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. Version 4
2028 contained incomplete addrmap. So, it seems better to just ignore such
2032 /* Indexes with higher version than the one supported by GDB may be no
2033 longer backward compatible. */
2037 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
2038 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
2040 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2043 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2044 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2048 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2049 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2050 - MAYBE_SWAP (metadata
[i
]))
2054 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2055 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2056 - MAYBE_SWAP (metadata
[i
]));
2059 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2060 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2061 - MAYBE_SWAP (metadata
[i
]))
2062 / (2 * sizeof (offset_type
)));
2065 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2067 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
2070 if (types_list_elements
2071 && !create_signatured_type_table_from_index (objfile
, types_list
,
2072 types_list_elements
))
2075 create_addrmap_from_index (objfile
, map
);
2077 dwarf2_per_objfile
->index_table
= map
;
2078 dwarf2_per_objfile
->using_index
= 1;
2079 dwarf2_per_objfile
->quick_file_names_table
=
2080 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2085 /* A helper for the "quick" functions which sets the global
2086 dwarf2_per_objfile according to OBJFILE. */
2089 dw2_setup (struct objfile
*objfile
)
2091 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2092 gdb_assert (dwarf2_per_objfile
);
2095 /* A helper for the "quick" functions which attempts to read the line
2096 table for THIS_CU. */
2098 static struct quick_file_names
*
2099 dw2_get_file_names (struct objfile
*objfile
,
2100 struct dwarf2_per_cu_data
*this_cu
)
2102 bfd
*abfd
= objfile
->obfd
;
2103 struct line_header
*lh
;
2104 struct attribute
*attr
;
2105 struct cleanup
*cleanups
;
2106 struct die_info
*comp_unit_die
;
2107 struct dwarf2_section_info
* sec
;
2108 gdb_byte
*beg_of_comp_unit
, *info_ptr
, *buffer
;
2109 int has_children
, i
;
2110 struct dwarf2_cu cu
;
2111 unsigned int bytes_read
, buffer_size
;
2112 struct die_reader_specs reader_specs
;
2113 char *name
, *comp_dir
;
2115 struct quick_file_names
*qfn
;
2116 unsigned int line_offset
;
2118 if (this_cu
->v
.quick
->file_names
!= NULL
)
2119 return this_cu
->v
.quick
->file_names
;
2120 /* If we know there is no line data, no point in looking again. */
2121 if (this_cu
->v
.quick
->no_file_data
)
2124 init_one_comp_unit (&cu
, objfile
);
2125 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
2127 if (this_cu
->from_debug_types
)
2128 sec
= &dwarf2_per_objfile
->types
;
2130 sec
= &dwarf2_per_objfile
->info
;
2131 dwarf2_read_section (objfile
, sec
);
2132 buffer_size
= sec
->size
;
2133 buffer
= sec
->buffer
;
2134 info_ptr
= buffer
+ this_cu
->offset
;
2135 beg_of_comp_unit
= info_ptr
;
2137 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
2138 buffer
, buffer_size
,
2141 /* Complete the cu_header. */
2142 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
2143 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2146 cu
.per_cu
= this_cu
;
2148 dwarf2_read_abbrevs (abfd
, &cu
);
2149 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
2151 if (this_cu
->from_debug_types
)
2152 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
2153 init_cu_die_reader (&reader_specs
, &cu
);
2154 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2160 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, &cu
);
2163 struct quick_file_names find_entry
;
2165 line_offset
= DW_UNSND (attr
);
2167 /* We may have already read in this line header (TU line header sharing).
2168 If we have we're done. */
2169 find_entry
.offset
= line_offset
;
2170 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2171 &find_entry
, INSERT
);
2174 do_cleanups (cleanups
);
2175 this_cu
->v
.quick
->file_names
= *slot
;
2179 lh
= dwarf_decode_line_header (line_offset
, abfd
, &cu
);
2183 do_cleanups (cleanups
);
2184 this_cu
->v
.quick
->no_file_data
= 1;
2188 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2189 qfn
->offset
= line_offset
;
2190 gdb_assert (slot
!= NULL
);
2193 find_file_and_directory (comp_unit_die
, &cu
, &name
, &comp_dir
);
2195 qfn
->num_file_names
= lh
->num_file_names
;
2196 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2197 lh
->num_file_names
* sizeof (char *));
2198 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2199 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2200 qfn
->real_names
= NULL
;
2202 free_line_header (lh
);
2203 do_cleanups (cleanups
);
2205 this_cu
->v
.quick
->file_names
= qfn
;
2209 /* A helper for the "quick" functions which computes and caches the
2210 real path for a given file name from the line table. */
2213 dw2_get_real_path (struct objfile
*objfile
,
2214 struct quick_file_names
*qfn
, int index
)
2216 if (qfn
->real_names
== NULL
)
2217 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2218 qfn
->num_file_names
, sizeof (char *));
2220 if (qfn
->real_names
[index
] == NULL
)
2221 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2223 return qfn
->real_names
[index
];
2226 static struct symtab
*
2227 dw2_find_last_source_symtab (struct objfile
*objfile
)
2231 dw2_setup (objfile
);
2232 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2233 return dw2_instantiate_symtab (objfile
, dw2_get_cu (index
));
2236 /* Traversal function for dw2_forget_cached_source_info. */
2239 dw2_free_cached_file_names (void **slot
, void *info
)
2241 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2243 if (file_data
->real_names
)
2247 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2249 xfree ((void*) file_data
->real_names
[i
]);
2250 file_data
->real_names
[i
] = NULL
;
2258 dw2_forget_cached_source_info (struct objfile
*objfile
)
2260 dw2_setup (objfile
);
2262 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
2263 dw2_free_cached_file_names
, NULL
);
2267 dw2_lookup_symtab (struct objfile
*objfile
, const char *name
,
2268 const char *full_path
, const char *real_path
,
2269 struct symtab
**result
)
2272 int check_basename
= lbasename (name
) == name
;
2273 struct dwarf2_per_cu_data
*base_cu
= NULL
;
2275 dw2_setup (objfile
);
2277 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2278 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2281 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2282 struct quick_file_names
*file_data
;
2284 if (per_cu
->v
.quick
->symtab
)
2287 file_data
= dw2_get_file_names (objfile
, per_cu
);
2288 if (file_data
== NULL
)
2291 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2293 const char *this_name
= file_data
->file_names
[j
];
2295 if (FILENAME_CMP (name
, this_name
) == 0)
2297 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2301 if (check_basename
&& ! base_cu
2302 && FILENAME_CMP (lbasename (this_name
), name
) == 0)
2305 if (full_path
!= NULL
)
2307 const char *this_real_name
= dw2_get_real_path (objfile
,
2310 if (this_real_name
!= NULL
2311 && FILENAME_CMP (full_path
, this_real_name
) == 0)
2313 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2318 if (real_path
!= NULL
)
2320 const char *this_real_name
= dw2_get_real_path (objfile
,
2323 if (this_real_name
!= NULL
2324 && FILENAME_CMP (real_path
, this_real_name
) == 0)
2326 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2335 *result
= dw2_instantiate_symtab (objfile
, base_cu
);
2342 static struct symtab
*
2343 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2344 const char *name
, domain_enum domain
)
2346 /* We do all the work in the pre_expand_symtabs_matching hook
2351 /* A helper function that expands all symtabs that hold an object
2355 dw2_do_expand_symtabs_matching (struct objfile
*objfile
, const char *name
)
2357 dw2_setup (objfile
);
2359 /* index_table is NULL if OBJF_READNOW. */
2360 if (dwarf2_per_objfile
->index_table
)
2364 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2367 offset_type i
, len
= MAYBE_SWAP (*vec
);
2368 for (i
= 0; i
< len
; ++i
)
2370 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2371 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2373 dw2_instantiate_symtab (objfile
, per_cu
);
2380 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
2381 int kind
, const char *name
,
2384 dw2_do_expand_symtabs_matching (objfile
, name
);
2388 dw2_print_stats (struct objfile
*objfile
)
2392 dw2_setup (objfile
);
2394 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2395 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2397 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2399 if (!per_cu
->v
.quick
->symtab
)
2402 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2406 dw2_dump (struct objfile
*objfile
)
2408 /* Nothing worth printing. */
2412 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2413 struct section_offsets
*delta
)
2415 /* There's nothing to relocate here. */
2419 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2420 const char *func_name
)
2422 dw2_do_expand_symtabs_matching (objfile
, func_name
);
2426 dw2_expand_all_symtabs (struct objfile
*objfile
)
2430 dw2_setup (objfile
);
2432 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2433 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2435 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2437 dw2_instantiate_symtab (objfile
, per_cu
);
2442 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2443 const char *filename
)
2447 dw2_setup (objfile
);
2449 /* We don't need to consider type units here.
2450 This is only called for examining code, e.g. expand_line_sal.
2451 There can be an order of magnitude (or more) more type units
2452 than comp units, and we avoid them if we can. */
2454 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
2457 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2458 struct quick_file_names
*file_data
;
2460 if (per_cu
->v
.quick
->symtab
)
2463 file_data
= dw2_get_file_names (objfile
, per_cu
);
2464 if (file_data
== NULL
)
2467 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2469 const char *this_name
= file_data
->file_names
[j
];
2470 if (FILENAME_CMP (this_name
, filename
) == 0)
2472 dw2_instantiate_symtab (objfile
, per_cu
);
2480 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2482 struct dwarf2_per_cu_data
*per_cu
;
2484 struct quick_file_names
*file_data
;
2486 dw2_setup (objfile
);
2488 /* index_table is NULL if OBJF_READNOW. */
2489 if (!dwarf2_per_objfile
->index_table
)
2492 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2496 /* Note that this just looks at the very first one named NAME -- but
2497 actually we are looking for a function. find_main_filename
2498 should be rewritten so that it doesn't require a custom hook. It
2499 could just use the ordinary symbol tables. */
2500 /* vec[0] is the length, which must always be >0. */
2501 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[1]));
2503 file_data
= dw2_get_file_names (objfile
, per_cu
);
2504 if (file_data
== NULL
)
2507 return file_data
->file_names
[file_data
->num_file_names
- 1];
2511 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
2512 struct objfile
*objfile
, int global
,
2513 int (*callback
) (struct block
*,
2514 struct symbol
*, void *),
2515 void *data
, symbol_compare_ftype
*match
,
2516 symbol_compare_ftype
*ordered_compare
)
2518 /* Currently unimplemented; used for Ada. The function can be called if the
2519 current language is Ada for a non-Ada objfile using GNU index. As Ada
2520 does not look for non-Ada symbols this function should just return. */
2524 dw2_expand_symtabs_matching (struct objfile
*objfile
,
2525 int (*file_matcher
) (const char *, void *),
2526 int (*name_matcher
) (const char *, void *),
2532 struct mapped_index
*index
;
2534 dw2_setup (objfile
);
2536 /* index_table is NULL if OBJF_READNOW. */
2537 if (!dwarf2_per_objfile
->index_table
)
2539 index
= dwarf2_per_objfile
->index_table
;
2541 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2542 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2545 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2546 struct quick_file_names
*file_data
;
2548 per_cu
->v
.quick
->mark
= 0;
2549 if (per_cu
->v
.quick
->symtab
)
2552 file_data
= dw2_get_file_names (objfile
, per_cu
);
2553 if (file_data
== NULL
)
2556 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2558 if (file_matcher (file_data
->file_names
[j
], data
))
2560 per_cu
->v
.quick
->mark
= 1;
2566 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
2568 offset_type idx
= 2 * iter
;
2570 offset_type
*vec
, vec_len
, vec_idx
;
2572 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
2575 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
2577 if (! (*name_matcher
) (name
, data
))
2580 /* The name was matched, now expand corresponding CUs that were
2582 vec
= (offset_type
*) (index
->constant_pool
2583 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
2584 vec_len
= MAYBE_SWAP (vec
[0]);
2585 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
2587 struct dwarf2_per_cu_data
*per_cu
;
2589 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[vec_idx
+ 1]));
2590 if (per_cu
->v
.quick
->mark
)
2591 dw2_instantiate_symtab (objfile
, per_cu
);
2596 static struct symtab
*
2597 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
2598 struct minimal_symbol
*msymbol
,
2600 struct obj_section
*section
,
2603 struct dwarf2_per_cu_data
*data
;
2605 dw2_setup (objfile
);
2607 if (!objfile
->psymtabs_addrmap
)
2610 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
2614 if (warn_if_readin
&& data
->v
.quick
->symtab
)
2615 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2616 paddress (get_objfile_arch (objfile
), pc
));
2618 return dw2_instantiate_symtab (objfile
, data
);
2622 dw2_map_symbol_names (struct objfile
*objfile
,
2623 void (*fun
) (const char *, void *),
2627 struct mapped_index
*index
;
2629 dw2_setup (objfile
);
2631 /* index_table is NULL if OBJF_READNOW. */
2632 if (!dwarf2_per_objfile
->index_table
)
2634 index
= dwarf2_per_objfile
->index_table
;
2636 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
2638 offset_type idx
= 2 * iter
;
2640 offset_type
*vec
, vec_len
, vec_idx
;
2642 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
2645 name
= (index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]));
2647 (*fun
) (name
, data
);
2652 dw2_map_symbol_filenames (struct objfile
*objfile
,
2653 void (*fun
) (const char *, const char *, void *),
2658 dw2_setup (objfile
);
2660 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2661 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2664 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2665 struct quick_file_names
*file_data
;
2667 if (per_cu
->v
.quick
->symtab
)
2670 file_data
= dw2_get_file_names (objfile
, per_cu
);
2671 if (file_data
== NULL
)
2674 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2676 const char *this_real_name
= dw2_get_real_path (objfile
, file_data
,
2678 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
2684 dw2_has_symbols (struct objfile
*objfile
)
2689 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
2692 dw2_find_last_source_symtab
,
2693 dw2_forget_cached_source_info
,
2696 dw2_pre_expand_symtabs_matching
,
2700 dw2_expand_symtabs_for_function
,
2701 dw2_expand_all_symtabs
,
2702 dw2_expand_symtabs_with_filename
,
2703 dw2_find_symbol_file
,
2704 dw2_map_matching_symbols
,
2705 dw2_expand_symtabs_matching
,
2706 dw2_find_pc_sect_symtab
,
2707 dw2_map_symbol_names
,
2708 dw2_map_symbol_filenames
2711 /* Initialize for reading DWARF for this objfile. Return 0 if this
2712 file will use psymtabs, or 1 if using the GNU index. */
2715 dwarf2_initialize_objfile (struct objfile
*objfile
)
2717 /* If we're about to read full symbols, don't bother with the
2718 indices. In this case we also don't care if some other debug
2719 format is making psymtabs, because they are all about to be
2721 if ((objfile
->flags
& OBJF_READNOW
))
2725 dwarf2_per_objfile
->using_index
= 1;
2726 create_all_comp_units (objfile
);
2727 create_debug_types_hash_table (objfile
);
2728 dwarf2_per_objfile
->quick_file_names_table
=
2729 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2731 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2732 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2734 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2736 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2737 struct dwarf2_per_cu_quick_data
);
2740 /* Return 1 so that gdb sees the "quick" functions. However,
2741 these functions will be no-ops because we will have expanded
2746 if (dwarf2_read_index (objfile
))
2749 dwarf2_build_psymtabs (objfile
);
2755 /* Build a partial symbol table. */
2758 dwarf2_build_psymtabs (struct objfile
*objfile
)
2760 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
2762 init_psymbol_list (objfile
, 1024);
2765 dwarf2_build_psymtabs_hard (objfile
);
2768 /* Return TRUE if OFFSET is within CU_HEADER. */
2771 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
2773 unsigned int bottom
= cu_header
->offset
;
2774 unsigned int top
= (cu_header
->offset
2776 + cu_header
->initial_length_size
);
2778 return (offset
>= bottom
&& offset
< top
);
2781 /* Read in the comp unit header information from the debug_info at info_ptr.
2782 NOTE: This leaves members offset, first_die_offset to be filled in
2786 read_comp_unit_head (struct comp_unit_head
*cu_header
,
2787 gdb_byte
*info_ptr
, bfd
*abfd
)
2790 unsigned int bytes_read
;
2792 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
2793 cu_header
->initial_length_size
= bytes_read
;
2794 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
2795 info_ptr
+= bytes_read
;
2796 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
2798 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
2800 info_ptr
+= bytes_read
;
2801 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
2803 signed_addr
= bfd_get_sign_extend_vma (abfd
);
2804 if (signed_addr
< 0)
2805 internal_error (__FILE__
, __LINE__
,
2806 _("read_comp_unit_head: dwarf from non elf file"));
2807 cu_header
->signed_addr_p
= signed_addr
;
2813 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
2814 gdb_byte
*buffer
, unsigned int buffer_size
,
2817 gdb_byte
*beg_of_comp_unit
= info_ptr
;
2819 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
2821 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
2822 error (_("Dwarf Error: wrong version in compilation unit header "
2823 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
2824 bfd_get_filename (abfd
));
2826 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
2827 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2828 "(offset 0x%lx + 6) [in module %s]"),
2829 (long) header
->abbrev_offset
,
2830 (long) (beg_of_comp_unit
- buffer
),
2831 bfd_get_filename (abfd
));
2833 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
2834 > buffer
+ buffer_size
)
2835 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2836 "(offset 0x%lx + 0) [in module %s]"),
2837 (long) header
->length
,
2838 (long) (beg_of_comp_unit
- buffer
),
2839 bfd_get_filename (abfd
));
2844 /* Read in the types comp unit header information from .debug_types entry at
2845 types_ptr. The result is a pointer to one past the end of the header. */
2848 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
2849 ULONGEST
*signature
,
2850 gdb_byte
*types_ptr
, bfd
*abfd
)
2852 gdb_byte
*initial_types_ptr
= types_ptr
;
2854 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
2855 &dwarf2_per_objfile
->types
);
2856 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
2858 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
2860 *signature
= read_8_bytes (abfd
, types_ptr
);
2862 types_ptr
+= cu_header
->offset_size
;
2863 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
2868 /* Allocate a new partial symtab for file named NAME and mark this new
2869 partial symtab as being an include of PST. */
2872 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
2873 struct objfile
*objfile
)
2875 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
2877 subpst
->section_offsets
= pst
->section_offsets
;
2878 subpst
->textlow
= 0;
2879 subpst
->texthigh
= 0;
2881 subpst
->dependencies
= (struct partial_symtab
**)
2882 obstack_alloc (&objfile
->objfile_obstack
,
2883 sizeof (struct partial_symtab
*));
2884 subpst
->dependencies
[0] = pst
;
2885 subpst
->number_of_dependencies
= 1;
2887 subpst
->globals_offset
= 0;
2888 subpst
->n_global_syms
= 0;
2889 subpst
->statics_offset
= 0;
2890 subpst
->n_static_syms
= 0;
2891 subpst
->symtab
= NULL
;
2892 subpst
->read_symtab
= pst
->read_symtab
;
2895 /* No private part is necessary for include psymtabs. This property
2896 can be used to differentiate between such include psymtabs and
2897 the regular ones. */
2898 subpst
->read_symtab_private
= NULL
;
2901 /* Read the Line Number Program data and extract the list of files
2902 included by the source file represented by PST. Build an include
2903 partial symtab for each of these included files. */
2906 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
2907 struct die_info
*die
,
2908 struct partial_symtab
*pst
)
2910 struct objfile
*objfile
= cu
->objfile
;
2911 bfd
*abfd
= objfile
->obfd
;
2912 struct line_header
*lh
= NULL
;
2913 struct attribute
*attr
;
2915 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2918 unsigned int line_offset
= DW_UNSND (attr
);
2920 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2923 return; /* No linetable, so no includes. */
2925 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
2926 dwarf_decode_lines (lh
, pst
->dirname
, abfd
, cu
, pst
);
2928 free_line_header (lh
);
2932 hash_type_signature (const void *item
)
2934 const struct signatured_type
*type_sig
= item
;
2936 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2937 return type_sig
->signature
;
2941 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
2943 const struct signatured_type
*lhs
= item_lhs
;
2944 const struct signatured_type
*rhs
= item_rhs
;
2946 return lhs
->signature
== rhs
->signature
;
2949 /* Allocate a hash table for signatured types. */
2952 allocate_signatured_type_table (struct objfile
*objfile
)
2954 return htab_create_alloc_ex (41,
2955 hash_type_signature
,
2958 &objfile
->objfile_obstack
,
2959 hashtab_obstack_allocate
,
2960 dummy_obstack_deallocate
);
2963 /* A helper function to add a signatured type CU to a list. */
2966 add_signatured_type_cu_to_list (void **slot
, void *datum
)
2968 struct signatured_type
*sigt
= *slot
;
2969 struct dwarf2_per_cu_data
***datap
= datum
;
2971 **datap
= &sigt
->per_cu
;
2977 /* Create the hash table of all entries in the .debug_types section.
2978 The result is zero if there is an error (e.g. missing .debug_types section),
2979 otherwise non-zero. */
2982 create_debug_types_hash_table (struct objfile
*objfile
)
2986 struct dwarf2_per_cu_data
**iter
;
2988 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
2989 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
2991 if (info_ptr
== NULL
)
2993 dwarf2_per_objfile
->signatured_types
= NULL
;
2997 types_htab
= allocate_signatured_type_table (objfile
);
2999 if (dwarf2_die_debug
)
3000 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
3002 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
3003 + dwarf2_per_objfile
->types
.size
)
3005 unsigned int offset
;
3006 unsigned int offset_size
;
3007 unsigned int type_offset
;
3008 unsigned int length
, initial_length_size
;
3009 unsigned short version
;
3011 struct signatured_type
*type_sig
;
3013 gdb_byte
*ptr
= info_ptr
;
3015 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
3017 /* We need to read the type's signature in order to build the hash
3018 table, but we don't need to read anything else just yet. */
3020 /* Sanity check to ensure entire cu is present. */
3021 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
3022 if (ptr
+ length
+ initial_length_size
3023 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
3025 complaint (&symfile_complaints
,
3026 _("debug type entry runs off end "
3027 "of `.debug_types' section, ignored"));
3031 offset_size
= initial_length_size
== 4 ? 4 : 8;
3032 ptr
+= initial_length_size
;
3033 version
= bfd_get_16 (objfile
->obfd
, ptr
);
3035 ptr
+= offset_size
; /* abbrev offset */
3036 ptr
+= 1; /* address size */
3037 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
3039 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
3041 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
3042 memset (type_sig
, 0, sizeof (*type_sig
));
3043 type_sig
->signature
= signature
;
3044 type_sig
->offset
= offset
;
3045 type_sig
->type_offset
= type_offset
;
3046 type_sig
->per_cu
.objfile
= objfile
;
3047 type_sig
->per_cu
.from_debug_types
= 1;
3049 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
3050 gdb_assert (slot
!= NULL
);
3053 if (dwarf2_die_debug
)
3054 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
3055 offset
, phex (signature
, sizeof (signature
)));
3057 info_ptr
= info_ptr
+ initial_length_size
+ length
;
3060 dwarf2_per_objfile
->signatured_types
= types_htab
;
3062 dwarf2_per_objfile
->n_type_comp_units
= htab_elements (types_htab
);
3063 dwarf2_per_objfile
->type_comp_units
3064 = obstack_alloc (&objfile
->objfile_obstack
,
3065 dwarf2_per_objfile
->n_type_comp_units
3066 * sizeof (struct dwarf2_per_cu_data
*));
3067 iter
= &dwarf2_per_objfile
->type_comp_units
[0];
3068 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_list
, &iter
);
3069 gdb_assert (iter
- &dwarf2_per_objfile
->type_comp_units
[0]
3070 == dwarf2_per_objfile
->n_type_comp_units
);
3075 /* Lookup a signature based type.
3076 Returns NULL if SIG is not present in the table. */
3078 static struct signatured_type
*
3079 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
3081 struct signatured_type find_entry
, *entry
;
3083 if (dwarf2_per_objfile
->signatured_types
== NULL
)
3085 complaint (&symfile_complaints
,
3086 _("missing `.debug_types' section for DW_FORM_sig8 die"));
3090 find_entry
.signature
= sig
;
3091 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
3095 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
3098 init_cu_die_reader (struct die_reader_specs
*reader
,
3099 struct dwarf2_cu
*cu
)
3101 reader
->abfd
= cu
->objfile
->obfd
;
3103 if (cu
->per_cu
->from_debug_types
)
3105 gdb_assert (dwarf2_per_objfile
->types
.readin
);
3106 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
3110 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3111 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
3115 /* Find the base address of the compilation unit for range lists and
3116 location lists. It will normally be specified by DW_AT_low_pc.
3117 In DWARF-3 draft 4, the base address could be overridden by
3118 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3119 compilation units with discontinuous ranges. */
3122 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3124 struct attribute
*attr
;
3127 cu
->base_address
= 0;
3129 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3132 cu
->base_address
= DW_ADDR (attr
);
3137 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3140 cu
->base_address
= DW_ADDR (attr
);
3146 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
3147 to combine the common parts.
3148 Process a compilation unit for a psymtab.
3149 BUFFER is a pointer to the beginning of the dwarf section buffer,
3150 either .debug_info or debug_types.
3151 INFO_PTR is a pointer to the start of the CU.
3152 Returns a pointer to the next CU. */
3155 process_psymtab_comp_unit (struct objfile
*objfile
,
3156 struct dwarf2_per_cu_data
*this_cu
,
3157 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
3158 unsigned int buffer_size
)
3160 bfd
*abfd
= objfile
->obfd
;
3161 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3162 struct die_info
*comp_unit_die
;
3163 struct partial_symtab
*pst
;
3165 struct cleanup
*back_to_inner
;
3166 struct dwarf2_cu cu
;
3167 int has_children
, has_pc_info
;
3168 struct attribute
*attr
;
3169 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
3170 struct die_reader_specs reader_specs
;
3172 init_one_comp_unit (&cu
, objfile
);
3173 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
3175 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
3176 buffer
, buffer_size
,
3179 /* Complete the cu_header. */
3180 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
3181 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3183 cu
.list_in_scope
= &file_symbols
;
3185 /* If this compilation unit was already read in, free the
3186 cached copy in order to read it in again. This is
3187 necessary because we skipped some symbols when we first
3188 read in the compilation unit (see load_partial_dies).
3189 This problem could be avoided, but the benefit is
3191 if (this_cu
->cu
!= NULL
)
3192 free_one_cached_comp_unit (this_cu
->cu
);
3194 /* Note that this is a pointer to our stack frame, being
3195 added to a global data structure. It will be cleaned up
3196 in free_stack_comp_unit when we finish with this
3197 compilation unit. */
3199 cu
.per_cu
= this_cu
;
3201 /* Read the abbrevs for this compilation unit into a table. */
3202 dwarf2_read_abbrevs (abfd
, &cu
);
3203 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
3205 /* Read the compilation unit die. */
3206 if (this_cu
->from_debug_types
)
3207 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
3208 init_cu_die_reader (&reader_specs
, &cu
);
3209 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3212 if (this_cu
->from_debug_types
)
3214 /* offset,length haven't been set yet for type units. */
3215 this_cu
->offset
= cu
.header
.offset
;
3216 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
3218 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3220 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3221 + cu
.header
.initial_length_size
);
3222 do_cleanups (back_to_inner
);
3226 prepare_one_comp_unit (&cu
, comp_unit_die
);
3228 /* Allocate a new partial symbol table structure. */
3229 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
3230 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
3231 (attr
!= NULL
) ? DW_STRING (attr
) : "",
3232 /* TEXTLOW and TEXTHIGH are set below. */
3234 objfile
->global_psymbols
.next
,
3235 objfile
->static_psymbols
.next
);
3237 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
3239 pst
->dirname
= DW_STRING (attr
);
3241 pst
->read_symtab_private
= this_cu
;
3243 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3245 /* Store the function that reads in the rest of the symbol table. */
3246 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
3248 this_cu
->v
.psymtab
= pst
;
3250 dwarf2_find_base_address (comp_unit_die
, &cu
);
3252 /* Possibly set the default values of LOWPC and HIGHPC from
3254 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
3255 &best_highpc
, &cu
, pst
);
3256 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
3257 /* Store the contiguous range if it is not empty; it can be empty for
3258 CUs with no code. */
3259 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3260 best_lowpc
+ baseaddr
,
3261 best_highpc
+ baseaddr
- 1, pst
);
3263 /* Check if comp unit has_children.
3264 If so, read the rest of the partial symbols from this comp unit.
3265 If not, there's no more debug_info for this comp unit. */
3268 struct partial_die_info
*first_die
;
3269 CORE_ADDR lowpc
, highpc
;
3271 lowpc
= ((CORE_ADDR
) -1);
3272 highpc
= ((CORE_ADDR
) 0);
3274 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
3276 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
3277 ! has_pc_info
, &cu
);
3279 /* If we didn't find a lowpc, set it to highpc to avoid
3280 complaints from `maint check'. */
3281 if (lowpc
== ((CORE_ADDR
) -1))
3284 /* If the compilation unit didn't have an explicit address range,
3285 then use the information extracted from its child dies. */
3289 best_highpc
= highpc
;
3292 pst
->textlow
= best_lowpc
+ baseaddr
;
3293 pst
->texthigh
= best_highpc
+ baseaddr
;
3295 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
3296 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
3297 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
3298 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
3299 sort_pst_symbols (pst
);
3301 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3302 + cu
.header
.initial_length_size
);
3304 if (this_cu
->from_debug_types
)
3306 /* It's not clear we want to do anything with stmt lists here.
3307 Waiting to see what gcc ultimately does. */
3311 /* Get the list of files included in the current compilation unit,
3312 and build a psymtab for each of them. */
3313 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
3316 do_cleanups (back_to_inner
);
3321 /* Traversal function for htab_traverse_noresize.
3322 Process one .debug_types comp-unit. */
3325 process_type_comp_unit (void **slot
, void *info
)
3327 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
3328 struct objfile
*objfile
= (struct objfile
*) info
;
3329 struct dwarf2_per_cu_data
*this_cu
;
3331 this_cu
= &entry
->per_cu
;
3333 gdb_assert (dwarf2_per_objfile
->types
.readin
);
3334 process_psymtab_comp_unit (objfile
, this_cu
,
3335 dwarf2_per_objfile
->types
.buffer
,
3336 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
3337 dwarf2_per_objfile
->types
.size
);
3342 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3343 Build partial symbol tables for the .debug_types comp-units. */
3346 build_type_psymtabs (struct objfile
*objfile
)
3348 if (! create_debug_types_hash_table (objfile
))
3351 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
3352 process_type_comp_unit
, objfile
);
3355 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3358 psymtabs_addrmap_cleanup (void *o
)
3360 struct objfile
*objfile
= o
;
3362 objfile
->psymtabs_addrmap
= NULL
;
3365 /* Build the partial symbol table by doing a quick pass through the
3366 .debug_info and .debug_abbrev sections. */
3369 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
3372 struct cleanup
*back_to
, *addrmap_cleanup
;
3373 struct obstack temp_obstack
;
3375 dwarf2_per_objfile
->reading_partial_symbols
= 1;
3377 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3378 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3380 /* Any cached compilation units will be linked by the per-objfile
3381 read_in_chain. Make sure to free them when we're done. */
3382 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3384 build_type_psymtabs (objfile
);
3386 create_all_comp_units (objfile
);
3388 /* Create a temporary address map on a temporary obstack. We later
3389 copy this to the final obstack. */
3390 obstack_init (&temp_obstack
);
3391 make_cleanup_obstack_free (&temp_obstack
);
3392 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
3393 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
3395 /* Since the objects we're extracting from .debug_info vary in
3396 length, only the individual functions to extract them (like
3397 read_comp_unit_head and load_partial_die) can really know whether
3398 the buffer is large enough to hold another complete object.
3400 At the moment, they don't actually check that. If .debug_info
3401 holds just one extra byte after the last compilation unit's dies,
3402 then read_comp_unit_head will happily read off the end of the
3403 buffer. read_partial_die is similarly casual. Those functions
3406 For this loop condition, simply checking whether there's any data
3407 left at all should be sufficient. */
3409 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
3410 + dwarf2_per_objfile
->info
.size
))
3412 struct dwarf2_per_cu_data
*this_cu
;
3414 this_cu
= dwarf2_find_comp_unit (info_ptr
3415 - dwarf2_per_objfile
->info
.buffer
,
3418 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
3419 dwarf2_per_objfile
->info
.buffer
,
3421 dwarf2_per_objfile
->info
.size
);
3424 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
3425 &objfile
->objfile_obstack
);
3426 discard_cleanups (addrmap_cleanup
);
3428 do_cleanups (back_to
);
3431 /* Load the partial DIEs for a secondary CU into memory. */
3434 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
3435 struct objfile
*objfile
)
3437 bfd
*abfd
= objfile
->obfd
;
3438 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3439 struct die_info
*comp_unit_die
;
3440 struct dwarf2_cu
*cu
;
3441 struct cleanup
*free_abbrevs_cleanup
, *free_cu_cleanup
= NULL
;
3443 struct die_reader_specs reader_specs
;
3446 gdb_assert (! this_cu
->from_debug_types
);
3448 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3449 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
3450 beg_of_comp_unit
= info_ptr
;
3452 if (this_cu
->cu
== NULL
)
3454 cu
= xmalloc (sizeof (*cu
));
3455 init_one_comp_unit (cu
, objfile
);
3459 /* If an error occurs while loading, release our storage. */
3460 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3462 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
3463 dwarf2_per_objfile
->info
.buffer
,
3464 dwarf2_per_objfile
->info
.size
,
3467 /* Complete the cu_header. */
3468 cu
->header
.offset
= this_cu
->offset
;
3469 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3471 /* Link this compilation unit into the compilation unit tree. */
3473 cu
->per_cu
= this_cu
;
3475 /* Link this CU into read_in_chain. */
3476 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3477 dwarf2_per_objfile
->read_in_chain
= this_cu
;
3482 info_ptr
+= cu
->header
.first_die_offset
;
3485 /* Read the abbrevs for this compilation unit into a table. */
3486 gdb_assert (cu
->dwarf2_abbrevs
== NULL
);
3487 dwarf2_read_abbrevs (abfd
, cu
);
3488 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3490 /* Read the compilation unit die. */
3491 init_cu_die_reader (&reader_specs
, cu
);
3492 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3495 prepare_one_comp_unit (cu
, comp_unit_die
);
3497 /* Check if comp unit has_children.
3498 If so, read the rest of the partial symbols from this comp unit.
3499 If not, there's no more debug_info for this comp unit. */
3501 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
3503 do_cleanups (free_abbrevs_cleanup
);
3507 /* We've successfully allocated this compilation unit. Let our
3508 caller clean it up when finished with it. */
3509 discard_cleanups (free_cu_cleanup
);
3513 /* Create a list of all compilation units in OBJFILE. We do this only
3514 if an inter-comp-unit reference is found; presumably if there is one,
3515 there will be many, and one will occur early in the .debug_info section.
3516 So there's no point in building this list incrementally. */
3519 create_all_comp_units (struct objfile
*objfile
)
3523 struct dwarf2_per_cu_data
**all_comp_units
;
3526 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3527 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3531 all_comp_units
= xmalloc (n_allocated
3532 * sizeof (struct dwarf2_per_cu_data
*));
3534 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
3535 + dwarf2_per_objfile
->info
.size
)
3537 unsigned int length
, initial_length_size
;
3538 struct dwarf2_per_cu_data
*this_cu
;
3539 unsigned int offset
;
3541 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
3543 /* Read just enough information to find out where the next
3544 compilation unit is. */
3545 length
= read_initial_length (objfile
->obfd
, info_ptr
,
3546 &initial_length_size
);
3548 /* Save the compilation unit for later lookup. */
3549 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
3550 sizeof (struct dwarf2_per_cu_data
));
3551 memset (this_cu
, 0, sizeof (*this_cu
));
3552 this_cu
->offset
= offset
;
3553 this_cu
->length
= length
+ initial_length_size
;
3554 this_cu
->objfile
= objfile
;
3556 if (n_comp_units
== n_allocated
)
3559 all_comp_units
= xrealloc (all_comp_units
,
3561 * sizeof (struct dwarf2_per_cu_data
*));
3563 all_comp_units
[n_comp_units
++] = this_cu
;
3565 info_ptr
= info_ptr
+ this_cu
->length
;
3568 dwarf2_per_objfile
->all_comp_units
3569 = obstack_alloc (&objfile
->objfile_obstack
,
3570 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3571 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
3572 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3573 xfree (all_comp_units
);
3574 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
3577 /* Process all loaded DIEs for compilation unit CU, starting at
3578 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3579 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3580 DW_AT_ranges). If NEED_PC is set, then this function will set
3581 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3582 and record the covered ranges in the addrmap. */
3585 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
3586 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3588 struct partial_die_info
*pdi
;
3590 /* Now, march along the PDI's, descending into ones which have
3591 interesting children but skipping the children of the other ones,
3592 until we reach the end of the compilation unit. */
3598 fixup_partial_die (pdi
, cu
);
3600 /* Anonymous namespaces or modules have no name but have interesting
3601 children, so we need to look at them. Ditto for anonymous
3604 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
3605 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
3609 case DW_TAG_subprogram
:
3610 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3612 case DW_TAG_constant
:
3613 case DW_TAG_variable
:
3614 case DW_TAG_typedef
:
3615 case DW_TAG_union_type
:
3616 if (!pdi
->is_declaration
)
3618 add_partial_symbol (pdi
, cu
);
3621 case DW_TAG_class_type
:
3622 case DW_TAG_interface_type
:
3623 case DW_TAG_structure_type
:
3624 if (!pdi
->is_declaration
)
3626 add_partial_symbol (pdi
, cu
);
3629 case DW_TAG_enumeration_type
:
3630 if (!pdi
->is_declaration
)
3631 add_partial_enumeration (pdi
, cu
);
3633 case DW_TAG_base_type
:
3634 case DW_TAG_subrange_type
:
3635 /* File scope base type definitions are added to the partial
3637 add_partial_symbol (pdi
, cu
);
3639 case DW_TAG_namespace
:
3640 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
3643 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
3650 /* If the die has a sibling, skip to the sibling. */
3652 pdi
= pdi
->die_sibling
;
3656 /* Functions used to compute the fully scoped name of a partial DIE.
3658 Normally, this is simple. For C++, the parent DIE's fully scoped
3659 name is concatenated with "::" and the partial DIE's name. For
3660 Java, the same thing occurs except that "." is used instead of "::".
3661 Enumerators are an exception; they use the scope of their parent
3662 enumeration type, i.e. the name of the enumeration type is not
3663 prepended to the enumerator.
3665 There are two complexities. One is DW_AT_specification; in this
3666 case "parent" means the parent of the target of the specification,
3667 instead of the direct parent of the DIE. The other is compilers
3668 which do not emit DW_TAG_namespace; in this case we try to guess
3669 the fully qualified name of structure types from their members'
3670 linkage names. This must be done using the DIE's children rather
3671 than the children of any DW_AT_specification target. We only need
3672 to do this for structures at the top level, i.e. if the target of
3673 any DW_AT_specification (if any; otherwise the DIE itself) does not
3676 /* Compute the scope prefix associated with PDI's parent, in
3677 compilation unit CU. The result will be allocated on CU's
3678 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3679 field. NULL is returned if no prefix is necessary. */
3681 partial_die_parent_scope (struct partial_die_info
*pdi
,
3682 struct dwarf2_cu
*cu
)
3684 char *grandparent_scope
;
3685 struct partial_die_info
*parent
, *real_pdi
;
3687 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3688 then this means the parent of the specification DIE. */
3691 while (real_pdi
->has_specification
)
3692 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3694 parent
= real_pdi
->die_parent
;
3698 if (parent
->scope_set
)
3699 return parent
->scope
;
3701 fixup_partial_die (parent
, cu
);
3703 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
3705 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3706 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3707 Work around this problem here. */
3708 if (cu
->language
== language_cplus
3709 && parent
->tag
== DW_TAG_namespace
3710 && strcmp (parent
->name
, "::") == 0
3711 && grandparent_scope
== NULL
)
3713 parent
->scope
= NULL
;
3714 parent
->scope_set
= 1;
3718 if (parent
->tag
== DW_TAG_namespace
3719 || parent
->tag
== DW_TAG_module
3720 || parent
->tag
== DW_TAG_structure_type
3721 || parent
->tag
== DW_TAG_class_type
3722 || parent
->tag
== DW_TAG_interface_type
3723 || parent
->tag
== DW_TAG_union_type
3724 || parent
->tag
== DW_TAG_enumeration_type
)
3726 if (grandparent_scope
== NULL
)
3727 parent
->scope
= parent
->name
;
3729 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
3731 parent
->name
, 0, cu
);
3733 else if (parent
->tag
== DW_TAG_enumerator
)
3734 /* Enumerators should not get the name of the enumeration as a prefix. */
3735 parent
->scope
= grandparent_scope
;
3738 /* FIXME drow/2004-04-01: What should we be doing with
3739 function-local names? For partial symbols, we should probably be
3741 complaint (&symfile_complaints
,
3742 _("unhandled containing DIE tag %d for DIE at %d"),
3743 parent
->tag
, pdi
->offset
);
3744 parent
->scope
= grandparent_scope
;
3747 parent
->scope_set
= 1;
3748 return parent
->scope
;
3751 /* Return the fully scoped name associated with PDI, from compilation unit
3752 CU. The result will be allocated with malloc. */
3754 partial_die_full_name (struct partial_die_info
*pdi
,
3755 struct dwarf2_cu
*cu
)
3759 /* If this is a template instantiation, we can not work out the
3760 template arguments from partial DIEs. So, unfortunately, we have
3761 to go through the full DIEs. At least any work we do building
3762 types here will be reused if full symbols are loaded later. */
3763 if (pdi
->has_template_arguments
)
3765 fixup_partial_die (pdi
, cu
);
3767 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
3769 struct die_info
*die
;
3770 struct attribute attr
;
3771 struct dwarf2_cu
*ref_cu
= cu
;
3774 attr
.form
= DW_FORM_ref_addr
;
3775 attr
.u
.addr
= pdi
->offset
;
3776 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
3778 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
3782 parent_scope
= partial_die_parent_scope (pdi
, cu
);
3783 if (parent_scope
== NULL
)
3786 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
3790 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
3792 struct objfile
*objfile
= cu
->objfile
;
3794 char *actual_name
= NULL
;
3795 const struct partial_symbol
*psym
= NULL
;
3797 int built_actual_name
= 0;
3799 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3801 actual_name
= partial_die_full_name (pdi
, cu
);
3803 built_actual_name
= 1;
3805 if (actual_name
== NULL
)
3806 actual_name
= pdi
->name
;
3810 case DW_TAG_subprogram
:
3811 if (pdi
->is_external
|| cu
->language
== language_ada
)
3813 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3814 of the global scope. But in Ada, we want to be able to access
3815 nested procedures globally. So all Ada subprograms are stored
3816 in the global scope. */
3817 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3818 mst_text, objfile); */
3819 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3821 VAR_DOMAIN
, LOC_BLOCK
,
3822 &objfile
->global_psymbols
,
3823 0, pdi
->lowpc
+ baseaddr
,
3824 cu
->language
, objfile
);
3828 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3829 mst_file_text, objfile); */
3830 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3832 VAR_DOMAIN
, LOC_BLOCK
,
3833 &objfile
->static_psymbols
,
3834 0, pdi
->lowpc
+ baseaddr
,
3835 cu
->language
, objfile
);
3838 case DW_TAG_constant
:
3840 struct psymbol_allocation_list
*list
;
3842 if (pdi
->is_external
)
3843 list
= &objfile
->global_psymbols
;
3845 list
= &objfile
->static_psymbols
;
3846 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3847 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
3848 list
, 0, 0, cu
->language
, objfile
);
3852 case DW_TAG_variable
:
3854 addr
= decode_locdesc (pdi
->locdesc
, cu
);
3858 && !dwarf2_per_objfile
->has_section_at_zero
)
3860 /* A global or static variable may also have been stripped
3861 out by the linker if unused, in which case its address
3862 will be nullified; do not add such variables into partial
3863 symbol table then. */
3865 else if (pdi
->is_external
)
3868 Don't enter into the minimal symbol tables as there is
3869 a minimal symbol table entry from the ELF symbols already.
3870 Enter into partial symbol table if it has a location
3871 descriptor or a type.
3872 If the location descriptor is missing, new_symbol will create
3873 a LOC_UNRESOLVED symbol, the address of the variable will then
3874 be determined from the minimal symbol table whenever the variable
3876 The address for the partial symbol table entry is not
3877 used by GDB, but it comes in handy for debugging partial symbol
3880 if (pdi
->locdesc
|| pdi
->has_type
)
3881 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3883 VAR_DOMAIN
, LOC_STATIC
,
3884 &objfile
->global_psymbols
,
3886 cu
->language
, objfile
);
3890 /* Static Variable. Skip symbols without location descriptors. */
3891 if (pdi
->locdesc
== NULL
)
3893 if (built_actual_name
)
3894 xfree (actual_name
);
3897 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
3898 mst_file_data, objfile); */
3899 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3901 VAR_DOMAIN
, LOC_STATIC
,
3902 &objfile
->static_psymbols
,
3904 cu
->language
, objfile
);
3907 case DW_TAG_typedef
:
3908 case DW_TAG_base_type
:
3909 case DW_TAG_subrange_type
:
3910 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3912 VAR_DOMAIN
, LOC_TYPEDEF
,
3913 &objfile
->static_psymbols
,
3914 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3916 case DW_TAG_namespace
:
3917 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3919 VAR_DOMAIN
, LOC_TYPEDEF
,
3920 &objfile
->global_psymbols
,
3921 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3923 case DW_TAG_class_type
:
3924 case DW_TAG_interface_type
:
3925 case DW_TAG_structure_type
:
3926 case DW_TAG_union_type
:
3927 case DW_TAG_enumeration_type
:
3928 /* Skip external references. The DWARF standard says in the section
3929 about "Structure, Union, and Class Type Entries": "An incomplete
3930 structure, union or class type is represented by a structure,
3931 union or class entry that does not have a byte size attribute
3932 and that has a DW_AT_declaration attribute." */
3933 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
3935 if (built_actual_name
)
3936 xfree (actual_name
);
3940 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3941 static vs. global. */
3942 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3944 STRUCT_DOMAIN
, LOC_TYPEDEF
,
3945 (cu
->language
== language_cplus
3946 || cu
->language
== language_java
)
3947 ? &objfile
->global_psymbols
3948 : &objfile
->static_psymbols
,
3949 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3952 case DW_TAG_enumerator
:
3953 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3955 VAR_DOMAIN
, LOC_CONST
,
3956 (cu
->language
== language_cplus
3957 || cu
->language
== language_java
)
3958 ? &objfile
->global_psymbols
3959 : &objfile
->static_psymbols
,
3960 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3966 if (built_actual_name
)
3967 xfree (actual_name
);
3970 /* Read a partial die corresponding to a namespace; also, add a symbol
3971 corresponding to that namespace to the symbol table. NAMESPACE is
3972 the name of the enclosing namespace. */
3975 add_partial_namespace (struct partial_die_info
*pdi
,
3976 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3977 int need_pc
, struct dwarf2_cu
*cu
)
3979 /* Add a symbol for the namespace. */
3981 add_partial_symbol (pdi
, cu
);
3983 /* Now scan partial symbols in that namespace. */
3985 if (pdi
->has_children
)
3986 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
3989 /* Read a partial die corresponding to a Fortran module. */
3992 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
3993 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3995 /* Now scan partial symbols in that module. */
3997 if (pdi
->has_children
)
3998 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4001 /* Read a partial die corresponding to a subprogram and create a partial
4002 symbol for that subprogram. When the CU language allows it, this
4003 routine also defines a partial symbol for each nested subprogram
4004 that this subprogram contains.
4006 DIE my also be a lexical block, in which case we simply search
4007 recursively for suprograms defined inside that lexical block.
4008 Again, this is only performed when the CU language allows this
4009 type of definitions. */
4012 add_partial_subprogram (struct partial_die_info
*pdi
,
4013 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4014 int need_pc
, struct dwarf2_cu
*cu
)
4016 if (pdi
->tag
== DW_TAG_subprogram
)
4018 if (pdi
->has_pc_info
)
4020 if (pdi
->lowpc
< *lowpc
)
4021 *lowpc
= pdi
->lowpc
;
4022 if (pdi
->highpc
> *highpc
)
4023 *highpc
= pdi
->highpc
;
4027 struct objfile
*objfile
= cu
->objfile
;
4029 baseaddr
= ANOFFSET (objfile
->section_offsets
,
4030 SECT_OFF_TEXT (objfile
));
4031 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4032 pdi
->lowpc
+ baseaddr
,
4033 pdi
->highpc
- 1 + baseaddr
,
4034 cu
->per_cu
->v
.psymtab
);
4036 if (!pdi
->is_declaration
)
4037 /* Ignore subprogram DIEs that do not have a name, they are
4038 illegal. Do not emit a complaint at this point, we will
4039 do so when we convert this psymtab into a symtab. */
4041 add_partial_symbol (pdi
, cu
);
4045 if (! pdi
->has_children
)
4048 if (cu
->language
== language_ada
)
4050 pdi
= pdi
->die_child
;
4053 fixup_partial_die (pdi
, cu
);
4054 if (pdi
->tag
== DW_TAG_subprogram
4055 || pdi
->tag
== DW_TAG_lexical_block
)
4056 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
4057 pdi
= pdi
->die_sibling
;
4062 /* Read a partial die corresponding to an enumeration type. */
4065 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
4066 struct dwarf2_cu
*cu
)
4068 struct partial_die_info
*pdi
;
4070 if (enum_pdi
->name
!= NULL
)
4071 add_partial_symbol (enum_pdi
, cu
);
4073 pdi
= enum_pdi
->die_child
;
4076 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
4077 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
4079 add_partial_symbol (pdi
, cu
);
4080 pdi
= pdi
->die_sibling
;
4084 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
4085 Return the corresponding abbrev, or NULL if the number is zero (indicating
4086 an empty DIE). In either case *BYTES_READ will be set to the length of
4087 the initial number. */
4089 static struct abbrev_info
*
4090 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
4091 struct dwarf2_cu
*cu
)
4093 bfd
*abfd
= cu
->objfile
->obfd
;
4094 unsigned int abbrev_number
;
4095 struct abbrev_info
*abbrev
;
4097 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
4099 if (abbrev_number
== 0)
4102 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
4105 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
4106 abbrev_number
, bfd_get_filename (abfd
));
4112 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4113 Returns a pointer to the end of a series of DIEs, terminated by an empty
4114 DIE. Any children of the skipped DIEs will also be skipped. */
4117 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
4119 struct abbrev_info
*abbrev
;
4120 unsigned int bytes_read
;
4124 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
4126 return info_ptr
+ bytes_read
;
4128 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
4132 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4133 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4134 abbrev corresponding to that skipped uleb128 should be passed in
4135 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4139 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4140 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
4142 unsigned int bytes_read
;
4143 struct attribute attr
;
4144 bfd
*abfd
= cu
->objfile
->obfd
;
4145 unsigned int form
, i
;
4147 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
4149 /* The only abbrev we care about is DW_AT_sibling. */
4150 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
4152 read_attribute (&attr
, &abbrev
->attrs
[i
],
4153 abfd
, info_ptr
, cu
);
4154 if (attr
.form
== DW_FORM_ref_addr
)
4155 complaint (&symfile_complaints
,
4156 _("ignoring absolute DW_AT_sibling"));
4158 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
4161 /* If it isn't DW_AT_sibling, skip this attribute. */
4162 form
= abbrev
->attrs
[i
].form
;
4166 case DW_FORM_ref_addr
:
4167 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4168 and later it is offset sized. */
4169 if (cu
->header
.version
== 2)
4170 info_ptr
+= cu
->header
.addr_size
;
4172 info_ptr
+= cu
->header
.offset_size
;
4175 info_ptr
+= cu
->header
.addr_size
;
4182 case DW_FORM_flag_present
:
4197 case DW_FORM_string
:
4198 read_direct_string (abfd
, info_ptr
, &bytes_read
);
4199 info_ptr
+= bytes_read
;
4201 case DW_FORM_sec_offset
:
4203 info_ptr
+= cu
->header
.offset_size
;
4205 case DW_FORM_exprloc
:
4207 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4208 info_ptr
+= bytes_read
;
4210 case DW_FORM_block1
:
4211 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
4213 case DW_FORM_block2
:
4214 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
4216 case DW_FORM_block4
:
4217 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
4221 case DW_FORM_ref_udata
:
4222 info_ptr
= skip_leb128 (abfd
, info_ptr
);
4224 case DW_FORM_indirect
:
4225 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4226 info_ptr
+= bytes_read
;
4227 /* We need to continue parsing from here, so just go back to
4229 goto skip_attribute
;
4232 error (_("Dwarf Error: Cannot handle %s "
4233 "in DWARF reader [in module %s]"),
4234 dwarf_form_name (form
),
4235 bfd_get_filename (abfd
));
4239 if (abbrev
->has_children
)
4240 return skip_children (buffer
, info_ptr
, cu
);
4245 /* Locate ORIG_PDI's sibling.
4246 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4250 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
4251 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4252 bfd
*abfd
, struct dwarf2_cu
*cu
)
4254 /* Do we know the sibling already? */
4256 if (orig_pdi
->sibling
)
4257 return orig_pdi
->sibling
;
4259 /* Are there any children to deal with? */
4261 if (!orig_pdi
->has_children
)
4264 /* Skip the children the long way. */
4266 return skip_children (buffer
, info_ptr
, cu
);
4269 /* Expand this partial symbol table into a full symbol table. */
4272 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
4278 warning (_("bug: psymtab for %s is already read in."),
4285 printf_filtered (_("Reading in symbols for %s..."),
4287 gdb_flush (gdb_stdout
);
4290 /* Restore our global data. */
4291 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
4292 dwarf2_objfile_data_key
);
4294 /* If this psymtab is constructed from a debug-only objfile, the
4295 has_section_at_zero flag will not necessarily be correct. We
4296 can get the correct value for this flag by looking at the data
4297 associated with the (presumably stripped) associated objfile. */
4298 if (pst
->objfile
->separate_debug_objfile_backlink
)
4300 struct dwarf2_per_objfile
*dpo_backlink
4301 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
4302 dwarf2_objfile_data_key
);
4304 dwarf2_per_objfile
->has_section_at_zero
4305 = dpo_backlink
->has_section_at_zero
;
4308 dwarf2_per_objfile
->reading_partial_symbols
= 0;
4310 psymtab_to_symtab_1 (pst
);
4312 /* Finish up the debug error message. */
4314 printf_filtered (_("done.\n"));
4319 /* Add PER_CU to the queue. */
4322 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4324 struct dwarf2_queue_item
*item
;
4327 item
= xmalloc (sizeof (*item
));
4328 item
->per_cu
= per_cu
;
4331 if (dwarf2_queue
== NULL
)
4332 dwarf2_queue
= item
;
4334 dwarf2_queue_tail
->next
= item
;
4336 dwarf2_queue_tail
= item
;
4339 /* Process the queue. */
4342 process_queue (struct objfile
*objfile
)
4344 struct dwarf2_queue_item
*item
, *next_item
;
4346 /* The queue starts out with one item, but following a DIE reference
4347 may load a new CU, adding it to the end of the queue. */
4348 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
4350 if (dwarf2_per_objfile
->using_index
4351 ? !item
->per_cu
->v
.quick
->symtab
4352 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
4353 process_full_comp_unit (item
->per_cu
);
4355 item
->per_cu
->queued
= 0;
4356 next_item
= item
->next
;
4360 dwarf2_queue_tail
= NULL
;
4363 /* Free all allocated queue entries. This function only releases anything if
4364 an error was thrown; if the queue was processed then it would have been
4365 freed as we went along. */
4368 dwarf2_release_queue (void *dummy
)
4370 struct dwarf2_queue_item
*item
, *last
;
4372 item
= dwarf2_queue
;
4375 /* Anything still marked queued is likely to be in an
4376 inconsistent state, so discard it. */
4377 if (item
->per_cu
->queued
)
4379 if (item
->per_cu
->cu
!= NULL
)
4380 free_one_cached_comp_unit (item
->per_cu
->cu
);
4381 item
->per_cu
->queued
= 0;
4389 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
4392 /* Read in full symbols for PST, and anything it depends on. */
4395 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
4397 struct dwarf2_per_cu_data
*per_cu
;
4398 struct cleanup
*back_to
;
4401 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
4402 if (!pst
->dependencies
[i
]->readin
)
4404 /* Inform about additional files that need to be read in. */
4407 /* FIXME: i18n: Need to make this a single string. */
4408 fputs_filtered (" ", gdb_stdout
);
4410 fputs_filtered ("and ", gdb_stdout
);
4412 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
4413 wrap_here (""); /* Flush output. */
4414 gdb_flush (gdb_stdout
);
4416 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
4419 per_cu
= pst
->read_symtab_private
;
4423 /* It's an include file, no symbols to read for it.
4424 Everything is in the parent symtab. */
4429 dw2_do_instantiate_symtab (pst
->objfile
, per_cu
);
4432 /* Load the DIEs associated with PER_CU into memory. */
4435 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
4436 struct objfile
*objfile
)
4438 bfd
*abfd
= objfile
->obfd
;
4439 struct dwarf2_cu
*cu
;
4440 unsigned int offset
;
4441 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
4442 struct cleanup
*free_abbrevs_cleanup
= NULL
, *free_cu_cleanup
= NULL
;
4443 struct attribute
*attr
;
4446 gdb_assert (! per_cu
->from_debug_types
);
4448 /* Set local variables from the partial symbol table info. */
4449 offset
= per_cu
->offset
;
4451 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4452 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
4453 beg_of_comp_unit
= info_ptr
;
4455 if (per_cu
->cu
== NULL
)
4457 cu
= xmalloc (sizeof (*cu
));
4458 init_one_comp_unit (cu
, objfile
);
4462 /* If an error occurs while loading, release our storage. */
4463 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
4465 /* Read in the comp_unit header. */
4466 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
4468 /* Complete the cu_header. */
4469 cu
->header
.offset
= offset
;
4470 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
4472 /* Read the abbrevs for this compilation unit. */
4473 dwarf2_read_abbrevs (abfd
, cu
);
4474 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
4476 /* Link this compilation unit into the compilation unit tree. */
4478 cu
->per_cu
= per_cu
;
4480 /* Link this CU into read_in_chain. */
4481 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4482 dwarf2_per_objfile
->read_in_chain
= per_cu
;
4487 info_ptr
+= cu
->header
.first_die_offset
;
4490 cu
->dies
= read_comp_unit (info_ptr
, cu
);
4492 /* We try not to read any attributes in this function, because not
4493 all objfiles needed for references have been loaded yet, and symbol
4494 table processing isn't initialized. But we have to set the CU language,
4495 or we won't be able to build types correctly. */
4496 prepare_one_comp_unit (cu
, cu
->dies
);
4498 /* Similarly, if we do not read the producer, we can not apply
4499 producer-specific interpretation. */
4500 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
4502 cu
->producer
= DW_STRING (attr
);
4506 do_cleanups (free_abbrevs_cleanup
);
4508 /* We've successfully allocated this compilation unit. Let our
4509 caller clean it up when finished with it. */
4510 discard_cleanups (free_cu_cleanup
);
4514 /* Add a DIE to the delayed physname list. */
4517 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
4518 const char *name
, struct die_info
*die
,
4519 struct dwarf2_cu
*cu
)
4521 struct delayed_method_info mi
;
4523 mi
.fnfield_index
= fnfield_index
;
4527 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
4530 /* A cleanup for freeing the delayed method list. */
4533 free_delayed_list (void *ptr
)
4535 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
4536 if (cu
->method_list
!= NULL
)
4538 VEC_free (delayed_method_info
, cu
->method_list
);
4539 cu
->method_list
= NULL
;
4543 /* Compute the physnames of any methods on the CU's method list.
4545 The computation of method physnames is delayed in order to avoid the
4546 (bad) condition that one of the method's formal parameters is of an as yet
4550 compute_delayed_physnames (struct dwarf2_cu
*cu
)
4553 struct delayed_method_info
*mi
;
4554 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
4557 struct fn_fieldlist
*fn_flp
4558 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
4559 physname
= (char *) dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
4560 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
4564 /* Generate full symbol information for PST and CU, whose DIEs have
4565 already been loaded into memory. */
4568 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4570 struct dwarf2_cu
*cu
= per_cu
->cu
;
4571 struct objfile
*objfile
= per_cu
->objfile
;
4572 CORE_ADDR lowpc
, highpc
;
4573 struct symtab
*symtab
;
4574 struct cleanup
*back_to
, *delayed_list_cleanup
;
4577 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4580 back_to
= make_cleanup (really_free_pendings
, NULL
);
4581 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
4583 cu
->list_in_scope
= &file_symbols
;
4585 dwarf2_find_base_address (cu
->dies
, cu
);
4587 /* Do line number decoding in read_file_scope () */
4588 process_die (cu
->dies
, cu
);
4590 /* Now that we have processed all the DIEs in the CU, all the types
4591 should be complete, and it should now be safe to compute all of the
4593 compute_delayed_physnames (cu
);
4594 do_cleanups (delayed_list_cleanup
);
4596 /* Some compilers don't define a DW_AT_high_pc attribute for the
4597 compilation unit. If the DW_AT_high_pc is missing, synthesize
4598 it, by scanning the DIE's below the compilation unit. */
4599 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
4601 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
4603 /* Set symtab language to language from DW_AT_language.
4604 If the compilation is from a C file generated by language preprocessors,
4605 do not set the language if it was already deduced by start_subfile. */
4607 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
4609 symtab
->language
= cu
->language
;
4612 if (dwarf2_per_objfile
->using_index
)
4613 per_cu
->v
.quick
->symtab
= symtab
;
4616 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4617 pst
->symtab
= symtab
;
4621 do_cleanups (back_to
);
4624 /* Process a die and its children. */
4627 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
4631 case DW_TAG_padding
:
4633 case DW_TAG_compile_unit
:
4634 read_file_scope (die
, cu
);
4636 case DW_TAG_type_unit
:
4637 read_type_unit_scope (die
, cu
);
4639 case DW_TAG_subprogram
:
4640 case DW_TAG_inlined_subroutine
:
4641 read_func_scope (die
, cu
);
4643 case DW_TAG_lexical_block
:
4644 case DW_TAG_try_block
:
4645 case DW_TAG_catch_block
:
4646 read_lexical_block_scope (die
, cu
);
4648 case DW_TAG_class_type
:
4649 case DW_TAG_interface_type
:
4650 case DW_TAG_structure_type
:
4651 case DW_TAG_union_type
:
4652 process_structure_scope (die
, cu
);
4654 case DW_TAG_enumeration_type
:
4655 process_enumeration_scope (die
, cu
);
4658 /* These dies have a type, but processing them does not create
4659 a symbol or recurse to process the children. Therefore we can
4660 read them on-demand through read_type_die. */
4661 case DW_TAG_subroutine_type
:
4662 case DW_TAG_set_type
:
4663 case DW_TAG_array_type
:
4664 case DW_TAG_pointer_type
:
4665 case DW_TAG_ptr_to_member_type
:
4666 case DW_TAG_reference_type
:
4667 case DW_TAG_string_type
:
4670 case DW_TAG_base_type
:
4671 case DW_TAG_subrange_type
:
4672 case DW_TAG_typedef
:
4673 /* Add a typedef symbol for the type definition, if it has a
4675 new_symbol (die
, read_type_die (die
, cu
), cu
);
4677 case DW_TAG_common_block
:
4678 read_common_block (die
, cu
);
4680 case DW_TAG_common_inclusion
:
4682 case DW_TAG_namespace
:
4683 processing_has_namespace_info
= 1;
4684 read_namespace (die
, cu
);
4687 processing_has_namespace_info
= 1;
4688 read_module (die
, cu
);
4690 case DW_TAG_imported_declaration
:
4691 case DW_TAG_imported_module
:
4692 processing_has_namespace_info
= 1;
4693 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
4694 || cu
->language
!= language_fortran
))
4695 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
4696 dwarf_tag_name (die
->tag
));
4697 read_import_statement (die
, cu
);
4700 new_symbol (die
, NULL
, cu
);
4705 /* A helper function for dwarf2_compute_name which determines whether DIE
4706 needs to have the name of the scope prepended to the name listed in the
4710 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4712 struct attribute
*attr
;
4716 case DW_TAG_namespace
:
4717 case DW_TAG_typedef
:
4718 case DW_TAG_class_type
:
4719 case DW_TAG_interface_type
:
4720 case DW_TAG_structure_type
:
4721 case DW_TAG_union_type
:
4722 case DW_TAG_enumeration_type
:
4723 case DW_TAG_enumerator
:
4724 case DW_TAG_subprogram
:
4728 case DW_TAG_variable
:
4729 case DW_TAG_constant
:
4730 /* We only need to prefix "globally" visible variables. These include
4731 any variable marked with DW_AT_external or any variable that
4732 lives in a namespace. [Variables in anonymous namespaces
4733 require prefixing, but they are not DW_AT_external.] */
4735 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
4737 struct dwarf2_cu
*spec_cu
= cu
;
4739 return die_needs_namespace (die_specification (die
, &spec_cu
),
4743 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
4744 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
4745 && die
->parent
->tag
!= DW_TAG_module
)
4747 /* A variable in a lexical block of some kind does not need a
4748 namespace, even though in C++ such variables may be external
4749 and have a mangled name. */
4750 if (die
->parent
->tag
== DW_TAG_lexical_block
4751 || die
->parent
->tag
== DW_TAG_try_block
4752 || die
->parent
->tag
== DW_TAG_catch_block
4753 || die
->parent
->tag
== DW_TAG_subprogram
)
4762 /* Retrieve the last character from a mem_file. */
4765 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
4767 char *last_char_p
= (char *) object
;
4770 *last_char_p
= buffer
[length
- 1];
4773 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4774 compute the physname for the object, which include a method's
4775 formal parameters (C++/Java) and return type (Java).
4777 For Ada, return the DIE's linkage name rather than the fully qualified
4778 name. PHYSNAME is ignored..
4780 The result is allocated on the objfile_obstack and canonicalized. */
4783 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
4787 name
= dwarf2_name (die
, cu
);
4789 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4790 compute it by typename_concat inside GDB. */
4791 if (cu
->language
== language_ada
4792 || (cu
->language
== language_fortran
&& physname
))
4794 /* For Ada unit, we prefer the linkage name over the name, as
4795 the former contains the exported name, which the user expects
4796 to be able to reference. Ideally, we want the user to be able
4797 to reference this entity using either natural or linkage name,
4798 but we haven't started looking at this enhancement yet. */
4799 struct attribute
*attr
;
4801 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
4803 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
4804 if (attr
&& DW_STRING (attr
))
4805 return DW_STRING (attr
);
4808 /* These are the only languages we know how to qualify names in. */
4810 && (cu
->language
== language_cplus
|| cu
->language
== language_java
4811 || cu
->language
== language_fortran
))
4813 if (die_needs_namespace (die
, cu
))
4817 struct ui_file
*buf
;
4819 prefix
= determine_prefix (die
, cu
);
4820 buf
= mem_fileopen ();
4821 if (*prefix
!= '\0')
4823 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
4826 fputs_unfiltered (prefixed_name
, buf
);
4827 xfree (prefixed_name
);
4830 fputs_unfiltered (name
? name
: "", buf
);
4832 /* Template parameters may be specified in the DIE's DW_AT_name, or
4833 as children with DW_TAG_template_type_param or
4834 DW_TAG_value_type_param. If the latter, add them to the name
4835 here. If the name already has template parameters, then
4836 skip this step; some versions of GCC emit both, and
4837 it is more efficient to use the pre-computed name.
4839 Something to keep in mind about this process: it is very
4840 unlikely, or in some cases downright impossible, to produce
4841 something that will match the mangled name of a function.
4842 If the definition of the function has the same debug info,
4843 we should be able to match up with it anyway. But fallbacks
4844 using the minimal symbol, for instance to find a method
4845 implemented in a stripped copy of libstdc++, will not work.
4846 If we do not have debug info for the definition, we will have to
4847 match them up some other way.
4849 When we do name matching there is a related problem with function
4850 templates; two instantiated function templates are allowed to
4851 differ only by their return types, which we do not add here. */
4853 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
4855 struct attribute
*attr
;
4856 struct die_info
*child
;
4859 die
->building_fullname
= 1;
4861 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
4866 struct dwarf2_locexpr_baton
*baton
;
4869 if (child
->tag
!= DW_TAG_template_type_param
4870 && child
->tag
!= DW_TAG_template_value_param
)
4875 fputs_unfiltered ("<", buf
);
4879 fputs_unfiltered (", ", buf
);
4881 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
4884 complaint (&symfile_complaints
,
4885 _("template parameter missing DW_AT_type"));
4886 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
4889 type
= die_type (child
, cu
);
4891 if (child
->tag
== DW_TAG_template_type_param
)
4893 c_print_type (type
, "", buf
, -1, 0);
4897 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
4900 complaint (&symfile_complaints
,
4901 _("template parameter missing "
4902 "DW_AT_const_value"));
4903 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
4907 dwarf2_const_value_attr (attr
, type
, name
,
4908 &cu
->comp_unit_obstack
, cu
,
4909 &value
, &bytes
, &baton
);
4911 if (TYPE_NOSIGN (type
))
4912 /* GDB prints characters as NUMBER 'CHAR'. If that's
4913 changed, this can use value_print instead. */
4914 c_printchar (value
, type
, buf
);
4917 struct value_print_options opts
;
4920 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
4924 else if (bytes
!= NULL
)
4926 v
= allocate_value (type
);
4927 memcpy (value_contents_writeable (v
), bytes
,
4928 TYPE_LENGTH (type
));
4931 v
= value_from_longest (type
, value
);
4933 /* Specify decimal so that we do not depend on
4935 get_formatted_print_options (&opts
, 'd');
4937 value_print (v
, buf
, &opts
);
4943 die
->building_fullname
= 0;
4947 /* Close the argument list, with a space if necessary
4948 (nested templates). */
4949 char last_char
= '\0';
4950 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
4951 if (last_char
== '>')
4952 fputs_unfiltered (" >", buf
);
4954 fputs_unfiltered (">", buf
);
4958 /* For Java and C++ methods, append formal parameter type
4959 information, if PHYSNAME. */
4961 if (physname
&& die
->tag
== DW_TAG_subprogram
4962 && (cu
->language
== language_cplus
4963 || cu
->language
== language_java
))
4965 struct type
*type
= read_type_die (die
, cu
);
4967 c_type_print_args (type
, buf
, 0, cu
->language
);
4969 if (cu
->language
== language_java
)
4971 /* For java, we must append the return type to method
4973 if (die
->tag
== DW_TAG_subprogram
)
4974 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
4977 else if (cu
->language
== language_cplus
)
4979 /* Assume that an artificial first parameter is
4980 "this", but do not crash if it is not. RealView
4981 marks unnamed (and thus unused) parameters as
4982 artificial; there is no way to differentiate
4984 if (TYPE_NFIELDS (type
) > 0
4985 && TYPE_FIELD_ARTIFICIAL (type
, 0)
4986 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
4987 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
4989 fputs_unfiltered (" const", buf
);
4993 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
4995 ui_file_delete (buf
);
4997 if (cu
->language
== language_cplus
)
5000 = dwarf2_canonicalize_name (name
, cu
,
5001 &cu
->objfile
->objfile_obstack
);
5012 /* Return the fully qualified name of DIE, based on its DW_AT_name.
5013 If scope qualifiers are appropriate they will be added. The result
5014 will be allocated on the objfile_obstack, or NULL if the DIE does
5015 not have a name. NAME may either be from a previous call to
5016 dwarf2_name or NULL.
5018 The output string will be canonicalized (if C++/Java). */
5021 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
5023 return dwarf2_compute_name (name
, die
, cu
, 0);
5026 /* Construct a physname for the given DIE in CU. NAME may either be
5027 from a previous call to dwarf2_name or NULL. The result will be
5028 allocated on the objfile_objstack or NULL if the DIE does not have a
5031 The output string will be canonicalized (if C++/Java). */
5034 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
5036 return dwarf2_compute_name (name
, die
, cu
, 1);
5039 /* Read the import statement specified by the given die and record it. */
5042 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
5044 struct attribute
*import_attr
;
5045 struct die_info
*imported_die
;
5046 struct dwarf2_cu
*imported_cu
;
5047 const char *imported_name
;
5048 const char *imported_name_prefix
;
5049 const char *canonical_name
;
5050 const char *import_alias
;
5051 const char *imported_declaration
= NULL
;
5052 const char *import_prefix
;
5056 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
5057 if (import_attr
== NULL
)
5059 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
5060 dwarf_tag_name (die
->tag
));
5065 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
5066 imported_name
= dwarf2_name (imported_die
, imported_cu
);
5067 if (imported_name
== NULL
)
5069 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
5071 The import in the following code:
5085 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
5086 <52> DW_AT_decl_file : 1
5087 <53> DW_AT_decl_line : 6
5088 <54> DW_AT_import : <0x75>
5089 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
5091 <5b> DW_AT_decl_file : 1
5092 <5c> DW_AT_decl_line : 2
5093 <5d> DW_AT_type : <0x6e>
5095 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
5096 <76> DW_AT_byte_size : 4
5097 <77> DW_AT_encoding : 5 (signed)
5099 imports the wrong die ( 0x75 instead of 0x58 ).
5100 This case will be ignored until the gcc bug is fixed. */
5104 /* Figure out the local name after import. */
5105 import_alias
= dwarf2_name (die
, cu
);
5107 /* Figure out where the statement is being imported to. */
5108 import_prefix
= determine_prefix (die
, cu
);
5110 /* Figure out what the scope of the imported die is and prepend it
5111 to the name of the imported die. */
5112 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
5114 if (imported_die
->tag
!= DW_TAG_namespace
5115 && imported_die
->tag
!= DW_TAG_module
)
5117 imported_declaration
= imported_name
;
5118 canonical_name
= imported_name_prefix
;
5120 else if (strlen (imported_name_prefix
) > 0)
5122 temp
= alloca (strlen (imported_name_prefix
)
5123 + 2 + strlen (imported_name
) + 1);
5124 strcpy (temp
, imported_name_prefix
);
5125 strcat (temp
, "::");
5126 strcat (temp
, imported_name
);
5127 canonical_name
= temp
;
5130 canonical_name
= imported_name
;
5132 cp_add_using_directive (import_prefix
,
5135 imported_declaration
,
5136 &cu
->objfile
->objfile_obstack
);
5140 initialize_cu_func_list (struct dwarf2_cu
*cu
)
5142 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
5145 /* Cleanup function for read_file_scope. */
5148 free_cu_line_header (void *arg
)
5150 struct dwarf2_cu
*cu
= arg
;
5152 free_line_header (cu
->line_header
);
5153 cu
->line_header
= NULL
;
5157 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
5158 char **name
, char **comp_dir
)
5160 struct attribute
*attr
;
5165 /* Find the filename. Do not use dwarf2_name here, since the filename
5166 is not a source language identifier. */
5167 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5170 *name
= DW_STRING (attr
);
5173 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5175 *comp_dir
= DW_STRING (attr
);
5176 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
5178 *comp_dir
= ldirname (*name
);
5179 if (*comp_dir
!= NULL
)
5180 make_cleanup (xfree
, *comp_dir
);
5182 if (*comp_dir
!= NULL
)
5184 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5185 directory, get rid of it. */
5186 char *cp
= strchr (*comp_dir
, ':');
5188 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
5193 *name
= "<unknown>";
5196 /* Process DW_TAG_compile_unit. */
5199 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5201 struct objfile
*objfile
= cu
->objfile
;
5202 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5203 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
5204 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
5205 struct attribute
*attr
;
5207 char *comp_dir
= NULL
;
5208 struct die_info
*child_die
;
5209 bfd
*abfd
= objfile
->obfd
;
5210 struct line_header
*line_header
= 0;
5213 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5215 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
5217 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5218 from finish_block. */
5219 if (lowpc
== ((CORE_ADDR
) -1))
5224 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
5226 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5229 set_cu_language (DW_UNSND (attr
), cu
);
5232 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5234 cu
->producer
= DW_STRING (attr
);
5236 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
5237 standardised yet. As a workaround for the language detection we fall
5238 back to the DW_AT_producer string. */
5239 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
5240 cu
->language
= language_opencl
;
5242 /* We assume that we're processing GCC output. */
5243 processing_gcc_compilation
= 2;
5245 processing_has_namespace_info
= 0;
5247 start_symtab (name
, comp_dir
, lowpc
);
5248 record_debugformat ("DWARF 2");
5249 record_producer (cu
->producer
);
5251 initialize_cu_func_list (cu
);
5253 /* Decode line number information if present. We do this before
5254 processing child DIEs, so that the line header table is available
5255 for DW_AT_decl_file. */
5256 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5259 unsigned int line_offset
= DW_UNSND (attr
);
5260 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
5263 cu
->line_header
= line_header
;
5264 make_cleanup (free_cu_line_header
, cu
);
5265 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
5269 /* Process all dies in compilation unit. */
5270 if (die
->child
!= NULL
)
5272 child_die
= die
->child
;
5273 while (child_die
&& child_die
->tag
)
5275 process_die (child_die
, cu
);
5276 child_die
= sibling_die (child_die
);
5280 /* Decode macro information, if present. Dwarf 2 macro information
5281 refers to information in the line number info statement program
5282 header, so we can only read it if we've read the header
5284 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
5285 if (attr
&& line_header
)
5287 unsigned int macro_offset
= DW_UNSND (attr
);
5289 dwarf_decode_macros (line_header
, macro_offset
,
5290 comp_dir
, abfd
, cu
);
5292 do_cleanups (back_to
);
5295 /* Process DW_TAG_type_unit.
5296 For TUs we want to skip the first top level sibling if it's not the
5297 actual type being defined by this TU. In this case the first top
5298 level sibling is there to provide context only. */
5301 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5303 struct objfile
*objfile
= cu
->objfile
;
5304 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5306 struct attribute
*attr
;
5308 char *comp_dir
= NULL
;
5309 struct die_info
*child_die
;
5310 bfd
*abfd
= objfile
->obfd
;
5312 /* start_symtab needs a low pc, but we don't really have one.
5313 Do what read_file_scope would do in the absence of such info. */
5314 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5316 /* Find the filename. Do not use dwarf2_name here, since the filename
5317 is not a source language identifier. */
5318 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5320 name
= DW_STRING (attr
);
5322 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5324 comp_dir
= DW_STRING (attr
);
5325 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
5327 comp_dir
= ldirname (name
);
5328 if (comp_dir
!= NULL
)
5329 make_cleanup (xfree
, comp_dir
);
5335 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5337 set_cu_language (DW_UNSND (attr
), cu
);
5339 /* This isn't technically needed today. It is done for symmetry
5340 with read_file_scope. */
5341 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5343 cu
->producer
= DW_STRING (attr
);
5345 /* We assume that we're processing GCC output. */
5346 processing_gcc_compilation
= 2;
5348 processing_has_namespace_info
= 0;
5350 start_symtab (name
, comp_dir
, lowpc
);
5351 record_debugformat ("DWARF 2");
5352 record_producer (cu
->producer
);
5354 /* Process the dies in the type unit. */
5355 if (die
->child
== NULL
)
5357 dump_die_for_error (die
);
5358 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5359 bfd_get_filename (abfd
));
5362 child_die
= die
->child
;
5364 while (child_die
&& child_die
->tag
)
5366 process_die (child_die
, cu
);
5368 child_die
= sibling_die (child_die
);
5371 do_cleanups (back_to
);
5375 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
5376 struct dwarf2_cu
*cu
)
5378 struct function_range
*thisfn
;
5380 thisfn
= (struct function_range
*)
5381 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
5382 thisfn
->name
= name
;
5383 thisfn
->lowpc
= lowpc
;
5384 thisfn
->highpc
= highpc
;
5385 thisfn
->seen_line
= 0;
5386 thisfn
->next
= NULL
;
5388 if (cu
->last_fn
== NULL
)
5389 cu
->first_fn
= thisfn
;
5391 cu
->last_fn
->next
= thisfn
;
5393 cu
->last_fn
= thisfn
;
5396 /* qsort helper for inherit_abstract_dies. */
5399 unsigned_int_compar (const void *ap
, const void *bp
)
5401 unsigned int a
= *(unsigned int *) ap
;
5402 unsigned int b
= *(unsigned int *) bp
;
5404 return (a
> b
) - (b
> a
);
5407 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5408 Inherit only the children of the DW_AT_abstract_origin DIE not being
5409 already referenced by DW_AT_abstract_origin from the children of the
5413 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
5415 struct die_info
*child_die
;
5416 unsigned die_children_count
;
5417 /* CU offsets which were referenced by children of the current DIE. */
5419 unsigned *offsets_end
, *offsetp
;
5420 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5421 struct die_info
*origin_die
;
5422 /* Iterator of the ORIGIN_DIE children. */
5423 struct die_info
*origin_child_die
;
5424 struct cleanup
*cleanups
;
5425 struct attribute
*attr
;
5426 struct dwarf2_cu
*origin_cu
;
5427 struct pending
**origin_previous_list_in_scope
;
5429 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
5433 /* Note that following die references may follow to a die in a
5437 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
5439 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5441 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
5442 origin_cu
->list_in_scope
= cu
->list_in_scope
;
5444 if (die
->tag
!= origin_die
->tag
5445 && !(die
->tag
== DW_TAG_inlined_subroutine
5446 && origin_die
->tag
== DW_TAG_subprogram
))
5447 complaint (&symfile_complaints
,
5448 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5449 die
->offset
, origin_die
->offset
);
5451 child_die
= die
->child
;
5452 die_children_count
= 0;
5453 while (child_die
&& child_die
->tag
)
5455 child_die
= sibling_die (child_die
);
5456 die_children_count
++;
5458 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
5459 cleanups
= make_cleanup (xfree
, offsets
);
5461 offsets_end
= offsets
;
5462 child_die
= die
->child
;
5463 while (child_die
&& child_die
->tag
)
5465 /* For each CHILD_DIE, find the corresponding child of
5466 ORIGIN_DIE. If there is more than one layer of
5467 DW_AT_abstract_origin, follow them all; there shouldn't be,
5468 but GCC versions at least through 4.4 generate this (GCC PR
5470 struct die_info
*child_origin_die
= child_die
;
5471 struct dwarf2_cu
*child_origin_cu
= cu
;
5475 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
5479 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
5483 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5484 counterpart may exist. */
5485 if (child_origin_die
!= child_die
)
5487 if (child_die
->tag
!= child_origin_die
->tag
5488 && !(child_die
->tag
== DW_TAG_inlined_subroutine
5489 && child_origin_die
->tag
== DW_TAG_subprogram
))
5490 complaint (&symfile_complaints
,
5491 _("Child DIE 0x%x and its abstract origin 0x%x have "
5492 "different tags"), child_die
->offset
,
5493 child_origin_die
->offset
);
5494 if (child_origin_die
->parent
!= origin_die
)
5495 complaint (&symfile_complaints
,
5496 _("Child DIE 0x%x and its abstract origin 0x%x have "
5497 "different parents"), child_die
->offset
,
5498 child_origin_die
->offset
);
5500 *offsets_end
++ = child_origin_die
->offset
;
5502 child_die
= sibling_die (child_die
);
5504 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
5505 unsigned_int_compar
);
5506 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
5507 if (offsetp
[-1] == *offsetp
)
5508 complaint (&symfile_complaints
,
5509 _("Multiple children of DIE 0x%x refer "
5510 "to DIE 0x%x as their abstract origin"),
5511 die
->offset
, *offsetp
);
5514 origin_child_die
= origin_die
->child
;
5515 while (origin_child_die
&& origin_child_die
->tag
)
5517 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5518 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
5520 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
5522 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5523 process_die (origin_child_die
, origin_cu
);
5525 origin_child_die
= sibling_die (origin_child_die
);
5527 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
5529 do_cleanups (cleanups
);
5533 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5535 struct objfile
*objfile
= cu
->objfile
;
5536 struct context_stack
*new;
5539 struct die_info
*child_die
;
5540 struct attribute
*attr
, *call_line
, *call_file
;
5543 struct block
*block
;
5544 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
5545 VEC (symbolp
) *template_args
= NULL
;
5546 struct template_symbol
*templ_func
= NULL
;
5550 /* If we do not have call site information, we can't show the
5551 caller of this inlined function. That's too confusing, so
5552 only use the scope for local variables. */
5553 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
5554 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
5555 if (call_line
== NULL
|| call_file
== NULL
)
5557 read_lexical_block_scope (die
, cu
);
5562 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5564 name
= dwarf2_name (die
, cu
);
5566 /* Ignore functions with missing or empty names. These are actually
5567 illegal according to the DWARF standard. */
5570 complaint (&symfile_complaints
,
5571 _("missing name for subprogram DIE at %d"), die
->offset
);
5575 /* Ignore functions with missing or invalid low and high pc attributes. */
5576 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5578 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5579 if (!attr
|| !DW_UNSND (attr
))
5580 complaint (&symfile_complaints
,
5581 _("cannot get low and high bounds "
5582 "for subprogram DIE at %d"),
5590 /* Record the function range for dwarf_decode_lines. */
5591 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
5593 /* If we have any template arguments, then we must allocate a
5594 different sort of symbol. */
5595 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
5597 if (child_die
->tag
== DW_TAG_template_type_param
5598 || child_die
->tag
== DW_TAG_template_value_param
)
5600 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5601 struct template_symbol
);
5602 templ_func
->base
.is_cplus_template_function
= 1;
5607 new = push_context (0, lowpc
);
5608 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
5609 (struct symbol
*) templ_func
);
5611 /* If there is a location expression for DW_AT_frame_base, record
5613 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
5615 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5616 expression is being recorded directly in the function's symbol
5617 and not in a separate frame-base object. I guess this hack is
5618 to avoid adding some sort of frame-base adjunct/annex to the
5619 function's symbol :-(. The problem with doing this is that it
5620 results in a function symbol with a location expression that
5621 has nothing to do with the location of the function, ouch! The
5622 relationship should be: a function's symbol has-a frame base; a
5623 frame-base has-a location expression. */
5624 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
5626 cu
->list_in_scope
= &local_symbols
;
5628 if (die
->child
!= NULL
)
5630 child_die
= die
->child
;
5631 while (child_die
&& child_die
->tag
)
5633 if (child_die
->tag
== DW_TAG_template_type_param
5634 || child_die
->tag
== DW_TAG_template_value_param
)
5636 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
5639 VEC_safe_push (symbolp
, template_args
, arg
);
5642 process_die (child_die
, cu
);
5643 child_die
= sibling_die (child_die
);
5647 inherit_abstract_dies (die
, cu
);
5649 /* If we have a DW_AT_specification, we might need to import using
5650 directives from the context of the specification DIE. See the
5651 comment in determine_prefix. */
5652 if (cu
->language
== language_cplus
5653 && dwarf2_attr (die
, DW_AT_specification
, cu
))
5655 struct dwarf2_cu
*spec_cu
= cu
;
5656 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
5660 child_die
= spec_die
->child
;
5661 while (child_die
&& child_die
->tag
)
5663 if (child_die
->tag
== DW_TAG_imported_module
)
5664 process_die (child_die
, spec_cu
);
5665 child_die
= sibling_die (child_die
);
5668 /* In some cases, GCC generates specification DIEs that
5669 themselves contain DW_AT_specification attributes. */
5670 spec_die
= die_specification (spec_die
, &spec_cu
);
5674 new = pop_context ();
5675 /* Make a block for the local symbols within. */
5676 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
5677 lowpc
, highpc
, objfile
);
5679 /* For C++, set the block's scope. */
5680 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
5681 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
5682 determine_prefix (die
, cu
),
5683 processing_has_namespace_info
);
5685 /* If we have address ranges, record them. */
5686 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5688 /* Attach template arguments to function. */
5689 if (! VEC_empty (symbolp
, template_args
))
5691 gdb_assert (templ_func
!= NULL
);
5693 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
5694 templ_func
->template_arguments
5695 = obstack_alloc (&objfile
->objfile_obstack
,
5696 (templ_func
->n_template_arguments
5697 * sizeof (struct symbol
*)));
5698 memcpy (templ_func
->template_arguments
,
5699 VEC_address (symbolp
, template_args
),
5700 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
5701 VEC_free (symbolp
, template_args
);
5704 /* In C++, we can have functions nested inside functions (e.g., when
5705 a function declares a class that has methods). This means that
5706 when we finish processing a function scope, we may need to go
5707 back to building a containing block's symbol lists. */
5708 local_symbols
= new->locals
;
5709 param_symbols
= new->params
;
5710 using_directives
= new->using_directives
;
5712 /* If we've finished processing a top-level function, subsequent
5713 symbols go in the file symbol list. */
5714 if (outermost_context_p ())
5715 cu
->list_in_scope
= &file_symbols
;
5718 /* Process all the DIES contained within a lexical block scope. Start
5719 a new scope, process the dies, and then close the scope. */
5722 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5724 struct objfile
*objfile
= cu
->objfile
;
5725 struct context_stack
*new;
5726 CORE_ADDR lowpc
, highpc
;
5727 struct die_info
*child_die
;
5730 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5732 /* Ignore blocks with missing or invalid low and high pc attributes. */
5733 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5734 as multiple lexical blocks? Handling children in a sane way would
5735 be nasty. Might be easier to properly extend generic blocks to
5737 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5742 push_context (0, lowpc
);
5743 if (die
->child
!= NULL
)
5745 child_die
= die
->child
;
5746 while (child_die
&& child_die
->tag
)
5748 process_die (child_die
, cu
);
5749 child_die
= sibling_die (child_die
);
5752 new = pop_context ();
5754 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
5757 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
5760 /* Note that recording ranges after traversing children, as we
5761 do here, means that recording a parent's ranges entails
5762 walking across all its children's ranges as they appear in
5763 the address map, which is quadratic behavior.
5765 It would be nicer to record the parent's ranges before
5766 traversing its children, simply overriding whatever you find
5767 there. But since we don't even decide whether to create a
5768 block until after we've traversed its children, that's hard
5770 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5772 local_symbols
= new->locals
;
5773 using_directives
= new->using_directives
;
5776 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5777 Return 1 if the attributes are present and valid, otherwise, return 0.
5778 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5781 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
5782 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
5783 struct partial_symtab
*ranges_pst
)
5785 struct objfile
*objfile
= cu
->objfile
;
5786 struct comp_unit_head
*cu_header
= &cu
->header
;
5787 bfd
*obfd
= objfile
->obfd
;
5788 unsigned int addr_size
= cu_header
->addr_size
;
5789 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5790 /* Base address selection entry. */
5801 found_base
= cu
->base_known
;
5802 base
= cu
->base_address
;
5804 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
5805 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5807 complaint (&symfile_complaints
,
5808 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5812 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5814 /* Read in the largest possible address. */
5815 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
5816 if ((marker
& mask
) == mask
)
5818 /* If we found the largest possible address, then
5819 read the base address. */
5820 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5821 buffer
+= 2 * addr_size
;
5822 offset
+= 2 * addr_size
;
5828 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5832 CORE_ADDR range_beginning
, range_end
;
5834 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
5835 buffer
+= addr_size
;
5836 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
5837 buffer
+= addr_size
;
5838 offset
+= 2 * addr_size
;
5840 /* An end of list marker is a pair of zero addresses. */
5841 if (range_beginning
== 0 && range_end
== 0)
5842 /* Found the end of list entry. */
5845 /* Each base address selection entry is a pair of 2 values.
5846 The first is the largest possible address, the second is
5847 the base address. Check for a base address here. */
5848 if ((range_beginning
& mask
) == mask
)
5850 /* If we found the largest possible address, then
5851 read the base address. */
5852 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5859 /* We have no valid base address for the ranges
5861 complaint (&symfile_complaints
,
5862 _("Invalid .debug_ranges data (no base address)"));
5866 range_beginning
+= base
;
5869 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
5870 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5871 range_beginning
+ baseaddr
,
5872 range_end
- 1 + baseaddr
,
5875 /* FIXME: This is recording everything as a low-high
5876 segment of consecutive addresses. We should have a
5877 data structure for discontiguous block ranges
5881 low
= range_beginning
;
5887 if (range_beginning
< low
)
5888 low
= range_beginning
;
5889 if (range_end
> high
)
5895 /* If the first entry is an end-of-list marker, the range
5896 describes an empty scope, i.e. no instructions. */
5902 *high_return
= high
;
5906 /* Get low and high pc attributes from a die. Return 1 if the attributes
5907 are present and valid, otherwise, return 0. Return -1 if the range is
5908 discontinuous, i.e. derived from DW_AT_ranges information. */
5910 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
5911 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
5912 struct partial_symtab
*pst
)
5914 struct attribute
*attr
;
5919 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5922 high
= DW_ADDR (attr
);
5923 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5925 low
= DW_ADDR (attr
);
5927 /* Found high w/o low attribute. */
5930 /* Found consecutive range of addresses. */
5935 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5938 /* Value of the DW_AT_ranges attribute is the offset in the
5939 .debug_ranges section. */
5940 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
5942 /* Found discontinuous range of addresses. */
5950 /* When using the GNU linker, .gnu.linkonce. sections are used to
5951 eliminate duplicate copies of functions and vtables and such.
5952 The linker will arbitrarily choose one and discard the others.
5953 The AT_*_pc values for such functions refer to local labels in
5954 these sections. If the section from that file was discarded, the
5955 labels are not in the output, so the relocs get a value of 0.
5956 If this is a discarded function, mark the pc bounds as invalid,
5957 so that GDB will ignore it. */
5958 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
5966 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
5967 its low and high PC addresses. Do nothing if these addresses could not
5968 be determined. Otherwise, set LOWPC to the low address if it is smaller,
5969 and HIGHPC to the high address if greater than HIGHPC. */
5972 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
5973 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5974 struct dwarf2_cu
*cu
)
5976 CORE_ADDR low
, high
;
5977 struct die_info
*child
= die
->child
;
5979 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
5981 *lowpc
= min (*lowpc
, low
);
5982 *highpc
= max (*highpc
, high
);
5985 /* If the language does not allow nested subprograms (either inside
5986 subprograms or lexical blocks), we're done. */
5987 if (cu
->language
!= language_ada
)
5990 /* Check all the children of the given DIE. If it contains nested
5991 subprograms, then check their pc bounds. Likewise, we need to
5992 check lexical blocks as well, as they may also contain subprogram
5994 while (child
&& child
->tag
)
5996 if (child
->tag
== DW_TAG_subprogram
5997 || child
->tag
== DW_TAG_lexical_block
)
5998 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
5999 child
= sibling_die (child
);
6003 /* Get the low and high pc's represented by the scope DIE, and store
6004 them in *LOWPC and *HIGHPC. If the correct values can't be
6005 determined, set *LOWPC to -1 and *HIGHPC to 0. */
6008 get_scope_pc_bounds (struct die_info
*die
,
6009 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6010 struct dwarf2_cu
*cu
)
6012 CORE_ADDR best_low
= (CORE_ADDR
) -1;
6013 CORE_ADDR best_high
= (CORE_ADDR
) 0;
6014 CORE_ADDR current_low
, current_high
;
6016 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
6018 best_low
= current_low
;
6019 best_high
= current_high
;
6023 struct die_info
*child
= die
->child
;
6025 while (child
&& child
->tag
)
6027 switch (child
->tag
) {
6028 case DW_TAG_subprogram
:
6029 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
6031 case DW_TAG_namespace
:
6033 /* FIXME: carlton/2004-01-16: Should we do this for
6034 DW_TAG_class_type/DW_TAG_structure_type, too? I think
6035 that current GCC's always emit the DIEs corresponding
6036 to definitions of methods of classes as children of a
6037 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
6038 the DIEs giving the declarations, which could be
6039 anywhere). But I don't see any reason why the
6040 standards says that they have to be there. */
6041 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
6043 if (current_low
!= ((CORE_ADDR
) -1))
6045 best_low
= min (best_low
, current_low
);
6046 best_high
= max (best_high
, current_high
);
6054 child
= sibling_die (child
);
6059 *highpc
= best_high
;
6062 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
6065 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
6066 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
6068 struct attribute
*attr
;
6070 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
6073 CORE_ADDR high
= DW_ADDR (attr
);
6075 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6078 CORE_ADDR low
= DW_ADDR (attr
);
6080 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
6084 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
6087 bfd
*obfd
= cu
->objfile
->obfd
;
6089 /* The value of the DW_AT_ranges attribute is the offset of the
6090 address range list in the .debug_ranges section. */
6091 unsigned long offset
= DW_UNSND (attr
);
6092 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
6094 /* For some target architectures, but not others, the
6095 read_address function sign-extends the addresses it returns.
6096 To recognize base address selection entries, we need a
6098 unsigned int addr_size
= cu
->header
.addr_size
;
6099 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
6101 /* The base address, to which the next pair is relative. Note
6102 that this 'base' is a DWARF concept: most entries in a range
6103 list are relative, to reduce the number of relocs against the
6104 debugging information. This is separate from this function's
6105 'baseaddr' argument, which GDB uses to relocate debugging
6106 information from a shared library based on the address at
6107 which the library was loaded. */
6108 CORE_ADDR base
= cu
->base_address
;
6109 int base_known
= cu
->base_known
;
6111 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
6112 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
6114 complaint (&symfile_complaints
,
6115 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
6122 unsigned int bytes_read
;
6123 CORE_ADDR start
, end
;
6125 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6126 buffer
+= bytes_read
;
6127 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6128 buffer
+= bytes_read
;
6130 /* Did we find the end of the range list? */
6131 if (start
== 0 && end
== 0)
6134 /* Did we find a base address selection entry? */
6135 else if ((start
& base_select_mask
) == base_select_mask
)
6141 /* We found an ordinary address range. */
6146 complaint (&symfile_complaints
,
6147 _("Invalid .debug_ranges data "
6148 "(no base address)"));
6152 record_block_range (block
,
6153 baseaddr
+ base
+ start
,
6154 baseaddr
+ base
+ end
- 1);
6160 /* Add an aggregate field to the field list. */
6163 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
6164 struct dwarf2_cu
*cu
)
6166 struct objfile
*objfile
= cu
->objfile
;
6167 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6168 struct nextfield
*new_field
;
6169 struct attribute
*attr
;
6171 char *fieldname
= "";
6173 /* Allocate a new field list entry and link it in. */
6174 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
6175 make_cleanup (xfree
, new_field
);
6176 memset (new_field
, 0, sizeof (struct nextfield
));
6178 if (die
->tag
== DW_TAG_inheritance
)
6180 new_field
->next
= fip
->baseclasses
;
6181 fip
->baseclasses
= new_field
;
6185 new_field
->next
= fip
->fields
;
6186 fip
->fields
= new_field
;
6190 /* Handle accessibility and virtuality of field.
6191 The default accessibility for members is public, the default
6192 accessibility for inheritance is private. */
6193 if (die
->tag
!= DW_TAG_inheritance
)
6194 new_field
->accessibility
= DW_ACCESS_public
;
6196 new_field
->accessibility
= DW_ACCESS_private
;
6197 new_field
->virtuality
= DW_VIRTUALITY_none
;
6199 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6201 new_field
->accessibility
= DW_UNSND (attr
);
6202 if (new_field
->accessibility
!= DW_ACCESS_public
)
6203 fip
->non_public_fields
= 1;
6204 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6206 new_field
->virtuality
= DW_UNSND (attr
);
6208 fp
= &new_field
->field
;
6210 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
6212 /* Data member other than a C++ static data member. */
6214 /* Get type of field. */
6215 fp
->type
= die_type (die
, cu
);
6217 SET_FIELD_BITPOS (*fp
, 0);
6219 /* Get bit size of field (zero if none). */
6220 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
6223 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
6227 FIELD_BITSIZE (*fp
) = 0;
6230 /* Get bit offset of field. */
6231 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6234 int byte_offset
= 0;
6236 if (attr_form_is_section_offset (attr
))
6237 dwarf2_complex_location_expr_complaint ();
6238 else if (attr_form_is_constant (attr
))
6239 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6240 else if (attr_form_is_block (attr
))
6241 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6243 dwarf2_complex_location_expr_complaint ();
6245 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6247 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
6250 if (gdbarch_bits_big_endian (gdbarch
))
6252 /* For big endian bits, the DW_AT_bit_offset gives the
6253 additional bit offset from the MSB of the containing
6254 anonymous object to the MSB of the field. We don't
6255 have to do anything special since we don't need to
6256 know the size of the anonymous object. */
6257 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
6261 /* For little endian bits, compute the bit offset to the
6262 MSB of the anonymous object, subtract off the number of
6263 bits from the MSB of the field to the MSB of the
6264 object, and then subtract off the number of bits of
6265 the field itself. The result is the bit offset of
6266 the LSB of the field. */
6268 int bit_offset
= DW_UNSND (attr
);
6270 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6273 /* The size of the anonymous object containing
6274 the bit field is explicit, so use the
6275 indicated size (in bytes). */
6276 anonymous_size
= DW_UNSND (attr
);
6280 /* The size of the anonymous object containing
6281 the bit field must be inferred from the type
6282 attribute of the data member containing the
6284 anonymous_size
= TYPE_LENGTH (fp
->type
);
6286 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
6287 - bit_offset
- FIELD_BITSIZE (*fp
);
6291 /* Get name of field. */
6292 fieldname
= dwarf2_name (die
, cu
);
6293 if (fieldname
== NULL
)
6296 /* The name is already allocated along with this objfile, so we don't
6297 need to duplicate it for the type. */
6298 fp
->name
= fieldname
;
6300 /* Change accessibility for artificial fields (e.g. virtual table
6301 pointer or virtual base class pointer) to private. */
6302 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
6304 FIELD_ARTIFICIAL (*fp
) = 1;
6305 new_field
->accessibility
= DW_ACCESS_private
;
6306 fip
->non_public_fields
= 1;
6309 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
6311 /* C++ static member. */
6313 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
6314 is a declaration, but all versions of G++ as of this writing
6315 (so through at least 3.2.1) incorrectly generate
6316 DW_TAG_variable tags. */
6320 /* Get name of field. */
6321 fieldname
= dwarf2_name (die
, cu
);
6322 if (fieldname
== NULL
)
6325 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
6327 /* Only create a symbol if this is an external value.
6328 new_symbol checks this and puts the value in the global symbol
6329 table, which we want. If it is not external, new_symbol
6330 will try to put the value in cu->list_in_scope which is wrong. */
6331 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
6333 /* A static const member, not much different than an enum as far as
6334 we're concerned, except that we can support more types. */
6335 new_symbol (die
, NULL
, cu
);
6338 /* Get physical name. */
6339 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6341 /* The name is already allocated along with this objfile, so we don't
6342 need to duplicate it for the type. */
6343 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
6344 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6345 FIELD_NAME (*fp
) = fieldname
;
6347 else if (die
->tag
== DW_TAG_inheritance
)
6349 /* C++ base class field. */
6350 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6353 int byte_offset
= 0;
6355 if (attr_form_is_section_offset (attr
))
6356 dwarf2_complex_location_expr_complaint ();
6357 else if (attr_form_is_constant (attr
))
6358 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6359 else if (attr_form_is_block (attr
))
6360 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6362 dwarf2_complex_location_expr_complaint ();
6364 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6366 FIELD_BITSIZE (*fp
) = 0;
6367 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6368 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
6369 fip
->nbaseclasses
++;
6373 /* Add a typedef defined in the scope of the FIP's class. */
6376 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
6377 struct dwarf2_cu
*cu
)
6379 struct objfile
*objfile
= cu
->objfile
;
6380 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6381 struct typedef_field_list
*new_field
;
6382 struct attribute
*attr
;
6383 struct typedef_field
*fp
;
6384 char *fieldname
= "";
6386 /* Allocate a new field list entry and link it in. */
6387 new_field
= xzalloc (sizeof (*new_field
));
6388 make_cleanup (xfree
, new_field
);
6390 gdb_assert (die
->tag
== DW_TAG_typedef
);
6392 fp
= &new_field
->field
;
6394 /* Get name of field. */
6395 fp
->name
= dwarf2_name (die
, cu
);
6396 if (fp
->name
== NULL
)
6399 fp
->type
= read_type_die (die
, cu
);
6401 new_field
->next
= fip
->typedef_field_list
;
6402 fip
->typedef_field_list
= new_field
;
6403 fip
->typedef_field_list_count
++;
6406 /* Create the vector of fields, and attach it to the type. */
6409 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
6410 struct dwarf2_cu
*cu
)
6412 int nfields
= fip
->nfields
;
6414 /* Record the field count, allocate space for the array of fields,
6415 and create blank accessibility bitfields if necessary. */
6416 TYPE_NFIELDS (type
) = nfields
;
6417 TYPE_FIELDS (type
) = (struct field
*)
6418 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
6419 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
6421 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
6423 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6425 TYPE_FIELD_PRIVATE_BITS (type
) =
6426 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6427 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
6429 TYPE_FIELD_PROTECTED_BITS (type
) =
6430 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6431 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
6433 TYPE_FIELD_IGNORE_BITS (type
) =
6434 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6435 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
6438 /* If the type has baseclasses, allocate and clear a bit vector for
6439 TYPE_FIELD_VIRTUAL_BITS. */
6440 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
6442 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
6443 unsigned char *pointer
;
6445 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6446 pointer
= TYPE_ALLOC (type
, num_bytes
);
6447 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
6448 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
6449 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
6452 /* Copy the saved-up fields into the field vector. Start from the head of
6453 the list, adding to the tail of the field array, so that they end up in
6454 the same order in the array in which they were added to the list. */
6455 while (nfields
-- > 0)
6457 struct nextfield
*fieldp
;
6461 fieldp
= fip
->fields
;
6462 fip
->fields
= fieldp
->next
;
6466 fieldp
= fip
->baseclasses
;
6467 fip
->baseclasses
= fieldp
->next
;
6470 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
6471 switch (fieldp
->accessibility
)
6473 case DW_ACCESS_private
:
6474 if (cu
->language
!= language_ada
)
6475 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
6478 case DW_ACCESS_protected
:
6479 if (cu
->language
!= language_ada
)
6480 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
6483 case DW_ACCESS_public
:
6487 /* Unknown accessibility. Complain and treat it as public. */
6489 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
6490 fieldp
->accessibility
);
6494 if (nfields
< fip
->nbaseclasses
)
6496 switch (fieldp
->virtuality
)
6498 case DW_VIRTUALITY_virtual
:
6499 case DW_VIRTUALITY_pure_virtual
:
6500 if (cu
->language
== language_ada
)
6501 error (_("unexpected virtuality in component of Ada type"));
6502 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
6509 /* Add a member function to the proper fieldlist. */
6512 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
6513 struct type
*type
, struct dwarf2_cu
*cu
)
6515 struct objfile
*objfile
= cu
->objfile
;
6516 struct attribute
*attr
;
6517 struct fnfieldlist
*flp
;
6519 struct fn_field
*fnp
;
6521 struct nextfnfield
*new_fnfield
;
6522 struct type
*this_type
;
6524 if (cu
->language
== language_ada
)
6525 error (_("unexpected member function in Ada type"));
6527 /* Get name of member function. */
6528 fieldname
= dwarf2_name (die
, cu
);
6529 if (fieldname
== NULL
)
6532 /* Look up member function name in fieldlist. */
6533 for (i
= 0; i
< fip
->nfnfields
; i
++)
6535 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
6539 /* Create new list element if necessary. */
6540 if (i
< fip
->nfnfields
)
6541 flp
= &fip
->fnfieldlists
[i
];
6544 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
6546 fip
->fnfieldlists
= (struct fnfieldlist
*)
6547 xrealloc (fip
->fnfieldlists
,
6548 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
6549 * sizeof (struct fnfieldlist
));
6550 if (fip
->nfnfields
== 0)
6551 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
6553 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
6554 flp
->name
= fieldname
;
6557 i
= fip
->nfnfields
++;
6560 /* Create a new member function field and chain it to the field list
6562 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
6563 make_cleanup (xfree
, new_fnfield
);
6564 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
6565 new_fnfield
->next
= flp
->head
;
6566 flp
->head
= new_fnfield
;
6569 /* Fill in the member function field info. */
6570 fnp
= &new_fnfield
->fnfield
;
6572 /* Delay processing of the physname until later. */
6573 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
6575 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
6580 char *physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6581 fnp
->physname
= physname
? physname
: "";
6584 fnp
->type
= alloc_type (objfile
);
6585 this_type
= read_type_die (die
, cu
);
6586 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
6588 int nparams
= TYPE_NFIELDS (this_type
);
6590 /* TYPE is the domain of this method, and THIS_TYPE is the type
6591 of the method itself (TYPE_CODE_METHOD). */
6592 smash_to_method_type (fnp
->type
, type
,
6593 TYPE_TARGET_TYPE (this_type
),
6594 TYPE_FIELDS (this_type
),
6595 TYPE_NFIELDS (this_type
),
6596 TYPE_VARARGS (this_type
));
6598 /* Handle static member functions.
6599 Dwarf2 has no clean way to discern C++ static and non-static
6600 member functions. G++ helps GDB by marking the first
6601 parameter for non-static member functions (which is the this
6602 pointer) as artificial. We obtain this information from
6603 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
6604 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
6605 fnp
->voffset
= VOFFSET_STATIC
;
6608 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
6609 dwarf2_full_name (fieldname
, die
, cu
));
6611 /* Get fcontext from DW_AT_containing_type if present. */
6612 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6613 fnp
->fcontext
= die_containing_type (die
, cu
);
6615 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
6616 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
6618 /* Get accessibility. */
6619 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6622 switch (DW_UNSND (attr
))
6624 case DW_ACCESS_private
:
6625 fnp
->is_private
= 1;
6627 case DW_ACCESS_protected
:
6628 fnp
->is_protected
= 1;
6633 /* Check for artificial methods. */
6634 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
6635 if (attr
&& DW_UNSND (attr
) != 0)
6636 fnp
->is_artificial
= 1;
6638 /* Get index in virtual function table if it is a virtual member
6639 function. For older versions of GCC, this is an offset in the
6640 appropriate virtual table, as specified by DW_AT_containing_type.
6641 For everyone else, it is an expression to be evaluated relative
6642 to the object address. */
6644 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
6647 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
6649 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
6651 /* Old-style GCC. */
6652 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
6654 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6655 || (DW_BLOCK (attr
)->size
> 1
6656 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
6657 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
6659 struct dwarf_block blk
;
6662 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6664 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
6665 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
6666 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6667 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
6668 dwarf2_complex_location_expr_complaint ();
6670 fnp
->voffset
/= cu
->header
.addr_size
;
6674 dwarf2_complex_location_expr_complaint ();
6677 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
6679 else if (attr_form_is_section_offset (attr
))
6681 dwarf2_complex_location_expr_complaint ();
6685 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
6691 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6692 if (attr
&& DW_UNSND (attr
))
6694 /* GCC does this, as of 2008-08-25; PR debug/37237. */
6695 complaint (&symfile_complaints
,
6696 _("Member function \"%s\" (offset %d) is virtual "
6697 "but the vtable offset is not specified"),
6698 fieldname
, die
->offset
);
6699 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6700 TYPE_CPLUS_DYNAMIC (type
) = 1;
6705 /* Create the vector of member function fields, and attach it to the type. */
6708 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
6709 struct dwarf2_cu
*cu
)
6711 struct fnfieldlist
*flp
;
6712 int total_length
= 0;
6715 if (cu
->language
== language_ada
)
6716 error (_("unexpected member functions in Ada type"));
6718 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6719 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
6720 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
6722 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
6724 struct nextfnfield
*nfp
= flp
->head
;
6725 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
6728 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
6729 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
6730 fn_flp
->fn_fields
= (struct fn_field
*)
6731 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
6732 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
6733 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
6735 total_length
+= flp
->length
;
6738 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
6739 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
6742 /* Returns non-zero if NAME is the name of a vtable member in CU's
6743 language, zero otherwise. */
6745 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
6747 static const char vptr
[] = "_vptr";
6748 static const char vtable
[] = "vtable";
6750 /* Look for the C++ and Java forms of the vtable. */
6751 if ((cu
->language
== language_java
6752 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
6753 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
6754 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
6760 /* GCC outputs unnamed structures that are really pointers to member
6761 functions, with the ABI-specified layout. If TYPE describes
6762 such a structure, smash it into a member function type.
6764 GCC shouldn't do this; it should just output pointer to member DIEs.
6765 This is GCC PR debug/28767. */
6768 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
6770 struct type
*pfn_type
, *domain_type
, *new_type
;
6772 /* Check for a structure with no name and two children. */
6773 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
6776 /* Check for __pfn and __delta members. */
6777 if (TYPE_FIELD_NAME (type
, 0) == NULL
6778 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
6779 || TYPE_FIELD_NAME (type
, 1) == NULL
6780 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
6783 /* Find the type of the method. */
6784 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
6785 if (pfn_type
== NULL
6786 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
6787 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
6790 /* Look for the "this" argument. */
6791 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
6792 if (TYPE_NFIELDS (pfn_type
) == 0
6793 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6794 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
6797 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
6798 new_type
= alloc_type (objfile
);
6799 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
6800 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
6801 TYPE_VARARGS (pfn_type
));
6802 smash_to_methodptr_type (type
, new_type
);
6805 /* Called when we find the DIE that starts a structure or union scope
6806 (definition) to create a type for the structure or union. Fill in
6807 the type's name and general properties; the members will not be
6808 processed until process_structure_type.
6810 NOTE: we need to call these functions regardless of whether or not the
6811 DIE has a DW_AT_name attribute, since it might be an anonymous
6812 structure or union. This gets the type entered into our set of
6815 However, if the structure is incomplete (an opaque struct/union)
6816 then suppress creating a symbol table entry for it since gdb only
6817 wants to find the one with the complete definition. Note that if
6818 it is complete, we just call new_symbol, which does it's own
6819 checking about whether the struct/union is anonymous or not (and
6820 suppresses creating a symbol table entry itself). */
6822 static struct type
*
6823 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6825 struct objfile
*objfile
= cu
->objfile
;
6827 struct attribute
*attr
;
6830 /* If the definition of this type lives in .debug_types, read that type.
6831 Don't follow DW_AT_specification though, that will take us back up
6832 the chain and we want to go down. */
6833 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
6836 struct dwarf2_cu
*type_cu
= cu
;
6837 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
6839 /* We could just recurse on read_structure_type, but we need to call
6840 get_die_type to ensure only one type for this DIE is created.
6841 This is important, for example, because for c++ classes we need
6842 TYPE_NAME set which is only done by new_symbol. Blech. */
6843 type
= read_type_die (type_die
, type_cu
);
6845 /* TYPE_CU may not be the same as CU.
6846 Ensure TYPE is recorded in CU's type_hash table. */
6847 return set_die_type (die
, type
, cu
);
6850 type
= alloc_type (objfile
);
6851 INIT_CPLUS_SPECIFIC (type
);
6853 name
= dwarf2_name (die
, cu
);
6856 if (cu
->language
== language_cplus
6857 || cu
->language
== language_java
)
6859 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
6861 /* dwarf2_full_name might have already finished building the DIE's
6862 type. If so, there is no need to continue. */
6863 if (get_die_type (die
, cu
) != NULL
)
6864 return get_die_type (die
, cu
);
6866 TYPE_TAG_NAME (type
) = full_name
;
6867 if (die
->tag
== DW_TAG_structure_type
6868 || die
->tag
== DW_TAG_class_type
)
6869 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6873 /* The name is already allocated along with this objfile, so
6874 we don't need to duplicate it for the type. */
6875 TYPE_TAG_NAME (type
) = (char *) name
;
6876 if (die
->tag
== DW_TAG_class_type
)
6877 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6881 if (die
->tag
== DW_TAG_structure_type
)
6883 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
6885 else if (die
->tag
== DW_TAG_union_type
)
6887 TYPE_CODE (type
) = TYPE_CODE_UNION
;
6891 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
6894 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
6895 TYPE_DECLARED_CLASS (type
) = 1;
6897 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6900 TYPE_LENGTH (type
) = DW_UNSND (attr
);
6904 TYPE_LENGTH (type
) = 0;
6907 TYPE_STUB_SUPPORTED (type
) = 1;
6908 if (die_is_declaration (die
, cu
))
6909 TYPE_STUB (type
) = 1;
6910 else if (attr
== NULL
&& die
->child
== NULL
6911 && producer_is_realview (cu
->producer
))
6912 /* RealView does not output the required DW_AT_declaration
6913 on incomplete types. */
6914 TYPE_STUB (type
) = 1;
6916 /* We need to add the type field to the die immediately so we don't
6917 infinitely recurse when dealing with pointers to the structure
6918 type within the structure itself. */
6919 set_die_type (die
, type
, cu
);
6921 /* set_die_type should be already done. */
6922 set_descriptive_type (type
, die
, cu
);
6927 /* Finish creating a structure or union type, including filling in
6928 its members and creating a symbol for it. */
6931 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6933 struct objfile
*objfile
= cu
->objfile
;
6934 struct die_info
*child_die
= die
->child
;
6937 type
= get_die_type (die
, cu
);
6939 type
= read_structure_type (die
, cu
);
6941 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
6943 struct field_info fi
;
6944 struct die_info
*child_die
;
6945 VEC (symbolp
) *template_args
= NULL
;
6946 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
6948 memset (&fi
, 0, sizeof (struct field_info
));
6950 child_die
= die
->child
;
6952 while (child_die
&& child_die
->tag
)
6954 if (child_die
->tag
== DW_TAG_member
6955 || child_die
->tag
== DW_TAG_variable
)
6957 /* NOTE: carlton/2002-11-05: A C++ static data member
6958 should be a DW_TAG_member that is a declaration, but
6959 all versions of G++ as of this writing (so through at
6960 least 3.2.1) incorrectly generate DW_TAG_variable
6961 tags for them instead. */
6962 dwarf2_add_field (&fi
, child_die
, cu
);
6964 else if (child_die
->tag
== DW_TAG_subprogram
)
6966 /* C++ member function. */
6967 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
6969 else if (child_die
->tag
== DW_TAG_inheritance
)
6971 /* C++ base class field. */
6972 dwarf2_add_field (&fi
, child_die
, cu
);
6974 else if (child_die
->tag
== DW_TAG_typedef
)
6975 dwarf2_add_typedef (&fi
, child_die
, cu
);
6976 else if (child_die
->tag
== DW_TAG_template_type_param
6977 || child_die
->tag
== DW_TAG_template_value_param
)
6979 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
6982 VEC_safe_push (symbolp
, template_args
, arg
);
6985 child_die
= sibling_die (child_die
);
6988 /* Attach template arguments to type. */
6989 if (! VEC_empty (symbolp
, template_args
))
6991 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6992 TYPE_N_TEMPLATE_ARGUMENTS (type
)
6993 = VEC_length (symbolp
, template_args
);
6994 TYPE_TEMPLATE_ARGUMENTS (type
)
6995 = obstack_alloc (&objfile
->objfile_obstack
,
6996 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
6997 * sizeof (struct symbol
*)));
6998 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
6999 VEC_address (symbolp
, template_args
),
7000 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
7001 * sizeof (struct symbol
*)));
7002 VEC_free (symbolp
, template_args
);
7005 /* Attach fields and member functions to the type. */
7007 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
7010 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
7012 /* Get the type which refers to the base class (possibly this
7013 class itself) which contains the vtable pointer for the current
7014 class from the DW_AT_containing_type attribute. This use of
7015 DW_AT_containing_type is a GNU extension. */
7017 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
7019 struct type
*t
= die_containing_type (die
, cu
);
7021 TYPE_VPTR_BASETYPE (type
) = t
;
7026 /* Our own class provides vtbl ptr. */
7027 for (i
= TYPE_NFIELDS (t
) - 1;
7028 i
>= TYPE_N_BASECLASSES (t
);
7031 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
7033 if (is_vtable_name (fieldname
, cu
))
7035 TYPE_VPTR_FIELDNO (type
) = i
;
7040 /* Complain if virtual function table field not found. */
7041 if (i
< TYPE_N_BASECLASSES (t
))
7042 complaint (&symfile_complaints
,
7043 _("virtual function table pointer "
7044 "not found when defining class '%s'"),
7045 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
7050 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
7053 else if (cu
->producer
7054 && strncmp (cu
->producer
,
7055 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
7057 /* The IBM XLC compiler does not provide direct indication
7058 of the containing type, but the vtable pointer is
7059 always named __vfp. */
7063 for (i
= TYPE_NFIELDS (type
) - 1;
7064 i
>= TYPE_N_BASECLASSES (type
);
7067 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
7069 TYPE_VPTR_FIELDNO (type
) = i
;
7070 TYPE_VPTR_BASETYPE (type
) = type
;
7077 /* Copy fi.typedef_field_list linked list elements content into the
7078 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
7079 if (fi
.typedef_field_list
)
7081 int i
= fi
.typedef_field_list_count
;
7083 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7084 TYPE_TYPEDEF_FIELD_ARRAY (type
)
7085 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
7086 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
7088 /* Reverse the list order to keep the debug info elements order. */
7091 struct typedef_field
*dest
, *src
;
7093 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
7094 src
= &fi
.typedef_field_list
->field
;
7095 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
7100 do_cleanups (back_to
);
7103 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
7105 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
7106 snapshots) has been known to create a die giving a declaration
7107 for a class that has, as a child, a die giving a definition for a
7108 nested class. So we have to process our children even if the
7109 current die is a declaration. Normally, of course, a declaration
7110 won't have any children at all. */
7112 while (child_die
!= NULL
&& child_die
->tag
)
7114 if (child_die
->tag
== DW_TAG_member
7115 || child_die
->tag
== DW_TAG_variable
7116 || child_die
->tag
== DW_TAG_inheritance
7117 || child_die
->tag
== DW_TAG_template_value_param
7118 || child_die
->tag
== DW_TAG_template_type_param
)
7123 process_die (child_die
, cu
);
7125 child_die
= sibling_die (child_die
);
7128 /* Do not consider external references. According to the DWARF standard,
7129 these DIEs are identified by the fact that they have no byte_size
7130 attribute, and a declaration attribute. */
7131 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
7132 || !die_is_declaration (die
, cu
))
7133 new_symbol (die
, type
, cu
);
7136 /* Given a DW_AT_enumeration_type die, set its type. We do not
7137 complete the type's fields yet, or create any symbols. */
7139 static struct type
*
7140 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7142 struct objfile
*objfile
= cu
->objfile
;
7144 struct attribute
*attr
;
7147 /* If the definition of this type lives in .debug_types, read that type.
7148 Don't follow DW_AT_specification though, that will take us back up
7149 the chain and we want to go down. */
7150 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
7153 struct dwarf2_cu
*type_cu
= cu
;
7154 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
7156 type
= read_type_die (type_die
, type_cu
);
7158 /* TYPE_CU may not be the same as CU.
7159 Ensure TYPE is recorded in CU's type_hash table. */
7160 return set_die_type (die
, type
, cu
);
7163 type
= alloc_type (objfile
);
7165 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
7166 name
= dwarf2_full_name (NULL
, die
, cu
);
7168 TYPE_TAG_NAME (type
) = (char *) name
;
7170 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7173 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7177 TYPE_LENGTH (type
) = 0;
7180 /* The enumeration DIE can be incomplete. In Ada, any type can be
7181 declared as private in the package spec, and then defined only
7182 inside the package body. Such types are known as Taft Amendment
7183 Types. When another package uses such a type, an incomplete DIE
7184 may be generated by the compiler. */
7185 if (die_is_declaration (die
, cu
))
7186 TYPE_STUB (type
) = 1;
7188 return set_die_type (die
, type
, cu
);
7191 /* Given a pointer to a die which begins an enumeration, process all
7192 the dies that define the members of the enumeration, and create the
7193 symbol for the enumeration type.
7195 NOTE: We reverse the order of the element list. */
7198 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7200 struct type
*this_type
;
7202 this_type
= get_die_type (die
, cu
);
7203 if (this_type
== NULL
)
7204 this_type
= read_enumeration_type (die
, cu
);
7206 if (die
->child
!= NULL
)
7208 struct die_info
*child_die
;
7210 struct field
*fields
= NULL
;
7212 int unsigned_enum
= 1;
7215 child_die
= die
->child
;
7216 while (child_die
&& child_die
->tag
)
7218 if (child_die
->tag
!= DW_TAG_enumerator
)
7220 process_die (child_die
, cu
);
7224 name
= dwarf2_name (child_die
, cu
);
7227 sym
= new_symbol (child_die
, this_type
, cu
);
7228 if (SYMBOL_VALUE (sym
) < 0)
7231 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7233 fields
= (struct field
*)
7235 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
7236 * sizeof (struct field
));
7239 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
7240 FIELD_TYPE (fields
[num_fields
]) = NULL
;
7241 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
7242 FIELD_BITSIZE (fields
[num_fields
]) = 0;
7248 child_die
= sibling_die (child_die
);
7253 TYPE_NFIELDS (this_type
) = num_fields
;
7254 TYPE_FIELDS (this_type
) = (struct field
*)
7255 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
7256 memcpy (TYPE_FIELDS (this_type
), fields
,
7257 sizeof (struct field
) * num_fields
);
7261 TYPE_UNSIGNED (this_type
) = 1;
7264 new_symbol (die
, this_type
, cu
);
7267 /* Extract all information from a DW_TAG_array_type DIE and put it in
7268 the DIE's type field. For now, this only handles one dimensional
7271 static struct type
*
7272 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7274 struct objfile
*objfile
= cu
->objfile
;
7275 struct die_info
*child_die
;
7277 struct type
*element_type
, *range_type
, *index_type
;
7278 struct type
**range_types
= NULL
;
7279 struct attribute
*attr
;
7281 struct cleanup
*back_to
;
7284 element_type
= die_type (die
, cu
);
7286 /* The die_type call above may have already set the type for this DIE. */
7287 type
= get_die_type (die
, cu
);
7291 /* Irix 6.2 native cc creates array types without children for
7292 arrays with unspecified length. */
7293 if (die
->child
== NULL
)
7295 index_type
= objfile_type (objfile
)->builtin_int
;
7296 range_type
= create_range_type (NULL
, index_type
, 0, -1);
7297 type
= create_array_type (NULL
, element_type
, range_type
);
7298 return set_die_type (die
, type
, cu
);
7301 back_to
= make_cleanup (null_cleanup
, NULL
);
7302 child_die
= die
->child
;
7303 while (child_die
&& child_die
->tag
)
7305 if (child_die
->tag
== DW_TAG_subrange_type
)
7307 struct type
*child_type
= read_type_die (child_die
, cu
);
7309 if (child_type
!= NULL
)
7311 /* The range type was succesfully read. Save it for the
7312 array type creation. */
7313 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
7315 range_types
= (struct type
**)
7316 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
7317 * sizeof (struct type
*));
7319 make_cleanup (free_current_contents
, &range_types
);
7321 range_types
[ndim
++] = child_type
;
7324 child_die
= sibling_die (child_die
);
7327 /* Dwarf2 dimensions are output from left to right, create the
7328 necessary array types in backwards order. */
7330 type
= element_type
;
7332 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
7337 type
= create_array_type (NULL
, type
, range_types
[i
++]);
7342 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
7345 /* Understand Dwarf2 support for vector types (like they occur on
7346 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
7347 array type. This is not part of the Dwarf2/3 standard yet, but a
7348 custom vendor extension. The main difference between a regular
7349 array and the vector variant is that vectors are passed by value
7351 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
7353 make_vector_type (type
);
7355 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
7356 implementation may choose to implement triple vectors using this
7358 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7361 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
7362 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7364 complaint (&symfile_complaints
,
7365 _("DW_AT_byte_size for array type smaller "
7366 "than the total size of elements"));
7369 name
= dwarf2_name (die
, cu
);
7371 TYPE_NAME (type
) = name
;
7373 /* Install the type in the die. */
7374 set_die_type (die
, type
, cu
);
7376 /* set_die_type should be already done. */
7377 set_descriptive_type (type
, die
, cu
);
7379 do_cleanups (back_to
);
7384 static enum dwarf_array_dim_ordering
7385 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
7387 struct attribute
*attr
;
7389 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
7391 if (attr
) return DW_SND (attr
);
7393 /* GNU F77 is a special case, as at 08/2004 array type info is the
7394 opposite order to the dwarf2 specification, but data is still
7395 laid out as per normal fortran.
7397 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
7398 version checking. */
7400 if (cu
->language
== language_fortran
7401 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
7403 return DW_ORD_row_major
;
7406 switch (cu
->language_defn
->la_array_ordering
)
7408 case array_column_major
:
7409 return DW_ORD_col_major
;
7410 case array_row_major
:
7412 return DW_ORD_row_major
;
7416 /* Extract all information from a DW_TAG_set_type DIE and put it in
7417 the DIE's type field. */
7419 static struct type
*
7420 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7422 struct type
*domain_type
, *set_type
;
7423 struct attribute
*attr
;
7425 domain_type
= die_type (die
, cu
);
7427 /* The die_type call above may have already set the type for this DIE. */
7428 set_type
= get_die_type (die
, cu
);
7432 set_type
= create_set_type (NULL
, domain_type
);
7434 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7436 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
7438 return set_die_type (die
, set_type
, cu
);
7441 /* First cut: install each common block member as a global variable. */
7444 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
7446 struct die_info
*child_die
;
7447 struct attribute
*attr
;
7449 CORE_ADDR base
= (CORE_ADDR
) 0;
7451 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7454 /* Support the .debug_loc offsets. */
7455 if (attr_form_is_block (attr
))
7457 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
7459 else if (attr_form_is_section_offset (attr
))
7461 dwarf2_complex_location_expr_complaint ();
7465 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7466 "common block member");
7469 if (die
->child
!= NULL
)
7471 child_die
= die
->child
;
7472 while (child_die
&& child_die
->tag
)
7474 sym
= new_symbol (child_die
, NULL
, cu
);
7475 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
7476 if (sym
!= NULL
&& attr
!= NULL
)
7478 CORE_ADDR byte_offset
= 0;
7480 if (attr_form_is_section_offset (attr
))
7481 dwarf2_complex_location_expr_complaint ();
7482 else if (attr_form_is_constant (attr
))
7483 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
7484 else if (attr_form_is_block (attr
))
7485 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
7487 dwarf2_complex_location_expr_complaint ();
7489 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
7490 add_symbol_to_list (sym
, &global_symbols
);
7492 child_die
= sibling_die (child_die
);
7497 /* Create a type for a C++ namespace. */
7499 static struct type
*
7500 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7502 struct objfile
*objfile
= cu
->objfile
;
7503 const char *previous_prefix
, *name
;
7507 /* For extensions, reuse the type of the original namespace. */
7508 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
7510 struct die_info
*ext_die
;
7511 struct dwarf2_cu
*ext_cu
= cu
;
7513 ext_die
= dwarf2_extension (die
, &ext_cu
);
7514 type
= read_type_die (ext_die
, ext_cu
);
7516 /* EXT_CU may not be the same as CU.
7517 Ensure TYPE is recorded in CU's type_hash table. */
7518 return set_die_type (die
, type
, cu
);
7521 name
= namespace_name (die
, &is_anonymous
, cu
);
7523 /* Now build the name of the current namespace. */
7525 previous_prefix
= determine_prefix (die
, cu
);
7526 if (previous_prefix
[0] != '\0')
7527 name
= typename_concat (&objfile
->objfile_obstack
,
7528 previous_prefix
, name
, 0, cu
);
7530 /* Create the type. */
7531 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
7533 TYPE_NAME (type
) = (char *) name
;
7534 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7536 return set_die_type (die
, type
, cu
);
7539 /* Read a C++ namespace. */
7542 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7544 struct objfile
*objfile
= cu
->objfile
;
7548 /* Add a symbol associated to this if we haven't seen the namespace
7549 before. Also, add a using directive if it's an anonymous
7552 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
7556 type
= read_type_die (die
, cu
);
7557 new_symbol (die
, type
, cu
);
7559 name
= namespace_name (die
, &is_anonymous
, cu
);
7562 const char *previous_prefix
= determine_prefix (die
, cu
);
7564 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
7565 NULL
, &objfile
->objfile_obstack
);
7569 if (die
->child
!= NULL
)
7571 struct die_info
*child_die
= die
->child
;
7573 while (child_die
&& child_die
->tag
)
7575 process_die (child_die
, cu
);
7576 child_die
= sibling_die (child_die
);
7581 /* Read a Fortran module as type. This DIE can be only a declaration used for
7582 imported module. Still we need that type as local Fortran "use ... only"
7583 declaration imports depend on the created type in determine_prefix. */
7585 static struct type
*
7586 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7588 struct objfile
*objfile
= cu
->objfile
;
7592 module_name
= dwarf2_name (die
, cu
);
7594 complaint (&symfile_complaints
,
7595 _("DW_TAG_module has no name, offset 0x%x"),
7597 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
7599 /* determine_prefix uses TYPE_TAG_NAME. */
7600 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7602 return set_die_type (die
, type
, cu
);
7605 /* Read a Fortran module. */
7608 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
7610 struct die_info
*child_die
= die
->child
;
7612 while (child_die
&& child_die
->tag
)
7614 process_die (child_die
, cu
);
7615 child_die
= sibling_die (child_die
);
7619 /* Return the name of the namespace represented by DIE. Set
7620 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
7624 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
7626 struct die_info
*current_die
;
7627 const char *name
= NULL
;
7629 /* Loop through the extensions until we find a name. */
7631 for (current_die
= die
;
7632 current_die
!= NULL
;
7633 current_die
= dwarf2_extension (die
, &cu
))
7635 name
= dwarf2_name (current_die
, cu
);
7640 /* Is it an anonymous namespace? */
7642 *is_anonymous
= (name
== NULL
);
7644 name
= "(anonymous namespace)";
7649 /* Extract all information from a DW_TAG_pointer_type DIE and add to
7650 the user defined type vector. */
7652 static struct type
*
7653 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7655 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7656 struct comp_unit_head
*cu_header
= &cu
->header
;
7658 struct attribute
*attr_byte_size
;
7659 struct attribute
*attr_address_class
;
7660 int byte_size
, addr_class
;
7661 struct type
*target_type
;
7663 target_type
= die_type (die
, cu
);
7665 /* The die_type call above may have already set the type for this DIE. */
7666 type
= get_die_type (die
, cu
);
7670 type
= lookup_pointer_type (target_type
);
7672 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7674 byte_size
= DW_UNSND (attr_byte_size
);
7676 byte_size
= cu_header
->addr_size
;
7678 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
7679 if (attr_address_class
)
7680 addr_class
= DW_UNSND (attr_address_class
);
7682 addr_class
= DW_ADDR_none
;
7684 /* If the pointer size or address class is different than the
7685 default, create a type variant marked as such and set the
7686 length accordingly. */
7687 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
7689 if (gdbarch_address_class_type_flags_p (gdbarch
))
7693 type_flags
= gdbarch_address_class_type_flags
7694 (gdbarch
, byte_size
, addr_class
);
7695 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
7697 type
= make_type_with_address_space (type
, type_flags
);
7699 else if (TYPE_LENGTH (type
) != byte_size
)
7701 complaint (&symfile_complaints
,
7702 _("invalid pointer size %d"), byte_size
);
7706 /* Should we also complain about unhandled address classes? */
7710 TYPE_LENGTH (type
) = byte_size
;
7711 return set_die_type (die
, type
, cu
);
7714 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
7715 the user defined type vector. */
7717 static struct type
*
7718 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7721 struct type
*to_type
;
7722 struct type
*domain
;
7724 to_type
= die_type (die
, cu
);
7725 domain
= die_containing_type (die
, cu
);
7727 /* The calls above may have already set the type for this DIE. */
7728 type
= get_die_type (die
, cu
);
7732 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
7733 type
= lookup_methodptr_type (to_type
);
7735 type
= lookup_memberptr_type (to_type
, domain
);
7737 return set_die_type (die
, type
, cu
);
7740 /* Extract all information from a DW_TAG_reference_type DIE and add to
7741 the user defined type vector. */
7743 static struct type
*
7744 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7746 struct comp_unit_head
*cu_header
= &cu
->header
;
7747 struct type
*type
, *target_type
;
7748 struct attribute
*attr
;
7750 target_type
= die_type (die
, cu
);
7752 /* The die_type call above may have already set the type for this DIE. */
7753 type
= get_die_type (die
, cu
);
7757 type
= lookup_reference_type (target_type
);
7758 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7761 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7765 TYPE_LENGTH (type
) = cu_header
->addr_size
;
7767 return set_die_type (die
, type
, cu
);
7770 static struct type
*
7771 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7773 struct type
*base_type
, *cv_type
;
7775 base_type
= die_type (die
, cu
);
7777 /* The die_type call above may have already set the type for this DIE. */
7778 cv_type
= get_die_type (die
, cu
);
7782 /* In case the const qualifier is applied to an array type, the element type
7783 is so qualified, not the array type (section 6.7.3 of C99). */
7784 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
7786 struct type
*el_type
, *inner_array
;
7788 base_type
= copy_type (base_type
);
7789 inner_array
= base_type
;
7791 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
7793 TYPE_TARGET_TYPE (inner_array
) =
7794 copy_type (TYPE_TARGET_TYPE (inner_array
));
7795 inner_array
= TYPE_TARGET_TYPE (inner_array
);
7798 el_type
= TYPE_TARGET_TYPE (inner_array
);
7799 TYPE_TARGET_TYPE (inner_array
) =
7800 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
7802 return set_die_type (die
, base_type
, cu
);
7805 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
7806 return set_die_type (die
, cv_type
, cu
);
7809 static struct type
*
7810 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7812 struct type
*base_type
, *cv_type
;
7814 base_type
= die_type (die
, cu
);
7816 /* The die_type call above may have already set the type for this DIE. */
7817 cv_type
= get_die_type (die
, cu
);
7821 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
7822 return set_die_type (die
, cv_type
, cu
);
7825 /* Extract all information from a DW_TAG_string_type DIE and add to
7826 the user defined type vector. It isn't really a user defined type,
7827 but it behaves like one, with other DIE's using an AT_user_def_type
7828 attribute to reference it. */
7830 static struct type
*
7831 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7833 struct objfile
*objfile
= cu
->objfile
;
7834 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7835 struct type
*type
, *range_type
, *index_type
, *char_type
;
7836 struct attribute
*attr
;
7837 unsigned int length
;
7839 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
7842 length
= DW_UNSND (attr
);
7846 /* Check for the DW_AT_byte_size attribute. */
7847 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7850 length
= DW_UNSND (attr
);
7858 index_type
= objfile_type (objfile
)->builtin_int
;
7859 range_type
= create_range_type (NULL
, index_type
, 1, length
);
7860 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
7861 type
= create_string_type (NULL
, char_type
, range_type
);
7863 return set_die_type (die
, type
, cu
);
7866 /* Handle DIES due to C code like:
7870 int (*funcp)(int a, long l);
7874 ('funcp' generates a DW_TAG_subroutine_type DIE). */
7876 static struct type
*
7877 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7879 struct type
*type
; /* Type that this function returns. */
7880 struct type
*ftype
; /* Function that returns above type. */
7881 struct attribute
*attr
;
7883 type
= die_type (die
, cu
);
7885 /* The die_type call above may have already set the type for this DIE. */
7886 ftype
= get_die_type (die
, cu
);
7890 ftype
= lookup_function_type (type
);
7892 /* All functions in C++, Pascal and Java have prototypes. */
7893 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
7894 if ((attr
&& (DW_UNSND (attr
) != 0))
7895 || cu
->language
== language_cplus
7896 || cu
->language
== language_java
7897 || cu
->language
== language_pascal
)
7898 TYPE_PROTOTYPED (ftype
) = 1;
7899 else if (producer_is_realview (cu
->producer
))
7900 /* RealView does not emit DW_AT_prototyped. We can not
7901 distinguish prototyped and unprototyped functions; default to
7902 prototyped, since that is more common in modern code (and
7903 RealView warns about unprototyped functions). */
7904 TYPE_PROTOTYPED (ftype
) = 1;
7906 /* Store the calling convention in the type if it's available in
7907 the subroutine die. Otherwise set the calling convention to
7908 the default value DW_CC_normal. */
7909 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
7910 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
7912 /* We need to add the subroutine type to the die immediately so
7913 we don't infinitely recurse when dealing with parameters
7914 declared as the same subroutine type. */
7915 set_die_type (die
, ftype
, cu
);
7917 if (die
->child
!= NULL
)
7919 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
7920 struct die_info
*child_die
;
7921 int nparams
, iparams
;
7923 /* Count the number of parameters.
7924 FIXME: GDB currently ignores vararg functions, but knows about
7925 vararg member functions. */
7927 child_die
= die
->child
;
7928 while (child_die
&& child_die
->tag
)
7930 if (child_die
->tag
== DW_TAG_formal_parameter
)
7932 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
7933 TYPE_VARARGS (ftype
) = 1;
7934 child_die
= sibling_die (child_die
);
7937 /* Allocate storage for parameters and fill them in. */
7938 TYPE_NFIELDS (ftype
) = nparams
;
7939 TYPE_FIELDS (ftype
) = (struct field
*)
7940 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
7942 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
7943 even if we error out during the parameters reading below. */
7944 for (iparams
= 0; iparams
< nparams
; iparams
++)
7945 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
7948 child_die
= die
->child
;
7949 while (child_die
&& child_die
->tag
)
7951 if (child_die
->tag
== DW_TAG_formal_parameter
)
7953 struct type
*arg_type
;
7955 /* DWARF version 2 has no clean way to discern C++
7956 static and non-static member functions. G++ helps
7957 GDB by marking the first parameter for non-static
7958 member functions (which is the this pointer) as
7959 artificial. We pass this information to
7960 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
7962 DWARF version 3 added DW_AT_object_pointer, which GCC
7963 4.5 does not yet generate. */
7964 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
7966 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
7969 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
7971 /* GCC/43521: In java, the formal parameter
7972 "this" is sometimes not marked with DW_AT_artificial. */
7973 if (cu
->language
== language_java
)
7975 const char *name
= dwarf2_name (child_die
, cu
);
7977 if (name
&& !strcmp (name
, "this"))
7978 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
7981 arg_type
= die_type (child_die
, cu
);
7983 /* RealView does not mark THIS as const, which the testsuite
7984 expects. GCC marks THIS as const in method definitions,
7985 but not in the class specifications (GCC PR 43053). */
7986 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
7987 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
7990 struct dwarf2_cu
*arg_cu
= cu
;
7991 const char *name
= dwarf2_name (child_die
, cu
);
7993 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
7996 /* If the compiler emits this, use it. */
7997 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
8000 else if (name
&& strcmp (name
, "this") == 0)
8001 /* Function definitions will have the argument names. */
8003 else if (name
== NULL
&& iparams
== 0)
8004 /* Declarations may not have the names, so like
8005 elsewhere in GDB, assume an artificial first
8006 argument is "this". */
8010 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
8014 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
8017 child_die
= sibling_die (child_die
);
8024 static struct type
*
8025 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
8027 struct objfile
*objfile
= cu
->objfile
;
8028 const char *name
= NULL
;
8029 struct type
*this_type
;
8031 name
= dwarf2_full_name (NULL
, die
, cu
);
8032 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
8033 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
8034 TYPE_NAME (this_type
) = (char *) name
;
8035 set_die_type (die
, this_type
, cu
);
8036 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
8040 /* Find a representation of a given base type and install
8041 it in the TYPE field of the die. */
8043 static struct type
*
8044 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8046 struct objfile
*objfile
= cu
->objfile
;
8048 struct attribute
*attr
;
8049 int encoding
= 0, size
= 0;
8051 enum type_code code
= TYPE_CODE_INT
;
8053 struct type
*target_type
= NULL
;
8055 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
8058 encoding
= DW_UNSND (attr
);
8060 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8063 size
= DW_UNSND (attr
);
8065 name
= dwarf2_name (die
, cu
);
8068 complaint (&symfile_complaints
,
8069 _("DW_AT_name missing from DW_TAG_base_type"));
8074 case DW_ATE_address
:
8075 /* Turn DW_ATE_address into a void * pointer. */
8076 code
= TYPE_CODE_PTR
;
8077 type_flags
|= TYPE_FLAG_UNSIGNED
;
8078 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
8080 case DW_ATE_boolean
:
8081 code
= TYPE_CODE_BOOL
;
8082 type_flags
|= TYPE_FLAG_UNSIGNED
;
8084 case DW_ATE_complex_float
:
8085 code
= TYPE_CODE_COMPLEX
;
8086 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
8088 case DW_ATE_decimal_float
:
8089 code
= TYPE_CODE_DECFLOAT
;
8092 code
= TYPE_CODE_FLT
;
8096 case DW_ATE_unsigned
:
8097 type_flags
|= TYPE_FLAG_UNSIGNED
;
8099 case DW_ATE_signed_char
:
8100 if (cu
->language
== language_ada
|| cu
->language
== language_m2
8101 || cu
->language
== language_pascal
)
8102 code
= TYPE_CODE_CHAR
;
8104 case DW_ATE_unsigned_char
:
8105 if (cu
->language
== language_ada
|| cu
->language
== language_m2
8106 || cu
->language
== language_pascal
)
8107 code
= TYPE_CODE_CHAR
;
8108 type_flags
|= TYPE_FLAG_UNSIGNED
;
8111 /* We just treat this as an integer and then recognize the
8112 type by name elsewhere. */
8116 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
8117 dwarf_type_encoding_name (encoding
));
8121 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
8122 TYPE_NAME (type
) = name
;
8123 TYPE_TARGET_TYPE (type
) = target_type
;
8125 if (name
&& strcmp (name
, "char") == 0)
8126 TYPE_NOSIGN (type
) = 1;
8128 return set_die_type (die
, type
, cu
);
8131 /* Read the given DW_AT_subrange DIE. */
8133 static struct type
*
8134 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8136 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
8137 struct type
*base_type
;
8138 struct type
*range_type
;
8139 struct attribute
*attr
;
8143 LONGEST negative_mask
;
8145 base_type
= die_type (die
, cu
);
8146 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
8147 check_typedef (base_type
);
8149 /* The die_type call above may have already set the type for this DIE. */
8150 range_type
= get_die_type (die
, cu
);
8154 if (cu
->language
== language_fortran
)
8156 /* FORTRAN implies a lower bound of 1, if not given. */
8160 /* FIXME: For variable sized arrays either of these could be
8161 a variable rather than a constant value. We'll allow it,
8162 but we don't know how to handle it. */
8163 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
8165 low
= dwarf2_get_attr_constant_value (attr
, 0);
8167 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
8170 if (attr
->form
== DW_FORM_block1
|| is_ref_attr (attr
))
8172 /* GCC encodes arrays with unspecified or dynamic length
8173 with a DW_FORM_block1 attribute or a reference attribute.
8174 FIXME: GDB does not yet know how to handle dynamic
8175 arrays properly, treat them as arrays with unspecified
8178 FIXME: jimb/2003-09-22: GDB does not really know
8179 how to handle arrays of unspecified length
8180 either; we just represent them as zero-length
8181 arrays. Choose an appropriate upper bound given
8182 the lower bound we've computed above. */
8186 high
= dwarf2_get_attr_constant_value (attr
, 1);
8190 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
8193 int count
= dwarf2_get_attr_constant_value (attr
, 1);
8194 high
= low
+ count
- 1;
8198 /* Unspecified array length. */
8203 /* Dwarf-2 specifications explicitly allows to create subrange types
8204 without specifying a base type.
8205 In that case, the base type must be set to the type of
8206 the lower bound, upper bound or count, in that order, if any of these
8207 three attributes references an object that has a type.
8208 If no base type is found, the Dwarf-2 specifications say that
8209 a signed integer type of size equal to the size of an address should
8211 For the following C code: `extern char gdb_int [];'
8212 GCC produces an empty range DIE.
8213 FIXME: muller/2010-05-28: Possible references to object for low bound,
8214 high bound or count are not yet handled by this code. */
8215 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
8217 struct objfile
*objfile
= cu
->objfile
;
8218 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8219 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
8220 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
8222 /* Test "int", "long int", and "long long int" objfile types,
8223 and select the first one having a size above or equal to the
8224 architecture address size. */
8225 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8226 base_type
= int_type
;
8229 int_type
= objfile_type (objfile
)->builtin_long
;
8230 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8231 base_type
= int_type
;
8234 int_type
= objfile_type (objfile
)->builtin_long_long
;
8235 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8236 base_type
= int_type
;
8242 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
8243 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
8244 low
|= negative_mask
;
8245 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
8246 high
|= negative_mask
;
8248 range_type
= create_range_type (NULL
, base_type
, low
, high
);
8250 /* Mark arrays with dynamic length at least as an array of unspecified
8251 length. GDB could check the boundary but before it gets implemented at
8252 least allow accessing the array elements. */
8253 if (attr
&& attr
->form
== DW_FORM_block1
)
8254 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
8256 /* Ada expects an empty array on no boundary attributes. */
8257 if (attr
== NULL
&& cu
->language
!= language_ada
)
8258 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
8260 name
= dwarf2_name (die
, cu
);
8262 TYPE_NAME (range_type
) = name
;
8264 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8266 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
8268 set_die_type (die
, range_type
, cu
);
8270 /* set_die_type should be already done. */
8271 set_descriptive_type (range_type
, die
, cu
);
8276 static struct type
*
8277 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8281 /* For now, we only support the C meaning of an unspecified type: void. */
8283 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
8284 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
8286 return set_die_type (die
, type
, cu
);
8289 /* Trivial hash function for die_info: the hash value of a DIE
8290 is its offset in .debug_info for this objfile. */
8293 die_hash (const void *item
)
8295 const struct die_info
*die
= item
;
8300 /* Trivial comparison function for die_info structures: two DIEs
8301 are equal if they have the same offset. */
8304 die_eq (const void *item_lhs
, const void *item_rhs
)
8306 const struct die_info
*die_lhs
= item_lhs
;
8307 const struct die_info
*die_rhs
= item_rhs
;
8309 return die_lhs
->offset
== die_rhs
->offset
;
8312 /* Read a whole compilation unit into a linked list of dies. */
8314 static struct die_info
*
8315 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
8317 struct die_reader_specs reader_specs
;
8318 int read_abbrevs
= 0;
8319 struct cleanup
*back_to
= NULL
;
8320 struct die_info
*die
;
8322 if (cu
->dwarf2_abbrevs
== NULL
)
8324 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
8325 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
8329 gdb_assert (cu
->die_hash
== NULL
);
8331 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8335 &cu
->comp_unit_obstack
,
8336 hashtab_obstack_allocate
,
8337 dummy_obstack_deallocate
);
8339 init_cu_die_reader (&reader_specs
, cu
);
8341 die
= read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
8344 do_cleanups (back_to
);
8349 /* Main entry point for reading a DIE and all children.
8350 Read the DIE and dump it if requested. */
8352 static struct die_info
*
8353 read_die_and_children (const struct die_reader_specs
*reader
,
8355 gdb_byte
**new_info_ptr
,
8356 struct die_info
*parent
)
8358 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
8359 new_info_ptr
, parent
);
8361 if (dwarf2_die_debug
)
8363 fprintf_unfiltered (gdb_stdlog
,
8364 "\nRead die from %s of %s:\n",
8365 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
8367 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
8369 : "unknown section",
8370 reader
->abfd
->filename
);
8371 dump_die (result
, dwarf2_die_debug
);
8377 /* Read a single die and all its descendents. Set the die's sibling
8378 field to NULL; set other fields in the die correctly, and set all
8379 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
8380 location of the info_ptr after reading all of those dies. PARENT
8381 is the parent of the die in question. */
8383 static struct die_info
*
8384 read_die_and_children_1 (const struct die_reader_specs
*reader
,
8386 gdb_byte
**new_info_ptr
,
8387 struct die_info
*parent
)
8389 struct die_info
*die
;
8393 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
8396 *new_info_ptr
= cur_ptr
;
8399 store_in_ref_table (die
, reader
->cu
);
8402 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
8406 *new_info_ptr
= cur_ptr
;
8409 die
->sibling
= NULL
;
8410 die
->parent
= parent
;
8414 /* Read a die, all of its descendents, and all of its siblings; set
8415 all of the fields of all of the dies correctly. Arguments are as
8416 in read_die_and_children. */
8418 static struct die_info
*
8419 read_die_and_siblings (const struct die_reader_specs
*reader
,
8421 gdb_byte
**new_info_ptr
,
8422 struct die_info
*parent
)
8424 struct die_info
*first_die
, *last_sibling
;
8428 first_die
= last_sibling
= NULL
;
8432 struct die_info
*die
8433 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
8437 *new_info_ptr
= cur_ptr
;
8444 last_sibling
->sibling
= die
;
8450 /* Read the die from the .debug_info section buffer. Set DIEP to
8451 point to a newly allocated die with its information, except for its
8452 child, sibling, and parent fields. Set HAS_CHILDREN to tell
8453 whether the die has children or not. */
8456 read_full_die (const struct die_reader_specs
*reader
,
8457 struct die_info
**diep
, gdb_byte
*info_ptr
,
8460 unsigned int abbrev_number
, bytes_read
, i
, offset
;
8461 struct abbrev_info
*abbrev
;
8462 struct die_info
*die
;
8463 struct dwarf2_cu
*cu
= reader
->cu
;
8464 bfd
*abfd
= reader
->abfd
;
8466 offset
= info_ptr
- reader
->buffer
;
8467 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8468 info_ptr
+= bytes_read
;
8476 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
8478 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
8480 bfd_get_filename (abfd
));
8482 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
8483 die
->offset
= offset
;
8484 die
->tag
= abbrev
->tag
;
8485 die
->abbrev
= abbrev_number
;
8487 die
->num_attrs
= abbrev
->num_attrs
;
8489 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8490 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
8491 abfd
, info_ptr
, cu
);
8494 *has_children
= abbrev
->has_children
;
8498 /* In DWARF version 2, the description of the debugging information is
8499 stored in a separate .debug_abbrev section. Before we read any
8500 dies from a section we read in all abbreviations and install them
8501 in a hash table. This function also sets flags in CU describing
8502 the data found in the abbrev table. */
8505 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
8507 struct comp_unit_head
*cu_header
= &cu
->header
;
8508 gdb_byte
*abbrev_ptr
;
8509 struct abbrev_info
*cur_abbrev
;
8510 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
8511 unsigned int abbrev_form
, hash_number
;
8512 struct attr_abbrev
*cur_attrs
;
8513 unsigned int allocated_attrs
;
8515 /* Initialize dwarf2 abbrevs. */
8516 obstack_init (&cu
->abbrev_obstack
);
8517 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
8519 * sizeof (struct abbrev_info
*)));
8520 memset (cu
->dwarf2_abbrevs
, 0,
8521 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
8523 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
8524 &dwarf2_per_objfile
->abbrev
);
8525 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
8526 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8527 abbrev_ptr
+= bytes_read
;
8529 allocated_attrs
= ATTR_ALLOC_CHUNK
;
8530 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
8532 /* Loop until we reach an abbrev number of 0. */
8533 while (abbrev_number
)
8535 cur_abbrev
= dwarf_alloc_abbrev (cu
);
8537 /* read in abbrev header */
8538 cur_abbrev
->number
= abbrev_number
;
8539 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8540 abbrev_ptr
+= bytes_read
;
8541 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
8544 if (cur_abbrev
->tag
== DW_TAG_namespace
)
8545 cu
->has_namespace_info
= 1;
8547 /* now read in declarations */
8548 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8549 abbrev_ptr
+= bytes_read
;
8550 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8551 abbrev_ptr
+= bytes_read
;
8554 if (cur_abbrev
->num_attrs
== allocated_attrs
)
8556 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
8558 = xrealloc (cur_attrs
, (allocated_attrs
8559 * sizeof (struct attr_abbrev
)));
8562 /* Record whether this compilation unit might have
8563 inter-compilation-unit references. If we don't know what form
8564 this attribute will have, then it might potentially be a
8565 DW_FORM_ref_addr, so we conservatively expect inter-CU
8568 if (abbrev_form
== DW_FORM_ref_addr
8569 || abbrev_form
== DW_FORM_indirect
)
8570 cu
->has_form_ref_addr
= 1;
8572 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
8573 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
8574 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8575 abbrev_ptr
+= bytes_read
;
8576 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8577 abbrev_ptr
+= bytes_read
;
8580 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
8581 (cur_abbrev
->num_attrs
8582 * sizeof (struct attr_abbrev
)));
8583 memcpy (cur_abbrev
->attrs
, cur_attrs
,
8584 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
8586 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
8587 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
8588 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
8590 /* Get next abbreviation.
8591 Under Irix6 the abbreviations for a compilation unit are not
8592 always properly terminated with an abbrev number of 0.
8593 Exit loop if we encounter an abbreviation which we have
8594 already read (which means we are about to read the abbreviations
8595 for the next compile unit) or if the end of the abbreviation
8596 table is reached. */
8597 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
8598 >= dwarf2_per_objfile
->abbrev
.size
)
8600 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8601 abbrev_ptr
+= bytes_read
;
8602 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
8609 /* Release the memory used by the abbrev table for a compilation unit. */
8612 dwarf2_free_abbrev_table (void *ptr_to_cu
)
8614 struct dwarf2_cu
*cu
= ptr_to_cu
;
8616 obstack_free (&cu
->abbrev_obstack
, NULL
);
8617 cu
->dwarf2_abbrevs
= NULL
;
8620 /* Lookup an abbrev_info structure in the abbrev hash table. */
8622 static struct abbrev_info
*
8623 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
8625 unsigned int hash_number
;
8626 struct abbrev_info
*abbrev
;
8628 hash_number
= number
% ABBREV_HASH_SIZE
;
8629 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
8633 if (abbrev
->number
== number
)
8636 abbrev
= abbrev
->next
;
8641 /* Returns nonzero if TAG represents a type that we might generate a partial
8645 is_type_tag_for_partial (int tag
)
8650 /* Some types that would be reasonable to generate partial symbols for,
8651 that we don't at present. */
8652 case DW_TAG_array_type
:
8653 case DW_TAG_file_type
:
8654 case DW_TAG_ptr_to_member_type
:
8655 case DW_TAG_set_type
:
8656 case DW_TAG_string_type
:
8657 case DW_TAG_subroutine_type
:
8659 case DW_TAG_base_type
:
8660 case DW_TAG_class_type
:
8661 case DW_TAG_interface_type
:
8662 case DW_TAG_enumeration_type
:
8663 case DW_TAG_structure_type
:
8664 case DW_TAG_subrange_type
:
8665 case DW_TAG_typedef
:
8666 case DW_TAG_union_type
:
8673 /* Load all DIEs that are interesting for partial symbols into memory. */
8675 static struct partial_die_info
*
8676 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8677 int building_psymtab
, struct dwarf2_cu
*cu
)
8679 struct partial_die_info
*part_die
;
8680 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
8681 struct abbrev_info
*abbrev
;
8682 unsigned int bytes_read
;
8683 unsigned int load_all
= 0;
8685 int nesting_level
= 1;
8690 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
8694 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8698 &cu
->comp_unit_obstack
,
8699 hashtab_obstack_allocate
,
8700 dummy_obstack_deallocate
);
8702 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8703 sizeof (struct partial_die_info
));
8707 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
8709 /* A NULL abbrev means the end of a series of children. */
8712 if (--nesting_level
== 0)
8714 /* PART_DIE was probably the last thing allocated on the
8715 comp_unit_obstack, so we could call obstack_free
8716 here. We don't do that because the waste is small,
8717 and will be cleaned up when we're done with this
8718 compilation unit. This way, we're also more robust
8719 against other users of the comp_unit_obstack. */
8722 info_ptr
+= bytes_read
;
8723 last_die
= parent_die
;
8724 parent_die
= parent_die
->die_parent
;
8728 /* Check for template arguments. We never save these; if
8729 they're seen, we just mark the parent, and go on our way. */
8730 if (parent_die
!= NULL
8731 && cu
->language
== language_cplus
8732 && (abbrev
->tag
== DW_TAG_template_type_param
8733 || abbrev
->tag
== DW_TAG_template_value_param
))
8735 parent_die
->has_template_arguments
= 1;
8739 /* We don't need a partial DIE for the template argument. */
8740 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
,
8746 /* We only recurse into subprograms looking for template arguments.
8747 Skip their other children. */
8749 && cu
->language
== language_cplus
8750 && parent_die
!= NULL
8751 && parent_die
->tag
== DW_TAG_subprogram
)
8753 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8757 /* Check whether this DIE is interesting enough to save. Normally
8758 we would not be interested in members here, but there may be
8759 later variables referencing them via DW_AT_specification (for
8762 && !is_type_tag_for_partial (abbrev
->tag
)
8763 && abbrev
->tag
!= DW_TAG_constant
8764 && abbrev
->tag
!= DW_TAG_enumerator
8765 && abbrev
->tag
!= DW_TAG_subprogram
8766 && abbrev
->tag
!= DW_TAG_lexical_block
8767 && abbrev
->tag
!= DW_TAG_variable
8768 && abbrev
->tag
!= DW_TAG_namespace
8769 && abbrev
->tag
!= DW_TAG_module
8770 && abbrev
->tag
!= DW_TAG_member
)
8772 /* Otherwise we skip to the next sibling, if any. */
8773 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8777 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
8778 buffer
, info_ptr
, cu
);
8780 /* This two-pass algorithm for processing partial symbols has a
8781 high cost in cache pressure. Thus, handle some simple cases
8782 here which cover the majority of C partial symbols. DIEs
8783 which neither have specification tags in them, nor could have
8784 specification tags elsewhere pointing at them, can simply be
8785 processed and discarded.
8787 This segment is also optional; scan_partial_symbols and
8788 add_partial_symbol will handle these DIEs if we chain
8789 them in normally. When compilers which do not emit large
8790 quantities of duplicate debug information are more common,
8791 this code can probably be removed. */
8793 /* Any complete simple types at the top level (pretty much all
8794 of them, for a language without namespaces), can be processed
8796 if (parent_die
== NULL
8797 && part_die
->has_specification
== 0
8798 && part_die
->is_declaration
== 0
8799 && (part_die
->tag
== DW_TAG_typedef
8800 || part_die
->tag
== DW_TAG_base_type
8801 || part_die
->tag
== DW_TAG_subrange_type
))
8803 if (building_psymtab
&& part_die
->name
!= NULL
)
8804 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8805 VAR_DOMAIN
, LOC_TYPEDEF
,
8806 &cu
->objfile
->static_psymbols
,
8807 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8808 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8812 /* If we're at the second level, and we're an enumerator, and
8813 our parent has no specification (meaning possibly lives in a
8814 namespace elsewhere), then we can add the partial symbol now
8815 instead of queueing it. */
8816 if (part_die
->tag
== DW_TAG_enumerator
8817 && parent_die
!= NULL
8818 && parent_die
->die_parent
== NULL
8819 && parent_die
->tag
== DW_TAG_enumeration_type
8820 && parent_die
->has_specification
== 0)
8822 if (part_die
->name
== NULL
)
8823 complaint (&symfile_complaints
,
8824 _("malformed enumerator DIE ignored"));
8825 else if (building_psymtab
)
8826 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8827 VAR_DOMAIN
, LOC_CONST
,
8828 (cu
->language
== language_cplus
8829 || cu
->language
== language_java
)
8830 ? &cu
->objfile
->global_psymbols
8831 : &cu
->objfile
->static_psymbols
,
8832 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8834 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8838 /* We'll save this DIE so link it in. */
8839 part_die
->die_parent
= parent_die
;
8840 part_die
->die_sibling
= NULL
;
8841 part_die
->die_child
= NULL
;
8843 if (last_die
&& last_die
== parent_die
)
8844 last_die
->die_child
= part_die
;
8846 last_die
->die_sibling
= part_die
;
8848 last_die
= part_die
;
8850 if (first_die
== NULL
)
8851 first_die
= part_die
;
8853 /* Maybe add the DIE to the hash table. Not all DIEs that we
8854 find interesting need to be in the hash table, because we
8855 also have the parent/sibling/child chains; only those that we
8856 might refer to by offset later during partial symbol reading.
8858 For now this means things that might have be the target of a
8859 DW_AT_specification, DW_AT_abstract_origin, or
8860 DW_AT_extension. DW_AT_extension will refer only to
8861 namespaces; DW_AT_abstract_origin refers to functions (and
8862 many things under the function DIE, but we do not recurse
8863 into function DIEs during partial symbol reading) and
8864 possibly variables as well; DW_AT_specification refers to
8865 declarations. Declarations ought to have the DW_AT_declaration
8866 flag. It happens that GCC forgets to put it in sometimes, but
8867 only for functions, not for types.
8869 Adding more things than necessary to the hash table is harmless
8870 except for the performance cost. Adding too few will result in
8871 wasted time in find_partial_die, when we reread the compilation
8872 unit with load_all_dies set. */
8875 || abbrev
->tag
== DW_TAG_constant
8876 || abbrev
->tag
== DW_TAG_subprogram
8877 || abbrev
->tag
== DW_TAG_variable
8878 || abbrev
->tag
== DW_TAG_namespace
8879 || part_die
->is_declaration
)
8883 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
8884 part_die
->offset
, INSERT
);
8888 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8889 sizeof (struct partial_die_info
));
8891 /* For some DIEs we want to follow their children (if any). For C
8892 we have no reason to follow the children of structures; for other
8893 languages we have to, so that we can get at method physnames
8894 to infer fully qualified class names, for DW_AT_specification,
8895 and for C++ template arguments. For C++, we also look one level
8896 inside functions to find template arguments (if the name of the
8897 function does not already contain the template arguments).
8899 For Ada, we need to scan the children of subprograms and lexical
8900 blocks as well because Ada allows the definition of nested
8901 entities that could be interesting for the debugger, such as
8902 nested subprograms for instance. */
8903 if (last_die
->has_children
8905 || last_die
->tag
== DW_TAG_namespace
8906 || last_die
->tag
== DW_TAG_module
8907 || last_die
->tag
== DW_TAG_enumeration_type
8908 || (cu
->language
== language_cplus
8909 && last_die
->tag
== DW_TAG_subprogram
8910 && (last_die
->name
== NULL
8911 || strchr (last_die
->name
, '<') == NULL
))
8912 || (cu
->language
!= language_c
8913 && (last_die
->tag
== DW_TAG_class_type
8914 || last_die
->tag
== DW_TAG_interface_type
8915 || last_die
->tag
== DW_TAG_structure_type
8916 || last_die
->tag
== DW_TAG_union_type
))
8917 || (cu
->language
== language_ada
8918 && (last_die
->tag
== DW_TAG_subprogram
8919 || last_die
->tag
== DW_TAG_lexical_block
))))
8922 parent_die
= last_die
;
8926 /* Otherwise we skip to the next sibling, if any. */
8927 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
8929 /* Back to the top, do it again. */
8933 /* Read a minimal amount of information into the minimal die structure. */
8936 read_partial_die (struct partial_die_info
*part_die
,
8937 struct abbrev_info
*abbrev
,
8938 unsigned int abbrev_len
, bfd
*abfd
,
8939 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8940 struct dwarf2_cu
*cu
)
8943 struct attribute attr
;
8944 int has_low_pc_attr
= 0;
8945 int has_high_pc_attr
= 0;
8947 memset (part_die
, 0, sizeof (struct partial_die_info
));
8949 part_die
->offset
= info_ptr
- buffer
;
8951 info_ptr
+= abbrev_len
;
8956 part_die
->tag
= abbrev
->tag
;
8957 part_die
->has_children
= abbrev
->has_children
;
8959 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8961 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
8963 /* Store the data if it is of an attribute we want to keep in a
8964 partial symbol table. */
8968 switch (part_die
->tag
)
8970 case DW_TAG_compile_unit
:
8971 case DW_TAG_type_unit
:
8972 /* Compilation units have a DW_AT_name that is a filename, not
8973 a source language identifier. */
8974 case DW_TAG_enumeration_type
:
8975 case DW_TAG_enumerator
:
8976 /* These tags always have simple identifiers already; no need
8977 to canonicalize them. */
8978 part_die
->name
= DW_STRING (&attr
);
8982 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
8983 &cu
->objfile
->objfile_obstack
);
8987 case DW_AT_linkage_name
:
8988 case DW_AT_MIPS_linkage_name
:
8989 /* Note that both forms of linkage name might appear. We
8990 assume they will be the same, and we only store the last
8992 if (cu
->language
== language_ada
)
8993 part_die
->name
= DW_STRING (&attr
);
8994 part_die
->linkage_name
= DW_STRING (&attr
);
8997 has_low_pc_attr
= 1;
8998 part_die
->lowpc
= DW_ADDR (&attr
);
9001 has_high_pc_attr
= 1;
9002 part_die
->highpc
= DW_ADDR (&attr
);
9004 case DW_AT_location
:
9005 /* Support the .debug_loc offsets. */
9006 if (attr_form_is_block (&attr
))
9008 part_die
->locdesc
= DW_BLOCK (&attr
);
9010 else if (attr_form_is_section_offset (&attr
))
9012 dwarf2_complex_location_expr_complaint ();
9016 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
9017 "partial symbol information");
9020 case DW_AT_external
:
9021 part_die
->is_external
= DW_UNSND (&attr
);
9023 case DW_AT_declaration
:
9024 part_die
->is_declaration
= DW_UNSND (&attr
);
9027 part_die
->has_type
= 1;
9029 case DW_AT_abstract_origin
:
9030 case DW_AT_specification
:
9031 case DW_AT_extension
:
9032 part_die
->has_specification
= 1;
9033 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
9036 /* Ignore absolute siblings, they might point outside of
9037 the current compile unit. */
9038 if (attr
.form
== DW_FORM_ref_addr
)
9039 complaint (&symfile_complaints
,
9040 _("ignoring absolute DW_AT_sibling"));
9042 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
9044 case DW_AT_byte_size
:
9045 part_die
->has_byte_size
= 1;
9047 case DW_AT_calling_convention
:
9048 /* DWARF doesn't provide a way to identify a program's source-level
9049 entry point. DW_AT_calling_convention attributes are only meant
9050 to describe functions' calling conventions.
9052 However, because it's a necessary piece of information in
9053 Fortran, and because DW_CC_program is the only piece of debugging
9054 information whose definition refers to a 'main program' at all,
9055 several compilers have begun marking Fortran main programs with
9056 DW_CC_program --- even when those functions use the standard
9057 calling conventions.
9059 So until DWARF specifies a way to provide this information and
9060 compilers pick up the new representation, we'll support this
9062 if (DW_UNSND (&attr
) == DW_CC_program
9063 && cu
->language
== language_fortran
)
9065 set_main_name (part_die
->name
);
9067 /* As this DIE has a static linkage the name would be difficult
9068 to look up later. */
9069 language_of_main
= language_fortran
;
9077 /* When using the GNU linker, .gnu.linkonce. sections are used to
9078 eliminate duplicate copies of functions and vtables and such.
9079 The linker will arbitrarily choose one and discard the others.
9080 The AT_*_pc values for such functions refer to local labels in
9081 these sections. If the section from that file was discarded, the
9082 labels are not in the output, so the relocs get a value of 0.
9083 If this is a discarded function, mark the pc bounds as invalid,
9084 so that GDB will ignore it. */
9085 if (has_low_pc_attr
&& has_high_pc_attr
9086 && part_die
->lowpc
< part_die
->highpc
9087 && (part_die
->lowpc
!= 0
9088 || dwarf2_per_objfile
->has_section_at_zero
))
9089 part_die
->has_pc_info
= 1;
9094 /* Find a cached partial DIE at OFFSET in CU. */
9096 static struct partial_die_info
*
9097 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
9099 struct partial_die_info
*lookup_die
= NULL
;
9100 struct partial_die_info part_die
;
9102 part_die
.offset
= offset
;
9103 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
9108 /* Find a partial DIE at OFFSET, which may or may not be in CU,
9109 except in the case of .debug_types DIEs which do not reference
9110 outside their CU (they do however referencing other types via
9113 static struct partial_die_info
*
9114 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
9116 struct dwarf2_per_cu_data
*per_cu
= NULL
;
9117 struct partial_die_info
*pd
= NULL
;
9119 if (cu
->per_cu
->from_debug_types
)
9121 pd
= find_partial_die_in_comp_unit (offset
, cu
);
9127 if (offset_in_cu_p (&cu
->header
, offset
))
9129 pd
= find_partial_die_in_comp_unit (offset
, cu
);
9134 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
9136 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
9137 load_partial_comp_unit (per_cu
, cu
->objfile
);
9139 per_cu
->cu
->last_used
= 0;
9140 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
9142 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
9144 struct cleanup
*back_to
;
9145 struct partial_die_info comp_unit_die
;
9146 struct abbrev_info
*abbrev
;
9147 unsigned int bytes_read
;
9150 per_cu
->load_all_dies
= 1;
9152 /* Re-read the DIEs. */
9153 back_to
= make_cleanup (null_cleanup
, 0);
9154 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
9156 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
9157 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
9159 info_ptr
= (dwarf2_per_objfile
->info
.buffer
9160 + per_cu
->cu
->header
.offset
9161 + per_cu
->cu
->header
.first_die_offset
);
9162 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
9163 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
9164 per_cu
->cu
->objfile
->obfd
,
9165 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
9167 if (comp_unit_die
.has_children
)
9168 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
9169 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
9171 do_cleanups (back_to
);
9173 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
9179 internal_error (__FILE__
, __LINE__
,
9180 _("could not find partial DIE 0x%x "
9181 "in cache [from module %s]\n"),
9182 offset
, bfd_get_filename (cu
->objfile
->obfd
));
9186 /* See if we can figure out if the class lives in a namespace. We do
9187 this by looking for a member function; its demangled name will
9188 contain namespace info, if there is any. */
9191 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
9192 struct dwarf2_cu
*cu
)
9194 /* NOTE: carlton/2003-10-07: Getting the info this way changes
9195 what template types look like, because the demangler
9196 frequently doesn't give the same name as the debug info. We
9197 could fix this by only using the demangled name to get the
9198 prefix (but see comment in read_structure_type). */
9200 struct partial_die_info
*real_pdi
;
9201 struct partial_die_info
*child_pdi
;
9203 /* If this DIE (this DIE's specification, if any) has a parent, then
9204 we should not do this. We'll prepend the parent's fully qualified
9205 name when we create the partial symbol. */
9207 real_pdi
= struct_pdi
;
9208 while (real_pdi
->has_specification
)
9209 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
9211 if (real_pdi
->die_parent
!= NULL
)
9214 for (child_pdi
= struct_pdi
->die_child
;
9216 child_pdi
= child_pdi
->die_sibling
)
9218 if (child_pdi
->tag
== DW_TAG_subprogram
9219 && child_pdi
->linkage_name
!= NULL
)
9221 char *actual_class_name
9222 = language_class_name_from_physname (cu
->language_defn
,
9223 child_pdi
->linkage_name
);
9224 if (actual_class_name
!= NULL
)
9227 = obsavestring (actual_class_name
,
9228 strlen (actual_class_name
),
9229 &cu
->objfile
->objfile_obstack
);
9230 xfree (actual_class_name
);
9237 /* Adjust PART_DIE before generating a symbol for it. This function
9238 may set the is_external flag or change the DIE's name. */
9241 fixup_partial_die (struct partial_die_info
*part_die
,
9242 struct dwarf2_cu
*cu
)
9244 /* Once we've fixed up a die, there's no point in doing so again.
9245 This also avoids a memory leak if we were to call
9246 guess_partial_die_structure_name multiple times. */
9247 if (part_die
->fixup_called
)
9250 /* If we found a reference attribute and the DIE has no name, try
9251 to find a name in the referred to DIE. */
9253 if (part_die
->name
== NULL
&& part_die
->has_specification
)
9255 struct partial_die_info
*spec_die
;
9257 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
9259 fixup_partial_die (spec_die
, cu
);
9263 part_die
->name
= spec_die
->name
;
9265 /* Copy DW_AT_external attribute if it is set. */
9266 if (spec_die
->is_external
)
9267 part_die
->is_external
= spec_die
->is_external
;
9271 /* Set default names for some unnamed DIEs. */
9273 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
9274 part_die
->name
= "(anonymous namespace)";
9276 /* If there is no parent die to provide a namespace, and there are
9277 children, see if we can determine the namespace from their linkage
9279 NOTE: We need to do this even if cu->has_namespace_info != 0.
9280 gcc-4.5 -gdwarf-4 can drop the enclosing namespace. */
9281 if (cu
->language
== language_cplus
9282 && dwarf2_per_objfile
->types
.asection
!= NULL
9283 && part_die
->die_parent
== NULL
9284 && part_die
->has_children
9285 && (part_die
->tag
== DW_TAG_class_type
9286 || part_die
->tag
== DW_TAG_structure_type
9287 || part_die
->tag
== DW_TAG_union_type
))
9288 guess_partial_die_structure_name (part_die
, cu
);
9290 part_die
->fixup_called
= 1;
9293 /* Read an attribute value described by an attribute form. */
9296 read_attribute_value (struct attribute
*attr
, unsigned form
,
9297 bfd
*abfd
, gdb_byte
*info_ptr
,
9298 struct dwarf2_cu
*cu
)
9300 struct comp_unit_head
*cu_header
= &cu
->header
;
9301 unsigned int bytes_read
;
9302 struct dwarf_block
*blk
;
9307 case DW_FORM_ref_addr
:
9308 if (cu
->header
.version
== 2)
9309 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9311 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
,
9312 &cu
->header
, &bytes_read
);
9313 info_ptr
+= bytes_read
;
9316 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9317 info_ptr
+= bytes_read
;
9319 case DW_FORM_block2
:
9320 blk
= dwarf_alloc_block (cu
);
9321 blk
->size
= read_2_bytes (abfd
, info_ptr
);
9323 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9324 info_ptr
+= blk
->size
;
9325 DW_BLOCK (attr
) = blk
;
9327 case DW_FORM_block4
:
9328 blk
= dwarf_alloc_block (cu
);
9329 blk
->size
= read_4_bytes (abfd
, info_ptr
);
9331 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9332 info_ptr
+= blk
->size
;
9333 DW_BLOCK (attr
) = blk
;
9336 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
9340 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
9344 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
9347 case DW_FORM_sec_offset
:
9348 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9349 info_ptr
+= bytes_read
;
9351 case DW_FORM_string
:
9352 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
9353 DW_STRING_IS_CANONICAL (attr
) = 0;
9354 info_ptr
+= bytes_read
;
9357 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
9359 DW_STRING_IS_CANONICAL (attr
) = 0;
9360 info_ptr
+= bytes_read
;
9362 case DW_FORM_exprloc
:
9364 blk
= dwarf_alloc_block (cu
);
9365 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9366 info_ptr
+= bytes_read
;
9367 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9368 info_ptr
+= blk
->size
;
9369 DW_BLOCK (attr
) = blk
;
9371 case DW_FORM_block1
:
9372 blk
= dwarf_alloc_block (cu
);
9373 blk
->size
= read_1_byte (abfd
, info_ptr
);
9375 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9376 info_ptr
+= blk
->size
;
9377 DW_BLOCK (attr
) = blk
;
9380 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9384 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9387 case DW_FORM_flag_present
:
9388 DW_UNSND (attr
) = 1;
9391 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
9392 info_ptr
+= bytes_read
;
9395 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9396 info_ptr
+= bytes_read
;
9399 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
9403 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
9407 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
9411 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
9415 /* Convert the signature to something we can record in DW_UNSND
9417 NOTE: This is NULL if the type wasn't found. */
9418 DW_SIGNATURED_TYPE (attr
) =
9419 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
9422 case DW_FORM_ref_udata
:
9423 DW_ADDR (attr
) = (cu
->header
.offset
9424 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
9425 info_ptr
+= bytes_read
;
9427 case DW_FORM_indirect
:
9428 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9429 info_ptr
+= bytes_read
;
9430 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
9433 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
9434 dwarf_form_name (form
),
9435 bfd_get_filename (abfd
));
9438 /* We have seen instances where the compiler tried to emit a byte
9439 size attribute of -1 which ended up being encoded as an unsigned
9440 0xffffffff. Although 0xffffffff is technically a valid size value,
9441 an object of this size seems pretty unlikely so we can relatively
9442 safely treat these cases as if the size attribute was invalid and
9443 treat them as zero by default. */
9444 if (attr
->name
== DW_AT_byte_size
9445 && form
== DW_FORM_data4
9446 && DW_UNSND (attr
) >= 0xffffffff)
9449 (&symfile_complaints
,
9450 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
9451 hex_string (DW_UNSND (attr
)));
9452 DW_UNSND (attr
) = 0;
9458 /* Read an attribute described by an abbreviated attribute. */
9461 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
9462 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
9464 attr
->name
= abbrev
->name
;
9465 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
9468 /* Read dwarf information from a buffer. */
9471 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
9473 return bfd_get_8 (abfd
, buf
);
9477 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
9479 return bfd_get_signed_8 (abfd
, buf
);
9483 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
9485 return bfd_get_16 (abfd
, buf
);
9489 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9491 return bfd_get_signed_16 (abfd
, buf
);
9495 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
9497 return bfd_get_32 (abfd
, buf
);
9501 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9503 return bfd_get_signed_32 (abfd
, buf
);
9507 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
9509 return bfd_get_64 (abfd
, buf
);
9513 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
9514 unsigned int *bytes_read
)
9516 struct comp_unit_head
*cu_header
= &cu
->header
;
9517 CORE_ADDR retval
= 0;
9519 if (cu_header
->signed_addr_p
)
9521 switch (cu_header
->addr_size
)
9524 retval
= bfd_get_signed_16 (abfd
, buf
);
9527 retval
= bfd_get_signed_32 (abfd
, buf
);
9530 retval
= bfd_get_signed_64 (abfd
, buf
);
9533 internal_error (__FILE__
, __LINE__
,
9534 _("read_address: bad switch, signed [in module %s]"),
9535 bfd_get_filename (abfd
));
9540 switch (cu_header
->addr_size
)
9543 retval
= bfd_get_16 (abfd
, buf
);
9546 retval
= bfd_get_32 (abfd
, buf
);
9549 retval
= bfd_get_64 (abfd
, buf
);
9552 internal_error (__FILE__
, __LINE__
,
9553 _("read_address: bad switch, "
9554 "unsigned [in module %s]"),
9555 bfd_get_filename (abfd
));
9559 *bytes_read
= cu_header
->addr_size
;
9563 /* Read the initial length from a section. The (draft) DWARF 3
9564 specification allows the initial length to take up either 4 bytes
9565 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
9566 bytes describe the length and all offsets will be 8 bytes in length
9569 An older, non-standard 64-bit format is also handled by this
9570 function. The older format in question stores the initial length
9571 as an 8-byte quantity without an escape value. Lengths greater
9572 than 2^32 aren't very common which means that the initial 4 bytes
9573 is almost always zero. Since a length value of zero doesn't make
9574 sense for the 32-bit format, this initial zero can be considered to
9575 be an escape value which indicates the presence of the older 64-bit
9576 format. As written, the code can't detect (old format) lengths
9577 greater than 4GB. If it becomes necessary to handle lengths
9578 somewhat larger than 4GB, we could allow other small values (such
9579 as the non-sensical values of 1, 2, and 3) to also be used as
9580 escape values indicating the presence of the old format.
9582 The value returned via bytes_read should be used to increment the
9583 relevant pointer after calling read_initial_length().
9585 [ Note: read_initial_length() and read_offset() are based on the
9586 document entitled "DWARF Debugging Information Format", revision
9587 3, draft 8, dated November 19, 2001. This document was obtained
9590 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
9592 This document is only a draft and is subject to change. (So beware.)
9594 Details regarding the older, non-standard 64-bit format were
9595 determined empirically by examining 64-bit ELF files produced by
9596 the SGI toolchain on an IRIX 6.5 machine.
9598 - Kevin, July 16, 2002
9602 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
9604 LONGEST length
= bfd_get_32 (abfd
, buf
);
9606 if (length
== 0xffffffff)
9608 length
= bfd_get_64 (abfd
, buf
+ 4);
9611 else if (length
== 0)
9613 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
9614 length
= bfd_get_64 (abfd
, buf
);
9625 /* Cover function for read_initial_length.
9626 Returns the length of the object at BUF, and stores the size of the
9627 initial length in *BYTES_READ and stores the size that offsets will be in
9629 If the initial length size is not equivalent to that specified in
9630 CU_HEADER then issue a complaint.
9631 This is useful when reading non-comp-unit headers. */
9634 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
9635 const struct comp_unit_head
*cu_header
,
9636 unsigned int *bytes_read
,
9637 unsigned int *offset_size
)
9639 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
9641 gdb_assert (cu_header
->initial_length_size
== 4
9642 || cu_header
->initial_length_size
== 8
9643 || cu_header
->initial_length_size
== 12);
9645 if (cu_header
->initial_length_size
!= *bytes_read
)
9646 complaint (&symfile_complaints
,
9647 _("intermixed 32-bit and 64-bit DWARF sections"));
9649 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
9653 /* Read an offset from the data stream. The size of the offset is
9654 given by cu_header->offset_size. */
9657 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
9658 unsigned int *bytes_read
)
9660 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
9662 *bytes_read
= cu_header
->offset_size
;
9666 /* Read an offset from the data stream. */
9669 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
9673 switch (offset_size
)
9676 retval
= bfd_get_32 (abfd
, buf
);
9679 retval
= bfd_get_64 (abfd
, buf
);
9682 internal_error (__FILE__
, __LINE__
,
9683 _("read_offset_1: bad switch [in module %s]"),
9684 bfd_get_filename (abfd
));
9691 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
9693 /* If the size of a host char is 8 bits, we can return a pointer
9694 to the buffer, otherwise we have to copy the data to a buffer
9695 allocated on the temporary obstack. */
9696 gdb_assert (HOST_CHAR_BIT
== 8);
9701 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9703 /* If the size of a host char is 8 bits, we can return a pointer
9704 to the string, otherwise we have to copy the string to a buffer
9705 allocated on the temporary obstack. */
9706 gdb_assert (HOST_CHAR_BIT
== 8);
9709 *bytes_read_ptr
= 1;
9712 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
9713 return (char *) buf
;
9717 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
9718 const struct comp_unit_head
*cu_header
,
9719 unsigned int *bytes_read_ptr
)
9721 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
9723 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
9724 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
9726 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
9727 bfd_get_filename (abfd
));
9730 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
9732 error (_("DW_FORM_strp pointing outside of "
9733 ".debug_str section [in module %s]"),
9734 bfd_get_filename (abfd
));
9737 gdb_assert (HOST_CHAR_BIT
== 8);
9738 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
9740 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
9743 static unsigned long
9744 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9746 unsigned long result
;
9747 unsigned int num_read
;
9757 byte
= bfd_get_8 (abfd
, buf
);
9760 result
|= ((unsigned long)(byte
& 127) << shift
);
9761 if ((byte
& 128) == 0)
9767 *bytes_read_ptr
= num_read
;
9772 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9775 int i
, shift
, num_read
;
9784 byte
= bfd_get_8 (abfd
, buf
);
9787 result
|= ((long)(byte
& 127) << shift
);
9789 if ((byte
& 128) == 0)
9794 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
9795 result
|= -(((long)1) << shift
);
9796 *bytes_read_ptr
= num_read
;
9800 /* Return a pointer to just past the end of an LEB128 number in BUF. */
9803 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
9809 byte
= bfd_get_8 (abfd
, buf
);
9811 if ((byte
& 128) == 0)
9817 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
9824 cu
->language
= language_c
;
9826 case DW_LANG_C_plus_plus
:
9827 cu
->language
= language_cplus
;
9830 cu
->language
= language_d
;
9832 case DW_LANG_Fortran77
:
9833 case DW_LANG_Fortran90
:
9834 case DW_LANG_Fortran95
:
9835 cu
->language
= language_fortran
;
9837 case DW_LANG_Mips_Assembler
:
9838 cu
->language
= language_asm
;
9841 cu
->language
= language_java
;
9845 cu
->language
= language_ada
;
9847 case DW_LANG_Modula2
:
9848 cu
->language
= language_m2
;
9850 case DW_LANG_Pascal83
:
9851 cu
->language
= language_pascal
;
9854 cu
->language
= language_objc
;
9856 case DW_LANG_Cobol74
:
9857 case DW_LANG_Cobol85
:
9859 cu
->language
= language_minimal
;
9862 cu
->language_defn
= language_def (cu
->language
);
9865 /* Return the named attribute or NULL if not there. */
9867 static struct attribute
*
9868 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
9871 struct attribute
*spec
= NULL
;
9873 for (i
= 0; i
< die
->num_attrs
; ++i
)
9875 if (die
->attrs
[i
].name
== name
)
9876 return &die
->attrs
[i
];
9877 if (die
->attrs
[i
].name
== DW_AT_specification
9878 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
9879 spec
= &die
->attrs
[i
];
9884 die
= follow_die_ref (die
, spec
, &cu
);
9885 return dwarf2_attr (die
, name
, cu
);
9891 /* Return the named attribute or NULL if not there,
9892 but do not follow DW_AT_specification, etc.
9893 This is for use in contexts where we're reading .debug_types dies.
9894 Following DW_AT_specification, DW_AT_abstract_origin will take us
9895 back up the chain, and we want to go down. */
9897 static struct attribute
*
9898 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
9899 struct dwarf2_cu
*cu
)
9903 for (i
= 0; i
< die
->num_attrs
; ++i
)
9904 if (die
->attrs
[i
].name
== name
)
9905 return &die
->attrs
[i
];
9910 /* Return non-zero iff the attribute NAME is defined for the given DIE,
9911 and holds a non-zero value. This function should only be used for
9912 DW_FORM_flag or DW_FORM_flag_present attributes. */
9915 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
9917 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
9919 return (attr
&& DW_UNSND (attr
));
9923 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
9925 /* A DIE is a declaration if it has a DW_AT_declaration attribute
9926 which value is non-zero. However, we have to be careful with
9927 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
9928 (via dwarf2_flag_true_p) follows this attribute. So we may
9929 end up accidently finding a declaration attribute that belongs
9930 to a different DIE referenced by the specification attribute,
9931 even though the given DIE does not have a declaration attribute. */
9932 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
9933 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
9936 /* Return the die giving the specification for DIE, if there is
9937 one. *SPEC_CU is the CU containing DIE on input, and the CU
9938 containing the return value on output. If there is no
9939 specification, but there is an abstract origin, that is
9942 static struct die_info
*
9943 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
9945 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
9948 if (spec_attr
== NULL
)
9949 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
9951 if (spec_attr
== NULL
)
9954 return follow_die_ref (die
, spec_attr
, spec_cu
);
9957 /* Free the line_header structure *LH, and any arrays and strings it
9959 NOTE: This is also used as a "cleanup" function. */
9962 free_line_header (struct line_header
*lh
)
9964 if (lh
->standard_opcode_lengths
)
9965 xfree (lh
->standard_opcode_lengths
);
9967 /* Remember that all the lh->file_names[i].name pointers are
9968 pointers into debug_line_buffer, and don't need to be freed. */
9970 xfree (lh
->file_names
);
9972 /* Similarly for the include directory names. */
9973 if (lh
->include_dirs
)
9974 xfree (lh
->include_dirs
);
9979 /* Add an entry to LH's include directory table. */
9982 add_include_dir (struct line_header
*lh
, char *include_dir
)
9984 /* Grow the array if necessary. */
9985 if (lh
->include_dirs_size
== 0)
9987 lh
->include_dirs_size
= 1; /* for testing */
9988 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
9989 * sizeof (*lh
->include_dirs
));
9991 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
9993 lh
->include_dirs_size
*= 2;
9994 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
9995 (lh
->include_dirs_size
9996 * sizeof (*lh
->include_dirs
)));
9999 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
10002 /* Add an entry to LH's file name table. */
10005 add_file_name (struct line_header
*lh
,
10007 unsigned int dir_index
,
10008 unsigned int mod_time
,
10009 unsigned int length
)
10011 struct file_entry
*fe
;
10013 /* Grow the array if necessary. */
10014 if (lh
->file_names_size
== 0)
10016 lh
->file_names_size
= 1; /* for testing */
10017 lh
->file_names
= xmalloc (lh
->file_names_size
10018 * sizeof (*lh
->file_names
));
10020 else if (lh
->num_file_names
>= lh
->file_names_size
)
10022 lh
->file_names_size
*= 2;
10023 lh
->file_names
= xrealloc (lh
->file_names
,
10024 (lh
->file_names_size
10025 * sizeof (*lh
->file_names
)));
10028 fe
= &lh
->file_names
[lh
->num_file_names
++];
10030 fe
->dir_index
= dir_index
;
10031 fe
->mod_time
= mod_time
;
10032 fe
->length
= length
;
10033 fe
->included_p
= 0;
10037 /* Read the statement program header starting at OFFSET in
10038 .debug_line, according to the endianness of ABFD. Return a pointer
10039 to a struct line_header, allocated using xmalloc.
10041 NOTE: the strings in the include directory and file name tables of
10042 the returned object point into debug_line_buffer, and must not be
10045 static struct line_header
*
10046 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
10047 struct dwarf2_cu
*cu
)
10049 struct cleanup
*back_to
;
10050 struct line_header
*lh
;
10051 gdb_byte
*line_ptr
;
10052 unsigned int bytes_read
, offset_size
;
10054 char *cur_dir
, *cur_file
;
10056 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
10057 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
10059 complaint (&symfile_complaints
, _("missing .debug_line section"));
10063 /* Make sure that at least there's room for the total_length field.
10064 That could be 12 bytes long, but we're just going to fudge that. */
10065 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
10067 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10071 lh
= xmalloc (sizeof (*lh
));
10072 memset (lh
, 0, sizeof (*lh
));
10073 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
10076 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
10078 /* Read in the header. */
10080 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
10081 &bytes_read
, &offset_size
);
10082 line_ptr
+= bytes_read
;
10083 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
10084 + dwarf2_per_objfile
->line
.size
))
10086 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10089 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
10090 lh
->version
= read_2_bytes (abfd
, line_ptr
);
10092 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
10093 line_ptr
+= offset_size
;
10094 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
10096 if (lh
->version
>= 4)
10098 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
10102 lh
->maximum_ops_per_instruction
= 1;
10104 if (lh
->maximum_ops_per_instruction
== 0)
10106 lh
->maximum_ops_per_instruction
= 1;
10107 complaint (&symfile_complaints
,
10108 _("invalid maximum_ops_per_instruction "
10109 "in `.debug_line' section"));
10112 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
10114 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
10116 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
10118 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
10120 lh
->standard_opcode_lengths
10121 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
10123 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
10124 for (i
= 1; i
< lh
->opcode_base
; ++i
)
10126 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
10130 /* Read directory table. */
10131 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
10133 line_ptr
+= bytes_read
;
10134 add_include_dir (lh
, cur_dir
);
10136 line_ptr
+= bytes_read
;
10138 /* Read file name table. */
10139 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
10141 unsigned int dir_index
, mod_time
, length
;
10143 line_ptr
+= bytes_read
;
10144 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10145 line_ptr
+= bytes_read
;
10146 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10147 line_ptr
+= bytes_read
;
10148 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10149 line_ptr
+= bytes_read
;
10151 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10153 line_ptr
+= bytes_read
;
10154 lh
->statement_program_start
= line_ptr
;
10156 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
10157 + dwarf2_per_objfile
->line
.size
))
10158 complaint (&symfile_complaints
,
10159 _("line number info header doesn't "
10160 "fit in `.debug_line' section"));
10162 discard_cleanups (back_to
);
10166 /* This function exists to work around a bug in certain compilers
10167 (particularly GCC 2.95), in which the first line number marker of a
10168 function does not show up until after the prologue, right before
10169 the second line number marker. This function shifts ADDRESS down
10170 to the beginning of the function if necessary, and is called on
10171 addresses passed to record_line. */
10174 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
10176 struct function_range
*fn
;
10178 /* Find the function_range containing address. */
10182 if (!cu
->cached_fn
)
10183 cu
->cached_fn
= cu
->first_fn
;
10185 fn
= cu
->cached_fn
;
10187 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
10193 while (fn
&& fn
!= cu
->cached_fn
)
10194 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
10204 if (address
!= fn
->lowpc
)
10205 complaint (&symfile_complaints
,
10206 _("misplaced first line number at 0x%lx for '%s'"),
10207 (unsigned long) address
, fn
->name
);
10212 /* Subroutine of dwarf_decode_lines to simplify it.
10213 Return the file name of the psymtab for included file FILE_INDEX
10214 in line header LH of PST.
10215 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10216 If space for the result is malloc'd, it will be freed by a cleanup.
10217 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
10220 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
10221 const struct partial_symtab
*pst
,
10222 const char *comp_dir
)
10224 const struct file_entry fe
= lh
->file_names
[file_index
];
10225 char *include_name
= fe
.name
;
10226 char *include_name_to_compare
= include_name
;
10227 char *dir_name
= NULL
;
10228 const char *pst_filename
;
10229 char *copied_name
= NULL
;
10233 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
10235 if (!IS_ABSOLUTE_PATH (include_name
)
10236 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
10238 /* Avoid creating a duplicate psymtab for PST.
10239 We do this by comparing INCLUDE_NAME and PST_FILENAME.
10240 Before we do the comparison, however, we need to account
10241 for DIR_NAME and COMP_DIR.
10242 First prepend dir_name (if non-NULL). If we still don't
10243 have an absolute path prepend comp_dir (if non-NULL).
10244 However, the directory we record in the include-file's
10245 psymtab does not contain COMP_DIR (to match the
10246 corresponding symtab(s)).
10251 bash$ gcc -g ./hello.c
10252 include_name = "hello.c"
10254 DW_AT_comp_dir = comp_dir = "/tmp"
10255 DW_AT_name = "./hello.c" */
10257 if (dir_name
!= NULL
)
10259 include_name
= concat (dir_name
, SLASH_STRING
,
10260 include_name
, (char *)NULL
);
10261 include_name_to_compare
= include_name
;
10262 make_cleanup (xfree
, include_name
);
10264 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
10266 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
10267 include_name
, (char *)NULL
);
10271 pst_filename
= pst
->filename
;
10272 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
10274 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
10275 pst_filename
, (char *)NULL
);
10276 pst_filename
= copied_name
;
10279 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
10281 if (include_name_to_compare
!= include_name
)
10282 xfree (include_name_to_compare
);
10283 if (copied_name
!= NULL
)
10284 xfree (copied_name
);
10288 return include_name
;
10291 /* Decode the Line Number Program (LNP) for the given line_header
10292 structure and CU. The actual information extracted and the type
10293 of structures created from the LNP depends on the value of PST.
10295 1. If PST is NULL, then this procedure uses the data from the program
10296 to create all necessary symbol tables, and their linetables.
10298 2. If PST is not NULL, this procedure reads the program to determine
10299 the list of files included by the unit represented by PST, and
10300 builds all the associated partial symbol tables.
10302 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10303 It is used for relative paths in the line table.
10304 NOTE: When processing partial symtabs (pst != NULL),
10305 comp_dir == pst->dirname.
10307 NOTE: It is important that psymtabs have the same file name (via strcmp)
10308 as the corresponding symtab. Since COMP_DIR is not used in the name of the
10309 symtab we don't use it in the name of the psymtabs we create.
10310 E.g. expand_line_sal requires this when finding psymtabs to expand.
10311 A good testcase for this is mb-inline.exp. */
10314 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
, bfd
*abfd
,
10315 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
10317 gdb_byte
*line_ptr
, *extended_end
;
10318 gdb_byte
*line_end
;
10319 unsigned int bytes_read
, extended_len
;
10320 unsigned char op_code
, extended_op
, adj_opcode
;
10321 CORE_ADDR baseaddr
;
10322 struct objfile
*objfile
= cu
->objfile
;
10323 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10324 const int decode_for_pst_p
= (pst
!= NULL
);
10325 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
10327 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10329 line_ptr
= lh
->statement_program_start
;
10330 line_end
= lh
->statement_program_end
;
10332 /* Read the statement sequences until there's nothing left. */
10333 while (line_ptr
< line_end
)
10335 /* state machine registers */
10336 CORE_ADDR address
= 0;
10337 unsigned int file
= 1;
10338 unsigned int line
= 1;
10339 unsigned int column
= 0;
10340 int is_stmt
= lh
->default_is_stmt
;
10341 int basic_block
= 0;
10342 int end_sequence
= 0;
10344 unsigned char op_index
= 0;
10346 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
10348 /* Start a subfile for the current file of the state machine. */
10349 /* lh->include_dirs and lh->file_names are 0-based, but the
10350 directory and file name numbers in the statement program
10352 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10356 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10358 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10361 /* Decode the table. */
10362 while (!end_sequence
)
10364 op_code
= read_1_byte (abfd
, line_ptr
);
10366 if (line_ptr
> line_end
)
10368 dwarf2_debug_line_missing_end_sequence_complaint ();
10372 if (op_code
>= lh
->opcode_base
)
10374 /* Special operand. */
10375 adj_opcode
= op_code
- lh
->opcode_base
;
10376 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
10377 / lh
->maximum_ops_per_instruction
)
10378 * lh
->minimum_instruction_length
);
10379 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
10380 % lh
->maximum_ops_per_instruction
);
10381 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
10382 if (lh
->num_file_names
< file
|| file
== 0)
10383 dwarf2_debug_line_missing_file_complaint ();
10384 /* For now we ignore lines not starting on an
10385 instruction boundary. */
10386 else if (op_index
== 0)
10388 lh
->file_names
[file
- 1].included_p
= 1;
10389 if (!decode_for_pst_p
&& is_stmt
)
10391 if (last_subfile
!= current_subfile
)
10393 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10395 record_line (last_subfile
, 0, addr
);
10396 last_subfile
= current_subfile
;
10398 /* Append row to matrix using current values. */
10399 addr
= check_cu_functions (address
, cu
);
10400 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10401 record_line (current_subfile
, line
, addr
);
10406 else switch (op_code
)
10408 case DW_LNS_extended_op
:
10409 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
10411 line_ptr
+= bytes_read
;
10412 extended_end
= line_ptr
+ extended_len
;
10413 extended_op
= read_1_byte (abfd
, line_ptr
);
10415 switch (extended_op
)
10417 case DW_LNE_end_sequence
:
10420 case DW_LNE_set_address
:
10421 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
10423 line_ptr
+= bytes_read
;
10424 address
+= baseaddr
;
10426 case DW_LNE_define_file
:
10429 unsigned int dir_index
, mod_time
, length
;
10431 cur_file
= read_direct_string (abfd
, line_ptr
,
10433 line_ptr
+= bytes_read
;
10435 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10436 line_ptr
+= bytes_read
;
10438 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10439 line_ptr
+= bytes_read
;
10441 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10442 line_ptr
+= bytes_read
;
10443 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10446 case DW_LNE_set_discriminator
:
10447 /* The discriminator is not interesting to the debugger;
10449 line_ptr
= extended_end
;
10452 complaint (&symfile_complaints
,
10453 _("mangled .debug_line section"));
10456 /* Make sure that we parsed the extended op correctly. If e.g.
10457 we expected a different address size than the producer used,
10458 we may have read the wrong number of bytes. */
10459 if (line_ptr
!= extended_end
)
10461 complaint (&symfile_complaints
,
10462 _("mangled .debug_line section"));
10467 if (lh
->num_file_names
< file
|| file
== 0)
10468 dwarf2_debug_line_missing_file_complaint ();
10471 lh
->file_names
[file
- 1].included_p
= 1;
10472 if (!decode_for_pst_p
&& is_stmt
)
10474 if (last_subfile
!= current_subfile
)
10476 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10478 record_line (last_subfile
, 0, addr
);
10479 last_subfile
= current_subfile
;
10481 addr
= check_cu_functions (address
, cu
);
10482 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10483 record_line (current_subfile
, line
, addr
);
10488 case DW_LNS_advance_pc
:
10491 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10493 address
+= (((op_index
+ adjust
)
10494 / lh
->maximum_ops_per_instruction
)
10495 * lh
->minimum_instruction_length
);
10496 op_index
= ((op_index
+ adjust
)
10497 % lh
->maximum_ops_per_instruction
);
10498 line_ptr
+= bytes_read
;
10501 case DW_LNS_advance_line
:
10502 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
10503 line_ptr
+= bytes_read
;
10505 case DW_LNS_set_file
:
10507 /* The arrays lh->include_dirs and lh->file_names are
10508 0-based, but the directory and file name numbers in
10509 the statement program are 1-based. */
10510 struct file_entry
*fe
;
10513 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10514 line_ptr
+= bytes_read
;
10515 if (lh
->num_file_names
< file
|| file
== 0)
10516 dwarf2_debug_line_missing_file_complaint ();
10519 fe
= &lh
->file_names
[file
- 1];
10521 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10522 if (!decode_for_pst_p
)
10524 last_subfile
= current_subfile
;
10525 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10530 case DW_LNS_set_column
:
10531 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10532 line_ptr
+= bytes_read
;
10534 case DW_LNS_negate_stmt
:
10535 is_stmt
= (!is_stmt
);
10537 case DW_LNS_set_basic_block
:
10540 /* Add to the address register of the state machine the
10541 address increment value corresponding to special opcode
10542 255. I.e., this value is scaled by the minimum
10543 instruction length since special opcode 255 would have
10544 scaled the the increment. */
10545 case DW_LNS_const_add_pc
:
10547 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
10549 address
+= (((op_index
+ adjust
)
10550 / lh
->maximum_ops_per_instruction
)
10551 * lh
->minimum_instruction_length
);
10552 op_index
= ((op_index
+ adjust
)
10553 % lh
->maximum_ops_per_instruction
);
10556 case DW_LNS_fixed_advance_pc
:
10557 address
+= read_2_bytes (abfd
, line_ptr
);
10563 /* Unknown standard opcode, ignore it. */
10566 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
10568 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10569 line_ptr
+= bytes_read
;
10574 if (lh
->num_file_names
< file
|| file
== 0)
10575 dwarf2_debug_line_missing_file_complaint ();
10578 lh
->file_names
[file
- 1].included_p
= 1;
10579 if (!decode_for_pst_p
)
10581 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10582 record_line (current_subfile
, 0, addr
);
10587 if (decode_for_pst_p
)
10591 /* Now that we're done scanning the Line Header Program, we can
10592 create the psymtab of each included file. */
10593 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
10594 if (lh
->file_names
[file_index
].included_p
== 1)
10596 char *include_name
=
10597 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
10598 if (include_name
!= NULL
)
10599 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
10604 /* Make sure a symtab is created for every file, even files
10605 which contain only variables (i.e. no code with associated
10609 struct file_entry
*fe
;
10611 for (i
= 0; i
< lh
->num_file_names
; i
++)
10615 fe
= &lh
->file_names
[i
];
10617 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10618 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10620 /* Skip the main file; we don't need it, and it must be
10621 allocated last, so that it will show up before the
10622 non-primary symtabs in the objfile's symtab list. */
10623 if (current_subfile
== first_subfile
)
10626 if (current_subfile
->symtab
== NULL
)
10627 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
10629 fe
->symtab
= current_subfile
->symtab
;
10634 /* Start a subfile for DWARF. FILENAME is the name of the file and
10635 DIRNAME the name of the source directory which contains FILENAME
10636 or NULL if not known. COMP_DIR is the compilation directory for the
10637 linetable's compilation unit or NULL if not known.
10638 This routine tries to keep line numbers from identical absolute and
10639 relative file names in a common subfile.
10641 Using the `list' example from the GDB testsuite, which resides in
10642 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
10643 of /srcdir/list0.c yields the following debugging information for list0.c:
10645 DW_AT_name: /srcdir/list0.c
10646 DW_AT_comp_dir: /compdir
10647 files.files[0].name: list0.h
10648 files.files[0].dir: /srcdir
10649 files.files[1].name: list0.c
10650 files.files[1].dir: /srcdir
10652 The line number information for list0.c has to end up in a single
10653 subfile, so that `break /srcdir/list0.c:1' works as expected.
10654 start_subfile will ensure that this happens provided that we pass the
10655 concatenation of files.files[1].dir and files.files[1].name as the
10659 dwarf2_start_subfile (char *filename
, const char *dirname
,
10660 const char *comp_dir
)
10664 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
10665 `start_symtab' will always pass the contents of DW_AT_comp_dir as
10666 second argument to start_subfile. To be consistent, we do the
10667 same here. In order not to lose the line information directory,
10668 we concatenate it to the filename when it makes sense.
10669 Note that the Dwarf3 standard says (speaking of filenames in line
10670 information): ``The directory index is ignored for file names
10671 that represent full path names''. Thus ignoring dirname in the
10672 `else' branch below isn't an issue. */
10674 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
10675 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
10677 fullname
= filename
;
10679 start_subfile (fullname
, comp_dir
);
10681 if (fullname
!= filename
)
10686 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
10687 struct dwarf2_cu
*cu
)
10689 struct objfile
*objfile
= cu
->objfile
;
10690 struct comp_unit_head
*cu_header
= &cu
->header
;
10692 /* NOTE drow/2003-01-30: There used to be a comment and some special
10693 code here to turn a symbol with DW_AT_external and a
10694 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
10695 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
10696 with some versions of binutils) where shared libraries could have
10697 relocations against symbols in their debug information - the
10698 minimal symbol would have the right address, but the debug info
10699 would not. It's no longer necessary, because we will explicitly
10700 apply relocations when we read in the debug information now. */
10702 /* A DW_AT_location attribute with no contents indicates that a
10703 variable has been optimized away. */
10704 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
10706 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10710 /* Handle one degenerate form of location expression specially, to
10711 preserve GDB's previous behavior when section offsets are
10712 specified. If this is just a DW_OP_addr then mark this symbol
10715 if (attr_form_is_block (attr
)
10716 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
10717 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
10719 unsigned int dummy
;
10721 SYMBOL_VALUE_ADDRESS (sym
) =
10722 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
10723 SYMBOL_CLASS (sym
) = LOC_STATIC
;
10724 fixup_symbol_section (sym
, objfile
);
10725 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
10726 SYMBOL_SECTION (sym
));
10730 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
10731 expression evaluator, and use LOC_COMPUTED only when necessary
10732 (i.e. when the value of a register or memory location is
10733 referenced, or a thread-local block, etc.). Then again, it might
10734 not be worthwhile. I'm assuming that it isn't unless performance
10735 or memory numbers show me otherwise. */
10737 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
10738 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
10741 /* Given a pointer to a DWARF information entry, figure out if we need
10742 to make a symbol table entry for it, and if so, create a new entry
10743 and return a pointer to it.
10744 If TYPE is NULL, determine symbol type from the die, otherwise
10745 used the passed type.
10746 If SPACE is not NULL, use it to hold the new symbol. If it is
10747 NULL, allocate a new symbol on the objfile's obstack. */
10749 static struct symbol
*
10750 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
10751 struct symbol
*space
)
10753 struct objfile
*objfile
= cu
->objfile
;
10754 struct symbol
*sym
= NULL
;
10756 struct attribute
*attr
= NULL
;
10757 struct attribute
*attr2
= NULL
;
10758 CORE_ADDR baseaddr
;
10759 struct pending
**list_to_add
= NULL
;
10761 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
10763 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10765 name
= dwarf2_name (die
, cu
);
10768 const char *linkagename
;
10769 int suppress_add
= 0;
10774 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
10775 OBJSTAT (objfile
, n_syms
++);
10777 /* Cache this symbol's name and the name's demangled form (if any). */
10778 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
10779 linkagename
= dwarf2_physname (name
, die
, cu
);
10780 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
10782 /* Fortran does not have mangling standard and the mangling does differ
10783 between gfortran, iFort etc. */
10784 if (cu
->language
== language_fortran
10785 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
10786 symbol_set_demangled_name (&(sym
->ginfo
),
10787 (char *) dwarf2_full_name (name
, die
, cu
),
10790 /* Default assumptions.
10791 Use the passed type or decode it from the die. */
10792 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10793 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10795 SYMBOL_TYPE (sym
) = type
;
10797 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
10798 attr
= dwarf2_attr (die
,
10799 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
10803 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
10806 attr
= dwarf2_attr (die
,
10807 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
10811 int file_index
= DW_UNSND (attr
);
10813 if (cu
->line_header
== NULL
10814 || file_index
> cu
->line_header
->num_file_names
)
10815 complaint (&symfile_complaints
,
10816 _("file index out of range"));
10817 else if (file_index
> 0)
10819 struct file_entry
*fe
;
10821 fe
= &cu
->line_header
->file_names
[file_index
- 1];
10822 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
10829 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10832 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
10834 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
10835 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
10836 SYMBOL_CLASS (sym
) = LOC_LABEL
;
10837 add_symbol_to_list (sym
, cu
->list_in_scope
);
10839 case DW_TAG_subprogram
:
10840 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10842 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10843 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10844 if ((attr2
&& (DW_UNSND (attr2
) != 0))
10845 || cu
->language
== language_ada
)
10847 /* Subprograms marked external are stored as a global symbol.
10848 Ada subprograms, whether marked external or not, are always
10849 stored as a global symbol, because we want to be able to
10850 access them globally. For instance, we want to be able
10851 to break on a nested subprogram without having to
10852 specify the context. */
10853 list_to_add
= &global_symbols
;
10857 list_to_add
= cu
->list_in_scope
;
10860 case DW_TAG_inlined_subroutine
:
10861 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10863 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10864 SYMBOL_INLINED (sym
) = 1;
10865 /* Do not add the symbol to any lists. It will be found via
10866 BLOCK_FUNCTION from the blockvector. */
10868 case DW_TAG_template_value_param
:
10870 /* Fall through. */
10871 case DW_TAG_constant
:
10872 case DW_TAG_variable
:
10873 case DW_TAG_member
:
10874 /* Compilation with minimal debug info may result in
10875 variables with missing type entries. Change the
10876 misleading `void' type to something sensible. */
10877 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
10879 = objfile_type (objfile
)->nodebug_data_symbol
;
10881 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10882 /* In the case of DW_TAG_member, we should only be called for
10883 static const members. */
10884 if (die
->tag
== DW_TAG_member
)
10886 /* dwarf2_add_field uses die_is_declaration,
10887 so we do the same. */
10888 gdb_assert (die_is_declaration (die
, cu
));
10893 dwarf2_const_value (attr
, sym
, cu
);
10894 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10897 if (attr2
&& (DW_UNSND (attr2
) != 0))
10898 list_to_add
= &global_symbols
;
10900 list_to_add
= cu
->list_in_scope
;
10904 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10907 var_decode_location (attr
, sym
, cu
);
10908 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10909 if (SYMBOL_CLASS (sym
) == LOC_STATIC
10910 && SYMBOL_VALUE_ADDRESS (sym
) == 0
10911 && !dwarf2_per_objfile
->has_section_at_zero
)
10913 /* When a static variable is eliminated by the linker,
10914 the corresponding debug information is not stripped
10915 out, but the variable address is set to null;
10916 do not add such variables into symbol table. */
10918 else if (attr2
&& (DW_UNSND (attr2
) != 0))
10920 /* Workaround gfortran PR debug/40040 - it uses
10921 DW_AT_location for variables in -fPIC libraries which may
10922 get overriden by other libraries/executable and get
10923 a different address. Resolve it by the minimal symbol
10924 which may come from inferior's executable using copy
10925 relocation. Make this workaround only for gfortran as for
10926 other compilers GDB cannot guess the minimal symbol
10927 Fortran mangling kind. */
10928 if (cu
->language
== language_fortran
&& die
->parent
10929 && die
->parent
->tag
== DW_TAG_module
10931 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
10932 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10934 /* A variable with DW_AT_external is never static,
10935 but it may be block-scoped. */
10936 list_to_add
= (cu
->list_in_scope
== &file_symbols
10937 ? &global_symbols
: cu
->list_in_scope
);
10940 list_to_add
= cu
->list_in_scope
;
10944 /* We do not know the address of this symbol.
10945 If it is an external symbol and we have type information
10946 for it, enter the symbol as a LOC_UNRESOLVED symbol.
10947 The address of the variable will then be determined from
10948 the minimal symbol table whenever the variable is
10950 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10951 if (attr2
&& (DW_UNSND (attr2
) != 0)
10952 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
10954 /* A variable with DW_AT_external is never static, but it
10955 may be block-scoped. */
10956 list_to_add
= (cu
->list_in_scope
== &file_symbols
10957 ? &global_symbols
: cu
->list_in_scope
);
10959 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10961 else if (!die_is_declaration (die
, cu
))
10963 /* Use the default LOC_OPTIMIZED_OUT class. */
10964 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
10966 list_to_add
= cu
->list_in_scope
;
10970 case DW_TAG_formal_parameter
:
10971 /* If we are inside a function, mark this as an argument. If
10972 not, we might be looking at an argument to an inlined function
10973 when we do not have enough information to show inlined frames;
10974 pretend it's a local variable in that case so that the user can
10976 if (context_stack_depth
> 0
10977 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
10978 SYMBOL_IS_ARGUMENT (sym
) = 1;
10979 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10982 var_decode_location (attr
, sym
, cu
);
10984 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10987 dwarf2_const_value (attr
, sym
, cu
);
10989 attr
= dwarf2_attr (die
, DW_AT_variable_parameter
, cu
);
10990 if (attr
&& DW_UNSND (attr
))
10992 struct type
*ref_type
;
10994 ref_type
= lookup_reference_type (SYMBOL_TYPE (sym
));
10995 SYMBOL_TYPE (sym
) = ref_type
;
10998 list_to_add
= cu
->list_in_scope
;
11000 case DW_TAG_unspecified_parameters
:
11001 /* From varargs functions; gdb doesn't seem to have any
11002 interest in this information, so just ignore it for now.
11005 case DW_TAG_template_type_param
:
11007 /* Fall through. */
11008 case DW_TAG_class_type
:
11009 case DW_TAG_interface_type
:
11010 case DW_TAG_structure_type
:
11011 case DW_TAG_union_type
:
11012 case DW_TAG_set_type
:
11013 case DW_TAG_enumeration_type
:
11014 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11015 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
11018 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
11019 really ever be static objects: otherwise, if you try
11020 to, say, break of a class's method and you're in a file
11021 which doesn't mention that class, it won't work unless
11022 the check for all static symbols in lookup_symbol_aux
11023 saves you. See the OtherFileClass tests in
11024 gdb.c++/namespace.exp. */
11028 list_to_add
= (cu
->list_in_scope
== &file_symbols
11029 && (cu
->language
== language_cplus
11030 || cu
->language
== language_java
)
11031 ? &global_symbols
: cu
->list_in_scope
);
11033 /* The semantics of C++ state that "struct foo {
11034 ... }" also defines a typedef for "foo". A Java
11035 class declaration also defines a typedef for the
11037 if (cu
->language
== language_cplus
11038 || cu
->language
== language_java
11039 || cu
->language
== language_ada
)
11041 /* The symbol's name is already allocated along
11042 with this objfile, so we don't need to
11043 duplicate it for the type. */
11044 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
11045 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
11050 case DW_TAG_typedef
:
11051 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11052 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11053 list_to_add
= cu
->list_in_scope
;
11055 case DW_TAG_base_type
:
11056 case DW_TAG_subrange_type
:
11057 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11058 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11059 list_to_add
= cu
->list_in_scope
;
11061 case DW_TAG_enumerator
:
11062 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11065 dwarf2_const_value (attr
, sym
, cu
);
11068 /* NOTE: carlton/2003-11-10: See comment above in the
11069 DW_TAG_class_type, etc. block. */
11071 list_to_add
= (cu
->list_in_scope
== &file_symbols
11072 && (cu
->language
== language_cplus
11073 || cu
->language
== language_java
)
11074 ? &global_symbols
: cu
->list_in_scope
);
11077 case DW_TAG_namespace
:
11078 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11079 list_to_add
= &global_symbols
;
11082 /* Not a tag we recognize. Hopefully we aren't processing
11083 trash data, but since we must specifically ignore things
11084 we don't recognize, there is nothing else we should do at
11086 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
11087 dwarf_tag_name (die
->tag
));
11093 sym
->hash_next
= objfile
->template_symbols
;
11094 objfile
->template_symbols
= sym
;
11095 list_to_add
= NULL
;
11098 if (list_to_add
!= NULL
)
11099 add_symbol_to_list (sym
, list_to_add
);
11101 /* For the benefit of old versions of GCC, check for anonymous
11102 namespaces based on the demangled name. */
11103 if (!processing_has_namespace_info
11104 && cu
->language
== language_cplus
)
11105 cp_scan_for_anonymous_namespaces (sym
);
11110 /* A wrapper for new_symbol_full that always allocates a new symbol. */
11112 static struct symbol
*
11113 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11115 return new_symbol_full (die
, type
, cu
, NULL
);
11118 /* Given an attr with a DW_FORM_dataN value in host byte order,
11119 zero-extend it as appropriate for the symbol's type. The DWARF
11120 standard (v4) is not entirely clear about the meaning of using
11121 DW_FORM_dataN for a constant with a signed type, where the type is
11122 wider than the data. The conclusion of a discussion on the DWARF
11123 list was that this is unspecified. We choose to always zero-extend
11124 because that is the interpretation long in use by GCC. */
11127 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
11128 const char *name
, struct obstack
*obstack
,
11129 struct dwarf2_cu
*cu
, long *value
, int bits
)
11131 struct objfile
*objfile
= cu
->objfile
;
11132 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
11133 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
11134 LONGEST l
= DW_UNSND (attr
);
11136 if (bits
< sizeof (*value
) * 8)
11138 l
&= ((LONGEST
) 1 << bits
) - 1;
11141 else if (bits
== sizeof (*value
) * 8)
11145 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
11146 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
11153 /* Read a constant value from an attribute. Either set *VALUE, or if
11154 the value does not fit in *VALUE, set *BYTES - either already
11155 allocated on the objfile obstack, or newly allocated on OBSTACK,
11156 or, set *BATON, if we translated the constant to a location
11160 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
11161 const char *name
, struct obstack
*obstack
,
11162 struct dwarf2_cu
*cu
,
11163 long *value
, gdb_byte
**bytes
,
11164 struct dwarf2_locexpr_baton
**baton
)
11166 struct objfile
*objfile
= cu
->objfile
;
11167 struct comp_unit_head
*cu_header
= &cu
->header
;
11168 struct dwarf_block
*blk
;
11169 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
11170 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
11176 switch (attr
->form
)
11182 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
11183 dwarf2_const_value_length_mismatch_complaint (name
,
11184 cu_header
->addr_size
,
11185 TYPE_LENGTH (type
));
11186 /* Symbols of this form are reasonably rare, so we just
11187 piggyback on the existing location code rather than writing
11188 a new implementation of symbol_computed_ops. */
11189 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
11190 sizeof (struct dwarf2_locexpr_baton
));
11191 (*baton
)->per_cu
= cu
->per_cu
;
11192 gdb_assert ((*baton
)->per_cu
);
11194 (*baton
)->size
= 2 + cu_header
->addr_size
;
11195 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
11196 (*baton
)->data
= data
;
11198 data
[0] = DW_OP_addr
;
11199 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
11200 byte_order
, DW_ADDR (attr
));
11201 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
11204 case DW_FORM_string
:
11206 /* DW_STRING is already allocated on the objfile obstack, point
11208 *bytes
= (gdb_byte
*) DW_STRING (attr
);
11210 case DW_FORM_block1
:
11211 case DW_FORM_block2
:
11212 case DW_FORM_block4
:
11213 case DW_FORM_block
:
11214 case DW_FORM_exprloc
:
11215 blk
= DW_BLOCK (attr
);
11216 if (TYPE_LENGTH (type
) != blk
->size
)
11217 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
11218 TYPE_LENGTH (type
));
11219 *bytes
= blk
->data
;
11222 /* The DW_AT_const_value attributes are supposed to carry the
11223 symbol's value "represented as it would be on the target
11224 architecture." By the time we get here, it's already been
11225 converted to host endianness, so we just need to sign- or
11226 zero-extend it as appropriate. */
11227 case DW_FORM_data1
:
11228 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11229 obstack
, cu
, value
, 8);
11231 case DW_FORM_data2
:
11232 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11233 obstack
, cu
, value
, 16);
11235 case DW_FORM_data4
:
11236 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11237 obstack
, cu
, value
, 32);
11239 case DW_FORM_data8
:
11240 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11241 obstack
, cu
, value
, 64);
11244 case DW_FORM_sdata
:
11245 *value
= DW_SND (attr
);
11248 case DW_FORM_udata
:
11249 *value
= DW_UNSND (attr
);
11253 complaint (&symfile_complaints
,
11254 _("unsupported const value attribute form: '%s'"),
11255 dwarf_form_name (attr
->form
));
11262 /* Copy constant value from an attribute to a symbol. */
11265 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
11266 struct dwarf2_cu
*cu
)
11268 struct objfile
*objfile
= cu
->objfile
;
11269 struct comp_unit_head
*cu_header
= &cu
->header
;
11272 struct dwarf2_locexpr_baton
*baton
;
11274 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
11275 SYMBOL_PRINT_NAME (sym
),
11276 &objfile
->objfile_obstack
, cu
,
11277 &value
, &bytes
, &baton
);
11281 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11282 SYMBOL_LOCATION_BATON (sym
) = baton
;
11283 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11285 else if (bytes
!= NULL
)
11287 SYMBOL_VALUE_BYTES (sym
) = bytes
;
11288 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
11292 SYMBOL_VALUE (sym
) = value
;
11293 SYMBOL_CLASS (sym
) = LOC_CONST
;
11297 /* Return the type of the die in question using its DW_AT_type attribute. */
11299 static struct type
*
11300 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11302 struct attribute
*type_attr
;
11304 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
11307 /* A missing DW_AT_type represents a void type. */
11308 return objfile_type (cu
->objfile
)->builtin_void
;
11311 return lookup_die_type (die
, type_attr
, cu
);
11314 /* True iff CU's producer generates GNAT Ada auxiliary information
11315 that allows to find parallel types through that information instead
11316 of having to do expensive parallel lookups by type name. */
11319 need_gnat_info (struct dwarf2_cu
*cu
)
11321 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
11322 of GNAT produces this auxiliary information, without any indication
11323 that it is produced. Part of enhancing the FSF version of GNAT
11324 to produce that information will be to put in place an indicator
11325 that we can use in order to determine whether the descriptive type
11326 info is available or not. One suggestion that has been made is
11327 to use a new attribute, attached to the CU die. For now, assume
11328 that the descriptive type info is not available. */
11332 /* Return the auxiliary type of the die in question using its
11333 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
11334 attribute is not present. */
11336 static struct type
*
11337 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11339 struct attribute
*type_attr
;
11341 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
11345 return lookup_die_type (die
, type_attr
, cu
);
11348 /* If DIE has a descriptive_type attribute, then set the TYPE's
11349 descriptive type accordingly. */
11352 set_descriptive_type (struct type
*type
, struct die_info
*die
,
11353 struct dwarf2_cu
*cu
)
11355 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
11357 if (descriptive_type
)
11359 ALLOCATE_GNAT_AUX_TYPE (type
);
11360 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
11364 /* Return the containing type of the die in question using its
11365 DW_AT_containing_type attribute. */
11367 static struct type
*
11368 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11370 struct attribute
*type_attr
;
11372 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
11374 error (_("Dwarf Error: Problem turning containing type into gdb type "
11375 "[in module %s]"), cu
->objfile
->name
);
11377 return lookup_die_type (die
, type_attr
, cu
);
11380 /* Look up the type of DIE in CU using its type attribute ATTR.
11381 If there is no type substitute an error marker. */
11383 static struct type
*
11384 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
11385 struct dwarf2_cu
*cu
)
11387 struct type
*this_type
;
11389 /* First see if we have it cached. */
11391 if (is_ref_attr (attr
))
11393 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
11395 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
11397 else if (attr
->form
== DW_FORM_sig8
)
11399 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
11400 struct dwarf2_cu
*sig_cu
;
11401 unsigned int offset
;
11403 /* sig_type will be NULL if the signatured type is missing from
11405 if (sig_type
== NULL
)
11406 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11407 "at 0x%x [in module %s]"),
11408 die
->offset
, cu
->objfile
->name
);
11410 gdb_assert (sig_type
->per_cu
.from_debug_types
);
11411 offset
= sig_type
->offset
+ sig_type
->type_offset
;
11412 this_type
= get_die_type_at_offset (offset
, &sig_type
->per_cu
);
11416 dump_die_for_error (die
);
11417 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
11418 dwarf_attr_name (attr
->name
), cu
->objfile
->name
);
11421 /* If not cached we need to read it in. */
11423 if (this_type
== NULL
)
11425 struct die_info
*type_die
;
11426 struct dwarf2_cu
*type_cu
= cu
;
11428 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11429 /* If the type is cached, we should have found it above. */
11430 gdb_assert (get_die_type (type_die
, type_cu
) == NULL
);
11431 this_type
= read_type_die_1 (type_die
, type_cu
);
11434 /* If we still don't have a type use an error marker. */
11436 if (this_type
== NULL
)
11438 char *message
, *saved
;
11440 /* read_type_die already issued a complaint. */
11441 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
11445 saved
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
11446 message
, strlen (message
));
11449 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, cu
->objfile
);
11455 /* Return the type in DIE, CU.
11456 Returns NULL for invalid types.
11458 This first does a lookup in the appropriate type_hash table,
11459 and only reads the die in if necessary.
11461 NOTE: This can be called when reading in partial or full symbols. */
11463 static struct type
*
11464 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
11466 struct type
*this_type
;
11468 this_type
= get_die_type (die
, cu
);
11472 return read_type_die_1 (die
, cu
);
11475 /* Read the type in DIE, CU.
11476 Returns NULL for invalid types. */
11478 static struct type
*
11479 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
11481 struct type
*this_type
= NULL
;
11485 case DW_TAG_class_type
:
11486 case DW_TAG_interface_type
:
11487 case DW_TAG_structure_type
:
11488 case DW_TAG_union_type
:
11489 this_type
= read_structure_type (die
, cu
);
11491 case DW_TAG_enumeration_type
:
11492 this_type
= read_enumeration_type (die
, cu
);
11494 case DW_TAG_subprogram
:
11495 case DW_TAG_subroutine_type
:
11496 case DW_TAG_inlined_subroutine
:
11497 this_type
= read_subroutine_type (die
, cu
);
11499 case DW_TAG_array_type
:
11500 this_type
= read_array_type (die
, cu
);
11502 case DW_TAG_set_type
:
11503 this_type
= read_set_type (die
, cu
);
11505 case DW_TAG_pointer_type
:
11506 this_type
= read_tag_pointer_type (die
, cu
);
11508 case DW_TAG_ptr_to_member_type
:
11509 this_type
= read_tag_ptr_to_member_type (die
, cu
);
11511 case DW_TAG_reference_type
:
11512 this_type
= read_tag_reference_type (die
, cu
);
11514 case DW_TAG_const_type
:
11515 this_type
= read_tag_const_type (die
, cu
);
11517 case DW_TAG_volatile_type
:
11518 this_type
= read_tag_volatile_type (die
, cu
);
11520 case DW_TAG_string_type
:
11521 this_type
= read_tag_string_type (die
, cu
);
11523 case DW_TAG_typedef
:
11524 this_type
= read_typedef (die
, cu
);
11526 case DW_TAG_subrange_type
:
11527 this_type
= read_subrange_type (die
, cu
);
11529 case DW_TAG_base_type
:
11530 this_type
= read_base_type (die
, cu
);
11532 case DW_TAG_unspecified_type
:
11533 this_type
= read_unspecified_type (die
, cu
);
11535 case DW_TAG_namespace
:
11536 this_type
= read_namespace_type (die
, cu
);
11538 case DW_TAG_module
:
11539 this_type
= read_module_type (die
, cu
);
11542 complaint (&symfile_complaints
,
11543 _("unexpected tag in read_type_die: '%s'"),
11544 dwarf_tag_name (die
->tag
));
11551 /* See if we can figure out if the class lives in a namespace. We do
11552 this by looking for a member function; its demangled name will
11553 contain namespace info, if there is any.
11554 Return the computed name or NULL.
11555 Space for the result is allocated on the objfile's obstack.
11556 This is the full-die version of guess_partial_die_structure_name.
11557 In this case we know DIE has no useful parent. */
11560 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11562 struct die_info
*spec_die
;
11563 struct dwarf2_cu
*spec_cu
;
11564 struct die_info
*child
;
11567 spec_die
= die_specification (die
, &spec_cu
);
11568 if (spec_die
!= NULL
)
11574 for (child
= die
->child
;
11576 child
= child
->sibling
)
11578 if (child
->tag
== DW_TAG_subprogram
)
11580 struct attribute
*attr
;
11582 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
11584 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
11588 = language_class_name_from_physname (cu
->language_defn
,
11592 if (actual_name
!= NULL
)
11594 char *die_name
= dwarf2_name (die
, cu
);
11596 if (die_name
!= NULL
11597 && strcmp (die_name
, actual_name
) != 0)
11599 /* Strip off the class name from the full name.
11600 We want the prefix. */
11601 int die_name_len
= strlen (die_name
);
11602 int actual_name_len
= strlen (actual_name
);
11604 /* Test for '::' as a sanity check. */
11605 if (actual_name_len
> die_name_len
+ 2
11606 && actual_name
[actual_name_len
11607 - die_name_len
- 1] == ':')
11609 obsavestring (actual_name
,
11610 actual_name_len
- die_name_len
- 2,
11611 &cu
->objfile
->objfile_obstack
);
11614 xfree (actual_name
);
11623 /* Return the name of the namespace/class that DIE is defined within,
11624 or "" if we can't tell. The caller should not xfree the result.
11626 For example, if we're within the method foo() in the following
11636 then determine_prefix on foo's die will return "N::C". */
11639 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
11641 struct die_info
*parent
, *spec_die
;
11642 struct dwarf2_cu
*spec_cu
;
11643 struct type
*parent_type
;
11645 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
11646 && cu
->language
!= language_fortran
)
11649 /* We have to be careful in the presence of DW_AT_specification.
11650 For example, with GCC 3.4, given the code
11654 // Definition of N::foo.
11658 then we'll have a tree of DIEs like this:
11660 1: DW_TAG_compile_unit
11661 2: DW_TAG_namespace // N
11662 3: DW_TAG_subprogram // declaration of N::foo
11663 4: DW_TAG_subprogram // definition of N::foo
11664 DW_AT_specification // refers to die #3
11666 Thus, when processing die #4, we have to pretend that we're in
11667 the context of its DW_AT_specification, namely the contex of die
11670 spec_die
= die_specification (die
, &spec_cu
);
11671 if (spec_die
== NULL
)
11672 parent
= die
->parent
;
11675 parent
= spec_die
->parent
;
11679 if (parent
== NULL
)
11681 else if (parent
->building_fullname
)
11684 const char *parent_name
;
11686 /* It has been seen on RealView 2.2 built binaries,
11687 DW_TAG_template_type_param types actually _defined_ as
11688 children of the parent class:
11691 template class <class Enum> Class{};
11692 Class<enum E> class_e;
11694 1: DW_TAG_class_type (Class)
11695 2: DW_TAG_enumeration_type (E)
11696 3: DW_TAG_enumerator (enum1:0)
11697 3: DW_TAG_enumerator (enum2:1)
11699 2: DW_TAG_template_type_param
11700 DW_AT_type DW_FORM_ref_udata (E)
11702 Besides being broken debug info, it can put GDB into an
11703 infinite loop. Consider:
11705 When we're building the full name for Class<E>, we'll start
11706 at Class, and go look over its template type parameters,
11707 finding E. We'll then try to build the full name of E, and
11708 reach here. We're now trying to build the full name of E,
11709 and look over the parent DIE for containing scope. In the
11710 broken case, if we followed the parent DIE of E, we'd again
11711 find Class, and once again go look at its template type
11712 arguments, etc., etc. Simply don't consider such parent die
11713 as source-level parent of this die (it can't be, the language
11714 doesn't allow it), and break the loop here. */
11715 name
= dwarf2_name (die
, cu
);
11716 parent_name
= dwarf2_name (parent
, cu
);
11717 complaint (&symfile_complaints
,
11718 _("template param type '%s' defined within parent '%s'"),
11719 name
? name
: "<unknown>",
11720 parent_name
? parent_name
: "<unknown>");
11724 switch (parent
->tag
)
11726 case DW_TAG_namespace
:
11727 parent_type
= read_type_die (parent
, cu
);
11728 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
11729 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
11730 Work around this problem here. */
11731 if (cu
->language
== language_cplus
11732 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
11734 /* We give a name to even anonymous namespaces. */
11735 return TYPE_TAG_NAME (parent_type
);
11736 case DW_TAG_class_type
:
11737 case DW_TAG_interface_type
:
11738 case DW_TAG_structure_type
:
11739 case DW_TAG_union_type
:
11740 case DW_TAG_module
:
11741 parent_type
= read_type_die (parent
, cu
);
11742 if (TYPE_TAG_NAME (parent_type
) != NULL
)
11743 return TYPE_TAG_NAME (parent_type
);
11745 /* An anonymous structure is only allowed non-static data
11746 members; no typedefs, no member functions, et cetera.
11747 So it does not need a prefix. */
11749 case DW_TAG_compile_unit
:
11750 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
11751 if (cu
->language
== language_cplus
11752 && dwarf2_per_objfile
->types
.asection
!= NULL
11753 && die
->child
!= NULL
11754 && (die
->tag
== DW_TAG_class_type
11755 || die
->tag
== DW_TAG_structure_type
11756 || die
->tag
== DW_TAG_union_type
))
11758 char *name
= guess_full_die_structure_name (die
, cu
);
11764 return determine_prefix (parent
, cu
);
11768 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
11769 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
11770 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
11771 an obconcat, otherwise allocate storage for the result. The CU argument is
11772 used to determine the language and hence, the appropriate separator. */
11774 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
11777 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
11778 int physname
, struct dwarf2_cu
*cu
)
11780 const char *lead
= "";
11783 if (suffix
== NULL
|| suffix
[0] == '\0'
11784 || prefix
== NULL
|| prefix
[0] == '\0')
11786 else if (cu
->language
== language_java
)
11788 else if (cu
->language
== language_fortran
&& physname
)
11790 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
11791 DW_AT_MIPS_linkage_name is preferred and used instead. */
11799 if (prefix
== NULL
)
11801 if (suffix
== NULL
)
11807 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
11809 strcpy (retval
, lead
);
11810 strcat (retval
, prefix
);
11811 strcat (retval
, sep
);
11812 strcat (retval
, suffix
);
11817 /* We have an obstack. */
11818 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
11822 /* Return sibling of die, NULL if no sibling. */
11824 static struct die_info
*
11825 sibling_die (struct die_info
*die
)
11827 return die
->sibling
;
11830 /* Get name of a die, return NULL if not found. */
11833 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
11834 struct obstack
*obstack
)
11836 if (name
&& cu
->language
== language_cplus
)
11838 char *canon_name
= cp_canonicalize_string (name
);
11840 if (canon_name
!= NULL
)
11842 if (strcmp (canon_name
, name
) != 0)
11843 name
= obsavestring (canon_name
, strlen (canon_name
),
11845 xfree (canon_name
);
11852 /* Get name of a die, return NULL if not found. */
11855 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11857 struct attribute
*attr
;
11859 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11860 if (!attr
|| !DW_STRING (attr
))
11865 case DW_TAG_compile_unit
:
11866 /* Compilation units have a DW_AT_name that is a filename, not
11867 a source language identifier. */
11868 case DW_TAG_enumeration_type
:
11869 case DW_TAG_enumerator
:
11870 /* These tags always have simple identifiers already; no need
11871 to canonicalize them. */
11872 return DW_STRING (attr
);
11874 case DW_TAG_subprogram
:
11875 /* Java constructors will all be named "<init>", so return
11876 the class name when we see this special case. */
11877 if (cu
->language
== language_java
11878 && DW_STRING (attr
) != NULL
11879 && strcmp (DW_STRING (attr
), "<init>") == 0)
11881 struct dwarf2_cu
*spec_cu
= cu
;
11882 struct die_info
*spec_die
;
11884 /* GCJ will output '<init>' for Java constructor names.
11885 For this special case, return the name of the parent class. */
11887 /* GCJ may output suprogram DIEs with AT_specification set.
11888 If so, use the name of the specified DIE. */
11889 spec_die
= die_specification (die
, &spec_cu
);
11890 if (spec_die
!= NULL
)
11891 return dwarf2_name (spec_die
, spec_cu
);
11896 if (die
->tag
== DW_TAG_class_type
)
11897 return dwarf2_name (die
, cu
);
11899 while (die
->tag
!= DW_TAG_compile_unit
);
11903 case DW_TAG_class_type
:
11904 case DW_TAG_interface_type
:
11905 case DW_TAG_structure_type
:
11906 case DW_TAG_union_type
:
11907 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
11908 structures or unions. These were of the form "._%d" in GCC 4.1,
11909 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
11910 and GCC 4.4. We work around this problem by ignoring these. */
11911 if (strncmp (DW_STRING (attr
), "._", 2) == 0
11912 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
11920 if (!DW_STRING_IS_CANONICAL (attr
))
11923 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
11924 &cu
->objfile
->objfile_obstack
);
11925 DW_STRING_IS_CANONICAL (attr
) = 1;
11927 return DW_STRING (attr
);
11930 /* Return the die that this die in an extension of, or NULL if there
11931 is none. *EXT_CU is the CU containing DIE on input, and the CU
11932 containing the return value on output. */
11934 static struct die_info
*
11935 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
11937 struct attribute
*attr
;
11939 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
11943 return follow_die_ref (die
, attr
, ext_cu
);
11946 /* Convert a DIE tag into its string name. */
11949 dwarf_tag_name (unsigned tag
)
11953 case DW_TAG_padding
:
11954 return "DW_TAG_padding";
11955 case DW_TAG_array_type
:
11956 return "DW_TAG_array_type";
11957 case DW_TAG_class_type
:
11958 return "DW_TAG_class_type";
11959 case DW_TAG_entry_point
:
11960 return "DW_TAG_entry_point";
11961 case DW_TAG_enumeration_type
:
11962 return "DW_TAG_enumeration_type";
11963 case DW_TAG_formal_parameter
:
11964 return "DW_TAG_formal_parameter";
11965 case DW_TAG_imported_declaration
:
11966 return "DW_TAG_imported_declaration";
11968 return "DW_TAG_label";
11969 case DW_TAG_lexical_block
:
11970 return "DW_TAG_lexical_block";
11971 case DW_TAG_member
:
11972 return "DW_TAG_member";
11973 case DW_TAG_pointer_type
:
11974 return "DW_TAG_pointer_type";
11975 case DW_TAG_reference_type
:
11976 return "DW_TAG_reference_type";
11977 case DW_TAG_compile_unit
:
11978 return "DW_TAG_compile_unit";
11979 case DW_TAG_string_type
:
11980 return "DW_TAG_string_type";
11981 case DW_TAG_structure_type
:
11982 return "DW_TAG_structure_type";
11983 case DW_TAG_subroutine_type
:
11984 return "DW_TAG_subroutine_type";
11985 case DW_TAG_typedef
:
11986 return "DW_TAG_typedef";
11987 case DW_TAG_union_type
:
11988 return "DW_TAG_union_type";
11989 case DW_TAG_unspecified_parameters
:
11990 return "DW_TAG_unspecified_parameters";
11991 case DW_TAG_variant
:
11992 return "DW_TAG_variant";
11993 case DW_TAG_common_block
:
11994 return "DW_TAG_common_block";
11995 case DW_TAG_common_inclusion
:
11996 return "DW_TAG_common_inclusion";
11997 case DW_TAG_inheritance
:
11998 return "DW_TAG_inheritance";
11999 case DW_TAG_inlined_subroutine
:
12000 return "DW_TAG_inlined_subroutine";
12001 case DW_TAG_module
:
12002 return "DW_TAG_module";
12003 case DW_TAG_ptr_to_member_type
:
12004 return "DW_TAG_ptr_to_member_type";
12005 case DW_TAG_set_type
:
12006 return "DW_TAG_set_type";
12007 case DW_TAG_subrange_type
:
12008 return "DW_TAG_subrange_type";
12009 case DW_TAG_with_stmt
:
12010 return "DW_TAG_with_stmt";
12011 case DW_TAG_access_declaration
:
12012 return "DW_TAG_access_declaration";
12013 case DW_TAG_base_type
:
12014 return "DW_TAG_base_type";
12015 case DW_TAG_catch_block
:
12016 return "DW_TAG_catch_block";
12017 case DW_TAG_const_type
:
12018 return "DW_TAG_const_type";
12019 case DW_TAG_constant
:
12020 return "DW_TAG_constant";
12021 case DW_TAG_enumerator
:
12022 return "DW_TAG_enumerator";
12023 case DW_TAG_file_type
:
12024 return "DW_TAG_file_type";
12025 case DW_TAG_friend
:
12026 return "DW_TAG_friend";
12027 case DW_TAG_namelist
:
12028 return "DW_TAG_namelist";
12029 case DW_TAG_namelist_item
:
12030 return "DW_TAG_namelist_item";
12031 case DW_TAG_packed_type
:
12032 return "DW_TAG_packed_type";
12033 case DW_TAG_subprogram
:
12034 return "DW_TAG_subprogram";
12035 case DW_TAG_template_type_param
:
12036 return "DW_TAG_template_type_param";
12037 case DW_TAG_template_value_param
:
12038 return "DW_TAG_template_value_param";
12039 case DW_TAG_thrown_type
:
12040 return "DW_TAG_thrown_type";
12041 case DW_TAG_try_block
:
12042 return "DW_TAG_try_block";
12043 case DW_TAG_variant_part
:
12044 return "DW_TAG_variant_part";
12045 case DW_TAG_variable
:
12046 return "DW_TAG_variable";
12047 case DW_TAG_volatile_type
:
12048 return "DW_TAG_volatile_type";
12049 case DW_TAG_dwarf_procedure
:
12050 return "DW_TAG_dwarf_procedure";
12051 case DW_TAG_restrict_type
:
12052 return "DW_TAG_restrict_type";
12053 case DW_TAG_interface_type
:
12054 return "DW_TAG_interface_type";
12055 case DW_TAG_namespace
:
12056 return "DW_TAG_namespace";
12057 case DW_TAG_imported_module
:
12058 return "DW_TAG_imported_module";
12059 case DW_TAG_unspecified_type
:
12060 return "DW_TAG_unspecified_type";
12061 case DW_TAG_partial_unit
:
12062 return "DW_TAG_partial_unit";
12063 case DW_TAG_imported_unit
:
12064 return "DW_TAG_imported_unit";
12065 case DW_TAG_condition
:
12066 return "DW_TAG_condition";
12067 case DW_TAG_shared_type
:
12068 return "DW_TAG_shared_type";
12069 case DW_TAG_type_unit
:
12070 return "DW_TAG_type_unit";
12071 case DW_TAG_MIPS_loop
:
12072 return "DW_TAG_MIPS_loop";
12073 case DW_TAG_HP_array_descriptor
:
12074 return "DW_TAG_HP_array_descriptor";
12075 case DW_TAG_format_label
:
12076 return "DW_TAG_format_label";
12077 case DW_TAG_function_template
:
12078 return "DW_TAG_function_template";
12079 case DW_TAG_class_template
:
12080 return "DW_TAG_class_template";
12081 case DW_TAG_GNU_BINCL
:
12082 return "DW_TAG_GNU_BINCL";
12083 case DW_TAG_GNU_EINCL
:
12084 return "DW_TAG_GNU_EINCL";
12085 case DW_TAG_upc_shared_type
:
12086 return "DW_TAG_upc_shared_type";
12087 case DW_TAG_upc_strict_type
:
12088 return "DW_TAG_upc_strict_type";
12089 case DW_TAG_upc_relaxed_type
:
12090 return "DW_TAG_upc_relaxed_type";
12091 case DW_TAG_PGI_kanji_type
:
12092 return "DW_TAG_PGI_kanji_type";
12093 case DW_TAG_PGI_interface_block
:
12094 return "DW_TAG_PGI_interface_block";
12096 return "DW_TAG_<unknown>";
12100 /* Convert a DWARF attribute code into its string name. */
12103 dwarf_attr_name (unsigned attr
)
12107 case DW_AT_sibling
:
12108 return "DW_AT_sibling";
12109 case DW_AT_location
:
12110 return "DW_AT_location";
12112 return "DW_AT_name";
12113 case DW_AT_ordering
:
12114 return "DW_AT_ordering";
12115 case DW_AT_subscr_data
:
12116 return "DW_AT_subscr_data";
12117 case DW_AT_byte_size
:
12118 return "DW_AT_byte_size";
12119 case DW_AT_bit_offset
:
12120 return "DW_AT_bit_offset";
12121 case DW_AT_bit_size
:
12122 return "DW_AT_bit_size";
12123 case DW_AT_element_list
:
12124 return "DW_AT_element_list";
12125 case DW_AT_stmt_list
:
12126 return "DW_AT_stmt_list";
12128 return "DW_AT_low_pc";
12129 case DW_AT_high_pc
:
12130 return "DW_AT_high_pc";
12131 case DW_AT_language
:
12132 return "DW_AT_language";
12134 return "DW_AT_member";
12136 return "DW_AT_discr";
12137 case DW_AT_discr_value
:
12138 return "DW_AT_discr_value";
12139 case DW_AT_visibility
:
12140 return "DW_AT_visibility";
12142 return "DW_AT_import";
12143 case DW_AT_string_length
:
12144 return "DW_AT_string_length";
12145 case DW_AT_common_reference
:
12146 return "DW_AT_common_reference";
12147 case DW_AT_comp_dir
:
12148 return "DW_AT_comp_dir";
12149 case DW_AT_const_value
:
12150 return "DW_AT_const_value";
12151 case DW_AT_containing_type
:
12152 return "DW_AT_containing_type";
12153 case DW_AT_default_value
:
12154 return "DW_AT_default_value";
12156 return "DW_AT_inline";
12157 case DW_AT_is_optional
:
12158 return "DW_AT_is_optional";
12159 case DW_AT_lower_bound
:
12160 return "DW_AT_lower_bound";
12161 case DW_AT_producer
:
12162 return "DW_AT_producer";
12163 case DW_AT_prototyped
:
12164 return "DW_AT_prototyped";
12165 case DW_AT_return_addr
:
12166 return "DW_AT_return_addr";
12167 case DW_AT_start_scope
:
12168 return "DW_AT_start_scope";
12169 case DW_AT_bit_stride
:
12170 return "DW_AT_bit_stride";
12171 case DW_AT_upper_bound
:
12172 return "DW_AT_upper_bound";
12173 case DW_AT_abstract_origin
:
12174 return "DW_AT_abstract_origin";
12175 case DW_AT_accessibility
:
12176 return "DW_AT_accessibility";
12177 case DW_AT_address_class
:
12178 return "DW_AT_address_class";
12179 case DW_AT_artificial
:
12180 return "DW_AT_artificial";
12181 case DW_AT_base_types
:
12182 return "DW_AT_base_types";
12183 case DW_AT_calling_convention
:
12184 return "DW_AT_calling_convention";
12186 return "DW_AT_count";
12187 case DW_AT_data_member_location
:
12188 return "DW_AT_data_member_location";
12189 case DW_AT_decl_column
:
12190 return "DW_AT_decl_column";
12191 case DW_AT_decl_file
:
12192 return "DW_AT_decl_file";
12193 case DW_AT_decl_line
:
12194 return "DW_AT_decl_line";
12195 case DW_AT_declaration
:
12196 return "DW_AT_declaration";
12197 case DW_AT_discr_list
:
12198 return "DW_AT_discr_list";
12199 case DW_AT_encoding
:
12200 return "DW_AT_encoding";
12201 case DW_AT_external
:
12202 return "DW_AT_external";
12203 case DW_AT_frame_base
:
12204 return "DW_AT_frame_base";
12206 return "DW_AT_friend";
12207 case DW_AT_identifier_case
:
12208 return "DW_AT_identifier_case";
12209 case DW_AT_macro_info
:
12210 return "DW_AT_macro_info";
12211 case DW_AT_namelist_items
:
12212 return "DW_AT_namelist_items";
12213 case DW_AT_priority
:
12214 return "DW_AT_priority";
12215 case DW_AT_segment
:
12216 return "DW_AT_segment";
12217 case DW_AT_specification
:
12218 return "DW_AT_specification";
12219 case DW_AT_static_link
:
12220 return "DW_AT_static_link";
12222 return "DW_AT_type";
12223 case DW_AT_use_location
:
12224 return "DW_AT_use_location";
12225 case DW_AT_variable_parameter
:
12226 return "DW_AT_variable_parameter";
12227 case DW_AT_virtuality
:
12228 return "DW_AT_virtuality";
12229 case DW_AT_vtable_elem_location
:
12230 return "DW_AT_vtable_elem_location";
12231 /* DWARF 3 values. */
12232 case DW_AT_allocated
:
12233 return "DW_AT_allocated";
12234 case DW_AT_associated
:
12235 return "DW_AT_associated";
12236 case DW_AT_data_location
:
12237 return "DW_AT_data_location";
12238 case DW_AT_byte_stride
:
12239 return "DW_AT_byte_stride";
12240 case DW_AT_entry_pc
:
12241 return "DW_AT_entry_pc";
12242 case DW_AT_use_UTF8
:
12243 return "DW_AT_use_UTF8";
12244 case DW_AT_extension
:
12245 return "DW_AT_extension";
12247 return "DW_AT_ranges";
12248 case DW_AT_trampoline
:
12249 return "DW_AT_trampoline";
12250 case DW_AT_call_column
:
12251 return "DW_AT_call_column";
12252 case DW_AT_call_file
:
12253 return "DW_AT_call_file";
12254 case DW_AT_call_line
:
12255 return "DW_AT_call_line";
12256 case DW_AT_description
:
12257 return "DW_AT_description";
12258 case DW_AT_binary_scale
:
12259 return "DW_AT_binary_scale";
12260 case DW_AT_decimal_scale
:
12261 return "DW_AT_decimal_scale";
12263 return "DW_AT_small";
12264 case DW_AT_decimal_sign
:
12265 return "DW_AT_decimal_sign";
12266 case DW_AT_digit_count
:
12267 return "DW_AT_digit_count";
12268 case DW_AT_picture_string
:
12269 return "DW_AT_picture_string";
12270 case DW_AT_mutable
:
12271 return "DW_AT_mutable";
12272 case DW_AT_threads_scaled
:
12273 return "DW_AT_threads_scaled";
12274 case DW_AT_explicit
:
12275 return "DW_AT_explicit";
12276 case DW_AT_object_pointer
:
12277 return "DW_AT_object_pointer";
12278 case DW_AT_endianity
:
12279 return "DW_AT_endianity";
12280 case DW_AT_elemental
:
12281 return "DW_AT_elemental";
12283 return "DW_AT_pure";
12284 case DW_AT_recursive
:
12285 return "DW_AT_recursive";
12286 /* DWARF 4 values. */
12287 case DW_AT_signature
:
12288 return "DW_AT_signature";
12289 case DW_AT_linkage_name
:
12290 return "DW_AT_linkage_name";
12291 /* SGI/MIPS extensions. */
12292 #ifdef MIPS /* collides with DW_AT_HP_block_index */
12293 case DW_AT_MIPS_fde
:
12294 return "DW_AT_MIPS_fde";
12296 case DW_AT_MIPS_loop_begin
:
12297 return "DW_AT_MIPS_loop_begin";
12298 case DW_AT_MIPS_tail_loop_begin
:
12299 return "DW_AT_MIPS_tail_loop_begin";
12300 case DW_AT_MIPS_epilog_begin
:
12301 return "DW_AT_MIPS_epilog_begin";
12302 case DW_AT_MIPS_loop_unroll_factor
:
12303 return "DW_AT_MIPS_loop_unroll_factor";
12304 case DW_AT_MIPS_software_pipeline_depth
:
12305 return "DW_AT_MIPS_software_pipeline_depth";
12306 case DW_AT_MIPS_linkage_name
:
12307 return "DW_AT_MIPS_linkage_name";
12308 case DW_AT_MIPS_stride
:
12309 return "DW_AT_MIPS_stride";
12310 case DW_AT_MIPS_abstract_name
:
12311 return "DW_AT_MIPS_abstract_name";
12312 case DW_AT_MIPS_clone_origin
:
12313 return "DW_AT_MIPS_clone_origin";
12314 case DW_AT_MIPS_has_inlines
:
12315 return "DW_AT_MIPS_has_inlines";
12316 /* HP extensions. */
12317 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
12318 case DW_AT_HP_block_index
:
12319 return "DW_AT_HP_block_index";
12321 case DW_AT_HP_unmodifiable
:
12322 return "DW_AT_HP_unmodifiable";
12323 case DW_AT_HP_actuals_stmt_list
:
12324 return "DW_AT_HP_actuals_stmt_list";
12325 case DW_AT_HP_proc_per_section
:
12326 return "DW_AT_HP_proc_per_section";
12327 case DW_AT_HP_raw_data_ptr
:
12328 return "DW_AT_HP_raw_data_ptr";
12329 case DW_AT_HP_pass_by_reference
:
12330 return "DW_AT_HP_pass_by_reference";
12331 case DW_AT_HP_opt_level
:
12332 return "DW_AT_HP_opt_level";
12333 case DW_AT_HP_prof_version_id
:
12334 return "DW_AT_HP_prof_version_id";
12335 case DW_AT_HP_opt_flags
:
12336 return "DW_AT_HP_opt_flags";
12337 case DW_AT_HP_cold_region_low_pc
:
12338 return "DW_AT_HP_cold_region_low_pc";
12339 case DW_AT_HP_cold_region_high_pc
:
12340 return "DW_AT_HP_cold_region_high_pc";
12341 case DW_AT_HP_all_variables_modifiable
:
12342 return "DW_AT_HP_all_variables_modifiable";
12343 case DW_AT_HP_linkage_name
:
12344 return "DW_AT_HP_linkage_name";
12345 case DW_AT_HP_prof_flags
:
12346 return "DW_AT_HP_prof_flags";
12347 /* GNU extensions. */
12348 case DW_AT_sf_names
:
12349 return "DW_AT_sf_names";
12350 case DW_AT_src_info
:
12351 return "DW_AT_src_info";
12352 case DW_AT_mac_info
:
12353 return "DW_AT_mac_info";
12354 case DW_AT_src_coords
:
12355 return "DW_AT_src_coords";
12356 case DW_AT_body_begin
:
12357 return "DW_AT_body_begin";
12358 case DW_AT_body_end
:
12359 return "DW_AT_body_end";
12360 case DW_AT_GNU_vector
:
12361 return "DW_AT_GNU_vector";
12362 case DW_AT_GNU_odr_signature
:
12363 return "DW_AT_GNU_odr_signature";
12364 /* VMS extensions. */
12365 case DW_AT_VMS_rtnbeg_pd_address
:
12366 return "DW_AT_VMS_rtnbeg_pd_address";
12367 /* UPC extension. */
12368 case DW_AT_upc_threads_scaled
:
12369 return "DW_AT_upc_threads_scaled";
12370 /* PGI (STMicroelectronics) extensions. */
12371 case DW_AT_PGI_lbase
:
12372 return "DW_AT_PGI_lbase";
12373 case DW_AT_PGI_soffset
:
12374 return "DW_AT_PGI_soffset";
12375 case DW_AT_PGI_lstride
:
12376 return "DW_AT_PGI_lstride";
12378 return "DW_AT_<unknown>";
12382 /* Convert a DWARF value form code into its string name. */
12385 dwarf_form_name (unsigned form
)
12390 return "DW_FORM_addr";
12391 case DW_FORM_block2
:
12392 return "DW_FORM_block2";
12393 case DW_FORM_block4
:
12394 return "DW_FORM_block4";
12395 case DW_FORM_data2
:
12396 return "DW_FORM_data2";
12397 case DW_FORM_data4
:
12398 return "DW_FORM_data4";
12399 case DW_FORM_data8
:
12400 return "DW_FORM_data8";
12401 case DW_FORM_string
:
12402 return "DW_FORM_string";
12403 case DW_FORM_block
:
12404 return "DW_FORM_block";
12405 case DW_FORM_block1
:
12406 return "DW_FORM_block1";
12407 case DW_FORM_data1
:
12408 return "DW_FORM_data1";
12410 return "DW_FORM_flag";
12411 case DW_FORM_sdata
:
12412 return "DW_FORM_sdata";
12414 return "DW_FORM_strp";
12415 case DW_FORM_udata
:
12416 return "DW_FORM_udata";
12417 case DW_FORM_ref_addr
:
12418 return "DW_FORM_ref_addr";
12420 return "DW_FORM_ref1";
12422 return "DW_FORM_ref2";
12424 return "DW_FORM_ref4";
12426 return "DW_FORM_ref8";
12427 case DW_FORM_ref_udata
:
12428 return "DW_FORM_ref_udata";
12429 case DW_FORM_indirect
:
12430 return "DW_FORM_indirect";
12431 case DW_FORM_sec_offset
:
12432 return "DW_FORM_sec_offset";
12433 case DW_FORM_exprloc
:
12434 return "DW_FORM_exprloc";
12435 case DW_FORM_flag_present
:
12436 return "DW_FORM_flag_present";
12438 return "DW_FORM_sig8";
12440 return "DW_FORM_<unknown>";
12444 /* Convert a DWARF stack opcode into its string name. */
12447 dwarf_stack_op_name (unsigned op
, int def
)
12452 return "DW_OP_addr";
12454 return "DW_OP_deref";
12455 case DW_OP_const1u
:
12456 return "DW_OP_const1u";
12457 case DW_OP_const1s
:
12458 return "DW_OP_const1s";
12459 case DW_OP_const2u
:
12460 return "DW_OP_const2u";
12461 case DW_OP_const2s
:
12462 return "DW_OP_const2s";
12463 case DW_OP_const4u
:
12464 return "DW_OP_const4u";
12465 case DW_OP_const4s
:
12466 return "DW_OP_const4s";
12467 case DW_OP_const8u
:
12468 return "DW_OP_const8u";
12469 case DW_OP_const8s
:
12470 return "DW_OP_const8s";
12472 return "DW_OP_constu";
12474 return "DW_OP_consts";
12476 return "DW_OP_dup";
12478 return "DW_OP_drop";
12480 return "DW_OP_over";
12482 return "DW_OP_pick";
12484 return "DW_OP_swap";
12486 return "DW_OP_rot";
12488 return "DW_OP_xderef";
12490 return "DW_OP_abs";
12492 return "DW_OP_and";
12494 return "DW_OP_div";
12496 return "DW_OP_minus";
12498 return "DW_OP_mod";
12500 return "DW_OP_mul";
12502 return "DW_OP_neg";
12504 return "DW_OP_not";
12508 return "DW_OP_plus";
12509 case DW_OP_plus_uconst
:
12510 return "DW_OP_plus_uconst";
12512 return "DW_OP_shl";
12514 return "DW_OP_shr";
12516 return "DW_OP_shra";
12518 return "DW_OP_xor";
12520 return "DW_OP_bra";
12534 return "DW_OP_skip";
12536 return "DW_OP_lit0";
12538 return "DW_OP_lit1";
12540 return "DW_OP_lit2";
12542 return "DW_OP_lit3";
12544 return "DW_OP_lit4";
12546 return "DW_OP_lit5";
12548 return "DW_OP_lit6";
12550 return "DW_OP_lit7";
12552 return "DW_OP_lit8";
12554 return "DW_OP_lit9";
12556 return "DW_OP_lit10";
12558 return "DW_OP_lit11";
12560 return "DW_OP_lit12";
12562 return "DW_OP_lit13";
12564 return "DW_OP_lit14";
12566 return "DW_OP_lit15";
12568 return "DW_OP_lit16";
12570 return "DW_OP_lit17";
12572 return "DW_OP_lit18";
12574 return "DW_OP_lit19";
12576 return "DW_OP_lit20";
12578 return "DW_OP_lit21";
12580 return "DW_OP_lit22";
12582 return "DW_OP_lit23";
12584 return "DW_OP_lit24";
12586 return "DW_OP_lit25";
12588 return "DW_OP_lit26";
12590 return "DW_OP_lit27";
12592 return "DW_OP_lit28";
12594 return "DW_OP_lit29";
12596 return "DW_OP_lit30";
12598 return "DW_OP_lit31";
12600 return "DW_OP_reg0";
12602 return "DW_OP_reg1";
12604 return "DW_OP_reg2";
12606 return "DW_OP_reg3";
12608 return "DW_OP_reg4";
12610 return "DW_OP_reg5";
12612 return "DW_OP_reg6";
12614 return "DW_OP_reg7";
12616 return "DW_OP_reg8";
12618 return "DW_OP_reg9";
12620 return "DW_OP_reg10";
12622 return "DW_OP_reg11";
12624 return "DW_OP_reg12";
12626 return "DW_OP_reg13";
12628 return "DW_OP_reg14";
12630 return "DW_OP_reg15";
12632 return "DW_OP_reg16";
12634 return "DW_OP_reg17";
12636 return "DW_OP_reg18";
12638 return "DW_OP_reg19";
12640 return "DW_OP_reg20";
12642 return "DW_OP_reg21";
12644 return "DW_OP_reg22";
12646 return "DW_OP_reg23";
12648 return "DW_OP_reg24";
12650 return "DW_OP_reg25";
12652 return "DW_OP_reg26";
12654 return "DW_OP_reg27";
12656 return "DW_OP_reg28";
12658 return "DW_OP_reg29";
12660 return "DW_OP_reg30";
12662 return "DW_OP_reg31";
12664 return "DW_OP_breg0";
12666 return "DW_OP_breg1";
12668 return "DW_OP_breg2";
12670 return "DW_OP_breg3";
12672 return "DW_OP_breg4";
12674 return "DW_OP_breg5";
12676 return "DW_OP_breg6";
12678 return "DW_OP_breg7";
12680 return "DW_OP_breg8";
12682 return "DW_OP_breg9";
12684 return "DW_OP_breg10";
12686 return "DW_OP_breg11";
12688 return "DW_OP_breg12";
12690 return "DW_OP_breg13";
12692 return "DW_OP_breg14";
12694 return "DW_OP_breg15";
12696 return "DW_OP_breg16";
12698 return "DW_OP_breg17";
12700 return "DW_OP_breg18";
12702 return "DW_OP_breg19";
12704 return "DW_OP_breg20";
12706 return "DW_OP_breg21";
12708 return "DW_OP_breg22";
12710 return "DW_OP_breg23";
12712 return "DW_OP_breg24";
12714 return "DW_OP_breg25";
12716 return "DW_OP_breg26";
12718 return "DW_OP_breg27";
12720 return "DW_OP_breg28";
12722 return "DW_OP_breg29";
12724 return "DW_OP_breg30";
12726 return "DW_OP_breg31";
12728 return "DW_OP_regx";
12730 return "DW_OP_fbreg";
12732 return "DW_OP_bregx";
12734 return "DW_OP_piece";
12735 case DW_OP_deref_size
:
12736 return "DW_OP_deref_size";
12737 case DW_OP_xderef_size
:
12738 return "DW_OP_xderef_size";
12740 return "DW_OP_nop";
12741 /* DWARF 3 extensions. */
12742 case DW_OP_push_object_address
:
12743 return "DW_OP_push_object_address";
12745 return "DW_OP_call2";
12747 return "DW_OP_call4";
12748 case DW_OP_call_ref
:
12749 return "DW_OP_call_ref";
12750 case DW_OP_form_tls_address
:
12751 return "DW_OP_form_tls_address";
12752 case DW_OP_call_frame_cfa
:
12753 return "DW_OP_call_frame_cfa";
12754 case DW_OP_bit_piece
:
12755 return "DW_OP_bit_piece";
12756 /* DWARF 4 extensions. */
12757 case DW_OP_implicit_value
:
12758 return "DW_OP_implicit_value";
12759 case DW_OP_stack_value
:
12760 return "DW_OP_stack_value";
12761 /* GNU extensions. */
12762 case DW_OP_GNU_push_tls_address
:
12763 return "DW_OP_GNU_push_tls_address";
12764 case DW_OP_GNU_uninit
:
12765 return "DW_OP_GNU_uninit";
12766 case DW_OP_GNU_implicit_pointer
:
12767 return "DW_OP_GNU_implicit_pointer";
12769 return def
? "OP_<unknown>" : NULL
;
12774 dwarf_bool_name (unsigned mybool
)
12782 /* Convert a DWARF type code into its string name. */
12785 dwarf_type_encoding_name (unsigned enc
)
12790 return "DW_ATE_void";
12791 case DW_ATE_address
:
12792 return "DW_ATE_address";
12793 case DW_ATE_boolean
:
12794 return "DW_ATE_boolean";
12795 case DW_ATE_complex_float
:
12796 return "DW_ATE_complex_float";
12798 return "DW_ATE_float";
12799 case DW_ATE_signed
:
12800 return "DW_ATE_signed";
12801 case DW_ATE_signed_char
:
12802 return "DW_ATE_signed_char";
12803 case DW_ATE_unsigned
:
12804 return "DW_ATE_unsigned";
12805 case DW_ATE_unsigned_char
:
12806 return "DW_ATE_unsigned_char";
12808 case DW_ATE_imaginary_float
:
12809 return "DW_ATE_imaginary_float";
12810 case DW_ATE_packed_decimal
:
12811 return "DW_ATE_packed_decimal";
12812 case DW_ATE_numeric_string
:
12813 return "DW_ATE_numeric_string";
12814 case DW_ATE_edited
:
12815 return "DW_ATE_edited";
12816 case DW_ATE_signed_fixed
:
12817 return "DW_ATE_signed_fixed";
12818 case DW_ATE_unsigned_fixed
:
12819 return "DW_ATE_unsigned_fixed";
12820 case DW_ATE_decimal_float
:
12821 return "DW_ATE_decimal_float";
12824 return "DW_ATE_UTF";
12825 /* HP extensions. */
12826 case DW_ATE_HP_float80
:
12827 return "DW_ATE_HP_float80";
12828 case DW_ATE_HP_complex_float80
:
12829 return "DW_ATE_HP_complex_float80";
12830 case DW_ATE_HP_float128
:
12831 return "DW_ATE_HP_float128";
12832 case DW_ATE_HP_complex_float128
:
12833 return "DW_ATE_HP_complex_float128";
12834 case DW_ATE_HP_floathpintel
:
12835 return "DW_ATE_HP_floathpintel";
12836 case DW_ATE_HP_imaginary_float80
:
12837 return "DW_ATE_HP_imaginary_float80";
12838 case DW_ATE_HP_imaginary_float128
:
12839 return "DW_ATE_HP_imaginary_float128";
12841 return "DW_ATE_<unknown>";
12845 /* Convert a DWARF call frame info operation to its string name. */
12849 dwarf_cfi_name (unsigned cfi_opc
)
12853 case DW_CFA_advance_loc
:
12854 return "DW_CFA_advance_loc";
12855 case DW_CFA_offset
:
12856 return "DW_CFA_offset";
12857 case DW_CFA_restore
:
12858 return "DW_CFA_restore";
12860 return "DW_CFA_nop";
12861 case DW_CFA_set_loc
:
12862 return "DW_CFA_set_loc";
12863 case DW_CFA_advance_loc1
:
12864 return "DW_CFA_advance_loc1";
12865 case DW_CFA_advance_loc2
:
12866 return "DW_CFA_advance_loc2";
12867 case DW_CFA_advance_loc4
:
12868 return "DW_CFA_advance_loc4";
12869 case DW_CFA_offset_extended
:
12870 return "DW_CFA_offset_extended";
12871 case DW_CFA_restore_extended
:
12872 return "DW_CFA_restore_extended";
12873 case DW_CFA_undefined
:
12874 return "DW_CFA_undefined";
12875 case DW_CFA_same_value
:
12876 return "DW_CFA_same_value";
12877 case DW_CFA_register
:
12878 return "DW_CFA_register";
12879 case DW_CFA_remember_state
:
12880 return "DW_CFA_remember_state";
12881 case DW_CFA_restore_state
:
12882 return "DW_CFA_restore_state";
12883 case DW_CFA_def_cfa
:
12884 return "DW_CFA_def_cfa";
12885 case DW_CFA_def_cfa_register
:
12886 return "DW_CFA_def_cfa_register";
12887 case DW_CFA_def_cfa_offset
:
12888 return "DW_CFA_def_cfa_offset";
12890 case DW_CFA_def_cfa_expression
:
12891 return "DW_CFA_def_cfa_expression";
12892 case DW_CFA_expression
:
12893 return "DW_CFA_expression";
12894 case DW_CFA_offset_extended_sf
:
12895 return "DW_CFA_offset_extended_sf";
12896 case DW_CFA_def_cfa_sf
:
12897 return "DW_CFA_def_cfa_sf";
12898 case DW_CFA_def_cfa_offset_sf
:
12899 return "DW_CFA_def_cfa_offset_sf";
12900 case DW_CFA_val_offset
:
12901 return "DW_CFA_val_offset";
12902 case DW_CFA_val_offset_sf
:
12903 return "DW_CFA_val_offset_sf";
12904 case DW_CFA_val_expression
:
12905 return "DW_CFA_val_expression";
12906 /* SGI/MIPS specific. */
12907 case DW_CFA_MIPS_advance_loc8
:
12908 return "DW_CFA_MIPS_advance_loc8";
12909 /* GNU extensions. */
12910 case DW_CFA_GNU_window_save
:
12911 return "DW_CFA_GNU_window_save";
12912 case DW_CFA_GNU_args_size
:
12913 return "DW_CFA_GNU_args_size";
12914 case DW_CFA_GNU_negative_offset_extended
:
12915 return "DW_CFA_GNU_negative_offset_extended";
12917 return "DW_CFA_<unknown>";
12923 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
12927 print_spaces (indent
, f
);
12928 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
12929 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
12931 if (die
->parent
!= NULL
)
12933 print_spaces (indent
, f
);
12934 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
12935 die
->parent
->offset
);
12938 print_spaces (indent
, f
);
12939 fprintf_unfiltered (f
, " has children: %s\n",
12940 dwarf_bool_name (die
->child
!= NULL
));
12942 print_spaces (indent
, f
);
12943 fprintf_unfiltered (f
, " attributes:\n");
12945 for (i
= 0; i
< die
->num_attrs
; ++i
)
12947 print_spaces (indent
, f
);
12948 fprintf_unfiltered (f
, " %s (%s) ",
12949 dwarf_attr_name (die
->attrs
[i
].name
),
12950 dwarf_form_name (die
->attrs
[i
].form
));
12952 switch (die
->attrs
[i
].form
)
12954 case DW_FORM_ref_addr
:
12956 fprintf_unfiltered (f
, "address: ");
12957 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
12959 case DW_FORM_block2
:
12960 case DW_FORM_block4
:
12961 case DW_FORM_block
:
12962 case DW_FORM_block1
:
12963 fprintf_unfiltered (f
, "block: size %d",
12964 DW_BLOCK (&die
->attrs
[i
])->size
);
12966 case DW_FORM_exprloc
:
12967 fprintf_unfiltered (f
, "expression: size %u",
12968 DW_BLOCK (&die
->attrs
[i
])->size
);
12973 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
12974 (long) (DW_ADDR (&die
->attrs
[i
])));
12976 case DW_FORM_data1
:
12977 case DW_FORM_data2
:
12978 case DW_FORM_data4
:
12979 case DW_FORM_data8
:
12980 case DW_FORM_udata
:
12981 case DW_FORM_sdata
:
12982 fprintf_unfiltered (f
, "constant: %s",
12983 pulongest (DW_UNSND (&die
->attrs
[i
])));
12985 case DW_FORM_sec_offset
:
12986 fprintf_unfiltered (f
, "section offset: %s",
12987 pulongest (DW_UNSND (&die
->attrs
[i
])));
12990 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
12991 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
12992 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
12994 fprintf_unfiltered (f
, "signatured type, offset: unknown");
12996 case DW_FORM_string
:
12998 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
12999 DW_STRING (&die
->attrs
[i
])
13000 ? DW_STRING (&die
->attrs
[i
]) : "",
13001 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
13004 if (DW_UNSND (&die
->attrs
[i
]))
13005 fprintf_unfiltered (f
, "flag: TRUE");
13007 fprintf_unfiltered (f
, "flag: FALSE");
13009 case DW_FORM_flag_present
:
13010 fprintf_unfiltered (f
, "flag: TRUE");
13012 case DW_FORM_indirect
:
13013 /* The reader will have reduced the indirect form to
13014 the "base form" so this form should not occur. */
13015 fprintf_unfiltered (f
,
13016 "unexpected attribute form: DW_FORM_indirect");
13019 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
13020 die
->attrs
[i
].form
);
13023 fprintf_unfiltered (f
, "\n");
13028 dump_die_for_error (struct die_info
*die
)
13030 dump_die_shallow (gdb_stderr
, 0, die
);
13034 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
13036 int indent
= level
* 4;
13038 gdb_assert (die
!= NULL
);
13040 if (level
>= max_level
)
13043 dump_die_shallow (f
, indent
, die
);
13045 if (die
->child
!= NULL
)
13047 print_spaces (indent
, f
);
13048 fprintf_unfiltered (f
, " Children:");
13049 if (level
+ 1 < max_level
)
13051 fprintf_unfiltered (f
, "\n");
13052 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
13056 fprintf_unfiltered (f
,
13057 " [not printed, max nesting level reached]\n");
13061 if (die
->sibling
!= NULL
&& level
> 0)
13063 dump_die_1 (f
, level
, max_level
, die
->sibling
);
13067 /* This is called from the pdie macro in gdbinit.in.
13068 It's not static so gcc will keep a copy callable from gdb. */
13071 dump_die (struct die_info
*die
, int max_level
)
13073 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
13077 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
13081 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
13087 is_ref_attr (struct attribute
*attr
)
13089 switch (attr
->form
)
13091 case DW_FORM_ref_addr
:
13096 case DW_FORM_ref_udata
:
13103 static unsigned int
13104 dwarf2_get_ref_die_offset (struct attribute
*attr
)
13106 if (is_ref_attr (attr
))
13107 return DW_ADDR (attr
);
13109 complaint (&symfile_complaints
,
13110 _("unsupported die ref attribute form: '%s'"),
13111 dwarf_form_name (attr
->form
));
13115 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
13116 * the value held by the attribute is not constant. */
13119 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
13121 if (attr
->form
== DW_FORM_sdata
)
13122 return DW_SND (attr
);
13123 else if (attr
->form
== DW_FORM_udata
13124 || attr
->form
== DW_FORM_data1
13125 || attr
->form
== DW_FORM_data2
13126 || attr
->form
== DW_FORM_data4
13127 || attr
->form
== DW_FORM_data8
)
13128 return DW_UNSND (attr
);
13131 complaint (&symfile_complaints
,
13132 _("Attribute value is not a constant (%s)"),
13133 dwarf_form_name (attr
->form
));
13134 return default_value
;
13138 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
13139 unit and add it to our queue.
13140 The result is non-zero if PER_CU was queued, otherwise the result is zero
13141 meaning either PER_CU is already queued or it is already loaded. */
13144 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
13145 struct dwarf2_per_cu_data
*per_cu
)
13147 /* We may arrive here during partial symbol reading, if we need full
13148 DIEs to process an unusual case (e.g. template arguments). Do
13149 not queue PER_CU, just tell our caller to load its DIEs. */
13150 if (dwarf2_per_objfile
->reading_partial_symbols
)
13152 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
13157 /* Mark the dependence relation so that we don't flush PER_CU
13159 dwarf2_add_dependence (this_cu
, per_cu
);
13161 /* If it's already on the queue, we have nothing to do. */
13162 if (per_cu
->queued
)
13165 /* If the compilation unit is already loaded, just mark it as
13167 if (per_cu
->cu
!= NULL
)
13169 per_cu
->cu
->last_used
= 0;
13173 /* Add it to the queue. */
13174 queue_comp_unit (per_cu
, this_cu
->objfile
);
13179 /* Follow reference or signature attribute ATTR of SRC_DIE.
13180 On entry *REF_CU is the CU of SRC_DIE.
13181 On exit *REF_CU is the CU of the result. */
13183 static struct die_info
*
13184 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
13185 struct dwarf2_cu
**ref_cu
)
13187 struct die_info
*die
;
13189 if (is_ref_attr (attr
))
13190 die
= follow_die_ref (src_die
, attr
, ref_cu
);
13191 else if (attr
->form
== DW_FORM_sig8
)
13192 die
= follow_die_sig (src_die
, attr
, ref_cu
);
13195 dump_die_for_error (src_die
);
13196 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
13197 (*ref_cu
)->objfile
->name
);
13203 /* Follow reference OFFSET.
13204 On entry *REF_CU is the CU of the source die referencing OFFSET.
13205 On exit *REF_CU is the CU of the result.
13206 Returns NULL if OFFSET is invalid. */
13208 static struct die_info
*
13209 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
13211 struct die_info temp_die
;
13212 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
13214 gdb_assert (cu
->per_cu
!= NULL
);
13218 if (cu
->per_cu
->from_debug_types
)
13220 /* .debug_types CUs cannot reference anything outside their CU.
13221 If they need to, they have to reference a signatured type via
13223 if (! offset_in_cu_p (&cu
->header
, offset
))
13226 else if (! offset_in_cu_p (&cu
->header
, offset
))
13228 struct dwarf2_per_cu_data
*per_cu
;
13230 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
13232 /* If necessary, add it to the queue and load its DIEs. */
13233 if (maybe_queue_comp_unit (cu
, per_cu
))
13234 load_full_comp_unit (per_cu
, cu
->objfile
);
13236 target_cu
= per_cu
->cu
;
13238 else if (cu
->dies
== NULL
)
13240 /* We're loading full DIEs during partial symbol reading. */
13241 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
13242 load_full_comp_unit (cu
->per_cu
, cu
->objfile
);
13245 *ref_cu
= target_cu
;
13246 temp_die
.offset
= offset
;
13247 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
13250 /* Follow reference attribute ATTR of SRC_DIE.
13251 On entry *REF_CU is the CU of SRC_DIE.
13252 On exit *REF_CU is the CU of the result. */
13254 static struct die_info
*
13255 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
13256 struct dwarf2_cu
**ref_cu
)
13258 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
13259 struct dwarf2_cu
*cu
= *ref_cu
;
13260 struct die_info
*die
;
13262 die
= follow_die_offset (offset
, ref_cu
);
13264 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
13265 "at 0x%x [in module %s]"),
13266 offset
, src_die
->offset
, cu
->objfile
->name
);
13271 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
13272 value is intended for DW_OP_call*. */
13274 struct dwarf2_locexpr_baton
13275 dwarf2_fetch_die_location_block (unsigned int offset
,
13276 struct dwarf2_per_cu_data
*per_cu
,
13277 CORE_ADDR (*get_frame_pc
) (void *baton
),
13280 struct dwarf2_cu
*cu
= per_cu
->cu
;
13281 struct die_info
*die
;
13282 struct attribute
*attr
;
13283 struct dwarf2_locexpr_baton retval
;
13285 dw2_setup (per_cu
->objfile
);
13287 die
= follow_die_offset (offset
, &cu
);
13289 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
13290 offset
, per_cu
->cu
->objfile
->name
);
13292 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13295 /* DWARF: "If there is no such attribute, then there is no effect.". */
13297 retval
.data
= NULL
;
13300 else if (attr_form_is_section_offset (attr
))
13302 struct dwarf2_loclist_baton loclist_baton
;
13303 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
13306 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
13308 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
13310 retval
.size
= size
;
13314 if (!attr_form_is_block (attr
))
13315 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
13316 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
13317 offset
, per_cu
->cu
->objfile
->name
);
13319 retval
.data
= DW_BLOCK (attr
)->data
;
13320 retval
.size
= DW_BLOCK (attr
)->size
;
13322 retval
.per_cu
= cu
->per_cu
;
13326 /* Follow the signature attribute ATTR in SRC_DIE.
13327 On entry *REF_CU is the CU of SRC_DIE.
13328 On exit *REF_CU is the CU of the result. */
13330 static struct die_info
*
13331 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
13332 struct dwarf2_cu
**ref_cu
)
13334 struct objfile
*objfile
= (*ref_cu
)->objfile
;
13335 struct die_info temp_die
;
13336 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
13337 struct dwarf2_cu
*sig_cu
;
13338 struct die_info
*die
;
13340 /* sig_type will be NULL if the signatured type is missing from
13342 if (sig_type
== NULL
)
13343 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
13344 "at 0x%x [in module %s]"),
13345 src_die
->offset
, objfile
->name
);
13347 /* If necessary, add it to the queue and load its DIEs. */
13349 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
13350 read_signatured_type (objfile
, sig_type
);
13352 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
13354 sig_cu
= sig_type
->per_cu
.cu
;
13355 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
13356 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
13363 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
13364 "from DIE at 0x%x [in module %s]"),
13365 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
13368 /* Given an offset of a signatured type, return its signatured_type. */
13370 static struct signatured_type
*
13371 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
13373 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
13374 unsigned int length
, initial_length_size
;
13375 unsigned int sig_offset
;
13376 struct signatured_type find_entry
, *type_sig
;
13378 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
13379 sig_offset
= (initial_length_size
13381 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
13382 + 1 /*address_size*/);
13383 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
13384 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
13386 /* This is only used to lookup previously recorded types.
13387 If we didn't find it, it's our bug. */
13388 gdb_assert (type_sig
!= NULL
);
13389 gdb_assert (offset
== type_sig
->offset
);
13394 /* Read in signatured type at OFFSET and build its CU and die(s). */
13397 read_signatured_type_at_offset (struct objfile
*objfile
,
13398 unsigned int offset
)
13400 struct signatured_type
*type_sig
;
13402 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13404 /* We have the section offset, but we need the signature to do the
13405 hash table lookup. */
13406 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
13408 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13410 read_signatured_type (objfile
, type_sig
);
13412 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
13415 /* Read in a signatured type and build its CU and DIEs. */
13418 read_signatured_type (struct objfile
*objfile
,
13419 struct signatured_type
*type_sig
)
13421 gdb_byte
*types_ptr
;
13422 struct die_reader_specs reader_specs
;
13423 struct dwarf2_cu
*cu
;
13424 ULONGEST signature
;
13425 struct cleanup
*back_to
, *free_cu_cleanup
;
13427 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13428 types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
13430 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13432 cu
= xmalloc (sizeof (*cu
));
13433 init_one_comp_unit (cu
, objfile
);
13435 type_sig
->per_cu
.cu
= cu
;
13436 cu
->per_cu
= &type_sig
->per_cu
;
13438 /* If an error occurs while loading, release our storage. */
13439 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
13441 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
13442 types_ptr
, objfile
->obfd
);
13443 gdb_assert (signature
== type_sig
->signature
);
13446 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13450 &cu
->comp_unit_obstack
,
13451 hashtab_obstack_allocate
,
13452 dummy_obstack_deallocate
);
13454 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
13455 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
13457 init_cu_die_reader (&reader_specs
, cu
);
13459 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
13462 /* We try not to read any attributes in this function, because not
13463 all objfiles needed for references have been loaded yet, and symbol
13464 table processing isn't initialized. But we have to set the CU language,
13465 or we won't be able to build types correctly. */
13466 prepare_one_comp_unit (cu
, cu
->dies
);
13468 do_cleanups (back_to
);
13470 /* We've successfully allocated this compilation unit. Let our caller
13471 clean it up when finished with it. */
13472 discard_cleanups (free_cu_cleanup
);
13474 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
13475 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
13478 /* Decode simple location descriptions.
13479 Given a pointer to a dwarf block that defines a location, compute
13480 the location and return the value.
13482 NOTE drow/2003-11-18: This function is called in two situations
13483 now: for the address of static or global variables (partial symbols
13484 only) and for offsets into structures which are expected to be
13485 (more or less) constant. The partial symbol case should go away,
13486 and only the constant case should remain. That will let this
13487 function complain more accurately. A few special modes are allowed
13488 without complaint for global variables (for instance, global
13489 register values and thread-local values).
13491 A location description containing no operations indicates that the
13492 object is optimized out. The return value is 0 for that case.
13493 FIXME drow/2003-11-16: No callers check for this case any more; soon all
13494 callers will only want a very basic result and this can become a
13497 Note that stack[0] is unused except as a default error return. */
13500 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
13502 struct objfile
*objfile
= cu
->objfile
;
13504 int size
= blk
->size
;
13505 gdb_byte
*data
= blk
->data
;
13506 CORE_ADDR stack
[64];
13508 unsigned int bytes_read
, unsnd
;
13514 stack
[++stacki
] = 0;
13553 stack
[++stacki
] = op
- DW_OP_lit0
;
13588 stack
[++stacki
] = op
- DW_OP_reg0
;
13590 dwarf2_complex_location_expr_complaint ();
13594 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13596 stack
[++stacki
] = unsnd
;
13598 dwarf2_complex_location_expr_complaint ();
13602 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
13607 case DW_OP_const1u
:
13608 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
13612 case DW_OP_const1s
:
13613 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
13617 case DW_OP_const2u
:
13618 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
13622 case DW_OP_const2s
:
13623 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
13627 case DW_OP_const4u
:
13628 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
13632 case DW_OP_const4s
:
13633 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
13638 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
13644 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
13649 stack
[stacki
+ 1] = stack
[stacki
];
13654 stack
[stacki
- 1] += stack
[stacki
];
13658 case DW_OP_plus_uconst
:
13659 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
13665 stack
[stacki
- 1] -= stack
[stacki
];
13670 /* If we're not the last op, then we definitely can't encode
13671 this using GDB's address_class enum. This is valid for partial
13672 global symbols, although the variable's address will be bogus
13675 dwarf2_complex_location_expr_complaint ();
13678 case DW_OP_GNU_push_tls_address
:
13679 /* The top of the stack has the offset from the beginning
13680 of the thread control block at which the variable is located. */
13681 /* Nothing should follow this operator, so the top of stack would
13683 /* This is valid for partial global symbols, but the variable's
13684 address will be bogus in the psymtab. */
13686 dwarf2_complex_location_expr_complaint ();
13689 case DW_OP_GNU_uninit
:
13693 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
13694 dwarf_stack_op_name (op
, 1));
13695 return (stack
[stacki
]);
13698 /* Enforce maximum stack depth of SIZE-1 to avoid writing
13699 outside of the allocated space. Also enforce minimum>0. */
13700 if (stacki
>= ARRAY_SIZE (stack
) - 1)
13702 complaint (&symfile_complaints
,
13703 _("location description stack overflow"));
13709 complaint (&symfile_complaints
,
13710 _("location description stack underflow"));
13714 return (stack
[stacki
]);
13717 /* memory allocation interface */
13719 static struct dwarf_block
*
13720 dwarf_alloc_block (struct dwarf2_cu
*cu
)
13722 struct dwarf_block
*blk
;
13724 blk
= (struct dwarf_block
*)
13725 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
13729 static struct abbrev_info
*
13730 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
13732 struct abbrev_info
*abbrev
;
13734 abbrev
= (struct abbrev_info
*)
13735 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
13736 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13740 static struct die_info
*
13741 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
13743 struct die_info
*die
;
13744 size_t size
= sizeof (struct die_info
);
13747 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
13749 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
13750 memset (die
, 0, sizeof (struct die_info
));
13755 /* Macro support. */
13757 /* Return the full name of file number I in *LH's file name table.
13758 Use COMP_DIR as the name of the current directory of the
13759 compilation. The result is allocated using xmalloc; the caller is
13760 responsible for freeing it. */
13762 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
13764 /* Is the file number a valid index into the line header's file name
13765 table? Remember that file numbers start with one, not zero. */
13766 if (1 <= file
&& file
<= lh
->num_file_names
)
13768 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
13770 if (IS_ABSOLUTE_PATH (fe
->name
))
13771 return xstrdup (fe
->name
);
13779 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13785 dir_len
= strlen (dir
);
13786 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
13787 strcpy (full_name
, dir
);
13788 full_name
[dir_len
] = '/';
13789 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
13793 return xstrdup (fe
->name
);
13798 /* The compiler produced a bogus file number. We can at least
13799 record the macro definitions made in the file, even if we
13800 won't be able to find the file by name. */
13801 char fake_name
[80];
13803 sprintf (fake_name
, "<bad macro file number %d>", file
);
13805 complaint (&symfile_complaints
,
13806 _("bad file number in macro information (%d)"),
13809 return xstrdup (fake_name
);
13814 static struct macro_source_file
*
13815 macro_start_file (int file
, int line
,
13816 struct macro_source_file
*current_file
,
13817 const char *comp_dir
,
13818 struct line_header
*lh
, struct objfile
*objfile
)
13820 /* The full name of this source file. */
13821 char *full_name
= file_full_name (file
, lh
, comp_dir
);
13823 /* We don't create a macro table for this compilation unit
13824 at all until we actually get a filename. */
13825 if (! pending_macros
)
13826 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
13827 objfile
->macro_cache
);
13829 if (! current_file
)
13830 /* If we have no current file, then this must be the start_file
13831 directive for the compilation unit's main source file. */
13832 current_file
= macro_set_main (pending_macros
, full_name
);
13834 current_file
= macro_include (current_file
, line
, full_name
);
13838 return current_file
;
13842 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
13843 followed by a null byte. */
13845 copy_string (const char *buf
, int len
)
13847 char *s
= xmalloc (len
+ 1);
13849 memcpy (s
, buf
, len
);
13855 static const char *
13856 consume_improper_spaces (const char *p
, const char *body
)
13860 complaint (&symfile_complaints
,
13861 _("macro definition contains spaces "
13862 "in formal argument list:\n`%s'"),
13874 parse_macro_definition (struct macro_source_file
*file
, int line
,
13879 /* The body string takes one of two forms. For object-like macro
13880 definitions, it should be:
13882 <macro name> " " <definition>
13884 For function-like macro definitions, it should be:
13886 <macro name> "() " <definition>
13888 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
13890 Spaces may appear only where explicitly indicated, and in the
13893 The Dwarf 2 spec says that an object-like macro's name is always
13894 followed by a space, but versions of GCC around March 2002 omit
13895 the space when the macro's definition is the empty string.
13897 The Dwarf 2 spec says that there should be no spaces between the
13898 formal arguments in a function-like macro's formal argument list,
13899 but versions of GCC around March 2002 include spaces after the
13903 /* Find the extent of the macro name. The macro name is terminated
13904 by either a space or null character (for an object-like macro) or
13905 an opening paren (for a function-like macro). */
13906 for (p
= body
; *p
; p
++)
13907 if (*p
== ' ' || *p
== '(')
13910 if (*p
== ' ' || *p
== '\0')
13912 /* It's an object-like macro. */
13913 int name_len
= p
- body
;
13914 char *name
= copy_string (body
, name_len
);
13915 const char *replacement
;
13918 replacement
= body
+ name_len
+ 1;
13921 dwarf2_macro_malformed_definition_complaint (body
);
13922 replacement
= body
+ name_len
;
13925 macro_define_object (file
, line
, name
, replacement
);
13929 else if (*p
== '(')
13931 /* It's a function-like macro. */
13932 char *name
= copy_string (body
, p
- body
);
13935 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
13939 p
= consume_improper_spaces (p
, body
);
13941 /* Parse the formal argument list. */
13942 while (*p
&& *p
!= ')')
13944 /* Find the extent of the current argument name. */
13945 const char *arg_start
= p
;
13947 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
13950 if (! *p
|| p
== arg_start
)
13951 dwarf2_macro_malformed_definition_complaint (body
);
13954 /* Make sure argv has room for the new argument. */
13955 if (argc
>= argv_size
)
13958 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
13961 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
13964 p
= consume_improper_spaces (p
, body
);
13966 /* Consume the comma, if present. */
13971 p
= consume_improper_spaces (p
, body
);
13980 /* Perfectly formed definition, no complaints. */
13981 macro_define_function (file
, line
, name
,
13982 argc
, (const char **) argv
,
13984 else if (*p
== '\0')
13986 /* Complain, but do define it. */
13987 dwarf2_macro_malformed_definition_complaint (body
);
13988 macro_define_function (file
, line
, name
,
13989 argc
, (const char **) argv
,
13993 /* Just complain. */
13994 dwarf2_macro_malformed_definition_complaint (body
);
13997 /* Just complain. */
13998 dwarf2_macro_malformed_definition_complaint (body
);
14004 for (i
= 0; i
< argc
; i
++)
14010 dwarf2_macro_malformed_definition_complaint (body
);
14015 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
14016 char *comp_dir
, bfd
*abfd
,
14017 struct dwarf2_cu
*cu
)
14019 gdb_byte
*mac_ptr
, *mac_end
;
14020 struct macro_source_file
*current_file
= 0;
14021 enum dwarf_macinfo_record_type macinfo_type
;
14022 int at_commandline
;
14024 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
14025 &dwarf2_per_objfile
->macinfo
);
14026 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
14028 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
14032 /* First pass: Find the name of the base filename.
14033 This filename is needed in order to process all macros whose definition
14034 (or undefinition) comes from the command line. These macros are defined
14035 before the first DW_MACINFO_start_file entry, and yet still need to be
14036 associated to the base file.
14038 To determine the base file name, we scan the macro definitions until we
14039 reach the first DW_MACINFO_start_file entry. We then initialize
14040 CURRENT_FILE accordingly so that any macro definition found before the
14041 first DW_MACINFO_start_file can still be associated to the base file. */
14043 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
14044 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
14045 + dwarf2_per_objfile
->macinfo
.size
;
14049 /* Do we at least have room for a macinfo type byte? */
14050 if (mac_ptr
>= mac_end
)
14052 /* Complaint is printed during the second pass as GDB will probably
14053 stop the first pass earlier upon finding
14054 DW_MACINFO_start_file. */
14058 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
14061 switch (macinfo_type
)
14063 /* A zero macinfo type indicates the end of the macro
14068 case DW_MACINFO_define
:
14069 case DW_MACINFO_undef
:
14070 /* Only skip the data by MAC_PTR. */
14072 unsigned int bytes_read
;
14074 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14075 mac_ptr
+= bytes_read
;
14076 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14077 mac_ptr
+= bytes_read
;
14081 case DW_MACINFO_start_file
:
14083 unsigned int bytes_read
;
14086 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14087 mac_ptr
+= bytes_read
;
14088 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14089 mac_ptr
+= bytes_read
;
14091 current_file
= macro_start_file (file
, line
, current_file
,
14092 comp_dir
, lh
, cu
->objfile
);
14096 case DW_MACINFO_end_file
:
14097 /* No data to skip by MAC_PTR. */
14100 case DW_MACINFO_vendor_ext
:
14101 /* Only skip the data by MAC_PTR. */
14103 unsigned int bytes_read
;
14105 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14106 mac_ptr
+= bytes_read
;
14107 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14108 mac_ptr
+= bytes_read
;
14115 } while (macinfo_type
!= 0 && current_file
== NULL
);
14117 /* Second pass: Process all entries.
14119 Use the AT_COMMAND_LINE flag to determine whether we are still processing
14120 command-line macro definitions/undefinitions. This flag is unset when we
14121 reach the first DW_MACINFO_start_file entry. */
14123 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
14125 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
14126 GDB is still reading the definitions from command line. First
14127 DW_MACINFO_start_file will need to be ignored as it was already executed
14128 to create CURRENT_FILE for the main source holding also the command line
14129 definitions. On first met DW_MACINFO_start_file this flag is reset to
14130 normally execute all the remaining DW_MACINFO_start_file macinfos. */
14132 at_commandline
= 1;
14136 /* Do we at least have room for a macinfo type byte? */
14137 if (mac_ptr
>= mac_end
)
14139 dwarf2_macros_too_long_complaint ();
14143 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
14146 switch (macinfo_type
)
14148 /* A zero macinfo type indicates the end of the macro
14153 case DW_MACINFO_define
:
14154 case DW_MACINFO_undef
:
14156 unsigned int bytes_read
;
14160 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14161 mac_ptr
+= bytes_read
;
14162 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14163 mac_ptr
+= bytes_read
;
14165 if (! current_file
)
14167 /* DWARF violation as no main source is present. */
14168 complaint (&symfile_complaints
,
14169 _("debug info with no main source gives macro %s "
14171 macinfo_type
== DW_MACINFO_define
?
14173 macinfo_type
== DW_MACINFO_undef
?
14174 _("undefinition") :
14175 _("something-or-other"), line
, body
);
14178 if ((line
== 0 && !at_commandline
)
14179 || (line
!= 0 && at_commandline
))
14180 complaint (&symfile_complaints
,
14181 _("debug info gives %s macro %s with %s line %d: %s"),
14182 at_commandline
? _("command-line") : _("in-file"),
14183 macinfo_type
== DW_MACINFO_define
?
14185 macinfo_type
== DW_MACINFO_undef
?
14186 _("undefinition") :
14187 _("something-or-other"),
14188 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
14190 if (macinfo_type
== DW_MACINFO_define
)
14191 parse_macro_definition (current_file
, line
, body
);
14192 else if (macinfo_type
== DW_MACINFO_undef
)
14193 macro_undef (current_file
, line
, body
);
14197 case DW_MACINFO_start_file
:
14199 unsigned int bytes_read
;
14202 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14203 mac_ptr
+= bytes_read
;
14204 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14205 mac_ptr
+= bytes_read
;
14207 if ((line
== 0 && !at_commandline
)
14208 || (line
!= 0 && at_commandline
))
14209 complaint (&symfile_complaints
,
14210 _("debug info gives source %d included "
14211 "from %s at %s line %d"),
14212 file
, at_commandline
? _("command-line") : _("file"),
14213 line
== 0 ? _("zero") : _("non-zero"), line
);
14215 if (at_commandline
)
14217 /* This DW_MACINFO_start_file was executed in the pass one. */
14218 at_commandline
= 0;
14221 current_file
= macro_start_file (file
, line
,
14222 current_file
, comp_dir
,
14227 case DW_MACINFO_end_file
:
14228 if (! current_file
)
14229 complaint (&symfile_complaints
,
14230 _("macro debug info has an unmatched "
14231 "`close_file' directive"));
14234 current_file
= current_file
->included_by
;
14235 if (! current_file
)
14237 enum dwarf_macinfo_record_type next_type
;
14239 /* GCC circa March 2002 doesn't produce the zero
14240 type byte marking the end of the compilation
14241 unit. Complain if it's not there, but exit no
14244 /* Do we at least have room for a macinfo type byte? */
14245 if (mac_ptr
>= mac_end
)
14247 dwarf2_macros_too_long_complaint ();
14251 /* We don't increment mac_ptr here, so this is just
14253 next_type
= read_1_byte (abfd
, mac_ptr
);
14254 if (next_type
!= 0)
14255 complaint (&symfile_complaints
,
14256 _("no terminating 0-type entry for "
14257 "macros in `.debug_macinfo' section"));
14264 case DW_MACINFO_vendor_ext
:
14266 unsigned int bytes_read
;
14270 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14271 mac_ptr
+= bytes_read
;
14272 string
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14273 mac_ptr
+= bytes_read
;
14275 /* We don't recognize any vendor extensions. */
14279 } while (macinfo_type
!= 0);
14282 /* Check if the attribute's form is a DW_FORM_block*
14283 if so return true else false. */
14285 attr_form_is_block (struct attribute
*attr
)
14287 return (attr
== NULL
? 0 :
14288 attr
->form
== DW_FORM_block1
14289 || attr
->form
== DW_FORM_block2
14290 || attr
->form
== DW_FORM_block4
14291 || attr
->form
== DW_FORM_block
14292 || attr
->form
== DW_FORM_exprloc
);
14295 /* Return non-zero if ATTR's value is a section offset --- classes
14296 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
14297 You may use DW_UNSND (attr) to retrieve such offsets.
14299 Section 7.5.4, "Attribute Encodings", explains that no attribute
14300 may have a value that belongs to more than one of these classes; it
14301 would be ambiguous if we did, because we use the same forms for all
14304 attr_form_is_section_offset (struct attribute
*attr
)
14306 return (attr
->form
== DW_FORM_data4
14307 || attr
->form
== DW_FORM_data8
14308 || attr
->form
== DW_FORM_sec_offset
);
14312 /* Return non-zero if ATTR's value falls in the 'constant' class, or
14313 zero otherwise. When this function returns true, you can apply
14314 dwarf2_get_attr_constant_value to it.
14316 However, note that for some attributes you must check
14317 attr_form_is_section_offset before using this test. DW_FORM_data4
14318 and DW_FORM_data8 are members of both the constant class, and of
14319 the classes that contain offsets into other debug sections
14320 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
14321 that, if an attribute's can be either a constant or one of the
14322 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
14323 taken as section offsets, not constants. */
14325 attr_form_is_constant (struct attribute
*attr
)
14327 switch (attr
->form
)
14329 case DW_FORM_sdata
:
14330 case DW_FORM_udata
:
14331 case DW_FORM_data1
:
14332 case DW_FORM_data2
:
14333 case DW_FORM_data4
:
14334 case DW_FORM_data8
:
14341 /* A helper function that fills in a dwarf2_loclist_baton. */
14344 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
14345 struct dwarf2_loclist_baton
*baton
,
14346 struct attribute
*attr
)
14348 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
14349 &dwarf2_per_objfile
->loc
);
14351 baton
->per_cu
= cu
->per_cu
;
14352 gdb_assert (baton
->per_cu
);
14353 /* We don't know how long the location list is, but make sure we
14354 don't run off the edge of the section. */
14355 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
14356 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
14357 baton
->base_address
= cu
->base_address
;
14361 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
14362 struct dwarf2_cu
*cu
)
14364 if (attr_form_is_section_offset (attr
)
14365 /* ".debug_loc" may not exist at all, or the offset may be outside
14366 the section. If so, fall through to the complaint in the
14368 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
14370 struct dwarf2_loclist_baton
*baton
;
14372 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
14373 sizeof (struct dwarf2_loclist_baton
));
14375 fill_in_loclist_baton (cu
, baton
, attr
);
14377 if (cu
->base_known
== 0)
14378 complaint (&symfile_complaints
,
14379 _("Location list used without "
14380 "specifying the CU base address."));
14382 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
14383 SYMBOL_LOCATION_BATON (sym
) = baton
;
14387 struct dwarf2_locexpr_baton
*baton
;
14389 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
14390 sizeof (struct dwarf2_locexpr_baton
));
14391 baton
->per_cu
= cu
->per_cu
;
14392 gdb_assert (baton
->per_cu
);
14394 if (attr_form_is_block (attr
))
14396 /* Note that we're just copying the block's data pointer
14397 here, not the actual data. We're still pointing into the
14398 info_buffer for SYM's objfile; right now we never release
14399 that buffer, but when we do clean up properly this may
14401 baton
->size
= DW_BLOCK (attr
)->size
;
14402 baton
->data
= DW_BLOCK (attr
)->data
;
14406 dwarf2_invalid_attrib_class_complaint ("location description",
14407 SYMBOL_NATURAL_NAME (sym
));
14409 baton
->data
= NULL
;
14412 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
14413 SYMBOL_LOCATION_BATON (sym
) = baton
;
14417 /* Return the OBJFILE associated with the compilation unit CU. If CU
14418 came from a separate debuginfo file, then the master objfile is
14422 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
14424 struct objfile
*objfile
= per_cu
->objfile
;
14426 /* Return the master objfile, so that we can report and look up the
14427 correct file containing this variable. */
14428 if (objfile
->separate_debug_objfile_backlink
)
14429 objfile
= objfile
->separate_debug_objfile_backlink
;
14434 /* Return the address size given in the compilation unit header for CU. */
14437 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
14440 return per_cu
->cu
->header
.addr_size
;
14443 /* If the CU is not currently read in, we re-read its header. */
14444 struct objfile
*objfile
= per_cu
->objfile
;
14445 struct dwarf2_per_objfile
*per_objfile
14446 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14447 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14448 struct comp_unit_head cu_header
;
14450 memset (&cu_header
, 0, sizeof cu_header
);
14451 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14452 return cu_header
.addr_size
;
14456 /* Return the offset size given in the compilation unit header for CU. */
14459 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
14462 return per_cu
->cu
->header
.offset_size
;
14465 /* If the CU is not currently read in, we re-read its header. */
14466 struct objfile
*objfile
= per_cu
->objfile
;
14467 struct dwarf2_per_objfile
*per_objfile
14468 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14469 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14470 struct comp_unit_head cu_header
;
14472 memset (&cu_header
, 0, sizeof cu_header
);
14473 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14474 return cu_header
.offset_size
;
14478 /* Return the text offset of the CU. The returned offset comes from
14479 this CU's objfile. If this objfile came from a separate debuginfo
14480 file, then the offset may be different from the corresponding
14481 offset in the parent objfile. */
14484 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
14486 struct objfile
*objfile
= per_cu
->objfile
;
14488 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14491 /* Locate the .debug_info compilation unit from CU's objfile which contains
14492 the DIE at OFFSET. Raises an error on failure. */
14494 static struct dwarf2_per_cu_data
*
14495 dwarf2_find_containing_comp_unit (unsigned int offset
,
14496 struct objfile
*objfile
)
14498 struct dwarf2_per_cu_data
*this_cu
;
14502 high
= dwarf2_per_objfile
->n_comp_units
- 1;
14505 int mid
= low
+ (high
- low
) / 2;
14507 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
14512 gdb_assert (low
== high
);
14513 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
14516 error (_("Dwarf Error: could not find partial DIE containing "
14517 "offset 0x%lx [in module %s]"),
14518 (long) offset
, bfd_get_filename (objfile
->obfd
));
14520 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
14521 return dwarf2_per_objfile
->all_comp_units
[low
-1];
14525 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
14526 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
14527 && offset
>= this_cu
->offset
+ this_cu
->length
)
14528 error (_("invalid dwarf2 offset %u"), offset
);
14529 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
14534 /* Locate the compilation unit from OBJFILE which is located at exactly
14535 OFFSET. Raises an error on failure. */
14537 static struct dwarf2_per_cu_data
*
14538 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
14540 struct dwarf2_per_cu_data
*this_cu
;
14542 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
14543 if (this_cu
->offset
!= offset
)
14544 error (_("no compilation unit with offset %u."), offset
);
14548 /* Initialize dwarf2_cu CU for OBJFILE in a pre-allocated space. */
14551 init_one_comp_unit (struct dwarf2_cu
*cu
, struct objfile
*objfile
)
14553 memset (cu
, 0, sizeof (*cu
));
14554 cu
->objfile
= objfile
;
14555 obstack_init (&cu
->comp_unit_obstack
);
14558 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
14561 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
)
14563 struct attribute
*attr
;
14565 /* Set the language we're debugging. */
14566 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
14568 set_cu_language (DW_UNSND (attr
), cu
);
14570 set_cu_language (language_minimal
, cu
);
14573 /* Release one cached compilation unit, CU. We unlink it from the tree
14574 of compilation units, but we don't remove it from the read_in_chain;
14575 the caller is responsible for that.
14576 NOTE: DATA is a void * because this function is also used as a
14577 cleanup routine. */
14580 free_one_comp_unit (void *data
)
14582 struct dwarf2_cu
*cu
= data
;
14584 if (cu
->per_cu
!= NULL
)
14585 cu
->per_cu
->cu
= NULL
;
14588 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14593 /* This cleanup function is passed the address of a dwarf2_cu on the stack
14594 when we're finished with it. We can't free the pointer itself, but be
14595 sure to unlink it from the cache. Also release any associated storage
14596 and perform cache maintenance.
14598 Only used during partial symbol parsing. */
14601 free_stack_comp_unit (void *data
)
14603 struct dwarf2_cu
*cu
= data
;
14605 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14606 cu
->partial_dies
= NULL
;
14608 if (cu
->per_cu
!= NULL
)
14610 /* This compilation unit is on the stack in our caller, so we
14611 should not xfree it. Just unlink it. */
14612 cu
->per_cu
->cu
= NULL
;
14615 /* If we had a per-cu pointer, then we may have other compilation
14616 units loaded, so age them now. */
14617 age_cached_comp_units ();
14621 /* Free all cached compilation units. */
14624 free_cached_comp_units (void *data
)
14626 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14628 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14629 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14630 while (per_cu
!= NULL
)
14632 struct dwarf2_per_cu_data
*next_cu
;
14634 next_cu
= per_cu
->cu
->read_in_chain
;
14636 free_one_comp_unit (per_cu
->cu
);
14637 *last_chain
= next_cu
;
14643 /* Increase the age counter on each cached compilation unit, and free
14644 any that are too old. */
14647 age_cached_comp_units (void)
14649 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14651 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
14652 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14653 while (per_cu
!= NULL
)
14655 per_cu
->cu
->last_used
++;
14656 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
14657 dwarf2_mark (per_cu
->cu
);
14658 per_cu
= per_cu
->cu
->read_in_chain
;
14661 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14662 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14663 while (per_cu
!= NULL
)
14665 struct dwarf2_per_cu_data
*next_cu
;
14667 next_cu
= per_cu
->cu
->read_in_chain
;
14669 if (!per_cu
->cu
->mark
)
14671 free_one_comp_unit (per_cu
->cu
);
14672 *last_chain
= next_cu
;
14675 last_chain
= &per_cu
->cu
->read_in_chain
;
14681 /* Remove a single compilation unit from the cache. */
14684 free_one_cached_comp_unit (void *target_cu
)
14686 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14688 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14689 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14690 while (per_cu
!= NULL
)
14692 struct dwarf2_per_cu_data
*next_cu
;
14694 next_cu
= per_cu
->cu
->read_in_chain
;
14696 if (per_cu
->cu
== target_cu
)
14698 free_one_comp_unit (per_cu
->cu
);
14699 *last_chain
= next_cu
;
14703 last_chain
= &per_cu
->cu
->read_in_chain
;
14709 /* Release all extra memory associated with OBJFILE. */
14712 dwarf2_free_objfile (struct objfile
*objfile
)
14714 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
14716 if (dwarf2_per_objfile
== NULL
)
14719 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
14720 free_cached_comp_units (NULL
);
14722 if (dwarf2_per_objfile
->quick_file_names_table
)
14723 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
14725 /* Everything else should be on the objfile obstack. */
14728 /* A pair of DIE offset and GDB type pointer. We store these
14729 in a hash table separate from the DIEs, and preserve them
14730 when the DIEs are flushed out of cache. */
14732 struct dwarf2_offset_and_type
14734 unsigned int offset
;
14738 /* Hash function for a dwarf2_offset_and_type. */
14741 offset_and_type_hash (const void *item
)
14743 const struct dwarf2_offset_and_type
*ofs
= item
;
14745 return ofs
->offset
;
14748 /* Equality function for a dwarf2_offset_and_type. */
14751 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
14753 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
14754 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
14756 return ofs_lhs
->offset
== ofs_rhs
->offset
;
14759 /* Set the type associated with DIE to TYPE. Save it in CU's hash
14760 table if necessary. For convenience, return TYPE.
14762 The DIEs reading must have careful ordering to:
14763 * Not cause infite loops trying to read in DIEs as a prerequisite for
14764 reading current DIE.
14765 * Not trying to dereference contents of still incompletely read in types
14766 while reading in other DIEs.
14767 * Enable referencing still incompletely read in types just by a pointer to
14768 the type without accessing its fields.
14770 Therefore caller should follow these rules:
14771 * Try to fetch any prerequisite types we may need to build this DIE type
14772 before building the type and calling set_die_type.
14773 * After building type call set_die_type for current DIE as soon as
14774 possible before fetching more types to complete the current type.
14775 * Make the type as complete as possible before fetching more types. */
14777 static struct type
*
14778 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
14780 struct dwarf2_offset_and_type
**slot
, ofs
;
14781 struct objfile
*objfile
= cu
->objfile
;
14782 htab_t
*type_hash_ptr
;
14784 /* For Ada types, make sure that the gnat-specific data is always
14785 initialized (if not already set). There are a few types where
14786 we should not be doing so, because the type-specific area is
14787 already used to hold some other piece of info (eg: TYPE_CODE_FLT
14788 where the type-specific area is used to store the floatformat).
14789 But this is not a problem, because the gnat-specific information
14790 is actually not needed for these types. */
14791 if (need_gnat_info (cu
)
14792 && TYPE_CODE (type
) != TYPE_CODE_FUNC
14793 && TYPE_CODE (type
) != TYPE_CODE_FLT
14794 && !HAVE_GNAT_AUX_INFO (type
))
14795 INIT_GNAT_SPECIFIC (type
);
14797 if (cu
->per_cu
->from_debug_types
)
14798 type_hash_ptr
= &dwarf2_per_objfile
->debug_types_type_hash
;
14800 type_hash_ptr
= &dwarf2_per_objfile
->debug_info_type_hash
;
14802 if (*type_hash_ptr
== NULL
)
14805 = htab_create_alloc_ex (127,
14806 offset_and_type_hash
,
14807 offset_and_type_eq
,
14809 &objfile
->objfile_obstack
,
14810 hashtab_obstack_allocate
,
14811 dummy_obstack_deallocate
);
14814 ofs
.offset
= die
->offset
;
14816 slot
= (struct dwarf2_offset_and_type
**)
14817 htab_find_slot_with_hash (*type_hash_ptr
, &ofs
, ofs
.offset
, INSERT
);
14819 complaint (&symfile_complaints
,
14820 _("A problem internal to GDB: DIE 0x%x has type already set"),
14822 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
14827 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
14828 table, or return NULL if the die does not have a saved type. */
14830 static struct type
*
14831 get_die_type_at_offset (unsigned int offset
,
14832 struct dwarf2_per_cu_data
*per_cu
)
14834 struct dwarf2_offset_and_type
*slot
, ofs
;
14837 if (per_cu
->from_debug_types
)
14838 type_hash
= dwarf2_per_objfile
->debug_types_type_hash
;
14840 type_hash
= dwarf2_per_objfile
->debug_info_type_hash
;
14841 if (type_hash
== NULL
)
14844 ofs
.offset
= offset
;
14845 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
14852 /* Look up the type for DIE in the appropriate type_hash table,
14853 or return NULL if DIE does not have a saved type. */
14855 static struct type
*
14856 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14858 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
14861 /* Add a dependence relationship from CU to REF_PER_CU. */
14864 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
14865 struct dwarf2_per_cu_data
*ref_per_cu
)
14869 if (cu
->dependencies
== NULL
)
14871 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
14872 NULL
, &cu
->comp_unit_obstack
,
14873 hashtab_obstack_allocate
,
14874 dummy_obstack_deallocate
);
14876 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
14878 *slot
= ref_per_cu
;
14881 /* Subroutine of dwarf2_mark to pass to htab_traverse.
14882 Set the mark field in every compilation unit in the
14883 cache that we must keep because we are keeping CU. */
14886 dwarf2_mark_helper (void **slot
, void *data
)
14888 struct dwarf2_per_cu_data
*per_cu
;
14890 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
14891 if (per_cu
->cu
->mark
)
14893 per_cu
->cu
->mark
= 1;
14895 if (per_cu
->cu
->dependencies
!= NULL
)
14896 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14901 /* Set the mark field in CU and in every other compilation unit in the
14902 cache that we must keep because we are keeping CU. */
14905 dwarf2_mark (struct dwarf2_cu
*cu
)
14910 if (cu
->dependencies
!= NULL
)
14911 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14915 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
14919 per_cu
->cu
->mark
= 0;
14920 per_cu
= per_cu
->cu
->read_in_chain
;
14924 /* Trivial hash function for partial_die_info: the hash value of a DIE
14925 is its offset in .debug_info for this objfile. */
14928 partial_die_hash (const void *item
)
14930 const struct partial_die_info
*part_die
= item
;
14932 return part_die
->offset
;
14935 /* Trivial comparison function for partial_die_info structures: two DIEs
14936 are equal if they have the same offset. */
14939 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
14941 const struct partial_die_info
*part_die_lhs
= item_lhs
;
14942 const struct partial_die_info
*part_die_rhs
= item_rhs
;
14944 return part_die_lhs
->offset
== part_die_rhs
->offset
;
14947 static struct cmd_list_element
*set_dwarf2_cmdlist
;
14948 static struct cmd_list_element
*show_dwarf2_cmdlist
;
14951 set_dwarf2_cmd (char *args
, int from_tty
)
14953 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
14957 show_dwarf2_cmd (char *args
, int from_tty
)
14959 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
14962 /* If section described by INFO was mmapped, munmap it now. */
14965 munmap_section_buffer (struct dwarf2_section_info
*info
)
14967 if (info
->was_mmapped
)
14970 intptr_t begin
= (intptr_t) info
->buffer
;
14971 intptr_t map_begin
= begin
& ~(pagesize
- 1);
14972 size_t map_length
= info
->size
+ begin
- map_begin
;
14974 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
14976 /* Without HAVE_MMAP, we should never be here to begin with. */
14977 gdb_assert_not_reached ("no mmap support");
14982 /* munmap debug sections for OBJFILE, if necessary. */
14985 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
14987 struct dwarf2_per_objfile
*data
= d
;
14989 /* This is sorted according to the order they're defined in to make it easier
14990 to keep in sync. */
14991 munmap_section_buffer (&data
->info
);
14992 munmap_section_buffer (&data
->abbrev
);
14993 munmap_section_buffer (&data
->line
);
14994 munmap_section_buffer (&data
->loc
);
14995 munmap_section_buffer (&data
->macinfo
);
14996 munmap_section_buffer (&data
->str
);
14997 munmap_section_buffer (&data
->ranges
);
14998 munmap_section_buffer (&data
->types
);
14999 munmap_section_buffer (&data
->frame
);
15000 munmap_section_buffer (&data
->eh_frame
);
15001 munmap_section_buffer (&data
->gdb_index
);
15005 /* The "save gdb-index" command. */
15007 /* The contents of the hash table we create when building the string
15009 struct strtab_entry
15011 offset_type offset
;
15015 /* Hash function for a strtab_entry. */
15018 hash_strtab_entry (const void *e
)
15020 const struct strtab_entry
*entry
= e
;
15021 return mapped_index_string_hash (entry
->str
);
15024 /* Equality function for a strtab_entry. */
15027 eq_strtab_entry (const void *a
, const void *b
)
15029 const struct strtab_entry
*ea
= a
;
15030 const struct strtab_entry
*eb
= b
;
15031 return !strcmp (ea
->str
, eb
->str
);
15034 /* Create a strtab_entry hash table. */
15037 create_strtab (void)
15039 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
15040 xfree
, xcalloc
, xfree
);
15043 /* Add a string to the constant pool. Return the string's offset in
15047 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
15050 struct strtab_entry entry
;
15051 struct strtab_entry
*result
;
15054 slot
= htab_find_slot (table
, &entry
, INSERT
);
15059 result
= XNEW (struct strtab_entry
);
15060 result
->offset
= obstack_object_size (cpool
);
15062 obstack_grow_str0 (cpool
, str
);
15065 return result
->offset
;
15068 /* An entry in the symbol table. */
15069 struct symtab_index_entry
15071 /* The name of the symbol. */
15073 /* The offset of the name in the constant pool. */
15074 offset_type index_offset
;
15075 /* A sorted vector of the indices of all the CUs that hold an object
15077 VEC (offset_type
) *cu_indices
;
15080 /* The symbol table. This is a power-of-2-sized hash table. */
15081 struct mapped_symtab
15083 offset_type n_elements
;
15085 struct symtab_index_entry
**data
;
15088 /* Hash function for a symtab_index_entry. */
15091 hash_symtab_entry (const void *e
)
15093 const struct symtab_index_entry
*entry
= e
;
15094 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
15095 sizeof (offset_type
) * VEC_length (offset_type
,
15096 entry
->cu_indices
),
15100 /* Equality function for a symtab_index_entry. */
15103 eq_symtab_entry (const void *a
, const void *b
)
15105 const struct symtab_index_entry
*ea
= a
;
15106 const struct symtab_index_entry
*eb
= b
;
15107 int len
= VEC_length (offset_type
, ea
->cu_indices
);
15108 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
15110 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
15111 VEC_address (offset_type
, eb
->cu_indices
),
15112 sizeof (offset_type
) * len
);
15115 /* Destroy a symtab_index_entry. */
15118 delete_symtab_entry (void *p
)
15120 struct symtab_index_entry
*entry
= p
;
15121 VEC_free (offset_type
, entry
->cu_indices
);
15125 /* Create a hash table holding symtab_index_entry objects. */
15128 create_symbol_hash_table (void)
15130 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
15131 delete_symtab_entry
, xcalloc
, xfree
);
15134 /* Create a new mapped symtab object. */
15136 static struct mapped_symtab
*
15137 create_mapped_symtab (void)
15139 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
15140 symtab
->n_elements
= 0;
15141 symtab
->size
= 1024;
15142 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
15146 /* Destroy a mapped_symtab. */
15149 cleanup_mapped_symtab (void *p
)
15151 struct mapped_symtab
*symtab
= p
;
15152 /* The contents of the array are freed when the other hash table is
15154 xfree (symtab
->data
);
15158 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
15161 static struct symtab_index_entry
**
15162 find_slot (struct mapped_symtab
*symtab
, const char *name
)
15164 offset_type index
, step
, hash
= mapped_index_string_hash (name
);
15166 index
= hash
& (symtab
->size
- 1);
15167 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
15171 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
15172 return &symtab
->data
[index
];
15173 index
= (index
+ step
) & (symtab
->size
- 1);
15177 /* Expand SYMTAB's hash table. */
15180 hash_expand (struct mapped_symtab
*symtab
)
15182 offset_type old_size
= symtab
->size
;
15184 struct symtab_index_entry
**old_entries
= symtab
->data
;
15187 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
15189 for (i
= 0; i
< old_size
; ++i
)
15191 if (old_entries
[i
])
15193 struct symtab_index_entry
**slot
= find_slot (symtab
,
15194 old_entries
[i
]->name
);
15195 *slot
= old_entries
[i
];
15199 xfree (old_entries
);
15202 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
15203 is the index of the CU in which the symbol appears. */
15206 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
15207 offset_type cu_index
)
15209 struct symtab_index_entry
**slot
;
15211 ++symtab
->n_elements
;
15212 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
15213 hash_expand (symtab
);
15215 slot
= find_slot (symtab
, name
);
15218 *slot
= XNEW (struct symtab_index_entry
);
15219 (*slot
)->name
= name
;
15220 (*slot
)->cu_indices
= NULL
;
15222 /* Don't push an index twice. Due to how we add entries we only
15223 have to check the last one. */
15224 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
15225 || VEC_length (offset_type
, (*slot
)->cu_indices
) != cu_index
)
15226 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
15229 /* Add a vector of indices to the constant pool. */
15232 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
15233 struct symtab_index_entry
*entry
)
15237 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
15240 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
15241 offset_type val
= MAYBE_SWAP (len
);
15246 entry
->index_offset
= obstack_object_size (cpool
);
15248 obstack_grow (cpool
, &val
, sizeof (val
));
15250 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
15253 val
= MAYBE_SWAP (iter
);
15254 obstack_grow (cpool
, &val
, sizeof (val
));
15259 struct symtab_index_entry
*old_entry
= *slot
;
15260 entry
->index_offset
= old_entry
->index_offset
;
15263 return entry
->index_offset
;
15266 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
15267 constant pool entries going into the obstack CPOOL. */
15270 write_hash_table (struct mapped_symtab
*symtab
,
15271 struct obstack
*output
, struct obstack
*cpool
)
15274 htab_t symbol_hash_table
;
15277 symbol_hash_table
= create_symbol_hash_table ();
15278 str_table
= create_strtab ();
15280 /* We add all the index vectors to the constant pool first, to
15281 ensure alignment is ok. */
15282 for (i
= 0; i
< symtab
->size
; ++i
)
15284 if (symtab
->data
[i
])
15285 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
15288 /* Now write out the hash table. */
15289 for (i
= 0; i
< symtab
->size
; ++i
)
15291 offset_type str_off
, vec_off
;
15293 if (symtab
->data
[i
])
15295 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
15296 vec_off
= symtab
->data
[i
]->index_offset
;
15300 /* While 0 is a valid constant pool index, it is not valid
15301 to have 0 for both offsets. */
15306 str_off
= MAYBE_SWAP (str_off
);
15307 vec_off
= MAYBE_SWAP (vec_off
);
15309 obstack_grow (output
, &str_off
, sizeof (str_off
));
15310 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
15313 htab_delete (str_table
);
15314 htab_delete (symbol_hash_table
);
15317 /* Struct to map psymtab to CU index in the index file. */
15318 struct psymtab_cu_index_map
15320 struct partial_symtab
*psymtab
;
15321 unsigned int cu_index
;
15325 hash_psymtab_cu_index (const void *item
)
15327 const struct psymtab_cu_index_map
*map
= item
;
15329 return htab_hash_pointer (map
->psymtab
);
15333 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
15335 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
15336 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
15338 return lhs
->psymtab
== rhs
->psymtab
;
15341 /* Helper struct for building the address table. */
15342 struct addrmap_index_data
15344 struct objfile
*objfile
;
15345 struct obstack
*addr_obstack
;
15346 htab_t cu_index_htab
;
15348 /* Non-zero if the previous_* fields are valid.
15349 We can't write an entry until we see the next entry (since it is only then
15350 that we know the end of the entry). */
15351 int previous_valid
;
15352 /* Index of the CU in the table of all CUs in the index file. */
15353 unsigned int previous_cu_index
;
15354 /* Start address of the CU. */
15355 CORE_ADDR previous_cu_start
;
15358 /* Write an address entry to OBSTACK. */
15361 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
15362 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
15364 offset_type cu_index_to_write
;
15366 CORE_ADDR baseaddr
;
15368 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15370 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
15371 obstack_grow (obstack
, addr
, 8);
15372 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
15373 obstack_grow (obstack
, addr
, 8);
15374 cu_index_to_write
= MAYBE_SWAP (cu_index
);
15375 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
15378 /* Worker function for traversing an addrmap to build the address table. */
15381 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
15383 struct addrmap_index_data
*data
= datap
;
15384 struct partial_symtab
*pst
= obj
;
15385 offset_type cu_index
;
15388 if (data
->previous_valid
)
15389 add_address_entry (data
->objfile
, data
->addr_obstack
,
15390 data
->previous_cu_start
, start_addr
,
15391 data
->previous_cu_index
);
15393 data
->previous_cu_start
= start_addr
;
15396 struct psymtab_cu_index_map find_map
, *map
;
15397 find_map
.psymtab
= pst
;
15398 map
= htab_find (data
->cu_index_htab
, &find_map
);
15399 gdb_assert (map
!= NULL
);
15400 data
->previous_cu_index
= map
->cu_index
;
15401 data
->previous_valid
= 1;
15404 data
->previous_valid
= 0;
15409 /* Write OBJFILE's address map to OBSTACK.
15410 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
15411 in the index file. */
15414 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
15415 htab_t cu_index_htab
)
15417 struct addrmap_index_data addrmap_index_data
;
15419 /* When writing the address table, we have to cope with the fact that
15420 the addrmap iterator only provides the start of a region; we have to
15421 wait until the next invocation to get the start of the next region. */
15423 addrmap_index_data
.objfile
= objfile
;
15424 addrmap_index_data
.addr_obstack
= obstack
;
15425 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
15426 addrmap_index_data
.previous_valid
= 0;
15428 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
15429 &addrmap_index_data
);
15431 /* It's highly unlikely the last entry (end address = 0xff...ff)
15432 is valid, but we should still handle it.
15433 The end address is recorded as the start of the next region, but that
15434 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
15436 if (addrmap_index_data
.previous_valid
)
15437 add_address_entry (objfile
, obstack
,
15438 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
15439 addrmap_index_data
.previous_cu_index
);
15442 /* Add a list of partial symbols to SYMTAB. */
15445 write_psymbols (struct mapped_symtab
*symtab
,
15447 struct partial_symbol
**psymp
,
15449 offset_type cu_index
,
15452 for (; count
-- > 0; ++psymp
)
15454 void **slot
, *lookup
;
15456 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
15457 error (_("Ada is not currently supported by the index"));
15459 /* We only want to add a given psymbol once. However, we also
15460 want to account for whether it is global or static. So, we
15461 may add it twice, using slightly different values. */
15464 uintptr_t val
= 1 | (uintptr_t) *psymp
;
15466 lookup
= (void *) val
;
15471 /* Only add a given psymbol once. */
15472 slot
= htab_find_slot (psyms_seen
, lookup
, INSERT
);
15476 add_index_entry (symtab
, SYMBOL_NATURAL_NAME (*psymp
), cu_index
);
15481 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
15482 exception if there is an error. */
15485 write_obstack (FILE *file
, struct obstack
*obstack
)
15487 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
15489 != obstack_object_size (obstack
))
15490 error (_("couldn't data write to file"));
15493 /* Unlink a file if the argument is not NULL. */
15496 unlink_if_set (void *p
)
15498 char **filename
= p
;
15500 unlink (*filename
);
15503 /* A helper struct used when iterating over debug_types. */
15504 struct signatured_type_index_data
15506 struct objfile
*objfile
;
15507 struct mapped_symtab
*symtab
;
15508 struct obstack
*types_list
;
15513 /* A helper function that writes a single signatured_type to an
15517 write_one_signatured_type (void **slot
, void *d
)
15519 struct signatured_type_index_data
*info
= d
;
15520 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
15521 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
15522 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15525 write_psymbols (info
->symtab
,
15527 info
->objfile
->global_psymbols
.list
15528 + psymtab
->globals_offset
,
15529 psymtab
->n_global_syms
, info
->cu_index
,
15531 write_psymbols (info
->symtab
,
15533 info
->objfile
->static_psymbols
.list
15534 + psymtab
->statics_offset
,
15535 psymtab
->n_static_syms
, info
->cu_index
,
15538 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->offset
);
15539 obstack_grow (info
->types_list
, val
, 8);
15540 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->type_offset
);
15541 obstack_grow (info
->types_list
, val
, 8);
15542 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
15543 obstack_grow (info
->types_list
, val
, 8);
15550 /* A cleanup function for an htab_t. */
15553 cleanup_htab (void *arg
)
15558 /* Create an index file for OBJFILE in the directory DIR. */
15561 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
15563 struct cleanup
*cleanup
;
15564 char *filename
, *cleanup_filename
;
15565 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
15566 struct obstack cu_list
, types_cu_list
;
15569 struct mapped_symtab
*symtab
;
15570 offset_type val
, size_of_contents
, total_len
;
15574 htab_t cu_index_htab
;
15575 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
15577 if (!objfile
->psymtabs
)
15579 if (dwarf2_per_objfile
->using_index
)
15580 error (_("Cannot use an index to create the index"));
15582 if (stat (objfile
->name
, &st
) < 0)
15583 perror_with_name (objfile
->name
);
15585 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
15586 INDEX_SUFFIX
, (char *) NULL
);
15587 cleanup
= make_cleanup (xfree
, filename
);
15589 out_file
= fopen (filename
, "wb");
15591 error (_("Can't open `%s' for writing"), filename
);
15593 cleanup_filename
= filename
;
15594 make_cleanup (unlink_if_set
, &cleanup_filename
);
15596 symtab
= create_mapped_symtab ();
15597 make_cleanup (cleanup_mapped_symtab
, symtab
);
15599 obstack_init (&addr_obstack
);
15600 make_cleanup_obstack_free (&addr_obstack
);
15602 obstack_init (&cu_list
);
15603 make_cleanup_obstack_free (&cu_list
);
15605 obstack_init (&types_cu_list
);
15606 make_cleanup_obstack_free (&types_cu_list
);
15608 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
15609 NULL
, xcalloc
, xfree
);
15610 make_cleanup (cleanup_htab
, psyms_seen
);
15612 /* While we're scanning CU's create a table that maps a psymtab pointer
15613 (which is what addrmap records) to its index (which is what is recorded
15614 in the index file). This will later be needed to write the address
15616 cu_index_htab
= htab_create_alloc (100,
15617 hash_psymtab_cu_index
,
15618 eq_psymtab_cu_index
,
15619 NULL
, xcalloc
, xfree
);
15620 make_cleanup (cleanup_htab
, cu_index_htab
);
15621 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
15622 xmalloc (sizeof (struct psymtab_cu_index_map
)
15623 * dwarf2_per_objfile
->n_comp_units
);
15624 make_cleanup (xfree
, psymtab_cu_index_map
);
15626 /* The CU list is already sorted, so we don't need to do additional
15627 work here. Also, the debug_types entries do not appear in
15628 all_comp_units, but only in their own hash table. */
15629 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
15631 struct dwarf2_per_cu_data
*per_cu
15632 = dwarf2_per_objfile
->all_comp_units
[i
];
15633 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15635 struct psymtab_cu_index_map
*map
;
15638 write_psymbols (symtab
,
15640 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
15641 psymtab
->n_global_syms
, i
,
15643 write_psymbols (symtab
,
15645 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
15646 psymtab
->n_static_syms
, i
,
15649 map
= &psymtab_cu_index_map
[i
];
15650 map
->psymtab
= psymtab
;
15652 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
15653 gdb_assert (slot
!= NULL
);
15654 gdb_assert (*slot
== NULL
);
15657 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->offset
);
15658 obstack_grow (&cu_list
, val
, 8);
15659 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
15660 obstack_grow (&cu_list
, val
, 8);
15663 /* Dump the address map. */
15664 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
15666 /* Write out the .debug_type entries, if any. */
15667 if (dwarf2_per_objfile
->signatured_types
)
15669 struct signatured_type_index_data sig_data
;
15671 sig_data
.objfile
= objfile
;
15672 sig_data
.symtab
= symtab
;
15673 sig_data
.types_list
= &types_cu_list
;
15674 sig_data
.psyms_seen
= psyms_seen
;
15675 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
15676 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
15677 write_one_signatured_type
, &sig_data
);
15680 obstack_init (&constant_pool
);
15681 make_cleanup_obstack_free (&constant_pool
);
15682 obstack_init (&symtab_obstack
);
15683 make_cleanup_obstack_free (&symtab_obstack
);
15684 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
15686 obstack_init (&contents
);
15687 make_cleanup_obstack_free (&contents
);
15688 size_of_contents
= 6 * sizeof (offset_type
);
15689 total_len
= size_of_contents
;
15691 /* The version number. */
15692 val
= MAYBE_SWAP (4);
15693 obstack_grow (&contents
, &val
, sizeof (val
));
15695 /* The offset of the CU list 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 (&cu_list
);
15700 /* The offset of the types CU list 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 (&types_cu_list
);
15705 /* The offset of the address table 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 (&addr_obstack
);
15710 /* The offset of the symbol table from the start of the file. */
15711 val
= MAYBE_SWAP (total_len
);
15712 obstack_grow (&contents
, &val
, sizeof (val
));
15713 total_len
+= obstack_object_size (&symtab_obstack
);
15715 /* The offset of the constant pool from the start of the file. */
15716 val
= MAYBE_SWAP (total_len
);
15717 obstack_grow (&contents
, &val
, sizeof (val
));
15718 total_len
+= obstack_object_size (&constant_pool
);
15720 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
15722 write_obstack (out_file
, &contents
);
15723 write_obstack (out_file
, &cu_list
);
15724 write_obstack (out_file
, &types_cu_list
);
15725 write_obstack (out_file
, &addr_obstack
);
15726 write_obstack (out_file
, &symtab_obstack
);
15727 write_obstack (out_file
, &constant_pool
);
15731 /* We want to keep the file, so we set cleanup_filename to NULL
15732 here. See unlink_if_set. */
15733 cleanup_filename
= NULL
;
15735 do_cleanups (cleanup
);
15738 /* The mapped index file format is designed to be directly mmap()able
15739 on any architecture. In most cases, a datum is represented using a
15740 little-endian 32-bit integer value, called an offset_type. Big
15741 endian machines must byte-swap the values before using them.
15742 Exceptions to this rule are noted. The data is laid out such that
15743 alignment is always respected.
15745 A mapped index consists of several sections.
15747 1. The file header. This is a sequence of values, of offset_type
15748 unless otherwise noted:
15750 [0] The version number, currently 4. Versions 1, 2 and 3 are
15752 [1] The offset, from the start of the file, of the CU list.
15753 [2] The offset, from the start of the file, of the types CU list.
15754 Note that this section can be empty, in which case this offset will
15755 be equal to the next offset.
15756 [3] The offset, from the start of the file, of the address section.
15757 [4] The offset, from the start of the file, of the symbol table.
15758 [5] The offset, from the start of the file, of the constant pool.
15760 2. The CU list. This is a sequence of pairs of 64-bit
15761 little-endian values, sorted by the CU offset. The first element
15762 in each pair is the offset of a CU in the .debug_info section. The
15763 second element in each pair is the length of that CU. References
15764 to a CU elsewhere in the map are done using a CU index, which is
15765 just the 0-based index into this table. Note that if there are
15766 type CUs, then conceptually CUs and type CUs form a single list for
15767 the purposes of CU indices.
15769 3. The types CU list. This is a sequence of triplets of 64-bit
15770 little-endian values. In a triplet, the first value is the CU
15771 offset, the second value is the type offset in the CU, and the
15772 third value is the type signature. The types CU list is not
15775 4. The address section. The address section consists of a sequence
15776 of address entries. Each address entry has three elements.
15777 [0] The low address. This is a 64-bit little-endian value.
15778 [1] The high address. This is a 64-bit little-endian value.
15779 Like DW_AT_high_pc, the value is one byte beyond the end.
15780 [2] The CU index. This is an offset_type value.
15782 5. The symbol table. This is a hash table. The size of the hash
15783 table is always a power of 2. The initial hash and the step are
15784 currently defined by the `find_slot' function.
15786 Each slot in the hash table consists of a pair of offset_type
15787 values. The first value is the offset of the symbol's name in the
15788 constant pool. The second value is the offset of the CU vector in
15791 If both values are 0, then this slot in the hash table is empty.
15792 This is ok because while 0 is a valid constant pool index, it
15793 cannot be a valid index for both a string and a CU vector.
15795 A string in the constant pool is stored as a \0-terminated string,
15798 A CU vector in the constant pool is a sequence of offset_type
15799 values. The first value is the number of CU indices in the vector.
15800 Each subsequent value is the index of a CU in the CU list. This
15801 element in the hash table is used to indicate which CUs define the
15804 6. The constant pool. This is simply a bunch of bytes. It is
15805 organized so that alignment is correct: CU vectors are stored
15806 first, followed by strings. */
15809 save_gdb_index_command (char *arg
, int from_tty
)
15811 struct objfile
*objfile
;
15814 error (_("usage: save gdb-index DIRECTORY"));
15816 ALL_OBJFILES (objfile
)
15820 /* If the objfile does not correspond to an actual file, skip it. */
15821 if (stat (objfile
->name
, &st
) < 0)
15824 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
15825 if (dwarf2_per_objfile
)
15827 volatile struct gdb_exception except
;
15829 TRY_CATCH (except
, RETURN_MASK_ERROR
)
15831 write_psymtabs_to_index (objfile
, arg
);
15833 if (except
.reason
< 0)
15834 exception_fprintf (gdb_stderr
, except
,
15835 _("Error while writing index for `%s': "),
15843 int dwarf2_always_disassemble
;
15846 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
15847 struct cmd_list_element
*c
, const char *value
)
15849 fprintf_filtered (file
,
15850 _("Whether to always disassemble "
15851 "DWARF expressions is %s.\n"),
15855 void _initialize_dwarf2_read (void);
15858 _initialize_dwarf2_read (void)
15860 struct cmd_list_element
*c
;
15862 dwarf2_objfile_data_key
15863 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
15865 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
15866 Set DWARF 2 specific variables.\n\
15867 Configure DWARF 2 variables such as the cache size"),
15868 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
15869 0/*allow-unknown*/, &maintenance_set_cmdlist
);
15871 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
15872 Show DWARF 2 specific variables\n\
15873 Show DWARF 2 variables such as the cache size"),
15874 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
15875 0/*allow-unknown*/, &maintenance_show_cmdlist
);
15877 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
15878 &dwarf2_max_cache_age
, _("\
15879 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
15880 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
15881 A higher limit means that cached compilation units will be stored\n\
15882 in memory longer, and more total memory will be used. Zero disables\n\
15883 caching, which can slow down startup."),
15885 show_dwarf2_max_cache_age
,
15886 &set_dwarf2_cmdlist
,
15887 &show_dwarf2_cmdlist
);
15889 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
15890 &dwarf2_always_disassemble
, _("\
15891 Set whether `info address' always disassembles DWARF expressions."), _("\
15892 Show whether `info address' always disassembles DWARF expressions."), _("\
15893 When enabled, DWARF expressions are always printed in an assembly-like\n\
15894 syntax. When disabled, expressions will be printed in a more\n\
15895 conversational style, when possible."),
15897 show_dwarf2_always_disassemble
,
15898 &set_dwarf2_cmdlist
,
15899 &show_dwarf2_cmdlist
);
15901 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
15902 Set debugging of the dwarf2 DIE reader."), _("\
15903 Show debugging of the dwarf2 DIE reader."), _("\
15904 When enabled (non-zero), DIEs are dumped after they are read in.\n\
15905 The value is the maximum depth to print."),
15908 &setdebuglist
, &showdebuglist
);
15910 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
15912 Save a gdb-index file.\n\
15913 Usage: save gdb-index DIRECTORY"),
15915 set_cmd_completer (c
, filename_completer
);