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 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>
54 /* A note on memory usage for this file.
56 At the present time, this code reads the debug info sections into
57 the objfile's objfile_obstack. A definite improvement for startup
58 time, on platforms which do not emit relocations for debug
59 sections, would be to use mmap instead. The object's complete
60 debug information is loaded into memory, partly to simplify
61 absolute DIE references.
63 Whether using obstacks or mmap, the sections should remain loaded
64 until the objfile is released, and pointers into the section data
65 can be used for any other data associated to the objfile (symbol
66 names, type names, location expressions to name a few). */
69 /* .debug_info header for a compilation unit
70 Because of alignment constraints, this structure has padding and cannot
71 be mapped directly onto the beginning of the .debug_info section. */
72 typedef struct comp_unit_header
74 unsigned int length
; /* length of the .debug_info
76 unsigned short version
; /* version number -- 2 for DWARF
78 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
79 unsigned char addr_size
; /* byte size of an address -- 4 */
82 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
85 /* .debug_pubnames header
86 Because of alignment constraints, this structure has padding and cannot
87 be mapped directly onto the beginning of the .debug_info section. */
88 typedef struct pubnames_header
90 unsigned int length
; /* length of the .debug_pubnames
92 unsigned char version
; /* version number -- 2 for DWARF
94 unsigned int info_offset
; /* offset into .debug_info section */
95 unsigned int info_size
; /* byte size of .debug_info section
99 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
101 /* .debug_pubnames header
102 Because of alignment constraints, this structure has padding and cannot
103 be mapped directly onto the beginning of the .debug_info section. */
104 typedef struct aranges_header
106 unsigned int length
; /* byte len of the .debug_aranges
108 unsigned short version
; /* version number -- 2 for DWARF
110 unsigned int info_offset
; /* offset into .debug_info section */
111 unsigned char addr_size
; /* byte size of an address */
112 unsigned char seg_size
; /* byte size of segment descriptor */
115 #define _ACTUAL_ARANGES_HEADER_SIZE 12
117 /* .debug_line statement program prologue
118 Because of alignment constraints, this structure has padding and cannot
119 be mapped directly onto the beginning of the .debug_info section. */
120 typedef struct statement_prologue
122 unsigned int total_length
; /* byte length of the statement
124 unsigned short version
; /* version number -- 2 for DWARF
126 unsigned int prologue_length
; /* # bytes between prologue &
128 unsigned char minimum_instruction_length
; /* byte size of
130 unsigned char default_is_stmt
; /* initial value of is_stmt
133 unsigned char line_range
;
134 unsigned char opcode_base
; /* number assigned to first special
136 unsigned char *standard_opcode_lengths
;
140 static const struct objfile_data
*dwarf2_objfile_data_key
;
142 struct dwarf2_per_objfile
144 /* Sizes of debugging sections. */
145 unsigned int info_size
;
146 unsigned int abbrev_size
;
147 unsigned int line_size
;
148 unsigned int pubnames_size
;
149 unsigned int aranges_size
;
150 unsigned int loc_size
;
151 unsigned int macinfo_size
;
152 unsigned int str_size
;
153 unsigned int ranges_size
;
154 unsigned int frame_size
;
155 unsigned int eh_frame_size
;
157 /* Loaded data from the sections. */
158 gdb_byte
*info_buffer
;
159 gdb_byte
*abbrev_buffer
;
160 gdb_byte
*line_buffer
;
161 gdb_byte
*str_buffer
;
162 gdb_byte
*macinfo_buffer
;
163 gdb_byte
*ranges_buffer
;
164 gdb_byte
*loc_buffer
;
166 /* A list of all the compilation units. This is used to locate
167 the target compilation unit of a particular reference. */
168 struct dwarf2_per_cu_data
**all_comp_units
;
170 /* The number of compilation units in ALL_COMP_UNITS. */
173 /* A chain of compilation units that are currently read in, so that
174 they can be freed later. */
175 struct dwarf2_per_cu_data
*read_in_chain
;
177 /* A flag indicating wether this objfile has a section loaded at a
179 int has_section_at_zero
;
182 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
184 static asection
*dwarf_info_section
;
185 static asection
*dwarf_abbrev_section
;
186 static asection
*dwarf_line_section
;
187 static asection
*dwarf_pubnames_section
;
188 static asection
*dwarf_aranges_section
;
189 static asection
*dwarf_loc_section
;
190 static asection
*dwarf_macinfo_section
;
191 static asection
*dwarf_str_section
;
192 static asection
*dwarf_ranges_section
;
193 asection
*dwarf_frame_section
;
194 asection
*dwarf_eh_frame_section
;
196 /* names of the debugging sections */
198 #define INFO_SECTION ".debug_info"
199 #define ABBREV_SECTION ".debug_abbrev"
200 #define LINE_SECTION ".debug_line"
201 #define PUBNAMES_SECTION ".debug_pubnames"
202 #define ARANGES_SECTION ".debug_aranges"
203 #define LOC_SECTION ".debug_loc"
204 #define MACINFO_SECTION ".debug_macinfo"
205 #define STR_SECTION ".debug_str"
206 #define RANGES_SECTION ".debug_ranges"
207 #define FRAME_SECTION ".debug_frame"
208 #define EH_FRAME_SECTION ".eh_frame"
210 /* local data types */
212 /* We hold several abbreviation tables in memory at the same time. */
213 #ifndef ABBREV_HASH_SIZE
214 #define ABBREV_HASH_SIZE 121
217 /* The data in a compilation unit header, after target2host
218 translation, looks like this. */
219 struct comp_unit_head
221 unsigned long length
;
223 unsigned int abbrev_offset
;
224 unsigned char addr_size
;
225 unsigned char signed_addr_p
;
227 /* Size of file offsets; either 4 or 8. */
228 unsigned int offset_size
;
230 /* Size of the length field; either 4 or 12. */
231 unsigned int initial_length_size
;
233 /* Offset to the first byte of this compilation unit header in the
234 .debug_info section, for resolving relative reference dies. */
237 /* Pointer to this compilation unit header in the .debug_info
239 gdb_byte
*cu_head_ptr
;
241 /* Pointer to the first die of this compilation unit. This will be
242 the first byte following the compilation unit header. */
243 gdb_byte
*first_die_ptr
;
245 /* Pointer to the next compilation unit header in the program. */
246 struct comp_unit_head
*next
;
248 /* Base address of this compilation unit. */
249 CORE_ADDR base_address
;
251 /* Non-zero if base_address has been set. */
255 /* Fixed size for the DIE hash table. */
256 #ifndef REF_HASH_SIZE
257 #define REF_HASH_SIZE 1021
260 /* Internal state when decoding a particular compilation unit. */
263 /* The objfile containing this compilation unit. */
264 struct objfile
*objfile
;
266 /* The header of the compilation unit.
268 FIXME drow/2003-11-10: Some of the things from the comp_unit_head
269 should logically be moved to the dwarf2_cu structure. */
270 struct comp_unit_head header
;
272 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
274 /* The language we are debugging. */
275 enum language language
;
276 const struct language_defn
*language_defn
;
278 const char *producer
;
280 /* The generic symbol table building routines have separate lists for
281 file scope symbols and all all other scopes (local scopes). So
282 we need to select the right one to pass to add_symbol_to_list().
283 We do it by keeping a pointer to the correct list in list_in_scope.
285 FIXME: The original dwarf code just treated the file scope as the
286 first local scope, and all other local scopes as nested local
287 scopes, and worked fine. Check to see if we really need to
288 distinguish these in buildsym.c. */
289 struct pending
**list_in_scope
;
291 /* DWARF abbreviation table associated with this compilation unit. */
292 struct abbrev_info
**dwarf2_abbrevs
;
294 /* Storage for the abbrev table. */
295 struct obstack abbrev_obstack
;
297 /* Hash table holding all the loaded partial DIEs. */
300 /* Storage for things with the same lifetime as this read-in compilation
301 unit, including partial DIEs. */
302 struct obstack comp_unit_obstack
;
304 /* When multiple dwarf2_cu structures are living in memory, this field
305 chains them all together, so that they can be released efficiently.
306 We will probably also want a generation counter so that most-recently-used
307 compilation units are cached... */
308 struct dwarf2_per_cu_data
*read_in_chain
;
310 /* Backchain to our per_cu entry if the tree has been built. */
311 struct dwarf2_per_cu_data
*per_cu
;
313 /* How many compilation units ago was this CU last referenced? */
316 /* A hash table of die offsets for following references. */
317 struct die_info
*die_ref_table
[REF_HASH_SIZE
];
319 /* Full DIEs if read in. */
320 struct die_info
*dies
;
322 /* A set of pointers to dwarf2_per_cu_data objects for compilation
323 units referenced by this one. Only set during full symbol processing;
324 partial symbol tables do not have dependencies. */
327 /* Header data from the line table, during full symbol processing. */
328 struct line_header
*line_header
;
330 /* Mark used when releasing cached dies. */
331 unsigned int mark
: 1;
333 /* This flag will be set if this compilation unit might include
334 inter-compilation-unit references. */
335 unsigned int has_form_ref_addr
: 1;
337 /* This flag will be set if this compilation unit includes any
338 DW_TAG_namespace DIEs. If we know that there are explicit
339 DIEs for namespaces, we don't need to try to infer them
340 from mangled names. */
341 unsigned int has_namespace_info
: 1;
344 /* Persistent data held for a compilation unit, even when not
345 processing it. We put a pointer to this structure in the
346 read_symtab_private field of the psymtab. If we encounter
347 inter-compilation-unit references, we also maintain a sorted
348 list of all compilation units. */
350 struct dwarf2_per_cu_data
352 /* The start offset and length of this compilation unit. 2**30-1
353 bytes should suffice to store the length of any compilation unit
354 - if it doesn't, GDB will fall over anyway. */
355 unsigned long offset
;
356 unsigned long length
: 30;
358 /* Flag indicating this compilation unit will be read in before
359 any of the current compilation units are processed. */
360 unsigned long queued
: 1;
362 /* This flag will be set if we need to load absolutely all DIEs
363 for this compilation unit, instead of just the ones we think
364 are interesting. It gets set if we look for a DIE in the
365 hash table and don't find it. */
366 unsigned int load_all_dies
: 1;
368 /* Set iff currently read in. */
369 struct dwarf2_cu
*cu
;
371 /* If full symbols for this CU have been read in, then this field
372 holds a map of DIE offsets to types. It isn't always possible
373 to reconstruct this information later, so we have to preserve
377 /* The partial symbol table associated with this compilation unit,
378 or NULL for partial units (which do not have an associated
380 struct partial_symtab
*psymtab
;
383 /* The line number information for a compilation unit (found in the
384 .debug_line section) begins with a "statement program header",
385 which contains the following information. */
388 unsigned int total_length
;
389 unsigned short version
;
390 unsigned int header_length
;
391 unsigned char minimum_instruction_length
;
392 unsigned char default_is_stmt
;
394 unsigned char line_range
;
395 unsigned char opcode_base
;
397 /* standard_opcode_lengths[i] is the number of operands for the
398 standard opcode whose value is i. This means that
399 standard_opcode_lengths[0] is unused, and the last meaningful
400 element is standard_opcode_lengths[opcode_base - 1]. */
401 unsigned char *standard_opcode_lengths
;
403 /* The include_directories table. NOTE! These strings are not
404 allocated with xmalloc; instead, they are pointers into
405 debug_line_buffer. If you try to free them, `free' will get
407 unsigned int num_include_dirs
, include_dirs_size
;
410 /* The file_names table. NOTE! These strings are not allocated
411 with xmalloc; instead, they are pointers into debug_line_buffer.
412 Don't try to free them directly. */
413 unsigned int num_file_names
, file_names_size
;
417 unsigned int dir_index
;
418 unsigned int mod_time
;
420 int included_p
; /* Non-zero if referenced by the Line Number Program. */
421 struct symtab
*symtab
; /* The associated symbol table, if any. */
424 /* The start and end of the statement program following this
425 header. These point into dwarf2_per_objfile->line_buffer. */
426 gdb_byte
*statement_program_start
, *statement_program_end
;
429 /* When we construct a partial symbol table entry we only
430 need this much information. */
431 struct partial_die_info
433 /* Offset of this DIE. */
436 /* DWARF-2 tag for this DIE. */
437 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
439 /* Language code associated with this DIE. This is only used
440 for the compilation unit DIE. */
441 unsigned int language
: 8;
443 /* Assorted flags describing the data found in this DIE. */
444 unsigned int has_children
: 1;
445 unsigned int is_external
: 1;
446 unsigned int is_declaration
: 1;
447 unsigned int has_type
: 1;
448 unsigned int has_specification
: 1;
449 unsigned int has_stmt_list
: 1;
450 unsigned int has_pc_info
: 1;
452 /* Flag set if the SCOPE field of this structure has been
454 unsigned int scope_set
: 1;
456 /* Flag set if the DIE has a byte_size attribute. */
457 unsigned int has_byte_size
: 1;
459 /* The name of this DIE. Normally the value of DW_AT_name, but
460 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
465 /* The scope to prepend to our children. This is generally
466 allocated on the comp_unit_obstack, so will disappear
467 when this compilation unit leaves the cache. */
470 /* The location description associated with this DIE, if any. */
471 struct dwarf_block
*locdesc
;
473 /* If HAS_PC_INFO, the PC range associated with this DIE. */
477 /* Pointer into the info_buffer pointing at the target of
478 DW_AT_sibling, if any. */
481 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
482 DW_AT_specification (or DW_AT_abstract_origin or
484 unsigned int spec_offset
;
486 /* If HAS_STMT_LIST, the offset of the Line Number Information data. */
487 unsigned int line_offset
;
489 /* Pointers to this DIE's parent, first child, and next sibling,
491 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
494 /* This data structure holds the information of an abbrev. */
497 unsigned int number
; /* number identifying abbrev */
498 enum dwarf_tag tag
; /* dwarf tag */
499 unsigned short has_children
; /* boolean */
500 unsigned short num_attrs
; /* number of attributes */
501 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
502 struct abbrev_info
*next
; /* next in chain */
507 enum dwarf_attribute name
;
508 enum dwarf_form form
;
511 /* This data structure holds a complete die structure. */
514 enum dwarf_tag tag
; /* Tag indicating type of die */
515 unsigned int abbrev
; /* Abbrev number */
516 unsigned int offset
; /* Offset in .debug_info section */
517 unsigned int num_attrs
; /* Number of attributes */
518 struct attribute
*attrs
; /* An array of attributes */
519 struct die_info
*next_ref
; /* Next die in ref hash table */
521 /* The dies in a compilation unit form an n-ary tree. PARENT
522 points to this die's parent; CHILD points to the first child of
523 this node; and all the children of a given node are chained
524 together via their SIBLING fields, terminated by a die whose
526 struct die_info
*child
; /* Its first child, if any. */
527 struct die_info
*sibling
; /* Its next sibling, if any. */
528 struct die_info
*parent
; /* Its parent, if any. */
530 struct type
*type
; /* Cached type information */
533 /* Attributes have a name and a value */
536 enum dwarf_attribute name
;
537 enum dwarf_form form
;
541 struct dwarf_block
*blk
;
549 struct function_range
552 CORE_ADDR lowpc
, highpc
;
554 struct function_range
*next
;
557 /* Get at parts of an attribute structure */
559 #define DW_STRING(attr) ((attr)->u.str)
560 #define DW_UNSND(attr) ((attr)->u.unsnd)
561 #define DW_BLOCK(attr) ((attr)->u.blk)
562 #define DW_SND(attr) ((attr)->u.snd)
563 #define DW_ADDR(attr) ((attr)->u.addr)
565 /* Blocks are a bunch of untyped bytes. */
572 #ifndef ATTR_ALLOC_CHUNK
573 #define ATTR_ALLOC_CHUNK 4
576 /* Allocate fields for structs, unions and enums in this size. */
577 #ifndef DW_FIELD_ALLOC_CHUNK
578 #define DW_FIELD_ALLOC_CHUNK 4
581 /* A zeroed version of a partial die for initialization purposes. */
582 static struct partial_die_info zeroed_partial_die
;
584 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
585 but this would require a corresponding change in unpack_field_as_long
587 static int bits_per_byte
= 8;
589 /* The routines that read and process dies for a C struct or C++ class
590 pass lists of data member fields and lists of member function fields
591 in an instance of a field_info structure, as defined below. */
594 /* List of data member and baseclasses fields. */
597 struct nextfield
*next
;
604 /* Number of fields. */
607 /* Number of baseclasses. */
610 /* Set if the accesibility of one of the fields is not public. */
611 int non_public_fields
;
613 /* Member function fields array, entries are allocated in the order they
614 are encountered in the object file. */
617 struct nextfnfield
*next
;
618 struct fn_field fnfield
;
622 /* Member function fieldlist array, contains name of possibly overloaded
623 member function, number of overloaded member functions and a pointer
624 to the head of the member function field chain. */
629 struct nextfnfield
*head
;
633 /* Number of entries in the fnfieldlists array. */
637 /* One item on the queue of compilation units to read in full symbols
639 struct dwarf2_queue_item
641 struct dwarf2_per_cu_data
*per_cu
;
642 struct dwarf2_queue_item
*next
;
645 /* The current queue. */
646 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
648 /* Loaded secondary compilation units are kept in memory until they
649 have not been referenced for the processing of this many
650 compilation units. Set this to zero to disable caching. Cache
651 sizes of up to at least twenty will improve startup time for
652 typical inter-CU-reference binaries, at an obvious memory cost. */
653 static int dwarf2_max_cache_age
= 5;
655 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
656 struct cmd_list_element
*c
, const char *value
)
658 fprintf_filtered (file
, _("\
659 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
664 /* Various complaints about symbol reading that don't abort the process */
667 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
669 complaint (&symfile_complaints
,
670 _("statement list doesn't fit in .debug_line section"));
674 dwarf2_debug_line_missing_file_complaint (void)
676 complaint (&symfile_complaints
,
677 _(".debug_line section has line data without a file"));
681 dwarf2_complex_location_expr_complaint (void)
683 complaint (&symfile_complaints
, _("location expression too complex"));
687 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
690 complaint (&symfile_complaints
,
691 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
696 dwarf2_macros_too_long_complaint (void)
698 complaint (&symfile_complaints
,
699 _("macro info runs off end of `.debug_macinfo' section"));
703 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
705 complaint (&symfile_complaints
,
706 _("macro debug info contains a malformed macro definition:\n`%s'"),
711 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
713 complaint (&symfile_complaints
,
714 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
717 /* local function prototypes */
719 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
722 static void dwarf2_build_psymtabs_easy (struct objfile
*, int);
725 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
728 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
729 struct partial_die_info
*,
730 struct partial_symtab
*);
732 static void dwarf2_build_psymtabs_hard (struct objfile
*, int);
734 static void scan_partial_symbols (struct partial_die_info
*,
735 CORE_ADDR
*, CORE_ADDR
*,
738 static void add_partial_symbol (struct partial_die_info
*,
741 static int pdi_needs_namespace (enum dwarf_tag tag
);
743 static void add_partial_namespace (struct partial_die_info
*pdi
,
744 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
745 struct dwarf2_cu
*cu
);
747 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
748 struct dwarf2_cu
*cu
);
750 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
753 struct dwarf2_cu
*cu
);
755 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
757 static void psymtab_to_symtab_1 (struct partial_symtab
*);
759 gdb_byte
*dwarf2_read_section (struct objfile
*, asection
*);
761 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
763 static void dwarf2_free_abbrev_table (void *);
765 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
768 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
771 static struct partial_die_info
*load_partial_dies (bfd
*, gdb_byte
*, int,
774 static gdb_byte
*read_partial_die (struct partial_die_info
*,
775 struct abbrev_info
*abbrev
, unsigned int,
776 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
778 static struct partial_die_info
*find_partial_die (unsigned long,
781 static void fixup_partial_die (struct partial_die_info
*,
784 static gdb_byte
*read_full_die (struct die_info
**, bfd
*, gdb_byte
*,
785 struct dwarf2_cu
*, int *);
787 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
788 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
790 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
791 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
793 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
795 static int read_1_signed_byte (bfd
*, gdb_byte
*);
797 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
799 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
801 static unsigned long read_8_bytes (bfd
*, gdb_byte
*);
803 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
806 static LONGEST
read_initial_length (bfd
*, gdb_byte
*,
807 struct comp_unit_head
*, unsigned int *);
809 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
812 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
814 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
816 static char *read_indirect_string (bfd
*, gdb_byte
*,
817 const struct comp_unit_head
*,
820 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
822 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
824 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
826 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
828 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
831 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
832 struct dwarf2_cu
*cu
);
834 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
836 static struct die_info
*die_specification (struct die_info
*die
,
839 static void free_line_header (struct line_header
*lh
);
841 static void add_file_name (struct line_header
*, char *, unsigned int,
842 unsigned int, unsigned int);
844 static struct line_header
*(dwarf_decode_line_header
845 (unsigned int offset
,
846 bfd
*abfd
, struct dwarf2_cu
*cu
));
848 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
849 struct dwarf2_cu
*, struct partial_symtab
*);
851 static void dwarf2_start_subfile (char *, char *, char *);
853 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
856 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
859 static void dwarf2_const_value_data (struct attribute
*attr
,
863 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
865 static struct type
*die_containing_type (struct die_info
*,
868 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
870 static void read_type_die (struct die_info
*, struct dwarf2_cu
*);
872 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
874 static char *typename_concat (struct obstack
*,
879 static void read_typedef (struct die_info
*, struct dwarf2_cu
*);
881 static void read_base_type (struct die_info
*, struct dwarf2_cu
*);
883 static void read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
885 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
887 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
889 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
891 static int dwarf2_get_pc_bounds (struct die_info
*,
892 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*);
894 static void get_scope_pc_bounds (struct die_info
*,
895 CORE_ADDR
*, CORE_ADDR
*,
898 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
899 CORE_ADDR
, struct dwarf2_cu
*);
901 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
904 static void dwarf2_attach_fields_to_type (struct field_info
*,
905 struct type
*, struct dwarf2_cu
*);
907 static void dwarf2_add_member_fn (struct field_info
*,
908 struct die_info
*, struct type
*,
911 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
912 struct type
*, struct dwarf2_cu
*);
914 static void read_structure_type (struct die_info
*, struct dwarf2_cu
*);
916 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
918 static char *determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
920 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
922 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
924 static const char *namespace_name (struct die_info
*die
,
925 int *is_anonymous
, struct dwarf2_cu
*);
927 static void read_enumeration_type (struct die_info
*, struct dwarf2_cu
*);
929 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
931 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
933 static void read_array_type (struct die_info
*, struct dwarf2_cu
*);
935 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
938 static void read_tag_pointer_type (struct die_info
*, struct dwarf2_cu
*);
940 static void read_tag_ptr_to_member_type (struct die_info
*,
943 static void read_tag_reference_type (struct die_info
*, struct dwarf2_cu
*);
945 static void read_tag_const_type (struct die_info
*, struct dwarf2_cu
*);
947 static void read_tag_volatile_type (struct die_info
*, struct dwarf2_cu
*);
949 static void read_tag_string_type (struct die_info
*, struct dwarf2_cu
*);
951 static void read_subroutine_type (struct die_info
*, struct dwarf2_cu
*);
953 static struct die_info
*read_comp_unit (gdb_byte
*, bfd
*, struct dwarf2_cu
*);
955 static struct die_info
*read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
957 gdb_byte
**new_info_ptr
,
958 struct die_info
*parent
);
960 static struct die_info
*read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
962 gdb_byte
**new_info_ptr
,
963 struct die_info
*parent
);
965 static void free_die_list (struct die_info
*);
967 static void process_die (struct die_info
*, struct dwarf2_cu
*);
969 static char *dwarf2_linkage_name (struct die_info
*, struct dwarf2_cu
*);
971 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
973 static struct die_info
*dwarf2_extension (struct die_info
*die
,
976 static char *dwarf_tag_name (unsigned int);
978 static char *dwarf_attr_name (unsigned int);
980 static char *dwarf_form_name (unsigned int);
982 static char *dwarf_stack_op_name (unsigned int);
984 static char *dwarf_bool_name (unsigned int);
986 static char *dwarf_type_encoding_name (unsigned int);
989 static char *dwarf_cfi_name (unsigned int);
991 struct die_info
*copy_die (struct die_info
*);
994 static struct die_info
*sibling_die (struct die_info
*);
996 static void dump_die (struct die_info
*);
998 static void dump_die_list (struct die_info
*);
1000 static void store_in_ref_table (unsigned int, struct die_info
*,
1001 struct dwarf2_cu
*);
1003 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*,
1004 struct dwarf2_cu
*);
1006 static int dwarf2_get_attr_constant_value (struct attribute
*, int);
1008 static struct die_info
*follow_die_ref (struct die_info
*,
1010 struct dwarf2_cu
*);
1012 /* memory allocation interface */
1014 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1016 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1018 static struct die_info
*dwarf_alloc_die (void);
1020 static void initialize_cu_func_list (struct dwarf2_cu
*);
1022 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1023 struct dwarf2_cu
*);
1025 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1026 char *, bfd
*, struct dwarf2_cu
*);
1028 static int attr_form_is_block (struct attribute
*);
1030 static int attr_form_is_section_offset (struct attribute
*);
1032 static int attr_form_is_constant (struct attribute
*);
1034 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1036 struct dwarf2_cu
*cu
);
1038 static gdb_byte
*skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
1039 struct dwarf2_cu
*cu
);
1041 static void free_stack_comp_unit (void *);
1043 static hashval_t
partial_die_hash (const void *item
);
1045 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1047 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1048 (unsigned long offset
, struct objfile
*objfile
);
1050 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1051 (unsigned long offset
, struct objfile
*objfile
);
1053 static void free_one_comp_unit (void *);
1055 static void free_cached_comp_units (void *);
1057 static void age_cached_comp_units (void);
1059 static void free_one_cached_comp_unit (void *);
1061 static void set_die_type (struct die_info
*, struct type
*,
1062 struct dwarf2_cu
*);
1064 static void reset_die_and_siblings_types (struct die_info
*,
1065 struct dwarf2_cu
*);
1067 static void create_all_comp_units (struct objfile
*);
1069 static struct dwarf2_cu
*load_full_comp_unit (struct dwarf2_per_cu_data
*,
1072 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1074 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1075 struct dwarf2_per_cu_data
*);
1077 static void dwarf2_mark (struct dwarf2_cu
*);
1079 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1081 static void read_set_type (struct die_info
*, struct dwarf2_cu
*);
1084 /* Try to locate the sections we need for DWARF 2 debugging
1085 information and return true if we have enough to do something. */
1088 dwarf2_has_info (struct objfile
*objfile
)
1090 struct dwarf2_per_objfile
*data
;
1092 /* Initialize per-objfile state. */
1093 data
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1094 memset (data
, 0, sizeof (*data
));
1095 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1096 dwarf2_per_objfile
= data
;
1098 dwarf_info_section
= 0;
1099 dwarf_abbrev_section
= 0;
1100 dwarf_line_section
= 0;
1101 dwarf_str_section
= 0;
1102 dwarf_macinfo_section
= 0;
1103 dwarf_frame_section
= 0;
1104 dwarf_eh_frame_section
= 0;
1105 dwarf_ranges_section
= 0;
1106 dwarf_loc_section
= 0;
1108 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1109 return (dwarf_info_section
!= NULL
&& dwarf_abbrev_section
!= NULL
);
1112 /* This function is mapped across the sections and remembers the
1113 offset and size of each of the debugging sections we are interested
1117 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1119 if (strcmp (sectp
->name
, INFO_SECTION
) == 0)
1121 dwarf2_per_objfile
->info_size
= bfd_get_section_size (sectp
);
1122 dwarf_info_section
= sectp
;
1124 else if (strcmp (sectp
->name
, ABBREV_SECTION
) == 0)
1126 dwarf2_per_objfile
->abbrev_size
= bfd_get_section_size (sectp
);
1127 dwarf_abbrev_section
= sectp
;
1129 else if (strcmp (sectp
->name
, LINE_SECTION
) == 0)
1131 dwarf2_per_objfile
->line_size
= bfd_get_section_size (sectp
);
1132 dwarf_line_section
= sectp
;
1134 else if (strcmp (sectp
->name
, PUBNAMES_SECTION
) == 0)
1136 dwarf2_per_objfile
->pubnames_size
= bfd_get_section_size (sectp
);
1137 dwarf_pubnames_section
= sectp
;
1139 else if (strcmp (sectp
->name
, ARANGES_SECTION
) == 0)
1141 dwarf2_per_objfile
->aranges_size
= bfd_get_section_size (sectp
);
1142 dwarf_aranges_section
= sectp
;
1144 else if (strcmp (sectp
->name
, LOC_SECTION
) == 0)
1146 dwarf2_per_objfile
->loc_size
= bfd_get_section_size (sectp
);
1147 dwarf_loc_section
= sectp
;
1149 else if (strcmp (sectp
->name
, MACINFO_SECTION
) == 0)
1151 dwarf2_per_objfile
->macinfo_size
= bfd_get_section_size (sectp
);
1152 dwarf_macinfo_section
= sectp
;
1154 else if (strcmp (sectp
->name
, STR_SECTION
) == 0)
1156 dwarf2_per_objfile
->str_size
= bfd_get_section_size (sectp
);
1157 dwarf_str_section
= sectp
;
1159 else if (strcmp (sectp
->name
, FRAME_SECTION
) == 0)
1161 dwarf2_per_objfile
->frame_size
= bfd_get_section_size (sectp
);
1162 dwarf_frame_section
= sectp
;
1164 else if (strcmp (sectp
->name
, EH_FRAME_SECTION
) == 0)
1166 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1167 if (aflag
& SEC_HAS_CONTENTS
)
1169 dwarf2_per_objfile
->eh_frame_size
= bfd_get_section_size (sectp
);
1170 dwarf_eh_frame_section
= sectp
;
1173 else if (strcmp (sectp
->name
, RANGES_SECTION
) == 0)
1175 dwarf2_per_objfile
->ranges_size
= bfd_get_section_size (sectp
);
1176 dwarf_ranges_section
= sectp
;
1179 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1180 && bfd_section_vma (abfd
, sectp
) == 0)
1181 dwarf2_per_objfile
->has_section_at_zero
= 1;
1184 /* Build a partial symbol table. */
1187 dwarf2_build_psymtabs (struct objfile
*objfile
, int mainline
)
1189 /* We definitely need the .debug_info and .debug_abbrev sections */
1191 dwarf2_per_objfile
->info_buffer
= dwarf2_read_section (objfile
, dwarf_info_section
);
1192 dwarf2_per_objfile
->abbrev_buffer
= dwarf2_read_section (objfile
, dwarf_abbrev_section
);
1194 if (dwarf_line_section
)
1195 dwarf2_per_objfile
->line_buffer
= dwarf2_read_section (objfile
, dwarf_line_section
);
1197 dwarf2_per_objfile
->line_buffer
= NULL
;
1199 if (dwarf_str_section
)
1200 dwarf2_per_objfile
->str_buffer
= dwarf2_read_section (objfile
, dwarf_str_section
);
1202 dwarf2_per_objfile
->str_buffer
= NULL
;
1204 if (dwarf_macinfo_section
)
1205 dwarf2_per_objfile
->macinfo_buffer
= dwarf2_read_section (objfile
,
1206 dwarf_macinfo_section
);
1208 dwarf2_per_objfile
->macinfo_buffer
= NULL
;
1210 if (dwarf_ranges_section
)
1211 dwarf2_per_objfile
->ranges_buffer
= dwarf2_read_section (objfile
, dwarf_ranges_section
);
1213 dwarf2_per_objfile
->ranges_buffer
= NULL
;
1215 if (dwarf_loc_section
)
1216 dwarf2_per_objfile
->loc_buffer
= dwarf2_read_section (objfile
, dwarf_loc_section
);
1218 dwarf2_per_objfile
->loc_buffer
= NULL
;
1221 || (objfile
->global_psymbols
.size
== 0
1222 && objfile
->static_psymbols
.size
== 0))
1224 init_psymbol_list (objfile
, 1024);
1228 if (dwarf_aranges_offset
&& dwarf_pubnames_offset
)
1230 /* Things are significantly easier if we have .debug_aranges and
1231 .debug_pubnames sections */
1233 dwarf2_build_psymtabs_easy (objfile
, mainline
);
1237 /* only test this case for now */
1239 /* In this case we have to work a bit harder */
1240 dwarf2_build_psymtabs_hard (objfile
, mainline
);
1245 /* Build the partial symbol table from the information in the
1246 .debug_pubnames and .debug_aranges sections. */
1249 dwarf2_build_psymtabs_easy (struct objfile
*objfile
, int mainline
)
1251 bfd
*abfd
= objfile
->obfd
;
1252 char *aranges_buffer
, *pubnames_buffer
;
1253 char *aranges_ptr
, *pubnames_ptr
;
1254 unsigned int entry_length
, version
, info_offset
, info_size
;
1256 pubnames_buffer
= dwarf2_read_section (objfile
,
1257 dwarf_pubnames_section
);
1258 pubnames_ptr
= pubnames_buffer
;
1259 while ((pubnames_ptr
- pubnames_buffer
) < dwarf2_per_objfile
->pubnames_size
)
1261 struct comp_unit_head cu_header
;
1262 unsigned int bytes_read
;
1264 entry_length
= read_initial_length (abfd
, pubnames_ptr
, &cu_header
,
1266 pubnames_ptr
+= bytes_read
;
1267 version
= read_1_byte (abfd
, pubnames_ptr
);
1269 info_offset
= read_4_bytes (abfd
, pubnames_ptr
);
1271 info_size
= read_4_bytes (abfd
, pubnames_ptr
);
1275 aranges_buffer
= dwarf2_read_section (objfile
,
1276 dwarf_aranges_section
);
1281 /* Read in the comp unit header information from the debug_info at
1285 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1286 gdb_byte
*info_ptr
, bfd
*abfd
)
1289 unsigned int bytes_read
;
1290 cu_header
->length
= read_initial_length (abfd
, info_ptr
, cu_header
,
1292 info_ptr
+= bytes_read
;
1293 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1295 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1297 info_ptr
+= bytes_read
;
1298 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1300 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1301 if (signed_addr
< 0)
1302 internal_error (__FILE__
, __LINE__
,
1303 _("read_comp_unit_head: dwarf from non elf file"));
1304 cu_header
->signed_addr_p
= signed_addr
;
1309 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1312 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1314 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1316 if (header
->version
!= 2 && header
->version
!= 3)
1317 error (_("Dwarf Error: wrong version in compilation unit header "
1318 "(is %d, should be %d) [in module %s]"), header
->version
,
1319 2, bfd_get_filename (abfd
));
1321 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev_size
)
1322 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1323 "(offset 0x%lx + 6) [in module %s]"),
1324 (long) header
->abbrev_offset
,
1325 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
),
1326 bfd_get_filename (abfd
));
1328 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1329 > dwarf2_per_objfile
->info_buffer
+ dwarf2_per_objfile
->info_size
)
1330 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1331 "(offset 0x%lx + 0) [in module %s]"),
1332 (long) header
->length
,
1333 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
),
1334 bfd_get_filename (abfd
));
1339 /* Allocate a new partial symtab for file named NAME and mark this new
1340 partial symtab as being an include of PST. */
1343 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1344 struct objfile
*objfile
)
1346 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1348 subpst
->section_offsets
= pst
->section_offsets
;
1349 subpst
->textlow
= 0;
1350 subpst
->texthigh
= 0;
1352 subpst
->dependencies
= (struct partial_symtab
**)
1353 obstack_alloc (&objfile
->objfile_obstack
,
1354 sizeof (struct partial_symtab
*));
1355 subpst
->dependencies
[0] = pst
;
1356 subpst
->number_of_dependencies
= 1;
1358 subpst
->globals_offset
= 0;
1359 subpst
->n_global_syms
= 0;
1360 subpst
->statics_offset
= 0;
1361 subpst
->n_static_syms
= 0;
1362 subpst
->symtab
= NULL
;
1363 subpst
->read_symtab
= pst
->read_symtab
;
1366 /* No private part is necessary for include psymtabs. This property
1367 can be used to differentiate between such include psymtabs and
1368 the regular ones. */
1369 subpst
->read_symtab_private
= NULL
;
1372 /* Read the Line Number Program data and extract the list of files
1373 included by the source file represented by PST. Build an include
1374 partial symtab for each of these included files.
1376 This procedure assumes that there *is* a Line Number Program in
1377 the given CU. Callers should check that PDI->HAS_STMT_LIST is set
1378 before calling this procedure. */
1381 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1382 struct partial_die_info
*pdi
,
1383 struct partial_symtab
*pst
)
1385 struct objfile
*objfile
= cu
->objfile
;
1386 bfd
*abfd
= objfile
->obfd
;
1387 struct line_header
*lh
;
1389 lh
= dwarf_decode_line_header (pdi
->line_offset
, abfd
, cu
);
1391 return; /* No linetable, so no includes. */
1393 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1395 free_line_header (lh
);
1399 /* Build the partial symbol table by doing a quick pass through the
1400 .debug_info and .debug_abbrev sections. */
1403 dwarf2_build_psymtabs_hard (struct objfile
*objfile
, int mainline
)
1405 /* Instead of reading this into a big buffer, we should probably use
1406 mmap() on architectures that support it. (FIXME) */
1407 bfd
*abfd
= objfile
->obfd
;
1409 gdb_byte
*beg_of_comp_unit
;
1410 struct partial_die_info comp_unit_die
;
1411 struct partial_symtab
*pst
;
1412 struct cleanup
*back_to
;
1413 CORE_ADDR lowpc
, highpc
, baseaddr
;
1415 info_ptr
= dwarf2_per_objfile
->info_buffer
;
1417 /* Any cached compilation units will be linked by the per-objfile
1418 read_in_chain. Make sure to free them when we're done. */
1419 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1421 create_all_comp_units (objfile
);
1423 /* Since the objects we're extracting from .debug_info vary in
1424 length, only the individual functions to extract them (like
1425 read_comp_unit_head and load_partial_die) can really know whether
1426 the buffer is large enough to hold another complete object.
1428 At the moment, they don't actually check that. If .debug_info
1429 holds just one extra byte after the last compilation unit's dies,
1430 then read_comp_unit_head will happily read off the end of the
1431 buffer. read_partial_die is similarly casual. Those functions
1434 For this loop condition, simply checking whether there's any data
1435 left at all should be sufficient. */
1436 while (info_ptr
< (dwarf2_per_objfile
->info_buffer
1437 + dwarf2_per_objfile
->info_size
))
1439 struct cleanup
*back_to_inner
;
1440 struct dwarf2_cu cu
;
1441 struct abbrev_info
*abbrev
;
1442 unsigned int bytes_read
;
1443 struct dwarf2_per_cu_data
*this_cu
;
1445 beg_of_comp_unit
= info_ptr
;
1447 memset (&cu
, 0, sizeof (cu
));
1449 obstack_init (&cu
.comp_unit_obstack
);
1451 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1453 cu
.objfile
= objfile
;
1454 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
, abfd
);
1456 /* Complete the cu_header */
1457 cu
.header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
;
1458 cu
.header
.first_die_ptr
= info_ptr
;
1459 cu
.header
.cu_head_ptr
= beg_of_comp_unit
;
1461 cu
.list_in_scope
= &file_symbols
;
1463 /* Read the abbrevs for this compilation unit into a table */
1464 dwarf2_read_abbrevs (abfd
, &cu
);
1465 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1467 this_cu
= dwarf2_find_comp_unit (cu
.header
.offset
, objfile
);
1469 /* Read the compilation unit die */
1470 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, &cu
);
1471 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1472 abfd
, info_ptr
, &cu
);
1474 if (comp_unit_die
.tag
== DW_TAG_partial_unit
)
1476 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1477 + cu
.header
.initial_length_size
);
1478 do_cleanups (back_to_inner
);
1482 /* Set the language we're debugging */
1483 set_cu_language (comp_unit_die
.language
, &cu
);
1485 /* Allocate a new partial symbol table structure */
1486 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1487 comp_unit_die
.name
? comp_unit_die
.name
: "",
1488 comp_unit_die
.lowpc
,
1489 objfile
->global_psymbols
.next
,
1490 objfile
->static_psymbols
.next
);
1492 if (comp_unit_die
.dirname
)
1493 pst
->dirname
= xstrdup (comp_unit_die
.dirname
);
1495 pst
->read_symtab_private
= (char *) this_cu
;
1497 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1499 /* Store the function that reads in the rest of the symbol table */
1500 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1502 /* If this compilation unit was already read in, free the
1503 cached copy in order to read it in again. This is
1504 necessary because we skipped some symbols when we first
1505 read in the compilation unit (see load_partial_dies).
1506 This problem could be avoided, but the benefit is
1508 if (this_cu
->cu
!= NULL
)
1509 free_one_cached_comp_unit (this_cu
->cu
);
1511 cu
.per_cu
= this_cu
;
1513 /* Note that this is a pointer to our stack frame, being
1514 added to a global data structure. It will be cleaned up
1515 in free_stack_comp_unit when we finish with this
1516 compilation unit. */
1519 this_cu
->psymtab
= pst
;
1521 /* Check if comp unit has_children.
1522 If so, read the rest of the partial symbols from this comp unit.
1523 If not, there's no more debug_info for this comp unit. */
1524 if (comp_unit_die
.has_children
)
1526 struct partial_die_info
*first_die
;
1528 lowpc
= ((CORE_ADDR
) -1);
1529 highpc
= ((CORE_ADDR
) 0);
1531 first_die
= load_partial_dies (abfd
, info_ptr
, 1, &cu
);
1533 scan_partial_symbols (first_die
, &lowpc
, &highpc
, &cu
);
1535 /* If we didn't find a lowpc, set it to highpc to avoid
1536 complaints from `maint check'. */
1537 if (lowpc
== ((CORE_ADDR
) -1))
1540 /* If the compilation unit didn't have an explicit address range,
1541 then use the information extracted from its child dies. */
1542 if (! comp_unit_die
.has_pc_info
)
1544 comp_unit_die
.lowpc
= lowpc
;
1545 comp_unit_die
.highpc
= highpc
;
1548 pst
->textlow
= comp_unit_die
.lowpc
+ baseaddr
;
1549 pst
->texthigh
= comp_unit_die
.highpc
+ baseaddr
;
1551 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1552 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1553 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1554 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1555 sort_pst_symbols (pst
);
1557 /* If there is already a psymtab or symtab for a file of this
1558 name, remove it. (If there is a symtab, more drastic things
1559 also happen.) This happens in VxWorks. */
1560 free_named_symtabs (pst
->filename
);
1562 info_ptr
= beg_of_comp_unit
+ cu
.header
.length
1563 + cu
.header
.initial_length_size
;
1565 if (comp_unit_die
.has_stmt_list
)
1567 /* Get the list of files included in the current compilation unit,
1568 and build a psymtab for each of them. */
1569 dwarf2_build_include_psymtabs (&cu
, &comp_unit_die
, pst
);
1572 do_cleanups (back_to_inner
);
1574 do_cleanups (back_to
);
1577 /* Load the DIEs for a secondary CU into memory. */
1580 load_comp_unit (struct dwarf2_per_cu_data
*this_cu
, struct objfile
*objfile
)
1582 bfd
*abfd
= objfile
->obfd
;
1583 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
1584 struct partial_die_info comp_unit_die
;
1585 struct dwarf2_cu
*cu
;
1586 struct abbrev_info
*abbrev
;
1587 unsigned int bytes_read
;
1588 struct cleanup
*back_to
;
1590 info_ptr
= dwarf2_per_objfile
->info_buffer
+ this_cu
->offset
;
1591 beg_of_comp_unit
= info_ptr
;
1593 cu
= xmalloc (sizeof (struct dwarf2_cu
));
1594 memset (cu
, 0, sizeof (struct dwarf2_cu
));
1596 obstack_init (&cu
->comp_unit_obstack
);
1598 cu
->objfile
= objfile
;
1599 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
1601 /* Complete the cu_header. */
1602 cu
->header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
;
1603 cu
->header
.first_die_ptr
= info_ptr
;
1604 cu
->header
.cu_head_ptr
= beg_of_comp_unit
;
1606 /* Read the abbrevs for this compilation unit into a table. */
1607 dwarf2_read_abbrevs (abfd
, cu
);
1608 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
1610 /* Read the compilation unit die. */
1611 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
1612 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1613 abfd
, info_ptr
, cu
);
1615 /* Set the language we're debugging. */
1616 set_cu_language (comp_unit_die
.language
, cu
);
1618 /* Link this compilation unit into the compilation unit tree. */
1620 cu
->per_cu
= this_cu
;
1622 /* Check if comp unit has_children.
1623 If so, read the rest of the partial symbols from this comp unit.
1624 If not, there's no more debug_info for this comp unit. */
1625 if (comp_unit_die
.has_children
)
1626 load_partial_dies (abfd
, info_ptr
, 0, cu
);
1628 do_cleanups (back_to
);
1631 /* Create a list of all compilation units in OBJFILE. We do this only
1632 if an inter-comp-unit reference is found; presumably if there is one,
1633 there will be many, and one will occur early in the .debug_info section.
1634 So there's no point in building this list incrementally. */
1637 create_all_comp_units (struct objfile
*objfile
)
1641 struct dwarf2_per_cu_data
**all_comp_units
;
1642 gdb_byte
*info_ptr
= dwarf2_per_objfile
->info_buffer
;
1646 all_comp_units
= xmalloc (n_allocated
1647 * sizeof (struct dwarf2_per_cu_data
*));
1649 while (info_ptr
< dwarf2_per_objfile
->info_buffer
+ dwarf2_per_objfile
->info_size
)
1651 struct comp_unit_head cu_header
;
1652 gdb_byte
*beg_of_comp_unit
;
1653 struct dwarf2_per_cu_data
*this_cu
;
1654 unsigned long offset
;
1655 unsigned int bytes_read
;
1657 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
1659 /* Read just enough information to find out where the next
1660 compilation unit is. */
1661 cu_header
.initial_length_size
= 0;
1662 cu_header
.length
= read_initial_length (objfile
->obfd
, info_ptr
,
1663 &cu_header
, &bytes_read
);
1665 /* Save the compilation unit for later lookup. */
1666 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
1667 sizeof (struct dwarf2_per_cu_data
));
1668 memset (this_cu
, 0, sizeof (*this_cu
));
1669 this_cu
->offset
= offset
;
1670 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
1672 if (n_comp_units
== n_allocated
)
1675 all_comp_units
= xrealloc (all_comp_units
,
1677 * sizeof (struct dwarf2_per_cu_data
*));
1679 all_comp_units
[n_comp_units
++] = this_cu
;
1681 info_ptr
= info_ptr
+ this_cu
->length
;
1684 dwarf2_per_objfile
->all_comp_units
1685 = obstack_alloc (&objfile
->objfile_obstack
,
1686 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1687 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
1688 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1689 xfree (all_comp_units
);
1690 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
1693 /* Process all loaded DIEs for compilation unit CU, starting at FIRST_DIE.
1694 Also set *LOWPC and *HIGHPC to the lowest and highest PC values found
1698 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
1699 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
1701 struct objfile
*objfile
= cu
->objfile
;
1702 bfd
*abfd
= objfile
->obfd
;
1703 struct partial_die_info
*pdi
;
1705 /* Now, march along the PDI's, descending into ones which have
1706 interesting children but skipping the children of the other ones,
1707 until we reach the end of the compilation unit. */
1713 fixup_partial_die (pdi
, cu
);
1715 /* Anonymous namespaces have no name but have interesting
1716 children, so we need to look at them. Ditto for anonymous
1719 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
1720 || pdi
->tag
== DW_TAG_enumeration_type
)
1724 case DW_TAG_subprogram
:
1725 if (pdi
->has_pc_info
)
1727 if (pdi
->lowpc
< *lowpc
)
1729 *lowpc
= pdi
->lowpc
;
1731 if (pdi
->highpc
> *highpc
)
1733 *highpc
= pdi
->highpc
;
1735 if (!pdi
->is_declaration
)
1737 add_partial_symbol (pdi
, cu
);
1741 case DW_TAG_variable
:
1742 case DW_TAG_typedef
:
1743 case DW_TAG_union_type
:
1744 if (!pdi
->is_declaration
)
1746 add_partial_symbol (pdi
, cu
);
1749 case DW_TAG_class_type
:
1750 case DW_TAG_structure_type
:
1751 if (!pdi
->is_declaration
)
1753 add_partial_symbol (pdi
, cu
);
1756 case DW_TAG_enumeration_type
:
1757 if (!pdi
->is_declaration
)
1758 add_partial_enumeration (pdi
, cu
);
1760 case DW_TAG_base_type
:
1761 case DW_TAG_subrange_type
:
1762 /* File scope base type definitions are added to the partial
1764 add_partial_symbol (pdi
, cu
);
1766 case DW_TAG_namespace
:
1767 add_partial_namespace (pdi
, lowpc
, highpc
, cu
);
1774 /* If the die has a sibling, skip to the sibling. */
1776 pdi
= pdi
->die_sibling
;
1780 /* Functions used to compute the fully scoped name of a partial DIE.
1782 Normally, this is simple. For C++, the parent DIE's fully scoped
1783 name is concatenated with "::" and the partial DIE's name. For
1784 Java, the same thing occurs except that "." is used instead of "::".
1785 Enumerators are an exception; they use the scope of their parent
1786 enumeration type, i.e. the name of the enumeration type is not
1787 prepended to the enumerator.
1789 There are two complexities. One is DW_AT_specification; in this
1790 case "parent" means the parent of the target of the specification,
1791 instead of the direct parent of the DIE. The other is compilers
1792 which do not emit DW_TAG_namespace; in this case we try to guess
1793 the fully qualified name of structure types from their members'
1794 linkage names. This must be done using the DIE's children rather
1795 than the children of any DW_AT_specification target. We only need
1796 to do this for structures at the top level, i.e. if the target of
1797 any DW_AT_specification (if any; otherwise the DIE itself) does not
1800 /* Compute the scope prefix associated with PDI's parent, in
1801 compilation unit CU. The result will be allocated on CU's
1802 comp_unit_obstack, or a copy of the already allocated PDI->NAME
1803 field. NULL is returned if no prefix is necessary. */
1805 partial_die_parent_scope (struct partial_die_info
*pdi
,
1806 struct dwarf2_cu
*cu
)
1808 char *grandparent_scope
;
1809 struct partial_die_info
*parent
, *real_pdi
;
1811 /* We need to look at our parent DIE; if we have a DW_AT_specification,
1812 then this means the parent of the specification DIE. */
1815 while (real_pdi
->has_specification
)
1816 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
1818 parent
= real_pdi
->die_parent
;
1822 if (parent
->scope_set
)
1823 return parent
->scope
;
1825 fixup_partial_die (parent
, cu
);
1827 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
1829 if (parent
->tag
== DW_TAG_namespace
1830 || parent
->tag
== DW_TAG_structure_type
1831 || parent
->tag
== DW_TAG_class_type
1832 || parent
->tag
== DW_TAG_union_type
)
1834 if (grandparent_scope
== NULL
)
1835 parent
->scope
= parent
->name
;
1837 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
1840 else if (parent
->tag
== DW_TAG_enumeration_type
)
1841 /* Enumerators should not get the name of the enumeration as a prefix. */
1842 parent
->scope
= grandparent_scope
;
1845 /* FIXME drow/2004-04-01: What should we be doing with
1846 function-local names? For partial symbols, we should probably be
1848 complaint (&symfile_complaints
,
1849 _("unhandled containing DIE tag %d for DIE at %d"),
1850 parent
->tag
, pdi
->offset
);
1851 parent
->scope
= grandparent_scope
;
1854 parent
->scope_set
= 1;
1855 return parent
->scope
;
1858 /* Return the fully scoped name associated with PDI, from compilation unit
1859 CU. The result will be allocated with malloc. */
1861 partial_die_full_name (struct partial_die_info
*pdi
,
1862 struct dwarf2_cu
*cu
)
1866 parent_scope
= partial_die_parent_scope (pdi
, cu
);
1867 if (parent_scope
== NULL
)
1870 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
1874 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
1876 struct objfile
*objfile
= cu
->objfile
;
1878 char *actual_name
= NULL
;
1879 const char *my_prefix
;
1880 const struct partial_symbol
*psym
= NULL
;
1882 int built_actual_name
= 0;
1884 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1886 if (pdi_needs_namespace (pdi
->tag
))
1888 actual_name
= partial_die_full_name (pdi
, cu
);
1890 built_actual_name
= 1;
1893 if (actual_name
== NULL
)
1894 actual_name
= pdi
->name
;
1898 case DW_TAG_subprogram
:
1899 if (pdi
->is_external
)
1901 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1902 mst_text, objfile); */
1903 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1904 VAR_DOMAIN
, LOC_BLOCK
,
1905 &objfile
->global_psymbols
,
1906 0, pdi
->lowpc
+ baseaddr
,
1907 cu
->language
, objfile
);
1911 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1912 mst_file_text, objfile); */
1913 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1914 VAR_DOMAIN
, LOC_BLOCK
,
1915 &objfile
->static_psymbols
,
1916 0, pdi
->lowpc
+ baseaddr
,
1917 cu
->language
, objfile
);
1920 case DW_TAG_variable
:
1921 if (pdi
->is_external
)
1924 Don't enter into the minimal symbol tables as there is
1925 a minimal symbol table entry from the ELF symbols already.
1926 Enter into partial symbol table if it has a location
1927 descriptor or a type.
1928 If the location descriptor is missing, new_symbol will create
1929 a LOC_UNRESOLVED symbol, the address of the variable will then
1930 be determined from the minimal symbol table whenever the variable
1932 The address for the partial symbol table entry is not
1933 used by GDB, but it comes in handy for debugging partial symbol
1937 addr
= decode_locdesc (pdi
->locdesc
, cu
);
1938 if (pdi
->locdesc
|| pdi
->has_type
)
1939 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1940 VAR_DOMAIN
, LOC_STATIC
,
1941 &objfile
->global_psymbols
,
1943 cu
->language
, objfile
);
1947 /* Static Variable. Skip symbols without location descriptors. */
1948 if (pdi
->locdesc
== NULL
)
1950 if (built_actual_name
)
1951 xfree (actual_name
);
1954 addr
= decode_locdesc (pdi
->locdesc
, cu
);
1955 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
1956 mst_file_data, objfile); */
1957 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1958 VAR_DOMAIN
, LOC_STATIC
,
1959 &objfile
->static_psymbols
,
1961 cu
->language
, objfile
);
1964 case DW_TAG_typedef
:
1965 case DW_TAG_base_type
:
1966 case DW_TAG_subrange_type
:
1967 add_psymbol_to_list (actual_name
, strlen (actual_name
),
1968 VAR_DOMAIN
, LOC_TYPEDEF
,
1969 &objfile
->static_psymbols
,
1970 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
1972 case DW_TAG_namespace
:
1973 add_psymbol_to_list (actual_name
, strlen (actual_name
),
1974 VAR_DOMAIN
, LOC_TYPEDEF
,
1975 &objfile
->global_psymbols
,
1976 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
1978 case DW_TAG_class_type
:
1979 case DW_TAG_structure_type
:
1980 case DW_TAG_union_type
:
1981 case DW_TAG_enumeration_type
:
1982 /* Skip external references. The DWARF standard says in the section
1983 about "Structure, Union, and Class Type Entries": "An incomplete
1984 structure, union or class type is represented by a structure,
1985 union or class entry that does not have a byte size attribute
1986 and that has a DW_AT_declaration attribute." */
1987 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
1989 if (built_actual_name
)
1990 xfree (actual_name
);
1994 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
1995 static vs. global. */
1996 add_psymbol_to_list (actual_name
, strlen (actual_name
),
1997 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1998 (cu
->language
== language_cplus
1999 || cu
->language
== language_java
)
2000 ? &objfile
->global_psymbols
2001 : &objfile
->static_psymbols
,
2002 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2004 if (cu
->language
== language_cplus
2005 || cu
->language
== language_java
2006 || cu
->language
== language_ada
)
2008 /* For C++ and Java, these implicitly act as typedefs as well. */
2009 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2010 VAR_DOMAIN
, LOC_TYPEDEF
,
2011 &objfile
->global_psymbols
,
2012 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2015 case DW_TAG_enumerator
:
2016 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2017 VAR_DOMAIN
, LOC_CONST
,
2018 (cu
->language
== language_cplus
2019 || cu
->language
== language_java
)
2020 ? &objfile
->global_psymbols
2021 : &objfile
->static_psymbols
,
2022 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2028 /* Check to see if we should scan the name for possible namespace
2029 info. Only do this if this is C++, if we don't have namespace
2030 debugging info in the file, if the psym is of an appropriate type
2031 (otherwise we'll have psym == NULL), and if we actually had a
2032 mangled name to begin with. */
2034 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2035 cases which do not set PSYM above? */
2037 if (cu
->language
== language_cplus
2038 && cu
->has_namespace_info
== 0
2040 && SYMBOL_CPLUS_DEMANGLED_NAME (psym
) != NULL
)
2041 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym
),
2044 if (built_actual_name
)
2045 xfree (actual_name
);
2048 /* Determine whether a die of type TAG living in a C++ class or
2049 namespace needs to have the name of the scope prepended to the
2050 name listed in the die. */
2053 pdi_needs_namespace (enum dwarf_tag tag
)
2057 case DW_TAG_namespace
:
2058 case DW_TAG_typedef
:
2059 case DW_TAG_class_type
:
2060 case DW_TAG_structure_type
:
2061 case DW_TAG_union_type
:
2062 case DW_TAG_enumeration_type
:
2063 case DW_TAG_enumerator
:
2070 /* Read a partial die corresponding to a namespace; also, add a symbol
2071 corresponding to that namespace to the symbol table. NAMESPACE is
2072 the name of the enclosing namespace. */
2075 add_partial_namespace (struct partial_die_info
*pdi
,
2076 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2077 struct dwarf2_cu
*cu
)
2079 struct objfile
*objfile
= cu
->objfile
;
2081 /* Add a symbol for the namespace. */
2083 add_partial_symbol (pdi
, cu
);
2085 /* Now scan partial symbols in that namespace. */
2087 if (pdi
->has_children
)
2088 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, cu
);
2091 /* See if we can figure out if the class lives in a namespace. We do
2092 this by looking for a member function; its demangled name will
2093 contain namespace info, if there is any. */
2096 guess_structure_name (struct partial_die_info
*struct_pdi
,
2097 struct dwarf2_cu
*cu
)
2099 if ((cu
->language
== language_cplus
2100 || cu
->language
== language_java
)
2101 && cu
->has_namespace_info
== 0
2102 && struct_pdi
->has_children
)
2104 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2105 what template types look like, because the demangler
2106 frequently doesn't give the same name as the debug info. We
2107 could fix this by only using the demangled name to get the
2108 prefix (but see comment in read_structure_type). */
2110 struct partial_die_info
*child_pdi
= struct_pdi
->die_child
;
2111 struct partial_die_info
*real_pdi
;
2113 /* If this DIE (this DIE's specification, if any) has a parent, then
2114 we should not do this. We'll prepend the parent's fully qualified
2115 name when we create the partial symbol. */
2117 real_pdi
= struct_pdi
;
2118 while (real_pdi
->has_specification
)
2119 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2121 if (real_pdi
->die_parent
!= NULL
)
2124 while (child_pdi
!= NULL
)
2126 if (child_pdi
->tag
== DW_TAG_subprogram
)
2128 char *actual_class_name
2129 = language_class_name_from_physname (cu
->language_defn
,
2131 if (actual_class_name
!= NULL
)
2134 = obsavestring (actual_class_name
,
2135 strlen (actual_class_name
),
2136 &cu
->comp_unit_obstack
);
2137 xfree (actual_class_name
);
2142 child_pdi
= child_pdi
->die_sibling
;
2147 /* Read a partial die corresponding to an enumeration type. */
2150 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2151 struct dwarf2_cu
*cu
)
2153 struct objfile
*objfile
= cu
->objfile
;
2154 bfd
*abfd
= objfile
->obfd
;
2155 struct partial_die_info
*pdi
;
2157 if (enum_pdi
->name
!= NULL
)
2158 add_partial_symbol (enum_pdi
, cu
);
2160 pdi
= enum_pdi
->die_child
;
2163 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2164 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2166 add_partial_symbol (pdi
, cu
);
2167 pdi
= pdi
->die_sibling
;
2171 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2172 Return the corresponding abbrev, or NULL if the number is zero (indicating
2173 an empty DIE). In either case *BYTES_READ will be set to the length of
2174 the initial number. */
2176 static struct abbrev_info
*
2177 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2178 struct dwarf2_cu
*cu
)
2180 bfd
*abfd
= cu
->objfile
->obfd
;
2181 unsigned int abbrev_number
;
2182 struct abbrev_info
*abbrev
;
2184 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2186 if (abbrev_number
== 0)
2189 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2192 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2193 bfd_get_filename (abfd
));
2199 /* Scan the debug information for CU starting at INFO_PTR. Returns a
2200 pointer to the end of a series of DIEs, terminated by an empty
2201 DIE. Any children of the skipped DIEs will also be skipped. */
2204 skip_children (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2206 struct abbrev_info
*abbrev
;
2207 unsigned int bytes_read
;
2211 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2213 return info_ptr
+ bytes_read
;
2215 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
2219 /* Scan the debug information for CU starting at INFO_PTR. INFO_PTR
2220 should point just after the initial uleb128 of a DIE, and the
2221 abbrev corresponding to that skipped uleb128 should be passed in
2222 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2226 skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
2227 struct dwarf2_cu
*cu
)
2229 unsigned int bytes_read
;
2230 struct attribute attr
;
2231 bfd
*abfd
= cu
->objfile
->obfd
;
2232 unsigned int form
, i
;
2234 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2236 /* The only abbrev we care about is DW_AT_sibling. */
2237 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2239 read_attribute (&attr
, &abbrev
->attrs
[i
],
2240 abfd
, info_ptr
, cu
);
2241 if (attr
.form
== DW_FORM_ref_addr
)
2242 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2244 return dwarf2_per_objfile
->info_buffer
2245 + dwarf2_get_ref_die_offset (&attr
, cu
);
2248 /* If it isn't DW_AT_sibling, skip this attribute. */
2249 form
= abbrev
->attrs
[i
].form
;
2254 case DW_FORM_ref_addr
:
2255 info_ptr
+= cu
->header
.addr_size
;
2274 case DW_FORM_string
:
2275 read_string (abfd
, info_ptr
, &bytes_read
);
2276 info_ptr
+= bytes_read
;
2279 info_ptr
+= cu
->header
.offset_size
;
2282 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2283 info_ptr
+= bytes_read
;
2285 case DW_FORM_block1
:
2286 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2288 case DW_FORM_block2
:
2289 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2291 case DW_FORM_block4
:
2292 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2296 case DW_FORM_ref_udata
:
2297 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2299 case DW_FORM_indirect
:
2300 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2301 info_ptr
+= bytes_read
;
2302 /* We need to continue parsing from here, so just go back to
2304 goto skip_attribute
;
2307 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2308 dwarf_form_name (form
),
2309 bfd_get_filename (abfd
));
2313 if (abbrev
->has_children
)
2314 return skip_children (info_ptr
, cu
);
2319 /* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of
2320 the next DIE after ORIG_PDI. */
2323 locate_pdi_sibling (struct partial_die_info
*orig_pdi
, gdb_byte
*info_ptr
,
2324 bfd
*abfd
, struct dwarf2_cu
*cu
)
2326 /* Do we know the sibling already? */
2328 if (orig_pdi
->sibling
)
2329 return orig_pdi
->sibling
;
2331 /* Are there any children to deal with? */
2333 if (!orig_pdi
->has_children
)
2336 /* Skip the children the long way. */
2338 return skip_children (info_ptr
, cu
);
2341 /* Expand this partial symbol table into a full symbol table. */
2344 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2346 /* FIXME: This is barely more than a stub. */
2351 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2357 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2358 gdb_flush (gdb_stdout
);
2361 /* Restore our global data. */
2362 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2363 dwarf2_objfile_data_key
);
2365 psymtab_to_symtab_1 (pst
);
2367 /* Finish up the debug error message. */
2369 printf_filtered (_("done.\n"));
2374 /* Add PER_CU to the queue. */
2377 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2379 struct dwarf2_queue_item
*item
;
2382 item
= xmalloc (sizeof (*item
));
2383 item
->per_cu
= per_cu
;
2386 if (dwarf2_queue
== NULL
)
2387 dwarf2_queue
= item
;
2389 dwarf2_queue_tail
->next
= item
;
2391 dwarf2_queue_tail
= item
;
2394 /* Process the queue. */
2397 process_queue (struct objfile
*objfile
)
2399 struct dwarf2_queue_item
*item
, *next_item
;
2401 /* Initially, there is just one item on the queue. Load its DIEs,
2402 and the DIEs of any other compilation units it requires,
2405 for (item
= dwarf2_queue
; item
!= NULL
; item
= item
->next
)
2407 /* Read in this compilation unit. This may add new items to
2408 the end of the queue. */
2409 load_full_comp_unit (item
->per_cu
, objfile
);
2411 item
->per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
2412 dwarf2_per_objfile
->read_in_chain
= item
->per_cu
;
2414 /* If this compilation unit has already had full symbols created,
2415 reset the TYPE fields in each DIE. */
2416 if (item
->per_cu
->type_hash
)
2417 reset_die_and_siblings_types (item
->per_cu
->cu
->dies
,
2421 /* Now everything left on the queue needs to be read in. Process
2422 them, one at a time, removing from the queue as we finish. */
2423 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
2425 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
2426 process_full_comp_unit (item
->per_cu
);
2428 item
->per_cu
->queued
= 0;
2429 next_item
= item
->next
;
2433 dwarf2_queue_tail
= NULL
;
2436 /* Free all allocated queue entries. This function only releases anything if
2437 an error was thrown; if the queue was processed then it would have been
2438 freed as we went along. */
2441 dwarf2_release_queue (void *dummy
)
2443 struct dwarf2_queue_item
*item
, *last
;
2445 item
= dwarf2_queue
;
2448 /* Anything still marked queued is likely to be in an
2449 inconsistent state, so discard it. */
2450 if (item
->per_cu
->queued
)
2452 if (item
->per_cu
->cu
!= NULL
)
2453 free_one_cached_comp_unit (item
->per_cu
->cu
);
2454 item
->per_cu
->queued
= 0;
2462 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
2465 /* Read in full symbols for PST, and anything it depends on. */
2468 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2470 struct dwarf2_per_cu_data
*per_cu
;
2471 struct cleanup
*back_to
;
2474 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2475 if (!pst
->dependencies
[i
]->readin
)
2477 /* Inform about additional files that need to be read in. */
2480 /* FIXME: i18n: Need to make this a single string. */
2481 fputs_filtered (" ", gdb_stdout
);
2483 fputs_filtered ("and ", gdb_stdout
);
2485 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2486 wrap_here (""); /* Flush output */
2487 gdb_flush (gdb_stdout
);
2489 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2492 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
2496 /* It's an include file, no symbols to read for it.
2497 Everything is in the parent symtab. */
2502 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2504 queue_comp_unit (per_cu
);
2506 process_queue (pst
->objfile
);
2508 /* Age the cache, releasing compilation units that have not
2509 been used recently. */
2510 age_cached_comp_units ();
2512 do_cleanups (back_to
);
2515 /* Load the DIEs associated with PST and PER_CU into memory. */
2517 static struct dwarf2_cu
*
2518 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2520 bfd
*abfd
= objfile
->obfd
;
2521 struct dwarf2_cu
*cu
;
2522 unsigned long offset
;
2524 struct cleanup
*back_to
, *free_cu_cleanup
;
2525 struct attribute
*attr
;
2528 /* Set local variables from the partial symbol table info. */
2529 offset
= per_cu
->offset
;
2531 info_ptr
= dwarf2_per_objfile
->info_buffer
+ offset
;
2533 cu
= xmalloc (sizeof (struct dwarf2_cu
));
2534 memset (cu
, 0, sizeof (struct dwarf2_cu
));
2536 /* If an error occurs while loading, release our storage. */
2537 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
2539 cu
->objfile
= objfile
;
2541 /* read in the comp_unit header */
2542 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
2544 /* Read the abbrevs for this compilation unit */
2545 dwarf2_read_abbrevs (abfd
, cu
);
2546 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2548 cu
->header
.offset
= offset
;
2550 cu
->per_cu
= per_cu
;
2553 /* We use this obstack for block values in dwarf_alloc_block. */
2554 obstack_init (&cu
->comp_unit_obstack
);
2556 cu
->dies
= read_comp_unit (info_ptr
, abfd
, cu
);
2558 /* We try not to read any attributes in this function, because not
2559 all objfiles needed for references have been loaded yet, and symbol
2560 table processing isn't initialized. But we have to set the CU language,
2561 or we won't be able to build types correctly. */
2562 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
2564 set_cu_language (DW_UNSND (attr
), cu
);
2566 set_cu_language (language_minimal
, cu
);
2568 do_cleanups (back_to
);
2570 /* We've successfully allocated this compilation unit. Let our caller
2571 clean it up when finished with it. */
2572 discard_cleanups (free_cu_cleanup
);
2577 /* Generate full symbol information for PST and CU, whose DIEs have
2578 already been loaded into memory. */
2581 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2583 struct partial_symtab
*pst
= per_cu
->psymtab
;
2584 struct dwarf2_cu
*cu
= per_cu
->cu
;
2585 struct objfile
*objfile
= pst
->objfile
;
2586 bfd
*abfd
= objfile
->obfd
;
2587 CORE_ADDR lowpc
, highpc
;
2588 struct symtab
*symtab
;
2589 struct cleanup
*back_to
;
2590 struct attribute
*attr
;
2593 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2595 /* We're in the global namespace. */
2596 processing_current_prefix
= "";
2599 back_to
= make_cleanup (really_free_pendings
, NULL
);
2601 cu
->list_in_scope
= &file_symbols
;
2603 /* Find the base address of the compilation unit for range lists and
2604 location lists. It will normally be specified by DW_AT_low_pc.
2605 In DWARF-3 draft 4, the base address could be overridden by
2606 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2607 compilation units with discontinuous ranges. */
2609 cu
->header
.base_known
= 0;
2610 cu
->header
.base_address
= 0;
2612 attr
= dwarf2_attr (cu
->dies
, DW_AT_entry_pc
, cu
);
2615 cu
->header
.base_address
= DW_ADDR (attr
);
2616 cu
->header
.base_known
= 1;
2620 attr
= dwarf2_attr (cu
->dies
, DW_AT_low_pc
, cu
);
2623 cu
->header
.base_address
= DW_ADDR (attr
);
2624 cu
->header
.base_known
= 1;
2628 /* Do line number decoding in read_file_scope () */
2629 process_die (cu
->dies
, cu
);
2631 /* Some compilers don't define a DW_AT_high_pc attribute for the
2632 compilation unit. If the DW_AT_high_pc is missing, synthesize
2633 it, by scanning the DIE's below the compilation unit. */
2634 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
2636 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
2638 /* Set symtab language to language from DW_AT_language.
2639 If the compilation is from a C file generated by language preprocessors,
2640 do not set the language if it was already deduced by start_subfile. */
2642 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
2644 symtab
->language
= cu
->language
;
2646 pst
->symtab
= symtab
;
2649 do_cleanups (back_to
);
2652 /* Process a die and its children. */
2655 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
2659 case DW_TAG_padding
:
2661 case DW_TAG_compile_unit
:
2662 read_file_scope (die
, cu
);
2664 case DW_TAG_subprogram
:
2665 read_subroutine_type (die
, cu
);
2666 read_func_scope (die
, cu
);
2668 case DW_TAG_inlined_subroutine
:
2669 /* FIXME: These are ignored for now.
2670 They could be used to set breakpoints on all inlined instances
2671 of a function and make GDB `next' properly over inlined functions. */
2673 case DW_TAG_lexical_block
:
2674 case DW_TAG_try_block
:
2675 case DW_TAG_catch_block
:
2676 read_lexical_block_scope (die
, cu
);
2678 case DW_TAG_class_type
:
2679 case DW_TAG_structure_type
:
2680 case DW_TAG_union_type
:
2681 read_structure_type (die
, cu
);
2682 process_structure_scope (die
, cu
);
2684 case DW_TAG_enumeration_type
:
2685 read_enumeration_type (die
, cu
);
2686 process_enumeration_scope (die
, cu
);
2689 /* FIXME drow/2004-03-14: These initialize die->type, but do not create
2690 a symbol or process any children. Therefore it doesn't do anything
2691 that won't be done on-demand by read_type_die. */
2692 case DW_TAG_subroutine_type
:
2693 read_subroutine_type (die
, cu
);
2695 case DW_TAG_set_type
:
2696 read_set_type (die
, cu
);
2698 case DW_TAG_array_type
:
2699 read_array_type (die
, cu
);
2701 case DW_TAG_pointer_type
:
2702 read_tag_pointer_type (die
, cu
);
2704 case DW_TAG_ptr_to_member_type
:
2705 read_tag_ptr_to_member_type (die
, cu
);
2707 case DW_TAG_reference_type
:
2708 read_tag_reference_type (die
, cu
);
2710 case DW_TAG_string_type
:
2711 read_tag_string_type (die
, cu
);
2715 case DW_TAG_base_type
:
2716 read_base_type (die
, cu
);
2717 /* Add a typedef symbol for the type definition, if it has a
2719 new_symbol (die
, die
->type
, cu
);
2721 case DW_TAG_subrange_type
:
2722 read_subrange_type (die
, cu
);
2723 /* Add a typedef symbol for the type definition, if it has a
2725 new_symbol (die
, die
->type
, cu
);
2727 case DW_TAG_common_block
:
2728 read_common_block (die
, cu
);
2730 case DW_TAG_common_inclusion
:
2732 case DW_TAG_namespace
:
2733 processing_has_namespace_info
= 1;
2734 read_namespace (die
, cu
);
2736 case DW_TAG_imported_declaration
:
2737 case DW_TAG_imported_module
:
2738 /* FIXME: carlton/2002-10-16: Eventually, we should use the
2739 information contained in these. DW_TAG_imported_declaration
2740 dies shouldn't have children; DW_TAG_imported_module dies
2741 shouldn't in the C++ case, but conceivably could in the
2742 Fortran case, so we'll have to replace this gdb_assert if
2743 Fortran compilers start generating that info. */
2744 processing_has_namespace_info
= 1;
2745 gdb_assert (die
->child
== NULL
);
2748 new_symbol (die
, NULL
, cu
);
2754 initialize_cu_func_list (struct dwarf2_cu
*cu
)
2756 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
2760 free_cu_line_header (void *arg
)
2762 struct dwarf2_cu
*cu
= arg
;
2764 free_line_header (cu
->line_header
);
2765 cu
->line_header
= NULL
;
2769 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
2771 struct objfile
*objfile
= cu
->objfile
;
2772 struct comp_unit_head
*cu_header
= &cu
->header
;
2773 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2774 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
2775 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
2776 struct attribute
*attr
;
2778 char *comp_dir
= NULL
;
2779 struct die_info
*child_die
;
2780 bfd
*abfd
= objfile
->obfd
;
2781 struct line_header
*line_header
= 0;
2784 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2786 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
2788 /* If we didn't find a lowpc, set it to highpc to avoid complaints
2789 from finish_block. */
2790 if (lowpc
== ((CORE_ADDR
) -1))
2795 /* Find the filename. Do not use dwarf2_name here, since the filename
2796 is not a source language identifier. */
2797 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
2800 name
= DW_STRING (attr
);
2803 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
2805 comp_dir
= DW_STRING (attr
);
2806 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
2808 comp_dir
= ldirname (name
);
2809 if (comp_dir
!= NULL
)
2810 make_cleanup (xfree
, comp_dir
);
2812 if (comp_dir
!= NULL
)
2814 /* Irix 6.2 native cc prepends <machine>.: to the compilation
2815 directory, get rid of it. */
2816 char *cp
= strchr (comp_dir
, ':');
2818 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
2825 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
2828 set_cu_language (DW_UNSND (attr
), cu
);
2831 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
2833 cu
->producer
= DW_STRING (attr
);
2835 /* We assume that we're processing GCC output. */
2836 processing_gcc_compilation
= 2;
2838 start_symtab (name
, comp_dir
, lowpc
);
2839 record_debugformat ("DWARF 2");
2840 record_producer (cu
->producer
);
2842 initialize_cu_func_list (cu
);
2844 /* Decode line number information if present. We do this before
2845 processing child DIEs, so that the line header table is available
2846 for DW_AT_decl_file. */
2847 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2850 unsigned int line_offset
= DW_UNSND (attr
);
2851 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2854 cu
->line_header
= line_header
;
2855 make_cleanup (free_cu_line_header
, cu
);
2856 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
2860 /* Process all dies in compilation unit. */
2861 if (die
->child
!= NULL
)
2863 child_die
= die
->child
;
2864 while (child_die
&& child_die
->tag
)
2866 process_die (child_die
, cu
);
2867 child_die
= sibling_die (child_die
);
2871 /* Decode macro information, if present. Dwarf 2 macro information
2872 refers to information in the line number info statement program
2873 header, so we can only read it if we've read the header
2875 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
2876 if (attr
&& line_header
)
2878 unsigned int macro_offset
= DW_UNSND (attr
);
2879 dwarf_decode_macros (line_header
, macro_offset
,
2880 comp_dir
, abfd
, cu
);
2882 do_cleanups (back_to
);
2886 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
2887 struct dwarf2_cu
*cu
)
2889 struct function_range
*thisfn
;
2891 thisfn
= (struct function_range
*)
2892 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
2893 thisfn
->name
= name
;
2894 thisfn
->lowpc
= lowpc
;
2895 thisfn
->highpc
= highpc
;
2896 thisfn
->seen_line
= 0;
2897 thisfn
->next
= NULL
;
2899 if (cu
->last_fn
== NULL
)
2900 cu
->first_fn
= thisfn
;
2902 cu
->last_fn
->next
= thisfn
;
2904 cu
->last_fn
= thisfn
;
2908 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
2910 struct objfile
*objfile
= cu
->objfile
;
2911 struct context_stack
*new;
2914 struct die_info
*child_die
;
2915 struct attribute
*attr
;
2917 const char *previous_prefix
= processing_current_prefix
;
2918 struct cleanup
*back_to
= NULL
;
2920 struct block
*block
;
2922 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2924 name
= dwarf2_linkage_name (die
, cu
);
2926 /* Ignore functions with missing or empty names and functions with
2927 missing or invalid low and high pc attributes. */
2928 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
2931 if (cu
->language
== language_cplus
2932 || cu
->language
== language_java
)
2934 struct die_info
*spec_die
= die_specification (die
, cu
);
2936 /* NOTE: carlton/2004-01-23: We have to be careful in the
2937 presence of DW_AT_specification. For example, with GCC 3.4,
2942 // Definition of N::foo.
2946 then we'll have a tree of DIEs like this:
2948 1: DW_TAG_compile_unit
2949 2: DW_TAG_namespace // N
2950 3: DW_TAG_subprogram // declaration of N::foo
2951 4: DW_TAG_subprogram // definition of N::foo
2952 DW_AT_specification // refers to die #3
2954 Thus, when processing die #4, we have to pretend that we're
2955 in the context of its DW_AT_specification, namely the contex
2958 if (spec_die
!= NULL
)
2960 char *specification_prefix
= determine_prefix (spec_die
, cu
);
2961 processing_current_prefix
= specification_prefix
;
2962 back_to
= make_cleanup (xfree
, specification_prefix
);
2969 /* Record the function range for dwarf_decode_lines. */
2970 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
2972 new = push_context (0, lowpc
);
2973 new->name
= new_symbol (die
, die
->type
, cu
);
2975 /* If there is a location expression for DW_AT_frame_base, record
2977 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
2979 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
2980 expression is being recorded directly in the function's symbol
2981 and not in a separate frame-base object. I guess this hack is
2982 to avoid adding some sort of frame-base adjunct/annex to the
2983 function's symbol :-(. The problem with doing this is that it
2984 results in a function symbol with a location expression that
2985 has nothing to do with the location of the function, ouch! The
2986 relationship should be: a function's symbol has-a frame base; a
2987 frame-base has-a location expression. */
2988 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
2990 cu
->list_in_scope
= &local_symbols
;
2992 if (die
->child
!= NULL
)
2994 child_die
= die
->child
;
2995 while (child_die
&& child_die
->tag
)
2997 process_die (child_die
, cu
);
2998 child_die
= sibling_die (child_die
);
3002 new = pop_context ();
3003 /* Make a block for the local symbols within. */
3004 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3005 lowpc
, highpc
, objfile
);
3007 /* If we have address ranges, record them. */
3008 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3010 /* In C++, we can have functions nested inside functions (e.g., when
3011 a function declares a class that has methods). This means that
3012 when we finish processing a function scope, we may need to go
3013 back to building a containing block's symbol lists. */
3014 local_symbols
= new->locals
;
3015 param_symbols
= new->params
;
3017 /* If we've finished processing a top-level function, subsequent
3018 symbols go in the file symbol list. */
3019 if (outermost_context_p ())
3020 cu
->list_in_scope
= &file_symbols
;
3022 processing_current_prefix
= previous_prefix
;
3023 if (back_to
!= NULL
)
3024 do_cleanups (back_to
);
3027 /* Process all the DIES contained within a lexical block scope. Start
3028 a new scope, process the dies, and then close the scope. */
3031 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3033 struct objfile
*objfile
= cu
->objfile
;
3034 struct context_stack
*new;
3035 CORE_ADDR lowpc
, highpc
;
3036 struct die_info
*child_die
;
3039 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3041 /* Ignore blocks with missing or invalid low and high pc attributes. */
3042 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3043 as multiple lexical blocks? Handling children in a sane way would
3044 be nasty. Might be easier to properly extend generic blocks to
3046 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
3051 push_context (0, lowpc
);
3052 if (die
->child
!= NULL
)
3054 child_die
= die
->child
;
3055 while (child_die
&& child_die
->tag
)
3057 process_die (child_die
, cu
);
3058 child_die
= sibling_die (child_die
);
3061 new = pop_context ();
3063 if (local_symbols
!= NULL
)
3066 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3069 /* Note that recording ranges after traversing children, as we
3070 do here, means that recording a parent's ranges entails
3071 walking across all its children's ranges as they appear in
3072 the address map, which is quadratic behavior.
3074 It would be nicer to record the parent's ranges before
3075 traversing its children, simply overriding whatever you find
3076 there. But since we don't even decide whether to create a
3077 block until after we've traversed its children, that's hard
3079 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3081 local_symbols
= new->locals
;
3084 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3085 Return 1 if the attributes are present and valid, otherwise, return 0. */
3088 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
3089 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
)
3091 struct objfile
*objfile
= cu
->objfile
;
3092 struct comp_unit_head
*cu_header
= &cu
->header
;
3093 bfd
*obfd
= objfile
->obfd
;
3094 unsigned int addr_size
= cu_header
->addr_size
;
3095 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3096 /* Base address selection entry. */
3106 found_base
= cu_header
->base_known
;
3107 base
= cu_header
->base_address
;
3109 if (offset
>= dwarf2_per_objfile
->ranges_size
)
3111 complaint (&symfile_complaints
,
3112 _("Offset %d out of bounds for DW_AT_ranges attribute"),
3116 buffer
= dwarf2_per_objfile
->ranges_buffer
+ offset
;
3118 /* Read in the largest possible address. */
3119 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
3120 if ((marker
& mask
) == mask
)
3122 /* If we found the largest possible address, then
3123 read the base address. */
3124 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3125 buffer
+= 2 * addr_size
;
3126 offset
+= 2 * addr_size
;
3134 CORE_ADDR range_beginning
, range_end
;
3136 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
3137 buffer
+= addr_size
;
3138 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
3139 buffer
+= addr_size
;
3140 offset
+= 2 * addr_size
;
3142 /* An end of list marker is a pair of zero addresses. */
3143 if (range_beginning
== 0 && range_end
== 0)
3144 /* Found the end of list entry. */
3147 /* Each base address selection entry is a pair of 2 values.
3148 The first is the largest possible address, the second is
3149 the base address. Check for a base address here. */
3150 if ((range_beginning
& mask
) == mask
)
3152 /* If we found the largest possible address, then
3153 read the base address. */
3154 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3161 /* We have no valid base address for the ranges
3163 complaint (&symfile_complaints
,
3164 _("Invalid .debug_ranges data (no base address)"));
3168 range_beginning
+= base
;
3171 /* FIXME: This is recording everything as a low-high
3172 segment of consecutive addresses. We should have a
3173 data structure for discontiguous block ranges
3177 low
= range_beginning
;
3183 if (range_beginning
< low
)
3184 low
= range_beginning
;
3185 if (range_end
> high
)
3191 /* If the first entry is an end-of-list marker, the range
3192 describes an empty scope, i.e. no instructions. */
3198 *high_return
= high
;
3202 /* Get low and high pc attributes from a die. Return 1 if the attributes
3203 are present and valid, otherwise, return 0. Return -1 if the range is
3204 discontinuous, i.e. derived from DW_AT_ranges information. */
3206 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
3207 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
3209 struct attribute
*attr
;
3214 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
3217 high
= DW_ADDR (attr
);
3218 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3220 low
= DW_ADDR (attr
);
3222 /* Found high w/o low attribute. */
3225 /* Found consecutive range of addresses. */
3230 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
3233 /* Value of the DW_AT_ranges attribute is the offset in the
3234 .debug_ranges section. */
3235 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
))
3237 /* Found discontinuous range of addresses. */
3245 /* When using the GNU linker, .gnu.linkonce. sections are used to
3246 eliminate duplicate copies of functions and vtables and such.
3247 The linker will arbitrarily choose one and discard the others.
3248 The AT_*_pc values for such functions refer to local labels in
3249 these sections. If the section from that file was discarded, the
3250 labels are not in the output, so the relocs get a value of 0.
3251 If this is a discarded function, mark the pc bounds as invalid,
3252 so that GDB will ignore it. */
3253 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3261 /* Get the low and high pc's represented by the scope DIE, and store
3262 them in *LOWPC and *HIGHPC. If the correct values can't be
3263 determined, set *LOWPC to -1 and *HIGHPC to 0. */
3266 get_scope_pc_bounds (struct die_info
*die
,
3267 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3268 struct dwarf2_cu
*cu
)
3270 CORE_ADDR best_low
= (CORE_ADDR
) -1;
3271 CORE_ADDR best_high
= (CORE_ADDR
) 0;
3272 CORE_ADDR current_low
, current_high
;
3274 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
))
3276 best_low
= current_low
;
3277 best_high
= current_high
;
3281 struct die_info
*child
= die
->child
;
3283 while (child
&& child
->tag
)
3285 switch (child
->tag
) {
3286 case DW_TAG_subprogram
:
3287 if (dwarf2_get_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
))
3289 best_low
= min (best_low
, current_low
);
3290 best_high
= max (best_high
, current_high
);
3293 case DW_TAG_namespace
:
3294 /* FIXME: carlton/2004-01-16: Should we do this for
3295 DW_TAG_class_type/DW_TAG_structure_type, too? I think
3296 that current GCC's always emit the DIEs corresponding
3297 to definitions of methods of classes as children of a
3298 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
3299 the DIEs giving the declarations, which could be
3300 anywhere). But I don't see any reason why the
3301 standards says that they have to be there. */
3302 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
3304 if (current_low
!= ((CORE_ADDR
) -1))
3306 best_low
= min (best_low
, current_low
);
3307 best_high
= max (best_high
, current_high
);
3315 child
= sibling_die (child
);
3320 *highpc
= best_high
;
3323 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
3326 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
3327 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
3329 struct attribute
*attr
;
3331 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
3334 CORE_ADDR high
= DW_ADDR (attr
);
3335 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3338 CORE_ADDR low
= DW_ADDR (attr
);
3339 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
3343 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
3346 bfd
*obfd
= cu
->objfile
->obfd
;
3348 /* The value of the DW_AT_ranges attribute is the offset of the
3349 address range list in the .debug_ranges section. */
3350 unsigned long offset
= DW_UNSND (attr
);
3351 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges_buffer
+ offset
;
3353 /* For some target architectures, but not others, the
3354 read_address function sign-extends the addresses it returns.
3355 To recognize base address selection entries, we need a
3357 unsigned int addr_size
= cu
->header
.addr_size
;
3358 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3360 /* The base address, to which the next pair is relative. Note
3361 that this 'base' is a DWARF concept: most entries in a range
3362 list are relative, to reduce the number of relocs against the
3363 debugging information. This is separate from this function's
3364 'baseaddr' argument, which GDB uses to relocate debugging
3365 information from a shared library based on the address at
3366 which the library was loaded. */
3367 CORE_ADDR base
= cu
->header
.base_address
;
3368 int base_known
= cu
->header
.base_known
;
3370 if (offset
>= dwarf2_per_objfile
->ranges_size
)
3372 complaint (&symfile_complaints
,
3373 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
3380 unsigned int bytes_read
;
3381 CORE_ADDR start
, end
;
3383 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
3384 buffer
+= bytes_read
;
3385 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
3386 buffer
+= bytes_read
;
3388 /* Did we find the end of the range list? */
3389 if (start
== 0 && end
== 0)
3392 /* Did we find a base address selection entry? */
3393 else if ((start
& base_select_mask
) == base_select_mask
)
3399 /* We found an ordinary address range. */
3404 complaint (&symfile_complaints
,
3405 _("Invalid .debug_ranges data (no base address)"));
3409 record_block_range (block
,
3410 baseaddr
+ base
+ start
,
3411 baseaddr
+ base
+ end
- 1);
3417 /* Add an aggregate field to the field list. */
3420 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
3421 struct dwarf2_cu
*cu
)
3423 struct objfile
*objfile
= cu
->objfile
;
3424 struct nextfield
*new_field
;
3425 struct attribute
*attr
;
3427 char *fieldname
= "";
3429 /* Allocate a new field list entry and link it in. */
3430 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
3431 make_cleanup (xfree
, new_field
);
3432 memset (new_field
, 0, sizeof (struct nextfield
));
3433 new_field
->next
= fip
->fields
;
3434 fip
->fields
= new_field
;
3437 /* Handle accessibility and virtuality of field.
3438 The default accessibility for members is public, the default
3439 accessibility for inheritance is private. */
3440 if (die
->tag
!= DW_TAG_inheritance
)
3441 new_field
->accessibility
= DW_ACCESS_public
;
3443 new_field
->accessibility
= DW_ACCESS_private
;
3444 new_field
->virtuality
= DW_VIRTUALITY_none
;
3446 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3448 new_field
->accessibility
= DW_UNSND (attr
);
3449 if (new_field
->accessibility
!= DW_ACCESS_public
)
3450 fip
->non_public_fields
= 1;
3451 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
3453 new_field
->virtuality
= DW_UNSND (attr
);
3455 fp
= &new_field
->field
;
3457 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
3459 /* Data member other than a C++ static data member. */
3461 /* Get type of field. */
3462 fp
->type
= die_type (die
, cu
);
3464 FIELD_STATIC_KIND (*fp
) = 0;
3466 /* Get bit size of field (zero if none). */
3467 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
3470 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
3474 FIELD_BITSIZE (*fp
) = 0;
3477 /* Get bit offset of field. */
3478 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3481 if (attr_form_is_section_offset (attr
))
3483 dwarf2_complex_location_expr_complaint ();
3484 FIELD_BITPOS (*fp
) = 0;
3486 else if (attr_form_is_constant (attr
))
3487 FIELD_BITPOS (*fp
) = dwarf2_get_attr_constant_value (attr
, 0);
3489 FIELD_BITPOS (*fp
) =
3490 decode_locdesc (DW_BLOCK (attr
), cu
) * bits_per_byte
;
3493 FIELD_BITPOS (*fp
) = 0;
3494 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
3497 if (BITS_BIG_ENDIAN
)
3499 /* For big endian bits, the DW_AT_bit_offset gives the
3500 additional bit offset from the MSB of the containing
3501 anonymous object to the MSB of the field. We don't
3502 have to do anything special since we don't need to
3503 know the size of the anonymous object. */
3504 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
3508 /* For little endian bits, compute the bit offset to the
3509 MSB of the anonymous object, subtract off the number of
3510 bits from the MSB of the field to the MSB of the
3511 object, and then subtract off the number of bits of
3512 the field itself. The result is the bit offset of
3513 the LSB of the field. */
3515 int bit_offset
= DW_UNSND (attr
);
3517 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
3520 /* The size of the anonymous object containing
3521 the bit field is explicit, so use the
3522 indicated size (in bytes). */
3523 anonymous_size
= DW_UNSND (attr
);
3527 /* The size of the anonymous object containing
3528 the bit field must be inferred from the type
3529 attribute of the data member containing the
3531 anonymous_size
= TYPE_LENGTH (fp
->type
);
3533 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
3534 - bit_offset
- FIELD_BITSIZE (*fp
);
3538 /* Get name of field. */
3539 fieldname
= dwarf2_name (die
, cu
);
3540 if (fieldname
== NULL
)
3543 /* The name is already allocated along with this objfile, so we don't
3544 need to duplicate it for the type. */
3545 fp
->name
= fieldname
;
3547 /* Change accessibility for artificial fields (e.g. virtual table
3548 pointer or virtual base class pointer) to private. */
3549 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
3551 new_field
->accessibility
= DW_ACCESS_private
;
3552 fip
->non_public_fields
= 1;
3555 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
3557 /* C++ static member. */
3559 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
3560 is a declaration, but all versions of G++ as of this writing
3561 (so through at least 3.2.1) incorrectly generate
3562 DW_TAG_variable tags. */
3566 /* Get name of field. */
3567 fieldname
= dwarf2_name (die
, cu
);
3568 if (fieldname
== NULL
)
3571 /* Get physical name. */
3572 physname
= dwarf2_linkage_name (die
, cu
);
3574 /* The name is already allocated along with this objfile, so we don't
3575 need to duplicate it for the type. */
3576 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
3577 FIELD_TYPE (*fp
) = die_type (die
, cu
);
3578 FIELD_NAME (*fp
) = fieldname
;
3580 else if (die
->tag
== DW_TAG_inheritance
)
3582 /* C++ base class field. */
3583 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3585 FIELD_BITPOS (*fp
) = (decode_locdesc (DW_BLOCK (attr
), cu
)
3587 FIELD_BITSIZE (*fp
) = 0;
3588 FIELD_STATIC_KIND (*fp
) = 0;
3589 FIELD_TYPE (*fp
) = die_type (die
, cu
);
3590 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
3591 fip
->nbaseclasses
++;
3595 /* Create the vector of fields, and attach it to the type. */
3598 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3599 struct dwarf2_cu
*cu
)
3601 int nfields
= fip
->nfields
;
3603 /* Record the field count, allocate space for the array of fields,
3604 and create blank accessibility bitfields if necessary. */
3605 TYPE_NFIELDS (type
) = nfields
;
3606 TYPE_FIELDS (type
) = (struct field
*)
3607 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3608 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3610 if (fip
->non_public_fields
)
3612 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3614 TYPE_FIELD_PRIVATE_BITS (type
) =
3615 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3616 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3618 TYPE_FIELD_PROTECTED_BITS (type
) =
3619 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3620 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3622 TYPE_FIELD_IGNORE_BITS (type
) =
3623 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3624 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3627 /* If the type has baseclasses, allocate and clear a bit vector for
3628 TYPE_FIELD_VIRTUAL_BITS. */
3629 if (fip
->nbaseclasses
)
3631 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
3632 unsigned char *pointer
;
3634 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3635 pointer
= TYPE_ALLOC (type
, num_bytes
);
3636 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
3637 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
3638 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
3641 /* Copy the saved-up fields into the field vector. Start from the head
3642 of the list, adding to the tail of the field array, so that they end
3643 up in the same order in the array in which they were added to the list. */
3644 while (nfields
-- > 0)
3646 TYPE_FIELD (type
, nfields
) = fip
->fields
->field
;
3647 switch (fip
->fields
->accessibility
)
3649 case DW_ACCESS_private
:
3650 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3653 case DW_ACCESS_protected
:
3654 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3657 case DW_ACCESS_public
:
3661 /* Unknown accessibility. Complain and treat it as public. */
3663 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
3664 fip
->fields
->accessibility
);
3668 if (nfields
< fip
->nbaseclasses
)
3670 switch (fip
->fields
->virtuality
)
3672 case DW_VIRTUALITY_virtual
:
3673 case DW_VIRTUALITY_pure_virtual
:
3674 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
3678 fip
->fields
= fip
->fields
->next
;
3682 /* Add a member function to the proper fieldlist. */
3685 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
3686 struct type
*type
, struct dwarf2_cu
*cu
)
3688 struct objfile
*objfile
= cu
->objfile
;
3689 struct attribute
*attr
;
3690 struct fnfieldlist
*flp
;
3692 struct fn_field
*fnp
;
3695 struct nextfnfield
*new_fnfield
;
3697 /* Get name of member function. */
3698 fieldname
= dwarf2_name (die
, cu
);
3699 if (fieldname
== NULL
)
3702 /* Get the mangled name. */
3703 physname
= dwarf2_linkage_name (die
, cu
);
3705 /* Look up member function name in fieldlist. */
3706 for (i
= 0; i
< fip
->nfnfields
; i
++)
3708 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
3712 /* Create new list element if necessary. */
3713 if (i
< fip
->nfnfields
)
3714 flp
= &fip
->fnfieldlists
[i
];
3717 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
3719 fip
->fnfieldlists
= (struct fnfieldlist
*)
3720 xrealloc (fip
->fnfieldlists
,
3721 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
3722 * sizeof (struct fnfieldlist
));
3723 if (fip
->nfnfields
== 0)
3724 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
3726 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
3727 flp
->name
= fieldname
;
3733 /* Create a new member function field and chain it to the field list
3735 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
3736 make_cleanup (xfree
, new_fnfield
);
3737 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
3738 new_fnfield
->next
= flp
->head
;
3739 flp
->head
= new_fnfield
;
3742 /* Fill in the member function field info. */
3743 fnp
= &new_fnfield
->fnfield
;
3744 /* The name is already allocated along with this objfile, so we don't
3745 need to duplicate it for the type. */
3746 fnp
->physname
= physname
? physname
: "";
3747 fnp
->type
= alloc_type (objfile
);
3748 if (die
->type
&& TYPE_CODE (die
->type
) == TYPE_CODE_FUNC
)
3750 int nparams
= TYPE_NFIELDS (die
->type
);
3752 /* TYPE is the domain of this method, and DIE->TYPE is the type
3753 of the method itself (TYPE_CODE_METHOD). */
3754 smash_to_method_type (fnp
->type
, type
,
3755 TYPE_TARGET_TYPE (die
->type
),
3756 TYPE_FIELDS (die
->type
),
3757 TYPE_NFIELDS (die
->type
),
3758 TYPE_VARARGS (die
->type
));
3760 /* Handle static member functions.
3761 Dwarf2 has no clean way to discern C++ static and non-static
3762 member functions. G++ helps GDB by marking the first
3763 parameter for non-static member functions (which is the
3764 this pointer) as artificial. We obtain this information
3765 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
3766 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (die
->type
, 0) == 0)
3767 fnp
->voffset
= VOFFSET_STATIC
;
3770 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
3773 /* Get fcontext from DW_AT_containing_type if present. */
3774 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
3775 fnp
->fcontext
= die_containing_type (die
, cu
);
3777 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
3778 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
3780 /* Get accessibility. */
3781 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3784 switch (DW_UNSND (attr
))
3786 case DW_ACCESS_private
:
3787 fnp
->is_private
= 1;
3789 case DW_ACCESS_protected
:
3790 fnp
->is_protected
= 1;
3795 /* Check for artificial methods. */
3796 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
3797 if (attr
&& DW_UNSND (attr
) != 0)
3798 fnp
->is_artificial
= 1;
3800 /* Get index in virtual function table if it is a virtual member function. */
3801 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
3804 /* Support the .debug_loc offsets */
3805 if (attr_form_is_block (attr
))
3807 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
3809 else if (attr_form_is_section_offset (attr
))
3811 dwarf2_complex_location_expr_complaint ();
3815 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
3821 /* Create the vector of member function fields, and attach it to the type. */
3824 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
3825 struct dwarf2_cu
*cu
)
3827 struct fnfieldlist
*flp
;
3828 int total_length
= 0;
3831 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3832 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
3833 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
3835 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
3837 struct nextfnfield
*nfp
= flp
->head
;
3838 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
3841 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
3842 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
3843 fn_flp
->fn_fields
= (struct fn_field
*)
3844 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
3845 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
3846 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
3848 total_length
+= flp
->length
;
3851 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
3852 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
3855 /* Returns non-zero if NAME is the name of a vtable member in CU's
3856 language, zero otherwise. */
3858 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
3860 static const char vptr
[] = "_vptr";
3861 static const char vtable
[] = "vtable";
3863 /* Look for the C++ and Java forms of the vtable. */
3864 if ((cu
->language
== language_java
3865 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
3866 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
3867 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
3873 /* GCC outputs unnamed structures that are really pointers to member
3874 functions, with the ABI-specified layout. If DIE (from CU) describes
3875 such a structure, set its type, and return nonzero. Otherwise return
3878 GCC shouldn't do this; it should just output pointer to member DIEs.
3879 This is GCC PR debug/28767. */
3882 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
3884 struct objfile
*objfile
= cu
->objfile
;
3886 struct die_info
*pfn_die
, *delta_die
;
3887 struct attribute
*pfn_name
, *delta_name
;
3888 struct type
*pfn_type
, *domain_type
;
3890 /* Check for a structure with no name and two children. */
3891 if (die
->tag
!= DW_TAG_structure_type
3892 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
3893 || die
->child
== NULL
3894 || die
->child
->sibling
== NULL
3895 || (die
->child
->sibling
->sibling
!= NULL
3896 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
3899 /* Check for __pfn and __delta members. */
3900 pfn_die
= die
->child
;
3901 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
3902 if (pfn_die
->tag
!= DW_TAG_member
3904 || DW_STRING (pfn_name
) == NULL
3905 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
3908 delta_die
= pfn_die
->sibling
;
3909 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
3910 if (delta_die
->tag
!= DW_TAG_member
3911 || delta_name
== NULL
3912 || DW_STRING (delta_name
) == NULL
3913 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
3916 /* Find the type of the method. */
3917 pfn_type
= die_type (pfn_die
, cu
);
3918 if (pfn_type
== NULL
3919 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
3920 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
3923 /* Look for the "this" argument. */
3924 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
3925 if (TYPE_NFIELDS (pfn_type
) == 0
3926 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
3929 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
3930 type
= alloc_type (objfile
);
3931 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
3932 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
3933 TYPE_VARARGS (pfn_type
));
3934 type
= lookup_methodptr_type (type
);
3935 set_die_type (die
, type
, cu
);
3940 /* Called when we find the DIE that starts a structure or union scope
3941 (definition) to process all dies that define the members of the
3944 NOTE: we need to call struct_type regardless of whether or not the
3945 DIE has an at_name attribute, since it might be an anonymous
3946 structure or union. This gets the type entered into our set of
3949 However, if the structure is incomplete (an opaque struct/union)
3950 then suppress creating a symbol table entry for it since gdb only
3951 wants to find the one with the complete definition. Note that if
3952 it is complete, we just call new_symbol, which does it's own
3953 checking about whether the struct/union is anonymous or not (and
3954 suppresses creating a symbol table entry itself). */
3957 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
3959 struct objfile
*objfile
= cu
->objfile
;
3961 struct attribute
*attr
;
3962 const char *previous_prefix
= processing_current_prefix
;
3963 struct cleanup
*back_to
= NULL
;
3969 if (quirk_gcc_member_function_pointer (die
, cu
))
3972 type
= alloc_type (objfile
);
3973 INIT_CPLUS_SPECIFIC (type
);
3974 name
= dwarf2_name (die
, cu
);
3977 if (cu
->language
== language_cplus
3978 || cu
->language
== language_java
)
3980 char *new_prefix
= determine_class_name (die
, cu
);
3981 TYPE_TAG_NAME (type
) = obsavestring (new_prefix
,
3982 strlen (new_prefix
),
3983 &objfile
->objfile_obstack
);
3984 back_to
= make_cleanup (xfree
, new_prefix
);
3985 processing_current_prefix
= new_prefix
;
3989 /* The name is already allocated along with this objfile, so
3990 we don't need to duplicate it for the type. */
3991 TYPE_TAG_NAME (type
) = name
;
3995 if (die
->tag
== DW_TAG_structure_type
)
3997 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
3999 else if (die
->tag
== DW_TAG_union_type
)
4001 TYPE_CODE (type
) = TYPE_CODE_UNION
;
4005 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
4007 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
4010 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4013 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4017 TYPE_LENGTH (type
) = 0;
4020 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB_SUPPORTED
;
4021 if (die_is_declaration (die
, cu
))
4022 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
4024 /* We need to add the type field to the die immediately so we don't
4025 infinitely recurse when dealing with pointers to the structure
4026 type within the structure itself. */
4027 set_die_type (die
, type
, cu
);
4029 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
4031 struct field_info fi
;
4032 struct die_info
*child_die
;
4033 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
4035 memset (&fi
, 0, sizeof (struct field_info
));
4037 child_die
= die
->child
;
4039 while (child_die
&& child_die
->tag
)
4041 if (child_die
->tag
== DW_TAG_member
4042 || child_die
->tag
== DW_TAG_variable
)
4044 /* NOTE: carlton/2002-11-05: A C++ static data member
4045 should be a DW_TAG_member that is a declaration, but
4046 all versions of G++ as of this writing (so through at
4047 least 3.2.1) incorrectly generate DW_TAG_variable
4048 tags for them instead. */
4049 dwarf2_add_field (&fi
, child_die
, cu
);
4051 else if (child_die
->tag
== DW_TAG_subprogram
)
4053 /* C++ member function. */
4054 read_type_die (child_die
, cu
);
4055 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
4057 else if (child_die
->tag
== DW_TAG_inheritance
)
4059 /* C++ base class field. */
4060 dwarf2_add_field (&fi
, child_die
, cu
);
4062 child_die
= sibling_die (child_die
);
4065 /* Attach fields and member functions to the type. */
4067 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
4070 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
4072 /* Get the type which refers to the base class (possibly this
4073 class itself) which contains the vtable pointer for the current
4074 class from the DW_AT_containing_type attribute. */
4076 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4078 struct type
*t
= die_containing_type (die
, cu
);
4080 TYPE_VPTR_BASETYPE (type
) = t
;
4085 /* Our own class provides vtbl ptr. */
4086 for (i
= TYPE_NFIELDS (t
) - 1;
4087 i
>= TYPE_N_BASECLASSES (t
);
4090 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
4092 if (is_vtable_name (fieldname
, cu
))
4094 TYPE_VPTR_FIELDNO (type
) = i
;
4099 /* Complain if virtual function table field not found. */
4100 if (i
< TYPE_N_BASECLASSES (t
))
4101 complaint (&symfile_complaints
,
4102 _("virtual function table pointer not found when defining class '%s'"),
4103 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
4108 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
4111 else if (cu
->producer
4112 && strncmp (cu
->producer
,
4113 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
4115 /* The IBM XLC compiler does not provide direct indication
4116 of the containing type, but the vtable pointer is
4117 always named __vfp. */
4121 for (i
= TYPE_NFIELDS (type
) - 1;
4122 i
>= TYPE_N_BASECLASSES (type
);
4125 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
4127 TYPE_VPTR_FIELDNO (type
) = i
;
4128 TYPE_VPTR_BASETYPE (type
) = type
;
4135 do_cleanups (back_to
);
4138 processing_current_prefix
= previous_prefix
;
4139 if (back_to
!= NULL
)
4140 do_cleanups (back_to
);
4144 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4146 struct objfile
*objfile
= cu
->objfile
;
4147 const char *previous_prefix
= processing_current_prefix
;
4148 struct die_info
*child_die
= die
->child
;
4150 if (TYPE_TAG_NAME (die
->type
) != NULL
)
4151 processing_current_prefix
= TYPE_TAG_NAME (die
->type
);
4153 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
4154 snapshots) has been known to create a die giving a declaration
4155 for a class that has, as a child, a die giving a definition for a
4156 nested class. So we have to process our children even if the
4157 current die is a declaration. Normally, of course, a declaration
4158 won't have any children at all. */
4160 while (child_die
!= NULL
&& child_die
->tag
)
4162 if (child_die
->tag
== DW_TAG_member
4163 || child_die
->tag
== DW_TAG_variable
4164 || child_die
->tag
== DW_TAG_inheritance
)
4169 process_die (child_die
, cu
);
4171 child_die
= sibling_die (child_die
);
4174 /* Do not consider external references. According to the DWARF standard,
4175 these DIEs are identified by the fact that they have no byte_size
4176 attribute, and a declaration attribute. */
4177 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
4178 || !die_is_declaration (die
, cu
))
4179 new_symbol (die
, die
->type
, cu
);
4181 processing_current_prefix
= previous_prefix
;
4184 /* Given a DW_AT_enumeration_type die, set its type. We do not
4185 complete the type's fields yet, or create any symbols. */
4188 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4190 struct objfile
*objfile
= cu
->objfile
;
4192 struct attribute
*attr
;
4198 type
= alloc_type (objfile
);
4200 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
4201 name
= dwarf2_name (die
, cu
);
4204 if (processing_has_namespace_info
)
4206 TYPE_TAG_NAME (type
) = typename_concat (&objfile
->objfile_obstack
,
4207 processing_current_prefix
,
4212 /* The name is already allocated along with this objfile, so
4213 we don't need to duplicate it for the type. */
4214 TYPE_TAG_NAME (type
) = name
;
4218 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4221 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4225 TYPE_LENGTH (type
) = 0;
4228 set_die_type (die
, type
, cu
);
4231 /* Determine the name of the type represented by DIE, which should be
4232 a named C++ or Java compound type. Return the name in question; the caller
4233 is responsible for xfree()'ing it. */
4236 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
4238 struct cleanup
*back_to
= NULL
;
4239 struct die_info
*spec_die
= die_specification (die
, cu
);
4240 char *new_prefix
= NULL
;
4242 /* If this is the definition of a class that is declared by another
4243 die, then processing_current_prefix may not be accurate; see
4244 read_func_scope for a similar example. */
4245 if (spec_die
!= NULL
)
4247 char *specification_prefix
= determine_prefix (spec_die
, cu
);
4248 processing_current_prefix
= specification_prefix
;
4249 back_to
= make_cleanup (xfree
, specification_prefix
);
4252 /* If we don't have namespace debug info, guess the name by trying
4253 to demangle the names of members, just like we did in
4254 guess_structure_name. */
4255 if (!processing_has_namespace_info
)
4257 struct die_info
*child
;
4259 for (child
= die
->child
;
4260 child
!= NULL
&& child
->tag
!= 0;
4261 child
= sibling_die (child
))
4263 if (child
->tag
== DW_TAG_subprogram
)
4266 = language_class_name_from_physname (cu
->language_defn
,
4270 if (new_prefix
!= NULL
)
4276 if (new_prefix
== NULL
)
4278 const char *name
= dwarf2_name (die
, cu
);
4279 new_prefix
= typename_concat (NULL
, processing_current_prefix
,
4280 name
? name
: "<<anonymous>>",
4284 if (back_to
!= NULL
)
4285 do_cleanups (back_to
);
4290 /* Given a pointer to a die which begins an enumeration, process all
4291 the dies that define the members of the enumeration, and create the
4292 symbol for the enumeration type.
4294 NOTE: We reverse the order of the element list. */
4297 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4299 struct objfile
*objfile
= cu
->objfile
;
4300 struct die_info
*child_die
;
4301 struct field
*fields
;
4304 int unsigned_enum
= 1;
4309 if (die
->child
!= NULL
)
4311 child_die
= die
->child
;
4312 while (child_die
&& child_die
->tag
)
4314 if (child_die
->tag
!= DW_TAG_enumerator
)
4316 process_die (child_die
, cu
);
4320 name
= dwarf2_name (child_die
, cu
);
4323 sym
= new_symbol (child_die
, die
->type
, cu
);
4324 if (SYMBOL_VALUE (sym
) < 0)
4327 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4329 fields
= (struct field
*)
4331 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
4332 * sizeof (struct field
));
4335 FIELD_NAME (fields
[num_fields
]) = DEPRECATED_SYMBOL_NAME (sym
);
4336 FIELD_TYPE (fields
[num_fields
]) = NULL
;
4337 FIELD_BITPOS (fields
[num_fields
]) = SYMBOL_VALUE (sym
);
4338 FIELD_BITSIZE (fields
[num_fields
]) = 0;
4339 FIELD_STATIC_KIND (fields
[num_fields
]) = 0;
4345 child_die
= sibling_die (child_die
);
4350 TYPE_NFIELDS (die
->type
) = num_fields
;
4351 TYPE_FIELDS (die
->type
) = (struct field
*)
4352 TYPE_ALLOC (die
->type
, sizeof (struct field
) * num_fields
);
4353 memcpy (TYPE_FIELDS (die
->type
), fields
,
4354 sizeof (struct field
) * num_fields
);
4358 TYPE_FLAGS (die
->type
) |= TYPE_FLAG_UNSIGNED
;
4361 new_symbol (die
, die
->type
, cu
);
4364 /* Extract all information from a DW_TAG_array_type DIE and put it in
4365 the DIE's type field. For now, this only handles one dimensional
4369 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4371 struct objfile
*objfile
= cu
->objfile
;
4372 struct die_info
*child_die
;
4373 struct type
*type
= NULL
;
4374 struct type
*element_type
, *range_type
, *index_type
;
4375 struct type
**range_types
= NULL
;
4376 struct attribute
*attr
;
4378 struct cleanup
*back_to
;
4381 /* Return if we've already decoded this type. */
4387 element_type
= die_type (die
, cu
);
4389 /* Irix 6.2 native cc creates array types without children for
4390 arrays with unspecified length. */
4391 if (die
->child
== NULL
)
4393 index_type
= builtin_type_int32
;
4394 range_type
= create_range_type (NULL
, index_type
, 0, -1);
4395 set_die_type (die
, create_array_type (NULL
, element_type
, range_type
),
4400 back_to
= make_cleanup (null_cleanup
, NULL
);
4401 child_die
= die
->child
;
4402 while (child_die
&& child_die
->tag
)
4404 if (child_die
->tag
== DW_TAG_subrange_type
)
4406 read_subrange_type (child_die
, cu
);
4408 if (child_die
->type
!= NULL
)
4410 /* The range type was succesfully read. Save it for
4411 the array type creation. */
4412 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
4414 range_types
= (struct type
**)
4415 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
4416 * sizeof (struct type
*));
4418 make_cleanup (free_current_contents
, &range_types
);
4420 range_types
[ndim
++] = child_die
->type
;
4423 child_die
= sibling_die (child_die
);
4426 /* Dwarf2 dimensions are output from left to right, create the
4427 necessary array types in backwards order. */
4429 type
= element_type
;
4431 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
4435 type
= create_array_type (NULL
, type
, range_types
[i
++]);
4440 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
4443 /* Understand Dwarf2 support for vector types (like they occur on
4444 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
4445 array type. This is not part of the Dwarf2/3 standard yet, but a
4446 custom vendor extension. The main difference between a regular
4447 array and the vector variant is that vectors are passed by value
4449 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
4451 make_vector_type (type
);
4453 name
= dwarf2_name (die
, cu
);
4455 TYPE_NAME (type
) = name
;
4457 do_cleanups (back_to
);
4459 /* Install the type in the die. */
4460 set_die_type (die
, type
, cu
);
4463 static enum dwarf_array_dim_ordering
4464 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
4466 struct attribute
*attr
;
4468 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
4470 if (attr
) return DW_SND (attr
);
4473 GNU F77 is a special case, as at 08/2004 array type info is the
4474 opposite order to the dwarf2 specification, but data is still
4475 laid out as per normal fortran.
4477 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
4481 if (cu
->language
== language_fortran
&&
4482 cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
4484 return DW_ORD_row_major
;
4487 switch (cu
->language_defn
->la_array_ordering
)
4489 case array_column_major
:
4490 return DW_ORD_col_major
;
4491 case array_row_major
:
4493 return DW_ORD_row_major
;
4497 /* Extract all information from a DW_TAG_set_type DIE and put it in
4498 the DIE's type field. */
4501 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4503 if (die
->type
== NULL
)
4504 die
->type
= create_set_type ((struct type
*) NULL
, die_type (die
, cu
));
4507 /* First cut: install each common block member as a global variable. */
4510 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
4512 struct die_info
*child_die
;
4513 struct attribute
*attr
;
4515 CORE_ADDR base
= (CORE_ADDR
) 0;
4517 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
4520 /* Support the .debug_loc offsets */
4521 if (attr_form_is_block (attr
))
4523 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
4525 else if (attr_form_is_section_offset (attr
))
4527 dwarf2_complex_location_expr_complaint ();
4531 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
4532 "common block member");
4535 if (die
->child
!= NULL
)
4537 child_die
= die
->child
;
4538 while (child_die
&& child_die
->tag
)
4540 sym
= new_symbol (child_die
, NULL
, cu
);
4541 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
4544 SYMBOL_VALUE_ADDRESS (sym
) =
4545 base
+ decode_locdesc (DW_BLOCK (attr
), cu
);
4546 add_symbol_to_list (sym
, &global_symbols
);
4548 child_die
= sibling_die (child_die
);
4553 /* Read a C++ namespace. */
4556 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4558 struct objfile
*objfile
= cu
->objfile
;
4559 const char *previous_prefix
= processing_current_prefix
;
4562 struct die_info
*current_die
;
4563 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4565 name
= namespace_name (die
, &is_anonymous
, cu
);
4567 /* Now build the name of the current namespace. */
4569 if (previous_prefix
[0] == '\0')
4571 processing_current_prefix
= name
;
4575 char *temp_name
= typename_concat (NULL
, previous_prefix
, name
, cu
);
4576 make_cleanup (xfree
, temp_name
);
4577 processing_current_prefix
= temp_name
;
4580 /* Add a symbol associated to this if we haven't seen the namespace
4581 before. Also, add a using directive if it's an anonymous
4584 if (dwarf2_extension (die
, cu
) == NULL
)
4588 /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
4589 this cast will hopefully become unnecessary. */
4590 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0,
4591 (char *) processing_current_prefix
,
4593 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
4595 new_symbol (die
, type
, cu
);
4596 set_die_type (die
, type
, cu
);
4599 cp_add_using_directive (processing_current_prefix
,
4600 strlen (previous_prefix
),
4601 strlen (processing_current_prefix
));
4604 if (die
->child
!= NULL
)
4606 struct die_info
*child_die
= die
->child
;
4608 while (child_die
&& child_die
->tag
)
4610 process_die (child_die
, cu
);
4611 child_die
= sibling_die (child_die
);
4615 processing_current_prefix
= previous_prefix
;
4616 do_cleanups (back_to
);
4619 /* Return the name of the namespace represented by DIE. Set
4620 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
4624 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
4626 struct die_info
*current_die
;
4627 const char *name
= NULL
;
4629 /* Loop through the extensions until we find a name. */
4631 for (current_die
= die
;
4632 current_die
!= NULL
;
4633 current_die
= dwarf2_extension (die
, cu
))
4635 name
= dwarf2_name (current_die
, cu
);
4640 /* Is it an anonymous namespace? */
4642 *is_anonymous
= (name
== NULL
);
4644 name
= "(anonymous namespace)";
4649 /* Extract all information from a DW_TAG_pointer_type DIE and add to
4650 the user defined type vector. */
4653 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4655 struct comp_unit_head
*cu_header
= &cu
->header
;
4657 struct attribute
*attr_byte_size
;
4658 struct attribute
*attr_address_class
;
4659 int byte_size
, addr_class
;
4666 type
= lookup_pointer_type (die_type (die
, cu
));
4668 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4670 byte_size
= DW_UNSND (attr_byte_size
);
4672 byte_size
= cu_header
->addr_size
;
4674 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
4675 if (attr_address_class
)
4676 addr_class
= DW_UNSND (attr_address_class
);
4678 addr_class
= DW_ADDR_none
;
4680 /* If the pointer size or address class is different than the
4681 default, create a type variant marked as such and set the
4682 length accordingly. */
4683 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
4685 if (gdbarch_address_class_type_flags_p (current_gdbarch
))
4689 type_flags
= gdbarch_address_class_type_flags
4690 (current_gdbarch
, byte_size
, addr_class
);
4691 gdb_assert ((type_flags
& ~TYPE_FLAG_ADDRESS_CLASS_ALL
) == 0);
4692 type
= make_type_with_address_space (type
, type_flags
);
4694 else if (TYPE_LENGTH (type
) != byte_size
)
4696 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
4699 /* Should we also complain about unhandled address classes? */
4703 TYPE_LENGTH (type
) = byte_size
;
4704 set_die_type (die
, type
, cu
);
4707 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
4708 the user defined type vector. */
4711 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4713 struct objfile
*objfile
= cu
->objfile
;
4715 struct type
*to_type
;
4716 struct type
*domain
;
4723 to_type
= die_type (die
, cu
);
4724 domain
= die_containing_type (die
, cu
);
4726 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
4727 type
= lookup_methodptr_type (to_type
);
4729 type
= lookup_memberptr_type (to_type
, domain
);
4731 set_die_type (die
, type
, cu
);
4734 /* Extract all information from a DW_TAG_reference_type DIE and add to
4735 the user defined type vector. */
4738 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4740 struct comp_unit_head
*cu_header
= &cu
->header
;
4742 struct attribute
*attr
;
4749 type
= lookup_reference_type (die_type (die
, cu
));
4750 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4753 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4757 TYPE_LENGTH (type
) = cu_header
->addr_size
;
4759 set_die_type (die
, type
, cu
);
4763 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4765 struct type
*base_type
;
4772 base_type
= die_type (die
, cu
);
4773 set_die_type (die
, make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0),
4778 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4780 struct type
*base_type
;
4787 base_type
= die_type (die
, cu
);
4788 set_die_type (die
, make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0),
4792 /* Extract all information from a DW_TAG_string_type DIE and add to
4793 the user defined type vector. It isn't really a user defined type,
4794 but it behaves like one, with other DIE's using an AT_user_def_type
4795 attribute to reference it. */
4798 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4800 struct objfile
*objfile
= cu
->objfile
;
4801 struct type
*type
, *range_type
, *index_type
, *char_type
;
4802 struct attribute
*attr
;
4803 unsigned int length
;
4810 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
4813 length
= DW_UNSND (attr
);
4817 /* check for the DW_AT_byte_size attribute */
4818 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4821 length
= DW_UNSND (attr
);
4829 index_type
= builtin_type_int32
;
4830 range_type
= create_range_type (NULL
, index_type
, 1, length
);
4831 type
= create_string_type (NULL
, range_type
);
4833 set_die_type (die
, type
, cu
);
4836 /* Handle DIES due to C code like:
4840 int (*funcp)(int a, long l);
4844 ('funcp' generates a DW_TAG_subroutine_type DIE)
4848 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4850 struct type
*type
; /* Type that this function returns */
4851 struct type
*ftype
; /* Function that returns above type */
4852 struct attribute
*attr
;
4854 /* Decode the type that this subroutine returns */
4859 type
= die_type (die
, cu
);
4860 ftype
= make_function_type (type
, (struct type
**) 0);
4862 /* All functions in C++, Pascal and Java have prototypes. */
4863 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
4864 if ((attr
&& (DW_UNSND (attr
) != 0))
4865 || cu
->language
== language_cplus
4866 || cu
->language
== language_java
4867 || cu
->language
== language_pascal
)
4868 TYPE_FLAGS (ftype
) |= TYPE_FLAG_PROTOTYPED
;
4870 if (die
->child
!= NULL
)
4872 struct die_info
*child_die
;
4876 /* Count the number of parameters.
4877 FIXME: GDB currently ignores vararg functions, but knows about
4878 vararg member functions. */
4879 child_die
= die
->child
;
4880 while (child_die
&& child_die
->tag
)
4882 if (child_die
->tag
== DW_TAG_formal_parameter
)
4884 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
4885 TYPE_FLAGS (ftype
) |= TYPE_FLAG_VARARGS
;
4886 child_die
= sibling_die (child_die
);
4889 /* Allocate storage for parameters and fill them in. */
4890 TYPE_NFIELDS (ftype
) = nparams
;
4891 TYPE_FIELDS (ftype
) = (struct field
*)
4892 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
4894 child_die
= die
->child
;
4895 while (child_die
&& child_die
->tag
)
4897 if (child_die
->tag
== DW_TAG_formal_parameter
)
4899 /* Dwarf2 has no clean way to discern C++ static and non-static
4900 member functions. G++ helps GDB by marking the first
4901 parameter for non-static member functions (which is the
4902 this pointer) as artificial. We pass this information
4903 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
4904 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
4906 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
4908 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
4909 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
4912 child_die
= sibling_die (child_die
);
4916 set_die_type (die
, ftype
, cu
);
4920 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
4922 struct objfile
*objfile
= cu
->objfile
;
4923 struct attribute
*attr
;
4928 name
= dwarf2_name (die
, cu
);
4929 set_die_type (die
, init_type (TYPE_CODE_TYPEDEF
, 0,
4930 TYPE_FLAG_TARGET_STUB
, name
, objfile
),
4932 TYPE_TARGET_TYPE (die
->type
) = die_type (die
, cu
);
4936 /* Find a representation of a given base type and install
4937 it in the TYPE field of the die. */
4940 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4942 struct objfile
*objfile
= cu
->objfile
;
4944 struct attribute
*attr
;
4945 int encoding
= 0, size
= 0;
4947 enum type_code code
= TYPE_CODE_INT
;
4949 struct type
*target_type
= NULL
;
4951 /* If we've already decoded this die, this is a no-op. */
4957 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
4960 encoding
= DW_UNSND (attr
);
4962 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4965 size
= DW_UNSND (attr
);
4967 name
= dwarf2_name (die
, cu
);
4970 complaint (&symfile_complaints
,
4971 _("DW_AT_name missing from DW_TAG_base_type"));
4976 case DW_ATE_address
:
4977 /* Turn DW_ATE_address into a void * pointer. */
4978 code
= TYPE_CODE_PTR
;
4979 type_flags
|= TYPE_FLAG_UNSIGNED
;
4980 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
4982 case DW_ATE_boolean
:
4983 code
= TYPE_CODE_BOOL
;
4984 type_flags
|= TYPE_FLAG_UNSIGNED
;
4986 case DW_ATE_complex_float
:
4987 code
= TYPE_CODE_COMPLEX
;
4988 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
4990 case DW_ATE_decimal_float
:
4991 code
= TYPE_CODE_DECFLOAT
;
4994 code
= TYPE_CODE_FLT
;
4998 case DW_ATE_unsigned
:
4999 type_flags
|= TYPE_FLAG_UNSIGNED
;
5001 case DW_ATE_signed_char
:
5002 if (cu
->language
== language_m2
)
5003 code
= TYPE_CODE_CHAR
;
5005 case DW_ATE_unsigned_char
:
5006 if (cu
->language
== language_m2
)
5007 code
= TYPE_CODE_CHAR
;
5008 type_flags
|= TYPE_FLAG_UNSIGNED
;
5011 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
5012 dwarf_type_encoding_name (encoding
));
5016 type
= init_type (code
, size
, type_flags
, name
, objfile
);
5017 TYPE_TARGET_TYPE (type
) = target_type
;
5019 set_die_type (die
, type
, cu
);
5022 /* Read the given DW_AT_subrange DIE. */
5025 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5027 struct type
*base_type
;
5028 struct type
*range_type
;
5029 struct attribute
*attr
;
5034 /* If we have already decoded this die, then nothing more to do. */
5038 base_type
= die_type (die
, cu
);
5039 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
5041 complaint (&symfile_complaints
,
5042 _("DW_AT_type missing from DW_TAG_subrange_type"));
5044 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (current_gdbarch
) / 8,
5045 0, NULL
, cu
->objfile
);
5048 if (cu
->language
== language_fortran
)
5050 /* FORTRAN implies a lower bound of 1, if not given. */
5054 /* FIXME: For variable sized arrays either of these could be
5055 a variable rather than a constant value. We'll allow it,
5056 but we don't know how to handle it. */
5057 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
5059 low
= dwarf2_get_attr_constant_value (attr
, 0);
5061 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
5064 if (attr
->form
== DW_FORM_block1
)
5066 /* GCC encodes arrays with unspecified or dynamic length
5067 with a DW_FORM_block1 attribute.
5068 FIXME: GDB does not yet know how to handle dynamic
5069 arrays properly, treat them as arrays with unspecified
5072 FIXME: jimb/2003-09-22: GDB does not really know
5073 how to handle arrays of unspecified length
5074 either; we just represent them as zero-length
5075 arrays. Choose an appropriate upper bound given
5076 the lower bound we've computed above. */
5080 high
= dwarf2_get_attr_constant_value (attr
, 1);
5083 range_type
= create_range_type (NULL
, base_type
, low
, high
);
5085 name
= dwarf2_name (die
, cu
);
5087 TYPE_NAME (range_type
) = name
;
5089 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5091 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
5093 set_die_type (die
, range_type
, cu
);
5097 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5104 /* For now, we only support the C meaning of an unspecified type: void. */
5106 type
= init_type (TYPE_CODE_VOID
, 0, 0, dwarf2_name (die
, cu
),
5109 set_die_type (die
, type
, cu
);
5112 /* Read a whole compilation unit into a linked list of dies. */
5114 static struct die_info
*
5115 read_comp_unit (gdb_byte
*info_ptr
, bfd
*abfd
, struct dwarf2_cu
*cu
)
5117 return read_die_and_children (info_ptr
, abfd
, cu
, &info_ptr
, NULL
);
5120 /* Read a single die and all its descendents. Set the die's sibling
5121 field to NULL; set other fields in the die correctly, and set all
5122 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
5123 location of the info_ptr after reading all of those dies. PARENT
5124 is the parent of the die in question. */
5126 static struct die_info
*
5127 read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
5128 struct dwarf2_cu
*cu
,
5129 gdb_byte
**new_info_ptr
,
5130 struct die_info
*parent
)
5132 struct die_info
*die
;
5136 cur_ptr
= read_full_die (&die
, abfd
, info_ptr
, cu
, &has_children
);
5137 store_in_ref_table (die
->offset
, die
, cu
);
5141 die
->child
= read_die_and_siblings (cur_ptr
, abfd
, cu
,
5147 *new_info_ptr
= cur_ptr
;
5150 die
->sibling
= NULL
;
5151 die
->parent
= parent
;
5155 /* Read a die, all of its descendents, and all of its siblings; set
5156 all of the fields of all of the dies correctly. Arguments are as
5157 in read_die_and_children. */
5159 static struct die_info
*
5160 read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
5161 struct dwarf2_cu
*cu
,
5162 gdb_byte
**new_info_ptr
,
5163 struct die_info
*parent
)
5165 struct die_info
*first_die
, *last_sibling
;
5169 first_die
= last_sibling
= NULL
;
5173 struct die_info
*die
5174 = read_die_and_children (cur_ptr
, abfd
, cu
, &cur_ptr
, parent
);
5182 last_sibling
->sibling
= die
;
5187 *new_info_ptr
= cur_ptr
;
5197 /* Free a linked list of dies. */
5200 free_die_list (struct die_info
*dies
)
5202 struct die_info
*die
, *next
;
5207 if (die
->child
!= NULL
)
5208 free_die_list (die
->child
);
5209 next
= die
->sibling
;
5216 /* Read the contents of the section at OFFSET and of size SIZE from the
5217 object file specified by OBJFILE into the objfile_obstack and return it. */
5220 dwarf2_read_section (struct objfile
*objfile
, asection
*sectp
)
5222 bfd
*abfd
= objfile
->obfd
;
5223 gdb_byte
*buf
, *retbuf
;
5224 bfd_size_type size
= bfd_get_section_size (sectp
);
5229 buf
= obstack_alloc (&objfile
->objfile_obstack
, size
);
5230 retbuf
= symfile_relocate_debug_section (abfd
, sectp
, buf
);
5234 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
5235 || bfd_bread (buf
, size
, abfd
) != size
)
5236 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5237 bfd_get_filename (abfd
));
5242 /* In DWARF version 2, the description of the debugging information is
5243 stored in a separate .debug_abbrev section. Before we read any
5244 dies from a section we read in all abbreviations and install them
5245 in a hash table. This function also sets flags in CU describing
5246 the data found in the abbrev table. */
5249 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
5251 struct comp_unit_head
*cu_header
= &cu
->header
;
5252 gdb_byte
*abbrev_ptr
;
5253 struct abbrev_info
*cur_abbrev
;
5254 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
5255 unsigned int abbrev_form
, hash_number
;
5256 struct attr_abbrev
*cur_attrs
;
5257 unsigned int allocated_attrs
;
5259 /* Initialize dwarf2 abbrevs */
5260 obstack_init (&cu
->abbrev_obstack
);
5261 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
5263 * sizeof (struct abbrev_info
*)));
5264 memset (cu
->dwarf2_abbrevs
, 0,
5265 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
5267 abbrev_ptr
= dwarf2_per_objfile
->abbrev_buffer
+ cu_header
->abbrev_offset
;
5268 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5269 abbrev_ptr
+= bytes_read
;
5271 allocated_attrs
= ATTR_ALLOC_CHUNK
;
5272 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
5274 /* loop until we reach an abbrev number of 0 */
5275 while (abbrev_number
)
5277 cur_abbrev
= dwarf_alloc_abbrev (cu
);
5279 /* read in abbrev header */
5280 cur_abbrev
->number
= abbrev_number
;
5281 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5282 abbrev_ptr
+= bytes_read
;
5283 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
5286 if (cur_abbrev
->tag
== DW_TAG_namespace
)
5287 cu
->has_namespace_info
= 1;
5289 /* now read in declarations */
5290 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5291 abbrev_ptr
+= bytes_read
;
5292 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5293 abbrev_ptr
+= bytes_read
;
5296 if (cur_abbrev
->num_attrs
== allocated_attrs
)
5298 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
5300 = xrealloc (cur_attrs
, (allocated_attrs
5301 * sizeof (struct attr_abbrev
)));
5304 /* Record whether this compilation unit might have
5305 inter-compilation-unit references. If we don't know what form
5306 this attribute will have, then it might potentially be a
5307 DW_FORM_ref_addr, so we conservatively expect inter-CU
5310 if (abbrev_form
== DW_FORM_ref_addr
5311 || abbrev_form
== DW_FORM_indirect
)
5312 cu
->has_form_ref_addr
= 1;
5314 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
5315 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
5316 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5317 abbrev_ptr
+= bytes_read
;
5318 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5319 abbrev_ptr
+= bytes_read
;
5322 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
5323 (cur_abbrev
->num_attrs
5324 * sizeof (struct attr_abbrev
)));
5325 memcpy (cur_abbrev
->attrs
, cur_attrs
,
5326 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
5328 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
5329 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
5330 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
5332 /* Get next abbreviation.
5333 Under Irix6 the abbreviations for a compilation unit are not
5334 always properly terminated with an abbrev number of 0.
5335 Exit loop if we encounter an abbreviation which we have
5336 already read (which means we are about to read the abbreviations
5337 for the next compile unit) or if the end of the abbreviation
5338 table is reached. */
5339 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev_buffer
)
5340 >= dwarf2_per_objfile
->abbrev_size
)
5342 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5343 abbrev_ptr
+= bytes_read
;
5344 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
5351 /* Release the memory used by the abbrev table for a compilation unit. */
5354 dwarf2_free_abbrev_table (void *ptr_to_cu
)
5356 struct dwarf2_cu
*cu
= ptr_to_cu
;
5358 obstack_free (&cu
->abbrev_obstack
, NULL
);
5359 cu
->dwarf2_abbrevs
= NULL
;
5362 /* Lookup an abbrev_info structure in the abbrev hash table. */
5364 static struct abbrev_info
*
5365 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
5367 unsigned int hash_number
;
5368 struct abbrev_info
*abbrev
;
5370 hash_number
= number
% ABBREV_HASH_SIZE
;
5371 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
5375 if (abbrev
->number
== number
)
5378 abbrev
= abbrev
->next
;
5383 /* Returns nonzero if TAG represents a type that we might generate a partial
5387 is_type_tag_for_partial (int tag
)
5392 /* Some types that would be reasonable to generate partial symbols for,
5393 that we don't at present. */
5394 case DW_TAG_array_type
:
5395 case DW_TAG_file_type
:
5396 case DW_TAG_ptr_to_member_type
:
5397 case DW_TAG_set_type
:
5398 case DW_TAG_string_type
:
5399 case DW_TAG_subroutine_type
:
5401 case DW_TAG_base_type
:
5402 case DW_TAG_class_type
:
5403 case DW_TAG_enumeration_type
:
5404 case DW_TAG_structure_type
:
5405 case DW_TAG_subrange_type
:
5406 case DW_TAG_typedef
:
5407 case DW_TAG_union_type
:
5414 /* Load all DIEs that are interesting for partial symbols into memory. */
5416 static struct partial_die_info
*
5417 load_partial_dies (bfd
*abfd
, gdb_byte
*info_ptr
, int building_psymtab
,
5418 struct dwarf2_cu
*cu
)
5420 struct partial_die_info
*part_die
;
5421 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
5422 struct abbrev_info
*abbrev
;
5423 unsigned int bytes_read
;
5424 unsigned int load_all
= 0;
5426 int nesting_level
= 1;
5431 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
5435 = htab_create_alloc_ex (cu
->header
.length
/ 12,
5439 &cu
->comp_unit_obstack
,
5440 hashtab_obstack_allocate
,
5441 dummy_obstack_deallocate
);
5443 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5444 sizeof (struct partial_die_info
));
5448 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
5450 /* A NULL abbrev means the end of a series of children. */
5453 if (--nesting_level
== 0)
5455 /* PART_DIE was probably the last thing allocated on the
5456 comp_unit_obstack, so we could call obstack_free
5457 here. We don't do that because the waste is small,
5458 and will be cleaned up when we're done with this
5459 compilation unit. This way, we're also more robust
5460 against other users of the comp_unit_obstack. */
5463 info_ptr
+= bytes_read
;
5464 last_die
= parent_die
;
5465 parent_die
= parent_die
->die_parent
;
5469 /* Check whether this DIE is interesting enough to save. Normally
5470 we would not be interested in members here, but there may be
5471 later variables referencing them via DW_AT_specification (for
5474 && !is_type_tag_for_partial (abbrev
->tag
)
5475 && abbrev
->tag
!= DW_TAG_enumerator
5476 && abbrev
->tag
!= DW_TAG_subprogram
5477 && abbrev
->tag
!= DW_TAG_variable
5478 && abbrev
->tag
!= DW_TAG_namespace
5479 && abbrev
->tag
!= DW_TAG_member
)
5481 /* Otherwise we skip to the next sibling, if any. */
5482 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
5486 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
,
5487 abfd
, info_ptr
, cu
);
5489 /* This two-pass algorithm for processing partial symbols has a
5490 high cost in cache pressure. Thus, handle some simple cases
5491 here which cover the majority of C partial symbols. DIEs
5492 which neither have specification tags in them, nor could have
5493 specification tags elsewhere pointing at them, can simply be
5494 processed and discarded.
5496 This segment is also optional; scan_partial_symbols and
5497 add_partial_symbol will handle these DIEs if we chain
5498 them in normally. When compilers which do not emit large
5499 quantities of duplicate debug information are more common,
5500 this code can probably be removed. */
5502 /* Any complete simple types at the top level (pretty much all
5503 of them, for a language without namespaces), can be processed
5505 if (parent_die
== NULL
5506 && part_die
->has_specification
== 0
5507 && part_die
->is_declaration
== 0
5508 && (part_die
->tag
== DW_TAG_typedef
5509 || part_die
->tag
== DW_TAG_base_type
5510 || part_die
->tag
== DW_TAG_subrange_type
))
5512 if (building_psymtab
&& part_die
->name
!= NULL
)
5513 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5514 VAR_DOMAIN
, LOC_TYPEDEF
,
5515 &cu
->objfile
->static_psymbols
,
5516 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5517 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5521 /* If we're at the second level, and we're an enumerator, and
5522 our parent has no specification (meaning possibly lives in a
5523 namespace elsewhere), then we can add the partial symbol now
5524 instead of queueing it. */
5525 if (part_die
->tag
== DW_TAG_enumerator
5526 && parent_die
!= NULL
5527 && parent_die
->die_parent
== NULL
5528 && parent_die
->tag
== DW_TAG_enumeration_type
5529 && parent_die
->has_specification
== 0)
5531 if (part_die
->name
== NULL
)
5532 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
5533 else if (building_psymtab
)
5534 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5535 VAR_DOMAIN
, LOC_CONST
,
5536 (cu
->language
== language_cplus
5537 || cu
->language
== language_java
)
5538 ? &cu
->objfile
->global_psymbols
5539 : &cu
->objfile
->static_psymbols
,
5540 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5542 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5546 /* We'll save this DIE so link it in. */
5547 part_die
->die_parent
= parent_die
;
5548 part_die
->die_sibling
= NULL
;
5549 part_die
->die_child
= NULL
;
5551 if (last_die
&& last_die
== parent_die
)
5552 last_die
->die_child
= part_die
;
5554 last_die
->die_sibling
= part_die
;
5556 last_die
= part_die
;
5558 if (first_die
== NULL
)
5559 first_die
= part_die
;
5561 /* Maybe add the DIE to the hash table. Not all DIEs that we
5562 find interesting need to be in the hash table, because we
5563 also have the parent/sibling/child chains; only those that we
5564 might refer to by offset later during partial symbol reading.
5566 For now this means things that might have be the target of a
5567 DW_AT_specification, DW_AT_abstract_origin, or
5568 DW_AT_extension. DW_AT_extension will refer only to
5569 namespaces; DW_AT_abstract_origin refers to functions (and
5570 many things under the function DIE, but we do not recurse
5571 into function DIEs during partial symbol reading) and
5572 possibly variables as well; DW_AT_specification refers to
5573 declarations. Declarations ought to have the DW_AT_declaration
5574 flag. It happens that GCC forgets to put it in sometimes, but
5575 only for functions, not for types.
5577 Adding more things than necessary to the hash table is harmless
5578 except for the performance cost. Adding too few will result in
5579 wasted time in find_partial_die, when we reread the compilation
5580 unit with load_all_dies set. */
5583 || abbrev
->tag
== DW_TAG_subprogram
5584 || abbrev
->tag
== DW_TAG_variable
5585 || abbrev
->tag
== DW_TAG_namespace
5586 || part_die
->is_declaration
)
5590 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
5591 part_die
->offset
, INSERT
);
5595 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5596 sizeof (struct partial_die_info
));
5598 /* For some DIEs we want to follow their children (if any). For C
5599 we have no reason to follow the children of structures; for other
5600 languages we have to, both so that we can get at method physnames
5601 to infer fully qualified class names, and for DW_AT_specification. */
5602 if (last_die
->has_children
5604 || last_die
->tag
== DW_TAG_namespace
5605 || last_die
->tag
== DW_TAG_enumeration_type
5606 || (cu
->language
!= language_c
5607 && (last_die
->tag
== DW_TAG_class_type
5608 || last_die
->tag
== DW_TAG_structure_type
5609 || last_die
->tag
== DW_TAG_union_type
))))
5612 parent_die
= last_die
;
5616 /* Otherwise we skip to the next sibling, if any. */
5617 info_ptr
= locate_pdi_sibling (last_die
, info_ptr
, abfd
, cu
);
5619 /* Back to the top, do it again. */
5623 /* Read a minimal amount of information into the minimal die structure. */
5626 read_partial_die (struct partial_die_info
*part_die
,
5627 struct abbrev_info
*abbrev
,
5628 unsigned int abbrev_len
, bfd
*abfd
,
5629 gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
5631 unsigned int bytes_read
, i
;
5632 struct attribute attr
;
5633 int has_low_pc_attr
= 0;
5634 int has_high_pc_attr
= 0;
5636 memset (part_die
, 0, sizeof (struct partial_die_info
));
5638 part_die
->offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5640 info_ptr
+= abbrev_len
;
5645 part_die
->tag
= abbrev
->tag
;
5646 part_die
->has_children
= abbrev
->has_children
;
5648 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5650 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
5652 /* Store the data if it is of an attribute we want to keep in a
5653 partial symbol table. */
5658 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
5659 if (part_die
->name
== NULL
)
5660 part_die
->name
= DW_STRING (&attr
);
5662 case DW_AT_comp_dir
:
5663 if (part_die
->dirname
== NULL
)
5664 part_die
->dirname
= DW_STRING (&attr
);
5666 case DW_AT_MIPS_linkage_name
:
5667 part_die
->name
= DW_STRING (&attr
);
5670 has_low_pc_attr
= 1;
5671 part_die
->lowpc
= DW_ADDR (&attr
);
5674 has_high_pc_attr
= 1;
5675 part_die
->highpc
= DW_ADDR (&attr
);
5678 if (dwarf2_ranges_read (DW_UNSND (&attr
), &part_die
->lowpc
,
5679 &part_die
->highpc
, cu
))
5680 has_low_pc_attr
= has_high_pc_attr
= 1;
5682 case DW_AT_location
:
5683 /* Support the .debug_loc offsets */
5684 if (attr_form_is_block (&attr
))
5686 part_die
->locdesc
= DW_BLOCK (&attr
);
5688 else if (attr_form_is_section_offset (&attr
))
5690 dwarf2_complex_location_expr_complaint ();
5694 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5695 "partial symbol information");
5698 case DW_AT_language
:
5699 part_die
->language
= DW_UNSND (&attr
);
5701 case DW_AT_external
:
5702 part_die
->is_external
= DW_UNSND (&attr
);
5704 case DW_AT_declaration
:
5705 part_die
->is_declaration
= DW_UNSND (&attr
);
5708 part_die
->has_type
= 1;
5710 case DW_AT_abstract_origin
:
5711 case DW_AT_specification
:
5712 case DW_AT_extension
:
5713 part_die
->has_specification
= 1;
5714 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
, cu
);
5717 /* Ignore absolute siblings, they might point outside of
5718 the current compile unit. */
5719 if (attr
.form
== DW_FORM_ref_addr
)
5720 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
5722 part_die
->sibling
= dwarf2_per_objfile
->info_buffer
5723 + dwarf2_get_ref_die_offset (&attr
, cu
);
5725 case DW_AT_stmt_list
:
5726 part_die
->has_stmt_list
= 1;
5727 part_die
->line_offset
= DW_UNSND (&attr
);
5729 case DW_AT_byte_size
:
5730 part_die
->has_byte_size
= 1;
5732 case DW_AT_calling_convention
:
5733 /* DWARF doesn't provide a way to identify a program's source-level
5734 entry point. DW_AT_calling_convention attributes are only meant
5735 to describe functions' calling conventions.
5737 However, because it's a necessary piece of information in
5738 Fortran, and because DW_CC_program is the only piece of debugging
5739 information whose definition refers to a 'main program' at all,
5740 several compilers have begun marking Fortran main programs with
5741 DW_CC_program --- even when those functions use the standard
5742 calling conventions.
5744 So until DWARF specifies a way to provide this information and
5745 compilers pick up the new representation, we'll support this
5747 if (DW_UNSND (&attr
) == DW_CC_program
5748 && cu
->language
== language_fortran
)
5749 set_main_name (part_die
->name
);
5756 /* When using the GNU linker, .gnu.linkonce. sections are used to
5757 eliminate duplicate copies of functions and vtables and such.
5758 The linker will arbitrarily choose one and discard the others.
5759 The AT_*_pc values for such functions refer to local labels in
5760 these sections. If the section from that file was discarded, the
5761 labels are not in the output, so the relocs get a value of 0.
5762 If this is a discarded function, mark the pc bounds as invalid,
5763 so that GDB will ignore it. */
5764 if (has_low_pc_attr
&& has_high_pc_attr
5765 && part_die
->lowpc
< part_die
->highpc
5766 && (part_die
->lowpc
!= 0
5767 || dwarf2_per_objfile
->has_section_at_zero
))
5768 part_die
->has_pc_info
= 1;
5772 /* Find a cached partial DIE at OFFSET in CU. */
5774 static struct partial_die_info
*
5775 find_partial_die_in_comp_unit (unsigned long offset
, struct dwarf2_cu
*cu
)
5777 struct partial_die_info
*lookup_die
= NULL
;
5778 struct partial_die_info part_die
;
5780 part_die
.offset
= offset
;
5781 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
5786 /* Find a partial DIE at OFFSET, which may or may not be in CU. */
5788 static struct partial_die_info
*
5789 find_partial_die (unsigned long offset
, struct dwarf2_cu
*cu
)
5791 struct dwarf2_per_cu_data
*per_cu
= NULL
;
5792 struct partial_die_info
*pd
= NULL
;
5794 if (offset
>= cu
->header
.offset
5795 && offset
< cu
->header
.offset
+ cu
->header
.length
)
5797 pd
= find_partial_die_in_comp_unit (offset
, cu
);
5802 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
5804 if (per_cu
->cu
== NULL
)
5806 load_comp_unit (per_cu
, cu
->objfile
);
5807 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5808 dwarf2_per_objfile
->read_in_chain
= per_cu
;
5811 per_cu
->cu
->last_used
= 0;
5812 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5814 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
5816 struct cleanup
*back_to
;
5817 struct partial_die_info comp_unit_die
;
5818 struct abbrev_info
*abbrev
;
5819 unsigned int bytes_read
;
5822 per_cu
->load_all_dies
= 1;
5824 /* Re-read the DIEs. */
5825 back_to
= make_cleanup (null_cleanup
, 0);
5826 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
5828 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
5829 back_to
= make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
5831 info_ptr
= per_cu
->cu
->header
.first_die_ptr
;
5832 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
5833 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
5834 per_cu
->cu
->objfile
->obfd
, info_ptr
,
5836 if (comp_unit_die
.has_children
)
5837 load_partial_dies (per_cu
->cu
->objfile
->obfd
, info_ptr
, 0, per_cu
->cu
);
5838 do_cleanups (back_to
);
5840 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5844 internal_error (__FILE__
, __LINE__
,
5845 _("could not find partial DIE 0x%lx in cache [from module %s]\n"),
5846 offset
, bfd_get_filename (cu
->objfile
->obfd
));
5850 /* Adjust PART_DIE before generating a symbol for it. This function
5851 may set the is_external flag or change the DIE's name. */
5854 fixup_partial_die (struct partial_die_info
*part_die
,
5855 struct dwarf2_cu
*cu
)
5857 /* If we found a reference attribute and the DIE has no name, try
5858 to find a name in the referred to DIE. */
5860 if (part_die
->name
== NULL
&& part_die
->has_specification
)
5862 struct partial_die_info
*spec_die
;
5864 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
5866 fixup_partial_die (spec_die
, cu
);
5870 part_die
->name
= spec_die
->name
;
5872 /* Copy DW_AT_external attribute if it is set. */
5873 if (spec_die
->is_external
)
5874 part_die
->is_external
= spec_die
->is_external
;
5878 /* Set default names for some unnamed DIEs. */
5879 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
5880 || part_die
->tag
== DW_TAG_class_type
))
5881 part_die
->name
= "(anonymous class)";
5883 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
5884 part_die
->name
= "(anonymous namespace)";
5886 if (part_die
->tag
== DW_TAG_structure_type
5887 || part_die
->tag
== DW_TAG_class_type
5888 || part_die
->tag
== DW_TAG_union_type
)
5889 guess_structure_name (part_die
, cu
);
5892 /* Read the die from the .debug_info section buffer. Set DIEP to
5893 point to a newly allocated die with its information, except for its
5894 child, sibling, and parent fields. Set HAS_CHILDREN to tell
5895 whether the die has children or not. */
5898 read_full_die (struct die_info
**diep
, bfd
*abfd
, gdb_byte
*info_ptr
,
5899 struct dwarf2_cu
*cu
, int *has_children
)
5901 unsigned int abbrev_number
, bytes_read
, i
, offset
;
5902 struct abbrev_info
*abbrev
;
5903 struct die_info
*die
;
5905 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5906 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5907 info_ptr
+= bytes_read
;
5910 die
= dwarf_alloc_die ();
5912 die
->abbrev
= abbrev_number
;
5919 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
5922 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
5924 bfd_get_filename (abfd
));
5926 die
= dwarf_alloc_die ();
5927 die
->offset
= offset
;
5928 die
->tag
= abbrev
->tag
;
5929 die
->abbrev
= abbrev_number
;
5932 die
->num_attrs
= abbrev
->num_attrs
;
5933 die
->attrs
= (struct attribute
*)
5934 xmalloc (die
->num_attrs
* sizeof (struct attribute
));
5936 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5938 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
5939 abfd
, info_ptr
, cu
);
5941 /* If this attribute is an absolute reference to a different
5942 compilation unit, make sure that compilation unit is loaded
5944 if (die
->attrs
[i
].form
== DW_FORM_ref_addr
5945 && (DW_ADDR (&die
->attrs
[i
]) < cu
->header
.offset
5946 || (DW_ADDR (&die
->attrs
[i
])
5947 >= cu
->header
.offset
+ cu
->header
.length
)))
5949 struct dwarf2_per_cu_data
*per_cu
;
5950 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (&die
->attrs
[i
]),
5953 /* Mark the dependence relation so that we don't flush PER_CU
5955 dwarf2_add_dependence (cu
, per_cu
);
5957 /* If it's already on the queue, we have nothing to do. */
5961 /* If the compilation unit is already loaded, just mark it as
5963 if (per_cu
->cu
!= NULL
)
5965 per_cu
->cu
->last_used
= 0;
5969 /* Add it to the queue. */
5970 queue_comp_unit (per_cu
);
5975 *has_children
= abbrev
->has_children
;
5979 /* Read an attribute value described by an attribute form. */
5982 read_attribute_value (struct attribute
*attr
, unsigned form
,
5983 bfd
*abfd
, gdb_byte
*info_ptr
,
5984 struct dwarf2_cu
*cu
)
5986 struct comp_unit_head
*cu_header
= &cu
->header
;
5987 unsigned int bytes_read
;
5988 struct dwarf_block
*blk
;
5994 case DW_FORM_ref_addr
:
5995 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
5996 info_ptr
+= bytes_read
;
5998 case DW_FORM_block2
:
5999 blk
= dwarf_alloc_block (cu
);
6000 blk
->size
= read_2_bytes (abfd
, info_ptr
);
6002 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6003 info_ptr
+= blk
->size
;
6004 DW_BLOCK (attr
) = blk
;
6006 case DW_FORM_block4
:
6007 blk
= dwarf_alloc_block (cu
);
6008 blk
->size
= read_4_bytes (abfd
, info_ptr
);
6010 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6011 info_ptr
+= blk
->size
;
6012 DW_BLOCK (attr
) = blk
;
6015 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
6019 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
6023 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
6026 case DW_FORM_string
:
6027 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
6028 info_ptr
+= bytes_read
;
6031 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
6033 info_ptr
+= bytes_read
;
6036 blk
= dwarf_alloc_block (cu
);
6037 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6038 info_ptr
+= bytes_read
;
6039 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6040 info_ptr
+= blk
->size
;
6041 DW_BLOCK (attr
) = blk
;
6043 case DW_FORM_block1
:
6044 blk
= dwarf_alloc_block (cu
);
6045 blk
->size
= read_1_byte (abfd
, info_ptr
);
6047 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6048 info_ptr
+= blk
->size
;
6049 DW_BLOCK (attr
) = blk
;
6052 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
6056 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
6060 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
6061 info_ptr
+= bytes_read
;
6064 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6065 info_ptr
+= bytes_read
;
6068 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
6072 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
6076 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
6080 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
6083 case DW_FORM_ref_udata
:
6084 DW_ADDR (attr
) = (cu
->header
.offset
6085 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
6086 info_ptr
+= bytes_read
;
6088 case DW_FORM_indirect
:
6089 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6090 info_ptr
+= bytes_read
;
6091 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
6094 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
6095 dwarf_form_name (form
),
6096 bfd_get_filename (abfd
));
6101 /* Read an attribute described by an abbreviated attribute. */
6104 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
6105 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6107 attr
->name
= abbrev
->name
;
6108 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
6111 /* read dwarf information from a buffer */
6114 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
6116 return bfd_get_8 (abfd
, buf
);
6120 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
6122 return bfd_get_signed_8 (abfd
, buf
);
6126 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
6128 return bfd_get_16 (abfd
, buf
);
6132 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6134 return bfd_get_signed_16 (abfd
, buf
);
6138 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
6140 return bfd_get_32 (abfd
, buf
);
6144 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6146 return bfd_get_signed_32 (abfd
, buf
);
6149 static unsigned long
6150 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
6152 return bfd_get_64 (abfd
, buf
);
6156 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
6157 unsigned int *bytes_read
)
6159 struct comp_unit_head
*cu_header
= &cu
->header
;
6160 CORE_ADDR retval
= 0;
6162 if (cu_header
->signed_addr_p
)
6164 switch (cu_header
->addr_size
)
6167 retval
= bfd_get_signed_16 (abfd
, buf
);
6170 retval
= bfd_get_signed_32 (abfd
, buf
);
6173 retval
= bfd_get_signed_64 (abfd
, buf
);
6176 internal_error (__FILE__
, __LINE__
,
6177 _("read_address: bad switch, signed [in module %s]"),
6178 bfd_get_filename (abfd
));
6183 switch (cu_header
->addr_size
)
6186 retval
= bfd_get_16 (abfd
, buf
);
6189 retval
= bfd_get_32 (abfd
, buf
);
6192 retval
= bfd_get_64 (abfd
, buf
);
6195 internal_error (__FILE__
, __LINE__
,
6196 _("read_address: bad switch, unsigned [in module %s]"),
6197 bfd_get_filename (abfd
));
6201 *bytes_read
= cu_header
->addr_size
;
6205 /* Read the initial length from a section. The (draft) DWARF 3
6206 specification allows the initial length to take up either 4 bytes
6207 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
6208 bytes describe the length and all offsets will be 8 bytes in length
6211 An older, non-standard 64-bit format is also handled by this
6212 function. The older format in question stores the initial length
6213 as an 8-byte quantity without an escape value. Lengths greater
6214 than 2^32 aren't very common which means that the initial 4 bytes
6215 is almost always zero. Since a length value of zero doesn't make
6216 sense for the 32-bit format, this initial zero can be considered to
6217 be an escape value which indicates the presence of the older 64-bit
6218 format. As written, the code can't detect (old format) lengths
6219 greater than 4GB. If it becomes necessary to handle lengths
6220 somewhat larger than 4GB, we could allow other small values (such
6221 as the non-sensical values of 1, 2, and 3) to also be used as
6222 escape values indicating the presence of the old format.
6224 The value returned via bytes_read should be used to increment the
6225 relevant pointer after calling read_initial_length().
6227 As a side effect, this function sets the fields initial_length_size
6228 and offset_size in cu_header to the values appropriate for the
6229 length field. (The format of the initial length field determines
6230 the width of file offsets to be fetched later with read_offset().)
6232 [ Note: read_initial_length() and read_offset() are based on the
6233 document entitled "DWARF Debugging Information Format", revision
6234 3, draft 8, dated November 19, 2001. This document was obtained
6237 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
6239 This document is only a draft and is subject to change. (So beware.)
6241 Details regarding the older, non-standard 64-bit format were
6242 determined empirically by examining 64-bit ELF files produced by
6243 the SGI toolchain on an IRIX 6.5 machine.
6245 - Kevin, July 16, 2002
6249 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, struct comp_unit_head
*cu_header
,
6250 unsigned int *bytes_read
)
6252 LONGEST length
= bfd_get_32 (abfd
, buf
);
6254 if (length
== 0xffffffff)
6256 length
= bfd_get_64 (abfd
, buf
+ 4);
6259 else if (length
== 0)
6261 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
6262 length
= bfd_get_64 (abfd
, buf
);
6272 gdb_assert (cu_header
->initial_length_size
== 0
6273 || cu_header
->initial_length_size
== 4
6274 || cu_header
->initial_length_size
== 8
6275 || cu_header
->initial_length_size
== 12);
6277 if (cu_header
->initial_length_size
!= 0
6278 && cu_header
->initial_length_size
!= *bytes_read
)
6279 complaint (&symfile_complaints
,
6280 _("intermixed 32-bit and 64-bit DWARF sections"));
6282 cu_header
->initial_length_size
= *bytes_read
;
6283 cu_header
->offset_size
= (*bytes_read
== 4) ? 4 : 8;
6289 /* Read an offset from the data stream. The size of the offset is
6290 given by cu_header->offset_size. */
6293 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
6294 unsigned int *bytes_read
)
6298 switch (cu_header
->offset_size
)
6301 retval
= bfd_get_32 (abfd
, buf
);
6305 retval
= bfd_get_64 (abfd
, buf
);
6309 internal_error (__FILE__
, __LINE__
,
6310 _("read_offset: bad switch [in module %s]"),
6311 bfd_get_filename (abfd
));
6318 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
6320 /* If the size of a host char is 8 bits, we can return a pointer
6321 to the buffer, otherwise we have to copy the data to a buffer
6322 allocated on the temporary obstack. */
6323 gdb_assert (HOST_CHAR_BIT
== 8);
6328 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6330 /* If the size of a host char is 8 bits, we can return a pointer
6331 to the string, otherwise we have to copy the string to a buffer
6332 allocated on the temporary obstack. */
6333 gdb_assert (HOST_CHAR_BIT
== 8);
6336 *bytes_read_ptr
= 1;
6339 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
6340 return (char *) buf
;
6344 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
6345 const struct comp_unit_head
*cu_header
,
6346 unsigned int *bytes_read_ptr
)
6348 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
,
6351 if (dwarf2_per_objfile
->str_buffer
== NULL
)
6353 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
6354 bfd_get_filename (abfd
));
6357 if (str_offset
>= dwarf2_per_objfile
->str_size
)
6359 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
6360 bfd_get_filename (abfd
));
6363 gdb_assert (HOST_CHAR_BIT
== 8);
6364 if (dwarf2_per_objfile
->str_buffer
[str_offset
] == '\0')
6366 return (char *) (dwarf2_per_objfile
->str_buffer
+ str_offset
);
6369 static unsigned long
6370 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6372 unsigned long result
;
6373 unsigned int num_read
;
6383 byte
= bfd_get_8 (abfd
, buf
);
6386 result
|= ((unsigned long)(byte
& 127) << shift
);
6387 if ((byte
& 128) == 0)
6393 *bytes_read_ptr
= num_read
;
6398 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6401 int i
, shift
, num_read
;
6410 byte
= bfd_get_8 (abfd
, buf
);
6413 result
|= ((long)(byte
& 127) << shift
);
6415 if ((byte
& 128) == 0)
6420 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
6421 result
|= -(((long)1) << shift
);
6422 *bytes_read_ptr
= num_read
;
6426 /* Return a pointer to just past the end of an LEB128 number in BUF. */
6429 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
6435 byte
= bfd_get_8 (abfd
, buf
);
6437 if ((byte
& 128) == 0)
6443 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
6449 cu
->language
= language_c
;
6451 case DW_LANG_C_plus_plus
:
6452 cu
->language
= language_cplus
;
6454 case DW_LANG_Fortran77
:
6455 case DW_LANG_Fortran90
:
6456 case DW_LANG_Fortran95
:
6457 cu
->language
= language_fortran
;
6459 case DW_LANG_Mips_Assembler
:
6460 cu
->language
= language_asm
;
6463 cu
->language
= language_java
;
6467 cu
->language
= language_ada
;
6469 case DW_LANG_Modula2
:
6470 cu
->language
= language_m2
;
6472 case DW_LANG_Pascal83
:
6473 cu
->language
= language_pascal
;
6475 case DW_LANG_Cobol74
:
6476 case DW_LANG_Cobol85
:
6478 cu
->language
= language_minimal
;
6481 cu
->language_defn
= language_def (cu
->language
);
6484 /* Return the named attribute or NULL if not there. */
6486 static struct attribute
*
6487 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
6490 struct attribute
*spec
= NULL
;
6492 for (i
= 0; i
< die
->num_attrs
; ++i
)
6494 if (die
->attrs
[i
].name
== name
)
6495 return &die
->attrs
[i
];
6496 if (die
->attrs
[i
].name
== DW_AT_specification
6497 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
6498 spec
= &die
->attrs
[i
];
6502 return dwarf2_attr (follow_die_ref (die
, spec
, cu
), name
, cu
);
6507 /* Return non-zero iff the attribute NAME is defined for the given DIE,
6508 and holds a non-zero value. This function should only be used for
6509 DW_FORM_flag attributes. */
6512 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
6514 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
6516 return (attr
&& DW_UNSND (attr
));
6520 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
6522 /* A DIE is a declaration if it has a DW_AT_declaration attribute
6523 which value is non-zero. However, we have to be careful with
6524 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
6525 (via dwarf2_flag_true_p) follows this attribute. So we may
6526 end up accidently finding a declaration attribute that belongs
6527 to a different DIE referenced by the specification attribute,
6528 even though the given DIE does not have a declaration attribute. */
6529 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
6530 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
6533 /* Return the die giving the specification for DIE, if there is
6536 static struct die_info
*
6537 die_specification (struct die_info
*die
, struct dwarf2_cu
*cu
)
6539 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
, cu
);
6541 if (spec_attr
== NULL
)
6544 return follow_die_ref (die
, spec_attr
, cu
);
6547 /* Free the line_header structure *LH, and any arrays and strings it
6550 free_line_header (struct line_header
*lh
)
6552 if (lh
->standard_opcode_lengths
)
6553 xfree (lh
->standard_opcode_lengths
);
6555 /* Remember that all the lh->file_names[i].name pointers are
6556 pointers into debug_line_buffer, and don't need to be freed. */
6558 xfree (lh
->file_names
);
6560 /* Similarly for the include directory names. */
6561 if (lh
->include_dirs
)
6562 xfree (lh
->include_dirs
);
6568 /* Add an entry to LH's include directory table. */
6570 add_include_dir (struct line_header
*lh
, char *include_dir
)
6572 /* Grow the array if necessary. */
6573 if (lh
->include_dirs_size
== 0)
6575 lh
->include_dirs_size
= 1; /* for testing */
6576 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
6577 * sizeof (*lh
->include_dirs
));
6579 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
6581 lh
->include_dirs_size
*= 2;
6582 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
6583 (lh
->include_dirs_size
6584 * sizeof (*lh
->include_dirs
)));
6587 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
6591 /* Add an entry to LH's file name table. */
6593 add_file_name (struct line_header
*lh
,
6595 unsigned int dir_index
,
6596 unsigned int mod_time
,
6597 unsigned int length
)
6599 struct file_entry
*fe
;
6601 /* Grow the array if necessary. */
6602 if (lh
->file_names_size
== 0)
6604 lh
->file_names_size
= 1; /* for testing */
6605 lh
->file_names
= xmalloc (lh
->file_names_size
6606 * sizeof (*lh
->file_names
));
6608 else if (lh
->num_file_names
>= lh
->file_names_size
)
6610 lh
->file_names_size
*= 2;
6611 lh
->file_names
= xrealloc (lh
->file_names
,
6612 (lh
->file_names_size
6613 * sizeof (*lh
->file_names
)));
6616 fe
= &lh
->file_names
[lh
->num_file_names
++];
6618 fe
->dir_index
= dir_index
;
6619 fe
->mod_time
= mod_time
;
6620 fe
->length
= length
;
6626 /* Read the statement program header starting at OFFSET in
6627 .debug_line, according to the endianness of ABFD. Return a pointer
6628 to a struct line_header, allocated using xmalloc.
6630 NOTE: the strings in the include directory and file name tables of
6631 the returned object point into debug_line_buffer, and must not be
6633 static struct line_header
*
6634 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
6635 struct dwarf2_cu
*cu
)
6637 struct cleanup
*back_to
;
6638 struct line_header
*lh
;
6640 unsigned int bytes_read
;
6642 char *cur_dir
, *cur_file
;
6644 if (dwarf2_per_objfile
->line_buffer
== NULL
)
6646 complaint (&symfile_complaints
, _("missing .debug_line section"));
6650 /* Make sure that at least there's room for the total_length field.
6651 That could be 12 bytes long, but we're just going to fudge that. */
6652 if (offset
+ 4 >= dwarf2_per_objfile
->line_size
)
6654 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6658 lh
= xmalloc (sizeof (*lh
));
6659 memset (lh
, 0, sizeof (*lh
));
6660 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
6663 line_ptr
= dwarf2_per_objfile
->line_buffer
+ offset
;
6665 /* Read in the header. */
6667 read_initial_length (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6668 line_ptr
+= bytes_read
;
6669 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line_buffer
6670 + dwarf2_per_objfile
->line_size
))
6672 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6675 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
6676 lh
->version
= read_2_bytes (abfd
, line_ptr
);
6678 lh
->header_length
= read_offset (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6679 line_ptr
+= bytes_read
;
6680 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
6682 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
6684 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
6686 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
6688 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
6690 lh
->standard_opcode_lengths
6691 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
6693 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
6694 for (i
= 1; i
< lh
->opcode_base
; ++i
)
6696 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
6700 /* Read directory table. */
6701 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6703 line_ptr
+= bytes_read
;
6704 add_include_dir (lh
, cur_dir
);
6706 line_ptr
+= bytes_read
;
6708 /* Read file name table. */
6709 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6711 unsigned int dir_index
, mod_time
, length
;
6713 line_ptr
+= bytes_read
;
6714 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6715 line_ptr
+= bytes_read
;
6716 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6717 line_ptr
+= bytes_read
;
6718 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6719 line_ptr
+= bytes_read
;
6721 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6723 line_ptr
+= bytes_read
;
6724 lh
->statement_program_start
= line_ptr
;
6726 if (line_ptr
> (dwarf2_per_objfile
->line_buffer
6727 + dwarf2_per_objfile
->line_size
))
6728 complaint (&symfile_complaints
,
6729 _("line number info header doesn't fit in `.debug_line' section"));
6731 discard_cleanups (back_to
);
6735 /* This function exists to work around a bug in certain compilers
6736 (particularly GCC 2.95), in which the first line number marker of a
6737 function does not show up until after the prologue, right before
6738 the second line number marker. This function shifts ADDRESS down
6739 to the beginning of the function if necessary, and is called on
6740 addresses passed to record_line. */
6743 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
6745 struct function_range
*fn
;
6747 /* Find the function_range containing address. */
6752 cu
->cached_fn
= cu
->first_fn
;
6756 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6762 while (fn
&& fn
!= cu
->cached_fn
)
6763 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6773 if (address
!= fn
->lowpc
)
6774 complaint (&symfile_complaints
,
6775 _("misplaced first line number at 0x%lx for '%s'"),
6776 (unsigned long) address
, fn
->name
);
6781 /* Decode the Line Number Program (LNP) for the given line_header
6782 structure and CU. The actual information extracted and the type
6783 of structures created from the LNP depends on the value of PST.
6785 1. If PST is NULL, then this procedure uses the data from the program
6786 to create all necessary symbol tables, and their linetables.
6787 The compilation directory of the file is passed in COMP_DIR,
6788 and must not be NULL.
6790 2. If PST is not NULL, this procedure reads the program to determine
6791 the list of files included by the unit represented by PST, and
6792 builds all the associated partial symbol tables. In this case,
6793 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
6794 is not used to compute the full name of the symtab, and therefore
6795 omitting it when building the partial symtab does not introduce
6796 the potential for inconsistency - a partial symtab and its associated
6797 symbtab having a different fullname -). */
6800 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
6801 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
6803 gdb_byte
*line_ptr
, *extended_end
;
6805 unsigned int bytes_read
, extended_len
;
6806 unsigned char op_code
, extended_op
, adj_opcode
;
6808 struct objfile
*objfile
= cu
->objfile
;
6809 const int decode_for_pst_p
= (pst
!= NULL
);
6810 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
6812 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6814 line_ptr
= lh
->statement_program_start
;
6815 line_end
= lh
->statement_program_end
;
6817 /* Read the statement sequences until there's nothing left. */
6818 while (line_ptr
< line_end
)
6820 /* state machine registers */
6821 CORE_ADDR address
= 0;
6822 unsigned int file
= 1;
6823 unsigned int line
= 1;
6824 unsigned int column
= 0;
6825 int is_stmt
= lh
->default_is_stmt
;
6826 int basic_block
= 0;
6827 int end_sequence
= 0;
6829 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
6831 /* Start a subfile for the current file of the state machine. */
6832 /* lh->include_dirs and lh->file_names are 0-based, but the
6833 directory and file name numbers in the statement program
6835 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
6839 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6841 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6844 /* Decode the table. */
6845 while (!end_sequence
)
6847 op_code
= read_1_byte (abfd
, line_ptr
);
6850 if (op_code
>= lh
->opcode_base
)
6852 /* Special operand. */
6853 adj_opcode
= op_code
- lh
->opcode_base
;
6854 address
+= (adj_opcode
/ lh
->line_range
)
6855 * lh
->minimum_instruction_length
;
6856 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
6857 if (lh
->num_file_names
< file
)
6858 dwarf2_debug_line_missing_file_complaint ();
6861 lh
->file_names
[file
- 1].included_p
= 1;
6862 if (!decode_for_pst_p
)
6864 if (last_subfile
!= current_subfile
)
6867 record_line (last_subfile
, 0, address
);
6868 last_subfile
= current_subfile
;
6870 /* Append row to matrix using current values. */
6871 record_line (current_subfile
, line
,
6872 check_cu_functions (address
, cu
));
6877 else switch (op_code
)
6879 case DW_LNS_extended_op
:
6880 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6881 line_ptr
+= bytes_read
;
6882 extended_end
= line_ptr
+ extended_len
;
6883 extended_op
= read_1_byte (abfd
, line_ptr
);
6885 switch (extended_op
)
6887 case DW_LNE_end_sequence
:
6890 if (lh
->num_file_names
< file
)
6891 dwarf2_debug_line_missing_file_complaint ();
6894 lh
->file_names
[file
- 1].included_p
= 1;
6895 if (!decode_for_pst_p
)
6896 record_line (current_subfile
, 0, address
);
6899 case DW_LNE_set_address
:
6900 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
6901 line_ptr
+= bytes_read
;
6902 address
+= baseaddr
;
6904 case DW_LNE_define_file
:
6907 unsigned int dir_index
, mod_time
, length
;
6909 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
6910 line_ptr
+= bytes_read
;
6912 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6913 line_ptr
+= bytes_read
;
6915 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6916 line_ptr
+= bytes_read
;
6918 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6919 line_ptr
+= bytes_read
;
6920 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6924 complaint (&symfile_complaints
,
6925 _("mangled .debug_line section"));
6928 /* Make sure that we parsed the extended op correctly. If e.g.
6929 we expected a different address size than the producer used,
6930 we may have read the wrong number of bytes. */
6931 if (line_ptr
!= extended_end
)
6933 complaint (&symfile_complaints
,
6934 _("mangled .debug_line section"));
6939 if (lh
->num_file_names
< file
)
6940 dwarf2_debug_line_missing_file_complaint ();
6943 lh
->file_names
[file
- 1].included_p
= 1;
6944 if (!decode_for_pst_p
)
6946 if (last_subfile
!= current_subfile
)
6949 record_line (last_subfile
, 0, address
);
6950 last_subfile
= current_subfile
;
6952 record_line (current_subfile
, line
,
6953 check_cu_functions (address
, cu
));
6958 case DW_LNS_advance_pc
:
6959 address
+= lh
->minimum_instruction_length
6960 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6961 line_ptr
+= bytes_read
;
6963 case DW_LNS_advance_line
:
6964 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
6965 line_ptr
+= bytes_read
;
6967 case DW_LNS_set_file
:
6969 /* The arrays lh->include_dirs and lh->file_names are
6970 0-based, but the directory and file name numbers in
6971 the statement program are 1-based. */
6972 struct file_entry
*fe
;
6975 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6976 line_ptr
+= bytes_read
;
6977 if (lh
->num_file_names
< file
)
6978 dwarf2_debug_line_missing_file_complaint ();
6981 fe
= &lh
->file_names
[file
- 1];
6983 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6984 if (!decode_for_pst_p
)
6986 last_subfile
= current_subfile
;
6987 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6992 case DW_LNS_set_column
:
6993 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6994 line_ptr
+= bytes_read
;
6996 case DW_LNS_negate_stmt
:
6997 is_stmt
= (!is_stmt
);
6999 case DW_LNS_set_basic_block
:
7002 /* Add to the address register of the state machine the
7003 address increment value corresponding to special opcode
7004 255. I.e., this value is scaled by the minimum
7005 instruction length since special opcode 255 would have
7006 scaled the the increment. */
7007 case DW_LNS_const_add_pc
:
7008 address
+= (lh
->minimum_instruction_length
7009 * ((255 - lh
->opcode_base
) / lh
->line_range
));
7011 case DW_LNS_fixed_advance_pc
:
7012 address
+= read_2_bytes (abfd
, line_ptr
);
7017 /* Unknown standard opcode, ignore it. */
7020 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
7022 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7023 line_ptr
+= bytes_read
;
7030 if (decode_for_pst_p
)
7034 /* Now that we're done scanning the Line Header Program, we can
7035 create the psymtab of each included file. */
7036 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
7037 if (lh
->file_names
[file_index
].included_p
== 1)
7039 const struct file_entry fe
= lh
->file_names
[file_index
];
7040 char *include_name
= fe
.name
;
7041 char *dir_name
= NULL
;
7042 char *pst_filename
= pst
->filename
;
7045 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
7047 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
7049 include_name
= concat (dir_name
, SLASH_STRING
,
7050 include_name
, (char *)NULL
);
7051 make_cleanup (xfree
, include_name
);
7054 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
7056 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
7057 pst_filename
, (char *)NULL
);
7058 make_cleanup (xfree
, pst_filename
);
7061 if (strcmp (include_name
, pst_filename
) != 0)
7062 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
7067 /* Make sure a symtab is created for every file, even files
7068 which contain only variables (i.e. no code with associated
7072 struct file_entry
*fe
;
7074 for (i
= 0; i
< lh
->num_file_names
; i
++)
7077 fe
= &lh
->file_names
[i
];
7079 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7080 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7082 /* Skip the main file; we don't need it, and it must be
7083 allocated last, so that it will show up before the
7084 non-primary symtabs in the objfile's symtab list. */
7085 if (current_subfile
== first_subfile
)
7088 if (current_subfile
->symtab
== NULL
)
7089 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
7091 fe
->symtab
= current_subfile
->symtab
;
7096 /* Start a subfile for DWARF. FILENAME is the name of the file and
7097 DIRNAME the name of the source directory which contains FILENAME
7098 or NULL if not known. COMP_DIR is the compilation directory for the
7099 linetable's compilation unit or NULL if not known.
7100 This routine tries to keep line numbers from identical absolute and
7101 relative file names in a common subfile.
7103 Using the `list' example from the GDB testsuite, which resides in
7104 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
7105 of /srcdir/list0.c yields the following debugging information for list0.c:
7107 DW_AT_name: /srcdir/list0.c
7108 DW_AT_comp_dir: /compdir
7109 files.files[0].name: list0.h
7110 files.files[0].dir: /srcdir
7111 files.files[1].name: list0.c
7112 files.files[1].dir: /srcdir
7114 The line number information for list0.c has to end up in a single
7115 subfile, so that `break /srcdir/list0.c:1' works as expected.
7116 start_subfile will ensure that this happens provided that we pass the
7117 concatenation of files.files[1].dir and files.files[1].name as the
7121 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
7125 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
7126 `start_symtab' will always pass the contents of DW_AT_comp_dir as
7127 second argument to start_subfile. To be consistent, we do the
7128 same here. In order not to lose the line information directory,
7129 we concatenate it to the filename when it makes sense.
7130 Note that the Dwarf3 standard says (speaking of filenames in line
7131 information): ``The directory index is ignored for file names
7132 that represent full path names''. Thus ignoring dirname in the
7133 `else' branch below isn't an issue. */
7135 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
7136 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
7138 fullname
= filename
;
7140 start_subfile (fullname
, comp_dir
);
7142 if (fullname
!= filename
)
7147 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
7148 struct dwarf2_cu
*cu
)
7150 struct objfile
*objfile
= cu
->objfile
;
7151 struct comp_unit_head
*cu_header
= &cu
->header
;
7153 /* NOTE drow/2003-01-30: There used to be a comment and some special
7154 code here to turn a symbol with DW_AT_external and a
7155 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
7156 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
7157 with some versions of binutils) where shared libraries could have
7158 relocations against symbols in their debug information - the
7159 minimal symbol would have the right address, but the debug info
7160 would not. It's no longer necessary, because we will explicitly
7161 apply relocations when we read in the debug information now. */
7163 /* A DW_AT_location attribute with no contents indicates that a
7164 variable has been optimized away. */
7165 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
7167 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7171 /* Handle one degenerate form of location expression specially, to
7172 preserve GDB's previous behavior when section offsets are
7173 specified. If this is just a DW_OP_addr then mark this symbol
7176 if (attr_form_is_block (attr
)
7177 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
7178 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
7182 SYMBOL_VALUE_ADDRESS (sym
) =
7183 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
7184 fixup_symbol_section (sym
, objfile
);
7185 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
7186 SYMBOL_SECTION (sym
));
7187 SYMBOL_CLASS (sym
) = LOC_STATIC
;
7191 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
7192 expression evaluator, and use LOC_COMPUTED only when necessary
7193 (i.e. when the value of a register or memory location is
7194 referenced, or a thread-local block, etc.). Then again, it might
7195 not be worthwhile. I'm assuming that it isn't unless performance
7196 or memory numbers show me otherwise. */
7198 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
7199 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
7202 /* Given a pointer to a DWARF information entry, figure out if we need
7203 to make a symbol table entry for it, and if so, create a new entry
7204 and return a pointer to it.
7205 If TYPE is NULL, determine symbol type from the die, otherwise
7206 used the passed type. */
7208 static struct symbol
*
7209 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
7211 struct objfile
*objfile
= cu
->objfile
;
7212 struct symbol
*sym
= NULL
;
7214 struct attribute
*attr
= NULL
;
7215 struct attribute
*attr2
= NULL
;
7218 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7220 if (die
->tag
!= DW_TAG_namespace
)
7221 name
= dwarf2_linkage_name (die
, cu
);
7223 name
= TYPE_NAME (type
);
7227 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
7228 sizeof (struct symbol
));
7229 OBJSTAT (objfile
, n_syms
++);
7230 memset (sym
, 0, sizeof (struct symbol
));
7232 /* Cache this symbol's name and the name's demangled form (if any). */
7233 SYMBOL_LANGUAGE (sym
) = cu
->language
;
7234 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
7236 /* Default assumptions.
7237 Use the passed type or decode it from the die. */
7238 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7239 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7241 SYMBOL_TYPE (sym
) = type
;
7243 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
7244 attr
= dwarf2_attr (die
, DW_AT_decl_line
, cu
);
7247 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
7250 attr
= dwarf2_attr (die
, DW_AT_decl_file
, cu
);
7253 int file_index
= DW_UNSND (attr
);
7254 if (cu
->line_header
== NULL
7255 || file_index
> cu
->line_header
->num_file_names
)
7256 complaint (&symfile_complaints
,
7257 _("file index out of range"));
7258 else if (file_index
> 0)
7260 struct file_entry
*fe
;
7261 fe
= &cu
->line_header
->file_names
[file_index
- 1];
7262 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
7269 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
7272 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
7274 SYMBOL_CLASS (sym
) = LOC_LABEL
;
7276 case DW_TAG_subprogram
:
7277 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
7279 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
7280 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7281 if (attr2
&& (DW_UNSND (attr2
) != 0))
7283 add_symbol_to_list (sym
, &global_symbols
);
7287 add_symbol_to_list (sym
, cu
->list_in_scope
);
7290 case DW_TAG_variable
:
7291 /* Compilation with minimal debug info may result in variables
7292 with missing type entries. Change the misleading `void' type
7293 to something sensible. */
7294 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
7296 = builtin_type (current_gdbarch
)->nodebug_data_symbol
;
7298 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7301 dwarf2_const_value (attr
, sym
, cu
);
7302 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7303 if (attr2
&& (DW_UNSND (attr2
) != 0))
7304 add_symbol_to_list (sym
, &global_symbols
);
7306 add_symbol_to_list (sym
, cu
->list_in_scope
);
7309 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7312 var_decode_location (attr
, sym
, cu
);
7313 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7314 if (attr2
&& (DW_UNSND (attr2
) != 0))
7315 add_symbol_to_list (sym
, &global_symbols
);
7317 add_symbol_to_list (sym
, cu
->list_in_scope
);
7321 /* We do not know the address of this symbol.
7322 If it is an external symbol and we have type information
7323 for it, enter the symbol as a LOC_UNRESOLVED symbol.
7324 The address of the variable will then be determined from
7325 the minimal symbol table whenever the variable is
7327 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7328 if (attr2
&& (DW_UNSND (attr2
) != 0)
7329 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
7331 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
7332 add_symbol_to_list (sym
, &global_symbols
);
7336 case DW_TAG_formal_parameter
:
7337 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7340 var_decode_location (attr
, sym
, cu
);
7341 /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
7342 if (SYMBOL_CLASS (sym
) == LOC_COMPUTED
)
7343 SYMBOL_CLASS (sym
) = LOC_COMPUTED_ARG
;
7345 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7348 dwarf2_const_value (attr
, sym
, cu
);
7350 add_symbol_to_list (sym
, cu
->list_in_scope
);
7352 case DW_TAG_unspecified_parameters
:
7353 /* From varargs functions; gdb doesn't seem to have any
7354 interest in this information, so just ignore it for now.
7357 case DW_TAG_class_type
:
7358 case DW_TAG_structure_type
:
7359 case DW_TAG_union_type
:
7360 case DW_TAG_set_type
:
7361 case DW_TAG_enumeration_type
:
7362 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7363 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7365 /* Make sure that the symbol includes appropriate enclosing
7366 classes/namespaces in its name. These are calculated in
7367 read_structure_type, and the correct name is saved in
7370 if (cu
->language
== language_cplus
7371 || cu
->language
== language_java
)
7373 struct type
*type
= SYMBOL_TYPE (sym
);
7375 if (TYPE_TAG_NAME (type
) != NULL
)
7377 /* FIXME: carlton/2003-11-10: Should this use
7378 SYMBOL_SET_NAMES instead? (The same problem also
7379 arises further down in this function.) */
7380 /* The type's name is already allocated along with
7381 this objfile, so we don't need to duplicate it
7383 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
7388 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
7389 really ever be static objects: otherwise, if you try
7390 to, say, break of a class's method and you're in a file
7391 which doesn't mention that class, it won't work unless
7392 the check for all static symbols in lookup_symbol_aux
7393 saves you. See the OtherFileClass tests in
7394 gdb.c++/namespace.exp. */
7396 struct pending
**list_to_add
;
7398 list_to_add
= (cu
->list_in_scope
== &file_symbols
7399 && (cu
->language
== language_cplus
7400 || cu
->language
== language_java
)
7401 ? &global_symbols
: cu
->list_in_scope
);
7403 add_symbol_to_list (sym
, list_to_add
);
7405 /* The semantics of C++ state that "struct foo { ... }" also
7406 defines a typedef for "foo". A Java class declaration also
7407 defines a typedef for the class. Synthesize a typedef symbol
7408 so that "ptype foo" works as expected. */
7409 if (cu
->language
== language_cplus
7410 || cu
->language
== language_java
7411 || cu
->language
== language_ada
)
7413 struct symbol
*typedef_sym
= (struct symbol
*)
7414 obstack_alloc (&objfile
->objfile_obstack
,
7415 sizeof (struct symbol
));
7416 *typedef_sym
= *sym
;
7417 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
7418 /* The symbol's name is already allocated along with
7419 this objfile, so we don't need to duplicate it for
7421 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
7422 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
7423 add_symbol_to_list (typedef_sym
, list_to_add
);
7427 case DW_TAG_typedef
:
7428 if (processing_has_namespace_info
7429 && processing_current_prefix
[0] != '\0')
7431 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7432 processing_current_prefix
,
7435 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7436 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7437 add_symbol_to_list (sym
, cu
->list_in_scope
);
7439 case DW_TAG_base_type
:
7440 case DW_TAG_subrange_type
:
7441 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7442 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7443 add_symbol_to_list (sym
, cu
->list_in_scope
);
7445 case DW_TAG_enumerator
:
7446 if (processing_has_namespace_info
7447 && processing_current_prefix
[0] != '\0')
7449 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7450 processing_current_prefix
,
7453 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7456 dwarf2_const_value (attr
, sym
, cu
);
7459 /* NOTE: carlton/2003-11-10: See comment above in the
7460 DW_TAG_class_type, etc. block. */
7462 struct pending
**list_to_add
;
7464 list_to_add
= (cu
->list_in_scope
== &file_symbols
7465 && (cu
->language
== language_cplus
7466 || cu
->language
== language_java
)
7467 ? &global_symbols
: cu
->list_in_scope
);
7469 add_symbol_to_list (sym
, list_to_add
);
7472 case DW_TAG_namespace
:
7473 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7474 add_symbol_to_list (sym
, &global_symbols
);
7477 /* Not a tag we recognize. Hopefully we aren't processing
7478 trash data, but since we must specifically ignore things
7479 we don't recognize, there is nothing else we should do at
7481 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
7482 dwarf_tag_name (die
->tag
));
7489 /* Copy constant value from an attribute to a symbol. */
7492 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
7493 struct dwarf2_cu
*cu
)
7495 struct objfile
*objfile
= cu
->objfile
;
7496 struct comp_unit_head
*cu_header
= &cu
->header
;
7497 struct dwarf_block
*blk
;
7502 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
7503 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7504 cu_header
->addr_size
,
7505 TYPE_LENGTH (SYMBOL_TYPE
7507 SYMBOL_VALUE_BYTES (sym
) =
7508 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
7509 /* NOTE: cagney/2003-05-09: In-lined store_address call with
7510 it's body - store_unsigned_integer. */
7511 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
7513 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7515 case DW_FORM_block1
:
7516 case DW_FORM_block2
:
7517 case DW_FORM_block4
:
7519 blk
= DW_BLOCK (attr
);
7520 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
7521 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7523 TYPE_LENGTH (SYMBOL_TYPE
7525 SYMBOL_VALUE_BYTES (sym
) =
7526 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
7527 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
7528 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7531 /* The DW_AT_const_value attributes are supposed to carry the
7532 symbol's value "represented as it would be on the target
7533 architecture." By the time we get here, it's already been
7534 converted to host endianness, so we just need to sign- or
7535 zero-extend it as appropriate. */
7537 dwarf2_const_value_data (attr
, sym
, 8);
7540 dwarf2_const_value_data (attr
, sym
, 16);
7543 dwarf2_const_value_data (attr
, sym
, 32);
7546 dwarf2_const_value_data (attr
, sym
, 64);
7550 SYMBOL_VALUE (sym
) = DW_SND (attr
);
7551 SYMBOL_CLASS (sym
) = LOC_CONST
;
7555 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
7556 SYMBOL_CLASS (sym
) = LOC_CONST
;
7560 complaint (&symfile_complaints
,
7561 _("unsupported const value attribute form: '%s'"),
7562 dwarf_form_name (attr
->form
));
7563 SYMBOL_VALUE (sym
) = 0;
7564 SYMBOL_CLASS (sym
) = LOC_CONST
;
7570 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
7571 or zero-extend it as appropriate for the symbol's type. */
7573 dwarf2_const_value_data (struct attribute
*attr
,
7577 LONGEST l
= DW_UNSND (attr
);
7579 if (bits
< sizeof (l
) * 8)
7581 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
7582 l
&= ((LONGEST
) 1 << bits
) - 1;
7584 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
7587 SYMBOL_VALUE (sym
) = l
;
7588 SYMBOL_CLASS (sym
) = LOC_CONST
;
7592 /* Return the type of the die in question using its DW_AT_type attribute. */
7594 static struct type
*
7595 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7598 struct attribute
*type_attr
;
7599 struct die_info
*type_die
;
7601 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
7604 /* A missing DW_AT_type represents a void type. */
7605 return builtin_type (current_gdbarch
)->builtin_void
;
7608 type_die
= follow_die_ref (die
, type_attr
, cu
);
7610 type
= tag_type_to_type (type_die
, cu
);
7613 dump_die (type_die
);
7614 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
7620 /* Return the containing type of the die in question using its
7621 DW_AT_containing_type attribute. */
7623 static struct type
*
7624 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7626 struct type
*type
= NULL
;
7627 struct attribute
*type_attr
;
7628 struct die_info
*type_die
= NULL
;
7630 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
7633 type_die
= follow_die_ref (die
, type_attr
, cu
);
7634 type
= tag_type_to_type (type_die
, cu
);
7639 dump_die (type_die
);
7640 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
7646 static struct type
*
7647 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7655 read_type_die (die
, cu
);
7659 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
7667 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7669 char *prefix
= determine_prefix (die
, cu
);
7670 const char *old_prefix
= processing_current_prefix
;
7671 struct cleanup
*back_to
= make_cleanup (xfree
, prefix
);
7672 processing_current_prefix
= prefix
;
7676 case DW_TAG_class_type
:
7677 case DW_TAG_structure_type
:
7678 case DW_TAG_union_type
:
7679 read_structure_type (die
, cu
);
7681 case DW_TAG_enumeration_type
:
7682 read_enumeration_type (die
, cu
);
7684 case DW_TAG_subprogram
:
7685 case DW_TAG_subroutine_type
:
7686 read_subroutine_type (die
, cu
);
7688 case DW_TAG_array_type
:
7689 read_array_type (die
, cu
);
7691 case DW_TAG_set_type
:
7692 read_set_type (die
, cu
);
7694 case DW_TAG_pointer_type
:
7695 read_tag_pointer_type (die
, cu
);
7697 case DW_TAG_ptr_to_member_type
:
7698 read_tag_ptr_to_member_type (die
, cu
);
7700 case DW_TAG_reference_type
:
7701 read_tag_reference_type (die
, cu
);
7703 case DW_TAG_const_type
:
7704 read_tag_const_type (die
, cu
);
7706 case DW_TAG_volatile_type
:
7707 read_tag_volatile_type (die
, cu
);
7709 case DW_TAG_string_type
:
7710 read_tag_string_type (die
, cu
);
7712 case DW_TAG_typedef
:
7713 read_typedef (die
, cu
);
7715 case DW_TAG_subrange_type
:
7716 read_subrange_type (die
, cu
);
7718 case DW_TAG_base_type
:
7719 read_base_type (die
, cu
);
7721 case DW_TAG_unspecified_type
:
7722 read_unspecified_type (die
, cu
);
7725 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
7726 dwarf_tag_name (die
->tag
));
7730 processing_current_prefix
= old_prefix
;
7731 do_cleanups (back_to
);
7734 /* Return the name of the namespace/class that DIE is defined within,
7735 or "" if we can't tell. The caller should xfree the result. */
7737 /* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
7738 therein) for an example of how to use this function to deal with
7739 DW_AT_specification. */
7742 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
7744 struct die_info
*parent
;
7746 if (cu
->language
!= language_cplus
7747 && cu
->language
!= language_java
)
7750 parent
= die
->parent
;
7754 return xstrdup ("");
7758 switch (parent
->tag
) {
7759 case DW_TAG_namespace
:
7761 /* FIXME: carlton/2004-03-05: Should I follow extension dies
7762 before doing this check? */
7763 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7765 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7770 char *parent_prefix
= determine_prefix (parent
, cu
);
7771 char *retval
= typename_concat (NULL
, parent_prefix
,
7772 namespace_name (parent
, &dummy
,
7775 xfree (parent_prefix
);
7780 case DW_TAG_class_type
:
7781 case DW_TAG_structure_type
:
7783 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7785 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7789 const char *old_prefix
= processing_current_prefix
;
7790 char *new_prefix
= determine_prefix (parent
, cu
);
7793 processing_current_prefix
= new_prefix
;
7794 retval
= determine_class_name (parent
, cu
);
7795 processing_current_prefix
= old_prefix
;
7802 return determine_prefix (parent
, cu
);
7807 /* Return a newly-allocated string formed by concatenating PREFIX and
7808 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
7809 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
7810 perform an obconcat, otherwise allocate storage for the result. The CU argument
7811 is used to determine the language and hence, the appropriate separator. */
7813 #define MAX_SEP_LEN 2 /* sizeof ("::") */
7816 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
7817 struct dwarf2_cu
*cu
)
7821 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
7823 else if (cu
->language
== language_java
)
7830 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
7835 strcpy (retval
, prefix
);
7836 strcat (retval
, sep
);
7839 strcat (retval
, suffix
);
7845 /* We have an obstack. */
7846 return obconcat (obs
, prefix
, sep
, suffix
);
7852 copy_die (struct die_info
*old_die
)
7854 struct die_info
*new_die
;
7857 new_die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
7858 memset (new_die
, 0, sizeof (struct die_info
));
7860 new_die
->tag
= old_die
->tag
;
7861 new_die
->has_children
= old_die
->has_children
;
7862 new_die
->abbrev
= old_die
->abbrev
;
7863 new_die
->offset
= old_die
->offset
;
7864 new_die
->type
= NULL
;
7866 num_attrs
= old_die
->num_attrs
;
7867 new_die
->num_attrs
= num_attrs
;
7868 new_die
->attrs
= (struct attribute
*)
7869 xmalloc (num_attrs
* sizeof (struct attribute
));
7871 for (i
= 0; i
< old_die
->num_attrs
; ++i
)
7873 new_die
->attrs
[i
].name
= old_die
->attrs
[i
].name
;
7874 new_die
->attrs
[i
].form
= old_die
->attrs
[i
].form
;
7875 new_die
->attrs
[i
].u
.addr
= old_die
->attrs
[i
].u
.addr
;
7878 new_die
->next
= NULL
;
7883 /* Return sibling of die, NULL if no sibling. */
7885 static struct die_info
*
7886 sibling_die (struct die_info
*die
)
7888 return die
->sibling
;
7891 /* Get linkage name of a die, return NULL if not found. */
7894 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
7896 struct attribute
*attr
;
7898 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7899 if (attr
&& DW_STRING (attr
))
7900 return DW_STRING (attr
);
7901 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7902 if (attr
&& DW_STRING (attr
))
7903 return DW_STRING (attr
);
7907 /* Get name of a die, return NULL if not found. */
7910 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
7912 struct attribute
*attr
;
7914 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7915 if (attr
&& DW_STRING (attr
))
7916 return DW_STRING (attr
);
7920 /* Return the die that this die in an extension of, or NULL if there
7923 static struct die_info
*
7924 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
*cu
)
7926 struct attribute
*attr
;
7928 attr
= dwarf2_attr (die
, DW_AT_extension
, cu
);
7932 return follow_die_ref (die
, attr
, cu
);
7935 /* Convert a DIE tag into its string name. */
7938 dwarf_tag_name (unsigned tag
)
7942 case DW_TAG_padding
:
7943 return "DW_TAG_padding";
7944 case DW_TAG_array_type
:
7945 return "DW_TAG_array_type";
7946 case DW_TAG_class_type
:
7947 return "DW_TAG_class_type";
7948 case DW_TAG_entry_point
:
7949 return "DW_TAG_entry_point";
7950 case DW_TAG_enumeration_type
:
7951 return "DW_TAG_enumeration_type";
7952 case DW_TAG_formal_parameter
:
7953 return "DW_TAG_formal_parameter";
7954 case DW_TAG_imported_declaration
:
7955 return "DW_TAG_imported_declaration";
7957 return "DW_TAG_label";
7958 case DW_TAG_lexical_block
:
7959 return "DW_TAG_lexical_block";
7961 return "DW_TAG_member";
7962 case DW_TAG_pointer_type
:
7963 return "DW_TAG_pointer_type";
7964 case DW_TAG_reference_type
:
7965 return "DW_TAG_reference_type";
7966 case DW_TAG_compile_unit
:
7967 return "DW_TAG_compile_unit";
7968 case DW_TAG_string_type
:
7969 return "DW_TAG_string_type";
7970 case DW_TAG_structure_type
:
7971 return "DW_TAG_structure_type";
7972 case DW_TAG_subroutine_type
:
7973 return "DW_TAG_subroutine_type";
7974 case DW_TAG_typedef
:
7975 return "DW_TAG_typedef";
7976 case DW_TAG_union_type
:
7977 return "DW_TAG_union_type";
7978 case DW_TAG_unspecified_parameters
:
7979 return "DW_TAG_unspecified_parameters";
7980 case DW_TAG_variant
:
7981 return "DW_TAG_variant";
7982 case DW_TAG_common_block
:
7983 return "DW_TAG_common_block";
7984 case DW_TAG_common_inclusion
:
7985 return "DW_TAG_common_inclusion";
7986 case DW_TAG_inheritance
:
7987 return "DW_TAG_inheritance";
7988 case DW_TAG_inlined_subroutine
:
7989 return "DW_TAG_inlined_subroutine";
7991 return "DW_TAG_module";
7992 case DW_TAG_ptr_to_member_type
:
7993 return "DW_TAG_ptr_to_member_type";
7994 case DW_TAG_set_type
:
7995 return "DW_TAG_set_type";
7996 case DW_TAG_subrange_type
:
7997 return "DW_TAG_subrange_type";
7998 case DW_TAG_with_stmt
:
7999 return "DW_TAG_with_stmt";
8000 case DW_TAG_access_declaration
:
8001 return "DW_TAG_access_declaration";
8002 case DW_TAG_base_type
:
8003 return "DW_TAG_base_type";
8004 case DW_TAG_catch_block
:
8005 return "DW_TAG_catch_block";
8006 case DW_TAG_const_type
:
8007 return "DW_TAG_const_type";
8008 case DW_TAG_constant
:
8009 return "DW_TAG_constant";
8010 case DW_TAG_enumerator
:
8011 return "DW_TAG_enumerator";
8012 case DW_TAG_file_type
:
8013 return "DW_TAG_file_type";
8015 return "DW_TAG_friend";
8016 case DW_TAG_namelist
:
8017 return "DW_TAG_namelist";
8018 case DW_TAG_namelist_item
:
8019 return "DW_TAG_namelist_item";
8020 case DW_TAG_packed_type
:
8021 return "DW_TAG_packed_type";
8022 case DW_TAG_subprogram
:
8023 return "DW_TAG_subprogram";
8024 case DW_TAG_template_type_param
:
8025 return "DW_TAG_template_type_param";
8026 case DW_TAG_template_value_param
:
8027 return "DW_TAG_template_value_param";
8028 case DW_TAG_thrown_type
:
8029 return "DW_TAG_thrown_type";
8030 case DW_TAG_try_block
:
8031 return "DW_TAG_try_block";
8032 case DW_TAG_variant_part
:
8033 return "DW_TAG_variant_part";
8034 case DW_TAG_variable
:
8035 return "DW_TAG_variable";
8036 case DW_TAG_volatile_type
:
8037 return "DW_TAG_volatile_type";
8038 case DW_TAG_dwarf_procedure
:
8039 return "DW_TAG_dwarf_procedure";
8040 case DW_TAG_restrict_type
:
8041 return "DW_TAG_restrict_type";
8042 case DW_TAG_interface_type
:
8043 return "DW_TAG_interface_type";
8044 case DW_TAG_namespace
:
8045 return "DW_TAG_namespace";
8046 case DW_TAG_imported_module
:
8047 return "DW_TAG_imported_module";
8048 case DW_TAG_unspecified_type
:
8049 return "DW_TAG_unspecified_type";
8050 case DW_TAG_partial_unit
:
8051 return "DW_TAG_partial_unit";
8052 case DW_TAG_imported_unit
:
8053 return "DW_TAG_imported_unit";
8054 case DW_TAG_condition
:
8055 return "DW_TAG_condition";
8056 case DW_TAG_shared_type
:
8057 return "DW_TAG_shared_type";
8058 case DW_TAG_MIPS_loop
:
8059 return "DW_TAG_MIPS_loop";
8060 case DW_TAG_HP_array_descriptor
:
8061 return "DW_TAG_HP_array_descriptor";
8062 case DW_TAG_format_label
:
8063 return "DW_TAG_format_label";
8064 case DW_TAG_function_template
:
8065 return "DW_TAG_function_template";
8066 case DW_TAG_class_template
:
8067 return "DW_TAG_class_template";
8068 case DW_TAG_GNU_BINCL
:
8069 return "DW_TAG_GNU_BINCL";
8070 case DW_TAG_GNU_EINCL
:
8071 return "DW_TAG_GNU_EINCL";
8072 case DW_TAG_upc_shared_type
:
8073 return "DW_TAG_upc_shared_type";
8074 case DW_TAG_upc_strict_type
:
8075 return "DW_TAG_upc_strict_type";
8076 case DW_TAG_upc_relaxed_type
:
8077 return "DW_TAG_upc_relaxed_type";
8078 case DW_TAG_PGI_kanji_type
:
8079 return "DW_TAG_PGI_kanji_type";
8080 case DW_TAG_PGI_interface_block
:
8081 return "DW_TAG_PGI_interface_block";
8083 return "DW_TAG_<unknown>";
8087 /* Convert a DWARF attribute code into its string name. */
8090 dwarf_attr_name (unsigned attr
)
8095 return "DW_AT_sibling";
8096 case DW_AT_location
:
8097 return "DW_AT_location";
8099 return "DW_AT_name";
8100 case DW_AT_ordering
:
8101 return "DW_AT_ordering";
8102 case DW_AT_subscr_data
:
8103 return "DW_AT_subscr_data";
8104 case DW_AT_byte_size
:
8105 return "DW_AT_byte_size";
8106 case DW_AT_bit_offset
:
8107 return "DW_AT_bit_offset";
8108 case DW_AT_bit_size
:
8109 return "DW_AT_bit_size";
8110 case DW_AT_element_list
:
8111 return "DW_AT_element_list";
8112 case DW_AT_stmt_list
:
8113 return "DW_AT_stmt_list";
8115 return "DW_AT_low_pc";
8117 return "DW_AT_high_pc";
8118 case DW_AT_language
:
8119 return "DW_AT_language";
8121 return "DW_AT_member";
8123 return "DW_AT_discr";
8124 case DW_AT_discr_value
:
8125 return "DW_AT_discr_value";
8126 case DW_AT_visibility
:
8127 return "DW_AT_visibility";
8129 return "DW_AT_import";
8130 case DW_AT_string_length
:
8131 return "DW_AT_string_length";
8132 case DW_AT_common_reference
:
8133 return "DW_AT_common_reference";
8134 case DW_AT_comp_dir
:
8135 return "DW_AT_comp_dir";
8136 case DW_AT_const_value
:
8137 return "DW_AT_const_value";
8138 case DW_AT_containing_type
:
8139 return "DW_AT_containing_type";
8140 case DW_AT_default_value
:
8141 return "DW_AT_default_value";
8143 return "DW_AT_inline";
8144 case DW_AT_is_optional
:
8145 return "DW_AT_is_optional";
8146 case DW_AT_lower_bound
:
8147 return "DW_AT_lower_bound";
8148 case DW_AT_producer
:
8149 return "DW_AT_producer";
8150 case DW_AT_prototyped
:
8151 return "DW_AT_prototyped";
8152 case DW_AT_return_addr
:
8153 return "DW_AT_return_addr";
8154 case DW_AT_start_scope
:
8155 return "DW_AT_start_scope";
8156 case DW_AT_bit_stride
:
8157 return "DW_AT_bit_stride";
8158 case DW_AT_upper_bound
:
8159 return "DW_AT_upper_bound";
8160 case DW_AT_abstract_origin
:
8161 return "DW_AT_abstract_origin";
8162 case DW_AT_accessibility
:
8163 return "DW_AT_accessibility";
8164 case DW_AT_address_class
:
8165 return "DW_AT_address_class";
8166 case DW_AT_artificial
:
8167 return "DW_AT_artificial";
8168 case DW_AT_base_types
:
8169 return "DW_AT_base_types";
8170 case DW_AT_calling_convention
:
8171 return "DW_AT_calling_convention";
8173 return "DW_AT_count";
8174 case DW_AT_data_member_location
:
8175 return "DW_AT_data_member_location";
8176 case DW_AT_decl_column
:
8177 return "DW_AT_decl_column";
8178 case DW_AT_decl_file
:
8179 return "DW_AT_decl_file";
8180 case DW_AT_decl_line
:
8181 return "DW_AT_decl_line";
8182 case DW_AT_declaration
:
8183 return "DW_AT_declaration";
8184 case DW_AT_discr_list
:
8185 return "DW_AT_discr_list";
8186 case DW_AT_encoding
:
8187 return "DW_AT_encoding";
8188 case DW_AT_external
:
8189 return "DW_AT_external";
8190 case DW_AT_frame_base
:
8191 return "DW_AT_frame_base";
8193 return "DW_AT_friend";
8194 case DW_AT_identifier_case
:
8195 return "DW_AT_identifier_case";
8196 case DW_AT_macro_info
:
8197 return "DW_AT_macro_info";
8198 case DW_AT_namelist_items
:
8199 return "DW_AT_namelist_items";
8200 case DW_AT_priority
:
8201 return "DW_AT_priority";
8203 return "DW_AT_segment";
8204 case DW_AT_specification
:
8205 return "DW_AT_specification";
8206 case DW_AT_static_link
:
8207 return "DW_AT_static_link";
8209 return "DW_AT_type";
8210 case DW_AT_use_location
:
8211 return "DW_AT_use_location";
8212 case DW_AT_variable_parameter
:
8213 return "DW_AT_variable_parameter";
8214 case DW_AT_virtuality
:
8215 return "DW_AT_virtuality";
8216 case DW_AT_vtable_elem_location
:
8217 return "DW_AT_vtable_elem_location";
8218 /* DWARF 3 values. */
8219 case DW_AT_allocated
:
8220 return "DW_AT_allocated";
8221 case DW_AT_associated
:
8222 return "DW_AT_associated";
8223 case DW_AT_data_location
:
8224 return "DW_AT_data_location";
8225 case DW_AT_byte_stride
:
8226 return "DW_AT_byte_stride";
8227 case DW_AT_entry_pc
:
8228 return "DW_AT_entry_pc";
8229 case DW_AT_use_UTF8
:
8230 return "DW_AT_use_UTF8";
8231 case DW_AT_extension
:
8232 return "DW_AT_extension";
8234 return "DW_AT_ranges";
8235 case DW_AT_trampoline
:
8236 return "DW_AT_trampoline";
8237 case DW_AT_call_column
:
8238 return "DW_AT_call_column";
8239 case DW_AT_call_file
:
8240 return "DW_AT_call_file";
8241 case DW_AT_call_line
:
8242 return "DW_AT_call_line";
8243 case DW_AT_description
:
8244 return "DW_AT_description";
8245 case DW_AT_binary_scale
:
8246 return "DW_AT_binary_scale";
8247 case DW_AT_decimal_scale
:
8248 return "DW_AT_decimal_scale";
8250 return "DW_AT_small";
8251 case DW_AT_decimal_sign
:
8252 return "DW_AT_decimal_sign";
8253 case DW_AT_digit_count
:
8254 return "DW_AT_digit_count";
8255 case DW_AT_picture_string
:
8256 return "DW_AT_picture_string";
8258 return "DW_AT_mutable";
8259 case DW_AT_threads_scaled
:
8260 return "DW_AT_threads_scaled";
8261 case DW_AT_explicit
:
8262 return "DW_AT_explicit";
8263 case DW_AT_object_pointer
:
8264 return "DW_AT_object_pointer";
8265 case DW_AT_endianity
:
8266 return "DW_AT_endianity";
8267 case DW_AT_elemental
:
8268 return "DW_AT_elemental";
8270 return "DW_AT_pure";
8271 case DW_AT_recursive
:
8272 return "DW_AT_recursive";
8274 /* SGI/MIPS extensions. */
8275 case DW_AT_MIPS_fde
:
8276 return "DW_AT_MIPS_fde";
8277 case DW_AT_MIPS_loop_begin
:
8278 return "DW_AT_MIPS_loop_begin";
8279 case DW_AT_MIPS_tail_loop_begin
:
8280 return "DW_AT_MIPS_tail_loop_begin";
8281 case DW_AT_MIPS_epilog_begin
:
8282 return "DW_AT_MIPS_epilog_begin";
8283 case DW_AT_MIPS_loop_unroll_factor
:
8284 return "DW_AT_MIPS_loop_unroll_factor";
8285 case DW_AT_MIPS_software_pipeline_depth
:
8286 return "DW_AT_MIPS_software_pipeline_depth";
8287 case DW_AT_MIPS_linkage_name
:
8288 return "DW_AT_MIPS_linkage_name";
8289 case DW_AT_MIPS_stride
:
8290 return "DW_AT_MIPS_stride";
8291 case DW_AT_MIPS_abstract_name
:
8292 return "DW_AT_MIPS_abstract_name";
8293 case DW_AT_MIPS_clone_origin
:
8294 return "DW_AT_MIPS_clone_origin";
8295 case DW_AT_MIPS_has_inlines
:
8296 return "DW_AT_MIPS_has_inlines";
8298 /* HP extensions. */
8299 case DW_AT_HP_block_index
:
8300 return "DW_AT_HP_block_index";
8301 case DW_AT_HP_unmodifiable
:
8302 return "DW_AT_HP_unmodifiable";
8303 case DW_AT_HP_actuals_stmt_list
:
8304 return "DW_AT_HP_actuals_stmt_list";
8305 case DW_AT_HP_proc_per_section
:
8306 return "DW_AT_HP_proc_per_section";
8307 case DW_AT_HP_raw_data_ptr
:
8308 return "DW_AT_HP_raw_data_ptr";
8309 case DW_AT_HP_pass_by_reference
:
8310 return "DW_AT_HP_pass_by_reference";
8311 case DW_AT_HP_opt_level
:
8312 return "DW_AT_HP_opt_level";
8313 case DW_AT_HP_prof_version_id
:
8314 return "DW_AT_HP_prof_version_id";
8315 case DW_AT_HP_opt_flags
:
8316 return "DW_AT_HP_opt_flags";
8317 case DW_AT_HP_cold_region_low_pc
:
8318 return "DW_AT_HP_cold_region_low_pc";
8319 case DW_AT_HP_cold_region_high_pc
:
8320 return "DW_AT_HP_cold_region_high_pc";
8321 case DW_AT_HP_all_variables_modifiable
:
8322 return "DW_AT_HP_all_variables_modifiable";
8323 case DW_AT_HP_linkage_name
:
8324 return "DW_AT_HP_linkage_name";
8325 case DW_AT_HP_prof_flags
:
8326 return "DW_AT_HP_prof_flags";
8327 /* GNU extensions. */
8328 case DW_AT_sf_names
:
8329 return "DW_AT_sf_names";
8330 case DW_AT_src_info
:
8331 return "DW_AT_src_info";
8332 case DW_AT_mac_info
:
8333 return "DW_AT_mac_info";
8334 case DW_AT_src_coords
:
8335 return "DW_AT_src_coords";
8336 case DW_AT_body_begin
:
8337 return "DW_AT_body_begin";
8338 case DW_AT_body_end
:
8339 return "DW_AT_body_end";
8340 case DW_AT_GNU_vector
:
8341 return "DW_AT_GNU_vector";
8342 /* VMS extensions. */
8343 case DW_AT_VMS_rtnbeg_pd_address
:
8344 return "DW_AT_VMS_rtnbeg_pd_address";
8345 /* UPC extension. */
8346 case DW_AT_upc_threads_scaled
:
8347 return "DW_AT_upc_threads_scaled";
8348 /* PGI (STMicroelectronics) extensions. */
8349 case DW_AT_PGI_lbase
:
8350 return "DW_AT_PGI_lbase";
8351 case DW_AT_PGI_soffset
:
8352 return "DW_AT_PGI_soffset";
8353 case DW_AT_PGI_lstride
:
8354 return "DW_AT_PGI_lstride";
8356 return "DW_AT_<unknown>";
8360 /* Convert a DWARF value form code into its string name. */
8363 dwarf_form_name (unsigned form
)
8368 return "DW_FORM_addr";
8369 case DW_FORM_block2
:
8370 return "DW_FORM_block2";
8371 case DW_FORM_block4
:
8372 return "DW_FORM_block4";
8374 return "DW_FORM_data2";
8376 return "DW_FORM_data4";
8378 return "DW_FORM_data8";
8379 case DW_FORM_string
:
8380 return "DW_FORM_string";
8382 return "DW_FORM_block";
8383 case DW_FORM_block1
:
8384 return "DW_FORM_block1";
8386 return "DW_FORM_data1";
8388 return "DW_FORM_flag";
8390 return "DW_FORM_sdata";
8392 return "DW_FORM_strp";
8394 return "DW_FORM_udata";
8395 case DW_FORM_ref_addr
:
8396 return "DW_FORM_ref_addr";
8398 return "DW_FORM_ref1";
8400 return "DW_FORM_ref2";
8402 return "DW_FORM_ref4";
8404 return "DW_FORM_ref8";
8405 case DW_FORM_ref_udata
:
8406 return "DW_FORM_ref_udata";
8407 case DW_FORM_indirect
:
8408 return "DW_FORM_indirect";
8410 return "DW_FORM_<unknown>";
8414 /* Convert a DWARF stack opcode into its string name. */
8417 dwarf_stack_op_name (unsigned op
)
8422 return "DW_OP_addr";
8424 return "DW_OP_deref";
8426 return "DW_OP_const1u";
8428 return "DW_OP_const1s";
8430 return "DW_OP_const2u";
8432 return "DW_OP_const2s";
8434 return "DW_OP_const4u";
8436 return "DW_OP_const4s";
8438 return "DW_OP_const8u";
8440 return "DW_OP_const8s";
8442 return "DW_OP_constu";
8444 return "DW_OP_consts";
8448 return "DW_OP_drop";
8450 return "DW_OP_over";
8452 return "DW_OP_pick";
8454 return "DW_OP_swap";
8458 return "DW_OP_xderef";
8466 return "DW_OP_minus";
8478 return "DW_OP_plus";
8479 case DW_OP_plus_uconst
:
8480 return "DW_OP_plus_uconst";
8486 return "DW_OP_shra";
8504 return "DW_OP_skip";
8506 return "DW_OP_lit0";
8508 return "DW_OP_lit1";
8510 return "DW_OP_lit2";
8512 return "DW_OP_lit3";
8514 return "DW_OP_lit4";
8516 return "DW_OP_lit5";
8518 return "DW_OP_lit6";
8520 return "DW_OP_lit7";
8522 return "DW_OP_lit8";
8524 return "DW_OP_lit9";
8526 return "DW_OP_lit10";
8528 return "DW_OP_lit11";
8530 return "DW_OP_lit12";
8532 return "DW_OP_lit13";
8534 return "DW_OP_lit14";
8536 return "DW_OP_lit15";
8538 return "DW_OP_lit16";
8540 return "DW_OP_lit17";
8542 return "DW_OP_lit18";
8544 return "DW_OP_lit19";
8546 return "DW_OP_lit20";
8548 return "DW_OP_lit21";
8550 return "DW_OP_lit22";
8552 return "DW_OP_lit23";
8554 return "DW_OP_lit24";
8556 return "DW_OP_lit25";
8558 return "DW_OP_lit26";
8560 return "DW_OP_lit27";
8562 return "DW_OP_lit28";
8564 return "DW_OP_lit29";
8566 return "DW_OP_lit30";
8568 return "DW_OP_lit31";
8570 return "DW_OP_reg0";
8572 return "DW_OP_reg1";
8574 return "DW_OP_reg2";
8576 return "DW_OP_reg3";
8578 return "DW_OP_reg4";
8580 return "DW_OP_reg5";
8582 return "DW_OP_reg6";
8584 return "DW_OP_reg7";
8586 return "DW_OP_reg8";
8588 return "DW_OP_reg9";
8590 return "DW_OP_reg10";
8592 return "DW_OP_reg11";
8594 return "DW_OP_reg12";
8596 return "DW_OP_reg13";
8598 return "DW_OP_reg14";
8600 return "DW_OP_reg15";
8602 return "DW_OP_reg16";
8604 return "DW_OP_reg17";
8606 return "DW_OP_reg18";
8608 return "DW_OP_reg19";
8610 return "DW_OP_reg20";
8612 return "DW_OP_reg21";
8614 return "DW_OP_reg22";
8616 return "DW_OP_reg23";
8618 return "DW_OP_reg24";
8620 return "DW_OP_reg25";
8622 return "DW_OP_reg26";
8624 return "DW_OP_reg27";
8626 return "DW_OP_reg28";
8628 return "DW_OP_reg29";
8630 return "DW_OP_reg30";
8632 return "DW_OP_reg31";
8634 return "DW_OP_breg0";
8636 return "DW_OP_breg1";
8638 return "DW_OP_breg2";
8640 return "DW_OP_breg3";
8642 return "DW_OP_breg4";
8644 return "DW_OP_breg5";
8646 return "DW_OP_breg6";
8648 return "DW_OP_breg7";
8650 return "DW_OP_breg8";
8652 return "DW_OP_breg9";
8654 return "DW_OP_breg10";
8656 return "DW_OP_breg11";
8658 return "DW_OP_breg12";
8660 return "DW_OP_breg13";
8662 return "DW_OP_breg14";
8664 return "DW_OP_breg15";
8666 return "DW_OP_breg16";
8668 return "DW_OP_breg17";
8670 return "DW_OP_breg18";
8672 return "DW_OP_breg19";
8674 return "DW_OP_breg20";
8676 return "DW_OP_breg21";
8678 return "DW_OP_breg22";
8680 return "DW_OP_breg23";
8682 return "DW_OP_breg24";
8684 return "DW_OP_breg25";
8686 return "DW_OP_breg26";
8688 return "DW_OP_breg27";
8690 return "DW_OP_breg28";
8692 return "DW_OP_breg29";
8694 return "DW_OP_breg30";
8696 return "DW_OP_breg31";
8698 return "DW_OP_regx";
8700 return "DW_OP_fbreg";
8702 return "DW_OP_bregx";
8704 return "DW_OP_piece";
8705 case DW_OP_deref_size
:
8706 return "DW_OP_deref_size";
8707 case DW_OP_xderef_size
:
8708 return "DW_OP_xderef_size";
8711 /* DWARF 3 extensions. */
8712 case DW_OP_push_object_address
:
8713 return "DW_OP_push_object_address";
8715 return "DW_OP_call2";
8717 return "DW_OP_call4";
8718 case DW_OP_call_ref
:
8719 return "DW_OP_call_ref";
8720 /* GNU extensions. */
8721 case DW_OP_form_tls_address
:
8722 return "DW_OP_form_tls_address";
8723 case DW_OP_call_frame_cfa
:
8724 return "DW_OP_call_frame_cfa";
8725 case DW_OP_bit_piece
:
8726 return "DW_OP_bit_piece";
8727 case DW_OP_GNU_push_tls_address
:
8728 return "DW_OP_GNU_push_tls_address";
8729 case DW_OP_GNU_uninit
:
8730 return "DW_OP_GNU_uninit";
8731 /* HP extensions. */
8732 case DW_OP_HP_is_value
:
8733 return "DW_OP_HP_is_value";
8734 case DW_OP_HP_fltconst4
:
8735 return "DW_OP_HP_fltconst4";
8736 case DW_OP_HP_fltconst8
:
8737 return "DW_OP_HP_fltconst8";
8738 case DW_OP_HP_mod_range
:
8739 return "DW_OP_HP_mod_range";
8740 case DW_OP_HP_unmod_range
:
8741 return "DW_OP_HP_unmod_range";
8743 return "DW_OP_HP_tls";
8745 return "OP_<unknown>";
8750 dwarf_bool_name (unsigned mybool
)
8758 /* Convert a DWARF type code into its string name. */
8761 dwarf_type_encoding_name (unsigned enc
)
8766 return "DW_ATE_void";
8767 case DW_ATE_address
:
8768 return "DW_ATE_address";
8769 case DW_ATE_boolean
:
8770 return "DW_ATE_boolean";
8771 case DW_ATE_complex_float
:
8772 return "DW_ATE_complex_float";
8774 return "DW_ATE_float";
8776 return "DW_ATE_signed";
8777 case DW_ATE_signed_char
:
8778 return "DW_ATE_signed_char";
8779 case DW_ATE_unsigned
:
8780 return "DW_ATE_unsigned";
8781 case DW_ATE_unsigned_char
:
8782 return "DW_ATE_unsigned_char";
8784 case DW_ATE_imaginary_float
:
8785 return "DW_ATE_imaginary_float";
8786 case DW_ATE_packed_decimal
:
8787 return "DW_ATE_packed_decimal";
8788 case DW_ATE_numeric_string
:
8789 return "DW_ATE_numeric_string";
8791 return "DW_ATE_edited";
8792 case DW_ATE_signed_fixed
:
8793 return "DW_ATE_signed_fixed";
8794 case DW_ATE_unsigned_fixed
:
8795 return "DW_ATE_unsigned_fixed";
8796 case DW_ATE_decimal_float
:
8797 return "DW_ATE_decimal_float";
8798 /* HP extensions. */
8799 case DW_ATE_HP_float80
:
8800 return "DW_ATE_HP_float80";
8801 case DW_ATE_HP_complex_float80
:
8802 return "DW_ATE_HP_complex_float80";
8803 case DW_ATE_HP_float128
:
8804 return "DW_ATE_HP_float128";
8805 case DW_ATE_HP_complex_float128
:
8806 return "DW_ATE_HP_complex_float128";
8807 case DW_ATE_HP_floathpintel
:
8808 return "DW_ATE_HP_floathpintel";
8809 case DW_ATE_HP_imaginary_float80
:
8810 return "DW_ATE_HP_imaginary_float80";
8811 case DW_ATE_HP_imaginary_float128
:
8812 return "DW_ATE_HP_imaginary_float128";
8814 return "DW_ATE_<unknown>";
8818 /* Convert a DWARF call frame info operation to its string name. */
8822 dwarf_cfi_name (unsigned cfi_opc
)
8826 case DW_CFA_advance_loc
:
8827 return "DW_CFA_advance_loc";
8829 return "DW_CFA_offset";
8830 case DW_CFA_restore
:
8831 return "DW_CFA_restore";
8833 return "DW_CFA_nop";
8834 case DW_CFA_set_loc
:
8835 return "DW_CFA_set_loc";
8836 case DW_CFA_advance_loc1
:
8837 return "DW_CFA_advance_loc1";
8838 case DW_CFA_advance_loc2
:
8839 return "DW_CFA_advance_loc2";
8840 case DW_CFA_advance_loc4
:
8841 return "DW_CFA_advance_loc4";
8842 case DW_CFA_offset_extended
:
8843 return "DW_CFA_offset_extended";
8844 case DW_CFA_restore_extended
:
8845 return "DW_CFA_restore_extended";
8846 case DW_CFA_undefined
:
8847 return "DW_CFA_undefined";
8848 case DW_CFA_same_value
:
8849 return "DW_CFA_same_value";
8850 case DW_CFA_register
:
8851 return "DW_CFA_register";
8852 case DW_CFA_remember_state
:
8853 return "DW_CFA_remember_state";
8854 case DW_CFA_restore_state
:
8855 return "DW_CFA_restore_state";
8856 case DW_CFA_def_cfa
:
8857 return "DW_CFA_def_cfa";
8858 case DW_CFA_def_cfa_register
:
8859 return "DW_CFA_def_cfa_register";
8860 case DW_CFA_def_cfa_offset
:
8861 return "DW_CFA_def_cfa_offset";
8863 case DW_CFA_def_cfa_expression
:
8864 return "DW_CFA_def_cfa_expression";
8865 case DW_CFA_expression
:
8866 return "DW_CFA_expression";
8867 case DW_CFA_offset_extended_sf
:
8868 return "DW_CFA_offset_extended_sf";
8869 case DW_CFA_def_cfa_sf
:
8870 return "DW_CFA_def_cfa_sf";
8871 case DW_CFA_def_cfa_offset_sf
:
8872 return "DW_CFA_def_cfa_offset_sf";
8873 case DW_CFA_val_offset
:
8874 return "DW_CFA_val_offset";
8875 case DW_CFA_val_offset_sf
:
8876 return "DW_CFA_val_offset_sf";
8877 case DW_CFA_val_expression
:
8878 return "DW_CFA_val_expression";
8879 /* SGI/MIPS specific. */
8880 case DW_CFA_MIPS_advance_loc8
:
8881 return "DW_CFA_MIPS_advance_loc8";
8882 /* GNU extensions. */
8883 case DW_CFA_GNU_window_save
:
8884 return "DW_CFA_GNU_window_save";
8885 case DW_CFA_GNU_args_size
:
8886 return "DW_CFA_GNU_args_size";
8887 case DW_CFA_GNU_negative_offset_extended
:
8888 return "DW_CFA_GNU_negative_offset_extended";
8890 return "DW_CFA_<unknown>";
8896 dump_die (struct die_info
*die
)
8900 fprintf_unfiltered (gdb_stderr
, "Die: %s (abbrev = %d, offset = %d)\n",
8901 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
8902 fprintf_unfiltered (gdb_stderr
, "\thas children: %s\n",
8903 dwarf_bool_name (die
->child
!= NULL
));
8905 fprintf_unfiltered (gdb_stderr
, "\tattributes:\n");
8906 for (i
= 0; i
< die
->num_attrs
; ++i
)
8908 fprintf_unfiltered (gdb_stderr
, "\t\t%s (%s) ",
8909 dwarf_attr_name (die
->attrs
[i
].name
),
8910 dwarf_form_name (die
->attrs
[i
].form
));
8911 switch (die
->attrs
[i
].form
)
8913 case DW_FORM_ref_addr
:
8915 fprintf_unfiltered (gdb_stderr
, "address: ");
8916 deprecated_print_address_numeric (DW_ADDR (&die
->attrs
[i
]), 1, gdb_stderr
);
8918 case DW_FORM_block2
:
8919 case DW_FORM_block4
:
8921 case DW_FORM_block1
:
8922 fprintf_unfiltered (gdb_stderr
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
8927 fprintf_unfiltered (gdb_stderr
, "constant ref: %ld (adjusted)",
8928 (long) (DW_ADDR (&die
->attrs
[i
])));
8936 fprintf_unfiltered (gdb_stderr
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
8938 case DW_FORM_string
:
8940 fprintf_unfiltered (gdb_stderr
, "string: \"%s\"",
8941 DW_STRING (&die
->attrs
[i
])
8942 ? DW_STRING (&die
->attrs
[i
]) : "");
8945 if (DW_UNSND (&die
->attrs
[i
]))
8946 fprintf_unfiltered (gdb_stderr
, "flag: TRUE");
8948 fprintf_unfiltered (gdb_stderr
, "flag: FALSE");
8950 case DW_FORM_indirect
:
8951 /* the reader will have reduced the indirect form to
8952 the "base form" so this form should not occur */
8953 fprintf_unfiltered (gdb_stderr
, "unexpected attribute form: DW_FORM_indirect");
8956 fprintf_unfiltered (gdb_stderr
, "unsupported attribute form: %d.",
8957 die
->attrs
[i
].form
);
8959 fprintf_unfiltered (gdb_stderr
, "\n");
8964 dump_die_list (struct die_info
*die
)
8969 if (die
->child
!= NULL
)
8970 dump_die_list (die
->child
);
8971 if (die
->sibling
!= NULL
)
8972 dump_die_list (die
->sibling
);
8977 store_in_ref_table (unsigned int offset
, struct die_info
*die
,
8978 struct dwarf2_cu
*cu
)
8981 struct die_info
*old
;
8983 h
= (offset
% REF_HASH_SIZE
);
8984 old
= cu
->die_ref_table
[h
];
8985 die
->next_ref
= old
;
8986 cu
->die_ref_table
[h
] = die
;
8990 dwarf2_get_ref_die_offset (struct attribute
*attr
, struct dwarf2_cu
*cu
)
8992 unsigned int result
= 0;
8996 case DW_FORM_ref_addr
:
9001 case DW_FORM_ref_udata
:
9002 result
= DW_ADDR (attr
);
9005 complaint (&symfile_complaints
,
9006 _("unsupported die ref attribute form: '%s'"),
9007 dwarf_form_name (attr
->form
));
9012 /* Return the constant value held by the given attribute. Return -1
9013 if the value held by the attribute is not constant. */
9016 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
9018 if (attr
->form
== DW_FORM_sdata
)
9019 return DW_SND (attr
);
9020 else if (attr
->form
== DW_FORM_udata
9021 || attr
->form
== DW_FORM_data1
9022 || attr
->form
== DW_FORM_data2
9023 || attr
->form
== DW_FORM_data4
9024 || attr
->form
== DW_FORM_data8
)
9025 return DW_UNSND (attr
);
9028 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
9029 dwarf_form_name (attr
->form
));
9030 return default_value
;
9034 static struct die_info
*
9035 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
9036 struct dwarf2_cu
*cu
)
9038 struct die_info
*die
;
9039 unsigned int offset
;
9041 struct die_info temp_die
;
9042 struct dwarf2_cu
*target_cu
;
9044 offset
= dwarf2_get_ref_die_offset (attr
, cu
);
9046 if (DW_ADDR (attr
) < cu
->header
.offset
9047 || DW_ADDR (attr
) >= cu
->header
.offset
+ cu
->header
.length
)
9049 struct dwarf2_per_cu_data
*per_cu
;
9050 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (attr
),
9052 target_cu
= per_cu
->cu
;
9057 h
= (offset
% REF_HASH_SIZE
);
9058 die
= target_cu
->die_ref_table
[h
];
9061 if (die
->offset
== offset
)
9063 die
= die
->next_ref
;
9066 error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE "
9067 "at 0x%lx [in module %s]"),
9068 (long) src_die
->offset
, (long) offset
, cu
->objfile
->name
);
9073 /* Decode simple location descriptions.
9074 Given a pointer to a dwarf block that defines a location, compute
9075 the location and return the value.
9077 NOTE drow/2003-11-18: This function is called in two situations
9078 now: for the address of static or global variables (partial symbols
9079 only) and for offsets into structures which are expected to be
9080 (more or less) constant. The partial symbol case should go away,
9081 and only the constant case should remain. That will let this
9082 function complain more accurately. A few special modes are allowed
9083 without complaint for global variables (for instance, global
9084 register values and thread-local values).
9086 A location description containing no operations indicates that the
9087 object is optimized out. The return value is 0 for that case.
9088 FIXME drow/2003-11-16: No callers check for this case any more; soon all
9089 callers will only want a very basic result and this can become a
9092 Note that stack[0] is unused except as a default error return.
9093 Note that stack overflow is not yet handled. */
9096 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
9098 struct objfile
*objfile
= cu
->objfile
;
9099 struct comp_unit_head
*cu_header
= &cu
->header
;
9101 int size
= blk
->size
;
9102 gdb_byte
*data
= blk
->data
;
9103 CORE_ADDR stack
[64];
9105 unsigned int bytes_read
, unsnd
;
9149 stack
[++stacki
] = op
- DW_OP_lit0
;
9184 stack
[++stacki
] = op
- DW_OP_reg0
;
9186 dwarf2_complex_location_expr_complaint ();
9190 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9192 stack
[++stacki
] = unsnd
;
9194 dwarf2_complex_location_expr_complaint ();
9198 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
9204 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
9209 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
9214 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
9219 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
9224 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
9229 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
9234 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
9240 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
9245 stack
[stacki
+ 1] = stack
[stacki
];
9250 stack
[stacki
- 1] += stack
[stacki
];
9254 case DW_OP_plus_uconst
:
9255 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9260 stack
[stacki
- 1] -= stack
[stacki
];
9265 /* If we're not the last op, then we definitely can't encode
9266 this using GDB's address_class enum. This is valid for partial
9267 global symbols, although the variable's address will be bogus
9270 dwarf2_complex_location_expr_complaint ();
9273 case DW_OP_GNU_push_tls_address
:
9274 /* The top of the stack has the offset from the beginning
9275 of the thread control block at which the variable is located. */
9276 /* Nothing should follow this operator, so the top of stack would
9278 /* This is valid for partial global symbols, but the variable's
9279 address will be bogus in the psymtab. */
9281 dwarf2_complex_location_expr_complaint ();
9284 case DW_OP_GNU_uninit
:
9288 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
9289 dwarf_stack_op_name (op
));
9290 return (stack
[stacki
]);
9293 return (stack
[stacki
]);
9296 /* memory allocation interface */
9298 static struct dwarf_block
*
9299 dwarf_alloc_block (struct dwarf2_cu
*cu
)
9301 struct dwarf_block
*blk
;
9303 blk
= (struct dwarf_block
*)
9304 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
9308 static struct abbrev_info
*
9309 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
9311 struct abbrev_info
*abbrev
;
9313 abbrev
= (struct abbrev_info
*)
9314 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
9315 memset (abbrev
, 0, sizeof (struct abbrev_info
));
9319 static struct die_info
*
9320 dwarf_alloc_die (void)
9322 struct die_info
*die
;
9324 die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
9325 memset (die
, 0, sizeof (struct die_info
));
9330 /* Macro support. */
9333 /* Return the full name of file number I in *LH's file name table.
9334 Use COMP_DIR as the name of the current directory of the
9335 compilation. The result is allocated using xmalloc; the caller is
9336 responsible for freeing it. */
9338 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
9340 /* Is the file number a valid index into the line header's file name
9341 table? Remember that file numbers start with one, not zero. */
9342 if (1 <= file
&& file
<= lh
->num_file_names
)
9344 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
9346 if (IS_ABSOLUTE_PATH (fe
->name
))
9347 return xstrdup (fe
->name
);
9355 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9361 dir_len
= strlen (dir
);
9362 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
9363 strcpy (full_name
, dir
);
9364 full_name
[dir_len
] = '/';
9365 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
9369 return xstrdup (fe
->name
);
9374 /* The compiler produced a bogus file number. We can at least
9375 record the macro definitions made in the file, even if we
9376 won't be able to find the file by name. */
9378 sprintf (fake_name
, "<bad macro file number %d>", file
);
9380 complaint (&symfile_complaints
,
9381 _("bad file number in macro information (%d)"),
9384 return xstrdup (fake_name
);
9389 static struct macro_source_file
*
9390 macro_start_file (int file
, int line
,
9391 struct macro_source_file
*current_file
,
9392 const char *comp_dir
,
9393 struct line_header
*lh
, struct objfile
*objfile
)
9395 /* The full name of this source file. */
9396 char *full_name
= file_full_name (file
, lh
, comp_dir
);
9398 /* We don't create a macro table for this compilation unit
9399 at all until we actually get a filename. */
9400 if (! pending_macros
)
9401 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
9402 objfile
->macro_cache
);
9405 /* If we have no current file, then this must be the start_file
9406 directive for the compilation unit's main source file. */
9407 current_file
= macro_set_main (pending_macros
, full_name
);
9409 current_file
= macro_include (current_file
, line
, full_name
);
9413 return current_file
;
9417 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
9418 followed by a null byte. */
9420 copy_string (const char *buf
, int len
)
9422 char *s
= xmalloc (len
+ 1);
9423 memcpy (s
, buf
, len
);
9431 consume_improper_spaces (const char *p
, const char *body
)
9435 complaint (&symfile_complaints
,
9436 _("macro definition contains spaces in formal argument list:\n`%s'"),
9448 parse_macro_definition (struct macro_source_file
*file
, int line
,
9453 /* The body string takes one of two forms. For object-like macro
9454 definitions, it should be:
9456 <macro name> " " <definition>
9458 For function-like macro definitions, it should be:
9460 <macro name> "() " <definition>
9462 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
9464 Spaces may appear only where explicitly indicated, and in the
9467 The Dwarf 2 spec says that an object-like macro's name is always
9468 followed by a space, but versions of GCC around March 2002 omit
9469 the space when the macro's definition is the empty string.
9471 The Dwarf 2 spec says that there should be no spaces between the
9472 formal arguments in a function-like macro's formal argument list,
9473 but versions of GCC around March 2002 include spaces after the
9477 /* Find the extent of the macro name. The macro name is terminated
9478 by either a space or null character (for an object-like macro) or
9479 an opening paren (for a function-like macro). */
9480 for (p
= body
; *p
; p
++)
9481 if (*p
== ' ' || *p
== '(')
9484 if (*p
== ' ' || *p
== '\0')
9486 /* It's an object-like macro. */
9487 int name_len
= p
- body
;
9488 char *name
= copy_string (body
, name_len
);
9489 const char *replacement
;
9492 replacement
= body
+ name_len
+ 1;
9495 dwarf2_macro_malformed_definition_complaint (body
);
9496 replacement
= body
+ name_len
;
9499 macro_define_object (file
, line
, name
, replacement
);
9505 /* It's a function-like macro. */
9506 char *name
= copy_string (body
, p
- body
);
9509 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
9513 p
= consume_improper_spaces (p
, body
);
9515 /* Parse the formal argument list. */
9516 while (*p
&& *p
!= ')')
9518 /* Find the extent of the current argument name. */
9519 const char *arg_start
= p
;
9521 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
9524 if (! *p
|| p
== arg_start
)
9525 dwarf2_macro_malformed_definition_complaint (body
);
9528 /* Make sure argv has room for the new argument. */
9529 if (argc
>= argv_size
)
9532 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
9535 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
9538 p
= consume_improper_spaces (p
, body
);
9540 /* Consume the comma, if present. */
9545 p
= consume_improper_spaces (p
, body
);
9554 /* Perfectly formed definition, no complaints. */
9555 macro_define_function (file
, line
, name
,
9556 argc
, (const char **) argv
,
9558 else if (*p
== '\0')
9560 /* Complain, but do define it. */
9561 dwarf2_macro_malformed_definition_complaint (body
);
9562 macro_define_function (file
, line
, name
,
9563 argc
, (const char **) argv
,
9567 /* Just complain. */
9568 dwarf2_macro_malformed_definition_complaint (body
);
9571 /* Just complain. */
9572 dwarf2_macro_malformed_definition_complaint (body
);
9578 for (i
= 0; i
< argc
; i
++)
9584 dwarf2_macro_malformed_definition_complaint (body
);
9589 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
9590 char *comp_dir
, bfd
*abfd
,
9591 struct dwarf2_cu
*cu
)
9593 gdb_byte
*mac_ptr
, *mac_end
;
9594 struct macro_source_file
*current_file
= 0;
9596 if (dwarf2_per_objfile
->macinfo_buffer
== NULL
)
9598 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
9602 mac_ptr
= dwarf2_per_objfile
->macinfo_buffer
+ offset
;
9603 mac_end
= dwarf2_per_objfile
->macinfo_buffer
9604 + dwarf2_per_objfile
->macinfo_size
;
9608 enum dwarf_macinfo_record_type macinfo_type
;
9610 /* Do we at least have room for a macinfo type byte? */
9611 if (mac_ptr
>= mac_end
)
9613 dwarf2_macros_too_long_complaint ();
9617 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
9620 switch (macinfo_type
)
9622 /* A zero macinfo type indicates the end of the macro
9627 case DW_MACINFO_define
:
9628 case DW_MACINFO_undef
:
9630 unsigned int bytes_read
;
9634 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9635 mac_ptr
+= bytes_read
;
9636 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
9637 mac_ptr
+= bytes_read
;
9640 complaint (&symfile_complaints
,
9641 _("debug info gives macro %s outside of any file: %s"),
9643 DW_MACINFO_define
? "definition" : macinfo_type
==
9644 DW_MACINFO_undef
? "undefinition" :
9645 "something-or-other", body
);
9648 if (macinfo_type
== DW_MACINFO_define
)
9649 parse_macro_definition (current_file
, line
, body
);
9650 else if (macinfo_type
== DW_MACINFO_undef
)
9651 macro_undef (current_file
, line
, body
);
9656 case DW_MACINFO_start_file
:
9658 unsigned int bytes_read
;
9661 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9662 mac_ptr
+= bytes_read
;
9663 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9664 mac_ptr
+= bytes_read
;
9666 current_file
= macro_start_file (file
, line
,
9667 current_file
, comp_dir
,
9672 case DW_MACINFO_end_file
:
9674 complaint (&symfile_complaints
,
9675 _("macro debug info has an unmatched `close_file' directive"));
9678 current_file
= current_file
->included_by
;
9681 enum dwarf_macinfo_record_type next_type
;
9683 /* GCC circa March 2002 doesn't produce the zero
9684 type byte marking the end of the compilation
9685 unit. Complain if it's not there, but exit no
9688 /* Do we at least have room for a macinfo type byte? */
9689 if (mac_ptr
>= mac_end
)
9691 dwarf2_macros_too_long_complaint ();
9695 /* We don't increment mac_ptr here, so this is just
9697 next_type
= read_1_byte (abfd
, mac_ptr
);
9699 complaint (&symfile_complaints
,
9700 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
9707 case DW_MACINFO_vendor_ext
:
9709 unsigned int bytes_read
;
9713 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9714 mac_ptr
+= bytes_read
;
9715 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
9716 mac_ptr
+= bytes_read
;
9718 /* We don't recognize any vendor extensions. */
9725 /* Check if the attribute's form is a DW_FORM_block*
9726 if so return true else false. */
9728 attr_form_is_block (struct attribute
*attr
)
9730 return (attr
== NULL
? 0 :
9731 attr
->form
== DW_FORM_block1
9732 || attr
->form
== DW_FORM_block2
9733 || attr
->form
== DW_FORM_block4
9734 || attr
->form
== DW_FORM_block
);
9737 /* Return non-zero if ATTR's value is a section offset (classes
9738 lineptr, loclistptr, macptr or rangelistptr). In this case,
9739 you may use DW_UNSND (attr) to retrieve the offset. */
9741 attr_form_is_section_offset (struct attribute
*attr
)
9743 return (attr
->form
== DW_FORM_data4
9744 || attr
->form
== DW_FORM_data8
);
9748 /* Return non-zero if ATTR's value falls in the 'constant' class, or
9749 zero otherwise. When this function returns true, you can apply
9750 dwarf2_get_attr_constant_value to it.
9752 However, note that for some attributes you must check
9753 attr_form_is_section_offset before using this test. DW_FORM_data4
9754 and DW_FORM_data8 are members of both the constant class, and of
9755 the classes that contain offsets into other debug sections
9756 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
9757 that, if an attribute's can be either a constant or one of the
9758 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
9759 taken as section offsets, not constants. */
9761 attr_form_is_constant (struct attribute
*attr
)
9778 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
9779 struct dwarf2_cu
*cu
)
9781 struct objfile
*objfile
= cu
->objfile
;
9783 /* Save the master objfile, so that we can report and look up the
9784 correct file containing this variable. */
9785 if (objfile
->separate_debug_objfile_backlink
)
9786 objfile
= objfile
->separate_debug_objfile_backlink
;
9788 if (attr_form_is_section_offset (attr
)
9789 /* ".debug_loc" may not exist at all, or the offset may be outside
9790 the section. If so, fall through to the complaint in the
9792 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc_size
)
9794 struct dwarf2_loclist_baton
*baton
;
9796 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9797 sizeof (struct dwarf2_loclist_baton
));
9798 baton
->objfile
= objfile
;
9800 /* We don't know how long the location list is, but make sure we
9801 don't run off the edge of the section. */
9802 baton
->size
= dwarf2_per_objfile
->loc_size
- DW_UNSND (attr
);
9803 baton
->data
= dwarf2_per_objfile
->loc_buffer
+ DW_UNSND (attr
);
9804 baton
->base_address
= cu
->header
.base_address
;
9805 if (cu
->header
.base_known
== 0)
9806 complaint (&symfile_complaints
,
9807 _("Location list used without specifying the CU base address."));
9809 SYMBOL_OPS (sym
) = &dwarf2_loclist_funcs
;
9810 SYMBOL_LOCATION_BATON (sym
) = baton
;
9814 struct dwarf2_locexpr_baton
*baton
;
9816 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9817 sizeof (struct dwarf2_locexpr_baton
));
9818 baton
->objfile
= objfile
;
9820 if (attr_form_is_block (attr
))
9822 /* Note that we're just copying the block's data pointer
9823 here, not the actual data. We're still pointing into the
9824 info_buffer for SYM's objfile; right now we never release
9825 that buffer, but when we do clean up properly this may
9827 baton
->size
= DW_BLOCK (attr
)->size
;
9828 baton
->data
= DW_BLOCK (attr
)->data
;
9832 dwarf2_invalid_attrib_class_complaint ("location description",
9833 SYMBOL_NATURAL_NAME (sym
));
9838 SYMBOL_OPS (sym
) = &dwarf2_locexpr_funcs
;
9839 SYMBOL_LOCATION_BATON (sym
) = baton
;
9843 /* Locate the compilation unit from CU's objfile which contains the
9844 DIE at OFFSET. Raises an error on failure. */
9846 static struct dwarf2_per_cu_data
*
9847 dwarf2_find_containing_comp_unit (unsigned long offset
,
9848 struct objfile
*objfile
)
9850 struct dwarf2_per_cu_data
*this_cu
;
9854 high
= dwarf2_per_objfile
->n_comp_units
- 1;
9857 int mid
= low
+ (high
- low
) / 2;
9858 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
9863 gdb_assert (low
== high
);
9864 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
9867 error (_("Dwarf Error: could not find partial DIE containing "
9868 "offset 0x%lx [in module %s]"),
9869 (long) offset
, bfd_get_filename (objfile
->obfd
));
9871 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
9872 return dwarf2_per_objfile
->all_comp_units
[low
-1];
9876 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
9877 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
9878 && offset
>= this_cu
->offset
+ this_cu
->length
)
9879 error (_("invalid dwarf2 offset %ld"), offset
);
9880 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
9885 /* Locate the compilation unit from OBJFILE which is located at exactly
9886 OFFSET. Raises an error on failure. */
9888 static struct dwarf2_per_cu_data
*
9889 dwarf2_find_comp_unit (unsigned long offset
, struct objfile
*objfile
)
9891 struct dwarf2_per_cu_data
*this_cu
;
9892 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
9893 if (this_cu
->offset
!= offset
)
9894 error (_("no compilation unit with offset %ld."), offset
);
9898 /* Release one cached compilation unit, CU. We unlink it from the tree
9899 of compilation units, but we don't remove it from the read_in_chain;
9900 the caller is responsible for that. */
9903 free_one_comp_unit (void *data
)
9905 struct dwarf2_cu
*cu
= data
;
9907 if (cu
->per_cu
!= NULL
)
9908 cu
->per_cu
->cu
= NULL
;
9911 obstack_free (&cu
->comp_unit_obstack
, NULL
);
9913 free_die_list (cu
->dies
);
9918 /* This cleanup function is passed the address of a dwarf2_cu on the stack
9919 when we're finished with it. We can't free the pointer itself, but be
9920 sure to unlink it from the cache. Also release any associated storage
9921 and perform cache maintenance.
9923 Only used during partial symbol parsing. */
9926 free_stack_comp_unit (void *data
)
9928 struct dwarf2_cu
*cu
= data
;
9930 obstack_free (&cu
->comp_unit_obstack
, NULL
);
9931 cu
->partial_dies
= NULL
;
9933 if (cu
->per_cu
!= NULL
)
9935 /* This compilation unit is on the stack in our caller, so we
9936 should not xfree it. Just unlink it. */
9937 cu
->per_cu
->cu
= NULL
;
9940 /* If we had a per-cu pointer, then we may have other compilation
9941 units loaded, so age them now. */
9942 age_cached_comp_units ();
9946 /* Free all cached compilation units. */
9949 free_cached_comp_units (void *data
)
9951 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9953 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9954 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9955 while (per_cu
!= NULL
)
9957 struct dwarf2_per_cu_data
*next_cu
;
9959 next_cu
= per_cu
->cu
->read_in_chain
;
9961 free_one_comp_unit (per_cu
->cu
);
9962 *last_chain
= next_cu
;
9968 /* Increase the age counter on each cached compilation unit, and free
9969 any that are too old. */
9972 age_cached_comp_units (void)
9974 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9976 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
9977 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9978 while (per_cu
!= NULL
)
9980 per_cu
->cu
->last_used
++;
9981 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
9982 dwarf2_mark (per_cu
->cu
);
9983 per_cu
= per_cu
->cu
->read_in_chain
;
9986 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9987 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9988 while (per_cu
!= NULL
)
9990 struct dwarf2_per_cu_data
*next_cu
;
9992 next_cu
= per_cu
->cu
->read_in_chain
;
9994 if (!per_cu
->cu
->mark
)
9996 free_one_comp_unit (per_cu
->cu
);
9997 *last_chain
= next_cu
;
10000 last_chain
= &per_cu
->cu
->read_in_chain
;
10006 /* Remove a single compilation unit from the cache. */
10009 free_one_cached_comp_unit (void *target_cu
)
10011 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
10013 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10014 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10015 while (per_cu
!= NULL
)
10017 struct dwarf2_per_cu_data
*next_cu
;
10019 next_cu
= per_cu
->cu
->read_in_chain
;
10021 if (per_cu
->cu
== target_cu
)
10023 free_one_comp_unit (per_cu
->cu
);
10024 *last_chain
= next_cu
;
10028 last_chain
= &per_cu
->cu
->read_in_chain
;
10034 /* Release all extra memory associated with OBJFILE. */
10037 dwarf2_free_objfile (struct objfile
*objfile
)
10039 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
10041 if (dwarf2_per_objfile
== NULL
)
10044 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
10045 free_cached_comp_units (NULL
);
10047 /* Everything else should be on the objfile obstack. */
10050 /* A pair of DIE offset and GDB type pointer. We store these
10051 in a hash table separate from the DIEs, and preserve them
10052 when the DIEs are flushed out of cache. */
10054 struct dwarf2_offset_and_type
10056 unsigned int offset
;
10060 /* Hash function for a dwarf2_offset_and_type. */
10063 offset_and_type_hash (const void *item
)
10065 const struct dwarf2_offset_and_type
*ofs
= item
;
10066 return ofs
->offset
;
10069 /* Equality function for a dwarf2_offset_and_type. */
10072 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
10074 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
10075 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
10076 return ofs_lhs
->offset
== ofs_rhs
->offset
;
10079 /* Set the type associated with DIE to TYPE. Save it in CU's hash
10080 table if necessary. */
10083 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
10085 struct dwarf2_offset_and_type
**slot
, ofs
;
10089 if (cu
->per_cu
== NULL
)
10092 if (cu
->per_cu
->type_hash
== NULL
)
10093 cu
->per_cu
->type_hash
10094 = htab_create_alloc_ex (cu
->header
.length
/ 24,
10095 offset_and_type_hash
,
10096 offset_and_type_eq
,
10098 &cu
->objfile
->objfile_obstack
,
10099 hashtab_obstack_allocate
,
10100 dummy_obstack_deallocate
);
10102 ofs
.offset
= die
->offset
;
10104 slot
= (struct dwarf2_offset_and_type
**)
10105 htab_find_slot_with_hash (cu
->per_cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
10106 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
10110 /* Find the type for DIE in TYPE_HASH, or return NULL if DIE does not
10111 have a saved type. */
10113 static struct type
*
10114 get_die_type (struct die_info
*die
, htab_t type_hash
)
10116 struct dwarf2_offset_and_type
*slot
, ofs
;
10118 ofs
.offset
= die
->offset
;
10119 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
10126 /* Restore the types of the DIE tree starting at START_DIE from the hash
10127 table saved in CU. */
10130 reset_die_and_siblings_types (struct die_info
*start_die
, struct dwarf2_cu
*cu
)
10132 struct die_info
*die
;
10134 if (cu
->per_cu
->type_hash
== NULL
)
10137 for (die
= start_die
; die
!= NULL
; die
= die
->sibling
)
10139 die
->type
= get_die_type (die
, cu
->per_cu
->type_hash
);
10140 if (die
->child
!= NULL
)
10141 reset_die_and_siblings_types (die
->child
, cu
);
10145 /* Set the mark field in CU and in every other compilation unit in the
10146 cache that we must keep because we are keeping CU. */
10148 /* Add a dependence relationship from CU to REF_PER_CU. */
10151 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
10152 struct dwarf2_per_cu_data
*ref_per_cu
)
10156 if (cu
->dependencies
== NULL
)
10158 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
10159 NULL
, &cu
->comp_unit_obstack
,
10160 hashtab_obstack_allocate
,
10161 dummy_obstack_deallocate
);
10163 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
10165 *slot
= ref_per_cu
;
10168 /* Set the mark field in CU and in every other compilation unit in the
10169 cache that we must keep because we are keeping CU. */
10172 dwarf2_mark_helper (void **slot
, void *data
)
10174 struct dwarf2_per_cu_data
*per_cu
;
10176 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
10177 if (per_cu
->cu
->mark
)
10179 per_cu
->cu
->mark
= 1;
10181 if (per_cu
->cu
->dependencies
!= NULL
)
10182 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10188 dwarf2_mark (struct dwarf2_cu
*cu
)
10193 if (cu
->dependencies
!= NULL
)
10194 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10198 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
10202 per_cu
->cu
->mark
= 0;
10203 per_cu
= per_cu
->cu
->read_in_chain
;
10207 /* Trivial hash function for partial_die_info: the hash value of a DIE
10208 is its offset in .debug_info for this objfile. */
10211 partial_die_hash (const void *item
)
10213 const struct partial_die_info
*part_die
= item
;
10214 return part_die
->offset
;
10217 /* Trivial comparison function for partial_die_info structures: two DIEs
10218 are equal if they have the same offset. */
10221 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
10223 const struct partial_die_info
*part_die_lhs
= item_lhs
;
10224 const struct partial_die_info
*part_die_rhs
= item_rhs
;
10225 return part_die_lhs
->offset
== part_die_rhs
->offset
;
10228 static struct cmd_list_element
*set_dwarf2_cmdlist
;
10229 static struct cmd_list_element
*show_dwarf2_cmdlist
;
10232 set_dwarf2_cmd (char *args
, int from_tty
)
10234 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
10238 show_dwarf2_cmd (char *args
, int from_tty
)
10240 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
10243 void _initialize_dwarf2_read (void);
10246 _initialize_dwarf2_read (void)
10248 dwarf2_objfile_data_key
= register_objfile_data ();
10250 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
10251 Set DWARF 2 specific variables.\n\
10252 Configure DWARF 2 variables such as the cache size"),
10253 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
10254 0/*allow-unknown*/, &maintenance_set_cmdlist
);
10256 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
10257 Show DWARF 2 specific variables\n\
10258 Show DWARF 2 variables such as the cache size"),
10259 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
10260 0/*allow-unknown*/, &maintenance_show_cmdlist
);
10262 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
10263 &dwarf2_max_cache_age
, _("\
10264 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
10265 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
10266 A higher limit means that cached compilation units will be stored\n\
10267 in memory longer, and more total memory will be used. Zero disables\n\
10268 caching, which can slow down startup."),
10270 show_dwarf2_max_cache_age
,
10271 &set_dwarf2_cmdlist
,
10272 &show_dwarf2_cmdlist
);