1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
6 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
7 Inc. with support from Florida State University (under contract
8 with the Ada Joint Program Office), and Silicon Graphics, Inc.
9 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
10 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
13 This file is part of GDB.
15 This program is free software; you can redistribute it and/or modify
16 it under the terms of the GNU General Public License as published by
17 the Free Software Foundation; either version 3 of the License, or
18 (at your option) any later version.
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
25 You should have received a copy of the GNU General Public License
26 along with this program. If not, see <http://www.gnu.org/licenses/>. */
33 #include "elf/dwarf2.h"
36 #include "expression.h"
37 #include "filenames.h" /* for DOSish file names */
40 #include "complaints.h"
42 #include "dwarf2expr.h"
43 #include "dwarf2loc.h"
44 #include "cp-support.h"
50 #include "gdb_string.h"
51 #include "gdb_assert.h"
52 #include <sys/types.h>
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_interface_type
:
1751 case DW_TAG_structure_type
:
1752 if (!pdi
->is_declaration
)
1754 add_partial_symbol (pdi
, cu
);
1757 case DW_TAG_enumeration_type
:
1758 if (!pdi
->is_declaration
)
1759 add_partial_enumeration (pdi
, cu
);
1761 case DW_TAG_base_type
:
1762 case DW_TAG_subrange_type
:
1763 /* File scope base type definitions are added to the partial
1765 add_partial_symbol (pdi
, cu
);
1767 case DW_TAG_namespace
:
1768 add_partial_namespace (pdi
, lowpc
, highpc
, cu
);
1775 /* If the die has a sibling, skip to the sibling. */
1777 pdi
= pdi
->die_sibling
;
1781 /* Functions used to compute the fully scoped name of a partial DIE.
1783 Normally, this is simple. For C++, the parent DIE's fully scoped
1784 name is concatenated with "::" and the partial DIE's name. For
1785 Java, the same thing occurs except that "." is used instead of "::".
1786 Enumerators are an exception; they use the scope of their parent
1787 enumeration type, i.e. the name of the enumeration type is not
1788 prepended to the enumerator.
1790 There are two complexities. One is DW_AT_specification; in this
1791 case "parent" means the parent of the target of the specification,
1792 instead of the direct parent of the DIE. The other is compilers
1793 which do not emit DW_TAG_namespace; in this case we try to guess
1794 the fully qualified name of structure types from their members'
1795 linkage names. This must be done using the DIE's children rather
1796 than the children of any DW_AT_specification target. We only need
1797 to do this for structures at the top level, i.e. if the target of
1798 any DW_AT_specification (if any; otherwise the DIE itself) does not
1801 /* Compute the scope prefix associated with PDI's parent, in
1802 compilation unit CU. The result will be allocated on CU's
1803 comp_unit_obstack, or a copy of the already allocated PDI->NAME
1804 field. NULL is returned if no prefix is necessary. */
1806 partial_die_parent_scope (struct partial_die_info
*pdi
,
1807 struct dwarf2_cu
*cu
)
1809 char *grandparent_scope
;
1810 struct partial_die_info
*parent
, *real_pdi
;
1812 /* We need to look at our parent DIE; if we have a DW_AT_specification,
1813 then this means the parent of the specification DIE. */
1816 while (real_pdi
->has_specification
)
1817 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
1819 parent
= real_pdi
->die_parent
;
1823 if (parent
->scope_set
)
1824 return parent
->scope
;
1826 fixup_partial_die (parent
, cu
);
1828 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
1830 if (parent
->tag
== DW_TAG_namespace
1831 || parent
->tag
== DW_TAG_structure_type
1832 || parent
->tag
== DW_TAG_class_type
1833 || parent
->tag
== DW_TAG_interface_type
1834 || parent
->tag
== DW_TAG_union_type
)
1836 if (grandparent_scope
== NULL
)
1837 parent
->scope
= parent
->name
;
1839 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
1842 else if (parent
->tag
== DW_TAG_enumeration_type
)
1843 /* Enumerators should not get the name of the enumeration as a prefix. */
1844 parent
->scope
= grandparent_scope
;
1847 /* FIXME drow/2004-04-01: What should we be doing with
1848 function-local names? For partial symbols, we should probably be
1850 complaint (&symfile_complaints
,
1851 _("unhandled containing DIE tag %d for DIE at %d"),
1852 parent
->tag
, pdi
->offset
);
1853 parent
->scope
= grandparent_scope
;
1856 parent
->scope_set
= 1;
1857 return parent
->scope
;
1860 /* Return the fully scoped name associated with PDI, from compilation unit
1861 CU. The result will be allocated with malloc. */
1863 partial_die_full_name (struct partial_die_info
*pdi
,
1864 struct dwarf2_cu
*cu
)
1868 parent_scope
= partial_die_parent_scope (pdi
, cu
);
1869 if (parent_scope
== NULL
)
1872 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
1876 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
1878 struct objfile
*objfile
= cu
->objfile
;
1880 char *actual_name
= NULL
;
1881 const char *my_prefix
;
1882 const struct partial_symbol
*psym
= NULL
;
1884 int built_actual_name
= 0;
1886 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1888 if (pdi_needs_namespace (pdi
->tag
))
1890 actual_name
= partial_die_full_name (pdi
, cu
);
1892 built_actual_name
= 1;
1895 if (actual_name
== NULL
)
1896 actual_name
= pdi
->name
;
1900 case DW_TAG_subprogram
:
1901 if (pdi
->is_external
)
1903 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1904 mst_text, objfile); */
1905 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1906 VAR_DOMAIN
, LOC_BLOCK
,
1907 &objfile
->global_psymbols
,
1908 0, pdi
->lowpc
+ baseaddr
,
1909 cu
->language
, objfile
);
1913 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1914 mst_file_text, objfile); */
1915 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1916 VAR_DOMAIN
, LOC_BLOCK
,
1917 &objfile
->static_psymbols
,
1918 0, pdi
->lowpc
+ baseaddr
,
1919 cu
->language
, objfile
);
1922 case DW_TAG_variable
:
1923 if (pdi
->is_external
)
1926 Don't enter into the minimal symbol tables as there is
1927 a minimal symbol table entry from the ELF symbols already.
1928 Enter into partial symbol table if it has a location
1929 descriptor or a type.
1930 If the location descriptor is missing, new_symbol will create
1931 a LOC_UNRESOLVED symbol, the address of the variable will then
1932 be determined from the minimal symbol table whenever the variable
1934 The address for the partial symbol table entry is not
1935 used by GDB, but it comes in handy for debugging partial symbol
1939 addr
= decode_locdesc (pdi
->locdesc
, cu
);
1940 if (pdi
->locdesc
|| pdi
->has_type
)
1941 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1942 VAR_DOMAIN
, LOC_STATIC
,
1943 &objfile
->global_psymbols
,
1945 cu
->language
, objfile
);
1949 /* Static Variable. Skip symbols without location descriptors. */
1950 if (pdi
->locdesc
== NULL
)
1952 if (built_actual_name
)
1953 xfree (actual_name
);
1956 addr
= decode_locdesc (pdi
->locdesc
, cu
);
1957 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
1958 mst_file_data, objfile); */
1959 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1960 VAR_DOMAIN
, LOC_STATIC
,
1961 &objfile
->static_psymbols
,
1963 cu
->language
, objfile
);
1966 case DW_TAG_typedef
:
1967 case DW_TAG_base_type
:
1968 case DW_TAG_subrange_type
:
1969 add_psymbol_to_list (actual_name
, strlen (actual_name
),
1970 VAR_DOMAIN
, LOC_TYPEDEF
,
1971 &objfile
->static_psymbols
,
1972 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
1974 case DW_TAG_namespace
:
1975 add_psymbol_to_list (actual_name
, strlen (actual_name
),
1976 VAR_DOMAIN
, LOC_TYPEDEF
,
1977 &objfile
->global_psymbols
,
1978 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
1980 case DW_TAG_class_type
:
1981 case DW_TAG_interface_type
:
1982 case DW_TAG_structure_type
:
1983 case DW_TAG_union_type
:
1984 case DW_TAG_enumeration_type
:
1985 /* Skip external references. The DWARF standard says in the section
1986 about "Structure, Union, and Class Type Entries": "An incomplete
1987 structure, union or class type is represented by a structure,
1988 union or class entry that does not have a byte size attribute
1989 and that has a DW_AT_declaration attribute." */
1990 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
1992 if (built_actual_name
)
1993 xfree (actual_name
);
1997 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
1998 static vs. global. */
1999 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2000 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2001 (cu
->language
== language_cplus
2002 || cu
->language
== language_java
)
2003 ? &objfile
->global_psymbols
2004 : &objfile
->static_psymbols
,
2005 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2007 if (cu
->language
== language_cplus
2008 || cu
->language
== language_java
2009 || cu
->language
== language_ada
)
2011 /* For C++ and Java, these implicitly act as typedefs as well. */
2012 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2013 VAR_DOMAIN
, LOC_TYPEDEF
,
2014 &objfile
->global_psymbols
,
2015 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2018 case DW_TAG_enumerator
:
2019 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2020 VAR_DOMAIN
, LOC_CONST
,
2021 (cu
->language
== language_cplus
2022 || cu
->language
== language_java
)
2023 ? &objfile
->global_psymbols
2024 : &objfile
->static_psymbols
,
2025 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2031 /* Check to see if we should scan the name for possible namespace
2032 info. Only do this if this is C++, if we don't have namespace
2033 debugging info in the file, if the psym is of an appropriate type
2034 (otherwise we'll have psym == NULL), and if we actually had a
2035 mangled name to begin with. */
2037 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2038 cases which do not set PSYM above? */
2040 if (cu
->language
== language_cplus
2041 && cu
->has_namespace_info
== 0
2043 && SYMBOL_CPLUS_DEMANGLED_NAME (psym
) != NULL
)
2044 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym
),
2047 if (built_actual_name
)
2048 xfree (actual_name
);
2051 /* Determine whether a die of type TAG living in a C++ class or
2052 namespace needs to have the name of the scope prepended to the
2053 name listed in the die. */
2056 pdi_needs_namespace (enum dwarf_tag tag
)
2060 case DW_TAG_namespace
:
2061 case DW_TAG_typedef
:
2062 case DW_TAG_class_type
:
2063 case DW_TAG_interface_type
:
2064 case DW_TAG_structure_type
:
2065 case DW_TAG_union_type
:
2066 case DW_TAG_enumeration_type
:
2067 case DW_TAG_enumerator
:
2074 /* Read a partial die corresponding to a namespace; also, add a symbol
2075 corresponding to that namespace to the symbol table. NAMESPACE is
2076 the name of the enclosing namespace. */
2079 add_partial_namespace (struct partial_die_info
*pdi
,
2080 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2081 struct dwarf2_cu
*cu
)
2083 struct objfile
*objfile
= cu
->objfile
;
2085 /* Add a symbol for the namespace. */
2087 add_partial_symbol (pdi
, cu
);
2089 /* Now scan partial symbols in that namespace. */
2091 if (pdi
->has_children
)
2092 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, cu
);
2095 /* See if we can figure out if the class lives in a namespace. We do
2096 this by looking for a member function; its demangled name will
2097 contain namespace info, if there is any. */
2100 guess_structure_name (struct partial_die_info
*struct_pdi
,
2101 struct dwarf2_cu
*cu
)
2103 if ((cu
->language
== language_cplus
2104 || cu
->language
== language_java
)
2105 && cu
->has_namespace_info
== 0
2106 && struct_pdi
->has_children
)
2108 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2109 what template types look like, because the demangler
2110 frequently doesn't give the same name as the debug info. We
2111 could fix this by only using the demangled name to get the
2112 prefix (but see comment in read_structure_type). */
2114 struct partial_die_info
*child_pdi
= struct_pdi
->die_child
;
2115 struct partial_die_info
*real_pdi
;
2117 /* If this DIE (this DIE's specification, if any) has a parent, then
2118 we should not do this. We'll prepend the parent's fully qualified
2119 name when we create the partial symbol. */
2121 real_pdi
= struct_pdi
;
2122 while (real_pdi
->has_specification
)
2123 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2125 if (real_pdi
->die_parent
!= NULL
)
2128 while (child_pdi
!= NULL
)
2130 if (child_pdi
->tag
== DW_TAG_subprogram
)
2132 char *actual_class_name
2133 = language_class_name_from_physname (cu
->language_defn
,
2135 if (actual_class_name
!= NULL
)
2138 = obsavestring (actual_class_name
,
2139 strlen (actual_class_name
),
2140 &cu
->comp_unit_obstack
);
2141 xfree (actual_class_name
);
2146 child_pdi
= child_pdi
->die_sibling
;
2151 /* Read a partial die corresponding to an enumeration type. */
2154 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2155 struct dwarf2_cu
*cu
)
2157 struct objfile
*objfile
= cu
->objfile
;
2158 bfd
*abfd
= objfile
->obfd
;
2159 struct partial_die_info
*pdi
;
2161 if (enum_pdi
->name
!= NULL
)
2162 add_partial_symbol (enum_pdi
, cu
);
2164 pdi
= enum_pdi
->die_child
;
2167 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2168 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2170 add_partial_symbol (pdi
, cu
);
2171 pdi
= pdi
->die_sibling
;
2175 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2176 Return the corresponding abbrev, or NULL if the number is zero (indicating
2177 an empty DIE). In either case *BYTES_READ will be set to the length of
2178 the initial number. */
2180 static struct abbrev_info
*
2181 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2182 struct dwarf2_cu
*cu
)
2184 bfd
*abfd
= cu
->objfile
->obfd
;
2185 unsigned int abbrev_number
;
2186 struct abbrev_info
*abbrev
;
2188 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2190 if (abbrev_number
== 0)
2193 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2196 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2197 bfd_get_filename (abfd
));
2203 /* Scan the debug information for CU starting at INFO_PTR. Returns a
2204 pointer to the end of a series of DIEs, terminated by an empty
2205 DIE. Any children of the skipped DIEs will also be skipped. */
2208 skip_children (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2210 struct abbrev_info
*abbrev
;
2211 unsigned int bytes_read
;
2215 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2217 return info_ptr
+ bytes_read
;
2219 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
2223 /* Scan the debug information for CU starting at INFO_PTR. INFO_PTR
2224 should point just after the initial uleb128 of a DIE, and the
2225 abbrev corresponding to that skipped uleb128 should be passed in
2226 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2230 skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
2231 struct dwarf2_cu
*cu
)
2233 unsigned int bytes_read
;
2234 struct attribute attr
;
2235 bfd
*abfd
= cu
->objfile
->obfd
;
2236 unsigned int form
, i
;
2238 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2240 /* The only abbrev we care about is DW_AT_sibling. */
2241 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2243 read_attribute (&attr
, &abbrev
->attrs
[i
],
2244 abfd
, info_ptr
, cu
);
2245 if (attr
.form
== DW_FORM_ref_addr
)
2246 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2248 return dwarf2_per_objfile
->info_buffer
2249 + dwarf2_get_ref_die_offset (&attr
, cu
);
2252 /* If it isn't DW_AT_sibling, skip this attribute. */
2253 form
= abbrev
->attrs
[i
].form
;
2258 case DW_FORM_ref_addr
:
2259 info_ptr
+= cu
->header
.addr_size
;
2278 case DW_FORM_string
:
2279 read_string (abfd
, info_ptr
, &bytes_read
);
2280 info_ptr
+= bytes_read
;
2283 info_ptr
+= cu
->header
.offset_size
;
2286 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2287 info_ptr
+= bytes_read
;
2289 case DW_FORM_block1
:
2290 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2292 case DW_FORM_block2
:
2293 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2295 case DW_FORM_block4
:
2296 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2300 case DW_FORM_ref_udata
:
2301 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2303 case DW_FORM_indirect
:
2304 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2305 info_ptr
+= bytes_read
;
2306 /* We need to continue parsing from here, so just go back to
2308 goto skip_attribute
;
2311 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2312 dwarf_form_name (form
),
2313 bfd_get_filename (abfd
));
2317 if (abbrev
->has_children
)
2318 return skip_children (info_ptr
, cu
);
2323 /* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of
2324 the next DIE after ORIG_PDI. */
2327 locate_pdi_sibling (struct partial_die_info
*orig_pdi
, gdb_byte
*info_ptr
,
2328 bfd
*abfd
, struct dwarf2_cu
*cu
)
2330 /* Do we know the sibling already? */
2332 if (orig_pdi
->sibling
)
2333 return orig_pdi
->sibling
;
2335 /* Are there any children to deal with? */
2337 if (!orig_pdi
->has_children
)
2340 /* Skip the children the long way. */
2342 return skip_children (info_ptr
, cu
);
2345 /* Expand this partial symbol table into a full symbol table. */
2348 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2350 /* FIXME: This is barely more than a stub. */
2355 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2361 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2362 gdb_flush (gdb_stdout
);
2365 /* Restore our global data. */
2366 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2367 dwarf2_objfile_data_key
);
2369 psymtab_to_symtab_1 (pst
);
2371 /* Finish up the debug error message. */
2373 printf_filtered (_("done.\n"));
2378 /* Add PER_CU to the queue. */
2381 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2383 struct dwarf2_queue_item
*item
;
2386 item
= xmalloc (sizeof (*item
));
2387 item
->per_cu
= per_cu
;
2390 if (dwarf2_queue
== NULL
)
2391 dwarf2_queue
= item
;
2393 dwarf2_queue_tail
->next
= item
;
2395 dwarf2_queue_tail
= item
;
2398 /* Process the queue. */
2401 process_queue (struct objfile
*objfile
)
2403 struct dwarf2_queue_item
*item
, *next_item
;
2405 /* Initially, there is just one item on the queue. Load its DIEs,
2406 and the DIEs of any other compilation units it requires,
2409 for (item
= dwarf2_queue
; item
!= NULL
; item
= item
->next
)
2411 /* Read in this compilation unit. This may add new items to
2412 the end of the queue. */
2413 load_full_comp_unit (item
->per_cu
, objfile
);
2415 item
->per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
2416 dwarf2_per_objfile
->read_in_chain
= item
->per_cu
;
2418 /* If this compilation unit has already had full symbols created,
2419 reset the TYPE fields in each DIE. */
2420 if (item
->per_cu
->type_hash
)
2421 reset_die_and_siblings_types (item
->per_cu
->cu
->dies
,
2425 /* Now everything left on the queue needs to be read in. Process
2426 them, one at a time, removing from the queue as we finish. */
2427 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
2429 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
2430 process_full_comp_unit (item
->per_cu
);
2432 item
->per_cu
->queued
= 0;
2433 next_item
= item
->next
;
2437 dwarf2_queue_tail
= NULL
;
2440 /* Free all allocated queue entries. This function only releases anything if
2441 an error was thrown; if the queue was processed then it would have been
2442 freed as we went along. */
2445 dwarf2_release_queue (void *dummy
)
2447 struct dwarf2_queue_item
*item
, *last
;
2449 item
= dwarf2_queue
;
2452 /* Anything still marked queued is likely to be in an
2453 inconsistent state, so discard it. */
2454 if (item
->per_cu
->queued
)
2456 if (item
->per_cu
->cu
!= NULL
)
2457 free_one_cached_comp_unit (item
->per_cu
->cu
);
2458 item
->per_cu
->queued
= 0;
2466 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
2469 /* Read in full symbols for PST, and anything it depends on. */
2472 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2474 struct dwarf2_per_cu_data
*per_cu
;
2475 struct cleanup
*back_to
;
2478 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2479 if (!pst
->dependencies
[i
]->readin
)
2481 /* Inform about additional files that need to be read in. */
2484 /* FIXME: i18n: Need to make this a single string. */
2485 fputs_filtered (" ", gdb_stdout
);
2487 fputs_filtered ("and ", gdb_stdout
);
2489 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2490 wrap_here (""); /* Flush output */
2491 gdb_flush (gdb_stdout
);
2493 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2496 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
2500 /* It's an include file, no symbols to read for it.
2501 Everything is in the parent symtab. */
2506 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2508 queue_comp_unit (per_cu
);
2510 process_queue (pst
->objfile
);
2512 /* Age the cache, releasing compilation units that have not
2513 been used recently. */
2514 age_cached_comp_units ();
2516 do_cleanups (back_to
);
2519 /* Load the DIEs associated with PST and PER_CU into memory. */
2521 static struct dwarf2_cu
*
2522 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2524 bfd
*abfd
= objfile
->obfd
;
2525 struct dwarf2_cu
*cu
;
2526 unsigned long offset
;
2528 struct cleanup
*back_to
, *free_cu_cleanup
;
2529 struct attribute
*attr
;
2532 /* Set local variables from the partial symbol table info. */
2533 offset
= per_cu
->offset
;
2535 info_ptr
= dwarf2_per_objfile
->info_buffer
+ offset
;
2537 cu
= xmalloc (sizeof (struct dwarf2_cu
));
2538 memset (cu
, 0, sizeof (struct dwarf2_cu
));
2540 /* If an error occurs while loading, release our storage. */
2541 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
2543 cu
->objfile
= objfile
;
2545 /* read in the comp_unit header */
2546 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
2548 /* Read the abbrevs for this compilation unit */
2549 dwarf2_read_abbrevs (abfd
, cu
);
2550 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2552 cu
->header
.offset
= offset
;
2554 cu
->per_cu
= per_cu
;
2557 /* We use this obstack for block values in dwarf_alloc_block. */
2558 obstack_init (&cu
->comp_unit_obstack
);
2560 cu
->dies
= read_comp_unit (info_ptr
, abfd
, cu
);
2562 /* We try not to read any attributes in this function, because not
2563 all objfiles needed for references have been loaded yet, and symbol
2564 table processing isn't initialized. But we have to set the CU language,
2565 or we won't be able to build types correctly. */
2566 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
2568 set_cu_language (DW_UNSND (attr
), cu
);
2570 set_cu_language (language_minimal
, cu
);
2572 do_cleanups (back_to
);
2574 /* We've successfully allocated this compilation unit. Let our caller
2575 clean it up when finished with it. */
2576 discard_cleanups (free_cu_cleanup
);
2581 /* Generate full symbol information for PST and CU, whose DIEs have
2582 already been loaded into memory. */
2585 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2587 struct partial_symtab
*pst
= per_cu
->psymtab
;
2588 struct dwarf2_cu
*cu
= per_cu
->cu
;
2589 struct objfile
*objfile
= pst
->objfile
;
2590 bfd
*abfd
= objfile
->obfd
;
2591 CORE_ADDR lowpc
, highpc
;
2592 struct symtab
*symtab
;
2593 struct cleanup
*back_to
;
2594 struct attribute
*attr
;
2597 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2599 /* We're in the global namespace. */
2600 processing_current_prefix
= "";
2603 back_to
= make_cleanup (really_free_pendings
, NULL
);
2605 cu
->list_in_scope
= &file_symbols
;
2607 /* Find the base address of the compilation unit for range lists and
2608 location lists. It will normally be specified by DW_AT_low_pc.
2609 In DWARF-3 draft 4, the base address could be overridden by
2610 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2611 compilation units with discontinuous ranges. */
2613 cu
->header
.base_known
= 0;
2614 cu
->header
.base_address
= 0;
2616 attr
= dwarf2_attr (cu
->dies
, DW_AT_entry_pc
, cu
);
2619 cu
->header
.base_address
= DW_ADDR (attr
);
2620 cu
->header
.base_known
= 1;
2624 attr
= dwarf2_attr (cu
->dies
, DW_AT_low_pc
, cu
);
2627 cu
->header
.base_address
= DW_ADDR (attr
);
2628 cu
->header
.base_known
= 1;
2632 /* Do line number decoding in read_file_scope () */
2633 process_die (cu
->dies
, cu
);
2635 /* Some compilers don't define a DW_AT_high_pc attribute for the
2636 compilation unit. If the DW_AT_high_pc is missing, synthesize
2637 it, by scanning the DIE's below the compilation unit. */
2638 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
2640 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
2642 /* Set symtab language to language from DW_AT_language.
2643 If the compilation is from a C file generated by language preprocessors,
2644 do not set the language if it was already deduced by start_subfile. */
2646 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
2648 symtab
->language
= cu
->language
;
2650 pst
->symtab
= symtab
;
2653 do_cleanups (back_to
);
2656 /* Process a die and its children. */
2659 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
2663 case DW_TAG_padding
:
2665 case DW_TAG_compile_unit
:
2666 read_file_scope (die
, cu
);
2668 case DW_TAG_subprogram
:
2669 read_subroutine_type (die
, cu
);
2670 read_func_scope (die
, cu
);
2672 case DW_TAG_inlined_subroutine
:
2673 /* FIXME: These are ignored for now.
2674 They could be used to set breakpoints on all inlined instances
2675 of a function and make GDB `next' properly over inlined functions. */
2677 case DW_TAG_lexical_block
:
2678 case DW_TAG_try_block
:
2679 case DW_TAG_catch_block
:
2680 read_lexical_block_scope (die
, cu
);
2682 case DW_TAG_class_type
:
2683 case DW_TAG_interface_type
:
2684 case DW_TAG_structure_type
:
2685 case DW_TAG_union_type
:
2686 read_structure_type (die
, cu
);
2687 process_structure_scope (die
, cu
);
2689 case DW_TAG_enumeration_type
:
2690 read_enumeration_type (die
, cu
);
2691 process_enumeration_scope (die
, cu
);
2694 /* FIXME drow/2004-03-14: These initialize die->type, but do not create
2695 a symbol or process any children. Therefore it doesn't do anything
2696 that won't be done on-demand by read_type_die. */
2697 case DW_TAG_subroutine_type
:
2698 read_subroutine_type (die
, cu
);
2700 case DW_TAG_set_type
:
2701 read_set_type (die
, cu
);
2703 case DW_TAG_array_type
:
2704 read_array_type (die
, cu
);
2706 case DW_TAG_pointer_type
:
2707 read_tag_pointer_type (die
, cu
);
2709 case DW_TAG_ptr_to_member_type
:
2710 read_tag_ptr_to_member_type (die
, cu
);
2712 case DW_TAG_reference_type
:
2713 read_tag_reference_type (die
, cu
);
2715 case DW_TAG_string_type
:
2716 read_tag_string_type (die
, cu
);
2720 case DW_TAG_base_type
:
2721 read_base_type (die
, cu
);
2722 /* Add a typedef symbol for the type definition, if it has a
2724 new_symbol (die
, die
->type
, cu
);
2726 case DW_TAG_subrange_type
:
2727 read_subrange_type (die
, cu
);
2728 /* Add a typedef symbol for the type definition, if it has a
2730 new_symbol (die
, die
->type
, cu
);
2732 case DW_TAG_common_block
:
2733 read_common_block (die
, cu
);
2735 case DW_TAG_common_inclusion
:
2737 case DW_TAG_namespace
:
2738 processing_has_namespace_info
= 1;
2739 read_namespace (die
, cu
);
2741 case DW_TAG_imported_declaration
:
2742 case DW_TAG_imported_module
:
2743 /* FIXME: carlton/2002-10-16: Eventually, we should use the
2744 information contained in these. DW_TAG_imported_declaration
2745 dies shouldn't have children; DW_TAG_imported_module dies
2746 shouldn't in the C++ case, but conceivably could in the
2747 Fortran case, so we'll have to replace this gdb_assert if
2748 Fortran compilers start generating that info. */
2749 processing_has_namespace_info
= 1;
2750 gdb_assert (die
->child
== NULL
);
2753 new_symbol (die
, NULL
, cu
);
2759 initialize_cu_func_list (struct dwarf2_cu
*cu
)
2761 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
2765 free_cu_line_header (void *arg
)
2767 struct dwarf2_cu
*cu
= arg
;
2769 free_line_header (cu
->line_header
);
2770 cu
->line_header
= NULL
;
2774 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
2776 struct objfile
*objfile
= cu
->objfile
;
2777 struct comp_unit_head
*cu_header
= &cu
->header
;
2778 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2779 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
2780 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
2781 struct attribute
*attr
;
2783 char *comp_dir
= NULL
;
2784 struct die_info
*child_die
;
2785 bfd
*abfd
= objfile
->obfd
;
2786 struct line_header
*line_header
= 0;
2789 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2791 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
2793 /* If we didn't find a lowpc, set it to highpc to avoid complaints
2794 from finish_block. */
2795 if (lowpc
== ((CORE_ADDR
) -1))
2800 /* Find the filename. Do not use dwarf2_name here, since the filename
2801 is not a source language identifier. */
2802 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
2805 name
= DW_STRING (attr
);
2808 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
2810 comp_dir
= DW_STRING (attr
);
2811 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
2813 comp_dir
= ldirname (name
);
2814 if (comp_dir
!= NULL
)
2815 make_cleanup (xfree
, comp_dir
);
2817 if (comp_dir
!= NULL
)
2819 /* Irix 6.2 native cc prepends <machine>.: to the compilation
2820 directory, get rid of it. */
2821 char *cp
= strchr (comp_dir
, ':');
2823 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
2830 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
2833 set_cu_language (DW_UNSND (attr
), cu
);
2836 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
2838 cu
->producer
= DW_STRING (attr
);
2840 /* We assume that we're processing GCC output. */
2841 processing_gcc_compilation
= 2;
2843 start_symtab (name
, comp_dir
, lowpc
);
2844 record_debugformat ("DWARF 2");
2845 record_producer (cu
->producer
);
2847 initialize_cu_func_list (cu
);
2849 /* Decode line number information if present. We do this before
2850 processing child DIEs, so that the line header table is available
2851 for DW_AT_decl_file. */
2852 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2855 unsigned int line_offset
= DW_UNSND (attr
);
2856 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2859 cu
->line_header
= line_header
;
2860 make_cleanup (free_cu_line_header
, cu
);
2861 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
2865 /* Process all dies in compilation unit. */
2866 if (die
->child
!= NULL
)
2868 child_die
= die
->child
;
2869 while (child_die
&& child_die
->tag
)
2871 process_die (child_die
, cu
);
2872 child_die
= sibling_die (child_die
);
2876 /* Decode macro information, if present. Dwarf 2 macro information
2877 refers to information in the line number info statement program
2878 header, so we can only read it if we've read the header
2880 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
2881 if (attr
&& line_header
)
2883 unsigned int macro_offset
= DW_UNSND (attr
);
2884 dwarf_decode_macros (line_header
, macro_offset
,
2885 comp_dir
, abfd
, cu
);
2887 do_cleanups (back_to
);
2891 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
2892 struct dwarf2_cu
*cu
)
2894 struct function_range
*thisfn
;
2896 thisfn
= (struct function_range
*)
2897 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
2898 thisfn
->name
= name
;
2899 thisfn
->lowpc
= lowpc
;
2900 thisfn
->highpc
= highpc
;
2901 thisfn
->seen_line
= 0;
2902 thisfn
->next
= NULL
;
2904 if (cu
->last_fn
== NULL
)
2905 cu
->first_fn
= thisfn
;
2907 cu
->last_fn
->next
= thisfn
;
2909 cu
->last_fn
= thisfn
;
2913 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
2915 struct objfile
*objfile
= cu
->objfile
;
2916 struct context_stack
*new;
2919 struct die_info
*child_die
;
2920 struct attribute
*attr
;
2922 const char *previous_prefix
= processing_current_prefix
;
2923 struct cleanup
*back_to
= NULL
;
2925 struct block
*block
;
2927 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2929 name
= dwarf2_linkage_name (die
, cu
);
2931 /* Ignore functions with missing or empty names and functions with
2932 missing or invalid low and high pc attributes. */
2933 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
2936 if (cu
->language
== language_cplus
2937 || cu
->language
== language_java
)
2939 struct die_info
*spec_die
= die_specification (die
, cu
);
2941 /* NOTE: carlton/2004-01-23: We have to be careful in the
2942 presence of DW_AT_specification. For example, with GCC 3.4,
2947 // Definition of N::foo.
2951 then we'll have a tree of DIEs like this:
2953 1: DW_TAG_compile_unit
2954 2: DW_TAG_namespace // N
2955 3: DW_TAG_subprogram // declaration of N::foo
2956 4: DW_TAG_subprogram // definition of N::foo
2957 DW_AT_specification // refers to die #3
2959 Thus, when processing die #4, we have to pretend that we're
2960 in the context of its DW_AT_specification, namely the contex
2963 if (spec_die
!= NULL
)
2965 char *specification_prefix
= determine_prefix (spec_die
, cu
);
2966 processing_current_prefix
= specification_prefix
;
2967 back_to
= make_cleanup (xfree
, specification_prefix
);
2974 /* Record the function range for dwarf_decode_lines. */
2975 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
2977 new = push_context (0, lowpc
);
2978 new->name
= new_symbol (die
, die
->type
, cu
);
2980 /* If there is a location expression for DW_AT_frame_base, record
2982 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
2984 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
2985 expression is being recorded directly in the function's symbol
2986 and not in a separate frame-base object. I guess this hack is
2987 to avoid adding some sort of frame-base adjunct/annex to the
2988 function's symbol :-(. The problem with doing this is that it
2989 results in a function symbol with a location expression that
2990 has nothing to do with the location of the function, ouch! The
2991 relationship should be: a function's symbol has-a frame base; a
2992 frame-base has-a location expression. */
2993 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
2995 cu
->list_in_scope
= &local_symbols
;
2997 if (die
->child
!= NULL
)
2999 child_die
= die
->child
;
3000 while (child_die
&& child_die
->tag
)
3002 process_die (child_die
, cu
);
3003 child_die
= sibling_die (child_die
);
3007 new = pop_context ();
3008 /* Make a block for the local symbols within. */
3009 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3010 lowpc
, highpc
, objfile
);
3012 /* If we have address ranges, record them. */
3013 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3015 /* In C++, we can have functions nested inside functions (e.g., when
3016 a function declares a class that has methods). This means that
3017 when we finish processing a function scope, we may need to go
3018 back to building a containing block's symbol lists. */
3019 local_symbols
= new->locals
;
3020 param_symbols
= new->params
;
3022 /* If we've finished processing a top-level function, subsequent
3023 symbols go in the file symbol list. */
3024 if (outermost_context_p ())
3025 cu
->list_in_scope
= &file_symbols
;
3027 processing_current_prefix
= previous_prefix
;
3028 if (back_to
!= NULL
)
3029 do_cleanups (back_to
);
3032 /* Process all the DIES contained within a lexical block scope. Start
3033 a new scope, process the dies, and then close the scope. */
3036 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3038 struct objfile
*objfile
= cu
->objfile
;
3039 struct context_stack
*new;
3040 CORE_ADDR lowpc
, highpc
;
3041 struct die_info
*child_die
;
3044 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3046 /* Ignore blocks with missing or invalid low and high pc attributes. */
3047 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3048 as multiple lexical blocks? Handling children in a sane way would
3049 be nasty. Might be easier to properly extend generic blocks to
3051 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
3056 push_context (0, lowpc
);
3057 if (die
->child
!= NULL
)
3059 child_die
= die
->child
;
3060 while (child_die
&& child_die
->tag
)
3062 process_die (child_die
, cu
);
3063 child_die
= sibling_die (child_die
);
3066 new = pop_context ();
3068 if (local_symbols
!= NULL
)
3071 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3074 /* Note that recording ranges after traversing children, as we
3075 do here, means that recording a parent's ranges entails
3076 walking across all its children's ranges as they appear in
3077 the address map, which is quadratic behavior.
3079 It would be nicer to record the parent's ranges before
3080 traversing its children, simply overriding whatever you find
3081 there. But since we don't even decide whether to create a
3082 block until after we've traversed its children, that's hard
3084 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3086 local_symbols
= new->locals
;
3089 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3090 Return 1 if the attributes are present and valid, otherwise, return 0. */
3093 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
3094 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
)
3096 struct objfile
*objfile
= cu
->objfile
;
3097 struct comp_unit_head
*cu_header
= &cu
->header
;
3098 bfd
*obfd
= objfile
->obfd
;
3099 unsigned int addr_size
= cu_header
->addr_size
;
3100 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3101 /* Base address selection entry. */
3111 found_base
= cu_header
->base_known
;
3112 base
= cu_header
->base_address
;
3114 if (offset
>= dwarf2_per_objfile
->ranges_size
)
3116 complaint (&symfile_complaints
,
3117 _("Offset %d out of bounds for DW_AT_ranges attribute"),
3121 buffer
= dwarf2_per_objfile
->ranges_buffer
+ offset
;
3123 /* Read in the largest possible address. */
3124 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
3125 if ((marker
& mask
) == mask
)
3127 /* If we found the largest possible address, then
3128 read the base address. */
3129 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3130 buffer
+= 2 * addr_size
;
3131 offset
+= 2 * addr_size
;
3139 CORE_ADDR range_beginning
, range_end
;
3141 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
3142 buffer
+= addr_size
;
3143 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
3144 buffer
+= addr_size
;
3145 offset
+= 2 * addr_size
;
3147 /* An end of list marker is a pair of zero addresses. */
3148 if (range_beginning
== 0 && range_end
== 0)
3149 /* Found the end of list entry. */
3152 /* Each base address selection entry is a pair of 2 values.
3153 The first is the largest possible address, the second is
3154 the base address. Check for a base address here. */
3155 if ((range_beginning
& mask
) == mask
)
3157 /* If we found the largest possible address, then
3158 read the base address. */
3159 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3166 /* We have no valid base address for the ranges
3168 complaint (&symfile_complaints
,
3169 _("Invalid .debug_ranges data (no base address)"));
3173 range_beginning
+= base
;
3176 /* FIXME: This is recording everything as a low-high
3177 segment of consecutive addresses. We should have a
3178 data structure for discontiguous block ranges
3182 low
= range_beginning
;
3188 if (range_beginning
< low
)
3189 low
= range_beginning
;
3190 if (range_end
> high
)
3196 /* If the first entry is an end-of-list marker, the range
3197 describes an empty scope, i.e. no instructions. */
3203 *high_return
= high
;
3207 /* Get low and high pc attributes from a die. Return 1 if the attributes
3208 are present and valid, otherwise, return 0. Return -1 if the range is
3209 discontinuous, i.e. derived from DW_AT_ranges information. */
3211 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
3212 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
3214 struct attribute
*attr
;
3219 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
3222 high
= DW_ADDR (attr
);
3223 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3225 low
= DW_ADDR (attr
);
3227 /* Found high w/o low attribute. */
3230 /* Found consecutive range of addresses. */
3235 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
3238 /* Value of the DW_AT_ranges attribute is the offset in the
3239 .debug_ranges section. */
3240 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
))
3242 /* Found discontinuous range of addresses. */
3250 /* When using the GNU linker, .gnu.linkonce. sections are used to
3251 eliminate duplicate copies of functions and vtables and such.
3252 The linker will arbitrarily choose one and discard the others.
3253 The AT_*_pc values for such functions refer to local labels in
3254 these sections. If the section from that file was discarded, the
3255 labels are not in the output, so the relocs get a value of 0.
3256 If this is a discarded function, mark the pc bounds as invalid,
3257 so that GDB will ignore it. */
3258 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3266 /* Get the low and high pc's represented by the scope DIE, and store
3267 them in *LOWPC and *HIGHPC. If the correct values can't be
3268 determined, set *LOWPC to -1 and *HIGHPC to 0. */
3271 get_scope_pc_bounds (struct die_info
*die
,
3272 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3273 struct dwarf2_cu
*cu
)
3275 CORE_ADDR best_low
= (CORE_ADDR
) -1;
3276 CORE_ADDR best_high
= (CORE_ADDR
) 0;
3277 CORE_ADDR current_low
, current_high
;
3279 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
))
3281 best_low
= current_low
;
3282 best_high
= current_high
;
3286 struct die_info
*child
= die
->child
;
3288 while (child
&& child
->tag
)
3290 switch (child
->tag
) {
3291 case DW_TAG_subprogram
:
3292 if (dwarf2_get_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
))
3294 best_low
= min (best_low
, current_low
);
3295 best_high
= max (best_high
, current_high
);
3298 case DW_TAG_namespace
:
3299 /* FIXME: carlton/2004-01-16: Should we do this for
3300 DW_TAG_class_type/DW_TAG_structure_type, too? I think
3301 that current GCC's always emit the DIEs corresponding
3302 to definitions of methods of classes as children of a
3303 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
3304 the DIEs giving the declarations, which could be
3305 anywhere). But I don't see any reason why the
3306 standards says that they have to be there. */
3307 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
3309 if (current_low
!= ((CORE_ADDR
) -1))
3311 best_low
= min (best_low
, current_low
);
3312 best_high
= max (best_high
, current_high
);
3320 child
= sibling_die (child
);
3325 *highpc
= best_high
;
3328 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
3331 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
3332 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
3334 struct attribute
*attr
;
3336 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
3339 CORE_ADDR high
= DW_ADDR (attr
);
3340 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3343 CORE_ADDR low
= DW_ADDR (attr
);
3344 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
3348 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
3351 bfd
*obfd
= cu
->objfile
->obfd
;
3353 /* The value of the DW_AT_ranges attribute is the offset of the
3354 address range list in the .debug_ranges section. */
3355 unsigned long offset
= DW_UNSND (attr
);
3356 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges_buffer
+ offset
;
3358 /* For some target architectures, but not others, the
3359 read_address function sign-extends the addresses it returns.
3360 To recognize base address selection entries, we need a
3362 unsigned int addr_size
= cu
->header
.addr_size
;
3363 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3365 /* The base address, to which the next pair is relative. Note
3366 that this 'base' is a DWARF concept: most entries in a range
3367 list are relative, to reduce the number of relocs against the
3368 debugging information. This is separate from this function's
3369 'baseaddr' argument, which GDB uses to relocate debugging
3370 information from a shared library based on the address at
3371 which the library was loaded. */
3372 CORE_ADDR base
= cu
->header
.base_address
;
3373 int base_known
= cu
->header
.base_known
;
3375 if (offset
>= dwarf2_per_objfile
->ranges_size
)
3377 complaint (&symfile_complaints
,
3378 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
3385 unsigned int bytes_read
;
3386 CORE_ADDR start
, end
;
3388 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
3389 buffer
+= bytes_read
;
3390 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
3391 buffer
+= bytes_read
;
3393 /* Did we find the end of the range list? */
3394 if (start
== 0 && end
== 0)
3397 /* Did we find a base address selection entry? */
3398 else if ((start
& base_select_mask
) == base_select_mask
)
3404 /* We found an ordinary address range. */
3409 complaint (&symfile_complaints
,
3410 _("Invalid .debug_ranges data (no base address)"));
3414 record_block_range (block
,
3415 baseaddr
+ base
+ start
,
3416 baseaddr
+ base
+ end
- 1);
3422 /* Add an aggregate field to the field list. */
3425 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
3426 struct dwarf2_cu
*cu
)
3428 struct objfile
*objfile
= cu
->objfile
;
3429 struct nextfield
*new_field
;
3430 struct attribute
*attr
;
3432 char *fieldname
= "";
3434 /* Allocate a new field list entry and link it in. */
3435 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
3436 make_cleanup (xfree
, new_field
);
3437 memset (new_field
, 0, sizeof (struct nextfield
));
3438 new_field
->next
= fip
->fields
;
3439 fip
->fields
= new_field
;
3442 /* Handle accessibility and virtuality of field.
3443 The default accessibility for members is public, the default
3444 accessibility for inheritance is private. */
3445 if (die
->tag
!= DW_TAG_inheritance
)
3446 new_field
->accessibility
= DW_ACCESS_public
;
3448 new_field
->accessibility
= DW_ACCESS_private
;
3449 new_field
->virtuality
= DW_VIRTUALITY_none
;
3451 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3453 new_field
->accessibility
= DW_UNSND (attr
);
3454 if (new_field
->accessibility
!= DW_ACCESS_public
)
3455 fip
->non_public_fields
= 1;
3456 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
3458 new_field
->virtuality
= DW_UNSND (attr
);
3460 fp
= &new_field
->field
;
3462 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
3464 /* Data member other than a C++ static data member. */
3466 /* Get type of field. */
3467 fp
->type
= die_type (die
, cu
);
3469 FIELD_STATIC_KIND (*fp
) = 0;
3471 /* Get bit size of field (zero if none). */
3472 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
3475 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
3479 FIELD_BITSIZE (*fp
) = 0;
3482 /* Get bit offset of field. */
3483 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3488 if (attr_form_is_section_offset (attr
))
3490 dwarf2_complex_location_expr_complaint ();
3493 else if (attr_form_is_constant (attr
))
3494 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
3496 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
3498 FIELD_BITPOS (*fp
) = byte_offset
* bits_per_byte
;
3501 FIELD_BITPOS (*fp
) = 0;
3502 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
3505 if (BITS_BIG_ENDIAN
)
3507 /* For big endian bits, the DW_AT_bit_offset gives the
3508 additional bit offset from the MSB of the containing
3509 anonymous object to the MSB of the field. We don't
3510 have to do anything special since we don't need to
3511 know the size of the anonymous object. */
3512 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
3516 /* For little endian bits, compute the bit offset to the
3517 MSB of the anonymous object, subtract off the number of
3518 bits from the MSB of the field to the MSB of the
3519 object, and then subtract off the number of bits of
3520 the field itself. The result is the bit offset of
3521 the LSB of the field. */
3523 int bit_offset
= DW_UNSND (attr
);
3525 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
3528 /* The size of the anonymous object containing
3529 the bit field is explicit, so use the
3530 indicated size (in bytes). */
3531 anonymous_size
= DW_UNSND (attr
);
3535 /* The size of the anonymous object containing
3536 the bit field must be inferred from the type
3537 attribute of the data member containing the
3539 anonymous_size
= TYPE_LENGTH (fp
->type
);
3541 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
3542 - bit_offset
- FIELD_BITSIZE (*fp
);
3546 /* Get name of field. */
3547 fieldname
= dwarf2_name (die
, cu
);
3548 if (fieldname
== NULL
)
3551 /* The name is already allocated along with this objfile, so we don't
3552 need to duplicate it for the type. */
3553 fp
->name
= fieldname
;
3555 /* Change accessibility for artificial fields (e.g. virtual table
3556 pointer or virtual base class pointer) to private. */
3557 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
3559 new_field
->accessibility
= DW_ACCESS_private
;
3560 fip
->non_public_fields
= 1;
3563 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
3565 /* C++ static member. */
3567 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
3568 is a declaration, but all versions of G++ as of this writing
3569 (so through at least 3.2.1) incorrectly generate
3570 DW_TAG_variable tags. */
3574 /* Get name of field. */
3575 fieldname
= dwarf2_name (die
, cu
);
3576 if (fieldname
== NULL
)
3579 /* Get physical name. */
3580 physname
= dwarf2_linkage_name (die
, cu
);
3582 /* The name is already allocated along with this objfile, so we don't
3583 need to duplicate it for the type. */
3584 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
3585 FIELD_TYPE (*fp
) = die_type (die
, cu
);
3586 FIELD_NAME (*fp
) = fieldname
;
3588 else if (die
->tag
== DW_TAG_inheritance
)
3590 /* C++ base class field. */
3591 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3593 FIELD_BITPOS (*fp
) = (decode_locdesc (DW_BLOCK (attr
), cu
)
3595 FIELD_BITSIZE (*fp
) = 0;
3596 FIELD_STATIC_KIND (*fp
) = 0;
3597 FIELD_TYPE (*fp
) = die_type (die
, cu
);
3598 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
3599 fip
->nbaseclasses
++;
3603 /* Create the vector of fields, and attach it to the type. */
3606 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3607 struct dwarf2_cu
*cu
)
3609 int nfields
= fip
->nfields
;
3611 /* Record the field count, allocate space for the array of fields,
3612 and create blank accessibility bitfields if necessary. */
3613 TYPE_NFIELDS (type
) = nfields
;
3614 TYPE_FIELDS (type
) = (struct field
*)
3615 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3616 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3618 if (fip
->non_public_fields
)
3620 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3622 TYPE_FIELD_PRIVATE_BITS (type
) =
3623 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3624 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3626 TYPE_FIELD_PROTECTED_BITS (type
) =
3627 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3628 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3630 TYPE_FIELD_IGNORE_BITS (type
) =
3631 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3632 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3635 /* If the type has baseclasses, allocate and clear a bit vector for
3636 TYPE_FIELD_VIRTUAL_BITS. */
3637 if (fip
->nbaseclasses
)
3639 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
3640 unsigned char *pointer
;
3642 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3643 pointer
= TYPE_ALLOC (type
, num_bytes
);
3644 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
3645 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
3646 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
3649 /* Copy the saved-up fields into the field vector. Start from the head
3650 of the list, adding to the tail of the field array, so that they end
3651 up in the same order in the array in which they were added to the list. */
3652 while (nfields
-- > 0)
3654 TYPE_FIELD (type
, nfields
) = fip
->fields
->field
;
3655 switch (fip
->fields
->accessibility
)
3657 case DW_ACCESS_private
:
3658 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3661 case DW_ACCESS_protected
:
3662 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3665 case DW_ACCESS_public
:
3669 /* Unknown accessibility. Complain and treat it as public. */
3671 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
3672 fip
->fields
->accessibility
);
3676 if (nfields
< fip
->nbaseclasses
)
3678 switch (fip
->fields
->virtuality
)
3680 case DW_VIRTUALITY_virtual
:
3681 case DW_VIRTUALITY_pure_virtual
:
3682 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
3686 fip
->fields
= fip
->fields
->next
;
3690 /* Add a member function to the proper fieldlist. */
3693 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
3694 struct type
*type
, struct dwarf2_cu
*cu
)
3696 struct objfile
*objfile
= cu
->objfile
;
3697 struct attribute
*attr
;
3698 struct fnfieldlist
*flp
;
3700 struct fn_field
*fnp
;
3703 struct nextfnfield
*new_fnfield
;
3705 /* Get name of member function. */
3706 fieldname
= dwarf2_name (die
, cu
);
3707 if (fieldname
== NULL
)
3710 /* Get the mangled name. */
3711 physname
= dwarf2_linkage_name (die
, cu
);
3713 /* Look up member function name in fieldlist. */
3714 for (i
= 0; i
< fip
->nfnfields
; i
++)
3716 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
3720 /* Create new list element if necessary. */
3721 if (i
< fip
->nfnfields
)
3722 flp
= &fip
->fnfieldlists
[i
];
3725 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
3727 fip
->fnfieldlists
= (struct fnfieldlist
*)
3728 xrealloc (fip
->fnfieldlists
,
3729 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
3730 * sizeof (struct fnfieldlist
));
3731 if (fip
->nfnfields
== 0)
3732 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
3734 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
3735 flp
->name
= fieldname
;
3741 /* Create a new member function field and chain it to the field list
3743 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
3744 make_cleanup (xfree
, new_fnfield
);
3745 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
3746 new_fnfield
->next
= flp
->head
;
3747 flp
->head
= new_fnfield
;
3750 /* Fill in the member function field info. */
3751 fnp
= &new_fnfield
->fnfield
;
3752 /* The name is already allocated along with this objfile, so we don't
3753 need to duplicate it for the type. */
3754 fnp
->physname
= physname
? physname
: "";
3755 fnp
->type
= alloc_type (objfile
);
3756 if (die
->type
&& TYPE_CODE (die
->type
) == TYPE_CODE_FUNC
)
3758 int nparams
= TYPE_NFIELDS (die
->type
);
3760 /* TYPE is the domain of this method, and DIE->TYPE is the type
3761 of the method itself (TYPE_CODE_METHOD). */
3762 smash_to_method_type (fnp
->type
, type
,
3763 TYPE_TARGET_TYPE (die
->type
),
3764 TYPE_FIELDS (die
->type
),
3765 TYPE_NFIELDS (die
->type
),
3766 TYPE_VARARGS (die
->type
));
3768 /* Handle static member functions.
3769 Dwarf2 has no clean way to discern C++ static and non-static
3770 member functions. G++ helps GDB by marking the first
3771 parameter for non-static member functions (which is the
3772 this pointer) as artificial. We obtain this information
3773 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
3774 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (die
->type
, 0) == 0)
3775 fnp
->voffset
= VOFFSET_STATIC
;
3778 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
3781 /* Get fcontext from DW_AT_containing_type if present. */
3782 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
3783 fnp
->fcontext
= die_containing_type (die
, cu
);
3785 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
3786 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
3788 /* Get accessibility. */
3789 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3792 switch (DW_UNSND (attr
))
3794 case DW_ACCESS_private
:
3795 fnp
->is_private
= 1;
3797 case DW_ACCESS_protected
:
3798 fnp
->is_protected
= 1;
3803 /* Check for artificial methods. */
3804 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
3805 if (attr
&& DW_UNSND (attr
) != 0)
3806 fnp
->is_artificial
= 1;
3808 /* Get index in virtual function table if it is a virtual member function. */
3809 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
3812 /* Support the .debug_loc offsets */
3813 if (attr_form_is_block (attr
))
3815 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
3817 else if (attr_form_is_section_offset (attr
))
3819 dwarf2_complex_location_expr_complaint ();
3823 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
3829 /* Create the vector of member function fields, and attach it to the type. */
3832 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
3833 struct dwarf2_cu
*cu
)
3835 struct fnfieldlist
*flp
;
3836 int total_length
= 0;
3839 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3840 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
3841 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
3843 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
3845 struct nextfnfield
*nfp
= flp
->head
;
3846 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
3849 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
3850 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
3851 fn_flp
->fn_fields
= (struct fn_field
*)
3852 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
3853 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
3854 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
3856 total_length
+= flp
->length
;
3859 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
3860 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
3863 /* Returns non-zero if NAME is the name of a vtable member in CU's
3864 language, zero otherwise. */
3866 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
3868 static const char vptr
[] = "_vptr";
3869 static const char vtable
[] = "vtable";
3871 /* Look for the C++ and Java forms of the vtable. */
3872 if ((cu
->language
== language_java
3873 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
3874 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
3875 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
3881 /* GCC outputs unnamed structures that are really pointers to member
3882 functions, with the ABI-specified layout. If DIE (from CU) describes
3883 such a structure, set its type, and return nonzero. Otherwise return
3886 GCC shouldn't do this; it should just output pointer to member DIEs.
3887 This is GCC PR debug/28767. */
3890 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
3892 struct objfile
*objfile
= cu
->objfile
;
3894 struct die_info
*pfn_die
, *delta_die
;
3895 struct attribute
*pfn_name
, *delta_name
;
3896 struct type
*pfn_type
, *domain_type
;
3898 /* Check for a structure with no name and two children. */
3899 if (die
->tag
!= DW_TAG_structure_type
3900 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
3901 || die
->child
== NULL
3902 || die
->child
->sibling
== NULL
3903 || (die
->child
->sibling
->sibling
!= NULL
3904 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
3907 /* Check for __pfn and __delta members. */
3908 pfn_die
= die
->child
;
3909 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
3910 if (pfn_die
->tag
!= DW_TAG_member
3912 || DW_STRING (pfn_name
) == NULL
3913 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
3916 delta_die
= pfn_die
->sibling
;
3917 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
3918 if (delta_die
->tag
!= DW_TAG_member
3919 || delta_name
== NULL
3920 || DW_STRING (delta_name
) == NULL
3921 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
3924 /* Find the type of the method. */
3925 pfn_type
= die_type (pfn_die
, cu
);
3926 if (pfn_type
== NULL
3927 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
3928 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
3931 /* Look for the "this" argument. */
3932 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
3933 if (TYPE_NFIELDS (pfn_type
) == 0
3934 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
3937 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
3938 type
= alloc_type (objfile
);
3939 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
3940 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
3941 TYPE_VARARGS (pfn_type
));
3942 type
= lookup_methodptr_type (type
);
3943 set_die_type (die
, type
, cu
);
3948 /* Called when we find the DIE that starts a structure or union scope
3949 (definition) to process all dies that define the members of the
3952 NOTE: we need to call struct_type regardless of whether or not the
3953 DIE has an at_name attribute, since it might be an anonymous
3954 structure or union. This gets the type entered into our set of
3957 However, if the structure is incomplete (an opaque struct/union)
3958 then suppress creating a symbol table entry for it since gdb only
3959 wants to find the one with the complete definition. Note that if
3960 it is complete, we just call new_symbol, which does it's own
3961 checking about whether the struct/union is anonymous or not (and
3962 suppresses creating a symbol table entry itself). */
3965 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
3967 struct objfile
*objfile
= cu
->objfile
;
3969 struct attribute
*attr
;
3970 const char *previous_prefix
= processing_current_prefix
;
3971 struct cleanup
*back_to
= NULL
;
3977 if (quirk_gcc_member_function_pointer (die
, cu
))
3980 type
= alloc_type (objfile
);
3981 INIT_CPLUS_SPECIFIC (type
);
3982 name
= dwarf2_name (die
, cu
);
3985 if (cu
->language
== language_cplus
3986 || cu
->language
== language_java
)
3988 char *new_prefix
= determine_class_name (die
, cu
);
3989 TYPE_TAG_NAME (type
) = obsavestring (new_prefix
,
3990 strlen (new_prefix
),
3991 &objfile
->objfile_obstack
);
3992 back_to
= make_cleanup (xfree
, new_prefix
);
3993 processing_current_prefix
= new_prefix
;
3997 /* The name is already allocated along with this objfile, so
3998 we don't need to duplicate it for the type. */
3999 TYPE_TAG_NAME (type
) = name
;
4003 if (die
->tag
== DW_TAG_structure_type
)
4005 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
4007 else if (die
->tag
== DW_TAG_union_type
)
4009 TYPE_CODE (type
) = TYPE_CODE_UNION
;
4013 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
4015 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
4018 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4021 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4025 TYPE_LENGTH (type
) = 0;
4028 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB_SUPPORTED
;
4029 if (die_is_declaration (die
, cu
))
4030 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
4032 /* We need to add the type field to the die immediately so we don't
4033 infinitely recurse when dealing with pointers to the structure
4034 type within the structure itself. */
4035 set_die_type (die
, type
, cu
);
4037 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
4039 struct field_info fi
;
4040 struct die_info
*child_die
;
4041 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
4043 memset (&fi
, 0, sizeof (struct field_info
));
4045 child_die
= die
->child
;
4047 while (child_die
&& child_die
->tag
)
4049 if (child_die
->tag
== DW_TAG_member
4050 || child_die
->tag
== DW_TAG_variable
)
4052 /* NOTE: carlton/2002-11-05: A C++ static data member
4053 should be a DW_TAG_member that is a declaration, but
4054 all versions of G++ as of this writing (so through at
4055 least 3.2.1) incorrectly generate DW_TAG_variable
4056 tags for them instead. */
4057 dwarf2_add_field (&fi
, child_die
, cu
);
4059 else if (child_die
->tag
== DW_TAG_subprogram
)
4061 /* C++ member function. */
4062 read_type_die (child_die
, cu
);
4063 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
4065 else if (child_die
->tag
== DW_TAG_inheritance
)
4067 /* C++ base class field. */
4068 dwarf2_add_field (&fi
, child_die
, cu
);
4070 child_die
= sibling_die (child_die
);
4073 /* Attach fields and member functions to the type. */
4075 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
4078 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
4080 /* Get the type which refers to the base class (possibly this
4081 class itself) which contains the vtable pointer for the current
4082 class from the DW_AT_containing_type attribute. */
4084 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4086 struct type
*t
= die_containing_type (die
, cu
);
4088 TYPE_VPTR_BASETYPE (type
) = t
;
4093 /* Our own class provides vtbl ptr. */
4094 for (i
= TYPE_NFIELDS (t
) - 1;
4095 i
>= TYPE_N_BASECLASSES (t
);
4098 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
4100 if (is_vtable_name (fieldname
, cu
))
4102 TYPE_VPTR_FIELDNO (type
) = i
;
4107 /* Complain if virtual function table field not found. */
4108 if (i
< TYPE_N_BASECLASSES (t
))
4109 complaint (&symfile_complaints
,
4110 _("virtual function table pointer not found when defining class '%s'"),
4111 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
4116 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
4119 else if (cu
->producer
4120 && strncmp (cu
->producer
,
4121 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
4123 /* The IBM XLC compiler does not provide direct indication
4124 of the containing type, but the vtable pointer is
4125 always named __vfp. */
4129 for (i
= TYPE_NFIELDS (type
) - 1;
4130 i
>= TYPE_N_BASECLASSES (type
);
4133 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
4135 TYPE_VPTR_FIELDNO (type
) = i
;
4136 TYPE_VPTR_BASETYPE (type
) = type
;
4143 do_cleanups (back_to
);
4146 processing_current_prefix
= previous_prefix
;
4147 if (back_to
!= NULL
)
4148 do_cleanups (back_to
);
4152 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4154 struct objfile
*objfile
= cu
->objfile
;
4155 const char *previous_prefix
= processing_current_prefix
;
4156 struct die_info
*child_die
= die
->child
;
4158 if (TYPE_TAG_NAME (die
->type
) != NULL
)
4159 processing_current_prefix
= TYPE_TAG_NAME (die
->type
);
4161 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
4162 snapshots) has been known to create a die giving a declaration
4163 for a class that has, as a child, a die giving a definition for a
4164 nested class. So we have to process our children even if the
4165 current die is a declaration. Normally, of course, a declaration
4166 won't have any children at all. */
4168 while (child_die
!= NULL
&& child_die
->tag
)
4170 if (child_die
->tag
== DW_TAG_member
4171 || child_die
->tag
== DW_TAG_variable
4172 || child_die
->tag
== DW_TAG_inheritance
)
4177 process_die (child_die
, cu
);
4179 child_die
= sibling_die (child_die
);
4182 /* Do not consider external references. According to the DWARF standard,
4183 these DIEs are identified by the fact that they have no byte_size
4184 attribute, and a declaration attribute. */
4185 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
4186 || !die_is_declaration (die
, cu
))
4187 new_symbol (die
, die
->type
, cu
);
4189 processing_current_prefix
= previous_prefix
;
4192 /* Given a DW_AT_enumeration_type die, set its type. We do not
4193 complete the type's fields yet, or create any symbols. */
4196 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4198 struct objfile
*objfile
= cu
->objfile
;
4200 struct attribute
*attr
;
4206 type
= alloc_type (objfile
);
4208 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
4209 name
= dwarf2_name (die
, cu
);
4212 if (processing_has_namespace_info
)
4214 TYPE_TAG_NAME (type
) = typename_concat (&objfile
->objfile_obstack
,
4215 processing_current_prefix
,
4220 /* The name is already allocated along with this objfile, so
4221 we don't need to duplicate it for the type. */
4222 TYPE_TAG_NAME (type
) = name
;
4226 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4229 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4233 TYPE_LENGTH (type
) = 0;
4236 if (die_is_declaration (die
, cu
))
4237 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
4239 set_die_type (die
, type
, cu
);
4242 /* Determine the name of the type represented by DIE, which should be
4243 a named C++ or Java compound type. Return the name in question; the caller
4244 is responsible for xfree()'ing it. */
4247 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
4249 struct cleanup
*back_to
= NULL
;
4250 struct die_info
*spec_die
= die_specification (die
, cu
);
4251 char *new_prefix
= NULL
;
4253 /* If this is the definition of a class that is declared by another
4254 die, then processing_current_prefix may not be accurate; see
4255 read_func_scope for a similar example. */
4256 if (spec_die
!= NULL
)
4258 char *specification_prefix
= determine_prefix (spec_die
, cu
);
4259 processing_current_prefix
= specification_prefix
;
4260 back_to
= make_cleanup (xfree
, specification_prefix
);
4263 /* If we don't have namespace debug info, guess the name by trying
4264 to demangle the names of members, just like we did in
4265 guess_structure_name. */
4266 if (!processing_has_namespace_info
)
4268 struct die_info
*child
;
4270 for (child
= die
->child
;
4271 child
!= NULL
&& child
->tag
!= 0;
4272 child
= sibling_die (child
))
4274 if (child
->tag
== DW_TAG_subprogram
)
4277 = language_class_name_from_physname (cu
->language_defn
,
4281 if (new_prefix
!= NULL
)
4287 if (new_prefix
== NULL
)
4289 const char *name
= dwarf2_name (die
, cu
);
4290 new_prefix
= typename_concat (NULL
, processing_current_prefix
,
4291 name
? name
: "<<anonymous>>",
4295 if (back_to
!= NULL
)
4296 do_cleanups (back_to
);
4301 /* Given a pointer to a die which begins an enumeration, process all
4302 the dies that define the members of the enumeration, and create the
4303 symbol for the enumeration type.
4305 NOTE: We reverse the order of the element list. */
4308 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4310 struct objfile
*objfile
= cu
->objfile
;
4311 struct die_info
*child_die
;
4312 struct field
*fields
;
4315 int unsigned_enum
= 1;
4320 if (die
->child
!= NULL
)
4322 child_die
= die
->child
;
4323 while (child_die
&& child_die
->tag
)
4325 if (child_die
->tag
!= DW_TAG_enumerator
)
4327 process_die (child_die
, cu
);
4331 name
= dwarf2_name (child_die
, cu
);
4334 sym
= new_symbol (child_die
, die
->type
, cu
);
4335 if (SYMBOL_VALUE (sym
) < 0)
4338 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4340 fields
= (struct field
*)
4342 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
4343 * sizeof (struct field
));
4346 FIELD_NAME (fields
[num_fields
]) = DEPRECATED_SYMBOL_NAME (sym
);
4347 FIELD_TYPE (fields
[num_fields
]) = NULL
;
4348 FIELD_BITPOS (fields
[num_fields
]) = SYMBOL_VALUE (sym
);
4349 FIELD_BITSIZE (fields
[num_fields
]) = 0;
4350 FIELD_STATIC_KIND (fields
[num_fields
]) = 0;
4356 child_die
= sibling_die (child_die
);
4361 TYPE_NFIELDS (die
->type
) = num_fields
;
4362 TYPE_FIELDS (die
->type
) = (struct field
*)
4363 TYPE_ALLOC (die
->type
, sizeof (struct field
) * num_fields
);
4364 memcpy (TYPE_FIELDS (die
->type
), fields
,
4365 sizeof (struct field
) * num_fields
);
4369 TYPE_FLAGS (die
->type
) |= TYPE_FLAG_UNSIGNED
;
4372 new_symbol (die
, die
->type
, cu
);
4375 /* Extract all information from a DW_TAG_array_type DIE and put it in
4376 the DIE's type field. For now, this only handles one dimensional
4380 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4382 struct objfile
*objfile
= cu
->objfile
;
4383 struct die_info
*child_die
;
4384 struct type
*type
= NULL
;
4385 struct type
*element_type
, *range_type
, *index_type
;
4386 struct type
**range_types
= NULL
;
4387 struct attribute
*attr
;
4389 struct cleanup
*back_to
;
4392 /* Return if we've already decoded this type. */
4398 element_type
= die_type (die
, cu
);
4400 /* Irix 6.2 native cc creates array types without children for
4401 arrays with unspecified length. */
4402 if (die
->child
== NULL
)
4404 index_type
= builtin_type_int32
;
4405 range_type
= create_range_type (NULL
, index_type
, 0, -1);
4406 set_die_type (die
, create_array_type (NULL
, element_type
, range_type
),
4411 back_to
= make_cleanup (null_cleanup
, NULL
);
4412 child_die
= die
->child
;
4413 while (child_die
&& child_die
->tag
)
4415 if (child_die
->tag
== DW_TAG_subrange_type
)
4417 read_subrange_type (child_die
, cu
);
4419 if (child_die
->type
!= NULL
)
4421 /* The range type was succesfully read. Save it for
4422 the array type creation. */
4423 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
4425 range_types
= (struct type
**)
4426 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
4427 * sizeof (struct type
*));
4429 make_cleanup (free_current_contents
, &range_types
);
4431 range_types
[ndim
++] = child_die
->type
;
4434 child_die
= sibling_die (child_die
);
4437 /* Dwarf2 dimensions are output from left to right, create the
4438 necessary array types in backwards order. */
4440 type
= element_type
;
4442 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
4446 type
= create_array_type (NULL
, type
, range_types
[i
++]);
4451 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
4454 /* Understand Dwarf2 support for vector types (like they occur on
4455 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
4456 array type. This is not part of the Dwarf2/3 standard yet, but a
4457 custom vendor extension. The main difference between a regular
4458 array and the vector variant is that vectors are passed by value
4460 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
4462 make_vector_type (type
);
4464 name
= dwarf2_name (die
, cu
);
4466 TYPE_NAME (type
) = name
;
4468 do_cleanups (back_to
);
4470 /* Install the type in the die. */
4471 set_die_type (die
, type
, cu
);
4474 static enum dwarf_array_dim_ordering
4475 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
4477 struct attribute
*attr
;
4479 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
4481 if (attr
) return DW_SND (attr
);
4484 GNU F77 is a special case, as at 08/2004 array type info is the
4485 opposite order to the dwarf2 specification, but data is still
4486 laid out as per normal fortran.
4488 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
4492 if (cu
->language
== language_fortran
&&
4493 cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
4495 return DW_ORD_row_major
;
4498 switch (cu
->language_defn
->la_array_ordering
)
4500 case array_column_major
:
4501 return DW_ORD_col_major
;
4502 case array_row_major
:
4504 return DW_ORD_row_major
;
4508 /* Extract all information from a DW_TAG_set_type DIE and put it in
4509 the DIE's type field. */
4512 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4514 if (die
->type
== NULL
)
4515 die
->type
= create_set_type ((struct type
*) NULL
, die_type (die
, cu
));
4518 /* First cut: install each common block member as a global variable. */
4521 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
4523 struct die_info
*child_die
;
4524 struct attribute
*attr
;
4526 CORE_ADDR base
= (CORE_ADDR
) 0;
4528 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
4531 /* Support the .debug_loc offsets */
4532 if (attr_form_is_block (attr
))
4534 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
4536 else if (attr_form_is_section_offset (attr
))
4538 dwarf2_complex_location_expr_complaint ();
4542 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
4543 "common block member");
4546 if (die
->child
!= NULL
)
4548 child_die
= die
->child
;
4549 while (child_die
&& child_die
->tag
)
4551 sym
= new_symbol (child_die
, NULL
, cu
);
4552 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
4555 SYMBOL_VALUE_ADDRESS (sym
) =
4556 base
+ decode_locdesc (DW_BLOCK (attr
), cu
);
4557 add_symbol_to_list (sym
, &global_symbols
);
4559 child_die
= sibling_die (child_die
);
4564 /* Read a C++ namespace. */
4567 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4569 struct objfile
*objfile
= cu
->objfile
;
4570 const char *previous_prefix
= processing_current_prefix
;
4573 struct die_info
*current_die
;
4574 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4576 name
= namespace_name (die
, &is_anonymous
, cu
);
4578 /* Now build the name of the current namespace. */
4580 if (previous_prefix
[0] == '\0')
4582 processing_current_prefix
= name
;
4586 char *temp_name
= typename_concat (NULL
, previous_prefix
, name
, cu
);
4587 make_cleanup (xfree
, temp_name
);
4588 processing_current_prefix
= temp_name
;
4591 /* Add a symbol associated to this if we haven't seen the namespace
4592 before. Also, add a using directive if it's an anonymous
4595 if (dwarf2_extension (die
, cu
) == NULL
)
4599 /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
4600 this cast will hopefully become unnecessary. */
4601 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0,
4602 (char *) processing_current_prefix
,
4604 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
4606 new_symbol (die
, type
, cu
);
4607 set_die_type (die
, type
, cu
);
4610 cp_add_using_directive (processing_current_prefix
,
4611 strlen (previous_prefix
),
4612 strlen (processing_current_prefix
));
4615 if (die
->child
!= NULL
)
4617 struct die_info
*child_die
= die
->child
;
4619 while (child_die
&& child_die
->tag
)
4621 process_die (child_die
, cu
);
4622 child_die
= sibling_die (child_die
);
4626 processing_current_prefix
= previous_prefix
;
4627 do_cleanups (back_to
);
4630 /* Return the name of the namespace represented by DIE. Set
4631 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
4635 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
4637 struct die_info
*current_die
;
4638 const char *name
= NULL
;
4640 /* Loop through the extensions until we find a name. */
4642 for (current_die
= die
;
4643 current_die
!= NULL
;
4644 current_die
= dwarf2_extension (die
, cu
))
4646 name
= dwarf2_name (current_die
, cu
);
4651 /* Is it an anonymous namespace? */
4653 *is_anonymous
= (name
== NULL
);
4655 name
= "(anonymous namespace)";
4660 /* Extract all information from a DW_TAG_pointer_type DIE and add to
4661 the user defined type vector. */
4664 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4666 struct comp_unit_head
*cu_header
= &cu
->header
;
4668 struct attribute
*attr_byte_size
;
4669 struct attribute
*attr_address_class
;
4670 int byte_size
, addr_class
;
4677 type
= lookup_pointer_type (die_type (die
, cu
));
4679 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4681 byte_size
= DW_UNSND (attr_byte_size
);
4683 byte_size
= cu_header
->addr_size
;
4685 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
4686 if (attr_address_class
)
4687 addr_class
= DW_UNSND (attr_address_class
);
4689 addr_class
= DW_ADDR_none
;
4691 /* If the pointer size or address class is different than the
4692 default, create a type variant marked as such and set the
4693 length accordingly. */
4694 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
4696 if (gdbarch_address_class_type_flags_p (current_gdbarch
))
4700 type_flags
= gdbarch_address_class_type_flags
4701 (current_gdbarch
, byte_size
, addr_class
);
4702 gdb_assert ((type_flags
& ~TYPE_FLAG_ADDRESS_CLASS_ALL
) == 0);
4703 type
= make_type_with_address_space (type
, type_flags
);
4705 else if (TYPE_LENGTH (type
) != byte_size
)
4707 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
4710 /* Should we also complain about unhandled address classes? */
4714 TYPE_LENGTH (type
) = byte_size
;
4715 set_die_type (die
, type
, cu
);
4718 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
4719 the user defined type vector. */
4722 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4724 struct objfile
*objfile
= cu
->objfile
;
4726 struct type
*to_type
;
4727 struct type
*domain
;
4734 to_type
= die_type (die
, cu
);
4735 domain
= die_containing_type (die
, cu
);
4737 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
4738 type
= lookup_methodptr_type (to_type
);
4740 type
= lookup_memberptr_type (to_type
, domain
);
4742 set_die_type (die
, type
, cu
);
4745 /* Extract all information from a DW_TAG_reference_type DIE and add to
4746 the user defined type vector. */
4749 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4751 struct comp_unit_head
*cu_header
= &cu
->header
;
4753 struct attribute
*attr
;
4760 type
= lookup_reference_type (die_type (die
, cu
));
4761 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4764 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4768 TYPE_LENGTH (type
) = cu_header
->addr_size
;
4770 set_die_type (die
, type
, cu
);
4774 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4776 struct type
*base_type
;
4783 base_type
= die_type (die
, cu
);
4784 set_die_type (die
, make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0),
4789 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4791 struct type
*base_type
;
4798 base_type
= die_type (die
, cu
);
4799 set_die_type (die
, make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0),
4803 /* Extract all information from a DW_TAG_string_type DIE and add to
4804 the user defined type vector. It isn't really a user defined type,
4805 but it behaves like one, with other DIE's using an AT_user_def_type
4806 attribute to reference it. */
4809 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4811 struct objfile
*objfile
= cu
->objfile
;
4812 struct type
*type
, *range_type
, *index_type
, *char_type
;
4813 struct attribute
*attr
;
4814 unsigned int length
;
4821 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
4824 length
= DW_UNSND (attr
);
4828 /* check for the DW_AT_byte_size attribute */
4829 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4832 length
= DW_UNSND (attr
);
4840 index_type
= builtin_type_int32
;
4841 range_type
= create_range_type (NULL
, index_type
, 1, length
);
4842 type
= create_string_type (NULL
, range_type
);
4844 set_die_type (die
, type
, cu
);
4847 /* Handle DIES due to C code like:
4851 int (*funcp)(int a, long l);
4855 ('funcp' generates a DW_TAG_subroutine_type DIE)
4859 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4861 struct type
*type
; /* Type that this function returns */
4862 struct type
*ftype
; /* Function that returns above type */
4863 struct attribute
*attr
;
4865 /* Decode the type that this subroutine returns */
4870 type
= die_type (die
, cu
);
4871 ftype
= make_function_type (type
, (struct type
**) 0);
4873 /* All functions in C++, Pascal and Java have prototypes. */
4874 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
4875 if ((attr
&& (DW_UNSND (attr
) != 0))
4876 || cu
->language
== language_cplus
4877 || cu
->language
== language_java
4878 || cu
->language
== language_pascal
)
4879 TYPE_FLAGS (ftype
) |= TYPE_FLAG_PROTOTYPED
;
4881 if (die
->child
!= NULL
)
4883 struct die_info
*child_die
;
4887 /* Count the number of parameters.
4888 FIXME: GDB currently ignores vararg functions, but knows about
4889 vararg member functions. */
4890 child_die
= die
->child
;
4891 while (child_die
&& child_die
->tag
)
4893 if (child_die
->tag
== DW_TAG_formal_parameter
)
4895 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
4896 TYPE_FLAGS (ftype
) |= TYPE_FLAG_VARARGS
;
4897 child_die
= sibling_die (child_die
);
4900 /* Allocate storage for parameters and fill them in. */
4901 TYPE_NFIELDS (ftype
) = nparams
;
4902 TYPE_FIELDS (ftype
) = (struct field
*)
4903 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
4905 child_die
= die
->child
;
4906 while (child_die
&& child_die
->tag
)
4908 if (child_die
->tag
== DW_TAG_formal_parameter
)
4910 /* Dwarf2 has no clean way to discern C++ static and non-static
4911 member functions. G++ helps GDB by marking the first
4912 parameter for non-static member functions (which is the
4913 this pointer) as artificial. We pass this information
4914 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
4915 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
4917 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
4919 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
4920 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
4923 child_die
= sibling_die (child_die
);
4927 set_die_type (die
, ftype
, cu
);
4931 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
4933 struct objfile
*objfile
= cu
->objfile
;
4934 struct attribute
*attr
;
4939 name
= dwarf2_name (die
, cu
);
4940 set_die_type (die
, init_type (TYPE_CODE_TYPEDEF
, 0,
4941 TYPE_FLAG_TARGET_STUB
, name
, objfile
),
4943 TYPE_TARGET_TYPE (die
->type
) = die_type (die
, cu
);
4947 /* Find a representation of a given base type and install
4948 it in the TYPE field of the die. */
4951 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4953 struct objfile
*objfile
= cu
->objfile
;
4955 struct attribute
*attr
;
4956 int encoding
= 0, size
= 0;
4958 enum type_code code
= TYPE_CODE_INT
;
4960 struct type
*target_type
= NULL
;
4962 /* If we've already decoded this die, this is a no-op. */
4968 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
4971 encoding
= DW_UNSND (attr
);
4973 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4976 size
= DW_UNSND (attr
);
4978 name
= dwarf2_name (die
, cu
);
4981 complaint (&symfile_complaints
,
4982 _("DW_AT_name missing from DW_TAG_base_type"));
4987 case DW_ATE_address
:
4988 /* Turn DW_ATE_address into a void * pointer. */
4989 code
= TYPE_CODE_PTR
;
4990 type_flags
|= TYPE_FLAG_UNSIGNED
;
4991 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
4993 case DW_ATE_boolean
:
4994 code
= TYPE_CODE_BOOL
;
4995 type_flags
|= TYPE_FLAG_UNSIGNED
;
4997 case DW_ATE_complex_float
:
4998 code
= TYPE_CODE_COMPLEX
;
4999 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
5001 case DW_ATE_decimal_float
:
5002 code
= TYPE_CODE_DECFLOAT
;
5005 code
= TYPE_CODE_FLT
;
5009 case DW_ATE_unsigned
:
5010 type_flags
|= TYPE_FLAG_UNSIGNED
;
5012 case DW_ATE_signed_char
:
5013 if (cu
->language
== language_ada
|| cu
->language
== language_m2
)
5014 code
= TYPE_CODE_CHAR
;
5016 case DW_ATE_unsigned_char
:
5017 if (cu
->language
== language_ada
|| cu
->language
== language_m2
)
5018 code
= TYPE_CODE_CHAR
;
5019 type_flags
|= TYPE_FLAG_UNSIGNED
;
5022 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
5023 dwarf_type_encoding_name (encoding
));
5027 type
= init_type (code
, size
, type_flags
, name
, objfile
);
5028 TYPE_TARGET_TYPE (type
) = target_type
;
5030 set_die_type (die
, type
, cu
);
5033 /* Read the given DW_AT_subrange DIE. */
5036 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5038 struct type
*base_type
;
5039 struct type
*range_type
;
5040 struct attribute
*attr
;
5045 /* If we have already decoded this die, then nothing more to do. */
5049 base_type
= die_type (die
, cu
);
5050 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
5052 complaint (&symfile_complaints
,
5053 _("DW_AT_type missing from DW_TAG_subrange_type"));
5055 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (current_gdbarch
) / 8,
5056 0, NULL
, cu
->objfile
);
5059 if (cu
->language
== language_fortran
)
5061 /* FORTRAN implies a lower bound of 1, if not given. */
5065 /* FIXME: For variable sized arrays either of these could be
5066 a variable rather than a constant value. We'll allow it,
5067 but we don't know how to handle it. */
5068 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
5070 low
= dwarf2_get_attr_constant_value (attr
, 0);
5072 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
5075 if (attr
->form
== DW_FORM_block1
)
5077 /* GCC encodes arrays with unspecified or dynamic length
5078 with a DW_FORM_block1 attribute.
5079 FIXME: GDB does not yet know how to handle dynamic
5080 arrays properly, treat them as arrays with unspecified
5083 FIXME: jimb/2003-09-22: GDB does not really know
5084 how to handle arrays of unspecified length
5085 either; we just represent them as zero-length
5086 arrays. Choose an appropriate upper bound given
5087 the lower bound we've computed above. */
5091 high
= dwarf2_get_attr_constant_value (attr
, 1);
5094 range_type
= create_range_type (NULL
, base_type
, low
, high
);
5096 name
= dwarf2_name (die
, cu
);
5098 TYPE_NAME (range_type
) = name
;
5100 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5102 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
5104 set_die_type (die
, range_type
, cu
);
5108 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5115 /* For now, we only support the C meaning of an unspecified type: void. */
5117 type
= init_type (TYPE_CODE_VOID
, 0, 0, dwarf2_name (die
, cu
),
5120 set_die_type (die
, type
, cu
);
5123 /* Read a whole compilation unit into a linked list of dies. */
5125 static struct die_info
*
5126 read_comp_unit (gdb_byte
*info_ptr
, bfd
*abfd
, struct dwarf2_cu
*cu
)
5128 return read_die_and_children (info_ptr
, abfd
, cu
, &info_ptr
, NULL
);
5131 /* Read a single die and all its descendents. Set the die's sibling
5132 field to NULL; set other fields in the die correctly, and set all
5133 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
5134 location of the info_ptr after reading all of those dies. PARENT
5135 is the parent of the die in question. */
5137 static struct die_info
*
5138 read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
5139 struct dwarf2_cu
*cu
,
5140 gdb_byte
**new_info_ptr
,
5141 struct die_info
*parent
)
5143 struct die_info
*die
;
5147 cur_ptr
= read_full_die (&die
, abfd
, info_ptr
, cu
, &has_children
);
5148 store_in_ref_table (die
->offset
, die
, cu
);
5152 die
->child
= read_die_and_siblings (cur_ptr
, abfd
, cu
,
5158 *new_info_ptr
= cur_ptr
;
5161 die
->sibling
= NULL
;
5162 die
->parent
= parent
;
5166 /* Read a die, all of its descendents, and all of its siblings; set
5167 all of the fields of all of the dies correctly. Arguments are as
5168 in read_die_and_children. */
5170 static struct die_info
*
5171 read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
5172 struct dwarf2_cu
*cu
,
5173 gdb_byte
**new_info_ptr
,
5174 struct die_info
*parent
)
5176 struct die_info
*first_die
, *last_sibling
;
5180 first_die
= last_sibling
= NULL
;
5184 struct die_info
*die
5185 = read_die_and_children (cur_ptr
, abfd
, cu
, &cur_ptr
, parent
);
5193 last_sibling
->sibling
= die
;
5198 *new_info_ptr
= cur_ptr
;
5208 /* Free a linked list of dies. */
5211 free_die_list (struct die_info
*dies
)
5213 struct die_info
*die
, *next
;
5218 if (die
->child
!= NULL
)
5219 free_die_list (die
->child
);
5220 next
= die
->sibling
;
5227 /* Read the contents of the section at OFFSET and of size SIZE from the
5228 object file specified by OBJFILE into the objfile_obstack and return it. */
5231 dwarf2_read_section (struct objfile
*objfile
, asection
*sectp
)
5233 bfd
*abfd
= objfile
->obfd
;
5234 gdb_byte
*buf
, *retbuf
;
5235 bfd_size_type size
= bfd_get_section_size (sectp
);
5240 buf
= obstack_alloc (&objfile
->objfile_obstack
, size
);
5241 retbuf
= symfile_relocate_debug_section (abfd
, sectp
, buf
);
5245 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
5246 || bfd_bread (buf
, size
, abfd
) != size
)
5247 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5248 bfd_get_filename (abfd
));
5253 /* In DWARF version 2, the description of the debugging information is
5254 stored in a separate .debug_abbrev section. Before we read any
5255 dies from a section we read in all abbreviations and install them
5256 in a hash table. This function also sets flags in CU describing
5257 the data found in the abbrev table. */
5260 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
5262 struct comp_unit_head
*cu_header
= &cu
->header
;
5263 gdb_byte
*abbrev_ptr
;
5264 struct abbrev_info
*cur_abbrev
;
5265 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
5266 unsigned int abbrev_form
, hash_number
;
5267 struct attr_abbrev
*cur_attrs
;
5268 unsigned int allocated_attrs
;
5270 /* Initialize dwarf2 abbrevs */
5271 obstack_init (&cu
->abbrev_obstack
);
5272 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
5274 * sizeof (struct abbrev_info
*)));
5275 memset (cu
->dwarf2_abbrevs
, 0,
5276 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
5278 abbrev_ptr
= dwarf2_per_objfile
->abbrev_buffer
+ cu_header
->abbrev_offset
;
5279 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5280 abbrev_ptr
+= bytes_read
;
5282 allocated_attrs
= ATTR_ALLOC_CHUNK
;
5283 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
5285 /* loop until we reach an abbrev number of 0 */
5286 while (abbrev_number
)
5288 cur_abbrev
= dwarf_alloc_abbrev (cu
);
5290 /* read in abbrev header */
5291 cur_abbrev
->number
= abbrev_number
;
5292 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5293 abbrev_ptr
+= bytes_read
;
5294 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
5297 if (cur_abbrev
->tag
== DW_TAG_namespace
)
5298 cu
->has_namespace_info
= 1;
5300 /* now read in declarations */
5301 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5302 abbrev_ptr
+= bytes_read
;
5303 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5304 abbrev_ptr
+= bytes_read
;
5307 if (cur_abbrev
->num_attrs
== allocated_attrs
)
5309 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
5311 = xrealloc (cur_attrs
, (allocated_attrs
5312 * sizeof (struct attr_abbrev
)));
5315 /* Record whether this compilation unit might have
5316 inter-compilation-unit references. If we don't know what form
5317 this attribute will have, then it might potentially be a
5318 DW_FORM_ref_addr, so we conservatively expect inter-CU
5321 if (abbrev_form
== DW_FORM_ref_addr
5322 || abbrev_form
== DW_FORM_indirect
)
5323 cu
->has_form_ref_addr
= 1;
5325 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
5326 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
5327 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5328 abbrev_ptr
+= bytes_read
;
5329 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5330 abbrev_ptr
+= bytes_read
;
5333 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
5334 (cur_abbrev
->num_attrs
5335 * sizeof (struct attr_abbrev
)));
5336 memcpy (cur_abbrev
->attrs
, cur_attrs
,
5337 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
5339 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
5340 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
5341 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
5343 /* Get next abbreviation.
5344 Under Irix6 the abbreviations for a compilation unit are not
5345 always properly terminated with an abbrev number of 0.
5346 Exit loop if we encounter an abbreviation which we have
5347 already read (which means we are about to read the abbreviations
5348 for the next compile unit) or if the end of the abbreviation
5349 table is reached. */
5350 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev_buffer
)
5351 >= dwarf2_per_objfile
->abbrev_size
)
5353 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5354 abbrev_ptr
+= bytes_read
;
5355 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
5362 /* Release the memory used by the abbrev table for a compilation unit. */
5365 dwarf2_free_abbrev_table (void *ptr_to_cu
)
5367 struct dwarf2_cu
*cu
= ptr_to_cu
;
5369 obstack_free (&cu
->abbrev_obstack
, NULL
);
5370 cu
->dwarf2_abbrevs
= NULL
;
5373 /* Lookup an abbrev_info structure in the abbrev hash table. */
5375 static struct abbrev_info
*
5376 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
5378 unsigned int hash_number
;
5379 struct abbrev_info
*abbrev
;
5381 hash_number
= number
% ABBREV_HASH_SIZE
;
5382 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
5386 if (abbrev
->number
== number
)
5389 abbrev
= abbrev
->next
;
5394 /* Returns nonzero if TAG represents a type that we might generate a partial
5398 is_type_tag_for_partial (int tag
)
5403 /* Some types that would be reasonable to generate partial symbols for,
5404 that we don't at present. */
5405 case DW_TAG_array_type
:
5406 case DW_TAG_file_type
:
5407 case DW_TAG_ptr_to_member_type
:
5408 case DW_TAG_set_type
:
5409 case DW_TAG_string_type
:
5410 case DW_TAG_subroutine_type
:
5412 case DW_TAG_base_type
:
5413 case DW_TAG_class_type
:
5414 case DW_TAG_interface_type
:
5415 case DW_TAG_enumeration_type
:
5416 case DW_TAG_structure_type
:
5417 case DW_TAG_subrange_type
:
5418 case DW_TAG_typedef
:
5419 case DW_TAG_union_type
:
5426 /* Load all DIEs that are interesting for partial symbols into memory. */
5428 static struct partial_die_info
*
5429 load_partial_dies (bfd
*abfd
, gdb_byte
*info_ptr
, int building_psymtab
,
5430 struct dwarf2_cu
*cu
)
5432 struct partial_die_info
*part_die
;
5433 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
5434 struct abbrev_info
*abbrev
;
5435 unsigned int bytes_read
;
5436 unsigned int load_all
= 0;
5438 int nesting_level
= 1;
5443 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
5447 = htab_create_alloc_ex (cu
->header
.length
/ 12,
5451 &cu
->comp_unit_obstack
,
5452 hashtab_obstack_allocate
,
5453 dummy_obstack_deallocate
);
5455 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5456 sizeof (struct partial_die_info
));
5460 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
5462 /* A NULL abbrev means the end of a series of children. */
5465 if (--nesting_level
== 0)
5467 /* PART_DIE was probably the last thing allocated on the
5468 comp_unit_obstack, so we could call obstack_free
5469 here. We don't do that because the waste is small,
5470 and will be cleaned up when we're done with this
5471 compilation unit. This way, we're also more robust
5472 against other users of the comp_unit_obstack. */
5475 info_ptr
+= bytes_read
;
5476 last_die
= parent_die
;
5477 parent_die
= parent_die
->die_parent
;
5481 /* Check whether this DIE is interesting enough to save. Normally
5482 we would not be interested in members here, but there may be
5483 later variables referencing them via DW_AT_specification (for
5486 && !is_type_tag_for_partial (abbrev
->tag
)
5487 && abbrev
->tag
!= DW_TAG_enumerator
5488 && abbrev
->tag
!= DW_TAG_subprogram
5489 && abbrev
->tag
!= DW_TAG_variable
5490 && abbrev
->tag
!= DW_TAG_namespace
5491 && abbrev
->tag
!= DW_TAG_member
)
5493 /* Otherwise we skip to the next sibling, if any. */
5494 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
5498 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
,
5499 abfd
, info_ptr
, cu
);
5501 /* This two-pass algorithm for processing partial symbols has a
5502 high cost in cache pressure. Thus, handle some simple cases
5503 here which cover the majority of C partial symbols. DIEs
5504 which neither have specification tags in them, nor could have
5505 specification tags elsewhere pointing at them, can simply be
5506 processed and discarded.
5508 This segment is also optional; scan_partial_symbols and
5509 add_partial_symbol will handle these DIEs if we chain
5510 them in normally. When compilers which do not emit large
5511 quantities of duplicate debug information are more common,
5512 this code can probably be removed. */
5514 /* Any complete simple types at the top level (pretty much all
5515 of them, for a language without namespaces), can be processed
5517 if (parent_die
== NULL
5518 && part_die
->has_specification
== 0
5519 && part_die
->is_declaration
== 0
5520 && (part_die
->tag
== DW_TAG_typedef
5521 || part_die
->tag
== DW_TAG_base_type
5522 || part_die
->tag
== DW_TAG_subrange_type
))
5524 if (building_psymtab
&& part_die
->name
!= NULL
)
5525 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5526 VAR_DOMAIN
, LOC_TYPEDEF
,
5527 &cu
->objfile
->static_psymbols
,
5528 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5529 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5533 /* If we're at the second level, and we're an enumerator, and
5534 our parent has no specification (meaning possibly lives in a
5535 namespace elsewhere), then we can add the partial symbol now
5536 instead of queueing it. */
5537 if (part_die
->tag
== DW_TAG_enumerator
5538 && parent_die
!= NULL
5539 && parent_die
->die_parent
== NULL
5540 && parent_die
->tag
== DW_TAG_enumeration_type
5541 && parent_die
->has_specification
== 0)
5543 if (part_die
->name
== NULL
)
5544 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
5545 else if (building_psymtab
)
5546 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5547 VAR_DOMAIN
, LOC_CONST
,
5548 (cu
->language
== language_cplus
5549 || cu
->language
== language_java
)
5550 ? &cu
->objfile
->global_psymbols
5551 : &cu
->objfile
->static_psymbols
,
5552 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5554 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5558 /* We'll save this DIE so link it in. */
5559 part_die
->die_parent
= parent_die
;
5560 part_die
->die_sibling
= NULL
;
5561 part_die
->die_child
= NULL
;
5563 if (last_die
&& last_die
== parent_die
)
5564 last_die
->die_child
= part_die
;
5566 last_die
->die_sibling
= part_die
;
5568 last_die
= part_die
;
5570 if (first_die
== NULL
)
5571 first_die
= part_die
;
5573 /* Maybe add the DIE to the hash table. Not all DIEs that we
5574 find interesting need to be in the hash table, because we
5575 also have the parent/sibling/child chains; only those that we
5576 might refer to by offset later during partial symbol reading.
5578 For now this means things that might have be the target of a
5579 DW_AT_specification, DW_AT_abstract_origin, or
5580 DW_AT_extension. DW_AT_extension will refer only to
5581 namespaces; DW_AT_abstract_origin refers to functions (and
5582 many things under the function DIE, but we do not recurse
5583 into function DIEs during partial symbol reading) and
5584 possibly variables as well; DW_AT_specification refers to
5585 declarations. Declarations ought to have the DW_AT_declaration
5586 flag. It happens that GCC forgets to put it in sometimes, but
5587 only for functions, not for types.
5589 Adding more things than necessary to the hash table is harmless
5590 except for the performance cost. Adding too few will result in
5591 wasted time in find_partial_die, when we reread the compilation
5592 unit with load_all_dies set. */
5595 || abbrev
->tag
== DW_TAG_subprogram
5596 || abbrev
->tag
== DW_TAG_variable
5597 || abbrev
->tag
== DW_TAG_namespace
5598 || part_die
->is_declaration
)
5602 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
5603 part_die
->offset
, INSERT
);
5607 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5608 sizeof (struct partial_die_info
));
5610 /* For some DIEs we want to follow their children (if any). For C
5611 we have no reason to follow the children of structures; for other
5612 languages we have to, both so that we can get at method physnames
5613 to infer fully qualified class names, and for DW_AT_specification. */
5614 if (last_die
->has_children
5616 || last_die
->tag
== DW_TAG_namespace
5617 || last_die
->tag
== DW_TAG_enumeration_type
5618 || (cu
->language
!= language_c
5619 && (last_die
->tag
== DW_TAG_class_type
5620 || last_die
->tag
== DW_TAG_interface_type
5621 || last_die
->tag
== DW_TAG_structure_type
5622 || last_die
->tag
== DW_TAG_union_type
))))
5625 parent_die
= last_die
;
5629 /* Otherwise we skip to the next sibling, if any. */
5630 info_ptr
= locate_pdi_sibling (last_die
, info_ptr
, abfd
, cu
);
5632 /* Back to the top, do it again. */
5636 /* Read a minimal amount of information into the minimal die structure. */
5639 read_partial_die (struct partial_die_info
*part_die
,
5640 struct abbrev_info
*abbrev
,
5641 unsigned int abbrev_len
, bfd
*abfd
,
5642 gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
5644 unsigned int bytes_read
, i
;
5645 struct attribute attr
;
5646 int has_low_pc_attr
= 0;
5647 int has_high_pc_attr
= 0;
5649 memset (part_die
, 0, sizeof (struct partial_die_info
));
5651 part_die
->offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5653 info_ptr
+= abbrev_len
;
5658 part_die
->tag
= abbrev
->tag
;
5659 part_die
->has_children
= abbrev
->has_children
;
5661 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5663 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
5665 /* Store the data if it is of an attribute we want to keep in a
5666 partial symbol table. */
5671 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
5672 if (part_die
->name
== NULL
)
5673 part_die
->name
= DW_STRING (&attr
);
5675 case DW_AT_comp_dir
:
5676 if (part_die
->dirname
== NULL
)
5677 part_die
->dirname
= DW_STRING (&attr
);
5679 case DW_AT_MIPS_linkage_name
:
5680 part_die
->name
= DW_STRING (&attr
);
5683 has_low_pc_attr
= 1;
5684 part_die
->lowpc
= DW_ADDR (&attr
);
5687 has_high_pc_attr
= 1;
5688 part_die
->highpc
= DW_ADDR (&attr
);
5691 if (dwarf2_ranges_read (DW_UNSND (&attr
), &part_die
->lowpc
,
5692 &part_die
->highpc
, cu
))
5693 has_low_pc_attr
= has_high_pc_attr
= 1;
5695 case DW_AT_location
:
5696 /* Support the .debug_loc offsets */
5697 if (attr_form_is_block (&attr
))
5699 part_die
->locdesc
= DW_BLOCK (&attr
);
5701 else if (attr_form_is_section_offset (&attr
))
5703 dwarf2_complex_location_expr_complaint ();
5707 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5708 "partial symbol information");
5711 case DW_AT_language
:
5712 part_die
->language
= DW_UNSND (&attr
);
5714 case DW_AT_external
:
5715 part_die
->is_external
= DW_UNSND (&attr
);
5717 case DW_AT_declaration
:
5718 part_die
->is_declaration
= DW_UNSND (&attr
);
5721 part_die
->has_type
= 1;
5723 case DW_AT_abstract_origin
:
5724 case DW_AT_specification
:
5725 case DW_AT_extension
:
5726 part_die
->has_specification
= 1;
5727 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
, cu
);
5730 /* Ignore absolute siblings, they might point outside of
5731 the current compile unit. */
5732 if (attr
.form
== DW_FORM_ref_addr
)
5733 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
5735 part_die
->sibling
= dwarf2_per_objfile
->info_buffer
5736 + dwarf2_get_ref_die_offset (&attr
, cu
);
5738 case DW_AT_stmt_list
:
5739 part_die
->has_stmt_list
= 1;
5740 part_die
->line_offset
= DW_UNSND (&attr
);
5742 case DW_AT_byte_size
:
5743 part_die
->has_byte_size
= 1;
5745 case DW_AT_calling_convention
:
5746 /* DWARF doesn't provide a way to identify a program's source-level
5747 entry point. DW_AT_calling_convention attributes are only meant
5748 to describe functions' calling conventions.
5750 However, because it's a necessary piece of information in
5751 Fortran, and because DW_CC_program is the only piece of debugging
5752 information whose definition refers to a 'main program' at all,
5753 several compilers have begun marking Fortran main programs with
5754 DW_CC_program --- even when those functions use the standard
5755 calling conventions.
5757 So until DWARF specifies a way to provide this information and
5758 compilers pick up the new representation, we'll support this
5760 if (DW_UNSND (&attr
) == DW_CC_program
5761 && cu
->language
== language_fortran
)
5762 set_main_name (part_die
->name
);
5769 /* When using the GNU linker, .gnu.linkonce. sections are used to
5770 eliminate duplicate copies of functions and vtables and such.
5771 The linker will arbitrarily choose one and discard the others.
5772 The AT_*_pc values for such functions refer to local labels in
5773 these sections. If the section from that file was discarded, the
5774 labels are not in the output, so the relocs get a value of 0.
5775 If this is a discarded function, mark the pc bounds as invalid,
5776 so that GDB will ignore it. */
5777 if (has_low_pc_attr
&& has_high_pc_attr
5778 && part_die
->lowpc
< part_die
->highpc
5779 && (part_die
->lowpc
!= 0
5780 || dwarf2_per_objfile
->has_section_at_zero
))
5781 part_die
->has_pc_info
= 1;
5785 /* Find a cached partial DIE at OFFSET in CU. */
5787 static struct partial_die_info
*
5788 find_partial_die_in_comp_unit (unsigned long offset
, struct dwarf2_cu
*cu
)
5790 struct partial_die_info
*lookup_die
= NULL
;
5791 struct partial_die_info part_die
;
5793 part_die
.offset
= offset
;
5794 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
5799 /* Find a partial DIE at OFFSET, which may or may not be in CU. */
5801 static struct partial_die_info
*
5802 find_partial_die (unsigned long offset
, struct dwarf2_cu
*cu
)
5804 struct dwarf2_per_cu_data
*per_cu
= NULL
;
5805 struct partial_die_info
*pd
= NULL
;
5807 if (offset
>= cu
->header
.offset
5808 && offset
< cu
->header
.offset
+ cu
->header
.length
)
5810 pd
= find_partial_die_in_comp_unit (offset
, cu
);
5815 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
5817 if (per_cu
->cu
== NULL
)
5819 load_comp_unit (per_cu
, cu
->objfile
);
5820 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5821 dwarf2_per_objfile
->read_in_chain
= per_cu
;
5824 per_cu
->cu
->last_used
= 0;
5825 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5827 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
5829 struct cleanup
*back_to
;
5830 struct partial_die_info comp_unit_die
;
5831 struct abbrev_info
*abbrev
;
5832 unsigned int bytes_read
;
5835 per_cu
->load_all_dies
= 1;
5837 /* Re-read the DIEs. */
5838 back_to
= make_cleanup (null_cleanup
, 0);
5839 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
5841 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
5842 back_to
= make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
5844 info_ptr
= per_cu
->cu
->header
.first_die_ptr
;
5845 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
5846 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
5847 per_cu
->cu
->objfile
->obfd
, info_ptr
,
5849 if (comp_unit_die
.has_children
)
5850 load_partial_dies (per_cu
->cu
->objfile
->obfd
, info_ptr
, 0, per_cu
->cu
);
5851 do_cleanups (back_to
);
5853 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5857 internal_error (__FILE__
, __LINE__
,
5858 _("could not find partial DIE 0x%lx in cache [from module %s]\n"),
5859 offset
, bfd_get_filename (cu
->objfile
->obfd
));
5863 /* Adjust PART_DIE before generating a symbol for it. This function
5864 may set the is_external flag or change the DIE's name. */
5867 fixup_partial_die (struct partial_die_info
*part_die
,
5868 struct dwarf2_cu
*cu
)
5870 /* If we found a reference attribute and the DIE has no name, try
5871 to find a name in the referred to DIE. */
5873 if (part_die
->name
== NULL
&& part_die
->has_specification
)
5875 struct partial_die_info
*spec_die
;
5877 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
5879 fixup_partial_die (spec_die
, cu
);
5883 part_die
->name
= spec_die
->name
;
5885 /* Copy DW_AT_external attribute if it is set. */
5886 if (spec_die
->is_external
)
5887 part_die
->is_external
= spec_die
->is_external
;
5891 /* Set default names for some unnamed DIEs. */
5892 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
5893 || part_die
->tag
== DW_TAG_class_type
))
5894 part_die
->name
= "(anonymous class)";
5896 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
5897 part_die
->name
= "(anonymous namespace)";
5899 if (part_die
->tag
== DW_TAG_structure_type
5900 || part_die
->tag
== DW_TAG_class_type
5901 || part_die
->tag
== DW_TAG_union_type
)
5902 guess_structure_name (part_die
, cu
);
5905 /* Read the die from the .debug_info section buffer. Set DIEP to
5906 point to a newly allocated die with its information, except for its
5907 child, sibling, and parent fields. Set HAS_CHILDREN to tell
5908 whether the die has children or not. */
5911 read_full_die (struct die_info
**diep
, bfd
*abfd
, gdb_byte
*info_ptr
,
5912 struct dwarf2_cu
*cu
, int *has_children
)
5914 unsigned int abbrev_number
, bytes_read
, i
, offset
;
5915 struct abbrev_info
*abbrev
;
5916 struct die_info
*die
;
5918 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5919 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5920 info_ptr
+= bytes_read
;
5923 die
= dwarf_alloc_die ();
5925 die
->abbrev
= abbrev_number
;
5932 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
5935 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
5937 bfd_get_filename (abfd
));
5939 die
= dwarf_alloc_die ();
5940 die
->offset
= offset
;
5941 die
->tag
= abbrev
->tag
;
5942 die
->abbrev
= abbrev_number
;
5945 die
->num_attrs
= abbrev
->num_attrs
;
5946 die
->attrs
= (struct attribute
*)
5947 xmalloc (die
->num_attrs
* sizeof (struct attribute
));
5949 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5951 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
5952 abfd
, info_ptr
, cu
);
5954 /* If this attribute is an absolute reference to a different
5955 compilation unit, make sure that compilation unit is loaded
5957 if (die
->attrs
[i
].form
== DW_FORM_ref_addr
5958 && (DW_ADDR (&die
->attrs
[i
]) < cu
->header
.offset
5959 || (DW_ADDR (&die
->attrs
[i
])
5960 >= cu
->header
.offset
+ cu
->header
.length
)))
5962 struct dwarf2_per_cu_data
*per_cu
;
5963 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (&die
->attrs
[i
]),
5966 /* Mark the dependence relation so that we don't flush PER_CU
5968 dwarf2_add_dependence (cu
, per_cu
);
5970 /* If it's already on the queue, we have nothing to do. */
5974 /* If the compilation unit is already loaded, just mark it as
5976 if (per_cu
->cu
!= NULL
)
5978 per_cu
->cu
->last_used
= 0;
5982 /* Add it to the queue. */
5983 queue_comp_unit (per_cu
);
5988 *has_children
= abbrev
->has_children
;
5992 /* Read an attribute value described by an attribute form. */
5995 read_attribute_value (struct attribute
*attr
, unsigned form
,
5996 bfd
*abfd
, gdb_byte
*info_ptr
,
5997 struct dwarf2_cu
*cu
)
5999 struct comp_unit_head
*cu_header
= &cu
->header
;
6000 unsigned int bytes_read
;
6001 struct dwarf_block
*blk
;
6007 case DW_FORM_ref_addr
:
6008 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
6009 info_ptr
+= bytes_read
;
6011 case DW_FORM_block2
:
6012 blk
= dwarf_alloc_block (cu
);
6013 blk
->size
= read_2_bytes (abfd
, info_ptr
);
6015 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6016 info_ptr
+= blk
->size
;
6017 DW_BLOCK (attr
) = blk
;
6019 case DW_FORM_block4
:
6020 blk
= dwarf_alloc_block (cu
);
6021 blk
->size
= read_4_bytes (abfd
, info_ptr
);
6023 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6024 info_ptr
+= blk
->size
;
6025 DW_BLOCK (attr
) = blk
;
6028 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
6032 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
6036 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
6039 case DW_FORM_string
:
6040 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
6041 info_ptr
+= bytes_read
;
6044 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
6046 info_ptr
+= bytes_read
;
6049 blk
= dwarf_alloc_block (cu
);
6050 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6051 info_ptr
+= bytes_read
;
6052 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6053 info_ptr
+= blk
->size
;
6054 DW_BLOCK (attr
) = blk
;
6056 case DW_FORM_block1
:
6057 blk
= dwarf_alloc_block (cu
);
6058 blk
->size
= read_1_byte (abfd
, info_ptr
);
6060 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6061 info_ptr
+= blk
->size
;
6062 DW_BLOCK (attr
) = blk
;
6065 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
6069 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
6073 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
6074 info_ptr
+= bytes_read
;
6077 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6078 info_ptr
+= bytes_read
;
6081 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
6085 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
6089 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
6093 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
6096 case DW_FORM_ref_udata
:
6097 DW_ADDR (attr
) = (cu
->header
.offset
6098 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
6099 info_ptr
+= bytes_read
;
6101 case DW_FORM_indirect
:
6102 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6103 info_ptr
+= bytes_read
;
6104 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
6107 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
6108 dwarf_form_name (form
),
6109 bfd_get_filename (abfd
));
6114 /* Read an attribute described by an abbreviated attribute. */
6117 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
6118 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6120 attr
->name
= abbrev
->name
;
6121 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
6124 /* read dwarf information from a buffer */
6127 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
6129 return bfd_get_8 (abfd
, buf
);
6133 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
6135 return bfd_get_signed_8 (abfd
, buf
);
6139 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
6141 return bfd_get_16 (abfd
, buf
);
6145 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6147 return bfd_get_signed_16 (abfd
, buf
);
6151 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
6153 return bfd_get_32 (abfd
, buf
);
6157 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6159 return bfd_get_signed_32 (abfd
, buf
);
6162 static unsigned long
6163 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
6165 return bfd_get_64 (abfd
, buf
);
6169 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
6170 unsigned int *bytes_read
)
6172 struct comp_unit_head
*cu_header
= &cu
->header
;
6173 CORE_ADDR retval
= 0;
6175 if (cu_header
->signed_addr_p
)
6177 switch (cu_header
->addr_size
)
6180 retval
= bfd_get_signed_16 (abfd
, buf
);
6183 retval
= bfd_get_signed_32 (abfd
, buf
);
6186 retval
= bfd_get_signed_64 (abfd
, buf
);
6189 internal_error (__FILE__
, __LINE__
,
6190 _("read_address: bad switch, signed [in module %s]"),
6191 bfd_get_filename (abfd
));
6196 switch (cu_header
->addr_size
)
6199 retval
= bfd_get_16 (abfd
, buf
);
6202 retval
= bfd_get_32 (abfd
, buf
);
6205 retval
= bfd_get_64 (abfd
, buf
);
6208 internal_error (__FILE__
, __LINE__
,
6209 _("read_address: bad switch, unsigned [in module %s]"),
6210 bfd_get_filename (abfd
));
6214 *bytes_read
= cu_header
->addr_size
;
6218 /* Read the initial length from a section. The (draft) DWARF 3
6219 specification allows the initial length to take up either 4 bytes
6220 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
6221 bytes describe the length and all offsets will be 8 bytes in length
6224 An older, non-standard 64-bit format is also handled by this
6225 function. The older format in question stores the initial length
6226 as an 8-byte quantity without an escape value. Lengths greater
6227 than 2^32 aren't very common which means that the initial 4 bytes
6228 is almost always zero. Since a length value of zero doesn't make
6229 sense for the 32-bit format, this initial zero can be considered to
6230 be an escape value which indicates the presence of the older 64-bit
6231 format. As written, the code can't detect (old format) lengths
6232 greater than 4GB. If it becomes necessary to handle lengths
6233 somewhat larger than 4GB, we could allow other small values (such
6234 as the non-sensical values of 1, 2, and 3) to also be used as
6235 escape values indicating the presence of the old format.
6237 The value returned via bytes_read should be used to increment the
6238 relevant pointer after calling read_initial_length().
6240 As a side effect, this function sets the fields initial_length_size
6241 and offset_size in cu_header to the values appropriate for the
6242 length field. (The format of the initial length field determines
6243 the width of file offsets to be fetched later with read_offset().)
6245 [ Note: read_initial_length() and read_offset() are based on the
6246 document entitled "DWARF Debugging Information Format", revision
6247 3, draft 8, dated November 19, 2001. This document was obtained
6250 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
6252 This document is only a draft and is subject to change. (So beware.)
6254 Details regarding the older, non-standard 64-bit format were
6255 determined empirically by examining 64-bit ELF files produced by
6256 the SGI toolchain on an IRIX 6.5 machine.
6258 - Kevin, July 16, 2002
6262 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, struct comp_unit_head
*cu_header
,
6263 unsigned int *bytes_read
)
6265 LONGEST length
= bfd_get_32 (abfd
, buf
);
6267 if (length
== 0xffffffff)
6269 length
= bfd_get_64 (abfd
, buf
+ 4);
6272 else if (length
== 0)
6274 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
6275 length
= bfd_get_64 (abfd
, buf
);
6285 gdb_assert (cu_header
->initial_length_size
== 0
6286 || cu_header
->initial_length_size
== 4
6287 || cu_header
->initial_length_size
== 8
6288 || cu_header
->initial_length_size
== 12);
6290 if (cu_header
->initial_length_size
!= 0
6291 && cu_header
->initial_length_size
!= *bytes_read
)
6292 complaint (&symfile_complaints
,
6293 _("intermixed 32-bit and 64-bit DWARF sections"));
6295 cu_header
->initial_length_size
= *bytes_read
;
6296 cu_header
->offset_size
= (*bytes_read
== 4) ? 4 : 8;
6302 /* Read an offset from the data stream. The size of the offset is
6303 given by cu_header->offset_size. */
6306 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
6307 unsigned int *bytes_read
)
6311 switch (cu_header
->offset_size
)
6314 retval
= bfd_get_32 (abfd
, buf
);
6318 retval
= bfd_get_64 (abfd
, buf
);
6322 internal_error (__FILE__
, __LINE__
,
6323 _("read_offset: bad switch [in module %s]"),
6324 bfd_get_filename (abfd
));
6331 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
6333 /* If the size of a host char is 8 bits, we can return a pointer
6334 to the buffer, otherwise we have to copy the data to a buffer
6335 allocated on the temporary obstack. */
6336 gdb_assert (HOST_CHAR_BIT
== 8);
6341 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6343 /* If the size of a host char is 8 bits, we can return a pointer
6344 to the string, otherwise we have to copy the string to a buffer
6345 allocated on the temporary obstack. */
6346 gdb_assert (HOST_CHAR_BIT
== 8);
6349 *bytes_read_ptr
= 1;
6352 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
6353 return (char *) buf
;
6357 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
6358 const struct comp_unit_head
*cu_header
,
6359 unsigned int *bytes_read_ptr
)
6361 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
,
6364 if (dwarf2_per_objfile
->str_buffer
== NULL
)
6366 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
6367 bfd_get_filename (abfd
));
6370 if (str_offset
>= dwarf2_per_objfile
->str_size
)
6372 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
6373 bfd_get_filename (abfd
));
6376 gdb_assert (HOST_CHAR_BIT
== 8);
6377 if (dwarf2_per_objfile
->str_buffer
[str_offset
] == '\0')
6379 return (char *) (dwarf2_per_objfile
->str_buffer
+ str_offset
);
6382 static unsigned long
6383 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6385 unsigned long result
;
6386 unsigned int num_read
;
6396 byte
= bfd_get_8 (abfd
, buf
);
6399 result
|= ((unsigned long)(byte
& 127) << shift
);
6400 if ((byte
& 128) == 0)
6406 *bytes_read_ptr
= num_read
;
6411 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6414 int i
, shift
, num_read
;
6423 byte
= bfd_get_8 (abfd
, buf
);
6426 result
|= ((long)(byte
& 127) << shift
);
6428 if ((byte
& 128) == 0)
6433 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
6434 result
|= -(((long)1) << shift
);
6435 *bytes_read_ptr
= num_read
;
6439 /* Return a pointer to just past the end of an LEB128 number in BUF. */
6442 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
6448 byte
= bfd_get_8 (abfd
, buf
);
6450 if ((byte
& 128) == 0)
6456 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
6462 cu
->language
= language_c
;
6464 case DW_LANG_C_plus_plus
:
6465 cu
->language
= language_cplus
;
6467 case DW_LANG_Fortran77
:
6468 case DW_LANG_Fortran90
:
6469 case DW_LANG_Fortran95
:
6470 cu
->language
= language_fortran
;
6472 case DW_LANG_Mips_Assembler
:
6473 cu
->language
= language_asm
;
6476 cu
->language
= language_java
;
6480 cu
->language
= language_ada
;
6482 case DW_LANG_Modula2
:
6483 cu
->language
= language_m2
;
6485 case DW_LANG_Pascal83
:
6486 cu
->language
= language_pascal
;
6488 case DW_LANG_Cobol74
:
6489 case DW_LANG_Cobol85
:
6491 cu
->language
= language_minimal
;
6494 cu
->language_defn
= language_def (cu
->language
);
6497 /* Return the named attribute or NULL if not there. */
6499 static struct attribute
*
6500 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
6503 struct attribute
*spec
= NULL
;
6505 for (i
= 0; i
< die
->num_attrs
; ++i
)
6507 if (die
->attrs
[i
].name
== name
)
6508 return &die
->attrs
[i
];
6509 if (die
->attrs
[i
].name
== DW_AT_specification
6510 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
6511 spec
= &die
->attrs
[i
];
6515 return dwarf2_attr (follow_die_ref (die
, spec
, cu
), name
, cu
);
6520 /* Return non-zero iff the attribute NAME is defined for the given DIE,
6521 and holds a non-zero value. This function should only be used for
6522 DW_FORM_flag attributes. */
6525 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
6527 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
6529 return (attr
&& DW_UNSND (attr
));
6533 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
6535 /* A DIE is a declaration if it has a DW_AT_declaration attribute
6536 which value is non-zero. However, we have to be careful with
6537 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
6538 (via dwarf2_flag_true_p) follows this attribute. So we may
6539 end up accidently finding a declaration attribute that belongs
6540 to a different DIE referenced by the specification attribute,
6541 even though the given DIE does not have a declaration attribute. */
6542 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
6543 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
6546 /* Return the die giving the specification for DIE, if there is
6549 static struct die_info
*
6550 die_specification (struct die_info
*die
, struct dwarf2_cu
*cu
)
6552 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
, cu
);
6554 if (spec_attr
== NULL
)
6557 return follow_die_ref (die
, spec_attr
, cu
);
6560 /* Free the line_header structure *LH, and any arrays and strings it
6563 free_line_header (struct line_header
*lh
)
6565 if (lh
->standard_opcode_lengths
)
6566 xfree (lh
->standard_opcode_lengths
);
6568 /* Remember that all the lh->file_names[i].name pointers are
6569 pointers into debug_line_buffer, and don't need to be freed. */
6571 xfree (lh
->file_names
);
6573 /* Similarly for the include directory names. */
6574 if (lh
->include_dirs
)
6575 xfree (lh
->include_dirs
);
6581 /* Add an entry to LH's include directory table. */
6583 add_include_dir (struct line_header
*lh
, char *include_dir
)
6585 /* Grow the array if necessary. */
6586 if (lh
->include_dirs_size
== 0)
6588 lh
->include_dirs_size
= 1; /* for testing */
6589 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
6590 * sizeof (*lh
->include_dirs
));
6592 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
6594 lh
->include_dirs_size
*= 2;
6595 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
6596 (lh
->include_dirs_size
6597 * sizeof (*lh
->include_dirs
)));
6600 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
6604 /* Add an entry to LH's file name table. */
6606 add_file_name (struct line_header
*lh
,
6608 unsigned int dir_index
,
6609 unsigned int mod_time
,
6610 unsigned int length
)
6612 struct file_entry
*fe
;
6614 /* Grow the array if necessary. */
6615 if (lh
->file_names_size
== 0)
6617 lh
->file_names_size
= 1; /* for testing */
6618 lh
->file_names
= xmalloc (lh
->file_names_size
6619 * sizeof (*lh
->file_names
));
6621 else if (lh
->num_file_names
>= lh
->file_names_size
)
6623 lh
->file_names_size
*= 2;
6624 lh
->file_names
= xrealloc (lh
->file_names
,
6625 (lh
->file_names_size
6626 * sizeof (*lh
->file_names
)));
6629 fe
= &lh
->file_names
[lh
->num_file_names
++];
6631 fe
->dir_index
= dir_index
;
6632 fe
->mod_time
= mod_time
;
6633 fe
->length
= length
;
6639 /* Read the statement program header starting at OFFSET in
6640 .debug_line, according to the endianness of ABFD. Return a pointer
6641 to a struct line_header, allocated using xmalloc.
6643 NOTE: the strings in the include directory and file name tables of
6644 the returned object point into debug_line_buffer, and must not be
6646 static struct line_header
*
6647 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
6648 struct dwarf2_cu
*cu
)
6650 struct cleanup
*back_to
;
6651 struct line_header
*lh
;
6653 unsigned int bytes_read
;
6655 char *cur_dir
, *cur_file
;
6657 if (dwarf2_per_objfile
->line_buffer
== NULL
)
6659 complaint (&symfile_complaints
, _("missing .debug_line section"));
6663 /* Make sure that at least there's room for the total_length field.
6664 That could be 12 bytes long, but we're just going to fudge that. */
6665 if (offset
+ 4 >= dwarf2_per_objfile
->line_size
)
6667 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6671 lh
= xmalloc (sizeof (*lh
));
6672 memset (lh
, 0, sizeof (*lh
));
6673 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
6676 line_ptr
= dwarf2_per_objfile
->line_buffer
+ offset
;
6678 /* Read in the header. */
6680 read_initial_length (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6681 line_ptr
+= bytes_read
;
6682 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line_buffer
6683 + dwarf2_per_objfile
->line_size
))
6685 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6688 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
6689 lh
->version
= read_2_bytes (abfd
, line_ptr
);
6691 lh
->header_length
= read_offset (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6692 line_ptr
+= bytes_read
;
6693 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
6695 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
6697 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
6699 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
6701 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
6703 lh
->standard_opcode_lengths
6704 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
6706 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
6707 for (i
= 1; i
< lh
->opcode_base
; ++i
)
6709 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
6713 /* Read directory table. */
6714 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6716 line_ptr
+= bytes_read
;
6717 add_include_dir (lh
, cur_dir
);
6719 line_ptr
+= bytes_read
;
6721 /* Read file name table. */
6722 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6724 unsigned int dir_index
, mod_time
, length
;
6726 line_ptr
+= bytes_read
;
6727 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6728 line_ptr
+= bytes_read
;
6729 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6730 line_ptr
+= bytes_read
;
6731 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6732 line_ptr
+= bytes_read
;
6734 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6736 line_ptr
+= bytes_read
;
6737 lh
->statement_program_start
= line_ptr
;
6739 if (line_ptr
> (dwarf2_per_objfile
->line_buffer
6740 + dwarf2_per_objfile
->line_size
))
6741 complaint (&symfile_complaints
,
6742 _("line number info header doesn't fit in `.debug_line' section"));
6744 discard_cleanups (back_to
);
6748 /* This function exists to work around a bug in certain compilers
6749 (particularly GCC 2.95), in which the first line number marker of a
6750 function does not show up until after the prologue, right before
6751 the second line number marker. This function shifts ADDRESS down
6752 to the beginning of the function if necessary, and is called on
6753 addresses passed to record_line. */
6756 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
6758 struct function_range
*fn
;
6760 /* Find the function_range containing address. */
6765 cu
->cached_fn
= cu
->first_fn
;
6769 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6775 while (fn
&& fn
!= cu
->cached_fn
)
6776 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6786 if (address
!= fn
->lowpc
)
6787 complaint (&symfile_complaints
,
6788 _("misplaced first line number at 0x%lx for '%s'"),
6789 (unsigned long) address
, fn
->name
);
6794 /* Decode the Line Number Program (LNP) for the given line_header
6795 structure and CU. The actual information extracted and the type
6796 of structures created from the LNP depends on the value of PST.
6798 1. If PST is NULL, then this procedure uses the data from the program
6799 to create all necessary symbol tables, and their linetables.
6800 The compilation directory of the file is passed in COMP_DIR,
6801 and must not be NULL.
6803 2. If PST is not NULL, this procedure reads the program to determine
6804 the list of files included by the unit represented by PST, and
6805 builds all the associated partial symbol tables. In this case,
6806 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
6807 is not used to compute the full name of the symtab, and therefore
6808 omitting it when building the partial symtab does not introduce
6809 the potential for inconsistency - a partial symtab and its associated
6810 symbtab having a different fullname -). */
6813 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
6814 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
6816 gdb_byte
*line_ptr
, *extended_end
;
6818 unsigned int bytes_read
, extended_len
;
6819 unsigned char op_code
, extended_op
, adj_opcode
;
6821 struct objfile
*objfile
= cu
->objfile
;
6822 const int decode_for_pst_p
= (pst
!= NULL
);
6823 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
6825 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6827 line_ptr
= lh
->statement_program_start
;
6828 line_end
= lh
->statement_program_end
;
6830 /* Read the statement sequences until there's nothing left. */
6831 while (line_ptr
< line_end
)
6833 /* state machine registers */
6834 CORE_ADDR address
= 0;
6835 unsigned int file
= 1;
6836 unsigned int line
= 1;
6837 unsigned int column
= 0;
6838 int is_stmt
= lh
->default_is_stmt
;
6839 int basic_block
= 0;
6840 int end_sequence
= 0;
6842 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
6844 /* Start a subfile for the current file of the state machine. */
6845 /* lh->include_dirs and lh->file_names are 0-based, but the
6846 directory and file name numbers in the statement program
6848 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
6852 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6854 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6857 /* Decode the table. */
6858 while (!end_sequence
)
6860 op_code
= read_1_byte (abfd
, line_ptr
);
6863 if (op_code
>= lh
->opcode_base
)
6865 /* Special operand. */
6866 adj_opcode
= op_code
- lh
->opcode_base
;
6867 address
+= (adj_opcode
/ lh
->line_range
)
6868 * lh
->minimum_instruction_length
;
6869 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
6870 if (lh
->num_file_names
< file
)
6871 dwarf2_debug_line_missing_file_complaint ();
6874 lh
->file_names
[file
- 1].included_p
= 1;
6875 if (!decode_for_pst_p
)
6877 if (last_subfile
!= current_subfile
)
6880 record_line (last_subfile
, 0, address
);
6881 last_subfile
= current_subfile
;
6883 /* Append row to matrix using current values. */
6884 record_line (current_subfile
, line
,
6885 check_cu_functions (address
, cu
));
6890 else switch (op_code
)
6892 case DW_LNS_extended_op
:
6893 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6894 line_ptr
+= bytes_read
;
6895 extended_end
= line_ptr
+ extended_len
;
6896 extended_op
= read_1_byte (abfd
, line_ptr
);
6898 switch (extended_op
)
6900 case DW_LNE_end_sequence
:
6903 if (lh
->num_file_names
< file
)
6904 dwarf2_debug_line_missing_file_complaint ();
6907 lh
->file_names
[file
- 1].included_p
= 1;
6908 if (!decode_for_pst_p
)
6909 record_line (current_subfile
, 0, address
);
6912 case DW_LNE_set_address
:
6913 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
6914 line_ptr
+= bytes_read
;
6915 address
+= baseaddr
;
6917 case DW_LNE_define_file
:
6920 unsigned int dir_index
, mod_time
, length
;
6922 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
6923 line_ptr
+= bytes_read
;
6925 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6926 line_ptr
+= bytes_read
;
6928 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6929 line_ptr
+= bytes_read
;
6931 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6932 line_ptr
+= bytes_read
;
6933 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6937 complaint (&symfile_complaints
,
6938 _("mangled .debug_line section"));
6941 /* Make sure that we parsed the extended op correctly. If e.g.
6942 we expected a different address size than the producer used,
6943 we may have read the wrong number of bytes. */
6944 if (line_ptr
!= extended_end
)
6946 complaint (&symfile_complaints
,
6947 _("mangled .debug_line section"));
6952 if (lh
->num_file_names
< file
)
6953 dwarf2_debug_line_missing_file_complaint ();
6956 lh
->file_names
[file
- 1].included_p
= 1;
6957 if (!decode_for_pst_p
)
6959 if (last_subfile
!= current_subfile
)
6962 record_line (last_subfile
, 0, address
);
6963 last_subfile
= current_subfile
;
6965 record_line (current_subfile
, line
,
6966 check_cu_functions (address
, cu
));
6971 case DW_LNS_advance_pc
:
6972 address
+= lh
->minimum_instruction_length
6973 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6974 line_ptr
+= bytes_read
;
6976 case DW_LNS_advance_line
:
6977 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
6978 line_ptr
+= bytes_read
;
6980 case DW_LNS_set_file
:
6982 /* The arrays lh->include_dirs and lh->file_names are
6983 0-based, but the directory and file name numbers in
6984 the statement program are 1-based. */
6985 struct file_entry
*fe
;
6988 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6989 line_ptr
+= bytes_read
;
6990 if (lh
->num_file_names
< file
)
6991 dwarf2_debug_line_missing_file_complaint ();
6994 fe
= &lh
->file_names
[file
- 1];
6996 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6997 if (!decode_for_pst_p
)
6999 last_subfile
= current_subfile
;
7000 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7005 case DW_LNS_set_column
:
7006 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7007 line_ptr
+= bytes_read
;
7009 case DW_LNS_negate_stmt
:
7010 is_stmt
= (!is_stmt
);
7012 case DW_LNS_set_basic_block
:
7015 /* Add to the address register of the state machine the
7016 address increment value corresponding to special opcode
7017 255. I.e., this value is scaled by the minimum
7018 instruction length since special opcode 255 would have
7019 scaled the the increment. */
7020 case DW_LNS_const_add_pc
:
7021 address
+= (lh
->minimum_instruction_length
7022 * ((255 - lh
->opcode_base
) / lh
->line_range
));
7024 case DW_LNS_fixed_advance_pc
:
7025 address
+= read_2_bytes (abfd
, line_ptr
);
7030 /* Unknown standard opcode, ignore it. */
7033 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
7035 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7036 line_ptr
+= bytes_read
;
7043 if (decode_for_pst_p
)
7047 /* Now that we're done scanning the Line Header Program, we can
7048 create the psymtab of each included file. */
7049 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
7050 if (lh
->file_names
[file_index
].included_p
== 1)
7052 const struct file_entry fe
= lh
->file_names
[file_index
];
7053 char *include_name
= fe
.name
;
7054 char *dir_name
= NULL
;
7055 char *pst_filename
= pst
->filename
;
7058 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
7060 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
7062 include_name
= concat (dir_name
, SLASH_STRING
,
7063 include_name
, (char *)NULL
);
7064 make_cleanup (xfree
, include_name
);
7067 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
7069 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
7070 pst_filename
, (char *)NULL
);
7071 make_cleanup (xfree
, pst_filename
);
7074 if (strcmp (include_name
, pst_filename
) != 0)
7075 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
7080 /* Make sure a symtab is created for every file, even files
7081 which contain only variables (i.e. no code with associated
7085 struct file_entry
*fe
;
7087 for (i
= 0; i
< lh
->num_file_names
; i
++)
7090 fe
= &lh
->file_names
[i
];
7092 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7093 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7095 /* Skip the main file; we don't need it, and it must be
7096 allocated last, so that it will show up before the
7097 non-primary symtabs in the objfile's symtab list. */
7098 if (current_subfile
== first_subfile
)
7101 if (current_subfile
->symtab
== NULL
)
7102 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
7104 fe
->symtab
= current_subfile
->symtab
;
7109 /* Start a subfile for DWARF. FILENAME is the name of the file and
7110 DIRNAME the name of the source directory which contains FILENAME
7111 or NULL if not known. COMP_DIR is the compilation directory for the
7112 linetable's compilation unit or NULL if not known.
7113 This routine tries to keep line numbers from identical absolute and
7114 relative file names in a common subfile.
7116 Using the `list' example from the GDB testsuite, which resides in
7117 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
7118 of /srcdir/list0.c yields the following debugging information for list0.c:
7120 DW_AT_name: /srcdir/list0.c
7121 DW_AT_comp_dir: /compdir
7122 files.files[0].name: list0.h
7123 files.files[0].dir: /srcdir
7124 files.files[1].name: list0.c
7125 files.files[1].dir: /srcdir
7127 The line number information for list0.c has to end up in a single
7128 subfile, so that `break /srcdir/list0.c:1' works as expected.
7129 start_subfile will ensure that this happens provided that we pass the
7130 concatenation of files.files[1].dir and files.files[1].name as the
7134 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
7138 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
7139 `start_symtab' will always pass the contents of DW_AT_comp_dir as
7140 second argument to start_subfile. To be consistent, we do the
7141 same here. In order not to lose the line information directory,
7142 we concatenate it to the filename when it makes sense.
7143 Note that the Dwarf3 standard says (speaking of filenames in line
7144 information): ``The directory index is ignored for file names
7145 that represent full path names''. Thus ignoring dirname in the
7146 `else' branch below isn't an issue. */
7148 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
7149 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
7151 fullname
= filename
;
7153 start_subfile (fullname
, comp_dir
);
7155 if (fullname
!= filename
)
7160 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
7161 struct dwarf2_cu
*cu
)
7163 struct objfile
*objfile
= cu
->objfile
;
7164 struct comp_unit_head
*cu_header
= &cu
->header
;
7166 /* NOTE drow/2003-01-30: There used to be a comment and some special
7167 code here to turn a symbol with DW_AT_external and a
7168 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
7169 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
7170 with some versions of binutils) where shared libraries could have
7171 relocations against symbols in their debug information - the
7172 minimal symbol would have the right address, but the debug info
7173 would not. It's no longer necessary, because we will explicitly
7174 apply relocations when we read in the debug information now. */
7176 /* A DW_AT_location attribute with no contents indicates that a
7177 variable has been optimized away. */
7178 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
7180 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7184 /* Handle one degenerate form of location expression specially, to
7185 preserve GDB's previous behavior when section offsets are
7186 specified. If this is just a DW_OP_addr then mark this symbol
7189 if (attr_form_is_block (attr
)
7190 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
7191 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
7195 SYMBOL_VALUE_ADDRESS (sym
) =
7196 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
7197 fixup_symbol_section (sym
, objfile
);
7198 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
7199 SYMBOL_SECTION (sym
));
7200 SYMBOL_CLASS (sym
) = LOC_STATIC
;
7204 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
7205 expression evaluator, and use LOC_COMPUTED only when necessary
7206 (i.e. when the value of a register or memory location is
7207 referenced, or a thread-local block, etc.). Then again, it might
7208 not be worthwhile. I'm assuming that it isn't unless performance
7209 or memory numbers show me otherwise. */
7211 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
7212 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
7215 /* Given a pointer to a DWARF information entry, figure out if we need
7216 to make a symbol table entry for it, and if so, create a new entry
7217 and return a pointer to it.
7218 If TYPE is NULL, determine symbol type from the die, otherwise
7219 used the passed type. */
7221 static struct symbol
*
7222 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
7224 struct objfile
*objfile
= cu
->objfile
;
7225 struct symbol
*sym
= NULL
;
7227 struct attribute
*attr
= NULL
;
7228 struct attribute
*attr2
= NULL
;
7231 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7233 if (die
->tag
!= DW_TAG_namespace
)
7234 name
= dwarf2_linkage_name (die
, cu
);
7236 name
= TYPE_NAME (type
);
7240 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
7241 sizeof (struct symbol
));
7242 OBJSTAT (objfile
, n_syms
++);
7243 memset (sym
, 0, sizeof (struct symbol
));
7245 /* Cache this symbol's name and the name's demangled form (if any). */
7246 SYMBOL_LANGUAGE (sym
) = cu
->language
;
7247 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
7249 /* Default assumptions.
7250 Use the passed type or decode it from the die. */
7251 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7252 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7254 SYMBOL_TYPE (sym
) = type
;
7256 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
7257 attr
= dwarf2_attr (die
, DW_AT_decl_line
, cu
);
7260 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
7263 attr
= dwarf2_attr (die
, DW_AT_decl_file
, cu
);
7266 int file_index
= DW_UNSND (attr
);
7267 if (cu
->line_header
== NULL
7268 || file_index
> cu
->line_header
->num_file_names
)
7269 complaint (&symfile_complaints
,
7270 _("file index out of range"));
7271 else if (file_index
> 0)
7273 struct file_entry
*fe
;
7274 fe
= &cu
->line_header
->file_names
[file_index
- 1];
7275 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
7282 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
7285 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
7287 SYMBOL_CLASS (sym
) = LOC_LABEL
;
7289 case DW_TAG_subprogram
:
7290 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
7292 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
7293 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7294 if (attr2
&& (DW_UNSND (attr2
) != 0))
7296 add_symbol_to_list (sym
, &global_symbols
);
7300 add_symbol_to_list (sym
, cu
->list_in_scope
);
7303 case DW_TAG_variable
:
7304 /* Compilation with minimal debug info may result in variables
7305 with missing type entries. Change the misleading `void' type
7306 to something sensible. */
7307 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
7309 = builtin_type (current_gdbarch
)->nodebug_data_symbol
;
7311 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7314 dwarf2_const_value (attr
, sym
, cu
);
7315 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7316 if (attr2
&& (DW_UNSND (attr2
) != 0))
7317 add_symbol_to_list (sym
, &global_symbols
);
7319 add_symbol_to_list (sym
, cu
->list_in_scope
);
7322 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7325 var_decode_location (attr
, sym
, cu
);
7326 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7327 if (attr2
&& (DW_UNSND (attr2
) != 0))
7328 add_symbol_to_list (sym
, &global_symbols
);
7330 add_symbol_to_list (sym
, cu
->list_in_scope
);
7334 /* We do not know the address of this symbol.
7335 If it is an external symbol and we have type information
7336 for it, enter the symbol as a LOC_UNRESOLVED symbol.
7337 The address of the variable will then be determined from
7338 the minimal symbol table whenever the variable is
7340 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7341 if (attr2
&& (DW_UNSND (attr2
) != 0)
7342 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
7344 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
7345 add_symbol_to_list (sym
, &global_symbols
);
7349 case DW_TAG_formal_parameter
:
7350 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7353 var_decode_location (attr
, sym
, cu
);
7354 /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
7355 if (SYMBOL_CLASS (sym
) == LOC_COMPUTED
)
7356 SYMBOL_CLASS (sym
) = LOC_COMPUTED_ARG
;
7358 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7361 dwarf2_const_value (attr
, sym
, cu
);
7363 add_symbol_to_list (sym
, cu
->list_in_scope
);
7365 case DW_TAG_unspecified_parameters
:
7366 /* From varargs functions; gdb doesn't seem to have any
7367 interest in this information, so just ignore it for now.
7370 case DW_TAG_class_type
:
7371 case DW_TAG_interface_type
:
7372 case DW_TAG_structure_type
:
7373 case DW_TAG_union_type
:
7374 case DW_TAG_set_type
:
7375 case DW_TAG_enumeration_type
:
7376 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7377 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7379 /* Make sure that the symbol includes appropriate enclosing
7380 classes/namespaces in its name. These are calculated in
7381 read_structure_type, and the correct name is saved in
7384 if (cu
->language
== language_cplus
7385 || cu
->language
== language_java
)
7387 struct type
*type
= SYMBOL_TYPE (sym
);
7389 if (TYPE_TAG_NAME (type
) != NULL
)
7391 /* FIXME: carlton/2003-11-10: Should this use
7392 SYMBOL_SET_NAMES instead? (The same problem also
7393 arises further down in this function.) */
7394 /* The type's name is already allocated along with
7395 this objfile, so we don't need to duplicate it
7397 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
7402 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
7403 really ever be static objects: otherwise, if you try
7404 to, say, break of a class's method and you're in a file
7405 which doesn't mention that class, it won't work unless
7406 the check for all static symbols in lookup_symbol_aux
7407 saves you. See the OtherFileClass tests in
7408 gdb.c++/namespace.exp. */
7410 struct pending
**list_to_add
;
7412 list_to_add
= (cu
->list_in_scope
== &file_symbols
7413 && (cu
->language
== language_cplus
7414 || cu
->language
== language_java
)
7415 ? &global_symbols
: cu
->list_in_scope
);
7417 add_symbol_to_list (sym
, list_to_add
);
7419 /* The semantics of C++ state that "struct foo { ... }" also
7420 defines a typedef for "foo". A Java class declaration also
7421 defines a typedef for the class. Synthesize a typedef symbol
7422 so that "ptype foo" works as expected. */
7423 if (cu
->language
== language_cplus
7424 || cu
->language
== language_java
7425 || cu
->language
== language_ada
)
7427 struct symbol
*typedef_sym
= (struct symbol
*)
7428 obstack_alloc (&objfile
->objfile_obstack
,
7429 sizeof (struct symbol
));
7430 *typedef_sym
= *sym
;
7431 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
7432 /* The symbol's name is already allocated along with
7433 this objfile, so we don't need to duplicate it for
7435 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
7436 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
7437 add_symbol_to_list (typedef_sym
, list_to_add
);
7441 case DW_TAG_typedef
:
7442 if (processing_has_namespace_info
7443 && processing_current_prefix
[0] != '\0')
7445 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7446 processing_current_prefix
,
7449 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7450 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7451 add_symbol_to_list (sym
, cu
->list_in_scope
);
7453 case DW_TAG_base_type
:
7454 case DW_TAG_subrange_type
:
7455 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7456 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7457 add_symbol_to_list (sym
, cu
->list_in_scope
);
7459 case DW_TAG_enumerator
:
7460 if (processing_has_namespace_info
7461 && processing_current_prefix
[0] != '\0')
7463 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7464 processing_current_prefix
,
7467 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7470 dwarf2_const_value (attr
, sym
, cu
);
7473 /* NOTE: carlton/2003-11-10: See comment above in the
7474 DW_TAG_class_type, etc. block. */
7476 struct pending
**list_to_add
;
7478 list_to_add
= (cu
->list_in_scope
== &file_symbols
7479 && (cu
->language
== language_cplus
7480 || cu
->language
== language_java
)
7481 ? &global_symbols
: cu
->list_in_scope
);
7483 add_symbol_to_list (sym
, list_to_add
);
7486 case DW_TAG_namespace
:
7487 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7488 add_symbol_to_list (sym
, &global_symbols
);
7491 /* Not a tag we recognize. Hopefully we aren't processing
7492 trash data, but since we must specifically ignore things
7493 we don't recognize, there is nothing else we should do at
7495 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
7496 dwarf_tag_name (die
->tag
));
7503 /* Copy constant value from an attribute to a symbol. */
7506 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
7507 struct dwarf2_cu
*cu
)
7509 struct objfile
*objfile
= cu
->objfile
;
7510 struct comp_unit_head
*cu_header
= &cu
->header
;
7511 struct dwarf_block
*blk
;
7516 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
7517 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7518 cu_header
->addr_size
,
7519 TYPE_LENGTH (SYMBOL_TYPE
7521 SYMBOL_VALUE_BYTES (sym
) =
7522 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
7523 /* NOTE: cagney/2003-05-09: In-lined store_address call with
7524 it's body - store_unsigned_integer. */
7525 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
7527 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7529 case DW_FORM_block1
:
7530 case DW_FORM_block2
:
7531 case DW_FORM_block4
:
7533 blk
= DW_BLOCK (attr
);
7534 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
7535 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7537 TYPE_LENGTH (SYMBOL_TYPE
7539 SYMBOL_VALUE_BYTES (sym
) =
7540 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
7541 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
7542 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7545 /* The DW_AT_const_value attributes are supposed to carry the
7546 symbol's value "represented as it would be on the target
7547 architecture." By the time we get here, it's already been
7548 converted to host endianness, so we just need to sign- or
7549 zero-extend it as appropriate. */
7551 dwarf2_const_value_data (attr
, sym
, 8);
7554 dwarf2_const_value_data (attr
, sym
, 16);
7557 dwarf2_const_value_data (attr
, sym
, 32);
7560 dwarf2_const_value_data (attr
, sym
, 64);
7564 SYMBOL_VALUE (sym
) = DW_SND (attr
);
7565 SYMBOL_CLASS (sym
) = LOC_CONST
;
7569 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
7570 SYMBOL_CLASS (sym
) = LOC_CONST
;
7574 complaint (&symfile_complaints
,
7575 _("unsupported const value attribute form: '%s'"),
7576 dwarf_form_name (attr
->form
));
7577 SYMBOL_VALUE (sym
) = 0;
7578 SYMBOL_CLASS (sym
) = LOC_CONST
;
7584 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
7585 or zero-extend it as appropriate for the symbol's type. */
7587 dwarf2_const_value_data (struct attribute
*attr
,
7591 LONGEST l
= DW_UNSND (attr
);
7593 if (bits
< sizeof (l
) * 8)
7595 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
7596 l
&= ((LONGEST
) 1 << bits
) - 1;
7598 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
7601 SYMBOL_VALUE (sym
) = l
;
7602 SYMBOL_CLASS (sym
) = LOC_CONST
;
7606 /* Return the type of the die in question using its DW_AT_type attribute. */
7608 static struct type
*
7609 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7612 struct attribute
*type_attr
;
7613 struct die_info
*type_die
;
7615 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
7618 /* A missing DW_AT_type represents a void type. */
7619 return builtin_type (current_gdbarch
)->builtin_void
;
7622 type_die
= follow_die_ref (die
, type_attr
, cu
);
7624 type
= tag_type_to_type (type_die
, cu
);
7627 dump_die (type_die
);
7628 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
7634 /* Return the containing type of the die in question using its
7635 DW_AT_containing_type attribute. */
7637 static struct type
*
7638 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7640 struct type
*type
= NULL
;
7641 struct attribute
*type_attr
;
7642 struct die_info
*type_die
= NULL
;
7644 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
7647 type_die
= follow_die_ref (die
, type_attr
, cu
);
7648 type
= tag_type_to_type (type_die
, cu
);
7653 dump_die (type_die
);
7654 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
7660 static struct type
*
7661 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7669 read_type_die (die
, cu
);
7673 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
7681 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7683 char *prefix
= determine_prefix (die
, cu
);
7684 const char *old_prefix
= processing_current_prefix
;
7685 struct cleanup
*back_to
= make_cleanup (xfree
, prefix
);
7686 processing_current_prefix
= prefix
;
7690 case DW_TAG_class_type
:
7691 case DW_TAG_interface_type
:
7692 case DW_TAG_structure_type
:
7693 case DW_TAG_union_type
:
7694 read_structure_type (die
, cu
);
7696 case DW_TAG_enumeration_type
:
7697 read_enumeration_type (die
, cu
);
7699 case DW_TAG_subprogram
:
7700 case DW_TAG_subroutine_type
:
7701 read_subroutine_type (die
, cu
);
7703 case DW_TAG_array_type
:
7704 read_array_type (die
, cu
);
7706 case DW_TAG_set_type
:
7707 read_set_type (die
, cu
);
7709 case DW_TAG_pointer_type
:
7710 read_tag_pointer_type (die
, cu
);
7712 case DW_TAG_ptr_to_member_type
:
7713 read_tag_ptr_to_member_type (die
, cu
);
7715 case DW_TAG_reference_type
:
7716 read_tag_reference_type (die
, cu
);
7718 case DW_TAG_const_type
:
7719 read_tag_const_type (die
, cu
);
7721 case DW_TAG_volatile_type
:
7722 read_tag_volatile_type (die
, cu
);
7724 case DW_TAG_string_type
:
7725 read_tag_string_type (die
, cu
);
7727 case DW_TAG_typedef
:
7728 read_typedef (die
, cu
);
7730 case DW_TAG_subrange_type
:
7731 read_subrange_type (die
, cu
);
7733 case DW_TAG_base_type
:
7734 read_base_type (die
, cu
);
7736 case DW_TAG_unspecified_type
:
7737 read_unspecified_type (die
, cu
);
7740 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
7741 dwarf_tag_name (die
->tag
));
7745 processing_current_prefix
= old_prefix
;
7746 do_cleanups (back_to
);
7749 /* Return the name of the namespace/class that DIE is defined within,
7750 or "" if we can't tell. The caller should xfree the result. */
7752 /* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
7753 therein) for an example of how to use this function to deal with
7754 DW_AT_specification. */
7757 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
7759 struct die_info
*parent
;
7761 if (cu
->language
!= language_cplus
7762 && cu
->language
!= language_java
)
7765 parent
= die
->parent
;
7769 return xstrdup ("");
7773 switch (parent
->tag
) {
7774 case DW_TAG_namespace
:
7776 /* FIXME: carlton/2004-03-05: Should I follow extension dies
7777 before doing this check? */
7778 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7780 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7785 char *parent_prefix
= determine_prefix (parent
, cu
);
7786 char *retval
= typename_concat (NULL
, parent_prefix
,
7787 namespace_name (parent
, &dummy
,
7790 xfree (parent_prefix
);
7795 case DW_TAG_class_type
:
7796 case DW_TAG_interface_type
:
7797 case DW_TAG_structure_type
:
7799 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7801 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7805 const char *old_prefix
= processing_current_prefix
;
7806 char *new_prefix
= determine_prefix (parent
, cu
);
7809 processing_current_prefix
= new_prefix
;
7810 retval
= determine_class_name (parent
, cu
);
7811 processing_current_prefix
= old_prefix
;
7818 return determine_prefix (parent
, cu
);
7823 /* Return a newly-allocated string formed by concatenating PREFIX and
7824 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
7825 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
7826 perform an obconcat, otherwise allocate storage for the result. The CU argument
7827 is used to determine the language and hence, the appropriate separator. */
7829 #define MAX_SEP_LEN 2 /* sizeof ("::") */
7832 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
7833 struct dwarf2_cu
*cu
)
7837 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
7839 else if (cu
->language
== language_java
)
7846 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
7851 strcpy (retval
, prefix
);
7852 strcat (retval
, sep
);
7855 strcat (retval
, suffix
);
7861 /* We have an obstack. */
7862 return obconcat (obs
, prefix
, sep
, suffix
);
7868 copy_die (struct die_info
*old_die
)
7870 struct die_info
*new_die
;
7873 new_die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
7874 memset (new_die
, 0, sizeof (struct die_info
));
7876 new_die
->tag
= old_die
->tag
;
7877 new_die
->has_children
= old_die
->has_children
;
7878 new_die
->abbrev
= old_die
->abbrev
;
7879 new_die
->offset
= old_die
->offset
;
7880 new_die
->type
= NULL
;
7882 num_attrs
= old_die
->num_attrs
;
7883 new_die
->num_attrs
= num_attrs
;
7884 new_die
->attrs
= (struct attribute
*)
7885 xmalloc (num_attrs
* sizeof (struct attribute
));
7887 for (i
= 0; i
< old_die
->num_attrs
; ++i
)
7889 new_die
->attrs
[i
].name
= old_die
->attrs
[i
].name
;
7890 new_die
->attrs
[i
].form
= old_die
->attrs
[i
].form
;
7891 new_die
->attrs
[i
].u
.addr
= old_die
->attrs
[i
].u
.addr
;
7894 new_die
->next
= NULL
;
7899 /* Return sibling of die, NULL if no sibling. */
7901 static struct die_info
*
7902 sibling_die (struct die_info
*die
)
7904 return die
->sibling
;
7907 /* Get linkage name of a die, return NULL if not found. */
7910 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
7912 struct attribute
*attr
;
7914 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7915 if (attr
&& DW_STRING (attr
))
7916 return DW_STRING (attr
);
7917 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7918 if (attr
&& DW_STRING (attr
))
7919 return DW_STRING (attr
);
7923 /* Get name of a die, return NULL if not found. */
7926 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
7928 struct attribute
*attr
;
7930 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7931 if (attr
&& DW_STRING (attr
))
7932 return DW_STRING (attr
);
7936 /* Return the die that this die in an extension of, or NULL if there
7939 static struct die_info
*
7940 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
*cu
)
7942 struct attribute
*attr
;
7944 attr
= dwarf2_attr (die
, DW_AT_extension
, cu
);
7948 return follow_die_ref (die
, attr
, cu
);
7951 /* Convert a DIE tag into its string name. */
7954 dwarf_tag_name (unsigned tag
)
7958 case DW_TAG_padding
:
7959 return "DW_TAG_padding";
7960 case DW_TAG_array_type
:
7961 return "DW_TAG_array_type";
7962 case DW_TAG_class_type
:
7963 return "DW_TAG_class_type";
7964 case DW_TAG_entry_point
:
7965 return "DW_TAG_entry_point";
7966 case DW_TAG_enumeration_type
:
7967 return "DW_TAG_enumeration_type";
7968 case DW_TAG_formal_parameter
:
7969 return "DW_TAG_formal_parameter";
7970 case DW_TAG_imported_declaration
:
7971 return "DW_TAG_imported_declaration";
7973 return "DW_TAG_label";
7974 case DW_TAG_lexical_block
:
7975 return "DW_TAG_lexical_block";
7977 return "DW_TAG_member";
7978 case DW_TAG_pointer_type
:
7979 return "DW_TAG_pointer_type";
7980 case DW_TAG_reference_type
:
7981 return "DW_TAG_reference_type";
7982 case DW_TAG_compile_unit
:
7983 return "DW_TAG_compile_unit";
7984 case DW_TAG_string_type
:
7985 return "DW_TAG_string_type";
7986 case DW_TAG_structure_type
:
7987 return "DW_TAG_structure_type";
7988 case DW_TAG_subroutine_type
:
7989 return "DW_TAG_subroutine_type";
7990 case DW_TAG_typedef
:
7991 return "DW_TAG_typedef";
7992 case DW_TAG_union_type
:
7993 return "DW_TAG_union_type";
7994 case DW_TAG_unspecified_parameters
:
7995 return "DW_TAG_unspecified_parameters";
7996 case DW_TAG_variant
:
7997 return "DW_TAG_variant";
7998 case DW_TAG_common_block
:
7999 return "DW_TAG_common_block";
8000 case DW_TAG_common_inclusion
:
8001 return "DW_TAG_common_inclusion";
8002 case DW_TAG_inheritance
:
8003 return "DW_TAG_inheritance";
8004 case DW_TAG_inlined_subroutine
:
8005 return "DW_TAG_inlined_subroutine";
8007 return "DW_TAG_module";
8008 case DW_TAG_ptr_to_member_type
:
8009 return "DW_TAG_ptr_to_member_type";
8010 case DW_TAG_set_type
:
8011 return "DW_TAG_set_type";
8012 case DW_TAG_subrange_type
:
8013 return "DW_TAG_subrange_type";
8014 case DW_TAG_with_stmt
:
8015 return "DW_TAG_with_stmt";
8016 case DW_TAG_access_declaration
:
8017 return "DW_TAG_access_declaration";
8018 case DW_TAG_base_type
:
8019 return "DW_TAG_base_type";
8020 case DW_TAG_catch_block
:
8021 return "DW_TAG_catch_block";
8022 case DW_TAG_const_type
:
8023 return "DW_TAG_const_type";
8024 case DW_TAG_constant
:
8025 return "DW_TAG_constant";
8026 case DW_TAG_enumerator
:
8027 return "DW_TAG_enumerator";
8028 case DW_TAG_file_type
:
8029 return "DW_TAG_file_type";
8031 return "DW_TAG_friend";
8032 case DW_TAG_namelist
:
8033 return "DW_TAG_namelist";
8034 case DW_TAG_namelist_item
:
8035 return "DW_TAG_namelist_item";
8036 case DW_TAG_packed_type
:
8037 return "DW_TAG_packed_type";
8038 case DW_TAG_subprogram
:
8039 return "DW_TAG_subprogram";
8040 case DW_TAG_template_type_param
:
8041 return "DW_TAG_template_type_param";
8042 case DW_TAG_template_value_param
:
8043 return "DW_TAG_template_value_param";
8044 case DW_TAG_thrown_type
:
8045 return "DW_TAG_thrown_type";
8046 case DW_TAG_try_block
:
8047 return "DW_TAG_try_block";
8048 case DW_TAG_variant_part
:
8049 return "DW_TAG_variant_part";
8050 case DW_TAG_variable
:
8051 return "DW_TAG_variable";
8052 case DW_TAG_volatile_type
:
8053 return "DW_TAG_volatile_type";
8054 case DW_TAG_dwarf_procedure
:
8055 return "DW_TAG_dwarf_procedure";
8056 case DW_TAG_restrict_type
:
8057 return "DW_TAG_restrict_type";
8058 case DW_TAG_interface_type
:
8059 return "DW_TAG_interface_type";
8060 case DW_TAG_namespace
:
8061 return "DW_TAG_namespace";
8062 case DW_TAG_imported_module
:
8063 return "DW_TAG_imported_module";
8064 case DW_TAG_unspecified_type
:
8065 return "DW_TAG_unspecified_type";
8066 case DW_TAG_partial_unit
:
8067 return "DW_TAG_partial_unit";
8068 case DW_TAG_imported_unit
:
8069 return "DW_TAG_imported_unit";
8070 case DW_TAG_condition
:
8071 return "DW_TAG_condition";
8072 case DW_TAG_shared_type
:
8073 return "DW_TAG_shared_type";
8074 case DW_TAG_MIPS_loop
:
8075 return "DW_TAG_MIPS_loop";
8076 case DW_TAG_HP_array_descriptor
:
8077 return "DW_TAG_HP_array_descriptor";
8078 case DW_TAG_format_label
:
8079 return "DW_TAG_format_label";
8080 case DW_TAG_function_template
:
8081 return "DW_TAG_function_template";
8082 case DW_TAG_class_template
:
8083 return "DW_TAG_class_template";
8084 case DW_TAG_GNU_BINCL
:
8085 return "DW_TAG_GNU_BINCL";
8086 case DW_TAG_GNU_EINCL
:
8087 return "DW_TAG_GNU_EINCL";
8088 case DW_TAG_upc_shared_type
:
8089 return "DW_TAG_upc_shared_type";
8090 case DW_TAG_upc_strict_type
:
8091 return "DW_TAG_upc_strict_type";
8092 case DW_TAG_upc_relaxed_type
:
8093 return "DW_TAG_upc_relaxed_type";
8094 case DW_TAG_PGI_kanji_type
:
8095 return "DW_TAG_PGI_kanji_type";
8096 case DW_TAG_PGI_interface_block
:
8097 return "DW_TAG_PGI_interface_block";
8099 return "DW_TAG_<unknown>";
8103 /* Convert a DWARF attribute code into its string name. */
8106 dwarf_attr_name (unsigned attr
)
8111 return "DW_AT_sibling";
8112 case DW_AT_location
:
8113 return "DW_AT_location";
8115 return "DW_AT_name";
8116 case DW_AT_ordering
:
8117 return "DW_AT_ordering";
8118 case DW_AT_subscr_data
:
8119 return "DW_AT_subscr_data";
8120 case DW_AT_byte_size
:
8121 return "DW_AT_byte_size";
8122 case DW_AT_bit_offset
:
8123 return "DW_AT_bit_offset";
8124 case DW_AT_bit_size
:
8125 return "DW_AT_bit_size";
8126 case DW_AT_element_list
:
8127 return "DW_AT_element_list";
8128 case DW_AT_stmt_list
:
8129 return "DW_AT_stmt_list";
8131 return "DW_AT_low_pc";
8133 return "DW_AT_high_pc";
8134 case DW_AT_language
:
8135 return "DW_AT_language";
8137 return "DW_AT_member";
8139 return "DW_AT_discr";
8140 case DW_AT_discr_value
:
8141 return "DW_AT_discr_value";
8142 case DW_AT_visibility
:
8143 return "DW_AT_visibility";
8145 return "DW_AT_import";
8146 case DW_AT_string_length
:
8147 return "DW_AT_string_length";
8148 case DW_AT_common_reference
:
8149 return "DW_AT_common_reference";
8150 case DW_AT_comp_dir
:
8151 return "DW_AT_comp_dir";
8152 case DW_AT_const_value
:
8153 return "DW_AT_const_value";
8154 case DW_AT_containing_type
:
8155 return "DW_AT_containing_type";
8156 case DW_AT_default_value
:
8157 return "DW_AT_default_value";
8159 return "DW_AT_inline";
8160 case DW_AT_is_optional
:
8161 return "DW_AT_is_optional";
8162 case DW_AT_lower_bound
:
8163 return "DW_AT_lower_bound";
8164 case DW_AT_producer
:
8165 return "DW_AT_producer";
8166 case DW_AT_prototyped
:
8167 return "DW_AT_prototyped";
8168 case DW_AT_return_addr
:
8169 return "DW_AT_return_addr";
8170 case DW_AT_start_scope
:
8171 return "DW_AT_start_scope";
8172 case DW_AT_bit_stride
:
8173 return "DW_AT_bit_stride";
8174 case DW_AT_upper_bound
:
8175 return "DW_AT_upper_bound";
8176 case DW_AT_abstract_origin
:
8177 return "DW_AT_abstract_origin";
8178 case DW_AT_accessibility
:
8179 return "DW_AT_accessibility";
8180 case DW_AT_address_class
:
8181 return "DW_AT_address_class";
8182 case DW_AT_artificial
:
8183 return "DW_AT_artificial";
8184 case DW_AT_base_types
:
8185 return "DW_AT_base_types";
8186 case DW_AT_calling_convention
:
8187 return "DW_AT_calling_convention";
8189 return "DW_AT_count";
8190 case DW_AT_data_member_location
:
8191 return "DW_AT_data_member_location";
8192 case DW_AT_decl_column
:
8193 return "DW_AT_decl_column";
8194 case DW_AT_decl_file
:
8195 return "DW_AT_decl_file";
8196 case DW_AT_decl_line
:
8197 return "DW_AT_decl_line";
8198 case DW_AT_declaration
:
8199 return "DW_AT_declaration";
8200 case DW_AT_discr_list
:
8201 return "DW_AT_discr_list";
8202 case DW_AT_encoding
:
8203 return "DW_AT_encoding";
8204 case DW_AT_external
:
8205 return "DW_AT_external";
8206 case DW_AT_frame_base
:
8207 return "DW_AT_frame_base";
8209 return "DW_AT_friend";
8210 case DW_AT_identifier_case
:
8211 return "DW_AT_identifier_case";
8212 case DW_AT_macro_info
:
8213 return "DW_AT_macro_info";
8214 case DW_AT_namelist_items
:
8215 return "DW_AT_namelist_items";
8216 case DW_AT_priority
:
8217 return "DW_AT_priority";
8219 return "DW_AT_segment";
8220 case DW_AT_specification
:
8221 return "DW_AT_specification";
8222 case DW_AT_static_link
:
8223 return "DW_AT_static_link";
8225 return "DW_AT_type";
8226 case DW_AT_use_location
:
8227 return "DW_AT_use_location";
8228 case DW_AT_variable_parameter
:
8229 return "DW_AT_variable_parameter";
8230 case DW_AT_virtuality
:
8231 return "DW_AT_virtuality";
8232 case DW_AT_vtable_elem_location
:
8233 return "DW_AT_vtable_elem_location";
8234 /* DWARF 3 values. */
8235 case DW_AT_allocated
:
8236 return "DW_AT_allocated";
8237 case DW_AT_associated
:
8238 return "DW_AT_associated";
8239 case DW_AT_data_location
:
8240 return "DW_AT_data_location";
8241 case DW_AT_byte_stride
:
8242 return "DW_AT_byte_stride";
8243 case DW_AT_entry_pc
:
8244 return "DW_AT_entry_pc";
8245 case DW_AT_use_UTF8
:
8246 return "DW_AT_use_UTF8";
8247 case DW_AT_extension
:
8248 return "DW_AT_extension";
8250 return "DW_AT_ranges";
8251 case DW_AT_trampoline
:
8252 return "DW_AT_trampoline";
8253 case DW_AT_call_column
:
8254 return "DW_AT_call_column";
8255 case DW_AT_call_file
:
8256 return "DW_AT_call_file";
8257 case DW_AT_call_line
:
8258 return "DW_AT_call_line";
8259 case DW_AT_description
:
8260 return "DW_AT_description";
8261 case DW_AT_binary_scale
:
8262 return "DW_AT_binary_scale";
8263 case DW_AT_decimal_scale
:
8264 return "DW_AT_decimal_scale";
8266 return "DW_AT_small";
8267 case DW_AT_decimal_sign
:
8268 return "DW_AT_decimal_sign";
8269 case DW_AT_digit_count
:
8270 return "DW_AT_digit_count";
8271 case DW_AT_picture_string
:
8272 return "DW_AT_picture_string";
8274 return "DW_AT_mutable";
8275 case DW_AT_threads_scaled
:
8276 return "DW_AT_threads_scaled";
8277 case DW_AT_explicit
:
8278 return "DW_AT_explicit";
8279 case DW_AT_object_pointer
:
8280 return "DW_AT_object_pointer";
8281 case DW_AT_endianity
:
8282 return "DW_AT_endianity";
8283 case DW_AT_elemental
:
8284 return "DW_AT_elemental";
8286 return "DW_AT_pure";
8287 case DW_AT_recursive
:
8288 return "DW_AT_recursive";
8290 /* SGI/MIPS extensions. */
8291 case DW_AT_MIPS_fde
:
8292 return "DW_AT_MIPS_fde";
8293 case DW_AT_MIPS_loop_begin
:
8294 return "DW_AT_MIPS_loop_begin";
8295 case DW_AT_MIPS_tail_loop_begin
:
8296 return "DW_AT_MIPS_tail_loop_begin";
8297 case DW_AT_MIPS_epilog_begin
:
8298 return "DW_AT_MIPS_epilog_begin";
8299 case DW_AT_MIPS_loop_unroll_factor
:
8300 return "DW_AT_MIPS_loop_unroll_factor";
8301 case DW_AT_MIPS_software_pipeline_depth
:
8302 return "DW_AT_MIPS_software_pipeline_depth";
8303 case DW_AT_MIPS_linkage_name
:
8304 return "DW_AT_MIPS_linkage_name";
8305 case DW_AT_MIPS_stride
:
8306 return "DW_AT_MIPS_stride";
8307 case DW_AT_MIPS_abstract_name
:
8308 return "DW_AT_MIPS_abstract_name";
8309 case DW_AT_MIPS_clone_origin
:
8310 return "DW_AT_MIPS_clone_origin";
8311 case DW_AT_MIPS_has_inlines
:
8312 return "DW_AT_MIPS_has_inlines";
8314 /* HP extensions. */
8315 case DW_AT_HP_block_index
:
8316 return "DW_AT_HP_block_index";
8317 case DW_AT_HP_unmodifiable
:
8318 return "DW_AT_HP_unmodifiable";
8319 case DW_AT_HP_actuals_stmt_list
:
8320 return "DW_AT_HP_actuals_stmt_list";
8321 case DW_AT_HP_proc_per_section
:
8322 return "DW_AT_HP_proc_per_section";
8323 case DW_AT_HP_raw_data_ptr
:
8324 return "DW_AT_HP_raw_data_ptr";
8325 case DW_AT_HP_pass_by_reference
:
8326 return "DW_AT_HP_pass_by_reference";
8327 case DW_AT_HP_opt_level
:
8328 return "DW_AT_HP_opt_level";
8329 case DW_AT_HP_prof_version_id
:
8330 return "DW_AT_HP_prof_version_id";
8331 case DW_AT_HP_opt_flags
:
8332 return "DW_AT_HP_opt_flags";
8333 case DW_AT_HP_cold_region_low_pc
:
8334 return "DW_AT_HP_cold_region_low_pc";
8335 case DW_AT_HP_cold_region_high_pc
:
8336 return "DW_AT_HP_cold_region_high_pc";
8337 case DW_AT_HP_all_variables_modifiable
:
8338 return "DW_AT_HP_all_variables_modifiable";
8339 case DW_AT_HP_linkage_name
:
8340 return "DW_AT_HP_linkage_name";
8341 case DW_AT_HP_prof_flags
:
8342 return "DW_AT_HP_prof_flags";
8343 /* GNU extensions. */
8344 case DW_AT_sf_names
:
8345 return "DW_AT_sf_names";
8346 case DW_AT_src_info
:
8347 return "DW_AT_src_info";
8348 case DW_AT_mac_info
:
8349 return "DW_AT_mac_info";
8350 case DW_AT_src_coords
:
8351 return "DW_AT_src_coords";
8352 case DW_AT_body_begin
:
8353 return "DW_AT_body_begin";
8354 case DW_AT_body_end
:
8355 return "DW_AT_body_end";
8356 case DW_AT_GNU_vector
:
8357 return "DW_AT_GNU_vector";
8358 /* VMS extensions. */
8359 case DW_AT_VMS_rtnbeg_pd_address
:
8360 return "DW_AT_VMS_rtnbeg_pd_address";
8361 /* UPC extension. */
8362 case DW_AT_upc_threads_scaled
:
8363 return "DW_AT_upc_threads_scaled";
8364 /* PGI (STMicroelectronics) extensions. */
8365 case DW_AT_PGI_lbase
:
8366 return "DW_AT_PGI_lbase";
8367 case DW_AT_PGI_soffset
:
8368 return "DW_AT_PGI_soffset";
8369 case DW_AT_PGI_lstride
:
8370 return "DW_AT_PGI_lstride";
8372 return "DW_AT_<unknown>";
8376 /* Convert a DWARF value form code into its string name. */
8379 dwarf_form_name (unsigned form
)
8384 return "DW_FORM_addr";
8385 case DW_FORM_block2
:
8386 return "DW_FORM_block2";
8387 case DW_FORM_block4
:
8388 return "DW_FORM_block4";
8390 return "DW_FORM_data2";
8392 return "DW_FORM_data4";
8394 return "DW_FORM_data8";
8395 case DW_FORM_string
:
8396 return "DW_FORM_string";
8398 return "DW_FORM_block";
8399 case DW_FORM_block1
:
8400 return "DW_FORM_block1";
8402 return "DW_FORM_data1";
8404 return "DW_FORM_flag";
8406 return "DW_FORM_sdata";
8408 return "DW_FORM_strp";
8410 return "DW_FORM_udata";
8411 case DW_FORM_ref_addr
:
8412 return "DW_FORM_ref_addr";
8414 return "DW_FORM_ref1";
8416 return "DW_FORM_ref2";
8418 return "DW_FORM_ref4";
8420 return "DW_FORM_ref8";
8421 case DW_FORM_ref_udata
:
8422 return "DW_FORM_ref_udata";
8423 case DW_FORM_indirect
:
8424 return "DW_FORM_indirect";
8426 return "DW_FORM_<unknown>";
8430 /* Convert a DWARF stack opcode into its string name. */
8433 dwarf_stack_op_name (unsigned op
)
8438 return "DW_OP_addr";
8440 return "DW_OP_deref";
8442 return "DW_OP_const1u";
8444 return "DW_OP_const1s";
8446 return "DW_OP_const2u";
8448 return "DW_OP_const2s";
8450 return "DW_OP_const4u";
8452 return "DW_OP_const4s";
8454 return "DW_OP_const8u";
8456 return "DW_OP_const8s";
8458 return "DW_OP_constu";
8460 return "DW_OP_consts";
8464 return "DW_OP_drop";
8466 return "DW_OP_over";
8468 return "DW_OP_pick";
8470 return "DW_OP_swap";
8474 return "DW_OP_xderef";
8482 return "DW_OP_minus";
8494 return "DW_OP_plus";
8495 case DW_OP_plus_uconst
:
8496 return "DW_OP_plus_uconst";
8502 return "DW_OP_shra";
8520 return "DW_OP_skip";
8522 return "DW_OP_lit0";
8524 return "DW_OP_lit1";
8526 return "DW_OP_lit2";
8528 return "DW_OP_lit3";
8530 return "DW_OP_lit4";
8532 return "DW_OP_lit5";
8534 return "DW_OP_lit6";
8536 return "DW_OP_lit7";
8538 return "DW_OP_lit8";
8540 return "DW_OP_lit9";
8542 return "DW_OP_lit10";
8544 return "DW_OP_lit11";
8546 return "DW_OP_lit12";
8548 return "DW_OP_lit13";
8550 return "DW_OP_lit14";
8552 return "DW_OP_lit15";
8554 return "DW_OP_lit16";
8556 return "DW_OP_lit17";
8558 return "DW_OP_lit18";
8560 return "DW_OP_lit19";
8562 return "DW_OP_lit20";
8564 return "DW_OP_lit21";
8566 return "DW_OP_lit22";
8568 return "DW_OP_lit23";
8570 return "DW_OP_lit24";
8572 return "DW_OP_lit25";
8574 return "DW_OP_lit26";
8576 return "DW_OP_lit27";
8578 return "DW_OP_lit28";
8580 return "DW_OP_lit29";
8582 return "DW_OP_lit30";
8584 return "DW_OP_lit31";
8586 return "DW_OP_reg0";
8588 return "DW_OP_reg1";
8590 return "DW_OP_reg2";
8592 return "DW_OP_reg3";
8594 return "DW_OP_reg4";
8596 return "DW_OP_reg5";
8598 return "DW_OP_reg6";
8600 return "DW_OP_reg7";
8602 return "DW_OP_reg8";
8604 return "DW_OP_reg9";
8606 return "DW_OP_reg10";
8608 return "DW_OP_reg11";
8610 return "DW_OP_reg12";
8612 return "DW_OP_reg13";
8614 return "DW_OP_reg14";
8616 return "DW_OP_reg15";
8618 return "DW_OP_reg16";
8620 return "DW_OP_reg17";
8622 return "DW_OP_reg18";
8624 return "DW_OP_reg19";
8626 return "DW_OP_reg20";
8628 return "DW_OP_reg21";
8630 return "DW_OP_reg22";
8632 return "DW_OP_reg23";
8634 return "DW_OP_reg24";
8636 return "DW_OP_reg25";
8638 return "DW_OP_reg26";
8640 return "DW_OP_reg27";
8642 return "DW_OP_reg28";
8644 return "DW_OP_reg29";
8646 return "DW_OP_reg30";
8648 return "DW_OP_reg31";
8650 return "DW_OP_breg0";
8652 return "DW_OP_breg1";
8654 return "DW_OP_breg2";
8656 return "DW_OP_breg3";
8658 return "DW_OP_breg4";
8660 return "DW_OP_breg5";
8662 return "DW_OP_breg6";
8664 return "DW_OP_breg7";
8666 return "DW_OP_breg8";
8668 return "DW_OP_breg9";
8670 return "DW_OP_breg10";
8672 return "DW_OP_breg11";
8674 return "DW_OP_breg12";
8676 return "DW_OP_breg13";
8678 return "DW_OP_breg14";
8680 return "DW_OP_breg15";
8682 return "DW_OP_breg16";
8684 return "DW_OP_breg17";
8686 return "DW_OP_breg18";
8688 return "DW_OP_breg19";
8690 return "DW_OP_breg20";
8692 return "DW_OP_breg21";
8694 return "DW_OP_breg22";
8696 return "DW_OP_breg23";
8698 return "DW_OP_breg24";
8700 return "DW_OP_breg25";
8702 return "DW_OP_breg26";
8704 return "DW_OP_breg27";
8706 return "DW_OP_breg28";
8708 return "DW_OP_breg29";
8710 return "DW_OP_breg30";
8712 return "DW_OP_breg31";
8714 return "DW_OP_regx";
8716 return "DW_OP_fbreg";
8718 return "DW_OP_bregx";
8720 return "DW_OP_piece";
8721 case DW_OP_deref_size
:
8722 return "DW_OP_deref_size";
8723 case DW_OP_xderef_size
:
8724 return "DW_OP_xderef_size";
8727 /* DWARF 3 extensions. */
8728 case DW_OP_push_object_address
:
8729 return "DW_OP_push_object_address";
8731 return "DW_OP_call2";
8733 return "DW_OP_call4";
8734 case DW_OP_call_ref
:
8735 return "DW_OP_call_ref";
8736 /* GNU extensions. */
8737 case DW_OP_form_tls_address
:
8738 return "DW_OP_form_tls_address";
8739 case DW_OP_call_frame_cfa
:
8740 return "DW_OP_call_frame_cfa";
8741 case DW_OP_bit_piece
:
8742 return "DW_OP_bit_piece";
8743 case DW_OP_GNU_push_tls_address
:
8744 return "DW_OP_GNU_push_tls_address";
8745 case DW_OP_GNU_uninit
:
8746 return "DW_OP_GNU_uninit";
8747 /* HP extensions. */
8748 case DW_OP_HP_is_value
:
8749 return "DW_OP_HP_is_value";
8750 case DW_OP_HP_fltconst4
:
8751 return "DW_OP_HP_fltconst4";
8752 case DW_OP_HP_fltconst8
:
8753 return "DW_OP_HP_fltconst8";
8754 case DW_OP_HP_mod_range
:
8755 return "DW_OP_HP_mod_range";
8756 case DW_OP_HP_unmod_range
:
8757 return "DW_OP_HP_unmod_range";
8759 return "DW_OP_HP_tls";
8761 return "OP_<unknown>";
8766 dwarf_bool_name (unsigned mybool
)
8774 /* Convert a DWARF type code into its string name. */
8777 dwarf_type_encoding_name (unsigned enc
)
8782 return "DW_ATE_void";
8783 case DW_ATE_address
:
8784 return "DW_ATE_address";
8785 case DW_ATE_boolean
:
8786 return "DW_ATE_boolean";
8787 case DW_ATE_complex_float
:
8788 return "DW_ATE_complex_float";
8790 return "DW_ATE_float";
8792 return "DW_ATE_signed";
8793 case DW_ATE_signed_char
:
8794 return "DW_ATE_signed_char";
8795 case DW_ATE_unsigned
:
8796 return "DW_ATE_unsigned";
8797 case DW_ATE_unsigned_char
:
8798 return "DW_ATE_unsigned_char";
8800 case DW_ATE_imaginary_float
:
8801 return "DW_ATE_imaginary_float";
8802 case DW_ATE_packed_decimal
:
8803 return "DW_ATE_packed_decimal";
8804 case DW_ATE_numeric_string
:
8805 return "DW_ATE_numeric_string";
8807 return "DW_ATE_edited";
8808 case DW_ATE_signed_fixed
:
8809 return "DW_ATE_signed_fixed";
8810 case DW_ATE_unsigned_fixed
:
8811 return "DW_ATE_unsigned_fixed";
8812 case DW_ATE_decimal_float
:
8813 return "DW_ATE_decimal_float";
8814 /* HP extensions. */
8815 case DW_ATE_HP_float80
:
8816 return "DW_ATE_HP_float80";
8817 case DW_ATE_HP_complex_float80
:
8818 return "DW_ATE_HP_complex_float80";
8819 case DW_ATE_HP_float128
:
8820 return "DW_ATE_HP_float128";
8821 case DW_ATE_HP_complex_float128
:
8822 return "DW_ATE_HP_complex_float128";
8823 case DW_ATE_HP_floathpintel
:
8824 return "DW_ATE_HP_floathpintel";
8825 case DW_ATE_HP_imaginary_float80
:
8826 return "DW_ATE_HP_imaginary_float80";
8827 case DW_ATE_HP_imaginary_float128
:
8828 return "DW_ATE_HP_imaginary_float128";
8830 return "DW_ATE_<unknown>";
8834 /* Convert a DWARF call frame info operation to its string name. */
8838 dwarf_cfi_name (unsigned cfi_opc
)
8842 case DW_CFA_advance_loc
:
8843 return "DW_CFA_advance_loc";
8845 return "DW_CFA_offset";
8846 case DW_CFA_restore
:
8847 return "DW_CFA_restore";
8849 return "DW_CFA_nop";
8850 case DW_CFA_set_loc
:
8851 return "DW_CFA_set_loc";
8852 case DW_CFA_advance_loc1
:
8853 return "DW_CFA_advance_loc1";
8854 case DW_CFA_advance_loc2
:
8855 return "DW_CFA_advance_loc2";
8856 case DW_CFA_advance_loc4
:
8857 return "DW_CFA_advance_loc4";
8858 case DW_CFA_offset_extended
:
8859 return "DW_CFA_offset_extended";
8860 case DW_CFA_restore_extended
:
8861 return "DW_CFA_restore_extended";
8862 case DW_CFA_undefined
:
8863 return "DW_CFA_undefined";
8864 case DW_CFA_same_value
:
8865 return "DW_CFA_same_value";
8866 case DW_CFA_register
:
8867 return "DW_CFA_register";
8868 case DW_CFA_remember_state
:
8869 return "DW_CFA_remember_state";
8870 case DW_CFA_restore_state
:
8871 return "DW_CFA_restore_state";
8872 case DW_CFA_def_cfa
:
8873 return "DW_CFA_def_cfa";
8874 case DW_CFA_def_cfa_register
:
8875 return "DW_CFA_def_cfa_register";
8876 case DW_CFA_def_cfa_offset
:
8877 return "DW_CFA_def_cfa_offset";
8879 case DW_CFA_def_cfa_expression
:
8880 return "DW_CFA_def_cfa_expression";
8881 case DW_CFA_expression
:
8882 return "DW_CFA_expression";
8883 case DW_CFA_offset_extended_sf
:
8884 return "DW_CFA_offset_extended_sf";
8885 case DW_CFA_def_cfa_sf
:
8886 return "DW_CFA_def_cfa_sf";
8887 case DW_CFA_def_cfa_offset_sf
:
8888 return "DW_CFA_def_cfa_offset_sf";
8889 case DW_CFA_val_offset
:
8890 return "DW_CFA_val_offset";
8891 case DW_CFA_val_offset_sf
:
8892 return "DW_CFA_val_offset_sf";
8893 case DW_CFA_val_expression
:
8894 return "DW_CFA_val_expression";
8895 /* SGI/MIPS specific. */
8896 case DW_CFA_MIPS_advance_loc8
:
8897 return "DW_CFA_MIPS_advance_loc8";
8898 /* GNU extensions. */
8899 case DW_CFA_GNU_window_save
:
8900 return "DW_CFA_GNU_window_save";
8901 case DW_CFA_GNU_args_size
:
8902 return "DW_CFA_GNU_args_size";
8903 case DW_CFA_GNU_negative_offset_extended
:
8904 return "DW_CFA_GNU_negative_offset_extended";
8906 return "DW_CFA_<unknown>";
8912 dump_die (struct die_info
*die
)
8916 fprintf_unfiltered (gdb_stderr
, "Die: %s (abbrev = %d, offset = %d)\n",
8917 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
8918 fprintf_unfiltered (gdb_stderr
, "\thas children: %s\n",
8919 dwarf_bool_name (die
->child
!= NULL
));
8921 fprintf_unfiltered (gdb_stderr
, "\tattributes:\n");
8922 for (i
= 0; i
< die
->num_attrs
; ++i
)
8924 fprintf_unfiltered (gdb_stderr
, "\t\t%s (%s) ",
8925 dwarf_attr_name (die
->attrs
[i
].name
),
8926 dwarf_form_name (die
->attrs
[i
].form
));
8927 switch (die
->attrs
[i
].form
)
8929 case DW_FORM_ref_addr
:
8931 fprintf_unfiltered (gdb_stderr
, "address: ");
8932 deprecated_print_address_numeric (DW_ADDR (&die
->attrs
[i
]), 1, gdb_stderr
);
8934 case DW_FORM_block2
:
8935 case DW_FORM_block4
:
8937 case DW_FORM_block1
:
8938 fprintf_unfiltered (gdb_stderr
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
8943 fprintf_unfiltered (gdb_stderr
, "constant ref: %ld (adjusted)",
8944 (long) (DW_ADDR (&die
->attrs
[i
])));
8952 fprintf_unfiltered (gdb_stderr
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
8954 case DW_FORM_string
:
8956 fprintf_unfiltered (gdb_stderr
, "string: \"%s\"",
8957 DW_STRING (&die
->attrs
[i
])
8958 ? DW_STRING (&die
->attrs
[i
]) : "");
8961 if (DW_UNSND (&die
->attrs
[i
]))
8962 fprintf_unfiltered (gdb_stderr
, "flag: TRUE");
8964 fprintf_unfiltered (gdb_stderr
, "flag: FALSE");
8966 case DW_FORM_indirect
:
8967 /* the reader will have reduced the indirect form to
8968 the "base form" so this form should not occur */
8969 fprintf_unfiltered (gdb_stderr
, "unexpected attribute form: DW_FORM_indirect");
8972 fprintf_unfiltered (gdb_stderr
, "unsupported attribute form: %d.",
8973 die
->attrs
[i
].form
);
8975 fprintf_unfiltered (gdb_stderr
, "\n");
8980 dump_die_list (struct die_info
*die
)
8985 if (die
->child
!= NULL
)
8986 dump_die_list (die
->child
);
8987 if (die
->sibling
!= NULL
)
8988 dump_die_list (die
->sibling
);
8993 store_in_ref_table (unsigned int offset
, struct die_info
*die
,
8994 struct dwarf2_cu
*cu
)
8997 struct die_info
*old
;
8999 h
= (offset
% REF_HASH_SIZE
);
9000 old
= cu
->die_ref_table
[h
];
9001 die
->next_ref
= old
;
9002 cu
->die_ref_table
[h
] = die
;
9006 dwarf2_get_ref_die_offset (struct attribute
*attr
, struct dwarf2_cu
*cu
)
9008 unsigned int result
= 0;
9012 case DW_FORM_ref_addr
:
9017 case DW_FORM_ref_udata
:
9018 result
= DW_ADDR (attr
);
9021 complaint (&symfile_complaints
,
9022 _("unsupported die ref attribute form: '%s'"),
9023 dwarf_form_name (attr
->form
));
9028 /* Return the constant value held by the given attribute. Return -1
9029 if the value held by the attribute is not constant. */
9032 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
9034 if (attr
->form
== DW_FORM_sdata
)
9035 return DW_SND (attr
);
9036 else if (attr
->form
== DW_FORM_udata
9037 || attr
->form
== DW_FORM_data1
9038 || attr
->form
== DW_FORM_data2
9039 || attr
->form
== DW_FORM_data4
9040 || attr
->form
== DW_FORM_data8
)
9041 return DW_UNSND (attr
);
9044 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
9045 dwarf_form_name (attr
->form
));
9046 return default_value
;
9050 static struct die_info
*
9051 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
9052 struct dwarf2_cu
*cu
)
9054 struct die_info
*die
;
9055 unsigned int offset
;
9057 struct die_info temp_die
;
9058 struct dwarf2_cu
*target_cu
;
9060 offset
= dwarf2_get_ref_die_offset (attr
, cu
);
9062 if (DW_ADDR (attr
) < cu
->header
.offset
9063 || DW_ADDR (attr
) >= cu
->header
.offset
+ cu
->header
.length
)
9065 struct dwarf2_per_cu_data
*per_cu
;
9066 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (attr
),
9068 target_cu
= per_cu
->cu
;
9073 h
= (offset
% REF_HASH_SIZE
);
9074 die
= target_cu
->die_ref_table
[h
];
9077 if (die
->offset
== offset
)
9079 die
= die
->next_ref
;
9082 error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE "
9083 "at 0x%lx [in module %s]"),
9084 (long) src_die
->offset
, (long) offset
, cu
->objfile
->name
);
9089 /* Decode simple location descriptions.
9090 Given a pointer to a dwarf block that defines a location, compute
9091 the location and return the value.
9093 NOTE drow/2003-11-18: This function is called in two situations
9094 now: for the address of static or global variables (partial symbols
9095 only) and for offsets into structures which are expected to be
9096 (more or less) constant. The partial symbol case should go away,
9097 and only the constant case should remain. That will let this
9098 function complain more accurately. A few special modes are allowed
9099 without complaint for global variables (for instance, global
9100 register values and thread-local values).
9102 A location description containing no operations indicates that the
9103 object is optimized out. The return value is 0 for that case.
9104 FIXME drow/2003-11-16: No callers check for this case any more; soon all
9105 callers will only want a very basic result and this can become a
9108 Note that stack[0] is unused except as a default error return.
9109 Note that stack overflow is not yet handled. */
9112 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
9114 struct objfile
*objfile
= cu
->objfile
;
9115 struct comp_unit_head
*cu_header
= &cu
->header
;
9117 int size
= blk
->size
;
9118 gdb_byte
*data
= blk
->data
;
9119 CORE_ADDR stack
[64];
9121 unsigned int bytes_read
, unsnd
;
9165 stack
[++stacki
] = op
- DW_OP_lit0
;
9200 stack
[++stacki
] = op
- DW_OP_reg0
;
9202 dwarf2_complex_location_expr_complaint ();
9206 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9208 stack
[++stacki
] = unsnd
;
9210 dwarf2_complex_location_expr_complaint ();
9214 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
9220 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
9225 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
9230 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
9235 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
9240 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
9245 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
9250 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
9256 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
9261 stack
[stacki
+ 1] = stack
[stacki
];
9266 stack
[stacki
- 1] += stack
[stacki
];
9270 case DW_OP_plus_uconst
:
9271 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9276 stack
[stacki
- 1] -= stack
[stacki
];
9281 /* If we're not the last op, then we definitely can't encode
9282 this using GDB's address_class enum. This is valid for partial
9283 global symbols, although the variable's address will be bogus
9286 dwarf2_complex_location_expr_complaint ();
9289 case DW_OP_GNU_push_tls_address
:
9290 /* The top of the stack has the offset from the beginning
9291 of the thread control block at which the variable is located. */
9292 /* Nothing should follow this operator, so the top of stack would
9294 /* This is valid for partial global symbols, but the variable's
9295 address will be bogus in the psymtab. */
9297 dwarf2_complex_location_expr_complaint ();
9300 case DW_OP_GNU_uninit
:
9304 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
9305 dwarf_stack_op_name (op
));
9306 return (stack
[stacki
]);
9309 return (stack
[stacki
]);
9312 /* memory allocation interface */
9314 static struct dwarf_block
*
9315 dwarf_alloc_block (struct dwarf2_cu
*cu
)
9317 struct dwarf_block
*blk
;
9319 blk
= (struct dwarf_block
*)
9320 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
9324 static struct abbrev_info
*
9325 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
9327 struct abbrev_info
*abbrev
;
9329 abbrev
= (struct abbrev_info
*)
9330 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
9331 memset (abbrev
, 0, sizeof (struct abbrev_info
));
9335 static struct die_info
*
9336 dwarf_alloc_die (void)
9338 struct die_info
*die
;
9340 die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
9341 memset (die
, 0, sizeof (struct die_info
));
9346 /* Macro support. */
9349 /* Return the full name of file number I in *LH's file name table.
9350 Use COMP_DIR as the name of the current directory of the
9351 compilation. The result is allocated using xmalloc; the caller is
9352 responsible for freeing it. */
9354 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
9356 /* Is the file number a valid index into the line header's file name
9357 table? Remember that file numbers start with one, not zero. */
9358 if (1 <= file
&& file
<= lh
->num_file_names
)
9360 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
9362 if (IS_ABSOLUTE_PATH (fe
->name
))
9363 return xstrdup (fe
->name
);
9371 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9377 dir_len
= strlen (dir
);
9378 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
9379 strcpy (full_name
, dir
);
9380 full_name
[dir_len
] = '/';
9381 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
9385 return xstrdup (fe
->name
);
9390 /* The compiler produced a bogus file number. We can at least
9391 record the macro definitions made in the file, even if we
9392 won't be able to find the file by name. */
9394 sprintf (fake_name
, "<bad macro file number %d>", file
);
9396 complaint (&symfile_complaints
,
9397 _("bad file number in macro information (%d)"),
9400 return xstrdup (fake_name
);
9405 static struct macro_source_file
*
9406 macro_start_file (int file
, int line
,
9407 struct macro_source_file
*current_file
,
9408 const char *comp_dir
,
9409 struct line_header
*lh
, struct objfile
*objfile
)
9411 /* The full name of this source file. */
9412 char *full_name
= file_full_name (file
, lh
, comp_dir
);
9414 /* We don't create a macro table for this compilation unit
9415 at all until we actually get a filename. */
9416 if (! pending_macros
)
9417 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
9418 objfile
->macro_cache
);
9421 /* If we have no current file, then this must be the start_file
9422 directive for the compilation unit's main source file. */
9423 current_file
= macro_set_main (pending_macros
, full_name
);
9425 current_file
= macro_include (current_file
, line
, full_name
);
9429 return current_file
;
9433 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
9434 followed by a null byte. */
9436 copy_string (const char *buf
, int len
)
9438 char *s
= xmalloc (len
+ 1);
9439 memcpy (s
, buf
, len
);
9447 consume_improper_spaces (const char *p
, const char *body
)
9451 complaint (&symfile_complaints
,
9452 _("macro definition contains spaces in formal argument list:\n`%s'"),
9464 parse_macro_definition (struct macro_source_file
*file
, int line
,
9469 /* The body string takes one of two forms. For object-like macro
9470 definitions, it should be:
9472 <macro name> " " <definition>
9474 For function-like macro definitions, it should be:
9476 <macro name> "() " <definition>
9478 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
9480 Spaces may appear only where explicitly indicated, and in the
9483 The Dwarf 2 spec says that an object-like macro's name is always
9484 followed by a space, but versions of GCC around March 2002 omit
9485 the space when the macro's definition is the empty string.
9487 The Dwarf 2 spec says that there should be no spaces between the
9488 formal arguments in a function-like macro's formal argument list,
9489 but versions of GCC around March 2002 include spaces after the
9493 /* Find the extent of the macro name. The macro name is terminated
9494 by either a space or null character (for an object-like macro) or
9495 an opening paren (for a function-like macro). */
9496 for (p
= body
; *p
; p
++)
9497 if (*p
== ' ' || *p
== '(')
9500 if (*p
== ' ' || *p
== '\0')
9502 /* It's an object-like macro. */
9503 int name_len
= p
- body
;
9504 char *name
= copy_string (body
, name_len
);
9505 const char *replacement
;
9508 replacement
= body
+ name_len
+ 1;
9511 dwarf2_macro_malformed_definition_complaint (body
);
9512 replacement
= body
+ name_len
;
9515 macro_define_object (file
, line
, name
, replacement
);
9521 /* It's a function-like macro. */
9522 char *name
= copy_string (body
, p
- body
);
9525 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
9529 p
= consume_improper_spaces (p
, body
);
9531 /* Parse the formal argument list. */
9532 while (*p
&& *p
!= ')')
9534 /* Find the extent of the current argument name. */
9535 const char *arg_start
= p
;
9537 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
9540 if (! *p
|| p
== arg_start
)
9541 dwarf2_macro_malformed_definition_complaint (body
);
9544 /* Make sure argv has room for the new argument. */
9545 if (argc
>= argv_size
)
9548 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
9551 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
9554 p
= consume_improper_spaces (p
, body
);
9556 /* Consume the comma, if present. */
9561 p
= consume_improper_spaces (p
, body
);
9570 /* Perfectly formed definition, no complaints. */
9571 macro_define_function (file
, line
, name
,
9572 argc
, (const char **) argv
,
9574 else if (*p
== '\0')
9576 /* Complain, but do define it. */
9577 dwarf2_macro_malformed_definition_complaint (body
);
9578 macro_define_function (file
, line
, name
,
9579 argc
, (const char **) argv
,
9583 /* Just complain. */
9584 dwarf2_macro_malformed_definition_complaint (body
);
9587 /* Just complain. */
9588 dwarf2_macro_malformed_definition_complaint (body
);
9594 for (i
= 0; i
< argc
; i
++)
9600 dwarf2_macro_malformed_definition_complaint (body
);
9605 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
9606 char *comp_dir
, bfd
*abfd
,
9607 struct dwarf2_cu
*cu
)
9609 gdb_byte
*mac_ptr
, *mac_end
;
9610 struct macro_source_file
*current_file
= 0;
9612 if (dwarf2_per_objfile
->macinfo_buffer
== NULL
)
9614 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
9618 mac_ptr
= dwarf2_per_objfile
->macinfo_buffer
+ offset
;
9619 mac_end
= dwarf2_per_objfile
->macinfo_buffer
9620 + dwarf2_per_objfile
->macinfo_size
;
9624 enum dwarf_macinfo_record_type macinfo_type
;
9626 /* Do we at least have room for a macinfo type byte? */
9627 if (mac_ptr
>= mac_end
)
9629 dwarf2_macros_too_long_complaint ();
9633 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
9636 switch (macinfo_type
)
9638 /* A zero macinfo type indicates the end of the macro
9643 case DW_MACINFO_define
:
9644 case DW_MACINFO_undef
:
9646 unsigned int bytes_read
;
9650 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9651 mac_ptr
+= bytes_read
;
9652 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
9653 mac_ptr
+= bytes_read
;
9656 complaint (&symfile_complaints
,
9657 _("debug info gives macro %s outside of any file: %s"),
9659 DW_MACINFO_define
? "definition" : macinfo_type
==
9660 DW_MACINFO_undef
? "undefinition" :
9661 "something-or-other", body
);
9664 if (macinfo_type
== DW_MACINFO_define
)
9665 parse_macro_definition (current_file
, line
, body
);
9666 else if (macinfo_type
== DW_MACINFO_undef
)
9667 macro_undef (current_file
, line
, body
);
9672 case DW_MACINFO_start_file
:
9674 unsigned int bytes_read
;
9677 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9678 mac_ptr
+= bytes_read
;
9679 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9680 mac_ptr
+= bytes_read
;
9682 current_file
= macro_start_file (file
, line
,
9683 current_file
, comp_dir
,
9688 case DW_MACINFO_end_file
:
9690 complaint (&symfile_complaints
,
9691 _("macro debug info has an unmatched `close_file' directive"));
9694 current_file
= current_file
->included_by
;
9697 enum dwarf_macinfo_record_type next_type
;
9699 /* GCC circa March 2002 doesn't produce the zero
9700 type byte marking the end of the compilation
9701 unit. Complain if it's not there, but exit no
9704 /* Do we at least have room for a macinfo type byte? */
9705 if (mac_ptr
>= mac_end
)
9707 dwarf2_macros_too_long_complaint ();
9711 /* We don't increment mac_ptr here, so this is just
9713 next_type
= read_1_byte (abfd
, mac_ptr
);
9715 complaint (&symfile_complaints
,
9716 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
9723 case DW_MACINFO_vendor_ext
:
9725 unsigned int bytes_read
;
9729 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9730 mac_ptr
+= bytes_read
;
9731 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
9732 mac_ptr
+= bytes_read
;
9734 /* We don't recognize any vendor extensions. */
9741 /* Check if the attribute's form is a DW_FORM_block*
9742 if so return true else false. */
9744 attr_form_is_block (struct attribute
*attr
)
9746 return (attr
== NULL
? 0 :
9747 attr
->form
== DW_FORM_block1
9748 || attr
->form
== DW_FORM_block2
9749 || attr
->form
== DW_FORM_block4
9750 || attr
->form
== DW_FORM_block
);
9753 /* Return non-zero if ATTR's value is a section offset --- classes
9754 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
9755 You may use DW_UNSND (attr) to retrieve such offsets.
9757 Section 7.5.4, "Attribute Encodings", explains that no attribute
9758 may have a value that belongs to more than one of these classes; it
9759 would be ambiguous if we did, because we use the same forms for all
9762 attr_form_is_section_offset (struct attribute
*attr
)
9764 return (attr
->form
== DW_FORM_data4
9765 || attr
->form
== DW_FORM_data8
);
9769 /* Return non-zero if ATTR's value falls in the 'constant' class, or
9770 zero otherwise. When this function returns true, you can apply
9771 dwarf2_get_attr_constant_value to it.
9773 However, note that for some attributes you must check
9774 attr_form_is_section_offset before using this test. DW_FORM_data4
9775 and DW_FORM_data8 are members of both the constant class, and of
9776 the classes that contain offsets into other debug sections
9777 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
9778 that, if an attribute's can be either a constant or one of the
9779 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
9780 taken as section offsets, not constants. */
9782 attr_form_is_constant (struct attribute
*attr
)
9799 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
9800 struct dwarf2_cu
*cu
)
9802 struct objfile
*objfile
= cu
->objfile
;
9804 /* Save the master objfile, so that we can report and look up the
9805 correct file containing this variable. */
9806 if (objfile
->separate_debug_objfile_backlink
)
9807 objfile
= objfile
->separate_debug_objfile_backlink
;
9809 if (attr_form_is_section_offset (attr
)
9810 /* ".debug_loc" may not exist at all, or the offset may be outside
9811 the section. If so, fall through to the complaint in the
9813 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc_size
)
9815 struct dwarf2_loclist_baton
*baton
;
9817 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9818 sizeof (struct dwarf2_loclist_baton
));
9819 baton
->objfile
= objfile
;
9821 /* We don't know how long the location list is, but make sure we
9822 don't run off the edge of the section. */
9823 baton
->size
= dwarf2_per_objfile
->loc_size
- DW_UNSND (attr
);
9824 baton
->data
= dwarf2_per_objfile
->loc_buffer
+ DW_UNSND (attr
);
9825 baton
->base_address
= cu
->header
.base_address
;
9826 if (cu
->header
.base_known
== 0)
9827 complaint (&symfile_complaints
,
9828 _("Location list used without specifying the CU base address."));
9830 SYMBOL_OPS (sym
) = &dwarf2_loclist_funcs
;
9831 SYMBOL_LOCATION_BATON (sym
) = baton
;
9835 struct dwarf2_locexpr_baton
*baton
;
9837 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9838 sizeof (struct dwarf2_locexpr_baton
));
9839 baton
->objfile
= objfile
;
9841 if (attr_form_is_block (attr
))
9843 /* Note that we're just copying the block's data pointer
9844 here, not the actual data. We're still pointing into the
9845 info_buffer for SYM's objfile; right now we never release
9846 that buffer, but when we do clean up properly this may
9848 baton
->size
= DW_BLOCK (attr
)->size
;
9849 baton
->data
= DW_BLOCK (attr
)->data
;
9853 dwarf2_invalid_attrib_class_complaint ("location description",
9854 SYMBOL_NATURAL_NAME (sym
));
9859 SYMBOL_OPS (sym
) = &dwarf2_locexpr_funcs
;
9860 SYMBOL_LOCATION_BATON (sym
) = baton
;
9864 /* Locate the compilation unit from CU's objfile which contains the
9865 DIE at OFFSET. Raises an error on failure. */
9867 static struct dwarf2_per_cu_data
*
9868 dwarf2_find_containing_comp_unit (unsigned long offset
,
9869 struct objfile
*objfile
)
9871 struct dwarf2_per_cu_data
*this_cu
;
9875 high
= dwarf2_per_objfile
->n_comp_units
- 1;
9878 int mid
= low
+ (high
- low
) / 2;
9879 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
9884 gdb_assert (low
== high
);
9885 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
9888 error (_("Dwarf Error: could not find partial DIE containing "
9889 "offset 0x%lx [in module %s]"),
9890 (long) offset
, bfd_get_filename (objfile
->obfd
));
9892 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
9893 return dwarf2_per_objfile
->all_comp_units
[low
-1];
9897 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
9898 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
9899 && offset
>= this_cu
->offset
+ this_cu
->length
)
9900 error (_("invalid dwarf2 offset %ld"), offset
);
9901 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
9906 /* Locate the compilation unit from OBJFILE which is located at exactly
9907 OFFSET. Raises an error on failure. */
9909 static struct dwarf2_per_cu_data
*
9910 dwarf2_find_comp_unit (unsigned long offset
, struct objfile
*objfile
)
9912 struct dwarf2_per_cu_data
*this_cu
;
9913 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
9914 if (this_cu
->offset
!= offset
)
9915 error (_("no compilation unit with offset %ld."), offset
);
9919 /* Release one cached compilation unit, CU. We unlink it from the tree
9920 of compilation units, but we don't remove it from the read_in_chain;
9921 the caller is responsible for that. */
9924 free_one_comp_unit (void *data
)
9926 struct dwarf2_cu
*cu
= data
;
9928 if (cu
->per_cu
!= NULL
)
9929 cu
->per_cu
->cu
= NULL
;
9932 obstack_free (&cu
->comp_unit_obstack
, NULL
);
9934 free_die_list (cu
->dies
);
9939 /* This cleanup function is passed the address of a dwarf2_cu on the stack
9940 when we're finished with it. We can't free the pointer itself, but be
9941 sure to unlink it from the cache. Also release any associated storage
9942 and perform cache maintenance.
9944 Only used during partial symbol parsing. */
9947 free_stack_comp_unit (void *data
)
9949 struct dwarf2_cu
*cu
= data
;
9951 obstack_free (&cu
->comp_unit_obstack
, NULL
);
9952 cu
->partial_dies
= NULL
;
9954 if (cu
->per_cu
!= NULL
)
9956 /* This compilation unit is on the stack in our caller, so we
9957 should not xfree it. Just unlink it. */
9958 cu
->per_cu
->cu
= NULL
;
9961 /* If we had a per-cu pointer, then we may have other compilation
9962 units loaded, so age them now. */
9963 age_cached_comp_units ();
9967 /* Free all cached compilation units. */
9970 free_cached_comp_units (void *data
)
9972 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9974 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9975 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9976 while (per_cu
!= NULL
)
9978 struct dwarf2_per_cu_data
*next_cu
;
9980 next_cu
= per_cu
->cu
->read_in_chain
;
9982 free_one_comp_unit (per_cu
->cu
);
9983 *last_chain
= next_cu
;
9989 /* Increase the age counter on each cached compilation unit, and free
9990 any that are too old. */
9993 age_cached_comp_units (void)
9995 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9997 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
9998 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9999 while (per_cu
!= NULL
)
10001 per_cu
->cu
->last_used
++;
10002 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
10003 dwarf2_mark (per_cu
->cu
);
10004 per_cu
= per_cu
->cu
->read_in_chain
;
10007 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10008 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10009 while (per_cu
!= NULL
)
10011 struct dwarf2_per_cu_data
*next_cu
;
10013 next_cu
= per_cu
->cu
->read_in_chain
;
10015 if (!per_cu
->cu
->mark
)
10017 free_one_comp_unit (per_cu
->cu
);
10018 *last_chain
= next_cu
;
10021 last_chain
= &per_cu
->cu
->read_in_chain
;
10027 /* Remove a single compilation unit from the cache. */
10030 free_one_cached_comp_unit (void *target_cu
)
10032 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
10034 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10035 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10036 while (per_cu
!= NULL
)
10038 struct dwarf2_per_cu_data
*next_cu
;
10040 next_cu
= per_cu
->cu
->read_in_chain
;
10042 if (per_cu
->cu
== target_cu
)
10044 free_one_comp_unit (per_cu
->cu
);
10045 *last_chain
= next_cu
;
10049 last_chain
= &per_cu
->cu
->read_in_chain
;
10055 /* Release all extra memory associated with OBJFILE. */
10058 dwarf2_free_objfile (struct objfile
*objfile
)
10060 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
10062 if (dwarf2_per_objfile
== NULL
)
10065 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
10066 free_cached_comp_units (NULL
);
10068 /* Everything else should be on the objfile obstack. */
10071 /* A pair of DIE offset and GDB type pointer. We store these
10072 in a hash table separate from the DIEs, and preserve them
10073 when the DIEs are flushed out of cache. */
10075 struct dwarf2_offset_and_type
10077 unsigned int offset
;
10081 /* Hash function for a dwarf2_offset_and_type. */
10084 offset_and_type_hash (const void *item
)
10086 const struct dwarf2_offset_and_type
*ofs
= item
;
10087 return ofs
->offset
;
10090 /* Equality function for a dwarf2_offset_and_type. */
10093 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
10095 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
10096 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
10097 return ofs_lhs
->offset
== ofs_rhs
->offset
;
10100 /* Set the type associated with DIE to TYPE. Save it in CU's hash
10101 table if necessary. */
10104 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
10106 struct dwarf2_offset_and_type
**slot
, ofs
;
10110 if (cu
->per_cu
== NULL
)
10113 if (cu
->per_cu
->type_hash
== NULL
)
10114 cu
->per_cu
->type_hash
10115 = htab_create_alloc_ex (cu
->header
.length
/ 24,
10116 offset_and_type_hash
,
10117 offset_and_type_eq
,
10119 &cu
->objfile
->objfile_obstack
,
10120 hashtab_obstack_allocate
,
10121 dummy_obstack_deallocate
);
10123 ofs
.offset
= die
->offset
;
10125 slot
= (struct dwarf2_offset_and_type
**)
10126 htab_find_slot_with_hash (cu
->per_cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
10127 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
10131 /* Find the type for DIE in TYPE_HASH, or return NULL if DIE does not
10132 have a saved type. */
10134 static struct type
*
10135 get_die_type (struct die_info
*die
, htab_t type_hash
)
10137 struct dwarf2_offset_and_type
*slot
, ofs
;
10139 ofs
.offset
= die
->offset
;
10140 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
10147 /* Restore the types of the DIE tree starting at START_DIE from the hash
10148 table saved in CU. */
10151 reset_die_and_siblings_types (struct die_info
*start_die
, struct dwarf2_cu
*cu
)
10153 struct die_info
*die
;
10155 if (cu
->per_cu
->type_hash
== NULL
)
10158 for (die
= start_die
; die
!= NULL
; die
= die
->sibling
)
10160 die
->type
= get_die_type (die
, cu
->per_cu
->type_hash
);
10161 if (die
->child
!= NULL
)
10162 reset_die_and_siblings_types (die
->child
, cu
);
10166 /* Set the mark field in CU and in every other compilation unit in the
10167 cache that we must keep because we are keeping CU. */
10169 /* Add a dependence relationship from CU to REF_PER_CU. */
10172 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
10173 struct dwarf2_per_cu_data
*ref_per_cu
)
10177 if (cu
->dependencies
== NULL
)
10179 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
10180 NULL
, &cu
->comp_unit_obstack
,
10181 hashtab_obstack_allocate
,
10182 dummy_obstack_deallocate
);
10184 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
10186 *slot
= ref_per_cu
;
10189 /* Set the mark field in CU and in every other compilation unit in the
10190 cache that we must keep because we are keeping CU. */
10193 dwarf2_mark_helper (void **slot
, void *data
)
10195 struct dwarf2_per_cu_data
*per_cu
;
10197 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
10198 if (per_cu
->cu
->mark
)
10200 per_cu
->cu
->mark
= 1;
10202 if (per_cu
->cu
->dependencies
!= NULL
)
10203 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10209 dwarf2_mark (struct dwarf2_cu
*cu
)
10214 if (cu
->dependencies
!= NULL
)
10215 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10219 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
10223 per_cu
->cu
->mark
= 0;
10224 per_cu
= per_cu
->cu
->read_in_chain
;
10228 /* Trivial hash function for partial_die_info: the hash value of a DIE
10229 is its offset in .debug_info for this objfile. */
10232 partial_die_hash (const void *item
)
10234 const struct partial_die_info
*part_die
= item
;
10235 return part_die
->offset
;
10238 /* Trivial comparison function for partial_die_info structures: two DIEs
10239 are equal if they have the same offset. */
10242 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
10244 const struct partial_die_info
*part_die_lhs
= item_lhs
;
10245 const struct partial_die_info
*part_die_rhs
= item_rhs
;
10246 return part_die_lhs
->offset
== part_die_rhs
->offset
;
10249 static struct cmd_list_element
*set_dwarf2_cmdlist
;
10250 static struct cmd_list_element
*show_dwarf2_cmdlist
;
10253 set_dwarf2_cmd (char *args
, int from_tty
)
10255 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
10259 show_dwarf2_cmd (char *args
, int from_tty
)
10261 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
10264 void _initialize_dwarf2_read (void);
10267 _initialize_dwarf2_read (void)
10269 dwarf2_objfile_data_key
= register_objfile_data ();
10271 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
10272 Set DWARF 2 specific variables.\n\
10273 Configure DWARF 2 variables such as the cache size"),
10274 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
10275 0/*allow-unknown*/, &maintenance_set_cmdlist
);
10277 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
10278 Show DWARF 2 specific variables\n\
10279 Show DWARF 2 variables such as the cache size"),
10280 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
10281 0/*allow-unknown*/, &maintenance_show_cmdlist
);
10283 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
10284 &dwarf2_max_cache_age
, _("\
10285 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
10286 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
10287 A higher limit means that cached compilation units will be stored\n\
10288 in memory longer, and more total memory will be used. Zero disables\n\
10289 caching, which can slow down startup."),
10291 show_dwarf2_max_cache_age
,
10292 &set_dwarf2_cmdlist
,
10293 &show_dwarf2_cmdlist
);