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 Free Software Foundation, Inc.
6 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
7 Inc. with support from Florida State University (under contract
8 with the Ada Joint Program Office), and Silicon Graphics, Inc.
9 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
10 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
13 This file is part of GDB.
15 This program is free software; you can redistribute it and/or modify
16 it under the terms of the GNU General Public License as published by
17 the Free Software Foundation; either version 3 of the License, or
18 (at your option) any later version.
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
25 You should have received a copy of the GNU General Public License
26 along with this program. If not, see <http://www.gnu.org/licenses/>. */
33 #include "elf/dwarf2.h"
36 #include "expression.h"
37 #include "filenames.h" /* for DOSish file names */
40 #include "complaints.h"
42 #include "dwarf2expr.h"
43 #include "dwarf2loc.h"
44 #include "cp-support.h"
50 #include "gdb_string.h"
51 #include "gdb_assert.h"
52 #include <sys/types.h>
57 /* A note on memory usage for this file.
59 At the present time, this code reads the debug info sections into
60 the objfile's objfile_obstack. A definite improvement for startup
61 time, on platforms which do not emit relocations for debug
62 sections, would be to use mmap instead. The object's complete
63 debug information is loaded into memory, partly to simplify
64 absolute DIE references.
66 Whether using obstacks or mmap, the sections should remain loaded
67 until the objfile is released, and pointers into the section data
68 can be used for any other data associated to the objfile (symbol
69 names, type names, location expressions to name a few). */
72 /* .debug_info header for a compilation unit
73 Because of alignment constraints, this structure has padding and cannot
74 be mapped directly onto the beginning of the .debug_info section. */
75 typedef struct comp_unit_header
77 unsigned int length
; /* length of the .debug_info
79 unsigned short version
; /* version number -- 2 for DWARF
81 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
82 unsigned char addr_size
; /* byte size of an address -- 4 */
85 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
88 /* .debug_pubnames header
89 Because of alignment constraints, this structure has padding and cannot
90 be mapped directly onto the beginning of the .debug_info section. */
91 typedef struct pubnames_header
93 unsigned int length
; /* length of the .debug_pubnames
95 unsigned char version
; /* version number -- 2 for DWARF
97 unsigned int info_offset
; /* offset into .debug_info section */
98 unsigned int info_size
; /* byte size of .debug_info section
102 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
104 /* .debug_pubnames header
105 Because of alignment constraints, this structure has padding and cannot
106 be mapped directly onto the beginning of the .debug_info section. */
107 typedef struct aranges_header
109 unsigned int length
; /* byte len of the .debug_aranges
111 unsigned short version
; /* version number -- 2 for DWARF
113 unsigned int info_offset
; /* offset into .debug_info section */
114 unsigned char addr_size
; /* byte size of an address */
115 unsigned char seg_size
; /* byte size of segment descriptor */
118 #define _ACTUAL_ARANGES_HEADER_SIZE 12
120 /* .debug_line statement program prologue
121 Because of alignment constraints, this structure has padding and cannot
122 be mapped directly onto the beginning of the .debug_info section. */
123 typedef struct statement_prologue
125 unsigned int total_length
; /* byte length of the statement
127 unsigned short version
; /* version number -- 2 for DWARF
129 unsigned int prologue_length
; /* # bytes between prologue &
131 unsigned char minimum_instruction_length
; /* byte size of
133 unsigned char default_is_stmt
; /* initial value of is_stmt
136 unsigned char line_range
;
137 unsigned char opcode_base
; /* number assigned to first special
139 unsigned char *standard_opcode_lengths
;
143 static const struct objfile_data
*dwarf2_objfile_data_key
;
145 struct dwarf2_per_objfile
147 /* Sizes of debugging sections. */
148 unsigned int info_size
;
149 unsigned int abbrev_size
;
150 unsigned int line_size
;
151 unsigned int pubnames_size
;
152 unsigned int aranges_size
;
153 unsigned int loc_size
;
154 unsigned int macinfo_size
;
155 unsigned int str_size
;
156 unsigned int ranges_size
;
157 unsigned int frame_size
;
158 unsigned int eh_frame_size
;
160 /* Loaded data from the sections. */
161 gdb_byte
*info_buffer
;
162 gdb_byte
*abbrev_buffer
;
163 gdb_byte
*line_buffer
;
164 gdb_byte
*str_buffer
;
165 gdb_byte
*macinfo_buffer
;
166 gdb_byte
*ranges_buffer
;
167 gdb_byte
*loc_buffer
;
169 /* A list of all the compilation units. This is used to locate
170 the target compilation unit of a particular reference. */
171 struct dwarf2_per_cu_data
**all_comp_units
;
173 /* The number of compilation units in ALL_COMP_UNITS. */
176 /* A chain of compilation units that are currently read in, so that
177 they can be freed later. */
178 struct dwarf2_per_cu_data
*read_in_chain
;
180 /* A flag indicating wether this objfile has a section loaded at a
182 int has_section_at_zero
;
185 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
187 static asection
*dwarf_info_section
;
188 static asection
*dwarf_abbrev_section
;
189 static asection
*dwarf_line_section
;
190 static asection
*dwarf_pubnames_section
;
191 static asection
*dwarf_aranges_section
;
192 static asection
*dwarf_loc_section
;
193 static asection
*dwarf_macinfo_section
;
194 static asection
*dwarf_str_section
;
195 static asection
*dwarf_ranges_section
;
196 asection
*dwarf_frame_section
;
197 asection
*dwarf_eh_frame_section
;
199 /* names of the debugging sections */
201 /* Note that if the debugging section has been compressed, it might
202 have a name like .zdebug_info. */
204 #define INFO_SECTION "debug_info"
205 #define ABBREV_SECTION "debug_abbrev"
206 #define LINE_SECTION "debug_line"
207 #define PUBNAMES_SECTION "debug_pubnames"
208 #define ARANGES_SECTION "debug_aranges"
209 #define LOC_SECTION "debug_loc"
210 #define MACINFO_SECTION "debug_macinfo"
211 #define STR_SECTION "debug_str"
212 #define RANGES_SECTION "debug_ranges"
213 #define FRAME_SECTION "debug_frame"
214 #define EH_FRAME_SECTION "eh_frame"
216 /* local data types */
218 /* We hold several abbreviation tables in memory at the same time. */
219 #ifndef ABBREV_HASH_SIZE
220 #define ABBREV_HASH_SIZE 121
223 /* The data in a compilation unit header, after target2host
224 translation, looks like this. */
225 struct comp_unit_head
227 unsigned long length
;
229 unsigned int abbrev_offset
;
230 unsigned char addr_size
;
231 unsigned char signed_addr_p
;
233 /* Size of file offsets; either 4 or 8. */
234 unsigned int offset_size
;
236 /* Size of the length field; either 4 or 12. */
237 unsigned int initial_length_size
;
239 /* Offset to the first byte of this compilation unit header in the
240 .debug_info section, for resolving relative reference dies. */
243 /* Pointer to this compilation unit header in the .debug_info
245 gdb_byte
*cu_head_ptr
;
247 /* Pointer to the first die of this compilation unit. This will be
248 the first byte following the compilation unit header. */
249 gdb_byte
*first_die_ptr
;
251 /* Pointer to the next compilation unit header in the program. */
252 struct comp_unit_head
*next
;
254 /* Base address of this compilation unit. */
255 CORE_ADDR base_address
;
257 /* Non-zero if base_address has been set. */
261 /* Fixed size for the DIE hash table. */
262 #ifndef REF_HASH_SIZE
263 #define REF_HASH_SIZE 1021
266 /* Internal state when decoding a particular compilation unit. */
269 /* The objfile containing this compilation unit. */
270 struct objfile
*objfile
;
272 /* The header of the compilation unit.
274 FIXME drow/2003-11-10: Some of the things from the comp_unit_head
275 should logically be moved to the dwarf2_cu structure. */
276 struct comp_unit_head header
;
278 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
280 /* The language we are debugging. */
281 enum language language
;
282 const struct language_defn
*language_defn
;
284 const char *producer
;
286 /* The generic symbol table building routines have separate lists for
287 file scope symbols and all all other scopes (local scopes). So
288 we need to select the right one to pass to add_symbol_to_list().
289 We do it by keeping a pointer to the correct list in list_in_scope.
291 FIXME: The original dwarf code just treated the file scope as the
292 first local scope, and all other local scopes as nested local
293 scopes, and worked fine. Check to see if we really need to
294 distinguish these in buildsym.c. */
295 struct pending
**list_in_scope
;
297 /* DWARF abbreviation table associated with this compilation unit. */
298 struct abbrev_info
**dwarf2_abbrevs
;
300 /* Storage for the abbrev table. */
301 struct obstack abbrev_obstack
;
303 /* Hash table holding all the loaded partial DIEs. */
306 /* Storage for things with the same lifetime as this read-in compilation
307 unit, including partial DIEs. */
308 struct obstack comp_unit_obstack
;
310 /* When multiple dwarf2_cu structures are living in memory, this field
311 chains them all together, so that they can be released efficiently.
312 We will probably also want a generation counter so that most-recently-used
313 compilation units are cached... */
314 struct dwarf2_per_cu_data
*read_in_chain
;
316 /* Backchain to our per_cu entry if the tree has been built. */
317 struct dwarf2_per_cu_data
*per_cu
;
319 /* How many compilation units ago was this CU last referenced? */
322 /* A hash table of die offsets for following references. */
323 struct die_info
*die_ref_table
[REF_HASH_SIZE
];
325 /* Full DIEs if read in. */
326 struct die_info
*dies
;
328 /* A set of pointers to dwarf2_per_cu_data objects for compilation
329 units referenced by this one. Only set during full symbol processing;
330 partial symbol tables do not have dependencies. */
333 /* Header data from the line table, during full symbol processing. */
334 struct line_header
*line_header
;
336 /* Mark used when releasing cached dies. */
337 unsigned int mark
: 1;
339 /* This flag will be set if this compilation unit might include
340 inter-compilation-unit references. */
341 unsigned int has_form_ref_addr
: 1;
343 /* This flag will be set if this compilation unit includes any
344 DW_TAG_namespace DIEs. If we know that there are explicit
345 DIEs for namespaces, we don't need to try to infer them
346 from mangled names. */
347 unsigned int has_namespace_info
: 1;
350 /* Persistent data held for a compilation unit, even when not
351 processing it. We put a pointer to this structure in the
352 read_symtab_private field of the psymtab. If we encounter
353 inter-compilation-unit references, we also maintain a sorted
354 list of all compilation units. */
356 struct dwarf2_per_cu_data
358 /* The start offset and length of this compilation unit. 2**30-1
359 bytes should suffice to store the length of any compilation unit
360 - if it doesn't, GDB will fall over anyway. */
361 unsigned long offset
;
362 unsigned long length
: 30;
364 /* Flag indicating this compilation unit will be read in before
365 any of the current compilation units are processed. */
366 unsigned long queued
: 1;
368 /* This flag will be set if we need to load absolutely all DIEs
369 for this compilation unit, instead of just the ones we think
370 are interesting. It gets set if we look for a DIE in the
371 hash table and don't find it. */
372 unsigned int load_all_dies
: 1;
374 /* Set iff currently read in. */
375 struct dwarf2_cu
*cu
;
377 /* If full symbols for this CU have been read in, then this field
378 holds a map of DIE offsets to types. It isn't always possible
379 to reconstruct this information later, so we have to preserve
383 /* The partial symbol table associated with this compilation unit,
384 or NULL for partial units (which do not have an associated
386 struct partial_symtab
*psymtab
;
389 /* The line number information for a compilation unit (found in the
390 .debug_line section) begins with a "statement program header",
391 which contains the following information. */
394 unsigned int total_length
;
395 unsigned short version
;
396 unsigned int header_length
;
397 unsigned char minimum_instruction_length
;
398 unsigned char default_is_stmt
;
400 unsigned char line_range
;
401 unsigned char opcode_base
;
403 /* standard_opcode_lengths[i] is the number of operands for the
404 standard opcode whose value is i. This means that
405 standard_opcode_lengths[0] is unused, and the last meaningful
406 element is standard_opcode_lengths[opcode_base - 1]. */
407 unsigned char *standard_opcode_lengths
;
409 /* The include_directories table. NOTE! These strings are not
410 allocated with xmalloc; instead, they are pointers into
411 debug_line_buffer. If you try to free them, `free' will get
413 unsigned int num_include_dirs
, include_dirs_size
;
416 /* The file_names table. NOTE! These strings are not allocated
417 with xmalloc; instead, they are pointers into debug_line_buffer.
418 Don't try to free them directly. */
419 unsigned int num_file_names
, file_names_size
;
423 unsigned int dir_index
;
424 unsigned int mod_time
;
426 int included_p
; /* Non-zero if referenced by the Line Number Program. */
427 struct symtab
*symtab
; /* The associated symbol table, if any. */
430 /* The start and end of the statement program following this
431 header. These point into dwarf2_per_objfile->line_buffer. */
432 gdb_byte
*statement_program_start
, *statement_program_end
;
435 /* When we construct a partial symbol table entry we only
436 need this much information. */
437 struct partial_die_info
439 /* Offset of this DIE. */
442 /* DWARF-2 tag for this DIE. */
443 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
445 /* Language code associated with this DIE. This is only used
446 for the compilation unit DIE. */
447 unsigned int language
: 8;
449 /* Assorted flags describing the data found in this DIE. */
450 unsigned int has_children
: 1;
451 unsigned int is_external
: 1;
452 unsigned int is_declaration
: 1;
453 unsigned int has_type
: 1;
454 unsigned int has_specification
: 1;
455 unsigned int has_stmt_list
: 1;
456 unsigned int has_pc_info
: 1;
458 /* Flag set if the SCOPE field of this structure has been
460 unsigned int scope_set
: 1;
462 /* Flag set if the DIE has a byte_size attribute. */
463 unsigned int has_byte_size
: 1;
465 /* The name of this DIE. Normally the value of DW_AT_name, but
466 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
471 /* The scope to prepend to our children. This is generally
472 allocated on the comp_unit_obstack, so will disappear
473 when this compilation unit leaves the cache. */
476 /* The location description associated with this DIE, if any. */
477 struct dwarf_block
*locdesc
;
479 /* If HAS_PC_INFO, the PC range associated with this DIE. */
483 /* Pointer into the info_buffer pointing at the target of
484 DW_AT_sibling, if any. */
487 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
488 DW_AT_specification (or DW_AT_abstract_origin or
490 unsigned int spec_offset
;
492 /* If HAS_STMT_LIST, the offset of the Line Number Information data. */
493 unsigned int line_offset
;
495 /* Pointers to this DIE's parent, first child, and next sibling,
497 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
500 /* This data structure holds the information of an abbrev. */
503 unsigned int number
; /* number identifying abbrev */
504 enum dwarf_tag tag
; /* dwarf tag */
505 unsigned short has_children
; /* boolean */
506 unsigned short num_attrs
; /* number of attributes */
507 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
508 struct abbrev_info
*next
; /* next in chain */
513 enum dwarf_attribute name
;
514 enum dwarf_form form
;
517 /* This data structure holds a complete die structure. */
520 enum dwarf_tag tag
; /* Tag indicating type of die */
521 unsigned int abbrev
; /* Abbrev number */
522 unsigned int offset
; /* Offset in .debug_info section */
523 unsigned int num_attrs
; /* Number of attributes */
524 struct attribute
*attrs
; /* An array of attributes */
525 struct die_info
*next_ref
; /* Next die in ref hash table */
527 /* The dies in a compilation unit form an n-ary tree. PARENT
528 points to this die's parent; CHILD points to the first child of
529 this node; and all the children of a given node are chained
530 together via their SIBLING fields, terminated by a die whose
532 struct die_info
*child
; /* Its first child, if any. */
533 struct die_info
*sibling
; /* Its next sibling, if any. */
534 struct die_info
*parent
; /* Its parent, if any. */
536 struct type
*type
; /* Cached type information */
539 /* Attributes have a name and a value */
542 enum dwarf_attribute name
;
543 enum dwarf_form form
;
547 struct dwarf_block
*blk
;
555 struct function_range
558 CORE_ADDR lowpc
, highpc
;
560 struct function_range
*next
;
563 /* Get at parts of an attribute structure */
565 #define DW_STRING(attr) ((attr)->u.str)
566 #define DW_UNSND(attr) ((attr)->u.unsnd)
567 #define DW_BLOCK(attr) ((attr)->u.blk)
568 #define DW_SND(attr) ((attr)->u.snd)
569 #define DW_ADDR(attr) ((attr)->u.addr)
571 /* Blocks are a bunch of untyped bytes. */
578 #ifndef ATTR_ALLOC_CHUNK
579 #define ATTR_ALLOC_CHUNK 4
582 /* Allocate fields for structs, unions and enums in this size. */
583 #ifndef DW_FIELD_ALLOC_CHUNK
584 #define DW_FIELD_ALLOC_CHUNK 4
587 /* A zeroed version of a partial die for initialization purposes. */
588 static struct partial_die_info zeroed_partial_die
;
590 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
591 but this would require a corresponding change in unpack_field_as_long
593 static int bits_per_byte
= 8;
595 /* The routines that read and process dies for a C struct or C++ class
596 pass lists of data member fields and lists of member function fields
597 in an instance of a field_info structure, as defined below. */
600 /* List of data member and baseclasses fields. */
603 struct nextfield
*next
;
610 /* Number of fields. */
613 /* Number of baseclasses. */
616 /* Set if the accesibility of one of the fields is not public. */
617 int non_public_fields
;
619 /* Member function fields array, entries are allocated in the order they
620 are encountered in the object file. */
623 struct nextfnfield
*next
;
624 struct fn_field fnfield
;
628 /* Member function fieldlist array, contains name of possibly overloaded
629 member function, number of overloaded member functions and a pointer
630 to the head of the member function field chain. */
635 struct nextfnfield
*head
;
639 /* Number of entries in the fnfieldlists array. */
643 /* One item on the queue of compilation units to read in full symbols
645 struct dwarf2_queue_item
647 struct dwarf2_per_cu_data
*per_cu
;
648 struct dwarf2_queue_item
*next
;
651 /* The current queue. */
652 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
654 /* Loaded secondary compilation units are kept in memory until they
655 have not been referenced for the processing of this many
656 compilation units. Set this to zero to disable caching. Cache
657 sizes of up to at least twenty will improve startup time for
658 typical inter-CU-reference binaries, at an obvious memory cost. */
659 static int dwarf2_max_cache_age
= 5;
661 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
662 struct cmd_list_element
*c
, const char *value
)
664 fprintf_filtered (file
, _("\
665 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
670 /* Various complaints about symbol reading that don't abort the process */
673 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
675 complaint (&symfile_complaints
,
676 _("statement list doesn't fit in .debug_line section"));
680 dwarf2_debug_line_missing_file_complaint (void)
682 complaint (&symfile_complaints
,
683 _(".debug_line section has line data without a file"));
687 dwarf2_complex_location_expr_complaint (void)
689 complaint (&symfile_complaints
, _("location expression too complex"));
693 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
696 complaint (&symfile_complaints
,
697 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
702 dwarf2_macros_too_long_complaint (void)
704 complaint (&symfile_complaints
,
705 _("macro info runs off end of `.debug_macinfo' section"));
709 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
711 complaint (&symfile_complaints
,
712 _("macro debug info contains a malformed macro definition:\n`%s'"),
717 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
719 complaint (&symfile_complaints
,
720 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
723 /* local function prototypes */
725 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
728 static void dwarf2_build_psymtabs_easy (struct objfile
*, int);
731 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
734 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
735 struct partial_die_info
*,
736 struct partial_symtab
*);
738 static void dwarf2_build_psymtabs_hard (struct objfile
*, int);
740 static void scan_partial_symbols (struct partial_die_info
*,
741 CORE_ADDR
*, CORE_ADDR
*,
744 static void add_partial_symbol (struct partial_die_info
*,
747 static int pdi_needs_namespace (enum dwarf_tag tag
);
749 static void add_partial_namespace (struct partial_die_info
*pdi
,
750 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
751 struct dwarf2_cu
*cu
);
753 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
754 struct dwarf2_cu
*cu
);
756 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
759 struct dwarf2_cu
*cu
);
761 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
763 static void psymtab_to_symtab_1 (struct partial_symtab
*);
765 gdb_byte
*dwarf2_read_section (struct objfile
*, asection
*);
767 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
769 static void dwarf2_free_abbrev_table (void *);
771 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
774 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
777 static struct partial_die_info
*load_partial_dies (bfd
*, gdb_byte
*, int,
780 static gdb_byte
*read_partial_die (struct partial_die_info
*,
781 struct abbrev_info
*abbrev
, unsigned int,
782 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
784 static struct partial_die_info
*find_partial_die (unsigned long,
787 static void fixup_partial_die (struct partial_die_info
*,
790 static gdb_byte
*read_full_die (struct die_info
**, bfd
*, gdb_byte
*,
791 struct dwarf2_cu
*, int *);
793 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
794 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
796 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
797 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
799 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
801 static int read_1_signed_byte (bfd
*, gdb_byte
*);
803 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
805 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
807 static unsigned long read_8_bytes (bfd
*, gdb_byte
*);
809 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
812 static LONGEST
read_initial_length (bfd
*, gdb_byte
*,
813 struct comp_unit_head
*, unsigned int *);
815 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
818 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
820 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
822 static char *read_indirect_string (bfd
*, gdb_byte
*,
823 const struct comp_unit_head
*,
826 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
828 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
830 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
832 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
834 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
837 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
838 struct dwarf2_cu
*cu
);
840 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
842 static struct die_info
*die_specification (struct die_info
*die
,
845 static void free_line_header (struct line_header
*lh
);
847 static void add_file_name (struct line_header
*, char *, unsigned int,
848 unsigned int, unsigned int);
850 static struct line_header
*(dwarf_decode_line_header
851 (unsigned int offset
,
852 bfd
*abfd
, struct dwarf2_cu
*cu
));
854 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
855 struct dwarf2_cu
*, struct partial_symtab
*);
857 static void dwarf2_start_subfile (char *, char *, char *);
859 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
862 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
865 static void dwarf2_const_value_data (struct attribute
*attr
,
869 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
871 static struct type
*die_containing_type (struct die_info
*,
874 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
876 static void read_type_die (struct die_info
*, struct dwarf2_cu
*);
878 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
880 static char *typename_concat (struct obstack
*,
885 static void read_typedef (struct die_info
*, struct dwarf2_cu
*);
887 static void read_base_type (struct die_info
*, struct dwarf2_cu
*);
889 static void read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
891 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
893 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
895 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
897 static int dwarf2_get_pc_bounds (struct die_info
*,
898 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*);
900 static void get_scope_pc_bounds (struct die_info
*,
901 CORE_ADDR
*, CORE_ADDR
*,
904 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
905 CORE_ADDR
, struct dwarf2_cu
*);
907 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
910 static void dwarf2_attach_fields_to_type (struct field_info
*,
911 struct type
*, struct dwarf2_cu
*);
913 static void dwarf2_add_member_fn (struct field_info
*,
914 struct die_info
*, struct type
*,
917 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
918 struct type
*, struct dwarf2_cu
*);
920 static void read_structure_type (struct die_info
*, struct dwarf2_cu
*);
922 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
924 static char *determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
926 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
928 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
930 static const char *namespace_name (struct die_info
*die
,
931 int *is_anonymous
, struct dwarf2_cu
*);
933 static void read_enumeration_type (struct die_info
*, struct dwarf2_cu
*);
935 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
937 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
939 static void read_array_type (struct die_info
*, struct dwarf2_cu
*);
941 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
944 static void read_tag_pointer_type (struct die_info
*, struct dwarf2_cu
*);
946 static void read_tag_ptr_to_member_type (struct die_info
*,
949 static void read_tag_reference_type (struct die_info
*, struct dwarf2_cu
*);
951 static void read_tag_const_type (struct die_info
*, struct dwarf2_cu
*);
953 static void read_tag_volatile_type (struct die_info
*, struct dwarf2_cu
*);
955 static void read_tag_string_type (struct die_info
*, struct dwarf2_cu
*);
957 static void read_subroutine_type (struct die_info
*, struct dwarf2_cu
*);
959 static struct die_info
*read_comp_unit (gdb_byte
*, bfd
*, struct dwarf2_cu
*);
961 static struct die_info
*read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
963 gdb_byte
**new_info_ptr
,
964 struct die_info
*parent
);
966 static struct die_info
*read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
968 gdb_byte
**new_info_ptr
,
969 struct die_info
*parent
);
971 static void free_die_list (struct die_info
*);
973 static void process_die (struct die_info
*, struct dwarf2_cu
*);
975 static char *dwarf2_linkage_name (struct die_info
*, struct dwarf2_cu
*);
977 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
979 static struct die_info
*dwarf2_extension (struct die_info
*die
,
982 static char *dwarf_tag_name (unsigned int);
984 static char *dwarf_attr_name (unsigned int);
986 static char *dwarf_form_name (unsigned int);
988 static char *dwarf_stack_op_name (unsigned int);
990 static char *dwarf_bool_name (unsigned int);
992 static char *dwarf_type_encoding_name (unsigned int);
995 static char *dwarf_cfi_name (unsigned int);
997 struct die_info
*copy_die (struct die_info
*);
1000 static struct die_info
*sibling_die (struct die_info
*);
1002 static void dump_die (struct die_info
*);
1004 static void dump_die_list (struct die_info
*);
1006 static void store_in_ref_table (unsigned int, struct die_info
*,
1007 struct dwarf2_cu
*);
1009 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*,
1010 struct dwarf2_cu
*);
1012 static int dwarf2_get_attr_constant_value (struct attribute
*, int);
1014 static struct die_info
*follow_die_ref (struct die_info
*,
1016 struct dwarf2_cu
*);
1018 /* memory allocation interface */
1020 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1022 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1024 static struct die_info
*dwarf_alloc_die (void);
1026 static void initialize_cu_func_list (struct dwarf2_cu
*);
1028 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1029 struct dwarf2_cu
*);
1031 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1032 char *, bfd
*, struct dwarf2_cu
*);
1034 static int attr_form_is_block (struct attribute
*);
1036 static int attr_form_is_section_offset (struct attribute
*);
1038 static int attr_form_is_constant (struct attribute
*);
1040 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1042 struct dwarf2_cu
*cu
);
1044 static gdb_byte
*skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
1045 struct dwarf2_cu
*cu
);
1047 static void free_stack_comp_unit (void *);
1049 static hashval_t
partial_die_hash (const void *item
);
1051 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1053 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1054 (unsigned long offset
, struct objfile
*objfile
);
1056 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1057 (unsigned long offset
, struct objfile
*objfile
);
1059 static void free_one_comp_unit (void *);
1061 static void free_cached_comp_units (void *);
1063 static void age_cached_comp_units (void);
1065 static void free_one_cached_comp_unit (void *);
1067 static void set_die_type (struct die_info
*, struct type
*,
1068 struct dwarf2_cu
*);
1070 static void reset_die_and_siblings_types (struct die_info
*,
1071 struct dwarf2_cu
*);
1073 static void create_all_comp_units (struct objfile
*);
1075 static struct dwarf2_cu
*load_full_comp_unit (struct dwarf2_per_cu_data
*,
1078 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1080 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1081 struct dwarf2_per_cu_data
*);
1083 static void dwarf2_mark (struct dwarf2_cu
*);
1085 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1087 static void read_set_type (struct die_info
*, struct dwarf2_cu
*);
1090 /* Try to locate the sections we need for DWARF 2 debugging
1091 information and return true if we have enough to do something. */
1094 dwarf2_has_info (struct objfile
*objfile
)
1096 struct dwarf2_per_objfile
*data
;
1098 /* Initialize per-objfile state. */
1099 data
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1100 memset (data
, 0, sizeof (*data
));
1101 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1102 dwarf2_per_objfile
= data
;
1104 dwarf_info_section
= 0;
1105 dwarf_abbrev_section
= 0;
1106 dwarf_line_section
= 0;
1107 dwarf_str_section
= 0;
1108 dwarf_macinfo_section
= 0;
1109 dwarf_frame_section
= 0;
1110 dwarf_eh_frame_section
= 0;
1111 dwarf_ranges_section
= 0;
1112 dwarf_loc_section
= 0;
1114 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1115 return (dwarf_info_section
!= NULL
&& dwarf_abbrev_section
!= NULL
);
1118 /* When loading sections, we can either look for ".<name>", or for
1119 * ".z<name>", which indicates a compressed section. */
1122 section_is_p (asection
*sectp
, const char *name
)
1124 return ((sectp
->name
[0] == '.'
1125 && strcmp (sectp
->name
+ 1, name
) == 0)
1126 || (sectp
->name
[0] == '.' && sectp
->name
[1] == 'z'
1127 && strcmp (sectp
->name
+ 2, name
) == 0));
1130 /* This function is mapped across the sections and remembers the
1131 offset and size of each of the debugging sections we are interested
1135 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1137 if (section_is_p (sectp
, INFO_SECTION
))
1139 dwarf2_per_objfile
->info_size
= bfd_get_section_size (sectp
);
1140 dwarf_info_section
= sectp
;
1142 else if (section_is_p (sectp
, ABBREV_SECTION
))
1144 dwarf2_per_objfile
->abbrev_size
= bfd_get_section_size (sectp
);
1145 dwarf_abbrev_section
= sectp
;
1147 else if (section_is_p (sectp
, LINE_SECTION
))
1149 dwarf2_per_objfile
->line_size
= bfd_get_section_size (sectp
);
1150 dwarf_line_section
= sectp
;
1152 else if (section_is_p (sectp
, PUBNAMES_SECTION
))
1154 dwarf2_per_objfile
->pubnames_size
= bfd_get_section_size (sectp
);
1155 dwarf_pubnames_section
= sectp
;
1157 else if (section_is_p (sectp
, ARANGES_SECTION
))
1159 dwarf2_per_objfile
->aranges_size
= bfd_get_section_size (sectp
);
1160 dwarf_aranges_section
= sectp
;
1162 else if (section_is_p (sectp
, LOC_SECTION
))
1164 dwarf2_per_objfile
->loc_size
= bfd_get_section_size (sectp
);
1165 dwarf_loc_section
= sectp
;
1167 else if (section_is_p (sectp
, MACINFO_SECTION
))
1169 dwarf2_per_objfile
->macinfo_size
= bfd_get_section_size (sectp
);
1170 dwarf_macinfo_section
= sectp
;
1172 else if (section_is_p (sectp
, STR_SECTION
))
1174 dwarf2_per_objfile
->str_size
= bfd_get_section_size (sectp
);
1175 dwarf_str_section
= sectp
;
1177 else if (section_is_p (sectp
, FRAME_SECTION
))
1179 dwarf2_per_objfile
->frame_size
= bfd_get_section_size (sectp
);
1180 dwarf_frame_section
= sectp
;
1182 else if (section_is_p (sectp
, EH_FRAME_SECTION
))
1184 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1185 if (aflag
& SEC_HAS_CONTENTS
)
1187 dwarf2_per_objfile
->eh_frame_size
= bfd_get_section_size (sectp
);
1188 dwarf_eh_frame_section
= sectp
;
1191 else if (section_is_p (sectp
, RANGES_SECTION
))
1193 dwarf2_per_objfile
->ranges_size
= bfd_get_section_size (sectp
);
1194 dwarf_ranges_section
= sectp
;
1197 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1198 && bfd_section_vma (abfd
, sectp
) == 0)
1199 dwarf2_per_objfile
->has_section_at_zero
= 1;
1202 /* This function is called after decompressing a section, so
1203 dwarf2_per_objfile can record its new, uncompressed size. */
1206 dwarf2_resize_section (asection
*sectp
, bfd_size_type new_size
)
1208 if (section_is_p (sectp
, INFO_SECTION
))
1209 dwarf2_per_objfile
->info_size
= new_size
;
1210 else if (section_is_p (sectp
, ABBREV_SECTION
))
1211 dwarf2_per_objfile
->abbrev_size
= new_size
;
1212 else if (section_is_p (sectp
, LINE_SECTION
))
1213 dwarf2_per_objfile
->line_size
= new_size
;
1214 else if (section_is_p (sectp
, PUBNAMES_SECTION
))
1215 dwarf2_per_objfile
->pubnames_size
= new_size
;
1216 else if (section_is_p (sectp
, ARANGES_SECTION
))
1217 dwarf2_per_objfile
->aranges_size
= new_size
;
1218 else if (section_is_p (sectp
, LOC_SECTION
))
1219 dwarf2_per_objfile
->loc_size
= new_size
;
1220 else if (section_is_p (sectp
, MACINFO_SECTION
))
1221 dwarf2_per_objfile
->macinfo_size
= new_size
;
1222 else if (section_is_p (sectp
, STR_SECTION
))
1223 dwarf2_per_objfile
->str_size
= new_size
;
1224 else if (section_is_p (sectp
, FRAME_SECTION
))
1225 dwarf2_per_objfile
->frame_size
= new_size
;
1226 else if (section_is_p (sectp
, EH_FRAME_SECTION
))
1227 dwarf2_per_objfile
->eh_frame_size
= new_size
;
1228 else if (section_is_p (sectp
, RANGES_SECTION
))
1229 dwarf2_per_objfile
->ranges_size
= new_size
;
1231 internal_error (__FILE__
, __LINE__
,
1232 _("dwarf2_resize_section: missing section_is_p check: %s"),
1236 /* Build a partial symbol table. */
1239 dwarf2_build_psymtabs (struct objfile
*objfile
, int mainline
)
1241 /* We definitely need the .debug_info and .debug_abbrev sections */
1243 dwarf2_per_objfile
->info_buffer
= dwarf2_read_section (objfile
, dwarf_info_section
);
1244 dwarf2_per_objfile
->abbrev_buffer
= dwarf2_read_section (objfile
, dwarf_abbrev_section
);
1246 if (dwarf_line_section
)
1247 dwarf2_per_objfile
->line_buffer
= dwarf2_read_section (objfile
, dwarf_line_section
);
1249 dwarf2_per_objfile
->line_buffer
= NULL
;
1251 if (dwarf_str_section
)
1252 dwarf2_per_objfile
->str_buffer
= dwarf2_read_section (objfile
, dwarf_str_section
);
1254 dwarf2_per_objfile
->str_buffer
= NULL
;
1256 if (dwarf_macinfo_section
)
1257 dwarf2_per_objfile
->macinfo_buffer
= dwarf2_read_section (objfile
,
1258 dwarf_macinfo_section
);
1260 dwarf2_per_objfile
->macinfo_buffer
= NULL
;
1262 if (dwarf_ranges_section
)
1263 dwarf2_per_objfile
->ranges_buffer
= dwarf2_read_section (objfile
, dwarf_ranges_section
);
1265 dwarf2_per_objfile
->ranges_buffer
= NULL
;
1267 if (dwarf_loc_section
)
1268 dwarf2_per_objfile
->loc_buffer
= dwarf2_read_section (objfile
, dwarf_loc_section
);
1270 dwarf2_per_objfile
->loc_buffer
= NULL
;
1273 || (objfile
->global_psymbols
.size
== 0
1274 && objfile
->static_psymbols
.size
== 0))
1276 init_psymbol_list (objfile
, 1024);
1280 if (dwarf_aranges_offset
&& dwarf_pubnames_offset
)
1282 /* Things are significantly easier if we have .debug_aranges and
1283 .debug_pubnames sections */
1285 dwarf2_build_psymtabs_easy (objfile
, mainline
);
1289 /* only test this case for now */
1291 /* In this case we have to work a bit harder */
1292 dwarf2_build_psymtabs_hard (objfile
, mainline
);
1297 /* Build the partial symbol table from the information in the
1298 .debug_pubnames and .debug_aranges sections. */
1301 dwarf2_build_psymtabs_easy (struct objfile
*objfile
, int mainline
)
1303 bfd
*abfd
= objfile
->obfd
;
1304 char *aranges_buffer
, *pubnames_buffer
;
1305 char *aranges_ptr
, *pubnames_ptr
;
1306 unsigned int entry_length
, version
, info_offset
, info_size
;
1308 pubnames_buffer
= dwarf2_read_section (objfile
,
1309 dwarf_pubnames_section
);
1310 pubnames_ptr
= pubnames_buffer
;
1311 while ((pubnames_ptr
- pubnames_buffer
) < dwarf2_per_objfile
->pubnames_size
)
1313 struct comp_unit_head cu_header
;
1314 unsigned int bytes_read
;
1316 entry_length
= read_initial_length (abfd
, pubnames_ptr
, &cu_header
,
1318 pubnames_ptr
+= bytes_read
;
1319 version
= read_1_byte (abfd
, pubnames_ptr
);
1321 info_offset
= read_4_bytes (abfd
, pubnames_ptr
);
1323 info_size
= read_4_bytes (abfd
, pubnames_ptr
);
1327 aranges_buffer
= dwarf2_read_section (objfile
,
1328 dwarf_aranges_section
);
1333 /* Read in the comp unit header information from the debug_info at
1337 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1338 gdb_byte
*info_ptr
, bfd
*abfd
)
1341 unsigned int bytes_read
;
1342 cu_header
->length
= read_initial_length (abfd
, info_ptr
, cu_header
,
1344 info_ptr
+= bytes_read
;
1345 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1347 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1349 info_ptr
+= bytes_read
;
1350 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1352 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1353 if (signed_addr
< 0)
1354 internal_error (__FILE__
, __LINE__
,
1355 _("read_comp_unit_head: dwarf from non elf file"));
1356 cu_header
->signed_addr_p
= signed_addr
;
1361 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1364 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1366 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1368 if (header
->version
!= 2 && header
->version
!= 3)
1369 error (_("Dwarf Error: wrong version in compilation unit header "
1370 "(is %d, should be %d) [in module %s]"), header
->version
,
1371 2, bfd_get_filename (abfd
));
1373 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev_size
)
1374 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1375 "(offset 0x%lx + 6) [in module %s]"),
1376 (long) header
->abbrev_offset
,
1377 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
),
1378 bfd_get_filename (abfd
));
1380 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1381 > dwarf2_per_objfile
->info_buffer
+ dwarf2_per_objfile
->info_size
)
1382 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1383 "(offset 0x%lx + 0) [in module %s]"),
1384 (long) header
->length
,
1385 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
),
1386 bfd_get_filename (abfd
));
1391 /* Allocate a new partial symtab for file named NAME and mark this new
1392 partial symtab as being an include of PST. */
1395 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1396 struct objfile
*objfile
)
1398 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1400 subpst
->section_offsets
= pst
->section_offsets
;
1401 subpst
->textlow
= 0;
1402 subpst
->texthigh
= 0;
1404 subpst
->dependencies
= (struct partial_symtab
**)
1405 obstack_alloc (&objfile
->objfile_obstack
,
1406 sizeof (struct partial_symtab
*));
1407 subpst
->dependencies
[0] = pst
;
1408 subpst
->number_of_dependencies
= 1;
1410 subpst
->globals_offset
= 0;
1411 subpst
->n_global_syms
= 0;
1412 subpst
->statics_offset
= 0;
1413 subpst
->n_static_syms
= 0;
1414 subpst
->symtab
= NULL
;
1415 subpst
->read_symtab
= pst
->read_symtab
;
1418 /* No private part is necessary for include psymtabs. This property
1419 can be used to differentiate between such include psymtabs and
1420 the regular ones. */
1421 subpst
->read_symtab_private
= NULL
;
1424 /* Read the Line Number Program data and extract the list of files
1425 included by the source file represented by PST. Build an include
1426 partial symtab for each of these included files.
1428 This procedure assumes that there *is* a Line Number Program in
1429 the given CU. Callers should check that PDI->HAS_STMT_LIST is set
1430 before calling this procedure. */
1433 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1434 struct partial_die_info
*pdi
,
1435 struct partial_symtab
*pst
)
1437 struct objfile
*objfile
= cu
->objfile
;
1438 bfd
*abfd
= objfile
->obfd
;
1439 struct line_header
*lh
;
1441 lh
= dwarf_decode_line_header (pdi
->line_offset
, abfd
, cu
);
1443 return; /* No linetable, so no includes. */
1445 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1447 free_line_header (lh
);
1451 /* Build the partial symbol table by doing a quick pass through the
1452 .debug_info and .debug_abbrev sections. */
1455 dwarf2_build_psymtabs_hard (struct objfile
*objfile
, int mainline
)
1457 /* Instead of reading this into a big buffer, we should probably use
1458 mmap() on architectures that support it. (FIXME) */
1459 bfd
*abfd
= objfile
->obfd
;
1461 gdb_byte
*beg_of_comp_unit
;
1462 struct partial_die_info comp_unit_die
;
1463 struct partial_symtab
*pst
;
1464 struct cleanup
*back_to
;
1465 CORE_ADDR lowpc
, highpc
, baseaddr
;
1467 info_ptr
= dwarf2_per_objfile
->info_buffer
;
1469 /* Any cached compilation units will be linked by the per-objfile
1470 read_in_chain. Make sure to free them when we're done. */
1471 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1473 create_all_comp_units (objfile
);
1475 /* Since the objects we're extracting from .debug_info vary in
1476 length, only the individual functions to extract them (like
1477 read_comp_unit_head and load_partial_die) can really know whether
1478 the buffer is large enough to hold another complete object.
1480 At the moment, they don't actually check that. If .debug_info
1481 holds just one extra byte after the last compilation unit's dies,
1482 then read_comp_unit_head will happily read off the end of the
1483 buffer. read_partial_die is similarly casual. Those functions
1486 For this loop condition, simply checking whether there's any data
1487 left at all should be sufficient. */
1488 while (info_ptr
< (dwarf2_per_objfile
->info_buffer
1489 + dwarf2_per_objfile
->info_size
))
1491 struct cleanup
*back_to_inner
;
1492 struct dwarf2_cu cu
;
1493 struct abbrev_info
*abbrev
;
1494 unsigned int bytes_read
;
1495 struct dwarf2_per_cu_data
*this_cu
;
1497 beg_of_comp_unit
= info_ptr
;
1499 memset (&cu
, 0, sizeof (cu
));
1501 obstack_init (&cu
.comp_unit_obstack
);
1503 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1505 cu
.objfile
= objfile
;
1506 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
, abfd
);
1508 /* Complete the cu_header */
1509 cu
.header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
;
1510 cu
.header
.first_die_ptr
= info_ptr
;
1511 cu
.header
.cu_head_ptr
= beg_of_comp_unit
;
1513 cu
.list_in_scope
= &file_symbols
;
1515 /* Read the abbrevs for this compilation unit into a table */
1516 dwarf2_read_abbrevs (abfd
, &cu
);
1517 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1519 this_cu
= dwarf2_find_comp_unit (cu
.header
.offset
, objfile
);
1521 /* Read the compilation unit die */
1522 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, &cu
);
1523 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1524 abfd
, info_ptr
, &cu
);
1526 if (comp_unit_die
.tag
== DW_TAG_partial_unit
)
1528 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1529 + cu
.header
.initial_length_size
);
1530 do_cleanups (back_to_inner
);
1534 /* Set the language we're debugging */
1535 set_cu_language (comp_unit_die
.language
, &cu
);
1537 /* Allocate a new partial symbol table structure */
1538 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1539 comp_unit_die
.name
? comp_unit_die
.name
: "",
1540 comp_unit_die
.lowpc
,
1541 objfile
->global_psymbols
.next
,
1542 objfile
->static_psymbols
.next
);
1544 if (comp_unit_die
.dirname
)
1545 pst
->dirname
= xstrdup (comp_unit_die
.dirname
);
1547 pst
->read_symtab_private
= (char *) this_cu
;
1549 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1551 /* Store the function that reads in the rest of the symbol table */
1552 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1554 /* If this compilation unit was already read in, free the
1555 cached copy in order to read it in again. This is
1556 necessary because we skipped some symbols when we first
1557 read in the compilation unit (see load_partial_dies).
1558 This problem could be avoided, but the benefit is
1560 if (this_cu
->cu
!= NULL
)
1561 free_one_cached_comp_unit (this_cu
->cu
);
1563 cu
.per_cu
= this_cu
;
1565 /* Note that this is a pointer to our stack frame, being
1566 added to a global data structure. It will be cleaned up
1567 in free_stack_comp_unit when we finish with this
1568 compilation unit. */
1571 this_cu
->psymtab
= pst
;
1573 /* Check if comp unit has_children.
1574 If so, read the rest of the partial symbols from this comp unit.
1575 If not, there's no more debug_info for this comp unit. */
1576 if (comp_unit_die
.has_children
)
1578 struct partial_die_info
*first_die
;
1580 lowpc
= ((CORE_ADDR
) -1);
1581 highpc
= ((CORE_ADDR
) 0);
1583 first_die
= load_partial_dies (abfd
, info_ptr
, 1, &cu
);
1585 scan_partial_symbols (first_die
, &lowpc
, &highpc
, &cu
);
1587 /* If we didn't find a lowpc, set it to highpc to avoid
1588 complaints from `maint check'. */
1589 if (lowpc
== ((CORE_ADDR
) -1))
1592 /* If the compilation unit didn't have an explicit address range,
1593 then use the information extracted from its child dies. */
1594 if (! comp_unit_die
.has_pc_info
)
1596 comp_unit_die
.lowpc
= lowpc
;
1597 comp_unit_die
.highpc
= highpc
;
1600 pst
->textlow
= comp_unit_die
.lowpc
+ baseaddr
;
1601 pst
->texthigh
= comp_unit_die
.highpc
+ baseaddr
;
1603 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1604 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1605 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1606 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1607 sort_pst_symbols (pst
);
1609 /* If there is already a psymtab or symtab for a file of this
1610 name, remove it. (If there is a symtab, more drastic things
1611 also happen.) This happens in VxWorks. */
1612 free_named_symtabs (pst
->filename
);
1614 info_ptr
= beg_of_comp_unit
+ cu
.header
.length
1615 + cu
.header
.initial_length_size
;
1617 if (comp_unit_die
.has_stmt_list
)
1619 /* Get the list of files included in the current compilation unit,
1620 and build a psymtab for each of them. */
1621 dwarf2_build_include_psymtabs (&cu
, &comp_unit_die
, pst
);
1624 do_cleanups (back_to_inner
);
1626 do_cleanups (back_to
);
1629 /* Load the DIEs for a secondary CU into memory. */
1632 load_comp_unit (struct dwarf2_per_cu_data
*this_cu
, struct objfile
*objfile
)
1634 bfd
*abfd
= objfile
->obfd
;
1635 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
1636 struct partial_die_info comp_unit_die
;
1637 struct dwarf2_cu
*cu
;
1638 struct abbrev_info
*abbrev
;
1639 unsigned int bytes_read
;
1640 struct cleanup
*back_to
;
1642 info_ptr
= dwarf2_per_objfile
->info_buffer
+ this_cu
->offset
;
1643 beg_of_comp_unit
= info_ptr
;
1645 cu
= xmalloc (sizeof (struct dwarf2_cu
));
1646 memset (cu
, 0, sizeof (struct dwarf2_cu
));
1648 obstack_init (&cu
->comp_unit_obstack
);
1650 cu
->objfile
= objfile
;
1651 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
1653 /* Complete the cu_header. */
1654 cu
->header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
;
1655 cu
->header
.first_die_ptr
= info_ptr
;
1656 cu
->header
.cu_head_ptr
= beg_of_comp_unit
;
1658 /* Read the abbrevs for this compilation unit into a table. */
1659 dwarf2_read_abbrevs (abfd
, cu
);
1660 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
1662 /* Read the compilation unit die. */
1663 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
1664 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1665 abfd
, info_ptr
, cu
);
1667 /* Set the language we're debugging. */
1668 set_cu_language (comp_unit_die
.language
, cu
);
1670 /* Link this compilation unit into the compilation unit tree. */
1672 cu
->per_cu
= this_cu
;
1674 /* Check if comp unit has_children.
1675 If so, read the rest of the partial symbols from this comp unit.
1676 If not, there's no more debug_info for this comp unit. */
1677 if (comp_unit_die
.has_children
)
1678 load_partial_dies (abfd
, info_ptr
, 0, cu
);
1680 do_cleanups (back_to
);
1683 /* Create a list of all compilation units in OBJFILE. We do this only
1684 if an inter-comp-unit reference is found; presumably if there is one,
1685 there will be many, and one will occur early in the .debug_info section.
1686 So there's no point in building this list incrementally. */
1689 create_all_comp_units (struct objfile
*objfile
)
1693 struct dwarf2_per_cu_data
**all_comp_units
;
1694 gdb_byte
*info_ptr
= dwarf2_per_objfile
->info_buffer
;
1698 all_comp_units
= xmalloc (n_allocated
1699 * sizeof (struct dwarf2_per_cu_data
*));
1701 while (info_ptr
< dwarf2_per_objfile
->info_buffer
+ dwarf2_per_objfile
->info_size
)
1703 struct comp_unit_head cu_header
;
1704 gdb_byte
*beg_of_comp_unit
;
1705 struct dwarf2_per_cu_data
*this_cu
;
1706 unsigned long offset
;
1707 unsigned int bytes_read
;
1709 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
1711 /* Read just enough information to find out where the next
1712 compilation unit is. */
1713 cu_header
.initial_length_size
= 0;
1714 cu_header
.length
= read_initial_length (objfile
->obfd
, info_ptr
,
1715 &cu_header
, &bytes_read
);
1717 /* Save the compilation unit for later lookup. */
1718 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
1719 sizeof (struct dwarf2_per_cu_data
));
1720 memset (this_cu
, 0, sizeof (*this_cu
));
1721 this_cu
->offset
= offset
;
1722 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
1724 if (n_comp_units
== n_allocated
)
1727 all_comp_units
= xrealloc (all_comp_units
,
1729 * sizeof (struct dwarf2_per_cu_data
*));
1731 all_comp_units
[n_comp_units
++] = this_cu
;
1733 info_ptr
= info_ptr
+ this_cu
->length
;
1736 dwarf2_per_objfile
->all_comp_units
1737 = obstack_alloc (&objfile
->objfile_obstack
,
1738 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1739 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
1740 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1741 xfree (all_comp_units
);
1742 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
1745 /* Process all loaded DIEs for compilation unit CU, starting at FIRST_DIE.
1746 Also set *LOWPC and *HIGHPC to the lowest and highest PC values found
1750 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
1751 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
1753 struct objfile
*objfile
= cu
->objfile
;
1754 bfd
*abfd
= objfile
->obfd
;
1755 struct partial_die_info
*pdi
;
1757 /* Now, march along the PDI's, descending into ones which have
1758 interesting children but skipping the children of the other ones,
1759 until we reach the end of the compilation unit. */
1765 fixup_partial_die (pdi
, cu
);
1767 /* Anonymous namespaces have no name but have interesting
1768 children, so we need to look at them. Ditto for anonymous
1771 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
1772 || pdi
->tag
== DW_TAG_enumeration_type
)
1776 case DW_TAG_subprogram
:
1777 if (pdi
->has_pc_info
)
1779 if (pdi
->lowpc
< *lowpc
)
1781 *lowpc
= pdi
->lowpc
;
1783 if (pdi
->highpc
> *highpc
)
1785 *highpc
= pdi
->highpc
;
1787 if (!pdi
->is_declaration
)
1789 add_partial_symbol (pdi
, cu
);
1793 case DW_TAG_variable
:
1794 case DW_TAG_typedef
:
1795 case DW_TAG_union_type
:
1796 if (!pdi
->is_declaration
)
1798 add_partial_symbol (pdi
, cu
);
1801 case DW_TAG_class_type
:
1802 case DW_TAG_interface_type
:
1803 case DW_TAG_structure_type
:
1804 if (!pdi
->is_declaration
)
1806 add_partial_symbol (pdi
, cu
);
1809 case DW_TAG_enumeration_type
:
1810 if (!pdi
->is_declaration
)
1811 add_partial_enumeration (pdi
, cu
);
1813 case DW_TAG_base_type
:
1814 case DW_TAG_subrange_type
:
1815 /* File scope base type definitions are added to the partial
1817 add_partial_symbol (pdi
, cu
);
1819 case DW_TAG_namespace
:
1820 add_partial_namespace (pdi
, lowpc
, highpc
, cu
);
1827 /* If the die has a sibling, skip to the sibling. */
1829 pdi
= pdi
->die_sibling
;
1833 /* Functions used to compute the fully scoped name of a partial DIE.
1835 Normally, this is simple. For C++, the parent DIE's fully scoped
1836 name is concatenated with "::" and the partial DIE's name. For
1837 Java, the same thing occurs except that "." is used instead of "::".
1838 Enumerators are an exception; they use the scope of their parent
1839 enumeration type, i.e. the name of the enumeration type is not
1840 prepended to the enumerator.
1842 There are two complexities. One is DW_AT_specification; in this
1843 case "parent" means the parent of the target of the specification,
1844 instead of the direct parent of the DIE. The other is compilers
1845 which do not emit DW_TAG_namespace; in this case we try to guess
1846 the fully qualified name of structure types from their members'
1847 linkage names. This must be done using the DIE's children rather
1848 than the children of any DW_AT_specification target. We only need
1849 to do this for structures at the top level, i.e. if the target of
1850 any DW_AT_specification (if any; otherwise the DIE itself) does not
1853 /* Compute the scope prefix associated with PDI's parent, in
1854 compilation unit CU. The result will be allocated on CU's
1855 comp_unit_obstack, or a copy of the already allocated PDI->NAME
1856 field. NULL is returned if no prefix is necessary. */
1858 partial_die_parent_scope (struct partial_die_info
*pdi
,
1859 struct dwarf2_cu
*cu
)
1861 char *grandparent_scope
;
1862 struct partial_die_info
*parent
, *real_pdi
;
1864 /* We need to look at our parent DIE; if we have a DW_AT_specification,
1865 then this means the parent of the specification DIE. */
1868 while (real_pdi
->has_specification
)
1869 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
1871 parent
= real_pdi
->die_parent
;
1875 if (parent
->scope_set
)
1876 return parent
->scope
;
1878 fixup_partial_die (parent
, cu
);
1880 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
1882 if (parent
->tag
== DW_TAG_namespace
1883 || parent
->tag
== DW_TAG_structure_type
1884 || parent
->tag
== DW_TAG_class_type
1885 || parent
->tag
== DW_TAG_interface_type
1886 || parent
->tag
== DW_TAG_union_type
)
1888 if (grandparent_scope
== NULL
)
1889 parent
->scope
= parent
->name
;
1891 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
1894 else if (parent
->tag
== DW_TAG_enumeration_type
)
1895 /* Enumerators should not get the name of the enumeration as a prefix. */
1896 parent
->scope
= grandparent_scope
;
1899 /* FIXME drow/2004-04-01: What should we be doing with
1900 function-local names? For partial symbols, we should probably be
1902 complaint (&symfile_complaints
,
1903 _("unhandled containing DIE tag %d for DIE at %d"),
1904 parent
->tag
, pdi
->offset
);
1905 parent
->scope
= grandparent_scope
;
1908 parent
->scope_set
= 1;
1909 return parent
->scope
;
1912 /* Return the fully scoped name associated with PDI, from compilation unit
1913 CU. The result will be allocated with malloc. */
1915 partial_die_full_name (struct partial_die_info
*pdi
,
1916 struct dwarf2_cu
*cu
)
1920 parent_scope
= partial_die_parent_scope (pdi
, cu
);
1921 if (parent_scope
== NULL
)
1924 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
1928 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
1930 struct objfile
*objfile
= cu
->objfile
;
1932 char *actual_name
= NULL
;
1933 const char *my_prefix
;
1934 const struct partial_symbol
*psym
= NULL
;
1936 int built_actual_name
= 0;
1938 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1940 if (pdi_needs_namespace (pdi
->tag
))
1942 actual_name
= partial_die_full_name (pdi
, cu
);
1944 built_actual_name
= 1;
1947 if (actual_name
== NULL
)
1948 actual_name
= pdi
->name
;
1952 case DW_TAG_subprogram
:
1953 if (pdi
->is_external
|| cu
->language
== language_ada
)
1955 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
1956 of the global scope. But in Ada, we want to be able to access
1957 nested procedures globally. So all Ada subprograms are stored
1958 in the global scope. */
1959 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1960 mst_text, objfile); */
1961 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1962 VAR_DOMAIN
, LOC_BLOCK
,
1963 &objfile
->global_psymbols
,
1964 0, pdi
->lowpc
+ baseaddr
,
1965 cu
->language
, objfile
);
1969 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1970 mst_file_text, objfile); */
1971 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1972 VAR_DOMAIN
, LOC_BLOCK
,
1973 &objfile
->static_psymbols
,
1974 0, pdi
->lowpc
+ baseaddr
,
1975 cu
->language
, objfile
);
1978 case DW_TAG_variable
:
1979 if (pdi
->is_external
)
1982 Don't enter into the minimal symbol tables as there is
1983 a minimal symbol table entry from the ELF symbols already.
1984 Enter into partial symbol table if it has a location
1985 descriptor or a type.
1986 If the location descriptor is missing, new_symbol will create
1987 a LOC_UNRESOLVED symbol, the address of the variable will then
1988 be determined from the minimal symbol table whenever the variable
1990 The address for the partial symbol table entry is not
1991 used by GDB, but it comes in handy for debugging partial symbol
1995 addr
= decode_locdesc (pdi
->locdesc
, cu
);
1996 if (pdi
->locdesc
|| pdi
->has_type
)
1997 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1998 VAR_DOMAIN
, LOC_STATIC
,
1999 &objfile
->global_psymbols
,
2001 cu
->language
, objfile
);
2005 /* Static Variable. Skip symbols without location descriptors. */
2006 if (pdi
->locdesc
== NULL
)
2008 if (built_actual_name
)
2009 xfree (actual_name
);
2012 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2013 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2014 mst_file_data, objfile); */
2015 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2016 VAR_DOMAIN
, LOC_STATIC
,
2017 &objfile
->static_psymbols
,
2019 cu
->language
, objfile
);
2022 case DW_TAG_typedef
:
2023 case DW_TAG_base_type
:
2024 case DW_TAG_subrange_type
:
2025 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2026 VAR_DOMAIN
, LOC_TYPEDEF
,
2027 &objfile
->static_psymbols
,
2028 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2030 case DW_TAG_namespace
:
2031 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2032 VAR_DOMAIN
, LOC_TYPEDEF
,
2033 &objfile
->global_psymbols
,
2034 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2036 case DW_TAG_class_type
:
2037 case DW_TAG_interface_type
:
2038 case DW_TAG_structure_type
:
2039 case DW_TAG_union_type
:
2040 case DW_TAG_enumeration_type
:
2041 /* Skip external references. The DWARF standard says in the section
2042 about "Structure, Union, and Class Type Entries": "An incomplete
2043 structure, union or class type is represented by a structure,
2044 union or class entry that does not have a byte size attribute
2045 and that has a DW_AT_declaration attribute." */
2046 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2048 if (built_actual_name
)
2049 xfree (actual_name
);
2053 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2054 static vs. global. */
2055 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2056 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2057 (cu
->language
== language_cplus
2058 || cu
->language
== language_java
)
2059 ? &objfile
->global_psymbols
2060 : &objfile
->static_psymbols
,
2061 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2063 if (cu
->language
== language_cplus
2064 || cu
->language
== language_java
2065 || cu
->language
== language_ada
)
2067 /* For C++ and Java, these implicitly act as typedefs as well. */
2068 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2069 VAR_DOMAIN
, LOC_TYPEDEF
,
2070 &objfile
->global_psymbols
,
2071 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2074 case DW_TAG_enumerator
:
2075 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2076 VAR_DOMAIN
, LOC_CONST
,
2077 (cu
->language
== language_cplus
2078 || cu
->language
== language_java
)
2079 ? &objfile
->global_psymbols
2080 : &objfile
->static_psymbols
,
2081 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2087 /* Check to see if we should scan the name for possible namespace
2088 info. Only do this if this is C++, if we don't have namespace
2089 debugging info in the file, if the psym is of an appropriate type
2090 (otherwise we'll have psym == NULL), and if we actually had a
2091 mangled name to begin with. */
2093 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2094 cases which do not set PSYM above? */
2096 if (cu
->language
== language_cplus
2097 && cu
->has_namespace_info
== 0
2099 && SYMBOL_CPLUS_DEMANGLED_NAME (psym
) != NULL
)
2100 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym
),
2103 if (built_actual_name
)
2104 xfree (actual_name
);
2107 /* Determine whether a die of type TAG living in a C++ class or
2108 namespace needs to have the name of the scope prepended to the
2109 name listed in the die. */
2112 pdi_needs_namespace (enum dwarf_tag tag
)
2116 case DW_TAG_namespace
:
2117 case DW_TAG_typedef
:
2118 case DW_TAG_class_type
:
2119 case DW_TAG_interface_type
:
2120 case DW_TAG_structure_type
:
2121 case DW_TAG_union_type
:
2122 case DW_TAG_enumeration_type
:
2123 case DW_TAG_enumerator
:
2130 /* Read a partial die corresponding to a namespace; also, add a symbol
2131 corresponding to that namespace to the symbol table. NAMESPACE is
2132 the name of the enclosing namespace. */
2135 add_partial_namespace (struct partial_die_info
*pdi
,
2136 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2137 struct dwarf2_cu
*cu
)
2139 struct objfile
*objfile
= cu
->objfile
;
2141 /* Add a symbol for the namespace. */
2143 add_partial_symbol (pdi
, cu
);
2145 /* Now scan partial symbols in that namespace. */
2147 if (pdi
->has_children
)
2148 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, cu
);
2151 /* See if we can figure out if the class lives in a namespace. We do
2152 this by looking for a member function; its demangled name will
2153 contain namespace info, if there is any. */
2156 guess_structure_name (struct partial_die_info
*struct_pdi
,
2157 struct dwarf2_cu
*cu
)
2159 if ((cu
->language
== language_cplus
2160 || cu
->language
== language_java
)
2161 && cu
->has_namespace_info
== 0
2162 && struct_pdi
->has_children
)
2164 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2165 what template types look like, because the demangler
2166 frequently doesn't give the same name as the debug info. We
2167 could fix this by only using the demangled name to get the
2168 prefix (but see comment in read_structure_type). */
2170 struct partial_die_info
*child_pdi
= struct_pdi
->die_child
;
2171 struct partial_die_info
*real_pdi
;
2173 /* If this DIE (this DIE's specification, if any) has a parent, then
2174 we should not do this. We'll prepend the parent's fully qualified
2175 name when we create the partial symbol. */
2177 real_pdi
= struct_pdi
;
2178 while (real_pdi
->has_specification
)
2179 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2181 if (real_pdi
->die_parent
!= NULL
)
2184 while (child_pdi
!= NULL
)
2186 if (child_pdi
->tag
== DW_TAG_subprogram
)
2188 char *actual_class_name
2189 = language_class_name_from_physname (cu
->language_defn
,
2191 if (actual_class_name
!= NULL
)
2194 = obsavestring (actual_class_name
,
2195 strlen (actual_class_name
),
2196 &cu
->comp_unit_obstack
);
2197 xfree (actual_class_name
);
2202 child_pdi
= child_pdi
->die_sibling
;
2207 /* Read a partial die corresponding to an enumeration type. */
2210 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2211 struct dwarf2_cu
*cu
)
2213 struct objfile
*objfile
= cu
->objfile
;
2214 bfd
*abfd
= objfile
->obfd
;
2215 struct partial_die_info
*pdi
;
2217 if (enum_pdi
->name
!= NULL
)
2218 add_partial_symbol (enum_pdi
, cu
);
2220 pdi
= enum_pdi
->die_child
;
2223 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2224 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2226 add_partial_symbol (pdi
, cu
);
2227 pdi
= pdi
->die_sibling
;
2231 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2232 Return the corresponding abbrev, or NULL if the number is zero (indicating
2233 an empty DIE). In either case *BYTES_READ will be set to the length of
2234 the initial number. */
2236 static struct abbrev_info
*
2237 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2238 struct dwarf2_cu
*cu
)
2240 bfd
*abfd
= cu
->objfile
->obfd
;
2241 unsigned int abbrev_number
;
2242 struct abbrev_info
*abbrev
;
2244 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2246 if (abbrev_number
== 0)
2249 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2252 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2253 bfd_get_filename (abfd
));
2259 /* Scan the debug information for CU starting at INFO_PTR. Returns a
2260 pointer to the end of a series of DIEs, terminated by an empty
2261 DIE. Any children of the skipped DIEs will also be skipped. */
2264 skip_children (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2266 struct abbrev_info
*abbrev
;
2267 unsigned int bytes_read
;
2271 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2273 return info_ptr
+ bytes_read
;
2275 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
2279 /* Scan the debug information for CU starting at INFO_PTR. INFO_PTR
2280 should point just after the initial uleb128 of a DIE, and the
2281 abbrev corresponding to that skipped uleb128 should be passed in
2282 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2286 skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
2287 struct dwarf2_cu
*cu
)
2289 unsigned int bytes_read
;
2290 struct attribute attr
;
2291 bfd
*abfd
= cu
->objfile
->obfd
;
2292 unsigned int form
, i
;
2294 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2296 /* The only abbrev we care about is DW_AT_sibling. */
2297 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2299 read_attribute (&attr
, &abbrev
->attrs
[i
],
2300 abfd
, info_ptr
, cu
);
2301 if (attr
.form
== DW_FORM_ref_addr
)
2302 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2304 return dwarf2_per_objfile
->info_buffer
2305 + dwarf2_get_ref_die_offset (&attr
, cu
);
2308 /* If it isn't DW_AT_sibling, skip this attribute. */
2309 form
= abbrev
->attrs
[i
].form
;
2314 case DW_FORM_ref_addr
:
2315 info_ptr
+= cu
->header
.addr_size
;
2334 case DW_FORM_string
:
2335 read_string (abfd
, info_ptr
, &bytes_read
);
2336 info_ptr
+= bytes_read
;
2339 info_ptr
+= cu
->header
.offset_size
;
2342 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2343 info_ptr
+= bytes_read
;
2345 case DW_FORM_block1
:
2346 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2348 case DW_FORM_block2
:
2349 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2351 case DW_FORM_block4
:
2352 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2356 case DW_FORM_ref_udata
:
2357 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2359 case DW_FORM_indirect
:
2360 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2361 info_ptr
+= bytes_read
;
2362 /* We need to continue parsing from here, so just go back to
2364 goto skip_attribute
;
2367 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2368 dwarf_form_name (form
),
2369 bfd_get_filename (abfd
));
2373 if (abbrev
->has_children
)
2374 return skip_children (info_ptr
, cu
);
2379 /* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of
2380 the next DIE after ORIG_PDI. */
2383 locate_pdi_sibling (struct partial_die_info
*orig_pdi
, gdb_byte
*info_ptr
,
2384 bfd
*abfd
, struct dwarf2_cu
*cu
)
2386 /* Do we know the sibling already? */
2388 if (orig_pdi
->sibling
)
2389 return orig_pdi
->sibling
;
2391 /* Are there any children to deal with? */
2393 if (!orig_pdi
->has_children
)
2396 /* Skip the children the long way. */
2398 return skip_children (info_ptr
, cu
);
2401 /* Expand this partial symbol table into a full symbol table. */
2404 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2406 /* FIXME: This is barely more than a stub. */
2411 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2417 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2418 gdb_flush (gdb_stdout
);
2421 /* Restore our global data. */
2422 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2423 dwarf2_objfile_data_key
);
2425 psymtab_to_symtab_1 (pst
);
2427 /* Finish up the debug error message. */
2429 printf_filtered (_("done.\n"));
2434 /* Add PER_CU to the queue. */
2437 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2439 struct dwarf2_queue_item
*item
;
2442 item
= xmalloc (sizeof (*item
));
2443 item
->per_cu
= per_cu
;
2446 if (dwarf2_queue
== NULL
)
2447 dwarf2_queue
= item
;
2449 dwarf2_queue_tail
->next
= item
;
2451 dwarf2_queue_tail
= item
;
2454 /* Process the queue. */
2457 process_queue (struct objfile
*objfile
)
2459 struct dwarf2_queue_item
*item
, *next_item
;
2461 /* Initially, there is just one item on the queue. Load its DIEs,
2462 and the DIEs of any other compilation units it requires,
2465 for (item
= dwarf2_queue
; item
!= NULL
; item
= item
->next
)
2467 /* Read in this compilation unit. This may add new items to
2468 the end of the queue. */
2469 load_full_comp_unit (item
->per_cu
, objfile
);
2471 item
->per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
2472 dwarf2_per_objfile
->read_in_chain
= item
->per_cu
;
2474 /* If this compilation unit has already had full symbols created,
2475 reset the TYPE fields in each DIE. */
2476 if (item
->per_cu
->type_hash
)
2477 reset_die_and_siblings_types (item
->per_cu
->cu
->dies
,
2481 /* Now everything left on the queue needs to be read in. Process
2482 them, one at a time, removing from the queue as we finish. */
2483 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
2485 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
2486 process_full_comp_unit (item
->per_cu
);
2488 item
->per_cu
->queued
= 0;
2489 next_item
= item
->next
;
2493 dwarf2_queue_tail
= NULL
;
2496 /* Free all allocated queue entries. This function only releases anything if
2497 an error was thrown; if the queue was processed then it would have been
2498 freed as we went along. */
2501 dwarf2_release_queue (void *dummy
)
2503 struct dwarf2_queue_item
*item
, *last
;
2505 item
= dwarf2_queue
;
2508 /* Anything still marked queued is likely to be in an
2509 inconsistent state, so discard it. */
2510 if (item
->per_cu
->queued
)
2512 if (item
->per_cu
->cu
!= NULL
)
2513 free_one_cached_comp_unit (item
->per_cu
->cu
);
2514 item
->per_cu
->queued
= 0;
2522 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
2525 /* Read in full symbols for PST, and anything it depends on. */
2528 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2530 struct dwarf2_per_cu_data
*per_cu
;
2531 struct cleanup
*back_to
;
2534 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2535 if (!pst
->dependencies
[i
]->readin
)
2537 /* Inform about additional files that need to be read in. */
2540 /* FIXME: i18n: Need to make this a single string. */
2541 fputs_filtered (" ", gdb_stdout
);
2543 fputs_filtered ("and ", gdb_stdout
);
2545 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2546 wrap_here (""); /* Flush output */
2547 gdb_flush (gdb_stdout
);
2549 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2552 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
2556 /* It's an include file, no symbols to read for it.
2557 Everything is in the parent symtab. */
2562 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2564 queue_comp_unit (per_cu
);
2566 process_queue (pst
->objfile
);
2568 /* Age the cache, releasing compilation units that have not
2569 been used recently. */
2570 age_cached_comp_units ();
2572 do_cleanups (back_to
);
2575 /* Load the DIEs associated with PST and PER_CU into memory. */
2577 static struct dwarf2_cu
*
2578 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2580 bfd
*abfd
= objfile
->obfd
;
2581 struct dwarf2_cu
*cu
;
2582 unsigned long offset
;
2584 struct cleanup
*back_to
, *free_cu_cleanup
;
2585 struct attribute
*attr
;
2588 /* Set local variables from the partial symbol table info. */
2589 offset
= per_cu
->offset
;
2591 info_ptr
= dwarf2_per_objfile
->info_buffer
+ offset
;
2593 cu
= xmalloc (sizeof (struct dwarf2_cu
));
2594 memset (cu
, 0, sizeof (struct dwarf2_cu
));
2596 /* If an error occurs while loading, release our storage. */
2597 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
2599 cu
->objfile
= objfile
;
2601 /* read in the comp_unit header */
2602 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
2604 /* Read the abbrevs for this compilation unit */
2605 dwarf2_read_abbrevs (abfd
, cu
);
2606 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2608 cu
->header
.offset
= offset
;
2610 cu
->per_cu
= per_cu
;
2613 /* We use this obstack for block values in dwarf_alloc_block. */
2614 obstack_init (&cu
->comp_unit_obstack
);
2616 cu
->dies
= read_comp_unit (info_ptr
, abfd
, cu
);
2618 /* We try not to read any attributes in this function, because not
2619 all objfiles needed for references have been loaded yet, and symbol
2620 table processing isn't initialized. But we have to set the CU language,
2621 or we won't be able to build types correctly. */
2622 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
2624 set_cu_language (DW_UNSND (attr
), cu
);
2626 set_cu_language (language_minimal
, cu
);
2628 do_cleanups (back_to
);
2630 /* We've successfully allocated this compilation unit. Let our caller
2631 clean it up when finished with it. */
2632 discard_cleanups (free_cu_cleanup
);
2637 /* Generate full symbol information for PST and CU, whose DIEs have
2638 already been loaded into memory. */
2641 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2643 struct partial_symtab
*pst
= per_cu
->psymtab
;
2644 struct dwarf2_cu
*cu
= per_cu
->cu
;
2645 struct objfile
*objfile
= pst
->objfile
;
2646 bfd
*abfd
= objfile
->obfd
;
2647 CORE_ADDR lowpc
, highpc
;
2648 struct symtab
*symtab
;
2649 struct cleanup
*back_to
;
2650 struct attribute
*attr
;
2653 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2655 /* We're in the global namespace. */
2656 processing_current_prefix
= "";
2659 back_to
= make_cleanup (really_free_pendings
, NULL
);
2661 cu
->list_in_scope
= &file_symbols
;
2663 /* Find the base address of the compilation unit for range lists and
2664 location lists. It will normally be specified by DW_AT_low_pc.
2665 In DWARF-3 draft 4, the base address could be overridden by
2666 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2667 compilation units with discontinuous ranges. */
2669 cu
->header
.base_known
= 0;
2670 cu
->header
.base_address
= 0;
2672 attr
= dwarf2_attr (cu
->dies
, DW_AT_entry_pc
, cu
);
2675 cu
->header
.base_address
= DW_ADDR (attr
);
2676 cu
->header
.base_known
= 1;
2680 attr
= dwarf2_attr (cu
->dies
, DW_AT_low_pc
, cu
);
2683 cu
->header
.base_address
= DW_ADDR (attr
);
2684 cu
->header
.base_known
= 1;
2688 /* Do line number decoding in read_file_scope () */
2689 process_die (cu
->dies
, cu
);
2691 /* Some compilers don't define a DW_AT_high_pc attribute for the
2692 compilation unit. If the DW_AT_high_pc is missing, synthesize
2693 it, by scanning the DIE's below the compilation unit. */
2694 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
2696 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
2698 /* Set symtab language to language from DW_AT_language.
2699 If the compilation is from a C file generated by language preprocessors,
2700 do not set the language if it was already deduced by start_subfile. */
2702 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
2704 symtab
->language
= cu
->language
;
2706 pst
->symtab
= symtab
;
2709 do_cleanups (back_to
);
2712 /* Process a die and its children. */
2715 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
2719 case DW_TAG_padding
:
2721 case DW_TAG_compile_unit
:
2722 read_file_scope (die
, cu
);
2724 case DW_TAG_subprogram
:
2725 read_subroutine_type (die
, cu
);
2726 read_func_scope (die
, cu
);
2728 case DW_TAG_inlined_subroutine
:
2729 /* FIXME: These are ignored for now.
2730 They could be used to set breakpoints on all inlined instances
2731 of a function and make GDB `next' properly over inlined functions. */
2733 case DW_TAG_lexical_block
:
2734 case DW_TAG_try_block
:
2735 case DW_TAG_catch_block
:
2736 read_lexical_block_scope (die
, cu
);
2738 case DW_TAG_class_type
:
2739 case DW_TAG_interface_type
:
2740 case DW_TAG_structure_type
:
2741 case DW_TAG_union_type
:
2742 read_structure_type (die
, cu
);
2743 process_structure_scope (die
, cu
);
2745 case DW_TAG_enumeration_type
:
2746 read_enumeration_type (die
, cu
);
2747 process_enumeration_scope (die
, cu
);
2750 /* FIXME drow/2004-03-14: These initialize die->type, but do not create
2751 a symbol or process any children. Therefore it doesn't do anything
2752 that won't be done on-demand by read_type_die. */
2753 case DW_TAG_subroutine_type
:
2754 read_subroutine_type (die
, cu
);
2756 case DW_TAG_set_type
:
2757 read_set_type (die
, cu
);
2759 case DW_TAG_array_type
:
2760 read_array_type (die
, cu
);
2762 case DW_TAG_pointer_type
:
2763 read_tag_pointer_type (die
, cu
);
2765 case DW_TAG_ptr_to_member_type
:
2766 read_tag_ptr_to_member_type (die
, cu
);
2768 case DW_TAG_reference_type
:
2769 read_tag_reference_type (die
, cu
);
2771 case DW_TAG_string_type
:
2772 read_tag_string_type (die
, cu
);
2776 case DW_TAG_base_type
:
2777 read_base_type (die
, cu
);
2778 /* Add a typedef symbol for the type definition, if it has a
2780 new_symbol (die
, die
->type
, cu
);
2782 case DW_TAG_subrange_type
:
2783 read_subrange_type (die
, cu
);
2784 /* Add a typedef symbol for the type definition, if it has a
2786 new_symbol (die
, die
->type
, cu
);
2788 case DW_TAG_common_block
:
2789 read_common_block (die
, cu
);
2791 case DW_TAG_common_inclusion
:
2793 case DW_TAG_namespace
:
2794 processing_has_namespace_info
= 1;
2795 read_namespace (die
, cu
);
2797 case DW_TAG_imported_declaration
:
2798 case DW_TAG_imported_module
:
2799 /* FIXME: carlton/2002-10-16: Eventually, we should use the
2800 information contained in these. DW_TAG_imported_declaration
2801 dies shouldn't have children; DW_TAG_imported_module dies
2802 shouldn't in the C++ case, but conceivably could in the
2803 Fortran case, so we'll have to replace this gdb_assert if
2804 Fortran compilers start generating that info. */
2805 processing_has_namespace_info
= 1;
2806 gdb_assert (die
->child
== NULL
);
2809 new_symbol (die
, NULL
, cu
);
2815 initialize_cu_func_list (struct dwarf2_cu
*cu
)
2817 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
2821 free_cu_line_header (void *arg
)
2823 struct dwarf2_cu
*cu
= arg
;
2825 free_line_header (cu
->line_header
);
2826 cu
->line_header
= NULL
;
2830 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
2832 struct objfile
*objfile
= cu
->objfile
;
2833 struct comp_unit_head
*cu_header
= &cu
->header
;
2834 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2835 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
2836 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
2837 struct attribute
*attr
;
2839 char *comp_dir
= NULL
;
2840 struct die_info
*child_die
;
2841 bfd
*abfd
= objfile
->obfd
;
2842 struct line_header
*line_header
= 0;
2845 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2847 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
2849 /* If we didn't find a lowpc, set it to highpc to avoid complaints
2850 from finish_block. */
2851 if (lowpc
== ((CORE_ADDR
) -1))
2856 /* Find the filename. Do not use dwarf2_name here, since the filename
2857 is not a source language identifier. */
2858 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
2861 name
= DW_STRING (attr
);
2864 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
2866 comp_dir
= DW_STRING (attr
);
2867 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
2869 comp_dir
= ldirname (name
);
2870 if (comp_dir
!= NULL
)
2871 make_cleanup (xfree
, comp_dir
);
2873 if (comp_dir
!= NULL
)
2875 /* Irix 6.2 native cc prepends <machine>.: to the compilation
2876 directory, get rid of it. */
2877 char *cp
= strchr (comp_dir
, ':');
2879 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
2886 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
2889 set_cu_language (DW_UNSND (attr
), cu
);
2892 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
2894 cu
->producer
= DW_STRING (attr
);
2896 /* We assume that we're processing GCC output. */
2897 processing_gcc_compilation
= 2;
2899 start_symtab (name
, comp_dir
, lowpc
);
2900 record_debugformat ("DWARF 2");
2901 record_producer (cu
->producer
);
2903 initialize_cu_func_list (cu
);
2905 /* Decode line number information if present. We do this before
2906 processing child DIEs, so that the line header table is available
2907 for DW_AT_decl_file. */
2908 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2911 unsigned int line_offset
= DW_UNSND (attr
);
2912 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2915 cu
->line_header
= line_header
;
2916 make_cleanup (free_cu_line_header
, cu
);
2917 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
2921 /* Process all dies in compilation unit. */
2922 if (die
->child
!= NULL
)
2924 child_die
= die
->child
;
2925 while (child_die
&& child_die
->tag
)
2927 process_die (child_die
, cu
);
2928 child_die
= sibling_die (child_die
);
2932 /* Decode macro information, if present. Dwarf 2 macro information
2933 refers to information in the line number info statement program
2934 header, so we can only read it if we've read the header
2936 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
2937 if (attr
&& line_header
)
2939 unsigned int macro_offset
= DW_UNSND (attr
);
2940 dwarf_decode_macros (line_header
, macro_offset
,
2941 comp_dir
, abfd
, cu
);
2943 do_cleanups (back_to
);
2947 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
2948 struct dwarf2_cu
*cu
)
2950 struct function_range
*thisfn
;
2952 thisfn
= (struct function_range
*)
2953 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
2954 thisfn
->name
= name
;
2955 thisfn
->lowpc
= lowpc
;
2956 thisfn
->highpc
= highpc
;
2957 thisfn
->seen_line
= 0;
2958 thisfn
->next
= NULL
;
2960 if (cu
->last_fn
== NULL
)
2961 cu
->first_fn
= thisfn
;
2963 cu
->last_fn
->next
= thisfn
;
2965 cu
->last_fn
= thisfn
;
2969 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
2971 struct objfile
*objfile
= cu
->objfile
;
2972 struct context_stack
*new;
2975 struct die_info
*child_die
;
2976 struct attribute
*attr
;
2978 const char *previous_prefix
= processing_current_prefix
;
2979 struct cleanup
*back_to
= NULL
;
2981 struct block
*block
;
2983 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2985 name
= dwarf2_linkage_name (die
, cu
);
2987 /* Ignore functions with missing or empty names and functions with
2988 missing or invalid low and high pc attributes. */
2989 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
2992 if (cu
->language
== language_cplus
2993 || cu
->language
== language_java
)
2995 struct die_info
*spec_die
= die_specification (die
, cu
);
2997 /* NOTE: carlton/2004-01-23: We have to be careful in the
2998 presence of DW_AT_specification. For example, with GCC 3.4,
3003 // Definition of N::foo.
3007 then we'll have a tree of DIEs like this:
3009 1: DW_TAG_compile_unit
3010 2: DW_TAG_namespace // N
3011 3: DW_TAG_subprogram // declaration of N::foo
3012 4: DW_TAG_subprogram // definition of N::foo
3013 DW_AT_specification // refers to die #3
3015 Thus, when processing die #4, we have to pretend that we're
3016 in the context of its DW_AT_specification, namely the contex
3019 if (spec_die
!= NULL
)
3021 char *specification_prefix
= determine_prefix (spec_die
, cu
);
3022 processing_current_prefix
= specification_prefix
;
3023 back_to
= make_cleanup (xfree
, specification_prefix
);
3030 /* Record the function range for dwarf_decode_lines. */
3031 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3033 new = push_context (0, lowpc
);
3034 new->name
= new_symbol (die
, die
->type
, cu
);
3036 /* If there is a location expression for DW_AT_frame_base, record
3038 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3040 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3041 expression is being recorded directly in the function's symbol
3042 and not in a separate frame-base object. I guess this hack is
3043 to avoid adding some sort of frame-base adjunct/annex to the
3044 function's symbol :-(. The problem with doing this is that it
3045 results in a function symbol with a location expression that
3046 has nothing to do with the location of the function, ouch! The
3047 relationship should be: a function's symbol has-a frame base; a
3048 frame-base has-a location expression. */
3049 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3051 cu
->list_in_scope
= &local_symbols
;
3053 if (die
->child
!= NULL
)
3055 child_die
= die
->child
;
3056 while (child_die
&& child_die
->tag
)
3058 process_die (child_die
, cu
);
3059 child_die
= sibling_die (child_die
);
3063 new = pop_context ();
3064 /* Make a block for the local symbols within. */
3065 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3066 lowpc
, highpc
, objfile
);
3068 /* If we have address ranges, record them. */
3069 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3071 /* In C++, we can have functions nested inside functions (e.g., when
3072 a function declares a class that has methods). This means that
3073 when we finish processing a function scope, we may need to go
3074 back to building a containing block's symbol lists. */
3075 local_symbols
= new->locals
;
3076 param_symbols
= new->params
;
3078 /* If we've finished processing a top-level function, subsequent
3079 symbols go in the file symbol list. */
3080 if (outermost_context_p ())
3081 cu
->list_in_scope
= &file_symbols
;
3083 processing_current_prefix
= previous_prefix
;
3084 if (back_to
!= NULL
)
3085 do_cleanups (back_to
);
3088 /* Process all the DIES contained within a lexical block scope. Start
3089 a new scope, process the dies, and then close the scope. */
3092 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3094 struct objfile
*objfile
= cu
->objfile
;
3095 struct context_stack
*new;
3096 CORE_ADDR lowpc
, highpc
;
3097 struct die_info
*child_die
;
3100 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3102 /* Ignore blocks with missing or invalid low and high pc attributes. */
3103 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3104 as multiple lexical blocks? Handling children in a sane way would
3105 be nasty. Might be easier to properly extend generic blocks to
3107 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
3112 push_context (0, lowpc
);
3113 if (die
->child
!= NULL
)
3115 child_die
= die
->child
;
3116 while (child_die
&& child_die
->tag
)
3118 process_die (child_die
, cu
);
3119 child_die
= sibling_die (child_die
);
3122 new = pop_context ();
3124 if (local_symbols
!= NULL
)
3127 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3130 /* Note that recording ranges after traversing children, as we
3131 do here, means that recording a parent's ranges entails
3132 walking across all its children's ranges as they appear in
3133 the address map, which is quadratic behavior.
3135 It would be nicer to record the parent's ranges before
3136 traversing its children, simply overriding whatever you find
3137 there. But since we don't even decide whether to create a
3138 block until after we've traversed its children, that's hard
3140 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3142 local_symbols
= new->locals
;
3145 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3146 Return 1 if the attributes are present and valid, otherwise, return 0. */
3149 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
3150 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
)
3152 struct objfile
*objfile
= cu
->objfile
;
3153 struct comp_unit_head
*cu_header
= &cu
->header
;
3154 bfd
*obfd
= objfile
->obfd
;
3155 unsigned int addr_size
= cu_header
->addr_size
;
3156 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3157 /* Base address selection entry. */
3167 found_base
= cu_header
->base_known
;
3168 base
= cu_header
->base_address
;
3170 if (offset
>= dwarf2_per_objfile
->ranges_size
)
3172 complaint (&symfile_complaints
,
3173 _("Offset %d out of bounds for DW_AT_ranges attribute"),
3177 buffer
= dwarf2_per_objfile
->ranges_buffer
+ offset
;
3179 /* Read in the largest possible address. */
3180 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
3181 if ((marker
& mask
) == mask
)
3183 /* If we found the largest possible address, then
3184 read the base address. */
3185 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3186 buffer
+= 2 * addr_size
;
3187 offset
+= 2 * addr_size
;
3195 CORE_ADDR range_beginning
, range_end
;
3197 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
3198 buffer
+= addr_size
;
3199 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
3200 buffer
+= addr_size
;
3201 offset
+= 2 * addr_size
;
3203 /* An end of list marker is a pair of zero addresses. */
3204 if (range_beginning
== 0 && range_end
== 0)
3205 /* Found the end of list entry. */
3208 /* Each base address selection entry is a pair of 2 values.
3209 The first is the largest possible address, the second is
3210 the base address. Check for a base address here. */
3211 if ((range_beginning
& mask
) == mask
)
3213 /* If we found the largest possible address, then
3214 read the base address. */
3215 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3222 /* We have no valid base address for the ranges
3224 complaint (&symfile_complaints
,
3225 _("Invalid .debug_ranges data (no base address)"));
3229 range_beginning
+= base
;
3232 /* FIXME: This is recording everything as a low-high
3233 segment of consecutive addresses. We should have a
3234 data structure for discontiguous block ranges
3238 low
= range_beginning
;
3244 if (range_beginning
< low
)
3245 low
= range_beginning
;
3246 if (range_end
> high
)
3252 /* If the first entry is an end-of-list marker, the range
3253 describes an empty scope, i.e. no instructions. */
3259 *high_return
= high
;
3263 /* Get low and high pc attributes from a die. Return 1 if the attributes
3264 are present and valid, otherwise, return 0. Return -1 if the range is
3265 discontinuous, i.e. derived from DW_AT_ranges information. */
3267 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
3268 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
3270 struct attribute
*attr
;
3275 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
3278 high
= DW_ADDR (attr
);
3279 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3281 low
= DW_ADDR (attr
);
3283 /* Found high w/o low attribute. */
3286 /* Found consecutive range of addresses. */
3291 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
3294 /* Value of the DW_AT_ranges attribute is the offset in the
3295 .debug_ranges section. */
3296 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
))
3298 /* Found discontinuous range of addresses. */
3306 /* When using the GNU linker, .gnu.linkonce. sections are used to
3307 eliminate duplicate copies of functions and vtables and such.
3308 The linker will arbitrarily choose one and discard the others.
3309 The AT_*_pc values for such functions refer to local labels in
3310 these sections. If the section from that file was discarded, the
3311 labels are not in the output, so the relocs get a value of 0.
3312 If this is a discarded function, mark the pc bounds as invalid,
3313 so that GDB will ignore it. */
3314 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3322 /* Get the low and high pc's represented by the scope DIE, and store
3323 them in *LOWPC and *HIGHPC. If the correct values can't be
3324 determined, set *LOWPC to -1 and *HIGHPC to 0. */
3327 get_scope_pc_bounds (struct die_info
*die
,
3328 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3329 struct dwarf2_cu
*cu
)
3331 CORE_ADDR best_low
= (CORE_ADDR
) -1;
3332 CORE_ADDR best_high
= (CORE_ADDR
) 0;
3333 CORE_ADDR current_low
, current_high
;
3335 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
))
3337 best_low
= current_low
;
3338 best_high
= current_high
;
3342 struct die_info
*child
= die
->child
;
3344 while (child
&& child
->tag
)
3346 switch (child
->tag
) {
3347 case DW_TAG_subprogram
:
3348 if (dwarf2_get_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
))
3350 best_low
= min (best_low
, current_low
);
3351 best_high
= max (best_high
, current_high
);
3354 case DW_TAG_namespace
:
3355 /* FIXME: carlton/2004-01-16: Should we do this for
3356 DW_TAG_class_type/DW_TAG_structure_type, too? I think
3357 that current GCC's always emit the DIEs corresponding
3358 to definitions of methods of classes as children of a
3359 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
3360 the DIEs giving the declarations, which could be
3361 anywhere). But I don't see any reason why the
3362 standards says that they have to be there. */
3363 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
3365 if (current_low
!= ((CORE_ADDR
) -1))
3367 best_low
= min (best_low
, current_low
);
3368 best_high
= max (best_high
, current_high
);
3376 child
= sibling_die (child
);
3381 *highpc
= best_high
;
3384 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
3387 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
3388 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
3390 struct attribute
*attr
;
3392 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
3395 CORE_ADDR high
= DW_ADDR (attr
);
3396 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3399 CORE_ADDR low
= DW_ADDR (attr
);
3400 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
3404 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
3407 bfd
*obfd
= cu
->objfile
->obfd
;
3409 /* The value of the DW_AT_ranges attribute is the offset of the
3410 address range list in the .debug_ranges section. */
3411 unsigned long offset
= DW_UNSND (attr
);
3412 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges_buffer
+ offset
;
3414 /* For some target architectures, but not others, the
3415 read_address function sign-extends the addresses it returns.
3416 To recognize base address selection entries, we need a
3418 unsigned int addr_size
= cu
->header
.addr_size
;
3419 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3421 /* The base address, to which the next pair is relative. Note
3422 that this 'base' is a DWARF concept: most entries in a range
3423 list are relative, to reduce the number of relocs against the
3424 debugging information. This is separate from this function's
3425 'baseaddr' argument, which GDB uses to relocate debugging
3426 information from a shared library based on the address at
3427 which the library was loaded. */
3428 CORE_ADDR base
= cu
->header
.base_address
;
3429 int base_known
= cu
->header
.base_known
;
3431 if (offset
>= dwarf2_per_objfile
->ranges_size
)
3433 complaint (&symfile_complaints
,
3434 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
3441 unsigned int bytes_read
;
3442 CORE_ADDR start
, end
;
3444 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
3445 buffer
+= bytes_read
;
3446 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
3447 buffer
+= bytes_read
;
3449 /* Did we find the end of the range list? */
3450 if (start
== 0 && end
== 0)
3453 /* Did we find a base address selection entry? */
3454 else if ((start
& base_select_mask
) == base_select_mask
)
3460 /* We found an ordinary address range. */
3465 complaint (&symfile_complaints
,
3466 _("Invalid .debug_ranges data (no base address)"));
3470 record_block_range (block
,
3471 baseaddr
+ base
+ start
,
3472 baseaddr
+ base
+ end
- 1);
3478 /* Add an aggregate field to the field list. */
3481 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
3482 struct dwarf2_cu
*cu
)
3484 struct objfile
*objfile
= cu
->objfile
;
3485 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3486 struct nextfield
*new_field
;
3487 struct attribute
*attr
;
3489 char *fieldname
= "";
3491 /* Allocate a new field list entry and link it in. */
3492 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
3493 make_cleanup (xfree
, new_field
);
3494 memset (new_field
, 0, sizeof (struct nextfield
));
3495 new_field
->next
= fip
->fields
;
3496 fip
->fields
= new_field
;
3499 /* Handle accessibility and virtuality of field.
3500 The default accessibility for members is public, the default
3501 accessibility for inheritance is private. */
3502 if (die
->tag
!= DW_TAG_inheritance
)
3503 new_field
->accessibility
= DW_ACCESS_public
;
3505 new_field
->accessibility
= DW_ACCESS_private
;
3506 new_field
->virtuality
= DW_VIRTUALITY_none
;
3508 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3510 new_field
->accessibility
= DW_UNSND (attr
);
3511 if (new_field
->accessibility
!= DW_ACCESS_public
)
3512 fip
->non_public_fields
= 1;
3513 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
3515 new_field
->virtuality
= DW_UNSND (attr
);
3517 fp
= &new_field
->field
;
3519 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
3521 /* Data member other than a C++ static data member. */
3523 /* Get type of field. */
3524 fp
->type
= die_type (die
, cu
);
3526 FIELD_STATIC_KIND (*fp
) = 0;
3528 /* Get bit size of field (zero if none). */
3529 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
3532 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
3536 FIELD_BITSIZE (*fp
) = 0;
3539 /* Get bit offset of field. */
3540 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3545 if (attr_form_is_section_offset (attr
))
3547 dwarf2_complex_location_expr_complaint ();
3550 else if (attr_form_is_constant (attr
))
3551 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
3553 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
3555 FIELD_BITPOS (*fp
) = byte_offset
* bits_per_byte
;
3558 FIELD_BITPOS (*fp
) = 0;
3559 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
3562 if (gdbarch_bits_big_endian (gdbarch
))
3564 /* For big endian bits, the DW_AT_bit_offset gives the
3565 additional bit offset from the MSB of the containing
3566 anonymous object to the MSB of the field. We don't
3567 have to do anything special since we don't need to
3568 know the size of the anonymous object. */
3569 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
3573 /* For little endian bits, compute the bit offset to the
3574 MSB of the anonymous object, subtract off the number of
3575 bits from the MSB of the field to the MSB of the
3576 object, and then subtract off the number of bits of
3577 the field itself. The result is the bit offset of
3578 the LSB of the field. */
3580 int bit_offset
= DW_UNSND (attr
);
3582 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
3585 /* The size of the anonymous object containing
3586 the bit field is explicit, so use the
3587 indicated size (in bytes). */
3588 anonymous_size
= DW_UNSND (attr
);
3592 /* The size of the anonymous object containing
3593 the bit field must be inferred from the type
3594 attribute of the data member containing the
3596 anonymous_size
= TYPE_LENGTH (fp
->type
);
3598 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
3599 - bit_offset
- FIELD_BITSIZE (*fp
);
3603 /* Get name of field. */
3604 fieldname
= dwarf2_name (die
, cu
);
3605 if (fieldname
== NULL
)
3608 /* The name is already allocated along with this objfile, so we don't
3609 need to duplicate it for the type. */
3610 fp
->name
= fieldname
;
3612 /* Change accessibility for artificial fields (e.g. virtual table
3613 pointer or virtual base class pointer) to private. */
3614 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
3616 new_field
->accessibility
= DW_ACCESS_private
;
3617 fip
->non_public_fields
= 1;
3620 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
3622 /* C++ static member. */
3624 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
3625 is a declaration, but all versions of G++ as of this writing
3626 (so through at least 3.2.1) incorrectly generate
3627 DW_TAG_variable tags. */
3631 /* Get name of field. */
3632 fieldname
= dwarf2_name (die
, cu
);
3633 if (fieldname
== NULL
)
3636 /* Get physical name. */
3637 physname
= dwarf2_linkage_name (die
, cu
);
3639 /* The name is already allocated along with this objfile, so we don't
3640 need to duplicate it for the type. */
3641 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
3642 FIELD_TYPE (*fp
) = die_type (die
, cu
);
3643 FIELD_NAME (*fp
) = fieldname
;
3645 else if (die
->tag
== DW_TAG_inheritance
)
3647 /* C++ base class field. */
3648 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3650 FIELD_BITPOS (*fp
) = (decode_locdesc (DW_BLOCK (attr
), cu
)
3652 FIELD_BITSIZE (*fp
) = 0;
3653 FIELD_STATIC_KIND (*fp
) = 0;
3654 FIELD_TYPE (*fp
) = die_type (die
, cu
);
3655 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
3656 fip
->nbaseclasses
++;
3660 /* Create the vector of fields, and attach it to the type. */
3663 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3664 struct dwarf2_cu
*cu
)
3666 int nfields
= fip
->nfields
;
3668 /* Record the field count, allocate space for the array of fields,
3669 and create blank accessibility bitfields if necessary. */
3670 TYPE_NFIELDS (type
) = nfields
;
3671 TYPE_FIELDS (type
) = (struct field
*)
3672 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3673 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3675 if (fip
->non_public_fields
)
3677 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3679 TYPE_FIELD_PRIVATE_BITS (type
) =
3680 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3681 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3683 TYPE_FIELD_PROTECTED_BITS (type
) =
3684 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3685 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3687 TYPE_FIELD_IGNORE_BITS (type
) =
3688 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3689 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3692 /* If the type has baseclasses, allocate and clear a bit vector for
3693 TYPE_FIELD_VIRTUAL_BITS. */
3694 if (fip
->nbaseclasses
)
3696 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
3697 unsigned char *pointer
;
3699 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3700 pointer
= TYPE_ALLOC (type
, num_bytes
);
3701 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
3702 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
3703 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
3706 /* Copy the saved-up fields into the field vector. Start from the head
3707 of the list, adding to the tail of the field array, so that they end
3708 up in the same order in the array in which they were added to the list. */
3709 while (nfields
-- > 0)
3711 TYPE_FIELD (type
, nfields
) = fip
->fields
->field
;
3712 switch (fip
->fields
->accessibility
)
3714 case DW_ACCESS_private
:
3715 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3718 case DW_ACCESS_protected
:
3719 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3722 case DW_ACCESS_public
:
3726 /* Unknown accessibility. Complain and treat it as public. */
3728 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
3729 fip
->fields
->accessibility
);
3733 if (nfields
< fip
->nbaseclasses
)
3735 switch (fip
->fields
->virtuality
)
3737 case DW_VIRTUALITY_virtual
:
3738 case DW_VIRTUALITY_pure_virtual
:
3739 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
3743 fip
->fields
= fip
->fields
->next
;
3747 /* Add a member function to the proper fieldlist. */
3750 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
3751 struct type
*type
, struct dwarf2_cu
*cu
)
3753 struct objfile
*objfile
= cu
->objfile
;
3754 struct attribute
*attr
;
3755 struct fnfieldlist
*flp
;
3757 struct fn_field
*fnp
;
3760 struct nextfnfield
*new_fnfield
;
3762 /* Get name of member function. */
3763 fieldname
= dwarf2_name (die
, cu
);
3764 if (fieldname
== NULL
)
3767 /* Get the mangled name. */
3768 physname
= dwarf2_linkage_name (die
, cu
);
3770 /* Look up member function name in fieldlist. */
3771 for (i
= 0; i
< fip
->nfnfields
; i
++)
3773 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
3777 /* Create new list element if necessary. */
3778 if (i
< fip
->nfnfields
)
3779 flp
= &fip
->fnfieldlists
[i
];
3782 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
3784 fip
->fnfieldlists
= (struct fnfieldlist
*)
3785 xrealloc (fip
->fnfieldlists
,
3786 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
3787 * sizeof (struct fnfieldlist
));
3788 if (fip
->nfnfields
== 0)
3789 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
3791 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
3792 flp
->name
= fieldname
;
3798 /* Create a new member function field and chain it to the field list
3800 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
3801 make_cleanup (xfree
, new_fnfield
);
3802 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
3803 new_fnfield
->next
= flp
->head
;
3804 flp
->head
= new_fnfield
;
3807 /* Fill in the member function field info. */
3808 fnp
= &new_fnfield
->fnfield
;
3809 /* The name is already allocated along with this objfile, so we don't
3810 need to duplicate it for the type. */
3811 fnp
->physname
= physname
? physname
: "";
3812 fnp
->type
= alloc_type (objfile
);
3813 if (die
->type
&& TYPE_CODE (die
->type
) == TYPE_CODE_FUNC
)
3815 int nparams
= TYPE_NFIELDS (die
->type
);
3817 /* TYPE is the domain of this method, and DIE->TYPE is the type
3818 of the method itself (TYPE_CODE_METHOD). */
3819 smash_to_method_type (fnp
->type
, type
,
3820 TYPE_TARGET_TYPE (die
->type
),
3821 TYPE_FIELDS (die
->type
),
3822 TYPE_NFIELDS (die
->type
),
3823 TYPE_VARARGS (die
->type
));
3825 /* Handle static member functions.
3826 Dwarf2 has no clean way to discern C++ static and non-static
3827 member functions. G++ helps GDB by marking the first
3828 parameter for non-static member functions (which is the
3829 this pointer) as artificial. We obtain this information
3830 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
3831 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (die
->type
, 0) == 0)
3832 fnp
->voffset
= VOFFSET_STATIC
;
3835 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
3838 /* Get fcontext from DW_AT_containing_type if present. */
3839 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
3840 fnp
->fcontext
= die_containing_type (die
, cu
);
3842 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
3843 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
3845 /* Get accessibility. */
3846 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3849 switch (DW_UNSND (attr
))
3851 case DW_ACCESS_private
:
3852 fnp
->is_private
= 1;
3854 case DW_ACCESS_protected
:
3855 fnp
->is_protected
= 1;
3860 /* Check for artificial methods. */
3861 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
3862 if (attr
&& DW_UNSND (attr
) != 0)
3863 fnp
->is_artificial
= 1;
3865 /* Get index in virtual function table if it is a virtual member function. */
3866 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
3869 /* Support the .debug_loc offsets */
3870 if (attr_form_is_block (attr
))
3872 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
3874 else if (attr_form_is_section_offset (attr
))
3876 dwarf2_complex_location_expr_complaint ();
3880 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
3886 /* Create the vector of member function fields, and attach it to the type. */
3889 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
3890 struct dwarf2_cu
*cu
)
3892 struct fnfieldlist
*flp
;
3893 int total_length
= 0;
3896 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3897 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
3898 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
3900 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
3902 struct nextfnfield
*nfp
= flp
->head
;
3903 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
3906 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
3907 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
3908 fn_flp
->fn_fields
= (struct fn_field
*)
3909 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
3910 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
3911 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
3913 total_length
+= flp
->length
;
3916 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
3917 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
3920 /* Returns non-zero if NAME is the name of a vtable member in CU's
3921 language, zero otherwise. */
3923 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
3925 static const char vptr
[] = "_vptr";
3926 static const char vtable
[] = "vtable";
3928 /* Look for the C++ and Java forms of the vtable. */
3929 if ((cu
->language
== language_java
3930 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
3931 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
3932 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
3938 /* GCC outputs unnamed structures that are really pointers to member
3939 functions, with the ABI-specified layout. If DIE (from CU) describes
3940 such a structure, set its type, and return nonzero. Otherwise return
3943 GCC shouldn't do this; it should just output pointer to member DIEs.
3944 This is GCC PR debug/28767. */
3947 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
3949 struct objfile
*objfile
= cu
->objfile
;
3951 struct die_info
*pfn_die
, *delta_die
;
3952 struct attribute
*pfn_name
, *delta_name
;
3953 struct type
*pfn_type
, *domain_type
;
3955 /* Check for a structure with no name and two children. */
3956 if (die
->tag
!= DW_TAG_structure_type
3957 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
3958 || die
->child
== NULL
3959 || die
->child
->sibling
== NULL
3960 || (die
->child
->sibling
->sibling
!= NULL
3961 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
3964 /* Check for __pfn and __delta members. */
3965 pfn_die
= die
->child
;
3966 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
3967 if (pfn_die
->tag
!= DW_TAG_member
3969 || DW_STRING (pfn_name
) == NULL
3970 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
3973 delta_die
= pfn_die
->sibling
;
3974 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
3975 if (delta_die
->tag
!= DW_TAG_member
3976 || delta_name
== NULL
3977 || DW_STRING (delta_name
) == NULL
3978 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
3981 /* Find the type of the method. */
3982 pfn_type
= die_type (pfn_die
, cu
);
3983 if (pfn_type
== NULL
3984 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
3985 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
3988 /* Look for the "this" argument. */
3989 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
3990 if (TYPE_NFIELDS (pfn_type
) == 0
3991 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
3994 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
3995 type
= alloc_type (objfile
);
3996 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
3997 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
3998 TYPE_VARARGS (pfn_type
));
3999 type
= lookup_methodptr_type (type
);
4000 set_die_type (die
, type
, cu
);
4005 /* Called when we find the DIE that starts a structure or union scope
4006 (definition) to process all dies that define the members of the
4009 NOTE: we need to call struct_type regardless of whether or not the
4010 DIE has an at_name attribute, since it might be an anonymous
4011 structure or union. This gets the type entered into our set of
4014 However, if the structure is incomplete (an opaque struct/union)
4015 then suppress creating a symbol table entry for it since gdb only
4016 wants to find the one with the complete definition. Note that if
4017 it is complete, we just call new_symbol, which does it's own
4018 checking about whether the struct/union is anonymous or not (and
4019 suppresses creating a symbol table entry itself). */
4022 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4024 struct objfile
*objfile
= cu
->objfile
;
4026 struct attribute
*attr
;
4027 const char *previous_prefix
= processing_current_prefix
;
4028 struct cleanup
*back_to
= NULL
;
4034 if (quirk_gcc_member_function_pointer (die
, cu
))
4037 type
= alloc_type (objfile
);
4038 INIT_CPLUS_SPECIFIC (type
);
4039 name
= dwarf2_name (die
, cu
);
4042 if (cu
->language
== language_cplus
4043 || cu
->language
== language_java
)
4045 char *new_prefix
= determine_class_name (die
, cu
);
4046 TYPE_TAG_NAME (type
) = obsavestring (new_prefix
,
4047 strlen (new_prefix
),
4048 &objfile
->objfile_obstack
);
4049 back_to
= make_cleanup (xfree
, new_prefix
);
4050 processing_current_prefix
= new_prefix
;
4054 /* The name is already allocated along with this objfile, so
4055 we don't need to duplicate it for the type. */
4056 TYPE_TAG_NAME (type
) = name
;
4060 if (die
->tag
== DW_TAG_structure_type
)
4062 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
4064 else if (die
->tag
== DW_TAG_union_type
)
4066 TYPE_CODE (type
) = TYPE_CODE_UNION
;
4070 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
4072 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
4075 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4078 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4082 TYPE_LENGTH (type
) = 0;
4085 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB_SUPPORTED
;
4086 if (die_is_declaration (die
, cu
))
4087 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
4089 /* We need to add the type field to the die immediately so we don't
4090 infinitely recurse when dealing with pointers to the structure
4091 type within the structure itself. */
4092 set_die_type (die
, type
, cu
);
4094 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
4096 struct field_info fi
;
4097 struct die_info
*child_die
;
4098 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
4100 memset (&fi
, 0, sizeof (struct field_info
));
4102 child_die
= die
->child
;
4104 while (child_die
&& child_die
->tag
)
4106 if (child_die
->tag
== DW_TAG_member
4107 || child_die
->tag
== DW_TAG_variable
)
4109 /* NOTE: carlton/2002-11-05: A C++ static data member
4110 should be a DW_TAG_member that is a declaration, but
4111 all versions of G++ as of this writing (so through at
4112 least 3.2.1) incorrectly generate DW_TAG_variable
4113 tags for them instead. */
4114 dwarf2_add_field (&fi
, child_die
, cu
);
4116 else if (child_die
->tag
== DW_TAG_subprogram
)
4118 /* C++ member function. */
4119 read_type_die (child_die
, cu
);
4120 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
4122 else if (child_die
->tag
== DW_TAG_inheritance
)
4124 /* C++ base class field. */
4125 dwarf2_add_field (&fi
, child_die
, cu
);
4127 child_die
= sibling_die (child_die
);
4130 /* Attach fields and member functions to the type. */
4132 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
4135 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
4137 /* Get the type which refers to the base class (possibly this
4138 class itself) which contains the vtable pointer for the current
4139 class from the DW_AT_containing_type attribute. */
4141 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4143 struct type
*t
= die_containing_type (die
, cu
);
4145 TYPE_VPTR_BASETYPE (type
) = t
;
4150 /* Our own class provides vtbl ptr. */
4151 for (i
= TYPE_NFIELDS (t
) - 1;
4152 i
>= TYPE_N_BASECLASSES (t
);
4155 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
4157 if (is_vtable_name (fieldname
, cu
))
4159 TYPE_VPTR_FIELDNO (type
) = i
;
4164 /* Complain if virtual function table field not found. */
4165 if (i
< TYPE_N_BASECLASSES (t
))
4166 complaint (&symfile_complaints
,
4167 _("virtual function table pointer not found when defining class '%s'"),
4168 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
4173 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
4176 else if (cu
->producer
4177 && strncmp (cu
->producer
,
4178 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
4180 /* The IBM XLC compiler does not provide direct indication
4181 of the containing type, but the vtable pointer is
4182 always named __vfp. */
4186 for (i
= TYPE_NFIELDS (type
) - 1;
4187 i
>= TYPE_N_BASECLASSES (type
);
4190 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
4192 TYPE_VPTR_FIELDNO (type
) = i
;
4193 TYPE_VPTR_BASETYPE (type
) = type
;
4200 do_cleanups (back_to
);
4203 processing_current_prefix
= previous_prefix
;
4204 if (back_to
!= NULL
)
4205 do_cleanups (back_to
);
4209 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4211 struct objfile
*objfile
= cu
->objfile
;
4212 const char *previous_prefix
= processing_current_prefix
;
4213 struct die_info
*child_die
= die
->child
;
4215 if (TYPE_TAG_NAME (die
->type
) != NULL
)
4216 processing_current_prefix
= TYPE_TAG_NAME (die
->type
);
4218 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
4219 snapshots) has been known to create a die giving a declaration
4220 for a class that has, as a child, a die giving a definition for a
4221 nested class. So we have to process our children even if the
4222 current die is a declaration. Normally, of course, a declaration
4223 won't have any children at all. */
4225 while (child_die
!= NULL
&& child_die
->tag
)
4227 if (child_die
->tag
== DW_TAG_member
4228 || child_die
->tag
== DW_TAG_variable
4229 || child_die
->tag
== DW_TAG_inheritance
)
4234 process_die (child_die
, cu
);
4236 child_die
= sibling_die (child_die
);
4239 /* Do not consider external references. According to the DWARF standard,
4240 these DIEs are identified by the fact that they have no byte_size
4241 attribute, and a declaration attribute. */
4242 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
4243 || !die_is_declaration (die
, cu
))
4244 new_symbol (die
, die
->type
, cu
);
4246 processing_current_prefix
= previous_prefix
;
4249 /* Given a DW_AT_enumeration_type die, set its type. We do not
4250 complete the type's fields yet, or create any symbols. */
4253 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4255 struct objfile
*objfile
= cu
->objfile
;
4257 struct attribute
*attr
;
4263 type
= alloc_type (objfile
);
4265 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
4266 name
= dwarf2_name (die
, cu
);
4269 if (processing_has_namespace_info
)
4271 TYPE_TAG_NAME (type
) = typename_concat (&objfile
->objfile_obstack
,
4272 processing_current_prefix
,
4277 /* The name is already allocated along with this objfile, so
4278 we don't need to duplicate it for the type. */
4279 TYPE_TAG_NAME (type
) = name
;
4283 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4286 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4290 TYPE_LENGTH (type
) = 0;
4293 /* The enumeration DIE can be incomplete. In Ada, any type can be
4294 declared as private in the package spec, and then defined only
4295 inside the package body. Such types are known as Taft Amendment
4296 Types. When another package uses such a type, an incomplete DIE
4297 may be generated by the compiler. */
4298 if (die_is_declaration (die
, cu
))
4299 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
4301 set_die_type (die
, type
, cu
);
4304 /* Determine the name of the type represented by DIE, which should be
4305 a named C++ or Java compound type. Return the name in question; the caller
4306 is responsible for xfree()'ing it. */
4309 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
4311 struct cleanup
*back_to
= NULL
;
4312 struct die_info
*spec_die
= die_specification (die
, cu
);
4313 char *new_prefix
= NULL
;
4315 /* If this is the definition of a class that is declared by another
4316 die, then processing_current_prefix may not be accurate; see
4317 read_func_scope for a similar example. */
4318 if (spec_die
!= NULL
)
4320 char *specification_prefix
= determine_prefix (spec_die
, cu
);
4321 processing_current_prefix
= specification_prefix
;
4322 back_to
= make_cleanup (xfree
, specification_prefix
);
4325 /* If we don't have namespace debug info, guess the name by trying
4326 to demangle the names of members, just like we did in
4327 guess_structure_name. */
4328 if (!processing_has_namespace_info
)
4330 struct die_info
*child
;
4332 for (child
= die
->child
;
4333 child
!= NULL
&& child
->tag
!= 0;
4334 child
= sibling_die (child
))
4336 if (child
->tag
== DW_TAG_subprogram
)
4339 = language_class_name_from_physname (cu
->language_defn
,
4343 if (new_prefix
!= NULL
)
4349 if (new_prefix
== NULL
)
4351 const char *name
= dwarf2_name (die
, cu
);
4352 new_prefix
= typename_concat (NULL
, processing_current_prefix
,
4353 name
? name
: "<<anonymous>>",
4357 if (back_to
!= NULL
)
4358 do_cleanups (back_to
);
4363 /* Given a pointer to a die which begins an enumeration, process all
4364 the dies that define the members of the enumeration, and create the
4365 symbol for the enumeration type.
4367 NOTE: We reverse the order of the element list. */
4370 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4372 struct objfile
*objfile
= cu
->objfile
;
4373 struct die_info
*child_die
;
4374 struct field
*fields
;
4377 int unsigned_enum
= 1;
4382 if (die
->child
!= NULL
)
4384 child_die
= die
->child
;
4385 while (child_die
&& child_die
->tag
)
4387 if (child_die
->tag
!= DW_TAG_enumerator
)
4389 process_die (child_die
, cu
);
4393 name
= dwarf2_name (child_die
, cu
);
4396 sym
= new_symbol (child_die
, die
->type
, cu
);
4397 if (SYMBOL_VALUE (sym
) < 0)
4400 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4402 fields
= (struct field
*)
4404 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
4405 * sizeof (struct field
));
4408 FIELD_NAME (fields
[num_fields
]) = DEPRECATED_SYMBOL_NAME (sym
);
4409 FIELD_TYPE (fields
[num_fields
]) = NULL
;
4410 FIELD_BITPOS (fields
[num_fields
]) = SYMBOL_VALUE (sym
);
4411 FIELD_BITSIZE (fields
[num_fields
]) = 0;
4412 FIELD_STATIC_KIND (fields
[num_fields
]) = 0;
4418 child_die
= sibling_die (child_die
);
4423 TYPE_NFIELDS (die
->type
) = num_fields
;
4424 TYPE_FIELDS (die
->type
) = (struct field
*)
4425 TYPE_ALLOC (die
->type
, sizeof (struct field
) * num_fields
);
4426 memcpy (TYPE_FIELDS (die
->type
), fields
,
4427 sizeof (struct field
) * num_fields
);
4431 TYPE_FLAGS (die
->type
) |= TYPE_FLAG_UNSIGNED
;
4434 new_symbol (die
, die
->type
, cu
);
4437 /* Extract all information from a DW_TAG_array_type DIE and put it in
4438 the DIE's type field. For now, this only handles one dimensional
4442 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4444 struct objfile
*objfile
= cu
->objfile
;
4445 struct die_info
*child_die
;
4446 struct type
*type
= NULL
;
4447 struct type
*element_type
, *range_type
, *index_type
;
4448 struct type
**range_types
= NULL
;
4449 struct attribute
*attr
;
4451 struct cleanup
*back_to
;
4454 /* Return if we've already decoded this type. */
4460 element_type
= die_type (die
, cu
);
4462 /* Irix 6.2 native cc creates array types without children for
4463 arrays with unspecified length. */
4464 if (die
->child
== NULL
)
4466 index_type
= builtin_type_int32
;
4467 range_type
= create_range_type (NULL
, index_type
, 0, -1);
4468 set_die_type (die
, create_array_type (NULL
, element_type
, range_type
),
4473 back_to
= make_cleanup (null_cleanup
, NULL
);
4474 child_die
= die
->child
;
4475 while (child_die
&& child_die
->tag
)
4477 if (child_die
->tag
== DW_TAG_subrange_type
)
4479 read_subrange_type (child_die
, cu
);
4481 if (child_die
->type
!= NULL
)
4483 /* The range type was succesfully read. Save it for
4484 the array type creation. */
4485 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
4487 range_types
= (struct type
**)
4488 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
4489 * sizeof (struct type
*));
4491 make_cleanup (free_current_contents
, &range_types
);
4493 range_types
[ndim
++] = child_die
->type
;
4496 child_die
= sibling_die (child_die
);
4499 /* Dwarf2 dimensions are output from left to right, create the
4500 necessary array types in backwards order. */
4502 type
= element_type
;
4504 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
4508 type
= create_array_type (NULL
, type
, range_types
[i
++]);
4513 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
4516 /* Understand Dwarf2 support for vector types (like they occur on
4517 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
4518 array type. This is not part of the Dwarf2/3 standard yet, but a
4519 custom vendor extension. The main difference between a regular
4520 array and the vector variant is that vectors are passed by value
4522 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
4524 make_vector_type (type
);
4526 name
= dwarf2_name (die
, cu
);
4528 TYPE_NAME (type
) = name
;
4530 do_cleanups (back_to
);
4532 /* Install the type in the die. */
4533 set_die_type (die
, type
, cu
);
4536 static enum dwarf_array_dim_ordering
4537 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
4539 struct attribute
*attr
;
4541 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
4543 if (attr
) return DW_SND (attr
);
4546 GNU F77 is a special case, as at 08/2004 array type info is the
4547 opposite order to the dwarf2 specification, but data is still
4548 laid out as per normal fortran.
4550 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
4554 if (cu
->language
== language_fortran
&&
4555 cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
4557 return DW_ORD_row_major
;
4560 switch (cu
->language_defn
->la_array_ordering
)
4562 case array_column_major
:
4563 return DW_ORD_col_major
;
4564 case array_row_major
:
4566 return DW_ORD_row_major
;
4570 /* Extract all information from a DW_TAG_set_type DIE and put it in
4571 the DIE's type field. */
4574 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4576 if (die
->type
== NULL
)
4577 die
->type
= create_set_type ((struct type
*) NULL
, die_type (die
, cu
));
4580 /* First cut: install each common block member as a global variable. */
4583 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
4585 struct die_info
*child_die
;
4586 struct attribute
*attr
;
4588 CORE_ADDR base
= (CORE_ADDR
) 0;
4590 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
4593 /* Support the .debug_loc offsets */
4594 if (attr_form_is_block (attr
))
4596 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
4598 else if (attr_form_is_section_offset (attr
))
4600 dwarf2_complex_location_expr_complaint ();
4604 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
4605 "common block member");
4608 if (die
->child
!= NULL
)
4610 child_die
= die
->child
;
4611 while (child_die
&& child_die
->tag
)
4613 sym
= new_symbol (child_die
, NULL
, cu
);
4614 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
4617 SYMBOL_VALUE_ADDRESS (sym
) =
4618 base
+ decode_locdesc (DW_BLOCK (attr
), cu
);
4619 add_symbol_to_list (sym
, &global_symbols
);
4621 child_die
= sibling_die (child_die
);
4626 /* Read a C++ namespace. */
4629 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4631 struct objfile
*objfile
= cu
->objfile
;
4632 const char *previous_prefix
= processing_current_prefix
;
4635 struct die_info
*current_die
;
4636 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4638 name
= namespace_name (die
, &is_anonymous
, cu
);
4640 /* Now build the name of the current namespace. */
4642 if (previous_prefix
[0] == '\0')
4644 processing_current_prefix
= name
;
4648 char *temp_name
= typename_concat (NULL
, previous_prefix
, name
, cu
);
4649 make_cleanup (xfree
, temp_name
);
4650 processing_current_prefix
= temp_name
;
4653 /* Add a symbol associated to this if we haven't seen the namespace
4654 before. Also, add a using directive if it's an anonymous
4657 if (dwarf2_extension (die
, cu
) == NULL
)
4661 /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
4662 this cast will hopefully become unnecessary. */
4663 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0,
4664 (char *) processing_current_prefix
,
4666 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
4668 new_symbol (die
, type
, cu
);
4669 set_die_type (die
, type
, cu
);
4672 cp_add_using_directive (processing_current_prefix
,
4673 strlen (previous_prefix
),
4674 strlen (processing_current_prefix
));
4677 if (die
->child
!= NULL
)
4679 struct die_info
*child_die
= die
->child
;
4681 while (child_die
&& child_die
->tag
)
4683 process_die (child_die
, cu
);
4684 child_die
= sibling_die (child_die
);
4688 processing_current_prefix
= previous_prefix
;
4689 do_cleanups (back_to
);
4692 /* Return the name of the namespace represented by DIE. Set
4693 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
4697 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
4699 struct die_info
*current_die
;
4700 const char *name
= NULL
;
4702 /* Loop through the extensions until we find a name. */
4704 for (current_die
= die
;
4705 current_die
!= NULL
;
4706 current_die
= dwarf2_extension (die
, cu
))
4708 name
= dwarf2_name (current_die
, cu
);
4713 /* Is it an anonymous namespace? */
4715 *is_anonymous
= (name
== NULL
);
4717 name
= "(anonymous namespace)";
4722 /* Extract all information from a DW_TAG_pointer_type DIE and add to
4723 the user defined type vector. */
4726 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4728 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
4729 struct comp_unit_head
*cu_header
= &cu
->header
;
4731 struct attribute
*attr_byte_size
;
4732 struct attribute
*attr_address_class
;
4733 int byte_size
, addr_class
;
4740 type
= lookup_pointer_type (die_type (die
, cu
));
4742 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4744 byte_size
= DW_UNSND (attr_byte_size
);
4746 byte_size
= cu_header
->addr_size
;
4748 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
4749 if (attr_address_class
)
4750 addr_class
= DW_UNSND (attr_address_class
);
4752 addr_class
= DW_ADDR_none
;
4754 /* If the pointer size or address class is different than the
4755 default, create a type variant marked as such and set the
4756 length accordingly. */
4757 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
4759 if (gdbarch_address_class_type_flags_p (gdbarch
))
4763 type_flags
= gdbarch_address_class_type_flags
4764 (gdbarch
, byte_size
, addr_class
);
4765 gdb_assert ((type_flags
& ~TYPE_FLAG_ADDRESS_CLASS_ALL
) == 0);
4766 type
= make_type_with_address_space (type
, type_flags
);
4768 else if (TYPE_LENGTH (type
) != byte_size
)
4770 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
4773 /* Should we also complain about unhandled address classes? */
4777 TYPE_LENGTH (type
) = byte_size
;
4778 set_die_type (die
, type
, cu
);
4781 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
4782 the user defined type vector. */
4785 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4787 struct objfile
*objfile
= cu
->objfile
;
4789 struct type
*to_type
;
4790 struct type
*domain
;
4797 to_type
= die_type (die
, cu
);
4798 domain
= die_containing_type (die
, cu
);
4800 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
4801 type
= lookup_methodptr_type (to_type
);
4803 type
= lookup_memberptr_type (to_type
, domain
);
4805 set_die_type (die
, type
, cu
);
4808 /* Extract all information from a DW_TAG_reference_type DIE and add to
4809 the user defined type vector. */
4812 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4814 struct comp_unit_head
*cu_header
= &cu
->header
;
4816 struct attribute
*attr
;
4823 type
= lookup_reference_type (die_type (die
, cu
));
4824 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4827 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4831 TYPE_LENGTH (type
) = cu_header
->addr_size
;
4833 set_die_type (die
, type
, cu
);
4837 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4839 struct type
*base_type
;
4846 base_type
= die_type (die
, cu
);
4847 set_die_type (die
, make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0),
4852 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4854 struct type
*base_type
;
4861 base_type
= die_type (die
, cu
);
4862 set_die_type (die
, make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0),
4866 /* Extract all information from a DW_TAG_string_type DIE and add to
4867 the user defined type vector. It isn't really a user defined type,
4868 but it behaves like one, with other DIE's using an AT_user_def_type
4869 attribute to reference it. */
4872 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4874 struct objfile
*objfile
= cu
->objfile
;
4875 struct type
*type
, *range_type
, *index_type
, *char_type
;
4876 struct attribute
*attr
;
4877 unsigned int length
;
4884 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
4887 length
= DW_UNSND (attr
);
4891 /* check for the DW_AT_byte_size attribute */
4892 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4895 length
= DW_UNSND (attr
);
4903 index_type
= builtin_type_int32
;
4904 range_type
= create_range_type (NULL
, index_type
, 1, length
);
4905 type
= create_string_type (NULL
, range_type
);
4907 set_die_type (die
, type
, cu
);
4910 /* Handle DIES due to C code like:
4914 int (*funcp)(int a, long l);
4918 ('funcp' generates a DW_TAG_subroutine_type DIE)
4922 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4924 struct type
*type
; /* Type that this function returns */
4925 struct type
*ftype
; /* Function that returns above type */
4926 struct attribute
*attr
;
4928 /* Decode the type that this subroutine returns */
4933 type
= die_type (die
, cu
);
4934 ftype
= make_function_type (type
, (struct type
**) 0);
4936 /* All functions in C++, Pascal and Java have prototypes. */
4937 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
4938 if ((attr
&& (DW_UNSND (attr
) != 0))
4939 || cu
->language
== language_cplus
4940 || cu
->language
== language_java
4941 || cu
->language
== language_pascal
)
4942 TYPE_FLAGS (ftype
) |= TYPE_FLAG_PROTOTYPED
;
4944 /* Store the calling convention in the type if it's available in
4945 the subroutine die. Otherwise set the calling convention to
4946 the default value DW_CC_normal. */
4947 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
4948 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
4950 if (die
->child
!= NULL
)
4952 struct die_info
*child_die
;
4956 /* Count the number of parameters.
4957 FIXME: GDB currently ignores vararg functions, but knows about
4958 vararg member functions. */
4959 child_die
= die
->child
;
4960 while (child_die
&& child_die
->tag
)
4962 if (child_die
->tag
== DW_TAG_formal_parameter
)
4964 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
4965 TYPE_FLAGS (ftype
) |= TYPE_FLAG_VARARGS
;
4966 child_die
= sibling_die (child_die
);
4969 /* Allocate storage for parameters and fill them in. */
4970 TYPE_NFIELDS (ftype
) = nparams
;
4971 TYPE_FIELDS (ftype
) = (struct field
*)
4972 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
4974 child_die
= die
->child
;
4975 while (child_die
&& child_die
->tag
)
4977 if (child_die
->tag
== DW_TAG_formal_parameter
)
4979 /* Dwarf2 has no clean way to discern C++ static and non-static
4980 member functions. G++ helps GDB by marking the first
4981 parameter for non-static member functions (which is the
4982 this pointer) as artificial. We pass this information
4983 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
4984 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
4986 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
4988 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
4989 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
4992 child_die
= sibling_die (child_die
);
4996 set_die_type (die
, ftype
, cu
);
5000 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
5002 struct objfile
*objfile
= cu
->objfile
;
5003 struct attribute
*attr
;
5008 name
= dwarf2_name (die
, cu
);
5009 set_die_type (die
, init_type (TYPE_CODE_TYPEDEF
, 0,
5010 TYPE_FLAG_TARGET_STUB
, name
, objfile
),
5012 TYPE_TARGET_TYPE (die
->type
) = die_type (die
, cu
);
5016 /* Find a representation of a given base type and install
5017 it in the TYPE field of the die. */
5020 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5022 struct objfile
*objfile
= cu
->objfile
;
5024 struct attribute
*attr
;
5025 int encoding
= 0, size
= 0;
5027 enum type_code code
= TYPE_CODE_INT
;
5029 struct type
*target_type
= NULL
;
5031 /* If we've already decoded this die, this is a no-op. */
5037 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
5040 encoding
= DW_UNSND (attr
);
5042 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5045 size
= DW_UNSND (attr
);
5047 name
= dwarf2_name (die
, cu
);
5050 complaint (&symfile_complaints
,
5051 _("DW_AT_name missing from DW_TAG_base_type"));
5056 case DW_ATE_address
:
5057 /* Turn DW_ATE_address into a void * pointer. */
5058 code
= TYPE_CODE_PTR
;
5059 type_flags
|= TYPE_FLAG_UNSIGNED
;
5060 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
5062 case DW_ATE_boolean
:
5063 code
= TYPE_CODE_BOOL
;
5064 type_flags
|= TYPE_FLAG_UNSIGNED
;
5066 case DW_ATE_complex_float
:
5067 code
= TYPE_CODE_COMPLEX
;
5068 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
5070 case DW_ATE_decimal_float
:
5071 code
= TYPE_CODE_DECFLOAT
;
5074 code
= TYPE_CODE_FLT
;
5078 case DW_ATE_unsigned
:
5079 type_flags
|= TYPE_FLAG_UNSIGNED
;
5081 case DW_ATE_signed_char
:
5082 if (cu
->language
== language_ada
|| cu
->language
== language_m2
)
5083 code
= TYPE_CODE_CHAR
;
5085 case DW_ATE_unsigned_char
:
5086 if (cu
->language
== language_ada
|| cu
->language
== language_m2
)
5087 code
= TYPE_CODE_CHAR
;
5088 type_flags
|= TYPE_FLAG_UNSIGNED
;
5091 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
5092 dwarf_type_encoding_name (encoding
));
5096 type
= init_type (code
, size
, type_flags
, name
, objfile
);
5097 TYPE_TARGET_TYPE (type
) = target_type
;
5099 set_die_type (die
, type
, cu
);
5102 /* Read the given DW_AT_subrange DIE. */
5105 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5107 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5108 struct type
*base_type
;
5109 struct type
*range_type
;
5110 struct attribute
*attr
;
5115 /* If we have already decoded this die, then nothing more to do. */
5119 base_type
= die_type (die
, cu
);
5120 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
5122 complaint (&symfile_complaints
,
5123 _("DW_AT_type missing from DW_TAG_subrange_type"));
5125 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
5126 0, NULL
, cu
->objfile
);
5129 if (cu
->language
== language_fortran
)
5131 /* FORTRAN implies a lower bound of 1, if not given. */
5135 /* FIXME: For variable sized arrays either of these could be
5136 a variable rather than a constant value. We'll allow it,
5137 but we don't know how to handle it. */
5138 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
5140 low
= dwarf2_get_attr_constant_value (attr
, 0);
5142 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
5145 if (attr
->form
== DW_FORM_block1
)
5147 /* GCC encodes arrays with unspecified or dynamic length
5148 with a DW_FORM_block1 attribute.
5149 FIXME: GDB does not yet know how to handle dynamic
5150 arrays properly, treat them as arrays with unspecified
5153 FIXME: jimb/2003-09-22: GDB does not really know
5154 how to handle arrays of unspecified length
5155 either; we just represent them as zero-length
5156 arrays. Choose an appropriate upper bound given
5157 the lower bound we've computed above. */
5161 high
= dwarf2_get_attr_constant_value (attr
, 1);
5164 range_type
= create_range_type (NULL
, base_type
, low
, high
);
5166 name
= dwarf2_name (die
, cu
);
5168 TYPE_NAME (range_type
) = name
;
5170 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5172 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
5174 set_die_type (die
, range_type
, cu
);
5178 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5185 /* For now, we only support the C meaning of an unspecified type: void. */
5187 type
= init_type (TYPE_CODE_VOID
, 0, 0, dwarf2_name (die
, cu
),
5190 set_die_type (die
, type
, cu
);
5193 /* Read a whole compilation unit into a linked list of dies. */
5195 static struct die_info
*
5196 read_comp_unit (gdb_byte
*info_ptr
, bfd
*abfd
, struct dwarf2_cu
*cu
)
5198 return read_die_and_children (info_ptr
, abfd
, cu
, &info_ptr
, NULL
);
5201 /* Read a single die and all its descendents. Set the die's sibling
5202 field to NULL; set other fields in the die correctly, and set all
5203 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
5204 location of the info_ptr after reading all of those dies. PARENT
5205 is the parent of the die in question. */
5207 static struct die_info
*
5208 read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
5209 struct dwarf2_cu
*cu
,
5210 gdb_byte
**new_info_ptr
,
5211 struct die_info
*parent
)
5213 struct die_info
*die
;
5217 cur_ptr
= read_full_die (&die
, abfd
, info_ptr
, cu
, &has_children
);
5218 store_in_ref_table (die
->offset
, die
, cu
);
5222 die
->child
= read_die_and_siblings (cur_ptr
, abfd
, cu
,
5228 *new_info_ptr
= cur_ptr
;
5231 die
->sibling
= NULL
;
5232 die
->parent
= parent
;
5236 /* Read a die, all of its descendents, and all of its siblings; set
5237 all of the fields of all of the dies correctly. Arguments are as
5238 in read_die_and_children. */
5240 static struct die_info
*
5241 read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
5242 struct dwarf2_cu
*cu
,
5243 gdb_byte
**new_info_ptr
,
5244 struct die_info
*parent
)
5246 struct die_info
*first_die
, *last_sibling
;
5250 first_die
= last_sibling
= NULL
;
5254 struct die_info
*die
5255 = read_die_and_children (cur_ptr
, abfd
, cu
, &cur_ptr
, parent
);
5263 last_sibling
->sibling
= die
;
5268 *new_info_ptr
= cur_ptr
;
5278 /* Free a linked list of dies. */
5281 free_die_list (struct die_info
*dies
)
5283 struct die_info
*die
, *next
;
5288 if (die
->child
!= NULL
)
5289 free_die_list (die
->child
);
5290 next
= die
->sibling
;
5297 /* Decompress a section that was compressed using zlib. Store the
5298 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
5301 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
5302 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
5304 bfd
*abfd
= objfile
->obfd
;
5306 error (_("Support for zlib-compressed DWARF data (from '%s') "
5307 "is disabled in this copy of GDB"),
5308 bfd_get_filename (abfd
));
5310 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
5311 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
5312 bfd_size_type uncompressed_size
;
5313 gdb_byte
*uncompressed_buffer
;
5316 int header_size
= 12;
5318 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
5319 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
5320 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5321 bfd_get_filename (abfd
));
5323 /* Read the zlib header. In this case, it should be "ZLIB" followed
5324 by the uncompressed section size, 8 bytes in big-endian order. */
5325 if (compressed_size
< header_size
5326 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
5327 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
5328 bfd_get_filename (abfd
));
5329 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
5330 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
5331 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
5332 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
5333 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
5334 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
5335 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
5336 uncompressed_size
+= compressed_buffer
[11];
5338 /* It is possible the section consists of several compressed
5339 buffers concatenated together, so we uncompress in a loop. */
5343 strm
.avail_in
= compressed_size
- header_size
;
5344 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
5345 strm
.avail_out
= uncompressed_size
;
5346 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
5348 rc
= inflateInit (&strm
);
5349 while (strm
.avail_in
> 0)
5352 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
5353 bfd_get_filename (abfd
), rc
);
5354 strm
.next_out
= ((Bytef
*) uncompressed_buffer
5355 + (uncompressed_size
- strm
.avail_out
));
5356 rc
= inflate (&strm
, Z_FINISH
);
5357 if (rc
!= Z_STREAM_END
)
5358 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
5359 bfd_get_filename (abfd
), rc
);
5360 rc
= inflateReset (&strm
);
5362 rc
= inflateEnd (&strm
);
5364 || strm
.avail_out
!= 0)
5365 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
5366 bfd_get_filename (abfd
), rc
);
5368 xfree (compressed_buffer
);
5369 *outbuf
= uncompressed_buffer
;
5370 *outsize
= uncompressed_size
;
5375 /* Read the contents of the section at OFFSET and of size SIZE from the
5376 object file specified by OBJFILE into the objfile_obstack and return it.
5377 If the section is compressed, uncompress it before returning. */
5380 dwarf2_read_section (struct objfile
*objfile
, asection
*sectp
)
5382 bfd
*abfd
= objfile
->obfd
;
5383 gdb_byte
*buf
, *retbuf
;
5384 bfd_size_type size
= bfd_get_section_size (sectp
);
5385 unsigned char header
[4];
5390 /* Check if the file has a 4-byte header indicating compression. */
5391 if (size
> sizeof (header
)
5392 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
5393 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
5395 /* Upon decompression, update the buffer and its size. */
5396 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
5398 zlib_decompress_section (objfile
, sectp
, &buf
, &size
);
5399 dwarf2_resize_section (sectp
, size
);
5404 /* If we get here, we are a normal, not-compressed section. */
5405 buf
= obstack_alloc (&objfile
->objfile_obstack
, size
);
5406 /* When debugging .o files, we may need to apply relocations; see
5407 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
5408 We never compress sections in .o files, so we only need to
5409 try this when the section is not compressed. */
5410 retbuf
= symfile_relocate_debug_section (abfd
, sectp
, buf
);
5414 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
5415 || bfd_bread (buf
, size
, abfd
) != size
)
5416 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5417 bfd_get_filename (abfd
));
5422 /* In DWARF version 2, the description of the debugging information is
5423 stored in a separate .debug_abbrev section. Before we read any
5424 dies from a section we read in all abbreviations and install them
5425 in a hash table. This function also sets flags in CU describing
5426 the data found in the abbrev table. */
5429 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
5431 struct comp_unit_head
*cu_header
= &cu
->header
;
5432 gdb_byte
*abbrev_ptr
;
5433 struct abbrev_info
*cur_abbrev
;
5434 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
5435 unsigned int abbrev_form
, hash_number
;
5436 struct attr_abbrev
*cur_attrs
;
5437 unsigned int allocated_attrs
;
5439 /* Initialize dwarf2 abbrevs */
5440 obstack_init (&cu
->abbrev_obstack
);
5441 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
5443 * sizeof (struct abbrev_info
*)));
5444 memset (cu
->dwarf2_abbrevs
, 0,
5445 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
5447 abbrev_ptr
= dwarf2_per_objfile
->abbrev_buffer
+ cu_header
->abbrev_offset
;
5448 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5449 abbrev_ptr
+= bytes_read
;
5451 allocated_attrs
= ATTR_ALLOC_CHUNK
;
5452 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
5454 /* loop until we reach an abbrev number of 0 */
5455 while (abbrev_number
)
5457 cur_abbrev
= dwarf_alloc_abbrev (cu
);
5459 /* read in abbrev header */
5460 cur_abbrev
->number
= abbrev_number
;
5461 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5462 abbrev_ptr
+= bytes_read
;
5463 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
5466 if (cur_abbrev
->tag
== DW_TAG_namespace
)
5467 cu
->has_namespace_info
= 1;
5469 /* now read in declarations */
5470 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5471 abbrev_ptr
+= bytes_read
;
5472 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5473 abbrev_ptr
+= bytes_read
;
5476 if (cur_abbrev
->num_attrs
== allocated_attrs
)
5478 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
5480 = xrealloc (cur_attrs
, (allocated_attrs
5481 * sizeof (struct attr_abbrev
)));
5484 /* Record whether this compilation unit might have
5485 inter-compilation-unit references. If we don't know what form
5486 this attribute will have, then it might potentially be a
5487 DW_FORM_ref_addr, so we conservatively expect inter-CU
5490 if (abbrev_form
== DW_FORM_ref_addr
5491 || abbrev_form
== DW_FORM_indirect
)
5492 cu
->has_form_ref_addr
= 1;
5494 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
5495 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
5496 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5497 abbrev_ptr
+= bytes_read
;
5498 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5499 abbrev_ptr
+= bytes_read
;
5502 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
5503 (cur_abbrev
->num_attrs
5504 * sizeof (struct attr_abbrev
)));
5505 memcpy (cur_abbrev
->attrs
, cur_attrs
,
5506 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
5508 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
5509 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
5510 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
5512 /* Get next abbreviation.
5513 Under Irix6 the abbreviations for a compilation unit are not
5514 always properly terminated with an abbrev number of 0.
5515 Exit loop if we encounter an abbreviation which we have
5516 already read (which means we are about to read the abbreviations
5517 for the next compile unit) or if the end of the abbreviation
5518 table is reached. */
5519 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev_buffer
)
5520 >= dwarf2_per_objfile
->abbrev_size
)
5522 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5523 abbrev_ptr
+= bytes_read
;
5524 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
5531 /* Release the memory used by the abbrev table for a compilation unit. */
5534 dwarf2_free_abbrev_table (void *ptr_to_cu
)
5536 struct dwarf2_cu
*cu
= ptr_to_cu
;
5538 obstack_free (&cu
->abbrev_obstack
, NULL
);
5539 cu
->dwarf2_abbrevs
= NULL
;
5542 /* Lookup an abbrev_info structure in the abbrev hash table. */
5544 static struct abbrev_info
*
5545 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
5547 unsigned int hash_number
;
5548 struct abbrev_info
*abbrev
;
5550 hash_number
= number
% ABBREV_HASH_SIZE
;
5551 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
5555 if (abbrev
->number
== number
)
5558 abbrev
= abbrev
->next
;
5563 /* Returns nonzero if TAG represents a type that we might generate a partial
5567 is_type_tag_for_partial (int tag
)
5572 /* Some types that would be reasonable to generate partial symbols for,
5573 that we don't at present. */
5574 case DW_TAG_array_type
:
5575 case DW_TAG_file_type
:
5576 case DW_TAG_ptr_to_member_type
:
5577 case DW_TAG_set_type
:
5578 case DW_TAG_string_type
:
5579 case DW_TAG_subroutine_type
:
5581 case DW_TAG_base_type
:
5582 case DW_TAG_class_type
:
5583 case DW_TAG_interface_type
:
5584 case DW_TAG_enumeration_type
:
5585 case DW_TAG_structure_type
:
5586 case DW_TAG_subrange_type
:
5587 case DW_TAG_typedef
:
5588 case DW_TAG_union_type
:
5595 /* Load all DIEs that are interesting for partial symbols into memory. */
5597 static struct partial_die_info
*
5598 load_partial_dies (bfd
*abfd
, gdb_byte
*info_ptr
, int building_psymtab
,
5599 struct dwarf2_cu
*cu
)
5601 struct partial_die_info
*part_die
;
5602 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
5603 struct abbrev_info
*abbrev
;
5604 unsigned int bytes_read
;
5605 unsigned int load_all
= 0;
5607 int nesting_level
= 1;
5612 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
5616 = htab_create_alloc_ex (cu
->header
.length
/ 12,
5620 &cu
->comp_unit_obstack
,
5621 hashtab_obstack_allocate
,
5622 dummy_obstack_deallocate
);
5624 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5625 sizeof (struct partial_die_info
));
5629 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
5631 /* A NULL abbrev means the end of a series of children. */
5634 if (--nesting_level
== 0)
5636 /* PART_DIE was probably the last thing allocated on the
5637 comp_unit_obstack, so we could call obstack_free
5638 here. We don't do that because the waste is small,
5639 and will be cleaned up when we're done with this
5640 compilation unit. This way, we're also more robust
5641 against other users of the comp_unit_obstack. */
5644 info_ptr
+= bytes_read
;
5645 last_die
= parent_die
;
5646 parent_die
= parent_die
->die_parent
;
5650 /* Check whether this DIE is interesting enough to save. Normally
5651 we would not be interested in members here, but there may be
5652 later variables referencing them via DW_AT_specification (for
5655 && !is_type_tag_for_partial (abbrev
->tag
)
5656 && abbrev
->tag
!= DW_TAG_enumerator
5657 && abbrev
->tag
!= DW_TAG_subprogram
5658 && abbrev
->tag
!= DW_TAG_variable
5659 && abbrev
->tag
!= DW_TAG_namespace
5660 && abbrev
->tag
!= DW_TAG_member
)
5662 /* Otherwise we skip to the next sibling, if any. */
5663 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
5667 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
,
5668 abfd
, info_ptr
, cu
);
5670 /* This two-pass algorithm for processing partial symbols has a
5671 high cost in cache pressure. Thus, handle some simple cases
5672 here which cover the majority of C partial symbols. DIEs
5673 which neither have specification tags in them, nor could have
5674 specification tags elsewhere pointing at them, can simply be
5675 processed and discarded.
5677 This segment is also optional; scan_partial_symbols and
5678 add_partial_symbol will handle these DIEs if we chain
5679 them in normally. When compilers which do not emit large
5680 quantities of duplicate debug information are more common,
5681 this code can probably be removed. */
5683 /* Any complete simple types at the top level (pretty much all
5684 of them, for a language without namespaces), can be processed
5686 if (parent_die
== NULL
5687 && part_die
->has_specification
== 0
5688 && part_die
->is_declaration
== 0
5689 && (part_die
->tag
== DW_TAG_typedef
5690 || part_die
->tag
== DW_TAG_base_type
5691 || part_die
->tag
== DW_TAG_subrange_type
))
5693 if (building_psymtab
&& part_die
->name
!= NULL
)
5694 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5695 VAR_DOMAIN
, LOC_TYPEDEF
,
5696 &cu
->objfile
->static_psymbols
,
5697 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5698 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5702 /* If we're at the second level, and we're an enumerator, and
5703 our parent has no specification (meaning possibly lives in a
5704 namespace elsewhere), then we can add the partial symbol now
5705 instead of queueing it. */
5706 if (part_die
->tag
== DW_TAG_enumerator
5707 && parent_die
!= NULL
5708 && parent_die
->die_parent
== NULL
5709 && parent_die
->tag
== DW_TAG_enumeration_type
5710 && parent_die
->has_specification
== 0)
5712 if (part_die
->name
== NULL
)
5713 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
5714 else if (building_psymtab
)
5715 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5716 VAR_DOMAIN
, LOC_CONST
,
5717 (cu
->language
== language_cplus
5718 || cu
->language
== language_java
)
5719 ? &cu
->objfile
->global_psymbols
5720 : &cu
->objfile
->static_psymbols
,
5721 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5723 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5727 /* We'll save this DIE so link it in. */
5728 part_die
->die_parent
= parent_die
;
5729 part_die
->die_sibling
= NULL
;
5730 part_die
->die_child
= NULL
;
5732 if (last_die
&& last_die
== parent_die
)
5733 last_die
->die_child
= part_die
;
5735 last_die
->die_sibling
= part_die
;
5737 last_die
= part_die
;
5739 if (first_die
== NULL
)
5740 first_die
= part_die
;
5742 /* Maybe add the DIE to the hash table. Not all DIEs that we
5743 find interesting need to be in the hash table, because we
5744 also have the parent/sibling/child chains; only those that we
5745 might refer to by offset later during partial symbol reading.
5747 For now this means things that might have be the target of a
5748 DW_AT_specification, DW_AT_abstract_origin, or
5749 DW_AT_extension. DW_AT_extension will refer only to
5750 namespaces; DW_AT_abstract_origin refers to functions (and
5751 many things under the function DIE, but we do not recurse
5752 into function DIEs during partial symbol reading) and
5753 possibly variables as well; DW_AT_specification refers to
5754 declarations. Declarations ought to have the DW_AT_declaration
5755 flag. It happens that GCC forgets to put it in sometimes, but
5756 only for functions, not for types.
5758 Adding more things than necessary to the hash table is harmless
5759 except for the performance cost. Adding too few will result in
5760 wasted time in find_partial_die, when we reread the compilation
5761 unit with load_all_dies set. */
5764 || abbrev
->tag
== DW_TAG_subprogram
5765 || abbrev
->tag
== DW_TAG_variable
5766 || abbrev
->tag
== DW_TAG_namespace
5767 || part_die
->is_declaration
)
5771 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
5772 part_die
->offset
, INSERT
);
5776 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5777 sizeof (struct partial_die_info
));
5779 /* For some DIEs we want to follow their children (if any). For C
5780 we have no reason to follow the children of structures; for other
5781 languages we have to, both so that we can get at method physnames
5782 to infer fully qualified class names, and for DW_AT_specification. */
5783 if (last_die
->has_children
5785 || last_die
->tag
== DW_TAG_namespace
5786 || last_die
->tag
== DW_TAG_enumeration_type
5787 || (cu
->language
!= language_c
5788 && (last_die
->tag
== DW_TAG_class_type
5789 || last_die
->tag
== DW_TAG_interface_type
5790 || last_die
->tag
== DW_TAG_structure_type
5791 || last_die
->tag
== DW_TAG_union_type
))))
5794 parent_die
= last_die
;
5798 /* Otherwise we skip to the next sibling, if any. */
5799 info_ptr
= locate_pdi_sibling (last_die
, info_ptr
, abfd
, cu
);
5801 /* Back to the top, do it again. */
5805 /* Read a minimal amount of information into the minimal die structure. */
5808 read_partial_die (struct partial_die_info
*part_die
,
5809 struct abbrev_info
*abbrev
,
5810 unsigned int abbrev_len
, bfd
*abfd
,
5811 gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
5813 unsigned int bytes_read
, i
;
5814 struct attribute attr
;
5815 int has_low_pc_attr
= 0;
5816 int has_high_pc_attr
= 0;
5818 memset (part_die
, 0, sizeof (struct partial_die_info
));
5820 part_die
->offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5822 info_ptr
+= abbrev_len
;
5827 part_die
->tag
= abbrev
->tag
;
5828 part_die
->has_children
= abbrev
->has_children
;
5830 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5832 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
5834 /* Store the data if it is of an attribute we want to keep in a
5835 partial symbol table. */
5840 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
5841 if (part_die
->name
== NULL
)
5842 part_die
->name
= DW_STRING (&attr
);
5844 case DW_AT_comp_dir
:
5845 if (part_die
->dirname
== NULL
)
5846 part_die
->dirname
= DW_STRING (&attr
);
5848 case DW_AT_MIPS_linkage_name
:
5849 part_die
->name
= DW_STRING (&attr
);
5852 has_low_pc_attr
= 1;
5853 part_die
->lowpc
= DW_ADDR (&attr
);
5856 has_high_pc_attr
= 1;
5857 part_die
->highpc
= DW_ADDR (&attr
);
5860 if (dwarf2_ranges_read (DW_UNSND (&attr
), &part_die
->lowpc
,
5861 &part_die
->highpc
, cu
))
5862 has_low_pc_attr
= has_high_pc_attr
= 1;
5864 case DW_AT_location
:
5865 /* Support the .debug_loc offsets */
5866 if (attr_form_is_block (&attr
))
5868 part_die
->locdesc
= DW_BLOCK (&attr
);
5870 else if (attr_form_is_section_offset (&attr
))
5872 dwarf2_complex_location_expr_complaint ();
5876 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5877 "partial symbol information");
5880 case DW_AT_language
:
5881 part_die
->language
= DW_UNSND (&attr
);
5883 case DW_AT_external
:
5884 part_die
->is_external
= DW_UNSND (&attr
);
5886 case DW_AT_declaration
:
5887 part_die
->is_declaration
= DW_UNSND (&attr
);
5890 part_die
->has_type
= 1;
5892 case DW_AT_abstract_origin
:
5893 case DW_AT_specification
:
5894 case DW_AT_extension
:
5895 part_die
->has_specification
= 1;
5896 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
, cu
);
5899 /* Ignore absolute siblings, they might point outside of
5900 the current compile unit. */
5901 if (attr
.form
== DW_FORM_ref_addr
)
5902 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
5904 part_die
->sibling
= dwarf2_per_objfile
->info_buffer
5905 + dwarf2_get_ref_die_offset (&attr
, cu
);
5907 case DW_AT_stmt_list
:
5908 part_die
->has_stmt_list
= 1;
5909 part_die
->line_offset
= DW_UNSND (&attr
);
5911 case DW_AT_byte_size
:
5912 part_die
->has_byte_size
= 1;
5914 case DW_AT_calling_convention
:
5915 /* DWARF doesn't provide a way to identify a program's source-level
5916 entry point. DW_AT_calling_convention attributes are only meant
5917 to describe functions' calling conventions.
5919 However, because it's a necessary piece of information in
5920 Fortran, and because DW_CC_program is the only piece of debugging
5921 information whose definition refers to a 'main program' at all,
5922 several compilers have begun marking Fortran main programs with
5923 DW_CC_program --- even when those functions use the standard
5924 calling conventions.
5926 So until DWARF specifies a way to provide this information and
5927 compilers pick up the new representation, we'll support this
5929 if (DW_UNSND (&attr
) == DW_CC_program
5930 && cu
->language
== language_fortran
)
5931 set_main_name (part_die
->name
);
5938 /* When using the GNU linker, .gnu.linkonce. sections are used to
5939 eliminate duplicate copies of functions and vtables and such.
5940 The linker will arbitrarily choose one and discard the others.
5941 The AT_*_pc values for such functions refer to local labels in
5942 these sections. If the section from that file was discarded, the
5943 labels are not in the output, so the relocs get a value of 0.
5944 If this is a discarded function, mark the pc bounds as invalid,
5945 so that GDB will ignore it. */
5946 if (has_low_pc_attr
&& has_high_pc_attr
5947 && part_die
->lowpc
< part_die
->highpc
5948 && (part_die
->lowpc
!= 0
5949 || dwarf2_per_objfile
->has_section_at_zero
))
5950 part_die
->has_pc_info
= 1;
5954 /* Find a cached partial DIE at OFFSET in CU. */
5956 static struct partial_die_info
*
5957 find_partial_die_in_comp_unit (unsigned long offset
, struct dwarf2_cu
*cu
)
5959 struct partial_die_info
*lookup_die
= NULL
;
5960 struct partial_die_info part_die
;
5962 part_die
.offset
= offset
;
5963 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
5968 /* Find a partial DIE at OFFSET, which may or may not be in CU. */
5970 static struct partial_die_info
*
5971 find_partial_die (unsigned long offset
, struct dwarf2_cu
*cu
)
5973 struct dwarf2_per_cu_data
*per_cu
= NULL
;
5974 struct partial_die_info
*pd
= NULL
;
5976 if (offset
>= cu
->header
.offset
5977 && offset
< cu
->header
.offset
+ cu
->header
.length
)
5979 pd
= find_partial_die_in_comp_unit (offset
, cu
);
5984 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
5986 if (per_cu
->cu
== NULL
)
5988 load_comp_unit (per_cu
, cu
->objfile
);
5989 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5990 dwarf2_per_objfile
->read_in_chain
= per_cu
;
5993 per_cu
->cu
->last_used
= 0;
5994 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5996 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
5998 struct cleanup
*back_to
;
5999 struct partial_die_info comp_unit_die
;
6000 struct abbrev_info
*abbrev
;
6001 unsigned int bytes_read
;
6004 per_cu
->load_all_dies
= 1;
6006 /* Re-read the DIEs. */
6007 back_to
= make_cleanup (null_cleanup
, 0);
6008 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
6010 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
6011 back_to
= make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
6013 info_ptr
= per_cu
->cu
->header
.first_die_ptr
;
6014 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
6015 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
6016 per_cu
->cu
->objfile
->obfd
, info_ptr
,
6018 if (comp_unit_die
.has_children
)
6019 load_partial_dies (per_cu
->cu
->objfile
->obfd
, info_ptr
, 0, per_cu
->cu
);
6020 do_cleanups (back_to
);
6022 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6026 internal_error (__FILE__
, __LINE__
,
6027 _("could not find partial DIE 0x%lx in cache [from module %s]\n"),
6028 offset
, bfd_get_filename (cu
->objfile
->obfd
));
6032 /* Adjust PART_DIE before generating a symbol for it. This function
6033 may set the is_external flag or change the DIE's name. */
6036 fixup_partial_die (struct partial_die_info
*part_die
,
6037 struct dwarf2_cu
*cu
)
6039 /* If we found a reference attribute and the DIE has no name, try
6040 to find a name in the referred to DIE. */
6042 if (part_die
->name
== NULL
&& part_die
->has_specification
)
6044 struct partial_die_info
*spec_die
;
6046 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
6048 fixup_partial_die (spec_die
, cu
);
6052 part_die
->name
= spec_die
->name
;
6054 /* Copy DW_AT_external attribute if it is set. */
6055 if (spec_die
->is_external
)
6056 part_die
->is_external
= spec_die
->is_external
;
6060 /* Set default names for some unnamed DIEs. */
6061 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
6062 || part_die
->tag
== DW_TAG_class_type
))
6063 part_die
->name
= "(anonymous class)";
6065 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
6066 part_die
->name
= "(anonymous namespace)";
6068 if (part_die
->tag
== DW_TAG_structure_type
6069 || part_die
->tag
== DW_TAG_class_type
6070 || part_die
->tag
== DW_TAG_union_type
)
6071 guess_structure_name (part_die
, cu
);
6074 /* Read the die from the .debug_info section buffer. Set DIEP to
6075 point to a newly allocated die with its information, except for its
6076 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6077 whether the die has children or not. */
6080 read_full_die (struct die_info
**diep
, bfd
*abfd
, gdb_byte
*info_ptr
,
6081 struct dwarf2_cu
*cu
, int *has_children
)
6083 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6084 struct abbrev_info
*abbrev
;
6085 struct die_info
*die
;
6087 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
6088 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6089 info_ptr
+= bytes_read
;
6092 die
= dwarf_alloc_die ();
6094 die
->abbrev
= abbrev_number
;
6101 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6104 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6106 bfd_get_filename (abfd
));
6108 die
= dwarf_alloc_die ();
6109 die
->offset
= offset
;
6110 die
->tag
= abbrev
->tag
;
6111 die
->abbrev
= abbrev_number
;
6114 die
->num_attrs
= abbrev
->num_attrs
;
6115 die
->attrs
= (struct attribute
*)
6116 xmalloc (die
->num_attrs
* sizeof (struct attribute
));
6118 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6120 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6121 abfd
, info_ptr
, cu
);
6123 /* If this attribute is an absolute reference to a different
6124 compilation unit, make sure that compilation unit is loaded
6126 if (die
->attrs
[i
].form
== DW_FORM_ref_addr
6127 && (DW_ADDR (&die
->attrs
[i
]) < cu
->header
.offset
6128 || (DW_ADDR (&die
->attrs
[i
])
6129 >= cu
->header
.offset
+ cu
->header
.length
)))
6131 struct dwarf2_per_cu_data
*per_cu
;
6132 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (&die
->attrs
[i
]),
6135 /* Mark the dependence relation so that we don't flush PER_CU
6137 dwarf2_add_dependence (cu
, per_cu
);
6139 /* If it's already on the queue, we have nothing to do. */
6143 /* If the compilation unit is already loaded, just mark it as
6145 if (per_cu
->cu
!= NULL
)
6147 per_cu
->cu
->last_used
= 0;
6151 /* Add it to the queue. */
6152 queue_comp_unit (per_cu
);
6157 *has_children
= abbrev
->has_children
;
6161 /* Read an attribute value described by an attribute form. */
6164 read_attribute_value (struct attribute
*attr
, unsigned form
,
6165 bfd
*abfd
, gdb_byte
*info_ptr
,
6166 struct dwarf2_cu
*cu
)
6168 struct comp_unit_head
*cu_header
= &cu
->header
;
6169 unsigned int bytes_read
;
6170 struct dwarf_block
*blk
;
6176 case DW_FORM_ref_addr
:
6177 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
6178 info_ptr
+= bytes_read
;
6180 case DW_FORM_block2
:
6181 blk
= dwarf_alloc_block (cu
);
6182 blk
->size
= read_2_bytes (abfd
, info_ptr
);
6184 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6185 info_ptr
+= blk
->size
;
6186 DW_BLOCK (attr
) = blk
;
6188 case DW_FORM_block4
:
6189 blk
= dwarf_alloc_block (cu
);
6190 blk
->size
= read_4_bytes (abfd
, info_ptr
);
6192 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6193 info_ptr
+= blk
->size
;
6194 DW_BLOCK (attr
) = blk
;
6197 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
6201 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
6205 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
6208 case DW_FORM_string
:
6209 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
6210 info_ptr
+= bytes_read
;
6213 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
6215 info_ptr
+= bytes_read
;
6218 blk
= dwarf_alloc_block (cu
);
6219 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6220 info_ptr
+= bytes_read
;
6221 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6222 info_ptr
+= blk
->size
;
6223 DW_BLOCK (attr
) = blk
;
6225 case DW_FORM_block1
:
6226 blk
= dwarf_alloc_block (cu
);
6227 blk
->size
= read_1_byte (abfd
, info_ptr
);
6229 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6230 info_ptr
+= blk
->size
;
6231 DW_BLOCK (attr
) = blk
;
6234 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
6238 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
6242 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
6243 info_ptr
+= bytes_read
;
6246 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6247 info_ptr
+= bytes_read
;
6250 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
6254 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
6258 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
6262 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
6265 case DW_FORM_ref_udata
:
6266 DW_ADDR (attr
) = (cu
->header
.offset
6267 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
6268 info_ptr
+= bytes_read
;
6270 case DW_FORM_indirect
:
6271 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6272 info_ptr
+= bytes_read
;
6273 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
6276 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
6277 dwarf_form_name (form
),
6278 bfd_get_filename (abfd
));
6283 /* Read an attribute described by an abbreviated attribute. */
6286 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
6287 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6289 attr
->name
= abbrev
->name
;
6290 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
6293 /* read dwarf information from a buffer */
6296 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
6298 return bfd_get_8 (abfd
, buf
);
6302 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
6304 return bfd_get_signed_8 (abfd
, buf
);
6308 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
6310 return bfd_get_16 (abfd
, buf
);
6314 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6316 return bfd_get_signed_16 (abfd
, buf
);
6320 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
6322 return bfd_get_32 (abfd
, buf
);
6326 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6328 return bfd_get_signed_32 (abfd
, buf
);
6331 static unsigned long
6332 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
6334 return bfd_get_64 (abfd
, buf
);
6338 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
6339 unsigned int *bytes_read
)
6341 struct comp_unit_head
*cu_header
= &cu
->header
;
6342 CORE_ADDR retval
= 0;
6344 if (cu_header
->signed_addr_p
)
6346 switch (cu_header
->addr_size
)
6349 retval
= bfd_get_signed_16 (abfd
, buf
);
6352 retval
= bfd_get_signed_32 (abfd
, buf
);
6355 retval
= bfd_get_signed_64 (abfd
, buf
);
6358 internal_error (__FILE__
, __LINE__
,
6359 _("read_address: bad switch, signed [in module %s]"),
6360 bfd_get_filename (abfd
));
6365 switch (cu_header
->addr_size
)
6368 retval
= bfd_get_16 (abfd
, buf
);
6371 retval
= bfd_get_32 (abfd
, buf
);
6374 retval
= bfd_get_64 (abfd
, buf
);
6377 internal_error (__FILE__
, __LINE__
,
6378 _("read_address: bad switch, unsigned [in module %s]"),
6379 bfd_get_filename (abfd
));
6383 *bytes_read
= cu_header
->addr_size
;
6387 /* Read the initial length from a section. The (draft) DWARF 3
6388 specification allows the initial length to take up either 4 bytes
6389 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
6390 bytes describe the length and all offsets will be 8 bytes in length
6393 An older, non-standard 64-bit format is also handled by this
6394 function. The older format in question stores the initial length
6395 as an 8-byte quantity without an escape value. Lengths greater
6396 than 2^32 aren't very common which means that the initial 4 bytes
6397 is almost always zero. Since a length value of zero doesn't make
6398 sense for the 32-bit format, this initial zero can be considered to
6399 be an escape value which indicates the presence of the older 64-bit
6400 format. As written, the code can't detect (old format) lengths
6401 greater than 4GB. If it becomes necessary to handle lengths
6402 somewhat larger than 4GB, we could allow other small values (such
6403 as the non-sensical values of 1, 2, and 3) to also be used as
6404 escape values indicating the presence of the old format.
6406 The value returned via bytes_read should be used to increment the
6407 relevant pointer after calling read_initial_length().
6409 As a side effect, this function sets the fields initial_length_size
6410 and offset_size in cu_header to the values appropriate for the
6411 length field. (The format of the initial length field determines
6412 the width of file offsets to be fetched later with read_offset().)
6414 [ Note: read_initial_length() and read_offset() are based on the
6415 document entitled "DWARF Debugging Information Format", revision
6416 3, draft 8, dated November 19, 2001. This document was obtained
6419 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
6421 This document is only a draft and is subject to change. (So beware.)
6423 Details regarding the older, non-standard 64-bit format were
6424 determined empirically by examining 64-bit ELF files produced by
6425 the SGI toolchain on an IRIX 6.5 machine.
6427 - Kevin, July 16, 2002
6431 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, struct comp_unit_head
*cu_header
,
6432 unsigned int *bytes_read
)
6434 LONGEST length
= bfd_get_32 (abfd
, buf
);
6436 if (length
== 0xffffffff)
6438 length
= bfd_get_64 (abfd
, buf
+ 4);
6441 else if (length
== 0)
6443 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
6444 length
= bfd_get_64 (abfd
, buf
);
6454 gdb_assert (cu_header
->initial_length_size
== 0
6455 || cu_header
->initial_length_size
== 4
6456 || cu_header
->initial_length_size
== 8
6457 || cu_header
->initial_length_size
== 12);
6459 if (cu_header
->initial_length_size
!= 0
6460 && cu_header
->initial_length_size
!= *bytes_read
)
6461 complaint (&symfile_complaints
,
6462 _("intermixed 32-bit and 64-bit DWARF sections"));
6464 cu_header
->initial_length_size
= *bytes_read
;
6465 cu_header
->offset_size
= (*bytes_read
== 4) ? 4 : 8;
6471 /* Read an offset from the data stream. The size of the offset is
6472 given by cu_header->offset_size. */
6475 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
6476 unsigned int *bytes_read
)
6480 switch (cu_header
->offset_size
)
6483 retval
= bfd_get_32 (abfd
, buf
);
6487 retval
= bfd_get_64 (abfd
, buf
);
6491 internal_error (__FILE__
, __LINE__
,
6492 _("read_offset: bad switch [in module %s]"),
6493 bfd_get_filename (abfd
));
6500 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
6502 /* If the size of a host char is 8 bits, we can return a pointer
6503 to the buffer, otherwise we have to copy the data to a buffer
6504 allocated on the temporary obstack. */
6505 gdb_assert (HOST_CHAR_BIT
== 8);
6510 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6512 /* If the size of a host char is 8 bits, we can return a pointer
6513 to the string, otherwise we have to copy the string to a buffer
6514 allocated on the temporary obstack. */
6515 gdb_assert (HOST_CHAR_BIT
== 8);
6518 *bytes_read_ptr
= 1;
6521 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
6522 return (char *) buf
;
6526 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
6527 const struct comp_unit_head
*cu_header
,
6528 unsigned int *bytes_read_ptr
)
6530 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
,
6533 if (dwarf2_per_objfile
->str_buffer
== NULL
)
6535 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
6536 bfd_get_filename (abfd
));
6539 if (str_offset
>= dwarf2_per_objfile
->str_size
)
6541 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
6542 bfd_get_filename (abfd
));
6545 gdb_assert (HOST_CHAR_BIT
== 8);
6546 if (dwarf2_per_objfile
->str_buffer
[str_offset
] == '\0')
6548 return (char *) (dwarf2_per_objfile
->str_buffer
+ str_offset
);
6551 static unsigned long
6552 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6554 unsigned long result
;
6555 unsigned int num_read
;
6565 byte
= bfd_get_8 (abfd
, buf
);
6568 result
|= ((unsigned long)(byte
& 127) << shift
);
6569 if ((byte
& 128) == 0)
6575 *bytes_read_ptr
= num_read
;
6580 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6583 int i
, shift
, num_read
;
6592 byte
= bfd_get_8 (abfd
, buf
);
6595 result
|= ((long)(byte
& 127) << shift
);
6597 if ((byte
& 128) == 0)
6602 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
6603 result
|= -(((long)1) << shift
);
6604 *bytes_read_ptr
= num_read
;
6608 /* Return a pointer to just past the end of an LEB128 number in BUF. */
6611 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
6617 byte
= bfd_get_8 (abfd
, buf
);
6619 if ((byte
& 128) == 0)
6625 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
6631 cu
->language
= language_c
;
6633 case DW_LANG_C_plus_plus
:
6634 cu
->language
= language_cplus
;
6636 case DW_LANG_Fortran77
:
6637 case DW_LANG_Fortran90
:
6638 case DW_LANG_Fortran95
:
6639 cu
->language
= language_fortran
;
6641 case DW_LANG_Mips_Assembler
:
6642 cu
->language
= language_asm
;
6645 cu
->language
= language_java
;
6649 cu
->language
= language_ada
;
6651 case DW_LANG_Modula2
:
6652 cu
->language
= language_m2
;
6654 case DW_LANG_Pascal83
:
6655 cu
->language
= language_pascal
;
6658 cu
->language
= language_objc
;
6660 case DW_LANG_Cobol74
:
6661 case DW_LANG_Cobol85
:
6663 cu
->language
= language_minimal
;
6666 cu
->language_defn
= language_def (cu
->language
);
6669 /* Return the named attribute or NULL if not there. */
6671 static struct attribute
*
6672 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
6675 struct attribute
*spec
= NULL
;
6677 for (i
= 0; i
< die
->num_attrs
; ++i
)
6679 if (die
->attrs
[i
].name
== name
)
6680 return &die
->attrs
[i
];
6681 if (die
->attrs
[i
].name
== DW_AT_specification
6682 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
6683 spec
= &die
->attrs
[i
];
6687 return dwarf2_attr (follow_die_ref (die
, spec
, cu
), name
, cu
);
6692 /* Return non-zero iff the attribute NAME is defined for the given DIE,
6693 and holds a non-zero value. This function should only be used for
6694 DW_FORM_flag attributes. */
6697 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
6699 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
6701 return (attr
&& DW_UNSND (attr
));
6705 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
6707 /* A DIE is a declaration if it has a DW_AT_declaration attribute
6708 which value is non-zero. However, we have to be careful with
6709 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
6710 (via dwarf2_flag_true_p) follows this attribute. So we may
6711 end up accidently finding a declaration attribute that belongs
6712 to a different DIE referenced by the specification attribute,
6713 even though the given DIE does not have a declaration attribute. */
6714 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
6715 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
6718 /* Return the die giving the specification for DIE, if there is
6721 static struct die_info
*
6722 die_specification (struct die_info
*die
, struct dwarf2_cu
*cu
)
6724 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
, cu
);
6726 if (spec_attr
== NULL
)
6729 return follow_die_ref (die
, spec_attr
, cu
);
6732 /* Free the line_header structure *LH, and any arrays and strings it
6735 free_line_header (struct line_header
*lh
)
6737 if (lh
->standard_opcode_lengths
)
6738 xfree (lh
->standard_opcode_lengths
);
6740 /* Remember that all the lh->file_names[i].name pointers are
6741 pointers into debug_line_buffer, and don't need to be freed. */
6743 xfree (lh
->file_names
);
6745 /* Similarly for the include directory names. */
6746 if (lh
->include_dirs
)
6747 xfree (lh
->include_dirs
);
6753 /* Add an entry to LH's include directory table. */
6755 add_include_dir (struct line_header
*lh
, char *include_dir
)
6757 /* Grow the array if necessary. */
6758 if (lh
->include_dirs_size
== 0)
6760 lh
->include_dirs_size
= 1; /* for testing */
6761 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
6762 * sizeof (*lh
->include_dirs
));
6764 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
6766 lh
->include_dirs_size
*= 2;
6767 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
6768 (lh
->include_dirs_size
6769 * sizeof (*lh
->include_dirs
)));
6772 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
6776 /* Add an entry to LH's file name table. */
6778 add_file_name (struct line_header
*lh
,
6780 unsigned int dir_index
,
6781 unsigned int mod_time
,
6782 unsigned int length
)
6784 struct file_entry
*fe
;
6786 /* Grow the array if necessary. */
6787 if (lh
->file_names_size
== 0)
6789 lh
->file_names_size
= 1; /* for testing */
6790 lh
->file_names
= xmalloc (lh
->file_names_size
6791 * sizeof (*lh
->file_names
));
6793 else if (lh
->num_file_names
>= lh
->file_names_size
)
6795 lh
->file_names_size
*= 2;
6796 lh
->file_names
= xrealloc (lh
->file_names
,
6797 (lh
->file_names_size
6798 * sizeof (*lh
->file_names
)));
6801 fe
= &lh
->file_names
[lh
->num_file_names
++];
6803 fe
->dir_index
= dir_index
;
6804 fe
->mod_time
= mod_time
;
6805 fe
->length
= length
;
6811 /* Read the statement program header starting at OFFSET in
6812 .debug_line, according to the endianness of ABFD. Return a pointer
6813 to a struct line_header, allocated using xmalloc.
6815 NOTE: the strings in the include directory and file name tables of
6816 the returned object point into debug_line_buffer, and must not be
6818 static struct line_header
*
6819 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
6820 struct dwarf2_cu
*cu
)
6822 struct cleanup
*back_to
;
6823 struct line_header
*lh
;
6825 unsigned int bytes_read
;
6827 char *cur_dir
, *cur_file
;
6829 if (dwarf2_per_objfile
->line_buffer
== NULL
)
6831 complaint (&symfile_complaints
, _("missing .debug_line section"));
6835 /* Make sure that at least there's room for the total_length field.
6836 That could be 12 bytes long, but we're just going to fudge that. */
6837 if (offset
+ 4 >= dwarf2_per_objfile
->line_size
)
6839 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6843 lh
= xmalloc (sizeof (*lh
));
6844 memset (lh
, 0, sizeof (*lh
));
6845 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
6848 line_ptr
= dwarf2_per_objfile
->line_buffer
+ offset
;
6850 /* Read in the header. */
6852 read_initial_length (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6853 line_ptr
+= bytes_read
;
6854 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line_buffer
6855 + dwarf2_per_objfile
->line_size
))
6857 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6860 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
6861 lh
->version
= read_2_bytes (abfd
, line_ptr
);
6863 lh
->header_length
= read_offset (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6864 line_ptr
+= bytes_read
;
6865 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
6867 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
6869 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
6871 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
6873 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
6875 lh
->standard_opcode_lengths
6876 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
6878 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
6879 for (i
= 1; i
< lh
->opcode_base
; ++i
)
6881 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
6885 /* Read directory table. */
6886 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6888 line_ptr
+= bytes_read
;
6889 add_include_dir (lh
, cur_dir
);
6891 line_ptr
+= bytes_read
;
6893 /* Read file name table. */
6894 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6896 unsigned int dir_index
, mod_time
, length
;
6898 line_ptr
+= bytes_read
;
6899 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6900 line_ptr
+= bytes_read
;
6901 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6902 line_ptr
+= bytes_read
;
6903 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6904 line_ptr
+= bytes_read
;
6906 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6908 line_ptr
+= bytes_read
;
6909 lh
->statement_program_start
= line_ptr
;
6911 if (line_ptr
> (dwarf2_per_objfile
->line_buffer
6912 + dwarf2_per_objfile
->line_size
))
6913 complaint (&symfile_complaints
,
6914 _("line number info header doesn't fit in `.debug_line' section"));
6916 discard_cleanups (back_to
);
6920 /* This function exists to work around a bug in certain compilers
6921 (particularly GCC 2.95), in which the first line number marker of a
6922 function does not show up until after the prologue, right before
6923 the second line number marker. This function shifts ADDRESS down
6924 to the beginning of the function if necessary, and is called on
6925 addresses passed to record_line. */
6928 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
6930 struct function_range
*fn
;
6932 /* Find the function_range containing address. */
6937 cu
->cached_fn
= cu
->first_fn
;
6941 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6947 while (fn
&& fn
!= cu
->cached_fn
)
6948 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6958 if (address
!= fn
->lowpc
)
6959 complaint (&symfile_complaints
,
6960 _("misplaced first line number at 0x%lx for '%s'"),
6961 (unsigned long) address
, fn
->name
);
6966 /* Decode the Line Number Program (LNP) for the given line_header
6967 structure and CU. The actual information extracted and the type
6968 of structures created from the LNP depends on the value of PST.
6970 1. If PST is NULL, then this procedure uses the data from the program
6971 to create all necessary symbol tables, and their linetables.
6972 The compilation directory of the file is passed in COMP_DIR,
6973 and must not be NULL.
6975 2. If PST is not NULL, this procedure reads the program to determine
6976 the list of files included by the unit represented by PST, and
6977 builds all the associated partial symbol tables. In this case,
6978 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
6979 is not used to compute the full name of the symtab, and therefore
6980 omitting it when building the partial symtab does not introduce
6981 the potential for inconsistency - a partial symtab and its associated
6982 symbtab having a different fullname -). */
6985 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
6986 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
6988 gdb_byte
*line_ptr
, *extended_end
;
6990 unsigned int bytes_read
, extended_len
;
6991 unsigned char op_code
, extended_op
, adj_opcode
;
6993 struct objfile
*objfile
= cu
->objfile
;
6994 const int decode_for_pst_p
= (pst
!= NULL
);
6995 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
6997 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6999 line_ptr
= lh
->statement_program_start
;
7000 line_end
= lh
->statement_program_end
;
7002 /* Read the statement sequences until there's nothing left. */
7003 while (line_ptr
< line_end
)
7005 /* state machine registers */
7006 CORE_ADDR address
= 0;
7007 unsigned int file
= 1;
7008 unsigned int line
= 1;
7009 unsigned int column
= 0;
7010 int is_stmt
= lh
->default_is_stmt
;
7011 int basic_block
= 0;
7012 int end_sequence
= 0;
7014 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
7016 /* Start a subfile for the current file of the state machine. */
7017 /* lh->include_dirs and lh->file_names are 0-based, but the
7018 directory and file name numbers in the statement program
7020 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
7024 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7026 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7029 /* Decode the table. */
7030 while (!end_sequence
)
7032 op_code
= read_1_byte (abfd
, line_ptr
);
7035 if (op_code
>= lh
->opcode_base
)
7037 /* Special operand. */
7038 adj_opcode
= op_code
- lh
->opcode_base
;
7039 address
+= (adj_opcode
/ lh
->line_range
)
7040 * lh
->minimum_instruction_length
;
7041 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
7042 if (lh
->num_file_names
< file
)
7043 dwarf2_debug_line_missing_file_complaint ();
7046 lh
->file_names
[file
- 1].included_p
= 1;
7047 if (!decode_for_pst_p
)
7049 if (last_subfile
!= current_subfile
)
7052 record_line (last_subfile
, 0, address
);
7053 last_subfile
= current_subfile
;
7055 /* Append row to matrix using current values. */
7056 record_line (current_subfile
, line
,
7057 check_cu_functions (address
, cu
));
7062 else switch (op_code
)
7064 case DW_LNS_extended_op
:
7065 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7066 line_ptr
+= bytes_read
;
7067 extended_end
= line_ptr
+ extended_len
;
7068 extended_op
= read_1_byte (abfd
, line_ptr
);
7070 switch (extended_op
)
7072 case DW_LNE_end_sequence
:
7075 if (lh
->num_file_names
< file
)
7076 dwarf2_debug_line_missing_file_complaint ();
7079 lh
->file_names
[file
- 1].included_p
= 1;
7080 if (!decode_for_pst_p
)
7081 record_line (current_subfile
, 0, address
);
7084 case DW_LNE_set_address
:
7085 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
7086 line_ptr
+= bytes_read
;
7087 address
+= baseaddr
;
7089 case DW_LNE_define_file
:
7092 unsigned int dir_index
, mod_time
, length
;
7094 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
7095 line_ptr
+= bytes_read
;
7097 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7098 line_ptr
+= bytes_read
;
7100 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7101 line_ptr
+= bytes_read
;
7103 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7104 line_ptr
+= bytes_read
;
7105 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7109 complaint (&symfile_complaints
,
7110 _("mangled .debug_line section"));
7113 /* Make sure that we parsed the extended op correctly. If e.g.
7114 we expected a different address size than the producer used,
7115 we may have read the wrong number of bytes. */
7116 if (line_ptr
!= extended_end
)
7118 complaint (&symfile_complaints
,
7119 _("mangled .debug_line section"));
7124 if (lh
->num_file_names
< file
)
7125 dwarf2_debug_line_missing_file_complaint ();
7128 lh
->file_names
[file
- 1].included_p
= 1;
7129 if (!decode_for_pst_p
)
7131 if (last_subfile
!= current_subfile
)
7134 record_line (last_subfile
, 0, address
);
7135 last_subfile
= current_subfile
;
7137 record_line (current_subfile
, line
,
7138 check_cu_functions (address
, cu
));
7143 case DW_LNS_advance_pc
:
7144 address
+= lh
->minimum_instruction_length
7145 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7146 line_ptr
+= bytes_read
;
7148 case DW_LNS_advance_line
:
7149 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
7150 line_ptr
+= bytes_read
;
7152 case DW_LNS_set_file
:
7154 /* The arrays lh->include_dirs and lh->file_names are
7155 0-based, but the directory and file name numbers in
7156 the statement program are 1-based. */
7157 struct file_entry
*fe
;
7160 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7161 line_ptr
+= bytes_read
;
7162 if (lh
->num_file_names
< file
)
7163 dwarf2_debug_line_missing_file_complaint ();
7166 fe
= &lh
->file_names
[file
- 1];
7168 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7169 if (!decode_for_pst_p
)
7171 last_subfile
= current_subfile
;
7172 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7177 case DW_LNS_set_column
:
7178 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7179 line_ptr
+= bytes_read
;
7181 case DW_LNS_negate_stmt
:
7182 is_stmt
= (!is_stmt
);
7184 case DW_LNS_set_basic_block
:
7187 /* Add to the address register of the state machine the
7188 address increment value corresponding to special opcode
7189 255. I.e., this value is scaled by the minimum
7190 instruction length since special opcode 255 would have
7191 scaled the the increment. */
7192 case DW_LNS_const_add_pc
:
7193 address
+= (lh
->minimum_instruction_length
7194 * ((255 - lh
->opcode_base
) / lh
->line_range
));
7196 case DW_LNS_fixed_advance_pc
:
7197 address
+= read_2_bytes (abfd
, line_ptr
);
7202 /* Unknown standard opcode, ignore it. */
7205 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
7207 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7208 line_ptr
+= bytes_read
;
7215 if (decode_for_pst_p
)
7219 /* Now that we're done scanning the Line Header Program, we can
7220 create the psymtab of each included file. */
7221 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
7222 if (lh
->file_names
[file_index
].included_p
== 1)
7224 const struct file_entry fe
= lh
->file_names
[file_index
];
7225 char *include_name
= fe
.name
;
7226 char *dir_name
= NULL
;
7227 char *pst_filename
= pst
->filename
;
7230 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
7232 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
7234 include_name
= concat (dir_name
, SLASH_STRING
,
7235 include_name
, (char *)NULL
);
7236 make_cleanup (xfree
, include_name
);
7239 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
7241 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
7242 pst_filename
, (char *)NULL
);
7243 make_cleanup (xfree
, pst_filename
);
7246 if (strcmp (include_name
, pst_filename
) != 0)
7247 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
7252 /* Make sure a symtab is created for every file, even files
7253 which contain only variables (i.e. no code with associated
7257 struct file_entry
*fe
;
7259 for (i
= 0; i
< lh
->num_file_names
; i
++)
7262 fe
= &lh
->file_names
[i
];
7264 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7265 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7267 /* Skip the main file; we don't need it, and it must be
7268 allocated last, so that it will show up before the
7269 non-primary symtabs in the objfile's symtab list. */
7270 if (current_subfile
== first_subfile
)
7273 if (current_subfile
->symtab
== NULL
)
7274 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
7276 fe
->symtab
= current_subfile
->symtab
;
7281 /* Start a subfile for DWARF. FILENAME is the name of the file and
7282 DIRNAME the name of the source directory which contains FILENAME
7283 or NULL if not known. COMP_DIR is the compilation directory for the
7284 linetable's compilation unit or NULL if not known.
7285 This routine tries to keep line numbers from identical absolute and
7286 relative file names in a common subfile.
7288 Using the `list' example from the GDB testsuite, which resides in
7289 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
7290 of /srcdir/list0.c yields the following debugging information for list0.c:
7292 DW_AT_name: /srcdir/list0.c
7293 DW_AT_comp_dir: /compdir
7294 files.files[0].name: list0.h
7295 files.files[0].dir: /srcdir
7296 files.files[1].name: list0.c
7297 files.files[1].dir: /srcdir
7299 The line number information for list0.c has to end up in a single
7300 subfile, so that `break /srcdir/list0.c:1' works as expected.
7301 start_subfile will ensure that this happens provided that we pass the
7302 concatenation of files.files[1].dir and files.files[1].name as the
7306 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
7310 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
7311 `start_symtab' will always pass the contents of DW_AT_comp_dir as
7312 second argument to start_subfile. To be consistent, we do the
7313 same here. In order not to lose the line information directory,
7314 we concatenate it to the filename when it makes sense.
7315 Note that the Dwarf3 standard says (speaking of filenames in line
7316 information): ``The directory index is ignored for file names
7317 that represent full path names''. Thus ignoring dirname in the
7318 `else' branch below isn't an issue. */
7320 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
7321 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
7323 fullname
= filename
;
7325 start_subfile (fullname
, comp_dir
);
7327 if (fullname
!= filename
)
7332 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
7333 struct dwarf2_cu
*cu
)
7335 struct objfile
*objfile
= cu
->objfile
;
7336 struct comp_unit_head
*cu_header
= &cu
->header
;
7338 /* NOTE drow/2003-01-30: There used to be a comment and some special
7339 code here to turn a symbol with DW_AT_external and a
7340 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
7341 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
7342 with some versions of binutils) where shared libraries could have
7343 relocations against symbols in their debug information - the
7344 minimal symbol would have the right address, but the debug info
7345 would not. It's no longer necessary, because we will explicitly
7346 apply relocations when we read in the debug information now. */
7348 /* A DW_AT_location attribute with no contents indicates that a
7349 variable has been optimized away. */
7350 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
7352 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7356 /* Handle one degenerate form of location expression specially, to
7357 preserve GDB's previous behavior when section offsets are
7358 specified. If this is just a DW_OP_addr then mark this symbol
7361 if (attr_form_is_block (attr
)
7362 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
7363 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
7367 SYMBOL_VALUE_ADDRESS (sym
) =
7368 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
7369 fixup_symbol_section (sym
, objfile
);
7370 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
7371 SYMBOL_SECTION (sym
));
7372 SYMBOL_CLASS (sym
) = LOC_STATIC
;
7376 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
7377 expression evaluator, and use LOC_COMPUTED only when necessary
7378 (i.e. when the value of a register or memory location is
7379 referenced, or a thread-local block, etc.). Then again, it might
7380 not be worthwhile. I'm assuming that it isn't unless performance
7381 or memory numbers show me otherwise. */
7383 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
7384 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
7387 /* Given a pointer to a DWARF information entry, figure out if we need
7388 to make a symbol table entry for it, and if so, create a new entry
7389 and return a pointer to it.
7390 If TYPE is NULL, determine symbol type from the die, otherwise
7391 used the passed type. */
7393 static struct symbol
*
7394 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
7396 struct objfile
*objfile
= cu
->objfile
;
7397 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7398 struct symbol
*sym
= NULL
;
7400 struct attribute
*attr
= NULL
;
7401 struct attribute
*attr2
= NULL
;
7404 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7406 if (die
->tag
!= DW_TAG_namespace
)
7407 name
= dwarf2_linkage_name (die
, cu
);
7409 name
= TYPE_NAME (type
);
7413 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
7414 sizeof (struct symbol
));
7415 OBJSTAT (objfile
, n_syms
++);
7416 memset (sym
, 0, sizeof (struct symbol
));
7418 /* Cache this symbol's name and the name's demangled form (if any). */
7419 SYMBOL_LANGUAGE (sym
) = cu
->language
;
7420 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
7422 /* Default assumptions.
7423 Use the passed type or decode it from the die. */
7424 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7425 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7427 SYMBOL_TYPE (sym
) = type
;
7429 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
7430 attr
= dwarf2_attr (die
, DW_AT_decl_line
, cu
);
7433 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
7436 attr
= dwarf2_attr (die
, DW_AT_decl_file
, cu
);
7439 int file_index
= DW_UNSND (attr
);
7440 if (cu
->line_header
== NULL
7441 || file_index
> cu
->line_header
->num_file_names
)
7442 complaint (&symfile_complaints
,
7443 _("file index out of range"));
7444 else if (file_index
> 0)
7446 struct file_entry
*fe
;
7447 fe
= &cu
->line_header
->file_names
[file_index
- 1];
7448 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
7455 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
7458 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
7460 SYMBOL_CLASS (sym
) = LOC_LABEL
;
7462 case DW_TAG_subprogram
:
7463 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
7465 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
7466 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7467 if ((attr2
&& (DW_UNSND (attr2
) != 0))
7468 || cu
->language
== language_ada
)
7470 /* Subprograms marked external are stored as a global symbol.
7471 Ada subprograms, whether marked external or not, are always
7472 stored as a global symbol, because we want to be able to
7473 access them globally. For instance, we want to be able
7474 to break on a nested subprogram without having to
7475 specify the context. */
7476 add_symbol_to_list (sym
, &global_symbols
);
7480 add_symbol_to_list (sym
, cu
->list_in_scope
);
7483 case DW_TAG_variable
:
7484 /* Compilation with minimal debug info may result in variables
7485 with missing type entries. Change the misleading `void' type
7486 to something sensible. */
7487 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
7489 = builtin_type (gdbarch
)->nodebug_data_symbol
;
7491 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7494 dwarf2_const_value (attr
, sym
, cu
);
7495 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7496 if (attr2
&& (DW_UNSND (attr2
) != 0))
7497 add_symbol_to_list (sym
, &global_symbols
);
7499 add_symbol_to_list (sym
, cu
->list_in_scope
);
7502 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7505 var_decode_location (attr
, sym
, cu
);
7506 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7507 if (attr2
&& (DW_UNSND (attr2
) != 0))
7508 add_symbol_to_list (sym
, &global_symbols
);
7510 add_symbol_to_list (sym
, cu
->list_in_scope
);
7514 /* We do not know the address of this symbol.
7515 If it is an external symbol and we have type information
7516 for it, enter the symbol as a LOC_UNRESOLVED symbol.
7517 The address of the variable will then be determined from
7518 the minimal symbol table whenever the variable is
7520 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7521 if (attr2
&& (DW_UNSND (attr2
) != 0)
7522 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
7524 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
7525 add_symbol_to_list (sym
, &global_symbols
);
7529 case DW_TAG_formal_parameter
:
7530 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7533 var_decode_location (attr
, sym
, cu
);
7534 /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
7535 if (SYMBOL_CLASS (sym
) == LOC_COMPUTED
)
7536 SYMBOL_CLASS (sym
) = LOC_COMPUTED_ARG
;
7538 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7541 dwarf2_const_value (attr
, sym
, cu
);
7543 add_symbol_to_list (sym
, cu
->list_in_scope
);
7545 case DW_TAG_unspecified_parameters
:
7546 /* From varargs functions; gdb doesn't seem to have any
7547 interest in this information, so just ignore it for now.
7550 case DW_TAG_class_type
:
7551 case DW_TAG_interface_type
:
7552 case DW_TAG_structure_type
:
7553 case DW_TAG_union_type
:
7554 case DW_TAG_set_type
:
7555 case DW_TAG_enumeration_type
:
7556 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7557 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7559 /* Make sure that the symbol includes appropriate enclosing
7560 classes/namespaces in its name. These are calculated in
7561 read_structure_type, and the correct name is saved in
7564 if (cu
->language
== language_cplus
7565 || cu
->language
== language_java
)
7567 struct type
*type
= SYMBOL_TYPE (sym
);
7569 if (TYPE_TAG_NAME (type
) != NULL
)
7571 /* FIXME: carlton/2003-11-10: Should this use
7572 SYMBOL_SET_NAMES instead? (The same problem also
7573 arises further down in this function.) */
7574 /* The type's name is already allocated along with
7575 this objfile, so we don't need to duplicate it
7577 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
7582 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
7583 really ever be static objects: otherwise, if you try
7584 to, say, break of a class's method and you're in a file
7585 which doesn't mention that class, it won't work unless
7586 the check for all static symbols in lookup_symbol_aux
7587 saves you. See the OtherFileClass tests in
7588 gdb.c++/namespace.exp. */
7590 struct pending
**list_to_add
;
7592 list_to_add
= (cu
->list_in_scope
== &file_symbols
7593 && (cu
->language
== language_cplus
7594 || cu
->language
== language_java
)
7595 ? &global_symbols
: cu
->list_in_scope
);
7597 add_symbol_to_list (sym
, list_to_add
);
7599 /* The semantics of C++ state that "struct foo { ... }" also
7600 defines a typedef for "foo". A Java class declaration also
7601 defines a typedef for the class. Synthesize a typedef symbol
7602 so that "ptype foo" works as expected. */
7603 if (cu
->language
== language_cplus
7604 || cu
->language
== language_java
7605 || cu
->language
== language_ada
)
7607 struct symbol
*typedef_sym
= (struct symbol
*)
7608 obstack_alloc (&objfile
->objfile_obstack
,
7609 sizeof (struct symbol
));
7610 *typedef_sym
= *sym
;
7611 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
7612 /* The symbol's name is already allocated along with
7613 this objfile, so we don't need to duplicate it for
7615 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
7616 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
7617 add_symbol_to_list (typedef_sym
, list_to_add
);
7621 case DW_TAG_typedef
:
7622 if (processing_has_namespace_info
7623 && processing_current_prefix
[0] != '\0')
7625 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7626 processing_current_prefix
,
7629 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7630 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7631 add_symbol_to_list (sym
, cu
->list_in_scope
);
7633 case DW_TAG_base_type
:
7634 case DW_TAG_subrange_type
:
7635 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7636 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7637 add_symbol_to_list (sym
, cu
->list_in_scope
);
7639 case DW_TAG_enumerator
:
7640 if (processing_has_namespace_info
7641 && processing_current_prefix
[0] != '\0')
7643 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7644 processing_current_prefix
,
7647 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7650 dwarf2_const_value (attr
, sym
, cu
);
7653 /* NOTE: carlton/2003-11-10: See comment above in the
7654 DW_TAG_class_type, etc. block. */
7656 struct pending
**list_to_add
;
7658 list_to_add
= (cu
->list_in_scope
== &file_symbols
7659 && (cu
->language
== language_cplus
7660 || cu
->language
== language_java
)
7661 ? &global_symbols
: cu
->list_in_scope
);
7663 add_symbol_to_list (sym
, list_to_add
);
7666 case DW_TAG_namespace
:
7667 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7668 add_symbol_to_list (sym
, &global_symbols
);
7671 /* Not a tag we recognize. Hopefully we aren't processing
7672 trash data, but since we must specifically ignore things
7673 we don't recognize, there is nothing else we should do at
7675 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
7676 dwarf_tag_name (die
->tag
));
7683 /* Copy constant value from an attribute to a symbol. */
7686 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
7687 struct dwarf2_cu
*cu
)
7689 struct objfile
*objfile
= cu
->objfile
;
7690 struct comp_unit_head
*cu_header
= &cu
->header
;
7691 struct dwarf_block
*blk
;
7696 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
7697 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7698 cu_header
->addr_size
,
7699 TYPE_LENGTH (SYMBOL_TYPE
7701 SYMBOL_VALUE_BYTES (sym
) =
7702 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
7703 /* NOTE: cagney/2003-05-09: In-lined store_address call with
7704 it's body - store_unsigned_integer. */
7705 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
7707 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7709 case DW_FORM_block1
:
7710 case DW_FORM_block2
:
7711 case DW_FORM_block4
:
7713 blk
= DW_BLOCK (attr
);
7714 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
7715 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7717 TYPE_LENGTH (SYMBOL_TYPE
7719 SYMBOL_VALUE_BYTES (sym
) =
7720 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
7721 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
7722 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7725 /* The DW_AT_const_value attributes are supposed to carry the
7726 symbol's value "represented as it would be on the target
7727 architecture." By the time we get here, it's already been
7728 converted to host endianness, so we just need to sign- or
7729 zero-extend it as appropriate. */
7731 dwarf2_const_value_data (attr
, sym
, 8);
7734 dwarf2_const_value_data (attr
, sym
, 16);
7737 dwarf2_const_value_data (attr
, sym
, 32);
7740 dwarf2_const_value_data (attr
, sym
, 64);
7744 SYMBOL_VALUE (sym
) = DW_SND (attr
);
7745 SYMBOL_CLASS (sym
) = LOC_CONST
;
7749 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
7750 SYMBOL_CLASS (sym
) = LOC_CONST
;
7754 complaint (&symfile_complaints
,
7755 _("unsupported const value attribute form: '%s'"),
7756 dwarf_form_name (attr
->form
));
7757 SYMBOL_VALUE (sym
) = 0;
7758 SYMBOL_CLASS (sym
) = LOC_CONST
;
7764 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
7765 or zero-extend it as appropriate for the symbol's type. */
7767 dwarf2_const_value_data (struct attribute
*attr
,
7771 LONGEST l
= DW_UNSND (attr
);
7773 if (bits
< sizeof (l
) * 8)
7775 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
7776 l
&= ((LONGEST
) 1 << bits
) - 1;
7778 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
7781 SYMBOL_VALUE (sym
) = l
;
7782 SYMBOL_CLASS (sym
) = LOC_CONST
;
7786 /* Return the type of the die in question using its DW_AT_type attribute. */
7788 static struct type
*
7789 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7791 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7793 struct attribute
*type_attr
;
7794 struct die_info
*type_die
;
7796 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
7799 /* A missing DW_AT_type represents a void type. */
7800 return builtin_type (gdbarch
)->builtin_void
;
7803 type_die
= follow_die_ref (die
, type_attr
, cu
);
7805 type
= tag_type_to_type (type_die
, cu
);
7808 dump_die (type_die
);
7809 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
7815 /* Return the containing type of the die in question using its
7816 DW_AT_containing_type attribute. */
7818 static struct type
*
7819 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7821 struct type
*type
= NULL
;
7822 struct attribute
*type_attr
;
7823 struct die_info
*type_die
= NULL
;
7825 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
7828 type_die
= follow_die_ref (die
, type_attr
, cu
);
7829 type
= tag_type_to_type (type_die
, cu
);
7834 dump_die (type_die
);
7835 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
7841 static struct type
*
7842 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7850 read_type_die (die
, cu
);
7854 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
7862 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7864 char *prefix
= determine_prefix (die
, cu
);
7865 const char *old_prefix
= processing_current_prefix
;
7866 struct cleanup
*back_to
= make_cleanup (xfree
, prefix
);
7867 processing_current_prefix
= prefix
;
7871 case DW_TAG_class_type
:
7872 case DW_TAG_interface_type
:
7873 case DW_TAG_structure_type
:
7874 case DW_TAG_union_type
:
7875 read_structure_type (die
, cu
);
7877 case DW_TAG_enumeration_type
:
7878 read_enumeration_type (die
, cu
);
7880 case DW_TAG_subprogram
:
7881 case DW_TAG_subroutine_type
:
7882 read_subroutine_type (die
, cu
);
7884 case DW_TAG_array_type
:
7885 read_array_type (die
, cu
);
7887 case DW_TAG_set_type
:
7888 read_set_type (die
, cu
);
7890 case DW_TAG_pointer_type
:
7891 read_tag_pointer_type (die
, cu
);
7893 case DW_TAG_ptr_to_member_type
:
7894 read_tag_ptr_to_member_type (die
, cu
);
7896 case DW_TAG_reference_type
:
7897 read_tag_reference_type (die
, cu
);
7899 case DW_TAG_const_type
:
7900 read_tag_const_type (die
, cu
);
7902 case DW_TAG_volatile_type
:
7903 read_tag_volatile_type (die
, cu
);
7905 case DW_TAG_string_type
:
7906 read_tag_string_type (die
, cu
);
7908 case DW_TAG_typedef
:
7909 read_typedef (die
, cu
);
7911 case DW_TAG_subrange_type
:
7912 read_subrange_type (die
, cu
);
7914 case DW_TAG_base_type
:
7915 read_base_type (die
, cu
);
7917 case DW_TAG_unspecified_type
:
7918 read_unspecified_type (die
, cu
);
7921 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
7922 dwarf_tag_name (die
->tag
));
7926 processing_current_prefix
= old_prefix
;
7927 do_cleanups (back_to
);
7930 /* Return the name of the namespace/class that DIE is defined within,
7931 or "" if we can't tell. The caller should xfree the result. */
7933 /* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
7934 therein) for an example of how to use this function to deal with
7935 DW_AT_specification. */
7938 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
7940 struct die_info
*parent
;
7942 if (cu
->language
!= language_cplus
7943 && cu
->language
!= language_java
)
7946 parent
= die
->parent
;
7950 return xstrdup ("");
7954 switch (parent
->tag
) {
7955 case DW_TAG_namespace
:
7957 /* FIXME: carlton/2004-03-05: Should I follow extension dies
7958 before doing this check? */
7959 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7961 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7966 char *parent_prefix
= determine_prefix (parent
, cu
);
7967 char *retval
= typename_concat (NULL
, parent_prefix
,
7968 namespace_name (parent
, &dummy
,
7971 xfree (parent_prefix
);
7976 case DW_TAG_class_type
:
7977 case DW_TAG_interface_type
:
7978 case DW_TAG_structure_type
:
7980 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7982 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7986 const char *old_prefix
= processing_current_prefix
;
7987 char *new_prefix
= determine_prefix (parent
, cu
);
7990 processing_current_prefix
= new_prefix
;
7991 retval
= determine_class_name (parent
, cu
);
7992 processing_current_prefix
= old_prefix
;
7999 return determine_prefix (parent
, cu
);
8004 /* Return a newly-allocated string formed by concatenating PREFIX and
8005 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
8006 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
8007 perform an obconcat, otherwise allocate storage for the result. The CU argument
8008 is used to determine the language and hence, the appropriate separator. */
8010 #define MAX_SEP_LEN 2 /* sizeof ("::") */
8013 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
8014 struct dwarf2_cu
*cu
)
8018 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
8020 else if (cu
->language
== language_java
)
8027 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
8032 strcpy (retval
, prefix
);
8033 strcat (retval
, sep
);
8036 strcat (retval
, suffix
);
8042 /* We have an obstack. */
8043 return obconcat (obs
, prefix
, sep
, suffix
);
8049 copy_die (struct die_info
*old_die
)
8051 struct die_info
*new_die
;
8054 new_die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
8055 memset (new_die
, 0, sizeof (struct die_info
));
8057 new_die
->tag
= old_die
->tag
;
8058 new_die
->has_children
= old_die
->has_children
;
8059 new_die
->abbrev
= old_die
->abbrev
;
8060 new_die
->offset
= old_die
->offset
;
8061 new_die
->type
= NULL
;
8063 num_attrs
= old_die
->num_attrs
;
8064 new_die
->num_attrs
= num_attrs
;
8065 new_die
->attrs
= (struct attribute
*)
8066 xmalloc (num_attrs
* sizeof (struct attribute
));
8068 for (i
= 0; i
< old_die
->num_attrs
; ++i
)
8070 new_die
->attrs
[i
].name
= old_die
->attrs
[i
].name
;
8071 new_die
->attrs
[i
].form
= old_die
->attrs
[i
].form
;
8072 new_die
->attrs
[i
].u
.addr
= old_die
->attrs
[i
].u
.addr
;
8075 new_die
->next
= NULL
;
8080 /* Return sibling of die, NULL if no sibling. */
8082 static struct die_info
*
8083 sibling_die (struct die_info
*die
)
8085 return die
->sibling
;
8088 /* Get linkage name of a die, return NULL if not found. */
8091 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8093 struct attribute
*attr
;
8095 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8096 if (attr
&& DW_STRING (attr
))
8097 return DW_STRING (attr
);
8098 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8099 if (attr
&& DW_STRING (attr
))
8100 return DW_STRING (attr
);
8104 /* Get name of a die, return NULL if not found. */
8107 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8109 struct attribute
*attr
;
8111 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8112 if (attr
&& DW_STRING (attr
))
8113 return DW_STRING (attr
);
8117 /* Return the die that this die in an extension of, or NULL if there
8120 static struct die_info
*
8121 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
*cu
)
8123 struct attribute
*attr
;
8125 attr
= dwarf2_attr (die
, DW_AT_extension
, cu
);
8129 return follow_die_ref (die
, attr
, cu
);
8132 /* Convert a DIE tag into its string name. */
8135 dwarf_tag_name (unsigned tag
)
8139 case DW_TAG_padding
:
8140 return "DW_TAG_padding";
8141 case DW_TAG_array_type
:
8142 return "DW_TAG_array_type";
8143 case DW_TAG_class_type
:
8144 return "DW_TAG_class_type";
8145 case DW_TAG_entry_point
:
8146 return "DW_TAG_entry_point";
8147 case DW_TAG_enumeration_type
:
8148 return "DW_TAG_enumeration_type";
8149 case DW_TAG_formal_parameter
:
8150 return "DW_TAG_formal_parameter";
8151 case DW_TAG_imported_declaration
:
8152 return "DW_TAG_imported_declaration";
8154 return "DW_TAG_label";
8155 case DW_TAG_lexical_block
:
8156 return "DW_TAG_lexical_block";
8158 return "DW_TAG_member";
8159 case DW_TAG_pointer_type
:
8160 return "DW_TAG_pointer_type";
8161 case DW_TAG_reference_type
:
8162 return "DW_TAG_reference_type";
8163 case DW_TAG_compile_unit
:
8164 return "DW_TAG_compile_unit";
8165 case DW_TAG_string_type
:
8166 return "DW_TAG_string_type";
8167 case DW_TAG_structure_type
:
8168 return "DW_TAG_structure_type";
8169 case DW_TAG_subroutine_type
:
8170 return "DW_TAG_subroutine_type";
8171 case DW_TAG_typedef
:
8172 return "DW_TAG_typedef";
8173 case DW_TAG_union_type
:
8174 return "DW_TAG_union_type";
8175 case DW_TAG_unspecified_parameters
:
8176 return "DW_TAG_unspecified_parameters";
8177 case DW_TAG_variant
:
8178 return "DW_TAG_variant";
8179 case DW_TAG_common_block
:
8180 return "DW_TAG_common_block";
8181 case DW_TAG_common_inclusion
:
8182 return "DW_TAG_common_inclusion";
8183 case DW_TAG_inheritance
:
8184 return "DW_TAG_inheritance";
8185 case DW_TAG_inlined_subroutine
:
8186 return "DW_TAG_inlined_subroutine";
8188 return "DW_TAG_module";
8189 case DW_TAG_ptr_to_member_type
:
8190 return "DW_TAG_ptr_to_member_type";
8191 case DW_TAG_set_type
:
8192 return "DW_TAG_set_type";
8193 case DW_TAG_subrange_type
:
8194 return "DW_TAG_subrange_type";
8195 case DW_TAG_with_stmt
:
8196 return "DW_TAG_with_stmt";
8197 case DW_TAG_access_declaration
:
8198 return "DW_TAG_access_declaration";
8199 case DW_TAG_base_type
:
8200 return "DW_TAG_base_type";
8201 case DW_TAG_catch_block
:
8202 return "DW_TAG_catch_block";
8203 case DW_TAG_const_type
:
8204 return "DW_TAG_const_type";
8205 case DW_TAG_constant
:
8206 return "DW_TAG_constant";
8207 case DW_TAG_enumerator
:
8208 return "DW_TAG_enumerator";
8209 case DW_TAG_file_type
:
8210 return "DW_TAG_file_type";
8212 return "DW_TAG_friend";
8213 case DW_TAG_namelist
:
8214 return "DW_TAG_namelist";
8215 case DW_TAG_namelist_item
:
8216 return "DW_TAG_namelist_item";
8217 case DW_TAG_packed_type
:
8218 return "DW_TAG_packed_type";
8219 case DW_TAG_subprogram
:
8220 return "DW_TAG_subprogram";
8221 case DW_TAG_template_type_param
:
8222 return "DW_TAG_template_type_param";
8223 case DW_TAG_template_value_param
:
8224 return "DW_TAG_template_value_param";
8225 case DW_TAG_thrown_type
:
8226 return "DW_TAG_thrown_type";
8227 case DW_TAG_try_block
:
8228 return "DW_TAG_try_block";
8229 case DW_TAG_variant_part
:
8230 return "DW_TAG_variant_part";
8231 case DW_TAG_variable
:
8232 return "DW_TAG_variable";
8233 case DW_TAG_volatile_type
:
8234 return "DW_TAG_volatile_type";
8235 case DW_TAG_dwarf_procedure
:
8236 return "DW_TAG_dwarf_procedure";
8237 case DW_TAG_restrict_type
:
8238 return "DW_TAG_restrict_type";
8239 case DW_TAG_interface_type
:
8240 return "DW_TAG_interface_type";
8241 case DW_TAG_namespace
:
8242 return "DW_TAG_namespace";
8243 case DW_TAG_imported_module
:
8244 return "DW_TAG_imported_module";
8245 case DW_TAG_unspecified_type
:
8246 return "DW_TAG_unspecified_type";
8247 case DW_TAG_partial_unit
:
8248 return "DW_TAG_partial_unit";
8249 case DW_TAG_imported_unit
:
8250 return "DW_TAG_imported_unit";
8251 case DW_TAG_condition
:
8252 return "DW_TAG_condition";
8253 case DW_TAG_shared_type
:
8254 return "DW_TAG_shared_type";
8255 case DW_TAG_MIPS_loop
:
8256 return "DW_TAG_MIPS_loop";
8257 case DW_TAG_HP_array_descriptor
:
8258 return "DW_TAG_HP_array_descriptor";
8259 case DW_TAG_format_label
:
8260 return "DW_TAG_format_label";
8261 case DW_TAG_function_template
:
8262 return "DW_TAG_function_template";
8263 case DW_TAG_class_template
:
8264 return "DW_TAG_class_template";
8265 case DW_TAG_GNU_BINCL
:
8266 return "DW_TAG_GNU_BINCL";
8267 case DW_TAG_GNU_EINCL
:
8268 return "DW_TAG_GNU_EINCL";
8269 case DW_TAG_upc_shared_type
:
8270 return "DW_TAG_upc_shared_type";
8271 case DW_TAG_upc_strict_type
:
8272 return "DW_TAG_upc_strict_type";
8273 case DW_TAG_upc_relaxed_type
:
8274 return "DW_TAG_upc_relaxed_type";
8275 case DW_TAG_PGI_kanji_type
:
8276 return "DW_TAG_PGI_kanji_type";
8277 case DW_TAG_PGI_interface_block
:
8278 return "DW_TAG_PGI_interface_block";
8280 return "DW_TAG_<unknown>";
8284 /* Convert a DWARF attribute code into its string name. */
8287 dwarf_attr_name (unsigned attr
)
8292 return "DW_AT_sibling";
8293 case DW_AT_location
:
8294 return "DW_AT_location";
8296 return "DW_AT_name";
8297 case DW_AT_ordering
:
8298 return "DW_AT_ordering";
8299 case DW_AT_subscr_data
:
8300 return "DW_AT_subscr_data";
8301 case DW_AT_byte_size
:
8302 return "DW_AT_byte_size";
8303 case DW_AT_bit_offset
:
8304 return "DW_AT_bit_offset";
8305 case DW_AT_bit_size
:
8306 return "DW_AT_bit_size";
8307 case DW_AT_element_list
:
8308 return "DW_AT_element_list";
8309 case DW_AT_stmt_list
:
8310 return "DW_AT_stmt_list";
8312 return "DW_AT_low_pc";
8314 return "DW_AT_high_pc";
8315 case DW_AT_language
:
8316 return "DW_AT_language";
8318 return "DW_AT_member";
8320 return "DW_AT_discr";
8321 case DW_AT_discr_value
:
8322 return "DW_AT_discr_value";
8323 case DW_AT_visibility
:
8324 return "DW_AT_visibility";
8326 return "DW_AT_import";
8327 case DW_AT_string_length
:
8328 return "DW_AT_string_length";
8329 case DW_AT_common_reference
:
8330 return "DW_AT_common_reference";
8331 case DW_AT_comp_dir
:
8332 return "DW_AT_comp_dir";
8333 case DW_AT_const_value
:
8334 return "DW_AT_const_value";
8335 case DW_AT_containing_type
:
8336 return "DW_AT_containing_type";
8337 case DW_AT_default_value
:
8338 return "DW_AT_default_value";
8340 return "DW_AT_inline";
8341 case DW_AT_is_optional
:
8342 return "DW_AT_is_optional";
8343 case DW_AT_lower_bound
:
8344 return "DW_AT_lower_bound";
8345 case DW_AT_producer
:
8346 return "DW_AT_producer";
8347 case DW_AT_prototyped
:
8348 return "DW_AT_prototyped";
8349 case DW_AT_return_addr
:
8350 return "DW_AT_return_addr";
8351 case DW_AT_start_scope
:
8352 return "DW_AT_start_scope";
8353 case DW_AT_bit_stride
:
8354 return "DW_AT_bit_stride";
8355 case DW_AT_upper_bound
:
8356 return "DW_AT_upper_bound";
8357 case DW_AT_abstract_origin
:
8358 return "DW_AT_abstract_origin";
8359 case DW_AT_accessibility
:
8360 return "DW_AT_accessibility";
8361 case DW_AT_address_class
:
8362 return "DW_AT_address_class";
8363 case DW_AT_artificial
:
8364 return "DW_AT_artificial";
8365 case DW_AT_base_types
:
8366 return "DW_AT_base_types";
8367 case DW_AT_calling_convention
:
8368 return "DW_AT_calling_convention";
8370 return "DW_AT_count";
8371 case DW_AT_data_member_location
:
8372 return "DW_AT_data_member_location";
8373 case DW_AT_decl_column
:
8374 return "DW_AT_decl_column";
8375 case DW_AT_decl_file
:
8376 return "DW_AT_decl_file";
8377 case DW_AT_decl_line
:
8378 return "DW_AT_decl_line";
8379 case DW_AT_declaration
:
8380 return "DW_AT_declaration";
8381 case DW_AT_discr_list
:
8382 return "DW_AT_discr_list";
8383 case DW_AT_encoding
:
8384 return "DW_AT_encoding";
8385 case DW_AT_external
:
8386 return "DW_AT_external";
8387 case DW_AT_frame_base
:
8388 return "DW_AT_frame_base";
8390 return "DW_AT_friend";
8391 case DW_AT_identifier_case
:
8392 return "DW_AT_identifier_case";
8393 case DW_AT_macro_info
:
8394 return "DW_AT_macro_info";
8395 case DW_AT_namelist_items
:
8396 return "DW_AT_namelist_items";
8397 case DW_AT_priority
:
8398 return "DW_AT_priority";
8400 return "DW_AT_segment";
8401 case DW_AT_specification
:
8402 return "DW_AT_specification";
8403 case DW_AT_static_link
:
8404 return "DW_AT_static_link";
8406 return "DW_AT_type";
8407 case DW_AT_use_location
:
8408 return "DW_AT_use_location";
8409 case DW_AT_variable_parameter
:
8410 return "DW_AT_variable_parameter";
8411 case DW_AT_virtuality
:
8412 return "DW_AT_virtuality";
8413 case DW_AT_vtable_elem_location
:
8414 return "DW_AT_vtable_elem_location";
8415 /* DWARF 3 values. */
8416 case DW_AT_allocated
:
8417 return "DW_AT_allocated";
8418 case DW_AT_associated
:
8419 return "DW_AT_associated";
8420 case DW_AT_data_location
:
8421 return "DW_AT_data_location";
8422 case DW_AT_byte_stride
:
8423 return "DW_AT_byte_stride";
8424 case DW_AT_entry_pc
:
8425 return "DW_AT_entry_pc";
8426 case DW_AT_use_UTF8
:
8427 return "DW_AT_use_UTF8";
8428 case DW_AT_extension
:
8429 return "DW_AT_extension";
8431 return "DW_AT_ranges";
8432 case DW_AT_trampoline
:
8433 return "DW_AT_trampoline";
8434 case DW_AT_call_column
:
8435 return "DW_AT_call_column";
8436 case DW_AT_call_file
:
8437 return "DW_AT_call_file";
8438 case DW_AT_call_line
:
8439 return "DW_AT_call_line";
8440 case DW_AT_description
:
8441 return "DW_AT_description";
8442 case DW_AT_binary_scale
:
8443 return "DW_AT_binary_scale";
8444 case DW_AT_decimal_scale
:
8445 return "DW_AT_decimal_scale";
8447 return "DW_AT_small";
8448 case DW_AT_decimal_sign
:
8449 return "DW_AT_decimal_sign";
8450 case DW_AT_digit_count
:
8451 return "DW_AT_digit_count";
8452 case DW_AT_picture_string
:
8453 return "DW_AT_picture_string";
8455 return "DW_AT_mutable";
8456 case DW_AT_threads_scaled
:
8457 return "DW_AT_threads_scaled";
8458 case DW_AT_explicit
:
8459 return "DW_AT_explicit";
8460 case DW_AT_object_pointer
:
8461 return "DW_AT_object_pointer";
8462 case DW_AT_endianity
:
8463 return "DW_AT_endianity";
8464 case DW_AT_elemental
:
8465 return "DW_AT_elemental";
8467 return "DW_AT_pure";
8468 case DW_AT_recursive
:
8469 return "DW_AT_recursive";
8471 /* SGI/MIPS extensions. */
8472 case DW_AT_MIPS_fde
:
8473 return "DW_AT_MIPS_fde";
8474 case DW_AT_MIPS_loop_begin
:
8475 return "DW_AT_MIPS_loop_begin";
8476 case DW_AT_MIPS_tail_loop_begin
:
8477 return "DW_AT_MIPS_tail_loop_begin";
8478 case DW_AT_MIPS_epilog_begin
:
8479 return "DW_AT_MIPS_epilog_begin";
8480 case DW_AT_MIPS_loop_unroll_factor
:
8481 return "DW_AT_MIPS_loop_unroll_factor";
8482 case DW_AT_MIPS_software_pipeline_depth
:
8483 return "DW_AT_MIPS_software_pipeline_depth";
8484 case DW_AT_MIPS_linkage_name
:
8485 return "DW_AT_MIPS_linkage_name";
8486 case DW_AT_MIPS_stride
:
8487 return "DW_AT_MIPS_stride";
8488 case DW_AT_MIPS_abstract_name
:
8489 return "DW_AT_MIPS_abstract_name";
8490 case DW_AT_MIPS_clone_origin
:
8491 return "DW_AT_MIPS_clone_origin";
8492 case DW_AT_MIPS_has_inlines
:
8493 return "DW_AT_MIPS_has_inlines";
8495 /* HP extensions. */
8496 case DW_AT_HP_block_index
:
8497 return "DW_AT_HP_block_index";
8498 case DW_AT_HP_unmodifiable
:
8499 return "DW_AT_HP_unmodifiable";
8500 case DW_AT_HP_actuals_stmt_list
:
8501 return "DW_AT_HP_actuals_stmt_list";
8502 case DW_AT_HP_proc_per_section
:
8503 return "DW_AT_HP_proc_per_section";
8504 case DW_AT_HP_raw_data_ptr
:
8505 return "DW_AT_HP_raw_data_ptr";
8506 case DW_AT_HP_pass_by_reference
:
8507 return "DW_AT_HP_pass_by_reference";
8508 case DW_AT_HP_opt_level
:
8509 return "DW_AT_HP_opt_level";
8510 case DW_AT_HP_prof_version_id
:
8511 return "DW_AT_HP_prof_version_id";
8512 case DW_AT_HP_opt_flags
:
8513 return "DW_AT_HP_opt_flags";
8514 case DW_AT_HP_cold_region_low_pc
:
8515 return "DW_AT_HP_cold_region_low_pc";
8516 case DW_AT_HP_cold_region_high_pc
:
8517 return "DW_AT_HP_cold_region_high_pc";
8518 case DW_AT_HP_all_variables_modifiable
:
8519 return "DW_AT_HP_all_variables_modifiable";
8520 case DW_AT_HP_linkage_name
:
8521 return "DW_AT_HP_linkage_name";
8522 case DW_AT_HP_prof_flags
:
8523 return "DW_AT_HP_prof_flags";
8524 /* GNU extensions. */
8525 case DW_AT_sf_names
:
8526 return "DW_AT_sf_names";
8527 case DW_AT_src_info
:
8528 return "DW_AT_src_info";
8529 case DW_AT_mac_info
:
8530 return "DW_AT_mac_info";
8531 case DW_AT_src_coords
:
8532 return "DW_AT_src_coords";
8533 case DW_AT_body_begin
:
8534 return "DW_AT_body_begin";
8535 case DW_AT_body_end
:
8536 return "DW_AT_body_end";
8537 case DW_AT_GNU_vector
:
8538 return "DW_AT_GNU_vector";
8539 /* VMS extensions. */
8540 case DW_AT_VMS_rtnbeg_pd_address
:
8541 return "DW_AT_VMS_rtnbeg_pd_address";
8542 /* UPC extension. */
8543 case DW_AT_upc_threads_scaled
:
8544 return "DW_AT_upc_threads_scaled";
8545 /* PGI (STMicroelectronics) extensions. */
8546 case DW_AT_PGI_lbase
:
8547 return "DW_AT_PGI_lbase";
8548 case DW_AT_PGI_soffset
:
8549 return "DW_AT_PGI_soffset";
8550 case DW_AT_PGI_lstride
:
8551 return "DW_AT_PGI_lstride";
8553 return "DW_AT_<unknown>";
8557 /* Convert a DWARF value form code into its string name. */
8560 dwarf_form_name (unsigned form
)
8565 return "DW_FORM_addr";
8566 case DW_FORM_block2
:
8567 return "DW_FORM_block2";
8568 case DW_FORM_block4
:
8569 return "DW_FORM_block4";
8571 return "DW_FORM_data2";
8573 return "DW_FORM_data4";
8575 return "DW_FORM_data8";
8576 case DW_FORM_string
:
8577 return "DW_FORM_string";
8579 return "DW_FORM_block";
8580 case DW_FORM_block1
:
8581 return "DW_FORM_block1";
8583 return "DW_FORM_data1";
8585 return "DW_FORM_flag";
8587 return "DW_FORM_sdata";
8589 return "DW_FORM_strp";
8591 return "DW_FORM_udata";
8592 case DW_FORM_ref_addr
:
8593 return "DW_FORM_ref_addr";
8595 return "DW_FORM_ref1";
8597 return "DW_FORM_ref2";
8599 return "DW_FORM_ref4";
8601 return "DW_FORM_ref8";
8602 case DW_FORM_ref_udata
:
8603 return "DW_FORM_ref_udata";
8604 case DW_FORM_indirect
:
8605 return "DW_FORM_indirect";
8607 return "DW_FORM_<unknown>";
8611 /* Convert a DWARF stack opcode into its string name. */
8614 dwarf_stack_op_name (unsigned op
)
8619 return "DW_OP_addr";
8621 return "DW_OP_deref";
8623 return "DW_OP_const1u";
8625 return "DW_OP_const1s";
8627 return "DW_OP_const2u";
8629 return "DW_OP_const2s";
8631 return "DW_OP_const4u";
8633 return "DW_OP_const4s";
8635 return "DW_OP_const8u";
8637 return "DW_OP_const8s";
8639 return "DW_OP_constu";
8641 return "DW_OP_consts";
8645 return "DW_OP_drop";
8647 return "DW_OP_over";
8649 return "DW_OP_pick";
8651 return "DW_OP_swap";
8655 return "DW_OP_xderef";
8663 return "DW_OP_minus";
8675 return "DW_OP_plus";
8676 case DW_OP_plus_uconst
:
8677 return "DW_OP_plus_uconst";
8683 return "DW_OP_shra";
8701 return "DW_OP_skip";
8703 return "DW_OP_lit0";
8705 return "DW_OP_lit1";
8707 return "DW_OP_lit2";
8709 return "DW_OP_lit3";
8711 return "DW_OP_lit4";
8713 return "DW_OP_lit5";
8715 return "DW_OP_lit6";
8717 return "DW_OP_lit7";
8719 return "DW_OP_lit8";
8721 return "DW_OP_lit9";
8723 return "DW_OP_lit10";
8725 return "DW_OP_lit11";
8727 return "DW_OP_lit12";
8729 return "DW_OP_lit13";
8731 return "DW_OP_lit14";
8733 return "DW_OP_lit15";
8735 return "DW_OP_lit16";
8737 return "DW_OP_lit17";
8739 return "DW_OP_lit18";
8741 return "DW_OP_lit19";
8743 return "DW_OP_lit20";
8745 return "DW_OP_lit21";
8747 return "DW_OP_lit22";
8749 return "DW_OP_lit23";
8751 return "DW_OP_lit24";
8753 return "DW_OP_lit25";
8755 return "DW_OP_lit26";
8757 return "DW_OP_lit27";
8759 return "DW_OP_lit28";
8761 return "DW_OP_lit29";
8763 return "DW_OP_lit30";
8765 return "DW_OP_lit31";
8767 return "DW_OP_reg0";
8769 return "DW_OP_reg1";
8771 return "DW_OP_reg2";
8773 return "DW_OP_reg3";
8775 return "DW_OP_reg4";
8777 return "DW_OP_reg5";
8779 return "DW_OP_reg6";
8781 return "DW_OP_reg7";
8783 return "DW_OP_reg8";
8785 return "DW_OP_reg9";
8787 return "DW_OP_reg10";
8789 return "DW_OP_reg11";
8791 return "DW_OP_reg12";
8793 return "DW_OP_reg13";
8795 return "DW_OP_reg14";
8797 return "DW_OP_reg15";
8799 return "DW_OP_reg16";
8801 return "DW_OP_reg17";
8803 return "DW_OP_reg18";
8805 return "DW_OP_reg19";
8807 return "DW_OP_reg20";
8809 return "DW_OP_reg21";
8811 return "DW_OP_reg22";
8813 return "DW_OP_reg23";
8815 return "DW_OP_reg24";
8817 return "DW_OP_reg25";
8819 return "DW_OP_reg26";
8821 return "DW_OP_reg27";
8823 return "DW_OP_reg28";
8825 return "DW_OP_reg29";
8827 return "DW_OP_reg30";
8829 return "DW_OP_reg31";
8831 return "DW_OP_breg0";
8833 return "DW_OP_breg1";
8835 return "DW_OP_breg2";
8837 return "DW_OP_breg3";
8839 return "DW_OP_breg4";
8841 return "DW_OP_breg5";
8843 return "DW_OP_breg6";
8845 return "DW_OP_breg7";
8847 return "DW_OP_breg8";
8849 return "DW_OP_breg9";
8851 return "DW_OP_breg10";
8853 return "DW_OP_breg11";
8855 return "DW_OP_breg12";
8857 return "DW_OP_breg13";
8859 return "DW_OP_breg14";
8861 return "DW_OP_breg15";
8863 return "DW_OP_breg16";
8865 return "DW_OP_breg17";
8867 return "DW_OP_breg18";
8869 return "DW_OP_breg19";
8871 return "DW_OP_breg20";
8873 return "DW_OP_breg21";
8875 return "DW_OP_breg22";
8877 return "DW_OP_breg23";
8879 return "DW_OP_breg24";
8881 return "DW_OP_breg25";
8883 return "DW_OP_breg26";
8885 return "DW_OP_breg27";
8887 return "DW_OP_breg28";
8889 return "DW_OP_breg29";
8891 return "DW_OP_breg30";
8893 return "DW_OP_breg31";
8895 return "DW_OP_regx";
8897 return "DW_OP_fbreg";
8899 return "DW_OP_bregx";
8901 return "DW_OP_piece";
8902 case DW_OP_deref_size
:
8903 return "DW_OP_deref_size";
8904 case DW_OP_xderef_size
:
8905 return "DW_OP_xderef_size";
8908 /* DWARF 3 extensions. */
8909 case DW_OP_push_object_address
:
8910 return "DW_OP_push_object_address";
8912 return "DW_OP_call2";
8914 return "DW_OP_call4";
8915 case DW_OP_call_ref
:
8916 return "DW_OP_call_ref";
8917 /* GNU extensions. */
8918 case DW_OP_form_tls_address
:
8919 return "DW_OP_form_tls_address";
8920 case DW_OP_call_frame_cfa
:
8921 return "DW_OP_call_frame_cfa";
8922 case DW_OP_bit_piece
:
8923 return "DW_OP_bit_piece";
8924 case DW_OP_GNU_push_tls_address
:
8925 return "DW_OP_GNU_push_tls_address";
8926 case DW_OP_GNU_uninit
:
8927 return "DW_OP_GNU_uninit";
8928 /* HP extensions. */
8929 case DW_OP_HP_is_value
:
8930 return "DW_OP_HP_is_value";
8931 case DW_OP_HP_fltconst4
:
8932 return "DW_OP_HP_fltconst4";
8933 case DW_OP_HP_fltconst8
:
8934 return "DW_OP_HP_fltconst8";
8935 case DW_OP_HP_mod_range
:
8936 return "DW_OP_HP_mod_range";
8937 case DW_OP_HP_unmod_range
:
8938 return "DW_OP_HP_unmod_range";
8940 return "DW_OP_HP_tls";
8942 return "OP_<unknown>";
8947 dwarf_bool_name (unsigned mybool
)
8955 /* Convert a DWARF type code into its string name. */
8958 dwarf_type_encoding_name (unsigned enc
)
8963 return "DW_ATE_void";
8964 case DW_ATE_address
:
8965 return "DW_ATE_address";
8966 case DW_ATE_boolean
:
8967 return "DW_ATE_boolean";
8968 case DW_ATE_complex_float
:
8969 return "DW_ATE_complex_float";
8971 return "DW_ATE_float";
8973 return "DW_ATE_signed";
8974 case DW_ATE_signed_char
:
8975 return "DW_ATE_signed_char";
8976 case DW_ATE_unsigned
:
8977 return "DW_ATE_unsigned";
8978 case DW_ATE_unsigned_char
:
8979 return "DW_ATE_unsigned_char";
8981 case DW_ATE_imaginary_float
:
8982 return "DW_ATE_imaginary_float";
8983 case DW_ATE_packed_decimal
:
8984 return "DW_ATE_packed_decimal";
8985 case DW_ATE_numeric_string
:
8986 return "DW_ATE_numeric_string";
8988 return "DW_ATE_edited";
8989 case DW_ATE_signed_fixed
:
8990 return "DW_ATE_signed_fixed";
8991 case DW_ATE_unsigned_fixed
:
8992 return "DW_ATE_unsigned_fixed";
8993 case DW_ATE_decimal_float
:
8994 return "DW_ATE_decimal_float";
8995 /* HP extensions. */
8996 case DW_ATE_HP_float80
:
8997 return "DW_ATE_HP_float80";
8998 case DW_ATE_HP_complex_float80
:
8999 return "DW_ATE_HP_complex_float80";
9000 case DW_ATE_HP_float128
:
9001 return "DW_ATE_HP_float128";
9002 case DW_ATE_HP_complex_float128
:
9003 return "DW_ATE_HP_complex_float128";
9004 case DW_ATE_HP_floathpintel
:
9005 return "DW_ATE_HP_floathpintel";
9006 case DW_ATE_HP_imaginary_float80
:
9007 return "DW_ATE_HP_imaginary_float80";
9008 case DW_ATE_HP_imaginary_float128
:
9009 return "DW_ATE_HP_imaginary_float128";
9011 return "DW_ATE_<unknown>";
9015 /* Convert a DWARF call frame info operation to its string name. */
9019 dwarf_cfi_name (unsigned cfi_opc
)
9023 case DW_CFA_advance_loc
:
9024 return "DW_CFA_advance_loc";
9026 return "DW_CFA_offset";
9027 case DW_CFA_restore
:
9028 return "DW_CFA_restore";
9030 return "DW_CFA_nop";
9031 case DW_CFA_set_loc
:
9032 return "DW_CFA_set_loc";
9033 case DW_CFA_advance_loc1
:
9034 return "DW_CFA_advance_loc1";
9035 case DW_CFA_advance_loc2
:
9036 return "DW_CFA_advance_loc2";
9037 case DW_CFA_advance_loc4
:
9038 return "DW_CFA_advance_loc4";
9039 case DW_CFA_offset_extended
:
9040 return "DW_CFA_offset_extended";
9041 case DW_CFA_restore_extended
:
9042 return "DW_CFA_restore_extended";
9043 case DW_CFA_undefined
:
9044 return "DW_CFA_undefined";
9045 case DW_CFA_same_value
:
9046 return "DW_CFA_same_value";
9047 case DW_CFA_register
:
9048 return "DW_CFA_register";
9049 case DW_CFA_remember_state
:
9050 return "DW_CFA_remember_state";
9051 case DW_CFA_restore_state
:
9052 return "DW_CFA_restore_state";
9053 case DW_CFA_def_cfa
:
9054 return "DW_CFA_def_cfa";
9055 case DW_CFA_def_cfa_register
:
9056 return "DW_CFA_def_cfa_register";
9057 case DW_CFA_def_cfa_offset
:
9058 return "DW_CFA_def_cfa_offset";
9060 case DW_CFA_def_cfa_expression
:
9061 return "DW_CFA_def_cfa_expression";
9062 case DW_CFA_expression
:
9063 return "DW_CFA_expression";
9064 case DW_CFA_offset_extended_sf
:
9065 return "DW_CFA_offset_extended_sf";
9066 case DW_CFA_def_cfa_sf
:
9067 return "DW_CFA_def_cfa_sf";
9068 case DW_CFA_def_cfa_offset_sf
:
9069 return "DW_CFA_def_cfa_offset_sf";
9070 case DW_CFA_val_offset
:
9071 return "DW_CFA_val_offset";
9072 case DW_CFA_val_offset_sf
:
9073 return "DW_CFA_val_offset_sf";
9074 case DW_CFA_val_expression
:
9075 return "DW_CFA_val_expression";
9076 /* SGI/MIPS specific. */
9077 case DW_CFA_MIPS_advance_loc8
:
9078 return "DW_CFA_MIPS_advance_loc8";
9079 /* GNU extensions. */
9080 case DW_CFA_GNU_window_save
:
9081 return "DW_CFA_GNU_window_save";
9082 case DW_CFA_GNU_args_size
:
9083 return "DW_CFA_GNU_args_size";
9084 case DW_CFA_GNU_negative_offset_extended
:
9085 return "DW_CFA_GNU_negative_offset_extended";
9087 return "DW_CFA_<unknown>";
9093 dump_die (struct die_info
*die
)
9097 fprintf_unfiltered (gdb_stderr
, "Die: %s (abbrev = %d, offset = %d)\n",
9098 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
9099 fprintf_unfiltered (gdb_stderr
, "\thas children: %s\n",
9100 dwarf_bool_name (die
->child
!= NULL
));
9102 fprintf_unfiltered (gdb_stderr
, "\tattributes:\n");
9103 for (i
= 0; i
< die
->num_attrs
; ++i
)
9105 fprintf_unfiltered (gdb_stderr
, "\t\t%s (%s) ",
9106 dwarf_attr_name (die
->attrs
[i
].name
),
9107 dwarf_form_name (die
->attrs
[i
].form
));
9108 switch (die
->attrs
[i
].form
)
9110 case DW_FORM_ref_addr
:
9112 fprintf_unfiltered (gdb_stderr
, "address: ");
9113 fputs_filtered (paddress (DW_ADDR (&die
->attrs
[i
])), gdb_stderr
);
9115 case DW_FORM_block2
:
9116 case DW_FORM_block4
:
9118 case DW_FORM_block1
:
9119 fprintf_unfiltered (gdb_stderr
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
9124 fprintf_unfiltered (gdb_stderr
, "constant ref: %ld (adjusted)",
9125 (long) (DW_ADDR (&die
->attrs
[i
])));
9133 fprintf_unfiltered (gdb_stderr
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
9135 case DW_FORM_string
:
9137 fprintf_unfiltered (gdb_stderr
, "string: \"%s\"",
9138 DW_STRING (&die
->attrs
[i
])
9139 ? DW_STRING (&die
->attrs
[i
]) : "");
9142 if (DW_UNSND (&die
->attrs
[i
]))
9143 fprintf_unfiltered (gdb_stderr
, "flag: TRUE");
9145 fprintf_unfiltered (gdb_stderr
, "flag: FALSE");
9147 case DW_FORM_indirect
:
9148 /* the reader will have reduced the indirect form to
9149 the "base form" so this form should not occur */
9150 fprintf_unfiltered (gdb_stderr
, "unexpected attribute form: DW_FORM_indirect");
9153 fprintf_unfiltered (gdb_stderr
, "unsupported attribute form: %d.",
9154 die
->attrs
[i
].form
);
9156 fprintf_unfiltered (gdb_stderr
, "\n");
9161 dump_die_list (struct die_info
*die
)
9166 if (die
->child
!= NULL
)
9167 dump_die_list (die
->child
);
9168 if (die
->sibling
!= NULL
)
9169 dump_die_list (die
->sibling
);
9174 store_in_ref_table (unsigned int offset
, struct die_info
*die
,
9175 struct dwarf2_cu
*cu
)
9178 struct die_info
*old
;
9180 h
= (offset
% REF_HASH_SIZE
);
9181 old
= cu
->die_ref_table
[h
];
9182 die
->next_ref
= old
;
9183 cu
->die_ref_table
[h
] = die
;
9187 dwarf2_get_ref_die_offset (struct attribute
*attr
, struct dwarf2_cu
*cu
)
9189 unsigned int result
= 0;
9193 case DW_FORM_ref_addr
:
9198 case DW_FORM_ref_udata
:
9199 result
= DW_ADDR (attr
);
9202 complaint (&symfile_complaints
,
9203 _("unsupported die ref attribute form: '%s'"),
9204 dwarf_form_name (attr
->form
));
9209 /* Return the constant value held by the given attribute. Return -1
9210 if the value held by the attribute is not constant. */
9213 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
9215 if (attr
->form
== DW_FORM_sdata
)
9216 return DW_SND (attr
);
9217 else if (attr
->form
== DW_FORM_udata
9218 || attr
->form
== DW_FORM_data1
9219 || attr
->form
== DW_FORM_data2
9220 || attr
->form
== DW_FORM_data4
9221 || attr
->form
== DW_FORM_data8
)
9222 return DW_UNSND (attr
);
9225 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
9226 dwarf_form_name (attr
->form
));
9227 return default_value
;
9231 static struct die_info
*
9232 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
9233 struct dwarf2_cu
*cu
)
9235 struct die_info
*die
;
9236 unsigned int offset
;
9238 struct die_info temp_die
;
9239 struct dwarf2_cu
*target_cu
;
9241 offset
= dwarf2_get_ref_die_offset (attr
, cu
);
9243 if (DW_ADDR (attr
) < cu
->header
.offset
9244 || DW_ADDR (attr
) >= cu
->header
.offset
+ cu
->header
.length
)
9246 struct dwarf2_per_cu_data
*per_cu
;
9247 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (attr
),
9249 target_cu
= per_cu
->cu
;
9254 h
= (offset
% REF_HASH_SIZE
);
9255 die
= target_cu
->die_ref_table
[h
];
9258 if (die
->offset
== offset
)
9260 die
= die
->next_ref
;
9263 error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE "
9264 "at 0x%lx [in module %s]"),
9265 (long) src_die
->offset
, (long) offset
, cu
->objfile
->name
);
9270 /* Decode simple location descriptions.
9271 Given a pointer to a dwarf block that defines a location, compute
9272 the location and return the value.
9274 NOTE drow/2003-11-18: This function is called in two situations
9275 now: for the address of static or global variables (partial symbols
9276 only) and for offsets into structures which are expected to be
9277 (more or less) constant. The partial symbol case should go away,
9278 and only the constant case should remain. That will let this
9279 function complain more accurately. A few special modes are allowed
9280 without complaint for global variables (for instance, global
9281 register values and thread-local values).
9283 A location description containing no operations indicates that the
9284 object is optimized out. The return value is 0 for that case.
9285 FIXME drow/2003-11-16: No callers check for this case any more; soon all
9286 callers will only want a very basic result and this can become a
9289 Note that stack[0] is unused except as a default error return.
9290 Note that stack overflow is not yet handled. */
9293 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
9295 struct objfile
*objfile
= cu
->objfile
;
9296 struct comp_unit_head
*cu_header
= &cu
->header
;
9298 int size
= blk
->size
;
9299 gdb_byte
*data
= blk
->data
;
9300 CORE_ADDR stack
[64];
9302 unsigned int bytes_read
, unsnd
;
9346 stack
[++stacki
] = op
- DW_OP_lit0
;
9381 stack
[++stacki
] = op
- DW_OP_reg0
;
9383 dwarf2_complex_location_expr_complaint ();
9387 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9389 stack
[++stacki
] = unsnd
;
9391 dwarf2_complex_location_expr_complaint ();
9395 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
9401 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
9406 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
9411 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
9416 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
9421 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
9426 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
9431 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
9437 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
9442 stack
[stacki
+ 1] = stack
[stacki
];
9447 stack
[stacki
- 1] += stack
[stacki
];
9451 case DW_OP_plus_uconst
:
9452 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9457 stack
[stacki
- 1] -= stack
[stacki
];
9462 /* If we're not the last op, then we definitely can't encode
9463 this using GDB's address_class enum. This is valid for partial
9464 global symbols, although the variable's address will be bogus
9467 dwarf2_complex_location_expr_complaint ();
9470 case DW_OP_GNU_push_tls_address
:
9471 /* The top of the stack has the offset from the beginning
9472 of the thread control block at which the variable is located. */
9473 /* Nothing should follow this operator, so the top of stack would
9475 /* This is valid for partial global symbols, but the variable's
9476 address will be bogus in the psymtab. */
9478 dwarf2_complex_location_expr_complaint ();
9481 case DW_OP_GNU_uninit
:
9485 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
9486 dwarf_stack_op_name (op
));
9487 return (stack
[stacki
]);
9490 return (stack
[stacki
]);
9493 /* memory allocation interface */
9495 static struct dwarf_block
*
9496 dwarf_alloc_block (struct dwarf2_cu
*cu
)
9498 struct dwarf_block
*blk
;
9500 blk
= (struct dwarf_block
*)
9501 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
9505 static struct abbrev_info
*
9506 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
9508 struct abbrev_info
*abbrev
;
9510 abbrev
= (struct abbrev_info
*)
9511 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
9512 memset (abbrev
, 0, sizeof (struct abbrev_info
));
9516 static struct die_info
*
9517 dwarf_alloc_die (void)
9519 struct die_info
*die
;
9521 die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
9522 memset (die
, 0, sizeof (struct die_info
));
9527 /* Macro support. */
9530 /* Return the full name of file number I in *LH's file name table.
9531 Use COMP_DIR as the name of the current directory of the
9532 compilation. The result is allocated using xmalloc; the caller is
9533 responsible for freeing it. */
9535 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
9537 /* Is the file number a valid index into the line header's file name
9538 table? Remember that file numbers start with one, not zero. */
9539 if (1 <= file
&& file
<= lh
->num_file_names
)
9541 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
9543 if (IS_ABSOLUTE_PATH (fe
->name
))
9544 return xstrdup (fe
->name
);
9552 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9558 dir_len
= strlen (dir
);
9559 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
9560 strcpy (full_name
, dir
);
9561 full_name
[dir_len
] = '/';
9562 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
9566 return xstrdup (fe
->name
);
9571 /* The compiler produced a bogus file number. We can at least
9572 record the macro definitions made in the file, even if we
9573 won't be able to find the file by name. */
9575 sprintf (fake_name
, "<bad macro file number %d>", file
);
9577 complaint (&symfile_complaints
,
9578 _("bad file number in macro information (%d)"),
9581 return xstrdup (fake_name
);
9586 static struct macro_source_file
*
9587 macro_start_file (int file
, int line
,
9588 struct macro_source_file
*current_file
,
9589 const char *comp_dir
,
9590 struct line_header
*lh
, struct objfile
*objfile
)
9592 /* The full name of this source file. */
9593 char *full_name
= file_full_name (file
, lh
, comp_dir
);
9595 /* We don't create a macro table for this compilation unit
9596 at all until we actually get a filename. */
9597 if (! pending_macros
)
9598 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
9599 objfile
->macro_cache
);
9602 /* If we have no current file, then this must be the start_file
9603 directive for the compilation unit's main source file. */
9604 current_file
= macro_set_main (pending_macros
, full_name
);
9606 current_file
= macro_include (current_file
, line
, full_name
);
9610 return current_file
;
9614 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
9615 followed by a null byte. */
9617 copy_string (const char *buf
, int len
)
9619 char *s
= xmalloc (len
+ 1);
9620 memcpy (s
, buf
, len
);
9628 consume_improper_spaces (const char *p
, const char *body
)
9632 complaint (&symfile_complaints
,
9633 _("macro definition contains spaces in formal argument list:\n`%s'"),
9645 parse_macro_definition (struct macro_source_file
*file
, int line
,
9650 /* The body string takes one of two forms. For object-like macro
9651 definitions, it should be:
9653 <macro name> " " <definition>
9655 For function-like macro definitions, it should be:
9657 <macro name> "() " <definition>
9659 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
9661 Spaces may appear only where explicitly indicated, and in the
9664 The Dwarf 2 spec says that an object-like macro's name is always
9665 followed by a space, but versions of GCC around March 2002 omit
9666 the space when the macro's definition is the empty string.
9668 The Dwarf 2 spec says that there should be no spaces between the
9669 formal arguments in a function-like macro's formal argument list,
9670 but versions of GCC around March 2002 include spaces after the
9674 /* Find the extent of the macro name. The macro name is terminated
9675 by either a space or null character (for an object-like macro) or
9676 an opening paren (for a function-like macro). */
9677 for (p
= body
; *p
; p
++)
9678 if (*p
== ' ' || *p
== '(')
9681 if (*p
== ' ' || *p
== '\0')
9683 /* It's an object-like macro. */
9684 int name_len
= p
- body
;
9685 char *name
= copy_string (body
, name_len
);
9686 const char *replacement
;
9689 replacement
= body
+ name_len
+ 1;
9692 dwarf2_macro_malformed_definition_complaint (body
);
9693 replacement
= body
+ name_len
;
9696 macro_define_object (file
, line
, name
, replacement
);
9702 /* It's a function-like macro. */
9703 char *name
= copy_string (body
, p
- body
);
9706 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
9710 p
= consume_improper_spaces (p
, body
);
9712 /* Parse the formal argument list. */
9713 while (*p
&& *p
!= ')')
9715 /* Find the extent of the current argument name. */
9716 const char *arg_start
= p
;
9718 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
9721 if (! *p
|| p
== arg_start
)
9722 dwarf2_macro_malformed_definition_complaint (body
);
9725 /* Make sure argv has room for the new argument. */
9726 if (argc
>= argv_size
)
9729 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
9732 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
9735 p
= consume_improper_spaces (p
, body
);
9737 /* Consume the comma, if present. */
9742 p
= consume_improper_spaces (p
, body
);
9751 /* Perfectly formed definition, no complaints. */
9752 macro_define_function (file
, line
, name
,
9753 argc
, (const char **) argv
,
9755 else if (*p
== '\0')
9757 /* Complain, but do define it. */
9758 dwarf2_macro_malformed_definition_complaint (body
);
9759 macro_define_function (file
, line
, name
,
9760 argc
, (const char **) argv
,
9764 /* Just complain. */
9765 dwarf2_macro_malformed_definition_complaint (body
);
9768 /* Just complain. */
9769 dwarf2_macro_malformed_definition_complaint (body
);
9775 for (i
= 0; i
< argc
; i
++)
9781 dwarf2_macro_malformed_definition_complaint (body
);
9786 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
9787 char *comp_dir
, bfd
*abfd
,
9788 struct dwarf2_cu
*cu
)
9790 gdb_byte
*mac_ptr
, *mac_end
;
9791 struct macro_source_file
*current_file
= 0;
9793 if (dwarf2_per_objfile
->macinfo_buffer
== NULL
)
9795 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
9799 mac_ptr
= dwarf2_per_objfile
->macinfo_buffer
+ offset
;
9800 mac_end
= dwarf2_per_objfile
->macinfo_buffer
9801 + dwarf2_per_objfile
->macinfo_size
;
9805 enum dwarf_macinfo_record_type macinfo_type
;
9807 /* Do we at least have room for a macinfo type byte? */
9808 if (mac_ptr
>= mac_end
)
9810 dwarf2_macros_too_long_complaint ();
9814 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
9817 switch (macinfo_type
)
9819 /* A zero macinfo type indicates the end of the macro
9824 case DW_MACINFO_define
:
9825 case DW_MACINFO_undef
:
9827 unsigned int bytes_read
;
9831 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9832 mac_ptr
+= bytes_read
;
9833 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
9834 mac_ptr
+= bytes_read
;
9837 complaint (&symfile_complaints
,
9838 _("debug info gives macro %s outside of any file: %s"),
9840 DW_MACINFO_define
? "definition" : macinfo_type
==
9841 DW_MACINFO_undef
? "undefinition" :
9842 "something-or-other", body
);
9845 if (macinfo_type
== DW_MACINFO_define
)
9846 parse_macro_definition (current_file
, line
, body
);
9847 else if (macinfo_type
== DW_MACINFO_undef
)
9848 macro_undef (current_file
, line
, body
);
9853 case DW_MACINFO_start_file
:
9855 unsigned int bytes_read
;
9858 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9859 mac_ptr
+= bytes_read
;
9860 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9861 mac_ptr
+= bytes_read
;
9863 current_file
= macro_start_file (file
, line
,
9864 current_file
, comp_dir
,
9869 case DW_MACINFO_end_file
:
9871 complaint (&symfile_complaints
,
9872 _("macro debug info has an unmatched `close_file' directive"));
9875 current_file
= current_file
->included_by
;
9878 enum dwarf_macinfo_record_type next_type
;
9880 /* GCC circa March 2002 doesn't produce the zero
9881 type byte marking the end of the compilation
9882 unit. Complain if it's not there, but exit no
9885 /* Do we at least have room for a macinfo type byte? */
9886 if (mac_ptr
>= mac_end
)
9888 dwarf2_macros_too_long_complaint ();
9892 /* We don't increment mac_ptr here, so this is just
9894 next_type
= read_1_byte (abfd
, mac_ptr
);
9896 complaint (&symfile_complaints
,
9897 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
9904 case DW_MACINFO_vendor_ext
:
9906 unsigned int bytes_read
;
9910 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9911 mac_ptr
+= bytes_read
;
9912 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
9913 mac_ptr
+= bytes_read
;
9915 /* We don't recognize any vendor extensions. */
9922 /* Check if the attribute's form is a DW_FORM_block*
9923 if so return true else false. */
9925 attr_form_is_block (struct attribute
*attr
)
9927 return (attr
== NULL
? 0 :
9928 attr
->form
== DW_FORM_block1
9929 || attr
->form
== DW_FORM_block2
9930 || attr
->form
== DW_FORM_block4
9931 || attr
->form
== DW_FORM_block
);
9934 /* Return non-zero if ATTR's value is a section offset --- classes
9935 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
9936 You may use DW_UNSND (attr) to retrieve such offsets.
9938 Section 7.5.4, "Attribute Encodings", explains that no attribute
9939 may have a value that belongs to more than one of these classes; it
9940 would be ambiguous if we did, because we use the same forms for all
9943 attr_form_is_section_offset (struct attribute
*attr
)
9945 return (attr
->form
== DW_FORM_data4
9946 || attr
->form
== DW_FORM_data8
);
9950 /* Return non-zero if ATTR's value falls in the 'constant' class, or
9951 zero otherwise. When this function returns true, you can apply
9952 dwarf2_get_attr_constant_value to it.
9954 However, note that for some attributes you must check
9955 attr_form_is_section_offset before using this test. DW_FORM_data4
9956 and DW_FORM_data8 are members of both the constant class, and of
9957 the classes that contain offsets into other debug sections
9958 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
9959 that, if an attribute's can be either a constant or one of the
9960 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
9961 taken as section offsets, not constants. */
9963 attr_form_is_constant (struct attribute
*attr
)
9980 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
9981 struct dwarf2_cu
*cu
)
9983 if (attr_form_is_section_offset (attr
)
9984 /* ".debug_loc" may not exist at all, or the offset may be outside
9985 the section. If so, fall through to the complaint in the
9987 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc_size
)
9989 struct dwarf2_loclist_baton
*baton
;
9991 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9992 sizeof (struct dwarf2_loclist_baton
));
9993 baton
->per_cu
= cu
->per_cu
;
9994 gdb_assert (baton
->per_cu
);
9996 /* We don't know how long the location list is, but make sure we
9997 don't run off the edge of the section. */
9998 baton
->size
= dwarf2_per_objfile
->loc_size
- DW_UNSND (attr
);
9999 baton
->data
= dwarf2_per_objfile
->loc_buffer
+ DW_UNSND (attr
);
10000 baton
->base_address
= cu
->header
.base_address
;
10001 if (cu
->header
.base_known
== 0)
10002 complaint (&symfile_complaints
,
10003 _("Location list used without specifying the CU base address."));
10005 SYMBOL_OPS (sym
) = &dwarf2_loclist_funcs
;
10006 SYMBOL_LOCATION_BATON (sym
) = baton
;
10010 struct dwarf2_locexpr_baton
*baton
;
10012 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
10013 sizeof (struct dwarf2_locexpr_baton
));
10014 baton
->per_cu
= cu
->per_cu
;
10015 gdb_assert (baton
->per_cu
);
10017 if (attr_form_is_block (attr
))
10019 /* Note that we're just copying the block's data pointer
10020 here, not the actual data. We're still pointing into the
10021 info_buffer for SYM's objfile; right now we never release
10022 that buffer, but when we do clean up properly this may
10024 baton
->size
= DW_BLOCK (attr
)->size
;
10025 baton
->data
= DW_BLOCK (attr
)->data
;
10029 dwarf2_invalid_attrib_class_complaint ("location description",
10030 SYMBOL_NATURAL_NAME (sym
));
10032 baton
->data
= NULL
;
10035 SYMBOL_OPS (sym
) = &dwarf2_locexpr_funcs
;
10036 SYMBOL_LOCATION_BATON (sym
) = baton
;
10040 /* Return the OBJFILE associated with the compilation unit CU. */
10043 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
10045 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
10047 /* Return the master objfile, so that we can report and look up the
10048 correct file containing this variable. */
10049 if (objfile
->separate_debug_objfile_backlink
)
10050 objfile
= objfile
->separate_debug_objfile_backlink
;
10055 /* Return the address size given in the compilation unit header for CU. */
10058 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
10061 return per_cu
->cu
->header
.addr_size
;
10064 /* If the CU is not currently read in, we re-read its header. */
10065 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
10066 struct dwarf2_per_objfile
*per_objfile
10067 = objfile_data (objfile
, dwarf2_objfile_data_key
);
10068 gdb_byte
*info_ptr
= per_objfile
->info_buffer
+ per_cu
->offset
;
10070 struct comp_unit_head cu_header
;
10071 memset (&cu_header
, 0, sizeof cu_header
);
10072 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
10073 return cu_header
.addr_size
;
10077 /* Locate the compilation unit from CU's objfile which contains the
10078 DIE at OFFSET. Raises an error on failure. */
10080 static struct dwarf2_per_cu_data
*
10081 dwarf2_find_containing_comp_unit (unsigned long offset
,
10082 struct objfile
*objfile
)
10084 struct dwarf2_per_cu_data
*this_cu
;
10088 high
= dwarf2_per_objfile
->n_comp_units
- 1;
10091 int mid
= low
+ (high
- low
) / 2;
10092 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
10097 gdb_assert (low
== high
);
10098 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
10101 error (_("Dwarf Error: could not find partial DIE containing "
10102 "offset 0x%lx [in module %s]"),
10103 (long) offset
, bfd_get_filename (objfile
->obfd
));
10105 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
10106 return dwarf2_per_objfile
->all_comp_units
[low
-1];
10110 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
10111 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
10112 && offset
>= this_cu
->offset
+ this_cu
->length
)
10113 error (_("invalid dwarf2 offset %ld"), offset
);
10114 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
10119 /* Locate the compilation unit from OBJFILE which is located at exactly
10120 OFFSET. Raises an error on failure. */
10122 static struct dwarf2_per_cu_data
*
10123 dwarf2_find_comp_unit (unsigned long offset
, struct objfile
*objfile
)
10125 struct dwarf2_per_cu_data
*this_cu
;
10126 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
10127 if (this_cu
->offset
!= offset
)
10128 error (_("no compilation unit with offset %ld."), offset
);
10132 /* Release one cached compilation unit, CU. We unlink it from the tree
10133 of compilation units, but we don't remove it from the read_in_chain;
10134 the caller is responsible for that. */
10137 free_one_comp_unit (void *data
)
10139 struct dwarf2_cu
*cu
= data
;
10141 if (cu
->per_cu
!= NULL
)
10142 cu
->per_cu
->cu
= NULL
;
10145 obstack_free (&cu
->comp_unit_obstack
, NULL
);
10147 free_die_list (cu
->dies
);
10152 /* This cleanup function is passed the address of a dwarf2_cu on the stack
10153 when we're finished with it. We can't free the pointer itself, but be
10154 sure to unlink it from the cache. Also release any associated storage
10155 and perform cache maintenance.
10157 Only used during partial symbol parsing. */
10160 free_stack_comp_unit (void *data
)
10162 struct dwarf2_cu
*cu
= data
;
10164 obstack_free (&cu
->comp_unit_obstack
, NULL
);
10165 cu
->partial_dies
= NULL
;
10167 if (cu
->per_cu
!= NULL
)
10169 /* This compilation unit is on the stack in our caller, so we
10170 should not xfree it. Just unlink it. */
10171 cu
->per_cu
->cu
= NULL
;
10174 /* If we had a per-cu pointer, then we may have other compilation
10175 units loaded, so age them now. */
10176 age_cached_comp_units ();
10180 /* Free all cached compilation units. */
10183 free_cached_comp_units (void *data
)
10185 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
10187 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10188 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10189 while (per_cu
!= NULL
)
10191 struct dwarf2_per_cu_data
*next_cu
;
10193 next_cu
= per_cu
->cu
->read_in_chain
;
10195 free_one_comp_unit (per_cu
->cu
);
10196 *last_chain
= next_cu
;
10202 /* Increase the age counter on each cached compilation unit, and free
10203 any that are too old. */
10206 age_cached_comp_units (void)
10208 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
10210 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
10211 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10212 while (per_cu
!= NULL
)
10214 per_cu
->cu
->last_used
++;
10215 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
10216 dwarf2_mark (per_cu
->cu
);
10217 per_cu
= per_cu
->cu
->read_in_chain
;
10220 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10221 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10222 while (per_cu
!= NULL
)
10224 struct dwarf2_per_cu_data
*next_cu
;
10226 next_cu
= per_cu
->cu
->read_in_chain
;
10228 if (!per_cu
->cu
->mark
)
10230 free_one_comp_unit (per_cu
->cu
);
10231 *last_chain
= next_cu
;
10234 last_chain
= &per_cu
->cu
->read_in_chain
;
10240 /* Remove a single compilation unit from the cache. */
10243 free_one_cached_comp_unit (void *target_cu
)
10245 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
10247 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10248 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10249 while (per_cu
!= NULL
)
10251 struct dwarf2_per_cu_data
*next_cu
;
10253 next_cu
= per_cu
->cu
->read_in_chain
;
10255 if (per_cu
->cu
== target_cu
)
10257 free_one_comp_unit (per_cu
->cu
);
10258 *last_chain
= next_cu
;
10262 last_chain
= &per_cu
->cu
->read_in_chain
;
10268 /* Release all extra memory associated with OBJFILE. */
10271 dwarf2_free_objfile (struct objfile
*objfile
)
10273 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
10275 if (dwarf2_per_objfile
== NULL
)
10278 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
10279 free_cached_comp_units (NULL
);
10281 /* Everything else should be on the objfile obstack. */
10284 /* A pair of DIE offset and GDB type pointer. We store these
10285 in a hash table separate from the DIEs, and preserve them
10286 when the DIEs are flushed out of cache. */
10288 struct dwarf2_offset_and_type
10290 unsigned int offset
;
10294 /* Hash function for a dwarf2_offset_and_type. */
10297 offset_and_type_hash (const void *item
)
10299 const struct dwarf2_offset_and_type
*ofs
= item
;
10300 return ofs
->offset
;
10303 /* Equality function for a dwarf2_offset_and_type. */
10306 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
10308 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
10309 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
10310 return ofs_lhs
->offset
== ofs_rhs
->offset
;
10313 /* Set the type associated with DIE to TYPE. Save it in CU's hash
10314 table if necessary. */
10317 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
10319 struct dwarf2_offset_and_type
**slot
, ofs
;
10323 if (cu
->per_cu
== NULL
)
10326 if (cu
->per_cu
->type_hash
== NULL
)
10327 cu
->per_cu
->type_hash
10328 = htab_create_alloc_ex (cu
->header
.length
/ 24,
10329 offset_and_type_hash
,
10330 offset_and_type_eq
,
10332 &cu
->objfile
->objfile_obstack
,
10333 hashtab_obstack_allocate
,
10334 dummy_obstack_deallocate
);
10336 ofs
.offset
= die
->offset
;
10338 slot
= (struct dwarf2_offset_and_type
**)
10339 htab_find_slot_with_hash (cu
->per_cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
10340 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
10344 /* Find the type for DIE in TYPE_HASH, or return NULL if DIE does not
10345 have a saved type. */
10347 static struct type
*
10348 get_die_type (struct die_info
*die
, htab_t type_hash
)
10350 struct dwarf2_offset_and_type
*slot
, ofs
;
10352 ofs
.offset
= die
->offset
;
10353 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
10360 /* Restore the types of the DIE tree starting at START_DIE from the hash
10361 table saved in CU. */
10364 reset_die_and_siblings_types (struct die_info
*start_die
, struct dwarf2_cu
*cu
)
10366 struct die_info
*die
;
10368 if (cu
->per_cu
->type_hash
== NULL
)
10371 for (die
= start_die
; die
!= NULL
; die
= die
->sibling
)
10373 die
->type
= get_die_type (die
, cu
->per_cu
->type_hash
);
10374 if (die
->child
!= NULL
)
10375 reset_die_and_siblings_types (die
->child
, cu
);
10379 /* Set the mark field in CU and in every other compilation unit in the
10380 cache that we must keep because we are keeping CU. */
10382 /* Add a dependence relationship from CU to REF_PER_CU. */
10385 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
10386 struct dwarf2_per_cu_data
*ref_per_cu
)
10390 if (cu
->dependencies
== NULL
)
10392 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
10393 NULL
, &cu
->comp_unit_obstack
,
10394 hashtab_obstack_allocate
,
10395 dummy_obstack_deallocate
);
10397 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
10399 *slot
= ref_per_cu
;
10402 /* Set the mark field in CU and in every other compilation unit in the
10403 cache that we must keep because we are keeping CU. */
10406 dwarf2_mark_helper (void **slot
, void *data
)
10408 struct dwarf2_per_cu_data
*per_cu
;
10410 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
10411 if (per_cu
->cu
->mark
)
10413 per_cu
->cu
->mark
= 1;
10415 if (per_cu
->cu
->dependencies
!= NULL
)
10416 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10422 dwarf2_mark (struct dwarf2_cu
*cu
)
10427 if (cu
->dependencies
!= NULL
)
10428 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10432 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
10436 per_cu
->cu
->mark
= 0;
10437 per_cu
= per_cu
->cu
->read_in_chain
;
10441 /* Trivial hash function for partial_die_info: the hash value of a DIE
10442 is its offset in .debug_info for this objfile. */
10445 partial_die_hash (const void *item
)
10447 const struct partial_die_info
*part_die
= item
;
10448 return part_die
->offset
;
10451 /* Trivial comparison function for partial_die_info structures: two DIEs
10452 are equal if they have the same offset. */
10455 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
10457 const struct partial_die_info
*part_die_lhs
= item_lhs
;
10458 const struct partial_die_info
*part_die_rhs
= item_rhs
;
10459 return part_die_lhs
->offset
== part_die_rhs
->offset
;
10462 static struct cmd_list_element
*set_dwarf2_cmdlist
;
10463 static struct cmd_list_element
*show_dwarf2_cmdlist
;
10466 set_dwarf2_cmd (char *args
, int from_tty
)
10468 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
10472 show_dwarf2_cmd (char *args
, int from_tty
)
10474 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
10477 void _initialize_dwarf2_read (void);
10480 _initialize_dwarf2_read (void)
10482 dwarf2_objfile_data_key
= register_objfile_data ();
10484 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
10485 Set DWARF 2 specific variables.\n\
10486 Configure DWARF 2 variables such as the cache size"),
10487 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
10488 0/*allow-unknown*/, &maintenance_set_cmdlist
);
10490 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
10491 Show DWARF 2 specific variables\n\
10492 Show DWARF 2 variables such as the cache size"),
10493 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
10494 0/*allow-unknown*/, &maintenance_show_cmdlist
);
10496 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
10497 &dwarf2_max_cache_age
, _("\
10498 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
10499 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
10500 A higher limit means that cached compilation units will be stored\n\
10501 in memory longer, and more total memory will be used. Zero disables\n\
10502 caching, which can slow down startup."),
10504 show_dwarf2_max_cache_age
,
10505 &set_dwarf2_cmdlist
,
10506 &show_dwarf2_cmdlist
);