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 if (die
->child
!= NULL
)
4946 struct die_info
*child_die
;
4950 /* Count the number of parameters.
4951 FIXME: GDB currently ignores vararg functions, but knows about
4952 vararg member functions. */
4953 child_die
= die
->child
;
4954 while (child_die
&& child_die
->tag
)
4956 if (child_die
->tag
== DW_TAG_formal_parameter
)
4958 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
4959 TYPE_FLAGS (ftype
) |= TYPE_FLAG_VARARGS
;
4960 child_die
= sibling_die (child_die
);
4963 /* Allocate storage for parameters and fill them in. */
4964 TYPE_NFIELDS (ftype
) = nparams
;
4965 TYPE_FIELDS (ftype
) = (struct field
*)
4966 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
4968 child_die
= die
->child
;
4969 while (child_die
&& child_die
->tag
)
4971 if (child_die
->tag
== DW_TAG_formal_parameter
)
4973 /* Dwarf2 has no clean way to discern C++ static and non-static
4974 member functions. G++ helps GDB by marking the first
4975 parameter for non-static member functions (which is the
4976 this pointer) as artificial. We pass this information
4977 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
4978 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
4980 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
4982 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
4983 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
4986 child_die
= sibling_die (child_die
);
4990 set_die_type (die
, ftype
, cu
);
4994 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
4996 struct objfile
*objfile
= cu
->objfile
;
4997 struct attribute
*attr
;
5002 name
= dwarf2_name (die
, cu
);
5003 set_die_type (die
, init_type (TYPE_CODE_TYPEDEF
, 0,
5004 TYPE_FLAG_TARGET_STUB
, name
, objfile
),
5006 TYPE_TARGET_TYPE (die
->type
) = die_type (die
, cu
);
5010 /* Find a representation of a given base type and install
5011 it in the TYPE field of the die. */
5014 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5016 struct objfile
*objfile
= cu
->objfile
;
5018 struct attribute
*attr
;
5019 int encoding
= 0, size
= 0;
5021 enum type_code code
= TYPE_CODE_INT
;
5023 struct type
*target_type
= NULL
;
5025 /* If we've already decoded this die, this is a no-op. */
5031 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
5034 encoding
= DW_UNSND (attr
);
5036 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5039 size
= DW_UNSND (attr
);
5041 name
= dwarf2_name (die
, cu
);
5044 complaint (&symfile_complaints
,
5045 _("DW_AT_name missing from DW_TAG_base_type"));
5050 case DW_ATE_address
:
5051 /* Turn DW_ATE_address into a void * pointer. */
5052 code
= TYPE_CODE_PTR
;
5053 type_flags
|= TYPE_FLAG_UNSIGNED
;
5054 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
5056 case DW_ATE_boolean
:
5057 code
= TYPE_CODE_BOOL
;
5058 type_flags
|= TYPE_FLAG_UNSIGNED
;
5060 case DW_ATE_complex_float
:
5061 code
= TYPE_CODE_COMPLEX
;
5062 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
5064 case DW_ATE_decimal_float
:
5065 code
= TYPE_CODE_DECFLOAT
;
5068 code
= TYPE_CODE_FLT
;
5072 case DW_ATE_unsigned
:
5073 type_flags
|= TYPE_FLAG_UNSIGNED
;
5075 case DW_ATE_signed_char
:
5076 if (cu
->language
== language_ada
|| cu
->language
== language_m2
)
5077 code
= TYPE_CODE_CHAR
;
5079 case DW_ATE_unsigned_char
:
5080 if (cu
->language
== language_ada
|| cu
->language
== language_m2
)
5081 code
= TYPE_CODE_CHAR
;
5082 type_flags
|= TYPE_FLAG_UNSIGNED
;
5085 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
5086 dwarf_type_encoding_name (encoding
));
5090 type
= init_type (code
, size
, type_flags
, name
, objfile
);
5091 TYPE_TARGET_TYPE (type
) = target_type
;
5093 set_die_type (die
, type
, cu
);
5096 /* Read the given DW_AT_subrange DIE. */
5099 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5101 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5102 struct type
*base_type
;
5103 struct type
*range_type
;
5104 struct attribute
*attr
;
5109 /* If we have already decoded this die, then nothing more to do. */
5113 base_type
= die_type (die
, cu
);
5114 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
5116 complaint (&symfile_complaints
,
5117 _("DW_AT_type missing from DW_TAG_subrange_type"));
5119 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
5120 0, NULL
, cu
->objfile
);
5123 if (cu
->language
== language_fortran
)
5125 /* FORTRAN implies a lower bound of 1, if not given. */
5129 /* FIXME: For variable sized arrays either of these could be
5130 a variable rather than a constant value. We'll allow it,
5131 but we don't know how to handle it. */
5132 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
5134 low
= dwarf2_get_attr_constant_value (attr
, 0);
5136 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
5139 if (attr
->form
== DW_FORM_block1
)
5141 /* GCC encodes arrays with unspecified or dynamic length
5142 with a DW_FORM_block1 attribute.
5143 FIXME: GDB does not yet know how to handle dynamic
5144 arrays properly, treat them as arrays with unspecified
5147 FIXME: jimb/2003-09-22: GDB does not really know
5148 how to handle arrays of unspecified length
5149 either; we just represent them as zero-length
5150 arrays. Choose an appropriate upper bound given
5151 the lower bound we've computed above. */
5155 high
= dwarf2_get_attr_constant_value (attr
, 1);
5158 range_type
= create_range_type (NULL
, base_type
, low
, high
);
5160 name
= dwarf2_name (die
, cu
);
5162 TYPE_NAME (range_type
) = name
;
5164 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5166 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
5168 set_die_type (die
, range_type
, cu
);
5172 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5179 /* For now, we only support the C meaning of an unspecified type: void. */
5181 type
= init_type (TYPE_CODE_VOID
, 0, 0, dwarf2_name (die
, cu
),
5184 set_die_type (die
, type
, cu
);
5187 /* Read a whole compilation unit into a linked list of dies. */
5189 static struct die_info
*
5190 read_comp_unit (gdb_byte
*info_ptr
, bfd
*abfd
, struct dwarf2_cu
*cu
)
5192 return read_die_and_children (info_ptr
, abfd
, cu
, &info_ptr
, NULL
);
5195 /* Read a single die and all its descendents. Set the die's sibling
5196 field to NULL; set other fields in the die correctly, and set all
5197 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
5198 location of the info_ptr after reading all of those dies. PARENT
5199 is the parent of the die in question. */
5201 static struct die_info
*
5202 read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
5203 struct dwarf2_cu
*cu
,
5204 gdb_byte
**new_info_ptr
,
5205 struct die_info
*parent
)
5207 struct die_info
*die
;
5211 cur_ptr
= read_full_die (&die
, abfd
, info_ptr
, cu
, &has_children
);
5212 store_in_ref_table (die
->offset
, die
, cu
);
5216 die
->child
= read_die_and_siblings (cur_ptr
, abfd
, cu
,
5222 *new_info_ptr
= cur_ptr
;
5225 die
->sibling
= NULL
;
5226 die
->parent
= parent
;
5230 /* Read a die, all of its descendents, and all of its siblings; set
5231 all of the fields of all of the dies correctly. Arguments are as
5232 in read_die_and_children. */
5234 static struct die_info
*
5235 read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
5236 struct dwarf2_cu
*cu
,
5237 gdb_byte
**new_info_ptr
,
5238 struct die_info
*parent
)
5240 struct die_info
*first_die
, *last_sibling
;
5244 first_die
= last_sibling
= NULL
;
5248 struct die_info
*die
5249 = read_die_and_children (cur_ptr
, abfd
, cu
, &cur_ptr
, parent
);
5257 last_sibling
->sibling
= die
;
5262 *new_info_ptr
= cur_ptr
;
5272 /* Free a linked list of dies. */
5275 free_die_list (struct die_info
*dies
)
5277 struct die_info
*die
, *next
;
5282 if (die
->child
!= NULL
)
5283 free_die_list (die
->child
);
5284 next
= die
->sibling
;
5291 /* Decompress a section that was compressed using zlib. Store the
5292 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
5295 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
5296 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
5299 error (_("Support for zlib-compressed DWARF data (from '%s') "
5300 "is disabled in this copy of GDB"),
5301 bfd_get_filename (abfd
));
5303 bfd
*abfd
= objfile
->obfd
;
5304 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
5305 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
5306 bfd_size_type uncompressed_size
;
5307 gdb_byte
*uncompressed_buffer
;
5310 int header_size
= 12;
5312 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
5313 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
5314 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5315 bfd_get_filename (abfd
));
5317 /* Read the zlib header. In this case, it should be "ZLIB" followed
5318 by the uncompressed section size, 8 bytes in big-endian order. */
5319 if (compressed_size
< header_size
5320 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
5321 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
5322 bfd_get_filename (abfd
));
5323 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
5324 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
5325 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
5326 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
5327 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
5328 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
5329 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
5330 uncompressed_size
+= compressed_buffer
[11];
5332 /* It is possible the section consists of several compressed
5333 buffers concatenated together, so we uncompress in a loop. */
5337 strm
.avail_in
= compressed_size
- header_size
;
5338 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
5339 strm
.avail_out
= uncompressed_size
;
5340 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
5342 rc
= inflateInit (&strm
);
5343 while (strm
.avail_in
> 0)
5346 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
5347 bfd_get_filename (abfd
), rc
);
5348 strm
.next_out
= ((Bytef
*) uncompressed_buffer
5349 + (uncompressed_size
- strm
.avail_out
));
5350 rc
= inflate (&strm
, Z_FINISH
);
5351 if (rc
!= Z_STREAM_END
)
5352 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
5353 bfd_get_filename (abfd
), rc
);
5354 rc
= inflateReset (&strm
);
5356 rc
= inflateEnd (&strm
);
5358 || strm
.avail_out
!= 0)
5359 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
5360 bfd_get_filename (abfd
), rc
);
5362 xfree (compressed_buffer
);
5363 *outbuf
= uncompressed_buffer
;
5364 *outsize
= uncompressed_size
;
5369 /* Read the contents of the section at OFFSET and of size SIZE from the
5370 object file specified by OBJFILE into the objfile_obstack and return it.
5371 If the section is compressed, uncompress it before returning. */
5374 dwarf2_read_section (struct objfile
*objfile
, asection
*sectp
)
5376 bfd
*abfd
= objfile
->obfd
;
5377 gdb_byte
*buf
, *retbuf
;
5378 bfd_size_type size
= bfd_get_section_size (sectp
);
5379 unsigned char header
[4];
5384 /* Check if the file has a 4-byte header indicating compression. */
5385 if (size
> sizeof (header
)
5386 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
5387 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
5389 /* Upon decompression, update the buffer and its size. */
5390 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
5392 zlib_decompress_section (objfile
, sectp
, &buf
, &size
);
5393 dwarf2_resize_section (sectp
, size
);
5398 /* If we get here, we are a normal, not-compressed section. */
5399 buf
= obstack_alloc (&objfile
->objfile_obstack
, size
);
5400 /* When debugging .o files, we may need to apply relocations; see
5401 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
5402 We never compress sections in .o files, so we only need to
5403 try this when the section is not compressed. */
5404 retbuf
= symfile_relocate_debug_section (abfd
, sectp
, buf
);
5408 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
5409 || bfd_bread (buf
, size
, abfd
) != size
)
5410 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5411 bfd_get_filename (abfd
));
5416 /* In DWARF version 2, the description of the debugging information is
5417 stored in a separate .debug_abbrev section. Before we read any
5418 dies from a section we read in all abbreviations and install them
5419 in a hash table. This function also sets flags in CU describing
5420 the data found in the abbrev table. */
5423 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
5425 struct comp_unit_head
*cu_header
= &cu
->header
;
5426 gdb_byte
*abbrev_ptr
;
5427 struct abbrev_info
*cur_abbrev
;
5428 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
5429 unsigned int abbrev_form
, hash_number
;
5430 struct attr_abbrev
*cur_attrs
;
5431 unsigned int allocated_attrs
;
5433 /* Initialize dwarf2 abbrevs */
5434 obstack_init (&cu
->abbrev_obstack
);
5435 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
5437 * sizeof (struct abbrev_info
*)));
5438 memset (cu
->dwarf2_abbrevs
, 0,
5439 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
5441 abbrev_ptr
= dwarf2_per_objfile
->abbrev_buffer
+ cu_header
->abbrev_offset
;
5442 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5443 abbrev_ptr
+= bytes_read
;
5445 allocated_attrs
= ATTR_ALLOC_CHUNK
;
5446 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
5448 /* loop until we reach an abbrev number of 0 */
5449 while (abbrev_number
)
5451 cur_abbrev
= dwarf_alloc_abbrev (cu
);
5453 /* read in abbrev header */
5454 cur_abbrev
->number
= abbrev_number
;
5455 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5456 abbrev_ptr
+= bytes_read
;
5457 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
5460 if (cur_abbrev
->tag
== DW_TAG_namespace
)
5461 cu
->has_namespace_info
= 1;
5463 /* now read in declarations */
5464 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5465 abbrev_ptr
+= bytes_read
;
5466 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5467 abbrev_ptr
+= bytes_read
;
5470 if (cur_abbrev
->num_attrs
== allocated_attrs
)
5472 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
5474 = xrealloc (cur_attrs
, (allocated_attrs
5475 * sizeof (struct attr_abbrev
)));
5478 /* Record whether this compilation unit might have
5479 inter-compilation-unit references. If we don't know what form
5480 this attribute will have, then it might potentially be a
5481 DW_FORM_ref_addr, so we conservatively expect inter-CU
5484 if (abbrev_form
== DW_FORM_ref_addr
5485 || abbrev_form
== DW_FORM_indirect
)
5486 cu
->has_form_ref_addr
= 1;
5488 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
5489 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
5490 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5491 abbrev_ptr
+= bytes_read
;
5492 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5493 abbrev_ptr
+= bytes_read
;
5496 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
5497 (cur_abbrev
->num_attrs
5498 * sizeof (struct attr_abbrev
)));
5499 memcpy (cur_abbrev
->attrs
, cur_attrs
,
5500 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
5502 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
5503 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
5504 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
5506 /* Get next abbreviation.
5507 Under Irix6 the abbreviations for a compilation unit are not
5508 always properly terminated with an abbrev number of 0.
5509 Exit loop if we encounter an abbreviation which we have
5510 already read (which means we are about to read the abbreviations
5511 for the next compile unit) or if the end of the abbreviation
5512 table is reached. */
5513 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev_buffer
)
5514 >= dwarf2_per_objfile
->abbrev_size
)
5516 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5517 abbrev_ptr
+= bytes_read
;
5518 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
5525 /* Release the memory used by the abbrev table for a compilation unit. */
5528 dwarf2_free_abbrev_table (void *ptr_to_cu
)
5530 struct dwarf2_cu
*cu
= ptr_to_cu
;
5532 obstack_free (&cu
->abbrev_obstack
, NULL
);
5533 cu
->dwarf2_abbrevs
= NULL
;
5536 /* Lookup an abbrev_info structure in the abbrev hash table. */
5538 static struct abbrev_info
*
5539 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
5541 unsigned int hash_number
;
5542 struct abbrev_info
*abbrev
;
5544 hash_number
= number
% ABBREV_HASH_SIZE
;
5545 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
5549 if (abbrev
->number
== number
)
5552 abbrev
= abbrev
->next
;
5557 /* Returns nonzero if TAG represents a type that we might generate a partial
5561 is_type_tag_for_partial (int tag
)
5566 /* Some types that would be reasonable to generate partial symbols for,
5567 that we don't at present. */
5568 case DW_TAG_array_type
:
5569 case DW_TAG_file_type
:
5570 case DW_TAG_ptr_to_member_type
:
5571 case DW_TAG_set_type
:
5572 case DW_TAG_string_type
:
5573 case DW_TAG_subroutine_type
:
5575 case DW_TAG_base_type
:
5576 case DW_TAG_class_type
:
5577 case DW_TAG_interface_type
:
5578 case DW_TAG_enumeration_type
:
5579 case DW_TAG_structure_type
:
5580 case DW_TAG_subrange_type
:
5581 case DW_TAG_typedef
:
5582 case DW_TAG_union_type
:
5589 /* Load all DIEs that are interesting for partial symbols into memory. */
5591 static struct partial_die_info
*
5592 load_partial_dies (bfd
*abfd
, gdb_byte
*info_ptr
, int building_psymtab
,
5593 struct dwarf2_cu
*cu
)
5595 struct partial_die_info
*part_die
;
5596 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
5597 struct abbrev_info
*abbrev
;
5598 unsigned int bytes_read
;
5599 unsigned int load_all
= 0;
5601 int nesting_level
= 1;
5606 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
5610 = htab_create_alloc_ex (cu
->header
.length
/ 12,
5614 &cu
->comp_unit_obstack
,
5615 hashtab_obstack_allocate
,
5616 dummy_obstack_deallocate
);
5618 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5619 sizeof (struct partial_die_info
));
5623 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
5625 /* A NULL abbrev means the end of a series of children. */
5628 if (--nesting_level
== 0)
5630 /* PART_DIE was probably the last thing allocated on the
5631 comp_unit_obstack, so we could call obstack_free
5632 here. We don't do that because the waste is small,
5633 and will be cleaned up when we're done with this
5634 compilation unit. This way, we're also more robust
5635 against other users of the comp_unit_obstack. */
5638 info_ptr
+= bytes_read
;
5639 last_die
= parent_die
;
5640 parent_die
= parent_die
->die_parent
;
5644 /* Check whether this DIE is interesting enough to save. Normally
5645 we would not be interested in members here, but there may be
5646 later variables referencing them via DW_AT_specification (for
5649 && !is_type_tag_for_partial (abbrev
->tag
)
5650 && abbrev
->tag
!= DW_TAG_enumerator
5651 && abbrev
->tag
!= DW_TAG_subprogram
5652 && abbrev
->tag
!= DW_TAG_variable
5653 && abbrev
->tag
!= DW_TAG_namespace
5654 && abbrev
->tag
!= DW_TAG_member
)
5656 /* Otherwise we skip to the next sibling, if any. */
5657 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
5661 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
,
5662 abfd
, info_ptr
, cu
);
5664 /* This two-pass algorithm for processing partial symbols has a
5665 high cost in cache pressure. Thus, handle some simple cases
5666 here which cover the majority of C partial symbols. DIEs
5667 which neither have specification tags in them, nor could have
5668 specification tags elsewhere pointing at them, can simply be
5669 processed and discarded.
5671 This segment is also optional; scan_partial_symbols and
5672 add_partial_symbol will handle these DIEs if we chain
5673 them in normally. When compilers which do not emit large
5674 quantities of duplicate debug information are more common,
5675 this code can probably be removed. */
5677 /* Any complete simple types at the top level (pretty much all
5678 of them, for a language without namespaces), can be processed
5680 if (parent_die
== NULL
5681 && part_die
->has_specification
== 0
5682 && part_die
->is_declaration
== 0
5683 && (part_die
->tag
== DW_TAG_typedef
5684 || part_die
->tag
== DW_TAG_base_type
5685 || part_die
->tag
== DW_TAG_subrange_type
))
5687 if (building_psymtab
&& part_die
->name
!= NULL
)
5688 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5689 VAR_DOMAIN
, LOC_TYPEDEF
,
5690 &cu
->objfile
->static_psymbols
,
5691 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5692 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5696 /* If we're at the second level, and we're an enumerator, and
5697 our parent has no specification (meaning possibly lives in a
5698 namespace elsewhere), then we can add the partial symbol now
5699 instead of queueing it. */
5700 if (part_die
->tag
== DW_TAG_enumerator
5701 && parent_die
!= NULL
5702 && parent_die
->die_parent
== NULL
5703 && parent_die
->tag
== DW_TAG_enumeration_type
5704 && parent_die
->has_specification
== 0)
5706 if (part_die
->name
== NULL
)
5707 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
5708 else if (building_psymtab
)
5709 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5710 VAR_DOMAIN
, LOC_CONST
,
5711 (cu
->language
== language_cplus
5712 || cu
->language
== language_java
)
5713 ? &cu
->objfile
->global_psymbols
5714 : &cu
->objfile
->static_psymbols
,
5715 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5717 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5721 /* We'll save this DIE so link it in. */
5722 part_die
->die_parent
= parent_die
;
5723 part_die
->die_sibling
= NULL
;
5724 part_die
->die_child
= NULL
;
5726 if (last_die
&& last_die
== parent_die
)
5727 last_die
->die_child
= part_die
;
5729 last_die
->die_sibling
= part_die
;
5731 last_die
= part_die
;
5733 if (first_die
== NULL
)
5734 first_die
= part_die
;
5736 /* Maybe add the DIE to the hash table. Not all DIEs that we
5737 find interesting need to be in the hash table, because we
5738 also have the parent/sibling/child chains; only those that we
5739 might refer to by offset later during partial symbol reading.
5741 For now this means things that might have be the target of a
5742 DW_AT_specification, DW_AT_abstract_origin, or
5743 DW_AT_extension. DW_AT_extension will refer only to
5744 namespaces; DW_AT_abstract_origin refers to functions (and
5745 many things under the function DIE, but we do not recurse
5746 into function DIEs during partial symbol reading) and
5747 possibly variables as well; DW_AT_specification refers to
5748 declarations. Declarations ought to have the DW_AT_declaration
5749 flag. It happens that GCC forgets to put it in sometimes, but
5750 only for functions, not for types.
5752 Adding more things than necessary to the hash table is harmless
5753 except for the performance cost. Adding too few will result in
5754 wasted time in find_partial_die, when we reread the compilation
5755 unit with load_all_dies set. */
5758 || abbrev
->tag
== DW_TAG_subprogram
5759 || abbrev
->tag
== DW_TAG_variable
5760 || abbrev
->tag
== DW_TAG_namespace
5761 || part_die
->is_declaration
)
5765 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
5766 part_die
->offset
, INSERT
);
5770 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5771 sizeof (struct partial_die_info
));
5773 /* For some DIEs we want to follow their children (if any). For C
5774 we have no reason to follow the children of structures; for other
5775 languages we have to, both so that we can get at method physnames
5776 to infer fully qualified class names, and for DW_AT_specification. */
5777 if (last_die
->has_children
5779 || last_die
->tag
== DW_TAG_namespace
5780 || last_die
->tag
== DW_TAG_enumeration_type
5781 || (cu
->language
!= language_c
5782 && (last_die
->tag
== DW_TAG_class_type
5783 || last_die
->tag
== DW_TAG_interface_type
5784 || last_die
->tag
== DW_TAG_structure_type
5785 || last_die
->tag
== DW_TAG_union_type
))))
5788 parent_die
= last_die
;
5792 /* Otherwise we skip to the next sibling, if any. */
5793 info_ptr
= locate_pdi_sibling (last_die
, info_ptr
, abfd
, cu
);
5795 /* Back to the top, do it again. */
5799 /* Read a minimal amount of information into the minimal die structure. */
5802 read_partial_die (struct partial_die_info
*part_die
,
5803 struct abbrev_info
*abbrev
,
5804 unsigned int abbrev_len
, bfd
*abfd
,
5805 gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
5807 unsigned int bytes_read
, i
;
5808 struct attribute attr
;
5809 int has_low_pc_attr
= 0;
5810 int has_high_pc_attr
= 0;
5812 memset (part_die
, 0, sizeof (struct partial_die_info
));
5814 part_die
->offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5816 info_ptr
+= abbrev_len
;
5821 part_die
->tag
= abbrev
->tag
;
5822 part_die
->has_children
= abbrev
->has_children
;
5824 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5826 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
5828 /* Store the data if it is of an attribute we want to keep in a
5829 partial symbol table. */
5834 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
5835 if (part_die
->name
== NULL
)
5836 part_die
->name
= DW_STRING (&attr
);
5838 case DW_AT_comp_dir
:
5839 if (part_die
->dirname
== NULL
)
5840 part_die
->dirname
= DW_STRING (&attr
);
5842 case DW_AT_MIPS_linkage_name
:
5843 part_die
->name
= DW_STRING (&attr
);
5846 has_low_pc_attr
= 1;
5847 part_die
->lowpc
= DW_ADDR (&attr
);
5850 has_high_pc_attr
= 1;
5851 part_die
->highpc
= DW_ADDR (&attr
);
5854 if (dwarf2_ranges_read (DW_UNSND (&attr
), &part_die
->lowpc
,
5855 &part_die
->highpc
, cu
))
5856 has_low_pc_attr
= has_high_pc_attr
= 1;
5858 case DW_AT_location
:
5859 /* Support the .debug_loc offsets */
5860 if (attr_form_is_block (&attr
))
5862 part_die
->locdesc
= DW_BLOCK (&attr
);
5864 else if (attr_form_is_section_offset (&attr
))
5866 dwarf2_complex_location_expr_complaint ();
5870 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5871 "partial symbol information");
5874 case DW_AT_language
:
5875 part_die
->language
= DW_UNSND (&attr
);
5877 case DW_AT_external
:
5878 part_die
->is_external
= DW_UNSND (&attr
);
5880 case DW_AT_declaration
:
5881 part_die
->is_declaration
= DW_UNSND (&attr
);
5884 part_die
->has_type
= 1;
5886 case DW_AT_abstract_origin
:
5887 case DW_AT_specification
:
5888 case DW_AT_extension
:
5889 part_die
->has_specification
= 1;
5890 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
, cu
);
5893 /* Ignore absolute siblings, they might point outside of
5894 the current compile unit. */
5895 if (attr
.form
== DW_FORM_ref_addr
)
5896 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
5898 part_die
->sibling
= dwarf2_per_objfile
->info_buffer
5899 + dwarf2_get_ref_die_offset (&attr
, cu
);
5901 case DW_AT_stmt_list
:
5902 part_die
->has_stmt_list
= 1;
5903 part_die
->line_offset
= DW_UNSND (&attr
);
5905 case DW_AT_byte_size
:
5906 part_die
->has_byte_size
= 1;
5908 case DW_AT_calling_convention
:
5909 /* DWARF doesn't provide a way to identify a program's source-level
5910 entry point. DW_AT_calling_convention attributes are only meant
5911 to describe functions' calling conventions.
5913 However, because it's a necessary piece of information in
5914 Fortran, and because DW_CC_program is the only piece of debugging
5915 information whose definition refers to a 'main program' at all,
5916 several compilers have begun marking Fortran main programs with
5917 DW_CC_program --- even when those functions use the standard
5918 calling conventions.
5920 So until DWARF specifies a way to provide this information and
5921 compilers pick up the new representation, we'll support this
5923 if (DW_UNSND (&attr
) == DW_CC_program
5924 && cu
->language
== language_fortran
)
5925 set_main_name (part_die
->name
);
5932 /* When using the GNU linker, .gnu.linkonce. sections are used to
5933 eliminate duplicate copies of functions and vtables and such.
5934 The linker will arbitrarily choose one and discard the others.
5935 The AT_*_pc values for such functions refer to local labels in
5936 these sections. If the section from that file was discarded, the
5937 labels are not in the output, so the relocs get a value of 0.
5938 If this is a discarded function, mark the pc bounds as invalid,
5939 so that GDB will ignore it. */
5940 if (has_low_pc_attr
&& has_high_pc_attr
5941 && part_die
->lowpc
< part_die
->highpc
5942 && (part_die
->lowpc
!= 0
5943 || dwarf2_per_objfile
->has_section_at_zero
))
5944 part_die
->has_pc_info
= 1;
5948 /* Find a cached partial DIE at OFFSET in CU. */
5950 static struct partial_die_info
*
5951 find_partial_die_in_comp_unit (unsigned long offset
, struct dwarf2_cu
*cu
)
5953 struct partial_die_info
*lookup_die
= NULL
;
5954 struct partial_die_info part_die
;
5956 part_die
.offset
= offset
;
5957 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
5962 /* Find a partial DIE at OFFSET, which may or may not be in CU. */
5964 static struct partial_die_info
*
5965 find_partial_die (unsigned long offset
, struct dwarf2_cu
*cu
)
5967 struct dwarf2_per_cu_data
*per_cu
= NULL
;
5968 struct partial_die_info
*pd
= NULL
;
5970 if (offset
>= cu
->header
.offset
5971 && offset
< cu
->header
.offset
+ cu
->header
.length
)
5973 pd
= find_partial_die_in_comp_unit (offset
, cu
);
5978 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
5980 if (per_cu
->cu
== NULL
)
5982 load_comp_unit (per_cu
, cu
->objfile
);
5983 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5984 dwarf2_per_objfile
->read_in_chain
= per_cu
;
5987 per_cu
->cu
->last_used
= 0;
5988 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5990 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
5992 struct cleanup
*back_to
;
5993 struct partial_die_info comp_unit_die
;
5994 struct abbrev_info
*abbrev
;
5995 unsigned int bytes_read
;
5998 per_cu
->load_all_dies
= 1;
6000 /* Re-read the DIEs. */
6001 back_to
= make_cleanup (null_cleanup
, 0);
6002 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
6004 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
6005 back_to
= make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
6007 info_ptr
= per_cu
->cu
->header
.first_die_ptr
;
6008 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
6009 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
6010 per_cu
->cu
->objfile
->obfd
, info_ptr
,
6012 if (comp_unit_die
.has_children
)
6013 load_partial_dies (per_cu
->cu
->objfile
->obfd
, info_ptr
, 0, per_cu
->cu
);
6014 do_cleanups (back_to
);
6016 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6020 internal_error (__FILE__
, __LINE__
,
6021 _("could not find partial DIE 0x%lx in cache [from module %s]\n"),
6022 offset
, bfd_get_filename (cu
->objfile
->obfd
));
6026 /* Adjust PART_DIE before generating a symbol for it. This function
6027 may set the is_external flag or change the DIE's name. */
6030 fixup_partial_die (struct partial_die_info
*part_die
,
6031 struct dwarf2_cu
*cu
)
6033 /* If we found a reference attribute and the DIE has no name, try
6034 to find a name in the referred to DIE. */
6036 if (part_die
->name
== NULL
&& part_die
->has_specification
)
6038 struct partial_die_info
*spec_die
;
6040 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
6042 fixup_partial_die (spec_die
, cu
);
6046 part_die
->name
= spec_die
->name
;
6048 /* Copy DW_AT_external attribute if it is set. */
6049 if (spec_die
->is_external
)
6050 part_die
->is_external
= spec_die
->is_external
;
6054 /* Set default names for some unnamed DIEs. */
6055 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
6056 || part_die
->tag
== DW_TAG_class_type
))
6057 part_die
->name
= "(anonymous class)";
6059 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
6060 part_die
->name
= "(anonymous namespace)";
6062 if (part_die
->tag
== DW_TAG_structure_type
6063 || part_die
->tag
== DW_TAG_class_type
6064 || part_die
->tag
== DW_TAG_union_type
)
6065 guess_structure_name (part_die
, cu
);
6068 /* Read the die from the .debug_info section buffer. Set DIEP to
6069 point to a newly allocated die with its information, except for its
6070 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6071 whether the die has children or not. */
6074 read_full_die (struct die_info
**diep
, bfd
*abfd
, gdb_byte
*info_ptr
,
6075 struct dwarf2_cu
*cu
, int *has_children
)
6077 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6078 struct abbrev_info
*abbrev
;
6079 struct die_info
*die
;
6081 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
6082 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6083 info_ptr
+= bytes_read
;
6086 die
= dwarf_alloc_die ();
6088 die
->abbrev
= abbrev_number
;
6095 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6098 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6100 bfd_get_filename (abfd
));
6102 die
= dwarf_alloc_die ();
6103 die
->offset
= offset
;
6104 die
->tag
= abbrev
->tag
;
6105 die
->abbrev
= abbrev_number
;
6108 die
->num_attrs
= abbrev
->num_attrs
;
6109 die
->attrs
= (struct attribute
*)
6110 xmalloc (die
->num_attrs
* sizeof (struct attribute
));
6112 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6114 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6115 abfd
, info_ptr
, cu
);
6117 /* If this attribute is an absolute reference to a different
6118 compilation unit, make sure that compilation unit is loaded
6120 if (die
->attrs
[i
].form
== DW_FORM_ref_addr
6121 && (DW_ADDR (&die
->attrs
[i
]) < cu
->header
.offset
6122 || (DW_ADDR (&die
->attrs
[i
])
6123 >= cu
->header
.offset
+ cu
->header
.length
)))
6125 struct dwarf2_per_cu_data
*per_cu
;
6126 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (&die
->attrs
[i
]),
6129 /* Mark the dependence relation so that we don't flush PER_CU
6131 dwarf2_add_dependence (cu
, per_cu
);
6133 /* If it's already on the queue, we have nothing to do. */
6137 /* If the compilation unit is already loaded, just mark it as
6139 if (per_cu
->cu
!= NULL
)
6141 per_cu
->cu
->last_used
= 0;
6145 /* Add it to the queue. */
6146 queue_comp_unit (per_cu
);
6151 *has_children
= abbrev
->has_children
;
6155 /* Read an attribute value described by an attribute form. */
6158 read_attribute_value (struct attribute
*attr
, unsigned form
,
6159 bfd
*abfd
, gdb_byte
*info_ptr
,
6160 struct dwarf2_cu
*cu
)
6162 struct comp_unit_head
*cu_header
= &cu
->header
;
6163 unsigned int bytes_read
;
6164 struct dwarf_block
*blk
;
6170 case DW_FORM_ref_addr
:
6171 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
6172 info_ptr
+= bytes_read
;
6174 case DW_FORM_block2
:
6175 blk
= dwarf_alloc_block (cu
);
6176 blk
->size
= read_2_bytes (abfd
, info_ptr
);
6178 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6179 info_ptr
+= blk
->size
;
6180 DW_BLOCK (attr
) = blk
;
6182 case DW_FORM_block4
:
6183 blk
= dwarf_alloc_block (cu
);
6184 blk
->size
= read_4_bytes (abfd
, info_ptr
);
6186 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6187 info_ptr
+= blk
->size
;
6188 DW_BLOCK (attr
) = blk
;
6191 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
6195 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
6199 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
6202 case DW_FORM_string
:
6203 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
6204 info_ptr
+= bytes_read
;
6207 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
6209 info_ptr
+= bytes_read
;
6212 blk
= dwarf_alloc_block (cu
);
6213 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6214 info_ptr
+= bytes_read
;
6215 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6216 info_ptr
+= blk
->size
;
6217 DW_BLOCK (attr
) = blk
;
6219 case DW_FORM_block1
:
6220 blk
= dwarf_alloc_block (cu
);
6221 blk
->size
= read_1_byte (abfd
, info_ptr
);
6223 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6224 info_ptr
+= blk
->size
;
6225 DW_BLOCK (attr
) = blk
;
6228 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
6232 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
6236 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
6237 info_ptr
+= bytes_read
;
6240 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6241 info_ptr
+= bytes_read
;
6244 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
6248 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
6252 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
6256 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
6259 case DW_FORM_ref_udata
:
6260 DW_ADDR (attr
) = (cu
->header
.offset
6261 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
6262 info_ptr
+= bytes_read
;
6264 case DW_FORM_indirect
:
6265 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6266 info_ptr
+= bytes_read
;
6267 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
6270 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
6271 dwarf_form_name (form
),
6272 bfd_get_filename (abfd
));
6277 /* Read an attribute described by an abbreviated attribute. */
6280 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
6281 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6283 attr
->name
= abbrev
->name
;
6284 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
6287 /* read dwarf information from a buffer */
6290 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
6292 return bfd_get_8 (abfd
, buf
);
6296 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
6298 return bfd_get_signed_8 (abfd
, buf
);
6302 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
6304 return bfd_get_16 (abfd
, buf
);
6308 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6310 return bfd_get_signed_16 (abfd
, buf
);
6314 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
6316 return bfd_get_32 (abfd
, buf
);
6320 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6322 return bfd_get_signed_32 (abfd
, buf
);
6325 static unsigned long
6326 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
6328 return bfd_get_64 (abfd
, buf
);
6332 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
6333 unsigned int *bytes_read
)
6335 struct comp_unit_head
*cu_header
= &cu
->header
;
6336 CORE_ADDR retval
= 0;
6338 if (cu_header
->signed_addr_p
)
6340 switch (cu_header
->addr_size
)
6343 retval
= bfd_get_signed_16 (abfd
, buf
);
6346 retval
= bfd_get_signed_32 (abfd
, buf
);
6349 retval
= bfd_get_signed_64 (abfd
, buf
);
6352 internal_error (__FILE__
, __LINE__
,
6353 _("read_address: bad switch, signed [in module %s]"),
6354 bfd_get_filename (abfd
));
6359 switch (cu_header
->addr_size
)
6362 retval
= bfd_get_16 (abfd
, buf
);
6365 retval
= bfd_get_32 (abfd
, buf
);
6368 retval
= bfd_get_64 (abfd
, buf
);
6371 internal_error (__FILE__
, __LINE__
,
6372 _("read_address: bad switch, unsigned [in module %s]"),
6373 bfd_get_filename (abfd
));
6377 *bytes_read
= cu_header
->addr_size
;
6381 /* Read the initial length from a section. The (draft) DWARF 3
6382 specification allows the initial length to take up either 4 bytes
6383 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
6384 bytes describe the length and all offsets will be 8 bytes in length
6387 An older, non-standard 64-bit format is also handled by this
6388 function. The older format in question stores the initial length
6389 as an 8-byte quantity without an escape value. Lengths greater
6390 than 2^32 aren't very common which means that the initial 4 bytes
6391 is almost always zero. Since a length value of zero doesn't make
6392 sense for the 32-bit format, this initial zero can be considered to
6393 be an escape value which indicates the presence of the older 64-bit
6394 format. As written, the code can't detect (old format) lengths
6395 greater than 4GB. If it becomes necessary to handle lengths
6396 somewhat larger than 4GB, we could allow other small values (such
6397 as the non-sensical values of 1, 2, and 3) to also be used as
6398 escape values indicating the presence of the old format.
6400 The value returned via bytes_read should be used to increment the
6401 relevant pointer after calling read_initial_length().
6403 As a side effect, this function sets the fields initial_length_size
6404 and offset_size in cu_header to the values appropriate for the
6405 length field. (The format of the initial length field determines
6406 the width of file offsets to be fetched later with read_offset().)
6408 [ Note: read_initial_length() and read_offset() are based on the
6409 document entitled "DWARF Debugging Information Format", revision
6410 3, draft 8, dated November 19, 2001. This document was obtained
6413 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
6415 This document is only a draft and is subject to change. (So beware.)
6417 Details regarding the older, non-standard 64-bit format were
6418 determined empirically by examining 64-bit ELF files produced by
6419 the SGI toolchain on an IRIX 6.5 machine.
6421 - Kevin, July 16, 2002
6425 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, struct comp_unit_head
*cu_header
,
6426 unsigned int *bytes_read
)
6428 LONGEST length
= bfd_get_32 (abfd
, buf
);
6430 if (length
== 0xffffffff)
6432 length
= bfd_get_64 (abfd
, buf
+ 4);
6435 else if (length
== 0)
6437 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
6438 length
= bfd_get_64 (abfd
, buf
);
6448 gdb_assert (cu_header
->initial_length_size
== 0
6449 || cu_header
->initial_length_size
== 4
6450 || cu_header
->initial_length_size
== 8
6451 || cu_header
->initial_length_size
== 12);
6453 if (cu_header
->initial_length_size
!= 0
6454 && cu_header
->initial_length_size
!= *bytes_read
)
6455 complaint (&symfile_complaints
,
6456 _("intermixed 32-bit and 64-bit DWARF sections"));
6458 cu_header
->initial_length_size
= *bytes_read
;
6459 cu_header
->offset_size
= (*bytes_read
== 4) ? 4 : 8;
6465 /* Read an offset from the data stream. The size of the offset is
6466 given by cu_header->offset_size. */
6469 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
6470 unsigned int *bytes_read
)
6474 switch (cu_header
->offset_size
)
6477 retval
= bfd_get_32 (abfd
, buf
);
6481 retval
= bfd_get_64 (abfd
, buf
);
6485 internal_error (__FILE__
, __LINE__
,
6486 _("read_offset: bad switch [in module %s]"),
6487 bfd_get_filename (abfd
));
6494 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
6496 /* If the size of a host char is 8 bits, we can return a pointer
6497 to the buffer, otherwise we have to copy the data to a buffer
6498 allocated on the temporary obstack. */
6499 gdb_assert (HOST_CHAR_BIT
== 8);
6504 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6506 /* If the size of a host char is 8 bits, we can return a pointer
6507 to the string, otherwise we have to copy the string to a buffer
6508 allocated on the temporary obstack. */
6509 gdb_assert (HOST_CHAR_BIT
== 8);
6512 *bytes_read_ptr
= 1;
6515 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
6516 return (char *) buf
;
6520 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
6521 const struct comp_unit_head
*cu_header
,
6522 unsigned int *bytes_read_ptr
)
6524 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
,
6527 if (dwarf2_per_objfile
->str_buffer
== NULL
)
6529 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
6530 bfd_get_filename (abfd
));
6533 if (str_offset
>= dwarf2_per_objfile
->str_size
)
6535 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
6536 bfd_get_filename (abfd
));
6539 gdb_assert (HOST_CHAR_BIT
== 8);
6540 if (dwarf2_per_objfile
->str_buffer
[str_offset
] == '\0')
6542 return (char *) (dwarf2_per_objfile
->str_buffer
+ str_offset
);
6545 static unsigned long
6546 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6548 unsigned long result
;
6549 unsigned int num_read
;
6559 byte
= bfd_get_8 (abfd
, buf
);
6562 result
|= ((unsigned long)(byte
& 127) << shift
);
6563 if ((byte
& 128) == 0)
6569 *bytes_read_ptr
= num_read
;
6574 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6577 int i
, shift
, num_read
;
6586 byte
= bfd_get_8 (abfd
, buf
);
6589 result
|= ((long)(byte
& 127) << shift
);
6591 if ((byte
& 128) == 0)
6596 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
6597 result
|= -(((long)1) << shift
);
6598 *bytes_read_ptr
= num_read
;
6602 /* Return a pointer to just past the end of an LEB128 number in BUF. */
6605 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
6611 byte
= bfd_get_8 (abfd
, buf
);
6613 if ((byte
& 128) == 0)
6619 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
6625 cu
->language
= language_c
;
6627 case DW_LANG_C_plus_plus
:
6628 cu
->language
= language_cplus
;
6630 case DW_LANG_Fortran77
:
6631 case DW_LANG_Fortran90
:
6632 case DW_LANG_Fortran95
:
6633 cu
->language
= language_fortran
;
6635 case DW_LANG_Mips_Assembler
:
6636 cu
->language
= language_asm
;
6639 cu
->language
= language_java
;
6643 cu
->language
= language_ada
;
6645 case DW_LANG_Modula2
:
6646 cu
->language
= language_m2
;
6648 case DW_LANG_Pascal83
:
6649 cu
->language
= language_pascal
;
6652 cu
->language
= language_objc
;
6654 case DW_LANG_Cobol74
:
6655 case DW_LANG_Cobol85
:
6657 cu
->language
= language_minimal
;
6660 cu
->language_defn
= language_def (cu
->language
);
6663 /* Return the named attribute or NULL if not there. */
6665 static struct attribute
*
6666 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
6669 struct attribute
*spec
= NULL
;
6671 for (i
= 0; i
< die
->num_attrs
; ++i
)
6673 if (die
->attrs
[i
].name
== name
)
6674 return &die
->attrs
[i
];
6675 if (die
->attrs
[i
].name
== DW_AT_specification
6676 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
6677 spec
= &die
->attrs
[i
];
6681 return dwarf2_attr (follow_die_ref (die
, spec
, cu
), name
, cu
);
6686 /* Return non-zero iff the attribute NAME is defined for the given DIE,
6687 and holds a non-zero value. This function should only be used for
6688 DW_FORM_flag attributes. */
6691 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
6693 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
6695 return (attr
&& DW_UNSND (attr
));
6699 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
6701 /* A DIE is a declaration if it has a DW_AT_declaration attribute
6702 which value is non-zero. However, we have to be careful with
6703 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
6704 (via dwarf2_flag_true_p) follows this attribute. So we may
6705 end up accidently finding a declaration attribute that belongs
6706 to a different DIE referenced by the specification attribute,
6707 even though the given DIE does not have a declaration attribute. */
6708 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
6709 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
6712 /* Return the die giving the specification for DIE, if there is
6715 static struct die_info
*
6716 die_specification (struct die_info
*die
, struct dwarf2_cu
*cu
)
6718 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
, cu
);
6720 if (spec_attr
== NULL
)
6723 return follow_die_ref (die
, spec_attr
, cu
);
6726 /* Free the line_header structure *LH, and any arrays and strings it
6729 free_line_header (struct line_header
*lh
)
6731 if (lh
->standard_opcode_lengths
)
6732 xfree (lh
->standard_opcode_lengths
);
6734 /* Remember that all the lh->file_names[i].name pointers are
6735 pointers into debug_line_buffer, and don't need to be freed. */
6737 xfree (lh
->file_names
);
6739 /* Similarly for the include directory names. */
6740 if (lh
->include_dirs
)
6741 xfree (lh
->include_dirs
);
6747 /* Add an entry to LH's include directory table. */
6749 add_include_dir (struct line_header
*lh
, char *include_dir
)
6751 /* Grow the array if necessary. */
6752 if (lh
->include_dirs_size
== 0)
6754 lh
->include_dirs_size
= 1; /* for testing */
6755 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
6756 * sizeof (*lh
->include_dirs
));
6758 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
6760 lh
->include_dirs_size
*= 2;
6761 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
6762 (lh
->include_dirs_size
6763 * sizeof (*lh
->include_dirs
)));
6766 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
6770 /* Add an entry to LH's file name table. */
6772 add_file_name (struct line_header
*lh
,
6774 unsigned int dir_index
,
6775 unsigned int mod_time
,
6776 unsigned int length
)
6778 struct file_entry
*fe
;
6780 /* Grow the array if necessary. */
6781 if (lh
->file_names_size
== 0)
6783 lh
->file_names_size
= 1; /* for testing */
6784 lh
->file_names
= xmalloc (lh
->file_names_size
6785 * sizeof (*lh
->file_names
));
6787 else if (lh
->num_file_names
>= lh
->file_names_size
)
6789 lh
->file_names_size
*= 2;
6790 lh
->file_names
= xrealloc (lh
->file_names
,
6791 (lh
->file_names_size
6792 * sizeof (*lh
->file_names
)));
6795 fe
= &lh
->file_names
[lh
->num_file_names
++];
6797 fe
->dir_index
= dir_index
;
6798 fe
->mod_time
= mod_time
;
6799 fe
->length
= length
;
6805 /* Read the statement program header starting at OFFSET in
6806 .debug_line, according to the endianness of ABFD. Return a pointer
6807 to a struct line_header, allocated using xmalloc.
6809 NOTE: the strings in the include directory and file name tables of
6810 the returned object point into debug_line_buffer, and must not be
6812 static struct line_header
*
6813 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
6814 struct dwarf2_cu
*cu
)
6816 struct cleanup
*back_to
;
6817 struct line_header
*lh
;
6819 unsigned int bytes_read
;
6821 char *cur_dir
, *cur_file
;
6823 if (dwarf2_per_objfile
->line_buffer
== NULL
)
6825 complaint (&symfile_complaints
, _("missing .debug_line section"));
6829 /* Make sure that at least there's room for the total_length field.
6830 That could be 12 bytes long, but we're just going to fudge that. */
6831 if (offset
+ 4 >= dwarf2_per_objfile
->line_size
)
6833 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6837 lh
= xmalloc (sizeof (*lh
));
6838 memset (lh
, 0, sizeof (*lh
));
6839 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
6842 line_ptr
= dwarf2_per_objfile
->line_buffer
+ offset
;
6844 /* Read in the header. */
6846 read_initial_length (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6847 line_ptr
+= bytes_read
;
6848 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line_buffer
6849 + dwarf2_per_objfile
->line_size
))
6851 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6854 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
6855 lh
->version
= read_2_bytes (abfd
, line_ptr
);
6857 lh
->header_length
= read_offset (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6858 line_ptr
+= bytes_read
;
6859 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
6861 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
6863 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
6865 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
6867 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
6869 lh
->standard_opcode_lengths
6870 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
6872 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
6873 for (i
= 1; i
< lh
->opcode_base
; ++i
)
6875 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
6879 /* Read directory table. */
6880 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6882 line_ptr
+= bytes_read
;
6883 add_include_dir (lh
, cur_dir
);
6885 line_ptr
+= bytes_read
;
6887 /* Read file name table. */
6888 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6890 unsigned int dir_index
, mod_time
, length
;
6892 line_ptr
+= bytes_read
;
6893 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6894 line_ptr
+= bytes_read
;
6895 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6896 line_ptr
+= bytes_read
;
6897 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6898 line_ptr
+= bytes_read
;
6900 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6902 line_ptr
+= bytes_read
;
6903 lh
->statement_program_start
= line_ptr
;
6905 if (line_ptr
> (dwarf2_per_objfile
->line_buffer
6906 + dwarf2_per_objfile
->line_size
))
6907 complaint (&symfile_complaints
,
6908 _("line number info header doesn't fit in `.debug_line' section"));
6910 discard_cleanups (back_to
);
6914 /* This function exists to work around a bug in certain compilers
6915 (particularly GCC 2.95), in which the first line number marker of a
6916 function does not show up until after the prologue, right before
6917 the second line number marker. This function shifts ADDRESS down
6918 to the beginning of the function if necessary, and is called on
6919 addresses passed to record_line. */
6922 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
6924 struct function_range
*fn
;
6926 /* Find the function_range containing address. */
6931 cu
->cached_fn
= cu
->first_fn
;
6935 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6941 while (fn
&& fn
!= cu
->cached_fn
)
6942 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6952 if (address
!= fn
->lowpc
)
6953 complaint (&symfile_complaints
,
6954 _("misplaced first line number at 0x%lx for '%s'"),
6955 (unsigned long) address
, fn
->name
);
6960 /* Decode the Line Number Program (LNP) for the given line_header
6961 structure and CU. The actual information extracted and the type
6962 of structures created from the LNP depends on the value of PST.
6964 1. If PST is NULL, then this procedure uses the data from the program
6965 to create all necessary symbol tables, and their linetables.
6966 The compilation directory of the file is passed in COMP_DIR,
6967 and must not be NULL.
6969 2. If PST is not NULL, this procedure reads the program to determine
6970 the list of files included by the unit represented by PST, and
6971 builds all the associated partial symbol tables. In this case,
6972 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
6973 is not used to compute the full name of the symtab, and therefore
6974 omitting it when building the partial symtab does not introduce
6975 the potential for inconsistency - a partial symtab and its associated
6976 symbtab having a different fullname -). */
6979 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
6980 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
6982 gdb_byte
*line_ptr
, *extended_end
;
6984 unsigned int bytes_read
, extended_len
;
6985 unsigned char op_code
, extended_op
, adj_opcode
;
6987 struct objfile
*objfile
= cu
->objfile
;
6988 const int decode_for_pst_p
= (pst
!= NULL
);
6989 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
6991 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6993 line_ptr
= lh
->statement_program_start
;
6994 line_end
= lh
->statement_program_end
;
6996 /* Read the statement sequences until there's nothing left. */
6997 while (line_ptr
< line_end
)
6999 /* state machine registers */
7000 CORE_ADDR address
= 0;
7001 unsigned int file
= 1;
7002 unsigned int line
= 1;
7003 unsigned int column
= 0;
7004 int is_stmt
= lh
->default_is_stmt
;
7005 int basic_block
= 0;
7006 int end_sequence
= 0;
7008 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
7010 /* Start a subfile for the current file of the state machine. */
7011 /* lh->include_dirs and lh->file_names are 0-based, but the
7012 directory and file name numbers in the statement program
7014 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
7018 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7020 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7023 /* Decode the table. */
7024 while (!end_sequence
)
7026 op_code
= read_1_byte (abfd
, line_ptr
);
7029 if (op_code
>= lh
->opcode_base
)
7031 /* Special operand. */
7032 adj_opcode
= op_code
- lh
->opcode_base
;
7033 address
+= (adj_opcode
/ lh
->line_range
)
7034 * lh
->minimum_instruction_length
;
7035 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
7036 if (lh
->num_file_names
< file
)
7037 dwarf2_debug_line_missing_file_complaint ();
7040 lh
->file_names
[file
- 1].included_p
= 1;
7041 if (!decode_for_pst_p
)
7043 if (last_subfile
!= current_subfile
)
7046 record_line (last_subfile
, 0, address
);
7047 last_subfile
= current_subfile
;
7049 /* Append row to matrix using current values. */
7050 record_line (current_subfile
, line
,
7051 check_cu_functions (address
, cu
));
7056 else switch (op_code
)
7058 case DW_LNS_extended_op
:
7059 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7060 line_ptr
+= bytes_read
;
7061 extended_end
= line_ptr
+ extended_len
;
7062 extended_op
= read_1_byte (abfd
, line_ptr
);
7064 switch (extended_op
)
7066 case DW_LNE_end_sequence
:
7069 if (lh
->num_file_names
< file
)
7070 dwarf2_debug_line_missing_file_complaint ();
7073 lh
->file_names
[file
- 1].included_p
= 1;
7074 if (!decode_for_pst_p
)
7075 record_line (current_subfile
, 0, address
);
7078 case DW_LNE_set_address
:
7079 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
7080 line_ptr
+= bytes_read
;
7081 address
+= baseaddr
;
7083 case DW_LNE_define_file
:
7086 unsigned int dir_index
, mod_time
, length
;
7088 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
7089 line_ptr
+= bytes_read
;
7091 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7092 line_ptr
+= bytes_read
;
7094 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7095 line_ptr
+= bytes_read
;
7097 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7098 line_ptr
+= bytes_read
;
7099 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7103 complaint (&symfile_complaints
,
7104 _("mangled .debug_line section"));
7107 /* Make sure that we parsed the extended op correctly. If e.g.
7108 we expected a different address size than the producer used,
7109 we may have read the wrong number of bytes. */
7110 if (line_ptr
!= extended_end
)
7112 complaint (&symfile_complaints
,
7113 _("mangled .debug_line section"));
7118 if (lh
->num_file_names
< file
)
7119 dwarf2_debug_line_missing_file_complaint ();
7122 lh
->file_names
[file
- 1].included_p
= 1;
7123 if (!decode_for_pst_p
)
7125 if (last_subfile
!= current_subfile
)
7128 record_line (last_subfile
, 0, address
);
7129 last_subfile
= current_subfile
;
7131 record_line (current_subfile
, line
,
7132 check_cu_functions (address
, cu
));
7137 case DW_LNS_advance_pc
:
7138 address
+= lh
->minimum_instruction_length
7139 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7140 line_ptr
+= bytes_read
;
7142 case DW_LNS_advance_line
:
7143 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
7144 line_ptr
+= bytes_read
;
7146 case DW_LNS_set_file
:
7148 /* The arrays lh->include_dirs and lh->file_names are
7149 0-based, but the directory and file name numbers in
7150 the statement program are 1-based. */
7151 struct file_entry
*fe
;
7154 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7155 line_ptr
+= bytes_read
;
7156 if (lh
->num_file_names
< file
)
7157 dwarf2_debug_line_missing_file_complaint ();
7160 fe
= &lh
->file_names
[file
- 1];
7162 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7163 if (!decode_for_pst_p
)
7165 last_subfile
= current_subfile
;
7166 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7171 case DW_LNS_set_column
:
7172 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7173 line_ptr
+= bytes_read
;
7175 case DW_LNS_negate_stmt
:
7176 is_stmt
= (!is_stmt
);
7178 case DW_LNS_set_basic_block
:
7181 /* Add to the address register of the state machine the
7182 address increment value corresponding to special opcode
7183 255. I.e., this value is scaled by the minimum
7184 instruction length since special opcode 255 would have
7185 scaled the the increment. */
7186 case DW_LNS_const_add_pc
:
7187 address
+= (lh
->minimum_instruction_length
7188 * ((255 - lh
->opcode_base
) / lh
->line_range
));
7190 case DW_LNS_fixed_advance_pc
:
7191 address
+= read_2_bytes (abfd
, line_ptr
);
7196 /* Unknown standard opcode, ignore it. */
7199 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
7201 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7202 line_ptr
+= bytes_read
;
7209 if (decode_for_pst_p
)
7213 /* Now that we're done scanning the Line Header Program, we can
7214 create the psymtab of each included file. */
7215 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
7216 if (lh
->file_names
[file_index
].included_p
== 1)
7218 const struct file_entry fe
= lh
->file_names
[file_index
];
7219 char *include_name
= fe
.name
;
7220 char *dir_name
= NULL
;
7221 char *pst_filename
= pst
->filename
;
7224 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
7226 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
7228 include_name
= concat (dir_name
, SLASH_STRING
,
7229 include_name
, (char *)NULL
);
7230 make_cleanup (xfree
, include_name
);
7233 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
7235 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
7236 pst_filename
, (char *)NULL
);
7237 make_cleanup (xfree
, pst_filename
);
7240 if (strcmp (include_name
, pst_filename
) != 0)
7241 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
7246 /* Make sure a symtab is created for every file, even files
7247 which contain only variables (i.e. no code with associated
7251 struct file_entry
*fe
;
7253 for (i
= 0; i
< lh
->num_file_names
; i
++)
7256 fe
= &lh
->file_names
[i
];
7258 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7259 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7261 /* Skip the main file; we don't need it, and it must be
7262 allocated last, so that it will show up before the
7263 non-primary symtabs in the objfile's symtab list. */
7264 if (current_subfile
== first_subfile
)
7267 if (current_subfile
->symtab
== NULL
)
7268 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
7270 fe
->symtab
= current_subfile
->symtab
;
7275 /* Start a subfile for DWARF. FILENAME is the name of the file and
7276 DIRNAME the name of the source directory which contains FILENAME
7277 or NULL if not known. COMP_DIR is the compilation directory for the
7278 linetable's compilation unit or NULL if not known.
7279 This routine tries to keep line numbers from identical absolute and
7280 relative file names in a common subfile.
7282 Using the `list' example from the GDB testsuite, which resides in
7283 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
7284 of /srcdir/list0.c yields the following debugging information for list0.c:
7286 DW_AT_name: /srcdir/list0.c
7287 DW_AT_comp_dir: /compdir
7288 files.files[0].name: list0.h
7289 files.files[0].dir: /srcdir
7290 files.files[1].name: list0.c
7291 files.files[1].dir: /srcdir
7293 The line number information for list0.c has to end up in a single
7294 subfile, so that `break /srcdir/list0.c:1' works as expected.
7295 start_subfile will ensure that this happens provided that we pass the
7296 concatenation of files.files[1].dir and files.files[1].name as the
7300 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
7304 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
7305 `start_symtab' will always pass the contents of DW_AT_comp_dir as
7306 second argument to start_subfile. To be consistent, we do the
7307 same here. In order not to lose the line information directory,
7308 we concatenate it to the filename when it makes sense.
7309 Note that the Dwarf3 standard says (speaking of filenames in line
7310 information): ``The directory index is ignored for file names
7311 that represent full path names''. Thus ignoring dirname in the
7312 `else' branch below isn't an issue. */
7314 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
7315 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
7317 fullname
= filename
;
7319 start_subfile (fullname
, comp_dir
);
7321 if (fullname
!= filename
)
7326 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
7327 struct dwarf2_cu
*cu
)
7329 struct objfile
*objfile
= cu
->objfile
;
7330 struct comp_unit_head
*cu_header
= &cu
->header
;
7332 /* NOTE drow/2003-01-30: There used to be a comment and some special
7333 code here to turn a symbol with DW_AT_external and a
7334 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
7335 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
7336 with some versions of binutils) where shared libraries could have
7337 relocations against symbols in their debug information - the
7338 minimal symbol would have the right address, but the debug info
7339 would not. It's no longer necessary, because we will explicitly
7340 apply relocations when we read in the debug information now. */
7342 /* A DW_AT_location attribute with no contents indicates that a
7343 variable has been optimized away. */
7344 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
7346 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7350 /* Handle one degenerate form of location expression specially, to
7351 preserve GDB's previous behavior when section offsets are
7352 specified. If this is just a DW_OP_addr then mark this symbol
7355 if (attr_form_is_block (attr
)
7356 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
7357 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
7361 SYMBOL_VALUE_ADDRESS (sym
) =
7362 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
7363 fixup_symbol_section (sym
, objfile
);
7364 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
7365 SYMBOL_SECTION (sym
));
7366 SYMBOL_CLASS (sym
) = LOC_STATIC
;
7370 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
7371 expression evaluator, and use LOC_COMPUTED only when necessary
7372 (i.e. when the value of a register or memory location is
7373 referenced, or a thread-local block, etc.). Then again, it might
7374 not be worthwhile. I'm assuming that it isn't unless performance
7375 or memory numbers show me otherwise. */
7377 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
7378 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
7381 /* Given a pointer to a DWARF information entry, figure out if we need
7382 to make a symbol table entry for it, and if so, create a new entry
7383 and return a pointer to it.
7384 If TYPE is NULL, determine symbol type from the die, otherwise
7385 used the passed type. */
7387 static struct symbol
*
7388 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
7390 struct objfile
*objfile
= cu
->objfile
;
7391 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7392 struct symbol
*sym
= NULL
;
7394 struct attribute
*attr
= NULL
;
7395 struct attribute
*attr2
= NULL
;
7398 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7400 if (die
->tag
!= DW_TAG_namespace
)
7401 name
= dwarf2_linkage_name (die
, cu
);
7403 name
= TYPE_NAME (type
);
7407 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
7408 sizeof (struct symbol
));
7409 OBJSTAT (objfile
, n_syms
++);
7410 memset (sym
, 0, sizeof (struct symbol
));
7412 /* Cache this symbol's name and the name's demangled form (if any). */
7413 SYMBOL_LANGUAGE (sym
) = cu
->language
;
7414 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
7416 /* Default assumptions.
7417 Use the passed type or decode it from the die. */
7418 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7419 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7421 SYMBOL_TYPE (sym
) = type
;
7423 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
7424 attr
= dwarf2_attr (die
, DW_AT_decl_line
, cu
);
7427 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
7430 attr
= dwarf2_attr (die
, DW_AT_decl_file
, cu
);
7433 int file_index
= DW_UNSND (attr
);
7434 if (cu
->line_header
== NULL
7435 || file_index
> cu
->line_header
->num_file_names
)
7436 complaint (&symfile_complaints
,
7437 _("file index out of range"));
7438 else if (file_index
> 0)
7440 struct file_entry
*fe
;
7441 fe
= &cu
->line_header
->file_names
[file_index
- 1];
7442 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
7449 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
7452 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
7454 SYMBOL_CLASS (sym
) = LOC_LABEL
;
7456 case DW_TAG_subprogram
:
7457 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
7459 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
7460 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7461 if ((attr2
&& (DW_UNSND (attr2
) != 0))
7462 || cu
->language
== language_ada
)
7464 /* Subprograms marked external are stored as a global symbol.
7465 Ada subprograms, whether marked external or not, are always
7466 stored as a global symbol, because we want to be able to
7467 access them globally. For instance, we want to be able
7468 to break on a nested subprogram without having to
7469 specify the context. */
7470 add_symbol_to_list (sym
, &global_symbols
);
7474 add_symbol_to_list (sym
, cu
->list_in_scope
);
7477 case DW_TAG_variable
:
7478 /* Compilation with minimal debug info may result in variables
7479 with missing type entries. Change the misleading `void' type
7480 to something sensible. */
7481 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
7483 = builtin_type (gdbarch
)->nodebug_data_symbol
;
7485 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7488 dwarf2_const_value (attr
, sym
, cu
);
7489 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7490 if (attr2
&& (DW_UNSND (attr2
) != 0))
7491 add_symbol_to_list (sym
, &global_symbols
);
7493 add_symbol_to_list (sym
, cu
->list_in_scope
);
7496 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7499 var_decode_location (attr
, sym
, cu
);
7500 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7501 if (attr2
&& (DW_UNSND (attr2
) != 0))
7502 add_symbol_to_list (sym
, &global_symbols
);
7504 add_symbol_to_list (sym
, cu
->list_in_scope
);
7508 /* We do not know the address of this symbol.
7509 If it is an external symbol and we have type information
7510 for it, enter the symbol as a LOC_UNRESOLVED symbol.
7511 The address of the variable will then be determined from
7512 the minimal symbol table whenever the variable is
7514 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7515 if (attr2
&& (DW_UNSND (attr2
) != 0)
7516 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
7518 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
7519 add_symbol_to_list (sym
, &global_symbols
);
7523 case DW_TAG_formal_parameter
:
7524 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7527 var_decode_location (attr
, sym
, cu
);
7528 /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
7529 if (SYMBOL_CLASS (sym
) == LOC_COMPUTED
)
7530 SYMBOL_CLASS (sym
) = LOC_COMPUTED_ARG
;
7532 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7535 dwarf2_const_value (attr
, sym
, cu
);
7537 add_symbol_to_list (sym
, cu
->list_in_scope
);
7539 case DW_TAG_unspecified_parameters
:
7540 /* From varargs functions; gdb doesn't seem to have any
7541 interest in this information, so just ignore it for now.
7544 case DW_TAG_class_type
:
7545 case DW_TAG_interface_type
:
7546 case DW_TAG_structure_type
:
7547 case DW_TAG_union_type
:
7548 case DW_TAG_set_type
:
7549 case DW_TAG_enumeration_type
:
7550 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7551 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7553 /* Make sure that the symbol includes appropriate enclosing
7554 classes/namespaces in its name. These are calculated in
7555 read_structure_type, and the correct name is saved in
7558 if (cu
->language
== language_cplus
7559 || cu
->language
== language_java
)
7561 struct type
*type
= SYMBOL_TYPE (sym
);
7563 if (TYPE_TAG_NAME (type
) != NULL
)
7565 /* FIXME: carlton/2003-11-10: Should this use
7566 SYMBOL_SET_NAMES instead? (The same problem also
7567 arises further down in this function.) */
7568 /* The type's name is already allocated along with
7569 this objfile, so we don't need to duplicate it
7571 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
7576 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
7577 really ever be static objects: otherwise, if you try
7578 to, say, break of a class's method and you're in a file
7579 which doesn't mention that class, it won't work unless
7580 the check for all static symbols in lookup_symbol_aux
7581 saves you. See the OtherFileClass tests in
7582 gdb.c++/namespace.exp. */
7584 struct pending
**list_to_add
;
7586 list_to_add
= (cu
->list_in_scope
== &file_symbols
7587 && (cu
->language
== language_cplus
7588 || cu
->language
== language_java
)
7589 ? &global_symbols
: cu
->list_in_scope
);
7591 add_symbol_to_list (sym
, list_to_add
);
7593 /* The semantics of C++ state that "struct foo { ... }" also
7594 defines a typedef for "foo". A Java class declaration also
7595 defines a typedef for the class. Synthesize a typedef symbol
7596 so that "ptype foo" works as expected. */
7597 if (cu
->language
== language_cplus
7598 || cu
->language
== language_java
7599 || cu
->language
== language_ada
)
7601 struct symbol
*typedef_sym
= (struct symbol
*)
7602 obstack_alloc (&objfile
->objfile_obstack
,
7603 sizeof (struct symbol
));
7604 *typedef_sym
= *sym
;
7605 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
7606 /* The symbol's name is already allocated along with
7607 this objfile, so we don't need to duplicate it for
7609 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
7610 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
7611 add_symbol_to_list (typedef_sym
, list_to_add
);
7615 case DW_TAG_typedef
:
7616 if (processing_has_namespace_info
7617 && processing_current_prefix
[0] != '\0')
7619 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7620 processing_current_prefix
,
7623 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7624 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7625 add_symbol_to_list (sym
, cu
->list_in_scope
);
7627 case DW_TAG_base_type
:
7628 case DW_TAG_subrange_type
:
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_enumerator
:
7634 if (processing_has_namespace_info
7635 && processing_current_prefix
[0] != '\0')
7637 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7638 processing_current_prefix
,
7641 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7644 dwarf2_const_value (attr
, sym
, cu
);
7647 /* NOTE: carlton/2003-11-10: See comment above in the
7648 DW_TAG_class_type, etc. block. */
7650 struct pending
**list_to_add
;
7652 list_to_add
= (cu
->list_in_scope
== &file_symbols
7653 && (cu
->language
== language_cplus
7654 || cu
->language
== language_java
)
7655 ? &global_symbols
: cu
->list_in_scope
);
7657 add_symbol_to_list (sym
, list_to_add
);
7660 case DW_TAG_namespace
:
7661 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7662 add_symbol_to_list (sym
, &global_symbols
);
7665 /* Not a tag we recognize. Hopefully we aren't processing
7666 trash data, but since we must specifically ignore things
7667 we don't recognize, there is nothing else we should do at
7669 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
7670 dwarf_tag_name (die
->tag
));
7677 /* Copy constant value from an attribute to a symbol. */
7680 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
7681 struct dwarf2_cu
*cu
)
7683 struct objfile
*objfile
= cu
->objfile
;
7684 struct comp_unit_head
*cu_header
= &cu
->header
;
7685 struct dwarf_block
*blk
;
7690 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
7691 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7692 cu_header
->addr_size
,
7693 TYPE_LENGTH (SYMBOL_TYPE
7695 SYMBOL_VALUE_BYTES (sym
) =
7696 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
7697 /* NOTE: cagney/2003-05-09: In-lined store_address call with
7698 it's body - store_unsigned_integer. */
7699 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
7701 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7703 case DW_FORM_block1
:
7704 case DW_FORM_block2
:
7705 case DW_FORM_block4
:
7707 blk
= DW_BLOCK (attr
);
7708 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
7709 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7711 TYPE_LENGTH (SYMBOL_TYPE
7713 SYMBOL_VALUE_BYTES (sym
) =
7714 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
7715 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
7716 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7719 /* The DW_AT_const_value attributes are supposed to carry the
7720 symbol's value "represented as it would be on the target
7721 architecture." By the time we get here, it's already been
7722 converted to host endianness, so we just need to sign- or
7723 zero-extend it as appropriate. */
7725 dwarf2_const_value_data (attr
, sym
, 8);
7728 dwarf2_const_value_data (attr
, sym
, 16);
7731 dwarf2_const_value_data (attr
, sym
, 32);
7734 dwarf2_const_value_data (attr
, sym
, 64);
7738 SYMBOL_VALUE (sym
) = DW_SND (attr
);
7739 SYMBOL_CLASS (sym
) = LOC_CONST
;
7743 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
7744 SYMBOL_CLASS (sym
) = LOC_CONST
;
7748 complaint (&symfile_complaints
,
7749 _("unsupported const value attribute form: '%s'"),
7750 dwarf_form_name (attr
->form
));
7751 SYMBOL_VALUE (sym
) = 0;
7752 SYMBOL_CLASS (sym
) = LOC_CONST
;
7758 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
7759 or zero-extend it as appropriate for the symbol's type. */
7761 dwarf2_const_value_data (struct attribute
*attr
,
7765 LONGEST l
= DW_UNSND (attr
);
7767 if (bits
< sizeof (l
) * 8)
7769 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
7770 l
&= ((LONGEST
) 1 << bits
) - 1;
7772 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
7775 SYMBOL_VALUE (sym
) = l
;
7776 SYMBOL_CLASS (sym
) = LOC_CONST
;
7780 /* Return the type of the die in question using its DW_AT_type attribute. */
7782 static struct type
*
7783 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7785 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7787 struct attribute
*type_attr
;
7788 struct die_info
*type_die
;
7790 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
7793 /* A missing DW_AT_type represents a void type. */
7794 return builtin_type (gdbarch
)->builtin_void
;
7797 type_die
= follow_die_ref (die
, type_attr
, cu
);
7799 type
= tag_type_to_type (type_die
, cu
);
7802 dump_die (type_die
);
7803 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
7809 /* Return the containing type of the die in question using its
7810 DW_AT_containing_type attribute. */
7812 static struct type
*
7813 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7815 struct type
*type
= NULL
;
7816 struct attribute
*type_attr
;
7817 struct die_info
*type_die
= NULL
;
7819 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
7822 type_die
= follow_die_ref (die
, type_attr
, cu
);
7823 type
= tag_type_to_type (type_die
, cu
);
7828 dump_die (type_die
);
7829 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
7835 static struct type
*
7836 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7844 read_type_die (die
, cu
);
7848 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
7856 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7858 char *prefix
= determine_prefix (die
, cu
);
7859 const char *old_prefix
= processing_current_prefix
;
7860 struct cleanup
*back_to
= make_cleanup (xfree
, prefix
);
7861 processing_current_prefix
= prefix
;
7865 case DW_TAG_class_type
:
7866 case DW_TAG_interface_type
:
7867 case DW_TAG_structure_type
:
7868 case DW_TAG_union_type
:
7869 read_structure_type (die
, cu
);
7871 case DW_TAG_enumeration_type
:
7872 read_enumeration_type (die
, cu
);
7874 case DW_TAG_subprogram
:
7875 case DW_TAG_subroutine_type
:
7876 read_subroutine_type (die
, cu
);
7878 case DW_TAG_array_type
:
7879 read_array_type (die
, cu
);
7881 case DW_TAG_set_type
:
7882 read_set_type (die
, cu
);
7884 case DW_TAG_pointer_type
:
7885 read_tag_pointer_type (die
, cu
);
7887 case DW_TAG_ptr_to_member_type
:
7888 read_tag_ptr_to_member_type (die
, cu
);
7890 case DW_TAG_reference_type
:
7891 read_tag_reference_type (die
, cu
);
7893 case DW_TAG_const_type
:
7894 read_tag_const_type (die
, cu
);
7896 case DW_TAG_volatile_type
:
7897 read_tag_volatile_type (die
, cu
);
7899 case DW_TAG_string_type
:
7900 read_tag_string_type (die
, cu
);
7902 case DW_TAG_typedef
:
7903 read_typedef (die
, cu
);
7905 case DW_TAG_subrange_type
:
7906 read_subrange_type (die
, cu
);
7908 case DW_TAG_base_type
:
7909 read_base_type (die
, cu
);
7911 case DW_TAG_unspecified_type
:
7912 read_unspecified_type (die
, cu
);
7915 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
7916 dwarf_tag_name (die
->tag
));
7920 processing_current_prefix
= old_prefix
;
7921 do_cleanups (back_to
);
7924 /* Return the name of the namespace/class that DIE is defined within,
7925 or "" if we can't tell. The caller should xfree the result. */
7927 /* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
7928 therein) for an example of how to use this function to deal with
7929 DW_AT_specification. */
7932 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
7934 struct die_info
*parent
;
7936 if (cu
->language
!= language_cplus
7937 && cu
->language
!= language_java
)
7940 parent
= die
->parent
;
7944 return xstrdup ("");
7948 switch (parent
->tag
) {
7949 case DW_TAG_namespace
:
7951 /* FIXME: carlton/2004-03-05: Should I follow extension dies
7952 before doing this check? */
7953 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7955 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7960 char *parent_prefix
= determine_prefix (parent
, cu
);
7961 char *retval
= typename_concat (NULL
, parent_prefix
,
7962 namespace_name (parent
, &dummy
,
7965 xfree (parent_prefix
);
7970 case DW_TAG_class_type
:
7971 case DW_TAG_interface_type
:
7972 case DW_TAG_structure_type
:
7974 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7976 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7980 const char *old_prefix
= processing_current_prefix
;
7981 char *new_prefix
= determine_prefix (parent
, cu
);
7984 processing_current_prefix
= new_prefix
;
7985 retval
= determine_class_name (parent
, cu
);
7986 processing_current_prefix
= old_prefix
;
7993 return determine_prefix (parent
, cu
);
7998 /* Return a newly-allocated string formed by concatenating PREFIX and
7999 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
8000 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
8001 perform an obconcat, otherwise allocate storage for the result. The CU argument
8002 is used to determine the language and hence, the appropriate separator. */
8004 #define MAX_SEP_LEN 2 /* sizeof ("::") */
8007 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
8008 struct dwarf2_cu
*cu
)
8012 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
8014 else if (cu
->language
== language_java
)
8021 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
8026 strcpy (retval
, prefix
);
8027 strcat (retval
, sep
);
8030 strcat (retval
, suffix
);
8036 /* We have an obstack. */
8037 return obconcat (obs
, prefix
, sep
, suffix
);
8043 copy_die (struct die_info
*old_die
)
8045 struct die_info
*new_die
;
8048 new_die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
8049 memset (new_die
, 0, sizeof (struct die_info
));
8051 new_die
->tag
= old_die
->tag
;
8052 new_die
->has_children
= old_die
->has_children
;
8053 new_die
->abbrev
= old_die
->abbrev
;
8054 new_die
->offset
= old_die
->offset
;
8055 new_die
->type
= NULL
;
8057 num_attrs
= old_die
->num_attrs
;
8058 new_die
->num_attrs
= num_attrs
;
8059 new_die
->attrs
= (struct attribute
*)
8060 xmalloc (num_attrs
* sizeof (struct attribute
));
8062 for (i
= 0; i
< old_die
->num_attrs
; ++i
)
8064 new_die
->attrs
[i
].name
= old_die
->attrs
[i
].name
;
8065 new_die
->attrs
[i
].form
= old_die
->attrs
[i
].form
;
8066 new_die
->attrs
[i
].u
.addr
= old_die
->attrs
[i
].u
.addr
;
8069 new_die
->next
= NULL
;
8074 /* Return sibling of die, NULL if no sibling. */
8076 static struct die_info
*
8077 sibling_die (struct die_info
*die
)
8079 return die
->sibling
;
8082 /* Get linkage name of a die, return NULL if not found. */
8085 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8087 struct attribute
*attr
;
8089 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8090 if (attr
&& DW_STRING (attr
))
8091 return DW_STRING (attr
);
8092 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8093 if (attr
&& DW_STRING (attr
))
8094 return DW_STRING (attr
);
8098 /* Get name of a die, return NULL if not found. */
8101 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8103 struct attribute
*attr
;
8105 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8106 if (attr
&& DW_STRING (attr
))
8107 return DW_STRING (attr
);
8111 /* Return the die that this die in an extension of, or NULL if there
8114 static struct die_info
*
8115 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
*cu
)
8117 struct attribute
*attr
;
8119 attr
= dwarf2_attr (die
, DW_AT_extension
, cu
);
8123 return follow_die_ref (die
, attr
, cu
);
8126 /* Convert a DIE tag into its string name. */
8129 dwarf_tag_name (unsigned tag
)
8133 case DW_TAG_padding
:
8134 return "DW_TAG_padding";
8135 case DW_TAG_array_type
:
8136 return "DW_TAG_array_type";
8137 case DW_TAG_class_type
:
8138 return "DW_TAG_class_type";
8139 case DW_TAG_entry_point
:
8140 return "DW_TAG_entry_point";
8141 case DW_TAG_enumeration_type
:
8142 return "DW_TAG_enumeration_type";
8143 case DW_TAG_formal_parameter
:
8144 return "DW_TAG_formal_parameter";
8145 case DW_TAG_imported_declaration
:
8146 return "DW_TAG_imported_declaration";
8148 return "DW_TAG_label";
8149 case DW_TAG_lexical_block
:
8150 return "DW_TAG_lexical_block";
8152 return "DW_TAG_member";
8153 case DW_TAG_pointer_type
:
8154 return "DW_TAG_pointer_type";
8155 case DW_TAG_reference_type
:
8156 return "DW_TAG_reference_type";
8157 case DW_TAG_compile_unit
:
8158 return "DW_TAG_compile_unit";
8159 case DW_TAG_string_type
:
8160 return "DW_TAG_string_type";
8161 case DW_TAG_structure_type
:
8162 return "DW_TAG_structure_type";
8163 case DW_TAG_subroutine_type
:
8164 return "DW_TAG_subroutine_type";
8165 case DW_TAG_typedef
:
8166 return "DW_TAG_typedef";
8167 case DW_TAG_union_type
:
8168 return "DW_TAG_union_type";
8169 case DW_TAG_unspecified_parameters
:
8170 return "DW_TAG_unspecified_parameters";
8171 case DW_TAG_variant
:
8172 return "DW_TAG_variant";
8173 case DW_TAG_common_block
:
8174 return "DW_TAG_common_block";
8175 case DW_TAG_common_inclusion
:
8176 return "DW_TAG_common_inclusion";
8177 case DW_TAG_inheritance
:
8178 return "DW_TAG_inheritance";
8179 case DW_TAG_inlined_subroutine
:
8180 return "DW_TAG_inlined_subroutine";
8182 return "DW_TAG_module";
8183 case DW_TAG_ptr_to_member_type
:
8184 return "DW_TAG_ptr_to_member_type";
8185 case DW_TAG_set_type
:
8186 return "DW_TAG_set_type";
8187 case DW_TAG_subrange_type
:
8188 return "DW_TAG_subrange_type";
8189 case DW_TAG_with_stmt
:
8190 return "DW_TAG_with_stmt";
8191 case DW_TAG_access_declaration
:
8192 return "DW_TAG_access_declaration";
8193 case DW_TAG_base_type
:
8194 return "DW_TAG_base_type";
8195 case DW_TAG_catch_block
:
8196 return "DW_TAG_catch_block";
8197 case DW_TAG_const_type
:
8198 return "DW_TAG_const_type";
8199 case DW_TAG_constant
:
8200 return "DW_TAG_constant";
8201 case DW_TAG_enumerator
:
8202 return "DW_TAG_enumerator";
8203 case DW_TAG_file_type
:
8204 return "DW_TAG_file_type";
8206 return "DW_TAG_friend";
8207 case DW_TAG_namelist
:
8208 return "DW_TAG_namelist";
8209 case DW_TAG_namelist_item
:
8210 return "DW_TAG_namelist_item";
8211 case DW_TAG_packed_type
:
8212 return "DW_TAG_packed_type";
8213 case DW_TAG_subprogram
:
8214 return "DW_TAG_subprogram";
8215 case DW_TAG_template_type_param
:
8216 return "DW_TAG_template_type_param";
8217 case DW_TAG_template_value_param
:
8218 return "DW_TAG_template_value_param";
8219 case DW_TAG_thrown_type
:
8220 return "DW_TAG_thrown_type";
8221 case DW_TAG_try_block
:
8222 return "DW_TAG_try_block";
8223 case DW_TAG_variant_part
:
8224 return "DW_TAG_variant_part";
8225 case DW_TAG_variable
:
8226 return "DW_TAG_variable";
8227 case DW_TAG_volatile_type
:
8228 return "DW_TAG_volatile_type";
8229 case DW_TAG_dwarf_procedure
:
8230 return "DW_TAG_dwarf_procedure";
8231 case DW_TAG_restrict_type
:
8232 return "DW_TAG_restrict_type";
8233 case DW_TAG_interface_type
:
8234 return "DW_TAG_interface_type";
8235 case DW_TAG_namespace
:
8236 return "DW_TAG_namespace";
8237 case DW_TAG_imported_module
:
8238 return "DW_TAG_imported_module";
8239 case DW_TAG_unspecified_type
:
8240 return "DW_TAG_unspecified_type";
8241 case DW_TAG_partial_unit
:
8242 return "DW_TAG_partial_unit";
8243 case DW_TAG_imported_unit
:
8244 return "DW_TAG_imported_unit";
8245 case DW_TAG_condition
:
8246 return "DW_TAG_condition";
8247 case DW_TAG_shared_type
:
8248 return "DW_TAG_shared_type";
8249 case DW_TAG_MIPS_loop
:
8250 return "DW_TAG_MIPS_loop";
8251 case DW_TAG_HP_array_descriptor
:
8252 return "DW_TAG_HP_array_descriptor";
8253 case DW_TAG_format_label
:
8254 return "DW_TAG_format_label";
8255 case DW_TAG_function_template
:
8256 return "DW_TAG_function_template";
8257 case DW_TAG_class_template
:
8258 return "DW_TAG_class_template";
8259 case DW_TAG_GNU_BINCL
:
8260 return "DW_TAG_GNU_BINCL";
8261 case DW_TAG_GNU_EINCL
:
8262 return "DW_TAG_GNU_EINCL";
8263 case DW_TAG_upc_shared_type
:
8264 return "DW_TAG_upc_shared_type";
8265 case DW_TAG_upc_strict_type
:
8266 return "DW_TAG_upc_strict_type";
8267 case DW_TAG_upc_relaxed_type
:
8268 return "DW_TAG_upc_relaxed_type";
8269 case DW_TAG_PGI_kanji_type
:
8270 return "DW_TAG_PGI_kanji_type";
8271 case DW_TAG_PGI_interface_block
:
8272 return "DW_TAG_PGI_interface_block";
8274 return "DW_TAG_<unknown>";
8278 /* Convert a DWARF attribute code into its string name. */
8281 dwarf_attr_name (unsigned attr
)
8286 return "DW_AT_sibling";
8287 case DW_AT_location
:
8288 return "DW_AT_location";
8290 return "DW_AT_name";
8291 case DW_AT_ordering
:
8292 return "DW_AT_ordering";
8293 case DW_AT_subscr_data
:
8294 return "DW_AT_subscr_data";
8295 case DW_AT_byte_size
:
8296 return "DW_AT_byte_size";
8297 case DW_AT_bit_offset
:
8298 return "DW_AT_bit_offset";
8299 case DW_AT_bit_size
:
8300 return "DW_AT_bit_size";
8301 case DW_AT_element_list
:
8302 return "DW_AT_element_list";
8303 case DW_AT_stmt_list
:
8304 return "DW_AT_stmt_list";
8306 return "DW_AT_low_pc";
8308 return "DW_AT_high_pc";
8309 case DW_AT_language
:
8310 return "DW_AT_language";
8312 return "DW_AT_member";
8314 return "DW_AT_discr";
8315 case DW_AT_discr_value
:
8316 return "DW_AT_discr_value";
8317 case DW_AT_visibility
:
8318 return "DW_AT_visibility";
8320 return "DW_AT_import";
8321 case DW_AT_string_length
:
8322 return "DW_AT_string_length";
8323 case DW_AT_common_reference
:
8324 return "DW_AT_common_reference";
8325 case DW_AT_comp_dir
:
8326 return "DW_AT_comp_dir";
8327 case DW_AT_const_value
:
8328 return "DW_AT_const_value";
8329 case DW_AT_containing_type
:
8330 return "DW_AT_containing_type";
8331 case DW_AT_default_value
:
8332 return "DW_AT_default_value";
8334 return "DW_AT_inline";
8335 case DW_AT_is_optional
:
8336 return "DW_AT_is_optional";
8337 case DW_AT_lower_bound
:
8338 return "DW_AT_lower_bound";
8339 case DW_AT_producer
:
8340 return "DW_AT_producer";
8341 case DW_AT_prototyped
:
8342 return "DW_AT_prototyped";
8343 case DW_AT_return_addr
:
8344 return "DW_AT_return_addr";
8345 case DW_AT_start_scope
:
8346 return "DW_AT_start_scope";
8347 case DW_AT_bit_stride
:
8348 return "DW_AT_bit_stride";
8349 case DW_AT_upper_bound
:
8350 return "DW_AT_upper_bound";
8351 case DW_AT_abstract_origin
:
8352 return "DW_AT_abstract_origin";
8353 case DW_AT_accessibility
:
8354 return "DW_AT_accessibility";
8355 case DW_AT_address_class
:
8356 return "DW_AT_address_class";
8357 case DW_AT_artificial
:
8358 return "DW_AT_artificial";
8359 case DW_AT_base_types
:
8360 return "DW_AT_base_types";
8361 case DW_AT_calling_convention
:
8362 return "DW_AT_calling_convention";
8364 return "DW_AT_count";
8365 case DW_AT_data_member_location
:
8366 return "DW_AT_data_member_location";
8367 case DW_AT_decl_column
:
8368 return "DW_AT_decl_column";
8369 case DW_AT_decl_file
:
8370 return "DW_AT_decl_file";
8371 case DW_AT_decl_line
:
8372 return "DW_AT_decl_line";
8373 case DW_AT_declaration
:
8374 return "DW_AT_declaration";
8375 case DW_AT_discr_list
:
8376 return "DW_AT_discr_list";
8377 case DW_AT_encoding
:
8378 return "DW_AT_encoding";
8379 case DW_AT_external
:
8380 return "DW_AT_external";
8381 case DW_AT_frame_base
:
8382 return "DW_AT_frame_base";
8384 return "DW_AT_friend";
8385 case DW_AT_identifier_case
:
8386 return "DW_AT_identifier_case";
8387 case DW_AT_macro_info
:
8388 return "DW_AT_macro_info";
8389 case DW_AT_namelist_items
:
8390 return "DW_AT_namelist_items";
8391 case DW_AT_priority
:
8392 return "DW_AT_priority";
8394 return "DW_AT_segment";
8395 case DW_AT_specification
:
8396 return "DW_AT_specification";
8397 case DW_AT_static_link
:
8398 return "DW_AT_static_link";
8400 return "DW_AT_type";
8401 case DW_AT_use_location
:
8402 return "DW_AT_use_location";
8403 case DW_AT_variable_parameter
:
8404 return "DW_AT_variable_parameter";
8405 case DW_AT_virtuality
:
8406 return "DW_AT_virtuality";
8407 case DW_AT_vtable_elem_location
:
8408 return "DW_AT_vtable_elem_location";
8409 /* DWARF 3 values. */
8410 case DW_AT_allocated
:
8411 return "DW_AT_allocated";
8412 case DW_AT_associated
:
8413 return "DW_AT_associated";
8414 case DW_AT_data_location
:
8415 return "DW_AT_data_location";
8416 case DW_AT_byte_stride
:
8417 return "DW_AT_byte_stride";
8418 case DW_AT_entry_pc
:
8419 return "DW_AT_entry_pc";
8420 case DW_AT_use_UTF8
:
8421 return "DW_AT_use_UTF8";
8422 case DW_AT_extension
:
8423 return "DW_AT_extension";
8425 return "DW_AT_ranges";
8426 case DW_AT_trampoline
:
8427 return "DW_AT_trampoline";
8428 case DW_AT_call_column
:
8429 return "DW_AT_call_column";
8430 case DW_AT_call_file
:
8431 return "DW_AT_call_file";
8432 case DW_AT_call_line
:
8433 return "DW_AT_call_line";
8434 case DW_AT_description
:
8435 return "DW_AT_description";
8436 case DW_AT_binary_scale
:
8437 return "DW_AT_binary_scale";
8438 case DW_AT_decimal_scale
:
8439 return "DW_AT_decimal_scale";
8441 return "DW_AT_small";
8442 case DW_AT_decimal_sign
:
8443 return "DW_AT_decimal_sign";
8444 case DW_AT_digit_count
:
8445 return "DW_AT_digit_count";
8446 case DW_AT_picture_string
:
8447 return "DW_AT_picture_string";
8449 return "DW_AT_mutable";
8450 case DW_AT_threads_scaled
:
8451 return "DW_AT_threads_scaled";
8452 case DW_AT_explicit
:
8453 return "DW_AT_explicit";
8454 case DW_AT_object_pointer
:
8455 return "DW_AT_object_pointer";
8456 case DW_AT_endianity
:
8457 return "DW_AT_endianity";
8458 case DW_AT_elemental
:
8459 return "DW_AT_elemental";
8461 return "DW_AT_pure";
8462 case DW_AT_recursive
:
8463 return "DW_AT_recursive";
8465 /* SGI/MIPS extensions. */
8466 case DW_AT_MIPS_fde
:
8467 return "DW_AT_MIPS_fde";
8468 case DW_AT_MIPS_loop_begin
:
8469 return "DW_AT_MIPS_loop_begin";
8470 case DW_AT_MIPS_tail_loop_begin
:
8471 return "DW_AT_MIPS_tail_loop_begin";
8472 case DW_AT_MIPS_epilog_begin
:
8473 return "DW_AT_MIPS_epilog_begin";
8474 case DW_AT_MIPS_loop_unroll_factor
:
8475 return "DW_AT_MIPS_loop_unroll_factor";
8476 case DW_AT_MIPS_software_pipeline_depth
:
8477 return "DW_AT_MIPS_software_pipeline_depth";
8478 case DW_AT_MIPS_linkage_name
:
8479 return "DW_AT_MIPS_linkage_name";
8480 case DW_AT_MIPS_stride
:
8481 return "DW_AT_MIPS_stride";
8482 case DW_AT_MIPS_abstract_name
:
8483 return "DW_AT_MIPS_abstract_name";
8484 case DW_AT_MIPS_clone_origin
:
8485 return "DW_AT_MIPS_clone_origin";
8486 case DW_AT_MIPS_has_inlines
:
8487 return "DW_AT_MIPS_has_inlines";
8489 /* HP extensions. */
8490 case DW_AT_HP_block_index
:
8491 return "DW_AT_HP_block_index";
8492 case DW_AT_HP_unmodifiable
:
8493 return "DW_AT_HP_unmodifiable";
8494 case DW_AT_HP_actuals_stmt_list
:
8495 return "DW_AT_HP_actuals_stmt_list";
8496 case DW_AT_HP_proc_per_section
:
8497 return "DW_AT_HP_proc_per_section";
8498 case DW_AT_HP_raw_data_ptr
:
8499 return "DW_AT_HP_raw_data_ptr";
8500 case DW_AT_HP_pass_by_reference
:
8501 return "DW_AT_HP_pass_by_reference";
8502 case DW_AT_HP_opt_level
:
8503 return "DW_AT_HP_opt_level";
8504 case DW_AT_HP_prof_version_id
:
8505 return "DW_AT_HP_prof_version_id";
8506 case DW_AT_HP_opt_flags
:
8507 return "DW_AT_HP_opt_flags";
8508 case DW_AT_HP_cold_region_low_pc
:
8509 return "DW_AT_HP_cold_region_low_pc";
8510 case DW_AT_HP_cold_region_high_pc
:
8511 return "DW_AT_HP_cold_region_high_pc";
8512 case DW_AT_HP_all_variables_modifiable
:
8513 return "DW_AT_HP_all_variables_modifiable";
8514 case DW_AT_HP_linkage_name
:
8515 return "DW_AT_HP_linkage_name";
8516 case DW_AT_HP_prof_flags
:
8517 return "DW_AT_HP_prof_flags";
8518 /* GNU extensions. */
8519 case DW_AT_sf_names
:
8520 return "DW_AT_sf_names";
8521 case DW_AT_src_info
:
8522 return "DW_AT_src_info";
8523 case DW_AT_mac_info
:
8524 return "DW_AT_mac_info";
8525 case DW_AT_src_coords
:
8526 return "DW_AT_src_coords";
8527 case DW_AT_body_begin
:
8528 return "DW_AT_body_begin";
8529 case DW_AT_body_end
:
8530 return "DW_AT_body_end";
8531 case DW_AT_GNU_vector
:
8532 return "DW_AT_GNU_vector";
8533 /* VMS extensions. */
8534 case DW_AT_VMS_rtnbeg_pd_address
:
8535 return "DW_AT_VMS_rtnbeg_pd_address";
8536 /* UPC extension. */
8537 case DW_AT_upc_threads_scaled
:
8538 return "DW_AT_upc_threads_scaled";
8539 /* PGI (STMicroelectronics) extensions. */
8540 case DW_AT_PGI_lbase
:
8541 return "DW_AT_PGI_lbase";
8542 case DW_AT_PGI_soffset
:
8543 return "DW_AT_PGI_soffset";
8544 case DW_AT_PGI_lstride
:
8545 return "DW_AT_PGI_lstride";
8547 return "DW_AT_<unknown>";
8551 /* Convert a DWARF value form code into its string name. */
8554 dwarf_form_name (unsigned form
)
8559 return "DW_FORM_addr";
8560 case DW_FORM_block2
:
8561 return "DW_FORM_block2";
8562 case DW_FORM_block4
:
8563 return "DW_FORM_block4";
8565 return "DW_FORM_data2";
8567 return "DW_FORM_data4";
8569 return "DW_FORM_data8";
8570 case DW_FORM_string
:
8571 return "DW_FORM_string";
8573 return "DW_FORM_block";
8574 case DW_FORM_block1
:
8575 return "DW_FORM_block1";
8577 return "DW_FORM_data1";
8579 return "DW_FORM_flag";
8581 return "DW_FORM_sdata";
8583 return "DW_FORM_strp";
8585 return "DW_FORM_udata";
8586 case DW_FORM_ref_addr
:
8587 return "DW_FORM_ref_addr";
8589 return "DW_FORM_ref1";
8591 return "DW_FORM_ref2";
8593 return "DW_FORM_ref4";
8595 return "DW_FORM_ref8";
8596 case DW_FORM_ref_udata
:
8597 return "DW_FORM_ref_udata";
8598 case DW_FORM_indirect
:
8599 return "DW_FORM_indirect";
8601 return "DW_FORM_<unknown>";
8605 /* Convert a DWARF stack opcode into its string name. */
8608 dwarf_stack_op_name (unsigned op
)
8613 return "DW_OP_addr";
8615 return "DW_OP_deref";
8617 return "DW_OP_const1u";
8619 return "DW_OP_const1s";
8621 return "DW_OP_const2u";
8623 return "DW_OP_const2s";
8625 return "DW_OP_const4u";
8627 return "DW_OP_const4s";
8629 return "DW_OP_const8u";
8631 return "DW_OP_const8s";
8633 return "DW_OP_constu";
8635 return "DW_OP_consts";
8639 return "DW_OP_drop";
8641 return "DW_OP_over";
8643 return "DW_OP_pick";
8645 return "DW_OP_swap";
8649 return "DW_OP_xderef";
8657 return "DW_OP_minus";
8669 return "DW_OP_plus";
8670 case DW_OP_plus_uconst
:
8671 return "DW_OP_plus_uconst";
8677 return "DW_OP_shra";
8695 return "DW_OP_skip";
8697 return "DW_OP_lit0";
8699 return "DW_OP_lit1";
8701 return "DW_OP_lit2";
8703 return "DW_OP_lit3";
8705 return "DW_OP_lit4";
8707 return "DW_OP_lit5";
8709 return "DW_OP_lit6";
8711 return "DW_OP_lit7";
8713 return "DW_OP_lit8";
8715 return "DW_OP_lit9";
8717 return "DW_OP_lit10";
8719 return "DW_OP_lit11";
8721 return "DW_OP_lit12";
8723 return "DW_OP_lit13";
8725 return "DW_OP_lit14";
8727 return "DW_OP_lit15";
8729 return "DW_OP_lit16";
8731 return "DW_OP_lit17";
8733 return "DW_OP_lit18";
8735 return "DW_OP_lit19";
8737 return "DW_OP_lit20";
8739 return "DW_OP_lit21";
8741 return "DW_OP_lit22";
8743 return "DW_OP_lit23";
8745 return "DW_OP_lit24";
8747 return "DW_OP_lit25";
8749 return "DW_OP_lit26";
8751 return "DW_OP_lit27";
8753 return "DW_OP_lit28";
8755 return "DW_OP_lit29";
8757 return "DW_OP_lit30";
8759 return "DW_OP_lit31";
8761 return "DW_OP_reg0";
8763 return "DW_OP_reg1";
8765 return "DW_OP_reg2";
8767 return "DW_OP_reg3";
8769 return "DW_OP_reg4";
8771 return "DW_OP_reg5";
8773 return "DW_OP_reg6";
8775 return "DW_OP_reg7";
8777 return "DW_OP_reg8";
8779 return "DW_OP_reg9";
8781 return "DW_OP_reg10";
8783 return "DW_OP_reg11";
8785 return "DW_OP_reg12";
8787 return "DW_OP_reg13";
8789 return "DW_OP_reg14";
8791 return "DW_OP_reg15";
8793 return "DW_OP_reg16";
8795 return "DW_OP_reg17";
8797 return "DW_OP_reg18";
8799 return "DW_OP_reg19";
8801 return "DW_OP_reg20";
8803 return "DW_OP_reg21";
8805 return "DW_OP_reg22";
8807 return "DW_OP_reg23";
8809 return "DW_OP_reg24";
8811 return "DW_OP_reg25";
8813 return "DW_OP_reg26";
8815 return "DW_OP_reg27";
8817 return "DW_OP_reg28";
8819 return "DW_OP_reg29";
8821 return "DW_OP_reg30";
8823 return "DW_OP_reg31";
8825 return "DW_OP_breg0";
8827 return "DW_OP_breg1";
8829 return "DW_OP_breg2";
8831 return "DW_OP_breg3";
8833 return "DW_OP_breg4";
8835 return "DW_OP_breg5";
8837 return "DW_OP_breg6";
8839 return "DW_OP_breg7";
8841 return "DW_OP_breg8";
8843 return "DW_OP_breg9";
8845 return "DW_OP_breg10";
8847 return "DW_OP_breg11";
8849 return "DW_OP_breg12";
8851 return "DW_OP_breg13";
8853 return "DW_OP_breg14";
8855 return "DW_OP_breg15";
8857 return "DW_OP_breg16";
8859 return "DW_OP_breg17";
8861 return "DW_OP_breg18";
8863 return "DW_OP_breg19";
8865 return "DW_OP_breg20";
8867 return "DW_OP_breg21";
8869 return "DW_OP_breg22";
8871 return "DW_OP_breg23";
8873 return "DW_OP_breg24";
8875 return "DW_OP_breg25";
8877 return "DW_OP_breg26";
8879 return "DW_OP_breg27";
8881 return "DW_OP_breg28";
8883 return "DW_OP_breg29";
8885 return "DW_OP_breg30";
8887 return "DW_OP_breg31";
8889 return "DW_OP_regx";
8891 return "DW_OP_fbreg";
8893 return "DW_OP_bregx";
8895 return "DW_OP_piece";
8896 case DW_OP_deref_size
:
8897 return "DW_OP_deref_size";
8898 case DW_OP_xderef_size
:
8899 return "DW_OP_xderef_size";
8902 /* DWARF 3 extensions. */
8903 case DW_OP_push_object_address
:
8904 return "DW_OP_push_object_address";
8906 return "DW_OP_call2";
8908 return "DW_OP_call4";
8909 case DW_OP_call_ref
:
8910 return "DW_OP_call_ref";
8911 /* GNU extensions. */
8912 case DW_OP_form_tls_address
:
8913 return "DW_OP_form_tls_address";
8914 case DW_OP_call_frame_cfa
:
8915 return "DW_OP_call_frame_cfa";
8916 case DW_OP_bit_piece
:
8917 return "DW_OP_bit_piece";
8918 case DW_OP_GNU_push_tls_address
:
8919 return "DW_OP_GNU_push_tls_address";
8920 case DW_OP_GNU_uninit
:
8921 return "DW_OP_GNU_uninit";
8922 /* HP extensions. */
8923 case DW_OP_HP_is_value
:
8924 return "DW_OP_HP_is_value";
8925 case DW_OP_HP_fltconst4
:
8926 return "DW_OP_HP_fltconst4";
8927 case DW_OP_HP_fltconst8
:
8928 return "DW_OP_HP_fltconst8";
8929 case DW_OP_HP_mod_range
:
8930 return "DW_OP_HP_mod_range";
8931 case DW_OP_HP_unmod_range
:
8932 return "DW_OP_HP_unmod_range";
8934 return "DW_OP_HP_tls";
8936 return "OP_<unknown>";
8941 dwarf_bool_name (unsigned mybool
)
8949 /* Convert a DWARF type code into its string name. */
8952 dwarf_type_encoding_name (unsigned enc
)
8957 return "DW_ATE_void";
8958 case DW_ATE_address
:
8959 return "DW_ATE_address";
8960 case DW_ATE_boolean
:
8961 return "DW_ATE_boolean";
8962 case DW_ATE_complex_float
:
8963 return "DW_ATE_complex_float";
8965 return "DW_ATE_float";
8967 return "DW_ATE_signed";
8968 case DW_ATE_signed_char
:
8969 return "DW_ATE_signed_char";
8970 case DW_ATE_unsigned
:
8971 return "DW_ATE_unsigned";
8972 case DW_ATE_unsigned_char
:
8973 return "DW_ATE_unsigned_char";
8975 case DW_ATE_imaginary_float
:
8976 return "DW_ATE_imaginary_float";
8977 case DW_ATE_packed_decimal
:
8978 return "DW_ATE_packed_decimal";
8979 case DW_ATE_numeric_string
:
8980 return "DW_ATE_numeric_string";
8982 return "DW_ATE_edited";
8983 case DW_ATE_signed_fixed
:
8984 return "DW_ATE_signed_fixed";
8985 case DW_ATE_unsigned_fixed
:
8986 return "DW_ATE_unsigned_fixed";
8987 case DW_ATE_decimal_float
:
8988 return "DW_ATE_decimal_float";
8989 /* HP extensions. */
8990 case DW_ATE_HP_float80
:
8991 return "DW_ATE_HP_float80";
8992 case DW_ATE_HP_complex_float80
:
8993 return "DW_ATE_HP_complex_float80";
8994 case DW_ATE_HP_float128
:
8995 return "DW_ATE_HP_float128";
8996 case DW_ATE_HP_complex_float128
:
8997 return "DW_ATE_HP_complex_float128";
8998 case DW_ATE_HP_floathpintel
:
8999 return "DW_ATE_HP_floathpintel";
9000 case DW_ATE_HP_imaginary_float80
:
9001 return "DW_ATE_HP_imaginary_float80";
9002 case DW_ATE_HP_imaginary_float128
:
9003 return "DW_ATE_HP_imaginary_float128";
9005 return "DW_ATE_<unknown>";
9009 /* Convert a DWARF call frame info operation to its string name. */
9013 dwarf_cfi_name (unsigned cfi_opc
)
9017 case DW_CFA_advance_loc
:
9018 return "DW_CFA_advance_loc";
9020 return "DW_CFA_offset";
9021 case DW_CFA_restore
:
9022 return "DW_CFA_restore";
9024 return "DW_CFA_nop";
9025 case DW_CFA_set_loc
:
9026 return "DW_CFA_set_loc";
9027 case DW_CFA_advance_loc1
:
9028 return "DW_CFA_advance_loc1";
9029 case DW_CFA_advance_loc2
:
9030 return "DW_CFA_advance_loc2";
9031 case DW_CFA_advance_loc4
:
9032 return "DW_CFA_advance_loc4";
9033 case DW_CFA_offset_extended
:
9034 return "DW_CFA_offset_extended";
9035 case DW_CFA_restore_extended
:
9036 return "DW_CFA_restore_extended";
9037 case DW_CFA_undefined
:
9038 return "DW_CFA_undefined";
9039 case DW_CFA_same_value
:
9040 return "DW_CFA_same_value";
9041 case DW_CFA_register
:
9042 return "DW_CFA_register";
9043 case DW_CFA_remember_state
:
9044 return "DW_CFA_remember_state";
9045 case DW_CFA_restore_state
:
9046 return "DW_CFA_restore_state";
9047 case DW_CFA_def_cfa
:
9048 return "DW_CFA_def_cfa";
9049 case DW_CFA_def_cfa_register
:
9050 return "DW_CFA_def_cfa_register";
9051 case DW_CFA_def_cfa_offset
:
9052 return "DW_CFA_def_cfa_offset";
9054 case DW_CFA_def_cfa_expression
:
9055 return "DW_CFA_def_cfa_expression";
9056 case DW_CFA_expression
:
9057 return "DW_CFA_expression";
9058 case DW_CFA_offset_extended_sf
:
9059 return "DW_CFA_offset_extended_sf";
9060 case DW_CFA_def_cfa_sf
:
9061 return "DW_CFA_def_cfa_sf";
9062 case DW_CFA_def_cfa_offset_sf
:
9063 return "DW_CFA_def_cfa_offset_sf";
9064 case DW_CFA_val_offset
:
9065 return "DW_CFA_val_offset";
9066 case DW_CFA_val_offset_sf
:
9067 return "DW_CFA_val_offset_sf";
9068 case DW_CFA_val_expression
:
9069 return "DW_CFA_val_expression";
9070 /* SGI/MIPS specific. */
9071 case DW_CFA_MIPS_advance_loc8
:
9072 return "DW_CFA_MIPS_advance_loc8";
9073 /* GNU extensions. */
9074 case DW_CFA_GNU_window_save
:
9075 return "DW_CFA_GNU_window_save";
9076 case DW_CFA_GNU_args_size
:
9077 return "DW_CFA_GNU_args_size";
9078 case DW_CFA_GNU_negative_offset_extended
:
9079 return "DW_CFA_GNU_negative_offset_extended";
9081 return "DW_CFA_<unknown>";
9087 dump_die (struct die_info
*die
)
9091 fprintf_unfiltered (gdb_stderr
, "Die: %s (abbrev = %d, offset = %d)\n",
9092 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
9093 fprintf_unfiltered (gdb_stderr
, "\thas children: %s\n",
9094 dwarf_bool_name (die
->child
!= NULL
));
9096 fprintf_unfiltered (gdb_stderr
, "\tattributes:\n");
9097 for (i
= 0; i
< die
->num_attrs
; ++i
)
9099 fprintf_unfiltered (gdb_stderr
, "\t\t%s (%s) ",
9100 dwarf_attr_name (die
->attrs
[i
].name
),
9101 dwarf_form_name (die
->attrs
[i
].form
));
9102 switch (die
->attrs
[i
].form
)
9104 case DW_FORM_ref_addr
:
9106 fprintf_unfiltered (gdb_stderr
, "address: ");
9107 fputs_filtered (paddress (DW_ADDR (&die
->attrs
[i
])), gdb_stderr
);
9109 case DW_FORM_block2
:
9110 case DW_FORM_block4
:
9112 case DW_FORM_block1
:
9113 fprintf_unfiltered (gdb_stderr
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
9118 fprintf_unfiltered (gdb_stderr
, "constant ref: %ld (adjusted)",
9119 (long) (DW_ADDR (&die
->attrs
[i
])));
9127 fprintf_unfiltered (gdb_stderr
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
9129 case DW_FORM_string
:
9131 fprintf_unfiltered (gdb_stderr
, "string: \"%s\"",
9132 DW_STRING (&die
->attrs
[i
])
9133 ? DW_STRING (&die
->attrs
[i
]) : "");
9136 if (DW_UNSND (&die
->attrs
[i
]))
9137 fprintf_unfiltered (gdb_stderr
, "flag: TRUE");
9139 fprintf_unfiltered (gdb_stderr
, "flag: FALSE");
9141 case DW_FORM_indirect
:
9142 /* the reader will have reduced the indirect form to
9143 the "base form" so this form should not occur */
9144 fprintf_unfiltered (gdb_stderr
, "unexpected attribute form: DW_FORM_indirect");
9147 fprintf_unfiltered (gdb_stderr
, "unsupported attribute form: %d.",
9148 die
->attrs
[i
].form
);
9150 fprintf_unfiltered (gdb_stderr
, "\n");
9155 dump_die_list (struct die_info
*die
)
9160 if (die
->child
!= NULL
)
9161 dump_die_list (die
->child
);
9162 if (die
->sibling
!= NULL
)
9163 dump_die_list (die
->sibling
);
9168 store_in_ref_table (unsigned int offset
, struct die_info
*die
,
9169 struct dwarf2_cu
*cu
)
9172 struct die_info
*old
;
9174 h
= (offset
% REF_HASH_SIZE
);
9175 old
= cu
->die_ref_table
[h
];
9176 die
->next_ref
= old
;
9177 cu
->die_ref_table
[h
] = die
;
9181 dwarf2_get_ref_die_offset (struct attribute
*attr
, struct dwarf2_cu
*cu
)
9183 unsigned int result
= 0;
9187 case DW_FORM_ref_addr
:
9192 case DW_FORM_ref_udata
:
9193 result
= DW_ADDR (attr
);
9196 complaint (&symfile_complaints
,
9197 _("unsupported die ref attribute form: '%s'"),
9198 dwarf_form_name (attr
->form
));
9203 /* Return the constant value held by the given attribute. Return -1
9204 if the value held by the attribute is not constant. */
9207 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
9209 if (attr
->form
== DW_FORM_sdata
)
9210 return DW_SND (attr
);
9211 else if (attr
->form
== DW_FORM_udata
9212 || attr
->form
== DW_FORM_data1
9213 || attr
->form
== DW_FORM_data2
9214 || attr
->form
== DW_FORM_data4
9215 || attr
->form
== DW_FORM_data8
)
9216 return DW_UNSND (attr
);
9219 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
9220 dwarf_form_name (attr
->form
));
9221 return default_value
;
9225 static struct die_info
*
9226 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
9227 struct dwarf2_cu
*cu
)
9229 struct die_info
*die
;
9230 unsigned int offset
;
9232 struct die_info temp_die
;
9233 struct dwarf2_cu
*target_cu
;
9235 offset
= dwarf2_get_ref_die_offset (attr
, cu
);
9237 if (DW_ADDR (attr
) < cu
->header
.offset
9238 || DW_ADDR (attr
) >= cu
->header
.offset
+ cu
->header
.length
)
9240 struct dwarf2_per_cu_data
*per_cu
;
9241 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (attr
),
9243 target_cu
= per_cu
->cu
;
9248 h
= (offset
% REF_HASH_SIZE
);
9249 die
= target_cu
->die_ref_table
[h
];
9252 if (die
->offset
== offset
)
9254 die
= die
->next_ref
;
9257 error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE "
9258 "at 0x%lx [in module %s]"),
9259 (long) src_die
->offset
, (long) offset
, cu
->objfile
->name
);
9264 /* Decode simple location descriptions.
9265 Given a pointer to a dwarf block that defines a location, compute
9266 the location and return the value.
9268 NOTE drow/2003-11-18: This function is called in two situations
9269 now: for the address of static or global variables (partial symbols
9270 only) and for offsets into structures which are expected to be
9271 (more or less) constant. The partial symbol case should go away,
9272 and only the constant case should remain. That will let this
9273 function complain more accurately. A few special modes are allowed
9274 without complaint for global variables (for instance, global
9275 register values and thread-local values).
9277 A location description containing no operations indicates that the
9278 object is optimized out. The return value is 0 for that case.
9279 FIXME drow/2003-11-16: No callers check for this case any more; soon all
9280 callers will only want a very basic result and this can become a
9283 Note that stack[0] is unused except as a default error return.
9284 Note that stack overflow is not yet handled. */
9287 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
9289 struct objfile
*objfile
= cu
->objfile
;
9290 struct comp_unit_head
*cu_header
= &cu
->header
;
9292 int size
= blk
->size
;
9293 gdb_byte
*data
= blk
->data
;
9294 CORE_ADDR stack
[64];
9296 unsigned int bytes_read
, unsnd
;
9340 stack
[++stacki
] = op
- DW_OP_lit0
;
9375 stack
[++stacki
] = op
- DW_OP_reg0
;
9377 dwarf2_complex_location_expr_complaint ();
9381 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9383 stack
[++stacki
] = unsnd
;
9385 dwarf2_complex_location_expr_complaint ();
9389 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
9395 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
9400 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
9405 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
9410 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
9415 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
9420 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
9425 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
9431 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
9436 stack
[stacki
+ 1] = stack
[stacki
];
9441 stack
[stacki
- 1] += stack
[stacki
];
9445 case DW_OP_plus_uconst
:
9446 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9451 stack
[stacki
- 1] -= stack
[stacki
];
9456 /* If we're not the last op, then we definitely can't encode
9457 this using GDB's address_class enum. This is valid for partial
9458 global symbols, although the variable's address will be bogus
9461 dwarf2_complex_location_expr_complaint ();
9464 case DW_OP_GNU_push_tls_address
:
9465 /* The top of the stack has the offset from the beginning
9466 of the thread control block at which the variable is located. */
9467 /* Nothing should follow this operator, so the top of stack would
9469 /* This is valid for partial global symbols, but the variable's
9470 address will be bogus in the psymtab. */
9472 dwarf2_complex_location_expr_complaint ();
9475 case DW_OP_GNU_uninit
:
9479 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
9480 dwarf_stack_op_name (op
));
9481 return (stack
[stacki
]);
9484 return (stack
[stacki
]);
9487 /* memory allocation interface */
9489 static struct dwarf_block
*
9490 dwarf_alloc_block (struct dwarf2_cu
*cu
)
9492 struct dwarf_block
*blk
;
9494 blk
= (struct dwarf_block
*)
9495 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
9499 static struct abbrev_info
*
9500 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
9502 struct abbrev_info
*abbrev
;
9504 abbrev
= (struct abbrev_info
*)
9505 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
9506 memset (abbrev
, 0, sizeof (struct abbrev_info
));
9510 static struct die_info
*
9511 dwarf_alloc_die (void)
9513 struct die_info
*die
;
9515 die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
9516 memset (die
, 0, sizeof (struct die_info
));
9521 /* Macro support. */
9524 /* Return the full name of file number I in *LH's file name table.
9525 Use COMP_DIR as the name of the current directory of the
9526 compilation. The result is allocated using xmalloc; the caller is
9527 responsible for freeing it. */
9529 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
9531 /* Is the file number a valid index into the line header's file name
9532 table? Remember that file numbers start with one, not zero. */
9533 if (1 <= file
&& file
<= lh
->num_file_names
)
9535 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
9537 if (IS_ABSOLUTE_PATH (fe
->name
))
9538 return xstrdup (fe
->name
);
9546 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9552 dir_len
= strlen (dir
);
9553 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
9554 strcpy (full_name
, dir
);
9555 full_name
[dir_len
] = '/';
9556 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
9560 return xstrdup (fe
->name
);
9565 /* The compiler produced a bogus file number. We can at least
9566 record the macro definitions made in the file, even if we
9567 won't be able to find the file by name. */
9569 sprintf (fake_name
, "<bad macro file number %d>", file
);
9571 complaint (&symfile_complaints
,
9572 _("bad file number in macro information (%d)"),
9575 return xstrdup (fake_name
);
9580 static struct macro_source_file
*
9581 macro_start_file (int file
, int line
,
9582 struct macro_source_file
*current_file
,
9583 const char *comp_dir
,
9584 struct line_header
*lh
, struct objfile
*objfile
)
9586 /* The full name of this source file. */
9587 char *full_name
= file_full_name (file
, lh
, comp_dir
);
9589 /* We don't create a macro table for this compilation unit
9590 at all until we actually get a filename. */
9591 if (! pending_macros
)
9592 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
9593 objfile
->macro_cache
);
9596 /* If we have no current file, then this must be the start_file
9597 directive for the compilation unit's main source file. */
9598 current_file
= macro_set_main (pending_macros
, full_name
);
9600 current_file
= macro_include (current_file
, line
, full_name
);
9604 return current_file
;
9608 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
9609 followed by a null byte. */
9611 copy_string (const char *buf
, int len
)
9613 char *s
= xmalloc (len
+ 1);
9614 memcpy (s
, buf
, len
);
9622 consume_improper_spaces (const char *p
, const char *body
)
9626 complaint (&symfile_complaints
,
9627 _("macro definition contains spaces in formal argument list:\n`%s'"),
9639 parse_macro_definition (struct macro_source_file
*file
, int line
,
9644 /* The body string takes one of two forms. For object-like macro
9645 definitions, it should be:
9647 <macro name> " " <definition>
9649 For function-like macro definitions, it should be:
9651 <macro name> "() " <definition>
9653 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
9655 Spaces may appear only where explicitly indicated, and in the
9658 The Dwarf 2 spec says that an object-like macro's name is always
9659 followed by a space, but versions of GCC around March 2002 omit
9660 the space when the macro's definition is the empty string.
9662 The Dwarf 2 spec says that there should be no spaces between the
9663 formal arguments in a function-like macro's formal argument list,
9664 but versions of GCC around March 2002 include spaces after the
9668 /* Find the extent of the macro name. The macro name is terminated
9669 by either a space or null character (for an object-like macro) or
9670 an opening paren (for a function-like macro). */
9671 for (p
= body
; *p
; p
++)
9672 if (*p
== ' ' || *p
== '(')
9675 if (*p
== ' ' || *p
== '\0')
9677 /* It's an object-like macro. */
9678 int name_len
= p
- body
;
9679 char *name
= copy_string (body
, name_len
);
9680 const char *replacement
;
9683 replacement
= body
+ name_len
+ 1;
9686 dwarf2_macro_malformed_definition_complaint (body
);
9687 replacement
= body
+ name_len
;
9690 macro_define_object (file
, line
, name
, replacement
);
9696 /* It's a function-like macro. */
9697 char *name
= copy_string (body
, p
- body
);
9700 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
9704 p
= consume_improper_spaces (p
, body
);
9706 /* Parse the formal argument list. */
9707 while (*p
&& *p
!= ')')
9709 /* Find the extent of the current argument name. */
9710 const char *arg_start
= p
;
9712 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
9715 if (! *p
|| p
== arg_start
)
9716 dwarf2_macro_malformed_definition_complaint (body
);
9719 /* Make sure argv has room for the new argument. */
9720 if (argc
>= argv_size
)
9723 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
9726 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
9729 p
= consume_improper_spaces (p
, body
);
9731 /* Consume the comma, if present. */
9736 p
= consume_improper_spaces (p
, body
);
9745 /* Perfectly formed definition, no complaints. */
9746 macro_define_function (file
, line
, name
,
9747 argc
, (const char **) argv
,
9749 else if (*p
== '\0')
9751 /* Complain, but do define it. */
9752 dwarf2_macro_malformed_definition_complaint (body
);
9753 macro_define_function (file
, line
, name
,
9754 argc
, (const char **) argv
,
9758 /* Just complain. */
9759 dwarf2_macro_malformed_definition_complaint (body
);
9762 /* Just complain. */
9763 dwarf2_macro_malformed_definition_complaint (body
);
9769 for (i
= 0; i
< argc
; i
++)
9775 dwarf2_macro_malformed_definition_complaint (body
);
9780 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
9781 char *comp_dir
, bfd
*abfd
,
9782 struct dwarf2_cu
*cu
)
9784 gdb_byte
*mac_ptr
, *mac_end
;
9785 struct macro_source_file
*current_file
= 0;
9787 if (dwarf2_per_objfile
->macinfo_buffer
== NULL
)
9789 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
9793 mac_ptr
= dwarf2_per_objfile
->macinfo_buffer
+ offset
;
9794 mac_end
= dwarf2_per_objfile
->macinfo_buffer
9795 + dwarf2_per_objfile
->macinfo_size
;
9799 enum dwarf_macinfo_record_type macinfo_type
;
9801 /* Do we at least have room for a macinfo type byte? */
9802 if (mac_ptr
>= mac_end
)
9804 dwarf2_macros_too_long_complaint ();
9808 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
9811 switch (macinfo_type
)
9813 /* A zero macinfo type indicates the end of the macro
9818 case DW_MACINFO_define
:
9819 case DW_MACINFO_undef
:
9821 unsigned int bytes_read
;
9825 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9826 mac_ptr
+= bytes_read
;
9827 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
9828 mac_ptr
+= bytes_read
;
9831 complaint (&symfile_complaints
,
9832 _("debug info gives macro %s outside of any file: %s"),
9834 DW_MACINFO_define
? "definition" : macinfo_type
==
9835 DW_MACINFO_undef
? "undefinition" :
9836 "something-or-other", body
);
9839 if (macinfo_type
== DW_MACINFO_define
)
9840 parse_macro_definition (current_file
, line
, body
);
9841 else if (macinfo_type
== DW_MACINFO_undef
)
9842 macro_undef (current_file
, line
, body
);
9847 case DW_MACINFO_start_file
:
9849 unsigned int bytes_read
;
9852 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9853 mac_ptr
+= bytes_read
;
9854 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9855 mac_ptr
+= bytes_read
;
9857 current_file
= macro_start_file (file
, line
,
9858 current_file
, comp_dir
,
9863 case DW_MACINFO_end_file
:
9865 complaint (&symfile_complaints
,
9866 _("macro debug info has an unmatched `close_file' directive"));
9869 current_file
= current_file
->included_by
;
9872 enum dwarf_macinfo_record_type next_type
;
9874 /* GCC circa March 2002 doesn't produce the zero
9875 type byte marking the end of the compilation
9876 unit. Complain if it's not there, but exit no
9879 /* Do we at least have room for a macinfo type byte? */
9880 if (mac_ptr
>= mac_end
)
9882 dwarf2_macros_too_long_complaint ();
9886 /* We don't increment mac_ptr here, so this is just
9888 next_type
= read_1_byte (abfd
, mac_ptr
);
9890 complaint (&symfile_complaints
,
9891 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
9898 case DW_MACINFO_vendor_ext
:
9900 unsigned int bytes_read
;
9904 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9905 mac_ptr
+= bytes_read
;
9906 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
9907 mac_ptr
+= bytes_read
;
9909 /* We don't recognize any vendor extensions. */
9916 /* Check if the attribute's form is a DW_FORM_block*
9917 if so return true else false. */
9919 attr_form_is_block (struct attribute
*attr
)
9921 return (attr
== NULL
? 0 :
9922 attr
->form
== DW_FORM_block1
9923 || attr
->form
== DW_FORM_block2
9924 || attr
->form
== DW_FORM_block4
9925 || attr
->form
== DW_FORM_block
);
9928 /* Return non-zero if ATTR's value is a section offset --- classes
9929 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
9930 You may use DW_UNSND (attr) to retrieve such offsets.
9932 Section 7.5.4, "Attribute Encodings", explains that no attribute
9933 may have a value that belongs to more than one of these classes; it
9934 would be ambiguous if we did, because we use the same forms for all
9937 attr_form_is_section_offset (struct attribute
*attr
)
9939 return (attr
->form
== DW_FORM_data4
9940 || attr
->form
== DW_FORM_data8
);
9944 /* Return non-zero if ATTR's value falls in the 'constant' class, or
9945 zero otherwise. When this function returns true, you can apply
9946 dwarf2_get_attr_constant_value to it.
9948 However, note that for some attributes you must check
9949 attr_form_is_section_offset before using this test. DW_FORM_data4
9950 and DW_FORM_data8 are members of both the constant class, and of
9951 the classes that contain offsets into other debug sections
9952 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
9953 that, if an attribute's can be either a constant or one of the
9954 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
9955 taken as section offsets, not constants. */
9957 attr_form_is_constant (struct attribute
*attr
)
9974 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
9975 struct dwarf2_cu
*cu
)
9977 if (attr_form_is_section_offset (attr
)
9978 /* ".debug_loc" may not exist at all, or the offset may be outside
9979 the section. If so, fall through to the complaint in the
9981 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc_size
)
9983 struct dwarf2_loclist_baton
*baton
;
9985 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9986 sizeof (struct dwarf2_loclist_baton
));
9987 baton
->per_cu
= cu
->per_cu
;
9988 gdb_assert (baton
->per_cu
);
9990 /* We don't know how long the location list is, but make sure we
9991 don't run off the edge of the section. */
9992 baton
->size
= dwarf2_per_objfile
->loc_size
- DW_UNSND (attr
);
9993 baton
->data
= dwarf2_per_objfile
->loc_buffer
+ DW_UNSND (attr
);
9994 baton
->base_address
= cu
->header
.base_address
;
9995 if (cu
->header
.base_known
== 0)
9996 complaint (&symfile_complaints
,
9997 _("Location list used without specifying the CU base address."));
9999 SYMBOL_OPS (sym
) = &dwarf2_loclist_funcs
;
10000 SYMBOL_LOCATION_BATON (sym
) = baton
;
10004 struct dwarf2_locexpr_baton
*baton
;
10006 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
10007 sizeof (struct dwarf2_locexpr_baton
));
10008 baton
->per_cu
= cu
->per_cu
;
10009 gdb_assert (baton
->per_cu
);
10011 if (attr_form_is_block (attr
))
10013 /* Note that we're just copying the block's data pointer
10014 here, not the actual data. We're still pointing into the
10015 info_buffer for SYM's objfile; right now we never release
10016 that buffer, but when we do clean up properly this may
10018 baton
->size
= DW_BLOCK (attr
)->size
;
10019 baton
->data
= DW_BLOCK (attr
)->data
;
10023 dwarf2_invalid_attrib_class_complaint ("location description",
10024 SYMBOL_NATURAL_NAME (sym
));
10026 baton
->data
= NULL
;
10029 SYMBOL_OPS (sym
) = &dwarf2_locexpr_funcs
;
10030 SYMBOL_LOCATION_BATON (sym
) = baton
;
10034 /* Return the OBJFILE associated with the compilation unit CU. */
10037 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
10039 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
10041 /* Return the master objfile, so that we can report and look up the
10042 correct file containing this variable. */
10043 if (objfile
->separate_debug_objfile_backlink
)
10044 objfile
= objfile
->separate_debug_objfile_backlink
;
10049 /* Return the address size given in the compilation unit header for CU. */
10052 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
10055 return per_cu
->cu
->header
.addr_size
;
10058 /* If the CU is not currently read in, we re-read its header. */
10059 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
10060 struct dwarf2_per_objfile
*per_objfile
10061 = objfile_data (objfile
, dwarf2_objfile_data_key
);
10062 gdb_byte
*info_ptr
= per_objfile
->info_buffer
+ per_cu
->offset
;
10064 struct comp_unit_head cu_header
;
10065 memset (&cu_header
, 0, sizeof cu_header
);
10066 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
10067 return cu_header
.addr_size
;
10071 /* Locate the compilation unit from CU's objfile which contains the
10072 DIE at OFFSET. Raises an error on failure. */
10074 static struct dwarf2_per_cu_data
*
10075 dwarf2_find_containing_comp_unit (unsigned long offset
,
10076 struct objfile
*objfile
)
10078 struct dwarf2_per_cu_data
*this_cu
;
10082 high
= dwarf2_per_objfile
->n_comp_units
- 1;
10085 int mid
= low
+ (high
- low
) / 2;
10086 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
10091 gdb_assert (low
== high
);
10092 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
10095 error (_("Dwarf Error: could not find partial DIE containing "
10096 "offset 0x%lx [in module %s]"),
10097 (long) offset
, bfd_get_filename (objfile
->obfd
));
10099 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
10100 return dwarf2_per_objfile
->all_comp_units
[low
-1];
10104 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
10105 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
10106 && offset
>= this_cu
->offset
+ this_cu
->length
)
10107 error (_("invalid dwarf2 offset %ld"), offset
);
10108 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
10113 /* Locate the compilation unit from OBJFILE which is located at exactly
10114 OFFSET. Raises an error on failure. */
10116 static struct dwarf2_per_cu_data
*
10117 dwarf2_find_comp_unit (unsigned long offset
, struct objfile
*objfile
)
10119 struct dwarf2_per_cu_data
*this_cu
;
10120 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
10121 if (this_cu
->offset
!= offset
)
10122 error (_("no compilation unit with offset %ld."), offset
);
10126 /* Release one cached compilation unit, CU. We unlink it from the tree
10127 of compilation units, but we don't remove it from the read_in_chain;
10128 the caller is responsible for that. */
10131 free_one_comp_unit (void *data
)
10133 struct dwarf2_cu
*cu
= data
;
10135 if (cu
->per_cu
!= NULL
)
10136 cu
->per_cu
->cu
= NULL
;
10139 obstack_free (&cu
->comp_unit_obstack
, NULL
);
10141 free_die_list (cu
->dies
);
10146 /* This cleanup function is passed the address of a dwarf2_cu on the stack
10147 when we're finished with it. We can't free the pointer itself, but be
10148 sure to unlink it from the cache. Also release any associated storage
10149 and perform cache maintenance.
10151 Only used during partial symbol parsing. */
10154 free_stack_comp_unit (void *data
)
10156 struct dwarf2_cu
*cu
= data
;
10158 obstack_free (&cu
->comp_unit_obstack
, NULL
);
10159 cu
->partial_dies
= NULL
;
10161 if (cu
->per_cu
!= NULL
)
10163 /* This compilation unit is on the stack in our caller, so we
10164 should not xfree it. Just unlink it. */
10165 cu
->per_cu
->cu
= NULL
;
10168 /* If we had a per-cu pointer, then we may have other compilation
10169 units loaded, so age them now. */
10170 age_cached_comp_units ();
10174 /* Free all cached compilation units. */
10177 free_cached_comp_units (void *data
)
10179 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
10181 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10182 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10183 while (per_cu
!= NULL
)
10185 struct dwarf2_per_cu_data
*next_cu
;
10187 next_cu
= per_cu
->cu
->read_in_chain
;
10189 free_one_comp_unit (per_cu
->cu
);
10190 *last_chain
= next_cu
;
10196 /* Increase the age counter on each cached compilation unit, and free
10197 any that are too old. */
10200 age_cached_comp_units (void)
10202 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
10204 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
10205 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10206 while (per_cu
!= NULL
)
10208 per_cu
->cu
->last_used
++;
10209 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
10210 dwarf2_mark (per_cu
->cu
);
10211 per_cu
= per_cu
->cu
->read_in_chain
;
10214 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10215 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10216 while (per_cu
!= NULL
)
10218 struct dwarf2_per_cu_data
*next_cu
;
10220 next_cu
= per_cu
->cu
->read_in_chain
;
10222 if (!per_cu
->cu
->mark
)
10224 free_one_comp_unit (per_cu
->cu
);
10225 *last_chain
= next_cu
;
10228 last_chain
= &per_cu
->cu
->read_in_chain
;
10234 /* Remove a single compilation unit from the cache. */
10237 free_one_cached_comp_unit (void *target_cu
)
10239 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
10241 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10242 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10243 while (per_cu
!= NULL
)
10245 struct dwarf2_per_cu_data
*next_cu
;
10247 next_cu
= per_cu
->cu
->read_in_chain
;
10249 if (per_cu
->cu
== target_cu
)
10251 free_one_comp_unit (per_cu
->cu
);
10252 *last_chain
= next_cu
;
10256 last_chain
= &per_cu
->cu
->read_in_chain
;
10262 /* Release all extra memory associated with OBJFILE. */
10265 dwarf2_free_objfile (struct objfile
*objfile
)
10267 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
10269 if (dwarf2_per_objfile
== NULL
)
10272 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
10273 free_cached_comp_units (NULL
);
10275 /* Everything else should be on the objfile obstack. */
10278 /* A pair of DIE offset and GDB type pointer. We store these
10279 in a hash table separate from the DIEs, and preserve them
10280 when the DIEs are flushed out of cache. */
10282 struct dwarf2_offset_and_type
10284 unsigned int offset
;
10288 /* Hash function for a dwarf2_offset_and_type. */
10291 offset_and_type_hash (const void *item
)
10293 const struct dwarf2_offset_and_type
*ofs
= item
;
10294 return ofs
->offset
;
10297 /* Equality function for a dwarf2_offset_and_type. */
10300 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
10302 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
10303 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
10304 return ofs_lhs
->offset
== ofs_rhs
->offset
;
10307 /* Set the type associated with DIE to TYPE. Save it in CU's hash
10308 table if necessary. */
10311 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
10313 struct dwarf2_offset_and_type
**slot
, ofs
;
10317 if (cu
->per_cu
== NULL
)
10320 if (cu
->per_cu
->type_hash
== NULL
)
10321 cu
->per_cu
->type_hash
10322 = htab_create_alloc_ex (cu
->header
.length
/ 24,
10323 offset_and_type_hash
,
10324 offset_and_type_eq
,
10326 &cu
->objfile
->objfile_obstack
,
10327 hashtab_obstack_allocate
,
10328 dummy_obstack_deallocate
);
10330 ofs
.offset
= die
->offset
;
10332 slot
= (struct dwarf2_offset_and_type
**)
10333 htab_find_slot_with_hash (cu
->per_cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
10334 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
10338 /* Find the type for DIE in TYPE_HASH, or return NULL if DIE does not
10339 have a saved type. */
10341 static struct type
*
10342 get_die_type (struct die_info
*die
, htab_t type_hash
)
10344 struct dwarf2_offset_and_type
*slot
, ofs
;
10346 ofs
.offset
= die
->offset
;
10347 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
10354 /* Restore the types of the DIE tree starting at START_DIE from the hash
10355 table saved in CU. */
10358 reset_die_and_siblings_types (struct die_info
*start_die
, struct dwarf2_cu
*cu
)
10360 struct die_info
*die
;
10362 if (cu
->per_cu
->type_hash
== NULL
)
10365 for (die
= start_die
; die
!= NULL
; die
= die
->sibling
)
10367 die
->type
= get_die_type (die
, cu
->per_cu
->type_hash
);
10368 if (die
->child
!= NULL
)
10369 reset_die_and_siblings_types (die
->child
, cu
);
10373 /* Set the mark field in CU and in every other compilation unit in the
10374 cache that we must keep because we are keeping CU. */
10376 /* Add a dependence relationship from CU to REF_PER_CU. */
10379 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
10380 struct dwarf2_per_cu_data
*ref_per_cu
)
10384 if (cu
->dependencies
== NULL
)
10386 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
10387 NULL
, &cu
->comp_unit_obstack
,
10388 hashtab_obstack_allocate
,
10389 dummy_obstack_deallocate
);
10391 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
10393 *slot
= ref_per_cu
;
10396 /* Set the mark field in CU and in every other compilation unit in the
10397 cache that we must keep because we are keeping CU. */
10400 dwarf2_mark_helper (void **slot
, void *data
)
10402 struct dwarf2_per_cu_data
*per_cu
;
10404 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
10405 if (per_cu
->cu
->mark
)
10407 per_cu
->cu
->mark
= 1;
10409 if (per_cu
->cu
->dependencies
!= NULL
)
10410 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10416 dwarf2_mark (struct dwarf2_cu
*cu
)
10421 if (cu
->dependencies
!= NULL
)
10422 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10426 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
10430 per_cu
->cu
->mark
= 0;
10431 per_cu
= per_cu
->cu
->read_in_chain
;
10435 /* Trivial hash function for partial_die_info: the hash value of a DIE
10436 is its offset in .debug_info for this objfile. */
10439 partial_die_hash (const void *item
)
10441 const struct partial_die_info
*part_die
= item
;
10442 return part_die
->offset
;
10445 /* Trivial comparison function for partial_die_info structures: two DIEs
10446 are equal if they have the same offset. */
10449 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
10451 const struct partial_die_info
*part_die_lhs
= item_lhs
;
10452 const struct partial_die_info
*part_die_rhs
= item_rhs
;
10453 return part_die_lhs
->offset
== part_die_rhs
->offset
;
10456 static struct cmd_list_element
*set_dwarf2_cmdlist
;
10457 static struct cmd_list_element
*show_dwarf2_cmdlist
;
10460 set_dwarf2_cmd (char *args
, int from_tty
)
10462 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
10466 show_dwarf2_cmd (char *args
, int from_tty
)
10468 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
10471 void _initialize_dwarf2_read (void);
10474 _initialize_dwarf2_read (void)
10476 dwarf2_objfile_data_key
= register_objfile_data ();
10478 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
10479 Set DWARF 2 specific variables.\n\
10480 Configure DWARF 2 variables such as the cache size"),
10481 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
10482 0/*allow-unknown*/, &maintenance_set_cmdlist
);
10484 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
10485 Show DWARF 2 specific variables\n\
10486 Show DWARF 2 variables such as the cache size"),
10487 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
10488 0/*allow-unknown*/, &maintenance_show_cmdlist
);
10490 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
10491 &dwarf2_max_cache_age
, _("\
10492 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
10493 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
10494 A higher limit means that cached compilation units will be stored\n\
10495 in memory longer, and more total memory will be used. Zero disables\n\
10496 caching, which can slow down startup."),
10498 show_dwarf2_max_cache_age
,
10499 &set_dwarf2_cmdlist
,
10500 &show_dwarf2_cmdlist
);