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
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"
56 #include "gdb_string.h"
57 #include "gdb_assert.h"
58 #include <sys/types.h>
65 #define MAP_FAILED ((void *) -1)
70 /* .debug_info header for a compilation unit
71 Because of alignment constraints, this structure has padding and cannot
72 be mapped directly onto the beginning of the .debug_info section. */
73 typedef struct comp_unit_header
75 unsigned int length
; /* length of the .debug_info
77 unsigned short version
; /* version number -- 2 for DWARF
79 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
80 unsigned char addr_size
; /* byte size of an address -- 4 */
83 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
86 /* .debug_line statement program prologue
87 Because of alignment constraints, this structure has padding and cannot
88 be mapped directly onto the beginning of the .debug_info section. */
89 typedef struct statement_prologue
91 unsigned int total_length
; /* byte length of the statement
93 unsigned short version
; /* version number -- 2 for DWARF
95 unsigned int prologue_length
; /* # bytes between prologue &
97 unsigned char minimum_instruction_length
; /* byte size of
99 unsigned char default_is_stmt
; /* initial value of is_stmt
102 unsigned char line_range
;
103 unsigned char opcode_base
; /* number assigned to first special
105 unsigned char *standard_opcode_lengths
;
109 /* When non-zero, dump DIEs after they are read in. */
110 static int dwarf2_die_debug
= 0;
114 /* When set, the file that we're processing is known to have debugging
115 info for C++ namespaces. GCC 3.3.x did not produce this information,
116 but later versions do. */
118 static int processing_has_namespace_info
;
120 static const struct objfile_data
*dwarf2_objfile_data_key
;
122 struct dwarf2_section_info
128 /* True if we have tried to read this section. */
132 struct dwarf2_per_objfile
134 struct dwarf2_section_info info
;
135 struct dwarf2_section_info abbrev
;
136 struct dwarf2_section_info line
;
137 struct dwarf2_section_info loc
;
138 struct dwarf2_section_info macinfo
;
139 struct dwarf2_section_info str
;
140 struct dwarf2_section_info ranges
;
141 struct dwarf2_section_info types
;
142 struct dwarf2_section_info frame
;
143 struct dwarf2_section_info eh_frame
;
146 struct objfile
*objfile
;
148 /* A list of all the compilation units. This is used to locate
149 the target compilation unit of a particular reference. */
150 struct dwarf2_per_cu_data
**all_comp_units
;
152 /* The number of compilation units in ALL_COMP_UNITS. */
155 /* A chain of compilation units that are currently read in, so that
156 they can be freed later. */
157 struct dwarf2_per_cu_data
*read_in_chain
;
159 /* A table mapping .debug_types signatures to its signatured_type entry.
160 This is NULL if the .debug_types section hasn't been read in yet. */
161 htab_t signatured_types
;
163 /* A flag indicating wether this objfile has a section loaded at a
165 int has_section_at_zero
;
168 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
170 /* names of the debugging sections */
172 /* Note that if the debugging section has been compressed, it might
173 have a name like .zdebug_info. */
175 #define INFO_SECTION "debug_info"
176 #define ABBREV_SECTION "debug_abbrev"
177 #define LINE_SECTION "debug_line"
178 #define LOC_SECTION "debug_loc"
179 #define MACINFO_SECTION "debug_macinfo"
180 #define STR_SECTION "debug_str"
181 #define RANGES_SECTION "debug_ranges"
182 #define TYPES_SECTION "debug_types"
183 #define FRAME_SECTION "debug_frame"
184 #define EH_FRAME_SECTION "eh_frame"
186 /* local data types */
188 /* We hold several abbreviation tables in memory at the same time. */
189 #ifndef ABBREV_HASH_SIZE
190 #define ABBREV_HASH_SIZE 121
193 /* The data in a compilation unit header, after target2host
194 translation, looks like this. */
195 struct comp_unit_head
199 unsigned char addr_size
;
200 unsigned char signed_addr_p
;
201 unsigned int abbrev_offset
;
203 /* Size of file offsets; either 4 or 8. */
204 unsigned int offset_size
;
206 /* Size of the length field; either 4 or 12. */
207 unsigned int initial_length_size
;
209 /* Offset to the first byte of this compilation unit header in the
210 .debug_info section, for resolving relative reference dies. */
213 /* Offset to first die in this cu from the start of the cu.
214 This will be the first byte following the compilation unit header. */
215 unsigned int first_die_offset
;
218 /* Internal state when decoding a particular compilation unit. */
221 /* The objfile containing this compilation unit. */
222 struct objfile
*objfile
;
224 /* The header of the compilation unit. */
225 struct comp_unit_head header
;
227 /* Base address of this compilation unit. */
228 CORE_ADDR base_address
;
230 /* Non-zero if base_address has been set. */
233 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
235 /* The language we are debugging. */
236 enum language language
;
237 const struct language_defn
*language_defn
;
239 const char *producer
;
241 /* The generic symbol table building routines have separate lists for
242 file scope symbols and all all other scopes (local scopes). So
243 we need to select the right one to pass to add_symbol_to_list().
244 We do it by keeping a pointer to the correct list in list_in_scope.
246 FIXME: The original dwarf code just treated the file scope as the
247 first local scope, and all other local scopes as nested local
248 scopes, and worked fine. Check to see if we really need to
249 distinguish these in buildsym.c. */
250 struct pending
**list_in_scope
;
252 /* DWARF abbreviation table associated with this compilation unit. */
253 struct abbrev_info
**dwarf2_abbrevs
;
255 /* Storage for the abbrev table. */
256 struct obstack abbrev_obstack
;
258 /* Hash table holding all the loaded partial DIEs. */
261 /* Storage for things with the same lifetime as this read-in compilation
262 unit, including partial DIEs. */
263 struct obstack comp_unit_obstack
;
265 /* When multiple dwarf2_cu structures are living in memory, this field
266 chains them all together, so that they can be released efficiently.
267 We will probably also want a generation counter so that most-recently-used
268 compilation units are cached... */
269 struct dwarf2_per_cu_data
*read_in_chain
;
271 /* Backchain to our per_cu entry if the tree has been built. */
272 struct dwarf2_per_cu_data
*per_cu
;
274 /* Pointer to the die -> type map. Although it is stored
275 permanently in per_cu, we copy it here to avoid double
279 /* How many compilation units ago was this CU last referenced? */
282 /* A hash table of die offsets for following references. */
285 /* Full DIEs if read in. */
286 struct die_info
*dies
;
288 /* A set of pointers to dwarf2_per_cu_data objects for compilation
289 units referenced by this one. Only set during full symbol processing;
290 partial symbol tables do not have dependencies. */
293 /* Header data from the line table, during full symbol processing. */
294 struct line_header
*line_header
;
296 /* Mark used when releasing cached dies. */
297 unsigned int mark
: 1;
299 /* This flag will be set if this compilation unit might include
300 inter-compilation-unit references. */
301 unsigned int has_form_ref_addr
: 1;
303 /* This flag will be set if this compilation unit includes any
304 DW_TAG_namespace DIEs. If we know that there are explicit
305 DIEs for namespaces, we don't need to try to infer them
306 from mangled names. */
307 unsigned int has_namespace_info
: 1;
310 /* Persistent data held for a compilation unit, even when not
311 processing it. We put a pointer to this structure in the
312 read_symtab_private field of the psymtab. If we encounter
313 inter-compilation-unit references, we also maintain a sorted
314 list of all compilation units. */
316 struct dwarf2_per_cu_data
318 /* The start offset and length of this compilation unit. 2**29-1
319 bytes should suffice to store the length of any compilation unit
320 - if it doesn't, GDB will fall over anyway.
321 NOTE: Unlike comp_unit_head.length, this length includes
322 initial_length_size. */
324 unsigned int length
: 29;
326 /* Flag indicating this compilation unit will be read in before
327 any of the current compilation units are processed. */
328 unsigned int queued
: 1;
330 /* This flag will be set if we need to load absolutely all DIEs
331 for this compilation unit, instead of just the ones we think
332 are interesting. It gets set if we look for a DIE in the
333 hash table and don't find it. */
334 unsigned int load_all_dies
: 1;
336 /* Non-zero if this CU is from .debug_types.
337 Otherwise it's from .debug_info. */
338 unsigned int from_debug_types
: 1;
340 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
341 of the CU cache it gets reset to NULL again. */
342 struct dwarf2_cu
*cu
;
344 /* If full symbols for this CU have been read in, then this field
345 holds a map of DIE offsets to types. It isn't always possible
346 to reconstruct this information later, so we have to preserve
350 /* The partial symbol table associated with this compilation unit,
351 or NULL for partial units (which do not have an associated
353 struct partial_symtab
*psymtab
;
356 /* Entry in the signatured_types hash table. */
358 struct signatured_type
362 /* Offset in .debug_types of the TU (type_unit) for this type. */
365 /* Offset in .debug_types of the type defined by this TU. */
366 unsigned int type_offset
;
368 /* The CU(/TU) of this type. */
369 struct dwarf2_per_cu_data per_cu
;
372 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
373 which are used for both .debug_info and .debug_types dies.
374 All parameters here are unchanging for the life of the call.
375 This struct exists to abstract away the constant parameters of
378 struct die_reader_specs
380 /* The bfd of this objfile. */
383 /* The CU of the DIE we are parsing. */
384 struct dwarf2_cu
*cu
;
386 /* Pointer to start of section buffer.
387 This is either the start of .debug_info or .debug_types. */
388 const gdb_byte
*buffer
;
391 /* The line number information for a compilation unit (found in the
392 .debug_line section) begins with a "statement program header",
393 which contains the following information. */
396 unsigned int total_length
;
397 unsigned short version
;
398 unsigned int header_length
;
399 unsigned char minimum_instruction_length
;
400 unsigned char maximum_ops_per_instruction
;
401 unsigned char default_is_stmt
;
403 unsigned char line_range
;
404 unsigned char opcode_base
;
406 /* standard_opcode_lengths[i] is the number of operands for the
407 standard opcode whose value is i. This means that
408 standard_opcode_lengths[0] is unused, and the last meaningful
409 element is standard_opcode_lengths[opcode_base - 1]. */
410 unsigned char *standard_opcode_lengths
;
412 /* The include_directories table. NOTE! These strings are not
413 allocated with xmalloc; instead, they are pointers into
414 debug_line_buffer. If you try to free them, `free' will get
416 unsigned int num_include_dirs
, include_dirs_size
;
419 /* The file_names table. NOTE! These strings are not allocated
420 with xmalloc; instead, they are pointers into debug_line_buffer.
421 Don't try to free them directly. */
422 unsigned int num_file_names
, file_names_size
;
426 unsigned int dir_index
;
427 unsigned int mod_time
;
429 int included_p
; /* Non-zero if referenced by the Line Number Program. */
430 struct symtab
*symtab
; /* The associated symbol table, if any. */
433 /* The start and end of the statement program following this
434 header. These point into dwarf2_per_objfile->line_buffer. */
435 gdb_byte
*statement_program_start
, *statement_program_end
;
438 /* When we construct a partial symbol table entry we only
439 need this much information. */
440 struct partial_die_info
442 /* Offset of this DIE. */
445 /* DWARF-2 tag for this DIE. */
446 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
448 /* Assorted flags describing the data found in this DIE. */
449 unsigned int has_children
: 1;
450 unsigned int is_external
: 1;
451 unsigned int is_declaration
: 1;
452 unsigned int has_type
: 1;
453 unsigned int has_specification
: 1;
454 unsigned int has_pc_info
: 1;
456 /* Flag set if the SCOPE field of this structure has been
458 unsigned int scope_set
: 1;
460 /* Flag set if the DIE has a byte_size attribute. */
461 unsigned int has_byte_size
: 1;
463 /* The name of this DIE. Normally the value of DW_AT_name, but
464 sometimes a default name for unnamed DIEs. */
467 /* The scope to prepend to our children. This is generally
468 allocated on the comp_unit_obstack, so will disappear
469 when this compilation unit leaves the cache. */
472 /* The location description associated with this DIE, if any. */
473 struct dwarf_block
*locdesc
;
475 /* If HAS_PC_INFO, the PC range associated with this DIE. */
479 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
480 DW_AT_sibling, if any. */
483 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
484 DW_AT_specification (or DW_AT_abstract_origin or
486 unsigned int spec_offset
;
488 /* Pointers to this DIE's parent, first child, and next sibling,
490 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
493 /* This data structure holds the information of an abbrev. */
496 unsigned int number
; /* number identifying abbrev */
497 enum dwarf_tag tag
; /* dwarf tag */
498 unsigned short has_children
; /* boolean */
499 unsigned short num_attrs
; /* number of attributes */
500 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
501 struct abbrev_info
*next
; /* next in chain */
506 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
507 ENUM_BITFIELD(dwarf_form
) form
: 16;
510 /* Attributes have a name and a value */
513 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
514 ENUM_BITFIELD(dwarf_form
) form
: 15;
516 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
517 field should be in u.str (existing only for DW_STRING) but it is kept
518 here for better struct attribute alignment. */
519 unsigned int string_is_canonical
: 1;
524 struct dwarf_block
*blk
;
528 struct signatured_type
*signatured_type
;
533 /* This data structure holds a complete die structure. */
536 /* DWARF-2 tag for this DIE. */
537 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
539 /* Number of attributes */
540 unsigned short num_attrs
;
545 /* Offset in .debug_info or .debug_types section. */
548 /* The dies in a compilation unit form an n-ary tree. PARENT
549 points to this die's parent; CHILD points to the first child of
550 this node; and all the children of a given node are chained
551 together via their SIBLING fields, terminated by a die whose
553 struct die_info
*child
; /* Its first child, if any. */
554 struct die_info
*sibling
; /* Its next sibling, if any. */
555 struct die_info
*parent
; /* Its parent, if any. */
557 /* An array of attributes, with NUM_ATTRS elements. There may be
558 zero, but it's not common and zero-sized arrays are not
559 sufficiently portable C. */
560 struct attribute attrs
[1];
563 struct function_range
566 CORE_ADDR lowpc
, highpc
;
568 struct function_range
*next
;
571 /* Get at parts of an attribute structure */
573 #define DW_STRING(attr) ((attr)->u.str)
574 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
575 #define DW_UNSND(attr) ((attr)->u.unsnd)
576 #define DW_BLOCK(attr) ((attr)->u.blk)
577 #define DW_SND(attr) ((attr)->u.snd)
578 #define DW_ADDR(attr) ((attr)->u.addr)
579 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
581 /* Blocks are a bunch of untyped bytes. */
588 #ifndef ATTR_ALLOC_CHUNK
589 #define ATTR_ALLOC_CHUNK 4
592 /* Allocate fields for structs, unions and enums in this size. */
593 #ifndef DW_FIELD_ALLOC_CHUNK
594 #define DW_FIELD_ALLOC_CHUNK 4
597 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
598 but this would require a corresponding change in unpack_field_as_long
600 static int bits_per_byte
= 8;
602 /* The routines that read and process dies for a C struct or C++ class
603 pass lists of data member fields and lists of member function fields
604 in an instance of a field_info structure, as defined below. */
607 /* List of data member and baseclasses fields. */
610 struct nextfield
*next
;
615 *fields
, *baseclasses
;
617 /* Number of fields (including baseclasses). */
620 /* Number of baseclasses. */
623 /* Set if the accesibility of one of the fields is not public. */
624 int non_public_fields
;
626 /* Member function fields array, entries are allocated in the order they
627 are encountered in the object file. */
630 struct nextfnfield
*next
;
631 struct fn_field fnfield
;
635 /* Member function fieldlist array, contains name of possibly overloaded
636 member function, number of overloaded member functions and a pointer
637 to the head of the member function field chain. */
642 struct nextfnfield
*head
;
646 /* Number of entries in the fnfieldlists array. */
650 /* One item on the queue of compilation units to read in full symbols
652 struct dwarf2_queue_item
654 struct dwarf2_per_cu_data
*per_cu
;
655 struct dwarf2_queue_item
*next
;
658 /* The current queue. */
659 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
661 /* Loaded secondary compilation units are kept in memory until they
662 have not been referenced for the processing of this many
663 compilation units. Set this to zero to disable caching. Cache
664 sizes of up to at least twenty will improve startup time for
665 typical inter-CU-reference binaries, at an obvious memory cost. */
666 static int dwarf2_max_cache_age
= 5;
668 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
669 struct cmd_list_element
*c
, const char *value
)
671 fprintf_filtered (file
, _("\
672 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
677 /* Various complaints about symbol reading that don't abort the process */
680 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
682 complaint (&symfile_complaints
,
683 _("statement list doesn't fit in .debug_line section"));
687 dwarf2_debug_line_missing_file_complaint (void)
689 complaint (&symfile_complaints
,
690 _(".debug_line section has line data without a file"));
694 dwarf2_debug_line_missing_end_sequence_complaint (void)
696 complaint (&symfile_complaints
,
697 _(".debug_line section has line program sequence without an end"));
701 dwarf2_complex_location_expr_complaint (void)
703 complaint (&symfile_complaints
, _("location expression too complex"));
707 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
710 complaint (&symfile_complaints
,
711 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
716 dwarf2_macros_too_long_complaint (void)
718 complaint (&symfile_complaints
,
719 _("macro info runs off end of `.debug_macinfo' section"));
723 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
725 complaint (&symfile_complaints
,
726 _("macro debug info contains a malformed macro definition:\n`%s'"),
731 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
733 complaint (&symfile_complaints
,
734 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
737 /* local function prototypes */
739 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
741 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
744 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
746 struct partial_symtab
*);
748 static void dwarf2_build_psymtabs_hard (struct objfile
*);
750 static void scan_partial_symbols (struct partial_die_info
*,
751 CORE_ADDR
*, CORE_ADDR
*,
752 int, struct dwarf2_cu
*);
754 static void add_partial_symbol (struct partial_die_info
*,
757 static void add_partial_namespace (struct partial_die_info
*pdi
,
758 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
759 int need_pc
, struct dwarf2_cu
*cu
);
761 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
762 CORE_ADDR
*highpc
, int need_pc
,
763 struct dwarf2_cu
*cu
);
765 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
766 struct dwarf2_cu
*cu
);
768 static void add_partial_subprogram (struct partial_die_info
*pdi
,
769 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
770 int need_pc
, struct dwarf2_cu
*cu
);
772 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
773 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
774 bfd
*abfd
, struct dwarf2_cu
*cu
);
776 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
778 static void psymtab_to_symtab_1 (struct partial_symtab
*);
780 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
782 static void dwarf2_free_abbrev_table (void *);
784 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
787 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
790 static struct partial_die_info
*load_partial_dies (bfd
*,
791 gdb_byte
*, gdb_byte
*,
792 int, struct dwarf2_cu
*);
794 static gdb_byte
*read_partial_die (struct partial_die_info
*,
795 struct abbrev_info
*abbrev
,
797 gdb_byte
*, gdb_byte
*,
800 static struct partial_die_info
*find_partial_die (unsigned int,
803 static void fixup_partial_die (struct partial_die_info
*,
806 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
807 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
809 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
810 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
812 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
814 static int read_1_signed_byte (bfd
*, gdb_byte
*);
816 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
818 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
820 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
822 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
825 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
827 static LONGEST read_checked_initial_length_and_offset
828 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
829 unsigned int *, unsigned int *);
831 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
834 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
836 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
838 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
840 static char *read_indirect_string (bfd
*, gdb_byte
*,
841 const struct comp_unit_head
*,
844 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
846 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
848 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
850 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
852 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
855 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
859 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
860 struct dwarf2_cu
*cu
);
862 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
864 static struct die_info
*die_specification (struct die_info
*die
,
865 struct dwarf2_cu
**);
867 static void free_line_header (struct line_header
*lh
);
869 static void add_file_name (struct line_header
*, char *, unsigned int,
870 unsigned int, unsigned int);
872 static struct line_header
*(dwarf_decode_line_header
873 (unsigned int offset
,
874 bfd
*abfd
, struct dwarf2_cu
*cu
));
876 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
877 struct dwarf2_cu
*, struct partial_symtab
*);
879 static void dwarf2_start_subfile (char *, char *, char *);
881 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
884 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
887 static void dwarf2_const_value_data (struct attribute
*attr
,
891 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
893 static int need_gnat_info (struct dwarf2_cu
*);
895 static struct type
*die_descriptive_type (struct die_info
*, struct dwarf2_cu
*);
897 static void set_descriptive_type (struct type
*, struct die_info
*,
900 static struct type
*die_containing_type (struct die_info
*,
903 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
905 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
907 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
909 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
910 const char *suffix
, int physname
,
911 struct dwarf2_cu
*cu
);
913 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
915 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
917 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
919 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
921 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
922 struct dwarf2_cu
*, struct partial_symtab
*);
924 static int dwarf2_get_pc_bounds (struct die_info
*,
925 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
926 struct partial_symtab
*);
928 static void get_scope_pc_bounds (struct die_info
*,
929 CORE_ADDR
*, CORE_ADDR
*,
932 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
933 CORE_ADDR
, struct dwarf2_cu
*);
935 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
938 static void dwarf2_attach_fields_to_type (struct field_info
*,
939 struct type
*, struct dwarf2_cu
*);
941 static void dwarf2_add_member_fn (struct field_info
*,
942 struct die_info
*, struct type
*,
945 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
946 struct type
*, struct dwarf2_cu
*);
948 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
950 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
952 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
954 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
956 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
958 static struct type
*read_module_type (struct die_info
*die
,
959 struct dwarf2_cu
*cu
);
961 static const char *namespace_name (struct die_info
*die
,
962 int *is_anonymous
, struct dwarf2_cu
*);
964 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
966 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
968 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
971 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
973 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
975 gdb_byte
**new_info_ptr
,
976 struct die_info
*parent
);
978 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
980 gdb_byte
**new_info_ptr
,
981 struct die_info
*parent
);
983 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
985 gdb_byte
**new_info_ptr
,
986 struct die_info
*parent
);
988 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
989 struct die_info
**, gdb_byte
*,
992 static void process_die (struct die_info
*, struct dwarf2_cu
*);
994 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
997 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
999 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1000 struct dwarf2_cu
**);
1002 static char *dwarf_tag_name (unsigned int);
1004 static char *dwarf_attr_name (unsigned int);
1006 static char *dwarf_form_name (unsigned int);
1008 static char *dwarf_bool_name (unsigned int);
1010 static char *dwarf_type_encoding_name (unsigned int);
1013 static char *dwarf_cfi_name (unsigned int);
1016 static struct die_info
*sibling_die (struct die_info
*);
1018 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1020 static void dump_die_for_error (struct die_info
*);
1022 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1025 /*static*/ void dump_die (struct die_info
*, int max_level
);
1027 static void store_in_ref_table (struct die_info
*,
1028 struct dwarf2_cu
*);
1030 static int is_ref_attr (struct attribute
*);
1032 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1034 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1036 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1038 struct dwarf2_cu
**);
1040 static struct die_info
*follow_die_ref (struct die_info
*,
1042 struct dwarf2_cu
**);
1044 static struct die_info
*follow_die_sig (struct die_info
*,
1046 struct dwarf2_cu
**);
1048 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1049 unsigned int offset
);
1051 static void read_signatured_type (struct objfile
*,
1052 struct signatured_type
*type_sig
);
1054 /* memory allocation interface */
1056 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1058 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1060 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1062 static void initialize_cu_func_list (struct dwarf2_cu
*);
1064 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1065 struct dwarf2_cu
*);
1067 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1068 char *, bfd
*, struct dwarf2_cu
*);
1070 static int attr_form_is_block (struct attribute
*);
1072 static int attr_form_is_section_offset (struct attribute
*);
1074 static int attr_form_is_constant (struct attribute
*);
1076 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1078 struct dwarf2_cu
*cu
);
1080 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1081 struct abbrev_info
*abbrev
,
1082 struct dwarf2_cu
*cu
);
1084 static void free_stack_comp_unit (void *);
1086 static hashval_t
partial_die_hash (const void *item
);
1088 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1090 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1091 (unsigned int offset
, struct objfile
*objfile
);
1093 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1094 (unsigned int offset
, struct objfile
*objfile
);
1096 static struct dwarf2_cu
*alloc_one_comp_unit (struct objfile
*objfile
);
1098 static void free_one_comp_unit (void *);
1100 static void free_cached_comp_units (void *);
1102 static void age_cached_comp_units (void);
1104 static void free_one_cached_comp_unit (void *);
1106 static struct type
*set_die_type (struct die_info
*, struct type
*,
1107 struct dwarf2_cu
*);
1109 static void create_all_comp_units (struct objfile
*);
1111 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1114 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1116 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1117 struct dwarf2_per_cu_data
*);
1119 static void dwarf2_mark (struct dwarf2_cu
*);
1121 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1123 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1125 /* Try to locate the sections we need for DWARF 2 debugging
1126 information and return true if we have enough to do something. */
1129 dwarf2_has_info (struct objfile
*objfile
)
1131 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1132 if (!dwarf2_per_objfile
)
1134 /* Initialize per-objfile state. */
1135 struct dwarf2_per_objfile
*data
1136 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1138 memset (data
, 0, sizeof (*data
));
1139 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1140 dwarf2_per_objfile
= data
;
1142 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1143 dwarf2_per_objfile
->objfile
= objfile
;
1145 return (dwarf2_per_objfile
->info
.asection
!= NULL
1146 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1149 /* When loading sections, we can either look for ".<name>", or for
1150 * ".z<name>", which indicates a compressed section. */
1153 section_is_p (const char *section_name
, const char *name
)
1155 return (section_name
[0] == '.'
1156 && (strcmp (section_name
+ 1, name
) == 0
1157 || (section_name
[1] == 'z'
1158 && strcmp (section_name
+ 2, name
) == 0)));
1161 /* This function is mapped across the sections and remembers the
1162 offset and size of each of the debugging sections we are interested
1166 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1168 if (section_is_p (sectp
->name
, INFO_SECTION
))
1170 dwarf2_per_objfile
->info
.asection
= sectp
;
1171 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1173 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1175 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1176 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1178 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1180 dwarf2_per_objfile
->line
.asection
= sectp
;
1181 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1183 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1185 dwarf2_per_objfile
->loc
.asection
= sectp
;
1186 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1188 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1190 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1191 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1193 else if (section_is_p (sectp
->name
, STR_SECTION
))
1195 dwarf2_per_objfile
->str
.asection
= sectp
;
1196 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1198 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1200 dwarf2_per_objfile
->frame
.asection
= sectp
;
1201 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1203 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1205 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1207 if (aflag
& SEC_HAS_CONTENTS
)
1209 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1210 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1213 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1215 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1216 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1218 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1220 dwarf2_per_objfile
->types
.asection
= sectp
;
1221 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1224 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1225 && bfd_section_vma (abfd
, sectp
) == 0)
1226 dwarf2_per_objfile
->has_section_at_zero
= 1;
1229 /* Decompress a section that was compressed using zlib. Store the
1230 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1233 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1234 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1236 bfd
*abfd
= objfile
->obfd
;
1238 error (_("Support for zlib-compressed DWARF data (from '%s') "
1239 "is disabled in this copy of GDB"),
1240 bfd_get_filename (abfd
));
1242 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1243 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1244 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1245 bfd_size_type uncompressed_size
;
1246 gdb_byte
*uncompressed_buffer
;
1249 int header_size
= 12;
1251 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1252 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1253 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1254 bfd_get_filename (abfd
));
1256 /* Read the zlib header. In this case, it should be "ZLIB" followed
1257 by the uncompressed section size, 8 bytes in big-endian order. */
1258 if (compressed_size
< header_size
1259 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1260 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1261 bfd_get_filename (abfd
));
1262 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1263 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1264 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1265 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1266 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1267 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1268 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1269 uncompressed_size
+= compressed_buffer
[11];
1271 /* It is possible the section consists of several compressed
1272 buffers concatenated together, so we uncompress in a loop. */
1276 strm
.avail_in
= compressed_size
- header_size
;
1277 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1278 strm
.avail_out
= uncompressed_size
;
1279 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1281 rc
= inflateInit (&strm
);
1282 while (strm
.avail_in
> 0)
1285 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1286 bfd_get_filename (abfd
), rc
);
1287 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1288 + (uncompressed_size
- strm
.avail_out
));
1289 rc
= inflate (&strm
, Z_FINISH
);
1290 if (rc
!= Z_STREAM_END
)
1291 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1292 bfd_get_filename (abfd
), rc
);
1293 rc
= inflateReset (&strm
);
1295 rc
= inflateEnd (&strm
);
1297 || strm
.avail_out
!= 0)
1298 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1299 bfd_get_filename (abfd
), rc
);
1301 do_cleanups (cleanup
);
1302 *outbuf
= uncompressed_buffer
;
1303 *outsize
= uncompressed_size
;
1307 /* Read the contents of the section SECTP from object file specified by
1308 OBJFILE, store info about the section into INFO.
1309 If the section is compressed, uncompress it before returning. */
1312 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1314 bfd
*abfd
= objfile
->obfd
;
1315 asection
*sectp
= info
->asection
;
1316 gdb_byte
*buf
, *retbuf
;
1317 unsigned char header
[4];
1321 info
->buffer
= NULL
;
1322 info
->was_mmapped
= 0;
1325 if (info
->asection
== NULL
|| info
->size
== 0)
1328 /* Check if the file has a 4-byte header indicating compression. */
1329 if (info
->size
> sizeof (header
)
1330 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1331 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1333 /* Upon decompression, update the buffer and its size. */
1334 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1336 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1344 pagesize
= getpagesize ();
1346 /* Only try to mmap sections which are large enough: we don't want to
1347 waste space due to fragmentation. Also, only try mmap for sections
1348 without relocations. */
1350 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1352 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1353 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1354 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1355 MAP_PRIVATE
, pg_offset
);
1357 if (retbuf
!= MAP_FAILED
)
1359 info
->was_mmapped
= 1;
1360 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1361 #if HAVE_POSIX_MADVISE
1362 posix_madvise (retbuf
, map_length
, POSIX_MADV_WILLNEED
);
1369 /* If we get here, we are a normal, not-compressed section. */
1371 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1373 /* When debugging .o files, we may need to apply relocations; see
1374 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1375 We never compress sections in .o files, so we only need to
1376 try this when the section is not compressed. */
1377 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1380 info
->buffer
= retbuf
;
1384 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1385 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1386 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1387 bfd_get_filename (abfd
));
1390 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1394 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1395 asection
**sectp
, gdb_byte
**bufp
,
1396 bfd_size_type
*sizep
)
1398 struct dwarf2_per_objfile
*data
1399 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1400 struct dwarf2_section_info
*info
;
1402 /* We may see an objfile without any DWARF, in which case we just
1411 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1412 info
= &data
->eh_frame
;
1413 else if (section_is_p (section_name
, FRAME_SECTION
))
1414 info
= &data
->frame
;
1418 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1419 /* We haven't read this section in yet. Do it now. */
1420 dwarf2_read_section (objfile
, info
);
1422 *sectp
= info
->asection
;
1423 *bufp
= info
->buffer
;
1424 *sizep
= info
->size
;
1427 /* Build a partial symbol table. */
1430 dwarf2_build_psymtabs (struct objfile
*objfile
)
1432 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
1434 init_psymbol_list (objfile
, 1024);
1437 dwarf2_build_psymtabs_hard (objfile
);
1440 /* Return TRUE if OFFSET is within CU_HEADER. */
1443 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
1445 unsigned int bottom
= cu_header
->offset
;
1446 unsigned int top
= (cu_header
->offset
1448 + cu_header
->initial_length_size
);
1450 return (offset
>= bottom
&& offset
< top
);
1453 /* Read in the comp unit header information from the debug_info at info_ptr.
1454 NOTE: This leaves members offset, first_die_offset to be filled in
1458 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1459 gdb_byte
*info_ptr
, bfd
*abfd
)
1462 unsigned int bytes_read
;
1464 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
1465 cu_header
->initial_length_size
= bytes_read
;
1466 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
1467 info_ptr
+= bytes_read
;
1468 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1470 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1472 info_ptr
+= bytes_read
;
1473 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1475 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1476 if (signed_addr
< 0)
1477 internal_error (__FILE__
, __LINE__
,
1478 _("read_comp_unit_head: dwarf from non elf file"));
1479 cu_header
->signed_addr_p
= signed_addr
;
1485 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1486 gdb_byte
*buffer
, unsigned int buffer_size
,
1489 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1491 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1493 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
1494 error (_("Dwarf Error: wrong version in compilation unit header "
1495 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
1496 bfd_get_filename (abfd
));
1498 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
1499 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1500 "(offset 0x%lx + 6) [in module %s]"),
1501 (long) header
->abbrev_offset
,
1502 (long) (beg_of_comp_unit
- buffer
),
1503 bfd_get_filename (abfd
));
1505 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1506 > buffer
+ buffer_size
)
1507 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1508 "(offset 0x%lx + 0) [in module %s]"),
1509 (long) header
->length
,
1510 (long) (beg_of_comp_unit
- buffer
),
1511 bfd_get_filename (abfd
));
1516 /* Read in the types comp unit header information from .debug_types entry at
1517 types_ptr. The result is a pointer to one past the end of the header. */
1520 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
1521 ULONGEST
*signature
,
1522 gdb_byte
*types_ptr
, bfd
*abfd
)
1524 gdb_byte
*initial_types_ptr
= types_ptr
;
1526 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
1527 &dwarf2_per_objfile
->types
);
1528 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
1530 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
1532 *signature
= read_8_bytes (abfd
, types_ptr
);
1534 types_ptr
+= cu_header
->offset_size
;
1535 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
1540 /* Allocate a new partial symtab for file named NAME and mark this new
1541 partial symtab as being an include of PST. */
1544 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1545 struct objfile
*objfile
)
1547 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1549 subpst
->section_offsets
= pst
->section_offsets
;
1550 subpst
->textlow
= 0;
1551 subpst
->texthigh
= 0;
1553 subpst
->dependencies
= (struct partial_symtab
**)
1554 obstack_alloc (&objfile
->objfile_obstack
,
1555 sizeof (struct partial_symtab
*));
1556 subpst
->dependencies
[0] = pst
;
1557 subpst
->number_of_dependencies
= 1;
1559 subpst
->globals_offset
= 0;
1560 subpst
->n_global_syms
= 0;
1561 subpst
->statics_offset
= 0;
1562 subpst
->n_static_syms
= 0;
1563 subpst
->symtab
= NULL
;
1564 subpst
->read_symtab
= pst
->read_symtab
;
1567 /* No private part is necessary for include psymtabs. This property
1568 can be used to differentiate between such include psymtabs and
1569 the regular ones. */
1570 subpst
->read_symtab_private
= NULL
;
1573 /* Read the Line Number Program data and extract the list of files
1574 included by the source file represented by PST. Build an include
1575 partial symtab for each of these included files. */
1578 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1579 struct die_info
*die
,
1580 struct partial_symtab
*pst
)
1582 struct objfile
*objfile
= cu
->objfile
;
1583 bfd
*abfd
= objfile
->obfd
;
1584 struct line_header
*lh
= NULL
;
1585 struct attribute
*attr
;
1587 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
1590 unsigned int line_offset
= DW_UNSND (attr
);
1592 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
1595 return; /* No linetable, so no includes. */
1597 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1599 free_line_header (lh
);
1603 hash_type_signature (const void *item
)
1605 const struct signatured_type
*type_sig
= item
;
1607 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1608 return type_sig
->signature
;
1612 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
1614 const struct signatured_type
*lhs
= item_lhs
;
1615 const struct signatured_type
*rhs
= item_rhs
;
1617 return lhs
->signature
== rhs
->signature
;
1620 /* Create the hash table of all entries in the .debug_types section.
1621 The result is zero if there is an error (e.g. missing .debug_types section),
1622 otherwise non-zero. */
1625 create_debug_types_hash_table (struct objfile
*objfile
)
1630 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
1631 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
1633 if (info_ptr
== NULL
)
1635 dwarf2_per_objfile
->signatured_types
= NULL
;
1639 types_htab
= htab_create_alloc_ex (41,
1640 hash_type_signature
,
1643 &objfile
->objfile_obstack
,
1644 hashtab_obstack_allocate
,
1645 dummy_obstack_deallocate
);
1647 if (dwarf2_die_debug
)
1648 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
1650 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1652 unsigned int offset
;
1653 unsigned int offset_size
;
1654 unsigned int type_offset
;
1655 unsigned int length
, initial_length_size
;
1656 unsigned short version
;
1658 struct signatured_type
*type_sig
;
1660 gdb_byte
*ptr
= info_ptr
;
1662 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
1664 /* We need to read the type's signature in order to build the hash
1665 table, but we don't need to read anything else just yet. */
1667 /* Sanity check to ensure entire cu is present. */
1668 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
1669 if (ptr
+ length
+ initial_length_size
1670 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1672 complaint (&symfile_complaints
,
1673 _("debug type entry runs off end of `.debug_types' section, ignored"));
1677 offset_size
= initial_length_size
== 4 ? 4 : 8;
1678 ptr
+= initial_length_size
;
1679 version
= bfd_get_16 (objfile
->obfd
, ptr
);
1681 ptr
+= offset_size
; /* abbrev offset */
1682 ptr
+= 1; /* address size */
1683 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
1685 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
1687 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
1688 memset (type_sig
, 0, sizeof (*type_sig
));
1689 type_sig
->signature
= signature
;
1690 type_sig
->offset
= offset
;
1691 type_sig
->type_offset
= type_offset
;
1693 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
1694 gdb_assert (slot
!= NULL
);
1697 if (dwarf2_die_debug
)
1698 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
1699 offset
, phex (signature
, sizeof (signature
)));
1701 info_ptr
= info_ptr
+ initial_length_size
+ length
;
1704 dwarf2_per_objfile
->signatured_types
= types_htab
;
1709 /* Lookup a signature based type.
1710 Returns NULL if SIG is not present in the table. */
1712 static struct signatured_type
*
1713 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
1715 struct signatured_type find_entry
, *entry
;
1717 if (dwarf2_per_objfile
->signatured_types
== NULL
)
1719 complaint (&symfile_complaints
,
1720 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1724 find_entry
.signature
= sig
;
1725 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
1729 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1732 init_cu_die_reader (struct die_reader_specs
*reader
,
1733 struct dwarf2_cu
*cu
)
1735 reader
->abfd
= cu
->objfile
->obfd
;
1737 if (cu
->per_cu
->from_debug_types
)
1739 gdb_assert (dwarf2_per_objfile
->types
.readin
);
1740 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
1744 gdb_assert (dwarf2_per_objfile
->info
.readin
);
1745 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
1749 /* Find the base address of the compilation unit for range lists and
1750 location lists. It will normally be specified by DW_AT_low_pc.
1751 In DWARF-3 draft 4, the base address could be overridden by
1752 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1753 compilation units with discontinuous ranges. */
1756 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
1758 struct attribute
*attr
;
1761 cu
->base_address
= 0;
1763 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
1766 cu
->base_address
= DW_ADDR (attr
);
1771 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
1774 cu
->base_address
= DW_ADDR (attr
);
1780 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1781 to combine the common parts.
1782 Process a compilation unit for a psymtab.
1783 BUFFER is a pointer to the beginning of the dwarf section buffer,
1784 either .debug_info or debug_types.
1785 INFO_PTR is a pointer to the start of the CU.
1786 Returns a pointer to the next CU. */
1789 process_psymtab_comp_unit (struct objfile
*objfile
,
1790 struct dwarf2_per_cu_data
*this_cu
,
1791 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1792 unsigned int buffer_size
)
1794 bfd
*abfd
= objfile
->obfd
;
1795 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1796 struct die_info
*comp_unit_die
;
1797 struct partial_symtab
*pst
;
1799 struct cleanup
*back_to_inner
;
1800 struct dwarf2_cu cu
;
1801 int has_children
, has_pc_info
;
1802 struct attribute
*attr
;
1803 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
1804 struct die_reader_specs reader_specs
;
1806 memset (&cu
, 0, sizeof (cu
));
1807 cu
.objfile
= objfile
;
1808 obstack_init (&cu
.comp_unit_obstack
);
1810 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1812 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
1813 buffer
, buffer_size
,
1816 /* Complete the cu_header. */
1817 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
1818 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
1820 cu
.list_in_scope
= &file_symbols
;
1822 /* If this compilation unit was already read in, free the
1823 cached copy in order to read it in again. This is
1824 necessary because we skipped some symbols when we first
1825 read in the compilation unit (see load_partial_dies).
1826 This problem could be avoided, but the benefit is
1828 if (this_cu
->cu
!= NULL
)
1829 free_one_cached_comp_unit (this_cu
->cu
);
1831 /* Note that this is a pointer to our stack frame, being
1832 added to a global data structure. It will be cleaned up
1833 in free_stack_comp_unit when we finish with this
1834 compilation unit. */
1836 cu
.per_cu
= this_cu
;
1838 /* Read the abbrevs for this compilation unit into a table. */
1839 dwarf2_read_abbrevs (abfd
, &cu
);
1840 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1842 /* Read the compilation unit die. */
1843 if (this_cu
->from_debug_types
)
1844 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
1845 init_cu_die_reader (&reader_specs
, &cu
);
1846 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
1849 if (this_cu
->from_debug_types
)
1851 /* offset,length haven't been set yet for type units. */
1852 this_cu
->offset
= cu
.header
.offset
;
1853 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
1855 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
1857 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1858 + cu
.header
.initial_length_size
);
1859 do_cleanups (back_to_inner
);
1863 /* Set the language we're debugging. */
1864 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
1866 set_cu_language (DW_UNSND (attr
), &cu
);
1868 set_cu_language (language_minimal
, &cu
);
1870 /* Allocate a new partial symbol table structure. */
1871 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
1872 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1873 (attr
!= NULL
) ? DW_STRING (attr
) : "",
1874 /* TEXTLOW and TEXTHIGH are set below. */
1876 objfile
->global_psymbols
.next
,
1877 objfile
->static_psymbols
.next
);
1879 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
1881 pst
->dirname
= DW_STRING (attr
);
1883 pst
->read_symtab_private
= this_cu
;
1885 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1887 /* Store the function that reads in the rest of the symbol table */
1888 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1890 this_cu
->psymtab
= pst
;
1892 dwarf2_find_base_address (comp_unit_die
, &cu
);
1894 /* Possibly set the default values of LOWPC and HIGHPC from
1896 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
1897 &best_highpc
, &cu
, pst
);
1898 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
1899 /* Store the contiguous range if it is not empty; it can be empty for
1900 CUs with no code. */
1901 addrmap_set_empty (objfile
->psymtabs_addrmap
,
1902 best_lowpc
+ baseaddr
,
1903 best_highpc
+ baseaddr
- 1, pst
);
1905 /* Check if comp unit has_children.
1906 If so, read the rest of the partial symbols from this comp unit.
1907 If not, there's no more debug_info for this comp unit. */
1910 struct partial_die_info
*first_die
;
1911 CORE_ADDR lowpc
, highpc
;
1913 lowpc
= ((CORE_ADDR
) -1);
1914 highpc
= ((CORE_ADDR
) 0);
1916 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
1918 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
1919 ! has_pc_info
, &cu
);
1921 /* If we didn't find a lowpc, set it to highpc to avoid
1922 complaints from `maint check'. */
1923 if (lowpc
== ((CORE_ADDR
) -1))
1926 /* If the compilation unit didn't have an explicit address range,
1927 then use the information extracted from its child dies. */
1931 best_highpc
= highpc
;
1934 pst
->textlow
= best_lowpc
+ baseaddr
;
1935 pst
->texthigh
= best_highpc
+ baseaddr
;
1937 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1938 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1939 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1940 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1941 sort_pst_symbols (pst
);
1943 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1944 + cu
.header
.initial_length_size
);
1946 if (this_cu
->from_debug_types
)
1948 /* It's not clear we want to do anything with stmt lists here.
1949 Waiting to see what gcc ultimately does. */
1953 /* Get the list of files included in the current compilation unit,
1954 and build a psymtab for each of them. */
1955 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
1958 do_cleanups (back_to_inner
);
1963 /* Traversal function for htab_traverse_noresize.
1964 Process one .debug_types comp-unit. */
1967 process_type_comp_unit (void **slot
, void *info
)
1969 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
1970 struct objfile
*objfile
= (struct objfile
*) info
;
1971 struct dwarf2_per_cu_data
*this_cu
;
1973 this_cu
= &entry
->per_cu
;
1974 this_cu
->from_debug_types
= 1;
1976 gdb_assert (dwarf2_per_objfile
->types
.readin
);
1977 process_psymtab_comp_unit (objfile
, this_cu
,
1978 dwarf2_per_objfile
->types
.buffer
,
1979 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
1980 dwarf2_per_objfile
->types
.size
);
1985 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
1986 Build partial symbol tables for the .debug_types comp-units. */
1989 build_type_psymtabs (struct objfile
*objfile
)
1991 if (! create_debug_types_hash_table (objfile
))
1994 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
1995 process_type_comp_unit
, objfile
);
1998 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
2001 psymtabs_addrmap_cleanup (void *o
)
2003 struct objfile
*objfile
= o
;
2005 objfile
->psymtabs_addrmap
= NULL
;
2008 /* Build the partial symbol table by doing a quick pass through the
2009 .debug_info and .debug_abbrev sections. */
2012 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
2015 struct cleanup
*back_to
, *addrmap_cleanup
;
2016 struct obstack temp_obstack
;
2018 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
2019 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2021 /* Any cached compilation units will be linked by the per-objfile
2022 read_in_chain. Make sure to free them when we're done. */
2023 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2025 build_type_psymtabs (objfile
);
2027 create_all_comp_units (objfile
);
2029 /* Create a temporary address map on a temporary obstack. We later
2030 copy this to the final obstack. */
2031 obstack_init (&temp_obstack
);
2032 make_cleanup_obstack_free (&temp_obstack
);
2033 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
2034 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
2036 /* Since the objects we're extracting from .debug_info vary in
2037 length, only the individual functions to extract them (like
2038 read_comp_unit_head and load_partial_die) can really know whether
2039 the buffer is large enough to hold another complete object.
2041 At the moment, they don't actually check that. If .debug_info
2042 holds just one extra byte after the last compilation unit's dies,
2043 then read_comp_unit_head will happily read off the end of the
2044 buffer. read_partial_die is similarly casual. Those functions
2047 For this loop condition, simply checking whether there's any data
2048 left at all should be sufficient. */
2050 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
2051 + dwarf2_per_objfile
->info
.size
))
2053 struct dwarf2_per_cu_data
*this_cu
;
2055 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
2058 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
2059 dwarf2_per_objfile
->info
.buffer
,
2061 dwarf2_per_objfile
->info
.size
);
2064 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
2065 &objfile
->objfile_obstack
);
2066 discard_cleanups (addrmap_cleanup
);
2068 do_cleanups (back_to
);
2071 /* Load the partial DIEs for a secondary CU into memory. */
2074 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
2075 struct objfile
*objfile
)
2077 bfd
*abfd
= objfile
->obfd
;
2078 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
2079 struct die_info
*comp_unit_die
;
2080 struct dwarf2_cu
*cu
;
2081 struct cleanup
*back_to
;
2082 struct attribute
*attr
;
2084 struct die_reader_specs reader_specs
;
2086 gdb_assert (! this_cu
->from_debug_types
);
2088 gdb_assert (dwarf2_per_objfile
->info
.readin
);
2089 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
2090 beg_of_comp_unit
= info_ptr
;
2092 cu
= alloc_one_comp_unit (objfile
);
2094 /* ??? Missing cleanup for CU? */
2096 /* Link this compilation unit into the compilation unit tree. */
2098 cu
->per_cu
= this_cu
;
2099 cu
->type_hash
= this_cu
->type_hash
;
2101 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
2102 dwarf2_per_objfile
->info
.buffer
,
2103 dwarf2_per_objfile
->info
.size
,
2106 /* Complete the cu_header. */
2107 cu
->header
.offset
= this_cu
->offset
;
2108 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2110 /* Read the abbrevs for this compilation unit into a table. */
2111 dwarf2_read_abbrevs (abfd
, cu
);
2112 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2114 /* Read the compilation unit die. */
2115 init_cu_die_reader (&reader_specs
, cu
);
2116 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2119 /* Set the language we're debugging. */
2120 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
2122 set_cu_language (DW_UNSND (attr
), cu
);
2124 set_cu_language (language_minimal
, cu
);
2126 /* Check if comp unit has_children.
2127 If so, read the rest of the partial symbols from this comp unit.
2128 If not, there's no more debug_info for this comp unit. */
2130 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
2132 do_cleanups (back_to
);
2135 /* Create a list of all compilation units in OBJFILE. We do this only
2136 if an inter-comp-unit reference is found; presumably if there is one,
2137 there will be many, and one will occur early in the .debug_info section.
2138 So there's no point in building this list incrementally. */
2141 create_all_comp_units (struct objfile
*objfile
)
2145 struct dwarf2_per_cu_data
**all_comp_units
;
2148 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
2149 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2153 all_comp_units
= xmalloc (n_allocated
2154 * sizeof (struct dwarf2_per_cu_data
*));
2156 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
2158 unsigned int length
, initial_length_size
;
2159 struct dwarf2_per_cu_data
*this_cu
;
2160 unsigned int offset
;
2162 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
2164 /* Read just enough information to find out where the next
2165 compilation unit is. */
2166 length
= read_initial_length (objfile
->obfd
, info_ptr
,
2167 &initial_length_size
);
2169 /* Save the compilation unit for later lookup. */
2170 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
2171 sizeof (struct dwarf2_per_cu_data
));
2172 memset (this_cu
, 0, sizeof (*this_cu
));
2173 this_cu
->offset
= offset
;
2174 this_cu
->length
= length
+ initial_length_size
;
2176 if (n_comp_units
== n_allocated
)
2179 all_comp_units
= xrealloc (all_comp_units
,
2181 * sizeof (struct dwarf2_per_cu_data
*));
2183 all_comp_units
[n_comp_units
++] = this_cu
;
2185 info_ptr
= info_ptr
+ this_cu
->length
;
2188 dwarf2_per_objfile
->all_comp_units
2189 = obstack_alloc (&objfile
->objfile_obstack
,
2190 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2191 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
2192 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2193 xfree (all_comp_units
);
2194 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
2197 /* Process all loaded DIEs for compilation unit CU, starting at
2198 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2199 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2200 DW_AT_ranges). If NEED_PC is set, then this function will set
2201 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2202 and record the covered ranges in the addrmap. */
2205 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
2206 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2208 struct partial_die_info
*pdi
;
2210 /* Now, march along the PDI's, descending into ones which have
2211 interesting children but skipping the children of the other ones,
2212 until we reach the end of the compilation unit. */
2218 fixup_partial_die (pdi
, cu
);
2220 /* Anonymous namespaces or modules have no name but have interesting
2221 children, so we need to look at them. Ditto for anonymous
2224 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
2225 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
2229 case DW_TAG_subprogram
:
2230 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2232 case DW_TAG_variable
:
2233 case DW_TAG_typedef
:
2234 case DW_TAG_union_type
:
2235 if (!pdi
->is_declaration
)
2237 add_partial_symbol (pdi
, cu
);
2240 case DW_TAG_class_type
:
2241 case DW_TAG_interface_type
:
2242 case DW_TAG_structure_type
:
2243 if (!pdi
->is_declaration
)
2245 add_partial_symbol (pdi
, cu
);
2248 case DW_TAG_enumeration_type
:
2249 if (!pdi
->is_declaration
)
2250 add_partial_enumeration (pdi
, cu
);
2252 case DW_TAG_base_type
:
2253 case DW_TAG_subrange_type
:
2254 /* File scope base type definitions are added to the partial
2256 add_partial_symbol (pdi
, cu
);
2258 case DW_TAG_namespace
:
2259 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
2262 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
2269 /* If the die has a sibling, skip to the sibling. */
2271 pdi
= pdi
->die_sibling
;
2275 /* Functions used to compute the fully scoped name of a partial DIE.
2277 Normally, this is simple. For C++, the parent DIE's fully scoped
2278 name is concatenated with "::" and the partial DIE's name. For
2279 Java, the same thing occurs except that "." is used instead of "::".
2280 Enumerators are an exception; they use the scope of their parent
2281 enumeration type, i.e. the name of the enumeration type is not
2282 prepended to the enumerator.
2284 There are two complexities. One is DW_AT_specification; in this
2285 case "parent" means the parent of the target of the specification,
2286 instead of the direct parent of the DIE. The other is compilers
2287 which do not emit DW_TAG_namespace; in this case we try to guess
2288 the fully qualified name of structure types from their members'
2289 linkage names. This must be done using the DIE's children rather
2290 than the children of any DW_AT_specification target. We only need
2291 to do this for structures at the top level, i.e. if the target of
2292 any DW_AT_specification (if any; otherwise the DIE itself) does not
2295 /* Compute the scope prefix associated with PDI's parent, in
2296 compilation unit CU. The result will be allocated on CU's
2297 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2298 field. NULL is returned if no prefix is necessary. */
2300 partial_die_parent_scope (struct partial_die_info
*pdi
,
2301 struct dwarf2_cu
*cu
)
2303 char *grandparent_scope
;
2304 struct partial_die_info
*parent
, *real_pdi
;
2306 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2307 then this means the parent of the specification DIE. */
2310 while (real_pdi
->has_specification
)
2311 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2313 parent
= real_pdi
->die_parent
;
2317 if (parent
->scope_set
)
2318 return parent
->scope
;
2320 fixup_partial_die (parent
, cu
);
2322 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
2324 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
2325 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
2326 Work around this problem here. */
2327 if (cu
->language
== language_cplus
2328 && parent
->tag
== DW_TAG_namespace
2329 && strcmp (parent
->name
, "::") == 0
2330 && grandparent_scope
== NULL
)
2332 parent
->scope
= NULL
;
2333 parent
->scope_set
= 1;
2337 if (parent
->tag
== DW_TAG_namespace
2338 || parent
->tag
== DW_TAG_module
2339 || parent
->tag
== DW_TAG_structure_type
2340 || parent
->tag
== DW_TAG_class_type
2341 || parent
->tag
== DW_TAG_interface_type
2342 || parent
->tag
== DW_TAG_union_type
2343 || parent
->tag
== DW_TAG_enumeration_type
)
2345 if (grandparent_scope
== NULL
)
2346 parent
->scope
= parent
->name
;
2348 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
2349 parent
->name
, 0, cu
);
2351 else if (parent
->tag
== DW_TAG_enumerator
)
2352 /* Enumerators should not get the name of the enumeration as a prefix. */
2353 parent
->scope
= grandparent_scope
;
2356 /* FIXME drow/2004-04-01: What should we be doing with
2357 function-local names? For partial symbols, we should probably be
2359 complaint (&symfile_complaints
,
2360 _("unhandled containing DIE tag %d for DIE at %d"),
2361 parent
->tag
, pdi
->offset
);
2362 parent
->scope
= grandparent_scope
;
2365 parent
->scope_set
= 1;
2366 return parent
->scope
;
2369 /* Return the fully scoped name associated with PDI, from compilation unit
2370 CU. The result will be allocated with malloc. */
2372 partial_die_full_name (struct partial_die_info
*pdi
,
2373 struct dwarf2_cu
*cu
)
2377 parent_scope
= partial_die_parent_scope (pdi
, cu
);
2378 if (parent_scope
== NULL
)
2381 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
2385 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
2387 struct objfile
*objfile
= cu
->objfile
;
2389 char *actual_name
= NULL
;
2390 const struct partial_symbol
*psym
= NULL
;
2392 int built_actual_name
= 0;
2394 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2396 actual_name
= partial_die_full_name (pdi
, cu
);
2398 built_actual_name
= 1;
2400 if (actual_name
== NULL
)
2401 actual_name
= pdi
->name
;
2405 case DW_TAG_subprogram
:
2406 if (pdi
->is_external
|| cu
->language
== language_ada
)
2408 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2409 of the global scope. But in Ada, we want to be able to access
2410 nested procedures globally. So all Ada subprograms are stored
2411 in the global scope. */
2412 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2413 mst_text, objfile); */
2414 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2416 VAR_DOMAIN
, LOC_BLOCK
,
2417 &objfile
->global_psymbols
,
2418 0, pdi
->lowpc
+ baseaddr
,
2419 cu
->language
, objfile
);
2423 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2424 mst_file_text, objfile); */
2425 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2427 VAR_DOMAIN
, LOC_BLOCK
,
2428 &objfile
->static_psymbols
,
2429 0, pdi
->lowpc
+ baseaddr
,
2430 cu
->language
, objfile
);
2433 case DW_TAG_variable
:
2434 if (pdi
->is_external
)
2437 Don't enter into the minimal symbol tables as there is
2438 a minimal symbol table entry from the ELF symbols already.
2439 Enter into partial symbol table if it has a location
2440 descriptor or a type.
2441 If the location descriptor is missing, new_symbol will create
2442 a LOC_UNRESOLVED symbol, the address of the variable will then
2443 be determined from the minimal symbol table whenever the variable
2445 The address for the partial symbol table entry is not
2446 used by GDB, but it comes in handy for debugging partial symbol
2450 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2451 if (pdi
->locdesc
|| pdi
->has_type
)
2452 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2454 VAR_DOMAIN
, LOC_STATIC
,
2455 &objfile
->global_psymbols
,
2457 cu
->language
, objfile
);
2461 /* Static Variable. Skip symbols without location descriptors. */
2462 if (pdi
->locdesc
== NULL
)
2464 if (built_actual_name
)
2465 xfree (actual_name
);
2468 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2469 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2470 mst_file_data, objfile); */
2471 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2473 VAR_DOMAIN
, LOC_STATIC
,
2474 &objfile
->static_psymbols
,
2476 cu
->language
, objfile
);
2479 case DW_TAG_typedef
:
2480 case DW_TAG_base_type
:
2481 case DW_TAG_subrange_type
:
2482 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2484 VAR_DOMAIN
, LOC_TYPEDEF
,
2485 &objfile
->static_psymbols
,
2486 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2488 case DW_TAG_namespace
:
2489 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2491 VAR_DOMAIN
, LOC_TYPEDEF
,
2492 &objfile
->global_psymbols
,
2493 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2495 case DW_TAG_class_type
:
2496 case DW_TAG_interface_type
:
2497 case DW_TAG_structure_type
:
2498 case DW_TAG_union_type
:
2499 case DW_TAG_enumeration_type
:
2500 /* Skip external references. The DWARF standard says in the section
2501 about "Structure, Union, and Class Type Entries": "An incomplete
2502 structure, union or class type is represented by a structure,
2503 union or class entry that does not have a byte size attribute
2504 and that has a DW_AT_declaration attribute." */
2505 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2507 if (built_actual_name
)
2508 xfree (actual_name
);
2512 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2513 static vs. global. */
2514 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2516 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2517 (cu
->language
== language_cplus
2518 || cu
->language
== language_java
)
2519 ? &objfile
->global_psymbols
2520 : &objfile
->static_psymbols
,
2521 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2524 case DW_TAG_enumerator
:
2525 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2527 VAR_DOMAIN
, LOC_CONST
,
2528 (cu
->language
== language_cplus
2529 || cu
->language
== language_java
)
2530 ? &objfile
->global_psymbols
2531 : &objfile
->static_psymbols
,
2532 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2538 if (built_actual_name
)
2539 xfree (actual_name
);
2542 /* Read a partial die corresponding to a namespace; also, add a symbol
2543 corresponding to that namespace to the symbol table. NAMESPACE is
2544 the name of the enclosing namespace. */
2547 add_partial_namespace (struct partial_die_info
*pdi
,
2548 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2549 int need_pc
, struct dwarf2_cu
*cu
)
2551 /* Add a symbol for the namespace. */
2553 add_partial_symbol (pdi
, cu
);
2555 /* Now scan partial symbols in that namespace. */
2557 if (pdi
->has_children
)
2558 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2561 /* Read a partial die corresponding to a Fortran module. */
2564 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
2565 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2567 /* Now scan partial symbols in that module. */
2569 if (pdi
->has_children
)
2570 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2573 /* Read a partial die corresponding to a subprogram and create a partial
2574 symbol for that subprogram. When the CU language allows it, this
2575 routine also defines a partial symbol for each nested subprogram
2576 that this subprogram contains.
2578 DIE my also be a lexical block, in which case we simply search
2579 recursively for suprograms defined inside that lexical block.
2580 Again, this is only performed when the CU language allows this
2581 type of definitions. */
2584 add_partial_subprogram (struct partial_die_info
*pdi
,
2585 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2586 int need_pc
, struct dwarf2_cu
*cu
)
2588 if (pdi
->tag
== DW_TAG_subprogram
)
2590 if (pdi
->has_pc_info
)
2592 if (pdi
->lowpc
< *lowpc
)
2593 *lowpc
= pdi
->lowpc
;
2594 if (pdi
->highpc
> *highpc
)
2595 *highpc
= pdi
->highpc
;
2599 struct objfile
*objfile
= cu
->objfile
;
2601 baseaddr
= ANOFFSET (objfile
->section_offsets
,
2602 SECT_OFF_TEXT (objfile
));
2603 addrmap_set_empty (objfile
->psymtabs_addrmap
,
2604 pdi
->lowpc
+ baseaddr
,
2605 pdi
->highpc
- 1 + baseaddr
,
2606 cu
->per_cu
->psymtab
);
2608 if (!pdi
->is_declaration
)
2609 /* Ignore subprogram DIEs that do not have a name, they are
2610 illegal. Do not emit a complaint at this point, we will
2611 do so when we convert this psymtab into a symtab. */
2613 add_partial_symbol (pdi
, cu
);
2617 if (! pdi
->has_children
)
2620 if (cu
->language
== language_ada
)
2622 pdi
= pdi
->die_child
;
2625 fixup_partial_die (pdi
, cu
);
2626 if (pdi
->tag
== DW_TAG_subprogram
2627 || pdi
->tag
== DW_TAG_lexical_block
)
2628 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2629 pdi
= pdi
->die_sibling
;
2634 /* See if we can figure out if the class lives in a namespace. We do
2635 this by looking for a member function; its demangled name will
2636 contain namespace info, if there is any. */
2639 guess_structure_name (struct partial_die_info
*struct_pdi
,
2640 struct dwarf2_cu
*cu
)
2642 if ((cu
->language
== language_cplus
2643 || cu
->language
== language_java
)
2644 && cu
->has_namespace_info
== 0
2645 && struct_pdi
->has_children
)
2647 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2648 what template types look like, because the demangler
2649 frequently doesn't give the same name as the debug info. We
2650 could fix this by only using the demangled name to get the
2651 prefix (but see comment in read_structure_type). */
2653 struct partial_die_info
*real_pdi
;
2655 /* If this DIE (this DIE's specification, if any) has a parent, then
2656 we should not do this. We'll prepend the parent's fully qualified
2657 name when we create the partial symbol. */
2659 real_pdi
= struct_pdi
;
2660 while (real_pdi
->has_specification
)
2661 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2663 if (real_pdi
->die_parent
!= NULL
)
2668 /* Read a partial die corresponding to an enumeration type. */
2671 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2672 struct dwarf2_cu
*cu
)
2674 struct partial_die_info
*pdi
;
2676 if (enum_pdi
->name
!= NULL
)
2677 add_partial_symbol (enum_pdi
, cu
);
2679 pdi
= enum_pdi
->die_child
;
2682 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2683 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2685 add_partial_symbol (pdi
, cu
);
2686 pdi
= pdi
->die_sibling
;
2690 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2691 Return the corresponding abbrev, or NULL if the number is zero (indicating
2692 an empty DIE). In either case *BYTES_READ will be set to the length of
2693 the initial number. */
2695 static struct abbrev_info
*
2696 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2697 struct dwarf2_cu
*cu
)
2699 bfd
*abfd
= cu
->objfile
->obfd
;
2700 unsigned int abbrev_number
;
2701 struct abbrev_info
*abbrev
;
2703 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2705 if (abbrev_number
== 0)
2708 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2711 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2712 bfd_get_filename (abfd
));
2718 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2719 Returns a pointer to the end of a series of DIEs, terminated by an empty
2720 DIE. Any children of the skipped DIEs will also be skipped. */
2723 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2725 struct abbrev_info
*abbrev
;
2726 unsigned int bytes_read
;
2730 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2732 return info_ptr
+ bytes_read
;
2734 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
2738 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2739 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2740 abbrev corresponding to that skipped uleb128 should be passed in
2741 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2745 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2746 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
2748 unsigned int bytes_read
;
2749 struct attribute attr
;
2750 bfd
*abfd
= cu
->objfile
->obfd
;
2751 unsigned int form
, i
;
2753 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2755 /* The only abbrev we care about is DW_AT_sibling. */
2756 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2758 read_attribute (&attr
, &abbrev
->attrs
[i
],
2759 abfd
, info_ptr
, cu
);
2760 if (attr
.form
== DW_FORM_ref_addr
)
2761 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2763 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
2766 /* If it isn't DW_AT_sibling, skip this attribute. */
2767 form
= abbrev
->attrs
[i
].form
;
2771 case DW_FORM_ref_addr
:
2772 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
2773 and later it is offset sized. */
2774 if (cu
->header
.version
== 2)
2775 info_ptr
+= cu
->header
.addr_size
;
2777 info_ptr
+= cu
->header
.offset_size
;
2780 info_ptr
+= cu
->header
.addr_size
;
2787 case DW_FORM_flag_present
:
2802 case DW_FORM_string
:
2803 read_string (abfd
, info_ptr
, &bytes_read
);
2804 info_ptr
+= bytes_read
;
2806 case DW_FORM_sec_offset
:
2808 info_ptr
+= cu
->header
.offset_size
;
2810 case DW_FORM_exprloc
:
2812 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2813 info_ptr
+= bytes_read
;
2815 case DW_FORM_block1
:
2816 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2818 case DW_FORM_block2
:
2819 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2821 case DW_FORM_block4
:
2822 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2826 case DW_FORM_ref_udata
:
2827 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2829 case DW_FORM_indirect
:
2830 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2831 info_ptr
+= bytes_read
;
2832 /* We need to continue parsing from here, so just go back to
2834 goto skip_attribute
;
2837 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2838 dwarf_form_name (form
),
2839 bfd_get_filename (abfd
));
2843 if (abbrev
->has_children
)
2844 return skip_children (buffer
, info_ptr
, cu
);
2849 /* Locate ORIG_PDI's sibling.
2850 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2854 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
2855 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2856 bfd
*abfd
, struct dwarf2_cu
*cu
)
2858 /* Do we know the sibling already? */
2860 if (orig_pdi
->sibling
)
2861 return orig_pdi
->sibling
;
2863 /* Are there any children to deal with? */
2865 if (!orig_pdi
->has_children
)
2868 /* Skip the children the long way. */
2870 return skip_children (buffer
, info_ptr
, cu
);
2873 /* Expand this partial symbol table into a full symbol table. */
2876 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2878 /* FIXME: This is barely more than a stub. */
2883 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2889 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2890 gdb_flush (gdb_stdout
);
2893 /* Restore our global data. */
2894 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2895 dwarf2_objfile_data_key
);
2897 /* If this psymtab is constructed from a debug-only objfile, the
2898 has_section_at_zero flag will not necessarily be correct. We
2899 can get the correct value for this flag by looking at the data
2900 associated with the (presumably stripped) associated objfile. */
2901 if (pst
->objfile
->separate_debug_objfile_backlink
)
2903 struct dwarf2_per_objfile
*dpo_backlink
2904 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
2905 dwarf2_objfile_data_key
);
2907 dwarf2_per_objfile
->has_section_at_zero
2908 = dpo_backlink
->has_section_at_zero
;
2911 psymtab_to_symtab_1 (pst
);
2913 /* Finish up the debug error message. */
2915 printf_filtered (_("done.\n"));
2920 /* Add PER_CU to the queue. */
2923 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2925 struct dwarf2_queue_item
*item
;
2928 item
= xmalloc (sizeof (*item
));
2929 item
->per_cu
= per_cu
;
2932 if (dwarf2_queue
== NULL
)
2933 dwarf2_queue
= item
;
2935 dwarf2_queue_tail
->next
= item
;
2937 dwarf2_queue_tail
= item
;
2940 /* Process the queue. */
2943 process_queue (struct objfile
*objfile
)
2945 struct dwarf2_queue_item
*item
, *next_item
;
2947 /* The queue starts out with one item, but following a DIE reference
2948 may load a new CU, adding it to the end of the queue. */
2949 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
2951 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
2952 process_full_comp_unit (item
->per_cu
);
2954 item
->per_cu
->queued
= 0;
2955 next_item
= item
->next
;
2959 dwarf2_queue_tail
= NULL
;
2962 /* Free all allocated queue entries. This function only releases anything if
2963 an error was thrown; if the queue was processed then it would have been
2964 freed as we went along. */
2967 dwarf2_release_queue (void *dummy
)
2969 struct dwarf2_queue_item
*item
, *last
;
2971 item
= dwarf2_queue
;
2974 /* Anything still marked queued is likely to be in an
2975 inconsistent state, so discard it. */
2976 if (item
->per_cu
->queued
)
2978 if (item
->per_cu
->cu
!= NULL
)
2979 free_one_cached_comp_unit (item
->per_cu
->cu
);
2980 item
->per_cu
->queued
= 0;
2988 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
2991 /* Read in full symbols for PST, and anything it depends on. */
2994 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2996 struct dwarf2_per_cu_data
*per_cu
;
2997 struct cleanup
*back_to
;
3000 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
3001 if (!pst
->dependencies
[i
]->readin
)
3003 /* Inform about additional files that need to be read in. */
3006 /* FIXME: i18n: Need to make this a single string. */
3007 fputs_filtered (" ", gdb_stdout
);
3009 fputs_filtered ("and ", gdb_stdout
);
3011 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
3012 wrap_here (""); /* Flush output */
3013 gdb_flush (gdb_stdout
);
3015 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
3018 per_cu
= pst
->read_symtab_private
;
3022 /* It's an include file, no symbols to read for it.
3023 Everything is in the parent symtab. */
3028 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
3030 queue_comp_unit (per_cu
, pst
->objfile
);
3032 if (per_cu
->from_debug_types
)
3033 read_signatured_type_at_offset (pst
->objfile
, per_cu
->offset
);
3035 load_full_comp_unit (per_cu
, pst
->objfile
);
3037 process_queue (pst
->objfile
);
3039 /* Age the cache, releasing compilation units that have not
3040 been used recently. */
3041 age_cached_comp_units ();
3043 do_cleanups (back_to
);
3046 /* Load the DIEs associated with PER_CU into memory. */
3049 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3051 bfd
*abfd
= objfile
->obfd
;
3052 struct dwarf2_cu
*cu
;
3053 unsigned int offset
;
3054 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3055 struct cleanup
*back_to
, *free_cu_cleanup
;
3056 struct attribute
*attr
;
3058 gdb_assert (! per_cu
->from_debug_types
);
3060 /* Set local variables from the partial symbol table info. */
3061 offset
= per_cu
->offset
;
3063 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3064 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
3065 beg_of_comp_unit
= info_ptr
;
3067 cu
= alloc_one_comp_unit (objfile
);
3069 /* If an error occurs while loading, release our storage. */
3070 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3072 /* Read in the comp_unit header. */
3073 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
3075 /* Complete the cu_header. */
3076 cu
->header
.offset
= offset
;
3077 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3079 /* Read the abbrevs for this compilation unit. */
3080 dwarf2_read_abbrevs (abfd
, cu
);
3081 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3083 /* Link this compilation unit into the compilation unit tree. */
3085 cu
->per_cu
= per_cu
;
3086 cu
->type_hash
= per_cu
->type_hash
;
3088 cu
->dies
= read_comp_unit (info_ptr
, cu
);
3090 /* We try not to read any attributes in this function, because not
3091 all objfiles needed for references have been loaded yet, and symbol
3092 table processing isn't initialized. But we have to set the CU language,
3093 or we won't be able to build types correctly. */
3094 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
3096 set_cu_language (DW_UNSND (attr
), cu
);
3098 set_cu_language (language_minimal
, cu
);
3100 /* Similarly, if we do not read the producer, we can not apply
3101 producer-specific interpretation. */
3102 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
3104 cu
->producer
= DW_STRING (attr
);
3106 /* Link this CU into read_in_chain. */
3107 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3108 dwarf2_per_objfile
->read_in_chain
= per_cu
;
3110 do_cleanups (back_to
);
3112 /* We've successfully allocated this compilation unit. Let our caller
3113 clean it up when finished with it. */
3114 discard_cleanups (free_cu_cleanup
);
3117 /* Generate full symbol information for PST and CU, whose DIEs have
3118 already been loaded into memory. */
3121 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
3123 struct partial_symtab
*pst
= per_cu
->psymtab
;
3124 struct dwarf2_cu
*cu
= per_cu
->cu
;
3125 struct objfile
*objfile
= pst
->objfile
;
3126 CORE_ADDR lowpc
, highpc
;
3127 struct symtab
*symtab
;
3128 struct cleanup
*back_to
;
3131 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3134 back_to
= make_cleanup (really_free_pendings
, NULL
);
3136 cu
->list_in_scope
= &file_symbols
;
3138 dwarf2_find_base_address (cu
->dies
, cu
);
3140 /* Do line number decoding in read_file_scope () */
3141 process_die (cu
->dies
, cu
);
3143 /* Some compilers don't define a DW_AT_high_pc attribute for the
3144 compilation unit. If the DW_AT_high_pc is missing, synthesize
3145 it, by scanning the DIE's below the compilation unit. */
3146 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
3148 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
3150 /* Set symtab language to language from DW_AT_language.
3151 If the compilation is from a C file generated by language preprocessors,
3152 do not set the language if it was already deduced by start_subfile. */
3154 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
3156 symtab
->language
= cu
->language
;
3158 pst
->symtab
= symtab
;
3161 do_cleanups (back_to
);
3164 /* Process a die and its children. */
3167 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
3171 case DW_TAG_padding
:
3173 case DW_TAG_compile_unit
:
3174 read_file_scope (die
, cu
);
3176 case DW_TAG_type_unit
:
3177 read_type_unit_scope (die
, cu
);
3179 case DW_TAG_subprogram
:
3180 case DW_TAG_inlined_subroutine
:
3181 read_func_scope (die
, cu
);
3183 case DW_TAG_lexical_block
:
3184 case DW_TAG_try_block
:
3185 case DW_TAG_catch_block
:
3186 read_lexical_block_scope (die
, cu
);
3188 case DW_TAG_class_type
:
3189 case DW_TAG_interface_type
:
3190 case DW_TAG_structure_type
:
3191 case DW_TAG_union_type
:
3192 process_structure_scope (die
, cu
);
3194 case DW_TAG_enumeration_type
:
3195 process_enumeration_scope (die
, cu
);
3198 /* These dies have a type, but processing them does not create
3199 a symbol or recurse to process the children. Therefore we can
3200 read them on-demand through read_type_die. */
3201 case DW_TAG_subroutine_type
:
3202 case DW_TAG_set_type
:
3203 case DW_TAG_array_type
:
3204 case DW_TAG_pointer_type
:
3205 case DW_TAG_ptr_to_member_type
:
3206 case DW_TAG_reference_type
:
3207 case DW_TAG_string_type
:
3210 case DW_TAG_base_type
:
3211 case DW_TAG_subrange_type
:
3212 case DW_TAG_typedef
:
3213 case DW_TAG_const_type
:
3214 case DW_TAG_volatile_type
:
3215 /* Add a typedef symbol for the type definition, if it has a
3217 new_symbol (die
, read_type_die (die
, cu
), cu
);
3219 case DW_TAG_common_block
:
3220 read_common_block (die
, cu
);
3222 case DW_TAG_common_inclusion
:
3224 case DW_TAG_namespace
:
3225 processing_has_namespace_info
= 1;
3226 read_namespace (die
, cu
);
3229 processing_has_namespace_info
= 1;
3230 read_module (die
, cu
);
3232 case DW_TAG_imported_declaration
:
3233 case DW_TAG_imported_module
:
3234 processing_has_namespace_info
= 1;
3235 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
3236 || cu
->language
!= language_fortran
))
3237 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
3238 dwarf_tag_name (die
->tag
));
3239 read_import_statement (die
, cu
);
3242 new_symbol (die
, NULL
, cu
);
3247 /* A helper function for dwarf2_compute_name which determines whether DIE
3248 needs to have the name of the scope prepended to the name listed in the
3252 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
3254 struct attribute
*attr
;
3258 case DW_TAG_namespace
:
3259 case DW_TAG_typedef
:
3260 case DW_TAG_class_type
:
3261 case DW_TAG_interface_type
:
3262 case DW_TAG_structure_type
:
3263 case DW_TAG_union_type
:
3264 case DW_TAG_enumeration_type
:
3265 case DW_TAG_enumerator
:
3266 case DW_TAG_subprogram
:
3270 case DW_TAG_variable
:
3271 /* We only need to prefix "globally" visible variables. These include
3272 any variable marked with DW_AT_external or any variable that
3273 lives in a namespace. [Variables in anonymous namespaces
3274 require prefixing, but they are not DW_AT_external.] */
3276 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
3278 struct dwarf2_cu
*spec_cu
= cu
;
3280 return die_needs_namespace (die_specification (die
, &spec_cu
),
3284 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
3285 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
3286 && die
->parent
->tag
!= DW_TAG_module
)
3288 /* A variable in a lexical block of some kind does not need a
3289 namespace, even though in C++ such variables may be external
3290 and have a mangled name. */
3291 if (die
->parent
->tag
== DW_TAG_lexical_block
3292 || die
->parent
->tag
== DW_TAG_try_block
3293 || die
->parent
->tag
== DW_TAG_catch_block
3294 || die
->parent
->tag
== DW_TAG_subprogram
)
3303 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
3304 compute the physname for the object, which include a method's
3305 formal parameters (C++/Java) and return type (Java).
3307 For Ada, return the DIE's linkage name rather than the fully qualified
3308 name. PHYSNAME is ignored..
3310 The result is allocated on the objfile_obstack and canonicalized. */
3313 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
3317 name
= dwarf2_name (die
, cu
);
3319 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
3320 compute it by typename_concat inside GDB. */
3321 if (cu
->language
== language_ada
3322 || (cu
->language
== language_fortran
&& physname
))
3324 /* For Ada unit, we prefer the linkage name over the name, as
3325 the former contains the exported name, which the user expects
3326 to be able to reference. Ideally, we want the user to be able
3327 to reference this entity using either natural or linkage name,
3328 but we haven't started looking at this enhancement yet. */
3329 struct attribute
*attr
;
3331 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
3333 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
3334 if (attr
&& DW_STRING (attr
))
3335 return DW_STRING (attr
);
3338 /* These are the only languages we know how to qualify names in. */
3340 && (cu
->language
== language_cplus
|| cu
->language
== language_java
3341 || cu
->language
== language_fortran
))
3343 if (die_needs_namespace (die
, cu
))
3347 struct ui_file
*buf
;
3349 prefix
= determine_prefix (die
, cu
);
3350 buf
= mem_fileopen ();
3351 if (*prefix
!= '\0')
3353 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
3356 fputs_unfiltered (prefixed_name
, buf
);
3357 xfree (prefixed_name
);
3360 fputs_unfiltered (name
? name
: "", buf
);
3362 /* For Java and C++ methods, append formal parameter type
3363 information, if PHYSNAME. */
3365 if (physname
&& die
->tag
== DW_TAG_subprogram
3366 && (cu
->language
== language_cplus
3367 || cu
->language
== language_java
))
3369 struct type
*type
= read_type_die (die
, cu
);
3371 c_type_print_args (type
, buf
, 0, cu
->language
);
3373 if (cu
->language
== language_java
)
3375 /* For java, we must append the return type to method
3377 if (die
->tag
== DW_TAG_subprogram
)
3378 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
3381 else if (cu
->language
== language_cplus
)
3383 if (TYPE_NFIELDS (type
) > 0
3384 && TYPE_FIELD_ARTIFICIAL (type
, 0)
3385 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
, 0))))
3386 fputs_unfiltered (" const", buf
);
3390 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
3392 ui_file_delete (buf
);
3394 if (cu
->language
== language_cplus
)
3397 = dwarf2_canonicalize_name (name
, cu
,
3398 &cu
->objfile
->objfile_obstack
);
3409 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3410 If scope qualifiers are appropriate they will be added. The result
3411 will be allocated on the objfile_obstack, or NULL if the DIE does
3412 not have a name. NAME may either be from a previous call to
3413 dwarf2_name or NULL.
3415 The output string will be canonicalized (if C++/Java). */
3418 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
3420 return dwarf2_compute_name (name
, die
, cu
, 0);
3423 /* Construct a physname for the given DIE in CU. NAME may either be
3424 from a previous call to dwarf2_name or NULL. The result will be
3425 allocated on the objfile_objstack or NULL if the DIE does not have a
3428 The output string will be canonicalized (if C++/Java). */
3431 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
3433 return dwarf2_compute_name (name
, die
, cu
, 1);
3436 /* Read the import statement specified by the given die and record it. */
3439 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
3441 struct attribute
*import_attr
;
3442 struct die_info
*imported_die
;
3443 struct dwarf2_cu
*imported_cu
;
3444 const char *imported_name
;
3445 const char *imported_name_prefix
;
3446 const char *canonical_name
;
3447 const char *import_alias
;
3448 const char *imported_declaration
= NULL
;
3449 const char *import_prefix
;
3453 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
3454 if (import_attr
== NULL
)
3456 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
3457 dwarf_tag_name (die
->tag
));
3462 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
3463 imported_name
= dwarf2_name (imported_die
, imported_cu
);
3464 if (imported_name
== NULL
)
3466 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3468 The import in the following code:
3482 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3483 <52> DW_AT_decl_file : 1
3484 <53> DW_AT_decl_line : 6
3485 <54> DW_AT_import : <0x75>
3486 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3488 <5b> DW_AT_decl_file : 1
3489 <5c> DW_AT_decl_line : 2
3490 <5d> DW_AT_type : <0x6e>
3492 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3493 <76> DW_AT_byte_size : 4
3494 <77> DW_AT_encoding : 5 (signed)
3496 imports the wrong die ( 0x75 instead of 0x58 ).
3497 This case will be ignored until the gcc bug is fixed. */
3501 /* Figure out the local name after import. */
3502 import_alias
= dwarf2_name (die
, cu
);
3504 /* Figure out where the statement is being imported to. */
3505 import_prefix
= determine_prefix (die
, cu
);
3507 /* Figure out what the scope of the imported die is and prepend it
3508 to the name of the imported die. */
3509 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
3511 if (imported_die
->tag
!= DW_TAG_namespace
3512 && imported_die
->tag
!= DW_TAG_module
)
3514 imported_declaration
= imported_name
;
3515 canonical_name
= imported_name_prefix
;
3517 else if (strlen (imported_name_prefix
) > 0)
3519 temp
= alloca (strlen (imported_name_prefix
)
3520 + 2 + strlen (imported_name
) + 1);
3521 strcpy (temp
, imported_name_prefix
);
3522 strcat (temp
, "::");
3523 strcat (temp
, imported_name
);
3524 canonical_name
= temp
;
3527 canonical_name
= imported_name
;
3529 cp_add_using_directive (import_prefix
,
3532 imported_declaration
,
3533 &cu
->objfile
->objfile_obstack
);
3537 initialize_cu_func_list (struct dwarf2_cu
*cu
)
3539 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
3543 free_cu_line_header (void *arg
)
3545 struct dwarf2_cu
*cu
= arg
;
3547 free_line_header (cu
->line_header
);
3548 cu
->line_header
= NULL
;
3552 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3554 struct objfile
*objfile
= cu
->objfile
;
3555 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3556 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
3557 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
3558 struct attribute
*attr
;
3560 char *comp_dir
= NULL
;
3561 struct die_info
*child_die
;
3562 bfd
*abfd
= objfile
->obfd
;
3563 struct line_header
*line_header
= 0;
3566 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3568 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
3570 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3571 from finish_block. */
3572 if (lowpc
== ((CORE_ADDR
) -1))
3577 /* Find the filename. Do not use dwarf2_name here, since the filename
3578 is not a source language identifier. */
3579 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3582 name
= DW_STRING (attr
);
3585 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3587 comp_dir
= DW_STRING (attr
);
3588 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3590 comp_dir
= ldirname (name
);
3591 if (comp_dir
!= NULL
)
3592 make_cleanup (xfree
, comp_dir
);
3594 if (comp_dir
!= NULL
)
3596 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3597 directory, get rid of it. */
3598 char *cp
= strchr (comp_dir
, ':');
3600 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
3607 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3610 set_cu_language (DW_UNSND (attr
), cu
);
3613 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3615 cu
->producer
= DW_STRING (attr
);
3617 /* We assume that we're processing GCC output. */
3618 processing_gcc_compilation
= 2;
3620 processing_has_namespace_info
= 0;
3622 start_symtab (name
, comp_dir
, lowpc
);
3623 record_debugformat ("DWARF 2");
3624 record_producer (cu
->producer
);
3626 initialize_cu_func_list (cu
);
3628 /* Decode line number information if present. We do this before
3629 processing child DIEs, so that the line header table is available
3630 for DW_AT_decl_file. */
3631 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3634 unsigned int line_offset
= DW_UNSND (attr
);
3635 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3638 cu
->line_header
= line_header
;
3639 make_cleanup (free_cu_line_header
, cu
);
3640 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
3644 /* Process all dies in compilation unit. */
3645 if (die
->child
!= NULL
)
3647 child_die
= die
->child
;
3648 while (child_die
&& child_die
->tag
)
3650 process_die (child_die
, cu
);
3651 child_die
= sibling_die (child_die
);
3655 /* Decode macro information, if present. Dwarf 2 macro information
3656 refers to information in the line number info statement program
3657 header, so we can only read it if we've read the header
3659 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
3660 if (attr
&& line_header
)
3662 unsigned int macro_offset
= DW_UNSND (attr
);
3664 dwarf_decode_macros (line_header
, macro_offset
,
3665 comp_dir
, abfd
, cu
);
3667 do_cleanups (back_to
);
3670 /* For TUs we want to skip the first top level sibling if it's not the
3671 actual type being defined by this TU. In this case the first top
3672 level sibling is there to provide context only. */
3675 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3677 struct objfile
*objfile
= cu
->objfile
;
3678 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3680 struct attribute
*attr
;
3682 char *comp_dir
= NULL
;
3683 struct die_info
*child_die
;
3684 bfd
*abfd
= objfile
->obfd
;
3686 /* start_symtab needs a low pc, but we don't really have one.
3687 Do what read_file_scope would do in the absence of such info. */
3688 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3690 /* Find the filename. Do not use dwarf2_name here, since the filename
3691 is not a source language identifier. */
3692 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3694 name
= DW_STRING (attr
);
3696 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3698 comp_dir
= DW_STRING (attr
);
3699 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3701 comp_dir
= ldirname (name
);
3702 if (comp_dir
!= NULL
)
3703 make_cleanup (xfree
, comp_dir
);
3709 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3711 set_cu_language (DW_UNSND (attr
), cu
);
3713 /* This isn't technically needed today. It is done for symmetry
3714 with read_file_scope. */
3715 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3717 cu
->producer
= DW_STRING (attr
);
3719 /* We assume that we're processing GCC output. */
3720 processing_gcc_compilation
= 2;
3722 processing_has_namespace_info
= 0;
3724 start_symtab (name
, comp_dir
, lowpc
);
3725 record_debugformat ("DWARF 2");
3726 record_producer (cu
->producer
);
3728 /* Process the dies in the type unit. */
3729 if (die
->child
== NULL
)
3731 dump_die_for_error (die
);
3732 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3733 bfd_get_filename (abfd
));
3736 child_die
= die
->child
;
3738 while (child_die
&& child_die
->tag
)
3740 process_die (child_die
, cu
);
3742 child_die
= sibling_die (child_die
);
3745 do_cleanups (back_to
);
3749 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
3750 struct dwarf2_cu
*cu
)
3752 struct function_range
*thisfn
;
3754 thisfn
= (struct function_range
*)
3755 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
3756 thisfn
->name
= name
;
3757 thisfn
->lowpc
= lowpc
;
3758 thisfn
->highpc
= highpc
;
3759 thisfn
->seen_line
= 0;
3760 thisfn
->next
= NULL
;
3762 if (cu
->last_fn
== NULL
)
3763 cu
->first_fn
= thisfn
;
3765 cu
->last_fn
->next
= thisfn
;
3767 cu
->last_fn
= thisfn
;
3770 /* qsort helper for inherit_abstract_dies. */
3773 unsigned_int_compar (const void *ap
, const void *bp
)
3775 unsigned int a
= *(unsigned int *) ap
;
3776 unsigned int b
= *(unsigned int *) bp
;
3778 return (a
> b
) - (b
> a
);
3781 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3782 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3783 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3786 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
3788 struct die_info
*child_die
;
3789 unsigned die_children_count
;
3790 /* CU offsets which were referenced by children of the current DIE. */
3792 unsigned *offsets_end
, *offsetp
;
3793 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3794 struct die_info
*origin_die
;
3795 /* Iterator of the ORIGIN_DIE children. */
3796 struct die_info
*origin_child_die
;
3797 struct cleanup
*cleanups
;
3798 struct attribute
*attr
;
3800 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
3804 origin_die
= follow_die_ref (die
, attr
, &cu
);
3805 if (die
->tag
!= origin_die
->tag
3806 && !(die
->tag
== DW_TAG_inlined_subroutine
3807 && origin_die
->tag
== DW_TAG_subprogram
))
3808 complaint (&symfile_complaints
,
3809 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3810 die
->offset
, origin_die
->offset
);
3812 child_die
= die
->child
;
3813 die_children_count
= 0;
3814 while (child_die
&& child_die
->tag
)
3816 child_die
= sibling_die (child_die
);
3817 die_children_count
++;
3819 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
3820 cleanups
= make_cleanup (xfree
, offsets
);
3822 offsets_end
= offsets
;
3823 child_die
= die
->child
;
3824 while (child_die
&& child_die
->tag
)
3826 /* For each CHILD_DIE, find the corresponding child of
3827 ORIGIN_DIE. If there is more than one layer of
3828 DW_AT_abstract_origin, follow them all; there shouldn't be,
3829 but GCC versions at least through 4.4 generate this (GCC PR
3831 struct die_info
*child_origin_die
= child_die
;
3835 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
, cu
);
3838 child_origin_die
= follow_die_ref (child_origin_die
, attr
, &cu
);
3841 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3842 counterpart may exist. */
3843 if (child_origin_die
!= child_die
)
3845 if (child_die
->tag
!= child_origin_die
->tag
3846 && !(child_die
->tag
== DW_TAG_inlined_subroutine
3847 && child_origin_die
->tag
== DW_TAG_subprogram
))
3848 complaint (&symfile_complaints
,
3849 _("Child DIE 0x%x and its abstract origin 0x%x have "
3850 "different tags"), child_die
->offset
,
3851 child_origin_die
->offset
);
3852 if (child_origin_die
->parent
!= origin_die
)
3853 complaint (&symfile_complaints
,
3854 _("Child DIE 0x%x and its abstract origin 0x%x have "
3855 "different parents"), child_die
->offset
,
3856 child_origin_die
->offset
);
3858 *offsets_end
++ = child_origin_die
->offset
;
3860 child_die
= sibling_die (child_die
);
3862 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
3863 unsigned_int_compar
);
3864 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
3865 if (offsetp
[-1] == *offsetp
)
3866 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
3867 "to DIE 0x%x as their abstract origin"),
3868 die
->offset
, *offsetp
);
3871 origin_child_die
= origin_die
->child
;
3872 while (origin_child_die
&& origin_child_die
->tag
)
3874 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3875 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
3877 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
3879 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3880 process_die (origin_child_die
, cu
);
3882 origin_child_die
= sibling_die (origin_child_die
);
3885 do_cleanups (cleanups
);
3889 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3891 struct objfile
*objfile
= cu
->objfile
;
3892 struct context_stack
*new;
3895 struct die_info
*child_die
;
3896 struct attribute
*attr
, *call_line
, *call_file
;
3899 struct block
*block
;
3900 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
3904 /* If we do not have call site information, we can't show the
3905 caller of this inlined function. That's too confusing, so
3906 only use the scope for local variables. */
3907 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
3908 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
3909 if (call_line
== NULL
|| call_file
== NULL
)
3911 read_lexical_block_scope (die
, cu
);
3916 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3918 name
= dwarf2_name (die
, cu
);
3920 /* Ignore functions with missing or empty names. These are actually
3921 illegal according to the DWARF standard. */
3924 complaint (&symfile_complaints
,
3925 _("missing name for subprogram DIE at %d"), die
->offset
);
3929 /* Ignore functions with missing or invalid low and high pc attributes. */
3930 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3932 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
3933 if (!attr
|| !DW_UNSND (attr
))
3934 complaint (&symfile_complaints
,
3935 _("cannot get low and high bounds for subprogram DIE at %d"),
3943 /* Record the function range for dwarf_decode_lines. */
3944 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3946 new = push_context (0, lowpc
);
3947 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
3949 /* If there is a location expression for DW_AT_frame_base, record
3951 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3953 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3954 expression is being recorded directly in the function's symbol
3955 and not in a separate frame-base object. I guess this hack is
3956 to avoid adding some sort of frame-base adjunct/annex to the
3957 function's symbol :-(. The problem with doing this is that it
3958 results in a function symbol with a location expression that
3959 has nothing to do with the location of the function, ouch! The
3960 relationship should be: a function's symbol has-a frame base; a
3961 frame-base has-a location expression. */
3962 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3964 cu
->list_in_scope
= &local_symbols
;
3966 if (die
->child
!= NULL
)
3968 child_die
= die
->child
;
3969 while (child_die
&& child_die
->tag
)
3971 process_die (child_die
, cu
);
3972 child_die
= sibling_die (child_die
);
3976 inherit_abstract_dies (die
, cu
);
3978 /* If we have a DW_AT_specification, we might need to import using
3979 directives from the context of the specification DIE. See the
3980 comment in determine_prefix. */
3981 if (cu
->language
== language_cplus
3982 && dwarf2_attr (die
, DW_AT_specification
, cu
))
3984 struct dwarf2_cu
*spec_cu
= cu
;
3985 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
3989 child_die
= spec_die
->child
;
3990 while (child_die
&& child_die
->tag
)
3992 if (child_die
->tag
== DW_TAG_imported_module
)
3993 process_die (child_die
, spec_cu
);
3994 child_die
= sibling_die (child_die
);
3997 /* In some cases, GCC generates specification DIEs that
3998 themselves contain DW_AT_specification attributes. */
3999 spec_die
= die_specification (spec_die
, &spec_cu
);
4003 new = pop_context ();
4004 /* Make a block for the local symbols within. */
4005 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
4006 lowpc
, highpc
, objfile
);
4008 /* For C++, set the block's scope. */
4009 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
4010 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
4011 determine_prefix (die
, cu
),
4012 processing_has_namespace_info
);
4014 /* If we have address ranges, record them. */
4015 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
4017 /* In C++, we can have functions nested inside functions (e.g., when
4018 a function declares a class that has methods). This means that
4019 when we finish processing a function scope, we may need to go
4020 back to building a containing block's symbol lists. */
4021 local_symbols
= new->locals
;
4022 param_symbols
= new->params
;
4023 using_directives
= new->using_directives
;
4025 /* If we've finished processing a top-level function, subsequent
4026 symbols go in the file symbol list. */
4027 if (outermost_context_p ())
4028 cu
->list_in_scope
= &file_symbols
;
4031 /* Process all the DIES contained within a lexical block scope. Start
4032 a new scope, process the dies, and then close the scope. */
4035 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4037 struct objfile
*objfile
= cu
->objfile
;
4038 struct context_stack
*new;
4039 CORE_ADDR lowpc
, highpc
;
4040 struct die_info
*child_die
;
4043 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4045 /* Ignore blocks with missing or invalid low and high pc attributes. */
4046 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
4047 as multiple lexical blocks? Handling children in a sane way would
4048 be nasty. Might be easier to properly extend generic blocks to
4050 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
4055 push_context (0, lowpc
);
4056 if (die
->child
!= NULL
)
4058 child_die
= die
->child
;
4059 while (child_die
&& child_die
->tag
)
4061 process_die (child_die
, cu
);
4062 child_die
= sibling_die (child_die
);
4065 new = pop_context ();
4067 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
4070 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
4073 /* Note that recording ranges after traversing children, as we
4074 do here, means that recording a parent's ranges entails
4075 walking across all its children's ranges as they appear in
4076 the address map, which is quadratic behavior.
4078 It would be nicer to record the parent's ranges before
4079 traversing its children, simply overriding whatever you find
4080 there. But since we don't even decide whether to create a
4081 block until after we've traversed its children, that's hard
4083 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
4085 local_symbols
= new->locals
;
4086 using_directives
= new->using_directives
;
4089 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
4090 Return 1 if the attributes are present and valid, otherwise, return 0.
4091 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
4094 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
4095 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
4096 struct partial_symtab
*ranges_pst
)
4098 struct objfile
*objfile
= cu
->objfile
;
4099 struct comp_unit_head
*cu_header
= &cu
->header
;
4100 bfd
*obfd
= objfile
->obfd
;
4101 unsigned int addr_size
= cu_header
->addr_size
;
4102 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4103 /* Base address selection entry. */
4114 found_base
= cu
->base_known
;
4115 base
= cu
->base_address
;
4117 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
4118 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4120 complaint (&symfile_complaints
,
4121 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4125 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4127 /* Read in the largest possible address. */
4128 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
4129 if ((marker
& mask
) == mask
)
4131 /* If we found the largest possible address, then
4132 read the base address. */
4133 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4134 buffer
+= 2 * addr_size
;
4135 offset
+= 2 * addr_size
;
4141 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4145 CORE_ADDR range_beginning
, range_end
;
4147 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
4148 buffer
+= addr_size
;
4149 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
4150 buffer
+= addr_size
;
4151 offset
+= 2 * addr_size
;
4153 /* An end of list marker is a pair of zero addresses. */
4154 if (range_beginning
== 0 && range_end
== 0)
4155 /* Found the end of list entry. */
4158 /* Each base address selection entry is a pair of 2 values.
4159 The first is the largest possible address, the second is
4160 the base address. Check for a base address here. */
4161 if ((range_beginning
& mask
) == mask
)
4163 /* If we found the largest possible address, then
4164 read the base address. */
4165 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4172 /* We have no valid base address for the ranges
4174 complaint (&symfile_complaints
,
4175 _("Invalid .debug_ranges data (no base address)"));
4179 range_beginning
+= base
;
4182 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
4183 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4184 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
4187 /* FIXME: This is recording everything as a low-high
4188 segment of consecutive addresses. We should have a
4189 data structure for discontiguous block ranges
4193 low
= range_beginning
;
4199 if (range_beginning
< low
)
4200 low
= range_beginning
;
4201 if (range_end
> high
)
4207 /* If the first entry is an end-of-list marker, the range
4208 describes an empty scope, i.e. no instructions. */
4214 *high_return
= high
;
4218 /* Get low and high pc attributes from a die. Return 1 if the attributes
4219 are present and valid, otherwise, return 0. Return -1 if the range is
4220 discontinuous, i.e. derived from DW_AT_ranges information. */
4222 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
4223 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
4224 struct partial_symtab
*pst
)
4226 struct attribute
*attr
;
4231 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4234 high
= DW_ADDR (attr
);
4235 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4237 low
= DW_ADDR (attr
);
4239 /* Found high w/o low attribute. */
4242 /* Found consecutive range of addresses. */
4247 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4250 /* Value of the DW_AT_ranges attribute is the offset in the
4251 .debug_ranges section. */
4252 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
4254 /* Found discontinuous range of addresses. */
4262 /* When using the GNU linker, .gnu.linkonce. sections are used to
4263 eliminate duplicate copies of functions and vtables and such.
4264 The linker will arbitrarily choose one and discard the others.
4265 The AT_*_pc values for such functions refer to local labels in
4266 these sections. If the section from that file was discarded, the
4267 labels are not in the output, so the relocs get a value of 0.
4268 If this is a discarded function, mark the pc bounds as invalid,
4269 so that GDB will ignore it. */
4270 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
4278 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4279 its low and high PC addresses. Do nothing if these addresses could not
4280 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4281 and HIGHPC to the high address if greater than HIGHPC. */
4284 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
4285 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4286 struct dwarf2_cu
*cu
)
4288 CORE_ADDR low
, high
;
4289 struct die_info
*child
= die
->child
;
4291 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
4293 *lowpc
= min (*lowpc
, low
);
4294 *highpc
= max (*highpc
, high
);
4297 /* If the language does not allow nested subprograms (either inside
4298 subprograms or lexical blocks), we're done. */
4299 if (cu
->language
!= language_ada
)
4302 /* Check all the children of the given DIE. If it contains nested
4303 subprograms, then check their pc bounds. Likewise, we need to
4304 check lexical blocks as well, as they may also contain subprogram
4306 while (child
&& child
->tag
)
4308 if (child
->tag
== DW_TAG_subprogram
4309 || child
->tag
== DW_TAG_lexical_block
)
4310 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
4311 child
= sibling_die (child
);
4315 /* Get the low and high pc's represented by the scope DIE, and store
4316 them in *LOWPC and *HIGHPC. If the correct values can't be
4317 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4320 get_scope_pc_bounds (struct die_info
*die
,
4321 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4322 struct dwarf2_cu
*cu
)
4324 CORE_ADDR best_low
= (CORE_ADDR
) -1;
4325 CORE_ADDR best_high
= (CORE_ADDR
) 0;
4326 CORE_ADDR current_low
, current_high
;
4328 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
4330 best_low
= current_low
;
4331 best_high
= current_high
;
4335 struct die_info
*child
= die
->child
;
4337 while (child
&& child
->tag
)
4339 switch (child
->tag
) {
4340 case DW_TAG_subprogram
:
4341 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
4343 case DW_TAG_namespace
:
4345 /* FIXME: carlton/2004-01-16: Should we do this for
4346 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4347 that current GCC's always emit the DIEs corresponding
4348 to definitions of methods of classes as children of a
4349 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4350 the DIEs giving the declarations, which could be
4351 anywhere). But I don't see any reason why the
4352 standards says that they have to be there. */
4353 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
4355 if (current_low
!= ((CORE_ADDR
) -1))
4357 best_low
= min (best_low
, current_low
);
4358 best_high
= max (best_high
, current_high
);
4366 child
= sibling_die (child
);
4371 *highpc
= best_high
;
4374 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4377 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
4378 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
4380 struct attribute
*attr
;
4382 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4385 CORE_ADDR high
= DW_ADDR (attr
);
4387 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4390 CORE_ADDR low
= DW_ADDR (attr
);
4392 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
4396 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4399 bfd
*obfd
= cu
->objfile
->obfd
;
4401 /* The value of the DW_AT_ranges attribute is the offset of the
4402 address range list in the .debug_ranges section. */
4403 unsigned long offset
= DW_UNSND (attr
);
4404 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4406 /* For some target architectures, but not others, the
4407 read_address function sign-extends the addresses it returns.
4408 To recognize base address selection entries, we need a
4410 unsigned int addr_size
= cu
->header
.addr_size
;
4411 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4413 /* The base address, to which the next pair is relative. Note
4414 that this 'base' is a DWARF concept: most entries in a range
4415 list are relative, to reduce the number of relocs against the
4416 debugging information. This is separate from this function's
4417 'baseaddr' argument, which GDB uses to relocate debugging
4418 information from a shared library based on the address at
4419 which the library was loaded. */
4420 CORE_ADDR base
= cu
->base_address
;
4421 int base_known
= cu
->base_known
;
4423 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
4424 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4426 complaint (&symfile_complaints
,
4427 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4434 unsigned int bytes_read
;
4435 CORE_ADDR start
, end
;
4437 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4438 buffer
+= bytes_read
;
4439 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4440 buffer
+= bytes_read
;
4442 /* Did we find the end of the range list? */
4443 if (start
== 0 && end
== 0)
4446 /* Did we find a base address selection entry? */
4447 else if ((start
& base_select_mask
) == base_select_mask
)
4453 /* We found an ordinary address range. */
4458 complaint (&symfile_complaints
,
4459 _("Invalid .debug_ranges data (no base address)"));
4463 record_block_range (block
,
4464 baseaddr
+ base
+ start
,
4465 baseaddr
+ base
+ end
- 1);
4471 /* Add an aggregate field to the field list. */
4474 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
4475 struct dwarf2_cu
*cu
)
4477 struct objfile
*objfile
= cu
->objfile
;
4478 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4479 struct nextfield
*new_field
;
4480 struct attribute
*attr
;
4482 char *fieldname
= "";
4484 /* Allocate a new field list entry and link it in. */
4485 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
4486 make_cleanup (xfree
, new_field
);
4487 memset (new_field
, 0, sizeof (struct nextfield
));
4489 if (die
->tag
== DW_TAG_inheritance
)
4491 new_field
->next
= fip
->baseclasses
;
4492 fip
->baseclasses
= new_field
;
4496 new_field
->next
= fip
->fields
;
4497 fip
->fields
= new_field
;
4501 /* Handle accessibility and virtuality of field.
4502 The default accessibility for members is public, the default
4503 accessibility for inheritance is private. */
4504 if (die
->tag
!= DW_TAG_inheritance
)
4505 new_field
->accessibility
= DW_ACCESS_public
;
4507 new_field
->accessibility
= DW_ACCESS_private
;
4508 new_field
->virtuality
= DW_VIRTUALITY_none
;
4510 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4512 new_field
->accessibility
= DW_UNSND (attr
);
4513 if (new_field
->accessibility
!= DW_ACCESS_public
)
4514 fip
->non_public_fields
= 1;
4515 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4517 new_field
->virtuality
= DW_UNSND (attr
);
4519 fp
= &new_field
->field
;
4521 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
4523 /* Data member other than a C++ static data member. */
4525 /* Get type of field. */
4526 fp
->type
= die_type (die
, cu
);
4528 SET_FIELD_BITPOS (*fp
, 0);
4530 /* Get bit size of field (zero if none). */
4531 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
4534 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
4538 FIELD_BITSIZE (*fp
) = 0;
4541 /* Get bit offset of field. */
4542 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4545 int byte_offset
= 0;
4547 if (attr_form_is_section_offset (attr
))
4548 dwarf2_complex_location_expr_complaint ();
4549 else if (attr_form_is_constant (attr
))
4550 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4551 else if (attr_form_is_block (attr
))
4552 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4554 dwarf2_complex_location_expr_complaint ();
4556 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4558 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
4561 if (gdbarch_bits_big_endian (gdbarch
))
4563 /* For big endian bits, the DW_AT_bit_offset gives the
4564 additional bit offset from the MSB of the containing
4565 anonymous object to the MSB of the field. We don't
4566 have to do anything special since we don't need to
4567 know the size of the anonymous object. */
4568 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
4572 /* For little endian bits, compute the bit offset to the
4573 MSB of the anonymous object, subtract off the number of
4574 bits from the MSB of the field to the MSB of the
4575 object, and then subtract off the number of bits of
4576 the field itself. The result is the bit offset of
4577 the LSB of the field. */
4579 int bit_offset
= DW_UNSND (attr
);
4581 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4584 /* The size of the anonymous object containing
4585 the bit field is explicit, so use the
4586 indicated size (in bytes). */
4587 anonymous_size
= DW_UNSND (attr
);
4591 /* The size of the anonymous object containing
4592 the bit field must be inferred from the type
4593 attribute of the data member containing the
4595 anonymous_size
= TYPE_LENGTH (fp
->type
);
4597 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
4598 - bit_offset
- FIELD_BITSIZE (*fp
);
4602 /* Get name of field. */
4603 fieldname
= dwarf2_name (die
, cu
);
4604 if (fieldname
== NULL
)
4607 /* The name is already allocated along with this objfile, so we don't
4608 need to duplicate it for the type. */
4609 fp
->name
= fieldname
;
4611 /* Change accessibility for artificial fields (e.g. virtual table
4612 pointer or virtual base class pointer) to private. */
4613 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
4615 FIELD_ARTIFICIAL (*fp
) = 1;
4616 new_field
->accessibility
= DW_ACCESS_private
;
4617 fip
->non_public_fields
= 1;
4620 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4622 /* C++ static member. */
4624 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4625 is a declaration, but all versions of G++ as of this writing
4626 (so through at least 3.2.1) incorrectly generate
4627 DW_TAG_variable tags. */
4631 /* Get name of field. */
4632 fieldname
= dwarf2_name (die
, cu
);
4633 if (fieldname
== NULL
)
4636 /* Get physical name. */
4637 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
4639 /* The name is already allocated along with this objfile, so we don't
4640 need to duplicate it for the type. */
4641 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4642 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4643 FIELD_NAME (*fp
) = fieldname
;
4645 else if (die
->tag
== DW_TAG_inheritance
)
4647 /* C++ base class field. */
4648 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4651 int byte_offset
= 0;
4653 if (attr_form_is_section_offset (attr
))
4654 dwarf2_complex_location_expr_complaint ();
4655 else if (attr_form_is_constant (attr
))
4656 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4657 else if (attr_form_is_block (attr
))
4658 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4660 dwarf2_complex_location_expr_complaint ();
4662 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4664 FIELD_BITSIZE (*fp
) = 0;
4665 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4666 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4667 fip
->nbaseclasses
++;
4671 /* Create the vector of fields, and attach it to the type. */
4674 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4675 struct dwarf2_cu
*cu
)
4677 int nfields
= fip
->nfields
;
4679 /* Record the field count, allocate space for the array of fields,
4680 and create blank accessibility bitfields if necessary. */
4681 TYPE_NFIELDS (type
) = nfields
;
4682 TYPE_FIELDS (type
) = (struct field
*)
4683 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4684 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4686 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
4688 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4690 TYPE_FIELD_PRIVATE_BITS (type
) =
4691 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4692 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4694 TYPE_FIELD_PROTECTED_BITS (type
) =
4695 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4696 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4698 TYPE_FIELD_IGNORE_BITS (type
) =
4699 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4700 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4703 /* If the type has baseclasses, allocate and clear a bit vector for
4704 TYPE_FIELD_VIRTUAL_BITS. */
4705 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
4707 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4708 unsigned char *pointer
;
4710 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4711 pointer
= TYPE_ALLOC (type
, num_bytes
);
4712 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4713 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4714 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4717 /* Copy the saved-up fields into the field vector. Start from the head
4718 of the list, adding to the tail of the field array, so that they end
4719 up in the same order in the array in which they were added to the list. */
4720 while (nfields
-- > 0)
4722 struct nextfield
*fieldp
;
4726 fieldp
= fip
->fields
;
4727 fip
->fields
= fieldp
->next
;
4731 fieldp
= fip
->baseclasses
;
4732 fip
->baseclasses
= fieldp
->next
;
4735 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
4736 switch (fieldp
->accessibility
)
4738 case DW_ACCESS_private
:
4739 if (cu
->language
!= language_ada
)
4740 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4743 case DW_ACCESS_protected
:
4744 if (cu
->language
!= language_ada
)
4745 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4748 case DW_ACCESS_public
:
4752 /* Unknown accessibility. Complain and treat it as public. */
4754 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4755 fieldp
->accessibility
);
4759 if (nfields
< fip
->nbaseclasses
)
4761 switch (fieldp
->virtuality
)
4763 case DW_VIRTUALITY_virtual
:
4764 case DW_VIRTUALITY_pure_virtual
:
4765 if (cu
->language
== language_ada
)
4766 error ("unexpected virtuality in component of Ada type");
4767 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4774 /* Add a member function to the proper fieldlist. */
4777 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4778 struct type
*type
, struct dwarf2_cu
*cu
)
4780 struct objfile
*objfile
= cu
->objfile
;
4781 struct attribute
*attr
;
4782 struct fnfieldlist
*flp
;
4784 struct fn_field
*fnp
;
4787 struct nextfnfield
*new_fnfield
;
4788 struct type
*this_type
;
4790 if (cu
->language
== language_ada
)
4791 error ("unexpected member function in Ada type");
4793 /* Get name of member function. */
4794 fieldname
= dwarf2_name (die
, cu
);
4795 if (fieldname
== NULL
)
4798 /* Get the mangled name. */
4799 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
4801 /* Look up member function name in fieldlist. */
4802 for (i
= 0; i
< fip
->nfnfields
; i
++)
4804 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4808 /* Create new list element if necessary. */
4809 if (i
< fip
->nfnfields
)
4810 flp
= &fip
->fnfieldlists
[i
];
4813 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4815 fip
->fnfieldlists
= (struct fnfieldlist
*)
4816 xrealloc (fip
->fnfieldlists
,
4817 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4818 * sizeof (struct fnfieldlist
));
4819 if (fip
->nfnfields
== 0)
4820 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4822 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4823 flp
->name
= fieldname
;
4829 /* Create a new member function field and chain it to the field list
4831 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4832 make_cleanup (xfree
, new_fnfield
);
4833 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4834 new_fnfield
->next
= flp
->head
;
4835 flp
->head
= new_fnfield
;
4838 /* Fill in the member function field info. */
4839 fnp
= &new_fnfield
->fnfield
;
4840 /* The name is already allocated along with this objfile, so we don't
4841 need to duplicate it for the type. */
4842 fnp
->physname
= physname
? physname
: "";
4843 fnp
->type
= alloc_type (objfile
);
4844 this_type
= read_type_die (die
, cu
);
4845 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4847 int nparams
= TYPE_NFIELDS (this_type
);
4849 /* TYPE is the domain of this method, and THIS_TYPE is the type
4850 of the method itself (TYPE_CODE_METHOD). */
4851 smash_to_method_type (fnp
->type
, type
,
4852 TYPE_TARGET_TYPE (this_type
),
4853 TYPE_FIELDS (this_type
),
4854 TYPE_NFIELDS (this_type
),
4855 TYPE_VARARGS (this_type
));
4857 /* Handle static member functions.
4858 Dwarf2 has no clean way to discern C++ static and non-static
4859 member functions. G++ helps GDB by marking the first
4860 parameter for non-static member functions (which is the
4861 this pointer) as artificial. We obtain this information
4862 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4863 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4864 fnp
->voffset
= VOFFSET_STATIC
;
4867 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4870 /* Get fcontext from DW_AT_containing_type if present. */
4871 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4872 fnp
->fcontext
= die_containing_type (die
, cu
);
4874 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4875 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4877 /* Get accessibility. */
4878 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4881 switch (DW_UNSND (attr
))
4883 case DW_ACCESS_private
:
4884 fnp
->is_private
= 1;
4886 case DW_ACCESS_protected
:
4887 fnp
->is_protected
= 1;
4892 /* Check for artificial methods. */
4893 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4894 if (attr
&& DW_UNSND (attr
) != 0)
4895 fnp
->is_artificial
= 1;
4897 /* Get index in virtual function table if it is a virtual member
4898 function. For older versions of GCC, this is an offset in the
4899 appropriate virtual table, as specified by DW_AT_containing_type.
4900 For everyone else, it is an expression to be evaluated relative
4901 to the object address. */
4903 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4906 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
4908 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
4910 /* Old-style GCC. */
4911 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4913 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
4914 || (DW_BLOCK (attr
)->size
> 1
4915 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
4916 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
4918 struct dwarf_block blk
;
4921 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
4923 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
4924 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
4925 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4926 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
4927 dwarf2_complex_location_expr_complaint ();
4929 fnp
->voffset
/= cu
->header
.addr_size
;
4933 dwarf2_complex_location_expr_complaint ();
4936 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
4938 else if (attr_form_is_section_offset (attr
))
4940 dwarf2_complex_location_expr_complaint ();
4944 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4950 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4951 if (attr
&& DW_UNSND (attr
))
4953 /* GCC does this, as of 2008-08-25; PR debug/37237. */
4954 complaint (&symfile_complaints
,
4955 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
4956 fieldname
, die
->offset
);
4957 TYPE_CPLUS_DYNAMIC (type
) = 1;
4962 /* Create the vector of member function fields, and attach it to the type. */
4965 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
4966 struct dwarf2_cu
*cu
)
4968 struct fnfieldlist
*flp
;
4969 int total_length
= 0;
4972 if (cu
->language
== language_ada
)
4973 error ("unexpected member functions in Ada type");
4975 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4976 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
4977 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
4979 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
4981 struct nextfnfield
*nfp
= flp
->head
;
4982 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
4985 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
4986 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
4987 fn_flp
->fn_fields
= (struct fn_field
*)
4988 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
4989 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
4990 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
4992 total_length
+= flp
->length
;
4995 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
4996 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
4999 /* Returns non-zero if NAME is the name of a vtable member in CU's
5000 language, zero otherwise. */
5002 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
5004 static const char vptr
[] = "_vptr";
5005 static const char vtable
[] = "vtable";
5007 /* Look for the C++ and Java forms of the vtable. */
5008 if ((cu
->language
== language_java
5009 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
5010 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
5011 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
5017 /* GCC outputs unnamed structures that are really pointers to member
5018 functions, with the ABI-specified layout. If TYPE describes
5019 such a structure, smash it into a member function type.
5021 GCC shouldn't do this; it should just output pointer to member DIEs.
5022 This is GCC PR debug/28767. */
5025 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
5027 struct type
*pfn_type
, *domain_type
, *new_type
;
5029 /* Check for a structure with no name and two children. */
5030 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
5033 /* Check for __pfn and __delta members. */
5034 if (TYPE_FIELD_NAME (type
, 0) == NULL
5035 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
5036 || TYPE_FIELD_NAME (type
, 1) == NULL
5037 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
5040 /* Find the type of the method. */
5041 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
5042 if (pfn_type
== NULL
5043 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
5044 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
5047 /* Look for the "this" argument. */
5048 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
5049 if (TYPE_NFIELDS (pfn_type
) == 0
5050 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
5051 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
5054 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
5055 new_type
= alloc_type (objfile
);
5056 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
5057 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
5058 TYPE_VARARGS (pfn_type
));
5059 smash_to_methodptr_type (type
, new_type
);
5062 /* Called when we find the DIE that starts a structure or union scope
5063 (definition) to process all dies that define the members of the
5066 NOTE: we need to call struct_type regardless of whether or not the
5067 DIE has an at_name attribute, since it might be an anonymous
5068 structure or union. This gets the type entered into our set of
5071 However, if the structure is incomplete (an opaque struct/union)
5072 then suppress creating a symbol table entry for it since gdb only
5073 wants to find the one with the complete definition. Note that if
5074 it is complete, we just call new_symbol, which does it's own
5075 checking about whether the struct/union is anonymous or not (and
5076 suppresses creating a symbol table entry itself). */
5078 static struct type
*
5079 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5081 struct objfile
*objfile
= cu
->objfile
;
5083 struct attribute
*attr
;
5085 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5087 /* If the definition of this type lives in .debug_types, read that type.
5088 Don't follow DW_AT_specification though, that will take us back up
5089 the chain and we want to go down. */
5090 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5093 struct dwarf2_cu
*type_cu
= cu
;
5094 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5096 /* We could just recurse on read_structure_type, but we need to call
5097 get_die_type to ensure only one type for this DIE is created.
5098 This is important, for example, because for c++ classes we need
5099 TYPE_NAME set which is only done by new_symbol. Blech. */
5100 type
= read_type_die (type_die
, type_cu
);
5101 return set_die_type (die
, type
, cu
);
5104 type
= alloc_type (objfile
);
5105 INIT_CPLUS_SPECIFIC (type
);
5107 name
= dwarf2_name (die
, cu
);
5110 if (cu
->language
== language_cplus
5111 || cu
->language
== language_java
)
5113 TYPE_TAG_NAME (type
) = (char *) dwarf2_full_name (name
, die
, cu
);
5114 if (die
->tag
== DW_TAG_structure_type
5115 || die
->tag
== DW_TAG_class_type
)
5116 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
5120 /* The name is already allocated along with this objfile, so
5121 we don't need to duplicate it for the type. */
5122 TYPE_TAG_NAME (type
) = (char *) name
;
5123 if (die
->tag
== DW_TAG_class_type
)
5124 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
5128 if (die
->tag
== DW_TAG_structure_type
)
5130 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
5132 else if (die
->tag
== DW_TAG_union_type
)
5134 TYPE_CODE (type
) = TYPE_CODE_UNION
;
5138 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
5141 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
5142 TYPE_DECLARED_CLASS (type
) = 1;
5144 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5147 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5151 TYPE_LENGTH (type
) = 0;
5154 TYPE_STUB_SUPPORTED (type
) = 1;
5155 if (die_is_declaration (die
, cu
))
5156 TYPE_STUB (type
) = 1;
5157 else if (attr
== NULL
&& die
->child
== NULL
5158 && producer_is_realview (cu
->producer
))
5159 /* RealView does not output the required DW_AT_declaration
5160 on incomplete types. */
5161 TYPE_STUB (type
) = 1;
5163 /* We need to add the type field to the die immediately so we don't
5164 infinitely recurse when dealing with pointers to the structure
5165 type within the structure itself. */
5166 set_die_type (die
, type
, cu
);
5168 /* set_die_type should be already done. */
5169 set_descriptive_type (type
, die
, cu
);
5171 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
5173 struct field_info fi
;
5174 struct die_info
*child_die
;
5176 memset (&fi
, 0, sizeof (struct field_info
));
5178 child_die
= die
->child
;
5180 while (child_die
&& child_die
->tag
)
5182 if (child_die
->tag
== DW_TAG_member
5183 || child_die
->tag
== DW_TAG_variable
)
5185 /* NOTE: carlton/2002-11-05: A C++ static data member
5186 should be a DW_TAG_member that is a declaration, but
5187 all versions of G++ as of this writing (so through at
5188 least 3.2.1) incorrectly generate DW_TAG_variable
5189 tags for them instead. */
5190 dwarf2_add_field (&fi
, child_die
, cu
);
5192 else if (child_die
->tag
== DW_TAG_subprogram
)
5194 /* C++ member function. */
5195 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
5197 else if (child_die
->tag
== DW_TAG_inheritance
)
5199 /* C++ base class field. */
5200 dwarf2_add_field (&fi
, child_die
, cu
);
5202 child_die
= sibling_die (child_die
);
5205 /* Attach fields and member functions to the type. */
5207 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
5210 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
5212 /* Get the type which refers to the base class (possibly this
5213 class itself) which contains the vtable pointer for the current
5214 class from the DW_AT_containing_type attribute. This use of
5215 DW_AT_containing_type is a GNU extension. */
5217 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
5219 struct type
*t
= die_containing_type (die
, cu
);
5221 TYPE_VPTR_BASETYPE (type
) = t
;
5226 /* Our own class provides vtbl ptr. */
5227 for (i
= TYPE_NFIELDS (t
) - 1;
5228 i
>= TYPE_N_BASECLASSES (t
);
5231 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
5233 if (is_vtable_name (fieldname
, cu
))
5235 TYPE_VPTR_FIELDNO (type
) = i
;
5240 /* Complain if virtual function table field not found. */
5241 if (i
< TYPE_N_BASECLASSES (t
))
5242 complaint (&symfile_complaints
,
5243 _("virtual function table pointer not found when defining class '%s'"),
5244 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
5249 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
5252 else if (cu
->producer
5253 && strncmp (cu
->producer
,
5254 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5256 /* The IBM XLC compiler does not provide direct indication
5257 of the containing type, but the vtable pointer is
5258 always named __vfp. */
5262 for (i
= TYPE_NFIELDS (type
) - 1;
5263 i
>= TYPE_N_BASECLASSES (type
);
5266 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
5268 TYPE_VPTR_FIELDNO (type
) = i
;
5269 TYPE_VPTR_BASETYPE (type
) = type
;
5277 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
5279 do_cleanups (back_to
);
5284 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5286 struct die_info
*child_die
= die
->child
;
5287 struct type
*this_type
;
5289 this_type
= get_die_type (die
, cu
);
5290 if (this_type
== NULL
)
5291 this_type
= read_structure_type (die
, cu
);
5293 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5294 snapshots) has been known to create a die giving a declaration
5295 for a class that has, as a child, a die giving a definition for a
5296 nested class. So we have to process our children even if the
5297 current die is a declaration. Normally, of course, a declaration
5298 won't have any children at all. */
5300 while (child_die
!= NULL
&& child_die
->tag
)
5302 if (child_die
->tag
== DW_TAG_member
5303 || child_die
->tag
== DW_TAG_variable
5304 || child_die
->tag
== DW_TAG_inheritance
)
5309 process_die (child_die
, cu
);
5311 child_die
= sibling_die (child_die
);
5314 /* Do not consider external references. According to the DWARF standard,
5315 these DIEs are identified by the fact that they have no byte_size
5316 attribute, and a declaration attribute. */
5317 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
5318 || !die_is_declaration (die
, cu
))
5319 new_symbol (die
, this_type
, cu
);
5322 /* Given a DW_AT_enumeration_type die, set its type. We do not
5323 complete the type's fields yet, or create any symbols. */
5325 static struct type
*
5326 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5328 struct objfile
*objfile
= cu
->objfile
;
5330 struct attribute
*attr
;
5333 /* If the definition of this type lives in .debug_types, read that type.
5334 Don't follow DW_AT_specification though, that will take us back up
5335 the chain and we want to go down. */
5336 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5339 struct dwarf2_cu
*type_cu
= cu
;
5340 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5342 type
= read_type_die (type_die
, type_cu
);
5343 return set_die_type (die
, type
, cu
);
5346 type
= alloc_type (objfile
);
5348 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
5349 name
= dwarf2_full_name (NULL
, die
, cu
);
5351 TYPE_TAG_NAME (type
) = (char *) name
;
5353 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5356 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5360 TYPE_LENGTH (type
) = 0;
5363 /* The enumeration DIE can be incomplete. In Ada, any type can be
5364 declared as private in the package spec, and then defined only
5365 inside the package body. Such types are known as Taft Amendment
5366 Types. When another package uses such a type, an incomplete DIE
5367 may be generated by the compiler. */
5368 if (die_is_declaration (die
, cu
))
5369 TYPE_STUB (type
) = 1;
5371 return set_die_type (die
, type
, cu
);
5374 /* Given a pointer to a die which begins an enumeration, process all
5375 the dies that define the members of the enumeration, and create the
5376 symbol for the enumeration type.
5378 NOTE: We reverse the order of the element list. */
5381 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5383 struct die_info
*child_die
;
5384 struct field
*fields
;
5387 int unsigned_enum
= 1;
5389 struct type
*this_type
;
5393 this_type
= get_die_type (die
, cu
);
5394 if (this_type
== NULL
)
5395 this_type
= read_enumeration_type (die
, cu
);
5396 if (die
->child
!= NULL
)
5398 child_die
= die
->child
;
5399 while (child_die
&& child_die
->tag
)
5401 if (child_die
->tag
!= DW_TAG_enumerator
)
5403 process_die (child_die
, cu
);
5407 name
= dwarf2_name (child_die
, cu
);
5410 sym
= new_symbol (child_die
, this_type
, cu
);
5411 if (SYMBOL_VALUE (sym
) < 0)
5414 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
5416 fields
= (struct field
*)
5418 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
5419 * sizeof (struct field
));
5422 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
5423 FIELD_TYPE (fields
[num_fields
]) = NULL
;
5424 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
5425 FIELD_BITSIZE (fields
[num_fields
]) = 0;
5431 child_die
= sibling_die (child_die
);
5436 TYPE_NFIELDS (this_type
) = num_fields
;
5437 TYPE_FIELDS (this_type
) = (struct field
*)
5438 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
5439 memcpy (TYPE_FIELDS (this_type
), fields
,
5440 sizeof (struct field
) * num_fields
);
5444 TYPE_UNSIGNED (this_type
) = 1;
5447 new_symbol (die
, this_type
, cu
);
5450 /* Extract all information from a DW_TAG_array_type DIE and put it in
5451 the DIE's type field. For now, this only handles one dimensional
5454 static struct type
*
5455 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5457 struct objfile
*objfile
= cu
->objfile
;
5458 struct die_info
*child_die
;
5460 struct type
*element_type
, *range_type
, *index_type
;
5461 struct type
**range_types
= NULL
;
5462 struct attribute
*attr
;
5464 struct cleanup
*back_to
;
5467 element_type
= die_type (die
, cu
);
5469 /* The die_type call above may have already set the type for this DIE. */
5470 type
= get_die_type (die
, cu
);
5474 /* Irix 6.2 native cc creates array types without children for
5475 arrays with unspecified length. */
5476 if (die
->child
== NULL
)
5478 index_type
= objfile_type (objfile
)->builtin_int
;
5479 range_type
= create_range_type (NULL
, index_type
, 0, -1);
5480 type
= create_array_type (NULL
, element_type
, range_type
);
5481 return set_die_type (die
, type
, cu
);
5484 back_to
= make_cleanup (null_cleanup
, NULL
);
5485 child_die
= die
->child
;
5486 while (child_die
&& child_die
->tag
)
5488 if (child_die
->tag
== DW_TAG_subrange_type
)
5490 struct type
*child_type
= read_type_die (child_die
, cu
);
5492 if (child_type
!= NULL
)
5494 /* The range type was succesfully read. Save it for
5495 the array type creation. */
5496 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
5498 range_types
= (struct type
**)
5499 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
5500 * sizeof (struct type
*));
5502 make_cleanup (free_current_contents
, &range_types
);
5504 range_types
[ndim
++] = child_type
;
5507 child_die
= sibling_die (child_die
);
5510 /* Dwarf2 dimensions are output from left to right, create the
5511 necessary array types in backwards order. */
5513 type
= element_type
;
5515 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
5520 type
= create_array_type (NULL
, type
, range_types
[i
++]);
5525 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
5528 /* Understand Dwarf2 support for vector types (like they occur on
5529 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5530 array type. This is not part of the Dwarf2/3 standard yet, but a
5531 custom vendor extension. The main difference between a regular
5532 array and the vector variant is that vectors are passed by value
5534 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
5536 make_vector_type (type
);
5538 name
= dwarf2_name (die
, cu
);
5540 TYPE_NAME (type
) = name
;
5542 /* Install the type in the die. */
5543 set_die_type (die
, type
, cu
);
5545 /* set_die_type should be already done. */
5546 set_descriptive_type (type
, die
, cu
);
5548 do_cleanups (back_to
);
5553 static enum dwarf_array_dim_ordering
5554 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
5556 struct attribute
*attr
;
5558 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
5560 if (attr
) return DW_SND (attr
);
5563 GNU F77 is a special case, as at 08/2004 array type info is the
5564 opposite order to the dwarf2 specification, but data is still
5565 laid out as per normal fortran.
5567 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5571 if (cu
->language
== language_fortran
5572 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
5574 return DW_ORD_row_major
;
5577 switch (cu
->language_defn
->la_array_ordering
)
5579 case array_column_major
:
5580 return DW_ORD_col_major
;
5581 case array_row_major
:
5583 return DW_ORD_row_major
;
5587 /* Extract all information from a DW_TAG_set_type DIE and put it in
5588 the DIE's type field. */
5590 static struct type
*
5591 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5593 struct type
*domain_type
, *set_type
;
5594 struct attribute
*attr
;
5596 domain_type
= die_type (die
, cu
);
5598 /* The die_type call above may have already set the type for this DIE. */
5599 set_type
= get_die_type (die
, cu
);
5603 set_type
= create_set_type (NULL
, domain_type
);
5605 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5607 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
5609 return set_die_type (die
, set_type
, cu
);
5612 /* First cut: install each common block member as a global variable. */
5615 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
5617 struct die_info
*child_die
;
5618 struct attribute
*attr
;
5620 CORE_ADDR base
= (CORE_ADDR
) 0;
5622 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
5625 /* Support the .debug_loc offsets */
5626 if (attr_form_is_block (attr
))
5628 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5630 else if (attr_form_is_section_offset (attr
))
5632 dwarf2_complex_location_expr_complaint ();
5636 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5637 "common block member");
5640 if (die
->child
!= NULL
)
5642 child_die
= die
->child
;
5643 while (child_die
&& child_die
->tag
)
5645 sym
= new_symbol (child_die
, NULL
, cu
);
5646 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5649 CORE_ADDR byte_offset
= 0;
5651 if (attr_form_is_section_offset (attr
))
5652 dwarf2_complex_location_expr_complaint ();
5653 else if (attr_form_is_constant (attr
))
5654 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
5655 else if (attr_form_is_block (attr
))
5656 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
5658 dwarf2_complex_location_expr_complaint ();
5660 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
5661 add_symbol_to_list (sym
, &global_symbols
);
5663 child_die
= sibling_die (child_die
);
5668 /* Create a type for a C++ namespace. */
5670 static struct type
*
5671 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5673 struct objfile
*objfile
= cu
->objfile
;
5674 const char *previous_prefix
, *name
;
5678 /* For extensions, reuse the type of the original namespace. */
5679 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5681 struct die_info
*ext_die
;
5682 struct dwarf2_cu
*ext_cu
= cu
;
5684 ext_die
= dwarf2_extension (die
, &ext_cu
);
5685 type
= read_type_die (ext_die
, ext_cu
);
5686 return set_die_type (die
, type
, cu
);
5689 name
= namespace_name (die
, &is_anonymous
, cu
);
5691 /* Now build the name of the current namespace. */
5693 previous_prefix
= determine_prefix (die
, cu
);
5694 if (previous_prefix
[0] != '\0')
5695 name
= typename_concat (&objfile
->objfile_obstack
,
5696 previous_prefix
, name
, 0, cu
);
5698 /* Create the type. */
5699 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5701 TYPE_NAME (type
) = (char *) name
;
5702 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5704 return set_die_type (die
, type
, cu
);
5707 /* Read a C++ namespace. */
5710 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5712 struct objfile
*objfile
= cu
->objfile
;
5716 /* Add a symbol associated to this if we haven't seen the namespace
5717 before. Also, add a using directive if it's an anonymous
5720 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5724 type
= read_type_die (die
, cu
);
5725 new_symbol (die
, type
, cu
);
5727 name
= namespace_name (die
, &is_anonymous
, cu
);
5730 const char *previous_prefix
= determine_prefix (die
, cu
);
5732 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
5733 NULL
, &objfile
->objfile_obstack
);
5737 if (die
->child
!= NULL
)
5739 struct die_info
*child_die
= die
->child
;
5741 while (child_die
&& child_die
->tag
)
5743 process_die (child_die
, cu
);
5744 child_die
= sibling_die (child_die
);
5749 /* Read a Fortran module as type. This DIE can be only a declaration used for
5750 imported module. Still we need that type as local Fortran "use ... only"
5751 declaration imports depend on the created type in determine_prefix. */
5753 static struct type
*
5754 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5756 struct objfile
*objfile
= cu
->objfile
;
5760 module_name
= dwarf2_name (die
, cu
);
5762 complaint (&symfile_complaints
, _("DW_TAG_module has no name, offset 0x%x"),
5764 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
5766 /* determine_prefix uses TYPE_TAG_NAME. */
5767 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5769 return set_die_type (die
, type
, cu
);
5772 /* Read a Fortran module. */
5775 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5777 struct die_info
*child_die
= die
->child
;
5779 while (child_die
&& child_die
->tag
)
5781 process_die (child_die
, cu
);
5782 child_die
= sibling_die (child_die
);
5786 /* Return the name of the namespace represented by DIE. Set
5787 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5791 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5793 struct die_info
*current_die
;
5794 const char *name
= NULL
;
5796 /* Loop through the extensions until we find a name. */
5798 for (current_die
= die
;
5799 current_die
!= NULL
;
5800 current_die
= dwarf2_extension (die
, &cu
))
5802 name
= dwarf2_name (current_die
, cu
);
5807 /* Is it an anonymous namespace? */
5809 *is_anonymous
= (name
== NULL
);
5811 name
= "(anonymous namespace)";
5816 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5817 the user defined type vector. */
5819 static struct type
*
5820 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5822 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5823 struct comp_unit_head
*cu_header
= &cu
->header
;
5825 struct attribute
*attr_byte_size
;
5826 struct attribute
*attr_address_class
;
5827 int byte_size
, addr_class
;
5828 struct type
*target_type
;
5830 target_type
= die_type (die
, cu
);
5832 /* The die_type call above may have already set the type for this DIE. */
5833 type
= get_die_type (die
, cu
);
5837 type
= lookup_pointer_type (target_type
);
5839 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5841 byte_size
= DW_UNSND (attr_byte_size
);
5843 byte_size
= cu_header
->addr_size
;
5845 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5846 if (attr_address_class
)
5847 addr_class
= DW_UNSND (attr_address_class
);
5849 addr_class
= DW_ADDR_none
;
5851 /* If the pointer size or address class is different than the
5852 default, create a type variant marked as such and set the
5853 length accordingly. */
5854 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5856 if (gdbarch_address_class_type_flags_p (gdbarch
))
5860 type_flags
= gdbarch_address_class_type_flags
5861 (gdbarch
, byte_size
, addr_class
);
5862 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5864 type
= make_type_with_address_space (type
, type_flags
);
5866 else if (TYPE_LENGTH (type
) != byte_size
)
5868 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5872 /* Should we also complain about unhandled address classes? */
5876 TYPE_LENGTH (type
) = byte_size
;
5877 return set_die_type (die
, type
, cu
);
5880 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5881 the user defined type vector. */
5883 static struct type
*
5884 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5887 struct type
*to_type
;
5888 struct type
*domain
;
5890 to_type
= die_type (die
, cu
);
5891 domain
= die_containing_type (die
, cu
);
5893 /* The calls above may have already set the type for this DIE. */
5894 type
= get_die_type (die
, cu
);
5898 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5899 type
= lookup_methodptr_type (to_type
);
5901 type
= lookup_memberptr_type (to_type
, domain
);
5903 return set_die_type (die
, type
, cu
);
5906 /* Extract all information from a DW_TAG_reference_type DIE and add to
5907 the user defined type vector. */
5909 static struct type
*
5910 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5912 struct comp_unit_head
*cu_header
= &cu
->header
;
5913 struct type
*type
, *target_type
;
5914 struct attribute
*attr
;
5916 target_type
= die_type (die
, cu
);
5918 /* The die_type call above may have already set the type for this DIE. */
5919 type
= get_die_type (die
, cu
);
5923 type
= lookup_reference_type (target_type
);
5924 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5927 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5931 TYPE_LENGTH (type
) = cu_header
->addr_size
;
5933 return set_die_type (die
, type
, cu
);
5936 static struct type
*
5937 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5939 struct type
*base_type
, *cv_type
;
5941 base_type
= die_type (die
, cu
);
5943 /* The die_type call above may have already set the type for this DIE. */
5944 cv_type
= get_die_type (die
, cu
);
5948 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
5949 return set_die_type (die
, cv_type
, cu
);
5952 static struct type
*
5953 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5955 struct type
*base_type
, *cv_type
;
5957 base_type
= die_type (die
, cu
);
5959 /* The die_type call above may have already set the type for this DIE. */
5960 cv_type
= get_die_type (die
, cu
);
5964 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
5965 return set_die_type (die
, cv_type
, cu
);
5968 /* Extract all information from a DW_TAG_string_type DIE and add to
5969 the user defined type vector. It isn't really a user defined type,
5970 but it behaves like one, with other DIE's using an AT_user_def_type
5971 attribute to reference it. */
5973 static struct type
*
5974 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5976 struct objfile
*objfile
= cu
->objfile
;
5977 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5978 struct type
*type
, *range_type
, *index_type
, *char_type
;
5979 struct attribute
*attr
;
5980 unsigned int length
;
5982 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
5985 length
= DW_UNSND (attr
);
5989 /* check for the DW_AT_byte_size attribute */
5990 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5993 length
= DW_UNSND (attr
);
6001 index_type
= objfile_type (objfile
)->builtin_int
;
6002 range_type
= create_range_type (NULL
, index_type
, 1, length
);
6003 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
6004 type
= create_string_type (NULL
, char_type
, range_type
);
6006 return set_die_type (die
, type
, cu
);
6009 /* Handle DIES due to C code like:
6013 int (*funcp)(int a, long l);
6017 ('funcp' generates a DW_TAG_subroutine_type DIE)
6020 static struct type
*
6021 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6023 struct type
*type
; /* Type that this function returns */
6024 struct type
*ftype
; /* Function that returns above type */
6025 struct attribute
*attr
;
6027 type
= die_type (die
, cu
);
6029 /* The die_type call above may have already set the type for this DIE. */
6030 ftype
= get_die_type (die
, cu
);
6034 ftype
= lookup_function_type (type
);
6036 /* All functions in C++, Pascal and Java have prototypes. */
6037 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
6038 if ((attr
&& (DW_UNSND (attr
) != 0))
6039 || cu
->language
== language_cplus
6040 || cu
->language
== language_java
6041 || cu
->language
== language_pascal
)
6042 TYPE_PROTOTYPED (ftype
) = 1;
6043 else if (producer_is_realview (cu
->producer
))
6044 /* RealView does not emit DW_AT_prototyped. We can not
6045 distinguish prototyped and unprototyped functions; default to
6046 prototyped, since that is more common in modern code (and
6047 RealView warns about unprototyped functions). */
6048 TYPE_PROTOTYPED (ftype
) = 1;
6050 /* Store the calling convention in the type if it's available in
6051 the subroutine die. Otherwise set the calling convention to
6052 the default value DW_CC_normal. */
6053 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
6054 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
6056 /* We need to add the subroutine type to the die immediately so
6057 we don't infinitely recurse when dealing with parameters
6058 declared as the same subroutine type. */
6059 set_die_type (die
, ftype
, cu
);
6061 if (die
->child
!= NULL
)
6063 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
6064 struct die_info
*child_die
;
6065 int nparams
, iparams
;
6067 /* Count the number of parameters.
6068 FIXME: GDB currently ignores vararg functions, but knows about
6069 vararg member functions. */
6071 child_die
= die
->child
;
6072 while (child_die
&& child_die
->tag
)
6074 if (child_die
->tag
== DW_TAG_formal_parameter
)
6076 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
6077 TYPE_VARARGS (ftype
) = 1;
6078 child_die
= sibling_die (child_die
);
6081 /* Allocate storage for parameters and fill them in. */
6082 TYPE_NFIELDS (ftype
) = nparams
;
6083 TYPE_FIELDS (ftype
) = (struct field
*)
6084 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
6086 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
6087 even if we error out during the parameters reading below. */
6088 for (iparams
= 0; iparams
< nparams
; iparams
++)
6089 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
6092 child_die
= die
->child
;
6093 while (child_die
&& child_die
->tag
)
6095 if (child_die
->tag
== DW_TAG_formal_parameter
)
6097 /* Dwarf2 has no clean way to discern C++ static and non-static
6098 member functions. G++ helps GDB by marking the first
6099 parameter for non-static member functions (which is the
6100 this pointer) as artificial. We pass this information
6101 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
6102 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
6104 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
6107 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
6109 /* GCC/43521: In java, the formal parameter
6110 "this" is sometimes not marked with DW_AT_artificial. */
6111 if (cu
->language
== language_java
)
6113 const char *name
= dwarf2_name (child_die
, cu
);
6115 if (name
&& !strcmp (name
, "this"))
6116 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
6119 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
6122 child_die
= sibling_die (child_die
);
6129 static struct type
*
6130 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
6132 struct objfile
*objfile
= cu
->objfile
;
6133 const char *name
= NULL
;
6134 struct type
*this_type
;
6136 name
= dwarf2_full_name (NULL
, die
, cu
);
6137 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
6138 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
6139 TYPE_NAME (this_type
) = (char *) name
;
6140 set_die_type (die
, this_type
, cu
);
6141 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
6145 /* Find a representation of a given base type and install
6146 it in the TYPE field of the die. */
6148 static struct type
*
6149 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6151 struct objfile
*objfile
= cu
->objfile
;
6153 struct attribute
*attr
;
6154 int encoding
= 0, size
= 0;
6156 enum type_code code
= TYPE_CODE_INT
;
6158 struct type
*target_type
= NULL
;
6160 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
6163 encoding
= DW_UNSND (attr
);
6165 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6168 size
= DW_UNSND (attr
);
6170 name
= dwarf2_name (die
, cu
);
6173 complaint (&symfile_complaints
,
6174 _("DW_AT_name missing from DW_TAG_base_type"));
6179 case DW_ATE_address
:
6180 /* Turn DW_ATE_address into a void * pointer. */
6181 code
= TYPE_CODE_PTR
;
6182 type_flags
|= TYPE_FLAG_UNSIGNED
;
6183 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
6185 case DW_ATE_boolean
:
6186 code
= TYPE_CODE_BOOL
;
6187 type_flags
|= TYPE_FLAG_UNSIGNED
;
6189 case DW_ATE_complex_float
:
6190 code
= TYPE_CODE_COMPLEX
;
6191 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
6193 case DW_ATE_decimal_float
:
6194 code
= TYPE_CODE_DECFLOAT
;
6197 code
= TYPE_CODE_FLT
;
6201 case DW_ATE_unsigned
:
6202 type_flags
|= TYPE_FLAG_UNSIGNED
;
6204 case DW_ATE_signed_char
:
6205 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6206 || cu
->language
== language_pascal
)
6207 code
= TYPE_CODE_CHAR
;
6209 case DW_ATE_unsigned_char
:
6210 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6211 || cu
->language
== language_pascal
)
6212 code
= TYPE_CODE_CHAR
;
6213 type_flags
|= TYPE_FLAG_UNSIGNED
;
6216 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
6217 dwarf_type_encoding_name (encoding
));
6221 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
6222 TYPE_NAME (type
) = name
;
6223 TYPE_TARGET_TYPE (type
) = target_type
;
6225 if (name
&& strcmp (name
, "char") == 0)
6226 TYPE_NOSIGN (type
) = 1;
6228 return set_die_type (die
, type
, cu
);
6231 /* Read the given DW_AT_subrange DIE. */
6233 static struct type
*
6234 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6236 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
6237 struct type
*base_type
;
6238 struct type
*range_type
;
6239 struct attribute
*attr
;
6243 LONGEST negative_mask
;
6245 base_type
= die_type (die
, cu
);
6247 /* The die_type call above may have already set the type for this DIE. */
6248 range_type
= get_die_type (die
, cu
);
6252 if (cu
->language
== language_fortran
)
6254 /* FORTRAN implies a lower bound of 1, if not given. */
6258 /* FIXME: For variable sized arrays either of these could be
6259 a variable rather than a constant value. We'll allow it,
6260 but we don't know how to handle it. */
6261 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
6263 low
= dwarf2_get_attr_constant_value (attr
, 0);
6265 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
6268 if (attr
->form
== DW_FORM_block1
|| is_ref_attr (attr
))
6270 /* GCC encodes arrays with unspecified or dynamic length
6271 with a DW_FORM_block1 attribute or a reference attribute.
6272 FIXME: GDB does not yet know how to handle dynamic
6273 arrays properly, treat them as arrays with unspecified
6276 FIXME: jimb/2003-09-22: GDB does not really know
6277 how to handle arrays of unspecified length
6278 either; we just represent them as zero-length
6279 arrays. Choose an appropriate upper bound given
6280 the lower bound we've computed above. */
6284 high
= dwarf2_get_attr_constant_value (attr
, 1);
6288 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
6291 int count
= dwarf2_get_attr_constant_value (attr
, 1);
6292 high
= low
+ count
- 1;
6296 /* Dwarf-2 specifications explicitly allows to create subrange types
6297 without specifying a base type.
6298 In that case, the base type must be set to the type of
6299 the lower bound, upper bound or count, in that order, if any of these
6300 three attributes references an object that has a type.
6301 If no base type is found, the Dwarf-2 specifications say that
6302 a signed integer type of size equal to the size of an address should
6304 For the following C code: `extern char gdb_int [];'
6305 GCC produces an empty range DIE.
6306 FIXME: muller/2010-05-28: Possible references to object for low bound,
6307 high bound or count are not yet handled by this code.
6309 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
6311 struct objfile
*objfile
= cu
->objfile
;
6312 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6313 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
6314 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
6316 /* Test "int", "long int", and "long long int" objfile types,
6317 and select the first one having a size above or equal to the
6318 architecture address size. */
6319 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
6320 base_type
= int_type
;
6323 int_type
= objfile_type (objfile
)->builtin_long
;
6324 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
6325 base_type
= int_type
;
6328 int_type
= objfile_type (objfile
)->builtin_long_long
;
6329 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
6330 base_type
= int_type
;
6336 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
6337 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
6338 low
|= negative_mask
;
6339 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
6340 high
|= negative_mask
;
6342 range_type
= create_range_type (NULL
, base_type
, low
, high
);
6344 /* Mark arrays with dynamic length at least as an array of unspecified
6345 length. GDB could check the boundary but before it gets implemented at
6346 least allow accessing the array elements. */
6347 if (attr
&& attr
->form
== DW_FORM_block1
)
6348 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
6350 name
= dwarf2_name (die
, cu
);
6352 TYPE_NAME (range_type
) = name
;
6354 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6356 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
6358 set_die_type (die
, range_type
, cu
);
6360 /* set_die_type should be already done. */
6361 set_descriptive_type (range_type
, die
, cu
);
6366 static struct type
*
6367 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6371 /* For now, we only support the C meaning of an unspecified type: void. */
6373 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
6374 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
6376 return set_die_type (die
, type
, cu
);
6379 /* Trivial hash function for die_info: the hash value of a DIE
6380 is its offset in .debug_info for this objfile. */
6383 die_hash (const void *item
)
6385 const struct die_info
*die
= item
;
6390 /* Trivial comparison function for die_info structures: two DIEs
6391 are equal if they have the same offset. */
6394 die_eq (const void *item_lhs
, const void *item_rhs
)
6396 const struct die_info
*die_lhs
= item_lhs
;
6397 const struct die_info
*die_rhs
= item_rhs
;
6399 return die_lhs
->offset
== die_rhs
->offset
;
6402 /* Read a whole compilation unit into a linked list of dies. */
6404 static struct die_info
*
6405 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6407 struct die_reader_specs reader_specs
;
6409 gdb_assert (cu
->die_hash
== NULL
);
6411 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6415 &cu
->comp_unit_obstack
,
6416 hashtab_obstack_allocate
,
6417 dummy_obstack_deallocate
);
6419 init_cu_die_reader (&reader_specs
, cu
);
6421 return read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
6424 /* Main entry point for reading a DIE and all children.
6425 Read the DIE and dump it if requested. */
6427 static struct die_info
*
6428 read_die_and_children (const struct die_reader_specs
*reader
,
6430 gdb_byte
**new_info_ptr
,
6431 struct die_info
*parent
)
6433 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
6434 new_info_ptr
, parent
);
6436 if (dwarf2_die_debug
)
6438 fprintf_unfiltered (gdb_stdlog
,
6439 "\nRead die from %s of %s:\n",
6440 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
6442 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
6444 : "unknown section",
6445 reader
->abfd
->filename
);
6446 dump_die (result
, dwarf2_die_debug
);
6452 /* Read a single die and all its descendents. Set the die's sibling
6453 field to NULL; set other fields in the die correctly, and set all
6454 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6455 location of the info_ptr after reading all of those dies. PARENT
6456 is the parent of the die in question. */
6458 static struct die_info
*
6459 read_die_and_children_1 (const struct die_reader_specs
*reader
,
6461 gdb_byte
**new_info_ptr
,
6462 struct die_info
*parent
)
6464 struct die_info
*die
;
6468 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
6471 *new_info_ptr
= cur_ptr
;
6474 store_in_ref_table (die
, reader
->cu
);
6477 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
6481 *new_info_ptr
= cur_ptr
;
6484 die
->sibling
= NULL
;
6485 die
->parent
= parent
;
6489 /* Read a die, all of its descendents, and all of its siblings; set
6490 all of the fields of all of the dies correctly. Arguments are as
6491 in read_die_and_children. */
6493 static struct die_info
*
6494 read_die_and_siblings (const struct die_reader_specs
*reader
,
6496 gdb_byte
**new_info_ptr
,
6497 struct die_info
*parent
)
6499 struct die_info
*first_die
, *last_sibling
;
6503 first_die
= last_sibling
= NULL
;
6507 struct die_info
*die
6508 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
6512 *new_info_ptr
= cur_ptr
;
6519 last_sibling
->sibling
= die
;
6525 /* Read the die from the .debug_info section buffer. Set DIEP to
6526 point to a newly allocated die with its information, except for its
6527 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6528 whether the die has children or not. */
6531 read_full_die (const struct die_reader_specs
*reader
,
6532 struct die_info
**diep
, gdb_byte
*info_ptr
,
6535 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6536 struct abbrev_info
*abbrev
;
6537 struct die_info
*die
;
6538 struct dwarf2_cu
*cu
= reader
->cu
;
6539 bfd
*abfd
= reader
->abfd
;
6541 offset
= info_ptr
- reader
->buffer
;
6542 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6543 info_ptr
+= bytes_read
;
6551 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6553 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6555 bfd_get_filename (abfd
));
6557 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6558 die
->offset
= offset
;
6559 die
->tag
= abbrev
->tag
;
6560 die
->abbrev
= abbrev_number
;
6562 die
->num_attrs
= abbrev
->num_attrs
;
6564 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6565 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6566 abfd
, info_ptr
, cu
);
6569 *has_children
= abbrev
->has_children
;
6573 /* In DWARF version 2, the description of the debugging information is
6574 stored in a separate .debug_abbrev section. Before we read any
6575 dies from a section we read in all abbreviations and install them
6576 in a hash table. This function also sets flags in CU describing
6577 the data found in the abbrev table. */
6580 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
6582 struct comp_unit_head
*cu_header
= &cu
->header
;
6583 gdb_byte
*abbrev_ptr
;
6584 struct abbrev_info
*cur_abbrev
;
6585 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
6586 unsigned int abbrev_form
, hash_number
;
6587 struct attr_abbrev
*cur_attrs
;
6588 unsigned int allocated_attrs
;
6590 /* Initialize dwarf2 abbrevs */
6591 obstack_init (&cu
->abbrev_obstack
);
6592 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
6594 * sizeof (struct abbrev_info
*)));
6595 memset (cu
->dwarf2_abbrevs
, 0,
6596 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
6598 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
6599 &dwarf2_per_objfile
->abbrev
);
6600 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
6601 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6602 abbrev_ptr
+= bytes_read
;
6604 allocated_attrs
= ATTR_ALLOC_CHUNK
;
6605 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
6607 /* loop until we reach an abbrev number of 0 */
6608 while (abbrev_number
)
6610 cur_abbrev
= dwarf_alloc_abbrev (cu
);
6612 /* read in abbrev header */
6613 cur_abbrev
->number
= abbrev_number
;
6614 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6615 abbrev_ptr
+= bytes_read
;
6616 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
6619 if (cur_abbrev
->tag
== DW_TAG_namespace
)
6620 cu
->has_namespace_info
= 1;
6622 /* now read in declarations */
6623 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6624 abbrev_ptr
+= bytes_read
;
6625 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6626 abbrev_ptr
+= bytes_read
;
6629 if (cur_abbrev
->num_attrs
== allocated_attrs
)
6631 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
6633 = xrealloc (cur_attrs
, (allocated_attrs
6634 * sizeof (struct attr_abbrev
)));
6637 /* Record whether this compilation unit might have
6638 inter-compilation-unit references. If we don't know what form
6639 this attribute will have, then it might potentially be a
6640 DW_FORM_ref_addr, so we conservatively expect inter-CU
6643 if (abbrev_form
== DW_FORM_ref_addr
6644 || abbrev_form
== DW_FORM_indirect
)
6645 cu
->has_form_ref_addr
= 1;
6647 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
6648 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
6649 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6650 abbrev_ptr
+= bytes_read
;
6651 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6652 abbrev_ptr
+= bytes_read
;
6655 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
6656 (cur_abbrev
->num_attrs
6657 * sizeof (struct attr_abbrev
)));
6658 memcpy (cur_abbrev
->attrs
, cur_attrs
,
6659 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
6661 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
6662 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
6663 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
6665 /* Get next abbreviation.
6666 Under Irix6 the abbreviations for a compilation unit are not
6667 always properly terminated with an abbrev number of 0.
6668 Exit loop if we encounter an abbreviation which we have
6669 already read (which means we are about to read the abbreviations
6670 for the next compile unit) or if the end of the abbreviation
6671 table is reached. */
6672 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
6673 >= dwarf2_per_objfile
->abbrev
.size
)
6675 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6676 abbrev_ptr
+= bytes_read
;
6677 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
6684 /* Release the memory used by the abbrev table for a compilation unit. */
6687 dwarf2_free_abbrev_table (void *ptr_to_cu
)
6689 struct dwarf2_cu
*cu
= ptr_to_cu
;
6691 obstack_free (&cu
->abbrev_obstack
, NULL
);
6692 cu
->dwarf2_abbrevs
= NULL
;
6695 /* Lookup an abbrev_info structure in the abbrev hash table. */
6697 static struct abbrev_info
*
6698 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
6700 unsigned int hash_number
;
6701 struct abbrev_info
*abbrev
;
6703 hash_number
= number
% ABBREV_HASH_SIZE
;
6704 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
6708 if (abbrev
->number
== number
)
6711 abbrev
= abbrev
->next
;
6716 /* Returns nonzero if TAG represents a type that we might generate a partial
6720 is_type_tag_for_partial (int tag
)
6725 /* Some types that would be reasonable to generate partial symbols for,
6726 that we don't at present. */
6727 case DW_TAG_array_type
:
6728 case DW_TAG_file_type
:
6729 case DW_TAG_ptr_to_member_type
:
6730 case DW_TAG_set_type
:
6731 case DW_TAG_string_type
:
6732 case DW_TAG_subroutine_type
:
6734 case DW_TAG_base_type
:
6735 case DW_TAG_class_type
:
6736 case DW_TAG_interface_type
:
6737 case DW_TAG_enumeration_type
:
6738 case DW_TAG_structure_type
:
6739 case DW_TAG_subrange_type
:
6740 case DW_TAG_typedef
:
6741 case DW_TAG_union_type
:
6748 /* Load all DIEs that are interesting for partial symbols into memory. */
6750 static struct partial_die_info
*
6751 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6752 int building_psymtab
, struct dwarf2_cu
*cu
)
6754 struct partial_die_info
*part_die
;
6755 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
6756 struct abbrev_info
*abbrev
;
6757 unsigned int bytes_read
;
6758 unsigned int load_all
= 0;
6760 int nesting_level
= 1;
6765 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
6769 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6773 &cu
->comp_unit_obstack
,
6774 hashtab_obstack_allocate
,
6775 dummy_obstack_deallocate
);
6777 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6778 sizeof (struct partial_die_info
));
6782 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6784 /* A NULL abbrev means the end of a series of children. */
6787 if (--nesting_level
== 0)
6789 /* PART_DIE was probably the last thing allocated on the
6790 comp_unit_obstack, so we could call obstack_free
6791 here. We don't do that because the waste is small,
6792 and will be cleaned up when we're done with this
6793 compilation unit. This way, we're also more robust
6794 against other users of the comp_unit_obstack. */
6797 info_ptr
+= bytes_read
;
6798 last_die
= parent_die
;
6799 parent_die
= parent_die
->die_parent
;
6803 /* Check whether this DIE is interesting enough to save. Normally
6804 we would not be interested in members here, but there may be
6805 later variables referencing them via DW_AT_specification (for
6808 && !is_type_tag_for_partial (abbrev
->tag
)
6809 && abbrev
->tag
!= DW_TAG_enumerator
6810 && abbrev
->tag
!= DW_TAG_subprogram
6811 && abbrev
->tag
!= DW_TAG_lexical_block
6812 && abbrev
->tag
!= DW_TAG_variable
6813 && abbrev
->tag
!= DW_TAG_namespace
6814 && abbrev
->tag
!= DW_TAG_module
6815 && abbrev
->tag
!= DW_TAG_member
)
6817 /* Otherwise we skip to the next sibling, if any. */
6818 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
6822 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
6823 buffer
, info_ptr
, cu
);
6825 /* This two-pass algorithm for processing partial symbols has a
6826 high cost in cache pressure. Thus, handle some simple cases
6827 here which cover the majority of C partial symbols. DIEs
6828 which neither have specification tags in them, nor could have
6829 specification tags elsewhere pointing at them, can simply be
6830 processed and discarded.
6832 This segment is also optional; scan_partial_symbols and
6833 add_partial_symbol will handle these DIEs if we chain
6834 them in normally. When compilers which do not emit large
6835 quantities of duplicate debug information are more common,
6836 this code can probably be removed. */
6838 /* Any complete simple types at the top level (pretty much all
6839 of them, for a language without namespaces), can be processed
6841 if (parent_die
== NULL
6842 && part_die
->has_specification
== 0
6843 && part_die
->is_declaration
== 0
6844 && (part_die
->tag
== DW_TAG_typedef
6845 || part_die
->tag
== DW_TAG_base_type
6846 || part_die
->tag
== DW_TAG_subrange_type
))
6848 if (building_psymtab
&& part_die
->name
!= NULL
)
6849 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6850 VAR_DOMAIN
, LOC_TYPEDEF
,
6851 &cu
->objfile
->static_psymbols
,
6852 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6853 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6857 /* If we're at the second level, and we're an enumerator, and
6858 our parent has no specification (meaning possibly lives in a
6859 namespace elsewhere), then we can add the partial symbol now
6860 instead of queueing it. */
6861 if (part_die
->tag
== DW_TAG_enumerator
6862 && parent_die
!= NULL
6863 && parent_die
->die_parent
== NULL
6864 && parent_die
->tag
== DW_TAG_enumeration_type
6865 && parent_die
->has_specification
== 0)
6867 if (part_die
->name
== NULL
)
6868 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6869 else if (building_psymtab
)
6870 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6871 VAR_DOMAIN
, LOC_CONST
,
6872 (cu
->language
== language_cplus
6873 || cu
->language
== language_java
)
6874 ? &cu
->objfile
->global_psymbols
6875 : &cu
->objfile
->static_psymbols
,
6876 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6878 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6882 /* We'll save this DIE so link it in. */
6883 part_die
->die_parent
= parent_die
;
6884 part_die
->die_sibling
= NULL
;
6885 part_die
->die_child
= NULL
;
6887 if (last_die
&& last_die
== parent_die
)
6888 last_die
->die_child
= part_die
;
6890 last_die
->die_sibling
= part_die
;
6892 last_die
= part_die
;
6894 if (first_die
== NULL
)
6895 first_die
= part_die
;
6897 /* Maybe add the DIE to the hash table. Not all DIEs that we
6898 find interesting need to be in the hash table, because we
6899 also have the parent/sibling/child chains; only those that we
6900 might refer to by offset later during partial symbol reading.
6902 For now this means things that might have be the target of a
6903 DW_AT_specification, DW_AT_abstract_origin, or
6904 DW_AT_extension. DW_AT_extension will refer only to
6905 namespaces; DW_AT_abstract_origin refers to functions (and
6906 many things under the function DIE, but we do not recurse
6907 into function DIEs during partial symbol reading) and
6908 possibly variables as well; DW_AT_specification refers to
6909 declarations. Declarations ought to have the DW_AT_declaration
6910 flag. It happens that GCC forgets to put it in sometimes, but
6911 only for functions, not for types.
6913 Adding more things than necessary to the hash table is harmless
6914 except for the performance cost. Adding too few will result in
6915 wasted time in find_partial_die, when we reread the compilation
6916 unit with load_all_dies set. */
6919 || abbrev
->tag
== DW_TAG_subprogram
6920 || abbrev
->tag
== DW_TAG_variable
6921 || abbrev
->tag
== DW_TAG_namespace
6922 || part_die
->is_declaration
)
6926 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
6927 part_die
->offset
, INSERT
);
6931 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6932 sizeof (struct partial_die_info
));
6934 /* For some DIEs we want to follow their children (if any). For C
6935 we have no reason to follow the children of structures; for other
6936 languages we have to, both so that we can get at method physnames
6937 to infer fully qualified class names, and for DW_AT_specification.
6939 For Ada, we need to scan the children of subprograms and lexical
6940 blocks as well because Ada allows the definition of nested
6941 entities that could be interesting for the debugger, such as
6942 nested subprograms for instance. */
6943 if (last_die
->has_children
6945 || last_die
->tag
== DW_TAG_namespace
6946 || last_die
->tag
== DW_TAG_module
6947 || last_die
->tag
== DW_TAG_enumeration_type
6948 || (cu
->language
!= language_c
6949 && (last_die
->tag
== DW_TAG_class_type
6950 || last_die
->tag
== DW_TAG_interface_type
6951 || last_die
->tag
== DW_TAG_structure_type
6952 || last_die
->tag
== DW_TAG_union_type
))
6953 || (cu
->language
== language_ada
6954 && (last_die
->tag
== DW_TAG_subprogram
6955 || last_die
->tag
== DW_TAG_lexical_block
))))
6958 parent_die
= last_die
;
6962 /* Otherwise we skip to the next sibling, if any. */
6963 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
6965 /* Back to the top, do it again. */
6969 /* Read a minimal amount of information into the minimal die structure. */
6972 read_partial_die (struct partial_die_info
*part_die
,
6973 struct abbrev_info
*abbrev
,
6974 unsigned int abbrev_len
, bfd
*abfd
,
6975 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6976 struct dwarf2_cu
*cu
)
6979 struct attribute attr
;
6980 int has_low_pc_attr
= 0;
6981 int has_high_pc_attr
= 0;
6983 memset (part_die
, 0, sizeof (struct partial_die_info
));
6985 part_die
->offset
= info_ptr
- buffer
;
6987 info_ptr
+= abbrev_len
;
6992 part_die
->tag
= abbrev
->tag
;
6993 part_die
->has_children
= abbrev
->has_children
;
6995 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6997 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
6999 /* Store the data if it is of an attribute we want to keep in a
7000 partial symbol table. */
7004 switch (part_die
->tag
)
7006 case DW_TAG_compile_unit
:
7007 case DW_TAG_type_unit
:
7008 /* Compilation units have a DW_AT_name that is a filename, not
7009 a source language identifier. */
7010 case DW_TAG_enumeration_type
:
7011 case DW_TAG_enumerator
:
7012 /* These tags always have simple identifiers already; no need
7013 to canonicalize them. */
7014 part_die
->name
= DW_STRING (&attr
);
7018 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
7019 &cu
->objfile
->objfile_obstack
);
7023 case DW_AT_linkage_name
:
7024 case DW_AT_MIPS_linkage_name
:
7025 /* Note that both forms of linkage name might appear. We
7026 assume they will be the same, and we only store the last
7028 if (cu
->language
== language_ada
)
7029 part_die
->name
= DW_STRING (&attr
);
7032 has_low_pc_attr
= 1;
7033 part_die
->lowpc
= DW_ADDR (&attr
);
7036 has_high_pc_attr
= 1;
7037 part_die
->highpc
= DW_ADDR (&attr
);
7039 case DW_AT_location
:
7040 /* Support the .debug_loc offsets */
7041 if (attr_form_is_block (&attr
))
7043 part_die
->locdesc
= DW_BLOCK (&attr
);
7045 else if (attr_form_is_section_offset (&attr
))
7047 dwarf2_complex_location_expr_complaint ();
7051 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7052 "partial symbol information");
7055 case DW_AT_external
:
7056 part_die
->is_external
= DW_UNSND (&attr
);
7058 case DW_AT_declaration
:
7059 part_die
->is_declaration
= DW_UNSND (&attr
);
7062 part_die
->has_type
= 1;
7064 case DW_AT_abstract_origin
:
7065 case DW_AT_specification
:
7066 case DW_AT_extension
:
7067 part_die
->has_specification
= 1;
7068 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
7071 /* Ignore absolute siblings, they might point outside of
7072 the current compile unit. */
7073 if (attr
.form
== DW_FORM_ref_addr
)
7074 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
7076 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
7078 case DW_AT_byte_size
:
7079 part_die
->has_byte_size
= 1;
7081 case DW_AT_calling_convention
:
7082 /* DWARF doesn't provide a way to identify a program's source-level
7083 entry point. DW_AT_calling_convention attributes are only meant
7084 to describe functions' calling conventions.
7086 However, because it's a necessary piece of information in
7087 Fortran, and because DW_CC_program is the only piece of debugging
7088 information whose definition refers to a 'main program' at all,
7089 several compilers have begun marking Fortran main programs with
7090 DW_CC_program --- even when those functions use the standard
7091 calling conventions.
7093 So until DWARF specifies a way to provide this information and
7094 compilers pick up the new representation, we'll support this
7096 if (DW_UNSND (&attr
) == DW_CC_program
7097 && cu
->language
== language_fortran
)
7098 set_main_name (part_die
->name
);
7105 /* When using the GNU linker, .gnu.linkonce. sections are used to
7106 eliminate duplicate copies of functions and vtables and such.
7107 The linker will arbitrarily choose one and discard the others.
7108 The AT_*_pc values for such functions refer to local labels in
7109 these sections. If the section from that file was discarded, the
7110 labels are not in the output, so the relocs get a value of 0.
7111 If this is a discarded function, mark the pc bounds as invalid,
7112 so that GDB will ignore it. */
7113 if (has_low_pc_attr
&& has_high_pc_attr
7114 && part_die
->lowpc
< part_die
->highpc
7115 && (part_die
->lowpc
!= 0
7116 || dwarf2_per_objfile
->has_section_at_zero
))
7117 part_die
->has_pc_info
= 1;
7122 /* Find a cached partial DIE at OFFSET in CU. */
7124 static struct partial_die_info
*
7125 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
7127 struct partial_die_info
*lookup_die
= NULL
;
7128 struct partial_die_info part_die
;
7130 part_die
.offset
= offset
;
7131 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
7136 /* Find a partial DIE at OFFSET, which may or may not be in CU,
7137 except in the case of .debug_types DIEs which do not reference
7138 outside their CU (they do however referencing other types via
7141 static struct partial_die_info
*
7142 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
7144 struct dwarf2_per_cu_data
*per_cu
= NULL
;
7145 struct partial_die_info
*pd
= NULL
;
7147 if (cu
->per_cu
->from_debug_types
)
7149 pd
= find_partial_die_in_comp_unit (offset
, cu
);
7155 if (offset_in_cu_p (&cu
->header
, offset
))
7157 pd
= find_partial_die_in_comp_unit (offset
, cu
);
7162 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
7164 if (per_cu
->cu
== NULL
)
7166 load_partial_comp_unit (per_cu
, cu
->objfile
);
7167 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7168 dwarf2_per_objfile
->read_in_chain
= per_cu
;
7171 per_cu
->cu
->last_used
= 0;
7172 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
7174 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
7176 struct cleanup
*back_to
;
7177 struct partial_die_info comp_unit_die
;
7178 struct abbrev_info
*abbrev
;
7179 unsigned int bytes_read
;
7182 per_cu
->load_all_dies
= 1;
7184 /* Re-read the DIEs. */
7185 back_to
= make_cleanup (null_cleanup
, 0);
7186 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
7188 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
7189 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
7191 info_ptr
= (dwarf2_per_objfile
->info
.buffer
7192 + per_cu
->cu
->header
.offset
7193 + per_cu
->cu
->header
.first_die_offset
);
7194 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
7195 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
7196 per_cu
->cu
->objfile
->obfd
,
7197 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
7199 if (comp_unit_die
.has_children
)
7200 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
7201 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
7203 do_cleanups (back_to
);
7205 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
7211 internal_error (__FILE__
, __LINE__
,
7212 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
7213 offset
, bfd_get_filename (cu
->objfile
->obfd
));
7217 /* Adjust PART_DIE before generating a symbol for it. This function
7218 may set the is_external flag or change the DIE's name. */
7221 fixup_partial_die (struct partial_die_info
*part_die
,
7222 struct dwarf2_cu
*cu
)
7224 /* If we found a reference attribute and the DIE has no name, try
7225 to find a name in the referred to DIE. */
7227 if (part_die
->name
== NULL
&& part_die
->has_specification
)
7229 struct partial_die_info
*spec_die
;
7231 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
7233 fixup_partial_die (spec_die
, cu
);
7237 part_die
->name
= spec_die
->name
;
7239 /* Copy DW_AT_external attribute if it is set. */
7240 if (spec_die
->is_external
)
7241 part_die
->is_external
= spec_die
->is_external
;
7245 /* Set default names for some unnamed DIEs. */
7246 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
7247 || part_die
->tag
== DW_TAG_class_type
))
7248 part_die
->name
= "(anonymous class)";
7250 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
7251 part_die
->name
= "(anonymous namespace)";
7253 if (part_die
->tag
== DW_TAG_structure_type
7254 || part_die
->tag
== DW_TAG_class_type
7255 || part_die
->tag
== DW_TAG_union_type
)
7256 guess_structure_name (part_die
, cu
);
7259 /* Read an attribute value described by an attribute form. */
7262 read_attribute_value (struct attribute
*attr
, unsigned form
,
7263 bfd
*abfd
, gdb_byte
*info_ptr
,
7264 struct dwarf2_cu
*cu
)
7266 struct comp_unit_head
*cu_header
= &cu
->header
;
7267 unsigned int bytes_read
;
7268 struct dwarf_block
*blk
;
7273 case DW_FORM_ref_addr
:
7274 if (cu
->header
.version
== 2)
7275 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7277 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
7278 info_ptr
+= bytes_read
;
7281 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7282 info_ptr
+= bytes_read
;
7284 case DW_FORM_block2
:
7285 blk
= dwarf_alloc_block (cu
);
7286 blk
->size
= read_2_bytes (abfd
, info_ptr
);
7288 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7289 info_ptr
+= blk
->size
;
7290 DW_BLOCK (attr
) = blk
;
7292 case DW_FORM_block4
:
7293 blk
= dwarf_alloc_block (cu
);
7294 blk
->size
= read_4_bytes (abfd
, info_ptr
);
7296 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7297 info_ptr
+= blk
->size
;
7298 DW_BLOCK (attr
) = blk
;
7301 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
7305 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
7309 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
7312 case DW_FORM_sec_offset
:
7313 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
7314 info_ptr
+= bytes_read
;
7316 case DW_FORM_string
:
7317 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
7318 DW_STRING_IS_CANONICAL (attr
) = 0;
7319 info_ptr
+= bytes_read
;
7322 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
7324 DW_STRING_IS_CANONICAL (attr
) = 0;
7325 info_ptr
+= bytes_read
;
7327 case DW_FORM_exprloc
:
7329 blk
= dwarf_alloc_block (cu
);
7330 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7331 info_ptr
+= bytes_read
;
7332 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7333 info_ptr
+= blk
->size
;
7334 DW_BLOCK (attr
) = blk
;
7336 case DW_FORM_block1
:
7337 blk
= dwarf_alloc_block (cu
);
7338 blk
->size
= read_1_byte (abfd
, info_ptr
);
7340 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7341 info_ptr
+= blk
->size
;
7342 DW_BLOCK (attr
) = blk
;
7345 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7349 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7352 case DW_FORM_flag_present
:
7353 DW_UNSND (attr
) = 1;
7356 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
7357 info_ptr
+= bytes_read
;
7360 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7361 info_ptr
+= bytes_read
;
7364 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
7368 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
7372 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
7376 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
7380 /* Convert the signature to something we can record in DW_UNSND
7382 NOTE: This is NULL if the type wasn't found. */
7383 DW_SIGNATURED_TYPE (attr
) =
7384 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
7387 case DW_FORM_ref_udata
:
7388 DW_ADDR (attr
) = (cu
->header
.offset
7389 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
7390 info_ptr
+= bytes_read
;
7392 case DW_FORM_indirect
:
7393 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7394 info_ptr
+= bytes_read
;
7395 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
7398 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7399 dwarf_form_name (form
),
7400 bfd_get_filename (abfd
));
7403 /* We have seen instances where the compiler tried to emit a byte
7404 size attribute of -1 which ended up being encoded as an unsigned
7405 0xffffffff. Although 0xffffffff is technically a valid size value,
7406 an object of this size seems pretty unlikely so we can relatively
7407 safely treat these cases as if the size attribute was invalid and
7408 treat them as zero by default. */
7409 if (attr
->name
== DW_AT_byte_size
7410 && form
== DW_FORM_data4
7411 && DW_UNSND (attr
) >= 0xffffffff)
7414 (&symfile_complaints
,
7415 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
7416 hex_string (DW_UNSND (attr
)));
7417 DW_UNSND (attr
) = 0;
7423 /* Read an attribute described by an abbreviated attribute. */
7426 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
7427 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
7429 attr
->name
= abbrev
->name
;
7430 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
7433 /* read dwarf information from a buffer */
7436 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
7438 return bfd_get_8 (abfd
, buf
);
7442 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
7444 return bfd_get_signed_8 (abfd
, buf
);
7448 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
7450 return bfd_get_16 (abfd
, buf
);
7454 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7456 return bfd_get_signed_16 (abfd
, buf
);
7460 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
7462 return bfd_get_32 (abfd
, buf
);
7466 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7468 return bfd_get_signed_32 (abfd
, buf
);
7472 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
7474 return bfd_get_64 (abfd
, buf
);
7478 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
7479 unsigned int *bytes_read
)
7481 struct comp_unit_head
*cu_header
= &cu
->header
;
7482 CORE_ADDR retval
= 0;
7484 if (cu_header
->signed_addr_p
)
7486 switch (cu_header
->addr_size
)
7489 retval
= bfd_get_signed_16 (abfd
, buf
);
7492 retval
= bfd_get_signed_32 (abfd
, buf
);
7495 retval
= bfd_get_signed_64 (abfd
, buf
);
7498 internal_error (__FILE__
, __LINE__
,
7499 _("read_address: bad switch, signed [in module %s]"),
7500 bfd_get_filename (abfd
));
7505 switch (cu_header
->addr_size
)
7508 retval
= bfd_get_16 (abfd
, buf
);
7511 retval
= bfd_get_32 (abfd
, buf
);
7514 retval
= bfd_get_64 (abfd
, buf
);
7517 internal_error (__FILE__
, __LINE__
,
7518 _("read_address: bad switch, unsigned [in module %s]"),
7519 bfd_get_filename (abfd
));
7523 *bytes_read
= cu_header
->addr_size
;
7527 /* Read the initial length from a section. The (draft) DWARF 3
7528 specification allows the initial length to take up either 4 bytes
7529 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7530 bytes describe the length and all offsets will be 8 bytes in length
7533 An older, non-standard 64-bit format is also handled by this
7534 function. The older format in question stores the initial length
7535 as an 8-byte quantity without an escape value. Lengths greater
7536 than 2^32 aren't very common which means that the initial 4 bytes
7537 is almost always zero. Since a length value of zero doesn't make
7538 sense for the 32-bit format, this initial zero can be considered to
7539 be an escape value which indicates the presence of the older 64-bit
7540 format. As written, the code can't detect (old format) lengths
7541 greater than 4GB. If it becomes necessary to handle lengths
7542 somewhat larger than 4GB, we could allow other small values (such
7543 as the non-sensical values of 1, 2, and 3) to also be used as
7544 escape values indicating the presence of the old format.
7546 The value returned via bytes_read should be used to increment the
7547 relevant pointer after calling read_initial_length().
7549 [ Note: read_initial_length() and read_offset() are based on the
7550 document entitled "DWARF Debugging Information Format", revision
7551 3, draft 8, dated November 19, 2001. This document was obtained
7554 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7556 This document is only a draft and is subject to change. (So beware.)
7558 Details regarding the older, non-standard 64-bit format were
7559 determined empirically by examining 64-bit ELF files produced by
7560 the SGI toolchain on an IRIX 6.5 machine.
7562 - Kevin, July 16, 2002
7566 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
7568 LONGEST length
= bfd_get_32 (abfd
, buf
);
7570 if (length
== 0xffffffff)
7572 length
= bfd_get_64 (abfd
, buf
+ 4);
7575 else if (length
== 0)
7577 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7578 length
= bfd_get_64 (abfd
, buf
);
7589 /* Cover function for read_initial_length.
7590 Returns the length of the object at BUF, and stores the size of the
7591 initial length in *BYTES_READ and stores the size that offsets will be in
7593 If the initial length size is not equivalent to that specified in
7594 CU_HEADER then issue a complaint.
7595 This is useful when reading non-comp-unit headers. */
7598 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
7599 const struct comp_unit_head
*cu_header
,
7600 unsigned int *bytes_read
,
7601 unsigned int *offset_size
)
7603 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
7605 gdb_assert (cu_header
->initial_length_size
== 4
7606 || cu_header
->initial_length_size
== 8
7607 || cu_header
->initial_length_size
== 12);
7609 if (cu_header
->initial_length_size
!= *bytes_read
)
7610 complaint (&symfile_complaints
,
7611 _("intermixed 32-bit and 64-bit DWARF sections"));
7613 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
7617 /* Read an offset from the data stream. The size of the offset is
7618 given by cu_header->offset_size. */
7621 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
7622 unsigned int *bytes_read
)
7624 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
7626 *bytes_read
= cu_header
->offset_size
;
7630 /* Read an offset from the data stream. */
7633 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
7637 switch (offset_size
)
7640 retval
= bfd_get_32 (abfd
, buf
);
7643 retval
= bfd_get_64 (abfd
, buf
);
7646 internal_error (__FILE__
, __LINE__
,
7647 _("read_offset_1: bad switch [in module %s]"),
7648 bfd_get_filename (abfd
));
7655 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
7657 /* If the size of a host char is 8 bits, we can return a pointer
7658 to the buffer, otherwise we have to copy the data to a buffer
7659 allocated on the temporary obstack. */
7660 gdb_assert (HOST_CHAR_BIT
== 8);
7665 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7667 /* If the size of a host char is 8 bits, we can return a pointer
7668 to the string, otherwise we have to copy the string to a buffer
7669 allocated on the temporary obstack. */
7670 gdb_assert (HOST_CHAR_BIT
== 8);
7673 *bytes_read_ptr
= 1;
7676 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
7677 return (char *) buf
;
7681 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
7682 const struct comp_unit_head
*cu_header
,
7683 unsigned int *bytes_read_ptr
)
7685 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
7687 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
7688 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
7690 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7691 bfd_get_filename (abfd
));
7694 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
7696 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7697 bfd_get_filename (abfd
));
7700 gdb_assert (HOST_CHAR_BIT
== 8);
7701 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
7703 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
7706 static unsigned long
7707 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7709 unsigned long result
;
7710 unsigned int num_read
;
7720 byte
= bfd_get_8 (abfd
, buf
);
7723 result
|= ((unsigned long)(byte
& 127) << shift
);
7724 if ((byte
& 128) == 0)
7730 *bytes_read_ptr
= num_read
;
7735 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7738 int i
, shift
, num_read
;
7747 byte
= bfd_get_8 (abfd
, buf
);
7750 result
|= ((long)(byte
& 127) << shift
);
7752 if ((byte
& 128) == 0)
7757 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
7758 result
|= -(((long)1) << shift
);
7759 *bytes_read_ptr
= num_read
;
7763 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7766 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
7772 byte
= bfd_get_8 (abfd
, buf
);
7774 if ((byte
& 128) == 0)
7780 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
7787 cu
->language
= language_c
;
7789 case DW_LANG_C_plus_plus
:
7790 cu
->language
= language_cplus
;
7793 cu
->language
= language_d
;
7795 case DW_LANG_Fortran77
:
7796 case DW_LANG_Fortran90
:
7797 case DW_LANG_Fortran95
:
7798 cu
->language
= language_fortran
;
7800 case DW_LANG_Mips_Assembler
:
7801 cu
->language
= language_asm
;
7804 cu
->language
= language_java
;
7808 cu
->language
= language_ada
;
7810 case DW_LANG_Modula2
:
7811 cu
->language
= language_m2
;
7813 case DW_LANG_Pascal83
:
7814 cu
->language
= language_pascal
;
7817 cu
->language
= language_objc
;
7819 case DW_LANG_Cobol74
:
7820 case DW_LANG_Cobol85
:
7822 cu
->language
= language_minimal
;
7825 cu
->language_defn
= language_def (cu
->language
);
7828 /* Return the named attribute or NULL if not there. */
7830 static struct attribute
*
7831 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7834 struct attribute
*spec
= NULL
;
7836 for (i
= 0; i
< die
->num_attrs
; ++i
)
7838 if (die
->attrs
[i
].name
== name
)
7839 return &die
->attrs
[i
];
7840 if (die
->attrs
[i
].name
== DW_AT_specification
7841 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7842 spec
= &die
->attrs
[i
];
7847 die
= follow_die_ref (die
, spec
, &cu
);
7848 return dwarf2_attr (die
, name
, cu
);
7854 /* Return the named attribute or NULL if not there,
7855 but do not follow DW_AT_specification, etc.
7856 This is for use in contexts where we're reading .debug_types dies.
7857 Following DW_AT_specification, DW_AT_abstract_origin will take us
7858 back up the chain, and we want to go down. */
7860 static struct attribute
*
7861 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
7862 struct dwarf2_cu
*cu
)
7866 for (i
= 0; i
< die
->num_attrs
; ++i
)
7867 if (die
->attrs
[i
].name
== name
)
7868 return &die
->attrs
[i
];
7873 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7874 and holds a non-zero value. This function should only be used for
7875 DW_FORM_flag or DW_FORM_flag_present attributes. */
7878 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7880 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7882 return (attr
&& DW_UNSND (attr
));
7886 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7888 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7889 which value is non-zero. However, we have to be careful with
7890 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7891 (via dwarf2_flag_true_p) follows this attribute. So we may
7892 end up accidently finding a declaration attribute that belongs
7893 to a different DIE referenced by the specification attribute,
7894 even though the given DIE does not have a declaration attribute. */
7895 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7896 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7899 /* Return the die giving the specification for DIE, if there is
7900 one. *SPEC_CU is the CU containing DIE on input, and the CU
7901 containing the return value on output. If there is no
7902 specification, but there is an abstract origin, that is
7905 static struct die_info
*
7906 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7908 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
7911 if (spec_attr
== NULL
)
7912 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
7914 if (spec_attr
== NULL
)
7917 return follow_die_ref (die
, spec_attr
, spec_cu
);
7920 /* Free the line_header structure *LH, and any arrays and strings it
7923 free_line_header (struct line_header
*lh
)
7925 if (lh
->standard_opcode_lengths
)
7926 xfree (lh
->standard_opcode_lengths
);
7928 /* Remember that all the lh->file_names[i].name pointers are
7929 pointers into debug_line_buffer, and don't need to be freed. */
7931 xfree (lh
->file_names
);
7933 /* Similarly for the include directory names. */
7934 if (lh
->include_dirs
)
7935 xfree (lh
->include_dirs
);
7941 /* Add an entry to LH's include directory table. */
7943 add_include_dir (struct line_header
*lh
, char *include_dir
)
7945 /* Grow the array if necessary. */
7946 if (lh
->include_dirs_size
== 0)
7948 lh
->include_dirs_size
= 1; /* for testing */
7949 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
7950 * sizeof (*lh
->include_dirs
));
7952 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
7954 lh
->include_dirs_size
*= 2;
7955 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
7956 (lh
->include_dirs_size
7957 * sizeof (*lh
->include_dirs
)));
7960 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
7964 /* Add an entry to LH's file name table. */
7966 add_file_name (struct line_header
*lh
,
7968 unsigned int dir_index
,
7969 unsigned int mod_time
,
7970 unsigned int length
)
7972 struct file_entry
*fe
;
7974 /* Grow the array if necessary. */
7975 if (lh
->file_names_size
== 0)
7977 lh
->file_names_size
= 1; /* for testing */
7978 lh
->file_names
= xmalloc (lh
->file_names_size
7979 * sizeof (*lh
->file_names
));
7981 else if (lh
->num_file_names
>= lh
->file_names_size
)
7983 lh
->file_names_size
*= 2;
7984 lh
->file_names
= xrealloc (lh
->file_names
,
7985 (lh
->file_names_size
7986 * sizeof (*lh
->file_names
)));
7989 fe
= &lh
->file_names
[lh
->num_file_names
++];
7991 fe
->dir_index
= dir_index
;
7992 fe
->mod_time
= mod_time
;
7993 fe
->length
= length
;
7999 /* Read the statement program header starting at OFFSET in
8000 .debug_line, according to the endianness of ABFD. Return a pointer
8001 to a struct line_header, allocated using xmalloc.
8003 NOTE: the strings in the include directory and file name tables of
8004 the returned object point into debug_line_buffer, and must not be
8006 static struct line_header
*
8007 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
8008 struct dwarf2_cu
*cu
)
8010 struct cleanup
*back_to
;
8011 struct line_header
*lh
;
8013 unsigned int bytes_read
, offset_size
;
8015 char *cur_dir
, *cur_file
;
8017 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
8018 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
8020 complaint (&symfile_complaints
, _("missing .debug_line section"));
8024 /* Make sure that at least there's room for the total_length field.
8025 That could be 12 bytes long, but we're just going to fudge that. */
8026 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
8028 dwarf2_statement_list_fits_in_line_number_section_complaint ();
8032 lh
= xmalloc (sizeof (*lh
));
8033 memset (lh
, 0, sizeof (*lh
));
8034 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
8037 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
8039 /* Read in the header. */
8041 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
8042 &bytes_read
, &offset_size
);
8043 line_ptr
+= bytes_read
;
8044 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
8045 + dwarf2_per_objfile
->line
.size
))
8047 dwarf2_statement_list_fits_in_line_number_section_complaint ();
8050 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
8051 lh
->version
= read_2_bytes (abfd
, line_ptr
);
8053 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
8054 line_ptr
+= offset_size
;
8055 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
8057 if (lh
->version
>= 4)
8059 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
8063 lh
->maximum_ops_per_instruction
= 1;
8065 if (lh
->maximum_ops_per_instruction
== 0)
8067 lh
->maximum_ops_per_instruction
= 1;
8068 complaint (&symfile_complaints
,
8069 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
8072 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
8074 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
8076 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
8078 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
8080 lh
->standard_opcode_lengths
8081 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
8083 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
8084 for (i
= 1; i
< lh
->opcode_base
; ++i
)
8086 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
8090 /* Read directory table. */
8091 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
8093 line_ptr
+= bytes_read
;
8094 add_include_dir (lh
, cur_dir
);
8096 line_ptr
+= bytes_read
;
8098 /* Read file name table. */
8099 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
8101 unsigned int dir_index
, mod_time
, length
;
8103 line_ptr
+= bytes_read
;
8104 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8105 line_ptr
+= bytes_read
;
8106 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8107 line_ptr
+= bytes_read
;
8108 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8109 line_ptr
+= bytes_read
;
8111 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
8113 line_ptr
+= bytes_read
;
8114 lh
->statement_program_start
= line_ptr
;
8116 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
8117 + dwarf2_per_objfile
->line
.size
))
8118 complaint (&symfile_complaints
,
8119 _("line number info header doesn't fit in `.debug_line' section"));
8121 discard_cleanups (back_to
);
8125 /* This function exists to work around a bug in certain compilers
8126 (particularly GCC 2.95), in which the first line number marker of a
8127 function does not show up until after the prologue, right before
8128 the second line number marker. This function shifts ADDRESS down
8129 to the beginning of the function if necessary, and is called on
8130 addresses passed to record_line. */
8133 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
8135 struct function_range
*fn
;
8137 /* Find the function_range containing address. */
8142 cu
->cached_fn
= cu
->first_fn
;
8146 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
8152 while (fn
&& fn
!= cu
->cached_fn
)
8153 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
8163 if (address
!= fn
->lowpc
)
8164 complaint (&symfile_complaints
,
8165 _("misplaced first line number at 0x%lx for '%s'"),
8166 (unsigned long) address
, fn
->name
);
8171 /* Decode the Line Number Program (LNP) for the given line_header
8172 structure and CU. The actual information extracted and the type
8173 of structures created from the LNP depends on the value of PST.
8175 1. If PST is NULL, then this procedure uses the data from the program
8176 to create all necessary symbol tables, and their linetables.
8177 The compilation directory of the file is passed in COMP_DIR,
8178 and must not be NULL.
8180 2. If PST is not NULL, this procedure reads the program to determine
8181 the list of files included by the unit represented by PST, and
8182 builds all the associated partial symbol tables. In this case,
8183 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
8184 is not used to compute the full name of the symtab, and therefore
8185 omitting it when building the partial symtab does not introduce
8186 the potential for inconsistency - a partial symtab and its associated
8187 symbtab having a different fullname -). */
8190 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
8191 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
8193 gdb_byte
*line_ptr
, *extended_end
;
8195 unsigned int bytes_read
, extended_len
;
8196 unsigned char op_code
, extended_op
, adj_opcode
;
8198 struct objfile
*objfile
= cu
->objfile
;
8199 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8200 const int decode_for_pst_p
= (pst
!= NULL
);
8201 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
8203 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8205 line_ptr
= lh
->statement_program_start
;
8206 line_end
= lh
->statement_program_end
;
8208 /* Read the statement sequences until there's nothing left. */
8209 while (line_ptr
< line_end
)
8211 /* state machine registers */
8212 CORE_ADDR address
= 0;
8213 unsigned int file
= 1;
8214 unsigned int line
= 1;
8215 unsigned int column
= 0;
8216 int is_stmt
= lh
->default_is_stmt
;
8217 int basic_block
= 0;
8218 int end_sequence
= 0;
8220 unsigned char op_index
= 0;
8222 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
8224 /* Start a subfile for the current file of the state machine. */
8225 /* lh->include_dirs and lh->file_names are 0-based, but the
8226 directory and file name numbers in the statement program
8228 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
8232 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8234 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8237 /* Decode the table. */
8238 while (!end_sequence
)
8240 op_code
= read_1_byte (abfd
, line_ptr
);
8242 if (line_ptr
> line_end
)
8244 dwarf2_debug_line_missing_end_sequence_complaint ();
8248 if (op_code
>= lh
->opcode_base
)
8250 /* Special operand. */
8251 adj_opcode
= op_code
- lh
->opcode_base
;
8252 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
8253 / lh
->maximum_ops_per_instruction
)
8254 * lh
->minimum_instruction_length
);
8255 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
8256 % lh
->maximum_ops_per_instruction
);
8257 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
8258 if (lh
->num_file_names
< file
|| file
== 0)
8259 dwarf2_debug_line_missing_file_complaint ();
8260 /* For now we ignore lines not starting on an
8261 instruction boundary. */
8262 else if (op_index
== 0)
8264 lh
->file_names
[file
- 1].included_p
= 1;
8265 if (!decode_for_pst_p
&& is_stmt
)
8267 if (last_subfile
!= current_subfile
)
8269 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8271 record_line (last_subfile
, 0, addr
);
8272 last_subfile
= current_subfile
;
8274 /* Append row to matrix using current values. */
8275 addr
= check_cu_functions (address
, cu
);
8276 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8277 record_line (current_subfile
, line
, addr
);
8282 else switch (op_code
)
8284 case DW_LNS_extended_op
:
8285 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8286 line_ptr
+= bytes_read
;
8287 extended_end
= line_ptr
+ extended_len
;
8288 extended_op
= read_1_byte (abfd
, line_ptr
);
8290 switch (extended_op
)
8292 case DW_LNE_end_sequence
:
8295 case DW_LNE_set_address
:
8296 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
8298 line_ptr
+= bytes_read
;
8299 address
+= baseaddr
;
8301 case DW_LNE_define_file
:
8304 unsigned int dir_index
, mod_time
, length
;
8306 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
8307 line_ptr
+= bytes_read
;
8309 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8310 line_ptr
+= bytes_read
;
8312 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8313 line_ptr
+= bytes_read
;
8315 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8316 line_ptr
+= bytes_read
;
8317 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
8320 case DW_LNE_set_discriminator
:
8321 /* The discriminator is not interesting to the debugger;
8323 line_ptr
= extended_end
;
8326 complaint (&symfile_complaints
,
8327 _("mangled .debug_line section"));
8330 /* Make sure that we parsed the extended op correctly. If e.g.
8331 we expected a different address size than the producer used,
8332 we may have read the wrong number of bytes. */
8333 if (line_ptr
!= extended_end
)
8335 complaint (&symfile_complaints
,
8336 _("mangled .debug_line section"));
8341 if (lh
->num_file_names
< file
|| file
== 0)
8342 dwarf2_debug_line_missing_file_complaint ();
8345 lh
->file_names
[file
- 1].included_p
= 1;
8346 if (!decode_for_pst_p
&& is_stmt
)
8348 if (last_subfile
!= current_subfile
)
8350 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8352 record_line (last_subfile
, 0, addr
);
8353 last_subfile
= current_subfile
;
8355 addr
= check_cu_functions (address
, cu
);
8356 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8357 record_line (current_subfile
, line
, addr
);
8362 case DW_LNS_advance_pc
:
8365 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8367 address
+= (((op_index
+ adjust
)
8368 / lh
->maximum_ops_per_instruction
)
8369 * lh
->minimum_instruction_length
);
8370 op_index
= ((op_index
+ adjust
)
8371 % lh
->maximum_ops_per_instruction
);
8372 line_ptr
+= bytes_read
;
8375 case DW_LNS_advance_line
:
8376 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
8377 line_ptr
+= bytes_read
;
8379 case DW_LNS_set_file
:
8381 /* The arrays lh->include_dirs and lh->file_names are
8382 0-based, but the directory and file name numbers in
8383 the statement program are 1-based. */
8384 struct file_entry
*fe
;
8387 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8388 line_ptr
+= bytes_read
;
8389 if (lh
->num_file_names
< file
|| file
== 0)
8390 dwarf2_debug_line_missing_file_complaint ();
8393 fe
= &lh
->file_names
[file
- 1];
8395 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8396 if (!decode_for_pst_p
)
8398 last_subfile
= current_subfile
;
8399 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8404 case DW_LNS_set_column
:
8405 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8406 line_ptr
+= bytes_read
;
8408 case DW_LNS_negate_stmt
:
8409 is_stmt
= (!is_stmt
);
8411 case DW_LNS_set_basic_block
:
8414 /* Add to the address register of the state machine the
8415 address increment value corresponding to special opcode
8416 255. I.e., this value is scaled by the minimum
8417 instruction length since special opcode 255 would have
8418 scaled the the increment. */
8419 case DW_LNS_const_add_pc
:
8421 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
8423 address
+= (((op_index
+ adjust
)
8424 / lh
->maximum_ops_per_instruction
)
8425 * lh
->minimum_instruction_length
);
8426 op_index
= ((op_index
+ adjust
)
8427 % lh
->maximum_ops_per_instruction
);
8430 case DW_LNS_fixed_advance_pc
:
8431 address
+= read_2_bytes (abfd
, line_ptr
);
8437 /* Unknown standard opcode, ignore it. */
8440 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
8442 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8443 line_ptr
+= bytes_read
;
8448 if (lh
->num_file_names
< file
|| file
== 0)
8449 dwarf2_debug_line_missing_file_complaint ();
8452 lh
->file_names
[file
- 1].included_p
= 1;
8453 if (!decode_for_pst_p
)
8455 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8456 record_line (current_subfile
, 0, addr
);
8461 if (decode_for_pst_p
)
8465 /* Now that we're done scanning the Line Header Program, we can
8466 create the psymtab of each included file. */
8467 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
8468 if (lh
->file_names
[file_index
].included_p
== 1)
8470 const struct file_entry fe
= lh
->file_names
[file_index
];
8471 char *include_name
= fe
.name
;
8472 char *dir_name
= NULL
;
8473 char *pst_filename
= pst
->filename
;
8476 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
8478 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
8480 include_name
= concat (dir_name
, SLASH_STRING
,
8481 include_name
, (char *)NULL
);
8482 make_cleanup (xfree
, include_name
);
8485 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
8487 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
8488 pst_filename
, (char *)NULL
);
8489 make_cleanup (xfree
, pst_filename
);
8492 if (strcmp (include_name
, pst_filename
) != 0)
8493 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
8498 /* Make sure a symtab is created for every file, even files
8499 which contain only variables (i.e. no code with associated
8503 struct file_entry
*fe
;
8505 for (i
= 0; i
< lh
->num_file_names
; i
++)
8509 fe
= &lh
->file_names
[i
];
8511 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8512 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8514 /* Skip the main file; we don't need it, and it must be
8515 allocated last, so that it will show up before the
8516 non-primary symtabs in the objfile's symtab list. */
8517 if (current_subfile
== first_subfile
)
8520 if (current_subfile
->symtab
== NULL
)
8521 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8523 fe
->symtab
= current_subfile
->symtab
;
8528 /* Start a subfile for DWARF. FILENAME is the name of the file and
8529 DIRNAME the name of the source directory which contains FILENAME
8530 or NULL if not known. COMP_DIR is the compilation directory for the
8531 linetable's compilation unit or NULL if not known.
8532 This routine tries to keep line numbers from identical absolute and
8533 relative file names in a common subfile.
8535 Using the `list' example from the GDB testsuite, which resides in
8536 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8537 of /srcdir/list0.c yields the following debugging information for list0.c:
8539 DW_AT_name: /srcdir/list0.c
8540 DW_AT_comp_dir: /compdir
8541 files.files[0].name: list0.h
8542 files.files[0].dir: /srcdir
8543 files.files[1].name: list0.c
8544 files.files[1].dir: /srcdir
8546 The line number information for list0.c has to end up in a single
8547 subfile, so that `break /srcdir/list0.c:1' works as expected.
8548 start_subfile will ensure that this happens provided that we pass the
8549 concatenation of files.files[1].dir and files.files[1].name as the
8553 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
8557 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8558 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8559 second argument to start_subfile. To be consistent, we do the
8560 same here. In order not to lose the line information directory,
8561 we concatenate it to the filename when it makes sense.
8562 Note that the Dwarf3 standard says (speaking of filenames in line
8563 information): ``The directory index is ignored for file names
8564 that represent full path names''. Thus ignoring dirname in the
8565 `else' branch below isn't an issue. */
8567 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
8568 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
8570 fullname
= filename
;
8572 start_subfile (fullname
, comp_dir
);
8574 if (fullname
!= filename
)
8579 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
8580 struct dwarf2_cu
*cu
)
8582 struct objfile
*objfile
= cu
->objfile
;
8583 struct comp_unit_head
*cu_header
= &cu
->header
;
8585 /* NOTE drow/2003-01-30: There used to be a comment and some special
8586 code here to turn a symbol with DW_AT_external and a
8587 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8588 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8589 with some versions of binutils) where shared libraries could have
8590 relocations against symbols in their debug information - the
8591 minimal symbol would have the right address, but the debug info
8592 would not. It's no longer necessary, because we will explicitly
8593 apply relocations when we read in the debug information now. */
8595 /* A DW_AT_location attribute with no contents indicates that a
8596 variable has been optimized away. */
8597 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
8599 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8603 /* Handle one degenerate form of location expression specially, to
8604 preserve GDB's previous behavior when section offsets are
8605 specified. If this is just a DW_OP_addr then mark this symbol
8608 if (attr_form_is_block (attr
)
8609 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
8610 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
8614 SYMBOL_VALUE_ADDRESS (sym
) =
8615 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
8616 SYMBOL_CLASS (sym
) = LOC_STATIC
;
8617 fixup_symbol_section (sym
, objfile
);
8618 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
8619 SYMBOL_SECTION (sym
));
8623 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8624 expression evaluator, and use LOC_COMPUTED only when necessary
8625 (i.e. when the value of a register or memory location is
8626 referenced, or a thread-local block, etc.). Then again, it might
8627 not be worthwhile. I'm assuming that it isn't unless performance
8628 or memory numbers show me otherwise. */
8630 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
8631 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
8634 /* Given a pointer to a DWARF information entry, figure out if we need
8635 to make a symbol table entry for it, and if so, create a new entry
8636 and return a pointer to it.
8637 If TYPE is NULL, determine symbol type from the die, otherwise
8638 used the passed type. */
8640 static struct symbol
*
8641 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
8643 struct objfile
*objfile
= cu
->objfile
;
8644 struct symbol
*sym
= NULL
;
8646 struct attribute
*attr
= NULL
;
8647 struct attribute
*attr2
= NULL
;
8649 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8651 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8653 name
= dwarf2_name (die
, cu
);
8656 const char *linkagename
;
8658 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
8659 sizeof (struct symbol
));
8660 OBJSTAT (objfile
, n_syms
++);
8661 memset (sym
, 0, sizeof (struct symbol
));
8663 /* Cache this symbol's name and the name's demangled form (if any). */
8664 SYMBOL_LANGUAGE (sym
) = cu
->language
;
8665 linkagename
= dwarf2_physname (name
, die
, cu
);
8666 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
8668 /* Fortran does not have mangling standard and the mangling does differ
8669 between gfortran, iFort etc. */
8670 if (cu
->language
== language_fortran
8671 && sym
->ginfo
.language_specific
.cplus_specific
.demangled_name
== NULL
)
8672 sym
->ginfo
.language_specific
.cplus_specific
.demangled_name
8673 = (char *) dwarf2_full_name (name
, die
, cu
);
8675 /* Default assumptions.
8676 Use the passed type or decode it from the die. */
8677 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8678 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8680 SYMBOL_TYPE (sym
) = type
;
8682 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
8683 attr
= dwarf2_attr (die
,
8684 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
8688 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
8691 attr
= dwarf2_attr (die
,
8692 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
8696 int file_index
= DW_UNSND (attr
);
8698 if (cu
->line_header
== NULL
8699 || file_index
> cu
->line_header
->num_file_names
)
8700 complaint (&symfile_complaints
,
8701 _("file index out of range"));
8702 else if (file_index
> 0)
8704 struct file_entry
*fe
;
8706 fe
= &cu
->line_header
->file_names
[file_index
- 1];
8707 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
8714 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8717 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
8719 SYMBOL_CLASS (sym
) = LOC_LABEL
;
8721 case DW_TAG_subprogram
:
8722 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8724 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8725 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8726 if ((attr2
&& (DW_UNSND (attr2
) != 0))
8727 || cu
->language
== language_ada
)
8729 /* Subprograms marked external are stored as a global symbol.
8730 Ada subprograms, whether marked external or not, are always
8731 stored as a global symbol, because we want to be able to
8732 access them globally. For instance, we want to be able
8733 to break on a nested subprogram without having to
8734 specify the context. */
8735 add_symbol_to_list (sym
, &global_symbols
);
8739 add_symbol_to_list (sym
, cu
->list_in_scope
);
8742 case DW_TAG_inlined_subroutine
:
8743 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8745 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8746 SYMBOL_INLINED (sym
) = 1;
8747 /* Do not add the symbol to any lists. It will be found via
8748 BLOCK_FUNCTION from the blockvector. */
8750 case DW_TAG_variable
:
8751 /* Compilation with minimal debug info may result in variables
8752 with missing type entries. Change the misleading `void' type
8753 to something sensible. */
8754 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
8756 = objfile_type (objfile
)->nodebug_data_symbol
;
8758 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8761 dwarf2_const_value (attr
, sym
, cu
);
8762 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8763 if (attr2
&& (DW_UNSND (attr2
) != 0))
8764 add_symbol_to_list (sym
, &global_symbols
);
8766 add_symbol_to_list (sym
, cu
->list_in_scope
);
8769 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8772 var_decode_location (attr
, sym
, cu
);
8773 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8774 if (attr2
&& (DW_UNSND (attr2
) != 0))
8776 struct pending
**list_to_add
;
8778 /* Workaround gfortran PR debug/40040 - it uses
8779 DW_AT_location for variables in -fPIC libraries which may
8780 get overriden by other libraries/executable and get
8781 a different address. Resolve it by the minimal symbol
8782 which may come from inferior's executable using copy
8783 relocation. Make this workaround only for gfortran as for
8784 other compilers GDB cannot guess the minimal symbol
8785 Fortran mangling kind. */
8786 if (cu
->language
== language_fortran
&& die
->parent
8787 && die
->parent
->tag
== DW_TAG_module
8789 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
8790 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8792 /* A variable with DW_AT_external is never static,
8793 but it may be block-scoped. */
8794 list_to_add
= (cu
->list_in_scope
== &file_symbols
8795 ? &global_symbols
: cu
->list_in_scope
);
8796 add_symbol_to_list (sym
, list_to_add
);
8799 add_symbol_to_list (sym
, cu
->list_in_scope
);
8803 /* We do not know the address of this symbol.
8804 If it is an external symbol and we have type information
8805 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8806 The address of the variable will then be determined from
8807 the minimal symbol table whenever the variable is
8809 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8810 if (attr2
&& (DW_UNSND (attr2
) != 0)
8811 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
8813 struct pending
**list_to_add
;
8815 /* A variable with DW_AT_external is never static, but it
8816 may be block-scoped. */
8817 list_to_add
= (cu
->list_in_scope
== &file_symbols
8818 ? &global_symbols
: cu
->list_in_scope
);
8820 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8821 add_symbol_to_list (sym
, list_to_add
);
8823 else if (!die_is_declaration (die
, cu
))
8825 /* Use the default LOC_OPTIMIZED_OUT class. */
8826 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
8827 add_symbol_to_list (sym
, cu
->list_in_scope
);
8831 case DW_TAG_formal_parameter
:
8832 /* If we are inside a function, mark this as an argument. If
8833 not, we might be looking at an argument to an inlined function
8834 when we do not have enough information to show inlined frames;
8835 pretend it's a local variable in that case so that the user can
8837 if (context_stack_depth
> 0
8838 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
8839 SYMBOL_IS_ARGUMENT (sym
) = 1;
8840 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8843 var_decode_location (attr
, sym
, cu
);
8845 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8848 dwarf2_const_value (attr
, sym
, cu
);
8850 attr
= dwarf2_attr (die
, DW_AT_variable_parameter
, cu
);
8851 if (attr
&& DW_UNSND (attr
))
8853 struct type
*ref_type
;
8855 ref_type
= lookup_reference_type (SYMBOL_TYPE (sym
));
8856 SYMBOL_TYPE (sym
) = ref_type
;
8859 add_symbol_to_list (sym
, cu
->list_in_scope
);
8861 case DW_TAG_unspecified_parameters
:
8862 /* From varargs functions; gdb doesn't seem to have any
8863 interest in this information, so just ignore it for now.
8866 case DW_TAG_class_type
:
8867 case DW_TAG_interface_type
:
8868 case DW_TAG_structure_type
:
8869 case DW_TAG_union_type
:
8870 case DW_TAG_set_type
:
8871 case DW_TAG_enumeration_type
:
8872 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8873 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8876 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8877 really ever be static objects: otherwise, if you try
8878 to, say, break of a class's method and you're in a file
8879 which doesn't mention that class, it won't work unless
8880 the check for all static symbols in lookup_symbol_aux
8881 saves you. See the OtherFileClass tests in
8882 gdb.c++/namespace.exp. */
8884 struct pending
**list_to_add
;
8886 list_to_add
= (cu
->list_in_scope
== &file_symbols
8887 && (cu
->language
== language_cplus
8888 || cu
->language
== language_java
)
8889 ? &global_symbols
: cu
->list_in_scope
);
8891 add_symbol_to_list (sym
, list_to_add
);
8893 /* The semantics of C++ state that "struct foo { ... }" also
8894 defines a typedef for "foo". A Java class declaration also
8895 defines a typedef for the class. */
8896 if (cu
->language
== language_cplus
8897 || cu
->language
== language_java
8898 || cu
->language
== language_ada
)
8900 /* The symbol's name is already allocated along with
8901 this objfile, so we don't need to duplicate it for
8903 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
8904 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
8908 case DW_TAG_typedef
:
8909 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8910 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8911 add_symbol_to_list (sym
, cu
->list_in_scope
);
8913 case DW_TAG_base_type
:
8914 case DW_TAG_subrange_type
:
8915 case DW_TAG_const_type
:
8916 case DW_TAG_volatile_type
:
8917 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8918 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8919 add_symbol_to_list (sym
, cu
->list_in_scope
);
8921 case DW_TAG_enumerator
:
8922 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8925 dwarf2_const_value (attr
, sym
, cu
);
8928 /* NOTE: carlton/2003-11-10: See comment above in the
8929 DW_TAG_class_type, etc. block. */
8931 struct pending
**list_to_add
;
8933 list_to_add
= (cu
->list_in_scope
== &file_symbols
8934 && (cu
->language
== language_cplus
8935 || cu
->language
== language_java
)
8936 ? &global_symbols
: cu
->list_in_scope
);
8938 add_symbol_to_list (sym
, list_to_add
);
8941 case DW_TAG_namespace
:
8942 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8943 add_symbol_to_list (sym
, &global_symbols
);
8946 /* Not a tag we recognize. Hopefully we aren't processing
8947 trash data, but since we must specifically ignore things
8948 we don't recognize, there is nothing else we should do at
8950 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
8951 dwarf_tag_name (die
->tag
));
8955 /* For the benefit of old versions of GCC, check for anonymous
8956 namespaces based on the demangled name. */
8957 if (!processing_has_namespace_info
8958 && cu
->language
== language_cplus
)
8959 cp_scan_for_anonymous_namespaces (sym
);
8964 /* Copy constant value from an attribute to a symbol. */
8967 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
8968 struct dwarf2_cu
*cu
)
8970 struct objfile
*objfile
= cu
->objfile
;
8971 struct comp_unit_head
*cu_header
= &cu
->header
;
8972 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
8973 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
8974 struct dwarf_block
*blk
;
8979 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
8980 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8981 cu_header
->addr_size
,
8982 TYPE_LENGTH (SYMBOL_TYPE
8984 SYMBOL_VALUE_BYTES (sym
) =
8985 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
8986 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8987 it's body - store_unsigned_integer. */
8988 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
8989 byte_order
, DW_ADDR (attr
));
8990 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8992 case DW_FORM_string
:
8994 /* DW_STRING is already allocated on the obstack, point directly
8996 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
8997 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8999 case DW_FORM_block1
:
9000 case DW_FORM_block2
:
9001 case DW_FORM_block4
:
9003 case DW_FORM_exprloc
:
9004 blk
= DW_BLOCK (attr
);
9005 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
9006 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
9008 TYPE_LENGTH (SYMBOL_TYPE
9010 SYMBOL_VALUE_BYTES (sym
) =
9011 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
9012 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
9013 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
9016 /* The DW_AT_const_value attributes are supposed to carry the
9017 symbol's value "represented as it would be on the target
9018 architecture." By the time we get here, it's already been
9019 converted to host endianness, so we just need to sign- or
9020 zero-extend it as appropriate. */
9022 dwarf2_const_value_data (attr
, sym
, 8);
9025 dwarf2_const_value_data (attr
, sym
, 16);
9028 dwarf2_const_value_data (attr
, sym
, 32);
9031 dwarf2_const_value_data (attr
, sym
, 64);
9035 SYMBOL_VALUE (sym
) = DW_SND (attr
);
9036 SYMBOL_CLASS (sym
) = LOC_CONST
;
9040 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
9041 SYMBOL_CLASS (sym
) = LOC_CONST
;
9045 complaint (&symfile_complaints
,
9046 _("unsupported const value attribute form: '%s'"),
9047 dwarf_form_name (attr
->form
));
9048 SYMBOL_VALUE (sym
) = 0;
9049 SYMBOL_CLASS (sym
) = LOC_CONST
;
9055 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
9056 or zero-extend it as appropriate for the symbol's type. */
9058 dwarf2_const_value_data (struct attribute
*attr
,
9062 LONGEST l
= DW_UNSND (attr
);
9064 if (bits
< sizeof (l
) * 8)
9066 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
9067 l
&= ((LONGEST
) 1 << bits
) - 1;
9069 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
9072 SYMBOL_VALUE (sym
) = l
;
9073 SYMBOL_CLASS (sym
) = LOC_CONST
;
9077 /* Return the type of the die in question using its DW_AT_type attribute. */
9079 static struct type
*
9080 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9082 struct attribute
*type_attr
;
9083 struct die_info
*type_die
;
9085 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
9088 /* A missing DW_AT_type represents a void type. */
9089 return objfile_type (cu
->objfile
)->builtin_void
;
9092 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
9094 return tag_type_to_type (type_die
, cu
);
9097 /* True iff CU's producer generates GNAT Ada auxiliary information
9098 that allows to find parallel types through that information instead
9099 of having to do expensive parallel lookups by type name. */
9102 need_gnat_info (struct dwarf2_cu
*cu
)
9104 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
9105 of GNAT produces this auxiliary information, without any indication
9106 that it is produced. Part of enhancing the FSF version of GNAT
9107 to produce that information will be to put in place an indicator
9108 that we can use in order to determine whether the descriptive type
9109 info is available or not. One suggestion that has been made is
9110 to use a new attribute, attached to the CU die. For now, assume
9111 that the descriptive type info is not available. */
9116 /* Return the auxiliary type of the die in question using its
9117 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
9118 attribute is not present. */
9120 static struct type
*
9121 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9123 struct attribute
*type_attr
;
9124 struct die_info
*type_die
;
9126 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
9130 type_die
= follow_die_ref (die
, type_attr
, &cu
);
9131 return tag_type_to_type (type_die
, cu
);
9134 /* If DIE has a descriptive_type attribute, then set the TYPE's
9135 descriptive type accordingly. */
9138 set_descriptive_type (struct type
*type
, struct die_info
*die
,
9139 struct dwarf2_cu
*cu
)
9141 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
9143 if (descriptive_type
)
9145 ALLOCATE_GNAT_AUX_TYPE (type
);
9146 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
9150 /* Return the containing type of the die in question using its
9151 DW_AT_containing_type attribute. */
9153 static struct type
*
9154 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9156 struct attribute
*type_attr
;
9157 struct die_info
*type_die
;
9159 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
9161 error (_("Dwarf Error: Problem turning containing type into gdb type "
9162 "[in module %s]"), cu
->objfile
->name
);
9164 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
9165 return tag_type_to_type (type_die
, cu
);
9168 static struct type
*
9169 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9171 struct type
*this_type
;
9173 this_type
= read_type_die (die
, cu
);
9176 char *message
, *saved
;
9178 /* read_type_die already issued a complaint. */
9179 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
9183 saved
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
9184 message
, strlen (message
));
9187 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, cu
->objfile
);
9192 static struct type
*
9193 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9195 struct type
*this_type
;
9197 this_type
= get_die_type (die
, cu
);
9203 case DW_TAG_class_type
:
9204 case DW_TAG_interface_type
:
9205 case DW_TAG_structure_type
:
9206 case DW_TAG_union_type
:
9207 this_type
= read_structure_type (die
, cu
);
9209 case DW_TAG_enumeration_type
:
9210 this_type
= read_enumeration_type (die
, cu
);
9212 case DW_TAG_subprogram
:
9213 case DW_TAG_subroutine_type
:
9214 case DW_TAG_inlined_subroutine
:
9215 this_type
= read_subroutine_type (die
, cu
);
9217 case DW_TAG_array_type
:
9218 this_type
= read_array_type (die
, cu
);
9220 case DW_TAG_set_type
:
9221 this_type
= read_set_type (die
, cu
);
9223 case DW_TAG_pointer_type
:
9224 this_type
= read_tag_pointer_type (die
, cu
);
9226 case DW_TAG_ptr_to_member_type
:
9227 this_type
= read_tag_ptr_to_member_type (die
, cu
);
9229 case DW_TAG_reference_type
:
9230 this_type
= read_tag_reference_type (die
, cu
);
9232 case DW_TAG_const_type
:
9233 this_type
= read_tag_const_type (die
, cu
);
9235 case DW_TAG_volatile_type
:
9236 this_type
= read_tag_volatile_type (die
, cu
);
9238 case DW_TAG_string_type
:
9239 this_type
= read_tag_string_type (die
, cu
);
9241 case DW_TAG_typedef
:
9242 this_type
= read_typedef (die
, cu
);
9244 case DW_TAG_subrange_type
:
9245 this_type
= read_subrange_type (die
, cu
);
9247 case DW_TAG_base_type
:
9248 this_type
= read_base_type (die
, cu
);
9250 case DW_TAG_unspecified_type
:
9251 this_type
= read_unspecified_type (die
, cu
);
9253 case DW_TAG_namespace
:
9254 this_type
= read_namespace_type (die
, cu
);
9257 this_type
= read_module_type (die
, cu
);
9260 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
9261 dwarf_tag_name (die
->tag
));
9268 /* Return the name of the namespace/class that DIE is defined within,
9269 or "" if we can't tell. The caller should not xfree the result.
9271 For example, if we're within the method foo() in the following
9281 then determine_prefix on foo's die will return "N::C". */
9284 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
9286 struct die_info
*parent
, *spec_die
;
9287 struct dwarf2_cu
*spec_cu
;
9288 struct type
*parent_type
;
9290 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
9291 && cu
->language
!= language_fortran
)
9294 /* We have to be careful in the presence of DW_AT_specification.
9295 For example, with GCC 3.4, given the code
9299 // Definition of N::foo.
9303 then we'll have a tree of DIEs like this:
9305 1: DW_TAG_compile_unit
9306 2: DW_TAG_namespace // N
9307 3: DW_TAG_subprogram // declaration of N::foo
9308 4: DW_TAG_subprogram // definition of N::foo
9309 DW_AT_specification // refers to die #3
9311 Thus, when processing die #4, we have to pretend that we're in
9312 the context of its DW_AT_specification, namely the contex of die
9315 spec_die
= die_specification (die
, &spec_cu
);
9316 if (spec_die
== NULL
)
9317 parent
= die
->parent
;
9320 parent
= spec_die
->parent
;
9327 switch (parent
->tag
)
9329 case DW_TAG_namespace
:
9330 parent_type
= read_type_die (parent
, cu
);
9331 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
9332 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
9333 Work around this problem here. */
9334 if (cu
->language
== language_cplus
9335 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
9337 /* We give a name to even anonymous namespaces. */
9338 return TYPE_TAG_NAME (parent_type
);
9339 case DW_TAG_class_type
:
9340 case DW_TAG_interface_type
:
9341 case DW_TAG_structure_type
:
9342 case DW_TAG_union_type
:
9344 parent_type
= read_type_die (parent
, cu
);
9345 if (TYPE_TAG_NAME (parent_type
) != NULL
)
9346 return TYPE_TAG_NAME (parent_type
);
9348 /* An anonymous structure is only allowed non-static data
9349 members; no typedefs, no member functions, et cetera.
9350 So it does not need a prefix. */
9353 return determine_prefix (parent
, cu
);
9357 /* Return a newly-allocated string formed by concatenating PREFIX and
9358 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
9359 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
9360 perform an obconcat, otherwise allocate storage for the result. The CU argument
9361 is used to determine the language and hence, the appropriate separator. */
9363 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
9366 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
9367 int physname
, struct dwarf2_cu
*cu
)
9369 const char *lead
= "";
9372 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
9374 else if (cu
->language
== language_java
)
9376 else if (cu
->language
== language_fortran
&& physname
)
9378 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
9379 DW_AT_MIPS_linkage_name is preferred and used instead. */
9394 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
9396 strcpy (retval
, lead
);
9397 strcat (retval
, prefix
);
9398 strcat (retval
, sep
);
9399 strcat (retval
, suffix
);
9404 /* We have an obstack. */
9405 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
9409 /* Return sibling of die, NULL if no sibling. */
9411 static struct die_info
*
9412 sibling_die (struct die_info
*die
)
9414 return die
->sibling
;
9417 /* Get name of a die, return NULL if not found. */
9420 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
9421 struct obstack
*obstack
)
9423 if (name
&& cu
->language
== language_cplus
)
9425 char *canon_name
= cp_canonicalize_string (name
);
9427 if (canon_name
!= NULL
)
9429 if (strcmp (canon_name
, name
) != 0)
9430 name
= obsavestring (canon_name
, strlen (canon_name
),
9439 /* Get name of a die, return NULL if not found. */
9442 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9444 struct attribute
*attr
;
9446 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9447 if (!attr
|| !DW_STRING (attr
))
9452 case DW_TAG_compile_unit
:
9453 /* Compilation units have a DW_AT_name that is a filename, not
9454 a source language identifier. */
9455 case DW_TAG_enumeration_type
:
9456 case DW_TAG_enumerator
:
9457 /* These tags always have simple identifiers already; no need
9458 to canonicalize them. */
9459 return DW_STRING (attr
);
9461 case DW_TAG_subprogram
:
9462 /* Java constructors will all be named "<init>", so return
9463 the class name when we see this special case. */
9464 if (cu
->language
== language_java
9465 && DW_STRING (attr
) != NULL
9466 && strcmp (DW_STRING (attr
), "<init>") == 0)
9468 struct dwarf2_cu
*spec_cu
= cu
;
9469 struct die_info
*spec_die
;
9471 /* GCJ will output '<init>' for Java constructor names.
9472 For this special case, return the name of the parent class. */
9474 /* GCJ may output suprogram DIEs with AT_specification set.
9475 If so, use the name of the specified DIE. */
9476 spec_die
= die_specification (die
, &spec_cu
);
9477 if (spec_die
!= NULL
)
9478 return dwarf2_name (spec_die
, spec_cu
);
9483 if (die
->tag
== DW_TAG_class_type
)
9484 return dwarf2_name (die
, cu
);
9486 while (die
->tag
!= DW_TAG_compile_unit
);
9490 case DW_TAG_class_type
:
9491 case DW_TAG_interface_type
:
9492 case DW_TAG_structure_type
:
9493 case DW_TAG_union_type
:
9494 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
9495 structures or unions. These were of the form "._%d" in GCC 4.1,
9496 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
9497 and GCC 4.4. We work around this problem by ignoring these. */
9498 if (strncmp (DW_STRING (attr
), "._", 2) == 0
9499 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
9507 if (!DW_STRING_IS_CANONICAL (attr
))
9510 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
9511 &cu
->objfile
->objfile_obstack
);
9512 DW_STRING_IS_CANONICAL (attr
) = 1;
9514 return DW_STRING (attr
);
9517 /* Return the die that this die in an extension of, or NULL if there
9518 is none. *EXT_CU is the CU containing DIE on input, and the CU
9519 containing the return value on output. */
9521 static struct die_info
*
9522 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
9524 struct attribute
*attr
;
9526 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
9530 return follow_die_ref (die
, attr
, ext_cu
);
9533 /* Convert a DIE tag into its string name. */
9536 dwarf_tag_name (unsigned tag
)
9540 case DW_TAG_padding
:
9541 return "DW_TAG_padding";
9542 case DW_TAG_array_type
:
9543 return "DW_TAG_array_type";
9544 case DW_TAG_class_type
:
9545 return "DW_TAG_class_type";
9546 case DW_TAG_entry_point
:
9547 return "DW_TAG_entry_point";
9548 case DW_TAG_enumeration_type
:
9549 return "DW_TAG_enumeration_type";
9550 case DW_TAG_formal_parameter
:
9551 return "DW_TAG_formal_parameter";
9552 case DW_TAG_imported_declaration
:
9553 return "DW_TAG_imported_declaration";
9555 return "DW_TAG_label";
9556 case DW_TAG_lexical_block
:
9557 return "DW_TAG_lexical_block";
9559 return "DW_TAG_member";
9560 case DW_TAG_pointer_type
:
9561 return "DW_TAG_pointer_type";
9562 case DW_TAG_reference_type
:
9563 return "DW_TAG_reference_type";
9564 case DW_TAG_compile_unit
:
9565 return "DW_TAG_compile_unit";
9566 case DW_TAG_string_type
:
9567 return "DW_TAG_string_type";
9568 case DW_TAG_structure_type
:
9569 return "DW_TAG_structure_type";
9570 case DW_TAG_subroutine_type
:
9571 return "DW_TAG_subroutine_type";
9572 case DW_TAG_typedef
:
9573 return "DW_TAG_typedef";
9574 case DW_TAG_union_type
:
9575 return "DW_TAG_union_type";
9576 case DW_TAG_unspecified_parameters
:
9577 return "DW_TAG_unspecified_parameters";
9578 case DW_TAG_variant
:
9579 return "DW_TAG_variant";
9580 case DW_TAG_common_block
:
9581 return "DW_TAG_common_block";
9582 case DW_TAG_common_inclusion
:
9583 return "DW_TAG_common_inclusion";
9584 case DW_TAG_inheritance
:
9585 return "DW_TAG_inheritance";
9586 case DW_TAG_inlined_subroutine
:
9587 return "DW_TAG_inlined_subroutine";
9589 return "DW_TAG_module";
9590 case DW_TAG_ptr_to_member_type
:
9591 return "DW_TAG_ptr_to_member_type";
9592 case DW_TAG_set_type
:
9593 return "DW_TAG_set_type";
9594 case DW_TAG_subrange_type
:
9595 return "DW_TAG_subrange_type";
9596 case DW_TAG_with_stmt
:
9597 return "DW_TAG_with_stmt";
9598 case DW_TAG_access_declaration
:
9599 return "DW_TAG_access_declaration";
9600 case DW_TAG_base_type
:
9601 return "DW_TAG_base_type";
9602 case DW_TAG_catch_block
:
9603 return "DW_TAG_catch_block";
9604 case DW_TAG_const_type
:
9605 return "DW_TAG_const_type";
9606 case DW_TAG_constant
:
9607 return "DW_TAG_constant";
9608 case DW_TAG_enumerator
:
9609 return "DW_TAG_enumerator";
9610 case DW_TAG_file_type
:
9611 return "DW_TAG_file_type";
9613 return "DW_TAG_friend";
9614 case DW_TAG_namelist
:
9615 return "DW_TAG_namelist";
9616 case DW_TAG_namelist_item
:
9617 return "DW_TAG_namelist_item";
9618 case DW_TAG_packed_type
:
9619 return "DW_TAG_packed_type";
9620 case DW_TAG_subprogram
:
9621 return "DW_TAG_subprogram";
9622 case DW_TAG_template_type_param
:
9623 return "DW_TAG_template_type_param";
9624 case DW_TAG_template_value_param
:
9625 return "DW_TAG_template_value_param";
9626 case DW_TAG_thrown_type
:
9627 return "DW_TAG_thrown_type";
9628 case DW_TAG_try_block
:
9629 return "DW_TAG_try_block";
9630 case DW_TAG_variant_part
:
9631 return "DW_TAG_variant_part";
9632 case DW_TAG_variable
:
9633 return "DW_TAG_variable";
9634 case DW_TAG_volatile_type
:
9635 return "DW_TAG_volatile_type";
9636 case DW_TAG_dwarf_procedure
:
9637 return "DW_TAG_dwarf_procedure";
9638 case DW_TAG_restrict_type
:
9639 return "DW_TAG_restrict_type";
9640 case DW_TAG_interface_type
:
9641 return "DW_TAG_interface_type";
9642 case DW_TAG_namespace
:
9643 return "DW_TAG_namespace";
9644 case DW_TAG_imported_module
:
9645 return "DW_TAG_imported_module";
9646 case DW_TAG_unspecified_type
:
9647 return "DW_TAG_unspecified_type";
9648 case DW_TAG_partial_unit
:
9649 return "DW_TAG_partial_unit";
9650 case DW_TAG_imported_unit
:
9651 return "DW_TAG_imported_unit";
9652 case DW_TAG_condition
:
9653 return "DW_TAG_condition";
9654 case DW_TAG_shared_type
:
9655 return "DW_TAG_shared_type";
9656 case DW_TAG_type_unit
:
9657 return "DW_TAG_type_unit";
9658 case DW_TAG_MIPS_loop
:
9659 return "DW_TAG_MIPS_loop";
9660 case DW_TAG_HP_array_descriptor
:
9661 return "DW_TAG_HP_array_descriptor";
9662 case DW_TAG_format_label
:
9663 return "DW_TAG_format_label";
9664 case DW_TAG_function_template
:
9665 return "DW_TAG_function_template";
9666 case DW_TAG_class_template
:
9667 return "DW_TAG_class_template";
9668 case DW_TAG_GNU_BINCL
:
9669 return "DW_TAG_GNU_BINCL";
9670 case DW_TAG_GNU_EINCL
:
9671 return "DW_TAG_GNU_EINCL";
9672 case DW_TAG_upc_shared_type
:
9673 return "DW_TAG_upc_shared_type";
9674 case DW_TAG_upc_strict_type
:
9675 return "DW_TAG_upc_strict_type";
9676 case DW_TAG_upc_relaxed_type
:
9677 return "DW_TAG_upc_relaxed_type";
9678 case DW_TAG_PGI_kanji_type
:
9679 return "DW_TAG_PGI_kanji_type";
9680 case DW_TAG_PGI_interface_block
:
9681 return "DW_TAG_PGI_interface_block";
9683 return "DW_TAG_<unknown>";
9687 /* Convert a DWARF attribute code into its string name. */
9690 dwarf_attr_name (unsigned attr
)
9695 return "DW_AT_sibling";
9696 case DW_AT_location
:
9697 return "DW_AT_location";
9699 return "DW_AT_name";
9700 case DW_AT_ordering
:
9701 return "DW_AT_ordering";
9702 case DW_AT_subscr_data
:
9703 return "DW_AT_subscr_data";
9704 case DW_AT_byte_size
:
9705 return "DW_AT_byte_size";
9706 case DW_AT_bit_offset
:
9707 return "DW_AT_bit_offset";
9708 case DW_AT_bit_size
:
9709 return "DW_AT_bit_size";
9710 case DW_AT_element_list
:
9711 return "DW_AT_element_list";
9712 case DW_AT_stmt_list
:
9713 return "DW_AT_stmt_list";
9715 return "DW_AT_low_pc";
9717 return "DW_AT_high_pc";
9718 case DW_AT_language
:
9719 return "DW_AT_language";
9721 return "DW_AT_member";
9723 return "DW_AT_discr";
9724 case DW_AT_discr_value
:
9725 return "DW_AT_discr_value";
9726 case DW_AT_visibility
:
9727 return "DW_AT_visibility";
9729 return "DW_AT_import";
9730 case DW_AT_string_length
:
9731 return "DW_AT_string_length";
9732 case DW_AT_common_reference
:
9733 return "DW_AT_common_reference";
9734 case DW_AT_comp_dir
:
9735 return "DW_AT_comp_dir";
9736 case DW_AT_const_value
:
9737 return "DW_AT_const_value";
9738 case DW_AT_containing_type
:
9739 return "DW_AT_containing_type";
9740 case DW_AT_default_value
:
9741 return "DW_AT_default_value";
9743 return "DW_AT_inline";
9744 case DW_AT_is_optional
:
9745 return "DW_AT_is_optional";
9746 case DW_AT_lower_bound
:
9747 return "DW_AT_lower_bound";
9748 case DW_AT_producer
:
9749 return "DW_AT_producer";
9750 case DW_AT_prototyped
:
9751 return "DW_AT_prototyped";
9752 case DW_AT_return_addr
:
9753 return "DW_AT_return_addr";
9754 case DW_AT_start_scope
:
9755 return "DW_AT_start_scope";
9756 case DW_AT_bit_stride
:
9757 return "DW_AT_bit_stride";
9758 case DW_AT_upper_bound
:
9759 return "DW_AT_upper_bound";
9760 case DW_AT_abstract_origin
:
9761 return "DW_AT_abstract_origin";
9762 case DW_AT_accessibility
:
9763 return "DW_AT_accessibility";
9764 case DW_AT_address_class
:
9765 return "DW_AT_address_class";
9766 case DW_AT_artificial
:
9767 return "DW_AT_artificial";
9768 case DW_AT_base_types
:
9769 return "DW_AT_base_types";
9770 case DW_AT_calling_convention
:
9771 return "DW_AT_calling_convention";
9773 return "DW_AT_count";
9774 case DW_AT_data_member_location
:
9775 return "DW_AT_data_member_location";
9776 case DW_AT_decl_column
:
9777 return "DW_AT_decl_column";
9778 case DW_AT_decl_file
:
9779 return "DW_AT_decl_file";
9780 case DW_AT_decl_line
:
9781 return "DW_AT_decl_line";
9782 case DW_AT_declaration
:
9783 return "DW_AT_declaration";
9784 case DW_AT_discr_list
:
9785 return "DW_AT_discr_list";
9786 case DW_AT_encoding
:
9787 return "DW_AT_encoding";
9788 case DW_AT_external
:
9789 return "DW_AT_external";
9790 case DW_AT_frame_base
:
9791 return "DW_AT_frame_base";
9793 return "DW_AT_friend";
9794 case DW_AT_identifier_case
:
9795 return "DW_AT_identifier_case";
9796 case DW_AT_macro_info
:
9797 return "DW_AT_macro_info";
9798 case DW_AT_namelist_items
:
9799 return "DW_AT_namelist_items";
9800 case DW_AT_priority
:
9801 return "DW_AT_priority";
9803 return "DW_AT_segment";
9804 case DW_AT_specification
:
9805 return "DW_AT_specification";
9806 case DW_AT_static_link
:
9807 return "DW_AT_static_link";
9809 return "DW_AT_type";
9810 case DW_AT_use_location
:
9811 return "DW_AT_use_location";
9812 case DW_AT_variable_parameter
:
9813 return "DW_AT_variable_parameter";
9814 case DW_AT_virtuality
:
9815 return "DW_AT_virtuality";
9816 case DW_AT_vtable_elem_location
:
9817 return "DW_AT_vtable_elem_location";
9818 /* DWARF 3 values. */
9819 case DW_AT_allocated
:
9820 return "DW_AT_allocated";
9821 case DW_AT_associated
:
9822 return "DW_AT_associated";
9823 case DW_AT_data_location
:
9824 return "DW_AT_data_location";
9825 case DW_AT_byte_stride
:
9826 return "DW_AT_byte_stride";
9827 case DW_AT_entry_pc
:
9828 return "DW_AT_entry_pc";
9829 case DW_AT_use_UTF8
:
9830 return "DW_AT_use_UTF8";
9831 case DW_AT_extension
:
9832 return "DW_AT_extension";
9834 return "DW_AT_ranges";
9835 case DW_AT_trampoline
:
9836 return "DW_AT_trampoline";
9837 case DW_AT_call_column
:
9838 return "DW_AT_call_column";
9839 case DW_AT_call_file
:
9840 return "DW_AT_call_file";
9841 case DW_AT_call_line
:
9842 return "DW_AT_call_line";
9843 case DW_AT_description
:
9844 return "DW_AT_description";
9845 case DW_AT_binary_scale
:
9846 return "DW_AT_binary_scale";
9847 case DW_AT_decimal_scale
:
9848 return "DW_AT_decimal_scale";
9850 return "DW_AT_small";
9851 case DW_AT_decimal_sign
:
9852 return "DW_AT_decimal_sign";
9853 case DW_AT_digit_count
:
9854 return "DW_AT_digit_count";
9855 case DW_AT_picture_string
:
9856 return "DW_AT_picture_string";
9858 return "DW_AT_mutable";
9859 case DW_AT_threads_scaled
:
9860 return "DW_AT_threads_scaled";
9861 case DW_AT_explicit
:
9862 return "DW_AT_explicit";
9863 case DW_AT_object_pointer
:
9864 return "DW_AT_object_pointer";
9865 case DW_AT_endianity
:
9866 return "DW_AT_endianity";
9867 case DW_AT_elemental
:
9868 return "DW_AT_elemental";
9870 return "DW_AT_pure";
9871 case DW_AT_recursive
:
9872 return "DW_AT_recursive";
9873 /* DWARF 4 values. */
9874 case DW_AT_signature
:
9875 return "DW_AT_signature";
9876 case DW_AT_linkage_name
:
9877 return "DW_AT_linkage_name";
9878 /* SGI/MIPS extensions. */
9879 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9880 case DW_AT_MIPS_fde
:
9881 return "DW_AT_MIPS_fde";
9883 case DW_AT_MIPS_loop_begin
:
9884 return "DW_AT_MIPS_loop_begin";
9885 case DW_AT_MIPS_tail_loop_begin
:
9886 return "DW_AT_MIPS_tail_loop_begin";
9887 case DW_AT_MIPS_epilog_begin
:
9888 return "DW_AT_MIPS_epilog_begin";
9889 case DW_AT_MIPS_loop_unroll_factor
:
9890 return "DW_AT_MIPS_loop_unroll_factor";
9891 case DW_AT_MIPS_software_pipeline_depth
:
9892 return "DW_AT_MIPS_software_pipeline_depth";
9893 case DW_AT_MIPS_linkage_name
:
9894 return "DW_AT_MIPS_linkage_name";
9895 case DW_AT_MIPS_stride
:
9896 return "DW_AT_MIPS_stride";
9897 case DW_AT_MIPS_abstract_name
:
9898 return "DW_AT_MIPS_abstract_name";
9899 case DW_AT_MIPS_clone_origin
:
9900 return "DW_AT_MIPS_clone_origin";
9901 case DW_AT_MIPS_has_inlines
:
9902 return "DW_AT_MIPS_has_inlines";
9903 /* HP extensions. */
9904 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9905 case DW_AT_HP_block_index
:
9906 return "DW_AT_HP_block_index";
9908 case DW_AT_HP_unmodifiable
:
9909 return "DW_AT_HP_unmodifiable";
9910 case DW_AT_HP_actuals_stmt_list
:
9911 return "DW_AT_HP_actuals_stmt_list";
9912 case DW_AT_HP_proc_per_section
:
9913 return "DW_AT_HP_proc_per_section";
9914 case DW_AT_HP_raw_data_ptr
:
9915 return "DW_AT_HP_raw_data_ptr";
9916 case DW_AT_HP_pass_by_reference
:
9917 return "DW_AT_HP_pass_by_reference";
9918 case DW_AT_HP_opt_level
:
9919 return "DW_AT_HP_opt_level";
9920 case DW_AT_HP_prof_version_id
:
9921 return "DW_AT_HP_prof_version_id";
9922 case DW_AT_HP_opt_flags
:
9923 return "DW_AT_HP_opt_flags";
9924 case DW_AT_HP_cold_region_low_pc
:
9925 return "DW_AT_HP_cold_region_low_pc";
9926 case DW_AT_HP_cold_region_high_pc
:
9927 return "DW_AT_HP_cold_region_high_pc";
9928 case DW_AT_HP_all_variables_modifiable
:
9929 return "DW_AT_HP_all_variables_modifiable";
9930 case DW_AT_HP_linkage_name
:
9931 return "DW_AT_HP_linkage_name";
9932 case DW_AT_HP_prof_flags
:
9933 return "DW_AT_HP_prof_flags";
9934 /* GNU extensions. */
9935 case DW_AT_sf_names
:
9936 return "DW_AT_sf_names";
9937 case DW_AT_src_info
:
9938 return "DW_AT_src_info";
9939 case DW_AT_mac_info
:
9940 return "DW_AT_mac_info";
9941 case DW_AT_src_coords
:
9942 return "DW_AT_src_coords";
9943 case DW_AT_body_begin
:
9944 return "DW_AT_body_begin";
9945 case DW_AT_body_end
:
9946 return "DW_AT_body_end";
9947 case DW_AT_GNU_vector
:
9948 return "DW_AT_GNU_vector";
9949 /* VMS extensions. */
9950 case DW_AT_VMS_rtnbeg_pd_address
:
9951 return "DW_AT_VMS_rtnbeg_pd_address";
9952 /* UPC extension. */
9953 case DW_AT_upc_threads_scaled
:
9954 return "DW_AT_upc_threads_scaled";
9955 /* PGI (STMicroelectronics) extensions. */
9956 case DW_AT_PGI_lbase
:
9957 return "DW_AT_PGI_lbase";
9958 case DW_AT_PGI_soffset
:
9959 return "DW_AT_PGI_soffset";
9960 case DW_AT_PGI_lstride
:
9961 return "DW_AT_PGI_lstride";
9963 return "DW_AT_<unknown>";
9967 /* Convert a DWARF value form code into its string name. */
9970 dwarf_form_name (unsigned form
)
9975 return "DW_FORM_addr";
9976 case DW_FORM_block2
:
9977 return "DW_FORM_block2";
9978 case DW_FORM_block4
:
9979 return "DW_FORM_block4";
9981 return "DW_FORM_data2";
9983 return "DW_FORM_data4";
9985 return "DW_FORM_data8";
9986 case DW_FORM_string
:
9987 return "DW_FORM_string";
9989 return "DW_FORM_block";
9990 case DW_FORM_block1
:
9991 return "DW_FORM_block1";
9993 return "DW_FORM_data1";
9995 return "DW_FORM_flag";
9997 return "DW_FORM_sdata";
9999 return "DW_FORM_strp";
10000 case DW_FORM_udata
:
10001 return "DW_FORM_udata";
10002 case DW_FORM_ref_addr
:
10003 return "DW_FORM_ref_addr";
10005 return "DW_FORM_ref1";
10007 return "DW_FORM_ref2";
10009 return "DW_FORM_ref4";
10011 return "DW_FORM_ref8";
10012 case DW_FORM_ref_udata
:
10013 return "DW_FORM_ref_udata";
10014 case DW_FORM_indirect
:
10015 return "DW_FORM_indirect";
10016 case DW_FORM_sec_offset
:
10017 return "DW_FORM_sec_offset";
10018 case DW_FORM_exprloc
:
10019 return "DW_FORM_exprloc";
10020 case DW_FORM_flag_present
:
10021 return "DW_FORM_flag_present";
10023 return "DW_FORM_sig8";
10025 return "DW_FORM_<unknown>";
10029 /* Convert a DWARF stack opcode into its string name. */
10032 dwarf_stack_op_name (unsigned op
, int def
)
10037 return "DW_OP_addr";
10039 return "DW_OP_deref";
10040 case DW_OP_const1u
:
10041 return "DW_OP_const1u";
10042 case DW_OP_const1s
:
10043 return "DW_OP_const1s";
10044 case DW_OP_const2u
:
10045 return "DW_OP_const2u";
10046 case DW_OP_const2s
:
10047 return "DW_OP_const2s";
10048 case DW_OP_const4u
:
10049 return "DW_OP_const4u";
10050 case DW_OP_const4s
:
10051 return "DW_OP_const4s";
10052 case DW_OP_const8u
:
10053 return "DW_OP_const8u";
10054 case DW_OP_const8s
:
10055 return "DW_OP_const8s";
10057 return "DW_OP_constu";
10059 return "DW_OP_consts";
10061 return "DW_OP_dup";
10063 return "DW_OP_drop";
10065 return "DW_OP_over";
10067 return "DW_OP_pick";
10069 return "DW_OP_swap";
10071 return "DW_OP_rot";
10073 return "DW_OP_xderef";
10075 return "DW_OP_abs";
10077 return "DW_OP_and";
10079 return "DW_OP_div";
10081 return "DW_OP_minus";
10083 return "DW_OP_mod";
10085 return "DW_OP_mul";
10087 return "DW_OP_neg";
10089 return "DW_OP_not";
10093 return "DW_OP_plus";
10094 case DW_OP_plus_uconst
:
10095 return "DW_OP_plus_uconst";
10097 return "DW_OP_shl";
10099 return "DW_OP_shr";
10101 return "DW_OP_shra";
10103 return "DW_OP_xor";
10105 return "DW_OP_bra";
10119 return "DW_OP_skip";
10121 return "DW_OP_lit0";
10123 return "DW_OP_lit1";
10125 return "DW_OP_lit2";
10127 return "DW_OP_lit3";
10129 return "DW_OP_lit4";
10131 return "DW_OP_lit5";
10133 return "DW_OP_lit6";
10135 return "DW_OP_lit7";
10137 return "DW_OP_lit8";
10139 return "DW_OP_lit9";
10141 return "DW_OP_lit10";
10143 return "DW_OP_lit11";
10145 return "DW_OP_lit12";
10147 return "DW_OP_lit13";
10149 return "DW_OP_lit14";
10151 return "DW_OP_lit15";
10153 return "DW_OP_lit16";
10155 return "DW_OP_lit17";
10157 return "DW_OP_lit18";
10159 return "DW_OP_lit19";
10161 return "DW_OP_lit20";
10163 return "DW_OP_lit21";
10165 return "DW_OP_lit22";
10167 return "DW_OP_lit23";
10169 return "DW_OP_lit24";
10171 return "DW_OP_lit25";
10173 return "DW_OP_lit26";
10175 return "DW_OP_lit27";
10177 return "DW_OP_lit28";
10179 return "DW_OP_lit29";
10181 return "DW_OP_lit30";
10183 return "DW_OP_lit31";
10185 return "DW_OP_reg0";
10187 return "DW_OP_reg1";
10189 return "DW_OP_reg2";
10191 return "DW_OP_reg3";
10193 return "DW_OP_reg4";
10195 return "DW_OP_reg5";
10197 return "DW_OP_reg6";
10199 return "DW_OP_reg7";
10201 return "DW_OP_reg8";
10203 return "DW_OP_reg9";
10205 return "DW_OP_reg10";
10207 return "DW_OP_reg11";
10209 return "DW_OP_reg12";
10211 return "DW_OP_reg13";
10213 return "DW_OP_reg14";
10215 return "DW_OP_reg15";
10217 return "DW_OP_reg16";
10219 return "DW_OP_reg17";
10221 return "DW_OP_reg18";
10223 return "DW_OP_reg19";
10225 return "DW_OP_reg20";
10227 return "DW_OP_reg21";
10229 return "DW_OP_reg22";
10231 return "DW_OP_reg23";
10233 return "DW_OP_reg24";
10235 return "DW_OP_reg25";
10237 return "DW_OP_reg26";
10239 return "DW_OP_reg27";
10241 return "DW_OP_reg28";
10243 return "DW_OP_reg29";
10245 return "DW_OP_reg30";
10247 return "DW_OP_reg31";
10249 return "DW_OP_breg0";
10251 return "DW_OP_breg1";
10253 return "DW_OP_breg2";
10255 return "DW_OP_breg3";
10257 return "DW_OP_breg4";
10259 return "DW_OP_breg5";
10261 return "DW_OP_breg6";
10263 return "DW_OP_breg7";
10265 return "DW_OP_breg8";
10267 return "DW_OP_breg9";
10269 return "DW_OP_breg10";
10271 return "DW_OP_breg11";
10273 return "DW_OP_breg12";
10275 return "DW_OP_breg13";
10277 return "DW_OP_breg14";
10279 return "DW_OP_breg15";
10281 return "DW_OP_breg16";
10283 return "DW_OP_breg17";
10285 return "DW_OP_breg18";
10287 return "DW_OP_breg19";
10289 return "DW_OP_breg20";
10291 return "DW_OP_breg21";
10293 return "DW_OP_breg22";
10295 return "DW_OP_breg23";
10297 return "DW_OP_breg24";
10299 return "DW_OP_breg25";
10301 return "DW_OP_breg26";
10303 return "DW_OP_breg27";
10305 return "DW_OP_breg28";
10307 return "DW_OP_breg29";
10309 return "DW_OP_breg30";
10311 return "DW_OP_breg31";
10313 return "DW_OP_regx";
10315 return "DW_OP_fbreg";
10317 return "DW_OP_bregx";
10319 return "DW_OP_piece";
10320 case DW_OP_deref_size
:
10321 return "DW_OP_deref_size";
10322 case DW_OP_xderef_size
:
10323 return "DW_OP_xderef_size";
10325 return "DW_OP_nop";
10326 /* DWARF 3 extensions. */
10327 case DW_OP_push_object_address
:
10328 return "DW_OP_push_object_address";
10330 return "DW_OP_call2";
10332 return "DW_OP_call4";
10333 case DW_OP_call_ref
:
10334 return "DW_OP_call_ref";
10335 case DW_OP_form_tls_address
:
10336 return "DW_OP_form_tls_address";
10337 case DW_OP_call_frame_cfa
:
10338 return "DW_OP_call_frame_cfa";
10339 case DW_OP_bit_piece
:
10340 return "DW_OP_bit_piece";
10341 /* DWARF 4 extensions. */
10342 case DW_OP_implicit_value
:
10343 return "DW_OP_implicit_value";
10344 case DW_OP_stack_value
:
10345 return "DW_OP_stack_value";
10346 /* GNU extensions. */
10347 case DW_OP_GNU_push_tls_address
:
10348 return "DW_OP_GNU_push_tls_address";
10349 case DW_OP_GNU_uninit
:
10350 return "DW_OP_GNU_uninit";
10352 return def
? "OP_<unknown>" : NULL
;
10357 dwarf_bool_name (unsigned mybool
)
10365 /* Convert a DWARF type code into its string name. */
10368 dwarf_type_encoding_name (unsigned enc
)
10373 return "DW_ATE_void";
10374 case DW_ATE_address
:
10375 return "DW_ATE_address";
10376 case DW_ATE_boolean
:
10377 return "DW_ATE_boolean";
10378 case DW_ATE_complex_float
:
10379 return "DW_ATE_complex_float";
10381 return "DW_ATE_float";
10382 case DW_ATE_signed
:
10383 return "DW_ATE_signed";
10384 case DW_ATE_signed_char
:
10385 return "DW_ATE_signed_char";
10386 case DW_ATE_unsigned
:
10387 return "DW_ATE_unsigned";
10388 case DW_ATE_unsigned_char
:
10389 return "DW_ATE_unsigned_char";
10391 case DW_ATE_imaginary_float
:
10392 return "DW_ATE_imaginary_float";
10393 case DW_ATE_packed_decimal
:
10394 return "DW_ATE_packed_decimal";
10395 case DW_ATE_numeric_string
:
10396 return "DW_ATE_numeric_string";
10397 case DW_ATE_edited
:
10398 return "DW_ATE_edited";
10399 case DW_ATE_signed_fixed
:
10400 return "DW_ATE_signed_fixed";
10401 case DW_ATE_unsigned_fixed
:
10402 return "DW_ATE_unsigned_fixed";
10403 case DW_ATE_decimal_float
:
10404 return "DW_ATE_decimal_float";
10405 /* HP extensions. */
10406 case DW_ATE_HP_float80
:
10407 return "DW_ATE_HP_float80";
10408 case DW_ATE_HP_complex_float80
:
10409 return "DW_ATE_HP_complex_float80";
10410 case DW_ATE_HP_float128
:
10411 return "DW_ATE_HP_float128";
10412 case DW_ATE_HP_complex_float128
:
10413 return "DW_ATE_HP_complex_float128";
10414 case DW_ATE_HP_floathpintel
:
10415 return "DW_ATE_HP_floathpintel";
10416 case DW_ATE_HP_imaginary_float80
:
10417 return "DW_ATE_HP_imaginary_float80";
10418 case DW_ATE_HP_imaginary_float128
:
10419 return "DW_ATE_HP_imaginary_float128";
10421 return "DW_ATE_<unknown>";
10425 /* Convert a DWARF call frame info operation to its string name. */
10429 dwarf_cfi_name (unsigned cfi_opc
)
10433 case DW_CFA_advance_loc
:
10434 return "DW_CFA_advance_loc";
10435 case DW_CFA_offset
:
10436 return "DW_CFA_offset";
10437 case DW_CFA_restore
:
10438 return "DW_CFA_restore";
10440 return "DW_CFA_nop";
10441 case DW_CFA_set_loc
:
10442 return "DW_CFA_set_loc";
10443 case DW_CFA_advance_loc1
:
10444 return "DW_CFA_advance_loc1";
10445 case DW_CFA_advance_loc2
:
10446 return "DW_CFA_advance_loc2";
10447 case DW_CFA_advance_loc4
:
10448 return "DW_CFA_advance_loc4";
10449 case DW_CFA_offset_extended
:
10450 return "DW_CFA_offset_extended";
10451 case DW_CFA_restore_extended
:
10452 return "DW_CFA_restore_extended";
10453 case DW_CFA_undefined
:
10454 return "DW_CFA_undefined";
10455 case DW_CFA_same_value
:
10456 return "DW_CFA_same_value";
10457 case DW_CFA_register
:
10458 return "DW_CFA_register";
10459 case DW_CFA_remember_state
:
10460 return "DW_CFA_remember_state";
10461 case DW_CFA_restore_state
:
10462 return "DW_CFA_restore_state";
10463 case DW_CFA_def_cfa
:
10464 return "DW_CFA_def_cfa";
10465 case DW_CFA_def_cfa_register
:
10466 return "DW_CFA_def_cfa_register";
10467 case DW_CFA_def_cfa_offset
:
10468 return "DW_CFA_def_cfa_offset";
10470 case DW_CFA_def_cfa_expression
:
10471 return "DW_CFA_def_cfa_expression";
10472 case DW_CFA_expression
:
10473 return "DW_CFA_expression";
10474 case DW_CFA_offset_extended_sf
:
10475 return "DW_CFA_offset_extended_sf";
10476 case DW_CFA_def_cfa_sf
:
10477 return "DW_CFA_def_cfa_sf";
10478 case DW_CFA_def_cfa_offset_sf
:
10479 return "DW_CFA_def_cfa_offset_sf";
10480 case DW_CFA_val_offset
:
10481 return "DW_CFA_val_offset";
10482 case DW_CFA_val_offset_sf
:
10483 return "DW_CFA_val_offset_sf";
10484 case DW_CFA_val_expression
:
10485 return "DW_CFA_val_expression";
10486 /* SGI/MIPS specific. */
10487 case DW_CFA_MIPS_advance_loc8
:
10488 return "DW_CFA_MIPS_advance_loc8";
10489 /* GNU extensions. */
10490 case DW_CFA_GNU_window_save
:
10491 return "DW_CFA_GNU_window_save";
10492 case DW_CFA_GNU_args_size
:
10493 return "DW_CFA_GNU_args_size";
10494 case DW_CFA_GNU_negative_offset_extended
:
10495 return "DW_CFA_GNU_negative_offset_extended";
10497 return "DW_CFA_<unknown>";
10503 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
10507 print_spaces (indent
, f
);
10508 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
10509 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
10511 if (die
->parent
!= NULL
)
10513 print_spaces (indent
, f
);
10514 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
10515 die
->parent
->offset
);
10518 print_spaces (indent
, f
);
10519 fprintf_unfiltered (f
, " has children: %s\n",
10520 dwarf_bool_name (die
->child
!= NULL
));
10522 print_spaces (indent
, f
);
10523 fprintf_unfiltered (f
, " attributes:\n");
10525 for (i
= 0; i
< die
->num_attrs
; ++i
)
10527 print_spaces (indent
, f
);
10528 fprintf_unfiltered (f
, " %s (%s) ",
10529 dwarf_attr_name (die
->attrs
[i
].name
),
10530 dwarf_form_name (die
->attrs
[i
].form
));
10532 switch (die
->attrs
[i
].form
)
10534 case DW_FORM_ref_addr
:
10536 fprintf_unfiltered (f
, "address: ");
10537 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
10539 case DW_FORM_block2
:
10540 case DW_FORM_block4
:
10541 case DW_FORM_block
:
10542 case DW_FORM_block1
:
10543 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
10545 case DW_FORM_exprloc
:
10546 fprintf_unfiltered (f
, "expression: size %u",
10547 DW_BLOCK (&die
->attrs
[i
])->size
);
10552 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
10553 (long) (DW_ADDR (&die
->attrs
[i
])));
10555 case DW_FORM_data1
:
10556 case DW_FORM_data2
:
10557 case DW_FORM_data4
:
10558 case DW_FORM_data8
:
10559 case DW_FORM_udata
:
10560 case DW_FORM_sdata
:
10561 fprintf_unfiltered (f
, "constant: %s",
10562 pulongest (DW_UNSND (&die
->attrs
[i
])));
10564 case DW_FORM_sec_offset
:
10565 fprintf_unfiltered (f
, "section offset: %s",
10566 pulongest (DW_UNSND (&die
->attrs
[i
])));
10569 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
10570 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
10571 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
10573 fprintf_unfiltered (f
, "signatured type, offset: unknown");
10575 case DW_FORM_string
:
10577 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
10578 DW_STRING (&die
->attrs
[i
])
10579 ? DW_STRING (&die
->attrs
[i
]) : "",
10580 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
10583 if (DW_UNSND (&die
->attrs
[i
]))
10584 fprintf_unfiltered (f
, "flag: TRUE");
10586 fprintf_unfiltered (f
, "flag: FALSE");
10588 case DW_FORM_flag_present
:
10589 fprintf_unfiltered (f
, "flag: TRUE");
10591 case DW_FORM_indirect
:
10592 /* the reader will have reduced the indirect form to
10593 the "base form" so this form should not occur */
10594 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
10597 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
10598 die
->attrs
[i
].form
);
10601 fprintf_unfiltered (f
, "\n");
10606 dump_die_for_error (struct die_info
*die
)
10608 dump_die_shallow (gdb_stderr
, 0, die
);
10612 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
10614 int indent
= level
* 4;
10616 gdb_assert (die
!= NULL
);
10618 if (level
>= max_level
)
10621 dump_die_shallow (f
, indent
, die
);
10623 if (die
->child
!= NULL
)
10625 print_spaces (indent
, f
);
10626 fprintf_unfiltered (f
, " Children:");
10627 if (level
+ 1 < max_level
)
10629 fprintf_unfiltered (f
, "\n");
10630 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
10634 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
10638 if (die
->sibling
!= NULL
&& level
> 0)
10640 dump_die_1 (f
, level
, max_level
, die
->sibling
);
10644 /* This is called from the pdie macro in gdbinit.in.
10645 It's not static so gcc will keep a copy callable from gdb. */
10648 dump_die (struct die_info
*die
, int max_level
)
10650 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
10654 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
10658 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
10664 is_ref_attr (struct attribute
*attr
)
10666 switch (attr
->form
)
10668 case DW_FORM_ref_addr
:
10673 case DW_FORM_ref_udata
:
10680 static unsigned int
10681 dwarf2_get_ref_die_offset (struct attribute
*attr
)
10683 if (is_ref_attr (attr
))
10684 return DW_ADDR (attr
);
10686 complaint (&symfile_complaints
,
10687 _("unsupported die ref attribute form: '%s'"),
10688 dwarf_form_name (attr
->form
));
10692 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
10693 * the value held by the attribute is not constant. */
10696 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
10698 if (attr
->form
== DW_FORM_sdata
)
10699 return DW_SND (attr
);
10700 else if (attr
->form
== DW_FORM_udata
10701 || attr
->form
== DW_FORM_data1
10702 || attr
->form
== DW_FORM_data2
10703 || attr
->form
== DW_FORM_data4
10704 || attr
->form
== DW_FORM_data8
)
10705 return DW_UNSND (attr
);
10708 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
10709 dwarf_form_name (attr
->form
));
10710 return default_value
;
10714 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10715 unit and add it to our queue.
10716 The result is non-zero if PER_CU was queued, otherwise the result is zero
10717 meaning either PER_CU is already queued or it is already loaded. */
10720 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
10721 struct dwarf2_per_cu_data
*per_cu
)
10723 /* Mark the dependence relation so that we don't flush PER_CU
10725 dwarf2_add_dependence (this_cu
, per_cu
);
10727 /* If it's already on the queue, we have nothing to do. */
10728 if (per_cu
->queued
)
10731 /* If the compilation unit is already loaded, just mark it as
10733 if (per_cu
->cu
!= NULL
)
10735 per_cu
->cu
->last_used
= 0;
10739 /* Add it to the queue. */
10740 queue_comp_unit (per_cu
, this_cu
->objfile
);
10745 /* Follow reference or signature attribute ATTR of SRC_DIE.
10746 On entry *REF_CU is the CU of SRC_DIE.
10747 On exit *REF_CU is the CU of the result. */
10749 static struct die_info
*
10750 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
10751 struct dwarf2_cu
**ref_cu
)
10753 struct die_info
*die
;
10755 if (is_ref_attr (attr
))
10756 die
= follow_die_ref (src_die
, attr
, ref_cu
);
10757 else if (attr
->form
== DW_FORM_sig8
)
10758 die
= follow_die_sig (src_die
, attr
, ref_cu
);
10761 dump_die_for_error (src_die
);
10762 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10763 (*ref_cu
)->objfile
->name
);
10769 /* Follow reference OFFSET.
10770 On entry *REF_CU is the CU of source DIE referencing OFFSET.
10771 On exit *REF_CU is the CU of the result. */
10773 static struct die_info
*
10774 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
10776 struct die_info temp_die
;
10777 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
10779 gdb_assert (cu
->per_cu
!= NULL
);
10781 if (cu
->per_cu
->from_debug_types
)
10783 /* .debug_types CUs cannot reference anything outside their CU.
10784 If they need to, they have to reference a signatured type via
10786 if (! offset_in_cu_p (&cu
->header
, offset
))
10790 else if (! offset_in_cu_p (&cu
->header
, offset
))
10792 struct dwarf2_per_cu_data
*per_cu
;
10794 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
10796 /* If necessary, add it to the queue and load its DIEs. */
10797 if (maybe_queue_comp_unit (cu
, per_cu
))
10798 load_full_comp_unit (per_cu
, cu
->objfile
);
10800 target_cu
= per_cu
->cu
;
10805 *ref_cu
= target_cu
;
10806 temp_die
.offset
= offset
;
10807 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
10810 /* Follow reference attribute ATTR of SRC_DIE.
10811 On entry *REF_CU is the CU of SRC_DIE.
10812 On exit *REF_CU is the CU of the result. */
10814 static struct die_info
*
10815 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
10816 struct dwarf2_cu
**ref_cu
)
10818 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
10819 struct dwarf2_cu
*cu
= *ref_cu
;
10820 struct die_info
*die
;
10822 die
= follow_die_offset (offset
, ref_cu
);
10824 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10825 "at 0x%x [in module %s]"),
10826 offset
, src_die
->offset
, cu
->objfile
->name
);
10831 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
10832 value is intended for DW_OP_call*. */
10834 struct dwarf2_locexpr_baton
10835 dwarf2_fetch_die_location_block (unsigned int offset
,
10836 struct dwarf2_per_cu_data
*per_cu
)
10838 struct dwarf2_cu
*cu
= per_cu
->cu
;
10839 struct die_info
*die
;
10840 struct attribute
*attr
;
10841 struct dwarf2_locexpr_baton retval
;
10843 die
= follow_die_offset (offset
, &cu
);
10845 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
10846 offset
, per_cu
->cu
->objfile
->name
);
10848 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10851 /* DWARF: "If there is no such attribute, then there is no effect.". */
10853 retval
.data
= NULL
;
10858 if (!attr_form_is_block (attr
))
10859 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
10860 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
10861 offset
, per_cu
->cu
->objfile
->name
);
10863 retval
.data
= DW_BLOCK (attr
)->data
;
10864 retval
.size
= DW_BLOCK (attr
)->size
;
10866 retval
.per_cu
= cu
->per_cu
;
10870 /* Follow the signature attribute ATTR in SRC_DIE.
10871 On entry *REF_CU is the CU of SRC_DIE.
10872 On exit *REF_CU is the CU of the result. */
10874 static struct die_info
*
10875 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
10876 struct dwarf2_cu
**ref_cu
)
10878 struct objfile
*objfile
= (*ref_cu
)->objfile
;
10879 struct die_info temp_die
;
10880 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
10881 struct dwarf2_cu
*sig_cu
;
10882 struct die_info
*die
;
10884 /* sig_type will be NULL if the signatured type is missing from
10886 if (sig_type
== NULL
)
10887 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10888 "at 0x%x [in module %s]"),
10889 src_die
->offset
, objfile
->name
);
10891 /* If necessary, add it to the queue and load its DIEs. */
10893 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
10894 read_signatured_type (objfile
, sig_type
);
10896 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
10898 sig_cu
= sig_type
->per_cu
.cu
;
10899 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
10900 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
10907 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10908 "at 0x%x [in module %s]"),
10909 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
10912 /* Given an offset of a signatured type, return its signatured_type. */
10914 static struct signatured_type
*
10915 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
10917 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
10918 unsigned int length
, initial_length_size
;
10919 unsigned int sig_offset
;
10920 struct signatured_type find_entry
, *type_sig
;
10922 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
10923 sig_offset
= (initial_length_size
10925 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
10926 + 1 /*address_size*/);
10927 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
10928 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
10930 /* This is only used to lookup previously recorded types.
10931 If we didn't find it, it's our bug. */
10932 gdb_assert (type_sig
!= NULL
);
10933 gdb_assert (offset
== type_sig
->offset
);
10938 /* Read in signatured type at OFFSET and build its CU and die(s). */
10941 read_signatured_type_at_offset (struct objfile
*objfile
,
10942 unsigned int offset
)
10944 struct signatured_type
*type_sig
;
10946 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
10948 /* We have the section offset, but we need the signature to do the
10949 hash table lookup. */
10950 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
10952 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10954 read_signatured_type (objfile
, type_sig
);
10956 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
10959 /* Read in a signatured type and build its CU and DIEs. */
10962 read_signatured_type (struct objfile
*objfile
,
10963 struct signatured_type
*type_sig
)
10965 gdb_byte
*types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
10966 struct die_reader_specs reader_specs
;
10967 struct dwarf2_cu
*cu
;
10968 ULONGEST signature
;
10969 struct cleanup
*back_to
, *free_cu_cleanup
;
10970 struct attribute
*attr
;
10972 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10974 cu
= xmalloc (sizeof (struct dwarf2_cu
));
10975 memset (cu
, 0, sizeof (struct dwarf2_cu
));
10976 obstack_init (&cu
->comp_unit_obstack
);
10977 cu
->objfile
= objfile
;
10978 type_sig
->per_cu
.cu
= cu
;
10979 cu
->per_cu
= &type_sig
->per_cu
;
10981 /* If an error occurs while loading, release our storage. */
10982 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
10984 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
10985 types_ptr
, objfile
->obfd
);
10986 gdb_assert (signature
== type_sig
->signature
);
10989 = htab_create_alloc_ex (cu
->header
.length
/ 12,
10993 &cu
->comp_unit_obstack
,
10994 hashtab_obstack_allocate
,
10995 dummy_obstack_deallocate
);
10997 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
10998 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
11000 init_cu_die_reader (&reader_specs
, cu
);
11002 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
11005 /* We try not to read any attributes in this function, because not
11006 all objfiles needed for references have been loaded yet, and symbol
11007 table processing isn't initialized. But we have to set the CU language,
11008 or we won't be able to build types correctly. */
11009 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
11011 set_cu_language (DW_UNSND (attr
), cu
);
11013 set_cu_language (language_minimal
, cu
);
11015 do_cleanups (back_to
);
11017 /* We've successfully allocated this compilation unit. Let our caller
11018 clean it up when finished with it. */
11019 discard_cleanups (free_cu_cleanup
);
11021 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
11022 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
11025 /* Decode simple location descriptions.
11026 Given a pointer to a dwarf block that defines a location, compute
11027 the location and return the value.
11029 NOTE drow/2003-11-18: This function is called in two situations
11030 now: for the address of static or global variables (partial symbols
11031 only) and for offsets into structures which are expected to be
11032 (more or less) constant. The partial symbol case should go away,
11033 and only the constant case should remain. That will let this
11034 function complain more accurately. A few special modes are allowed
11035 without complaint for global variables (for instance, global
11036 register values and thread-local values).
11038 A location description containing no operations indicates that the
11039 object is optimized out. The return value is 0 for that case.
11040 FIXME drow/2003-11-16: No callers check for this case any more; soon all
11041 callers will only want a very basic result and this can become a
11044 Note that stack[0] is unused except as a default error return.
11045 Note that stack overflow is not yet handled. */
11048 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
11050 struct objfile
*objfile
= cu
->objfile
;
11052 int size
= blk
->size
;
11053 gdb_byte
*data
= blk
->data
;
11054 CORE_ADDR stack
[64];
11056 unsigned int bytes_read
, unsnd
;
11100 stack
[++stacki
] = op
- DW_OP_lit0
;
11135 stack
[++stacki
] = op
- DW_OP_reg0
;
11137 dwarf2_complex_location_expr_complaint ();
11141 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
11143 stack
[++stacki
] = unsnd
;
11145 dwarf2_complex_location_expr_complaint ();
11149 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
11154 case DW_OP_const1u
:
11155 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
11159 case DW_OP_const1s
:
11160 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
11164 case DW_OP_const2u
:
11165 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
11169 case DW_OP_const2s
:
11170 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
11174 case DW_OP_const4u
:
11175 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
11179 case DW_OP_const4s
:
11180 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
11185 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
11191 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
11196 stack
[stacki
+ 1] = stack
[stacki
];
11201 stack
[stacki
- 1] += stack
[stacki
];
11205 case DW_OP_plus_uconst
:
11206 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
11211 stack
[stacki
- 1] -= stack
[stacki
];
11216 /* If we're not the last op, then we definitely can't encode
11217 this using GDB's address_class enum. This is valid for partial
11218 global symbols, although the variable's address will be bogus
11221 dwarf2_complex_location_expr_complaint ();
11224 case DW_OP_GNU_push_tls_address
:
11225 /* The top of the stack has the offset from the beginning
11226 of the thread control block at which the variable is located. */
11227 /* Nothing should follow this operator, so the top of stack would
11229 /* This is valid for partial global symbols, but the variable's
11230 address will be bogus in the psymtab. */
11232 dwarf2_complex_location_expr_complaint ();
11235 case DW_OP_GNU_uninit
:
11239 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
11240 dwarf_stack_op_name (op
, 1));
11241 return (stack
[stacki
]);
11244 return (stack
[stacki
]);
11247 /* memory allocation interface */
11249 static struct dwarf_block
*
11250 dwarf_alloc_block (struct dwarf2_cu
*cu
)
11252 struct dwarf_block
*blk
;
11254 blk
= (struct dwarf_block
*)
11255 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
11259 static struct abbrev_info
*
11260 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
11262 struct abbrev_info
*abbrev
;
11264 abbrev
= (struct abbrev_info
*)
11265 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
11266 memset (abbrev
, 0, sizeof (struct abbrev_info
));
11270 static struct die_info
*
11271 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
11273 struct die_info
*die
;
11274 size_t size
= sizeof (struct die_info
);
11277 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
11279 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
11280 memset (die
, 0, sizeof (struct die_info
));
11285 /* Macro support. */
11288 /* Return the full name of file number I in *LH's file name table.
11289 Use COMP_DIR as the name of the current directory of the
11290 compilation. The result is allocated using xmalloc; the caller is
11291 responsible for freeing it. */
11293 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
11295 /* Is the file number a valid index into the line header's file name
11296 table? Remember that file numbers start with one, not zero. */
11297 if (1 <= file
&& file
<= lh
->num_file_names
)
11299 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
11301 if (IS_ABSOLUTE_PATH (fe
->name
))
11302 return xstrdup (fe
->name
);
11310 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11316 dir_len
= strlen (dir
);
11317 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
11318 strcpy (full_name
, dir
);
11319 full_name
[dir_len
] = '/';
11320 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
11324 return xstrdup (fe
->name
);
11329 /* The compiler produced a bogus file number. We can at least
11330 record the macro definitions made in the file, even if we
11331 won't be able to find the file by name. */
11332 char fake_name
[80];
11334 sprintf (fake_name
, "<bad macro file number %d>", file
);
11336 complaint (&symfile_complaints
,
11337 _("bad file number in macro information (%d)"),
11340 return xstrdup (fake_name
);
11345 static struct macro_source_file
*
11346 macro_start_file (int file
, int line
,
11347 struct macro_source_file
*current_file
,
11348 const char *comp_dir
,
11349 struct line_header
*lh
, struct objfile
*objfile
)
11351 /* The full name of this source file. */
11352 char *full_name
= file_full_name (file
, lh
, comp_dir
);
11354 /* We don't create a macro table for this compilation unit
11355 at all until we actually get a filename. */
11356 if (! pending_macros
)
11357 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
11358 objfile
->macro_cache
);
11360 if (! current_file
)
11361 /* If we have no current file, then this must be the start_file
11362 directive for the compilation unit's main source file. */
11363 current_file
= macro_set_main (pending_macros
, full_name
);
11365 current_file
= macro_include (current_file
, line
, full_name
);
11369 return current_file
;
11373 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
11374 followed by a null byte. */
11376 copy_string (const char *buf
, int len
)
11378 char *s
= xmalloc (len
+ 1);
11380 memcpy (s
, buf
, len
);
11386 static const char *
11387 consume_improper_spaces (const char *p
, const char *body
)
11391 complaint (&symfile_complaints
,
11392 _("macro definition contains spaces in formal argument list:\n`%s'"),
11404 parse_macro_definition (struct macro_source_file
*file
, int line
,
11409 /* The body string takes one of two forms. For object-like macro
11410 definitions, it should be:
11412 <macro name> " " <definition>
11414 For function-like macro definitions, it should be:
11416 <macro name> "() " <definition>
11418 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
11420 Spaces may appear only where explicitly indicated, and in the
11423 The Dwarf 2 spec says that an object-like macro's name is always
11424 followed by a space, but versions of GCC around March 2002 omit
11425 the space when the macro's definition is the empty string.
11427 The Dwarf 2 spec says that there should be no spaces between the
11428 formal arguments in a function-like macro's formal argument list,
11429 but versions of GCC around March 2002 include spaces after the
11433 /* Find the extent of the macro name. The macro name is terminated
11434 by either a space or null character (for an object-like macro) or
11435 an opening paren (for a function-like macro). */
11436 for (p
= body
; *p
; p
++)
11437 if (*p
== ' ' || *p
== '(')
11440 if (*p
== ' ' || *p
== '\0')
11442 /* It's an object-like macro. */
11443 int name_len
= p
- body
;
11444 char *name
= copy_string (body
, name_len
);
11445 const char *replacement
;
11448 replacement
= body
+ name_len
+ 1;
11451 dwarf2_macro_malformed_definition_complaint (body
);
11452 replacement
= body
+ name_len
;
11455 macro_define_object (file
, line
, name
, replacement
);
11459 else if (*p
== '(')
11461 /* It's a function-like macro. */
11462 char *name
= copy_string (body
, p
- body
);
11465 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
11469 p
= consume_improper_spaces (p
, body
);
11471 /* Parse the formal argument list. */
11472 while (*p
&& *p
!= ')')
11474 /* Find the extent of the current argument name. */
11475 const char *arg_start
= p
;
11477 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
11480 if (! *p
|| p
== arg_start
)
11481 dwarf2_macro_malformed_definition_complaint (body
);
11484 /* Make sure argv has room for the new argument. */
11485 if (argc
>= argv_size
)
11488 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
11491 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
11494 p
= consume_improper_spaces (p
, body
);
11496 /* Consume the comma, if present. */
11501 p
= consume_improper_spaces (p
, body
);
11510 /* Perfectly formed definition, no complaints. */
11511 macro_define_function (file
, line
, name
,
11512 argc
, (const char **) argv
,
11514 else if (*p
== '\0')
11516 /* Complain, but do define it. */
11517 dwarf2_macro_malformed_definition_complaint (body
);
11518 macro_define_function (file
, line
, name
,
11519 argc
, (const char **) argv
,
11523 /* Just complain. */
11524 dwarf2_macro_malformed_definition_complaint (body
);
11527 /* Just complain. */
11528 dwarf2_macro_malformed_definition_complaint (body
);
11534 for (i
= 0; i
< argc
; i
++)
11540 dwarf2_macro_malformed_definition_complaint (body
);
11545 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
11546 char *comp_dir
, bfd
*abfd
,
11547 struct dwarf2_cu
*cu
)
11549 gdb_byte
*mac_ptr
, *mac_end
;
11550 struct macro_source_file
*current_file
= 0;
11551 enum dwarf_macinfo_record_type macinfo_type
;
11552 int at_commandline
;
11554 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
11555 &dwarf2_per_objfile
->macinfo
);
11556 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
11558 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
11562 /* First pass: Find the name of the base filename.
11563 This filename is needed in order to process all macros whose definition
11564 (or undefinition) comes from the command line. These macros are defined
11565 before the first DW_MACINFO_start_file entry, and yet still need to be
11566 associated to the base file.
11568 To determine the base file name, we scan the macro definitions until we
11569 reach the first DW_MACINFO_start_file entry. We then initialize
11570 CURRENT_FILE accordingly so that any macro definition found before the
11571 first DW_MACINFO_start_file can still be associated to the base file. */
11573 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11574 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
11575 + dwarf2_per_objfile
->macinfo
.size
;
11579 /* Do we at least have room for a macinfo type byte? */
11580 if (mac_ptr
>= mac_end
)
11582 /* Complaint is printed during the second pass as GDB will probably
11583 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11587 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11590 switch (macinfo_type
)
11592 /* A zero macinfo type indicates the end of the macro
11597 case DW_MACINFO_define
:
11598 case DW_MACINFO_undef
:
11599 /* Only skip the data by MAC_PTR. */
11601 unsigned int bytes_read
;
11603 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11604 mac_ptr
+= bytes_read
;
11605 read_string (abfd
, mac_ptr
, &bytes_read
);
11606 mac_ptr
+= bytes_read
;
11610 case DW_MACINFO_start_file
:
11612 unsigned int bytes_read
;
11615 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11616 mac_ptr
+= bytes_read
;
11617 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11618 mac_ptr
+= bytes_read
;
11620 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
11625 case DW_MACINFO_end_file
:
11626 /* No data to skip by MAC_PTR. */
11629 case DW_MACINFO_vendor_ext
:
11630 /* Only skip the data by MAC_PTR. */
11632 unsigned int bytes_read
;
11634 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11635 mac_ptr
+= bytes_read
;
11636 read_string (abfd
, mac_ptr
, &bytes_read
);
11637 mac_ptr
+= bytes_read
;
11644 } while (macinfo_type
!= 0 && current_file
== NULL
);
11646 /* Second pass: Process all entries.
11648 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11649 command-line macro definitions/undefinitions. This flag is unset when we
11650 reach the first DW_MACINFO_start_file entry. */
11652 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11654 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11655 GDB is still reading the definitions from command line. First
11656 DW_MACINFO_start_file will need to be ignored as it was already executed
11657 to create CURRENT_FILE for the main source holding also the command line
11658 definitions. On first met DW_MACINFO_start_file this flag is reset to
11659 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11661 at_commandline
= 1;
11665 /* Do we at least have room for a macinfo type byte? */
11666 if (mac_ptr
>= mac_end
)
11668 dwarf2_macros_too_long_complaint ();
11672 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11675 switch (macinfo_type
)
11677 /* A zero macinfo type indicates the end of the macro
11682 case DW_MACINFO_define
:
11683 case DW_MACINFO_undef
:
11685 unsigned int bytes_read
;
11689 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11690 mac_ptr
+= bytes_read
;
11691 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
11692 mac_ptr
+= bytes_read
;
11694 if (! current_file
)
11696 /* DWARF violation as no main source is present. */
11697 complaint (&symfile_complaints
,
11698 _("debug info with no main source gives macro %s "
11700 macinfo_type
== DW_MACINFO_define
?
11702 macinfo_type
== DW_MACINFO_undef
?
11703 _("undefinition") :
11704 _("something-or-other"), line
, body
);
11707 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11708 complaint (&symfile_complaints
,
11709 _("debug info gives %s macro %s with %s line %d: %s"),
11710 at_commandline
? _("command-line") : _("in-file"),
11711 macinfo_type
== DW_MACINFO_define
?
11713 macinfo_type
== DW_MACINFO_undef
?
11714 _("undefinition") :
11715 _("something-or-other"),
11716 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
11718 if (macinfo_type
== DW_MACINFO_define
)
11719 parse_macro_definition (current_file
, line
, body
);
11720 else if (macinfo_type
== DW_MACINFO_undef
)
11721 macro_undef (current_file
, line
, body
);
11725 case DW_MACINFO_start_file
:
11727 unsigned int bytes_read
;
11730 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11731 mac_ptr
+= bytes_read
;
11732 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11733 mac_ptr
+= bytes_read
;
11735 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11736 complaint (&symfile_complaints
,
11737 _("debug info gives source %d included "
11738 "from %s at %s line %d"),
11739 file
, at_commandline
? _("command-line") : _("file"),
11740 line
== 0 ? _("zero") : _("non-zero"), line
);
11742 if (at_commandline
)
11744 /* This DW_MACINFO_start_file was executed in the pass one. */
11745 at_commandline
= 0;
11748 current_file
= macro_start_file (file
, line
,
11749 current_file
, comp_dir
,
11754 case DW_MACINFO_end_file
:
11755 if (! current_file
)
11756 complaint (&symfile_complaints
,
11757 _("macro debug info has an unmatched `close_file' directive"));
11760 current_file
= current_file
->included_by
;
11761 if (! current_file
)
11763 enum dwarf_macinfo_record_type next_type
;
11765 /* GCC circa March 2002 doesn't produce the zero
11766 type byte marking the end of the compilation
11767 unit. Complain if it's not there, but exit no
11770 /* Do we at least have room for a macinfo type byte? */
11771 if (mac_ptr
>= mac_end
)
11773 dwarf2_macros_too_long_complaint ();
11777 /* We don't increment mac_ptr here, so this is just
11779 next_type
= read_1_byte (abfd
, mac_ptr
);
11780 if (next_type
!= 0)
11781 complaint (&symfile_complaints
,
11782 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11789 case DW_MACINFO_vendor_ext
:
11791 unsigned int bytes_read
;
11795 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11796 mac_ptr
+= bytes_read
;
11797 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
11798 mac_ptr
+= bytes_read
;
11800 /* We don't recognize any vendor extensions. */
11804 } while (macinfo_type
!= 0);
11807 /* Check if the attribute's form is a DW_FORM_block*
11808 if so return true else false. */
11810 attr_form_is_block (struct attribute
*attr
)
11812 return (attr
== NULL
? 0 :
11813 attr
->form
== DW_FORM_block1
11814 || attr
->form
== DW_FORM_block2
11815 || attr
->form
== DW_FORM_block4
11816 || attr
->form
== DW_FORM_block
11817 || attr
->form
== DW_FORM_exprloc
);
11820 /* Return non-zero if ATTR's value is a section offset --- classes
11821 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11822 You may use DW_UNSND (attr) to retrieve such offsets.
11824 Section 7.5.4, "Attribute Encodings", explains that no attribute
11825 may have a value that belongs to more than one of these classes; it
11826 would be ambiguous if we did, because we use the same forms for all
11829 attr_form_is_section_offset (struct attribute
*attr
)
11831 return (attr
->form
== DW_FORM_data4
11832 || attr
->form
== DW_FORM_data8
11833 || attr
->form
== DW_FORM_sec_offset
);
11837 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11838 zero otherwise. When this function returns true, you can apply
11839 dwarf2_get_attr_constant_value to it.
11841 However, note that for some attributes you must check
11842 attr_form_is_section_offset before using this test. DW_FORM_data4
11843 and DW_FORM_data8 are members of both the constant class, and of
11844 the classes that contain offsets into other debug sections
11845 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11846 that, if an attribute's can be either a constant or one of the
11847 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11848 taken as section offsets, not constants. */
11850 attr_form_is_constant (struct attribute
*attr
)
11852 switch (attr
->form
)
11854 case DW_FORM_sdata
:
11855 case DW_FORM_udata
:
11856 case DW_FORM_data1
:
11857 case DW_FORM_data2
:
11858 case DW_FORM_data4
:
11859 case DW_FORM_data8
:
11867 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
11868 struct dwarf2_cu
*cu
)
11870 if (attr_form_is_section_offset (attr
)
11871 /* ".debug_loc" may not exist at all, or the offset may be outside
11872 the section. If so, fall through to the complaint in the
11874 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
11876 struct dwarf2_loclist_baton
*baton
;
11878 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11879 sizeof (struct dwarf2_loclist_baton
));
11880 baton
->per_cu
= cu
->per_cu
;
11881 gdb_assert (baton
->per_cu
);
11883 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
11884 &dwarf2_per_objfile
->loc
);
11886 /* We don't know how long the location list is, but make sure we
11887 don't run off the edge of the section. */
11888 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
11889 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
11890 baton
->base_address
= cu
->base_address
;
11891 if (cu
->base_known
== 0)
11892 complaint (&symfile_complaints
,
11893 _("Location list used without specifying the CU base address."));
11895 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
11896 SYMBOL_LOCATION_BATON (sym
) = baton
;
11900 struct dwarf2_locexpr_baton
*baton
;
11902 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11903 sizeof (struct dwarf2_locexpr_baton
));
11904 baton
->per_cu
= cu
->per_cu
;
11905 gdb_assert (baton
->per_cu
);
11907 if (attr_form_is_block (attr
))
11909 /* Note that we're just copying the block's data pointer
11910 here, not the actual data. We're still pointing into the
11911 info_buffer for SYM's objfile; right now we never release
11912 that buffer, but when we do clean up properly this may
11914 baton
->size
= DW_BLOCK (attr
)->size
;
11915 baton
->data
= DW_BLOCK (attr
)->data
;
11919 dwarf2_invalid_attrib_class_complaint ("location description",
11920 SYMBOL_NATURAL_NAME (sym
));
11922 baton
->data
= NULL
;
11925 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11926 SYMBOL_LOCATION_BATON (sym
) = baton
;
11930 /* Return the OBJFILE associated with the compilation unit CU. */
11933 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
11935 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11937 /* Return the master objfile, so that we can report and look up the
11938 correct file containing this variable. */
11939 if (objfile
->separate_debug_objfile_backlink
)
11940 objfile
= objfile
->separate_debug_objfile_backlink
;
11945 /* Return the address size given in the compilation unit header for CU. */
11948 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
11951 return per_cu
->cu
->header
.addr_size
;
11954 /* If the CU is not currently read in, we re-read its header. */
11955 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11956 struct dwarf2_per_objfile
*per_objfile
11957 = objfile_data (objfile
, dwarf2_objfile_data_key
);
11958 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
11959 struct comp_unit_head cu_header
;
11961 memset (&cu_header
, 0, sizeof cu_header
);
11962 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
11963 return cu_header
.addr_size
;
11967 /* Return the offset size given in the compilation unit header for CU. */
11970 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
11973 return per_cu
->cu
->header
.offset_size
;
11976 /* If the CU is not currently read in, we re-read its header. */
11977 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11978 struct dwarf2_per_objfile
*per_objfile
11979 = objfile_data (objfile
, dwarf2_objfile_data_key
);
11980 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
11981 struct comp_unit_head cu_header
;
11983 memset (&cu_header
, 0, sizeof cu_header
);
11984 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
11985 return cu_header
.offset_size
;
11989 /* Locate the .debug_info compilation unit from CU's objfile which contains
11990 the DIE at OFFSET. Raises an error on failure. */
11992 static struct dwarf2_per_cu_data
*
11993 dwarf2_find_containing_comp_unit (unsigned int offset
,
11994 struct objfile
*objfile
)
11996 struct dwarf2_per_cu_data
*this_cu
;
12000 high
= dwarf2_per_objfile
->n_comp_units
- 1;
12003 int mid
= low
+ (high
- low
) / 2;
12005 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
12010 gdb_assert (low
== high
);
12011 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
12014 error (_("Dwarf Error: could not find partial DIE containing "
12015 "offset 0x%lx [in module %s]"),
12016 (long) offset
, bfd_get_filename (objfile
->obfd
));
12018 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
12019 return dwarf2_per_objfile
->all_comp_units
[low
-1];
12023 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
12024 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
12025 && offset
>= this_cu
->offset
+ this_cu
->length
)
12026 error (_("invalid dwarf2 offset %u"), offset
);
12027 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
12032 /* Locate the compilation unit from OBJFILE which is located at exactly
12033 OFFSET. Raises an error on failure. */
12035 static struct dwarf2_per_cu_data
*
12036 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
12038 struct dwarf2_per_cu_data
*this_cu
;
12040 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
12041 if (this_cu
->offset
!= offset
)
12042 error (_("no compilation unit with offset %u."), offset
);
12046 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
12048 static struct dwarf2_cu
*
12049 alloc_one_comp_unit (struct objfile
*objfile
)
12051 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
12052 cu
->objfile
= objfile
;
12053 obstack_init (&cu
->comp_unit_obstack
);
12057 /* Release one cached compilation unit, CU. We unlink it from the tree
12058 of compilation units, but we don't remove it from the read_in_chain;
12059 the caller is responsible for that.
12060 NOTE: DATA is a void * because this function is also used as a
12061 cleanup routine. */
12064 free_one_comp_unit (void *data
)
12066 struct dwarf2_cu
*cu
= data
;
12068 if (cu
->per_cu
!= NULL
)
12069 cu
->per_cu
->cu
= NULL
;
12072 obstack_free (&cu
->comp_unit_obstack
, NULL
);
12077 /* This cleanup function is passed the address of a dwarf2_cu on the stack
12078 when we're finished with it. We can't free the pointer itself, but be
12079 sure to unlink it from the cache. Also release any associated storage
12080 and perform cache maintenance.
12082 Only used during partial symbol parsing. */
12085 free_stack_comp_unit (void *data
)
12087 struct dwarf2_cu
*cu
= data
;
12089 obstack_free (&cu
->comp_unit_obstack
, NULL
);
12090 cu
->partial_dies
= NULL
;
12092 if (cu
->per_cu
!= NULL
)
12094 /* This compilation unit is on the stack in our caller, so we
12095 should not xfree it. Just unlink it. */
12096 cu
->per_cu
->cu
= NULL
;
12099 /* If we had a per-cu pointer, then we may have other compilation
12100 units loaded, so age them now. */
12101 age_cached_comp_units ();
12105 /* Free all cached compilation units. */
12108 free_cached_comp_units (void *data
)
12110 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
12112 per_cu
= dwarf2_per_objfile
->read_in_chain
;
12113 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
12114 while (per_cu
!= NULL
)
12116 struct dwarf2_per_cu_data
*next_cu
;
12118 next_cu
= per_cu
->cu
->read_in_chain
;
12120 free_one_comp_unit (per_cu
->cu
);
12121 *last_chain
= next_cu
;
12127 /* Increase the age counter on each cached compilation unit, and free
12128 any that are too old. */
12131 age_cached_comp_units (void)
12133 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
12135 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
12136 per_cu
= dwarf2_per_objfile
->read_in_chain
;
12137 while (per_cu
!= NULL
)
12139 per_cu
->cu
->last_used
++;
12140 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
12141 dwarf2_mark (per_cu
->cu
);
12142 per_cu
= per_cu
->cu
->read_in_chain
;
12145 per_cu
= dwarf2_per_objfile
->read_in_chain
;
12146 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
12147 while (per_cu
!= NULL
)
12149 struct dwarf2_per_cu_data
*next_cu
;
12151 next_cu
= per_cu
->cu
->read_in_chain
;
12153 if (!per_cu
->cu
->mark
)
12155 free_one_comp_unit (per_cu
->cu
);
12156 *last_chain
= next_cu
;
12159 last_chain
= &per_cu
->cu
->read_in_chain
;
12165 /* Remove a single compilation unit from the cache. */
12168 free_one_cached_comp_unit (void *target_cu
)
12170 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
12172 per_cu
= dwarf2_per_objfile
->read_in_chain
;
12173 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
12174 while (per_cu
!= NULL
)
12176 struct dwarf2_per_cu_data
*next_cu
;
12178 next_cu
= per_cu
->cu
->read_in_chain
;
12180 if (per_cu
->cu
== target_cu
)
12182 free_one_comp_unit (per_cu
->cu
);
12183 *last_chain
= next_cu
;
12187 last_chain
= &per_cu
->cu
->read_in_chain
;
12193 /* Release all extra memory associated with OBJFILE. */
12196 dwarf2_free_objfile (struct objfile
*objfile
)
12198 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
12200 if (dwarf2_per_objfile
== NULL
)
12203 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
12204 free_cached_comp_units (NULL
);
12206 /* Everything else should be on the objfile obstack. */
12209 /* A pair of DIE offset and GDB type pointer. We store these
12210 in a hash table separate from the DIEs, and preserve them
12211 when the DIEs are flushed out of cache. */
12213 struct dwarf2_offset_and_type
12215 unsigned int offset
;
12219 /* Hash function for a dwarf2_offset_and_type. */
12222 offset_and_type_hash (const void *item
)
12224 const struct dwarf2_offset_and_type
*ofs
= item
;
12226 return ofs
->offset
;
12229 /* Equality function for a dwarf2_offset_and_type. */
12232 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
12234 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
12235 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
12237 return ofs_lhs
->offset
== ofs_rhs
->offset
;
12240 /* Set the type associated with DIE to TYPE. Save it in CU's hash
12241 table if necessary. For convenience, return TYPE.
12243 The DIEs reading must have careful ordering to:
12244 * Not cause infite loops trying to read in DIEs as a prerequisite for
12245 reading current DIE.
12246 * Not trying to dereference contents of still incompletely read in types
12247 while reading in other DIEs.
12248 * Enable referencing still incompletely read in types just by a pointer to
12249 the type without accessing its fields.
12251 Therefore caller should follow these rules:
12252 * Try to fetch any prerequisite types we may need to build this DIE type
12253 before building the type and calling set_die_type.
12254 * After building typer call set_die_type for current DIE as soon as
12255 possible before fetching more types to complete the current type.
12256 * Make the type as complete as possible before fetching more types. */
12258 static struct type
*
12259 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
12261 struct dwarf2_offset_and_type
**slot
, ofs
;
12263 /* For Ada types, make sure that the gnat-specific data is always
12264 initialized (if not already set). There are a few types where
12265 we should not be doing so, because the type-specific area is
12266 already used to hold some other piece of info (eg: TYPE_CODE_FLT
12267 where the type-specific area is used to store the floatformat).
12268 But this is not a problem, because the gnat-specific information
12269 is actually not needed for these types. */
12270 if (need_gnat_info (cu
)
12271 && TYPE_CODE (type
) != TYPE_CODE_FUNC
12272 && TYPE_CODE (type
) != TYPE_CODE_FLT
12273 && !HAVE_GNAT_AUX_INFO (type
))
12274 INIT_GNAT_SPECIFIC (type
);
12276 if (cu
->type_hash
== NULL
)
12278 gdb_assert (cu
->per_cu
!= NULL
);
12279 cu
->per_cu
->type_hash
12280 = htab_create_alloc_ex (cu
->header
.length
/ 24,
12281 offset_and_type_hash
,
12282 offset_and_type_eq
,
12284 &cu
->objfile
->objfile_obstack
,
12285 hashtab_obstack_allocate
,
12286 dummy_obstack_deallocate
);
12287 cu
->type_hash
= cu
->per_cu
->type_hash
;
12290 ofs
.offset
= die
->offset
;
12292 slot
= (struct dwarf2_offset_and_type
**)
12293 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
12295 complaint (&symfile_complaints
,
12296 _("A problem internal to GDB: DIE 0x%x has type already set"),
12298 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
12303 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
12304 not have a saved type. */
12306 static struct type
*
12307 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12309 struct dwarf2_offset_and_type
*slot
, ofs
;
12310 htab_t type_hash
= cu
->type_hash
;
12312 if (type_hash
== NULL
)
12315 ofs
.offset
= die
->offset
;
12316 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
12323 /* Add a dependence relationship from CU to REF_PER_CU. */
12326 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
12327 struct dwarf2_per_cu_data
*ref_per_cu
)
12331 if (cu
->dependencies
== NULL
)
12333 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
12334 NULL
, &cu
->comp_unit_obstack
,
12335 hashtab_obstack_allocate
,
12336 dummy_obstack_deallocate
);
12338 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
12340 *slot
= ref_per_cu
;
12343 /* Subroutine of dwarf2_mark to pass to htab_traverse.
12344 Set the mark field in every compilation unit in the
12345 cache that we must keep because we are keeping CU. */
12348 dwarf2_mark_helper (void **slot
, void *data
)
12350 struct dwarf2_per_cu_data
*per_cu
;
12352 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
12353 if (per_cu
->cu
->mark
)
12355 per_cu
->cu
->mark
= 1;
12357 if (per_cu
->cu
->dependencies
!= NULL
)
12358 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
12363 /* Set the mark field in CU and in every other compilation unit in the
12364 cache that we must keep because we are keeping CU. */
12367 dwarf2_mark (struct dwarf2_cu
*cu
)
12372 if (cu
->dependencies
!= NULL
)
12373 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
12377 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
12381 per_cu
->cu
->mark
= 0;
12382 per_cu
= per_cu
->cu
->read_in_chain
;
12386 /* Trivial hash function for partial_die_info: the hash value of a DIE
12387 is its offset in .debug_info for this objfile. */
12390 partial_die_hash (const void *item
)
12392 const struct partial_die_info
*part_die
= item
;
12394 return part_die
->offset
;
12397 /* Trivial comparison function for partial_die_info structures: two DIEs
12398 are equal if they have the same offset. */
12401 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
12403 const struct partial_die_info
*part_die_lhs
= item_lhs
;
12404 const struct partial_die_info
*part_die_rhs
= item_rhs
;
12406 return part_die_lhs
->offset
== part_die_rhs
->offset
;
12409 static struct cmd_list_element
*set_dwarf2_cmdlist
;
12410 static struct cmd_list_element
*show_dwarf2_cmdlist
;
12413 set_dwarf2_cmd (char *args
, int from_tty
)
12415 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
12419 show_dwarf2_cmd (char *args
, int from_tty
)
12421 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
12424 /* If section described by INFO was mmapped, munmap it now. */
12427 munmap_section_buffer (struct dwarf2_section_info
*info
)
12429 if (info
->was_mmapped
)
12432 intptr_t begin
= (intptr_t) info
->buffer
;
12433 intptr_t map_begin
= begin
& ~(pagesize
- 1);
12434 size_t map_length
= info
->size
+ begin
- map_begin
;
12436 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
12438 /* Without HAVE_MMAP, we should never be here to begin with. */
12444 /* munmap debug sections for OBJFILE, if necessary. */
12447 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
12449 struct dwarf2_per_objfile
*data
= d
;
12451 munmap_section_buffer (&data
->info
);
12452 munmap_section_buffer (&data
->abbrev
);
12453 munmap_section_buffer (&data
->line
);
12454 munmap_section_buffer (&data
->str
);
12455 munmap_section_buffer (&data
->macinfo
);
12456 munmap_section_buffer (&data
->ranges
);
12457 munmap_section_buffer (&data
->loc
);
12458 munmap_section_buffer (&data
->frame
);
12459 munmap_section_buffer (&data
->eh_frame
);
12462 int dwarf2_always_disassemble
;
12465 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
12466 struct cmd_list_element
*c
, const char *value
)
12468 fprintf_filtered (file
, _("\
12469 Whether to always disassemble DWARF expressions is %s.\n"),
12473 void _initialize_dwarf2_read (void);
12476 _initialize_dwarf2_read (void)
12478 dwarf2_objfile_data_key
12479 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
12481 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
12482 Set DWARF 2 specific variables.\n\
12483 Configure DWARF 2 variables such as the cache size"),
12484 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
12485 0/*allow-unknown*/, &maintenance_set_cmdlist
);
12487 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
12488 Show DWARF 2 specific variables\n\
12489 Show DWARF 2 variables such as the cache size"),
12490 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
12491 0/*allow-unknown*/, &maintenance_show_cmdlist
);
12493 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
12494 &dwarf2_max_cache_age
, _("\
12495 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
12496 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
12497 A higher limit means that cached compilation units will be stored\n\
12498 in memory longer, and more total memory will be used. Zero disables\n\
12499 caching, which can slow down startup."),
12501 show_dwarf2_max_cache_age
,
12502 &set_dwarf2_cmdlist
,
12503 &show_dwarf2_cmdlist
);
12505 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
12506 &dwarf2_always_disassemble
, _("\
12507 Set whether `info address' always disassembles DWARF expressions."), _("\
12508 Show whether `info address' always disassembles DWARF expressions."), _("\
12509 When enabled, DWARF expressions are always printed in an assembly-like\n\
12510 syntax. When disabled, expressions will be printed in a more\n\
12511 conversational style, when possible."),
12513 show_dwarf2_always_disassemble
,
12514 &set_dwarf2_cmdlist
,
12515 &show_dwarf2_cmdlist
);
12517 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
12518 Set debugging of the dwarf2 DIE reader."), _("\
12519 Show debugging of the dwarf2 DIE reader."), _("\
12520 When enabled (non-zero), DIEs are dumped after they are read in.\n\
12521 The value is the maximum depth to print."),
12524 &setdebuglist
, &showdebuglist
);