release one cached compilation unit, CU. We unlink it from the tree
14564 of compilation units, but we don't remove it from the read_in_chain;
14565 the caller is responsible for that.
14566 NOTE: DATA is a void * because this function is also used as a
14567 cleanup routine. */
14570 free_one_comp_unit (void *data
)
14572 struct dwarf2_cu
*cu
= data
;
14574 if (cu
->per_cu
!= NULL
)
14575 cu
->per_cu
->cu
= NULL
;
14578 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14583 /* This cleanup function is passed the address of a dwarf2_cu on the stack
14584 when we're finished with it. We can't free the pointer itself, but be
14585 sure to unlink it from the cache. Also release any associated storage
14586 and perform cache maintenance.
14588 Only used during partial symbol parsing. */
14591 free_stack_comp_unit (void *data
)
14593 struct dwarf2_cu
*cu
= data
;
14595 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14596 cu
->partial_dies
= NULL
;
14598 if (cu
->per_cu
!= NULL
)
14600 /* This compilation unit is on the stack in our caller, so we
14601 should not xfree it. Just unlink it. */
14602 cu
->per_cu
->cu
= NULL
;
14605 /* If we had a per-cu pointer, then we may have other compilation
14606 units loaded, so age them now. */
14607 age_cached_comp_units ();
14611 /* Free all cached compilation units. */
14614 free_cached_comp_units (void *data
)
14616 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14618 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14619 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14620 while (per_cu
!= NULL
)
14622 struct dwarf2_per_cu_data
*next_cu
;
14624 next_cu
= per_cu
->cu
->read_in_chain
;
14626 free_one_comp_unit (per_cu
->cu
);
14627 *last_chain
= next_cu
;
14633 /* Increase the age counter on each cached compilation unit, and free
14634 any that are too old. */
14637 age_cached_comp_units (void)
14639 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14641 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
14642 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14643 while (per_cu
!= NULL
)
14645 per_cu
->cu
->last_used
++;
14646 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
14647 dwarf2_mark (per_cu
->cu
);
14648 per_cu
= per_cu
->cu
->read_in_chain
;
14651 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14652 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14653 while (per_cu
!= NULL
)
14655 struct dwarf2_per_cu_data
*next_cu
;
14657 next_cu
= per_cu
->cu
->read_in_chain
;
14659 if (!per_cu
->cu
->mark
)
14661 free_one_comp_unit (per_cu
->cu
);
14662 *last_chain
= next_cu
;
14665 last_chain
= &per_cu
->cu
->read_in_chain
;
14671 /* Remove a single compilation unit from the cache. */
14674 free_one_cached_comp_unit (void *target_cu
)
14676 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14678 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14679 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14680 while (per_cu
!= NULL
)
14682 struct dwarf2_per_cu_data
*next_cu
;
14684 next_cu
= per_cu
->cu
->read_in_chain
;
14686 if (per_cu
->cu
== target_cu
)
14688 free_one_comp_unit (per_cu
->cu
);
14689 *last_chain
= next_cu
;
14693 last_chain
= &per_cu
->cu
->read_in_chain
;
14699 /* Release all extra memory associated with OBJFILE. */
14702 dwarf2_free_objfile (struct objfile
*objfile
)
14704 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
14706 if (dwarf2_per_objfile
== NULL
)
14709 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
14710 free_cached_comp_units (NULL
);
14712 if (dwarf2_per_objfile
->quick_file_names_table
)
14713 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
14715 /* Everything else should be on the objfile obstack. */
14718 /* A pair of DIE offset and GDB type pointer. We store these
14719 in a hash table separate from the DIEs, and preserve them
14720 when the DIEs are flushed out of cache. */
14722 struct dwarf2_offset_and_type
14724 unsigned int offset
;
14728 /* Hash function for a dwarf2_offset_and_type. */
14731 offset_and_type_hash (const void *item
)
14733 const struct dwarf2_offset_and_type
*ofs
= item
;
14735 return ofs
->offset
;
14738 /* Equality function for a dwarf2_offset_and_type. */
14741 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
14743 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
14744 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
14746 return ofs_lhs
->offset
== ofs_rhs
->offset
;
14749 /* Set the type associated with DIE to TYPE. Save it in CU's hash
14750 table if necessary. For convenience, return TYPE.
14752 The DIEs reading must have careful ordering to:
14753 * Not cause infite loops trying to read in DIEs as a prerequisite for
14754 reading current DIE.
14755 * Not trying to dereference contents of still incompletely read in types
14756 while reading in other DIEs.
14757 * Enable referencing still incompletely read in types just by a pointer to
14758 the type without accessing its fields.
14760 Therefore caller should follow these rules:
14761 * Try to fetch any prerequisite types we may need to build this DIE type
14762 before building the type and calling set_die_type.
14763 * After building type call set_die_type for current DIE as soon as
14764 possible before fetching more types to complete the current type.
14765 * Make the type as complete as possible before fetching more types. */
14767 static struct type
*
14768 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
14770 struct dwarf2_offset_and_type
**slot
, ofs
;
14771 struct objfile
*objfile
= cu
->objfile
;
14772 htab_t
*type_hash_ptr
;
14774 /* For Ada types, make sure that the gnat-specific data is always
14775 initialized (if not already set). There are a few types where
14776 we should not be doing so, because the type-specific area is
14777 already used to hold some other piece of info (eg: TYPE_CODE_FLT
14778 where the type-specific area is used to store the floatformat).
14779 But this is not a problem, because the gnat-specific information
14780 is actually not needed for these types. */
14781 if (need_gnat_info (cu
)
14782 && TYPE_CODE (type
) != TYPE_CODE_FUNC
14783 && TYPE_CODE (type
) != TYPE_CODE_FLT
14784 && !HAVE_GNAT_AUX_INFO (type
))
14785 INIT_GNAT_SPECIFIC (type
);
14787 if (cu
->per_cu
->from_debug_types
)
14788 type_hash_ptr
= &dwarf2_per_objfile
->debug_types_type_hash
;
14790 type_hash_ptr
= &dwarf2_per_objfile
->debug_info_type_hash
;
14792 if (*type_hash_ptr
== NULL
)
14795 = htab_create_alloc_ex (127,
14796 offset_and_type_hash
,
14797 offset_and_type_eq
,
14799 &objfile
->objfile_obstack
,
14800 hashtab_obstack_allocate
,
14801 dummy_obstack_deallocate
);
14804 ofs
.offset
= die
->offset
;
14806 slot
= (struct dwarf2_offset_and_type
**)
14807 htab_find_slot_with_hash (*type_hash_ptr
, &ofs
, ofs
.offset
, INSERT
);
14809 complaint (&symfile_complaints
,
14810 _("A problem internal to GDB: DIE 0x%x has type already set"),
14812 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
14817 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
14818 table, or return NULL if the die does not have a saved type. */
14820 static struct type
*
14821 get_die_type_at_offset (unsigned int offset
,
14822 struct dwarf2_per_cu_data
*per_cu
)
14824 struct dwarf2_offset_and_type
*slot
, ofs
;
14827 if (per_cu
->from_debug_types
)
14828 type_hash
= dwarf2_per_objfile
->debug_types_type_hash
;
14830 type_hash
= dwarf2_per_objfile
->debug_info_type_hash
;
14831 if (type_hash
== NULL
)
14834 ofs
.offset
= offset
;
14835 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
14842 /* Look up the type for DIE in the appropriate type_hash table,
14843 or return NULL if DIE does not have a saved type. */
14845 static struct type
*
14846 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14848 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
14851 /* Add a dependence relationship from CU to REF_PER_CU. */
14854 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
14855 struct dwarf2_per_cu_data
*ref_per_cu
)
14859 if (cu
->dependencies
== NULL
)
14861 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
14862 NULL
, &cu
->comp_unit_obstack
,
14863 hashtab_obstack_allocate
,
14864 dummy_obstack_deallocate
);
14866 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
14868 *slot
= ref_per_cu
;
14871 /* Subroutine of dwarf2_mark to pass to htab_traverse.
14872 Set the mark field in every compilation unit in the
14873 cache that we must keep because we are keeping CU. */
14876 dwarf2_mark_helper (void **slot
, void *data
)
14878 struct dwarf2_per_cu_data
*per_cu
;
14880 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
14881 if (per_cu
->cu
->mark
)
14883 per_cu
->cu
->mark
= 1;
14885 if (per_cu
->cu
->dependencies
!= NULL
)
14886 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14891 /* Set the mark field in CU and in every other compilation unit in the
14892 cache that we must keep because we are keeping CU. */
14895 dwarf2_mark (struct dwarf2_cu
*cu
)
14900 if (cu
->dependencies
!= NULL
)
14901 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14905 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
14909 per_cu
->cu
->mark
= 0;
14910 per_cu
= per_cu
->cu
->read_in_chain
;
14914 /* Trivial hash function for partial_die_info: the hash value of a DIE
14915 is its offset in .debug_info for this objfile. */
14918 partial_die_hash (const void *item
)
14920 const struct partial_die_info
*part_die
= item
;
14922 return part_die
->offset
;
14925 /* Trivial comparison function for partial_die_info structures: two DIEs
14926 are equal if they have the same offset. */
14929 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
14931 const struct partial_die_info
*part_die_lhs
= item_lhs
;
14932 const struct partial_die_info
*part_die_rhs
= item_rhs
;
14934 return part_die_lhs
->offset
== part_die_rhs
->offset
;
14937 static struct cmd_list_element
*set_dwarf2_cmdlist
;
14938 static struct cmd_list_element
*show_dwarf2_cmdlist
;
14941 set_dwarf2_cmd (char *args
, int from_tty
)
14943 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
14947 show_dwarf2_cmd (char *args
, int from_tty
)
14949 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
14952 /* If section described by INFO was mmapped, munmap it now. */
14955 munmap_section_buffer (struct dwarf2_section_info
*info
)
14957 if (info
->was_mmapped
)
14960 intptr_t begin
= (intptr_t) info
->buffer
;
14961 intptr_t map_begin
= begin
& ~(pagesize
- 1);
14962 size_t map_length
= info
->size
+ begin
- map_begin
;
14964 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
14966 /* Without HAVE_MMAP, we should never be here to begin with. */
14967 gdb_assert_not_reached ("no mmap support");
14972 /* munmap debug sections for OBJFILE, if necessary. */
14975 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
14977 struct dwarf2_per_objfile
*data
= d
;
14979 /* This is sorted according to the order they're defined in to make it easier
14980 to keep in sync. */
14981 munmap_section_buffer (&data
->info
);
14982 munmap_section_buffer (&data
->abbrev
);
14983 munmap_section_buffer (&data
->line
);
14984 munmap_section_buffer (&data
->loc
);
14985 munmap_section_buffer (&data
->macinfo
);
14986 munmap_section_buffer (&data
->str
);
14987 munmap_section_buffer (&data
->ranges
);
14988 munmap_section_buffer (&data
->types
);
14989 munmap_section_buffer (&data
->frame
);
14990 munmap_section_buffer (&data
->eh_frame
);
14991 munmap_section_buffer (&data
->gdb_index
);
14995 /* The "save gdb-index" command. */
14997 /* The contents of the hash table we create when building the string
14999 struct strtab_entry
15001 offset_type offset
;
15005 /* Hash function for a strtab_entry. */
15008 hash_strtab_entry (const void *e
)
15010 const struct strtab_entry
*entry
= e
;
15011 return mapped_index_string_hash (entry
->str
);
15014 /* Equality function for a strtab_entry. */
15017 eq_strtab_entry (const void *a
, const void *b
)
15019 const struct strtab_entry
*ea
= a
;
15020 const struct strtab_entry
*eb
= b
;
15021 return !strcmp (ea
->str
, eb
->str
);
15024 /* Create a strtab_entry hash table. */
15027 create_strtab (void)
15029 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
15030 xfree
, xcalloc
, xfree
);
15033 /* Add a string to the constant pool. Return the string's offset in
15037 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
15040 struct strtab_entry entry
;
15041 struct strtab_entry
*result
;
15044 slot
= htab_find_slot (table
, &entry
, INSERT
);
15049 result
= XNEW (struct strtab_entry
);
15050 result
->offset
= obstack_object_size (cpool
);
15052 obstack_grow_str0 (cpool
, str
);
15055 return result
->offset
;
15058 /* An entry in the symbol table. */
15059 struct symtab_index_entry
15061 /* The name of the symbol. */
15063 /* The offset of the name in the constant pool. */
15064 offset_type index_offset
;
15065 /* A sorted vector of the indices of all the CUs that hold an object
15067 VEC (offset_type
) *cu_indices
;
15070 /* The symbol table. This is a power-of-2-sized hash table. */
15071 struct mapped_symtab
15073 offset_type n_elements
;
15075 struct symtab_index_entry
**data
;
15078 /* Hash function for a symtab_index_entry. */
15081 hash_symtab_entry (const void *e
)
15083 const struct symtab_index_entry
*entry
= e
;
15084 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
15085 sizeof (offset_type
) * VEC_length (offset_type
,
15086 entry
->cu_indices
),
15090 /* Equality function for a symtab_index_entry. */
15093 eq_symtab_entry (const void *a
, const void *b
)
15095 const struct symtab_index_entry
*ea
= a
;
15096 const struct symtab_index_entry
*eb
= b
;
15097 int len
= VEC_length (offset_type
, ea
->cu_indices
);
15098 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
15100 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
15101 VEC_address (offset_type
, eb
->cu_indices
),
15102 sizeof (offset_type
) * len
);
15105 /* Destroy a symtab_index_entry. */
15108 delete_symtab_entry (void *p
)
15110 struct symtab_index_entry
*entry
= p
;
15111 VEC_free (offset_type
, entry
->cu_indices
);
15115 /* Create a hash table holding symtab_index_entry objects. */
15118 create_symbol_hash_table (void)
15120 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
15121 delete_symtab_entry
, xcalloc
, xfree
);
15124 /* Create a new mapped symtab object. */
15126 static struct mapped_symtab
*
15127 create_mapped_symtab (void)
15129 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
15130 symtab
->n_elements
= 0;
15131 symtab
->size
= 1024;
15132 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
15136 /* Destroy a mapped_symtab. */
15139 cleanup_mapped_symtab (void *p
)
15141 struct mapped_symtab
*symtab
= p
;
15142 /* The contents of the array are freed when the other hash table is
15144 xfree (symtab
->data
);
15148 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
15151 static struct symtab_index_entry
**
15152 find_slot (struct mapped_symtab
*symtab
, const char *name
)
15154 offset_type index
, step
, hash
= mapped_index_string_hash (name
);
15156 index
= hash
& (symtab
->size
- 1);
15157 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
15161 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
15162 return &symtab
->data
[index
];
15163 index
= (index
+ step
) & (symtab
->size
- 1);
15167 /* Expand SYMTAB's hash table. */
15170 hash_expand (struct mapped_symtab
*symtab
)
15172 offset_type old_size
= symtab
->size
;
15174 struct symtab_index_entry
**old_entries
= symtab
->data
;
15177 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
15179 for (i
= 0; i
< old_size
; ++i
)
15181 if (old_entries
[i
])
15183 struct symtab_index_entry
**slot
= find_slot (symtab
,
15184 old_entries
[i
]->name
);
15185 *slot
= old_entries
[i
];
15189 xfree (old_entries
);
15192 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
15193 is the index of the CU in which the symbol appears. */
15196 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
15197 offset_type cu_index
)
15199 struct symtab_index_entry
**slot
;
15201 ++symtab
->n_elements
;
15202 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
15203 hash_expand (symtab
);
15205 slot
= find_slot (symtab
, name
);
15208 *slot
= XNEW (struct symtab_index_entry
);
15209 (*slot
)->name
= name
;
15210 (*slot
)->cu_indices
= NULL
;
15212 /* Don't push an index twice. Due to how we add entries we only
15213 have to check the last one. */
15214 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
15215 || VEC_length (offset_type
, (*slot
)->cu_indices
) != cu_index
)
15216 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
15219 /* Add a vector of indices to the constant pool. */
15222 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
15223 struct symtab_index_entry
*entry
)
15227 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
15230 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
15231 offset_type val
= MAYBE_SWAP (len
);
15236 entry
->index_offset
= obstack_object_size (cpool
);
15238 obstack_grow (cpool
, &val
, sizeof (val
));
15240 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
15243 val
= MAYBE_SWAP (iter
);
15244 obstack_grow (cpool
, &val
, sizeof (val
));
15249 struct symtab_index_entry
*old_entry
= *slot
;
15250 entry
->index_offset
= old_entry
->index_offset
;
15253 return entry
->index_offset
;
15256 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
15257 constant pool entries going into the obstack CPOOL. */
15260 write_hash_table (struct mapped_symtab
*symtab
,
15261 struct obstack
*output
, struct obstack
*cpool
)
15264 htab_t symbol_hash_table
;
15267 symbol_hash_table
= create_symbol_hash_table ();
15268 str_table
= create_strtab ();
15270 /* We add all the index vectors to the constant pool first, to
15271 ensure alignment is ok. */
15272 for (i
= 0; i
< symtab
->size
; ++i
)
15274 if (symtab
->data
[i
])
15275 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
15278 /* Now write out the hash table. */
15279 for (i
= 0; i
< symtab
->size
; ++i
)
15281 offset_type str_off
, vec_off
;
15283 if (symtab
->data
[i
])
15285 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
15286 vec_off
= symtab
->data
[i
]->index_offset
;
15290 /* While 0 is a valid constant pool index, it is not valid
15291 to have 0 for both offsets. */
15296 str_off
= MAYBE_SWAP (str_off
);
15297 vec_off
= MAYBE_SWAP (vec_off
);
15299 obstack_grow (output
, &str_off
, sizeof (str_off
));
15300 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
15303 htab_delete (str_table
);
15304 htab_delete (symbol_hash_table
);
15307 /* Struct to map psymtab to CU index in the index file. */
15308 struct psymtab_cu_index_map
15310 struct partial_symtab
*psymtab
;
15311 unsigned int cu_index
;
15315 hash_psymtab_cu_index (const void *item
)
15317 const struct psymtab_cu_index_map
*map
= item
;
15319 return htab_hash_pointer (map
->psymtab
);
15323 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
15325 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
15326 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
15328 return lhs
->psymtab
== rhs
->psymtab
;
15331 /* Helper struct for building the address table. */
15332 struct addrmap_index_data
15334 struct objfile
*objfile
;
15335 struct obstack
*addr_obstack
;
15336 htab_t cu_index_htab
;
15338 /* Non-zero if the previous_* fields are valid.
15339 We can't write an entry until we see the next entry (since it is only then
15340 that we know the end of the entry). */
15341 int previous_valid
;
15342 /* Index of the CU in the table of all CUs in the index file. */
15343 unsigned int previous_cu_index
;
15344 /* Start address of the CU. */
15345 CORE_ADDR previous_cu_start
;
15348 /* Write an address entry to OBSTACK. */
15351 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
15352 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
15354 offset_type cu_index_to_write
;
15356 CORE_ADDR baseaddr
;
15358 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15360 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
15361 obstack_grow (obstack
, addr
, 8);
15362 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
15363 obstack_grow (obstack
, addr
, 8);
15364 cu_index_to_write
= MAYBE_SWAP (cu_index
);
15365 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
15368 /* Worker function for traversing an addrmap to build the address table. */
15371 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
15373 struct addrmap_index_data
*data
= datap
;
15374 struct partial_symtab
*pst
= obj
;
15375 offset_type cu_index
;
15378 if (data
->previous_valid
)
15379 add_address_entry (data
->objfile
, data
->addr_obstack
,
15380 data
->previous_cu_start
, start_addr
,
15381 data
->previous_cu_index
);
15383 data
->previous_cu_start
= start_addr
;
15386 struct psymtab_cu_index_map find_map
, *map
;
15387 find_map
.psymtab
= pst
;
15388 map
= htab_find (data
->cu_index_htab
, &find_map
);
15389 gdb_assert (map
!= NULL
);
15390 data
->previous_cu_index
= map
->cu_index
;
15391 data
->previous_valid
= 1;
15394 data
->previous_valid
= 0;
15399 /* Write OBJFILE's address map to OBSTACK.
15400 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
15401 in the index file. */
15404 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
15405 htab_t cu_index_htab
)
15407 struct addrmap_index_data addrmap_index_data
;
15409 /* When writing the address table, we have to cope with the fact that
15410 the addrmap iterator only provides the start of a region; we have to
15411 wait until the next invocation to get the start of the next region. */
15413 addrmap_index_data
.objfile
= objfile
;
15414 addrmap_index_data
.addr_obstack
= obstack
;
15415 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
15416 addrmap_index_data
.previous_valid
= 0;
15418 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
15419 &addrmap_index_data
);
15421 /* It's highly unlikely the last entry (end address = 0xff...ff)
15422 is valid, but we should still handle it.
15423 The end address is recorded as the start of the next region, but that
15424 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
15426 if (addrmap_index_data
.previous_valid
)
15427 add_address_entry (objfile
, obstack
,
15428 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
15429 addrmap_index_data
.previous_cu_index
);
15432 /* Add a list of partial symbols to SYMTAB. */
15435 write_psymbols (struct mapped_symtab
*symtab
,
15437 struct partial_symbol
**psymp
,
15439 offset_type cu_index
,
15442 for (; count
-- > 0; ++psymp
)
15444 void **slot
, *lookup
;
15446 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
15447 error (_("Ada is not currently supported by the index"));
15449 /* We only want to add a given psymbol once. However, we also
15450 want to account for whether it is global or static. So, we
15451 may add it twice, using slightly different values. */
15454 uintptr_t val
= 1 | (uintptr_t) *psymp
;
15456 lookup
= (void *) val
;
15461 /* Only add a given psymbol once. */
15462 slot
= htab_find_slot (psyms_seen
, lookup
, INSERT
);
15466 add_index_entry (symtab
, SYMBOL_NATURAL_NAME (*psymp
), cu_index
);
15471 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
15472 exception if there is an error. */
15475 write_obstack (FILE *file
, struct obstack
*obstack
)
15477 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
15479 != obstack_object_size (obstack
))
15480 error (_("couldn't data write to file"));
15483 /* Unlink a file if the argument is not NULL. */
15486 unlink_if_set (void *p
)
15488 char **filename
= p
;
15490 unlink (*filename
);
15493 /* A helper struct used when iterating over debug_types. */
15494 struct signatured_type_index_data
15496 struct objfile
*objfile
;
15497 struct mapped_symtab
*symtab
;
15498 struct obstack
*types_list
;
15503 /* A helper function that writes a single signatured_type to an
15507 write_one_signatured_type (void **slot
, void *d
)
15509 struct signatured_type_index_data
*info
= d
;
15510 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
15511 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
15512 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15515 write_psymbols (info
->symtab
,
15517 info
->objfile
->global_psymbols
.list
15518 + psymtab
->globals_offset
,
15519 psymtab
->n_global_syms
, info
->cu_index
,
15521 write_psymbols (info
->symtab
,
15523 info
->objfile
->static_psymbols
.list
15524 + psymtab
->statics_offset
,
15525 psymtab
->n_static_syms
, info
->cu_index
,
15528 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->offset
);
15529 obstack_grow (info
->types_list
, val
, 8);
15530 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->type_offset
);
15531 obstack_grow (info
->types_list
, val
, 8);
15532 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
15533 obstack_grow (info
->types_list
, val
, 8);
15540 /* A cleanup function for an htab_t. */
15543 cleanup_htab (void *arg
)
15548 /* Create an index file for OBJFILE in the directory DIR. */
15551 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
15553 struct cleanup
*cleanup
;
15554 char *filename
, *cleanup_filename
;
15555 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
15556 struct obstack cu_list
, types_cu_list
;
15559 struct mapped_symtab
*symtab
;
15560 offset_type val
, size_of_contents
, total_len
;
15564 htab_t cu_index_htab
;
15565 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
15567 if (!objfile
->psymtabs
)
15569 if (dwarf2_per_objfile
->using_index
)
15570 error (_("Cannot use an index to create the index"));
15572 if (stat (objfile
->name
, &st
) < 0)
15573 perror_with_name (objfile
->name
);
15575 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
15576 INDEX_SUFFIX
, (char *) NULL
);
15577 cleanup
= make_cleanup (xfree
, filename
);
15579 out_file
= fopen (filename
, "wb");
15581 error (_("Can't open `%s' for writing"), filename
);
15583 cleanup_filename
= filename
;
15584 make_cleanup (unlink_if_set
, &cleanup_filename
);
15586 symtab
= create_mapped_symtab ();
15587 make_cleanup (cleanup_mapped_symtab
, symtab
);
15589 obstack_init (&addr_obstack
);
15590 make_cleanup_obstack_free (&addr_obstack
);
15592 obstack_init (&cu_list
);
15593 make_cleanup_obstack_free (&cu_list
);
15595 obstack_init (&types_cu_list
);
15596 make_cleanup_obstack_free (&types_cu_list
);
15598 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
15599 NULL
, xcalloc
, xfree
);
15600 make_cleanup (cleanup_htab
, psyms_seen
);
15602 /* While we're scanning CU's create a table that maps a psymtab pointer
15603 (which is what addrmap records) to its index (which is what is recorded
15604 in the index file). This will later be needed to write the address
15606 cu_index_htab
= htab_create_alloc (100,
15607 hash_psymtab_cu_index
,
15608 eq_psymtab_cu_index
,
15609 NULL
, xcalloc
, xfree
);
15610 make_cleanup (cleanup_htab
, cu_index_htab
);
15611 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
15612 xmalloc (sizeof (struct psymtab_cu_index_map
)
15613 * dwarf2_per_objfile
->n_comp_units
);
15614 make_cleanup (xfree
, psymtab_cu_index_map
);
15616 /* The CU list is already sorted, so we don't need to do additional
15617 work here. Also, the debug_types entries do not appear in
15618 all_comp_units, but only in their own hash table. */
15619 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
15621 struct dwarf2_per_cu_data
*per_cu
15622 = dwarf2_per_objfile
->all_comp_units
[i
];
15623 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15625 struct psymtab_cu_index_map
*map
;
15628 write_psymbols (symtab
,
15630 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
15631 psymtab
->n_global_syms
, i
,
15633 write_psymbols (symtab
,
15635 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
15636 psymtab
->n_static_syms
, i
,
15639 map
= &psymtab_cu_index_map
[i
];
15640 map
->psymtab
= psymtab
;
15642 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
15643 gdb_assert (slot
!= NULL
);
15644 gdb_assert (*slot
== NULL
);
15647 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->offset
);
15648 obstack_grow (&cu_list
, val
, 8);
15649 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
15650 obstack_grow (&cu_list
, val
, 8);
15653 /* Dump the address map. */
15654 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
15656 /* Write out the .debug_type entries, if any. */
15657 if (dwarf2_per_objfile
->signatured_types
)
15659 struct signatured_type_index_data sig_data
;
15661 sig_data
.objfile
= objfile
;
15662 sig_data
.symtab
= symtab
;
15663 sig_data
.types_list
= &types_cu_list
;
15664 sig_data
.psyms_seen
= psyms_seen
;
15665 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
15666 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
15667 write_one_signatured_type
, &sig_data
);
15670 obstack_init (&constant_pool
);
15671 make_cleanup_obstack_free (&constant_pool
);
15672 obstack_init (&symtab_obstack
);
15673 make_cleanup_obstack_free (&symtab_obstack
);
15674 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
15676 obstack_init (&contents
);
15677 make_cleanup_obstack_free (&contents
);
15678 size_of_contents
= 6 * sizeof (offset_type
);
15679 total_len
= size_of_contents
;
15681 /* The version number. */
15682 val
= MAYBE_SWAP (3);
15683 obstack_grow (&contents
, &val
, sizeof (val
));
15685 /* The offset of the CU list from the start of the file. */
15686 val
= MAYBE_SWAP (total_len
);
15687 obstack_grow (&contents
, &val
, sizeof (val
));
15688 total_len
+= obstack_object_size (&cu_list
);
15690 /* The offset of the types CU list from the start of the file. */
15691 val
= MAYBE_SWAP (total_len
);
15692 obstack_grow (&contents
, &val
, sizeof (val
));
15693 total_len
+= obstack_object_size (&types_cu_list
);
15695 /* The offset of the address table from the start of the file. */
15696 val
= MAYBE_SWAP (total_len
);
15697 obstack_grow (&contents
, &val
, sizeof (val
));
15698 total_len
+= obstack_object_size (&addr_obstack
);
15700 /* The offset of the symbol table from the start of the file. */
15701 val
= MAYBE_SWAP (total_len
);
15702 obstack_grow (&contents
, &val
, sizeof (val
));
15703 total_len
+= obstack_object_size (&symtab_obstack
);
15705 /* The offset of the constant pool from the start of the file. */
15706 val
= MAYBE_SWAP (total_len
);
15707 obstack_grow (&contents
, &val
, sizeof (val
));
15708 total_len
+= obstack_object_size (&constant_pool
);
15710 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
15712 write_obstack (out_file
, &contents
);
15713 write_obstack (out_file
, &cu_list
);
15714 write_obstack (out_file
, &types_cu_list
);
15715 write_obstack (out_file
, &addr_obstack
);
15716 write_obstack (out_file
, &symtab_obstack
);
15717 write_obstack (out_file
, &constant_pool
);
15721 /* We want to keep the file, so we set cleanup_filename to NULL
15722 here. See unlink_if_set. */
15723 cleanup_filename
= NULL
;
15725 do_cleanups (cleanup
);
15728 /* The mapped index file format is designed to be directly mmap()able
15729 on any architecture. In most cases, a datum is represented using a
15730 little-endian 32-bit integer value, called an offset_type. Big
15731 endian machines must byte-swap the values before using them.
15732 Exceptions to this rule are noted. The data is laid out such that
15733 alignment is always respected.
15735 A mapped index consists of several sections.
15737 1. The file header. This is a sequence of values, of offset_type
15738 unless otherwise noted:
15740 [0] The version number, currently 3. Versions 1 and 2 are
15742 [1] The offset, from the start of the file, of the CU list.
15743 [2] The offset, from the start of the file, of the types CU list.
15744 Note that this section can be empty, in which case this offset will
15745 be equal to the next offset.
15746 [3] The offset, from the start of the file, of the address section.
15747 [4] The offset, from the start of the file, of the symbol table.
15748 [5] The offset, from the start of the file, of the constant pool.
15750 2. The CU list. This is a sequence of pairs of 64-bit
15751 little-endian values, sorted by the CU offset. The first element
15752 in each pair is the offset of a CU in the .debug_info section. The
15753 second element in each pair is the length of that CU. References
15754 to a CU elsewhere in the map are done using a CU index, which is
15755 just the 0-based index into this table. Note that if there are
15756 type CUs, then conceptually CUs and type CUs form a single list for
15757 the purposes of CU indices.
15759 3. The types CU list. This is a sequence of triplets of 64-bit
15760 little-endian values. In a triplet, the first value is the CU
15761 offset, the second value is the type offset in the CU, and the
15762 third value is the type signature. The types CU list is not
15765 4. The address section. The address section consists of a sequence
15766 of address entries. Each address entry has three elements.
15767 [0] The low address. This is a 64-bit little-endian value.
15768 [1] The high address. This is a 64-bit little-endian value.
15769 Like DW_AT_high_pc, the value is one byte beyond the end.
15770 [2] The CU index. This is an offset_type value.
15772 5. The symbol table. This is a hash table. The size of the hash
15773 table is always a power of 2. The initial hash and the step are
15774 currently defined by the `find_slot' function.
15776 Each slot in the hash table consists of a pair of offset_type
15777 values. The first value is the offset of the symbol's name in the
15778 constant pool. The second value is the offset of the CU vector in
15781 If both values are 0, then this slot in the hash table is empty.
15782 This is ok because while 0 is a valid constant pool index, it
15783 cannot be a valid index for both a string and a CU vector.
15785 A string in the constant pool is stored as a \0-terminated string,
15788 A CU vector in the constant pool is a sequence of offset_type
15789 values. The first value is the number of CU indices in the vector.
15790 Each subsequent value is the index of a CU in the CU list. This
15791 element in the hash table is used to indicate which CUs define the
15794 6. The constant pool. This is simply a bunch of bytes. It is
15795 organized so that alignment is correct: CU vectors are stored
15796 first, followed by strings. */
15799 save_gdb_index_command (char *arg
, int from_tty
)
15801 struct objfile
*objfile
;
15804 error (_("usage: save gdb-index DIRECTORY"));
15806 ALL_OBJFILES (objfile
)
15810 /* If the objfile does not correspond to an actual file, skip it. */
15811 if (stat (objfile
->name
, &st
) < 0)
15814 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
15815 if (dwarf2_per_objfile
)
15817 volatile struct gdb_exception except
;
15819 TRY_CATCH (except
, RETURN_MASK_ERROR
)
15821 write_psymtabs_to_index (objfile
, arg
);
15823 if (except
.reason
< 0)
15824 exception_fprintf (gdb_stderr
, except
,
15825 _("Error while writing index for `%s': "),
15833 int dwarf2_always_disassemble
;
15836 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
15837 struct cmd_list_element
*c
, const char *value
)
15839 fprintf_filtered (file
,
15840 _("Whether to always disassemble "
15841 "DWARF expressions is %s.\n"),
15845 void _initialize_dwarf2_read (void);
15848 _initialize_dwarf2_read (void)
15850 struct cmd_list_element
*c
;
15852 dwarf2_objfile_data_key
15853 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
15855 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
15856 Set DWARF 2 specific variables.\n\
15857 Configure DWARF 2 variables such as the cache size"),
15858 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
15859 0/*allow-unknown*/, &maintenance_set_cmdlist
);
15861 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
15862 Show DWARF 2 specific variables\n\
15863 Show DWARF 2 variables such as the cache size"),
15864 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
15865 0/*allow-unknown*/, &maintenance_show_cmdlist
);
15867 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
15868 &dwarf2_max_cache_age
, _("\
15869 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
15870 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
15871 A higher limit means that cached compilation units will be stored\n\
15872 in memory longer, and more total memory will be used. Zero disables\n\
15873 caching, which can slow down startup."),
15875 show_dwarf2_max_cache_age
,
15876 &set_dwarf2_cmdlist
,
15877 &show_dwarf2_cmdlist
);
15879 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
15880 &dwarf2_always_disassemble
, _("\
15881 Set whether `info address' always disassembles DWARF expressions."), _("\
15882 Show whether `info address' always disassembles DWARF expressions."), _("\
15883 When enabled, DWARF expressions are always printed in an assembly-like\n\
15884 syntax. When disabled, expressions will be printed in a more\n\
15885 conversational style, when possible."),
15887 show_dwarf2_always_disassemble
,
15888 &set_dwarf2_cmdlist
,
15889 &show_dwarf2_cmdlist
);
15891 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
15892 Set debugging of the dwarf2 DIE reader."), _("\
15893 Show debugging of the dwarf2 DIE reader."), _("\
15894 When enabled (non-zero), DIEs are dumped after they are read in.\n\
15895 The value is the maximum depth to print."),
15898 &setdebuglist
, &showdebuglist
);
15900 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
15902 Save a gdb-index file.\n\
15903 Usage: save gdb-index DIRECTORY"),
15905 set_cmd_completer (c
, filename_completer
);