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 iff currently read in. */
341 struct dwarf2_cu
*cu
;
343 /* If full symbols for this CU have been read in, then this field
344 holds a map of DIE offsets to types. It isn't always possible
345 to reconstruct this information later, so we have to preserve
349 /* The partial symbol table associated with this compilation unit,
350 or NULL for partial units (which do not have an associated
352 struct partial_symtab
*psymtab
;
355 /* Entry in the signatured_types hash table. */
357 struct signatured_type
361 /* Offset in .debug_types of the TU (type_unit) for this type. */
364 /* Offset in .debug_types of the type defined by this TU. */
365 unsigned int type_offset
;
367 /* The CU(/TU) of this type. */
368 struct dwarf2_per_cu_data per_cu
;
371 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
372 which are used for both .debug_info and .debug_types dies.
373 All parameters here are unchanging for the life of the call.
374 This struct exists to abstract away the constant parameters of
377 struct die_reader_specs
379 /* The bfd of this objfile. */
382 /* The CU of the DIE we are parsing. */
383 struct dwarf2_cu
*cu
;
385 /* Pointer to start of section buffer.
386 This is either the start of .debug_info or .debug_types. */
387 const gdb_byte
*buffer
;
390 /* The line number information for a compilation unit (found in the
391 .debug_line section) begins with a "statement program header",
392 which contains the following information. */
395 unsigned int total_length
;
396 unsigned short version
;
397 unsigned int header_length
;
398 unsigned char minimum_instruction_length
;
399 unsigned char default_is_stmt
;
401 unsigned char line_range
;
402 unsigned char opcode_base
;
404 /* standard_opcode_lengths[i] is the number of operands for the
405 standard opcode whose value is i. This means that
406 standard_opcode_lengths[0] is unused, and the last meaningful
407 element is standard_opcode_lengths[opcode_base - 1]. */
408 unsigned char *standard_opcode_lengths
;
410 /* The include_directories table. NOTE! These strings are not
411 allocated with xmalloc; instead, they are pointers into
412 debug_line_buffer. If you try to free them, `free' will get
414 unsigned int num_include_dirs
, include_dirs_size
;
417 /* The file_names table. NOTE! These strings are not allocated
418 with xmalloc; instead, they are pointers into debug_line_buffer.
419 Don't try to free them directly. */
420 unsigned int num_file_names
, file_names_size
;
424 unsigned int dir_index
;
425 unsigned int mod_time
;
427 int included_p
; /* Non-zero if referenced by the Line Number Program. */
428 struct symtab
*symtab
; /* The associated symbol table, if any. */
431 /* The start and end of the statement program following this
432 header. These point into dwarf2_per_objfile->line_buffer. */
433 gdb_byte
*statement_program_start
, *statement_program_end
;
436 /* When we construct a partial symbol table entry we only
437 need this much information. */
438 struct partial_die_info
440 /* Offset of this DIE. */
443 /* DWARF-2 tag for this DIE. */
444 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
446 /* Assorted flags describing the data found in this DIE. */
447 unsigned int has_children
: 1;
448 unsigned int is_external
: 1;
449 unsigned int is_declaration
: 1;
450 unsigned int has_type
: 1;
451 unsigned int has_specification
: 1;
452 unsigned int has_pc_info
: 1;
454 /* Flag set if the SCOPE field of this structure has been
456 unsigned int scope_set
: 1;
458 /* Flag set if the DIE has a byte_size attribute. */
459 unsigned int has_byte_size
: 1;
461 /* The name of this DIE. Normally the value of DW_AT_name, but
462 sometimes a default name for unnamed DIEs. */
465 /* The scope to prepend to our children. This is generally
466 allocated on the comp_unit_obstack, so will disappear
467 when this compilation unit leaves the cache. */
470 /* The location description associated with this DIE, if any. */
471 struct dwarf_block
*locdesc
;
473 /* If HAS_PC_INFO, the PC range associated with this DIE. */
477 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
478 DW_AT_sibling, if any. */
481 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
482 DW_AT_specification (or DW_AT_abstract_origin or
484 unsigned int spec_offset
;
486 /* Pointers to this DIE's parent, first child, and next sibling,
488 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
491 /* This data structure holds the information of an abbrev. */
494 unsigned int number
; /* number identifying abbrev */
495 enum dwarf_tag tag
; /* dwarf tag */
496 unsigned short has_children
; /* boolean */
497 unsigned short num_attrs
; /* number of attributes */
498 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
499 struct abbrev_info
*next
; /* next in chain */
504 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
505 ENUM_BITFIELD(dwarf_form
) form
: 16;
508 /* Attributes have a name and a value */
511 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
512 ENUM_BITFIELD(dwarf_form
) form
: 15;
514 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
515 field should be in u.str (existing only for DW_STRING) but it is kept
516 here for better struct attribute alignment. */
517 unsigned int string_is_canonical
: 1;
522 struct dwarf_block
*blk
;
526 struct signatured_type
*signatured_type
;
531 /* This data structure holds a complete die structure. */
534 /* DWARF-2 tag for this DIE. */
535 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
537 /* Number of attributes */
538 unsigned short num_attrs
;
543 /* Offset in .debug_info or .debug_types section. */
546 /* The dies in a compilation unit form an n-ary tree. PARENT
547 points to this die's parent; CHILD points to the first child of
548 this node; and all the children of a given node are chained
549 together via their SIBLING fields, terminated by a die whose
551 struct die_info
*child
; /* Its first child, if any. */
552 struct die_info
*sibling
; /* Its next sibling, if any. */
553 struct die_info
*parent
; /* Its parent, if any. */
555 /* An array of attributes, with NUM_ATTRS elements. There may be
556 zero, but it's not common and zero-sized arrays are not
557 sufficiently portable C. */
558 struct attribute attrs
[1];
561 struct function_range
564 CORE_ADDR lowpc
, highpc
;
566 struct function_range
*next
;
569 /* Get at parts of an attribute structure */
571 #define DW_STRING(attr) ((attr)->u.str)
572 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
573 #define DW_UNSND(attr) ((attr)->u.unsnd)
574 #define DW_BLOCK(attr) ((attr)->u.blk)
575 #define DW_SND(attr) ((attr)->u.snd)
576 #define DW_ADDR(attr) ((attr)->u.addr)
577 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
579 /* Blocks are a bunch of untyped bytes. */
586 #ifndef ATTR_ALLOC_CHUNK
587 #define ATTR_ALLOC_CHUNK 4
590 /* Allocate fields for structs, unions and enums in this size. */
591 #ifndef DW_FIELD_ALLOC_CHUNK
592 #define DW_FIELD_ALLOC_CHUNK 4
595 /* A zeroed version of a partial die for initialization purposes. */
596 static struct partial_die_info zeroed_partial_die
;
598 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
599 but this would require a corresponding change in unpack_field_as_long
601 static int bits_per_byte
= 8;
603 /* The routines that read and process dies for a C struct or C++ class
604 pass lists of data member fields and lists of member function fields
605 in an instance of a field_info structure, as defined below. */
608 /* List of data member and baseclasses fields. */
611 struct nextfield
*next
;
616 *fields
, *baseclasses
;
618 /* Number of fields (including baseclasses). */
621 /* Number of baseclasses. */
624 /* Set if the accesibility of one of the fields is not public. */
625 int non_public_fields
;
627 /* Member function fields array, entries are allocated in the order they
628 are encountered in the object file. */
631 struct nextfnfield
*next
;
632 struct fn_field fnfield
;
636 /* Member function fieldlist array, contains name of possibly overloaded
637 member function, number of overloaded member functions and a pointer
638 to the head of the member function field chain. */
643 struct nextfnfield
*head
;
647 /* Number of entries in the fnfieldlists array. */
651 /* One item on the queue of compilation units to read in full symbols
653 struct dwarf2_queue_item
655 struct dwarf2_per_cu_data
*per_cu
;
656 struct dwarf2_queue_item
*next
;
659 /* The current queue. */
660 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
662 /* Loaded secondary compilation units are kept in memory until they
663 have not been referenced for the processing of this many
664 compilation units. Set this to zero to disable caching. Cache
665 sizes of up to at least twenty will improve startup time for
666 typical inter-CU-reference binaries, at an obvious memory cost. */
667 static int dwarf2_max_cache_age
= 5;
669 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
670 struct cmd_list_element
*c
, const char *value
)
672 fprintf_filtered (file
, _("\
673 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
678 /* Various complaints about symbol reading that don't abort the process */
681 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
683 complaint (&symfile_complaints
,
684 _("statement list doesn't fit in .debug_line section"));
688 dwarf2_debug_line_missing_file_complaint (void)
690 complaint (&symfile_complaints
,
691 _(".debug_line section has line data without a file"));
695 dwarf2_debug_line_missing_end_sequence_complaint (void)
697 complaint (&symfile_complaints
,
698 _(".debug_line section has line program sequence without an end"));
702 dwarf2_complex_location_expr_complaint (void)
704 complaint (&symfile_complaints
, _("location expression too complex"));
708 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
711 complaint (&symfile_complaints
,
712 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
717 dwarf2_macros_too_long_complaint (void)
719 complaint (&symfile_complaints
,
720 _("macro info runs off end of `.debug_macinfo' section"));
724 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
726 complaint (&symfile_complaints
,
727 _("macro debug info contains a malformed macro definition:\n`%s'"),
732 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
734 complaint (&symfile_complaints
,
735 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
738 /* local function prototypes */
740 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
742 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
745 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
747 struct partial_symtab
*);
749 static void dwarf2_build_psymtabs_hard (struct objfile
*);
751 static void scan_partial_symbols (struct partial_die_info
*,
752 CORE_ADDR
*, CORE_ADDR
*,
753 int, struct dwarf2_cu
*);
755 static void add_partial_symbol (struct partial_die_info
*,
758 static void add_partial_namespace (struct partial_die_info
*pdi
,
759 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
760 int need_pc
, struct dwarf2_cu
*cu
);
762 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
763 CORE_ADDR
*highpc
, int need_pc
,
764 struct dwarf2_cu
*cu
);
766 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
767 struct dwarf2_cu
*cu
);
769 static void add_partial_subprogram (struct partial_die_info
*pdi
,
770 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
771 int need_pc
, struct dwarf2_cu
*cu
);
773 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
774 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
775 bfd
*abfd
, struct dwarf2_cu
*cu
);
777 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
779 static void psymtab_to_symtab_1 (struct partial_symtab
*);
781 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
783 static void dwarf2_free_abbrev_table (void *);
785 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
788 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
791 static struct partial_die_info
*load_partial_dies (bfd
*,
792 gdb_byte
*, gdb_byte
*,
793 int, struct dwarf2_cu
*);
795 static gdb_byte
*read_partial_die (struct partial_die_info
*,
796 struct abbrev_info
*abbrev
,
798 gdb_byte
*, gdb_byte
*,
801 static struct partial_die_info
*find_partial_die (unsigned int,
804 static void fixup_partial_die (struct partial_die_info
*,
807 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
808 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
810 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
811 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
813 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
815 static int read_1_signed_byte (bfd
*, gdb_byte
*);
817 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
819 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
821 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
823 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
826 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
828 static LONGEST read_checked_initial_length_and_offset
829 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
830 unsigned int *, unsigned int *);
832 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
835 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
837 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
839 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
841 static char *read_indirect_string (bfd
*, gdb_byte
*,
842 const struct comp_unit_head
*,
845 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
847 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
849 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
851 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
853 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
856 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
860 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
861 struct dwarf2_cu
*cu
);
863 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
865 static struct die_info
*die_specification (struct die_info
*die
,
866 struct dwarf2_cu
**);
868 static void free_line_header (struct line_header
*lh
);
870 static void add_file_name (struct line_header
*, char *, unsigned int,
871 unsigned int, unsigned int);
873 static struct line_header
*(dwarf_decode_line_header
874 (unsigned int offset
,
875 bfd
*abfd
, struct dwarf2_cu
*cu
));
877 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
878 struct dwarf2_cu
*, struct partial_symtab
*);
880 static void dwarf2_start_subfile (char *, char *, char *);
882 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
885 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
888 static void dwarf2_const_value_data (struct attribute
*attr
,
892 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
894 static int need_gnat_info (struct dwarf2_cu
*);
896 static struct type
*die_descriptive_type (struct die_info
*, struct dwarf2_cu
*);
898 static void set_descriptive_type (struct type
*, struct die_info
*,
901 static struct type
*die_containing_type (struct die_info
*,
904 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
906 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
908 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
910 static char *typename_concat (struct obstack
*,
915 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
917 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
919 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
921 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
923 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
924 struct dwarf2_cu
*, struct partial_symtab
*);
926 static int dwarf2_get_pc_bounds (struct die_info
*,
927 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
928 struct partial_symtab
*);
930 static void get_scope_pc_bounds (struct die_info
*,
931 CORE_ADDR
*, CORE_ADDR
*,
934 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
935 CORE_ADDR
, struct dwarf2_cu
*);
937 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
940 static void dwarf2_attach_fields_to_type (struct field_info
*,
941 struct type
*, struct dwarf2_cu
*);
943 static void dwarf2_add_member_fn (struct field_info
*,
944 struct die_info
*, struct type
*,
947 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
948 struct type
*, struct dwarf2_cu
*);
950 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
952 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
954 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
956 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
958 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
960 static const char *namespace_name (struct die_info
*die
,
961 int *is_anonymous
, struct dwarf2_cu
*);
963 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
965 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
967 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
970 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
972 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
974 gdb_byte
**new_info_ptr
,
975 struct die_info
*parent
);
977 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
979 gdb_byte
**new_info_ptr
,
980 struct die_info
*parent
);
982 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
984 gdb_byte
**new_info_ptr
,
985 struct die_info
*parent
);
987 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
988 struct die_info
**, gdb_byte
*,
991 static void process_die (struct die_info
*, struct dwarf2_cu
*);
993 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
996 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
998 static struct die_info
*dwarf2_extension (struct die_info
*die
,
999 struct dwarf2_cu
**);
1001 static char *dwarf_tag_name (unsigned int);
1003 static char *dwarf_attr_name (unsigned int);
1005 static char *dwarf_form_name (unsigned int);
1007 static char *dwarf_stack_op_name (unsigned int);
1009 static char *dwarf_bool_name (unsigned int);
1011 static char *dwarf_type_encoding_name (unsigned int);
1014 static char *dwarf_cfi_name (unsigned int);
1017 static struct die_info
*sibling_die (struct die_info
*);
1019 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1021 static void dump_die_for_error (struct die_info
*);
1023 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1026 /*static*/ void dump_die (struct die_info
*, int max_level
);
1028 static void store_in_ref_table (struct die_info
*,
1029 struct dwarf2_cu
*);
1031 static int is_ref_attr (struct attribute
*);
1033 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1035 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1037 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1039 struct dwarf2_cu
**);
1041 static struct die_info
*follow_die_ref (struct die_info
*,
1043 struct dwarf2_cu
**);
1045 static struct die_info
*follow_die_sig (struct die_info
*,
1047 struct dwarf2_cu
**);
1049 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1050 unsigned int offset
);
1052 static void read_signatured_type (struct objfile
*,
1053 struct signatured_type
*type_sig
);
1055 /* memory allocation interface */
1057 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1059 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1061 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1063 static void initialize_cu_func_list (struct dwarf2_cu
*);
1065 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1066 struct dwarf2_cu
*);
1068 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1069 char *, bfd
*, struct dwarf2_cu
*);
1071 static int attr_form_is_block (struct attribute
*);
1073 static int attr_form_is_section_offset (struct attribute
*);
1075 static int attr_form_is_constant (struct attribute
*);
1077 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1079 struct dwarf2_cu
*cu
);
1081 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1082 struct abbrev_info
*abbrev
,
1083 struct dwarf2_cu
*cu
);
1085 static void free_stack_comp_unit (void *);
1087 static hashval_t
partial_die_hash (const void *item
);
1089 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1091 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1092 (unsigned int offset
, struct objfile
*objfile
);
1094 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1095 (unsigned int offset
, struct objfile
*objfile
);
1097 static struct dwarf2_cu
*alloc_one_comp_unit (struct objfile
*objfile
);
1099 static void free_one_comp_unit (void *);
1101 static void free_cached_comp_units (void *);
1103 static void age_cached_comp_units (void);
1105 static void free_one_cached_comp_unit (void *);
1107 static struct type
*set_die_type (struct die_info
*, struct type
*,
1108 struct dwarf2_cu
*);
1110 static void create_all_comp_units (struct objfile
*);
1112 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1115 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1117 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1118 struct dwarf2_per_cu_data
*);
1120 static void dwarf2_mark (struct dwarf2_cu
*);
1122 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1124 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1126 /* Try to locate the sections we need for DWARF 2 debugging
1127 information and return true if we have enough to do something. */
1130 dwarf2_has_info (struct objfile
*objfile
)
1132 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1133 if (!dwarf2_per_objfile
)
1135 /* Initialize per-objfile state. */
1136 struct dwarf2_per_objfile
*data
1137 = 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
);
1206 if (aflag
& SEC_HAS_CONTENTS
)
1208 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1209 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1212 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1214 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1215 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1217 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1219 dwarf2_per_objfile
->types
.asection
= sectp
;
1220 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1223 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1224 && bfd_section_vma (abfd
, sectp
) == 0)
1225 dwarf2_per_objfile
->has_section_at_zero
= 1;
1228 /* Decompress a section that was compressed using zlib. Store the
1229 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1232 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1233 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1235 bfd
*abfd
= objfile
->obfd
;
1237 error (_("Support for zlib-compressed DWARF data (from '%s') "
1238 "is disabled in this copy of GDB"),
1239 bfd_get_filename (abfd
));
1241 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1242 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1243 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1244 bfd_size_type uncompressed_size
;
1245 gdb_byte
*uncompressed_buffer
;
1248 int header_size
= 12;
1250 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1251 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1252 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1253 bfd_get_filename (abfd
));
1255 /* Read the zlib header. In this case, it should be "ZLIB" followed
1256 by the uncompressed section size, 8 bytes in big-endian order. */
1257 if (compressed_size
< header_size
1258 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1259 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1260 bfd_get_filename (abfd
));
1261 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1262 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1263 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1264 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1265 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1266 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1267 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1268 uncompressed_size
+= compressed_buffer
[11];
1270 /* It is possible the section consists of several compressed
1271 buffers concatenated together, so we uncompress in a loop. */
1275 strm
.avail_in
= compressed_size
- header_size
;
1276 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1277 strm
.avail_out
= uncompressed_size
;
1278 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1280 rc
= inflateInit (&strm
);
1281 while (strm
.avail_in
> 0)
1284 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1285 bfd_get_filename (abfd
), rc
);
1286 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1287 + (uncompressed_size
- strm
.avail_out
));
1288 rc
= inflate (&strm
, Z_FINISH
);
1289 if (rc
!= Z_STREAM_END
)
1290 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1291 bfd_get_filename (abfd
), rc
);
1292 rc
= inflateReset (&strm
);
1294 rc
= inflateEnd (&strm
);
1296 || strm
.avail_out
!= 0)
1297 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1298 bfd_get_filename (abfd
), rc
);
1300 do_cleanups (cleanup
);
1301 *outbuf
= uncompressed_buffer
;
1302 *outsize
= uncompressed_size
;
1306 /* Read the contents of the section SECTP from object file specified by
1307 OBJFILE, store info about the section into INFO.
1308 If the section is compressed, uncompress it before returning. */
1311 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1313 bfd
*abfd
= objfile
->obfd
;
1314 asection
*sectp
= info
->asection
;
1315 gdb_byte
*buf
, *retbuf
;
1316 unsigned char header
[4];
1320 info
->buffer
= NULL
;
1321 info
->was_mmapped
= 0;
1324 if (info
->asection
== NULL
|| info
->size
== 0)
1327 /* Check if the file has a 4-byte header indicating compression. */
1328 if (info
->size
> sizeof (header
)
1329 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1330 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1332 /* Upon decompression, update the buffer and its size. */
1333 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1335 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1343 pagesize
= getpagesize ();
1345 /* Only try to mmap sections which are large enough: we don't want to
1346 waste space due to fragmentation. Also, only try mmap for sections
1347 without relocations. */
1349 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1351 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1352 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1353 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1354 MAP_PRIVATE
, pg_offset
);
1356 if (retbuf
!= MAP_FAILED
)
1358 info
->was_mmapped
= 1;
1359 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1360 #if HAVE_POSIX_MADVISE
1361 posix_madvise (retbuf
, map_length
, POSIX_MADV_WILLNEED
);
1368 /* If we get here, we are a normal, not-compressed section. */
1370 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1372 /* When debugging .o files, we may need to apply relocations; see
1373 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1374 We never compress sections in .o files, so we only need to
1375 try this when the section is not compressed. */
1376 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1379 info
->buffer
= retbuf
;
1383 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1384 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1385 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1386 bfd_get_filename (abfd
));
1389 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1393 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1394 asection
**sectp
, gdb_byte
**bufp
,
1395 bfd_size_type
*sizep
)
1397 struct dwarf2_per_objfile
*data
1398 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1399 struct dwarf2_section_info
*info
;
1401 /* We may see an objfile without any DWARF, in which case we just
1410 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1411 info
= &data
->eh_frame
;
1412 else if (section_is_p (section_name
, FRAME_SECTION
))
1413 info
= &data
->frame
;
1417 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1418 /* We haven't read this section in yet. Do it now. */
1419 dwarf2_read_section (objfile
, info
);
1421 *sectp
= info
->asection
;
1422 *bufp
= info
->buffer
;
1423 *sizep
= info
->size
;
1426 /* Build a partial symbol table. */
1429 dwarf2_build_psymtabs (struct objfile
*objfile
)
1431 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
1433 init_psymbol_list (objfile
, 1024);
1436 dwarf2_build_psymtabs_hard (objfile
);
1439 /* Return TRUE if OFFSET is within CU_HEADER. */
1442 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
1444 unsigned int bottom
= cu_header
->offset
;
1445 unsigned int top
= (cu_header
->offset
1447 + cu_header
->initial_length_size
);
1448 return (offset
>= bottom
&& offset
< top
);
1451 /* Read in the comp unit header information from the debug_info at info_ptr.
1452 NOTE: This leaves members offset, first_die_offset to be filled in
1456 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1457 gdb_byte
*info_ptr
, bfd
*abfd
)
1460 unsigned int bytes_read
;
1462 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
1463 cu_header
->initial_length_size
= bytes_read
;
1464 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
1465 info_ptr
+= bytes_read
;
1466 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1468 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1470 info_ptr
+= bytes_read
;
1471 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1473 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1474 if (signed_addr
< 0)
1475 internal_error (__FILE__
, __LINE__
,
1476 _("read_comp_unit_head: dwarf from non elf file"));
1477 cu_header
->signed_addr_p
= signed_addr
;
1483 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1484 gdb_byte
*buffer
, unsigned int buffer_size
,
1487 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1489 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1491 if (header
->version
!= 2 && header
->version
!= 3)
1492 error (_("Dwarf Error: wrong version in compilation unit header "
1493 "(is %d, should be %d) [in module %s]"), header
->version
,
1494 2, bfd_get_filename (abfd
));
1496 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
1497 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1498 "(offset 0x%lx + 6) [in module %s]"),
1499 (long) header
->abbrev_offset
,
1500 (long) (beg_of_comp_unit
- buffer
),
1501 bfd_get_filename (abfd
));
1503 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1504 > buffer
+ buffer_size
)
1505 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1506 "(offset 0x%lx + 0) [in module %s]"),
1507 (long) header
->length
,
1508 (long) (beg_of_comp_unit
- buffer
),
1509 bfd_get_filename (abfd
));
1514 /* Read in the types comp unit header information from .debug_types entry at
1515 types_ptr. The result is a pointer to one past the end of the header. */
1518 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
1519 ULONGEST
*signature
,
1520 gdb_byte
*types_ptr
, bfd
*abfd
)
1522 unsigned int bytes_read
;
1523 gdb_byte
*initial_types_ptr
= types_ptr
;
1525 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->types
);
1526 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
1528 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
1530 *signature
= read_8_bytes (abfd
, types_ptr
);
1532 types_ptr
+= cu_header
->offset_size
;
1533 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
1538 /* Allocate a new partial symtab for file named NAME and mark this new
1539 partial symtab as being an include of PST. */
1542 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1543 struct objfile
*objfile
)
1545 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1547 subpst
->section_offsets
= pst
->section_offsets
;
1548 subpst
->textlow
= 0;
1549 subpst
->texthigh
= 0;
1551 subpst
->dependencies
= (struct partial_symtab
**)
1552 obstack_alloc (&objfile
->objfile_obstack
,
1553 sizeof (struct partial_symtab
*));
1554 subpst
->dependencies
[0] = pst
;
1555 subpst
->number_of_dependencies
= 1;
1557 subpst
->globals_offset
= 0;
1558 subpst
->n_global_syms
= 0;
1559 subpst
->statics_offset
= 0;
1560 subpst
->n_static_syms
= 0;
1561 subpst
->symtab
= NULL
;
1562 subpst
->read_symtab
= pst
->read_symtab
;
1565 /* No private part is necessary for include psymtabs. This property
1566 can be used to differentiate between such include psymtabs and
1567 the regular ones. */
1568 subpst
->read_symtab_private
= NULL
;
1571 /* Read the Line Number Program data and extract the list of files
1572 included by the source file represented by PST. Build an include
1573 partial symtab for each of these included files. */
1576 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1577 struct die_info
*die
,
1578 struct partial_symtab
*pst
)
1580 struct objfile
*objfile
= cu
->objfile
;
1581 bfd
*abfd
= objfile
->obfd
;
1582 struct line_header
*lh
= NULL
;
1583 struct attribute
*attr
;
1585 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
1588 unsigned int line_offset
= DW_UNSND (attr
);
1589 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
1592 return; /* No linetable, so no includes. */
1594 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1596 free_line_header (lh
);
1600 hash_type_signature (const void *item
)
1602 const struct signatured_type
*type_sig
= item
;
1603 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1604 return type_sig
->signature
;
1608 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
1610 const struct signatured_type
*lhs
= item_lhs
;
1611 const struct signatured_type
*rhs
= item_rhs
;
1612 return lhs
->signature
== rhs
->signature
;
1615 /* Create the hash table of all entries in the .debug_types section.
1616 The result is zero if there is an error (e.g. missing .debug_types section),
1617 otherwise non-zero. */
1620 create_debug_types_hash_table (struct objfile
*objfile
)
1625 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
1626 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
1628 if (info_ptr
== NULL
)
1630 dwarf2_per_objfile
->signatured_types
= NULL
;
1634 types_htab
= htab_create_alloc_ex (41,
1635 hash_type_signature
,
1638 &objfile
->objfile_obstack
,
1639 hashtab_obstack_allocate
,
1640 dummy_obstack_deallocate
);
1642 if (dwarf2_die_debug
)
1643 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
1645 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1647 unsigned int offset
;
1648 unsigned int offset_size
;
1649 unsigned int type_offset
;
1650 unsigned int length
, initial_length_size
;
1651 unsigned short version
;
1653 struct signatured_type
*type_sig
;
1655 gdb_byte
*ptr
= info_ptr
;
1657 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
1659 /* We need to read the type's signature in order to build the hash
1660 table, but we don't need to read anything else just yet. */
1662 /* Sanity check to ensure entire cu is present. */
1663 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
1664 if (ptr
+ length
+ initial_length_size
1665 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1667 complaint (&symfile_complaints
,
1668 _("debug type entry runs off end of `.debug_types' section, ignored"));
1672 offset_size
= initial_length_size
== 4 ? 4 : 8;
1673 ptr
+= initial_length_size
;
1674 version
= bfd_get_16 (objfile
->obfd
, ptr
);
1676 ptr
+= offset_size
; /* abbrev offset */
1677 ptr
+= 1; /* address size */
1678 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
1680 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
1682 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
1683 memset (type_sig
, 0, sizeof (*type_sig
));
1684 type_sig
->signature
= signature
;
1685 type_sig
->offset
= offset
;
1686 type_sig
->type_offset
= type_offset
;
1688 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
1689 gdb_assert (slot
!= NULL
);
1692 if (dwarf2_die_debug
)
1693 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
1694 offset
, phex (signature
, sizeof (signature
)));
1696 info_ptr
= info_ptr
+ initial_length_size
+ length
;
1699 dwarf2_per_objfile
->signatured_types
= types_htab
;
1704 /* Lookup a signature based type.
1705 Returns NULL if SIG is not present in the table. */
1707 static struct signatured_type
*
1708 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
1710 struct signatured_type find_entry
, *entry
;
1712 if (dwarf2_per_objfile
->signatured_types
== NULL
)
1714 complaint (&symfile_complaints
,
1715 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1719 find_entry
.signature
= sig
;
1720 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
1724 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1727 init_cu_die_reader (struct die_reader_specs
*reader
,
1728 struct dwarf2_cu
*cu
)
1730 reader
->abfd
= cu
->objfile
->obfd
;
1732 if (cu
->per_cu
->from_debug_types
)
1734 gdb_assert (dwarf2_per_objfile
->types
.readin
);
1735 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
1739 gdb_assert (dwarf2_per_objfile
->info
.readin
);
1740 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
1744 /* Find the base address of the compilation unit for range lists and
1745 location lists. It will normally be specified by DW_AT_low_pc.
1746 In DWARF-3 draft 4, the base address could be overridden by
1747 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1748 compilation units with discontinuous ranges. */
1751 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
1753 struct attribute
*attr
;
1756 cu
->base_address
= 0;
1758 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
1761 cu
->base_address
= DW_ADDR (attr
);
1766 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
1769 cu
->base_address
= DW_ADDR (attr
);
1775 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1776 to combine the common parts.
1777 Process a compilation unit for a psymtab.
1778 BUFFER is a pointer to the beginning of the dwarf section buffer,
1779 either .debug_info or debug_types.
1780 INFO_PTR is a pointer to the start of the CU.
1781 Returns a pointer to the next CU. */
1784 process_psymtab_comp_unit (struct objfile
*objfile
,
1785 struct dwarf2_per_cu_data
*this_cu
,
1786 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1787 unsigned int buffer_size
)
1789 bfd
*abfd
= objfile
->obfd
;
1790 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1791 struct die_info
*comp_unit_die
;
1792 struct partial_symtab
*pst
;
1794 struct cleanup
*back_to_inner
;
1795 struct dwarf2_cu cu
;
1796 unsigned int bytes_read
;
1797 int has_children
, has_pc_info
;
1798 struct attribute
*attr
;
1800 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
1801 struct die_reader_specs reader_specs
;
1803 memset (&cu
, 0, sizeof (cu
));
1804 cu
.objfile
= objfile
;
1805 obstack_init (&cu
.comp_unit_obstack
);
1807 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1809 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
1810 buffer
, buffer_size
,
1813 /* Complete the cu_header. */
1814 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
1815 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
1817 cu
.list_in_scope
= &file_symbols
;
1819 /* If this compilation unit was already read in, free the
1820 cached copy in order to read it in again. This is
1821 necessary because we skipped some symbols when we first
1822 read in the compilation unit (see load_partial_dies).
1823 This problem could be avoided, but the benefit is
1825 if (this_cu
->cu
!= NULL
)
1826 free_one_cached_comp_unit (this_cu
->cu
);
1828 /* Note that this is a pointer to our stack frame, being
1829 added to a global data structure. It will be cleaned up
1830 in free_stack_comp_unit when we finish with this
1831 compilation unit. */
1833 cu
.per_cu
= this_cu
;
1835 /* Read the abbrevs for this compilation unit into a table. */
1836 dwarf2_read_abbrevs (abfd
, &cu
);
1837 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1839 /* Read the compilation unit die. */
1840 if (this_cu
->from_debug_types
)
1841 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
1842 init_cu_die_reader (&reader_specs
, &cu
);
1843 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
1846 if (this_cu
->from_debug_types
)
1848 /* offset,length haven't been set yet for type units. */
1849 this_cu
->offset
= cu
.header
.offset
;
1850 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
1852 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
1854 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1855 + cu
.header
.initial_length_size
);
1856 do_cleanups (back_to_inner
);
1860 /* Set the language we're debugging. */
1861 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
1863 set_cu_language (DW_UNSND (attr
), &cu
);
1865 set_cu_language (language_minimal
, &cu
);
1867 /* Allocate a new partial symbol table structure. */
1868 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
1869 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1870 (attr
!= NULL
) ? DW_STRING (attr
) : "",
1871 /* TEXTLOW and TEXTHIGH are set below. */
1873 objfile
->global_psymbols
.next
,
1874 objfile
->static_psymbols
.next
);
1876 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
1878 pst
->dirname
= DW_STRING (attr
);
1880 pst
->read_symtab_private
= this_cu
;
1882 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1884 /* Store the function that reads in the rest of the symbol table */
1885 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1887 this_cu
->psymtab
= pst
;
1889 dwarf2_find_base_address (comp_unit_die
, &cu
);
1891 /* Possibly set the default values of LOWPC and HIGHPC from
1893 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
1894 &best_highpc
, &cu
, pst
);
1895 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
1896 /* Store the contiguous range if it is not empty; it can be empty for
1897 CUs with no code. */
1898 addrmap_set_empty (objfile
->psymtabs_addrmap
,
1899 best_lowpc
+ baseaddr
,
1900 best_highpc
+ baseaddr
- 1, pst
);
1902 /* Check if comp unit has_children.
1903 If so, read the rest of the partial symbols from this comp unit.
1904 If not, there's no more debug_info for this comp unit. */
1907 struct partial_die_info
*first_die
;
1908 CORE_ADDR lowpc
, highpc
;
1910 lowpc
= ((CORE_ADDR
) -1);
1911 highpc
= ((CORE_ADDR
) 0);
1913 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
1915 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
1916 ! has_pc_info
, &cu
);
1918 /* If we didn't find a lowpc, set it to highpc to avoid
1919 complaints from `maint check'. */
1920 if (lowpc
== ((CORE_ADDR
) -1))
1923 /* If the compilation unit didn't have an explicit address range,
1924 then use the information extracted from its child dies. */
1928 best_highpc
= highpc
;
1931 pst
->textlow
= best_lowpc
+ baseaddr
;
1932 pst
->texthigh
= best_highpc
+ baseaddr
;
1934 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1935 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1936 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1937 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1938 sort_pst_symbols (pst
);
1940 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1941 + cu
.header
.initial_length_size
);
1943 if (this_cu
->from_debug_types
)
1945 /* It's not clear we want to do anything with stmt lists here.
1946 Waiting to see what gcc ultimately does. */
1950 /* Get the list of files included in the current compilation unit,
1951 and build a psymtab for each of them. */
1952 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
1955 do_cleanups (back_to_inner
);
1960 /* Traversal function for htab_traverse_noresize.
1961 Process one .debug_types comp-unit. */
1964 process_type_comp_unit (void **slot
, void *info
)
1966 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
1967 struct objfile
*objfile
= (struct objfile
*) info
;
1968 struct dwarf2_per_cu_data
*this_cu
;
1970 this_cu
= &entry
->per_cu
;
1971 this_cu
->from_debug_types
= 1;
1973 gdb_assert (dwarf2_per_objfile
->types
.readin
);
1974 process_psymtab_comp_unit (objfile
, this_cu
,
1975 dwarf2_per_objfile
->types
.buffer
,
1976 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
1977 dwarf2_per_objfile
->types
.size
);
1982 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
1983 Build partial symbol tables for the .debug_types comp-units. */
1986 build_type_psymtabs (struct objfile
*objfile
)
1988 if (! create_debug_types_hash_table (objfile
))
1991 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
1992 process_type_comp_unit
, objfile
);
1995 /* Build the partial symbol table by doing a quick pass through the
1996 .debug_info and .debug_abbrev sections. */
1999 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
2001 bfd
*abfd
= objfile
->obfd
;
2003 struct cleanup
*back_to
;
2005 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
2006 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2008 /* Any cached compilation units will be linked by the per-objfile
2009 read_in_chain. Make sure to free them when we're done. */
2010 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2012 build_type_psymtabs (objfile
);
2014 create_all_comp_units (objfile
);
2016 objfile
->psymtabs_addrmap
=
2017 addrmap_create_mutable (&objfile
->objfile_obstack
);
2019 /* Since the objects we're extracting from .debug_info vary in
2020 length, only the individual functions to extract them (like
2021 read_comp_unit_head and load_partial_die) can really know whether
2022 the buffer is large enough to hold another complete object.
2024 At the moment, they don't actually check that. If .debug_info
2025 holds just one extra byte after the last compilation unit's dies,
2026 then read_comp_unit_head will happily read off the end of the
2027 buffer. read_partial_die is similarly casual. Those functions
2030 For this loop condition, simply checking whether there's any data
2031 left at all should be sufficient. */
2033 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
2034 + dwarf2_per_objfile
->info
.size
))
2036 struct dwarf2_per_cu_data
*this_cu
;
2038 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
2041 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
2042 dwarf2_per_objfile
->info
.buffer
,
2044 dwarf2_per_objfile
->info
.size
);
2047 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
2048 &objfile
->objfile_obstack
);
2050 do_cleanups (back_to
);
2053 /* Load the partial DIEs for a secondary CU into memory. */
2056 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
2057 struct objfile
*objfile
)
2059 bfd
*abfd
= objfile
->obfd
;
2060 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
2061 struct die_info
*comp_unit_die
;
2062 struct dwarf2_cu
*cu
;
2063 unsigned int bytes_read
;
2064 struct cleanup
*back_to
;
2065 struct attribute
*attr
;
2067 struct die_reader_specs reader_specs
;
2069 gdb_assert (! this_cu
->from_debug_types
);
2071 gdb_assert (dwarf2_per_objfile
->info
.readin
);
2072 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
2073 beg_of_comp_unit
= info_ptr
;
2075 cu
= alloc_one_comp_unit (objfile
);
2077 /* ??? Missing cleanup for CU? */
2079 /* Link this compilation unit into the compilation unit tree. */
2081 cu
->per_cu
= this_cu
;
2082 cu
->type_hash
= this_cu
->type_hash
;
2084 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
2085 dwarf2_per_objfile
->info
.buffer
,
2086 dwarf2_per_objfile
->info
.size
,
2089 /* Complete the cu_header. */
2090 cu
->header
.offset
= this_cu
->offset
;
2091 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2093 /* Read the abbrevs for this compilation unit into a table. */
2094 dwarf2_read_abbrevs (abfd
, cu
);
2095 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2097 /* Read the compilation unit die. */
2098 init_cu_die_reader (&reader_specs
, cu
);
2099 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2102 /* Set the language we're debugging. */
2103 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
2105 set_cu_language (DW_UNSND (attr
), cu
);
2107 set_cu_language (language_minimal
, cu
);
2109 /* Check if comp unit has_children.
2110 If so, read the rest of the partial symbols from this comp unit.
2111 If not, there's no more debug_info for this comp unit. */
2113 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
2115 do_cleanups (back_to
);
2118 /* Create a list of all compilation units in OBJFILE. We do this only
2119 if an inter-comp-unit reference is found; presumably if there is one,
2120 there will be many, and one will occur early in the .debug_info section.
2121 So there's no point in building this list incrementally. */
2124 create_all_comp_units (struct objfile
*objfile
)
2128 struct dwarf2_per_cu_data
**all_comp_units
;
2131 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
2132 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2136 all_comp_units
= xmalloc (n_allocated
2137 * sizeof (struct dwarf2_per_cu_data
*));
2139 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
2141 unsigned int length
, initial_length_size
;
2142 gdb_byte
*beg_of_comp_unit
;
2143 struct dwarf2_per_cu_data
*this_cu
;
2144 unsigned int offset
;
2146 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
2148 /* Read just enough information to find out where the next
2149 compilation unit is. */
2150 length
= read_initial_length (objfile
->obfd
, info_ptr
,
2151 &initial_length_size
);
2153 /* Save the compilation unit for later lookup. */
2154 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
2155 sizeof (struct dwarf2_per_cu_data
));
2156 memset (this_cu
, 0, sizeof (*this_cu
));
2157 this_cu
->offset
= offset
;
2158 this_cu
->length
= length
+ initial_length_size
;
2160 if (n_comp_units
== n_allocated
)
2163 all_comp_units
= xrealloc (all_comp_units
,
2165 * sizeof (struct dwarf2_per_cu_data
*));
2167 all_comp_units
[n_comp_units
++] = this_cu
;
2169 info_ptr
= info_ptr
+ this_cu
->length
;
2172 dwarf2_per_objfile
->all_comp_units
2173 = obstack_alloc (&objfile
->objfile_obstack
,
2174 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2175 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
2176 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2177 xfree (all_comp_units
);
2178 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
2181 /* Process all loaded DIEs for compilation unit CU, starting at
2182 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2183 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2184 DW_AT_ranges). If NEED_PC is set, then this function will set
2185 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2186 and record the covered ranges in the addrmap. */
2189 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
2190 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2192 struct objfile
*objfile
= cu
->objfile
;
2193 bfd
*abfd
= objfile
->obfd
;
2194 struct partial_die_info
*pdi
;
2196 /* Now, march along the PDI's, descending into ones which have
2197 interesting children but skipping the children of the other ones,
2198 until we reach the end of the compilation unit. */
2204 fixup_partial_die (pdi
, cu
);
2206 /* Anonymous namespaces have no name but have interesting
2207 children, so we need to look at them. Ditto for anonymous
2210 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
2211 || pdi
->tag
== DW_TAG_enumeration_type
)
2215 case DW_TAG_subprogram
:
2216 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2218 case DW_TAG_variable
:
2219 case DW_TAG_typedef
:
2220 case DW_TAG_union_type
:
2221 if (!pdi
->is_declaration
)
2223 add_partial_symbol (pdi
, cu
);
2226 case DW_TAG_class_type
:
2227 case DW_TAG_interface_type
:
2228 case DW_TAG_structure_type
:
2229 if (!pdi
->is_declaration
)
2231 add_partial_symbol (pdi
, cu
);
2234 case DW_TAG_enumeration_type
:
2235 if (!pdi
->is_declaration
)
2236 add_partial_enumeration (pdi
, cu
);
2238 case DW_TAG_base_type
:
2239 case DW_TAG_subrange_type
:
2240 /* File scope base type definitions are added to the partial
2242 add_partial_symbol (pdi
, cu
);
2244 case DW_TAG_namespace
:
2245 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
2248 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
2255 /* If the die has a sibling, skip to the sibling. */
2257 pdi
= pdi
->die_sibling
;
2261 /* Functions used to compute the fully scoped name of a partial DIE.
2263 Normally, this is simple. For C++, the parent DIE's fully scoped
2264 name is concatenated with "::" and the partial DIE's name. For
2265 Java, the same thing occurs except that "." is used instead of "::".
2266 Enumerators are an exception; they use the scope of their parent
2267 enumeration type, i.e. the name of the enumeration type is not
2268 prepended to the enumerator.
2270 There are two complexities. One is DW_AT_specification; in this
2271 case "parent" means the parent of the target of the specification,
2272 instead of the direct parent of the DIE. The other is compilers
2273 which do not emit DW_TAG_namespace; in this case we try to guess
2274 the fully qualified name of structure types from their members'
2275 linkage names. This must be done using the DIE's children rather
2276 than the children of any DW_AT_specification target. We only need
2277 to do this for structures at the top level, i.e. if the target of
2278 any DW_AT_specification (if any; otherwise the DIE itself) does not
2281 /* Compute the scope prefix associated with PDI's parent, in
2282 compilation unit CU. The result will be allocated on CU's
2283 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2284 field. NULL is returned if no prefix is necessary. */
2286 partial_die_parent_scope (struct partial_die_info
*pdi
,
2287 struct dwarf2_cu
*cu
)
2289 char *grandparent_scope
;
2290 struct partial_die_info
*parent
, *real_pdi
;
2292 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2293 then this means the parent of the specification DIE. */
2296 while (real_pdi
->has_specification
)
2297 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2299 parent
= real_pdi
->die_parent
;
2303 if (parent
->scope_set
)
2304 return parent
->scope
;
2306 fixup_partial_die (parent
, cu
);
2308 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
2310 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
2311 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
2312 Work around this problem here. */
2313 if (cu
->language
== language_cplus
2314 && parent
->tag
== DW_TAG_namespace
2315 && strcmp (parent
->name
, "::") == 0
2316 && grandparent_scope
== NULL
)
2318 parent
->scope
= NULL
;
2319 parent
->scope_set
= 1;
2323 if (parent
->tag
== DW_TAG_namespace
2324 || parent
->tag
== DW_TAG_structure_type
2325 || parent
->tag
== DW_TAG_class_type
2326 || parent
->tag
== DW_TAG_interface_type
2327 || parent
->tag
== DW_TAG_union_type
2328 || parent
->tag
== DW_TAG_enumeration_type
)
2330 if (grandparent_scope
== NULL
)
2331 parent
->scope
= parent
->name
;
2333 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
2336 else if (parent
->tag
== DW_TAG_enumerator
)
2337 /* Enumerators should not get the name of the enumeration as a prefix. */
2338 parent
->scope
= grandparent_scope
;
2341 /* FIXME drow/2004-04-01: What should we be doing with
2342 function-local names? For partial symbols, we should probably be
2344 complaint (&symfile_complaints
,
2345 _("unhandled containing DIE tag %d for DIE at %d"),
2346 parent
->tag
, pdi
->offset
);
2347 parent
->scope
= grandparent_scope
;
2350 parent
->scope_set
= 1;
2351 return parent
->scope
;
2354 /* Return the fully scoped name associated with PDI, from compilation unit
2355 CU. The result will be allocated with malloc. */
2357 partial_die_full_name (struct partial_die_info
*pdi
,
2358 struct dwarf2_cu
*cu
)
2362 parent_scope
= partial_die_parent_scope (pdi
, cu
);
2363 if (parent_scope
== NULL
)
2366 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
2370 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
2372 struct objfile
*objfile
= cu
->objfile
;
2374 char *actual_name
= NULL
;
2375 const char *my_prefix
;
2376 const struct partial_symbol
*psym
= NULL
;
2378 int built_actual_name
= 0;
2380 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2382 actual_name
= partial_die_full_name (pdi
, cu
);
2384 built_actual_name
= 1;
2386 if (actual_name
== NULL
)
2387 actual_name
= pdi
->name
;
2391 case DW_TAG_subprogram
:
2392 if (pdi
->is_external
|| cu
->language
== language_ada
)
2394 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2395 of the global scope. But in Ada, we want to be able to access
2396 nested procedures globally. So all Ada subprograms are stored
2397 in the global scope. */
2398 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2399 mst_text, objfile); */
2400 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2402 VAR_DOMAIN
, LOC_BLOCK
,
2403 &objfile
->global_psymbols
,
2404 0, pdi
->lowpc
+ baseaddr
,
2405 cu
->language
, objfile
);
2409 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2410 mst_file_text, objfile); */
2411 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2413 VAR_DOMAIN
, LOC_BLOCK
,
2414 &objfile
->static_psymbols
,
2415 0, pdi
->lowpc
+ baseaddr
,
2416 cu
->language
, objfile
);
2419 case DW_TAG_variable
:
2420 if (pdi
->is_external
)
2423 Don't enter into the minimal symbol tables as there is
2424 a minimal symbol table entry from the ELF symbols already.
2425 Enter into partial symbol table if it has a location
2426 descriptor or a type.
2427 If the location descriptor is missing, new_symbol will create
2428 a LOC_UNRESOLVED symbol, the address of the variable will then
2429 be determined from the minimal symbol table whenever the variable
2431 The address for the partial symbol table entry is not
2432 used by GDB, but it comes in handy for debugging partial symbol
2436 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2437 if (pdi
->locdesc
|| pdi
->has_type
)
2438 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2440 VAR_DOMAIN
, LOC_STATIC
,
2441 &objfile
->global_psymbols
,
2443 cu
->language
, objfile
);
2447 /* Static Variable. Skip symbols without location descriptors. */
2448 if (pdi
->locdesc
== NULL
)
2450 if (built_actual_name
)
2451 xfree (actual_name
);
2454 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2455 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2456 mst_file_data, objfile); */
2457 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2459 VAR_DOMAIN
, LOC_STATIC
,
2460 &objfile
->static_psymbols
,
2462 cu
->language
, objfile
);
2465 case DW_TAG_typedef
:
2466 case DW_TAG_base_type
:
2467 case DW_TAG_subrange_type
:
2468 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2470 VAR_DOMAIN
, LOC_TYPEDEF
,
2471 &objfile
->static_psymbols
,
2472 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2474 case DW_TAG_namespace
:
2475 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2477 VAR_DOMAIN
, LOC_TYPEDEF
,
2478 &objfile
->global_psymbols
,
2479 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2481 case DW_TAG_class_type
:
2482 case DW_TAG_interface_type
:
2483 case DW_TAG_structure_type
:
2484 case DW_TAG_union_type
:
2485 case DW_TAG_enumeration_type
:
2486 /* Skip external references. The DWARF standard says in the section
2487 about "Structure, Union, and Class Type Entries": "An incomplete
2488 structure, union or class type is represented by a structure,
2489 union or class entry that does not have a byte size attribute
2490 and that has a DW_AT_declaration attribute." */
2491 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2493 if (built_actual_name
)
2494 xfree (actual_name
);
2498 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2499 static vs. global. */
2500 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2502 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2503 (cu
->language
== language_cplus
2504 || cu
->language
== language_java
)
2505 ? &objfile
->global_psymbols
2506 : &objfile
->static_psymbols
,
2507 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2510 case DW_TAG_enumerator
:
2511 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2513 VAR_DOMAIN
, LOC_CONST
,
2514 (cu
->language
== language_cplus
2515 || cu
->language
== language_java
)
2516 ? &objfile
->global_psymbols
2517 : &objfile
->static_psymbols
,
2518 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2524 if (built_actual_name
)
2525 xfree (actual_name
);
2528 /* Read a partial die corresponding to a namespace; also, add a symbol
2529 corresponding to that namespace to the symbol table. NAMESPACE is
2530 the name of the enclosing namespace. */
2533 add_partial_namespace (struct partial_die_info
*pdi
,
2534 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2535 int need_pc
, struct dwarf2_cu
*cu
)
2537 struct objfile
*objfile
= cu
->objfile
;
2539 /* Add a symbol for the namespace. */
2541 add_partial_symbol (pdi
, cu
);
2543 /* Now scan partial symbols in that namespace. */
2545 if (pdi
->has_children
)
2546 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2549 /* Read a partial die corresponding to a Fortran module. */
2552 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
2553 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2555 /* Now scan partial symbols in that module.
2557 FIXME: Support the separate Fortran module namespaces. */
2559 if (pdi
->has_children
)
2560 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2563 /* Read a partial die corresponding to a subprogram and create a partial
2564 symbol for that subprogram. When the CU language allows it, this
2565 routine also defines a partial symbol for each nested subprogram
2566 that this subprogram contains.
2568 DIE my also be a lexical block, in which case we simply search
2569 recursively for suprograms defined inside that lexical block.
2570 Again, this is only performed when the CU language allows this
2571 type of definitions. */
2574 add_partial_subprogram (struct partial_die_info
*pdi
,
2575 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2576 int need_pc
, struct dwarf2_cu
*cu
)
2578 if (pdi
->tag
== DW_TAG_subprogram
)
2580 if (pdi
->has_pc_info
)
2582 if (pdi
->lowpc
< *lowpc
)
2583 *lowpc
= pdi
->lowpc
;
2584 if (pdi
->highpc
> *highpc
)
2585 *highpc
= pdi
->highpc
;
2589 struct objfile
*objfile
= cu
->objfile
;
2591 baseaddr
= ANOFFSET (objfile
->section_offsets
,
2592 SECT_OFF_TEXT (objfile
));
2593 addrmap_set_empty (objfile
->psymtabs_addrmap
,
2594 pdi
->lowpc
+ baseaddr
,
2595 pdi
->highpc
- 1 + baseaddr
,
2596 cu
->per_cu
->psymtab
);
2598 if (!pdi
->is_declaration
)
2599 /* Ignore subprogram DIEs that do not have a name, they are
2600 illegal. Do not emit a complaint at this point, we will
2601 do so when we convert this psymtab into a symtab. */
2603 add_partial_symbol (pdi
, cu
);
2607 if (! pdi
->has_children
)
2610 if (cu
->language
== language_ada
)
2612 pdi
= pdi
->die_child
;
2615 fixup_partial_die (pdi
, cu
);
2616 if (pdi
->tag
== DW_TAG_subprogram
2617 || pdi
->tag
== DW_TAG_lexical_block
)
2618 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2619 pdi
= pdi
->die_sibling
;
2624 /* See if we can figure out if the class lives in a namespace. We do
2625 this by looking for a member function; its demangled name will
2626 contain namespace info, if there is any. */
2629 guess_structure_name (struct partial_die_info
*struct_pdi
,
2630 struct dwarf2_cu
*cu
)
2632 if ((cu
->language
== language_cplus
2633 || cu
->language
== language_java
)
2634 && cu
->has_namespace_info
== 0
2635 && struct_pdi
->has_children
)
2637 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2638 what template types look like, because the demangler
2639 frequently doesn't give the same name as the debug info. We
2640 could fix this by only using the demangled name to get the
2641 prefix (but see comment in read_structure_type). */
2643 struct partial_die_info
*real_pdi
;
2645 /* If this DIE (this DIE's specification, if any) has a parent, then
2646 we should not do this. We'll prepend the parent's fully qualified
2647 name when we create the partial symbol. */
2649 real_pdi
= struct_pdi
;
2650 while (real_pdi
->has_specification
)
2651 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2653 if (real_pdi
->die_parent
!= NULL
)
2658 /* Read a partial die corresponding to an enumeration type. */
2661 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2662 struct dwarf2_cu
*cu
)
2664 struct objfile
*objfile
= cu
->objfile
;
2665 bfd
*abfd
= objfile
->obfd
;
2666 struct partial_die_info
*pdi
;
2668 if (enum_pdi
->name
!= NULL
)
2669 add_partial_symbol (enum_pdi
, cu
);
2671 pdi
= enum_pdi
->die_child
;
2674 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2675 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2677 add_partial_symbol (pdi
, cu
);
2678 pdi
= pdi
->die_sibling
;
2682 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2683 Return the corresponding abbrev, or NULL if the number is zero (indicating
2684 an empty DIE). In either case *BYTES_READ will be set to the length of
2685 the initial number. */
2687 static struct abbrev_info
*
2688 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2689 struct dwarf2_cu
*cu
)
2691 bfd
*abfd
= cu
->objfile
->obfd
;
2692 unsigned int abbrev_number
;
2693 struct abbrev_info
*abbrev
;
2695 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2697 if (abbrev_number
== 0)
2700 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2703 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2704 bfd_get_filename (abfd
));
2710 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2711 Returns a pointer to the end of a series of DIEs, terminated by an empty
2712 DIE. Any children of the skipped DIEs will also be skipped. */
2715 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2717 struct abbrev_info
*abbrev
;
2718 unsigned int bytes_read
;
2722 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2724 return info_ptr
+ bytes_read
;
2726 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
2730 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2731 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2732 abbrev corresponding to that skipped uleb128 should be passed in
2733 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2737 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2738 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
2740 unsigned int bytes_read
;
2741 struct attribute attr
;
2742 bfd
*abfd
= cu
->objfile
->obfd
;
2743 unsigned int form
, i
;
2745 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2747 /* The only abbrev we care about is DW_AT_sibling. */
2748 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2750 read_attribute (&attr
, &abbrev
->attrs
[i
],
2751 abfd
, info_ptr
, cu
);
2752 if (attr
.form
== DW_FORM_ref_addr
)
2753 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2755 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
2758 /* If it isn't DW_AT_sibling, skip this attribute. */
2759 form
= abbrev
->attrs
[i
].form
;
2763 case DW_FORM_ref_addr
:
2764 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
2765 and later it is offset sized. */
2766 if (cu
->header
.version
== 2)
2767 info_ptr
+= cu
->header
.addr_size
;
2769 info_ptr
+= cu
->header
.offset_size
;
2772 info_ptr
+= cu
->header
.addr_size
;
2792 case DW_FORM_string
:
2793 read_string (abfd
, info_ptr
, &bytes_read
);
2794 info_ptr
+= bytes_read
;
2797 info_ptr
+= cu
->header
.offset_size
;
2800 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2801 info_ptr
+= bytes_read
;
2803 case DW_FORM_block1
:
2804 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2806 case DW_FORM_block2
:
2807 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2809 case DW_FORM_block4
:
2810 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2814 case DW_FORM_ref_udata
:
2815 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2817 case DW_FORM_indirect
:
2818 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2819 info_ptr
+= bytes_read
;
2820 /* We need to continue parsing from here, so just go back to
2822 goto skip_attribute
;
2825 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2826 dwarf_form_name (form
),
2827 bfd_get_filename (abfd
));
2831 if (abbrev
->has_children
)
2832 return skip_children (buffer
, info_ptr
, cu
);
2837 /* Locate ORIG_PDI's sibling.
2838 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2842 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
2843 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2844 bfd
*abfd
, struct dwarf2_cu
*cu
)
2846 /* Do we know the sibling already? */
2848 if (orig_pdi
->sibling
)
2849 return orig_pdi
->sibling
;
2851 /* Are there any children to deal with? */
2853 if (!orig_pdi
->has_children
)
2856 /* Skip the children the long way. */
2858 return skip_children (buffer
, info_ptr
, cu
);
2861 /* Expand this partial symbol table into a full symbol table. */
2864 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2866 /* FIXME: This is barely more than a stub. */
2871 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2877 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2878 gdb_flush (gdb_stdout
);
2881 /* Restore our global data. */
2882 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2883 dwarf2_objfile_data_key
);
2885 /* If this psymtab is constructed from a debug-only objfile, the
2886 has_section_at_zero flag will not necessarily be correct. We
2887 can get the correct value for this flag by looking at the data
2888 associated with the (presumably stripped) associated objfile. */
2889 if (pst
->objfile
->separate_debug_objfile_backlink
)
2891 struct dwarf2_per_objfile
*dpo_backlink
2892 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
2893 dwarf2_objfile_data_key
);
2894 dwarf2_per_objfile
->has_section_at_zero
2895 = dpo_backlink
->has_section_at_zero
;
2898 psymtab_to_symtab_1 (pst
);
2900 /* Finish up the debug error message. */
2902 printf_filtered (_("done.\n"));
2907 /* Add PER_CU to the queue. */
2910 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2912 struct dwarf2_queue_item
*item
;
2915 item
= xmalloc (sizeof (*item
));
2916 item
->per_cu
= per_cu
;
2919 if (dwarf2_queue
== NULL
)
2920 dwarf2_queue
= item
;
2922 dwarf2_queue_tail
->next
= item
;
2924 dwarf2_queue_tail
= item
;
2927 /* Process the queue. */
2930 process_queue (struct objfile
*objfile
)
2932 struct dwarf2_queue_item
*item
, *next_item
;
2934 /* The queue starts out with one item, but following a DIE reference
2935 may load a new CU, adding it to the end of the queue. */
2936 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
2938 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
2939 process_full_comp_unit (item
->per_cu
);
2941 item
->per_cu
->queued
= 0;
2942 next_item
= item
->next
;
2946 dwarf2_queue_tail
= NULL
;
2949 /* Free all allocated queue entries. This function only releases anything if
2950 an error was thrown; if the queue was processed then it would have been
2951 freed as we went along. */
2954 dwarf2_release_queue (void *dummy
)
2956 struct dwarf2_queue_item
*item
, *last
;
2958 item
= dwarf2_queue
;
2961 /* Anything still marked queued is likely to be in an
2962 inconsistent state, so discard it. */
2963 if (item
->per_cu
->queued
)
2965 if (item
->per_cu
->cu
!= NULL
)
2966 free_one_cached_comp_unit (item
->per_cu
->cu
);
2967 item
->per_cu
->queued
= 0;
2975 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
2978 /* Read in full symbols for PST, and anything it depends on. */
2981 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2983 struct dwarf2_per_cu_data
*per_cu
;
2984 struct cleanup
*back_to
;
2987 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2988 if (!pst
->dependencies
[i
]->readin
)
2990 /* Inform about additional files that need to be read in. */
2993 /* FIXME: i18n: Need to make this a single string. */
2994 fputs_filtered (" ", gdb_stdout
);
2996 fputs_filtered ("and ", gdb_stdout
);
2998 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2999 wrap_here (""); /* Flush output */
3000 gdb_flush (gdb_stdout
);
3002 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
3005 per_cu
= pst
->read_symtab_private
;
3009 /* It's an include file, no symbols to read for it.
3010 Everything is in the parent symtab. */
3015 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
3017 queue_comp_unit (per_cu
, pst
->objfile
);
3019 if (per_cu
->from_debug_types
)
3020 read_signatured_type_at_offset (pst
->objfile
, per_cu
->offset
);
3022 load_full_comp_unit (per_cu
, pst
->objfile
);
3024 process_queue (pst
->objfile
);
3026 /* Age the cache, releasing compilation units that have not
3027 been used recently. */
3028 age_cached_comp_units ();
3030 do_cleanups (back_to
);
3033 /* Load the DIEs associated with PER_CU into memory. */
3036 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3038 bfd
*abfd
= objfile
->obfd
;
3039 struct dwarf2_cu
*cu
;
3040 unsigned int offset
;
3041 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3042 struct cleanup
*back_to
, *free_cu_cleanup
;
3043 struct attribute
*attr
;
3046 gdb_assert (! per_cu
->from_debug_types
);
3048 /* Set local variables from the partial symbol table info. */
3049 offset
= per_cu
->offset
;
3051 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3052 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
3053 beg_of_comp_unit
= info_ptr
;
3055 cu
= alloc_one_comp_unit (objfile
);
3057 /* If an error occurs while loading, release our storage. */
3058 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3060 /* Read in the comp_unit header. */
3061 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
3063 /* Complete the cu_header. */
3064 cu
->header
.offset
= offset
;
3065 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3067 /* Read the abbrevs for this compilation unit. */
3068 dwarf2_read_abbrevs (abfd
, cu
);
3069 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3071 /* Link this compilation unit into the compilation unit tree. */
3073 cu
->per_cu
= per_cu
;
3074 cu
->type_hash
= per_cu
->type_hash
;
3076 cu
->dies
= read_comp_unit (info_ptr
, cu
);
3078 /* We try not to read any attributes in this function, because not
3079 all objfiles needed for references have been loaded yet, and symbol
3080 table processing isn't initialized. But we have to set the CU language,
3081 or we won't be able to build types correctly. */
3082 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
3084 set_cu_language (DW_UNSND (attr
), cu
);
3086 set_cu_language (language_minimal
, cu
);
3088 /* Similarly, if we do not read the producer, we can not apply
3089 producer-specific interpretation. */
3090 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
3092 cu
->producer
= DW_STRING (attr
);
3094 /* Link this CU into read_in_chain. */
3095 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3096 dwarf2_per_objfile
->read_in_chain
= per_cu
;
3098 do_cleanups (back_to
);
3100 /* We've successfully allocated this compilation unit. Let our caller
3101 clean it up when finished with it. */
3102 discard_cleanups (free_cu_cleanup
);
3105 /* Generate full symbol information for PST and CU, whose DIEs have
3106 already been loaded into memory. */
3109 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
3111 struct partial_symtab
*pst
= per_cu
->psymtab
;
3112 struct dwarf2_cu
*cu
= per_cu
->cu
;
3113 struct objfile
*objfile
= pst
->objfile
;
3114 bfd
*abfd
= objfile
->obfd
;
3115 CORE_ADDR lowpc
, highpc
;
3116 struct symtab
*symtab
;
3117 struct cleanup
*back_to
;
3120 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3123 back_to
= make_cleanup (really_free_pendings
, NULL
);
3125 cu
->list_in_scope
= &file_symbols
;
3127 dwarf2_find_base_address (cu
->dies
, cu
);
3129 /* Do line number decoding in read_file_scope () */
3130 process_die (cu
->dies
, cu
);
3132 /* Some compilers don't define a DW_AT_high_pc attribute for the
3133 compilation unit. If the DW_AT_high_pc is missing, synthesize
3134 it, by scanning the DIE's below the compilation unit. */
3135 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
3137 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
3139 /* Set symtab language to language from DW_AT_language.
3140 If the compilation is from a C file generated by language preprocessors,
3141 do not set the language if it was already deduced by start_subfile. */
3143 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
3145 symtab
->language
= cu
->language
;
3147 pst
->symtab
= symtab
;
3150 do_cleanups (back_to
);
3153 /* Process a die and its children. */
3156 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
3160 case DW_TAG_padding
:
3162 case DW_TAG_compile_unit
:
3163 read_file_scope (die
, cu
);
3165 case DW_TAG_type_unit
:
3166 read_type_unit_scope (die
, cu
);
3168 case DW_TAG_subprogram
:
3169 case DW_TAG_inlined_subroutine
:
3170 read_func_scope (die
, cu
);
3172 case DW_TAG_lexical_block
:
3173 case DW_TAG_try_block
:
3174 case DW_TAG_catch_block
:
3175 read_lexical_block_scope (die
, cu
);
3177 case DW_TAG_class_type
:
3178 case DW_TAG_interface_type
:
3179 case DW_TAG_structure_type
:
3180 case DW_TAG_union_type
:
3181 process_structure_scope (die
, cu
);
3183 case DW_TAG_enumeration_type
:
3184 process_enumeration_scope (die
, cu
);
3187 /* These dies have a type, but processing them does not create
3188 a symbol or recurse to process the children. Therefore we can
3189 read them on-demand through read_type_die. */
3190 case DW_TAG_subroutine_type
:
3191 case DW_TAG_set_type
:
3192 case DW_TAG_array_type
:
3193 case DW_TAG_pointer_type
:
3194 case DW_TAG_ptr_to_member_type
:
3195 case DW_TAG_reference_type
:
3196 case DW_TAG_string_type
:
3199 case DW_TAG_base_type
:
3200 case DW_TAG_subrange_type
:
3201 case DW_TAG_typedef
:
3202 /* Add a typedef symbol for the type definition, if it has a
3204 new_symbol (die
, read_type_die (die
, cu
), cu
);
3206 case DW_TAG_common_block
:
3207 read_common_block (die
, cu
);
3209 case DW_TAG_common_inclusion
:
3211 case DW_TAG_namespace
:
3212 processing_has_namespace_info
= 1;
3213 read_namespace (die
, cu
);
3216 read_module (die
, cu
);
3218 case DW_TAG_imported_declaration
:
3219 case DW_TAG_imported_module
:
3220 processing_has_namespace_info
= 1;
3221 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
3222 || cu
->language
!= language_fortran
))
3223 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
3224 dwarf_tag_name (die
->tag
));
3225 read_import_statement (die
, cu
);
3228 new_symbol (die
, NULL
, cu
);
3233 /* A helper function for dwarf2_compute_name which determines whether DIE
3234 needs to have the name of the scope prepended to the name listed in the
3238 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
3240 struct attribute
*attr
;
3244 case DW_TAG_namespace
:
3245 case DW_TAG_typedef
:
3246 case DW_TAG_class_type
:
3247 case DW_TAG_interface_type
:
3248 case DW_TAG_structure_type
:
3249 case DW_TAG_union_type
:
3250 case DW_TAG_enumeration_type
:
3251 case DW_TAG_enumerator
:
3252 case DW_TAG_subprogram
:
3256 case DW_TAG_variable
:
3257 /* We only need to prefix "globally" visible variables. These include
3258 any variable marked with DW_AT_external or any variable that
3259 lives in a namespace. [Variables in anonymous namespaces
3260 require prefixing, but they are not DW_AT_external.] */
3262 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
3264 struct dwarf2_cu
*spec_cu
= cu
;
3265 return die_needs_namespace (die_specification (die
, &spec_cu
),
3269 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
3270 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
)
3272 /* A variable in a lexical block of some kind does not need a
3273 namespace, even though in C++ such variables may be external
3274 and have a mangled name. */
3275 if (die
->parent
->tag
== DW_TAG_lexical_block
3276 || die
->parent
->tag
== DW_TAG_try_block
3277 || die
->parent
->tag
== DW_TAG_catch_block
3278 || die
->parent
->tag
== DW_TAG_subprogram
)
3287 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
3288 compute the physname for the object, which include a method's
3289 formal parameters (C++/Java) and return type (Java).
3291 For Ada, return the DIE's linkage name rather than the fully qualified
3292 name. PHYSNAME is ignored..
3294 The result is allocated on the objfile_obstack and canonicalized. */
3297 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
3301 name
= dwarf2_name (die
, cu
);
3303 /* These are the only languages we know how to qualify names in. */
3305 && (cu
->language
== language_cplus
|| cu
->language
== language_java
))
3307 if (die_needs_namespace (die
, cu
))
3311 struct ui_file
*buf
;
3313 prefix
= determine_prefix (die
, cu
);
3314 buf
= mem_fileopen ();
3315 if (*prefix
!= '\0')
3317 char *prefixed_name
= typename_concat (NULL
, prefix
, name
, cu
);
3318 fputs_unfiltered (prefixed_name
, buf
);
3319 xfree (prefixed_name
);
3322 fputs_unfiltered (name
? name
: "", buf
);
3324 /* For Java and C++ methods, append formal parameter type
3325 information, if PHYSNAME. */
3327 if (physname
&& die
->tag
== DW_TAG_subprogram
3328 && (cu
->language
== language_cplus
3329 || cu
->language
== language_java
))
3331 struct type
*type
= read_type_die (die
, cu
);
3333 c_type_print_args (type
, buf
, 0, cu
->language
);
3335 if (cu
->language
== language_java
)
3337 /* For java, we must append the return type to method
3339 if (die
->tag
== DW_TAG_subprogram
)
3340 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
3343 else if (cu
->language
== language_cplus
)
3345 if (TYPE_NFIELDS (type
) > 0
3346 && TYPE_FIELD_ARTIFICIAL (type
, 0)
3347 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
, 0))))
3348 fputs_unfiltered (" const", buf
);
3352 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
3354 ui_file_delete (buf
);
3356 if (cu
->language
== language_cplus
)
3359 = dwarf2_canonicalize_name (name
, cu
,
3360 &cu
->objfile
->objfile_obstack
);
3366 else if (cu
->language
== language_ada
)
3368 /* For Ada unit, we prefer the linkage name over the name, as
3369 the former contains the exported name, which the user expects
3370 to be able to reference. Ideally, we want the user to be able
3371 to reference this entity using either natural or linkage name,
3372 but we haven't started looking at this enhancement yet. */
3373 struct attribute
*attr
;
3375 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
3376 if (attr
&& DW_STRING (attr
))
3377 name
= DW_STRING (attr
);
3383 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3384 If scope qualifiers are appropriate they will be added. The result
3385 will be allocated on the objfile_obstack, or NULL if the DIE does
3386 not have a name. NAME may either be from a previous call to
3387 dwarf2_name or NULL.
3389 The output string will be canonicalized (if C++/Java). */
3392 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
3394 return dwarf2_compute_name (name
, die
, cu
, 0);
3397 /* Construct a physname for the given DIE in CU. NAME may either be
3398 from a previous call to dwarf2_name or NULL. The result will be
3399 allocated on the objfile_objstack or NULL if the DIE does not have a
3402 The output string will be canonicalized (if C++/Java). */
3405 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
3407 return dwarf2_compute_name (name
, die
, cu
, 1);
3410 /* Read the import statement specified by the given die and record it. */
3413 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
3415 struct attribute
*import_attr
;
3416 struct die_info
*imported_die
;
3417 struct dwarf2_cu
*imported_cu
;
3418 const char *imported_name
;
3419 const char *imported_name_prefix
;
3420 const char *canonical_name
;
3421 const char *import_alias
;
3422 const char *imported_declaration
= NULL
;
3423 const char *import_prefix
;
3427 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
3428 if (import_attr
== NULL
)
3430 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
3431 dwarf_tag_name (die
->tag
));
3436 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
3437 imported_name
= dwarf2_name (imported_die
, imported_cu
);
3438 if (imported_name
== NULL
)
3440 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3442 The import in the following code:
3456 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3457 <52> DW_AT_decl_file : 1
3458 <53> DW_AT_decl_line : 6
3459 <54> DW_AT_import : <0x75>
3460 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3462 <5b> DW_AT_decl_file : 1
3463 <5c> DW_AT_decl_line : 2
3464 <5d> DW_AT_type : <0x6e>
3466 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3467 <76> DW_AT_byte_size : 4
3468 <77> DW_AT_encoding : 5 (signed)
3470 imports the wrong die ( 0x75 instead of 0x58 ).
3471 This case will be ignored until the gcc bug is fixed. */
3475 /* Figure out the local name after import. */
3476 import_alias
= dwarf2_name (die
, cu
);
3478 /* Figure out where the statement is being imported to. */
3479 import_prefix
= determine_prefix (die
, cu
);
3481 /* Figure out what the scope of the imported die is and prepend it
3482 to the name of the imported die. */
3483 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
3485 if (imported_die
->tag
!= DW_TAG_namespace
)
3487 imported_declaration
= imported_name
;
3488 canonical_name
= imported_name_prefix
;
3490 else if (strlen (imported_name_prefix
) > 0)
3492 temp
= alloca (strlen (imported_name_prefix
)
3493 + 2 + strlen (imported_name
) + 1);
3494 strcpy (temp
, imported_name_prefix
);
3495 strcat (temp
, "::");
3496 strcat (temp
, imported_name
);
3497 canonical_name
= temp
;
3500 canonical_name
= imported_name
;
3502 cp_add_using_directive (import_prefix
,
3505 imported_declaration
,
3506 &cu
->objfile
->objfile_obstack
);
3510 initialize_cu_func_list (struct dwarf2_cu
*cu
)
3512 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
3516 free_cu_line_header (void *arg
)
3518 struct dwarf2_cu
*cu
= arg
;
3520 free_line_header (cu
->line_header
);
3521 cu
->line_header
= NULL
;
3525 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3527 struct objfile
*objfile
= cu
->objfile
;
3528 struct comp_unit_head
*cu_header
= &cu
->header
;
3529 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3530 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
3531 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
3532 struct attribute
*attr
;
3534 char *comp_dir
= NULL
;
3535 struct die_info
*child_die
;
3536 bfd
*abfd
= objfile
->obfd
;
3537 struct line_header
*line_header
= 0;
3540 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3542 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
3544 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3545 from finish_block. */
3546 if (lowpc
== ((CORE_ADDR
) -1))
3551 /* Find the filename. Do not use dwarf2_name here, since the filename
3552 is not a source language identifier. */
3553 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3556 name
= DW_STRING (attr
);
3559 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3561 comp_dir
= DW_STRING (attr
);
3562 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3564 comp_dir
= ldirname (name
);
3565 if (comp_dir
!= NULL
)
3566 make_cleanup (xfree
, comp_dir
);
3568 if (comp_dir
!= NULL
)
3570 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3571 directory, get rid of it. */
3572 char *cp
= strchr (comp_dir
, ':');
3574 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
3581 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3584 set_cu_language (DW_UNSND (attr
), cu
);
3587 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3589 cu
->producer
= DW_STRING (attr
);
3591 /* We assume that we're processing GCC output. */
3592 processing_gcc_compilation
= 2;
3594 processing_has_namespace_info
= 0;
3596 start_symtab (name
, comp_dir
, lowpc
);
3597 record_debugformat ("DWARF 2");
3598 record_producer (cu
->producer
);
3600 initialize_cu_func_list (cu
);
3602 /* Decode line number information if present. We do this before
3603 processing child DIEs, so that the line header table is available
3604 for DW_AT_decl_file. */
3605 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3608 unsigned int line_offset
= DW_UNSND (attr
);
3609 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3612 cu
->line_header
= line_header
;
3613 make_cleanup (free_cu_line_header
, cu
);
3614 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
3618 /* Process all dies in compilation unit. */
3619 if (die
->child
!= NULL
)
3621 child_die
= die
->child
;
3622 while (child_die
&& child_die
->tag
)
3624 process_die (child_die
, cu
);
3625 child_die
= sibling_die (child_die
);
3629 /* Decode macro information, if present. Dwarf 2 macro information
3630 refers to information in the line number info statement program
3631 header, so we can only read it if we've read the header
3633 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
3634 if (attr
&& line_header
)
3636 unsigned int macro_offset
= DW_UNSND (attr
);
3637 dwarf_decode_macros (line_header
, macro_offset
,
3638 comp_dir
, abfd
, cu
);
3640 do_cleanups (back_to
);
3643 /* For TUs we want to skip the first top level sibling if it's not the
3644 actual type being defined by this TU. In this case the first top
3645 level sibling is there to provide context only. */
3648 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3650 struct objfile
*objfile
= cu
->objfile
;
3651 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3653 struct attribute
*attr
;
3655 char *comp_dir
= NULL
;
3656 struct die_info
*child_die
;
3657 bfd
*abfd
= objfile
->obfd
;
3658 struct line_header
*line_header
= 0;
3660 /* start_symtab needs a low pc, but we don't really have one.
3661 Do what read_file_scope would do in the absence of such info. */
3662 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3664 /* Find the filename. Do not use dwarf2_name here, since the filename
3665 is not a source language identifier. */
3666 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3668 name
= DW_STRING (attr
);
3670 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3672 comp_dir
= DW_STRING (attr
);
3673 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3675 comp_dir
= ldirname (name
);
3676 if (comp_dir
!= NULL
)
3677 make_cleanup (xfree
, comp_dir
);
3683 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3685 set_cu_language (DW_UNSND (attr
), cu
);
3687 /* This isn't technically needed today. It is done for symmetry
3688 with read_file_scope. */
3689 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3691 cu
->producer
= DW_STRING (attr
);
3693 /* We assume that we're processing GCC output. */
3694 processing_gcc_compilation
= 2;
3696 processing_has_namespace_info
= 0;
3698 start_symtab (name
, comp_dir
, lowpc
);
3699 record_debugformat ("DWARF 2");
3700 record_producer (cu
->producer
);
3702 /* Process the dies in the type unit. */
3703 if (die
->child
== NULL
)
3705 dump_die_for_error (die
);
3706 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3707 bfd_get_filename (abfd
));
3710 child_die
= die
->child
;
3712 while (child_die
&& child_die
->tag
)
3714 process_die (child_die
, cu
);
3716 child_die
= sibling_die (child_die
);
3719 do_cleanups (back_to
);
3723 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
3724 struct dwarf2_cu
*cu
)
3726 struct function_range
*thisfn
;
3728 thisfn
= (struct function_range
*)
3729 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
3730 thisfn
->name
= name
;
3731 thisfn
->lowpc
= lowpc
;
3732 thisfn
->highpc
= highpc
;
3733 thisfn
->seen_line
= 0;
3734 thisfn
->next
= NULL
;
3736 if (cu
->last_fn
== NULL
)
3737 cu
->first_fn
= thisfn
;
3739 cu
->last_fn
->next
= thisfn
;
3741 cu
->last_fn
= thisfn
;
3744 /* qsort helper for inherit_abstract_dies. */
3747 unsigned_int_compar (const void *ap
, const void *bp
)
3749 unsigned int a
= *(unsigned int *) ap
;
3750 unsigned int b
= *(unsigned int *) bp
;
3752 return (a
> b
) - (b
> a
);
3755 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3756 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3757 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3760 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
3762 struct die_info
*child_die
;
3763 unsigned die_children_count
;
3764 /* CU offsets which were referenced by children of the current DIE. */
3766 unsigned *offsets_end
, *offsetp
;
3767 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3768 struct die_info
*origin_die
;
3769 /* Iterator of the ORIGIN_DIE children. */
3770 struct die_info
*origin_child_die
;
3771 struct cleanup
*cleanups
;
3772 struct attribute
*attr
;
3774 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
3778 origin_die
= follow_die_ref (die
, attr
, &cu
);
3779 if (die
->tag
!= origin_die
->tag
3780 && !(die
->tag
== DW_TAG_inlined_subroutine
3781 && origin_die
->tag
== DW_TAG_subprogram
))
3782 complaint (&symfile_complaints
,
3783 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3784 die
->offset
, origin_die
->offset
);
3786 child_die
= die
->child
;
3787 die_children_count
= 0;
3788 while (child_die
&& child_die
->tag
)
3790 child_die
= sibling_die (child_die
);
3791 die_children_count
++;
3793 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
3794 cleanups
= make_cleanup (xfree
, offsets
);
3796 offsets_end
= offsets
;
3797 child_die
= die
->child
;
3798 while (child_die
&& child_die
->tag
)
3800 /* For each CHILD_DIE, find the corresponding child of
3801 ORIGIN_DIE. If there is more than one layer of
3802 DW_AT_abstract_origin, follow them all; there shouldn't be,
3803 but GCC versions at least through 4.4 generate this (GCC PR
3805 struct die_info
*child_origin_die
= child_die
;
3808 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
, cu
);
3811 child_origin_die
= follow_die_ref (child_origin_die
, attr
, &cu
);
3814 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3815 counterpart may exist. */
3816 if (child_origin_die
!= child_die
)
3818 if (child_die
->tag
!= child_origin_die
->tag
3819 && !(child_die
->tag
== DW_TAG_inlined_subroutine
3820 && child_origin_die
->tag
== DW_TAG_subprogram
))
3821 complaint (&symfile_complaints
,
3822 _("Child DIE 0x%x and its abstract origin 0x%x have "
3823 "different tags"), child_die
->offset
,
3824 child_origin_die
->offset
);
3825 if (child_origin_die
->parent
!= origin_die
)
3826 complaint (&symfile_complaints
,
3827 _("Child DIE 0x%x and its abstract origin 0x%x have "
3828 "different parents"), child_die
->offset
,
3829 child_origin_die
->offset
);
3831 *offsets_end
++ = child_origin_die
->offset
;
3833 child_die
= sibling_die (child_die
);
3835 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
3836 unsigned_int_compar
);
3837 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
3838 if (offsetp
[-1] == *offsetp
)
3839 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
3840 "to DIE 0x%x as their abstract origin"),
3841 die
->offset
, *offsetp
);
3844 origin_child_die
= origin_die
->child
;
3845 while (origin_child_die
&& origin_child_die
->tag
)
3847 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3848 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
3850 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
3852 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3853 process_die (origin_child_die
, cu
);
3855 origin_child_die
= sibling_die (origin_child_die
);
3858 do_cleanups (cleanups
);
3862 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3864 struct objfile
*objfile
= cu
->objfile
;
3865 struct context_stack
*new;
3868 struct die_info
*child_die
;
3869 struct attribute
*attr
, *call_line
, *call_file
;
3872 struct block
*block
;
3873 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
3877 /* If we do not have call site information, we can't show the
3878 caller of this inlined function. That's too confusing, so
3879 only use the scope for local variables. */
3880 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
3881 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
3882 if (call_line
== NULL
|| call_file
== NULL
)
3884 read_lexical_block_scope (die
, cu
);
3889 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3891 name
= dwarf2_name (die
, cu
);
3893 /* Ignore functions with missing or empty names. These are actually
3894 illegal according to the DWARF standard. */
3897 complaint (&symfile_complaints
,
3898 _("missing name for subprogram DIE at %d"), die
->offset
);
3902 /* Ignore functions with missing or invalid low and high pc attributes. */
3903 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3905 complaint (&symfile_complaints
,
3906 _("cannot get low and high bounds for subprogram DIE at %d"),
3914 /* Record the function range for dwarf_decode_lines. */
3915 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3917 new = push_context (0, lowpc
);
3918 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
3920 /* If there is a location expression for DW_AT_frame_base, record
3922 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3924 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3925 expression is being recorded directly in the function's symbol
3926 and not in a separate frame-base object. I guess this hack is
3927 to avoid adding some sort of frame-base adjunct/annex to the
3928 function's symbol :-(. The problem with doing this is that it
3929 results in a function symbol with a location expression that
3930 has nothing to do with the location of the function, ouch! The
3931 relationship should be: a function's symbol has-a frame base; a
3932 frame-base has-a location expression. */
3933 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3935 cu
->list_in_scope
= &local_symbols
;
3937 if (die
->child
!= NULL
)
3939 child_die
= die
->child
;
3940 while (child_die
&& child_die
->tag
)
3942 process_die (child_die
, cu
);
3943 child_die
= sibling_die (child_die
);
3947 inherit_abstract_dies (die
, cu
);
3949 /* If we have a DW_AT_specification, we might need to import using
3950 directives from the context of the specification DIE. See the
3951 comment in determine_prefix. */
3952 if (cu
->language
== language_cplus
3953 && dwarf2_attr (die
, DW_AT_specification
, cu
))
3955 struct dwarf2_cu
*spec_cu
= cu
;
3956 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
3960 child_die
= spec_die
->child
;
3961 while (child_die
&& child_die
->tag
)
3963 if (child_die
->tag
== DW_TAG_imported_module
)
3964 process_die (child_die
, spec_cu
);
3965 child_die
= sibling_die (child_die
);
3968 /* In some cases, GCC generates specification DIEs that
3969 themselves contain DW_AT_specification attributes. */
3970 spec_die
= die_specification (spec_die
, &spec_cu
);
3974 new = pop_context ();
3975 /* Make a block for the local symbols within. */
3976 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3977 lowpc
, highpc
, objfile
);
3979 /* For C++, set the block's scope. */
3980 if (cu
->language
== language_cplus
)
3981 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
3982 determine_prefix (die
, cu
),
3983 processing_has_namespace_info
);
3985 /* If we have address ranges, record them. */
3986 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3988 /* In C++, we can have functions nested inside functions (e.g., when
3989 a function declares a class that has methods). This means that
3990 when we finish processing a function scope, we may need to go
3991 back to building a containing block's symbol lists. */
3992 local_symbols
= new->locals
;
3993 param_symbols
= new->params
;
3994 using_directives
= new->using_directives
;
3996 /* If we've finished processing a top-level function, subsequent
3997 symbols go in the file symbol list. */
3998 if (outermost_context_p ())
3999 cu
->list_in_scope
= &file_symbols
;
4002 /* Process all the DIES contained within a lexical block scope. Start
4003 a new scope, process the dies, and then close the scope. */
4006 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4008 struct objfile
*objfile
= cu
->objfile
;
4009 struct context_stack
*new;
4010 CORE_ADDR lowpc
, highpc
;
4011 struct die_info
*child_die
;
4014 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4016 /* Ignore blocks with missing or invalid low and high pc attributes. */
4017 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
4018 as multiple lexical blocks? Handling children in a sane way would
4019 be nasty. Might be easier to properly extend generic blocks to
4021 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
4026 push_context (0, lowpc
);
4027 if (die
->child
!= NULL
)
4029 child_die
= die
->child
;
4030 while (child_die
&& child_die
->tag
)
4032 process_die (child_die
, cu
);
4033 child_die
= sibling_die (child_die
);
4036 new = pop_context ();
4038 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
4041 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
4044 /* Note that recording ranges after traversing children, as we
4045 do here, means that recording a parent's ranges entails
4046 walking across all its children's ranges as they appear in
4047 the address map, which is quadratic behavior.
4049 It would be nicer to record the parent's ranges before
4050 traversing its children, simply overriding whatever you find
4051 there. But since we don't even decide whether to create a
4052 block until after we've traversed its children, that's hard
4054 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
4056 local_symbols
= new->locals
;
4057 using_directives
= new->using_directives
;
4060 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
4061 Return 1 if the attributes are present and valid, otherwise, return 0.
4062 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
4065 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
4066 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
4067 struct partial_symtab
*ranges_pst
)
4069 struct objfile
*objfile
= cu
->objfile
;
4070 struct comp_unit_head
*cu_header
= &cu
->header
;
4071 bfd
*obfd
= objfile
->obfd
;
4072 unsigned int addr_size
= cu_header
->addr_size
;
4073 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4074 /* Base address selection entry. */
4085 found_base
= cu
->base_known
;
4086 base
= cu
->base_address
;
4088 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
4089 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4091 complaint (&symfile_complaints
,
4092 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4096 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4098 /* Read in the largest possible address. */
4099 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
4100 if ((marker
& mask
) == mask
)
4102 /* If we found the largest possible address, then
4103 read the base address. */
4104 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4105 buffer
+= 2 * addr_size
;
4106 offset
+= 2 * addr_size
;
4112 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4116 CORE_ADDR range_beginning
, range_end
;
4118 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
4119 buffer
+= addr_size
;
4120 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
4121 buffer
+= addr_size
;
4122 offset
+= 2 * addr_size
;
4124 /* An end of list marker is a pair of zero addresses. */
4125 if (range_beginning
== 0 && range_end
== 0)
4126 /* Found the end of list entry. */
4129 /* Each base address selection entry is a pair of 2 values.
4130 The first is the largest possible address, the second is
4131 the base address. Check for a base address here. */
4132 if ((range_beginning
& mask
) == mask
)
4134 /* If we found the largest possible address, then
4135 read the base address. */
4136 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4143 /* We have no valid base address for the ranges
4145 complaint (&symfile_complaints
,
4146 _("Invalid .debug_ranges data (no base address)"));
4150 range_beginning
+= base
;
4153 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
4154 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4155 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
4158 /* FIXME: This is recording everything as a low-high
4159 segment of consecutive addresses. We should have a
4160 data structure for discontiguous block ranges
4164 low
= range_beginning
;
4170 if (range_beginning
< low
)
4171 low
= range_beginning
;
4172 if (range_end
> high
)
4178 /* If the first entry is an end-of-list marker, the range
4179 describes an empty scope, i.e. no instructions. */
4185 *high_return
= high
;
4189 /* Get low and high pc attributes from a die. Return 1 if the attributes
4190 are present and valid, otherwise, return 0. Return -1 if the range is
4191 discontinuous, i.e. derived from DW_AT_ranges information. */
4193 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
4194 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
4195 struct partial_symtab
*pst
)
4197 struct attribute
*attr
;
4202 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4205 high
= DW_ADDR (attr
);
4206 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4208 low
= DW_ADDR (attr
);
4210 /* Found high w/o low attribute. */
4213 /* Found consecutive range of addresses. */
4218 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4221 /* Value of the DW_AT_ranges attribute is the offset in the
4222 .debug_ranges section. */
4223 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
4225 /* Found discontinuous range of addresses. */
4233 /* When using the GNU linker, .gnu.linkonce. sections are used to
4234 eliminate duplicate copies of functions and vtables and such.
4235 The linker will arbitrarily choose one and discard the others.
4236 The AT_*_pc values for such functions refer to local labels in
4237 these sections. If the section from that file was discarded, the
4238 labels are not in the output, so the relocs get a value of 0.
4239 If this is a discarded function, mark the pc bounds as invalid,
4240 so that GDB will ignore it. */
4241 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
4249 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4250 its low and high PC addresses. Do nothing if these addresses could not
4251 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4252 and HIGHPC to the high address if greater than HIGHPC. */
4255 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
4256 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4257 struct dwarf2_cu
*cu
)
4259 CORE_ADDR low
, high
;
4260 struct die_info
*child
= die
->child
;
4262 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
4264 *lowpc
= min (*lowpc
, low
);
4265 *highpc
= max (*highpc
, high
);
4268 /* If the language does not allow nested subprograms (either inside
4269 subprograms or lexical blocks), we're done. */
4270 if (cu
->language
!= language_ada
)
4273 /* Check all the children of the given DIE. If it contains nested
4274 subprograms, then check their pc bounds. Likewise, we need to
4275 check lexical blocks as well, as they may also contain subprogram
4277 while (child
&& child
->tag
)
4279 if (child
->tag
== DW_TAG_subprogram
4280 || child
->tag
== DW_TAG_lexical_block
)
4281 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
4282 child
= sibling_die (child
);
4286 /* Get the low and high pc's represented by the scope DIE, and store
4287 them in *LOWPC and *HIGHPC. If the correct values can't be
4288 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4291 get_scope_pc_bounds (struct die_info
*die
,
4292 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4293 struct dwarf2_cu
*cu
)
4295 CORE_ADDR best_low
= (CORE_ADDR
) -1;
4296 CORE_ADDR best_high
= (CORE_ADDR
) 0;
4297 CORE_ADDR current_low
, current_high
;
4299 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
4301 best_low
= current_low
;
4302 best_high
= current_high
;
4306 struct die_info
*child
= die
->child
;
4308 while (child
&& child
->tag
)
4310 switch (child
->tag
) {
4311 case DW_TAG_subprogram
:
4312 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
4314 case DW_TAG_namespace
:
4315 /* FIXME: carlton/2004-01-16: Should we do this for
4316 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4317 that current GCC's always emit the DIEs corresponding
4318 to definitions of methods of classes as children of a
4319 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4320 the DIEs giving the declarations, which could be
4321 anywhere). But I don't see any reason why the
4322 standards says that they have to be there. */
4323 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
4325 if (current_low
!= ((CORE_ADDR
) -1))
4327 best_low
= min (best_low
, current_low
);
4328 best_high
= max (best_high
, current_high
);
4336 child
= sibling_die (child
);
4341 *highpc
= best_high
;
4344 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4347 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
4348 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
4350 struct attribute
*attr
;
4352 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4355 CORE_ADDR high
= DW_ADDR (attr
);
4356 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4359 CORE_ADDR low
= DW_ADDR (attr
);
4360 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
4364 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4367 bfd
*obfd
= cu
->objfile
->obfd
;
4369 /* The value of the DW_AT_ranges attribute is the offset of the
4370 address range list in the .debug_ranges section. */
4371 unsigned long offset
= DW_UNSND (attr
);
4372 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4374 /* For some target architectures, but not others, the
4375 read_address function sign-extends the addresses it returns.
4376 To recognize base address selection entries, we need a
4378 unsigned int addr_size
= cu
->header
.addr_size
;
4379 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4381 /* The base address, to which the next pair is relative. Note
4382 that this 'base' is a DWARF concept: most entries in a range
4383 list are relative, to reduce the number of relocs against the
4384 debugging information. This is separate from this function's
4385 'baseaddr' argument, which GDB uses to relocate debugging
4386 information from a shared library based on the address at
4387 which the library was loaded. */
4388 CORE_ADDR base
= cu
->base_address
;
4389 int base_known
= cu
->base_known
;
4391 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
4392 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4394 complaint (&symfile_complaints
,
4395 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4402 unsigned int bytes_read
;
4403 CORE_ADDR start
, end
;
4405 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4406 buffer
+= bytes_read
;
4407 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4408 buffer
+= bytes_read
;
4410 /* Did we find the end of the range list? */
4411 if (start
== 0 && end
== 0)
4414 /* Did we find a base address selection entry? */
4415 else if ((start
& base_select_mask
) == base_select_mask
)
4421 /* We found an ordinary address range. */
4426 complaint (&symfile_complaints
,
4427 _("Invalid .debug_ranges data (no base address)"));
4431 record_block_range (block
,
4432 baseaddr
+ base
+ start
,
4433 baseaddr
+ base
+ end
- 1);
4439 /* Add an aggregate field to the field list. */
4442 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
4443 struct dwarf2_cu
*cu
)
4445 struct objfile
*objfile
= cu
->objfile
;
4446 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4447 struct nextfield
*new_field
;
4448 struct attribute
*attr
;
4450 char *fieldname
= "";
4452 /* Allocate a new field list entry and link it in. */
4453 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
4454 make_cleanup (xfree
, new_field
);
4455 memset (new_field
, 0, sizeof (struct nextfield
));
4457 if (die
->tag
== DW_TAG_inheritance
)
4459 new_field
->next
= fip
->baseclasses
;
4460 fip
->baseclasses
= new_field
;
4464 new_field
->next
= fip
->fields
;
4465 fip
->fields
= new_field
;
4469 /* Handle accessibility and virtuality of field.
4470 The default accessibility for members is public, the default
4471 accessibility for inheritance is private. */
4472 if (die
->tag
!= DW_TAG_inheritance
)
4473 new_field
->accessibility
= DW_ACCESS_public
;
4475 new_field
->accessibility
= DW_ACCESS_private
;
4476 new_field
->virtuality
= DW_VIRTUALITY_none
;
4478 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4480 new_field
->accessibility
= DW_UNSND (attr
);
4481 if (new_field
->accessibility
!= DW_ACCESS_public
)
4482 fip
->non_public_fields
= 1;
4483 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4485 new_field
->virtuality
= DW_UNSND (attr
);
4487 fp
= &new_field
->field
;
4489 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
4491 /* Data member other than a C++ static data member. */
4493 /* Get type of field. */
4494 fp
->type
= die_type (die
, cu
);
4496 SET_FIELD_BITPOS (*fp
, 0);
4498 /* Get bit size of field (zero if none). */
4499 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
4502 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
4506 FIELD_BITSIZE (*fp
) = 0;
4509 /* Get bit offset of field. */
4510 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4513 int byte_offset
= 0;
4515 if (attr_form_is_section_offset (attr
))
4516 dwarf2_complex_location_expr_complaint ();
4517 else if (attr_form_is_constant (attr
))
4518 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4519 else if (attr_form_is_block (attr
))
4520 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4522 dwarf2_complex_location_expr_complaint ();
4524 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4526 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
4529 if (gdbarch_bits_big_endian (gdbarch
))
4531 /* For big endian bits, the DW_AT_bit_offset gives the
4532 additional bit offset from the MSB of the containing
4533 anonymous object to the MSB of the field. We don't
4534 have to do anything special since we don't need to
4535 know the size of the anonymous object. */
4536 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
4540 /* For little endian bits, compute the bit offset to the
4541 MSB of the anonymous object, subtract off the number of
4542 bits from the MSB of the field to the MSB of the
4543 object, and then subtract off the number of bits of
4544 the field itself. The result is the bit offset of
4545 the LSB of the field. */
4547 int bit_offset
= DW_UNSND (attr
);
4549 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4552 /* The size of the anonymous object containing
4553 the bit field is explicit, so use the
4554 indicated size (in bytes). */
4555 anonymous_size
= DW_UNSND (attr
);
4559 /* The size of the anonymous object containing
4560 the bit field must be inferred from the type
4561 attribute of the data member containing the
4563 anonymous_size
= TYPE_LENGTH (fp
->type
);
4565 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
4566 - bit_offset
- FIELD_BITSIZE (*fp
);
4570 /* Get name of field. */
4571 fieldname
= dwarf2_name (die
, cu
);
4572 if (fieldname
== NULL
)
4575 /* The name is already allocated along with this objfile, so we don't
4576 need to duplicate it for the type. */
4577 fp
->name
= fieldname
;
4579 /* Change accessibility for artificial fields (e.g. virtual table
4580 pointer or virtual base class pointer) to private. */
4581 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
4583 FIELD_ARTIFICIAL (*fp
) = 1;
4584 new_field
->accessibility
= DW_ACCESS_private
;
4585 fip
->non_public_fields
= 1;
4588 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4590 /* C++ static member. */
4592 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4593 is a declaration, but all versions of G++ as of this writing
4594 (so through at least 3.2.1) incorrectly generate
4595 DW_TAG_variable tags. */
4599 /* Get name of field. */
4600 fieldname
= dwarf2_name (die
, cu
);
4601 if (fieldname
== NULL
)
4604 /* Get physical name. */
4605 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
4607 /* The name is already allocated along with this objfile, so we don't
4608 need to duplicate it for the type. */
4609 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4610 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4611 FIELD_NAME (*fp
) = fieldname
;
4613 else if (die
->tag
== DW_TAG_inheritance
)
4615 /* C++ base class field. */
4616 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4619 int byte_offset
= 0;
4621 if (attr_form_is_section_offset (attr
))
4622 dwarf2_complex_location_expr_complaint ();
4623 else if (attr_form_is_constant (attr
))
4624 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4625 else if (attr_form_is_block (attr
))
4626 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4628 dwarf2_complex_location_expr_complaint ();
4630 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4632 FIELD_BITSIZE (*fp
) = 0;
4633 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4634 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4635 fip
->nbaseclasses
++;
4639 /* Create the vector of fields, and attach it to the type. */
4642 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4643 struct dwarf2_cu
*cu
)
4645 int nfields
= fip
->nfields
;
4647 /* Record the field count, allocate space for the array of fields,
4648 and create blank accessibility bitfields if necessary. */
4649 TYPE_NFIELDS (type
) = nfields
;
4650 TYPE_FIELDS (type
) = (struct field
*)
4651 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4652 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4654 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
4656 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4658 TYPE_FIELD_PRIVATE_BITS (type
) =
4659 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4660 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4662 TYPE_FIELD_PROTECTED_BITS (type
) =
4663 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4664 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4666 TYPE_FIELD_IGNORE_BITS (type
) =
4667 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4668 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4671 /* If the type has baseclasses, allocate and clear a bit vector for
4672 TYPE_FIELD_VIRTUAL_BITS. */
4673 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
4675 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4676 unsigned char *pointer
;
4678 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4679 pointer
= TYPE_ALLOC (type
, num_bytes
);
4680 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4681 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4682 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4685 /* Copy the saved-up fields into the field vector. Start from the head
4686 of the list, adding to the tail of the field array, so that they end
4687 up in the same order in the array in which they were added to the list. */
4688 while (nfields
-- > 0)
4690 struct nextfield
*fieldp
;
4694 fieldp
= fip
->fields
;
4695 fip
->fields
= fieldp
->next
;
4699 fieldp
= fip
->baseclasses
;
4700 fip
->baseclasses
= fieldp
->next
;
4703 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
4704 switch (fieldp
->accessibility
)
4706 case DW_ACCESS_private
:
4707 if (cu
->language
!= language_ada
)
4708 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4711 case DW_ACCESS_protected
:
4712 if (cu
->language
!= language_ada
)
4713 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4716 case DW_ACCESS_public
:
4720 /* Unknown accessibility. Complain and treat it as public. */
4722 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4723 fieldp
->accessibility
);
4727 if (nfields
< fip
->nbaseclasses
)
4729 switch (fieldp
->virtuality
)
4731 case DW_VIRTUALITY_virtual
:
4732 case DW_VIRTUALITY_pure_virtual
:
4733 if (cu
->language
== language_ada
)
4734 error ("unexpected virtuality in component of Ada type");
4735 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4742 /* Add a member function to the proper fieldlist. */
4745 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4746 struct type
*type
, struct dwarf2_cu
*cu
)
4748 struct objfile
*objfile
= cu
->objfile
;
4749 struct attribute
*attr
;
4750 struct fnfieldlist
*flp
;
4752 struct fn_field
*fnp
;
4755 struct nextfnfield
*new_fnfield
;
4756 struct type
*this_type
;
4758 if (cu
->language
== language_ada
)
4759 error ("unexpected member function in Ada type");
4761 /* Get name of member function. */
4762 fieldname
= dwarf2_name (die
, cu
);
4763 if (fieldname
== NULL
)
4766 /* Get the mangled name. */
4767 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
4769 /* Look up member function name in fieldlist. */
4770 for (i
= 0; i
< fip
->nfnfields
; i
++)
4772 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4776 /* Create new list element if necessary. */
4777 if (i
< fip
->nfnfields
)
4778 flp
= &fip
->fnfieldlists
[i
];
4781 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4783 fip
->fnfieldlists
= (struct fnfieldlist
*)
4784 xrealloc (fip
->fnfieldlists
,
4785 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4786 * sizeof (struct fnfieldlist
));
4787 if (fip
->nfnfields
== 0)
4788 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4790 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4791 flp
->name
= fieldname
;
4797 /* Create a new member function field and chain it to the field list
4799 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4800 make_cleanup (xfree
, new_fnfield
);
4801 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4802 new_fnfield
->next
= flp
->head
;
4803 flp
->head
= new_fnfield
;
4806 /* Fill in the member function field info. */
4807 fnp
= &new_fnfield
->fnfield
;
4808 /* The name is already allocated along with this objfile, so we don't
4809 need to duplicate it for the type. */
4810 fnp
->physname
= physname
? physname
: "";
4811 fnp
->type
= alloc_type (objfile
);
4812 this_type
= read_type_die (die
, cu
);
4813 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4815 int nparams
= TYPE_NFIELDS (this_type
);
4817 /* TYPE is the domain of this method, and THIS_TYPE is the type
4818 of the method itself (TYPE_CODE_METHOD). */
4819 smash_to_method_type (fnp
->type
, type
,
4820 TYPE_TARGET_TYPE (this_type
),
4821 TYPE_FIELDS (this_type
),
4822 TYPE_NFIELDS (this_type
),
4823 TYPE_VARARGS (this_type
));
4825 /* Handle static member functions.
4826 Dwarf2 has no clean way to discern C++ static and non-static
4827 member functions. G++ helps GDB by marking the first
4828 parameter for non-static member functions (which is the
4829 this pointer) as artificial. We obtain this information
4830 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4831 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4832 fnp
->voffset
= VOFFSET_STATIC
;
4835 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4838 /* Get fcontext from DW_AT_containing_type if present. */
4839 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4840 fnp
->fcontext
= die_containing_type (die
, cu
);
4842 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4843 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4845 /* Get accessibility. */
4846 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4849 switch (DW_UNSND (attr
))
4851 case DW_ACCESS_private
:
4852 fnp
->is_private
= 1;
4854 case DW_ACCESS_protected
:
4855 fnp
->is_protected
= 1;
4860 /* Check for artificial methods. */
4861 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4862 if (attr
&& DW_UNSND (attr
) != 0)
4863 fnp
->is_artificial
= 1;
4865 /* Get index in virtual function table if it is a virtual member
4866 function. For GCC, this is an offset in the appropriate
4867 virtual table, as specified by DW_AT_containing_type. For
4868 everyone else, it is an expression to be evaluated relative
4869 to the object address. */
4871 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4872 if (attr
&& fnp
->fcontext
)
4874 /* Support the .debug_loc offsets */
4875 if (attr_form_is_block (attr
))
4877 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4879 else if (attr_form_is_section_offset (attr
))
4881 dwarf2_complex_location_expr_complaint ();
4885 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4891 /* We only support trivial expressions here. This hack will work
4892 for v3 classes, which always start with the vtable pointer. */
4893 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0
4894 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref
)
4896 struct dwarf_block blk
;
4897 blk
.size
= DW_BLOCK (attr
)->size
- 1;
4898 blk
.data
= DW_BLOCK (attr
)->data
+ 1;
4899 fnp
->voffset
= decode_locdesc (&blk
, cu
);
4900 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
4901 dwarf2_complex_location_expr_complaint ();
4903 fnp
->voffset
/= cu
->header
.addr_size
;
4905 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
4908 dwarf2_complex_location_expr_complaint ();
4912 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4913 if (attr
&& DW_UNSND (attr
))
4915 /* GCC does this, as of 2008-08-25; PR debug/37237. */
4916 complaint (&symfile_complaints
,
4917 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
4918 fieldname
, die
->offset
);
4919 TYPE_CPLUS_DYNAMIC (type
) = 1;
4924 /* Create the vector of member function fields, and attach it to the type. */
4927 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
4928 struct dwarf2_cu
*cu
)
4930 struct fnfieldlist
*flp
;
4931 int total_length
= 0;
4934 if (cu
->language
== language_ada
)
4935 error ("unexpected member functions in Ada type");
4937 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4938 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
4939 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
4941 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
4943 struct nextfnfield
*nfp
= flp
->head
;
4944 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
4947 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
4948 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
4949 fn_flp
->fn_fields
= (struct fn_field
*)
4950 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
4951 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
4952 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
4954 total_length
+= flp
->length
;
4957 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
4958 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
4961 /* Returns non-zero if NAME is the name of a vtable member in CU's
4962 language, zero otherwise. */
4964 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
4966 static const char vptr
[] = "_vptr";
4967 static const char vtable
[] = "vtable";
4969 /* Look for the C++ and Java forms of the vtable. */
4970 if ((cu
->language
== language_java
4971 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
4972 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
4973 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
4979 /* GCC outputs unnamed structures that are really pointers to member
4980 functions, with the ABI-specified layout. If TYPE describes
4981 such a structure, smash it into a member function type.
4983 GCC shouldn't do this; it should just output pointer to member DIEs.
4984 This is GCC PR debug/28767. */
4987 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
4989 struct type
*pfn_type
, *domain_type
, *new_type
;
4991 /* Check for a structure with no name and two children. */
4992 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
4995 /* Check for __pfn and __delta members. */
4996 if (TYPE_FIELD_NAME (type
, 0) == NULL
4997 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
4998 || TYPE_FIELD_NAME (type
, 1) == NULL
4999 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
5002 /* Find the type of the method. */
5003 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
5004 if (pfn_type
== NULL
5005 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
5006 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
5009 /* Look for the "this" argument. */
5010 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
5011 if (TYPE_NFIELDS (pfn_type
) == 0
5012 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
5013 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
5016 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
5017 new_type
= alloc_type (objfile
);
5018 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
5019 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
5020 TYPE_VARARGS (pfn_type
));
5021 smash_to_methodptr_type (type
, new_type
);
5024 /* Called when we find the DIE that starts a structure or union scope
5025 (definition) to process all dies that define the members of the
5028 NOTE: we need to call struct_type regardless of whether or not the
5029 DIE has an at_name attribute, since it might be an anonymous
5030 structure or union. This gets the type entered into our set of
5033 However, if the structure is incomplete (an opaque struct/union)
5034 then suppress creating a symbol table entry for it since gdb only
5035 wants to find the one with the complete definition. Note that if
5036 it is complete, we just call new_symbol, which does it's own
5037 checking about whether the struct/union is anonymous or not (and
5038 suppresses creating a symbol table entry itself). */
5040 static struct type
*
5041 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5043 struct objfile
*objfile
= cu
->objfile
;
5045 struct attribute
*attr
;
5047 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5049 /* If the definition of this type lives in .debug_types, read that type.
5050 Don't follow DW_AT_specification though, that will take us back up
5051 the chain and we want to go down. */
5052 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5055 struct dwarf2_cu
*type_cu
= cu
;
5056 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5057 /* We could just recurse on read_structure_type, but we need to call
5058 get_die_type to ensure only one type for this DIE is created.
5059 This is important, for example, because for c++ classes we need
5060 TYPE_NAME set which is only done by new_symbol. Blech. */
5061 type
= read_type_die (type_die
, type_cu
);
5062 return set_die_type (die
, type
, cu
);
5065 type
= alloc_type (objfile
);
5066 INIT_CPLUS_SPECIFIC (type
);
5068 name
= dwarf2_name (die
, cu
);
5071 if (cu
->language
== language_cplus
5072 || cu
->language
== language_java
)
5074 TYPE_TAG_NAME (type
) = (char *) dwarf2_full_name (name
, die
, cu
);
5075 if (die
->tag
== DW_TAG_structure_type
5076 || die
->tag
== DW_TAG_class_type
)
5077 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
5081 /* The name is already allocated along with this objfile, so
5082 we don't need to duplicate it for the type. */
5083 TYPE_TAG_NAME (type
) = (char *) name
;
5084 if (die
->tag
== DW_TAG_class_type
)
5085 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
5089 if (die
->tag
== DW_TAG_structure_type
)
5091 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
5093 else if (die
->tag
== DW_TAG_union_type
)
5095 TYPE_CODE (type
) = TYPE_CODE_UNION
;
5099 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
5102 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
5103 TYPE_DECLARED_CLASS (type
) = 1;
5105 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5108 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5112 TYPE_LENGTH (type
) = 0;
5115 TYPE_STUB_SUPPORTED (type
) = 1;
5116 if (die_is_declaration (die
, cu
))
5117 TYPE_STUB (type
) = 1;
5118 else if (attr
== NULL
&& die
->child
== NULL
5119 && producer_is_realview (cu
->producer
))
5120 /* RealView does not output the required DW_AT_declaration
5121 on incomplete types. */
5122 TYPE_STUB (type
) = 1;
5124 set_descriptive_type (type
, die
, cu
);
5126 /* We need to add the type field to the die immediately so we don't
5127 infinitely recurse when dealing with pointers to the structure
5128 type within the structure itself. */
5129 set_die_type (die
, type
, cu
);
5131 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
5133 struct field_info fi
;
5134 struct die_info
*child_die
;
5136 memset (&fi
, 0, sizeof (struct field_info
));
5138 child_die
= die
->child
;
5140 while (child_die
&& child_die
->tag
)
5142 if (child_die
->tag
== DW_TAG_member
5143 || child_die
->tag
== DW_TAG_variable
)
5145 /* NOTE: carlton/2002-11-05: A C++ static data member
5146 should be a DW_TAG_member that is a declaration, but
5147 all versions of G++ as of this writing (so through at
5148 least 3.2.1) incorrectly generate DW_TAG_variable
5149 tags for them instead. */
5150 dwarf2_add_field (&fi
, child_die
, cu
);
5152 else if (child_die
->tag
== DW_TAG_subprogram
)
5154 /* C++ member function. */
5155 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
5157 else if (child_die
->tag
== DW_TAG_inheritance
)
5159 /* C++ base class field. */
5160 dwarf2_add_field (&fi
, child_die
, cu
);
5162 child_die
= sibling_die (child_die
);
5165 /* Attach fields and member functions to the type. */
5167 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
5170 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
5172 /* Get the type which refers to the base class (possibly this
5173 class itself) which contains the vtable pointer for the current
5174 class from the DW_AT_containing_type attribute. This use of
5175 DW_AT_containing_type is a GNU extension. */
5177 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
5179 struct type
*t
= die_containing_type (die
, cu
);
5181 TYPE_VPTR_BASETYPE (type
) = t
;
5186 /* Our own class provides vtbl ptr. */
5187 for (i
= TYPE_NFIELDS (t
) - 1;
5188 i
>= TYPE_N_BASECLASSES (t
);
5191 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
5193 if (is_vtable_name (fieldname
, cu
))
5195 TYPE_VPTR_FIELDNO (type
) = i
;
5200 /* Complain if virtual function table field not found. */
5201 if (i
< TYPE_N_BASECLASSES (t
))
5202 complaint (&symfile_complaints
,
5203 _("virtual function table pointer not found when defining class '%s'"),
5204 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
5209 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
5212 else if (cu
->producer
5213 && strncmp (cu
->producer
,
5214 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5216 /* The IBM XLC compiler does not provide direct indication
5217 of the containing type, but the vtable pointer is
5218 always named __vfp. */
5222 for (i
= TYPE_NFIELDS (type
) - 1;
5223 i
>= TYPE_N_BASECLASSES (type
);
5226 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
5228 TYPE_VPTR_FIELDNO (type
) = i
;
5229 TYPE_VPTR_BASETYPE (type
) = type
;
5237 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
5239 do_cleanups (back_to
);
5244 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5246 struct objfile
*objfile
= cu
->objfile
;
5247 struct die_info
*child_die
= die
->child
;
5248 struct type
*this_type
;
5250 this_type
= get_die_type (die
, cu
);
5251 if (this_type
== NULL
)
5252 this_type
= read_structure_type (die
, cu
);
5254 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5255 snapshots) has been known to create a die giving a declaration
5256 for a class that has, as a child, a die giving a definition for a
5257 nested class. So we have to process our children even if the
5258 current die is a declaration. Normally, of course, a declaration
5259 won't have any children at all. */
5261 while (child_die
!= NULL
&& child_die
->tag
)
5263 if (child_die
->tag
== DW_TAG_member
5264 || child_die
->tag
== DW_TAG_variable
5265 || child_die
->tag
== DW_TAG_inheritance
)
5270 process_die (child_die
, cu
);
5272 child_die
= sibling_die (child_die
);
5275 /* Do not consider external references. According to the DWARF standard,
5276 these DIEs are identified by the fact that they have no byte_size
5277 attribute, and a declaration attribute. */
5278 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
5279 || !die_is_declaration (die
, cu
))
5280 new_symbol (die
, this_type
, cu
);
5283 /* Given a DW_AT_enumeration_type die, set its type. We do not
5284 complete the type's fields yet, or create any symbols. */
5286 static struct type
*
5287 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5289 struct objfile
*objfile
= cu
->objfile
;
5291 struct attribute
*attr
;
5294 /* If the definition of this type lives in .debug_types, read that type.
5295 Don't follow DW_AT_specification though, that will take us back up
5296 the chain and we want to go down. */
5297 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5300 struct dwarf2_cu
*type_cu
= cu
;
5301 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5302 type
= read_type_die (type_die
, type_cu
);
5303 return set_die_type (die
, type
, cu
);
5306 type
= alloc_type (objfile
);
5308 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
5309 name
= dwarf2_full_name (NULL
, die
, cu
);
5311 TYPE_TAG_NAME (type
) = (char *) name
;
5313 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5316 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5320 TYPE_LENGTH (type
) = 0;
5323 /* The enumeration DIE can be incomplete. In Ada, any type can be
5324 declared as private in the package spec, and then defined only
5325 inside the package body. Such types are known as Taft Amendment
5326 Types. When another package uses such a type, an incomplete DIE
5327 may be generated by the compiler. */
5328 if (die_is_declaration (die
, cu
))
5329 TYPE_STUB (type
) = 1;
5331 return set_die_type (die
, type
, cu
);
5334 /* Given a pointer to a die which begins an enumeration, process all
5335 the dies that define the members of the enumeration, and create the
5336 symbol for the enumeration type.
5338 NOTE: We reverse the order of the element list. */
5341 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5343 struct objfile
*objfile
= cu
->objfile
;
5344 struct die_info
*child_die
;
5345 struct field
*fields
;
5348 int unsigned_enum
= 1;
5350 struct type
*this_type
;
5354 this_type
= get_die_type (die
, cu
);
5355 if (this_type
== NULL
)
5356 this_type
= read_enumeration_type (die
, cu
);
5357 if (die
->child
!= NULL
)
5359 child_die
= die
->child
;
5360 while (child_die
&& child_die
->tag
)
5362 if (child_die
->tag
!= DW_TAG_enumerator
)
5364 process_die (child_die
, cu
);
5368 name
= dwarf2_name (child_die
, cu
);
5371 sym
= new_symbol (child_die
, this_type
, cu
);
5372 if (SYMBOL_VALUE (sym
) < 0)
5375 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
5377 fields
= (struct field
*)
5379 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
5380 * sizeof (struct field
));
5383 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
5384 FIELD_TYPE (fields
[num_fields
]) = NULL
;
5385 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
5386 FIELD_BITSIZE (fields
[num_fields
]) = 0;
5392 child_die
= sibling_die (child_die
);
5397 TYPE_NFIELDS (this_type
) = num_fields
;
5398 TYPE_FIELDS (this_type
) = (struct field
*)
5399 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
5400 memcpy (TYPE_FIELDS (this_type
), fields
,
5401 sizeof (struct field
) * num_fields
);
5405 TYPE_UNSIGNED (this_type
) = 1;
5408 new_symbol (die
, this_type
, cu
);
5411 /* Extract all information from a DW_TAG_array_type DIE and put it in
5412 the DIE's type field. For now, this only handles one dimensional
5415 static struct type
*
5416 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5418 struct objfile
*objfile
= cu
->objfile
;
5419 struct die_info
*child_die
;
5420 struct type
*type
= NULL
;
5421 struct type
*element_type
, *range_type
, *index_type
;
5422 struct type
**range_types
= NULL
;
5423 struct attribute
*attr
;
5425 struct cleanup
*back_to
;
5428 element_type
= die_type (die
, cu
);
5430 /* Irix 6.2 native cc creates array types without children for
5431 arrays with unspecified length. */
5432 if (die
->child
== NULL
)
5434 index_type
= objfile_type (objfile
)->builtin_int
;
5435 range_type
= create_range_type (NULL
, index_type
, 0, -1);
5436 type
= create_array_type (NULL
, element_type
, range_type
);
5437 return set_die_type (die
, type
, cu
);
5440 back_to
= make_cleanup (null_cleanup
, NULL
);
5441 child_die
= die
->child
;
5442 while (child_die
&& child_die
->tag
)
5444 if (child_die
->tag
== DW_TAG_subrange_type
)
5446 struct type
*child_type
= read_type_die (child_die
, cu
);
5447 if (child_type
!= NULL
)
5449 /* The range type was succesfully read. Save it for
5450 the array type creation. */
5451 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
5453 range_types
= (struct type
**)
5454 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
5455 * sizeof (struct type
*));
5457 make_cleanup (free_current_contents
, &range_types
);
5459 range_types
[ndim
++] = child_type
;
5462 child_die
= sibling_die (child_die
);
5465 /* Dwarf2 dimensions are output from left to right, create the
5466 necessary array types in backwards order. */
5468 type
= element_type
;
5470 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
5474 type
= create_array_type (NULL
, type
, range_types
[i
++]);
5479 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
5482 /* Understand Dwarf2 support for vector types (like they occur on
5483 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5484 array type. This is not part of the Dwarf2/3 standard yet, but a
5485 custom vendor extension. The main difference between a regular
5486 array and the vector variant is that vectors are passed by value
5488 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
5490 make_vector_type (type
);
5492 name
= dwarf2_name (die
, cu
);
5494 TYPE_NAME (type
) = name
;
5496 set_descriptive_type (type
, die
, cu
);
5498 do_cleanups (back_to
);
5500 /* Install the type in the die. */
5501 return set_die_type (die
, type
, cu
);
5504 static enum dwarf_array_dim_ordering
5505 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
5507 struct attribute
*attr
;
5509 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
5511 if (attr
) return DW_SND (attr
);
5514 GNU F77 is a special case, as at 08/2004 array type info is the
5515 opposite order to the dwarf2 specification, but data is still
5516 laid out as per normal fortran.
5518 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5522 if (cu
->language
== language_fortran
5523 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
5525 return DW_ORD_row_major
;
5528 switch (cu
->language_defn
->la_array_ordering
)
5530 case array_column_major
:
5531 return DW_ORD_col_major
;
5532 case array_row_major
:
5534 return DW_ORD_row_major
;
5538 /* Extract all information from a DW_TAG_set_type DIE and put it in
5539 the DIE's type field. */
5541 static struct type
*
5542 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5544 struct type
*set_type
= create_set_type (NULL
, die_type (die
, cu
));
5546 return set_die_type (die
, set_type
, cu
);
5549 /* First cut: install each common block member as a global variable. */
5552 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
5554 struct die_info
*child_die
;
5555 struct attribute
*attr
;
5557 CORE_ADDR base
= (CORE_ADDR
) 0;
5559 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
5562 /* Support the .debug_loc offsets */
5563 if (attr_form_is_block (attr
))
5565 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5567 else if (attr_form_is_section_offset (attr
))
5569 dwarf2_complex_location_expr_complaint ();
5573 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5574 "common block member");
5577 if (die
->child
!= NULL
)
5579 child_die
= die
->child
;
5580 while (child_die
&& child_die
->tag
)
5582 sym
= new_symbol (child_die
, NULL
, cu
);
5583 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5586 CORE_ADDR byte_offset
= 0;
5588 if (attr_form_is_section_offset (attr
))
5589 dwarf2_complex_location_expr_complaint ();
5590 else if (attr_form_is_constant (attr
))
5591 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
5592 else if (attr_form_is_block (attr
))
5593 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
5595 dwarf2_complex_location_expr_complaint ();
5597 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
5598 add_symbol_to_list (sym
, &global_symbols
);
5600 child_die
= sibling_die (child_die
);
5605 /* Create a type for a C++ namespace. */
5607 static struct type
*
5608 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5610 struct objfile
*objfile
= cu
->objfile
;
5611 const char *previous_prefix
, *name
;
5615 /* For extensions, reuse the type of the original namespace. */
5616 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5618 struct die_info
*ext_die
;
5619 struct dwarf2_cu
*ext_cu
= cu
;
5620 ext_die
= dwarf2_extension (die
, &ext_cu
);
5621 type
= read_type_die (ext_die
, ext_cu
);
5622 return set_die_type (die
, type
, cu
);
5625 name
= namespace_name (die
, &is_anonymous
, cu
);
5627 /* Now build the name of the current namespace. */
5629 previous_prefix
= determine_prefix (die
, cu
);
5630 if (previous_prefix
[0] != '\0')
5631 name
= typename_concat (&objfile
->objfile_obstack
,
5632 previous_prefix
, name
, cu
);
5634 /* Create the type. */
5635 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5637 TYPE_NAME (type
) = (char *) name
;
5638 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5640 return set_die_type (die
, type
, cu
);
5643 /* Read a C++ namespace. */
5646 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5648 struct objfile
*objfile
= cu
->objfile
;
5652 /* Add a symbol associated to this if we haven't seen the namespace
5653 before. Also, add a using directive if it's an anonymous
5656 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5660 type
= read_type_die (die
, cu
);
5661 new_symbol (die
, type
, cu
);
5663 name
= namespace_name (die
, &is_anonymous
, cu
);
5666 const char *previous_prefix
= determine_prefix (die
, cu
);
5667 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
5668 NULL
, &objfile
->objfile_obstack
);
5672 if (die
->child
!= NULL
)
5674 struct die_info
*child_die
= die
->child
;
5676 while (child_die
&& child_die
->tag
)
5678 process_die (child_die
, cu
);
5679 child_die
= sibling_die (child_die
);
5684 /* Read a Fortran module. */
5687 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5689 struct die_info
*child_die
= die
->child
;
5691 /* FIXME: Support the separate Fortran module namespaces. */
5693 while (child_die
&& child_die
->tag
)
5695 process_die (child_die
, cu
);
5696 child_die
= sibling_die (child_die
);
5700 /* Return the name of the namespace represented by DIE. Set
5701 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5705 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5707 struct die_info
*current_die
;
5708 const char *name
= NULL
;
5710 /* Loop through the extensions until we find a name. */
5712 for (current_die
= die
;
5713 current_die
!= NULL
;
5714 current_die
= dwarf2_extension (die
, &cu
))
5716 name
= dwarf2_name (current_die
, cu
);
5721 /* Is it an anonymous namespace? */
5723 *is_anonymous
= (name
== NULL
);
5725 name
= "(anonymous namespace)";
5730 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5731 the user defined type vector. */
5733 static struct type
*
5734 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5736 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5737 struct comp_unit_head
*cu_header
= &cu
->header
;
5739 struct attribute
*attr_byte_size
;
5740 struct attribute
*attr_address_class
;
5741 int byte_size
, addr_class
;
5743 type
= lookup_pointer_type (die_type (die
, cu
));
5745 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5747 byte_size
= DW_UNSND (attr_byte_size
);
5749 byte_size
= cu_header
->addr_size
;
5751 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5752 if (attr_address_class
)
5753 addr_class
= DW_UNSND (attr_address_class
);
5755 addr_class
= DW_ADDR_none
;
5757 /* If the pointer size or address class is different than the
5758 default, create a type variant marked as such and set the
5759 length accordingly. */
5760 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5762 if (gdbarch_address_class_type_flags_p (gdbarch
))
5766 type_flags
= gdbarch_address_class_type_flags
5767 (gdbarch
, byte_size
, addr_class
);
5768 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5770 type
= make_type_with_address_space (type
, type_flags
);
5772 else if (TYPE_LENGTH (type
) != byte_size
)
5774 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5777 /* Should we also complain about unhandled address classes? */
5781 TYPE_LENGTH (type
) = byte_size
;
5782 return set_die_type (die
, type
, cu
);
5785 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5786 the user defined type vector. */
5788 static struct type
*
5789 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5791 struct objfile
*objfile
= cu
->objfile
;
5793 struct type
*to_type
;
5794 struct type
*domain
;
5796 to_type
= die_type (die
, cu
);
5797 domain
= die_containing_type (die
, cu
);
5799 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5800 type
= lookup_methodptr_type (to_type
);
5802 type
= lookup_memberptr_type (to_type
, domain
);
5804 return set_die_type (die
, type
, cu
);
5807 /* Extract all information from a DW_TAG_reference_type DIE and add to
5808 the user defined type vector. */
5810 static struct type
*
5811 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5813 struct comp_unit_head
*cu_header
= &cu
->header
;
5815 struct attribute
*attr
;
5817 type
= lookup_reference_type (die_type (die
, cu
));
5818 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5821 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5825 TYPE_LENGTH (type
) = cu_header
->addr_size
;
5827 return set_die_type (die
, type
, cu
);
5830 static struct type
*
5831 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5833 struct type
*base_type
, *cv_type
;
5835 base_type
= die_type (die
, cu
);
5836 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
5837 return set_die_type (die
, cv_type
, cu
);
5840 static struct type
*
5841 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5843 struct type
*base_type
, *cv_type
;
5845 base_type
= die_type (die
, cu
);
5846 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
5847 return set_die_type (die
, cv_type
, cu
);
5850 /* Extract all information from a DW_TAG_string_type DIE and add to
5851 the user defined type vector. It isn't really a user defined type,
5852 but it behaves like one, with other DIE's using an AT_user_def_type
5853 attribute to reference it. */
5855 static struct type
*
5856 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5858 struct objfile
*objfile
= cu
->objfile
;
5859 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5860 struct type
*type
, *range_type
, *index_type
, *char_type
;
5861 struct attribute
*attr
;
5862 unsigned int length
;
5864 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
5867 length
= DW_UNSND (attr
);
5871 /* check for the DW_AT_byte_size attribute */
5872 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5875 length
= DW_UNSND (attr
);
5883 index_type
= objfile_type (objfile
)->builtin_int
;
5884 range_type
= create_range_type (NULL
, index_type
, 1, length
);
5885 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
5886 type
= create_string_type (NULL
, char_type
, range_type
);
5888 return set_die_type (die
, type
, cu
);
5891 /* Handle DIES due to C code like:
5895 int (*funcp)(int a, long l);
5899 ('funcp' generates a DW_TAG_subroutine_type DIE)
5902 static struct type
*
5903 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5905 struct type
*type
; /* Type that this function returns */
5906 struct type
*ftype
; /* Function that returns above type */
5907 struct attribute
*attr
;
5909 type
= die_type (die
, cu
);
5910 ftype
= lookup_function_type (type
);
5912 /* All functions in C++, Pascal and Java have prototypes. */
5913 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
5914 if ((attr
&& (DW_UNSND (attr
) != 0))
5915 || cu
->language
== language_cplus
5916 || cu
->language
== language_java
5917 || cu
->language
== language_pascal
)
5918 TYPE_PROTOTYPED (ftype
) = 1;
5919 else if (producer_is_realview (cu
->producer
))
5920 /* RealView does not emit DW_AT_prototyped. We can not
5921 distinguish prototyped and unprototyped functions; default to
5922 prototyped, since that is more common in modern code (and
5923 RealView warns about unprototyped functions). */
5924 TYPE_PROTOTYPED (ftype
) = 1;
5926 /* Store the calling convention in the type if it's available in
5927 the subroutine die. Otherwise set the calling convention to
5928 the default value DW_CC_normal. */
5929 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
5930 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
5932 /* We need to add the subroutine type to the die immediately so
5933 we don't infinitely recurse when dealing with parameters
5934 declared as the same subroutine type. */
5935 set_die_type (die
, ftype
, cu
);
5937 if (die
->child
!= NULL
)
5939 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
5940 struct die_info
*child_die
;
5941 int nparams
, iparams
;
5943 /* Count the number of parameters.
5944 FIXME: GDB currently ignores vararg functions, but knows about
5945 vararg member functions. */
5947 child_die
= die
->child
;
5948 while (child_die
&& child_die
->tag
)
5950 if (child_die
->tag
== DW_TAG_formal_parameter
)
5952 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
5953 TYPE_VARARGS (ftype
) = 1;
5954 child_die
= sibling_die (child_die
);
5957 /* Allocate storage for parameters and fill them in. */
5958 TYPE_NFIELDS (ftype
) = nparams
;
5959 TYPE_FIELDS (ftype
) = (struct field
*)
5960 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
5962 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
5963 even if we error out during the parameters reading below. */
5964 for (iparams
= 0; iparams
< nparams
; iparams
++)
5965 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
5968 child_die
= die
->child
;
5969 while (child_die
&& child_die
->tag
)
5971 if (child_die
->tag
== DW_TAG_formal_parameter
)
5973 /* Dwarf2 has no clean way to discern C++ static and non-static
5974 member functions. G++ helps GDB by marking the first
5975 parameter for non-static member functions (which is the
5976 this pointer) as artificial. We pass this information
5977 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5978 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
5980 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
5983 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
5985 /* GCC/43521: In java, the formal parameter
5986 "this" is sometimes not marked with DW_AT_artificial. */
5987 if (cu
->language
== language_java
)
5989 const char *name
= dwarf2_name (child_die
, cu
);
5990 if (name
&& !strcmp (name
, "this"))
5991 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
5994 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
5997 child_die
= sibling_die (child_die
);
6004 static struct type
*
6005 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
6007 struct objfile
*objfile
= cu
->objfile
;
6008 struct attribute
*attr
;
6009 const char *name
= NULL
;
6010 struct type
*this_type
;
6012 name
= dwarf2_full_name (NULL
, die
, cu
);
6013 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
6014 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
6015 TYPE_NAME (this_type
) = (char *) name
;
6016 set_die_type (die
, this_type
, cu
);
6017 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
6021 /* Find a representation of a given base type and install
6022 it in the TYPE field of the die. */
6024 static struct type
*
6025 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6027 struct objfile
*objfile
= cu
->objfile
;
6029 struct attribute
*attr
;
6030 int encoding
= 0, size
= 0;
6032 enum type_code code
= TYPE_CODE_INT
;
6034 struct type
*target_type
= NULL
;
6036 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
6039 encoding
= DW_UNSND (attr
);
6041 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6044 size
= DW_UNSND (attr
);
6046 name
= dwarf2_name (die
, cu
);
6049 complaint (&symfile_complaints
,
6050 _("DW_AT_name missing from DW_TAG_base_type"));
6055 case DW_ATE_address
:
6056 /* Turn DW_ATE_address into a void * pointer. */
6057 code
= TYPE_CODE_PTR
;
6058 type_flags
|= TYPE_FLAG_UNSIGNED
;
6059 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
6061 case DW_ATE_boolean
:
6062 code
= TYPE_CODE_BOOL
;
6063 type_flags
|= TYPE_FLAG_UNSIGNED
;
6065 case DW_ATE_complex_float
:
6066 code
= TYPE_CODE_COMPLEX
;
6067 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
6069 case DW_ATE_decimal_float
:
6070 code
= TYPE_CODE_DECFLOAT
;
6073 code
= TYPE_CODE_FLT
;
6077 case DW_ATE_unsigned
:
6078 type_flags
|= TYPE_FLAG_UNSIGNED
;
6080 case DW_ATE_signed_char
:
6081 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6082 || cu
->language
== language_pascal
)
6083 code
= TYPE_CODE_CHAR
;
6085 case DW_ATE_unsigned_char
:
6086 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6087 || cu
->language
== language_pascal
)
6088 code
= TYPE_CODE_CHAR
;
6089 type_flags
|= TYPE_FLAG_UNSIGNED
;
6092 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
6093 dwarf_type_encoding_name (encoding
));
6097 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
6098 TYPE_NAME (type
) = name
;
6099 TYPE_TARGET_TYPE (type
) = target_type
;
6101 if (name
&& strcmp (name
, "char") == 0)
6102 TYPE_NOSIGN (type
) = 1;
6104 return set_die_type (die
, type
, cu
);
6107 /* Read the given DW_AT_subrange DIE. */
6109 static struct type
*
6110 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6112 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
6113 struct type
*base_type
;
6114 struct type
*range_type
;
6115 struct attribute
*attr
;
6119 LONGEST negative_mask
;
6121 base_type
= die_type (die
, cu
);
6122 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
6124 complaint (&symfile_complaints
,
6125 _("DW_AT_type missing from DW_TAG_subrange_type"));
6127 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
6128 0, NULL
, cu
->objfile
);
6131 if (cu
->language
== language_fortran
)
6133 /* FORTRAN implies a lower bound of 1, if not given. */
6137 /* FIXME: For variable sized arrays either of these could be
6138 a variable rather than a constant value. We'll allow it,
6139 but we don't know how to handle it. */
6140 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
6142 low
= dwarf2_get_attr_constant_value (attr
, 0);
6144 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
6147 if (attr
->form
== DW_FORM_block1
)
6149 /* GCC encodes arrays with unspecified or dynamic length
6150 with a DW_FORM_block1 attribute.
6151 FIXME: GDB does not yet know how to handle dynamic
6152 arrays properly, treat them as arrays with unspecified
6155 FIXME: jimb/2003-09-22: GDB does not really know
6156 how to handle arrays of unspecified length
6157 either; we just represent them as zero-length
6158 arrays. Choose an appropriate upper bound given
6159 the lower bound we've computed above. */
6163 high
= dwarf2_get_attr_constant_value (attr
, 1);
6167 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
6168 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
6169 low
|= negative_mask
;
6170 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
6171 high
|= negative_mask
;
6173 range_type
= create_range_type (NULL
, base_type
, low
, high
);
6175 /* Mark arrays with dynamic length at least as an array of unspecified
6176 length. GDB could check the boundary but before it gets implemented at
6177 least allow accessing the array elements. */
6178 if (attr
&& attr
->form
== DW_FORM_block1
)
6179 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
6181 name
= dwarf2_name (die
, cu
);
6183 TYPE_NAME (range_type
) = name
;
6185 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6187 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
6189 set_descriptive_type (range_type
, die
, cu
);
6191 return set_die_type (die
, range_type
, cu
);
6194 static struct type
*
6195 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6199 /* For now, we only support the C meaning of an unspecified type: void. */
6201 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
6202 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
6204 return set_die_type (die
, type
, cu
);
6207 /* Trivial hash function for die_info: the hash value of a DIE
6208 is its offset in .debug_info for this objfile. */
6211 die_hash (const void *item
)
6213 const struct die_info
*die
= item
;
6217 /* Trivial comparison function for die_info structures: two DIEs
6218 are equal if they have the same offset. */
6221 die_eq (const void *item_lhs
, const void *item_rhs
)
6223 const struct die_info
*die_lhs
= item_lhs
;
6224 const struct die_info
*die_rhs
= item_rhs
;
6225 return die_lhs
->offset
== die_rhs
->offset
;
6228 /* Read a whole compilation unit into a linked list of dies. */
6230 static struct die_info
*
6231 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6233 struct die_reader_specs reader_specs
;
6235 gdb_assert (cu
->die_hash
== NULL
);
6237 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6241 &cu
->comp_unit_obstack
,
6242 hashtab_obstack_allocate
,
6243 dummy_obstack_deallocate
);
6245 init_cu_die_reader (&reader_specs
, cu
);
6247 return read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
6250 /* Main entry point for reading a DIE and all children.
6251 Read the DIE and dump it if requested. */
6253 static struct die_info
*
6254 read_die_and_children (const struct die_reader_specs
*reader
,
6256 gdb_byte
**new_info_ptr
,
6257 struct die_info
*parent
)
6259 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
6260 new_info_ptr
, parent
);
6262 if (dwarf2_die_debug
)
6264 fprintf_unfiltered (gdb_stdlog
,
6265 "\nRead die from %s of %s:\n",
6266 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
6268 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
6270 : "unknown section",
6271 reader
->abfd
->filename
);
6272 dump_die (result
, dwarf2_die_debug
);
6278 /* Read a single die and all its descendents. Set the die's sibling
6279 field to NULL; set other fields in the die correctly, and set all
6280 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6281 location of the info_ptr after reading all of those dies. PARENT
6282 is the parent of the die in question. */
6284 static struct die_info
*
6285 read_die_and_children_1 (const struct die_reader_specs
*reader
,
6287 gdb_byte
**new_info_ptr
,
6288 struct die_info
*parent
)
6290 struct die_info
*die
;
6294 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
6297 *new_info_ptr
= cur_ptr
;
6300 store_in_ref_table (die
, reader
->cu
);
6303 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
6307 *new_info_ptr
= cur_ptr
;
6310 die
->sibling
= NULL
;
6311 die
->parent
= parent
;
6315 /* Read a die, all of its descendents, and all of its siblings; set
6316 all of the fields of all of the dies correctly. Arguments are as
6317 in read_die_and_children. */
6319 static struct die_info
*
6320 read_die_and_siblings (const struct die_reader_specs
*reader
,
6322 gdb_byte
**new_info_ptr
,
6323 struct die_info
*parent
)
6325 struct die_info
*first_die
, *last_sibling
;
6329 first_die
= last_sibling
= NULL
;
6333 struct die_info
*die
6334 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
6338 *new_info_ptr
= cur_ptr
;
6345 last_sibling
->sibling
= die
;
6351 /* Read the die from the .debug_info section buffer. Set DIEP to
6352 point to a newly allocated die with its information, except for its
6353 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6354 whether the die has children or not. */
6357 read_full_die (const struct die_reader_specs
*reader
,
6358 struct die_info
**diep
, gdb_byte
*info_ptr
,
6361 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6362 struct abbrev_info
*abbrev
;
6363 struct die_info
*die
;
6364 struct dwarf2_cu
*cu
= reader
->cu
;
6365 bfd
*abfd
= reader
->abfd
;
6367 offset
= info_ptr
- reader
->buffer
;
6368 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6369 info_ptr
+= bytes_read
;
6377 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6379 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6381 bfd_get_filename (abfd
));
6383 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6384 die
->offset
= offset
;
6385 die
->tag
= abbrev
->tag
;
6386 die
->abbrev
= abbrev_number
;
6388 die
->num_attrs
= abbrev
->num_attrs
;
6390 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6391 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6392 abfd
, info_ptr
, cu
);
6395 *has_children
= abbrev
->has_children
;
6399 /* In DWARF version 2, the description of the debugging information is
6400 stored in a separate .debug_abbrev section. Before we read any
6401 dies from a section we read in all abbreviations and install them
6402 in a hash table. This function also sets flags in CU describing
6403 the data found in the abbrev table. */
6406 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
6408 struct comp_unit_head
*cu_header
= &cu
->header
;
6409 gdb_byte
*abbrev_ptr
;
6410 struct abbrev_info
*cur_abbrev
;
6411 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
6412 unsigned int abbrev_form
, hash_number
;
6413 struct attr_abbrev
*cur_attrs
;
6414 unsigned int allocated_attrs
;
6416 /* Initialize dwarf2 abbrevs */
6417 obstack_init (&cu
->abbrev_obstack
);
6418 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
6420 * sizeof (struct abbrev_info
*)));
6421 memset (cu
->dwarf2_abbrevs
, 0,
6422 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
6424 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
6425 &dwarf2_per_objfile
->abbrev
);
6426 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
6427 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6428 abbrev_ptr
+= bytes_read
;
6430 allocated_attrs
= ATTR_ALLOC_CHUNK
;
6431 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
6433 /* loop until we reach an abbrev number of 0 */
6434 while (abbrev_number
)
6436 cur_abbrev
= dwarf_alloc_abbrev (cu
);
6438 /* read in abbrev header */
6439 cur_abbrev
->number
= abbrev_number
;
6440 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6441 abbrev_ptr
+= bytes_read
;
6442 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
6445 if (cur_abbrev
->tag
== DW_TAG_namespace
)
6446 cu
->has_namespace_info
= 1;
6448 /* now read in declarations */
6449 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6450 abbrev_ptr
+= bytes_read
;
6451 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6452 abbrev_ptr
+= bytes_read
;
6455 if (cur_abbrev
->num_attrs
== allocated_attrs
)
6457 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
6459 = xrealloc (cur_attrs
, (allocated_attrs
6460 * sizeof (struct attr_abbrev
)));
6463 /* Record whether this compilation unit might have
6464 inter-compilation-unit references. If we don't know what form
6465 this attribute will have, then it might potentially be a
6466 DW_FORM_ref_addr, so we conservatively expect inter-CU
6469 if (abbrev_form
== DW_FORM_ref_addr
6470 || abbrev_form
== DW_FORM_indirect
)
6471 cu
->has_form_ref_addr
= 1;
6473 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
6474 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
6475 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6476 abbrev_ptr
+= bytes_read
;
6477 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6478 abbrev_ptr
+= bytes_read
;
6481 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
6482 (cur_abbrev
->num_attrs
6483 * sizeof (struct attr_abbrev
)));
6484 memcpy (cur_abbrev
->attrs
, cur_attrs
,
6485 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
6487 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
6488 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
6489 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
6491 /* Get next abbreviation.
6492 Under Irix6 the abbreviations for a compilation unit are not
6493 always properly terminated with an abbrev number of 0.
6494 Exit loop if we encounter an abbreviation which we have
6495 already read (which means we are about to read the abbreviations
6496 for the next compile unit) or if the end of the abbreviation
6497 table is reached. */
6498 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
6499 >= dwarf2_per_objfile
->abbrev
.size
)
6501 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6502 abbrev_ptr
+= bytes_read
;
6503 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
6510 /* Release the memory used by the abbrev table for a compilation unit. */
6513 dwarf2_free_abbrev_table (void *ptr_to_cu
)
6515 struct dwarf2_cu
*cu
= ptr_to_cu
;
6517 obstack_free (&cu
->abbrev_obstack
, NULL
);
6518 cu
->dwarf2_abbrevs
= NULL
;
6521 /* Lookup an abbrev_info structure in the abbrev hash table. */
6523 static struct abbrev_info
*
6524 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
6526 unsigned int hash_number
;
6527 struct abbrev_info
*abbrev
;
6529 hash_number
= number
% ABBREV_HASH_SIZE
;
6530 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
6534 if (abbrev
->number
== number
)
6537 abbrev
= abbrev
->next
;
6542 /* Returns nonzero if TAG represents a type that we might generate a partial
6546 is_type_tag_for_partial (int tag
)
6551 /* Some types that would be reasonable to generate partial symbols for,
6552 that we don't at present. */
6553 case DW_TAG_array_type
:
6554 case DW_TAG_file_type
:
6555 case DW_TAG_ptr_to_member_type
:
6556 case DW_TAG_set_type
:
6557 case DW_TAG_string_type
:
6558 case DW_TAG_subroutine_type
:
6560 case DW_TAG_base_type
:
6561 case DW_TAG_class_type
:
6562 case DW_TAG_interface_type
:
6563 case DW_TAG_enumeration_type
:
6564 case DW_TAG_structure_type
:
6565 case DW_TAG_subrange_type
:
6566 case DW_TAG_typedef
:
6567 case DW_TAG_union_type
:
6574 /* Load all DIEs that are interesting for partial symbols into memory. */
6576 static struct partial_die_info
*
6577 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6578 int building_psymtab
, struct dwarf2_cu
*cu
)
6580 struct partial_die_info
*part_die
;
6581 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
6582 struct abbrev_info
*abbrev
;
6583 unsigned int bytes_read
;
6584 unsigned int load_all
= 0;
6586 int nesting_level
= 1;
6591 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
6595 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6599 &cu
->comp_unit_obstack
,
6600 hashtab_obstack_allocate
,
6601 dummy_obstack_deallocate
);
6603 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6604 sizeof (struct partial_die_info
));
6608 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6610 /* A NULL abbrev means the end of a series of children. */
6613 if (--nesting_level
== 0)
6615 /* PART_DIE was probably the last thing allocated on the
6616 comp_unit_obstack, so we could call obstack_free
6617 here. We don't do that because the waste is small,
6618 and will be cleaned up when we're done with this
6619 compilation unit. This way, we're also more robust
6620 against other users of the comp_unit_obstack. */
6623 info_ptr
+= bytes_read
;
6624 last_die
= parent_die
;
6625 parent_die
= parent_die
->die_parent
;
6629 /* Check whether this DIE is interesting enough to save. Normally
6630 we would not be interested in members here, but there may be
6631 later variables referencing them via DW_AT_specification (for
6634 && !is_type_tag_for_partial (abbrev
->tag
)
6635 && abbrev
->tag
!= DW_TAG_enumerator
6636 && abbrev
->tag
!= DW_TAG_subprogram
6637 && abbrev
->tag
!= DW_TAG_lexical_block
6638 && abbrev
->tag
!= DW_TAG_variable
6639 && abbrev
->tag
!= DW_TAG_namespace
6640 && abbrev
->tag
!= DW_TAG_member
)
6642 /* Otherwise we skip to the next sibling, if any. */
6643 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
6647 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
6648 buffer
, info_ptr
, cu
);
6650 /* This two-pass algorithm for processing partial symbols has a
6651 high cost in cache pressure. Thus, handle some simple cases
6652 here which cover the majority of C partial symbols. DIEs
6653 which neither have specification tags in them, nor could have
6654 specification tags elsewhere pointing at them, can simply be
6655 processed and discarded.
6657 This segment is also optional; scan_partial_symbols and
6658 add_partial_symbol will handle these DIEs if we chain
6659 them in normally. When compilers which do not emit large
6660 quantities of duplicate debug information are more common,
6661 this code can probably be removed. */
6663 /* Any complete simple types at the top level (pretty much all
6664 of them, for a language without namespaces), can be processed
6666 if (parent_die
== NULL
6667 && part_die
->has_specification
== 0
6668 && part_die
->is_declaration
== 0
6669 && (part_die
->tag
== DW_TAG_typedef
6670 || part_die
->tag
== DW_TAG_base_type
6671 || part_die
->tag
== DW_TAG_subrange_type
))
6673 if (building_psymtab
&& part_die
->name
!= NULL
)
6674 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6675 VAR_DOMAIN
, LOC_TYPEDEF
,
6676 &cu
->objfile
->static_psymbols
,
6677 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6678 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6682 /* If we're at the second level, and we're an enumerator, and
6683 our parent has no specification (meaning possibly lives in a
6684 namespace elsewhere), then we can add the partial symbol now
6685 instead of queueing it. */
6686 if (part_die
->tag
== DW_TAG_enumerator
6687 && parent_die
!= NULL
6688 && parent_die
->die_parent
== NULL
6689 && parent_die
->tag
== DW_TAG_enumeration_type
6690 && parent_die
->has_specification
== 0)
6692 if (part_die
->name
== NULL
)
6693 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6694 else if (building_psymtab
)
6695 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6696 VAR_DOMAIN
, LOC_CONST
,
6697 (cu
->language
== language_cplus
6698 || cu
->language
== language_java
)
6699 ? &cu
->objfile
->global_psymbols
6700 : &cu
->objfile
->static_psymbols
,
6701 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6703 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6707 /* We'll save this DIE so link it in. */
6708 part_die
->die_parent
= parent_die
;
6709 part_die
->die_sibling
= NULL
;
6710 part_die
->die_child
= NULL
;
6712 if (last_die
&& last_die
== parent_die
)
6713 last_die
->die_child
= part_die
;
6715 last_die
->die_sibling
= part_die
;
6717 last_die
= part_die
;
6719 if (first_die
== NULL
)
6720 first_die
= part_die
;
6722 /* Maybe add the DIE to the hash table. Not all DIEs that we
6723 find interesting need to be in the hash table, because we
6724 also have the parent/sibling/child chains; only those that we
6725 might refer to by offset later during partial symbol reading.
6727 For now this means things that might have be the target of a
6728 DW_AT_specification, DW_AT_abstract_origin, or
6729 DW_AT_extension. DW_AT_extension will refer only to
6730 namespaces; DW_AT_abstract_origin refers to functions (and
6731 many things under the function DIE, but we do not recurse
6732 into function DIEs during partial symbol reading) and
6733 possibly variables as well; DW_AT_specification refers to
6734 declarations. Declarations ought to have the DW_AT_declaration
6735 flag. It happens that GCC forgets to put it in sometimes, but
6736 only for functions, not for types.
6738 Adding more things than necessary to the hash table is harmless
6739 except for the performance cost. Adding too few will result in
6740 wasted time in find_partial_die, when we reread the compilation
6741 unit with load_all_dies set. */
6744 || abbrev
->tag
== DW_TAG_subprogram
6745 || abbrev
->tag
== DW_TAG_variable
6746 || abbrev
->tag
== DW_TAG_namespace
6747 || part_die
->is_declaration
)
6751 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
6752 part_die
->offset
, INSERT
);
6756 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6757 sizeof (struct partial_die_info
));
6759 /* For some DIEs we want to follow their children (if any). For C
6760 we have no reason to follow the children of structures; for other
6761 languages we have to, both so that we can get at method physnames
6762 to infer fully qualified class names, and for DW_AT_specification.
6764 For Ada, we need to scan the children of subprograms and lexical
6765 blocks as well because Ada allows the definition of nested
6766 entities that could be interesting for the debugger, such as
6767 nested subprograms for instance. */
6768 if (last_die
->has_children
6770 || last_die
->tag
== DW_TAG_namespace
6771 || last_die
->tag
== DW_TAG_enumeration_type
6772 || (cu
->language
!= language_c
6773 && (last_die
->tag
== DW_TAG_class_type
6774 || last_die
->tag
== DW_TAG_interface_type
6775 || last_die
->tag
== DW_TAG_structure_type
6776 || last_die
->tag
== DW_TAG_union_type
))
6777 || (cu
->language
== language_ada
6778 && (last_die
->tag
== DW_TAG_subprogram
6779 || last_die
->tag
== DW_TAG_lexical_block
))))
6782 parent_die
= last_die
;
6786 /* Otherwise we skip to the next sibling, if any. */
6787 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
6789 /* Back to the top, do it again. */
6793 /* Read a minimal amount of information into the minimal die structure. */
6796 read_partial_die (struct partial_die_info
*part_die
,
6797 struct abbrev_info
*abbrev
,
6798 unsigned int abbrev_len
, bfd
*abfd
,
6799 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6800 struct dwarf2_cu
*cu
)
6802 unsigned int bytes_read
, i
;
6803 struct attribute attr
;
6804 int has_low_pc_attr
= 0;
6805 int has_high_pc_attr
= 0;
6807 memset (part_die
, 0, sizeof (struct partial_die_info
));
6809 part_die
->offset
= info_ptr
- buffer
;
6811 info_ptr
+= abbrev_len
;
6816 part_die
->tag
= abbrev
->tag
;
6817 part_die
->has_children
= abbrev
->has_children
;
6819 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6821 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
6823 /* Store the data if it is of an attribute we want to keep in a
6824 partial symbol table. */
6828 switch (part_die
->tag
)
6830 case DW_TAG_compile_unit
:
6831 case DW_TAG_type_unit
:
6832 /* Compilation units have a DW_AT_name that is a filename, not
6833 a source language identifier. */
6834 case DW_TAG_enumeration_type
:
6835 case DW_TAG_enumerator
:
6836 /* These tags always have simple identifiers already; no need
6837 to canonicalize them. */
6838 part_die
->name
= DW_STRING (&attr
);
6842 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
6843 &cu
->objfile
->objfile_obstack
);
6847 case DW_AT_MIPS_linkage_name
:
6848 if (cu
->language
== language_ada
)
6849 part_die
->name
= DW_STRING (&attr
);
6852 has_low_pc_attr
= 1;
6853 part_die
->lowpc
= DW_ADDR (&attr
);
6856 has_high_pc_attr
= 1;
6857 part_die
->highpc
= DW_ADDR (&attr
);
6859 case DW_AT_location
:
6860 /* Support the .debug_loc offsets */
6861 if (attr_form_is_block (&attr
))
6863 part_die
->locdesc
= DW_BLOCK (&attr
);
6865 else if (attr_form_is_section_offset (&attr
))
6867 dwarf2_complex_location_expr_complaint ();
6871 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6872 "partial symbol information");
6875 case DW_AT_external
:
6876 part_die
->is_external
= DW_UNSND (&attr
);
6878 case DW_AT_declaration
:
6879 part_die
->is_declaration
= DW_UNSND (&attr
);
6882 part_die
->has_type
= 1;
6884 case DW_AT_abstract_origin
:
6885 case DW_AT_specification
:
6886 case DW_AT_extension
:
6887 part_die
->has_specification
= 1;
6888 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
6891 /* Ignore absolute siblings, they might point outside of
6892 the current compile unit. */
6893 if (attr
.form
== DW_FORM_ref_addr
)
6894 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
6896 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
6898 case DW_AT_byte_size
:
6899 part_die
->has_byte_size
= 1;
6901 case DW_AT_calling_convention
:
6902 /* DWARF doesn't provide a way to identify a program's source-level
6903 entry point. DW_AT_calling_convention attributes are only meant
6904 to describe functions' calling conventions.
6906 However, because it's a necessary piece of information in
6907 Fortran, and because DW_CC_program is the only piece of debugging
6908 information whose definition refers to a 'main program' at all,
6909 several compilers have begun marking Fortran main programs with
6910 DW_CC_program --- even when those functions use the standard
6911 calling conventions.
6913 So until DWARF specifies a way to provide this information and
6914 compilers pick up the new representation, we'll support this
6916 if (DW_UNSND (&attr
) == DW_CC_program
6917 && cu
->language
== language_fortran
)
6918 set_main_name (part_die
->name
);
6925 /* When using the GNU linker, .gnu.linkonce. sections are used to
6926 eliminate duplicate copies of functions and vtables and such.
6927 The linker will arbitrarily choose one and discard the others.
6928 The AT_*_pc values for such functions refer to local labels in
6929 these sections. If the section from that file was discarded, the
6930 labels are not in the output, so the relocs get a value of 0.
6931 If this is a discarded function, mark the pc bounds as invalid,
6932 so that GDB will ignore it. */
6933 if (has_low_pc_attr
&& has_high_pc_attr
6934 && part_die
->lowpc
< part_die
->highpc
6935 && (part_die
->lowpc
!= 0
6936 || dwarf2_per_objfile
->has_section_at_zero
))
6937 part_die
->has_pc_info
= 1;
6942 /* Find a cached partial DIE at OFFSET in CU. */
6944 static struct partial_die_info
*
6945 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
6947 struct partial_die_info
*lookup_die
= NULL
;
6948 struct partial_die_info part_die
;
6950 part_die
.offset
= offset
;
6951 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
6956 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6957 except in the case of .debug_types DIEs which do not reference
6958 outside their CU (they do however referencing other types via
6961 static struct partial_die_info
*
6962 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
6964 struct dwarf2_per_cu_data
*per_cu
= NULL
;
6965 struct partial_die_info
*pd
= NULL
;
6967 if (cu
->per_cu
->from_debug_types
)
6969 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6975 if (offset_in_cu_p (&cu
->header
, offset
))
6977 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6982 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
6984 if (per_cu
->cu
== NULL
)
6986 load_partial_comp_unit (per_cu
, cu
->objfile
);
6987 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6988 dwarf2_per_objfile
->read_in_chain
= per_cu
;
6991 per_cu
->cu
->last_used
= 0;
6992 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6994 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
6996 struct cleanup
*back_to
;
6997 struct partial_die_info comp_unit_die
;
6998 struct abbrev_info
*abbrev
;
6999 unsigned int bytes_read
;
7002 per_cu
->load_all_dies
= 1;
7004 /* Re-read the DIEs. */
7005 back_to
= make_cleanup (null_cleanup
, 0);
7006 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
7008 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
7009 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
7011 info_ptr
= (dwarf2_per_objfile
->info
.buffer
7012 + per_cu
->cu
->header
.offset
7013 + per_cu
->cu
->header
.first_die_offset
);
7014 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
7015 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
7016 per_cu
->cu
->objfile
->obfd
,
7017 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
7019 if (comp_unit_die
.has_children
)
7020 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
7021 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
7023 do_cleanups (back_to
);
7025 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
7031 internal_error (__FILE__
, __LINE__
,
7032 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
7033 offset
, bfd_get_filename (cu
->objfile
->obfd
));
7037 /* Adjust PART_DIE before generating a symbol for it. This function
7038 may set the is_external flag or change the DIE's name. */
7041 fixup_partial_die (struct partial_die_info
*part_die
,
7042 struct dwarf2_cu
*cu
)
7044 /* If we found a reference attribute and the DIE has no name, try
7045 to find a name in the referred to DIE. */
7047 if (part_die
->name
== NULL
&& part_die
->has_specification
)
7049 struct partial_die_info
*spec_die
;
7051 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
7053 fixup_partial_die (spec_die
, cu
);
7057 part_die
->name
= spec_die
->name
;
7059 /* Copy DW_AT_external attribute if it is set. */
7060 if (spec_die
->is_external
)
7061 part_die
->is_external
= spec_die
->is_external
;
7065 /* Set default names for some unnamed DIEs. */
7066 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
7067 || part_die
->tag
== DW_TAG_class_type
))
7068 part_die
->name
= "(anonymous class)";
7070 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
7071 part_die
->name
= "(anonymous namespace)";
7073 if (part_die
->tag
== DW_TAG_structure_type
7074 || part_die
->tag
== DW_TAG_class_type
7075 || part_die
->tag
== DW_TAG_union_type
)
7076 guess_structure_name (part_die
, cu
);
7079 /* Read an attribute value described by an attribute form. */
7082 read_attribute_value (struct attribute
*attr
, unsigned form
,
7083 bfd
*abfd
, gdb_byte
*info_ptr
,
7084 struct dwarf2_cu
*cu
)
7086 struct comp_unit_head
*cu_header
= &cu
->header
;
7087 unsigned int bytes_read
;
7088 struct dwarf_block
*blk
;
7093 case DW_FORM_ref_addr
:
7094 if (cu
->header
.version
== 2)
7095 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7097 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
7098 info_ptr
+= bytes_read
;
7101 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7102 info_ptr
+= bytes_read
;
7104 case DW_FORM_block2
:
7105 blk
= dwarf_alloc_block (cu
);
7106 blk
->size
= read_2_bytes (abfd
, info_ptr
);
7108 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7109 info_ptr
+= blk
->size
;
7110 DW_BLOCK (attr
) = blk
;
7112 case DW_FORM_block4
:
7113 blk
= dwarf_alloc_block (cu
);
7114 blk
->size
= read_4_bytes (abfd
, info_ptr
);
7116 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7117 info_ptr
+= blk
->size
;
7118 DW_BLOCK (attr
) = blk
;
7121 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
7125 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
7129 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
7132 case DW_FORM_string
:
7133 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
7134 DW_STRING_IS_CANONICAL (attr
) = 0;
7135 info_ptr
+= bytes_read
;
7138 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
7140 DW_STRING_IS_CANONICAL (attr
) = 0;
7141 info_ptr
+= bytes_read
;
7144 blk
= dwarf_alloc_block (cu
);
7145 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7146 info_ptr
+= bytes_read
;
7147 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7148 info_ptr
+= blk
->size
;
7149 DW_BLOCK (attr
) = blk
;
7151 case DW_FORM_block1
:
7152 blk
= dwarf_alloc_block (cu
);
7153 blk
->size
= read_1_byte (abfd
, info_ptr
);
7155 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7156 info_ptr
+= blk
->size
;
7157 DW_BLOCK (attr
) = blk
;
7160 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7164 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7168 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
7169 info_ptr
+= bytes_read
;
7172 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7173 info_ptr
+= bytes_read
;
7176 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
7180 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
7184 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
7188 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
7192 /* Convert the signature to something we can record in DW_UNSND
7194 NOTE: This is NULL if the type wasn't found. */
7195 DW_SIGNATURED_TYPE (attr
) =
7196 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
7199 case DW_FORM_ref_udata
:
7200 DW_ADDR (attr
) = (cu
->header
.offset
7201 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
7202 info_ptr
+= bytes_read
;
7204 case DW_FORM_indirect
:
7205 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7206 info_ptr
+= bytes_read
;
7207 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
7210 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7211 dwarf_form_name (form
),
7212 bfd_get_filename (abfd
));
7215 /* We have seen instances where the compiler tried to emit a byte
7216 size attribute of -1 which ended up being encoded as an unsigned
7217 0xffffffff. Although 0xffffffff is technically a valid size value,
7218 an object of this size seems pretty unlikely so we can relatively
7219 safely treat these cases as if the size attribute was invalid and
7220 treat them as zero by default. */
7221 if (attr
->name
== DW_AT_byte_size
7222 && form
== DW_FORM_data4
7223 && DW_UNSND (attr
) >= 0xffffffff)
7226 (&symfile_complaints
,
7227 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
7228 hex_string (DW_UNSND (attr
)));
7229 DW_UNSND (attr
) = 0;
7235 /* Read an attribute described by an abbreviated attribute. */
7238 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
7239 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
7241 attr
->name
= abbrev
->name
;
7242 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
7245 /* read dwarf information from a buffer */
7248 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
7250 return bfd_get_8 (abfd
, buf
);
7254 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
7256 return bfd_get_signed_8 (abfd
, buf
);
7260 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
7262 return bfd_get_16 (abfd
, buf
);
7266 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7268 return bfd_get_signed_16 (abfd
, buf
);
7272 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
7274 return bfd_get_32 (abfd
, buf
);
7278 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7280 return bfd_get_signed_32 (abfd
, buf
);
7284 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
7286 return bfd_get_64 (abfd
, buf
);
7290 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
7291 unsigned int *bytes_read
)
7293 struct comp_unit_head
*cu_header
= &cu
->header
;
7294 CORE_ADDR retval
= 0;
7296 if (cu_header
->signed_addr_p
)
7298 switch (cu_header
->addr_size
)
7301 retval
= bfd_get_signed_16 (abfd
, buf
);
7304 retval
= bfd_get_signed_32 (abfd
, buf
);
7307 retval
= bfd_get_signed_64 (abfd
, buf
);
7310 internal_error (__FILE__
, __LINE__
,
7311 _("read_address: bad switch, signed [in module %s]"),
7312 bfd_get_filename (abfd
));
7317 switch (cu_header
->addr_size
)
7320 retval
= bfd_get_16 (abfd
, buf
);
7323 retval
= bfd_get_32 (abfd
, buf
);
7326 retval
= bfd_get_64 (abfd
, buf
);
7329 internal_error (__FILE__
, __LINE__
,
7330 _("read_address: bad switch, unsigned [in module %s]"),
7331 bfd_get_filename (abfd
));
7335 *bytes_read
= cu_header
->addr_size
;
7339 /* Read the initial length from a section. The (draft) DWARF 3
7340 specification allows the initial length to take up either 4 bytes
7341 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7342 bytes describe the length and all offsets will be 8 bytes in length
7345 An older, non-standard 64-bit format is also handled by this
7346 function. The older format in question stores the initial length
7347 as an 8-byte quantity without an escape value. Lengths greater
7348 than 2^32 aren't very common which means that the initial 4 bytes
7349 is almost always zero. Since a length value of zero doesn't make
7350 sense for the 32-bit format, this initial zero can be considered to
7351 be an escape value which indicates the presence of the older 64-bit
7352 format. As written, the code can't detect (old format) lengths
7353 greater than 4GB. If it becomes necessary to handle lengths
7354 somewhat larger than 4GB, we could allow other small values (such
7355 as the non-sensical values of 1, 2, and 3) to also be used as
7356 escape values indicating the presence of the old format.
7358 The value returned via bytes_read should be used to increment the
7359 relevant pointer after calling read_initial_length().
7361 [ Note: read_initial_length() and read_offset() are based on the
7362 document entitled "DWARF Debugging Information Format", revision
7363 3, draft 8, dated November 19, 2001. This document was obtained
7366 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7368 This document is only a draft and is subject to change. (So beware.)
7370 Details regarding the older, non-standard 64-bit format were
7371 determined empirically by examining 64-bit ELF files produced by
7372 the SGI toolchain on an IRIX 6.5 machine.
7374 - Kevin, July 16, 2002
7378 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
7380 LONGEST length
= bfd_get_32 (abfd
, buf
);
7382 if (length
== 0xffffffff)
7384 length
= bfd_get_64 (abfd
, buf
+ 4);
7387 else if (length
== 0)
7389 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7390 length
= bfd_get_64 (abfd
, buf
);
7401 /* Cover function for read_initial_length.
7402 Returns the length of the object at BUF, and stores the size of the
7403 initial length in *BYTES_READ and stores the size that offsets will be in
7405 If the initial length size is not equivalent to that specified in
7406 CU_HEADER then issue a complaint.
7407 This is useful when reading non-comp-unit headers. */
7410 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
7411 const struct comp_unit_head
*cu_header
,
7412 unsigned int *bytes_read
,
7413 unsigned int *offset_size
)
7415 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
7417 gdb_assert (cu_header
->initial_length_size
== 4
7418 || cu_header
->initial_length_size
== 8
7419 || cu_header
->initial_length_size
== 12);
7421 if (cu_header
->initial_length_size
!= *bytes_read
)
7422 complaint (&symfile_complaints
,
7423 _("intermixed 32-bit and 64-bit DWARF sections"));
7425 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
7429 /* Read an offset from the data stream. The size of the offset is
7430 given by cu_header->offset_size. */
7433 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
7434 unsigned int *bytes_read
)
7436 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
7437 *bytes_read
= cu_header
->offset_size
;
7441 /* Read an offset from the data stream. */
7444 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
7448 switch (offset_size
)
7451 retval
= bfd_get_32 (abfd
, buf
);
7454 retval
= bfd_get_64 (abfd
, buf
);
7457 internal_error (__FILE__
, __LINE__
,
7458 _("read_offset_1: bad switch [in module %s]"),
7459 bfd_get_filename (abfd
));
7466 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
7468 /* If the size of a host char is 8 bits, we can return a pointer
7469 to the buffer, otherwise we have to copy the data to a buffer
7470 allocated on the temporary obstack. */
7471 gdb_assert (HOST_CHAR_BIT
== 8);
7476 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7478 /* If the size of a host char is 8 bits, we can return a pointer
7479 to the string, otherwise we have to copy the string to a buffer
7480 allocated on the temporary obstack. */
7481 gdb_assert (HOST_CHAR_BIT
== 8);
7484 *bytes_read_ptr
= 1;
7487 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
7488 return (char *) buf
;
7492 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
7493 const struct comp_unit_head
*cu_header
,
7494 unsigned int *bytes_read_ptr
)
7496 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
7498 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
7499 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
7501 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7502 bfd_get_filename (abfd
));
7505 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
7507 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7508 bfd_get_filename (abfd
));
7511 gdb_assert (HOST_CHAR_BIT
== 8);
7512 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
7514 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
7517 static unsigned long
7518 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7520 unsigned long result
;
7521 unsigned int num_read
;
7531 byte
= bfd_get_8 (abfd
, buf
);
7534 result
|= ((unsigned long)(byte
& 127) << shift
);
7535 if ((byte
& 128) == 0)
7541 *bytes_read_ptr
= num_read
;
7546 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7549 int i
, shift
, num_read
;
7558 byte
= bfd_get_8 (abfd
, buf
);
7561 result
|= ((long)(byte
& 127) << shift
);
7563 if ((byte
& 128) == 0)
7568 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
7569 result
|= -(((long)1) << shift
);
7570 *bytes_read_ptr
= num_read
;
7574 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7577 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
7583 byte
= bfd_get_8 (abfd
, buf
);
7585 if ((byte
& 128) == 0)
7591 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
7598 cu
->language
= language_c
;
7600 case DW_LANG_C_plus_plus
:
7601 cu
->language
= language_cplus
;
7603 case DW_LANG_Fortran77
:
7604 case DW_LANG_Fortran90
:
7605 case DW_LANG_Fortran95
:
7606 cu
->language
= language_fortran
;
7608 case DW_LANG_Mips_Assembler
:
7609 cu
->language
= language_asm
;
7612 cu
->language
= language_java
;
7616 cu
->language
= language_ada
;
7618 case DW_LANG_Modula2
:
7619 cu
->language
= language_m2
;
7621 case DW_LANG_Pascal83
:
7622 cu
->language
= language_pascal
;
7625 cu
->language
= language_objc
;
7627 case DW_LANG_Cobol74
:
7628 case DW_LANG_Cobol85
:
7630 cu
->language
= language_minimal
;
7633 cu
->language_defn
= language_def (cu
->language
);
7636 /* Return the named attribute or NULL if not there. */
7638 static struct attribute
*
7639 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7642 struct attribute
*spec
= NULL
;
7644 for (i
= 0; i
< die
->num_attrs
; ++i
)
7646 if (die
->attrs
[i
].name
== name
)
7647 return &die
->attrs
[i
];
7648 if (die
->attrs
[i
].name
== DW_AT_specification
7649 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7650 spec
= &die
->attrs
[i
];
7655 die
= follow_die_ref (die
, spec
, &cu
);
7656 return dwarf2_attr (die
, name
, cu
);
7662 /* Return the named attribute or NULL if not there,
7663 but do not follow DW_AT_specification, etc.
7664 This is for use in contexts where we're reading .debug_types dies.
7665 Following DW_AT_specification, DW_AT_abstract_origin will take us
7666 back up the chain, and we want to go down. */
7668 static struct attribute
*
7669 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
7670 struct dwarf2_cu
*cu
)
7674 for (i
= 0; i
< die
->num_attrs
; ++i
)
7675 if (die
->attrs
[i
].name
== name
)
7676 return &die
->attrs
[i
];
7681 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7682 and holds a non-zero value. This function should only be used for
7683 DW_FORM_flag attributes. */
7686 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7688 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7690 return (attr
&& DW_UNSND (attr
));
7694 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7696 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7697 which value is non-zero. However, we have to be careful with
7698 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7699 (via dwarf2_flag_true_p) follows this attribute. So we may
7700 end up accidently finding a declaration attribute that belongs
7701 to a different DIE referenced by the specification attribute,
7702 even though the given DIE does not have a declaration attribute. */
7703 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7704 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7707 /* Return the die giving the specification for DIE, if there is
7708 one. *SPEC_CU is the CU containing DIE on input, and the CU
7709 containing the return value on output. If there is no
7710 specification, but there is an abstract origin, that is
7713 static struct die_info
*
7714 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7716 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
7719 if (spec_attr
== NULL
)
7720 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
7722 if (spec_attr
== NULL
)
7725 return follow_die_ref (die
, spec_attr
, spec_cu
);
7728 /* Free the line_header structure *LH, and any arrays and strings it
7731 free_line_header (struct line_header
*lh
)
7733 if (lh
->standard_opcode_lengths
)
7734 xfree (lh
->standard_opcode_lengths
);
7736 /* Remember that all the lh->file_names[i].name pointers are
7737 pointers into debug_line_buffer, and don't need to be freed. */
7739 xfree (lh
->file_names
);
7741 /* Similarly for the include directory names. */
7742 if (lh
->include_dirs
)
7743 xfree (lh
->include_dirs
);
7749 /* Add an entry to LH's include directory table. */
7751 add_include_dir (struct line_header
*lh
, char *include_dir
)
7753 /* Grow the array if necessary. */
7754 if (lh
->include_dirs_size
== 0)
7756 lh
->include_dirs_size
= 1; /* for testing */
7757 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
7758 * sizeof (*lh
->include_dirs
));
7760 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
7762 lh
->include_dirs_size
*= 2;
7763 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
7764 (lh
->include_dirs_size
7765 * sizeof (*lh
->include_dirs
)));
7768 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
7772 /* Add an entry to LH's file name table. */
7774 add_file_name (struct line_header
*lh
,
7776 unsigned int dir_index
,
7777 unsigned int mod_time
,
7778 unsigned int length
)
7780 struct file_entry
*fe
;
7782 /* Grow the array if necessary. */
7783 if (lh
->file_names_size
== 0)
7785 lh
->file_names_size
= 1; /* for testing */
7786 lh
->file_names
= xmalloc (lh
->file_names_size
7787 * sizeof (*lh
->file_names
));
7789 else if (lh
->num_file_names
>= lh
->file_names_size
)
7791 lh
->file_names_size
*= 2;
7792 lh
->file_names
= xrealloc (lh
->file_names
,
7793 (lh
->file_names_size
7794 * sizeof (*lh
->file_names
)));
7797 fe
= &lh
->file_names
[lh
->num_file_names
++];
7799 fe
->dir_index
= dir_index
;
7800 fe
->mod_time
= mod_time
;
7801 fe
->length
= length
;
7807 /* Read the statement program header starting at OFFSET in
7808 .debug_line, according to the endianness of ABFD. Return a pointer
7809 to a struct line_header, allocated using xmalloc.
7811 NOTE: the strings in the include directory and file name tables of
7812 the returned object point into debug_line_buffer, and must not be
7814 static struct line_header
*
7815 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
7816 struct dwarf2_cu
*cu
)
7818 struct cleanup
*back_to
;
7819 struct line_header
*lh
;
7821 unsigned int bytes_read
, offset_size
;
7823 char *cur_dir
, *cur_file
;
7825 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
7826 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
7828 complaint (&symfile_complaints
, _("missing .debug_line section"));
7832 /* Make sure that at least there's room for the total_length field.
7833 That could be 12 bytes long, but we're just going to fudge that. */
7834 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
7836 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7840 lh
= xmalloc (sizeof (*lh
));
7841 memset (lh
, 0, sizeof (*lh
));
7842 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
7845 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
7847 /* Read in the header. */
7849 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
7850 &bytes_read
, &offset_size
);
7851 line_ptr
+= bytes_read
;
7852 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
7853 + dwarf2_per_objfile
->line
.size
))
7855 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7858 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
7859 lh
->version
= read_2_bytes (abfd
, line_ptr
);
7861 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
7862 line_ptr
+= offset_size
;
7863 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
7865 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
7867 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
7869 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
7871 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
7873 lh
->standard_opcode_lengths
7874 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
7876 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
7877 for (i
= 1; i
< lh
->opcode_base
; ++i
)
7879 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
7883 /* Read directory table. */
7884 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7886 line_ptr
+= bytes_read
;
7887 add_include_dir (lh
, cur_dir
);
7889 line_ptr
+= bytes_read
;
7891 /* Read file name table. */
7892 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7894 unsigned int dir_index
, mod_time
, length
;
7896 line_ptr
+= bytes_read
;
7897 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7898 line_ptr
+= bytes_read
;
7899 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7900 line_ptr
+= bytes_read
;
7901 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7902 line_ptr
+= bytes_read
;
7904 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7906 line_ptr
+= bytes_read
;
7907 lh
->statement_program_start
= line_ptr
;
7909 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
7910 + dwarf2_per_objfile
->line
.size
))
7911 complaint (&symfile_complaints
,
7912 _("line number info header doesn't fit in `.debug_line' section"));
7914 discard_cleanups (back_to
);
7918 /* This function exists to work around a bug in certain compilers
7919 (particularly GCC 2.95), in which the first line number marker of a
7920 function does not show up until after the prologue, right before
7921 the second line number marker. This function shifts ADDRESS down
7922 to the beginning of the function if necessary, and is called on
7923 addresses passed to record_line. */
7926 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
7928 struct function_range
*fn
;
7930 /* Find the function_range containing address. */
7935 cu
->cached_fn
= cu
->first_fn
;
7939 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7945 while (fn
&& fn
!= cu
->cached_fn
)
7946 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7956 if (address
!= fn
->lowpc
)
7957 complaint (&symfile_complaints
,
7958 _("misplaced first line number at 0x%lx for '%s'"),
7959 (unsigned long) address
, fn
->name
);
7964 /* Decode the Line Number Program (LNP) for the given line_header
7965 structure and CU. The actual information extracted and the type
7966 of structures created from the LNP depends on the value of PST.
7968 1. If PST is NULL, then this procedure uses the data from the program
7969 to create all necessary symbol tables, and their linetables.
7970 The compilation directory of the file is passed in COMP_DIR,
7971 and must not be NULL.
7973 2. If PST is not NULL, this procedure reads the program to determine
7974 the list of files included by the unit represented by PST, and
7975 builds all the associated partial symbol tables. In this case,
7976 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
7977 is not used to compute the full name of the symtab, and therefore
7978 omitting it when building the partial symtab does not introduce
7979 the potential for inconsistency - a partial symtab and its associated
7980 symbtab having a different fullname -). */
7983 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
7984 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
7986 gdb_byte
*line_ptr
, *extended_end
;
7988 unsigned int bytes_read
, extended_len
;
7989 unsigned char op_code
, extended_op
, adj_opcode
;
7991 struct objfile
*objfile
= cu
->objfile
;
7992 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7993 const int decode_for_pst_p
= (pst
!= NULL
);
7994 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
7996 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7998 line_ptr
= lh
->statement_program_start
;
7999 line_end
= lh
->statement_program_end
;
8001 /* Read the statement sequences until there's nothing left. */
8002 while (line_ptr
< line_end
)
8004 /* state machine registers */
8005 CORE_ADDR address
= 0;
8006 unsigned int file
= 1;
8007 unsigned int line
= 1;
8008 unsigned int column
= 0;
8009 int is_stmt
= lh
->default_is_stmt
;
8010 int basic_block
= 0;
8011 int end_sequence
= 0;
8014 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
8016 /* Start a subfile for the current file of the state machine. */
8017 /* lh->include_dirs and lh->file_names are 0-based, but the
8018 directory and file name numbers in the statement program
8020 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
8024 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8026 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8029 /* Decode the table. */
8030 while (!end_sequence
)
8032 op_code
= read_1_byte (abfd
, line_ptr
);
8034 if (line_ptr
> line_end
)
8036 dwarf2_debug_line_missing_end_sequence_complaint ();
8040 if (op_code
>= lh
->opcode_base
)
8042 /* Special operand. */
8043 adj_opcode
= op_code
- lh
->opcode_base
;
8044 address
+= (adj_opcode
/ lh
->line_range
)
8045 * lh
->minimum_instruction_length
;
8046 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
8047 if (lh
->num_file_names
< file
|| file
== 0)
8048 dwarf2_debug_line_missing_file_complaint ();
8051 lh
->file_names
[file
- 1].included_p
= 1;
8052 if (!decode_for_pst_p
&& is_stmt
)
8054 if (last_subfile
!= current_subfile
)
8056 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8058 record_line (last_subfile
, 0, addr
);
8059 last_subfile
= current_subfile
;
8061 /* Append row to matrix using current values. */
8062 addr
= check_cu_functions (address
, cu
);
8063 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8064 record_line (current_subfile
, line
, addr
);
8069 else switch (op_code
)
8071 case DW_LNS_extended_op
:
8072 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8073 line_ptr
+= bytes_read
;
8074 extended_end
= line_ptr
+ extended_len
;
8075 extended_op
= read_1_byte (abfd
, line_ptr
);
8077 switch (extended_op
)
8079 case DW_LNE_end_sequence
:
8082 case DW_LNE_set_address
:
8083 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
8084 line_ptr
+= bytes_read
;
8085 address
+= baseaddr
;
8087 case DW_LNE_define_file
:
8090 unsigned int dir_index
, mod_time
, length
;
8092 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
8093 line_ptr
+= bytes_read
;
8095 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8096 line_ptr
+= bytes_read
;
8098 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8099 line_ptr
+= bytes_read
;
8101 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8102 line_ptr
+= bytes_read
;
8103 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
8106 case DW_LNE_set_discriminator
:
8107 /* The discriminator is not interesting to the debugger;
8109 line_ptr
= extended_end
;
8112 complaint (&symfile_complaints
,
8113 _("mangled .debug_line section"));
8116 /* Make sure that we parsed the extended op correctly. If e.g.
8117 we expected a different address size than the producer used,
8118 we may have read the wrong number of bytes. */
8119 if (line_ptr
!= extended_end
)
8121 complaint (&symfile_complaints
,
8122 _("mangled .debug_line section"));
8127 if (lh
->num_file_names
< file
|| file
== 0)
8128 dwarf2_debug_line_missing_file_complaint ();
8131 lh
->file_names
[file
- 1].included_p
= 1;
8132 if (!decode_for_pst_p
&& is_stmt
)
8134 if (last_subfile
!= current_subfile
)
8136 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8138 record_line (last_subfile
, 0, addr
);
8139 last_subfile
= current_subfile
;
8141 addr
= check_cu_functions (address
, cu
);
8142 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8143 record_line (current_subfile
, line
, addr
);
8148 case DW_LNS_advance_pc
:
8149 address
+= lh
->minimum_instruction_length
8150 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8151 line_ptr
+= bytes_read
;
8153 case DW_LNS_advance_line
:
8154 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
8155 line_ptr
+= bytes_read
;
8157 case DW_LNS_set_file
:
8159 /* The arrays lh->include_dirs and lh->file_names are
8160 0-based, but the directory and file name numbers in
8161 the statement program are 1-based. */
8162 struct file_entry
*fe
;
8165 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8166 line_ptr
+= bytes_read
;
8167 if (lh
->num_file_names
< file
|| file
== 0)
8168 dwarf2_debug_line_missing_file_complaint ();
8171 fe
= &lh
->file_names
[file
- 1];
8173 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8174 if (!decode_for_pst_p
)
8176 last_subfile
= current_subfile
;
8177 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8182 case DW_LNS_set_column
:
8183 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8184 line_ptr
+= bytes_read
;
8186 case DW_LNS_negate_stmt
:
8187 is_stmt
= (!is_stmt
);
8189 case DW_LNS_set_basic_block
:
8192 /* Add to the address register of the state machine the
8193 address increment value corresponding to special opcode
8194 255. I.e., this value is scaled by the minimum
8195 instruction length since special opcode 255 would have
8196 scaled the the increment. */
8197 case DW_LNS_const_add_pc
:
8198 address
+= (lh
->minimum_instruction_length
8199 * ((255 - lh
->opcode_base
) / lh
->line_range
));
8201 case DW_LNS_fixed_advance_pc
:
8202 address
+= read_2_bytes (abfd
, line_ptr
);
8207 /* Unknown standard opcode, ignore it. */
8210 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
8212 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8213 line_ptr
+= bytes_read
;
8218 if (lh
->num_file_names
< file
|| file
== 0)
8219 dwarf2_debug_line_missing_file_complaint ();
8222 lh
->file_names
[file
- 1].included_p
= 1;
8223 if (!decode_for_pst_p
)
8225 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8226 record_line (current_subfile
, 0, addr
);
8231 if (decode_for_pst_p
)
8235 /* Now that we're done scanning the Line Header Program, we can
8236 create the psymtab of each included file. */
8237 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
8238 if (lh
->file_names
[file_index
].included_p
== 1)
8240 const struct file_entry fe
= lh
->file_names
[file_index
];
8241 char *include_name
= fe
.name
;
8242 char *dir_name
= NULL
;
8243 char *pst_filename
= pst
->filename
;
8246 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
8248 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
8250 include_name
= concat (dir_name
, SLASH_STRING
,
8251 include_name
, (char *)NULL
);
8252 make_cleanup (xfree
, include_name
);
8255 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
8257 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
8258 pst_filename
, (char *)NULL
);
8259 make_cleanup (xfree
, pst_filename
);
8262 if (strcmp (include_name
, pst_filename
) != 0)
8263 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
8268 /* Make sure a symtab is created for every file, even files
8269 which contain only variables (i.e. no code with associated
8273 struct file_entry
*fe
;
8275 for (i
= 0; i
< lh
->num_file_names
; i
++)
8278 fe
= &lh
->file_names
[i
];
8280 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8281 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8283 /* Skip the main file; we don't need it, and it must be
8284 allocated last, so that it will show up before the
8285 non-primary symtabs in the objfile's symtab list. */
8286 if (current_subfile
== first_subfile
)
8289 if (current_subfile
->symtab
== NULL
)
8290 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8292 fe
->symtab
= current_subfile
->symtab
;
8297 /* Start a subfile for DWARF. FILENAME is the name of the file and
8298 DIRNAME the name of the source directory which contains FILENAME
8299 or NULL if not known. COMP_DIR is the compilation directory for the
8300 linetable's compilation unit or NULL if not known.
8301 This routine tries to keep line numbers from identical absolute and
8302 relative file names in a common subfile.
8304 Using the `list' example from the GDB testsuite, which resides in
8305 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8306 of /srcdir/list0.c yields the following debugging information for list0.c:
8308 DW_AT_name: /srcdir/list0.c
8309 DW_AT_comp_dir: /compdir
8310 files.files[0].name: list0.h
8311 files.files[0].dir: /srcdir
8312 files.files[1].name: list0.c
8313 files.files[1].dir: /srcdir
8315 The line number information for list0.c has to end up in a single
8316 subfile, so that `break /srcdir/list0.c:1' works as expected.
8317 start_subfile will ensure that this happens provided that we pass the
8318 concatenation of files.files[1].dir and files.files[1].name as the
8322 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
8326 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8327 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8328 second argument to start_subfile. To be consistent, we do the
8329 same here. In order not to lose the line information directory,
8330 we concatenate it to the filename when it makes sense.
8331 Note that the Dwarf3 standard says (speaking of filenames in line
8332 information): ``The directory index is ignored for file names
8333 that represent full path names''. Thus ignoring dirname in the
8334 `else' branch below isn't an issue. */
8336 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
8337 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
8339 fullname
= filename
;
8341 start_subfile (fullname
, comp_dir
);
8343 if (fullname
!= filename
)
8348 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
8349 struct dwarf2_cu
*cu
)
8351 struct objfile
*objfile
= cu
->objfile
;
8352 struct comp_unit_head
*cu_header
= &cu
->header
;
8354 /* NOTE drow/2003-01-30: There used to be a comment and some special
8355 code here to turn a symbol with DW_AT_external and a
8356 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8357 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8358 with some versions of binutils) where shared libraries could have
8359 relocations against symbols in their debug information - the
8360 minimal symbol would have the right address, but the debug info
8361 would not. It's no longer necessary, because we will explicitly
8362 apply relocations when we read in the debug information now. */
8364 /* A DW_AT_location attribute with no contents indicates that a
8365 variable has been optimized away. */
8366 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
8368 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8372 /* Handle one degenerate form of location expression specially, to
8373 preserve GDB's previous behavior when section offsets are
8374 specified. If this is just a DW_OP_addr then mark this symbol
8377 if (attr_form_is_block (attr
)
8378 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
8379 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
8383 SYMBOL_VALUE_ADDRESS (sym
) =
8384 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
8385 SYMBOL_CLASS (sym
) = LOC_STATIC
;
8386 fixup_symbol_section (sym
, objfile
);
8387 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
8388 SYMBOL_SECTION (sym
));
8392 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8393 expression evaluator, and use LOC_COMPUTED only when necessary
8394 (i.e. when the value of a register or memory location is
8395 referenced, or a thread-local block, etc.). Then again, it might
8396 not be worthwhile. I'm assuming that it isn't unless performance
8397 or memory numbers show me otherwise. */
8399 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
8400 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
8403 /* Given a pointer to a DWARF information entry, figure out if we need
8404 to make a symbol table entry for it, and if so, create a new entry
8405 and return a pointer to it.
8406 If TYPE is NULL, determine symbol type from the die, otherwise
8407 used the passed type. */
8409 static struct symbol
*
8410 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
8412 struct objfile
*objfile
= cu
->objfile
;
8413 struct symbol
*sym
= NULL
;
8415 struct attribute
*attr
= NULL
;
8416 struct attribute
*attr2
= NULL
;
8418 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8420 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8422 name
= dwarf2_name (die
, cu
);
8425 const char *linkagename
;
8427 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
8428 sizeof (struct symbol
));
8429 OBJSTAT (objfile
, n_syms
++);
8430 memset (sym
, 0, sizeof (struct symbol
));
8432 /* Cache this symbol's name and the name's demangled form (if any). */
8433 SYMBOL_LANGUAGE (sym
) = cu
->language
;
8434 linkagename
= dwarf2_physname (name
, die
, cu
);
8435 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
8437 /* Default assumptions.
8438 Use the passed type or decode it from the die. */
8439 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8440 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8442 SYMBOL_TYPE (sym
) = type
;
8444 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
8445 attr
= dwarf2_attr (die
,
8446 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
8450 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
8453 attr
= dwarf2_attr (die
,
8454 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
8458 int file_index
= DW_UNSND (attr
);
8459 if (cu
->line_header
== NULL
8460 || file_index
> cu
->line_header
->num_file_names
)
8461 complaint (&symfile_complaints
,
8462 _("file index out of range"));
8463 else if (file_index
> 0)
8465 struct file_entry
*fe
;
8466 fe
= &cu
->line_header
->file_names
[file_index
- 1];
8467 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
8474 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8477 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
8479 SYMBOL_CLASS (sym
) = LOC_LABEL
;
8481 case DW_TAG_subprogram
:
8482 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8484 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8485 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8486 if ((attr2
&& (DW_UNSND (attr2
) != 0))
8487 || cu
->language
== language_ada
)
8489 /* Subprograms marked external are stored as a global symbol.
8490 Ada subprograms, whether marked external or not, are always
8491 stored as a global symbol, because we want to be able to
8492 access them globally. For instance, we want to be able
8493 to break on a nested subprogram without having to
8494 specify the context. */
8495 add_symbol_to_list (sym
, &global_symbols
);
8499 add_symbol_to_list (sym
, cu
->list_in_scope
);
8502 case DW_TAG_inlined_subroutine
:
8503 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8505 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8506 SYMBOL_INLINED (sym
) = 1;
8507 /* Do not add the symbol to any lists. It will be found via
8508 BLOCK_FUNCTION from the blockvector. */
8510 case DW_TAG_variable
:
8511 /* Compilation with minimal debug info may result in variables
8512 with missing type entries. Change the misleading `void' type
8513 to something sensible. */
8514 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
8516 = objfile_type (objfile
)->nodebug_data_symbol
;
8518 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8521 dwarf2_const_value (attr
, sym
, cu
);
8522 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8523 if (attr2
&& (DW_UNSND (attr2
) != 0))
8524 add_symbol_to_list (sym
, &global_symbols
);
8526 add_symbol_to_list (sym
, cu
->list_in_scope
);
8529 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8532 var_decode_location (attr
, sym
, cu
);
8533 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8534 if (attr2
&& (DW_UNSND (attr2
) != 0))
8536 struct pending
**list_to_add
;
8538 /* A variable with DW_AT_external is never static,
8539 but it may be block-scoped. */
8540 list_to_add
= (cu
->list_in_scope
== &file_symbols
8541 ? &global_symbols
: cu
->list_in_scope
);
8542 add_symbol_to_list (sym
, list_to_add
);
8545 add_symbol_to_list (sym
, cu
->list_in_scope
);
8549 /* We do not know the address of this symbol.
8550 If it is an external symbol and we have type information
8551 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8552 The address of the variable will then be determined from
8553 the minimal symbol table whenever the variable is
8555 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8556 if (attr2
&& (DW_UNSND (attr2
) != 0)
8557 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
8559 struct pending
**list_to_add
;
8561 /* A variable with DW_AT_external is never static, but it
8562 may be block-scoped. */
8563 list_to_add
= (cu
->list_in_scope
== &file_symbols
8564 ? &global_symbols
: cu
->list_in_scope
);
8566 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8567 add_symbol_to_list (sym
, list_to_add
);
8569 else if (!die_is_declaration (die
, cu
))
8571 /* Use the default LOC_OPTIMIZED_OUT class. */
8572 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
8573 add_symbol_to_list (sym
, cu
->list_in_scope
);
8577 case DW_TAG_formal_parameter
:
8578 /* If we are inside a function, mark this as an argument. If
8579 not, we might be looking at an argument to an inlined function
8580 when we do not have enough information to show inlined frames;
8581 pretend it's a local variable in that case so that the user can
8583 if (context_stack_depth
> 0
8584 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
8585 SYMBOL_IS_ARGUMENT (sym
) = 1;
8586 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8589 var_decode_location (attr
, sym
, cu
);
8591 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8594 dwarf2_const_value (attr
, sym
, cu
);
8596 add_symbol_to_list (sym
, cu
->list_in_scope
);
8598 case DW_TAG_unspecified_parameters
:
8599 /* From varargs functions; gdb doesn't seem to have any
8600 interest in this information, so just ignore it for now.
8603 case DW_TAG_class_type
:
8604 case DW_TAG_interface_type
:
8605 case DW_TAG_structure_type
:
8606 case DW_TAG_union_type
:
8607 case DW_TAG_set_type
:
8608 case DW_TAG_enumeration_type
:
8609 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8610 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8612 /* Make sure that the symbol includes appropriate enclosing
8613 classes/namespaces in its name. These are calculated in
8614 read_structure_type, and the correct name is saved in
8617 if (cu
->language
== language_cplus
8618 || cu
->language
== language_java
)
8620 struct type
*type
= SYMBOL_TYPE (sym
);
8622 if (TYPE_TAG_NAME (type
) != NULL
)
8624 /* FIXME: carlton/2003-11-10: Should this use
8625 SYMBOL_SET_NAMES instead? (The same problem also
8626 arises further down in this function.) */
8627 /* The type's name is already allocated along with
8628 this objfile, so we don't need to duplicate it
8630 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
8635 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8636 really ever be static objects: otherwise, if you try
8637 to, say, break of a class's method and you're in a file
8638 which doesn't mention that class, it won't work unless
8639 the check for all static symbols in lookup_symbol_aux
8640 saves you. See the OtherFileClass tests in
8641 gdb.c++/namespace.exp. */
8643 struct pending
**list_to_add
;
8645 list_to_add
= (cu
->list_in_scope
== &file_symbols
8646 && (cu
->language
== language_cplus
8647 || cu
->language
== language_java
)
8648 ? &global_symbols
: cu
->list_in_scope
);
8650 add_symbol_to_list (sym
, list_to_add
);
8652 /* The semantics of C++ state that "struct foo { ... }" also
8653 defines a typedef for "foo". A Java class declaration also
8654 defines a typedef for the class. */
8655 if (cu
->language
== language_cplus
8656 || cu
->language
== language_java
8657 || cu
->language
== language_ada
)
8659 /* The symbol's name is already allocated along with
8660 this objfile, so we don't need to duplicate it for
8662 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
8663 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
8667 case DW_TAG_typedef
:
8668 SYMBOL_LINKAGE_NAME (sym
)
8669 = (char *) dwarf2_full_name (name
, die
, cu
);
8670 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8671 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8672 add_symbol_to_list (sym
, cu
->list_in_scope
);
8674 case DW_TAG_base_type
:
8675 case DW_TAG_subrange_type
:
8676 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8677 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8678 add_symbol_to_list (sym
, cu
->list_in_scope
);
8680 case DW_TAG_enumerator
:
8681 SYMBOL_LINKAGE_NAME (sym
)
8682 = (char *) dwarf2_full_name (name
, die
, cu
);
8683 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8686 dwarf2_const_value (attr
, sym
, cu
);
8689 /* NOTE: carlton/2003-11-10: See comment above in the
8690 DW_TAG_class_type, etc. block. */
8692 struct pending
**list_to_add
;
8694 list_to_add
= (cu
->list_in_scope
== &file_symbols
8695 && (cu
->language
== language_cplus
8696 || cu
->language
== language_java
)
8697 ? &global_symbols
: cu
->list_in_scope
);
8699 add_symbol_to_list (sym
, list_to_add
);
8702 case DW_TAG_namespace
:
8703 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8704 add_symbol_to_list (sym
, &global_symbols
);
8707 /* Not a tag we recognize. Hopefully we aren't processing
8708 trash data, but since we must specifically ignore things
8709 we don't recognize, there is nothing else we should do at
8711 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
8712 dwarf_tag_name (die
->tag
));
8716 /* For the benefit of old versions of GCC, check for anonymous
8717 namespaces based on the demangled name. */
8718 if (!processing_has_namespace_info
8719 && cu
->language
== language_cplus
)
8720 cp_scan_for_anonymous_namespaces (sym
);
8725 /* Copy constant value from an attribute to a symbol. */
8728 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
8729 struct dwarf2_cu
*cu
)
8731 struct objfile
*objfile
= cu
->objfile
;
8732 struct comp_unit_head
*cu_header
= &cu
->header
;
8733 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
8734 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
8735 struct dwarf_block
*blk
;
8740 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
8741 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8742 cu_header
->addr_size
,
8743 TYPE_LENGTH (SYMBOL_TYPE
8745 SYMBOL_VALUE_BYTES (sym
) =
8746 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
8747 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8748 it's body - store_unsigned_integer. */
8749 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
8750 byte_order
, DW_ADDR (attr
));
8751 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8753 case DW_FORM_string
:
8755 /* DW_STRING is already allocated on the obstack, point directly
8757 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
8758 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8760 case DW_FORM_block1
:
8761 case DW_FORM_block2
:
8762 case DW_FORM_block4
:
8764 blk
= DW_BLOCK (attr
);
8765 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
8766 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8768 TYPE_LENGTH (SYMBOL_TYPE
8770 SYMBOL_VALUE_BYTES (sym
) =
8771 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
8772 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
8773 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8776 /* The DW_AT_const_value attributes are supposed to carry the
8777 symbol's value "represented as it would be on the target
8778 architecture." By the time we get here, it's already been
8779 converted to host endianness, so we just need to sign- or
8780 zero-extend it as appropriate. */
8782 dwarf2_const_value_data (attr
, sym
, 8);
8785 dwarf2_const_value_data (attr
, sym
, 16);
8788 dwarf2_const_value_data (attr
, sym
, 32);
8791 dwarf2_const_value_data (attr
, sym
, 64);
8795 SYMBOL_VALUE (sym
) = DW_SND (attr
);
8796 SYMBOL_CLASS (sym
) = LOC_CONST
;
8800 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
8801 SYMBOL_CLASS (sym
) = LOC_CONST
;
8805 complaint (&symfile_complaints
,
8806 _("unsupported const value attribute form: '%s'"),
8807 dwarf_form_name (attr
->form
));
8808 SYMBOL_VALUE (sym
) = 0;
8809 SYMBOL_CLASS (sym
) = LOC_CONST
;
8815 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8816 or zero-extend it as appropriate for the symbol's type. */
8818 dwarf2_const_value_data (struct attribute
*attr
,
8822 LONGEST l
= DW_UNSND (attr
);
8824 if (bits
< sizeof (l
) * 8)
8826 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
8827 l
&= ((LONGEST
) 1 << bits
) - 1;
8829 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
8832 SYMBOL_VALUE (sym
) = l
;
8833 SYMBOL_CLASS (sym
) = LOC_CONST
;
8837 /* Return the type of the die in question using its DW_AT_type attribute. */
8839 static struct type
*
8840 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8843 struct attribute
*type_attr
;
8844 struct die_info
*type_die
;
8846 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
8849 /* A missing DW_AT_type represents a void type. */
8850 return objfile_type (cu
->objfile
)->builtin_void
;
8853 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8855 type
= tag_type_to_type (type_die
, cu
);
8858 dump_die_for_error (type_die
);
8859 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8865 /* True iff CU's producer generates GNAT Ada auxiliary information
8866 that allows to find parallel types through that information instead
8867 of having to do expensive parallel lookups by type name. */
8870 need_gnat_info (struct dwarf2_cu
*cu
)
8872 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
8873 of GNAT produces this auxiliary information, without any indication
8874 that it is produced. Part of enhancing the FSF version of GNAT
8875 to produce that information will be to put in place an indicator
8876 that we can use in order to determine whether the descriptive type
8877 info is available or not. One suggestion that has been made is
8878 to use a new attribute, attached to the CU die. For now, assume
8879 that the descriptive type info is not available. */
8884 /* Return the auxiliary type of the die in question using its
8885 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
8886 attribute is not present. */
8888 static struct type
*
8889 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8892 struct attribute
*type_attr
;
8893 struct die_info
*type_die
;
8895 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
8899 type_die
= follow_die_ref (die
, type_attr
, &cu
);
8900 type
= tag_type_to_type (type_die
, cu
);
8903 dump_die_for_error (type_die
);
8904 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8910 /* If DIE has a descriptive_type attribute, then set the TYPE's
8911 descriptive type accordingly. */
8914 set_descriptive_type (struct type
*type
, struct die_info
*die
,
8915 struct dwarf2_cu
*cu
)
8917 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
8919 if (descriptive_type
)
8921 ALLOCATE_GNAT_AUX_TYPE (type
);
8922 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
8926 /* Return the containing type of the die in question using its
8927 DW_AT_containing_type attribute. */
8929 static struct type
*
8930 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8932 struct type
*type
= NULL
;
8933 struct attribute
*type_attr
;
8934 struct die_info
*type_die
= NULL
;
8936 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
8939 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8940 type
= tag_type_to_type (type_die
, cu
);
8945 dump_die_for_error (type_die
);
8946 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
8952 static struct type
*
8953 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8955 struct type
*this_type
;
8957 this_type
= read_type_die (die
, cu
);
8960 dump_die_for_error (die
);
8961 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
8967 static struct type
*
8968 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8970 struct type
*this_type
;
8972 this_type
= get_die_type (die
, cu
);
8978 case DW_TAG_class_type
:
8979 case DW_TAG_interface_type
:
8980 case DW_TAG_structure_type
:
8981 case DW_TAG_union_type
:
8982 this_type
= read_structure_type (die
, cu
);
8984 case DW_TAG_enumeration_type
:
8985 this_type
= read_enumeration_type (die
, cu
);
8987 case DW_TAG_subprogram
:
8988 case DW_TAG_subroutine_type
:
8989 case DW_TAG_inlined_subroutine
:
8990 this_type
= read_subroutine_type (die
, cu
);
8992 case DW_TAG_array_type
:
8993 this_type
= read_array_type (die
, cu
);
8995 case DW_TAG_set_type
:
8996 this_type
= read_set_type (die
, cu
);
8998 case DW_TAG_pointer_type
:
8999 this_type
= read_tag_pointer_type (die
, cu
);
9001 case DW_TAG_ptr_to_member_type
:
9002 this_type
= read_tag_ptr_to_member_type (die
, cu
);
9004 case DW_TAG_reference_type
:
9005 this_type
= read_tag_reference_type (die
, cu
);
9007 case DW_TAG_const_type
:
9008 this_type
= read_tag_const_type (die
, cu
);
9010 case DW_TAG_volatile_type
:
9011 this_type
= read_tag_volatile_type (die
, cu
);
9013 case DW_TAG_string_type
:
9014 this_type
= read_tag_string_type (die
, cu
);
9016 case DW_TAG_typedef
:
9017 this_type
= read_typedef (die
, cu
);
9019 case DW_TAG_subrange_type
:
9020 this_type
= read_subrange_type (die
, cu
);
9022 case DW_TAG_base_type
:
9023 this_type
= read_base_type (die
, cu
);
9025 case DW_TAG_unspecified_type
:
9026 this_type
= read_unspecified_type (die
, cu
);
9028 case DW_TAG_namespace
:
9029 this_type
= read_namespace_type (die
, cu
);
9032 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
9033 dwarf_tag_name (die
->tag
));
9040 /* Return the name of the namespace/class that DIE is defined within,
9041 or "" if we can't tell. The caller should not xfree the result.
9043 For example, if we're within the method foo() in the following
9053 then determine_prefix on foo's die will return "N::C". */
9056 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
9058 struct die_info
*parent
, *spec_die
;
9059 struct dwarf2_cu
*spec_cu
;
9060 struct type
*parent_type
;
9062 if (cu
->language
!= language_cplus
9063 && cu
->language
!= language_java
)
9066 /* We have to be careful in the presence of DW_AT_specification.
9067 For example, with GCC 3.4, given the code
9071 // Definition of N::foo.
9075 then we'll have a tree of DIEs like this:
9077 1: DW_TAG_compile_unit
9078 2: DW_TAG_namespace // N
9079 3: DW_TAG_subprogram // declaration of N::foo
9080 4: DW_TAG_subprogram // definition of N::foo
9081 DW_AT_specification // refers to die #3
9083 Thus, when processing die #4, we have to pretend that we're in
9084 the context of its DW_AT_specification, namely the contex of die
9087 spec_die
= die_specification (die
, &spec_cu
);
9088 if (spec_die
== NULL
)
9089 parent
= die
->parent
;
9092 parent
= spec_die
->parent
;
9099 switch (parent
->tag
)
9101 case DW_TAG_namespace
:
9102 parent_type
= read_type_die (parent
, cu
);
9103 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
9104 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
9105 Work around this problem here. */
9106 if (cu
->language
== language_cplus
9107 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
9109 /* We give a name to even anonymous namespaces. */
9110 return TYPE_TAG_NAME (parent_type
);
9111 case DW_TAG_class_type
:
9112 case DW_TAG_interface_type
:
9113 case DW_TAG_structure_type
:
9114 case DW_TAG_union_type
:
9115 parent_type
= read_type_die (parent
, cu
);
9116 if (TYPE_TAG_NAME (parent_type
) != NULL
)
9117 return TYPE_TAG_NAME (parent_type
);
9119 /* An anonymous structure is only allowed non-static data
9120 members; no typedefs, no member functions, et cetera.
9121 So it does not need a prefix. */
9124 return determine_prefix (parent
, cu
);
9128 /* Return a newly-allocated string formed by concatenating PREFIX and
9129 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
9130 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
9131 perform an obconcat, otherwise allocate storage for the result. The CU argument
9132 is used to determine the language and hence, the appropriate separator. */
9134 #define MAX_SEP_LEN 2 /* sizeof ("::") */
9137 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
9138 struct dwarf2_cu
*cu
)
9142 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
9144 else if (cu
->language
== language_java
)
9156 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
9157 strcpy (retval
, prefix
);
9158 strcat (retval
, sep
);
9159 strcat (retval
, suffix
);
9164 /* We have an obstack. */
9165 return obconcat (obs
, prefix
, sep
, suffix
);
9169 /* Return sibling of die, NULL if no sibling. */
9171 static struct die_info
*
9172 sibling_die (struct die_info
*die
)
9174 return die
->sibling
;
9177 /* Get name of a die, return NULL if not found. */
9180 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
9181 struct obstack
*obstack
)
9183 if (name
&& cu
->language
== language_cplus
)
9185 char *canon_name
= cp_canonicalize_string (name
);
9187 if (canon_name
!= NULL
)
9189 if (strcmp (canon_name
, name
) != 0)
9190 name
= obsavestring (canon_name
, strlen (canon_name
),
9199 /* Get name of a die, return NULL if not found. */
9202 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9204 struct attribute
*attr
;
9206 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9207 if (!attr
|| !DW_STRING (attr
))
9212 case DW_TAG_compile_unit
:
9213 /* Compilation units have a DW_AT_name that is a filename, not
9214 a source language identifier. */
9215 case DW_TAG_enumeration_type
:
9216 case DW_TAG_enumerator
:
9217 /* These tags always have simple identifiers already; no need
9218 to canonicalize them. */
9219 return DW_STRING (attr
);
9221 case DW_TAG_subprogram
:
9222 /* Java constructors will all be named "<init>", so return
9223 the class name when we see this special case. */
9224 if (cu
->language
== language_java
9225 && DW_STRING (attr
) != NULL
9226 && strcmp (DW_STRING (attr
), "<init>") == 0)
9228 struct dwarf2_cu
*spec_cu
= cu
;
9229 struct die_info
*spec_die
;
9231 /* GCJ will output '<init>' for Java constructor names.
9232 For this special case, return the name of the parent class. */
9234 /* GCJ may output suprogram DIEs with AT_specification set.
9235 If so, use the name of the specified DIE. */
9236 spec_die
= die_specification (die
, &spec_cu
);
9237 if (spec_die
!= NULL
)
9238 return dwarf2_name (spec_die
, spec_cu
);
9243 if (die
->tag
== DW_TAG_class_type
)
9244 return dwarf2_name (die
, cu
);
9246 while (die
->tag
!= DW_TAG_compile_unit
);
9250 case DW_TAG_class_type
:
9251 case DW_TAG_interface_type
:
9252 case DW_TAG_structure_type
:
9253 case DW_TAG_union_type
:
9254 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
9255 structures or unions. These were of the form "._%d" in GCC 4.1,
9256 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
9257 and GCC 4.4. We work around this problem by ignoring these. */
9258 if (strncmp (DW_STRING (attr
), "._", 2) == 0
9259 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
9267 if (!DW_STRING_IS_CANONICAL (attr
))
9270 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
9271 &cu
->objfile
->objfile_obstack
);
9272 DW_STRING_IS_CANONICAL (attr
) = 1;
9274 return DW_STRING (attr
);
9277 /* Return the die that this die in an extension of, or NULL if there
9278 is none. *EXT_CU is the CU containing DIE on input, and the CU
9279 containing the return value on output. */
9281 static struct die_info
*
9282 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
9284 struct attribute
*attr
;
9286 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
9290 return follow_die_ref (die
, attr
, ext_cu
);
9293 /* Convert a DIE tag into its string name. */
9296 dwarf_tag_name (unsigned tag
)
9300 case DW_TAG_padding
:
9301 return "DW_TAG_padding";
9302 case DW_TAG_array_type
:
9303 return "DW_TAG_array_type";
9304 case DW_TAG_class_type
:
9305 return "DW_TAG_class_type";
9306 case DW_TAG_entry_point
:
9307 return "DW_TAG_entry_point";
9308 case DW_TAG_enumeration_type
:
9309 return "DW_TAG_enumeration_type";
9310 case DW_TAG_formal_parameter
:
9311 return "DW_TAG_formal_parameter";
9312 case DW_TAG_imported_declaration
:
9313 return "DW_TAG_imported_declaration";
9315 return "DW_TAG_label";
9316 case DW_TAG_lexical_block
:
9317 return "DW_TAG_lexical_block";
9319 return "DW_TAG_member";
9320 case DW_TAG_pointer_type
:
9321 return "DW_TAG_pointer_type";
9322 case DW_TAG_reference_type
:
9323 return "DW_TAG_reference_type";
9324 case DW_TAG_compile_unit
:
9325 return "DW_TAG_compile_unit";
9326 case DW_TAG_string_type
:
9327 return "DW_TAG_string_type";
9328 case DW_TAG_structure_type
:
9329 return "DW_TAG_structure_type";
9330 case DW_TAG_subroutine_type
:
9331 return "DW_TAG_subroutine_type";
9332 case DW_TAG_typedef
:
9333 return "DW_TAG_typedef";
9334 case DW_TAG_union_type
:
9335 return "DW_TAG_union_type";
9336 case DW_TAG_unspecified_parameters
:
9337 return "DW_TAG_unspecified_parameters";
9338 case DW_TAG_variant
:
9339 return "DW_TAG_variant";
9340 case DW_TAG_common_block
:
9341 return "DW_TAG_common_block";
9342 case DW_TAG_common_inclusion
:
9343 return "DW_TAG_common_inclusion";
9344 case DW_TAG_inheritance
:
9345 return "DW_TAG_inheritance";
9346 case DW_TAG_inlined_subroutine
:
9347 return "DW_TAG_inlined_subroutine";
9349 return "DW_TAG_module";
9350 case DW_TAG_ptr_to_member_type
:
9351 return "DW_TAG_ptr_to_member_type";
9352 case DW_TAG_set_type
:
9353 return "DW_TAG_set_type";
9354 case DW_TAG_subrange_type
:
9355 return "DW_TAG_subrange_type";
9356 case DW_TAG_with_stmt
:
9357 return "DW_TAG_with_stmt";
9358 case DW_TAG_access_declaration
:
9359 return "DW_TAG_access_declaration";
9360 case DW_TAG_base_type
:
9361 return "DW_TAG_base_type";
9362 case DW_TAG_catch_block
:
9363 return "DW_TAG_catch_block";
9364 case DW_TAG_const_type
:
9365 return "DW_TAG_const_type";
9366 case DW_TAG_constant
:
9367 return "DW_TAG_constant";
9368 case DW_TAG_enumerator
:
9369 return "DW_TAG_enumerator";
9370 case DW_TAG_file_type
:
9371 return "DW_TAG_file_type";
9373 return "DW_TAG_friend";
9374 case DW_TAG_namelist
:
9375 return "DW_TAG_namelist";
9376 case DW_TAG_namelist_item
:
9377 return "DW_TAG_namelist_item";
9378 case DW_TAG_packed_type
:
9379 return "DW_TAG_packed_type";
9380 case DW_TAG_subprogram
:
9381 return "DW_TAG_subprogram";
9382 case DW_TAG_template_type_param
:
9383 return "DW_TAG_template_type_param";
9384 case DW_TAG_template_value_param
:
9385 return "DW_TAG_template_value_param";
9386 case DW_TAG_thrown_type
:
9387 return "DW_TAG_thrown_type";
9388 case DW_TAG_try_block
:
9389 return "DW_TAG_try_block";
9390 case DW_TAG_variant_part
:
9391 return "DW_TAG_variant_part";
9392 case DW_TAG_variable
:
9393 return "DW_TAG_variable";
9394 case DW_TAG_volatile_type
:
9395 return "DW_TAG_volatile_type";
9396 case DW_TAG_dwarf_procedure
:
9397 return "DW_TAG_dwarf_procedure";
9398 case DW_TAG_restrict_type
:
9399 return "DW_TAG_restrict_type";
9400 case DW_TAG_interface_type
:
9401 return "DW_TAG_interface_type";
9402 case DW_TAG_namespace
:
9403 return "DW_TAG_namespace";
9404 case DW_TAG_imported_module
:
9405 return "DW_TAG_imported_module";
9406 case DW_TAG_unspecified_type
:
9407 return "DW_TAG_unspecified_type";
9408 case DW_TAG_partial_unit
:
9409 return "DW_TAG_partial_unit";
9410 case DW_TAG_imported_unit
:
9411 return "DW_TAG_imported_unit";
9412 case DW_TAG_condition
:
9413 return "DW_TAG_condition";
9414 case DW_TAG_shared_type
:
9415 return "DW_TAG_shared_type";
9416 case DW_TAG_type_unit
:
9417 return "DW_TAG_type_unit";
9418 case DW_TAG_MIPS_loop
:
9419 return "DW_TAG_MIPS_loop";
9420 case DW_TAG_HP_array_descriptor
:
9421 return "DW_TAG_HP_array_descriptor";
9422 case DW_TAG_format_label
:
9423 return "DW_TAG_format_label";
9424 case DW_TAG_function_template
:
9425 return "DW_TAG_function_template";
9426 case DW_TAG_class_template
:
9427 return "DW_TAG_class_template";
9428 case DW_TAG_GNU_BINCL
:
9429 return "DW_TAG_GNU_BINCL";
9430 case DW_TAG_GNU_EINCL
:
9431 return "DW_TAG_GNU_EINCL";
9432 case DW_TAG_upc_shared_type
:
9433 return "DW_TAG_upc_shared_type";
9434 case DW_TAG_upc_strict_type
:
9435 return "DW_TAG_upc_strict_type";
9436 case DW_TAG_upc_relaxed_type
:
9437 return "DW_TAG_upc_relaxed_type";
9438 case DW_TAG_PGI_kanji_type
:
9439 return "DW_TAG_PGI_kanji_type";
9440 case DW_TAG_PGI_interface_block
:
9441 return "DW_TAG_PGI_interface_block";
9443 return "DW_TAG_<unknown>";
9447 /* Convert a DWARF attribute code into its string name. */
9450 dwarf_attr_name (unsigned attr
)
9455 return "DW_AT_sibling";
9456 case DW_AT_location
:
9457 return "DW_AT_location";
9459 return "DW_AT_name";
9460 case DW_AT_ordering
:
9461 return "DW_AT_ordering";
9462 case DW_AT_subscr_data
:
9463 return "DW_AT_subscr_data";
9464 case DW_AT_byte_size
:
9465 return "DW_AT_byte_size";
9466 case DW_AT_bit_offset
:
9467 return "DW_AT_bit_offset";
9468 case DW_AT_bit_size
:
9469 return "DW_AT_bit_size";
9470 case DW_AT_element_list
:
9471 return "DW_AT_element_list";
9472 case DW_AT_stmt_list
:
9473 return "DW_AT_stmt_list";
9475 return "DW_AT_low_pc";
9477 return "DW_AT_high_pc";
9478 case DW_AT_language
:
9479 return "DW_AT_language";
9481 return "DW_AT_member";
9483 return "DW_AT_discr";
9484 case DW_AT_discr_value
:
9485 return "DW_AT_discr_value";
9486 case DW_AT_visibility
:
9487 return "DW_AT_visibility";
9489 return "DW_AT_import";
9490 case DW_AT_string_length
:
9491 return "DW_AT_string_length";
9492 case DW_AT_common_reference
:
9493 return "DW_AT_common_reference";
9494 case DW_AT_comp_dir
:
9495 return "DW_AT_comp_dir";
9496 case DW_AT_const_value
:
9497 return "DW_AT_const_value";
9498 case DW_AT_containing_type
:
9499 return "DW_AT_containing_type";
9500 case DW_AT_default_value
:
9501 return "DW_AT_default_value";
9503 return "DW_AT_inline";
9504 case DW_AT_is_optional
:
9505 return "DW_AT_is_optional";
9506 case DW_AT_lower_bound
:
9507 return "DW_AT_lower_bound";
9508 case DW_AT_producer
:
9509 return "DW_AT_producer";
9510 case DW_AT_prototyped
:
9511 return "DW_AT_prototyped";
9512 case DW_AT_return_addr
:
9513 return "DW_AT_return_addr";
9514 case DW_AT_start_scope
:
9515 return "DW_AT_start_scope";
9516 case DW_AT_bit_stride
:
9517 return "DW_AT_bit_stride";
9518 case DW_AT_upper_bound
:
9519 return "DW_AT_upper_bound";
9520 case DW_AT_abstract_origin
:
9521 return "DW_AT_abstract_origin";
9522 case DW_AT_accessibility
:
9523 return "DW_AT_accessibility";
9524 case DW_AT_address_class
:
9525 return "DW_AT_address_class";
9526 case DW_AT_artificial
:
9527 return "DW_AT_artificial";
9528 case DW_AT_base_types
:
9529 return "DW_AT_base_types";
9530 case DW_AT_calling_convention
:
9531 return "DW_AT_calling_convention";
9533 return "DW_AT_count";
9534 case DW_AT_data_member_location
:
9535 return "DW_AT_data_member_location";
9536 case DW_AT_decl_column
:
9537 return "DW_AT_decl_column";
9538 case DW_AT_decl_file
:
9539 return "DW_AT_decl_file";
9540 case DW_AT_decl_line
:
9541 return "DW_AT_decl_line";
9542 case DW_AT_declaration
:
9543 return "DW_AT_declaration";
9544 case DW_AT_discr_list
:
9545 return "DW_AT_discr_list";
9546 case DW_AT_encoding
:
9547 return "DW_AT_encoding";
9548 case DW_AT_external
:
9549 return "DW_AT_external";
9550 case DW_AT_frame_base
:
9551 return "DW_AT_frame_base";
9553 return "DW_AT_friend";
9554 case DW_AT_identifier_case
:
9555 return "DW_AT_identifier_case";
9556 case DW_AT_macro_info
:
9557 return "DW_AT_macro_info";
9558 case DW_AT_namelist_items
:
9559 return "DW_AT_namelist_items";
9560 case DW_AT_priority
:
9561 return "DW_AT_priority";
9563 return "DW_AT_segment";
9564 case DW_AT_specification
:
9565 return "DW_AT_specification";
9566 case DW_AT_static_link
:
9567 return "DW_AT_static_link";
9569 return "DW_AT_type";
9570 case DW_AT_use_location
:
9571 return "DW_AT_use_location";
9572 case DW_AT_variable_parameter
:
9573 return "DW_AT_variable_parameter";
9574 case DW_AT_virtuality
:
9575 return "DW_AT_virtuality";
9576 case DW_AT_vtable_elem_location
:
9577 return "DW_AT_vtable_elem_location";
9578 /* DWARF 3 values. */
9579 case DW_AT_allocated
:
9580 return "DW_AT_allocated";
9581 case DW_AT_associated
:
9582 return "DW_AT_associated";
9583 case DW_AT_data_location
:
9584 return "DW_AT_data_location";
9585 case DW_AT_byte_stride
:
9586 return "DW_AT_byte_stride";
9587 case DW_AT_entry_pc
:
9588 return "DW_AT_entry_pc";
9589 case DW_AT_use_UTF8
:
9590 return "DW_AT_use_UTF8";
9591 case DW_AT_extension
:
9592 return "DW_AT_extension";
9594 return "DW_AT_ranges";
9595 case DW_AT_trampoline
:
9596 return "DW_AT_trampoline";
9597 case DW_AT_call_column
:
9598 return "DW_AT_call_column";
9599 case DW_AT_call_file
:
9600 return "DW_AT_call_file";
9601 case DW_AT_call_line
:
9602 return "DW_AT_call_line";
9603 case DW_AT_description
:
9604 return "DW_AT_description";
9605 case DW_AT_binary_scale
:
9606 return "DW_AT_binary_scale";
9607 case DW_AT_decimal_scale
:
9608 return "DW_AT_decimal_scale";
9610 return "DW_AT_small";
9611 case DW_AT_decimal_sign
:
9612 return "DW_AT_decimal_sign";
9613 case DW_AT_digit_count
:
9614 return "DW_AT_digit_count";
9615 case DW_AT_picture_string
:
9616 return "DW_AT_picture_string";
9618 return "DW_AT_mutable";
9619 case DW_AT_threads_scaled
:
9620 return "DW_AT_threads_scaled";
9621 case DW_AT_explicit
:
9622 return "DW_AT_explicit";
9623 case DW_AT_object_pointer
:
9624 return "DW_AT_object_pointer";
9625 case DW_AT_endianity
:
9626 return "DW_AT_endianity";
9627 case DW_AT_elemental
:
9628 return "DW_AT_elemental";
9630 return "DW_AT_pure";
9631 case DW_AT_recursive
:
9632 return "DW_AT_recursive";
9633 /* DWARF 4 values. */
9634 case DW_AT_signature
:
9635 return "DW_AT_signature";
9636 /* SGI/MIPS extensions. */
9637 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9638 case DW_AT_MIPS_fde
:
9639 return "DW_AT_MIPS_fde";
9641 case DW_AT_MIPS_loop_begin
:
9642 return "DW_AT_MIPS_loop_begin";
9643 case DW_AT_MIPS_tail_loop_begin
:
9644 return "DW_AT_MIPS_tail_loop_begin";
9645 case DW_AT_MIPS_epilog_begin
:
9646 return "DW_AT_MIPS_epilog_begin";
9647 case DW_AT_MIPS_loop_unroll_factor
:
9648 return "DW_AT_MIPS_loop_unroll_factor";
9649 case DW_AT_MIPS_software_pipeline_depth
:
9650 return "DW_AT_MIPS_software_pipeline_depth";
9651 case DW_AT_MIPS_linkage_name
:
9652 return "DW_AT_MIPS_linkage_name";
9653 case DW_AT_MIPS_stride
:
9654 return "DW_AT_MIPS_stride";
9655 case DW_AT_MIPS_abstract_name
:
9656 return "DW_AT_MIPS_abstract_name";
9657 case DW_AT_MIPS_clone_origin
:
9658 return "DW_AT_MIPS_clone_origin";
9659 case DW_AT_MIPS_has_inlines
:
9660 return "DW_AT_MIPS_has_inlines";
9661 /* HP extensions. */
9662 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9663 case DW_AT_HP_block_index
:
9664 return "DW_AT_HP_block_index";
9666 case DW_AT_HP_unmodifiable
:
9667 return "DW_AT_HP_unmodifiable";
9668 case DW_AT_HP_actuals_stmt_list
:
9669 return "DW_AT_HP_actuals_stmt_list";
9670 case DW_AT_HP_proc_per_section
:
9671 return "DW_AT_HP_proc_per_section";
9672 case DW_AT_HP_raw_data_ptr
:
9673 return "DW_AT_HP_raw_data_ptr";
9674 case DW_AT_HP_pass_by_reference
:
9675 return "DW_AT_HP_pass_by_reference";
9676 case DW_AT_HP_opt_level
:
9677 return "DW_AT_HP_opt_level";
9678 case DW_AT_HP_prof_version_id
:
9679 return "DW_AT_HP_prof_version_id";
9680 case DW_AT_HP_opt_flags
:
9681 return "DW_AT_HP_opt_flags";
9682 case DW_AT_HP_cold_region_low_pc
:
9683 return "DW_AT_HP_cold_region_low_pc";
9684 case DW_AT_HP_cold_region_high_pc
:
9685 return "DW_AT_HP_cold_region_high_pc";
9686 case DW_AT_HP_all_variables_modifiable
:
9687 return "DW_AT_HP_all_variables_modifiable";
9688 case DW_AT_HP_linkage_name
:
9689 return "DW_AT_HP_linkage_name";
9690 case DW_AT_HP_prof_flags
:
9691 return "DW_AT_HP_prof_flags";
9692 /* GNU extensions. */
9693 case DW_AT_sf_names
:
9694 return "DW_AT_sf_names";
9695 case DW_AT_src_info
:
9696 return "DW_AT_src_info";
9697 case DW_AT_mac_info
:
9698 return "DW_AT_mac_info";
9699 case DW_AT_src_coords
:
9700 return "DW_AT_src_coords";
9701 case DW_AT_body_begin
:
9702 return "DW_AT_body_begin";
9703 case DW_AT_body_end
:
9704 return "DW_AT_body_end";
9705 case DW_AT_GNU_vector
:
9706 return "DW_AT_GNU_vector";
9707 /* VMS extensions. */
9708 case DW_AT_VMS_rtnbeg_pd_address
:
9709 return "DW_AT_VMS_rtnbeg_pd_address";
9710 /* UPC extension. */
9711 case DW_AT_upc_threads_scaled
:
9712 return "DW_AT_upc_threads_scaled";
9713 /* PGI (STMicroelectronics) extensions. */
9714 case DW_AT_PGI_lbase
:
9715 return "DW_AT_PGI_lbase";
9716 case DW_AT_PGI_soffset
:
9717 return "DW_AT_PGI_soffset";
9718 case DW_AT_PGI_lstride
:
9719 return "DW_AT_PGI_lstride";
9721 return "DW_AT_<unknown>";
9725 /* Convert a DWARF value form code into its string name. */
9728 dwarf_form_name (unsigned form
)
9733 return "DW_FORM_addr";
9734 case DW_FORM_block2
:
9735 return "DW_FORM_block2";
9736 case DW_FORM_block4
:
9737 return "DW_FORM_block4";
9739 return "DW_FORM_data2";
9741 return "DW_FORM_data4";
9743 return "DW_FORM_data8";
9744 case DW_FORM_string
:
9745 return "DW_FORM_string";
9747 return "DW_FORM_block";
9748 case DW_FORM_block1
:
9749 return "DW_FORM_block1";
9751 return "DW_FORM_data1";
9753 return "DW_FORM_flag";
9755 return "DW_FORM_sdata";
9757 return "DW_FORM_strp";
9759 return "DW_FORM_udata";
9760 case DW_FORM_ref_addr
:
9761 return "DW_FORM_ref_addr";
9763 return "DW_FORM_ref1";
9765 return "DW_FORM_ref2";
9767 return "DW_FORM_ref4";
9769 return "DW_FORM_ref8";
9770 case DW_FORM_ref_udata
:
9771 return "DW_FORM_ref_udata";
9772 case DW_FORM_indirect
:
9773 return "DW_FORM_indirect";
9774 case DW_FORM_sec_offset
:
9775 return "DW_FORM_sec_offset";
9776 case DW_FORM_exprloc
:
9777 return "DW_FORM_exprloc";
9778 case DW_FORM_flag_present
:
9779 return "DW_FORM_flag_present";
9781 return "DW_FORM_sig8";
9783 return "DW_FORM_<unknown>";
9787 /* Convert a DWARF stack opcode into its string name. */
9790 dwarf_stack_op_name (unsigned op
)
9795 return "DW_OP_addr";
9797 return "DW_OP_deref";
9799 return "DW_OP_const1u";
9801 return "DW_OP_const1s";
9803 return "DW_OP_const2u";
9805 return "DW_OP_const2s";
9807 return "DW_OP_const4u";
9809 return "DW_OP_const4s";
9811 return "DW_OP_const8u";
9813 return "DW_OP_const8s";
9815 return "DW_OP_constu";
9817 return "DW_OP_consts";
9821 return "DW_OP_drop";
9823 return "DW_OP_over";
9825 return "DW_OP_pick";
9827 return "DW_OP_swap";
9831 return "DW_OP_xderef";
9839 return "DW_OP_minus";
9851 return "DW_OP_plus";
9852 case DW_OP_plus_uconst
:
9853 return "DW_OP_plus_uconst";
9859 return "DW_OP_shra";
9877 return "DW_OP_skip";
9879 return "DW_OP_lit0";
9881 return "DW_OP_lit1";
9883 return "DW_OP_lit2";
9885 return "DW_OP_lit3";
9887 return "DW_OP_lit4";
9889 return "DW_OP_lit5";
9891 return "DW_OP_lit6";
9893 return "DW_OP_lit7";
9895 return "DW_OP_lit8";
9897 return "DW_OP_lit9";
9899 return "DW_OP_lit10";
9901 return "DW_OP_lit11";
9903 return "DW_OP_lit12";
9905 return "DW_OP_lit13";
9907 return "DW_OP_lit14";
9909 return "DW_OP_lit15";
9911 return "DW_OP_lit16";
9913 return "DW_OP_lit17";
9915 return "DW_OP_lit18";
9917 return "DW_OP_lit19";
9919 return "DW_OP_lit20";
9921 return "DW_OP_lit21";
9923 return "DW_OP_lit22";
9925 return "DW_OP_lit23";
9927 return "DW_OP_lit24";
9929 return "DW_OP_lit25";
9931 return "DW_OP_lit26";
9933 return "DW_OP_lit27";
9935 return "DW_OP_lit28";
9937 return "DW_OP_lit29";
9939 return "DW_OP_lit30";
9941 return "DW_OP_lit31";
9943 return "DW_OP_reg0";
9945 return "DW_OP_reg1";
9947 return "DW_OP_reg2";
9949 return "DW_OP_reg3";
9951 return "DW_OP_reg4";
9953 return "DW_OP_reg5";
9955 return "DW_OP_reg6";
9957 return "DW_OP_reg7";
9959 return "DW_OP_reg8";
9961 return "DW_OP_reg9";
9963 return "DW_OP_reg10";
9965 return "DW_OP_reg11";
9967 return "DW_OP_reg12";
9969 return "DW_OP_reg13";
9971 return "DW_OP_reg14";
9973 return "DW_OP_reg15";
9975 return "DW_OP_reg16";
9977 return "DW_OP_reg17";
9979 return "DW_OP_reg18";
9981 return "DW_OP_reg19";
9983 return "DW_OP_reg20";
9985 return "DW_OP_reg21";
9987 return "DW_OP_reg22";
9989 return "DW_OP_reg23";
9991 return "DW_OP_reg24";
9993 return "DW_OP_reg25";
9995 return "DW_OP_reg26";
9997 return "DW_OP_reg27";
9999 return "DW_OP_reg28";
10001 return "DW_OP_reg29";
10003 return "DW_OP_reg30";
10005 return "DW_OP_reg31";
10007 return "DW_OP_breg0";
10009 return "DW_OP_breg1";
10011 return "DW_OP_breg2";
10013 return "DW_OP_breg3";
10015 return "DW_OP_breg4";
10017 return "DW_OP_breg5";
10019 return "DW_OP_breg6";
10021 return "DW_OP_breg7";
10023 return "DW_OP_breg8";
10025 return "DW_OP_breg9";
10027 return "DW_OP_breg10";
10029 return "DW_OP_breg11";
10031 return "DW_OP_breg12";
10033 return "DW_OP_breg13";
10035 return "DW_OP_breg14";
10037 return "DW_OP_breg15";
10039 return "DW_OP_breg16";
10041 return "DW_OP_breg17";
10043 return "DW_OP_breg18";
10045 return "DW_OP_breg19";
10047 return "DW_OP_breg20";
10049 return "DW_OP_breg21";
10051 return "DW_OP_breg22";
10053 return "DW_OP_breg23";
10055 return "DW_OP_breg24";
10057 return "DW_OP_breg25";
10059 return "DW_OP_breg26";
10061 return "DW_OP_breg27";
10063 return "DW_OP_breg28";
10065 return "DW_OP_breg29";
10067 return "DW_OP_breg30";
10069 return "DW_OP_breg31";
10071 return "DW_OP_regx";
10073 return "DW_OP_fbreg";
10075 return "DW_OP_bregx";
10077 return "DW_OP_piece";
10078 case DW_OP_deref_size
:
10079 return "DW_OP_deref_size";
10080 case DW_OP_xderef_size
:
10081 return "DW_OP_xderef_size";
10083 return "DW_OP_nop";
10084 /* DWARF 3 extensions. */
10085 case DW_OP_push_object_address
:
10086 return "DW_OP_push_object_address";
10088 return "DW_OP_call2";
10090 return "DW_OP_call4";
10091 case DW_OP_call_ref
:
10092 return "DW_OP_call_ref";
10093 /* GNU extensions. */
10094 case DW_OP_form_tls_address
:
10095 return "DW_OP_form_tls_address";
10096 case DW_OP_call_frame_cfa
:
10097 return "DW_OP_call_frame_cfa";
10098 case DW_OP_bit_piece
:
10099 return "DW_OP_bit_piece";
10100 case DW_OP_GNU_push_tls_address
:
10101 return "DW_OP_GNU_push_tls_address";
10102 case DW_OP_GNU_uninit
:
10103 return "DW_OP_GNU_uninit";
10104 /* HP extensions. */
10105 case DW_OP_HP_is_value
:
10106 return "DW_OP_HP_is_value";
10107 case DW_OP_HP_fltconst4
:
10108 return "DW_OP_HP_fltconst4";
10109 case DW_OP_HP_fltconst8
:
10110 return "DW_OP_HP_fltconst8";
10111 case DW_OP_HP_mod_range
:
10112 return "DW_OP_HP_mod_range";
10113 case DW_OP_HP_unmod_range
:
10114 return "DW_OP_HP_unmod_range";
10116 return "DW_OP_HP_tls";
10118 return "OP_<unknown>";
10123 dwarf_bool_name (unsigned mybool
)
10131 /* Convert a DWARF type code into its string name. */
10134 dwarf_type_encoding_name (unsigned enc
)
10139 return "DW_ATE_void";
10140 case DW_ATE_address
:
10141 return "DW_ATE_address";
10142 case DW_ATE_boolean
:
10143 return "DW_ATE_boolean";
10144 case DW_ATE_complex_float
:
10145 return "DW_ATE_complex_float";
10147 return "DW_ATE_float";
10148 case DW_ATE_signed
:
10149 return "DW_ATE_signed";
10150 case DW_ATE_signed_char
:
10151 return "DW_ATE_signed_char";
10152 case DW_ATE_unsigned
:
10153 return "DW_ATE_unsigned";
10154 case DW_ATE_unsigned_char
:
10155 return "DW_ATE_unsigned_char";
10157 case DW_ATE_imaginary_float
:
10158 return "DW_ATE_imaginary_float";
10159 case DW_ATE_packed_decimal
:
10160 return "DW_ATE_packed_decimal";
10161 case DW_ATE_numeric_string
:
10162 return "DW_ATE_numeric_string";
10163 case DW_ATE_edited
:
10164 return "DW_ATE_edited";
10165 case DW_ATE_signed_fixed
:
10166 return "DW_ATE_signed_fixed";
10167 case DW_ATE_unsigned_fixed
:
10168 return "DW_ATE_unsigned_fixed";
10169 case DW_ATE_decimal_float
:
10170 return "DW_ATE_decimal_float";
10171 /* HP extensions. */
10172 case DW_ATE_HP_float80
:
10173 return "DW_ATE_HP_float80";
10174 case DW_ATE_HP_complex_float80
:
10175 return "DW_ATE_HP_complex_float80";
10176 case DW_ATE_HP_float128
:
10177 return "DW_ATE_HP_float128";
10178 case DW_ATE_HP_complex_float128
:
10179 return "DW_ATE_HP_complex_float128";
10180 case DW_ATE_HP_floathpintel
:
10181 return "DW_ATE_HP_floathpintel";
10182 case DW_ATE_HP_imaginary_float80
:
10183 return "DW_ATE_HP_imaginary_float80";
10184 case DW_ATE_HP_imaginary_float128
:
10185 return "DW_ATE_HP_imaginary_float128";
10187 return "DW_ATE_<unknown>";
10191 /* Convert a DWARF call frame info operation to its string name. */
10195 dwarf_cfi_name (unsigned cfi_opc
)
10199 case DW_CFA_advance_loc
:
10200 return "DW_CFA_advance_loc";
10201 case DW_CFA_offset
:
10202 return "DW_CFA_offset";
10203 case DW_CFA_restore
:
10204 return "DW_CFA_restore";
10206 return "DW_CFA_nop";
10207 case DW_CFA_set_loc
:
10208 return "DW_CFA_set_loc";
10209 case DW_CFA_advance_loc1
:
10210 return "DW_CFA_advance_loc1";
10211 case DW_CFA_advance_loc2
:
10212 return "DW_CFA_advance_loc2";
10213 case DW_CFA_advance_loc4
:
10214 return "DW_CFA_advance_loc4";
10215 case DW_CFA_offset_extended
:
10216 return "DW_CFA_offset_extended";
10217 case DW_CFA_restore_extended
:
10218 return "DW_CFA_restore_extended";
10219 case DW_CFA_undefined
:
10220 return "DW_CFA_undefined";
10221 case DW_CFA_same_value
:
10222 return "DW_CFA_same_value";
10223 case DW_CFA_register
:
10224 return "DW_CFA_register";
10225 case DW_CFA_remember_state
:
10226 return "DW_CFA_remember_state";
10227 case DW_CFA_restore_state
:
10228 return "DW_CFA_restore_state";
10229 case DW_CFA_def_cfa
:
10230 return "DW_CFA_def_cfa";
10231 case DW_CFA_def_cfa_register
:
10232 return "DW_CFA_def_cfa_register";
10233 case DW_CFA_def_cfa_offset
:
10234 return "DW_CFA_def_cfa_offset";
10236 case DW_CFA_def_cfa_expression
:
10237 return "DW_CFA_def_cfa_expression";
10238 case DW_CFA_expression
:
10239 return "DW_CFA_expression";
10240 case DW_CFA_offset_extended_sf
:
10241 return "DW_CFA_offset_extended_sf";
10242 case DW_CFA_def_cfa_sf
:
10243 return "DW_CFA_def_cfa_sf";
10244 case DW_CFA_def_cfa_offset_sf
:
10245 return "DW_CFA_def_cfa_offset_sf";
10246 case DW_CFA_val_offset
:
10247 return "DW_CFA_val_offset";
10248 case DW_CFA_val_offset_sf
:
10249 return "DW_CFA_val_offset_sf";
10250 case DW_CFA_val_expression
:
10251 return "DW_CFA_val_expression";
10252 /* SGI/MIPS specific. */
10253 case DW_CFA_MIPS_advance_loc8
:
10254 return "DW_CFA_MIPS_advance_loc8";
10255 /* GNU extensions. */
10256 case DW_CFA_GNU_window_save
:
10257 return "DW_CFA_GNU_window_save";
10258 case DW_CFA_GNU_args_size
:
10259 return "DW_CFA_GNU_args_size";
10260 case DW_CFA_GNU_negative_offset_extended
:
10261 return "DW_CFA_GNU_negative_offset_extended";
10263 return "DW_CFA_<unknown>";
10269 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
10273 print_spaces (indent
, f
);
10274 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
10275 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
10277 if (die
->parent
!= NULL
)
10279 print_spaces (indent
, f
);
10280 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
10281 die
->parent
->offset
);
10284 print_spaces (indent
, f
);
10285 fprintf_unfiltered (f
, " has children: %s\n",
10286 dwarf_bool_name (die
->child
!= NULL
));
10288 print_spaces (indent
, f
);
10289 fprintf_unfiltered (f
, " attributes:\n");
10291 for (i
= 0; i
< die
->num_attrs
; ++i
)
10293 print_spaces (indent
, f
);
10294 fprintf_unfiltered (f
, " %s (%s) ",
10295 dwarf_attr_name (die
->attrs
[i
].name
),
10296 dwarf_form_name (die
->attrs
[i
].form
));
10298 switch (die
->attrs
[i
].form
)
10300 case DW_FORM_ref_addr
:
10302 fprintf_unfiltered (f
, "address: ");
10303 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
10305 case DW_FORM_block2
:
10306 case DW_FORM_block4
:
10307 case DW_FORM_block
:
10308 case DW_FORM_block1
:
10309 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
10314 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
10315 (long) (DW_ADDR (&die
->attrs
[i
])));
10317 case DW_FORM_data1
:
10318 case DW_FORM_data2
:
10319 case DW_FORM_data4
:
10320 case DW_FORM_data8
:
10321 case DW_FORM_udata
:
10322 case DW_FORM_sdata
:
10323 fprintf_unfiltered (f
, "constant: %s",
10324 pulongest (DW_UNSND (&die
->attrs
[i
])));
10327 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
10328 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
10329 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
10331 fprintf_unfiltered (f
, "signatured type, offset: unknown");
10333 case DW_FORM_string
:
10335 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
10336 DW_STRING (&die
->attrs
[i
])
10337 ? DW_STRING (&die
->attrs
[i
]) : "",
10338 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
10341 if (DW_UNSND (&die
->attrs
[i
]))
10342 fprintf_unfiltered (f
, "flag: TRUE");
10344 fprintf_unfiltered (f
, "flag: FALSE");
10346 case DW_FORM_indirect
:
10347 /* the reader will have reduced the indirect form to
10348 the "base form" so this form should not occur */
10349 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
10352 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
10353 die
->attrs
[i
].form
);
10356 fprintf_unfiltered (f
, "\n");
10361 dump_die_for_error (struct die_info
*die
)
10363 dump_die_shallow (gdb_stderr
, 0, die
);
10367 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
10369 int indent
= level
* 4;
10371 gdb_assert (die
!= NULL
);
10373 if (level
>= max_level
)
10376 dump_die_shallow (f
, indent
, die
);
10378 if (die
->child
!= NULL
)
10380 print_spaces (indent
, f
);
10381 fprintf_unfiltered (f
, " Children:");
10382 if (level
+ 1 < max_level
)
10384 fprintf_unfiltered (f
, "\n");
10385 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
10389 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
10393 if (die
->sibling
!= NULL
&& level
> 0)
10395 dump_die_1 (f
, level
, max_level
, die
->sibling
);
10399 /* This is called from the pdie macro in gdbinit.in.
10400 It's not static so gcc will keep a copy callable from gdb. */
10403 dump_die (struct die_info
*die
, int max_level
)
10405 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
10409 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
10413 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
10419 is_ref_attr (struct attribute
*attr
)
10421 switch (attr
->form
)
10423 case DW_FORM_ref_addr
:
10428 case DW_FORM_ref_udata
:
10435 static unsigned int
10436 dwarf2_get_ref_die_offset (struct attribute
*attr
)
10438 if (is_ref_attr (attr
))
10439 return DW_ADDR (attr
);
10441 complaint (&symfile_complaints
,
10442 _("unsupported die ref attribute form: '%s'"),
10443 dwarf_form_name (attr
->form
));
10447 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
10448 * the value held by the attribute is not constant. */
10451 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
10453 if (attr
->form
== DW_FORM_sdata
)
10454 return DW_SND (attr
);
10455 else if (attr
->form
== DW_FORM_udata
10456 || attr
->form
== DW_FORM_data1
10457 || attr
->form
== DW_FORM_data2
10458 || attr
->form
== DW_FORM_data4
10459 || attr
->form
== DW_FORM_data8
)
10460 return DW_UNSND (attr
);
10463 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
10464 dwarf_form_name (attr
->form
));
10465 return default_value
;
10469 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10470 unit and add it to our queue.
10471 The result is non-zero if PER_CU was queued, otherwise the result is zero
10472 meaning either PER_CU is already queued or it is already loaded. */
10475 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
10476 struct dwarf2_per_cu_data
*per_cu
)
10478 /* Mark the dependence relation so that we don't flush PER_CU
10480 dwarf2_add_dependence (this_cu
, per_cu
);
10482 /* If it's already on the queue, we have nothing to do. */
10483 if (per_cu
->queued
)
10486 /* If the compilation unit is already loaded, just mark it as
10488 if (per_cu
->cu
!= NULL
)
10490 per_cu
->cu
->last_used
= 0;
10494 /* Add it to the queue. */
10495 queue_comp_unit (per_cu
, this_cu
->objfile
);
10500 /* Follow reference or signature attribute ATTR of SRC_DIE.
10501 On entry *REF_CU is the CU of SRC_DIE.
10502 On exit *REF_CU is the CU of the result. */
10504 static struct die_info
*
10505 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
10506 struct dwarf2_cu
**ref_cu
)
10508 struct die_info
*die
;
10510 if (is_ref_attr (attr
))
10511 die
= follow_die_ref (src_die
, attr
, ref_cu
);
10512 else if (attr
->form
== DW_FORM_sig8
)
10513 die
= follow_die_sig (src_die
, attr
, ref_cu
);
10516 dump_die_for_error (src_die
);
10517 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10518 (*ref_cu
)->objfile
->name
);
10524 /* Follow reference attribute ATTR of SRC_DIE.
10525 On entry *REF_CU is the CU of SRC_DIE.
10526 On exit *REF_CU is the CU of the result. */
10528 static struct die_info
*
10529 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
10530 struct dwarf2_cu
**ref_cu
)
10532 struct die_info
*die
;
10533 unsigned int offset
;
10534 struct die_info temp_die
;
10535 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
10537 gdb_assert (cu
->per_cu
!= NULL
);
10539 offset
= dwarf2_get_ref_die_offset (attr
);
10541 if (cu
->per_cu
->from_debug_types
)
10543 /* .debug_types CUs cannot reference anything outside their CU.
10544 If they need to, they have to reference a signatured type via
10546 if (! offset_in_cu_p (&cu
->header
, offset
))
10550 else if (! offset_in_cu_p (&cu
->header
, offset
))
10552 struct dwarf2_per_cu_data
*per_cu
;
10553 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
10555 /* If necessary, add it to the queue and load its DIEs. */
10556 if (maybe_queue_comp_unit (cu
, per_cu
))
10557 load_full_comp_unit (per_cu
, cu
->objfile
);
10559 target_cu
= per_cu
->cu
;
10564 *ref_cu
= target_cu
;
10565 temp_die
.offset
= offset
;
10566 die
= htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
10572 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10573 "at 0x%x [in module %s]"),
10574 offset
, src_die
->offset
, cu
->objfile
->name
);
10577 /* Follow the signature attribute ATTR in SRC_DIE.
10578 On entry *REF_CU is the CU of SRC_DIE.
10579 On exit *REF_CU is the CU of the result. */
10581 static struct die_info
*
10582 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
10583 struct dwarf2_cu
**ref_cu
)
10585 struct objfile
*objfile
= (*ref_cu
)->objfile
;
10586 struct die_info temp_die
;
10587 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
10588 struct dwarf2_cu
*sig_cu
;
10589 struct die_info
*die
;
10591 /* sig_type will be NULL if the signatured type is missing from
10593 if (sig_type
== NULL
)
10594 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10595 "at 0x%x [in module %s]"),
10596 src_die
->offset
, objfile
->name
);
10598 /* If necessary, add it to the queue and load its DIEs. */
10600 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
10601 read_signatured_type (objfile
, sig_type
);
10603 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
10605 sig_cu
= sig_type
->per_cu
.cu
;
10606 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
10607 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
10614 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10615 "at 0x%x [in module %s]"),
10616 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
10619 /* Given an offset of a signatured type, return its signatured_type. */
10621 static struct signatured_type
*
10622 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
10624 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
10625 unsigned int length
, initial_length_size
;
10626 unsigned int sig_offset
;
10627 struct signatured_type find_entry
, *type_sig
;
10629 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
10630 sig_offset
= (initial_length_size
10632 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
10633 + 1 /*address_size*/);
10634 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
10635 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
10637 /* This is only used to lookup previously recorded types.
10638 If we didn't find it, it's our bug. */
10639 gdb_assert (type_sig
!= NULL
);
10640 gdb_assert (offset
== type_sig
->offset
);
10645 /* Read in signatured type at OFFSET and build its CU and die(s). */
10648 read_signatured_type_at_offset (struct objfile
*objfile
,
10649 unsigned int offset
)
10651 struct signatured_type
*type_sig
;
10653 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
10655 /* We have the section offset, but we need the signature to do the
10656 hash table lookup. */
10657 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
10659 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10661 read_signatured_type (objfile
, type_sig
);
10663 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
10666 /* Read in a signatured type and build its CU and DIEs. */
10669 read_signatured_type (struct objfile
*objfile
,
10670 struct signatured_type
*type_sig
)
10672 gdb_byte
*types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
10673 struct die_reader_specs reader_specs
;
10674 struct dwarf2_cu
*cu
;
10675 ULONGEST signature
;
10676 struct cleanup
*back_to
, *free_cu_cleanup
;
10677 struct attribute
*attr
;
10679 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10681 cu
= xmalloc (sizeof (struct dwarf2_cu
));
10682 memset (cu
, 0, sizeof (struct dwarf2_cu
));
10683 obstack_init (&cu
->comp_unit_obstack
);
10684 cu
->objfile
= objfile
;
10685 type_sig
->per_cu
.cu
= cu
;
10686 cu
->per_cu
= &type_sig
->per_cu
;
10688 /* If an error occurs while loading, release our storage. */
10689 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
10691 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
10692 types_ptr
, objfile
->obfd
);
10693 gdb_assert (signature
== type_sig
->signature
);
10696 = htab_create_alloc_ex (cu
->header
.length
/ 12,
10700 &cu
->comp_unit_obstack
,
10701 hashtab_obstack_allocate
,
10702 dummy_obstack_deallocate
);
10704 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
10705 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
10707 init_cu_die_reader (&reader_specs
, cu
);
10709 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
10712 /* We try not to read any attributes in this function, because not
10713 all objfiles needed for references have been loaded yet, and symbol
10714 table processing isn't initialized. But we have to set the CU language,
10715 or we won't be able to build types correctly. */
10716 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
10718 set_cu_language (DW_UNSND (attr
), cu
);
10720 set_cu_language (language_minimal
, cu
);
10722 do_cleanups (back_to
);
10724 /* We've successfully allocated this compilation unit. Let our caller
10725 clean it up when finished with it. */
10726 discard_cleanups (free_cu_cleanup
);
10728 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
10729 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
10732 /* Decode simple location descriptions.
10733 Given a pointer to a dwarf block that defines a location, compute
10734 the location and return the value.
10736 NOTE drow/2003-11-18: This function is called in two situations
10737 now: for the address of static or global variables (partial symbols
10738 only) and for offsets into structures which are expected to be
10739 (more or less) constant. The partial symbol case should go away,
10740 and only the constant case should remain. That will let this
10741 function complain more accurately. A few special modes are allowed
10742 without complaint for global variables (for instance, global
10743 register values and thread-local values).
10745 A location description containing no operations indicates that the
10746 object is optimized out. The return value is 0 for that case.
10747 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10748 callers will only want a very basic result and this can become a
10751 Note that stack[0] is unused except as a default error return.
10752 Note that stack overflow is not yet handled. */
10755 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
10757 struct objfile
*objfile
= cu
->objfile
;
10758 struct comp_unit_head
*cu_header
= &cu
->header
;
10760 int size
= blk
->size
;
10761 gdb_byte
*data
= blk
->data
;
10762 CORE_ADDR stack
[64];
10764 unsigned int bytes_read
, unsnd
;
10808 stack
[++stacki
] = op
- DW_OP_lit0
;
10843 stack
[++stacki
] = op
- DW_OP_reg0
;
10845 dwarf2_complex_location_expr_complaint ();
10849 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10851 stack
[++stacki
] = unsnd
;
10853 dwarf2_complex_location_expr_complaint ();
10857 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
10862 case DW_OP_const1u
:
10863 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
10867 case DW_OP_const1s
:
10868 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
10872 case DW_OP_const2u
:
10873 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
10877 case DW_OP_const2s
:
10878 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
10882 case DW_OP_const4u
:
10883 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
10887 case DW_OP_const4s
:
10888 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
10893 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
10899 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
10904 stack
[stacki
+ 1] = stack
[stacki
];
10909 stack
[stacki
- 1] += stack
[stacki
];
10913 case DW_OP_plus_uconst
:
10914 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10919 stack
[stacki
- 1] -= stack
[stacki
];
10924 /* If we're not the last op, then we definitely can't encode
10925 this using GDB's address_class enum. This is valid for partial
10926 global symbols, although the variable's address will be bogus
10929 dwarf2_complex_location_expr_complaint ();
10932 case DW_OP_GNU_push_tls_address
:
10933 /* The top of the stack has the offset from the beginning
10934 of the thread control block at which the variable is located. */
10935 /* Nothing should follow this operator, so the top of stack would
10937 /* This is valid for partial global symbols, but the variable's
10938 address will be bogus in the psymtab. */
10940 dwarf2_complex_location_expr_complaint ();
10943 case DW_OP_GNU_uninit
:
10947 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
10948 dwarf_stack_op_name (op
));
10949 return (stack
[stacki
]);
10952 return (stack
[stacki
]);
10955 /* memory allocation interface */
10957 static struct dwarf_block
*
10958 dwarf_alloc_block (struct dwarf2_cu
*cu
)
10960 struct dwarf_block
*blk
;
10962 blk
= (struct dwarf_block
*)
10963 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
10967 static struct abbrev_info
*
10968 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
10970 struct abbrev_info
*abbrev
;
10972 abbrev
= (struct abbrev_info
*)
10973 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
10974 memset (abbrev
, 0, sizeof (struct abbrev_info
));
10978 static struct die_info
*
10979 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
10981 struct die_info
*die
;
10982 size_t size
= sizeof (struct die_info
);
10985 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
10987 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
10988 memset (die
, 0, sizeof (struct die_info
));
10993 /* Macro support. */
10996 /* Return the full name of file number I in *LH's file name table.
10997 Use COMP_DIR as the name of the current directory of the
10998 compilation. The result is allocated using xmalloc; the caller is
10999 responsible for freeing it. */
11001 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
11003 /* Is the file number a valid index into the line header's file name
11004 table? Remember that file numbers start with one, not zero. */
11005 if (1 <= file
&& file
<= lh
->num_file_names
)
11007 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
11009 if (IS_ABSOLUTE_PATH (fe
->name
))
11010 return xstrdup (fe
->name
);
11018 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11024 dir_len
= strlen (dir
);
11025 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
11026 strcpy (full_name
, dir
);
11027 full_name
[dir_len
] = '/';
11028 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
11032 return xstrdup (fe
->name
);
11037 /* The compiler produced a bogus file number. We can at least
11038 record the macro definitions made in the file, even if we
11039 won't be able to find the file by name. */
11040 char fake_name
[80];
11041 sprintf (fake_name
, "<bad macro file number %d>", file
);
11043 complaint (&symfile_complaints
,
11044 _("bad file number in macro information (%d)"),
11047 return xstrdup (fake_name
);
11052 static struct macro_source_file
*
11053 macro_start_file (int file
, int line
,
11054 struct macro_source_file
*current_file
,
11055 const char *comp_dir
,
11056 struct line_header
*lh
, struct objfile
*objfile
)
11058 /* The full name of this source file. */
11059 char *full_name
= file_full_name (file
, lh
, comp_dir
);
11061 /* We don't create a macro table for this compilation unit
11062 at all until we actually get a filename. */
11063 if (! pending_macros
)
11064 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
11065 objfile
->macro_cache
);
11067 if (! current_file
)
11068 /* If we have no current file, then this must be the start_file
11069 directive for the compilation unit's main source file. */
11070 current_file
= macro_set_main (pending_macros
, full_name
);
11072 current_file
= macro_include (current_file
, line
, full_name
);
11076 return current_file
;
11080 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
11081 followed by a null byte. */
11083 copy_string (const char *buf
, int len
)
11085 char *s
= xmalloc (len
+ 1);
11086 memcpy (s
, buf
, len
);
11093 static const char *
11094 consume_improper_spaces (const char *p
, const char *body
)
11098 complaint (&symfile_complaints
,
11099 _("macro definition contains spaces in formal argument list:\n`%s'"),
11111 parse_macro_definition (struct macro_source_file
*file
, int line
,
11116 /* The body string takes one of two forms. For object-like macro
11117 definitions, it should be:
11119 <macro name> " " <definition>
11121 For function-like macro definitions, it should be:
11123 <macro name> "() " <definition>
11125 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
11127 Spaces may appear only where explicitly indicated, and in the
11130 The Dwarf 2 spec says that an object-like macro's name is always
11131 followed by a space, but versions of GCC around March 2002 omit
11132 the space when the macro's definition is the empty string.
11134 The Dwarf 2 spec says that there should be no spaces between the
11135 formal arguments in a function-like macro's formal argument list,
11136 but versions of GCC around March 2002 include spaces after the
11140 /* Find the extent of the macro name. The macro name is terminated
11141 by either a space or null character (for an object-like macro) or
11142 an opening paren (for a function-like macro). */
11143 for (p
= body
; *p
; p
++)
11144 if (*p
== ' ' || *p
== '(')
11147 if (*p
== ' ' || *p
== '\0')
11149 /* It's an object-like macro. */
11150 int name_len
= p
- body
;
11151 char *name
= copy_string (body
, name_len
);
11152 const char *replacement
;
11155 replacement
= body
+ name_len
+ 1;
11158 dwarf2_macro_malformed_definition_complaint (body
);
11159 replacement
= body
+ name_len
;
11162 macro_define_object (file
, line
, name
, replacement
);
11166 else if (*p
== '(')
11168 /* It's a function-like macro. */
11169 char *name
= copy_string (body
, p
- body
);
11172 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
11176 p
= consume_improper_spaces (p
, body
);
11178 /* Parse the formal argument list. */
11179 while (*p
&& *p
!= ')')
11181 /* Find the extent of the current argument name. */
11182 const char *arg_start
= p
;
11184 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
11187 if (! *p
|| p
== arg_start
)
11188 dwarf2_macro_malformed_definition_complaint (body
);
11191 /* Make sure argv has room for the new argument. */
11192 if (argc
>= argv_size
)
11195 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
11198 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
11201 p
= consume_improper_spaces (p
, body
);
11203 /* Consume the comma, if present. */
11208 p
= consume_improper_spaces (p
, body
);
11217 /* Perfectly formed definition, no complaints. */
11218 macro_define_function (file
, line
, name
,
11219 argc
, (const char **) argv
,
11221 else if (*p
== '\0')
11223 /* Complain, but do define it. */
11224 dwarf2_macro_malformed_definition_complaint (body
);
11225 macro_define_function (file
, line
, name
,
11226 argc
, (const char **) argv
,
11230 /* Just complain. */
11231 dwarf2_macro_malformed_definition_complaint (body
);
11234 /* Just complain. */
11235 dwarf2_macro_malformed_definition_complaint (body
);
11241 for (i
= 0; i
< argc
; i
++)
11247 dwarf2_macro_malformed_definition_complaint (body
);
11252 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
11253 char *comp_dir
, bfd
*abfd
,
11254 struct dwarf2_cu
*cu
)
11256 gdb_byte
*mac_ptr
, *mac_end
;
11257 struct macro_source_file
*current_file
= 0;
11258 enum dwarf_macinfo_record_type macinfo_type
;
11259 int at_commandline
;
11261 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
11262 &dwarf2_per_objfile
->macinfo
);
11263 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
11265 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
11269 /* First pass: Find the name of the base filename.
11270 This filename is needed in order to process all macros whose definition
11271 (or undefinition) comes from the command line. These macros are defined
11272 before the first DW_MACINFO_start_file entry, and yet still need to be
11273 associated to the base file.
11275 To determine the base file name, we scan the macro definitions until we
11276 reach the first DW_MACINFO_start_file entry. We then initialize
11277 CURRENT_FILE accordingly so that any macro definition found before the
11278 first DW_MACINFO_start_file can still be associated to the base file. */
11280 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11281 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
11282 + dwarf2_per_objfile
->macinfo
.size
;
11286 /* Do we at least have room for a macinfo type byte? */
11287 if (mac_ptr
>= mac_end
)
11289 /* Complaint is printed during the second pass as GDB will probably
11290 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11294 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11297 switch (macinfo_type
)
11299 /* A zero macinfo type indicates the end of the macro
11304 case DW_MACINFO_define
:
11305 case DW_MACINFO_undef
:
11306 /* Only skip the data by MAC_PTR. */
11308 unsigned int bytes_read
;
11310 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11311 mac_ptr
+= bytes_read
;
11312 read_string (abfd
, mac_ptr
, &bytes_read
);
11313 mac_ptr
+= bytes_read
;
11317 case DW_MACINFO_start_file
:
11319 unsigned int bytes_read
;
11322 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11323 mac_ptr
+= bytes_read
;
11324 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11325 mac_ptr
+= bytes_read
;
11327 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
11332 case DW_MACINFO_end_file
:
11333 /* No data to skip by MAC_PTR. */
11336 case DW_MACINFO_vendor_ext
:
11337 /* Only skip the data by MAC_PTR. */
11339 unsigned int bytes_read
;
11341 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11342 mac_ptr
+= bytes_read
;
11343 read_string (abfd
, mac_ptr
, &bytes_read
);
11344 mac_ptr
+= bytes_read
;
11351 } while (macinfo_type
!= 0 && current_file
== NULL
);
11353 /* Second pass: Process all entries.
11355 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11356 command-line macro definitions/undefinitions. This flag is unset when we
11357 reach the first DW_MACINFO_start_file entry. */
11359 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11361 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11362 GDB is still reading the definitions from command line. First
11363 DW_MACINFO_start_file will need to be ignored as it was already executed
11364 to create CURRENT_FILE for the main source holding also the command line
11365 definitions. On first met DW_MACINFO_start_file this flag is reset to
11366 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11368 at_commandline
= 1;
11372 /* Do we at least have room for a macinfo type byte? */
11373 if (mac_ptr
>= mac_end
)
11375 dwarf2_macros_too_long_complaint ();
11379 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11382 switch (macinfo_type
)
11384 /* A zero macinfo type indicates the end of the macro
11389 case DW_MACINFO_define
:
11390 case DW_MACINFO_undef
:
11392 unsigned int bytes_read
;
11396 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11397 mac_ptr
+= bytes_read
;
11398 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
11399 mac_ptr
+= bytes_read
;
11401 if (! current_file
)
11403 /* DWARF violation as no main source is present. */
11404 complaint (&symfile_complaints
,
11405 _("debug info with no main source gives macro %s "
11407 macinfo_type
== DW_MACINFO_define
?
11409 macinfo_type
== DW_MACINFO_undef
?
11410 _("undefinition") :
11411 _("something-or-other"), line
, body
);
11414 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11415 complaint (&symfile_complaints
,
11416 _("debug info gives %s macro %s with %s line %d: %s"),
11417 at_commandline
? _("command-line") : _("in-file"),
11418 macinfo_type
== DW_MACINFO_define
?
11420 macinfo_type
== DW_MACINFO_undef
?
11421 _("undefinition") :
11422 _("something-or-other"),
11423 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
11425 if (macinfo_type
== DW_MACINFO_define
)
11426 parse_macro_definition (current_file
, line
, body
);
11427 else if (macinfo_type
== DW_MACINFO_undef
)
11428 macro_undef (current_file
, line
, body
);
11432 case DW_MACINFO_start_file
:
11434 unsigned int bytes_read
;
11437 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11438 mac_ptr
+= bytes_read
;
11439 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11440 mac_ptr
+= bytes_read
;
11442 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11443 complaint (&symfile_complaints
,
11444 _("debug info gives source %d included "
11445 "from %s at %s line %d"),
11446 file
, at_commandline
? _("command-line") : _("file"),
11447 line
== 0 ? _("zero") : _("non-zero"), line
);
11449 if (at_commandline
)
11451 /* This DW_MACINFO_start_file was executed in the pass one. */
11452 at_commandline
= 0;
11455 current_file
= macro_start_file (file
, line
,
11456 current_file
, comp_dir
,
11461 case DW_MACINFO_end_file
:
11462 if (! current_file
)
11463 complaint (&symfile_complaints
,
11464 _("macro debug info has an unmatched `close_file' directive"));
11467 current_file
= current_file
->included_by
;
11468 if (! current_file
)
11470 enum dwarf_macinfo_record_type next_type
;
11472 /* GCC circa March 2002 doesn't produce the zero
11473 type byte marking the end of the compilation
11474 unit. Complain if it's not there, but exit no
11477 /* Do we at least have room for a macinfo type byte? */
11478 if (mac_ptr
>= mac_end
)
11480 dwarf2_macros_too_long_complaint ();
11484 /* We don't increment mac_ptr here, so this is just
11486 next_type
= read_1_byte (abfd
, mac_ptr
);
11487 if (next_type
!= 0)
11488 complaint (&symfile_complaints
,
11489 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11496 case DW_MACINFO_vendor_ext
:
11498 unsigned int bytes_read
;
11502 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11503 mac_ptr
+= bytes_read
;
11504 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
11505 mac_ptr
+= bytes_read
;
11507 /* We don't recognize any vendor extensions. */
11511 } while (macinfo_type
!= 0);
11514 /* Check if the attribute's form is a DW_FORM_block*
11515 if so return true else false. */
11517 attr_form_is_block (struct attribute
*attr
)
11519 return (attr
== NULL
? 0 :
11520 attr
->form
== DW_FORM_block1
11521 || attr
->form
== DW_FORM_block2
11522 || attr
->form
== DW_FORM_block4
11523 || attr
->form
== DW_FORM_block
);
11526 /* Return non-zero if ATTR's value is a section offset --- classes
11527 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11528 You may use DW_UNSND (attr) to retrieve such offsets.
11530 Section 7.5.4, "Attribute Encodings", explains that no attribute
11531 may have a value that belongs to more than one of these classes; it
11532 would be ambiguous if we did, because we use the same forms for all
11535 attr_form_is_section_offset (struct attribute
*attr
)
11537 return (attr
->form
== DW_FORM_data4
11538 || attr
->form
== DW_FORM_data8
);
11542 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11543 zero otherwise. When this function returns true, you can apply
11544 dwarf2_get_attr_constant_value to it.
11546 However, note that for some attributes you must check
11547 attr_form_is_section_offset before using this test. DW_FORM_data4
11548 and DW_FORM_data8 are members of both the constant class, and of
11549 the classes that contain offsets into other debug sections
11550 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11551 that, if an attribute's can be either a constant or one of the
11552 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11553 taken as section offsets, not constants. */
11555 attr_form_is_constant (struct attribute
*attr
)
11557 switch (attr
->form
)
11559 case DW_FORM_sdata
:
11560 case DW_FORM_udata
:
11561 case DW_FORM_data1
:
11562 case DW_FORM_data2
:
11563 case DW_FORM_data4
:
11564 case DW_FORM_data8
:
11572 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
11573 struct dwarf2_cu
*cu
)
11575 if (attr_form_is_section_offset (attr
)
11576 /* ".debug_loc" may not exist at all, or the offset may be outside
11577 the section. If so, fall through to the complaint in the
11579 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
11581 struct dwarf2_loclist_baton
*baton
;
11583 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11584 sizeof (struct dwarf2_loclist_baton
));
11585 baton
->per_cu
= cu
->per_cu
;
11586 gdb_assert (baton
->per_cu
);
11588 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
11589 &dwarf2_per_objfile
->loc
);
11591 /* We don't know how long the location list is, but make sure we
11592 don't run off the edge of the section. */
11593 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
11594 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
11595 baton
->base_address
= cu
->base_address
;
11596 if (cu
->base_known
== 0)
11597 complaint (&symfile_complaints
,
11598 _("Location list used without specifying the CU base address."));
11600 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
11601 SYMBOL_LOCATION_BATON (sym
) = baton
;
11605 struct dwarf2_locexpr_baton
*baton
;
11607 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11608 sizeof (struct dwarf2_locexpr_baton
));
11609 baton
->per_cu
= cu
->per_cu
;
11610 gdb_assert (baton
->per_cu
);
11612 if (attr_form_is_block (attr
))
11614 /* Note that we're just copying the block's data pointer
11615 here, not the actual data. We're still pointing into the
11616 info_buffer for SYM's objfile; right now we never release
11617 that buffer, but when we do clean up properly this may
11619 baton
->size
= DW_BLOCK (attr
)->size
;
11620 baton
->data
= DW_BLOCK (attr
)->data
;
11624 dwarf2_invalid_attrib_class_complaint ("location description",
11625 SYMBOL_NATURAL_NAME (sym
));
11627 baton
->data
= NULL
;
11630 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11631 SYMBOL_LOCATION_BATON (sym
) = baton
;
11635 /* Return the OBJFILE associated with the compilation unit CU. */
11638 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
11640 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11642 /* Return the master objfile, so that we can report and look up the
11643 correct file containing this variable. */
11644 if (objfile
->separate_debug_objfile_backlink
)
11645 objfile
= objfile
->separate_debug_objfile_backlink
;
11650 /* Return the address size given in the compilation unit header for CU. */
11653 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
11656 return per_cu
->cu
->header
.addr_size
;
11659 /* If the CU is not currently read in, we re-read its header. */
11660 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11661 struct dwarf2_per_objfile
*per_objfile
11662 = objfile_data (objfile
, dwarf2_objfile_data_key
);
11663 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
11665 struct comp_unit_head cu_header
;
11666 memset (&cu_header
, 0, sizeof cu_header
);
11667 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
11668 return cu_header
.addr_size
;
11672 /* Locate the .debug_info compilation unit from CU's objfile which contains
11673 the DIE at OFFSET. Raises an error on failure. */
11675 static struct dwarf2_per_cu_data
*
11676 dwarf2_find_containing_comp_unit (unsigned int offset
,
11677 struct objfile
*objfile
)
11679 struct dwarf2_per_cu_data
*this_cu
;
11683 high
= dwarf2_per_objfile
->n_comp_units
- 1;
11686 int mid
= low
+ (high
- low
) / 2;
11687 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
11692 gdb_assert (low
== high
);
11693 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
11696 error (_("Dwarf Error: could not find partial DIE containing "
11697 "offset 0x%lx [in module %s]"),
11698 (long) offset
, bfd_get_filename (objfile
->obfd
));
11700 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
11701 return dwarf2_per_objfile
->all_comp_units
[low
-1];
11705 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
11706 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
11707 && offset
>= this_cu
->offset
+ this_cu
->length
)
11708 error (_("invalid dwarf2 offset %u"), offset
);
11709 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
11714 /* Locate the compilation unit from OBJFILE which is located at exactly
11715 OFFSET. Raises an error on failure. */
11717 static struct dwarf2_per_cu_data
*
11718 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
11720 struct dwarf2_per_cu_data
*this_cu
;
11721 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
11722 if (this_cu
->offset
!= offset
)
11723 error (_("no compilation unit with offset %u."), offset
);
11727 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11729 static struct dwarf2_cu
*
11730 alloc_one_comp_unit (struct objfile
*objfile
)
11732 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
11733 cu
->objfile
= objfile
;
11734 obstack_init (&cu
->comp_unit_obstack
);
11738 /* Release one cached compilation unit, CU. We unlink it from the tree
11739 of compilation units, but we don't remove it from the read_in_chain;
11740 the caller is responsible for that.
11741 NOTE: DATA is a void * because this function is also used as a
11742 cleanup routine. */
11745 free_one_comp_unit (void *data
)
11747 struct dwarf2_cu
*cu
= data
;
11749 if (cu
->per_cu
!= NULL
)
11750 cu
->per_cu
->cu
= NULL
;
11753 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11758 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11759 when we're finished with it. We can't free the pointer itself, but be
11760 sure to unlink it from the cache. Also release any associated storage
11761 and perform cache maintenance.
11763 Only used during partial symbol parsing. */
11766 free_stack_comp_unit (void *data
)
11768 struct dwarf2_cu
*cu
= data
;
11770 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11771 cu
->partial_dies
= NULL
;
11773 if (cu
->per_cu
!= NULL
)
11775 /* This compilation unit is on the stack in our caller, so we
11776 should not xfree it. Just unlink it. */
11777 cu
->per_cu
->cu
= NULL
;
11780 /* If we had a per-cu pointer, then we may have other compilation
11781 units loaded, so age them now. */
11782 age_cached_comp_units ();
11786 /* Free all cached compilation units. */
11789 free_cached_comp_units (void *data
)
11791 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11793 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11794 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11795 while (per_cu
!= NULL
)
11797 struct dwarf2_per_cu_data
*next_cu
;
11799 next_cu
= per_cu
->cu
->read_in_chain
;
11801 free_one_comp_unit (per_cu
->cu
);
11802 *last_chain
= next_cu
;
11808 /* Increase the age counter on each cached compilation unit, and free
11809 any that are too old. */
11812 age_cached_comp_units (void)
11814 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11816 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
11817 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11818 while (per_cu
!= NULL
)
11820 per_cu
->cu
->last_used
++;
11821 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
11822 dwarf2_mark (per_cu
->cu
);
11823 per_cu
= per_cu
->cu
->read_in_chain
;
11826 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11827 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11828 while (per_cu
!= NULL
)
11830 struct dwarf2_per_cu_data
*next_cu
;
11832 next_cu
= per_cu
->cu
->read_in_chain
;
11834 if (!per_cu
->cu
->mark
)
11836 free_one_comp_unit (per_cu
->cu
);
11837 *last_chain
= next_cu
;
11840 last_chain
= &per_cu
->cu
->read_in_chain
;
11846 /* Remove a single compilation unit from the cache. */
11849 free_one_cached_comp_unit (void *target_cu
)
11851 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11853 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11854 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11855 while (per_cu
!= NULL
)
11857 struct dwarf2_per_cu_data
*next_cu
;
11859 next_cu
= per_cu
->cu
->read_in_chain
;
11861 if (per_cu
->cu
== target_cu
)
11863 free_one_comp_unit (per_cu
->cu
);
11864 *last_chain
= next_cu
;
11868 last_chain
= &per_cu
->cu
->read_in_chain
;
11874 /* Release all extra memory associated with OBJFILE. */
11877 dwarf2_free_objfile (struct objfile
*objfile
)
11879 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
11881 if (dwarf2_per_objfile
== NULL
)
11884 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11885 free_cached_comp_units (NULL
);
11887 /* Everything else should be on the objfile obstack. */
11890 /* A pair of DIE offset and GDB type pointer. We store these
11891 in a hash table separate from the DIEs, and preserve them
11892 when the DIEs are flushed out of cache. */
11894 struct dwarf2_offset_and_type
11896 unsigned int offset
;
11900 /* Hash function for a dwarf2_offset_and_type. */
11903 offset_and_type_hash (const void *item
)
11905 const struct dwarf2_offset_and_type
*ofs
= item
;
11906 return ofs
->offset
;
11909 /* Equality function for a dwarf2_offset_and_type. */
11912 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
11914 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
11915 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
11916 return ofs_lhs
->offset
== ofs_rhs
->offset
;
11919 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11920 table if necessary. For convenience, return TYPE. */
11922 static struct type
*
11923 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11925 struct dwarf2_offset_and_type
**slot
, ofs
;
11927 /* For Ada types, make sure that the gnat-specific data is always
11928 initialized (if not already set). There are a few types where
11929 we should not be doing so, because the type-specific area is
11930 already used to hold some other piece of info (eg: TYPE_CODE_FLT
11931 where the type-specific area is used to store the floatformat).
11932 But this is not a problem, because the gnat-specific information
11933 is actually not needed for these types. */
11934 if (need_gnat_info (cu
)
11935 && TYPE_CODE (type
) != TYPE_CODE_FUNC
11936 && TYPE_CODE (type
) != TYPE_CODE_FLT
11937 && !HAVE_GNAT_AUX_INFO (type
))
11938 INIT_GNAT_SPECIFIC (type
);
11940 if (cu
->type_hash
== NULL
)
11942 gdb_assert (cu
->per_cu
!= NULL
);
11943 cu
->per_cu
->type_hash
11944 = htab_create_alloc_ex (cu
->header
.length
/ 24,
11945 offset_and_type_hash
,
11946 offset_and_type_eq
,
11948 &cu
->objfile
->objfile_obstack
,
11949 hashtab_obstack_allocate
,
11950 dummy_obstack_deallocate
);
11951 cu
->type_hash
= cu
->per_cu
->type_hash
;
11954 ofs
.offset
= die
->offset
;
11956 slot
= (struct dwarf2_offset_and_type
**)
11957 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
11958 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
11963 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
11964 not have a saved type. */
11966 static struct type
*
11967 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11969 struct dwarf2_offset_and_type
*slot
, ofs
;
11970 htab_t type_hash
= cu
->type_hash
;
11972 if (type_hash
== NULL
)
11975 ofs
.offset
= die
->offset
;
11976 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
11983 /* Add a dependence relationship from CU to REF_PER_CU. */
11986 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
11987 struct dwarf2_per_cu_data
*ref_per_cu
)
11991 if (cu
->dependencies
== NULL
)
11993 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
11994 NULL
, &cu
->comp_unit_obstack
,
11995 hashtab_obstack_allocate
,
11996 dummy_obstack_deallocate
);
11998 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
12000 *slot
= ref_per_cu
;
12003 /* Subroutine of dwarf2_mark to pass to htab_traverse.
12004 Set the mark field in every compilation unit in the
12005 cache that we must keep because we are keeping CU. */
12008 dwarf2_mark_helper (void **slot
, void *data
)
12010 struct dwarf2_per_cu_data
*per_cu
;
12012 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
12013 if (per_cu
->cu
->mark
)
12015 per_cu
->cu
->mark
= 1;
12017 if (per_cu
->cu
->dependencies
!= NULL
)
12018 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
12023 /* Set the mark field in CU and in every other compilation unit in the
12024 cache that we must keep because we are keeping CU. */
12027 dwarf2_mark (struct dwarf2_cu
*cu
)
12032 if (cu
->dependencies
!= NULL
)
12033 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
12037 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
12041 per_cu
->cu
->mark
= 0;
12042 per_cu
= per_cu
->cu
->read_in_chain
;
12046 /* Trivial hash function for partial_die_info: the hash value of a DIE
12047 is its offset in .debug_info for this objfile. */
12050 partial_die_hash (const void *item
)
12052 const struct partial_die_info
*part_die
= item
;
12053 return part_die
->offset
;
12056 /* Trivial comparison function for partial_die_info structures: two DIEs
12057 are equal if they have the same offset. */
12060 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
12062 const struct partial_die_info
*part_die_lhs
= item_lhs
;
12063 const struct partial_die_info
*part_die_rhs
= item_rhs
;
12064 return part_die_lhs
->offset
== part_die_rhs
->offset
;
12067 static struct cmd_list_element
*set_dwarf2_cmdlist
;
12068 static struct cmd_list_element
*show_dwarf2_cmdlist
;
12071 set_dwarf2_cmd (char *args
, int from_tty
)
12073 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
12077 show_dwarf2_cmd (char *args
, int from_tty
)
12079 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
12082 /* If section described by INFO was mmapped, munmap it now. */
12085 munmap_section_buffer (struct dwarf2_section_info
*info
)
12087 if (info
->was_mmapped
)
12090 intptr_t begin
= (intptr_t) info
->buffer
;
12091 intptr_t map_begin
= begin
& ~(pagesize
- 1);
12092 size_t map_length
= info
->size
+ begin
- map_begin
;
12093 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
12095 /* Without HAVE_MMAP, we should never be here to begin with. */
12101 /* munmap debug sections for OBJFILE, if necessary. */
12104 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
12106 struct dwarf2_per_objfile
*data
= d
;
12107 munmap_section_buffer (&data
->info
);
12108 munmap_section_buffer (&data
->abbrev
);
12109 munmap_section_buffer (&data
->line
);
12110 munmap_section_buffer (&data
->str
);
12111 munmap_section_buffer (&data
->macinfo
);
12112 munmap_section_buffer (&data
->ranges
);
12113 munmap_section_buffer (&data
->loc
);
12114 munmap_section_buffer (&data
->frame
);
12115 munmap_section_buffer (&data
->eh_frame
);
12118 void _initialize_dwarf2_read (void);
12121 _initialize_dwarf2_read (void)
12123 dwarf2_objfile_data_key
12124 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
12126 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
12127 Set DWARF 2 specific variables.\n\
12128 Configure DWARF 2 variables such as the cache size"),
12129 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
12130 0/*allow-unknown*/, &maintenance_set_cmdlist
);
12132 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
12133 Show DWARF 2 specific variables\n\
12134 Show DWARF 2 variables such as the cache size"),
12135 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
12136 0/*allow-unknown*/, &maintenance_show_cmdlist
);
12138 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
12139 &dwarf2_max_cache_age
, _("\
12140 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
12141 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
12142 A higher limit means that cached compilation units will be stored\n\
12143 in memory longer, and more total memory will be used. Zero disables\n\
12144 caching, which can slow down startup."),
12146 show_dwarf2_max_cache_age
,
12147 &set_dwarf2_cmdlist
,
12148 &show_dwarf2_cmdlist
);
12150 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
12151 Set debugging of the dwarf2 DIE reader."), _("\
12152 Show debugging of the dwarf2 DIE reader."), _("\
12153 When enabled (non-zero), DIEs are dumped after they are read in.\n\
12154 The value is the maximum depth to print."),
12157 &setdebuglist
, &showdebuglist
);